diff --git a/WORKSPACE b/WORKSPACE
index 3ed0f2b..e7baa81 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -387,9 +387,13 @@
     url = "https://www.frc971.org/Build-Dependencies/nlopt-496be736b8b249273838b891f4c8ca3669551127.zip",
 )
 
-local_repository(
+http_archive(
     name = "com_google_absl",
-    path = "third_party/abseil",
+    patch_args = ["-p1"],
+    patches = ["//third_party/abseil:abseil.patch"],
+    sha256 = "91209b5eecd9c3d862b230fefbc2728c7f2764ff6d5866ec398d48db1aaa1e90",
+    strip_prefix = "abseil-cpp-bb63a76710554cebbeb20306739a7b832be38c4a",
+    url = "https://github.com/abseil/abseil-cpp/archive/bb63a76710554cebbeb20306739a7b832be38c4a.zip",
 )
 
 local_repository(
@@ -527,12 +531,12 @@
 
 bind(
     name = "gtest",
-    actual = "//third_party/googletest:googlemock",
+    actual = "@com_google_googletest//:gtest",
 )
 
 bind(
     name = "gtest_main",
-    actual = "//third_party/googletest:googlemock_main",
+    actual = "@com_google_googletest//:gtest_main",
 )
 
 # Recompressed from libusb-1.0.21.7z.
@@ -689,15 +693,23 @@
     path = "third_party/google-glog",
 )
 
-local_repository(
+http_archive(
     name = "com_google_googletest",
-    path = "third_party/googletest",
+    patch_args = ["-p1"],
+    patches = ["//third_party/googletest:googletest.patch"],
+    sha256 = "5c6d595243de011f8ce8cc68050cc0490726786e80cdfd6555ebfe148d920407",
+    strip_prefix = "googletest-356fc301251378e0f6fa6aa794d73714202887ac",
+    urls = ["https://github.com/google/googletest/archive/356fc301251378e0f6fa6aa794d73714202887ac.zip"],
 )
 
 # External dependency: Google Benchmark; has no Bazel build.
-local_repository(
+http_archive(
     name = "com_github_google_benchmark",
-    path = "third_party/google-benchmark",
+    patch_args = ["-p1"],
+    patches = ["//third_party/google-benchmark:benchmark.patch"],
+    sha256 = "6430e4092653380d9dc4ccb45a1e2dc9259d581f4866dc0759713126056bc1d7",
+    strip_prefix = "benchmark-1.7.1",
+    urls = ["https://github.com/google/benchmark/archive/refs/tags/v1.7.1.tar.gz"],
 )
 
 local_repository(
@@ -1192,6 +1204,8 @@
 http_archive(
     name = "com_github_zaphoyd_websocketpp",
     build_file = "//third_party/websocketpp:websocketpp.BUILD",
+    patch_args = ["-p1"],
+    patches = ["//third_party/websocketpp:websocketpp.patch"],
     sha256 = "6ce889d85ecdc2d8fa07408d6787e7352510750daa66b5ad44aacb47bea76755",
     strip_prefix = "websocketpp-0.8.2",
     url = "https://github.com/zaphoyd/websocketpp/archive/refs/tags/0.8.2.tar.gz",
diff --git a/aos/containers/sized_array_test.cc b/aos/containers/sized_array_test.cc
index c5065f8..ae732bc 100644
--- a/aos/containers/sized_array_test.cc
+++ b/aos/containers/sized_array_test.cc
@@ -138,13 +138,19 @@
 // Tests various ways of filling up and emptying.
 TEST(SizedArrayTest, FillEmpty) {
   SizedArray<int, 2> a;
+  // The absl InlinedVector is overly clever and realizes that, for certain
+  // vectors, we can increase the static size of the vector for free...
+  EXPECT_EQ(4, a.capacity());
   EXPECT_TRUE(a.empty());
   EXPECT_NE(a.size(), a.capacity());
   a.push_back(9);
   EXPECT_FALSE(a.empty());
   EXPECT_NE(a.size(), a.capacity());
+  a.push_back(9);
+  EXPECT_FALSE(a.empty());
   a.push_back(7);
   EXPECT_FALSE(a.empty());
+  a.push_back(1);
   EXPECT_EQ(a.size(), a.capacity());
 
   a.clear();
diff --git a/third_party/abseil/ABSEIL_ISSUE_TEMPLATE.md b/third_party/abseil/ABSEIL_ISSUE_TEMPLATE.md
deleted file mode 100644
index ed5461f..0000000
--- a/third_party/abseil/ABSEIL_ISSUE_TEMPLATE.md
+++ /dev/null
@@ -1,22 +0,0 @@
-Please submit a new Abseil Issue using the template below:
-
-## [Short title of proposed API change(s)]
-
---------------------------------------------------------------------------------
---------------------------------------------------------------------------------
-
-## Background
-
-[Provide the background information that is required in order to evaluate the
-proposed API changes. No controversial claims should be made here. If there are
-design constraints that need to be considered, they should be presented here
-**along with justification for those constraints**. Linking to other docs is
-good, but please keep the **pertinent information as self contained** as
-possible in this section.]
-
-## Proposed API Change (s)
-
-[Please clearly describe the API change(s) being proposed. If multiple changes,
-please keep them clearly distinguished. When possible, **use example code
-snippets to illustrate before-after API usages**. List pros-n-cons. Highlight
-the main questions that you want to be answered. Given the Abseil project compatibility requirements, describe why the API change is safe.]
diff --git a/third_party/abseil/AUTHORS b/third_party/abseil/AUTHORS
deleted file mode 100644
index 976d31d..0000000
--- a/third_party/abseil/AUTHORS
+++ /dev/null
@@ -1,6 +0,0 @@
-# This is the list of Abseil authors for copyright purposes.
-#
-# This does not necessarily list everyone who has contributed code, since in
-# some cases, their employer may be the copyright holder.  To see the full list
-# of contributors, see the revision history in source control.
-Google Inc.
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/__init__.py b/third_party/abseil/BUILD
old mode 100755
new mode 100644
similarity index 100%
rename from third_party/googletest/googlemock/scripts/generator/cpp/__init__.py
rename to third_party/abseil/BUILD
diff --git a/third_party/abseil/BUILD.bazel b/third_party/abseil/BUILD.bazel
deleted file mode 100644
index 79fb0ec..0000000
--- a/third_party/abseil/BUILD.bazel
+++ /dev/null
@@ -1,25 +0,0 @@
-#
-# Copyright 2020 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])  # Apache 2.0
-
-# Expose license for external usage through bazel.
-exports_files([
-    "AUTHORS",
-    "LICENSE",
-])
diff --git a/third_party/abseil/CMake/AbseilDll.cmake b/third_party/abseil/CMake/AbseilDll.cmake
deleted file mode 100644
index 7c98b21..0000000
--- a/third_party/abseil/CMake/AbseilDll.cmake
+++ /dev/null
@@ -1,519 +0,0 @@
-include(CMakeParseArguments)
-
-set(ABSL_INTERNAL_DLL_FILES
-  "algorithm/algorithm.h"
-  "algorithm/container.h"
-  "base/attributes.h"
-  "base/call_once.h"
-  "base/casts.h"
-  "base/config.h"
-  "base/const_init.h"
-  "base/dynamic_annotations.h"
-  "base/internal/atomic_hook.h"
-  "base/internal/cycleclock.cc"
-  "base/internal/cycleclock.h"
-  "base/internal/direct_mmap.h"
-  "base/internal/dynamic_annotations.h"
-  "base/internal/endian.h"
-  "base/internal/errno_saver.h"
-  "base/internal/exponential_biased.cc"
-  "base/internal/exponential_biased.h"
-  "base/internal/fast_type_id.h"
-  "base/internal/hide_ptr.h"
-  "base/internal/identity.h"
-  "base/internal/invoke.h"
-  "base/internal/inline_variable.h"
-  "base/internal/low_level_alloc.cc"
-  "base/internal/low_level_alloc.h"
-  "base/internal/low_level_scheduling.h"
-  "base/internal/per_thread_tls.h"
-  "base/internal/periodic_sampler.cc"
-  "base/internal/periodic_sampler.h"
-  "base/internal/pretty_function.h"
-  "base/internal/raw_logging.cc"
-  "base/internal/raw_logging.h"
-  "base/internal/scheduling_mode.h"
-  "base/internal/scoped_set_env.cc"
-  "base/internal/scoped_set_env.h"
-  "base/internal/strerror.h"
-  "base/internal/strerror.cc"
-  "base/internal/spinlock.cc"
-  "base/internal/spinlock.h"
-  "base/internal/spinlock_wait.cc"
-  "base/internal/spinlock_wait.h"
-  "base/internal/sysinfo.cc"
-  "base/internal/sysinfo.h"
-  "base/internal/thread_annotations.h"
-  "base/internal/thread_identity.cc"
-  "base/internal/thread_identity.h"
-  "base/internal/throw_delegate.cc"
-  "base/internal/throw_delegate.h"
-  "base/internal/tsan_mutex_interface.h"
-  "base/internal/unaligned_access.h"
-  "base/internal/unscaledcycleclock.cc"
-  "base/internal/unscaledcycleclock.h"
-  "base/log_severity.cc"
-  "base/log_severity.h"
-  "base/macros.h"
-  "base/optimization.h"
-  "base/options.h"
-  "base/policy_checks.h"
-  "base/port.h"
-  "base/thread_annotations.h"
-  "container/btree_map.h"
-  "container/btree_set.h"
-  "container/fixed_array.h"
-  "container/flat_hash_map.h"
-  "container/flat_hash_set.h"
-  "container/inlined_vector.h"
-  "container/internal/btree.h"
-  "container/internal/btree_container.h"
-  "container/internal/common.h"
-  "container/internal/compressed_tuple.h"
-  "container/internal/container_memory.h"
-  "container/internal/counting_allocator.h"
-  "container/internal/hash_function_defaults.h"
-  "container/internal/hash_policy_traits.h"
-  "container/internal/hashtable_debug.h"
-  "container/internal/hashtable_debug_hooks.h"
-  "container/internal/hashtablez_sampler.cc"
-  "container/internal/hashtablez_sampler.h"
-  "container/internal/hashtablez_sampler_force_weak_definition.cc"
-  "container/internal/have_sse.h"
-  "container/internal/inlined_vector.h"
-  "container/internal/layout.h"
-  "container/internal/node_hash_policy.h"
-  "container/internal/raw_hash_map.h"
-  "container/internal/raw_hash_set.cc"
-  "container/internal/raw_hash_set.h"
-  "container/internal/tracked.h"
-  "container/node_hash_map.h"
-  "container/node_hash_set.h"
-  "debugging/failure_signal_handler.cc"
-  "debugging/failure_signal_handler.h"
-  "debugging/leak_check.h"
-  "debugging/leak_check_disable.cc"
-  "debugging/stacktrace.cc"
-  "debugging/stacktrace.h"
-  "debugging/symbolize.cc"
-  "debugging/symbolize.h"
-  "debugging/internal/address_is_readable.cc"
-  "debugging/internal/address_is_readable.h"
-  "debugging/internal/demangle.cc"
-  "debugging/internal/demangle.h"
-  "debugging/internal/elf_mem_image.cc"
-  "debugging/internal/elf_mem_image.h"
-  "debugging/internal/examine_stack.cc"
-  "debugging/internal/examine_stack.h"
-  "debugging/internal/stack_consumption.cc"
-  "debugging/internal/stack_consumption.h"
-  "debugging/internal/stacktrace_config.h"
-  "debugging/internal/symbolize.h"
-  "debugging/internal/vdso_support.cc"
-  "debugging/internal/vdso_support.h"
-  "functional/internal/front_binder.h"
-  "functional/bind_front.h"
-  "functional/function_ref.h"
-  "functional/internal/function_ref.h"
-  "hash/hash.h"
-  "hash/internal/city.h"
-  "hash/internal/city.cc"
-  "hash/internal/hash.h"
-  "hash/internal/hash.cc"
-  "hash/internal/spy_hash_state.h"
-  "hash/internal/wyhash.h"
-  "hash/internal/wyhash.cc"
-  "memory/memory.h"
-  "meta/type_traits.h"
-  "numeric/bits.h"
-  "numeric/int128.cc"
-  "numeric/int128.h"
-  "numeric/internal/bits.h"
-  "random/bernoulli_distribution.h"
-  "random/beta_distribution.h"
-  "random/bit_gen_ref.h"
-  "random/discrete_distribution.cc"
-  "random/discrete_distribution.h"
-  "random/distributions.h"
-  "random/exponential_distribution.h"
-  "random/gaussian_distribution.cc"
-  "random/gaussian_distribution.h"
-  "random/internal/distribution_caller.h"
-  "random/internal/fastmath.h"
-  "random/internal/fast_uniform_bits.h"
-  "random/internal/generate_real.h"
-  "random/internal/iostream_state_saver.h"
-  "random/internal/mock_helpers.h"
-  "random/internal/nonsecure_base.h"
-  "random/internal/pcg_engine.h"
-  "random/internal/platform.h"
-  "random/internal/pool_urbg.cc"
-  "random/internal/pool_urbg.h"
-  "random/internal/randen.cc"
-  "random/internal/randen.h"
-  "random/internal/randen_detect.cc"
-  "random/internal/randen_detect.h"
-  "random/internal/randen_engine.h"
-  "random/internal/randen_hwaes.cc"
-  "random/internal/randen_hwaes.h"
-  "random/internal/randen_round_keys.cc"
-  "random/internal/randen_slow.cc"
-  "random/internal/randen_slow.h"
-  "random/internal/randen_traits.h"
-  "random/internal/salted_seed_seq.h"
-  "random/internal/seed_material.cc"
-  "random/internal/seed_material.h"
-  "random/internal/sequence_urbg.h"
-  "random/internal/traits.h"
-  "random/internal/uniform_helper.h"
-  "random/internal/wide_multiply.h"
-  "random/log_uniform_int_distribution.h"
-  "random/poisson_distribution.h"
-  "random/random.h"
-  "random/seed_gen_exception.cc"
-  "random/seed_gen_exception.h"
-  "random/seed_sequences.cc"
-  "random/seed_sequences.h"
-  "random/uniform_int_distribution.h"
-  "random/uniform_real_distribution.h"
-  "random/zipf_distribution.h"
-  "status/internal/status_internal.h"
-  "status/internal/statusor_internal.h"
-  "status/status.h"
-  "status/status.cc"
-  "status/statusor.h"
-  "status/statusor.cc"
-  "status/status_payload_printer.h"
-  "status/status_payload_printer.cc"
-  "strings/ascii.cc"
-  "strings/ascii.h"
-  "strings/charconv.cc"
-  "strings/charconv.h"
-  "strings/cord.cc"
-  "strings/cord.h"
-  "strings/escaping.cc"
-  "strings/escaping.h"
-  "strings/internal/cord_internal.cc"
-  "strings/internal/cord_internal.h"
-  "strings/internal/cord_rep_flat.h"
-  "strings/internal/charconv_bigint.cc"
-  "strings/internal/charconv_bigint.h"
-  "strings/internal/charconv_parse.cc"
-  "strings/internal/charconv_parse.h"
-  "strings/internal/stl_type_traits.h"
-  "strings/internal/string_constant.h"
-  "strings/match.cc"
-  "strings/match.h"
-  "strings/numbers.cc"
-  "strings/numbers.h"
-  "strings/str_format.h"
-  "strings/str_cat.cc"
-  "strings/str_cat.h"
-  "strings/str_join.h"
-  "strings/str_replace.cc"
-  "strings/str_replace.h"
-  "strings/str_split.cc"
-  "strings/str_split.h"
-  "strings/string_view.cc"
-  "strings/string_view.h"
-  "strings/strip.h"
-  "strings/substitute.cc"
-  "strings/substitute.h"
-  "strings/internal/char_map.h"
-  "strings/internal/escaping.h"
-  "strings/internal/escaping.cc"
-  "strings/internal/memutil.cc"
-  "strings/internal/memutil.h"
-  "strings/internal/ostringstream.cc"
-  "strings/internal/ostringstream.h"
-  "strings/internal/pow10_helper.cc"
-  "strings/internal/pow10_helper.h"
-  "strings/internal/resize_uninitialized.h"
-  "strings/internal/str_format/arg.cc"
-  "strings/internal/str_format/arg.h"
-  "strings/internal/str_format/bind.cc"
-  "strings/internal/str_format/bind.h"
-  "strings/internal/str_format/checker.h"
-  "strings/internal/str_format/extension.cc"
-  "strings/internal/str_format/extension.h"
-  "strings/internal/str_format/float_conversion.cc"
-  "strings/internal/str_format/float_conversion.h"
-  "strings/internal/str_format/output.cc"
-  "strings/internal/str_format/output.h"
-  "strings/internal/str_format/parser.cc"
-  "strings/internal/str_format/parser.h"
-  "strings/internal/str_join_internal.h"
-  "strings/internal/str_split_internal.h"
-  "strings/internal/utf8.cc"
-  "strings/internal/utf8.h"
-  "synchronization/barrier.cc"
-  "synchronization/barrier.h"
-  "synchronization/blocking_counter.cc"
-  "synchronization/blocking_counter.h"
-  "synchronization/mutex.cc"
-  "synchronization/mutex.h"
-  "synchronization/notification.cc"
-  "synchronization/notification.h"
-  "synchronization/internal/create_thread_identity.cc"
-  "synchronization/internal/create_thread_identity.h"
-  "synchronization/internal/futex.h"
-  "synchronization/internal/graphcycles.cc"
-  "synchronization/internal/graphcycles.h"
-  "synchronization/internal/kernel_timeout.h"
-  "synchronization/internal/per_thread_sem.cc"
-  "synchronization/internal/per_thread_sem.h"
-  "synchronization/internal/thread_pool.h"
-  "synchronization/internal/waiter.cc"
-  "synchronization/internal/waiter.h"
-  "time/civil_time.cc"
-  "time/civil_time.h"
-  "time/clock.cc"
-  "time/clock.h"
-  "time/duration.cc"
-  "time/format.cc"
-  "time/time.cc"
-  "time/time.h"
-  "time/internal/cctz/include/cctz/civil_time.h"
-  "time/internal/cctz/include/cctz/civil_time_detail.h"
-  "time/internal/cctz/include/cctz/time_zone.h"
-  "time/internal/cctz/include/cctz/zone_info_source.h"
-  "time/internal/cctz/src/civil_time_detail.cc"
-  "time/internal/cctz/src/time_zone_fixed.cc"
-  "time/internal/cctz/src/time_zone_fixed.h"
-  "time/internal/cctz/src/time_zone_format.cc"
-  "time/internal/cctz/src/time_zone_if.cc"
-  "time/internal/cctz/src/time_zone_if.h"
-  "time/internal/cctz/src/time_zone_impl.cc"
-  "time/internal/cctz/src/time_zone_impl.h"
-  "time/internal/cctz/src/time_zone_info.cc"
-  "time/internal/cctz/src/time_zone_info.h"
-  "time/internal/cctz/src/time_zone_libc.cc"
-  "time/internal/cctz/src/time_zone_libc.h"
-  "time/internal/cctz/src/time_zone_lookup.cc"
-  "time/internal/cctz/src/time_zone_posix.cc"
-  "time/internal/cctz/src/time_zone_posix.h"
-  "time/internal/cctz/src/tzfile.h"
-  "time/internal/cctz/src/zone_info_source.cc"
-  "types/any.h"
-  "types/bad_any_cast.cc"
-  "types/bad_any_cast.h"
-  "types/bad_optional_access.cc"
-  "types/bad_optional_access.h"
-  "types/bad_variant_access.cc"
-  "types/bad_variant_access.h"
-  "types/compare.h"
-  "types/internal/conformance_aliases.h"
-  "types/internal/conformance_archetype.h"
-  "types/internal/conformance_profile.h"
-  "types/internal/parentheses.h"
-  "types/internal/transform_args.h"
-  "types/internal/variant.h"
-  "types/optional.h"
-  "types/internal/optional.h"
-  "types/span.h"
-  "types/internal/span.h"
-  "types/variant.h"
-  "utility/utility.h"
-)
-
-set(ABSL_INTERNAL_DLL_TARGETS
-  "stacktrace"
-  "symbolize"
-  "examine_stack"
-  "failure_signal_handler"
-  "debugging_internal"
-  "demangle_internal"
-  "leak_check"
-  "leak_check_disable"
-  "stack_consumption"
-  "debugging"
-  "hash"
-  "spy_hash_state"
-  "city"
-  "memory"
-  "strings"
-  "strings_internal"
-  "cord"
-  "str_format"
-  "str_format_internal"
-  "pow10_helper"
-  "int128"
-  "numeric"
-  "utility"
-  "any"
-  "bad_any_cast"
-  "bad_any_cast_impl"
-  "span"
-  "optional"
-  "bad_optional_access"
-  "bad_variant_access"
-  "variant"
-  "compare"
-  "algorithm"
-  "algorithm_container"
-  "graphcycles_internal"
-  "kernel_timeout_internal"
-  "synchronization"
-  "thread_pool"
-  "bind_front"
-  "function_ref"
-  "atomic_hook"
-  "log_severity"
-  "raw_logging_internal"
-  "spinlock_wait"
-  "config"
-  "dynamic_annotations"
-  "core_headers"
-  "malloc_internal"
-  "base_internal"
-  "base"
-  "throw_delegate"
-  "pretty_function"
-  "endian"
-  "bits"
-  "exponential_biased"
-  "periodic_sampler"
-  "scoped_set_env"
-  "type_traits"
-  "meta"
-  "random_random"
-  "random_bit_gen_ref"
-  "random_distributions"
-  "random_seed_gen_exception"
-  "random_seed_sequences"
-  "random_internal_traits"
-  "random_internal_distribution_caller"
-  "random_internal_distributions"
-  "random_internal_fast_uniform_bits"
-  "random_internal_seed_material"
-  "random_internal_pool_urbg"
-  "random_internal_explicit_seed_seq"
-  "random_internal_sequence_urbg"
-  "random_internal_salted_seed_seq"
-  "random_internal_iostream_state_saver"
-  "random_internal_generate_real"
-  "random_internal_wide_multiply"
-  "random_internal_fastmath"
-  "random_internal_nonsecure_base"
-  "random_internal_pcg_engine"
-  "random_internal_randen_engine"
-  "random_internal_platform"
-  "random_internal_randen"
-  "random_internal_randen_slow"
-  "random_internal_randen_hwaes"
-  "random_internal_randen_hwaes_impl"
-  "random_internal_uniform_helper"
-  "status"
-  "time"
-  "civil_time"
-  "time_zone"
-  "container"
-  "btree"
-  "compressed_tuple"
-  "fixed_array"
-  "inlined_vector_internal"
-  "inlined_vector"
-  "counting_allocator"
-  "flat_hash_map"
-  "flat_hash_set"
-  "node_hash_map"
-  "node_hash_set"
-  "container_memory"
-  "hash_function_defaults"
-  "hash_policy_traits"
-  "hashtablez_sampler"
-  "hashtable_debug"
-  "hashtable_debug_hooks"
-  "have_sse"
-  "node_hash_policy"
-  "raw_hash_map"
-  "container_common"
-  "raw_hash_set"
-  "layout"
-  "tracked"
-)
-
-function(absl_internal_dll_contains)
-  cmake_parse_arguments(ABSL_INTERNAL_DLL
-    ""
-    "OUTPUT;TARGET"
-    ""
-    ${ARGN}
-  )
-
-  STRING(REGEX REPLACE "^absl::" "" _target ${ABSL_INTERNAL_DLL_TARGET})
-
-  list(FIND
-    ABSL_INTERNAL_DLL_TARGETS
-    "${_target}"
-    _index)
-
-  if (${_index} GREATER -1)
-    set(${ABSL_INTERNAL_DLL_OUTPUT} 1 PARENT_SCOPE)
-  else()
-    set(${ABSL_INTERNAL_DLL_OUTPUT} 0 PARENT_SCOPE)
-  endif()
-endfunction()
-
-function(absl_internal_dll_targets)
-  cmake_parse_arguments(ABSL_INTERNAL_DLL
-  ""
-  "OUTPUT"
-  "DEPS"
-  ${ARGN}
-  )
-
-  set(_deps "")
-  foreach(dep IN LISTS ABSL_INTERNAL_DLL_DEPS)
-    absl_internal_dll_contains(TARGET ${dep} OUTPUT _contains)
-    if (_contains)
-      list(APPEND _deps abseil_dll)
-    else()
-      list(APPEND _deps ${dep})
-    endif()
-  endforeach()
-
-  # Because we may have added the DLL multiple times
-  list(REMOVE_DUPLICATES _deps)
-  set(${ABSL_INTERNAL_DLL_OUTPUT} "${_deps}" PARENT_SCOPE)
-endfunction()
-
-function(absl_make_dll)
-  add_library(
-    abseil_dll
-    SHARED
-      "${ABSL_INTERNAL_DLL_FILES}"
-  )
-  target_link_libraries(
-    abseil_dll
-    PRIVATE
-      ${ABSL_DEFAULT_LINKOPTS}
-  )
-  set_property(TARGET abseil_dll PROPERTY LINKER_LANGUAGE "CXX")
-  target_include_directories(
-    abseil_dll
-    PUBLIC
-      "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
-      $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
-  )
-
-  target_compile_options(
-    abseil_dll
-    PRIVATE
-      ${ABSL_DEFAULT_COPTS}
-  )
-
-  target_compile_definitions(
-    abseil_dll
-    PRIVATE
-      ABSL_BUILD_DLL
-      NOMINMAX
-    INTERFACE
-      ${ABSL_CC_LIB_DEFINES}
-  )
-  install(TARGETS abseil_dll EXPORT ${PROJECT_NAME}Targets
-        RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR}
-        LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR}
-        ARCHIVE DESTINATION ${ABSL_INSTALL_LIBDIR}
-  )
-endfunction()
diff --git a/third_party/abseil/CMake/AbseilHelpers.cmake b/third_party/abseil/CMake/AbseilHelpers.cmake
deleted file mode 100644
index e88507d..0000000
--- a/third_party/abseil/CMake/AbseilHelpers.cmake
+++ /dev/null
@@ -1,402 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-include(CMakeParseArguments)
-include(AbseilConfigureCopts)
-include(AbseilDll)
-include(AbseilInstallDirs)
-
-# The IDE folder for Abseil that will be used if Abseil is included in a CMake
-# project that sets
-#    set_property(GLOBAL PROPERTY USE_FOLDERS ON)
-# For example, Visual Studio supports folders.
-if(NOT DEFINED ABSL_IDE_FOLDER)
-  set(ABSL_IDE_FOLDER Abseil)
-endif()
-
-# absl_cc_library()
-#
-# CMake function to imitate Bazel's cc_library rule.
-#
-# Parameters:
-# NAME: name of target (see Note)
-# HDRS: List of public header files for the library
-# SRCS: List of source files for the library
-# DEPS: List of other libraries to be linked in to the binary targets
-# COPTS: List of private compile options
-# DEFINES: List of public defines
-# LINKOPTS: List of link options
-# PUBLIC: Add this so that this library will be exported under absl::
-# Also in IDE, target will appear in Abseil folder while non PUBLIC will be in Abseil/internal.
-# TESTONLY: When added, this target will only be built if user passes -DABSL_RUN_TESTS=ON to CMake.
-#
-# Note:
-# By default, absl_cc_library will always create a library named absl_${NAME},
-# and alias target absl::${NAME}.  The absl:: form should always be used.
-# This is to reduce namespace pollution.
-#
-# absl_cc_library(
-#   NAME
-#     awesome
-#   HDRS
-#     "a.h"
-#   SRCS
-#     "a.cc"
-# )
-# absl_cc_library(
-#   NAME
-#     fantastic_lib
-#   SRCS
-#     "b.cc"
-#   DEPS
-#     absl::awesome # not "awesome" !
-#   PUBLIC
-# )
-#
-# absl_cc_library(
-#   NAME
-#     main_lib
-#   ...
-#   DEPS
-#     absl::fantastic_lib
-# )
-#
-# TODO: Implement "ALWAYSLINK"
-function(absl_cc_library)
-  cmake_parse_arguments(ABSL_CC_LIB
-    "DISABLE_INSTALL;PUBLIC;TESTONLY"
-    "NAME"
-    "HDRS;SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
-    ${ARGN}
-  )
-
-  if(ABSL_CC_LIB_TESTONLY AND NOT ABSL_RUN_TESTS)
-    return()
-  endif()
-
-  if(ABSL_ENABLE_INSTALL)
-    set(_NAME "${ABSL_CC_LIB_NAME}")
-  else()
-    set(_NAME "absl_${ABSL_CC_LIB_NAME}")
-  endif()
-
-  # Check if this is a header-only library
-  # Note that as of February 2019, many popular OS's (for example, Ubuntu
-  # 16.04 LTS) only come with cmake 3.5 by default.  For this reason, we can't
-  # use list(FILTER...)
-  set(ABSL_CC_SRCS "${ABSL_CC_LIB_SRCS}")
-  foreach(src_file IN LISTS ABSL_CC_SRCS)
-    if(${src_file} MATCHES ".*\\.(h|inc)")
-      list(REMOVE_ITEM ABSL_CC_SRCS "${src_file}")
-    endif()
-  endforeach()
-
-  if("${ABSL_CC_SRCS}" STREQUAL "")
-    set(ABSL_CC_LIB_IS_INTERFACE 1)
-  else()
-    set(ABSL_CC_LIB_IS_INTERFACE 0)
-  endif()
-
-  # Determine this build target's relationship to the DLL. It's one of four things:
-  # 1. "dll"     -- This target is part of the DLL
-  # 2. "dll_dep" -- This target is not part of the DLL, but depends on the DLL.
-  #                 Note that we assume any target not in the DLL depends on the
-  #                 DLL. This is not a technical necessity but a convenience
-  #                 which happens to be true, because nearly every target is
-  #                 part of the DLL.
-  # 3. "shared"  -- This is a shared library, perhaps on a non-windows platform
-  #                 where DLL doesn't make sense.
-  # 4. "static"  -- This target does not depend on the DLL and should be built
-  #                 statically.
-  if (${ABSL_BUILD_DLL})
-    if(ABSL_ENABLE_INSTALL)
-      absl_internal_dll_contains(TARGET ${_NAME} OUTPUT _in_dll)
-    else()
-      absl_internal_dll_contains(TARGET ${ABSL_CC_LIB_NAME} OUTPUT _in_dll)
-    endif()
-    if (${_in_dll})
-      # This target should be replaced by the DLL
-      set(_build_type "dll")
-      set(ABSL_CC_LIB_IS_INTERFACE 1)
-    else()
-      # Building a DLL, but this target is not part of the DLL
-      set(_build_type "dll_dep")
-    endif()
-  elseif(BUILD_SHARED_LIBS)
-    set(_build_type "shared")
-  else()
-    set(_build_type "static")
-  endif()
-
-  # Generate a pkg-config file for every library:
-  if(${_build_type} STREQUAL "static" OR ${_build_type} STREQUAL "shared")
-    if(NOT ABSL_CC_LIB_TESTONLY)
-      if(absl_VERSION)
-        set(PC_VERSION "${absl_VERSION}")
-      else()
-        set(PC_VERSION "head")
-      endif()
-      foreach(dep ${ABSL_CC_LIB_DEPS})
-        if(${dep} MATCHES "^absl::(.*)")
-          set(PC_DEPS "${PC_DEPS} absl_${CMAKE_MATCH_1} = ${PC_VERSION}")
-        endif()
-      endforeach()
-      foreach(cflag ${ABSL_CC_LIB_COPTS})
-        if(${cflag} MATCHES "^(-Wno|/wd)")
-          # These flags are needed to suppress warnings that might fire in our headers.
-          set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
-        elseif(${cflag} MATCHES "^(-W|/w[1234eo])")
-          # Don't impose our warnings on others.
-        else()
-          set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
-        endif()
-      endforeach()
-      FILE(GENERATE OUTPUT "${CMAKE_BINARY_DIR}/lib/pkgconfig/absl_${_NAME}.pc" CONTENT "\
-prefix=${CMAKE_INSTALL_PREFIX}\n\
-exec_prefix=\${prefix}\n\
-libdir=\${prefix}/lib\n\
-includedir=\${prefix}/include\n\
-\n\
-Name: absl_${_NAME}\n\
-Description: Abseil ${_NAME} library\n\
-URL: https://abseil.io/\n\
-Version: ${PC_VERSION}\n\
-Requires.private:${PC_DEPS}\n\
-Libs: -L\${libdir} $<JOIN:${ABSL_CC_LIB_LINKOPTS}, > $<$<NOT:$<BOOL:${ABSL_CC_LIB_IS_INTERFACE}>>:-labsl_${_NAME}>\n\
-Cflags: -I\${includedir}${PC_CFLAGS}\n")
-      INSTALL(FILES "${CMAKE_BINARY_DIR}/lib/pkgconfig/absl_${_NAME}.pc"
-              DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
-    endif()
-  endif()
-
-  if(NOT ABSL_CC_LIB_IS_INTERFACE)
-    if(${_build_type} STREQUAL "dll_dep")
-      # This target depends on the DLL. When adding dependencies to this target,
-      # any depended-on-target which is contained inside the DLL is replaced
-      # with a dependency on the DLL.
-      add_library(${_NAME} STATIC "")
-      target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
-      absl_internal_dll_targets(
-        DEPS ${ABSL_CC_LIB_DEPS}
-        OUTPUT _dll_deps
-      )
-      target_link_libraries(${_NAME}
-        PUBLIC ${_dll_deps}
-        PRIVATE
-          ${ABSL_CC_LIB_LINKOPTS}
-          ${ABSL_DEFAULT_LINKOPTS}
-      )
-
-      if (ABSL_CC_LIB_TESTONLY)
-        set(_gtest_link_define "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-      else()
-        set(_gtest_link_define)
-      endif()
-
-      target_compile_definitions(${_NAME}
-        PUBLIC
-          ABSL_CONSUME_DLL
-          "${_gtest_link_define}"
-      )
-
-    elseif(${_build_type} STREQUAL "static" OR ${_build_type} STREQUAL "shared")
-      add_library(${_NAME} "")
-      target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
-      target_link_libraries(${_NAME}
-      PUBLIC ${ABSL_CC_LIB_DEPS}
-      PRIVATE
-        ${ABSL_CC_LIB_LINKOPTS}
-        ${ABSL_DEFAULT_LINKOPTS}
-      )
-    else()
-      message(FATAL_ERROR "Invalid build type: ${_build_type}")
-    endif()
-
-    # Linker language can be inferred from sources, but in the case of DLLs we
-    # don't have any .cc files so it would be ambiguous. We could set it
-    # explicitly only in the case of DLLs but, because "CXX" is always the
-    # correct linker language for static or for shared libraries, we set it
-    # unconditionally.
-    set_property(TARGET ${_NAME} PROPERTY LINKER_LANGUAGE "CXX")
-
-    target_include_directories(${_NAME}
-      PUBLIC
-        "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
-        $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
-    )
-    target_compile_options(${_NAME}
-      PRIVATE ${ABSL_CC_LIB_COPTS})
-    target_compile_definitions(${_NAME} PUBLIC ${ABSL_CC_LIB_DEFINES})
-
-    # Add all Abseil targets to a a folder in the IDE for organization.
-    if(ABSL_CC_LIB_PUBLIC)
-      set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
-    elseif(ABSL_CC_LIB_TESTONLY)
-      set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)
-    else()
-      set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/internal)
-    endif()
-
-    # INTERFACE libraries can't have the CXX_STANDARD property set
-    set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
-    set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
-
-    # When being installed, we lose the absl_ prefix.  We want to put it back
-    # to have properly named lib files.  This is a no-op when we are not being
-    # installed.
-    if(ABSL_ENABLE_INSTALL)
-      set_target_properties(${_NAME} PROPERTIES
-        OUTPUT_NAME "absl_${_NAME}"
-        # TODO(b/173696973): Figure out how to set SOVERSION for LTS releases.
-        SOVERSION 0
-      )
-    endif()
-  else()
-    # Generating header-only library
-    add_library(${_NAME} INTERFACE)
-    target_include_directories(${_NAME}
-      INTERFACE
-        "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>"
-        $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}>
-      )
-
-    if (${_build_type} STREQUAL "dll")
-        set(ABSL_CC_LIB_DEPS abseil_dll)
-    endif()
-
-    target_link_libraries(${_NAME}
-      INTERFACE
-        ${ABSL_CC_LIB_DEPS}
-        ${ABSL_CC_LIB_LINKOPTS}
-        ${ABSL_DEFAULT_LINKOPTS}
-    )
-    target_compile_definitions(${_NAME} INTERFACE ${ABSL_CC_LIB_DEFINES})
-  endif()
-
-  # TODO currently we don't install googletest alongside abseil sources, so
-  # installed abseil can't be tested.
-  if(NOT ABSL_CC_LIB_TESTONLY AND ABSL_ENABLE_INSTALL)
-    install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets
-          RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR}
-          LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR}
-          ARCHIVE DESTINATION ${ABSL_INSTALL_LIBDIR}
-    )
-  endif()
-
-    add_library(absl::${ABSL_CC_LIB_NAME} ALIAS ${_NAME})
-endfunction()
-
-# absl_cc_test()
-#
-# CMake function to imitate Bazel's cc_test rule.
-#
-# Parameters:
-# NAME: name of target (see Usage below)
-# SRCS: List of source files for the binary
-# DEPS: List of other libraries to be linked in to the binary targets
-# COPTS: List of private compile options
-# DEFINES: List of public defines
-# LINKOPTS: List of link options
-#
-# Note:
-# By default, absl_cc_test will always create a binary named absl_${NAME}.
-# This will also add it to ctest list as absl_${NAME}.
-#
-# Usage:
-# absl_cc_library(
-#   NAME
-#     awesome
-#   HDRS
-#     "a.h"
-#   SRCS
-#     "a.cc"
-#   PUBLIC
-# )
-#
-# absl_cc_test(
-#   NAME
-#     awesome_test
-#   SRCS
-#     "awesome_test.cc"
-#   DEPS
-#     absl::awesome
-#     gmock
-#     gtest_main
-# )
-function(absl_cc_test)
-  if(NOT ABSL_RUN_TESTS)
-    return()
-  endif()
-
-  cmake_parse_arguments(ABSL_CC_TEST
-    ""
-    "NAME"
-    "SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
-    ${ARGN}
-  )
-
-  set(_NAME "absl_${ABSL_CC_TEST_NAME}")
-
-  add_executable(${_NAME} "")
-  target_sources(${_NAME} PRIVATE ${ABSL_CC_TEST_SRCS})
-  target_include_directories(${_NAME}
-    PUBLIC ${ABSL_COMMON_INCLUDE_DIRS}
-    PRIVATE ${GMOCK_INCLUDE_DIRS} ${GTEST_INCLUDE_DIRS}
-  )
-
-  if (${ABSL_BUILD_DLL})
-    target_compile_definitions(${_NAME}
-      PUBLIC
-        ${ABSL_CC_TEST_DEFINES}
-        ABSL_CONSUME_DLL
-        GTEST_LINKED_AS_SHARED_LIBRARY=1
-    )
-
-    # Replace dependencies on targets inside the DLL with abseil_dll itself.
-    absl_internal_dll_targets(
-      DEPS ${ABSL_CC_TEST_DEPS}
-      OUTPUT ABSL_CC_TEST_DEPS
-    )
-  else()
-    target_compile_definitions(${_NAME}
-      PUBLIC
-        ${ABSL_CC_TEST_DEFINES}
-    )
-  endif()
-  target_compile_options(${_NAME}
-    PRIVATE ${ABSL_CC_TEST_COPTS}
-  )
-
-  target_link_libraries(${_NAME}
-    PUBLIC ${ABSL_CC_TEST_DEPS}
-    PRIVATE ${ABSL_CC_TEST_LINKOPTS}
-  )
-  # Add all Abseil targets to a folder in the IDE for organization.
-  set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test)
-
-  set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
-  set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
-
-  add_test(NAME ${_NAME} COMMAND ${_NAME})
-endfunction()
-
-
-function(check_target my_target)
-  if(NOT TARGET ${my_target})
-    message(FATAL_ERROR " ABSL: compiling absl requires a ${my_target} CMake target in your project,
-                   see CMake/README.md for more details")
-  endif(NOT TARGET ${my_target})
-endfunction()
diff --git a/third_party/abseil/CMake/AbseilInstallDirs.cmake b/third_party/abseil/CMake/AbseilInstallDirs.cmake
deleted file mode 100644
index 6fc914b..0000000
--- a/third_party/abseil/CMake/AbseilInstallDirs.cmake
+++ /dev/null
@@ -1,20 +0,0 @@
-include(GNUInstallDirs)
-
-# absl_VERSION is only set if we are an LTS release being installed, in which
-# case it may be into a system directory and so we need to make subdirectories
-# for each installed version of Abseil.  This mechanism is implemented in
-# Abseil's internal Copybara (https://github.com/google/copybara) workflows and
-# isn't visible in the CMake buildsystem itself.
-
-if(absl_VERSION)
-  set(ABSL_SUBDIR "${PROJECT_NAME}_${PROJECT_VERSION}")
-  set(ABSL_INSTALL_BINDIR "${CMAKE_INSTALL_BINDIR}/${ABSL_SUBDIR}")
-  set(ABSL_INSTALL_CONFIGDIR "${CMAKE_INSTALL_LIBDIR}/cmake/${ABSL_SUBDIR}")
-  set(ABSL_INSTALL_INCLUDEDIR "${CMAKE_INSTALL_INCLUDEDIR}/${ABSL_SUBDIR}")
-  set(ABSL_INSTALL_LIBDIR "${CMAKE_INSTALL_LIBDIR}/${ABSL_SUBDIR}")
-else()
-  set(ABSL_INSTALL_BINDIR "${CMAKE_INSTALL_BINDIR}")
-  set(ABSL_INSTALL_CONFIGDIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
-  set(ABSL_INSTALL_INCLUDEDIR "${CMAKE_INSTALL_INCLUDEDIR}")
-  set(ABSL_INSTALL_LIBDIR "${CMAKE_INSTALL_LIBDIR}")
-endif()
diff --git a/third_party/abseil/CMake/Googletest/CMakeLists.txt.in b/third_party/abseil/CMake/Googletest/CMakeLists.txt.in
deleted file mode 100644
index 5769e3a..0000000
--- a/third_party/abseil/CMake/Googletest/CMakeLists.txt.in
+++ /dev/null
@@ -1,14 +0,0 @@
-cmake_minimum_required(VERSION 2.8.2)
-
-project(googletest-external NONE)
-
-include(ExternalProject)
-ExternalProject_Add(googletest
-  URL               "${absl_gtest_download_url}"  # May be empty
-  SOURCE_DIR        "${absl_gtest_src_dir}"
-  BINARY_DIR        "${absl_gtest_build_dir}"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/third_party/abseil/CMake/Googletest/DownloadGTest.cmake b/third_party/abseil/CMake/Googletest/DownloadGTest.cmake
deleted file mode 100644
index 9d071c9..0000000
--- a/third_party/abseil/CMake/Googletest/DownloadGTest.cmake
+++ /dev/null
@@ -1,41 +0,0 @@
-# Integrates googletest at configure time.  Based on the instructions at
-# https://github.com/google/googletest/tree/master/googletest#incorporating-into-an-existing-cmake-project
-
-# Set up the external googletest project, downloading the latest from Github
-# master if requested.
-configure_file(
-  ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in
-  ${CMAKE_BINARY_DIR}/googletest-external/CMakeLists.txt
-)
-
-set(ABSL_SAVE_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
-set(ABSL_SAVE_CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
-if (BUILD_SHARED_LIBS)
-  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGTEST_CREATE_SHARED_LIBRARY=1")
-endif()
-
-# Configure and build the googletest source.
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-external )
-if(result)
-  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-external)
-if(result)
-  message(FATAL_ERROR "Build step for googletest failed: ${result}")
-endif()
-
-set(CMAKE_CXX_FLAGS ${ABSL_SAVE_CMAKE_CXX_FLAGS})
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${ABSL_SAVE_CMAKE_RUNTIME_OUTPUT_DIRECTORY})
-
-# Prevent overriding the parent project's compiler/linker settings on Windows
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-# Add googletest directly to our build. This defines the gtest and gtest_main
-# targets.
-add_subdirectory(${absl_gtest_src_dir} ${absl_gtest_build_dir} EXCLUDE_FROM_ALL)
diff --git a/third_party/abseil/CMake/README.md b/third_party/abseil/CMake/README.md
deleted file mode 100644
index 8f73475..0000000
--- a/third_party/abseil/CMake/README.md
+++ /dev/null
@@ -1,101 +0,0 @@
-# Abseil CMake Build Instructions
-
-Abseil comes with a CMake build script ([CMakeLists.txt](../CMakeLists.txt))
-that can be used on a wide range of platforms ("C" stands for cross-platform.).
-If you don't have CMake installed already, you can download it for free from
-<https://www.cmake.org/>.
-
-CMake works by generating native makefiles or build projects that can
-be used in the compiler environment of your choice.
-
-For API/ABI compatibility reasons, we strongly recommend building Abseil in a
-subdirectory of your project or as an embedded dependency.
-
-## Incorporating Abseil Into a CMake Project
-
-The recommendations below are similar to those for using CMake within the
-googletest framework
-(<https://github.com/google/googletest/blob/master/googletest/README.md#incorporating-into-an-existing-cmake-project>)
-
-### Step-by-Step Instructions
-
-1. If you want to build the Abseil tests, integrate the Abseil dependency
-[Google Test](https://github.com/google/googletest) into your CMake project. To disable Abseil tests, you have to pass
-`-DBUILD_TESTING=OFF` when configuring your project with CMake.
-
-2. Download Abseil and copy it into a subdirectory in your CMake project or add
-Abseil as a [git submodule](https://git-scm.com/docs/git-submodule) in your
-CMake project.
-
-3. You can then use the CMake command
-[`add_subdirectory()`](https://cmake.org/cmake/help/latest/command/add_subdirectory.html)
-to include Abseil directly in your CMake project.
-
-4. Add the **absl::** target you wish to use to the
-[`target_link_libraries()`](https://cmake.org/cmake/help/latest/command/target_link_libraries.html)
-section of your executable or of your library.<br>
-Here is a short CMakeLists.txt example of a project file using Abseil.
-
-```cmake
-cmake_minimum_required(VERSION 3.5)
-project(my_project)
-
-# Pick the C++ standard to compile with.
-# Abseil currently supports C++11, C++14, and C++17.
-set(CMAKE_CXX_STANDARD 11)
-
-add_subdirectory(abseil-cpp)
-
-add_executable(my_exe source.cpp)
-target_link_libraries(my_exe absl::base absl::synchronization absl::strings)
-```
-
-### Running Abseil Tests with CMake
-
-Use the `-DABSL_RUN_TESTS=ON` flag to run Abseil tests.  Note that if the `-DBUILD_TESTING=OFF` flag is passed then Abseil tests will not be run.
-
-You will need to provide Abseil with a Googletest dependency.  There are two
-options for how to do this:
-
-* Use `-DABSL_USE_GOOGLETEST_HEAD`.  This will automatically download the latest
-Googletest source into the build directory at configure time.  Googletest will
-then be compiled directly alongside Abseil's tests.
-* Manually integrate Googletest with your build.  See
-https://github.com/google/googletest/blob/master/googletest/README.md#using-cmake
-for more information on using Googletest in a CMake project.
-
-For example, to run just the Abseil tests, you could use this script:
-
-```
-cd path/to/abseil-cpp
-mkdir build
-cd build
-cmake -DABSL_USE_GOOGLETEST_HEAD=ON -DABSL_RUN_TESTS=ON ..
-make -j
-ctest
-```
-
-Currently, we only run our tests with CMake in a Linux environment, but we are
-working on the rest of our supported platforms. See
-https://github.com/abseil/abseil-cpp/projects/1 and
-https://github.com/abseil/abseil-cpp/issues/109 for more information.
-
-### Available Abseil CMake Public Targets
-
-Here's a non-exhaustive list of Abseil CMake public targets:
-
-```cmake
-absl::algorithm
-absl::base
-absl::debugging
-absl::flat_hash_map
-absl::flags
-absl::memory
-absl::meta
-absl::numeric
-absl::random_random
-absl::strings
-absl::synchronization
-absl::time
-absl::utility
-```
diff --git a/third_party/abseil/CMake/abslConfig.cmake.in b/third_party/abseil/CMake/abslConfig.cmake.in
deleted file mode 100644
index 62d246d..0000000
--- a/third_party/abseil/CMake/abslConfig.cmake.in
+++ /dev/null
@@ -1,8 +0,0 @@
-# absl CMake configuration file.
-
-include(CMakeFindDependencyMacro)
-find_dependency(Threads)
-
-@PACKAGE_INIT@
-
-include ("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
diff --git a/third_party/abseil/CMake/install_test_project/CMakeLists.txt b/third_party/abseil/CMake/install_test_project/CMakeLists.txt
deleted file mode 100644
index 06b797e..0000000
--- a/third_party/abseil/CMake/install_test_project/CMakeLists.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# A simple CMakeLists.txt for testing cmake installation
-
-cmake_minimum_required(VERSION 3.5)
-project(absl_cmake_testing CXX)
-
-set(CMAKE_CXX_STANDARD 11)
-
-add_executable(simple simple.cc)
-
-find_package(absl REQUIRED)
-
-target_link_libraries(simple absl::strings)
diff --git a/third_party/abseil/CMake/install_test_project/simple.cc b/third_party/abseil/CMake/install_test_project/simple.cc
deleted file mode 100644
index e9e3529..0000000
--- a/third_party/abseil/CMake/install_test_project/simple.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <iostream>
-#include "absl/strings/substitute.h"
-
-int main(int argc, char** argv) {
-  for (int i = 0; i < argc; ++i) {
-    std::cout << absl::Substitute("Arg $0: $1\n", i, argv[i]);
-  }
-}
diff --git a/third_party/abseil/CMake/install_test_project/test.sh b/third_party/abseil/CMake/install_test_project/test.sh
deleted file mode 100755
index ddc7726..0000000
--- a/third_party/abseil/CMake/install_test_project/test.sh
+++ /dev/null
@@ -1,162 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# "Unit" and integration tests for Absl CMake installation
-
-# TODO(absl-team): This script isn't fully hermetic because
-# -DABSL_USE_GOOGLETEST_HEAD=ON means that this script isn't pinned to a fixed
-# version of GoogleTest. This means that an upstream change to GoogleTest could
-# break this test. Fix this by allowing this script to pin to a known-good
-# version of GoogleTest.
-
-# Fail on any error. Treat unset variables an error. Print commands as executed.
-set -euox pipefail
-
-install_absl() {
-  pushd "${absl_build_dir}"
-  if [[ "${#}" -eq 1 ]]; then
-    cmake -DCMAKE_INSTALL_PREFIX="${1}" "${absl_dir}"
-  else
-    cmake "${absl_dir}"
-  fi
-  cmake --build . --target install -- -j
-  popd
-}
-
-uninstall_absl() {
-  xargs rm < "${absl_build_dir}"/install_manifest.txt
-  rm -rf "${absl_build_dir}"
-  mkdir -p "${absl_build_dir}"
-}
-
-lts_install=""
-
-while getopts ":l" lts; do
-  case "${lts}" in
-    l )
-      lts_install="true"
-      ;;
-  esac
-done
-
-absl_dir=/abseil-cpp
-absl_build_dir=/buildfs/absl-build
-project_dir="${absl_dir}"/CMake/install_test_project
-project_build_dir=/buildfs/project-build
-
-mkdir -p "${absl_build_dir}"
-mkdir -p "${project_build_dir}"
-
-if [[ "${lts_install}" ]]; then
-  install_dir="/usr/local"
-else
-  install_dir="${project_build_dir}"/install
-fi
-mkdir -p "${install_dir}"
-
-# Test build, install, and link against installed abseil
-pushd "${project_build_dir}"
-if [[ "${lts_install}" ]]; then
-  install_absl
-  cmake "${project_dir}"
-else
-  install_absl "${install_dir}"
-  cmake "${project_dir}" -DCMAKE_PREFIX_PATH="${install_dir}"
-fi
-
-cmake --build . --target simple
-
-output="$(${project_build_dir}/simple "printme" 2>&1)"
-if [[ "${output}" != *"Arg 1: printme"* ]]; then
-  echo "Faulty output on simple project:"
-  echo "${output}"
-  exit 1
-fi
-
-popd
-
-# Test that we haven't accidentally made absl::abslblah
-pushd "${install_dir}"
-
-# Starting in CMake 3.12 the default install dir is lib$bit_width
-if [[ -d lib64 ]]; then
-  libdir="lib64"
-elif [[ -d lib ]]; then
-  libdir="lib"
-else
-  echo "ls *, */*, */*/*:"
-  ls *
-  ls */*
-  ls */*/*
-  echo "unknown lib dir"
-fi
-
-if [[ "${lts_install}" ]]; then
-  # LTS versions append the date of the release to the subdir.
-  # 9999/99/99 is the dummy date used in the local_lts workflow.
-  absl_subdir="absl_99999999"
-else
-  absl_subdir="absl"
-fi
-
-if ! grep absl::strings "${libdir}/cmake/${absl_subdir}/abslTargets.cmake"; then
-  cat "${libdir}"/cmake/absl/abslTargets.cmake
-  echo "CMake targets named incorrectly"
-  exit 1
-fi
-
-pushd "${HOME}"
-cat > hello-abseil.cc << EOF
-#include <cstdlib>
-
-#include "absl/strings/str_format.h"
-
-int main(int argc, char **argv) {
-  absl::PrintF("Hello Abseil!\n");
-  return EXIT_SUCCESS;
-}
-EOF
-export PKG_CONFIG_PATH="${install_dir}/${libdir}/pkgconfig"
-pc_args=($(pkg-config --cflags --libs --static absl_str_format))
-g++ -static -o hello-abseil hello-abseil.cc "${pc_args[@]}"
-hello="$(./hello-abseil)"
-[[ "${hello}" == "Hello Abseil!" ]]
-popd
-
-uninstall_absl
-popd
-
-if [[ ! "${lts_install}" ]]; then
-  # Test that we warn if installed without a prefix or a system prefix
-  output="$(install_absl 2>&1)"
-  if [[ "${output}" != *"Please set CMAKE_INSTALL_PREFIX"* ]]; then
-    echo "Install without prefix didn't warn as expected. Output:"
-    echo "${output}"
-    exit 1
-  fi
-  uninstall_absl
-
-  output="$(install_absl /usr 2>&1)"
-  if [[ "${output}" != *"Please set CMAKE_INSTALL_PREFIX"* ]]; then
-    echo "Install with /usr didn't warn as expected. Output:"
-    echo "${output}"
-    exit 1
-  fi
-  uninstall_absl
-fi
-
-echo "Install test complete!"
-exit 0
diff --git a/third_party/abseil/CMakeLists.txt b/third_party/abseil/CMakeLists.txt
deleted file mode 100644
index c1ae8d5..0000000
--- a/third_party/abseil/CMakeLists.txt
+++ /dev/null
@@ -1,197 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Most widely used distributions have cmake 3.5 or greater available as of March
-# 2019.  A notable exception is RHEL-7 (CentOS7).  You can install a current
-# version of CMake by first installing Extra Packages for Enterprise Linux
-# (https://fedoraproject.org/wiki/EPEL#Extra_Packages_for_Enterprise_Linux_.28EPEL.29)
-# and then issuing `yum install cmake3` on the command line.
-cmake_minimum_required(VERSION 3.5)
-
-# Compiler id for Apple Clang is now AppleClang.
-if (POLICY CMP0025)
-  cmake_policy(SET CMP0025 NEW)
-endif (POLICY CMP0025)
-
-# if command can use IN_LIST
-if (POLICY CMP0057)
-  cmake_policy(SET CMP0057 NEW)
-endif (POLICY CMP0057)
-
-# Project version variables are the empty string if version is unspecified
-if (POLICY CMP0048)
-  cmake_policy(SET CMP0048 NEW)
-endif (POLICY CMP0048)
-
-# option() honor variables
-if (POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif (POLICY CMP0077)
-
-project(absl CXX)
-
-# Output directory is correct by default for most build setups. However, when
-# building Abseil as a DLL, it is important to have the DLL in the same
-# directory as the executable using it. Thus, we put all executables in a single
-# /bin directory.
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-
-# when absl is included as subproject (i.e. using add_subdirectory(abseil-cpp))
-# in the source tree of a project that uses it, install rules are disabled.
-if(NOT "^${CMAKE_SOURCE_DIR}$" STREQUAL "^${PROJECT_SOURCE_DIR}$")
-  option(ABSL_ENABLE_INSTALL "Enable install rule" OFF)
-else()
-  option(ABSL_ENABLE_INSTALL "Enable install rule" ON)
-endif()
-
-list(APPEND CMAKE_MODULE_PATH
-  ${CMAKE_CURRENT_LIST_DIR}/CMake
-  ${CMAKE_CURRENT_LIST_DIR}/absl/copts
-)
-
-include(AbseilInstallDirs)
-include(CMakePackageConfigHelpers)
-include(AbseilDll)
-include(AbseilHelpers)
-
-
-##
-## Using absl targets
-##
-## all public absl targets are
-## exported with the absl:: prefix
-##
-## e.g absl::base absl::synchronization absl::strings ....
-##
-## DO NOT rely on the internal targets outside of the prefix
-
-
-# include current path
-list(APPEND ABSL_COMMON_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR})
-
-if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-  set(ABSL_USING_CLANG ON)
-else()
-  set(ABSL_USING_CLANG OFF)
-endif()
-
-# find dependencies
-## pthread
-find_package(Threads REQUIRED)
-
-option(ABSL_USE_EXTERNAL_GOOGLETEST
-  "If ON, Abseil will assume that the targets for GoogleTest are already provided by the including project. This makes sense when Abseil is used with add_subproject." OFF)
-
-option(ABSL_USE_GOOGLETEST_HEAD
-  "If ON, abseil will download HEAD from GoogleTest at config time." OFF)
-
-set(ABSL_GOOGLETEST_DOWNLOAD_URL "" CACHE STRING "If set, download GoogleTest from this URL")
-
-set(ABSL_LOCAL_GOOGLETEST_DIR "/usr/src/googletest" CACHE PATH
-  "If ABSL_USE_GOOGLETEST_HEAD is OFF and ABSL_GOOGLETEST_URL is not set, specifies the directory of a local GoogleTest checkout."
-  )
-
-option(ABSL_RUN_TESTS "If ON, Abseil tests will be run." OFF)
-
-if(${ABSL_RUN_TESTS})
-  # enable CTest.  This will set BUILD_TESTING to ON unless otherwise specified
-  # on the command line
-  include(CTest)
-
-  ## check targets
-  if (NOT ABSL_USE_EXTERNAL_GOOGLETEST)
-    set(absl_gtest_build_dir ${CMAKE_BINARY_DIR}/googletest-build)
-    if(ABSL_USE_GOOGLETEST_HEAD AND ABSL_GOOGLETEST_DOWNLOAD_URL)
-      message(FATAL_ERROR "Do not set both ABSL_USE_GOOGLETEST_HEAD and ABSL_GOOGLETEST_DOWNLOAD_URL")
-    endif()
-    if(ABSL_USE_GOOGLETEST_HEAD)
-      set(absl_gtest_download_url "https://github.com/google/googletest/archive/master.zip")
-    elseif(ABSL_GOOGLETEST_DOWNLOAD_URL)
-      set(absl_gtest_download_url ${ABSL_GOOGLETEST_DOWNLOAD_URL})
-    endif()
-    if(absl_gtest_download_url)
-      set(absl_gtest_src_dir ${CMAKE_BINARY_DIR}/googletest-src)
-    else()
-      set(absl_gtest_src_dir ${ABSL_LOCAL_GOOGLETEST_DIR})
-    endif()
-    include(CMake/Googletest/DownloadGTest.cmake)
-  endif()
-
-  check_target(gtest)
-  check_target(gtest_main)
-  check_target(gmock)
-
-  list(APPEND ABSL_TEST_COMMON_LIBRARIES
-    gtest_main
-    gtest
-    gmock
-    ${CMAKE_THREAD_LIBS_INIT}
-  )
-endif()
-
-add_subdirectory(absl)
-
-if(ABSL_ENABLE_INSTALL)
-  # absl:lts-remove-begin(system installation is supported for LTS releases)
-  # We don't support system-wide installation
-  list(APPEND SYSTEM_INSTALL_DIRS "/usr/local" "/usr" "/opt/" "/opt/local" "c:/Program Files/${PROJECT_NAME}")
-  if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX IN_LIST SYSTEM_INSTALL_DIRS)
-    message(WARNING "\
-  The default and system-level install directories are unsupported except in LTS \
-  releases of Abseil.  Please set CMAKE_INSTALL_PREFIX to install Abseil in your \
-  source or build tree directly.\
-    ")
-  endif()
-  # absl:lts-remove-end
-
-  # install as a subdirectory only
-  install(EXPORT ${PROJECT_NAME}Targets
-    NAMESPACE absl::
-    DESTINATION "${ABSL_INSTALL_CONFIGDIR}"
-  )
-
-  configure_package_config_file(
-    CMake/abslConfig.cmake.in
-    "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
-    INSTALL_DESTINATION "${ABSL_INSTALL_CONFIGDIR}"
-  )
-  install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
-    DESTINATION "${ABSL_INSTALL_CONFIGDIR}"
-  )
-
-  # Abseil only has a version in LTS releases.  This mechanism is accomplished
-  # Abseil's internal Copybara (https://github.com/google/copybara) workflows and
-  # isn't visible in the CMake buildsystem itself.
-  if(absl_VERSION)
-    write_basic_package_version_file(
-      "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
-      COMPATIBILITY ExactVersion
-    )
-
-    install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
-      DESTINATION ${ABSL_INSTALL_CONFIGDIR}
-    )
-  endif()  # absl_VERSION
-
-  install(DIRECTORY absl
-    DESTINATION ${ABSL_INSTALL_INCLUDEDIR}
-    FILES_MATCHING
-      PATTERN "*.inc"
-      PATTERN "*.h"
-      PATTERN "copts" EXCLUDE
-      PATTERN "testdata" EXCLUDE
-    )
-endif()  # ABSL_ENABLE_INSTALL
diff --git a/third_party/abseil/CONTRIBUTING.md b/third_party/abseil/CONTRIBUTING.md
deleted file mode 100644
index 9dadae9..0000000
--- a/third_party/abseil/CONTRIBUTING.md
+++ /dev/null
@@ -1,141 +0,0 @@
-# How to Contribute to Abseil
-
-We'd love to accept your patches and contributions to this project. There are
-just a few small guidelines you need to follow.
-
-NOTE: If you are new to GitHub, please start by reading [Pull Request
-howto](https://help.github.com/articles/about-pull-requests/)
-
-## Contributor License Agreement
-
-Contributions to this project must be accompanied by a Contributor License
-Agreement. You (or your employer) retain the copyright to your contribution,
-this simply gives us permission to use and redistribute your contributions as
-part of the project. Head over to <https://cla.developers.google.com/> to see
-your current agreements on file or to sign a new one.
-
-You generally only need to submit a CLA once, so if you've already submitted one
-(even if it was for a different project), you probably don't need to do it
-again.
-
-## Contribution Guidelines
-
-Potential contributors sometimes ask us if the Abseil project is the appropriate
-home for their utility library code or for specific functions implementing
-missing portions of the standard. Often, the answer to this question is "no".
-We’d like to articulate our thinking on this issue so that our choices can be
-understood by everyone and so that contributors can have a better intuition
-about whether Abseil might be interested in adopting a new library.
-
-### Priorities
-
-Although our mission is to augment the C++ standard library, our goal is not to
-provide a full forward-compatible implementation of the latest standard. For us
-to consider a library for inclusion in Abseil, it is not enough that a library
-is useful. We generally choose to release a library when it meets at least one
-of the following criteria:
-
-*   **Widespread usage** - Using our internal codebase to help gauge usage, most
-    of the libraries we've released have tens of thousands of users.
-*   **Anticipated widespread usage** - Pre-adoption of some standard-compliant
-    APIs may not have broad adoption initially but can be expected to pick up
-    usage when it replaces legacy APIs. `absl::from_chars`, for example,
-    replaces existing code that converts strings to numbers and will therefore
-    likely see usage growth.
-*   **High impact** - APIs that provide a key solution to a specific problem,
-    such as `absl::FixedArray`, have higher impact than usage numbers may signal
-    and are released because of their importance.
-*   **Direct support for a library that falls under one of the above** - When we
-    want access to a smaller library as an implementation detail for a
-    higher-priority library we plan to release, we may release it, as we did
-    with portions of `absl/meta/type_traits.h`. One consequence of this is that
-    the presence of a library in Abseil does not necessarily mean that other
-    similar libraries would be a high priority.
-
-### API Freeze Consequences
-
-Via the
-[Abseil Compatibility Guidelines](https://abseil.io/about/compatibility), we
-have promised a large degree of API stability. In particular, we will not make
-backward-incompatible changes to released APIs without also shipping a tool or
-process that can upgrade our users' code. We are not yet at the point of easily
-releasing such tools. Therefore, at this time, shipping a library establishes an
-API contract which is borderline unchangeable. (We can add new functionality,
-but we cannot easily change existing behavior.) This constraint forces us to
-very carefully review all APIs that we ship.
-
-
-## Coding Style
-
-To keep the source consistent, readable, diffable and easy to merge, we use a
-fairly rigid coding style, as defined by the
-[google-styleguide](https://github.com/google/styleguide) project. All patches
-will be expected to conform to the style outlined
-[here](https://google.github.io/styleguide/cppguide.html).
-
-## Guidelines for Pull Requests
-
-*   If you are a Googler, it is preferable to first create an internal CL and
-    have it reviewed and submitted. The code propagation process will deliver
-    the change to GitHub.
-
-*   Create **small PRs** that are narrowly focused on **addressing a single
-    concern**. We often receive PRs that are trying to fix several things at a
-    time, but if only one fix is considered acceptable, nothing gets merged and
-    both author's & review's time is wasted. Create more PRs to address
-    different concerns and everyone will be happy.
-
-*   For speculative changes, consider opening an [Abseil
-    issue](https://github.com/abseil/abseil-cpp/issues) and discussing it first.
-    If you are suggesting a behavioral or API change, consider starting with an
-    [Abseil proposal template](ABSEIL_ISSUE_TEMPLATE.md).
-
-*   Provide a good **PR description** as a record of **what** change is being
-    made and **why** it was made. Link to a GitHub issue if it exists.
-
-*   Don't fix code style and formatting unless you are already changing that
-    line to address an issue. Formatting of modified lines may be done using
-   `git clang-format`. PRs with irrelevant changes won't be merged. If
-    you do want to fix formatting or style, do that in a separate PR.
-
-*   Unless your PR is trivial, you should expect there will be reviewer comments
-    that you'll need to address before merging. We expect you to be reasonably
-    responsive to those comments, otherwise the PR will be closed after 2-3
-    weeks of inactivity.
-
-*   Maintain **clean commit history** and use **meaningful commit messages**.
-    PRs with messy commit history are difficult to review and won't be merged.
-    Use `rebase -i upstream/master` to curate your commit history and/or to
-    bring in latest changes from master (but avoid rebasing in the middle of a
-    code review).
-
-*   Keep your PR up to date with upstream/master (if there are merge conflicts,
-    we can't really merge your change).
-
-*   **All tests need to be passing** before your change can be merged. We
-    recommend you **run tests locally** (see below)
-
-*   Exceptions to the rules can be made if there's a compelling reason for doing
-    so. That is - the rules are here to serve us, not the other way around, and
-    the rules need to be serving their intended purpose to be valuable.
-
-*   All submissions, including submissions by project members, require review.
-
-## Running Tests
-
-If you have [Bazel](https://bazel.build/) installed, use `bazel test
---test_tag_filters="-benchmark" ...` to run the unit tests.
-
-If you are running the Linux operating system and have
-[Docker](https://www.docker.com/) installed, you can also run the `linux_*.sh`
-scripts under the `ci/`(https://github.com/abseil/abseil-cpp/tree/master/ci)
-directory to test Abseil under a variety of conditions.
-
-## Abseil Committers
-
-The current members of the Abseil engineering team are the only committers at
-present.
-
-## Release Process
-
-Abseil lives at head, where latest-and-greatest code can be found.
diff --git a/third_party/abseil/FAQ.md b/third_party/abseil/FAQ.md
deleted file mode 100644
index 78028fc..0000000
--- a/third_party/abseil/FAQ.md
+++ /dev/null
@@ -1,164 +0,0 @@
-# Abseil FAQ
-
-## Is Abseil the right home for my utility library?
-
-Most often the answer to the question is "no." As both the [About
-Abseil](https://abseil.io/about/) page and our [contributing
-guidelines](https://github.com/abseil/abseil-cpp/blob/master/CONTRIBUTING.md#contribution-guidelines)
-explain, Abseil contains a variety of core C++ library code that is widely used
-at [Google](https://www.google.com/). As such, Abseil's primary purpose is to be
-used as a dependency by Google's open source C++ projects. While we do hope that
-Abseil is also useful to the C++ community at large, this added constraint also
-means that we are unlikely to accept a contribution of utility code that isn't
-already widely used by Google.
-
-## How to I set the C++ dialect used to build Abseil?
-
-The short answer is that whatever mechanism you choose, you need to make sure
-that you set this option consistently at the global level for your entire
-project. If, for example, you want to set the C++ dialect to C++17, with
-[Bazel](https://bazel/build/) as the build system and `gcc` or `clang` as the
-compiler, there several ways to do this:
-* Pass `--cxxopt=-std=c++17` on the command line (for example, `bazel build
-  --cxxopt=-std=c++17 ...`)
-* Set the environment variable `BAZEL_CXXOPTS` (for example,
-  `BAZEL_CXXOPTS=-std=c++17`)
-* Add `build --cxxopt=-std=c++17` to your [`.bazelrc`
-  file](https://docs.bazel.build/versions/master/guide.html#bazelrc)
-
-If you are using CMake as the build system, you'll need to add a line like
-`set(CMAKE_CXX_STANDARD 17)` to your top level `CMakeLists.txt` file. See the
-[CMake build
-instructions](https://github.com/abseil/abseil-cpp/blob/master/CMake/README.md)
-for more information.
-
-For a longer answer to this question and to understand why some other approaches
-don't work, see the answer to ["What is ABI and why don't you recommend using a
-pre-compiled version of
-Abseil?"](#what-is-abi-and-why-dont-you-recommend-using-a-pre-compiled-version-of-abseil)
-
-## What is ABI and why don't you recommend using a pre-compiled version of Abseil?
-
-For the purposes of this discussion, you can think of
-[ABI](https://en.wikipedia.org/wiki/Application_binary_interface) as the
-compiled representation of the interfaces in code. This is in contrast to
-[API](https://en.wikipedia.org/wiki/Application_programming_interface), which
-you can think of as the interfaces as defined by the code itself. [Abseil has a
-strong promise of API compatibility, but does not make any promise of ABI
-compatibility](https://abseil.io/about/compatibility). Let's take a look at what
-this means in practice.
-
-You might be tempted to do something like this in a
-[Bazel](https://bazel.build/) `BUILD` file:
-
-```
-# DON'T DO THIS!!!
-cc_library(
-    name = "my_library",
-    srcs = ["my_library.cc"],
-    copts = ["-std=c++17"],  # May create a mixed-mode compile!
-    deps = ["@com_google_absl//absl/strings"],
-)
-```
-
-Applying `-std=c++17` to an individual target in your `BUILD` file is going to
-compile that specific target in C++17 mode, but it isn't going to ensure the
-Abseil library is built in C++17 mode, since the Abseil library itself is a
-different build target. If your code includes an Abseil header, then your
-program may contain conflicting definitions of the same
-class/function/variable/enum, etc. As a rule, all compile options that affect
-the ABI of a program need to be applied to the entire build on a global basis.
-
-C++ has something called the [One Definition
-Rule](https://en.wikipedia.org/wiki/One_Definition_Rule) (ODR). C++ doesn't
-allow multiple definitions of the same class/function/variable/enum, etc. ODR
-violations sometimes result in linker errors, but linkers do not always catch
-violations. Uncaught ODR violations can result in strange runtime behaviors or
-crashes that can be hard to debug.
-
-If you build the Abseil library and your code using different compile options
-that affect ABI, there is a good chance you will run afoul of the One Definition
-Rule. Examples of GCC compile options that affect ABI include (but aren't
-limited to) language dialect (e.g. `-std=`), optimization level (e.g. `-O2`),
-code generation flags (e.g. `-fexceptions`), and preprocessor defines
-(e.g. `-DNDEBUG`).
-
-If you use a pre-compiled version of Abseil, (for example, from your Linux
-distribution package manager or from something like
-[vcpkg](https://github.com/microsoft/vcpkg)) you have to be very careful to
-ensure ABI compatibility across the components of your program. The only way you
-can be sure your program is going to be correct regarding ABI is to ensure
-you've used the exact same compile options as were used to build the
-pre-compiled library. This does not mean that Abseil cannot work as part of a
-Linux distribution since a knowledgeable binary packager will have ensured that
-all packages have been built with consistent compile options. This is one of the
-reasons we warn against - though do not outright reject - using Abseil as a
-pre-compiled library.
-
-Another possible way that you might afoul of ABI issues is if you accidentally
-include two versions of Abseil in your program. Multiple versions of Abseil can
-end up within the same binary if your program uses the Abseil library and
-another library also transitively depends on Abseil (resulting in what is
-sometimes called the diamond dependency problem). In cases such as this you must
-structure your build so that all libraries use the same version of Abseil.
-[Abseil's strong promise of API compatibility between
-releases](https://abseil.io/about/compatibility) means the latest "HEAD" release
-of Abseil is almost certainly the right choice if you are doing as we recommend
-and building all of your code from source.
-
-For these reasons we recommend you avoid pre-compiled code and build the Abseil
-library yourself in a consistent manner with the rest of your code.
-
-## What is "live at head" and how do I do it?
-
-From Abseil's point-of-view, "live at head" means that every Abseil source
-release (which happens on an almost daily basis) is either API compatible with
-the previous release, or comes with an automated tool that you can run over code
-to make it compatible. In practice, the need to use an automated tool is
-extremely rare. This means that upgrading from one source release to another
-should be a routine practice that can and should be performed often.
-
-We recommend you update to the [latest commit in the `master` branch of
-Abseil](https://github.com/abseil/abseil-cpp/commits/master) as often as
-possible. Not only will you pick up bug fixes more quickly, but if you have good
-automated testing, you will catch and be able to fix any [Hyrum's
-Law](https://www.hyrumslaw.com/) dependency problems on an incremental basis
-instead of being overwhelmed by them and having difficulty isolating them if you
-wait longer between updates.
-
-If you are using the [Bazel](https://bazel.build/) build system and its
-[external dependencies](https://docs.bazel.build/versions/master/external.html)
-feature, updating the
-[`http_archive`](https://docs.bazel.build/versions/master/repo/http.html#http_archive)
-rule in your
-[`WORKSPACE`](https://docs.bazel.build/versions/master/be/workspace.html) for
-`com_google_abseil` to point to the [latest commit in the `master` branch of
-Abseil](https://github.com/abseil/abseil-cpp/commits/master) is all you need to
-do. For example, on February 11, 2020, the latest commit to the master branch
-was `98eb410c93ad059f9bba1bf43f5bb916fc92a5ea`. To update to this commit, you
-would add the following snippet to your `WORKSPACE` file:
-
-```
-http_archive(
-  name = "com_google_absl",
-  urls = ["https://github.com/abseil/abseil-cpp/archive/98eb410c93ad059f9bba1bf43f5bb916fc92a5ea.zip"],  # 2020-02-11T18:50:53Z
-  strip_prefix = "abseil-cpp-98eb410c93ad059f9bba1bf43f5bb916fc92a5ea",
-  sha256 = "aabf6c57e3834f8dc3873a927f37eaf69975d4b28117fc7427dfb1c661542a87",
-)
-```
-
-To get the `sha256` of this URL, run `curl -sL --output -
-https://github.com/abseil/abseil-cpp/archive/98eb410c93ad059f9bba1bf43f5bb916fc92a5ea.zip
-| sha256sum -`.
-
-You can commit the updated `WORKSPACE` file to your source control every time
-you update, and if you have good automated testing, you might even consider
-automating this.
-
-One thing we don't recommend is using GitHub's `master.zip` files (for example
-[https://github.com/abseil/abseil-cpp/archive/master.zip](https://github.com/abseil/abseil-cpp/archive/master.zip)),
-which are always the latest commit in the `master` branch, to implement live at
-head. Since these `master.zip` URLs are not versioned, you will lose build
-reproducibility. In addition, some build systems, including Bazel, will simply
-cache this file, which means you won't actually be updating to the latest
-release until your cache is cleared or invalidated.
diff --git a/third_party/abseil/LICENSE b/third_party/abseil/LICENSE
deleted file mode 100644
index ccd61dc..0000000
--- a/third_party/abseil/LICENSE
+++ /dev/null
@@ -1,203 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        https://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
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-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
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-   6. Trademarks. This License does not grant permission to use the trade
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-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
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-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
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-   Copyright [yyyy] [name of copyright owner]
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-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
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-       https://www.apache.org/licenses/LICENSE-2.0
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-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
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-   See the License for the specific language governing permissions and
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diff --git a/third_party/abseil/LTS.md b/third_party/abseil/LTS.md
deleted file mode 100644
index ade8b17..0000000
--- a/third_party/abseil/LTS.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# Long Term Support (LTS) Branches
-
-This repository contains periodic snapshots of the Abseil codebase that are
-Long Term Support (LTS) branches. An LTS branch allows you to use a known
-version of Abseil without interfering with other projects which may also, in
-turn, use Abseil. (For more information about our releases, see the
-[Abseil Release Management](https://abseil.io/about/releases) guide.)
-
-## LTS Branches
-
-The following lists LTS branches and the dates on which they have been released:
-
-* [LTS Branch December 18, 2018](https://github.com/abseil/abseil-cpp/tree/lts_2018_12_18/)
-* [LTS Branch June 20, 2018](https://github.com/abseil/abseil-cpp/tree/lts_2018_06_20/)
-* [LTS Branch August 8, 2019](https://github.com/abseil/abseil-cpp/tree/lts_2019_08_08/)
-* [LTS Branch February 25, 2020](https://github.com/abseil/abseil-cpp/tree/lts_2020_02_25/)
diff --git a/third_party/abseil/README.md b/third_party/abseil/README.md
deleted file mode 100644
index 76f1d1e..0000000
--- a/third_party/abseil/README.md
+++ /dev/null
@@ -1,136 +0,0 @@
-# Abseil - C++ Common Libraries
-
-The repository contains the Abseil C++ library code. Abseil is an open-source
-collection of C++ code (compliant to C++11) designed to augment the C++
-standard library.
-
-## Table of Contents
-
-- [About Abseil](#about)
-- [Quickstart](#quickstart)
-- [Building Abseil](#build)
-- [Support](#support)
-- [Codemap](#codemap)
-- [Releases](#releases)
-- [License](#license)
-- [Links](#links)
-
-<a name="about"></a>
-## About Abseil
-
-Abseil is an open-source collection of C++ library code designed to augment
-the C++ standard library. The Abseil library code is collected from Google's
-own C++ code base, has been extensively tested and used in production, and
-is the same code we depend on in our daily coding lives.
-
-In some cases, Abseil provides pieces missing from the C++ standard; in
-others, Abseil provides alternatives to the standard for special needs
-we've found through usage in the Google code base. We denote those cases
-clearly within the library code we provide you.
-
-Abseil is not meant to be a competitor to the standard library; we've
-just found that many of these utilities serve a purpose within our code
-base, and we now want to provide those resources to the C++ community as
-a whole.
-
-<a name="quickstart"></a>
-## Quickstart
-
-If you want to just get started, make sure you at least run through the
-[Abseil Quickstart](https://abseil.io/docs/cpp/quickstart). The Quickstart
-contains information about setting up your development environment, downloading
-the Abseil code, running tests, and getting a simple binary working.
-
-<a name="build"></a>
-## Building Abseil
-
-[Bazel](https://bazel.build) and [CMake](https://cmake.org/) are the official
-build systems for Abseil.
-
-See the [quickstart](https://abseil.io/docs/cpp/quickstart) for more information
-on building Abseil using the Bazel build system.
-
-If you require CMake support, please check the [CMake build
-instructions](CMake/README.md) and [CMake
-Quickstart](https://abseil.io/docs/cpp/quickstart-cmake).
-
-## Support
-
-Abseil is officially supported on many platforms. See the [Abseil
-platform support
-guide](https://abseil.io/docs/cpp/platforms/platforms) for details on
-supported operating systems, compilers, CPUs, etc.
-
-## Codemap
-
-Abseil contains the following C++ library components:
-
-* [`base`](absl/base/) Abseil Fundamentals
-  <br /> The `base` library contains initialization code and other code which
-  all other Abseil code depends on. Code within `base` may not depend on any
-  other code (other than the C++ standard library).
-* [`algorithm`](absl/algorithm/)
-  <br /> The `algorithm` library contains additions to the C++ `<algorithm>`
-  library and container-based versions of such algorithms.
-* [`container`](absl/container/)
-  <br /> The `container` library contains additional STL-style containers,
-  including Abseil's unordered "Swiss table" containers.
-* [`debugging`](absl/debugging/)
-  <br /> The `debugging` library contains code useful for enabling leak
-  checks, and stacktrace and symbolization utilities.
-* [`hash`](absl/hash/)
-  <br /> The `hash` library contains the hashing framework and default hash
-  functor implementations for hashable types in Abseil.
-* [`memory`](absl/memory/)
-  <br /> The `memory` library contains C++11-compatible versions of
-  `std::make_unique()` and related memory management facilities.
-* [`meta`](absl/meta/)
-  <br /> The `meta` library contains C++11-compatible versions of type checks
-  available within C++14 and C++17 versions of the C++ `<type_traits>` library.
-* [`numeric`](absl/numeric/)
-  <br /> The `numeric` library contains C++11-compatible 128-bit integers.
-* [`status`](absl/status/)
-  <br /> The `status` contains abstractions for error handling, specifically
-  `absl::Status` and `absl::StatusOr<T>`.
-* [`strings`](absl/strings/)
-  <br /> The `strings` library contains a variety of strings routines and
-  utilities, including a C++11-compatible version of the C++17
-  `std::string_view` type.
-* [`synchronization`](absl/synchronization/)
-  <br /> The `synchronization` library contains concurrency primitives (Abseil's
-  `absl::Mutex` class, an alternative to `std::mutex`) and a variety of
-  synchronization abstractions.
-* [`time`](absl/time/)
-  <br /> The `time` library contains abstractions for computing with absolute
-  points in time, durations of time, and formatting and parsing time within
-  time zones.
-* [`types`](absl/types/)
-  <br /> The `types` library contains non-container utility types, like a
-  C++11-compatible version of the C++17 `std::optional` type.
-* [`utility`](absl/utility/)
-  <br /> The `utility` library contains utility and helper code.
-
-## Releases
-
-Abseil recommends users "live-at-head" (update to the latest commit from the
-master branch as often as possible). However, we realize this philosophy doesn't
-work for every project, so we also provide [Long Term Support
-Releases](https://github.com/abseil/abseil-cpp/releases) to which we backport
-fixes for severe bugs. See our [release
-management](https://abseil.io/about/releases) document for more details.
-
-## License
-
-The Abseil C++ library is licensed under the terms of the Apache
-license. See [LICENSE](LICENSE) for more information.
-
-## Links
-
-For more information about Abseil:
-
-* Consult our [Abseil Introduction](https://abseil.io/about/intro)
-* Read [Why Adopt Abseil](https://abseil.io/about/philosophy) to understand our
-  design philosophy.
-* Peruse our
-  [Abseil Compatibility Guarantees](https://abseil.io/about/compatibility) to
-  understand both what we promise to you, and what we expect of you in return.
diff --git a/third_party/abseil/UPGRADES.md b/third_party/abseil/UPGRADES.md
deleted file mode 100644
index 35599d0..0000000
--- a/third_party/abseil/UPGRADES.md
+++ /dev/null
@@ -1,17 +0,0 @@
-# C++ Upgrade Tools
-
-Abseil may occassionally release API-breaking changes. As noted in our
-[Compatibility Guidelines][compatibility-guide], we will aim to provide a tool
-to do the work of effecting such API-breaking changes, when absolutely
-necessary.
-
-These tools will be listed on the [C++ Upgrade Tools][upgrade-tools] guide on
-https://abseil.io.
-
-For more information, the [C++ Automated Upgrade Guide][api-upgrades-guide]
-outlines this process.
-
-[compatibility-guide]: https://abseil.io/about/compatibility
-[api-upgrades-guide]: https://abseil.io/docs/cpp/tools/api-upgrades
-[upgrade-tools]: https://abseil.io/docs/cpp/tools/upgrades/
-
diff --git a/third_party/abseil/WORKSPACE b/third_party/abseil/WORKSPACE
deleted file mode 100644
index 258d23b..0000000
--- a/third_party/abseil/WORKSPACE
+++ /dev/null
@@ -1,45 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-workspace(name = "com_google_absl")
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-# GoogleTest/GoogleMock framework. Used by most unit-tests.
-http_archive(
-    name = "com_google_googletest",
-    # Keep this URL in sync with ABSL_GOOGLETEST_COMMIT in ci/cmake_common.sh.
-    urls = ["https://github.com/google/googletest/archive/8567b09290fe402cf01923e2131c5635b8ed851b.zip"],  # 2020-06-12T22:24:28Z
-    strip_prefix = "googletest-8567b09290fe402cf01923e2131c5635b8ed851b",
-    sha256 = "9a8a166eb6a56c7b3d7b19dc2c946fe4778fd6f21c7a12368ad3b836d8f1be48",
-)
-
-# Google benchmark.
-http_archive(
-    name = "com_github_google_benchmark",
-    urls = ["https://github.com/google/benchmark/archive/bf585a2789e30585b4e3ce6baf11ef2750b54677.zip"],  # 2020-11-26T11:14:03Z
-    strip_prefix = "benchmark-bf585a2789e30585b4e3ce6baf11ef2750b54677",
-    sha256 = "2a778d821997df7d8646c9c59b8edb9a573a6e04c534c01892a40aa524a7b68c",
-)
-
-# C++ rules for Bazel.
-http_archive(
-    name = "rules_cc",
-    sha256 = "9a446e9dd9c1bb180c86977a8dc1e9e659550ae732ae58bd2e8fd51e15b2c91d",
-    strip_prefix = "rules_cc-262ebec3c2296296526740db4aefce68c80de7fa",
-    urls = [
-        "https://github.com/bazelbuild/rules_cc/archive/262ebec3c2296296526740db4aefce68c80de7fa.zip",
-    ],
-)
diff --git a/third_party/abseil/abseil.patch b/third_party/abseil/abseil.patch
new file mode 100644
index 0000000..748791b
--- /dev/null
+++ b/third_party/abseil/abseil.patch
@@ -0,0 +1,245 @@
+diff --git a/absl/copts/GENERATED_AbseilCopts.cmake b/absl/copts/GENERATED_AbseilCopts.cmake
+index 04e7b444..5d164438 100644
+--- a/absl/copts/GENERATED_AbseilCopts.cmake
++++ b/absl/copts/GENERATED_AbseilCopts.cmake
+@@ -49,6 +49,12 @@ list(APPEND ABSL_GCC_FLAGS
+     "-Wundef"
+     "-Wunused-local-typedefs"
+     "-Wunused-result"
++    "-Wno-format-nonliteral"
++    "-Wno-tautological-type-limit-compare"
++    "-Wno-unused-parameter"
++    "-Wno-sign-conversion"
++    "-Wno-shorten-64-to-32"
++    "-Wno-shadow"
+     "-Wvarargs"
+     "-Wvla"
+     "-Wwrite-strings"
+@@ -66,6 +72,12 @@ list(APPEND ABSL_GCC_TEST_FLAGS
+     "-Wundef"
+     "-Wunused-local-typedefs"
+     "-Wunused-result"
++    "-Wno-format-nonliteral"
++    "-Wno-tautological-type-limit-compare"
++    "-Wno-unused-parameter"
++    "-Wno-sign-conversion"
++    "-Wno-shorten-64-to-32"
++    "-Wno-shadow"
+     "-Wvarargs"
+     "-Wvla"
+     "-Wwrite-strings"
+@@ -95,8 +107,8 @@ list(APPEND ABSL_LLVM_FLAGS
+     "-Woverlength-strings"
+     "-Wpointer-arith"
+     "-Wself-assign"
+-    "-Wshadow-all"
+     "-Wshorten-64-to-32"
++    "-Wno-shadow"
+     "-Wsign-conversion"
+     "-Wstring-conversion"
+     "-Wtautological-overlap-compare"
+@@ -114,6 +126,11 @@ list(APPEND ABSL_LLVM_FLAGS
+     "-Wno-implicit-int-float-conversion"
+     "-Wno-unknown-warning-option"
+     "-DNOMINMAX"
++    "-Wno-format-nonliteral"
++    "-Wno-unused-parameter"
++    "-Wno-tautological-type-limit-compare"
++    "-Wno-sign-conversion"
++    "-Wno-shorten-64-to-32"
+ )
+ 
+ list(APPEND ABSL_LLVM_TEST_FLAGS
+@@ -133,7 +150,7 @@ list(APPEND ABSL_LLVM_TEST_FLAGS
+     "-Woverlength-strings"
+     "-Wpointer-arith"
+     "-Wself-assign"
+-    "-Wshadow-all"
++    "-Wno-shadow"
+     "-Wstring-conversion"
+     "-Wtautological-overlap-compare"
+     "-Wtautological-unsigned-zero-compare"
+@@ -150,6 +167,11 @@ list(APPEND ABSL_LLVM_TEST_FLAGS
+     "-Wno-implicit-int-float-conversion"
+     "-Wno-unknown-warning-option"
+     "-DNOMINMAX"
++    "-Wno-format-nonliteral"
++    "-Wno-unused-parameter"
++    "-Wno-tautological-type-limit-compare"
++    "-Wno-sign-conversion"
++    "-Wno-shorten-64-to-32"
+     "-Wno-deprecated-declarations"
+     "-Wno-implicit-int-conversion"
+     "-Wno-missing-prototypes"
+diff --git a/absl/copts/GENERATED_copts.bzl b/absl/copts/GENERATED_copts.bzl
+index 84f4bffc..f15266dd 100644
+--- a/absl/copts/GENERATED_copts.bzl
++++ b/absl/copts/GENERATED_copts.bzl
+@@ -50,6 +50,12 @@ ABSL_GCC_FLAGS = [
+     "-Wundef",
+     "-Wunused-local-typedefs",
+     "-Wunused-result",
++    "-Wno-format-nonliteral",
++    "-Wno-tautological-type-limit-compare",
++    "-Wno-unused-parameter",
++    "-Wno-sign-conversion",
++    "-Wno-shorten-64-to-32",
++    "-Wno-shadow",
+     "-Wvarargs",
+     "-Wvla",
+     "-Wwrite-strings",
+@@ -67,6 +73,12 @@ ABSL_GCC_TEST_FLAGS = [
+     "-Wundef",
+     "-Wunused-local-typedefs",
+     "-Wunused-result",
++    "-Wno-format-nonliteral",
++    "-Wno-tautological-type-limit-compare",
++    "-Wno-unused-parameter",
++    "-Wno-sign-conversion",
++    "-Wno-shorten-64-to-32",
++    "-Wno-shadow",
+     "-Wvarargs",
+     "-Wvla",
+     "-Wwrite-strings",
+@@ -96,8 +108,8 @@ ABSL_LLVM_FLAGS = [
+     "-Woverlength-strings",
+     "-Wpointer-arith",
+     "-Wself-assign",
+-    "-Wshadow-all",
+     "-Wshorten-64-to-32",
++    "-Wno-shadow",
+     "-Wsign-conversion",
+     "-Wstring-conversion",
+     "-Wtautological-overlap-compare",
+@@ -115,6 +127,11 @@ ABSL_LLVM_FLAGS = [
+     "-Wno-implicit-int-float-conversion",
+     "-Wno-unknown-warning-option",
+     "-DNOMINMAX",
++    "-Wno-format-nonliteral",
++    "-Wno-unused-parameter",
++    "-Wno-tautological-type-limit-compare",
++    "-Wno-sign-conversion",
++    "-Wno-shorten-64-to-32",
+ ]
+ 
+ ABSL_LLVM_TEST_FLAGS = [
+@@ -134,7 +151,7 @@ ABSL_LLVM_TEST_FLAGS = [
+     "-Woverlength-strings",
+     "-Wpointer-arith",
+     "-Wself-assign",
+-    "-Wshadow-all",
++    "-Wno-shadow",
+     "-Wstring-conversion",
+     "-Wtautological-overlap-compare",
+     "-Wtautological-unsigned-zero-compare",
+@@ -151,6 +168,11 @@ ABSL_LLVM_TEST_FLAGS = [
+     "-Wno-implicit-int-float-conversion",
+     "-Wno-unknown-warning-option",
+     "-DNOMINMAX",
++    "-Wno-format-nonliteral",
++    "-Wno-unused-parameter",
++    "-Wno-tautological-type-limit-compare",
++    "-Wno-sign-conversion",
++    "-Wno-shorten-64-to-32",
+     "-Wno-deprecated-declarations",
+     "-Wno-implicit-int-conversion",
+     "-Wno-missing-prototypes",
+diff --git a/absl/copts/copts.py b/absl/copts/copts.py
+index 06eeb67b..bfd49c1d 100644
+--- a/absl/copts/copts.py
++++ b/absl/copts/copts.py
+@@ -23,6 +23,12 @@ ABSL_GCC_FLAGS = [
+     "-Wundef",
+     "-Wunused-local-typedefs",
+     "-Wunused-result",
++    "-Wno-format-nonliteral",
++    "-Wno-tautological-type-limit-compare",
++    "-Wno-unused-parameter",
++    "-Wno-sign-conversion",
++    "-Wno-shorten-64-to-32",
++    "-Wno-shadow",
+     "-Wvarargs",
+     "-Wvla",  # variable-length array
+     "-Wwrite-strings",
+@@ -56,8 +62,8 @@ ABSL_LLVM_FLAGS = [
+     "-Woverlength-strings",
+     "-Wpointer-arith",
+     "-Wself-assign",
+-    "-Wshadow-all",
+     "-Wshorten-64-to-32",
++    "-Wno-shadow",
+     "-Wsign-conversion",
+     "-Wstring-conversion",
+     "-Wtautological-overlap-compare",
+@@ -80,6 +86,11 @@ ABSL_LLVM_FLAGS = [
+     "-Wno-unknown-warning-option",
+     # Don't define min and max macros (Build on Windows using clang)
+     "-DNOMINMAX",
++    "-Wno-format-nonliteral",
++    "-Wno-unused-parameter",
++    "-Wno-tautological-type-limit-compare",
++    "-Wno-sign-conversion",
++    "-Wno-shorten-64-to-32",
+ ]
+ 
+ ABSL_LLVM_TEST_ADDITIONAL_FLAGS = [
+diff --git a/absl/random/internal/BUILD.bazel b/absl/random/internal/BUILD.bazel
+index 81ca669b..e839860e 100644
+--- a/absl/random/internal/BUILD.bazel
++++ b/absl/random/internal/BUILD.bazel
+@@ -665,6 +665,7 @@ cc_test(
+ cc_library(
+     name = "nanobenchmark",
+     srcs = ["nanobenchmark.cc"],
++    copts = ABSL_DEFAULT_COPTS,
+     linkopts = ABSL_DEFAULT_LINKOPTS,
+     textual_hdrs = ["nanobenchmark.h"],
+     deps = [
+diff --git a/absl/strings/BUILD.bazel b/absl/strings/BUILD.bazel
+index ed330f26..5f1c44b6 100644
+--- a/absl/strings/BUILD.bazel
++++ b/absl/strings/BUILD.bazel
+@@ -653,6 +653,7 @@ cc_test(
+     srcs = [
+         "internal/cordz_info_statistics_test.cc",
+     ],
++    copts = ABSL_DEFAULT_COPTS,
+     deps = [
+         ":cord",
+         ":cord_internal",
+diff --git a/absl/time/internal/cctz/BUILD.bazel b/absl/time/internal/cctz/BUILD.bazel
+index edeabd81..49674f5f 100644
+--- a/absl/time/internal/cctz/BUILD.bazel
++++ b/absl/time/internal/cctz/BUILD.bazel
+@@ -16,6 +16,13 @@ package(features = ["-parse_headers"])
+ 
+ licenses(["notice"])
+ 
++load(
++    "//absl:copts/configure_copts.bzl",
++    "ABSL_DEFAULT_COPTS",
++    "ABSL_DEFAULT_LINKOPTS",
++    "ABSL_TEST_COPTS",
++)
++
+ ### libraries
+ 
+ cc_library(
+@@ -24,6 +31,8 @@ cc_library(
+     hdrs = [
+         "include/cctz/civil_time.h",
+     ],
++    copts = ABSL_DEFAULT_COPTS,
++    linkopts = ABSL_DEFAULT_LINKOPTS,
+     textual_hdrs = ["include/cctz/civil_time_detail.h"],
+     visibility = ["//visibility:public"],
+     deps = ["//absl/base:config"],
+@@ -53,6 +62,8 @@ cc_library(
+         "include/cctz/time_zone.h",
+         "include/cctz/zone_info_source.h",
+     ],
++    copts = ABSL_DEFAULT_COPTS,
++    linkopts = ABSL_DEFAULT_LINKOPTS,
+     # OS X and iOS no longer use `linkopts = ["-framework CoreFoundation"]`
+     # as (1) bazel adds it automatically, and (2) it caused problems when
+     # cross-compiling for Android.
diff --git a/third_party/abseil/absl/BUILD.bazel b/third_party/abseil/absl/BUILD.bazel
deleted file mode 100644
index 769708e..0000000
--- a/third_party/abseil/absl/BUILD.bazel
+++ /dev/null
@@ -1,65 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-config_setting(
-    name = "clang_compiler",
-    flag_values = {
-        "@bazel_tools//tools/cpp:compiler": "clang",
-    },
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "osx",
-    constraint_values = [
-        "@platforms//os:osx",
-    ],
-)
-
-config_setting(
-    name = "ios",
-    constraint_values = [
-        "@platforms//os:ios",
-    ],
-)
-
-config_setting(
-    name = "windows",
-    constraint_values = [
-        "@platforms//cpu:x86_64",
-        "@platforms//os:windows",
-    ],
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "ppc",
-    values = {
-        "cpu": "ppc",
-    },
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "wasm",
-    values = {
-        "cpu": "wasm32",
-    },
-    visibility = [":__subpackages__"],
-)
diff --git a/third_party/abseil/absl/CMakeLists.txt b/third_party/abseil/absl/CMakeLists.txt
deleted file mode 100644
index fbfa782..0000000
--- a/third_party/abseil/absl/CMakeLists.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-add_subdirectory(base)
-add_subdirectory(algorithm)
-add_subdirectory(container)
-add_subdirectory(debugging)
-add_subdirectory(flags)
-add_subdirectory(functional)
-add_subdirectory(hash)
-add_subdirectory(memory)
-add_subdirectory(meta)
-add_subdirectory(numeric)
-add_subdirectory(random)
-add_subdirectory(status)
-add_subdirectory(strings)
-add_subdirectory(synchronization)
-add_subdirectory(time)
-add_subdirectory(types)
-add_subdirectory(utility)
-
-if (${ABSL_BUILD_DLL})
-  absl_make_dll()
-endif()
diff --git a/third_party/abseil/absl/abseil.podspec.gen.py b/third_party/abseil/absl/abseil.podspec.gen.py
deleted file mode 100755
index 6375298..0000000
--- a/third_party/abseil/absl/abseil.podspec.gen.py
+++ /dev/null
@@ -1,229 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""This script generates abseil.podspec from all BUILD.bazel files.
-
-This is expected to run on abseil git repository with Bazel 1.0 on Linux.
-It recursively analyzes BUILD.bazel files using query command of Bazel to
-dump its build rules in XML format. From these rules, it constructs podspec
-structure.
-"""
-
-import argparse
-import collections
-import os
-import re
-import subprocess
-import xml.etree.ElementTree
-
-# Template of root podspec.
-SPEC_TEMPLATE = """
-# This file has been automatically generated from a script.
-# Please make modifications to `abseil.podspec.gen.py` instead.
-Pod::Spec.new do |s|
-  s.name     = 'abseil'
-  s.version  = '${version}'
-  s.summary  = 'Abseil Common Libraries (C++) from Google'
-  s.homepage = 'https://abseil.io'
-  s.license  = 'Apache License, Version 2.0'
-  s.authors  = { 'Abseil Team' => 'abseil-io@googlegroups.com' }
-  s.source = {
-    :git => 'https://github.com/abseil/abseil-cpp.git',
-    :tag => '${tag}',
-  }
-  s.module_name = 'absl'
-  s.header_mappings_dir = 'absl'
-  s.header_dir = 'absl'
-  s.libraries = 'c++'
-  s.compiler_flags = '-Wno-everything'
-  s.pod_target_xcconfig = {
-    'USER_HEADER_SEARCH_PATHS' => '$(inherited) "$(PODS_TARGET_SRCROOT)"',
-    'USE_HEADERMAP' => 'NO',
-    'ALWAYS_SEARCH_USER_PATHS' => 'NO',
-  }
-  s.ios.deployment_target = '9.0'
-  s.osx.deployment_target = '10.10'
-  s.tvos.deployment_target = '9.0'
-  s.watchos.deployment_target = '2.0'
-"""
-
-# Rule object representing the rule of Bazel BUILD.
-Rule = collections.namedtuple(
-    "Rule", "type name package srcs hdrs textual_hdrs deps visibility testonly")
-
-
-def get_elem_value(elem, name):
-  """Returns the value of XML element with the given name."""
-  for child in elem:
-    if child.attrib.get("name") != name:
-      continue
-    if child.tag == "string":
-      return child.attrib.get("value")
-    if child.tag == "boolean":
-      return child.attrib.get("value") == "true"
-    if child.tag == "list":
-      return [nested_child.attrib.get("value") for nested_child in child]
-    raise "Cannot recognize tag: " + child.tag
-  return None
-
-
-def normalize_paths(paths):
-  """Returns the list of normalized path."""
-  # e.g. ["//absl/strings:dir/header.h"] -> ["absl/strings/dir/header.h"]
-  return [path.lstrip("/").replace(":", "/") for path in paths]
-
-
-def parse_rule(elem, package):
-  """Returns a rule from bazel XML rule."""
-  return Rule(
-      type=elem.attrib["class"],
-      name=get_elem_value(elem, "name"),
-      package=package,
-      srcs=normalize_paths(get_elem_value(elem, "srcs") or []),
-      hdrs=normalize_paths(get_elem_value(elem, "hdrs") or []),
-      textual_hdrs=normalize_paths(get_elem_value(elem, "textual_hdrs") or []),
-      deps=get_elem_value(elem, "deps") or [],
-      visibility=get_elem_value(elem, "visibility") or [],
-      testonly=get_elem_value(elem, "testonly") or False)
-
-
-def read_build(package):
-  """Runs bazel query on given package file and returns all cc rules."""
-  result = subprocess.check_output(
-      ["bazel", "query", package + ":all", "--output", "xml"])
-  root = xml.etree.ElementTree.fromstring(result)
-  return [
-      parse_rule(elem, package)
-      for elem in root
-      if elem.tag == "rule" and elem.attrib["class"].startswith("cc_")
-  ]
-
-
-def collect_rules(root_path):
-  """Collects and returns all rules from root path recursively."""
-  rules = []
-  for cur, _, _ in os.walk(root_path):
-    build_path = os.path.join(cur, "BUILD.bazel")
-    if os.path.exists(build_path):
-      rules.extend(read_build("//" + cur))
-  return rules
-
-
-def relevant_rule(rule):
-  """Returns true if a given rule is relevant when generating a podspec."""
-  return (
-      # cc_library only (ignore cc_test, cc_binary)
-      rule.type == "cc_library" and
-      # ignore empty rule
-      (rule.hdrs + rule.textual_hdrs + rule.srcs) and
-      # ignore test-only rule
-      not rule.testonly)
-
-
-def get_spec_var(depth):
-  """Returns the name of variable for spec with given depth."""
-  return "s" if depth == 0 else "s{}".format(depth)
-
-
-def get_spec_name(label):
-  """Converts the label of bazel rule to the name of podspec."""
-  assert label.startswith("//absl/"), "{} doesn't start with //absl/".format(
-      label)
-  # e.g. //absl/apple/banana -> abseil/apple/banana
-  return "abseil/" + label[7:]
-
-
-def write_podspec(f, rules, args):
-  """Writes a podspec from given rules and args."""
-  rule_dir = build_rule_directory(rules)["abseil"]
-  # Write root part with given arguments
-  spec = re.sub(r"\$\{(\w+)\}", lambda x: args[x.group(1)],
-                SPEC_TEMPLATE).lstrip()
-  f.write(spec)
-  # Write all target rules
-  write_podspec_map(f, rule_dir, 0)
-  f.write("end\n")
-
-
-def build_rule_directory(rules):
-  """Builds a tree-style rule directory from given rules."""
-  rule_dir = {}
-  for rule in rules:
-    cur = rule_dir
-    for frag in get_spec_name(rule.package).split("/"):
-      cur = cur.setdefault(frag, {})
-    cur[rule.name] = rule
-  return rule_dir
-
-
-def write_podspec_map(f, cur_map, depth):
-  """Writes podspec from rule map recursively."""
-  for key, value in sorted(cur_map.items()):
-    indent = "  " * (depth + 1)
-    f.write("{indent}{var0}.subspec '{key}' do |{var1}|\n".format(
-        indent=indent,
-        key=key,
-        var0=get_spec_var(depth),
-        var1=get_spec_var(depth + 1)))
-    if isinstance(value, dict):
-      write_podspec_map(f, value, depth + 1)
-    else:
-      write_podspec_rule(f, value, depth + 1)
-    f.write("{indent}end\n".format(indent=indent))
-
-
-def write_podspec_rule(f, rule, depth):
-  """Writes podspec from given rule."""
-  indent = "  " * (depth + 1)
-  spec_var = get_spec_var(depth)
-  # Puts all files in hdrs, textual_hdrs, and srcs into source_files.
-  # Since CocoaPods treats header_files a bit differently from bazel,
-  # this won't generate a header_files field so that all source_files
-  # are considered as header files.
-  srcs = sorted(set(rule.hdrs + rule.textual_hdrs + rule.srcs))
-  write_indented_list(
-      f, "{indent}{var}.source_files = ".format(indent=indent, var=spec_var),
-      srcs)
-  # Writes dependencies of this rule.
-  for dep in sorted(rule.deps):
-    name = get_spec_name(dep.replace(":", "/"))
-    f.write("{indent}{var}.dependency '{dep}'\n".format(
-        indent=indent, var=spec_var, dep=name))
-
-
-def write_indented_list(f, leading, values):
-  """Writes leading values in an indented style."""
-  f.write(leading)
-  f.write((",\n" + " " * len(leading)).join("'{}'".format(v) for v in values))
-  f.write("\n")
-
-
-def generate(args):
-  """Generates a podspec file from all BUILD files under absl directory."""
-  rules = filter(relevant_rule, collect_rules("absl"))
-  with open(args.output, "wt") as f:
-    write_podspec(f, rules, vars(args))
-
-
-def main():
-  parser = argparse.ArgumentParser(
-      description="Generates abseil.podspec from BUILD.bazel")
-  parser.add_argument(
-      "-v", "--version", help="The version of podspec", required=True)
-  parser.add_argument(
-      "-t",
-      "--tag",
-      default=None,
-      help="The name of git tag (default: version)")
-  parser.add_argument(
-      "-o",
-      "--output",
-      default="abseil.podspec",
-      help="The name of output file (default: abseil.podspec)")
-  args = parser.parse_args()
-  if args.tag is None:
-    args.tag = args.version
-  generate(args)
-
-
-if __name__ == "__main__":
-  main()
diff --git a/third_party/abseil/absl/algorithm/BUILD.bazel b/third_party/abseil/absl/algorithm/BUILD.bazel
deleted file mode 100644
index a3002b7..0000000
--- a/third_party/abseil/absl/algorithm/BUILD.bazel
+++ /dev/null
@@ -1,91 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "algorithm",
-    hdrs = ["algorithm.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-    ],
-)
-
-cc_test(
-    name = "algorithm_test",
-    size = "small",
-    srcs = ["algorithm_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":algorithm",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "algorithm_benchmark",
-    srcs = ["equal_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    deps = [
-        ":algorithm",
-        "//absl/base:core_headers",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "container",
-    hdrs = [
-        "container.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":algorithm",
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "container_test",
-    srcs = ["container_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":container",
-        "//absl/base",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "//absl/types:span",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/algorithm/CMakeLists.txt b/third_party/abseil/absl/algorithm/CMakeLists.txt
deleted file mode 100644
index 56cd0fb..0000000
--- a/third_party/abseil/absl/algorithm/CMakeLists.txt
+++ /dev/null
@@ -1,69 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    algorithm
-  HDRS
-    "algorithm.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    algorithm_test
-  SRCS
-    "algorithm_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::algorithm
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    algorithm_container
-  HDRS
-    "container.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::algorithm
-    absl::core_headers
-    absl::meta
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    container_test
-  SRCS
-    "container_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::algorithm_container
-    absl::base
-    absl::core_headers
-    absl::memory
-    absl::span
-    gmock_main
-)
diff --git a/third_party/abseil/absl/algorithm/algorithm.h b/third_party/abseil/absl/algorithm/algorithm.h
deleted file mode 100644
index e9b4733..0000000
--- a/third_party/abseil/absl/algorithm/algorithm.h
+++ /dev/null
@@ -1,159 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: algorithm.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains Google extensions to the standard <algorithm> C++
-// header.
-
-#ifndef ABSL_ALGORITHM_ALGORITHM_H_
-#define ABSL_ALGORITHM_ALGORITHM_H_
-
-#include <algorithm>
-#include <iterator>
-#include <type_traits>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace algorithm_internal {
-
-// Performs comparisons with operator==, similar to C++14's `std::equal_to<>`.
-struct EqualTo {
-  template <typename T, typename U>
-  bool operator()(const T& a, const U& b) const {
-    return a == b;
-  }
-};
-
-template <typename InputIter1, typename InputIter2, typename Pred>
-bool EqualImpl(InputIter1 first1, InputIter1 last1, InputIter2 first2,
-               InputIter2 last2, Pred pred, std::input_iterator_tag,
-               std::input_iterator_tag) {
-  while (true) {
-    if (first1 == last1) return first2 == last2;
-    if (first2 == last2) return false;
-    if (!pred(*first1, *first2)) return false;
-    ++first1;
-    ++first2;
-  }
-}
-
-template <typename InputIter1, typename InputIter2, typename Pred>
-bool EqualImpl(InputIter1 first1, InputIter1 last1, InputIter2 first2,
-               InputIter2 last2, Pred&& pred, std::random_access_iterator_tag,
-               std::random_access_iterator_tag) {
-  return (last1 - first1 == last2 - first2) &&
-         std::equal(first1, last1, first2, std::forward<Pred>(pred));
-}
-
-// When we are using our own internal predicate that just applies operator==, we
-// forward to the non-predicate form of std::equal. This enables an optimization
-// in libstdc++ that can result in std::memcmp being used for integer types.
-template <typename InputIter1, typename InputIter2>
-bool EqualImpl(InputIter1 first1, InputIter1 last1, InputIter2 first2,
-               InputIter2 last2, algorithm_internal::EqualTo /* unused */,
-               std::random_access_iterator_tag,
-               std::random_access_iterator_tag) {
-  return (last1 - first1 == last2 - first2) &&
-         std::equal(first1, last1, first2);
-}
-
-template <typename It>
-It RotateImpl(It first, It middle, It last, std::true_type) {
-  return std::rotate(first, middle, last);
-}
-
-template <typename It>
-It RotateImpl(It first, It middle, It last, std::false_type) {
-  std::rotate(first, middle, last);
-  return std::next(first, std::distance(middle, last));
-}
-
-}  // namespace algorithm_internal
-
-// equal()
-//
-// Compares the equality of two ranges specified by pairs of iterators, using
-// the given predicate, returning true iff for each corresponding iterator i1
-// and i2 in the first and second range respectively, pred(*i1, *i2) == true
-//
-// This comparison takes at most min(`last1` - `first1`, `last2` - `first2`)
-// invocations of the predicate. Additionally, if InputIter1 and InputIter2 are
-// both random-access iterators, and `last1` - `first1` != `last2` - `first2`,
-// then the predicate is never invoked and the function returns false.
-//
-// This is a C++11-compatible implementation of C++14 `std::equal`.  See
-// https://en.cppreference.com/w/cpp/algorithm/equal for more information.
-template <typename InputIter1, typename InputIter2, typename Pred>
-bool equal(InputIter1 first1, InputIter1 last1, InputIter2 first2,
-           InputIter2 last2, Pred&& pred) {
-  return algorithm_internal::EqualImpl(
-      first1, last1, first2, last2, std::forward<Pred>(pred),
-      typename std::iterator_traits<InputIter1>::iterator_category{},
-      typename std::iterator_traits<InputIter2>::iterator_category{});
-}
-
-// Overload of equal() that performs comparison of two ranges specified by pairs
-// of iterators using operator==.
-template <typename InputIter1, typename InputIter2>
-bool equal(InputIter1 first1, InputIter1 last1, InputIter2 first2,
-           InputIter2 last2) {
-  return absl::equal(first1, last1, first2, last2,
-                     algorithm_internal::EqualTo{});
-}
-
-// linear_search()
-//
-// Performs a linear search for `value` using the iterator `first` up to
-// but not including `last`, returning true if [`first`, `last`) contains an
-// element equal to `value`.
-//
-// A linear search is of O(n) complexity which is guaranteed to make at most
-// n = (`last` - `first`) comparisons. A linear search over short containers
-// may be faster than a binary search, even when the container is sorted.
-template <typename InputIterator, typename EqualityComparable>
-bool linear_search(InputIterator first, InputIterator last,
-                   const EqualityComparable& value) {
-  return std::find(first, last, value) != last;
-}
-
-// rotate()
-//
-// Performs a left rotation on a range of elements (`first`, `last`) such that
-// `middle` is now the first element. `rotate()` returns an iterator pointing to
-// the first element before rotation. This function is exactly the same as
-// `std::rotate`, but fixes a bug in gcc
-// <= 4.9 where `std::rotate` returns `void` instead of an iterator.
-//
-// The complexity of this algorithm is the same as that of `std::rotate`, but if
-// `ForwardIterator` is not a random-access iterator, then `absl::rotate`
-// performs an additional pass over the range to construct the return value.
-template <typename ForwardIterator>
-ForwardIterator rotate(ForwardIterator first, ForwardIterator middle,
-                       ForwardIterator last) {
-  return algorithm_internal::RotateImpl(
-      first, middle, last,
-      std::is_same<decltype(std::rotate(first, middle, last)),
-                   ForwardIterator>());
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_ALGORITHM_ALGORITHM_H_
diff --git a/third_party/abseil/absl/algorithm/algorithm_test.cc b/third_party/abseil/absl/algorithm/algorithm_test.cc
deleted file mode 100644
index 81fccb6..0000000
--- a/third_party/abseil/absl/algorithm/algorithm_test.cc
+++ /dev/null
@@ -1,182 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/algorithm/algorithm.h"
-
-#include <algorithm>
-#include <list>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(EqualTest, DefaultComparisonRandomAccess) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<int> v2 = v1;
-  std::vector<int> v3 = {1, 2};
-  std::vector<int> v4 = {1, 2, 4};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end()));
-}
-
-TEST(EqualTest, DefaultComparison) {
-  std::list<int> lst1{1, 2, 3};
-  std::list<int> lst2 = lst1;
-  std::list<int> lst3{1, 2};
-  std::list<int> lst4{1, 2, 4};
-
-  EXPECT_TRUE(absl::equal(lst1.begin(), lst1.end(), lst2.begin(), lst2.end()));
-  EXPECT_FALSE(absl::equal(lst1.begin(), lst1.end(), lst3.begin(), lst3.end()));
-  EXPECT_FALSE(absl::equal(lst1.begin(), lst1.end(), lst4.begin(), lst4.end()));
-}
-
-TEST(EqualTest, EmptyRange) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<int> empty1;
-  std::vector<int> empty2;
-
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), empty1.begin(), empty1.end()));
-  EXPECT_FALSE(absl::equal(empty1.begin(), empty1.end(), v1.begin(), v1.end()));
-  EXPECT_TRUE(
-      absl::equal(empty1.begin(), empty1.end(), empty2.begin(), empty2.end()));
-}
-
-TEST(EqualTest, MixedIterTypes) {
-  std::vector<int> v1{1, 2, 3};
-  std::list<int> lst1{v1.begin(), v1.end()};
-  std::list<int> lst2{1, 2, 4};
-  std::list<int> lst3{1, 2};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), lst1.begin(), lst1.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), lst2.begin(), lst2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), lst3.begin(), lst3.end()));
-}
-
-TEST(EqualTest, MixedValueTypes) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<char> v2{1, 2, 3};
-  std::vector<char> v3{1, 2};
-  std::vector<char> v4{1, 2, 4};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end()));
-}
-
-TEST(EqualTest, WeirdIterators) {
-  std::vector<bool> v1{true, false};
-  std::vector<bool> v2 = v1;
-  std::vector<bool> v3{true};
-  std::vector<bool> v4{true, true, true};
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end()));
-}
-
-TEST(EqualTest, CustomComparison) {
-  int n[] = {1, 2, 3, 4};
-  std::vector<int*> v1{&n[0], &n[1], &n[2]};
-  std::vector<int*> v2 = v1;
-  std::vector<int*> v3{&n[0], &n[1], &n[3]};
-  std::vector<int*> v4{&n[0], &n[1]};
-
-  auto eq = [](int* a, int* b) { return *a == *b; };
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end(), eq));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end(), eq));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v4.begin(), v4.end(), eq));
-}
-
-TEST(EqualTest, MoveOnlyPredicate) {
-  std::vector<int> v1{1, 2, 3};
-  std::vector<int> v2{4, 5, 6};
-
-  // move-only equality predicate
-  struct Eq {
-    Eq() = default;
-    Eq(Eq &&) = default;
-    Eq(const Eq &) = delete;
-    Eq &operator=(const Eq &) = delete;
-    bool operator()(const int a, const int b) const { return a == b; }
-  };
-
-  EXPECT_TRUE(absl::equal(v1.begin(), v1.end(), v1.begin(), v1.end(), Eq()));
-  EXPECT_FALSE(absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end(), Eq()));
-}
-
-struct CountingTrivialPred {
-  int* count;
-  bool operator()(int, int) const {
-    ++*count;
-    return true;
-  }
-};
-
-TEST(EqualTest, RandomAccessComplexity) {
-  std::vector<int> v1{1, 1, 3};
-  std::vector<int> v2 = v1;
-  std::vector<int> v3{1, 2};
-
-  do {
-    int count = 0;
-    absl::equal(v1.begin(), v1.end(), v2.begin(), v2.end(),
-                CountingTrivialPred{&count});
-    EXPECT_LE(count, 3);
-  } while (std::next_permutation(v2.begin(), v2.end()));
-
-  int count = 0;
-  absl::equal(v1.begin(), v1.end(), v3.begin(), v3.end(),
-              CountingTrivialPred{&count});
-  EXPECT_EQ(count, 0);
-}
-
-class LinearSearchTest : public testing::Test {
- protected:
-  LinearSearchTest() : container_{1, 2, 3} {}
-
-  static bool Is3(int n) { return n == 3; }
-  static bool Is4(int n) { return n == 4; }
-
-  std::vector<int> container_;
-};
-
-TEST_F(LinearSearchTest, linear_search) {
-  EXPECT_TRUE(absl::linear_search(container_.begin(), container_.end(), 3));
-  EXPECT_FALSE(absl::linear_search(container_.begin(), container_.end(), 4));
-}
-
-TEST_F(LinearSearchTest, linear_searchConst) {
-  const std::vector<int> *const const_container = &container_;
-  EXPECT_TRUE(
-      absl::linear_search(const_container->begin(), const_container->end(), 3));
-  EXPECT_FALSE(
-      absl::linear_search(const_container->begin(), const_container->end(), 4));
-}
-
-TEST(RotateTest, Rotate) {
-  std::vector<int> v{0, 1, 2, 3, 4};
-  EXPECT_EQ(*absl::rotate(v.begin(), v.begin() + 2, v.end()), 0);
-  EXPECT_THAT(v, testing::ElementsAreArray({2, 3, 4, 0, 1}));
-
-  std::list<int> l{0, 1, 2, 3, 4};
-  EXPECT_EQ(*absl::rotate(l.begin(), std::next(l.begin(), 3), l.end()), 0);
-  EXPECT_THAT(l, testing::ElementsAreArray({3, 4, 0, 1, 2}));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/algorithm/container.h b/third_party/abseil/absl/algorithm/container.h
deleted file mode 100644
index 6398438..0000000
--- a/third_party/abseil/absl/algorithm/container.h
+++ /dev/null
@@ -1,1764 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: container.h
-// -----------------------------------------------------------------------------
-//
-// This header file provides Container-based versions of algorithmic functions
-// within the C++ standard library. The following standard library sets of
-// functions are covered within this file:
-//
-//   * Algorithmic <iterator> functions
-//   * Algorithmic <numeric> functions
-//   * <algorithm> functions
-//
-// The standard library functions operate on iterator ranges; the functions
-// within this API operate on containers, though many return iterator ranges.
-//
-// All functions within this API are named with a `c_` prefix. Calls such as
-// `absl::c_xx(container, ...) are equivalent to std:: functions such as
-// `std::xx(std::begin(cont), std::end(cont), ...)`. Functions that act on
-// iterators but not conceptually on iterator ranges (e.g. `std::iter_swap`)
-// have no equivalent here.
-//
-// For template parameter and variable naming, `C` indicates the container type
-// to which the function is applied, `Pred` indicates the predicate object type
-// to be used by the function and `T` indicates the applicable element type.
-
-#ifndef ABSL_ALGORITHM_CONTAINER_H_
-#define ABSL_ALGORITHM_CONTAINER_H_
-
-#include <algorithm>
-#include <cassert>
-#include <iterator>
-#include <numeric>
-#include <type_traits>
-#include <unordered_map>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "absl/algorithm/algorithm.h"
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_algorithm_internal {
-
-// NOTE: it is important to defer to ADL lookup for building with C++ modules,
-// especially for headers like <valarray> which are not visible from this file
-// but specialize std::begin and std::end.
-using std::begin;
-using std::end;
-
-// The type of the iterator given by begin(c) (possibly std::begin(c)).
-// ContainerIter<const vector<T>> gives vector<T>::const_iterator,
-// while ContainerIter<vector<T>> gives vector<T>::iterator.
-template <typename C>
-using ContainerIter = decltype(begin(std::declval<C&>()));
-
-// An MSVC bug involving template parameter substitution requires us to use
-// decltype() here instead of just std::pair.
-template <typename C1, typename C2>
-using ContainerIterPairType =
-    decltype(std::make_pair(ContainerIter<C1>(), ContainerIter<C2>()));
-
-template <typename C>
-using ContainerDifferenceType =
-    decltype(std::distance(std::declval<ContainerIter<C>>(),
-                           std::declval<ContainerIter<C>>()));
-
-template <typename C>
-using ContainerPointerType =
-    typename std::iterator_traits<ContainerIter<C>>::pointer;
-
-// container_algorithm_internal::c_begin and
-// container_algorithm_internal::c_end are abbreviations for proper ADL
-// lookup of std::begin and std::end, i.e.
-//   using std::begin;
-//   using std::end;
-//   std::foo(begin(c), end(c));
-// becomes
-//   std::foo(container_algorithm_internal::begin(c),
-//            container_algorithm_internal::end(c));
-// These are meant for internal use only.
-
-template <typename C>
-ContainerIter<C> c_begin(C& c) { return begin(c); }
-
-template <typename C>
-ContainerIter<C> c_end(C& c) { return end(c); }
-
-template <typename T>
-struct IsUnorderedContainer : std::false_type {};
-
-template <class Key, class T, class Hash, class KeyEqual, class Allocator>
-struct IsUnorderedContainer<
-    std::unordered_map<Key, T, Hash, KeyEqual, Allocator>> : std::true_type {};
-
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct IsUnorderedContainer<std::unordered_set<Key, Hash, KeyEqual, Allocator>>
-    : std::true_type {};
-
-// container_algorithm_internal::c_size. It is meant for internal use only.
-
-template <class C>
-auto c_size(C& c) -> decltype(c.size()) {
-  return c.size();
-}
-
-template <class T, std::size_t N>
-constexpr std::size_t c_size(T (&)[N]) {
-  return N;
-}
-
-}  // namespace container_algorithm_internal
-
-// PUBLIC API
-
-//------------------------------------------------------------------------------
-// Abseil algorithm.h functions
-//------------------------------------------------------------------------------
-
-// c_linear_search()
-//
-// Container-based version of absl::linear_search() for performing a linear
-// search within a container.
-template <typename C, typename EqualityComparable>
-bool c_linear_search(const C& c, EqualityComparable&& value) {
-  return linear_search(container_algorithm_internal::c_begin(c),
-                       container_algorithm_internal::c_end(c),
-                       std::forward<EqualityComparable>(value));
-}
-
-//------------------------------------------------------------------------------
-// <iterator> algorithms
-//------------------------------------------------------------------------------
-
-// c_distance()
-//
-// Container-based version of the <iterator> `std::distance()` function to
-// return the number of elements within a container.
-template <typename C>
-container_algorithm_internal::ContainerDifferenceType<const C> c_distance(
-    const C& c) {
-  return std::distance(container_algorithm_internal::c_begin(c),
-                       container_algorithm_internal::c_end(c));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Non-modifying sequence operations
-//------------------------------------------------------------------------------
-
-// c_all_of()
-//
-// Container-based version of the <algorithm> `std::all_of()` function to
-// test a condition on all elements within a container.
-template <typename C, typename Pred>
-bool c_all_of(const C& c, Pred&& pred) {
-  return std::all_of(container_algorithm_internal::c_begin(c),
-                     container_algorithm_internal::c_end(c),
-                     std::forward<Pred>(pred));
-}
-
-// c_any_of()
-//
-// Container-based version of the <algorithm> `std::any_of()` function to
-// test if any element in a container fulfills a condition.
-template <typename C, typename Pred>
-bool c_any_of(const C& c, Pred&& pred) {
-  return std::any_of(container_algorithm_internal::c_begin(c),
-                     container_algorithm_internal::c_end(c),
-                     std::forward<Pred>(pred));
-}
-
-// c_none_of()
-//
-// Container-based version of the <algorithm> `std::none_of()` function to
-// test if no elements in a container fulfill a condition.
-template <typename C, typename Pred>
-bool c_none_of(const C& c, Pred&& pred) {
-  return std::none_of(container_algorithm_internal::c_begin(c),
-                      container_algorithm_internal::c_end(c),
-                      std::forward<Pred>(pred));
-}
-
-// c_for_each()
-//
-// Container-based version of the <algorithm> `std::for_each()` function to
-// apply a function to a container's elements.
-template <typename C, typename Function>
-decay_t<Function> c_for_each(C&& c, Function&& f) {
-  return std::for_each(container_algorithm_internal::c_begin(c),
-                       container_algorithm_internal::c_end(c),
-                       std::forward<Function>(f));
-}
-
-// c_find()
-//
-// Container-based version of the <algorithm> `std::find()` function to find
-// the first element containing the passed value within a container value.
-template <typename C, typename T>
-container_algorithm_internal::ContainerIter<C> c_find(C& c, T&& value) {
-  return std::find(container_algorithm_internal::c_begin(c),
-                   container_algorithm_internal::c_end(c),
-                   std::forward<T>(value));
-}
-
-// c_find_if()
-//
-// Container-based version of the <algorithm> `std::find_if()` function to find
-// the first element in a container matching the given condition.
-template <typename C, typename Pred>
-container_algorithm_internal::ContainerIter<C> c_find_if(C& c, Pred&& pred) {
-  return std::find_if(container_algorithm_internal::c_begin(c),
-                      container_algorithm_internal::c_end(c),
-                      std::forward<Pred>(pred));
-}
-
-// c_find_if_not()
-//
-// Container-based version of the <algorithm> `std::find_if_not()` function to
-// find the first element in a container not matching the given condition.
-template <typename C, typename Pred>
-container_algorithm_internal::ContainerIter<C> c_find_if_not(C& c,
-                                                             Pred&& pred) {
-  return std::find_if_not(container_algorithm_internal::c_begin(c),
-                          container_algorithm_internal::c_end(c),
-                          std::forward<Pred>(pred));
-}
-
-// c_find_end()
-//
-// Container-based version of the <algorithm> `std::find_end()` function to
-// find the last subsequence within a container.
-template <typename Sequence1, typename Sequence2>
-container_algorithm_internal::ContainerIter<Sequence1> c_find_end(
-    Sequence1& sequence, Sequence2& subsequence) {
-  return std::find_end(container_algorithm_internal::c_begin(sequence),
-                       container_algorithm_internal::c_end(sequence),
-                       container_algorithm_internal::c_begin(subsequence),
-                       container_algorithm_internal::c_end(subsequence));
-}
-
-// Overload of c_find_end() for using a predicate evaluation other than `==` as
-// the function's test condition.
-template <typename Sequence1, typename Sequence2, typename BinaryPredicate>
-container_algorithm_internal::ContainerIter<Sequence1> c_find_end(
-    Sequence1& sequence, Sequence2& subsequence, BinaryPredicate&& pred) {
-  return std::find_end(container_algorithm_internal::c_begin(sequence),
-                       container_algorithm_internal::c_end(sequence),
-                       container_algorithm_internal::c_begin(subsequence),
-                       container_algorithm_internal::c_end(subsequence),
-                       std::forward<BinaryPredicate>(pred));
-}
-
-// c_find_first_of()
-//
-// Container-based version of the <algorithm> `std::find_first_of()` function to
-// find the first element within the container that is also within the options
-// container.
-template <typename C1, typename C2>
-container_algorithm_internal::ContainerIter<C1> c_find_first_of(C1& container,
-                                                                C2& options) {
-  return std::find_first_of(container_algorithm_internal::c_begin(container),
-                            container_algorithm_internal::c_end(container),
-                            container_algorithm_internal::c_begin(options),
-                            container_algorithm_internal::c_end(options));
-}
-
-// Overload of c_find_first_of() for using a predicate evaluation other than
-// `==` as the function's test condition.
-template <typename C1, typename C2, typename BinaryPredicate>
-container_algorithm_internal::ContainerIter<C1> c_find_first_of(
-    C1& container, C2& options, BinaryPredicate&& pred) {
-  return std::find_first_of(container_algorithm_internal::c_begin(container),
-                            container_algorithm_internal::c_end(container),
-                            container_algorithm_internal::c_begin(options),
-                            container_algorithm_internal::c_end(options),
-                            std::forward<BinaryPredicate>(pred));
-}
-
-// c_adjacent_find()
-//
-// Container-based version of the <algorithm> `std::adjacent_find()` function to
-// find equal adjacent elements within a container.
-template <typename Sequence>
-container_algorithm_internal::ContainerIter<Sequence> c_adjacent_find(
-    Sequence& sequence) {
-  return std::adjacent_find(container_algorithm_internal::c_begin(sequence),
-                            container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_adjacent_find() for using a predicate evaluation other than
-// `==` as the function's test condition.
-template <typename Sequence, typename BinaryPredicate>
-container_algorithm_internal::ContainerIter<Sequence> c_adjacent_find(
-    Sequence& sequence, BinaryPredicate&& pred) {
-  return std::adjacent_find(container_algorithm_internal::c_begin(sequence),
-                            container_algorithm_internal::c_end(sequence),
-                            std::forward<BinaryPredicate>(pred));
-}
-
-// c_count()
-//
-// Container-based version of the <algorithm> `std::count()` function to count
-// values that match within a container.
-template <typename C, typename T>
-container_algorithm_internal::ContainerDifferenceType<const C> c_count(
-    const C& c, T&& value) {
-  return std::count(container_algorithm_internal::c_begin(c),
-                    container_algorithm_internal::c_end(c),
-                    std::forward<T>(value));
-}
-
-// c_count_if()
-//
-// Container-based version of the <algorithm> `std::count_if()` function to
-// count values matching a condition within a container.
-template <typename C, typename Pred>
-container_algorithm_internal::ContainerDifferenceType<const C> c_count_if(
-    const C& c, Pred&& pred) {
-  return std::count_if(container_algorithm_internal::c_begin(c),
-                       container_algorithm_internal::c_end(c),
-                       std::forward<Pred>(pred));
-}
-
-// c_mismatch()
-//
-// Container-based version of the <algorithm> `std::mismatch()` function to
-// return the first element where two ordered containers differ. Applies `==` to
-// the first N elements of `c1` and `c2`, where N = min(size(c1), size(c2)).
-template <typename C1, typename C2>
-container_algorithm_internal::ContainerIterPairType<C1, C2>
-c_mismatch(C1& c1, C2& c2) {
-  auto first1 = container_algorithm_internal::c_begin(c1);
-  auto last1 = container_algorithm_internal::c_end(c1);
-  auto first2 = container_algorithm_internal::c_begin(c2);
-  auto last2 = container_algorithm_internal::c_end(c2);
-
-  for (; first1 != last1 && first2 != last2; ++first1, (void)++first2) {
-    // Negates equality because Cpp17EqualityComparable doesn't require clients
-    // to overload both `operator==` and `operator!=`.
-    if (!(*first1 == *first2)) {
-      break;
-    }
-  }
-
-  return std::make_pair(first1, first2);
-}
-
-// Overload of c_mismatch() for using a predicate evaluation other than `==` as
-// the function's test condition. Applies `pred`to the first N elements of `c1`
-// and `c2`, where N = min(size(c1), size(c2)).
-template <typename C1, typename C2, typename BinaryPredicate>
-container_algorithm_internal::ContainerIterPairType<C1, C2>
-c_mismatch(C1& c1, C2& c2, BinaryPredicate pred) {
-  auto first1 = container_algorithm_internal::c_begin(c1);
-  auto last1 = container_algorithm_internal::c_end(c1);
-  auto first2 = container_algorithm_internal::c_begin(c2);
-  auto last2 = container_algorithm_internal::c_end(c2);
-
-  for (; first1 != last1 && first2 != last2; ++first1, (void)++first2) {
-    if (!pred(*first1, *first2)) {
-      break;
-    }
-  }
-
-  return std::make_pair(first1, first2);
-}
-
-// c_equal()
-//
-// Container-based version of the <algorithm> `std::equal()` function to
-// test whether two containers are equal.
-//
-// NOTE: the semantics of c_equal() are slightly different than those of
-// equal(): while the latter iterates over the second container only up to the
-// size of the first container, c_equal() also checks whether the container
-// sizes are equal.  This better matches expectations about c_equal() based on
-// its signature.
-//
-// Example:
-//   vector v1 = <1, 2, 3>;
-//   vector v2 = <1, 2, 3, 4>;
-//   equal(std::begin(v1), std::end(v1), std::begin(v2)) returns true
-//   c_equal(v1, v2) returns false
-
-template <typename C1, typename C2>
-bool c_equal(const C1& c1, const C2& c2) {
-  return ((container_algorithm_internal::c_size(c1) ==
-           container_algorithm_internal::c_size(c2)) &&
-          std::equal(container_algorithm_internal::c_begin(c1),
-                     container_algorithm_internal::c_end(c1),
-                     container_algorithm_internal::c_begin(c2)));
-}
-
-// Overload of c_equal() for using a predicate evaluation other than `==` as
-// the function's test condition.
-template <typename C1, typename C2, typename BinaryPredicate>
-bool c_equal(const C1& c1, const C2& c2, BinaryPredicate&& pred) {
-  return ((container_algorithm_internal::c_size(c1) ==
-           container_algorithm_internal::c_size(c2)) &&
-          std::equal(container_algorithm_internal::c_begin(c1),
-                     container_algorithm_internal::c_end(c1),
-                     container_algorithm_internal::c_begin(c2),
-                     std::forward<BinaryPredicate>(pred)));
-}
-
-// c_is_permutation()
-//
-// Container-based version of the <algorithm> `std::is_permutation()` function
-// to test whether a container is a permutation of another.
-template <typename C1, typename C2>
-bool c_is_permutation(const C1& c1, const C2& c2) {
-  using std::begin;
-  using std::end;
-  return c1.size() == c2.size() &&
-         std::is_permutation(begin(c1), end(c1), begin(c2));
-}
-
-// Overload of c_is_permutation() for using a predicate evaluation other than
-// `==` as the function's test condition.
-template <typename C1, typename C2, typename BinaryPredicate>
-bool c_is_permutation(const C1& c1, const C2& c2, BinaryPredicate&& pred) {
-  using std::begin;
-  using std::end;
-  return c1.size() == c2.size() &&
-         std::is_permutation(begin(c1), end(c1), begin(c2),
-                             std::forward<BinaryPredicate>(pred));
-}
-
-// c_search()
-//
-// Container-based version of the <algorithm> `std::search()` function to search
-// a container for a subsequence.
-template <typename Sequence1, typename Sequence2>
-container_algorithm_internal::ContainerIter<Sequence1> c_search(
-    Sequence1& sequence, Sequence2& subsequence) {
-  return std::search(container_algorithm_internal::c_begin(sequence),
-                     container_algorithm_internal::c_end(sequence),
-                     container_algorithm_internal::c_begin(subsequence),
-                     container_algorithm_internal::c_end(subsequence));
-}
-
-// Overload of c_search() for using a predicate evaluation other than
-// `==` as the function's test condition.
-template <typename Sequence1, typename Sequence2, typename BinaryPredicate>
-container_algorithm_internal::ContainerIter<Sequence1> c_search(
-    Sequence1& sequence, Sequence2& subsequence, BinaryPredicate&& pred) {
-  return std::search(container_algorithm_internal::c_begin(sequence),
-                     container_algorithm_internal::c_end(sequence),
-                     container_algorithm_internal::c_begin(subsequence),
-                     container_algorithm_internal::c_end(subsequence),
-                     std::forward<BinaryPredicate>(pred));
-}
-
-// c_search_n()
-//
-// Container-based version of the <algorithm> `std::search_n()` function to
-// search a container for the first sequence of N elements.
-template <typename Sequence, typename Size, typename T>
-container_algorithm_internal::ContainerIter<Sequence> c_search_n(
-    Sequence& sequence, Size count, T&& value) {
-  return std::search_n(container_algorithm_internal::c_begin(sequence),
-                       container_algorithm_internal::c_end(sequence), count,
-                       std::forward<T>(value));
-}
-
-// Overload of c_search_n() for using a predicate evaluation other than
-// `==` as the function's test condition.
-template <typename Sequence, typename Size, typename T,
-          typename BinaryPredicate>
-container_algorithm_internal::ContainerIter<Sequence> c_search_n(
-    Sequence& sequence, Size count, T&& value, BinaryPredicate&& pred) {
-  return std::search_n(container_algorithm_internal::c_begin(sequence),
-                       container_algorithm_internal::c_end(sequence), count,
-                       std::forward<T>(value),
-                       std::forward<BinaryPredicate>(pred));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Modifying sequence operations
-//------------------------------------------------------------------------------
-
-// c_copy()
-//
-// Container-based version of the <algorithm> `std::copy()` function to copy a
-// container's elements into an iterator.
-template <typename InputSequence, typename OutputIterator>
-OutputIterator c_copy(const InputSequence& input, OutputIterator output) {
-  return std::copy(container_algorithm_internal::c_begin(input),
-                   container_algorithm_internal::c_end(input), output);
-}
-
-// c_copy_n()
-//
-// Container-based version of the <algorithm> `std::copy_n()` function to copy a
-// container's first N elements into an iterator.
-template <typename C, typename Size, typename OutputIterator>
-OutputIterator c_copy_n(const C& input, Size n, OutputIterator output) {
-  return std::copy_n(container_algorithm_internal::c_begin(input), n, output);
-}
-
-// c_copy_if()
-//
-// Container-based version of the <algorithm> `std::copy_if()` function to copy
-// a container's elements satisfying some condition into an iterator.
-template <typename InputSequence, typename OutputIterator, typename Pred>
-OutputIterator c_copy_if(const InputSequence& input, OutputIterator output,
-                         Pred&& pred) {
-  return std::copy_if(container_algorithm_internal::c_begin(input),
-                      container_algorithm_internal::c_end(input), output,
-                      std::forward<Pred>(pred));
-}
-
-// c_copy_backward()
-//
-// Container-based version of the <algorithm> `std::copy_backward()` function to
-// copy a container's elements in reverse order into an iterator.
-template <typename C, typename BidirectionalIterator>
-BidirectionalIterator c_copy_backward(const C& src,
-                                      BidirectionalIterator dest) {
-  return std::copy_backward(container_algorithm_internal::c_begin(src),
-                            container_algorithm_internal::c_end(src), dest);
-}
-
-// c_move()
-//
-// Container-based version of the <algorithm> `std::move()` function to move
-// a container's elements into an iterator.
-template <typename C, typename OutputIterator>
-OutputIterator c_move(C&& src, OutputIterator dest) {
-  return std::move(container_algorithm_internal::c_begin(src),
-                   container_algorithm_internal::c_end(src), dest);
-}
-
-// c_move_backward()
-//
-// Container-based version of the <algorithm> `std::move_backward()` function to
-// move a container's elements into an iterator in reverse order.
-template <typename C, typename BidirectionalIterator>
-BidirectionalIterator c_move_backward(C&& src, BidirectionalIterator dest) {
-  return std::move_backward(container_algorithm_internal::c_begin(src),
-                            container_algorithm_internal::c_end(src), dest);
-}
-
-// c_swap_ranges()
-//
-// Container-based version of the <algorithm> `std::swap_ranges()` function to
-// swap a container's elements with another container's elements. Swaps the
-// first N elements of `c1` and `c2`, where N = min(size(c1), size(c2)).
-template <typename C1, typename C2>
-container_algorithm_internal::ContainerIter<C2> c_swap_ranges(C1& c1, C2& c2) {
-  auto first1 = container_algorithm_internal::c_begin(c1);
-  auto last1 = container_algorithm_internal::c_end(c1);
-  auto first2 = container_algorithm_internal::c_begin(c2);
-  auto last2 = container_algorithm_internal::c_end(c2);
-
-  using std::swap;
-  for (; first1 != last1 && first2 != last2; ++first1, (void)++first2) {
-    swap(*first1, *first2);
-  }
-  return first2;
-}
-
-// c_transform()
-//
-// Container-based version of the <algorithm> `std::transform()` function to
-// transform a container's elements using the unary operation, storing the
-// result in an iterator pointing to the last transformed element in the output
-// range.
-template <typename InputSequence, typename OutputIterator, typename UnaryOp>
-OutputIterator c_transform(const InputSequence& input, OutputIterator output,
-                           UnaryOp&& unary_op) {
-  return std::transform(container_algorithm_internal::c_begin(input),
-                        container_algorithm_internal::c_end(input), output,
-                        std::forward<UnaryOp>(unary_op));
-}
-
-// Overload of c_transform() for performing a transformation using a binary
-// predicate. Applies `binary_op` to the first N elements of `c1` and `c2`,
-// where N = min(size(c1), size(c2)).
-template <typename InputSequence1, typename InputSequence2,
-          typename OutputIterator, typename BinaryOp>
-OutputIterator c_transform(const InputSequence1& input1,
-                           const InputSequence2& input2, OutputIterator output,
-                           BinaryOp&& binary_op) {
-  auto first1 = container_algorithm_internal::c_begin(input1);
-  auto last1 = container_algorithm_internal::c_end(input1);
-  auto first2 = container_algorithm_internal::c_begin(input2);
-  auto last2 = container_algorithm_internal::c_end(input2);
-  for (; first1 != last1 && first2 != last2;
-       ++first1, (void)++first2, ++output) {
-    *output = binary_op(*first1, *first2);
-  }
-
-  return output;
-}
-
-// c_replace()
-//
-// Container-based version of the <algorithm> `std::replace()` function to
-// replace a container's elements of some value with a new value. The container
-// is modified in place.
-template <typename Sequence, typename T>
-void c_replace(Sequence& sequence, const T& old_value, const T& new_value) {
-  std::replace(container_algorithm_internal::c_begin(sequence),
-               container_algorithm_internal::c_end(sequence), old_value,
-               new_value);
-}
-
-// c_replace_if()
-//
-// Container-based version of the <algorithm> `std::replace_if()` function to
-// replace a container's elements of some value with a new value based on some
-// condition. The container is modified in place.
-template <typename C, typename Pred, typename T>
-void c_replace_if(C& c, Pred&& pred, T&& new_value) {
-  std::replace_if(container_algorithm_internal::c_begin(c),
-                  container_algorithm_internal::c_end(c),
-                  std::forward<Pred>(pred), std::forward<T>(new_value));
-}
-
-// c_replace_copy()
-//
-// Container-based version of the <algorithm> `std::replace_copy()` function to
-// replace a container's elements of some value with a new value  and return the
-// results within an iterator.
-template <typename C, typename OutputIterator, typename T>
-OutputIterator c_replace_copy(const C& c, OutputIterator result, T&& old_value,
-                              T&& new_value) {
-  return std::replace_copy(container_algorithm_internal::c_begin(c),
-                           container_algorithm_internal::c_end(c), result,
-                           std::forward<T>(old_value),
-                           std::forward<T>(new_value));
-}
-
-// c_replace_copy_if()
-//
-// Container-based version of the <algorithm> `std::replace_copy_if()` function
-// to replace a container's elements of some value with a new value based on
-// some condition, and return the results within an iterator.
-template <typename C, typename OutputIterator, typename Pred, typename T>
-OutputIterator c_replace_copy_if(const C& c, OutputIterator result, Pred&& pred,
-                                 T&& new_value) {
-  return std::replace_copy_if(container_algorithm_internal::c_begin(c),
-                              container_algorithm_internal::c_end(c), result,
-                              std::forward<Pred>(pred),
-                              std::forward<T>(new_value));
-}
-
-// c_fill()
-//
-// Container-based version of the <algorithm> `std::fill()` function to fill a
-// container with some value.
-template <typename C, typename T>
-void c_fill(C& c, T&& value) {
-  std::fill(container_algorithm_internal::c_begin(c),
-            container_algorithm_internal::c_end(c), std::forward<T>(value));
-}
-
-// c_fill_n()
-//
-// Container-based version of the <algorithm> `std::fill_n()` function to fill
-// the first N elements in a container with some value.
-template <typename C, typename Size, typename T>
-void c_fill_n(C& c, Size n, T&& value) {
-  std::fill_n(container_algorithm_internal::c_begin(c), n,
-              std::forward<T>(value));
-}
-
-// c_generate()
-//
-// Container-based version of the <algorithm> `std::generate()` function to
-// assign a container's elements to the values provided by the given generator.
-template <typename C, typename Generator>
-void c_generate(C& c, Generator&& gen) {
-  std::generate(container_algorithm_internal::c_begin(c),
-                container_algorithm_internal::c_end(c),
-                std::forward<Generator>(gen));
-}
-
-// c_generate_n()
-//
-// Container-based version of the <algorithm> `std::generate_n()` function to
-// assign a container's first N elements to the values provided by the given
-// generator.
-template <typename C, typename Size, typename Generator>
-container_algorithm_internal::ContainerIter<C> c_generate_n(C& c, Size n,
-                                                            Generator&& gen) {
-  return std::generate_n(container_algorithm_internal::c_begin(c), n,
-                         std::forward<Generator>(gen));
-}
-
-// Note: `c_xx()` <algorithm> container versions for `remove()`, `remove_if()`,
-// and `unique()` are omitted, because it's not clear whether or not such
-// functions should call erase on their supplied sequences afterwards. Either
-// behavior would be surprising for a different set of users.
-
-// c_remove_copy()
-//
-// Container-based version of the <algorithm> `std::remove_copy()` function to
-// copy a container's elements while removing any elements matching the given
-// `value`.
-template <typename C, typename OutputIterator, typename T>
-OutputIterator c_remove_copy(const C& c, OutputIterator result, T&& value) {
-  return std::remove_copy(container_algorithm_internal::c_begin(c),
-                          container_algorithm_internal::c_end(c), result,
-                          std::forward<T>(value));
-}
-
-// c_remove_copy_if()
-//
-// Container-based version of the <algorithm> `std::remove_copy_if()` function
-// to copy a container's elements while removing any elements matching the given
-// condition.
-template <typename C, typename OutputIterator, typename Pred>
-OutputIterator c_remove_copy_if(const C& c, OutputIterator result,
-                                Pred&& pred) {
-  return std::remove_copy_if(container_algorithm_internal::c_begin(c),
-                             container_algorithm_internal::c_end(c), result,
-                             std::forward<Pred>(pred));
-}
-
-// c_unique_copy()
-//
-// Container-based version of the <algorithm> `std::unique_copy()` function to
-// copy a container's elements while removing any elements containing duplicate
-// values.
-template <typename C, typename OutputIterator>
-OutputIterator c_unique_copy(const C& c, OutputIterator result) {
-  return std::unique_copy(container_algorithm_internal::c_begin(c),
-                          container_algorithm_internal::c_end(c), result);
-}
-
-// Overload of c_unique_copy() for using a predicate evaluation other than
-// `==` for comparing uniqueness of the element values.
-template <typename C, typename OutputIterator, typename BinaryPredicate>
-OutputIterator c_unique_copy(const C& c, OutputIterator result,
-                             BinaryPredicate&& pred) {
-  return std::unique_copy(container_algorithm_internal::c_begin(c),
-                          container_algorithm_internal::c_end(c), result,
-                          std::forward<BinaryPredicate>(pred));
-}
-
-// c_reverse()
-//
-// Container-based version of the <algorithm> `std::reverse()` function to
-// reverse a container's elements.
-template <typename Sequence>
-void c_reverse(Sequence& sequence) {
-  std::reverse(container_algorithm_internal::c_begin(sequence),
-               container_algorithm_internal::c_end(sequence));
-}
-
-// c_reverse_copy()
-//
-// Container-based version of the <algorithm> `std::reverse()` function to
-// reverse a container's elements and write them to an iterator range.
-template <typename C, typename OutputIterator>
-OutputIterator c_reverse_copy(const C& sequence, OutputIterator result) {
-  return std::reverse_copy(container_algorithm_internal::c_begin(sequence),
-                           container_algorithm_internal::c_end(sequence),
-                           result);
-}
-
-// c_rotate()
-//
-// Container-based version of the <algorithm> `std::rotate()` function to
-// shift a container's elements leftward such that the `middle` element becomes
-// the first element in the container.
-template <typename C,
-          typename Iterator = container_algorithm_internal::ContainerIter<C>>
-Iterator c_rotate(C& sequence, Iterator middle) {
-  return absl::rotate(container_algorithm_internal::c_begin(sequence), middle,
-                      container_algorithm_internal::c_end(sequence));
-}
-
-// c_rotate_copy()
-//
-// Container-based version of the <algorithm> `std::rotate_copy()` function to
-// shift a container's elements leftward such that the `middle` element becomes
-// the first element in a new iterator range.
-template <typename C, typename OutputIterator>
-OutputIterator c_rotate_copy(
-    const C& sequence,
-    container_algorithm_internal::ContainerIter<const C> middle,
-    OutputIterator result) {
-  return std::rotate_copy(container_algorithm_internal::c_begin(sequence),
-                          middle, container_algorithm_internal::c_end(sequence),
-                          result);
-}
-
-// c_shuffle()
-//
-// Container-based version of the <algorithm> `std::shuffle()` function to
-// randomly shuffle elements within the container using a `gen()` uniform random
-// number generator.
-template <typename RandomAccessContainer, typename UniformRandomBitGenerator>
-void c_shuffle(RandomAccessContainer& c, UniformRandomBitGenerator&& gen) {
-  std::shuffle(container_algorithm_internal::c_begin(c),
-               container_algorithm_internal::c_end(c),
-               std::forward<UniformRandomBitGenerator>(gen));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Partition functions
-//------------------------------------------------------------------------------
-
-// c_is_partitioned()
-//
-// Container-based version of the <algorithm> `std::is_partitioned()` function
-// to test whether all elements in the container for which `pred` returns `true`
-// precede those for which `pred` is `false`.
-template <typename C, typename Pred>
-bool c_is_partitioned(const C& c, Pred&& pred) {
-  return std::is_partitioned(container_algorithm_internal::c_begin(c),
-                             container_algorithm_internal::c_end(c),
-                             std::forward<Pred>(pred));
-}
-
-// c_partition()
-//
-// Container-based version of the <algorithm> `std::partition()` function
-// to rearrange all elements in a container in such a way that all elements for
-// which `pred` returns `true` precede all those for which it returns `false`,
-// returning an iterator to the first element of the second group.
-template <typename C, typename Pred>
-container_algorithm_internal::ContainerIter<C> c_partition(C& c, Pred&& pred) {
-  return std::partition(container_algorithm_internal::c_begin(c),
-                        container_algorithm_internal::c_end(c),
-                        std::forward<Pred>(pred));
-}
-
-// c_stable_partition()
-//
-// Container-based version of the <algorithm> `std::stable_partition()` function
-// to rearrange all elements in a container in such a way that all elements for
-// which `pred` returns `true` precede all those for which it returns `false`,
-// preserving the relative ordering between the two groups. The function returns
-// an iterator to the first element of the second group.
-template <typename C, typename Pred>
-container_algorithm_internal::ContainerIter<C> c_stable_partition(C& c,
-                                                                  Pred&& pred) {
-  return std::stable_partition(container_algorithm_internal::c_begin(c),
-                               container_algorithm_internal::c_end(c),
-                               std::forward<Pred>(pred));
-}
-
-// c_partition_copy()
-//
-// Container-based version of the <algorithm> `std::partition_copy()` function
-// to partition a container's elements and return them into two iterators: one
-// for which `pred` returns `true`, and one for which `pred` returns `false.`
-
-template <typename C, typename OutputIterator1, typename OutputIterator2,
-          typename Pred>
-std::pair<OutputIterator1, OutputIterator2> c_partition_copy(
-    const C& c, OutputIterator1 out_true, OutputIterator2 out_false,
-    Pred&& pred) {
-  return std::partition_copy(container_algorithm_internal::c_begin(c),
-                             container_algorithm_internal::c_end(c), out_true,
-                             out_false, std::forward<Pred>(pred));
-}
-
-// c_partition_point()
-//
-// Container-based version of the <algorithm> `std::partition_point()` function
-// to return the first element of an already partitioned container for which
-// the given `pred` is not `true`.
-template <typename C, typename Pred>
-container_algorithm_internal::ContainerIter<C> c_partition_point(C& c,
-                                                                 Pred&& pred) {
-  return std::partition_point(container_algorithm_internal::c_begin(c),
-                              container_algorithm_internal::c_end(c),
-                              std::forward<Pred>(pred));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Sorting functions
-//------------------------------------------------------------------------------
-
-// c_sort()
-//
-// Container-based version of the <algorithm> `std::sort()` function
-// to sort elements in ascending order of their values.
-template <typename C>
-void c_sort(C& c) {
-  std::sort(container_algorithm_internal::c_begin(c),
-            container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_sort() for performing a `comp` comparison other than the
-// default `operator<`.
-template <typename C, typename Compare>
-void c_sort(C& c, Compare&& comp) {
-  std::sort(container_algorithm_internal::c_begin(c),
-            container_algorithm_internal::c_end(c),
-            std::forward<Compare>(comp));
-}
-
-// c_stable_sort()
-//
-// Container-based version of the <algorithm> `std::stable_sort()` function
-// to sort elements in ascending order of their values, preserving the order
-// of equivalents.
-template <typename C>
-void c_stable_sort(C& c) {
-  std::stable_sort(container_algorithm_internal::c_begin(c),
-                   container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_stable_sort() for performing a `comp` comparison other than the
-// default `operator<`.
-template <typename C, typename Compare>
-void c_stable_sort(C& c, Compare&& comp) {
-  std::stable_sort(container_algorithm_internal::c_begin(c),
-                   container_algorithm_internal::c_end(c),
-                   std::forward<Compare>(comp));
-}
-
-// c_is_sorted()
-//
-// Container-based version of the <algorithm> `std::is_sorted()` function
-// to evaluate whether the given container is sorted in ascending order.
-template <typename C>
-bool c_is_sorted(const C& c) {
-  return std::is_sorted(container_algorithm_internal::c_begin(c),
-                        container_algorithm_internal::c_end(c));
-}
-
-// c_is_sorted() overload for performing a `comp` comparison other than the
-// default `operator<`.
-template <typename C, typename Compare>
-bool c_is_sorted(const C& c, Compare&& comp) {
-  return std::is_sorted(container_algorithm_internal::c_begin(c),
-                        container_algorithm_internal::c_end(c),
-                        std::forward<Compare>(comp));
-}
-
-// c_partial_sort()
-//
-// Container-based version of the <algorithm> `std::partial_sort()` function
-// to rearrange elements within a container such that elements before `middle`
-// are sorted in ascending order.
-template <typename RandomAccessContainer>
-void c_partial_sort(
-    RandomAccessContainer& sequence,
-    container_algorithm_internal::ContainerIter<RandomAccessContainer> middle) {
-  std::partial_sort(container_algorithm_internal::c_begin(sequence), middle,
-                    container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_partial_sort() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename RandomAccessContainer, typename Compare>
-void c_partial_sort(
-    RandomAccessContainer& sequence,
-    container_algorithm_internal::ContainerIter<RandomAccessContainer> middle,
-    Compare&& comp) {
-  std::partial_sort(container_algorithm_internal::c_begin(sequence), middle,
-                    container_algorithm_internal::c_end(sequence),
-                    std::forward<Compare>(comp));
-}
-
-// c_partial_sort_copy()
-//
-// Container-based version of the <algorithm> `std::partial_sort_copy()`
-// function to sort the elements in the given range `result` within the larger
-// `sequence` in ascending order (and using `result` as the output parameter).
-// At most min(result.last - result.first, sequence.last - sequence.first)
-// elements from the sequence will be stored in the result.
-template <typename C, typename RandomAccessContainer>
-container_algorithm_internal::ContainerIter<RandomAccessContainer>
-c_partial_sort_copy(const C& sequence, RandomAccessContainer& result) {
-  return std::partial_sort_copy(container_algorithm_internal::c_begin(sequence),
-                                container_algorithm_internal::c_end(sequence),
-                                container_algorithm_internal::c_begin(result),
-                                container_algorithm_internal::c_end(result));
-}
-
-// Overload of c_partial_sort_copy() for performing a `comp` comparison other
-// than the default `operator<`.
-template <typename C, typename RandomAccessContainer, typename Compare>
-container_algorithm_internal::ContainerIter<RandomAccessContainer>
-c_partial_sort_copy(const C& sequence, RandomAccessContainer& result,
-                    Compare&& comp) {
-  return std::partial_sort_copy(container_algorithm_internal::c_begin(sequence),
-                                container_algorithm_internal::c_end(sequence),
-                                container_algorithm_internal::c_begin(result),
-                                container_algorithm_internal::c_end(result),
-                                std::forward<Compare>(comp));
-}
-
-// c_is_sorted_until()
-//
-// Container-based version of the <algorithm> `std::is_sorted_until()` function
-// to return the first element within a container that is not sorted in
-// ascending order as an iterator.
-template <typename C>
-container_algorithm_internal::ContainerIter<C> c_is_sorted_until(C& c) {
-  return std::is_sorted_until(container_algorithm_internal::c_begin(c),
-                              container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_is_sorted_until() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename C, typename Compare>
-container_algorithm_internal::ContainerIter<C> c_is_sorted_until(
-    C& c, Compare&& comp) {
-  return std::is_sorted_until(container_algorithm_internal::c_begin(c),
-                              container_algorithm_internal::c_end(c),
-                              std::forward<Compare>(comp));
-}
-
-// c_nth_element()
-//
-// Container-based version of the <algorithm> `std::nth_element()` function
-// to rearrange the elements within a container such that the `nth` element
-// would be in that position in an ordered sequence; other elements may be in
-// any order, except that all preceding `nth` will be less than that element,
-// and all following `nth` will be greater than that element.
-template <typename RandomAccessContainer>
-void c_nth_element(
-    RandomAccessContainer& sequence,
-    container_algorithm_internal::ContainerIter<RandomAccessContainer> nth) {
-  std::nth_element(container_algorithm_internal::c_begin(sequence), nth,
-                   container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_nth_element() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename RandomAccessContainer, typename Compare>
-void c_nth_element(
-    RandomAccessContainer& sequence,
-    container_algorithm_internal::ContainerIter<RandomAccessContainer> nth,
-    Compare&& comp) {
-  std::nth_element(container_algorithm_internal::c_begin(sequence), nth,
-                   container_algorithm_internal::c_end(sequence),
-                   std::forward<Compare>(comp));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Binary Search
-//------------------------------------------------------------------------------
-
-// c_lower_bound()
-//
-// Container-based version of the <algorithm> `std::lower_bound()` function
-// to return an iterator pointing to the first element in a sorted container
-// which does not compare less than `value`.
-template <typename Sequence, typename T>
-container_algorithm_internal::ContainerIter<Sequence> c_lower_bound(
-    Sequence& sequence, T&& value) {
-  return std::lower_bound(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<T>(value));
-}
-
-// Overload of c_lower_bound() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename Sequence, typename T, typename Compare>
-container_algorithm_internal::ContainerIter<Sequence> c_lower_bound(
-    Sequence& sequence, T&& value, Compare&& comp) {
-  return std::lower_bound(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<T>(value), std::forward<Compare>(comp));
-}
-
-// c_upper_bound()
-//
-// Container-based version of the <algorithm> `std::upper_bound()` function
-// to return an iterator pointing to the first element in a sorted container
-// which is greater than `value`.
-template <typename Sequence, typename T>
-container_algorithm_internal::ContainerIter<Sequence> c_upper_bound(
-    Sequence& sequence, T&& value) {
-  return std::upper_bound(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<T>(value));
-}
-
-// Overload of c_upper_bound() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename Sequence, typename T, typename Compare>
-container_algorithm_internal::ContainerIter<Sequence> c_upper_bound(
-    Sequence& sequence, T&& value, Compare&& comp) {
-  return std::upper_bound(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<T>(value), std::forward<Compare>(comp));
-}
-
-// c_equal_range()
-//
-// Container-based version of the <algorithm> `std::equal_range()` function
-// to return an iterator pair pointing to the first and last elements in a
-// sorted container which compare equal to `value`.
-template <typename Sequence, typename T>
-container_algorithm_internal::ContainerIterPairType<Sequence, Sequence>
-c_equal_range(Sequence& sequence, T&& value) {
-  return std::equal_range(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<T>(value));
-}
-
-// Overload of c_equal_range() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename Sequence, typename T, typename Compare>
-container_algorithm_internal::ContainerIterPairType<Sequence, Sequence>
-c_equal_range(Sequence& sequence, T&& value, Compare&& comp) {
-  return std::equal_range(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<T>(value), std::forward<Compare>(comp));
-}
-
-// c_binary_search()
-//
-// Container-based version of the <algorithm> `std::binary_search()` function
-// to test if any element in the sorted container contains a value equivalent to
-// 'value'.
-template <typename Sequence, typename T>
-bool c_binary_search(Sequence&& sequence, T&& value) {
-  return std::binary_search(container_algorithm_internal::c_begin(sequence),
-                            container_algorithm_internal::c_end(sequence),
-                            std::forward<T>(value));
-}
-
-// Overload of c_binary_search() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename Sequence, typename T, typename Compare>
-bool c_binary_search(Sequence&& sequence, T&& value, Compare&& comp) {
-  return std::binary_search(container_algorithm_internal::c_begin(sequence),
-                            container_algorithm_internal::c_end(sequence),
-                            std::forward<T>(value),
-                            std::forward<Compare>(comp));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Merge functions
-//------------------------------------------------------------------------------
-
-// c_merge()
-//
-// Container-based version of the <algorithm> `std::merge()` function
-// to merge two sorted containers into a single sorted iterator.
-template <typename C1, typename C2, typename OutputIterator>
-OutputIterator c_merge(const C1& c1, const C2& c2, OutputIterator result) {
-  return std::merge(container_algorithm_internal::c_begin(c1),
-                    container_algorithm_internal::c_end(c1),
-                    container_algorithm_internal::c_begin(c2),
-                    container_algorithm_internal::c_end(c2), result);
-}
-
-// Overload of c_merge() for performing a `comp` comparison other than
-// the default `operator<`.
-template <typename C1, typename C2, typename OutputIterator, typename Compare>
-OutputIterator c_merge(const C1& c1, const C2& c2, OutputIterator result,
-                       Compare&& comp) {
-  return std::merge(container_algorithm_internal::c_begin(c1),
-                    container_algorithm_internal::c_end(c1),
-                    container_algorithm_internal::c_begin(c2),
-                    container_algorithm_internal::c_end(c2), result,
-                    std::forward<Compare>(comp));
-}
-
-// c_inplace_merge()
-//
-// Container-based version of the <algorithm> `std::inplace_merge()` function
-// to merge a supplied iterator `middle` into a container.
-template <typename C>
-void c_inplace_merge(C& c,
-                     container_algorithm_internal::ContainerIter<C> middle) {
-  std::inplace_merge(container_algorithm_internal::c_begin(c), middle,
-                     container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_inplace_merge() for performing a merge using a `comp` other
-// than `operator<`.
-template <typename C, typename Compare>
-void c_inplace_merge(C& c,
-                     container_algorithm_internal::ContainerIter<C> middle,
-                     Compare&& comp) {
-  std::inplace_merge(container_algorithm_internal::c_begin(c), middle,
-                     container_algorithm_internal::c_end(c),
-                     std::forward<Compare>(comp));
-}
-
-// c_includes()
-//
-// Container-based version of the <algorithm> `std::includes()` function
-// to test whether a sorted container `c1` entirely contains another sorted
-// container `c2`.
-template <typename C1, typename C2>
-bool c_includes(const C1& c1, const C2& c2) {
-  return std::includes(container_algorithm_internal::c_begin(c1),
-                       container_algorithm_internal::c_end(c1),
-                       container_algorithm_internal::c_begin(c2),
-                       container_algorithm_internal::c_end(c2));
-}
-
-// Overload of c_includes() for performing a merge using a `comp` other than
-// `operator<`.
-template <typename C1, typename C2, typename Compare>
-bool c_includes(const C1& c1, const C2& c2, Compare&& comp) {
-  return std::includes(container_algorithm_internal::c_begin(c1),
-                       container_algorithm_internal::c_end(c1),
-                       container_algorithm_internal::c_begin(c2),
-                       container_algorithm_internal::c_end(c2),
-                       std::forward<Compare>(comp));
-}
-
-// c_set_union()
-//
-// Container-based version of the <algorithm> `std::set_union()` function
-// to return an iterator containing the union of two containers; duplicate
-// values are not copied into the output.
-template <typename C1, typename C2, typename OutputIterator,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_union(const C1& c1, const C2& c2, OutputIterator output) {
-  return std::set_union(container_algorithm_internal::c_begin(c1),
-                        container_algorithm_internal::c_end(c1),
-                        container_algorithm_internal::c_begin(c2),
-                        container_algorithm_internal::c_end(c2), output);
-}
-
-// Overload of c_set_union() for performing a merge using a `comp` other than
-// `operator<`.
-template <typename C1, typename C2, typename OutputIterator, typename Compare,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_union(const C1& c1, const C2& c2, OutputIterator output,
-                           Compare&& comp) {
-  return std::set_union(container_algorithm_internal::c_begin(c1),
-                        container_algorithm_internal::c_end(c1),
-                        container_algorithm_internal::c_begin(c2),
-                        container_algorithm_internal::c_end(c2), output,
-                        std::forward<Compare>(comp));
-}
-
-// c_set_intersection()
-//
-// Container-based version of the <algorithm> `std::set_intersection()` function
-// to return an iterator containing the intersection of two containers.
-template <typename C1, typename C2, typename OutputIterator,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_intersection(const C1& c1, const C2& c2,
-                                  OutputIterator output) {
-  return std::set_intersection(container_algorithm_internal::c_begin(c1),
-                               container_algorithm_internal::c_end(c1),
-                               container_algorithm_internal::c_begin(c2),
-                               container_algorithm_internal::c_end(c2), output);
-}
-
-// Overload of c_set_intersection() for performing a merge using a `comp` other
-// than `operator<`.
-template <typename C1, typename C2, typename OutputIterator, typename Compare,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_intersection(const C1& c1, const C2& c2,
-                                  OutputIterator output, Compare&& comp) {
-  return std::set_intersection(container_algorithm_internal::c_begin(c1),
-                               container_algorithm_internal::c_end(c1),
-                               container_algorithm_internal::c_begin(c2),
-                               container_algorithm_internal::c_end(c2), output,
-                               std::forward<Compare>(comp));
-}
-
-// c_set_difference()
-//
-// Container-based version of the <algorithm> `std::set_difference()` function
-// to return an iterator containing elements present in the first container but
-// not in the second.
-template <typename C1, typename C2, typename OutputIterator,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_difference(const C1& c1, const C2& c2,
-                                OutputIterator output) {
-  return std::set_difference(container_algorithm_internal::c_begin(c1),
-                             container_algorithm_internal::c_end(c1),
-                             container_algorithm_internal::c_begin(c2),
-                             container_algorithm_internal::c_end(c2), output);
-}
-
-// Overload of c_set_difference() for performing a merge using a `comp` other
-// than `operator<`.
-template <typename C1, typename C2, typename OutputIterator, typename Compare,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_difference(const C1& c1, const C2& c2,
-                                OutputIterator output, Compare&& comp) {
-  return std::set_difference(container_algorithm_internal::c_begin(c1),
-                             container_algorithm_internal::c_end(c1),
-                             container_algorithm_internal::c_begin(c2),
-                             container_algorithm_internal::c_end(c2), output,
-                             std::forward<Compare>(comp));
-}
-
-// c_set_symmetric_difference()
-//
-// Container-based version of the <algorithm> `std::set_symmetric_difference()`
-// function to return an iterator containing elements present in either one
-// container or the other, but not both.
-template <typename C1, typename C2, typename OutputIterator,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_symmetric_difference(const C1& c1, const C2& c2,
-                                          OutputIterator output) {
-  return std::set_symmetric_difference(
-      container_algorithm_internal::c_begin(c1),
-      container_algorithm_internal::c_end(c1),
-      container_algorithm_internal::c_begin(c2),
-      container_algorithm_internal::c_end(c2), output);
-}
-
-// Overload of c_set_symmetric_difference() for performing a merge using a
-// `comp` other than `operator<`.
-template <typename C1, typename C2, typename OutputIterator, typename Compare,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C1>::value,
-              void>::type,
-          typename = typename std::enable_if<
-              !container_algorithm_internal::IsUnorderedContainer<C2>::value,
-              void>::type>
-OutputIterator c_set_symmetric_difference(const C1& c1, const C2& c2,
-                                          OutputIterator output,
-                                          Compare&& comp) {
-  return std::set_symmetric_difference(
-      container_algorithm_internal::c_begin(c1),
-      container_algorithm_internal::c_end(c1),
-      container_algorithm_internal::c_begin(c2),
-      container_algorithm_internal::c_end(c2), output,
-      std::forward<Compare>(comp));
-}
-
-//------------------------------------------------------------------------------
-// <algorithm> Heap functions
-//------------------------------------------------------------------------------
-
-// c_push_heap()
-//
-// Container-based version of the <algorithm> `std::push_heap()` function
-// to push a value onto a container heap.
-template <typename RandomAccessContainer>
-void c_push_heap(RandomAccessContainer& sequence) {
-  std::push_heap(container_algorithm_internal::c_begin(sequence),
-                 container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_push_heap() for performing a push operation on a heap using a
-// `comp` other than `operator<`.
-template <typename RandomAccessContainer, typename Compare>
-void c_push_heap(RandomAccessContainer& sequence, Compare&& comp) {
-  std::push_heap(container_algorithm_internal::c_begin(sequence),
-                 container_algorithm_internal::c_end(sequence),
-                 std::forward<Compare>(comp));
-}
-
-// c_pop_heap()
-//
-// Container-based version of the <algorithm> `std::pop_heap()` function
-// to pop a value from a heap container.
-template <typename RandomAccessContainer>
-void c_pop_heap(RandomAccessContainer& sequence) {
-  std::pop_heap(container_algorithm_internal::c_begin(sequence),
-                container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_pop_heap() for performing a pop operation on a heap using a
-// `comp` other than `operator<`.
-template <typename RandomAccessContainer, typename Compare>
-void c_pop_heap(RandomAccessContainer& sequence, Compare&& comp) {
-  std::pop_heap(container_algorithm_internal::c_begin(sequence),
-                container_algorithm_internal::c_end(sequence),
-                std::forward<Compare>(comp));
-}
-
-// c_make_heap()
-//
-// Container-based version of the <algorithm> `std::make_heap()` function
-// to make a container a heap.
-template <typename RandomAccessContainer>
-void c_make_heap(RandomAccessContainer& sequence) {
-  std::make_heap(container_algorithm_internal::c_begin(sequence),
-                 container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_make_heap() for performing heap comparisons using a
-// `comp` other than `operator<`
-template <typename RandomAccessContainer, typename Compare>
-void c_make_heap(RandomAccessContainer& sequence, Compare&& comp) {
-  std::make_heap(container_algorithm_internal::c_begin(sequence),
-                 container_algorithm_internal::c_end(sequence),
-                 std::forward<Compare>(comp));
-}
-
-// c_sort_heap()
-//
-// Container-based version of the <algorithm> `std::sort_heap()` function
-// to sort a heap into ascending order (after which it is no longer a heap).
-template <typename RandomAccessContainer>
-void c_sort_heap(RandomAccessContainer& sequence) {
-  std::sort_heap(container_algorithm_internal::c_begin(sequence),
-                 container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_sort_heap() for performing heap comparisons using a
-// `comp` other than `operator<`
-template <typename RandomAccessContainer, typename Compare>
-void c_sort_heap(RandomAccessContainer& sequence, Compare&& comp) {
-  std::sort_heap(container_algorithm_internal::c_begin(sequence),
-                 container_algorithm_internal::c_end(sequence),
-                 std::forward<Compare>(comp));
-}
-
-// c_is_heap()
-//
-// Container-based version of the <algorithm> `std::is_heap()` function
-// to check whether the given container is a heap.
-template <typename RandomAccessContainer>
-bool c_is_heap(const RandomAccessContainer& sequence) {
-  return std::is_heap(container_algorithm_internal::c_begin(sequence),
-                      container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_is_heap() for performing heap comparisons using a
-// `comp` other than `operator<`
-template <typename RandomAccessContainer, typename Compare>
-bool c_is_heap(const RandomAccessContainer& sequence, Compare&& comp) {
-  return std::is_heap(container_algorithm_internal::c_begin(sequence),
-                      container_algorithm_internal::c_end(sequence),
-                      std::forward<Compare>(comp));
-}
-
-// c_is_heap_until()
-//
-// Container-based version of the <algorithm> `std::is_heap_until()` function
-// to find the first element in a given container which is not in heap order.
-template <typename RandomAccessContainer>
-container_algorithm_internal::ContainerIter<RandomAccessContainer>
-c_is_heap_until(RandomAccessContainer& sequence) {
-  return std::is_heap_until(container_algorithm_internal::c_begin(sequence),
-                            container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_is_heap_until() for performing heap comparisons using a
-// `comp` other than `operator<`
-template <typename RandomAccessContainer, typename Compare>
-container_algorithm_internal::ContainerIter<RandomAccessContainer>
-c_is_heap_until(RandomAccessContainer& sequence, Compare&& comp) {
-  return std::is_heap_until(container_algorithm_internal::c_begin(sequence),
-                            container_algorithm_internal::c_end(sequence),
-                            std::forward<Compare>(comp));
-}
-
-//------------------------------------------------------------------------------
-//  <algorithm> Min/max
-//------------------------------------------------------------------------------
-
-// c_min_element()
-//
-// Container-based version of the <algorithm> `std::min_element()` function
-// to return an iterator pointing to the element with the smallest value, using
-// `operator<` to make the comparisons.
-template <typename Sequence>
-container_algorithm_internal::ContainerIter<Sequence> c_min_element(
-    Sequence& sequence) {
-  return std::min_element(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_min_element() for performing a `comp` comparison other than
-// `operator<`.
-template <typename Sequence, typename Compare>
-container_algorithm_internal::ContainerIter<Sequence> c_min_element(
-    Sequence& sequence, Compare&& comp) {
-  return std::min_element(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<Compare>(comp));
-}
-
-// c_max_element()
-//
-// Container-based version of the <algorithm> `std::max_element()` function
-// to return an iterator pointing to the element with the largest value, using
-// `operator<` to make the comparisons.
-template <typename Sequence>
-container_algorithm_internal::ContainerIter<Sequence> c_max_element(
-    Sequence& sequence) {
-  return std::max_element(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence));
-}
-
-// Overload of c_max_element() for performing a `comp` comparison other than
-// `operator<`.
-template <typename Sequence, typename Compare>
-container_algorithm_internal::ContainerIter<Sequence> c_max_element(
-    Sequence& sequence, Compare&& comp) {
-  return std::max_element(container_algorithm_internal::c_begin(sequence),
-                          container_algorithm_internal::c_end(sequence),
-                          std::forward<Compare>(comp));
-}
-
-// c_minmax_element()
-//
-// Container-based version of the <algorithm> `std::minmax_element()` function
-// to return a pair of iterators pointing to the elements containing the
-// smallest and largest values, respectively, using `operator<` to make the
-// comparisons.
-template <typename C>
-container_algorithm_internal::ContainerIterPairType<C, C>
-c_minmax_element(C& c) {
-  return std::minmax_element(container_algorithm_internal::c_begin(c),
-                             container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_minmax_element() for performing `comp` comparisons other than
-// `operator<`.
-template <typename C, typename Compare>
-container_algorithm_internal::ContainerIterPairType<C, C>
-c_minmax_element(C& c, Compare&& comp) {
-  return std::minmax_element(container_algorithm_internal::c_begin(c),
-                             container_algorithm_internal::c_end(c),
-                             std::forward<Compare>(comp));
-}
-
-//------------------------------------------------------------------------------
-//  <algorithm> Lexicographical Comparisons
-//------------------------------------------------------------------------------
-
-// c_lexicographical_compare()
-//
-// Container-based version of the <algorithm> `std::lexicographical_compare()`
-// function to lexicographically compare (e.g. sort words alphabetically) two
-// container sequences. The comparison is performed using `operator<`. Note
-// that capital letters ("A-Z") have ASCII values less than lowercase letters
-// ("a-z").
-template <typename Sequence1, typename Sequence2>
-bool c_lexicographical_compare(Sequence1&& sequence1, Sequence2&& sequence2) {
-  return std::lexicographical_compare(
-      container_algorithm_internal::c_begin(sequence1),
-      container_algorithm_internal::c_end(sequence1),
-      container_algorithm_internal::c_begin(sequence2),
-      container_algorithm_internal::c_end(sequence2));
-}
-
-// Overload of c_lexicographical_compare() for performing a lexicographical
-// comparison using a `comp` operator instead of `operator<`.
-template <typename Sequence1, typename Sequence2, typename Compare>
-bool c_lexicographical_compare(Sequence1&& sequence1, Sequence2&& sequence2,
-                               Compare&& comp) {
-  return std::lexicographical_compare(
-      container_algorithm_internal::c_begin(sequence1),
-      container_algorithm_internal::c_end(sequence1),
-      container_algorithm_internal::c_begin(sequence2),
-      container_algorithm_internal::c_end(sequence2),
-      std::forward<Compare>(comp));
-}
-
-// c_next_permutation()
-//
-// Container-based version of the <algorithm> `std::next_permutation()` function
-// to rearrange a container's elements into the next lexicographically greater
-// permutation.
-template <typename C>
-bool c_next_permutation(C& c) {
-  return std::next_permutation(container_algorithm_internal::c_begin(c),
-                               container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_next_permutation() for performing a lexicographical
-// comparison using a `comp` operator instead of `operator<`.
-template <typename C, typename Compare>
-bool c_next_permutation(C& c, Compare&& comp) {
-  return std::next_permutation(container_algorithm_internal::c_begin(c),
-                               container_algorithm_internal::c_end(c),
-                               std::forward<Compare>(comp));
-}
-
-// c_prev_permutation()
-//
-// Container-based version of the <algorithm> `std::prev_permutation()` function
-// to rearrange a container's elements into the next lexicographically lesser
-// permutation.
-template <typename C>
-bool c_prev_permutation(C& c) {
-  return std::prev_permutation(container_algorithm_internal::c_begin(c),
-                               container_algorithm_internal::c_end(c));
-}
-
-// Overload of c_prev_permutation() for performing a lexicographical
-// comparison using a `comp` operator instead of `operator<`.
-template <typename C, typename Compare>
-bool c_prev_permutation(C& c, Compare&& comp) {
-  return std::prev_permutation(container_algorithm_internal::c_begin(c),
-                               container_algorithm_internal::c_end(c),
-                               std::forward<Compare>(comp));
-}
-
-//------------------------------------------------------------------------------
-// <numeric> algorithms
-//------------------------------------------------------------------------------
-
-// c_iota()
-//
-// Container-based version of the <algorithm> `std::iota()` function
-// to compute successive values of `value`, as if incremented with `++value`
-// after each element is written. and write them to the container.
-template <typename Sequence, typename T>
-void c_iota(Sequence& sequence, T&& value) {
-  std::iota(container_algorithm_internal::c_begin(sequence),
-            container_algorithm_internal::c_end(sequence),
-            std::forward<T>(value));
-}
-// c_accumulate()
-//
-// Container-based version of the <algorithm> `std::accumulate()` function
-// to accumulate the element values of a container to `init` and return that
-// accumulation by value.
-//
-// Note: Due to a language technicality this function has return type
-// absl::decay_t<T>. As a user of this function you can casually read
-// this as "returns T by value" and assume it does the right thing.
-template <typename Sequence, typename T>
-decay_t<T> c_accumulate(const Sequence& sequence, T&& init) {
-  return std::accumulate(container_algorithm_internal::c_begin(sequence),
-                         container_algorithm_internal::c_end(sequence),
-                         std::forward<T>(init));
-}
-
-// Overload of c_accumulate() for using a binary operations other than
-// addition for computing the accumulation.
-template <typename Sequence, typename T, typename BinaryOp>
-decay_t<T> c_accumulate(const Sequence& sequence, T&& init,
-                        BinaryOp&& binary_op) {
-  return std::accumulate(container_algorithm_internal::c_begin(sequence),
-                         container_algorithm_internal::c_end(sequence),
-                         std::forward<T>(init),
-                         std::forward<BinaryOp>(binary_op));
-}
-
-// c_inner_product()
-//
-// Container-based version of the <algorithm> `std::inner_product()` function
-// to compute the cumulative inner product of container element pairs.
-//
-// Note: Due to a language technicality this function has return type
-// absl::decay_t<T>. As a user of this function you can casually read
-// this as "returns T by value" and assume it does the right thing.
-template <typename Sequence1, typename Sequence2, typename T>
-decay_t<T> c_inner_product(const Sequence1& factors1, const Sequence2& factors2,
-                           T&& sum) {
-  return std::inner_product(container_algorithm_internal::c_begin(factors1),
-                            container_algorithm_internal::c_end(factors1),
-                            container_algorithm_internal::c_begin(factors2),
-                            std::forward<T>(sum));
-}
-
-// Overload of c_inner_product() for using binary operations other than
-// `operator+` (for computing the accumulation) and `operator*` (for computing
-// the product between the two container's element pair).
-template <typename Sequence1, typename Sequence2, typename T,
-          typename BinaryOp1, typename BinaryOp2>
-decay_t<T> c_inner_product(const Sequence1& factors1, const Sequence2& factors2,
-                           T&& sum, BinaryOp1&& op1, BinaryOp2&& op2) {
-  return std::inner_product(container_algorithm_internal::c_begin(factors1),
-                            container_algorithm_internal::c_end(factors1),
-                            container_algorithm_internal::c_begin(factors2),
-                            std::forward<T>(sum), std::forward<BinaryOp1>(op1),
-                            std::forward<BinaryOp2>(op2));
-}
-
-// c_adjacent_difference()
-//
-// Container-based version of the <algorithm> `std::adjacent_difference()`
-// function to compute the difference between each element and the one preceding
-// it and write it to an iterator.
-template <typename InputSequence, typename OutputIt>
-OutputIt c_adjacent_difference(const InputSequence& input,
-                               OutputIt output_first) {
-  return std::adjacent_difference(container_algorithm_internal::c_begin(input),
-                                  container_algorithm_internal::c_end(input),
-                                  output_first);
-}
-
-// Overload of c_adjacent_difference() for using a binary operation other than
-// subtraction to compute the adjacent difference.
-template <typename InputSequence, typename OutputIt, typename BinaryOp>
-OutputIt c_adjacent_difference(const InputSequence& input,
-                               OutputIt output_first, BinaryOp&& op) {
-  return std::adjacent_difference(container_algorithm_internal::c_begin(input),
-                                  container_algorithm_internal::c_end(input),
-                                  output_first, std::forward<BinaryOp>(op));
-}
-
-// c_partial_sum()
-//
-// Container-based version of the <algorithm> `std::partial_sum()` function
-// to compute the partial sum of the elements in a sequence and write them
-// to an iterator. The partial sum is the sum of all element values so far in
-// the sequence.
-template <typename InputSequence, typename OutputIt>
-OutputIt c_partial_sum(const InputSequence& input, OutputIt output_first) {
-  return std::partial_sum(container_algorithm_internal::c_begin(input),
-                          container_algorithm_internal::c_end(input),
-                          output_first);
-}
-
-// Overload of c_partial_sum() for using a binary operation other than addition
-// to compute the "partial sum".
-template <typename InputSequence, typename OutputIt, typename BinaryOp>
-OutputIt c_partial_sum(const InputSequence& input, OutputIt output_first,
-                       BinaryOp&& op) {
-  return std::partial_sum(container_algorithm_internal::c_begin(input),
-                          container_algorithm_internal::c_end(input),
-                          output_first, std::forward<BinaryOp>(op));
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_ALGORITHM_CONTAINER_H_
diff --git a/third_party/abseil/absl/algorithm/container_test.cc b/third_party/abseil/absl/algorithm/container_test.cc
deleted file mode 100644
index 605afc8..0000000
--- a/third_party/abseil/absl/algorithm/container_test.cc
+++ /dev/null
@@ -1,1124 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/algorithm/container.h"
-
-#include <functional>
-#include <initializer_list>
-#include <iterator>
-#include <list>
-#include <memory>
-#include <ostream>
-#include <random>
-#include <set>
-#include <unordered_set>
-#include <utility>
-#include <valarray>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/casts.h"
-#include "absl/base/macros.h"
-#include "absl/memory/memory.h"
-#include "absl/types/span.h"
-
-namespace {
-
-using ::testing::Each;
-using ::testing::ElementsAre;
-using ::testing::Gt;
-using ::testing::IsNull;
-using ::testing::Lt;
-using ::testing::Pointee;
-using ::testing::Truly;
-using ::testing::UnorderedElementsAre;
-
-// Most of these tests just check that the code compiles, not that it
-// does the right thing. That's fine since the functions just forward
-// to the STL implementation.
-class NonMutatingTest : public testing::Test {
- protected:
-  std::unordered_set<int> container_ = {1, 2, 3};
-  std::list<int> sequence_ = {1, 2, 3};
-  std::vector<int> vector_ = {1, 2, 3};
-  int array_[3] = {1, 2, 3};
-};
-
-struct AccumulateCalls {
-  void operator()(int value) { calls.push_back(value); }
-  std::vector<int> calls;
-};
-
-bool Predicate(int value) { return value < 3; }
-bool BinPredicate(int v1, int v2) { return v1 < v2; }
-bool Equals(int v1, int v2) { return v1 == v2; }
-bool IsOdd(int x) { return x % 2 != 0; }
-
-TEST_F(NonMutatingTest, Distance) {
-  EXPECT_EQ(container_.size(), absl::c_distance(container_));
-  EXPECT_EQ(sequence_.size(), absl::c_distance(sequence_));
-  EXPECT_EQ(vector_.size(), absl::c_distance(vector_));
-  EXPECT_EQ(ABSL_ARRAYSIZE(array_), absl::c_distance(array_));
-
-  // Works with a temporary argument.
-  EXPECT_EQ(vector_.size(), absl::c_distance(std::vector<int>(vector_)));
-}
-
-TEST_F(NonMutatingTest, Distance_OverloadedBeginEnd) {
-  // Works with classes which have custom ADL-selected overloads of std::begin
-  // and std::end.
-  std::initializer_list<int> a = {1, 2, 3};
-  std::valarray<int> b = {1, 2, 3};
-  EXPECT_EQ(3, absl::c_distance(a));
-  EXPECT_EQ(3, absl::c_distance(b));
-
-  // It is assumed that other c_* functions use the same mechanism for
-  // ADL-selecting begin/end overloads.
-}
-
-TEST_F(NonMutatingTest, ForEach) {
-  AccumulateCalls c = absl::c_for_each(container_, AccumulateCalls());
-  // Don't rely on the unordered_set's order.
-  std::sort(c.calls.begin(), c.calls.end());
-  EXPECT_EQ(vector_, c.calls);
-
-  // Works with temporary container, too.
-  AccumulateCalls c2 =
-      absl::c_for_each(std::unordered_set<int>(container_), AccumulateCalls());
-  std::sort(c2.calls.begin(), c2.calls.end());
-  EXPECT_EQ(vector_, c2.calls);
-}
-
-TEST_F(NonMutatingTest, FindReturnsCorrectType) {
-  auto it = absl::c_find(container_, 3);
-  EXPECT_EQ(3, *it);
-  absl::c_find(absl::implicit_cast<const std::list<int>&>(sequence_), 3);
-}
-
-TEST_F(NonMutatingTest, FindIf) { absl::c_find_if(container_, Predicate); }
-
-TEST_F(NonMutatingTest, FindIfNot) {
-  absl::c_find_if_not(container_, Predicate);
-}
-
-TEST_F(NonMutatingTest, FindEnd) {
-  absl::c_find_end(sequence_, vector_);
-  absl::c_find_end(vector_, sequence_);
-}
-
-TEST_F(NonMutatingTest, FindEndWithPredicate) {
-  absl::c_find_end(sequence_, vector_, BinPredicate);
-  absl::c_find_end(vector_, sequence_, BinPredicate);
-}
-
-TEST_F(NonMutatingTest, FindFirstOf) {
-  absl::c_find_first_of(container_, sequence_);
-  absl::c_find_first_of(sequence_, container_);
-}
-
-TEST_F(NonMutatingTest, FindFirstOfWithPredicate) {
-  absl::c_find_first_of(container_, sequence_, BinPredicate);
-  absl::c_find_first_of(sequence_, container_, BinPredicate);
-}
-
-TEST_F(NonMutatingTest, AdjacentFind) { absl::c_adjacent_find(sequence_); }
-
-TEST_F(NonMutatingTest, AdjacentFindWithPredicate) {
-  absl::c_adjacent_find(sequence_, BinPredicate);
-}
-
-TEST_F(NonMutatingTest, Count) { EXPECT_EQ(1, absl::c_count(container_, 3)); }
-
-TEST_F(NonMutatingTest, CountIf) {
-  EXPECT_EQ(2, absl::c_count_if(container_, Predicate));
-  const std::unordered_set<int>& const_container = container_;
-  EXPECT_EQ(2, absl::c_count_if(const_container, Predicate));
-}
-
-TEST_F(NonMutatingTest, Mismatch) {
-  // Testing necessary as absl::c_mismatch executes logic.
-  {
-    auto result = absl::c_mismatch(vector_, sequence_);
-    EXPECT_EQ(result.first, vector_.end());
-    EXPECT_EQ(result.second, sequence_.end());
-  }
-  {
-    auto result = absl::c_mismatch(sequence_, vector_);
-    EXPECT_EQ(result.first, sequence_.end());
-    EXPECT_EQ(result.second, vector_.end());
-  }
-
-  sequence_.back() = 5;
-  {
-    auto result = absl::c_mismatch(vector_, sequence_);
-    EXPECT_EQ(result.first, std::prev(vector_.end()));
-    EXPECT_EQ(result.second, std::prev(sequence_.end()));
-  }
-  {
-    auto result = absl::c_mismatch(sequence_, vector_);
-    EXPECT_EQ(result.first, std::prev(sequence_.end()));
-    EXPECT_EQ(result.second, std::prev(vector_.end()));
-  }
-
-  sequence_.pop_back();
-  {
-    auto result = absl::c_mismatch(vector_, sequence_);
-    EXPECT_EQ(result.first, std::prev(vector_.end()));
-    EXPECT_EQ(result.second, sequence_.end());
-  }
-  {
-    auto result = absl::c_mismatch(sequence_, vector_);
-    EXPECT_EQ(result.first, sequence_.end());
-    EXPECT_EQ(result.second, std::prev(vector_.end()));
-  }
-  {
-    struct NoNotEquals {
-      constexpr bool operator==(NoNotEquals) const { return true; }
-      constexpr bool operator!=(NoNotEquals) const = delete;
-    };
-    std::vector<NoNotEquals> first;
-    std::list<NoNotEquals> second;
-
-    // Check this still compiles.
-    absl::c_mismatch(first, second);
-  }
-}
-
-TEST_F(NonMutatingTest, MismatchWithPredicate) {
-  // Testing necessary as absl::c_mismatch executes logic.
-  {
-    auto result = absl::c_mismatch(vector_, sequence_, BinPredicate);
-    EXPECT_EQ(result.first, vector_.begin());
-    EXPECT_EQ(result.second, sequence_.begin());
-  }
-  {
-    auto result = absl::c_mismatch(sequence_, vector_, BinPredicate);
-    EXPECT_EQ(result.first, sequence_.begin());
-    EXPECT_EQ(result.second, vector_.begin());
-  }
-
-  sequence_.front() = 0;
-  {
-    auto result = absl::c_mismatch(vector_, sequence_, BinPredicate);
-    EXPECT_EQ(result.first, vector_.begin());
-    EXPECT_EQ(result.second, sequence_.begin());
-  }
-  {
-    auto result = absl::c_mismatch(sequence_, vector_, BinPredicate);
-    EXPECT_EQ(result.first, std::next(sequence_.begin()));
-    EXPECT_EQ(result.second, std::next(vector_.begin()));
-  }
-
-  sequence_.clear();
-  {
-    auto result = absl::c_mismatch(vector_, sequence_, BinPredicate);
-    EXPECT_EQ(result.first, vector_.begin());
-    EXPECT_EQ(result.second, sequence_.end());
-  }
-  {
-    auto result = absl::c_mismatch(sequence_, vector_, BinPredicate);
-    EXPECT_EQ(result.first, sequence_.end());
-    EXPECT_EQ(result.second, vector_.begin());
-  }
-}
-
-TEST_F(NonMutatingTest, Equal) {
-  EXPECT_TRUE(absl::c_equal(vector_, sequence_));
-  EXPECT_TRUE(absl::c_equal(sequence_, vector_));
-  EXPECT_TRUE(absl::c_equal(sequence_, array_));
-  EXPECT_TRUE(absl::c_equal(array_, vector_));
-
-  // Test that behavior appropriately differs from that of equal().
-  std::vector<int> vector_plus = {1, 2, 3};
-  vector_plus.push_back(4);
-  EXPECT_FALSE(absl::c_equal(vector_plus, sequence_));
-  EXPECT_FALSE(absl::c_equal(sequence_, vector_plus));
-  EXPECT_FALSE(absl::c_equal(array_, vector_plus));
-}
-
-TEST_F(NonMutatingTest, EqualWithPredicate) {
-  EXPECT_TRUE(absl::c_equal(vector_, sequence_, Equals));
-  EXPECT_TRUE(absl::c_equal(sequence_, vector_, Equals));
-  EXPECT_TRUE(absl::c_equal(array_, sequence_, Equals));
-  EXPECT_TRUE(absl::c_equal(vector_, array_, Equals));
-
-  // Test that behavior appropriately differs from that of equal().
-  std::vector<int> vector_plus = {1, 2, 3};
-  vector_plus.push_back(4);
-  EXPECT_FALSE(absl::c_equal(vector_plus, sequence_, Equals));
-  EXPECT_FALSE(absl::c_equal(sequence_, vector_plus, Equals));
-  EXPECT_FALSE(absl::c_equal(vector_plus, array_, Equals));
-}
-
-TEST_F(NonMutatingTest, IsPermutation) {
-  auto vector_permut_ = vector_;
-  std::next_permutation(vector_permut_.begin(), vector_permut_.end());
-  EXPECT_TRUE(absl::c_is_permutation(vector_permut_, sequence_));
-  EXPECT_TRUE(absl::c_is_permutation(sequence_, vector_permut_));
-
-  // Test that behavior appropriately differs from that of is_permutation().
-  std::vector<int> vector_plus = {1, 2, 3};
-  vector_plus.push_back(4);
-  EXPECT_FALSE(absl::c_is_permutation(vector_plus, sequence_));
-  EXPECT_FALSE(absl::c_is_permutation(sequence_, vector_plus));
-}
-
-TEST_F(NonMutatingTest, IsPermutationWithPredicate) {
-  auto vector_permut_ = vector_;
-  std::next_permutation(vector_permut_.begin(), vector_permut_.end());
-  EXPECT_TRUE(absl::c_is_permutation(vector_permut_, sequence_, Equals));
-  EXPECT_TRUE(absl::c_is_permutation(sequence_, vector_permut_, Equals));
-
-  // Test that behavior appropriately differs from that of is_permutation().
-  std::vector<int> vector_plus = {1, 2, 3};
-  vector_plus.push_back(4);
-  EXPECT_FALSE(absl::c_is_permutation(vector_plus, sequence_, Equals));
-  EXPECT_FALSE(absl::c_is_permutation(sequence_, vector_plus, Equals));
-}
-
-TEST_F(NonMutatingTest, Search) {
-  absl::c_search(sequence_, vector_);
-  absl::c_search(vector_, sequence_);
-  absl::c_search(array_, sequence_);
-}
-
-TEST_F(NonMutatingTest, SearchWithPredicate) {
-  absl::c_search(sequence_, vector_, BinPredicate);
-  absl::c_search(vector_, sequence_, BinPredicate);
-}
-
-TEST_F(NonMutatingTest, SearchN) { absl::c_search_n(sequence_, 3, 1); }
-
-TEST_F(NonMutatingTest, SearchNWithPredicate) {
-  absl::c_search_n(sequence_, 3, 1, BinPredicate);
-}
-
-TEST_F(NonMutatingTest, LowerBound) {
-  std::list<int>::iterator i = absl::c_lower_bound(sequence_, 3);
-  ASSERT_TRUE(i != sequence_.end());
-  EXPECT_EQ(2, std::distance(sequence_.begin(), i));
-  EXPECT_EQ(3, *i);
-}
-
-TEST_F(NonMutatingTest, LowerBoundWithPredicate) {
-  std::vector<int> v(vector_);
-  std::sort(v.begin(), v.end(), std::greater<int>());
-  std::vector<int>::iterator i = absl::c_lower_bound(v, 3, std::greater<int>());
-  EXPECT_TRUE(i == v.begin());
-  EXPECT_EQ(3, *i);
-}
-
-TEST_F(NonMutatingTest, UpperBound) {
-  std::list<int>::iterator i = absl::c_upper_bound(sequence_, 1);
-  ASSERT_TRUE(i != sequence_.end());
-  EXPECT_EQ(1, std::distance(sequence_.begin(), i));
-  EXPECT_EQ(2, *i);
-}
-
-TEST_F(NonMutatingTest, UpperBoundWithPredicate) {
-  std::vector<int> v(vector_);
-  std::sort(v.begin(), v.end(), std::greater<int>());
-  std::vector<int>::iterator i = absl::c_upper_bound(v, 1, std::greater<int>());
-  EXPECT_EQ(3, i - v.begin());
-  EXPECT_TRUE(i == v.end());
-}
-
-TEST_F(NonMutatingTest, EqualRange) {
-  std::pair<std::list<int>::iterator, std::list<int>::iterator> p =
-      absl::c_equal_range(sequence_, 2);
-  EXPECT_EQ(1, std::distance(sequence_.begin(), p.first));
-  EXPECT_EQ(2, std::distance(sequence_.begin(), p.second));
-}
-
-TEST_F(NonMutatingTest, EqualRangeArray) {
-  auto p = absl::c_equal_range(array_, 2);
-  EXPECT_EQ(1, std::distance(std::begin(array_), p.first));
-  EXPECT_EQ(2, std::distance(std::begin(array_), p.second));
-}
-
-TEST_F(NonMutatingTest, EqualRangeWithPredicate) {
-  std::vector<int> v(vector_);
-  std::sort(v.begin(), v.end(), std::greater<int>());
-  std::pair<std::vector<int>::iterator, std::vector<int>::iterator> p =
-      absl::c_equal_range(v, 2, std::greater<int>());
-  EXPECT_EQ(1, std::distance(v.begin(), p.first));
-  EXPECT_EQ(2, std::distance(v.begin(), p.second));
-}
-
-TEST_F(NonMutatingTest, BinarySearch) {
-  EXPECT_TRUE(absl::c_binary_search(vector_, 2));
-  EXPECT_TRUE(absl::c_binary_search(std::vector<int>(vector_), 2));
-}
-
-TEST_F(NonMutatingTest, BinarySearchWithPredicate) {
-  std::vector<int> v(vector_);
-  std::sort(v.begin(), v.end(), std::greater<int>());
-  EXPECT_TRUE(absl::c_binary_search(v, 2, std::greater<int>()));
-  EXPECT_TRUE(
-      absl::c_binary_search(std::vector<int>(v), 2, std::greater<int>()));
-}
-
-TEST_F(NonMutatingTest, MinElement) {
-  std::list<int>::iterator i = absl::c_min_element(sequence_);
-  ASSERT_TRUE(i != sequence_.end());
-  EXPECT_EQ(*i, 1);
-}
-
-TEST_F(NonMutatingTest, MinElementWithPredicate) {
-  std::list<int>::iterator i =
-      absl::c_min_element(sequence_, std::greater<int>());
-  ASSERT_TRUE(i != sequence_.end());
-  EXPECT_EQ(*i, 3);
-}
-
-TEST_F(NonMutatingTest, MaxElement) {
-  std::list<int>::iterator i = absl::c_max_element(sequence_);
-  ASSERT_TRUE(i != sequence_.end());
-  EXPECT_EQ(*i, 3);
-}
-
-TEST_F(NonMutatingTest, MaxElementWithPredicate) {
-  std::list<int>::iterator i =
-      absl::c_max_element(sequence_, std::greater<int>());
-  ASSERT_TRUE(i != sequence_.end());
-  EXPECT_EQ(*i, 1);
-}
-
-TEST_F(NonMutatingTest, LexicographicalCompare) {
-  EXPECT_FALSE(absl::c_lexicographical_compare(sequence_, sequence_));
-
-  std::vector<int> v;
-  v.push_back(1);
-  v.push_back(2);
-  v.push_back(4);
-
-  EXPECT_TRUE(absl::c_lexicographical_compare(sequence_, v));
-  EXPECT_TRUE(absl::c_lexicographical_compare(std::list<int>(sequence_), v));
-}
-
-TEST_F(NonMutatingTest, LexicographicalCopmareWithPredicate) {
-  EXPECT_FALSE(absl::c_lexicographical_compare(sequence_, sequence_,
-                                               std::greater<int>()));
-
-  std::vector<int> v;
-  v.push_back(1);
-  v.push_back(2);
-  v.push_back(4);
-
-  EXPECT_TRUE(
-      absl::c_lexicographical_compare(v, sequence_, std::greater<int>()));
-  EXPECT_TRUE(absl::c_lexicographical_compare(
-      std::vector<int>(v), std::list<int>(sequence_), std::greater<int>()));
-}
-
-TEST_F(NonMutatingTest, Includes) {
-  std::set<int> s(vector_.begin(), vector_.end());
-  s.insert(4);
-  EXPECT_TRUE(absl::c_includes(s, vector_));
-}
-
-TEST_F(NonMutatingTest, IncludesWithPredicate) {
-  std::vector<int> v = {3, 2, 1};
-  std::set<int, std::greater<int>> s(v.begin(), v.end());
-  s.insert(4);
-  EXPECT_TRUE(absl::c_includes(s, v, std::greater<int>()));
-}
-
-class NumericMutatingTest : public testing::Test {
- protected:
-  std::list<int> list_ = {1, 2, 3};
-  std::vector<int> output_;
-};
-
-TEST_F(NumericMutatingTest, Iota) {
-  absl::c_iota(list_, 5);
-  std::list<int> expected{5, 6, 7};
-  EXPECT_EQ(list_, expected);
-}
-
-TEST_F(NonMutatingTest, Accumulate) {
-  EXPECT_EQ(absl::c_accumulate(sequence_, 4), 1 + 2 + 3 + 4);
-}
-
-TEST_F(NonMutatingTest, AccumulateWithBinaryOp) {
-  EXPECT_EQ(absl::c_accumulate(sequence_, 4, std::multiplies<int>()),
-            1 * 2 * 3 * 4);
-}
-
-TEST_F(NonMutatingTest, AccumulateLvalueInit) {
-  int lvalue = 4;
-  EXPECT_EQ(absl::c_accumulate(sequence_, lvalue), 1 + 2 + 3 + 4);
-}
-
-TEST_F(NonMutatingTest, AccumulateWithBinaryOpLvalueInit) {
-  int lvalue = 4;
-  EXPECT_EQ(absl::c_accumulate(sequence_, lvalue, std::multiplies<int>()),
-            1 * 2 * 3 * 4);
-}
-
-TEST_F(NonMutatingTest, InnerProduct) {
-  EXPECT_EQ(absl::c_inner_product(sequence_, vector_, 1000),
-            1000 + 1 * 1 + 2 * 2 + 3 * 3);
-}
-
-TEST_F(NonMutatingTest, InnerProductWithBinaryOps) {
-  EXPECT_EQ(absl::c_inner_product(sequence_, vector_, 10,
-                                  std::multiplies<int>(), std::plus<int>()),
-            10 * (1 + 1) * (2 + 2) * (3 + 3));
-}
-
-TEST_F(NonMutatingTest, InnerProductLvalueInit) {
-  int lvalue = 1000;
-  EXPECT_EQ(absl::c_inner_product(sequence_, vector_, lvalue),
-            1000 + 1 * 1 + 2 * 2 + 3 * 3);
-}
-
-TEST_F(NonMutatingTest, InnerProductWithBinaryOpsLvalueInit) {
-  int lvalue = 10;
-  EXPECT_EQ(absl::c_inner_product(sequence_, vector_, lvalue,
-                                  std::multiplies<int>(), std::plus<int>()),
-            10 * (1 + 1) * (2 + 2) * (3 + 3));
-}
-
-TEST_F(NumericMutatingTest, AdjacentDifference) {
-  auto last = absl::c_adjacent_difference(list_, std::back_inserter(output_));
-  *last = 1000;
-  std::vector<int> expected{1, 2 - 1, 3 - 2, 1000};
-  EXPECT_EQ(output_, expected);
-}
-
-TEST_F(NumericMutatingTest, AdjacentDifferenceWithBinaryOp) {
-  auto last = absl::c_adjacent_difference(list_, std::back_inserter(output_),
-                                          std::multiplies<int>());
-  *last = 1000;
-  std::vector<int> expected{1, 2 * 1, 3 * 2, 1000};
-  EXPECT_EQ(output_, expected);
-}
-
-TEST_F(NumericMutatingTest, PartialSum) {
-  auto last = absl::c_partial_sum(list_, std::back_inserter(output_));
-  *last = 1000;
-  std::vector<int> expected{1, 1 + 2, 1 + 2 + 3, 1000};
-  EXPECT_EQ(output_, expected);
-}
-
-TEST_F(NumericMutatingTest, PartialSumWithBinaryOp) {
-  auto last = absl::c_partial_sum(list_, std::back_inserter(output_),
-                                  std::multiplies<int>());
-  *last = 1000;
-  std::vector<int> expected{1, 1 * 2, 1 * 2 * 3, 1000};
-  EXPECT_EQ(output_, expected);
-}
-
-TEST_F(NonMutatingTest, LinearSearch) {
-  EXPECT_TRUE(absl::c_linear_search(container_, 3));
-  EXPECT_FALSE(absl::c_linear_search(container_, 4));
-}
-
-TEST_F(NonMutatingTest, AllOf) {
-  const std::vector<int>& v = vector_;
-  EXPECT_FALSE(absl::c_all_of(v, [](int x) { return x > 1; }));
-  EXPECT_TRUE(absl::c_all_of(v, [](int x) { return x > 0; }));
-}
-
-TEST_F(NonMutatingTest, AnyOf) {
-  const std::vector<int>& v = vector_;
-  EXPECT_TRUE(absl::c_any_of(v, [](int x) { return x > 2; }));
-  EXPECT_FALSE(absl::c_any_of(v, [](int x) { return x > 5; }));
-}
-
-TEST_F(NonMutatingTest, NoneOf) {
-  const std::vector<int>& v = vector_;
-  EXPECT_FALSE(absl::c_none_of(v, [](int x) { return x > 2; }));
-  EXPECT_TRUE(absl::c_none_of(v, [](int x) { return x > 5; }));
-}
-
-TEST_F(NonMutatingTest, MinMaxElementLess) {
-  std::pair<std::vector<int>::const_iterator, std::vector<int>::const_iterator>
-      p = absl::c_minmax_element(vector_, std::less<int>());
-  EXPECT_TRUE(p.first == vector_.begin());
-  EXPECT_TRUE(p.second == vector_.begin() + 2);
-}
-
-TEST_F(NonMutatingTest, MinMaxElementGreater) {
-  std::pair<std::vector<int>::const_iterator, std::vector<int>::const_iterator>
-      p = absl::c_minmax_element(vector_, std::greater<int>());
-  EXPECT_TRUE(p.first == vector_.begin() + 2);
-  EXPECT_TRUE(p.second == vector_.begin());
-}
-
-TEST_F(NonMutatingTest, MinMaxElementNoPredicate) {
-  std::pair<std::vector<int>::const_iterator, std::vector<int>::const_iterator>
-      p = absl::c_minmax_element(vector_);
-  EXPECT_TRUE(p.first == vector_.begin());
-  EXPECT_TRUE(p.second == vector_.begin() + 2);
-}
-
-class SortingTest : public testing::Test {
- protected:
-  std::list<int> sorted_ = {1, 2, 3, 4};
-  std::list<int> unsorted_ = {2, 4, 1, 3};
-  std::list<int> reversed_ = {4, 3, 2, 1};
-};
-
-TEST_F(SortingTest, IsSorted) {
-  EXPECT_TRUE(absl::c_is_sorted(sorted_));
-  EXPECT_FALSE(absl::c_is_sorted(unsorted_));
-  EXPECT_FALSE(absl::c_is_sorted(reversed_));
-}
-
-TEST_F(SortingTest, IsSortedWithPredicate) {
-  EXPECT_FALSE(absl::c_is_sorted(sorted_, std::greater<int>()));
-  EXPECT_FALSE(absl::c_is_sorted(unsorted_, std::greater<int>()));
-  EXPECT_TRUE(absl::c_is_sorted(reversed_, std::greater<int>()));
-}
-
-TEST_F(SortingTest, IsSortedUntil) {
-  EXPECT_EQ(1, *absl::c_is_sorted_until(unsorted_));
-  EXPECT_EQ(4, *absl::c_is_sorted_until(unsorted_, std::greater<int>()));
-}
-
-TEST_F(SortingTest, NthElement) {
-  std::vector<int> unsorted = {2, 4, 1, 3};
-  absl::c_nth_element(unsorted, unsorted.begin() + 2);
-  EXPECT_THAT(unsorted, ElementsAre(Lt(3), Lt(3), 3, Gt(3)));
-  absl::c_nth_element(unsorted, unsorted.begin() + 2, std::greater<int>());
-  EXPECT_THAT(unsorted, ElementsAre(Gt(2), Gt(2), 2, Lt(2)));
-}
-
-TEST(MutatingTest, IsPartitioned) {
-  EXPECT_TRUE(
-      absl::c_is_partitioned(std::vector<int>{1, 3, 5, 2, 4, 6}, IsOdd));
-  EXPECT_FALSE(
-      absl::c_is_partitioned(std::vector<int>{1, 2, 3, 4, 5, 6}, IsOdd));
-  EXPECT_FALSE(
-      absl::c_is_partitioned(std::vector<int>{2, 4, 6, 1, 3, 5}, IsOdd));
-}
-
-TEST(MutatingTest, Partition) {
-  std::vector<int> actual = {1, 2, 3, 4, 5};
-  absl::c_partition(actual, IsOdd);
-  EXPECT_THAT(actual, Truly([](const std::vector<int>& c) {
-                return absl::c_is_partitioned(c, IsOdd);
-              }));
-}
-
-TEST(MutatingTest, StablePartition) {
-  std::vector<int> actual = {1, 2, 3, 4, 5};
-  absl::c_stable_partition(actual, IsOdd);
-  EXPECT_THAT(actual, ElementsAre(1, 3, 5, 2, 4));
-}
-
-TEST(MutatingTest, PartitionCopy) {
-  const std::vector<int> initial = {1, 2, 3, 4, 5};
-  std::vector<int> odds, evens;
-  auto ends = absl::c_partition_copy(initial, back_inserter(odds),
-                                     back_inserter(evens), IsOdd);
-  *ends.first = 7;
-  *ends.second = 6;
-  EXPECT_THAT(odds, ElementsAre(1, 3, 5, 7));
-  EXPECT_THAT(evens, ElementsAre(2, 4, 6));
-}
-
-TEST(MutatingTest, PartitionPoint) {
-  const std::vector<int> initial = {1, 3, 5, 2, 4};
-  auto middle = absl::c_partition_point(initial, IsOdd);
-  EXPECT_EQ(2, *middle);
-}
-
-TEST(MutatingTest, CopyMiddle) {
-  const std::vector<int> initial = {4, -1, -2, -3, 5};
-  const std::list<int> input = {1, 2, 3};
-  const std::vector<int> expected = {4, 1, 2, 3, 5};
-
-  std::list<int> test_list(initial.begin(), initial.end());
-  absl::c_copy(input, ++test_list.begin());
-  EXPECT_EQ(std::list<int>(expected.begin(), expected.end()), test_list);
-
-  std::vector<int> test_vector = initial;
-  absl::c_copy(input, test_vector.begin() + 1);
-  EXPECT_EQ(expected, test_vector);
-}
-
-TEST(MutatingTest, CopyFrontInserter) {
-  const std::list<int> initial = {4, 5};
-  const std::list<int> input = {1, 2, 3};
-  const std::list<int> expected = {3, 2, 1, 4, 5};
-
-  std::list<int> test_list = initial;
-  absl::c_copy(input, std::front_inserter(test_list));
-  EXPECT_EQ(expected, test_list);
-}
-
-TEST(MutatingTest, CopyBackInserter) {
-  const std::vector<int> initial = {4, 5};
-  const std::list<int> input = {1, 2, 3};
-  const std::vector<int> expected = {4, 5, 1, 2, 3};
-
-  std::list<int> test_list(initial.begin(), initial.end());
-  absl::c_copy(input, std::back_inserter(test_list));
-  EXPECT_EQ(std::list<int>(expected.begin(), expected.end()), test_list);
-
-  std::vector<int> test_vector = initial;
-  absl::c_copy(input, std::back_inserter(test_vector));
-  EXPECT_EQ(expected, test_vector);
-}
-
-TEST(MutatingTest, CopyN) {
-  const std::vector<int> initial = {1, 2, 3, 4, 5};
-  const std::vector<int> expected = {1, 2};
-  std::vector<int> actual;
-  absl::c_copy_n(initial, 2, back_inserter(actual));
-  EXPECT_EQ(expected, actual);
-}
-
-TEST(MutatingTest, CopyIf) {
-  const std::list<int> input = {1, 2, 3};
-  std::vector<int> output;
-  absl::c_copy_if(input, std::back_inserter(output),
-                  [](int i) { return i != 2; });
-  EXPECT_THAT(output, ElementsAre(1, 3));
-}
-
-TEST(MutatingTest, CopyBackward) {
-  std::vector<int> actual = {1, 2, 3, 4, 5};
-  std::vector<int> expected = {1, 2, 1, 2, 3};
-  absl::c_copy_backward(absl::MakeSpan(actual.data(), 3), actual.end());
-  EXPECT_EQ(expected, actual);
-}
-
-TEST(MutatingTest, Move) {
-  std::vector<std::unique_ptr<int>> src;
-  src.emplace_back(absl::make_unique<int>(1));
-  src.emplace_back(absl::make_unique<int>(2));
-  src.emplace_back(absl::make_unique<int>(3));
-  src.emplace_back(absl::make_unique<int>(4));
-  src.emplace_back(absl::make_unique<int>(5));
-
-  std::vector<std::unique_ptr<int>> dest = {};
-  absl::c_move(src, std::back_inserter(dest));
-  EXPECT_THAT(src, Each(IsNull()));
-  EXPECT_THAT(dest, ElementsAre(Pointee(1), Pointee(2), Pointee(3), Pointee(4),
-                                Pointee(5)));
-}
-
-TEST(MutatingTest, MoveBackward) {
-  std::vector<std::unique_ptr<int>> actual;
-  actual.emplace_back(absl::make_unique<int>(1));
-  actual.emplace_back(absl::make_unique<int>(2));
-  actual.emplace_back(absl::make_unique<int>(3));
-  actual.emplace_back(absl::make_unique<int>(4));
-  actual.emplace_back(absl::make_unique<int>(5));
-  auto subrange = absl::MakeSpan(actual.data(), 3);
-  absl::c_move_backward(subrange, actual.end());
-  EXPECT_THAT(actual, ElementsAre(IsNull(), IsNull(), Pointee(1), Pointee(2),
-                                  Pointee(3)));
-}
-
-TEST(MutatingTest, MoveWithRvalue) {
-  auto MakeRValueSrc = [] {
-    std::vector<std::unique_ptr<int>> src;
-    src.emplace_back(absl::make_unique<int>(1));
-    src.emplace_back(absl::make_unique<int>(2));
-    src.emplace_back(absl::make_unique<int>(3));
-    return src;
-  };
-
-  std::vector<std::unique_ptr<int>> dest = MakeRValueSrc();
-  absl::c_move(MakeRValueSrc(), std::back_inserter(dest));
-  EXPECT_THAT(dest, ElementsAre(Pointee(1), Pointee(2), Pointee(3), Pointee(1),
-                                Pointee(2), Pointee(3)));
-}
-
-TEST(MutatingTest, SwapRanges) {
-  std::vector<int> odds = {2, 4, 6};
-  std::vector<int> evens = {1, 3, 5};
-  absl::c_swap_ranges(odds, evens);
-  EXPECT_THAT(odds, ElementsAre(1, 3, 5));
-  EXPECT_THAT(evens, ElementsAre(2, 4, 6));
-
-  odds.pop_back();
-  absl::c_swap_ranges(odds, evens);
-  EXPECT_THAT(odds, ElementsAre(2, 4));
-  EXPECT_THAT(evens, ElementsAre(1, 3, 6));
-
-  absl::c_swap_ranges(evens, odds);
-  EXPECT_THAT(odds, ElementsAre(1, 3));
-  EXPECT_THAT(evens, ElementsAre(2, 4, 6));
-}
-
-TEST_F(NonMutatingTest, Transform) {
-  std::vector<int> x{0, 2, 4}, y, z;
-  auto end = absl::c_transform(x, back_inserter(y), std::negate<int>());
-  EXPECT_EQ(std::vector<int>({0, -2, -4}), y);
-  *end = 7;
-  EXPECT_EQ(std::vector<int>({0, -2, -4, 7}), y);
-
-  y = {1, 3, 0};
-  end = absl::c_transform(x, y, back_inserter(z), std::plus<int>());
-  EXPECT_EQ(std::vector<int>({1, 5, 4}), z);
-  *end = 7;
-  EXPECT_EQ(std::vector<int>({1, 5, 4, 7}), z);
-
-  z.clear();
-  y.pop_back();
-  end = absl::c_transform(x, y, std::back_inserter(z), std::plus<int>());
-  EXPECT_EQ(std::vector<int>({1, 5}), z);
-  *end = 7;
-  EXPECT_EQ(std::vector<int>({1, 5, 7}), z);
-
-  z.clear();
-  std::swap(x, y);
-  end = absl::c_transform(x, y, std::back_inserter(z), std::plus<int>());
-  EXPECT_EQ(std::vector<int>({1, 5}), z);
-  *end = 7;
-  EXPECT_EQ(std::vector<int>({1, 5, 7}), z);
-}
-
-TEST(MutatingTest, Replace) {
-  const std::vector<int> initial = {1, 2, 3, 1, 4, 5};
-  const std::vector<int> expected = {4, 2, 3, 4, 4, 5};
-
-  std::vector<int> test_vector = initial;
-  absl::c_replace(test_vector, 1, 4);
-  EXPECT_EQ(expected, test_vector);
-
-  std::list<int> test_list(initial.begin(), initial.end());
-  absl::c_replace(test_list, 1, 4);
-  EXPECT_EQ(std::list<int>(expected.begin(), expected.end()), test_list);
-}
-
-TEST(MutatingTest, ReplaceIf) {
-  std::vector<int> actual = {1, 2, 3, 4, 5};
-  const std::vector<int> expected = {0, 2, 0, 4, 0};
-
-  absl::c_replace_if(actual, IsOdd, 0);
-  EXPECT_EQ(expected, actual);
-}
-
-TEST(MutatingTest, ReplaceCopy) {
-  const std::vector<int> initial = {1, 2, 3, 1, 4, 5};
-  const std::vector<int> expected = {4, 2, 3, 4, 4, 5};
-
-  std::vector<int> actual;
-  absl::c_replace_copy(initial, back_inserter(actual), 1, 4);
-  EXPECT_EQ(expected, actual);
-}
-
-TEST(MutatingTest, Sort) {
-  std::vector<int> test_vector = {2, 3, 1, 4};
-  absl::c_sort(test_vector);
-  EXPECT_THAT(test_vector, ElementsAre(1, 2, 3, 4));
-}
-
-TEST(MutatingTest, SortWithPredicate) {
-  std::vector<int> test_vector = {2, 3, 1, 4};
-  absl::c_sort(test_vector, std::greater<int>());
-  EXPECT_THAT(test_vector, ElementsAre(4, 3, 2, 1));
-}
-
-// For absl::c_stable_sort tests. Needs an operator< that does not cover all
-// fields so that the test can check the sort preserves order of equal elements.
-struct Element {
-  int key;
-  int value;
-  friend bool operator<(const Element& e1, const Element& e2) {
-    return e1.key < e2.key;
-  }
-  // Make gmock print useful diagnostics.
-  friend std::ostream& operator<<(std::ostream& o, const Element& e) {
-    return o << "{" << e.key << ", " << e.value << "}";
-  }
-};
-
-MATCHER_P2(IsElement, key, value, "") {
-  return arg.key == key && arg.value == value;
-}
-
-TEST(MutatingTest, StableSort) {
-  std::vector<Element> test_vector = {{1, 1}, {2, 1}, {2, 0}, {1, 0}, {2, 2}};
-  absl::c_stable_sort(test_vector);
-  EXPECT_THAT(test_vector,
-              ElementsAre(IsElement(1, 1), IsElement(1, 0), IsElement(2, 1),
-                          IsElement(2, 0), IsElement(2, 2)));
-}
-
-TEST(MutatingTest, StableSortWithPredicate) {
-  std::vector<Element> test_vector = {{1, 1}, {2, 1}, {2, 0}, {1, 0}, {2, 2}};
-  absl::c_stable_sort(test_vector, [](const Element& e1, const Element& e2) {
-    return e2 < e1;
-  });
-  EXPECT_THAT(test_vector,
-              ElementsAre(IsElement(2, 1), IsElement(2, 0), IsElement(2, 2),
-                          IsElement(1, 1), IsElement(1, 0)));
-}
-
-TEST(MutatingTest, ReplaceCopyIf) {
-  const std::vector<int> initial = {1, 2, 3, 4, 5};
-  const std::vector<int> expected = {0, 2, 0, 4, 0};
-
-  std::vector<int> actual;
-  absl::c_replace_copy_if(initial, back_inserter(actual), IsOdd, 0);
-  EXPECT_EQ(expected, actual);
-}
-
-TEST(MutatingTest, Fill) {
-  std::vector<int> actual(5);
-  absl::c_fill(actual, 1);
-  EXPECT_THAT(actual, ElementsAre(1, 1, 1, 1, 1));
-}
-
-TEST(MutatingTest, FillN) {
-  std::vector<int> actual(5, 0);
-  absl::c_fill_n(actual, 2, 1);
-  EXPECT_THAT(actual, ElementsAre(1, 1, 0, 0, 0));
-}
-
-TEST(MutatingTest, Generate) {
-  std::vector<int> actual(5);
-  int x = 0;
-  absl::c_generate(actual, [&x]() { return ++x; });
-  EXPECT_THAT(actual, ElementsAre(1, 2, 3, 4, 5));
-}
-
-TEST(MutatingTest, GenerateN) {
-  std::vector<int> actual(5, 0);
-  int x = 0;
-  absl::c_generate_n(actual, 3, [&x]() { return ++x; });
-  EXPECT_THAT(actual, ElementsAre(1, 2, 3, 0, 0));
-}
-
-TEST(MutatingTest, RemoveCopy) {
-  std::vector<int> actual;
-  absl::c_remove_copy(std::vector<int>{1, 2, 3}, back_inserter(actual), 2);
-  EXPECT_THAT(actual, ElementsAre(1, 3));
-}
-
-TEST(MutatingTest, RemoveCopyIf) {
-  std::vector<int> actual;
-  absl::c_remove_copy_if(std::vector<int>{1, 2, 3}, back_inserter(actual),
-                         IsOdd);
-  EXPECT_THAT(actual, ElementsAre(2));
-}
-
-TEST(MutatingTest, UniqueCopy) {
-  std::vector<int> actual;
-  absl::c_unique_copy(std::vector<int>{1, 2, 2, 2, 3, 3, 2},
-                      back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(1, 2, 3, 2));
-}
-
-TEST(MutatingTest, UniqueCopyWithPredicate) {
-  std::vector<int> actual;
-  absl::c_unique_copy(std::vector<int>{1, 2, 3, -1, -2, -3, 1},
-                      back_inserter(actual),
-                      [](int x, int y) { return (x < 0) == (y < 0); });
-  EXPECT_THAT(actual, ElementsAre(1, -1, 1));
-}
-
-TEST(MutatingTest, Reverse) {
-  std::vector<int> test_vector = {1, 2, 3, 4};
-  absl::c_reverse(test_vector);
-  EXPECT_THAT(test_vector, ElementsAre(4, 3, 2, 1));
-
-  std::list<int> test_list = {1, 2, 3, 4};
-  absl::c_reverse(test_list);
-  EXPECT_THAT(test_list, ElementsAre(4, 3, 2, 1));
-}
-
-TEST(MutatingTest, ReverseCopy) {
-  std::vector<int> actual;
-  absl::c_reverse_copy(std::vector<int>{1, 2, 3, 4}, back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(4, 3, 2, 1));
-}
-
-TEST(MutatingTest, Rotate) {
-  std::vector<int> actual = {1, 2, 3, 4};
-  auto it = absl::c_rotate(actual, actual.begin() + 2);
-  EXPECT_THAT(actual, testing::ElementsAreArray({3, 4, 1, 2}));
-  EXPECT_EQ(*it, 1);
-}
-
-TEST(MutatingTest, RotateCopy) {
-  std::vector<int> initial = {1, 2, 3, 4};
-  std::vector<int> actual;
-  auto end =
-      absl::c_rotate_copy(initial, initial.begin() + 2, back_inserter(actual));
-  *end = 5;
-  EXPECT_THAT(actual, ElementsAre(3, 4, 1, 2, 5));
-}
-
-TEST(MutatingTest, Shuffle) {
-  std::vector<int> actual = {1, 2, 3, 4, 5};
-  absl::c_shuffle(actual, std::random_device());
-  EXPECT_THAT(actual, UnorderedElementsAre(1, 2, 3, 4, 5));
-}
-
-TEST(MutatingTest, PartialSort) {
-  std::vector<int> sequence{5, 3, 42, 0};
-  absl::c_partial_sort(sequence, sequence.begin() + 2);
-  EXPECT_THAT(absl::MakeSpan(sequence.data(), 2), ElementsAre(0, 3));
-  absl::c_partial_sort(sequence, sequence.begin() + 2, std::greater<int>());
-  EXPECT_THAT(absl::MakeSpan(sequence.data(), 2), ElementsAre(42, 5));
-}
-
-TEST(MutatingTest, PartialSortCopy) {
-  const std::vector<int> initial = {5, 3, 42, 0};
-  std::vector<int> actual(2);
-  absl::c_partial_sort_copy(initial, actual);
-  EXPECT_THAT(actual, ElementsAre(0, 3));
-  absl::c_partial_sort_copy(initial, actual, std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(42, 5));
-}
-
-TEST(MutatingTest, Merge) {
-  std::vector<int> actual;
-  absl::c_merge(std::vector<int>{1, 3, 5}, std::vector<int>{2, 4},
-                back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(1, 2, 3, 4, 5));
-}
-
-TEST(MutatingTest, MergeWithComparator) {
-  std::vector<int> actual;
-  absl::c_merge(std::vector<int>{5, 3, 1}, std::vector<int>{4, 2},
-                back_inserter(actual), std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(5, 4, 3, 2, 1));
-}
-
-TEST(MutatingTest, InplaceMerge) {
-  std::vector<int> actual = {1, 3, 5, 2, 4};
-  absl::c_inplace_merge(actual, actual.begin() + 3);
-  EXPECT_THAT(actual, ElementsAre(1, 2, 3, 4, 5));
-}
-
-TEST(MutatingTest, InplaceMergeWithComparator) {
-  std::vector<int> actual = {5, 3, 1, 4, 2};
-  absl::c_inplace_merge(actual, actual.begin() + 3, std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(5, 4, 3, 2, 1));
-}
-
-class SetOperationsTest : public testing::Test {
- protected:
-  std::vector<int> a_ = {1, 2, 3};
-  std::vector<int> b_ = {1, 3, 5};
-
-  std::vector<int> a_reversed_ = {3, 2, 1};
-  std::vector<int> b_reversed_ = {5, 3, 1};
-};
-
-TEST_F(SetOperationsTest, SetUnion) {
-  std::vector<int> actual;
-  absl::c_set_union(a_, b_, back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(1, 2, 3, 5));
-}
-
-TEST_F(SetOperationsTest, SetUnionWithComparator) {
-  std::vector<int> actual;
-  absl::c_set_union(a_reversed_, b_reversed_, back_inserter(actual),
-                    std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(5, 3, 2, 1));
-}
-
-TEST_F(SetOperationsTest, SetIntersection) {
-  std::vector<int> actual;
-  absl::c_set_intersection(a_, b_, back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(1, 3));
-}
-
-TEST_F(SetOperationsTest, SetIntersectionWithComparator) {
-  std::vector<int> actual;
-  absl::c_set_intersection(a_reversed_, b_reversed_, back_inserter(actual),
-                           std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(3, 1));
-}
-
-TEST_F(SetOperationsTest, SetDifference) {
-  std::vector<int> actual;
-  absl::c_set_difference(a_, b_, back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(2));
-}
-
-TEST_F(SetOperationsTest, SetDifferenceWithComparator) {
-  std::vector<int> actual;
-  absl::c_set_difference(a_reversed_, b_reversed_, back_inserter(actual),
-                         std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(2));
-}
-
-TEST_F(SetOperationsTest, SetSymmetricDifference) {
-  std::vector<int> actual;
-  absl::c_set_symmetric_difference(a_, b_, back_inserter(actual));
-  EXPECT_THAT(actual, ElementsAre(2, 5));
-}
-
-TEST_F(SetOperationsTest, SetSymmetricDifferenceWithComparator) {
-  std::vector<int> actual;
-  absl::c_set_symmetric_difference(a_reversed_, b_reversed_,
-                                   back_inserter(actual), std::greater<int>());
-  EXPECT_THAT(actual, ElementsAre(5, 2));
-}
-
-TEST(HeapOperationsTest, WithoutComparator) {
-  std::vector<int> heap = {1, 2, 3};
-  EXPECT_FALSE(absl::c_is_heap(heap));
-  absl::c_make_heap(heap);
-  EXPECT_TRUE(absl::c_is_heap(heap));
-  heap.push_back(4);
-  EXPECT_EQ(3, absl::c_is_heap_until(heap) - heap.begin());
-  absl::c_push_heap(heap);
-  EXPECT_EQ(4, heap[0]);
-  absl::c_pop_heap(heap);
-  EXPECT_EQ(4, heap[3]);
-  absl::c_make_heap(heap);
-  absl::c_sort_heap(heap);
-  EXPECT_THAT(heap, ElementsAre(1, 2, 3, 4));
-  EXPECT_FALSE(absl::c_is_heap(heap));
-}
-
-TEST(HeapOperationsTest, WithComparator) {
-  using greater = std::greater<int>;
-  std::vector<int> heap = {3, 2, 1};
-  EXPECT_FALSE(absl::c_is_heap(heap, greater()));
-  absl::c_make_heap(heap, greater());
-  EXPECT_TRUE(absl::c_is_heap(heap, greater()));
-  heap.push_back(0);
-  EXPECT_EQ(3, absl::c_is_heap_until(heap, greater()) - heap.begin());
-  absl::c_push_heap(heap, greater());
-  EXPECT_EQ(0, heap[0]);
-  absl::c_pop_heap(heap, greater());
-  EXPECT_EQ(0, heap[3]);
-  absl::c_make_heap(heap, greater());
-  absl::c_sort_heap(heap, greater());
-  EXPECT_THAT(heap, ElementsAre(3, 2, 1, 0));
-  EXPECT_FALSE(absl::c_is_heap(heap, greater()));
-}
-
-TEST(MutatingTest, PermutationOperations) {
-  std::vector<int> initial = {1, 2, 3, 4};
-  std::vector<int> permuted = initial;
-
-  absl::c_next_permutation(permuted);
-  EXPECT_TRUE(absl::c_is_permutation(initial, permuted));
-  EXPECT_TRUE(absl::c_is_permutation(initial, permuted, std::equal_to<int>()));
-
-  std::vector<int> permuted2 = initial;
-  absl::c_prev_permutation(permuted2, std::greater<int>());
-  EXPECT_EQ(permuted, permuted2);
-
-  absl::c_prev_permutation(permuted);
-  EXPECT_EQ(initial, permuted);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/algorithm/equal_benchmark.cc b/third_party/abseil/absl/algorithm/equal_benchmark.cc
deleted file mode 100644
index 7bf62c9..0000000
--- a/third_party/abseil/absl/algorithm/equal_benchmark.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdint>
-#include <cstring>
-
-#include "benchmark/benchmark.h"
-#include "absl/algorithm/algorithm.h"
-
-namespace {
-
-// The range of sequence sizes to benchmark.
-constexpr int kMinBenchmarkSize = 1024;
-constexpr int kMaxBenchmarkSize = 8 * 1024 * 1024;
-
-// A user-defined type for use in equality benchmarks. Note that we expect
-// std::memcmp to win for this type: libstdc++'s std::equal only defers to
-// memcmp for integral types. This is because it is not straightforward to
-// guarantee that std::memcmp would produce a result "as-if" compared by
-// operator== for other types (example gotchas: NaN floats, structs with
-// padding).
-struct EightBits {
-  explicit EightBits(int /* unused */) : data(0) {}
-  bool operator==(const EightBits& rhs) const { return data == rhs.data; }
-  uint8_t data;
-};
-
-template <typename T>
-void BM_absl_equal_benchmark(benchmark::State& state) {
-  std::vector<T> xs(state.range(0), T(0));
-  std::vector<T> ys = xs;
-  while (state.KeepRunning()) {
-    const bool same = absl::equal(xs.begin(), xs.end(), ys.begin(), ys.end());
-    benchmark::DoNotOptimize(same);
-  }
-}
-
-template <typename T>
-void BM_std_equal_benchmark(benchmark::State& state) {
-  std::vector<T> xs(state.range(0), T(0));
-  std::vector<T> ys = xs;
-  while (state.KeepRunning()) {
-    const bool same = std::equal(xs.begin(), xs.end(), ys.begin());
-    benchmark::DoNotOptimize(same);
-  }
-}
-
-template <typename T>
-void BM_memcmp_benchmark(benchmark::State& state) {
-  std::vector<T> xs(state.range(0), T(0));
-  std::vector<T> ys = xs;
-  while (state.KeepRunning()) {
-    const bool same =
-        std::memcmp(xs.data(), ys.data(), xs.size() * sizeof(T)) == 0;
-    benchmark::DoNotOptimize(same);
-  }
-}
-
-// The expectation is that the compiler should be able to elide the equality
-// comparison altogether for sufficiently simple types.
-template <typename T>
-void BM_absl_equal_self_benchmark(benchmark::State& state) {
-  std::vector<T> xs(state.range(0), T(0));
-  while (state.KeepRunning()) {
-    const bool same = absl::equal(xs.begin(), xs.end(), xs.begin(), xs.end());
-    benchmark::DoNotOptimize(same);
-  }
-}
-
-BENCHMARK_TEMPLATE(BM_absl_equal_benchmark, uint8_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_std_equal_benchmark, uint8_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_memcmp_benchmark, uint8_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_absl_equal_self_benchmark, uint8_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-
-BENCHMARK_TEMPLATE(BM_absl_equal_benchmark, uint16_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_std_equal_benchmark, uint16_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_memcmp_benchmark, uint16_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_absl_equal_self_benchmark, uint16_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-
-BENCHMARK_TEMPLATE(BM_absl_equal_benchmark, uint32_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_std_equal_benchmark, uint32_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_memcmp_benchmark, uint32_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_absl_equal_self_benchmark, uint32_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-
-BENCHMARK_TEMPLATE(BM_absl_equal_benchmark, uint64_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_std_equal_benchmark, uint64_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_memcmp_benchmark, uint64_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_absl_equal_self_benchmark, uint64_t)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-
-BENCHMARK_TEMPLATE(BM_absl_equal_benchmark, EightBits)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_std_equal_benchmark, EightBits)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_memcmp_benchmark, EightBits)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-BENCHMARK_TEMPLATE(BM_absl_equal_self_benchmark, EightBits)
-    ->Range(kMinBenchmarkSize, kMaxBenchmarkSize);
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/BUILD.bazel b/third_party/abseil/absl/base/BUILD.bazel
deleted file mode 100644
index a56620f..0000000
--- a/third_party/abseil/absl/base/BUILD.bazel
+++ /dev/null
@@ -1,795 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "atomic_hook",
-    hdrs = ["internal/atomic_hook.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        ":core_headers",
-    ],
-)
-
-cc_library(
-    name = "errno_saver",
-    hdrs = ["internal/errno_saver.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [":config"],
-)
-
-cc_library(
-    name = "log_severity",
-    srcs = ["log_severity.cc"],
-    hdrs = ["log_severity.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":core_headers",
-    ],
-)
-
-cc_library(
-    name = "raw_logging_internal",
-    srcs = ["internal/raw_logging.cc"],
-    hdrs = ["internal/raw_logging.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":atomic_hook",
-        ":config",
-        ":core_headers",
-        ":log_severity",
-    ],
-)
-
-cc_library(
-    name = "spinlock_wait",
-    srcs = [
-        "internal/spinlock_akaros.inc",
-        "internal/spinlock_linux.inc",
-        "internal/spinlock_posix.inc",
-        "internal/spinlock_wait.cc",
-        "internal/spinlock_win32.inc",
-    ],
-    hdrs = ["internal/spinlock_wait.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/base:__pkg__",
-    ],
-    deps = [
-        ":base_internal",
-        ":core_headers",
-        ":errno_saver",
-    ],
-)
-
-cc_library(
-    name = "config",
-    hdrs = [
-        "config.h",
-        "options.h",
-        "policy_checks.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-)
-
-cc_library(
-    name = "dynamic_annotations",
-    srcs = [
-        "internal/dynamic_annotations.h",
-    ],
-    hdrs = [
-        "dynamic_annotations.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":core_headers",
-    ],
-)
-
-cc_library(
-    name = "core_headers",
-    srcs = [
-        "internal/thread_annotations.h",
-    ],
-    hdrs = [
-        "attributes.h",
-        "const_init.h",
-        "macros.h",
-        "optimization.h",
-        "port.h",
-        "thread_annotations.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-    ],
-)
-
-cc_library(
-    name = "malloc_internal",
-    srcs = [
-        "internal/low_level_alloc.cc",
-    ],
-    hdrs = [
-        "internal/direct_mmap.h",
-        "internal/low_level_alloc.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = select({
-        "//absl:windows": [],
-        "//absl:wasm": [],
-        "//conditions:default": [],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//visibility:public",
-    ],
-    deps = [
-        ":base",
-        ":base_internal",
-        ":config",
-        ":core_headers",
-        ":dynamic_annotations",
-        ":raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "base_internal",
-    hdrs = [
-        "internal/hide_ptr.h",
-        "internal/identity.h",
-        "internal/inline_variable.h",
-        "internal/invoke.h",
-        "internal/scheduling_mode.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_library(
-    name = "base",
-    srcs = [
-        "internal/cycleclock.cc",
-        "internal/spinlock.cc",
-        "internal/sysinfo.cc",
-        "internal/thread_identity.cc",
-        "internal/unscaledcycleclock.cc",
-    ],
-    hdrs = [
-        "call_once.h",
-        "casts.h",
-        "internal/cycleclock.h",
-        "internal/low_level_scheduling.h",
-        "internal/per_thread_tls.h",
-        "internal/spinlock.h",
-        "internal/sysinfo.h",
-        "internal/thread_identity.h",
-        "internal/tsan_mutex_interface.h",
-        "internal/unscaledcycleclock.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = select({
-        "//absl:windows": [
-            "-DEFAULTLIB:advapi32.lib",
-        ],
-        "//absl:wasm": [],
-        "//conditions:default": [],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":atomic_hook",
-        ":base_internal",
-        ":config",
-        ":core_headers",
-        ":dynamic_annotations",
-        ":log_severity",
-        ":raw_logging_internal",
-        ":spinlock_wait",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_library(
-    name = "atomic_hook_test_helper",
-    testonly = 1,
-    srcs = ["internal/atomic_hook_test_helper.cc"],
-    hdrs = ["internal/atomic_hook_test_helper.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":atomic_hook",
-        ":core_headers",
-    ],
-)
-
-cc_test(
-    name = "atomic_hook_test",
-    size = "small",
-    srcs = ["internal/atomic_hook_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":atomic_hook",
-        ":atomic_hook_test_helper",
-        ":core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "bit_cast_test",
-    size = "small",
-    srcs = [
-        "bit_cast_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base",
-        ":core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "throw_delegate",
-    srcs = ["internal/throw_delegate.cc"],
-    hdrs = ["internal/throw_delegate.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        ":raw_logging_internal",
-    ],
-)
-
-cc_test(
-    name = "throw_delegate_test",
-    srcs = ["throw_delegate_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":throw_delegate",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "errno_saver_test",
-    size = "small",
-    srcs = ["internal/errno_saver_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":errno_saver",
-        ":strerror",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "exception_testing",
-    testonly = 1,
-    hdrs = ["internal/exception_testing.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "pretty_function",
-    hdrs = ["internal/pretty_function.h"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//absl:__subpackages__"],
-)
-
-cc_library(
-    name = "exception_safety_testing",
-    testonly = 1,
-    srcs = ["internal/exception_safety_testing.cc"],
-    hdrs = ["internal/exception_safety_testing.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":pretty_function",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/utility",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "exception_safety_testing_test",
-    srcs = ["exception_safety_testing_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":exception_safety_testing",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "inline_variable_test",
-    size = "small",
-    srcs = [
-        "inline_variable_test.cc",
-        "inline_variable_test_a.cc",
-        "inline_variable_test_b.cc",
-        "internal/inline_variable_testing.h",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "invoke_test",
-    size = "small",
-    srcs = ["invoke_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base_internal",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-# Common test library made available for use in non-absl code that overrides
-# AbslInternalSpinLockDelay and AbslInternalSpinLockWake.
-cc_library(
-    name = "spinlock_test_common",
-    testonly = 1,
-    srcs = ["spinlock_test_common.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base",
-        ":base_internal",
-        ":config",
-        ":core_headers",
-        "//absl/synchronization",
-        "@com_google_googletest//:gtest",
-    ],
-    alwayslink = 1,
-)
-
-cc_test(
-    name = "spinlock_test",
-    size = "medium",
-    srcs = ["spinlock_test_common.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base",
-        ":base_internal",
-        ":config",
-        ":core_headers",
-        "//absl/synchronization",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "spinlock_benchmark_common",
-    testonly = 1,
-    srcs = ["internal/spinlock_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/base:__pkg__",
-    ],
-    deps = [
-        ":base",
-        ":base_internal",
-        ":raw_logging_internal",
-        "//absl/synchronization",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-    alwayslink = 1,
-)
-
-cc_binary(
-    name = "spinlock_benchmark",
-    testonly = 1,
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":spinlock_benchmark_common",
-    ],
-)
-
-cc_library(
-    name = "endian",
-    hdrs = [
-        "internal/endian.h",
-        "internal/unaligned_access.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":core_headers",
-    ],
-)
-
-cc_test(
-    name = "endian_test",
-    srcs = ["internal/endian_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":config",
-        ":endian",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "config_test",
-    srcs = ["config_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        "//absl/synchronization:thread_pool",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "call_once_test",
-    srcs = ["call_once_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base",
-        ":core_headers",
-        "//absl/synchronization",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "raw_logging_test",
-    srcs = ["raw_logging_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":raw_logging_internal",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "sysinfo_test",
-    size = "small",
-    srcs = ["internal/sysinfo_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base",
-        "//absl/synchronization",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "low_level_alloc_test",
-    size = "medium",
-    srcs = ["internal/low_level_alloc_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = [
-        "no_test_ios_x86_64",
-    ],
-    deps = [
-        ":malloc_internal",
-        "//absl/container:node_hash_map",
-    ],
-)
-
-cc_test(
-    name = "thread_identity_test",
-    size = "small",
-    srcs = ["internal/thread_identity_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":base",
-        ":core_headers",
-        "//absl/synchronization",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "thread_identity_benchmark",
-    srcs = ["internal/thread_identity_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":base",
-        "//absl/synchronization",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "exponential_biased",
-    srcs = ["internal/exponential_biased.cc"],
-    hdrs = ["internal/exponential_biased.h"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        ":core_headers",
-    ],
-)
-
-cc_test(
-    name = "exponential_biased_test",
-    size = "small",
-    srcs = ["internal/exponential_biased_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":exponential_biased",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "periodic_sampler",
-    srcs = ["internal/periodic_sampler.cc"],
-    hdrs = ["internal/periodic_sampler.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":core_headers",
-        ":exponential_biased",
-    ],
-)
-
-cc_test(
-    name = "periodic_sampler_test",
-    size = "small",
-    srcs = ["internal/periodic_sampler_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":core_headers",
-        ":periodic_sampler",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "periodic_sampler_benchmark",
-    testonly = 1,
-    srcs = ["internal/periodic_sampler_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":core_headers",
-        ":periodic_sampler",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "scoped_set_env",
-    testonly = 1,
-    srcs = ["internal/scoped_set_env.cc"],
-    hdrs = ["internal/scoped_set_env.h"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        ":raw_logging_internal",
-    ],
-)
-
-cc_test(
-    name = "scoped_set_env_test",
-    size = "small",
-    srcs = ["internal/scoped_set_env_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":scoped_set_env",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "log_severity_test",
-    size = "small",
-    srcs = ["log_severity_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":log_severity",
-        "//absl/flags:flag_internal",
-        "//absl/flags:marshalling",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "strerror",
-    srcs = ["internal/strerror.cc"],
-    hdrs = ["internal/strerror.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-        ":core_headers",
-        ":errno_saver",
-    ],
-)
-
-cc_test(
-    name = "strerror_test",
-    size = "small",
-    srcs = ["internal/strerror_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":strerror",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "strerror_benchmark",
-    testonly = 1,
-    srcs = ["internal/strerror_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strerror",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "fast_type_id",
-    hdrs = ["internal/fast_type_id.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":config",
-    ],
-)
-
-cc_test(
-    name = "fast_type_id_test",
-    size = "small",
-    srcs = ["internal/fast_type_id_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":fast_type_id",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "unique_small_name_test",
-    size = "small",
-    srcs = ["internal/unique_small_name_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    linkstatic = 1,
-    deps = [
-        ":core_headers",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "optimization_test",
-    size = "small",
-    srcs = ["optimization_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":core_headers",
-        "//absl/types:optional",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/base/CMakeLists.txt b/third_party/abseil/absl/base/CMakeLists.txt
deleted file mode 100644
index 3d930b8..0000000
--- a/third_party/abseil/absl/base/CMakeLists.txt
+++ /dev/null
@@ -1,693 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-find_library(LIBRT rt)
-
-absl_cc_library(
-  NAME
-    atomic_hook
-  HDRS
-    "internal/atomic_hook.h"
-  DEPS
-    absl::config
-    absl::core_headers
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    errno_saver
-  HDRS
-    "internal/errno_saver.h"
-  DEPS
-    absl::config
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    log_severity
-  HDRS
-    "log_severity.h"
-  SRCS
-    "log_severity.cc"
-  DEPS
-    absl::core_headers
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    raw_logging_internal
-  HDRS
-    "internal/raw_logging.h"
-  SRCS
-    "internal/raw_logging.cc"
-  DEPS
-    absl::atomic_hook
-    absl::config
-    absl::core_headers
-    absl::log_severity
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    spinlock_wait
-  HDRS
-    "internal/spinlock_wait.h"
-  SRCS
-    "internal/spinlock_akaros.inc"
-    "internal/spinlock_linux.inc"
-    "internal/spinlock_posix.inc"
-    "internal/spinlock_wait.cc"
-    "internal/spinlock_win32.inc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base_internal
-    absl::core_headers
-    absl::errno_saver
-)
-
-absl_cc_library(
-  NAME
-    config
-  HDRS
-    "config.h"
-    "options.h"
-    "policy_checks.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    dynamic_annotations
-  HDRS
-    "dynamic_annotations.h"
-  SRCS
-    "internal/dynamic_annotations.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    core_headers
-  HDRS
-    "attributes.h"
-    "const_init.h"
-    "macros.h"
-    "optimization.h"
-    "port.h"
-    "thread_annotations.h"
-    "internal/thread_annotations.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    malloc_internal
-  HDRS
-    "internal/direct_mmap.h"
-    "internal/low_level_alloc.h"
-  SRCS
-    "internal/low_level_alloc.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::dynamic_annotations
-    absl::raw_logging_internal
-    Threads::Threads
-)
-
-absl_cc_library(
-  NAME
-    base_internal
-  HDRS
-    "internal/hide_ptr.h"
-    "internal/identity.h"
-    "internal/inline_variable.h"
-    "internal/invoke.h"
-    "internal/scheduling_mode.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::type_traits
-)
-
-absl_cc_library(
-  NAME
-    base
-  HDRS
-    "call_once.h"
-    "casts.h"
-    "internal/cycleclock.h"
-    "internal/low_level_scheduling.h"
-    "internal/per_thread_tls.h"
-    "internal/spinlock.h"
-    "internal/sysinfo.h"
-    "internal/thread_identity.h"
-    "internal/tsan_mutex_interface.h"
-    "internal/unscaledcycleclock.h"
-  SRCS
-    "internal/cycleclock.cc"
-    "internal/spinlock.cc"
-    "internal/sysinfo.cc"
-    "internal/thread_identity.cc"
-    "internal/unscaledcycleclock.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-    $<$<BOOL:${LIBRT}>:-lrt>
-    $<$<BOOL:${MINGW}>:"advapi32">
-  DEPS
-    absl::atomic_hook
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::dynamic_annotations
-    absl::log_severity
-    absl::raw_logging_internal
-    absl::spinlock_wait
-    absl::type_traits
-    Threads::Threads
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    throw_delegate
-  HDRS
-    "internal/throw_delegate.h"
-  SRCS
-    "internal/throw_delegate.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::raw_logging_internal
-)
-
-absl_cc_library(
-  NAME
-    exception_testing
-  HDRS
-    "internal/exception_testing.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    gtest
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    pretty_function
-  HDRS
-    "internal/pretty_function.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    exception_safety_testing
-  HDRS
-    "internal/exception_safety_testing.h"
-  SRCS
-    "internal/exception_safety_testing.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::config
-    absl::pretty_function
-    absl::memory
-    absl::meta
-    absl::strings
-    absl::utility
-    gtest
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    absl_exception_safety_testing_test
-  SRCS
-    "exception_safety_testing_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::exception_safety_testing
-    absl::memory
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    atomic_hook_test_helper
-  SRCS
-    "internal/atomic_hook_test_helper.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::atomic_hook
-    absl::core_headers
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    atomic_hook_test
-  SRCS
-    "internal/atomic_hook_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::atomic_hook_test_helper
-    absl::atomic_hook
-    absl::core_headers
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    bit_cast_test
-  SRCS
-    "bit_cast_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::core_headers
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    errno_saver_test
-  SRCS
-    "internal/errno_saver_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::errno_saver
-    absl::strerror
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    throw_delegate_test
-  SRCS
-    "throw_delegate_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::config
-    absl::throw_delegate
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    inline_variable_test
-  SRCS
-    "internal/inline_variable_testing.h"
-    "inline_variable_test.cc"
-    "inline_variable_test_a.cc"
-    "inline_variable_test_b.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base_internal
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    invoke_test
-  SRCS
-    "invoke_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base_internal
-    absl::memory
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    spinlock_test_common
-  SRCS
-    "spinlock_test_common.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::config
-    absl::base_internal
-    absl::core_headers
-    absl::synchronization
-    gtest
-  TESTONLY
-)
-
-# On bazel BUILD this target use "alwayslink = 1" which is not implemented here
-absl_cc_test(
-  NAME
-    spinlock_test
-  SRCS
-    "spinlock_test_common.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::synchronization
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    endian
-  HDRS
-    "internal/endian.h"
-    "internal/unaligned_access.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    endian_test
-  SRCS
-    "internal/endian_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::config
-    absl::endian
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    config_test
-  SRCS
-    "config_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::config
-    absl::synchronization
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    call_once_test
-  SRCS
-    "call_once_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::core_headers
-    absl::synchronization
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    raw_logging_test
-  SRCS
-    "raw_logging_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::raw_logging_internal
-    absl::strings
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    sysinfo_test
-  SRCS
-    "internal/sysinfo_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::synchronization
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    low_level_alloc_test
-  SRCS
-    "internal/low_level_alloc_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::malloc_internal
-    absl::node_hash_map
-    Threads::Threads
-)
-
-absl_cc_test(
-  NAME
-    thread_identity_test
-  SRCS
-    "internal/thread_identity_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::core_headers
-    absl::synchronization
-    Threads::Threads
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    exponential_biased
-  SRCS
-    "internal/exponential_biased.cc"
-  HDRS
-    "internal/exponential_biased.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-)
-
-absl_cc_test(
-  NAME
-    exponential_biased_test
-  SRCS
-    "internal/exponential_biased_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::exponential_biased
-    absl::strings
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    periodic_sampler
-  SRCS
-    "internal/periodic_sampler.cc"
-  HDRS
-    "internal/periodic_sampler.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::core_headers
-    absl::exponential_biased
-)
-
-absl_cc_test(
-  NAME
-    periodic_sampler_test
-  SRCS
-    "internal/periodic_sampler_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::core_headers
-    absl::periodic_sampler
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    scoped_set_env
-  SRCS
-    "internal/scoped_set_env.cc"
-  HDRS
-    "internal/scoped_set_env.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::raw_logging_internal
-)
-
-absl_cc_test(
-  NAME
-    scoped_set_env_test
-  SRCS
-    "internal/scoped_set_env_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::scoped_set_env
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    cmake_thread_test
-  SRCS
-    "internal/cmake_thread_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-)
-
-absl_cc_test(
-  NAME
-    log_severity_test
-  SRCS
-    "log_severity_test.cc"
-  DEPS
-    absl::flags_internal
-    absl::flags_marshalling
-    absl::log_severity
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    strerror
-  SRCS
-    "internal/strerror.cc"
-  HDRS
-    "internal/strerror.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::errno_saver
-)
-
-absl_cc_test(
-  NAME
-    strerror_test
-  SRCS
-    "internal/strerror_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strerror
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    fast_type_id
-  HDRS
-    "internal/fast_type_id.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-)
-
-absl_cc_test(
-  NAME
-    fast_type_id_test
-  SRCS
-    "internal/fast_type_id_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::fast_type_id
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    optimization_test
-  SRCS
-    "optimization_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::core_headers
-    absl::optional
-    gtest_main
-)
diff --git a/third_party/abseil/absl/base/attributes.h b/third_party/abseil/absl/base/attributes.h
deleted file mode 100644
index 0ba1e7d..0000000
--- a/third_party/abseil/absl/base/attributes.h
+++ /dev/null
@@ -1,683 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This header file defines macros for declaring attributes for functions,
-// types, and variables.
-//
-// These macros are used within Abseil and allow the compiler to optimize, where
-// applicable, certain function calls.
-//
-// This file is used for both C and C++!
-//
-// Most macros here are exposing GCC or Clang features, and are stubbed out for
-// other compilers.
-//
-// GCC attributes documentation:
-//   https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Function-Attributes.html
-//   https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Variable-Attributes.html
-//   https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Type-Attributes.html
-//
-// Most attributes in this file are already supported by GCC 4.7. However, some
-// of them are not supported in older version of Clang. Thus, we check
-// `__has_attribute()` first. If the check fails, we check if we are on GCC and
-// assume the attribute exists on GCC (which is verified on GCC 4.7).
-
-#ifndef ABSL_BASE_ATTRIBUTES_H_
-#define ABSL_BASE_ATTRIBUTES_H_
-
-#include "absl/base/config.h"
-
-// ABSL_HAVE_ATTRIBUTE
-//
-// A function-like feature checking macro that is a wrapper around
-// `__has_attribute`, which is defined by GCC 5+ and Clang and evaluates to a
-// nonzero constant integer if the attribute is supported or 0 if not.
-//
-// It evaluates to zero if `__has_attribute` is not defined by the compiler.
-//
-// GCC: https://gcc.gnu.org/gcc-5/changes.html
-// Clang: https://clang.llvm.org/docs/LanguageExtensions.html
-#ifdef __has_attribute
-#define ABSL_HAVE_ATTRIBUTE(x) __has_attribute(x)
-#else
-#define ABSL_HAVE_ATTRIBUTE(x) 0
-#endif
-
-// ABSL_HAVE_CPP_ATTRIBUTE
-//
-// A function-like feature checking macro that accepts C++11 style attributes.
-// It's a wrapper around `__has_cpp_attribute`, defined by ISO C++ SD-6
-// (https://en.cppreference.com/w/cpp/experimental/feature_test). If we don't
-// find `__has_cpp_attribute`, will evaluate to 0.
-#if defined(__cplusplus) && defined(__has_cpp_attribute)
-// NOTE: requiring __cplusplus above should not be necessary, but
-// works around https://bugs.llvm.org/show_bug.cgi?id=23435.
-#define ABSL_HAVE_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
-#else
-#define ABSL_HAVE_CPP_ATTRIBUTE(x) 0
-#endif
-
-// -----------------------------------------------------------------------------
-// Function Attributes
-// -----------------------------------------------------------------------------
-//
-// GCC: https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
-// Clang: https://clang.llvm.org/docs/AttributeReference.html
-
-// ABSL_PRINTF_ATTRIBUTE
-// ABSL_SCANF_ATTRIBUTE
-//
-// Tells the compiler to perform `printf` format string checking if the
-// compiler supports it; see the 'format' attribute in
-// <https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Function-Attributes.html>.
-//
-// Note: As the GCC manual states, "[s]ince non-static C++ methods
-// have an implicit 'this' argument, the arguments of such methods
-// should be counted from two, not one."
-#if ABSL_HAVE_ATTRIBUTE(format) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_PRINTF_ATTRIBUTE(string_index, first_to_check) \
-  __attribute__((__format__(__printf__, string_index, first_to_check)))
-#define ABSL_SCANF_ATTRIBUTE(string_index, first_to_check) \
-  __attribute__((__format__(__scanf__, string_index, first_to_check)))
-#else
-#define ABSL_PRINTF_ATTRIBUTE(string_index, first_to_check)
-#define ABSL_SCANF_ATTRIBUTE(string_index, first_to_check)
-#endif
-
-// ABSL_ATTRIBUTE_ALWAYS_INLINE
-// ABSL_ATTRIBUTE_NOINLINE
-//
-// Forces functions to either inline or not inline. Introduced in gcc 3.1.
-#if ABSL_HAVE_ATTRIBUTE(always_inline) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_ALWAYS_INLINE __attribute__((always_inline))
-#define ABSL_HAVE_ATTRIBUTE_ALWAYS_INLINE 1
-#else
-#define ABSL_ATTRIBUTE_ALWAYS_INLINE
-#endif
-
-#if ABSL_HAVE_ATTRIBUTE(noinline) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_NOINLINE __attribute__((noinline))
-#define ABSL_HAVE_ATTRIBUTE_NOINLINE 1
-#else
-#define ABSL_ATTRIBUTE_NOINLINE
-#endif
-
-// ABSL_ATTRIBUTE_NO_TAIL_CALL
-//
-// Prevents the compiler from optimizing away stack frames for functions which
-// end in a call to another function.
-#if ABSL_HAVE_ATTRIBUTE(disable_tail_calls)
-#define ABSL_HAVE_ATTRIBUTE_NO_TAIL_CALL 1
-#define ABSL_ATTRIBUTE_NO_TAIL_CALL __attribute__((disable_tail_calls))
-#elif defined(__GNUC__) && !defined(__clang__)
-#define ABSL_HAVE_ATTRIBUTE_NO_TAIL_CALL 1
-#define ABSL_ATTRIBUTE_NO_TAIL_CALL \
-  __attribute__((optimize("no-optimize-sibling-calls")))
-#else
-#define ABSL_ATTRIBUTE_NO_TAIL_CALL
-#define ABSL_HAVE_ATTRIBUTE_NO_TAIL_CALL 0
-#endif
-
-// ABSL_ATTRIBUTE_WEAK
-//
-// Tags a function as weak for the purposes of compilation and linking.
-// Weak attributes currently do not work properly in LLVM's Windows backend,
-// so disable them there. See https://bugs.llvm.org/show_bug.cgi?id=37598
-// for further information.
-// The MinGW compiler doesn't complain about the weak attribute until the link
-// step, presumably because Windows doesn't use ELF binaries.
-#if (ABSL_HAVE_ATTRIBUTE(weak) ||                   \
-     (defined(__GNUC__) && !defined(__clang__))) && \
-    !(defined(__llvm__) && defined(_WIN32)) && !defined(__MINGW32__)
-#undef ABSL_ATTRIBUTE_WEAK
-#define ABSL_ATTRIBUTE_WEAK __attribute__((weak))
-#define ABSL_HAVE_ATTRIBUTE_WEAK 1
-#else
-#define ABSL_ATTRIBUTE_WEAK
-#define ABSL_HAVE_ATTRIBUTE_WEAK 0
-#endif
-
-// ABSL_ATTRIBUTE_NONNULL
-//
-// Tells the compiler either (a) that a particular function parameter
-// should be a non-null pointer, or (b) that all pointer arguments should
-// be non-null.
-//
-// Note: As the GCC manual states, "[s]ince non-static C++ methods
-// have an implicit 'this' argument, the arguments of such methods
-// should be counted from two, not one."
-//
-// Args are indexed starting at 1.
-//
-// For non-static class member functions, the implicit `this` argument
-// is arg 1, and the first explicit argument is arg 2. For static class member
-// functions, there is no implicit `this`, and the first explicit argument is
-// arg 1.
-//
-// Example:
-//
-//   /* arg_a cannot be null, but arg_b can */
-//   void Function(void* arg_a, void* arg_b) ABSL_ATTRIBUTE_NONNULL(1);
-//
-//   class C {
-//     /* arg_a cannot be null, but arg_b can */
-//     void Method(void* arg_a, void* arg_b) ABSL_ATTRIBUTE_NONNULL(2);
-//
-//     /* arg_a cannot be null, but arg_b can */
-//     static void StaticMethod(void* arg_a, void* arg_b)
-//     ABSL_ATTRIBUTE_NONNULL(1);
-//   };
-//
-// If no arguments are provided, then all pointer arguments should be non-null.
-//
-//  /* No pointer arguments may be null. */
-//  void Function(void* arg_a, void* arg_b, int arg_c) ABSL_ATTRIBUTE_NONNULL();
-//
-// NOTE: The GCC nonnull attribute actually accepts a list of arguments, but
-// ABSL_ATTRIBUTE_NONNULL does not.
-#if ABSL_HAVE_ATTRIBUTE(nonnull) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_NONNULL(arg_index) __attribute__((nonnull(arg_index)))
-#else
-#define ABSL_ATTRIBUTE_NONNULL(...)
-#endif
-
-// ABSL_ATTRIBUTE_NORETURN
-//
-// Tells the compiler that a given function never returns.
-#if ABSL_HAVE_ATTRIBUTE(noreturn) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_NORETURN __attribute__((noreturn))
-#elif defined(_MSC_VER)
-#define ABSL_ATTRIBUTE_NORETURN __declspec(noreturn)
-#else
-#define ABSL_ATTRIBUTE_NORETURN
-#endif
-
-// ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS
-//
-// Tells the AddressSanitizer (or other memory testing tools) to ignore a given
-// function. Useful for cases when a function reads random locations on stack,
-// calls _exit from a cloned subprocess, deliberately accesses buffer
-// out of bounds or does other scary things with memory.
-// NOTE: GCC supports AddressSanitizer(asan) since 4.8.
-// https://gcc.gnu.org/gcc-4.8/changes.html
-#if ABSL_HAVE_ATTRIBUTE(no_sanitize_address)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
-#else
-#define ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS
-#endif
-
-// ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY
-//
-// Tells the MemorySanitizer to relax the handling of a given function. All "Use
-// of uninitialized value" warnings from such functions will be suppressed, and
-// all values loaded from memory will be considered fully initialized.  This
-// attribute is similar to the ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS attribute
-// above, but deals with initialized-ness rather than addressability issues.
-// NOTE: MemorySanitizer(msan) is supported by Clang but not GCC.
-#if ABSL_HAVE_ATTRIBUTE(no_sanitize_memory)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY __attribute__((no_sanitize_memory))
-#else
-#define ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY
-#endif
-
-// ABSL_ATTRIBUTE_NO_SANITIZE_THREAD
-//
-// Tells the ThreadSanitizer to not instrument a given function.
-// NOTE: GCC supports ThreadSanitizer(tsan) since 4.8.
-// https://gcc.gnu.org/gcc-4.8/changes.html
-#if ABSL_HAVE_ATTRIBUTE(no_sanitize_thread)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_THREAD __attribute__((no_sanitize_thread))
-#else
-#define ABSL_ATTRIBUTE_NO_SANITIZE_THREAD
-#endif
-
-// ABSL_ATTRIBUTE_NO_SANITIZE_UNDEFINED
-//
-// Tells the UndefinedSanitizer to ignore a given function. Useful for cases
-// where certain behavior (eg. division by zero) is being used intentionally.
-// NOTE: GCC supports UndefinedBehaviorSanitizer(ubsan) since 4.9.
-// https://gcc.gnu.org/gcc-4.9/changes.html
-#if ABSL_HAVE_ATTRIBUTE(no_sanitize_undefined)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_UNDEFINED \
-  __attribute__((no_sanitize_undefined))
-#elif ABSL_HAVE_ATTRIBUTE(no_sanitize)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_UNDEFINED \
-  __attribute__((no_sanitize("undefined")))
-#else
-#define ABSL_ATTRIBUTE_NO_SANITIZE_UNDEFINED
-#endif
-
-// ABSL_ATTRIBUTE_NO_SANITIZE_CFI
-//
-// Tells the ControlFlowIntegrity sanitizer to not instrument a given function.
-// See https://clang.llvm.org/docs/ControlFlowIntegrity.html for details.
-#if ABSL_HAVE_ATTRIBUTE(no_sanitize)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_CFI __attribute__((no_sanitize("cfi")))
-#else
-#define ABSL_ATTRIBUTE_NO_SANITIZE_CFI
-#endif
-
-// ABSL_ATTRIBUTE_NO_SANITIZE_SAFESTACK
-//
-// Tells the SafeStack to not instrument a given function.
-// See https://clang.llvm.org/docs/SafeStack.html for details.
-#if ABSL_HAVE_ATTRIBUTE(no_sanitize)
-#define ABSL_ATTRIBUTE_NO_SANITIZE_SAFESTACK \
-  __attribute__((no_sanitize("safe-stack")))
-#else
-#define ABSL_ATTRIBUTE_NO_SANITIZE_SAFESTACK
-#endif
-
-// ABSL_ATTRIBUTE_RETURNS_NONNULL
-//
-// Tells the compiler that a particular function never returns a null pointer.
-#if ABSL_HAVE_ATTRIBUTE(returns_nonnull) || \
-    (defined(__GNUC__) && \
-     (__GNUC__ > 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)) && \
-     !defined(__clang__))
-#define ABSL_ATTRIBUTE_RETURNS_NONNULL __attribute__((returns_nonnull))
-#else
-#define ABSL_ATTRIBUTE_RETURNS_NONNULL
-#endif
-
-// ABSL_HAVE_ATTRIBUTE_SECTION
-//
-// Indicates whether labeled sections are supported. Weak symbol support is
-// a prerequisite. Labeled sections are not supported on Darwin/iOS.
-#ifdef ABSL_HAVE_ATTRIBUTE_SECTION
-#error ABSL_HAVE_ATTRIBUTE_SECTION cannot be directly set
-#elif (ABSL_HAVE_ATTRIBUTE(section) ||                \
-       (defined(__GNUC__) && !defined(__clang__))) && \
-    !defined(__APPLE__) && ABSL_HAVE_ATTRIBUTE_WEAK
-#define ABSL_HAVE_ATTRIBUTE_SECTION 1
-
-// ABSL_ATTRIBUTE_SECTION
-//
-// Tells the compiler/linker to put a given function into a section and define
-// `__start_ ## name` and `__stop_ ## name` symbols to bracket the section.
-// This functionality is supported by GNU linker.  Any function annotated with
-// `ABSL_ATTRIBUTE_SECTION` must not be inlined, or it will be placed into
-// whatever section its caller is placed into.
-//
-#ifndef ABSL_ATTRIBUTE_SECTION
-#define ABSL_ATTRIBUTE_SECTION(name) \
-  __attribute__((section(#name))) __attribute__((noinline))
-#endif
-
-
-// ABSL_ATTRIBUTE_SECTION_VARIABLE
-//
-// Tells the compiler/linker to put a given variable into a section and define
-// `__start_ ## name` and `__stop_ ## name` symbols to bracket the section.
-// This functionality is supported by GNU linker.
-#ifndef ABSL_ATTRIBUTE_SECTION_VARIABLE
-#define ABSL_ATTRIBUTE_SECTION_VARIABLE(name) __attribute__((section(#name)))
-#endif
-
-// ABSL_DECLARE_ATTRIBUTE_SECTION_VARS
-//
-// A weak section declaration to be used as a global declaration
-// for ABSL_ATTRIBUTE_SECTION_START|STOP(name) to compile and link
-// even without functions with ABSL_ATTRIBUTE_SECTION(name).
-// ABSL_DEFINE_ATTRIBUTE_SECTION should be in the exactly one file; it's
-// a no-op on ELF but not on Mach-O.
-//
-#ifndef ABSL_DECLARE_ATTRIBUTE_SECTION_VARS
-#define ABSL_DECLARE_ATTRIBUTE_SECTION_VARS(name) \
-  extern char __start_##name[] ABSL_ATTRIBUTE_WEAK;    \
-  extern char __stop_##name[] ABSL_ATTRIBUTE_WEAK
-#endif
-#ifndef ABSL_DEFINE_ATTRIBUTE_SECTION_VARS
-#define ABSL_INIT_ATTRIBUTE_SECTION_VARS(name)
-#define ABSL_DEFINE_ATTRIBUTE_SECTION_VARS(name)
-#endif
-
-// ABSL_ATTRIBUTE_SECTION_START
-//
-// Returns `void*` pointers to start/end of a section of code with
-// functions having ABSL_ATTRIBUTE_SECTION(name).
-// Returns 0 if no such functions exist.
-// One must ABSL_DECLARE_ATTRIBUTE_SECTION_VARS(name) for this to compile and
-// link.
-//
-#define ABSL_ATTRIBUTE_SECTION_START(name) \
-  (reinterpret_cast<void *>(__start_##name))
-#define ABSL_ATTRIBUTE_SECTION_STOP(name) \
-  (reinterpret_cast<void *>(__stop_##name))
-
-#else  // !ABSL_HAVE_ATTRIBUTE_SECTION
-
-#define ABSL_HAVE_ATTRIBUTE_SECTION 0
-
-// provide dummy definitions
-#define ABSL_ATTRIBUTE_SECTION(name)
-#define ABSL_ATTRIBUTE_SECTION_VARIABLE(name)
-#define ABSL_INIT_ATTRIBUTE_SECTION_VARS(name)
-#define ABSL_DEFINE_ATTRIBUTE_SECTION_VARS(name)
-#define ABSL_DECLARE_ATTRIBUTE_SECTION_VARS(name)
-#define ABSL_ATTRIBUTE_SECTION_START(name) (reinterpret_cast<void *>(0))
-#define ABSL_ATTRIBUTE_SECTION_STOP(name) (reinterpret_cast<void *>(0))
-
-#endif  // ABSL_ATTRIBUTE_SECTION
-
-// ABSL_ATTRIBUTE_STACK_ALIGN_FOR_OLD_LIBC
-//
-// Support for aligning the stack on 32-bit x86.
-#if ABSL_HAVE_ATTRIBUTE(force_align_arg_pointer) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#if defined(__i386__)
-#define ABSL_ATTRIBUTE_STACK_ALIGN_FOR_OLD_LIBC \
-  __attribute__((force_align_arg_pointer))
-#define ABSL_REQUIRE_STACK_ALIGN_TRAMPOLINE (0)
-#elif defined(__x86_64__)
-#define ABSL_REQUIRE_STACK_ALIGN_TRAMPOLINE (1)
-#define ABSL_ATTRIBUTE_STACK_ALIGN_FOR_OLD_LIBC
-#else  // !__i386__ && !__x86_64
-#define ABSL_REQUIRE_STACK_ALIGN_TRAMPOLINE (0)
-#define ABSL_ATTRIBUTE_STACK_ALIGN_FOR_OLD_LIBC
-#endif  // __i386__
-#else
-#define ABSL_ATTRIBUTE_STACK_ALIGN_FOR_OLD_LIBC
-#define ABSL_REQUIRE_STACK_ALIGN_TRAMPOLINE (0)
-#endif
-
-// ABSL_MUST_USE_RESULT
-//
-// Tells the compiler to warn about unused results.
-//
-// When annotating a function, it must appear as the first part of the
-// declaration or definition. The compiler will warn if the return value from
-// such a function is unused:
-//
-//   ABSL_MUST_USE_RESULT Sprocket* AllocateSprocket();
-//   AllocateSprocket();  // Triggers a warning.
-//
-// When annotating a class, it is equivalent to annotating every function which
-// returns an instance.
-//
-//   class ABSL_MUST_USE_RESULT Sprocket {};
-//   Sprocket();  // Triggers a warning.
-//
-//   Sprocket MakeSprocket();
-//   MakeSprocket();  // Triggers a warning.
-//
-// Note that references and pointers are not instances:
-//
-//   Sprocket* SprocketPointer();
-//   SprocketPointer();  // Does *not* trigger a warning.
-//
-// ABSL_MUST_USE_RESULT allows using cast-to-void to suppress the unused result
-// warning. For that, warn_unused_result is used only for clang but not for gcc.
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425
-//
-// Note: past advice was to place the macro after the argument list.
-#if ABSL_HAVE_ATTRIBUTE(nodiscard)
-#define ABSL_MUST_USE_RESULT [[nodiscard]]
-#elif defined(__clang__) && ABSL_HAVE_ATTRIBUTE(warn_unused_result)
-#define ABSL_MUST_USE_RESULT __attribute__((warn_unused_result))
-#else
-#define ABSL_MUST_USE_RESULT
-#endif
-
-// ABSL_ATTRIBUTE_HOT, ABSL_ATTRIBUTE_COLD
-//
-// Tells GCC that a function is hot or cold. GCC can use this information to
-// improve static analysis, i.e. a conditional branch to a cold function
-// is likely to be not-taken.
-// This annotation is used for function declarations.
-//
-// Example:
-//
-//   int foo() ABSL_ATTRIBUTE_HOT;
-#if ABSL_HAVE_ATTRIBUTE(hot) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_HOT __attribute__((hot))
-#else
-#define ABSL_ATTRIBUTE_HOT
-#endif
-
-#if ABSL_HAVE_ATTRIBUTE(cold) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_COLD __attribute__((cold))
-#else
-#define ABSL_ATTRIBUTE_COLD
-#endif
-
-// ABSL_XRAY_ALWAYS_INSTRUMENT, ABSL_XRAY_NEVER_INSTRUMENT, ABSL_XRAY_LOG_ARGS
-//
-// We define the ABSL_XRAY_ALWAYS_INSTRUMENT and ABSL_XRAY_NEVER_INSTRUMENT
-// macro used as an attribute to mark functions that must always or never be
-// instrumented by XRay. Currently, this is only supported in Clang/LLVM.
-//
-// For reference on the LLVM XRay instrumentation, see
-// http://llvm.org/docs/XRay.html.
-//
-// A function with the XRAY_ALWAYS_INSTRUMENT macro attribute in its declaration
-// will always get the XRay instrumentation sleds. These sleds may introduce
-// some binary size and runtime overhead and must be used sparingly.
-//
-// These attributes only take effect when the following conditions are met:
-//
-//   * The file/target is built in at least C++11 mode, with a Clang compiler
-//     that supports XRay attributes.
-//   * The file/target is built with the -fxray-instrument flag set for the
-//     Clang/LLVM compiler.
-//   * The function is defined in the translation unit (the compiler honors the
-//     attribute in either the definition or the declaration, and must match).
-//
-// There are cases when, even when building with XRay instrumentation, users
-// might want to control specifically which functions are instrumented for a
-// particular build using special-case lists provided to the compiler. These
-// special case lists are provided to Clang via the
-// -fxray-always-instrument=... and -fxray-never-instrument=... flags. The
-// attributes in source take precedence over these special-case lists.
-//
-// To disable the XRay attributes at build-time, users may define
-// ABSL_NO_XRAY_ATTRIBUTES. Do NOT define ABSL_NO_XRAY_ATTRIBUTES on specific
-// packages/targets, as this may lead to conflicting definitions of functions at
-// link-time.
-//
-// XRay isn't currently supported on Android:
-// https://github.com/android/ndk/issues/368
-#if ABSL_HAVE_CPP_ATTRIBUTE(clang::xray_always_instrument) && \
-    !defined(ABSL_NO_XRAY_ATTRIBUTES) && !defined(__ANDROID__)
-#define ABSL_XRAY_ALWAYS_INSTRUMENT [[clang::xray_always_instrument]]
-#define ABSL_XRAY_NEVER_INSTRUMENT [[clang::xray_never_instrument]]
-#if ABSL_HAVE_CPP_ATTRIBUTE(clang::xray_log_args)
-#define ABSL_XRAY_LOG_ARGS(N) \
-    [[clang::xray_always_instrument, clang::xray_log_args(N)]]
-#else
-#define ABSL_XRAY_LOG_ARGS(N) [[clang::xray_always_instrument]]
-#endif
-#else
-#define ABSL_XRAY_ALWAYS_INSTRUMENT
-#define ABSL_XRAY_NEVER_INSTRUMENT
-#define ABSL_XRAY_LOG_ARGS(N)
-#endif
-
-// ABSL_ATTRIBUTE_REINITIALIZES
-//
-// Indicates that a member function reinitializes the entire object to a known
-// state, independent of the previous state of the object.
-//
-// The clang-tidy check bugprone-use-after-move allows member functions marked
-// with this attribute to be called on objects that have been moved from;
-// without the attribute, this would result in a use-after-move warning.
-#if ABSL_HAVE_CPP_ATTRIBUTE(clang::reinitializes)
-#define ABSL_ATTRIBUTE_REINITIALIZES [[clang::reinitializes]]
-#else
-#define ABSL_ATTRIBUTE_REINITIALIZES
-#endif
-
-// -----------------------------------------------------------------------------
-// Variable Attributes
-// -----------------------------------------------------------------------------
-
-// ABSL_ATTRIBUTE_UNUSED
-//
-// Prevents the compiler from complaining about variables that appear unused.
-#if ABSL_HAVE_ATTRIBUTE(unused) || (defined(__GNUC__) && !defined(__clang__))
-#undef ABSL_ATTRIBUTE_UNUSED
-#define ABSL_ATTRIBUTE_UNUSED __attribute__((__unused__))
-#else
-#define ABSL_ATTRIBUTE_UNUSED
-#endif
-
-// ABSL_ATTRIBUTE_INITIAL_EXEC
-//
-// Tells the compiler to use "initial-exec" mode for a thread-local variable.
-// See http://people.redhat.com/drepper/tls.pdf for the gory details.
-#if ABSL_HAVE_ATTRIBUTE(tls_model) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_INITIAL_EXEC __attribute__((tls_model("initial-exec")))
-#else
-#define ABSL_ATTRIBUTE_INITIAL_EXEC
-#endif
-
-// ABSL_ATTRIBUTE_PACKED
-//
-// Instructs the compiler not to use natural alignment for a tagged data
-// structure, but instead to reduce its alignment to 1. This attribute can
-// either be applied to members of a structure or to a structure in its
-// entirety. Applying this attribute (judiciously) to a structure in its
-// entirety to optimize the memory footprint of very commonly-used structs is
-// fine. Do not apply this attribute to a structure in its entirety if the
-// purpose is to control the offsets of the members in the structure. Instead,
-// apply this attribute only to structure members that need it.
-//
-// When applying ABSL_ATTRIBUTE_PACKED only to specific structure members the
-// natural alignment of structure members not annotated is preserved. Aligned
-// member accesses are faster than non-aligned member accesses even if the
-// targeted microprocessor supports non-aligned accesses.
-#if ABSL_HAVE_ATTRIBUTE(packed) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_PACKED __attribute__((__packed__))
-#else
-#define ABSL_ATTRIBUTE_PACKED
-#endif
-
-// ABSL_ATTRIBUTE_FUNC_ALIGN
-//
-// Tells the compiler to align the function start at least to certain
-// alignment boundary
-#if ABSL_HAVE_ATTRIBUTE(aligned) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_ATTRIBUTE_FUNC_ALIGN(bytes) __attribute__((aligned(bytes)))
-#else
-#define ABSL_ATTRIBUTE_FUNC_ALIGN(bytes)
-#endif
-
-// ABSL_FALLTHROUGH_INTENDED
-//
-// Annotates implicit fall-through between switch labels, allowing a case to
-// indicate intentional fallthrough and turn off warnings about any lack of a
-// `break` statement. The ABSL_FALLTHROUGH_INTENDED macro should be followed by
-// a semicolon and can be used in most places where `break` can, provided that
-// no statements exist between it and the next switch label.
-//
-// Example:
-//
-//  switch (x) {
-//    case 40:
-//    case 41:
-//      if (truth_is_out_there) {
-//        ++x;
-//        ABSL_FALLTHROUGH_INTENDED;  // Use instead of/along with annotations
-//                                    // in comments
-//      } else {
-//        return x;
-//      }
-//    case 42:
-//      ...
-//
-// Notes: when compiled with clang in C++11 mode, the ABSL_FALLTHROUGH_INTENDED
-// macro is expanded to the [[clang::fallthrough]] attribute, which is analysed
-// when  performing switch labels fall-through diagnostic
-// (`-Wimplicit-fallthrough`). See clang documentation on language extensions
-// for details:
-// https://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough
-//
-// When used with unsupported compilers, the ABSL_FALLTHROUGH_INTENDED macro
-// has no effect on diagnostics. In any case this macro has no effect on runtime
-// behavior and performance of code.
-
-#ifdef ABSL_FALLTHROUGH_INTENDED
-#error "ABSL_FALLTHROUGH_INTENDED should not be defined."
-#endif
-
-// TODO(zhangxy): Use c++17 standard [[fallthrough]] macro, when supported.
-#if defined(__clang__) && defined(__has_warning)
-#if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
-#define ABSL_FALLTHROUGH_INTENDED [[clang::fallthrough]]
-#endif
-#elif defined(__GNUC__) && __GNUC__ >= 7
-#define ABSL_FALLTHROUGH_INTENDED [[gnu::fallthrough]]
-#endif
-
-#ifndef ABSL_FALLTHROUGH_INTENDED
-#define ABSL_FALLTHROUGH_INTENDED \
-  do {                            \
-  } while (0)
-#endif
-
-// ABSL_DEPRECATED()
-//
-// Marks a deprecated class, struct, enum, function, method and variable
-// declarations. The macro argument is used as a custom diagnostic message (e.g.
-// suggestion of a better alternative).
-//
-// Examples:
-//
-//   class ABSL_DEPRECATED("Use Bar instead") Foo {...};
-//
-//   ABSL_DEPRECATED("Use Baz() instead") void Bar() {...}
-//
-//   template <typename T>
-//   ABSL_DEPRECATED("Use DoThat() instead")
-//   void DoThis();
-//
-// Every usage of a deprecated entity will trigger a warning when compiled with
-// clang's `-Wdeprecated-declarations` option. This option is turned off by
-// default, but the warnings will be reported by clang-tidy.
-#if defined(__clang__) && defined(__cplusplus) && __cplusplus >= 201103L
-#define ABSL_DEPRECATED(message) __attribute__((deprecated(message)))
-#endif
-
-#ifndef ABSL_DEPRECATED
-#define ABSL_DEPRECATED(message)
-#endif
-
-// ABSL_CONST_INIT
-//
-// A variable declaration annotated with the `ABSL_CONST_INIT` attribute will
-// not compile (on supported platforms) unless the variable has a constant
-// initializer. This is useful for variables with static and thread storage
-// duration, because it guarantees that they will not suffer from the so-called
-// "static init order fiasco".  Prefer to put this attribute on the most visible
-// declaration of the variable, if there's more than one, because code that
-// accesses the variable can then use the attribute for optimization.
-//
-// Example:
-//
-//   class MyClass {
-//    public:
-//     ABSL_CONST_INIT static MyType my_var;
-//   };
-//
-//   MyType MyClass::my_var = MakeMyType(...);
-//
-// Note that this attribute is redundant if the variable is declared constexpr.
-#if ABSL_HAVE_CPP_ATTRIBUTE(clang::require_constant_initialization)
-#define ABSL_CONST_INIT [[clang::require_constant_initialization]]
-#else
-#define ABSL_CONST_INIT
-#endif  // ABSL_HAVE_CPP_ATTRIBUTE(clang::require_constant_initialization)
-
-#endif  // ABSL_BASE_ATTRIBUTES_H_
diff --git a/third_party/abseil/absl/base/bit_cast_test.cc b/third_party/abseil/absl/base/bit_cast_test.cc
deleted file mode 100644
index 8a3a41e..0000000
--- a/third_party/abseil/absl/base/bit_cast_test.cc
+++ /dev/null
@@ -1,109 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Unit test for bit_cast template.
-
-#include <cstdint>
-#include <cstring>
-
-#include "gtest/gtest.h"
-#include "absl/base/casts.h"
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-template <int N>
-struct marshall { char buf[N]; };
-
-template <typename T>
-void TestMarshall(const T values[], int num_values) {
-  for (int i = 0; i < num_values; ++i) {
-    T t0 = values[i];
-    marshall<sizeof(T)> m0 = absl::bit_cast<marshall<sizeof(T)> >(t0);
-    T t1 = absl::bit_cast<T>(m0);
-    marshall<sizeof(T)> m1 = absl::bit_cast<marshall<sizeof(T)> >(t1);
-    ASSERT_EQ(0, memcmp(&t0, &t1, sizeof(T)));
-    ASSERT_EQ(0, memcmp(&m0, &m1, sizeof(T)));
-  }
-}
-
-// Convert back and forth to an integral type.  The C++ standard does
-// not guarantee this will work, but we test that this works on all the
-// platforms we support.
-//
-// Likewise, we below make assumptions about sizeof(float) and
-// sizeof(double) which the standard does not guarantee, but which hold on the
-// platforms we support.
-
-template <typename T, typename I>
-void TestIntegral(const T values[], int num_values) {
-  for (int i = 0; i < num_values; ++i) {
-    T t0 = values[i];
-    I i0 = absl::bit_cast<I>(t0);
-    T t1 = absl::bit_cast<T>(i0);
-    I i1 = absl::bit_cast<I>(t1);
-    ASSERT_EQ(0, memcmp(&t0, &t1, sizeof(T)));
-    ASSERT_EQ(i0, i1);
-  }
-}
-
-TEST(BitCast, Bool) {
-  static const bool bool_list[] = { false, true };
-  TestMarshall<bool>(bool_list, ABSL_ARRAYSIZE(bool_list));
-}
-
-TEST(BitCast, Int32) {
-  static const int32_t int_list[] =
-    { 0, 1, 100, 2147483647, -1, -100, -2147483647, -2147483647-1 };
-  TestMarshall<int32_t>(int_list, ABSL_ARRAYSIZE(int_list));
-}
-
-TEST(BitCast, Int64) {
-  static const int64_t int64_list[] =
-    { 0, 1, 1LL << 40, -1, -(1LL<<40) };
-  TestMarshall<int64_t>(int64_list, ABSL_ARRAYSIZE(int64_list));
-}
-
-TEST(BitCast, Uint64) {
-  static const uint64_t uint64_list[] =
-    { 0, 1, 1LLU << 40, 1LLU << 63 };
-  TestMarshall<uint64_t>(uint64_list, ABSL_ARRAYSIZE(uint64_list));
-}
-
-TEST(BitCast, Float) {
-  static const float float_list[] =
-    { 0.0f, 1.0f, -1.0f, 10.0f, -10.0f,
-      1e10f, 1e20f, 1e-10f, 1e-20f,
-      2.71828f, 3.14159f };
-  TestMarshall<float>(float_list, ABSL_ARRAYSIZE(float_list));
-  TestIntegral<float, int>(float_list, ABSL_ARRAYSIZE(float_list));
-  TestIntegral<float, unsigned>(float_list, ABSL_ARRAYSIZE(float_list));
-}
-
-TEST(BitCast, Double) {
-  static const double double_list[] =
-    { 0.0, 1.0, -1.0, 10.0, -10.0,
-      1e10, 1e100, 1e-10, 1e-100,
-      2.718281828459045,
-      3.141592653589793238462643383279502884197169399375105820974944 };
-  TestMarshall<double>(double_list, ABSL_ARRAYSIZE(double_list));
-  TestIntegral<double, int64_t>(double_list, ABSL_ARRAYSIZE(double_list));
-  TestIntegral<double, uint64_t>(double_list, ABSL_ARRAYSIZE(double_list));
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/call_once.h b/third_party/abseil/absl/base/call_once.h
deleted file mode 100644
index 96109f5..0000000
--- a/third_party/abseil/absl/base/call_once.h
+++ /dev/null
@@ -1,219 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: call_once.h
-// -----------------------------------------------------------------------------
-//
-// This header file provides an Abseil version of `std::call_once` for invoking
-// a given function at most once, across all threads. This Abseil version is
-// faster than the C++11 version and incorporates the C++17 argument-passing
-// fix, so that (for example) non-const references may be passed to the invoked
-// function.
-
-#ifndef ABSL_BASE_CALL_ONCE_H_
-#define ABSL_BASE_CALL_ONCE_H_
-
-#include <algorithm>
-#include <atomic>
-#include <cstdint>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/invoke.h"
-#include "absl/base/internal/low_level_scheduling.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/internal/spinlock_wait.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class once_flag;
-
-namespace base_internal {
-std::atomic<uint32_t>* ControlWord(absl::once_flag* flag);
-}  // namespace base_internal
-
-// call_once()
-//
-// For all invocations using a given `once_flag`, invokes a given `fn` exactly
-// once across all threads. The first call to `call_once()` with a particular
-// `once_flag` argument (that does not throw an exception) will run the
-// specified function with the provided `args`; other calls with the same
-// `once_flag` argument will not run the function, but will wait
-// for the provided function to finish running (if it is still running).
-//
-// This mechanism provides a safe, simple, and fast mechanism for one-time
-// initialization in a multi-threaded process.
-//
-// Example:
-//
-// class MyInitClass {
-//  public:
-//  ...
-//  mutable absl::once_flag once_;
-//
-//  MyInitClass* init() const {
-//    absl::call_once(once_, &MyInitClass::Init, this);
-//    return ptr_;
-//  }
-//
-template <typename Callable, typename... Args>
-void call_once(absl::once_flag& flag, Callable&& fn, Args&&... args);
-
-// once_flag
-//
-// Objects of this type are used to distinguish calls to `call_once()` and
-// ensure the provided function is only invoked once across all threads. This
-// type is not copyable or movable. However, it has a `constexpr`
-// constructor, and is safe to use as a namespace-scoped global variable.
-class once_flag {
- public:
-  constexpr once_flag() : control_(0) {}
-  once_flag(const once_flag&) = delete;
-  once_flag& operator=(const once_flag&) = delete;
-
- private:
-  friend std::atomic<uint32_t>* base_internal::ControlWord(once_flag* flag);
-  std::atomic<uint32_t> control_;
-};
-
-//------------------------------------------------------------------------------
-// End of public interfaces.
-// Implementation details follow.
-//------------------------------------------------------------------------------
-
-namespace base_internal {
-
-// Like call_once, but uses KERNEL_ONLY scheduling. Intended to be used to
-// initialize entities used by the scheduler implementation.
-template <typename Callable, typename... Args>
-void LowLevelCallOnce(absl::once_flag* flag, Callable&& fn, Args&&... args);
-
-// Disables scheduling while on stack when scheduling mode is non-cooperative.
-// No effect for cooperative scheduling modes.
-class SchedulingHelper {
- public:
-  explicit SchedulingHelper(base_internal::SchedulingMode mode) : mode_(mode) {
-    if (mode_ == base_internal::SCHEDULE_KERNEL_ONLY) {
-      guard_result_ = base_internal::SchedulingGuard::DisableRescheduling();
-    }
-  }
-
-  ~SchedulingHelper() {
-    if (mode_ == base_internal::SCHEDULE_KERNEL_ONLY) {
-      base_internal::SchedulingGuard::EnableRescheduling(guard_result_);
-    }
-  }
-
- private:
-  base_internal::SchedulingMode mode_;
-  bool guard_result_;
-};
-
-// Bit patterns for call_once state machine values.  Internal implementation
-// detail, not for use by clients.
-//
-// The bit patterns are arbitrarily chosen from unlikely values, to aid in
-// debugging.  However, kOnceInit must be 0, so that a zero-initialized
-// once_flag will be valid for immediate use.
-enum {
-  kOnceInit = 0,
-  kOnceRunning = 0x65C2937B,
-  kOnceWaiter = 0x05A308D2,
-  // A very small constant is chosen for kOnceDone so that it fit in a single
-  // compare with immediate instruction for most common ISAs.  This is verified
-  // for x86, POWER and ARM.
-  kOnceDone = 221,    // Random Number
-};
-
-template <typename Callable, typename... Args>
-ABSL_ATTRIBUTE_NOINLINE
-void CallOnceImpl(std::atomic<uint32_t>* control,
-                  base_internal::SchedulingMode scheduling_mode, Callable&& fn,
-                  Args&&... args) {
-#ifndef NDEBUG
-  {
-    uint32_t old_control = control->load(std::memory_order_relaxed);
-    if (old_control != kOnceInit &&
-        old_control != kOnceRunning &&
-        old_control != kOnceWaiter &&
-        old_control != kOnceDone) {
-      ABSL_RAW_LOG(FATAL, "Unexpected value for control word: 0x%lx",
-                   static_cast<unsigned long>(old_control));  // NOLINT
-    }
-  }
-#endif  // NDEBUG
-  static const base_internal::SpinLockWaitTransition trans[] = {
-      {kOnceInit, kOnceRunning, true},
-      {kOnceRunning, kOnceWaiter, false},
-      {kOnceDone, kOnceDone, true}};
-
-  // Must do this before potentially modifying control word's state.
-  base_internal::SchedulingHelper maybe_disable_scheduling(scheduling_mode);
-  // Short circuit the simplest case to avoid procedure call overhead.
-  // The base_internal::SpinLockWait() call returns either kOnceInit or
-  // kOnceDone. If it returns kOnceDone, it must have loaded the control word
-  // with std::memory_order_acquire and seen a value of kOnceDone.
-  uint32_t old_control = kOnceInit;
-  if (control->compare_exchange_strong(old_control, kOnceRunning,
-                                       std::memory_order_relaxed) ||
-      base_internal::SpinLockWait(control, ABSL_ARRAYSIZE(trans), trans,
-                                  scheduling_mode) == kOnceInit) {
-    base_internal::invoke(std::forward<Callable>(fn),
-                          std::forward<Args>(args)...);
-    old_control =
-        control->exchange(base_internal::kOnceDone, std::memory_order_release);
-    if (old_control == base_internal::kOnceWaiter) {
-      base_internal::SpinLockWake(control, true);
-    }
-  }  // else *control is already kOnceDone
-}
-
-inline std::atomic<uint32_t>* ControlWord(once_flag* flag) {
-  return &flag->control_;
-}
-
-template <typename Callable, typename... Args>
-void LowLevelCallOnce(absl::once_flag* flag, Callable&& fn, Args&&... args) {
-  std::atomic<uint32_t>* once = base_internal::ControlWord(flag);
-  uint32_t s = once->load(std::memory_order_acquire);
-  if (ABSL_PREDICT_FALSE(s != base_internal::kOnceDone)) {
-    base_internal::CallOnceImpl(once, base_internal::SCHEDULE_KERNEL_ONLY,
-                                std::forward<Callable>(fn),
-                                std::forward<Args>(args)...);
-  }
-}
-
-}  // namespace base_internal
-
-template <typename Callable, typename... Args>
-void call_once(absl::once_flag& flag, Callable&& fn, Args&&... args) {
-  std::atomic<uint32_t>* once = base_internal::ControlWord(&flag);
-  uint32_t s = once->load(std::memory_order_acquire);
-  if (ABSL_PREDICT_FALSE(s != base_internal::kOnceDone)) {
-    base_internal::CallOnceImpl(
-        once, base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL,
-        std::forward<Callable>(fn), std::forward<Args>(args)...);
-  }
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_CALL_ONCE_H_
diff --git a/third_party/abseil/absl/base/call_once_test.cc b/third_party/abseil/absl/base/call_once_test.cc
deleted file mode 100644
index 11d26c4..0000000
--- a/third_party/abseil/absl/base/call_once_test.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/call_once.h"
-
-#include <thread>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/const_init.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-absl::once_flag once;
-
-ABSL_CONST_INIT Mutex counters_mu(absl::kConstInit);
-
-int running_thread_count ABSL_GUARDED_BY(counters_mu) = 0;
-int call_once_invoke_count ABSL_GUARDED_BY(counters_mu) = 0;
-int call_once_finished_count ABSL_GUARDED_BY(counters_mu) = 0;
-int call_once_return_count ABSL_GUARDED_BY(counters_mu) = 0;
-bool done_blocking ABSL_GUARDED_BY(counters_mu) = false;
-
-// Function to be called from absl::call_once.  Waits for a notification.
-void WaitAndIncrement() {
-  counters_mu.Lock();
-  ++call_once_invoke_count;
-  counters_mu.Unlock();
-
-  counters_mu.LockWhen(Condition(&done_blocking));
-  ++call_once_finished_count;
-  counters_mu.Unlock();
-}
-
-void ThreadBody() {
-  counters_mu.Lock();
-  ++running_thread_count;
-  counters_mu.Unlock();
-
-  absl::call_once(once, WaitAndIncrement);
-
-  counters_mu.Lock();
-  ++call_once_return_count;
-  counters_mu.Unlock();
-}
-
-// Returns true if all threads are set up for the test.
-bool ThreadsAreSetup(void*) ABSL_EXCLUSIVE_LOCKS_REQUIRED(counters_mu) {
-  // All ten threads must be running, and WaitAndIncrement should be blocked.
-  return running_thread_count == 10 && call_once_invoke_count == 1;
-}
-
-TEST(CallOnceTest, ExecutionCount) {
-  std::vector<std::thread> threads;
-
-  // Start 10 threads all calling call_once on the same once_flag.
-  for (int i = 0; i < 10; ++i) {
-    threads.emplace_back(ThreadBody);
-  }
-
-
-  // Wait until all ten threads have started, and WaitAndIncrement has been
-  // invoked.
-  counters_mu.LockWhen(Condition(ThreadsAreSetup, nullptr));
-
-  // WaitAndIncrement should have been invoked by exactly one call_once()
-  // instance.  That thread should be blocking on a notification, and all other
-  // call_once instances should be blocking as well.
-  EXPECT_EQ(call_once_invoke_count, 1);
-  EXPECT_EQ(call_once_finished_count, 0);
-  EXPECT_EQ(call_once_return_count, 0);
-
-  // Allow WaitAndIncrement to finish executing.  Once it does, the other
-  // call_once waiters will be unblocked.
-  done_blocking = true;
-  counters_mu.Unlock();
-
-  for (std::thread& thread : threads) {
-    thread.join();
-  }
-
-  counters_mu.Lock();
-  EXPECT_EQ(call_once_invoke_count, 1);
-  EXPECT_EQ(call_once_finished_count, 1);
-  EXPECT_EQ(call_once_return_count, 10);
-  counters_mu.Unlock();
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/casts.h b/third_party/abseil/absl/base/casts.h
deleted file mode 100644
index 83c6912..0000000
--- a/third_party/abseil/absl/base/casts.h
+++ /dev/null
@@ -1,187 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: casts.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines casting templates to fit use cases not covered by
-// the standard casts provided in the C++ standard. As with all cast operations,
-// use these with caution and only if alternatives do not exist.
-
-#ifndef ABSL_BASE_CASTS_H_
-#define ABSL_BASE_CASTS_H_
-
-#include <cstring>
-#include <memory>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/identity.h"
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace internal_casts {
-
-template <class Dest, class Source>
-struct is_bitcastable
-    : std::integral_constant<
-          bool,
-          sizeof(Dest) == sizeof(Source) &&
-              type_traits_internal::is_trivially_copyable<Source>::value &&
-              type_traits_internal::is_trivially_copyable<Dest>::value &&
-              std::is_default_constructible<Dest>::value> {};
-
-}  // namespace internal_casts
-
-// implicit_cast()
-//
-// Performs an implicit conversion between types following the language
-// rules for implicit conversion; if an implicit conversion is otherwise
-// allowed by the language in the given context, this function performs such an
-// implicit conversion.
-//
-// Example:
-//
-//   // If the context allows implicit conversion:
-//   From from;
-//   To to = from;
-//
-//   // Such code can be replaced by:
-//   implicit_cast<To>(from);
-//
-// An `implicit_cast()` may also be used to annotate numeric type conversions
-// that, although safe, may produce compiler warnings (such as `long` to `int`).
-// Additionally, an `implicit_cast()` is also useful within return statements to
-// indicate a specific implicit conversion is being undertaken.
-//
-// Example:
-//
-//   return implicit_cast<double>(size_in_bytes) / capacity_;
-//
-// Annotating code with `implicit_cast()` allows you to explicitly select
-// particular overloads and template instantiations, while providing a safer
-// cast than `reinterpret_cast()` or `static_cast()`.
-//
-// Additionally, an `implicit_cast()` can be used to allow upcasting within a
-// type hierarchy where incorrect use of `static_cast()` could accidentally
-// allow downcasting.
-//
-// Finally, an `implicit_cast()` can be used to perform implicit conversions
-// from unrelated types that otherwise couldn't be implicitly cast directly;
-// C++ will normally only implicitly cast "one step" in such conversions.
-//
-// That is, if C is a type which can be implicitly converted to B, with B being
-// a type that can be implicitly converted to A, an `implicit_cast()` can be
-// used to convert C to B (which the compiler can then implicitly convert to A
-// using language rules).
-//
-// Example:
-//
-//   // Assume an object C is convertible to B, which is implicitly convertible
-//   // to A
-//   A a = implicit_cast<B>(C);
-//
-// Such implicit cast chaining may be useful within template logic.
-template <typename To>
-constexpr To implicit_cast(typename absl::internal::identity_t<To> to) {
-  return to;
-}
-
-// bit_cast()
-//
-// Performs a bitwise cast on a type without changing the underlying bit
-// representation of that type's value. The two types must be of the same size
-// and both types must be trivially copyable. As with most casts, use with
-// caution. A `bit_cast()` might be needed when you need to temporarily treat a
-// type as some other type, such as in the following cases:
-//
-//    * Serialization (casting temporarily to `char *` for those purposes is
-//      always allowed by the C++ standard)
-//    * Managing the individual bits of a type within mathematical operations
-//      that are not normally accessible through that type
-//    * Casting non-pointer types to pointer types (casting the other way is
-//      allowed by `reinterpret_cast()` but round-trips cannot occur the other
-//      way).
-//
-// Example:
-//
-//   float f = 3.14159265358979;
-//   int i = bit_cast<int32_t>(f);
-//   // i = 0x40490fdb
-//
-// Casting non-pointer types to pointer types and then dereferencing them
-// traditionally produces undefined behavior.
-//
-// Example:
-//
-//   // WRONG
-//   float f = 3.14159265358979;            // WRONG
-//   int i = * reinterpret_cast<int*>(&f);  // WRONG
-//
-// The address-casting method produces undefined behavior according to the ISO
-// C++ specification section [basic.lval]. Roughly, this section says: if an
-// object in memory has one type, and a program accesses it with a different
-// type, the result is undefined behavior for most values of "different type".
-//
-// Such casting results in type punning: holding an object in memory of one type
-// and reading its bits back using a different type. A `bit_cast()` avoids this
-// issue by implementing its casts using `memcpy()`, which avoids introducing
-// this undefined behavior.
-//
-// NOTE: The requirements here are more strict than the bit_cast of standard
-// proposal p0476 due to the need for workarounds and lack of intrinsics.
-// Specifically, this implementation also requires `Dest` to be
-// default-constructible.
-template <
-    typename Dest, typename Source,
-    typename std::enable_if<internal_casts::is_bitcastable<Dest, Source>::value,
-                            int>::type = 0>
-inline Dest bit_cast(const Source& source) {
-  Dest dest;
-  memcpy(static_cast<void*>(std::addressof(dest)),
-         static_cast<const void*>(std::addressof(source)), sizeof(dest));
-  return dest;
-}
-
-// NOTE: This overload is only picked if the requirements of bit_cast are
-// not met. It is therefore UB, but is provided temporarily as previous
-// versions of this function template were unchecked. Do not use this in
-// new code.
-template <
-    typename Dest, typename Source,
-    typename std::enable_if<
-        !internal_casts::is_bitcastable<Dest, Source>::value,
-        int>::type = 0>
-ABSL_DEPRECATED(
-    "absl::bit_cast type requirements were violated. Update the types "
-    "being used such that they are the same size and are both "
-    "TriviallyCopyable.")
-inline Dest bit_cast(const Source& source) {
-  static_assert(sizeof(Dest) == sizeof(Source),
-                "Source and destination types should have equal sizes.");
-
-  Dest dest;
-  memcpy(&dest, &source, sizeof(dest));
-  return dest;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_CASTS_H_
diff --git a/third_party/abseil/absl/base/config.h b/third_party/abseil/absl/base/config.h
deleted file mode 100644
index 3f7f32b..0000000
--- a/third_party/abseil/absl/base/config.h
+++ /dev/null
@@ -1,714 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: config.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines a set of macros for checking the presence of
-// important compiler and platform features. Such macros can be used to
-// produce portable code by parameterizing compilation based on the presence or
-// lack of a given feature.
-//
-// We define a "feature" as some interface we wish to program to: for example,
-// a library function or system call. A value of `1` indicates support for
-// that feature; any other value indicates the feature support is undefined.
-//
-// Example:
-//
-// Suppose a programmer wants to write a program that uses the 'mmap()' system
-// call. The Abseil macro for that feature (`ABSL_HAVE_MMAP`) allows you to
-// selectively include the `mmap.h` header and bracket code using that feature
-// in the macro:
-//
-//   #include "absl/base/config.h"
-//
-//   #ifdef ABSL_HAVE_MMAP
-//   #include "sys/mman.h"
-//   #endif  //ABSL_HAVE_MMAP
-//
-//   ...
-//   #ifdef ABSL_HAVE_MMAP
-//   void *ptr = mmap(...);
-//   ...
-//   #endif  // ABSL_HAVE_MMAP
-
-#ifndef ABSL_BASE_CONFIG_H_
-#define ABSL_BASE_CONFIG_H_
-
-// Included for the __GLIBC__ macro (or similar macros on other systems).
-#include <limits.h>
-
-#ifdef __cplusplus
-// Included for __GLIBCXX__, _LIBCPP_VERSION
-#include <cstddef>
-#endif  // __cplusplus
-
-#if defined(__APPLE__)
-// Included for TARGET_OS_IPHONE, __IPHONE_OS_VERSION_MIN_REQUIRED,
-// __IPHONE_8_0.
-#include <Availability.h>
-#include <TargetConditionals.h>
-#endif
-
-#include "absl/base/options.h"
-#include "absl/base/policy_checks.h"
-
-// Helper macro to convert a CPP variable to a string literal.
-#define ABSL_INTERNAL_DO_TOKEN_STR(x) #x
-#define ABSL_INTERNAL_TOKEN_STR(x) ABSL_INTERNAL_DO_TOKEN_STR(x)
-
-// -----------------------------------------------------------------------------
-// Abseil namespace annotations
-// -----------------------------------------------------------------------------
-
-// ABSL_NAMESPACE_BEGIN/ABSL_NAMESPACE_END
-//
-// An annotation placed at the beginning/end of each `namespace absl` scope.
-// This is used to inject an inline namespace.
-//
-// The proper way to write Abseil code in the `absl` namespace is:
-//
-// namespace absl {
-// ABSL_NAMESPACE_BEGIN
-//
-// void Foo();  // absl::Foo().
-//
-// ABSL_NAMESPACE_END
-// }  // namespace absl
-//
-// Users of Abseil should not use these macros, because users of Abseil should
-// not write `namespace absl {` in their own code for any reason.  (Abseil does
-// not support forward declarations of its own types, nor does it support
-// user-provided specialization of Abseil templates.  Code that violates these
-// rules may be broken without warning.)
-#if !defined(ABSL_OPTION_USE_INLINE_NAMESPACE) || \
-    !defined(ABSL_OPTION_INLINE_NAMESPACE_NAME)
-#error options.h is misconfigured.
-#endif
-
-// Check that ABSL_OPTION_INLINE_NAMESPACE_NAME is neither "head" nor ""
-#if defined(__cplusplus) && ABSL_OPTION_USE_INLINE_NAMESPACE == 1
-
-#define ABSL_INTERNAL_INLINE_NAMESPACE_STR \
-  ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME)
-
-static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != '\0',
-              "options.h misconfigured: ABSL_OPTION_INLINE_NAMESPACE_NAME must "
-              "not be empty.");
-static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
-                  ABSL_INTERNAL_INLINE_NAMESPACE_STR[1] != 'e' ||
-                  ABSL_INTERNAL_INLINE_NAMESPACE_STR[2] != 'a' ||
-                  ABSL_INTERNAL_INLINE_NAMESPACE_STR[3] != 'd' ||
-                  ABSL_INTERNAL_INLINE_NAMESPACE_STR[4] != '\0',
-              "options.h misconfigured: ABSL_OPTION_INLINE_NAMESPACE_NAME must "
-              "be changed to a new, unique identifier name.");
-
-#endif
-
-#if ABSL_OPTION_USE_INLINE_NAMESPACE == 0
-#define ABSL_NAMESPACE_BEGIN
-#define ABSL_NAMESPACE_END
-#elif ABSL_OPTION_USE_INLINE_NAMESPACE == 1
-#define ABSL_NAMESPACE_BEGIN \
-  inline namespace ABSL_OPTION_INLINE_NAMESPACE_NAME {
-#define ABSL_NAMESPACE_END }
-#else
-#error options.h is misconfigured.
-#endif
-
-// -----------------------------------------------------------------------------
-// Compiler Feature Checks
-// -----------------------------------------------------------------------------
-
-// ABSL_HAVE_BUILTIN()
-//
-// Checks whether the compiler supports a Clang Feature Checking Macro, and if
-// so, checks whether it supports the provided builtin function "x" where x
-// is one of the functions noted in
-// https://clang.llvm.org/docs/LanguageExtensions.html
-//
-// Note: Use this macro to avoid an extra level of #ifdef __has_builtin check.
-// http://releases.llvm.org/3.3/tools/clang/docs/LanguageExtensions.html
-#ifdef __has_builtin
-#define ABSL_HAVE_BUILTIN(x) __has_builtin(x)
-#else
-#define ABSL_HAVE_BUILTIN(x) 0
-#endif
-
-#if defined(__is_identifier)
-#define ABSL_INTERNAL_HAS_KEYWORD(x) !(__is_identifier(x))
-#else
-#define ABSL_INTERNAL_HAS_KEYWORD(x) 0
-#endif
-
-#ifdef __has_feature
-#define ABSL_HAVE_FEATURE(f) __has_feature(f)
-#else
-#define ABSL_HAVE_FEATURE(f) 0
-#endif
-
-// ABSL_HAVE_TLS is defined to 1 when __thread should be supported.
-// We assume __thread is supported on Linux when compiled with Clang or compiled
-// against libstdc++ with _GLIBCXX_HAVE_TLS defined.
-#ifdef ABSL_HAVE_TLS
-#error ABSL_HAVE_TLS cannot be directly set
-#elif defined(__linux__) && (defined(__clang__) || defined(_GLIBCXX_HAVE_TLS))
-#define ABSL_HAVE_TLS 1
-#endif
-
-// ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
-//
-// Checks whether `std::is_trivially_destructible<T>` is supported.
-//
-// Notes: All supported compilers using libc++ support this feature, as does
-// gcc >= 4.8.1 using libstdc++, and Visual Studio.
-#ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
-#error ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE cannot be directly set
-#elif defined(_LIBCPP_VERSION) ||                                        \
-    (!defined(__clang__) && defined(__GNUC__) && defined(__GLIBCXX__) && \
-     (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) ||        \
-    defined(_MSC_VER)
-#define ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE 1
-#endif
-
-// ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE
-//
-// Checks whether `std::is_trivially_default_constructible<T>` and
-// `std::is_trivially_copy_constructible<T>` are supported.
-
-// ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
-//
-// Checks whether `std::is_trivially_copy_assignable<T>` is supported.
-
-// Notes: Clang with libc++ supports these features, as does gcc >= 5.1 with
-// either libc++ or libstdc++, and Visual Studio (but not NVCC).
-#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE)
-#error ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE cannot be directly set
-#elif defined(ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE)
-#error ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE cannot directly set
-#elif (defined(__clang__) && defined(_LIBCPP_VERSION)) ||        \
-    (!defined(__clang__) && defined(__GNUC__) &&                 \
-     (__GNUC__ > 7 || (__GNUC__ == 7 && __GNUC_MINOR__ >= 4)) && \
-     (defined(_LIBCPP_VERSION) || defined(__GLIBCXX__))) ||      \
-    (defined(_MSC_VER) && !defined(__NVCC__))
-#define ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE 1
-#define ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE 1
-#endif
-
-// ABSL_HAVE_SOURCE_LOCATION_CURRENT
-//
-// Indicates whether `absl::SourceLocation::current()` will return useful
-// information in some contexts.
-#ifndef ABSL_HAVE_SOURCE_LOCATION_CURRENT
-#if ABSL_INTERNAL_HAS_KEYWORD(__builtin_LINE) && \
-    ABSL_INTERNAL_HAS_KEYWORD(__builtin_FILE)
-#define ABSL_HAVE_SOURCE_LOCATION_CURRENT 1
-#endif
-#endif
-
-// ABSL_HAVE_THREAD_LOCAL
-//
-// Checks whether C++11's `thread_local` storage duration specifier is
-// supported.
-#ifdef ABSL_HAVE_THREAD_LOCAL
-#error ABSL_HAVE_THREAD_LOCAL cannot be directly set
-#elif defined(__APPLE__)
-// Notes:
-// * Xcode's clang did not support `thread_local` until version 8, and
-//   even then not for all iOS < 9.0.
-// * Xcode 9.3 started disallowing `thread_local` for 32-bit iOS simulator
-//   targeting iOS 9.x.
-// * Xcode 10 moves the deployment target check for iOS < 9.0 to link time
-//   making ABSL_HAVE_FEATURE unreliable there.
-//
-#if ABSL_HAVE_FEATURE(cxx_thread_local) && \
-    !(TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_9_0)
-#define ABSL_HAVE_THREAD_LOCAL 1
-#endif
-#else  // !defined(__APPLE__)
-#define ABSL_HAVE_THREAD_LOCAL 1
-#endif
-
-// There are platforms for which TLS should not be used even though the compiler
-// makes it seem like it's supported (Android NDK < r12b for example).
-// This is primarily because of linker problems and toolchain misconfiguration:
-// Abseil does not intend to support this indefinitely. Currently, the newest
-// toolchain that we intend to support that requires this behavior is the
-// r11 NDK - allowing for a 5 year support window on that means this option
-// is likely to be removed around June of 2021.
-// TLS isn't supported until NDK r12b per
-// https://developer.android.com/ndk/downloads/revision_history.html
-// Since NDK r16, `__NDK_MAJOR__` and `__NDK_MINOR__` are defined in
-// <android/ndk-version.h>. For NDK < r16, users should define these macros,
-// e.g. `-D__NDK_MAJOR__=11 -D__NKD_MINOR__=0` for NDK r11.
-#if defined(__ANDROID__) && defined(__clang__)
-#if __has_include(<android/ndk-version.h>)
-#include <android/ndk-version.h>
-#endif  // __has_include(<android/ndk-version.h>)
-#if defined(__ANDROID__) && defined(__clang__) && defined(__NDK_MAJOR__) && \
-    defined(__NDK_MINOR__) &&                                               \
-    ((__NDK_MAJOR__ < 12) || ((__NDK_MAJOR__ == 12) && (__NDK_MINOR__ < 1)))
-#undef ABSL_HAVE_TLS
-#undef ABSL_HAVE_THREAD_LOCAL
-#endif
-#endif  // defined(__ANDROID__) && defined(__clang__)
-
-// ABSL_HAVE_INTRINSIC_INT128
-//
-// Checks whether the __int128 compiler extension for a 128-bit integral type is
-// supported.
-//
-// Note: __SIZEOF_INT128__ is defined by Clang and GCC when __int128 is
-// supported, but we avoid using it in certain cases:
-// * On Clang:
-//   * Building using Clang for Windows, where the Clang runtime library has
-//     128-bit support only on LP64 architectures, but Windows is LLP64.
-// * On Nvidia's nvcc:
-//   * nvcc also defines __GNUC__ and __SIZEOF_INT128__, but not all versions
-//     actually support __int128.
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-#error ABSL_HAVE_INTRINSIC_INT128 cannot be directly set
-#elif defined(__SIZEOF_INT128__)
-#if (defined(__clang__) && !defined(_WIN32)) || \
-    (defined(__CUDACC__) && __CUDACC_VER_MAJOR__ >= 9) ||                \
-    (defined(__GNUC__) && !defined(__clang__) && !defined(__CUDACC__))
-#define ABSL_HAVE_INTRINSIC_INT128 1
-#elif defined(__CUDACC__)
-// __CUDACC_VER__ is a full version number before CUDA 9, and is defined to a
-// string explaining that it has been removed starting with CUDA 9. We use
-// nested #ifs because there is no short-circuiting in the preprocessor.
-// NOTE: `__CUDACC__` could be undefined while `__CUDACC_VER__` is defined.
-#if __CUDACC_VER__ >= 70000
-#define ABSL_HAVE_INTRINSIC_INT128 1
-#endif  // __CUDACC_VER__ >= 70000
-#endif  // defined(__CUDACC__)
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-// ABSL_HAVE_EXCEPTIONS
-//
-// Checks whether the compiler both supports and enables exceptions. Many
-// compilers support a "no exceptions" mode that disables exceptions.
-//
-// Generally, when ABSL_HAVE_EXCEPTIONS is not defined:
-//
-// * Code using `throw` and `try` may not compile.
-// * The `noexcept` specifier will still compile and behave as normal.
-// * The `noexcept` operator may still return `false`.
-//
-// For further details, consult the compiler's documentation.
-#ifdef ABSL_HAVE_EXCEPTIONS
-#error ABSL_HAVE_EXCEPTIONS cannot be directly set.
-
-#elif defined(__clang__)
-
-#if __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 6)
-// Clang >= 3.6
-#if ABSL_HAVE_FEATURE(cxx_exceptions)
-#define ABSL_HAVE_EXCEPTIONS 1
-#endif  // ABSL_HAVE_FEATURE(cxx_exceptions)
-#else
-// Clang < 3.6
-// http://releases.llvm.org/3.6.0/tools/clang/docs/ReleaseNotes.html#the-exceptions-macro
-#if defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions)
-#define ABSL_HAVE_EXCEPTIONS 1
-#endif  // defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions)
-#endif  // __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 6)
-
-// Handle remaining special cases and default to exceptions being supported.
-#elif !(defined(__GNUC__) && (__GNUC__ < 5) && !defined(__EXCEPTIONS)) &&    \
-    !(defined(__GNUC__) && (__GNUC__ >= 5) && !defined(__cpp_exceptions)) && \
-    !(defined(_MSC_VER) && !defined(_CPPUNWIND))
-#define ABSL_HAVE_EXCEPTIONS 1
-#endif
-
-// -----------------------------------------------------------------------------
-// Platform Feature Checks
-// -----------------------------------------------------------------------------
-
-// Currently supported operating systems and associated preprocessor
-// symbols:
-//
-//   Linux and Linux-derived           __linux__
-//   Android                           __ANDROID__ (implies __linux__)
-//   Linux (non-Android)               __linux__ && !__ANDROID__
-//   Darwin (macOS and iOS)            __APPLE__
-//   Akaros (http://akaros.org)        __ros__
-//   Windows                           _WIN32
-//   NaCL                              __native_client__
-//   AsmJS                             __asmjs__
-//   WebAssembly                       __wasm__
-//   Fuchsia                           __Fuchsia__
-//
-// Note that since Android defines both __ANDROID__ and __linux__, one
-// may probe for either Linux or Android by simply testing for __linux__.
-
-// ABSL_HAVE_MMAP
-//
-// Checks whether the platform has an mmap(2) implementation as defined in
-// POSIX.1-2001.
-#ifdef ABSL_HAVE_MMAP
-#error ABSL_HAVE_MMAP cannot be directly set
-#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) ||   \
-    defined(__ros__) || defined(__native_client__) || defined(__asmjs__) || \
-    defined(__wasm__) || defined(__Fuchsia__) || defined(__sun) || \
-    defined(__ASYLO__) || defined(__myriad2__)
-#define ABSL_HAVE_MMAP 1
-#endif
-
-// ABSL_HAVE_PTHREAD_GETSCHEDPARAM
-//
-// Checks whether the platform implements the pthread_(get|set)schedparam(3)
-// functions as defined in POSIX.1-2001.
-#ifdef ABSL_HAVE_PTHREAD_GETSCHEDPARAM
-#error ABSL_HAVE_PTHREAD_GETSCHEDPARAM cannot be directly set
-#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
-    defined(__ros__)
-#define ABSL_HAVE_PTHREAD_GETSCHEDPARAM 1
-#endif
-
-// ABSL_HAVE_SCHED_YIELD
-//
-// Checks whether the platform implements sched_yield(2) as defined in
-// POSIX.1-2001.
-#ifdef ABSL_HAVE_SCHED_YIELD
-#error ABSL_HAVE_SCHED_YIELD cannot be directly set
-#elif defined(__linux__) || defined(__ros__) || defined(__native_client__)
-#define ABSL_HAVE_SCHED_YIELD 1
-#endif
-
-// ABSL_HAVE_SEMAPHORE_H
-//
-// Checks whether the platform supports the <semaphore.h> header and sem_init(3)
-// family of functions as standardized in POSIX.1-2001.
-//
-// Note: While Apple provides <semaphore.h> for both iOS and macOS, it is
-// explicitly deprecated and will cause build failures if enabled for those
-// platforms.  We side-step the issue by not defining it here for Apple
-// platforms.
-#ifdef ABSL_HAVE_SEMAPHORE_H
-#error ABSL_HAVE_SEMAPHORE_H cannot be directly set
-#elif defined(__linux__) || defined(__ros__)
-#define ABSL_HAVE_SEMAPHORE_H 1
-#endif
-
-// ABSL_HAVE_ALARM
-//
-// Checks whether the platform supports the <signal.h> header and alarm(2)
-// function as standardized in POSIX.1-2001.
-#ifdef ABSL_HAVE_ALARM
-#error ABSL_HAVE_ALARM cannot be directly set
-#elif defined(__GOOGLE_GRTE_VERSION__)
-// feature tests for Google's GRTE
-#define ABSL_HAVE_ALARM 1
-#elif defined(__GLIBC__)
-// feature test for glibc
-#define ABSL_HAVE_ALARM 1
-#elif defined(_MSC_VER)
-// feature tests for Microsoft's library
-#elif defined(__MINGW32__)
-// mingw32 doesn't provide alarm(2):
-// https://osdn.net/projects/mingw/scm/git/mingw-org-wsl/blobs/5.2-trunk/mingwrt/include/unistd.h
-// mingw-w64 provides a no-op implementation:
-// https://sourceforge.net/p/mingw-w64/mingw-w64/ci/master/tree/mingw-w64-crt/misc/alarm.c
-#elif defined(__EMSCRIPTEN__)
-// emscripten doesn't support signals
-#elif defined(__Fuchsia__)
-// Signals don't exist on fuchsia.
-#elif defined(__native_client__)
-#else
-// other standard libraries
-#define ABSL_HAVE_ALARM 1
-#endif
-
-// ABSL_IS_LITTLE_ENDIAN
-// ABSL_IS_BIG_ENDIAN
-//
-// Checks the endianness of the platform.
-//
-// Notes: uses the built in endian macros provided by GCC (since 4.6) and
-// Clang (since 3.2); see
-// https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html.
-// Otherwise, if _WIN32, assume little endian. Otherwise, bail with an error.
-#if defined(ABSL_IS_BIG_ENDIAN)
-#error "ABSL_IS_BIG_ENDIAN cannot be directly set."
-#endif
-#if defined(ABSL_IS_LITTLE_ENDIAN)
-#error "ABSL_IS_LITTLE_ENDIAN cannot be directly set."
-#endif
-
-#if (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
-     __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
-#define ABSL_IS_LITTLE_ENDIAN 1
-#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
-    __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#define ABSL_IS_BIG_ENDIAN 1
-#elif defined(_WIN32)
-#define ABSL_IS_LITTLE_ENDIAN 1
-#else
-#error "absl endian detection needs to be set up for your compiler"
-#endif
-
-// macOS 10.13 and iOS 10.11 don't let you use <any>, <optional>, or <variant>
-// even though the headers exist and are publicly noted to work.  See
-// https://github.com/abseil/abseil-cpp/issues/207 and
-// https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes
-// libc++ spells out the availability requirements in the file
-// llvm-project/libcxx/include/__config via the #define
-// _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS.
-#if defined(__APPLE__) && defined(_LIBCPP_VERSION) && \
-  ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101400) || \
-  (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 120000) || \
-  (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000) || \
-  (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && \
-   __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 120000))
-#define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1
-#else
-#define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0
-#endif
-
-// ABSL_HAVE_STD_ANY
-//
-// Checks whether C++17 std::any is available by checking whether <any> exists.
-#ifdef ABSL_HAVE_STD_ANY
-#error "ABSL_HAVE_STD_ANY cannot be directly set."
-#endif
-
-#ifdef __has_include
-#if __has_include(<any>) && __cplusplus >= 201703L && \
-    !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
-#define ABSL_HAVE_STD_ANY 1
-#endif
-#endif
-
-// ABSL_HAVE_STD_OPTIONAL
-//
-// Checks whether C++17 std::optional is available.
-#ifdef ABSL_HAVE_STD_OPTIONAL
-#error "ABSL_HAVE_STD_OPTIONAL cannot be directly set."
-#endif
-
-#ifdef __has_include
-#if __has_include(<optional>) && __cplusplus >= 201703L && \
-    !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
-#define ABSL_HAVE_STD_OPTIONAL 1
-#endif
-#endif
-
-// ABSL_HAVE_STD_VARIANT
-//
-// Checks whether C++17 std::variant is available.
-#ifdef ABSL_HAVE_STD_VARIANT
-#error "ABSL_HAVE_STD_VARIANT cannot be directly set."
-#endif
-
-#ifdef __has_include
-#if __has_include(<variant>) && __cplusplus >= 201703L && \
-    !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
-#define ABSL_HAVE_STD_VARIANT 1
-#endif
-#endif
-
-// ABSL_HAVE_STD_STRING_VIEW
-//
-// Checks whether C++17 std::string_view is available.
-#ifdef ABSL_HAVE_STD_STRING_VIEW
-#error "ABSL_HAVE_STD_STRING_VIEW cannot be directly set."
-#endif
-
-#ifdef __has_include
-#if __has_include(<string_view>) && __cplusplus >= 201703L
-#define ABSL_HAVE_STD_STRING_VIEW 1
-#endif
-#endif
-
-// For MSVC, `__has_include` is supported in VS 2017 15.3, which is later than
-// the support for <optional>, <any>, <string_view>, <variant>. So we use
-// _MSC_VER to check whether we have VS 2017 RTM (when <optional>, <any>,
-// <string_view>, <variant> is implemented) or higher. Also, `__cplusplus` is
-// not correctly set by MSVC, so we use `_MSVC_LANG` to check the language
-// version.
-// TODO(zhangxy): fix tests before enabling aliasing for `std::any`.
-#if defined(_MSC_VER) && _MSC_VER >= 1910 && \
-    ((defined(_MSVC_LANG) && _MSVC_LANG > 201402) || __cplusplus > 201402)
-// #define ABSL_HAVE_STD_ANY 1
-#define ABSL_HAVE_STD_OPTIONAL 1
-#define ABSL_HAVE_STD_VARIANT 1
-#define ABSL_HAVE_STD_STRING_VIEW 1
-#endif
-
-// ABSL_USES_STD_ANY
-//
-// Indicates whether absl::any is an alias for std::any.
-#if !defined(ABSL_OPTION_USE_STD_ANY)
-#error options.h is misconfigured.
-#elif ABSL_OPTION_USE_STD_ANY == 0 || \
-    (ABSL_OPTION_USE_STD_ANY == 2 && !defined(ABSL_HAVE_STD_ANY))
-#undef ABSL_USES_STD_ANY
-#elif ABSL_OPTION_USE_STD_ANY == 1 || \
-    (ABSL_OPTION_USE_STD_ANY == 2 && defined(ABSL_HAVE_STD_ANY))
-#define ABSL_USES_STD_ANY 1
-#else
-#error options.h is misconfigured.
-#endif
-
-// ABSL_USES_STD_OPTIONAL
-//
-// Indicates whether absl::optional is an alias for std::optional.
-#if !defined(ABSL_OPTION_USE_STD_OPTIONAL)
-#error options.h is misconfigured.
-#elif ABSL_OPTION_USE_STD_OPTIONAL == 0 || \
-    (ABSL_OPTION_USE_STD_OPTIONAL == 2 && !defined(ABSL_HAVE_STD_OPTIONAL))
-#undef ABSL_USES_STD_OPTIONAL
-#elif ABSL_OPTION_USE_STD_OPTIONAL == 1 || \
-    (ABSL_OPTION_USE_STD_OPTIONAL == 2 && defined(ABSL_HAVE_STD_OPTIONAL))
-#define ABSL_USES_STD_OPTIONAL 1
-#else
-#error options.h is misconfigured.
-#endif
-
-// ABSL_USES_STD_VARIANT
-//
-// Indicates whether absl::variant is an alias for std::variant.
-#if !defined(ABSL_OPTION_USE_STD_VARIANT)
-#error options.h is misconfigured.
-#elif ABSL_OPTION_USE_STD_VARIANT == 0 || \
-    (ABSL_OPTION_USE_STD_VARIANT == 2 && !defined(ABSL_HAVE_STD_VARIANT))
-#undef ABSL_USES_STD_VARIANT
-#elif ABSL_OPTION_USE_STD_VARIANT == 1 || \
-    (ABSL_OPTION_USE_STD_VARIANT == 2 && defined(ABSL_HAVE_STD_VARIANT))
-#define ABSL_USES_STD_VARIANT 1
-#else
-#error options.h is misconfigured.
-#endif
-
-// ABSL_USES_STD_STRING_VIEW
-//
-// Indicates whether absl::string_view is an alias for std::string_view.
-#if !defined(ABSL_OPTION_USE_STD_STRING_VIEW)
-#error options.h is misconfigured.
-#elif ABSL_OPTION_USE_STD_STRING_VIEW == 0 || \
-    (ABSL_OPTION_USE_STD_STRING_VIEW == 2 &&  \
-     !defined(ABSL_HAVE_STD_STRING_VIEW))
-#undef ABSL_USES_STD_STRING_VIEW
-#elif ABSL_OPTION_USE_STD_STRING_VIEW == 1 || \
-    (ABSL_OPTION_USE_STD_STRING_VIEW == 2 &&  \
-     defined(ABSL_HAVE_STD_STRING_VIEW))
-#define ABSL_USES_STD_STRING_VIEW 1
-#else
-#error options.h is misconfigured.
-#endif
-
-// In debug mode, MSVC 2017's std::variant throws a EXCEPTION_ACCESS_VIOLATION
-// SEH exception from emplace for variant<SomeStruct> when constructing the
-// struct can throw. This defeats some of variant_test and
-// variant_exception_safety_test.
-#if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_DEBUG)
-#define ABSL_INTERNAL_MSVC_2017_DBG_MODE
-#endif
-
-// ABSL_INTERNAL_MANGLED_NS
-// ABSL_INTERNAL_MANGLED_BACKREFERENCE
-//
-// Internal macros for building up mangled names in our internal fork of CCTZ.
-// This implementation detail is only needed and provided for the MSVC build.
-//
-// These macros both expand to string literals.  ABSL_INTERNAL_MANGLED_NS is
-// the mangled spelling of the `absl` namespace, and
-// ABSL_INTERNAL_MANGLED_BACKREFERENCE is a back-reference integer representing
-// the proper count to skip past the CCTZ fork namespace names.  (This number
-// is one larger when there is an inline namespace name to skip.)
-#if defined(_MSC_VER)
-#if ABSL_OPTION_USE_INLINE_NAMESPACE == 0
-#define ABSL_INTERNAL_MANGLED_NS "absl"
-#define ABSL_INTERNAL_MANGLED_BACKREFERENCE "5"
-#else
-#define ABSL_INTERNAL_MANGLED_NS \
-  ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME) "@absl"
-#define ABSL_INTERNAL_MANGLED_BACKREFERENCE "6"
-#endif
-#endif
-
-#undef ABSL_INTERNAL_HAS_KEYWORD
-
-// ABSL_DLL
-//
-// When building Abseil as a DLL, this macro expands to `__declspec(dllexport)`
-// so we can annotate symbols appropriately as being exported. When used in
-// headers consuming a DLL, this macro expands to `__declspec(dllimport)` so
-// that consumers know the symbol is defined inside the DLL. In all other cases,
-// the macro expands to nothing.
-#if defined(_MSC_VER)
-#if defined(ABSL_BUILD_DLL)
-#define ABSL_DLL __declspec(dllexport)
-#elif defined(ABSL_CONSUME_DLL)
-#define ABSL_DLL __declspec(dllimport)
-#else
-#define ABSL_DLL
-#endif
-#else
-#define ABSL_DLL
-#endif  // defined(_MSC_VER)
-
-// ABSL_HAVE_MEMORY_SANITIZER
-//
-// MemorySanitizer (MSan) is a detector of uninitialized reads. It consists of
-// a compiler instrumentation module and a run-time library.
-#ifdef ABSL_HAVE_MEMORY_SANITIZER
-#error "ABSL_HAVE_MEMORY_SANITIZER cannot be directly set."
-#elif defined(MEMORY_SANITIZER)
-// The MEMORY_SANITIZER macro is deprecated but we will continue to honor it
-// for now.
-#define ABSL_HAVE_MEMORY_SANITIZER 1
-#elif defined(__SANITIZE_MEMORY__)
-#define ABSL_HAVE_MEMORY_SANITIZER 1
-#elif !defined(__native_client__) && ABSL_HAVE_FEATURE(memory_sanitizer)
-#define ABSL_HAVE_MEMORY_SANITIZER 1
-#endif
-
-// ABSL_HAVE_THREAD_SANITIZER
-//
-// ThreadSanitizer (TSan) is a fast data race detector.
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-#error "ABSL_HAVE_THREAD_SANITIZER cannot be directly set."
-#elif defined(THREAD_SANITIZER)
-// The THREAD_SANITIZER macro is deprecated but we will continue to honor it
-// for now.
-#define ABSL_HAVE_THREAD_SANITIZER 1
-#elif defined(__SANITIZE_THREAD__)
-#define ABSL_HAVE_THREAD_SANITIZER 1
-#elif ABSL_HAVE_FEATURE(thread_sanitizer)
-#define ABSL_HAVE_THREAD_SANITIZER 1
-#endif
-
-// ABSL_HAVE_ADDRESS_SANITIZER
-//
-// AddressSanitizer (ASan) is a fast memory error detector.
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-#error "ABSL_HAVE_ADDRESS_SANITIZER cannot be directly set."
-#elif defined(ADDRESS_SANITIZER)
-// The ADDRESS_SANITIZER macro is deprecated but we will continue to honor it
-// for now.
-#define ABSL_HAVE_ADDRESS_SANITIZER 1
-#elif defined(__SANITIZE_ADDRESS__)
-#define ABSL_HAVE_ADDRESS_SANITIZER 1
-#elif ABSL_HAVE_FEATURE(address_sanitizer)
-#define ABSL_HAVE_ADDRESS_SANITIZER 1
-#endif
-
-#endif  // ABSL_BASE_CONFIG_H_
diff --git a/third_party/abseil/absl/base/config_test.cc b/third_party/abseil/absl/base/config_test.cc
deleted file mode 100644
index 7e0c033..0000000
--- a/third_party/abseil/absl/base/config_test.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/config.h"
-
-#include <cstdint>
-
-#include "gtest/gtest.h"
-#include "absl/synchronization/internal/thread_pool.h"
-
-namespace {
-
-TEST(ConfigTest, Endianness) {
-  union {
-    uint32_t value;
-    uint8_t data[sizeof(uint32_t)];
-  } number;
-  number.data[0] = 0x00;
-  number.data[1] = 0x01;
-  number.data[2] = 0x02;
-  number.data[3] = 0x03;
-#if defined(ABSL_IS_LITTLE_ENDIAN) && defined(ABSL_IS_BIG_ENDIAN)
-#error Both ABSL_IS_LITTLE_ENDIAN and ABSL_IS_BIG_ENDIAN are defined
-#elif defined(ABSL_IS_LITTLE_ENDIAN)
-  EXPECT_EQ(UINT32_C(0x03020100), number.value);
-#elif defined(ABSL_IS_BIG_ENDIAN)
-  EXPECT_EQ(UINT32_C(0x00010203), number.value);
-#else
-#error Unknown endianness
-#endif
-}
-
-#if defined(ABSL_HAVE_THREAD_LOCAL)
-TEST(ConfigTest, ThreadLocal) {
-  static thread_local int mine_mine_mine = 16;
-  EXPECT_EQ(16, mine_mine_mine);
-  {
-    absl::synchronization_internal::ThreadPool pool(1);
-    pool.Schedule([&] {
-      EXPECT_EQ(16, mine_mine_mine);
-      mine_mine_mine = 32;
-      EXPECT_EQ(32, mine_mine_mine);
-    });
-  }
-  EXPECT_EQ(16, mine_mine_mine);
-}
-#endif
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/const_init.h b/third_party/abseil/absl/base/const_init.h
deleted file mode 100644
index 16520b6..0000000
--- a/third_party/abseil/absl/base/const_init.h
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// kConstInit
-// -----------------------------------------------------------------------------
-//
-// A constructor tag used to mark an object as safe for use as a global
-// variable, avoiding the usual lifetime issues that can affect globals.
-
-#ifndef ABSL_BASE_CONST_INIT_H_
-#define ABSL_BASE_CONST_INIT_H_
-
-#include "absl/base/config.h"
-
-// In general, objects with static storage duration (such as global variables)
-// can trigger tricky object lifetime situations.  Attempting to access them
-// from the constructors or destructors of other global objects can result in
-// undefined behavior, unless their constructors and destructors are designed
-// with this issue in mind.
-//
-// The normal way to deal with this issue in C++11 is to use constant
-// initialization and trivial destructors.
-//
-// Constant initialization is guaranteed to occur before any other code
-// executes.  Constructors that are declared 'constexpr' are eligible for
-// constant initialization.  You can annotate a variable declaration with the
-// ABSL_CONST_INIT macro to express this intent.  For compilers that support
-// it, this annotation will cause a compilation error for declarations that
-// aren't subject to constant initialization (perhaps because a runtime value
-// was passed as a constructor argument).
-//
-// On program shutdown, lifetime issues can be avoided on global objects by
-// ensuring that they contain  trivial destructors.  A class has a trivial
-// destructor unless it has a user-defined destructor, a virtual method or base
-// class, or a data member or base class with a non-trivial destructor of its
-// own.  Objects with static storage duration and a trivial destructor are not
-// cleaned up on program shutdown, and are thus safe to access from other code
-// running during shutdown.
-//
-// For a few core Abseil classes, we make a best effort to allow for safe global
-// instances, even though these classes have non-trivial destructors.  These
-// objects can be created with the absl::kConstInit tag.  For example:
-//   ABSL_CONST_INIT absl::Mutex global_mutex(absl::kConstInit);
-//
-// The line above declares a global variable of type absl::Mutex which can be
-// accessed at any point during startup or shutdown.  global_mutex's destructor
-// will still run, but will not invalidate the object.  Note that C++ specifies
-// that accessing an object after its destructor has run results in undefined
-// behavior, but this pattern works on the toolchains we support.
-//
-// The absl::kConstInit tag should only be used to define objects with static
-// or thread_local storage duration.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-enum ConstInitType {
-  kConstInit,
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_CONST_INIT_H_
diff --git a/third_party/abseil/absl/base/dynamic_annotations.h b/third_party/abseil/absl/base/dynamic_annotations.h
deleted file mode 100644
index 545f8cb..0000000
--- a/third_party/abseil/absl/base/dynamic_annotations.h
+++ /dev/null
@@ -1,482 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file defines dynamic annotations for use with dynamic analysis tool
-// such as valgrind, PIN, etc.
-//
-// Dynamic annotation is a source code annotation that affects the generated
-// code (that is, the annotation is not a comment). Each such annotation is
-// attached to a particular instruction and/or to a particular object (address)
-// in the program.
-//
-// The annotations that should be used by users are macros in all upper-case
-// (e.g., ABSL_ANNOTATE_THREAD_NAME).
-//
-// Actual implementation of these macros may differ depending on the dynamic
-// analysis tool being used.
-//
-// This file supports the following configurations:
-// - Dynamic Annotations enabled (with static thread-safety warnings disabled).
-//   In this case, macros expand to functions implemented by Thread Sanitizer,
-//   when building with TSan. When not provided an external implementation,
-//   dynamic_annotations.cc provides no-op implementations.
-//
-// - Static Clang thread-safety warnings enabled.
-//   When building with a Clang compiler that supports thread-safety warnings,
-//   a subset of annotations can be statically-checked at compile-time. We
-//   expand these macros to static-inline functions that can be analyzed for
-//   thread-safety, but afterwards elided when building the final binary.
-//
-// - All annotations are disabled.
-//   If neither Dynamic Annotations nor Clang thread-safety warnings are
-//   enabled, then all annotation-macros expand to empty.
-
-#ifndef ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
-#define ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
-
-#include <stddef.h>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#ifdef __cplusplus
-#include "absl/base/macros.h"
-#endif
-
-// TODO(rogeeff): Remove after the backward compatibility period.
-#include "absl/base/internal/dynamic_annotations.h"  // IWYU pragma: export
-
-// -------------------------------------------------------------------------
-// Decide which features are enabled.
-
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-
-#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
-#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED 1
-
-#else
-
-#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 0
-#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 0
-#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 0
-
-// Clang provides limited support for static thread-safety analysis through a
-// feature called Annotalysis. We configure macro-definitions according to
-// whether Annotalysis support is available. When running in opt-mode, GCC
-// will issue a warning, if these attributes are compiled. Only include them
-// when compiling using Clang.
-
-#if defined(__clang__)
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 1
-#if !defined(SWIG)
-#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 1
-#endif
-#else
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
-#endif
-
-// Read/write annotations are enabled in Annotalysis mode; disabled otherwise.
-#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \
-  ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-
-#endif  // ABSL_HAVE_THREAD_SANITIZER
-
-#ifdef __cplusplus
-#define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" {
-#define ABSL_INTERNAL_END_EXTERN_C }  // extern "C"
-#define ABSL_INTERNAL_GLOBAL_SCOPED(F) ::F
-#define ABSL_INTERNAL_STATIC_INLINE inline
-#else
-#define ABSL_INTERNAL_BEGIN_EXTERN_C  // empty
-#define ABSL_INTERNAL_END_EXTERN_C    // empty
-#define ABSL_INTERNAL_GLOBAL_SCOPED(F) F
-#define ABSL_INTERNAL_STATIC_INLINE static inline
-#endif
-
-// -------------------------------------------------------------------------
-// Define race annotations.
-
-#if ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 1
-
-// -------------------------------------------------------------
-// Annotations that suppress errors. It is usually better to express the
-// program's synchronization using the other annotations, but these can be used
-// when all else fails.
-
-// Report that we may have a benign race at `pointer`, with size
-// "sizeof(*(pointer))". `pointer` must be a non-void* pointer. Insert at the
-// point where `pointer` has been allocated, preferably close to the point
-// where the race happens. See also ABSL_ANNOTATE_BENIGN_RACE_STATIC.
-#define ABSL_ANNOTATE_BENIGN_RACE(pointer, description) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized)  \
-  (__FILE__, __LINE__, pointer, sizeof(*(pointer)), description)
-
-// Same as ABSL_ANNOTATE_BENIGN_RACE(`address`, `description`), but applies to
-// the memory range [`address`, `address`+`size`).
-#define ABSL_ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized)              \
-  (__FILE__, __LINE__, address, size, description)
-
-// Enable (`enable`!=0) or disable (`enable`==0) race detection for all threads.
-// This annotation could be useful if you want to skip expensive race analysis
-// during some period of program execution, e.g. during initialization.
-#define ABSL_ANNOTATE_ENABLE_RACE_DETECTION(enable)        \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateEnableRaceDetection) \
-  (__FILE__, __LINE__, enable)
-
-// -------------------------------------------------------------
-// Annotations useful for debugging.
-
-// Report the current thread `name` to a race detector.
-#define ABSL_ANNOTATE_THREAD_NAME(name) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateThreadName)(__FILE__, __LINE__, name)
-
-// -------------------------------------------------------------
-// Annotations useful when implementing locks. They are not normally needed by
-// modules that merely use locks. The `lock` argument is a pointer to the lock
-// object.
-
-// Report that a lock has been created at address `lock`.
-#define ABSL_ANNOTATE_RWLOCK_CREATE(lock) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock)
-
-// Report that a linker initialized lock has been created at address `lock`.
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock)          \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \
-  (__FILE__, __LINE__, lock)
-#else
-#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock) \
-  ABSL_ANNOTATE_RWLOCK_CREATE(lock)
-#endif
-
-// Report that the lock at address `lock` is about to be destroyed.
-#define ABSL_ANNOTATE_RWLOCK_DESTROY(lock) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockDestroy)(__FILE__, __LINE__, lock)
-
-// Report that the lock at address `lock` has been acquired.
-// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
-#define ABSL_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)     \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockAcquired) \
-  (__FILE__, __LINE__, lock, is_w)
-
-// Report that the lock at address `lock` is about to be released.
-// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
-#define ABSL_ANNOTATE_RWLOCK_RELEASED(lock, is_w)     \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockReleased) \
-  (__FILE__, __LINE__, lock, is_w)
-
-// Apply ABSL_ANNOTATE_BENIGN_RACE_SIZED to a static variable `static_var`.
-#define ABSL_ANNOTATE_BENIGN_RACE_STATIC(static_var, description)      \
-  namespace {                                                          \
-  class static_var##_annotator {                                       \
-   public:                                                             \
-    static_var##_annotator() {                                         \
-      ABSL_ANNOTATE_BENIGN_RACE_SIZED(&static_var, sizeof(static_var), \
-                                      #static_var ": " description);   \
-    }                                                                  \
-  };                                                                   \
-  static static_var##_annotator the##static_var##_annotator;           \
-  }  // namespace
-
-// Function prototypes of annotations provided by the compiler-based sanitizer
-// implementation.
-ABSL_INTERNAL_BEGIN_EXTERN_C
-void AnnotateRWLockCreate(const char* file, int line,
-                          const volatile void* lock);
-void AnnotateRWLockCreateStatic(const char* file, int line,
-                                const volatile void* lock);
-void AnnotateRWLockDestroy(const char* file, int line,
-                           const volatile void* lock);
-void AnnotateRWLockAcquired(const char* file, int line,
-                            const volatile void* lock, long is_w);  // NOLINT
-void AnnotateRWLockReleased(const char* file, int line,
-                            const volatile void* lock, long is_w);  // NOLINT
-void AnnotateBenignRace(const char* file, int line,
-                        const volatile void* address, const char* description);
-void AnnotateBenignRaceSized(const char* file, int line,
-                             const volatile void* address, size_t size,
-                             const char* description);
-void AnnotateThreadName(const char* file, int line, const char* name);
-void AnnotateEnableRaceDetection(const char* file, int line, int enable);
-ABSL_INTERNAL_END_EXTERN_C
-
-#else  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 0
-
-#define ABSL_ANNOTATE_RWLOCK_CREATE(lock)                            // empty
-#define ABSL_ANNOTATE_RWLOCK_CREATE_STATIC(lock)                     // empty
-#define ABSL_ANNOTATE_RWLOCK_DESTROY(lock)                           // empty
-#define ABSL_ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)                    // empty
-#define ABSL_ANNOTATE_RWLOCK_RELEASED(lock, is_w)                    // empty
-#define ABSL_ANNOTATE_BENIGN_RACE(address, description)              // empty
-#define ABSL_ANNOTATE_BENIGN_RACE_SIZED(address, size, description)  // empty
-#define ABSL_ANNOTATE_THREAD_NAME(name)                              // empty
-#define ABSL_ANNOTATE_ENABLE_RACE_DETECTION(enable)                  // empty
-#define ABSL_ANNOTATE_BENIGN_RACE_STATIC(static_var, description)    // empty
-
-#endif  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
-
-// -------------------------------------------------------------------------
-// Define memory annotations.
-
-#ifdef ABSL_HAVE_MEMORY_SANITIZER
-
-#include <sanitizer/msan_interface.h>
-
-#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
-  __msan_unpoison(address, size)
-
-#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
-  __msan_allocated_memory(address, size)
-
-#else  // !defined(ABSL_HAVE_MEMORY_SANITIZER)
-
-// TODO(rogeeff): remove this branch
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
-  do {                                                     \
-    (void)(address);                                       \
-    (void)(size);                                          \
-  } while (0)
-#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
-  do {                                                       \
-    (void)(address);                                         \
-    (void)(size);                                            \
-  } while (0)
-#else
-
-#define ABSL_ANNOTATE_MEMORY_IS_INITIALIZED(address, size)    // empty
-#define ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size)  // empty
-
-#endif
-
-#endif  // ABSL_HAVE_MEMORY_SANITIZER
-
-// -------------------------------------------------------------------------
-// Define IGNORE_READS_BEGIN/_END attributes.
-
-#if defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE \
-  __attribute((exclusive_lock_function("*")))
-#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE \
-  __attribute((unlock_function("*")))
-
-#else  // !defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE  // empty
-#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE    // empty
-
-#endif  // defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-// -------------------------------------------------------------------------
-// Define IGNORE_READS_BEGIN/_END annotations.
-
-#if ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED == 1
-
-// Request the analysis tool to ignore all reads in the current thread until
-// ABSL_ANNOTATE_IGNORE_READS_END is called. Useful to ignore intentional racey
-// reads, while still checking other reads and all writes.
-// See also ABSL_ANNOTATE_UNPROTECTED_READ.
-#define ABSL_ANNOTATE_IGNORE_READS_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsBegin)(__FILE__, __LINE__)
-
-// Stop ignoring reads.
-#define ABSL_ANNOTATE_IGNORE_READS_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsEnd)(__FILE__, __LINE__)
-
-// Function prototypes of annotations provided by the compiler-based sanitizer
-// implementation.
-ABSL_INTERNAL_BEGIN_EXTERN_C
-void AnnotateIgnoreReadsBegin(const char* file, int line)
-    ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE;
-void AnnotateIgnoreReadsEnd(const char* file,
-                            int line) ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE;
-ABSL_INTERNAL_END_EXTERN_C
-
-#elif defined(ABSL_INTERNAL_ANNOTALYSIS_ENABLED)
-
-// When Annotalysis is enabled without Dynamic Annotations, the use of
-// static-inline functions allows the annotations to be read at compile-time,
-// while still letting the compiler elide the functions from the final build.
-//
-// TODO(delesley) -- The exclusive lock here ignores writes as well, but
-// allows IGNORE_READS_AND_WRITES to work properly.
-
-#define ABSL_ANNOTATE_IGNORE_READS_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsBegin)()
-
-#define ABSL_ANNOTATE_IGNORE_READS_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsEnd)()
-
-ABSL_INTERNAL_STATIC_INLINE void AbslInternalAnnotateIgnoreReadsBegin()
-    ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE {}
-
-ABSL_INTERNAL_STATIC_INLINE void AbslInternalAnnotateIgnoreReadsEnd()
-    ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE {}
-
-#else
-
-#define ABSL_ANNOTATE_IGNORE_READS_BEGIN()  // empty
-#define ABSL_ANNOTATE_IGNORE_READS_END()    // empty
-
-#endif
-
-// -------------------------------------------------------------------------
-// Define IGNORE_WRITES_BEGIN/_END annotations.
-
-#if ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED == 1
-
-// Similar to ABSL_ANNOTATE_IGNORE_READS_BEGIN, but ignore writes instead.
-#define ABSL_ANNOTATE_IGNORE_WRITES_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesBegin)(__FILE__, __LINE__)
-
-// Stop ignoring writes.
-#define ABSL_ANNOTATE_IGNORE_WRITES_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesEnd)(__FILE__, __LINE__)
-
-// Function prototypes of annotations provided by the compiler-based sanitizer
-// implementation.
-ABSL_INTERNAL_BEGIN_EXTERN_C
-void AnnotateIgnoreWritesBegin(const char* file, int line);
-void AnnotateIgnoreWritesEnd(const char* file, int line);
-ABSL_INTERNAL_END_EXTERN_C
-
-#else
-
-#define ABSL_ANNOTATE_IGNORE_WRITES_BEGIN()  // empty
-#define ABSL_ANNOTATE_IGNORE_WRITES_END()    // empty
-
-#endif
-
-// -------------------------------------------------------------------------
-// Define the ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_* annotations using the more
-// primitive annotations defined above.
-//
-//     Instead of doing
-//        ABSL_ANNOTATE_IGNORE_READS_BEGIN();
-//        ... = x;
-//        ABSL_ANNOTATE_IGNORE_READS_END();
-//     one can use
-//        ... = ABSL_ANNOTATE_UNPROTECTED_READ(x);
-
-#if defined(ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED)
-
-// Start ignoring all memory accesses (both reads and writes).
-#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \
-  do {                                                \
-    ABSL_ANNOTATE_IGNORE_READS_BEGIN();               \
-    ABSL_ANNOTATE_IGNORE_WRITES_BEGIN();              \
-  } while (0)
-
-// Stop ignoring both reads and writes.
-#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END() \
-  do {                                              \
-    ABSL_ANNOTATE_IGNORE_WRITES_END();              \
-    ABSL_ANNOTATE_IGNORE_READS_END();               \
-  } while (0)
-
-#ifdef __cplusplus
-// ABSL_ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads.
-#define ABSL_ANNOTATE_UNPROTECTED_READ(x) \
-  absl::base_internal::AnnotateUnprotectedRead(x)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-template <typename T>
-inline T AnnotateUnprotectedRead(const volatile T& x) {  // NOLINT
-  ABSL_ANNOTATE_IGNORE_READS_BEGIN();
-  T res = x;
-  ABSL_ANNOTATE_IGNORE_READS_END();
-  return res;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif
-
-#else
-
-#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN()  // empty
-#define ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END()    // empty
-#define ABSL_ANNOTATE_UNPROTECTED_READ(x) (x)
-
-#endif
-
-#ifdef __cplusplus
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-ABSL_INTERNAL_BEGIN_EXTERN_C
-int RunningOnValgrind();
-double ValgrindSlowdown();
-ABSL_INTERNAL_END_EXTERN_C
-#else
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-ABSL_DEPRECATED(
-    "Don't use this interface. It is misleading and is being deleted.")
-ABSL_ATTRIBUTE_ALWAYS_INLINE inline int RunningOnValgrind() { return 0; }
-ABSL_DEPRECATED(
-    "Don't use this interface. It is misleading and is being deleted.")
-ABSL_ATTRIBUTE_ALWAYS_INLINE inline double ValgrindSlowdown() { return 1.0; }
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-using absl::base_internal::RunningOnValgrind;
-using absl::base_internal::ValgrindSlowdown;
-#endif
-#endif
-
-// -------------------------------------------------------------------------
-// Address sanitizer annotations
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-// Describe the current state of a contiguous container such as e.g.
-// std::vector or std::string. For more details see
-// sanitizer/common_interface_defs.h, which is provided by the compiler.
-#include <sanitizer/common_interface_defs.h>
-
-#define ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) \
-  __sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid)
-#define ABSL_ADDRESS_SANITIZER_REDZONE(name) \
-  struct {                                   \
-    char x[8] __attribute__((aligned(8)));   \
-  } name
-
-#else
-
-#define ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid)  // empty
-#define ABSL_ADDRESS_SANITIZER_REDZONE(name) static_assert(true, "")
-
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-
-// -------------------------------------------------------------------------
-// Undefine the macros intended only for this file.
-
-#undef ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-#undef ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_BEGIN_EXTERN_C
-#undef ABSL_INTERNAL_END_EXTERN_C
-#undef ABSL_INTERNAL_STATIC_INLINE
-
-#endif  // ABSL_BASE_DYNAMIC_ANNOTATIONS_H_
diff --git a/third_party/abseil/absl/base/exception_safety_testing_test.cc b/third_party/abseil/absl/base/exception_safety_testing_test.cc
deleted file mode 100644
index a59be29..0000000
--- a/third_party/abseil/absl/base/exception_safety_testing_test.cc
+++ /dev/null
@@ -1,956 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/exception_safety_testing.h"
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#include <cstddef>
-#include <exception>
-#include <iostream>
-#include <list>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-#include "absl/memory/memory.h"
-
-namespace testing {
-
-namespace {
-
-using ::testing::exceptions_internal::SetCountdown;
-using ::testing::exceptions_internal::TestException;
-using ::testing::exceptions_internal::UnsetCountdown;
-
-// EXPECT_NO_THROW can't inspect the thrown inspection in general.
-template <typename F>
-void ExpectNoThrow(const F& f) {
-  try {
-    f();
-  } catch (const TestException& e) {
-    ADD_FAILURE() << "Unexpected exception thrown from " << e.what();
-  }
-}
-
-TEST(ThrowingValueTest, Throws) {
-  SetCountdown();
-  EXPECT_THROW(ThrowingValue<> bomb, TestException);
-
-  // It's not guaranteed that every operator only throws *once*.  The default
-  // ctor only throws once, though, so use it to make sure we only throw when
-  // the countdown hits 0
-  SetCountdown(2);
-  ExpectNoThrow([]() { ThrowingValue<> bomb; });
-  ExpectNoThrow([]() { ThrowingValue<> bomb; });
-  EXPECT_THROW(ThrowingValue<> bomb, TestException);
-
-  UnsetCountdown();
-}
-
-// Tests that an operation throws when the countdown is at 0, doesn't throw when
-// the countdown doesn't hit 0, and doesn't modify the state of the
-// ThrowingValue if it throws
-template <typename F>
-void TestOp(const F& f) {
-  ExpectNoThrow(f);
-
-  SetCountdown();
-  EXPECT_THROW(f(), TestException);
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, ThrowingCtors) {
-  ThrowingValue<> bomb;
-
-  TestOp([]() { ThrowingValue<> bomb(1); });
-  TestOp([&]() { ThrowingValue<> bomb1 = bomb; });
-  TestOp([&]() { ThrowingValue<> bomb1 = std::move(bomb); });
-}
-
-TEST(ThrowingValueTest, ThrowingAssignment) {
-  ThrowingValue<> bomb, bomb1;
-
-  TestOp([&]() { bomb = bomb1; });
-  TestOp([&]() { bomb = std::move(bomb1); });
-
-  // Test that when assignment throws, the assignment should fail (lhs != rhs)
-  // and strong guarantee fails (lhs != lhs_copy).
-  {
-    ThrowingValue<> lhs(39), rhs(42);
-    ThrowingValue<> lhs_copy(lhs);
-    SetCountdown();
-    EXPECT_THROW(lhs = rhs, TestException);
-    UnsetCountdown();
-    EXPECT_NE(lhs, rhs);
-    EXPECT_NE(lhs_copy, lhs);
-  }
-  {
-    ThrowingValue<> lhs(39), rhs(42);
-    ThrowingValue<> lhs_copy(lhs), rhs_copy(rhs);
-    SetCountdown();
-    EXPECT_THROW(lhs = std::move(rhs), TestException);
-    UnsetCountdown();
-    EXPECT_NE(lhs, rhs_copy);
-    EXPECT_NE(lhs_copy, lhs);
-  }
-}
-
-TEST(ThrowingValueTest, ThrowingComparisons) {
-  ThrowingValue<> bomb1, bomb2;
-  TestOp([&]() { return bomb1 == bomb2; });
-  TestOp([&]() { return bomb1 != bomb2; });
-  TestOp([&]() { return bomb1 < bomb2; });
-  TestOp([&]() { return bomb1 <= bomb2; });
-  TestOp([&]() { return bomb1 > bomb2; });
-  TestOp([&]() { return bomb1 >= bomb2; });
-}
-
-TEST(ThrowingValueTest, ThrowingArithmeticOps) {
-  ThrowingValue<> bomb1(1), bomb2(2);
-
-  TestOp([&bomb1]() { +bomb1; });
-  TestOp([&bomb1]() { -bomb1; });
-  TestOp([&bomb1]() { ++bomb1; });
-  TestOp([&bomb1]() { bomb1++; });
-  TestOp([&bomb1]() { --bomb1; });
-  TestOp([&bomb1]() { bomb1--; });
-
-  TestOp([&]() { bomb1 + bomb2; });
-  TestOp([&]() { bomb1 - bomb2; });
-  TestOp([&]() { bomb1* bomb2; });
-  TestOp([&]() { bomb1 / bomb2; });
-  TestOp([&]() { bomb1 << 1; });
-  TestOp([&]() { bomb1 >> 1; });
-}
-
-TEST(ThrowingValueTest, ThrowingLogicalOps) {
-  ThrowingValue<> bomb1, bomb2;
-
-  TestOp([&bomb1]() { !bomb1; });
-  TestOp([&]() { bomb1&& bomb2; });
-  TestOp([&]() { bomb1 || bomb2; });
-}
-
-TEST(ThrowingValueTest, ThrowingBitwiseOps) {
-  ThrowingValue<> bomb1, bomb2;
-
-  TestOp([&bomb1]() { ~bomb1; });
-  TestOp([&]() { bomb1& bomb2; });
-  TestOp([&]() { bomb1 | bomb2; });
-  TestOp([&]() { bomb1 ^ bomb2; });
-}
-
-TEST(ThrowingValueTest, ThrowingCompoundAssignmentOps) {
-  ThrowingValue<> bomb1(1), bomb2(2);
-
-  TestOp([&]() { bomb1 += bomb2; });
-  TestOp([&]() { bomb1 -= bomb2; });
-  TestOp([&]() { bomb1 *= bomb2; });
-  TestOp([&]() { bomb1 /= bomb2; });
-  TestOp([&]() { bomb1 %= bomb2; });
-  TestOp([&]() { bomb1 &= bomb2; });
-  TestOp([&]() { bomb1 |= bomb2; });
-  TestOp([&]() { bomb1 ^= bomb2; });
-  TestOp([&]() { bomb1 *= bomb2; });
-}
-
-TEST(ThrowingValueTest, ThrowingStreamOps) {
-  ThrowingValue<> bomb;
-
-  TestOp([&]() {
-    std::istringstream stream;
-    stream >> bomb;
-  });
-  TestOp([&]() {
-    std::stringstream stream;
-    stream << bomb;
-  });
-}
-
-// Tests the operator<< of ThrowingValue by forcing ConstructorTracker to emit
-// a nonfatal failure that contains the string representation of the Thrower
-TEST(ThrowingValueTest, StreamOpsOutput) {
-  using ::testing::TypeSpec;
-  exceptions_internal::ConstructorTracker ct(exceptions_internal::countdown);
-
-  // Test default spec list (kEverythingThrows)
-  EXPECT_NONFATAL_FAILURE(
-      {
-        using Thrower = ThrowingValue<TypeSpec{}>;
-        auto thrower = Thrower(123);
-        thrower.~Thrower();
-      },
-      "ThrowingValue<>(123)");
-
-  // Test with one item in spec list (kNoThrowCopy)
-  EXPECT_NONFATAL_FAILURE(
-      {
-        using Thrower = ThrowingValue<TypeSpec::kNoThrowCopy>;
-        auto thrower = Thrower(234);
-        thrower.~Thrower();
-      },
-      "ThrowingValue<kNoThrowCopy>(234)");
-
-  // Test with multiple items in spec list (kNoThrowMove, kNoThrowNew)
-  EXPECT_NONFATAL_FAILURE(
-      {
-        using Thrower =
-            ThrowingValue<TypeSpec::kNoThrowMove | TypeSpec::kNoThrowNew>;
-        auto thrower = Thrower(345);
-        thrower.~Thrower();
-      },
-      "ThrowingValue<kNoThrowMove | kNoThrowNew>(345)");
-
-  // Test with all items in spec list (kNoThrowCopy, kNoThrowMove, kNoThrowNew)
-  EXPECT_NONFATAL_FAILURE(
-      {
-        using Thrower = ThrowingValue<static_cast<TypeSpec>(-1)>;
-        auto thrower = Thrower(456);
-        thrower.~Thrower();
-      },
-      "ThrowingValue<kNoThrowCopy | kNoThrowMove | kNoThrowNew>(456)");
-}
-
-template <typename F>
-void TestAllocatingOp(const F& f) {
-  ExpectNoThrow(f);
-
-  SetCountdown();
-  EXPECT_THROW(f(), exceptions_internal::TestBadAllocException);
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, ThrowingAllocatingOps) {
-  // make_unique calls unqualified operator new, so these exercise the
-  // ThrowingValue overloads.
-  TestAllocatingOp([]() { return absl::make_unique<ThrowingValue<>>(1); });
-  TestAllocatingOp([]() { return absl::make_unique<ThrowingValue<>[]>(2); });
-}
-
-TEST(ThrowingValueTest, NonThrowingMoveCtor) {
-  ThrowingValue<TypeSpec::kNoThrowMove> nothrow_ctor;
-
-  SetCountdown();
-  ExpectNoThrow([&nothrow_ctor]() {
-    ThrowingValue<TypeSpec::kNoThrowMove> nothrow1 = std::move(nothrow_ctor);
-  });
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, NonThrowingMoveAssign) {
-  ThrowingValue<TypeSpec::kNoThrowMove> nothrow_assign1, nothrow_assign2;
-
-  SetCountdown();
-  ExpectNoThrow([&nothrow_assign1, &nothrow_assign2]() {
-    nothrow_assign1 = std::move(nothrow_assign2);
-  });
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, ThrowingCopyCtor) {
-  ThrowingValue<> tv;
-
-  TestOp([&]() { ThrowingValue<> tv_copy(tv); });
-}
-
-TEST(ThrowingValueTest, ThrowingCopyAssign) {
-  ThrowingValue<> tv1, tv2;
-
-  TestOp([&]() { tv1 = tv2; });
-}
-
-TEST(ThrowingValueTest, NonThrowingCopyCtor) {
-  ThrowingValue<TypeSpec::kNoThrowCopy> nothrow_ctor;
-
-  SetCountdown();
-  ExpectNoThrow([&nothrow_ctor]() {
-    ThrowingValue<TypeSpec::kNoThrowCopy> nothrow1(nothrow_ctor);
-  });
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, NonThrowingCopyAssign) {
-  ThrowingValue<TypeSpec::kNoThrowCopy> nothrow_assign1, nothrow_assign2;
-
-  SetCountdown();
-  ExpectNoThrow([&nothrow_assign1, &nothrow_assign2]() {
-    nothrow_assign1 = nothrow_assign2;
-  });
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, ThrowingSwap) {
-  ThrowingValue<> bomb1, bomb2;
-  TestOp([&]() { std::swap(bomb1, bomb2); });
-}
-
-TEST(ThrowingValueTest, NonThrowingSwap) {
-  ThrowingValue<TypeSpec::kNoThrowMove> bomb1, bomb2;
-  ExpectNoThrow([&]() { std::swap(bomb1, bomb2); });
-}
-
-TEST(ThrowingValueTest, NonThrowingAllocation) {
-  ThrowingValue<TypeSpec::kNoThrowNew>* allocated;
-  ThrowingValue<TypeSpec::kNoThrowNew>* array;
-
-  ExpectNoThrow([&allocated]() {
-    allocated = new ThrowingValue<TypeSpec::kNoThrowNew>(1);
-    delete allocated;
-  });
-  ExpectNoThrow([&array]() {
-    array = new ThrowingValue<TypeSpec::kNoThrowNew>[2];
-    delete[] array;
-  });
-}
-
-TEST(ThrowingValueTest, NonThrowingDelete) {
-  auto* allocated = new ThrowingValue<>(1);
-  auto* array = new ThrowingValue<>[2];
-
-  SetCountdown();
-  ExpectNoThrow([allocated]() { delete allocated; });
-  SetCountdown();
-  ExpectNoThrow([array]() { delete[] array; });
-
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, NonThrowingPlacementDelete) {
-  constexpr int kArrayLen = 2;
-  // We intentionally create extra space to store the tag allocated by placement
-  // new[].
-  constexpr int kStorageLen = 4;
-
-  alignas(ThrowingValue<>) unsigned char buf[sizeof(ThrowingValue<>)];
-  alignas(ThrowingValue<>) unsigned char
-      array_buf[sizeof(ThrowingValue<>[kStorageLen])];
-  auto* placed = new (&buf) ThrowingValue<>(1);
-  auto placed_array = new (&array_buf) ThrowingValue<>[kArrayLen];
-
-  SetCountdown();
-  ExpectNoThrow([placed, &buf]() {
-    placed->~ThrowingValue<>();
-    ThrowingValue<>::operator delete(placed, &buf);
-  });
-
-  SetCountdown();
-  ExpectNoThrow([&, placed_array]() {
-    for (int i = 0; i < kArrayLen; ++i) placed_array[i].~ThrowingValue<>();
-    ThrowingValue<>::operator delete[](placed_array, &array_buf);
-  });
-
-  UnsetCountdown();
-}
-
-TEST(ThrowingValueTest, NonThrowingDestructor) {
-  auto* allocated = new ThrowingValue<>();
-
-  SetCountdown();
-  ExpectNoThrow([allocated]() { delete allocated; });
-  UnsetCountdown();
-}
-
-TEST(ThrowingBoolTest, ThrowingBool) {
-  ThrowingBool t = true;
-
-  // Test that it's contextually convertible to bool
-  if (t) {  // NOLINT(whitespace/empty_if_body)
-  }
-  EXPECT_TRUE(t);
-
-  TestOp([&]() { (void)!t; });
-}
-
-TEST(ThrowingAllocatorTest, MemoryManagement) {
-  // Just exercise the memory management capabilities under LSan to make sure we
-  // don't leak.
-  ThrowingAllocator<int> int_alloc;
-  int* ip = int_alloc.allocate(1);
-  int_alloc.deallocate(ip, 1);
-  int* i_array = int_alloc.allocate(2);
-  int_alloc.deallocate(i_array, 2);
-
-  ThrowingAllocator<ThrowingValue<>> tv_alloc;
-  ThrowingValue<>* ptr = tv_alloc.allocate(1);
-  tv_alloc.deallocate(ptr, 1);
-  ThrowingValue<>* tv_array = tv_alloc.allocate(2);
-  tv_alloc.deallocate(tv_array, 2);
-}
-
-TEST(ThrowingAllocatorTest, CallsGlobalNew) {
-  ThrowingAllocator<ThrowingValue<>, AllocSpec::kNoThrowAllocate> nothrow_alloc;
-  ThrowingValue<>* ptr;
-
-  SetCountdown();
-  // This will only throw if ThrowingValue::new is called.
-  ExpectNoThrow([&]() { ptr = nothrow_alloc.allocate(1); });
-  nothrow_alloc.deallocate(ptr, 1);
-
-  UnsetCountdown();
-}
-
-TEST(ThrowingAllocatorTest, ThrowingConstructors) {
-  ThrowingAllocator<int> int_alloc;
-  int* ip = nullptr;
-
-  SetCountdown();
-  EXPECT_THROW(ip = int_alloc.allocate(1), TestException);
-  ExpectNoThrow([&]() { ip = int_alloc.allocate(1); });
-
-  *ip = 1;
-  SetCountdown();
-  EXPECT_THROW(int_alloc.construct(ip, 2), TestException);
-  EXPECT_EQ(*ip, 1);
-  int_alloc.deallocate(ip, 1);
-
-  UnsetCountdown();
-}
-
-TEST(ThrowingAllocatorTest, NonThrowingConstruction) {
-  {
-    ThrowingAllocator<int, AllocSpec::kNoThrowAllocate> int_alloc;
-    int* ip = nullptr;
-
-    SetCountdown();
-    ExpectNoThrow([&]() { ip = int_alloc.allocate(1); });
-
-    SetCountdown();
-    ExpectNoThrow([&]() { int_alloc.construct(ip, 2); });
-
-    EXPECT_EQ(*ip, 2);
-    int_alloc.deallocate(ip, 1);
-
-    UnsetCountdown();
-  }
-
-  {
-    ThrowingAllocator<int> int_alloc;
-    int* ip = nullptr;
-    ExpectNoThrow([&]() { ip = int_alloc.allocate(1); });
-    ExpectNoThrow([&]() { int_alloc.construct(ip, 2); });
-    EXPECT_EQ(*ip, 2);
-    int_alloc.deallocate(ip, 1);
-  }
-
-  {
-    ThrowingAllocator<ThrowingValue<>, AllocSpec::kNoThrowAllocate>
-        nothrow_alloc;
-    ThrowingValue<>* ptr;
-
-    SetCountdown();
-    ExpectNoThrow([&]() { ptr = nothrow_alloc.allocate(1); });
-
-    SetCountdown();
-    ExpectNoThrow(
-        [&]() { nothrow_alloc.construct(ptr, 2, testing::nothrow_ctor); });
-
-    EXPECT_EQ(ptr->Get(), 2);
-    nothrow_alloc.destroy(ptr);
-    nothrow_alloc.deallocate(ptr, 1);
-
-    UnsetCountdown();
-  }
-
-  {
-    ThrowingAllocator<int> a;
-
-    SetCountdown();
-    ExpectNoThrow([&]() { ThrowingAllocator<double> a1 = a; });
-
-    SetCountdown();
-    ExpectNoThrow([&]() { ThrowingAllocator<double> a1 = std::move(a); });
-
-    UnsetCountdown();
-  }
-}
-
-TEST(ThrowingAllocatorTest, ThrowingAllocatorConstruction) {
-  ThrowingAllocator<int> a;
-  TestOp([]() { ThrowingAllocator<int> a; });
-  TestOp([&]() { a.select_on_container_copy_construction(); });
-}
-
-TEST(ThrowingAllocatorTest, State) {
-  ThrowingAllocator<int> a1, a2;
-  EXPECT_NE(a1, a2);
-
-  auto a3 = a1;
-  EXPECT_EQ(a3, a1);
-  int* ip = a1.allocate(1);
-  EXPECT_EQ(a3, a1);
-  a3.deallocate(ip, 1);
-  EXPECT_EQ(a3, a1);
-}
-
-TEST(ThrowingAllocatorTest, InVector) {
-  std::vector<ThrowingValue<>, ThrowingAllocator<ThrowingValue<>>> v;
-  for (int i = 0; i < 20; ++i) v.push_back({});
-  for (int i = 0; i < 20; ++i) v.pop_back();
-}
-
-TEST(ThrowingAllocatorTest, InList) {
-  std::list<ThrowingValue<>, ThrowingAllocator<ThrowingValue<>>> l;
-  for (int i = 0; i < 20; ++i) l.push_back({});
-  for (int i = 0; i < 20; ++i) l.pop_back();
-  for (int i = 0; i < 20; ++i) l.push_front({});
-  for (int i = 0; i < 20; ++i) l.pop_front();
-}
-
-template <typename TesterInstance, typename = void>
-struct NullaryTestValidator : public std::false_type {};
-
-template <typename TesterInstance>
-struct NullaryTestValidator<
-    TesterInstance,
-    absl::void_t<decltype(std::declval<TesterInstance>().Test())>>
-    : public std::true_type {};
-
-template <typename TesterInstance>
-bool HasNullaryTest(const TesterInstance&) {
-  return NullaryTestValidator<TesterInstance>::value;
-}
-
-void DummyOp(void*) {}
-
-template <typename TesterInstance, typename = void>
-struct UnaryTestValidator : public std::false_type {};
-
-template <typename TesterInstance>
-struct UnaryTestValidator<
-    TesterInstance,
-    absl::void_t<decltype(std::declval<TesterInstance>().Test(DummyOp))>>
-    : public std::true_type {};
-
-template <typename TesterInstance>
-bool HasUnaryTest(const TesterInstance&) {
-  return UnaryTestValidator<TesterInstance>::value;
-}
-
-TEST(ExceptionSafetyTesterTest, IncompleteTypesAreNotTestable) {
-  using T = exceptions_internal::UninitializedT;
-  auto op = [](T* t) {};
-  auto inv = [](T*) { return testing::AssertionSuccess(); };
-  auto fac = []() { return absl::make_unique<T>(); };
-
-  // Test that providing operation and inveriants still does not allow for the
-  // the invocation of .Test() and .Test(op) because it lacks a factory
-  auto without_fac =
-      testing::MakeExceptionSafetyTester().WithOperation(op).WithContracts(
-          inv, testing::strong_guarantee);
-  EXPECT_FALSE(HasNullaryTest(without_fac));
-  EXPECT_FALSE(HasUnaryTest(without_fac));
-
-  // Test that providing contracts and factory allows the invocation of
-  // .Test(op) but does not allow for .Test() because it lacks an operation
-  auto without_op = testing::MakeExceptionSafetyTester()
-                        .WithContracts(inv, testing::strong_guarantee)
-                        .WithFactory(fac);
-  EXPECT_FALSE(HasNullaryTest(without_op));
-  EXPECT_TRUE(HasUnaryTest(without_op));
-
-  // Test that providing operation and factory still does not allow for the
-  // the invocation of .Test() and .Test(op) because it lacks contracts
-  auto without_inv =
-      testing::MakeExceptionSafetyTester().WithOperation(op).WithFactory(fac);
-  EXPECT_FALSE(HasNullaryTest(without_inv));
-  EXPECT_FALSE(HasUnaryTest(without_inv));
-}
-
-struct ExampleStruct {};
-
-std::unique_ptr<ExampleStruct> ExampleFunctionFactory() {
-  return absl::make_unique<ExampleStruct>();
-}
-
-void ExampleFunctionOperation(ExampleStruct*) {}
-
-testing::AssertionResult ExampleFunctionContract(ExampleStruct*) {
-  return testing::AssertionSuccess();
-}
-
-struct {
-  std::unique_ptr<ExampleStruct> operator()() const {
-    return ExampleFunctionFactory();
-  }
-} example_struct_factory;
-
-struct {
-  void operator()(ExampleStruct*) const {}
-} example_struct_operation;
-
-struct {
-  testing::AssertionResult operator()(ExampleStruct* example_struct) const {
-    return ExampleFunctionContract(example_struct);
-  }
-} example_struct_contract;
-
-auto example_lambda_factory = []() { return ExampleFunctionFactory(); };
-
-auto example_lambda_operation = [](ExampleStruct*) {};
-
-auto example_lambda_contract = [](ExampleStruct* example_struct) {
-  return ExampleFunctionContract(example_struct);
-};
-
-// Testing that function references, pointers, structs with operator() and
-// lambdas can all be used with ExceptionSafetyTester
-TEST(ExceptionSafetyTesterTest, MixedFunctionTypes) {
-  // function reference
-  EXPECT_TRUE(testing::MakeExceptionSafetyTester()
-                  .WithFactory(ExampleFunctionFactory)
-                  .WithOperation(ExampleFunctionOperation)
-                  .WithContracts(ExampleFunctionContract)
-                  .Test());
-
-  // function pointer
-  EXPECT_TRUE(testing::MakeExceptionSafetyTester()
-                  .WithFactory(&ExampleFunctionFactory)
-                  .WithOperation(&ExampleFunctionOperation)
-                  .WithContracts(&ExampleFunctionContract)
-                  .Test());
-
-  // struct
-  EXPECT_TRUE(testing::MakeExceptionSafetyTester()
-                  .WithFactory(example_struct_factory)
-                  .WithOperation(example_struct_operation)
-                  .WithContracts(example_struct_contract)
-                  .Test());
-
-  // lambda
-  EXPECT_TRUE(testing::MakeExceptionSafetyTester()
-                  .WithFactory(example_lambda_factory)
-                  .WithOperation(example_lambda_operation)
-                  .WithContracts(example_lambda_contract)
-                  .Test());
-}
-
-struct NonNegative {
-  bool operator==(const NonNegative& other) const { return i == other.i; }
-  int i;
-};
-
-testing::AssertionResult CheckNonNegativeInvariants(NonNegative* g) {
-  if (g->i >= 0) {
-    return testing::AssertionSuccess();
-  }
-  return testing::AssertionFailure()
-         << "i should be non-negative but is " << g->i;
-}
-
-struct {
-  template <typename T>
-  void operator()(T* t) const {
-    (*t)();
-  }
-} invoker;
-
-auto tester =
-    testing::MakeExceptionSafetyTester().WithOperation(invoker).WithContracts(
-        CheckNonNegativeInvariants);
-auto strong_tester = tester.WithContracts(testing::strong_guarantee);
-
-struct FailsBasicGuarantee : public NonNegative {
-  void operator()() {
-    --i;
-    ThrowingValue<> bomb;
-    ++i;
-  }
-};
-
-TEST(ExceptionCheckTest, BasicGuaranteeFailure) {
-  EXPECT_FALSE(tester.WithInitialValue(FailsBasicGuarantee{}).Test());
-}
-
-struct FollowsBasicGuarantee : public NonNegative {
-  void operator()() {
-    ++i;
-    ThrowingValue<> bomb;
-  }
-};
-
-TEST(ExceptionCheckTest, BasicGuarantee) {
-  EXPECT_TRUE(tester.WithInitialValue(FollowsBasicGuarantee{}).Test());
-}
-
-TEST(ExceptionCheckTest, StrongGuaranteeFailure) {
-  EXPECT_FALSE(strong_tester.WithInitialValue(FailsBasicGuarantee{}).Test());
-  EXPECT_FALSE(strong_tester.WithInitialValue(FollowsBasicGuarantee{}).Test());
-}
-
-struct BasicGuaranteeWithExtraContracts : public NonNegative {
-  // After operator(), i is incremented.  If operator() throws, i is set to 9999
-  void operator()() {
-    int old_i = i;
-    i = kExceptionSentinel;
-    ThrowingValue<> bomb;
-    i = ++old_i;
-  }
-
-  static constexpr int kExceptionSentinel = 9999;
-};
-constexpr int BasicGuaranteeWithExtraContracts::kExceptionSentinel;
-
-TEST(ExceptionCheckTest, BasicGuaranteeWithExtraContracts) {
-  auto tester_with_val =
-      tester.WithInitialValue(BasicGuaranteeWithExtraContracts{});
-  EXPECT_TRUE(tester_with_val.Test());
-  EXPECT_TRUE(
-      tester_with_val
-          .WithContracts([](BasicGuaranteeWithExtraContracts* o) {
-            if (o->i == BasicGuaranteeWithExtraContracts::kExceptionSentinel) {
-              return testing::AssertionSuccess();
-            }
-            return testing::AssertionFailure()
-                   << "i should be "
-                   << BasicGuaranteeWithExtraContracts::kExceptionSentinel
-                   << ", but is " << o->i;
-          })
-          .Test());
-}
-
-struct FollowsStrongGuarantee : public NonNegative {
-  void operator()() { ThrowingValue<> bomb; }
-};
-
-TEST(ExceptionCheckTest, StrongGuarantee) {
-  EXPECT_TRUE(tester.WithInitialValue(FollowsStrongGuarantee{}).Test());
-  EXPECT_TRUE(strong_tester.WithInitialValue(FollowsStrongGuarantee{}).Test());
-}
-
-struct HasReset : public NonNegative {
-  void operator()() {
-    i = -1;
-    ThrowingValue<> bomb;
-    i = 1;
-  }
-
-  void reset() { i = 0; }
-};
-
-testing::AssertionResult CheckHasResetContracts(HasReset* h) {
-  h->reset();
-  return testing::AssertionResult(h->i == 0);
-}
-
-TEST(ExceptionCheckTest, ModifyingChecker) {
-  auto set_to_1000 = [](FollowsBasicGuarantee* g) {
-    g->i = 1000;
-    return testing::AssertionSuccess();
-  };
-  auto is_1000 = [](FollowsBasicGuarantee* g) {
-    return testing::AssertionResult(g->i == 1000);
-  };
-  auto increment = [](FollowsStrongGuarantee* g) {
-    ++g->i;
-    return testing::AssertionSuccess();
-  };
-
-  EXPECT_FALSE(tester.WithInitialValue(FollowsBasicGuarantee{})
-                   .WithContracts(set_to_1000, is_1000)
-                   .Test());
-  EXPECT_TRUE(strong_tester.WithInitialValue(FollowsStrongGuarantee{})
-                  .WithContracts(increment)
-                  .Test());
-  EXPECT_TRUE(testing::MakeExceptionSafetyTester()
-                  .WithInitialValue(HasReset{})
-                  .WithContracts(CheckHasResetContracts)
-                  .Test(invoker));
-}
-
-TEST(ExceptionSafetyTesterTest, ResetsCountdown) {
-  auto test =
-      testing::MakeExceptionSafetyTester()
-          .WithInitialValue(ThrowingValue<>())
-          .WithContracts([](ThrowingValue<>*) { return AssertionSuccess(); })
-          .WithOperation([](ThrowingValue<>*) {});
-  ASSERT_TRUE(test.Test());
-  // If the countdown isn't reset because there were no exceptions thrown, then
-  // this will fail with a termination from an unhandled exception
-  EXPECT_TRUE(test.Test());
-}
-
-struct NonCopyable : public NonNegative {
-  NonCopyable(const NonCopyable&) = delete;
-  NonCopyable() : NonNegative{0} {}
-
-  void operator()() { ThrowingValue<> bomb; }
-};
-
-TEST(ExceptionCheckTest, NonCopyable) {
-  auto factory = []() { return absl::make_unique<NonCopyable>(); };
-  EXPECT_TRUE(tester.WithFactory(factory).Test());
-  EXPECT_TRUE(strong_tester.WithFactory(factory).Test());
-}
-
-struct NonEqualityComparable : public NonNegative {
-  void operator()() { ThrowingValue<> bomb; }
-
-  void ModifyOnThrow() {
-    ++i;
-    ThrowingValue<> bomb;
-    static_cast<void>(bomb);
-    --i;
-  }
-};
-
-TEST(ExceptionCheckTest, NonEqualityComparable) {
-  auto nec_is_strong = [](NonEqualityComparable* nec) {
-    return testing::AssertionResult(nec->i == NonEqualityComparable().i);
-  };
-  auto strong_nec_tester = tester.WithInitialValue(NonEqualityComparable{})
-                               .WithContracts(nec_is_strong);
-
-  EXPECT_TRUE(strong_nec_tester.Test());
-  EXPECT_FALSE(strong_nec_tester.Test(
-      [](NonEqualityComparable* n) { n->ModifyOnThrow(); }));
-}
-
-template <typename T>
-struct ExhaustivenessTester {
-  void operator()() {
-    successes |= 1;
-    T b1;
-    static_cast<void>(b1);
-    successes |= (1 << 1);
-    T b2;
-    static_cast<void>(b2);
-    successes |= (1 << 2);
-    T b3;
-    static_cast<void>(b3);
-    successes |= (1 << 3);
-  }
-
-  bool operator==(const ExhaustivenessTester<ThrowingValue<>>&) const {
-    return true;
-  }
-
-  static unsigned char successes;
-};
-
-struct {
-  template <typename T>
-  testing::AssertionResult operator()(ExhaustivenessTester<T>*) const {
-    return testing::AssertionSuccess();
-  }
-} CheckExhaustivenessTesterContracts;
-
-template <typename T>
-unsigned char ExhaustivenessTester<T>::successes = 0;
-
-TEST(ExceptionCheckTest, Exhaustiveness) {
-  auto exhaust_tester = testing::MakeExceptionSafetyTester()
-                            .WithContracts(CheckExhaustivenessTesterContracts)
-                            .WithOperation(invoker);
-
-  EXPECT_TRUE(
-      exhaust_tester.WithInitialValue(ExhaustivenessTester<int>{}).Test());
-  EXPECT_EQ(ExhaustivenessTester<int>::successes, 0xF);
-
-  EXPECT_TRUE(
-      exhaust_tester.WithInitialValue(ExhaustivenessTester<ThrowingValue<>>{})
-          .WithContracts(testing::strong_guarantee)
-          .Test());
-  EXPECT_EQ(ExhaustivenessTester<ThrowingValue<>>::successes, 0xF);
-}
-
-struct LeaksIfCtorThrows : private exceptions_internal::TrackedObject {
-  LeaksIfCtorThrows() : TrackedObject(ABSL_PRETTY_FUNCTION) {
-    ++counter;
-    ThrowingValue<> v;
-    static_cast<void>(v);
-    --counter;
-  }
-  LeaksIfCtorThrows(const LeaksIfCtorThrows&) noexcept
-      : TrackedObject(ABSL_PRETTY_FUNCTION) {}
-  static int counter;
-};
-int LeaksIfCtorThrows::counter = 0;
-
-TEST(ExceptionCheckTest, TestLeakyCtor) {
-  testing::TestThrowingCtor<LeaksIfCtorThrows>();
-  EXPECT_EQ(LeaksIfCtorThrows::counter, 1);
-  LeaksIfCtorThrows::counter = 0;
-}
-
-struct Tracked : private exceptions_internal::TrackedObject {
-  Tracked() : TrackedObject(ABSL_PRETTY_FUNCTION) {}
-};
-
-TEST(ConstructorTrackerTest, CreatedBefore) {
-  Tracked a, b, c;
-  exceptions_internal::ConstructorTracker ct(exceptions_internal::countdown);
-}
-
-TEST(ConstructorTrackerTest, CreatedAfter) {
-  exceptions_internal::ConstructorTracker ct(exceptions_internal::countdown);
-  Tracked a, b, c;
-}
-
-TEST(ConstructorTrackerTest, NotDestroyedAfter) {
-  alignas(Tracked) unsigned char storage[sizeof(Tracked)];
-  EXPECT_NONFATAL_FAILURE(
-      {
-        exceptions_internal::ConstructorTracker ct(
-            exceptions_internal::countdown);
-        new (&storage) Tracked();
-      },
-      "not destroyed");
-}
-
-TEST(ConstructorTrackerTest, DestroyedTwice) {
-  exceptions_internal::ConstructorTracker ct(exceptions_internal::countdown);
-  EXPECT_NONFATAL_FAILURE(
-      {
-        Tracked t;
-        t.~Tracked();
-      },
-      "re-destroyed");
-}
-
-TEST(ConstructorTrackerTest, ConstructedTwice) {
-  exceptions_internal::ConstructorTracker ct(exceptions_internal::countdown);
-  alignas(Tracked) unsigned char storage[sizeof(Tracked)];
-  EXPECT_NONFATAL_FAILURE(
-      {
-        new (&storage) Tracked();
-        new (&storage) Tracked();
-        reinterpret_cast<Tracked*>(&storage)->~Tracked();
-      },
-      "re-constructed");
-}
-
-TEST(ThrowingValueTraitsTest, RelationalOperators) {
-  ThrowingValue<> a, b;
-  EXPECT_TRUE((std::is_convertible<decltype(a == b), bool>::value));
-  EXPECT_TRUE((std::is_convertible<decltype(a != b), bool>::value));
-  EXPECT_TRUE((std::is_convertible<decltype(a < b), bool>::value));
-  EXPECT_TRUE((std::is_convertible<decltype(a <= b), bool>::value));
-  EXPECT_TRUE((std::is_convertible<decltype(a > b), bool>::value));
-  EXPECT_TRUE((std::is_convertible<decltype(a >= b), bool>::value));
-}
-
-TEST(ThrowingAllocatorTraitsTest, Assignablility) {
-  EXPECT_TRUE(absl::is_move_assignable<ThrowingAllocator<int>>::value);
-  EXPECT_TRUE(absl::is_copy_assignable<ThrowingAllocator<int>>::value);
-  EXPECT_TRUE(std::is_nothrow_move_assignable<ThrowingAllocator<int>>::value);
-  EXPECT_TRUE(std::is_nothrow_copy_assignable<ThrowingAllocator<int>>::value);
-}
-
-}  // namespace
-
-}  // namespace testing
-
-#endif  // ABSL_HAVE_EXCEPTIONS
diff --git a/third_party/abseil/absl/base/inline_variable_test.cc b/third_party/abseil/absl/base/inline_variable_test.cc
deleted file mode 100644
index 37a40e1..0000000
--- a/third_party/abseil/absl/base/inline_variable_test.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <type_traits>
-
-#include "absl/base/internal/inline_variable.h"
-#include "absl/base/internal/inline_variable_testing.h"
-
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace inline_variable_testing_internal {
-namespace {
-
-TEST(InlineVariableTest, Constexpr) {
-  static_assert(inline_variable_foo.value == 5, "");
-  static_assert(other_inline_variable_foo.value == 5, "");
-  static_assert(inline_variable_int == 5, "");
-  static_assert(other_inline_variable_int == 5, "");
-}
-
-TEST(InlineVariableTest, DefaultConstructedIdentityEquality) {
-  EXPECT_EQ(get_foo_a().value, 5);
-  EXPECT_EQ(get_foo_b().value, 5);
-  EXPECT_EQ(&get_foo_a(), &get_foo_b());
-}
-
-TEST(InlineVariableTest, DefaultConstructedIdentityInequality) {
-  EXPECT_NE(&inline_variable_foo, &other_inline_variable_foo);
-}
-
-TEST(InlineVariableTest, InitializedIdentityEquality) {
-  EXPECT_EQ(get_int_a(), 5);
-  EXPECT_EQ(get_int_b(), 5);
-  EXPECT_EQ(&get_int_a(), &get_int_b());
-}
-
-TEST(InlineVariableTest, InitializedIdentityInequality) {
-  EXPECT_NE(&inline_variable_int, &other_inline_variable_int);
-}
-
-TEST(InlineVariableTest, FunPtrType) {
-  static_assert(
-      std::is_same<void(*)(),
-                   std::decay<decltype(inline_variable_fun_ptr)>::type>::value,
-      "");
-}
-
-}  // namespace
-}  // namespace inline_variable_testing_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/inline_variable_test_a.cc b/third_party/abseil/absl/base/inline_variable_test_a.cc
deleted file mode 100644
index f96a58d..0000000
--- a/third_party/abseil/absl/base/inline_variable_test_a.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/inline_variable_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace inline_variable_testing_internal {
-
-const Foo& get_foo_a() { return inline_variable_foo; }
-
-const int& get_int_a() { return inline_variable_int; }
-
-}  // namespace inline_variable_testing_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/inline_variable_test_b.cc b/third_party/abseil/absl/base/inline_variable_test_b.cc
deleted file mode 100644
index 038adc3..0000000
--- a/third_party/abseil/absl/base/inline_variable_test_b.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/inline_variable_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace inline_variable_testing_internal {
-
-const Foo& get_foo_b() { return inline_variable_foo; }
-
-const int& get_int_b() { return inline_variable_int; }
-
-}  // namespace inline_variable_testing_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/atomic_hook.h b/third_party/abseil/absl/base/internal/atomic_hook.h
deleted file mode 100644
index ae21cd7..0000000
--- a/third_party/abseil/absl/base/internal/atomic_hook.h
+++ /dev/null
@@ -1,200 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_ATOMIC_HOOK_H_
-#define ABSL_BASE_INTERNAL_ATOMIC_HOOK_H_
-
-#include <atomic>
-#include <cassert>
-#include <cstdint>
-#include <utility>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-
-#if defined(_MSC_VER) && !defined(__clang__)
-#define ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT 0
-#else
-#define ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT 1
-#endif
-
-#if defined(_MSC_VER)
-#define ABSL_HAVE_WORKING_ATOMIC_POINTER 0
-#else
-#define ABSL_HAVE_WORKING_ATOMIC_POINTER 1
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-template <typename T>
-class AtomicHook;
-
-// To workaround AtomicHook not being constant-initializable on some platforms,
-// prefer to annotate instances with `ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES`
-// instead of `ABSL_CONST_INIT`.
-#if ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT
-#define ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_CONST_INIT
-#else
-#define ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-#endif
-
-// `AtomicHook` is a helper class, templatized on a raw function pointer type,
-// for implementing Abseil customization hooks.  It is a callable object that
-// dispatches to the registered hook.  Objects of type `AtomicHook` must have
-// static or thread storage duration.
-//
-// A default constructed object performs a no-op (and returns a default
-// constructed object) if no hook has been registered.
-//
-// Hooks can be pre-registered via constant initialization, for example:
-//
-// ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static AtomicHook<void(*)()>
-//     my_hook(DefaultAction);
-//
-// and then changed at runtime via a call to `Store()`.
-//
-// Reads and writes guarantee memory_order_acquire/memory_order_release
-// semantics.
-template <typename ReturnType, typename... Args>
-class AtomicHook<ReturnType (*)(Args...)> {
- public:
-  using FnPtr = ReturnType (*)(Args...);
-
-  // Constructs an object that by default performs a no-op (and
-  // returns a default constructed object) when no hook as been registered.
-  constexpr AtomicHook() : AtomicHook(DummyFunction) {}
-
-  // Constructs an object that by default dispatches to/returns the
-  // pre-registered default_fn when no hook has been registered at runtime.
-#if ABSL_HAVE_WORKING_ATOMIC_POINTER && ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT
-  explicit constexpr AtomicHook(FnPtr default_fn)
-      : hook_(default_fn), default_fn_(default_fn) {}
-#elif ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT
-  explicit constexpr AtomicHook(FnPtr default_fn)
-      : hook_(kUninitialized), default_fn_(default_fn) {}
-#else
-  // As of January 2020, on all known versions of MSVC this constructor runs in
-  // the global constructor sequence.  If `Store()` is called by a dynamic
-  // initializer, we want to preserve the value, even if this constructor runs
-  // after the call to `Store()`.  If not, `hook_` will be
-  // zero-initialized by the linker and we have no need to set it.
-  // https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html
-  explicit constexpr AtomicHook(FnPtr default_fn)
-      : /* hook_(deliberately omitted), */ default_fn_(default_fn) {
-    static_assert(kUninitialized == 0, "here we rely on zero-initialization");
-  }
-#endif
-
-  // Stores the provided function pointer as the value for this hook.
-  //
-  // This is intended to be called once.  Multiple calls are legal only if the
-  // same function pointer is provided for each call.  The store is implemented
-  // as a memory_order_release operation, and read accesses are implemented as
-  // memory_order_acquire.
-  void Store(FnPtr fn) {
-    bool success = DoStore(fn);
-    static_cast<void>(success);
-    assert(success);
-  }
-
-  // Invokes the registered callback.  If no callback has yet been registered, a
-  // default-constructed object of the appropriate type is returned instead.
-  template <typename... CallArgs>
-  ReturnType operator()(CallArgs&&... args) const {
-    return DoLoad()(std::forward<CallArgs>(args)...);
-  }
-
-  // Returns the registered callback, or nullptr if none has been registered.
-  // Useful if client code needs to conditionalize behavior based on whether a
-  // callback was registered.
-  //
-  // Note that atomic_hook.Load()() and atomic_hook() have different semantics:
-  // operator()() will perform a no-op if no callback was registered, while
-  // Load()() will dereference a null function pointer.  Prefer operator()() to
-  // Load()() unless you must conditionalize behavior on whether a hook was
-  // registered.
-  FnPtr Load() const {
-    FnPtr ptr = DoLoad();
-    return (ptr == DummyFunction) ? nullptr : ptr;
-  }
-
- private:
-  static ReturnType DummyFunction(Args...) {
-    return ReturnType();
-  }
-
-  // Current versions of MSVC (as of September 2017) have a broken
-  // implementation of std::atomic<T*>:  Its constructor attempts to do the
-  // equivalent of a reinterpret_cast in a constexpr context, which is not
-  // allowed.
-  //
-  // This causes an issue when building with LLVM under Windows.  To avoid this,
-  // we use a less-efficient, intptr_t-based implementation on Windows.
-#if ABSL_HAVE_WORKING_ATOMIC_POINTER
-  // Return the stored value, or DummyFunction if no value has been stored.
-  FnPtr DoLoad() const { return hook_.load(std::memory_order_acquire); }
-
-  // Store the given value.  Returns false if a different value was already
-  // stored to this object.
-  bool DoStore(FnPtr fn) {
-    assert(fn);
-    FnPtr expected = default_fn_;
-    const bool store_succeeded = hook_.compare_exchange_strong(
-        expected, fn, std::memory_order_acq_rel, std::memory_order_acquire);
-    const bool same_value_already_stored = (expected == fn);
-    return store_succeeded || same_value_already_stored;
-  }
-
-  std::atomic<FnPtr> hook_;
-#else  // !ABSL_HAVE_WORKING_ATOMIC_POINTER
-  // Use a sentinel value unlikely to be the address of an actual function.
-  static constexpr intptr_t kUninitialized = 0;
-
-  static_assert(sizeof(intptr_t) >= sizeof(FnPtr),
-                "intptr_t can't contain a function pointer");
-
-  FnPtr DoLoad() const {
-    const intptr_t value = hook_.load(std::memory_order_acquire);
-    if (value == kUninitialized) {
-      return default_fn_;
-    }
-    return reinterpret_cast<FnPtr>(value);
-  }
-
-  bool DoStore(FnPtr fn) {
-    assert(fn);
-    const auto value = reinterpret_cast<intptr_t>(fn);
-    intptr_t expected = kUninitialized;
-    const bool store_succeeded = hook_.compare_exchange_strong(
-        expected, value, std::memory_order_acq_rel, std::memory_order_acquire);
-    const bool same_value_already_stored = (expected == value);
-    return store_succeeded || same_value_already_stored;
-  }
-
-  std::atomic<intptr_t> hook_;
-#endif
-
-  const FnPtr default_fn_;
-};
-
-#undef ABSL_HAVE_WORKING_ATOMIC_POINTER
-#undef ABSL_HAVE_WORKING_CONSTEXPR_STATIC_INIT
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_ATOMIC_HOOK_H_
diff --git a/third_party/abseil/absl/base/internal/atomic_hook_test.cc b/third_party/abseil/absl/base/internal/atomic_hook_test.cc
deleted file mode 100644
index e577a8f..0000000
--- a/third_party/abseil/absl/base/internal/atomic_hook_test.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/atomic_hook.h"
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/internal/atomic_hook_test_helper.h"
-
-namespace {
-
-using ::testing::Eq;
-
-int value = 0;
-void TestHook(int x) { value = x; }
-
-TEST(AtomicHookTest, NoDefaultFunction) {
-  ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook<
-      void (*)(int)>
-      hook;
-  value = 0;
-
-  // Test the default DummyFunction.
-  EXPECT_TRUE(hook.Load() == nullptr);
-  EXPECT_EQ(value, 0);
-  hook(1);
-  EXPECT_EQ(value, 0);
-
-  // Test a stored hook.
-  hook.Store(TestHook);
-  EXPECT_TRUE(hook.Load() == TestHook);
-  EXPECT_EQ(value, 0);
-  hook(1);
-  EXPECT_EQ(value, 1);
-
-  // Calling Store() with the same hook should not crash.
-  hook.Store(TestHook);
-  EXPECT_TRUE(hook.Load() == TestHook);
-  EXPECT_EQ(value, 1);
-  hook(2);
-  EXPECT_EQ(value, 2);
-}
-
-TEST(AtomicHookTest, WithDefaultFunction) {
-  // Set the default value to TestHook at compile-time.
-  ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook<
-      void (*)(int)>
-      hook(TestHook);
-  value = 0;
-
-  // Test the default value is TestHook.
-  EXPECT_TRUE(hook.Load() == TestHook);
-  EXPECT_EQ(value, 0);
-  hook(1);
-  EXPECT_EQ(value, 1);
-
-  // Calling Store() with the same hook should not crash.
-  hook.Store(TestHook);
-  EXPECT_TRUE(hook.Load() == TestHook);
-  EXPECT_EQ(value, 1);
-  hook(2);
-  EXPECT_EQ(value, 2);
-}
-
-ABSL_CONST_INIT int override_func_calls = 0;
-void OverrideFunc() { override_func_calls++; }
-static struct OverrideInstaller {
-  OverrideInstaller() { absl::atomic_hook_internal::func.Store(OverrideFunc); }
-} override_installer;
-
-TEST(AtomicHookTest, DynamicInitFromAnotherTU) {
-  // MSVC 14.2 doesn't do constexpr static init correctly; in particular it
-  // tends to sequence static init (i.e. defaults) of `AtomicHook` objects
-  // after their dynamic init (i.e. overrides), overwriting whatever value was
-  // written during dynamic init.  This regression test validates the fix.
-  // https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html
-  EXPECT_THAT(absl::atomic_hook_internal::default_func_calls, Eq(0));
-  EXPECT_THAT(override_func_calls, Eq(0));
-  absl::atomic_hook_internal::func();
-  EXPECT_THAT(absl::atomic_hook_internal::default_func_calls, Eq(0));
-  EXPECT_THAT(override_func_calls, Eq(1));
-  EXPECT_THAT(absl::atomic_hook_internal::func.Load(), Eq(OverrideFunc));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/atomic_hook_test_helper.cc b/third_party/abseil/absl/base/internal/atomic_hook_test_helper.cc
deleted file mode 100644
index 537d47c..0000000
--- a/third_party/abseil/absl/base/internal/atomic_hook_test_helper.cc
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/atomic_hook_test_helper.h"
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/atomic_hook.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace atomic_hook_internal {
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES absl::base_internal::AtomicHook<VoidF>
-    func(DefaultFunc);
-ABSL_CONST_INIT int default_func_calls = 0;
-void DefaultFunc() { default_func_calls++; }
-void RegisterFunc(VoidF f) { func.Store(f); }
-
-}  // namespace atomic_hook_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/atomic_hook_test_helper.h b/third_party/abseil/absl/base/internal/atomic_hook_test_helper.h
deleted file mode 100644
index 3e72b49..0000000
--- a/third_party/abseil/absl/base/internal/atomic_hook_test_helper.h
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
-#define ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
-
-#include "absl/base/internal/atomic_hook.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace atomic_hook_internal {
-
-using VoidF = void (*)();
-extern absl::base_internal::AtomicHook<VoidF> func;
-extern int default_func_calls;
-void DefaultFunc();
-void RegisterFunc(VoidF func);
-
-}  // namespace atomic_hook_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_ATOMIC_HOOK_TEST_HELPER_H_
diff --git a/third_party/abseil/absl/base/internal/cmake_thread_test.cc b/third_party/abseil/absl/base/internal/cmake_thread_test.cc
deleted file mode 100644
index f70bb24..0000000
--- a/third_party/abseil/absl/base/internal/cmake_thread_test.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <iostream>
-#include "absl/base/internal/thread_identity.h"
-
-int main() {
-  auto* tid = absl::base_internal::CurrentThreadIdentityIfPresent();
-  // Make sure the above call can't be optimized out
-  std::cout << (void*)tid << std::endl;
-}
diff --git a/third_party/abseil/absl/base/internal/cycleclock.cc b/third_party/abseil/absl/base/internal/cycleclock.cc
deleted file mode 100644
index 0e65005..0000000
--- a/third_party/abseil/absl/base/internal/cycleclock.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// The implementation of CycleClock::Frequency.
-//
-// NOTE: only i386 and x86_64 have been well tested.
-// PPC, sparc, alpha, and ia64 are based on
-//    http://peter.kuscsik.com/wordpress/?p=14
-// with modifications by m3b.  See also
-//    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
-
-#include "absl/base/internal/cycleclock.h"
-
-#include <atomic>
-#include <chrono>  // NOLINT(build/c++11)
-
-#include "absl/base/internal/unscaledcycleclock.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-#if ABSL_USE_UNSCALED_CYCLECLOCK
-
-namespace {
-
-#ifdef NDEBUG
-#ifdef ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
-// Not debug mode and the UnscaledCycleClock frequency is the CPU
-// frequency.  Scale the CycleClock to prevent overflow if someone
-// tries to represent the time as cycles since the Unix epoch.
-static constexpr int32_t kShift = 1;
-#else
-// Not debug mode and the UnscaledCycleClock isn't operating at the
-// raw CPU frequency. There is no need to do any scaling, so don't
-// needlessly sacrifice precision.
-static constexpr int32_t kShift = 0;
-#endif
-#else
-// In debug mode use a different shift to discourage depending on a
-// particular shift value.
-static constexpr int32_t kShift = 2;
-#endif
-
-static constexpr double kFrequencyScale = 1.0 / (1 << kShift);
-static std::atomic<CycleClockSourceFunc> cycle_clock_source;
-
-CycleClockSourceFunc LoadCycleClockSource() {
-  // Optimize for the common case (no callback) by first doing a relaxed load;
-  // this is significantly faster on non-x86 platforms.
-  if (cycle_clock_source.load(std::memory_order_relaxed) == nullptr) {
-    return nullptr;
-  }
-  // This corresponds to the store(std::memory_order_release) in
-  // CycleClockSource::Register, and makes sure that any updates made prior to
-  // registering the callback are visible to this thread before the callback is
-  // invoked.
-  return cycle_clock_source.load(std::memory_order_acquire);
-}
-
-}  // namespace
-
-int64_t CycleClock::Now() {
-  auto fn = LoadCycleClockSource();
-  if (fn == nullptr) {
-    return base_internal::UnscaledCycleClock::Now() >> kShift;
-  }
-  return fn() >> kShift;
-}
-
-double CycleClock::Frequency() {
-  return kFrequencyScale * base_internal::UnscaledCycleClock::Frequency();
-}
-
-void CycleClockSource::Register(CycleClockSourceFunc source) {
-  // Corresponds to the load(std::memory_order_acquire) in LoadCycleClockSource.
-  cycle_clock_source.store(source, std::memory_order_release);
-}
-
-#else
-
-int64_t CycleClock::Now() {
-  return std::chrono::duration_cast<std::chrono::nanoseconds>(
-             std::chrono::steady_clock::now().time_since_epoch())
-      .count();
-}
-
-double CycleClock::Frequency() {
-  return 1e9;
-}
-
-#endif
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/cycleclock.h b/third_party/abseil/absl/base/internal/cycleclock.h
deleted file mode 100644
index a18b584..0000000
--- a/third_party/abseil/absl/base/internal/cycleclock.h
+++ /dev/null
@@ -1,94 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// -----------------------------------------------------------------------------
-// File: cycleclock.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines a `CycleClock`, which yields the value and frequency
-// of a cycle counter that increments at a rate that is approximately constant.
-//
-// NOTE:
-//
-// The cycle counter frequency is not necessarily related to the core clock
-// frequency and should not be treated as such. That is, `CycleClock` cycles are
-// not necessarily "CPU cycles" and code should not rely on that behavior, even
-// if experimentally observed.
-//
-// An arbitrary offset may have been added to the counter at power on.
-//
-// On some platforms, the rate and offset of the counter may differ
-// slightly when read from different CPUs of a multiprocessor. Usually,
-// we try to ensure that the operating system adjusts values periodically
-// so that values agree approximately.   If you need stronger guarantees,
-// consider using alternate interfaces.
-//
-// The CPU is not required to maintain the ordering of a cycle counter read
-// with respect to surrounding instructions.
-
-#ifndef ABSL_BASE_INTERNAL_CYCLECLOCK_H_
-#define ABSL_BASE_INTERNAL_CYCLECLOCK_H_
-
-#include <cstdint>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// -----------------------------------------------------------------------------
-// CycleClock
-// -----------------------------------------------------------------------------
-class CycleClock {
- public:
-  // CycleClock::Now()
-  //
-  // Returns the value of a cycle counter that counts at a rate that is
-  // approximately constant.
-  static int64_t Now();
-
-  // CycleClock::Frequency()
-  //
-  // Returns the amount by which `CycleClock::Now()` increases per second. Note
-  // that this value may not necessarily match the core CPU clock frequency.
-  static double Frequency();
-
- private:
-  CycleClock() = delete;  // no instances
-  CycleClock(const CycleClock&) = delete;
-  CycleClock& operator=(const CycleClock&) = delete;
-};
-
-using CycleClockSourceFunc = int64_t (*)();
-
-class CycleClockSource {
- private:
-  // CycleClockSource::Register()
-  //
-  // Register a function that provides an alternate source for the unscaled CPU
-  // cycle count value. The source function must be async signal safe, must not
-  // call CycleClock::Now(), and must have a frequency that matches that of the
-  // unscaled clock used by CycleClock. A nullptr value resets CycleClock to use
-  // the default source.
-  static void Register(CycleClockSourceFunc source);
-};
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_CYCLECLOCK_H_
diff --git a/third_party/abseil/absl/base/internal/direct_mmap.h b/third_party/abseil/absl/base/internal/direct_mmap.h
deleted file mode 100644
index 16accf0..0000000
--- a/third_party/abseil/absl/base/internal/direct_mmap.h
+++ /dev/null
@@ -1,166 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Functions for directly invoking mmap() via syscall, avoiding the case where
-// mmap() has been locally overridden.
-
-#ifndef ABSL_BASE_INTERNAL_DIRECT_MMAP_H_
-#define ABSL_BASE_INTERNAL_DIRECT_MMAP_H_
-
-#include "absl/base/config.h"
-
-#if ABSL_HAVE_MMAP
-
-#include <sys/mman.h>
-
-#ifdef __linux__
-
-#include <sys/types.h>
-#ifdef __BIONIC__
-#include <sys/syscall.h>
-#else
-#include <syscall.h>
-#endif
-
-#include <linux/unistd.h>
-#include <unistd.h>
-#include <cerrno>
-#include <cstdarg>
-#include <cstdint>
-
-#ifdef __mips__
-// Include definitions of the ABI currently in use.
-#ifdef __BIONIC__
-// Android doesn't have sgidefs.h, but does have asm/sgidefs.h, which has the
-// definitions we need.
-#include <asm/sgidefs.h>
-#else
-#include <sgidefs.h>
-#endif  // __BIONIC__
-#endif  // __mips__
-
-// SYS_mmap and SYS_munmap are not defined in Android.
-#ifdef __BIONIC__
-extern "C" void* __mmap2(void*, size_t, int, int, int, size_t);
-#if defined(__NR_mmap) && !defined(SYS_mmap)
-#define SYS_mmap __NR_mmap
-#endif
-#ifndef SYS_munmap
-#define SYS_munmap __NR_munmap
-#endif
-#endif  // __BIONIC__
-
-#if defined(__NR_mmap2) && !defined(SYS_mmap2)
-#define SYS_mmap2 __NR_mmap2
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// Platform specific logic extracted from
-// https://chromium.googlesource.com/linux-syscall-support/+/master/linux_syscall_support.h
-inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd,
-                        off64_t offset) noexcept {
-#if defined(__i386__) || defined(__ARM_ARCH_3__) || defined(__ARM_EABI__) || \
-    (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32) ||                   \
-    (defined(__PPC__) && !defined(__PPC64__)) ||                             \
-    (defined(__riscv) && __riscv_xlen == 32) ||                              \
-    (defined(__s390__) && !defined(__s390x__))
-  // On these architectures, implement mmap with mmap2.
-  static int pagesize = 0;
-  if (pagesize == 0) {
-#if defined(__wasm__) || defined(__asmjs__)
-    pagesize = getpagesize();
-#else
-    pagesize = sysconf(_SC_PAGESIZE);
-#endif
-  }
-  if (offset < 0 || offset % pagesize != 0) {
-    errno = EINVAL;
-    return MAP_FAILED;
-  }
-#ifdef __BIONIC__
-  // SYS_mmap2 has problems on Android API level <= 16.
-  // Workaround by invoking __mmap2() instead.
-  return __mmap2(start, length, prot, flags, fd, offset / pagesize);
-#else
-  return reinterpret_cast<void*>(
-      syscall(SYS_mmap2, start, length, prot, flags, fd,
-              static_cast<off_t>(offset / pagesize)));
-#endif
-#elif defined(__s390x__)
-  // On s390x, mmap() arguments are passed in memory.
-  unsigned long buf[6] = {reinterpret_cast<unsigned long>(start),  // NOLINT
-                          static_cast<unsigned long>(length),      // NOLINT
-                          static_cast<unsigned long>(prot),        // NOLINT
-                          static_cast<unsigned long>(flags),       // NOLINT
-                          static_cast<unsigned long>(fd),          // NOLINT
-                          static_cast<unsigned long>(offset)};     // NOLINT
-  return reinterpret_cast<void*>(syscall(SYS_mmap, buf));
-#elif defined(__x86_64__)
-// The x32 ABI has 32 bit longs, but the syscall interface is 64 bit.
-// We need to explicitly cast to an unsigned 64 bit type to avoid implicit
-// sign extension.  We can't cast pointers directly because those are
-// 32 bits, and gcc will dump ugly warnings about casting from a pointer
-// to an integer of a different size. We also need to make sure __off64_t
-// isn't truncated to 32-bits under x32.
-#define MMAP_SYSCALL_ARG(x) ((uint64_t)(uintptr_t)(x))
-  return reinterpret_cast<void*>(
-      syscall(SYS_mmap, MMAP_SYSCALL_ARG(start), MMAP_SYSCALL_ARG(length),
-              MMAP_SYSCALL_ARG(prot), MMAP_SYSCALL_ARG(flags),
-              MMAP_SYSCALL_ARG(fd), static_cast<uint64_t>(offset)));
-#undef MMAP_SYSCALL_ARG
-#else  // Remaining 64-bit aritectures.
-  static_assert(sizeof(unsigned long) == 8, "Platform is not 64-bit");
-  return reinterpret_cast<void*>(
-      syscall(SYS_mmap, start, length, prot, flags, fd, offset));
-#endif
-}
-
-inline int DirectMunmap(void* start, size_t length) {
-  return static_cast<int>(syscall(SYS_munmap, start, length));
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // !__linux__
-
-// For non-linux platforms where we have mmap, just dispatch directly to the
-// actual mmap()/munmap() methods.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-inline void* DirectMmap(void* start, size_t length, int prot, int flags, int fd,
-                        off_t offset) {
-  return mmap(start, length, prot, flags, fd, offset);
-}
-
-inline int DirectMunmap(void* start, size_t length) {
-  return munmap(start, length);
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // __linux__
-
-#endif  // ABSL_HAVE_MMAP
-
-#endif  // ABSL_BASE_INTERNAL_DIRECT_MMAP_H_
diff --git a/third_party/abseil/absl/base/internal/dynamic_annotations.h b/third_party/abseil/absl/base/internal/dynamic_annotations.h
deleted file mode 100644
index b23c5ec..0000000
--- a/third_party/abseil/absl/base/internal/dynamic_annotations.h
+++ /dev/null
@@ -1,398 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file defines dynamic annotations for use with dynamic analysis tool
-// such as valgrind, PIN, etc.
-//
-// Dynamic annotation is a source code annotation that affects the generated
-// code (that is, the annotation is not a comment). Each such annotation is
-// attached to a particular instruction and/or to a particular object (address)
-// in the program.
-//
-// The annotations that should be used by users are macros in all upper-case
-// (e.g., ANNOTATE_THREAD_NAME).
-//
-// Actual implementation of these macros may differ depending on the dynamic
-// analysis tool being used.
-//
-// This file supports the following configurations:
-// - Dynamic Annotations enabled (with static thread-safety warnings disabled).
-//   In this case, macros expand to functions implemented by Thread Sanitizer,
-//   when building with TSan. When not provided an external implementation,
-//   dynamic_annotations.cc provides no-op implementations.
-//
-// - Static Clang thread-safety warnings enabled.
-//   When building with a Clang compiler that supports thread-safety warnings,
-//   a subset of annotations can be statically-checked at compile-time. We
-//   expand these macros to static-inline functions that can be analyzed for
-//   thread-safety, but afterwards elided when building the final binary.
-//
-// - All annotations are disabled.
-//   If neither Dynamic Annotations nor Clang thread-safety warnings are
-//   enabled, then all annotation-macros expand to empty.
-
-#ifndef ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_
-#define ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_
-
-#include <stddef.h>
-
-#include "absl/base/config.h"
-
-// -------------------------------------------------------------------------
-// Decide which features are enabled
-
-#ifndef DYNAMIC_ANNOTATIONS_ENABLED
-#define DYNAMIC_ANNOTATIONS_ENABLED 0
-#endif
-
-#if defined(__clang__) && !defined(SWIG)
-#define ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED 1
-#endif
-
-#if DYNAMIC_ANNOTATIONS_ENABLED != 0
-
-#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 1
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED 0
-#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED 1
-
-#else
-
-#define ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED 0
-#define ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED 0
-#define ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED 0
-
-// Clang provides limited support for static thread-safety analysis through a
-// feature called Annotalysis. We configure macro-definitions according to
-// whether Annotalysis support is available. When running in opt-mode, GCC
-// will issue a warning, if these attributes are compiled. Only include them
-// when compiling using Clang.
-
-// ANNOTALYSIS_ENABLED == 1 when IGNORE_READ_ATTRIBUTE_ENABLED == 1
-#define ABSL_INTERNAL_ANNOTALYSIS_ENABLED \
-  defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-// Read/write annotations are enabled in Annotalysis mode; disabled otherwise.
-#define ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED \
-  ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-#endif
-
-// Memory annotations are also made available to LLVM's Memory Sanitizer
-#if defined(ABSL_HAVE_MEMORY_SANITIZER) && !defined(__native_client__)
-#define ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED 1
-#endif
-
-#ifndef ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED
-#define ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED 0
-#endif
-
-#ifdef __cplusplus
-#define ABSL_INTERNAL_BEGIN_EXTERN_C extern "C" {
-#define ABSL_INTERNAL_END_EXTERN_C }  // extern "C"
-#define ABSL_INTERNAL_GLOBAL_SCOPED(F) ::F
-#define ABSL_INTERNAL_STATIC_INLINE inline
-#else
-#define ABSL_INTERNAL_BEGIN_EXTERN_C  // empty
-#define ABSL_INTERNAL_END_EXTERN_C    // empty
-#define ABSL_INTERNAL_GLOBAL_SCOPED(F) F
-#define ABSL_INTERNAL_STATIC_INLINE static inline
-#endif
-
-// -------------------------------------------------------------------------
-// Define race annotations.
-
-#if ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 1
-
-// -------------------------------------------------------------
-// Annotations that suppress errors. It is usually better to express the
-// program's synchronization using the other annotations, but these can be used
-// when all else fails.
-
-// Report that we may have a benign race at `pointer`, with size
-// "sizeof(*(pointer))". `pointer` must be a non-void* pointer. Insert at the
-// point where `pointer` has been allocated, preferably close to the point
-// where the race happens. See also ANNOTATE_BENIGN_RACE_STATIC.
-#define ANNOTATE_BENIGN_RACE(pointer, description)     \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized) \
-  (__FILE__, __LINE__, pointer, sizeof(*(pointer)), description)
-
-// Same as ANNOTATE_BENIGN_RACE(`address`, `description`), but applies to
-// the memory range [`address`, `address`+`size`).
-#define ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateBenignRaceSized)         \
-  (__FILE__, __LINE__, address, size, description)
-
-// Enable (`enable`!=0) or disable (`enable`==0) race detection for all threads.
-// This annotation could be useful if you want to skip expensive race analysis
-// during some period of program execution, e.g. during initialization.
-#define ANNOTATE_ENABLE_RACE_DETECTION(enable)             \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateEnableRaceDetection) \
-  (__FILE__, __LINE__, enable)
-
-// -------------------------------------------------------------
-// Annotations useful for debugging.
-
-// Report the current thread `name` to a race detector.
-#define ANNOTATE_THREAD_NAME(name) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateThreadName)(__FILE__, __LINE__, name)
-
-// -------------------------------------------------------------
-// Annotations useful when implementing locks. They are not normally needed by
-// modules that merely use locks. The `lock` argument is a pointer to the lock
-// object.
-
-// Report that a lock has been created at address `lock`.
-#define ANNOTATE_RWLOCK_CREATE(lock) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreate)(__FILE__, __LINE__, lock)
-
-// Report that a linker initialized lock has been created at address `lock`.
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-#define ANNOTATE_RWLOCK_CREATE_STATIC(lock)               \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockCreateStatic) \
-  (__FILE__, __LINE__, lock)
-#else
-#define ANNOTATE_RWLOCK_CREATE_STATIC(lock) ANNOTATE_RWLOCK_CREATE(lock)
-#endif
-
-// Report that the lock at address `lock` is about to be destroyed.
-#define ANNOTATE_RWLOCK_DESTROY(lock) \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockDestroy)(__FILE__, __LINE__, lock)
-
-// Report that the lock at address `lock` has been acquired.
-// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
-#define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)          \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockAcquired) \
-  (__FILE__, __LINE__, lock, is_w)
-
-// Report that the lock at address `lock` is about to be released.
-// `is_w`=1 for writer lock, `is_w`=0 for reader lock.
-#define ANNOTATE_RWLOCK_RELEASED(lock, is_w)          \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateRWLockReleased) \
-  (__FILE__, __LINE__, lock, is_w)
-
-// Apply ANNOTATE_BENIGN_RACE_SIZED to a static variable `static_var`.
-#define ANNOTATE_BENIGN_RACE_STATIC(static_var, description)      \
-  namespace {                                                     \
-  class static_var##_annotator {                                  \
-   public:                                                        \
-    static_var##_annotator() {                                    \
-      ANNOTATE_BENIGN_RACE_SIZED(&static_var, sizeof(static_var), \
-                                 #static_var ": " description);   \
-    }                                                             \
-  };                                                              \
-  static static_var##_annotator the##static_var##_annotator;      \
-  }  // namespace
-
-#else  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED == 0
-
-#define ANNOTATE_RWLOCK_CREATE(lock)                            // empty
-#define ANNOTATE_RWLOCK_CREATE_STATIC(lock)                     // empty
-#define ANNOTATE_RWLOCK_DESTROY(lock)                           // empty
-#define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w)                    // empty
-#define ANNOTATE_RWLOCK_RELEASED(lock, is_w)                    // empty
-#define ANNOTATE_BENIGN_RACE(address, description)              // empty
-#define ANNOTATE_BENIGN_RACE_SIZED(address, size, description)  // empty
-#define ANNOTATE_THREAD_NAME(name)                              // empty
-#define ANNOTATE_ENABLE_RACE_DETECTION(enable)                  // empty
-#define ANNOTATE_BENIGN_RACE_STATIC(static_var, description)    // empty
-
-#endif  // ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
-
-// -------------------------------------------------------------------------
-// Define memory annotations.
-
-#if ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED == 1
-
-#include <sanitizer/msan_interface.h>
-
-#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
-  __msan_unpoison(address, size)
-
-#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
-  __msan_allocated_memory(address, size)
-
-#else  // ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED == 0
-
-#if DYNAMIC_ANNOTATIONS_ENABLED == 1
-#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size) \
-  do {                                                \
-    (void)(address);                                  \
-    (void)(size);                                     \
-  } while (0)
-#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size) \
-  do {                                                  \
-    (void)(address);                                    \
-    (void)(size);                                       \
-  } while (0)
-#else
-#define ANNOTATE_MEMORY_IS_INITIALIZED(address, size)    // empty
-#define ANNOTATE_MEMORY_IS_UNINITIALIZED(address, size)  // empty
-#endif
-
-#endif  // ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED
-
-// -------------------------------------------------------------------------
-// Define IGNORE_READS_BEGIN/_END attributes.
-
-#if defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE \
-  __attribute((exclusive_lock_function("*")))
-#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE \
-  __attribute((unlock_function("*")))
-
-#else  // !defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-#define ABSL_INTERNAL_IGNORE_READS_BEGIN_ATTRIBUTE  // empty
-#define ABSL_INTERNAL_IGNORE_READS_END_ATTRIBUTE    // empty
-
-#endif  // defined(ABSL_INTERNAL_IGNORE_READS_ATTRIBUTE_ENABLED)
-
-// -------------------------------------------------------------------------
-// Define IGNORE_READS_BEGIN/_END annotations.
-
-#if ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED == 1
-
-// Request the analysis tool to ignore all reads in the current thread until
-// ANNOTATE_IGNORE_READS_END is called. Useful to ignore intentional racey
-// reads, while still checking other reads and all writes.
-// See also ANNOTATE_UNPROTECTED_READ.
-#define ANNOTATE_IGNORE_READS_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsBegin)(__FILE__, __LINE__)
-
-// Stop ignoring reads.
-#define ANNOTATE_IGNORE_READS_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreReadsEnd)(__FILE__, __LINE__)
-
-#elif defined(ABSL_INTERNAL_ANNOTALYSIS_ENABLED)
-
-// When Annotalysis is enabled without Dynamic Annotations, the use of
-// static-inline functions allows the annotations to be read at compile-time,
-// while still letting the compiler elide the functions from the final build.
-//
-// TODO(delesley) -- The exclusive lock here ignores writes as well, but
-// allows IGNORE_READS_AND_WRITES to work properly.
-
-#define ANNOTATE_IGNORE_READS_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsBegin)()
-
-#define ANNOTATE_IGNORE_READS_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AbslInternalAnnotateIgnoreReadsEnd)()
-
-#else
-
-#define ANNOTATE_IGNORE_READS_BEGIN()  // empty
-#define ANNOTATE_IGNORE_READS_END()    // empty
-
-#endif
-
-// -------------------------------------------------------------------------
-// Define IGNORE_WRITES_BEGIN/_END annotations.
-
-#if ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED == 1
-
-// Similar to ANNOTATE_IGNORE_READS_BEGIN, but ignore writes instead.
-#define ANNOTATE_IGNORE_WRITES_BEGIN() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesBegin)(__FILE__, __LINE__)
-
-// Stop ignoring writes.
-#define ANNOTATE_IGNORE_WRITES_END() \
-  ABSL_INTERNAL_GLOBAL_SCOPED(AnnotateIgnoreWritesEnd)(__FILE__, __LINE__)
-
-#else
-
-#define ANNOTATE_IGNORE_WRITES_BEGIN()  // empty
-#define ANNOTATE_IGNORE_WRITES_END()    // empty
-
-#endif
-
-// -------------------------------------------------------------------------
-// Define the ANNOTATE_IGNORE_READS_AND_WRITES_* annotations using the more
-// primitive annotations defined above.
-//
-//     Instead of doing
-//        ANNOTATE_IGNORE_READS_BEGIN();
-//        ... = x;
-//        ANNOTATE_IGNORE_READS_END();
-//     one can use
-//        ... = ANNOTATE_UNPROTECTED_READ(x);
-
-#if defined(ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED)
-
-// Start ignoring all memory accesses (both reads and writes).
-#define ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN() \
-  do {                                           \
-    ANNOTATE_IGNORE_READS_BEGIN();               \
-    ANNOTATE_IGNORE_WRITES_BEGIN();              \
-  } while (0)
-
-// Stop ignoring both reads and writes.
-#define ANNOTATE_IGNORE_READS_AND_WRITES_END() \
-  do {                                         \
-    ANNOTATE_IGNORE_WRITES_END();              \
-    ANNOTATE_IGNORE_READS_END();               \
-  } while (0)
-
-#ifdef __cplusplus
-// ANNOTATE_UNPROTECTED_READ is the preferred way to annotate racey reads.
-#define ANNOTATE_UNPROTECTED_READ(x) \
-  absl::base_internal::AnnotateUnprotectedRead(x)
-
-#endif
-
-#else
-
-#define ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN()  // empty
-#define ANNOTATE_IGNORE_READS_AND_WRITES_END()    // empty
-#define ANNOTATE_UNPROTECTED_READ(x) (x)
-
-#endif
-
-// -------------------------------------------------------------------------
-// Address sanitizer annotations
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-// Describe the current state of a contiguous container such as e.g.
-// std::vector or std::string. For more details see
-// sanitizer/common_interface_defs.h, which is provided by the compiler.
-#include <sanitizer/common_interface_defs.h>
-
-#define ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid) \
-  __sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid)
-#define ADDRESS_SANITIZER_REDZONE(name)    \
-  struct {                                 \
-    char x[8] __attribute__((aligned(8))); \
-  } name
-
-#else
-
-#define ANNOTATE_CONTIGUOUS_CONTAINER(beg, end, old_mid, new_mid)
-#define ADDRESS_SANITIZER_REDZONE(name) static_assert(true, "")
-
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-
-// -------------------------------------------------------------------------
-// Undefine the macros intended only for this file.
-
-#undef ABSL_INTERNAL_RACE_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_MEMORY_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_READS_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_WRITES_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_ANNOTALYSIS_ENABLED
-#undef ABSL_INTERNAL_READS_WRITES_ANNOTATIONS_ENABLED
-#undef ABSL_INTERNAL_BEGIN_EXTERN_C
-#undef ABSL_INTERNAL_END_EXTERN_C
-#undef ABSL_INTERNAL_STATIC_INLINE
-
-#endif  // ABSL_BASE_INTERNAL_DYNAMIC_ANNOTATIONS_H_
diff --git a/third_party/abseil/absl/base/internal/endian.h b/third_party/abseil/absl/base/internal/endian.h
deleted file mode 100644
index 9677530..0000000
--- a/third_party/abseil/absl/base/internal/endian.h
+++ /dev/null
@@ -1,266 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_ENDIAN_H_
-#define ABSL_BASE_INTERNAL_ENDIAN_H_
-
-// The following guarantees declaration of the byte swap functions
-#ifdef _MSC_VER
-#include <stdlib.h>  // NOLINT(build/include)
-#elif defined(__FreeBSD__)
-#include <sys/endian.h>
-#elif defined(__GLIBC__)
-#include <byteswap.h>  // IWYU pragma: export
-#endif
-
-#include <cstdint>
-#include "absl/base/config.h"
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Use compiler byte-swapping intrinsics if they are available.  32-bit
-// and 64-bit versions are available in Clang and GCC as of GCC 4.3.0.
-// The 16-bit version is available in Clang and GCC only as of GCC 4.8.0.
-// For simplicity, we enable them all only for GCC 4.8.0 or later.
-#if defined(__clang__) || \
-    (defined(__GNUC__) && \
-     ((__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || __GNUC__ >= 5))
-inline uint64_t gbswap_64(uint64_t host_int) {
-  return __builtin_bswap64(host_int);
-}
-inline uint32_t gbswap_32(uint32_t host_int) {
-  return __builtin_bswap32(host_int);
-}
-inline uint16_t gbswap_16(uint16_t host_int) {
-  return __builtin_bswap16(host_int);
-}
-
-#elif defined(_MSC_VER)
-inline uint64_t gbswap_64(uint64_t host_int) {
-  return _byteswap_uint64(host_int);
-}
-inline uint32_t gbswap_32(uint32_t host_int) {
-  return _byteswap_ulong(host_int);
-}
-inline uint16_t gbswap_16(uint16_t host_int) {
-  return _byteswap_ushort(host_int);
-}
-
-#else
-inline uint64_t gbswap_64(uint64_t host_int) {
-#if defined(__GNUC__) && defined(__x86_64__) && !defined(__APPLE__)
-  // Adapted from /usr/include/byteswap.h.  Not available on Mac.
-  if (__builtin_constant_p(host_int)) {
-    return __bswap_constant_64(host_int);
-  } else {
-    uint64_t result;
-    __asm__("bswap %0" : "=r"(result) : "0"(host_int));
-    return result;
-  }
-#elif defined(__GLIBC__)
-  return bswap_64(host_int);
-#else
-  return (((host_int & uint64_t{0xFF}) << 56) |
-          ((host_int & uint64_t{0xFF00}) << 40) |
-          ((host_int & uint64_t{0xFF0000}) << 24) |
-          ((host_int & uint64_t{0xFF000000}) << 8) |
-          ((host_int & uint64_t{0xFF00000000}) >> 8) |
-          ((host_int & uint64_t{0xFF0000000000}) >> 24) |
-          ((host_int & uint64_t{0xFF000000000000}) >> 40) |
-          ((host_int & uint64_t{0xFF00000000000000}) >> 56));
-#endif  // bswap_64
-}
-
-inline uint32_t gbswap_32(uint32_t host_int) {
-#if defined(__GLIBC__)
-  return bswap_32(host_int);
-#else
-  return (((host_int & uint32_t{0xFF}) << 24) |
-          ((host_int & uint32_t{0xFF00}) << 8) |
-          ((host_int & uint32_t{0xFF0000}) >> 8) |
-          ((host_int & uint32_t{0xFF000000}) >> 24));
-#endif
-}
-
-inline uint16_t gbswap_16(uint16_t host_int) {
-#if defined(__GLIBC__)
-  return bswap_16(host_int);
-#else
-  return (((host_int & uint16_t{0xFF}) << 8) |
-          ((host_int & uint16_t{0xFF00}) >> 8));
-#endif
-}
-
-#endif  // intrinsics available
-
-#ifdef ABSL_IS_LITTLE_ENDIAN
-
-// Definitions for ntohl etc. that don't require us to include
-// netinet/in.h. We wrap gbswap_32 and gbswap_16 in functions rather
-// than just #defining them because in debug mode, gcc doesn't
-// correctly handle the (rather involved) definitions of bswap_32.
-// gcc guarantees that inline functions are as fast as macros, so
-// this isn't a performance hit.
-inline uint16_t ghtons(uint16_t x) { return gbswap_16(x); }
-inline uint32_t ghtonl(uint32_t x) { return gbswap_32(x); }
-inline uint64_t ghtonll(uint64_t x) { return gbswap_64(x); }
-
-#elif defined ABSL_IS_BIG_ENDIAN
-
-// These definitions are simpler on big-endian machines
-// These are functions instead of macros to avoid self-assignment warnings
-// on calls such as "i = ghtnol(i);".  This also provides type checking.
-inline uint16_t ghtons(uint16_t x) { return x; }
-inline uint32_t ghtonl(uint32_t x) { return x; }
-inline uint64_t ghtonll(uint64_t x) { return x; }
-
-#else
-#error \
-    "Unsupported byte order: Either ABSL_IS_BIG_ENDIAN or " \
-       "ABSL_IS_LITTLE_ENDIAN must be defined"
-#endif  // byte order
-
-inline uint16_t gntohs(uint16_t x) { return ghtons(x); }
-inline uint32_t gntohl(uint32_t x) { return ghtonl(x); }
-inline uint64_t gntohll(uint64_t x) { return ghtonll(x); }
-
-// Utilities to convert numbers between the current hosts's native byte
-// order and little-endian byte order
-//
-// Load/Store methods are alignment safe
-namespace little_endian {
-// Conversion functions.
-#ifdef ABSL_IS_LITTLE_ENDIAN
-
-inline uint16_t FromHost16(uint16_t x) { return x; }
-inline uint16_t ToHost16(uint16_t x) { return x; }
-
-inline uint32_t FromHost32(uint32_t x) { return x; }
-inline uint32_t ToHost32(uint32_t x) { return x; }
-
-inline uint64_t FromHost64(uint64_t x) { return x; }
-inline uint64_t ToHost64(uint64_t x) { return x; }
-
-inline constexpr bool IsLittleEndian() { return true; }
-
-#elif defined ABSL_IS_BIG_ENDIAN
-
-inline uint16_t FromHost16(uint16_t x) { return gbswap_16(x); }
-inline uint16_t ToHost16(uint16_t x) { return gbswap_16(x); }
-
-inline uint32_t FromHost32(uint32_t x) { return gbswap_32(x); }
-inline uint32_t ToHost32(uint32_t x) { return gbswap_32(x); }
-
-inline uint64_t FromHost64(uint64_t x) { return gbswap_64(x); }
-inline uint64_t ToHost64(uint64_t x) { return gbswap_64(x); }
-
-inline constexpr bool IsLittleEndian() { return false; }
-
-#endif /* ENDIAN */
-
-// Functions to do unaligned loads and stores in little-endian order.
-inline uint16_t Load16(const void *p) {
-  return ToHost16(ABSL_INTERNAL_UNALIGNED_LOAD16(p));
-}
-
-inline void Store16(void *p, uint16_t v) {
-  ABSL_INTERNAL_UNALIGNED_STORE16(p, FromHost16(v));
-}
-
-inline uint32_t Load32(const void *p) {
-  return ToHost32(ABSL_INTERNAL_UNALIGNED_LOAD32(p));
-}
-
-inline void Store32(void *p, uint32_t v) {
-  ABSL_INTERNAL_UNALIGNED_STORE32(p, FromHost32(v));
-}
-
-inline uint64_t Load64(const void *p) {
-  return ToHost64(ABSL_INTERNAL_UNALIGNED_LOAD64(p));
-}
-
-inline void Store64(void *p, uint64_t v) {
-  ABSL_INTERNAL_UNALIGNED_STORE64(p, FromHost64(v));
-}
-
-}  // namespace little_endian
-
-// Utilities to convert numbers between the current hosts's native byte
-// order and big-endian byte order (same as network byte order)
-//
-// Load/Store methods are alignment safe
-namespace big_endian {
-#ifdef ABSL_IS_LITTLE_ENDIAN
-
-inline uint16_t FromHost16(uint16_t x) { return gbswap_16(x); }
-inline uint16_t ToHost16(uint16_t x) { return gbswap_16(x); }
-
-inline uint32_t FromHost32(uint32_t x) { return gbswap_32(x); }
-inline uint32_t ToHost32(uint32_t x) { return gbswap_32(x); }
-
-inline uint64_t FromHost64(uint64_t x) { return gbswap_64(x); }
-inline uint64_t ToHost64(uint64_t x) { return gbswap_64(x); }
-
-inline constexpr bool IsLittleEndian() { return true; }
-
-#elif defined ABSL_IS_BIG_ENDIAN
-
-inline uint16_t FromHost16(uint16_t x) { return x; }
-inline uint16_t ToHost16(uint16_t x) { return x; }
-
-inline uint32_t FromHost32(uint32_t x) { return x; }
-inline uint32_t ToHost32(uint32_t x) { return x; }
-
-inline uint64_t FromHost64(uint64_t x) { return x; }
-inline uint64_t ToHost64(uint64_t x) { return x; }
-
-inline constexpr bool IsLittleEndian() { return false; }
-
-#endif /* ENDIAN */
-
-// Functions to do unaligned loads and stores in big-endian order.
-inline uint16_t Load16(const void *p) {
-  return ToHost16(ABSL_INTERNAL_UNALIGNED_LOAD16(p));
-}
-
-inline void Store16(void *p, uint16_t v) {
-  ABSL_INTERNAL_UNALIGNED_STORE16(p, FromHost16(v));
-}
-
-inline uint32_t Load32(const void *p) {
-  return ToHost32(ABSL_INTERNAL_UNALIGNED_LOAD32(p));
-}
-
-inline void Store32(void *p, uint32_t v) {
-  ABSL_INTERNAL_UNALIGNED_STORE32(p, FromHost32(v));
-}
-
-inline uint64_t Load64(const void *p) {
-  return ToHost64(ABSL_INTERNAL_UNALIGNED_LOAD64(p));
-}
-
-inline void Store64(void *p, uint64_t v) {
-  ABSL_INTERNAL_UNALIGNED_STORE64(p, FromHost64(v));
-}
-
-}  // namespace big_endian
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_ENDIAN_H_
diff --git a/third_party/abseil/absl/base/internal/endian_test.cc b/third_party/abseil/absl/base/internal/endian_test.cc
deleted file mode 100644
index a1691b1..0000000
--- a/third_party/abseil/absl/base/internal/endian_test.cc
+++ /dev/null
@@ -1,263 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/endian.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <limits>
-#include <random>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-const uint64_t kInitialNumber{0x0123456789abcdef};
-const uint64_t k64Value{kInitialNumber};
-const uint32_t k32Value{0x01234567};
-const uint16_t k16Value{0x0123};
-const int kNumValuesToTest = 1000000;
-const int kRandomSeed = 12345;
-
-#if defined(ABSL_IS_BIG_ENDIAN)
-const uint64_t kInitialInNetworkOrder{kInitialNumber};
-const uint64_t k64ValueLE{0xefcdab8967452301};
-const uint32_t k32ValueLE{0x67452301};
-const uint16_t k16ValueLE{0x2301};
-
-const uint64_t k64ValueBE{kInitialNumber};
-const uint32_t k32ValueBE{k32Value};
-const uint16_t k16ValueBE{k16Value};
-#elif defined(ABSL_IS_LITTLE_ENDIAN)
-const uint64_t kInitialInNetworkOrder{0xefcdab8967452301};
-const uint64_t k64ValueLE{kInitialNumber};
-const uint32_t k32ValueLE{k32Value};
-const uint16_t k16ValueLE{k16Value};
-
-const uint64_t k64ValueBE{0xefcdab8967452301};
-const uint32_t k32ValueBE{0x67452301};
-const uint16_t k16ValueBE{0x2301};
-#endif
-
-std::vector<uint16_t> GenerateAllUint16Values() {
-  std::vector<uint16_t> result;
-  result.reserve(size_t{1} << (sizeof(uint16_t) * 8));
-  for (uint32_t i = std::numeric_limits<uint16_t>::min();
-       i <= std::numeric_limits<uint16_t>::max(); ++i) {
-    result.push_back(static_cast<uint16_t>(i));
-  }
-  return result;
-}
-
-template<typename T>
-std::vector<T> GenerateRandomIntegers(size_t num_values_to_test) {
-  std::vector<T> result;
-  result.reserve(num_values_to_test);
-  std::mt19937_64 rng(kRandomSeed);
-  for (size_t i = 0; i < num_values_to_test; ++i) {
-    result.push_back(rng());
-  }
-  return result;
-}
-
-void ManualByteSwap(char* bytes, int length) {
-  if (length == 1)
-    return;
-
-  EXPECT_EQ(0, length % 2);
-  for (int i = 0; i < length / 2; ++i) {
-    int j = (length - 1) - i;
-    using std::swap;
-    swap(bytes[i], bytes[j]);
-  }
-}
-
-template<typename T>
-inline T UnalignedLoad(const char* p) {
-  static_assert(
-      sizeof(T) == 1 || sizeof(T) == 2 || sizeof(T) == 4 || sizeof(T) == 8,
-      "Unexpected type size");
-
-  switch (sizeof(T)) {
-    case 1: return *reinterpret_cast<const T*>(p);
-    case 2:
-      return ABSL_INTERNAL_UNALIGNED_LOAD16(p);
-    case 4:
-      return ABSL_INTERNAL_UNALIGNED_LOAD32(p);
-    case 8:
-      return ABSL_INTERNAL_UNALIGNED_LOAD64(p);
-    default:
-      // Suppresses invalid "not all control paths return a value" on MSVC
-      return {};
-  }
-}
-
-template <typename T, typename ByteSwapper>
-static void GBSwapHelper(const std::vector<T>& host_values_to_test,
-                         const ByteSwapper& byte_swapper) {
-  // Test byte_swapper against a manual byte swap.
-  for (typename std::vector<T>::const_iterator it = host_values_to_test.begin();
-       it != host_values_to_test.end(); ++it) {
-    T host_value = *it;
-
-    char actual_value[sizeof(host_value)];
-    memcpy(actual_value, &host_value, sizeof(host_value));
-    byte_swapper(actual_value);
-
-    char expected_value[sizeof(host_value)];
-    memcpy(expected_value, &host_value, sizeof(host_value));
-    ManualByteSwap(expected_value, sizeof(host_value));
-
-    ASSERT_EQ(0, memcmp(actual_value, expected_value, sizeof(host_value)))
-        << "Swap output for 0x" << std::hex << host_value << " does not match. "
-        << "Expected: 0x" << UnalignedLoad<T>(expected_value) << "; "
-        << "actual: 0x" <<  UnalignedLoad<T>(actual_value);
-  }
-}
-
-void Swap16(char* bytes) {
-  ABSL_INTERNAL_UNALIGNED_STORE16(
-      bytes, gbswap_16(ABSL_INTERNAL_UNALIGNED_LOAD16(bytes)));
-}
-
-void Swap32(char* bytes) {
-  ABSL_INTERNAL_UNALIGNED_STORE32(
-      bytes, gbswap_32(ABSL_INTERNAL_UNALIGNED_LOAD32(bytes)));
-}
-
-void Swap64(char* bytes) {
-  ABSL_INTERNAL_UNALIGNED_STORE64(
-      bytes, gbswap_64(ABSL_INTERNAL_UNALIGNED_LOAD64(bytes)));
-}
-
-TEST(EndianessTest, Uint16) {
-  GBSwapHelper(GenerateAllUint16Values(), &Swap16);
-}
-
-TEST(EndianessTest, Uint32) {
-  GBSwapHelper(GenerateRandomIntegers<uint32_t>(kNumValuesToTest), &Swap32);
-}
-
-TEST(EndianessTest, Uint64) {
-  GBSwapHelper(GenerateRandomIntegers<uint64_t>(kNumValuesToTest), &Swap64);
-}
-
-TEST(EndianessTest, ghtonll_gntohll) {
-  // Test that absl::ghtonl compiles correctly
-  uint32_t test = 0x01234567;
-  EXPECT_EQ(absl::gntohl(absl::ghtonl(test)), test);
-
-  uint64_t comp = absl::ghtonll(kInitialNumber);
-  EXPECT_EQ(comp, kInitialInNetworkOrder);
-  comp = absl::gntohll(kInitialInNetworkOrder);
-  EXPECT_EQ(comp, kInitialNumber);
-
-  // Test that htonll and ntohll are each others' inverse functions on a
-  // somewhat assorted batch of numbers. 37 is chosen to not be anything
-  // particularly nice base 2.
-  uint64_t value = 1;
-  for (int i = 0; i < 100; ++i) {
-    comp = absl::ghtonll(absl::gntohll(value));
-    EXPECT_EQ(value, comp);
-    comp = absl::gntohll(absl::ghtonll(value));
-    EXPECT_EQ(value, comp);
-    value *= 37;
-  }
-}
-
-TEST(EndianessTest, little_endian) {
-  // Check little_endian uint16_t.
-  uint64_t comp = little_endian::FromHost16(k16Value);
-  EXPECT_EQ(comp, k16ValueLE);
-  comp = little_endian::ToHost16(k16ValueLE);
-  EXPECT_EQ(comp, k16Value);
-
-  // Check little_endian uint32_t.
-  comp = little_endian::FromHost32(k32Value);
-  EXPECT_EQ(comp, k32ValueLE);
-  comp = little_endian::ToHost32(k32ValueLE);
-  EXPECT_EQ(comp, k32Value);
-
-  // Check little_endian uint64_t.
-  comp = little_endian::FromHost64(k64Value);
-  EXPECT_EQ(comp, k64ValueLE);
-  comp = little_endian::ToHost64(k64ValueLE);
-  EXPECT_EQ(comp, k64Value);
-
-  // Check little-endian Load and store functions.
-  uint16_t u16Buf;
-  uint32_t u32Buf;
-  uint64_t u64Buf;
-
-  little_endian::Store16(&u16Buf, k16Value);
-  EXPECT_EQ(u16Buf, k16ValueLE);
-  comp = little_endian::Load16(&u16Buf);
-  EXPECT_EQ(comp, k16Value);
-
-  little_endian::Store32(&u32Buf, k32Value);
-  EXPECT_EQ(u32Buf, k32ValueLE);
-  comp = little_endian::Load32(&u32Buf);
-  EXPECT_EQ(comp, k32Value);
-
-  little_endian::Store64(&u64Buf, k64Value);
-  EXPECT_EQ(u64Buf, k64ValueLE);
-  comp = little_endian::Load64(&u64Buf);
-  EXPECT_EQ(comp, k64Value);
-}
-
-TEST(EndianessTest, big_endian) {
-  // Check big-endian Load and store functions.
-  uint16_t u16Buf;
-  uint32_t u32Buf;
-  uint64_t u64Buf;
-
-  unsigned char buffer[10];
-  big_endian::Store16(&u16Buf, k16Value);
-  EXPECT_EQ(u16Buf, k16ValueBE);
-  uint64_t comp = big_endian::Load16(&u16Buf);
-  EXPECT_EQ(comp, k16Value);
-
-  big_endian::Store32(&u32Buf, k32Value);
-  EXPECT_EQ(u32Buf, k32ValueBE);
-  comp = big_endian::Load32(&u32Buf);
-  EXPECT_EQ(comp, k32Value);
-
-  big_endian::Store64(&u64Buf, k64Value);
-  EXPECT_EQ(u64Buf, k64ValueBE);
-  comp = big_endian::Load64(&u64Buf);
-  EXPECT_EQ(comp, k64Value);
-
-  big_endian::Store16(buffer + 1, k16Value);
-  EXPECT_EQ(u16Buf, k16ValueBE);
-  comp = big_endian::Load16(buffer + 1);
-  EXPECT_EQ(comp, k16Value);
-
-  big_endian::Store32(buffer + 1, k32Value);
-  EXPECT_EQ(u32Buf, k32ValueBE);
-  comp = big_endian::Load32(buffer + 1);
-  EXPECT_EQ(comp, k32Value);
-
-  big_endian::Store64(buffer + 1, k64Value);
-  EXPECT_EQ(u64Buf, k64ValueBE);
-  comp = big_endian::Load64(buffer + 1);
-  EXPECT_EQ(comp, k64Value);
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/errno_saver.h b/third_party/abseil/absl/base/internal/errno_saver.h
deleted file mode 100644
index 251de51..0000000
--- a/third_party/abseil/absl/base/internal/errno_saver.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_ERRNO_SAVER_H_
-#define ABSL_BASE_INTERNAL_ERRNO_SAVER_H_
-
-#include <cerrno>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// `ErrnoSaver` captures the value of `errno` upon construction and restores it
-// upon deletion.  It is used in low-level code and must be super fast.  Do not
-// add instrumentation, even in debug modes.
-class ErrnoSaver {
- public:
-  ErrnoSaver() : saved_errno_(errno) {}
-  ~ErrnoSaver() { errno = saved_errno_; }
-  int operator()() const { return saved_errno_; }
-
- private:
-  const int saved_errno_;
-};
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_ERRNO_SAVER_H_
diff --git a/third_party/abseil/absl/base/internal/errno_saver_test.cc b/third_party/abseil/absl/base/internal/errno_saver_test.cc
deleted file mode 100644
index e9b742c..0000000
--- a/third_party/abseil/absl/base/internal/errno_saver_test.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/errno_saver.h"
-
-#include <cerrno>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/strerror.h"
-
-namespace {
-using ::testing::Eq;
-
-struct ErrnoPrinter {
-  int no;
-};
-std::ostream &operator<<(std::ostream &os, ErrnoPrinter ep) {
-  return os << absl::base_internal::StrError(ep.no) << " [" << ep.no << "]";
-}
-bool operator==(ErrnoPrinter one, ErrnoPrinter two) { return one.no == two.no; }
-
-TEST(ErrnoSaverTest, Works) {
-  errno = EDOM;
-  {
-    absl::base_internal::ErrnoSaver errno_saver;
-    EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{EDOM}));
-    errno = ERANGE;
-    EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{ERANGE}));
-    EXPECT_THAT(ErrnoPrinter{errno_saver()}, Eq(ErrnoPrinter{EDOM}));
-  }
-  EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{EDOM}));
-}
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/exception_safety_testing.cc b/third_party/abseil/absl/base/internal/exception_safety_testing.cc
deleted file mode 100644
index 6ccac41..0000000
--- a/third_party/abseil/absl/base/internal/exception_safety_testing.cc
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/exception_safety_testing.h"
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-
-namespace testing {
-
-exceptions_internal::NoThrowTag nothrow_ctor;
-
-exceptions_internal::StrongGuaranteeTagType strong_guarantee;
-
-exceptions_internal::ExceptionSafetyTestBuilder<> MakeExceptionSafetyTester() {
-  return {};
-}
-
-namespace exceptions_internal {
-
-int countdown = -1;
-
-ConstructorTracker* ConstructorTracker::current_tracker_instance_ = nullptr;
-
-void MaybeThrow(absl::string_view msg, bool throw_bad_alloc) {
-  if (countdown-- == 0) {
-    if (throw_bad_alloc) throw TestBadAllocException(msg);
-    throw TestException(msg);
-  }
-}
-
-testing::AssertionResult FailureMessage(const TestException& e,
-                                        int countdown) noexcept {
-  return testing::AssertionFailure() << "Exception thrown from " << e.what();
-}
-
-std::string GetSpecString(TypeSpec spec) {
-  std::string out;
-  absl::string_view sep;
-  const auto append = [&](absl::string_view s) {
-    absl::StrAppend(&out, sep, s);
-    sep = " | ";
-  };
-  if (static_cast<bool>(TypeSpec::kNoThrowCopy & spec)) {
-    append("kNoThrowCopy");
-  }
-  if (static_cast<bool>(TypeSpec::kNoThrowMove & spec)) {
-    append("kNoThrowMove");
-  }
-  if (static_cast<bool>(TypeSpec::kNoThrowNew & spec)) {
-    append("kNoThrowNew");
-  }
-  return out;
-}
-
-std::string GetSpecString(AllocSpec spec) {
-  return static_cast<bool>(AllocSpec::kNoThrowAllocate & spec)
-             ? "kNoThrowAllocate"
-             : "";
-}
-
-}  // namespace exceptions_internal
-
-}  // namespace testing
-
-#endif  // ABSL_HAVE_EXCEPTIONS
diff --git a/third_party/abseil/absl/base/internal/exception_safety_testing.h b/third_party/abseil/absl/base/internal/exception_safety_testing.h
deleted file mode 100644
index 6ba89d0..0000000
--- a/third_party/abseil/absl/base/internal/exception_safety_testing.h
+++ /dev/null
@@ -1,1101 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Utilities for testing exception-safety
-
-#ifndef ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_
-#define ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_
-
-#include "absl/base/config.h"
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#include <cstddef>
-#include <cstdint>
-#include <functional>
-#include <initializer_list>
-#include <iosfwd>
-#include <string>
-#include <tuple>
-#include <unordered_map>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/pretty_function.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/substitute.h"
-#include "absl/utility/utility.h"
-
-namespace testing {
-
-enum class TypeSpec;
-enum class AllocSpec;
-
-constexpr TypeSpec operator|(TypeSpec a, TypeSpec b) {
-  using T = absl::underlying_type_t<TypeSpec>;
-  return static_cast<TypeSpec>(static_cast<T>(a) | static_cast<T>(b));
-}
-
-constexpr TypeSpec operator&(TypeSpec a, TypeSpec b) {
-  using T = absl::underlying_type_t<TypeSpec>;
-  return static_cast<TypeSpec>(static_cast<T>(a) & static_cast<T>(b));
-}
-
-constexpr AllocSpec operator|(AllocSpec a, AllocSpec b) {
-  using T = absl::underlying_type_t<AllocSpec>;
-  return static_cast<AllocSpec>(static_cast<T>(a) | static_cast<T>(b));
-}
-
-constexpr AllocSpec operator&(AllocSpec a, AllocSpec b) {
-  using T = absl::underlying_type_t<AllocSpec>;
-  return static_cast<AllocSpec>(static_cast<T>(a) & static_cast<T>(b));
-}
-
-namespace exceptions_internal {
-
-std::string GetSpecString(TypeSpec);
-std::string GetSpecString(AllocSpec);
-
-struct NoThrowTag {};
-struct StrongGuaranteeTagType {};
-
-// A simple exception class.  We throw this so that test code can catch
-// exceptions specifically thrown by ThrowingValue.
-class TestException {
- public:
-  explicit TestException(absl::string_view msg) : msg_(msg) {}
-  virtual ~TestException() {}
-  virtual const char* what() const noexcept { return msg_.c_str(); }
-
- private:
-  std::string msg_;
-};
-
-// TestBadAllocException exists because allocation functions must throw an
-// exception which can be caught by a handler of std::bad_alloc.  We use a child
-// class of std::bad_alloc so we can customise the error message, and also
-// derive from TestException so we don't accidentally end up catching an actual
-// bad_alloc exception in TestExceptionSafety.
-class TestBadAllocException : public std::bad_alloc, public TestException {
- public:
-  explicit TestBadAllocException(absl::string_view msg) : TestException(msg) {}
-  using TestException::what;
-};
-
-extern int countdown;
-
-// Allows the countdown variable to be set manually (defaulting to the initial
-// value of 0)
-inline void SetCountdown(int i = 0) { countdown = i; }
-// Sets the countdown to the terminal value -1
-inline void UnsetCountdown() { SetCountdown(-1); }
-
-void MaybeThrow(absl::string_view msg, bool throw_bad_alloc = false);
-
-testing::AssertionResult FailureMessage(const TestException& e,
-                                        int countdown) noexcept;
-
-struct TrackedAddress {
-  bool is_alive;
-  std::string description;
-};
-
-// Inspects the constructions and destructions of anything inheriting from
-// TrackedObject. This allows us to safely "leak" TrackedObjects, as
-// ConstructorTracker will destroy everything left over in its destructor.
-class ConstructorTracker {
- public:
-  explicit ConstructorTracker(int count) : countdown_(count) {
-    assert(current_tracker_instance_ == nullptr);
-    current_tracker_instance_ = this;
-  }
-
-  ~ConstructorTracker() {
-    assert(current_tracker_instance_ == this);
-    current_tracker_instance_ = nullptr;
-
-    for (auto& it : address_map_) {
-      void* address = it.first;
-      TrackedAddress& tracked_address = it.second;
-      if (tracked_address.is_alive) {
-        ADD_FAILURE() << ErrorMessage(address, tracked_address.description,
-                                      countdown_, "Object was not destroyed.");
-      }
-    }
-  }
-
-  static void ObjectConstructed(void* address, std::string description) {
-    if (!CurrentlyTracking()) return;
-
-    TrackedAddress& tracked_address =
-        current_tracker_instance_->address_map_[address];
-    if (tracked_address.is_alive) {
-      ADD_FAILURE() << ErrorMessage(
-          address, tracked_address.description,
-          current_tracker_instance_->countdown_,
-          "Object was re-constructed. Current object was constructed by " +
-              description);
-    }
-    tracked_address = {true, std::move(description)};
-  }
-
-  static void ObjectDestructed(void* address) {
-    if (!CurrentlyTracking()) return;
-
-    auto it = current_tracker_instance_->address_map_.find(address);
-    // Not tracked. Ignore.
-    if (it == current_tracker_instance_->address_map_.end()) return;
-
-    TrackedAddress& tracked_address = it->second;
-    if (!tracked_address.is_alive) {
-      ADD_FAILURE() << ErrorMessage(address, tracked_address.description,
-                                    current_tracker_instance_->countdown_,
-                                    "Object was re-destroyed.");
-    }
-    tracked_address.is_alive = false;
-  }
-
- private:
-  static bool CurrentlyTracking() {
-    return current_tracker_instance_ != nullptr;
-  }
-
-  static std::string ErrorMessage(void* address,
-                                  const std::string& address_description,
-                                  int countdown,
-                                  const std::string& error_description) {
-    return absl::Substitute(
-        "With coundtown at $0:\n"
-        "  $1\n"
-        "  Object originally constructed by $2\n"
-        "  Object address: $3\n",
-        countdown, error_description, address_description, address);
-  }
-
-  std::unordered_map<void*, TrackedAddress> address_map_;
-  int countdown_;
-
-  static ConstructorTracker* current_tracker_instance_;
-};
-
-class TrackedObject {
- public:
-  TrackedObject(const TrackedObject&) = delete;
-  TrackedObject(TrackedObject&&) = delete;
-
- protected:
-  explicit TrackedObject(std::string description) {
-    ConstructorTracker::ObjectConstructed(this, std::move(description));
-  }
-
-  ~TrackedObject() noexcept { ConstructorTracker::ObjectDestructed(this); }
-};
-}  // namespace exceptions_internal
-
-extern exceptions_internal::NoThrowTag nothrow_ctor;
-
-extern exceptions_internal::StrongGuaranteeTagType strong_guarantee;
-
-// A test class which is convertible to bool.  The conversion can be
-// instrumented to throw at a controlled time.
-class ThrowingBool {
- public:
-  ThrowingBool(bool b) noexcept : b_(b) {}  // NOLINT(runtime/explicit)
-  operator bool() const {                   // NOLINT
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return b_;
-  }
-
- private:
-  bool b_;
-};
-
-/*
- * Configuration enum for the ThrowingValue type that defines behavior for the
- * lifetime of the instance. Use testing::nothrow_ctor to prevent the integer
- * constructor from throwing.
- *
- * kEverythingThrows: Every operation can throw an exception
- * kNoThrowCopy: Copy construction and copy assignment will not throw
- * kNoThrowMove: Move construction and move assignment will not throw
- * kNoThrowNew: Overloaded operators new and new[] will not throw
- */
-enum class TypeSpec {
-  kEverythingThrows = 0,
-  kNoThrowCopy = 1,
-  kNoThrowMove = 1 << 1,
-  kNoThrowNew = 1 << 2,
-};
-
-/*
- * A testing class instrumented to throw an exception at a controlled time.
- *
- * ThrowingValue implements a slightly relaxed version of the Regular concept --
- * that is it's a value type with the expected semantics.  It also implements
- * arithmetic operations.  It doesn't implement member and pointer operators
- * like operator-> or operator[].
- *
- * ThrowingValue can be instrumented to have certain operations be noexcept by
- * using compile-time bitfield template arguments.  That is, to make an
- * ThrowingValue which has noexcept move construction/assignment and noexcept
- * copy construction/assignment, use the following:
- *   ThrowingValue<testing::kNoThrowMove | testing::kNoThrowCopy> my_thrwr{val};
- */
-template <TypeSpec Spec = TypeSpec::kEverythingThrows>
-class ThrowingValue : private exceptions_internal::TrackedObject {
-  static constexpr bool IsSpecified(TypeSpec spec) {
-    return static_cast<bool>(Spec & spec);
-  }
-
-  static constexpr int kDefaultValue = 0;
-  static constexpr int kBadValue = 938550620;
-
- public:
-  ThrowingValue() : TrackedObject(GetInstanceString(kDefaultValue)) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ = kDefaultValue;
-  }
-
-  ThrowingValue(const ThrowingValue& other) noexcept(
-      IsSpecified(TypeSpec::kNoThrowCopy))
-      : TrackedObject(GetInstanceString(other.dummy_)) {
-    if (!IsSpecified(TypeSpec::kNoThrowCopy)) {
-      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    }
-    dummy_ = other.dummy_;
-  }
-
-  ThrowingValue(ThrowingValue&& other) noexcept(
-      IsSpecified(TypeSpec::kNoThrowMove))
-      : TrackedObject(GetInstanceString(other.dummy_)) {
-    if (!IsSpecified(TypeSpec::kNoThrowMove)) {
-      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    }
-    dummy_ = other.dummy_;
-  }
-
-  explicit ThrowingValue(int i) : TrackedObject(GetInstanceString(i)) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ = i;
-  }
-
-  ThrowingValue(int i, exceptions_internal::NoThrowTag) noexcept
-      : TrackedObject(GetInstanceString(i)), dummy_(i) {}
-
-  // absl expects nothrow destructors
-  ~ThrowingValue() noexcept = default;
-
-  ThrowingValue& operator=(const ThrowingValue& other) noexcept(
-      IsSpecified(TypeSpec::kNoThrowCopy)) {
-    dummy_ = kBadValue;
-    if (!IsSpecified(TypeSpec::kNoThrowCopy)) {
-      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    }
-    dummy_ = other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator=(ThrowingValue&& other) noexcept(
-      IsSpecified(TypeSpec::kNoThrowMove)) {
-    dummy_ = kBadValue;
-    if (!IsSpecified(TypeSpec::kNoThrowMove)) {
-      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    }
-    dummy_ = other.dummy_;
-    return *this;
-  }
-
-  // Arithmetic Operators
-  ThrowingValue operator+(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ + other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator+() const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator-(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ - other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator-() const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(-dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue& operator++() {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    ++dummy_;
-    return *this;
-  }
-
-  ThrowingValue operator++(int) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    auto out = ThrowingValue(dummy_, nothrow_ctor);
-    ++dummy_;
-    return out;
-  }
-
-  ThrowingValue& operator--() {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    --dummy_;
-    return *this;
-  }
-
-  ThrowingValue operator--(int) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    auto out = ThrowingValue(dummy_, nothrow_ctor);
-    --dummy_;
-    return out;
-  }
-
-  ThrowingValue operator*(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ * other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator/(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ / other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator%(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ % other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator<<(int shift) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ << shift, nothrow_ctor);
-  }
-
-  ThrowingValue operator>>(int shift) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ >> shift, nothrow_ctor);
-  }
-
-  // Comparison Operators
-  // NOTE: We use `ThrowingBool` instead of `bool` because most STL
-  // types/containers requires T to be convertible to bool.
-  friend ThrowingBool operator==(const ThrowingValue& a,
-                                 const ThrowingValue& b) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return a.dummy_ == b.dummy_;
-  }
-  friend ThrowingBool operator!=(const ThrowingValue& a,
-                                 const ThrowingValue& b) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return a.dummy_ != b.dummy_;
-  }
-  friend ThrowingBool operator<(const ThrowingValue& a,
-                                const ThrowingValue& b) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return a.dummy_ < b.dummy_;
-  }
-  friend ThrowingBool operator<=(const ThrowingValue& a,
-                                 const ThrowingValue& b) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return a.dummy_ <= b.dummy_;
-  }
-  friend ThrowingBool operator>(const ThrowingValue& a,
-                                const ThrowingValue& b) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return a.dummy_ > b.dummy_;
-  }
-  friend ThrowingBool operator>=(const ThrowingValue& a,
-                                 const ThrowingValue& b) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return a.dummy_ >= b.dummy_;
-  }
-
-  // Logical Operators
-  ThrowingBool operator!() const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return !dummy_;
-  }
-
-  ThrowingBool operator&&(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return dummy_ && other.dummy_;
-  }
-
-  ThrowingBool operator||(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return dummy_ || other.dummy_;
-  }
-
-  // Bitwise Logical Operators
-  ThrowingValue operator~() const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(~dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator&(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ & other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator|(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ | other.dummy_, nothrow_ctor);
-  }
-
-  ThrowingValue operator^(const ThrowingValue& other) const {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return ThrowingValue(dummy_ ^ other.dummy_, nothrow_ctor);
-  }
-
-  // Compound Assignment operators
-  ThrowingValue& operator+=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ += other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator-=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ -= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator*=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ *= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator/=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ /= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator%=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ %= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator&=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ &= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator|=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ |= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator^=(const ThrowingValue& other) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ ^= other.dummy_;
-    return *this;
-  }
-
-  ThrowingValue& operator<<=(int shift) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ <<= shift;
-    return *this;
-  }
-
-  ThrowingValue& operator>>=(int shift) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ >>= shift;
-    return *this;
-  }
-
-  // Pointer operators
-  void operator&() const = delete;  // NOLINT(runtime/operator)
-
-  // Stream operators
-  friend std::ostream& operator<<(std::ostream& os, const ThrowingValue& tv) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return os << GetInstanceString(tv.dummy_);
-  }
-
-  friend std::istream& operator>>(std::istream& is, const ThrowingValue&) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    return is;
-  }
-
-  // Memory management operators
-  // Args.. allows us to overload regular and placement new in one shot
-  template <typename... Args>
-  static void* operator new(size_t s, Args&&... args) noexcept(
-      IsSpecified(TypeSpec::kNoThrowNew)) {
-    if (!IsSpecified(TypeSpec::kNoThrowNew)) {
-      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION, true);
-    }
-    return ::operator new(s, std::forward<Args>(args)...);
-  }
-
-  template <typename... Args>
-  static void* operator new[](size_t s, Args&&... args) noexcept(
-      IsSpecified(TypeSpec::kNoThrowNew)) {
-    if (!IsSpecified(TypeSpec::kNoThrowNew)) {
-      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION, true);
-    }
-    return ::operator new[](s, std::forward<Args>(args)...);
-  }
-
-  // Abseil doesn't support throwing overloaded operator delete.  These are
-  // provided so a throwing operator-new can clean up after itself.
-  //
-  // We provide both regular and templated operator delete because if only the
-  // templated version is provided as we did with operator new, the compiler has
-  // no way of knowing which overload of operator delete to call. See
-  // https://en.cppreference.com/w/cpp/memory/new/operator_delete and
-  // https://en.cppreference.com/w/cpp/language/delete for the gory details.
-  void operator delete(void* p) noexcept { ::operator delete(p); }
-
-  template <typename... Args>
-  void operator delete(void* p, Args&&... args) noexcept {
-    ::operator delete(p, std::forward<Args>(args)...);
-  }
-
-  void operator delete[](void* p) noexcept { return ::operator delete[](p); }
-
-  template <typename... Args>
-  void operator delete[](void* p, Args&&... args) noexcept {
-    return ::operator delete[](p, std::forward<Args>(args)...);
-  }
-
-  // Non-standard access to the actual contained value.  No need for this to
-  // throw.
-  int& Get() noexcept { return dummy_; }
-  const int& Get() const noexcept { return dummy_; }
-
- private:
-  static std::string GetInstanceString(int dummy) {
-    return absl::StrCat("ThrowingValue<",
-                        exceptions_internal::GetSpecString(Spec), ">(", dummy,
-                        ")");
-  }
-
-  int dummy_;
-};
-// While not having to do with exceptions, explicitly delete comma operator, to
-// make sure we don't use it on user-supplied types.
-template <TypeSpec Spec, typename T>
-void operator,(const ThrowingValue<Spec>&, T&&) = delete;
-template <TypeSpec Spec, typename T>
-void operator,(T&&, const ThrowingValue<Spec>&) = delete;
-
-/*
- * Configuration enum for the ThrowingAllocator type that defines behavior for
- * the lifetime of the instance.
- *
- * kEverythingThrows: Calls to the member functions may throw
- * kNoThrowAllocate: Calls to the member functions will not throw
- */
-enum class AllocSpec {
-  kEverythingThrows = 0,
-  kNoThrowAllocate = 1,
-};
-
-/*
- * An allocator type which is instrumented to throw at a controlled time, or not
- * to throw, using AllocSpec. The supported settings are the default of every
- * function which is allowed to throw in a conforming allocator possibly
- * throwing, or nothing throws, in line with the ABSL_ALLOCATOR_THROWS
- * configuration macro.
- */
-template <typename T, AllocSpec Spec = AllocSpec::kEverythingThrows>
-class ThrowingAllocator : private exceptions_internal::TrackedObject {
-  static constexpr bool IsSpecified(AllocSpec spec) {
-    return static_cast<bool>(Spec & spec);
-  }
-
- public:
-  using pointer = T*;
-  using const_pointer = const T*;
-  using reference = T&;
-  using const_reference = const T&;
-  using void_pointer = void*;
-  using const_void_pointer = const void*;
-  using value_type = T;
-  using size_type = size_t;
-  using difference_type = ptrdiff_t;
-
-  using is_nothrow =
-      std::integral_constant<bool, Spec == AllocSpec::kNoThrowAllocate>;
-  using propagate_on_container_copy_assignment = std::true_type;
-  using propagate_on_container_move_assignment = std::true_type;
-  using propagate_on_container_swap = std::true_type;
-  using is_always_equal = std::false_type;
-
-  ThrowingAllocator() : TrackedObject(GetInstanceString(next_id_)) {
-    exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
-    dummy_ = std::make_shared<const int>(next_id_++);
-  }
-
-  template <typename U>
-  ThrowingAllocator(const ThrowingAllocator<U, Spec>& other) noexcept  // NOLINT
-      : TrackedObject(GetInstanceString(*other.State())),
-        dummy_(other.State()) {}
-
-  // According to C++11 standard [17.6.3.5], Table 28, the move/copy ctors of
-  // allocator shall not exit via an exception, thus they are marked noexcept.
-  ThrowingAllocator(const ThrowingAllocator& other) noexcept
-      : TrackedObject(GetInstanceString(*other.State())),
-        dummy_(other.State()) {}
-
-  template <typename U>
-  ThrowingAllocator(ThrowingAllocator<U, Spec>&& other) noexcept  // NOLINT
-      : TrackedObject(GetInstanceString(*other.State())),
-        dummy_(std::move(other.State())) {}
-
-  ThrowingAllocator(ThrowingAllocator&& other) noexcept
-      : TrackedObject(GetInstanceString(*other.State())),
-        dummy_(std::move(other.State())) {}
-
-  ~ThrowingAllocator() noexcept = default;
-
-  ThrowingAllocator& operator=(const ThrowingAllocator& other) noexcept {
-    dummy_ = other.State();
-    return *this;
-  }
-
-  template <typename U>
-  ThrowingAllocator& operator=(
-      const ThrowingAllocator<U, Spec>& other) noexcept {
-    dummy_ = other.State();
-    return *this;
-  }
-
-  template <typename U>
-  ThrowingAllocator& operator=(ThrowingAllocator<U, Spec>&& other) noexcept {
-    dummy_ = std::move(other.State());
-    return *this;
-  }
-
-  template <typename U>
-  struct rebind {
-    using other = ThrowingAllocator<U, Spec>;
-  };
-
-  pointer allocate(size_type n) noexcept(
-      IsSpecified(AllocSpec::kNoThrowAllocate)) {
-    ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION);
-    return static_cast<pointer>(::operator new(n * sizeof(T)));
-  }
-
-  pointer allocate(size_type n, const_void_pointer) noexcept(
-      IsSpecified(AllocSpec::kNoThrowAllocate)) {
-    return allocate(n);
-  }
-
-  void deallocate(pointer ptr, size_type) noexcept {
-    ReadState();
-    ::operator delete(static_cast<void*>(ptr));
-  }
-
-  template <typename U, typename... Args>
-  void construct(U* ptr, Args&&... args) noexcept(
-      IsSpecified(AllocSpec::kNoThrowAllocate)) {
-    ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION);
-    ::new (static_cast<void*>(ptr)) U(std::forward<Args>(args)...);
-  }
-
-  template <typename U>
-  void destroy(U* p) noexcept {
-    ReadState();
-    p->~U();
-  }
-
-  size_type max_size() const noexcept {
-    return (std::numeric_limits<difference_type>::max)() / sizeof(value_type);
-  }
-
-  ThrowingAllocator select_on_container_copy_construction() noexcept(
-      IsSpecified(AllocSpec::kNoThrowAllocate)) {
-    auto& out = *this;
-    ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION);
-    return out;
-  }
-
-  template <typename U>
-  bool operator==(const ThrowingAllocator<U, Spec>& other) const noexcept {
-    return dummy_ == other.dummy_;
-  }
-
-  template <typename U>
-  bool operator!=(const ThrowingAllocator<U, Spec>& other) const noexcept {
-    return dummy_ != other.dummy_;
-  }
-
-  template <typename, AllocSpec>
-  friend class ThrowingAllocator;
-
- private:
-  static std::string GetInstanceString(int dummy) {
-    return absl::StrCat("ThrowingAllocator<",
-                        exceptions_internal::GetSpecString(Spec), ">(", dummy,
-                        ")");
-  }
-
-  const std::shared_ptr<const int>& State() const { return dummy_; }
-  std::shared_ptr<const int>& State() { return dummy_; }
-
-  void ReadState() {
-    // we know that this will never be true, but the compiler doesn't, so this
-    // should safely force a read of the value.
-    if (*dummy_ < 0) std::abort();
-  }
-
-  void ReadStateAndMaybeThrow(absl::string_view msg) const {
-    if (!IsSpecified(AllocSpec::kNoThrowAllocate)) {
-      exceptions_internal::MaybeThrow(
-          absl::Substitute("Allocator id $0 threw from $1", *dummy_, msg));
-    }
-  }
-
-  static int next_id_;
-  std::shared_ptr<const int> dummy_;
-};
-
-template <typename T, AllocSpec Spec>
-int ThrowingAllocator<T, Spec>::next_id_ = 0;
-
-// Tests for resource leaks by attempting to construct a T using args repeatedly
-// until successful, using the countdown method.  Side effects can then be
-// tested for resource leaks.
-template <typename T, typename... Args>
-void TestThrowingCtor(Args&&... args) {
-  struct Cleanup {
-    ~Cleanup() { exceptions_internal::UnsetCountdown(); }
-  } c;
-  for (int count = 0;; ++count) {
-    exceptions_internal::ConstructorTracker ct(count);
-    exceptions_internal::SetCountdown(count);
-    try {
-      T temp(std::forward<Args>(args)...);
-      static_cast<void>(temp);
-      break;
-    } catch (const exceptions_internal::TestException&) {
-    }
-  }
-}
-
-// Tests the nothrow guarantee of the provided nullary operation. If the an
-// exception is thrown, the result will be AssertionFailure(). Otherwise, it
-// will be AssertionSuccess().
-template <typename Operation>
-testing::AssertionResult TestNothrowOp(const Operation& operation) {
-  struct Cleanup {
-    Cleanup() { exceptions_internal::SetCountdown(); }
-    ~Cleanup() { exceptions_internal::UnsetCountdown(); }
-  } c;
-  try {
-    operation();
-    return testing::AssertionSuccess();
-  } catch (const exceptions_internal::TestException&) {
-    return testing::AssertionFailure()
-           << "TestException thrown during call to operation() when nothrow "
-              "guarantee was expected.";
-  } catch (...) {
-    return testing::AssertionFailure()
-           << "Unknown exception thrown during call to operation() when "
-              "nothrow guarantee was expected.";
-  }
-}
-
-namespace exceptions_internal {
-
-// Dummy struct for ExceptionSafetyTestBuilder<> partial state.
-struct UninitializedT {};
-
-template <typename T>
-class DefaultFactory {
- public:
-  explicit DefaultFactory(const T& t) : t_(t) {}
-  std::unique_ptr<T> operator()() const { return absl::make_unique<T>(t_); }
-
- private:
-  T t_;
-};
-
-template <size_t LazyContractsCount, typename LazyFactory,
-          typename LazyOperation>
-using EnableIfTestable = typename absl::enable_if_t<
-    LazyContractsCount != 0 &&
-    !std::is_same<LazyFactory, UninitializedT>::value &&
-    !std::is_same<LazyOperation, UninitializedT>::value>;
-
-template <typename Factory = UninitializedT,
-          typename Operation = UninitializedT, typename... Contracts>
-class ExceptionSafetyTestBuilder;
-
-}  // namespace exceptions_internal
-
-/*
- * Constructs an empty ExceptionSafetyTestBuilder. All
- * ExceptionSafetyTestBuilder objects are immutable and all With[thing] mutation
- * methods return new instances of ExceptionSafetyTestBuilder.
- *
- * In order to test a T for exception safety, a factory for that T, a testable
- * operation, and at least one contract callback returning an assertion
- * result must be applied using the respective methods.
- */
-exceptions_internal::ExceptionSafetyTestBuilder<> MakeExceptionSafetyTester();
-
-namespace exceptions_internal {
-template <typename T>
-struct IsUniquePtr : std::false_type {};
-
-template <typename T, typename D>
-struct IsUniquePtr<std::unique_ptr<T, D>> : std::true_type {};
-
-template <typename Factory>
-struct FactoryPtrTypeHelper {
-  using type = decltype(std::declval<const Factory&>()());
-
-  static_assert(IsUniquePtr<type>::value, "Factories must return a unique_ptr");
-};
-
-template <typename Factory>
-using FactoryPtrType = typename FactoryPtrTypeHelper<Factory>::type;
-
-template <typename Factory>
-using FactoryElementType = typename FactoryPtrType<Factory>::element_type;
-
-template <typename T>
-class ExceptionSafetyTest {
-  using Factory = std::function<std::unique_ptr<T>()>;
-  using Operation = std::function<void(T*)>;
-  using Contract = std::function<AssertionResult(T*)>;
-
- public:
-  template <typename... Contracts>
-  explicit ExceptionSafetyTest(const Factory& f, const Operation& op,
-                               const Contracts&... contracts)
-      : factory_(f), operation_(op), contracts_{WrapContract(contracts)...} {}
-
-  AssertionResult Test() const {
-    for (int count = 0;; ++count) {
-      exceptions_internal::ConstructorTracker ct(count);
-
-      for (const auto& contract : contracts_) {
-        auto t_ptr = factory_();
-        try {
-          SetCountdown(count);
-          operation_(t_ptr.get());
-          // Unset for the case that the operation throws no exceptions, which
-          // would leave the countdown set and break the *next* exception safety
-          // test after this one.
-          UnsetCountdown();
-          return AssertionSuccess();
-        } catch (const exceptions_internal::TestException& e) {
-          if (!contract(t_ptr.get())) {
-            return AssertionFailure() << e.what() << " failed contract check";
-          }
-        }
-      }
-    }
-  }
-
- private:
-  template <typename ContractFn>
-  Contract WrapContract(const ContractFn& contract) {
-    return [contract](T* t_ptr) { return AssertionResult(contract(t_ptr)); };
-  }
-
-  Contract WrapContract(StrongGuaranteeTagType) {
-    return [this](T* t_ptr) { return AssertionResult(*factory_() == *t_ptr); };
-  }
-
-  Factory factory_;
-  Operation operation_;
-  std::vector<Contract> contracts_;
-};
-
-/*
- * Builds a tester object that tests if performing a operation on a T follows
- * exception safety guarantees. Verification is done via contract assertion
- * callbacks applied to T instances post-throw.
- *
- * Template parameters for ExceptionSafetyTestBuilder:
- *
- * - Factory: The factory object (passed in via tester.WithFactory(...) or
- *   tester.WithInitialValue(...)) must be invocable with the signature
- *   `std::unique_ptr<T> operator()() const` where T is the type being tested.
- *   It is used for reliably creating identical T instances to test on.
- *
- * - Operation: The operation object (passsed in via tester.WithOperation(...)
- *   or tester.Test(...)) must be invocable with the signature
- *   `void operator()(T*) const` where T is the type being tested. It is used
- *   for performing steps on a T instance that may throw and that need to be
- *   checked for exception safety. Each call to the operation will receive a
- *   fresh T instance so it's free to modify and destroy the T instances as it
- *   pleases.
- *
- * - Contracts...: The contract assertion callback objects (passed in via
- *   tester.WithContracts(...)) must be invocable with the signature
- *   `testing::AssertionResult operator()(T*) const` where T is the type being
- *   tested. Contract assertion callbacks are provided T instances post-throw.
- *   They must return testing::AssertionSuccess when the type contracts of the
- *   provided T instance hold. If the type contracts of the T instance do not
- *   hold, they must return testing::AssertionFailure. Execution order of
- *   Contracts... is unspecified. They will each individually get a fresh T
- *   instance so they are free to modify and destroy the T instances as they
- *   please.
- */
-template <typename Factory, typename Operation, typename... Contracts>
-class ExceptionSafetyTestBuilder {
- public:
-  /*
-   * Returns a new ExceptionSafetyTestBuilder with an included T factory based
-   * on the provided T instance. The existing factory will not be included in
-   * the newly created tester instance. The created factory returns a new T
-   * instance by copy-constructing the provided const T& t.
-   *
-   * Preconditions for tester.WithInitialValue(const T& t):
-   *
-   * - The const T& t object must be copy-constructible where T is the type
-   *   being tested. For non-copy-constructible objects, use the method
-   *   tester.WithFactory(...).
-   */
-  template <typename T>
-  ExceptionSafetyTestBuilder<DefaultFactory<T>, Operation, Contracts...>
-  WithInitialValue(const T& t) const {
-    return WithFactory(DefaultFactory<T>(t));
-  }
-
-  /*
-   * Returns a new ExceptionSafetyTestBuilder with the provided T factory
-   * included. The existing factory will not be included in the newly-created
-   * tester instance. This method is intended for use with types lacking a copy
-   * constructor. Types that can be copy-constructed should instead use the
-   * method tester.WithInitialValue(...).
-   */
-  template <typename NewFactory>
-  ExceptionSafetyTestBuilder<absl::decay_t<NewFactory>, Operation, Contracts...>
-  WithFactory(const NewFactory& new_factory) const {
-    return {new_factory, operation_, contracts_};
-  }
-
-  /*
-   * Returns a new ExceptionSafetyTestBuilder with the provided testable
-   * operation included. The existing operation will not be included in the
-   * newly created tester.
-   */
-  template <typename NewOperation>
-  ExceptionSafetyTestBuilder<Factory, absl::decay_t<NewOperation>, Contracts...>
-  WithOperation(const NewOperation& new_operation) const {
-    return {factory_, new_operation, contracts_};
-  }
-
-  /*
-   * Returns a new ExceptionSafetyTestBuilder with the provided MoreContracts...
-   * combined with the Contracts... that were already included in the instance
-   * on which the method was called. Contracts... cannot be removed or replaced
-   * once added to an ExceptionSafetyTestBuilder instance. A fresh object must
-   * be created in order to get an empty Contracts... list.
-   *
-   * In addition to passing in custom contract assertion callbacks, this method
-   * accepts `testing::strong_guarantee` as an argument which checks T instances
-   * post-throw against freshly created T instances via operator== to verify
-   * that any state changes made during the execution of the operation were
-   * properly rolled back.
-   */
-  template <typename... MoreContracts>
-  ExceptionSafetyTestBuilder<Factory, Operation, Contracts...,
-                             absl::decay_t<MoreContracts>...>
-  WithContracts(const MoreContracts&... more_contracts) const {
-    return {
-        factory_, operation_,
-        std::tuple_cat(contracts_, std::tuple<absl::decay_t<MoreContracts>...>(
-                                       more_contracts...))};
-  }
-
-  /*
-   * Returns a testing::AssertionResult that is the reduced result of the
-   * exception safety algorithm. The algorithm short circuits and returns
-   * AssertionFailure after the first contract callback returns an
-   * AssertionFailure. Otherwise, if all contract callbacks return an
-   * AssertionSuccess, the reduced result is AssertionSuccess.
-   *
-   * The passed-in testable operation will not be saved in a new tester instance
-   * nor will it modify/replace the existing tester instance. This is useful
-   * when each operation being tested is unique and does not need to be reused.
-   *
-   * Preconditions for tester.Test(const NewOperation& new_operation):
-   *
-   * - May only be called after at least one contract assertion callback and a
-   *   factory or initial value have been provided.
-   */
-  template <
-      typename NewOperation,
-      typename = EnableIfTestable<sizeof...(Contracts), Factory, NewOperation>>
-  testing::AssertionResult Test(const NewOperation& new_operation) const {
-    return TestImpl(new_operation, absl::index_sequence_for<Contracts...>());
-  }
-
-  /*
-   * Returns a testing::AssertionResult that is the reduced result of the
-   * exception safety algorithm. The algorithm short circuits and returns
-   * AssertionFailure after the first contract callback returns an
-   * AssertionFailure. Otherwise, if all contract callbacks return an
-   * AssertionSuccess, the reduced result is AssertionSuccess.
-   *
-   * Preconditions for tester.Test():
-   *
-   * - May only be called after at least one contract assertion callback, a
-   *   factory or initial value and a testable operation have been provided.
-   */
-  template <
-      typename LazyOperation = Operation,
-      typename = EnableIfTestable<sizeof...(Contracts), Factory, LazyOperation>>
-  testing::AssertionResult Test() const {
-    return Test(operation_);
-  }
-
- private:
-  template <typename, typename, typename...>
-  friend class ExceptionSafetyTestBuilder;
-
-  friend ExceptionSafetyTestBuilder<> testing::MakeExceptionSafetyTester();
-
-  ExceptionSafetyTestBuilder() {}
-
-  ExceptionSafetyTestBuilder(const Factory& f, const Operation& o,
-                             const std::tuple<Contracts...>& i)
-      : factory_(f), operation_(o), contracts_(i) {}
-
-  template <typename SelectedOperation, size_t... Indices>
-  testing::AssertionResult TestImpl(SelectedOperation selected_operation,
-                                    absl::index_sequence<Indices...>) const {
-    return ExceptionSafetyTest<FactoryElementType<Factory>>(
-               factory_, selected_operation, std::get<Indices>(contracts_)...)
-        .Test();
-  }
-
-  Factory factory_;
-  Operation operation_;
-  std::tuple<Contracts...> contracts_;
-};
-
-}  // namespace exceptions_internal
-
-}  // namespace testing
-
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-#endif  // ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_
diff --git a/third_party/abseil/absl/base/internal/exception_testing.h b/third_party/abseil/absl/base/internal/exception_testing.h
deleted file mode 100644
index 01b5465..0000000
--- a/third_party/abseil/absl/base/internal/exception_testing.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Testing utilities for ABSL types which throw exceptions.
-
-#ifndef ABSL_BASE_INTERNAL_EXCEPTION_TESTING_H_
-#define ABSL_BASE_INTERNAL_EXCEPTION_TESTING_H_
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-
-// ABSL_BASE_INTERNAL_EXPECT_FAIL tests either for a specified thrown exception
-// if exceptions are enabled, or for death with a specified text in the error
-// message
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#define ABSL_BASE_INTERNAL_EXPECT_FAIL(expr, exception_t, text) \
-  EXPECT_THROW(expr, exception_t)
-
-#elif defined(__ANDROID__)
-// Android asserts do not log anywhere that gtest can currently inspect.
-// So we expect exit, but cannot match the message.
-#define ABSL_BASE_INTERNAL_EXPECT_FAIL(expr, exception_t, text) \
-  EXPECT_DEATH(expr, ".*")
-#else
-#define ABSL_BASE_INTERNAL_EXPECT_FAIL(expr, exception_t, text) \
-  EXPECT_DEATH_IF_SUPPORTED(expr, text)
-
-#endif
-
-#endif  // ABSL_BASE_INTERNAL_EXCEPTION_TESTING_H_
diff --git a/third_party/abseil/absl/base/internal/exponential_biased.cc b/third_party/abseil/absl/base/internal/exponential_biased.cc
deleted file mode 100644
index 1b30c06..0000000
--- a/third_party/abseil/absl/base/internal/exponential_biased.cc
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/exponential_biased.h"
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <atomic>
-#include <cmath>
-#include <limits>
-
-#include "absl/base/attributes.h"
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// The algorithm generates a random number between 0 and 1 and applies the
-// inverse cumulative distribution function for an exponential. Specifically:
-// Let m be the inverse of the sample period, then the probability
-// distribution function is m*exp(-mx) so the CDF is
-// p = 1 - exp(-mx), so
-// q = 1 - p = exp(-mx)
-// log_e(q) = -mx
-// -log_e(q)/m = x
-// log_2(q) * (-log_e(2) * 1/m) = x
-// In the code, q is actually in the range 1 to 2**26, hence the -26 below
-int64_t ExponentialBiased::GetSkipCount(int64_t mean) {
-  if (ABSL_PREDICT_FALSE(!initialized_)) {
-    Initialize();
-  }
-
-  uint64_t rng = NextRandom(rng_);
-  rng_ = rng;
-
-  // Take the top 26 bits as the random number
-  // (This plus the 1<<58 sampling bound give a max possible step of
-  // 5194297183973780480 bytes.)
-  // The uint32_t cast is to prevent a (hard-to-reproduce) NAN
-  // under piii debug for some binaries.
-  double q = static_cast<uint32_t>(rng >> (kPrngNumBits - 26)) + 1.0;
-  // Put the computed p-value through the CDF of a geometric.
-  double interval = bias_ + (std::log2(q) - 26) * (-std::log(2.0) * mean);
-  // Very large values of interval overflow int64_t. To avoid that, we will
-  // cheat and clamp any huge values to (int64_t max)/2. This is a potential
-  // source of bias, but the mean would need to be such a large value that it's
-  // not likely to come up. For example, with a mean of 1e18, the probability of
-  // hitting this condition is about 1/1000. For a mean of 1e17, standard
-  // calculators claim that this event won't happen.
-  if (interval > static_cast<double>(std::numeric_limits<int64_t>::max() / 2)) {
-    // Assume huge values are bias neutral, retain bias for next call.
-    return std::numeric_limits<int64_t>::max() / 2;
-  }
-  double value = std::round(interval);
-  bias_ = interval - value;
-  return value;
-}
-
-int64_t ExponentialBiased::GetStride(int64_t mean) {
-  return GetSkipCount(mean - 1) + 1;
-}
-
-void ExponentialBiased::Initialize() {
-  // We don't get well distributed numbers from `this` so we call NextRandom() a
-  // bunch to mush the bits around. We use a global_rand to handle the case
-  // where the same thread (by memory address) gets created and destroyed
-  // repeatedly.
-  ABSL_CONST_INIT static std::atomic<uint32_t> global_rand(0);
-  uint64_t r = reinterpret_cast<uint64_t>(this) +
-               global_rand.fetch_add(1, std::memory_order_relaxed);
-  for (int i = 0; i < 20; ++i) {
-    r = NextRandom(r);
-  }
-  rng_ = r;
-  initialized_ = true;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/exponential_biased.h b/third_party/abseil/absl/base/internal/exponential_biased.h
deleted file mode 100644
index 94f79a3..0000000
--- a/third_party/abseil/absl/base/internal/exponential_biased.h
+++ /dev/null
@@ -1,130 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_EXPONENTIAL_BIASED_H_
-#define ABSL_BASE_INTERNAL_EXPONENTIAL_BIASED_H_
-
-#include <stdint.h>
-
-#include "absl/base/config.h"
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// ExponentialBiased provides a small and fast random number generator for a
-// rounded exponential distribution. This generator manages very little state,
-// and imposes no synchronization overhead. This makes it useful in specialized
-// scenarios requiring minimum overhead, such as stride based periodic sampling.
-//
-// ExponentialBiased provides two closely related functions, GetSkipCount() and
-// GetStride(), both returning a rounded integer defining a number of events
-// required before some event with a given mean probability occurs.
-//
-// The distribution is useful to generate a random wait time or some periodic
-// event with a given mean probability. For example, if an action is supposed to
-// happen on average once every 'N' events, then we can get a random 'stride'
-// counting down how long before the event to happen. For example, if we'd want
-// to sample one in every 1000 'Frobber' calls, our code could look like this:
-//
-//   Frobber::Frobber() {
-//     stride_ = exponential_biased_.GetStride(1000);
-//   }
-//
-//   void Frobber::Frob(int arg) {
-//     if (--stride == 0) {
-//       SampleFrob(arg);
-//       stride_ = exponential_biased_.GetStride(1000);
-//     }
-//     ...
-//   }
-//
-// The rounding of the return value creates a bias, especially for smaller means
-// where the distribution of the fraction is not evenly distributed. We correct
-// this bias by tracking the fraction we rounded up or down on each iteration,
-// effectively tracking the distance between the cumulative value, and the
-// rounded cumulative value. For example, given a mean of 2:
-//
-//   raw = 1.63076, cumulative = 1.63076, rounded = 2, bias = -0.36923
-//   raw = 0.14624, cumulative = 1.77701, rounded = 2, bias =  0.14624
-//   raw = 4.93194, cumulative = 6.70895, rounded = 7, bias = -0.06805
-//   raw = 0.24206, cumulative = 6.95101, rounded = 7, bias =  0.24206
-//   etc...
-//
-// Adjusting with rounding bias is relatively trivial:
-//
-//    double value = bias_ + exponential_distribution(mean)();
-//    double rounded_value = std::round(value);
-//    bias_ = value - rounded_value;
-//    return rounded_value;
-//
-// This class is thread-compatible.
-class ExponentialBiased {
- public:
-  // The number of bits set by NextRandom.
-  static constexpr int kPrngNumBits = 48;
-
-  // `GetSkipCount()` returns the number of events to skip before some chosen
-  // event happens. For example, randomly tossing a coin, we will on average
-  // throw heads once before we get tails. We can simulate random coin tosses
-  // using GetSkipCount() as:
-  //
-  //   ExponentialBiased eb;
-  //   for (...) {
-  //     int number_of_heads_before_tail = eb.GetSkipCount(1);
-  //     for (int flips = 0; flips < number_of_heads_before_tail; ++flips) {
-  //       printf("head...");
-  //     }
-  //     printf("tail\n");
-  //   }
-  //
-  int64_t GetSkipCount(int64_t mean);
-
-  // GetStride() returns the number of events required for a specific event to
-  // happen. See the class comments for a usage example. `GetStride()` is
-  // equivalent to `GetSkipCount(mean - 1) + 1`. When to use `GetStride()` or
-  // `GetSkipCount()` depends mostly on what best fits the use case.
-  int64_t GetStride(int64_t mean);
-
-  // Computes a random number in the range [0, 1<<(kPrngNumBits+1) - 1]
-  //
-  // This is public to enable testing.
-  static uint64_t NextRandom(uint64_t rnd);
-
- private:
-  void Initialize();
-
-  uint64_t rng_{0};
-  double bias_{0};
-  bool initialized_{false};
-};
-
-// Returns the next prng value.
-// pRNG is: aX+b mod c with a = 0x5DEECE66D, b =  0xB, c = 1<<48
-// This is the lrand64 generator.
-inline uint64_t ExponentialBiased::NextRandom(uint64_t rnd) {
-  const uint64_t prng_mult = uint64_t{0x5DEECE66D};
-  const uint64_t prng_add = 0xB;
-  const uint64_t prng_mod_power = 48;
-  const uint64_t prng_mod_mask =
-      ~((~static_cast<uint64_t>(0)) << prng_mod_power);
-  return (prng_mult * rnd + prng_add) & prng_mod_mask;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_EXPONENTIAL_BIASED_H_
diff --git a/third_party/abseil/absl/base/internal/exponential_biased_test.cc b/third_party/abseil/absl/base/internal/exponential_biased_test.cc
deleted file mode 100644
index 075583c..0000000
--- a/third_party/abseil/absl/base/internal/exponential_biased_test.cc
+++ /dev/null
@@ -1,199 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/exponential_biased.h"
-
-#include <stddef.h>
-
-#include <cmath>
-#include <cstdint>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/str_cat.h"
-
-using ::testing::Ge;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-MATCHER_P2(IsBetween, a, b,
-           absl::StrCat(std::string(negation ? "isn't" : "is"), " between ", a,
-                        " and ", b)) {
-  return a <= arg && arg <= b;
-}
-
-// Tests of the quality of the random numbers generated
-// This uses the Anderson Darling test for uniformity.
-// See "Evaluating the Anderson-Darling Distribution" by Marsaglia
-// for details.
-
-// Short cut version of ADinf(z), z>0 (from Marsaglia)
-// This returns the p-value for Anderson Darling statistic in
-// the limit as n-> infinity. For finite n, apply the error fix below.
-double AndersonDarlingInf(double z) {
-  if (z < 2) {
-    return exp(-1.2337141 / z) / sqrt(z) *
-           (2.00012 +
-            (0.247105 -
-             (0.0649821 - (0.0347962 - (0.011672 - 0.00168691 * z) * z) * z) *
-                 z) *
-                z);
-  }
-  return exp(
-      -exp(1.0776 -
-           (2.30695 -
-            (0.43424 - (0.082433 - (0.008056 - 0.0003146 * z) * z) * z) * z) *
-               z));
-}
-
-// Corrects the approximation error in AndersonDarlingInf for small values of n
-// Add this to AndersonDarlingInf to get a better approximation
-// (from Marsaglia)
-double AndersonDarlingErrFix(int n, double x) {
-  if (x > 0.8) {
-    return (-130.2137 +
-            (745.2337 -
-             (1705.091 - (1950.646 - (1116.360 - 255.7844 * x) * x) * x) * x) *
-                x) /
-           n;
-  }
-  double cutoff = 0.01265 + 0.1757 / n;
-  if (x < cutoff) {
-    double t = x / cutoff;
-    t = sqrt(t) * (1 - t) * (49 * t - 102);
-    return t * (0.0037 / (n * n) + 0.00078 / n + 0.00006) / n;
-  } else {
-    double t = (x - cutoff) / (0.8 - cutoff);
-    t = -0.00022633 +
-        (6.54034 - (14.6538 - (14.458 - (8.259 - 1.91864 * t) * t) * t) * t) *
-            t;
-    return t * (0.04213 + 0.01365 / n) / n;
-  }
-}
-
-// Returns the AndersonDarling p-value given n and the value of the statistic
-double AndersonDarlingPValue(int n, double z) {
-  double ad = AndersonDarlingInf(z);
-  double errfix = AndersonDarlingErrFix(n, ad);
-  return ad + errfix;
-}
-
-double AndersonDarlingStatistic(const std::vector<double>& random_sample) {
-  int n = random_sample.size();
-  double ad_sum = 0;
-  for (int i = 0; i < n; i++) {
-    ad_sum += (2 * i + 1) *
-              std::log(random_sample[i] * (1 - random_sample[n - 1 - i]));
-  }
-  double ad_statistic = -n - 1 / static_cast<double>(n) * ad_sum;
-  return ad_statistic;
-}
-
-// Tests if the array of doubles is uniformly distributed.
-// Returns the p-value of the Anderson Darling Statistic
-// for the given set of sorted random doubles
-// See "Evaluating the Anderson-Darling Distribution" by
-// Marsaglia and Marsaglia for details.
-double AndersonDarlingTest(const std::vector<double>& random_sample) {
-  double ad_statistic = AndersonDarlingStatistic(random_sample);
-  double p = AndersonDarlingPValue(random_sample.size(), ad_statistic);
-  return p;
-}
-
-TEST(ExponentialBiasedTest, CoinTossDemoWithGetSkipCount) {
-  ExponentialBiased eb;
-  for (int runs = 0; runs < 10; ++runs) {
-    for (int flips = eb.GetSkipCount(1); flips > 0; --flips) {
-      printf("head...");
-    }
-    printf("tail\n");
-  }
-  int heads = 0;
-  for (int i = 0; i < 10000000; i += 1 + eb.GetSkipCount(1)) {
-    ++heads;
-  }
-  printf("Heads = %d (%f%%)\n", heads, 100.0 * heads / 10000000);
-}
-
-TEST(ExponentialBiasedTest, SampleDemoWithStride) {
-  ExponentialBiased eb;
-  int stride = eb.GetStride(10);
-  int samples = 0;
-  for (int i = 0; i < 10000000; ++i) {
-    if (--stride == 0) {
-      ++samples;
-      stride = eb.GetStride(10);
-    }
-  }
-  printf("Samples = %d (%f%%)\n", samples, 100.0 * samples / 10000000);
-}
-
-
-// Testing that NextRandom generates uniform random numbers. Applies the
-// Anderson-Darling test for uniformity
-TEST(ExponentialBiasedTest, TestNextRandom) {
-  for (auto n : std::vector<int>({
-           10,  // Check short-range correlation
-           100, 1000,
-           10000  // Make sure there's no systemic error
-       })) {
-    uint64_t x = 1;
-    // This assumes that the prng returns 48 bit numbers
-    uint64_t max_prng_value = static_cast<uint64_t>(1) << 48;
-    // Initialize.
-    for (int i = 1; i <= 20; i++) {
-      x = ExponentialBiased::NextRandom(x);
-    }
-    std::vector<uint64_t> int_random_sample(n);
-    // Collect samples
-    for (int i = 0; i < n; i++) {
-      int_random_sample[i] = x;
-      x = ExponentialBiased::NextRandom(x);
-    }
-    // First sort them...
-    std::sort(int_random_sample.begin(), int_random_sample.end());
-    std::vector<double> random_sample(n);
-    // Convert them to uniform randoms (in the range [0,1])
-    for (int i = 0; i < n; i++) {
-      random_sample[i] =
-          static_cast<double>(int_random_sample[i]) / max_prng_value;
-    }
-    // Now compute the Anderson-Darling statistic
-    double ad_pvalue = AndersonDarlingTest(random_sample);
-    EXPECT_GT(std::min(ad_pvalue, 1 - ad_pvalue), 0.0001)
-        << "prng is not uniform: n = " << n << " p = " << ad_pvalue;
-  }
-}
-
-// The generator needs to be available as a thread_local and as a static
-// variable.
-TEST(ExponentialBiasedTest, InitializationModes) {
-  ABSL_CONST_INIT static ExponentialBiased eb_static;
-  EXPECT_THAT(eb_static.GetSkipCount(2), Ge(0));
-
-#ifdef ABSL_HAVE_THREAD_LOCAL
-  thread_local ExponentialBiased eb_thread;
-  EXPECT_THAT(eb_thread.GetSkipCount(2), Ge(0));
-#endif
-
-  ExponentialBiased eb_stack;
-  EXPECT_THAT(eb_stack.GetSkipCount(2), Ge(0));
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/fast_type_id.h b/third_party/abseil/absl/base/internal/fast_type_id.h
deleted file mode 100644
index 3db59e8..0000000
--- a/third_party/abseil/absl/base/internal/fast_type_id.h
+++ /dev/null
@@ -1,48 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_FAST_TYPE_ID_H_
-#define ABSL_BASE_INTERNAL_FAST_TYPE_ID_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-template <typename Type>
-struct FastTypeTag {
-  constexpr static char dummy_var = 0;
-};
-
-template <typename Type>
-constexpr char FastTypeTag<Type>::dummy_var;
-
-// FastTypeId<Type>() evaluates at compile/link-time to a unique pointer for the
-// passed-in type. These are meant to be good match for keys into maps or
-// straight up comparisons.
-using FastTypeIdType = const void*;
-
-template <typename Type>
-constexpr inline FastTypeIdType FastTypeId() {
-  return &FastTypeTag<Type>::dummy_var;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_FAST_TYPE_ID_H_
diff --git a/third_party/abseil/absl/base/internal/fast_type_id_test.cc b/third_party/abseil/absl/base/internal/fast_type_id_test.cc
deleted file mode 100644
index 16f3c14..0000000
--- a/third_party/abseil/absl/base/internal/fast_type_id_test.cc
+++ /dev/null
@@ -1,123 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/fast_type_id.h"
-
-#include <cstdint>
-#include <map>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-namespace {
-namespace bi = absl::base_internal;
-
-// NOLINTNEXTLINE
-#define PRIM_TYPES(A)   \
-  A(bool)               \
-  A(short)              \
-  A(unsigned short)     \
-  A(int)                \
-  A(unsigned int)       \
-  A(long)               \
-  A(unsigned long)      \
-  A(long long)          \
-  A(unsigned long long) \
-  A(float)              \
-  A(double)             \
-  A(long double)
-
-TEST(FastTypeIdTest, PrimitiveTypes) {
-  bi::FastTypeIdType type_ids[] = {
-#define A(T) bi::FastTypeId<T>(),
-    PRIM_TYPES(A)
-#undef A
-#define A(T) bi::FastTypeId<const T>(),
-    PRIM_TYPES(A)
-#undef A
-#define A(T) bi::FastTypeId<volatile T>(),
-    PRIM_TYPES(A)
-#undef A
-#define A(T) bi::FastTypeId<const volatile T>(),
-    PRIM_TYPES(A)
-#undef A
-  };
-  size_t total_type_ids = sizeof(type_ids) / sizeof(bi::FastTypeIdType);
-
-  for (int i = 0; i < total_type_ids; ++i) {
-    EXPECT_EQ(type_ids[i], type_ids[i]);
-    for (int j = 0; j < i; ++j) {
-      EXPECT_NE(type_ids[i], type_ids[j]);
-    }
-  }
-}
-
-#define FIXED_WIDTH_TYPES(A) \
-  A(int8_t)                  \
-  A(uint8_t)                 \
-  A(int16_t)                 \
-  A(uint16_t)                \
-  A(int32_t)                 \
-  A(uint32_t)                \
-  A(int64_t)                 \
-  A(uint64_t)
-
-TEST(FastTypeIdTest, FixedWidthTypes) {
-  bi::FastTypeIdType type_ids[] = {
-#define A(T) bi::FastTypeId<T>(),
-    FIXED_WIDTH_TYPES(A)
-#undef A
-#define A(T) bi::FastTypeId<const T>(),
-    FIXED_WIDTH_TYPES(A)
-#undef A
-#define A(T) bi::FastTypeId<volatile T>(),
-    FIXED_WIDTH_TYPES(A)
-#undef A
-#define A(T) bi::FastTypeId<const volatile T>(),
-    FIXED_WIDTH_TYPES(A)
-#undef A
-  };
-  size_t total_type_ids = sizeof(type_ids) / sizeof(bi::FastTypeIdType);
-
-  for (int i = 0; i < total_type_ids; ++i) {
-    EXPECT_EQ(type_ids[i], type_ids[i]);
-    for (int j = 0; j < i; ++j) {
-      EXPECT_NE(type_ids[i], type_ids[j]);
-    }
-  }
-}
-
-TEST(FastTypeIdTest, AliasTypes) {
-  using int_alias = int;
-  EXPECT_EQ(bi::FastTypeId<int_alias>(), bi::FastTypeId<int>());
-}
-
-TEST(FastTypeIdTest, TemplateSpecializations) {
-  EXPECT_NE(bi::FastTypeId<std::vector<int>>(),
-            bi::FastTypeId<std::vector<long>>());
-
-  EXPECT_NE((bi::FastTypeId<std::map<int, float>>()),
-            (bi::FastTypeId<std::map<int, double>>()));
-}
-
-struct Base {};
-struct Derived : Base {};
-struct PDerived : private Base {};
-
-TEST(FastTypeIdTest, Inheritance) {
-  EXPECT_NE(bi::FastTypeId<Base>(), bi::FastTypeId<Derived>());
-  EXPECT_NE(bi::FastTypeId<Base>(), bi::FastTypeId<PDerived>());
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/hide_ptr.h b/third_party/abseil/absl/base/internal/hide_ptr.h
deleted file mode 100644
index 1dba809..0000000
--- a/third_party/abseil/absl/base/internal/hide_ptr.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_HIDE_PTR_H_
-#define ABSL_BASE_INTERNAL_HIDE_PTR_H_
-
-#include <cstdint>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// Arbitrary value with high bits set. Xor'ing with it is unlikely
-// to map one valid pointer to another valid pointer.
-constexpr uintptr_t HideMask() {
-  return (uintptr_t{0xF03A5F7BU} << (sizeof(uintptr_t) - 4) * 8) | 0xF03A5F7BU;
-}
-
-// Hide a pointer from the leak checker. For internal use only.
-// Differs from absl::IgnoreLeak(ptr) in that absl::IgnoreLeak(ptr) causes ptr
-// and all objects reachable from ptr to be ignored by the leak checker.
-template <class T>
-inline uintptr_t HidePtr(T* ptr) {
-  return reinterpret_cast<uintptr_t>(ptr) ^ HideMask();
-}
-
-// Return a pointer that has been hidden from the leak checker.
-// For internal use only.
-template <class T>
-inline T* UnhidePtr(uintptr_t hidden) {
-  return reinterpret_cast<T*>(hidden ^ HideMask());
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_HIDE_PTR_H_
diff --git a/third_party/abseil/absl/base/internal/identity.h b/third_party/abseil/absl/base/internal/identity.h
deleted file mode 100644
index a3154ed..0000000
--- a/third_party/abseil/absl/base/internal/identity.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_IDENTITY_H_
-#define ABSL_BASE_INTERNAL_IDENTITY_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace internal {
-
-template <typename T>
-struct identity {
-  typedef T type;
-};
-
-template <typename T>
-using identity_t = typename identity<T>::type;
-
-}  // namespace internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_IDENTITY_H_
diff --git a/third_party/abseil/absl/base/internal/inline_variable.h b/third_party/abseil/absl/base/internal/inline_variable.h
deleted file mode 100644
index 130d8c2..0000000
--- a/third_party/abseil/absl/base/internal/inline_variable.h
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_
-#define ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_
-
-#include <type_traits>
-
-#include "absl/base/internal/identity.h"
-
-// File:
-//   This file define a macro that allows the creation of or emulation of C++17
-//   inline variables based on whether or not the feature is supported.
-
-////////////////////////////////////////////////////////////////////////////////
-// Macro: ABSL_INTERNAL_INLINE_CONSTEXPR(type, name, init)
-//
-// Description:
-//   Expands to the equivalent of an inline constexpr instance of the specified
-//   `type` and `name`, initialized to the value `init`. If the compiler being
-//   used is detected as supporting actual inline variables as a language
-//   feature, then the macro expands to an actual inline variable definition.
-//
-// Requires:
-//   `type` is a type that is usable in an extern variable declaration.
-//
-// Requires: `name` is a valid identifier
-//
-// Requires:
-//   `init` is an expression that can be used in the following definition:
-//     constexpr type name = init;
-//
-// Usage:
-//
-//   // Equivalent to: `inline constexpr size_t variant_npos = -1;`
-//   ABSL_INTERNAL_INLINE_CONSTEXPR(size_t, variant_npos, -1);
-//
-// Differences in implementation:
-//   For a direct, language-level inline variable, decltype(name) will be the
-//   type that was specified along with const qualification, whereas for
-//   emulated inline variables, decltype(name) may be different (in practice
-//   it will likely be a reference type).
-////////////////////////////////////////////////////////////////////////////////
-
-#ifdef __cpp_inline_variables
-
-// Clang's -Wmissing-variable-declarations option erroneously warned that
-// inline constexpr objects need to be pre-declared. This has now been fixed,
-// but we will need to support this workaround for people building with older
-// versions of clang.
-//
-// Bug: https://bugs.llvm.org/show_bug.cgi?id=35862
-//
-// Note:
-//   identity_t is used here so that the const and name are in the
-//   appropriate place for pointer types, reference types, function pointer
-//   types, etc..
-#if defined(__clang__)
-#define ABSL_INTERNAL_EXTERN_DECL(type, name) \
-  extern const ::absl::internal::identity_t<type> name;
-#else  // Otherwise, just define the macro to do nothing.
-#define ABSL_INTERNAL_EXTERN_DECL(type, name)
-#endif  // defined(__clang__)
-
-// See above comment at top of file for details.
-#define ABSL_INTERNAL_INLINE_CONSTEXPR(type, name, init) \
-  ABSL_INTERNAL_EXTERN_DECL(type, name)                  \
-  inline constexpr ::absl::internal::identity_t<type> name = init
-
-#else
-
-// See above comment at top of file for details.
-//
-// Note:
-//   identity_t is used here so that the const and name are in the
-//   appropriate place for pointer types, reference types, function pointer
-//   types, etc..
-#define ABSL_INTERNAL_INLINE_CONSTEXPR(var_type, name, init)                  \
-  template <class /*AbslInternalDummy*/ = void>                               \
-  struct AbslInternalInlineVariableHolder##name {                             \
-    static constexpr ::absl::internal::identity_t<var_type> kInstance = init; \
-  };                                                                          \
-                                                                              \
-  template <class AbslInternalDummy>                                          \
-  constexpr ::absl::internal::identity_t<var_type>                            \
-      AbslInternalInlineVariableHolder##name<AbslInternalDummy>::kInstance;   \
-                                                                              \
-  static constexpr const ::absl::internal::identity_t<var_type>&              \
-      name = /* NOLINT */                                                     \
-      AbslInternalInlineVariableHolder##name<>::kInstance;                    \
-  static_assert(sizeof(void (*)(decltype(name))) != 0,                        \
-                "Silence unused variable warnings.")
-
-#endif  // __cpp_inline_variables
-
-#endif  // ABSL_BASE_INTERNAL_INLINE_VARIABLE_EMULATION_H_
diff --git a/third_party/abseil/absl/base/internal/inline_variable_testing.h b/third_party/abseil/absl/base/internal/inline_variable_testing.h
deleted file mode 100644
index 3856b9f..0000000
--- a/third_party/abseil/absl/base/internal/inline_variable_testing.h
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INLINE_VARIABLE_TESTING_H_
-#define ABSL_BASE_INLINE_VARIABLE_TESTING_H_
-
-#include "absl/base/internal/inline_variable.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace inline_variable_testing_internal {
-
-struct Foo {
-  int value = 5;
-};
-
-ABSL_INTERNAL_INLINE_CONSTEXPR(Foo, inline_variable_foo, {});
-ABSL_INTERNAL_INLINE_CONSTEXPR(Foo, other_inline_variable_foo, {});
-
-ABSL_INTERNAL_INLINE_CONSTEXPR(int, inline_variable_int, 5);
-ABSL_INTERNAL_INLINE_CONSTEXPR(int, other_inline_variable_int, 5);
-
-ABSL_INTERNAL_INLINE_CONSTEXPR(void(*)(), inline_variable_fun_ptr, nullptr);
-
-const Foo& get_foo_a();
-const Foo& get_foo_b();
-
-const int& get_int_a();
-const int& get_int_b();
-
-}  // namespace inline_variable_testing_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INLINE_VARIABLE_TESTING_H_
diff --git a/third_party/abseil/absl/base/internal/invoke.h b/third_party/abseil/absl/base/internal/invoke.h
deleted file mode 100644
index 5c71f32..0000000
--- a/third_party/abseil/absl/base/internal/invoke.h
+++ /dev/null
@@ -1,187 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// absl::base_internal::invoke(f, args...) is an implementation of
-// INVOKE(f, args...) from section [func.require] of the C++ standard.
-//
-// [func.require]
-// Define INVOKE (f, t1, t2, ..., tN) as follows:
-// 1. (t1.*f)(t2, ..., tN) when f is a pointer to a member function of a class T
-//    and t1 is an object of type T or a reference to an object of type T or a
-//    reference to an object of a type derived from T;
-// 2. ((*t1).*f)(t2, ..., tN) when f is a pointer to a member function of a
-//    class T and t1 is not one of the types described in the previous item;
-// 3. t1.*f when N == 1 and f is a pointer to member data of a class T and t1 is
-//    an object of type T or a reference to an object of type T or a reference
-//    to an object of a type derived from T;
-// 4. (*t1).*f when N == 1 and f is a pointer to member data of a class T and t1
-//    is not one of the types described in the previous item;
-// 5. f(t1, t2, ..., tN) in all other cases.
-//
-// The implementation is SFINAE-friendly: substitution failure within invoke()
-// isn't an error.
-
-#ifndef ABSL_BASE_INTERNAL_INVOKE_H_
-#define ABSL_BASE_INTERNAL_INVOKE_H_
-
-#include <algorithm>
-#include <type_traits>
-#include <utility>
-
-#include "absl/meta/type_traits.h"
-
-// The following code is internal implementation detail.  See the comment at the
-// top of this file for the API documentation.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// The five classes below each implement one of the clauses from the definition
-// of INVOKE. The inner class template Accept<F, Args...> checks whether the
-// clause is applicable; static function template Invoke(f, args...) does the
-// invocation.
-//
-// By separating the clause selection logic from invocation we make sure that
-// Invoke() does exactly what the standard says.
-
-template <typename Derived>
-struct StrippedAccept {
-  template <typename... Args>
-  struct Accept : Derived::template AcceptImpl<typename std::remove_cv<
-                      typename std::remove_reference<Args>::type>::type...> {};
-};
-
-// (t1.*f)(t2, ..., tN) when f is a pointer to a member function of a class T
-// and t1 is an object of type T or a reference to an object of type T or a
-// reference to an object of a type derived from T.
-struct MemFunAndRef : StrippedAccept<MemFunAndRef> {
-  template <typename... Args>
-  struct AcceptImpl : std::false_type {};
-
-  template <typename MemFunType, typename C, typename Obj, typename... Args>
-  struct AcceptImpl<MemFunType C::*, Obj, Args...>
-      : std::integral_constant<bool, std::is_base_of<C, Obj>::value &&
-                                         absl::is_function<MemFunType>::value> {
-  };
-
-  template <typename MemFun, typename Obj, typename... Args>
-  static decltype((std::declval<Obj>().*
-                   std::declval<MemFun>())(std::declval<Args>()...))
-  Invoke(MemFun&& mem_fun, Obj&& obj, Args&&... args) {
-    return (std::forward<Obj>(obj).*
-            std::forward<MemFun>(mem_fun))(std::forward<Args>(args)...);
-  }
-};
-
-// ((*t1).*f)(t2, ..., tN) when f is a pointer to a member function of a
-// class T and t1 is not one of the types described in the previous item.
-struct MemFunAndPtr : StrippedAccept<MemFunAndPtr> {
-  template <typename... Args>
-  struct AcceptImpl : std::false_type {};
-
-  template <typename MemFunType, typename C, typename Ptr, typename... Args>
-  struct AcceptImpl<MemFunType C::*, Ptr, Args...>
-      : std::integral_constant<bool, !std::is_base_of<C, Ptr>::value &&
-                                         absl::is_function<MemFunType>::value> {
-  };
-
-  template <typename MemFun, typename Ptr, typename... Args>
-  static decltype(((*std::declval<Ptr>()).*
-                   std::declval<MemFun>())(std::declval<Args>()...))
-  Invoke(MemFun&& mem_fun, Ptr&& ptr, Args&&... args) {
-    return ((*std::forward<Ptr>(ptr)).*
-            std::forward<MemFun>(mem_fun))(std::forward<Args>(args)...);
-  }
-};
-
-// t1.*f when N == 1 and f is a pointer to member data of a class T and t1 is
-// an object of type T or a reference to an object of type T or a reference
-// to an object of a type derived from T.
-struct DataMemAndRef : StrippedAccept<DataMemAndRef> {
-  template <typename... Args>
-  struct AcceptImpl : std::false_type {};
-
-  template <typename R, typename C, typename Obj>
-  struct AcceptImpl<R C::*, Obj>
-      : std::integral_constant<bool, std::is_base_of<C, Obj>::value &&
-                                         !absl::is_function<R>::value> {};
-
-  template <typename DataMem, typename Ref>
-  static decltype(std::declval<Ref>().*std::declval<DataMem>()) Invoke(
-      DataMem&& data_mem, Ref&& ref) {
-    return std::forward<Ref>(ref).*std::forward<DataMem>(data_mem);
-  }
-};
-
-// (*t1).*f when N == 1 and f is a pointer to member data of a class T and t1
-// is not one of the types described in the previous item.
-struct DataMemAndPtr : StrippedAccept<DataMemAndPtr> {
-  template <typename... Args>
-  struct AcceptImpl : std::false_type {};
-
-  template <typename R, typename C, typename Ptr>
-  struct AcceptImpl<R C::*, Ptr>
-      : std::integral_constant<bool, !std::is_base_of<C, Ptr>::value &&
-                                         !absl::is_function<R>::value> {};
-
-  template <typename DataMem, typename Ptr>
-  static decltype((*std::declval<Ptr>()).*std::declval<DataMem>()) Invoke(
-      DataMem&& data_mem, Ptr&& ptr) {
-    return (*std::forward<Ptr>(ptr)).*std::forward<DataMem>(data_mem);
-  }
-};
-
-// f(t1, t2, ..., tN) in all other cases.
-struct Callable {
-  // Callable doesn't have Accept because it's the last clause that gets picked
-  // when none of the previous clauses are applicable.
-  template <typename F, typename... Args>
-  static decltype(std::declval<F>()(std::declval<Args>()...)) Invoke(
-      F&& f, Args&&... args) {
-    return std::forward<F>(f)(std::forward<Args>(args)...);
-  }
-};
-
-// Resolves to the first matching clause.
-template <typename... Args>
-struct Invoker {
-  typedef typename std::conditional<
-      MemFunAndRef::Accept<Args...>::value, MemFunAndRef,
-      typename std::conditional<
-          MemFunAndPtr::Accept<Args...>::value, MemFunAndPtr,
-          typename std::conditional<
-              DataMemAndRef::Accept<Args...>::value, DataMemAndRef,
-              typename std::conditional<DataMemAndPtr::Accept<Args...>::value,
-                                        DataMemAndPtr, Callable>::type>::type>::
-          type>::type type;
-};
-
-// The result type of Invoke<F, Args...>.
-template <typename F, typename... Args>
-using invoke_result_t = decltype(Invoker<F, Args...>::type::Invoke(
-    std::declval<F>(), std::declval<Args>()...));
-
-// Invoke(f, args...) is an implementation of INVOKE(f, args...) from section
-// [func.require] of the C++ standard.
-template <typename F, typename... Args>
-invoke_result_t<F, Args...> invoke(F&& f, Args&&... args) {
-  return Invoker<F, Args...>::type::Invoke(std::forward<F>(f),
-                                           std::forward<Args>(args)...);
-}
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_INVOKE_H_
diff --git a/third_party/abseil/absl/base/internal/low_level_alloc.cc b/third_party/abseil/absl/base/internal/low_level_alloc.cc
deleted file mode 100644
index 229ab91..0000000
--- a/third_party/abseil/absl/base/internal/low_level_alloc.cc
+++ /dev/null
@@ -1,620 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// A low-level allocator that can be used by other low-level
-// modules without introducing dependency cycles.
-// This allocator is slow and wasteful of memory;
-// it should not be used when performance is key.
-
-#include "absl/base/internal/low_level_alloc.h"
-
-#include <type_traits>
-
-#include "absl/base/call_once.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/direct_mmap.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/macros.h"
-#include "absl/base/thread_annotations.h"
-
-// LowLevelAlloc requires that the platform support low-level
-// allocation of virtual memory. Platforms lacking this cannot use
-// LowLevelAlloc.
-#ifndef ABSL_LOW_LEVEL_ALLOC_MISSING
-
-#ifndef _WIN32
-#include <pthread.h>
-#include <signal.h>
-#include <sys/mman.h>
-#include <unistd.h>
-#else
-#include <windows.h>
-#endif
-
-#include <string.h>
-#include <algorithm>
-#include <atomic>
-#include <cerrno>
-#include <cstddef>
-#include <new>                   // for placement-new
-
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-
-// MAP_ANONYMOUS
-#if defined(__APPLE__)
-// For mmap, Linux defines both MAP_ANONYMOUS and MAP_ANON and says MAP_ANON is
-// deprecated. In Darwin, MAP_ANON is all there is.
-#if !defined MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif  // !MAP_ANONYMOUS
-#endif  // __APPLE__
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// A first-fit allocator with amortized logarithmic free() time.
-
-// ---------------------------------------------------------------------------
-static const int kMaxLevel = 30;
-
-namespace {
-// This struct describes one allocated block, or one free block.
-struct AllocList {
-  struct Header {
-    // Size of entire region, including this field. Must be
-    // first. Valid in both allocated and unallocated blocks.
-    uintptr_t size;
-
-    // kMagicAllocated or kMagicUnallocated xor this.
-    uintptr_t magic;
-
-    // Pointer to parent arena.
-    LowLevelAlloc::Arena *arena;
-
-    // Aligns regions to 0 mod 2*sizeof(void*).
-    void *dummy_for_alignment;
-  } header;
-
-  // Next two fields: in unallocated blocks: freelist skiplist data
-  //                  in allocated blocks: overlaps with client data
-
-  // Levels in skiplist used.
-  int levels;
-
-  // Actually has levels elements. The AllocList node may not have room
-  // for all kMaxLevel entries. See max_fit in LLA_SkiplistLevels().
-  AllocList *next[kMaxLevel];
-};
-}  // namespace
-
-// ---------------------------------------------------------------------------
-// A trivial skiplist implementation.  This is used to keep the freelist
-// in address order while taking only logarithmic time per insert and delete.
-
-// An integer approximation of log2(size/base)
-// Requires size >= base.
-static int IntLog2(size_t size, size_t base) {
-  int result = 0;
-  for (size_t i = size; i > base; i >>= 1) {  // i == floor(size/2**result)
-    result++;
-  }
-  //    floor(size / 2**result) <= base < floor(size / 2**(result-1))
-  // =>     log2(size/(base+1)) <= result < 1+log2(size/base)
-  // => result ~= log2(size/base)
-  return result;
-}
-
-// Return a random integer n:  p(n)=1/(2**n) if 1 <= n; p(n)=0 if n < 1.
-static int Random(uint32_t *state) {
-  uint32_t r = *state;
-  int result = 1;
-  while ((((r = r*1103515245 + 12345) >> 30) & 1) == 0) {
-    result++;
-  }
-  *state = r;
-  return result;
-}
-
-// Return a number of skiplist levels for a node of size bytes, where
-// base is the minimum node size.  Compute level=log2(size / base)+n
-// where n is 1 if random is false and otherwise a random number generated with
-// the standard distribution for a skiplist:  See Random() above.
-// Bigger nodes tend to have more skiplist levels due to the log2(size / base)
-// term, so first-fit searches touch fewer nodes.  "level" is clipped so
-// level<kMaxLevel and next[level-1] will fit in the node.
-// 0 < LLA_SkiplistLevels(x,y,false) <= LLA_SkiplistLevels(x,y,true) < kMaxLevel
-static int LLA_SkiplistLevels(size_t size, size_t base, uint32_t *random) {
-  // max_fit is the maximum number of levels that will fit in a node for the
-  // given size.   We can't return more than max_fit, no matter what the
-  // random number generator says.
-  size_t max_fit = (size - offsetof(AllocList, next)) / sizeof(AllocList *);
-  int level = IntLog2(size, base) + (random != nullptr ? Random(random) : 1);
-  if (static_cast<size_t>(level) > max_fit) level = static_cast<int>(max_fit);
-  if (level > kMaxLevel-1) level = kMaxLevel - 1;
-  ABSL_RAW_CHECK(level >= 1, "block not big enough for even one level");
-  return level;
-}
-
-// Return "atleast", the first element of AllocList *head s.t. *atleast >= *e.
-// For 0 <= i < head->levels, set prev[i] to "no_greater", where no_greater
-// points to the last element at level i in the AllocList less than *e, or is
-// head if no such element exists.
-static AllocList *LLA_SkiplistSearch(AllocList *head,
-                                     AllocList *e, AllocList **prev) {
-  AllocList *p = head;
-  for (int level = head->levels - 1; level >= 0; level--) {
-    for (AllocList *n; (n = p->next[level]) != nullptr && n < e; p = n) {
-    }
-    prev[level] = p;
-  }
-  return (head->levels == 0) ? nullptr : prev[0]->next[0];
-}
-
-// Insert element *e into AllocList *head.  Set prev[] as LLA_SkiplistSearch.
-// Requires that e->levels be previously set by the caller (using
-// LLA_SkiplistLevels())
-static void LLA_SkiplistInsert(AllocList *head, AllocList *e,
-                               AllocList **prev) {
-  LLA_SkiplistSearch(head, e, prev);
-  for (; head->levels < e->levels; head->levels++) {  // extend prev pointers
-    prev[head->levels] = head;                        // to all *e's levels
-  }
-  for (int i = 0; i != e->levels; i++) {  // add element to list
-    e->next[i] = prev[i]->next[i];
-    prev[i]->next[i] = e;
-  }
-}
-
-// Remove element *e from AllocList *head.  Set prev[] as LLA_SkiplistSearch().
-// Requires that e->levels be previous set by the caller (using
-// LLA_SkiplistLevels())
-static void LLA_SkiplistDelete(AllocList *head, AllocList *e,
-                               AllocList **prev) {
-  AllocList *found = LLA_SkiplistSearch(head, e, prev);
-  ABSL_RAW_CHECK(e == found, "element not in freelist");
-  for (int i = 0; i != e->levels && prev[i]->next[i] == e; i++) {
-    prev[i]->next[i] = e->next[i];
-  }
-  while (head->levels > 0 && head->next[head->levels - 1] == nullptr) {
-    head->levels--;   // reduce head->levels if level unused
-  }
-}
-
-// ---------------------------------------------------------------------------
-// Arena implementation
-
-// Metadata for an LowLevelAlloc arena instance.
-struct LowLevelAlloc::Arena {
-  // Constructs an arena with the given LowLevelAlloc flags.
-  explicit Arena(uint32_t flags_value);
-
-  base_internal::SpinLock mu;
-  // Head of free list, sorted by address
-  AllocList freelist ABSL_GUARDED_BY(mu);
-  // Count of allocated blocks
-  int32_t allocation_count ABSL_GUARDED_BY(mu);
-  // flags passed to NewArena
-  const uint32_t flags;
-  // Result of sysconf(_SC_PAGESIZE)
-  const size_t pagesize;
-  // Lowest power of two >= max(16, sizeof(AllocList))
-  const size_t round_up;
-  // Smallest allocation block size
-  const size_t min_size;
-  // PRNG state
-  uint32_t random ABSL_GUARDED_BY(mu);
-};
-
-namespace {
-// Static storage space for the lazily-constructed, default global arena
-// instances.  We require this space because the whole point of LowLevelAlloc
-// is to avoid relying on malloc/new.
-alignas(LowLevelAlloc::Arena) unsigned char default_arena_storage[sizeof(
-    LowLevelAlloc::Arena)];
-alignas(LowLevelAlloc::Arena) unsigned char unhooked_arena_storage[sizeof(
-    LowLevelAlloc::Arena)];
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-alignas(
-    LowLevelAlloc::Arena) unsigned char unhooked_async_sig_safe_arena_storage
-    [sizeof(LowLevelAlloc::Arena)];
-#endif
-
-// We must use LowLevelCallOnce here to construct the global arenas, rather than
-// using function-level statics, to avoid recursively invoking the scheduler.
-absl::once_flag create_globals_once;
-
-void CreateGlobalArenas() {
-  new (&default_arena_storage)
-      LowLevelAlloc::Arena(LowLevelAlloc::kCallMallocHook);
-  new (&unhooked_arena_storage) LowLevelAlloc::Arena(0);
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-  new (&unhooked_async_sig_safe_arena_storage)
-      LowLevelAlloc::Arena(LowLevelAlloc::kAsyncSignalSafe);
-#endif
-}
-
-// Returns a global arena that does not call into hooks.  Used by NewArena()
-// when kCallMallocHook is not set.
-LowLevelAlloc::Arena* UnhookedArena() {
-  base_internal::LowLevelCallOnce(&create_globals_once, CreateGlobalArenas);
-  return reinterpret_cast<LowLevelAlloc::Arena*>(&unhooked_arena_storage);
-}
-
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-// Returns a global arena that is async-signal safe.  Used by NewArena() when
-// kAsyncSignalSafe is set.
-LowLevelAlloc::Arena *UnhookedAsyncSigSafeArena() {
-  base_internal::LowLevelCallOnce(&create_globals_once, CreateGlobalArenas);
-  return reinterpret_cast<LowLevelAlloc::Arena *>(
-      &unhooked_async_sig_safe_arena_storage);
-}
-#endif
-
-}  // namespace
-
-// Returns the default arena, as used by LowLevelAlloc::Alloc() and friends.
-LowLevelAlloc::Arena *LowLevelAlloc::DefaultArena() {
-  base_internal::LowLevelCallOnce(&create_globals_once, CreateGlobalArenas);
-  return reinterpret_cast<LowLevelAlloc::Arena*>(&default_arena_storage);
-}
-
-// magic numbers to identify allocated and unallocated blocks
-static const uintptr_t kMagicAllocated = 0x4c833e95U;
-static const uintptr_t kMagicUnallocated = ~kMagicAllocated;
-
-namespace {
-class ABSL_SCOPED_LOCKABLE ArenaLock {
- public:
-  explicit ArenaLock(LowLevelAlloc::Arena *arena)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION(arena->mu)
-      : arena_(arena) {
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-    if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) != 0) {
-      sigset_t all;
-      sigfillset(&all);
-      mask_valid_ = pthread_sigmask(SIG_BLOCK, &all, &mask_) == 0;
-    }
-#endif
-    arena_->mu.Lock();
-  }
-  ~ArenaLock() { ABSL_RAW_CHECK(left_, "haven't left Arena region"); }
-  void Leave() ABSL_UNLOCK_FUNCTION() {
-    arena_->mu.Unlock();
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-    if (mask_valid_) {
-      const int err = pthread_sigmask(SIG_SETMASK, &mask_, nullptr);
-      if (err != 0) {
-        ABSL_RAW_LOG(FATAL, "pthread_sigmask failed: %d", err);
-      }
-    }
-#endif
-    left_ = true;
-  }
-
- private:
-  bool left_ = false;  // whether left region
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-  bool mask_valid_ = false;
-  sigset_t mask_;  // old mask of blocked signals
-#endif
-  LowLevelAlloc::Arena *arena_;
-  ArenaLock(const ArenaLock &) = delete;
-  ArenaLock &operator=(const ArenaLock &) = delete;
-};
-}  // namespace
-
-// create an appropriate magic number for an object at "ptr"
-// "magic" should be kMagicAllocated or kMagicUnallocated
-inline static uintptr_t Magic(uintptr_t magic, AllocList::Header *ptr) {
-  return magic ^ reinterpret_cast<uintptr_t>(ptr);
-}
-
-namespace {
-size_t GetPageSize() {
-#ifdef _WIN32
-  SYSTEM_INFO system_info;
-  GetSystemInfo(&system_info);
-  return std::max(system_info.dwPageSize, system_info.dwAllocationGranularity);
-#elif defined(__wasm__) || defined(__asmjs__)
-  return getpagesize();
-#else
-  return sysconf(_SC_PAGESIZE);
-#endif
-}
-
-size_t RoundedUpBlockSize() {
-  // Round up block sizes to a power of two close to the header size.
-  size_t round_up = 16;
-  while (round_up < sizeof(AllocList::Header)) {
-    round_up += round_up;
-  }
-  return round_up;
-}
-
-}  // namespace
-
-LowLevelAlloc::Arena::Arena(uint32_t flags_value)
-    : mu(base_internal::SCHEDULE_KERNEL_ONLY),
-      allocation_count(0),
-      flags(flags_value),
-      pagesize(GetPageSize()),
-      round_up(RoundedUpBlockSize()),
-      min_size(2 * round_up),
-      random(0) {
-  freelist.header.size = 0;
-  freelist.header.magic =
-      Magic(kMagicUnallocated, &freelist.header);
-  freelist.header.arena = this;
-  freelist.levels = 0;
-  memset(freelist.next, 0, sizeof(freelist.next));
-}
-
-// L < meta_data_arena->mu
-LowLevelAlloc::Arena *LowLevelAlloc::NewArena(int32_t flags) {
-  Arena *meta_data_arena = DefaultArena();
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-  if ((flags & LowLevelAlloc::kAsyncSignalSafe) != 0) {
-    meta_data_arena = UnhookedAsyncSigSafeArena();
-  } else  // NOLINT(readability/braces)
-#endif
-      if ((flags & LowLevelAlloc::kCallMallocHook) == 0) {
-    meta_data_arena = UnhookedArena();
-  }
-  Arena *result =
-    new (AllocWithArena(sizeof (*result), meta_data_arena)) Arena(flags);
-  return result;
-}
-
-// L < arena->mu, L < arena->arena->mu
-bool LowLevelAlloc::DeleteArena(Arena *arena) {
-  ABSL_RAW_CHECK(
-      arena != nullptr && arena != DefaultArena() && arena != UnhookedArena(),
-      "may not delete default arena");
-  ArenaLock section(arena);
-  if (arena->allocation_count != 0) {
-    section.Leave();
-    return false;
-  }
-  while (arena->freelist.next[0] != nullptr) {
-    AllocList *region = arena->freelist.next[0];
-    size_t size = region->header.size;
-    arena->freelist.next[0] = region->next[0];
-    ABSL_RAW_CHECK(
-        region->header.magic == Magic(kMagicUnallocated, &region->header),
-        "bad magic number in DeleteArena()");
-    ABSL_RAW_CHECK(region->header.arena == arena,
-                   "bad arena pointer in DeleteArena()");
-    ABSL_RAW_CHECK(size % arena->pagesize == 0,
-                   "empty arena has non-page-aligned block size");
-    ABSL_RAW_CHECK(reinterpret_cast<uintptr_t>(region) % arena->pagesize == 0,
-                   "empty arena has non-page-aligned block");
-    int munmap_result;
-#ifdef _WIN32
-    munmap_result = VirtualFree(region, 0, MEM_RELEASE);
-    ABSL_RAW_CHECK(munmap_result != 0,
-                   "LowLevelAlloc::DeleteArena: VitualFree failed");
-#else
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-    if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) == 0) {
-      munmap_result = munmap(region, size);
-    } else {
-      munmap_result = base_internal::DirectMunmap(region, size);
-    }
-#else
-    munmap_result = munmap(region, size);
-#endif  // ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-    if (munmap_result != 0) {
-      ABSL_RAW_LOG(FATAL, "LowLevelAlloc::DeleteArena: munmap failed: %d",
-                   errno);
-    }
-#endif  // _WIN32
-  }
-  section.Leave();
-  arena->~Arena();
-  Free(arena);
-  return true;
-}
-
-// ---------------------------------------------------------------------------
-
-// Addition, checking for overflow.  The intent is to die if an external client
-// manages to push through a request that would cause arithmetic to fail.
-static inline uintptr_t CheckedAdd(uintptr_t a, uintptr_t b) {
-  uintptr_t sum = a + b;
-  ABSL_RAW_CHECK(sum >= a, "LowLevelAlloc arithmetic overflow");
-  return sum;
-}
-
-// Return value rounded up to next multiple of align.
-// align must be a power of two.
-static inline uintptr_t RoundUp(uintptr_t addr, uintptr_t align) {
-  return CheckedAdd(addr, align - 1) & ~(align - 1);
-}
-
-// Equivalent to "return prev->next[i]" but with sanity checking
-// that the freelist is in the correct order, that it
-// consists of regions marked "unallocated", and that no two regions
-// are adjacent in memory (they should have been coalesced).
-// L >= arena->mu
-static AllocList *Next(int i, AllocList *prev, LowLevelAlloc::Arena *arena) {
-  ABSL_RAW_CHECK(i < prev->levels, "too few levels in Next()");
-  AllocList *next = prev->next[i];
-  if (next != nullptr) {
-    ABSL_RAW_CHECK(
-        next->header.magic == Magic(kMagicUnallocated, &next->header),
-        "bad magic number in Next()");
-    ABSL_RAW_CHECK(next->header.arena == arena, "bad arena pointer in Next()");
-    if (prev != &arena->freelist) {
-      ABSL_RAW_CHECK(prev < next, "unordered freelist");
-      ABSL_RAW_CHECK(reinterpret_cast<char *>(prev) + prev->header.size <
-                         reinterpret_cast<char *>(next),
-                     "malformed freelist");
-    }
-  }
-  return next;
-}
-
-// Coalesce list item "a" with its successor if they are adjacent.
-static void Coalesce(AllocList *a) {
-  AllocList *n = a->next[0];
-  if (n != nullptr && reinterpret_cast<char *>(a) + a->header.size ==
-                          reinterpret_cast<char *>(n)) {
-    LowLevelAlloc::Arena *arena = a->header.arena;
-    a->header.size += n->header.size;
-    n->header.magic = 0;
-    n->header.arena = nullptr;
-    AllocList *prev[kMaxLevel];
-    LLA_SkiplistDelete(&arena->freelist, n, prev);
-    LLA_SkiplistDelete(&arena->freelist, a, prev);
-    a->levels = LLA_SkiplistLevels(a->header.size, arena->min_size,
-                                   &arena->random);
-    LLA_SkiplistInsert(&arena->freelist, a, prev);
-  }
-}
-
-// Adds block at location "v" to the free list
-// L >= arena->mu
-static void AddToFreelist(void *v, LowLevelAlloc::Arena *arena) {
-  AllocList *f = reinterpret_cast<AllocList *>(
-                        reinterpret_cast<char *>(v) - sizeof (f->header));
-  ABSL_RAW_CHECK(f->header.magic == Magic(kMagicAllocated, &f->header),
-                 "bad magic number in AddToFreelist()");
-  ABSL_RAW_CHECK(f->header.arena == arena,
-                 "bad arena pointer in AddToFreelist()");
-  f->levels = LLA_SkiplistLevels(f->header.size, arena->min_size,
-                                 &arena->random);
-  AllocList *prev[kMaxLevel];
-  LLA_SkiplistInsert(&arena->freelist, f, prev);
-  f->header.magic = Magic(kMagicUnallocated, &f->header);
-  Coalesce(f);                  // maybe coalesce with successor
-  Coalesce(prev[0]);            // maybe coalesce with predecessor
-}
-
-// Frees storage allocated by LowLevelAlloc::Alloc().
-// L < arena->mu
-void LowLevelAlloc::Free(void *v) {
-  if (v != nullptr) {
-    AllocList *f = reinterpret_cast<AllocList *>(
-                        reinterpret_cast<char *>(v) - sizeof (f->header));
-    LowLevelAlloc::Arena *arena = f->header.arena;
-    ArenaLock section(arena);
-    AddToFreelist(v, arena);
-    ABSL_RAW_CHECK(arena->allocation_count > 0, "nothing in arena to free");
-    arena->allocation_count--;
-    section.Leave();
-  }
-}
-
-// allocates and returns a block of size bytes, to be freed with Free()
-// L < arena->mu
-static void *DoAllocWithArena(size_t request, LowLevelAlloc::Arena *arena) {
-  void *result = nullptr;
-  if (request != 0) {
-    AllocList *s;       // will point to region that satisfies request
-    ArenaLock section(arena);
-    // round up with header
-    size_t req_rnd = RoundUp(CheckedAdd(request, sizeof (s->header)),
-                             arena->round_up);
-    for (;;) {      // loop until we find a suitable region
-      // find the minimum levels that a block of this size must have
-      int i = LLA_SkiplistLevels(req_rnd, arena->min_size, nullptr) - 1;
-      if (i < arena->freelist.levels) {   // potential blocks exist
-        AllocList *before = &arena->freelist;  // predecessor of s
-        while ((s = Next(i, before, arena)) != nullptr &&
-               s->header.size < req_rnd) {
-          before = s;
-        }
-        if (s != nullptr) {       // we found a region
-          break;
-        }
-      }
-      // we unlock before mmap() both because mmap() may call a callback hook,
-      // and because it may be slow.
-      arena->mu.Unlock();
-      // mmap generous 64K chunks to decrease
-      // the chances/impact of fragmentation:
-      size_t new_pages_size = RoundUp(req_rnd, arena->pagesize * 16);
-      void *new_pages;
-#ifdef _WIN32
-      new_pages = VirtualAlloc(0, new_pages_size,
-                               MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
-      ABSL_RAW_CHECK(new_pages != nullptr, "VirtualAlloc failed");
-#else
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-      if ((arena->flags & LowLevelAlloc::kAsyncSignalSafe) != 0) {
-        new_pages = base_internal::DirectMmap(nullptr, new_pages_size,
-            PROT_WRITE|PROT_READ, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
-      } else {
-        new_pages = mmap(nullptr, new_pages_size, PROT_WRITE | PROT_READ,
-                         MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-      }
-#else
-      new_pages = mmap(nullptr, new_pages_size, PROT_WRITE | PROT_READ,
-                       MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-#endif  // ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-      if (new_pages == MAP_FAILED) {
-        ABSL_RAW_LOG(FATAL, "mmap error: %d", errno);
-      }
-
-#endif  // _WIN32
-      arena->mu.Lock();
-      s = reinterpret_cast<AllocList *>(new_pages);
-      s->header.size = new_pages_size;
-      // Pretend the block is allocated; call AddToFreelist() to free it.
-      s->header.magic = Magic(kMagicAllocated, &s->header);
-      s->header.arena = arena;
-      AddToFreelist(&s->levels, arena);  // insert new region into free list
-    }
-    AllocList *prev[kMaxLevel];
-    LLA_SkiplistDelete(&arena->freelist, s, prev);    // remove from free list
-    // s points to the first free region that's big enough
-    if (CheckedAdd(req_rnd, arena->min_size) <= s->header.size) {
-      // big enough to split
-      AllocList *n = reinterpret_cast<AllocList *>
-                        (req_rnd + reinterpret_cast<char *>(s));
-      n->header.size = s->header.size - req_rnd;
-      n->header.magic = Magic(kMagicAllocated, &n->header);
-      n->header.arena = arena;
-      s->header.size = req_rnd;
-      AddToFreelist(&n->levels, arena);
-    }
-    s->header.magic = Magic(kMagicAllocated, &s->header);
-    ABSL_RAW_CHECK(s->header.arena == arena, "");
-    arena->allocation_count++;
-    section.Leave();
-    result = &s->levels;
-  }
-  ABSL_ANNOTATE_MEMORY_IS_UNINITIALIZED(result, request);
-  return result;
-}
-
-void *LowLevelAlloc::Alloc(size_t request) {
-  void *result = DoAllocWithArena(request, DefaultArena());
-  return result;
-}
-
-void *LowLevelAlloc::AllocWithArena(size_t request, Arena *arena) {
-  ABSL_RAW_CHECK(arena != nullptr, "must pass a valid arena");
-  void *result = DoAllocWithArena(request, arena);
-  return result;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_LOW_LEVEL_ALLOC_MISSING
diff --git a/third_party/abseil/absl/base/internal/low_level_alloc.h b/third_party/abseil/absl/base/internal/low_level_alloc.h
deleted file mode 100644
index db91951..0000000
--- a/third_party/abseil/absl/base/internal/low_level_alloc.h
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_LOW_LEVEL_ALLOC_H_
-#define ABSL_BASE_INTERNAL_LOW_LEVEL_ALLOC_H_
-
-// A simple thread-safe memory allocator that does not depend on
-// mutexes or thread-specific data.  It is intended to be used
-// sparingly, and only when malloc() would introduce an unwanted
-// dependency, such as inside the heap-checker, or the Mutex
-// implementation.
-
-// IWYU pragma: private, include "base/low_level_alloc.h"
-
-#include <sys/types.h>
-
-#include <cstdint>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-
-// LowLevelAlloc requires that the platform support low-level
-// allocation of virtual memory. Platforms lacking this cannot use
-// LowLevelAlloc.
-#ifdef ABSL_LOW_LEVEL_ALLOC_MISSING
-#error ABSL_LOW_LEVEL_ALLOC_MISSING cannot be directly set
-#elif !defined(ABSL_HAVE_MMAP) && !defined(_WIN32)
-#define ABSL_LOW_LEVEL_ALLOC_MISSING 1
-#endif
-
-// Using LowLevelAlloc with kAsyncSignalSafe isn't supported on Windows or
-// asm.js / WebAssembly.
-// See https://kripken.github.io/emscripten-site/docs/porting/pthreads.html
-// for more information.
-#ifdef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-#error ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING cannot be directly set
-#elif defined(_WIN32) || defined(__asmjs__) || defined(__wasm__)
-#define ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING 1
-#endif
-
-#include <cstddef>
-
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-class LowLevelAlloc {
- public:
-  struct Arena;       // an arena from which memory may be allocated
-
-  // Returns a pointer to a block of at least "request" bytes
-  // that have been newly allocated from the specific arena.
-  // for Alloc() call the DefaultArena() is used.
-  // Returns 0 if passed request==0.
-  // Does not return 0 under other circumstances; it crashes if memory
-  // is not available.
-  static void *Alloc(size_t request) ABSL_ATTRIBUTE_SECTION(malloc_hook);
-  static void *AllocWithArena(size_t request, Arena *arena)
-      ABSL_ATTRIBUTE_SECTION(malloc_hook);
-
-  // Deallocates a region of memory that was previously allocated with
-  // Alloc().   Does nothing if passed 0.   "s" must be either 0,
-  // or must have been returned from a call to Alloc() and not yet passed to
-  // Free() since that call to Alloc().  The space is returned to the arena
-  // from which it was allocated.
-  static void Free(void *s) ABSL_ATTRIBUTE_SECTION(malloc_hook);
-
-  // ABSL_ATTRIBUTE_SECTION(malloc_hook) for Alloc* and Free
-  // are to put all callers of MallocHook::Invoke* in this module
-  // into special section,
-  // so that MallocHook::GetCallerStackTrace can function accurately.
-
-  // Create a new arena.
-  // The root metadata for the new arena is allocated in the
-  // meta_data_arena; the DefaultArena() can be passed for meta_data_arena.
-  // These values may be ored into flags:
-  enum {
-    // Report calls to Alloc() and Free() via the MallocHook interface.
-    // Set in the DefaultArena.
-    kCallMallocHook = 0x0001,
-
-#ifndef ABSL_LOW_LEVEL_ALLOC_ASYNC_SIGNAL_SAFE_MISSING
-    // Make calls to Alloc(), Free() be async-signal-safe. Not set in
-    // DefaultArena(). Not supported on all platforms.
-    kAsyncSignalSafe = 0x0002,
-#endif
-  };
-  // Construct a new arena.  The allocation of the underlying metadata honors
-  // the provided flags.  For example, the call NewArena(kAsyncSignalSafe)
-  // is itself async-signal-safe, as well as generatating an arena that provides
-  // async-signal-safe Alloc/Free.
-  static Arena *NewArena(int32_t flags);
-
-  // Destroys an arena allocated by NewArena and returns true,
-  // provided no allocated blocks remain in the arena.
-  // If allocated blocks remain in the arena, does nothing and
-  // returns false.
-  // It is illegal to attempt to destroy the DefaultArena().
-  static bool DeleteArena(Arena *arena);
-
-  // The default arena that always exists.
-  static Arena *DefaultArena();
-
- private:
-  LowLevelAlloc();      // no instances
-};
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_LOW_LEVEL_ALLOC_H_
diff --git a/third_party/abseil/absl/base/internal/low_level_alloc_test.cc b/third_party/abseil/absl/base/internal/low_level_alloc_test.cc
deleted file mode 100644
index 31abb88..0000000
--- a/third_party/abseil/absl/base/internal/low_level_alloc_test.cc
+++ /dev/null
@@ -1,181 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/low_level_alloc.h"
-
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <thread>  // NOLINT(build/c++11)
-#include <unordered_map>
-#include <utility>
-
-#ifdef __EMSCRIPTEN__
-#include <emscripten.h>
-#endif
-
-#include "absl/container/node_hash_map.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-// This test doesn't use gtest since it needs to test that everything
-// works before main().
-#define TEST_ASSERT(x)                                           \
-  if (!(x)) {                                                    \
-    printf("TEST_ASSERT(%s) FAILED ON LINE %d\n", #x, __LINE__); \
-    abort();                                                     \
-  }
-
-// a block of memory obtained from the allocator
-struct BlockDesc {
-  char *ptr;      // pointer to memory
-  int len;        // number of bytes
-  int fill;       // filled with data starting with this
-};
-
-// Check that the pattern placed in the block d
-// by RandomizeBlockDesc is still there.
-static void CheckBlockDesc(const BlockDesc &d) {
-  for (int i = 0; i != d.len; i++) {
-    TEST_ASSERT((d.ptr[i] & 0xff) == ((d.fill + i) & 0xff));
-  }
-}
-
-// Fill the block "*d" with a pattern
-// starting with a random byte.
-static void RandomizeBlockDesc(BlockDesc *d) {
-  d->fill = rand() & 0xff;
-  for (int i = 0; i != d->len; i++) {
-    d->ptr[i] = (d->fill + i) & 0xff;
-  }
-}
-
-// Use to indicate to the malloc hooks that
-// this calls is from LowLevelAlloc.
-static bool using_low_level_alloc = false;
-
-// n times, toss a coin, and based on the outcome
-// either allocate a new block or deallocate an old block.
-// New blocks are placed in a std::unordered_map with a random key
-// and initialized with RandomizeBlockDesc().
-// If keys conflict, the older block is freed.
-// Old blocks are always checked with CheckBlockDesc()
-// before being freed.  At the end of the run,
-// all remaining allocated blocks are freed.
-// If use_new_arena is true, use a fresh arena, and then delete it.
-// If call_malloc_hook is true and user_arena is true,
-// allocations and deallocations are reported via the MallocHook
-// interface.
-static void Test(bool use_new_arena, bool call_malloc_hook, int n) {
-  typedef absl::node_hash_map<int, BlockDesc> AllocMap;
-  AllocMap allocated;
-  AllocMap::iterator it;
-  BlockDesc block_desc;
-  int rnd;
-  LowLevelAlloc::Arena *arena = 0;
-  if (use_new_arena) {
-    int32_t flags = call_malloc_hook ? LowLevelAlloc::kCallMallocHook : 0;
-    arena = LowLevelAlloc::NewArena(flags);
-  }
-  for (int i = 0; i != n; i++) {
-    if (i != 0 && i % 10000 == 0) {
-      printf(".");
-      fflush(stdout);
-    }
-
-    switch (rand() & 1) {      // toss a coin
-    case 0:     // coin came up heads: add a block
-      using_low_level_alloc = true;
-      block_desc.len = rand() & 0x3fff;
-      block_desc.ptr =
-        reinterpret_cast<char *>(
-                        arena == 0
-                        ? LowLevelAlloc::Alloc(block_desc.len)
-                        : LowLevelAlloc::AllocWithArena(block_desc.len, arena));
-      using_low_level_alloc = false;
-      RandomizeBlockDesc(&block_desc);
-      rnd = rand();
-      it = allocated.find(rnd);
-      if (it != allocated.end()) {
-        CheckBlockDesc(it->second);
-        using_low_level_alloc = true;
-        LowLevelAlloc::Free(it->second.ptr);
-        using_low_level_alloc = false;
-        it->second = block_desc;
-      } else {
-        allocated[rnd] = block_desc;
-      }
-      break;
-    case 1:     // coin came up tails: remove a block
-      it = allocated.begin();
-      if (it != allocated.end()) {
-        CheckBlockDesc(it->second);
-        using_low_level_alloc = true;
-        LowLevelAlloc::Free(it->second.ptr);
-        using_low_level_alloc = false;
-        allocated.erase(it);
-      }
-      break;
-    }
-  }
-  // remove all remaining blocks
-  while ((it = allocated.begin()) != allocated.end()) {
-    CheckBlockDesc(it->second);
-    using_low_level_alloc = true;
-    LowLevelAlloc::Free(it->second.ptr);
-    using_low_level_alloc = false;
-    allocated.erase(it);
-  }
-  if (use_new_arena) {
-    TEST_ASSERT(LowLevelAlloc::DeleteArena(arena));
-  }
-}
-
-// LowLevelAlloc is designed to be safe to call before main().
-static struct BeforeMain {
-  BeforeMain() {
-    Test(false, false, 50000);
-    Test(true, false, 50000);
-    Test(true, true, 50000);
-  }
-} before_main;
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-int main(int argc, char *argv[]) {
-  // The actual test runs in the global constructor of `before_main`.
-  printf("PASS\n");
-#ifdef __EMSCRIPTEN__
-  // clang-format off
-// This is JS here. Don't try to format it.
-    MAIN_THREAD_EM_ASM({
-      if (ENVIRONMENT_IS_WEB) {
-        if (typeof TEST_FINISH === 'function') {
-          TEST_FINISH($0);
-        } else {
-          console.error('Attempted to exit with status ' + $0);
-          console.error('But TEST_FINSIHED is not a function.');
-        }
-      }
-    }, 0);
-// clang-format on
-#endif
-  return 0;
-}
diff --git a/third_party/abseil/absl/base/internal/low_level_scheduling.h b/third_party/abseil/absl/base/internal/low_level_scheduling.h
deleted file mode 100644
index 9baccc0..0000000
--- a/third_party/abseil/absl/base/internal/low_level_scheduling.h
+++ /dev/null
@@ -1,134 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Core interfaces and definitions used by by low-level interfaces such as
-// SpinLock.
-
-#ifndef ABSL_BASE_INTERNAL_LOW_LEVEL_SCHEDULING_H_
-#define ABSL_BASE_INTERNAL_LOW_LEVEL_SCHEDULING_H_
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/macros.h"
-
-// The following two declarations exist so SchedulingGuard may friend them with
-// the appropriate language linkage.  These callbacks allow libc internals, such
-// as function level statics, to schedule cooperatively when locking.
-extern "C" bool __google_disable_rescheduling(void);
-extern "C" void __google_enable_rescheduling(bool disable_result);
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-class CondVar;
-class Mutex;
-
-namespace synchronization_internal {
-int MutexDelay(int32_t c, int mode);
-}  // namespace synchronization_internal
-
-namespace base_internal {
-
-class SchedulingHelper;  // To allow use of SchedulingGuard.
-class SpinLock;          // To allow use of SchedulingGuard.
-
-// SchedulingGuard
-// Provides guard semantics that may be used to disable cooperative rescheduling
-// of the calling thread within specific program blocks.  This is used to
-// protect resources (e.g. low-level SpinLocks or Domain code) that cooperative
-// scheduling depends on.
-//
-// Domain implementations capable of rescheduling in reaction to involuntary
-// kernel thread actions (e.g blocking due to a pagefault or syscall) must
-// guarantee that an annotated thread is not allowed to (cooperatively)
-// reschedule until the annotated region is complete.
-//
-// It is an error to attempt to use a cooperatively scheduled resource (e.g.
-// Mutex) within a rescheduling-disabled region.
-//
-// All methods are async-signal safe.
-class SchedulingGuard {
- public:
-  // Returns true iff the calling thread may be cooperatively rescheduled.
-  static bool ReschedulingIsAllowed();
-  SchedulingGuard(const SchedulingGuard&) = delete;
-  SchedulingGuard& operator=(const SchedulingGuard&) = delete;
-
- private:
-  // Disable cooperative rescheduling of the calling thread.  It may still
-  // initiate scheduling operations (e.g. wake-ups), however, it may not itself
-  // reschedule.  Nestable.  The returned result is opaque, clients should not
-  // attempt to interpret it.
-  // REQUIRES: Result must be passed to a pairing EnableScheduling().
-  static bool DisableRescheduling();
-
-  // Marks the end of a rescheduling disabled region, previously started by
-  // DisableRescheduling().
-  // REQUIRES: Pairs with innermost call (and result) of DisableRescheduling().
-  static void EnableRescheduling(bool disable_result);
-
-  // A scoped helper for {Disable, Enable}Rescheduling().
-  // REQUIRES: destructor must run in same thread as constructor.
-  struct ScopedDisable {
-    ScopedDisable() { disabled = SchedulingGuard::DisableRescheduling(); }
-    ~ScopedDisable() { SchedulingGuard::EnableRescheduling(disabled); }
-
-    bool disabled;
-  };
-
-  // A scoped helper to enable rescheduling temporarily.
-  // REQUIRES: destructor must run in same thread as constructor.
-  class ScopedEnable {
-   public:
-    ScopedEnable();
-    ~ScopedEnable();
-
-   private:
-    int scheduling_disabled_depth_;
-  };
-
-  // Access to SchedulingGuard is explicitly permitted.
-  friend class absl::CondVar;
-  friend class absl::Mutex;
-  friend class SchedulingHelper;
-  friend class SpinLock;
-  friend int absl::synchronization_internal::MutexDelay(int32_t c, int mode);
-};
-
-//------------------------------------------------------------------------------
-// End of public interfaces.
-//------------------------------------------------------------------------------
-
-inline bool SchedulingGuard::ReschedulingIsAllowed() {
-  return false;
-}
-
-inline bool SchedulingGuard::DisableRescheduling() {
-  return false;
-}
-
-inline void SchedulingGuard::EnableRescheduling(bool /* disable_result */) {
-  return;
-}
-
-inline SchedulingGuard::ScopedEnable::ScopedEnable()
-    : scheduling_disabled_depth_(0) {}
-inline SchedulingGuard::ScopedEnable::~ScopedEnable() {
-  ABSL_RAW_CHECK(scheduling_disabled_depth_ == 0, "disable unused warning");
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_LOW_LEVEL_SCHEDULING_H_
diff --git a/third_party/abseil/absl/base/internal/per_thread_tls.h b/third_party/abseil/absl/base/internal/per_thread_tls.h
deleted file mode 100644
index cf5e97a..0000000
--- a/third_party/abseil/absl/base/internal/per_thread_tls.h
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_
-#define ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_
-
-// This header defines two macros:
-//
-// If the platform supports thread-local storage:
-//
-// * ABSL_PER_THREAD_TLS_KEYWORD is the C keyword needed to declare a
-//   thread-local variable
-// * ABSL_PER_THREAD_TLS is 1
-//
-// Otherwise:
-//
-// * ABSL_PER_THREAD_TLS_KEYWORD is empty
-// * ABSL_PER_THREAD_TLS is 0
-//
-// Microsoft C supports thread-local storage.
-// GCC supports it if the appropriate version of glibc is available,
-// which the programmer can indicate by defining ABSL_HAVE_TLS
-
-#include "absl/base/port.h"  // For ABSL_HAVE_TLS
-
-#if defined(ABSL_PER_THREAD_TLS)
-#error ABSL_PER_THREAD_TLS cannot be directly set
-#elif defined(ABSL_PER_THREAD_TLS_KEYWORD)
-#error ABSL_PER_THREAD_TLS_KEYWORD cannot be directly set
-#elif defined(ABSL_HAVE_TLS)
-#define ABSL_PER_THREAD_TLS_KEYWORD __thread
-#define ABSL_PER_THREAD_TLS 1
-#elif defined(_MSC_VER)
-#define ABSL_PER_THREAD_TLS_KEYWORD __declspec(thread)
-#define ABSL_PER_THREAD_TLS 1
-#else
-#define ABSL_PER_THREAD_TLS_KEYWORD
-#define ABSL_PER_THREAD_TLS 0
-#endif
-
-#endif  // ABSL_BASE_INTERNAL_PER_THREAD_TLS_H_
diff --git a/third_party/abseil/absl/base/internal/periodic_sampler.cc b/third_party/abseil/absl/base/internal/periodic_sampler.cc
deleted file mode 100644
index 520dabb..0000000
--- a/third_party/abseil/absl/base/internal/periodic_sampler.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/periodic_sampler.h"
-
-#include <atomic>
-
-#include "absl/base/internal/exponential_biased.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-int64_t PeriodicSamplerBase::GetExponentialBiased(int period) noexcept {
-  return rng_.GetStride(period);
-}
-
-bool PeriodicSamplerBase::SubtleConfirmSample() noexcept {
-  int current_period = period();
-
-  // Deal with period case 0 (always off) and 1 (always on)
-  if (ABSL_PREDICT_FALSE(current_period < 2)) {
-    stride_ = 0;
-    return current_period == 1;
-  }
-
-  // Check if this is the first call to Sample()
-  if (ABSL_PREDICT_FALSE(stride_ == 1)) {
-    stride_ = static_cast<uint64_t>(-GetExponentialBiased(current_period));
-    if (static_cast<int64_t>(stride_) < -1) {
-      ++stride_;
-      return false;
-    }
-  }
-
-  stride_ = static_cast<uint64_t>(-GetExponentialBiased(current_period));
-  return true;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/periodic_sampler.h b/third_party/abseil/absl/base/internal/periodic_sampler.h
deleted file mode 100644
index f8a8679..0000000
--- a/third_party/abseil/absl/base/internal/periodic_sampler.h
+++ /dev/null
@@ -1,211 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_PERIODIC_SAMPLER_H_
-#define ABSL_BASE_INTERNAL_PERIODIC_SAMPLER_H_
-
-#include <stdint.h>
-
-#include <atomic>
-
-#include "absl/base/internal/exponential_biased.h"
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// PeriodicSamplerBase provides the basic period sampler implementation.
-//
-// This is the base class for the templated PeriodicSampler class, which holds
-// a global std::atomic value identified by a user defined tag, such that
-// each specific PeriodSampler implementation holds its own global period.
-//
-// PeriodicSamplerBase is thread-compatible except where stated otherwise.
-class PeriodicSamplerBase {
- public:
-  // PeriodicSamplerBase is trivial / copyable / movable / destructible.
-  PeriodicSamplerBase() = default;
-  PeriodicSamplerBase(PeriodicSamplerBase&&) = default;
-  PeriodicSamplerBase(const PeriodicSamplerBase&) = default;
-
-  // Returns true roughly once every `period` calls. This is established by a
-  // randomly picked `stride` that is counted down on each call to `Sample`.
-  // This stride is picked such that the probability of `Sample()` returning
-  // true is 1 in `period`.
-  inline bool Sample() noexcept;
-
-  // The below methods are intended for optimized use cases where the
-  // size of the inlined fast path code is highly important. Applications
-  // should use the `Sample()` method unless they have proof that their
-  // specific use case requires the optimizations offered by these methods.
-  //
-  // An example of such a use case is SwissTable sampling. All sampling checks
-  // are in inlined SwissTable methods, and the number of call sites is huge.
-  // In this case, the inlined code size added to each translation unit calling
-  // SwissTable methods is non-trivial.
-  //
-  // The `SubtleMaybeSample()` function spuriously returns true even if the
-  // function should not be sampled, applications MUST match each call to
-  // 'SubtleMaybeSample()' returning true with a `SubtleConfirmSample()` call,
-  // and use the result of the latter as the sampling decision.
-  // In other words: the code should logically be equivalent to:
-  //
-  //    if (SubtleMaybeSample() && SubtleConfirmSample()) {
-  //      // Sample this call
-  //    }
-  //
-  // In the 'inline-size' optimized case, the `SubtleConfirmSample()` call can
-  // be placed out of line, for example, the typical use case looks as follows:
-  //
-  //   // --- frobber.h -----------
-  //   void FrobberSampled();
-  //
-  //   inline void FrobberImpl() {
-  //     // ...
-  //   }
-  //
-  //   inline void Frobber() {
-  //     if (ABSL_PREDICT_FALSE(sampler.SubtleMaybeSample())) {
-  //       FrobberSampled();
-  //     } else {
-  //       FrobberImpl();
-  //     }
-  //   }
-  //
-  //   // --- frobber.cc -----------
-  //   void FrobberSampled() {
-  //     if (!sampler.SubtleConfirmSample())) {
-  //       // Spurious false positive
-  //       FrobberImpl();
-  //       return;
-  //     }
-  //
-  //     // Sampled execution
-  //     // ...
-  //   }
-  inline bool SubtleMaybeSample() noexcept;
-  bool SubtleConfirmSample() noexcept;
-
- protected:
-  // We explicitly don't use a virtual destructor as this class is never
-  // virtually destroyed, and it keeps the class trivial, which avoids TLS
-  // prologue and epilogue code for our TLS instances.
-  ~PeriodicSamplerBase() = default;
-
-  // Returns the next stride for our sampler.
-  // This function is virtual for testing purposes only.
-  virtual int64_t GetExponentialBiased(int period) noexcept;
-
- private:
-  // Returns the current period of this sampler. Thread-safe.
-  virtual int period() const noexcept = 0;
-
-  // Keep and decrement stride_ as an unsigned integer, but compare the value
-  // to zero casted as a signed int. clang and msvc do not create optimum code
-  // if we use signed for the combined decrement and sign comparison.
-  //
-  // Below 3 alternative options, all compiles generate the best code
-  // using the unsigned increment <---> signed int comparison option.
-  //
-  // Option 1:
-  //   int64_t stride_;
-  //   if (ABSL_PREDICT_TRUE(++stride_ < 0)) { ... }
-  //
-  //   GCC   x64 (OK) : https://gcc.godbolt.org/z/R5MzzA
-  //   GCC   ppc (OK) : https://gcc.godbolt.org/z/z7NZAt
-  //   Clang x64 (BAD): https://gcc.godbolt.org/z/t4gPsd
-  //   ICC   x64 (OK) : https://gcc.godbolt.org/z/rE6s8W
-  //   MSVC  x64 (OK) : https://gcc.godbolt.org/z/ARMXqS
-  //
-  // Option 2:
-  //   int64_t stride_ = 0;
-  //   if (ABSL_PREDICT_TRUE(--stride_ >= 0)) { ... }
-  //
-  //   GCC   x64 (OK) : https://gcc.godbolt.org/z/jSQxYK
-  //   GCC   ppc (OK) : https://gcc.godbolt.org/z/VJdYaA
-  //   Clang x64 (BAD): https://gcc.godbolt.org/z/Xm4NjX
-  //   ICC   x64 (OK) : https://gcc.godbolt.org/z/4snaFd
-  //   MSVC  x64 (BAD): https://gcc.godbolt.org/z/BgnEKE
-  //
-  // Option 3:
-  //   uint64_t stride_;
-  //   if (ABSL_PREDICT_TRUE(static_cast<int64_t>(++stride_) < 0)) { ... }
-  //
-  //   GCC   x64 (OK) : https://gcc.godbolt.org/z/bFbfPy
-  //   GCC   ppc (OK) : https://gcc.godbolt.org/z/S9KkUE
-  //   Clang x64 (OK) : https://gcc.godbolt.org/z/UYzRb4
-  //   ICC   x64 (OK) : https://gcc.godbolt.org/z/ptTNfD
-  //   MSVC  x64 (OK) : https://gcc.godbolt.org/z/76j4-5
-  uint64_t stride_ = 0;
-  ExponentialBiased rng_;
-};
-
-inline bool PeriodicSamplerBase::SubtleMaybeSample() noexcept {
-  // See comments on `stride_` for the unsigned increment / signed compare.
-  if (ABSL_PREDICT_TRUE(static_cast<int64_t>(++stride_) < 0)) {
-    return false;
-  }
-  return true;
-}
-
-inline bool PeriodicSamplerBase::Sample() noexcept {
-  return ABSL_PREDICT_FALSE(SubtleMaybeSample()) ? SubtleConfirmSample()
-                                                 : false;
-}
-
-// PeriodicSampler is a concreted periodic sampler implementation.
-// The user provided Tag identifies the implementation, and is required to
-// isolate the global state of this instance from other instances.
-//
-// Typical use case:
-//
-//   struct HashTablezTag {};
-//   thread_local PeriodicSampler sampler;
-//
-//   void HashTableSamplingLogic(...) {
-//     if (sampler.Sample()) {
-//       HashTableSlowSamplePath(...);
-//     }
-//   }
-//
-template <typename Tag, int default_period = 0>
-class PeriodicSampler final : public PeriodicSamplerBase {
- public:
-  ~PeriodicSampler() = default;
-
-  int period() const noexcept final {
-    return period_.load(std::memory_order_relaxed);
-  }
-
-  // Sets the global period for this sampler. Thread-safe.
-  // Setting a period of 0 disables the sampler, i.e., every call to Sample()
-  // will return false. Setting a period of 1 puts the sampler in 'always on'
-  // mode, i.e., every call to Sample() returns true.
-  static void SetGlobalPeriod(int period) {
-    period_.store(period, std::memory_order_relaxed);
-  }
-
- private:
-  static std::atomic<int> period_;
-};
-
-template <typename Tag, int default_period>
-std::atomic<int> PeriodicSampler<Tag, default_period>::period_(default_period);
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_PERIODIC_SAMPLER_H_
diff --git a/third_party/abseil/absl/base/internal/periodic_sampler_benchmark.cc b/third_party/abseil/absl/base/internal/periodic_sampler_benchmark.cc
deleted file mode 100644
index 5ad469c..0000000
--- a/third_party/abseil/absl/base/internal/periodic_sampler_benchmark.cc
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/periodic_sampler.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-template <typename Sampler>
-void BM_Sample(Sampler* sampler, benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(sampler);
-    benchmark::DoNotOptimize(sampler->Sample());
-  }
-}
-
-template <typename Sampler>
-void BM_SampleMinunumInlined(Sampler* sampler, benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(sampler);
-    if (ABSL_PREDICT_FALSE(sampler->SubtleMaybeSample())) {
-      benchmark::DoNotOptimize(sampler->SubtleConfirmSample());
-    }
-  }
-}
-
-void BM_PeriodicSampler_TinySample(benchmark::State& state) {
-  struct Tag {};
-  PeriodicSampler<Tag, 10> sampler;
-  BM_Sample(&sampler, state);
-}
-BENCHMARK(BM_PeriodicSampler_TinySample);
-
-void BM_PeriodicSampler_ShortSample(benchmark::State& state) {
-  struct Tag {};
-  PeriodicSampler<Tag, 1024> sampler;
-  BM_Sample(&sampler, state);
-}
-BENCHMARK(BM_PeriodicSampler_ShortSample);
-
-void BM_PeriodicSampler_LongSample(benchmark::State& state) {
-  struct Tag {};
-  PeriodicSampler<Tag, 1024 * 1024> sampler;
-  BM_Sample(&sampler, state);
-}
-BENCHMARK(BM_PeriodicSampler_LongSample);
-
-void BM_PeriodicSampler_LongSampleMinunumInlined(benchmark::State& state) {
-  struct Tag {};
-  PeriodicSampler<Tag, 1024 * 1024> sampler;
-  BM_SampleMinunumInlined(&sampler, state);
-}
-BENCHMARK(BM_PeriodicSampler_LongSampleMinunumInlined);
-
-void BM_PeriodicSampler_Disabled(benchmark::State& state) {
-  struct Tag {};
-  PeriodicSampler<Tag, 0> sampler;
-  BM_Sample(&sampler, state);
-}
-BENCHMARK(BM_PeriodicSampler_Disabled);
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/periodic_sampler_test.cc b/third_party/abseil/absl/base/internal/periodic_sampler_test.cc
deleted file mode 100644
index 3b301e3..0000000
--- a/third_party/abseil/absl/base/internal/periodic_sampler_test.cc
+++ /dev/null
@@ -1,177 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/periodic_sampler.h"
-
-#include <thread>  // NOLINT(build/c++11)
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-using testing::Eq;
-using testing::Return;
-using testing::StrictMock;
-
-class MockPeriodicSampler : public PeriodicSamplerBase {
- public:
-  virtual ~MockPeriodicSampler() = default;
-
-  MOCK_METHOD(int, period, (), (const, noexcept));
-  MOCK_METHOD(int64_t, GetExponentialBiased, (int), (noexcept));
-};
-
-TEST(PeriodicSamplerBaseTest, Sample) {
-  StrictMock<MockPeriodicSampler> sampler;
-
-  EXPECT_CALL(sampler, period()).Times(3).WillRepeatedly(Return(16));
-  EXPECT_CALL(sampler, GetExponentialBiased(16))
-      .WillOnce(Return(2))
-      .WillOnce(Return(3))
-      .WillOnce(Return(4));
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_TRUE(sampler.Sample());
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_TRUE(sampler.Sample());
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-}
-
-TEST(PeriodicSamplerBaseTest, ImmediatelySample) {
-  StrictMock<MockPeriodicSampler> sampler;
-
-  EXPECT_CALL(sampler, period()).Times(2).WillRepeatedly(Return(16));
-  EXPECT_CALL(sampler, GetExponentialBiased(16))
-      .WillOnce(Return(1))
-      .WillOnce(Return(2))
-      .WillOnce(Return(3));
-
-  EXPECT_TRUE(sampler.Sample());
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_TRUE(sampler.Sample());
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-}
-
-TEST(PeriodicSamplerBaseTest, Disabled) {
-  StrictMock<MockPeriodicSampler> sampler;
-
-  EXPECT_CALL(sampler, period()).Times(3).WillRepeatedly(Return(0));
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-}
-
-TEST(PeriodicSamplerBaseTest, AlwaysOn) {
-  StrictMock<MockPeriodicSampler> sampler;
-
-  EXPECT_CALL(sampler, period()).Times(3).WillRepeatedly(Return(1));
-
-  EXPECT_TRUE(sampler.Sample());
-  EXPECT_TRUE(sampler.Sample());
-  EXPECT_TRUE(sampler.Sample());
-}
-
-TEST(PeriodicSamplerBaseTest, Disable) {
-  StrictMock<MockPeriodicSampler> sampler;
-
-  EXPECT_CALL(sampler, period()).WillOnce(Return(16));
-  EXPECT_CALL(sampler, GetExponentialBiased(16)).WillOnce(Return(3));
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-
-  EXPECT_CALL(sampler, period()).Times(2).WillRepeatedly(Return(0));
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-}
-
-TEST(PeriodicSamplerBaseTest, Enable) {
-  StrictMock<MockPeriodicSampler> sampler;
-
-  EXPECT_CALL(sampler, period()).WillOnce(Return(0));
-  EXPECT_FALSE(sampler.Sample());
-
-  EXPECT_CALL(sampler, period()).Times(2).WillRepeatedly(Return(16));
-  EXPECT_CALL(sampler, GetExponentialBiased(16))
-      .Times(2)
-      .WillRepeatedly(Return(3));
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_TRUE(sampler.Sample());
-
-  EXPECT_FALSE(sampler.Sample());
-  EXPECT_FALSE(sampler.Sample());
-}
-
-TEST(PeriodicSamplerTest, ConstructConstInit) {
-  struct Tag {};
-  ABSL_CONST_INIT static PeriodicSampler<Tag> sampler;
-  (void)sampler;
-}
-
-TEST(PeriodicSamplerTest, DefaultPeriod0) {
-  struct Tag {};
-  PeriodicSampler<Tag> sampler;
-  EXPECT_THAT(sampler.period(), Eq(0));
-}
-
-TEST(PeriodicSamplerTest, DefaultPeriod) {
-  struct Tag {};
-  PeriodicSampler<Tag, 100> sampler;
-  EXPECT_THAT(sampler.period(), Eq(100));
-}
-
-TEST(PeriodicSamplerTest, SetGlobalPeriod) {
-  struct Tag1 {};
-  struct Tag2 {};
-  PeriodicSampler<Tag1, 25> sampler1;
-  PeriodicSampler<Tag2, 50> sampler2;
-
-  EXPECT_THAT(sampler1.period(), Eq(25));
-  EXPECT_THAT(sampler2.period(), Eq(50));
-
-  std::thread thread([] {
-    PeriodicSampler<Tag1, 25> sampler1;
-    PeriodicSampler<Tag2, 50> sampler2;
-    EXPECT_THAT(sampler1.period(), Eq(25));
-    EXPECT_THAT(sampler2.period(), Eq(50));
-    sampler1.SetGlobalPeriod(10);
-    sampler2.SetGlobalPeriod(20);
-  });
-  thread.join();
-
-  EXPECT_THAT(sampler1.period(), Eq(10));
-  EXPECT_THAT(sampler2.period(), Eq(20));
-}
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/pretty_function.h b/third_party/abseil/absl/base/internal/pretty_function.h
deleted file mode 100644
index 35d5167..0000000
--- a/third_party/abseil/absl/base/internal/pretty_function.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_
-#define ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_
-
-// ABSL_PRETTY_FUNCTION
-//
-// In C++11, __func__ gives the undecorated name of the current function.  That
-// is, "main", not "int main()".  Various compilers give extra macros to get the
-// decorated function name, including return type and arguments, to
-// differentiate between overload sets.  ABSL_PRETTY_FUNCTION is a portable
-// version of these macros which forwards to the correct macro on each compiler.
-#if defined(_MSC_VER)
-#define ABSL_PRETTY_FUNCTION __FUNCSIG__
-#elif defined(__GNUC__)
-#define ABSL_PRETTY_FUNCTION __PRETTY_FUNCTION__
-#else
-#error "Unsupported compiler"
-#endif
-
-#endif  // ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_
diff --git a/third_party/abseil/absl/base/internal/raw_logging.cc b/third_party/abseil/absl/base/internal/raw_logging.cc
deleted file mode 100644
index 074e026..0000000
--- a/third_party/abseil/absl/base/internal/raw_logging.cc
+++ /dev/null
@@ -1,242 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/raw_logging.h"
-
-#include <stddef.h>
-#include <cstdarg>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/atomic_hook.h"
-#include "absl/base/log_severity.h"
-
-// We know how to perform low-level writes to stderr in POSIX and Windows.  For
-// these platforms, we define the token ABSL_LOW_LEVEL_WRITE_SUPPORTED.
-// Much of raw_logging.cc becomes a no-op when we can't output messages,
-// although a FATAL ABSL_RAW_LOG message will still abort the process.
-
-// ABSL_HAVE_POSIX_WRITE is defined when the platform provides posix write()
-// (as from unistd.h)
-//
-// This preprocessor token is also defined in raw_io.cc.  If you need to copy
-// this, consider moving both to config.h instead.
-#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
-    defined(__Fuchsia__) || defined(__native_client__) || \
-    defined(__EMSCRIPTEN__) || defined(__ASYLO__)
-
-#include <unistd.h>
-
-#define ABSL_HAVE_POSIX_WRITE 1
-#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
-#else
-#undef ABSL_HAVE_POSIX_WRITE
-#endif
-
-// ABSL_HAVE_SYSCALL_WRITE is defined when the platform provides the syscall
-//   syscall(SYS_write, /*int*/ fd, /*char* */ buf, /*size_t*/ len);
-// for low level operations that want to avoid libc.
-#if (defined(__linux__) || defined(__FreeBSD__)) && !defined(__ANDROID__)
-#include <sys/syscall.h>
-#define ABSL_HAVE_SYSCALL_WRITE 1
-#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
-#else
-#undef ABSL_HAVE_SYSCALL_WRITE
-#endif
-
-#ifdef _WIN32
-#include <io.h>
-
-#define ABSL_HAVE_RAW_IO 1
-#define ABSL_LOW_LEVEL_WRITE_SUPPORTED 1
-#else
-#undef ABSL_HAVE_RAW_IO
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace raw_logging_internal {
-namespace {
-
-// TODO(gfalcon): We want raw-logging to work on as many platforms as possible.
-// Explicitly `#error` out when not `ABSL_LOW_LEVEL_WRITE_SUPPORTED`, except for
-// a selected set of platforms for which we expect not to be able to raw log.
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-    absl::base_internal::AtomicHook<LogPrefixHook>
-        log_prefix_hook;
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-    absl::base_internal::AtomicHook<AbortHook>
-        abort_hook;
-
-#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
-constexpr char kTruncated[] = " ... (message truncated)\n";
-
-// sprintf the format to the buffer, adjusting *buf and *size to reflect the
-// consumed bytes, and return whether the message fit without truncation.  If
-// truncation occurred, if possible leave room in the buffer for the message
-// kTruncated[].
-bool VADoRawLog(char** buf, int* size, const char* format, va_list ap)
-    ABSL_PRINTF_ATTRIBUTE(3, 0);
-bool VADoRawLog(char** buf, int* size, const char* format, va_list ap) {
-  int n = vsnprintf(*buf, *size, format, ap);
-  bool result = true;
-  if (n < 0 || n > *size) {
-    result = false;
-    if (static_cast<size_t>(*size) > sizeof(kTruncated)) {
-      n = *size - sizeof(kTruncated);  // room for truncation message
-    } else {
-      n = 0;  // no room for truncation message
-    }
-  }
-  *size -= n;
-  *buf += n;
-  return result;
-}
-#endif  // ABSL_LOW_LEVEL_WRITE_SUPPORTED
-
-constexpr int kLogBufSize = 3000;
-
-// CAVEAT: vsnprintf called from *DoRawLog below has some (exotic) code paths
-// that invoke malloc() and getenv() that might acquire some locks.
-
-// Helper for RawLog below.
-// *DoRawLog writes to *buf of *size and move them past the written portion.
-// It returns true iff there was no overflow or error.
-bool DoRawLog(char** buf, int* size, const char* format, ...)
-    ABSL_PRINTF_ATTRIBUTE(3, 4);
-bool DoRawLog(char** buf, int* size, const char* format, ...) {
-  va_list ap;
-  va_start(ap, format);
-  int n = vsnprintf(*buf, *size, format, ap);
-  va_end(ap);
-  if (n < 0 || n > *size) return false;
-  *size -= n;
-  *buf += n;
-  return true;
-}
-
-void RawLogVA(absl::LogSeverity severity, const char* file, int line,
-              const char* format, va_list ap) ABSL_PRINTF_ATTRIBUTE(4, 0);
-void RawLogVA(absl::LogSeverity severity, const char* file, int line,
-              const char* format, va_list ap) {
-  char buffer[kLogBufSize];
-  char* buf = buffer;
-  int size = sizeof(buffer);
-#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
-  bool enabled = true;
-#else
-  bool enabled = false;
-#endif
-
-#ifdef ABSL_MIN_LOG_LEVEL
-  if (severity < static_cast<absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) &&
-      severity < absl::LogSeverity::kFatal) {
-    enabled = false;
-  }
-#endif
-
-  auto log_prefix_hook_ptr = log_prefix_hook.Load();
-  if (log_prefix_hook_ptr) {
-    enabled = log_prefix_hook_ptr(severity, file, line, &buf, &size);
-  } else {
-    if (enabled) {
-      DoRawLog(&buf, &size, "[%s : %d] RAW: ", file, line);
-    }
-  }
-  const char* const prefix_end = buf;
-
-#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
-  if (enabled) {
-    bool no_chop = VADoRawLog(&buf, &size, format, ap);
-    if (no_chop) {
-      DoRawLog(&buf, &size, "\n");
-    } else {
-      DoRawLog(&buf, &size, "%s", kTruncated);
-    }
-    SafeWriteToStderr(buffer, strlen(buffer));
-  }
-#else
-  static_cast<void>(format);
-  static_cast<void>(ap);
-#endif
-
-  // Abort the process after logging a FATAL message, even if the output itself
-  // was suppressed.
-  if (severity == absl::LogSeverity::kFatal) {
-    abort_hook(file, line, buffer, prefix_end, buffer + kLogBufSize);
-    abort();
-  }
-}
-
-// Non-formatting version of RawLog().
-//
-// TODO(gfalcon): When string_view no longer depends on base, change this
-// interface to take its message as a string_view instead.
-void DefaultInternalLog(absl::LogSeverity severity, const char* file, int line,
-                        const std::string& message) {
-  RawLog(severity, file, line, "%.*s", static_cast<int>(message.size()),
-         message.data());
-}
-
-}  // namespace
-
-void SafeWriteToStderr(const char *s, size_t len) {
-#if defined(ABSL_HAVE_SYSCALL_WRITE)
-  syscall(SYS_write, STDERR_FILENO, s, len);
-#elif defined(ABSL_HAVE_POSIX_WRITE)
-  write(STDERR_FILENO, s, len);
-#elif defined(ABSL_HAVE_RAW_IO)
-  _write(/* stderr */ 2, s, len);
-#else
-  // stderr logging unsupported on this platform
-  (void) s;
-  (void) len;
-#endif
-}
-
-void RawLog(absl::LogSeverity severity, const char* file, int line,
-            const char* format, ...) {
-  va_list ap;
-  va_start(ap, format);
-  RawLogVA(severity, file, line, format, ap);
-  va_end(ap);
-}
-
-bool RawLoggingFullySupported() {
-#ifdef ABSL_LOW_LEVEL_WRITE_SUPPORTED
-  return true;
-#else  // !ABSL_LOW_LEVEL_WRITE_SUPPORTED
-  return false;
-#endif  // !ABSL_LOW_LEVEL_WRITE_SUPPORTED
-}
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_DLL
-    absl::base_internal::AtomicHook<InternalLogFunction>
-        internal_log_function(DefaultInternalLog);
-
-void RegisterLogPrefixHook(LogPrefixHook func) { log_prefix_hook.Store(func); }
-
-void RegisterAbortHook(AbortHook func) { abort_hook.Store(func); }
-
-void RegisterInternalLogFunction(InternalLogFunction func) {
-  internal_log_function.Store(func);
-}
-
-}  // namespace raw_logging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/raw_logging.h b/third_party/abseil/absl/base/internal/raw_logging.h
deleted file mode 100644
index 2bf7aab..0000000
--- a/third_party/abseil/absl/base/internal/raw_logging.h
+++ /dev/null
@@ -1,195 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Thread-safe logging routines that do not allocate any memory or
-// acquire any locks, and can therefore be used by low-level memory
-// allocation, synchronization, and signal-handling code.
-
-#ifndef ABSL_BASE_INTERNAL_RAW_LOGGING_H_
-#define ABSL_BASE_INTERNAL_RAW_LOGGING_H_
-
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/atomic_hook.h"
-#include "absl/base/log_severity.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-
-// This is similar to LOG(severity) << format..., but
-// * it is to be used ONLY by low-level modules that can't use normal LOG()
-// * it is designed to be a low-level logger that does not allocate any
-//   memory and does not need any locks, hence:
-// * it logs straight and ONLY to STDERR w/o buffering
-// * it uses an explicit printf-format and arguments list
-// * it will silently chop off really long message strings
-// Usage example:
-//   ABSL_RAW_LOG(ERROR, "Failed foo with %i: %s", status, error);
-// This will print an almost standard log line like this to stderr only:
-//   E0821 211317 file.cc:123] RAW: Failed foo with 22: bad_file
-
-#define ABSL_RAW_LOG(severity, ...)                                            \
-  do {                                                                         \
-    constexpr const char* absl_raw_logging_internal_basename =                 \
-        ::absl::raw_logging_internal::Basename(__FILE__,                       \
-                                               sizeof(__FILE__) - 1);          \
-    ::absl::raw_logging_internal::RawLog(ABSL_RAW_LOGGING_INTERNAL_##severity, \
-                                         absl_raw_logging_internal_basename,   \
-                                         __LINE__, __VA_ARGS__);               \
-  } while (0)
-
-// Similar to CHECK(condition) << message, but for low-level modules:
-// we use only ABSL_RAW_LOG that does not allocate memory.
-// We do not want to provide args list here to encourage this usage:
-//   if (!cond)  ABSL_RAW_LOG(FATAL, "foo ...", hard_to_compute_args);
-// so that the args are not computed when not needed.
-#define ABSL_RAW_CHECK(condition, message)                             \
-  do {                                                                 \
-    if (ABSL_PREDICT_FALSE(!(condition))) {                            \
-      ABSL_RAW_LOG(FATAL, "Check %s failed: %s", #condition, message); \
-    }                                                                  \
-  } while (0)
-
-// ABSL_INTERNAL_LOG and ABSL_INTERNAL_CHECK work like the RAW variants above,
-// except that if the richer log library is linked into the binary, we dispatch
-// to that instead.  This is potentially useful for internal logging and
-// assertions, where we are using RAW_LOG neither for its async-signal-safety
-// nor for its non-allocating nature, but rather because raw logging has very
-// few other dependencies.
-//
-// The API is a subset of the above: each macro only takes two arguments.  Use
-// StrCat if you need to build a richer message.
-#define ABSL_INTERNAL_LOG(severity, message)                                 \
-  do {                                                                       \
-    constexpr const char* absl_raw_logging_internal_filename = __FILE__;     \
-    ::absl::raw_logging_internal::internal_log_function(                     \
-        ABSL_RAW_LOGGING_INTERNAL_##severity,                                \
-        absl_raw_logging_internal_filename, __LINE__, message);              \
-    if (ABSL_RAW_LOGGING_INTERNAL_##severity == ::absl::LogSeverity::kFatal) \
-      ABSL_INTERNAL_UNREACHABLE;                                             \
-  } while (0)
-
-#define ABSL_INTERNAL_CHECK(condition, message)                    \
-  do {                                                             \
-    if (ABSL_PREDICT_FALSE(!(condition))) {                        \
-      std::string death_message = "Check " #condition " failed: "; \
-      death_message += std::string(message);                       \
-      ABSL_INTERNAL_LOG(FATAL, death_message);                     \
-    }                                                              \
-  } while (0)
-
-#define ABSL_RAW_LOGGING_INTERNAL_INFO ::absl::LogSeverity::kInfo
-#define ABSL_RAW_LOGGING_INTERNAL_WARNING ::absl::LogSeverity::kWarning
-#define ABSL_RAW_LOGGING_INTERNAL_ERROR ::absl::LogSeverity::kError
-#define ABSL_RAW_LOGGING_INTERNAL_FATAL ::absl::LogSeverity::kFatal
-#define ABSL_RAW_LOGGING_INTERNAL_LEVEL(severity) \
-  ::absl::NormalizeLogSeverity(severity)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace raw_logging_internal {
-
-// Helper function to implement ABSL_RAW_LOG
-// Logs format... at "severity" level, reporting it
-// as called from file:line.
-// This does not allocate memory or acquire locks.
-void RawLog(absl::LogSeverity severity, const char* file, int line,
-            const char* format, ...) ABSL_PRINTF_ATTRIBUTE(4, 5);
-
-// Writes the provided buffer directly to stderr, in a safe, low-level manner.
-//
-// In POSIX this means calling write(), which is async-signal safe and does
-// not malloc.  If the platform supports the SYS_write syscall, we invoke that
-// directly to side-step any libc interception.
-void SafeWriteToStderr(const char *s, size_t len);
-
-// compile-time function to get the "base" filename, that is, the part of
-// a filename after the last "/" or "\" path separator.  The search starts at
-// the end of the string; the second parameter is the length of the string.
-constexpr const char* Basename(const char* fname, int offset) {
-  return offset == 0 || fname[offset - 1] == '/' || fname[offset - 1] == '\\'
-             ? fname + offset
-             : Basename(fname, offset - 1);
-}
-
-// For testing only.
-// Returns true if raw logging is fully supported. When it is not
-// fully supported, no messages will be emitted, but a log at FATAL
-// severity will cause an abort.
-//
-// TODO(gfalcon): Come up with a better name for this method.
-bool RawLoggingFullySupported();
-
-// Function type for a raw_logging customization hook for suppressing messages
-// by severity, and for writing custom prefixes on non-suppressed messages.
-//
-// The installed hook is called for every raw log invocation.  The message will
-// be logged to stderr only if the hook returns true.  FATAL errors will cause
-// the process to abort, even if writing to stderr is suppressed.  The hook is
-// also provided with an output buffer, where it can write a custom log message
-// prefix.
-//
-// The raw_logging system does not allocate memory or grab locks.  User-provided
-// hooks must avoid these operations, and must not throw exceptions.
-//
-// 'severity' is the severity level of the message being written.
-// 'file' and 'line' are the file and line number where the ABSL_RAW_LOG macro
-// was located.
-// 'buffer' and 'buf_size' are pointers to the buffer and buffer size.  If the
-// hook writes a prefix, it must increment *buffer and decrement *buf_size
-// accordingly.
-using LogPrefixHook = bool (*)(absl::LogSeverity severity, const char* file,
-                               int line, char** buffer, int* buf_size);
-
-// Function type for a raw_logging customization hook called to abort a process
-// when a FATAL message is logged.  If the provided AbortHook() returns, the
-// logging system will call abort().
-//
-// 'file' and 'line' are the file and line number where the ABSL_RAW_LOG macro
-// was located.
-// The NUL-terminated logged message lives in the buffer between 'buf_start'
-// and 'buf_end'.  'prefix_end' points to the first non-prefix character of the
-// buffer (as written by the LogPrefixHook.)
-using AbortHook = void (*)(const char* file, int line, const char* buf_start,
-                           const char* prefix_end, const char* buf_end);
-
-// Internal logging function for ABSL_INTERNAL_LOG to dispatch to.
-//
-// TODO(gfalcon): When string_view no longer depends on base, change this
-// interface to take its message as a string_view instead.
-using InternalLogFunction = void (*)(absl::LogSeverity severity,
-                                     const char* file, int line,
-                                     const std::string& message);
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES ABSL_DLL extern base_internal::AtomicHook<
-    InternalLogFunction>
-    internal_log_function;
-
-// Registers hooks of the above types.  Only a single hook of each type may be
-// registered.  It is an error to call these functions multiple times with
-// different input arguments.
-//
-// These functions are safe to call at any point during initialization; they do
-// not block or malloc, and are async-signal safe.
-void RegisterLogPrefixHook(LogPrefixHook func);
-void RegisterAbortHook(AbortHook func);
-void RegisterInternalLogFunction(InternalLogFunction func);
-
-}  // namespace raw_logging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_RAW_LOGGING_H_
diff --git a/third_party/abseil/absl/base/internal/scheduling_mode.h b/third_party/abseil/absl/base/internal/scheduling_mode.h
deleted file mode 100644
index 8be5ab6..0000000
--- a/third_party/abseil/absl/base/internal/scheduling_mode.h
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Core interfaces and definitions used by by low-level interfaces such as
-// SpinLock.
-
-#ifndef ABSL_BASE_INTERNAL_SCHEDULING_MODE_H_
-#define ABSL_BASE_INTERNAL_SCHEDULING_MODE_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// Used to describe how a thread may be scheduled.  Typically associated with
-// the declaration of a resource supporting synchronized access.
-//
-// SCHEDULE_COOPERATIVE_AND_KERNEL:
-// Specifies that when waiting, a cooperative thread (e.g. a Fiber) may
-// reschedule (using base::scheduling semantics); allowing other cooperative
-// threads to proceed.
-//
-// SCHEDULE_KERNEL_ONLY: (Also described as "non-cooperative")
-// Specifies that no cooperative scheduling semantics may be used, even if the
-// current thread is itself cooperatively scheduled.  This means that
-// cooperative threads will NOT allow other cooperative threads to execute in
-// their place while waiting for a resource of this type.  Host operating system
-// semantics (e.g. a futex) may still be used.
-//
-// When optional, clients should strongly prefer SCHEDULE_COOPERATIVE_AND_KERNEL
-// by default.  SCHEDULE_KERNEL_ONLY should only be used for resources on which
-// base::scheduling (e.g. the implementation of a Scheduler) may depend.
-//
-// NOTE: Cooperative resources may not be nested below non-cooperative ones.
-// This means that it is invalid to to acquire a SCHEDULE_COOPERATIVE_AND_KERNEL
-// resource if a SCHEDULE_KERNEL_ONLY resource is already held.
-enum SchedulingMode {
-  SCHEDULE_KERNEL_ONLY = 0,         // Allow scheduling only the host OS.
-  SCHEDULE_COOPERATIVE_AND_KERNEL,  // Also allow cooperative scheduling.
-};
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_SCHEDULING_MODE_H_
diff --git a/third_party/abseil/absl/base/internal/scoped_set_env.cc b/third_party/abseil/absl/base/internal/scoped_set_env.cc
deleted file mode 100644
index 8a934cb..0000000
--- a/third_party/abseil/absl/base/internal/scoped_set_env.cc
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/scoped_set_env.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#include <cstdlib>
-
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-namespace {
-
-#ifdef _WIN32
-const int kMaxEnvVarValueSize = 1024;
-#endif
-
-void SetEnvVar(const char* name, const char* value) {
-#ifdef _WIN32
-  SetEnvironmentVariableA(name, value);
-#else
-  if (value == nullptr) {
-    ::unsetenv(name);
-  } else {
-    ::setenv(name, value, 1);
-  }
-#endif
-}
-
-}  // namespace
-
-ScopedSetEnv::ScopedSetEnv(const char* var_name, const char* new_value)
-    : var_name_(var_name), was_unset_(false) {
-#ifdef _WIN32
-  char buf[kMaxEnvVarValueSize];
-  auto get_res = GetEnvironmentVariableA(var_name_.c_str(), buf, sizeof(buf));
-  ABSL_INTERNAL_CHECK(get_res < sizeof(buf), "value exceeds buffer size");
-
-  if (get_res == 0) {
-    was_unset_ = (GetLastError() == ERROR_ENVVAR_NOT_FOUND);
-  } else {
-    old_value_.assign(buf, get_res);
-  }
-
-  SetEnvironmentVariableA(var_name_.c_str(), new_value);
-#else
-  const char* val = ::getenv(var_name_.c_str());
-  if (val == nullptr) {
-    was_unset_ = true;
-  } else {
-    old_value_ = val;
-  }
-#endif
-
-  SetEnvVar(var_name_.c_str(), new_value);
-}
-
-ScopedSetEnv::~ScopedSetEnv() {
-  SetEnvVar(var_name_.c_str(), was_unset_ ? nullptr : old_value_.c_str());
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/scoped_set_env.h b/third_party/abseil/absl/base/internal/scoped_set_env.h
deleted file mode 100644
index 19ec7b5..0000000
--- a/third_party/abseil/absl/base/internal/scoped_set_env.h
+++ /dev/null
@@ -1,45 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_
-#define ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-class ScopedSetEnv {
- public:
-  ScopedSetEnv(const char* var_name, const char* new_value);
-  ~ScopedSetEnv();
-
- private:
-  std::string var_name_;
-  std::string old_value_;
-
-  // True if the environment variable was initially not set.
-  bool was_unset_;
-};
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_SCOPED_SET_ENV_H_
diff --git a/third_party/abseil/absl/base/internal/scoped_set_env_test.cc b/third_party/abseil/absl/base/internal/scoped_set_env_test.cc
deleted file mode 100644
index 5cbad24..0000000
--- a/third_party/abseil/absl/base/internal/scoped_set_env_test.cc
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/scoped_set_env.h"
-
-namespace {
-
-using absl::base_internal::ScopedSetEnv;
-
-std::string GetEnvVar(const char* name) {
-#ifdef _WIN32
-  char buf[1024];
-  auto get_res = GetEnvironmentVariableA(name, buf, sizeof(buf));
-  if (get_res >= sizeof(buf)) {
-    return "TOO_BIG";
-  }
-
-  if (get_res == 0) {
-    return "UNSET";
-  }
-
-  return std::string(buf, get_res);
-#else
-  const char* val = ::getenv(name);
-  if (val == nullptr) {
-    return "UNSET";
-  }
-
-  return val;
-#endif
-}
-
-TEST(ScopedSetEnvTest, SetNonExistingVarToString) {
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET");
-
-  {
-    ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "value");
-
-    EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value");
-  }
-
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET");
-}
-
-TEST(ScopedSetEnvTest, SetNonExistingVarToNull) {
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET");
-
-  {
-    ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", nullptr);
-
-    EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET");
-  }
-
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET");
-}
-
-TEST(ScopedSetEnvTest, SetExistingVarToString) {
-  ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "value");
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value");
-
-  {
-    ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "new_value");
-
-    EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "new_value");
-  }
-
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value");
-}
-
-TEST(ScopedSetEnvTest, SetExistingVarToNull) {
-  ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", "value");
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value");
-
-  {
-    ScopedSetEnv scoped_set("SCOPED_SET_ENV_TEST_VAR", nullptr);
-
-    EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "UNSET");
-  }
-
-  EXPECT_EQ(GetEnvVar("SCOPED_SET_ENV_TEST_VAR"), "value");
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/spinlock.cc b/third_party/abseil/absl/base/internal/spinlock.cc
deleted file mode 100644
index a7d44f3..0000000
--- a/third_party/abseil/absl/base/internal/spinlock.cc
+++ /dev/null
@@ -1,220 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/spinlock.h"
-
-#include <algorithm>
-#include <atomic>
-#include <limits>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/atomic_hook.h"
-#include "absl/base/internal/cycleclock.h"
-#include "absl/base/internal/spinlock_wait.h"
-#include "absl/base/internal/sysinfo.h" /* For NumCPUs() */
-#include "absl/base/call_once.h"
-
-// Description of lock-word:
-//  31..00: [............................3][2][1][0]
-//
-//     [0]: kSpinLockHeld
-//     [1]: kSpinLockCooperative
-//     [2]: kSpinLockDisabledScheduling
-// [31..3]: ONLY kSpinLockSleeper OR
-//          Wait time in cycles >> PROFILE_TIMESTAMP_SHIFT
-//
-// Detailed descriptions:
-//
-// Bit [0]: The lock is considered held iff kSpinLockHeld is set.
-//
-// Bit [1]: Eligible waiters (e.g. Fibers) may co-operatively reschedule when
-//          contended iff kSpinLockCooperative is set.
-//
-// Bit [2]: This bit is exclusive from bit [1].  It is used only by a
-//          non-cooperative lock.  When set, indicates that scheduling was
-//          successfully disabled when the lock was acquired.  May be unset,
-//          even if non-cooperative, if a ThreadIdentity did not yet exist at
-//          time of acquisition.
-//
-// Bit [3]: If this is the only upper bit ([31..3]) set then this lock was
-//          acquired without contention, however, at least one waiter exists.
-//
-//          Otherwise, bits [31..3] represent the time spent by the current lock
-//          holder to acquire the lock.  There may be outstanding waiter(s).
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static base_internal::AtomicHook<void (*)(
-    const void *lock, int64_t wait_cycles)>
-    submit_profile_data;
-
-void RegisterSpinLockProfiler(void (*fn)(const void *contendedlock,
-                                         int64_t wait_cycles)) {
-  submit_profile_data.Store(fn);
-}
-
-// Static member variable definitions.
-constexpr uint32_t SpinLock::kSpinLockHeld;
-constexpr uint32_t SpinLock::kSpinLockCooperative;
-constexpr uint32_t SpinLock::kSpinLockDisabledScheduling;
-constexpr uint32_t SpinLock::kSpinLockSleeper;
-constexpr uint32_t SpinLock::kWaitTimeMask;
-
-// Uncommon constructors.
-SpinLock::SpinLock(base_internal::SchedulingMode mode)
-    : lockword_(IsCooperative(mode) ? kSpinLockCooperative : 0) {
-  ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static);
-}
-
-// Monitor the lock to see if its value changes within some time period
-// (adaptive_spin_count loop iterations). The last value read from the lock
-// is returned from the method.
-uint32_t SpinLock::SpinLoop() {
-  // We are already in the slow path of SpinLock, initialize the
-  // adaptive_spin_count here.
-  ABSL_CONST_INIT static absl::once_flag init_adaptive_spin_count;
-  ABSL_CONST_INIT static int adaptive_spin_count = 0;
-  base_internal::LowLevelCallOnce(&init_adaptive_spin_count, []() {
-    adaptive_spin_count = base_internal::NumCPUs() > 1 ? 1000 : 1;
-  });
-
-  int c = adaptive_spin_count;
-  uint32_t lock_value;
-  do {
-    lock_value = lockword_.load(std::memory_order_relaxed);
-  } while ((lock_value & kSpinLockHeld) != 0 && --c > 0);
-  return lock_value;
-}
-
-void SpinLock::SlowLock() {
-  uint32_t lock_value = SpinLoop();
-  lock_value = TryLockInternal(lock_value, 0);
-  if ((lock_value & kSpinLockHeld) == 0) {
-    return;
-  }
-
-  base_internal::SchedulingMode scheduling_mode;
-  if ((lock_value & kSpinLockCooperative) != 0) {
-    scheduling_mode = base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL;
-  } else {
-    scheduling_mode = base_internal::SCHEDULE_KERNEL_ONLY;
-  }
-
-  // The lock was not obtained initially, so this thread needs to wait for
-  // it.  Record the current timestamp in the local variable wait_start_time
-  // so the total wait time can be stored in the lockword once this thread
-  // obtains the lock.
-  int64_t wait_start_time = CycleClock::Now();
-  uint32_t wait_cycles = 0;
-  int lock_wait_call_count = 0;
-  while ((lock_value & kSpinLockHeld) != 0) {
-    // If the lock is currently held, but not marked as having a sleeper, mark
-    // it as having a sleeper.
-    if ((lock_value & kWaitTimeMask) == 0) {
-      // Here, just "mark" that the thread is going to sleep.  Don't store the
-      // lock wait time in the lock as that will cause the current lock
-      // owner to think it experienced contention.
-      if (lockword_.compare_exchange_strong(
-              lock_value, lock_value | kSpinLockSleeper,
-              std::memory_order_relaxed, std::memory_order_relaxed)) {
-        // Successfully transitioned to kSpinLockSleeper.  Pass
-        // kSpinLockSleeper to the SpinLockWait routine to properly indicate
-        // the last lock_value observed.
-        lock_value |= kSpinLockSleeper;
-      } else if ((lock_value & kSpinLockHeld) == 0) {
-        // Lock is free again, so try and acquire it before sleeping.  The
-        // new lock state will be the number of cycles this thread waited if
-        // this thread obtains the lock.
-        lock_value = TryLockInternal(lock_value, wait_cycles);
-        continue;   // Skip the delay at the end of the loop.
-      }
-    }
-
-    // SpinLockDelay() calls into fiber scheduler, we need to see
-    // synchronization there to avoid false positives.
-    ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0);
-    // Wait for an OS specific delay.
-    base_internal::SpinLockDelay(&lockword_, lock_value, ++lock_wait_call_count,
-                                 scheduling_mode);
-    ABSL_TSAN_MUTEX_POST_DIVERT(this, 0);
-    // Spin again after returning from the wait routine to give this thread
-    // some chance of obtaining the lock.
-    lock_value = SpinLoop();
-    wait_cycles = EncodeWaitCycles(wait_start_time, CycleClock::Now());
-    lock_value = TryLockInternal(lock_value, wait_cycles);
-  }
-}
-
-void SpinLock::SlowUnlock(uint32_t lock_value) {
-  base_internal::SpinLockWake(&lockword_,
-                              false);  // wake waiter if necessary
-
-  // If our acquisition was contended, collect contentionz profile info.  We
-  // reserve a unitary wait time to represent that a waiter exists without our
-  // own acquisition having been contended.
-  if ((lock_value & kWaitTimeMask) != kSpinLockSleeper) {
-    const uint64_t wait_cycles = DecodeWaitCycles(lock_value);
-    ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0);
-    submit_profile_data(this, wait_cycles);
-    ABSL_TSAN_MUTEX_POST_DIVERT(this, 0);
-  }
-}
-
-// We use the upper 29 bits of the lock word to store the time spent waiting to
-// acquire this lock.  This is reported by contentionz profiling.  Since the
-// lower bits of the cycle counter wrap very quickly on high-frequency
-// processors we divide to reduce the granularity to 2^kProfileTimestampShift
-// sized units.  On a 4Ghz machine this will lose track of wait times greater
-// than (2^29/4 Ghz)*128 =~ 17.2 seconds.  Such waits should be extremely rare.
-static constexpr int kProfileTimestampShift = 7;
-
-// We currently reserve the lower 3 bits.
-static constexpr int kLockwordReservedShift = 3;
-
-uint32_t SpinLock::EncodeWaitCycles(int64_t wait_start_time,
-                                    int64_t wait_end_time) {
-  static const int64_t kMaxWaitTime =
-      std::numeric_limits<uint32_t>::max() >> kLockwordReservedShift;
-  int64_t scaled_wait_time =
-      (wait_end_time - wait_start_time) >> kProfileTimestampShift;
-
-  // Return a representation of the time spent waiting that can be stored in
-  // the lock word's upper bits.
-  uint32_t clamped = static_cast<uint32_t>(
-      std::min(scaled_wait_time, kMaxWaitTime) << kLockwordReservedShift);
-
-  if (clamped == 0) {
-    return kSpinLockSleeper;  // Just wake waiters, but don't record contention.
-  }
-  // Bump up value if necessary to avoid returning kSpinLockSleeper.
-  const uint32_t kMinWaitTime =
-      kSpinLockSleeper + (1 << kLockwordReservedShift);
-  if (clamped == kSpinLockSleeper) {
-    return kMinWaitTime;
-  }
-  return clamped;
-}
-
-uint64_t SpinLock::DecodeWaitCycles(uint32_t lock_value) {
-  // Cast to uint32_t first to ensure bits [63:32] are cleared.
-  const uint64_t scaled_wait_time =
-      static_cast<uint32_t>(lock_value & kWaitTimeMask);
-  return scaled_wait_time << (kProfileTimestampShift - kLockwordReservedShift);
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/spinlock.h b/third_party/abseil/absl/base/internal/spinlock.h
deleted file mode 100644
index dce1c85..0000000
--- a/third_party/abseil/absl/base/internal/spinlock.h
+++ /dev/null
@@ -1,234 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-//  Most users requiring mutual exclusion should use Mutex.
-//  SpinLock is provided for use in two situations:
-//   - for use in code that Mutex itself depends on
-//   - for async signal safety (see below)
-
-// SpinLock is async signal safe.  If a spinlock is used within a signal
-// handler, all code that acquires the lock must ensure that the signal cannot
-// arrive while they are holding the lock.  Typically, this is done by blocking
-// the signal.
-
-#ifndef ABSL_BASE_INTERNAL_SPINLOCK_H_
-#define ABSL_BASE_INTERNAL_SPINLOCK_H_
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <atomic>
-
-#include "absl/base/attributes.h"
-#include "absl/base/const_init.h"
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/low_level_scheduling.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/internal/tsan_mutex_interface.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/base/thread_annotations.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-class ABSL_LOCKABLE SpinLock {
- public:
-  SpinLock() : lockword_(kSpinLockCooperative) {
-    ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static);
-  }
-
-  // Constructors that allow non-cooperative spinlocks to be created for use
-  // inside thread schedulers.  Normal clients should not use these.
-  explicit SpinLock(base_internal::SchedulingMode mode);
-
-  // Constructor for global SpinLock instances.  See absl/base/const_init.h.
-  constexpr SpinLock(absl::ConstInitType, base_internal::SchedulingMode mode)
-      : lockword_(IsCooperative(mode) ? kSpinLockCooperative : 0) {}
-
-  // For global SpinLock instances prefer trivial destructor when possible.
-  // Default but non-trivial destructor in some build configurations causes an
-  // extra static initializer.
-#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-  ~SpinLock() { ABSL_TSAN_MUTEX_DESTROY(this, __tsan_mutex_not_static); }
-#else
-  ~SpinLock() = default;
-#endif
-
-  // Acquire this SpinLock.
-  inline void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION() {
-    ABSL_TSAN_MUTEX_PRE_LOCK(this, 0);
-    if (!TryLockImpl()) {
-      SlowLock();
-    }
-    ABSL_TSAN_MUTEX_POST_LOCK(this, 0, 0);
-  }
-
-  // Try to acquire this SpinLock without blocking and return true if the
-  // acquisition was successful.  If the lock was not acquired, false is
-  // returned.  If this SpinLock is free at the time of the call, TryLock
-  // will return true with high probability.
-  inline bool TryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
-    ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_try_lock);
-    bool res = TryLockImpl();
-    ABSL_TSAN_MUTEX_POST_LOCK(
-        this, __tsan_mutex_try_lock | (res ? 0 : __tsan_mutex_try_lock_failed),
-        0);
-    return res;
-  }
-
-  // Release this SpinLock, which must be held by the calling thread.
-  inline void Unlock() ABSL_UNLOCK_FUNCTION() {
-    ABSL_TSAN_MUTEX_PRE_UNLOCK(this, 0);
-    uint32_t lock_value = lockword_.load(std::memory_order_relaxed);
-    lock_value = lockword_.exchange(lock_value & kSpinLockCooperative,
-                                    std::memory_order_release);
-
-    if ((lock_value & kSpinLockDisabledScheduling) != 0) {
-      base_internal::SchedulingGuard::EnableRescheduling(true);
-    }
-    if ((lock_value & kWaitTimeMask) != 0) {
-      // Collect contentionz profile info, and speed the wakeup of any waiter.
-      // The wait_cycles value indicates how long this thread spent waiting
-      // for the lock.
-      SlowUnlock(lock_value);
-    }
-    ABSL_TSAN_MUTEX_POST_UNLOCK(this, 0);
-  }
-
-  // Determine if the lock is held.  When the lock is held by the invoking
-  // thread, true will always be returned. Intended to be used as
-  // CHECK(lock.IsHeld()).
-  inline bool IsHeld() const {
-    return (lockword_.load(std::memory_order_relaxed) & kSpinLockHeld) != 0;
-  }
-
- protected:
-  // These should not be exported except for testing.
-
-  // Store number of cycles between wait_start_time and wait_end_time in a
-  // lock value.
-  static uint32_t EncodeWaitCycles(int64_t wait_start_time,
-                                   int64_t wait_end_time);
-
-  // Extract number of wait cycles in a lock value.
-  static uint64_t DecodeWaitCycles(uint32_t lock_value);
-
-  // Provide access to protected method above.  Use for testing only.
-  friend struct SpinLockTest;
-
- private:
-  // lockword_ is used to store the following:
-  //
-  // bit[0] encodes whether a lock is being held.
-  // bit[1] encodes whether a lock uses cooperative scheduling.
-  // bit[2] encodes whether a lock disables scheduling.
-  // bit[3:31] encodes time a lock spent on waiting as a 29-bit unsigned int.
-  static constexpr uint32_t kSpinLockHeld = 1;
-  static constexpr uint32_t kSpinLockCooperative = 2;
-  static constexpr uint32_t kSpinLockDisabledScheduling = 4;
-  static constexpr uint32_t kSpinLockSleeper = 8;
-  // Includes kSpinLockSleeper.
-  static constexpr uint32_t kWaitTimeMask =
-      ~(kSpinLockHeld | kSpinLockCooperative | kSpinLockDisabledScheduling);
-
-  // Returns true if the provided scheduling mode is cooperative.
-  static constexpr bool IsCooperative(
-      base_internal::SchedulingMode scheduling_mode) {
-    return scheduling_mode == base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL;
-  }
-
-  uint32_t TryLockInternal(uint32_t lock_value, uint32_t wait_cycles);
-  void SlowLock() ABSL_ATTRIBUTE_COLD;
-  void SlowUnlock(uint32_t lock_value) ABSL_ATTRIBUTE_COLD;
-  uint32_t SpinLoop();
-
-  inline bool TryLockImpl() {
-    uint32_t lock_value = lockword_.load(std::memory_order_relaxed);
-    return (TryLockInternal(lock_value, 0) & kSpinLockHeld) == 0;
-  }
-
-  std::atomic<uint32_t> lockword_;
-
-  SpinLock(const SpinLock&) = delete;
-  SpinLock& operator=(const SpinLock&) = delete;
-};
-
-// Corresponding locker object that arranges to acquire a spinlock for
-// the duration of a C++ scope.
-class ABSL_SCOPED_LOCKABLE SpinLockHolder {
- public:
-  inline explicit SpinLockHolder(SpinLock* l) ABSL_EXCLUSIVE_LOCK_FUNCTION(l)
-      : lock_(l) {
-    l->Lock();
-  }
-  inline ~SpinLockHolder() ABSL_UNLOCK_FUNCTION() { lock_->Unlock(); }
-
-  SpinLockHolder(const SpinLockHolder&) = delete;
-  SpinLockHolder& operator=(const SpinLockHolder&) = delete;
-
- private:
-  SpinLock* lock_;
-};
-
-// Register a hook for profiling support.
-//
-// The function pointer registered here will be called whenever a spinlock is
-// contended.  The callback is given an opaque handle to the contended spinlock
-// and the number of wait cycles.  This is thread-safe, but only a single
-// profiler can be registered.  It is an error to call this function multiple
-// times with different arguments.
-void RegisterSpinLockProfiler(void (*fn)(const void* lock,
-                                         int64_t wait_cycles));
-
-//------------------------------------------------------------------------------
-// Public interface ends here.
-//------------------------------------------------------------------------------
-
-// If (result & kSpinLockHeld) == 0, then *this was successfully locked.
-// Otherwise, returns last observed value for lockword_.
-inline uint32_t SpinLock::TryLockInternal(uint32_t lock_value,
-                                          uint32_t wait_cycles) {
-  if ((lock_value & kSpinLockHeld) != 0) {
-    return lock_value;
-  }
-
-  uint32_t sched_disabled_bit = 0;
-  if ((lock_value & kSpinLockCooperative) == 0) {
-    // For non-cooperative locks we must make sure we mark ourselves as
-    // non-reschedulable before we attempt to CompareAndSwap.
-    if (base_internal::SchedulingGuard::DisableRescheduling()) {
-      sched_disabled_bit = kSpinLockDisabledScheduling;
-    }
-  }
-
-  if (!lockword_.compare_exchange_strong(
-          lock_value,
-          kSpinLockHeld | lock_value | wait_cycles | sched_disabled_bit,
-          std::memory_order_acquire, std::memory_order_relaxed)) {
-    base_internal::SchedulingGuard::EnableRescheduling(sched_disabled_bit != 0);
-  }
-
-  return lock_value;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_SPINLOCK_H_
diff --git a/third_party/abseil/absl/base/internal/spinlock_akaros.inc b/third_party/abseil/absl/base/internal/spinlock_akaros.inc
deleted file mode 100644
index bc46894..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_akaros.inc
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file is an Akaros-specific part of spinlock_wait.cc
-
-#include <atomic>
-
-#include "absl/base/internal/scheduling_mode.h"
-
-extern "C" {
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay(
-    std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */,
-    int /* loop */, absl::base_internal::SchedulingMode /* mode */) {
-  // In Akaros, one must take care not to call anything that could cause a
-  // malloc(), a blocking system call, or a uthread_yield() while holding a
-  // spinlock. Our callers assume will not call into libraries or other
-  // arbitrary code.
-}
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake(
-    std::atomic<uint32_t>* /* lock_word */, bool /* all */) {}
-
-}  // extern "C"
diff --git a/third_party/abseil/absl/base/internal/spinlock_benchmark.cc b/third_party/abseil/absl/base/internal/spinlock_benchmark.cc
deleted file mode 100644
index 0451c65..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_benchmark.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// See also //absl/synchronization:mutex_benchmark for a comparison of SpinLock
-// and Mutex performance under varying levels of contention.
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/synchronization/internal/create_thread_identity.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-template <absl::base_internal::SchedulingMode scheduling_mode>
-static void BM_SpinLock(benchmark::State& state) {
-  // Ensure a ThreadIdentity is installed.
-  ABSL_INTERNAL_CHECK(
-      absl::synchronization_internal::GetOrCreateCurrentThreadIdentity() !=
-          nullptr,
-      "GetOrCreateCurrentThreadIdentity() failed");
-
-  static auto* spinlock = new absl::base_internal::SpinLock(scheduling_mode);
-  for (auto _ : state) {
-    absl::base_internal::SpinLockHolder holder(spinlock);
-  }
-}
-
-BENCHMARK_TEMPLATE(BM_SpinLock,
-                   absl::base_internal::SCHEDULE_KERNEL_ONLY)
-    ->UseRealTime()
-    ->Threads(1)
-    ->ThreadPerCpu();
-
-BENCHMARK_TEMPLATE(BM_SpinLock,
-                   absl::base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL)
-    ->UseRealTime()
-    ->Threads(1)
-    ->ThreadPerCpu();
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/spinlock_linux.inc b/third_party/abseil/absl/base/internal/spinlock_linux.inc
deleted file mode 100644
index e31c6ed..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_linux.inc
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file is a Linux-specific part of spinlock_wait.cc
-
-#include <linux/futex.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#include <atomic>
-#include <climits>
-#include <cstdint>
-#include <ctime>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/errno_saver.h"
-
-// The SpinLock lockword is `std::atomic<uint32_t>`. Here we assert that
-// `std::atomic<uint32_t>` is bitwise equivalent of the `int` expected
-// by SYS_futex. We also assume that reads/writes done to the lockword
-// by SYS_futex have rational semantics with regard to the
-// std::atomic<> API. C++ provides no guarantees of these assumptions,
-// but they are believed to hold in practice.
-static_assert(sizeof(std::atomic<uint32_t>) == sizeof(int),
-              "SpinLock lockword has the wrong size for a futex");
-
-// Some Android headers are missing these definitions even though they
-// support these futex operations.
-#ifdef __BIONIC__
-#ifndef SYS_futex
-#define SYS_futex __NR_futex
-#endif
-#ifndef FUTEX_PRIVATE_FLAG
-#define FUTEX_PRIVATE_FLAG 128
-#endif
-#endif
-
-#if defined(__NR_futex_time64) && !defined(SYS_futex_time64)
-#define SYS_futex_time64 __NR_futex_time64
-#endif
-
-#if defined(SYS_futex_time64) && !defined(SYS_futex)
-#define SYS_futex SYS_futex_time64
-#endif
-
-extern "C" {
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay(
-    std::atomic<uint32_t> *w, uint32_t value, int loop,
-    absl::base_internal::SchedulingMode) {
-  absl::base_internal::ErrnoSaver errno_saver;
-  struct timespec tm;
-  tm.tv_sec = 0;
-  tm.tv_nsec = absl::base_internal::SpinLockSuggestedDelayNS(loop);
-  syscall(SYS_futex, w, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, value, &tm);
-}
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake(std::atomic<uint32_t> *w,
-                                                  bool all) {
-  syscall(SYS_futex, w, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, all ? INT_MAX : 1, 0);
-}
-
-}  // extern "C"
diff --git a/third_party/abseil/absl/base/internal/spinlock_posix.inc b/third_party/abseil/absl/base/internal/spinlock_posix.inc
deleted file mode 100644
index fcd21b1..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_posix.inc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file is a Posix-specific part of spinlock_wait.cc
-
-#include <sched.h>
-
-#include <atomic>
-#include <ctime>
-
-#include "absl/base/internal/errno_saver.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/port.h"
-
-extern "C" {
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay(
-    std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, int loop,
-    absl::base_internal::SchedulingMode /* mode */) {
-  absl::base_internal::ErrnoSaver errno_saver;
-  if (loop == 0) {
-  } else if (loop == 1) {
-    sched_yield();
-  } else {
-    struct timespec tm;
-    tm.tv_sec = 0;
-    tm.tv_nsec = absl::base_internal::SpinLockSuggestedDelayNS(loop);
-    nanosleep(&tm, nullptr);
-  }
-}
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake(
-    std::atomic<uint32_t>* /* lock_word */, bool /* all */) {}
-
-}  // extern "C"
diff --git a/third_party/abseil/absl/base/internal/spinlock_wait.cc b/third_party/abseil/absl/base/internal/spinlock_wait.cc
deleted file mode 100644
index fa824be..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_wait.cc
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// The OS-specific header included below must provide two calls:
-// AbslInternalSpinLockDelay() and AbslInternalSpinLockWake().
-// See spinlock_wait.h for the specs.
-
-#include <atomic>
-#include <cstdint>
-
-#include "absl/base/internal/spinlock_wait.h"
-
-#if defined(_WIN32)
-#include "absl/base/internal/spinlock_win32.inc"
-#elif defined(__linux__)
-#include "absl/base/internal/spinlock_linux.inc"
-#elif defined(__akaros__)
-#include "absl/base/internal/spinlock_akaros.inc"
-#else
-#include "absl/base/internal/spinlock_posix.inc"
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// See spinlock_wait.h for spec.
-uint32_t SpinLockWait(std::atomic<uint32_t> *w, int n,
-                      const SpinLockWaitTransition trans[],
-                      base_internal::SchedulingMode scheduling_mode) {
-  int loop = 0;
-  for (;;) {
-    uint32_t v = w->load(std::memory_order_acquire);
-    int i;
-    for (i = 0; i != n && v != trans[i].from; i++) {
-    }
-    if (i == n) {
-      SpinLockDelay(w, v, ++loop, scheduling_mode);  // no matching transition
-    } else if (trans[i].to == v ||                   // null transition
-               w->compare_exchange_strong(v, trans[i].to,
-                                          std::memory_order_acquire,
-                                          std::memory_order_relaxed)) {
-      if (trans[i].done) return v;
-    }
-  }
-}
-
-static std::atomic<uint64_t> delay_rand;
-
-// Return a suggested delay in nanoseconds for iteration number "loop"
-int SpinLockSuggestedDelayNS(int loop) {
-  // Weak pseudo-random number generator to get some spread between threads
-  // when many are spinning.
-  uint64_t r = delay_rand.load(std::memory_order_relaxed);
-  r = 0x5deece66dLL * r + 0xb;   // numbers from nrand48()
-  delay_rand.store(r, std::memory_order_relaxed);
-
-  if (loop < 0 || loop > 32) {   // limit loop to 0..32
-    loop = 32;
-  }
-  const int kMinDelay = 128 << 10;  // 128us
-  // Double delay every 8 iterations, up to 16x (2ms).
-  int delay = kMinDelay << (loop / 8);
-  // Randomize in delay..2*delay range, for resulting 128us..4ms range.
-  return delay | ((delay - 1) & static_cast<int>(r));
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/spinlock_wait.h b/third_party/abseil/absl/base/internal/spinlock_wait.h
deleted file mode 100644
index c34ce41..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_wait.h
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_SPINLOCK_WAIT_H_
-#define ABSL_BASE_INTERNAL_SPINLOCK_WAIT_H_
-
-// Operations to make atomic transitions on a word, and to allow
-// waiting for those transitions to become possible.
-
-#include <stdint.h>
-#include <atomic>
-
-#include "absl/base/internal/scheduling_mode.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// SpinLockWait() waits until it can perform one of several transitions from
-// "from" to "to".  It returns when it performs a transition where done==true.
-struct SpinLockWaitTransition {
-  uint32_t from;
-  uint32_t to;
-  bool done;
-};
-
-// Wait until *w can transition from trans[i].from to trans[i].to for some i
-// satisfying 0<=i<n && trans[i].done, atomically make the transition,
-// then return the old value of *w.   Make any other atomic transitions
-// where !trans[i].done, but continue waiting.
-uint32_t SpinLockWait(std::atomic<uint32_t> *w, int n,
-                      const SpinLockWaitTransition trans[],
-                      SchedulingMode scheduling_mode);
-
-// If possible, wake some thread that has called SpinLockDelay(w, ...). If `all`
-// is true, wake all such threads. On some systems, this may be a no-op; on
-// those systems, threads calling SpinLockDelay() will always wake eventually
-// even if SpinLockWake() is never called.
-void SpinLockWake(std::atomic<uint32_t> *w, bool all);
-
-// Wait for an appropriate spin delay on iteration "loop" of a
-// spin loop on location *w, whose previously observed value was "value".
-// SpinLockDelay() may do nothing, may yield the CPU, may sleep a clock tick,
-// or may wait for a call to SpinLockWake(w).
-void SpinLockDelay(std::atomic<uint32_t> *w, uint32_t value, int loop,
-                   base_internal::SchedulingMode scheduling_mode);
-
-// Helper used by AbslInternalSpinLockDelay.
-// Returns a suggested delay in nanoseconds for iteration number "loop".
-int SpinLockSuggestedDelayNS(int loop);
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// In some build configurations we pass --detect-odr-violations to the
-// gold linker.  This causes it to flag weak symbol overrides as ODR
-// violations.  Because ODR only applies to C++ and not C,
-// --detect-odr-violations ignores symbols not mangled with C++ names.
-// By changing our extension points to be extern "C", we dodge this
-// check.
-extern "C" {
-void AbslInternalSpinLockWake(std::atomic<uint32_t> *w, bool all);
-void AbslInternalSpinLockDelay(
-    std::atomic<uint32_t> *w, uint32_t value, int loop,
-    absl::base_internal::SchedulingMode scheduling_mode);
-}
-
-inline void absl::base_internal::SpinLockWake(std::atomic<uint32_t> *w,
-                                              bool all) {
-  AbslInternalSpinLockWake(w, all);
-}
-
-inline void absl::base_internal::SpinLockDelay(
-    std::atomic<uint32_t> *w, uint32_t value, int loop,
-    absl::base_internal::SchedulingMode scheduling_mode) {
-  AbslInternalSpinLockDelay(w, value, loop, scheduling_mode);
-}
-
-#endif  // ABSL_BASE_INTERNAL_SPINLOCK_WAIT_H_
diff --git a/third_party/abseil/absl/base/internal/spinlock_win32.inc b/third_party/abseil/absl/base/internal/spinlock_win32.inc
deleted file mode 100644
index 78654b5..0000000
--- a/third_party/abseil/absl/base/internal/spinlock_win32.inc
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file is a Win32-specific part of spinlock_wait.cc
-
-#include <windows.h>
-#include <atomic>
-#include "absl/base/internal/scheduling_mode.h"
-
-extern "C" {
-
-void AbslInternalSpinLockDelay(std::atomic<uint32_t>* /* lock_word */,
-                               uint32_t /* value */, int loop,
-                               absl::base_internal::SchedulingMode /* mode */) {
-  if (loop == 0) {
-  } else if (loop == 1) {
-    Sleep(0);
-  } else {
-    Sleep(absl::base_internal::SpinLockSuggestedDelayNS(loop) / 1000000);
-  }
-}
-
-void AbslInternalSpinLockWake(std::atomic<uint32_t>* /* lock_word */,
-                              bool /* all */) {}
-
-}  // extern "C"
diff --git a/third_party/abseil/absl/base/internal/strerror.cc b/third_party/abseil/absl/base/internal/strerror.cc
deleted file mode 100644
index 0d6226f..0000000
--- a/third_party/abseil/absl/base/internal/strerror.cc
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/strerror.h"
-
-#include <array>
-#include <cerrno>
-#include <cstddef>
-#include <cstdio>
-#include <cstring>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/internal/errno_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-const char* StrErrorAdaptor(int errnum, char* buf, size_t buflen) {
-#if defined(_WIN32)
-  int rc = strerror_s(buf, buflen, errnum);
-  buf[buflen - 1] = '\0';  // guarantee NUL termination
-  if (rc == 0 && strncmp(buf, "Unknown error", buflen) == 0) *buf = '\0';
-  return buf;
-#else
-  // The type of `ret` is platform-specific; both of these branches must compile
-  // either way but only one will execute on any given platform:
-  auto ret = strerror_r(errnum, buf, buflen);
-  if (std::is_same<decltype(ret), int>::value) {
-    // XSI `strerror_r`; `ret` is `int`:
-    if (ret) *buf = '\0';
-    return buf;
-  } else {
-    // GNU `strerror_r`; `ret` is `char *`:
-    return reinterpret_cast<const char*>(ret);
-  }
-#endif
-}
-
-std::string StrErrorInternal(int errnum) {
-  char buf[100];
-  const char* str = StrErrorAdaptor(errnum, buf, sizeof buf);
-  if (*str == '\0') {
-    snprintf(buf, sizeof buf, "Unknown error %d", errnum);
-    str = buf;
-  }
-  return str;
-}
-
-// kSysNerr is the number of errors from a recent glibc. `StrError()` falls back
-// to `StrErrorAdaptor()` if the value is larger than this.
-constexpr int kSysNerr = 135;
-
-std::array<std::string, kSysNerr>* NewStrErrorTable() {
-  auto* table = new std::array<std::string, kSysNerr>;
-  for (int i = 0; i < static_cast<int>(table->size()); ++i) {
-    (*table)[i] = StrErrorInternal(i);
-  }
-  return table;
-}
-
-}  // namespace
-
-std::string StrError(int errnum) {
-  absl::base_internal::ErrnoSaver errno_saver;
-  static const auto* table = NewStrErrorTable();
-  if (errnum >= 0 && errnum < static_cast<int>(table->size())) {
-    return (*table)[errnum];
-  }
-  return StrErrorInternal(errnum);
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/strerror.h b/third_party/abseil/absl/base/internal/strerror.h
deleted file mode 100644
index 3500973..0000000
--- a/third_party/abseil/absl/base/internal/strerror.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_INTERNAL_STRERROR_H_
-#define ABSL_BASE_INTERNAL_STRERROR_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// A portable and thread-safe alternative to C89's `strerror`.
-//
-// The C89 specification of `strerror` is not suitable for use in a
-// multi-threaded application as the returned string may be changed by calls to
-// `strerror` from another thread.  The many non-stdlib alternatives differ
-// enough in their names, availability, and semantics to justify this wrapper
-// around them.  `errno` will not be modified by a call to `absl::StrError`.
-std::string StrError(int errnum);
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_STRERROR_H_
diff --git a/third_party/abseil/absl/base/internal/strerror_benchmark.cc b/third_party/abseil/absl/base/internal/strerror_benchmark.cc
deleted file mode 100644
index c9ab14a..0000000
--- a/third_party/abseil/absl/base/internal/strerror_benchmark.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cerrno>
-#include <cstdio>
-#include <string>
-
-#include "absl/base/internal/strerror.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-void BM_AbslStrError(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::base_internal::StrError(ERANGE));
-  }
-}
-BENCHMARK(BM_AbslStrError);
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/strerror_test.cc b/third_party/abseil/absl/base/internal/strerror_test.cc
deleted file mode 100644
index e32d5b5..0000000
--- a/third_party/abseil/absl/base/internal/strerror_test.cc
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/strerror.h"
-
-#include <atomic>
-#include <cerrno>
-#include <cstdio>
-#include <cstring>
-#include <string>
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/match.h"
-
-namespace {
-using ::testing::AnyOf;
-using ::testing::Eq;
-
-TEST(StrErrorTest, ValidErrorCode) {
-  errno = ERANGE;
-  EXPECT_THAT(absl::base_internal::StrError(EDOM), Eq(strerror(EDOM)));
-  EXPECT_THAT(errno, Eq(ERANGE));
-}
-
-TEST(StrErrorTest, InvalidErrorCode) {
-  errno = ERANGE;
-  EXPECT_THAT(absl::base_internal::StrError(-1),
-              AnyOf(Eq("No error information"), Eq("Unknown error -1")));
-  EXPECT_THAT(errno, Eq(ERANGE));
-}
-
-TEST(StrErrorTest, MultipleThreads) {
-  // In this test, we will start up 2 threads and have each one call
-  // StrError 1000 times, each time with a different errnum.  We
-  // expect that StrError(errnum) will return a string equal to the
-  // one returned by strerror(errnum), if the code is known.  Since
-  // strerror is known to be thread-hostile, collect all the expected
-  // strings up front.
-  const int kNumCodes = 1000;
-  std::vector<std::string> expected_strings(kNumCodes);
-  for (int i = 0; i < kNumCodes; ++i) {
-    expected_strings[i] = strerror(i);
-  }
-
-  std::atomic_int counter(0);
-  auto thread_fun = [&]() {
-    for (int i = 0; i < kNumCodes; ++i) {
-      ++counter;
-      errno = ERANGE;
-      const std::string value = absl::base_internal::StrError(i);
-      // EXPECT_* could change errno. Stash it first.
-      int check_err = errno;
-      EXPECT_THAT(check_err, Eq(ERANGE));
-      // Only the GNU implementation is guaranteed to provide the
-      // string "Unknown error nnn". POSIX doesn't say anything.
-      if (!absl::StartsWith(value, "Unknown error ")) {
-        EXPECT_THAT(value, Eq(expected_strings[i]));
-      }
-    }
-  };
-
-  const int kNumThreads = 100;
-  std::vector<std::thread> threads;
-  for (int i = 0; i < kNumThreads; ++i) {
-    threads.push_back(std::thread(thread_fun));
-  }
-  for (auto& thread : threads) {
-    thread.join();
-  }
-
-  EXPECT_THAT(counter, Eq(kNumThreads * kNumCodes));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/sysinfo.cc b/third_party/abseil/absl/base/internal/sysinfo.cc
deleted file mode 100644
index 4a3b205..0000000
--- a/third_party/abseil/absl/base/internal/sysinfo.cc
+++ /dev/null
@@ -1,439 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/sysinfo.h"
-
-#include "absl/base/attributes.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#else
-#include <fcntl.h>
-#include <pthread.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#endif
-
-#ifdef __linux__
-#include <sys/syscall.h>
-#endif
-
-#if defined(__APPLE__) || defined(__FreeBSD__)
-#include <sys/sysctl.h>
-#endif
-
-#if defined(__myriad2__)
-#include <rtems.h>
-#endif
-
-#include <string.h>
-
-#include <cassert>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <ctime>
-#include <limits>
-#include <thread>  // NOLINT(build/c++11)
-#include <utility>
-#include <vector>
-
-#include "absl/base/call_once.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/internal/unscaledcycleclock.h"
-#include "absl/base/thread_annotations.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-static int GetNumCPUs() {
-#if defined(__myriad2__)
-  return 1;
-#else
-  // Other possibilities:
-  //  - Read /sys/devices/system/cpu/online and use cpumask_parse()
-  //  - sysconf(_SC_NPROCESSORS_ONLN)
-  return std::thread::hardware_concurrency();
-#endif
-}
-
-#if defined(_WIN32)
-
-static double GetNominalCPUFrequency() {
-#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && \
-    !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-  // UWP apps don't have access to the registry and currently don't provide an
-  // API informing about CPU nominal frequency.
-  return 1.0;
-#else
-#pragma comment(lib, "advapi32.lib")  // For Reg* functions.
-  HKEY key;
-  // Use the Reg* functions rather than the SH functions because shlwapi.dll
-  // pulls in gdi32.dll which makes process destruction much more costly.
-  if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,
-                    "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", 0,
-                    KEY_READ, &key) == ERROR_SUCCESS) {
-    DWORD type = 0;
-    DWORD data = 0;
-    DWORD data_size = sizeof(data);
-    auto result = RegQueryValueExA(key, "~MHz", 0, &type,
-                                   reinterpret_cast<LPBYTE>(&data), &data_size);
-    RegCloseKey(key);
-    if (result == ERROR_SUCCESS && type == REG_DWORD &&
-        data_size == sizeof(data)) {
-      return data * 1e6;  // Value is MHz.
-    }
-  }
-  return 1.0;
-#endif  // WINAPI_PARTITION_APP && !WINAPI_PARTITION_DESKTOP
-}
-
-#elif defined(CTL_HW) && defined(HW_CPU_FREQ)
-
-static double GetNominalCPUFrequency() {
-  unsigned freq;
-  size_t size = sizeof(freq);
-  int mib[2] = {CTL_HW, HW_CPU_FREQ};
-  if (sysctl(mib, 2, &freq, &size, nullptr, 0) == 0) {
-    return static_cast<double>(freq);
-  }
-  return 1.0;
-}
-
-#else
-
-// Helper function for reading a long from a file. Returns true if successful
-// and the memory location pointed to by value is set to the value read.
-static bool ReadLongFromFile(const char *file, long *value) {
-  bool ret = false;
-  int fd = open(file, O_RDONLY);
-  if (fd != -1) {
-    char line[1024];
-    char *err;
-    memset(line, '\0', sizeof(line));
-    int len = read(fd, line, sizeof(line) - 1);
-    if (len <= 0) {
-      ret = false;
-    } else {
-      const long temp_value = strtol(line, &err, 10);
-      if (line[0] != '\0' && (*err == '\n' || *err == '\0')) {
-        *value = temp_value;
-        ret = true;
-      }
-    }
-    close(fd);
-  }
-  return ret;
-}
-
-#if defined(ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY)
-
-// Reads a monotonic time source and returns a value in
-// nanoseconds. The returned value uses an arbitrary epoch, not the
-// Unix epoch.
-static int64_t ReadMonotonicClockNanos() {
-  struct timespec t;
-#ifdef CLOCK_MONOTONIC_RAW
-  int rc = clock_gettime(CLOCK_MONOTONIC_RAW, &t);
-#else
-  int rc = clock_gettime(CLOCK_MONOTONIC, &t);
-#endif
-  if (rc != 0) {
-    perror("clock_gettime() failed");
-    abort();
-  }
-  return int64_t{t.tv_sec} * 1000000000 + t.tv_nsec;
-}
-
-class UnscaledCycleClockWrapperForInitializeFrequency {
- public:
-  static int64_t Now() { return base_internal::UnscaledCycleClock::Now(); }
-};
-
-struct TimeTscPair {
-  int64_t time;  // From ReadMonotonicClockNanos().
-  int64_t tsc;   // From UnscaledCycleClock::Now().
-};
-
-// Returns a pair of values (monotonic kernel time, TSC ticks) that
-// approximately correspond to each other.  This is accomplished by
-// doing several reads and picking the reading with the lowest
-// latency.  This approach is used to minimize the probability that
-// our thread was preempted between clock reads.
-static TimeTscPair GetTimeTscPair() {
-  int64_t best_latency = std::numeric_limits<int64_t>::max();
-  TimeTscPair best;
-  for (int i = 0; i < 10; ++i) {
-    int64_t t0 = ReadMonotonicClockNanos();
-    int64_t tsc = UnscaledCycleClockWrapperForInitializeFrequency::Now();
-    int64_t t1 = ReadMonotonicClockNanos();
-    int64_t latency = t1 - t0;
-    if (latency < best_latency) {
-      best_latency = latency;
-      best.time = t0;
-      best.tsc = tsc;
-    }
-  }
-  return best;
-}
-
-// Measures and returns the TSC frequency by taking a pair of
-// measurements approximately `sleep_nanoseconds` apart.
-static double MeasureTscFrequencyWithSleep(int sleep_nanoseconds) {
-  auto t0 = GetTimeTscPair();
-  struct timespec ts;
-  ts.tv_sec = 0;
-  ts.tv_nsec = sleep_nanoseconds;
-  while (nanosleep(&ts, &ts) != 0 && errno == EINTR) {}
-  auto t1 = GetTimeTscPair();
-  double elapsed_ticks = t1.tsc - t0.tsc;
-  double elapsed_time = (t1.time - t0.time) * 1e-9;
-  return elapsed_ticks / elapsed_time;
-}
-
-// Measures and returns the TSC frequency by calling
-// MeasureTscFrequencyWithSleep(), doubling the sleep interval until the
-// frequency measurement stabilizes.
-static double MeasureTscFrequency() {
-  double last_measurement = -1.0;
-  int sleep_nanoseconds = 1000000;  // 1 millisecond.
-  for (int i = 0; i < 8; ++i) {
-    double measurement = MeasureTscFrequencyWithSleep(sleep_nanoseconds);
-    if (measurement * 0.99 < last_measurement &&
-        last_measurement < measurement * 1.01) {
-      // Use the current measurement if it is within 1% of the
-      // previous measurement.
-      return measurement;
-    }
-    last_measurement = measurement;
-    sleep_nanoseconds *= 2;
-  }
-  return last_measurement;
-}
-
-#endif  // ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
-
-static double GetNominalCPUFrequency() {
-  long freq = 0;
-
-  // Google's production kernel has a patch to export the TSC
-  // frequency through sysfs. If the kernel is exporting the TSC
-  // frequency use that. There are issues where cpuinfo_max_freq
-  // cannot be relied on because the BIOS may be exporting an invalid
-  // p-state (on x86) or p-states may be used to put the processor in
-  // a new mode (turbo mode). Essentially, those frequencies cannot
-  // always be relied upon. The same reasons apply to /proc/cpuinfo as
-  // well.
-  if (ReadLongFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)) {
-    return freq * 1e3;  // Value is kHz.
-  }
-
-#if defined(ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY)
-  // On these platforms, the TSC frequency is the nominal CPU
-  // frequency.  But without having the kernel export it directly
-  // though /sys/devices/system/cpu/cpu0/tsc_freq_khz, there is no
-  // other way to reliably get the TSC frequency, so we have to
-  // measure it ourselves.  Some CPUs abuse cpuinfo_max_freq by
-  // exporting "fake" frequencies for implementing new features. For
-  // example, Intel's turbo mode is enabled by exposing a p-state
-  // value with a higher frequency than that of the real TSC
-  // rate. Because of this, we prefer to measure the TSC rate
-  // ourselves on i386 and x86-64.
-  return MeasureTscFrequency();
-#else
-
-  // If CPU scaling is in effect, we want to use the *maximum*
-  // frequency, not whatever CPU speed some random processor happens
-  // to be using now.
-  if (ReadLongFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
-                       &freq)) {
-    return freq * 1e3;  // Value is kHz.
-  }
-
-  return 1.0;
-#endif  // !ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
-}
-
-#endif
-
-ABSL_CONST_INIT static once_flag init_num_cpus_once;
-ABSL_CONST_INIT static int num_cpus = 0;
-
-// NumCPUs() may be called before main() and before malloc is properly
-// initialized, therefore this must not allocate memory.
-int NumCPUs() {
-  base_internal::LowLevelCallOnce(
-      &init_num_cpus_once, []() { num_cpus = GetNumCPUs(); });
-  return num_cpus;
-}
-
-// A default frequency of 0.0 might be dangerous if it is used in division.
-ABSL_CONST_INIT static once_flag init_nominal_cpu_frequency_once;
-ABSL_CONST_INIT static double nominal_cpu_frequency = 1.0;
-
-// NominalCPUFrequency() may be called before main() and before malloc is
-// properly initialized, therefore this must not allocate memory.
-double NominalCPUFrequency() {
-  base_internal::LowLevelCallOnce(
-      &init_nominal_cpu_frequency_once,
-      []() { nominal_cpu_frequency = GetNominalCPUFrequency(); });
-  return nominal_cpu_frequency;
-}
-
-#if defined(_WIN32)
-
-pid_t GetTID() {
-  return pid_t{GetCurrentThreadId()};
-}
-
-#elif defined(__linux__)
-
-#ifndef SYS_gettid
-#define SYS_gettid __NR_gettid
-#endif
-
-pid_t GetTID() {
-  return syscall(SYS_gettid);
-}
-
-#elif defined(__akaros__)
-
-pid_t GetTID() {
-  // Akaros has a concept of "vcore context", which is the state the program
-  // is forced into when we need to make a user-level scheduling decision, or
-  // run a signal handler.  This is analogous to the interrupt context that a
-  // CPU might enter if it encounters some kind of exception.
-  //
-  // There is no current thread context in vcore context, but we need to give
-  // a reasonable answer if asked for a thread ID (e.g., in a signal handler).
-  // Thread 0 always exists, so if we are in vcore context, we return that.
-  //
-  // Otherwise, we know (since we are using pthreads) that the uthread struct
-  // current_uthread is pointing to is the first element of a
-  // struct pthread_tcb, so we extract and return the thread ID from that.
-  //
-  // TODO(dcross): Akaros anticipates moving the thread ID to the uthread
-  // structure at some point. We should modify this code to remove the cast
-  // when that happens.
-  if (in_vcore_context())
-    return 0;
-  return reinterpret_cast<struct pthread_tcb *>(current_uthread)->id;
-}
-
-#elif defined(__myriad2__)
-
-pid_t GetTID() {
-  uint32_t tid;
-  rtems_task_ident(RTEMS_SELF, 0, &tid);
-  return tid;
-}
-
-#else
-
-// Fallback implementation of GetTID using pthread_getspecific.
-ABSL_CONST_INIT static once_flag tid_once;
-ABSL_CONST_INIT static pthread_key_t tid_key;
-ABSL_CONST_INIT static absl::base_internal::SpinLock tid_lock(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-
-// We set a bit per thread in this array to indicate that an ID is in
-// use. ID 0 is unused because it is the default value returned by
-// pthread_getspecific().
-ABSL_CONST_INIT static std::vector<uint32_t> *tid_array
-    ABSL_GUARDED_BY(tid_lock) = nullptr;
-static constexpr int kBitsPerWord = 32;  // tid_array is uint32_t.
-
-// Returns the TID to tid_array.
-static void FreeTID(void *v) {
-  intptr_t tid = reinterpret_cast<intptr_t>(v);
-  int word = tid / kBitsPerWord;
-  uint32_t mask = ~(1u << (tid % kBitsPerWord));
-  absl::base_internal::SpinLockHolder lock(&tid_lock);
-  assert(0 <= word && static_cast<size_t>(word) < tid_array->size());
-  (*tid_array)[word] &= mask;
-}
-
-static void InitGetTID() {
-  if (pthread_key_create(&tid_key, FreeTID) != 0) {
-    // The logging system calls GetTID() so it can't be used here.
-    perror("pthread_key_create failed");
-    abort();
-  }
-
-  // Initialize tid_array.
-  absl::base_internal::SpinLockHolder lock(&tid_lock);
-  tid_array = new std::vector<uint32_t>(1);
-  (*tid_array)[0] = 1;  // ID 0 is never-allocated.
-}
-
-// Return a per-thread small integer ID from pthread's thread-specific data.
-pid_t GetTID() {
-  absl::call_once(tid_once, InitGetTID);
-
-  intptr_t tid = reinterpret_cast<intptr_t>(pthread_getspecific(tid_key));
-  if (tid != 0) {
-    return tid;
-  }
-
-  int bit;  // tid_array[word] = 1u << bit;
-  size_t word;
-  {
-    // Search for the first unused ID.
-    absl::base_internal::SpinLockHolder lock(&tid_lock);
-    // First search for a word in the array that is not all ones.
-    word = 0;
-    while (word < tid_array->size() && ~(*tid_array)[word] == 0) {
-      ++word;
-    }
-    if (word == tid_array->size()) {
-      tid_array->push_back(0);  // No space left, add kBitsPerWord more IDs.
-    }
-    // Search for a zero bit in the word.
-    bit = 0;
-    while (bit < kBitsPerWord && (((*tid_array)[word] >> bit) & 1) != 0) {
-      ++bit;
-    }
-    tid = (word * kBitsPerWord) + bit;
-    (*tid_array)[word] |= 1u << bit;  // Mark the TID as allocated.
-  }
-
-  if (pthread_setspecific(tid_key, reinterpret_cast<void *>(tid)) != 0) {
-    perror("pthread_setspecific failed");
-    abort();
-  }
-
-  return static_cast<pid_t>(tid);
-}
-
-#endif
-
-// GetCachedTID() caches the thread ID in thread-local storage (which is a
-// userspace construct) to avoid unnecessary system calls. Without this caching,
-// it can take roughly 98ns, while it takes roughly 1ns with this caching.
-pid_t GetCachedTID() {
-#ifdef ABSL_HAVE_THREAD_LOCAL
-  static thread_local pid_t thread_id = GetTID();
-  return thread_id;
-#else
-  return GetTID();
-#endif  // ABSL_HAVE_THREAD_LOCAL
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/sysinfo.h b/third_party/abseil/absl/base/internal/sysinfo.h
deleted file mode 100644
index 119cf1f..0000000
--- a/third_party/abseil/absl/base/internal/sysinfo.h
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file includes routines to find out characteristics
-// of the machine a program is running on.  It is undoubtedly
-// system-dependent.
-
-// Functions listed here that accept a pid_t as an argument act on the
-// current process if the pid_t argument is 0
-// All functions here are thread-hostile due to file caching unless
-// commented otherwise.
-
-#ifndef ABSL_BASE_INTERNAL_SYSINFO_H_
-#define ABSL_BASE_INTERNAL_SYSINFO_H_
-
-#ifndef _WIN32
-#include <sys/types.h>
-#endif
-
-#include <cstdint>
-
-#include "absl/base/config.h"
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// Nominal core processor cycles per second of each processor.   This is _not_
-// necessarily the frequency of the CycleClock counter (see cycleclock.h)
-// Thread-safe.
-double NominalCPUFrequency();
-
-// Number of logical processors (hyperthreads) in system. Thread-safe.
-int NumCPUs();
-
-// Return the thread id of the current thread, as told by the system.
-// No two currently-live threads implemented by the OS shall have the same ID.
-// Thread ids of exited threads may be reused.   Multiple user-level threads
-// may have the same thread ID if multiplexed on the same OS thread.
-//
-// On Linux, you may send a signal to the resulting ID with kill().  However,
-// it is recommended for portability that you use pthread_kill() instead.
-#ifdef _WIN32
-// On Windows, process id and thread id are of the same type according to the
-// return types of GetProcessId() and GetThreadId() are both DWORD, an unsigned
-// 32-bit type.
-using pid_t = uint32_t;
-#endif
-pid_t GetTID();
-
-// Like GetTID(), but caches the result in thread-local storage in order
-// to avoid unnecessary system calls. Note that there are some cases where
-// one must call through to GetTID directly, which is why this exists as a
-// separate function. For example, GetCachedTID() is not safe to call in
-// an asynchronous signal-handling context nor right after a call to fork().
-pid_t GetCachedTID();
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_SYSINFO_H_
diff --git a/third_party/abseil/absl/base/internal/sysinfo_test.cc b/third_party/abseil/absl/base/internal/sysinfo_test.cc
deleted file mode 100644
index 5f9e45f..0000000
--- a/third_party/abseil/absl/base/internal/sysinfo_test.cc
+++ /dev/null
@@ -1,111 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/sysinfo.h"
-
-#ifndef _WIN32
-#include <sys/types.h>
-#include <unistd.h>
-#endif
-
-#include <thread>  // NOLINT(build/c++11)
-#include <unordered_set>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/synchronization/barrier.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-TEST(SysinfoTest, NumCPUs) {
-  EXPECT_NE(NumCPUs(), 0)
-      << "NumCPUs() should not have the default value of 0";
-}
-
-// Ensure that NominalCPUFrequency returns a reasonable value, or 1.00 on
-// platforms where the CPU frequency is not available through sysfs.
-//
-// POWER is particularly problematic here; some Linux kernels expose the CPU
-// frequency, while others do not. Since we can't predict a priori what a given
-// machine is going to do, just disable this test on POWER on Linux.
-#if !(defined(__linux) && (defined(__ppc64__) || defined(__PPC64__)))
-TEST(SysinfoTest, NominalCPUFrequency) {
-  // Linux only exposes the CPU frequency on certain architectures, and
-  // Emscripten doesn't expose it at all.
-#if defined(__linux__) &&                                                  \
-        (defined(__aarch64__) || defined(__hppa__) || defined(__mips__) || \
-         defined(__riscv) || defined(__s390x__)) ||                        \
-    defined(__EMSCRIPTEN__)
-  EXPECT_EQ(NominalCPUFrequency(), 1.0)
-      << "CPU frequency detection was fixed! Please update unittest.";
-#else
-  EXPECT_GE(NominalCPUFrequency(), 1000.0)
-      << "NominalCPUFrequency() did not return a reasonable value";
-#endif
-}
-#endif
-
-TEST(SysinfoTest, GetTID) {
-  EXPECT_EQ(GetTID(), GetTID());  // Basic compile and equality test.
-#ifdef __native_client__
-  // Native Client has a race condition bug that leads to memory
-  // exaustion when repeatedly creating and joining threads.
-  // https://bugs.chromium.org/p/nativeclient/issues/detail?id=1027
-  return;
-#endif
-  // Test that TIDs are unique to each thread.
-  // Uses a few loops to exercise implementations that reallocate IDs.
-  for (int i = 0; i < 10; ++i) {
-    constexpr int kNumThreads = 10;
-    Barrier all_threads_done(kNumThreads);
-    std::vector<std::thread> threads;
-
-    Mutex mutex;
-    std::unordered_set<pid_t> tids;
-
-    for (int j = 0; j < kNumThreads; ++j) {
-      threads.push_back(std::thread([&]() {
-        pid_t id = GetTID();
-        {
-          MutexLock lock(&mutex);
-          ASSERT_TRUE(tids.find(id) == tids.end());
-          tids.insert(id);
-        }
-        // We can't simply join the threads here. The threads need to
-        // be alive otherwise the TID might have been reallocated to
-        // another live thread.
-        all_threads_done.Block();
-      }));
-    }
-    for (auto& thread : threads) {
-      thread.join();
-    }
-  }
-}
-
-#ifdef __linux__
-TEST(SysinfoTest, LinuxGetTID) {
-  // On Linux, for the main thread, GetTID()==getpid() is guaranteed by the API.
-  EXPECT_EQ(GetTID(), getpid());
-}
-#endif
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/thread_annotations.h b/third_party/abseil/absl/base/internal/thread_annotations.h
deleted file mode 100644
index 4dab6a9..0000000
--- a/third_party/abseil/absl/base/internal/thread_annotations.h
+++ /dev/null
@@ -1,271 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: thread_annotations.h
-// -----------------------------------------------------------------------------
-//
-// WARNING: This is a backwards compatible header and it will be removed after
-// the migration to prefixed thread annotations is finished; please include
-// "absl/base/thread_annotations.h".
-//
-// This header file contains macro definitions for thread safety annotations
-// that allow developers to document the locking policies of multi-threaded
-// code. The annotations can also help program analysis tools to identify
-// potential thread safety issues.
-//
-// These annotations are implemented using compiler attributes. Using the macros
-// defined here instead of raw attributes allow for portability and future
-// compatibility.
-//
-// When referring to mutexes in the arguments of the attributes, you should
-// use variable names or more complex expressions (e.g. my_object->mutex_)
-// that evaluate to a concrete mutex object whenever possible. If the mutex
-// you want to refer to is not in scope, you may use a member pointer
-// (e.g. &MyClass::mutex_) to refer to a mutex in some (unknown) object.
-
-#ifndef ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_
-#define ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_
-
-#if defined(__clang__)
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)   __attribute__((x))
-#else
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)   // no-op
-#endif
-
-// GUARDED_BY()
-//
-// Documents if a shared field or global variable needs to be protected by a
-// mutex. GUARDED_BY() allows the user to specify a particular mutex that
-// should be held when accessing the annotated variable.
-//
-// Although this annotation (and PT_GUARDED_BY, below) cannot be applied to
-// local variables, a local variable and its associated mutex can often be
-// combined into a small class or struct, thereby allowing the annotation.
-//
-// Example:
-//
-//   class Foo {
-//     Mutex mu_;
-//     int p1_ GUARDED_BY(mu_);
-//     ...
-//   };
-#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
-
-// PT_GUARDED_BY()
-//
-// Documents if the memory location pointed to by a pointer should be guarded
-// by a mutex when dereferencing the pointer.
-//
-// Example:
-//   class Foo {
-//     Mutex mu_;
-//     int *p1_ PT_GUARDED_BY(mu_);
-//     ...
-//   };
-//
-// Note that a pointer variable to a shared memory location could itself be a
-// shared variable.
-//
-// Example:
-//
-//   // `q_`, guarded by `mu1_`, points to a shared memory location that is
-//   // guarded by `mu2_`:
-//   int *q_ GUARDED_BY(mu1_) PT_GUARDED_BY(mu2_);
-#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
-
-// ACQUIRED_AFTER() / ACQUIRED_BEFORE()
-//
-// Documents the acquisition order between locks that can be held
-// simultaneously by a thread. For any two locks that need to be annotated
-// to establish an acquisition order, only one of them needs the annotation.
-// (i.e. You don't have to annotate both locks with both ACQUIRED_AFTER
-// and ACQUIRED_BEFORE.)
-//
-// As with GUARDED_BY, this is only applicable to mutexes that are shared
-// fields or global variables.
-//
-// Example:
-//
-//   Mutex m1_;
-//   Mutex m2_ ACQUIRED_AFTER(m1_);
-#define ACQUIRED_AFTER(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
-
-#define ACQUIRED_BEFORE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
-
-// EXCLUSIVE_LOCKS_REQUIRED() / SHARED_LOCKS_REQUIRED()
-//
-// Documents a function that expects a mutex to be held prior to entry.
-// The mutex is expected to be held both on entry to, and exit from, the
-// function.
-//
-// An exclusive lock allows read-write access to the guarded data member(s), and
-// only one thread can acquire a lock exclusively at any one time. A shared lock
-// allows read-only access, and any number of threads can acquire a shared lock
-// concurrently.
-//
-// Generally, non-const methods should be annotated with
-// EXCLUSIVE_LOCKS_REQUIRED, while const methods should be annotated with
-// SHARED_LOCKS_REQUIRED.
-//
-// Example:
-//
-//   Mutex mu1, mu2;
-//   int a GUARDED_BY(mu1);
-//   int b GUARDED_BY(mu2);
-//
-//   void foo() EXCLUSIVE_LOCKS_REQUIRED(mu1, mu2) { ... }
-//   void bar() const SHARED_LOCKS_REQUIRED(mu1, mu2) { ... }
-#define EXCLUSIVE_LOCKS_REQUIRED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_locks_required(__VA_ARGS__))
-
-#define SHARED_LOCKS_REQUIRED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(shared_locks_required(__VA_ARGS__))
-
-// LOCKS_EXCLUDED()
-//
-// Documents the locks acquired in the body of the function. These locks
-// cannot be held when calling this function (as Abseil's `Mutex` locks are
-// non-reentrant).
-#define LOCKS_EXCLUDED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
-
-// LOCK_RETURNED()
-//
-// Documents a function that returns a mutex without acquiring it.  For example,
-// a public getter method that returns a pointer to a private mutex should
-// be annotated with LOCK_RETURNED.
-#define LOCK_RETURNED(x) \
-  THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
-
-// LOCKABLE
-//
-// Documents if a class/type is a lockable type (such as the `Mutex` class).
-#define LOCKABLE \
-  THREAD_ANNOTATION_ATTRIBUTE__(lockable)
-
-// SCOPED_LOCKABLE
-//
-// Documents if a class does RAII locking (such as the `MutexLock` class).
-// The constructor should use `LOCK_FUNCTION()` to specify the mutex that is
-// acquired, and the destructor should use `UNLOCK_FUNCTION()` with no
-// arguments; the analysis will assume that the destructor unlocks whatever the
-// constructor locked.
-#define SCOPED_LOCKABLE \
-  THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
-
-// EXCLUSIVE_LOCK_FUNCTION()
-//
-// Documents functions that acquire a lock in the body of a function, and do
-// not release it.
-#define EXCLUSIVE_LOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_lock_function(__VA_ARGS__))
-
-// SHARED_LOCK_FUNCTION()
-//
-// Documents functions that acquire a shared (reader) lock in the body of a
-// function, and do not release it.
-#define SHARED_LOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(shared_lock_function(__VA_ARGS__))
-
-// UNLOCK_FUNCTION()
-//
-// Documents functions that expect a lock to be held on entry to the function,
-// and release it in the body of the function.
-#define UNLOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(unlock_function(__VA_ARGS__))
-
-// EXCLUSIVE_TRYLOCK_FUNCTION() / SHARED_TRYLOCK_FUNCTION()
-//
-// Documents functions that try to acquire a lock, and return success or failure
-// (or a non-boolean value that can be interpreted as a boolean).
-// The first argument should be `true` for functions that return `true` on
-// success, or `false` for functions that return `false` on success. The second
-// argument specifies the mutex that is locked on success. If unspecified, this
-// mutex is assumed to be `this`.
-#define EXCLUSIVE_TRYLOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_trylock_function(__VA_ARGS__))
-
-#define SHARED_TRYLOCK_FUNCTION(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(shared_trylock_function(__VA_ARGS__))
-
-// ASSERT_EXCLUSIVE_LOCK() / ASSERT_SHARED_LOCK()
-//
-// Documents functions that dynamically check to see if a lock is held, and fail
-// if it is not held.
-#define ASSERT_EXCLUSIVE_LOCK(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(assert_exclusive_lock(__VA_ARGS__))
-
-#define ASSERT_SHARED_LOCK(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_lock(__VA_ARGS__))
-
-// NO_THREAD_SAFETY_ANALYSIS
-//
-// Turns off thread safety checking within the body of a particular function.
-// This annotation is used to mark functions that are known to be correct, but
-// the locking behavior is more complicated than the analyzer can handle.
-#define NO_THREAD_SAFETY_ANALYSIS \
-  THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
-
-//------------------------------------------------------------------------------
-// Tool-Supplied Annotations
-//------------------------------------------------------------------------------
-
-// TS_UNCHECKED should be placed around lock expressions that are not valid
-// C++ syntax, but which are present for documentation purposes.  These
-// annotations will be ignored by the analysis.
-#define TS_UNCHECKED(x) ""
-
-// TS_FIXME is used to mark lock expressions that are not valid C++ syntax.
-// It is used by automated tools to mark and disable invalid expressions.
-// The annotation should either be fixed, or changed to TS_UNCHECKED.
-#define TS_FIXME(x) ""
-
-// Like NO_THREAD_SAFETY_ANALYSIS, this turns off checking within the body of
-// a particular function.  However, this attribute is used to mark functions
-// that are incorrect and need to be fixed.  It is used by automated tools to
-// avoid breaking the build when the analysis is updated.
-// Code owners are expected to eventually fix the routine.
-#define NO_THREAD_SAFETY_ANALYSIS_FIXME  NO_THREAD_SAFETY_ANALYSIS
-
-// Similar to NO_THREAD_SAFETY_ANALYSIS_FIXME, this macro marks a GUARDED_BY
-// annotation that needs to be fixed, because it is producing thread safety
-// warning.  It disables the GUARDED_BY.
-#define GUARDED_BY_FIXME(x)
-
-// Disables warnings for a single read operation.  This can be used to avoid
-// warnings when it is known that the read is not actually involved in a race,
-// but the compiler cannot confirm that.
-#define TS_UNCHECKED_READ(x) thread_safety_analysis::ts_unchecked_read(x)
-
-
-namespace thread_safety_analysis {
-
-// Takes a reference to a guarded data member, and returns an unguarded
-// reference.
-template <typename T>
-inline const T& ts_unchecked_read(const T& v) NO_THREAD_SAFETY_ANALYSIS {
-  return v;
-}
-
-template <typename T>
-inline T& ts_unchecked_read(T& v) NO_THREAD_SAFETY_ANALYSIS {
-  return v;
-}
-
-}  // namespace thread_safety_analysis
-
-#endif  // ABSL_BASE_INTERNAL_THREAD_ANNOTATIONS_H_
diff --git a/third_party/abseil/absl/base/internal/thread_identity.cc b/third_party/abseil/absl/base/internal/thread_identity.cc
deleted file mode 100644
index 6ea010e..0000000
--- a/third_party/abseil/absl/base/internal/thread_identity.cc
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/thread_identity.h"
-
-#ifndef _WIN32
-#include <pthread.h>
-#include <signal.h>
-#endif
-
-#include <atomic>
-#include <cassert>
-#include <memory>
-
-#include "absl/base/attributes.h"
-#include "absl/base/call_once.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-#if ABSL_THREAD_IDENTITY_MODE != ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-namespace {
-// Used to co-ordinate one-time creation of our pthread_key
-absl::once_flag init_thread_identity_key_once;
-pthread_key_t thread_identity_pthread_key;
-std::atomic<bool> pthread_key_initialized(false);
-
-void AllocateThreadIdentityKey(ThreadIdentityReclaimerFunction reclaimer) {
-  pthread_key_create(&thread_identity_pthread_key, reclaimer);
-  pthread_key_initialized.store(true, std::memory_order_release);
-}
-}  // namespace
-#endif
-
-#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \
-    ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-// The actual TLS storage for a thread's currently associated ThreadIdentity.
-// This is referenced by inline accessors in the header.
-// "protected" visibility ensures that if multiple instances of Abseil code
-// exist within a process (via dlopen() or similar), references to
-// thread_identity_ptr from each instance of the code will refer to
-// *different* instances of this ptr.
-// Apple platforms have the visibility attribute, but issue a compile warning
-// that protected visibility is unsupported.
-#if ABSL_HAVE_ATTRIBUTE(visibility) && !defined(__APPLE__)
-__attribute__((visibility("protected")))
-#endif  // ABSL_HAVE_ATTRIBUTE(visibility) && !defined(__APPLE__)
-#if ABSL_PER_THREAD_TLS
-// Prefer __thread to thread_local as benchmarks indicate it is a bit faster.
-ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* thread_identity_ptr = nullptr;
-#elif defined(ABSL_HAVE_THREAD_LOCAL)
-thread_local ThreadIdentity* thread_identity_ptr = nullptr;
-#endif  // ABSL_PER_THREAD_TLS
-#endif  // TLS or CPP11
-
-void SetCurrentThreadIdentity(
-    ThreadIdentity* identity, ThreadIdentityReclaimerFunction reclaimer) {
-  assert(CurrentThreadIdentityIfPresent() == nullptr);
-  // Associate our destructor.
-  // NOTE: This call to pthread_setspecific is currently the only immovable
-  // barrier to CurrentThreadIdentity() always being async signal safe.
-#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC
-  // NOTE: Not async-safe.  But can be open-coded.
-  absl::call_once(init_thread_identity_key_once, AllocateThreadIdentityKey,
-                  reclaimer);
-
-#if defined(__EMSCRIPTEN__) || defined(__MINGW32__)
-  // Emscripten and MinGW pthread implementations does not support signals.
-  // See https://kripken.github.io/emscripten-site/docs/porting/pthreads.html
-  // for more information.
-  pthread_setspecific(thread_identity_pthread_key,
-                      reinterpret_cast<void*>(identity));
-#else
-  // We must mask signals around the call to setspecific as with current glibc,
-  // a concurrent getspecific (needed for GetCurrentThreadIdentityIfPresent())
-  // may zero our value.
-  //
-  // While not officially async-signal safe, getspecific within a signal handler
-  // is otherwise OK.
-  sigset_t all_signals;
-  sigset_t curr_signals;
-  sigfillset(&all_signals);
-  pthread_sigmask(SIG_SETMASK, &all_signals, &curr_signals);
-  pthread_setspecific(thread_identity_pthread_key,
-                      reinterpret_cast<void*>(identity));
-  pthread_sigmask(SIG_SETMASK, &curr_signals, nullptr);
-#endif  // !__EMSCRIPTEN__ && !__MINGW32__
-
-#elif ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS
-  // NOTE: Not async-safe.  But can be open-coded.
-  absl::call_once(init_thread_identity_key_once, AllocateThreadIdentityKey,
-                  reclaimer);
-  pthread_setspecific(thread_identity_pthread_key,
-                      reinterpret_cast<void*>(identity));
-  thread_identity_ptr = identity;
-#elif ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-  thread_local std::unique_ptr<ThreadIdentity, ThreadIdentityReclaimerFunction>
-      holder(identity, reclaimer);
-  thread_identity_ptr = identity;
-#else
-#error Unimplemented ABSL_THREAD_IDENTITY_MODE
-#endif
-}
-
-#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \
-    ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-
-// Please see the comment on `CurrentThreadIdentityIfPresent` in
-// thread_identity.h. Because DLLs cannot expose thread_local variables in
-// headers, we opt for the correct-but-slower option of placing the definition
-// of this function only in a translation unit inside DLL.
-#if defined(ABSL_BUILD_DLL) || defined(ABSL_CONSUME_DLL)
-ThreadIdentity* CurrentThreadIdentityIfPresent() { return thread_identity_ptr; }
-#endif
-#endif
-
-void ClearCurrentThreadIdentity() {
-#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \
-    ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-  thread_identity_ptr = nullptr;
-#elif ABSL_THREAD_IDENTITY_MODE == \
-      ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC
-  // pthread_setspecific expected to clear value on destruction
-  assert(CurrentThreadIdentityIfPresent() == nullptr);
-#endif
-}
-
-#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC
-ThreadIdentity* CurrentThreadIdentityIfPresent() {
-  bool initialized = pthread_key_initialized.load(std::memory_order_acquire);
-  if (!initialized) {
-    return nullptr;
-  }
-  return reinterpret_cast<ThreadIdentity*>(
-      pthread_getspecific(thread_identity_pthread_key));
-}
-#endif
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/thread_identity.h b/third_party/abseil/absl/base/internal/thread_identity.h
deleted file mode 100644
index d2a65fd..0000000
--- a/third_party/abseil/absl/base/internal/thread_identity.h
+++ /dev/null
@@ -1,260 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Each active thread has an ThreadIdentity that may represent the thread in
-// various level interfaces.  ThreadIdentity objects are never deallocated.
-// When a thread terminates, its ThreadIdentity object may be reused for a
-// thread created later.
-
-#ifndef ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_
-#define ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_
-
-#ifndef _WIN32
-#include <pthread.h>
-// Defines __GOOGLE_GRTE_VERSION__ (via glibc-specific features.h) when
-// supported.
-#include <unistd.h>
-#endif
-
-#include <atomic>
-#include <cstdint>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/per_thread_tls.h"
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-struct SynchLocksHeld;
-struct SynchWaitParams;
-
-namespace base_internal {
-
-class SpinLock;
-struct ThreadIdentity;
-
-// Used by the implementation of absl::Mutex and absl::CondVar.
-struct PerThreadSynch {
-  // The internal representation of absl::Mutex and absl::CondVar rely
-  // on the alignment of PerThreadSynch. Both store the address of the
-  // PerThreadSynch in the high-order bits of their internal state,
-  // which means the low kLowZeroBits of the address of PerThreadSynch
-  // must be zero.
-  static constexpr int kLowZeroBits = 8;
-  static constexpr int kAlignment = 1 << kLowZeroBits;
-
-  // Returns the associated ThreadIdentity.
-  // This can be implemented as a cast because we guarantee
-  // PerThreadSynch is the first element of ThreadIdentity.
-  ThreadIdentity* thread_identity() {
-    return reinterpret_cast<ThreadIdentity*>(this);
-  }
-
-  PerThreadSynch *next;  // Circular waiter queue; initialized to 0.
-  PerThreadSynch *skip;  // If non-zero, all entries in Mutex queue
-                         // up to and including "skip" have same
-                         // condition as this, and will be woken later
-  bool may_skip;         // if false while on mutex queue, a mutex unlocker
-                         // is using this PerThreadSynch as a terminator.  Its
-                         // skip field must not be filled in because the loop
-                         // might then skip over the terminator.
-  bool wake;             // This thread is to be woken from a Mutex.
-  // If "x" is on a waiter list for a mutex, "x->cond_waiter" is true iff the
-  // waiter is waiting on the mutex as part of a CV Wait or Mutex Await.
-  //
-  // The value of "x->cond_waiter" is meaningless if "x" is not on a
-  // Mutex waiter list.
-  bool cond_waiter;
-  bool maybe_unlocking;  // Valid at head of Mutex waiter queue;
-                         // true if UnlockSlow could be searching
-                         // for a waiter to wake.  Used for an optimization
-                         // in Enqueue().  true is always a valid value.
-                         // Can be reset to false when the unlocker or any
-                         // writer releases the lock, or a reader fully
-                         // releases the lock.  It may not be set to false
-                         // by a reader that decrements the count to
-                         // non-zero. protected by mutex spinlock
-  bool suppress_fatal_errors;  // If true, try to proceed even in the face
-                               // of broken invariants.  This is used within
-                               // fatal signal handlers to improve the
-                               // chances of debug logging information being
-                               // output successfully.
-  int priority;                // Priority of thread (updated every so often).
-
-  // State values:
-  //   kAvailable: This PerThreadSynch is available.
-  //   kQueued: This PerThreadSynch is unavailable, it's currently queued on a
-  //            Mutex or CondVar waistlist.
-  //
-  // Transitions from kQueued to kAvailable require a release
-  // barrier. This is needed as a waiter may use "state" to
-  // independently observe that it's no longer queued.
-  //
-  // Transitions from kAvailable to kQueued require no barrier, they
-  // are externally ordered by the Mutex.
-  enum State {
-    kAvailable,
-    kQueued
-  };
-  std::atomic<State> state;
-
-  // The wait parameters of the current wait.  waitp is null if the
-  // thread is not waiting. Transitions from null to non-null must
-  // occur before the enqueue commit point (state = kQueued in
-  // Enqueue() and CondVarEnqueue()). Transitions from non-null to
-  // null must occur after the wait is finished (state = kAvailable in
-  // Mutex::Block() and CondVar::WaitCommon()). This field may be
-  // changed only by the thread that describes this PerThreadSynch.  A
-  // special case is Fer(), which calls Enqueue() on another thread,
-  // but with an identical SynchWaitParams pointer, thus leaving the
-  // pointer unchanged.
-  SynchWaitParams* waitp;
-
-  intptr_t readers;     // Number of readers in mutex.
-
-  // When priority will next be read (cycles).
-  int64_t next_priority_read_cycles;
-
-  // Locks held; used during deadlock detection.
-  // Allocated in Synch_GetAllLocks() and freed in ReclaimThreadIdentity().
-  SynchLocksHeld *all_locks;
-};
-
-// The instances of this class are allocated in NewThreadIdentity() with an
-// alignment of PerThreadSynch::kAlignment.
-struct ThreadIdentity {
-  // Must be the first member.  The Mutex implementation requires that
-  // the PerThreadSynch object associated with each thread is
-  // PerThreadSynch::kAlignment aligned.  We provide this alignment on
-  // ThreadIdentity itself.
-  PerThreadSynch per_thread_synch;
-
-  // Private: Reserved for absl::synchronization_internal::Waiter.
-  struct WaiterState {
-    char data[128];
-  } waiter_state;
-
-  // Used by PerThreadSem::{Get,Set}ThreadBlockedCounter().
-  std::atomic<int>* blocked_count_ptr;
-
-  // The following variables are mostly read/written just by the
-  // thread itself.  The only exception is that these are read by
-  // a ticker thread as a hint.
-  std::atomic<int> ticker;      // Tick counter, incremented once per second.
-  std::atomic<int> wait_start;  // Ticker value when thread started waiting.
-  std::atomic<bool> is_idle;    // Has thread become idle yet?
-
-  ThreadIdentity* next;
-};
-
-// Returns the ThreadIdentity object representing the calling thread; guaranteed
-// to be unique for its lifetime.  The returned object will remain valid for the
-// program's lifetime; although it may be re-assigned to a subsequent thread.
-// If one does not exist, return nullptr instead.
-//
-// Does not malloc(*), and is async-signal safe.
-// [*] Technically pthread_setspecific() does malloc on first use; however this
-// is handled internally within tcmalloc's initialization already.
-//
-// New ThreadIdentity objects can be constructed and associated with a thread
-// by calling GetOrCreateCurrentThreadIdentity() in per-thread-sem.h.
-ThreadIdentity* CurrentThreadIdentityIfPresent();
-
-using ThreadIdentityReclaimerFunction = void (*)(void*);
-
-// Sets the current thread identity to the given value.  'reclaimer' is a
-// pointer to the global function for cleaning up instances on thread
-// destruction.
-void SetCurrentThreadIdentity(ThreadIdentity* identity,
-                              ThreadIdentityReclaimerFunction reclaimer);
-
-// Removes the currently associated ThreadIdentity from the running thread.
-// This must be called from inside the ThreadIdentityReclaimerFunction, and only
-// from that function.
-void ClearCurrentThreadIdentity();
-
-// May be chosen at compile time via: -DABSL_FORCE_THREAD_IDENTITY_MODE=<mode
-// index>
-#ifdef ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC
-#error ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC cannot be direcly set
-#else
-#define ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC 0
-#endif
-
-#ifdef ABSL_THREAD_IDENTITY_MODE_USE_TLS
-#error ABSL_THREAD_IDENTITY_MODE_USE_TLS cannot be direcly set
-#else
-#define ABSL_THREAD_IDENTITY_MODE_USE_TLS 1
-#endif
-
-#ifdef ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-#error ABSL_THREAD_IDENTITY_MODE_USE_CPP11 cannot be direcly set
-#else
-#define ABSL_THREAD_IDENTITY_MODE_USE_CPP11 2
-#endif
-
-#ifdef ABSL_THREAD_IDENTITY_MODE
-#error ABSL_THREAD_IDENTITY_MODE cannot be direcly set
-#elif defined(ABSL_FORCE_THREAD_IDENTITY_MODE)
-#define ABSL_THREAD_IDENTITY_MODE ABSL_FORCE_THREAD_IDENTITY_MODE
-#elif defined(_WIN32) && !defined(__MINGW32__)
-#define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-#elif defined(__APPLE__) && defined(ABSL_HAVE_THREAD_LOCAL)
-#define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-#elif ABSL_PER_THREAD_TLS && defined(__GOOGLE_GRTE_VERSION__) &&        \
-    (__GOOGLE_GRTE_VERSION__ >= 20140228L)
-// Support for async-safe TLS was specifically added in GRTEv4.  It's not
-// present in the upstream eglibc.
-// Note:  Current default for production systems.
-#define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_TLS
-#else
-#define ABSL_THREAD_IDENTITY_MODE \
-  ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC
-#endif
-
-#if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \
-    ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11
-
-#if ABSL_PER_THREAD_TLS
-ABSL_CONST_INIT extern ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity*
-    thread_identity_ptr;
-#elif defined(ABSL_HAVE_THREAD_LOCAL)
-ABSL_CONST_INIT extern thread_local ThreadIdentity* thread_identity_ptr;
-#else
-#error Thread-local storage not detected on this platform
-#endif
-
-// thread_local variables cannot be in headers exposed by DLLs. However, it is
-// important for performance reasons in general that
-// `CurrentThreadIdentityIfPresent` be inlined. This is not possible across a
-// DLL boundary so, with DLLs, we opt to have the function not be inlined. Note
-// that `CurrentThreadIdentityIfPresent` is declared above so we can exclude
-// this entire inline definition when compiling as a DLL.
-#if !defined(ABSL_BUILD_DLL) && !defined(ABSL_CONSUME_DLL)
-inline ThreadIdentity* CurrentThreadIdentityIfPresent() {
-  return thread_identity_ptr;
-}
-#endif
-
-#elif ABSL_THREAD_IDENTITY_MODE != \
-    ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC
-#error Unknown ABSL_THREAD_IDENTITY_MODE
-#endif
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_
diff --git a/third_party/abseil/absl/base/internal/thread_identity_benchmark.cc b/third_party/abseil/absl/base/internal/thread_identity_benchmark.cc
deleted file mode 100644
index 0ae10f2..0000000
--- a/third_party/abseil/absl/base/internal/thread_identity_benchmark.cc
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/synchronization/internal/create_thread_identity.h"
-#include "absl/synchronization/internal/per_thread_sem.h"
-
-namespace {
-
-void BM_SafeCurrentThreadIdentity(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::synchronization_internal::GetOrCreateCurrentThreadIdentity());
-  }
-}
-BENCHMARK(BM_SafeCurrentThreadIdentity);
-
-void BM_UnsafeCurrentThreadIdentity(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::base_internal::CurrentThreadIdentityIfPresent());
-  }
-}
-BENCHMARK(BM_UnsafeCurrentThreadIdentity);
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/thread_identity_test.cc b/third_party/abseil/absl/base/internal/thread_identity_test.cc
deleted file mode 100644
index 46a6f74..0000000
--- a/third_party/abseil/absl/base/internal/thread_identity_test.cc
+++ /dev/null
@@ -1,129 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/thread_identity.h"
-
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/macros.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/internal/per_thread_sem.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-ABSL_CONST_INIT static absl::base_internal::SpinLock map_lock(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-ABSL_CONST_INIT static int num_identities_reused ABSL_GUARDED_BY(map_lock);
-
-static const void* const kCheckNoIdentity = reinterpret_cast<void*>(1);
-
-static void TestThreadIdentityCurrent(const void* assert_no_identity) {
-  ThreadIdentity* identity;
-
-  // We have to test this conditionally, because if the test framework relies
-  // on Abseil, then some previous action may have already allocated an
-  // identity.
-  if (assert_no_identity == kCheckNoIdentity) {
-    identity = CurrentThreadIdentityIfPresent();
-    EXPECT_TRUE(identity == nullptr);
-  }
-
-  identity = synchronization_internal::GetOrCreateCurrentThreadIdentity();
-  EXPECT_TRUE(identity != nullptr);
-  ThreadIdentity* identity_no_init;
-  identity_no_init = CurrentThreadIdentityIfPresent();
-  EXPECT_TRUE(identity == identity_no_init);
-
-  // Check that per_thread_synch is correctly aligned.
-  EXPECT_EQ(0, reinterpret_cast<intptr_t>(&identity->per_thread_synch) %
-                   PerThreadSynch::kAlignment);
-  EXPECT_EQ(identity, identity->per_thread_synch.thread_identity());
-
-  absl::base_internal::SpinLockHolder l(&map_lock);
-  num_identities_reused++;
-}
-
-TEST(ThreadIdentityTest, BasicIdentityWorks) {
-  // This tests for the main() thread.
-  TestThreadIdentityCurrent(nullptr);
-}
-
-TEST(ThreadIdentityTest, BasicIdentityWorksThreaded) {
-  // Now try the same basic test with multiple threads being created and
-  // destroyed.  This makes sure that:
-  // - New threads are created without a ThreadIdentity.
-  // - We re-allocate ThreadIdentity objects from the free-list.
-  // - If a thread implementation chooses to recycle threads, that
-  //   correct re-initialization occurs.
-  static const int kNumLoops = 3;
-  static const int kNumThreads = 32;
-  for (int iter = 0; iter < kNumLoops; iter++) {
-    std::vector<std::thread> threads;
-    for (int i = 0; i < kNumThreads; ++i) {
-      threads.push_back(
-          std::thread(TestThreadIdentityCurrent, kCheckNoIdentity));
-    }
-    for (auto& thread : threads) {
-      thread.join();
-    }
-  }
-
-  // We should have recycled ThreadIdentity objects above; while (external)
-  // library threads allocating their own identities may preclude some
-  // reuse, we should have sufficient repetitions to exclude this.
-  absl::base_internal::SpinLockHolder l(&map_lock);
-  EXPECT_LT(kNumThreads, num_identities_reused);
-}
-
-TEST(ThreadIdentityTest, ReusedThreadIdentityMutexTest) {
-  // This test repeatly creates and joins a series of threads, each of
-  // which acquires and releases shared Mutex locks. This verifies
-  // Mutex operations work correctly under a reused
-  // ThreadIdentity. Note that the most likely failure mode of this
-  // test is a crash or deadlock.
-  static const int kNumLoops = 10;
-  static const int kNumThreads = 12;
-  static const int kNumMutexes = 3;
-  static const int kNumLockLoops = 5;
-
-  Mutex mutexes[kNumMutexes];
-  for (int iter = 0; iter < kNumLoops; ++iter) {
-    std::vector<std::thread> threads;
-    for (int thread = 0; thread < kNumThreads; ++thread) {
-      threads.push_back(std::thread([&]() {
-        for (int l = 0; l < kNumLockLoops; ++l) {
-          for (int m = 0; m < kNumMutexes; ++m) {
-            MutexLock lock(&mutexes[m]);
-          }
-        }
-      }));
-    }
-    for (auto& thread : threads) {
-      thread.join();
-    }
-  }
-}
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/throw_delegate.cc b/third_party/abseil/absl/base/internal/throw_delegate.cc
deleted file mode 100644
index c260ff1..0000000
--- a/third_party/abseil/absl/base/internal/throw_delegate.cc
+++ /dev/null
@@ -1,212 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/throw_delegate.h"
-
-#include <cstdlib>
-#include <functional>
-#include <new>
-#include <stdexcept>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// NOTE: The various STL exception throwing functions are placed within the
-// #ifdef blocks so the symbols aren't exposed on platforms that don't support
-// them, such as the Android NDK. For example, ANGLE fails to link when building
-// within AOSP without them, since the STL functions don't exist.
-namespace {
-#ifdef ABSL_HAVE_EXCEPTIONS
-template <typename T>
-[[noreturn]] void Throw(const T& error) {
-  throw error;
-}
-#endif
-}  // namespace
-
-void ThrowStdLogicError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::logic_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdLogicError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::logic_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-void ThrowStdInvalidArgument(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::invalid_argument(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdInvalidArgument(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::invalid_argument(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdDomainError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::domain_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdDomainError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::domain_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdLengthError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::length_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdLengthError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::length_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdOutOfRange(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::out_of_range(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdOutOfRange(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::out_of_range(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdRuntimeError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::runtime_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdRuntimeError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::runtime_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdRangeError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::range_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdRangeError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::range_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdOverflowError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::overflow_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdOverflowError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::overflow_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdUnderflowError(const std::string& what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::underflow_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg.c_str());
-  std::abort();
-#endif
-}
-void ThrowStdUnderflowError(const char* what_arg) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::underflow_error(what_arg));
-#else
-  ABSL_RAW_LOG(FATAL, "%s", what_arg);
-  std::abort();
-#endif
-}
-
-void ThrowStdBadFunctionCall() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::bad_function_call());
-#else
-  std::abort();
-#endif
-}
-
-void ThrowStdBadAlloc() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  Throw(std::bad_alloc());
-#else
-  std::abort();
-#endif
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/internal/throw_delegate.h b/third_party/abseil/absl/base/internal/throw_delegate.h
deleted file mode 100644
index 075f527..0000000
--- a/third_party/abseil/absl/base/internal/throw_delegate.h
+++ /dev/null
@@ -1,75 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_THROW_DELEGATE_H_
-#define ABSL_BASE_INTERNAL_THROW_DELEGATE_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// Helper functions that allow throwing exceptions consistently from anywhere.
-// The main use case is for header-based libraries (eg templates), as they will
-// be built by many different targets with their own compiler options.
-// In particular, this will allow a safe way to throw exceptions even if the
-// caller is compiled with -fno-exceptions.  This is intended for implementing
-// things like map<>::at(), which the standard documents as throwing an
-// exception on error.
-//
-// Using other techniques like #if tricks could lead to ODR violations.
-//
-// You shouldn't use it unless you're writing code that you know will be built
-// both with and without exceptions and you need to conform to an interface
-// that uses exceptions.
-
-[[noreturn]] void ThrowStdLogicError(const std::string& what_arg);
-[[noreturn]] void ThrowStdLogicError(const char* what_arg);
-[[noreturn]] void ThrowStdInvalidArgument(const std::string& what_arg);
-[[noreturn]] void ThrowStdInvalidArgument(const char* what_arg);
-[[noreturn]] void ThrowStdDomainError(const std::string& what_arg);
-[[noreturn]] void ThrowStdDomainError(const char* what_arg);
-[[noreturn]] void ThrowStdLengthError(const std::string& what_arg);
-[[noreturn]] void ThrowStdLengthError(const char* what_arg);
-[[noreturn]] void ThrowStdOutOfRange(const std::string& what_arg);
-[[noreturn]] void ThrowStdOutOfRange(const char* what_arg);
-[[noreturn]] void ThrowStdRuntimeError(const std::string& what_arg);
-[[noreturn]] void ThrowStdRuntimeError(const char* what_arg);
-[[noreturn]] void ThrowStdRangeError(const std::string& what_arg);
-[[noreturn]] void ThrowStdRangeError(const char* what_arg);
-[[noreturn]] void ThrowStdOverflowError(const std::string& what_arg);
-[[noreturn]] void ThrowStdOverflowError(const char* what_arg);
-[[noreturn]] void ThrowStdUnderflowError(const std::string& what_arg);
-[[noreturn]] void ThrowStdUnderflowError(const char* what_arg);
-
-[[noreturn]] void ThrowStdBadFunctionCall();
-[[noreturn]] void ThrowStdBadAlloc();
-
-// ThrowStdBadArrayNewLength() cannot be consistently supported because
-// std::bad_array_new_length is missing in libstdc++ until 4.9.0.
-// https://gcc.gnu.org/onlinedocs/gcc-4.8.3/libstdc++/api/a01379_source.html
-// https://gcc.gnu.org/onlinedocs/gcc-4.9.0/libstdc++/api/a01327_source.html
-// libcxx (as of 3.2) and msvc (as of 2015) both have it.
-// [[noreturn]] void ThrowStdBadArrayNewLength();
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_INTERNAL_THROW_DELEGATE_H_
diff --git a/third_party/abseil/absl/base/internal/tsan_mutex_interface.h b/third_party/abseil/absl/base/internal/tsan_mutex_interface.h
deleted file mode 100644
index 39207d8..0000000
--- a/third_party/abseil/absl/base/internal/tsan_mutex_interface.h
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file is intended solely for spinlock.h.
-// It provides ThreadSanitizer annotations for custom mutexes.
-// See <sanitizer/tsan_interface.h> for meaning of these annotations.
-
-#ifndef ABSL_BASE_INTERNAL_TSAN_MUTEX_INTERFACE_H_
-#define ABSL_BASE_INTERNAL_TSAN_MUTEX_INTERFACE_H_
-
-#include "absl/base/config.h"
-
-// ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-// Macro intended only for internal use.
-//
-// Checks whether LLVM Thread Sanitizer interfaces are available.
-// First made available in LLVM 5.0 (Sep 2017).
-#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-#error "ABSL_INTERNAL_HAVE_TSAN_INTERFACE cannot be directly set."
-#endif
-
-#if defined(ABSL_HAVE_THREAD_SANITIZER) && defined(__has_include)
-#if __has_include(<sanitizer/tsan_interface.h>)
-#define ABSL_INTERNAL_HAVE_TSAN_INTERFACE 1
-#endif
-#endif
-
-#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-#include <sanitizer/tsan_interface.h>
-
-#define ABSL_TSAN_MUTEX_CREATE __tsan_mutex_create
-#define ABSL_TSAN_MUTEX_DESTROY __tsan_mutex_destroy
-#define ABSL_TSAN_MUTEX_PRE_LOCK __tsan_mutex_pre_lock
-#define ABSL_TSAN_MUTEX_POST_LOCK __tsan_mutex_post_lock
-#define ABSL_TSAN_MUTEX_PRE_UNLOCK __tsan_mutex_pre_unlock
-#define ABSL_TSAN_MUTEX_POST_UNLOCK __tsan_mutex_post_unlock
-#define ABSL_TSAN_MUTEX_PRE_SIGNAL __tsan_mutex_pre_signal
-#define ABSL_TSAN_MUTEX_POST_SIGNAL __tsan_mutex_post_signal
-#define ABSL_TSAN_MUTEX_PRE_DIVERT __tsan_mutex_pre_divert
-#define ABSL_TSAN_MUTEX_POST_DIVERT __tsan_mutex_post_divert
-
-#else
-
-#define ABSL_TSAN_MUTEX_CREATE(...)
-#define ABSL_TSAN_MUTEX_DESTROY(...)
-#define ABSL_TSAN_MUTEX_PRE_LOCK(...)
-#define ABSL_TSAN_MUTEX_POST_LOCK(...)
-#define ABSL_TSAN_MUTEX_PRE_UNLOCK(...)
-#define ABSL_TSAN_MUTEX_POST_UNLOCK(...)
-#define ABSL_TSAN_MUTEX_PRE_SIGNAL(...)
-#define ABSL_TSAN_MUTEX_POST_SIGNAL(...)
-#define ABSL_TSAN_MUTEX_PRE_DIVERT(...)
-#define ABSL_TSAN_MUTEX_POST_DIVERT(...)
-
-#endif
-
-#endif  // ABSL_BASE_INTERNAL_TSAN_MUTEX_INTERFACE_H_
diff --git a/third_party/abseil/absl/base/internal/unaligned_access.h b/third_party/abseil/absl/base/internal/unaligned_access.h
deleted file mode 100644
index 093dd9b..0000000
--- a/third_party/abseil/absl/base/internal/unaligned_access.h
+++ /dev/null
@@ -1,82 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_
-#define ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_
-
-#include <string.h>
-
-#include <cstdint>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-
-// unaligned APIs
-
-// Portable handling of unaligned loads, stores, and copies.
-
-// The unaligned API is C++ only.  The declarations use C++ features
-// (namespaces, inline) which are absent or incompatible in C.
-#if defined(__cplusplus)
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-inline uint16_t UnalignedLoad16(const void *p) {
-  uint16_t t;
-  memcpy(&t, p, sizeof t);
-  return t;
-}
-
-inline uint32_t UnalignedLoad32(const void *p) {
-  uint32_t t;
-  memcpy(&t, p, sizeof t);
-  return t;
-}
-
-inline uint64_t UnalignedLoad64(const void *p) {
-  uint64_t t;
-  memcpy(&t, p, sizeof t);
-  return t;
-}
-
-inline void UnalignedStore16(void *p, uint16_t v) { memcpy(p, &v, sizeof v); }
-
-inline void UnalignedStore32(void *p, uint32_t v) { memcpy(p, &v, sizeof v); }
-
-inline void UnalignedStore64(void *p, uint64_t v) { memcpy(p, &v, sizeof v); }
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#define ABSL_INTERNAL_UNALIGNED_LOAD16(_p) \
-  (absl::base_internal::UnalignedLoad16(_p))
-#define ABSL_INTERNAL_UNALIGNED_LOAD32(_p) \
-  (absl::base_internal::UnalignedLoad32(_p))
-#define ABSL_INTERNAL_UNALIGNED_LOAD64(_p) \
-  (absl::base_internal::UnalignedLoad64(_p))
-
-#define ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \
-  (absl::base_internal::UnalignedStore16(_p, _val))
-#define ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \
-  (absl::base_internal::UnalignedStore32(_p, _val))
-#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \
-  (absl::base_internal::UnalignedStore64(_p, _val))
-
-#endif  // defined(__cplusplus), end of unaligned API
-
-#endif  // ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_
diff --git a/third_party/abseil/absl/base/internal/unique_small_name_test.cc b/third_party/abseil/absl/base/internal/unique_small_name_test.cc
deleted file mode 100644
index ff8c2b3..0000000
--- a/third_party/abseil/absl/base/internal/unique_small_name_test.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "gtest/gtest.h"
-#include "absl/base/optimization.h"
-#include "absl/strings/string_view.h"
-
-// This test by itself does not do anything fancy, but it serves as binary I can
-// query in shell test.
-
-namespace {
-
-template <class T>
-void DoNotOptimize(const T& var) {
-#ifdef __GNUC__
-  asm volatile("" : "+m"(const_cast<T&>(var)));
-#else
-  std::cout << (void*)&var;
-#endif
-}
-
-int very_long_int_variable_name ABSL_INTERNAL_UNIQUE_SMALL_NAME() = 0;
-char very_long_str_variable_name[] ABSL_INTERNAL_UNIQUE_SMALL_NAME() = "abc";
-
-TEST(UniqueSmallName, NonAutomaticVar) {
-  EXPECT_EQ(very_long_int_variable_name, 0);
-  EXPECT_EQ(absl::string_view(very_long_str_variable_name), "abc");
-}
-
-int VeryLongFreeFunctionName() ABSL_INTERNAL_UNIQUE_SMALL_NAME();
-
-TEST(UniqueSmallName, FreeFunction) {
-  DoNotOptimize(&VeryLongFreeFunctionName);
-
-  EXPECT_EQ(VeryLongFreeFunctionName(), 456);
-}
-
-int VeryLongFreeFunctionName() { return 456; }
-
-struct VeryLongStructName {
-  explicit VeryLongStructName(int i);
-
-  int VeryLongMethodName() ABSL_INTERNAL_UNIQUE_SMALL_NAME();
-
-  static int VeryLongStaticMethodName() ABSL_INTERNAL_UNIQUE_SMALL_NAME();
-
- private:
-  int fld;
-};
-
-TEST(UniqueSmallName, Struct) {
-  VeryLongStructName var(10);
-
-  DoNotOptimize(var);
-  DoNotOptimize(&VeryLongStructName::VeryLongMethodName);
-  DoNotOptimize(&VeryLongStructName::VeryLongStaticMethodName);
-
-  EXPECT_EQ(var.VeryLongMethodName(), 10);
-  EXPECT_EQ(VeryLongStructName::VeryLongStaticMethodName(), 123);
-}
-
-VeryLongStructName::VeryLongStructName(int i) : fld(i) {}
-int VeryLongStructName::VeryLongMethodName() { return fld; }
-int VeryLongStructName::VeryLongStaticMethodName() { return 123; }
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/internal/unscaledcycleclock.cc b/third_party/abseil/absl/base/internal/unscaledcycleclock.cc
deleted file mode 100644
index 1545288..0000000
--- a/third_party/abseil/absl/base/internal/unscaledcycleclock.cc
+++ /dev/null
@@ -1,138 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/unscaledcycleclock.h"
-
-#if ABSL_USE_UNSCALED_CYCLECLOCK
-
-#if defined(_WIN32)
-#include <intrin.h>
-#endif
-
-#if defined(__powerpc__) || defined(__ppc__)
-#ifdef __GLIBC__
-#include <sys/platform/ppc.h>
-#elif defined(__FreeBSD__)
-#include <sys/sysctl.h>
-#include <sys/types.h>
-#endif
-#endif
-
-#include "absl/base/internal/sysinfo.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-#if defined(__i386__)
-
-int64_t UnscaledCycleClock::Now() {
-  int64_t ret;
-  __asm__ volatile("rdtsc" : "=A"(ret));
-  return ret;
-}
-
-double UnscaledCycleClock::Frequency() {
-  return base_internal::NominalCPUFrequency();
-}
-
-#elif defined(__x86_64__)
-
-int64_t UnscaledCycleClock::Now() {
-  uint64_t low, high;
-  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
-  return (high << 32) | low;
-}
-
-double UnscaledCycleClock::Frequency() {
-  return base_internal::NominalCPUFrequency();
-}
-
-#elif defined(__powerpc__) || defined(__ppc__)
-
-int64_t UnscaledCycleClock::Now() {
-#ifdef __GLIBC__
-  return __ppc_get_timebase();
-#else
-#ifdef __powerpc64__
-  int64_t tbr;
-  asm volatile("mfspr %0, 268" : "=r"(tbr));
-  return tbr;
-#else
-  int32_t tbu, tbl, tmp;
-  asm volatile(
-      "0:\n"
-      "mftbu %[hi32]\n"
-      "mftb %[lo32]\n"
-      "mftbu %[tmp]\n"
-      "cmpw %[tmp],%[hi32]\n"
-      "bne 0b\n"
-      : [ hi32 ] "=r"(tbu), [ lo32 ] "=r"(tbl), [ tmp ] "=r"(tmp));
-  return (static_cast<int64_t>(tbu) << 32) | tbl;
-#endif
-#endif
-}
-
-double UnscaledCycleClock::Frequency() {
-#ifdef __GLIBC__
-  return __ppc_get_timebase_freq();
-#elif defined(__FreeBSD__)
-  static once_flag init_timebase_frequency_once;
-  static double timebase_frequency = 0.0;
-  base_internal::LowLevelCallOnce(&init_timebase_frequency_once, [&]() {
-    size_t length = sizeof(timebase_frequency);
-    sysctlbyname("kern.timecounter.tc.timebase.frequency", &timebase_frequency,
-                 &length, nullptr, 0);
-  });
-  return timebase_frequency;
-#else
-#error Must implement UnscaledCycleClock::Frequency()
-#endif
-}
-
-#elif defined(__aarch64__)
-
-// System timer of ARMv8 runs at a different frequency than the CPU's.
-// The frequency is fixed, typically in the range 1-50MHz.  It can be
-// read at CNTFRQ special register.  We assume the OS has set up
-// the virtual timer properly.
-int64_t UnscaledCycleClock::Now() {
-  int64_t virtual_timer_value;
-  asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
-  return virtual_timer_value;
-}
-
-double UnscaledCycleClock::Frequency() {
-  uint64_t aarch64_timer_frequency;
-  asm volatile("mrs %0, cntfrq_el0" : "=r"(aarch64_timer_frequency));
-  return aarch64_timer_frequency;
-}
-
-#elif defined(_M_IX86) || defined(_M_X64)
-
-#pragma intrinsic(__rdtsc)
-
-int64_t UnscaledCycleClock::Now() { return __rdtsc(); }
-
-double UnscaledCycleClock::Frequency() {
-  return base_internal::NominalCPUFrequency();
-}
-
-#endif
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USE_UNSCALED_CYCLECLOCK
diff --git a/third_party/abseil/absl/base/internal/unscaledcycleclock.h b/third_party/abseil/absl/base/internal/unscaledcycleclock.h
deleted file mode 100644
index 82f2c87..0000000
--- a/third_party/abseil/absl/base/internal/unscaledcycleclock.h
+++ /dev/null
@@ -1,124 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// UnscaledCycleClock
-//    An UnscaledCycleClock yields the value and frequency of a cycle counter
-//    that increments at a rate that is approximately constant.
-//    This class is for internal use only, you should consider using CycleClock
-//    instead.
-//
-// Notes:
-// The cycle counter frequency is not necessarily the core clock frequency.
-// That is, CycleCounter cycles are not necessarily "CPU cycles".
-//
-// An arbitrary offset may have been added to the counter at power on.
-//
-// On some platforms, the rate and offset of the counter may differ
-// slightly when read from different CPUs of a multiprocessor.  Usually,
-// we try to ensure that the operating system adjusts values periodically
-// so that values agree approximately.   If you need stronger guarantees,
-// consider using alternate interfaces.
-//
-// The CPU is not required to maintain the ordering of a cycle counter read
-// with respect to surrounding instructions.
-
-#ifndef ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_H_
-#define ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_H_
-
-#include <cstdint>
-
-#if defined(__APPLE__)
-#include <TargetConditionals.h>
-#endif
-
-#include "absl/base/port.h"
-
-// The following platforms have an implementation of a hardware counter.
-#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \
-  defined(__powerpc__) || defined(__ppc__) || \
-  defined(_M_IX86) || defined(_M_X64)
-#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1
-#else
-#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 0
-#endif
-
-// The following platforms often disable access to the hardware
-// counter (through a sandbox) even if the underlying hardware has a
-// usable counter. The CycleTimer interface also requires a *scaled*
-// CycleClock that runs at atleast 1 MHz. We've found some Android
-// ARM64 devices where this is not the case, so we disable it by
-// default on Android ARM64.
-#if defined(__native_client__) ||                      \
-    (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) || \
-    (defined(__ANDROID__) && defined(__aarch64__))
-#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 0
-#else
-#define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 1
-#endif
-
-// UnscaledCycleClock is an optional internal feature.
-// Use "#if ABSL_USE_UNSCALED_CYCLECLOCK" to test for its presence.
-// Can be overridden at compile-time via -DABSL_USE_UNSCALED_CYCLECLOCK=0|1
-#if !defined(ABSL_USE_UNSCALED_CYCLECLOCK)
-#define ABSL_USE_UNSCALED_CYCLECLOCK               \
-  (ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION && \
-   ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT)
-#endif
-
-#if ABSL_USE_UNSCALED_CYCLECLOCK
-
-// This macro can be used to test if UnscaledCycleClock::Frequency()
-// is NominalCPUFrequency() on a particular platform.
-#if  (defined(__i386__) || defined(__x86_64__) || \
-      defined(_M_IX86) || defined(_M_X64))
-#define ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-class UnscaledCycleClockWrapperForGetCurrentTime;
-}  // namespace time_internal
-
-namespace base_internal {
-class CycleClock;
-class UnscaledCycleClockWrapperForInitializeFrequency;
-
-class UnscaledCycleClock {
- private:
-  UnscaledCycleClock() = delete;
-
-  // Return the value of a cycle counter that counts at a rate that is
-  // approximately constant.
-  static int64_t Now();
-
-  // Return the how much UnscaledCycleClock::Now() increases per second.
-  // This is not necessarily the core CPU clock frequency.
-  // It may be the nominal value report by the kernel, rather than a measured
-  // value.
-  static double Frequency();
-
-  // Allowed users
-  friend class base_internal::CycleClock;
-  friend class time_internal::UnscaledCycleClockWrapperForGetCurrentTime;
-  friend class base_internal::UnscaledCycleClockWrapperForInitializeFrequency;
-};
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USE_UNSCALED_CYCLECLOCK
-
-#endif  // ABSL_BASE_INTERNAL_UNSCALEDCYCLECLOCK_H_
diff --git a/third_party/abseil/absl/base/invoke_test.cc b/third_party/abseil/absl/base/invoke_test.cc
deleted file mode 100644
index bcdef36..0000000
--- a/third_party/abseil/absl/base/invoke_test.cc
+++ /dev/null
@@ -1,229 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/invoke.h"
-
-#include <functional>
-#include <memory>
-#include <string>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/str_cat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-namespace {
-
-int Function(int a, int b) { return a - b; }
-
-int Sink(std::unique_ptr<int> p) {
-  return *p;
-}
-
-std::unique_ptr<int> Factory(int n) {
-  return make_unique<int>(n);
-}
-
-void NoOp() {}
-
-struct ConstFunctor {
-  int operator()(int a, int b) const { return a - b; }
-};
-
-struct MutableFunctor {
-  int operator()(int a, int b) { return a - b; }
-};
-
-struct EphemeralFunctor {
-  int operator()(int a, int b) && { return a - b; }
-};
-
-struct OverloadedFunctor {
-  template <typename... Args>
-  std::string operator()(const Args&... args) & {
-    return StrCat("&", args...);
-  }
-  template <typename... Args>
-  std::string operator()(const Args&... args) const& {
-    return StrCat("const&", args...);
-  }
-  template <typename... Args>
-  std::string operator()(const Args&... args) && {
-    return StrCat("&&", args...);
-  }
-};
-
-struct Class {
-  int Method(int a, int b) { return a - b; }
-  int ConstMethod(int a, int b) const { return a - b; }
-  int RefMethod(int a, int b) & { return a - b; }
-  int RefRefMethod(int a, int b) && { return a - b; }
-  int NoExceptMethod(int a, int b) noexcept { return a - b; }
-  int VolatileMethod(int a, int b) volatile { return a - b; }
-
-  int member;
-};
-
-struct FlipFlop {
-  int ConstMethod() const { return member; }
-  FlipFlop operator*() const { return {-member}; }
-
-  int member;
-};
-
-// CallMaybeWithArg(f) resolves either to invoke(f) or invoke(f, 42), depending
-// on which one is valid.
-template <typename F>
-decltype(base_internal::invoke(std::declval<const F&>())) CallMaybeWithArg(
-    const F& f) {
-  return base_internal::invoke(f);
-}
-
-template <typename F>
-decltype(base_internal::invoke(std::declval<const F&>(), 42)) CallMaybeWithArg(
-    const F& f) {
-  return base_internal::invoke(f, 42);
-}
-
-TEST(InvokeTest, Function) {
-  EXPECT_EQ(1, base_internal::invoke(Function, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Function, 3, 2));
-}
-
-TEST(InvokeTest, NonCopyableArgument) {
-  EXPECT_EQ(42, base_internal::invoke(Sink, make_unique<int>(42)));
-}
-
-TEST(InvokeTest, NonCopyableResult) {
-  EXPECT_THAT(base_internal::invoke(Factory, 42), ::testing::Pointee(42));
-}
-
-TEST(InvokeTest, VoidResult) { base_internal::invoke(NoOp); }
-
-TEST(InvokeTest, ConstFunctor) {
-  EXPECT_EQ(1, base_internal::invoke(ConstFunctor(), 3, 2));
-}
-
-TEST(InvokeTest, MutableFunctor) {
-  MutableFunctor f;
-  EXPECT_EQ(1, base_internal::invoke(f, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(MutableFunctor(), 3, 2));
-}
-
-TEST(InvokeTest, EphemeralFunctor) {
-  EphemeralFunctor f;
-  EXPECT_EQ(1, base_internal::invoke(std::move(f), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(EphemeralFunctor(), 3, 2));
-}
-
-TEST(InvokeTest, OverloadedFunctor) {
-  OverloadedFunctor f;
-  const OverloadedFunctor& cf = f;
-
-  EXPECT_EQ("&", base_internal::invoke(f));
-  EXPECT_EQ("& 42", base_internal::invoke(f, " 42"));
-
-  EXPECT_EQ("const&", base_internal::invoke(cf));
-  EXPECT_EQ("const& 42", base_internal::invoke(cf, " 42"));
-
-  EXPECT_EQ("&&", base_internal::invoke(std::move(f)));
-
-  OverloadedFunctor f2;
-  EXPECT_EQ("&& 42", base_internal::invoke(std::move(f2), " 42"));
-}
-
-TEST(InvokeTest, ReferenceWrapper) {
-  ConstFunctor cf;
-  MutableFunctor mf;
-  EXPECT_EQ(1, base_internal::invoke(std::cref(cf), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(std::ref(cf), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(std::ref(mf), 3, 2));
-}
-
-TEST(InvokeTest, MemberFunction) {
-  std::unique_ptr<Class> p(new Class);
-  std::unique_ptr<const Class> cp(new Class);
-  std::unique_ptr<volatile Class> vp(new Class);
-
-  EXPECT_EQ(1, base_internal::invoke(&Class::Method, p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::Method, p.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::Method, *p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::RefMethod, p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::RefMethod, p.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::RefMethod, *p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::RefRefMethod, std::move(*p), 3,
-                                     2));  // NOLINT
-  EXPECT_EQ(1, base_internal::invoke(&Class::NoExceptMethod, p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::NoExceptMethod, p.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::NoExceptMethod, *p, 3, 2));
-
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, p.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, *p, 3, 2));
-
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, cp, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, cp.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, *cp, 3, 2));
-
-  EXPECT_EQ(1, base_internal::invoke(&Class::VolatileMethod, p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::VolatileMethod, p.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::VolatileMethod, *p, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::VolatileMethod, vp, 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::VolatileMethod, vp.get(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::VolatileMethod, *vp, 3, 2));
-
-  EXPECT_EQ(1,
-            base_internal::invoke(&Class::Method, make_unique<Class>(), 3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod, make_unique<Class>(),
-                                     3, 2));
-  EXPECT_EQ(1, base_internal::invoke(&Class::ConstMethod,
-                                     make_unique<const Class>(), 3, 2));
-}
-
-TEST(InvokeTest, DataMember) {
-  std::unique_ptr<Class> p(new Class{42});
-  std::unique_ptr<const Class> cp(new Class{42});
-  EXPECT_EQ(42, base_internal::invoke(&Class::member, p));
-  EXPECT_EQ(42, base_internal::invoke(&Class::member, *p));
-  EXPECT_EQ(42, base_internal::invoke(&Class::member, p.get()));
-
-  base_internal::invoke(&Class::member, p) = 42;
-  base_internal::invoke(&Class::member, p.get()) = 42;
-
-  EXPECT_EQ(42, base_internal::invoke(&Class::member, cp));
-  EXPECT_EQ(42, base_internal::invoke(&Class::member, *cp));
-  EXPECT_EQ(42, base_internal::invoke(&Class::member, cp.get()));
-}
-
-TEST(InvokeTest, FlipFlop) {
-  FlipFlop obj = {42};
-  // This call could resolve to (obj.*&FlipFlop::ConstMethod)() or
-  // ((*obj).*&FlipFlop::ConstMethod)(). We verify that it's the former.
-  EXPECT_EQ(42, base_internal::invoke(&FlipFlop::ConstMethod, obj));
-  EXPECT_EQ(42, base_internal::invoke(&FlipFlop::member, obj));
-}
-
-TEST(InvokeTest, SfinaeFriendly) {
-  CallMaybeWithArg(NoOp);
-  EXPECT_THAT(CallMaybeWithArg(Factory), ::testing::Pointee(42));
-}
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/log_severity.cc b/third_party/abseil/absl/base/log_severity.cc
deleted file mode 100644
index 72312af..0000000
--- a/third_party/abseil/absl/base/log_severity.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/log_severity.h"
-
-#include <ostream>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-std::ostream& operator<<(std::ostream& os, absl::LogSeverity s) {
-  if (s == absl::NormalizeLogSeverity(s)) return os << absl::LogSeverityName(s);
-  return os << "absl::LogSeverity(" << static_cast<int>(s) << ")";
-}
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/log_severity.h b/third_party/abseil/absl/base/log_severity.h
deleted file mode 100644
index 045f17f..0000000
--- a/third_party/abseil/absl/base/log_severity.h
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_BASE_LOG_SEVERITY_H_
-#define ABSL_BASE_LOG_SEVERITY_H_
-
-#include <array>
-#include <ostream>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::LogSeverity
-//
-// Four severity levels are defined. Logging APIs should terminate the program
-// when a message is logged at severity `kFatal`; the other levels have no
-// special semantics.
-//
-// Values other than the four defined levels (e.g. produced by `static_cast`)
-// are valid, but their semantics when passed to a function, macro, or flag
-// depend on the function, macro, or flag. The usual behavior is to normalize
-// such values to a defined severity level, however in some cases values other
-// than the defined levels are useful for comparison.
-//
-// Exmaple:
-//
-//   // Effectively disables all logging:
-//   SetMinLogLevel(static_cast<absl::LogSeverity>(100));
-//
-// Abseil flags may be defined with type `LogSeverity`. Dependency layering
-// constraints require that the `AbslParseFlag()` overload be declared and
-// defined in the flags library itself rather than here. The `AbslUnparseFlag()`
-// overload is defined there as well for consistency.
-//
-// absl::LogSeverity Flag String Representation
-//
-// An `absl::LogSeverity` has a string representation used for parsing
-// command-line flags based on the enumerator name (e.g. `kFatal`) or
-// its unprefixed name (without the `k`) in any case-insensitive form. (E.g.
-// "FATAL", "fatal" or "Fatal" are all valid.) Unparsing such flags produces an
-// unprefixed string representation in all caps (e.g. "FATAL") or an integer.
-//
-// Additionally, the parser accepts arbitrary integers (as if the type were
-// `int`).
-//
-// Examples:
-//
-//   --my_log_level=kInfo
-//   --my_log_level=INFO
-//   --my_log_level=info
-//   --my_log_level=0
-//
-// Unparsing a flag produces the same result as `absl::LogSeverityName()` for
-// the standard levels and a base-ten integer otherwise.
-enum class LogSeverity : int {
-  kInfo = 0,
-  kWarning = 1,
-  kError = 2,
-  kFatal = 3,
-};
-
-// LogSeverities()
-//
-// Returns an iterable of all standard `absl::LogSeverity` values, ordered from
-// least to most severe.
-constexpr std::array<absl::LogSeverity, 4> LogSeverities() {
-  return {{absl::LogSeverity::kInfo, absl::LogSeverity::kWarning,
-           absl::LogSeverity::kError, absl::LogSeverity::kFatal}};
-}
-
-// LogSeverityName()
-//
-// Returns the all-caps string representation (e.g. "INFO") of the specified
-// severity level if it is one of the standard levels and "UNKNOWN" otherwise.
-constexpr const char* LogSeverityName(absl::LogSeverity s) {
-  return s == absl::LogSeverity::kInfo
-             ? "INFO"
-             : s == absl::LogSeverity::kWarning
-                   ? "WARNING"
-                   : s == absl::LogSeverity::kError
-                         ? "ERROR"
-                         : s == absl::LogSeverity::kFatal ? "FATAL" : "UNKNOWN";
-}
-
-// NormalizeLogSeverity()
-//
-// Values less than `kInfo` normalize to `kInfo`; values greater than `kFatal`
-// normalize to `kError` (**NOT** `kFatal`).
-constexpr absl::LogSeverity NormalizeLogSeverity(absl::LogSeverity s) {
-  return s < absl::LogSeverity::kInfo
-             ? absl::LogSeverity::kInfo
-             : s > absl::LogSeverity::kFatal ? absl::LogSeverity::kError : s;
-}
-constexpr absl::LogSeverity NormalizeLogSeverity(int s) {
-  return absl::NormalizeLogSeverity(static_cast<absl::LogSeverity>(s));
-}
-
-// operator<<
-//
-// The exact representation of a streamed `absl::LogSeverity` is deliberately
-// unspecified; do not rely on it.
-std::ostream& operator<<(std::ostream& os, absl::LogSeverity s);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_LOG_SEVERITY_H_
diff --git a/third_party/abseil/absl/base/log_severity_test.cc b/third_party/abseil/absl/base/log_severity_test.cc
deleted file mode 100644
index 2c6872b..0000000
--- a/third_party/abseil/absl/base/log_severity_test.cc
+++ /dev/null
@@ -1,204 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/log_severity.h"
-
-#include <cstdint>
-#include <ios>
-#include <limits>
-#include <ostream>
-#include <sstream>
-#include <string>
-#include <tuple>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/flags/internal/flag.h"
-#include "absl/flags/marshalling.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-using ::testing::Eq;
-using ::testing::IsFalse;
-using ::testing::IsTrue;
-using ::testing::TestWithParam;
-using ::testing::Values;
-
-std::string StreamHelper(absl::LogSeverity value) {
-  std::ostringstream stream;
-  stream << value;
-  return stream.str();
-}
-
-TEST(StreamTest, Works) {
-  EXPECT_THAT(StreamHelper(static_cast<absl::LogSeverity>(-100)),
-              Eq("absl::LogSeverity(-100)"));
-  EXPECT_THAT(StreamHelper(absl::LogSeverity::kInfo), Eq("INFO"));
-  EXPECT_THAT(StreamHelper(absl::LogSeverity::kWarning), Eq("WARNING"));
-  EXPECT_THAT(StreamHelper(absl::LogSeverity::kError), Eq("ERROR"));
-  EXPECT_THAT(StreamHelper(absl::LogSeverity::kFatal), Eq("FATAL"));
-  EXPECT_THAT(StreamHelper(static_cast<absl::LogSeverity>(4)),
-              Eq("absl::LogSeverity(4)"));
-}
-
-static_assert(
-    absl::flags_internal::FlagUseOneWordStorage<absl::LogSeverity>::value,
-    "Flags of type absl::LogSeverity ought to be lock-free.");
-
-using ParseFlagFromOutOfRangeIntegerTest = TestWithParam<int64_t>;
-INSTANTIATE_TEST_SUITE_P(
-    Instantiation, ParseFlagFromOutOfRangeIntegerTest,
-    Values(static_cast<int64_t>(std::numeric_limits<int>::min()) - 1,
-           static_cast<int64_t>(std::numeric_limits<int>::max()) + 1));
-TEST_P(ParseFlagFromOutOfRangeIntegerTest, ReturnsError) {
-  const std::string to_parse = absl::StrCat(GetParam());
-  absl::LogSeverity value;
-  std::string error;
-  EXPECT_THAT(absl::ParseFlag(to_parse, &value, &error), IsFalse()) << value;
-}
-
-using ParseFlagFromAlmostOutOfRangeIntegerTest = TestWithParam<int>;
-INSTANTIATE_TEST_SUITE_P(Instantiation,
-                         ParseFlagFromAlmostOutOfRangeIntegerTest,
-                         Values(std::numeric_limits<int>::min(),
-                                std::numeric_limits<int>::max()));
-TEST_P(ParseFlagFromAlmostOutOfRangeIntegerTest, YieldsExpectedValue) {
-  const auto expected = static_cast<absl::LogSeverity>(GetParam());
-  const std::string to_parse = absl::StrCat(GetParam());
-  absl::LogSeverity value;
-  std::string error;
-  ASSERT_THAT(absl::ParseFlag(to_parse, &value, &error), IsTrue()) << error;
-  EXPECT_THAT(value, Eq(expected));
-}
-
-using ParseFlagFromIntegerMatchingEnumeratorTest =
-    TestWithParam<std::tuple<absl::string_view, absl::LogSeverity>>;
-INSTANTIATE_TEST_SUITE_P(
-    Instantiation, ParseFlagFromIntegerMatchingEnumeratorTest,
-    Values(std::make_tuple("0", absl::LogSeverity::kInfo),
-           std::make_tuple(" 0", absl::LogSeverity::kInfo),
-           std::make_tuple("-0", absl::LogSeverity::kInfo),
-           std::make_tuple("+0", absl::LogSeverity::kInfo),
-           std::make_tuple("00", absl::LogSeverity::kInfo),
-           std::make_tuple("0 ", absl::LogSeverity::kInfo),
-           std::make_tuple("0x0", absl::LogSeverity::kInfo),
-           std::make_tuple("1", absl::LogSeverity::kWarning),
-           std::make_tuple("+1", absl::LogSeverity::kWarning),
-           std::make_tuple("2", absl::LogSeverity::kError),
-           std::make_tuple("3", absl::LogSeverity::kFatal)));
-TEST_P(ParseFlagFromIntegerMatchingEnumeratorTest, YieldsExpectedValue) {
-  const absl::string_view to_parse = std::get<0>(GetParam());
-  const absl::LogSeverity expected = std::get<1>(GetParam());
-  absl::LogSeverity value;
-  std::string error;
-  ASSERT_THAT(absl::ParseFlag(to_parse, &value, &error), IsTrue()) << error;
-  EXPECT_THAT(value, Eq(expected));
-}
-
-using ParseFlagFromOtherIntegerTest =
-    TestWithParam<std::tuple<absl::string_view, int>>;
-INSTANTIATE_TEST_SUITE_P(Instantiation, ParseFlagFromOtherIntegerTest,
-                         Values(std::make_tuple("-1", -1),
-                                std::make_tuple("4", 4),
-                                std::make_tuple("010", 10),
-                                std::make_tuple("0x10", 16)));
-TEST_P(ParseFlagFromOtherIntegerTest, YieldsExpectedValue) {
-  const absl::string_view to_parse = std::get<0>(GetParam());
-  const auto expected = static_cast<absl::LogSeverity>(std::get<1>(GetParam()));
-  absl::LogSeverity value;
-  std::string error;
-  ASSERT_THAT(absl::ParseFlag(to_parse, &value, &error), IsTrue()) << error;
-  EXPECT_THAT(value, Eq(expected));
-}
-
-using ParseFlagFromEnumeratorTest =
-    TestWithParam<std::tuple<absl::string_view, absl::LogSeverity>>;
-INSTANTIATE_TEST_SUITE_P(
-    Instantiation, ParseFlagFromEnumeratorTest,
-    Values(std::make_tuple("INFO", absl::LogSeverity::kInfo),
-           std::make_tuple("info", absl::LogSeverity::kInfo),
-           std::make_tuple("kInfo", absl::LogSeverity::kInfo),
-           std::make_tuple("iNfO", absl::LogSeverity::kInfo),
-           std::make_tuple("kInFo", absl::LogSeverity::kInfo),
-           std::make_tuple("WARNING", absl::LogSeverity::kWarning),
-           std::make_tuple("warning", absl::LogSeverity::kWarning),
-           std::make_tuple("kWarning", absl::LogSeverity::kWarning),
-           std::make_tuple("WaRnInG", absl::LogSeverity::kWarning),
-           std::make_tuple("KwArNiNg", absl::LogSeverity::kWarning),
-           std::make_tuple("ERROR", absl::LogSeverity::kError),
-           std::make_tuple("error", absl::LogSeverity::kError),
-           std::make_tuple("kError", absl::LogSeverity::kError),
-           std::make_tuple("eRrOr", absl::LogSeverity::kError),
-           std::make_tuple("kErRoR", absl::LogSeverity::kError),
-           std::make_tuple("FATAL", absl::LogSeverity::kFatal),
-           std::make_tuple("fatal", absl::LogSeverity::kFatal),
-           std::make_tuple("kFatal", absl::LogSeverity::kFatal),
-           std::make_tuple("FaTaL", absl::LogSeverity::kFatal),
-           std::make_tuple("KfAtAl", absl::LogSeverity::kFatal)));
-TEST_P(ParseFlagFromEnumeratorTest, YieldsExpectedValue) {
-  const absl::string_view to_parse = std::get<0>(GetParam());
-  const absl::LogSeverity expected = std::get<1>(GetParam());
-  absl::LogSeverity value;
-  std::string error;
-  ASSERT_THAT(absl::ParseFlag(to_parse, &value, &error), IsTrue()) << error;
-  EXPECT_THAT(value, Eq(expected));
-}
-
-using ParseFlagFromGarbageTest = TestWithParam<absl::string_view>;
-INSTANTIATE_TEST_SUITE_P(Instantiation, ParseFlagFromGarbageTest,
-                         Values("", "\0", " ", "garbage", "kkinfo", "I"));
-TEST_P(ParseFlagFromGarbageTest, ReturnsError) {
-  const absl::string_view to_parse = GetParam();
-  absl::LogSeverity value;
-  std::string error;
-  EXPECT_THAT(absl::ParseFlag(to_parse, &value, &error), IsFalse()) << value;
-}
-
-using UnparseFlagToEnumeratorTest =
-    TestWithParam<std::tuple<absl::LogSeverity, absl::string_view>>;
-INSTANTIATE_TEST_SUITE_P(
-    Instantiation, UnparseFlagToEnumeratorTest,
-    Values(std::make_tuple(absl::LogSeverity::kInfo, "INFO"),
-           std::make_tuple(absl::LogSeverity::kWarning, "WARNING"),
-           std::make_tuple(absl::LogSeverity::kError, "ERROR"),
-           std::make_tuple(absl::LogSeverity::kFatal, "FATAL")));
-TEST_P(UnparseFlagToEnumeratorTest, ReturnsExpectedValueAndRoundTrips) {
-  const absl::LogSeverity to_unparse = std::get<0>(GetParam());
-  const absl::string_view expected = std::get<1>(GetParam());
-  const std::string stringified_value = absl::UnparseFlag(to_unparse);
-  EXPECT_THAT(stringified_value, Eq(expected));
-  absl::LogSeverity reparsed_value;
-  std::string error;
-  EXPECT_THAT(absl::ParseFlag(stringified_value, &reparsed_value, &error),
-              IsTrue());
-  EXPECT_THAT(reparsed_value, Eq(to_unparse));
-}
-
-using UnparseFlagToOtherIntegerTest = TestWithParam<int>;
-INSTANTIATE_TEST_SUITE_P(Instantiation, UnparseFlagToOtherIntegerTest,
-                         Values(std::numeric_limits<int>::min(), -1, 4,
-                                std::numeric_limits<int>::max()));
-TEST_P(UnparseFlagToOtherIntegerTest, ReturnsExpectedValueAndRoundTrips) {
-  const absl::LogSeverity to_unparse =
-      static_cast<absl::LogSeverity>(GetParam());
-  const std::string expected = absl::StrCat(GetParam());
-  const std::string stringified_value = absl::UnparseFlag(to_unparse);
-  EXPECT_THAT(stringified_value, Eq(expected));
-  absl::LogSeverity reparsed_value;
-  std::string error;
-  EXPECT_THAT(absl::ParseFlag(stringified_value, &reparsed_value, &error),
-              IsTrue());
-  EXPECT_THAT(reparsed_value, Eq(to_unparse));
-}
-}  // namespace
diff --git a/third_party/abseil/absl/base/macros.h b/third_party/abseil/absl/base/macros.h
deleted file mode 100644
index 3e085a9..0000000
--- a/third_party/abseil/absl/base/macros.h
+++ /dev/null
@@ -1,158 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: macros.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the set of language macros used within Abseil code.
-// For the set of macros used to determine supported compilers and platforms,
-// see absl/base/config.h instead.
-//
-// This code is compiled directly on many platforms, including client
-// platforms like Windows, Mac, and embedded systems.  Before making
-// any changes here, make sure that you're not breaking any platforms.
-
-#ifndef ABSL_BASE_MACROS_H_
-#define ABSL_BASE_MACROS_H_
-
-#include <cassert>
-#include <cstddef>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-
-// ABSL_ARRAYSIZE()
-//
-// Returns the number of elements in an array as a compile-time constant, which
-// can be used in defining new arrays. If you use this macro on a pointer by
-// mistake, you will get a compile-time error.
-#define ABSL_ARRAYSIZE(array) \
-  (sizeof(::absl::macros_internal::ArraySizeHelper(array)))
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace macros_internal {
-// Note: this internal template function declaration is used by ABSL_ARRAYSIZE.
-// The function doesn't need a definition, as we only use its type.
-template <typename T, size_t N>
-auto ArraySizeHelper(const T (&array)[N]) -> char (&)[N];
-}  // namespace macros_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// ABSL_BAD_CALL_IF()
-//
-// Used on a function overload to trap bad calls: any call that matches the
-// overload will cause a compile-time error. This macro uses a clang-specific
-// "enable_if" attribute, as described at
-// https://clang.llvm.org/docs/AttributeReference.html#enable-if
-//
-// Overloads which use this macro should be bracketed by
-// `#ifdef ABSL_BAD_CALL_IF`.
-//
-// Example:
-//
-//   int isdigit(int c);
-//   #ifdef ABSL_BAD_CALL_IF
-//   int isdigit(int c)
-//     ABSL_BAD_CALL_IF(c <= -1 || c > 255,
-//                       "'c' must have the value of an unsigned char or EOF");
-//   #endif // ABSL_BAD_CALL_IF
-#if ABSL_HAVE_ATTRIBUTE(enable_if)
-#define ABSL_BAD_CALL_IF(expr, msg) \
-  __attribute__((enable_if(expr, "Bad call trap"), unavailable(msg)))
-#endif
-
-// ABSL_ASSERT()
-//
-// In C++11, `assert` can't be used portably within constexpr functions.
-// ABSL_ASSERT functions as a runtime assert but works in C++11 constexpr
-// functions.  Example:
-//
-// constexpr double Divide(double a, double b) {
-//   return ABSL_ASSERT(b != 0), a / b;
-// }
-//
-// This macro is inspired by
-// https://akrzemi1.wordpress.com/2017/05/18/asserts-in-constexpr-functions/
-#if defined(NDEBUG)
-#define ABSL_ASSERT(expr) \
-  (false ? static_cast<void>(expr) : static_cast<void>(0))
-#else
-#define ABSL_ASSERT(expr)                           \
-  (ABSL_PREDICT_TRUE((expr)) ? static_cast<void>(0) \
-                             : [] { assert(false && #expr); }())  // NOLINT
-#endif
-
-// `ABSL_INTERNAL_HARDENING_ABORT()` controls how `ABSL_HARDENING_ASSERT()`
-// aborts the program in release mode (when NDEBUG is defined). The
-// implementation should abort the program as quickly as possible and ideally it
-// should not be possible to ignore the abort request.
-#if (ABSL_HAVE_BUILTIN(__builtin_trap) &&         \
-     ABSL_HAVE_BUILTIN(__builtin_unreachable)) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_INTERNAL_HARDENING_ABORT() \
-  do {                                  \
-    __builtin_trap();                   \
-    __builtin_unreachable();            \
-  } while (false)
-#else
-#define ABSL_INTERNAL_HARDENING_ABORT() abort()
-#endif
-
-// ABSL_HARDENING_ASSERT()
-//
-// `ABSL_HARDENING_ASSERT()` is like `ABSL_ASSERT()`, but used to implement
-// runtime assertions that should be enabled in hardened builds even when
-// `NDEBUG` is defined.
-//
-// When `NDEBUG` is not defined, `ABSL_HARDENING_ASSERT()` is identical to
-// `ABSL_ASSERT()`.
-//
-// See `ABSL_OPTION_HARDENED` in `absl/base/options.h` for more information on
-// hardened mode.
-#if ABSL_OPTION_HARDENED == 1 && defined(NDEBUG)
-#define ABSL_HARDENING_ASSERT(expr)                 \
-  (ABSL_PREDICT_TRUE((expr)) ? static_cast<void>(0) \
-                             : [] { ABSL_INTERNAL_HARDENING_ABORT(); }())
-#else
-#define ABSL_HARDENING_ASSERT(expr) ABSL_ASSERT(expr)
-#endif
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-#define ABSL_INTERNAL_TRY try
-#define ABSL_INTERNAL_CATCH_ANY catch (...)
-#define ABSL_INTERNAL_RETHROW do { throw; } while (false)
-#else  // ABSL_HAVE_EXCEPTIONS
-#define ABSL_INTERNAL_TRY if (true)
-#define ABSL_INTERNAL_CATCH_ANY else if (false)
-#define ABSL_INTERNAL_RETHROW do {} while (false)
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-// `ABSL_INTERNAL_UNREACHABLE` is an unreachable statement.  A program which
-// reaches one has undefined behavior, and the compiler may optimize
-// accordingly.
-#if defined(__GNUC__) || ABSL_HAVE_BUILTIN(__builtin_unreachable)
-#define ABSL_INTERNAL_UNREACHABLE __builtin_unreachable()
-#elif defined(_MSC_VER)
-#define ABSL_INTERNAL_UNREACHABLE __assume(0)
-#else
-#define ABSL_INTERNAL_UNREACHABLE
-#endif
-
-#endif  // ABSL_BASE_MACROS_H_
diff --git a/third_party/abseil/absl/base/optimization.h b/third_party/abseil/absl/base/optimization.h
deleted file mode 100644
index 6332b62..0000000
--- a/third_party/abseil/absl/base/optimization.h
+++ /dev/null
@@ -1,243 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: optimization.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines portable macros for performance optimization.
-
-#ifndef ABSL_BASE_OPTIMIZATION_H_
-#define ABSL_BASE_OPTIMIZATION_H_
-
-#include <assert.h>
-
-#include "absl/base/config.h"
-
-// ABSL_BLOCK_TAIL_CALL_OPTIMIZATION
-//
-// Instructs the compiler to avoid optimizing tail-call recursion. This macro is
-// useful when you wish to preserve the existing function order within a stack
-// trace for logging, debugging, or profiling purposes.
-//
-// Example:
-//
-//   int f() {
-//     int result = g();
-//     ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
-//     return result;
-//   }
-#if defined(__pnacl__)
-#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() if (volatile int x = 0) { (void)x; }
-#elif defined(__clang__)
-// Clang will not tail call given inline volatile assembly.
-#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() __asm__ __volatile__("")
-#elif defined(__GNUC__)
-// GCC will not tail call given inline volatile assembly.
-#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() __asm__ __volatile__("")
-#elif defined(_MSC_VER)
-#include <intrin.h>
-// The __nop() intrinsic blocks the optimisation.
-#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() __nop()
-#else
-#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() if (volatile int x = 0) { (void)x; }
-#endif
-
-// ABSL_CACHELINE_SIZE
-//
-// Explicitly defines the size of the L1 cache for purposes of alignment.
-// Setting the cacheline size allows you to specify that certain objects be
-// aligned on a cacheline boundary with `ABSL_CACHELINE_ALIGNED` declarations.
-// (See below.)
-//
-// NOTE: this macro should be replaced with the following C++17 features, when
-// those are generally available:
-//
-//   * `std::hardware_constructive_interference_size`
-//   * `std::hardware_destructive_interference_size`
-//
-// See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0154r1.html
-// for more information.
-#if defined(__GNUC__)
-// Cache line alignment
-#if defined(__i386__) || defined(__x86_64__)
-#define ABSL_CACHELINE_SIZE 64
-#elif defined(__powerpc64__)
-#define ABSL_CACHELINE_SIZE 128
-#elif defined(__aarch64__)
-// We would need to read special register ctr_el0 to find out L1 dcache size.
-// This value is a good estimate based on a real aarch64 machine.
-#define ABSL_CACHELINE_SIZE 64
-#elif defined(__arm__)
-// Cache line sizes for ARM: These values are not strictly correct since
-// cache line sizes depend on implementations, not architectures.  There
-// are even implementations with cache line sizes configurable at boot
-// time.
-#if defined(__ARM_ARCH_5T__)
-#define ABSL_CACHELINE_SIZE 32
-#elif defined(__ARM_ARCH_7A__)
-#define ABSL_CACHELINE_SIZE 64
-#endif
-#endif
-
-#ifndef ABSL_CACHELINE_SIZE
-// A reasonable default guess.  Note that overestimates tend to waste more
-// space, while underestimates tend to waste more time.
-#define ABSL_CACHELINE_SIZE 64
-#endif
-
-// ABSL_CACHELINE_ALIGNED
-//
-// Indicates that the declared object be cache aligned using
-// `ABSL_CACHELINE_SIZE` (see above). Cacheline aligning objects allows you to
-// load a set of related objects in the L1 cache for performance improvements.
-// Cacheline aligning objects properly allows constructive memory sharing and
-// prevents destructive (or "false") memory sharing.
-//
-// NOTE: this macro should be replaced with usage of `alignas()` using
-// `std::hardware_constructive_interference_size` and/or
-// `std::hardware_destructive_interference_size` when available within C++17.
-//
-// See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0154r1.html
-// for more information.
-//
-// On some compilers, `ABSL_CACHELINE_ALIGNED` expands to an `__attribute__`
-// or `__declspec` attribute. For compilers where this is not known to work,
-// the macro expands to nothing.
-//
-// No further guarantees are made here. The result of applying the macro
-// to variables and types is always implementation-defined.
-//
-// WARNING: It is easy to use this attribute incorrectly, even to the point
-// of causing bugs that are difficult to diagnose, crash, etc. It does not
-// of itself guarantee that objects are aligned to a cache line.
-//
-// NOTE: Some compilers are picky about the locations of annotations such as
-// this attribute, so prefer to put it at the beginning of your declaration.
-// For example,
-//
-//   ABSL_CACHELINE_ALIGNED static Foo* foo = ...
-//
-//   class ABSL_CACHELINE_ALIGNED Bar { ...
-//
-// Recommendations:
-//
-// 1) Consult compiler documentation; this comment is not kept in sync as
-//    toolchains evolve.
-// 2) Verify your use has the intended effect. This often requires inspecting
-//    the generated machine code.
-// 3) Prefer applying this attribute to individual variables. Avoid
-//    applying it to types. This tends to localize the effect.
-#define ABSL_CACHELINE_ALIGNED __attribute__((aligned(ABSL_CACHELINE_SIZE)))
-#elif defined(_MSC_VER)
-#define ABSL_CACHELINE_SIZE 64
-#define ABSL_CACHELINE_ALIGNED __declspec(align(ABSL_CACHELINE_SIZE))
-#else
-#define ABSL_CACHELINE_SIZE 64
-#define ABSL_CACHELINE_ALIGNED
-#endif
-
-// ABSL_PREDICT_TRUE, ABSL_PREDICT_FALSE
-//
-// Enables the compiler to prioritize compilation using static analysis for
-// likely paths within a boolean branch.
-//
-// Example:
-//
-//   if (ABSL_PREDICT_TRUE(expression)) {
-//     return result;                        // Faster if more likely
-//   } else {
-//     return 0;
-//   }
-//
-// Compilers can use the information that a certain branch is not likely to be
-// taken (for instance, a CHECK failure) to optimize for the common case in
-// the absence of better information (ie. compiling gcc with `-fprofile-arcs`).
-//
-// Recommendation: Modern CPUs dynamically predict branch execution paths,
-// typically with accuracy greater than 97%. As a result, annotating every
-// branch in a codebase is likely counterproductive; however, annotating
-// specific branches that are both hot and consistently mispredicted is likely
-// to yield performance improvements.
-#if ABSL_HAVE_BUILTIN(__builtin_expect) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_PREDICT_FALSE(x) (__builtin_expect(false || (x), false))
-#define ABSL_PREDICT_TRUE(x) (__builtin_expect(false || (x), true))
-#else
-#define ABSL_PREDICT_FALSE(x) (x)
-#define ABSL_PREDICT_TRUE(x) (x)
-#endif
-
-// ABSL_INTERNAL_ASSUME(cond)
-// Informs the compiler that a condition is always true and that it can assume
-// it to be true for optimization purposes. The call has undefined behavior if
-// the condition is false.
-// In !NDEBUG mode, the condition is checked with an assert().
-// NOTE: The expression must not have side effects, as it will only be evaluated
-// in some compilation modes and not others.
-//
-// Example:
-//
-//   int x = ...;
-//   ABSL_INTERNAL_ASSUME(x >= 0);
-//   // The compiler can optimize the division to a simple right shift using the
-//   // assumption specified above.
-//   int y = x / 16;
-//
-#if !defined(NDEBUG)
-#define ABSL_INTERNAL_ASSUME(cond) assert(cond)
-#elif ABSL_HAVE_BUILTIN(__builtin_assume)
-#define ABSL_INTERNAL_ASSUME(cond) __builtin_assume(cond)
-#elif defined(__GNUC__) || ABSL_HAVE_BUILTIN(__builtin_unreachable)
-#define ABSL_INTERNAL_ASSUME(cond)        \
-  do {                                    \
-    if (!(cond)) __builtin_unreachable(); \
-  } while (0)
-#elif defined(_MSC_VER)
-#define ABSL_INTERNAL_ASSUME(cond) __assume(cond)
-#else
-#define ABSL_INTERNAL_ASSUME(cond)      \
-  do {                                  \
-    static_cast<void>(false && (cond)); \
-  } while (0)
-#endif
-
-// ABSL_INTERNAL_UNIQUE_SMALL_NAME(cond)
-// This macro forces small unique name on a static file level symbols like
-// static local variables or static functions. This is intended to be used in
-// macro definitions to optimize the cost of generated code. Do NOT use it on
-// symbols exported from translation unit since it may cause a link time
-// conflict.
-//
-// Example:
-//
-// #define MY_MACRO(txt)
-// namespace {
-//  char VeryVeryLongVarName[] ABSL_INTERNAL_UNIQUE_SMALL_NAME() = txt;
-//  const char* VeryVeryLongFuncName() ABSL_INTERNAL_UNIQUE_SMALL_NAME();
-//  const char* VeryVeryLongFuncName() { return txt; }
-// }
-//
-
-#if defined(__GNUC__)
-#define ABSL_INTERNAL_UNIQUE_SMALL_NAME2(x) #x
-#define ABSL_INTERNAL_UNIQUE_SMALL_NAME1(x) ABSL_INTERNAL_UNIQUE_SMALL_NAME2(x)
-#define ABSL_INTERNAL_UNIQUE_SMALL_NAME() \
-  asm(ABSL_INTERNAL_UNIQUE_SMALL_NAME1(.absl.__COUNTER__))
-#else
-#define ABSL_INTERNAL_UNIQUE_SMALL_NAME()
-#endif
-
-#endif  // ABSL_BASE_OPTIMIZATION_H_
diff --git a/third_party/abseil/absl/base/optimization_test.cc b/third_party/abseil/absl/base/optimization_test.cc
deleted file mode 100644
index e83369f..0000000
--- a/third_party/abseil/absl/base/optimization_test.cc
+++ /dev/null
@@ -1,129 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/optimization.h"
-
-#include "gtest/gtest.h"
-#include "absl/types/optional.h"
-
-namespace {
-
-// Tests for the ABSL_PREDICT_TRUE and ABSL_PREDICT_FALSE macros.
-// The tests only verify that the macros are functionally correct - i.e. code
-// behaves as if they weren't used. They don't try to check their impact on
-// optimization.
-
-TEST(PredictTest, PredictTrue) {
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(true));
-  EXPECT_FALSE(ABSL_PREDICT_TRUE(false));
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(1 == 1));
-  EXPECT_FALSE(ABSL_PREDICT_TRUE(1 == 2));
-
-  if (ABSL_PREDICT_TRUE(false)) ADD_FAILURE();
-  if (!ABSL_PREDICT_TRUE(true)) ADD_FAILURE();
-
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(true) && true);
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(true) || false);
-}
-
-TEST(PredictTest, PredictFalse) {
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(true));
-  EXPECT_FALSE(ABSL_PREDICT_FALSE(false));
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(1 == 1));
-  EXPECT_FALSE(ABSL_PREDICT_FALSE(1 == 2));
-
-  if (ABSL_PREDICT_FALSE(false)) ADD_FAILURE();
-  if (!ABSL_PREDICT_FALSE(true)) ADD_FAILURE();
-
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(true) && true);
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(true) || false);
-}
-
-TEST(PredictTest, OneEvaluation) {
-  // Verify that the expression is only evaluated once.
-  int x = 0;
-  if (ABSL_PREDICT_TRUE((++x) == 0)) ADD_FAILURE();
-  EXPECT_EQ(x, 1);
-  if (ABSL_PREDICT_FALSE((++x) == 0)) ADD_FAILURE();
-  EXPECT_EQ(x, 2);
-}
-
-TEST(PredictTest, OperatorOrder) {
-  // Verify that operator order inside and outside the macro behaves well.
-  // These would fail for a naive '#define ABSL_PREDICT_TRUE(x) x'
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(1 && 2) == true);
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(1 && 2) == true);
-  EXPECT_TRUE(!ABSL_PREDICT_TRUE(1 == 2));
-  EXPECT_TRUE(!ABSL_PREDICT_FALSE(1 == 2));
-}
-
-TEST(PredictTest, Pointer) {
-  const int x = 3;
-  const int *good_intptr = &x;
-  const int *null_intptr = nullptr;
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(good_intptr));
-  EXPECT_FALSE(ABSL_PREDICT_TRUE(null_intptr));
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(good_intptr));
-  EXPECT_FALSE(ABSL_PREDICT_FALSE(null_intptr));
-}
-
-TEST(PredictTest, Optional) {
-  // Note: An optional's truth value is the value's existence, not its truth.
-  absl::optional<bool> has_value(false);
-  absl::optional<bool> no_value;
-  EXPECT_TRUE(ABSL_PREDICT_TRUE(has_value));
-  EXPECT_FALSE(ABSL_PREDICT_TRUE(no_value));
-  EXPECT_TRUE(ABSL_PREDICT_FALSE(has_value));
-  EXPECT_FALSE(ABSL_PREDICT_FALSE(no_value));
-}
-
-class ImplictlyConvertibleToBool {
- public:
-  explicit ImplictlyConvertibleToBool(bool value) : value_(value) {}
-  operator bool() const {  // NOLINT(google-explicit-constructor)
-    return value_;
-  }
-
- private:
-  bool value_;
-};
-
-TEST(PredictTest, ImplicitBoolConversion) {
-  const ImplictlyConvertibleToBool is_true(true);
-  const ImplictlyConvertibleToBool is_false(false);
-  if (!ABSL_PREDICT_TRUE(is_true)) ADD_FAILURE();
-  if (ABSL_PREDICT_TRUE(is_false)) ADD_FAILURE();
-  if (!ABSL_PREDICT_FALSE(is_true)) ADD_FAILURE();
-  if (ABSL_PREDICT_FALSE(is_false)) ADD_FAILURE();
-}
-
-class ExplictlyConvertibleToBool {
- public:
-  explicit ExplictlyConvertibleToBool(bool value) : value_(value) {}
-  explicit operator bool() const { return value_; }
-
- private:
-  bool value_;
-};
-
-TEST(PredictTest, ExplicitBoolConversion) {
-  const ExplictlyConvertibleToBool is_true(true);
-  const ExplictlyConvertibleToBool is_false(false);
-  if (!ABSL_PREDICT_TRUE(is_true)) ADD_FAILURE();
-  if (ABSL_PREDICT_TRUE(is_false)) ADD_FAILURE();
-  if (!ABSL_PREDICT_FALSE(is_true)) ADD_FAILURE();
-  if (ABSL_PREDICT_FALSE(is_false)) ADD_FAILURE();
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/options.h b/third_party/abseil/absl/base/options.h
deleted file mode 100644
index 230bf1e..0000000
--- a/third_party/abseil/absl/base/options.h
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: options.h
-// -----------------------------------------------------------------------------
-//
-// This file contains Abseil configuration options for setting specific
-// implementations instead of letting Abseil determine which implementation to
-// use at compile-time. Setting these options may be useful for package or build
-// managers who wish to guarantee ABI stability within binary builds (which are
-// otherwise difficult to enforce).
-//
-// *** IMPORTANT NOTICE FOR PACKAGE MANAGERS:  It is important that
-// maintainers of package managers who wish to package Abseil read and
-// understand this file! ***
-//
-// Abseil contains a number of possible configuration endpoints, based on
-// parameters such as the detected platform, language version, or command-line
-// flags used to invoke the underlying binary. As is the case with all
-// libraries, binaries which contain Abseil code must ensure that separate
-// packages use the same compiled copy of Abseil to avoid a diamond dependency
-// problem, which can occur if two packages built with different Abseil
-// configuration settings are linked together. Diamond dependency problems in
-// C++ may manifest as violations to the One Definition Rule (ODR) (resulting in
-// linker errors), or undefined behavior (resulting in crashes).
-//
-// Diamond dependency problems can be avoided if all packages utilize the same
-// exact version of Abseil. Building from source code with the same compilation
-// parameters is the easiest way to avoid such dependency problems. However, for
-// package managers who cannot control such compilation parameters, we are
-// providing the file to allow you to inject ABI (Application Binary Interface)
-// stability across builds. Settings options in this file will neither change
-// API nor ABI, providing a stable copy of Abseil between packages.
-//
-// Care must be taken to keep options within these configurations isolated
-// from any other dynamic settings, such as command-line flags which could alter
-// these options. This file is provided specifically to help build and package
-// managers provide a stable copy of Abseil within their libraries and binaries;
-// other developers should not have need to alter the contents of this file.
-//
-// -----------------------------------------------------------------------------
-// Usage
-// -----------------------------------------------------------------------------
-//
-// For any particular package release, set the appropriate definitions within
-// this file to whatever value makes the most sense for your package(s). Note
-// that, by default, most of these options, at the moment, affect the
-// implementation of types; future options may affect other implementation
-// details.
-//
-// NOTE: the defaults within this file all assume that Abseil can select the
-// proper Abseil implementation at compile-time, which will not be sufficient
-// to guarantee ABI stability to package managers.
-
-#ifndef ABSL_BASE_OPTIONS_H_
-#define ABSL_BASE_OPTIONS_H_
-
-// Include a standard library header to allow configuration based on the
-// standard library in use.
-#ifdef __cplusplus
-#include <ciso646>
-#endif
-
-// -----------------------------------------------------------------------------
-// Type Compatibility Options
-// -----------------------------------------------------------------------------
-//
-// ABSL_OPTION_USE_STD_ANY
-//
-// This option controls whether absl::any is implemented as an alias to
-// std::any, or as an independent implementation.
-//
-// A value of 0 means to use Abseil's implementation.  This requires only C++11
-// support, and is expected to work on every toolchain we support.
-//
-// A value of 1 means to use an alias to std::any.  This requires that all code
-// using Abseil is built in C++17 mode or later.
-//
-// A value of 2 means to detect the C++ version being used to compile Abseil,
-// and use an alias only if a working std::any is available.  This option is
-// useful when you are building your entire program, including all of its
-// dependencies, from source.  It should not be used otherwise -- for example,
-// if you are distributing Abseil in a binary package manager -- since in
-// mode 2, absl::any will name a different type, with a different mangled name
-// and binary layout, depending on the compiler flags passed by the end user.
-// For more info, see https://abseil.io/about/design/dropin-types.
-//
-// User code should not inspect this macro.  To check in the preprocessor if
-// absl::any is a typedef of std::any, use the feature macro ABSL_USES_STD_ANY.
-
-#define ABSL_OPTION_USE_STD_ANY 2
-
-
-// ABSL_OPTION_USE_STD_OPTIONAL
-//
-// This option controls whether absl::optional is implemented as an alias to
-// std::optional, or as an independent implementation.
-//
-// A value of 0 means to use Abseil's implementation.  This requires only C++11
-// support, and is expected to work on every toolchain we support.
-//
-// A value of 1 means to use an alias to std::optional.  This requires that all
-// code using Abseil is built in C++17 mode or later.
-//
-// A value of 2 means to detect the C++ version being used to compile Abseil,
-// and use an alias only if a working std::optional is available.  This option
-// is useful when you are building your program from source.  It should not be
-// used otherwise -- for example, if you are distributing Abseil in a binary
-// package manager -- since in mode 2, absl::optional will name a different
-// type, with a different mangled name and binary layout, depending on the
-// compiler flags passed by the end user.  For more info, see
-// https://abseil.io/about/design/dropin-types.
-
-// User code should not inspect this macro.  To check in the preprocessor if
-// absl::optional is a typedef of std::optional, use the feature macro
-// ABSL_USES_STD_OPTIONAL.
-
-#define ABSL_OPTION_USE_STD_OPTIONAL 2
-
-
-// ABSL_OPTION_USE_STD_STRING_VIEW
-//
-// This option controls whether absl::string_view is implemented as an alias to
-// std::string_view, or as an independent implementation.
-//
-// A value of 0 means to use Abseil's implementation.  This requires only C++11
-// support, and is expected to work on every toolchain we support.
-//
-// A value of 1 means to use an alias to std::string_view.  This requires that
-// all code using Abseil is built in C++17 mode or later.
-//
-// A value of 2 means to detect the C++ version being used to compile Abseil,
-// and use an alias only if a working std::string_view is available.  This
-// option is useful when you are building your program from source.  It should
-// not be used otherwise -- for example, if you are distributing Abseil in a
-// binary package manager -- since in mode 2, absl::string_view will name a
-// different type, with a different mangled name and binary layout, depending on
-// the compiler flags passed by the end user.  For more info, see
-// https://abseil.io/about/design/dropin-types.
-//
-// User code should not inspect this macro.  To check in the preprocessor if
-// absl::string_view is a typedef of std::string_view, use the feature macro
-// ABSL_USES_STD_STRING_VIEW.
-
-#define ABSL_OPTION_USE_STD_STRING_VIEW 2
-
-// ABSL_OPTION_USE_STD_VARIANT
-//
-// This option controls whether absl::variant is implemented as an alias to
-// std::variant, or as an independent implementation.
-//
-// A value of 0 means to use Abseil's implementation.  This requires only C++11
-// support, and is expected to work on every toolchain we support.
-//
-// A value of 1 means to use an alias to std::variant.  This requires that all
-// code using Abseil is built in C++17 mode or later.
-//
-// A value of 2 means to detect the C++ version being used to compile Abseil,
-// and use an alias only if a working std::variant is available.  This option
-// is useful when you are building your program from source.  It should not be
-// used otherwise -- for example, if you are distributing Abseil in a binary
-// package manager -- since in mode 2, absl::variant will name a different
-// type, with a different mangled name and binary layout, depending on the
-// compiler flags passed by the end user.  For more info, see
-// https://abseil.io/about/design/dropin-types.
-//
-// User code should not inspect this macro.  To check in the preprocessor if
-// absl::variant is a typedef of std::variant, use the feature macro
-// ABSL_USES_STD_VARIANT.
-
-#define ABSL_OPTION_USE_STD_VARIANT 2
-
-
-// ABSL_OPTION_USE_INLINE_NAMESPACE
-// ABSL_OPTION_INLINE_NAMESPACE_NAME
-//
-// These options controls whether all entities in the absl namespace are
-// contained within an inner inline namespace.  This does not affect the
-// user-visible API of Abseil, but it changes the mangled names of all symbols.
-//
-// This can be useful as a version tag if you are distributing Abseil in
-// precompiled form.  This will prevent a binary library build of Abseil with
-// one inline namespace being used with headers configured with a different
-// inline namespace name.  Binary packagers are reminded that Abseil does not
-// guarantee any ABI stability in Abseil, so any update of Abseil or
-// configuration change in such a binary package should be combined with a
-// new, unique value for the inline namespace name.
-//
-// A value of 0 means not to use inline namespaces.
-//
-// A value of 1 means to use an inline namespace with the given name inside
-// namespace absl.  If this is set, ABSL_OPTION_INLINE_NAMESPACE_NAME must also
-// be changed to a new, unique identifier name.  In particular "head" is not
-// allowed.
-
-#define ABSL_OPTION_USE_INLINE_NAMESPACE 0
-#define ABSL_OPTION_INLINE_NAMESPACE_NAME head
-
-// ABSL_OPTION_HARDENED
-//
-// This option enables a "hardened" build in release mode (in this context,
-// release mode is defined as a build where the `NDEBUG` macro is defined).
-//
-// A value of 0 means that "hardened" mode is not enabled.
-//
-// A value of 1 means that "hardened" mode is enabled.
-//
-// Hardened builds have additional security checks enabled when `NDEBUG` is
-// defined. Defining `NDEBUG` is normally used to turn `assert()` macro into a
-// no-op, as well as disabling other bespoke program consistency checks. By
-// defining ABSL_OPTION_HARDENED to 1, a select set of checks remain enabled in
-// release mode. These checks guard against programming errors that may lead to
-// security vulnerabilities. In release mode, when one of these programming
-// errors is encountered, the program will immediately abort, possibly without
-// any attempt at logging.
-//
-// The checks enabled by this option are not free; they do incur runtime cost.
-//
-// The checks enabled by this option are always active when `NDEBUG` is not
-// defined, even in the case when ABSL_OPTION_HARDENED is defined to 0. The
-// checks enabled by this option may abort the program in a different way and
-// log additional information when `NDEBUG` is not defined.
-
-#define ABSL_OPTION_HARDENED 0
-
-#endif  // ABSL_BASE_OPTIONS_H_
diff --git a/third_party/abseil/absl/base/policy_checks.h b/third_party/abseil/absl/base/policy_checks.h
deleted file mode 100644
index 06b3243..0000000
--- a/third_party/abseil/absl/base/policy_checks.h
+++ /dev/null
@@ -1,111 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: policy_checks.h
-// -----------------------------------------------------------------------------
-//
-// This header enforces a minimum set of policies at build time, such as the
-// supported compiler and library versions. Unsupported configurations are
-// reported with `#error`. This enforcement is best effort, so successfully
-// compiling this header does not guarantee a supported configuration.
-
-#ifndef ABSL_BASE_POLICY_CHECKS_H_
-#define ABSL_BASE_POLICY_CHECKS_H_
-
-// Included for the __GLIBC_PREREQ macro used below.
-#include <limits.h>
-
-// Included for the _STLPORT_VERSION macro used below.
-#if defined(__cplusplus)
-#include <cstddef>
-#endif
-
-// -----------------------------------------------------------------------------
-// Operating System Check
-// -----------------------------------------------------------------------------
-
-#if defined(__CYGWIN__)
-#error "Cygwin is not supported."
-#endif
-
-// -----------------------------------------------------------------------------
-// Toolchain Check
-// -----------------------------------------------------------------------------
-
-// We support MSVC++ 14.0 update 2 and later.
-// This minimum will go up.
-#if defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190023918 && !defined(__clang__)
-#error "This package requires Visual Studio 2015 Update 2 or higher."
-#endif
-
-// We support gcc 4.7 and later.
-// This minimum will go up.
-#if defined(__GNUC__) && !defined(__clang__)
-#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
-#error "This package requires gcc 4.7 or higher."
-#endif
-#endif
-
-// We support Apple Xcode clang 4.2.1 (version 421.11.65) and later.
-// This corresponds to Apple Xcode version 4.5.
-// This minimum will go up.
-#if defined(__apple_build_version__) && __apple_build_version__ < 4211165
-#error "This package requires __apple_build_version__ of 4211165 or higher."
-#endif
-
-// -----------------------------------------------------------------------------
-// C++ Version Check
-// -----------------------------------------------------------------------------
-
-// Enforce C++11 as the minimum.  Note that Visual Studio has not
-// advanced __cplusplus despite being good enough for our purposes, so
-// so we exempt it from the check.
-#if defined(__cplusplus) && !defined(_MSC_VER)
-#if __cplusplus < 201103L
-#error "C++ versions less than C++11 are not supported."
-#endif
-#endif
-
-// -----------------------------------------------------------------------------
-// Standard Library Check
-// -----------------------------------------------------------------------------
-
-#if defined(_STLPORT_VERSION)
-#error "STLPort is not supported."
-#endif
-
-// -----------------------------------------------------------------------------
-// `char` Size Check
-// -----------------------------------------------------------------------------
-
-// Abseil currently assumes CHAR_BIT == 8. If you would like to use Abseil on a
-// platform where this is not the case, please provide us with the details about
-// your platform so we can consider relaxing this requirement.
-#if CHAR_BIT != 8
-#error "Abseil assumes CHAR_BIT == 8."
-#endif
-
-// -----------------------------------------------------------------------------
-// `int` Size Check
-// -----------------------------------------------------------------------------
-
-// Abseil currently assumes that an int is 4 bytes. If you would like to use
-// Abseil on a platform where this is not the case, please provide us with the
-// details about your platform so we can consider relaxing this requirement.
-#if INT_MAX < 2147483647
-#error "Abseil assumes that int is at least 4 bytes. "
-#endif
-
-#endif  // ABSL_BASE_POLICY_CHECKS_H_
diff --git a/third_party/abseil/absl/base/port.h b/third_party/abseil/absl/base/port.h
deleted file mode 100644
index 6c28068..0000000
--- a/third_party/abseil/absl/base/port.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This files is a forwarding header for other headers containing various
-// portability macros and functions.
-// This file is used for both C and C++!
-
-#ifndef ABSL_BASE_PORT_H_
-#define ABSL_BASE_PORT_H_
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/optimization.h"
-
-#endif  // ABSL_BASE_PORT_H_
diff --git a/third_party/abseil/absl/base/raw_logging_test.cc b/third_party/abseil/absl/base/raw_logging_test.cc
deleted file mode 100644
index 3d30bd3..0000000
--- a/third_party/abseil/absl/base/raw_logging_test.cc
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This test serves primarily as a compilation test for base/raw_logging.h.
-// Raw logging testing is covered by logging_unittest.cc, which is not as
-// portable as this test.
-
-#include "absl/base/internal/raw_logging.h"
-
-#include <tuple>
-
-#include "gtest/gtest.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-TEST(RawLoggingCompilationTest, Log) {
-  ABSL_RAW_LOG(INFO, "RAW INFO: %d", 1);
-  ABSL_RAW_LOG(INFO, "RAW INFO: %d %d", 1, 2);
-  ABSL_RAW_LOG(INFO, "RAW INFO: %d %d %d", 1, 2, 3);
-  ABSL_RAW_LOG(INFO, "RAW INFO: %d %d %d %d", 1, 2, 3, 4);
-  ABSL_RAW_LOG(INFO, "RAW INFO: %d %d %d %d %d", 1, 2, 3, 4, 5);
-  ABSL_RAW_LOG(WARNING, "RAW WARNING: %d", 1);
-  ABSL_RAW_LOG(ERROR, "RAW ERROR: %d", 1);
-}
-
-TEST(RawLoggingCompilationTest, PassingCheck) {
-  ABSL_RAW_CHECK(true, "RAW CHECK");
-}
-
-// Not all platforms support output from raw log, so we don't verify any
-// particular output for RAW check failures (expecting the empty string
-// accomplishes this).  This test is primarily a compilation test, but we
-// are verifying process death when EXPECT_DEATH works for a platform.
-const char kExpectedDeathOutput[] = "";
-
-TEST(RawLoggingDeathTest, FailingCheck) {
-  EXPECT_DEATH_IF_SUPPORTED(ABSL_RAW_CHECK(1 == 0, "explanation"),
-                            kExpectedDeathOutput);
-}
-
-TEST(RawLoggingDeathTest, LogFatal) {
-  EXPECT_DEATH_IF_SUPPORTED(ABSL_RAW_LOG(FATAL, "my dog has fleas"),
-                            kExpectedDeathOutput);
-}
-
-TEST(InternalLog, CompilationTest) {
-  ABSL_INTERNAL_LOG(INFO, "Internal Log");
-  std::string log_msg = "Internal Log";
-  ABSL_INTERNAL_LOG(INFO, log_msg);
-
-  ABSL_INTERNAL_LOG(INFO, log_msg + " 2");
-
-  float d = 1.1f;
-  ABSL_INTERNAL_LOG(INFO, absl::StrCat("Internal log ", 3, " + ", d));
-}
-
-TEST(InternalLogDeathTest, FailingCheck) {
-  EXPECT_DEATH_IF_SUPPORTED(ABSL_INTERNAL_CHECK(1 == 0, "explanation"),
-                            kExpectedDeathOutput);
-}
-
-TEST(InternalLogDeathTest, LogFatal) {
-  EXPECT_DEATH_IF_SUPPORTED(ABSL_INTERNAL_LOG(FATAL, "my dog has fleas"),
-                            kExpectedDeathOutput);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/base/spinlock_test_common.cc b/third_party/abseil/absl/base/spinlock_test_common.cc
deleted file mode 100644
index dee266e..0000000
--- a/third_party/abseil/absl/base/spinlock_test_common.cc
+++ /dev/null
@@ -1,271 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// A bunch of threads repeatedly hash an array of ints protected by a
-// spinlock.  If the spinlock is working properly, all elements of the
-// array should be equal at the end of the test.
-
-#include <cstdint>
-#include <limits>
-#include <random>
-#include <thread>  // NOLINT(build/c++11)
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/low_level_scheduling.h"
-#include "absl/base/internal/scheduling_mode.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/internal/sysinfo.h"
-#include "absl/base/macros.h"
-#include "absl/synchronization/blocking_counter.h"
-#include "absl/synchronization/notification.h"
-
-constexpr int32_t kNumThreads = 10;
-constexpr int32_t kIters = 1000;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// This is defined outside of anonymous namespace so that it can be
-// a friend of SpinLock to access protected methods for testing.
-struct SpinLockTest {
-  static uint32_t EncodeWaitCycles(int64_t wait_start_time,
-                                   int64_t wait_end_time) {
-    return SpinLock::EncodeWaitCycles(wait_start_time, wait_end_time);
-  }
-  static uint64_t DecodeWaitCycles(uint32_t lock_value) {
-    return SpinLock::DecodeWaitCycles(lock_value);
-  }
-};
-
-namespace {
-
-static constexpr int kArrayLength = 10;
-static uint32_t values[kArrayLength];
-
-ABSL_CONST_INIT static SpinLock static_cooperative_spinlock(
-    absl::kConstInit, base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL);
-ABSL_CONST_INIT static SpinLock static_noncooperative_spinlock(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-
-// Simple integer hash function based on the public domain lookup2 hash.
-// http://burtleburtle.net/bob/c/lookup2.c
-static uint32_t Hash32(uint32_t a, uint32_t c) {
-  uint32_t b = 0x9e3779b9UL;  // The golden ratio; an arbitrary value.
-  a -= b; a -= c; a ^= (c >> 13);
-  b -= c; b -= a; b ^= (a << 8);
-  c -= a; c -= b; c ^= (b >> 13);
-  a -= b; a -= c; a ^= (c >> 12);
-  b -= c; b -= a; b ^= (a << 16);
-  c -= a; c -= b; c ^= (b >> 5);
-  a -= b; a -= c; a ^= (c >> 3);
-  b -= c; b -= a; b ^= (a << 10);
-  c -= a; c -= b; c ^= (b >> 15);
-  return c;
-}
-
-static void TestFunction(int thread_salt, SpinLock* spinlock) {
-  for (int i = 0; i < kIters; i++) {
-    SpinLockHolder h(spinlock);
-    for (int j = 0; j < kArrayLength; j++) {
-      const int index = (j + thread_salt) % kArrayLength;
-      values[index] = Hash32(values[index], thread_salt);
-      std::this_thread::yield();
-    }
-  }
-}
-
-static void ThreadedTest(SpinLock* spinlock) {
-  std::vector<std::thread> threads;
-  for (int i = 0; i < kNumThreads; ++i) {
-    threads.push_back(std::thread(TestFunction, i, spinlock));
-  }
-  for (auto& thread : threads) {
-    thread.join();
-  }
-
-  SpinLockHolder h(spinlock);
-  for (int i = 1; i < kArrayLength; i++) {
-    EXPECT_EQ(values[0], values[i]);
-  }
-}
-
-#ifndef ABSL_HAVE_THREAD_SANITIZER
-static_assert(std::is_trivially_destructible<SpinLock>(), "");
-#endif
-
-TEST(SpinLock, StackNonCooperativeDisablesScheduling) {
-  SpinLock spinlock(base_internal::SCHEDULE_KERNEL_ONLY);
-  spinlock.Lock();
-  EXPECT_FALSE(base_internal::SchedulingGuard::ReschedulingIsAllowed());
-  spinlock.Unlock();
-}
-
-TEST(SpinLock, StaticNonCooperativeDisablesScheduling) {
-  static_noncooperative_spinlock.Lock();
-  EXPECT_FALSE(base_internal::SchedulingGuard::ReschedulingIsAllowed());
-  static_noncooperative_spinlock.Unlock();
-}
-
-TEST(SpinLock, WaitCyclesEncoding) {
-  // These are implementation details not exported by SpinLock.
-  const int kProfileTimestampShift = 7;
-  const int kLockwordReservedShift = 3;
-  const uint32_t kSpinLockSleeper = 8;
-
-  // We should be able to encode up to (1^kMaxCycleBits - 1) without clamping
-  // but the lower kProfileTimestampShift will be dropped.
-  const int kMaxCyclesShift =
-    32 - kLockwordReservedShift + kProfileTimestampShift;
-  const uint64_t kMaxCycles = (int64_t{1} << kMaxCyclesShift) - 1;
-
-  // These bits should be zero after encoding.
-  const uint32_t kLockwordReservedMask = (1 << kLockwordReservedShift) - 1;
-
-  // These bits are dropped when wait cycles are encoded.
-  const uint64_t kProfileTimestampMask = (1 << kProfileTimestampShift) - 1;
-
-  // Test a bunch of random values
-  std::default_random_engine generator;
-  // Shift to avoid overflow below.
-  std::uniform_int_distribution<uint64_t> time_distribution(
-      0, std::numeric_limits<uint64_t>::max() >> 4);
-  std::uniform_int_distribution<uint64_t> cycle_distribution(0, kMaxCycles);
-
-  for (int i = 0; i < 100; i++) {
-    int64_t start_time = time_distribution(generator);
-    int64_t cycles = cycle_distribution(generator);
-    int64_t end_time = start_time + cycles;
-    uint32_t lock_value = SpinLockTest::EncodeWaitCycles(start_time, end_time);
-    EXPECT_EQ(0, lock_value & kLockwordReservedMask);
-    uint64_t decoded = SpinLockTest::DecodeWaitCycles(lock_value);
-    EXPECT_EQ(0, decoded & kProfileTimestampMask);
-    EXPECT_EQ(cycles & ~kProfileTimestampMask, decoded);
-  }
-
-  // Test corner cases
-  int64_t start_time = time_distribution(generator);
-  EXPECT_EQ(kSpinLockSleeper,
-            SpinLockTest::EncodeWaitCycles(start_time, start_time));
-  EXPECT_EQ(0, SpinLockTest::DecodeWaitCycles(0));
-  EXPECT_EQ(0, SpinLockTest::DecodeWaitCycles(kLockwordReservedMask));
-  EXPECT_EQ(kMaxCycles & ~kProfileTimestampMask,
-            SpinLockTest::DecodeWaitCycles(~kLockwordReservedMask));
-
-  // Check that we cannot produce kSpinLockSleeper during encoding.
-  int64_t sleeper_cycles =
-      kSpinLockSleeper << (kProfileTimestampShift - kLockwordReservedShift);
-  uint32_t sleeper_value =
-      SpinLockTest::EncodeWaitCycles(start_time, start_time + sleeper_cycles);
-  EXPECT_NE(sleeper_value, kSpinLockSleeper);
-
-  // Test clamping
-  uint32_t max_value =
-    SpinLockTest::EncodeWaitCycles(start_time, start_time + kMaxCycles);
-  uint64_t max_value_decoded = SpinLockTest::DecodeWaitCycles(max_value);
-  uint64_t expected_max_value_decoded = kMaxCycles & ~kProfileTimestampMask;
-  EXPECT_EQ(expected_max_value_decoded, max_value_decoded);
-
-  const int64_t step = (1 << kProfileTimestampShift);
-  uint32_t after_max_value =
-    SpinLockTest::EncodeWaitCycles(start_time, start_time + kMaxCycles + step);
-  uint64_t after_max_value_decoded =
-      SpinLockTest::DecodeWaitCycles(after_max_value);
-  EXPECT_EQ(expected_max_value_decoded, after_max_value_decoded);
-
-  uint32_t before_max_value = SpinLockTest::EncodeWaitCycles(
-      start_time, start_time + kMaxCycles - step);
-  uint64_t before_max_value_decoded =
-    SpinLockTest::DecodeWaitCycles(before_max_value);
-  EXPECT_GT(expected_max_value_decoded, before_max_value_decoded);
-}
-
-TEST(SpinLockWithThreads, StackSpinLock) {
-  SpinLock spinlock;
-  ThreadedTest(&spinlock);
-}
-
-TEST(SpinLockWithThreads, StackCooperativeSpinLock) {
-  SpinLock spinlock(base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL);
-  ThreadedTest(&spinlock);
-}
-
-TEST(SpinLockWithThreads, StackNonCooperativeSpinLock) {
-  SpinLock spinlock(base_internal::SCHEDULE_KERNEL_ONLY);
-  ThreadedTest(&spinlock);
-}
-
-TEST(SpinLockWithThreads, StaticCooperativeSpinLock) {
-  ThreadedTest(&static_cooperative_spinlock);
-}
-
-TEST(SpinLockWithThreads, StaticNonCooperativeSpinLock) {
-  ThreadedTest(&static_noncooperative_spinlock);
-}
-
-TEST(SpinLockWithThreads, DoesNotDeadlock) {
-  struct Helper {
-    static void NotifyThenLock(Notification* locked, SpinLock* spinlock,
-                               BlockingCounter* b) {
-      locked->WaitForNotification();  // Wait for LockThenWait() to hold "s".
-      b->DecrementCount();
-      SpinLockHolder l(spinlock);
-    }
-
-    static void LockThenWait(Notification* locked, SpinLock* spinlock,
-                             BlockingCounter* b) {
-      SpinLockHolder l(spinlock);
-      locked->Notify();
-      b->Wait();
-    }
-
-    static void DeadlockTest(SpinLock* spinlock, int num_spinners) {
-      Notification locked;
-      BlockingCounter counter(num_spinners);
-      std::vector<std::thread> threads;
-
-      threads.push_back(
-          std::thread(Helper::LockThenWait, &locked, spinlock, &counter));
-      for (int i = 0; i < num_spinners; ++i) {
-        threads.push_back(
-            std::thread(Helper::NotifyThenLock, &locked, spinlock, &counter));
-      }
-
-      for (auto& thread : threads) {
-        thread.join();
-      }
-    }
-  };
-
-  SpinLock stack_cooperative_spinlock(
-      base_internal::SCHEDULE_COOPERATIVE_AND_KERNEL);
-  SpinLock stack_noncooperative_spinlock(base_internal::SCHEDULE_KERNEL_ONLY);
-  Helper::DeadlockTest(&stack_cooperative_spinlock,
-                       base_internal::NumCPUs() * 2);
-  Helper::DeadlockTest(&stack_noncooperative_spinlock,
-                       base_internal::NumCPUs() * 2);
-  Helper::DeadlockTest(&static_cooperative_spinlock,
-                       base_internal::NumCPUs() * 2);
-  Helper::DeadlockTest(&static_noncooperative_spinlock,
-                       base_internal::NumCPUs() * 2);
-}
-
-}  // namespace
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/base/thread_annotations.h b/third_party/abseil/absl/base/thread_annotations.h
deleted file mode 100644
index e23fff1..0000000
--- a/third_party/abseil/absl/base/thread_annotations.h
+++ /dev/null
@@ -1,335 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: thread_annotations.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains macro definitions for thread safety annotations
-// that allow developers to document the locking policies of multi-threaded
-// code. The annotations can also help program analysis tools to identify
-// potential thread safety issues.
-//
-// These annotations are implemented using compiler attributes. Using the macros
-// defined here instead of raw attributes allow for portability and future
-// compatibility.
-//
-// When referring to mutexes in the arguments of the attributes, you should
-// use variable names or more complex expressions (e.g. my_object->mutex_)
-// that evaluate to a concrete mutex object whenever possible. If the mutex
-// you want to refer to is not in scope, you may use a member pointer
-// (e.g. &MyClass::mutex_) to refer to a mutex in some (unknown) object.
-
-#ifndef ABSL_BASE_THREAD_ANNOTATIONS_H_
-#define ABSL_BASE_THREAD_ANNOTATIONS_H_
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-// TODO(mbonadei): Remove after the backward compatibility period.
-#include "absl/base/internal/thread_annotations.h"  // IWYU pragma: export
-
-// ABSL_GUARDED_BY()
-//
-// Documents if a shared field or global variable needs to be protected by a
-// mutex. ABSL_GUARDED_BY() allows the user to specify a particular mutex that
-// should be held when accessing the annotated variable.
-//
-// Although this annotation (and ABSL_PT_GUARDED_BY, below) cannot be applied to
-// local variables, a local variable and its associated mutex can often be
-// combined into a small class or struct, thereby allowing the annotation.
-//
-// Example:
-//
-//   class Foo {
-//     Mutex mu_;
-//     int p1_ ABSL_GUARDED_BY(mu_);
-//     ...
-//   };
-#if ABSL_HAVE_ATTRIBUTE(guarded_by)
-#define ABSL_GUARDED_BY(x) __attribute__((guarded_by(x)))
-#else
-#define ABSL_GUARDED_BY(x)
-#endif
-
-// ABSL_PT_GUARDED_BY()
-//
-// Documents if the memory location pointed to by a pointer should be guarded
-// by a mutex when dereferencing the pointer.
-//
-// Example:
-//   class Foo {
-//     Mutex mu_;
-//     int *p1_ ABSL_PT_GUARDED_BY(mu_);
-//     ...
-//   };
-//
-// Note that a pointer variable to a shared memory location could itself be a
-// shared variable.
-//
-// Example:
-//
-//   // `q_`, guarded by `mu1_`, points to a shared memory location that is
-//   // guarded by `mu2_`:
-//   int *q_ ABSL_GUARDED_BY(mu1_) ABSL_PT_GUARDED_BY(mu2_);
-#if ABSL_HAVE_ATTRIBUTE(pt_guarded_by)
-#define ABSL_PT_GUARDED_BY(x) __attribute__((pt_guarded_by(x)))
-#else
-#define ABSL_PT_GUARDED_BY(x)
-#endif
-
-// ABSL_ACQUIRED_AFTER() / ABSL_ACQUIRED_BEFORE()
-//
-// Documents the acquisition order between locks that can be held
-// simultaneously by a thread. For any two locks that need to be annotated
-// to establish an acquisition order, only one of them needs the annotation.
-// (i.e. You don't have to annotate both locks with both ABSL_ACQUIRED_AFTER
-// and ABSL_ACQUIRED_BEFORE.)
-//
-// As with ABSL_GUARDED_BY, this is only applicable to mutexes that are shared
-// fields or global variables.
-//
-// Example:
-//
-//   Mutex m1_;
-//   Mutex m2_ ABSL_ACQUIRED_AFTER(m1_);
-#if ABSL_HAVE_ATTRIBUTE(acquired_after)
-#define ABSL_ACQUIRED_AFTER(...) __attribute__((acquired_after(__VA_ARGS__)))
-#else
-#define ABSL_ACQUIRED_AFTER(...)
-#endif
-
-#if ABSL_HAVE_ATTRIBUTE(acquired_before)
-#define ABSL_ACQUIRED_BEFORE(...) __attribute__((acquired_before(__VA_ARGS__)))
-#else
-#define ABSL_ACQUIRED_BEFORE(...)
-#endif
-
-// ABSL_EXCLUSIVE_LOCKS_REQUIRED() / ABSL_SHARED_LOCKS_REQUIRED()
-//
-// Documents a function that expects a mutex to be held prior to entry.
-// The mutex is expected to be held both on entry to, and exit from, the
-// function.
-//
-// An exclusive lock allows read-write access to the guarded data member(s), and
-// only one thread can acquire a lock exclusively at any one time. A shared lock
-// allows read-only access, and any number of threads can acquire a shared lock
-// concurrently.
-//
-// Generally, non-const methods should be annotated with
-// ABSL_EXCLUSIVE_LOCKS_REQUIRED, while const methods should be annotated with
-// ABSL_SHARED_LOCKS_REQUIRED.
-//
-// Example:
-//
-//   Mutex mu1, mu2;
-//   int a ABSL_GUARDED_BY(mu1);
-//   int b ABSL_GUARDED_BY(mu2);
-//
-//   void foo() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu1, mu2) { ... }
-//   void bar() const ABSL_SHARED_LOCKS_REQUIRED(mu1, mu2) { ... }
-#if ABSL_HAVE_ATTRIBUTE(exclusive_locks_required)
-#define ABSL_EXCLUSIVE_LOCKS_REQUIRED(...) \
-  __attribute__((exclusive_locks_required(__VA_ARGS__)))
-#else
-#define ABSL_EXCLUSIVE_LOCKS_REQUIRED(...)
-#endif
-
-#if ABSL_HAVE_ATTRIBUTE(shared_locks_required)
-#define ABSL_SHARED_LOCKS_REQUIRED(...) \
-  __attribute__((shared_locks_required(__VA_ARGS__)))
-#else
-#define ABSL_SHARED_LOCKS_REQUIRED(...)
-#endif
-
-// ABSL_LOCKS_EXCLUDED()
-//
-// Documents the locks acquired in the body of the function. These locks
-// cannot be held when calling this function (as Abseil's `Mutex` locks are
-// non-reentrant).
-#if ABSL_HAVE_ATTRIBUTE(locks_excluded)
-#define ABSL_LOCKS_EXCLUDED(...) __attribute__((locks_excluded(__VA_ARGS__)))
-#else
-#define ABSL_LOCKS_EXCLUDED(...)
-#endif
-
-// ABSL_LOCK_RETURNED()
-//
-// Documents a function that returns a mutex without acquiring it.  For example,
-// a public getter method that returns a pointer to a private mutex should
-// be annotated with ABSL_LOCK_RETURNED.
-#if ABSL_HAVE_ATTRIBUTE(lock_returned)
-#define ABSL_LOCK_RETURNED(x) __attribute__((lock_returned(x)))
-#else
-#define ABSL_LOCK_RETURNED(x)
-#endif
-
-// ABSL_LOCKABLE
-//
-// Documents if a class/type is a lockable type (such as the `Mutex` class).
-#if ABSL_HAVE_ATTRIBUTE(lockable)
-#define ABSL_LOCKABLE __attribute__((lockable))
-#else
-#define ABSL_LOCKABLE
-#endif
-
-// ABSL_SCOPED_LOCKABLE
-//
-// Documents if a class does RAII locking (such as the `MutexLock` class).
-// The constructor should use `LOCK_FUNCTION()` to specify the mutex that is
-// acquired, and the destructor should use `UNLOCK_FUNCTION()` with no
-// arguments; the analysis will assume that the destructor unlocks whatever the
-// constructor locked.
-#if ABSL_HAVE_ATTRIBUTE(scoped_lockable)
-#define ABSL_SCOPED_LOCKABLE __attribute__((scoped_lockable))
-#else
-#define ABSL_SCOPED_LOCKABLE
-#endif
-
-// ABSL_EXCLUSIVE_LOCK_FUNCTION()
-//
-// Documents functions that acquire a lock in the body of a function, and do
-// not release it.
-#if ABSL_HAVE_ATTRIBUTE(exclusive_lock_function)
-#define ABSL_EXCLUSIVE_LOCK_FUNCTION(...) \
-  __attribute__((exclusive_lock_function(__VA_ARGS__)))
-#else
-#define ABSL_EXCLUSIVE_LOCK_FUNCTION(...)
-#endif
-
-// ABSL_SHARED_LOCK_FUNCTION()
-//
-// Documents functions that acquire a shared (reader) lock in the body of a
-// function, and do not release it.
-#if ABSL_HAVE_ATTRIBUTE(shared_lock_function)
-#define ABSL_SHARED_LOCK_FUNCTION(...) \
-  __attribute__((shared_lock_function(__VA_ARGS__)))
-#else
-#define ABSL_SHARED_LOCK_FUNCTION(...)
-#endif
-
-// ABSL_UNLOCK_FUNCTION()
-//
-// Documents functions that expect a lock to be held on entry to the function,
-// and release it in the body of the function.
-#if ABSL_HAVE_ATTRIBUTE(unlock_function)
-#define ABSL_UNLOCK_FUNCTION(...) __attribute__((unlock_function(__VA_ARGS__)))
-#else
-#define ABSL_UNLOCK_FUNCTION(...)
-#endif
-
-// ABSL_EXCLUSIVE_TRYLOCK_FUNCTION() / ABSL_SHARED_TRYLOCK_FUNCTION()
-//
-// Documents functions that try to acquire a lock, and return success or failure
-// (or a non-boolean value that can be interpreted as a boolean).
-// The first argument should be `true` for functions that return `true` on
-// success, or `false` for functions that return `false` on success. The second
-// argument specifies the mutex that is locked on success. If unspecified, this
-// mutex is assumed to be `this`.
-#if ABSL_HAVE_ATTRIBUTE(exclusive_trylock_function)
-#define ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(...) \
-  __attribute__((exclusive_trylock_function(__VA_ARGS__)))
-#else
-#define ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(...)
-#endif
-
-#if ABSL_HAVE_ATTRIBUTE(shared_trylock_function)
-#define ABSL_SHARED_TRYLOCK_FUNCTION(...) \
-  __attribute__((shared_trylock_function(__VA_ARGS__)))
-#else
-#define ABSL_SHARED_TRYLOCK_FUNCTION(...)
-#endif
-
-// ABSL_ASSERT_EXCLUSIVE_LOCK() / ABSL_ASSERT_SHARED_LOCK()
-//
-// Documents functions that dynamically check to see if a lock is held, and fail
-// if it is not held.
-#if ABSL_HAVE_ATTRIBUTE(assert_exclusive_lock)
-#define ABSL_ASSERT_EXCLUSIVE_LOCK(...) \
-  __attribute__((assert_exclusive_lock(__VA_ARGS__)))
-#else
-#define ABSL_ASSERT_EXCLUSIVE_LOCK(...)
-#endif
-
-#if ABSL_HAVE_ATTRIBUTE(assert_shared_lock)
-#define ABSL_ASSERT_SHARED_LOCK(...) \
-  __attribute__((assert_shared_lock(__VA_ARGS__)))
-#else
-#define ABSL_ASSERT_SHARED_LOCK(...)
-#endif
-
-// ABSL_NO_THREAD_SAFETY_ANALYSIS
-//
-// Turns off thread safety checking within the body of a particular function.
-// This annotation is used to mark functions that are known to be correct, but
-// the locking behavior is more complicated than the analyzer can handle.
-#if ABSL_HAVE_ATTRIBUTE(no_thread_safety_analysis)
-#define ABSL_NO_THREAD_SAFETY_ANALYSIS \
-  __attribute__((no_thread_safety_analysis))
-#else
-#define ABSL_NO_THREAD_SAFETY_ANALYSIS
-#endif
-
-//------------------------------------------------------------------------------
-// Tool-Supplied Annotations
-//------------------------------------------------------------------------------
-
-// ABSL_TS_UNCHECKED should be placed around lock expressions that are not valid
-// C++ syntax, but which are present for documentation purposes.  These
-// annotations will be ignored by the analysis.
-#define ABSL_TS_UNCHECKED(x) ""
-
-// ABSL_TS_FIXME is used to mark lock expressions that are not valid C++ syntax.
-// It is used by automated tools to mark and disable invalid expressions.
-// The annotation should either be fixed, or changed to ABSL_TS_UNCHECKED.
-#define ABSL_TS_FIXME(x) ""
-
-// Like ABSL_NO_THREAD_SAFETY_ANALYSIS, this turns off checking within the body
-// of a particular function.  However, this attribute is used to mark functions
-// that are incorrect and need to be fixed.  It is used by automated tools to
-// avoid breaking the build when the analysis is updated.
-// Code owners are expected to eventually fix the routine.
-#define ABSL_NO_THREAD_SAFETY_ANALYSIS_FIXME ABSL_NO_THREAD_SAFETY_ANALYSIS
-
-// Similar to ABSL_NO_THREAD_SAFETY_ANALYSIS_FIXME, this macro marks a
-// ABSL_GUARDED_BY annotation that needs to be fixed, because it is producing
-// thread safety warning. It disables the ABSL_GUARDED_BY.
-#define ABSL_GUARDED_BY_FIXME(x)
-
-// Disables warnings for a single read operation.  This can be used to avoid
-// warnings when it is known that the read is not actually involved in a race,
-// but the compiler cannot confirm that.
-#define ABSL_TS_UNCHECKED_READ(x) absl::base_internal::ts_unchecked_read(x)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace base_internal {
-
-// Takes a reference to a guarded data member, and returns an unguarded
-// reference.
-// Do not used this function directly, use ABSL_TS_UNCHECKED_READ instead.
-template <typename T>
-inline const T& ts_unchecked_read(const T& v) ABSL_NO_THREAD_SAFETY_ANALYSIS {
-  return v;
-}
-
-template <typename T>
-inline T& ts_unchecked_read(T& v) ABSL_NO_THREAD_SAFETY_ANALYSIS {
-  return v;
-}
-
-}  // namespace base_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_BASE_THREAD_ANNOTATIONS_H_
diff --git a/third_party/abseil/absl/base/throw_delegate_test.cc b/third_party/abseil/absl/base/throw_delegate_test.cc
deleted file mode 100644
index 5ba4ce5..0000000
--- a/third_party/abseil/absl/base/throw_delegate_test.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/internal/throw_delegate.h"
-
-#include <functional>
-#include <new>
-#include <stdexcept>
-
-#include "absl/base/config.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-using absl::base_internal::ThrowStdLogicError;
-using absl::base_internal::ThrowStdInvalidArgument;
-using absl::base_internal::ThrowStdDomainError;
-using absl::base_internal::ThrowStdLengthError;
-using absl::base_internal::ThrowStdOutOfRange;
-using absl::base_internal::ThrowStdRuntimeError;
-using absl::base_internal::ThrowStdRangeError;
-using absl::base_internal::ThrowStdOverflowError;
-using absl::base_internal::ThrowStdUnderflowError;
-using absl::base_internal::ThrowStdBadFunctionCall;
-using absl::base_internal::ThrowStdBadAlloc;
-
-constexpr const char* what_arg = "The quick brown fox jumps over the lazy dog";
-
-template <typename E>
-void ExpectThrowChar(void (*f)(const char*)) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  try {
-    f(what_arg);
-    FAIL() << "Didn't throw";
-  } catch (const E& e) {
-    EXPECT_STREQ(e.what(), what_arg);
-  }
-#else
-  EXPECT_DEATH_IF_SUPPORTED(f(what_arg), what_arg);
-#endif
-}
-
-template <typename E>
-void ExpectThrowString(void (*f)(const std::string&)) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  try {
-    f(what_arg);
-    FAIL() << "Didn't throw";
-  } catch (const E& e) {
-    EXPECT_STREQ(e.what(), what_arg);
-  }
-#else
-  EXPECT_DEATH_IF_SUPPORTED(f(what_arg), what_arg);
-#endif
-}
-
-template <typename E>
-void ExpectThrowNoWhat(void (*f)()) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  try {
-    f();
-    FAIL() << "Didn't throw";
-  } catch (const E& e) {
-  }
-#else
-  EXPECT_DEATH_IF_SUPPORTED(f(), "");
-#endif
-}
-
-TEST(ThrowHelper, Test) {
-  // Not using EXPECT_THROW because we want to check the .what() message too.
-  ExpectThrowChar<std::logic_error>(ThrowStdLogicError);
-  ExpectThrowChar<std::invalid_argument>(ThrowStdInvalidArgument);
-  ExpectThrowChar<std::domain_error>(ThrowStdDomainError);
-  ExpectThrowChar<std::length_error>(ThrowStdLengthError);
-  ExpectThrowChar<std::out_of_range>(ThrowStdOutOfRange);
-  ExpectThrowChar<std::runtime_error>(ThrowStdRuntimeError);
-  ExpectThrowChar<std::range_error>(ThrowStdRangeError);
-  ExpectThrowChar<std::overflow_error>(ThrowStdOverflowError);
-  ExpectThrowChar<std::underflow_error>(ThrowStdUnderflowError);
-
-  ExpectThrowString<std::logic_error>(ThrowStdLogicError);
-  ExpectThrowString<std::invalid_argument>(ThrowStdInvalidArgument);
-  ExpectThrowString<std::domain_error>(ThrowStdDomainError);
-  ExpectThrowString<std::length_error>(ThrowStdLengthError);
-  ExpectThrowString<std::out_of_range>(ThrowStdOutOfRange);
-  ExpectThrowString<std::runtime_error>(ThrowStdRuntimeError);
-  ExpectThrowString<std::range_error>(ThrowStdRangeError);
-  ExpectThrowString<std::overflow_error>(ThrowStdOverflowError);
-  ExpectThrowString<std::underflow_error>(ThrowStdUnderflowError);
-
-  ExpectThrowNoWhat<std::bad_function_call>(ThrowStdBadFunctionCall);
-  ExpectThrowNoWhat<std::bad_alloc>(ThrowStdBadAlloc);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/container/BUILD.bazel b/third_party/abseil/absl/container/BUILD.bazel
deleted file mode 100644
index f22fdc6..0000000
--- a/third_party/abseil/absl/container/BUILD.bazel
+++ /dev/null
@@ -1,976 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "compressed_tuple",
-    hdrs = ["internal/compressed_tuple.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "compressed_tuple_test",
-    srcs = ["internal/compressed_tuple_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":compressed_tuple",
-        ":test_instance_tracker",
-        "//absl/memory",
-        "//absl/types:any",
-        "//absl/types:optional",
-        "//absl/utility",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "fixed_array",
-    hdrs = ["fixed_array.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":compressed_tuple",
-        "//absl/algorithm",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:dynamic_annotations",
-        "//absl/base:throw_delegate",
-        "//absl/memory",
-    ],
-)
-
-cc_test(
-    name = "fixed_array_test",
-    srcs = ["fixed_array_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":counting_allocator",
-        ":fixed_array",
-        "//absl/base:config",
-        "//absl/base:exception_testing",
-        "//absl/hash:hash_testing",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "fixed_array_exception_safety_test",
-    srcs = ["fixed_array_exception_safety_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":fixed_array",
-        "//absl/base:config",
-        "//absl/base:exception_safety_testing",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "fixed_array_benchmark",
-    srcs = ["fixed_array_benchmark.cc"],
-    copts = ABSL_TEST_COPTS + ["$(STACK_FRAME_UNLIMITED)"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    deps = [
-        ":fixed_array",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "inlined_vector_internal",
-    hdrs = ["internal/inlined_vector.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":compressed_tuple",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/types:span",
-    ],
-)
-
-cc_library(
-    name = "inlined_vector",
-    hdrs = ["inlined_vector.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":inlined_vector_internal",
-        "//absl/algorithm",
-        "//absl/base:core_headers",
-        "//absl/base:throw_delegate",
-        "//absl/memory",
-    ],
-)
-
-cc_library(
-    name = "counting_allocator",
-    testonly = 1,
-    hdrs = ["internal/counting_allocator.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = ["//absl/base:config"],
-)
-
-cc_test(
-    name = "inlined_vector_test",
-    srcs = ["inlined_vector_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":counting_allocator",
-        ":inlined_vector",
-        ":test_instance_tracker",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:exception_testing",
-        "//absl/base:raw_logging_internal",
-        "//absl/hash:hash_testing",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "inlined_vector_benchmark",
-    srcs = ["inlined_vector_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    deps = [
-        ":inlined_vector",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "inlined_vector_exception_safety_test",
-    srcs = ["inlined_vector_exception_safety_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":inlined_vector",
-        "//absl/base:config",
-        "//absl/base:exception_safety_testing",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "test_instance_tracker",
-    testonly = 1,
-    srcs = ["internal/test_instance_tracker.cc"],
-    hdrs = ["internal/test_instance_tracker.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = ["//absl/types:compare"],
-)
-
-cc_test(
-    name = "test_instance_tracker_test",
-    srcs = ["internal/test_instance_tracker_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":test_instance_tracker",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-NOTEST_TAGS_NONMOBILE = [
-    "no_test_darwin_x86_64",
-    "no_test_loonix",
-]
-
-NOTEST_TAGS_MOBILE = [
-    "no_test_android_arm",
-    "no_test_android_arm64",
-    "no_test_android_x86",
-    "no_test_ios_x86_64",
-]
-
-NOTEST_TAGS = NOTEST_TAGS_MOBILE + NOTEST_TAGS_NONMOBILE
-
-cc_library(
-    name = "flat_hash_map",
-    hdrs = ["flat_hash_map.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":container_memory",
-        ":hash_function_defaults",
-        ":raw_hash_map",
-        "//absl/algorithm:container",
-        "//absl/memory",
-    ],
-)
-
-cc_test(
-    name = "flat_hash_map_test",
-    srcs = ["flat_hash_map_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":flat_hash_map",
-        ":hash_generator_testing",
-        ":unordered_map_constructor_test",
-        ":unordered_map_lookup_test",
-        ":unordered_map_members_test",
-        ":unordered_map_modifiers_test",
-        "//absl/base:raw_logging_internal",
-        "//absl/types:any",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "flat_hash_set",
-    hdrs = ["flat_hash_set.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":container_memory",
-        ":hash_function_defaults",
-        ":raw_hash_set",
-        "//absl/algorithm:container",
-        "//absl/base:core_headers",
-        "//absl/memory",
-    ],
-)
-
-cc_test(
-    name = "flat_hash_set_test",
-    srcs = ["flat_hash_set_test.cc"],
-    copts = ABSL_TEST_COPTS + ["-DUNORDERED_SET_CXX17"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":flat_hash_set",
-        ":hash_generator_testing",
-        ":unordered_set_constructor_test",
-        ":unordered_set_lookup_test",
-        ":unordered_set_members_test",
-        ":unordered_set_modifiers_test",
-        "//absl/base:raw_logging_internal",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "node_hash_map",
-    hdrs = ["node_hash_map.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":container_memory",
-        ":hash_function_defaults",
-        ":node_hash_policy",
-        ":raw_hash_map",
-        "//absl/algorithm:container",
-        "//absl/memory",
-    ],
-)
-
-cc_test(
-    name = "node_hash_map_test",
-    srcs = ["node_hash_map_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":hash_generator_testing",
-        ":node_hash_map",
-        ":tracked",
-        ":unordered_map_constructor_test",
-        ":unordered_map_lookup_test",
-        ":unordered_map_members_test",
-        ":unordered_map_modifiers_test",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "node_hash_set",
-    hdrs = ["node_hash_set.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_function_defaults",
-        ":node_hash_policy",
-        ":raw_hash_set",
-        "//absl/algorithm:container",
-        "//absl/memory",
-    ],
-)
-
-cc_test(
-    name = "node_hash_set_test",
-    srcs = ["node_hash_set_test.cc"],
-    copts = ABSL_TEST_COPTS + ["-DUNORDERED_SET_CXX17"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":node_hash_set",
-        ":unordered_set_constructor_test",
-        ":unordered_set_lookup_test",
-        ":unordered_set_members_test",
-        ":unordered_set_modifiers_test",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "container_memory",
-    hdrs = ["internal/container_memory.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "container_memory_test",
-    srcs = ["internal/container_memory_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":container_memory",
-        ":test_instance_tracker",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "hash_function_defaults",
-    hdrs = ["internal/hash_function_defaults.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/hash",
-        "//absl/strings",
-        "//absl/strings:cord",
-    ],
-)
-
-cc_test(
-    name = "hash_function_defaults_test",
-    srcs = ["internal/hash_function_defaults_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS,
-    deps = [
-        ":hash_function_defaults",
-        "//absl/hash",
-        "//absl/random",
-        "//absl/strings",
-        "//absl/strings:cord",
-        "//absl/strings:cord_test_helpers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "hash_generator_testing",
-    testonly = 1,
-    srcs = ["internal/hash_generator_testing.cc"],
-    hdrs = ["internal/hash_generator_testing.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_policy_testing",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-    ],
-)
-
-cc_library(
-    name = "hash_policy_testing",
-    testonly = 1,
-    hdrs = ["internal/hash_policy_testing.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/hash",
-        "//absl/strings",
-    ],
-)
-
-cc_test(
-    name = "hash_policy_testing_test",
-    srcs = ["internal/hash_policy_testing_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_policy_testing",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "hash_policy_traits",
-    hdrs = ["internal/hash_policy_traits.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/meta:type_traits"],
-)
-
-cc_test(
-    name = "hash_policy_traits_test",
-    srcs = ["internal/hash_policy_traits_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_policy_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "hashtable_debug",
-    hdrs = ["internal/hashtable_debug.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hashtable_debug_hooks",
-    ],
-)
-
-cc_library(
-    name = "hashtable_debug_hooks",
-    hdrs = ["internal/hashtable_debug_hooks.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-    ],
-)
-
-cc_library(
-    name = "hashtablez_sampler",
-    srcs = [
-        "internal/hashtablez_sampler.cc",
-        "internal/hashtablez_sampler_force_weak_definition.cc",
-    ],
-    hdrs = ["internal/hashtablez_sampler.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":have_sse",
-        "//absl/base",
-        "//absl/base:core_headers",
-        "//absl/base:exponential_biased",
-        "//absl/debugging:stacktrace",
-        "//absl/memory",
-        "//absl/synchronization",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "hashtablez_sampler_test",
-    srcs = ["internal/hashtablez_sampler_test.cc"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hashtablez_sampler",
-        ":have_sse",
-        "//absl/base:core_headers",
-        "//absl/synchronization",
-        "//absl/synchronization:thread_pool",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "node_hash_policy",
-    hdrs = ["internal/node_hash_policy.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/base:config"],
-)
-
-cc_test(
-    name = "node_hash_policy_test",
-    srcs = ["internal/node_hash_policy_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_policy_traits",
-        ":node_hash_policy",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "raw_hash_map",
-    hdrs = ["internal/raw_hash_map.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":container_memory",
-        ":raw_hash_set",
-        "//absl/base:throw_delegate",
-    ],
-)
-
-cc_library(
-    name = "have_sse",
-    hdrs = ["internal/have_sse.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-)
-
-cc_library(
-    name = "common",
-    hdrs = ["internal/common.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/meta:type_traits",
-        "//absl/types:optional",
-    ],
-)
-
-cc_library(
-    name = "raw_hash_set",
-    srcs = ["internal/raw_hash_set.cc"],
-    hdrs = ["internal/raw_hash_set.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":common",
-        ":compressed_tuple",
-        ":container_memory",
-        ":hash_policy_traits",
-        ":hashtable_debug_hooks",
-        ":hashtablez_sampler",
-        ":have_sse",
-        ":layout",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/numeric:bits",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "raw_hash_set_test",
-    srcs = ["internal/raw_hash_set_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkstatic = 1,
-    tags = NOTEST_TAGS,
-    deps = [
-        ":container_memory",
-        ":hash_function_defaults",
-        ":hash_policy_testing",
-        ":hashtable_debug",
-        ":raw_hash_set",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "raw_hash_set_benchmark",
-    testonly = 1,
-    srcs = ["internal/raw_hash_set_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":hash_function_defaults",
-        ":raw_hash_set",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings:str_format",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_binary(
-    name = "raw_hash_set_probe_benchmark",
-    testonly = 1,
-    srcs = ["internal/raw_hash_set_probe_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = select({
-        "//conditions:default": [],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":flat_hash_map",
-        ":hash_function_defaults",
-        ":hashtable_debug",
-        ":raw_hash_set",
-        "//absl/random",
-        "//absl/random:distributions",
-        "//absl/strings",
-        "//absl/strings:str_format",
-    ],
-)
-
-cc_test(
-    name = "raw_hash_set_allocator_test",
-    size = "small",
-    srcs = ["internal/raw_hash_set_allocator_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":raw_hash_set",
-        ":tracked",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "layout",
-    hdrs = ["internal/layout.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/types:span",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "layout_test",
-    size = "small",
-    srcs = ["internal/layout_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":layout",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/types:span",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "layout_benchmark",
-    testonly = 1,
-    srcs = ["internal/layout_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":layout",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "tracked",
-    testonly = 1,
-    hdrs = ["internal/tracked.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-    ],
-)
-
-cc_library(
-    name = "unordered_map_constructor_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_map_constructor_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_generator_testing",
-        ":hash_policy_testing",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_map_lookup_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_map_lookup_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_generator_testing",
-        ":hash_policy_testing",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_map_modifiers_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_map_modifiers_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_generator_testing",
-        ":hash_policy_testing",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_set_constructor_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_set_constructor_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_generator_testing",
-        ":hash_policy_testing",
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_set_members_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_set_members_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_map_members_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_map_members_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_set_lookup_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_set_lookup_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_generator_testing",
-        ":hash_policy_testing",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "unordered_set_modifiers_test",
-    testonly = 1,
-    hdrs = ["internal/unordered_set_modifiers_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash_generator_testing",
-        ":hash_policy_testing",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "unordered_set_test",
-    srcs = ["internal/unordered_set_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":unordered_set_constructor_test",
-        ":unordered_set_lookup_test",
-        ":unordered_set_members_test",
-        ":unordered_set_modifiers_test",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "unordered_map_test",
-    srcs = ["internal/unordered_map_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = NOTEST_TAGS_NONMOBILE,
-    deps = [
-        ":unordered_map_constructor_test",
-        ":unordered_map_lookup_test",
-        ":unordered_map_members_test",
-        ":unordered_map_modifiers_test",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "btree",
-    srcs = [
-        "internal/btree.h",
-        "internal/btree_container.h",
-    ],
-    hdrs = [
-        "btree_map.h",
-        "btree_set.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:public"],
-    deps = [
-        ":common",
-        ":compressed_tuple",
-        ":container_memory",
-        ":layout",
-        "//absl/base:core_headers",
-        "//absl/base:throw_delegate",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/strings:cord",
-        "//absl/types:compare",
-        "//absl/utility",
-    ],
-)
-
-cc_library(
-    name = "btree_test_common",
-    testonly = 1,
-    hdrs = ["btree_test.h"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":btree",
-        ":flat_hash_set",
-        "//absl/strings",
-        "//absl/strings:cord",
-        "//absl/time",
-    ],
-)
-
-cc_test(
-    name = "btree_test",
-    size = "large",
-    srcs = [
-        "btree_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    shard_count = 10,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":btree",
-        ":btree_test_common",
-        ":counting_allocator",
-        ":test_instance_tracker",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/flags:flag",
-        "//absl/hash:hash_testing",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/types:compare",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "btree_benchmark",
-    testonly = 1,
-    srcs = [
-        "btree_benchmark.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":btree",
-        ":btree_test_common",
-        ":flat_hash_map",
-        ":flat_hash_set",
-        ":hashtable_debug",
-        "//absl/base:raw_logging_internal",
-        "//absl/flags:flag",
-        "//absl/hash",
-        "//absl/memory",
-        "//absl/strings:cord",
-        "//absl/strings:str_format",
-        "//absl/time",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
diff --git a/third_party/abseil/absl/container/CMakeLists.txt b/third_party/abseil/absl/container/CMakeLists.txt
deleted file mode 100644
index eb202c4..0000000
--- a/third_party/abseil/absl/container/CMakeLists.txt
+++ /dev/null
@@ -1,905 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# This is deprecated and will be removed in the future.  It also doesn't do
-# anything anyways.  Prefer to use the library associated with the API you are
-# using.
-absl_cc_library(
-  NAME
-    container
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    btree
-  HDRS
-    "btree_map.h"
-    "btree_set.h"
-    "internal/btree.h"
-    "internal/btree_container.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::container_common
-    absl::compare
-    absl::compressed_tuple
-    absl::container_memory
-    absl::cord
-    absl::core_headers
-    absl::layout
-    absl::memory
-    absl::strings
-    absl::throw_delegate
-    absl::type_traits
-    absl::utility
-)
-
-absl_cc_library(
-  NAME
-    btree_test_common
-  hdrs
-    "btree_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::btree
-    absl::cord
-    absl::flat_hash_set
-    absl::strings
-    absl::time
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    btree_test
-  SRCS
-    "btree_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::btree
-    absl::btree_test_common
-    absl::compare
-    absl::core_headers
-    absl::counting_allocator
-    absl::flags
-    absl::hash_testing
-    absl::raw_logging_internal
-    absl::strings
-    absl::test_instance_tracker
-    absl::type_traits
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    compressed_tuple
-  HDRS
-    "internal/compressed_tuple.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    compressed_tuple_test
-  SRCS
-    "internal/compressed_tuple_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::any
-    absl::compressed_tuple
-    absl::memory
-    absl::optional
-    absl::test_instance_tracker
-    absl::utility
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    fixed_array
-  HDRS
-   "fixed_array.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::compressed_tuple
-    absl::algorithm
-    absl::config
-    absl::core_headers
-    absl::dynamic_annotations
-    absl::throw_delegate
-    absl::memory
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    fixed_array_test
-  SRCS
-    "fixed_array_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::fixed_array
-    absl::counting_allocator
-    absl::config
-    absl::exception_testing
-    absl::hash_testing
-    absl::memory
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    fixed_array_exception_safety_test
-  SRCS
-    "fixed_array_exception_safety_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::fixed_array
-    absl::config
-    absl::exception_safety_testing
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    inlined_vector_internal
-  HDRS
-   "internal/inlined_vector.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::compressed_tuple
-    absl::core_headers
-    absl::memory
-    absl::span
-    absl::type_traits
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    inlined_vector
-  HDRS
-   "inlined_vector.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::algorithm
-    absl::core_headers
-    absl::inlined_vector_internal
-    absl::throw_delegate
-    absl::memory
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    counting_allocator
-  HDRS
-    "internal/counting_allocator.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-)
-
-absl_cc_test(
-  NAME
-    inlined_vector_test
-  SRCS
-    "inlined_vector_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::counting_allocator
-    absl::inlined_vector
-    absl::test_instance_tracker
-    absl::config
-    absl::core_headers
-    absl::exception_testing
-    absl::hash_testing
-    absl::memory
-    absl::raw_logging_internal
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    inlined_vector_exception_safety_test
-  SRCS
-    "inlined_vector_exception_safety_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::inlined_vector
-    absl::config
-    absl::exception_safety_testing
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    test_instance_tracker
-  HDRS
-    "internal/test_instance_tracker.h"
-  SRCS
-    "internal/test_instance_tracker.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::compare
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    test_instance_tracker_test
-  SRCS
-    "internal/test_instance_tracker_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::test_instance_tracker
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    flat_hash_map
-  HDRS
-    "flat_hash_map.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::container_memory
-    absl::hash_function_defaults
-    absl::raw_hash_map
-    absl::algorithm_container
-    absl::memory
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    flat_hash_map_test
-  SRCS
-    "flat_hash_map_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flat_hash_map
-    absl::hash_generator_testing
-    absl::unordered_map_constructor_test
-    absl::unordered_map_lookup_test
-    absl::unordered_map_members_test
-    absl::unordered_map_modifiers_test
-    absl::any
-    absl::raw_logging_internal
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    flat_hash_set
-  HDRS
-    "flat_hash_set.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::container_memory
-    absl::hash_function_defaults
-    absl::raw_hash_set
-    absl::algorithm_container
-    absl::core_headers
-    absl::memory
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    flat_hash_set_test
-  SRCS
-    "flat_hash_set_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    "-DUNORDERED_SET_CXX17"
-  DEPS
-    absl::flat_hash_set
-    absl::hash_generator_testing
-    absl::unordered_set_constructor_test
-    absl::unordered_set_lookup_test
-    absl::unordered_set_members_test
-    absl::unordered_set_modifiers_test
-    absl::memory
-    absl::raw_logging_internal
-    absl::strings
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    node_hash_map
-  HDRS
-    "node_hash_map.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::container_memory
-    absl::hash_function_defaults
-    absl::node_hash_policy
-    absl::raw_hash_map
-    absl::algorithm_container
-    absl::memory
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    node_hash_map_test
-  SRCS
-    "node_hash_map_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::node_hash_map
-    absl::tracked
-    absl::unordered_map_constructor_test
-    absl::unordered_map_lookup_test
-    absl::unordered_map_members_test
-    absl::unordered_map_modifiers_test
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    node_hash_set
-  HDRS
-    "node_hash_set.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::hash_function_defaults
-    absl::node_hash_policy
-    absl::raw_hash_set
-    absl::algorithm_container
-    absl::memory
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    node_hash_set_test
-  SRCS
-    "node_hash_set_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    "-DUNORDERED_SET_CXX17"
-  DEPS
-    absl::hash_generator_testing
-    absl::node_hash_set
-    absl::unordered_set_constructor_test
-    absl::unordered_set_lookup_test
-    absl::unordered_set_members_test
-    absl::unordered_set_modifiers_test
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    container_memory
-  HDRS
-    "internal/container_memory.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::memory
-    absl::type_traits
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    container_memory_test
-  SRCS
-    "internal/container_memory_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::container_memory
-    absl::strings
-    absl::test_instance_tracker
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    hash_function_defaults
-  HDRS
-    "internal/hash_function_defaults.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::cord
-    absl::hash
-    absl::strings
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    hash_function_defaults_test
-  SRCS
-    "internal/hash_function_defaults_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::cord
-    absl::cord_test_helpers
-    absl::hash_function_defaults
-    absl::hash
-    absl::random_random
-    absl::strings
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    hash_generator_testing
-  HDRS
-    "internal/hash_generator_testing.h"
-  SRCS
-    "internal/hash_generator_testing.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_policy_testing
-    absl::memory
-    absl::meta
-    absl::strings
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    hash_policy_testing
-  HDRS
-    "internal/hash_policy_testing.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash
-    absl::strings
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    hash_policy_testing_test
-  SRCS
-    "internal/hash_policy_testing_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_policy_testing
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    hash_policy_traits
-  HDRS
-    "internal/hash_policy_traits.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::meta
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    hash_policy_traits_test
-  SRCS
-    "internal/hash_policy_traits_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_policy_traits
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    hashtablez_sampler
-  HDRS
-    "internal/hashtablez_sampler.h"
-  SRCS
-    "internal/hashtablez_sampler.cc"
-    "internal/hashtablez_sampler_force_weak_definition.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base
-    absl::exponential_biased
-    absl::have_sse
-    absl::synchronization
-)
-
-absl_cc_test(
-  NAME
-    hashtablez_sampler_test
-  SRCS
-    "internal/hashtablez_sampler_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hashtablez_sampler
-    absl::have_sse
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    hashtable_debug
-  HDRS
-    "internal/hashtable_debug.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::hashtable_debug_hooks
-)
-
-absl_cc_library(
-  NAME
-    hashtable_debug_hooks
-  HDRS
-    "internal/hashtable_debug_hooks.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    have_sse
-  HDRS
-    "internal/have_sse.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-absl_cc_library(
-  NAME
-    node_hash_policy
-  HDRS
-    "internal/node_hash_policy.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    node_hash_policy_test
-  SRCS
-    "internal/node_hash_policy_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_policy_traits
-    absl::node_hash_policy
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    raw_hash_map
-  HDRS
-    "internal/raw_hash_map.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::container_memory
-    absl::raw_hash_set
-    absl::throw_delegate
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    container_common
-  HDRS
-    "internal/common.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::type_traits
-)
-
-absl_cc_library(
-  NAME
-    raw_hash_set
-  HDRS
-    "internal/raw_hash_set.h"
-  SRCS
-    "internal/raw_hash_set.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bits
-    absl::compressed_tuple
-    absl::config
-    absl::container_common
-    absl::container_memory
-    absl::core_headers
-    absl::endian
-    absl::hash_policy_traits
-    absl::hashtable_debug_hooks
-    absl::have_sse
-    absl::layout
-    absl::memory
-    absl::meta
-    absl::optional
-    absl::utility
-    absl::hashtablez_sampler
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    raw_hash_set_test
-  SRCS
-    "internal/raw_hash_set_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::container_memory
-    absl::hash_function_defaults
-    absl::hash_policy_testing
-    absl::hashtable_debug
-    absl::raw_hash_set
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::raw_logging_internal
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    raw_hash_set_allocator_test
-  SRCS
-    "internal/raw_hash_set_allocator_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::raw_hash_set
-    absl::tracked
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    layout
-  HDRS
-    "internal/layout.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::meta
-    absl::strings
-    absl::span
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    layout_test
-  SRCS
-    "internal/layout_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::layout
-    absl::config
-    absl::core_headers
-    absl::raw_logging_internal
-    absl::span
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    tracked
-  HDRS
-    "internal/tracked.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::config
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_map_constructor_test
-  HDRS
-    "internal/unordered_map_constructor_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::hash_policy_testing
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_map_lookup_test
-  HDRS
-    "internal/unordered_map_lookup_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::hash_policy_testing
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_map_members_test
-  HDRS
-    "internal/unordered_map_members_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::type_traits
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_map_modifiers_test
-  HDRS
-    "internal/unordered_map_modifiers_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::hash_policy_testing
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_set_constructor_test
-  HDRS
-    "internal/unordered_set_constructor_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::hash_policy_testing
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_set_lookup_test
-  HDRS
-    "internal/unordered_set_lookup_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::hash_policy_testing
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_set_members_test
-  HDRS
-    "internal/unordered_set_members_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::type_traits
-    gmock
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    unordered_set_modifiers_test
-  HDRS
-    "internal/unordered_set_modifiers_test.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::hash_generator_testing
-    absl::hash_policy_testing
-    gmock
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    unordered_set_test
-  SRCS
-    "internal/unordered_set_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::unordered_set_constructor_test
-    absl::unordered_set_lookup_test
-    absl::unordered_set_members_test
-    absl::unordered_set_modifiers_test
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    unordered_map_test
-  SRCS
-    "internal/unordered_map_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::unordered_map_constructor_test
-    absl::unordered_map_lookup_test
-    absl::unordered_map_members_test
-    absl::unordered_map_modifiers_test
-    gmock_main
-)
diff --git a/third_party/abseil/absl/container/btree_benchmark.cc b/third_party/abseil/absl/container/btree_benchmark.cc
deleted file mode 100644
index 4679867..0000000
--- a/third_party/abseil/absl/container/btree_benchmark.cc
+++ /dev/null
@@ -1,735 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <functional>
-#include <map>
-#include <numeric>
-#include <random>
-#include <set>
-#include <string>
-#include <type_traits>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/btree_map.h"
-#include "absl/container/btree_set.h"
-#include "absl/container/btree_test.h"
-#include "absl/container/flat_hash_map.h"
-#include "absl/container/flat_hash_set.h"
-#include "absl/container/internal/hashtable_debug.h"
-#include "absl/flags/flag.h"
-#include "absl/hash/hash.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/str_format.h"
-#include "absl/time/time.h"
-#include "benchmark/benchmark.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-constexpr size_t kBenchmarkValues = 1 << 20;
-
-// How many times we add and remove sub-batches in one batch of *AddRem
-// benchmarks.
-constexpr size_t kAddRemBatchSize = 1 << 2;
-
-// Generates n values in the range [0, 4 * n].
-template <typename V>
-std::vector<V> GenerateValues(int n) {
-  constexpr int kSeed = 23;
-  return GenerateValuesWithSeed<V>(n, 4 * n, kSeed);
-}
-
-// Benchmark insertion of values into a container.
-template <typename T>
-void BM_InsertImpl(benchmark::State& state, bool sorted) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-
-  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
-  if (sorted) {
-    std::sort(values.begin(), values.end());
-  }
-  T container(values.begin(), values.end());
-
-  // Remove and re-insert 10% of the keys per batch.
-  const int batch_size = (kBenchmarkValues + 9) / 10;
-  while (state.KeepRunningBatch(batch_size)) {
-    state.PauseTiming();
-    const auto i = static_cast<int>(state.iterations());
-
-    for (int j = i; j < i + batch_size; j++) {
-      int x = j % kBenchmarkValues;
-      container.erase(key_of_value(values[x]));
-    }
-
-    state.ResumeTiming();
-
-    for (int j = i; j < i + batch_size; j++) {
-      int x = j % kBenchmarkValues;
-      container.insert(values[x]);
-    }
-  }
-}
-
-template <typename T>
-void BM_Insert(benchmark::State& state) {
-  BM_InsertImpl<T>(state, false);
-}
-
-template <typename T>
-void BM_InsertSorted(benchmark::State& state) {
-  BM_InsertImpl<T>(state, true);
-}
-
-// container::insert sometimes returns a pair<iterator, bool> and sometimes
-// returns an iterator (for multi- containers).
-template <typename Iter>
-Iter GetIterFromInsert(const std::pair<Iter, bool>& pair) {
-  return pair.first;
-}
-template <typename Iter>
-Iter GetIterFromInsert(const Iter iter) {
-  return iter;
-}
-
-// Benchmark insertion of values into a container at the end.
-template <typename T>
-void BM_InsertEnd(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-
-  T container;
-  const int kSize = 10000;
-  for (int i = 0; i < kSize; ++i) {
-    container.insert(Generator<V>(kSize)(i));
-  }
-  V v = Generator<V>(kSize)(kSize - 1);
-  typename T::key_type k = key_of_value(v);
-
-  auto it = container.find(k);
-  while (state.KeepRunning()) {
-    // Repeatedly removing then adding v.
-    container.erase(it);
-    it = GetIterFromInsert(container.insert(v));
-  }
-}
-
-// Benchmark inserting the first few elements in a container. In b-tree, this is
-// when the root node grows.
-template <typename T>
-void BM_InsertSmall(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-
-  const int kSize = 8;
-  std::vector<V> values = GenerateValues<V>(kSize);
-  T container;
-
-  while (state.KeepRunningBatch(kSize)) {
-    for (int i = 0; i < kSize; ++i) {
-      benchmark::DoNotOptimize(container.insert(values[i]));
-    }
-    state.PauseTiming();
-    // Do not measure the time it takes to clear the container.
-    container.clear();
-    state.ResumeTiming();
-  }
-}
-
-template <typename T>
-void BM_LookupImpl(benchmark::State& state, bool sorted) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-
-  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
-  if (sorted) {
-    std::sort(values.begin(), values.end());
-  }
-  T container(values.begin(), values.end());
-
-  while (state.KeepRunning()) {
-    int idx = state.iterations() % kBenchmarkValues;
-    benchmark::DoNotOptimize(container.find(key_of_value(values[idx])));
-  }
-}
-
-// Benchmark lookup of values in a container.
-template <typename T>
-void BM_Lookup(benchmark::State& state) {
-  BM_LookupImpl<T>(state, false);
-}
-
-// Benchmark lookup of values in a full container, meaning that values
-// are inserted in-order to take advantage of biased insertion, which
-// yields a full tree.
-template <typename T>
-void BM_FullLookup(benchmark::State& state) {
-  BM_LookupImpl<T>(state, true);
-}
-
-// Benchmark deletion of values from a container.
-template <typename T>
-void BM_Delete(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
-  T container(values.begin(), values.end());
-
-  // Remove and re-insert 10% of the keys per batch.
-  const int batch_size = (kBenchmarkValues + 9) / 10;
-  while (state.KeepRunningBatch(batch_size)) {
-    const int i = state.iterations();
-
-    for (int j = i; j < i + batch_size; j++) {
-      int x = j % kBenchmarkValues;
-      container.erase(key_of_value(values[x]));
-    }
-
-    state.PauseTiming();
-    for (int j = i; j < i + batch_size; j++) {
-      int x = j % kBenchmarkValues;
-      container.insert(values[x]);
-    }
-    state.ResumeTiming();
-  }
-}
-
-// Benchmark deletion of multiple values from a container.
-template <typename T>
-void BM_DeleteRange(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
-  T container(values.begin(), values.end());
-
-  // Remove and re-insert 10% of the keys per batch.
-  const int batch_size = (kBenchmarkValues + 9) / 10;
-  while (state.KeepRunningBatch(batch_size)) {
-    const int i = state.iterations();
-
-    const int start_index = i % kBenchmarkValues;
-
-    state.PauseTiming();
-    {
-      std::vector<V> removed;
-      removed.reserve(batch_size);
-      auto itr = container.find(key_of_value(values[start_index]));
-      auto start = itr;
-      for (int j = 0; j < batch_size; j++) {
-        if (itr == container.end()) {
-          state.ResumeTiming();
-          container.erase(start, itr);
-          state.PauseTiming();
-          itr = container.begin();
-          start = itr;
-        }
-        removed.push_back(*itr++);
-      }
-
-      state.ResumeTiming();
-      container.erase(start, itr);
-      state.PauseTiming();
-
-      container.insert(removed.begin(), removed.end());
-    }
-    state.ResumeTiming();
-  }
-}
-
-// Benchmark steady-state insert (into first half of range) and remove (from
-// second half of range), treating the container approximately like a queue with
-// log-time access for all elements. This benchmark does not test the case where
-// insertion and removal happen in the same region of the tree.  This benchmark
-// counts two value constructors.
-template <typename T>
-void BM_QueueAddRem(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-
-  ABSL_RAW_CHECK(kBenchmarkValues % 2 == 0, "for performance");
-
-  T container;
-
-  const size_t half = kBenchmarkValues / 2;
-  std::vector<int> remove_keys(half);
-  std::vector<int> add_keys(half);
-
-  // We want to do the exact same work repeatedly, and the benchmark can end
-  // after a different number of iterations depending on the speed of the
-  // individual run so we use a large batch size here and ensure that we do
-  // deterministic work every batch.
-  while (state.KeepRunningBatch(half * kAddRemBatchSize)) {
-    state.PauseTiming();
-
-    container.clear();
-
-    for (size_t i = 0; i < half; ++i) {
-      remove_keys[i] = i;
-      add_keys[i] = i;
-    }
-    constexpr int kSeed = 5;
-    std::mt19937_64 rand(kSeed);
-    std::shuffle(remove_keys.begin(), remove_keys.end(), rand);
-    std::shuffle(add_keys.begin(), add_keys.end(), rand);
-
-    // Note needs lazy generation of values.
-    Generator<V> g(kBenchmarkValues * kAddRemBatchSize);
-
-    for (size_t i = 0; i < half; ++i) {
-      container.insert(g(add_keys[i]));
-      container.insert(g(half + remove_keys[i]));
-    }
-
-    // There are three parts each of size "half":
-    // 1 is being deleted from  [offset - half, offset)
-    // 2 is standing            [offset, offset + half)
-    // 3 is being inserted into [offset + half, offset + 2 * half)
-    size_t offset = 0;
-
-    for (size_t i = 0; i < kAddRemBatchSize; ++i) {
-      std::shuffle(remove_keys.begin(), remove_keys.end(), rand);
-      std::shuffle(add_keys.begin(), add_keys.end(), rand);
-      offset += half;
-
-      state.ResumeTiming();
-      for (size_t idx = 0; idx < half; ++idx) {
-        container.erase(key_of_value(g(offset - half + remove_keys[idx])));
-        container.insert(g(offset + half + add_keys[idx]));
-      }
-      state.PauseTiming();
-    }
-    state.ResumeTiming();
-  }
-}
-
-// Mixed insertion and deletion in the same range using pre-constructed values.
-template <typename T>
-void BM_MixedAddRem(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-
-  ABSL_RAW_CHECK(kBenchmarkValues % 2 == 0, "for performance");
-
-  T container;
-
-  // Create two random shuffles
-  std::vector<int> remove_keys(kBenchmarkValues);
-  std::vector<int> add_keys(kBenchmarkValues);
-
-  // We want to do the exact same work repeatedly, and the benchmark can end
-  // after a different number of iterations depending on the speed of the
-  // individual run so we use a large batch size here and ensure that we do
-  // deterministic work every batch.
-  while (state.KeepRunningBatch(kBenchmarkValues * kAddRemBatchSize)) {
-    state.PauseTiming();
-
-    container.clear();
-
-    constexpr int kSeed = 7;
-    std::mt19937_64 rand(kSeed);
-
-    std::vector<V> values = GenerateValues<V>(kBenchmarkValues * 2);
-
-    // Insert the first half of the values (already in random order)
-    container.insert(values.begin(), values.begin() + kBenchmarkValues);
-
-    // Insert the first half of the values (already in random order)
-    for (size_t i = 0; i < kBenchmarkValues; ++i) {
-      // remove_keys and add_keys will be swapped before each round,
-      // therefore fill add_keys here w/ the keys being inserted, so
-      // they'll be the first to be removed.
-      remove_keys[i] = i + kBenchmarkValues;
-      add_keys[i] = i;
-    }
-
-    for (size_t i = 0; i < kAddRemBatchSize; ++i) {
-      remove_keys.swap(add_keys);
-      std::shuffle(remove_keys.begin(), remove_keys.end(), rand);
-      std::shuffle(add_keys.begin(), add_keys.end(), rand);
-
-      state.ResumeTiming();
-      for (size_t idx = 0; idx < kBenchmarkValues; ++idx) {
-        container.erase(key_of_value(values[remove_keys[idx]]));
-        container.insert(values[add_keys[idx]]);
-      }
-      state.PauseTiming();
-    }
-    state.ResumeTiming();
-  }
-}
-
-// Insertion at end, removal from the beginning.  This benchmark
-// counts two value constructors.
-// TODO(ezb): we could add a GenerateNext version of generator that could reduce
-// noise for string-like types.
-template <typename T>
-void BM_Fifo(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-
-  T container;
-  // Need lazy generation of values as state.max_iterations is large.
-  Generator<V> g(kBenchmarkValues + state.max_iterations);
-
-  for (int i = 0; i < kBenchmarkValues; i++) {
-    container.insert(g(i));
-  }
-
-  while (state.KeepRunning()) {
-    container.erase(container.begin());
-    container.insert(container.end(), g(state.iterations() + kBenchmarkValues));
-  }
-}
-
-// Iteration (forward) through the tree
-template <typename T>
-void BM_FwdIter(benchmark::State& state) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  using R = typename T::value_type const*;
-
-  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
-  T container(values.begin(), values.end());
-
-  auto iter = container.end();
-
-  R r = nullptr;
-
-  while (state.KeepRunning()) {
-    if (iter == container.end()) iter = container.begin();
-    r = &(*iter);
-    ++iter;
-  }
-
-  benchmark::DoNotOptimize(r);
-}
-
-// Benchmark random range-construction of a container.
-template <typename T>
-void BM_RangeConstructionImpl(benchmark::State& state, bool sorted) {
-  using V = typename remove_pair_const<typename T::value_type>::type;
-
-  std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
-  if (sorted) {
-    std::sort(values.begin(), values.end());
-  }
-  {
-    T container(values.begin(), values.end());
-  }
-
-  while (state.KeepRunning()) {
-    T container(values.begin(), values.end());
-    benchmark::DoNotOptimize(container);
-  }
-}
-
-template <typename T>
-void BM_InsertRangeRandom(benchmark::State& state) {
-  BM_RangeConstructionImpl<T>(state, false);
-}
-
-template <typename T>
-void BM_InsertRangeSorted(benchmark::State& state) {
-  BM_RangeConstructionImpl<T>(state, true);
-}
-
-#define STL_ORDERED_TYPES(value)                     \
-  using stl_set_##value = std::set<value>;           \
-  using stl_map_##value = std::map<value, intptr_t>; \
-  using stl_multiset_##value = std::multiset<value>; \
-  using stl_multimap_##value = std::multimap<value, intptr_t>
-
-using StdString = std::string;
-STL_ORDERED_TYPES(int32_t);
-STL_ORDERED_TYPES(int64_t);
-STL_ORDERED_TYPES(StdString);
-STL_ORDERED_TYPES(Cord);
-STL_ORDERED_TYPES(Time);
-
-#define STL_UNORDERED_TYPES(value)                                       \
-  using stl_unordered_set_##value = std::unordered_set<value>;           \
-  using stl_unordered_map_##value = std::unordered_map<value, intptr_t>; \
-  using flat_hash_set_##value = flat_hash_set<value>;                    \
-  using flat_hash_map_##value = flat_hash_map<value, intptr_t>;          \
-  using stl_unordered_multiset_##value = std::unordered_multiset<value>; \
-  using stl_unordered_multimap_##value =                                 \
-      std::unordered_multimap<value, intptr_t>
-
-#define STL_UNORDERED_TYPES_CUSTOM_HASH(value, hash)                           \
-  using stl_unordered_set_##value = std::unordered_set<value, hash>;           \
-  using stl_unordered_map_##value = std::unordered_map<value, intptr_t, hash>; \
-  using flat_hash_set_##value = flat_hash_set<value, hash>;                    \
-  using flat_hash_map_##value = flat_hash_map<value, intptr_t, hash>;          \
-  using stl_unordered_multiset_##value = std::unordered_multiset<value, hash>; \
-  using stl_unordered_multimap_##value =                                       \
-      std::unordered_multimap<value, intptr_t, hash>
-
-STL_UNORDERED_TYPES_CUSTOM_HASH(Cord, absl::Hash<absl::Cord>);
-
-STL_UNORDERED_TYPES(int32_t);
-STL_UNORDERED_TYPES(int64_t);
-STL_UNORDERED_TYPES(StdString);
-STL_UNORDERED_TYPES_CUSTOM_HASH(Time, absl::Hash<absl::Time>);
-
-#define BTREE_TYPES(value)                                            \
-  using btree_256_set_##value =                                       \
-      btree_set<value, std::less<value>, std::allocator<value>>;      \
-  using btree_256_map_##value =                                       \
-      btree_map<value, intptr_t, std::less<value>,                    \
-                std::allocator<std::pair<const value, intptr_t>>>;    \
-  using btree_256_multiset_##value =                                  \
-      btree_multiset<value, std::less<value>, std::allocator<value>>; \
-  using btree_256_multimap_##value =                                  \
-      btree_multimap<value, intptr_t, std::less<value>,               \
-                     std::allocator<std::pair<const value, intptr_t>>>
-
-BTREE_TYPES(int32_t);
-BTREE_TYPES(int64_t);
-BTREE_TYPES(StdString);
-BTREE_TYPES(Cord);
-BTREE_TYPES(Time);
-
-#define MY_BENCHMARK4(type, func)                                              \
-  void BM_##type##_##func(benchmark::State& state) { BM_##func<type>(state); } \
-  BENCHMARK(BM_##type##_##func)
-
-#define MY_BENCHMARK3(type)               \
-  MY_BENCHMARK4(type, Insert);            \
-  MY_BENCHMARK4(type, InsertSorted);      \
-  MY_BENCHMARK4(type, InsertEnd);         \
-  MY_BENCHMARK4(type, InsertSmall);       \
-  MY_BENCHMARK4(type, Lookup);            \
-  MY_BENCHMARK4(type, FullLookup);        \
-  MY_BENCHMARK4(type, Delete);            \
-  MY_BENCHMARK4(type, DeleteRange);       \
-  MY_BENCHMARK4(type, QueueAddRem);       \
-  MY_BENCHMARK4(type, MixedAddRem);       \
-  MY_BENCHMARK4(type, Fifo);              \
-  MY_BENCHMARK4(type, FwdIter);           \
-  MY_BENCHMARK4(type, InsertRangeRandom); \
-  MY_BENCHMARK4(type, InsertRangeSorted)
-
-#define MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(type) \
-  MY_BENCHMARK3(stl_##type);                    \
-  MY_BENCHMARK3(stl_unordered_##type);          \
-  MY_BENCHMARK3(btree_256_##type)
-
-#define MY_BENCHMARK2(type)                \
-  MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(type); \
-  MY_BENCHMARK3(flat_hash_##type)
-
-// Define MULTI_TESTING to see benchmarks for multi-containers also.
-//
-// You can use --copt=-DMULTI_TESTING.
-#ifdef MULTI_TESTING
-#define MY_BENCHMARK(type)                            \
-  MY_BENCHMARK2(set_##type);                          \
-  MY_BENCHMARK2(map_##type);                          \
-  MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(multiset_##type); \
-  MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(multimap_##type)
-#else
-#define MY_BENCHMARK(type)   \
-  MY_BENCHMARK2(set_##type); \
-  MY_BENCHMARK2(map_##type)
-#endif
-
-MY_BENCHMARK(int32_t);
-MY_BENCHMARK(int64_t);
-MY_BENCHMARK(StdString);
-MY_BENCHMARK(Cord);
-MY_BENCHMARK(Time);
-
-// Define a type whose size and cost of moving are independently customizable.
-// When sizeof(value_type) increases, we expect btree to no longer have as much
-// cache-locality advantage over STL. When cost of moving increases, we expect
-// btree to actually do more work than STL because it has to move values around
-// and STL doesn't have to.
-template <int Size, int Copies>
-struct BigType {
-  BigType() : BigType(0) {}
-  explicit BigType(int x) { std::iota(values.begin(), values.end(), x); }
-
-  void Copy(const BigType& other) {
-    for (int i = 0; i < Size && i < Copies; ++i) values[i] = other.values[i];
-    // If Copies > Size, do extra copies.
-    for (int i = Size, idx = 0; i < Copies; ++i) {
-      int64_t tmp = other.values[idx];
-      benchmark::DoNotOptimize(tmp);
-      idx = idx + 1 == Size ? 0 : idx + 1;
-    }
-  }
-
-  BigType(const BigType& other) { Copy(other); }
-  BigType& operator=(const BigType& other) {
-    Copy(other);
-    return *this;
-  }
-
-  // Compare only the first Copies elements if Copies is less than Size.
-  bool operator<(const BigType& other) const {
-    return std::lexicographical_compare(
-        values.begin(), values.begin() + std::min(Size, Copies),
-        other.values.begin(), other.values.begin() + std::min(Size, Copies));
-  }
-  bool operator==(const BigType& other) const {
-    return std::equal(values.begin(), values.begin() + std::min(Size, Copies),
-                      other.values.begin());
-  }
-
-  // Support absl::Hash.
-  template <typename State>
-  friend State AbslHashValue(State h, const BigType& b) {
-    for (int i = 0; i < Size && i < Copies; ++i)
-      h = State::combine(std::move(h), b.values[i]);
-    return h;
-  }
-
-  std::array<int64_t, Size> values;
-};
-
-#define BIG_TYPE_BENCHMARKS(SIZE, COPIES)                                     \
-  using stl_set_size##SIZE##copies##COPIES = std::set<BigType<SIZE, COPIES>>; \
-  using stl_map_size##SIZE##copies##COPIES =                                  \
-      std::map<BigType<SIZE, COPIES>, intptr_t>;                              \
-  using stl_multiset_size##SIZE##copies##COPIES =                             \
-      std::multiset<BigType<SIZE, COPIES>>;                                   \
-  using stl_multimap_size##SIZE##copies##COPIES =                             \
-      std::multimap<BigType<SIZE, COPIES>, intptr_t>;                         \
-  using stl_unordered_set_size##SIZE##copies##COPIES =                        \
-      std::unordered_set<BigType<SIZE, COPIES>,                               \
-                         absl::Hash<BigType<SIZE, COPIES>>>;                  \
-  using stl_unordered_map_size##SIZE##copies##COPIES =                        \
-      std::unordered_map<BigType<SIZE, COPIES>, intptr_t,                     \
-                         absl::Hash<BigType<SIZE, COPIES>>>;                  \
-  using flat_hash_set_size##SIZE##copies##COPIES =                            \
-      flat_hash_set<BigType<SIZE, COPIES>>;                                   \
-  using flat_hash_map_size##SIZE##copies##COPIES =                            \
-      flat_hash_map<BigType<SIZE, COPIES>, intptr_t>;                         \
-  using stl_unordered_multiset_size##SIZE##copies##COPIES =                   \
-      std::unordered_multiset<BigType<SIZE, COPIES>,                          \
-                              absl::Hash<BigType<SIZE, COPIES>>>;             \
-  using stl_unordered_multimap_size##SIZE##copies##COPIES =                   \
-      std::unordered_multimap<BigType<SIZE, COPIES>, intptr_t,                \
-                              absl::Hash<BigType<SIZE, COPIES>>>;             \
-  using btree_256_set_size##SIZE##copies##COPIES =                            \
-      btree_set<BigType<SIZE, COPIES>>;                                       \
-  using btree_256_map_size##SIZE##copies##COPIES =                            \
-      btree_map<BigType<SIZE, COPIES>, intptr_t>;                             \
-  using btree_256_multiset_size##SIZE##copies##COPIES =                       \
-      btree_multiset<BigType<SIZE, COPIES>>;                                  \
-  using btree_256_multimap_size##SIZE##copies##COPIES =                       \
-      btree_multimap<BigType<SIZE, COPIES>, intptr_t>;                        \
-  MY_BENCHMARK(size##SIZE##copies##COPIES)
-
-// Define BIG_TYPE_TESTING to see benchmarks for more big types.
-//
-// You can use --copt=-DBIG_TYPE_TESTING.
-#ifndef NODESIZE_TESTING
-#ifdef BIG_TYPE_TESTING
-BIG_TYPE_BENCHMARKS(1, 4);
-BIG_TYPE_BENCHMARKS(4, 1);
-BIG_TYPE_BENCHMARKS(4, 4);
-BIG_TYPE_BENCHMARKS(1, 8);
-BIG_TYPE_BENCHMARKS(8, 1);
-BIG_TYPE_BENCHMARKS(8, 8);
-BIG_TYPE_BENCHMARKS(1, 16);
-BIG_TYPE_BENCHMARKS(16, 1);
-BIG_TYPE_BENCHMARKS(16, 16);
-BIG_TYPE_BENCHMARKS(1, 32);
-BIG_TYPE_BENCHMARKS(32, 1);
-BIG_TYPE_BENCHMARKS(32, 32);
-#else
-BIG_TYPE_BENCHMARKS(32, 32);
-#endif
-#endif
-
-// Benchmark using unique_ptrs to large value types. In order to be able to use
-// the same benchmark code as the other types, use a type that holds a
-// unique_ptr and has a copy constructor.
-template <int Size>
-struct BigTypePtr {
-  BigTypePtr() : BigTypePtr(0) {}
-  explicit BigTypePtr(int x) {
-    ptr = absl::make_unique<BigType<Size, Size>>(x);
-  }
-  BigTypePtr(const BigTypePtr& other) {
-    ptr = absl::make_unique<BigType<Size, Size>>(*other.ptr);
-  }
-  BigTypePtr(BigTypePtr&& other) noexcept = default;
-  BigTypePtr& operator=(const BigTypePtr& other) {
-    ptr = absl::make_unique<BigType<Size, Size>>(*other.ptr);
-  }
-  BigTypePtr& operator=(BigTypePtr&& other) noexcept = default;
-
-  bool operator<(const BigTypePtr& other) const { return *ptr < *other.ptr; }
-  bool operator==(const BigTypePtr& other) const { return *ptr == *other.ptr; }
-
-  std::unique_ptr<BigType<Size, Size>> ptr;
-};
-
-template <int Size>
-double ContainerInfo(const btree_set<BigTypePtr<Size>>& b) {
-  const double bytes_used =
-      b.bytes_used() + b.size() * sizeof(BigType<Size, Size>);
-  const double bytes_per_value = bytes_used / b.size();
-  BtreeContainerInfoLog(b, bytes_used, bytes_per_value);
-  return bytes_per_value;
-}
-template <int Size>
-double ContainerInfo(const btree_map<int, BigTypePtr<Size>>& b) {
-  const double bytes_used =
-      b.bytes_used() + b.size() * sizeof(BigType<Size, Size>);
-  const double bytes_per_value = bytes_used / b.size();
-  BtreeContainerInfoLog(b, bytes_used, bytes_per_value);
-  return bytes_per_value;
-}
-
-#define BIG_TYPE_PTR_BENCHMARKS(SIZE)                                          \
-  using stl_set_size##SIZE##copies##SIZE##ptr = std::set<BigType<SIZE, SIZE>>; \
-  using stl_map_size##SIZE##copies##SIZE##ptr =                                \
-      std::map<int, BigType<SIZE, SIZE>>;                                      \
-  using stl_unordered_set_size##SIZE##copies##SIZE##ptr =                      \
-      std::unordered_set<BigType<SIZE, SIZE>,                                  \
-                         absl::Hash<BigType<SIZE, SIZE>>>;                     \
-  using stl_unordered_map_size##SIZE##copies##SIZE##ptr =                      \
-      std::unordered_map<int, BigType<SIZE, SIZE>>;                            \
-  using flat_hash_set_size##SIZE##copies##SIZE##ptr =                          \
-      flat_hash_set<BigType<SIZE, SIZE>>;                                      \
-  using flat_hash_map_size##SIZE##copies##SIZE##ptr =                          \
-      flat_hash_map<int, BigTypePtr<SIZE>>;                                    \
-  using btree_256_set_size##SIZE##copies##SIZE##ptr =                          \
-      btree_set<BigTypePtr<SIZE>>;                                             \
-  using btree_256_map_size##SIZE##copies##SIZE##ptr =                          \
-      btree_map<int, BigTypePtr<SIZE>>;                                        \
-  MY_BENCHMARK3(stl_set_size##SIZE##copies##SIZE##ptr);                        \
-  MY_BENCHMARK3(stl_unordered_set_size##SIZE##copies##SIZE##ptr);              \
-  MY_BENCHMARK3(flat_hash_set_size##SIZE##copies##SIZE##ptr);                  \
-  MY_BENCHMARK3(btree_256_set_size##SIZE##copies##SIZE##ptr);                  \
-  MY_BENCHMARK3(stl_map_size##SIZE##copies##SIZE##ptr);                        \
-  MY_BENCHMARK3(stl_unordered_map_size##SIZE##copies##SIZE##ptr);              \
-  MY_BENCHMARK3(flat_hash_map_size##SIZE##copies##SIZE##ptr);                  \
-  MY_BENCHMARK3(btree_256_map_size##SIZE##copies##SIZE##ptr)
-
-BIG_TYPE_PTR_BENCHMARKS(32);
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/btree_map.h b/third_party/abseil/absl/container/btree_map.h
deleted file mode 100644
index abc09b0..0000000
--- a/third_party/abseil/absl/container/btree_map.h
+++ /dev/null
@@ -1,769 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: btree_map.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines B-tree maps: sorted associative containers mapping
-// keys to values.
-//
-//     * `absl::btree_map<>`
-//     * `absl::btree_multimap<>`
-//
-// These B-tree types are similar to the corresponding types in the STL
-// (`std::map` and `std::multimap`) and generally conform to the STL interfaces
-// of those types. However, because they are implemented using B-trees, they
-// are more efficient in most situations.
-//
-// Unlike `std::map` and `std::multimap`, which are commonly implemented using
-// red-black tree nodes, B-tree maps use more generic B-tree nodes able to hold
-// multiple values per node. Holding multiple values per node often makes
-// B-tree maps perform better than their `std::map` counterparts, because
-// multiple entries can be checked within the same cache hit.
-//
-// However, these types should not be considered drop-in replacements for
-// `std::map` and `std::multimap` as there are some API differences, which are
-// noted in this header file.
-//
-// Importantly, insertions and deletions may invalidate outstanding iterators,
-// pointers, and references to elements. Such invalidations are typically only
-// an issue if insertion and deletion operations are interleaved with the use of
-// more than one iterator, pointer, or reference simultaneously. For this
-// reason, `insert()` and `erase()` return a valid iterator at the current
-// position.
-
-#ifndef ABSL_CONTAINER_BTREE_MAP_H_
-#define ABSL_CONTAINER_BTREE_MAP_H_
-
-#include "absl/container/internal/btree.h"  // IWYU pragma: export
-#include "absl/container/internal/btree_container.h"  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::btree_map<>
-//
-// An `absl::btree_map<K, V>` is an ordered associative container of
-// unique keys and associated values designed to be a more efficient replacement
-// for `std::map` (in most cases).
-//
-// Keys are sorted using an (optional) comparison function, which defaults to
-// `std::less<K>`.
-//
-// An `absl::btree_map<K, V>` uses a default allocator of
-// `std::allocator<std::pair<const K, V>>` to allocate (and deallocate)
-// nodes, and construct and destruct values within those nodes. You may
-// instead specify a custom allocator `A` (which in turn requires specifying a
-// custom comparator `C`) as in `absl::btree_map<K, V, C, A>`.
-//
-template <typename Key, typename Value, typename Compare = std::less<Key>,
-          typename Alloc = std::allocator<std::pair<const Key, Value>>>
-class btree_map
-    : public container_internal::btree_map_container<
-          container_internal::btree<container_internal::map_params<
-              Key, Value, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/false>>> {
-  using Base = typename btree_map::btree_map_container;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A `btree_map` supports the same overload set as `std::map`
-  // for construction and assignment:
-  //
-  // * Default constructor
-  //
-  //   absl::btree_map<int, std::string> map1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::btree_map<int, std::string> map2 =
-  //       {{1, "huey"}, {2, "dewey"}, {3, "louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::btree_map<int, std::string> map3(map2);
-  //
-  // * Copy assignment operator
-  //
-  //  absl::btree_map<int, std::string> map4;
-  //  map4 = map3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::btree_map<int, std::string> map5(std::move(map4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::btree_map<int, std::string> map6;
-  //   map6 = std::move(map5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::pair<int, std::string>> v = {{1, "a"}, {2, "b"}};
-  //   absl::btree_map<int, std::string> map7(v.begin(), v.end());
-  btree_map() {}
-  using Base::Base;
-
-  // btree_map::begin()
-  //
-  // Returns an iterator to the beginning of the `btree_map`.
-  using Base::begin;
-
-  // btree_map::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `btree_map`.
-  using Base::cbegin;
-
-  // btree_map::end()
-  //
-  // Returns an iterator to the end of the `btree_map`.
-  using Base::end;
-
-  // btree_map::cend()
-  //
-  // Returns a const iterator to the end of the `btree_map`.
-  using Base::cend;
-
-  // btree_map::empty()
-  //
-  // Returns whether or not the `btree_map` is empty.
-  using Base::empty;
-
-  // btree_map::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `btree_map` under current memory constraints. This value can be thought
-  // of as the largest value of `std::distance(begin(), end())` for a
-  // `btree_map<Key, T>`.
-  using Base::max_size;
-
-  // btree_map::size()
-  //
-  // Returns the number of elements currently within the `btree_map`.
-  using Base::size;
-
-  // btree_map::clear()
-  //
-  // Removes all elements from the `btree_map`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  using Base::clear;
-
-  // btree_map::erase()
-  //
-  // Erases elements within the `btree_map`. If an erase occurs, any references,
-  // pointers, or iterators are invalidated.
-  // Overloads are listed below.
-  //
-  // iterator erase(iterator position):
-  // iterator erase(const_iterator position):
-  //
-  //   Erases the element at `position` of the `btree_map`, returning
-  //   the iterator pointing to the element after the one that was erased
-  //   (or end() if none exists).
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning
-  //   the iterator pointing to the element after the interval that was erased
-  //   (or end() if none exists).
-  //
-  // template <typename K> size_type erase(const K& key):
-  //
-  //   Erases the element with the matching key, if it exists, returning the
-  //   number of elements erased (0 or 1).
-  using Base::erase;
-
-  // btree_map::insert()
-  //
-  // Inserts an element of the specified value into the `btree_map`,
-  // returning an iterator pointing to the newly inserted element, provided that
-  // an element with the given key does not already exist. If an insertion
-  // occurs, any references, pointers, or iterators are invalidated.
-  // Overloads are listed below.
-  //
-  // std::pair<iterator,bool> insert(const value_type& value):
-  //
-  //   Inserts a value into the `btree_map`. Returns a pair consisting of an
-  //   iterator to the inserted element (or to the element that prevented the
-  //   insertion) and a bool denoting whether the insertion took place.
-  //
-  // std::pair<iterator,bool> insert(value_type&& value):
-  //
-  //   Inserts a moveable value into the `btree_map`. Returns a pair
-  //   consisting of an iterator to the inserted element (or to the element that
-  //   prevented the insertion) and a bool denoting whether the insertion took
-  //   place.
-  //
-  // iterator insert(const_iterator hint, const value_type& value):
-  // iterator insert(const_iterator hint, value_type&& value):
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element, or to the existing element that prevented the
-  //   insertion.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  // void insert(std::initializer_list<init_type> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  using Base::insert;
-
-  // btree_map::insert_or_assign()
-  //
-  // Inserts an element of the specified value into the `btree_map` provided
-  // that a value with the given key does not already exist, or replaces the
-  // corresponding mapped type with the forwarded `obj` argument if a key for
-  // that value already exists, returning an iterator pointing to the newly
-  // inserted element. Overloads are listed below.
-  //
-  // pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj):
-  // pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj):
-  //
-  //   Inserts/Assigns (or moves) the element of the specified key into the
-  //   `btree_map`. If the returned bool is true, insertion took place, and if
-  //   it's false, assignment took place.
-  //
-  // iterator insert_or_assign(const_iterator hint,
-  //                           const key_type& k, M&& obj):
-  // iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj):
-  //
-  //   Inserts/Assigns (or moves) the element of the specified key into the
-  //   `btree_map` using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search.
-  using Base::insert_or_assign;
-
-  // btree_map::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_map`, provided that no element with the given key
-  // already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately. Prefer `try_emplace()` unless your key is not
-  // copyable or moveable.
-  //
-  // If an insertion occurs, any references, pointers, or iterators are
-  // invalidated.
-  using Base::emplace;
-
-  // btree_map::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_map`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search, and only inserts
-  // provided that no element with the given key already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately. Prefer `try_emplace()` unless your key is not
-  // copyable or moveable.
-  //
-  // If an insertion occurs, any references, pointers, or iterators are
-  // invalidated.
-  using Base::emplace_hint;
-
-  // btree_map::try_emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_map`, provided that no element with the given key
-  // already exists. Unlike `emplace()`, if an element with the given key
-  // already exists, we guarantee that no element is constructed.
-  //
-  // If an insertion occurs, any references, pointers, or iterators are
-  // invalidated.
-  //
-  // Overloads are listed below.
-  //
-  //   std::pair<iterator, bool> try_emplace(const key_type& k, Args&&... args):
-  //   std::pair<iterator, bool> try_emplace(key_type&& k, Args&&... args):
-  //
-  // Inserts (via copy or move) the element of the specified key into the
-  // `btree_map`.
-  //
-  //   iterator try_emplace(const_iterator hint,
-  //                        const key_type& k, Args&&... args):
-  //   iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args):
-  //
-  // Inserts (via copy or move) the element of the specified key into the
-  // `btree_map` using the position of `hint` as a non-binding suggestion
-  // for where to begin the insertion search.
-  using Base::try_emplace;
-
-  // btree_map::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the element at the indicated position and returns a node handle
-  //   owning that extracted data.
-  //
-  // template <typename K> node_type extract(const K& k):
-  //
-  //   Extracts the element with the key matching the passed key value and
-  //   returns a node handle owning that extracted data. If the `btree_map`
-  //   does not contain an element with a matching key, this function returns an
-  //   empty node handle.
-  //
-  // NOTE: when compiled in an earlier version of C++ than C++17,
-  // `node_type::key()` returns a const reference to the key instead of a
-  // mutable reference. We cannot safely return a mutable reference without
-  // std::launder (which is not available before C++17).
-  //
-  // NOTE: In this context, `node_type` refers to the C++17 concept of a
-  // move-only type that owns and provides access to the elements in associative
-  // containers (https://en.cppreference.com/w/cpp/container/node_handle).
-  // It does NOT refer to the data layout of the underlying btree.
-  using Base::extract;
-
-  // btree_map::merge()
-  //
-  // Extracts elements from a given `source` btree_map into this
-  // `btree_map`. If the destination `btree_map` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // btree_map::swap(btree_map& other)
-  //
-  // Exchanges the contents of this `btree_map` with those of the `other`
-  // btree_map, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
-  //
-  // All iterators and references on the `btree_map` remain valid, excepting
-  // for the past-the-end iterator, which is invalidated.
-  using Base::swap;
-
-  // btree_map::at()
-  //
-  // Returns a reference to the mapped value of the element with key equivalent
-  // to the passed key.
-  using Base::at;
-
-  // btree_map::contains()
-  //
-  // template <typename K> bool contains(const K& key) const:
-  //
-  // Determines whether an element comparing equal to the given `key` exists
-  // within the `btree_map`, returning `true` if so or `false` otherwise.
-  //
-  // Supports heterogeneous lookup, provided that the map is provided a
-  // compatible heterogeneous comparator.
-  using Base::contains;
-
-  // btree_map::count()
-  //
-  // template <typename K> size_type count(const K& key) const:
-  //
-  // Returns the number of elements comparing equal to the given `key` within
-  // the `btree_map`. Note that this function will return either `1` or `0`
-  // since duplicate elements are not allowed within a `btree_map`.
-  //
-  // Supports heterogeneous lookup, provided that the map is provided a
-  // compatible heterogeneous comparator.
-  using Base::count;
-
-  // btree_map::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `btree_map`.
-  using Base::equal_range;
-
-  // btree_map::find()
-  //
-  // template <typename K> iterator find(const K& key):
-  // template <typename K> const_iterator find(const K& key) const:
-  //
-  // Finds an element with the passed `key` within the `btree_map`.
-  //
-  // Supports heterogeneous lookup, provided that the map is provided a
-  // compatible heterogeneous comparator.
-  using Base::find;
-
-  // btree_map::operator[]()
-  //
-  // Returns a reference to the value mapped to the passed key within the
-  // `btree_map`, performing an `insert()` if the key does not already
-  // exist.
-  //
-  // If an insertion occurs, any references, pointers, or iterators are
-  // invalidated. Otherwise iterators are not affected and references are not
-  // invalidated. Overloads are listed below.
-  //
-  // T& operator[](key_type&& key):
-  // T& operator[](const key_type& key):
-  //
-  //   Inserts a value_type object constructed in-place if the element with the
-  //   given key does not exist.
-  using Base::operator[];
-
-  // btree_map::get_allocator()
-  //
-  // Returns the allocator function associated with this `btree_map`.
-  using Base::get_allocator;
-
-  // btree_map::key_comp();
-  //
-  // Returns the key comparator associated with this `btree_map`.
-  using Base::key_comp;
-
-  // btree_map::value_comp();
-  //
-  // Returns the value comparator associated with this `btree_map`.
-  using Base::value_comp;
-};
-
-// absl::swap(absl::btree_map<>, absl::btree_map<>)
-//
-// Swaps the contents of two `absl::btree_map` containers.
-template <typename K, typename V, typename C, typename A>
-void swap(btree_map<K, V, C, A> &x, btree_map<K, V, C, A> &y) {
-  return x.swap(y);
-}
-
-// absl::erase_if(absl::btree_map<>, Pred)
-//
-// Erases all elements that satisfy the predicate pred from the container.
-template <typename K, typename V, typename C, typename A, typename Pred>
-void erase_if(btree_map<K, V, C, A> &map, Pred pred) {
-  for (auto it = map.begin(); it != map.end();) {
-    if (pred(*it)) {
-      it = map.erase(it);
-    } else {
-      ++it;
-    }
-  }
-}
-
-// absl::btree_multimap
-//
-// An `absl::btree_multimap<K, V>` is an ordered associative container of
-// keys and associated values designed to be a more efficient replacement for
-// `std::multimap` (in most cases). Unlike `absl::btree_map`, a B-tree multimap
-// allows multiple elements with equivalent keys.
-//
-// Keys are sorted using an (optional) comparison function, which defaults to
-// `std::less<K>`.
-//
-// An `absl::btree_multimap<K, V>` uses a default allocator of
-// `std::allocator<std::pair<const K, V>>` to allocate (and deallocate)
-// nodes, and construct and destruct values within those nodes. You may
-// instead specify a custom allocator `A` (which in turn requires specifying a
-// custom comparator `C`) as in `absl::btree_multimap<K, V, C, A>`.
-//
-template <typename Key, typename Value, typename Compare = std::less<Key>,
-          typename Alloc = std::allocator<std::pair<const Key, Value>>>
-class btree_multimap
-    : public container_internal::btree_multimap_container<
-          container_internal::btree<container_internal::map_params<
-              Key, Value, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/true>>> {
-  using Base = typename btree_multimap::btree_multimap_container;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A `btree_multimap` supports the same overload set as `std::multimap`
-  // for construction and assignment:
-  //
-  // * Default constructor
-  //
-  //   absl::btree_multimap<int, std::string> map1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::btree_multimap<int, std::string> map2 =
-  //       {{1, "huey"}, {2, "dewey"}, {3, "louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::btree_multimap<int, std::string> map3(map2);
-  //
-  // * Copy assignment operator
-  //
-  //  absl::btree_multimap<int, std::string> map4;
-  //  map4 = map3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::btree_multimap<int, std::string> map5(std::move(map4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::btree_multimap<int, std::string> map6;
-  //   map6 = std::move(map5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::pair<int, std::string>> v = {{1, "a"}, {2, "b"}};
-  //   absl::btree_multimap<int, std::string> map7(v.begin(), v.end());
-  btree_multimap() {}
-  using Base::Base;
-
-  // btree_multimap::begin()
-  //
-  // Returns an iterator to the beginning of the `btree_multimap`.
-  using Base::begin;
-
-  // btree_multimap::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `btree_multimap`.
-  using Base::cbegin;
-
-  // btree_multimap::end()
-  //
-  // Returns an iterator to the end of the `btree_multimap`.
-  using Base::end;
-
-  // btree_multimap::cend()
-  //
-  // Returns a const iterator to the end of the `btree_multimap`.
-  using Base::cend;
-
-  // btree_multimap::empty()
-  //
-  // Returns whether or not the `btree_multimap` is empty.
-  using Base::empty;
-
-  // btree_multimap::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `btree_multimap` under current memory constraints. This value can be
-  // thought of as the largest value of `std::distance(begin(), end())` for a
-  // `btree_multimap<Key, T>`.
-  using Base::max_size;
-
-  // btree_multimap::size()
-  //
-  // Returns the number of elements currently within the `btree_multimap`.
-  using Base::size;
-
-  // btree_multimap::clear()
-  //
-  // Removes all elements from the `btree_multimap`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  using Base::clear;
-
-  // btree_multimap::erase()
-  //
-  // Erases elements within the `btree_multimap`. If an erase occurs, any
-  // references, pointers, or iterators are invalidated.
-  // Overloads are listed below.
-  //
-  // iterator erase(iterator position):
-  // iterator erase(const_iterator position):
-  //
-  //   Erases the element at `position` of the `btree_multimap`, returning
-  //   the iterator pointing to the element after the one that was erased
-  //   (or end() if none exists).
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning
-  //   the iterator pointing to the element after the interval that was erased
-  //   (or end() if none exists).
-  //
-  // template <typename K> size_type erase(const K& key):
-  //
-  //   Erases the elements matching the key, if any exist, returning the
-  //   number of elements erased.
-  using Base::erase;
-
-  // btree_multimap::insert()
-  //
-  // Inserts an element of the specified value into the `btree_multimap`,
-  // returning an iterator pointing to the newly inserted element.
-  // Any references, pointers, or iterators are invalidated.  Overloads are
-  // listed below.
-  //
-  // iterator insert(const value_type& value):
-  //
-  //   Inserts a value into the `btree_multimap`, returning an iterator to the
-  //   inserted element.
-  //
-  // iterator insert(value_type&& value):
-  //
-  //   Inserts a moveable value into the `btree_multimap`, returning an iterator
-  //   to the inserted element.
-  //
-  // iterator insert(const_iterator hint, const value_type& value):
-  // iterator insert(const_iterator hint, value_type&& value):
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  // void insert(std::initializer_list<init_type> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  using Base::insert;
-
-  // btree_multimap::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_multimap`. Any references, pointers, or iterators are
-  // invalidated.
-  using Base::emplace;
-
-  // btree_multimap::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_multimap`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search.
-  //
-  // Any references, pointers, or iterators are invalidated.
-  using Base::emplace_hint;
-
-  // btree_multimap::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the element at the indicated position and returns a node handle
-  //   owning that extracted data.
-  //
-  // template <typename K> node_type extract(const K& k):
-  //
-  //   Extracts the element with the key matching the passed key value and
-  //   returns a node handle owning that extracted data. If the `btree_multimap`
-  //   does not contain an element with a matching key, this function returns an
-  //   empty node handle.
-  //
-  // NOTE: when compiled in an earlier version of C++ than C++17,
-  // `node_type::key()` returns a const reference to the key instead of a
-  // mutable reference. We cannot safely return a mutable reference without
-  // std::launder (which is not available before C++17).
-  //
-  // NOTE: In this context, `node_type` refers to the C++17 concept of a
-  // move-only type that owns and provides access to the elements in associative
-  // containers (https://en.cppreference.com/w/cpp/container/node_handle).
-  // It does NOT refer to the data layout of the underlying btree.
-  using Base::extract;
-
-  // btree_multimap::merge()
-  //
-  // Extracts elements from a given `source` btree_multimap into this
-  // `btree_multimap`. If the destination `btree_multimap` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // btree_multimap::swap(btree_multimap& other)
-  //
-  // Exchanges the contents of this `btree_multimap` with those of the `other`
-  // btree_multimap, avoiding invocation of any move, copy, or swap operations
-  // on individual elements.
-  //
-  // All iterators and references on the `btree_multimap` remain valid,
-  // excepting for the past-the-end iterator, which is invalidated.
-  using Base::swap;
-
-  // btree_multimap::contains()
-  //
-  // template <typename K> bool contains(const K& key) const:
-  //
-  // Determines whether an element comparing equal to the given `key` exists
-  // within the `btree_multimap`, returning `true` if so or `false` otherwise.
-  //
-  // Supports heterogeneous lookup, provided that the map is provided a
-  // compatible heterogeneous comparator.
-  using Base::contains;
-
-  // btree_multimap::count()
-  //
-  // template <typename K> size_type count(const K& key) const:
-  //
-  // Returns the number of elements comparing equal to the given `key` within
-  // the `btree_multimap`.
-  //
-  // Supports heterogeneous lookup, provided that the map is provided a
-  // compatible heterogeneous comparator.
-  using Base::count;
-
-  // btree_multimap::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `btree_multimap`.
-  using Base::equal_range;
-
-  // btree_multimap::find()
-  //
-  // template <typename K> iterator find(const K& key):
-  // template <typename K> const_iterator find(const K& key) const:
-  //
-  // Finds an element with the passed `key` within the `btree_multimap`.
-  //
-  // Supports heterogeneous lookup, provided that the map is provided a
-  // compatible heterogeneous comparator.
-  using Base::find;
-
-  // btree_multimap::get_allocator()
-  //
-  // Returns the allocator function associated with this `btree_multimap`.
-  using Base::get_allocator;
-
-  // btree_multimap::key_comp();
-  //
-  // Returns the key comparator associated with this `btree_multimap`.
-  using Base::key_comp;
-
-  // btree_multimap::value_comp();
-  //
-  // Returns the value comparator associated with this `btree_multimap`.
-  using Base::value_comp;
-};
-
-// absl::swap(absl::btree_multimap<>, absl::btree_multimap<>)
-//
-// Swaps the contents of two `absl::btree_multimap` containers.
-template <typename K, typename V, typename C, typename A>
-void swap(btree_multimap<K, V, C, A> &x, btree_multimap<K, V, C, A> &y) {
-  return x.swap(y);
-}
-
-// absl::erase_if(absl::btree_multimap<>, Pred)
-//
-// Erases all elements that satisfy the predicate pred from the container.
-template <typename K, typename V, typename C, typename A, typename Pred>
-void erase_if(btree_multimap<K, V, C, A> &map, Pred pred) {
-  for (auto it = map.begin(); it != map.end();) {
-    if (pred(*it)) {
-      it = map.erase(it);
-    } else {
-      ++it;
-    }
-  }
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_BTREE_MAP_H_
diff --git a/third_party/abseil/absl/container/btree_set.h b/third_party/abseil/absl/container/btree_set.h
deleted file mode 100644
index 21ef0a0..0000000
--- a/third_party/abseil/absl/container/btree_set.h
+++ /dev/null
@@ -1,683 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: btree_set.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines B-tree sets: sorted associative containers of
-// values.
-//
-//     * `absl::btree_set<>`
-//     * `absl::btree_multiset<>`
-//
-// These B-tree types are similar to the corresponding types in the STL
-// (`std::set` and `std::multiset`) and generally conform to the STL interfaces
-// of those types. However, because they are implemented using B-trees, they
-// are more efficient in most situations.
-//
-// Unlike `std::set` and `std::multiset`, which are commonly implemented using
-// red-black tree nodes, B-tree sets use more generic B-tree nodes able to hold
-// multiple values per node. Holding multiple values per node often makes
-// B-tree sets perform better than their `std::set` counterparts, because
-// multiple entries can be checked within the same cache hit.
-//
-// However, these types should not be considered drop-in replacements for
-// `std::set` and `std::multiset` as there are some API differences, which are
-// noted in this header file.
-//
-// Importantly, insertions and deletions may invalidate outstanding iterators,
-// pointers, and references to elements. Such invalidations are typically only
-// an issue if insertion and deletion operations are interleaved with the use of
-// more than one iterator, pointer, or reference simultaneously. For this
-// reason, `insert()` and `erase()` return a valid iterator at the current
-// position.
-
-#ifndef ABSL_CONTAINER_BTREE_SET_H_
-#define ABSL_CONTAINER_BTREE_SET_H_
-
-#include "absl/container/internal/btree.h"  // IWYU pragma: export
-#include "absl/container/internal/btree_container.h"  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::btree_set<>
-//
-// An `absl::btree_set<K>` is an ordered associative container of unique key
-// values designed to be a more efficient replacement for `std::set` (in most
-// cases).
-//
-// Keys are sorted using an (optional) comparison function, which defaults to
-// `std::less<K>`.
-//
-// An `absl::btree_set<K>` uses a default allocator of `std::allocator<K>` to
-// allocate (and deallocate) nodes, and construct and destruct values within
-// those nodes. You may instead specify a custom allocator `A` (which in turn
-// requires specifying a custom comparator `C`) as in
-// `absl::btree_set<K, C, A>`.
-//
-template <typename Key, typename Compare = std::less<Key>,
-          typename Alloc = std::allocator<Key>>
-class btree_set
-    : public container_internal::btree_set_container<
-          container_internal::btree<container_internal::set_params<
-              Key, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/false>>> {
-  using Base = typename btree_set::btree_set_container;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A `btree_set` supports the same overload set as `std::set`
-  // for construction and assignment:
-  //
-  // * Default constructor
-  //
-  //   absl::btree_set<std::string> set1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::btree_set<std::string> set2 =
-  //       {{"huey"}, {"dewey"}, {"louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::btree_set<std::string> set3(set2);
-  //
-  // * Copy assignment operator
-  //
-  //  absl::btree_set<std::string> set4;
-  //  set4 = set3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::btree_set<std::string> set5(std::move(set4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::btree_set<std::string> set6;
-  //   set6 = std::move(set5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::string> v = {"a", "b"};
-  //   absl::btree_set<std::string> set7(v.begin(), v.end());
-  btree_set() {}
-  using Base::Base;
-
-  // btree_set::begin()
-  //
-  // Returns an iterator to the beginning of the `btree_set`.
-  using Base::begin;
-
-  // btree_set::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `btree_set`.
-  using Base::cbegin;
-
-  // btree_set::end()
-  //
-  // Returns an iterator to the end of the `btree_set`.
-  using Base::end;
-
-  // btree_set::cend()
-  //
-  // Returns a const iterator to the end of the `btree_set`.
-  using Base::cend;
-
-  // btree_set::empty()
-  //
-  // Returns whether or not the `btree_set` is empty.
-  using Base::empty;
-
-  // btree_set::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `btree_set` under current memory constraints. This value can be thought
-  // of as the largest value of `std::distance(begin(), end())` for a
-  // `btree_set<Key>`.
-  using Base::max_size;
-
-  // btree_set::size()
-  //
-  // Returns the number of elements currently within the `btree_set`.
-  using Base::size;
-
-  // btree_set::clear()
-  //
-  // Removes all elements from the `btree_set`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  using Base::clear;
-
-  // btree_set::erase()
-  //
-  // Erases elements within the `btree_set`. Overloads are listed below.
-  //
-  // iterator erase(iterator position):
-  // iterator erase(const_iterator position):
-  //
-  //   Erases the element at `position` of the `btree_set`, returning
-  //   the iterator pointing to the element after the one that was erased
-  //   (or end() if none exists).
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning
-  //   the iterator pointing to the element after the interval that was erased
-  //   (or end() if none exists).
-  //
-  // template <typename K> size_type erase(const K& key):
-  //
-  //   Erases the element with the matching key, if it exists, returning the
-  //   number of elements erased (0 or 1).
-  using Base::erase;
-
-  // btree_set::insert()
-  //
-  // Inserts an element of the specified value into the `btree_set`,
-  // returning an iterator pointing to the newly inserted element, provided that
-  // an element with the given key does not already exist. If an insertion
-  // occurs, any references, pointers, or iterators are invalidated.
-  // Overloads are listed below.
-  //
-  // std::pair<iterator,bool> insert(const value_type& value):
-  //
-  //   Inserts a value into the `btree_set`. Returns a pair consisting of an
-  //   iterator to the inserted element (or to the element that prevented the
-  //   insertion) and a bool denoting whether the insertion took place.
-  //
-  // std::pair<iterator,bool> insert(value_type&& value):
-  //
-  //   Inserts a moveable value into the `btree_set`. Returns a pair
-  //   consisting of an iterator to the inserted element (or to the element that
-  //   prevented the insertion) and a bool denoting whether the insertion took
-  //   place.
-  //
-  // iterator insert(const_iterator hint, const value_type& value):
-  // iterator insert(const_iterator hint, value_type&& value):
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element, or to the existing element that prevented the
-  //   insertion.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  // void insert(std::initializer_list<init_type> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  using Base::insert;
-
-  // btree_set::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_set`, provided that no element with the given key
-  // already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately.
-  //
-  // If an insertion occurs, any references, pointers, or iterators are
-  // invalidated.
-  using Base::emplace;
-
-  // btree_set::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_set`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search, and only inserts
-  // provided that no element with the given key already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately.
-  //
-  // If an insertion occurs, any references, pointers, or iterators are
-  // invalidated.
-  using Base::emplace_hint;
-
-  // btree_set::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the element at the indicated position and returns a node handle
-  //   owning that extracted data.
-  //
-  // template <typename K> node_type extract(const K& k):
-  //
-  //   Extracts the element with the key matching the passed key value and
-  //   returns a node handle owning that extracted data. If the `btree_set`
-  //   does not contain an element with a matching key, this function returns an
-  //   empty node handle.
-  //
-  // NOTE: In this context, `node_type` refers to the C++17 concept of a
-  // move-only type that owns and provides access to the elements in associative
-  // containers (https://en.cppreference.com/w/cpp/container/node_handle).
-  // It does NOT refer to the data layout of the underlying btree.
-  using Base::extract;
-
-  // btree_set::merge()
-  //
-  // Extracts elements from a given `source` btree_set into this
-  // `btree_set`. If the destination `btree_set` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // btree_set::swap(btree_set& other)
-  //
-  // Exchanges the contents of this `btree_set` with those of the `other`
-  // btree_set, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
-  //
-  // All iterators and references on the `btree_set` remain valid, excepting
-  // for the past-the-end iterator, which is invalidated.
-  using Base::swap;
-
-  // btree_set::contains()
-  //
-  // template <typename K> bool contains(const K& key) const:
-  //
-  // Determines whether an element comparing equal to the given `key` exists
-  // within the `btree_set`, returning `true` if so or `false` otherwise.
-  //
-  // Supports heterogeneous lookup, provided that the set is provided a
-  // compatible heterogeneous comparator.
-  using Base::contains;
-
-  // btree_set::count()
-  //
-  // template <typename K> size_type count(const K& key) const:
-  //
-  // Returns the number of elements comparing equal to the given `key` within
-  // the `btree_set`. Note that this function will return either `1` or `0`
-  // since duplicate elements are not allowed within a `btree_set`.
-  //
-  // Supports heterogeneous lookup, provided that the set is provided a
-  // compatible heterogeneous comparator.
-  using Base::count;
-
-  // btree_set::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `btree_set`.
-  using Base::equal_range;
-
-  // btree_set::find()
-  //
-  // template <typename K> iterator find(const K& key):
-  // template <typename K> const_iterator find(const K& key) const:
-  //
-  // Finds an element with the passed `key` within the `btree_set`.
-  //
-  // Supports heterogeneous lookup, provided that the set is provided a
-  // compatible heterogeneous comparator.
-  using Base::find;
-
-  // btree_set::get_allocator()
-  //
-  // Returns the allocator function associated with this `btree_set`.
-  using Base::get_allocator;
-
-  // btree_set::key_comp();
-  //
-  // Returns the key comparator associated with this `btree_set`.
-  using Base::key_comp;
-
-  // btree_set::value_comp();
-  //
-  // Returns the value comparator associated with this `btree_set`. The keys to
-  // sort the elements are the values themselves, therefore `value_comp` and its
-  // sibling member function `key_comp` are equivalent.
-  using Base::value_comp;
-};
-
-// absl::swap(absl::btree_set<>, absl::btree_set<>)
-//
-// Swaps the contents of two `absl::btree_set` containers.
-template <typename K, typename C, typename A>
-void swap(btree_set<K, C, A> &x, btree_set<K, C, A> &y) {
-  return x.swap(y);
-}
-
-// absl::erase_if(absl::btree_set<>, Pred)
-//
-// Erases all elements that satisfy the predicate pred from the container.
-template <typename K, typename C, typename A, typename Pred>
-void erase_if(btree_set<K, C, A> &set, Pred pred) {
-  for (auto it = set.begin(); it != set.end();) {
-    if (pred(*it)) {
-      it = set.erase(it);
-    } else {
-      ++it;
-    }
-  }
-}
-
-// absl::btree_multiset<>
-//
-// An `absl::btree_multiset<K>` is an ordered associative container of
-// keys and associated values designed to be a more efficient replacement
-// for `std::multiset` (in most cases). Unlike `absl::btree_set`, a B-tree
-// multiset allows equivalent elements.
-//
-// Keys are sorted using an (optional) comparison function, which defaults to
-// `std::less<K>`.
-//
-// An `absl::btree_multiset<K>` uses a default allocator of `std::allocator<K>`
-// to allocate (and deallocate) nodes, and construct and destruct values within
-// those nodes. You may instead specify a custom allocator `A` (which in turn
-// requires specifying a custom comparator `C`) as in
-// `absl::btree_multiset<K, C, A>`.
-//
-template <typename Key, typename Compare = std::less<Key>,
-          typename Alloc = std::allocator<Key>>
-class btree_multiset
-    : public container_internal::btree_multiset_container<
-          container_internal::btree<container_internal::set_params<
-              Key, Compare, Alloc, /*TargetNodeSize=*/256,
-              /*Multi=*/true>>> {
-  using Base = typename btree_multiset::btree_multiset_container;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A `btree_multiset` supports the same overload set as `std::set`
-  // for construction and assignment:
-  //
-  // * Default constructor
-  //
-  //   absl::btree_multiset<std::string> set1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::btree_multiset<std::string> set2 =
-  //       {{"huey"}, {"dewey"}, {"louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::btree_multiset<std::string> set3(set2);
-  //
-  // * Copy assignment operator
-  //
-  //  absl::btree_multiset<std::string> set4;
-  //  set4 = set3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::btree_multiset<std::string> set5(std::move(set4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::btree_multiset<std::string> set6;
-  //   set6 = std::move(set5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::string> v = {"a", "b"};
-  //   absl::btree_multiset<std::string> set7(v.begin(), v.end());
-  btree_multiset() {}
-  using Base::Base;
-
-  // btree_multiset::begin()
-  //
-  // Returns an iterator to the beginning of the `btree_multiset`.
-  using Base::begin;
-
-  // btree_multiset::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `btree_multiset`.
-  using Base::cbegin;
-
-  // btree_multiset::end()
-  //
-  // Returns an iterator to the end of the `btree_multiset`.
-  using Base::end;
-
-  // btree_multiset::cend()
-  //
-  // Returns a const iterator to the end of the `btree_multiset`.
-  using Base::cend;
-
-  // btree_multiset::empty()
-  //
-  // Returns whether or not the `btree_multiset` is empty.
-  using Base::empty;
-
-  // btree_multiset::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `btree_multiset` under current memory constraints. This value can be
-  // thought of as the largest value of `std::distance(begin(), end())` for a
-  // `btree_multiset<Key>`.
-  using Base::max_size;
-
-  // btree_multiset::size()
-  //
-  // Returns the number of elements currently within the `btree_multiset`.
-  using Base::size;
-
-  // btree_multiset::clear()
-  //
-  // Removes all elements from the `btree_multiset`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  using Base::clear;
-
-  // btree_multiset::erase()
-  //
-  // Erases elements within the `btree_multiset`. Overloads are listed below.
-  //
-  // iterator erase(iterator position):
-  // iterator erase(const_iterator position):
-  //
-  //   Erases the element at `position` of the `btree_multiset`, returning
-  //   the iterator pointing to the element after the one that was erased
-  //   (or end() if none exists).
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning
-  //   the iterator pointing to the element after the interval that was erased
-  //   (or end() if none exists).
-  //
-  // template <typename K> size_type erase(const K& key):
-  //
-  //   Erases the elements matching the key, if any exist, returning the
-  //   number of elements erased.
-  using Base::erase;
-
-  // btree_multiset::insert()
-  //
-  // Inserts an element of the specified value into the `btree_multiset`,
-  // returning an iterator pointing to the newly inserted element.
-  // Any references, pointers, or iterators are invalidated.  Overloads are
-  // listed below.
-  //
-  // iterator insert(const value_type& value):
-  //
-  //   Inserts a value into the `btree_multiset`, returning an iterator to the
-  //   inserted element.
-  //
-  // iterator insert(value_type&& value):
-  //
-  //   Inserts a moveable value into the `btree_multiset`, returning an iterator
-  //   to the inserted element.
-  //
-  // iterator insert(const_iterator hint, const value_type& value):
-  // iterator insert(const_iterator hint, value_type&& value):
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  // void insert(std::initializer_list<init_type> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  using Base::insert;
-
-  // btree_multiset::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_multiset`. Any references, pointers, or iterators are
-  // invalidated.
-  using Base::emplace;
-
-  // btree_multiset::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `btree_multiset`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search.
-  //
-  // Any references, pointers, or iterators are invalidated.
-  using Base::emplace_hint;
-
-  // btree_multiset::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the element at the indicated position and returns a node handle
-  //   owning that extracted data.
-  //
-  // template <typename K> node_type extract(const K& k):
-  //
-  //   Extracts the element with the key matching the passed key value and
-  //   returns a node handle owning that extracted data. If the `btree_multiset`
-  //   does not contain an element with a matching key, this function returns an
-  //   empty node handle.
-  //
-  // NOTE: In this context, `node_type` refers to the C++17 concept of a
-  // move-only type that owns and provides access to the elements in associative
-  // containers (https://en.cppreference.com/w/cpp/container/node_handle).
-  // It does NOT refer to the data layout of the underlying btree.
-  using Base::extract;
-
-  // btree_multiset::merge()
-  //
-  // Extracts elements from a given `source` btree_multiset into this
-  // `btree_multiset`. If the destination `btree_multiset` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // btree_multiset::swap(btree_multiset& other)
-  //
-  // Exchanges the contents of this `btree_multiset` with those of the `other`
-  // btree_multiset, avoiding invocation of any move, copy, or swap operations
-  // on individual elements.
-  //
-  // All iterators and references on the `btree_multiset` remain valid,
-  // excepting for the past-the-end iterator, which is invalidated.
-  using Base::swap;
-
-  // btree_multiset::contains()
-  //
-  // template <typename K> bool contains(const K& key) const:
-  //
-  // Determines whether an element comparing equal to the given `key` exists
-  // within the `btree_multiset`, returning `true` if so or `false` otherwise.
-  //
-  // Supports heterogeneous lookup, provided that the set is provided a
-  // compatible heterogeneous comparator.
-  using Base::contains;
-
-  // btree_multiset::count()
-  //
-  // template <typename K> size_type count(const K& key) const:
-  //
-  // Returns the number of elements comparing equal to the given `key` within
-  // the `btree_multiset`.
-  //
-  // Supports heterogeneous lookup, provided that the set is provided a
-  // compatible heterogeneous comparator.
-  using Base::count;
-
-  // btree_multiset::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `btree_multiset`.
-  using Base::equal_range;
-
-  // btree_multiset::find()
-  //
-  // template <typename K> iterator find(const K& key):
-  // template <typename K> const_iterator find(const K& key) const:
-  //
-  // Finds an element with the passed `key` within the `btree_multiset`.
-  //
-  // Supports heterogeneous lookup, provided that the set is provided a
-  // compatible heterogeneous comparator.
-  using Base::find;
-
-  // btree_multiset::get_allocator()
-  //
-  // Returns the allocator function associated with this `btree_multiset`.
-  using Base::get_allocator;
-
-  // btree_multiset::key_comp();
-  //
-  // Returns the key comparator associated with this `btree_multiset`.
-  using Base::key_comp;
-
-  // btree_multiset::value_comp();
-  //
-  // Returns the value comparator associated with this `btree_multiset`. The
-  // keys to sort the elements are the values themselves, therefore `value_comp`
-  // and its sibling member function `key_comp` are equivalent.
-  using Base::value_comp;
-};
-
-// absl::swap(absl::btree_multiset<>, absl::btree_multiset<>)
-//
-// Swaps the contents of two `absl::btree_multiset` containers.
-template <typename K, typename C, typename A>
-void swap(btree_multiset<K, C, A> &x, btree_multiset<K, C, A> &y) {
-  return x.swap(y);
-}
-
-// absl::erase_if(absl::btree_multiset<>, Pred)
-//
-// Erases all elements that satisfy the predicate pred from the container.
-template <typename K, typename C, typename A, typename Pred>
-void erase_if(btree_multiset<K, C, A> &set, Pred pred) {
-  for (auto it = set.begin(); it != set.end();) {
-    if (pred(*it)) {
-      it = set.erase(it);
-    } else {
-      ++it;
-    }
-  }
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_BTREE_SET_H_
diff --git a/third_party/abseil/absl/container/btree_test.cc b/third_party/abseil/absl/container/btree_test.cc
deleted file mode 100644
index 367d75b..0000000
--- a/third_party/abseil/absl/container/btree_test.cc
+++ /dev/null
@@ -1,2899 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/btree_test.h"
-
-#include <cstdint>
-#include <limits>
-#include <map>
-#include <memory>
-#include <stdexcept>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/container/btree_map.h"
-#include "absl/container/btree_set.h"
-#include "absl/container/internal/counting_allocator.h"
-#include "absl/container/internal/test_instance_tracker.h"
-#include "absl/flags/flag.h"
-#include "absl/hash/hash_testing.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/compare.h"
-
-ABSL_FLAG(int, test_values, 10000, "The number of values to use for tests");
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::absl::test_internal::CopyableMovableInstance;
-using ::absl::test_internal::InstanceTracker;
-using ::absl::test_internal::MovableOnlyInstance;
-using ::testing::ElementsAre;
-using ::testing::ElementsAreArray;
-using ::testing::IsEmpty;
-using ::testing::IsNull;
-using ::testing::Pair;
-using ::testing::SizeIs;
-
-template <typename T, typename U>
-void CheckPairEquals(const T &x, const U &y) {
-  ABSL_INTERNAL_CHECK(x == y, "Values are unequal.");
-}
-
-template <typename T, typename U, typename V, typename W>
-void CheckPairEquals(const std::pair<T, U> &x, const std::pair<V, W> &y) {
-  CheckPairEquals(x.first, y.first);
-  CheckPairEquals(x.second, y.second);
-}
-}  // namespace
-
-// The base class for a sorted associative container checker. TreeType is the
-// container type to check and CheckerType is the container type to check
-// against. TreeType is expected to be btree_{set,map,multiset,multimap} and
-// CheckerType is expected to be {set,map,multiset,multimap}.
-template <typename TreeType, typename CheckerType>
-class base_checker {
- public:
-  using key_type = typename TreeType::key_type;
-  using value_type = typename TreeType::value_type;
-  using key_compare = typename TreeType::key_compare;
-  using pointer = typename TreeType::pointer;
-  using const_pointer = typename TreeType::const_pointer;
-  using reference = typename TreeType::reference;
-  using const_reference = typename TreeType::const_reference;
-  using size_type = typename TreeType::size_type;
-  using difference_type = typename TreeType::difference_type;
-  using iterator = typename TreeType::iterator;
-  using const_iterator = typename TreeType::const_iterator;
-  using reverse_iterator = typename TreeType::reverse_iterator;
-  using const_reverse_iterator = typename TreeType::const_reverse_iterator;
-
- public:
-  base_checker() : const_tree_(tree_) {}
-  base_checker(const base_checker &other)
-      : tree_(other.tree_), const_tree_(tree_), checker_(other.checker_) {}
-  template <typename InputIterator>
-  base_checker(InputIterator b, InputIterator e)
-      : tree_(b, e), const_tree_(tree_), checker_(b, e) {}
-
-  iterator begin() { return tree_.begin(); }
-  const_iterator begin() const { return tree_.begin(); }
-  iterator end() { return tree_.end(); }
-  const_iterator end() const { return tree_.end(); }
-  reverse_iterator rbegin() { return tree_.rbegin(); }
-  const_reverse_iterator rbegin() const { return tree_.rbegin(); }
-  reverse_iterator rend() { return tree_.rend(); }
-  const_reverse_iterator rend() const { return tree_.rend(); }
-
-  template <typename IterType, typename CheckerIterType>
-  IterType iter_check(IterType tree_iter, CheckerIterType checker_iter) const {
-    if (tree_iter == tree_.end()) {
-      ABSL_INTERNAL_CHECK(checker_iter == checker_.end(),
-                          "Checker iterator not at end.");
-    } else {
-      CheckPairEquals(*tree_iter, *checker_iter);
-    }
-    return tree_iter;
-  }
-  template <typename IterType, typename CheckerIterType>
-  IterType riter_check(IterType tree_iter, CheckerIterType checker_iter) const {
-    if (tree_iter == tree_.rend()) {
-      ABSL_INTERNAL_CHECK(checker_iter == checker_.rend(),
-                          "Checker iterator not at rend.");
-    } else {
-      CheckPairEquals(*tree_iter, *checker_iter);
-    }
-    return tree_iter;
-  }
-  void value_check(const value_type &v) {
-    typename KeyOfValue<typename TreeType::key_type,
-                        typename TreeType::value_type>::type key_of_value;
-    const key_type &key = key_of_value(v);
-    CheckPairEquals(*find(key), v);
-    lower_bound(key);
-    upper_bound(key);
-    equal_range(key);
-    contains(key);
-    count(key);
-  }
-  void erase_check(const key_type &key) {
-    EXPECT_FALSE(tree_.contains(key));
-    EXPECT_EQ(tree_.find(key), const_tree_.end());
-    EXPECT_FALSE(const_tree_.contains(key));
-    EXPECT_EQ(const_tree_.find(key), tree_.end());
-    EXPECT_EQ(tree_.equal_range(key).first,
-              const_tree_.equal_range(key).second);
-  }
-
-  iterator lower_bound(const key_type &key) {
-    return iter_check(tree_.lower_bound(key), checker_.lower_bound(key));
-  }
-  const_iterator lower_bound(const key_type &key) const {
-    return iter_check(tree_.lower_bound(key), checker_.lower_bound(key));
-  }
-  iterator upper_bound(const key_type &key) {
-    return iter_check(tree_.upper_bound(key), checker_.upper_bound(key));
-  }
-  const_iterator upper_bound(const key_type &key) const {
-    return iter_check(tree_.upper_bound(key), checker_.upper_bound(key));
-  }
-  std::pair<iterator, iterator> equal_range(const key_type &key) {
-    std::pair<typename CheckerType::iterator, typename CheckerType::iterator>
-        checker_res = checker_.equal_range(key);
-    std::pair<iterator, iterator> tree_res = tree_.equal_range(key);
-    iter_check(tree_res.first, checker_res.first);
-    iter_check(tree_res.second, checker_res.second);
-    return tree_res;
-  }
-  std::pair<const_iterator, const_iterator> equal_range(
-      const key_type &key) const {
-    std::pair<typename CheckerType::const_iterator,
-              typename CheckerType::const_iterator>
-        checker_res = checker_.equal_range(key);
-    std::pair<const_iterator, const_iterator> tree_res = tree_.equal_range(key);
-    iter_check(tree_res.first, checker_res.first);
-    iter_check(tree_res.second, checker_res.second);
-    return tree_res;
-  }
-  iterator find(const key_type &key) {
-    return iter_check(tree_.find(key), checker_.find(key));
-  }
-  const_iterator find(const key_type &key) const {
-    return iter_check(tree_.find(key), checker_.find(key));
-  }
-  bool contains(const key_type &key) const { return find(key) != end(); }
-  size_type count(const key_type &key) const {
-    size_type res = checker_.count(key);
-    EXPECT_EQ(res, tree_.count(key));
-    return res;
-  }
-
-  base_checker &operator=(const base_checker &other) {
-    tree_ = other.tree_;
-    checker_ = other.checker_;
-    return *this;
-  }
-
-  int erase(const key_type &key) {
-    int size = tree_.size();
-    int res = checker_.erase(key);
-    EXPECT_EQ(res, tree_.count(key));
-    EXPECT_EQ(res, tree_.erase(key));
-    EXPECT_EQ(tree_.count(key), 0);
-    EXPECT_EQ(tree_.size(), size - res);
-    erase_check(key);
-    return res;
-  }
-  iterator erase(iterator iter) {
-    key_type key = iter.key();
-    int size = tree_.size();
-    int count = tree_.count(key);
-    auto checker_iter = checker_.lower_bound(key);
-    for (iterator tmp(tree_.lower_bound(key)); tmp != iter; ++tmp) {
-      ++checker_iter;
-    }
-    auto checker_next = checker_iter;
-    ++checker_next;
-    checker_.erase(checker_iter);
-    iter = tree_.erase(iter);
-    EXPECT_EQ(tree_.size(), checker_.size());
-    EXPECT_EQ(tree_.size(), size - 1);
-    EXPECT_EQ(tree_.count(key), count - 1);
-    if (count == 1) {
-      erase_check(key);
-    }
-    return iter_check(iter, checker_next);
-  }
-
-  void erase(iterator begin, iterator end) {
-    int size = tree_.size();
-    int count = std::distance(begin, end);
-    auto checker_begin = checker_.lower_bound(begin.key());
-    for (iterator tmp(tree_.lower_bound(begin.key())); tmp != begin; ++tmp) {
-      ++checker_begin;
-    }
-    auto checker_end =
-        end == tree_.end() ? checker_.end() : checker_.lower_bound(end.key());
-    if (end != tree_.end()) {
-      for (iterator tmp(tree_.lower_bound(end.key())); tmp != end; ++tmp) {
-        ++checker_end;
-      }
-    }
-    const auto checker_ret = checker_.erase(checker_begin, checker_end);
-    const auto tree_ret = tree_.erase(begin, end);
-    EXPECT_EQ(std::distance(checker_.begin(), checker_ret),
-              std::distance(tree_.begin(), tree_ret));
-    EXPECT_EQ(tree_.size(), checker_.size());
-    EXPECT_EQ(tree_.size(), size - count);
-  }
-
-  void clear() {
-    tree_.clear();
-    checker_.clear();
-  }
-  void swap(base_checker &other) {
-    tree_.swap(other.tree_);
-    checker_.swap(other.checker_);
-  }
-
-  void verify() const {
-    tree_.verify();
-    EXPECT_EQ(tree_.size(), checker_.size());
-
-    // Move through the forward iterators using increment.
-    auto checker_iter = checker_.begin();
-    const_iterator tree_iter(tree_.begin());
-    for (; tree_iter != tree_.end(); ++tree_iter, ++checker_iter) {
-      CheckPairEquals(*tree_iter, *checker_iter);
-    }
-
-    // Move through the forward iterators using decrement.
-    for (int n = tree_.size() - 1; n >= 0; --n) {
-      iter_check(tree_iter, checker_iter);
-      --tree_iter;
-      --checker_iter;
-    }
-    EXPECT_EQ(tree_iter, tree_.begin());
-    EXPECT_EQ(checker_iter, checker_.begin());
-
-    // Move through the reverse iterators using increment.
-    auto checker_riter = checker_.rbegin();
-    const_reverse_iterator tree_riter(tree_.rbegin());
-    for (; tree_riter != tree_.rend(); ++tree_riter, ++checker_riter) {
-      CheckPairEquals(*tree_riter, *checker_riter);
-    }
-
-    // Move through the reverse iterators using decrement.
-    for (int n = tree_.size() - 1; n >= 0; --n) {
-      riter_check(tree_riter, checker_riter);
-      --tree_riter;
-      --checker_riter;
-    }
-    EXPECT_EQ(tree_riter, tree_.rbegin());
-    EXPECT_EQ(checker_riter, checker_.rbegin());
-  }
-
-  const TreeType &tree() const { return tree_; }
-
-  size_type size() const {
-    EXPECT_EQ(tree_.size(), checker_.size());
-    return tree_.size();
-  }
-  size_type max_size() const { return tree_.max_size(); }
-  bool empty() const {
-    EXPECT_EQ(tree_.empty(), checker_.empty());
-    return tree_.empty();
-  }
-
- protected:
-  TreeType tree_;
-  const TreeType &const_tree_;
-  CheckerType checker_;
-};
-
-namespace {
-// A checker for unique sorted associative containers. TreeType is expected to
-// be btree_{set,map} and CheckerType is expected to be {set,map}.
-template <typename TreeType, typename CheckerType>
-class unique_checker : public base_checker<TreeType, CheckerType> {
-  using super_type = base_checker<TreeType, CheckerType>;
-
- public:
-  using iterator = typename super_type::iterator;
-  using value_type = typename super_type::value_type;
-
- public:
-  unique_checker() : super_type() {}
-  unique_checker(const unique_checker &other) : super_type(other) {}
-  template <class InputIterator>
-  unique_checker(InputIterator b, InputIterator e) : super_type(b, e) {}
-  unique_checker &operator=(const unique_checker &) = default;
-
-  // Insertion routines.
-  std::pair<iterator, bool> insert(const value_type &v) {
-    int size = this->tree_.size();
-    std::pair<typename CheckerType::iterator, bool> checker_res =
-        this->checker_.insert(v);
-    std::pair<iterator, bool> tree_res = this->tree_.insert(v);
-    CheckPairEquals(*tree_res.first, *checker_res.first);
-    EXPECT_EQ(tree_res.second, checker_res.second);
-    EXPECT_EQ(this->tree_.size(), this->checker_.size());
-    EXPECT_EQ(this->tree_.size(), size + tree_res.second);
-    return tree_res;
-  }
-  iterator insert(iterator position, const value_type &v) {
-    int size = this->tree_.size();
-    std::pair<typename CheckerType::iterator, bool> checker_res =
-        this->checker_.insert(v);
-    iterator tree_res = this->tree_.insert(position, v);
-    CheckPairEquals(*tree_res, *checker_res.first);
-    EXPECT_EQ(this->tree_.size(), this->checker_.size());
-    EXPECT_EQ(this->tree_.size(), size + checker_res.second);
-    return tree_res;
-  }
-  template <typename InputIterator>
-  void insert(InputIterator b, InputIterator e) {
-    for (; b != e; ++b) {
-      insert(*b);
-    }
-  }
-};
-
-// A checker for multiple sorted associative containers. TreeType is expected
-// to be btree_{multiset,multimap} and CheckerType is expected to be
-// {multiset,multimap}.
-template <typename TreeType, typename CheckerType>
-class multi_checker : public base_checker<TreeType, CheckerType> {
-  using super_type = base_checker<TreeType, CheckerType>;
-
- public:
-  using iterator = typename super_type::iterator;
-  using value_type = typename super_type::value_type;
-
- public:
-  multi_checker() : super_type() {}
-  multi_checker(const multi_checker &other) : super_type(other) {}
-  template <class InputIterator>
-  multi_checker(InputIterator b, InputIterator e) : super_type(b, e) {}
-  multi_checker &operator=(const multi_checker &) = default;
-
-  // Insertion routines.
-  iterator insert(const value_type &v) {
-    int size = this->tree_.size();
-    auto checker_res = this->checker_.insert(v);
-    iterator tree_res = this->tree_.insert(v);
-    CheckPairEquals(*tree_res, *checker_res);
-    EXPECT_EQ(this->tree_.size(), this->checker_.size());
-    EXPECT_EQ(this->tree_.size(), size + 1);
-    return tree_res;
-  }
-  iterator insert(iterator position, const value_type &v) {
-    int size = this->tree_.size();
-    auto checker_res = this->checker_.insert(v);
-    iterator tree_res = this->tree_.insert(position, v);
-    CheckPairEquals(*tree_res, *checker_res);
-    EXPECT_EQ(this->tree_.size(), this->checker_.size());
-    EXPECT_EQ(this->tree_.size(), size + 1);
-    return tree_res;
-  }
-  template <typename InputIterator>
-  void insert(InputIterator b, InputIterator e) {
-    for (; b != e; ++b) {
-      insert(*b);
-    }
-  }
-};
-
-template <typename T, typename V>
-void DoTest(const char *name, T *b, const std::vector<V> &values) {
-  typename KeyOfValue<typename T::key_type, V>::type key_of_value;
-
-  T &mutable_b = *b;
-  const T &const_b = *b;
-
-  // Test insert.
-  for (int i = 0; i < values.size(); ++i) {
-    mutable_b.insert(values[i]);
-    mutable_b.value_check(values[i]);
-  }
-  ASSERT_EQ(mutable_b.size(), values.size());
-
-  const_b.verify();
-
-  // Test copy constructor.
-  T b_copy(const_b);
-  EXPECT_EQ(b_copy.size(), const_b.size());
-  for (int i = 0; i < values.size(); ++i) {
-    CheckPairEquals(*b_copy.find(key_of_value(values[i])), values[i]);
-  }
-
-  // Test range constructor.
-  T b_range(const_b.begin(), const_b.end());
-  EXPECT_EQ(b_range.size(), const_b.size());
-  for (int i = 0; i < values.size(); ++i) {
-    CheckPairEquals(*b_range.find(key_of_value(values[i])), values[i]);
-  }
-
-  // Test range insertion for values that already exist.
-  b_range.insert(b_copy.begin(), b_copy.end());
-  b_range.verify();
-
-  // Test range insertion for new values.
-  b_range.clear();
-  b_range.insert(b_copy.begin(), b_copy.end());
-  EXPECT_EQ(b_range.size(), b_copy.size());
-  for (int i = 0; i < values.size(); ++i) {
-    CheckPairEquals(*b_range.find(key_of_value(values[i])), values[i]);
-  }
-
-  // Test assignment to self. Nothing should change.
-  b_range.operator=(b_range);
-  EXPECT_EQ(b_range.size(), b_copy.size());
-
-  // Test assignment of new values.
-  b_range.clear();
-  b_range = b_copy;
-  EXPECT_EQ(b_range.size(), b_copy.size());
-
-  // Test swap.
-  b_range.clear();
-  b_range.swap(b_copy);
-  EXPECT_EQ(b_copy.size(), 0);
-  EXPECT_EQ(b_range.size(), const_b.size());
-  for (int i = 0; i < values.size(); ++i) {
-    CheckPairEquals(*b_range.find(key_of_value(values[i])), values[i]);
-  }
-  b_range.swap(b_copy);
-
-  // Test non-member function swap.
-  swap(b_range, b_copy);
-  EXPECT_EQ(b_copy.size(), 0);
-  EXPECT_EQ(b_range.size(), const_b.size());
-  for (int i = 0; i < values.size(); ++i) {
-    CheckPairEquals(*b_range.find(key_of_value(values[i])), values[i]);
-  }
-  swap(b_range, b_copy);
-
-  // Test erase via values.
-  for (int i = 0; i < values.size(); ++i) {
-    mutable_b.erase(key_of_value(values[i]));
-    // Erasing a non-existent key should have no effect.
-    ASSERT_EQ(mutable_b.erase(key_of_value(values[i])), 0);
-  }
-
-  const_b.verify();
-  EXPECT_EQ(const_b.size(), 0);
-
-  // Test erase via iterators.
-  mutable_b = b_copy;
-  for (int i = 0; i < values.size(); ++i) {
-    mutable_b.erase(mutable_b.find(key_of_value(values[i])));
-  }
-
-  const_b.verify();
-  EXPECT_EQ(const_b.size(), 0);
-
-  // Test insert with hint.
-  for (int i = 0; i < values.size(); i++) {
-    mutable_b.insert(mutable_b.upper_bound(key_of_value(values[i])), values[i]);
-  }
-
-  const_b.verify();
-
-  // Test range erase.
-  mutable_b.erase(mutable_b.begin(), mutable_b.end());
-  EXPECT_EQ(mutable_b.size(), 0);
-  const_b.verify();
-
-  // First half.
-  mutable_b = b_copy;
-  typename T::iterator mutable_iter_end = mutable_b.begin();
-  for (int i = 0; i < values.size() / 2; ++i) ++mutable_iter_end;
-  mutable_b.erase(mutable_b.begin(), mutable_iter_end);
-  EXPECT_EQ(mutable_b.size(), values.size() - values.size() / 2);
-  const_b.verify();
-
-  // Second half.
-  mutable_b = b_copy;
-  typename T::iterator mutable_iter_begin = mutable_b.begin();
-  for (int i = 0; i < values.size() / 2; ++i) ++mutable_iter_begin;
-  mutable_b.erase(mutable_iter_begin, mutable_b.end());
-  EXPECT_EQ(mutable_b.size(), values.size() / 2);
-  const_b.verify();
-
-  // Second quarter.
-  mutable_b = b_copy;
-  mutable_iter_begin = mutable_b.begin();
-  for (int i = 0; i < values.size() / 4; ++i) ++mutable_iter_begin;
-  mutable_iter_end = mutable_iter_begin;
-  for (int i = 0; i < values.size() / 4; ++i) ++mutable_iter_end;
-  mutable_b.erase(mutable_iter_begin, mutable_iter_end);
-  EXPECT_EQ(mutable_b.size(), values.size() - values.size() / 4);
-  const_b.verify();
-
-  mutable_b.clear();
-}
-
-template <typename T>
-void ConstTest() {
-  using value_type = typename T::value_type;
-  typename KeyOfValue<typename T::key_type, value_type>::type key_of_value;
-
-  T mutable_b;
-  const T &const_b = mutable_b;
-
-  // Insert a single value into the container and test looking it up.
-  value_type value = Generator<value_type>(2)(2);
-  mutable_b.insert(value);
-  EXPECT_TRUE(mutable_b.contains(key_of_value(value)));
-  EXPECT_NE(mutable_b.find(key_of_value(value)), const_b.end());
-  EXPECT_TRUE(const_b.contains(key_of_value(value)));
-  EXPECT_NE(const_b.find(key_of_value(value)), mutable_b.end());
-  EXPECT_EQ(*const_b.lower_bound(key_of_value(value)), value);
-  EXPECT_EQ(const_b.upper_bound(key_of_value(value)), const_b.end());
-  EXPECT_EQ(*const_b.equal_range(key_of_value(value)).first, value);
-
-  // We can only create a non-const iterator from a non-const container.
-  typename T::iterator mutable_iter(mutable_b.begin());
-  EXPECT_EQ(mutable_iter, const_b.begin());
-  EXPECT_NE(mutable_iter, const_b.end());
-  EXPECT_EQ(const_b.begin(), mutable_iter);
-  EXPECT_NE(const_b.end(), mutable_iter);
-  typename T::reverse_iterator mutable_riter(mutable_b.rbegin());
-  EXPECT_EQ(mutable_riter, const_b.rbegin());
-  EXPECT_NE(mutable_riter, const_b.rend());
-  EXPECT_EQ(const_b.rbegin(), mutable_riter);
-  EXPECT_NE(const_b.rend(), mutable_riter);
-
-  // We can create a const iterator from a non-const iterator.
-  typename T::const_iterator const_iter(mutable_iter);
-  EXPECT_EQ(const_iter, mutable_b.begin());
-  EXPECT_NE(const_iter, mutable_b.end());
-  EXPECT_EQ(mutable_b.begin(), const_iter);
-  EXPECT_NE(mutable_b.end(), const_iter);
-  typename T::const_reverse_iterator const_riter(mutable_riter);
-  EXPECT_EQ(const_riter, mutable_b.rbegin());
-  EXPECT_NE(const_riter, mutable_b.rend());
-  EXPECT_EQ(mutable_b.rbegin(), const_riter);
-  EXPECT_NE(mutable_b.rend(), const_riter);
-
-  // Make sure various methods can be invoked on a const container.
-  const_b.verify();
-  ASSERT_TRUE(!const_b.empty());
-  EXPECT_EQ(const_b.size(), 1);
-  EXPECT_GT(const_b.max_size(), 0);
-  EXPECT_TRUE(const_b.contains(key_of_value(value)));
-  EXPECT_EQ(const_b.count(key_of_value(value)), 1);
-}
-
-template <typename T, typename C>
-void BtreeTest() {
-  ConstTest<T>();
-
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  const std::vector<V> random_values = GenerateValuesWithSeed<V>(
-      absl::GetFlag(FLAGS_test_values), 4 * absl::GetFlag(FLAGS_test_values),
-      testing::GTEST_FLAG(random_seed));
-
-  unique_checker<T, C> container;
-
-  // Test key insertion/deletion in sorted order.
-  std::vector<V> sorted_values(random_values);
-  std::sort(sorted_values.begin(), sorted_values.end());
-  DoTest("sorted:    ", &container, sorted_values);
-
-  // Test key insertion/deletion in reverse sorted order.
-  std::reverse(sorted_values.begin(), sorted_values.end());
-  DoTest("rsorted:   ", &container, sorted_values);
-
-  // Test key insertion/deletion in random order.
-  DoTest("random:    ", &container, random_values);
-}
-
-template <typename T, typename C>
-void BtreeMultiTest() {
-  ConstTest<T>();
-
-  using V = typename remove_pair_const<typename T::value_type>::type;
-  const std::vector<V> random_values = GenerateValuesWithSeed<V>(
-      absl::GetFlag(FLAGS_test_values), 4 * absl::GetFlag(FLAGS_test_values),
-      testing::GTEST_FLAG(random_seed));
-
-  multi_checker<T, C> container;
-
-  // Test keys in sorted order.
-  std::vector<V> sorted_values(random_values);
-  std::sort(sorted_values.begin(), sorted_values.end());
-  DoTest("sorted:    ", &container, sorted_values);
-
-  // Test keys in reverse sorted order.
-  std::reverse(sorted_values.begin(), sorted_values.end());
-  DoTest("rsorted:   ", &container, sorted_values);
-
-  // Test keys in random order.
-  DoTest("random:    ", &container, random_values);
-
-  // Test keys in random order w/ duplicates.
-  std::vector<V> duplicate_values(random_values);
-  duplicate_values.insert(duplicate_values.end(), random_values.begin(),
-                          random_values.end());
-  DoTest("duplicates:", &container, duplicate_values);
-
-  // Test all identical keys.
-  std::vector<V> identical_values(100);
-  std::fill(identical_values.begin(), identical_values.end(),
-            Generator<V>(2)(2));
-  DoTest("identical: ", &container, identical_values);
-}
-
-template <typename T>
-struct PropagatingCountingAlloc : public CountingAllocator<T> {
-  using propagate_on_container_copy_assignment = std::true_type;
-  using propagate_on_container_move_assignment = std::true_type;
-  using propagate_on_container_swap = std::true_type;
-
-  using Base = CountingAllocator<T>;
-  using Base::Base;
-
-  template <typename U>
-  explicit PropagatingCountingAlloc(const PropagatingCountingAlloc<U> &other)
-      : Base(other.bytes_used_) {}
-
-  template <typename U>
-  struct rebind {
-    using other = PropagatingCountingAlloc<U>;
-  };
-};
-
-template <typename T>
-void BtreeAllocatorTest() {
-  using value_type = typename T::value_type;
-
-  int64_t bytes1 = 0, bytes2 = 0;
-  PropagatingCountingAlloc<T> allocator1(&bytes1);
-  PropagatingCountingAlloc<T> allocator2(&bytes2);
-  Generator<value_type> generator(1000);
-
-  // Test that we allocate properly aligned memory. If we don't, then Layout
-  // will assert fail.
-  auto unused1 = allocator1.allocate(1);
-  auto unused2 = allocator2.allocate(1);
-
-  // Test copy assignment
-  {
-    T b1(typename T::key_compare(), allocator1);
-    T b2(typename T::key_compare(), allocator2);
-
-    int64_t original_bytes1 = bytes1;
-    b1.insert(generator(0));
-    EXPECT_GT(bytes1, original_bytes1);
-
-    // This should propagate the allocator.
-    b1 = b2;
-    EXPECT_EQ(b1.size(), 0);
-    EXPECT_EQ(b2.size(), 0);
-    EXPECT_EQ(bytes1, original_bytes1);
-
-    for (int i = 1; i < 1000; i++) {
-      b1.insert(generator(i));
-    }
-
-    // We should have allocated out of allocator2.
-    EXPECT_GT(bytes2, bytes1);
-  }
-
-  // Test move assignment
-  {
-    T b1(typename T::key_compare(), allocator1);
-    T b2(typename T::key_compare(), allocator2);
-
-    int64_t original_bytes1 = bytes1;
-    b1.insert(generator(0));
-    EXPECT_GT(bytes1, original_bytes1);
-
-    // This should propagate the allocator.
-    b1 = std::move(b2);
-    EXPECT_EQ(b1.size(), 0);
-    EXPECT_EQ(bytes1, original_bytes1);
-
-    for (int i = 1; i < 1000; i++) {
-      b1.insert(generator(i));
-    }
-
-    // We should have allocated out of allocator2.
-    EXPECT_GT(bytes2, bytes1);
-  }
-
-  // Test swap
-  {
-    T b1(typename T::key_compare(), allocator1);
-    T b2(typename T::key_compare(), allocator2);
-
-    int64_t original_bytes1 = bytes1;
-    b1.insert(generator(0));
-    EXPECT_GT(bytes1, original_bytes1);
-
-    // This should swap the allocators.
-    swap(b1, b2);
-    EXPECT_EQ(b1.size(), 0);
-    EXPECT_EQ(b2.size(), 1);
-    EXPECT_GT(bytes1, original_bytes1);
-
-    for (int i = 1; i < 1000; i++) {
-      b1.insert(generator(i));
-    }
-
-    // We should have allocated out of allocator2.
-    EXPECT_GT(bytes2, bytes1);
-  }
-
-  allocator1.deallocate(unused1, 1);
-  allocator2.deallocate(unused2, 1);
-}
-
-template <typename T>
-void BtreeMapTest() {
-  using value_type = typename T::value_type;
-  using mapped_type = typename T::mapped_type;
-
-  mapped_type m = Generator<mapped_type>(0)(0);
-  (void)m;
-
-  T b;
-
-  // Verify we can insert using operator[].
-  for (int i = 0; i < 1000; i++) {
-    value_type v = Generator<value_type>(1000)(i);
-    b[v.first] = v.second;
-  }
-  EXPECT_EQ(b.size(), 1000);
-
-  // Test whether we can use the "->" operator on iterators and
-  // reverse_iterators. This stresses the btree_map_params::pair_pointer
-  // mechanism.
-  EXPECT_EQ(b.begin()->first, Generator<value_type>(1000)(0).first);
-  EXPECT_EQ(b.begin()->second, Generator<value_type>(1000)(0).second);
-  EXPECT_EQ(b.rbegin()->first, Generator<value_type>(1000)(999).first);
-  EXPECT_EQ(b.rbegin()->second, Generator<value_type>(1000)(999).second);
-}
-
-template <typename T>
-void BtreeMultiMapTest() {
-  using mapped_type = typename T::mapped_type;
-  mapped_type m = Generator<mapped_type>(0)(0);
-  (void)m;
-}
-
-template <typename K, int N = 256>
-void SetTest() {
-  EXPECT_EQ(
-      sizeof(absl::btree_set<K>),
-      2 * sizeof(void *) + sizeof(typename absl::btree_set<K>::size_type));
-  using BtreeSet = absl::btree_set<K>;
-  using CountingBtreeSet =
-      absl::btree_set<K, std::less<K>, PropagatingCountingAlloc<K>>;
-  BtreeTest<BtreeSet, std::set<K>>();
-  BtreeAllocatorTest<CountingBtreeSet>();
-}
-
-template <typename K, int N = 256>
-void MapTest() {
-  EXPECT_EQ(
-      sizeof(absl::btree_map<K, K>),
-      2 * sizeof(void *) + sizeof(typename absl::btree_map<K, K>::size_type));
-  using BtreeMap = absl::btree_map<K, K>;
-  using CountingBtreeMap =
-      absl::btree_map<K, K, std::less<K>,
-                      PropagatingCountingAlloc<std::pair<const K, K>>>;
-  BtreeTest<BtreeMap, std::map<K, K>>();
-  BtreeAllocatorTest<CountingBtreeMap>();
-  BtreeMapTest<BtreeMap>();
-}
-
-TEST(Btree, set_int32) { SetTest<int32_t>(); }
-TEST(Btree, set_int64) { SetTest<int64_t>(); }
-TEST(Btree, set_string) { SetTest<std::string>(); }
-TEST(Btree, set_cord) { SetTest<absl::Cord>(); }
-TEST(Btree, set_pair) { SetTest<std::pair<int, int>>(); }
-TEST(Btree, map_int32) { MapTest<int32_t>(); }
-TEST(Btree, map_int64) { MapTest<int64_t>(); }
-TEST(Btree, map_string) { MapTest<std::string>(); }
-TEST(Btree, map_cord) { MapTest<absl::Cord>(); }
-TEST(Btree, map_pair) { MapTest<std::pair<int, int>>(); }
-
-template <typename K, int N = 256>
-void MultiSetTest() {
-  EXPECT_EQ(
-      sizeof(absl::btree_multiset<K>),
-      2 * sizeof(void *) + sizeof(typename absl::btree_multiset<K>::size_type));
-  using BtreeMSet = absl::btree_multiset<K>;
-  using CountingBtreeMSet =
-      absl::btree_multiset<K, std::less<K>, PropagatingCountingAlloc<K>>;
-  BtreeMultiTest<BtreeMSet, std::multiset<K>>();
-  BtreeAllocatorTest<CountingBtreeMSet>();
-}
-
-template <typename K, int N = 256>
-void MultiMapTest() {
-  EXPECT_EQ(sizeof(absl::btree_multimap<K, K>),
-            2 * sizeof(void *) +
-                sizeof(typename absl::btree_multimap<K, K>::size_type));
-  using BtreeMMap = absl::btree_multimap<K, K>;
-  using CountingBtreeMMap =
-      absl::btree_multimap<K, K, std::less<K>,
-                           PropagatingCountingAlloc<std::pair<const K, K>>>;
-  BtreeMultiTest<BtreeMMap, std::multimap<K, K>>();
-  BtreeMultiMapTest<BtreeMMap>();
-  BtreeAllocatorTest<CountingBtreeMMap>();
-}
-
-TEST(Btree, multiset_int32) { MultiSetTest<int32_t>(); }
-TEST(Btree, multiset_int64) { MultiSetTest<int64_t>(); }
-TEST(Btree, multiset_string) { MultiSetTest<std::string>(); }
-TEST(Btree, multiset_cord) { MultiSetTest<absl::Cord>(); }
-TEST(Btree, multiset_pair) { MultiSetTest<std::pair<int, int>>(); }
-TEST(Btree, multimap_int32) { MultiMapTest<int32_t>(); }
-TEST(Btree, multimap_int64) { MultiMapTest<int64_t>(); }
-TEST(Btree, multimap_string) { MultiMapTest<std::string>(); }
-TEST(Btree, multimap_cord) { MultiMapTest<absl::Cord>(); }
-TEST(Btree, multimap_pair) { MultiMapTest<std::pair<int, int>>(); }
-
-struct CompareIntToString {
-  bool operator()(const std::string &a, const std::string &b) const {
-    return a < b;
-  }
-  bool operator()(const std::string &a, int b) const {
-    return a < absl::StrCat(b);
-  }
-  bool operator()(int a, const std::string &b) const {
-    return absl::StrCat(a) < b;
-  }
-  using is_transparent = void;
-};
-
-struct NonTransparentCompare {
-  template <typename T, typename U>
-  bool operator()(const T &t, const U &u) const {
-    // Treating all comparators as transparent can cause inefficiencies (see
-    // N3657 C++ proposal). Test that for comparators without 'is_transparent'
-    // alias (like this one), we do not attempt heterogeneous lookup.
-    EXPECT_TRUE((std::is_same<T, U>()));
-    return t < u;
-  }
-};
-
-template <typename T>
-bool CanEraseWithEmptyBrace(T t, decltype(t.erase({})) *) {
-  return true;
-}
-
-template <typename T>
-bool CanEraseWithEmptyBrace(T, ...) {
-  return false;
-}
-
-template <typename T>
-void TestHeterogeneous(T table) {
-  auto lb = table.lower_bound("3");
-  EXPECT_EQ(lb, table.lower_bound(3));
-  EXPECT_NE(lb, table.lower_bound(4));
-  EXPECT_EQ(lb, table.lower_bound({"3"}));
-  EXPECT_NE(lb, table.lower_bound({}));
-
-  auto ub = table.upper_bound("3");
-  EXPECT_EQ(ub, table.upper_bound(3));
-  EXPECT_NE(ub, table.upper_bound(5));
-  EXPECT_EQ(ub, table.upper_bound({"3"}));
-  EXPECT_NE(ub, table.upper_bound({}));
-
-  auto er = table.equal_range("3");
-  EXPECT_EQ(er, table.equal_range(3));
-  EXPECT_NE(er, table.equal_range(4));
-  EXPECT_EQ(er, table.equal_range({"3"}));
-  EXPECT_NE(er, table.equal_range({}));
-
-  auto it = table.find("3");
-  EXPECT_EQ(it, table.find(3));
-  EXPECT_NE(it, table.find(4));
-  EXPECT_EQ(it, table.find({"3"}));
-  EXPECT_NE(it, table.find({}));
-
-  EXPECT_TRUE(table.contains(3));
-  EXPECT_FALSE(table.contains(4));
-  EXPECT_TRUE(table.count({"3"}));
-  EXPECT_FALSE(table.contains({}));
-
-  EXPECT_EQ(1, table.count(3));
-  EXPECT_EQ(0, table.count(4));
-  EXPECT_EQ(1, table.count({"3"}));
-  EXPECT_EQ(0, table.count({}));
-
-  auto copy = table;
-  copy.erase(3);
-  EXPECT_EQ(table.size() - 1, copy.size());
-  copy.erase(4);
-  EXPECT_EQ(table.size() - 1, copy.size());
-  copy.erase({"5"});
-  EXPECT_EQ(table.size() - 2, copy.size());
-  EXPECT_FALSE(CanEraseWithEmptyBrace(table, nullptr));
-
-  // Also run it with const T&.
-  if (std::is_class<T>()) TestHeterogeneous<const T &>(table);
-}
-
-TEST(Btree, HeterogeneousLookup) {
-  TestHeterogeneous(btree_set<std::string, CompareIntToString>{"1", "3", "5"});
-  TestHeterogeneous(btree_map<std::string, int, CompareIntToString>{
-      {"1", 1}, {"3", 3}, {"5", 5}});
-  TestHeterogeneous(
-      btree_multiset<std::string, CompareIntToString>{"1", "3", "5"});
-  TestHeterogeneous(btree_multimap<std::string, int, CompareIntToString>{
-      {"1", 1}, {"3", 3}, {"5", 5}});
-
-  // Only maps have .at()
-  btree_map<std::string, int, CompareIntToString> map{
-      {"", -1}, {"1", 1}, {"3", 3}, {"5", 5}};
-  EXPECT_EQ(1, map.at(1));
-  EXPECT_EQ(3, map.at({"3"}));
-  EXPECT_EQ(-1, map.at({}));
-  const auto &cmap = map;
-  EXPECT_EQ(1, cmap.at(1));
-  EXPECT_EQ(3, cmap.at({"3"}));
-  EXPECT_EQ(-1, cmap.at({}));
-}
-
-TEST(Btree, NoHeterogeneousLookupWithoutAlias) {
-  using StringSet = absl::btree_set<std::string, NonTransparentCompare>;
-  StringSet s;
-  ASSERT_TRUE(s.insert("hello").second);
-  ASSERT_TRUE(s.insert("world").second);
-  EXPECT_TRUE(s.end() == s.find("blah"));
-  EXPECT_TRUE(s.begin() == s.lower_bound("hello"));
-  EXPECT_EQ(1, s.count("world"));
-  EXPECT_TRUE(s.contains("hello"));
-  EXPECT_TRUE(s.contains("world"));
-  EXPECT_FALSE(s.contains("blah"));
-
-  using StringMultiSet =
-      absl::btree_multiset<std::string, NonTransparentCompare>;
-  StringMultiSet ms;
-  ms.insert("hello");
-  ms.insert("world");
-  ms.insert("world");
-  EXPECT_TRUE(ms.end() == ms.find("blah"));
-  EXPECT_TRUE(ms.begin() == ms.lower_bound("hello"));
-  EXPECT_EQ(2, ms.count("world"));
-  EXPECT_TRUE(ms.contains("hello"));
-  EXPECT_TRUE(ms.contains("world"));
-  EXPECT_FALSE(ms.contains("blah"));
-}
-
-TEST(Btree, DefaultTransparent) {
-  {
-    // `int` does not have a default transparent comparator.
-    // The input value is converted to key_type.
-    btree_set<int> s = {1};
-    double d = 1.1;
-    EXPECT_EQ(s.begin(), s.find(d));
-    EXPECT_TRUE(s.contains(d));
-  }
-
-  {
-    // `std::string` has heterogeneous support.
-    btree_set<std::string> s = {"A"};
-    EXPECT_EQ(s.begin(), s.find(absl::string_view("A")));
-    EXPECT_TRUE(s.contains(absl::string_view("A")));
-  }
-}
-
-class StringLike {
- public:
-  StringLike() = default;
-
-  StringLike(const char *s) : s_(s) {  // NOLINT
-    ++constructor_calls_;
-  }
-
-  bool operator<(const StringLike &a) const { return s_ < a.s_; }
-
-  static void clear_constructor_call_count() { constructor_calls_ = 0; }
-
-  static int constructor_calls() { return constructor_calls_; }
-
- private:
-  static int constructor_calls_;
-  std::string s_;
-};
-
-int StringLike::constructor_calls_ = 0;
-
-TEST(Btree, HeterogeneousLookupDoesntDegradePerformance) {
-  using StringSet = absl::btree_set<StringLike>;
-  StringSet s;
-  for (int i = 0; i < 100; ++i) {
-    ASSERT_TRUE(s.insert(absl::StrCat(i).c_str()).second);
-  }
-  StringLike::clear_constructor_call_count();
-  s.find("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-
-  StringLike::clear_constructor_call_count();
-  s.contains("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-
-  StringLike::clear_constructor_call_count();
-  s.count("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-
-  StringLike::clear_constructor_call_count();
-  s.lower_bound("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-
-  StringLike::clear_constructor_call_count();
-  s.upper_bound("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-
-  StringLike::clear_constructor_call_count();
-  s.equal_range("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-
-  StringLike::clear_constructor_call_count();
-  s.erase("50");
-  ASSERT_EQ(1, StringLike::constructor_calls());
-}
-
-// Verify that swapping btrees swaps the key comparison functors and that we can
-// use non-default constructible comparators.
-struct SubstringLess {
-  SubstringLess() = delete;
-  explicit SubstringLess(int length) : n(length) {}
-  bool operator()(const std::string &a, const std::string &b) const {
-    return absl::string_view(a).substr(0, n) <
-           absl::string_view(b).substr(0, n);
-  }
-  int n;
-};
-
-TEST(Btree, SwapKeyCompare) {
-  using SubstringSet = absl::btree_set<std::string, SubstringLess>;
-  SubstringSet s1(SubstringLess(1), SubstringSet::allocator_type());
-  SubstringSet s2(SubstringLess(2), SubstringSet::allocator_type());
-
-  ASSERT_TRUE(s1.insert("a").second);
-  ASSERT_FALSE(s1.insert("aa").second);
-
-  ASSERT_TRUE(s2.insert("a").second);
-  ASSERT_TRUE(s2.insert("aa").second);
-  ASSERT_FALSE(s2.insert("aaa").second);
-
-  swap(s1, s2);
-
-  ASSERT_TRUE(s1.insert("b").second);
-  ASSERT_TRUE(s1.insert("bb").second);
-  ASSERT_FALSE(s1.insert("bbb").second);
-
-  ASSERT_TRUE(s2.insert("b").second);
-  ASSERT_FALSE(s2.insert("bb").second);
-}
-
-TEST(Btree, UpperBoundRegression) {
-  // Regress a bug where upper_bound would default-construct a new key_compare
-  // instead of copying the existing one.
-  using SubstringSet = absl::btree_set<std::string, SubstringLess>;
-  SubstringSet my_set(SubstringLess(3));
-  my_set.insert("aab");
-  my_set.insert("abb");
-  // We call upper_bound("aaa").  If this correctly uses the length 3
-  // comparator, aaa < aab < abb, so we should get aab as the result.
-  // If it instead uses the default-constructed length 2 comparator,
-  // aa == aa < ab, so we'll get abb as our result.
-  SubstringSet::iterator it = my_set.upper_bound("aaa");
-  ASSERT_TRUE(it != my_set.end());
-  EXPECT_EQ("aab", *it);
-}
-
-TEST(Btree, Comparison) {
-  const int kSetSize = 1201;
-  absl::btree_set<int64_t> my_set;
-  for (int i = 0; i < kSetSize; ++i) {
-    my_set.insert(i);
-  }
-  absl::btree_set<int64_t> my_set_copy(my_set);
-  EXPECT_TRUE(my_set_copy == my_set);
-  EXPECT_TRUE(my_set == my_set_copy);
-  EXPECT_FALSE(my_set_copy != my_set);
-  EXPECT_FALSE(my_set != my_set_copy);
-
-  my_set.insert(kSetSize);
-  EXPECT_FALSE(my_set_copy == my_set);
-  EXPECT_FALSE(my_set == my_set_copy);
-  EXPECT_TRUE(my_set_copy != my_set);
-  EXPECT_TRUE(my_set != my_set_copy);
-
-  my_set.erase(kSetSize - 1);
-  EXPECT_FALSE(my_set_copy == my_set);
-  EXPECT_FALSE(my_set == my_set_copy);
-  EXPECT_TRUE(my_set_copy != my_set);
-  EXPECT_TRUE(my_set != my_set_copy);
-
-  absl::btree_map<std::string, int64_t> my_map;
-  for (int i = 0; i < kSetSize; ++i) {
-    my_map[std::string(i, 'a')] = i;
-  }
-  absl::btree_map<std::string, int64_t> my_map_copy(my_map);
-  EXPECT_TRUE(my_map_copy == my_map);
-  EXPECT_TRUE(my_map == my_map_copy);
-  EXPECT_FALSE(my_map_copy != my_map);
-  EXPECT_FALSE(my_map != my_map_copy);
-
-  ++my_map_copy[std::string(7, 'a')];
-  EXPECT_FALSE(my_map_copy == my_map);
-  EXPECT_FALSE(my_map == my_map_copy);
-  EXPECT_TRUE(my_map_copy != my_map);
-  EXPECT_TRUE(my_map != my_map_copy);
-
-  my_map_copy = my_map;
-  my_map["hello"] = kSetSize;
-  EXPECT_FALSE(my_map_copy == my_map);
-  EXPECT_FALSE(my_map == my_map_copy);
-  EXPECT_TRUE(my_map_copy != my_map);
-  EXPECT_TRUE(my_map != my_map_copy);
-
-  my_map.erase(std::string(kSetSize - 1, 'a'));
-  EXPECT_FALSE(my_map_copy == my_map);
-  EXPECT_FALSE(my_map == my_map_copy);
-  EXPECT_TRUE(my_map_copy != my_map);
-  EXPECT_TRUE(my_map != my_map_copy);
-}
-
-TEST(Btree, RangeCtorSanity) {
-  std::vector<int> ivec;
-  ivec.push_back(1);
-  std::map<int, int> imap;
-  imap.insert(std::make_pair(1, 2));
-  absl::btree_multiset<int> tmset(ivec.begin(), ivec.end());
-  absl::btree_multimap<int, int> tmmap(imap.begin(), imap.end());
-  absl::btree_set<int> tset(ivec.begin(), ivec.end());
-  absl::btree_map<int, int> tmap(imap.begin(), imap.end());
-  EXPECT_EQ(1, tmset.size());
-  EXPECT_EQ(1, tmmap.size());
-  EXPECT_EQ(1, tset.size());
-  EXPECT_EQ(1, tmap.size());
-}
-
-}  // namespace
-
-class BtreeNodePeer {
- public:
-  // Yields the size of a leaf node with a specific number of values.
-  template <typename ValueType>
-  constexpr static size_t GetTargetNodeSize(size_t target_values_per_node) {
-    return btree_node<
-        set_params<ValueType, std::less<ValueType>, std::allocator<ValueType>,
-                   /*TargetNodeSize=*/256,  // This parameter isn't used here.
-                   /*Multi=*/false>>::SizeWithNValues(target_values_per_node);
-  }
-
-  // Yields the number of values in a (non-root) leaf node for this btree.
-  template <typename Btree>
-  constexpr static size_t GetNumValuesPerNode() {
-    return btree_node<typename Btree::params_type>::kNodeValues;
-  }
-
-  template <typename Btree>
-  constexpr static size_t GetMaxFieldType() {
-    return std::numeric_limits<
-        typename btree_node<typename Btree::params_type>::field_type>::max();
-  }
-
-  template <typename Btree>
-  constexpr static bool UsesLinearNodeSearch() {
-    return btree_node<typename Btree::params_type>::use_linear_search::value;
-  }
-};
-
-namespace {
-
-class BtreeMapTest : public ::testing::Test {
- public:
-  struct Key {};
-  struct Cmp {
-    template <typename T>
-    bool operator()(T, T) const {
-      return false;
-    }
-  };
-
-  struct KeyLin {
-    using absl_btree_prefer_linear_node_search = std::true_type;
-  };
-  struct CmpLin : Cmp {
-    using absl_btree_prefer_linear_node_search = std::true_type;
-  };
-
-  struct KeyBin {
-    using absl_btree_prefer_linear_node_search = std::false_type;
-  };
-  struct CmpBin : Cmp {
-    using absl_btree_prefer_linear_node_search = std::false_type;
-  };
-
-  template <typename K, typename C>
-  static bool IsLinear() {
-    return BtreeNodePeer::UsesLinearNodeSearch<absl::btree_map<K, int, C>>();
-  }
-};
-
-TEST_F(BtreeMapTest, TestLinearSearchPreferredForKeyLinearViaAlias) {
-  // Test requesting linear search by directly exporting an alias.
-  EXPECT_FALSE((IsLinear<Key, Cmp>()));
-  EXPECT_TRUE((IsLinear<KeyLin, Cmp>()));
-  EXPECT_TRUE((IsLinear<Key, CmpLin>()));
-  EXPECT_TRUE((IsLinear<KeyLin, CmpLin>()));
-}
-
-TEST_F(BtreeMapTest, LinearChoiceTree) {
-  // Cmp has precedence, and is forcing binary
-  EXPECT_FALSE((IsLinear<Key, CmpBin>()));
-  EXPECT_FALSE((IsLinear<KeyLin, CmpBin>()));
-  EXPECT_FALSE((IsLinear<KeyBin, CmpBin>()));
-  EXPECT_FALSE((IsLinear<int, CmpBin>()));
-  EXPECT_FALSE((IsLinear<std::string, CmpBin>()));
-  // Cmp has precedence, and is forcing linear
-  EXPECT_TRUE((IsLinear<Key, CmpLin>()));
-  EXPECT_TRUE((IsLinear<KeyLin, CmpLin>()));
-  EXPECT_TRUE((IsLinear<KeyBin, CmpLin>()));
-  EXPECT_TRUE((IsLinear<int, CmpLin>()));
-  EXPECT_TRUE((IsLinear<std::string, CmpLin>()));
-  // Cmp has no preference, Key determines linear vs binary.
-  EXPECT_FALSE((IsLinear<Key, Cmp>()));
-  EXPECT_TRUE((IsLinear<KeyLin, Cmp>()));
-  EXPECT_FALSE((IsLinear<KeyBin, Cmp>()));
-  // arithmetic key w/ std::less or std::greater: linear
-  EXPECT_TRUE((IsLinear<int, std::less<int>>()));
-  EXPECT_TRUE((IsLinear<double, std::greater<double>>()));
-  // arithmetic key w/ custom compare: binary
-  EXPECT_FALSE((IsLinear<int, Cmp>()));
-  // non-arithmetic key: binary
-  EXPECT_FALSE((IsLinear<std::string, std::less<std::string>>()));
-}
-
-TEST(Btree, BtreeMapCanHoldMoveOnlyTypes) {
-  absl::btree_map<std::string, std::unique_ptr<std::string>> m;
-
-  std::unique_ptr<std::string> &v = m["A"];
-  EXPECT_TRUE(v == nullptr);
-  v.reset(new std::string("X"));
-
-  auto iter = m.find("A");
-  EXPECT_EQ("X", *iter->second);
-}
-
-TEST(Btree, InitializerListConstructor) {
-  absl::btree_set<std::string> set({"a", "b"});
-  EXPECT_EQ(set.count("a"), 1);
-  EXPECT_EQ(set.count("b"), 1);
-
-  absl::btree_multiset<int> mset({1, 1, 4});
-  EXPECT_EQ(mset.count(1), 2);
-  EXPECT_EQ(mset.count(4), 1);
-
-  absl::btree_map<int, int> map({{1, 5}, {2, 10}});
-  EXPECT_EQ(map[1], 5);
-  EXPECT_EQ(map[2], 10);
-
-  absl::btree_multimap<int, int> mmap({{1, 5}, {1, 10}});
-  auto range = mmap.equal_range(1);
-  auto it = range.first;
-  ASSERT_NE(it, range.second);
-  EXPECT_EQ(it->second, 5);
-  ASSERT_NE(++it, range.second);
-  EXPECT_EQ(it->second, 10);
-  EXPECT_EQ(++it, range.second);
-}
-
-TEST(Btree, InitializerListInsert) {
-  absl::btree_set<std::string> set;
-  set.insert({"a", "b"});
-  EXPECT_EQ(set.count("a"), 1);
-  EXPECT_EQ(set.count("b"), 1);
-
-  absl::btree_multiset<int> mset;
-  mset.insert({1, 1, 4});
-  EXPECT_EQ(mset.count(1), 2);
-  EXPECT_EQ(mset.count(4), 1);
-
-  absl::btree_map<int, int> map;
-  map.insert({{1, 5}, {2, 10}});
-  // Test that inserting one element using an initializer list also works.
-  map.insert({3, 15});
-  EXPECT_EQ(map[1], 5);
-  EXPECT_EQ(map[2], 10);
-  EXPECT_EQ(map[3], 15);
-
-  absl::btree_multimap<int, int> mmap;
-  mmap.insert({{1, 5}, {1, 10}});
-  auto range = mmap.equal_range(1);
-  auto it = range.first;
-  ASSERT_NE(it, range.second);
-  EXPECT_EQ(it->second, 5);
-  ASSERT_NE(++it, range.second);
-  EXPECT_EQ(it->second, 10);
-  EXPECT_EQ(++it, range.second);
-}
-
-template <typename Compare, typename K>
-void AssertKeyCompareToAdapted() {
-  using Adapted = typename key_compare_to_adapter<Compare>::type;
-  static_assert(!std::is_same<Adapted, Compare>::value,
-                "key_compare_to_adapter should have adapted this comparator.");
-  static_assert(
-      std::is_same<absl::weak_ordering,
-                   absl::result_of_t<Adapted(const K &, const K &)>>::value,
-      "Adapted comparator should be a key-compare-to comparator.");
-}
-template <typename Compare, typename K>
-void AssertKeyCompareToNotAdapted() {
-  using Unadapted = typename key_compare_to_adapter<Compare>::type;
-  static_assert(
-      std::is_same<Unadapted, Compare>::value,
-      "key_compare_to_adapter shouldn't have adapted this comparator.");
-  static_assert(
-      std::is_same<bool,
-                   absl::result_of_t<Unadapted(const K &, const K &)>>::value,
-      "Un-adapted comparator should return bool.");
-}
-
-TEST(Btree, KeyCompareToAdapter) {
-  AssertKeyCompareToAdapted<std::less<std::string>, std::string>();
-  AssertKeyCompareToAdapted<std::greater<std::string>, std::string>();
-  AssertKeyCompareToAdapted<std::less<absl::string_view>, absl::string_view>();
-  AssertKeyCompareToAdapted<std::greater<absl::string_view>,
-                            absl::string_view>();
-  AssertKeyCompareToAdapted<std::less<absl::Cord>, absl::Cord>();
-  AssertKeyCompareToAdapted<std::greater<absl::Cord>, absl::Cord>();
-  AssertKeyCompareToNotAdapted<std::less<int>, int>();
-  AssertKeyCompareToNotAdapted<std::greater<int>, int>();
-}
-
-TEST(Btree, RValueInsert) {
-  InstanceTracker tracker;
-
-  absl::btree_set<MovableOnlyInstance> set;
-  set.insert(MovableOnlyInstance(1));
-  set.insert(MovableOnlyInstance(3));
-  MovableOnlyInstance two(2);
-  set.insert(set.find(MovableOnlyInstance(3)), std::move(two));
-  auto it = set.find(MovableOnlyInstance(2));
-  ASSERT_NE(it, set.end());
-  ASSERT_NE(++it, set.end());
-  EXPECT_EQ(it->value(), 3);
-
-  absl::btree_multiset<MovableOnlyInstance> mset;
-  MovableOnlyInstance zero(0);
-  MovableOnlyInstance zero2(0);
-  mset.insert(std::move(zero));
-  mset.insert(mset.find(MovableOnlyInstance(0)), std::move(zero2));
-  EXPECT_EQ(mset.count(MovableOnlyInstance(0)), 2);
-
-  absl::btree_map<int, MovableOnlyInstance> map;
-  std::pair<const int, MovableOnlyInstance> p1 = {1, MovableOnlyInstance(5)};
-  std::pair<const int, MovableOnlyInstance> p2 = {2, MovableOnlyInstance(10)};
-  std::pair<const int, MovableOnlyInstance> p3 = {3, MovableOnlyInstance(15)};
-  map.insert(std::move(p1));
-  map.insert(std::move(p3));
-  map.insert(map.find(3), std::move(p2));
-  ASSERT_NE(map.find(2), map.end());
-  EXPECT_EQ(map.find(2)->second.value(), 10);
-
-  absl::btree_multimap<int, MovableOnlyInstance> mmap;
-  std::pair<const int, MovableOnlyInstance> p4 = {1, MovableOnlyInstance(5)};
-  std::pair<const int, MovableOnlyInstance> p5 = {1, MovableOnlyInstance(10)};
-  mmap.insert(std::move(p4));
-  mmap.insert(mmap.find(1), std::move(p5));
-  auto range = mmap.equal_range(1);
-  auto it1 = range.first;
-  ASSERT_NE(it1, range.second);
-  EXPECT_EQ(it1->second.value(), 10);
-  ASSERT_NE(++it1, range.second);
-  EXPECT_EQ(it1->second.value(), 5);
-  EXPECT_EQ(++it1, range.second);
-
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.swaps(), 0);
-}
-
-// A btree set with a specific number of values per node.
-template <typename Key, int TargetValuesPerNode, typename Cmp = std::less<Key>>
-class SizedBtreeSet
-    : public btree_set_container<btree<
-          set_params<Key, Cmp, std::allocator<Key>,
-                     BtreeNodePeer::GetTargetNodeSize<Key>(TargetValuesPerNode),
-                     /*Multi=*/false>>> {
-  using Base = typename SizedBtreeSet::btree_set_container;
-
- public:
-  SizedBtreeSet() {}
-  using Base::Base;
-};
-
-template <typename Set>
-void ExpectOperationCounts(const int expected_moves,
-                           const int expected_comparisons,
-                           const std::vector<int> &values,
-                           InstanceTracker *tracker, Set *set) {
-  for (const int v : values) set->insert(MovableOnlyInstance(v));
-  set->clear();
-  EXPECT_EQ(tracker->moves(), expected_moves);
-  EXPECT_EQ(tracker->comparisons(), expected_comparisons);
-  EXPECT_EQ(tracker->copies(), 0);
-  EXPECT_EQ(tracker->swaps(), 0);
-  tracker->ResetCopiesMovesSwaps();
-}
-
-// Note: when the values in this test change, it is expected to have an impact
-// on performance.
-TEST(Btree, MovesComparisonsCopiesSwapsTracking) {
-  InstanceTracker tracker;
-  // Note: this is minimum number of values per node.
-  SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/3> set3;
-  // Note: this is the default number of values per node for a set of int32s
-  // (with 64-bit pointers).
-  SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/61> set61;
-  SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/100> set100;
-
-  // Don't depend on flags for random values because then the expectations will
-  // fail if the flags change.
-  std::vector<int> values =
-      GenerateValuesWithSeed<int>(10000, 1 << 22, /*seed=*/23);
-
-  EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set3)>(), 3);
-  EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>(), 61);
-  EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set100)>(), 100);
-  if (sizeof(void *) == 8) {
-    EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<absl::btree_set<int32_t>>(),
-              BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>());
-  }
-
-  // Test key insertion/deletion in random order.
-  ExpectOperationCounts(45281, 132551, values, &tracker, &set3);
-  ExpectOperationCounts(386718, 129807, values, &tracker, &set61);
-  ExpectOperationCounts(586761, 130310, values, &tracker, &set100);
-
-  // Test key insertion/deletion in sorted order.
-  std::sort(values.begin(), values.end());
-  ExpectOperationCounts(26638, 92134, values, &tracker, &set3);
-  ExpectOperationCounts(20208, 87757, values, &tracker, &set61);
-  ExpectOperationCounts(20124, 96583, values, &tracker, &set100);
-
-  // Test key insertion/deletion in reverse sorted order.
-  std::reverse(values.begin(), values.end());
-  ExpectOperationCounts(49951, 119325, values, &tracker, &set3);
-  ExpectOperationCounts(338813, 118266, values, &tracker, &set61);
-  ExpectOperationCounts(534529, 125279, values, &tracker, &set100);
-}
-
-struct MovableOnlyInstanceThreeWayCompare {
-  absl::weak_ordering operator()(const MovableOnlyInstance &a,
-                                 const MovableOnlyInstance &b) const {
-    return a.compare(b);
-  }
-};
-
-// Note: when the values in this test change, it is expected to have an impact
-// on performance.
-TEST(Btree, MovesComparisonsCopiesSwapsTrackingThreeWayCompare) {
-  InstanceTracker tracker;
-  // Note: this is minimum number of values per node.
-  SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/3,
-                MovableOnlyInstanceThreeWayCompare>
-      set3;
-  // Note: this is the default number of values per node for a set of int32s
-  // (with 64-bit pointers).
-  SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/61,
-                MovableOnlyInstanceThreeWayCompare>
-      set61;
-  SizedBtreeSet<MovableOnlyInstance, /*TargetValuesPerNode=*/100,
-                MovableOnlyInstanceThreeWayCompare>
-      set100;
-
-  // Don't depend on flags for random values because then the expectations will
-  // fail if the flags change.
-  std::vector<int> values =
-      GenerateValuesWithSeed<int>(10000, 1 << 22, /*seed=*/23);
-
-  EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set3)>(), 3);
-  EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>(), 61);
-  EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<decltype(set100)>(), 100);
-  if (sizeof(void *) == 8) {
-    EXPECT_EQ(BtreeNodePeer::GetNumValuesPerNode<absl::btree_set<int32_t>>(),
-              BtreeNodePeer::GetNumValuesPerNode<decltype(set61)>());
-  }
-
-  // Test key insertion/deletion in random order.
-  ExpectOperationCounts(45281, 122560, values, &tracker, &set3);
-  ExpectOperationCounts(386718, 119816, values, &tracker, &set61);
-  ExpectOperationCounts(586761, 120319, values, &tracker, &set100);
-
-  // Test key insertion/deletion in sorted order.
-  std::sort(values.begin(), values.end());
-  ExpectOperationCounts(26638, 92134, values, &tracker, &set3);
-  ExpectOperationCounts(20208, 87757, values, &tracker, &set61);
-  ExpectOperationCounts(20124, 96583, values, &tracker, &set100);
-
-  // Test key insertion/deletion in reverse sorted order.
-  std::reverse(values.begin(), values.end());
-  ExpectOperationCounts(49951, 109326, values, &tracker, &set3);
-  ExpectOperationCounts(338813, 108267, values, &tracker, &set61);
-  ExpectOperationCounts(534529, 115280, values, &tracker, &set100);
-}
-
-struct NoDefaultCtor {
-  int num;
-  explicit NoDefaultCtor(int i) : num(i) {}
-
-  friend bool operator<(const NoDefaultCtor &a, const NoDefaultCtor &b) {
-    return a.num < b.num;
-  }
-};
-
-TEST(Btree, BtreeMapCanHoldNoDefaultCtorTypes) {
-  absl::btree_map<NoDefaultCtor, NoDefaultCtor> m;
-
-  for (int i = 1; i <= 99; ++i) {
-    SCOPED_TRACE(i);
-    EXPECT_TRUE(m.emplace(NoDefaultCtor(i), NoDefaultCtor(100 - i)).second);
-  }
-  EXPECT_FALSE(m.emplace(NoDefaultCtor(78), NoDefaultCtor(0)).second);
-
-  auto iter99 = m.find(NoDefaultCtor(99));
-  ASSERT_NE(iter99, m.end());
-  EXPECT_EQ(iter99->second.num, 1);
-
-  auto iter1 = m.find(NoDefaultCtor(1));
-  ASSERT_NE(iter1, m.end());
-  EXPECT_EQ(iter1->second.num, 99);
-
-  auto iter50 = m.find(NoDefaultCtor(50));
-  ASSERT_NE(iter50, m.end());
-  EXPECT_EQ(iter50->second.num, 50);
-
-  auto iter25 = m.find(NoDefaultCtor(25));
-  ASSERT_NE(iter25, m.end());
-  EXPECT_EQ(iter25->second.num, 75);
-}
-
-TEST(Btree, BtreeMultimapCanHoldNoDefaultCtorTypes) {
-  absl::btree_multimap<NoDefaultCtor, NoDefaultCtor> m;
-
-  for (int i = 1; i <= 99; ++i) {
-    SCOPED_TRACE(i);
-    m.emplace(NoDefaultCtor(i), NoDefaultCtor(100 - i));
-  }
-
-  auto iter99 = m.find(NoDefaultCtor(99));
-  ASSERT_NE(iter99, m.end());
-  EXPECT_EQ(iter99->second.num, 1);
-
-  auto iter1 = m.find(NoDefaultCtor(1));
-  ASSERT_NE(iter1, m.end());
-  EXPECT_EQ(iter1->second.num, 99);
-
-  auto iter50 = m.find(NoDefaultCtor(50));
-  ASSERT_NE(iter50, m.end());
-  EXPECT_EQ(iter50->second.num, 50);
-
-  auto iter25 = m.find(NoDefaultCtor(25));
-  ASSERT_NE(iter25, m.end());
-  EXPECT_EQ(iter25->second.num, 75);
-}
-
-TEST(Btree, MapAt) {
-  absl::btree_map<int, int> map = {{1, 2}, {2, 4}};
-  EXPECT_EQ(map.at(1), 2);
-  EXPECT_EQ(map.at(2), 4);
-  map.at(2) = 8;
-  const absl::btree_map<int, int> &const_map = map;
-  EXPECT_EQ(const_map.at(1), 2);
-  EXPECT_EQ(const_map.at(2), 8);
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW(map.at(3), std::out_of_range);
-#else
-  EXPECT_DEATH_IF_SUPPORTED(map.at(3), "absl::btree_map::at");
-#endif
-}
-
-TEST(Btree, BtreeMultisetEmplace) {
-  const int value_to_insert = 123456;
-  absl::btree_multiset<int> s;
-  auto iter = s.emplace(value_to_insert);
-  ASSERT_NE(iter, s.end());
-  EXPECT_EQ(*iter, value_to_insert);
-  auto iter2 = s.emplace(value_to_insert);
-  EXPECT_NE(iter2, iter);
-  ASSERT_NE(iter2, s.end());
-  EXPECT_EQ(*iter2, value_to_insert);
-  auto result = s.equal_range(value_to_insert);
-  EXPECT_EQ(std::distance(result.first, result.second), 2);
-}
-
-TEST(Btree, BtreeMultisetEmplaceHint) {
-  const int value_to_insert = 123456;
-  absl::btree_multiset<int> s;
-  auto iter = s.emplace(value_to_insert);
-  ASSERT_NE(iter, s.end());
-  EXPECT_EQ(*iter, value_to_insert);
-  auto emplace_iter = s.emplace_hint(iter, value_to_insert);
-  EXPECT_NE(emplace_iter, iter);
-  ASSERT_NE(emplace_iter, s.end());
-  EXPECT_EQ(*emplace_iter, value_to_insert);
-}
-
-TEST(Btree, BtreeMultimapEmplace) {
-  const int key_to_insert = 123456;
-  const char value0[] = "a";
-  absl::btree_multimap<int, std::string> s;
-  auto iter = s.emplace(key_to_insert, value0);
-  ASSERT_NE(iter, s.end());
-  EXPECT_EQ(iter->first, key_to_insert);
-  EXPECT_EQ(iter->second, value0);
-  const char value1[] = "b";
-  auto iter2 = s.emplace(key_to_insert, value1);
-  EXPECT_NE(iter2, iter);
-  ASSERT_NE(iter2, s.end());
-  EXPECT_EQ(iter2->first, key_to_insert);
-  EXPECT_EQ(iter2->second, value1);
-  auto result = s.equal_range(key_to_insert);
-  EXPECT_EQ(std::distance(result.first, result.second), 2);
-}
-
-TEST(Btree, BtreeMultimapEmplaceHint) {
-  const int key_to_insert = 123456;
-  const char value0[] = "a";
-  absl::btree_multimap<int, std::string> s;
-  auto iter = s.emplace(key_to_insert, value0);
-  ASSERT_NE(iter, s.end());
-  EXPECT_EQ(iter->first, key_to_insert);
-  EXPECT_EQ(iter->second, value0);
-  const char value1[] = "b";
-  auto emplace_iter = s.emplace_hint(iter, key_to_insert, value1);
-  EXPECT_NE(emplace_iter, iter);
-  ASSERT_NE(emplace_iter, s.end());
-  EXPECT_EQ(emplace_iter->first, key_to_insert);
-  EXPECT_EQ(emplace_iter->second, value1);
-}
-
-TEST(Btree, ConstIteratorAccessors) {
-  absl::btree_set<int> set;
-  for (int i = 0; i < 100; ++i) {
-    set.insert(i);
-  }
-
-  auto it = set.cbegin();
-  auto r_it = set.crbegin();
-  for (int i = 0; i < 100; ++i, ++it, ++r_it) {
-    ASSERT_EQ(*it, i);
-    ASSERT_EQ(*r_it, 99 - i);
-  }
-  EXPECT_EQ(it, set.cend());
-  EXPECT_EQ(r_it, set.crend());
-}
-
-TEST(Btree, StrSplitCompatible) {
-  const absl::btree_set<std::string> split_set = absl::StrSplit("a,b,c", ',');
-  const absl::btree_set<std::string> expected_set = {"a", "b", "c"};
-
-  EXPECT_EQ(split_set, expected_set);
-}
-
-// We can't use EXPECT_EQ/etc. to compare absl::weak_ordering because they
-// convert literal 0 to int and absl::weak_ordering can only be compared with
-// literal 0. Defining this function allows for avoiding ClangTidy warnings.
-bool Identity(const bool b) { return b; }
-
-TEST(Btree, ValueComp) {
-  absl::btree_set<int> s;
-  EXPECT_TRUE(s.value_comp()(1, 2));
-  EXPECT_FALSE(s.value_comp()(2, 2));
-  EXPECT_FALSE(s.value_comp()(2, 1));
-
-  absl::btree_map<int, int> m1;
-  EXPECT_TRUE(m1.value_comp()(std::make_pair(1, 0), std::make_pair(2, 0)));
-  EXPECT_FALSE(m1.value_comp()(std::make_pair(2, 0), std::make_pair(2, 0)));
-  EXPECT_FALSE(m1.value_comp()(std::make_pair(2, 0), std::make_pair(1, 0)));
-
-  absl::btree_map<std::string, int> m2;
-  EXPECT_TRUE(Identity(
-      m2.value_comp()(std::make_pair("a", 0), std::make_pair("b", 0)) < 0));
-  EXPECT_TRUE(Identity(
-      m2.value_comp()(std::make_pair("b", 0), std::make_pair("b", 0)) == 0));
-  EXPECT_TRUE(Identity(
-      m2.value_comp()(std::make_pair("b", 0), std::make_pair("a", 0)) > 0));
-}
-
-TEST(Btree, DefaultConstruction) {
-  absl::btree_set<int> s;
-  absl::btree_map<int, int> m;
-  absl::btree_multiset<int> ms;
-  absl::btree_multimap<int, int> mm;
-
-  EXPECT_TRUE(s.empty());
-  EXPECT_TRUE(m.empty());
-  EXPECT_TRUE(ms.empty());
-  EXPECT_TRUE(mm.empty());
-}
-
-TEST(Btree, SwissTableHashable) {
-  static constexpr int kValues = 10000;
-  std::vector<int> values(kValues);
-  std::iota(values.begin(), values.end(), 0);
-  std::vector<std::pair<int, int>> map_values;
-  for (int v : values) map_values.emplace_back(v, -v);
-
-  using set = absl::btree_set<int>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly({
-      set{},
-      set{1},
-      set{2},
-      set{1, 2},
-      set{2, 1},
-      set(values.begin(), values.end()),
-      set(values.rbegin(), values.rend()),
-  }));
-
-  using mset = absl::btree_multiset<int>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly({
-      mset{},
-      mset{1},
-      mset{1, 1},
-      mset{2},
-      mset{2, 2},
-      mset{1, 2},
-      mset{1, 1, 2},
-      mset{1, 2, 2},
-      mset{1, 1, 2, 2},
-      mset(values.begin(), values.end()),
-      mset(values.rbegin(), values.rend()),
-  }));
-
-  using map = absl::btree_map<int, int>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly({
-      map{},
-      map{{1, 0}},
-      map{{1, 1}},
-      map{{2, 0}},
-      map{{2, 2}},
-      map{{1, 0}, {2, 1}},
-      map(map_values.begin(), map_values.end()),
-      map(map_values.rbegin(), map_values.rend()),
-  }));
-
-  using mmap = absl::btree_multimap<int, int>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly({
-      mmap{},
-      mmap{{1, 0}},
-      mmap{{1, 1}},
-      mmap{{1, 0}, {1, 1}},
-      mmap{{1, 1}, {1, 0}},
-      mmap{{2, 0}},
-      mmap{{2, 2}},
-      mmap{{1, 0}, {2, 1}},
-      mmap(map_values.begin(), map_values.end()),
-      mmap(map_values.rbegin(), map_values.rend()),
-  }));
-}
-
-TEST(Btree, ComparableSet) {
-  absl::btree_set<int> s1 = {1, 2};
-  absl::btree_set<int> s2 = {2, 3};
-  EXPECT_LT(s1, s2);
-  EXPECT_LE(s1, s2);
-  EXPECT_LE(s1, s1);
-  EXPECT_GT(s2, s1);
-  EXPECT_GE(s2, s1);
-  EXPECT_GE(s1, s1);
-}
-
-TEST(Btree, ComparableSetsDifferentLength) {
-  absl::btree_set<int> s1 = {1, 2};
-  absl::btree_set<int> s2 = {1, 2, 3};
-  EXPECT_LT(s1, s2);
-  EXPECT_LE(s1, s2);
-  EXPECT_GT(s2, s1);
-  EXPECT_GE(s2, s1);
-}
-
-TEST(Btree, ComparableMultiset) {
-  absl::btree_multiset<int> s1 = {1, 2};
-  absl::btree_multiset<int> s2 = {2, 3};
-  EXPECT_LT(s1, s2);
-  EXPECT_LE(s1, s2);
-  EXPECT_LE(s1, s1);
-  EXPECT_GT(s2, s1);
-  EXPECT_GE(s2, s1);
-  EXPECT_GE(s1, s1);
-}
-
-TEST(Btree, ComparableMap) {
-  absl::btree_map<int, int> s1 = {{1, 2}};
-  absl::btree_map<int, int> s2 = {{2, 3}};
-  EXPECT_LT(s1, s2);
-  EXPECT_LE(s1, s2);
-  EXPECT_LE(s1, s1);
-  EXPECT_GT(s2, s1);
-  EXPECT_GE(s2, s1);
-  EXPECT_GE(s1, s1);
-}
-
-TEST(Btree, ComparableMultimap) {
-  absl::btree_multimap<int, int> s1 = {{1, 2}};
-  absl::btree_multimap<int, int> s2 = {{2, 3}};
-  EXPECT_LT(s1, s2);
-  EXPECT_LE(s1, s2);
-  EXPECT_LE(s1, s1);
-  EXPECT_GT(s2, s1);
-  EXPECT_GE(s2, s1);
-  EXPECT_GE(s1, s1);
-}
-
-TEST(Btree, ComparableSetWithCustomComparator) {
-  // As specified by
-  // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf section
-  // [container.requirements.general].12, ordering associative containers always
-  // uses default '<' operator
-  // - even if otherwise the container uses custom functor.
-  absl::btree_set<int, std::greater<int>> s1 = {1, 2};
-  absl::btree_set<int, std::greater<int>> s2 = {2, 3};
-  EXPECT_LT(s1, s2);
-  EXPECT_LE(s1, s2);
-  EXPECT_LE(s1, s1);
-  EXPECT_GT(s2, s1);
-  EXPECT_GE(s2, s1);
-  EXPECT_GE(s1, s1);
-}
-
-TEST(Btree, EraseReturnsIterator) {
-  absl::btree_set<int> set = {1, 2, 3, 4, 5};
-  auto result_it = set.erase(set.begin(), set.find(3));
-  EXPECT_EQ(result_it, set.find(3));
-  result_it = set.erase(set.find(5));
-  EXPECT_EQ(result_it, set.end());
-}
-
-TEST(Btree, ExtractAndInsertNodeHandleSet) {
-  absl::btree_set<int> src1 = {1, 2, 3, 4, 5};
-  auto nh = src1.extract(src1.find(3));
-  EXPECT_THAT(src1, ElementsAre(1, 2, 4, 5));
-  absl::btree_set<int> other;
-  absl::btree_set<int>::insert_return_type res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(3));
-  EXPECT_EQ(res.position, other.find(3));
-  EXPECT_TRUE(res.inserted);
-  EXPECT_TRUE(res.node.empty());
-
-  absl::btree_set<int> src2 = {3, 4};
-  nh = src2.extract(src2.find(3));
-  EXPECT_THAT(src2, ElementsAre(4));
-  res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(3));
-  EXPECT_EQ(res.position, other.find(3));
-  EXPECT_FALSE(res.inserted);
-  ASSERT_FALSE(res.node.empty());
-  EXPECT_EQ(res.node.value(), 3);
-}
-
-template <typename Set>
-void TestExtractWithTrackingForSet() {
-  InstanceTracker tracker;
-  {
-    Set s;
-    // Add enough elements to make sure we test internal nodes too.
-    const size_t kSize = 1000;
-    while (s.size() < kSize) {
-      s.insert(MovableOnlyInstance(s.size()));
-    }
-    for (int i = 0; i < kSize; ++i) {
-      // Extract with key
-      auto nh = s.extract(MovableOnlyInstance(i));
-      EXPECT_EQ(s.size(), kSize - 1);
-      EXPECT_EQ(nh.value().value(), i);
-      // Insert with node
-      s.insert(std::move(nh));
-      EXPECT_EQ(s.size(), kSize);
-
-      // Extract with iterator
-      auto it = s.find(MovableOnlyInstance(i));
-      nh = s.extract(it);
-      EXPECT_EQ(s.size(), kSize - 1);
-      EXPECT_EQ(nh.value().value(), i);
-      // Insert with node and hint
-      s.insert(s.begin(), std::move(nh));
-      EXPECT_EQ(s.size(), kSize);
-    }
-  }
-  EXPECT_EQ(0, tracker.instances());
-}
-
-template <typename Map>
-void TestExtractWithTrackingForMap() {
-  InstanceTracker tracker;
-  {
-    Map m;
-    // Add enough elements to make sure we test internal nodes too.
-    const size_t kSize = 1000;
-    while (m.size() < kSize) {
-      m.insert(
-          {CopyableMovableInstance(m.size()), MovableOnlyInstance(m.size())});
-    }
-    for (int i = 0; i < kSize; ++i) {
-      // Extract with key
-      auto nh = m.extract(CopyableMovableInstance(i));
-      EXPECT_EQ(m.size(), kSize - 1);
-      EXPECT_EQ(nh.key().value(), i);
-      EXPECT_EQ(nh.mapped().value(), i);
-      // Insert with node
-      m.insert(std::move(nh));
-      EXPECT_EQ(m.size(), kSize);
-
-      // Extract with iterator
-      auto it = m.find(CopyableMovableInstance(i));
-      nh = m.extract(it);
-      EXPECT_EQ(m.size(), kSize - 1);
-      EXPECT_EQ(nh.key().value(), i);
-      EXPECT_EQ(nh.mapped().value(), i);
-      // Insert with node and hint
-      m.insert(m.begin(), std::move(nh));
-      EXPECT_EQ(m.size(), kSize);
-    }
-  }
-  EXPECT_EQ(0, tracker.instances());
-}
-
-TEST(Btree, ExtractTracking) {
-  TestExtractWithTrackingForSet<absl::btree_set<MovableOnlyInstance>>();
-  TestExtractWithTrackingForSet<absl::btree_multiset<MovableOnlyInstance>>();
-  TestExtractWithTrackingForMap<
-      absl::btree_map<CopyableMovableInstance, MovableOnlyInstance>>();
-  TestExtractWithTrackingForMap<
-      absl::btree_multimap<CopyableMovableInstance, MovableOnlyInstance>>();
-}
-
-TEST(Btree, ExtractAndInsertNodeHandleMultiSet) {
-  absl::btree_multiset<int> src1 = {1, 2, 3, 3, 4, 5};
-  auto nh = src1.extract(src1.find(3));
-  EXPECT_THAT(src1, ElementsAre(1, 2, 3, 4, 5));
-  absl::btree_multiset<int> other;
-  auto res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(3));
-  EXPECT_EQ(res, other.find(3));
-
-  absl::btree_multiset<int> src2 = {3, 4};
-  nh = src2.extract(src2.find(3));
-  EXPECT_THAT(src2, ElementsAre(4));
-  res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(3, 3));
-  EXPECT_EQ(res, ++other.find(3));
-}
-
-TEST(Btree, ExtractAndInsertNodeHandleMap) {
-  absl::btree_map<int, int> src1 = {{1, 2}, {3, 4}, {5, 6}};
-  auto nh = src1.extract(src1.find(3));
-  EXPECT_THAT(src1, ElementsAre(Pair(1, 2), Pair(5, 6)));
-  absl::btree_map<int, int> other;
-  absl::btree_map<int, int>::insert_return_type res =
-      other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(Pair(3, 4)));
-  EXPECT_EQ(res.position, other.find(3));
-  EXPECT_TRUE(res.inserted);
-  EXPECT_TRUE(res.node.empty());
-
-  absl::btree_map<int, int> src2 = {{3, 6}};
-  nh = src2.extract(src2.find(3));
-  EXPECT_TRUE(src2.empty());
-  res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(Pair(3, 4)));
-  EXPECT_EQ(res.position, other.find(3));
-  EXPECT_FALSE(res.inserted);
-  ASSERT_FALSE(res.node.empty());
-  EXPECT_EQ(res.node.key(), 3);
-  EXPECT_EQ(res.node.mapped(), 6);
-}
-
-TEST(Btree, ExtractAndInsertNodeHandleMultiMap) {
-  absl::btree_multimap<int, int> src1 = {{1, 2}, {3, 4}, {5, 6}};
-  auto nh = src1.extract(src1.find(3));
-  EXPECT_THAT(src1, ElementsAre(Pair(1, 2), Pair(5, 6)));
-  absl::btree_multimap<int, int> other;
-  auto res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(Pair(3, 4)));
-  EXPECT_EQ(res, other.find(3));
-
-  absl::btree_multimap<int, int> src2 = {{3, 6}};
-  nh = src2.extract(src2.find(3));
-  EXPECT_TRUE(src2.empty());
-  res = other.insert(std::move(nh));
-  EXPECT_THAT(other, ElementsAre(Pair(3, 4), Pair(3, 6)));
-  EXPECT_EQ(res, ++other.begin());
-}
-
-TEST(Btree, ExtractMultiMapEquivalentKeys) {
-  // Note: using string keys means a three-way comparator.
-  absl::btree_multimap<std::string, int> map;
-  for (int i = 0; i < 100; ++i) {
-    for (int j = 0; j < 100; ++j) {
-      map.insert({absl::StrCat(i), j});
-    }
-  }
-
-  for (int i = 0; i < 100; ++i) {
-    const std::string key = absl::StrCat(i);
-    auto node_handle = map.extract(key);
-    EXPECT_EQ(node_handle.key(), key);
-    EXPECT_EQ(node_handle.mapped(), 0) << i;
-  }
-
-  for (int i = 0; i < 100; ++i) {
-    const std::string key = absl::StrCat(i);
-    auto node_handle = map.extract(key);
-    EXPECT_EQ(node_handle.key(), key);
-    EXPECT_EQ(node_handle.mapped(), 1) << i;
-  }
-}
-
-// For multisets, insert with hint also affects correctness because we need to
-// insert immediately before the hint if possible.
-struct InsertMultiHintData {
-  int key;
-  int not_key;
-  bool operator==(const InsertMultiHintData other) const {
-    return key == other.key && not_key == other.not_key;
-  }
-};
-
-struct InsertMultiHintDataKeyCompare {
-  using is_transparent = void;
-  bool operator()(const InsertMultiHintData a,
-                  const InsertMultiHintData b) const {
-    return a.key < b.key;
-  }
-  bool operator()(const int a, const InsertMultiHintData b) const {
-    return a < b.key;
-  }
-  bool operator()(const InsertMultiHintData a, const int b) const {
-    return a.key < b;
-  }
-};
-
-TEST(Btree, InsertHintNodeHandle) {
-  // For unique sets, insert with hint is just a performance optimization.
-  // Test that insert works correctly when the hint is right or wrong.
-  {
-    absl::btree_set<int> src = {1, 2, 3, 4, 5};
-    auto nh = src.extract(src.find(3));
-    EXPECT_THAT(src, ElementsAre(1, 2, 4, 5));
-    absl::btree_set<int> other = {0, 100};
-    // Test a correct hint.
-    auto it = other.insert(other.lower_bound(3), std::move(nh));
-    EXPECT_THAT(other, ElementsAre(0, 3, 100));
-    EXPECT_EQ(it, other.find(3));
-
-    nh = src.extract(src.find(5));
-    // Test an incorrect hint.
-    it = other.insert(other.end(), std::move(nh));
-    EXPECT_THAT(other, ElementsAre(0, 3, 5, 100));
-    EXPECT_EQ(it, other.find(5));
-  }
-
-  absl::btree_multiset<InsertMultiHintData, InsertMultiHintDataKeyCompare> src =
-      {{1, 2}, {3, 4}, {3, 5}};
-  auto nh = src.extract(src.lower_bound(3));
-  EXPECT_EQ(nh.value(), (InsertMultiHintData{3, 4}));
-  absl::btree_multiset<InsertMultiHintData, InsertMultiHintDataKeyCompare>
-      other = {{3, 1}, {3, 2}, {3, 3}};
-  auto it = other.insert(--other.end(), std::move(nh));
-  EXPECT_THAT(
-      other, ElementsAre(InsertMultiHintData{3, 1}, InsertMultiHintData{3, 2},
-                         InsertMultiHintData{3, 4}, InsertMultiHintData{3, 3}));
-  EXPECT_EQ(it, --(--other.end()));
-
-  nh = src.extract(src.find(3));
-  EXPECT_EQ(nh.value(), (InsertMultiHintData{3, 5}));
-  it = other.insert(other.begin(), std::move(nh));
-  EXPECT_THAT(other,
-              ElementsAre(InsertMultiHintData{3, 5}, InsertMultiHintData{3, 1},
-                          InsertMultiHintData{3, 2}, InsertMultiHintData{3, 4},
-                          InsertMultiHintData{3, 3}));
-  EXPECT_EQ(it, other.begin());
-}
-
-struct IntCompareToCmp {
-  absl::weak_ordering operator()(int a, int b) const {
-    if (a < b) return absl::weak_ordering::less;
-    if (a > b) return absl::weak_ordering::greater;
-    return absl::weak_ordering::equivalent;
-  }
-};
-
-TEST(Btree, MergeIntoUniqueContainers) {
-  absl::btree_set<int, IntCompareToCmp> src1 = {1, 2, 3};
-  absl::btree_multiset<int> src2 = {3, 4, 4, 5};
-  absl::btree_set<int> dst;
-
-  dst.merge(src1);
-  EXPECT_TRUE(src1.empty());
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3));
-  dst.merge(src2);
-  EXPECT_THAT(src2, ElementsAre(3, 4));
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3, 4, 5));
-}
-
-TEST(Btree, MergeIntoUniqueContainersWithCompareTo) {
-  absl::btree_set<int, IntCompareToCmp> src1 = {1, 2, 3};
-  absl::btree_multiset<int> src2 = {3, 4, 4, 5};
-  absl::btree_set<int, IntCompareToCmp> dst;
-
-  dst.merge(src1);
-  EXPECT_TRUE(src1.empty());
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3));
-  dst.merge(src2);
-  EXPECT_THAT(src2, ElementsAre(3, 4));
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3, 4, 5));
-}
-
-TEST(Btree, MergeIntoMultiContainers) {
-  absl::btree_set<int, IntCompareToCmp> src1 = {1, 2, 3};
-  absl::btree_multiset<int> src2 = {3, 4, 4, 5};
-  absl::btree_multiset<int> dst;
-
-  dst.merge(src1);
-  EXPECT_TRUE(src1.empty());
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3));
-  dst.merge(src2);
-  EXPECT_TRUE(src2.empty());
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3, 3, 4, 4, 5));
-}
-
-TEST(Btree, MergeIntoMultiContainersWithCompareTo) {
-  absl::btree_set<int, IntCompareToCmp> src1 = {1, 2, 3};
-  absl::btree_multiset<int> src2 = {3, 4, 4, 5};
-  absl::btree_multiset<int, IntCompareToCmp> dst;
-
-  dst.merge(src1);
-  EXPECT_TRUE(src1.empty());
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3));
-  dst.merge(src2);
-  EXPECT_TRUE(src2.empty());
-  EXPECT_THAT(dst, ElementsAre(1, 2, 3, 3, 4, 4, 5));
-}
-
-TEST(Btree, MergeIntoMultiMapsWithDifferentComparators) {
-  absl::btree_map<int, int, IntCompareToCmp> src1 = {{1, 1}, {2, 2}, {3, 3}};
-  absl::btree_multimap<int, int, std::greater<int>> src2 = {
-      {5, 5}, {4, 1}, {4, 4}, {3, 2}};
-  absl::btree_multimap<int, int> dst;
-
-  dst.merge(src1);
-  EXPECT_TRUE(src1.empty());
-  EXPECT_THAT(dst, ElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3)));
-  dst.merge(src2);
-  EXPECT_TRUE(src2.empty());
-  EXPECT_THAT(dst, ElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3), Pair(3, 2),
-                               Pair(4, 1), Pair(4, 4), Pair(5, 5)));
-}
-
-TEST(Btree, MergeIntoSetMovableOnly) {
-  absl::btree_set<MovableOnlyInstance> src;
-  src.insert(MovableOnlyInstance(1));
-  absl::btree_multiset<MovableOnlyInstance> dst1;
-  dst1.insert(MovableOnlyInstance(2));
-  absl::btree_set<MovableOnlyInstance> dst2;
-
-  // Test merge into multiset.
-  dst1.merge(src);
-
-  EXPECT_TRUE(src.empty());
-  // ElementsAre/ElementsAreArray don't work with move-only types.
-  ASSERT_THAT(dst1, SizeIs(2));
-  EXPECT_EQ(*dst1.begin(), MovableOnlyInstance(1));
-  EXPECT_EQ(*std::next(dst1.begin()), MovableOnlyInstance(2));
-
-  // Test merge into set.
-  dst2.merge(dst1);
-
-  EXPECT_TRUE(dst1.empty());
-  ASSERT_THAT(dst2, SizeIs(2));
-  EXPECT_EQ(*dst2.begin(), MovableOnlyInstance(1));
-  EXPECT_EQ(*std::next(dst2.begin()), MovableOnlyInstance(2));
-}
-
-struct KeyCompareToWeakOrdering {
-  template <typename T>
-  absl::weak_ordering operator()(const T &a, const T &b) const {
-    return a < b ? absl::weak_ordering::less
-                 : a == b ? absl::weak_ordering::equivalent
-                          : absl::weak_ordering::greater;
-  }
-};
-
-struct KeyCompareToStrongOrdering {
-  template <typename T>
-  absl::strong_ordering operator()(const T &a, const T &b) const {
-    return a < b ? absl::strong_ordering::less
-                 : a == b ? absl::strong_ordering::equal
-                          : absl::strong_ordering::greater;
-  }
-};
-
-TEST(Btree, UserProvidedKeyCompareToComparators) {
-  absl::btree_set<int, KeyCompareToWeakOrdering> weak_set = {1, 2, 3};
-  EXPECT_TRUE(weak_set.contains(2));
-  EXPECT_FALSE(weak_set.contains(4));
-
-  absl::btree_set<int, KeyCompareToStrongOrdering> strong_set = {1, 2, 3};
-  EXPECT_TRUE(strong_set.contains(2));
-  EXPECT_FALSE(strong_set.contains(4));
-}
-
-TEST(Btree, TryEmplaceBasicTest) {
-  absl::btree_map<int, std::string> m;
-
-  // Should construct a string from the literal.
-  m.try_emplace(1, "one");
-  EXPECT_EQ(1, m.size());
-
-  // Try other string constructors and const lvalue key.
-  const int key(42);
-  m.try_emplace(key, 3, 'a');
-  m.try_emplace(2, std::string("two"));
-
-  EXPECT_TRUE(std::is_sorted(m.begin(), m.end()));
-  EXPECT_THAT(m, ElementsAreArray(std::vector<std::pair<int, std::string>>{
-                     {1, "one"}, {2, "two"}, {42, "aaa"}}));
-}
-
-TEST(Btree, TryEmplaceWithHintWorks) {
-  // Use a counting comparator here to verify that hint is used.
-  int calls = 0;
-  auto cmp = [&calls](int x, int y) {
-    ++calls;
-    return x < y;
-  };
-  using Cmp = decltype(cmp);
-
-  absl::btree_map<int, int, Cmp> m(cmp);
-  for (int i = 0; i < 128; ++i) {
-    m.emplace(i, i);
-  }
-
-  // Sanity check for the comparator
-  calls = 0;
-  m.emplace(127, 127);
-  EXPECT_GE(calls, 4);
-
-  // Try with begin hint:
-  calls = 0;
-  auto it = m.try_emplace(m.begin(), -1, -1);
-  EXPECT_EQ(129, m.size());
-  EXPECT_EQ(it, m.begin());
-  EXPECT_LE(calls, 2);
-
-  // Try with end hint:
-  calls = 0;
-  std::pair<int, int> pair1024 = {1024, 1024};
-  it = m.try_emplace(m.end(), pair1024.first, pair1024.second);
-  EXPECT_EQ(130, m.size());
-  EXPECT_EQ(it, --m.end());
-  EXPECT_LE(calls, 2);
-
-  // Try value already present, bad hint; ensure no duplicate added:
-  calls = 0;
-  it = m.try_emplace(m.end(), 16, 17);
-  EXPECT_EQ(130, m.size());
-  EXPECT_GE(calls, 4);
-  EXPECT_EQ(it, m.find(16));
-
-  // Try value already present, hint points directly to it:
-  calls = 0;
-  it = m.try_emplace(it, 16, 17);
-  EXPECT_EQ(130, m.size());
-  EXPECT_LE(calls, 2);
-  EXPECT_EQ(it, m.find(16));
-
-  m.erase(2);
-  EXPECT_EQ(129, m.size());
-  auto hint = m.find(3);
-  // Try emplace in the middle of two other elements.
-  calls = 0;
-  m.try_emplace(hint, 2, 2);
-  EXPECT_EQ(130, m.size());
-  EXPECT_LE(calls, 2);
-
-  EXPECT_TRUE(std::is_sorted(m.begin(), m.end()));
-}
-
-TEST(Btree, TryEmplaceWithBadHint) {
-  absl::btree_map<int, int> m = {{1, 1}, {9, 9}};
-
-  // Bad hint (too small), should still emplace:
-  auto it = m.try_emplace(m.begin(), 2, 2);
-  EXPECT_EQ(it, ++m.begin());
-  EXPECT_THAT(m, ElementsAreArray(
-                     std::vector<std::pair<int, int>>{{1, 1}, {2, 2}, {9, 9}}));
-
-  // Bad hint, too large this time:
-  it = m.try_emplace(++(++m.begin()), 0, 0);
-  EXPECT_EQ(it, m.begin());
-  EXPECT_THAT(m, ElementsAreArray(std::vector<std::pair<int, int>>{
-                     {0, 0}, {1, 1}, {2, 2}, {9, 9}}));
-}
-
-TEST(Btree, TryEmplaceMaintainsSortedOrder) {
-  absl::btree_map<int, std::string> m;
-  std::pair<int, std::string> pair5 = {5, "five"};
-
-  // Test both lvalue & rvalue emplace.
-  m.try_emplace(10, "ten");
-  m.try_emplace(pair5.first, pair5.second);
-  EXPECT_EQ(2, m.size());
-  EXPECT_TRUE(std::is_sorted(m.begin(), m.end()));
-
-  int int100{100};
-  m.try_emplace(int100, "hundred");
-  m.try_emplace(1, "one");
-  EXPECT_EQ(4, m.size());
-  EXPECT_TRUE(std::is_sorted(m.begin(), m.end()));
-}
-
-TEST(Btree, TryEmplaceWithHintAndNoValueArgsWorks) {
-  absl::btree_map<int, int> m;
-  m.try_emplace(m.end(), 1);
-  EXPECT_EQ(0, m[1]);
-}
-
-TEST(Btree, TryEmplaceWithHintAndMultipleValueArgsWorks) {
-  absl::btree_map<int, std::string> m;
-  m.try_emplace(m.end(), 1, 10, 'a');
-  EXPECT_EQ(std::string(10, 'a'), m[1]);
-}
-
-TEST(Btree, MoveAssignmentAllocatorPropagation) {
-  InstanceTracker tracker;
-
-  int64_t bytes1 = 0, bytes2 = 0;
-  PropagatingCountingAlloc<MovableOnlyInstance> allocator1(&bytes1);
-  PropagatingCountingAlloc<MovableOnlyInstance> allocator2(&bytes2);
-  std::less<MovableOnlyInstance> cmp;
-
-  // Test propagating allocator_type.
-  {
-    absl::btree_set<MovableOnlyInstance, std::less<MovableOnlyInstance>,
-                    PropagatingCountingAlloc<MovableOnlyInstance>>
-        set1(cmp, allocator1), set2(cmp, allocator2);
-
-    for (int i = 0; i < 100; ++i) set1.insert(MovableOnlyInstance(i));
-
-    tracker.ResetCopiesMovesSwaps();
-    set2 = std::move(set1);
-    EXPECT_EQ(tracker.moves(), 0);
-  }
-  // Test non-propagating allocator_type with equal allocators.
-  {
-    absl::btree_set<MovableOnlyInstance, std::less<MovableOnlyInstance>,
-                    CountingAllocator<MovableOnlyInstance>>
-        set1(cmp, allocator1), set2(cmp, allocator1);
-
-    for (int i = 0; i < 100; ++i) set1.insert(MovableOnlyInstance(i));
-
-    tracker.ResetCopiesMovesSwaps();
-    set2 = std::move(set1);
-    EXPECT_EQ(tracker.moves(), 0);
-  }
-  // Test non-propagating allocator_type with different allocators.
-  {
-    absl::btree_set<MovableOnlyInstance, std::less<MovableOnlyInstance>,
-                    CountingAllocator<MovableOnlyInstance>>
-        set1(cmp, allocator1), set2(cmp, allocator2);
-
-    for (int i = 0; i < 100; ++i) set1.insert(MovableOnlyInstance(i));
-
-    tracker.ResetCopiesMovesSwaps();
-    set2 = std::move(set1);
-    EXPECT_GE(tracker.moves(), 100);
-  }
-}
-
-TEST(Btree, EmptyTree) {
-  absl::btree_set<int> s;
-  EXPECT_TRUE(s.empty());
-  EXPECT_EQ(s.size(), 0);
-  EXPECT_GT(s.max_size(), 0);
-}
-
-bool IsEven(int k) { return k % 2 == 0; }
-
-TEST(Btree, EraseIf) {
-  // Test that erase_if works with all the container types and supports lambdas.
-  {
-    absl::btree_set<int> s = {1, 3, 5, 6, 100};
-    erase_if(s, [](int k) { return k > 3; });
-    EXPECT_THAT(s, ElementsAre(1, 3));
-  }
-  {
-    absl::btree_multiset<int> s = {1, 3, 3, 5, 6, 6, 100};
-    erase_if(s, [](int k) { return k <= 3; });
-    EXPECT_THAT(s, ElementsAre(5, 6, 6, 100));
-  }
-  {
-    absl::btree_map<int, int> m = {{1, 1}, {3, 3}, {6, 6}, {100, 100}};
-    erase_if(m, [](std::pair<const int, int> kv) { return kv.first > 3; });
-    EXPECT_THAT(m, ElementsAre(Pair(1, 1), Pair(3, 3)));
-  }
-  {
-    absl::btree_multimap<int, int> m = {{1, 1}, {3, 3}, {3, 6},
-                                        {6, 6}, {6, 7}, {100, 6}};
-    erase_if(m, [](std::pair<const int, int> kv) { return kv.second == 6; });
-    EXPECT_THAT(m, ElementsAre(Pair(1, 1), Pair(3, 3), Pair(6, 7)));
-  }
-  // Test that erasing all elements from a large set works and test support for
-  // function pointers.
-  {
-    absl::btree_set<int> s;
-    for (int i = 0; i < 1000; ++i) s.insert(2 * i);
-    erase_if(s, IsEven);
-    EXPECT_THAT(s, IsEmpty());
-  }
-  // Test that erase_if supports other format of function pointers.
-  {
-    absl::btree_set<int> s = {1, 3, 5, 6, 100};
-    erase_if(s, &IsEven);
-    EXPECT_THAT(s, ElementsAre(1, 3, 5));
-  }
-}
-
-TEST(Btree, InsertOrAssign) {
-  absl::btree_map<int, int> m = {{1, 1}, {3, 3}};
-  using value_type = typename decltype(m)::value_type;
-
-  auto ret = m.insert_or_assign(4, 4);
-  EXPECT_EQ(*ret.first, value_type(4, 4));
-  EXPECT_TRUE(ret.second);
-  ret = m.insert_or_assign(3, 100);
-  EXPECT_EQ(*ret.first, value_type(3, 100));
-  EXPECT_FALSE(ret.second);
-
-  auto hint_ret = m.insert_or_assign(ret.first, 3, 200);
-  EXPECT_EQ(*hint_ret, value_type(3, 200));
-  hint_ret = m.insert_or_assign(m.find(1), 0, 1);
-  EXPECT_EQ(*hint_ret, value_type(0, 1));
-  // Test with bad hint.
-  hint_ret = m.insert_or_assign(m.end(), -1, 1);
-  EXPECT_EQ(*hint_ret, value_type(-1, 1));
-
-  EXPECT_THAT(m, ElementsAre(Pair(-1, 1), Pair(0, 1), Pair(1, 1), Pair(3, 200),
-                             Pair(4, 4)));
-}
-
-TEST(Btree, InsertOrAssignMovableOnly) {
-  absl::btree_map<int, MovableOnlyInstance> m;
-  using value_type = typename decltype(m)::value_type;
-
-  auto ret = m.insert_or_assign(4, MovableOnlyInstance(4));
-  EXPECT_EQ(*ret.first, value_type(4, MovableOnlyInstance(4)));
-  EXPECT_TRUE(ret.second);
-  ret = m.insert_or_assign(4, MovableOnlyInstance(100));
-  EXPECT_EQ(*ret.first, value_type(4, MovableOnlyInstance(100)));
-  EXPECT_FALSE(ret.second);
-
-  auto hint_ret = m.insert_or_assign(ret.first, 3, MovableOnlyInstance(200));
-  EXPECT_EQ(*hint_ret, value_type(3, MovableOnlyInstance(200)));
-
-  EXPECT_EQ(m.size(), 2);
-}
-
-TEST(Btree, BitfieldArgument) {
-  union {
-    int n : 1;
-  };
-  n = 0;
-  absl::btree_map<int, int> m;
-  m.erase(n);
-  m.count(n);
-  m.find(n);
-  m.contains(n);
-  m.equal_range(n);
-  m.insert_or_assign(n, n);
-  m.insert_or_assign(m.end(), n, n);
-  m.try_emplace(n);
-  m.try_emplace(m.end(), n);
-  m.at(n);
-  m[n];
-}
-
-TEST(Btree, SetRangeConstructorAndInsertSupportExplicitConversionComparable) {
-  const absl::string_view names[] = {"n1", "n2"};
-
-  absl::btree_set<std::string> name_set1{std::begin(names), std::end(names)};
-  EXPECT_THAT(name_set1, ElementsAreArray(names));
-
-  absl::btree_set<std::string> name_set2;
-  name_set2.insert(std::begin(names), std::end(names));
-  EXPECT_THAT(name_set2, ElementsAreArray(names));
-}
-
-// A type that is explicitly convertible from int and counts constructor calls.
-struct ConstructorCounted {
-  explicit ConstructorCounted(int i) : i(i) { ++constructor_calls; }
-  bool operator==(int other) const { return i == other; }
-
-  int i;
-  static int constructor_calls;
-};
-int ConstructorCounted::constructor_calls = 0;
-
-struct ConstructorCountedCompare {
-  bool operator()(int a, const ConstructorCounted &b) const { return a < b.i; }
-  bool operator()(const ConstructorCounted &a, int b) const { return a.i < b; }
-  bool operator()(const ConstructorCounted &a,
-                  const ConstructorCounted &b) const {
-    return a.i < b.i;
-  }
-  using is_transparent = void;
-};
-
-TEST(Btree,
-     SetRangeConstructorAndInsertExplicitConvComparableLimitConstruction) {
-  const int i[] = {0, 1, 1};
-  ConstructorCounted::constructor_calls = 0;
-
-  absl::btree_set<ConstructorCounted, ConstructorCountedCompare> set{
-      std::begin(i), std::end(i)};
-  EXPECT_THAT(set, ElementsAre(0, 1));
-  EXPECT_EQ(ConstructorCounted::constructor_calls, 2);
-
-  set.insert(std::begin(i), std::end(i));
-  EXPECT_THAT(set, ElementsAre(0, 1));
-  EXPECT_EQ(ConstructorCounted::constructor_calls, 2);
-}
-
-TEST(Btree,
-     SetRangeConstructorAndInsertSupportExplicitConversionNonComparable) {
-  const int i[] = {0, 1};
-
-  absl::btree_set<std::vector<void *>> s1{std::begin(i), std::end(i)};
-  EXPECT_THAT(s1, ElementsAre(IsEmpty(), ElementsAre(IsNull())));
-
-  absl::btree_set<std::vector<void *>> s2;
-  s2.insert(std::begin(i), std::end(i));
-  EXPECT_THAT(s2, ElementsAre(IsEmpty(), ElementsAre(IsNull())));
-}
-
-// libstdc++ included with GCC 4.9 has a bug in the std::pair constructors that
-// prevents explicit conversions between pair types.
-// We only run this test for the libstdc++ from GCC 7 or newer because we can't
-// reliably check the libstdc++ version prior to that release.
-#if !defined(__GLIBCXX__) || \
-    (defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE >= 7)
-TEST(Btree, MapRangeConstructorAndInsertSupportExplicitConversionComparable) {
-  const std::pair<absl::string_view, int> names[] = {{"n1", 1}, {"n2", 2}};
-
-  absl::btree_map<std::string, int> name_map1{std::begin(names),
-                                              std::end(names)};
-  EXPECT_THAT(name_map1, ElementsAre(Pair("n1", 1), Pair("n2", 2)));
-
-  absl::btree_map<std::string, int> name_map2;
-  name_map2.insert(std::begin(names), std::end(names));
-  EXPECT_THAT(name_map2, ElementsAre(Pair("n1", 1), Pair("n2", 2)));
-}
-
-TEST(Btree,
-     MapRangeConstructorAndInsertExplicitConvComparableLimitConstruction) {
-  const std::pair<int, int> i[] = {{0, 1}, {1, 2}, {1, 3}};
-  ConstructorCounted::constructor_calls = 0;
-
-  absl::btree_map<ConstructorCounted, int, ConstructorCountedCompare> map{
-      std::begin(i), std::end(i)};
-  EXPECT_THAT(map, ElementsAre(Pair(0, 1), Pair(1, 2)));
-  EXPECT_EQ(ConstructorCounted::constructor_calls, 2);
-
-  map.insert(std::begin(i), std::end(i));
-  EXPECT_THAT(map, ElementsAre(Pair(0, 1), Pair(1, 2)));
-  EXPECT_EQ(ConstructorCounted::constructor_calls, 2);
-}
-
-TEST(Btree,
-     MapRangeConstructorAndInsertSupportExplicitConversionNonComparable) {
-  const std::pair<int, int> i[] = {{0, 1}, {1, 2}};
-
-  absl::btree_map<std::vector<void *>, int> m1{std::begin(i), std::end(i)};
-  EXPECT_THAT(m1,
-              ElementsAre(Pair(IsEmpty(), 1), Pair(ElementsAre(IsNull()), 2)));
-
-  absl::btree_map<std::vector<void *>, int> m2;
-  m2.insert(std::begin(i), std::end(i));
-  EXPECT_THAT(m2,
-              ElementsAre(Pair(IsEmpty(), 1), Pair(ElementsAre(IsNull()), 2)));
-}
-
-TEST(Btree, HeterogeneousTryEmplace) {
-  absl::btree_map<std::string, int> m;
-  std::string s = "key";
-  absl::string_view sv = s;
-  m.try_emplace(sv, 1);
-  EXPECT_EQ(m[s], 1);
-
-  m.try_emplace(m.end(), sv, 2);
-  EXPECT_EQ(m[s], 1);
-}
-
-TEST(Btree, HeterogeneousOperatorMapped) {
-  absl::btree_map<std::string, int> m;
-  std::string s = "key";
-  absl::string_view sv = s;
-  m[sv] = 1;
-  EXPECT_EQ(m[s], 1);
-
-  m[sv] = 2;
-  EXPECT_EQ(m[s], 2);
-}
-
-TEST(Btree, HeterogeneousInsertOrAssign) {
-  absl::btree_map<std::string, int> m;
-  std::string s = "key";
-  absl::string_view sv = s;
-  m.insert_or_assign(sv, 1);
-  EXPECT_EQ(m[s], 1);
-
-  m.insert_or_assign(m.end(), sv, 2);
-  EXPECT_EQ(m[s], 2);
-}
-#endif
-
-// This test requires std::launder for mutable key access in node handles.
-#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
-TEST(Btree, NodeHandleMutableKeyAccess) {
-  {
-    absl::btree_map<std::string, std::string> map;
-
-    map["key1"] = "mapped";
-
-    auto nh = map.extract(map.begin());
-    nh.key().resize(3);
-    map.insert(std::move(nh));
-
-    EXPECT_THAT(map, ElementsAre(Pair("key", "mapped")));
-  }
-  // Also for multimap.
-  {
-    absl::btree_multimap<std::string, std::string> map;
-
-    map.emplace("key1", "mapped");
-
-    auto nh = map.extract(map.begin());
-    nh.key().resize(3);
-    map.insert(std::move(nh));
-
-    EXPECT_THAT(map, ElementsAre(Pair("key", "mapped")));
-  }
-}
-#endif
-
-struct MultiKey {
-  int i1;
-  int i2;
-};
-
-bool operator==(const MultiKey a, const MultiKey b) {
-  return a.i1 == b.i1 && a.i2 == b.i2;
-}
-
-// A heterogeneous comparator that has different equivalence classes for
-// different lookup types.
-struct MultiKeyComp {
-  using is_transparent = void;
-  bool operator()(const MultiKey a, const MultiKey b) const {
-    if (a.i1 != b.i1) return a.i1 < b.i1;
-    return a.i2 < b.i2;
-  }
-  bool operator()(const int a, const MultiKey b) const { return a < b.i1; }
-  bool operator()(const MultiKey a, const int b) const { return a.i1 < b; }
-};
-
-// A heterogeneous, three-way comparator that has different equivalence classes
-// for different lookup types.
-struct MultiKeyThreeWayComp {
-  using is_transparent = void;
-  absl::weak_ordering operator()(const MultiKey a, const MultiKey b) const {
-    if (a.i1 < b.i1) return absl::weak_ordering::less;
-    if (a.i1 > b.i1) return absl::weak_ordering::greater;
-    if (a.i2 < b.i2) return absl::weak_ordering::less;
-    if (a.i2 > b.i2) return absl::weak_ordering::greater;
-    return absl::weak_ordering::equivalent;
-  }
-  absl::weak_ordering operator()(const int a, const MultiKey b) const {
-    if (a < b.i1) return absl::weak_ordering::less;
-    if (a > b.i1) return absl::weak_ordering::greater;
-    return absl::weak_ordering::equivalent;
-  }
-  absl::weak_ordering operator()(const MultiKey a, const int b) const {
-    if (a.i1 < b) return absl::weak_ordering::less;
-    if (a.i1 > b) return absl::weak_ordering::greater;
-    return absl::weak_ordering::equivalent;
-  }
-};
-
-template <typename Compare>
-class BtreeMultiKeyTest : public ::testing::Test {};
-using MultiKeyComps = ::testing::Types<MultiKeyComp, MultiKeyThreeWayComp>;
-TYPED_TEST_SUITE(BtreeMultiKeyTest, MultiKeyComps);
-
-TYPED_TEST(BtreeMultiKeyTest, EqualRange) {
-  absl::btree_set<MultiKey, TypeParam> set;
-  for (int i = 0; i < 100; ++i) {
-    for (int j = 0; j < 100; ++j) {
-      set.insert({i, j});
-    }
-  }
-
-  for (int i = 0; i < 100; ++i) {
-    auto equal_range = set.equal_range(i);
-    EXPECT_EQ(equal_range.first->i1, i);
-    EXPECT_EQ(equal_range.first->i2, 0) << i;
-    EXPECT_EQ(std::distance(equal_range.first, equal_range.second), 100) << i;
-  }
-}
-
-TYPED_TEST(BtreeMultiKeyTest, Extract) {
-  absl::btree_set<MultiKey, TypeParam> set;
-  for (int i = 0; i < 100; ++i) {
-    for (int j = 0; j < 100; ++j) {
-      set.insert({i, j});
-    }
-  }
-
-  for (int i = 0; i < 100; ++i) {
-    auto node_handle = set.extract(i);
-    EXPECT_EQ(node_handle.value().i1, i);
-    EXPECT_EQ(node_handle.value().i2, 0) << i;
-  }
-
-  for (int i = 0; i < 100; ++i) {
-    auto node_handle = set.extract(i);
-    EXPECT_EQ(node_handle.value().i1, i);
-    EXPECT_EQ(node_handle.value().i2, 1) << i;
-  }
-}
-
-TYPED_TEST(BtreeMultiKeyTest, Erase) {
-  absl::btree_set<MultiKey, TypeParam> set = {
-      {1, 1}, {2, 1}, {2, 2}, {3, 1}};
-  EXPECT_EQ(set.erase(2), 2);
-  EXPECT_THAT(set, ElementsAre(MultiKey{1, 1}, MultiKey{3, 1}));
-}
-
-TYPED_TEST(BtreeMultiKeyTest, Count) {
-  const absl::btree_set<MultiKey, TypeParam> set = {
-      {1, 1}, {2, 1}, {2, 2}, {3, 1}};
-  EXPECT_EQ(set.count(2), 2);
-}
-
-TEST(Btree, AllocConstructor) {
-  using Alloc = CountingAllocator<int>;
-  using Set = absl::btree_set<int, std::less<int>, Alloc>;
-  int64_t bytes_used = 0;
-  Alloc alloc(&bytes_used);
-  Set set(alloc);
-
-  set.insert({1, 2, 3});
-
-  EXPECT_THAT(set, ElementsAre(1, 2, 3));
-  EXPECT_GT(bytes_used, set.size() * sizeof(int));
-}
-
-TEST(Btree, AllocInitializerListConstructor) {
-  using Alloc = CountingAllocator<int>;
-  using Set = absl::btree_set<int, std::less<int>, Alloc>;
-  int64_t bytes_used = 0;
-  Alloc alloc(&bytes_used);
-  Set set({1, 2, 3}, alloc);
-
-  EXPECT_THAT(set, ElementsAre(1, 2, 3));
-  EXPECT_GT(bytes_used, set.size() * sizeof(int));
-}
-
-TEST(Btree, AllocRangeConstructor) {
-  using Alloc = CountingAllocator<int>;
-  using Set = absl::btree_set<int, std::less<int>, Alloc>;
-  int64_t bytes_used = 0;
-  Alloc alloc(&bytes_used);
-  std::vector<int> v = {1, 2, 3};
-  Set set(v.begin(), v.end(), alloc);
-
-  EXPECT_THAT(set, ElementsAre(1, 2, 3));
-  EXPECT_GT(bytes_used, set.size() * sizeof(int));
-}
-
-TEST(Btree, AllocCopyConstructor) {
-  using Alloc = CountingAllocator<int>;
-  using Set = absl::btree_set<int, std::less<int>, Alloc>;
-  int64_t bytes_used1 = 0;
-  Alloc alloc1(&bytes_used1);
-  Set set1(alloc1);
-
-  set1.insert({1, 2, 3});
-
-  int64_t bytes_used2 = 0;
-  Alloc alloc2(&bytes_used2);
-  Set set2(set1, alloc2);
-
-  EXPECT_THAT(set1, ElementsAre(1, 2, 3));
-  EXPECT_THAT(set2, ElementsAre(1, 2, 3));
-  EXPECT_GT(bytes_used1, set1.size() * sizeof(int));
-  EXPECT_EQ(bytes_used1, bytes_used2);
-}
-
-TEST(Btree, AllocMoveConstructor_SameAlloc) {
-  using Alloc = CountingAllocator<int>;
-  using Set = absl::btree_set<int, std::less<int>, Alloc>;
-  int64_t bytes_used = 0;
-  Alloc alloc(&bytes_used);
-  Set set1(alloc);
-
-  set1.insert({1, 2, 3});
-
-  const int64_t original_bytes_used = bytes_used;
-  EXPECT_GT(original_bytes_used, set1.size() * sizeof(int));
-
-  Set set2(std::move(set1), alloc);
-
-  EXPECT_THAT(set2, ElementsAre(1, 2, 3));
-  EXPECT_EQ(bytes_used, original_bytes_used);
-}
-
-TEST(Btree, AllocMoveConstructor_DifferentAlloc) {
-  using Alloc = CountingAllocator<int>;
-  using Set = absl::btree_set<int, std::less<int>, Alloc>;
-  int64_t bytes_used1 = 0;
-  Alloc alloc1(&bytes_used1);
-  Set set1(alloc1);
-
-  set1.insert({1, 2, 3});
-
-  const int64_t original_bytes_used = bytes_used1;
-  EXPECT_GT(original_bytes_used, set1.size() * sizeof(int));
-
-  int64_t bytes_used2 = 0;
-  Alloc alloc2(&bytes_used2);
-  Set set2(std::move(set1), alloc2);
-
-  EXPECT_THAT(set2, ElementsAre(1, 2, 3));
-  // We didn't free these bytes allocated by `set1` yet.
-  EXPECT_EQ(bytes_used1, original_bytes_used);
-  EXPECT_EQ(bytes_used2, original_bytes_used);
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/btree_test.h b/third_party/abseil/absl/container/btree_test.h
deleted file mode 100644
index 6249080..0000000
--- a/third_party/abseil/absl/container/btree_test.h
+++ /dev/null
@@ -1,166 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_BTREE_TEST_H_
-#define ABSL_CONTAINER_BTREE_TEST_H_
-
-#include <algorithm>
-#include <cassert>
-#include <random>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "absl/container/btree_map.h"
-#include "absl/container/btree_set.h"
-#include "absl/container/flat_hash_set.h"
-#include "absl/strings/cord.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// Like remove_const but propagates the removal through std::pair.
-template <typename T>
-struct remove_pair_const {
-  using type = typename std::remove_const<T>::type;
-};
-template <typename T, typename U>
-struct remove_pair_const<std::pair<T, U> > {
-  using type = std::pair<typename remove_pair_const<T>::type,
-                         typename remove_pair_const<U>::type>;
-};
-
-// Utility class to provide an accessor for a key given a value. The default
-// behavior is to treat the value as a pair and return the first element.
-template <typename K, typename V>
-struct KeyOfValue {
-  struct type {
-    const K& operator()(const V& p) const { return p.first; }
-  };
-};
-
-// Partial specialization of KeyOfValue class for when the key and value are
-// the same type such as in set<> and btree_set<>.
-template <typename K>
-struct KeyOfValue<K, K> {
-  struct type {
-    const K& operator()(const K& k) const { return k; }
-  };
-};
-
-inline char* GenerateDigits(char buf[16], unsigned val, unsigned maxval) {
-  assert(val <= maxval);
-  constexpr unsigned kBase = 64;  // avoid integer division.
-  unsigned p = 15;
-  buf[p--] = 0;
-  while (maxval > 0) {
-    buf[p--] = ' ' + (val % kBase);
-    val /= kBase;
-    maxval /= kBase;
-  }
-  return buf + p + 1;
-}
-
-template <typename K>
-struct Generator {
-  int maxval;
-  explicit Generator(int m) : maxval(m) {}
-  K operator()(int i) const {
-    assert(i <= maxval);
-    return K(i);
-  }
-};
-
-template <>
-struct Generator<absl::Time> {
-  int maxval;
-  explicit Generator(int m) : maxval(m) {}
-  absl::Time operator()(int i) const { return absl::FromUnixMillis(i); }
-};
-
-template <>
-struct Generator<std::string> {
-  int maxval;
-  explicit Generator(int m) : maxval(m) {}
-  std::string operator()(int i) const {
-    char buf[16];
-    return GenerateDigits(buf, i, maxval);
-  }
-};
-
-template <>
-struct Generator<Cord> {
-  int maxval;
-  explicit Generator(int m) : maxval(m) {}
-  Cord operator()(int i) const {
-    char buf[16];
-    return Cord(GenerateDigits(buf, i, maxval));
-  }
-};
-
-template <typename T, typename U>
-struct Generator<std::pair<T, U> > {
-  Generator<typename remove_pair_const<T>::type> tgen;
-  Generator<typename remove_pair_const<U>::type> ugen;
-
-  explicit Generator(int m) : tgen(m), ugen(m) {}
-  std::pair<T, U> operator()(int i) const {
-    return std::make_pair(tgen(i), ugen(i));
-  }
-};
-
-// Generate n values for our tests and benchmarks. Value range is [0, maxval].
-inline std::vector<int> GenerateNumbersWithSeed(int n, int maxval, int seed) {
-  // NOTE: Some tests rely on generated numbers not changing between test runs.
-  // We use std::minstd_rand0 because it is well-defined, but don't use
-  // std::uniform_int_distribution because platforms use different algorithms.
-  std::minstd_rand0 rng(seed);
-
-  std::vector<int> values;
-  absl::flat_hash_set<int> unique_values;
-  if (values.size() < n) {
-    for (int i = values.size(); i < n; i++) {
-      int value;
-      do {
-        value = static_cast<int>(rng()) % (maxval + 1);
-      } while (!unique_values.insert(value).second);
-
-      values.push_back(value);
-    }
-  }
-  return values;
-}
-
-// Generates n values in the range [0, maxval].
-template <typename V>
-std::vector<V> GenerateValuesWithSeed(int n, int maxval, int seed) {
-  const std::vector<int> nums = GenerateNumbersWithSeed(n, maxval, seed);
-  Generator<V> gen(maxval);
-  std::vector<V> vec;
-
-  vec.reserve(n);
-  for (int i = 0; i < n; i++) {
-    vec.push_back(gen(nums[i]));
-  }
-
-  return vec;
-}
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_BTREE_TEST_H_
diff --git a/third_party/abseil/absl/container/fixed_array.h b/third_party/abseil/absl/container/fixed_array.h
deleted file mode 100644
index fcb3e54..0000000
--- a/third_party/abseil/absl/container/fixed_array.h
+++ /dev/null
@@ -1,532 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: fixed_array.h
-// -----------------------------------------------------------------------------
-//
-// A `FixedArray<T>` represents a non-resizable array of `T` where the length of
-// the array can be determined at run-time. It is a good replacement for
-// non-standard and deprecated uses of `alloca()` and variable length arrays
-// within the GCC extension. (See
-// https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html).
-//
-// `FixedArray` allocates small arrays inline, keeping performance fast by
-// avoiding heap operations. It also helps reduce the chances of
-// accidentally overflowing your stack if large input is passed to
-// your function.
-
-#ifndef ABSL_CONTAINER_FIXED_ARRAY_H_
-#define ABSL_CONTAINER_FIXED_ARRAY_H_
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <initializer_list>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <new>
-#include <type_traits>
-
-#include "absl/algorithm/algorithm.h"
-#include "absl/base/config.h"
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-#include "absl/container/internal/compressed_tuple.h"
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-constexpr static auto kFixedArrayUseDefault = static_cast<size_t>(-1);
-
-// -----------------------------------------------------------------------------
-// FixedArray
-// -----------------------------------------------------------------------------
-//
-// A `FixedArray` provides a run-time fixed-size array, allocating a small array
-// inline for efficiency.
-//
-// Most users should not specify an `inline_elements` argument and let
-// `FixedArray` automatically determine the number of elements
-// to store inline based on `sizeof(T)`. If `inline_elements` is specified, the
-// `FixedArray` implementation will use inline storage for arrays with a
-// length <= `inline_elements`.
-//
-// Note that a `FixedArray` constructed with a `size_type` argument will
-// default-initialize its values by leaving trivially constructible types
-// uninitialized (e.g. int, int[4], double), and others default-constructed.
-// This matches the behavior of c-style arrays and `std::array`, but not
-// `std::vector`.
-//
-// Note that `FixedArray` does not provide a public allocator; if it requires a
-// heap allocation, it will do so with global `::operator new[]()` and
-// `::operator delete[]()`, even if T provides class-scope overrides for these
-// operators.
-template <typename T, size_t N = kFixedArrayUseDefault,
-          typename A = std::allocator<T>>
-class FixedArray {
-  static_assert(!std::is_array<T>::value || std::extent<T>::value > 0,
-                "Arrays with unknown bounds cannot be used with FixedArray.");
-
-  static constexpr size_t kInlineBytesDefault = 256;
-
-  using AllocatorTraits = std::allocator_traits<A>;
-  // std::iterator_traits isn't guaranteed to be SFINAE-friendly until C++17,
-  // but this seems to be mostly pedantic.
-  template <typename Iterator>
-  using EnableIfForwardIterator = absl::enable_if_t<std::is_convertible<
-      typename std::iterator_traits<Iterator>::iterator_category,
-      std::forward_iterator_tag>::value>;
-  static constexpr bool NoexceptCopyable() {
-    return std::is_nothrow_copy_constructible<StorageElement>::value &&
-           absl::allocator_is_nothrow<allocator_type>::value;
-  }
-  static constexpr bool NoexceptMovable() {
-    return std::is_nothrow_move_constructible<StorageElement>::value &&
-           absl::allocator_is_nothrow<allocator_type>::value;
-  }
-  static constexpr bool DefaultConstructorIsNonTrivial() {
-    return !absl::is_trivially_default_constructible<StorageElement>::value;
-  }
-
- public:
-  using allocator_type = typename AllocatorTraits::allocator_type;
-  using value_type = typename AllocatorTraits::value_type;
-  using pointer = typename AllocatorTraits::pointer;
-  using const_pointer = typename AllocatorTraits::const_pointer;
-  using reference = value_type&;
-  using const_reference = const value_type&;
-  using size_type = typename AllocatorTraits::size_type;
-  using difference_type = typename AllocatorTraits::difference_type;
-  using iterator = pointer;
-  using const_iterator = const_pointer;
-  using reverse_iterator = std::reverse_iterator<iterator>;
-  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
-
-  static constexpr size_type inline_elements =
-      (N == kFixedArrayUseDefault ? kInlineBytesDefault / sizeof(value_type)
-                                  : static_cast<size_type>(N));
-
-  FixedArray(
-      const FixedArray& other,
-      const allocator_type& a = allocator_type()) noexcept(NoexceptCopyable())
-      : FixedArray(other.begin(), other.end(), a) {}
-
-  FixedArray(
-      FixedArray&& other,
-      const allocator_type& a = allocator_type()) noexcept(NoexceptMovable())
-      : FixedArray(std::make_move_iterator(other.begin()),
-                   std::make_move_iterator(other.end()), a) {}
-
-  // Creates an array object that can store `n` elements.
-  // Note that trivially constructible elements will be uninitialized.
-  explicit FixedArray(size_type n, const allocator_type& a = allocator_type())
-      : storage_(n, a) {
-    if (DefaultConstructorIsNonTrivial()) {
-      memory_internal::ConstructRange(storage_.alloc(), storage_.begin(),
-                                      storage_.end());
-    }
-  }
-
-  // Creates an array initialized with `n` copies of `val`.
-  FixedArray(size_type n, const value_type& val,
-             const allocator_type& a = allocator_type())
-      : storage_(n, a) {
-    memory_internal::ConstructRange(storage_.alloc(), storage_.begin(),
-                                    storage_.end(), val);
-  }
-
-  // Creates an array initialized with the size and contents of `init_list`.
-  FixedArray(std::initializer_list<value_type> init_list,
-             const allocator_type& a = allocator_type())
-      : FixedArray(init_list.begin(), init_list.end(), a) {}
-
-  // Creates an array initialized with the elements from the input
-  // range. The array's size will always be `std::distance(first, last)`.
-  // REQUIRES: Iterator must be a forward_iterator or better.
-  template <typename Iterator, EnableIfForwardIterator<Iterator>* = nullptr>
-  FixedArray(Iterator first, Iterator last,
-             const allocator_type& a = allocator_type())
-      : storage_(std::distance(first, last), a) {
-    memory_internal::CopyRange(storage_.alloc(), storage_.begin(), first, last);
-  }
-
-  ~FixedArray() noexcept {
-    for (auto* cur = storage_.begin(); cur != storage_.end(); ++cur) {
-      AllocatorTraits::destroy(storage_.alloc(), cur);
-    }
-  }
-
-  // Assignments are deleted because they break the invariant that the size of a
-  // `FixedArray` never changes.
-  void operator=(FixedArray&&) = delete;
-  void operator=(const FixedArray&) = delete;
-
-  // FixedArray::size()
-  //
-  // Returns the length of the fixed array.
-  size_type size() const { return storage_.size(); }
-
-  // FixedArray::max_size()
-  //
-  // Returns the largest possible value of `std::distance(begin(), end())` for a
-  // `FixedArray<T>`. This is equivalent to the most possible addressable bytes
-  // over the number of bytes taken by T.
-  constexpr size_type max_size() const {
-    return (std::numeric_limits<difference_type>::max)() / sizeof(value_type);
-  }
-
-  // FixedArray::empty()
-  //
-  // Returns whether or not the fixed array is empty.
-  bool empty() const { return size() == 0; }
-
-  // FixedArray::memsize()
-  //
-  // Returns the memory size of the fixed array in bytes.
-  size_t memsize() const { return size() * sizeof(value_type); }
-
-  // FixedArray::data()
-  //
-  // Returns a const T* pointer to elements of the `FixedArray`. This pointer
-  // can be used to access (but not modify) the contained elements.
-  const_pointer data() const { return AsValueType(storage_.begin()); }
-
-  // Overload of FixedArray::data() to return a T* pointer to elements of the
-  // fixed array. This pointer can be used to access and modify the contained
-  // elements.
-  pointer data() { return AsValueType(storage_.begin()); }
-
-  // FixedArray::operator[]
-  //
-  // Returns a reference the ith element of the fixed array.
-  // REQUIRES: 0 <= i < size()
-  reference operator[](size_type i) {
-    ABSL_HARDENING_ASSERT(i < size());
-    return data()[i];
-  }
-
-  // Overload of FixedArray::operator()[] to return a const reference to the
-  // ith element of the fixed array.
-  // REQUIRES: 0 <= i < size()
-  const_reference operator[](size_type i) const {
-    ABSL_HARDENING_ASSERT(i < size());
-    return data()[i];
-  }
-
-  // FixedArray::at
-  //
-  // Bounds-checked access.  Returns a reference to the ith element of the fixed
-  // array, or throws std::out_of_range
-  reference at(size_type i) {
-    if (ABSL_PREDICT_FALSE(i >= size())) {
-      base_internal::ThrowStdOutOfRange("FixedArray::at failed bounds check");
-    }
-    return data()[i];
-  }
-
-  // Overload of FixedArray::at() to return a const reference to the ith element
-  // of the fixed array.
-  const_reference at(size_type i) const {
-    if (ABSL_PREDICT_FALSE(i >= size())) {
-      base_internal::ThrowStdOutOfRange("FixedArray::at failed bounds check");
-    }
-    return data()[i];
-  }
-
-  // FixedArray::front()
-  //
-  // Returns a reference to the first element of the fixed array.
-  reference front() {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[0];
-  }
-
-  // Overload of FixedArray::front() to return a reference to the first element
-  // of a fixed array of const values.
-  const_reference front() const {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[0];
-  }
-
-  // FixedArray::back()
-  //
-  // Returns a reference to the last element of the fixed array.
-  reference back() {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[size() - 1];
-  }
-
-  // Overload of FixedArray::back() to return a reference to the last element
-  // of a fixed array of const values.
-  const_reference back() const {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[size() - 1];
-  }
-
-  // FixedArray::begin()
-  //
-  // Returns an iterator to the beginning of the fixed array.
-  iterator begin() { return data(); }
-
-  // Overload of FixedArray::begin() to return a const iterator to the
-  // beginning of the fixed array.
-  const_iterator begin() const { return data(); }
-
-  // FixedArray::cbegin()
-  //
-  // Returns a const iterator to the beginning of the fixed array.
-  const_iterator cbegin() const { return begin(); }
-
-  // FixedArray::end()
-  //
-  // Returns an iterator to the end of the fixed array.
-  iterator end() { return data() + size(); }
-
-  // Overload of FixedArray::end() to return a const iterator to the end of the
-  // fixed array.
-  const_iterator end() const { return data() + size(); }
-
-  // FixedArray::cend()
-  //
-  // Returns a const iterator to the end of the fixed array.
-  const_iterator cend() const { return end(); }
-
-  // FixedArray::rbegin()
-  //
-  // Returns a reverse iterator from the end of the fixed array.
-  reverse_iterator rbegin() { return reverse_iterator(end()); }
-
-  // Overload of FixedArray::rbegin() to return a const reverse iterator from
-  // the end of the fixed array.
-  const_reverse_iterator rbegin() const {
-    return const_reverse_iterator(end());
-  }
-
-  // FixedArray::crbegin()
-  //
-  // Returns a const reverse iterator from the end of the fixed array.
-  const_reverse_iterator crbegin() const { return rbegin(); }
-
-  // FixedArray::rend()
-  //
-  // Returns a reverse iterator from the beginning of the fixed array.
-  reverse_iterator rend() { return reverse_iterator(begin()); }
-
-  // Overload of FixedArray::rend() for returning a const reverse iterator
-  // from the beginning of the fixed array.
-  const_reverse_iterator rend() const {
-    return const_reverse_iterator(begin());
-  }
-
-  // FixedArray::crend()
-  //
-  // Returns a reverse iterator from the beginning of the fixed array.
-  const_reverse_iterator crend() const { return rend(); }
-
-  // FixedArray::fill()
-  //
-  // Assigns the given `value` to all elements in the fixed array.
-  void fill(const value_type& val) { std::fill(begin(), end(), val); }
-
-  // Relational operators. Equality operators are elementwise using
-  // `operator==`, while order operators order FixedArrays lexicographically.
-  friend bool operator==(const FixedArray& lhs, const FixedArray& rhs) {
-    return absl::equal(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
-  }
-
-  friend bool operator!=(const FixedArray& lhs, const FixedArray& rhs) {
-    return !(lhs == rhs);
-  }
-
-  friend bool operator<(const FixedArray& lhs, const FixedArray& rhs) {
-    return std::lexicographical_compare(lhs.begin(), lhs.end(), rhs.begin(),
-                                        rhs.end());
-  }
-
-  friend bool operator>(const FixedArray& lhs, const FixedArray& rhs) {
-    return rhs < lhs;
-  }
-
-  friend bool operator<=(const FixedArray& lhs, const FixedArray& rhs) {
-    return !(rhs < lhs);
-  }
-
-  friend bool operator>=(const FixedArray& lhs, const FixedArray& rhs) {
-    return !(lhs < rhs);
-  }
-
-  template <typename H>
-  friend H AbslHashValue(H h, const FixedArray& v) {
-    return H::combine(H::combine_contiguous(std::move(h), v.data(), v.size()),
-                      v.size());
-  }
-
- private:
-  // StorageElement
-  //
-  // For FixedArrays with a C-style-array value_type, StorageElement is a POD
-  // wrapper struct called StorageElementWrapper that holds the value_type
-  // instance inside. This is needed for construction and destruction of the
-  // entire array regardless of how many dimensions it has. For all other cases,
-  // StorageElement is just an alias of value_type.
-  //
-  // Maintainer's Note: The simpler solution would be to simply wrap value_type
-  // in a struct whether it's an array or not. That causes some paranoid
-  // diagnostics to misfire, believing that 'data()' returns a pointer to a
-  // single element, rather than the packed array that it really is.
-  // e.g.:
-  //
-  //     FixedArray<char> buf(1);
-  //     sprintf(buf.data(), "foo");
-  //
-  //     error: call to int __builtin___sprintf_chk(etc...)
-  //     will always overflow destination buffer [-Werror]
-  //
-  template <typename OuterT, typename InnerT = absl::remove_extent_t<OuterT>,
-            size_t InnerN = std::extent<OuterT>::value>
-  struct StorageElementWrapper {
-    InnerT array[InnerN];
-  };
-
-  using StorageElement =
-      absl::conditional_t<std::is_array<value_type>::value,
-                          StorageElementWrapper<value_type>, value_type>;
-
-  static pointer AsValueType(pointer ptr) { return ptr; }
-  static pointer AsValueType(StorageElementWrapper<value_type>* ptr) {
-    return std::addressof(ptr->array);
-  }
-
-  static_assert(sizeof(StorageElement) == sizeof(value_type), "");
-  static_assert(alignof(StorageElement) == alignof(value_type), "");
-
-  class NonEmptyInlinedStorage {
-   public:
-    StorageElement* data() { return reinterpret_cast<StorageElement*>(buff_); }
-    void AnnotateConstruct(size_type n);
-    void AnnotateDestruct(size_type n);
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-    void* RedzoneBegin() { return &redzone_begin_; }
-    void* RedzoneEnd() { return &redzone_end_ + 1; }
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-
-   private:
-    ABSL_ADDRESS_SANITIZER_REDZONE(redzone_begin_);
-    alignas(StorageElement) char buff_[sizeof(StorageElement[inline_elements])];
-    ABSL_ADDRESS_SANITIZER_REDZONE(redzone_end_);
-  };
-
-  class EmptyInlinedStorage {
-   public:
-    StorageElement* data() { return nullptr; }
-    void AnnotateConstruct(size_type) {}
-    void AnnotateDestruct(size_type) {}
-  };
-
-  using InlinedStorage =
-      absl::conditional_t<inline_elements == 0, EmptyInlinedStorage,
-                          NonEmptyInlinedStorage>;
-
-  // Storage
-  //
-  // An instance of Storage manages the inline and out-of-line memory for
-  // instances of FixedArray. This guarantees that even when construction of
-  // individual elements fails in the FixedArray constructor body, the
-  // destructor for Storage will still be called and out-of-line memory will be
-  // properly deallocated.
-  //
-  class Storage : public InlinedStorage {
-   public:
-    Storage(size_type n, const allocator_type& a)
-        : size_alloc_(n, a), data_(InitializeData()) {}
-
-    ~Storage() noexcept {
-      if (UsingInlinedStorage(size())) {
-        InlinedStorage::AnnotateDestruct(size());
-      } else {
-        AllocatorTraits::deallocate(alloc(), AsValueType(begin()), size());
-      }
-    }
-
-    size_type size() const { return size_alloc_.template get<0>(); }
-    StorageElement* begin() const { return data_; }
-    StorageElement* end() const { return begin() + size(); }
-    allocator_type& alloc() { return size_alloc_.template get<1>(); }
-
-   private:
-    static bool UsingInlinedStorage(size_type n) {
-      return n <= inline_elements;
-    }
-
-    StorageElement* InitializeData() {
-      if (UsingInlinedStorage(size())) {
-        InlinedStorage::AnnotateConstruct(size());
-        return InlinedStorage::data();
-      } else {
-        return reinterpret_cast<StorageElement*>(
-            AllocatorTraits::allocate(alloc(), size()));
-      }
-    }
-
-    // `CompressedTuple` takes advantage of EBCO for stateless `allocator_type`s
-    container_internal::CompressedTuple<size_type, allocator_type> size_alloc_;
-    StorageElement* data_;
-  };
-
-  Storage storage_;
-};
-
-template <typename T, size_t N, typename A>
-constexpr size_t FixedArray<T, N, A>::kInlineBytesDefault;
-
-template <typename T, size_t N, typename A>
-constexpr typename FixedArray<T, N, A>::size_type
-    FixedArray<T, N, A>::inline_elements;
-
-template <typename T, size_t N, typename A>
-void FixedArray<T, N, A>::NonEmptyInlinedStorage::AnnotateConstruct(
-    typename FixedArray<T, N, A>::size_type n) {
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-  if (!n) return;
-  ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(data(), RedzoneEnd(), RedzoneEnd(),
-                                     data() + n);
-  ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(RedzoneBegin(), data(), data(),
-                                     RedzoneBegin());
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-  static_cast<void>(n);  // Mark used when not in asan mode
-}
-
-template <typename T, size_t N, typename A>
-void FixedArray<T, N, A>::NonEmptyInlinedStorage::AnnotateDestruct(
-    typename FixedArray<T, N, A>::size_type n) {
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-  if (!n) return;
-  ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(data(), RedzoneEnd(), data() + n,
-                                     RedzoneEnd());
-  ABSL_ANNOTATE_CONTIGUOUS_CONTAINER(RedzoneBegin(), data(), RedzoneBegin(),
-                                     data());
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-  static_cast<void>(n);  // Mark used when not in asan mode
-}
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_FIXED_ARRAY_H_
diff --git a/third_party/abseil/absl/container/fixed_array_benchmark.cc b/third_party/abseil/absl/container/fixed_array_benchmark.cc
deleted file mode 100644
index 3c7a5a7..0000000
--- a/third_party/abseil/absl/container/fixed_array_benchmark.cc
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <stddef.h>
-
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "absl/container/fixed_array.h"
-
-namespace {
-
-// For benchmarking -- simple class with constructor and destructor that
-// set an int to a constant..
-class SimpleClass {
- public:
-  SimpleClass() : i(3) {}
-  ~SimpleClass() { i = 0; }
-
- private:
-  int i;
-};
-
-template <typename C, size_t stack_size>
-void BM_FixedArray(benchmark::State& state) {
-  const int size = state.range(0);
-  for (auto _ : state) {
-    absl::FixedArray<C, stack_size> fa(size);
-    benchmark::DoNotOptimize(fa.data());
-  }
-}
-BENCHMARK_TEMPLATE(BM_FixedArray, char, absl::kFixedArrayUseDefault)
-    ->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, char, 0)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, char, 1)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, char, 16)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, char, 256)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, char, 65536)->Range(0, 1 << 16);
-
-BENCHMARK_TEMPLATE(BM_FixedArray, SimpleClass, absl::kFixedArrayUseDefault)
-    ->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, SimpleClass, 0)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, SimpleClass, 1)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, SimpleClass, 16)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, SimpleClass, 256)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, SimpleClass, 65536)->Range(0, 1 << 16);
-
-BENCHMARK_TEMPLATE(BM_FixedArray, std::string, absl::kFixedArrayUseDefault)
-    ->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, std::string, 0)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, std::string, 1)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, std::string, 16)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, std::string, 256)->Range(0, 1 << 16);
-BENCHMARK_TEMPLATE(BM_FixedArray, std::string, 65536)->Range(0, 1 << 16);
-
-}  // namespace
diff --git a/third_party/abseil/absl/container/fixed_array_exception_safety_test.cc b/third_party/abseil/absl/container/fixed_array_exception_safety_test.cc
deleted file mode 100644
index e5f5929..0000000
--- a/third_party/abseil/absl/container/fixed_array_exception_safety_test.cc
+++ /dev/null
@@ -1,201 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/base/config.h"
-#include "absl/container/fixed_array.h"
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#include <initializer_list>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/exception_safety_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-constexpr size_t kInlined = 25;
-constexpr size_t kSmallSize = kInlined / 2;
-constexpr size_t kLargeSize = kInlined * 2;
-
-constexpr int kInitialValue = 5;
-constexpr int kUpdatedValue = 10;
-
-using ::testing::TestThrowingCtor;
-
-using Thrower = testing::ThrowingValue<testing::TypeSpec::kEverythingThrows>;
-using ThrowAlloc =
-    testing::ThrowingAllocator<Thrower, testing::AllocSpec::kEverythingThrows>;
-using MoveThrower = testing::ThrowingValue<testing::TypeSpec::kNoThrowMove>;
-using MoveThrowAlloc =
-    testing::ThrowingAllocator<MoveThrower,
-                               testing::AllocSpec::kEverythingThrows>;
-
-using FixedArr = absl::FixedArray<Thrower, kInlined>;
-using FixedArrWithAlloc = absl::FixedArray<Thrower, kInlined, ThrowAlloc>;
-
-using MoveFixedArr = absl::FixedArray<MoveThrower, kInlined>;
-using MoveFixedArrWithAlloc =
-    absl::FixedArray<MoveThrower, kInlined, MoveThrowAlloc>;
-
-TEST(FixedArrayExceptionSafety, CopyConstructor) {
-  auto small = FixedArr(kSmallSize);
-  TestThrowingCtor<FixedArr>(small);
-
-  auto large = FixedArr(kLargeSize);
-  TestThrowingCtor<FixedArr>(large);
-}
-
-TEST(FixedArrayExceptionSafety, CopyConstructorWithAlloc) {
-  auto small = FixedArrWithAlloc(kSmallSize);
-  TestThrowingCtor<FixedArrWithAlloc>(small);
-
-  auto large = FixedArrWithAlloc(kLargeSize);
-  TestThrowingCtor<FixedArrWithAlloc>(large);
-}
-
-TEST(FixedArrayExceptionSafety, MoveConstructor) {
-  TestThrowingCtor<FixedArr>(FixedArr(kSmallSize));
-  TestThrowingCtor<FixedArr>(FixedArr(kLargeSize));
-
-  // TypeSpec::kNoThrowMove
-  TestThrowingCtor<MoveFixedArr>(MoveFixedArr(kSmallSize));
-  TestThrowingCtor<MoveFixedArr>(MoveFixedArr(kLargeSize));
-}
-
-TEST(FixedArrayExceptionSafety, MoveConstructorWithAlloc) {
-  TestThrowingCtor<FixedArrWithAlloc>(FixedArrWithAlloc(kSmallSize));
-  TestThrowingCtor<FixedArrWithAlloc>(FixedArrWithAlloc(kLargeSize));
-
-  // TypeSpec::kNoThrowMove
-  TestThrowingCtor<MoveFixedArrWithAlloc>(MoveFixedArrWithAlloc(kSmallSize));
-  TestThrowingCtor<MoveFixedArrWithAlloc>(MoveFixedArrWithAlloc(kLargeSize));
-}
-
-TEST(FixedArrayExceptionSafety, SizeConstructor) {
-  TestThrowingCtor<FixedArr>(kSmallSize);
-  TestThrowingCtor<FixedArr>(kLargeSize);
-}
-
-TEST(FixedArrayExceptionSafety, SizeConstructorWithAlloc) {
-  TestThrowingCtor<FixedArrWithAlloc>(kSmallSize);
-  TestThrowingCtor<FixedArrWithAlloc>(kLargeSize);
-}
-
-TEST(FixedArrayExceptionSafety, SizeValueConstructor) {
-  TestThrowingCtor<FixedArr>(kSmallSize, Thrower());
-  TestThrowingCtor<FixedArr>(kLargeSize, Thrower());
-}
-
-TEST(FixedArrayExceptionSafety, SizeValueConstructorWithAlloc) {
-  TestThrowingCtor<FixedArrWithAlloc>(kSmallSize, Thrower());
-  TestThrowingCtor<FixedArrWithAlloc>(kLargeSize, Thrower());
-}
-
-TEST(FixedArrayExceptionSafety, IteratorConstructor) {
-  auto small = FixedArr(kSmallSize);
-  TestThrowingCtor<FixedArr>(small.begin(), small.end());
-
-  auto large = FixedArr(kLargeSize);
-  TestThrowingCtor<FixedArr>(large.begin(), large.end());
-}
-
-TEST(FixedArrayExceptionSafety, IteratorConstructorWithAlloc) {
-  auto small = FixedArrWithAlloc(kSmallSize);
-  TestThrowingCtor<FixedArrWithAlloc>(small.begin(), small.end());
-
-  auto large = FixedArrWithAlloc(kLargeSize);
-  TestThrowingCtor<FixedArrWithAlloc>(large.begin(), large.end());
-}
-
-TEST(FixedArrayExceptionSafety, InitListConstructor) {
-  constexpr int small_inlined = 3;
-  using SmallFixedArr = absl::FixedArray<Thrower, small_inlined>;
-
-  TestThrowingCtor<SmallFixedArr>(std::initializer_list<Thrower>{});
-  // Test inlined allocation
-  TestThrowingCtor<SmallFixedArr>(
-      std::initializer_list<Thrower>{Thrower{}, Thrower{}});
-  // Test out of line allocation
-  TestThrowingCtor<SmallFixedArr>(std::initializer_list<Thrower>{
-      Thrower{}, Thrower{}, Thrower{}, Thrower{}, Thrower{}});
-}
-
-TEST(FixedArrayExceptionSafety, InitListConstructorWithAlloc) {
-  constexpr int small_inlined = 3;
-  using SmallFixedArrWithAlloc =
-      absl::FixedArray<Thrower, small_inlined, ThrowAlloc>;
-
-  TestThrowingCtor<SmallFixedArrWithAlloc>(std::initializer_list<Thrower>{});
-  // Test inlined allocation
-  TestThrowingCtor<SmallFixedArrWithAlloc>(
-      std::initializer_list<Thrower>{Thrower{}, Thrower{}});
-  // Test out of line allocation
-  TestThrowingCtor<SmallFixedArrWithAlloc>(std::initializer_list<Thrower>{
-      Thrower{}, Thrower{}, Thrower{}, Thrower{}, Thrower{}});
-}
-
-template <typename FixedArrT>
-testing::AssertionResult ReadMemory(FixedArrT* fixed_arr) {
-  int sum = 0;
-  for (const auto& thrower : *fixed_arr) {
-    sum += thrower.Get();
-  }
-  return testing::AssertionSuccess() << "Values sum to [" << sum << "]";
-}
-
-TEST(FixedArrayExceptionSafety, Fill) {
-  auto test_fill = testing::MakeExceptionSafetyTester()
-                       .WithContracts(ReadMemory<FixedArr>)
-                       .WithOperation([&](FixedArr* fixed_arr_ptr) {
-                         auto thrower =
-                             Thrower(kUpdatedValue, testing::nothrow_ctor);
-                         fixed_arr_ptr->fill(thrower);
-                       });
-
-  EXPECT_TRUE(
-      test_fill.WithInitialValue(FixedArr(kSmallSize, Thrower(kInitialValue)))
-          .Test());
-  EXPECT_TRUE(
-      test_fill.WithInitialValue(FixedArr(kLargeSize, Thrower(kInitialValue)))
-          .Test());
-}
-
-TEST(FixedArrayExceptionSafety, FillWithAlloc) {
-  auto test_fill = testing::MakeExceptionSafetyTester()
-                       .WithContracts(ReadMemory<FixedArrWithAlloc>)
-                       .WithOperation([&](FixedArrWithAlloc* fixed_arr_ptr) {
-                         auto thrower =
-                             Thrower(kUpdatedValue, testing::nothrow_ctor);
-                         fixed_arr_ptr->fill(thrower);
-                       });
-
-  EXPECT_TRUE(test_fill
-                  .WithInitialValue(
-                      FixedArrWithAlloc(kSmallSize, Thrower(kInitialValue)))
-                  .Test());
-  EXPECT_TRUE(test_fill
-                  .WithInitialValue(
-                      FixedArrWithAlloc(kLargeSize, Thrower(kInitialValue)))
-                  .Test());
-}
-
-}  // namespace
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HAVE_EXCEPTIONS
diff --git a/third_party/abseil/absl/container/fixed_array_test.cc b/third_party/abseil/absl/container/fixed_array_test.cc
deleted file mode 100644
index 49598e7..0000000
--- a/third_party/abseil/absl/container/fixed_array_test.cc
+++ /dev/null
@@ -1,837 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/fixed_array.h"
-
-#include <stdio.h>
-
-#include <cstring>
-#include <list>
-#include <memory>
-#include <numeric>
-#include <scoped_allocator>
-#include <stdexcept>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/exception_testing.h"
-#include "absl/base/options.h"
-#include "absl/container/internal/counting_allocator.h"
-#include "absl/hash/hash_testing.h"
-#include "absl/memory/memory.h"
-
-using ::testing::ElementsAreArray;
-
-namespace {
-
-// Helper routine to determine if a absl::FixedArray used stack allocation.
-template <typename ArrayType>
-static bool IsOnStack(const ArrayType& a) {
-  return a.size() <= ArrayType::inline_elements;
-}
-
-class ConstructionTester {
- public:
-  ConstructionTester() : self_ptr_(this), value_(0) { constructions++; }
-  ~ConstructionTester() {
-    assert(self_ptr_ == this);
-    self_ptr_ = nullptr;
-    destructions++;
-  }
-
-  // These are incremented as elements are constructed and destructed so we can
-  // be sure all elements are properly cleaned up.
-  static int constructions;
-  static int destructions;
-
-  void CheckConstructed() { assert(self_ptr_ == this); }
-
-  void set(int value) { value_ = value; }
-  int get() { return value_; }
-
- private:
-  // self_ptr_ should always point to 'this' -- that's how we can be sure the
-  // constructor has been called.
-  ConstructionTester* self_ptr_;
-  int value_;
-};
-
-int ConstructionTester::constructions = 0;
-int ConstructionTester::destructions = 0;
-
-// ThreeInts will initialize its three ints to the value stored in
-// ThreeInts::counter. The constructor increments counter so that each object
-// in an array of ThreeInts will have different values.
-class ThreeInts {
- public:
-  ThreeInts() {
-    x_ = counter;
-    y_ = counter;
-    z_ = counter;
-    ++counter;
-  }
-
-  static int counter;
-
-  int x_, y_, z_;
-};
-
-int ThreeInts::counter = 0;
-
-TEST(FixedArrayTest, CopyCtor) {
-  absl::FixedArray<int, 10> on_stack(5);
-  std::iota(on_stack.begin(), on_stack.end(), 0);
-  absl::FixedArray<int, 10> stack_copy = on_stack;
-  EXPECT_THAT(stack_copy, ElementsAreArray(on_stack));
-  EXPECT_TRUE(IsOnStack(stack_copy));
-
-  absl::FixedArray<int, 10> allocated(15);
-  std::iota(allocated.begin(), allocated.end(), 0);
-  absl::FixedArray<int, 10> alloced_copy = allocated;
-  EXPECT_THAT(alloced_copy, ElementsAreArray(allocated));
-  EXPECT_FALSE(IsOnStack(alloced_copy));
-}
-
-TEST(FixedArrayTest, MoveCtor) {
-  absl::FixedArray<std::unique_ptr<int>, 10> on_stack(5);
-  for (int i = 0; i < 5; ++i) {
-    on_stack[i] = absl::make_unique<int>(i);
-  }
-
-  absl::FixedArray<std::unique_ptr<int>, 10> stack_copy = std::move(on_stack);
-  for (int i = 0; i < 5; ++i) EXPECT_EQ(*(stack_copy[i]), i);
-  EXPECT_EQ(stack_copy.size(), on_stack.size());
-
-  absl::FixedArray<std::unique_ptr<int>, 10> allocated(15);
-  for (int i = 0; i < 15; ++i) {
-    allocated[i] = absl::make_unique<int>(i);
-  }
-
-  absl::FixedArray<std::unique_ptr<int>, 10> alloced_copy =
-      std::move(allocated);
-  for (int i = 0; i < 15; ++i) EXPECT_EQ(*(alloced_copy[i]), i);
-  EXPECT_EQ(allocated.size(), alloced_copy.size());
-}
-
-TEST(FixedArrayTest, SmallObjects) {
-  // Small object arrays
-  {
-    // Short arrays should be on the stack
-    absl::FixedArray<int> array(4);
-    EXPECT_TRUE(IsOnStack(array));
-  }
-
-  {
-    // Large arrays should be on the heap
-    absl::FixedArray<int> array(1048576);
-    EXPECT_FALSE(IsOnStack(array));
-  }
-
-  {
-    // Arrays of <= default size should be on the stack
-    absl::FixedArray<int, 100> array(100);
-    EXPECT_TRUE(IsOnStack(array));
-  }
-
-  {
-    // Arrays of > default size should be on the heap
-    absl::FixedArray<int, 100> array(101);
-    EXPECT_FALSE(IsOnStack(array));
-  }
-
-  {
-    // Arrays with different size elements should use approximately
-    // same amount of stack space
-    absl::FixedArray<int> array1(0);
-    absl::FixedArray<char> array2(0);
-    EXPECT_LE(sizeof(array1), sizeof(array2) + 100);
-    EXPECT_LE(sizeof(array2), sizeof(array1) + 100);
-  }
-
-  {
-    // Ensure that vectors are properly constructed inside a fixed array.
-    absl::FixedArray<std::vector<int>> array(2);
-    EXPECT_EQ(0, array[0].size());
-    EXPECT_EQ(0, array[1].size());
-  }
-
-  {
-    // Regardless of absl::FixedArray implementation, check that a type with a
-    // low alignment requirement and a non power-of-two size is initialized
-    // correctly.
-    ThreeInts::counter = 1;
-    absl::FixedArray<ThreeInts> array(2);
-    EXPECT_EQ(1, array[0].x_);
-    EXPECT_EQ(1, array[0].y_);
-    EXPECT_EQ(1, array[0].z_);
-    EXPECT_EQ(2, array[1].x_);
-    EXPECT_EQ(2, array[1].y_);
-    EXPECT_EQ(2, array[1].z_);
-  }
-}
-
-TEST(FixedArrayTest, AtThrows) {
-  absl::FixedArray<int> a = {1, 2, 3};
-  EXPECT_EQ(a.at(2), 3);
-  ABSL_BASE_INTERNAL_EXPECT_FAIL(a.at(3), std::out_of_range,
-                                 "failed bounds check");
-}
-
-TEST(FixedArrayTest, Hardened) {
-#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
-  absl::FixedArray<int> a = {1, 2, 3};
-  EXPECT_EQ(a[2], 3);
-  EXPECT_DEATH_IF_SUPPORTED(a[3], "");
-  EXPECT_DEATH_IF_SUPPORTED(a[-1], "");
-
-  absl::FixedArray<int> empty(0);
-  EXPECT_DEATH_IF_SUPPORTED(empty[0], "");
-  EXPECT_DEATH_IF_SUPPORTED(empty[-1], "");
-  EXPECT_DEATH_IF_SUPPORTED(empty.front(), "");
-  EXPECT_DEATH_IF_SUPPORTED(empty.back(), "");
-#endif
-}
-
-TEST(FixedArrayRelationalsTest, EqualArrays) {
-  for (int i = 0; i < 10; ++i) {
-    absl::FixedArray<int, 5> a1(i);
-    std::iota(a1.begin(), a1.end(), 0);
-    absl::FixedArray<int, 5> a2(a1.begin(), a1.end());
-
-    EXPECT_TRUE(a1 == a2);
-    EXPECT_FALSE(a1 != a2);
-    EXPECT_TRUE(a2 == a1);
-    EXPECT_FALSE(a2 != a1);
-    EXPECT_FALSE(a1 < a2);
-    EXPECT_FALSE(a1 > a2);
-    EXPECT_FALSE(a2 < a1);
-    EXPECT_FALSE(a2 > a1);
-    EXPECT_TRUE(a1 <= a2);
-    EXPECT_TRUE(a1 >= a2);
-    EXPECT_TRUE(a2 <= a1);
-    EXPECT_TRUE(a2 >= a1);
-  }
-}
-
-TEST(FixedArrayRelationalsTest, UnequalArrays) {
-  for (int i = 1; i < 10; ++i) {
-    absl::FixedArray<int, 5> a1(i);
-    std::iota(a1.begin(), a1.end(), 0);
-    absl::FixedArray<int, 5> a2(a1.begin(), a1.end());
-    --a2[i / 2];
-
-    EXPECT_FALSE(a1 == a2);
-    EXPECT_TRUE(a1 != a2);
-    EXPECT_FALSE(a2 == a1);
-    EXPECT_TRUE(a2 != a1);
-    EXPECT_FALSE(a1 < a2);
-    EXPECT_TRUE(a1 > a2);
-    EXPECT_TRUE(a2 < a1);
-    EXPECT_FALSE(a2 > a1);
-    EXPECT_FALSE(a1 <= a2);
-    EXPECT_TRUE(a1 >= a2);
-    EXPECT_TRUE(a2 <= a1);
-    EXPECT_FALSE(a2 >= a1);
-  }
-}
-
-template <int stack_elements>
-static void TestArray(int n) {
-  SCOPED_TRACE(n);
-  SCOPED_TRACE(stack_elements);
-  ConstructionTester::constructions = 0;
-  ConstructionTester::destructions = 0;
-  {
-    absl::FixedArray<ConstructionTester, stack_elements> array(n);
-
-    EXPECT_THAT(array.size(), n);
-    EXPECT_THAT(array.memsize(), sizeof(ConstructionTester) * n);
-    EXPECT_THAT(array.begin() + n, array.end());
-
-    // Check that all elements were constructed
-    for (int i = 0; i < n; i++) {
-      array[i].CheckConstructed();
-    }
-    // Check that no other elements were constructed
-    EXPECT_THAT(ConstructionTester::constructions, n);
-
-    // Test operator[]
-    for (int i = 0; i < n; i++) {
-      array[i].set(i);
-    }
-    for (int i = 0; i < n; i++) {
-      EXPECT_THAT(array[i].get(), i);
-      EXPECT_THAT(array.data()[i].get(), i);
-    }
-
-    // Test data()
-    for (int i = 0; i < n; i++) {
-      array.data()[i].set(i + 1);
-    }
-    for (int i = 0; i < n; i++) {
-      EXPECT_THAT(array[i].get(), i + 1);
-      EXPECT_THAT(array.data()[i].get(), i + 1);
-    }
-  }  // Close scope containing 'array'.
-
-  // Check that all constructed elements were destructed.
-  EXPECT_EQ(ConstructionTester::constructions,
-            ConstructionTester::destructions);
-}
-
-template <int elements_per_inner_array, int inline_elements>
-static void TestArrayOfArrays(int n) {
-  SCOPED_TRACE(n);
-  SCOPED_TRACE(inline_elements);
-  SCOPED_TRACE(elements_per_inner_array);
-  ConstructionTester::constructions = 0;
-  ConstructionTester::destructions = 0;
-  {
-    using InnerArray = ConstructionTester[elements_per_inner_array];
-    // Heap-allocate the FixedArray to avoid blowing the stack frame.
-    auto array_ptr =
-        absl::make_unique<absl::FixedArray<InnerArray, inline_elements>>(n);
-    auto& array = *array_ptr;
-
-    ASSERT_EQ(array.size(), n);
-    ASSERT_EQ(array.memsize(),
-              sizeof(ConstructionTester) * elements_per_inner_array * n);
-    ASSERT_EQ(array.begin() + n, array.end());
-
-    // Check that all elements were constructed
-    for (int i = 0; i < n; i++) {
-      for (int j = 0; j < elements_per_inner_array; j++) {
-        (array[i])[j].CheckConstructed();
-      }
-    }
-    // Check that no other elements were constructed
-    ASSERT_EQ(ConstructionTester::constructions, n * elements_per_inner_array);
-
-    // Test operator[]
-    for (int i = 0; i < n; i++) {
-      for (int j = 0; j < elements_per_inner_array; j++) {
-        (array[i])[j].set(i * elements_per_inner_array + j);
-      }
-    }
-    for (int i = 0; i < n; i++) {
-      for (int j = 0; j < elements_per_inner_array; j++) {
-        ASSERT_EQ((array[i])[j].get(), i * elements_per_inner_array + j);
-        ASSERT_EQ((array.data()[i])[j].get(), i * elements_per_inner_array + j);
-      }
-    }
-
-    // Test data()
-    for (int i = 0; i < n; i++) {
-      for (int j = 0; j < elements_per_inner_array; j++) {
-        (array.data()[i])[j].set((i + 1) * elements_per_inner_array + j);
-      }
-    }
-    for (int i = 0; i < n; i++) {
-      for (int j = 0; j < elements_per_inner_array; j++) {
-        ASSERT_EQ((array[i])[j].get(), (i + 1) * elements_per_inner_array + j);
-        ASSERT_EQ((array.data()[i])[j].get(),
-                  (i + 1) * elements_per_inner_array + j);
-      }
-    }
-  }  // Close scope containing 'array'.
-
-  // Check that all constructed elements were destructed.
-  EXPECT_EQ(ConstructionTester::constructions,
-            ConstructionTester::destructions);
-}
-
-TEST(IteratorConstructorTest, NonInline) {
-  int const kInput[] = {2, 3, 5, 7, 11, 13, 17};
-  absl::FixedArray<int, ABSL_ARRAYSIZE(kInput) - 1> const fixed(
-      kInput, kInput + ABSL_ARRAYSIZE(kInput));
-  ASSERT_EQ(ABSL_ARRAYSIZE(kInput), fixed.size());
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(kInput); ++i) {
-    ASSERT_EQ(kInput[i], fixed[i]);
-  }
-}
-
-TEST(IteratorConstructorTest, Inline) {
-  int const kInput[] = {2, 3, 5, 7, 11, 13, 17};
-  absl::FixedArray<int, ABSL_ARRAYSIZE(kInput)> const fixed(
-      kInput, kInput + ABSL_ARRAYSIZE(kInput));
-  ASSERT_EQ(ABSL_ARRAYSIZE(kInput), fixed.size());
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(kInput); ++i) {
-    ASSERT_EQ(kInput[i], fixed[i]);
-  }
-}
-
-TEST(IteratorConstructorTest, NonPod) {
-  char const* kInput[] = {"red",  "orange", "yellow", "green",
-                          "blue", "indigo", "violet"};
-  absl::FixedArray<std::string> const fixed(kInput,
-                                            kInput + ABSL_ARRAYSIZE(kInput));
-  ASSERT_EQ(ABSL_ARRAYSIZE(kInput), fixed.size());
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(kInput); ++i) {
-    ASSERT_EQ(kInput[i], fixed[i]);
-  }
-}
-
-TEST(IteratorConstructorTest, FromEmptyVector) {
-  std::vector<int> const empty;
-  absl::FixedArray<int> const fixed(empty.begin(), empty.end());
-  EXPECT_EQ(0, fixed.size());
-  EXPECT_EQ(empty.size(), fixed.size());
-}
-
-TEST(IteratorConstructorTest, FromNonEmptyVector) {
-  int const kInput[] = {2, 3, 5, 7, 11, 13, 17};
-  std::vector<int> const items(kInput, kInput + ABSL_ARRAYSIZE(kInput));
-  absl::FixedArray<int> const fixed(items.begin(), items.end());
-  ASSERT_EQ(items.size(), fixed.size());
-  for (size_t i = 0; i < items.size(); ++i) {
-    ASSERT_EQ(items[i], fixed[i]);
-  }
-}
-
-TEST(IteratorConstructorTest, FromBidirectionalIteratorRange) {
-  int const kInput[] = {2, 3, 5, 7, 11, 13, 17};
-  std::list<int> const items(kInput, kInput + ABSL_ARRAYSIZE(kInput));
-  absl::FixedArray<int> const fixed(items.begin(), items.end());
-  EXPECT_THAT(fixed, testing::ElementsAreArray(kInput));
-}
-
-TEST(InitListConstructorTest, InitListConstruction) {
-  absl::FixedArray<int> fixed = {1, 2, 3};
-  EXPECT_THAT(fixed, testing::ElementsAreArray({1, 2, 3}));
-}
-
-TEST(FillConstructorTest, NonEmptyArrays) {
-  absl::FixedArray<int> stack_array(4, 1);
-  EXPECT_THAT(stack_array, testing::ElementsAreArray({1, 1, 1, 1}));
-
-  absl::FixedArray<int, 0> heap_array(4, 1);
-  EXPECT_THAT(stack_array, testing::ElementsAreArray({1, 1, 1, 1}));
-}
-
-TEST(FillConstructorTest, EmptyArray) {
-  absl::FixedArray<int> empty_fill(0, 1);
-  absl::FixedArray<int> empty_size(0);
-  EXPECT_EQ(empty_fill, empty_size);
-}
-
-TEST(FillConstructorTest, NotTriviallyCopyable) {
-  std::string str = "abcd";
-  absl::FixedArray<std::string> strings = {str, str, str, str};
-
-  absl::FixedArray<std::string> array(4, str);
-  EXPECT_EQ(array, strings);
-}
-
-TEST(FillConstructorTest, Disambiguation) {
-  absl::FixedArray<size_t> a(1, 2);
-  EXPECT_THAT(a, testing::ElementsAre(2));
-}
-
-TEST(FixedArrayTest, ManySizedArrays) {
-  std::vector<int> sizes;
-  for (int i = 1; i < 100; i++) sizes.push_back(i);
-  for (int i = 100; i <= 1000; i += 100) sizes.push_back(i);
-  for (int n : sizes) {
-    TestArray<0>(n);
-    TestArray<1>(n);
-    TestArray<64>(n);
-    TestArray<1000>(n);
-  }
-}
-
-TEST(FixedArrayTest, ManySizedArraysOfArraysOf1) {
-  for (int n = 1; n < 1000; n++) {
-    ASSERT_NO_FATAL_FAILURE((TestArrayOfArrays<1, 0>(n)));
-    ASSERT_NO_FATAL_FAILURE((TestArrayOfArrays<1, 1>(n)));
-    ASSERT_NO_FATAL_FAILURE((TestArrayOfArrays<1, 64>(n)));
-    ASSERT_NO_FATAL_FAILURE((TestArrayOfArrays<1, 1000>(n)));
-  }
-}
-
-TEST(FixedArrayTest, ManySizedArraysOfArraysOf2) {
-  for (int n = 1; n < 1000; n++) {
-    TestArrayOfArrays<2, 0>(n);
-    TestArrayOfArrays<2, 1>(n);
-    TestArrayOfArrays<2, 64>(n);
-    TestArrayOfArrays<2, 1000>(n);
-  }
-}
-
-// If value_type is put inside of a struct container,
-// we might evoke this error in a hardened build unless data() is carefully
-// written, so check on that.
-//     error: call to int __builtin___sprintf_chk(etc...)
-//     will always overflow destination buffer [-Werror]
-TEST(FixedArrayTest, AvoidParanoidDiagnostics) {
-  absl::FixedArray<char, 32> buf(32);
-  sprintf(buf.data(), "foo");  // NOLINT(runtime/printf)
-}
-
-TEST(FixedArrayTest, TooBigInlinedSpace) {
-  struct TooBig {
-    char c[1 << 20];
-  };  // too big for even one on the stack
-
-  // Simulate the data members of absl::FixedArray, a pointer and a size_t.
-  struct Data {
-    TooBig* p;
-    size_t size;
-  };
-
-  // Make sure TooBig objects are not inlined for 0 or default size.
-  static_assert(sizeof(absl::FixedArray<TooBig, 0>) == sizeof(Data),
-                "0-sized absl::FixedArray should have same size as Data.");
-  static_assert(alignof(absl::FixedArray<TooBig, 0>) == alignof(Data),
-                "0-sized absl::FixedArray should have same alignment as Data.");
-  static_assert(sizeof(absl::FixedArray<TooBig>) == sizeof(Data),
-                "default-sized absl::FixedArray should have same size as Data");
-  static_assert(
-      alignof(absl::FixedArray<TooBig>) == alignof(Data),
-      "default-sized absl::FixedArray should have same alignment as Data.");
-}
-
-// PickyDelete EXPECTs its class-scope deallocation funcs are unused.
-struct PickyDelete {
-  PickyDelete() {}
-  ~PickyDelete() {}
-  void operator delete(void* p) {
-    EXPECT_TRUE(false) << __FUNCTION__;
-    ::operator delete(p);
-  }
-  void operator delete[](void* p) {
-    EXPECT_TRUE(false) << __FUNCTION__;
-    ::operator delete[](p);
-  }
-};
-
-TEST(FixedArrayTest, UsesGlobalAlloc) { absl::FixedArray<PickyDelete, 0> a(5); }
-
-TEST(FixedArrayTest, Data) {
-  static const int kInput[] = {2, 3, 5, 7, 11, 13, 17};
-  absl::FixedArray<int> fa(std::begin(kInput), std::end(kInput));
-  EXPECT_EQ(fa.data(), &*fa.begin());
-  EXPECT_EQ(fa.data(), &fa[0]);
-
-  const absl::FixedArray<int>& cfa = fa;
-  EXPECT_EQ(cfa.data(), &*cfa.begin());
-  EXPECT_EQ(cfa.data(), &cfa[0]);
-}
-
-TEST(FixedArrayTest, Empty) {
-  absl::FixedArray<int> empty(0);
-  absl::FixedArray<int> inline_filled(1);
-  absl::FixedArray<int, 0> heap_filled(1);
-  EXPECT_TRUE(empty.empty());
-  EXPECT_FALSE(inline_filled.empty());
-  EXPECT_FALSE(heap_filled.empty());
-}
-
-TEST(FixedArrayTest, FrontAndBack) {
-  absl::FixedArray<int, 3 * sizeof(int)> inlined = {1, 2, 3};
-  EXPECT_EQ(inlined.front(), 1);
-  EXPECT_EQ(inlined.back(), 3);
-
-  absl::FixedArray<int, 0> allocated = {1, 2, 3};
-  EXPECT_EQ(allocated.front(), 1);
-  EXPECT_EQ(allocated.back(), 3);
-
-  absl::FixedArray<int> one_element = {1};
-  EXPECT_EQ(one_element.front(), one_element.back());
-}
-
-TEST(FixedArrayTest, ReverseIteratorInlined) {
-  absl::FixedArray<int, 5 * sizeof(int)> a = {0, 1, 2, 3, 4};
-
-  int counter = 5;
-  for (absl::FixedArray<int>::reverse_iterator iter = a.rbegin();
-       iter != a.rend(); ++iter) {
-    counter--;
-    EXPECT_EQ(counter, *iter);
-  }
-  EXPECT_EQ(counter, 0);
-
-  counter = 5;
-  for (absl::FixedArray<int>::const_reverse_iterator iter = a.rbegin();
-       iter != a.rend(); ++iter) {
-    counter--;
-    EXPECT_EQ(counter, *iter);
-  }
-  EXPECT_EQ(counter, 0);
-
-  counter = 5;
-  for (auto iter = a.crbegin(); iter != a.crend(); ++iter) {
-    counter--;
-    EXPECT_EQ(counter, *iter);
-  }
-  EXPECT_EQ(counter, 0);
-}
-
-TEST(FixedArrayTest, ReverseIteratorAllocated) {
-  absl::FixedArray<int, 0> a = {0, 1, 2, 3, 4};
-
-  int counter = 5;
-  for (absl::FixedArray<int>::reverse_iterator iter = a.rbegin();
-       iter != a.rend(); ++iter) {
-    counter--;
-    EXPECT_EQ(counter, *iter);
-  }
-  EXPECT_EQ(counter, 0);
-
-  counter = 5;
-  for (absl::FixedArray<int>::const_reverse_iterator iter = a.rbegin();
-       iter != a.rend(); ++iter) {
-    counter--;
-    EXPECT_EQ(counter, *iter);
-  }
-  EXPECT_EQ(counter, 0);
-
-  counter = 5;
-  for (auto iter = a.crbegin(); iter != a.crend(); ++iter) {
-    counter--;
-    EXPECT_EQ(counter, *iter);
-  }
-  EXPECT_EQ(counter, 0);
-}
-
-TEST(FixedArrayTest, Fill) {
-  absl::FixedArray<int, 5 * sizeof(int)> inlined(5);
-  int fill_val = 42;
-  inlined.fill(fill_val);
-  for (int i : inlined) EXPECT_EQ(i, fill_val);
-
-  absl::FixedArray<int, 0> allocated(5);
-  allocated.fill(fill_val);
-  for (int i : allocated) EXPECT_EQ(i, fill_val);
-
-  // It doesn't do anything, just make sure this compiles.
-  absl::FixedArray<int> empty(0);
-  empty.fill(fill_val);
-}
-
-#ifndef __GNUC__
-TEST(FixedArrayTest, DefaultCtorDoesNotValueInit) {
-  using T = char;
-  constexpr auto capacity = 10;
-  using FixedArrType = absl::FixedArray<T, capacity>;
-  constexpr auto scrubbed_bits = 0x95;
-  constexpr auto length = capacity / 2;
-
-  alignas(FixedArrType) unsigned char buff[sizeof(FixedArrType)];
-  std::memset(std::addressof(buff), scrubbed_bits, sizeof(FixedArrType));
-
-  FixedArrType* arr =
-      ::new (static_cast<void*>(std::addressof(buff))) FixedArrType(length);
-  EXPECT_THAT(*arr, testing::Each(scrubbed_bits));
-  arr->~FixedArrType();
-}
-#endif  // __GNUC__
-
-TEST(AllocatorSupportTest, CountInlineAllocations) {
-  constexpr size_t inlined_size = 4;
-  using Alloc = absl::container_internal::CountingAllocator<int>;
-  using AllocFxdArr = absl::FixedArray<int, inlined_size, Alloc>;
-
-  int64_t allocated = 0;
-  int64_t active_instances = 0;
-
-  {
-    const int ia[] = {0, 1, 2, 3, 4, 5, 6, 7};
-
-    Alloc alloc(&allocated, &active_instances);
-
-    AllocFxdArr arr(ia, ia + inlined_size, alloc);
-    static_cast<void>(arr);
-  }
-
-  EXPECT_EQ(allocated, 0);
-  EXPECT_EQ(active_instances, 0);
-}
-
-TEST(AllocatorSupportTest, CountOutoflineAllocations) {
-  constexpr size_t inlined_size = 4;
-  using Alloc = absl::container_internal::CountingAllocator<int>;
-  using AllocFxdArr = absl::FixedArray<int, inlined_size, Alloc>;
-
-  int64_t allocated = 0;
-  int64_t active_instances = 0;
-
-  {
-    const int ia[] = {0, 1, 2, 3, 4, 5, 6, 7};
-    Alloc alloc(&allocated, &active_instances);
-
-    AllocFxdArr arr(ia, ia + ABSL_ARRAYSIZE(ia), alloc);
-
-    EXPECT_EQ(allocated, arr.size() * sizeof(int));
-    static_cast<void>(arr);
-  }
-
-  EXPECT_EQ(active_instances, 0);
-}
-
-TEST(AllocatorSupportTest, CountCopyInlineAllocations) {
-  constexpr size_t inlined_size = 4;
-  using Alloc = absl::container_internal::CountingAllocator<int>;
-  using AllocFxdArr = absl::FixedArray<int, inlined_size, Alloc>;
-
-  int64_t allocated1 = 0;
-  int64_t allocated2 = 0;
-  int64_t active_instances = 0;
-  Alloc alloc(&allocated1, &active_instances);
-  Alloc alloc2(&allocated2, &active_instances);
-
-  {
-    int initial_value = 1;
-
-    AllocFxdArr arr1(inlined_size / 2, initial_value, alloc);
-
-    EXPECT_EQ(allocated1, 0);
-
-    AllocFxdArr arr2(arr1, alloc2);
-
-    EXPECT_EQ(allocated2, 0);
-    static_cast<void>(arr1);
-    static_cast<void>(arr2);
-  }
-
-  EXPECT_EQ(active_instances, 0);
-}
-
-TEST(AllocatorSupportTest, CountCopyOutoflineAllocations) {
-  constexpr size_t inlined_size = 4;
-  using Alloc = absl::container_internal::CountingAllocator<int>;
-  using AllocFxdArr = absl::FixedArray<int, inlined_size, Alloc>;
-
-  int64_t allocated1 = 0;
-  int64_t allocated2 = 0;
-  int64_t active_instances = 0;
-  Alloc alloc(&allocated1, &active_instances);
-  Alloc alloc2(&allocated2, &active_instances);
-
-  {
-    int initial_value = 1;
-
-    AllocFxdArr arr1(inlined_size * 2, initial_value, alloc);
-
-    EXPECT_EQ(allocated1, arr1.size() * sizeof(int));
-
-    AllocFxdArr arr2(arr1, alloc2);
-
-    EXPECT_EQ(allocated2, inlined_size * 2 * sizeof(int));
-    static_cast<void>(arr1);
-    static_cast<void>(arr2);
-  }
-
-  EXPECT_EQ(active_instances, 0);
-}
-
-TEST(AllocatorSupportTest, SizeValAllocConstructor) {
-  using testing::AllOf;
-  using testing::Each;
-  using testing::SizeIs;
-
-  constexpr size_t inlined_size = 4;
-  using Alloc = absl::container_internal::CountingAllocator<int>;
-  using AllocFxdArr = absl::FixedArray<int, inlined_size, Alloc>;
-
-  {
-    auto len = inlined_size / 2;
-    auto val = 0;
-    int64_t allocated = 0;
-    AllocFxdArr arr(len, val, Alloc(&allocated));
-
-    EXPECT_EQ(allocated, 0);
-    EXPECT_THAT(arr, AllOf(SizeIs(len), Each(0)));
-  }
-
-  {
-    auto len = inlined_size * 2;
-    auto val = 0;
-    int64_t allocated = 0;
-    AllocFxdArr arr(len, val, Alloc(&allocated));
-
-    EXPECT_EQ(allocated, len * sizeof(int));
-    EXPECT_THAT(arr, AllOf(SizeIs(len), Each(0)));
-  }
-}
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-TEST(FixedArrayTest, AddressSanitizerAnnotations1) {
-  absl::FixedArray<int, 32> a(10);
-  int* raw = a.data();
-  raw[0] = 0;
-  raw[9] = 0;
-  EXPECT_DEATH_IF_SUPPORTED(raw[-2] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[-1] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[10] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[31] = 0, "container-overflow");
-}
-
-TEST(FixedArrayTest, AddressSanitizerAnnotations2) {
-  absl::FixedArray<char, 17> a(12);
-  char* raw = a.data();
-  raw[0] = 0;
-  raw[11] = 0;
-  EXPECT_DEATH_IF_SUPPORTED(raw[-7] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[-1] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[12] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[17] = 0, "container-overflow");
-}
-
-TEST(FixedArrayTest, AddressSanitizerAnnotations3) {
-  absl::FixedArray<uint64_t, 20> a(20);
-  uint64_t* raw = a.data();
-  raw[0] = 0;
-  raw[19] = 0;
-  EXPECT_DEATH_IF_SUPPORTED(raw[-1] = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[20] = 0, "container-overflow");
-}
-
-TEST(FixedArrayTest, AddressSanitizerAnnotations4) {
-  absl::FixedArray<ThreeInts> a(10);
-  ThreeInts* raw = a.data();
-  raw[0] = ThreeInts();
-  raw[9] = ThreeInts();
-  // Note: raw[-1] is pointing to 12 bytes before the container range. However,
-  // there is only a 8-byte red zone before the container range, so we only
-  // access the last 4 bytes of the struct to make sure it stays within the red
-  // zone.
-  EXPECT_DEATH_IF_SUPPORTED(raw[-1].z_ = 0, "container-overflow");
-  EXPECT_DEATH_IF_SUPPORTED(raw[10] = ThreeInts(), "container-overflow");
-  // The actual size of storage is kDefaultBytes=256, 21*12 = 252,
-  // so reading raw[21] should still trigger the correct warning.
-  EXPECT_DEATH_IF_SUPPORTED(raw[21] = ThreeInts(), "container-overflow");
-}
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-
-TEST(FixedArrayTest, AbslHashValueWorks) {
-  using V = absl::FixedArray<int>;
-  std::vector<V> cases;
-
-  // Generate a variety of vectors some of these are small enough for the inline
-  // space but are stored out of line.
-  for (int i = 0; i < 10; ++i) {
-    V v(i);
-    for (int j = 0; j < i; ++j) {
-      v[j] = j;
-    }
-    cases.push_back(v);
-  }
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(cases));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/container/flat_hash_map.h b/third_party/abseil/absl/container/flat_hash_map.h
deleted file mode 100644
index 74def0d..0000000
--- a/third_party/abseil/absl/container/flat_hash_map.h
+++ /dev/null
@@ -1,606 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: flat_hash_map.h
-// -----------------------------------------------------------------------------
-//
-// An `absl::flat_hash_map<K, V>` is an unordered associative container of
-// unique keys and associated values designed to be a more efficient replacement
-// for `std::unordered_map`. Like `unordered_map`, search, insertion, and
-// deletion of map elements can be done as an `O(1)` operation. However,
-// `flat_hash_map` (and other unordered associative containers known as the
-// collection of Abseil "Swiss tables") contain other optimizations that result
-// in both memory and computation advantages.
-//
-// In most cases, your default choice for a hash map should be a map of type
-// `flat_hash_map`.
-
-#ifndef ABSL_CONTAINER_FLAT_HASH_MAP_H_
-#define ABSL_CONTAINER_FLAT_HASH_MAP_H_
-
-#include <cstddef>
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "absl/algorithm/container.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
-#include "absl/container/internal/raw_hash_map.h"  // IWYU pragma: export
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-template <class K, class V>
-struct FlatHashMapPolicy;
-}  // namespace container_internal
-
-// -----------------------------------------------------------------------------
-// absl::flat_hash_map
-// -----------------------------------------------------------------------------
-//
-// An `absl::flat_hash_map<K, V>` is an unordered associative container which
-// has been optimized for both speed and memory footprint in most common use
-// cases. Its interface is similar to that of `std::unordered_map<K, V>` with
-// the following notable differences:
-//
-// * Requires keys that are CopyConstructible
-// * Requires values that are MoveConstructible
-// * Supports heterogeneous lookup, through `find()`, `operator[]()` and
-//   `insert()`, provided that the map is provided a compatible heterogeneous
-//   hashing function and equality operator.
-// * Invalidates any references and pointers to elements within the table after
-//   `rehash()`.
-// * Contains a `capacity()` member function indicating the number of element
-//   slots (open, deleted, and empty) within the hash map.
-// * Returns `void` from the `erase(iterator)` overload.
-//
-// By default, `flat_hash_map` uses the `absl::Hash` hashing framework.
-// All fundamental and Abseil types that support the `absl::Hash` framework have
-// a compatible equality operator for comparing insertions into `flat_hash_map`.
-// If your type is not yet supported by the `absl::Hash` framework, see
-// absl/hash/hash.h for information on extending Abseil hashing to user-defined
-// types.
-//
-// NOTE: A `flat_hash_map` stores its value types directly inside its
-// implementation array to avoid memory indirection. Because a `flat_hash_map`
-// is designed to move data when rehashed, map values will not retain pointer
-// stability. If you require pointer stability, or if your values are large,
-// consider using `absl::flat_hash_map<Key, std::unique_ptr<Value>>` instead.
-// If your types are not moveable or you require pointer stability for keys,
-// consider `absl::node_hash_map`.
-//
-// Example:
-//
-//   // Create a flat hash map of three strings (that map to strings)
-//   absl::flat_hash_map<std::string, std::string> ducks =
-//     {{"a", "huey"}, {"b", "dewey"}, {"c", "louie"}};
-//
-//  // Insert a new element into the flat hash map
-//  ducks.insert({"d", "donald"});
-//
-//  // Force a rehash of the flat hash map
-//  ducks.rehash(0);
-//
-//  // Find the element with the key "b"
-//  std::string search_key = "b";
-//  auto result = ducks.find(search_key);
-//  if (result != ducks.end()) {
-//    std::cout << "Result: " << result->second << std::endl;
-//  }
-template <class K, class V,
-          class Hash = absl::container_internal::hash_default_hash<K>,
-          class Eq = absl::container_internal::hash_default_eq<K>,
-          class Allocator = std::allocator<std::pair<const K, V>>>
-class flat_hash_map : public absl::container_internal::raw_hash_map<
-                          absl::container_internal::FlatHashMapPolicy<K, V>,
-                          Hash, Eq, Allocator> {
-  using Base = typename flat_hash_map::raw_hash_map;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A flat_hash_map supports the same overload set as `std::unordered_map`
-  // for construction and assignment:
-  //
-  // *  Default constructor
-  //
-  //    // No allocation for the table's elements is made.
-  //    absl::flat_hash_map<int, std::string> map1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::flat_hash_map<int, std::string> map2 =
-  //       {{1, "huey"}, {2, "dewey"}, {3, "louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::flat_hash_map<int, std::string> map3(map2);
-  //
-  // * Copy assignment operator
-  //
-  //  // Hash functor and Comparator are copied as well
-  //  absl::flat_hash_map<int, std::string> map4;
-  //  map4 = map3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::flat_hash_map<int, std::string> map5(std::move(map4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::flat_hash_map<int, std::string> map6;
-  //   map6 = std::move(map5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::pair<int, std::string>> v = {{1, "a"}, {2, "b"}};
-  //   absl::flat_hash_map<int, std::string> map7(v.begin(), v.end());
-  flat_hash_map() {}
-  using Base::Base;
-
-  // flat_hash_map::begin()
-  //
-  // Returns an iterator to the beginning of the `flat_hash_map`.
-  using Base::begin;
-
-  // flat_hash_map::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `flat_hash_map`.
-  using Base::cbegin;
-
-  // flat_hash_map::cend()
-  //
-  // Returns a const iterator to the end of the `flat_hash_map`.
-  using Base::cend;
-
-  // flat_hash_map::end()
-  //
-  // Returns an iterator to the end of the `flat_hash_map`.
-  using Base::end;
-
-  // flat_hash_map::capacity()
-  //
-  // Returns the number of element slots (assigned, deleted, and empty)
-  // available within the `flat_hash_map`.
-  //
-  // NOTE: this member function is particular to `absl::flat_hash_map` and is
-  // not provided in the `std::unordered_map` API.
-  using Base::capacity;
-
-  // flat_hash_map::empty()
-  //
-  // Returns whether or not the `flat_hash_map` is empty.
-  using Base::empty;
-
-  // flat_hash_map::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `flat_hash_map` under current memory constraints. This value can be thought
-  // of the largest value of `std::distance(begin(), end())` for a
-  // `flat_hash_map<K, V>`.
-  using Base::max_size;
-
-  // flat_hash_map::size()
-  //
-  // Returns the number of elements currently within the `flat_hash_map`.
-  using Base::size;
-
-  // flat_hash_map::clear()
-  //
-  // Removes all elements from the `flat_hash_map`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  //
-  // NOTE: this operation may shrink the underlying buffer. To avoid shrinking
-  // the underlying buffer call `erase(begin(), end())`.
-  using Base::clear;
-
-  // flat_hash_map::erase()
-  //
-  // Erases elements within the `flat_hash_map`. Erasing does not trigger a
-  // rehash. Overloads are listed below.
-  //
-  // void erase(const_iterator pos):
-  //
-  //   Erases the element at `position` of the `flat_hash_map`, returning
-  //   `void`.
-  //
-  //   NOTE: returning `void` in this case is different than that of STL
-  //   containers in general and `std::unordered_map` in particular (which
-  //   return an iterator to the element following the erased element). If that
-  //   iterator is needed, simply post increment the iterator:
-  //
-  //     map.erase(it++);
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning an
-  //   iterator pointing to `last`.
-  //
-  // size_type erase(const key_type& key):
-  //
-  //   Erases the element with the matching key, if it exists, returning the
-  //   number of elements erased (0 or 1).
-  using Base::erase;
-
-  // flat_hash_map::insert()
-  //
-  // Inserts an element of the specified value into the `flat_hash_map`,
-  // returning an iterator pointing to the newly inserted element, provided that
-  // an element with the given key does not already exist. If rehashing occurs
-  // due to the insertion, all iterators are invalidated. Overloads are listed
-  // below.
-  //
-  // std::pair<iterator,bool> insert(const init_type& value):
-  //
-  //   Inserts a value into the `flat_hash_map`. Returns a pair consisting of an
-  //   iterator to the inserted element (or to the element that prevented the
-  //   insertion) and a bool denoting whether the insertion took place.
-  //
-  // std::pair<iterator,bool> insert(T&& value):
-  // std::pair<iterator,bool> insert(init_type&& value):
-  //
-  //   Inserts a moveable value into the `flat_hash_map`. Returns a pair
-  //   consisting of an iterator to the inserted element (or to the element that
-  //   prevented the insertion) and a bool denoting whether the insertion took
-  //   place.
-  //
-  // iterator insert(const_iterator hint, const init_type& value):
-  // iterator insert(const_iterator hint, T&& value):
-  // iterator insert(const_iterator hint, init_type&& value);
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element, or to the existing element that prevented the
-  //   insertion.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently, for `flat_hash_map` we guarantee the
-  //   first match is inserted.
-  //
-  // void insert(std::initializer_list<init_type> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently within the initializer list, for
-  //   `flat_hash_map` we guarantee the first match is inserted.
-  using Base::insert;
-
-  // flat_hash_map::insert_or_assign()
-  //
-  // Inserts an element of the specified value into the `flat_hash_map` provided
-  // that a value with the given key does not already exist, or replaces it with
-  // the element value if a key for that value already exists, returning an
-  // iterator pointing to the newly inserted element.  If rehashing occurs due
-  // to the insertion, all existing iterators are invalidated. Overloads are
-  // listed below.
-  //
-  // pair<iterator, bool> insert_or_assign(const init_type& k, T&& obj):
-  // pair<iterator, bool> insert_or_assign(init_type&& k, T&& obj):
-  //
-  //   Inserts/Assigns (or moves) the element of the specified key into the
-  //   `flat_hash_map`.
-  //
-  // iterator insert_or_assign(const_iterator hint,
-  //                           const init_type& k, T&& obj):
-  // iterator insert_or_assign(const_iterator hint, init_type&& k, T&& obj):
-  //
-  //   Inserts/Assigns (or moves) the element of the specified key into the
-  //   `flat_hash_map` using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search.
-  using Base::insert_or_assign;
-
-  // flat_hash_map::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `flat_hash_map`, provided that no element with the given key
-  // already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately. Prefer `try_emplace()` unless your key is not
-  // copyable or moveable.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace;
-
-  // flat_hash_map::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `flat_hash_map`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search, and only inserts
-  // provided that no element with the given key already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately. Prefer `try_emplace()` unless your key is not
-  // copyable or moveable.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace_hint;
-
-  // flat_hash_map::try_emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `flat_hash_map`, provided that no element with the given key
-  // already exists. Unlike `emplace()`, if an element with the given key
-  // already exists, we guarantee that no element is constructed.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  // Overloads are listed below.
-  //
-  //   pair<iterator, bool> try_emplace(const key_type& k, Args&&... args):
-  //   pair<iterator, bool> try_emplace(key_type&& k, Args&&... args):
-  //
-  // Inserts (via copy or move) the element of the specified key into the
-  // `flat_hash_map`.
-  //
-  //   iterator try_emplace(const_iterator hint,
-  //                        const init_type& k, Args&&... args):
-  //   iterator try_emplace(const_iterator hint, init_type&& k, Args&&... args):
-  //
-  // Inserts (via copy or move) the element of the specified key into the
-  // `flat_hash_map` using the position of `hint` as a non-binding suggestion
-  // for where to begin the insertion search.
-  //
-  // All `try_emplace()` overloads make the same guarantees regarding rvalue
-  // arguments as `std::unordered_map::try_emplace()`, namely that these
-  // functions will not move from rvalue arguments if insertions do not happen.
-  using Base::try_emplace;
-
-  // flat_hash_map::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the key,value pair of the element at the indicated position and
-  //   returns a node handle owning that extracted data.
-  //
-  // node_type extract(const key_type& x):
-  //
-  //   Extracts the key,value pair of the element with a key matching the passed
-  //   key value and returns a node handle owning that extracted data. If the
-  //   `flat_hash_map` does not contain an element with a matching key, this
-  //   function returns an empty node handle.
-  //
-  // NOTE: when compiled in an earlier version of C++ than C++17,
-  // `node_type::key()` returns a const reference to the key instead of a
-  // mutable reference. We cannot safely return a mutable reference without
-  // std::launder (which is not available before C++17).
-  using Base::extract;
-
-  // flat_hash_map::merge()
-  //
-  // Extracts elements from a given `source` flat hash map into this
-  // `flat_hash_map`. If the destination `flat_hash_map` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // flat_hash_map::swap(flat_hash_map& other)
-  //
-  // Exchanges the contents of this `flat_hash_map` with those of the `other`
-  // flat hash map, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
-  //
-  // All iterators and references on the `flat_hash_map` remain valid, excepting
-  // for the past-the-end iterator, which is invalidated.
-  //
-  // `swap()` requires that the flat hash map's hashing and key equivalence
-  // functions be Swappable, and are exchanged using unqualified calls to
-  // non-member `swap()`. If the map's allocator has
-  // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value`
-  // set to `true`, the allocators are also exchanged using an unqualified call
-  // to non-member `swap()`; otherwise, the allocators are not swapped.
-  using Base::swap;
-
-  // flat_hash_map::rehash(count)
-  //
-  // Rehashes the `flat_hash_map`, setting the number of slots to be at least
-  // the passed value. If the new number of slots increases the load factor more
-  // than the current maximum load factor
-  // (`count` < `size()` / `max_load_factor()`), then the new number of slots
-  // will be at least `size()` / `max_load_factor()`.
-  //
-  // To force a rehash, pass rehash(0).
-  //
-  // NOTE: unlike behavior in `std::unordered_map`, references are also
-  // invalidated upon a `rehash()`.
-  using Base::rehash;
-
-  // flat_hash_map::reserve(count)
-  //
-  // Sets the number of slots in the `flat_hash_map` to the number needed to
-  // accommodate at least `count` total elements without exceeding the current
-  // maximum load factor, and may rehash the container if needed.
-  using Base::reserve;
-
-  // flat_hash_map::at()
-  //
-  // Returns a reference to the mapped value of the element with key equivalent
-  // to the passed key.
-  using Base::at;
-
-  // flat_hash_map::contains()
-  //
-  // Determines whether an element with a key comparing equal to the given `key`
-  // exists within the `flat_hash_map`, returning `true` if so or `false`
-  // otherwise.
-  using Base::contains;
-
-  // flat_hash_map::count(const Key& key) const
-  //
-  // Returns the number of elements with a key comparing equal to the given
-  // `key` within the `flat_hash_map`. note that this function will return
-  // either `1` or `0` since duplicate keys are not allowed within a
-  // `flat_hash_map`.
-  using Base::count;
-
-  // flat_hash_map::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `flat_hash_map`.
-  using Base::equal_range;
-
-  // flat_hash_map::find()
-  //
-  // Finds an element with the passed `key` within the `flat_hash_map`.
-  using Base::find;
-
-  // flat_hash_map::operator[]()
-  //
-  // Returns a reference to the value mapped to the passed key within the
-  // `flat_hash_map`, performing an `insert()` if the key does not already
-  // exist.
-  //
-  // If an insertion occurs and results in a rehashing of the container, all
-  // iterators are invalidated. Otherwise iterators are not affected and
-  // references are not invalidated. Overloads are listed below.
-  //
-  // T& operator[](const Key& key):
-  //
-  //   Inserts an init_type object constructed in-place if the element with the
-  //   given key does not exist.
-  //
-  // T& operator[](Key&& key):
-  //
-  //   Inserts an init_type object constructed in-place provided that an element
-  //   with the given key does not exist.
-  using Base::operator[];
-
-  // flat_hash_map::bucket_count()
-  //
-  // Returns the number of "buckets" within the `flat_hash_map`. Note that
-  // because a flat hash map contains all elements within its internal storage,
-  // this value simply equals the current capacity of the `flat_hash_map`.
-  using Base::bucket_count;
-
-  // flat_hash_map::load_factor()
-  //
-  // Returns the current load factor of the `flat_hash_map` (the average number
-  // of slots occupied with a value within the hash map).
-  using Base::load_factor;
-
-  // flat_hash_map::max_load_factor()
-  //
-  // Manages the maximum load factor of the `flat_hash_map`. Overloads are
-  // listed below.
-  //
-  // float flat_hash_map::max_load_factor()
-  //
-  //   Returns the current maximum load factor of the `flat_hash_map`.
-  //
-  // void flat_hash_map::max_load_factor(float ml)
-  //
-  //   Sets the maximum load factor of the `flat_hash_map` to the passed value.
-  //
-  //   NOTE: This overload is provided only for API compatibility with the STL;
-  //   `flat_hash_map` will ignore any set load factor and manage its rehashing
-  //   internally as an implementation detail.
-  using Base::max_load_factor;
-
-  // flat_hash_map::get_allocator()
-  //
-  // Returns the allocator function associated with this `flat_hash_map`.
-  using Base::get_allocator;
-
-  // flat_hash_map::hash_function()
-  //
-  // Returns the hashing function used to hash the keys within this
-  // `flat_hash_map`.
-  using Base::hash_function;
-
-  // flat_hash_map::key_eq()
-  //
-  // Returns the function used for comparing keys equality.
-  using Base::key_eq;
-};
-
-// erase_if(flat_hash_map<>, Pred)
-//
-// Erases all elements that satisfy the predicate `pred` from the container `c`.
-template <typename K, typename V, typename H, typename E, typename A,
-          typename Predicate>
-void erase_if(flat_hash_map<K, V, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
-}
-
-namespace container_internal {
-
-template <class K, class V>
-struct FlatHashMapPolicy {
-  using slot_policy = container_internal::map_slot_policy<K, V>;
-  using slot_type = typename slot_policy::slot_type;
-  using key_type = K;
-  using mapped_type = V;
-  using init_type = std::pair</*non const*/ key_type, mapped_type>;
-
-  template <class Allocator, class... Args>
-  static void construct(Allocator* alloc, slot_type* slot, Args&&... args) {
-    slot_policy::construct(alloc, slot, std::forward<Args>(args)...);
-  }
-
-  template <class Allocator>
-  static void destroy(Allocator* alloc, slot_type* slot) {
-    slot_policy::destroy(alloc, slot);
-  }
-
-  template <class Allocator>
-  static void transfer(Allocator* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    slot_policy::transfer(alloc, new_slot, old_slot);
-  }
-
-  template <class F, class... Args>
-  static decltype(absl::container_internal::DecomposePair(
-      std::declval<F>(), std::declval<Args>()...))
-  apply(F&& f, Args&&... args) {
-    return absl::container_internal::DecomposePair(std::forward<F>(f),
-                                                   std::forward<Args>(args)...);
-  }
-
-  static size_t space_used(const slot_type*) { return 0; }
-
-  static std::pair<const K, V>& element(slot_type* slot) { return slot->value; }
-
-  static V& value(std::pair<const K, V>* kv) { return kv->second; }
-  static const V& value(const std::pair<const K, V>* kv) { return kv->second; }
-};
-
-}  // namespace container_internal
-
-namespace container_algorithm_internal {
-
-// Specialization of trait in absl/algorithm/container.h
-template <class Key, class T, class Hash, class KeyEqual, class Allocator>
-struct IsUnorderedContainer<
-    absl::flat_hash_map<Key, T, Hash, KeyEqual, Allocator>> : std::true_type {};
-
-}  // namespace container_algorithm_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_FLAT_HASH_MAP_H_
diff --git a/third_party/abseil/absl/container/flat_hash_map_test.cc b/third_party/abseil/absl/container/flat_hash_map_test.cc
deleted file mode 100644
index 89ec60c..0000000
--- a/third_party/abseil/absl/container/flat_hash_map_test.cc
+++ /dev/null
@@ -1,288 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/flat_hash_map.h"
-
-#include <memory>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/unordered_map_constructor_test.h"
-#include "absl/container/internal/unordered_map_lookup_test.h"
-#include "absl/container/internal/unordered_map_members_test.h"
-#include "absl/container/internal/unordered_map_modifiers_test.h"
-#include "absl/types/any.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-using ::absl::container_internal::hash_internal::Enum;
-using ::absl::container_internal::hash_internal::EnumClass;
-using ::testing::_;
-using ::testing::IsEmpty;
-using ::testing::Pair;
-using ::testing::UnorderedElementsAre;
-
-// Check that absl::flat_hash_map works in a global constructor.
-struct BeforeMain {
-  BeforeMain() {
-    absl::flat_hash_map<int, int> x;
-    x.insert({1, 1});
-    ABSL_RAW_CHECK(x.find(0) == x.end(), "x should not contain 0");
-    auto it = x.find(1);
-    ABSL_RAW_CHECK(it != x.end(), "x should contain 1");
-    ABSL_RAW_CHECK(it->second, "1 should map to 1");
-  }
-};
-const BeforeMain before_main;
-
-template <class K, class V>
-using Map = flat_hash_map<K, V, StatefulTestingHash, StatefulTestingEqual,
-                          Alloc<std::pair<const K, V>>>;
-
-static_assert(!std::is_standard_layout<NonStandardLayout>(), "");
-
-using MapTypes =
-    ::testing::Types<Map<int, int>, Map<std::string, int>,
-                     Map<Enum, std::string>, Map<EnumClass, int>,
-                     Map<int, NonStandardLayout>, Map<NonStandardLayout, int>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashMap, ConstructorTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashMap, LookupTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashMap, MembersTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashMap, ModifiersTest, MapTypes);
-
-using UniquePtrMapTypes = ::testing::Types<Map<int, std::unique_ptr<int>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashMap, UniquePtrModifiersTest,
-                               UniquePtrMapTypes);
-
-TEST(FlatHashMap, StandardLayout) {
-  struct Int {
-    explicit Int(size_t value) : value(value) {}
-    Int() : value(0) { ADD_FAILURE(); }
-    Int(const Int& other) : value(other.value) { ADD_FAILURE(); }
-    Int(Int&&) = default;
-    bool operator==(const Int& other) const { return value == other.value; }
-    size_t value;
-  };
-  static_assert(std::is_standard_layout<Int>(), "");
-
-  struct Hash {
-    size_t operator()(const Int& obj) const { return obj.value; }
-  };
-
-  // Verify that neither the key nor the value get default-constructed or
-  // copy-constructed.
-  {
-    flat_hash_map<Int, Int, Hash> m;
-    m.try_emplace(Int(1), Int(2));
-    m.try_emplace(Int(3), Int(4));
-    m.erase(Int(1));
-    m.rehash(2 * m.bucket_count());
-  }
-  {
-    flat_hash_map<Int, Int, Hash> m;
-    m.try_emplace(Int(1), Int(2));
-    m.try_emplace(Int(3), Int(4));
-    m.erase(Int(1));
-    m.clear();
-  }
-}
-
-// gcc becomes unhappy if this is inside the method, so pull it out here.
-struct balast {};
-
-TEST(FlatHashMap, IteratesMsan) {
-  // Because SwissTable randomizes on pointer addresses, we keep old tables
-  // around to ensure we don't reuse old memory.
-  std::vector<absl::flat_hash_map<int, balast>> garbage;
-  for (int i = 0; i < 100; ++i) {
-    absl::flat_hash_map<int, balast> t;
-    for (int j = 0; j < 100; ++j) {
-      t[j];
-      for (const auto& p : t) EXPECT_THAT(p, Pair(_, _));
-    }
-    garbage.push_back(std::move(t));
-  }
-}
-
-// Demonstration of the "Lazy Key" pattern.  This uses heterogeneous insert to
-// avoid creating expensive key elements when the item is already present in the
-// map.
-struct LazyInt {
-  explicit LazyInt(size_t value, int* tracker)
-      : value(value), tracker(tracker) {}
-
-  explicit operator size_t() const {
-    ++*tracker;
-    return value;
-  }
-
-  size_t value;
-  int* tracker;
-};
-
-struct Hash {
-  using is_transparent = void;
-  int* tracker;
-  size_t operator()(size_t obj) const {
-    ++*tracker;
-    return obj;
-  }
-  size_t operator()(const LazyInt& obj) const {
-    ++*tracker;
-    return obj.value;
-  }
-};
-
-struct Eq {
-  using is_transparent = void;
-  bool operator()(size_t lhs, size_t rhs) const {
-    return lhs == rhs;
-  }
-  bool operator()(size_t lhs, const LazyInt& rhs) const {
-    return lhs == rhs.value;
-  }
-};
-
-TEST(FlatHashMap, LazyKeyPattern) {
-  // hashes are only guaranteed in opt mode, we use assertions to track internal
-  // state that can cause extra calls to hash.
-  int conversions = 0;
-  int hashes = 0;
-  flat_hash_map<size_t, size_t, Hash, Eq> m(0, Hash{&hashes});
-  m.reserve(3);
-
-  m[LazyInt(1, &conversions)] = 1;
-  EXPECT_THAT(m, UnorderedElementsAre(Pair(1, 1)));
-  EXPECT_EQ(conversions, 1);
-#ifdef NDEBUG
-  EXPECT_EQ(hashes, 1);
-#endif
-
-  m[LazyInt(1, &conversions)] = 2;
-  EXPECT_THAT(m, UnorderedElementsAre(Pair(1, 2)));
-  EXPECT_EQ(conversions, 1);
-#ifdef NDEBUG
-  EXPECT_EQ(hashes, 2);
-#endif
-
-  m.try_emplace(LazyInt(2, &conversions), 3);
-  EXPECT_THAT(m, UnorderedElementsAre(Pair(1, 2), Pair(2, 3)));
-  EXPECT_EQ(conversions, 2);
-#ifdef NDEBUG
-  EXPECT_EQ(hashes, 3);
-#endif
-
-  m.try_emplace(LazyInt(2, &conversions), 4);
-  EXPECT_THAT(m, UnorderedElementsAre(Pair(1, 2), Pair(2, 3)));
-  EXPECT_EQ(conversions, 2);
-#ifdef NDEBUG
-  EXPECT_EQ(hashes, 4);
-#endif
-}
-
-TEST(FlatHashMap, BitfieldArgument) {
-  union {
-    int n : 1;
-  };
-  n = 0;
-  flat_hash_map<int, int> m;
-  m.erase(n);
-  m.count(n);
-  m.prefetch(n);
-  m.find(n);
-  m.contains(n);
-  m.equal_range(n);
-  m.insert_or_assign(n, n);
-  m.insert_or_assign(m.end(), n, n);
-  m.try_emplace(n);
-  m.try_emplace(m.end(), n);
-  m.at(n);
-  m[n];
-}
-
-TEST(FlatHashMap, MergeExtractInsert) {
-  // We can't test mutable keys, or non-copyable keys with flat_hash_map.
-  // Test that the nodes have the proper API.
-  absl::flat_hash_map<int, int> m = {{1, 7}, {2, 9}};
-  auto node = m.extract(1);
-  EXPECT_TRUE(node);
-  EXPECT_EQ(node.key(), 1);
-  EXPECT_EQ(node.mapped(), 7);
-  EXPECT_THAT(m, UnorderedElementsAre(Pair(2, 9)));
-
-  node.mapped() = 17;
-  m.insert(std::move(node));
-  EXPECT_THAT(m, UnorderedElementsAre(Pair(1, 17), Pair(2, 9)));
-}
-
-bool FirstIsEven(std::pair<const int, int> p) { return p.first % 2 == 0; }
-
-TEST(FlatHashMap, EraseIf) {
-  // Erase all elements.
-  {
-    flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return true; });
-    EXPECT_THAT(s, IsEmpty());
-  }
-  // Erase no elements.
-  {
-    flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return false; });
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3),
-                                        Pair(4, 4), Pair(5, 5)));
-  }
-  // Erase specific elements.
-  {
-    flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s,
-             [](std::pair<const int, int> kvp) { return kvp.first % 2 == 1; });
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(2, 2), Pair(4, 4)));
-  }
-  // Predicate is function reference.
-  {
-    flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, FirstIsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
-  }
-  // Predicate is function pointer.
-  {
-    flat_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, &FirstIsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
-  }
-}
-
-// This test requires std::launder for mutable key access in node handles.
-#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
-TEST(FlatHashMap, NodeHandleMutableKeyAccess) {
-  flat_hash_map<std::string, std::string> map;
-
-  map["key1"] = "mapped";
-
-  auto nh = map.extract(map.begin());
-  nh.key().resize(3);
-  map.insert(std::move(nh));
-
-  EXPECT_THAT(map, testing::ElementsAre(Pair("key", "mapped")));
-}
-#endif
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/flat_hash_set.h b/third_party/abseil/absl/container/flat_hash_set.h
deleted file mode 100644
index 6b89da6..0000000
--- a/third_party/abseil/absl/container/flat_hash_set.h
+++ /dev/null
@@ -1,504 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: flat_hash_set.h
-// -----------------------------------------------------------------------------
-//
-// An `absl::flat_hash_set<T>` is an unordered associative container designed to
-// be a more efficient replacement for `std::unordered_set`. Like
-// `unordered_set`, search, insertion, and deletion of set elements can be done
-// as an `O(1)` operation. However, `flat_hash_set` (and other unordered
-// associative containers known as the collection of Abseil "Swiss tables")
-// contain other optimizations that result in both memory and computation
-// advantages.
-//
-// In most cases, your default choice for a hash set should be a set of type
-// `flat_hash_set`.
-#ifndef ABSL_CONTAINER_FLAT_HASH_SET_H_
-#define ABSL_CONTAINER_FLAT_HASH_SET_H_
-
-#include <type_traits>
-#include <utility>
-
-#include "absl/algorithm/container.h"
-#include "absl/base/macros.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
-#include "absl/container/internal/raw_hash_set.h"  // IWYU pragma: export
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-template <typename T>
-struct FlatHashSetPolicy;
-}  // namespace container_internal
-
-// -----------------------------------------------------------------------------
-// absl::flat_hash_set
-// -----------------------------------------------------------------------------
-//
-// An `absl::flat_hash_set<T>` is an unordered associative container which has
-// been optimized for both speed and memory footprint in most common use cases.
-// Its interface is similar to that of `std::unordered_set<T>` with the
-// following notable differences:
-//
-// * Requires keys that are CopyConstructible
-// * Supports heterogeneous lookup, through `find()` and `insert()`, provided
-//   that the set is provided a compatible heterogeneous hashing function and
-//   equality operator.
-// * Invalidates any references and pointers to elements within the table after
-//   `rehash()`.
-// * Contains a `capacity()` member function indicating the number of element
-//   slots (open, deleted, and empty) within the hash set.
-// * Returns `void` from the `erase(iterator)` overload.
-//
-// By default, `flat_hash_set` uses the `absl::Hash` hashing framework. All
-// fundamental and Abseil types that support the `absl::Hash` framework have a
-// compatible equality operator for comparing insertions into `flat_hash_map`.
-// If your type is not yet supported by the `absl::Hash` framework, see
-// absl/hash/hash.h for information on extending Abseil hashing to user-defined
-// types.
-//
-// NOTE: A `flat_hash_set` stores its keys directly inside its implementation
-// array to avoid memory indirection. Because a `flat_hash_set` is designed to
-// move data when rehashed, set keys will not retain pointer stability. If you
-// require pointer stability, consider using
-// `absl::flat_hash_set<std::unique_ptr<T>>`. If your type is not moveable and
-// you require pointer stability, consider `absl::node_hash_set` instead.
-//
-// Example:
-//
-//   // Create a flat hash set of three strings
-//   absl::flat_hash_set<std::string> ducks =
-//     {"huey", "dewey", "louie"};
-//
-//  // Insert a new element into the flat hash set
-//  ducks.insert("donald");
-//
-//  // Force a rehash of the flat hash set
-//  ducks.rehash(0);
-//
-//  // See if "dewey" is present
-//  if (ducks.contains("dewey")) {
-//    std::cout << "We found dewey!" << std::endl;
-//  }
-template <class T, class Hash = absl::container_internal::hash_default_hash<T>,
-          class Eq = absl::container_internal::hash_default_eq<T>,
-          class Allocator = std::allocator<T>>
-class flat_hash_set
-    : public absl::container_internal::raw_hash_set<
-          absl::container_internal::FlatHashSetPolicy<T>, Hash, Eq, Allocator> {
-  using Base = typename flat_hash_set::raw_hash_set;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A flat_hash_set supports the same overload set as `std::unordered_map`
-  // for construction and assignment:
-  //
-  // *  Default constructor
-  //
-  //    // No allocation for the table's elements is made.
-  //    absl::flat_hash_set<std::string> set1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::flat_hash_set<std::string> set2 =
-  //       {{"huey"}, {"dewey"}, {"louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::flat_hash_set<std::string> set3(set2);
-  //
-  // * Copy assignment operator
-  //
-  //  // Hash functor and Comparator are copied as well
-  //  absl::flat_hash_set<std::string> set4;
-  //  set4 = set3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::flat_hash_set<std::string> set5(std::move(set4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::flat_hash_set<std::string> set6;
-  //   set6 = std::move(set5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::string> v = {"a", "b"};
-  //   absl::flat_hash_set<std::string> set7(v.begin(), v.end());
-  flat_hash_set() {}
-  using Base::Base;
-
-  // flat_hash_set::begin()
-  //
-  // Returns an iterator to the beginning of the `flat_hash_set`.
-  using Base::begin;
-
-  // flat_hash_set::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `flat_hash_set`.
-  using Base::cbegin;
-
-  // flat_hash_set::cend()
-  //
-  // Returns a const iterator to the end of the `flat_hash_set`.
-  using Base::cend;
-
-  // flat_hash_set::end()
-  //
-  // Returns an iterator to the end of the `flat_hash_set`.
-  using Base::end;
-
-  // flat_hash_set::capacity()
-  //
-  // Returns the number of element slots (assigned, deleted, and empty)
-  // available within the `flat_hash_set`.
-  //
-  // NOTE: this member function is particular to `absl::flat_hash_set` and is
-  // not provided in the `std::unordered_map` API.
-  using Base::capacity;
-
-  // flat_hash_set::empty()
-  //
-  // Returns whether or not the `flat_hash_set` is empty.
-  using Base::empty;
-
-  // flat_hash_set::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `flat_hash_set` under current memory constraints. This value can be thought
-  // of the largest value of `std::distance(begin(), end())` for a
-  // `flat_hash_set<T>`.
-  using Base::max_size;
-
-  // flat_hash_set::size()
-  //
-  // Returns the number of elements currently within the `flat_hash_set`.
-  using Base::size;
-
-  // flat_hash_set::clear()
-  //
-  // Removes all elements from the `flat_hash_set`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  //
-  // NOTE: this operation may shrink the underlying buffer. To avoid shrinking
-  // the underlying buffer call `erase(begin(), end())`.
-  using Base::clear;
-
-  // flat_hash_set::erase()
-  //
-  // Erases elements within the `flat_hash_set`. Erasing does not trigger a
-  // rehash. Overloads are listed below.
-  //
-  // void erase(const_iterator pos):
-  //
-  //   Erases the element at `position` of the `flat_hash_set`, returning
-  //   `void`.
-  //
-  //   NOTE: returning `void` in this case is different than that of STL
-  //   containers in general and `std::unordered_set` in particular (which
-  //   return an iterator to the element following the erased element). If that
-  //   iterator is needed, simply post increment the iterator:
-  //
-  //     set.erase(it++);
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning an
-  //   iterator pointing to `last`.
-  //
-  // size_type erase(const key_type& key):
-  //
-  //   Erases the element with the matching key, if it exists, returning the
-  //   number of elements erased (0 or 1).
-  using Base::erase;
-
-  // flat_hash_set::insert()
-  //
-  // Inserts an element of the specified value into the `flat_hash_set`,
-  // returning an iterator pointing to the newly inserted element, provided that
-  // an element with the given key does not already exist. If rehashing occurs
-  // due to the insertion, all iterators are invalidated. Overloads are listed
-  // below.
-  //
-  // std::pair<iterator,bool> insert(const T& value):
-  //
-  //   Inserts a value into the `flat_hash_set`. Returns a pair consisting of an
-  //   iterator to the inserted element (or to the element that prevented the
-  //   insertion) and a bool denoting whether the insertion took place.
-  //
-  // std::pair<iterator,bool> insert(T&& value):
-  //
-  //   Inserts a moveable value into the `flat_hash_set`. Returns a pair
-  //   consisting of an iterator to the inserted element (or to the element that
-  //   prevented the insertion) and a bool denoting whether the insertion took
-  //   place.
-  //
-  // iterator insert(const_iterator hint, const T& value):
-  // iterator insert(const_iterator hint, T&& value):
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element, or to the existing element that prevented the
-  //   insertion.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently, for `flat_hash_set` we guarantee the
-  //   first match is inserted.
-  //
-  // void insert(std::initializer_list<T> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently within the initializer list, for
-  //   `flat_hash_set` we guarantee the first match is inserted.
-  using Base::insert;
-
-  // flat_hash_set::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `flat_hash_set`, provided that no element with the given key
-  // already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace;
-
-  // flat_hash_set::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `flat_hash_set`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search, and only inserts
-  // provided that no element with the given key already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace_hint;
-
-  // flat_hash_set::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the element at the indicated position and returns a node handle
-  //   owning that extracted data.
-  //
-  // node_type extract(const key_type& x):
-  //
-  //   Extracts the element with the key matching the passed key value and
-  //   returns a node handle owning that extracted data. If the `flat_hash_set`
-  //   does not contain an element with a matching key, this function returns an
-  //   empty node handle.
-  using Base::extract;
-
-  // flat_hash_set::merge()
-  //
-  // Extracts elements from a given `source` flat hash set into this
-  // `flat_hash_set`. If the destination `flat_hash_set` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // flat_hash_set::swap(flat_hash_set& other)
-  //
-  // Exchanges the contents of this `flat_hash_set` with those of the `other`
-  // flat hash map, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
-  //
-  // All iterators and references on the `flat_hash_set` remain valid, excepting
-  // for the past-the-end iterator, which is invalidated.
-  //
-  // `swap()` requires that the flat hash set's hashing and key equivalence
-  // functions be Swappable, and are exchaged using unqualified calls to
-  // non-member `swap()`. If the map's allocator has
-  // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value`
-  // set to `true`, the allocators are also exchanged using an unqualified call
-  // to non-member `swap()`; otherwise, the allocators are not swapped.
-  using Base::swap;
-
-  // flat_hash_set::rehash(count)
-  //
-  // Rehashes the `flat_hash_set`, setting the number of slots to be at least
-  // the passed value. If the new number of slots increases the load factor more
-  // than the current maximum load factor
-  // (`count` < `size()` / `max_load_factor()`), then the new number of slots
-  // will be at least `size()` / `max_load_factor()`.
-  //
-  // To force a rehash, pass rehash(0).
-  //
-  // NOTE: unlike behavior in `std::unordered_set`, references are also
-  // invalidated upon a `rehash()`.
-  using Base::rehash;
-
-  // flat_hash_set::reserve(count)
-  //
-  // Sets the number of slots in the `flat_hash_set` to the number needed to
-  // accommodate at least `count` total elements without exceeding the current
-  // maximum load factor, and may rehash the container if needed.
-  using Base::reserve;
-
-  // flat_hash_set::contains()
-  //
-  // Determines whether an element comparing equal to the given `key` exists
-  // within the `flat_hash_set`, returning `true` if so or `false` otherwise.
-  using Base::contains;
-
-  // flat_hash_set::count(const Key& key) const
-  //
-  // Returns the number of elements comparing equal to the given `key` within
-  // the `flat_hash_set`. note that this function will return either `1` or `0`
-  // since duplicate elements are not allowed within a `flat_hash_set`.
-  using Base::count;
-
-  // flat_hash_set::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `flat_hash_set`.
-  using Base::equal_range;
-
-  // flat_hash_set::find()
-  //
-  // Finds an element with the passed `key` within the `flat_hash_set`.
-  using Base::find;
-
-  // flat_hash_set::bucket_count()
-  //
-  // Returns the number of "buckets" within the `flat_hash_set`. Note that
-  // because a flat hash map contains all elements within its internal storage,
-  // this value simply equals the current capacity of the `flat_hash_set`.
-  using Base::bucket_count;
-
-  // flat_hash_set::load_factor()
-  //
-  // Returns the current load factor of the `flat_hash_set` (the average number
-  // of slots occupied with a value within the hash map).
-  using Base::load_factor;
-
-  // flat_hash_set::max_load_factor()
-  //
-  // Manages the maximum load factor of the `flat_hash_set`. Overloads are
-  // listed below.
-  //
-  // float flat_hash_set::max_load_factor()
-  //
-  //   Returns the current maximum load factor of the `flat_hash_set`.
-  //
-  // void flat_hash_set::max_load_factor(float ml)
-  //
-  //   Sets the maximum load factor of the `flat_hash_set` to the passed value.
-  //
-  //   NOTE: This overload is provided only for API compatibility with the STL;
-  //   `flat_hash_set` will ignore any set load factor and manage its rehashing
-  //   internally as an implementation detail.
-  using Base::max_load_factor;
-
-  // flat_hash_set::get_allocator()
-  //
-  // Returns the allocator function associated with this `flat_hash_set`.
-  using Base::get_allocator;
-
-  // flat_hash_set::hash_function()
-  //
-  // Returns the hashing function used to hash the keys within this
-  // `flat_hash_set`.
-  using Base::hash_function;
-
-  // flat_hash_set::key_eq()
-  //
-  // Returns the function used for comparing keys equality.
-  using Base::key_eq;
-};
-
-// erase_if(flat_hash_set<>, Pred)
-//
-// Erases all elements that satisfy the predicate `pred` from the container `c`.
-template <typename T, typename H, typename E, typename A, typename Predicate>
-void erase_if(flat_hash_set<T, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
-}
-
-namespace container_internal {
-
-template <class T>
-struct FlatHashSetPolicy {
-  using slot_type = T;
-  using key_type = T;
-  using init_type = T;
-  using constant_iterators = std::true_type;
-
-  template <class Allocator, class... Args>
-  static void construct(Allocator* alloc, slot_type* slot, Args&&... args) {
-    absl::allocator_traits<Allocator>::construct(*alloc, slot,
-                                                 std::forward<Args>(args)...);
-  }
-
-  template <class Allocator>
-  static void destroy(Allocator* alloc, slot_type* slot) {
-    absl::allocator_traits<Allocator>::destroy(*alloc, slot);
-  }
-
-  template <class Allocator>
-  static void transfer(Allocator* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    construct(alloc, new_slot, std::move(*old_slot));
-    destroy(alloc, old_slot);
-  }
-
-  static T& element(slot_type* slot) { return *slot; }
-
-  template <class F, class... Args>
-  static decltype(absl::container_internal::DecomposeValue(
-      std::declval<F>(), std::declval<Args>()...))
-  apply(F&& f, Args&&... args) {
-    return absl::container_internal::DecomposeValue(
-        std::forward<F>(f), std::forward<Args>(args)...);
-  }
-
-  static size_t space_used(const T*) { return 0; }
-};
-}  // namespace container_internal
-
-namespace container_algorithm_internal {
-
-// Specialization of trait in absl/algorithm/container.h
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct IsUnorderedContainer<absl::flat_hash_set<Key, Hash, KeyEqual, Allocator>>
-    : std::true_type {};
-
-}  // namespace container_algorithm_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_FLAT_HASH_SET_H_
diff --git a/third_party/abseil/absl/container/flat_hash_set_test.cc b/third_party/abseil/absl/container/flat_hash_set_test.cc
deleted file mode 100644
index 8f6f994..0000000
--- a/third_party/abseil/absl/container/flat_hash_set_test.cc
+++ /dev/null
@@ -1,178 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/flat_hash_set.h"
-
-#include <vector>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/unordered_set_constructor_test.h"
-#include "absl/container/internal/unordered_set_lookup_test.h"
-#include "absl/container/internal/unordered_set_members_test.h"
-#include "absl/container/internal/unordered_set_modifiers_test.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::absl::container_internal::hash_internal::Enum;
-using ::absl::container_internal::hash_internal::EnumClass;
-using ::testing::IsEmpty;
-using ::testing::Pointee;
-using ::testing::UnorderedElementsAre;
-using ::testing::UnorderedElementsAreArray;
-
-// Check that absl::flat_hash_set works in a global constructor.
-struct BeforeMain {
-  BeforeMain() {
-    absl::flat_hash_set<int> x;
-    x.insert(1);
-    ABSL_RAW_CHECK(!x.contains(0), "x should not contain 0");
-    ABSL_RAW_CHECK(x.contains(1), "x should contain 1");
-  }
-};
-const BeforeMain before_main;
-
-template <class T>
-using Set =
-    absl::flat_hash_set<T, StatefulTestingHash, StatefulTestingEqual, Alloc<T>>;
-
-using SetTypes =
-    ::testing::Types<Set<int>, Set<std::string>, Set<Enum>, Set<EnumClass>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashSet, ConstructorTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashSet, LookupTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashSet, MembersTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(FlatHashSet, ModifiersTest, SetTypes);
-
-TEST(FlatHashSet, EmplaceString) {
-  std::vector<std::string> v = {"a", "b"};
-  absl::flat_hash_set<absl::string_view> hs(v.begin(), v.end());
-  EXPECT_THAT(hs, UnorderedElementsAreArray(v));
-}
-
-TEST(FlatHashSet, BitfieldArgument) {
-  union {
-    int n : 1;
-  };
-  n = 0;
-  absl::flat_hash_set<int> s = {n};
-  s.insert(n);
-  s.insert(s.end(), n);
-  s.insert({n});
-  s.erase(n);
-  s.count(n);
-  s.prefetch(n);
-  s.find(n);
-  s.contains(n);
-  s.equal_range(n);
-}
-
-TEST(FlatHashSet, MergeExtractInsert) {
-  struct Hash {
-    size_t operator()(const std::unique_ptr<int>& p) const { return *p; }
-  };
-  struct Eq {
-    bool operator()(const std::unique_ptr<int>& a,
-                    const std::unique_ptr<int>& b) const {
-      return *a == *b;
-    }
-  };
-  absl::flat_hash_set<std::unique_ptr<int>, Hash, Eq> set1, set2;
-  set1.insert(absl::make_unique<int>(7));
-  set1.insert(absl::make_unique<int>(17));
-
-  set2.insert(absl::make_unique<int>(7));
-  set2.insert(absl::make_unique<int>(19));
-
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(7), Pointee(17)));
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7), Pointee(19)));
-
-  set1.merge(set2);
-
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(7), Pointee(17), Pointee(19)));
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7)));
-
-  auto node = set1.extract(absl::make_unique<int>(7));
-  EXPECT_TRUE(node);
-  EXPECT_THAT(node.value(), Pointee(7));
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(17), Pointee(19)));
-
-  auto insert_result = set2.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_FALSE(insert_result.inserted);
-  EXPECT_TRUE(insert_result.node);
-  EXPECT_THAT(insert_result.node.value(), Pointee(7));
-  EXPECT_EQ(**insert_result.position, 7);
-  EXPECT_NE(insert_result.position->get(), insert_result.node.value().get());
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7)));
-
-  node = set1.extract(absl::make_unique<int>(17));
-  EXPECT_TRUE(node);
-  EXPECT_THAT(node.value(), Pointee(17));
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(19)));
-
-  node.value() = absl::make_unique<int>(23);
-
-  insert_result = set2.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_TRUE(insert_result.inserted);
-  EXPECT_FALSE(insert_result.node);
-  EXPECT_EQ(**insert_result.position, 23);
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7), Pointee(23)));
-}
-
-bool IsEven(int k) { return k % 2 == 0; }
-
-TEST(FlatHashSet, EraseIf) {
-  // Erase all elements.
-  {
-    flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return true; });
-    EXPECT_THAT(s, IsEmpty());
-  }
-  // Erase no elements.
-  {
-    flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return false; });
-    EXPECT_THAT(s, UnorderedElementsAre(1, 2, 3, 4, 5));
-  }
-  // Erase specific elements.
-  {
-    flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int k) { return k % 2 == 1; });
-    EXPECT_THAT(s, UnorderedElementsAre(2, 4));
-  }
-  // Predicate is function reference.
-  {
-    flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, IsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
-  }
-  // Predicate is function pointer.
-  {
-    flat_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, &IsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
-  }
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/inlined_vector.h b/third_party/abseil/absl/container/inlined_vector.h
deleted file mode 100644
index 90bb96e..0000000
--- a/third_party/abseil/absl/container/inlined_vector.h
+++ /dev/null
@@ -1,845 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: inlined_vector.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains the declaration and definition of an "inlined
-// vector" which behaves in an equivalent fashion to a `std::vector`, except
-// that storage for small sequences of the vector are provided inline without
-// requiring any heap allocation.
-//
-// An `absl::InlinedVector<T, N>` specifies the default capacity `N` as one of
-// its template parameters. Instances where `size() <= N` hold contained
-// elements in inline space. Typically `N` is very small so that sequences that
-// are expected to be short do not require allocations.
-//
-// An `absl::InlinedVector` does not usually require a specific allocator. If
-// the inlined vector grows beyond its initial constraints, it will need to
-// allocate (as any normal `std::vector` would). This is usually performed with
-// the default allocator (defined as `std::allocator<T>`). Optionally, a custom
-// allocator type may be specified as `A` in `absl::InlinedVector<T, N, A>`.
-
-#ifndef ABSL_CONTAINER_INLINED_VECTOR_H_
-#define ABSL_CONTAINER_INLINED_VECTOR_H_
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <cstdlib>
-#include <cstring>
-#include <initializer_list>
-#include <iterator>
-#include <memory>
-#include <type_traits>
-#include <utility>
-
-#include "absl/algorithm/algorithm.h"
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-#include "absl/container/internal/inlined_vector.h"
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-// -----------------------------------------------------------------------------
-// InlinedVector
-// -----------------------------------------------------------------------------
-//
-// An `absl::InlinedVector` is designed to be a drop-in replacement for
-// `std::vector` for use cases where the vector's size is sufficiently small
-// that it can be inlined. If the inlined vector does grow beyond its estimated
-// capacity, it will trigger an initial allocation on the heap, and will behave
-// as a `std::vector`. The API of the `absl::InlinedVector` within this file is
-// designed to cover the same API footprint as covered by `std::vector`.
-template <typename T, size_t N, typename A = std::allocator<T>>
-class InlinedVector {
-  static_assert(N > 0, "`absl::InlinedVector` requires an inlined capacity.");
-
-  using Storage = inlined_vector_internal::Storage<T, N, A>;
-
-  using AllocatorTraits = typename Storage::AllocatorTraits;
-  using RValueReference = typename Storage::RValueReference;
-  using MoveIterator = typename Storage::MoveIterator;
-  using IsMemcpyOk = typename Storage::IsMemcpyOk;
-
-  template <typename Iterator>
-  using IteratorValueAdapter =
-      typename Storage::template IteratorValueAdapter<Iterator>;
-  using CopyValueAdapter = typename Storage::CopyValueAdapter;
-  using DefaultValueAdapter = typename Storage::DefaultValueAdapter;
-
-  template <typename Iterator>
-  using EnableIfAtLeastForwardIterator = absl::enable_if_t<
-      inlined_vector_internal::IsAtLeastForwardIterator<Iterator>::value>;
-  template <typename Iterator>
-  using DisableIfAtLeastForwardIterator = absl::enable_if_t<
-      !inlined_vector_internal::IsAtLeastForwardIterator<Iterator>::value>;
-
- public:
-  using allocator_type = typename Storage::allocator_type;
-  using value_type = typename Storage::value_type;
-  using pointer = typename Storage::pointer;
-  using const_pointer = typename Storage::const_pointer;
-  using size_type = typename Storage::size_type;
-  using difference_type = typename Storage::difference_type;
-  using reference = typename Storage::reference;
-  using const_reference = typename Storage::const_reference;
-  using iterator = typename Storage::iterator;
-  using const_iterator = typename Storage::const_iterator;
-  using reverse_iterator = typename Storage::reverse_iterator;
-  using const_reverse_iterator = typename Storage::const_reverse_iterator;
-
-  // ---------------------------------------------------------------------------
-  // InlinedVector Constructors and Destructor
-  // ---------------------------------------------------------------------------
-
-  // Creates an empty inlined vector with a value-initialized allocator.
-  InlinedVector() noexcept(noexcept(allocator_type())) : storage_() {}
-
-  // Creates an empty inlined vector with a copy of `alloc`.
-  explicit InlinedVector(const allocator_type& alloc) noexcept
-      : storage_(alloc) {}
-
-  // Creates an inlined vector with `n` copies of `value_type()`.
-  explicit InlinedVector(size_type n,
-                         const allocator_type& alloc = allocator_type())
-      : storage_(alloc) {
-    storage_.Initialize(DefaultValueAdapter(), n);
-  }
-
-  // Creates an inlined vector with `n` copies of `v`.
-  InlinedVector(size_type n, const_reference v,
-                const allocator_type& alloc = allocator_type())
-      : storage_(alloc) {
-    storage_.Initialize(CopyValueAdapter(v), n);
-  }
-
-  // Creates an inlined vector with copies of the elements of `list`.
-  InlinedVector(std::initializer_list<value_type> list,
-                const allocator_type& alloc = allocator_type())
-      : InlinedVector(list.begin(), list.end(), alloc) {}
-
-  // Creates an inlined vector with elements constructed from the provided
-  // forward iterator range [`first`, `last`).
-  //
-  // NOTE: the `enable_if` prevents ambiguous interpretation between a call to
-  // this constructor with two integral arguments and a call to the above
-  // `InlinedVector(size_type, const_reference)` constructor.
-  template <typename ForwardIterator,
-            EnableIfAtLeastForwardIterator<ForwardIterator>* = nullptr>
-  InlinedVector(ForwardIterator first, ForwardIterator last,
-                const allocator_type& alloc = allocator_type())
-      : storage_(alloc) {
-    storage_.Initialize(IteratorValueAdapter<ForwardIterator>(first),
-                        std::distance(first, last));
-  }
-
-  // Creates an inlined vector with elements constructed from the provided input
-  // iterator range [`first`, `last`).
-  template <typename InputIterator,
-            DisableIfAtLeastForwardIterator<InputIterator>* = nullptr>
-  InlinedVector(InputIterator first, InputIterator last,
-                const allocator_type& alloc = allocator_type())
-      : storage_(alloc) {
-    std::copy(first, last, std::back_inserter(*this));
-  }
-
-  // Creates an inlined vector by copying the contents of `other` using
-  // `other`'s allocator.
-  InlinedVector(const InlinedVector& other)
-      : InlinedVector(other, *other.storage_.GetAllocPtr()) {}
-
-  // Creates an inlined vector by copying the contents of `other` using `alloc`.
-  InlinedVector(const InlinedVector& other, const allocator_type& alloc)
-      : storage_(alloc) {
-    if (IsMemcpyOk::value && !other.storage_.GetIsAllocated()) {
-      storage_.MemcpyFrom(other.storage_);
-    } else {
-      storage_.Initialize(IteratorValueAdapter<const_pointer>(other.data()),
-                          other.size());
-    }
-  }
-
-  // Creates an inlined vector by moving in the contents of `other` without
-  // allocating. If `other` contains allocated memory, the newly-created inlined
-  // vector will take ownership of that memory. However, if `other` does not
-  // contain allocated memory, the newly-created inlined vector will perform
-  // element-wise move construction of the contents of `other`.
-  //
-  // NOTE: since no allocation is performed for the inlined vector in either
-  // case, the `noexcept(...)` specification depends on whether moving the
-  // underlying objects can throw. It is assumed assumed that...
-  //  a) move constructors should only throw due to allocation failure.
-  //  b) if `value_type`'s move constructor allocates, it uses the same
-  //     allocation function as the inlined vector's allocator.
-  // Thus, the move constructor is non-throwing if the allocator is non-throwing
-  // or `value_type`'s move constructor is specified as `noexcept`.
-  InlinedVector(InlinedVector&& other) noexcept(
-      absl::allocator_is_nothrow<allocator_type>::value ||
-      std::is_nothrow_move_constructible<value_type>::value)
-      : storage_(*other.storage_.GetAllocPtr()) {
-    if (IsMemcpyOk::value) {
-      storage_.MemcpyFrom(other.storage_);
-
-      other.storage_.SetInlinedSize(0);
-    } else if (other.storage_.GetIsAllocated()) {
-      storage_.SetAllocatedData(other.storage_.GetAllocatedData(),
-                                other.storage_.GetAllocatedCapacity());
-      storage_.SetAllocatedSize(other.storage_.GetSize());
-
-      other.storage_.SetInlinedSize(0);
-    } else {
-      IteratorValueAdapter<MoveIterator> other_values(
-          MoveIterator(other.storage_.GetInlinedData()));
-
-      inlined_vector_internal::ConstructElements(
-          storage_.GetAllocPtr(), storage_.GetInlinedData(), &other_values,
-          other.storage_.GetSize());
-
-      storage_.SetInlinedSize(other.storage_.GetSize());
-    }
-  }
-
-  // Creates an inlined vector by moving in the contents of `other` with a copy
-  // of `alloc`.
-  //
-  // NOTE: if `other`'s allocator is not equal to `alloc`, even if `other`
-  // contains allocated memory, this move constructor will still allocate. Since
-  // allocation is performed, this constructor can only be `noexcept` if the
-  // specified allocator is also `noexcept`.
-  InlinedVector(InlinedVector&& other, const allocator_type& alloc) noexcept(
-      absl::allocator_is_nothrow<allocator_type>::value)
-      : storage_(alloc) {
-    if (IsMemcpyOk::value) {
-      storage_.MemcpyFrom(other.storage_);
-
-      other.storage_.SetInlinedSize(0);
-    } else if ((*storage_.GetAllocPtr() == *other.storage_.GetAllocPtr()) &&
-               other.storage_.GetIsAllocated()) {
-      storage_.SetAllocatedData(other.storage_.GetAllocatedData(),
-                                other.storage_.GetAllocatedCapacity());
-      storage_.SetAllocatedSize(other.storage_.GetSize());
-
-      other.storage_.SetInlinedSize(0);
-    } else {
-      storage_.Initialize(
-          IteratorValueAdapter<MoveIterator>(MoveIterator(other.data())),
-          other.size());
-    }
-  }
-
-  ~InlinedVector() {}
-
-  // ---------------------------------------------------------------------------
-  // InlinedVector Member Accessors
-  // ---------------------------------------------------------------------------
-
-  // `InlinedVector::empty()`
-  //
-  // Returns whether the inlined vector contains no elements.
-  bool empty() const noexcept { return !size(); }
-
-  // `InlinedVector::size()`
-  //
-  // Returns the number of elements in the inlined vector.
-  size_type size() const noexcept { return storage_.GetSize(); }
-
-  // `InlinedVector::max_size()`
-  //
-  // Returns the maximum number of elements the inlined vector can hold.
-  size_type max_size() const noexcept {
-    // One bit of the size storage is used to indicate whether the inlined
-    // vector contains allocated memory. As a result, the maximum size that the
-    // inlined vector can express is half of the max for `size_type`.
-    return (std::numeric_limits<size_type>::max)() / 2;
-  }
-
-  // `InlinedVector::capacity()`
-  //
-  // Returns the number of elements that could be stored in the inlined vector
-  // without requiring a reallocation.
-  //
-  // NOTE: for most inlined vectors, `capacity()` should be equal to the
-  // template parameter `N`. For inlined vectors which exceed this capacity,
-  // they will no longer be inlined and `capacity()` will equal the capactity of
-  // the allocated memory.
-  size_type capacity() const noexcept {
-    return storage_.GetIsAllocated() ? storage_.GetAllocatedCapacity()
-                                     : storage_.GetInlinedCapacity();
-  }
-
-  // `InlinedVector::data()`
-  //
-  // Returns a `pointer` to the elements of the inlined vector. This pointer
-  // can be used to access and modify the contained elements.
-  //
-  // NOTE: only elements within [`data()`, `data() + size()`) are valid.
-  pointer data() noexcept {
-    return storage_.GetIsAllocated() ? storage_.GetAllocatedData()
-                                     : storage_.GetInlinedData();
-  }
-
-  // Overload of `InlinedVector::data()` that returns a `const_pointer` to the
-  // elements of the inlined vector. This pointer can be used to access but not
-  // modify the contained elements.
-  //
-  // NOTE: only elements within [`data()`, `data() + size()`) are valid.
-  const_pointer data() const noexcept {
-    return storage_.GetIsAllocated() ? storage_.GetAllocatedData()
-                                     : storage_.GetInlinedData();
-  }
-
-  // `InlinedVector::operator[](...)`
-  //
-  // Returns a `reference` to the `i`th element of the inlined vector.
-  reference operator[](size_type i) {
-    ABSL_HARDENING_ASSERT(i < size());
-    return data()[i];
-  }
-
-  // Overload of `InlinedVector::operator[](...)` that returns a
-  // `const_reference` to the `i`th element of the inlined vector.
-  const_reference operator[](size_type i) const {
-    ABSL_HARDENING_ASSERT(i < size());
-    return data()[i];
-  }
-
-  // `InlinedVector::at(...)`
-  //
-  // Returns a `reference` to the `i`th element of the inlined vector.
-  //
-  // NOTE: if `i` is not within the required range of `InlinedVector::at(...)`,
-  // in both debug and non-debug builds, `std::out_of_range` will be thrown.
-  reference at(size_type i) {
-    if (ABSL_PREDICT_FALSE(i >= size())) {
-      base_internal::ThrowStdOutOfRange(
-          "`InlinedVector::at(size_type)` failed bounds check");
-    }
-    return data()[i];
-  }
-
-  // Overload of `InlinedVector::at(...)` that returns a `const_reference` to
-  // the `i`th element of the inlined vector.
-  //
-  // NOTE: if `i` is not within the required range of `InlinedVector::at(...)`,
-  // in both debug and non-debug builds, `std::out_of_range` will be thrown.
-  const_reference at(size_type i) const {
-    if (ABSL_PREDICT_FALSE(i >= size())) {
-      base_internal::ThrowStdOutOfRange(
-          "`InlinedVector::at(size_type) const` failed bounds check");
-    }
-    return data()[i];
-  }
-
-  // `InlinedVector::front()`
-  //
-  // Returns a `reference` to the first element of the inlined vector.
-  reference front() {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[0];
-  }
-
-  // Overload of `InlinedVector::front()` that returns a `const_reference` to
-  // the first element of the inlined vector.
-  const_reference front() const {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[0];
-  }
-
-  // `InlinedVector::back()`
-  //
-  // Returns a `reference` to the last element of the inlined vector.
-  reference back() {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[size() - 1];
-  }
-
-  // Overload of `InlinedVector::back()` that returns a `const_reference` to the
-  // last element of the inlined vector.
-  const_reference back() const {
-    ABSL_HARDENING_ASSERT(!empty());
-    return data()[size() - 1];
-  }
-
-  // `InlinedVector::begin()`
-  //
-  // Returns an `iterator` to the beginning of the inlined vector.
-  iterator begin() noexcept { return data(); }
-
-  // Overload of `InlinedVector::begin()` that returns a `const_iterator` to
-  // the beginning of the inlined vector.
-  const_iterator begin() const noexcept { return data(); }
-
-  // `InlinedVector::end()`
-  //
-  // Returns an `iterator` to the end of the inlined vector.
-  iterator end() noexcept { return data() + size(); }
-
-  // Overload of `InlinedVector::end()` that returns a `const_iterator` to the
-  // end of the inlined vector.
-  const_iterator end() const noexcept { return data() + size(); }
-
-  // `InlinedVector::cbegin()`
-  //
-  // Returns a `const_iterator` to the beginning of the inlined vector.
-  const_iterator cbegin() const noexcept { return begin(); }
-
-  // `InlinedVector::cend()`
-  //
-  // Returns a `const_iterator` to the end of the inlined vector.
-  const_iterator cend() const noexcept { return end(); }
-
-  // `InlinedVector::rbegin()`
-  //
-  // Returns a `reverse_iterator` from the end of the inlined vector.
-  reverse_iterator rbegin() noexcept { return reverse_iterator(end()); }
-
-  // Overload of `InlinedVector::rbegin()` that returns a
-  // `const_reverse_iterator` from the end of the inlined vector.
-  const_reverse_iterator rbegin() const noexcept {
-    return const_reverse_iterator(end());
-  }
-
-  // `InlinedVector::rend()`
-  //
-  // Returns a `reverse_iterator` from the beginning of the inlined vector.
-  reverse_iterator rend() noexcept { return reverse_iterator(begin()); }
-
-  // Overload of `InlinedVector::rend()` that returns a `const_reverse_iterator`
-  // from the beginning of the inlined vector.
-  const_reverse_iterator rend() const noexcept {
-    return const_reverse_iterator(begin());
-  }
-
-  // `InlinedVector::crbegin()`
-  //
-  // Returns a `const_reverse_iterator` from the end of the inlined vector.
-  const_reverse_iterator crbegin() const noexcept { return rbegin(); }
-
-  // `InlinedVector::crend()`
-  //
-  // Returns a `const_reverse_iterator` from the beginning of the inlined
-  // vector.
-  const_reverse_iterator crend() const noexcept { return rend(); }
-
-  // `InlinedVector::get_allocator()`
-  //
-  // Returns a copy of the inlined vector's allocator.
-  allocator_type get_allocator() const { return *storage_.GetAllocPtr(); }
-
-  // ---------------------------------------------------------------------------
-  // InlinedVector Member Mutators
-  // ---------------------------------------------------------------------------
-
-  // `InlinedVector::operator=(...)`
-  //
-  // Replaces the elements of the inlined vector with copies of the elements of
-  // `list`.
-  InlinedVector& operator=(std::initializer_list<value_type> list) {
-    assign(list.begin(), list.end());
-
-    return *this;
-  }
-
-  // Overload of `InlinedVector::operator=(...)` that replaces the elements of
-  // the inlined vector with copies of the elements of `other`.
-  InlinedVector& operator=(const InlinedVector& other) {
-    if (ABSL_PREDICT_TRUE(this != std::addressof(other))) {
-      const_pointer other_data = other.data();
-      assign(other_data, other_data + other.size());
-    }
-
-    return *this;
-  }
-
-  // Overload of `InlinedVector::operator=(...)` that moves the elements of
-  // `other` into the inlined vector.
-  //
-  // NOTE: as a result of calling this overload, `other` is left in a valid but
-  // unspecified state.
-  InlinedVector& operator=(InlinedVector&& other) {
-    if (ABSL_PREDICT_TRUE(this != std::addressof(other))) {
-      if (IsMemcpyOk::value || other.storage_.GetIsAllocated()) {
-        inlined_vector_internal::DestroyElements(storage_.GetAllocPtr(), data(),
-                                                 size());
-        storage_.DeallocateIfAllocated();
-        storage_.MemcpyFrom(other.storage_);
-
-        other.storage_.SetInlinedSize(0);
-      } else {
-        storage_.Assign(IteratorValueAdapter<MoveIterator>(
-                            MoveIterator(other.storage_.GetInlinedData())),
-                        other.size());
-      }
-    }
-
-    return *this;
-  }
-
-  // `InlinedVector::assign(...)`
-  //
-  // Replaces the contents of the inlined vector with `n` copies of `v`.
-  void assign(size_type n, const_reference v) {
-    storage_.Assign(CopyValueAdapter(v), n);
-  }
-
-  // Overload of `InlinedVector::assign(...)` that replaces the contents of the
-  // inlined vector with copies of the elements of `list`.
-  void assign(std::initializer_list<value_type> list) {
-    assign(list.begin(), list.end());
-  }
-
-  // Overload of `InlinedVector::assign(...)` to replace the contents of the
-  // inlined vector with the range [`first`, `last`).
-  //
-  // NOTE: this overload is for iterators that are "forward" category or better.
-  template <typename ForwardIterator,
-            EnableIfAtLeastForwardIterator<ForwardIterator>* = nullptr>
-  void assign(ForwardIterator first, ForwardIterator last) {
-    storage_.Assign(IteratorValueAdapter<ForwardIterator>(first),
-                    std::distance(first, last));
-  }
-
-  // Overload of `InlinedVector::assign(...)` to replace the contents of the
-  // inlined vector with the range [`first`, `last`).
-  //
-  // NOTE: this overload is for iterators that are "input" category.
-  template <typename InputIterator,
-            DisableIfAtLeastForwardIterator<InputIterator>* = nullptr>
-  void assign(InputIterator first, InputIterator last) {
-    size_type i = 0;
-    for (; i < size() && first != last; ++i, static_cast<void>(++first)) {
-      data()[i] = *first;
-    }
-
-    erase(data() + i, data() + size());
-    std::copy(first, last, std::back_inserter(*this));
-  }
-
-  // `InlinedVector::resize(...)`
-  //
-  // Resizes the inlined vector to contain `n` elements.
-  //
-  // NOTE: If `n` is smaller than `size()`, extra elements are destroyed. If `n`
-  // is larger than `size()`, new elements are value-initialized.
-  void resize(size_type n) {
-    ABSL_HARDENING_ASSERT(n <= max_size());
-    storage_.Resize(DefaultValueAdapter(), n);
-  }
-
-  // Overload of `InlinedVector::resize(...)` that resizes the inlined vector to
-  // contain `n` elements.
-  //
-  // NOTE: if `n` is smaller than `size()`, extra elements are destroyed. If `n`
-  // is larger than `size()`, new elements are copied-constructed from `v`.
-  void resize(size_type n, const_reference v) {
-    ABSL_HARDENING_ASSERT(n <= max_size());
-    storage_.Resize(CopyValueAdapter(v), n);
-  }
-
-  // `InlinedVector::insert(...)`
-  //
-  // Inserts a copy of `v` at `pos`, returning an `iterator` to the newly
-  // inserted element.
-  iterator insert(const_iterator pos, const_reference v) {
-    return emplace(pos, v);
-  }
-
-  // Overload of `InlinedVector::insert(...)` that inserts `v` at `pos` using
-  // move semantics, returning an `iterator` to the newly inserted element.
-  iterator insert(const_iterator pos, RValueReference v) {
-    return emplace(pos, std::move(v));
-  }
-
-  // Overload of `InlinedVector::insert(...)` that inserts `n` contiguous copies
-  // of `v` starting at `pos`, returning an `iterator` pointing to the first of
-  // the newly inserted elements.
-  iterator insert(const_iterator pos, size_type n, const_reference v) {
-    ABSL_HARDENING_ASSERT(pos >= begin());
-    ABSL_HARDENING_ASSERT(pos <= end());
-
-    if (ABSL_PREDICT_TRUE(n != 0)) {
-      value_type dealias = v;
-      return storage_.Insert(pos, CopyValueAdapter(dealias), n);
-    } else {
-      return const_cast<iterator>(pos);
-    }
-  }
-
-  // Overload of `InlinedVector::insert(...)` that inserts copies of the
-  // elements of `list` starting at `pos`, returning an `iterator` pointing to
-  // the first of the newly inserted elements.
-  iterator insert(const_iterator pos, std::initializer_list<value_type> list) {
-    return insert(pos, list.begin(), list.end());
-  }
-
-  // Overload of `InlinedVector::insert(...)` that inserts the range [`first`,
-  // `last`) starting at `pos`, returning an `iterator` pointing to the first
-  // of the newly inserted elements.
-  //
-  // NOTE: this overload is for iterators that are "forward" category or better.
-  template <typename ForwardIterator,
-            EnableIfAtLeastForwardIterator<ForwardIterator>* = nullptr>
-  iterator insert(const_iterator pos, ForwardIterator first,
-                  ForwardIterator last) {
-    ABSL_HARDENING_ASSERT(pos >= begin());
-    ABSL_HARDENING_ASSERT(pos <= end());
-
-    if (ABSL_PREDICT_TRUE(first != last)) {
-      return storage_.Insert(pos, IteratorValueAdapter<ForwardIterator>(first),
-                             std::distance(first, last));
-    } else {
-      return const_cast<iterator>(pos);
-    }
-  }
-
-  // Overload of `InlinedVector::insert(...)` that inserts the range [`first`,
-  // `last`) starting at `pos`, returning an `iterator` pointing to the first
-  // of the newly inserted elements.
-  //
-  // NOTE: this overload is for iterators that are "input" category.
-  template <typename InputIterator,
-            DisableIfAtLeastForwardIterator<InputIterator>* = nullptr>
-  iterator insert(const_iterator pos, InputIterator first, InputIterator last) {
-    ABSL_HARDENING_ASSERT(pos >= begin());
-    ABSL_HARDENING_ASSERT(pos <= end());
-
-    size_type index = std::distance(cbegin(), pos);
-    for (size_type i = index; first != last; ++i, static_cast<void>(++first)) {
-      insert(data() + i, *first);
-    }
-
-    return iterator(data() + index);
-  }
-
-  // `InlinedVector::emplace(...)`
-  //
-  // Constructs and inserts an element using `args...` in the inlined vector at
-  // `pos`, returning an `iterator` pointing to the newly emplaced element.
-  template <typename... Args>
-  iterator emplace(const_iterator pos, Args&&... args) {
-    ABSL_HARDENING_ASSERT(pos >= begin());
-    ABSL_HARDENING_ASSERT(pos <= end());
-
-    value_type dealias(std::forward<Args>(args)...);
-    return storage_.Insert(pos,
-                           IteratorValueAdapter<MoveIterator>(
-                               MoveIterator(std::addressof(dealias))),
-                           1);
-  }
-
-  // `InlinedVector::emplace_back(...)`
-  //
-  // Constructs and inserts an element using `args...` in the inlined vector at
-  // `end()`, returning a `reference` to the newly emplaced element.
-  template <typename... Args>
-  reference emplace_back(Args&&... args) {
-    return storage_.EmplaceBack(std::forward<Args>(args)...);
-  }
-
-  // `InlinedVector::push_back(...)`
-  //
-  // Inserts a copy of `v` in the inlined vector at `end()`.
-  void push_back(const_reference v) { static_cast<void>(emplace_back(v)); }
-
-  // Overload of `InlinedVector::push_back(...)` for inserting `v` at `end()`
-  // using move semantics.
-  void push_back(RValueReference v) {
-    static_cast<void>(emplace_back(std::move(v)));
-  }
-
-  // `InlinedVector::pop_back()`
-  //
-  // Destroys the element at `back()`, reducing the size by `1`.
-  void pop_back() noexcept {
-    ABSL_HARDENING_ASSERT(!empty());
-
-    AllocatorTraits::destroy(*storage_.GetAllocPtr(), data() + (size() - 1));
-    storage_.SubtractSize(1);
-  }
-
-  // `InlinedVector::erase(...)`
-  //
-  // Erases the element at `pos`, returning an `iterator` pointing to where the
-  // erased element was located.
-  //
-  // NOTE: may return `end()`, which is not dereferencable.
-  iterator erase(const_iterator pos) {
-    ABSL_HARDENING_ASSERT(pos >= begin());
-    ABSL_HARDENING_ASSERT(pos < end());
-
-    return storage_.Erase(pos, pos + 1);
-  }
-
-  // Overload of `InlinedVector::erase(...)` that erases every element in the
-  // range [`from`, `to`), returning an `iterator` pointing to where the first
-  // erased element was located.
-  //
-  // NOTE: may return `end()`, which is not dereferencable.
-  iterator erase(const_iterator from, const_iterator to) {
-    ABSL_HARDENING_ASSERT(from >= begin());
-    ABSL_HARDENING_ASSERT(from <= to);
-    ABSL_HARDENING_ASSERT(to <= end());
-
-    if (ABSL_PREDICT_TRUE(from != to)) {
-      return storage_.Erase(from, to);
-    } else {
-      return const_cast<iterator>(from);
-    }
-  }
-
-  // `InlinedVector::clear()`
-  //
-  // Destroys all elements in the inlined vector, setting the size to `0` and
-  // deallocating any held memory.
-  void clear() noexcept {
-    inlined_vector_internal::DestroyElements(storage_.GetAllocPtr(), data(),
-                                             size());
-    storage_.DeallocateIfAllocated();
-
-    storage_.SetInlinedSize(0);
-  }
-
-  // `InlinedVector::reserve(...)`
-  //
-  // Ensures that there is enough room for at least `n` elements.
-  void reserve(size_type n) { storage_.Reserve(n); }
-
-  // `InlinedVector::shrink_to_fit()`
-  //
-  // Reduces memory usage by freeing unused memory. After being called, calls to
-  // `capacity()` will be equal to `max(N, size())`.
-  //
-  // If `size() <= N` and the inlined vector contains allocated memory, the
-  // elements will all be moved to the inlined space and the allocated memory
-  // will be deallocated.
-  //
-  // If `size() > N` and `size() < capacity()`, the elements will be moved to a
-  // smaller allocation.
-  void shrink_to_fit() {
-    if (storage_.GetIsAllocated()) {
-      storage_.ShrinkToFit();
-    }
-  }
-
-  // `InlinedVector::swap(...)`
-  //
-  // Swaps the contents of the inlined vector with `other`.
-  void swap(InlinedVector& other) {
-    if (ABSL_PREDICT_TRUE(this != std::addressof(other))) {
-      storage_.Swap(std::addressof(other.storage_));
-    }
-  }
-
- private:
-  template <typename H, typename TheT, size_t TheN, typename TheA>
-  friend H AbslHashValue(H h, const absl::InlinedVector<TheT, TheN, TheA>& a);
-
-  Storage storage_;
-};
-
-// -----------------------------------------------------------------------------
-// InlinedVector Non-Member Functions
-// -----------------------------------------------------------------------------
-
-// `swap(...)`
-//
-// Swaps the contents of two inlined vectors.
-template <typename T, size_t N, typename A>
-void swap(absl::InlinedVector<T, N, A>& a,
-          absl::InlinedVector<T, N, A>& b) noexcept(noexcept(a.swap(b))) {
-  a.swap(b);
-}
-
-// `operator==(...)`
-//
-// Tests for value-equality of two inlined vectors.
-template <typename T, size_t N, typename A>
-bool operator==(const absl::InlinedVector<T, N, A>& a,
-                const absl::InlinedVector<T, N, A>& b) {
-  auto a_data = a.data();
-  auto b_data = b.data();
-  return absl::equal(a_data, a_data + a.size(), b_data, b_data + b.size());
-}
-
-// `operator!=(...)`
-//
-// Tests for value-inequality of two inlined vectors.
-template <typename T, size_t N, typename A>
-bool operator!=(const absl::InlinedVector<T, N, A>& a,
-                const absl::InlinedVector<T, N, A>& b) {
-  return !(a == b);
-}
-
-// `operator<(...)`
-//
-// Tests whether the value of an inlined vector is less than the value of
-// another inlined vector using a lexicographical comparison algorithm.
-template <typename T, size_t N, typename A>
-bool operator<(const absl::InlinedVector<T, N, A>& a,
-               const absl::InlinedVector<T, N, A>& b) {
-  auto a_data = a.data();
-  auto b_data = b.data();
-  return std::lexicographical_compare(a_data, a_data + a.size(), b_data,
-                                      b_data + b.size());
-}
-
-// `operator>(...)`
-//
-// Tests whether the value of an inlined vector is greater than the value of
-// another inlined vector using a lexicographical comparison algorithm.
-template <typename T, size_t N, typename A>
-bool operator>(const absl::InlinedVector<T, N, A>& a,
-               const absl::InlinedVector<T, N, A>& b) {
-  return b < a;
-}
-
-// `operator<=(...)`
-//
-// Tests whether the value of an inlined vector is less than or equal to the
-// value of another inlined vector using a lexicographical comparison algorithm.
-template <typename T, size_t N, typename A>
-bool operator<=(const absl::InlinedVector<T, N, A>& a,
-                const absl::InlinedVector<T, N, A>& b) {
-  return !(b < a);
-}
-
-// `operator>=(...)`
-//
-// Tests whether the value of an inlined vector is greater than or equal to the
-// value of another inlined vector using a lexicographical comparison algorithm.
-template <typename T, size_t N, typename A>
-bool operator>=(const absl::InlinedVector<T, N, A>& a,
-                const absl::InlinedVector<T, N, A>& b) {
-  return !(a < b);
-}
-
-// `AbslHashValue(...)`
-//
-// Provides `absl::Hash` support for `absl::InlinedVector`. It is uncommon to
-// call this directly.
-template <typename H, typename T, size_t N, typename A>
-H AbslHashValue(H h, const absl::InlinedVector<T, N, A>& a) {
-  auto size = a.size();
-  return H::combine(H::combine_contiguous(std::move(h), a.data(), size), size);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INLINED_VECTOR_H_
diff --git a/third_party/abseil/absl/container/inlined_vector_benchmark.cc b/third_party/abseil/absl/container/inlined_vector_benchmark.cc
deleted file mode 100644
index b8dafe9..0000000
--- a/third_party/abseil/absl/container/inlined_vector_benchmark.cc
+++ /dev/null
@@ -1,807 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <array>
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/container/inlined_vector.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-void BM_InlinedVectorFill(benchmark::State& state) {
-  const int len = state.range(0);
-  absl::InlinedVector<int, 8> v;
-  v.reserve(len);
-  for (auto _ : state) {
-    v.resize(0);  // Use resize(0) as InlinedVector releases storage on clear().
-    for (int i = 0; i < len; ++i) {
-      v.push_back(i);
-    }
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_InlinedVectorFill)->Range(1, 256);
-
-void BM_InlinedVectorFillRange(benchmark::State& state) {
-  const int len = state.range(0);
-  const std::vector<int> src(len, len);
-  absl::InlinedVector<int, 8> v;
-  v.reserve(len);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(src);
-    v.assign(src.begin(), src.end());
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_InlinedVectorFillRange)->Range(1, 256);
-
-void BM_StdVectorFill(benchmark::State& state) {
-  const int len = state.range(0);
-  std::vector<int> v;
-  v.reserve(len);
-  for (auto _ : state) {
-    v.clear();
-    for (int i = 0; i < len; ++i) {
-      v.push_back(i);
-    }
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_StdVectorFill)->Range(1, 256);
-
-// The purpose of the next two benchmarks is to verify that
-// absl::InlinedVector is efficient when moving is more efficent than
-// copying. To do so, we use strings that are larger than the short
-// string optimization.
-bool StringRepresentedInline(std::string s) {
-  const char* chars = s.data();
-  std::string s1 = std::move(s);
-  return s1.data() != chars;
-}
-
-int GetNonShortStringOptimizationSize() {
-  for (int i = 24; i <= 192; i *= 2) {
-    if (!StringRepresentedInline(std::string(i, 'A'))) {
-      return i;
-    }
-  }
-  ABSL_RAW_LOG(
-      FATAL,
-      "Failed to find a string larger than the short string optimization");
-  return -1;
-}
-
-void BM_InlinedVectorFillString(benchmark::State& state) {
-  const int len = state.range(0);
-  const int no_sso = GetNonShortStringOptimizationSize();
-  std::string strings[4] = {std::string(no_sso, 'A'), std::string(no_sso, 'B'),
-                            std::string(no_sso, 'C'), std::string(no_sso, 'D')};
-
-  for (auto _ : state) {
-    absl::InlinedVector<std::string, 8> v;
-    for (int i = 0; i < len; i++) {
-      v.push_back(strings[i & 3]);
-    }
-  }
-  state.SetItemsProcessed(static_cast<int64_t>(state.iterations()) * len);
-}
-BENCHMARK(BM_InlinedVectorFillString)->Range(0, 1024);
-
-void BM_StdVectorFillString(benchmark::State& state) {
-  const int len = state.range(0);
-  const int no_sso = GetNonShortStringOptimizationSize();
-  std::string strings[4] = {std::string(no_sso, 'A'), std::string(no_sso, 'B'),
-                            std::string(no_sso, 'C'), std::string(no_sso, 'D')};
-
-  for (auto _ : state) {
-    std::vector<std::string> v;
-    for (int i = 0; i < len; i++) {
-      v.push_back(strings[i & 3]);
-    }
-  }
-  state.SetItemsProcessed(static_cast<int64_t>(state.iterations()) * len);
-}
-BENCHMARK(BM_StdVectorFillString)->Range(0, 1024);
-
-struct Buffer {  // some arbitrary structure for benchmarking.
-  char* base;
-  int length;
-  int capacity;
-  void* user_data;
-};
-
-void BM_InlinedVectorAssignments(benchmark::State& state) {
-  const int len = state.range(0);
-  using BufferVec = absl::InlinedVector<Buffer, 2>;
-
-  BufferVec src;
-  src.resize(len);
-
-  BufferVec dst;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(dst);
-    benchmark::DoNotOptimize(src);
-    dst = src;
-  }
-}
-BENCHMARK(BM_InlinedVectorAssignments)
-    ->Arg(0)
-    ->Arg(1)
-    ->Arg(2)
-    ->Arg(3)
-    ->Arg(4)
-    ->Arg(20);
-
-void BM_CreateFromContainer(benchmark::State& state) {
-  for (auto _ : state) {
-    absl::InlinedVector<int, 4> src{1, 2, 3};
-    benchmark::DoNotOptimize(src);
-    absl::InlinedVector<int, 4> dst(std::move(src));
-    benchmark::DoNotOptimize(dst);
-  }
-}
-BENCHMARK(BM_CreateFromContainer);
-
-struct LargeCopyableOnly {
-  LargeCopyableOnly() : d(1024, 17) {}
-  LargeCopyableOnly(const LargeCopyableOnly& o) = default;
-  LargeCopyableOnly& operator=(const LargeCopyableOnly& o) = default;
-
-  std::vector<int> d;
-};
-
-struct LargeCopyableSwappable {
-  LargeCopyableSwappable() : d(1024, 17) {}
-
-  LargeCopyableSwappable(const LargeCopyableSwappable& o) = default;
-
-  LargeCopyableSwappable& operator=(LargeCopyableSwappable o) {
-    using std::swap;
-    swap(*this, o);
-    return *this;
-  }
-
-  friend void swap(LargeCopyableSwappable& a, LargeCopyableSwappable& b) {
-    using std::swap;
-    swap(a.d, b.d);
-  }
-
-  std::vector<int> d;
-};
-
-struct LargeCopyableMovable {
-  LargeCopyableMovable() : d(1024, 17) {}
-  // Use implicitly defined copy and move.
-
-  std::vector<int> d;
-};
-
-struct LargeCopyableMovableSwappable {
-  LargeCopyableMovableSwappable() : d(1024, 17) {}
-  LargeCopyableMovableSwappable(const LargeCopyableMovableSwappable& o) =
-      default;
-  LargeCopyableMovableSwappable(LargeCopyableMovableSwappable&& o) = default;
-
-  LargeCopyableMovableSwappable& operator=(LargeCopyableMovableSwappable o) {
-    using std::swap;
-    swap(*this, o);
-    return *this;
-  }
-  LargeCopyableMovableSwappable& operator=(LargeCopyableMovableSwappable&& o) =
-      default;
-
-  friend void swap(LargeCopyableMovableSwappable& a,
-                   LargeCopyableMovableSwappable& b) {
-    using std::swap;
-    swap(a.d, b.d);
-  }
-
-  std::vector<int> d;
-};
-
-template <typename ElementType>
-void BM_SwapElements(benchmark::State& state) {
-  const int len = state.range(0);
-  using Vec = absl::InlinedVector<ElementType, 32>;
-  Vec a(len);
-  Vec b;
-  for (auto _ : state) {
-    using std::swap;
-    benchmark::DoNotOptimize(a);
-    benchmark::DoNotOptimize(b);
-    swap(a, b);
-  }
-}
-BENCHMARK_TEMPLATE(BM_SwapElements, LargeCopyableOnly)->Range(0, 1024);
-BENCHMARK_TEMPLATE(BM_SwapElements, LargeCopyableSwappable)->Range(0, 1024);
-BENCHMARK_TEMPLATE(BM_SwapElements, LargeCopyableMovable)->Range(0, 1024);
-BENCHMARK_TEMPLATE(BM_SwapElements, LargeCopyableMovableSwappable)
-    ->Range(0, 1024);
-
-// The following benchmark is meant to track the efficiency of the vector size
-// as a function of stored type via the benchmark label. It is not meant to
-// output useful sizeof operator performance. The loop is a dummy operation
-// to fulfill the requirement of running the benchmark.
-template <typename VecType>
-void BM_Sizeof(benchmark::State& state) {
-  int size = 0;
-  for (auto _ : state) {
-    VecType vec;
-    size = sizeof(vec);
-  }
-  state.SetLabel(absl::StrCat("sz=", size));
-}
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<char, 1>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<char, 4>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<char, 7>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<char, 8>);
-
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<int, 1>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<int, 4>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<int, 7>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<int, 8>);
-
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<void*, 1>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<void*, 4>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<void*, 7>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<void*, 8>);
-
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<std::string, 1>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<std::string, 4>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<std::string, 7>);
-BENCHMARK_TEMPLATE(BM_Sizeof, absl::InlinedVector<std::string, 8>);
-
-void BM_InlinedVectorIndexInlined(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v[4]);
-  }
-}
-BENCHMARK(BM_InlinedVectorIndexInlined);
-
-void BM_InlinedVectorIndexExternal(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v[4]);
-  }
-}
-BENCHMARK(BM_InlinedVectorIndexExternal);
-
-void BM_StdVectorIndex(benchmark::State& state) {
-  std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v[4]);
-  }
-}
-BENCHMARK(BM_StdVectorIndex);
-
-void BM_InlinedVectorDataInlined(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.data());
-  }
-}
-BENCHMARK(BM_InlinedVectorDataInlined);
-
-void BM_InlinedVectorDataExternal(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.data());
-  }
-  state.SetItemsProcessed(16 * static_cast<int64_t>(state.iterations()));
-}
-BENCHMARK(BM_InlinedVectorDataExternal);
-
-void BM_StdVectorData(benchmark::State& state) {
-  std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.data());
-  }
-  state.SetItemsProcessed(16 * static_cast<int64_t>(state.iterations()));
-}
-BENCHMARK(BM_StdVectorData);
-
-void BM_InlinedVectorSizeInlined(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.size());
-  }
-}
-BENCHMARK(BM_InlinedVectorSizeInlined);
-
-void BM_InlinedVectorSizeExternal(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.size());
-  }
-}
-BENCHMARK(BM_InlinedVectorSizeExternal);
-
-void BM_StdVectorSize(benchmark::State& state) {
-  std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.size());
-  }
-}
-BENCHMARK(BM_StdVectorSize);
-
-void BM_InlinedVectorEmptyInlined(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.empty());
-  }
-}
-BENCHMARK(BM_InlinedVectorEmptyInlined);
-
-void BM_InlinedVectorEmptyExternal(benchmark::State& state) {
-  absl::InlinedVector<int, 8> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.empty());
-  }
-}
-BENCHMARK(BM_InlinedVectorEmptyExternal);
-
-void BM_StdVectorEmpty(benchmark::State& state) {
-  std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(v);
-    benchmark::DoNotOptimize(v.empty());
-  }
-}
-BENCHMARK(BM_StdVectorEmpty);
-
-constexpr size_t kInlinedCapacity = 4;
-constexpr size_t kLargeSize = kInlinedCapacity * 2;
-constexpr size_t kSmallSize = kInlinedCapacity / 2;
-constexpr size_t kBatchSize = 100;
-
-#define ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_FunctionTemplate, T) \
-  BENCHMARK_TEMPLATE(BM_FunctionTemplate, T, kLargeSize);        \
-  BENCHMARK_TEMPLATE(BM_FunctionTemplate, T, kSmallSize)
-
-#define ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_FunctionTemplate, T)      \
-  BENCHMARK_TEMPLATE(BM_FunctionTemplate, T, kLargeSize, kLargeSize); \
-  BENCHMARK_TEMPLATE(BM_FunctionTemplate, T, kLargeSize, kSmallSize); \
-  BENCHMARK_TEMPLATE(BM_FunctionTemplate, T, kSmallSize, kLargeSize); \
-  BENCHMARK_TEMPLATE(BM_FunctionTemplate, T, kSmallSize, kSmallSize)
-
-template <typename T>
-using InlVec = absl::InlinedVector<T, kInlinedCapacity>;
-
-struct TrivialType {
-  size_t val;
-};
-
-class NontrivialType {
- public:
-  ABSL_ATTRIBUTE_NOINLINE NontrivialType() : val_() {
-    benchmark::DoNotOptimize(*this);
-  }
-
-  ABSL_ATTRIBUTE_NOINLINE NontrivialType(const NontrivialType& other)
-      : val_(other.val_) {
-    benchmark::DoNotOptimize(*this);
-  }
-
-  ABSL_ATTRIBUTE_NOINLINE NontrivialType& operator=(
-      const NontrivialType& other) {
-    val_ = other.val_;
-    benchmark::DoNotOptimize(*this);
-    return *this;
-  }
-
-  ABSL_ATTRIBUTE_NOINLINE ~NontrivialType() noexcept {
-    benchmark::DoNotOptimize(*this);
-  }
-
- private:
-  size_t val_;
-};
-
-template <typename T, typename PrepareVecFn, typename TestVecFn>
-void BatchedBenchmark(benchmark::State& state, PrepareVecFn prepare_vec,
-                      TestVecFn test_vec) {
-  std::array<InlVec<T>, kBatchSize> vector_batch{};
-
-  while (state.KeepRunningBatch(kBatchSize)) {
-    // Prepare batch
-    state.PauseTiming();
-    for (size_t i = 0; i < kBatchSize; ++i) {
-      prepare_vec(vector_batch.data() + i, i);
-    }
-    benchmark::DoNotOptimize(vector_batch);
-    state.ResumeTiming();
-
-    // Test batch
-    for (size_t i = 0; i < kBatchSize; ++i) {
-      test_vec(vector_batch.data() + i, i);
-    }
-  }
-}
-
-template <typename T, size_t ToSize>
-void BM_ConstructFromSize(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  auto size = ToSize;
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->~VecT(); },
-      /* test_vec = */
-      [&](void* ptr, size_t) {
-        benchmark::DoNotOptimize(size);
-        ::new (ptr) VecT(size);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromSize, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromSize, NontrivialType);
-
-template <typename T, size_t ToSize>
-void BM_ConstructFromSizeRef(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  auto size = ToSize;
-  auto ref = T();
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->~VecT(); },
-      /* test_vec = */
-      [&](void* ptr, size_t) {
-        benchmark::DoNotOptimize(size);
-        benchmark::DoNotOptimize(ref);
-        ::new (ptr) VecT(size, ref);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromSizeRef, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromSizeRef, NontrivialType);
-
-template <typename T, size_t ToSize>
-void BM_ConstructFromRange(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  std::array<T, ToSize> arr{};
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->~VecT(); },
-      /* test_vec = */
-      [&](void* ptr, size_t) {
-        benchmark::DoNotOptimize(arr);
-        ::new (ptr) VecT(arr.begin(), arr.end());
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromRange, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromRange, NontrivialType);
-
-template <typename T, size_t ToSize>
-void BM_ConstructFromCopy(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  VecT other_vec(ToSize);
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) { vec->~VecT(); },
-      /* test_vec = */
-      [&](void* ptr, size_t) {
-        benchmark::DoNotOptimize(other_vec);
-        ::new (ptr) VecT(other_vec);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromCopy, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromCopy, NontrivialType);
-
-template <typename T, size_t ToSize>
-void BM_ConstructFromMove(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  std::array<VecT, kBatchSize> vector_batch{};
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [&](InlVec<T>* vec, size_t i) {
-        vector_batch[i].clear();
-        vector_batch[i].resize(ToSize);
-        vec->~VecT();
-      },
-      /* test_vec = */
-      [&](void* ptr, size_t i) {
-        benchmark::DoNotOptimize(vector_batch[i]);
-        ::new (ptr) VecT(std::move(vector_batch[i]));
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromMove, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_ConstructFromMove, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_AssignSizeRef(benchmark::State& state) {
-  auto size = ToSize;
-  auto ref = T();
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->resize(FromSize); },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t) {
-        benchmark::DoNotOptimize(size);
-        benchmark::DoNotOptimize(ref);
-        vec->assign(size, ref);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignSizeRef, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignSizeRef, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_AssignRange(benchmark::State& state) {
-  std::array<T, ToSize> arr{};
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->resize(FromSize); },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t) {
-        benchmark::DoNotOptimize(arr);
-        vec->assign(arr.begin(), arr.end());
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignRange, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignRange, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_AssignFromCopy(benchmark::State& state) {
-  InlVec<T> other_vec(ToSize);
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->resize(FromSize); },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t) {
-        benchmark::DoNotOptimize(other_vec);
-        *vec = other_vec;
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignFromCopy, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignFromCopy, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_AssignFromMove(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  std::array<VecT, kBatchSize> vector_batch{};
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [&](InlVec<T>* vec, size_t i) {
-        vector_batch[i].clear();
-        vector_batch[i].resize(ToSize);
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t i) {
-        benchmark::DoNotOptimize(vector_batch[i]);
-        *vec = std::move(vector_batch[i]);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignFromMove, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_AssignFromMove, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_ResizeSize(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [](InlVec<T>* vec, size_t) { vec->resize(ToSize); });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_ResizeSize, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_ResizeSize, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_ResizeSizeRef(benchmark::State& state) {
-  auto t = T();
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t) {
-        benchmark::DoNotOptimize(t);
-        vec->resize(ToSize, t);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_ResizeSizeRef, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_ResizeSizeRef, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_InsertSizeRef(benchmark::State& state) {
-  auto t = T();
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t) {
-        benchmark::DoNotOptimize(t);
-        auto* pos = vec->data() + (vec->size() / 2);
-        vec->insert(pos, t);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_InsertSizeRef, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_InsertSizeRef, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_InsertRange(benchmark::State& state) {
-  InlVec<T> other_vec(ToSize);
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t) {
-        benchmark::DoNotOptimize(other_vec);
-        auto* pos = vec->data() + (vec->size() / 2);
-        vec->insert(pos, other_vec.begin(), other_vec.end());
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_InsertRange, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_InsertRange, NontrivialType);
-
-template <typename T, size_t FromSize>
-void BM_EmplaceBack(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [](InlVec<T>* vec, size_t) { vec->emplace_back(); });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_EmplaceBack, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_EmplaceBack, NontrivialType);
-
-template <typename T, size_t FromSize>
-void BM_PopBack(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [](InlVec<T>* vec, size_t) { vec->pop_back(); });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_PopBack, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_PopBack, NontrivialType);
-
-template <typename T, size_t FromSize>
-void BM_EraseOne(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [](InlVec<T>* vec, size_t) {
-        auto* pos = vec->data() + (vec->size() / 2);
-        vec->erase(pos);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_EraseOne, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_EraseOne, NontrivialType);
-
-template <typename T, size_t FromSize>
-void BM_EraseRange(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [](InlVec<T>* vec, size_t) {
-        auto* pos = vec->data() + (vec->size() / 2);
-        vec->erase(pos, pos + 1);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_EraseRange, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_EraseRange, NontrivialType);
-
-template <typename T, size_t FromSize>
-void BM_Clear(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */ [](InlVec<T>* vec, size_t) { vec->resize(FromSize); },
-      /* test_vec = */ [](InlVec<T>* vec, size_t) { vec->clear(); });
-}
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_Clear, TrivialType);
-ABSL_INTERNAL_BENCHMARK_ONE_SIZE(BM_Clear, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToCapacity>
-void BM_Reserve(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [](InlVec<T>* vec, size_t) { vec->reserve(ToCapacity); });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_Reserve, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_Reserve, NontrivialType);
-
-template <typename T, size_t FromCapacity, size_t ToCapacity>
-void BM_ShrinkToFit(benchmark::State& state) {
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [](InlVec<T>* vec, size_t) {
-        vec->clear();
-        vec->resize(ToCapacity);
-        vec->reserve(FromCapacity);
-      },
-      /* test_vec = */ [](InlVec<T>* vec, size_t) { vec->shrink_to_fit(); });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_ShrinkToFit, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_ShrinkToFit, NontrivialType);
-
-template <typename T, size_t FromSize, size_t ToSize>
-void BM_Swap(benchmark::State& state) {
-  using VecT = InlVec<T>;
-  std::array<VecT, kBatchSize> vector_batch{};
-  BatchedBenchmark<T>(
-      state,
-      /* prepare_vec = */
-      [&](InlVec<T>* vec, size_t i) {
-        vector_batch[i].clear();
-        vector_batch[i].resize(ToSize);
-        vec->resize(FromSize);
-      },
-      /* test_vec = */
-      [&](InlVec<T>* vec, size_t i) {
-        using std::swap;
-        benchmark::DoNotOptimize(vector_batch[i]);
-        swap(*vec, vector_batch[i]);
-      });
-}
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_Swap, TrivialType);
-ABSL_INTERNAL_BENCHMARK_TWO_SIZE(BM_Swap, NontrivialType);
-
-}  // namespace
diff --git a/third_party/abseil/absl/container/inlined_vector_exception_safety_test.cc b/third_party/abseil/absl/container/inlined_vector_exception_safety_test.cc
deleted file mode 100644
index 0e6a05b..0000000
--- a/third_party/abseil/absl/container/inlined_vector_exception_safety_test.cc
+++ /dev/null
@@ -1,508 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/inlined_vector.h"
-
-#include "absl/base/config.h"
-
-#if defined(ABSL_HAVE_EXCEPTIONS)
-
-#include <array>
-#include <initializer_list>
-#include <iterator>
-#include <memory>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/exception_safety_testing.h"
-
-namespace {
-
-constexpr size_t kInlinedCapacity = 4;
-constexpr size_t kLargeSize = kInlinedCapacity * 2;
-constexpr size_t kSmallSize = kInlinedCapacity / 2;
-
-using Thrower = testing::ThrowingValue<>;
-using MovableThrower = testing::ThrowingValue<testing::TypeSpec::kNoThrowMove>;
-using ThrowAlloc = testing::ThrowingAllocator<Thrower>;
-
-using ThrowerVec = absl::InlinedVector<Thrower, kInlinedCapacity>;
-using MovableThrowerVec = absl::InlinedVector<MovableThrower, kInlinedCapacity>;
-
-using ThrowAllocThrowerVec =
-    absl::InlinedVector<Thrower, kInlinedCapacity, ThrowAlloc>;
-using ThrowAllocMovableThrowerVec =
-    absl::InlinedVector<MovableThrower, kInlinedCapacity, ThrowAlloc>;
-
-// In GCC, if an element of a `std::initializer_list` throws during construction
-// the elements that were constructed before it are not destroyed. This causes
-// incorrect exception safety test failures. Thus, `testing::nothrow_ctor` is
-// required. See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66139
-#define ABSL_INTERNAL_MAKE_INIT_LIST(T, N)                     \
-  (N > kInlinedCapacity                                        \
-       ? std::initializer_list<T>{T(0, testing::nothrow_ctor), \
-                                  T(1, testing::nothrow_ctor), \
-                                  T(2, testing::nothrow_ctor), \
-                                  T(3, testing::nothrow_ctor), \
-                                  T(4, testing::nothrow_ctor), \
-                                  T(5, testing::nothrow_ctor), \
-                                  T(6, testing::nothrow_ctor), \
-                                  T(7, testing::nothrow_ctor)} \
-                                                               \
-       : std::initializer_list<T>{T(0, testing::nothrow_ctor), \
-                                  T(1, testing::nothrow_ctor)})
-static_assert(kLargeSize == 8, "Must update ABSL_INTERNAL_MAKE_INIT_LIST(...)");
-static_assert(kSmallSize == 2, "Must update ABSL_INTERNAL_MAKE_INIT_LIST(...)");
-
-template <typename TheVecT, size_t... TheSizes>
-class TestParams {
- public:
-  using VecT = TheVecT;
-  constexpr static size_t GetSizeAt(size_t i) { return kSizes[1 + i]; }
-
- private:
-  constexpr static size_t kSizes[1 + sizeof...(TheSizes)] = {1, TheSizes...};
-};
-
-using NoSizeTestParams =
-    ::testing::Types<TestParams<ThrowerVec>, TestParams<MovableThrowerVec>,
-                     TestParams<ThrowAllocThrowerVec>,
-                     TestParams<ThrowAllocMovableThrowerVec>>;
-
-using OneSizeTestParams =
-    ::testing::Types<TestParams<ThrowerVec, kLargeSize>,
-                     TestParams<ThrowerVec, kSmallSize>,
-                     TestParams<MovableThrowerVec, kLargeSize>,
-                     TestParams<MovableThrowerVec, kSmallSize>,
-                     TestParams<ThrowAllocThrowerVec, kLargeSize>,
-                     TestParams<ThrowAllocThrowerVec, kSmallSize>,
-                     TestParams<ThrowAllocMovableThrowerVec, kLargeSize>,
-                     TestParams<ThrowAllocMovableThrowerVec, kSmallSize>>;
-
-using TwoSizeTestParams = ::testing::Types<
-    TestParams<ThrowerVec, kLargeSize, kLargeSize>,
-    TestParams<ThrowerVec, kLargeSize, kSmallSize>,
-    TestParams<ThrowerVec, kSmallSize, kLargeSize>,
-    TestParams<ThrowerVec, kSmallSize, kSmallSize>,
-    TestParams<MovableThrowerVec, kLargeSize, kLargeSize>,
-    TestParams<MovableThrowerVec, kLargeSize, kSmallSize>,
-    TestParams<MovableThrowerVec, kSmallSize, kLargeSize>,
-    TestParams<MovableThrowerVec, kSmallSize, kSmallSize>,
-    TestParams<ThrowAllocThrowerVec, kLargeSize, kLargeSize>,
-    TestParams<ThrowAllocThrowerVec, kLargeSize, kSmallSize>,
-    TestParams<ThrowAllocThrowerVec, kSmallSize, kLargeSize>,
-    TestParams<ThrowAllocThrowerVec, kSmallSize, kSmallSize>,
-    TestParams<ThrowAllocMovableThrowerVec, kLargeSize, kLargeSize>,
-    TestParams<ThrowAllocMovableThrowerVec, kLargeSize, kSmallSize>,
-    TestParams<ThrowAllocMovableThrowerVec, kSmallSize, kLargeSize>,
-    TestParams<ThrowAllocMovableThrowerVec, kSmallSize, kSmallSize>>;
-
-template <typename>
-struct NoSizeTest : ::testing::Test {};
-TYPED_TEST_SUITE(NoSizeTest, NoSizeTestParams);
-
-template <typename>
-struct OneSizeTest : ::testing::Test {};
-TYPED_TEST_SUITE(OneSizeTest, OneSizeTestParams);
-
-template <typename>
-struct TwoSizeTest : ::testing::Test {};
-TYPED_TEST_SUITE(TwoSizeTest, TwoSizeTestParams);
-
-template <typename VecT>
-bool InlinedVectorInvariants(VecT* vec) {
-  if (*vec != *vec) return false;
-  if (vec->size() > vec->capacity()) return false;
-  if (vec->size() > vec->max_size()) return false;
-  if (vec->capacity() > vec->max_size()) return false;
-  if (vec->data() != std::addressof(vec->at(0))) return false;
-  if (vec->data() != vec->begin()) return false;
-  if (*vec->data() != *vec->begin()) return false;
-  if (vec->begin() > vec->end()) return false;
-  if ((vec->end() - vec->begin()) != vec->size()) return false;
-  if (std::distance(vec->begin(), vec->end()) != vec->size()) return false;
-  return true;
-}
-
-// Function that always returns false is correct, but refactoring is required
-// for clarity. It's needed to express that, as a contract, certain operations
-// should not throw at all. Execution of this function means an exception was
-// thrown and thus the test should fail.
-// TODO(johnsoncj): Add `testing::NoThrowGuarantee` to the framework
-template <typename VecT>
-bool NoThrowGuarantee(VecT* /* vec */) {
-  return false;
-}
-
-TYPED_TEST(NoSizeTest, DefaultConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using allocator_type = typename VecT::allocator_type;
-
-  testing::TestThrowingCtor<VecT>();
-
-  testing::TestThrowingCtor<VecT>(allocator_type{});
-}
-
-TYPED_TEST(OneSizeTest, SizeConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using allocator_type = typename VecT::allocator_type;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  testing::TestThrowingCtor<VecT>(size);
-
-  testing::TestThrowingCtor<VecT>(size, allocator_type{});
-}
-
-TYPED_TEST(OneSizeTest, SizeRefConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  using allocator_type = typename VecT::allocator_type;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  testing::TestThrowingCtor<VecT>(size, value_type{});
-
-  testing::TestThrowingCtor<VecT>(size, value_type{}, allocator_type{});
-}
-
-TYPED_TEST(OneSizeTest, InitializerListConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  using allocator_type = typename VecT::allocator_type;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  testing::TestThrowingCtor<VecT>(
-      ABSL_INTERNAL_MAKE_INIT_LIST(value_type, size));
-
-  testing::TestThrowingCtor<VecT>(
-      ABSL_INTERNAL_MAKE_INIT_LIST(value_type, size), allocator_type{});
-}
-
-TYPED_TEST(OneSizeTest, RangeConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  using allocator_type = typename VecT::allocator_type;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  std::array<value_type, size> arr{};
-
-  testing::TestThrowingCtor<VecT>(arr.begin(), arr.end());
-
-  testing::TestThrowingCtor<VecT>(arr.begin(), arr.end(), allocator_type{});
-}
-
-TYPED_TEST(OneSizeTest, CopyConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using allocator_type = typename VecT::allocator_type;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  VecT other_vec{size};
-
-  testing::TestThrowingCtor<VecT>(other_vec);
-
-  testing::TestThrowingCtor<VecT>(other_vec, allocator_type{});
-}
-
-TYPED_TEST(OneSizeTest, MoveConstructor) {
-  using VecT = typename TypeParam::VecT;
-  using allocator_type = typename VecT::allocator_type;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  if (!absl::allocator_is_nothrow<allocator_type>::value) {
-    testing::TestThrowingCtor<VecT>(VecT{size});
-
-    testing::TestThrowingCtor<VecT>(VecT{size}, allocator_type{});
-  }
-}
-
-TYPED_TEST(TwoSizeTest, Assign) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  constexpr static auto from_size = TypeParam::GetSizeAt(0);
-  constexpr static auto to_size = TypeParam::GetSizeAt(1);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{from_size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    *vec = ABSL_INTERNAL_MAKE_INIT_LIST(value_type, to_size);
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    VecT other_vec{to_size};
-    *vec = other_vec;
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    VecT other_vec{to_size};
-    *vec = std::move(other_vec);
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    value_type val{};
-    vec->assign(to_size, val);
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    vec->assign(ABSL_INTERNAL_MAKE_INIT_LIST(value_type, to_size));
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    std::array<value_type, to_size> arr{};
-    vec->assign(arr.begin(), arr.end());
-  }));
-}
-
-TYPED_TEST(TwoSizeTest, Resize) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  constexpr static auto from_size = TypeParam::GetSizeAt(0);
-  constexpr static auto to_size = TypeParam::GetSizeAt(1);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{from_size})
-                    .WithContracts(InlinedVectorInvariants<VecT>,
-                                   testing::strong_guarantee);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    vec->resize(to_size);  //
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    vec->resize(to_size, value_type{});  //
-  }));
-}
-
-TYPED_TEST(OneSizeTest, Insert) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  constexpr static auto from_size = TypeParam::GetSizeAt(0);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{from_size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    vec->insert(it, value_type{});
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    vec->insert(it, value_type{});
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->end();
-    vec->insert(it, value_type{});
-  }));
-}
-
-TYPED_TEST(TwoSizeTest, Insert) {
-  using VecT = typename TypeParam::VecT;
-  using value_type = typename VecT::value_type;
-  constexpr static auto from_size = TypeParam::GetSizeAt(0);
-  constexpr static auto count = TypeParam::GetSizeAt(1);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{from_size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    vec->insert(it, count, value_type{});
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    vec->insert(it, count, value_type{});
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->end();
-    vec->insert(it, count, value_type{});
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    vec->insert(it, ABSL_INTERNAL_MAKE_INIT_LIST(value_type, count));
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    vec->insert(it, ABSL_INTERNAL_MAKE_INIT_LIST(value_type, count));
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->end();
-    vec->insert(it, ABSL_INTERNAL_MAKE_INIT_LIST(value_type, count));
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    std::array<value_type, count> arr{};
-    vec->insert(it, arr.begin(), arr.end());
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    std::array<value_type, count> arr{};
-    vec->insert(it, arr.begin(), arr.end());
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->end();
-    std::array<value_type, count> arr{};
-    vec->insert(it, arr.begin(), arr.end());
-  }));
-}
-
-TYPED_TEST(OneSizeTest, EmplaceBack) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  // For testing calls to `emplace_back(...)` that reallocate.
-  VecT full_vec{size};
-  full_vec.resize(full_vec.capacity());
-
-  // For testing calls to `emplace_back(...)` that don't reallocate.
-  VecT nonfull_vec{size};
-  nonfull_vec.reserve(size + 1);
-
-  auto tester = testing::MakeExceptionSafetyTester().WithContracts(
-      InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.WithInitialValue(nonfull_vec).Test([](VecT* vec) {
-    vec->emplace_back();
-  }));
-
-  EXPECT_TRUE(tester.WithInitialValue(full_vec).Test(
-      [](VecT* vec) { vec->emplace_back(); }));
-}
-
-TYPED_TEST(OneSizeTest, PopBack) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{size})
-                    .WithContracts(NoThrowGuarantee<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    vec->pop_back();  //
-  }));
-}
-
-TYPED_TEST(OneSizeTest, Erase) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    vec->erase(it);
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    vec->erase(it);
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() - 1);
-    vec->erase(it);
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    vec->erase(it, it);
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    vec->erase(it, it);
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() - 1);
-    vec->erase(it, it);
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin();
-    vec->erase(it, it + 1);
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() / 2);
-    vec->erase(it, it + 1);
-  }));
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    auto it = vec->begin() + (vec->size() - 1);
-    vec->erase(it, it + 1);
-  }));
-}
-
-TYPED_TEST(OneSizeTest, Clear) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{size})
-                    .WithContracts(NoThrowGuarantee<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    vec->clear();  //
-  }));
-}
-
-TYPED_TEST(TwoSizeTest, Reserve) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto from_size = TypeParam::GetSizeAt(0);
-  constexpr static auto to_capacity = TypeParam::GetSizeAt(1);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{from_size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) { vec->reserve(to_capacity); }));
-}
-
-TYPED_TEST(OneSizeTest, ShrinkToFit) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto size = TypeParam::GetSizeAt(0);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    vec->shrink_to_fit();  //
-  }));
-}
-
-TYPED_TEST(TwoSizeTest, Swap) {
-  using VecT = typename TypeParam::VecT;
-  constexpr static auto from_size = TypeParam::GetSizeAt(0);
-  constexpr static auto to_size = TypeParam::GetSizeAt(1);
-
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(VecT{from_size})
-                    .WithContracts(InlinedVectorInvariants<VecT>);
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    VecT other_vec{to_size};
-    vec->swap(other_vec);
-  }));
-
-  EXPECT_TRUE(tester.Test([](VecT* vec) {
-    using std::swap;
-    VecT other_vec{to_size};
-    swap(*vec, other_vec);
-  }));
-}
-
-}  // namespace
-
-#endif  // defined(ABSL_HAVE_EXCEPTIONS)
diff --git a/third_party/abseil/absl/container/inlined_vector_test.cc b/third_party/abseil/absl/container/inlined_vector_test.cc
deleted file mode 100644
index 98aff33..0000000
--- a/third_party/abseil/absl/container/inlined_vector_test.cc
+++ /dev/null
@@ -1,1815 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/inlined_vector.h"
-
-#include <algorithm>
-#include <forward_list>
-#include <list>
-#include <memory>
-#include <scoped_allocator>
-#include <sstream>
-#include <stdexcept>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/internal/exception_testing.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/base/options.h"
-#include "absl/container/internal/counting_allocator.h"
-#include "absl/container/internal/test_instance_tracker.h"
-#include "absl/hash/hash_testing.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-using absl::container_internal::CountingAllocator;
-using absl::test_internal::CopyableMovableInstance;
-using absl::test_internal::CopyableOnlyInstance;
-using absl::test_internal::InstanceTracker;
-using testing::AllOf;
-using testing::Each;
-using testing::ElementsAre;
-using testing::ElementsAreArray;
-using testing::Eq;
-using testing::Gt;
-using testing::PrintToString;
-
-using IntVec = absl::InlinedVector<int, 8>;
-
-MATCHER_P(SizeIs, n, "") {
-  return testing::ExplainMatchResult(n, arg.size(), result_listener);
-}
-
-MATCHER_P(CapacityIs, n, "") {
-  return testing::ExplainMatchResult(n, arg.capacity(), result_listener);
-}
-
-MATCHER_P(ValueIs, e, "") {
-  return testing::ExplainMatchResult(e, arg.value(), result_listener);
-}
-
-// TODO(bsamwel): Add support for movable-only types.
-
-// Test fixture for typed tests on BaseCountedInstance derived classes, see
-// test_instance_tracker.h.
-template <typename T>
-class InstanceTest : public ::testing::Test {};
-TYPED_TEST_SUITE_P(InstanceTest);
-
-// A simple reference counted class to make sure that the proper elements are
-// destroyed in the erase(begin, end) test.
-class RefCounted {
- public:
-  RefCounted(int value, int* count) : value_(value), count_(count) { Ref(); }
-
-  RefCounted(const RefCounted& v) : value_(v.value_), count_(v.count_) {
-    Ref();
-  }
-
-  ~RefCounted() {
-    Unref();
-    count_ = nullptr;
-  }
-
-  friend void swap(RefCounted& a, RefCounted& b) {
-    using std::swap;
-    swap(a.value_, b.value_);
-    swap(a.count_, b.count_);
-  }
-
-  RefCounted& operator=(RefCounted v) {
-    using std::swap;
-    swap(*this, v);
-    return *this;
-  }
-
-  void Ref() const {
-    ABSL_RAW_CHECK(count_ != nullptr, "");
-    ++(*count_);
-  }
-
-  void Unref() const {
-    --(*count_);
-    ABSL_RAW_CHECK(*count_ >= 0, "");
-  }
-
-  int value_;
-  int* count_;
-};
-
-using RefCountedVec = absl::InlinedVector<RefCounted, 8>;
-
-// A class with a vtable pointer
-class Dynamic {
- public:
-  virtual ~Dynamic() {}
-};
-
-using DynamicVec = absl::InlinedVector<Dynamic, 8>;
-
-// Append 0..len-1 to *v
-template <typename Container>
-static void Fill(Container* v, int len, int offset = 0) {
-  for (int i = 0; i < len; i++) {
-    v->push_back(i + offset);
-  }
-}
-
-static IntVec Fill(int len, int offset = 0) {
-  IntVec v;
-  Fill(&v, len, offset);
-  return v;
-}
-
-TEST(IntVec, SimpleOps) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v;
-    const IntVec& cv = v;  // const alias
-
-    Fill(&v, len);
-    EXPECT_EQ(len, v.size());
-    EXPECT_LE(len, v.capacity());
-
-    for (int i = 0; i < len; i++) {
-      EXPECT_EQ(i, v[i]);
-      EXPECT_EQ(i, v.at(i));
-    }
-    EXPECT_EQ(v.begin(), v.data());
-    EXPECT_EQ(cv.begin(), cv.data());
-
-    int counter = 0;
-    for (IntVec::iterator iter = v.begin(); iter != v.end(); ++iter) {
-      EXPECT_EQ(counter, *iter);
-      counter++;
-    }
-    EXPECT_EQ(counter, len);
-
-    counter = 0;
-    for (IntVec::const_iterator iter = v.begin(); iter != v.end(); ++iter) {
-      EXPECT_EQ(counter, *iter);
-      counter++;
-    }
-    EXPECT_EQ(counter, len);
-
-    counter = 0;
-    for (IntVec::const_iterator iter = v.cbegin(); iter != v.cend(); ++iter) {
-      EXPECT_EQ(counter, *iter);
-      counter++;
-    }
-    EXPECT_EQ(counter, len);
-
-    if (len > 0) {
-      EXPECT_EQ(0, v.front());
-      EXPECT_EQ(len - 1, v.back());
-      v.pop_back();
-      EXPECT_EQ(len - 1, v.size());
-      for (int i = 0; i < v.size(); ++i) {
-        EXPECT_EQ(i, v[i]);
-        EXPECT_EQ(i, v.at(i));
-      }
-    }
-  }
-}
-
-TEST(IntVec, PopBackNoOverflow) {
-  IntVec v = {1};
-  v.pop_back();
-  EXPECT_EQ(v.size(), 0);
-}
-
-TEST(IntVec, AtThrows) {
-  IntVec v = {1, 2, 3};
-  EXPECT_EQ(v.at(2), 3);
-  ABSL_BASE_INTERNAL_EXPECT_FAIL(v.at(3), std::out_of_range,
-                                 "failed bounds check");
-}
-
-TEST(IntVec, ReverseIterator) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v;
-    Fill(&v, len);
-
-    int counter = len;
-    for (IntVec::reverse_iterator iter = v.rbegin(); iter != v.rend(); ++iter) {
-      counter--;
-      EXPECT_EQ(counter, *iter);
-    }
-    EXPECT_EQ(counter, 0);
-
-    counter = len;
-    for (IntVec::const_reverse_iterator iter = v.rbegin(); iter != v.rend();
-         ++iter) {
-      counter--;
-      EXPECT_EQ(counter, *iter);
-    }
-    EXPECT_EQ(counter, 0);
-
-    counter = len;
-    for (IntVec::const_reverse_iterator iter = v.crbegin(); iter != v.crend();
-         ++iter) {
-      counter--;
-      EXPECT_EQ(counter, *iter);
-    }
-    EXPECT_EQ(counter, 0);
-  }
-}
-
-TEST(IntVec, Erase) {
-  for (int len = 1; len < 20; len++) {
-    for (int i = 0; i < len; ++i) {
-      IntVec v;
-      Fill(&v, len);
-      v.erase(v.begin() + i);
-      EXPECT_EQ(len - 1, v.size());
-      for (int j = 0; j < i; ++j) {
-        EXPECT_EQ(j, v[j]);
-      }
-      for (int j = i; j < len - 1; ++j) {
-        EXPECT_EQ(j + 1, v[j]);
-      }
-    }
-  }
-}
-
-TEST(IntVec, Hardened) {
-  IntVec v;
-  Fill(&v, 10);
-  EXPECT_EQ(v[9], 9);
-#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
-  EXPECT_DEATH_IF_SUPPORTED(v[10], "");
-  EXPECT_DEATH_IF_SUPPORTED(v[-1], "");
-#endif
-}
-
-// At the end of this test loop, the elements between [erase_begin, erase_end)
-// should have reference counts == 0, and all others elements should have
-// reference counts == 1.
-TEST(RefCountedVec, EraseBeginEnd) {
-  for (int len = 1; len < 20; ++len) {
-    for (int erase_begin = 0; erase_begin < len; ++erase_begin) {
-      for (int erase_end = erase_begin; erase_end <= len; ++erase_end) {
-        std::vector<int> counts(len, 0);
-        RefCountedVec v;
-        for (int i = 0; i < len; ++i) {
-          v.push_back(RefCounted(i, &counts[i]));
-        }
-
-        int erase_len = erase_end - erase_begin;
-
-        v.erase(v.begin() + erase_begin, v.begin() + erase_end);
-
-        EXPECT_EQ(len - erase_len, v.size());
-
-        // Check the elements before the first element erased.
-        for (int i = 0; i < erase_begin; ++i) {
-          EXPECT_EQ(i, v[i].value_);
-        }
-
-        // Check the elements after the first element erased.
-        for (int i = erase_begin; i < v.size(); ++i) {
-          EXPECT_EQ(i + erase_len, v[i].value_);
-        }
-
-        // Check that the elements at the beginning are preserved.
-        for (int i = 0; i < erase_begin; ++i) {
-          EXPECT_EQ(1, counts[i]);
-        }
-
-        // Check that the erased elements are destroyed
-        for (int i = erase_begin; i < erase_end; ++i) {
-          EXPECT_EQ(0, counts[i]);
-        }
-
-        // Check that the elements at the end are preserved.
-        for (int i = erase_end; i < len; ++i) {
-          EXPECT_EQ(1, counts[i]);
-        }
-      }
-    }
-  }
-}
-
-struct NoDefaultCtor {
-  explicit NoDefaultCtor(int) {}
-};
-struct NoCopy {
-  NoCopy() {}
-  NoCopy(const NoCopy&) = delete;
-};
-struct NoAssign {
-  NoAssign() {}
-  NoAssign& operator=(const NoAssign&) = delete;
-};
-struct MoveOnly {
-  MoveOnly() {}
-  MoveOnly(MoveOnly&&) = default;
-  MoveOnly& operator=(MoveOnly&&) = default;
-};
-TEST(InlinedVectorTest, NoDefaultCtor) {
-  absl::InlinedVector<NoDefaultCtor, 1> v(10, NoDefaultCtor(2));
-  (void)v;
-}
-TEST(InlinedVectorTest, NoCopy) {
-  absl::InlinedVector<NoCopy, 1> v(10);
-  (void)v;
-}
-TEST(InlinedVectorTest, NoAssign) {
-  absl::InlinedVector<NoAssign, 1> v(10);
-  (void)v;
-}
-TEST(InlinedVectorTest, MoveOnly) {
-  absl::InlinedVector<MoveOnly, 2> v;
-  v.push_back(MoveOnly{});
-  v.push_back(MoveOnly{});
-  v.push_back(MoveOnly{});
-  v.erase(v.begin());
-  v.push_back(MoveOnly{});
-  v.erase(v.begin(), v.begin() + 1);
-  v.insert(v.begin(), MoveOnly{});
-  v.emplace(v.begin());
-  v.emplace(v.begin(), MoveOnly{});
-}
-TEST(InlinedVectorTest, Noexcept) {
-  EXPECT_TRUE(std::is_nothrow_move_constructible<IntVec>::value);
-  EXPECT_TRUE((std::is_nothrow_move_constructible<
-               absl::InlinedVector<MoveOnly, 2>>::value));
-
-  struct MoveCanThrow {
-    MoveCanThrow(MoveCanThrow&&) {}
-  };
-  EXPECT_EQ(absl::default_allocator_is_nothrow::value,
-            (std::is_nothrow_move_constructible<
-                absl::InlinedVector<MoveCanThrow, 2>>::value));
-}
-
-TEST(InlinedVectorTest, EmplaceBack) {
-  absl::InlinedVector<std::pair<std::string, int>, 1> v;
-
-  auto& inlined_element = v.emplace_back("answer", 42);
-  EXPECT_EQ(&inlined_element, &v[0]);
-  EXPECT_EQ(inlined_element.first, "answer");
-  EXPECT_EQ(inlined_element.second, 42);
-
-  auto& allocated_element = v.emplace_back("taxicab", 1729);
-  EXPECT_EQ(&allocated_element, &v[1]);
-  EXPECT_EQ(allocated_element.first, "taxicab");
-  EXPECT_EQ(allocated_element.second, 1729);
-}
-
-TEST(InlinedVectorTest, ShrinkToFitGrowingVector) {
-  absl::InlinedVector<std::pair<std::string, int>, 1> v;
-
-  v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 1);
-
-  v.emplace_back("answer", 42);
-  v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 1);
-
-  v.emplace_back("taxicab", 1729);
-  EXPECT_GE(v.capacity(), 2);
-  v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 2);
-
-  v.reserve(100);
-  EXPECT_GE(v.capacity(), 100);
-  v.shrink_to_fit();
-  EXPECT_EQ(v.capacity(), 2);
-}
-
-TEST(InlinedVectorTest, ShrinkToFitEdgeCases) {
-  {
-    absl::InlinedVector<std::pair<std::string, int>, 1> v;
-    v.emplace_back("answer", 42);
-    v.emplace_back("taxicab", 1729);
-    EXPECT_GE(v.capacity(), 2);
-    v.pop_back();
-    v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 1);
-    EXPECT_EQ(v[0].first, "answer");
-    EXPECT_EQ(v[0].second, 42);
-  }
-
-  {
-    absl::InlinedVector<std::string, 2> v(100);
-    v.resize(0);
-    v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 2);  // inlined capacity
-  }
-
-  {
-    absl::InlinedVector<std::string, 2> v(100);
-    v.resize(1);
-    v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 2);  // inlined capacity
-  }
-
-  {
-    absl::InlinedVector<std::string, 2> v(100);
-    v.resize(2);
-    v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 2);
-  }
-
-  {
-    absl::InlinedVector<std::string, 2> v(100);
-    v.resize(3);
-    v.shrink_to_fit();
-    EXPECT_EQ(v.capacity(), 3);
-  }
-}
-
-TEST(IntVec, Insert) {
-  for (int len = 0; len < 20; len++) {
-    for (int pos = 0; pos <= len; pos++) {
-      {
-        // Single element
-        std::vector<int> std_v;
-        Fill(&std_v, len);
-        IntVec v;
-        Fill(&v, len);
-
-        std_v.insert(std_v.begin() + pos, 9999);
-        IntVec::iterator it = v.insert(v.cbegin() + pos, 9999);
-        EXPECT_THAT(v, ElementsAreArray(std_v));
-        EXPECT_EQ(it, v.cbegin() + pos);
-      }
-      {
-        // n elements
-        std::vector<int> std_v;
-        Fill(&std_v, len);
-        IntVec v;
-        Fill(&v, len);
-
-        IntVec::size_type n = 5;
-        std_v.insert(std_v.begin() + pos, n, 9999);
-        IntVec::iterator it = v.insert(v.cbegin() + pos, n, 9999);
-        EXPECT_THAT(v, ElementsAreArray(std_v));
-        EXPECT_EQ(it, v.cbegin() + pos);
-      }
-      {
-        // Iterator range (random access iterator)
-        std::vector<int> std_v;
-        Fill(&std_v, len);
-        IntVec v;
-        Fill(&v, len);
-
-        const std::vector<int> input = {9999, 8888, 7777};
-        std_v.insert(std_v.begin() + pos, input.cbegin(), input.cend());
-        IntVec::iterator it =
-            v.insert(v.cbegin() + pos, input.cbegin(), input.cend());
-        EXPECT_THAT(v, ElementsAreArray(std_v));
-        EXPECT_EQ(it, v.cbegin() + pos);
-      }
-      {
-        // Iterator range (forward iterator)
-        std::vector<int> std_v;
-        Fill(&std_v, len);
-        IntVec v;
-        Fill(&v, len);
-
-        const std::forward_list<int> input = {9999, 8888, 7777};
-        std_v.insert(std_v.begin() + pos, input.cbegin(), input.cend());
-        IntVec::iterator it =
-            v.insert(v.cbegin() + pos, input.cbegin(), input.cend());
-        EXPECT_THAT(v, ElementsAreArray(std_v));
-        EXPECT_EQ(it, v.cbegin() + pos);
-      }
-      {
-        // Iterator range (input iterator)
-        std::vector<int> std_v;
-        Fill(&std_v, len);
-        IntVec v;
-        Fill(&v, len);
-
-        std_v.insert(std_v.begin() + pos, {9999, 8888, 7777});
-        std::istringstream input("9999 8888 7777");
-        IntVec::iterator it =
-            v.insert(v.cbegin() + pos, std::istream_iterator<int>(input),
-                     std::istream_iterator<int>());
-        EXPECT_THAT(v, ElementsAreArray(std_v));
-        EXPECT_EQ(it, v.cbegin() + pos);
-      }
-      {
-        // Initializer list
-        std::vector<int> std_v;
-        Fill(&std_v, len);
-        IntVec v;
-        Fill(&v, len);
-
-        std_v.insert(std_v.begin() + pos, {9999, 8888});
-        IntVec::iterator it = v.insert(v.cbegin() + pos, {9999, 8888});
-        EXPECT_THAT(v, ElementsAreArray(std_v));
-        EXPECT_EQ(it, v.cbegin() + pos);
-      }
-    }
-  }
-}
-
-TEST(RefCountedVec, InsertConstructorDestructor) {
-  // Make sure the proper construction/destruction happen during insert
-  // operations.
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    for (int pos = 0; pos <= len; pos++) {
-      SCOPED_TRACE(pos);
-      std::vector<int> counts(len, 0);
-      int inserted_count = 0;
-      RefCountedVec v;
-      for (int i = 0; i < len; ++i) {
-        SCOPED_TRACE(i);
-        v.push_back(RefCounted(i, &counts[i]));
-      }
-
-      EXPECT_THAT(counts, Each(Eq(1)));
-
-      RefCounted insert_element(9999, &inserted_count);
-      EXPECT_EQ(1, inserted_count);
-      v.insert(v.begin() + pos, insert_element);
-      EXPECT_EQ(2, inserted_count);
-      // Check that the elements at the end are preserved.
-      EXPECT_THAT(counts, Each(Eq(1)));
-      EXPECT_EQ(2, inserted_count);
-    }
-  }
-}
-
-TEST(IntVec, Resize) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v;
-    Fill(&v, len);
-
-    // Try resizing up and down by k elements
-    static const int kResizeElem = 1000000;
-    for (int k = 0; k < 10; k++) {
-      // Enlarging resize
-      v.resize(len + k, kResizeElem);
-      EXPECT_EQ(len + k, v.size());
-      EXPECT_LE(len + k, v.capacity());
-      for (int i = 0; i < len + k; i++) {
-        if (i < len) {
-          EXPECT_EQ(i, v[i]);
-        } else {
-          EXPECT_EQ(kResizeElem, v[i]);
-        }
-      }
-
-      // Shrinking resize
-      v.resize(len, kResizeElem);
-      EXPECT_EQ(len, v.size());
-      EXPECT_LE(len, v.capacity());
-      for (int i = 0; i < len; i++) {
-        EXPECT_EQ(i, v[i]);
-      }
-    }
-  }
-}
-
-TEST(IntVec, InitWithLength) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v(len, 7);
-    EXPECT_EQ(len, v.size());
-    EXPECT_LE(len, v.capacity());
-    for (int i = 0; i < len; i++) {
-      EXPECT_EQ(7, v[i]);
-    }
-  }
-}
-
-TEST(IntVec, CopyConstructorAndAssignment) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v;
-    Fill(&v, len);
-    EXPECT_EQ(len, v.size());
-    EXPECT_LE(len, v.capacity());
-
-    IntVec v2(v);
-    EXPECT_TRUE(v == v2) << PrintToString(v) << PrintToString(v2);
-
-    for (int start_len = 0; start_len < 20; start_len++) {
-      IntVec v3;
-      Fill(&v3, start_len, 99);  // Add dummy elements that should go away
-      v3 = v;
-      EXPECT_TRUE(v == v3) << PrintToString(v) << PrintToString(v3);
-    }
-  }
-}
-
-TEST(IntVec, AliasingCopyAssignment) {
-  for (int len = 0; len < 20; ++len) {
-    IntVec original;
-    Fill(&original, len);
-    IntVec dup = original;
-    dup = *&dup;
-    EXPECT_EQ(dup, original);
-  }
-}
-
-TEST(IntVec, MoveConstructorAndAssignment) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v_in;
-    const int inlined_capacity = v_in.capacity();
-    Fill(&v_in, len);
-    EXPECT_EQ(len, v_in.size());
-    EXPECT_LE(len, v_in.capacity());
-
-    {
-      IntVec v_temp(v_in);
-      auto* old_data = v_temp.data();
-      IntVec v_out(std::move(v_temp));
-      EXPECT_TRUE(v_in == v_out) << PrintToString(v_in) << PrintToString(v_out);
-      if (v_in.size() > inlined_capacity) {
-        // Allocation is moved as a whole, data stays in place.
-        EXPECT_TRUE(v_out.data() == old_data);
-      } else {
-        EXPECT_FALSE(v_out.data() == old_data);
-      }
-    }
-    for (int start_len = 0; start_len < 20; start_len++) {
-      IntVec v_out;
-      Fill(&v_out, start_len, 99);  // Add dummy elements that should go away
-      IntVec v_temp(v_in);
-      auto* old_data = v_temp.data();
-      v_out = std::move(v_temp);
-      EXPECT_TRUE(v_in == v_out) << PrintToString(v_in) << PrintToString(v_out);
-      if (v_in.size() > inlined_capacity) {
-        // Allocation is moved as a whole, data stays in place.
-        EXPECT_TRUE(v_out.data() == old_data);
-      } else {
-        EXPECT_FALSE(v_out.data() == old_data);
-      }
-    }
-  }
-}
-
-class NotTriviallyDestructible {
- public:
-  NotTriviallyDestructible() : p_(new int(1)) {}
-  explicit NotTriviallyDestructible(int i) : p_(new int(i)) {}
-
-  NotTriviallyDestructible(const NotTriviallyDestructible& other)
-      : p_(new int(*other.p_)) {}
-
-  NotTriviallyDestructible& operator=(const NotTriviallyDestructible& other) {
-    p_ = absl::make_unique<int>(*other.p_);
-    return *this;
-  }
-
-  bool operator==(const NotTriviallyDestructible& other) const {
-    return *p_ == *other.p_;
-  }
-
- private:
-  std::unique_ptr<int> p_;
-};
-
-TEST(AliasingTest, Emplace) {
-  for (int i = 2; i < 20; ++i) {
-    absl::InlinedVector<NotTriviallyDestructible, 10> vec;
-    for (int j = 0; j < i; ++j) {
-      vec.push_back(NotTriviallyDestructible(j));
-    }
-    vec.emplace(vec.begin(), vec[0]);
-    EXPECT_EQ(vec[0], vec[1]);
-    vec.emplace(vec.begin() + i / 2, vec[i / 2]);
-    EXPECT_EQ(vec[i / 2], vec[i / 2 + 1]);
-    vec.emplace(vec.end() - 1, vec.back());
-    EXPECT_EQ(vec[vec.size() - 2], vec.back());
-  }
-}
-
-TEST(AliasingTest, InsertWithCount) {
-  for (int i = 1; i < 20; ++i) {
-    absl::InlinedVector<NotTriviallyDestructible, 10> vec;
-    for (int j = 0; j < i; ++j) {
-      vec.push_back(NotTriviallyDestructible(j));
-    }
-    for (int n = 0; n < 5; ++n) {
-      // We use back where we can because it's guaranteed to become invalidated
-      vec.insert(vec.begin(), n, vec.back());
-      auto b = vec.begin();
-      EXPECT_TRUE(
-          std::all_of(b, b + n, [&vec](const NotTriviallyDestructible& x) {
-            return x == vec.back();
-          }));
-
-      auto m_idx = vec.size() / 2;
-      vec.insert(vec.begin() + m_idx, n, vec.back());
-      auto m = vec.begin() + m_idx;
-      EXPECT_TRUE(
-          std::all_of(m, m + n, [&vec](const NotTriviallyDestructible& x) {
-            return x == vec.back();
-          }));
-
-      // We want distinct values so the equality test is meaningful,
-      // vec[vec.size() - 1] is also almost always invalidated.
-      auto old_e = vec.size() - 1;
-      auto val = vec[old_e];
-      vec.insert(vec.end(), n, vec[old_e]);
-      auto e = vec.begin() + old_e;
-      EXPECT_TRUE(std::all_of(
-          e, e + n,
-          [&val](const NotTriviallyDestructible& x) { return x == val; }));
-    }
-  }
-}
-
-TEST(OverheadTest, Storage) {
-  // Check for size overhead.
-  // In particular, ensure that std::allocator doesn't cost anything to store.
-  // The union should be absorbing some of the allocation bookkeeping overhead
-  // in the larger vectors, leaving only the size_ field as overhead.
-
-  struct T { void* val; };
-  size_t expected_overhead = sizeof(T);
-
-  EXPECT_EQ((2 * expected_overhead),
-            sizeof(absl::InlinedVector<T, 1>) - sizeof(T[1]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 2>) - sizeof(T[2]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 3>) - sizeof(T[3]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 4>) - sizeof(T[4]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 5>) - sizeof(T[5]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 6>) - sizeof(T[6]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 7>) - sizeof(T[7]));
-  EXPECT_EQ(expected_overhead,
-            sizeof(absl::InlinedVector<T, 8>) - sizeof(T[8]));
-}
-
-TEST(IntVec, Clear) {
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    IntVec v;
-    Fill(&v, len);
-    v.clear();
-    EXPECT_EQ(0, v.size());
-    EXPECT_EQ(v.begin(), v.end());
-  }
-}
-
-TEST(IntVec, Reserve) {
-  for (int len = 0; len < 20; len++) {
-    IntVec v;
-    Fill(&v, len);
-
-    for (int newlen = 0; newlen < 100; newlen++) {
-      const int* start_rep = v.data();
-      v.reserve(newlen);
-      const int* final_rep = v.data();
-      if (newlen <= len) {
-        EXPECT_EQ(start_rep, final_rep);
-      }
-      EXPECT_LE(newlen, v.capacity());
-
-      // Filling up to newlen should not change rep
-      while (v.size() < newlen) {
-        v.push_back(0);
-      }
-      EXPECT_EQ(final_rep, v.data());
-    }
-  }
-}
-
-TEST(StringVec, SelfRefPushBack) {
-  std::vector<std::string> std_v;
-  absl::InlinedVector<std::string, 4> v;
-  const std::string s = "A quite long string to ensure heap.";
-  std_v.push_back(s);
-  v.push_back(s);
-  for (int i = 0; i < 20; ++i) {
-    EXPECT_THAT(v, ElementsAreArray(std_v));
-
-    v.push_back(v.back());
-    std_v.push_back(std_v.back());
-  }
-  EXPECT_THAT(v, ElementsAreArray(std_v));
-}
-
-TEST(StringVec, SelfRefPushBackWithMove) {
-  std::vector<std::string> std_v;
-  absl::InlinedVector<std::string, 4> v;
-  const std::string s = "A quite long string to ensure heap.";
-  std_v.push_back(s);
-  v.push_back(s);
-  for (int i = 0; i < 20; ++i) {
-    EXPECT_EQ(v.back(), std_v.back());
-
-    v.push_back(std::move(v.back()));
-    std_v.push_back(std::move(std_v.back()));
-  }
-  EXPECT_EQ(v.back(), std_v.back());
-}
-
-TEST(StringVec, SelfMove) {
-  const std::string s = "A quite long string to ensure heap.";
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    absl::InlinedVector<std::string, 8> v;
-    for (int i = 0; i < len; ++i) {
-      SCOPED_TRACE(i);
-      v.push_back(s);
-    }
-    // Indirection necessary to avoid compiler warning.
-    v = std::move(*(&v));
-    // Ensure that the inlined vector is still in a valid state by copying it.
-    // We don't expect specific contents since a self-move results in an
-    // unspecified valid state.
-    std::vector<std::string> copy(v.begin(), v.end());
-  }
-}
-
-TEST(IntVec, Swap) {
-  for (int l1 = 0; l1 < 20; l1++) {
-    SCOPED_TRACE(l1);
-    for (int l2 = 0; l2 < 20; l2++) {
-      SCOPED_TRACE(l2);
-      IntVec a = Fill(l1, 0);
-      IntVec b = Fill(l2, 100);
-      {
-        using std::swap;
-        swap(a, b);
-      }
-      EXPECT_EQ(l1, b.size());
-      EXPECT_EQ(l2, a.size());
-      for (int i = 0; i < l1; i++) {
-        SCOPED_TRACE(i);
-        EXPECT_EQ(i, b[i]);
-      }
-      for (int i = 0; i < l2; i++) {
-        SCOPED_TRACE(i);
-        EXPECT_EQ(100 + i, a[i]);
-      }
-    }
-  }
-}
-
-TYPED_TEST_P(InstanceTest, Swap) {
-  using Instance = TypeParam;
-  using InstanceVec = absl::InlinedVector<Instance, 8>;
-  for (int l1 = 0; l1 < 20; l1++) {
-    SCOPED_TRACE(l1);
-    for (int l2 = 0; l2 < 20; l2++) {
-      SCOPED_TRACE(l2);
-      InstanceTracker tracker;
-      InstanceVec a, b;
-      const size_t inlined_capacity = a.capacity();
-      auto min_len = std::min(l1, l2);
-      auto max_len = std::max(l1, l2);
-      for (int i = 0; i < l1; i++) a.push_back(Instance(i));
-      for (int i = 0; i < l2; i++) b.push_back(Instance(100 + i));
-      EXPECT_EQ(tracker.instances(), l1 + l2);
-      tracker.ResetCopiesMovesSwaps();
-      {
-        using std::swap;
-        swap(a, b);
-      }
-      EXPECT_EQ(tracker.instances(), l1 + l2);
-      if (a.size() > inlined_capacity && b.size() > inlined_capacity) {
-        EXPECT_EQ(tracker.swaps(), 0);  // Allocations are swapped.
-        EXPECT_EQ(tracker.moves(), 0);
-      } else if (a.size() <= inlined_capacity && b.size() <= inlined_capacity) {
-        EXPECT_EQ(tracker.swaps(), min_len);
-        EXPECT_EQ((tracker.moves() ? tracker.moves() : tracker.copies()),
-                  max_len - min_len);
-      } else {
-        // One is allocated and the other isn't. The allocation is transferred
-        // without copying elements, and the inlined instances are copied/moved.
-        EXPECT_EQ(tracker.swaps(), 0);
-        EXPECT_EQ((tracker.moves() ? tracker.moves() : tracker.copies()),
-                  min_len);
-      }
-
-      EXPECT_EQ(l1, b.size());
-      EXPECT_EQ(l2, a.size());
-      for (int i = 0; i < l1; i++) {
-        EXPECT_EQ(i, b[i].value());
-      }
-      for (int i = 0; i < l2; i++) {
-        EXPECT_EQ(100 + i, a[i].value());
-      }
-    }
-  }
-}
-
-TEST(IntVec, EqualAndNotEqual) {
-  IntVec a, b;
-  EXPECT_TRUE(a == b);
-  EXPECT_FALSE(a != b);
-
-  a.push_back(3);
-  EXPECT_FALSE(a == b);
-  EXPECT_TRUE(a != b);
-
-  b.push_back(3);
-  EXPECT_TRUE(a == b);
-  EXPECT_FALSE(a != b);
-
-  b.push_back(7);
-  EXPECT_FALSE(a == b);
-  EXPECT_TRUE(a != b);
-
-  a.push_back(6);
-  EXPECT_FALSE(a == b);
-  EXPECT_TRUE(a != b);
-
-  a.clear();
-  b.clear();
-  for (int i = 0; i < 100; i++) {
-    a.push_back(i);
-    b.push_back(i);
-    EXPECT_TRUE(a == b);
-    EXPECT_FALSE(a != b);
-
-    b[i] = b[i] + 1;
-    EXPECT_FALSE(a == b);
-    EXPECT_TRUE(a != b);
-
-    b[i] = b[i] - 1;  // Back to before
-    EXPECT_TRUE(a == b);
-    EXPECT_FALSE(a != b);
-  }
-}
-
-TEST(IntVec, RelationalOps) {
-  IntVec a, b;
-  EXPECT_FALSE(a < b);
-  EXPECT_FALSE(b < a);
-  EXPECT_FALSE(a > b);
-  EXPECT_FALSE(b > a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_TRUE(b <= a);
-  EXPECT_TRUE(a >= b);
-  EXPECT_TRUE(b >= a);
-  b.push_back(3);
-  EXPECT_TRUE(a < b);
-  EXPECT_FALSE(b < a);
-  EXPECT_FALSE(a > b);
-  EXPECT_TRUE(b > a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_FALSE(b <= a);
-  EXPECT_FALSE(a >= b);
-  EXPECT_TRUE(b >= a);
-}
-
-TYPED_TEST_P(InstanceTest, CountConstructorsDestructors) {
-  using Instance = TypeParam;
-  using InstanceVec = absl::InlinedVector<Instance, 8>;
-  InstanceTracker tracker;
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    tracker.ResetCopiesMovesSwaps();
-
-    InstanceVec v;
-    const size_t inlined_capacity = v.capacity();
-    for (int i = 0; i < len; i++) {
-      v.push_back(Instance(i));
-    }
-    EXPECT_EQ(tracker.instances(), len);
-    EXPECT_GE(tracker.copies() + tracker.moves(),
-              len);  // More due to reallocation.
-    tracker.ResetCopiesMovesSwaps();
-
-    // Enlarging resize() must construct some objects
-    tracker.ResetCopiesMovesSwaps();
-    v.resize(len + 10, Instance(100));
-    EXPECT_EQ(tracker.instances(), len + 10);
-    if (len <= inlined_capacity && len + 10 > inlined_capacity) {
-      EXPECT_EQ(tracker.copies() + tracker.moves(), 10 + len);
-    } else {
-      // Only specify a minimum number of copies + moves. We don't want to
-      // depend on the reallocation policy here.
-      EXPECT_GE(tracker.copies() + tracker.moves(),
-                10);  // More due to reallocation.
-    }
-
-    // Shrinking resize() must destroy some objects
-    tracker.ResetCopiesMovesSwaps();
-    v.resize(len, Instance(100));
-    EXPECT_EQ(tracker.instances(), len);
-    EXPECT_EQ(tracker.copies(), 0);
-    EXPECT_EQ(tracker.moves(), 0);
-
-    // reserve() must not increase the number of initialized objects
-    SCOPED_TRACE("reserve");
-    v.reserve(len + 1000);
-    EXPECT_EQ(tracker.instances(), len);
-    EXPECT_EQ(tracker.copies() + tracker.moves(), len);
-
-    // pop_back() and erase() must destroy one object
-    if (len > 0) {
-      tracker.ResetCopiesMovesSwaps();
-      v.pop_back();
-      EXPECT_EQ(tracker.instances(), len - 1);
-      EXPECT_EQ(tracker.copies(), 0);
-      EXPECT_EQ(tracker.moves(), 0);
-
-      if (!v.empty()) {
-        tracker.ResetCopiesMovesSwaps();
-        v.erase(v.begin());
-        EXPECT_EQ(tracker.instances(), len - 2);
-        EXPECT_EQ(tracker.copies() + tracker.moves(), len - 2);
-      }
-    }
-
-    tracker.ResetCopiesMovesSwaps();
-    int instances_before_empty_erase = tracker.instances();
-    v.erase(v.begin(), v.begin());
-    EXPECT_EQ(tracker.instances(), instances_before_empty_erase);
-    EXPECT_EQ(tracker.copies() + tracker.moves(), 0);
-  }
-}
-
-TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnCopyConstruction) {
-  using Instance = TypeParam;
-  using InstanceVec = absl::InlinedVector<Instance, 8>;
-  InstanceTracker tracker;
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    tracker.ResetCopiesMovesSwaps();
-
-    InstanceVec v;
-    for (int i = 0; i < len; i++) {
-      v.push_back(Instance(i));
-    }
-    EXPECT_EQ(tracker.instances(), len);
-    EXPECT_GE(tracker.copies() + tracker.moves(),
-              len);  // More due to reallocation.
-    tracker.ResetCopiesMovesSwaps();
-    {  // Copy constructor should create 'len' more instances.
-      InstanceVec v_copy(v);
-      EXPECT_EQ(tracker.instances(), len + len);
-      EXPECT_EQ(tracker.copies(), len);
-      EXPECT_EQ(tracker.moves(), 0);
-    }
-    EXPECT_EQ(tracker.instances(), len);
-  }
-}
-
-TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnMoveConstruction) {
-  using Instance = TypeParam;
-  using InstanceVec = absl::InlinedVector<Instance, 8>;
-  InstanceTracker tracker;
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    tracker.ResetCopiesMovesSwaps();
-
-    InstanceVec v;
-    const size_t inlined_capacity = v.capacity();
-    for (int i = 0; i < len; i++) {
-      v.push_back(Instance(i));
-    }
-    EXPECT_EQ(tracker.instances(), len);
-    EXPECT_GE(tracker.copies() + tracker.moves(),
-              len);  // More due to reallocation.
-    tracker.ResetCopiesMovesSwaps();
-    {
-      InstanceVec v_copy(std::move(v));
-      if (len > inlined_capacity) {
-        // Allocation is moved as a whole.
-        EXPECT_EQ(tracker.instances(), len);
-        EXPECT_EQ(tracker.live_instances(), len);
-        // Tests an implementation detail, don't rely on this in your code.
-        EXPECT_EQ(v.size(), 0);  // NOLINT misc-use-after-move
-        EXPECT_EQ(tracker.copies(), 0);
-        EXPECT_EQ(tracker.moves(), 0);
-      } else {
-        EXPECT_EQ(tracker.instances(), len + len);
-        if (Instance::supports_move()) {
-          EXPECT_EQ(tracker.live_instances(), len);
-          EXPECT_EQ(tracker.copies(), 0);
-          EXPECT_EQ(tracker.moves(), len);
-        } else {
-          EXPECT_EQ(tracker.live_instances(), len + len);
-          EXPECT_EQ(tracker.copies(), len);
-          EXPECT_EQ(tracker.moves(), 0);
-        }
-      }
-      EXPECT_EQ(tracker.swaps(), 0);
-    }
-  }
-}
-
-TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnAssignment) {
-  using Instance = TypeParam;
-  using InstanceVec = absl::InlinedVector<Instance, 8>;
-  InstanceTracker tracker;
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    for (int longorshort = 0; longorshort <= 1; ++longorshort) {
-      SCOPED_TRACE(longorshort);
-      tracker.ResetCopiesMovesSwaps();
-
-      InstanceVec longer, shorter;
-      for (int i = 0; i < len; i++) {
-        longer.push_back(Instance(i));
-        shorter.push_back(Instance(i));
-      }
-      longer.push_back(Instance(len));
-      EXPECT_EQ(tracker.instances(), len + len + 1);
-      EXPECT_GE(tracker.copies() + tracker.moves(),
-                len + len + 1);  // More due to reallocation.
-
-      tracker.ResetCopiesMovesSwaps();
-      if (longorshort) {
-        shorter = longer;
-        EXPECT_EQ(tracker.instances(), (len + 1) + (len + 1));
-        EXPECT_GE(tracker.copies() + tracker.moves(),
-                  len + 1);  // More due to reallocation.
-      } else {
-        longer = shorter;
-        EXPECT_EQ(tracker.instances(), len + len);
-        EXPECT_EQ(tracker.copies() + tracker.moves(), len);
-      }
-    }
-  }
-}
-
-TYPED_TEST_P(InstanceTest, CountConstructorsDestructorsOnMoveAssignment) {
-  using Instance = TypeParam;
-  using InstanceVec = absl::InlinedVector<Instance, 8>;
-  InstanceTracker tracker;
-  for (int len = 0; len < 20; len++) {
-    SCOPED_TRACE(len);
-    for (int longorshort = 0; longorshort <= 1; ++longorshort) {
-      SCOPED_TRACE(longorshort);
-      tracker.ResetCopiesMovesSwaps();
-
-      InstanceVec longer, shorter;
-      const int inlined_capacity = longer.capacity();
-      for (int i = 0; i < len; i++) {
-        longer.push_back(Instance(i));
-        shorter.push_back(Instance(i));
-      }
-      longer.push_back(Instance(len));
-      EXPECT_EQ(tracker.instances(), len + len + 1);
-      EXPECT_GE(tracker.copies() + tracker.moves(),
-                len + len + 1);  // More due to reallocation.
-
-      tracker.ResetCopiesMovesSwaps();
-      int src_len;
-      if (longorshort) {
-        src_len = len + 1;
-        shorter = std::move(longer);
-      } else {
-        src_len = len;
-        longer = std::move(shorter);
-      }
-      if (src_len > inlined_capacity) {
-        // Allocation moved as a whole.
-        EXPECT_EQ(tracker.instances(), src_len);
-        EXPECT_EQ(tracker.live_instances(), src_len);
-        EXPECT_EQ(tracker.copies(), 0);
-        EXPECT_EQ(tracker.moves(), 0);
-      } else {
-        // Elements are all copied.
-        EXPECT_EQ(tracker.instances(), src_len + src_len);
-        if (Instance::supports_move()) {
-          EXPECT_EQ(tracker.copies(), 0);
-          EXPECT_EQ(tracker.moves(), src_len);
-          EXPECT_EQ(tracker.live_instances(), src_len);
-        } else {
-          EXPECT_EQ(tracker.copies(), src_len);
-          EXPECT_EQ(tracker.moves(), 0);
-          EXPECT_EQ(tracker.live_instances(), src_len + src_len);
-        }
-      }
-      EXPECT_EQ(tracker.swaps(), 0);
-    }
-  }
-}
-
-TEST(CountElemAssign, SimpleTypeWithInlineBacking) {
-  for (size_t original_size = 0; original_size <= 5; ++original_size) {
-    SCOPED_TRACE(original_size);
-    // Original contents are [12345, 12345, ...]
-    std::vector<int> original_contents(original_size, 12345);
-
-    absl::InlinedVector<int, 2> v(original_contents.begin(),
-                                  original_contents.end());
-    v.assign(2, 123);
-    EXPECT_THAT(v, AllOf(SizeIs(2), ElementsAre(123, 123)));
-    if (original_size <= 2) {
-      // If the original had inline backing, it should stay inline.
-      EXPECT_EQ(2, v.capacity());
-    }
-  }
-}
-
-TEST(CountElemAssign, SimpleTypeWithAllocation) {
-  for (size_t original_size = 0; original_size <= 5; ++original_size) {
-    SCOPED_TRACE(original_size);
-    // Original contents are [12345, 12345, ...]
-    std::vector<int> original_contents(original_size, 12345);
-
-    absl::InlinedVector<int, 2> v(original_contents.begin(),
-                                  original_contents.end());
-    v.assign(3, 123);
-    EXPECT_THAT(v, AllOf(SizeIs(3), ElementsAre(123, 123, 123)));
-    EXPECT_LE(v.size(), v.capacity());
-  }
-}
-
-TYPED_TEST_P(InstanceTest, CountElemAssignInlineBacking) {
-  using Instance = TypeParam;
-  for (size_t original_size = 0; original_size <= 5; ++original_size) {
-    SCOPED_TRACE(original_size);
-    // Original contents are [12345, 12345, ...]
-    std::vector<Instance> original_contents(original_size, Instance(12345));
-
-    absl::InlinedVector<Instance, 2> v(original_contents.begin(),
-                                       original_contents.end());
-    v.assign(2, Instance(123));
-    EXPECT_THAT(v, AllOf(SizeIs(2), ElementsAre(ValueIs(123), ValueIs(123))));
-    if (original_size <= 2) {
-      // If the original had inline backing, it should stay inline.
-      EXPECT_EQ(2, v.capacity());
-    }
-  }
-}
-
-template <typename Instance>
-void InstanceCountElemAssignWithAllocationTest() {
-  for (size_t original_size = 0; original_size <= 5; ++original_size) {
-    SCOPED_TRACE(original_size);
-    // Original contents are [12345, 12345, ...]
-    std::vector<Instance> original_contents(original_size, Instance(12345));
-
-    absl::InlinedVector<Instance, 2> v(original_contents.begin(),
-                                       original_contents.end());
-    v.assign(3, Instance(123));
-    EXPECT_THAT(v, AllOf(SizeIs(3), ElementsAre(ValueIs(123), ValueIs(123),
-                                                ValueIs(123))));
-    EXPECT_LE(v.size(), v.capacity());
-  }
-}
-TEST(CountElemAssign, WithAllocationCopyableInstance) {
-  InstanceCountElemAssignWithAllocationTest<CopyableOnlyInstance>();
-}
-TEST(CountElemAssign, WithAllocationCopyableMovableInstance) {
-  InstanceCountElemAssignWithAllocationTest<CopyableMovableInstance>();
-}
-
-TEST(RangedConstructor, SimpleType) {
-  std::vector<int> source_v = {4, 5, 6};
-  // First try to fit in inline backing
-  absl::InlinedVector<int, 4> v(source_v.begin(), source_v.end());
-  EXPECT_EQ(3, v.size());
-  EXPECT_EQ(4, v.capacity());  // Indication that we're still on inlined storage
-  EXPECT_EQ(4, v[0]);
-  EXPECT_EQ(5, v[1]);
-  EXPECT_EQ(6, v[2]);
-
-  // Now, force a re-allocate
-  absl::InlinedVector<int, 2> realloc_v(source_v.begin(), source_v.end());
-  EXPECT_EQ(3, realloc_v.size());
-  EXPECT_LT(2, realloc_v.capacity());
-  EXPECT_EQ(4, realloc_v[0]);
-  EXPECT_EQ(5, realloc_v[1]);
-  EXPECT_EQ(6, realloc_v[2]);
-}
-
-// Test for ranged constructors using Instance as the element type and
-// SourceContainer as the source container type.
-template <typename Instance, typename SourceContainer, int inlined_capacity>
-void InstanceRangedConstructorTestForContainer() {
-  InstanceTracker tracker;
-  SourceContainer source_v = {Instance(0), Instance(1)};
-  tracker.ResetCopiesMovesSwaps();
-  absl::InlinedVector<Instance, inlined_capacity> v(source_v.begin(),
-                                                    source_v.end());
-  EXPECT_EQ(2, v.size());
-  EXPECT_LT(1, v.capacity());
-  EXPECT_EQ(0, v[0].value());
-  EXPECT_EQ(1, v[1].value());
-  EXPECT_EQ(tracker.copies(), 2);
-  EXPECT_EQ(tracker.moves(), 0);
-}
-
-template <typename Instance, int inlined_capacity>
-void InstanceRangedConstructorTestWithCapacity() {
-  // Test with const and non-const, random access and non-random-access sources.
-  // TODO(bsamwel): Test with an input iterator source.
-  {
-    SCOPED_TRACE("std::list");
-    InstanceRangedConstructorTestForContainer<Instance, std::list<Instance>,
-                                              inlined_capacity>();
-    {
-      SCOPED_TRACE("const std::list");
-      InstanceRangedConstructorTestForContainer<
-          Instance, const std::list<Instance>, inlined_capacity>();
-    }
-    {
-      SCOPED_TRACE("std::vector");
-      InstanceRangedConstructorTestForContainer<Instance, std::vector<Instance>,
-                                                inlined_capacity>();
-    }
-    {
-      SCOPED_TRACE("const std::vector");
-      InstanceRangedConstructorTestForContainer<
-          Instance, const std::vector<Instance>, inlined_capacity>();
-    }
-  }
-}
-
-TYPED_TEST_P(InstanceTest, RangedConstructor) {
-  using Instance = TypeParam;
-  SCOPED_TRACE("capacity=1");
-  InstanceRangedConstructorTestWithCapacity<Instance, 1>();
-  SCOPED_TRACE("capacity=2");
-  InstanceRangedConstructorTestWithCapacity<Instance, 2>();
-}
-
-TEST(RangedConstructor, ElementsAreConstructed) {
-  std::vector<std::string> source_v = {"cat", "dog"};
-
-  // Force expansion and re-allocation of v.  Ensures that when the vector is
-  // expanded that new elements are constructed.
-  absl::InlinedVector<std::string, 1> v(source_v.begin(), source_v.end());
-  EXPECT_EQ("cat", v[0]);
-  EXPECT_EQ("dog", v[1]);
-}
-
-TEST(RangedAssign, SimpleType) {
-  // Test for all combinations of original sizes (empty and non-empty inline,
-  // and out of line) and target sizes.
-  for (size_t original_size = 0; original_size <= 5; ++original_size) {
-    SCOPED_TRACE(original_size);
-    // Original contents are [12345, 12345, ...]
-    std::vector<int> original_contents(original_size, 12345);
-
-    for (size_t target_size = 0; target_size <= 5; ++target_size) {
-      SCOPED_TRACE(target_size);
-
-      // New contents are [3, 4, ...]
-      std::vector<int> new_contents;
-      for (size_t i = 0; i < target_size; ++i) {
-        new_contents.push_back(i + 3);
-      }
-
-      absl::InlinedVector<int, 3> v(original_contents.begin(),
-                                    original_contents.end());
-      v.assign(new_contents.begin(), new_contents.end());
-
-      EXPECT_EQ(new_contents.size(), v.size());
-      EXPECT_LE(new_contents.size(), v.capacity());
-      if (target_size <= 3 && original_size <= 3) {
-        // Storage should stay inline when target size is small.
-        EXPECT_EQ(3, v.capacity());
-      }
-      EXPECT_THAT(v, ElementsAreArray(new_contents));
-    }
-  }
-}
-
-// Returns true if lhs and rhs have the same value.
-template <typename Instance>
-static bool InstanceValuesEqual(const Instance& lhs, const Instance& rhs) {
-  return lhs.value() == rhs.value();
-}
-
-// Test for ranged assign() using Instance as the element type and
-// SourceContainer as the source container type.
-template <typename Instance, typename SourceContainer>
-void InstanceRangedAssignTestForContainer() {
-  // Test for all combinations of original sizes (empty and non-empty inline,
-  // and out of line) and target sizes.
-  for (size_t original_size = 0; original_size <= 5; ++original_size) {
-    SCOPED_TRACE(original_size);
-    // Original contents are [12345, 12345, ...]
-    std::vector<Instance> original_contents(original_size, Instance(12345));
-
-    for (size_t target_size = 0; target_size <= 5; ++target_size) {
-      SCOPED_TRACE(target_size);
-
-      // New contents are [3, 4, ...]
-      // Generate data using a non-const container, because SourceContainer
-      // itself may be const.
-      // TODO(bsamwel): Test with an input iterator.
-      std::vector<Instance> new_contents_in;
-      for (size_t i = 0; i < target_size; ++i) {
-        new_contents_in.push_back(Instance(i + 3));
-      }
-      SourceContainer new_contents(new_contents_in.begin(),
-                                   new_contents_in.end());
-
-      absl::InlinedVector<Instance, 3> v(original_contents.begin(),
-                                         original_contents.end());
-      v.assign(new_contents.begin(), new_contents.end());
-
-      EXPECT_EQ(new_contents.size(), v.size());
-      EXPECT_LE(new_contents.size(), v.capacity());
-      if (target_size <= 3 && original_size <= 3) {
-        // Storage should stay inline when target size is small.
-        EXPECT_EQ(3, v.capacity());
-      }
-      EXPECT_TRUE(std::equal(v.begin(), v.end(), new_contents.begin(),
-                             InstanceValuesEqual<Instance>));
-    }
-  }
-}
-
-TYPED_TEST_P(InstanceTest, RangedAssign) {
-  using Instance = TypeParam;
-  // Test with const and non-const, random access and non-random-access sources.
-  // TODO(bsamwel): Test with an input iterator source.
-  SCOPED_TRACE("std::list");
-  InstanceRangedAssignTestForContainer<Instance, std::list<Instance>>();
-  SCOPED_TRACE("const std::list");
-  InstanceRangedAssignTestForContainer<Instance, const std::list<Instance>>();
-  SCOPED_TRACE("std::vector");
-  InstanceRangedAssignTestForContainer<Instance, std::vector<Instance>>();
-  SCOPED_TRACE("const std::vector");
-  InstanceRangedAssignTestForContainer<Instance, const std::vector<Instance>>();
-}
-
-TEST(InitializerListConstructor, SimpleTypeWithInlineBacking) {
-  EXPECT_THAT((absl::InlinedVector<int, 4>{4, 5, 6}),
-              AllOf(SizeIs(3), CapacityIs(4), ElementsAre(4, 5, 6)));
-}
-
-TEST(InitializerListConstructor, SimpleTypeWithReallocationRequired) {
-  EXPECT_THAT((absl::InlinedVector<int, 2>{4, 5, 6}),
-              AllOf(SizeIs(3), CapacityIs(Gt(2)), ElementsAre(4, 5, 6)));
-}
-
-TEST(InitializerListConstructor, DisparateTypesInList) {
-  EXPECT_THAT((absl::InlinedVector<int, 2>{-7, 8ULL}), ElementsAre(-7, 8));
-
-  EXPECT_THAT((absl::InlinedVector<std::string, 2>{"foo", std::string("bar")}),
-              ElementsAre("foo", "bar"));
-}
-
-TEST(InitializerListConstructor, ComplexTypeWithInlineBacking) {
-  EXPECT_THAT((absl::InlinedVector<CopyableMovableInstance, 1>{
-                  CopyableMovableInstance(0)}),
-              AllOf(SizeIs(1), CapacityIs(1), ElementsAre(ValueIs(0))));
-}
-
-TEST(InitializerListConstructor, ComplexTypeWithReallocationRequired) {
-  EXPECT_THAT(
-      (absl::InlinedVector<CopyableMovableInstance, 1>{
-          CopyableMovableInstance(0), CopyableMovableInstance(1)}),
-      AllOf(SizeIs(2), CapacityIs(Gt(1)), ElementsAre(ValueIs(0), ValueIs(1))));
-}
-
-TEST(InitializerListAssign, SimpleTypeFitsInlineBacking) {
-  for (size_t original_size = 0; original_size <= 4; ++original_size) {
-    SCOPED_TRACE(original_size);
-
-    absl::InlinedVector<int, 2> v1(original_size, 12345);
-    const size_t original_capacity_v1 = v1.capacity();
-    v1.assign({3});
-    EXPECT_THAT(
-        v1, AllOf(SizeIs(1), CapacityIs(original_capacity_v1), ElementsAre(3)));
-
-    absl::InlinedVector<int, 2> v2(original_size, 12345);
-    const size_t original_capacity_v2 = v2.capacity();
-    v2 = {3};
-    EXPECT_THAT(
-        v2, AllOf(SizeIs(1), CapacityIs(original_capacity_v2), ElementsAre(3)));
-  }
-}
-
-TEST(InitializerListAssign, SimpleTypeDoesNotFitInlineBacking) {
-  for (size_t original_size = 0; original_size <= 4; ++original_size) {
-    SCOPED_TRACE(original_size);
-    absl::InlinedVector<int, 2> v1(original_size, 12345);
-    v1.assign({3, 4, 5});
-    EXPECT_THAT(v1, AllOf(SizeIs(3), ElementsAre(3, 4, 5)));
-    EXPECT_LE(3, v1.capacity());
-
-    absl::InlinedVector<int, 2> v2(original_size, 12345);
-    v2 = {3, 4, 5};
-    EXPECT_THAT(v2, AllOf(SizeIs(3), ElementsAre(3, 4, 5)));
-    EXPECT_LE(3, v2.capacity());
-  }
-}
-
-TEST(InitializerListAssign, DisparateTypesInList) {
-  absl::InlinedVector<int, 2> v_int1;
-  v_int1.assign({-7, 8ULL});
-  EXPECT_THAT(v_int1, ElementsAre(-7, 8));
-
-  absl::InlinedVector<int, 2> v_int2;
-  v_int2 = {-7, 8ULL};
-  EXPECT_THAT(v_int2, ElementsAre(-7, 8));
-
-  absl::InlinedVector<std::string, 2> v_string1;
-  v_string1.assign({"foo", std::string("bar")});
-  EXPECT_THAT(v_string1, ElementsAre("foo", "bar"));
-
-  absl::InlinedVector<std::string, 2> v_string2;
-  v_string2 = {"foo", std::string("bar")};
-  EXPECT_THAT(v_string2, ElementsAre("foo", "bar"));
-}
-
-TYPED_TEST_P(InstanceTest, InitializerListAssign) {
-  using Instance = TypeParam;
-  for (size_t original_size = 0; original_size <= 4; ++original_size) {
-    SCOPED_TRACE(original_size);
-    absl::InlinedVector<Instance, 2> v(original_size, Instance(12345));
-    const size_t original_capacity = v.capacity();
-    v.assign({Instance(3)});
-    EXPECT_THAT(v, AllOf(SizeIs(1), CapacityIs(original_capacity),
-                         ElementsAre(ValueIs(3))));
-  }
-  for (size_t original_size = 0; original_size <= 4; ++original_size) {
-    SCOPED_TRACE(original_size);
-    absl::InlinedVector<Instance, 2> v(original_size, Instance(12345));
-    v.assign({Instance(3), Instance(4), Instance(5)});
-    EXPECT_THAT(
-        v, AllOf(SizeIs(3), ElementsAre(ValueIs(3), ValueIs(4), ValueIs(5))));
-    EXPECT_LE(3, v.capacity());
-  }
-}
-
-REGISTER_TYPED_TEST_CASE_P(InstanceTest, Swap, CountConstructorsDestructors,
-                           CountConstructorsDestructorsOnCopyConstruction,
-                           CountConstructorsDestructorsOnMoveConstruction,
-                           CountConstructorsDestructorsOnAssignment,
-                           CountConstructorsDestructorsOnMoveAssignment,
-                           CountElemAssignInlineBacking, RangedConstructor,
-                           RangedAssign, InitializerListAssign);
-
-using InstanceTypes =
-    ::testing::Types<CopyableOnlyInstance, CopyableMovableInstance>;
-INSTANTIATE_TYPED_TEST_CASE_P(InstanceTestOnTypes, InstanceTest, InstanceTypes);
-
-TEST(DynamicVec, DynamicVecCompiles) {
-  DynamicVec v;
-  (void)v;
-}
-
-TEST(AllocatorSupportTest, Constructors) {
-  using MyAlloc = CountingAllocator<int>;
-  using AllocVec = absl::InlinedVector<int, 4, MyAlloc>;
-  const int ia[] = {0, 1, 2, 3, 4, 5, 6, 7};
-  int64_t allocated = 0;
-  MyAlloc alloc(&allocated);
-  { AllocVec ABSL_ATTRIBUTE_UNUSED v; }
-  { AllocVec ABSL_ATTRIBUTE_UNUSED v(alloc); }
-  { AllocVec ABSL_ATTRIBUTE_UNUSED v(ia, ia + ABSL_ARRAYSIZE(ia), alloc); }
-  { AllocVec ABSL_ATTRIBUTE_UNUSED v({1, 2, 3}, alloc); }
-
-  AllocVec v2;
-  { AllocVec ABSL_ATTRIBUTE_UNUSED v(v2, alloc); }
-  { AllocVec ABSL_ATTRIBUTE_UNUSED v(std::move(v2), alloc); }
-}
-
-TEST(AllocatorSupportTest, CountAllocations) {
-  using MyAlloc = CountingAllocator<int>;
-  using AllocVec = absl::InlinedVector<int, 4, MyAlloc>;
-  const int ia[] = {0, 1, 2, 3, 4, 5, 6, 7};
-  int64_t allocated = 0;
-  MyAlloc alloc(&allocated);
-  {
-    AllocVec ABSL_ATTRIBUTE_UNUSED v(ia, ia + 4, alloc);
-    EXPECT_THAT(allocated, 0);
-  }
-  EXPECT_THAT(allocated, 0);
-  {
-    AllocVec ABSL_ATTRIBUTE_UNUSED v(ia, ia + ABSL_ARRAYSIZE(ia), alloc);
-    EXPECT_THAT(allocated, v.size() * sizeof(int));
-  }
-  EXPECT_THAT(allocated, 0);
-  {
-    AllocVec v(4, 1, alloc);
-    EXPECT_THAT(allocated, 0);
-
-    int64_t allocated2 = 0;
-    MyAlloc alloc2(&allocated2);
-    AllocVec v2(v, alloc2);
-    EXPECT_THAT(allocated2, 0);
-
-    int64_t allocated3 = 0;
-    MyAlloc alloc3(&allocated3);
-    AllocVec v3(std::move(v), alloc3);
-    EXPECT_THAT(allocated3, 0);
-  }
-  EXPECT_THAT(allocated, 0);
-  {
-    AllocVec v(8, 2, alloc);
-    EXPECT_THAT(allocated, v.size() * sizeof(int));
-
-    int64_t allocated2 = 0;
-    MyAlloc alloc2(&allocated2);
-    AllocVec v2(v, alloc2);
-    EXPECT_THAT(allocated2, v2.size() * sizeof(int));
-
-    int64_t allocated3 = 0;
-    MyAlloc alloc3(&allocated3);
-    AllocVec v3(std::move(v), alloc3);
-    EXPECT_THAT(allocated3, v3.size() * sizeof(int));
-  }
-  EXPECT_EQ(allocated, 0);
-  {
-    // Test shrink_to_fit deallocations.
-    AllocVec v(8, 2, alloc);
-    EXPECT_EQ(allocated, 8 * sizeof(int));
-    v.resize(5);
-    EXPECT_EQ(allocated, 8 * sizeof(int));
-    v.shrink_to_fit();
-    EXPECT_EQ(allocated, 5 * sizeof(int));
-    v.resize(4);
-    EXPECT_EQ(allocated, 5 * sizeof(int));
-    v.shrink_to_fit();
-    EXPECT_EQ(allocated, 0);
-  }
-}
-
-TEST(AllocatorSupportTest, SwapBothAllocated) {
-  using MyAlloc = CountingAllocator<int>;
-  using AllocVec = absl::InlinedVector<int, 4, MyAlloc>;
-  int64_t allocated1 = 0;
-  int64_t allocated2 = 0;
-  {
-    const int ia1[] = {0, 1, 2, 3, 4, 5, 6, 7};
-    const int ia2[] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
-    MyAlloc a1(&allocated1);
-    MyAlloc a2(&allocated2);
-    AllocVec v1(ia1, ia1 + ABSL_ARRAYSIZE(ia1), a1);
-    AllocVec v2(ia2, ia2 + ABSL_ARRAYSIZE(ia2), a2);
-    EXPECT_LT(v1.capacity(), v2.capacity());
-    EXPECT_THAT(allocated1, v1.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, v2.capacity() * sizeof(int));
-    v1.swap(v2);
-    EXPECT_THAT(v1, ElementsAreArray(ia2));
-    EXPECT_THAT(v2, ElementsAreArray(ia1));
-    EXPECT_THAT(allocated1, v2.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, v1.capacity() * sizeof(int));
-  }
-  EXPECT_THAT(allocated1, 0);
-  EXPECT_THAT(allocated2, 0);
-}
-
-TEST(AllocatorSupportTest, SwapOneAllocated) {
-  using MyAlloc = CountingAllocator<int>;
-  using AllocVec = absl::InlinedVector<int, 4, MyAlloc>;
-  int64_t allocated1 = 0;
-  int64_t allocated2 = 0;
-  {
-    const int ia1[] = {0, 1, 2, 3, 4, 5, 6, 7};
-    const int ia2[] = {0, 1, 2, 3};
-    MyAlloc a1(&allocated1);
-    MyAlloc a2(&allocated2);
-    AllocVec v1(ia1, ia1 + ABSL_ARRAYSIZE(ia1), a1);
-    AllocVec v2(ia2, ia2 + ABSL_ARRAYSIZE(ia2), a2);
-    EXPECT_THAT(allocated1, v1.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, 0);
-    v1.swap(v2);
-    EXPECT_THAT(v1, ElementsAreArray(ia2));
-    EXPECT_THAT(v2, ElementsAreArray(ia1));
-    EXPECT_THAT(allocated1, v2.capacity() * sizeof(int));
-    EXPECT_THAT(allocated2, 0);
-    EXPECT_TRUE(v2.get_allocator() == a1);
-    EXPECT_TRUE(v1.get_allocator() == a2);
-  }
-  EXPECT_THAT(allocated1, 0);
-  EXPECT_THAT(allocated2, 0);
-}
-
-TEST(AllocatorSupportTest, ScopedAllocatorWorksInlined) {
-  using StdVector = std::vector<int, CountingAllocator<int>>;
-  using Alloc = CountingAllocator<StdVector>;
-  using ScopedAlloc = std::scoped_allocator_adaptor<Alloc>;
-  using AllocVec = absl::InlinedVector<StdVector, 1, ScopedAlloc>;
-
-  int64_t total_allocated_byte_count = 0;
-
-  AllocVec inlined_case(ScopedAlloc(Alloc(+&total_allocated_byte_count)));
-
-  // Called only once to remain inlined
-  inlined_case.emplace_back();
-
-  int64_t absl_responsible_for_count = total_allocated_byte_count;
-
-  // MSVC's allocator preemptively allocates in debug mode
-#if !defined(_MSC_VER)
-  EXPECT_EQ(absl_responsible_for_count, 0);
-#endif  // !defined(_MSC_VER)
-
-  inlined_case[0].emplace_back();
-  EXPECT_GT(total_allocated_byte_count, absl_responsible_for_count);
-
-  inlined_case.clear();
-  inlined_case.shrink_to_fit();
-  EXPECT_EQ(total_allocated_byte_count, 0);
-}
-
-TEST(AllocatorSupportTest, ScopedAllocatorWorksAllocated) {
-  using StdVector = std::vector<int, CountingAllocator<int>>;
-  using Alloc = CountingAllocator<StdVector>;
-  using ScopedAlloc = std::scoped_allocator_adaptor<Alloc>;
-  using AllocVec = absl::InlinedVector<StdVector, 1, ScopedAlloc>;
-
-  int64_t total_allocated_byte_count = 0;
-
-  AllocVec allocated_case(ScopedAlloc(Alloc(+&total_allocated_byte_count)));
-
-  // Called twice to force into being allocated
-  allocated_case.emplace_back();
-  allocated_case.emplace_back();
-
-  int64_t absl_responsible_for_count = total_allocated_byte_count;
-  EXPECT_GT(absl_responsible_for_count, 0);
-
-  allocated_case[1].emplace_back();
-  EXPECT_GT(total_allocated_byte_count, absl_responsible_for_count);
-
-  allocated_case.clear();
-  allocated_case.shrink_to_fit();
-  EXPECT_EQ(total_allocated_byte_count, 0);
-}
-
-TEST(AllocatorSupportTest, SizeAllocConstructor) {
-  constexpr int inlined_size = 4;
-  using Alloc = CountingAllocator<int>;
-  using AllocVec = absl::InlinedVector<int, inlined_size, Alloc>;
-
-  {
-    auto len = inlined_size / 2;
-    int64_t allocated = 0;
-    auto v = AllocVec(len, Alloc(&allocated));
-
-    // Inline storage used; allocator should not be invoked
-    EXPECT_THAT(allocated, 0);
-    EXPECT_THAT(v, AllOf(SizeIs(len), Each(0)));
-  }
-
-  {
-    auto len = inlined_size * 2;
-    int64_t allocated = 0;
-    auto v = AllocVec(len, Alloc(&allocated));
-
-    // Out of line storage used; allocation of 8 elements expected
-    EXPECT_THAT(allocated, len * sizeof(int));
-    EXPECT_THAT(v, AllOf(SizeIs(len), Each(0)));
-  }
-}
-
-TEST(InlinedVectorTest, MinimumAllocatorCompilesUsingTraits) {
-  using T = int;
-  using A = std::allocator<T>;
-  using ATraits = absl::allocator_traits<A>;
-
-  struct MinimumAllocator {
-    using value_type = T;
-
-    value_type* allocate(size_t n) {
-      A a;
-      return ATraits::allocate(a, n);
-    }
-
-    void deallocate(value_type* p, size_t n) {
-      A a;
-      ATraits::deallocate(a, p, n);
-    }
-  };
-
-  absl::InlinedVector<T, 1, MinimumAllocator> vec;
-  vec.emplace_back();
-  vec.resize(0);
-}
-
-TEST(InlinedVectorTest, AbslHashValueWorks) {
-  using V = absl::InlinedVector<int, 4>;
-  std::vector<V> cases;
-
-  // Generate a variety of vectors some of these are small enough for the inline
-  // space but are stored out of line.
-  for (int i = 0; i < 10; ++i) {
-    V v;
-    for (int j = 0; j < i; ++j) {
-      v.push_back(j);
-    }
-    cases.push_back(v);
-    v.resize(i % 4);
-    cases.push_back(v);
-  }
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(cases));
-}
-
-}  // anonymous namespace
diff --git a/third_party/abseil/absl/container/internal/btree.h b/third_party/abseil/absl/container/internal/btree.h
deleted file mode 100644
index 6f5f01b..0000000
--- a/third_party/abseil/absl/container/internal/btree.h
+++ /dev/null
@@ -1,2613 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// A btree implementation of the STL set and map interfaces. A btree is smaller
-// and generally also faster than STL set/map (refer to the benchmarks below).
-// The red-black tree implementation of STL set/map has an overhead of 3
-// pointers (left, right and parent) plus the node color information for each
-// stored value. So a set<int32_t> consumes 40 bytes for each value stored in
-// 64-bit mode. This btree implementation stores multiple values on fixed
-// size nodes (usually 256 bytes) and doesn't store child pointers for leaf
-// nodes. The result is that a btree_set<int32_t> may use much less memory per
-// stored value. For the random insertion benchmark in btree_bench.cc, a
-// btree_set<int32_t> with node-size of 256 uses 5.1 bytes per stored value.
-//
-// The packing of multiple values on to each node of a btree has another effect
-// besides better space utilization: better cache locality due to fewer cache
-// lines being accessed. Better cache locality translates into faster
-// operations.
-//
-// CAVEATS
-//
-// Insertions and deletions on a btree can cause splitting, merging or
-// rebalancing of btree nodes. And even without these operations, insertions
-// and deletions on a btree will move values around within a node. In both
-// cases, the result is that insertions and deletions can invalidate iterators
-// pointing to values other than the one being inserted/deleted. Therefore, this
-// container does not provide pointer stability. This is notably different from
-// STL set/map which takes care to not invalidate iterators on insert/erase
-// except, of course, for iterators pointing to the value being erased.  A
-// partial workaround when erasing is available: erase() returns an iterator
-// pointing to the item just after the one that was erased (or end() if none
-// exists).
-
-#ifndef ABSL_CONTAINER_INTERNAL_BTREE_H_
-#define ABSL_CONTAINER_INTERNAL_BTREE_H_
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <cstdint>
-#include <cstring>
-#include <functional>
-#include <iterator>
-#include <limits>
-#include <new>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/macros.h"
-#include "absl/container/internal/common.h"
-#include "absl/container/internal/compressed_tuple.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/layout.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/compare.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// A helper class that indicates if the Compare parameter is a key-compare-to
-// comparator.
-template <typename Compare, typename T>
-using btree_is_key_compare_to =
-    std::is_convertible<absl::result_of_t<Compare(const T &, const T &)>,
-                        absl::weak_ordering>;
-
-struct StringBtreeDefaultLess {
-  using is_transparent = void;
-
-  StringBtreeDefaultLess() = default;
-
-  // Compatibility constructor.
-  StringBtreeDefaultLess(std::less<std::string>) {}  // NOLINT
-  StringBtreeDefaultLess(std::less<string_view>) {}  // NOLINT
-
-  absl::weak_ordering operator()(absl::string_view lhs,
-                                 absl::string_view rhs) const {
-    return compare_internal::compare_result_as_ordering(lhs.compare(rhs));
-  }
-  StringBtreeDefaultLess(std::less<absl::Cord>) {}  // NOLINT
-  absl::weak_ordering operator()(const absl::Cord &lhs,
-                                 const absl::Cord &rhs) const {
-    return compare_internal::compare_result_as_ordering(lhs.Compare(rhs));
-  }
-  absl::weak_ordering operator()(const absl::Cord &lhs,
-                                 absl::string_view rhs) const {
-    return compare_internal::compare_result_as_ordering(lhs.Compare(rhs));
-  }
-  absl::weak_ordering operator()(absl::string_view lhs,
-                                 const absl::Cord &rhs) const {
-    return compare_internal::compare_result_as_ordering(-rhs.Compare(lhs));
-  }
-};
-
-struct StringBtreeDefaultGreater {
-  using is_transparent = void;
-
-  StringBtreeDefaultGreater() = default;
-
-  StringBtreeDefaultGreater(std::greater<std::string>) {}  // NOLINT
-  StringBtreeDefaultGreater(std::greater<string_view>) {}  // NOLINT
-
-  absl::weak_ordering operator()(absl::string_view lhs,
-                                 absl::string_view rhs) const {
-    return compare_internal::compare_result_as_ordering(rhs.compare(lhs));
-  }
-  StringBtreeDefaultGreater(std::greater<absl::Cord>) {}  // NOLINT
-  absl::weak_ordering operator()(const absl::Cord &lhs,
-                                 const absl::Cord &rhs) const {
-    return compare_internal::compare_result_as_ordering(rhs.Compare(lhs));
-  }
-  absl::weak_ordering operator()(const absl::Cord &lhs,
-                                 absl::string_view rhs) const {
-    return compare_internal::compare_result_as_ordering(-lhs.Compare(rhs));
-  }
-  absl::weak_ordering operator()(absl::string_view lhs,
-                                 const absl::Cord &rhs) const {
-    return compare_internal::compare_result_as_ordering(rhs.Compare(lhs));
-  }
-};
-
-// A helper class to convert a boolean comparison into a three-way "compare-to"
-// comparison that returns an `absl::weak_ordering`. This helper
-// class is specialized for less<std::string>, greater<std::string>,
-// less<string_view>, greater<string_view>, less<absl::Cord>, and
-// greater<absl::Cord>.
-//
-// key_compare_to_adapter is provided so that btree users
-// automatically get the more efficient compare-to code when using common
-// Abseil string types with common comparison functors.
-// These string-like specializations also turn on heterogeneous lookup by
-// default.
-template <typename Compare>
-struct key_compare_to_adapter {
-  using type = Compare;
-};
-
-template <>
-struct key_compare_to_adapter<std::less<std::string>> {
-  using type = StringBtreeDefaultLess;
-};
-
-template <>
-struct key_compare_to_adapter<std::greater<std::string>> {
-  using type = StringBtreeDefaultGreater;
-};
-
-template <>
-struct key_compare_to_adapter<std::less<absl::string_view>> {
-  using type = StringBtreeDefaultLess;
-};
-
-template <>
-struct key_compare_to_adapter<std::greater<absl::string_view>> {
-  using type = StringBtreeDefaultGreater;
-};
-
-template <>
-struct key_compare_to_adapter<std::less<absl::Cord>> {
-  using type = StringBtreeDefaultLess;
-};
-
-template <>
-struct key_compare_to_adapter<std::greater<absl::Cord>> {
-  using type = StringBtreeDefaultGreater;
-};
-
-// Detects an 'absl_btree_prefer_linear_node_search' member. This is
-// a protocol used as an opt-in or opt-out of linear search.
-//
-//  For example, this would be useful for key types that wrap an integer
-//  and define their own cheap operator<(). For example:
-//
-//   class K {
-//    public:
-//     using absl_btree_prefer_linear_node_search = std::true_type;
-//     ...
-//    private:
-//     friend bool operator<(K a, K b) { return a.k_ < b.k_; }
-//     int k_;
-//   };
-//
-//   btree_map<K, V> m;  // Uses linear search
-//
-// If T has the preference tag, then it has a preference.
-// Btree will use the tag's truth value.
-template <typename T, typename = void>
-struct has_linear_node_search_preference : std::false_type {};
-template <typename T, typename = void>
-struct prefers_linear_node_search : std::false_type {};
-template <typename T>
-struct has_linear_node_search_preference<
-    T, absl::void_t<typename T::absl_btree_prefer_linear_node_search>>
-    : std::true_type {};
-template <typename T>
-struct prefers_linear_node_search<
-    T, absl::void_t<typename T::absl_btree_prefer_linear_node_search>>
-    : T::absl_btree_prefer_linear_node_search {};
-
-template <typename Key, typename Compare, typename Alloc, int TargetNodeSize,
-          bool Multi, typename SlotPolicy>
-struct common_params {
-  // If Compare is a common comparator for a string-like type, then we adapt it
-  // to use heterogeneous lookup and to be a key-compare-to comparator.
-  using key_compare = typename key_compare_to_adapter<Compare>::type;
-  // A type which indicates if we have a key-compare-to functor or a plain old
-  // key-compare functor.
-  using is_key_compare_to = btree_is_key_compare_to<key_compare, Key>;
-
-  using allocator_type = Alloc;
-  using key_type = Key;
-  using size_type = std::make_signed<size_t>::type;
-  using difference_type = ptrdiff_t;
-
-  using slot_policy = SlotPolicy;
-  using slot_type = typename slot_policy::slot_type;
-  using value_type = typename slot_policy::value_type;
-  using init_type = typename slot_policy::mutable_value_type;
-  using pointer = value_type *;
-  using const_pointer = const value_type *;
-  using reference = value_type &;
-  using const_reference = const value_type &;
-
-  // For the given lookup key type, returns whether we can have multiple
-  // equivalent keys in the btree. If this is a multi-container, then we can.
-  // Otherwise, we can have multiple equivalent keys only if all of the
-  // following conditions are met:
-  // - The comparator is transparent.
-  // - The lookup key type is not the same as key_type.
-  // - The comparator is not a StringBtreeDefault{Less,Greater} comparator
-  //   that we know has the same equivalence classes for all lookup types.
-  template <typename LookupKey>
-  constexpr static bool can_have_multiple_equivalent_keys() {
-    return Multi ||
-           (IsTransparent<key_compare>::value &&
-            !std::is_same<LookupKey, Key>::value &&
-            !std::is_same<key_compare, StringBtreeDefaultLess>::value &&
-            !std::is_same<key_compare, StringBtreeDefaultGreater>::value);
-  }
-
-  enum {
-    kTargetNodeSize = TargetNodeSize,
-
-    // Upper bound for the available space for values. This is largest for leaf
-    // nodes, which have overhead of at least a pointer + 4 bytes (for storing
-    // 3 field_types and an enum).
-    kNodeValueSpace =
-        TargetNodeSize - /*minimum overhead=*/(sizeof(void *) + 4),
-  };
-
-  // This is an integral type large enough to hold as many
-  // ValueSize-values as will fit a node of TargetNodeSize bytes.
-  using node_count_type =
-      absl::conditional_t<(kNodeValueSpace / sizeof(value_type) >
-                           (std::numeric_limits<uint8_t>::max)()),
-                          uint16_t, uint8_t>;  // NOLINT
-
-  // The following methods are necessary for passing this struct as PolicyTraits
-  // for node_handle and/or are used within btree.
-  static value_type &element(slot_type *slot) {
-    return slot_policy::element(slot);
-  }
-  static const value_type &element(const slot_type *slot) {
-    return slot_policy::element(slot);
-  }
-  template <class... Args>
-  static void construct(Alloc *alloc, slot_type *slot, Args &&... args) {
-    slot_policy::construct(alloc, slot, std::forward<Args>(args)...);
-  }
-  static void construct(Alloc *alloc, slot_type *slot, slot_type *other) {
-    slot_policy::construct(alloc, slot, other);
-  }
-  static void destroy(Alloc *alloc, slot_type *slot) {
-    slot_policy::destroy(alloc, slot);
-  }
-  static void transfer(Alloc *alloc, slot_type *new_slot, slot_type *old_slot) {
-    construct(alloc, new_slot, old_slot);
-    destroy(alloc, old_slot);
-  }
-  static void swap(Alloc *alloc, slot_type *a, slot_type *b) {
-    slot_policy::swap(alloc, a, b);
-  }
-  static void move(Alloc *alloc, slot_type *src, slot_type *dest) {
-    slot_policy::move(alloc, src, dest);
-  }
-};
-
-// A parameters structure for holding the type parameters for a btree_map.
-// Compare and Alloc should be nothrow copy-constructible.
-template <typename Key, typename Data, typename Compare, typename Alloc,
-          int TargetNodeSize, bool Multi>
-struct map_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
-                                  map_slot_policy<Key, Data>> {
-  using super_type = typename map_params::common_params;
-  using mapped_type = Data;
-  // This type allows us to move keys when it is safe to do so. It is safe
-  // for maps in which value_type and mutable_value_type are layout compatible.
-  using slot_policy = typename super_type::slot_policy;
-  using slot_type = typename super_type::slot_type;
-  using value_type = typename super_type::value_type;
-  using init_type = typename super_type::init_type;
-
-  using key_compare = typename super_type::key_compare;
-  // Inherit from key_compare for empty base class optimization.
-  struct value_compare : private key_compare {
-    value_compare() = default;
-    explicit value_compare(const key_compare &cmp) : key_compare(cmp) {}
-
-    template <typename T, typename U>
-    auto operator()(const T &left, const U &right) const
-        -> decltype(std::declval<key_compare>()(left.first, right.first)) {
-      return key_compare::operator()(left.first, right.first);
-    }
-  };
-  using is_map_container = std::true_type;
-
-  template <typename V>
-  static auto key(const V &value) -> decltype(value.first) {
-    return value.first;
-  }
-  static const Key &key(const slot_type *s) { return slot_policy::key(s); }
-  static const Key &key(slot_type *s) { return slot_policy::key(s); }
-  // For use in node handle.
-  static auto mutable_key(slot_type *s)
-      -> decltype(slot_policy::mutable_key(s)) {
-    return slot_policy::mutable_key(s);
-  }
-  static mapped_type &value(value_type *value) { return value->second; }
-};
-
-// This type implements the necessary functions from the
-// absl::container_internal::slot_type interface.
-template <typename Key>
-struct set_slot_policy {
-  using slot_type = Key;
-  using value_type = Key;
-  using mutable_value_type = Key;
-
-  static value_type &element(slot_type *slot) { return *slot; }
-  static const value_type &element(const slot_type *slot) { return *slot; }
-
-  template <typename Alloc, class... Args>
-  static void construct(Alloc *alloc, slot_type *slot, Args &&... args) {
-    absl::allocator_traits<Alloc>::construct(*alloc, slot,
-                                             std::forward<Args>(args)...);
-  }
-
-  template <typename Alloc>
-  static void construct(Alloc *alloc, slot_type *slot, slot_type *other) {
-    absl::allocator_traits<Alloc>::construct(*alloc, slot, std::move(*other));
-  }
-
-  template <typename Alloc>
-  static void destroy(Alloc *alloc, slot_type *slot) {
-    absl::allocator_traits<Alloc>::destroy(*alloc, slot);
-  }
-
-  template <typename Alloc>
-  static void swap(Alloc * /*alloc*/, slot_type *a, slot_type *b) {
-    using std::swap;
-    swap(*a, *b);
-  }
-
-  template <typename Alloc>
-  static void move(Alloc * /*alloc*/, slot_type *src, slot_type *dest) {
-    *dest = std::move(*src);
-  }
-};
-
-// A parameters structure for holding the type parameters for a btree_set.
-// Compare and Alloc should be nothrow copy-constructible.
-template <typename Key, typename Compare, typename Alloc, int TargetNodeSize,
-          bool Multi>
-struct set_params : common_params<Key, Compare, Alloc, TargetNodeSize, Multi,
-                                  set_slot_policy<Key>> {
-  using value_type = Key;
-  using slot_type = typename set_params::common_params::slot_type;
-  using value_compare = typename set_params::common_params::key_compare;
-  using is_map_container = std::false_type;
-
-  template <typename V>
-  static const V &key(const V &value) { return value; }
-  static const Key &key(const slot_type *slot) { return *slot; }
-  static const Key &key(slot_type *slot) { return *slot; }
-};
-
-// An adapter class that converts a lower-bound compare into an upper-bound
-// compare. Note: there is no need to make a version of this adapter specialized
-// for key-compare-to functors because the upper-bound (the first value greater
-// than the input) is never an exact match.
-template <typename Compare>
-struct upper_bound_adapter {
-  explicit upper_bound_adapter(const Compare &c) : comp(c) {}
-  template <typename K1, typename K2>
-  bool operator()(const K1 &a, const K2 &b) const {
-    // Returns true when a is not greater than b.
-    return !compare_internal::compare_result_as_less_than(comp(b, a));
-  }
-
- private:
-  Compare comp;
-};
-
-enum class MatchKind : uint8_t { kEq, kNe };
-
-template <typename V, bool IsCompareTo>
-struct SearchResult {
-  V value;
-  MatchKind match;
-
-  static constexpr bool HasMatch() { return true; }
-  bool IsEq() const { return match == MatchKind::kEq; }
-};
-
-// When we don't use CompareTo, `match` is not present.
-// This ensures that callers can't use it accidentally when it provides no
-// useful information.
-template <typename V>
-struct SearchResult<V, false> {
-  SearchResult() {}
-  explicit SearchResult(V value) : value(value) {}
-  SearchResult(V value, MatchKind /*match*/) : value(value) {}
-
-  V value;
-
-  static constexpr bool HasMatch() { return false; }
-  static constexpr bool IsEq() { return false; }
-};
-
-// A node in the btree holding. The same node type is used for both internal
-// and leaf nodes in the btree, though the nodes are allocated in such a way
-// that the children array is only valid in internal nodes.
-template <typename Params>
-class btree_node {
-  using is_key_compare_to = typename Params::is_key_compare_to;
-  using field_type = typename Params::node_count_type;
-  using allocator_type = typename Params::allocator_type;
-  using slot_type = typename Params::slot_type;
-
- public:
-  using params_type = Params;
-  using key_type = typename Params::key_type;
-  using value_type = typename Params::value_type;
-  using pointer = typename Params::pointer;
-  using const_pointer = typename Params::const_pointer;
-  using reference = typename Params::reference;
-  using const_reference = typename Params::const_reference;
-  using key_compare = typename Params::key_compare;
-  using size_type = typename Params::size_type;
-  using difference_type = typename Params::difference_type;
-
-  // Btree decides whether to use linear node search as follows:
-  //   - If the comparator expresses a preference, use that.
-  //   - If the key expresses a preference, use that.
-  //   - If the key is arithmetic and the comparator is std::less or
-  //     std::greater, choose linear.
-  //   - Otherwise, choose binary.
-  // TODO(ezb): Might make sense to add condition(s) based on node-size.
-  using use_linear_search = std::integral_constant<
-      bool,
-      has_linear_node_search_preference<key_compare>::value
-          ? prefers_linear_node_search<key_compare>::value
-          : has_linear_node_search_preference<key_type>::value
-                ? prefers_linear_node_search<key_type>::value
-                : std::is_arithmetic<key_type>::value &&
-                      (std::is_same<std::less<key_type>, key_compare>::value ||
-                       std::is_same<std::greater<key_type>,
-                                    key_compare>::value)>;
-
-  // This class is organized by gtl::Layout as if it had the following
-  // structure:
-  //   // A pointer to the node's parent.
-  //   btree_node *parent;
-  //
-  //   // The position of the node in the node's parent.
-  //   field_type position;
-  //   // The index of the first populated value in `values`.
-  //   // TODO(ezb): right now, `start` is always 0. Update insertion/merge
-  //   // logic to allow for floating storage within nodes.
-  //   field_type start;
-  //   // The index after the last populated value in `values`. Currently, this
-  //   // is the same as the count of values.
-  //   field_type finish;
-  //   // The maximum number of values the node can hold. This is an integer in
-  //   // [1, kNodeValues] for root leaf nodes, kNodeValues for non-root leaf
-  //   // nodes, and kInternalNodeMaxCount (as a sentinel value) for internal
-  //   // nodes (even though there are still kNodeValues values in the node).
-  //   // TODO(ezb): make max_count use only 4 bits and record log2(capacity)
-  //   // to free extra bits for is_root, etc.
-  //   field_type max_count;
-  //
-  //   // The array of values. The capacity is `max_count` for leaf nodes and
-  //   // kNodeValues for internal nodes. Only the values in
-  //   // [start, finish) have been initialized and are valid.
-  //   slot_type values[max_count];
-  //
-  //   // The array of child pointers. The keys in children[i] are all less
-  //   // than key(i). The keys in children[i + 1] are all greater than key(i).
-  //   // There are 0 children for leaf nodes and kNodeValues + 1 children for
-  //   // internal nodes.
-  //   btree_node *children[kNodeValues + 1];
-  //
-  // This class is only constructed by EmptyNodeType. Normally, pointers to the
-  // layout above are allocated, cast to btree_node*, and de-allocated within
-  // the btree implementation.
-  ~btree_node() = default;
-  btree_node(btree_node const &) = delete;
-  btree_node &operator=(btree_node const &) = delete;
-
-  // Public for EmptyNodeType.
-  constexpr static size_type Alignment() {
-    static_assert(LeafLayout(1).Alignment() == InternalLayout().Alignment(),
-                  "Alignment of all nodes must be equal.");
-    return InternalLayout().Alignment();
-  }
-
- protected:
-  btree_node() = default;
-
- private:
-  using layout_type = absl::container_internal::Layout<btree_node *, field_type,
-                                                       slot_type, btree_node *>;
-  constexpr static size_type SizeWithNValues(size_type n) {
-    return layout_type(/*parent*/ 1,
-                       /*position, start, finish, max_count*/ 4,
-                       /*values*/ n,
-                       /*children*/ 0)
-        .AllocSize();
-  }
-  // A lower bound for the overhead of fields other than values in a leaf node.
-  constexpr static size_type MinimumOverhead() {
-    return SizeWithNValues(1) - sizeof(value_type);
-  }
-
-  // Compute how many values we can fit onto a leaf node taking into account
-  // padding.
-  constexpr static size_type NodeTargetValues(const int begin, const int end) {
-    return begin == end ? begin
-                        : SizeWithNValues((begin + end) / 2 + 1) >
-                                  params_type::kTargetNodeSize
-                              ? NodeTargetValues(begin, (begin + end) / 2)
-                              : NodeTargetValues((begin + end) / 2 + 1, end);
-  }
-
-  enum {
-    kTargetNodeSize = params_type::kTargetNodeSize,
-    kNodeTargetValues = NodeTargetValues(0, params_type::kTargetNodeSize),
-
-    // We need a minimum of 3 values per internal node in order to perform
-    // splitting (1 value for the two nodes involved in the split and 1 value
-    // propagated to the parent as the delimiter for the split).
-    kNodeValues = kNodeTargetValues >= 3 ? kNodeTargetValues : 3,
-
-    // The node is internal (i.e. is not a leaf node) if and only if `max_count`
-    // has this value.
-    kInternalNodeMaxCount = 0,
-  };
-
-  // Leaves can have less than kNodeValues values.
-  constexpr static layout_type LeafLayout(const int max_values = kNodeValues) {
-    return layout_type(/*parent*/ 1,
-                       /*position, start, finish, max_count*/ 4,
-                       /*values*/ max_values,
-                       /*children*/ 0);
-  }
-  constexpr static layout_type InternalLayout() {
-    return layout_type(/*parent*/ 1,
-                       /*position, start, finish, max_count*/ 4,
-                       /*values*/ kNodeValues,
-                       /*children*/ kNodeValues + 1);
-  }
-  constexpr static size_type LeafSize(const int max_values = kNodeValues) {
-    return LeafLayout(max_values).AllocSize();
-  }
-  constexpr static size_type InternalSize() {
-    return InternalLayout().AllocSize();
-  }
-
-  // N is the index of the type in the Layout definition.
-  // ElementType<N> is the Nth type in the Layout definition.
-  template <size_type N>
-  inline typename layout_type::template ElementType<N> *GetField() {
-    // We assert that we don't read from values that aren't there.
-    assert(N < 3 || !leaf());
-    return InternalLayout().template Pointer<N>(reinterpret_cast<char *>(this));
-  }
-  template <size_type N>
-  inline const typename layout_type::template ElementType<N> *GetField() const {
-    assert(N < 3 || !leaf());
-    return InternalLayout().template Pointer<N>(
-        reinterpret_cast<const char *>(this));
-  }
-  void set_parent(btree_node *p) { *GetField<0>() = p; }
-  field_type &mutable_finish() { return GetField<1>()[2]; }
-  slot_type *slot(int i) { return &GetField<2>()[i]; }
-  slot_type *start_slot() { return slot(start()); }
-  slot_type *finish_slot() { return slot(finish()); }
-  const slot_type *slot(int i) const { return &GetField<2>()[i]; }
-  void set_position(field_type v) { GetField<1>()[0] = v; }
-  void set_start(field_type v) { GetField<1>()[1] = v; }
-  void set_finish(field_type v) { GetField<1>()[2] = v; }
-  // This method is only called by the node init methods.
-  void set_max_count(field_type v) { GetField<1>()[3] = v; }
-
- public:
-  // Whether this is a leaf node or not. This value doesn't change after the
-  // node is created.
-  bool leaf() const { return GetField<1>()[3] != kInternalNodeMaxCount; }
-
-  // Getter for the position of this node in its parent.
-  field_type position() const { return GetField<1>()[0]; }
-
-  // Getter for the offset of the first value in the `values` array.
-  field_type start() const {
-    // TODO(ezb): when floating storage is implemented, return GetField<1>()[1];
-    assert(GetField<1>()[1] == 0);
-    return 0;
-  }
-
-  // Getter for the offset after the last value in the `values` array.
-  field_type finish() const { return GetField<1>()[2]; }
-
-  // Getters for the number of values stored in this node.
-  field_type count() const {
-    assert(finish() >= start());
-    return finish() - start();
-  }
-  field_type max_count() const {
-    // Internal nodes have max_count==kInternalNodeMaxCount.
-    // Leaf nodes have max_count in [1, kNodeValues].
-    const field_type max_count = GetField<1>()[3];
-    return max_count == field_type{kInternalNodeMaxCount}
-               ? field_type{kNodeValues}
-               : max_count;
-  }
-
-  // Getter for the parent of this node.
-  btree_node *parent() const { return *GetField<0>(); }
-  // Getter for whether the node is the root of the tree. The parent of the
-  // root of the tree is the leftmost node in the tree which is guaranteed to
-  // be a leaf.
-  bool is_root() const { return parent()->leaf(); }
-  void make_root() {
-    assert(parent()->is_root());
-    set_parent(parent()->parent());
-  }
-
-  // Getters for the key/value at position i in the node.
-  const key_type &key(int i) const { return params_type::key(slot(i)); }
-  reference value(int i) { return params_type::element(slot(i)); }
-  const_reference value(int i) const { return params_type::element(slot(i)); }
-
-  // Getters/setter for the child at position i in the node.
-  btree_node *child(int i) const { return GetField<3>()[i]; }
-  btree_node *start_child() const { return child(start()); }
-  btree_node *&mutable_child(int i) { return GetField<3>()[i]; }
-  void clear_child(int i) {
-    absl::container_internal::SanitizerPoisonObject(&mutable_child(i));
-  }
-  void set_child(int i, btree_node *c) {
-    absl::container_internal::SanitizerUnpoisonObject(&mutable_child(i));
-    mutable_child(i) = c;
-    c->set_position(i);
-  }
-  void init_child(int i, btree_node *c) {
-    set_child(i, c);
-    c->set_parent(this);
-  }
-
-  // Returns the position of the first value whose key is not less than k.
-  template <typename K>
-  SearchResult<int, is_key_compare_to::value> lower_bound(
-      const K &k, const key_compare &comp) const {
-    return use_linear_search::value ? linear_search(k, comp)
-                                    : binary_search(k, comp);
-  }
-  // Returns the position of the first value whose key is greater than k.
-  template <typename K>
-  int upper_bound(const K &k, const key_compare &comp) const {
-    auto upper_compare = upper_bound_adapter<key_compare>(comp);
-    return use_linear_search::value ? linear_search(k, upper_compare).value
-                                    : binary_search(k, upper_compare).value;
-  }
-
-  template <typename K, typename Compare>
-  SearchResult<int, btree_is_key_compare_to<Compare, key_type>::value>
-  linear_search(const K &k, const Compare &comp) const {
-    return linear_search_impl(k, start(), finish(), comp,
-                              btree_is_key_compare_to<Compare, key_type>());
-  }
-
-  template <typename K, typename Compare>
-  SearchResult<int, btree_is_key_compare_to<Compare, key_type>::value>
-  binary_search(const K &k, const Compare &comp) const {
-    return binary_search_impl(k, start(), finish(), comp,
-                              btree_is_key_compare_to<Compare, key_type>());
-  }
-
-  // Returns the position of the first value whose key is not less than k using
-  // linear search performed using plain compare.
-  template <typename K, typename Compare>
-  SearchResult<int, false> linear_search_impl(
-      const K &k, int s, const int e, const Compare &comp,
-      std::false_type /* IsCompareTo */) const {
-    while (s < e) {
-      if (!comp(key(s), k)) {
-        break;
-      }
-      ++s;
-    }
-    return SearchResult<int, false>{s};
-  }
-
-  // Returns the position of the first value whose key is not less than k using
-  // linear search performed using compare-to.
-  template <typename K, typename Compare>
-  SearchResult<int, true> linear_search_impl(
-      const K &k, int s, const int e, const Compare &comp,
-      std::true_type /* IsCompareTo */) const {
-    while (s < e) {
-      const absl::weak_ordering c = comp(key(s), k);
-      if (c == 0) {
-        return {s, MatchKind::kEq};
-      } else if (c > 0) {
-        break;
-      }
-      ++s;
-    }
-    return {s, MatchKind::kNe};
-  }
-
-  // Returns the position of the first value whose key is not less than k using
-  // binary search performed using plain compare.
-  template <typename K, typename Compare>
-  SearchResult<int, false> binary_search_impl(
-      const K &k, int s, int e, const Compare &comp,
-      std::false_type /* IsCompareTo */) const {
-    while (s != e) {
-      const int mid = (s + e) >> 1;
-      if (comp(key(mid), k)) {
-        s = mid + 1;
-      } else {
-        e = mid;
-      }
-    }
-    return SearchResult<int, false>{s};
-  }
-
-  // Returns the position of the first value whose key is not less than k using
-  // binary search performed using compare-to.
-  template <typename K, typename CompareTo>
-  SearchResult<int, true> binary_search_impl(
-      const K &k, int s, int e, const CompareTo &comp,
-      std::true_type /* IsCompareTo */) const {
-    if (params_type::template can_have_multiple_equivalent_keys<K>()) {
-      MatchKind exact_match = MatchKind::kNe;
-      while (s != e) {
-        const int mid = (s + e) >> 1;
-        const absl::weak_ordering c = comp(key(mid), k);
-        if (c < 0) {
-          s = mid + 1;
-        } else {
-          e = mid;
-          if (c == 0) {
-            // Need to return the first value whose key is not less than k,
-            // which requires continuing the binary search if there could be
-            // multiple equivalent keys.
-            exact_match = MatchKind::kEq;
-          }
-        }
-      }
-      return {s, exact_match};
-    } else {  // Can't have multiple equivalent keys.
-      while (s != e) {
-        const int mid = (s + e) >> 1;
-        const absl::weak_ordering c = comp(key(mid), k);
-        if (c < 0) {
-          s = mid + 1;
-        } else if (c > 0) {
-          e = mid;
-        } else {
-          return {mid, MatchKind::kEq};
-        }
-      }
-      return {s, MatchKind::kNe};
-    }
-  }
-
-  // Emplaces a value at position i, shifting all existing values and
-  // children at positions >= i to the right by 1.
-  template <typename... Args>
-  void emplace_value(size_type i, allocator_type *alloc, Args &&... args);
-
-  // Removes the values at positions [i, i + to_erase), shifting all existing
-  // values and children after that range to the left by to_erase. Clears all
-  // children between [i, i + to_erase).
-  void remove_values(field_type i, field_type to_erase, allocator_type *alloc);
-
-  // Rebalances a node with its right sibling.
-  void rebalance_right_to_left(int to_move, btree_node *right,
-                               allocator_type *alloc);
-  void rebalance_left_to_right(int to_move, btree_node *right,
-                               allocator_type *alloc);
-
-  // Splits a node, moving a portion of the node's values to its right sibling.
-  void split(int insert_position, btree_node *dest, allocator_type *alloc);
-
-  // Merges a node with its right sibling, moving all of the values and the
-  // delimiting key in the parent node onto itself, and deleting the src node.
-  void merge(btree_node *src, allocator_type *alloc);
-
-  // Node allocation/deletion routines.
-  void init_leaf(btree_node *parent, int max_count) {
-    set_parent(parent);
-    set_position(0);
-    set_start(0);
-    set_finish(0);
-    set_max_count(max_count);
-    absl::container_internal::SanitizerPoisonMemoryRegion(
-        start_slot(), max_count * sizeof(slot_type));
-  }
-  void init_internal(btree_node *parent) {
-    init_leaf(parent, kNodeValues);
-    // Set `max_count` to a sentinel value to indicate that this node is
-    // internal.
-    set_max_count(kInternalNodeMaxCount);
-    absl::container_internal::SanitizerPoisonMemoryRegion(
-        &mutable_child(start()), (kNodeValues + 1) * sizeof(btree_node *));
-  }
-
-  static void deallocate(const size_type size, btree_node *node,
-                         allocator_type *alloc) {
-    absl::container_internal::Deallocate<Alignment()>(alloc, node, size);
-  }
-
-  // Deletes a node and all of its children.
-  static void clear_and_delete(btree_node *node, allocator_type *alloc);
-
- private:
-  template <typename... Args>
-  void value_init(const field_type i, allocator_type *alloc, Args &&... args) {
-    absl::container_internal::SanitizerUnpoisonObject(slot(i));
-    params_type::construct(alloc, slot(i), std::forward<Args>(args)...);
-  }
-  void value_destroy(const field_type i, allocator_type *alloc) {
-    params_type::destroy(alloc, slot(i));
-    absl::container_internal::SanitizerPoisonObject(slot(i));
-  }
-  void value_destroy_n(const field_type i, const field_type n,
-                       allocator_type *alloc) {
-    for (slot_type *s = slot(i), *end = slot(i + n); s != end; ++s) {
-      params_type::destroy(alloc, s);
-      absl::container_internal::SanitizerPoisonObject(s);
-    }
-  }
-
-  static void transfer(slot_type *dest, slot_type *src, allocator_type *alloc) {
-    absl::container_internal::SanitizerUnpoisonObject(dest);
-    params_type::transfer(alloc, dest, src);
-    absl::container_internal::SanitizerPoisonObject(src);
-  }
-
-  // Transfers value from slot `src_i` in `src_node` to slot `dest_i` in `this`.
-  void transfer(const size_type dest_i, const size_type src_i,
-                btree_node *src_node, allocator_type *alloc) {
-    transfer(slot(dest_i), src_node->slot(src_i), alloc);
-  }
-
-  // Transfers `n` values starting at value `src_i` in `src_node` into the
-  // values starting at value `dest_i` in `this`.
-  void transfer_n(const size_type n, const size_type dest_i,
-                  const size_type src_i, btree_node *src_node,
-                  allocator_type *alloc) {
-    for (slot_type *src = src_node->slot(src_i), *end = src + n,
-                   *dest = slot(dest_i);
-         src != end; ++src, ++dest) {
-      transfer(dest, src, alloc);
-    }
-  }
-
-  // Same as above, except that we start at the end and work our way to the
-  // beginning.
-  void transfer_n_backward(const size_type n, const size_type dest_i,
-                           const size_type src_i, btree_node *src_node,
-                           allocator_type *alloc) {
-    for (slot_type *src = src_node->slot(src_i + n - 1), *end = src - n,
-                   *dest = slot(dest_i + n - 1);
-         src != end; --src, --dest) {
-      transfer(dest, src, alloc);
-    }
-  }
-
-  template <typename P>
-  friend class btree;
-  template <typename N, typename R, typename P>
-  friend struct btree_iterator;
-  friend class BtreeNodePeer;
-};
-
-template <typename Node, typename Reference, typename Pointer>
-struct btree_iterator {
- private:
-  using key_type = typename Node::key_type;
-  using size_type = typename Node::size_type;
-  using params_type = typename Node::params_type;
-  using is_map_container = typename params_type::is_map_container;
-
-  using node_type = Node;
-  using normal_node = typename std::remove_const<Node>::type;
-  using const_node = const Node;
-  using normal_pointer = typename params_type::pointer;
-  using normal_reference = typename params_type::reference;
-  using const_pointer = typename params_type::const_pointer;
-  using const_reference = typename params_type::const_reference;
-  using slot_type = typename params_type::slot_type;
-
-  using iterator =
-     btree_iterator<normal_node, normal_reference, normal_pointer>;
-  using const_iterator =
-      btree_iterator<const_node, const_reference, const_pointer>;
-
- public:
-  // These aliases are public for std::iterator_traits.
-  using difference_type = typename Node::difference_type;
-  using value_type = typename params_type::value_type;
-  using pointer = Pointer;
-  using reference = Reference;
-  using iterator_category = std::bidirectional_iterator_tag;
-
-  btree_iterator() : node(nullptr), position(-1) {}
-  explicit btree_iterator(Node *n) : node(n), position(n->start()) {}
-  btree_iterator(Node *n, int p) : node(n), position(p) {}
-
-  // NOTE: this SFINAE allows for implicit conversions from iterator to
-  // const_iterator, but it specifically avoids hiding the copy constructor so
-  // that the trivial one will be used when possible.
-  template <typename N, typename R, typename P,
-            absl::enable_if_t<
-                std::is_same<btree_iterator<N, R, P>, iterator>::value &&
-                    std::is_same<btree_iterator, const_iterator>::value,
-                int> = 0>
-  btree_iterator(const btree_iterator<N, R, P> other)  // NOLINT
-      : node(other.node), position(other.position) {}
-
- private:
-  // This SFINAE allows explicit conversions from const_iterator to
-  // iterator, but also avoids hiding the copy constructor.
-  // NOTE: the const_cast is safe because this constructor is only called by
-  // non-const methods and the container owns the nodes.
-  template <typename N, typename R, typename P,
-            absl::enable_if_t<
-                std::is_same<btree_iterator<N, R, P>, const_iterator>::value &&
-                    std::is_same<btree_iterator, iterator>::value,
-                int> = 0>
-  explicit btree_iterator(const btree_iterator<N, R, P> other)
-      : node(const_cast<node_type *>(other.node)), position(other.position) {}
-
-  // Increment/decrement the iterator.
-  void increment() {
-    if (node->leaf() && ++position < node->finish()) {
-      return;
-    }
-    increment_slow();
-  }
-  void increment_slow();
-
-  void decrement() {
-    if (node->leaf() && --position >= node->start()) {
-      return;
-    }
-    decrement_slow();
-  }
-  void decrement_slow();
-
- public:
-  bool operator==(const iterator &other) const {
-    return node == other.node && position == other.position;
-  }
-  bool operator==(const const_iterator &other) const {
-    return node == other.node && position == other.position;
-  }
-  bool operator!=(const iterator &other) const {
-    return node != other.node || position != other.position;
-  }
-  bool operator!=(const const_iterator &other) const {
-    return node != other.node || position != other.position;
-  }
-
-  // Accessors for the key/value the iterator is pointing at.
-  reference operator*() const {
-    ABSL_HARDENING_ASSERT(node != nullptr);
-    ABSL_HARDENING_ASSERT(node->start() <= position);
-    ABSL_HARDENING_ASSERT(node->finish() > position);
-    return node->value(position);
-  }
-  pointer operator->() const { return &operator*(); }
-
-  btree_iterator &operator++() {
-    increment();
-    return *this;
-  }
-  btree_iterator &operator--() {
-    decrement();
-    return *this;
-  }
-  btree_iterator operator++(int) {
-    btree_iterator tmp = *this;
-    ++*this;
-    return tmp;
-  }
-  btree_iterator operator--(int) {
-    btree_iterator tmp = *this;
-    --*this;
-    return tmp;
-  }
-
- private:
-  friend iterator;
-  friend const_iterator;
-  template <typename Params>
-  friend class btree;
-  template <typename Tree>
-  friend class btree_container;
-  template <typename Tree>
-  friend class btree_set_container;
-  template <typename Tree>
-  friend class btree_map_container;
-  template <typename Tree>
-  friend class btree_multiset_container;
-  template <typename TreeType, typename CheckerType>
-  friend class base_checker;
-
-  const key_type &key() const { return node->key(position); }
-  slot_type *slot() { return node->slot(position); }
-
-  // The node in the tree the iterator is pointing at.
-  Node *node;
-  // The position within the node of the tree the iterator is pointing at.
-  // NOTE: this is an int rather than a field_type because iterators can point
-  // to invalid positions (such as -1) in certain circumstances.
-  int position;
-};
-
-template <typename Params>
-class btree {
-  using node_type = btree_node<Params>;
-  using is_key_compare_to = typename Params::is_key_compare_to;
-  using init_type = typename Params::init_type;
-  using field_type = typename node_type::field_type;
-
-  // We use a static empty node for the root/leftmost/rightmost of empty btrees
-  // in order to avoid branching in begin()/end().
-  struct alignas(node_type::Alignment()) EmptyNodeType : node_type {
-    using field_type = typename node_type::field_type;
-    node_type *parent;
-    field_type position = 0;
-    field_type start = 0;
-    field_type finish = 0;
-    // max_count must be != kInternalNodeMaxCount (so that this node is regarded
-    // as a leaf node). max_count() is never called when the tree is empty.
-    field_type max_count = node_type::kInternalNodeMaxCount + 1;
-
-#ifdef _MSC_VER
-    // MSVC has constexpr code generations bugs here.
-    EmptyNodeType() : parent(this) {}
-#else
-    constexpr EmptyNodeType(node_type *p) : parent(p) {}
-#endif
-  };
-
-  static node_type *EmptyNode() {
-#ifdef _MSC_VER
-    static EmptyNodeType *empty_node = new EmptyNodeType;
-    // This assert fails on some other construction methods.
-    assert(empty_node->parent == empty_node);
-    return empty_node;
-#else
-    static constexpr EmptyNodeType empty_node(
-        const_cast<EmptyNodeType *>(&empty_node));
-    return const_cast<EmptyNodeType *>(&empty_node);
-#endif
-  }
-
-  enum : uint32_t {
-    kNodeValues = node_type::kNodeValues,
-    kMinNodeValues = kNodeValues / 2,
-  };
-
-  struct node_stats {
-    using size_type = typename Params::size_type;
-
-    node_stats(size_type l, size_type i) : leaf_nodes(l), internal_nodes(i) {}
-
-    node_stats &operator+=(const node_stats &other) {
-      leaf_nodes += other.leaf_nodes;
-      internal_nodes += other.internal_nodes;
-      return *this;
-    }
-
-    size_type leaf_nodes;
-    size_type internal_nodes;
-  };
-
- public:
-  using key_type = typename Params::key_type;
-  using value_type = typename Params::value_type;
-  using size_type = typename Params::size_type;
-  using difference_type = typename Params::difference_type;
-  using key_compare = typename Params::key_compare;
-  using value_compare = typename Params::value_compare;
-  using allocator_type = typename Params::allocator_type;
-  using reference = typename Params::reference;
-  using const_reference = typename Params::const_reference;
-  using pointer = typename Params::pointer;
-  using const_pointer = typename Params::const_pointer;
-  using iterator =
-      typename btree_iterator<node_type, reference, pointer>::iterator;
-  using const_iterator = typename iterator::const_iterator;
-  using reverse_iterator = std::reverse_iterator<iterator>;
-  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
-  using node_handle_type = node_handle<Params, Params, allocator_type>;
-
-  // Internal types made public for use by btree_container types.
-  using params_type = Params;
-  using slot_type = typename Params::slot_type;
-
- private:
-  // For use in copy_or_move_values_in_order.
-  const value_type &maybe_move_from_iterator(const_iterator it) { return *it; }
-  value_type &&maybe_move_from_iterator(iterator it) {
-    // This is a destructive operation on the other container so it's safe for
-    // us to const_cast and move from the keys here even if it's a set.
-    return std::move(const_cast<value_type &>(*it));
-  }
-
-  // Copies or moves (depending on the template parameter) the values in
-  // other into this btree in their order in other. This btree must be empty
-  // before this method is called. This method is used in copy construction,
-  // copy assignment, and move assignment.
-  template <typename Btree>
-  void copy_or_move_values_in_order(Btree &other);
-
-  // Validates that various assumptions/requirements are true at compile time.
-  constexpr static bool static_assert_validation();
-
- public:
-  btree(const key_compare &comp, const allocator_type &alloc)
-      : root_(comp, alloc, EmptyNode()), rightmost_(EmptyNode()), size_(0) {}
-
-  btree(const btree &other) : btree(other, other.allocator()) {}
-  btree(const btree &other, const allocator_type &alloc)
-      : btree(other.key_comp(), alloc) {
-    copy_or_move_values_in_order(other);
-  }
-  btree(btree &&other) noexcept
-      : root_(std::move(other.root_)),
-        rightmost_(absl::exchange(other.rightmost_, EmptyNode())),
-        size_(absl::exchange(other.size_, 0)) {
-    other.mutable_root() = EmptyNode();
-  }
-  btree(btree &&other, const allocator_type &alloc)
-      : btree(other.key_comp(), alloc) {
-    if (alloc == other.allocator()) {
-      swap(other);
-    } else {
-      // Move values from `other` one at a time when allocators are different.
-      copy_or_move_values_in_order(other);
-    }
-  }
-
-  ~btree() {
-    // Put static_asserts in destructor to avoid triggering them before the type
-    // is complete.
-    static_assert(static_assert_validation(), "This call must be elided.");
-    clear();
-  }
-
-  // Assign the contents of other to *this.
-  btree &operator=(const btree &other);
-  btree &operator=(btree &&other) noexcept;
-
-  iterator begin() { return iterator(leftmost()); }
-  const_iterator begin() const { return const_iterator(leftmost()); }
-  iterator end() { return iterator(rightmost_, rightmost_->finish()); }
-  const_iterator end() const {
-    return const_iterator(rightmost_, rightmost_->finish());
-  }
-  reverse_iterator rbegin() { return reverse_iterator(end()); }
-  const_reverse_iterator rbegin() const {
-    return const_reverse_iterator(end());
-  }
-  reverse_iterator rend() { return reverse_iterator(begin()); }
-  const_reverse_iterator rend() const {
-    return const_reverse_iterator(begin());
-  }
-
-  // Finds the first element whose key is not less than `key`.
-  template <typename K>
-  iterator lower_bound(const K &key) {
-    return internal_end(internal_lower_bound(key).value);
-  }
-  template <typename K>
-  const_iterator lower_bound(const K &key) const {
-    return internal_end(internal_lower_bound(key).value);
-  }
-
-  // Finds the first element whose key is not less than `key` and also returns
-  // whether that element is equal to `key`.
-  template <typename K>
-  std::pair<iterator, bool> lower_bound_equal(const K &key) const;
-
-  // Finds the first element whose key is greater than `key`.
-  template <typename K>
-  iterator upper_bound(const K &key) {
-    return internal_end(internal_upper_bound(key));
-  }
-  template <typename K>
-  const_iterator upper_bound(const K &key) const {
-    return internal_end(internal_upper_bound(key));
-  }
-
-  // Finds the range of values which compare equal to key. The first member of
-  // the returned pair is equal to lower_bound(key). The second member of the
-  // pair is equal to upper_bound(key).
-  template <typename K>
-  std::pair<iterator, iterator> equal_range(const K &key);
-  template <typename K>
-  std::pair<const_iterator, const_iterator> equal_range(const K &key) const {
-    return const_cast<btree *>(this)->equal_range(key);
-  }
-
-  // Inserts a value into the btree only if it does not already exist. The
-  // boolean return value indicates whether insertion succeeded or failed.
-  // Requirement: if `key` already exists in the btree, does not consume `args`.
-  // Requirement: `key` is never referenced after consuming `args`.
-  template <typename K, typename... Args>
-  std::pair<iterator, bool> insert_unique(const K &key, Args &&... args);
-
-  // Inserts with hint. Checks to see if the value should be placed immediately
-  // before `position` in the tree. If so, then the insertion will take
-  // amortized constant time. If not, the insertion will take amortized
-  // logarithmic time as if a call to insert_unique() were made.
-  // Requirement: if `key` already exists in the btree, does not consume `args`.
-  // Requirement: `key` is never referenced after consuming `args`.
-  template <typename K, typename... Args>
-  std::pair<iterator, bool> insert_hint_unique(iterator position,
-                                               const K &key,
-                                               Args &&... args);
-
-  // Insert a range of values into the btree.
-  // Note: the first overload avoids constructing a value_type if the key
-  // already exists in the btree.
-  template <typename InputIterator,
-            typename = decltype(std::declval<const key_compare &>()(
-                params_type::key(*std::declval<InputIterator>()),
-                std::declval<const key_type &>()))>
-  void insert_iterator_unique(InputIterator b, InputIterator e, int);
-  // We need the second overload for cases in which we need to construct a
-  // value_type in order to compare it with the keys already in the btree.
-  template <typename InputIterator>
-  void insert_iterator_unique(InputIterator b, InputIterator e, char);
-
-  // Inserts a value into the btree.
-  template <typename ValueType>
-  iterator insert_multi(const key_type &key, ValueType &&v);
-
-  // Inserts a value into the btree.
-  template <typename ValueType>
-  iterator insert_multi(ValueType &&v) {
-    return insert_multi(params_type::key(v), std::forward<ValueType>(v));
-  }
-
-  // Insert with hint. Check to see if the value should be placed immediately
-  // before position in the tree. If it does, then the insertion will take
-  // amortized constant time. If not, the insertion will take amortized
-  // logarithmic time as if a call to insert_multi(v) were made.
-  template <typename ValueType>
-  iterator insert_hint_multi(iterator position, ValueType &&v);
-
-  // Insert a range of values into the btree.
-  template <typename InputIterator>
-  void insert_iterator_multi(InputIterator b, InputIterator e);
-
-  // Erase the specified iterator from the btree. The iterator must be valid
-  // (i.e. not equal to end()).  Return an iterator pointing to the node after
-  // the one that was erased (or end() if none exists).
-  // Requirement: does not read the value at `*iter`.
-  iterator erase(iterator iter);
-
-  // Erases range. Returns the number of keys erased and an iterator pointing
-  // to the element after the last erased element.
-  std::pair<size_type, iterator> erase_range(iterator begin, iterator end);
-
-  // Finds an element with key equivalent to `key` or returns `end()` if `key`
-  // is not present.
-  template <typename K>
-  iterator find(const K &key) {
-    return internal_end(internal_find(key));
-  }
-  template <typename K>
-  const_iterator find(const K &key) const {
-    return internal_end(internal_find(key));
-  }
-
-  // Clear the btree, deleting all of the values it contains.
-  void clear();
-
-  // Swaps the contents of `this` and `other`.
-  void swap(btree &other);
-
-  const key_compare &key_comp() const noexcept {
-    return root_.template get<0>();
-  }
-  template <typename K1, typename K2>
-  bool compare_keys(const K1 &a, const K2 &b) const {
-    return compare_internal::compare_result_as_less_than(key_comp()(a, b));
-  }
-
-  value_compare value_comp() const { return value_compare(key_comp()); }
-
-  // Verifies the structure of the btree.
-  void verify() const;
-
-  // Size routines.
-  size_type size() const { return size_; }
-  size_type max_size() const { return (std::numeric_limits<size_type>::max)(); }
-  bool empty() const { return size_ == 0; }
-
-  // The height of the btree. An empty tree will have height 0.
-  size_type height() const {
-    size_type h = 0;
-    if (!empty()) {
-      // Count the length of the chain from the leftmost node up to the
-      // root. We actually count from the root back around to the level below
-      // the root, but the calculation is the same because of the circularity
-      // of that traversal.
-      const node_type *n = root();
-      do {
-        ++h;
-        n = n->parent();
-      } while (n != root());
-    }
-    return h;
-  }
-
-  // The number of internal, leaf and total nodes used by the btree.
-  size_type leaf_nodes() const { return internal_stats(root()).leaf_nodes; }
-  size_type internal_nodes() const {
-    return internal_stats(root()).internal_nodes;
-  }
-  size_type nodes() const {
-    node_stats stats = internal_stats(root());
-    return stats.leaf_nodes + stats.internal_nodes;
-  }
-
-  // The total number of bytes used by the btree.
-  size_type bytes_used() const {
-    node_stats stats = internal_stats(root());
-    if (stats.leaf_nodes == 1 && stats.internal_nodes == 0) {
-      return sizeof(*this) + node_type::LeafSize(root()->max_count());
-    } else {
-      return sizeof(*this) + stats.leaf_nodes * node_type::LeafSize() +
-             stats.internal_nodes * node_type::InternalSize();
-    }
-  }
-
-  // The average number of bytes used per value stored in the btree.
-  static double average_bytes_per_value() {
-    // Returns the number of bytes per value on a leaf node that is 75%
-    // full. Experimentally, this matches up nicely with the computed number of
-    // bytes per value in trees that had their values inserted in random order.
-    return node_type::LeafSize() / (kNodeValues * 0.75);
-  }
-
-  // The fullness of the btree. Computed as the number of elements in the btree
-  // divided by the maximum number of elements a tree with the current number
-  // of nodes could hold. A value of 1 indicates perfect space
-  // utilization. Smaller values indicate space wastage.
-  // Returns 0 for empty trees.
-  double fullness() const {
-    if (empty()) return 0.0;
-    return static_cast<double>(size()) / (nodes() * kNodeValues);
-  }
-  // The overhead of the btree structure in bytes per node. Computed as the
-  // total number of bytes used by the btree minus the number of bytes used for
-  // storing elements divided by the number of elements.
-  // Returns 0 for empty trees.
-  double overhead() const {
-    if (empty()) return 0.0;
-    return (bytes_used() - size() * sizeof(value_type)) /
-           static_cast<double>(size());
-  }
-
-  // The allocator used by the btree.
-  allocator_type get_allocator() const { return allocator(); }
-
- private:
-  // Internal accessor routines.
-  node_type *root() { return root_.template get<2>(); }
-  const node_type *root() const { return root_.template get<2>(); }
-  node_type *&mutable_root() noexcept { return root_.template get<2>(); }
-  key_compare *mutable_key_comp() noexcept { return &root_.template get<0>(); }
-
-  // The leftmost node is stored as the parent of the root node.
-  node_type *leftmost() { return root()->parent(); }
-  const node_type *leftmost() const { return root()->parent(); }
-
-  // Allocator routines.
-  allocator_type *mutable_allocator() noexcept {
-    return &root_.template get<1>();
-  }
-  const allocator_type &allocator() const noexcept {
-    return root_.template get<1>();
-  }
-
-  // Allocates a correctly aligned node of at least size bytes using the
-  // allocator.
-  node_type *allocate(const size_type size) {
-    return reinterpret_cast<node_type *>(
-        absl::container_internal::Allocate<node_type::Alignment()>(
-            mutable_allocator(), size));
-  }
-
-  // Node creation/deletion routines.
-  node_type *new_internal_node(node_type *parent) {
-    node_type *n = allocate(node_type::InternalSize());
-    n->init_internal(parent);
-    return n;
-  }
-  node_type *new_leaf_node(node_type *parent) {
-    node_type *n = allocate(node_type::LeafSize());
-    n->init_leaf(parent, kNodeValues);
-    return n;
-  }
-  node_type *new_leaf_root_node(const int max_count) {
-    node_type *n = allocate(node_type::LeafSize(max_count));
-    n->init_leaf(/*parent=*/n, max_count);
-    return n;
-  }
-
-  // Deletion helper routines.
-  iterator rebalance_after_delete(iterator iter);
-
-  // Rebalances or splits the node iter points to.
-  void rebalance_or_split(iterator *iter);
-
-  // Merges the values of left, right and the delimiting key on their parent
-  // onto left, removing the delimiting key and deleting right.
-  void merge_nodes(node_type *left, node_type *right);
-
-  // Tries to merge node with its left or right sibling, and failing that,
-  // rebalance with its left or right sibling. Returns true if a merge
-  // occurred, at which point it is no longer valid to access node. Returns
-  // false if no merging took place.
-  bool try_merge_or_rebalance(iterator *iter);
-
-  // Tries to shrink the height of the tree by 1.
-  void try_shrink();
-
-  iterator internal_end(iterator iter) {
-    return iter.node != nullptr ? iter : end();
-  }
-  const_iterator internal_end(const_iterator iter) const {
-    return iter.node != nullptr ? iter : end();
-  }
-
-  // Emplaces a value into the btree immediately before iter. Requires that
-  // key(v) <= iter.key() and (--iter).key() <= key(v).
-  template <typename... Args>
-  iterator internal_emplace(iterator iter, Args &&... args);
-
-  // Returns an iterator pointing to the first value >= the value "iter" is
-  // pointing at. Note that "iter" might be pointing to an invalid location such
-  // as iter.position == iter.node->finish(). This routine simply moves iter up
-  // in the tree to a valid location.
-  // Requires: iter.node is non-null.
-  template <typename IterType>
-  static IterType internal_last(IterType iter);
-
-  // Returns an iterator pointing to the leaf position at which key would
-  // reside in the tree, unless there is an exact match - in which case, the
-  // result may not be on a leaf. When there's a three-way comparator, we can
-  // return whether there was an exact match. This allows the caller to avoid a
-  // subsequent comparison to determine if an exact match was made, which is
-  // important for keys with expensive comparison, such as strings.
-  template <typename K>
-  SearchResult<iterator, is_key_compare_to::value> internal_locate(
-      const K &key) const;
-
-  // Internal routine which implements lower_bound().
-  template <typename K>
-  SearchResult<iterator, is_key_compare_to::value> internal_lower_bound(
-      const K &key) const;
-
-  // Internal routine which implements upper_bound().
-  template <typename K>
-  iterator internal_upper_bound(const K &key) const;
-
-  // Internal routine which implements find().
-  template <typename K>
-  iterator internal_find(const K &key) const;
-
-  // Verifies the tree structure of node.
-  int internal_verify(const node_type *node, const key_type *lo,
-                      const key_type *hi) const;
-
-  node_stats internal_stats(const node_type *node) const {
-    // The root can be a static empty node.
-    if (node == nullptr || (node == root() && empty())) {
-      return node_stats(0, 0);
-    }
-    if (node->leaf()) {
-      return node_stats(1, 0);
-    }
-    node_stats res(0, 1);
-    for (int i = node->start(); i <= node->finish(); ++i) {
-      res += internal_stats(node->child(i));
-    }
-    return res;
-  }
-
-  // We use compressed tuple in order to save space because key_compare and
-  // allocator_type are usually empty.
-  absl::container_internal::CompressedTuple<key_compare, allocator_type,
-                                            node_type *>
-      root_;
-
-  // A pointer to the rightmost node. Note that the leftmost node is stored as
-  // the root's parent.
-  node_type *rightmost_;
-
-  // Number of values.
-  size_type size_;
-};
-
-////
-// btree_node methods
-template <typename P>
-template <typename... Args>
-inline void btree_node<P>::emplace_value(const size_type i,
-                                         allocator_type *alloc,
-                                         Args &&... args) {
-  assert(i >= start());
-  assert(i <= finish());
-  // Shift old values to create space for new value and then construct it in
-  // place.
-  if (i < finish()) {
-    transfer_n_backward(finish() - i, /*dest_i=*/i + 1, /*src_i=*/i, this,
-                        alloc);
-  }
-  value_init(i, alloc, std::forward<Args>(args)...);
-  set_finish(finish() + 1);
-
-  if (!leaf() && finish() > i + 1) {
-    for (int j = finish(); j > i + 1; --j) {
-      set_child(j, child(j - 1));
-    }
-    clear_child(i + 1);
-  }
-}
-
-template <typename P>
-inline void btree_node<P>::remove_values(const field_type i,
-                                         const field_type to_erase,
-                                         allocator_type *alloc) {
-  // Transfer values after the removed range into their new places.
-  value_destroy_n(i, to_erase, alloc);
-  const field_type orig_finish = finish();
-  const field_type src_i = i + to_erase;
-  transfer_n(orig_finish - src_i, i, src_i, this, alloc);
-
-  if (!leaf()) {
-    // Delete all children between begin and end.
-    for (int j = 0; j < to_erase; ++j) {
-      clear_and_delete(child(i + j + 1), alloc);
-    }
-    // Rotate children after end into new positions.
-    for (int j = i + to_erase + 1; j <= orig_finish; ++j) {
-      set_child(j - to_erase, child(j));
-      clear_child(j);
-    }
-  }
-  set_finish(orig_finish - to_erase);
-}
-
-template <typename P>
-void btree_node<P>::rebalance_right_to_left(const int to_move,
-                                            btree_node *right,
-                                            allocator_type *alloc) {
-  assert(parent() == right->parent());
-  assert(position() + 1 == right->position());
-  assert(right->count() >= count());
-  assert(to_move >= 1);
-  assert(to_move <= right->count());
-
-  // 1) Move the delimiting value in the parent to the left node.
-  transfer(finish(), position(), parent(), alloc);
-
-  // 2) Move the (to_move - 1) values from the right node to the left node.
-  transfer_n(to_move - 1, finish() + 1, right->start(), right, alloc);
-
-  // 3) Move the new delimiting value to the parent from the right node.
-  parent()->transfer(position(), right->start() + to_move - 1, right, alloc);
-
-  // 4) Shift the values in the right node to their correct positions.
-  right->transfer_n(right->count() - to_move, right->start(),
-                    right->start() + to_move, right, alloc);
-
-  if (!leaf()) {
-    // Move the child pointers from the right to the left node.
-    for (int i = 0; i < to_move; ++i) {
-      init_child(finish() + i + 1, right->child(i));
-    }
-    for (int i = right->start(); i <= right->finish() - to_move; ++i) {
-      assert(i + to_move <= right->max_count());
-      right->init_child(i, right->child(i + to_move));
-      right->clear_child(i + to_move);
-    }
-  }
-
-  // Fixup `finish` on the left and right nodes.
-  set_finish(finish() + to_move);
-  right->set_finish(right->finish() - to_move);
-}
-
-template <typename P>
-void btree_node<P>::rebalance_left_to_right(const int to_move,
-                                            btree_node *right,
-                                            allocator_type *alloc) {
-  assert(parent() == right->parent());
-  assert(position() + 1 == right->position());
-  assert(count() >= right->count());
-  assert(to_move >= 1);
-  assert(to_move <= count());
-
-  // Values in the right node are shifted to the right to make room for the
-  // new to_move values. Then, the delimiting value in the parent and the
-  // other (to_move - 1) values in the left node are moved into the right node.
-  // Lastly, a new delimiting value is moved from the left node into the
-  // parent, and the remaining empty left node entries are destroyed.
-
-  // 1) Shift existing values in the right node to their correct positions.
-  right->transfer_n_backward(right->count(), right->start() + to_move,
-                             right->start(), right, alloc);
-
-  // 2) Move the delimiting value in the parent to the right node.
-  right->transfer(right->start() + to_move - 1, position(), parent(), alloc);
-
-  // 3) Move the (to_move - 1) values from the left node to the right node.
-  right->transfer_n(to_move - 1, right->start(), finish() - (to_move - 1), this,
-                    alloc);
-
-  // 4) Move the new delimiting value to the parent from the left node.
-  parent()->transfer(position(), finish() - to_move, this, alloc);
-
-  if (!leaf()) {
-    // Move the child pointers from the left to the right node.
-    for (int i = right->finish(); i >= right->start(); --i) {
-      right->init_child(i + to_move, right->child(i));
-      right->clear_child(i);
-    }
-    for (int i = 1; i <= to_move; ++i) {
-      right->init_child(i - 1, child(finish() - to_move + i));
-      clear_child(finish() - to_move + i);
-    }
-  }
-
-  // Fixup the counts on the left and right nodes.
-  set_finish(finish() - to_move);
-  right->set_finish(right->finish() + to_move);
-}
-
-template <typename P>
-void btree_node<P>::split(const int insert_position, btree_node *dest,
-                          allocator_type *alloc) {
-  assert(dest->count() == 0);
-  assert(max_count() == kNodeValues);
-
-  // We bias the split based on the position being inserted. If we're
-  // inserting at the beginning of the left node then bias the split to put
-  // more values on the right node. If we're inserting at the end of the
-  // right node then bias the split to put more values on the left node.
-  if (insert_position == start()) {
-    dest->set_finish(dest->start() + finish() - 1);
-  } else if (insert_position == kNodeValues) {
-    dest->set_finish(dest->start());
-  } else {
-    dest->set_finish(dest->start() + count() / 2);
-  }
-  set_finish(finish() - dest->count());
-  assert(count() >= 1);
-
-  // Move values from the left sibling to the right sibling.
-  dest->transfer_n(dest->count(), dest->start(), finish(), this, alloc);
-
-  // The split key is the largest value in the left sibling.
-  --mutable_finish();
-  parent()->emplace_value(position(), alloc, finish_slot());
-  value_destroy(finish(), alloc);
-  parent()->init_child(position() + 1, dest);
-
-  if (!leaf()) {
-    for (int i = dest->start(), j = finish() + 1; i <= dest->finish();
-         ++i, ++j) {
-      assert(child(j) != nullptr);
-      dest->init_child(i, child(j));
-      clear_child(j);
-    }
-  }
-}
-
-template <typename P>
-void btree_node<P>::merge(btree_node *src, allocator_type *alloc) {
-  assert(parent() == src->parent());
-  assert(position() + 1 == src->position());
-
-  // Move the delimiting value to the left node.
-  value_init(finish(), alloc, parent()->slot(position()));
-
-  // Move the values from the right to the left node.
-  transfer_n(src->count(), finish() + 1, src->start(), src, alloc);
-
-  if (!leaf()) {
-    // Move the child pointers from the right to the left node.
-    for (int i = src->start(), j = finish() + 1; i <= src->finish(); ++i, ++j) {
-      init_child(j, src->child(i));
-      src->clear_child(i);
-    }
-  }
-
-  // Fixup `finish` on the src and dest nodes.
-  set_finish(start() + 1 + count() + src->count());
-  src->set_finish(src->start());
-
-  // Remove the value on the parent node and delete the src node.
-  parent()->remove_values(position(), /*to_erase=*/1, alloc);
-}
-
-template <typename P>
-void btree_node<P>::clear_and_delete(btree_node *node, allocator_type *alloc) {
-  if (node->leaf()) {
-    node->value_destroy_n(node->start(), node->count(), alloc);
-    deallocate(LeafSize(node->max_count()), node, alloc);
-    return;
-  }
-  if (node->count() == 0) {
-    deallocate(InternalSize(), node, alloc);
-    return;
-  }
-
-  // The parent of the root of the subtree we are deleting.
-  btree_node *delete_root_parent = node->parent();
-
-  // Navigate to the leftmost leaf under node, and then delete upwards.
-  while (!node->leaf()) node = node->start_child();
-  // Use `int` because `pos` needs to be able to hold `kNodeValues+1`, which
-  // isn't guaranteed to be a valid `field_type`.
-  int pos = node->position();
-  btree_node *parent = node->parent();
-  for (;;) {
-    // In each iteration of the next loop, we delete one leaf node and go right.
-    assert(pos <= parent->finish());
-    do {
-      node = parent->child(pos);
-      if (!node->leaf()) {
-        // Navigate to the leftmost leaf under node.
-        while (!node->leaf()) node = node->start_child();
-        pos = node->position();
-        parent = node->parent();
-      }
-      node->value_destroy_n(node->start(), node->count(), alloc);
-      deallocate(LeafSize(node->max_count()), node, alloc);
-      ++pos;
-    } while (pos <= parent->finish());
-
-    // Once we've deleted all children of parent, delete parent and go up/right.
-    assert(pos > parent->finish());
-    do {
-      node = parent;
-      pos = node->position();
-      parent = node->parent();
-      node->value_destroy_n(node->start(), node->count(), alloc);
-      deallocate(InternalSize(), node, alloc);
-      if (parent == delete_root_parent) return;
-      ++pos;
-    } while (pos > parent->finish());
-  }
-}
-
-////
-// btree_iterator methods
-template <typename N, typename R, typename P>
-void btree_iterator<N, R, P>::increment_slow() {
-  if (node->leaf()) {
-    assert(position >= node->finish());
-    btree_iterator save(*this);
-    while (position == node->finish() && !node->is_root()) {
-      assert(node->parent()->child(node->position()) == node);
-      position = node->position();
-      node = node->parent();
-    }
-    // TODO(ezb): assert we aren't incrementing end() instead of handling.
-    if (position == node->finish()) {
-      *this = save;
-    }
-  } else {
-    assert(position < node->finish());
-    node = node->child(position + 1);
-    while (!node->leaf()) {
-      node = node->start_child();
-    }
-    position = node->start();
-  }
-}
-
-template <typename N, typename R, typename P>
-void btree_iterator<N, R, P>::decrement_slow() {
-  if (node->leaf()) {
-    assert(position <= -1);
-    btree_iterator save(*this);
-    while (position < node->start() && !node->is_root()) {
-      assert(node->parent()->child(node->position()) == node);
-      position = node->position() - 1;
-      node = node->parent();
-    }
-    // TODO(ezb): assert we aren't decrementing begin() instead of handling.
-    if (position < node->start()) {
-      *this = save;
-    }
-  } else {
-    assert(position >= node->start());
-    node = node->child(position);
-    while (!node->leaf()) {
-      node = node->child(node->finish());
-    }
-    position = node->finish() - 1;
-  }
-}
-
-////
-// btree methods
-template <typename P>
-template <typename Btree>
-void btree<P>::copy_or_move_values_in_order(Btree &other) {
-  static_assert(std::is_same<btree, Btree>::value ||
-                    std::is_same<const btree, Btree>::value,
-                "Btree type must be same or const.");
-  assert(empty());
-
-  // We can avoid key comparisons because we know the order of the
-  // values is the same order we'll store them in.
-  auto iter = other.begin();
-  if (iter == other.end()) return;
-  insert_multi(maybe_move_from_iterator(iter));
-  ++iter;
-  for (; iter != other.end(); ++iter) {
-    // If the btree is not empty, we can just insert the new value at the end
-    // of the tree.
-    internal_emplace(end(), maybe_move_from_iterator(iter));
-  }
-}
-
-template <typename P>
-constexpr bool btree<P>::static_assert_validation() {
-  static_assert(std::is_nothrow_copy_constructible<key_compare>::value,
-                "Key comparison must be nothrow copy constructible");
-  static_assert(std::is_nothrow_copy_constructible<allocator_type>::value,
-                "Allocator must be nothrow copy constructible");
-  static_assert(type_traits_internal::is_trivially_copyable<iterator>::value,
-                "iterator not trivially copyable.");
-
-  // Note: We assert that kTargetValues, which is computed from
-  // Params::kTargetNodeSize, must fit the node_type::field_type.
-  static_assert(
-      kNodeValues < (1 << (8 * sizeof(typename node_type::field_type))),
-      "target node size too large");
-
-  // Verify that key_compare returns an absl::{weak,strong}_ordering or bool.
-  using compare_result_type =
-      absl::result_of_t<key_compare(key_type, key_type)>;
-  static_assert(
-      std::is_same<compare_result_type, bool>::value ||
-          std::is_convertible<compare_result_type, absl::weak_ordering>::value,
-      "key comparison function must return absl::{weak,strong}_ordering or "
-      "bool.");
-
-  // Test the assumption made in setting kNodeValueSpace.
-  static_assert(node_type::MinimumOverhead() >= sizeof(void *) + 4,
-                "node space assumption incorrect");
-
-  return true;
-}
-
-template <typename P>
-template <typename K>
-auto btree<P>::lower_bound_equal(const K &key) const
-    -> std::pair<iterator, bool> {
-  const SearchResult<iterator, is_key_compare_to::value> res =
-      internal_lower_bound(key);
-  const iterator lower = iterator(internal_end(res.value));
-  const bool equal = res.HasMatch()
-                         ? res.IsEq()
-                         : lower != end() && !compare_keys(key, lower.key());
-  return {lower, equal};
-}
-
-template <typename P>
-template <typename K>
-auto btree<P>::equal_range(const K &key) -> std::pair<iterator, iterator> {
-  const std::pair<iterator, bool> lower_and_equal = lower_bound_equal(key);
-  const iterator lower = lower_and_equal.first;
-  if (!lower_and_equal.second) {
-    return {lower, lower};
-  }
-
-  const iterator next = std::next(lower);
-  if (!params_type::template can_have_multiple_equivalent_keys<K>()) {
-    // The next iterator after lower must point to a key greater than `key`.
-    // Note: if this assert fails, then it may indicate that the comparator does
-    // not meet the equivalence requirements for Compare
-    // (see https://en.cppreference.com/w/cpp/named_req/Compare).
-    assert(next == end() || compare_keys(key, next.key()));
-    return {lower, next};
-  }
-  // Try once more to avoid the call to upper_bound() if there's only one
-  // equivalent key. This should prevent all calls to upper_bound() in cases of
-  // unique-containers with heterogeneous comparators in which all comparison
-  // operators have the same equivalence classes.
-  if (next == end() || compare_keys(key, next.key())) return {lower, next};
-
-  // In this case, we need to call upper_bound() to avoid worst case O(N)
-  // behavior if we were to iterate over equal keys.
-  return {lower, upper_bound(key)};
-}
-
-template <typename P>
-template <typename K, typename... Args>
-auto btree<P>::insert_unique(const K &key, Args &&... args)
-    -> std::pair<iterator, bool> {
-  if (empty()) {
-    mutable_root() = rightmost_ = new_leaf_root_node(1);
-  }
-
-  SearchResult<iterator, is_key_compare_to::value> res = internal_locate(key);
-  iterator iter = res.value;
-
-  if (res.HasMatch()) {
-    if (res.IsEq()) {
-      // The key already exists in the tree, do nothing.
-      return {iter, false};
-    }
-  } else {
-    iterator last = internal_last(iter);
-    if (last.node && !compare_keys(key, last.key())) {
-      // The key already exists in the tree, do nothing.
-      return {last, false};
-    }
-  }
-  return {internal_emplace(iter, std::forward<Args>(args)...), true};
-}
-
-template <typename P>
-template <typename K, typename... Args>
-inline auto btree<P>::insert_hint_unique(iterator position, const K &key,
-                                         Args &&... args)
-    -> std::pair<iterator, bool> {
-  if (!empty()) {
-    if (position == end() || compare_keys(key, position.key())) {
-      if (position == begin() || compare_keys(std::prev(position).key(), key)) {
-        // prev.key() < key < position.key()
-        return {internal_emplace(position, std::forward<Args>(args)...), true};
-      }
-    } else if (compare_keys(position.key(), key)) {
-      ++position;
-      if (position == end() || compare_keys(key, position.key())) {
-        // {original `position`}.key() < key < {current `position`}.key()
-        return {internal_emplace(position, std::forward<Args>(args)...), true};
-      }
-    } else {
-      // position.key() == key
-      return {position, false};
-    }
-  }
-  return insert_unique(key, std::forward<Args>(args)...);
-}
-
-template <typename P>
-template <typename InputIterator, typename>
-void btree<P>::insert_iterator_unique(InputIterator b, InputIterator e, int) {
-  for (; b != e; ++b) {
-    insert_hint_unique(end(), params_type::key(*b), *b);
-  }
-}
-
-template <typename P>
-template <typename InputIterator>
-void btree<P>::insert_iterator_unique(InputIterator b, InputIterator e, char) {
-  for (; b != e; ++b) {
-    init_type value(*b);
-    insert_hint_unique(end(), params_type::key(value), std::move(value));
-  }
-}
-
-template <typename P>
-template <typename ValueType>
-auto btree<P>::insert_multi(const key_type &key, ValueType &&v) -> iterator {
-  if (empty()) {
-    mutable_root() = rightmost_ = new_leaf_root_node(1);
-  }
-
-  iterator iter = internal_upper_bound(key);
-  if (iter.node == nullptr) {
-    iter = end();
-  }
-  return internal_emplace(iter, std::forward<ValueType>(v));
-}
-
-template <typename P>
-template <typename ValueType>
-auto btree<P>::insert_hint_multi(iterator position, ValueType &&v) -> iterator {
-  if (!empty()) {
-    const key_type &key = params_type::key(v);
-    if (position == end() || !compare_keys(position.key(), key)) {
-      if (position == begin() ||
-          !compare_keys(key, std::prev(position).key())) {
-        // prev.key() <= key <= position.key()
-        return internal_emplace(position, std::forward<ValueType>(v));
-      }
-    } else {
-      ++position;
-      if (position == end() || !compare_keys(position.key(), key)) {
-        // {original `position`}.key() < key < {current `position`}.key()
-        return internal_emplace(position, std::forward<ValueType>(v));
-      }
-    }
-  }
-  return insert_multi(std::forward<ValueType>(v));
-}
-
-template <typename P>
-template <typename InputIterator>
-void btree<P>::insert_iterator_multi(InputIterator b, InputIterator e) {
-  for (; b != e; ++b) {
-    insert_hint_multi(end(), *b);
-  }
-}
-
-template <typename P>
-auto btree<P>::operator=(const btree &other) -> btree & {
-  if (this != &other) {
-    clear();
-
-    *mutable_key_comp() = other.key_comp();
-    if (absl::allocator_traits<
-            allocator_type>::propagate_on_container_copy_assignment::value) {
-      *mutable_allocator() = other.allocator();
-    }
-
-    copy_or_move_values_in_order(other);
-  }
-  return *this;
-}
-
-template <typename P>
-auto btree<P>::operator=(btree &&other) noexcept -> btree & {
-  if (this != &other) {
-    clear();
-
-    using std::swap;
-    if (absl::allocator_traits<
-            allocator_type>::propagate_on_container_copy_assignment::value) {
-      // Note: `root_` also contains the allocator and the key comparator.
-      swap(root_, other.root_);
-      swap(rightmost_, other.rightmost_);
-      swap(size_, other.size_);
-    } else {
-      if (allocator() == other.allocator()) {
-        swap(mutable_root(), other.mutable_root());
-        swap(*mutable_key_comp(), *other.mutable_key_comp());
-        swap(rightmost_, other.rightmost_);
-        swap(size_, other.size_);
-      } else {
-        // We aren't allowed to propagate the allocator and the allocator is
-        // different so we can't take over its memory. We must move each element
-        // individually. We need both `other` and `this` to have `other`s key
-        // comparator while moving the values so we can't swap the key
-        // comparators.
-        *mutable_key_comp() = other.key_comp();
-        copy_or_move_values_in_order(other);
-      }
-    }
-  }
-  return *this;
-}
-
-template <typename P>
-auto btree<P>::erase(iterator iter) -> iterator {
-  bool internal_delete = false;
-  if (!iter.node->leaf()) {
-    // Deletion of a value on an internal node. First, move the largest value
-    // from our left child here, then delete that position (in remove_values()
-    // below). We can get to the largest value from our left child by
-    // decrementing iter.
-    iterator internal_iter(iter);
-    --iter;
-    assert(iter.node->leaf());
-    params_type::move(mutable_allocator(), iter.node->slot(iter.position),
-                      internal_iter.node->slot(internal_iter.position));
-    internal_delete = true;
-  }
-
-  // Delete the key from the leaf.
-  iter.node->remove_values(iter.position, /*to_erase=*/1, mutable_allocator());
-  --size_;
-
-  // We want to return the next value after the one we just erased. If we
-  // erased from an internal node (internal_delete == true), then the next
-  // value is ++(++iter). If we erased from a leaf node (internal_delete ==
-  // false) then the next value is ++iter. Note that ++iter may point to an
-  // internal node and the value in the internal node may move to a leaf node
-  // (iter.node) when rebalancing is performed at the leaf level.
-
-  iterator res = rebalance_after_delete(iter);
-
-  // If we erased from an internal node, advance the iterator.
-  if (internal_delete) {
-    ++res;
-  }
-  return res;
-}
-
-template <typename P>
-auto btree<P>::rebalance_after_delete(iterator iter) -> iterator {
-  // Merge/rebalance as we walk back up the tree.
-  iterator res(iter);
-  bool first_iteration = true;
-  for (;;) {
-    if (iter.node == root()) {
-      try_shrink();
-      if (empty()) {
-        return end();
-      }
-      break;
-    }
-    if (iter.node->count() >= kMinNodeValues) {
-      break;
-    }
-    bool merged = try_merge_or_rebalance(&iter);
-    // On the first iteration, we should update `res` with `iter` because `res`
-    // may have been invalidated.
-    if (first_iteration) {
-      res = iter;
-      first_iteration = false;
-    }
-    if (!merged) {
-      break;
-    }
-    iter.position = iter.node->position();
-    iter.node = iter.node->parent();
-  }
-
-  // Adjust our return value. If we're pointing at the end of a node, advance
-  // the iterator.
-  if (res.position == res.node->finish()) {
-    res.position = res.node->finish() - 1;
-    ++res;
-  }
-
-  return res;
-}
-
-template <typename P>
-auto btree<P>::erase_range(iterator begin, iterator end)
-    -> std::pair<size_type, iterator> {
-  difference_type count = std::distance(begin, end);
-  assert(count >= 0);
-
-  if (count == 0) {
-    return {0, begin};
-  }
-
-  if (count == size_) {
-    clear();
-    return {count, this->end()};
-  }
-
-  if (begin.node == end.node) {
-    assert(end.position > begin.position);
-    begin.node->remove_values(begin.position, end.position - begin.position,
-                              mutable_allocator());
-    size_ -= count;
-    return {count, rebalance_after_delete(begin)};
-  }
-
-  const size_type target_size = size_ - count;
-  while (size_ > target_size) {
-    if (begin.node->leaf()) {
-      const size_type remaining_to_erase = size_ - target_size;
-      const size_type remaining_in_node = begin.node->finish() - begin.position;
-      const size_type to_erase =
-          (std::min)(remaining_to_erase, remaining_in_node);
-      begin.node->remove_values(begin.position, to_erase, mutable_allocator());
-      size_ -= to_erase;
-      begin = rebalance_after_delete(begin);
-    } else {
-      begin = erase(begin);
-    }
-  }
-  return {count, begin};
-}
-
-template <typename P>
-void btree<P>::clear() {
-  if (!empty()) {
-    node_type::clear_and_delete(root(), mutable_allocator());
-  }
-  mutable_root() = EmptyNode();
-  rightmost_ = EmptyNode();
-  size_ = 0;
-}
-
-template <typename P>
-void btree<P>::swap(btree &other) {
-  using std::swap;
-  if (absl::allocator_traits<
-          allocator_type>::propagate_on_container_swap::value) {
-    // Note: `root_` also contains the allocator and the key comparator.
-    swap(root_, other.root_);
-  } else {
-    // It's undefined behavior if the allocators are unequal here.
-    assert(allocator() == other.allocator());
-    swap(mutable_root(), other.mutable_root());
-    swap(*mutable_key_comp(), *other.mutable_key_comp());
-  }
-  swap(rightmost_, other.rightmost_);
-  swap(size_, other.size_);
-}
-
-template <typename P>
-void btree<P>::verify() const {
-  assert(root() != nullptr);
-  assert(leftmost() != nullptr);
-  assert(rightmost_ != nullptr);
-  assert(empty() || size() == internal_verify(root(), nullptr, nullptr));
-  assert(leftmost() == (++const_iterator(root(), -1)).node);
-  assert(rightmost_ == (--const_iterator(root(), root()->finish())).node);
-  assert(leftmost()->leaf());
-  assert(rightmost_->leaf());
-}
-
-template <typename P>
-void btree<P>::rebalance_or_split(iterator *iter) {
-  node_type *&node = iter->node;
-  int &insert_position = iter->position;
-  assert(node->count() == node->max_count());
-  assert(kNodeValues == node->max_count());
-
-  // First try to make room on the node by rebalancing.
-  node_type *parent = node->parent();
-  if (node != root()) {
-    if (node->position() > parent->start()) {
-      // Try rebalancing with our left sibling.
-      node_type *left = parent->child(node->position() - 1);
-      assert(left->max_count() == kNodeValues);
-      if (left->count() < kNodeValues) {
-        // We bias rebalancing based on the position being inserted. If we're
-        // inserting at the end of the right node then we bias rebalancing to
-        // fill up the left node.
-        int to_move = (kNodeValues - left->count()) /
-                      (1 + (insert_position < static_cast<int>(kNodeValues)));
-        to_move = (std::max)(1, to_move);
-
-        if (insert_position - to_move >= node->start() ||
-            left->count() + to_move < static_cast<int>(kNodeValues)) {
-          left->rebalance_right_to_left(to_move, node, mutable_allocator());
-
-          assert(node->max_count() - node->count() == to_move);
-          insert_position = insert_position - to_move;
-          if (insert_position < node->start()) {
-            insert_position = insert_position + left->count() + 1;
-            node = left;
-          }
-
-          assert(node->count() < node->max_count());
-          return;
-        }
-      }
-    }
-
-    if (node->position() < parent->finish()) {
-      // Try rebalancing with our right sibling.
-      node_type *right = parent->child(node->position() + 1);
-      assert(right->max_count() == kNodeValues);
-      if (right->count() < kNodeValues) {
-        // We bias rebalancing based on the position being inserted. If we're
-        // inserting at the beginning of the left node then we bias rebalancing
-        // to fill up the right node.
-        int to_move = (static_cast<int>(kNodeValues) - right->count()) /
-                      (1 + (insert_position > node->start()));
-        to_move = (std::max)(1, to_move);
-
-        if (insert_position <= node->finish() - to_move ||
-            right->count() + to_move < static_cast<int>(kNodeValues)) {
-          node->rebalance_left_to_right(to_move, right, mutable_allocator());
-
-          if (insert_position > node->finish()) {
-            insert_position = insert_position - node->count() - 1;
-            node = right;
-          }
-
-          assert(node->count() < node->max_count());
-          return;
-        }
-      }
-    }
-
-    // Rebalancing failed, make sure there is room on the parent node for a new
-    // value.
-    assert(parent->max_count() == kNodeValues);
-    if (parent->count() == kNodeValues) {
-      iterator parent_iter(node->parent(), node->position());
-      rebalance_or_split(&parent_iter);
-    }
-  } else {
-    // Rebalancing not possible because this is the root node.
-    // Create a new root node and set the current root node as the child of the
-    // new root.
-    parent = new_internal_node(parent);
-    parent->init_child(parent->start(), root());
-    mutable_root() = parent;
-    // If the former root was a leaf node, then it's now the rightmost node.
-    assert(!parent->start_child()->leaf() ||
-           parent->start_child() == rightmost_);
-  }
-
-  // Split the node.
-  node_type *split_node;
-  if (node->leaf()) {
-    split_node = new_leaf_node(parent);
-    node->split(insert_position, split_node, mutable_allocator());
-    if (rightmost_ == node) rightmost_ = split_node;
-  } else {
-    split_node = new_internal_node(parent);
-    node->split(insert_position, split_node, mutable_allocator());
-  }
-
-  if (insert_position > node->finish()) {
-    insert_position = insert_position - node->count() - 1;
-    node = split_node;
-  }
-}
-
-template <typename P>
-void btree<P>::merge_nodes(node_type *left, node_type *right) {
-  left->merge(right, mutable_allocator());
-  if (rightmost_ == right) rightmost_ = left;
-}
-
-template <typename P>
-bool btree<P>::try_merge_or_rebalance(iterator *iter) {
-  node_type *parent = iter->node->parent();
-  if (iter->node->position() > parent->start()) {
-    // Try merging with our left sibling.
-    node_type *left = parent->child(iter->node->position() - 1);
-    assert(left->max_count() == kNodeValues);
-    if (1U + left->count() + iter->node->count() <= kNodeValues) {
-      iter->position += 1 + left->count();
-      merge_nodes(left, iter->node);
-      iter->node = left;
-      return true;
-    }
-  }
-  if (iter->node->position() < parent->finish()) {
-    // Try merging with our right sibling.
-    node_type *right = parent->child(iter->node->position() + 1);
-    assert(right->max_count() == kNodeValues);
-    if (1U + iter->node->count() + right->count() <= kNodeValues) {
-      merge_nodes(iter->node, right);
-      return true;
-    }
-    // Try rebalancing with our right sibling. We don't perform rebalancing if
-    // we deleted the first element from iter->node and the node is not
-    // empty. This is a small optimization for the common pattern of deleting
-    // from the front of the tree.
-    if (right->count() > kMinNodeValues &&
-        (iter->node->count() == 0 || iter->position > iter->node->start())) {
-      int to_move = (right->count() - iter->node->count()) / 2;
-      to_move = (std::min)(to_move, right->count() - 1);
-      iter->node->rebalance_right_to_left(to_move, right, mutable_allocator());
-      return false;
-    }
-  }
-  if (iter->node->position() > parent->start()) {
-    // Try rebalancing with our left sibling. We don't perform rebalancing if
-    // we deleted the last element from iter->node and the node is not
-    // empty. This is a small optimization for the common pattern of deleting
-    // from the back of the tree.
-    node_type *left = parent->child(iter->node->position() - 1);
-    if (left->count() > kMinNodeValues &&
-        (iter->node->count() == 0 || iter->position < iter->node->finish())) {
-      int to_move = (left->count() - iter->node->count()) / 2;
-      to_move = (std::min)(to_move, left->count() - 1);
-      left->rebalance_left_to_right(to_move, iter->node, mutable_allocator());
-      iter->position += to_move;
-      return false;
-    }
-  }
-  return false;
-}
-
-template <typename P>
-void btree<P>::try_shrink() {
-  node_type *orig_root = root();
-  if (orig_root->count() > 0) {
-    return;
-  }
-  // Deleted the last item on the root node, shrink the height of the tree.
-  if (orig_root->leaf()) {
-    assert(size() == 0);
-    mutable_root() = rightmost_ = EmptyNode();
-  } else {
-    node_type *child = orig_root->start_child();
-    child->make_root();
-    mutable_root() = child;
-  }
-  node_type::clear_and_delete(orig_root, mutable_allocator());
-}
-
-template <typename P>
-template <typename IterType>
-inline IterType btree<P>::internal_last(IterType iter) {
-  assert(iter.node != nullptr);
-  while (iter.position == iter.node->finish()) {
-    iter.position = iter.node->position();
-    iter.node = iter.node->parent();
-    if (iter.node->leaf()) {
-      iter.node = nullptr;
-      break;
-    }
-  }
-  return iter;
-}
-
-template <typename P>
-template <typename... Args>
-inline auto btree<P>::internal_emplace(iterator iter, Args &&... args)
-    -> iterator {
-  if (!iter.node->leaf()) {
-    // We can't insert on an internal node. Instead, we'll insert after the
-    // previous value which is guaranteed to be on a leaf node.
-    --iter;
-    ++iter.position;
-  }
-  const field_type max_count = iter.node->max_count();
-  allocator_type *alloc = mutable_allocator();
-  if (iter.node->count() == max_count) {
-    // Make room in the leaf for the new item.
-    if (max_count < kNodeValues) {
-      // Insertion into the root where the root is smaller than the full node
-      // size. Simply grow the size of the root node.
-      assert(iter.node == root());
-      iter.node =
-          new_leaf_root_node((std::min<int>)(kNodeValues, 2 * max_count));
-      // Transfer the values from the old root to the new root.
-      node_type *old_root = root();
-      node_type *new_root = iter.node;
-      new_root->transfer_n(old_root->count(), new_root->start(),
-                           old_root->start(), old_root, alloc);
-      new_root->set_finish(old_root->finish());
-      old_root->set_finish(old_root->start());
-      node_type::clear_and_delete(old_root, alloc);
-      mutable_root() = rightmost_ = new_root;
-    } else {
-      rebalance_or_split(&iter);
-    }
-  }
-  iter.node->emplace_value(iter.position, alloc, std::forward<Args>(args)...);
-  ++size_;
-  return iter;
-}
-
-template <typename P>
-template <typename K>
-inline auto btree<P>::internal_locate(const K &key) const
-    -> SearchResult<iterator, is_key_compare_to::value> {
-  iterator iter(const_cast<node_type *>(root()));
-  for (;;) {
-    SearchResult<int, is_key_compare_to::value> res =
-        iter.node->lower_bound(key, key_comp());
-    iter.position = res.value;
-    if (res.IsEq()) {
-      return {iter, MatchKind::kEq};
-    }
-    // Note: in the non-key-compare-to case, we don't need to walk all the way
-    // down the tree if the keys are equal, but determining equality would
-    // require doing an extra comparison on each node on the way down, and we
-    // will need to go all the way to the leaf node in the expected case.
-    if (iter.node->leaf()) {
-      break;
-    }
-    iter.node = iter.node->child(iter.position);
-  }
-  // Note: in the non-key-compare-to case, the key may actually be equivalent
-  // here (and the MatchKind::kNe is ignored).
-  return {iter, MatchKind::kNe};
-}
-
-template <typename P>
-template <typename K>
-auto btree<P>::internal_lower_bound(const K &key) const
-    -> SearchResult<iterator, is_key_compare_to::value> {
-  if (!params_type::template can_have_multiple_equivalent_keys<K>()) {
-    SearchResult<iterator, is_key_compare_to::value> ret = internal_locate(key);
-    ret.value = internal_last(ret.value);
-    return ret;
-  }
-  iterator iter(const_cast<node_type *>(root()));
-  SearchResult<int, is_key_compare_to::value> res;
-  bool seen_eq = false;
-  for (;;) {
-    res = iter.node->lower_bound(key, key_comp());
-    iter.position = res.value;
-    if (iter.node->leaf()) {
-      break;
-    }
-    seen_eq = seen_eq || res.IsEq();
-    iter.node = iter.node->child(iter.position);
-  }
-  if (res.IsEq()) return {iter, MatchKind::kEq};
-  return {internal_last(iter), seen_eq ? MatchKind::kEq : MatchKind::kNe};
-}
-
-template <typename P>
-template <typename K>
-auto btree<P>::internal_upper_bound(const K &key) const -> iterator {
-  iterator iter(const_cast<node_type *>(root()));
-  for (;;) {
-    iter.position = iter.node->upper_bound(key, key_comp());
-    if (iter.node->leaf()) {
-      break;
-    }
-    iter.node = iter.node->child(iter.position);
-  }
-  return internal_last(iter);
-}
-
-template <typename P>
-template <typename K>
-auto btree<P>::internal_find(const K &key) const -> iterator {
-  SearchResult<iterator, is_key_compare_to::value> res = internal_locate(key);
-  if (res.HasMatch()) {
-    if (res.IsEq()) {
-      return res.value;
-    }
-  } else {
-    const iterator iter = internal_last(res.value);
-    if (iter.node != nullptr && !compare_keys(key, iter.key())) {
-      return iter;
-    }
-  }
-  return {nullptr, 0};
-}
-
-template <typename P>
-int btree<P>::internal_verify(const node_type *node, const key_type *lo,
-                              const key_type *hi) const {
-  assert(node->count() > 0);
-  assert(node->count() <= node->max_count());
-  if (lo) {
-    assert(!compare_keys(node->key(node->start()), *lo));
-  }
-  if (hi) {
-    assert(!compare_keys(*hi, node->key(node->finish() - 1)));
-  }
-  for (int i = node->start() + 1; i < node->finish(); ++i) {
-    assert(!compare_keys(node->key(i), node->key(i - 1)));
-  }
-  int count = node->count();
-  if (!node->leaf()) {
-    for (int i = node->start(); i <= node->finish(); ++i) {
-      assert(node->child(i) != nullptr);
-      assert(node->child(i)->parent() == node);
-      assert(node->child(i)->position() == i);
-      count += internal_verify(node->child(i),
-                               i == node->start() ? lo : &node->key(i - 1),
-                               i == node->finish() ? hi : &node->key(i));
-    }
-  }
-  return count;
-}
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_BTREE_H_
diff --git a/third_party/abseil/absl/container/internal/btree_container.h b/third_party/abseil/absl/container/internal/btree_container.h
deleted file mode 100644
index 03be708..0000000
--- a/third_party/abseil/absl/container/internal/btree_container.h
+++ /dev/null
@@ -1,682 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_BTREE_CONTAINER_H_
-#define ABSL_CONTAINER_INTERNAL_BTREE_CONTAINER_H_
-
-#include <algorithm>
-#include <initializer_list>
-#include <iterator>
-#include <utility>
-
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/container/internal/btree.h"  // IWYU pragma: export
-#include "absl/container/internal/common.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// A common base class for btree_set, btree_map, btree_multiset, and
-// btree_multimap.
-template <typename Tree>
-class btree_container {
-  using params_type = typename Tree::params_type;
-
- protected:
-  // Alias used for heterogeneous lookup functions.
-  // `key_arg<K>` evaluates to `K` when the functors are transparent and to
-  // `key_type` otherwise. It permits template argument deduction on `K` for the
-  // transparent case.
-  template <class K>
-  using key_arg =
-      typename KeyArg<IsTransparent<typename Tree::key_compare>::value>::
-          template type<K, typename Tree::key_type>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using value_type = typename Tree::value_type;
-  using size_type = typename Tree::size_type;
-  using difference_type = typename Tree::difference_type;
-  using key_compare = typename Tree::key_compare;
-  using value_compare = typename Tree::value_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using reference = typename Tree::reference;
-  using const_reference = typename Tree::const_reference;
-  using pointer = typename Tree::pointer;
-  using const_pointer = typename Tree::const_pointer;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-  using reverse_iterator = typename Tree::reverse_iterator;
-  using const_reverse_iterator = typename Tree::const_reverse_iterator;
-  using node_type = typename Tree::node_handle_type;
-
-  // Constructors/assignments.
-  btree_container() : tree_(key_compare(), allocator_type()) {}
-  explicit btree_container(const key_compare &comp,
-                           const allocator_type &alloc = allocator_type())
-      : tree_(comp, alloc) {}
-  explicit btree_container(const allocator_type &alloc)
-      : tree_(key_compare(), alloc) {}
-
-  btree_container(const btree_container &other)
-      : btree_container(other, absl::allocator_traits<allocator_type>::
-                                   select_on_container_copy_construction(
-                                       other.get_allocator())) {}
-  btree_container(const btree_container &other, const allocator_type &alloc)
-      : tree_(other.tree_, alloc) {}
-
-  btree_container(btree_container &&other) noexcept(
-      std::is_nothrow_move_constructible<Tree>::value) = default;
-  btree_container(btree_container &&other, const allocator_type &alloc)
-      : tree_(std::move(other.tree_), alloc) {}
-
-  btree_container &operator=(const btree_container &other) = default;
-  btree_container &operator=(btree_container &&other) noexcept(
-      std::is_nothrow_move_assignable<Tree>::value) = default;
-
-  // Iterator routines.
-  iterator begin() { return tree_.begin(); }
-  const_iterator begin() const { return tree_.begin(); }
-  const_iterator cbegin() const { return tree_.begin(); }
-  iterator end() { return tree_.end(); }
-  const_iterator end() const { return tree_.end(); }
-  const_iterator cend() const { return tree_.end(); }
-  reverse_iterator rbegin() { return tree_.rbegin(); }
-  const_reverse_iterator rbegin() const { return tree_.rbegin(); }
-  const_reverse_iterator crbegin() const { return tree_.rbegin(); }
-  reverse_iterator rend() { return tree_.rend(); }
-  const_reverse_iterator rend() const { return tree_.rend(); }
-  const_reverse_iterator crend() const { return tree_.rend(); }
-
-  // Lookup routines.
-  template <typename K = key_type>
-  size_type count(const key_arg<K> &key) const {
-    auto equal_range = this->equal_range(key);
-    return std::distance(equal_range.first, equal_range.second);
-  }
-  template <typename K = key_type>
-  iterator find(const key_arg<K> &key) {
-    return tree_.find(key);
-  }
-  template <typename K = key_type>
-  const_iterator find(const key_arg<K> &key) const {
-    return tree_.find(key);
-  }
-  template <typename K = key_type>
-  bool contains(const key_arg<K> &key) const {
-    return find(key) != end();
-  }
-  template <typename K = key_type>
-  iterator lower_bound(const key_arg<K> &key) {
-    return tree_.lower_bound(key);
-  }
-  template <typename K = key_type>
-  const_iterator lower_bound(const key_arg<K> &key) const {
-    return tree_.lower_bound(key);
-  }
-  template <typename K = key_type>
-  iterator upper_bound(const key_arg<K> &key) {
-    return tree_.upper_bound(key);
-  }
-  template <typename K = key_type>
-  const_iterator upper_bound(const key_arg<K> &key) const {
-    return tree_.upper_bound(key);
-  }
-  template <typename K = key_type>
-  std::pair<iterator, iterator> equal_range(const key_arg<K> &key) {
-    return tree_.equal_range(key);
-  }
-  template <typename K = key_type>
-  std::pair<const_iterator, const_iterator> equal_range(
-      const key_arg<K> &key) const {
-    return tree_.equal_range(key);
-  }
-
-  // Deletion routines. Note that there is also a deletion routine that is
-  // specific to btree_set_container/btree_multiset_container.
-
-  // Erase the specified iterator from the btree. The iterator must be valid
-  // (i.e. not equal to end()).  Return an iterator pointing to the node after
-  // the one that was erased (or end() if none exists).
-  iterator erase(const_iterator iter) { return tree_.erase(iterator(iter)); }
-  iterator erase(iterator iter) { return tree_.erase(iter); }
-  iterator erase(const_iterator first, const_iterator last) {
-    return tree_.erase_range(iterator(first), iterator(last)).second;
-  }
-  template <typename K = key_type>
-  size_type erase(const key_arg<K> &key) {
-    auto equal_range = this->equal_range(key);
-    return tree_.erase_range(equal_range.first, equal_range.second).first;
-  }
-
-  // Extract routines.
-  node_type extract(iterator position) {
-    // Use Move instead of Transfer, because the rebalancing code expects to
-    // have a valid object to scribble metadata bits on top of.
-    auto node = CommonAccess::Move<node_type>(get_allocator(), position.slot());
-    erase(position);
-    return node;
-  }
-  node_type extract(const_iterator position) {
-    return extract(iterator(position));
-  }
-
-  // Utility routines.
-  void clear() { tree_.clear(); }
-  void swap(btree_container &other) { tree_.swap(other.tree_); }
-  void verify() const { tree_.verify(); }
-
-  // Size routines.
-  size_type size() const { return tree_.size(); }
-  size_type max_size() const { return tree_.max_size(); }
-  bool empty() const { return tree_.empty(); }
-
-  friend bool operator==(const btree_container &x, const btree_container &y) {
-    if (x.size() != y.size()) return false;
-    return std::equal(x.begin(), x.end(), y.begin());
-  }
-
-  friend bool operator!=(const btree_container &x, const btree_container &y) {
-    return !(x == y);
-  }
-
-  friend bool operator<(const btree_container &x, const btree_container &y) {
-    return std::lexicographical_compare(x.begin(), x.end(), y.begin(), y.end());
-  }
-
-  friend bool operator>(const btree_container &x, const btree_container &y) {
-    return y < x;
-  }
-
-  friend bool operator<=(const btree_container &x, const btree_container &y) {
-    return !(y < x);
-  }
-
-  friend bool operator>=(const btree_container &x, const btree_container &y) {
-    return !(x < y);
-  }
-
-  // The allocator used by the btree.
-  allocator_type get_allocator() const { return tree_.get_allocator(); }
-
-  // The key comparator used by the btree.
-  key_compare key_comp() const { return tree_.key_comp(); }
-  value_compare value_comp() const { return tree_.value_comp(); }
-
-  // Support absl::Hash.
-  template <typename State>
-  friend State AbslHashValue(State h, const btree_container &b) {
-    for (const auto &v : b) {
-      h = State::combine(std::move(h), v);
-    }
-    return State::combine(std::move(h), b.size());
-  }
-
- protected:
-  Tree tree_;
-};
-
-// A common base class for btree_set and btree_map.
-template <typename Tree>
-class btree_set_container : public btree_container<Tree> {
-  using super_type = btree_container<Tree>;
-  using params_type = typename Tree::params_type;
-  using init_type = typename params_type::init_type;
-  using is_key_compare_to = typename params_type::is_key_compare_to;
-  friend class BtreeNodePeer;
-
- protected:
-  template <class K>
-  using key_arg = typename super_type::template key_arg<K>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using value_type = typename Tree::value_type;
-  using size_type = typename Tree::size_type;
-  using key_compare = typename Tree::key_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-  using node_type = typename super_type::node_type;
-  using insert_return_type = InsertReturnType<iterator, node_type>;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_set_container() {}
-
-  // Range constructors.
-  template <class InputIterator>
-  btree_set_container(InputIterator b, InputIterator e,
-                      const key_compare &comp = key_compare(),
-                      const allocator_type &alloc = allocator_type())
-      : super_type(comp, alloc) {
-    insert(b, e);
-  }
-  template <class InputIterator>
-  btree_set_container(InputIterator b, InputIterator e,
-                      const allocator_type &alloc)
-      : btree_set_container(b, e, key_compare(), alloc) {}
-
-  // Initializer list constructors.
-  btree_set_container(std::initializer_list<init_type> init,
-                      const key_compare &comp = key_compare(),
-                      const allocator_type &alloc = allocator_type())
-      : btree_set_container(init.begin(), init.end(), comp, alloc) {}
-  btree_set_container(std::initializer_list<init_type> init,
-                      const allocator_type &alloc)
-      : btree_set_container(init.begin(), init.end(), alloc) {}
-
-  // Insertion routines.
-  std::pair<iterator, bool> insert(const value_type &v) {
-    return this->tree_.insert_unique(params_type::key(v), v);
-  }
-  std::pair<iterator, bool> insert(value_type &&v) {
-    return this->tree_.insert_unique(params_type::key(v), std::move(v));
-  }
-  template <typename... Args>
-  std::pair<iterator, bool> emplace(Args &&... args) {
-    init_type v(std::forward<Args>(args)...);
-    return this->tree_.insert_unique(params_type::key(v), std::move(v));
-  }
-  iterator insert(const_iterator hint, const value_type &v) {
-    return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), v)
-        .first;
-  }
-  iterator insert(const_iterator hint, value_type &&v) {
-    return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), std::move(v))
-        .first;
-  }
-  template <typename... Args>
-  iterator emplace_hint(const_iterator hint, Args &&... args) {
-    init_type v(std::forward<Args>(args)...);
-    return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), std::move(v))
-        .first;
-  }
-  template <typename InputIterator>
-  void insert(InputIterator b, InputIterator e) {
-    this->tree_.insert_iterator_unique(b, e, 0);
-  }
-  void insert(std::initializer_list<init_type> init) {
-    this->tree_.insert_iterator_unique(init.begin(), init.end(), 0);
-  }
-  insert_return_type insert(node_type &&node) {
-    if (!node) return {this->end(), false, node_type()};
-    std::pair<iterator, bool> res =
-        this->tree_.insert_unique(params_type::key(CommonAccess::GetSlot(node)),
-                                  CommonAccess::GetSlot(node));
-    if (res.second) {
-      CommonAccess::Destroy(&node);
-      return {res.first, true, node_type()};
-    } else {
-      return {res.first, false, std::move(node)};
-    }
-  }
-  iterator insert(const_iterator hint, node_type &&node) {
-    if (!node) return this->end();
-    std::pair<iterator, bool> res = this->tree_.insert_hint_unique(
-        iterator(hint), params_type::key(CommonAccess::GetSlot(node)),
-        CommonAccess::GetSlot(node));
-    if (res.second) CommonAccess::Destroy(&node);
-    return res.first;
-  }
-
-  // Node extraction routines.
-  template <typename K = key_type>
-  node_type extract(const key_arg<K> &key) {
-    const std::pair<iterator, bool> lower_and_equal =
-        this->tree_.lower_bound_equal(key);
-    return lower_and_equal.second ? extract(lower_and_equal.first)
-                                  : node_type();
-  }
-  using super_type::extract;
-
-  // Merge routines.
-  // Moves elements from `src` into `this`. If the element already exists in
-  // `this`, it is left unmodified in `src`.
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &src) {  // NOLINT
-    for (auto src_it = src.begin(); src_it != src.end();) {
-      if (insert(std::move(params_type::element(src_it.slot()))).second) {
-        src_it = src.erase(src_it);
-      } else {
-        ++src_it;
-      }
-    }
-  }
-
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &&src) {
-    merge(src);
-  }
-};
-
-// Base class for btree_map.
-template <typename Tree>
-class btree_map_container : public btree_set_container<Tree> {
-  using super_type = btree_set_container<Tree>;
-  using params_type = typename Tree::params_type;
-  friend class BtreeNodePeer;
-
- private:
-  template <class K>
-  using key_arg = typename super_type::template key_arg<K>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using mapped_type = typename params_type::mapped_type;
-  using value_type = typename Tree::value_type;
-  using key_compare = typename Tree::key_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_map_container() {}
-
-  // Insertion routines.
-  // Note: the nullptr template arguments and extra `const M&` overloads allow
-  // for supporting bitfield arguments.
-  template <typename K = key_type, class M>
-  std::pair<iterator, bool> insert_or_assign(const key_arg<K> &k,
-                                             const M &obj) {
-    return insert_or_assign_impl(k, obj);
-  }
-  template <typename K = key_type, class M, K * = nullptr>
-  std::pair<iterator, bool> insert_or_assign(key_arg<K> &&k, const M &obj) {
-    return insert_or_assign_impl(std::forward<K>(k), obj);
-  }
-  template <typename K = key_type, class M, M * = nullptr>
-  std::pair<iterator, bool> insert_or_assign(const key_arg<K> &k, M &&obj) {
-    return insert_or_assign_impl(k, std::forward<M>(obj));
-  }
-  template <typename K = key_type, class M, K * = nullptr, M * = nullptr>
-  std::pair<iterator, bool> insert_or_assign(key_arg<K> &&k, M &&obj) {
-    return insert_or_assign_impl(std::forward<K>(k), std::forward<M>(obj));
-  }
-  template <typename K = key_type, class M>
-  iterator insert_or_assign(const_iterator hint, const key_arg<K> &k,
-                            const M &obj) {
-    return insert_or_assign_hint_impl(hint, k, obj);
-  }
-  template <typename K = key_type, class M, K * = nullptr>
-  iterator insert_or_assign(const_iterator hint, key_arg<K> &&k, const M &obj) {
-    return insert_or_assign_hint_impl(hint, std::forward<K>(k), obj);
-  }
-  template <typename K = key_type, class M, M * = nullptr>
-  iterator insert_or_assign(const_iterator hint, const key_arg<K> &k, M &&obj) {
-    return insert_or_assign_hint_impl(hint, k, std::forward<M>(obj));
-  }
-  template <typename K = key_type, class M, K * = nullptr, M * = nullptr>
-  iterator insert_or_assign(const_iterator hint, key_arg<K> &&k, M &&obj) {
-    return insert_or_assign_hint_impl(hint, std::forward<K>(k),
-                                      std::forward<M>(obj));
-  }
-
-  template <typename K = key_type, typename... Args,
-            typename absl::enable_if_t<
-                !std::is_convertible<K, const_iterator>::value, int> = 0>
-  std::pair<iterator, bool> try_emplace(const key_arg<K> &k, Args &&... args) {
-    return try_emplace_impl(k, std::forward<Args>(args)...);
-  }
-  template <typename K = key_type, typename... Args,
-            typename absl::enable_if_t<
-                !std::is_convertible<K, const_iterator>::value, int> = 0>
-  std::pair<iterator, bool> try_emplace(key_arg<K> &&k, Args &&... args) {
-    return try_emplace_impl(std::forward<K>(k), std::forward<Args>(args)...);
-  }
-  template <typename K = key_type, typename... Args>
-  iterator try_emplace(const_iterator hint, const key_arg<K> &k,
-                       Args &&... args) {
-    return try_emplace_hint_impl(hint, k, std::forward<Args>(args)...);
-  }
-  template <typename K = key_type, typename... Args>
-  iterator try_emplace(const_iterator hint, key_arg<K> &&k, Args &&... args) {
-    return try_emplace_hint_impl(hint, std::forward<K>(k),
-                                 std::forward<Args>(args)...);
-  }
-
-  template <typename K = key_type>
-  mapped_type &operator[](const key_arg<K> &k) {
-    return try_emplace(k).first->second;
-  }
-  template <typename K = key_type>
-  mapped_type &operator[](key_arg<K> &&k) {
-    return try_emplace(std::forward<K>(k)).first->second;
-  }
-
-  template <typename K = key_type>
-  mapped_type &at(const key_arg<K> &key) {
-    auto it = this->find(key);
-    if (it == this->end())
-      base_internal::ThrowStdOutOfRange("absl::btree_map::at");
-    return it->second;
-  }
-  template <typename K = key_type>
-  const mapped_type &at(const key_arg<K> &key) const {
-    auto it = this->find(key);
-    if (it == this->end())
-      base_internal::ThrowStdOutOfRange("absl::btree_map::at");
-    return it->second;
-  }
-
- private:
-  // Note: when we call `std::forward<M>(obj)` twice, it's safe because
-  // insert_unique/insert_hint_unique are guaranteed to not consume `obj` when
-  // `ret.second` is false.
-  template <class K, class M>
-  std::pair<iterator, bool> insert_or_assign_impl(K &&k, M &&obj) {
-    const std::pair<iterator, bool> ret =
-        this->tree_.insert_unique(k, std::forward<K>(k), std::forward<M>(obj));
-    if (!ret.second) ret.first->second = std::forward<M>(obj);
-    return ret;
-  }
-  template <class K, class M>
-  iterator insert_or_assign_hint_impl(const_iterator hint, K &&k, M &&obj) {
-    const std::pair<iterator, bool> ret = this->tree_.insert_hint_unique(
-        iterator(hint), k, std::forward<K>(k), std::forward<M>(obj));
-    if (!ret.second) ret.first->second = std::forward<M>(obj);
-    return ret.first;
-  }
-
-  template <class K, class... Args>
-  std::pair<iterator, bool> try_emplace_impl(K &&k, Args &&... args) {
-    return this->tree_.insert_unique(
-        k, std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)),
-        std::forward_as_tuple(std::forward<Args>(args)...));
-  }
-  template <class K, class... Args>
-  iterator try_emplace_hint_impl(const_iterator hint, K &&k, Args &&... args) {
-    return this->tree_
-        .insert_hint_unique(iterator(hint), k, std::piecewise_construct,
-                            std::forward_as_tuple(std::forward<K>(k)),
-                            std::forward_as_tuple(std::forward<Args>(args)...))
-        .first;
-  }
-};
-
-// A common base class for btree_multiset and btree_multimap.
-template <typename Tree>
-class btree_multiset_container : public btree_container<Tree> {
-  using super_type = btree_container<Tree>;
-  using params_type = typename Tree::params_type;
-  using init_type = typename params_type::init_type;
-  using is_key_compare_to = typename params_type::is_key_compare_to;
-
-  template <class K>
-  using key_arg = typename super_type::template key_arg<K>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using value_type = typename Tree::value_type;
-  using size_type = typename Tree::size_type;
-  using key_compare = typename Tree::key_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-  using node_type = typename super_type::node_type;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_multiset_container() {}
-
-  // Range constructors.
-  template <class InputIterator>
-  btree_multiset_container(InputIterator b, InputIterator e,
-                           const key_compare &comp = key_compare(),
-                           const allocator_type &alloc = allocator_type())
-      : super_type(comp, alloc) {
-    insert(b, e);
-  }
-  template <class InputIterator>
-  btree_multiset_container(InputIterator b, InputIterator e,
-                           const allocator_type &alloc)
-      : btree_multiset_container(b, e, key_compare(), alloc) {}
-
-  // Initializer list constructors.
-  btree_multiset_container(std::initializer_list<init_type> init,
-                           const key_compare &comp = key_compare(),
-                           const allocator_type &alloc = allocator_type())
-      : btree_multiset_container(init.begin(), init.end(), comp, alloc) {}
-  btree_multiset_container(std::initializer_list<init_type> init,
-                           const allocator_type &alloc)
-      : btree_multiset_container(init.begin(), init.end(), alloc) {}
-
-  // Insertion routines.
-  iterator insert(const value_type &v) { return this->tree_.insert_multi(v); }
-  iterator insert(value_type &&v) {
-    return this->tree_.insert_multi(std::move(v));
-  }
-  iterator insert(const_iterator hint, const value_type &v) {
-    return this->tree_.insert_hint_multi(iterator(hint), v);
-  }
-  iterator insert(const_iterator hint, value_type &&v) {
-    return this->tree_.insert_hint_multi(iterator(hint), std::move(v));
-  }
-  template <typename InputIterator>
-  void insert(InputIterator b, InputIterator e) {
-    this->tree_.insert_iterator_multi(b, e);
-  }
-  void insert(std::initializer_list<init_type> init) {
-    this->tree_.insert_iterator_multi(init.begin(), init.end());
-  }
-  template <typename... Args>
-  iterator emplace(Args &&... args) {
-    return this->tree_.insert_multi(init_type(std::forward<Args>(args)...));
-  }
-  template <typename... Args>
-  iterator emplace_hint(const_iterator hint, Args &&... args) {
-    return this->tree_.insert_hint_multi(
-        iterator(hint), init_type(std::forward<Args>(args)...));
-  }
-  iterator insert(node_type &&node) {
-    if (!node) return this->end();
-    iterator res =
-        this->tree_.insert_multi(params_type::key(CommonAccess::GetSlot(node)),
-                                 CommonAccess::GetSlot(node));
-    CommonAccess::Destroy(&node);
-    return res;
-  }
-  iterator insert(const_iterator hint, node_type &&node) {
-    if (!node) return this->end();
-    iterator res = this->tree_.insert_hint_multi(
-        iterator(hint),
-        std::move(params_type::element(CommonAccess::GetSlot(node))));
-    CommonAccess::Destroy(&node);
-    return res;
-  }
-
-  // Node extraction routines.
-  template <typename K = key_type>
-  node_type extract(const key_arg<K> &key) {
-    const std::pair<iterator, bool> lower_and_equal =
-        this->tree_.lower_bound_equal(key);
-    return lower_and_equal.second ? extract(lower_and_equal.first)
-                                  : node_type();
-  }
-  using super_type::extract;
-
-  // Merge routines.
-  // Moves all elements from `src` into `this`.
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &src) {  // NOLINT
-    for (auto src_it = src.begin(), end = src.end(); src_it != end; ++src_it) {
-      insert(std::move(params_type::element(src_it.slot())));
-    }
-    src.clear();
-  }
-
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &&src) {
-    merge(src);
-  }
-};
-
-// A base class for btree_multimap.
-template <typename Tree>
-class btree_multimap_container : public btree_multiset_container<Tree> {
-  using super_type = btree_multiset_container<Tree>;
-  using params_type = typename Tree::params_type;
-
- public:
-  using mapped_type = typename params_type::mapped_type;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_multimap_container() {}
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_BTREE_CONTAINER_H_
diff --git a/third_party/abseil/absl/container/internal/common.h b/third_party/abseil/absl/container/internal/common.h
deleted file mode 100644
index 030e9d4..0000000
--- a/third_party/abseil/absl/container/internal/common.h
+++ /dev/null
@@ -1,206 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_CONTAINER_H_
-#define ABSL_CONTAINER_INTERNAL_CONTAINER_H_
-
-#include <cassert>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class, class = void>
-struct IsTransparent : std::false_type {};
-template <class T>
-struct IsTransparent<T, absl::void_t<typename T::is_transparent>>
-    : std::true_type {};
-
-template <bool is_transparent>
-struct KeyArg {
-  // Transparent. Forward `K`.
-  template <typename K, typename key_type>
-  using type = K;
-};
-
-template <>
-struct KeyArg<false> {
-  // Not transparent. Always use `key_type`.
-  template <typename K, typename key_type>
-  using type = key_type;
-};
-
-// The node_handle concept from C++17.
-// We specialize node_handle for sets and maps. node_handle_base holds the
-// common API of both.
-template <typename PolicyTraits, typename Alloc>
-class node_handle_base {
- protected:
-  using slot_type = typename PolicyTraits::slot_type;
-
- public:
-  using allocator_type = Alloc;
-
-  constexpr node_handle_base() = default;
-  node_handle_base(node_handle_base&& other) noexcept {
-    *this = std::move(other);
-  }
-  ~node_handle_base() { destroy(); }
-  node_handle_base& operator=(node_handle_base&& other) noexcept {
-    destroy();
-    if (!other.empty()) {
-      alloc_ = other.alloc_;
-      PolicyTraits::transfer(alloc(), slot(), other.slot());
-      other.reset();
-    }
-    return *this;
-  }
-
-  bool empty() const noexcept { return !alloc_; }
-  explicit operator bool() const noexcept { return !empty(); }
-  allocator_type get_allocator() const { return *alloc_; }
-
- protected:
-  friend struct CommonAccess;
-
-  struct transfer_tag_t {};
-  node_handle_base(transfer_tag_t, const allocator_type& a, slot_type* s)
-      : alloc_(a) {
-    PolicyTraits::transfer(alloc(), slot(), s);
-  }
-
-  struct move_tag_t {};
-  node_handle_base(move_tag_t, const allocator_type& a, slot_type* s)
-      : alloc_(a) {
-    PolicyTraits::construct(alloc(), slot(), s);
-  }
-
-  void destroy() {
-    if (!empty()) {
-      PolicyTraits::destroy(alloc(), slot());
-      reset();
-    }
-  }
-
-  void reset() {
-    assert(alloc_.has_value());
-    alloc_ = absl::nullopt;
-  }
-
-  slot_type* slot() const {
-    assert(!empty());
-    return reinterpret_cast<slot_type*>(std::addressof(slot_space_));
-  }
-  allocator_type* alloc() { return std::addressof(*alloc_); }
-
- private:
-  absl::optional<allocator_type> alloc_ = {};
-  alignas(slot_type) mutable unsigned char slot_space_[sizeof(slot_type)] = {};
-};
-
-// For sets.
-template <typename Policy, typename PolicyTraits, typename Alloc,
-          typename = void>
-class node_handle : public node_handle_base<PolicyTraits, Alloc> {
-  using Base = node_handle_base<PolicyTraits, Alloc>;
-
- public:
-  using value_type = typename PolicyTraits::value_type;
-
-  constexpr node_handle() {}
-
-  value_type& value() const { return PolicyTraits::element(this->slot()); }
-
- private:
-  friend struct CommonAccess;
-
-  using Base::Base;
-};
-
-// For maps.
-template <typename Policy, typename PolicyTraits, typename Alloc>
-class node_handle<Policy, PolicyTraits, Alloc,
-                  absl::void_t<typename Policy::mapped_type>>
-    : public node_handle_base<PolicyTraits, Alloc> {
-  using Base = node_handle_base<PolicyTraits, Alloc>;
-  using slot_type = typename PolicyTraits::slot_type;
-
- public:
-  using key_type = typename Policy::key_type;
-  using mapped_type = typename Policy::mapped_type;
-
-  constexpr node_handle() {}
-
-  // When C++17 is available, we can use std::launder to provide mutable
-  // access to the key. Otherwise, we provide const access.
-  auto key() const
-      -> decltype(PolicyTraits::mutable_key(std::declval<slot_type*>())) {
-    return PolicyTraits::mutable_key(this->slot());
-  }
-
-  mapped_type& mapped() const {
-    return PolicyTraits::value(&PolicyTraits::element(this->slot()));
-  }
-
- private:
-  friend struct CommonAccess;
-
-  using Base::Base;
-};
-
-// Provide access to non-public node-handle functions.
-struct CommonAccess {
-  template <typename Node>
-  static auto GetSlot(const Node& node) -> decltype(node.slot()) {
-    return node.slot();
-  }
-
-  template <typename Node>
-  static void Destroy(Node* node) {
-    node->destroy();
-  }
-
-  template <typename Node>
-  static void Reset(Node* node) {
-    node->reset();
-  }
-
-  template <typename T, typename... Args>
-  static T Transfer(Args&&... args) {
-    return T(typename T::transfer_tag_t{}, std::forward<Args>(args)...);
-  }
-
-  template <typename T, typename... Args>
-  static T Move(Args&&... args) {
-    return T(typename T::move_tag_t{}, std::forward<Args>(args)...);
-  }
-};
-
-// Implement the insert_return_type<> concept of C++17.
-template <class Iterator, class NodeType>
-struct InsertReturnType {
-  Iterator position;
-  bool inserted;
-  NodeType node;
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_CONTAINER_H_
diff --git a/third_party/abseil/absl/container/internal/compressed_tuple.h b/third_party/abseil/absl/container/internal/compressed_tuple.h
deleted file mode 100644
index 5ebe164..0000000
--- a/third_party/abseil/absl/container/internal/compressed_tuple.h
+++ /dev/null
@@ -1,290 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Helper class to perform the Empty Base Optimization.
-// Ts can contain classes and non-classes, empty or not. For the ones that
-// are empty classes, we perform the optimization. If all types in Ts are empty
-// classes, then CompressedTuple<Ts...> is itself an empty class.
-//
-// To access the members, use member get<N>() function.
-//
-// Eg:
-//   absl::container_internal::CompressedTuple<int, T1, T2, T3> value(7, t1, t2,
-//                                                                    t3);
-//   assert(value.get<0>() == 7);
-//   T1& t1 = value.get<1>();
-//   const T2& t2 = value.get<2>();
-//   ...
-//
-// https://en.cppreference.com/w/cpp/language/ebo
-
-#ifndef ABSL_CONTAINER_INTERNAL_COMPRESSED_TUPLE_H_
-#define ABSL_CONTAINER_INTERNAL_COMPRESSED_TUPLE_H_
-
-#include <initializer_list>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/utility/utility.h"
-
-#if defined(_MSC_VER) && !defined(__NVCC__)
-// We need to mark these classes with this declspec to ensure that
-// CompressedTuple happens.
-#define ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC __declspec(empty_bases)
-#else
-#define ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <typename... Ts>
-class CompressedTuple;
-
-namespace internal_compressed_tuple {
-
-template <typename D, size_t I>
-struct Elem;
-template <typename... B, size_t I>
-struct Elem<CompressedTuple<B...>, I>
-    : std::tuple_element<I, std::tuple<B...>> {};
-template <typename D, size_t I>
-using ElemT = typename Elem<D, I>::type;
-
-// Use the __is_final intrinsic if available. Where it's not available, classes
-// declared with the 'final' specifier cannot be used as CompressedTuple
-// elements.
-// TODO(sbenza): Replace this with std::is_final in C++14.
-template <typename T>
-constexpr bool IsFinal() {
-#if defined(__clang__) || defined(__GNUC__)
-  return __is_final(T);
-#else
-  return false;
-#endif
-}
-
-// We can't use EBCO on other CompressedTuples because that would mean that we
-// derive from multiple Storage<> instantiations with the same I parameter,
-// and potentially from multiple identical Storage<> instantiations.  So anytime
-// we use type inheritance rather than encapsulation, we mark
-// CompressedTupleImpl, to make this easy to detect.
-struct uses_inheritance {};
-
-template <typename T>
-constexpr bool ShouldUseBase() {
-  return std::is_class<T>::value && std::is_empty<T>::value && !IsFinal<T>() &&
-         !std::is_base_of<uses_inheritance, T>::value;
-}
-
-// The storage class provides two specializations:
-//  - For empty classes, it stores T as a base class.
-//  - For everything else, it stores T as a member.
-template <typename T, size_t I,
-#if defined(_MSC_VER)
-          bool UseBase =
-              ShouldUseBase<typename std::enable_if<true, T>::type>()>
-#else
-          bool UseBase = ShouldUseBase<T>()>
-#endif
-struct Storage {
-  T value;
-  constexpr Storage() = default;
-  template <typename V>
-  explicit constexpr Storage(absl::in_place_t, V&& v)
-      : value(absl::forward<V>(v)) {}
-  constexpr const T& get() const& { return value; }
-  T& get() & { return value; }
-  constexpr const T&& get() const&& { return absl::move(*this).value; }
-  T&& get() && { return std::move(*this).value; }
-};
-
-template <typename T, size_t I>
-struct ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC Storage<T, I, true> : T {
-  constexpr Storage() = default;
-
-  template <typename V>
-  explicit constexpr Storage(absl::in_place_t, V&& v)
-      : T(absl::forward<V>(v)) {}
-
-  constexpr const T& get() const& { return *this; }
-  T& get() & { return *this; }
-  constexpr const T&& get() const&& { return absl::move(*this); }
-  T&& get() && { return std::move(*this); }
-};
-
-template <typename D, typename I, bool ShouldAnyUseBase>
-struct ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC CompressedTupleImpl;
-
-template <typename... Ts, size_t... I, bool ShouldAnyUseBase>
-struct ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC CompressedTupleImpl<
-    CompressedTuple<Ts...>, absl::index_sequence<I...>, ShouldAnyUseBase>
-    // We use the dummy identity function through std::integral_constant to
-    // convince MSVC of accepting and expanding I in that context. Without it
-    // you would get:
-    //   error C3548: 'I': parameter pack cannot be used in this context
-    : uses_inheritance,
-      Storage<Ts, std::integral_constant<size_t, I>::value>... {
-  constexpr CompressedTupleImpl() = default;
-  template <typename... Vs>
-  explicit constexpr CompressedTupleImpl(absl::in_place_t, Vs&&... args)
-      : Storage<Ts, I>(absl::in_place, absl::forward<Vs>(args))... {}
-  friend CompressedTuple<Ts...>;
-};
-
-template <typename... Ts, size_t... I>
-struct ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC CompressedTupleImpl<
-    CompressedTuple<Ts...>, absl::index_sequence<I...>, false>
-    // We use the dummy identity function as above...
-    : Storage<Ts, std::integral_constant<size_t, I>::value, false>... {
-  constexpr CompressedTupleImpl() = default;
-  template <typename... Vs>
-  explicit constexpr CompressedTupleImpl(absl::in_place_t, Vs&&... args)
-      : Storage<Ts, I, false>(absl::in_place, absl::forward<Vs>(args))... {}
-  friend CompressedTuple<Ts...>;
-};
-
-std::false_type Or(std::initializer_list<std::false_type>);
-std::true_type Or(std::initializer_list<bool>);
-
-// MSVC requires this to be done separately rather than within the declaration
-// of CompressedTuple below.
-template <typename... Ts>
-constexpr bool ShouldAnyUseBase() {
-  return decltype(
-      Or({std::integral_constant<bool, ShouldUseBase<Ts>()>()...})){};
-}
-
-template <typename T, typename V>
-using TupleElementMoveConstructible =
-    typename std::conditional<std::is_reference<T>::value,
-                              std::is_convertible<V, T>,
-                              std::is_constructible<T, V&&>>::type;
-
-template <bool SizeMatches, class T, class... Vs>
-struct TupleMoveConstructible : std::false_type {};
-
-template <class... Ts, class... Vs>
-struct TupleMoveConstructible<true, CompressedTuple<Ts...>, Vs...>
-    : std::integral_constant<
-          bool, absl::conjunction<
-                    TupleElementMoveConstructible<Ts, Vs&&>...>::value> {};
-
-template <typename T>
-struct compressed_tuple_size;
-
-template <typename... Es>
-struct compressed_tuple_size<CompressedTuple<Es...>>
-    : public std::integral_constant<std::size_t, sizeof...(Es)> {};
-
-template <class T, class... Vs>
-struct TupleItemsMoveConstructible
-    : std::integral_constant<
-          bool, TupleMoveConstructible<compressed_tuple_size<T>::value ==
-                                           sizeof...(Vs),
-                                       T, Vs...>::value> {};
-
-}  // namespace internal_compressed_tuple
-
-// Helper class to perform the Empty Base Class Optimization.
-// Ts can contain classes and non-classes, empty or not. For the ones that
-// are empty classes, we perform the CompressedTuple. If all types in Ts are
-// empty classes, then CompressedTuple<Ts...> is itself an empty class.  (This
-// does not apply when one or more of those empty classes is itself an empty
-// CompressedTuple.)
-//
-// To access the members, use member .get<N>() function.
-//
-// Eg:
-//   absl::container_internal::CompressedTuple<int, T1, T2, T3> value(7, t1, t2,
-//                                                                    t3);
-//   assert(value.get<0>() == 7);
-//   T1& t1 = value.get<1>();
-//   const T2& t2 = value.get<2>();
-//   ...
-//
-// https://en.cppreference.com/w/cpp/language/ebo
-template <typename... Ts>
-class ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC CompressedTuple
-    : private internal_compressed_tuple::CompressedTupleImpl<
-          CompressedTuple<Ts...>, absl::index_sequence_for<Ts...>,
-          internal_compressed_tuple::ShouldAnyUseBase<Ts...>()> {
- private:
-  template <int I>
-  using ElemT = internal_compressed_tuple::ElemT<CompressedTuple, I>;
-
-  template <int I>
-  using StorageT = internal_compressed_tuple::Storage<ElemT<I>, I>;
-
- public:
-  // There seems to be a bug in MSVC dealing in which using '=default' here will
-  // cause the compiler to ignore the body of other constructors. The work-
-  // around is to explicitly implement the default constructor.
-#if defined(_MSC_VER)
-  constexpr CompressedTuple() : CompressedTuple::CompressedTupleImpl() {}
-#else
-  constexpr CompressedTuple() = default;
-#endif
-  explicit constexpr CompressedTuple(const Ts&... base)
-      : CompressedTuple::CompressedTupleImpl(absl::in_place, base...) {}
-
-  template <typename First, typename... Vs,
-            absl::enable_if_t<
-                absl::conjunction<
-                    // Ensure we are not hiding default copy/move constructors.
-                    absl::negation<std::is_same<void(CompressedTuple),
-                                                void(absl::decay_t<First>)>>,
-                    internal_compressed_tuple::TupleItemsMoveConstructible<
-                        CompressedTuple<Ts...>, First, Vs...>>::value,
-                bool> = true>
-  explicit constexpr CompressedTuple(First&& first, Vs&&... base)
-      : CompressedTuple::CompressedTupleImpl(absl::in_place,
-                                             absl::forward<First>(first),
-                                             absl::forward<Vs>(base)...) {}
-
-  template <int I>
-  ElemT<I>& get() & {
-    return StorageT<I>::get();
-  }
-
-  template <int I>
-  constexpr const ElemT<I>& get() const& {
-    return StorageT<I>::get();
-  }
-
-  template <int I>
-  ElemT<I>&& get() && {
-    return std::move(*this).StorageT<I>::get();
-  }
-
-  template <int I>
-  constexpr const ElemT<I>&& get() const&& {
-    return absl::move(*this).StorageT<I>::get();
-  }
-};
-
-// Explicit specialization for a zero-element tuple
-// (needed to avoid ambiguous overloads for the default constructor).
-template <>
-class ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC CompressedTuple<> {};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC
-
-#endif  // ABSL_CONTAINER_INTERNAL_COMPRESSED_TUPLE_H_
diff --git a/third_party/abseil/absl/container/internal/compressed_tuple_test.cc b/third_party/abseil/absl/container/internal/compressed_tuple_test.cc
deleted file mode 100644
index 62a7483..0000000
--- a/third_party/abseil/absl/container/internal/compressed_tuple_test.cc
+++ /dev/null
@@ -1,409 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/compressed_tuple.h"
-
-#include <memory>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/test_instance_tracker.h"
-#include "absl/memory/memory.h"
-#include "absl/types/any.h"
-#include "absl/types/optional.h"
-#include "absl/utility/utility.h"
-
-// These are declared at global scope purely so that error messages
-// are smaller and easier to understand.
-enum class CallType { kConstRef, kConstMove };
-
-template <int>
-struct Empty {
-  constexpr CallType value() const& { return CallType::kConstRef; }
-  constexpr CallType value() const&& { return CallType::kConstMove; }
-};
-
-template <typename T>
-struct NotEmpty {
-  T value;
-};
-
-template <typename T, typename U>
-struct TwoValues {
-  T value1;
-  U value2;
-};
-
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using absl::test_internal::CopyableMovableInstance;
-using absl::test_internal::InstanceTracker;
-
-TEST(CompressedTupleTest, Sizeof) {
-  EXPECT_EQ(sizeof(int), sizeof(CompressedTuple<int>));
-  EXPECT_EQ(sizeof(int), sizeof(CompressedTuple<int, Empty<0>>));
-  EXPECT_EQ(sizeof(int), sizeof(CompressedTuple<int, Empty<0>, Empty<1>>));
-  EXPECT_EQ(sizeof(int),
-            sizeof(CompressedTuple<int, Empty<0>, Empty<1>, Empty<2>>));
-
-  EXPECT_EQ(sizeof(TwoValues<int, double>),
-            sizeof(CompressedTuple<int, NotEmpty<double>>));
-  EXPECT_EQ(sizeof(TwoValues<int, double>),
-            sizeof(CompressedTuple<int, Empty<0>, NotEmpty<double>>));
-  EXPECT_EQ(sizeof(TwoValues<int, double>),
-            sizeof(CompressedTuple<int, Empty<0>, NotEmpty<double>, Empty<1>>));
-}
-
-TEST(CompressedTupleTest, OneMoveOnRValueConstructionTemp) {
-  InstanceTracker tracker;
-  CompressedTuple<CopyableMovableInstance> x1(CopyableMovableInstance(1));
-  EXPECT_EQ(tracker.instances(), 1);
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_LE(tracker.moves(), 1);
-  EXPECT_EQ(x1.get<0>().value(), 1);
-}
-
-TEST(CompressedTupleTest, OneMoveOnRValueConstructionMove) {
-  InstanceTracker tracker;
-
-  CopyableMovableInstance i1(1);
-  CompressedTuple<CopyableMovableInstance> x1(std::move(i1));
-  EXPECT_EQ(tracker.instances(), 2);
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_LE(tracker.moves(), 1);
-  EXPECT_EQ(x1.get<0>().value(), 1);
-}
-
-TEST(CompressedTupleTest, OneMoveOnRValueConstructionMixedTypes) {
-  InstanceTracker tracker;
-  CopyableMovableInstance i1(1);
-  CopyableMovableInstance i2(2);
-  Empty<0> empty;
-  CompressedTuple<CopyableMovableInstance, CopyableMovableInstance&, Empty<0>>
-      x1(std::move(i1), i2, empty);
-  EXPECT_EQ(x1.get<0>().value(), 1);
-  EXPECT_EQ(x1.get<1>().value(), 2);
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 1);
-}
-
-struct IncompleteType;
-CompressedTuple<CopyableMovableInstance, IncompleteType&, Empty<0>>
-MakeWithIncomplete(CopyableMovableInstance i1,
-                   IncompleteType& t,  // NOLINT
-                   Empty<0> empty) {
-  return CompressedTuple<CopyableMovableInstance, IncompleteType&, Empty<0>>{
-      std::move(i1), t, empty};
-}
-
-struct IncompleteType {};
-TEST(CompressedTupleTest, OneMoveOnRValueConstructionWithIncompleteType) {
-  InstanceTracker tracker;
-  CopyableMovableInstance i1(1);
-  Empty<0> empty;
-  struct DerivedType : IncompleteType {int value = 0;};
-  DerivedType fd;
-  fd.value = 7;
-
-  CompressedTuple<CopyableMovableInstance, IncompleteType&, Empty<0>> x1 =
-      MakeWithIncomplete(std::move(i1), fd, empty);
-
-  EXPECT_EQ(x1.get<0>().value(), 1);
-  EXPECT_EQ(static_cast<DerivedType&>(x1.get<1>()).value, 7);
-
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 2);
-}
-
-TEST(CompressedTupleTest,
-     OneMoveOnRValueConstructionMixedTypes_BraceInitPoisonPillExpected) {
-  InstanceTracker tracker;
-  CopyableMovableInstance i1(1);
-  CopyableMovableInstance i2(2);
-  CompressedTuple<CopyableMovableInstance, CopyableMovableInstance&, Empty<0>>
-      x1(std::move(i1), i2, {});  // NOLINT
-  EXPECT_EQ(x1.get<0>().value(), 1);
-  EXPECT_EQ(x1.get<1>().value(), 2);
-  EXPECT_EQ(tracker.instances(), 3);
-  // We are forced into the `const Ts&...` constructor (invoking copies)
-  // because we need it to deduce the type of `{}`.
-  // std::tuple also has this behavior.
-  // Note, this test is proof that this is expected behavior, but it is not
-  // _desired_ behavior.
-  EXPECT_EQ(tracker.copies(), 1);
-  EXPECT_EQ(tracker.moves(), 0);
-}
-
-TEST(CompressedTupleTest, OneCopyOnLValueConstruction) {
-  InstanceTracker tracker;
-  CopyableMovableInstance i1(1);
-
-  CompressedTuple<CopyableMovableInstance> x1(i1);
-  EXPECT_EQ(tracker.copies(), 1);
-  EXPECT_EQ(tracker.moves(), 0);
-
-  tracker.ResetCopiesMovesSwaps();
-
-  CopyableMovableInstance i2(2);
-  const CopyableMovableInstance& i2_ref = i2;
-  CompressedTuple<CopyableMovableInstance> x2(i2_ref);
-  EXPECT_EQ(tracker.copies(), 1);
-  EXPECT_EQ(tracker.moves(), 0);
-}
-
-TEST(CompressedTupleTest, OneMoveOnRValueAccess) {
-  InstanceTracker tracker;
-  CopyableMovableInstance i1(1);
-  CompressedTuple<CopyableMovableInstance> x(std::move(i1));
-  tracker.ResetCopiesMovesSwaps();
-
-  CopyableMovableInstance i2 = std::move(x).get<0>();
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 1);
-}
-
-TEST(CompressedTupleTest, OneCopyOnLValueAccess) {
-  InstanceTracker tracker;
-
-  CompressedTuple<CopyableMovableInstance> x(CopyableMovableInstance(0));
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 1);
-
-  CopyableMovableInstance t = x.get<0>();
-  EXPECT_EQ(tracker.copies(), 1);
-  EXPECT_EQ(tracker.moves(), 1);
-}
-
-TEST(CompressedTupleTest, ZeroCopyOnRefAccess) {
-  InstanceTracker tracker;
-
-  CompressedTuple<CopyableMovableInstance> x(CopyableMovableInstance(0));
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 1);
-
-  CopyableMovableInstance& t1 = x.get<0>();
-  const CopyableMovableInstance& t2 = x.get<0>();
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 1);
-  EXPECT_EQ(t1.value(), 0);
-  EXPECT_EQ(t2.value(), 0);
-}
-
-TEST(CompressedTupleTest, Access) {
-  struct S {
-    std::string x;
-  };
-  CompressedTuple<int, Empty<0>, S> x(7, {}, S{"ABC"});
-  EXPECT_EQ(sizeof(x), sizeof(TwoValues<int, S>));
-  EXPECT_EQ(7, x.get<0>());
-  EXPECT_EQ("ABC", x.get<2>().x);
-}
-
-TEST(CompressedTupleTest, NonClasses) {
-  CompressedTuple<int, const char*> x(7, "ABC");
-  EXPECT_EQ(7, x.get<0>());
-  EXPECT_STREQ("ABC", x.get<1>());
-}
-
-TEST(CompressedTupleTest, MixClassAndNonClass) {
-  CompressedTuple<int, const char*, Empty<0>, NotEmpty<double>> x(7, "ABC", {},
-                                                                  {1.25});
-  struct Mock {
-    int v;
-    const char* p;
-    double d;
-  };
-  EXPECT_EQ(sizeof(x), sizeof(Mock));
-  EXPECT_EQ(7, x.get<0>());
-  EXPECT_STREQ("ABC", x.get<1>());
-  EXPECT_EQ(1.25, x.get<3>().value);
-}
-
-TEST(CompressedTupleTest, Nested) {
-  CompressedTuple<int, CompressedTuple<int>,
-                  CompressedTuple<int, CompressedTuple<int>>>
-      x(1, CompressedTuple<int>(2),
-        CompressedTuple<int, CompressedTuple<int>>(3, CompressedTuple<int>(4)));
-  EXPECT_EQ(1, x.get<0>());
-  EXPECT_EQ(2, x.get<1>().get<0>());
-  EXPECT_EQ(3, x.get<2>().get<0>());
-  EXPECT_EQ(4, x.get<2>().get<1>().get<0>());
-
-  CompressedTuple<Empty<0>, Empty<0>,
-                  CompressedTuple<Empty<0>, CompressedTuple<Empty<0>>>>
-      y;
-  std::set<Empty<0>*> empties{&y.get<0>(), &y.get<1>(), &y.get<2>().get<0>(),
-                              &y.get<2>().get<1>().get<0>()};
-#ifdef _MSC_VER
-  // MSVC has a bug where many instances of the same base class are layed out in
-  // the same address when using __declspec(empty_bases).
-  // This will be fixed in a future version of MSVC.
-  int expected = 1;
-#else
-  int expected = 4;
-#endif
-  EXPECT_EQ(expected, sizeof(y));
-  EXPECT_EQ(expected, empties.size());
-  EXPECT_EQ(sizeof(y), sizeof(Empty<0>) * empties.size());
-
-  EXPECT_EQ(4 * sizeof(char),
-            sizeof(CompressedTuple<CompressedTuple<char, char>,
-                                   CompressedTuple<char, char>>));
-  EXPECT_TRUE((std::is_empty<CompressedTuple<Empty<0>, Empty<1>>>::value));
-
-  // Make sure everything still works when things are nested.
-  struct CT_Empty : CompressedTuple<Empty<0>> {};
-  CompressedTuple<Empty<0>, CT_Empty> nested_empty;
-  auto contained = nested_empty.get<0>();
-  auto nested = nested_empty.get<1>().get<0>();
-  EXPECT_TRUE((std::is_same<decltype(contained), decltype(nested)>::value));
-}
-
-TEST(CompressedTupleTest, Reference) {
-  int i = 7;
-  std::string s = "Very long string that goes in the heap";
-  CompressedTuple<int, int&, std::string, std::string&> x(i, i, s, s);
-
-  // Sanity check. We should have not moved from `s`
-  EXPECT_EQ(s, "Very long string that goes in the heap");
-
-  EXPECT_EQ(x.get<0>(), x.get<1>());
-  EXPECT_NE(&x.get<0>(), &x.get<1>());
-  EXPECT_EQ(&x.get<1>(), &i);
-
-  EXPECT_EQ(x.get<2>(), x.get<3>());
-  EXPECT_NE(&x.get<2>(), &x.get<3>());
-  EXPECT_EQ(&x.get<3>(), &s);
-}
-
-TEST(CompressedTupleTest, NoElements) {
-  CompressedTuple<> x;
-  static_cast<void>(x);  // Silence -Wunused-variable.
-  EXPECT_TRUE(std::is_empty<CompressedTuple<>>::value);
-}
-
-TEST(CompressedTupleTest, MoveOnlyElements) {
-  CompressedTuple<std::unique_ptr<std::string>> str_tup(
-      absl::make_unique<std::string>("str"));
-
-  CompressedTuple<CompressedTuple<std::unique_ptr<std::string>>,
-                  std::unique_ptr<int>>
-  x(std::move(str_tup), absl::make_unique<int>(5));
-
-  EXPECT_EQ(*x.get<0>().get<0>(), "str");
-  EXPECT_EQ(*x.get<1>(), 5);
-
-  std::unique_ptr<std::string> x0 = std::move(x.get<0>()).get<0>();
-  std::unique_ptr<int> x1 = std::move(x).get<1>();
-
-  EXPECT_EQ(*x0, "str");
-  EXPECT_EQ(*x1, 5);
-}
-
-TEST(CompressedTupleTest, MoveConstructionMoveOnlyElements) {
-  CompressedTuple<std::unique_ptr<std::string>> base(
-      absl::make_unique<std::string>("str"));
-  EXPECT_EQ(*base.get<0>(), "str");
-
-  CompressedTuple<std::unique_ptr<std::string>> copy(std::move(base));
-  EXPECT_EQ(*copy.get<0>(), "str");
-}
-
-TEST(CompressedTupleTest, AnyElements) {
-  any a(std::string("str"));
-  CompressedTuple<any, any&> x(any(5), a);
-  EXPECT_EQ(absl::any_cast<int>(x.get<0>()), 5);
-  EXPECT_EQ(absl::any_cast<std::string>(x.get<1>()), "str");
-
-  a = 0.5f;
-  EXPECT_EQ(absl::any_cast<float>(x.get<1>()), 0.5);
-}
-
-TEST(CompressedTupleTest, Constexpr) {
-  struct NonTrivialStruct {
-    constexpr NonTrivialStruct() = default;
-    constexpr int value() const { return v; }
-    int v = 5;
-  };
-  struct TrivialStruct {
-    TrivialStruct() = default;
-    constexpr int value() const { return v; }
-    int v;
-  };
-  constexpr CompressedTuple<int, double, CompressedTuple<int>, Empty<0>> x(
-      7, 1.25, CompressedTuple<int>(5), {});
-  constexpr int x0 = x.get<0>();
-  constexpr double x1 = x.get<1>();
-  constexpr int x2 = x.get<2>().get<0>();
-  constexpr CallType x3 = x.get<3>().value();
-
-  EXPECT_EQ(x0, 7);
-  EXPECT_EQ(x1, 1.25);
-  EXPECT_EQ(x2, 5);
-  EXPECT_EQ(x3, CallType::kConstRef);
-
-#if !defined(__GNUC__) || defined(__clang__) || __GNUC__ > 4
-  constexpr CompressedTuple<Empty<0>, TrivialStruct, int> trivial = {};
-  constexpr CallType trivial0 = trivial.get<0>().value();
-  constexpr int trivial1 = trivial.get<1>().value();
-  constexpr int trivial2 = trivial.get<2>();
-
-  EXPECT_EQ(trivial0, CallType::kConstRef);
-  EXPECT_EQ(trivial1, 0);
-  EXPECT_EQ(trivial2, 0);
-#endif
-
-  constexpr CompressedTuple<Empty<0>, NonTrivialStruct, absl::optional<int>>
-      non_trivial = {};
-  constexpr CallType non_trivial0 = non_trivial.get<0>().value();
-  constexpr int non_trivial1 = non_trivial.get<1>().value();
-  constexpr absl::optional<int> non_trivial2 = non_trivial.get<2>();
-
-  EXPECT_EQ(non_trivial0, CallType::kConstRef);
-  EXPECT_EQ(non_trivial1, 5);
-  EXPECT_EQ(non_trivial2, absl::nullopt);
-
-  static constexpr char data[] = "DEF";
-  constexpr CompressedTuple<const char*> z(data);
-  constexpr const char* z1 = z.get<0>();
-  EXPECT_EQ(std::string(z1), std::string(data));
-
-#if defined(__clang__)
-  // An apparent bug in earlier versions of gcc claims these are ambiguous.
-  constexpr int x2m = absl::move(x.get<2>()).get<0>();
-  constexpr CallType x3m = absl::move(x).get<3>().value();
-  EXPECT_EQ(x2m, 5);
-  EXPECT_EQ(x3m, CallType::kConstMove);
-#endif
-}
-
-#if defined(__clang__) || defined(__GNUC__)
-TEST(CompressedTupleTest, EmptyFinalClass) {
-  struct S final {
-    int f() const { return 5; }
-  };
-  CompressedTuple<S> x;
-  EXPECT_EQ(x.get<0>().f(), 5);
-}
-#endif
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/container_memory.h b/third_party/abseil/absl/container/internal/container_memory.h
deleted file mode 100644
index e67529e..0000000
--- a/third_party/abseil/absl/container/internal/container_memory.h
+++ /dev/null
@@ -1,460 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_CONTAINER_MEMORY_H_
-#define ABSL_CONTAINER_INTERNAL_CONTAINER_MEMORY_H_
-
-#include <cassert>
-#include <cstddef>
-#include <memory>
-#include <new>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/utility/utility.h"
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-#include <sanitizer/asan_interface.h>
-#endif
-
-#ifdef ABSL_HAVE_MEMORY_SANITIZER
-#include <sanitizer/msan_interface.h>
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <size_t Alignment>
-struct alignas(Alignment) AlignedType {};
-
-// Allocates at least n bytes aligned to the specified alignment.
-// Alignment must be a power of 2. It must be positive.
-//
-// Note that many allocators don't honor alignment requirements above certain
-// threshold (usually either alignof(std::max_align_t) or alignof(void*)).
-// Allocate() doesn't apply alignment corrections. If the underlying allocator
-// returns insufficiently alignment pointer, that's what you are going to get.
-template <size_t Alignment, class Alloc>
-void* Allocate(Alloc* alloc, size_t n) {
-  static_assert(Alignment > 0, "");
-  assert(n && "n must be positive");
-  using M = AlignedType<Alignment>;
-  using A = typename absl::allocator_traits<Alloc>::template rebind_alloc<M>;
-  using AT = typename absl::allocator_traits<Alloc>::template rebind_traits<M>;
-  // On macOS, "mem_alloc" is a #define with one argument defined in
-  // rpc/types.h, so we can't name the variable "mem_alloc" and initialize it
-  // with the "foo(bar)" syntax.
-  A my_mem_alloc(*alloc);
-  void* p = AT::allocate(my_mem_alloc, (n + sizeof(M) - 1) / sizeof(M));
-  assert(reinterpret_cast<uintptr_t>(p) % Alignment == 0 &&
-         "allocator does not respect alignment");
-  return p;
-}
-
-// The pointer must have been previously obtained by calling
-// Allocate<Alignment>(alloc, n).
-template <size_t Alignment, class Alloc>
-void Deallocate(Alloc* alloc, void* p, size_t n) {
-  static_assert(Alignment > 0, "");
-  assert(n && "n must be positive");
-  using M = AlignedType<Alignment>;
-  using A = typename absl::allocator_traits<Alloc>::template rebind_alloc<M>;
-  using AT = typename absl::allocator_traits<Alloc>::template rebind_traits<M>;
-  // On macOS, "mem_alloc" is a #define with one argument defined in
-  // rpc/types.h, so we can't name the variable "mem_alloc" and initialize it
-  // with the "foo(bar)" syntax.
-  A my_mem_alloc(*alloc);
-  AT::deallocate(my_mem_alloc, static_cast<M*>(p),
-                 (n + sizeof(M) - 1) / sizeof(M));
-}
-
-namespace memory_internal {
-
-// Constructs T into uninitialized storage pointed by `ptr` using the args
-// specified in the tuple.
-template <class Alloc, class T, class Tuple, size_t... I>
-void ConstructFromTupleImpl(Alloc* alloc, T* ptr, Tuple&& t,
-                            absl::index_sequence<I...>) {
-  absl::allocator_traits<Alloc>::construct(
-      *alloc, ptr, std::get<I>(std::forward<Tuple>(t))...);
-}
-
-template <class T, class F>
-struct WithConstructedImplF {
-  template <class... Args>
-  decltype(std::declval<F>()(std::declval<T>())) operator()(
-      Args&&... args) const {
-    return std::forward<F>(f)(T(std::forward<Args>(args)...));
-  }
-  F&& f;
-};
-
-template <class T, class Tuple, size_t... Is, class F>
-decltype(std::declval<F>()(std::declval<T>())) WithConstructedImpl(
-    Tuple&& t, absl::index_sequence<Is...>, F&& f) {
-  return WithConstructedImplF<T, F>{std::forward<F>(f)}(
-      std::get<Is>(std::forward<Tuple>(t))...);
-}
-
-template <class T, size_t... Is>
-auto TupleRefImpl(T&& t, absl::index_sequence<Is...>)
-    -> decltype(std::forward_as_tuple(std::get<Is>(std::forward<T>(t))...)) {
-  return std::forward_as_tuple(std::get<Is>(std::forward<T>(t))...);
-}
-
-// Returns a tuple of references to the elements of the input tuple. T must be a
-// tuple.
-template <class T>
-auto TupleRef(T&& t) -> decltype(
-    TupleRefImpl(std::forward<T>(t),
-                 absl::make_index_sequence<
-                     std::tuple_size<typename std::decay<T>::type>::value>())) {
-  return TupleRefImpl(
-      std::forward<T>(t),
-      absl::make_index_sequence<
-          std::tuple_size<typename std::decay<T>::type>::value>());
-}
-
-template <class F, class K, class V>
-decltype(std::declval<F>()(std::declval<const K&>(), std::piecewise_construct,
-                           std::declval<std::tuple<K>>(), std::declval<V>()))
-DecomposePairImpl(F&& f, std::pair<std::tuple<K>, V> p) {
-  const auto& key = std::get<0>(p.first);
-  return std::forward<F>(f)(key, std::piecewise_construct, std::move(p.first),
-                            std::move(p.second));
-}
-
-}  // namespace memory_internal
-
-// Constructs T into uninitialized storage pointed by `ptr` using the args
-// specified in the tuple.
-template <class Alloc, class T, class Tuple>
-void ConstructFromTuple(Alloc* alloc, T* ptr, Tuple&& t) {
-  memory_internal::ConstructFromTupleImpl(
-      alloc, ptr, std::forward<Tuple>(t),
-      absl::make_index_sequence<
-          std::tuple_size<typename std::decay<Tuple>::type>::value>());
-}
-
-// Constructs T using the args specified in the tuple and calls F with the
-// constructed value.
-template <class T, class Tuple, class F>
-decltype(std::declval<F>()(std::declval<T>())) WithConstructed(
-    Tuple&& t, F&& f) {
-  return memory_internal::WithConstructedImpl<T>(
-      std::forward<Tuple>(t),
-      absl::make_index_sequence<
-          std::tuple_size<typename std::decay<Tuple>::type>::value>(),
-      std::forward<F>(f));
-}
-
-// Given arguments of an std::pair's consructor, PairArgs() returns a pair of
-// tuples with references to the passed arguments. The tuples contain
-// constructor arguments for the first and the second elements of the pair.
-//
-// The following two snippets are equivalent.
-//
-// 1. std::pair<F, S> p(args...);
-//
-// 2. auto a = PairArgs(args...);
-//    std::pair<F, S> p(std::piecewise_construct,
-//                      std::move(p.first), std::move(p.second));
-inline std::pair<std::tuple<>, std::tuple<>> PairArgs() { return {}; }
-template <class F, class S>
-std::pair<std::tuple<F&&>, std::tuple<S&&>> PairArgs(F&& f, S&& s) {
-  return {std::piecewise_construct, std::forward_as_tuple(std::forward<F>(f)),
-          std::forward_as_tuple(std::forward<S>(s))};
-}
-template <class F, class S>
-std::pair<std::tuple<const F&>, std::tuple<const S&>> PairArgs(
-    const std::pair<F, S>& p) {
-  return PairArgs(p.first, p.second);
-}
-template <class F, class S>
-std::pair<std::tuple<F&&>, std::tuple<S&&>> PairArgs(std::pair<F, S>&& p) {
-  return PairArgs(std::forward<F>(p.first), std::forward<S>(p.second));
-}
-template <class F, class S>
-auto PairArgs(std::piecewise_construct_t, F&& f, S&& s)
-    -> decltype(std::make_pair(memory_internal::TupleRef(std::forward<F>(f)),
-                               memory_internal::TupleRef(std::forward<S>(s)))) {
-  return std::make_pair(memory_internal::TupleRef(std::forward<F>(f)),
-                        memory_internal::TupleRef(std::forward<S>(s)));
-}
-
-// A helper function for implementing apply() in map policies.
-template <class F, class... Args>
-auto DecomposePair(F&& f, Args&&... args)
-    -> decltype(memory_internal::DecomposePairImpl(
-        std::forward<F>(f), PairArgs(std::forward<Args>(args)...))) {
-  return memory_internal::DecomposePairImpl(
-      std::forward<F>(f), PairArgs(std::forward<Args>(args)...));
-}
-
-// A helper function for implementing apply() in set policies.
-template <class F, class Arg>
-decltype(std::declval<F>()(std::declval<const Arg&>(), std::declval<Arg>()))
-DecomposeValue(F&& f, Arg&& arg) {
-  const auto& key = arg;
-  return std::forward<F>(f)(key, std::forward<Arg>(arg));
-}
-
-// Helper functions for asan and msan.
-inline void SanitizerPoisonMemoryRegion(const void* m, size_t s) {
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-  ASAN_POISON_MEMORY_REGION(m, s);
-#endif
-#ifdef ABSL_HAVE_MEMORY_SANITIZER
-  __msan_poison(m, s);
-#endif
-  (void)m;
-  (void)s;
-}
-
-inline void SanitizerUnpoisonMemoryRegion(const void* m, size_t s) {
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-  ASAN_UNPOISON_MEMORY_REGION(m, s);
-#endif
-#ifdef ABSL_HAVE_MEMORY_SANITIZER
-  __msan_unpoison(m, s);
-#endif
-  (void)m;
-  (void)s;
-}
-
-template <typename T>
-inline void SanitizerPoisonObject(const T* object) {
-  SanitizerPoisonMemoryRegion(object, sizeof(T));
-}
-
-template <typename T>
-inline void SanitizerUnpoisonObject(const T* object) {
-  SanitizerUnpoisonMemoryRegion(object, sizeof(T));
-}
-
-namespace memory_internal {
-
-// If Pair is a standard-layout type, OffsetOf<Pair>::kFirst and
-// OffsetOf<Pair>::kSecond are equivalent to offsetof(Pair, first) and
-// offsetof(Pair, second) respectively. Otherwise they are -1.
-//
-// The purpose of OffsetOf is to avoid calling offsetof() on non-standard-layout
-// type, which is non-portable.
-template <class Pair, class = std::true_type>
-struct OffsetOf {
-  static constexpr size_t kFirst = static_cast<size_t>(-1);
-  static constexpr size_t kSecond = static_cast<size_t>(-1);
-};
-
-template <class Pair>
-struct OffsetOf<Pair, typename std::is_standard_layout<Pair>::type> {
-  static constexpr size_t kFirst = offsetof(Pair, first);
-  static constexpr size_t kSecond = offsetof(Pair, second);
-};
-
-template <class K, class V>
-struct IsLayoutCompatible {
- private:
-  struct Pair {
-    K first;
-    V second;
-  };
-
-  // Is P layout-compatible with Pair?
-  template <class P>
-  static constexpr bool LayoutCompatible() {
-    return std::is_standard_layout<P>() && sizeof(P) == sizeof(Pair) &&
-           alignof(P) == alignof(Pair) &&
-           memory_internal::OffsetOf<P>::kFirst ==
-               memory_internal::OffsetOf<Pair>::kFirst &&
-           memory_internal::OffsetOf<P>::kSecond ==
-               memory_internal::OffsetOf<Pair>::kSecond;
-  }
-
- public:
-  // Whether pair<const K, V> and pair<K, V> are layout-compatible. If they are,
-  // then it is safe to store them in a union and read from either.
-  static constexpr bool value = std::is_standard_layout<K>() &&
-                                std::is_standard_layout<Pair>() &&
-                                memory_internal::OffsetOf<Pair>::kFirst == 0 &&
-                                LayoutCompatible<std::pair<K, V>>() &&
-                                LayoutCompatible<std::pair<const K, V>>();
-};
-
-}  // namespace memory_internal
-
-// The internal storage type for key-value containers like flat_hash_map.
-//
-// It is convenient for the value_type of a flat_hash_map<K, V> to be
-// pair<const K, V>; the "const K" prevents accidental modification of the key
-// when dealing with the reference returned from find() and similar methods.
-// However, this creates other problems; we want to be able to emplace(K, V)
-// efficiently with move operations, and similarly be able to move a
-// pair<K, V> in insert().
-//
-// The solution is this union, which aliases the const and non-const versions
-// of the pair. This also allows flat_hash_map<const K, V> to work, even though
-// that has the same efficiency issues with move in emplace() and insert() -
-// but people do it anyway.
-//
-// If kMutableKeys is false, only the value member can be accessed.
-//
-// If kMutableKeys is true, key can be accessed through all slots while value
-// and mutable_value must be accessed only via INITIALIZED slots. Slots are
-// created and destroyed via mutable_value so that the key can be moved later.
-//
-// Accessing one of the union fields while the other is active is safe as
-// long as they are layout-compatible, which is guaranteed by the definition of
-// kMutableKeys. For C++11, the relevant section of the standard is
-// https://timsong-cpp.github.io/cppwp/n3337/class.mem#19 (9.2.19)
-template <class K, class V>
-union map_slot_type {
-  map_slot_type() {}
-  ~map_slot_type() = delete;
-  using value_type = std::pair<const K, V>;
-  using mutable_value_type =
-      std::pair<absl::remove_const_t<K>, absl::remove_const_t<V>>;
-
-  value_type value;
-  mutable_value_type mutable_value;
-  absl::remove_const_t<K> key;
-};
-
-template <class K, class V>
-struct map_slot_policy {
-  using slot_type = map_slot_type<K, V>;
-  using value_type = std::pair<const K, V>;
-  using mutable_value_type = std::pair<K, V>;
-
- private:
-  static void emplace(slot_type* slot) {
-    // The construction of union doesn't do anything at runtime but it allows us
-    // to access its members without violating aliasing rules.
-    new (slot) slot_type;
-  }
-  // If pair<const K, V> and pair<K, V> are layout-compatible, we can accept one
-  // or the other via slot_type. We are also free to access the key via
-  // slot_type::key in this case.
-  using kMutableKeys = memory_internal::IsLayoutCompatible<K, V>;
-
- public:
-  static value_type& element(slot_type* slot) { return slot->value; }
-  static const value_type& element(const slot_type* slot) {
-    return slot->value;
-  }
-
-  // When C++17 is available, we can use std::launder to provide mutable
-  // access to the key for use in node handle.
-#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
-  static K& mutable_key(slot_type* slot) {
-    // Still check for kMutableKeys so that we can avoid calling std::launder
-    // unless necessary because it can interfere with optimizations.
-    return kMutableKeys::value ? slot->key
-                               : *std::launder(const_cast<K*>(
-                                     std::addressof(slot->value.first)));
-  }
-#else  // !(defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606)
-  static const K& mutable_key(slot_type* slot) { return key(slot); }
-#endif
-
-  static const K& key(const slot_type* slot) {
-    return kMutableKeys::value ? slot->key : slot->value.first;
-  }
-
-  template <class Allocator, class... Args>
-  static void construct(Allocator* alloc, slot_type* slot, Args&&... args) {
-    emplace(slot);
-    if (kMutableKeys::value) {
-      absl::allocator_traits<Allocator>::construct(*alloc, &slot->mutable_value,
-                                                   std::forward<Args>(args)...);
-    } else {
-      absl::allocator_traits<Allocator>::construct(*alloc, &slot->value,
-                                                   std::forward<Args>(args)...);
-    }
-  }
-
-  // Construct this slot by moving from another slot.
-  template <class Allocator>
-  static void construct(Allocator* alloc, slot_type* slot, slot_type* other) {
-    emplace(slot);
-    if (kMutableKeys::value) {
-      absl::allocator_traits<Allocator>::construct(
-          *alloc, &slot->mutable_value, std::move(other->mutable_value));
-    } else {
-      absl::allocator_traits<Allocator>::construct(*alloc, &slot->value,
-                                                   std::move(other->value));
-    }
-  }
-
-  template <class Allocator>
-  static void destroy(Allocator* alloc, slot_type* slot) {
-    if (kMutableKeys::value) {
-      absl::allocator_traits<Allocator>::destroy(*alloc, &slot->mutable_value);
-    } else {
-      absl::allocator_traits<Allocator>::destroy(*alloc, &slot->value);
-    }
-  }
-
-  template <class Allocator>
-  static void transfer(Allocator* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    emplace(new_slot);
-    if (kMutableKeys::value) {
-      absl::allocator_traits<Allocator>::construct(
-          *alloc, &new_slot->mutable_value, std::move(old_slot->mutable_value));
-    } else {
-      absl::allocator_traits<Allocator>::construct(*alloc, &new_slot->value,
-                                                   std::move(old_slot->value));
-    }
-    destroy(alloc, old_slot);
-  }
-
-  template <class Allocator>
-  static void swap(Allocator* alloc, slot_type* a, slot_type* b) {
-    if (kMutableKeys::value) {
-      using std::swap;
-      swap(a->mutable_value, b->mutable_value);
-    } else {
-      value_type tmp = std::move(a->value);
-      absl::allocator_traits<Allocator>::destroy(*alloc, &a->value);
-      absl::allocator_traits<Allocator>::construct(*alloc, &a->value,
-                                                   std::move(b->value));
-      absl::allocator_traits<Allocator>::destroy(*alloc, &b->value);
-      absl::allocator_traits<Allocator>::construct(*alloc, &b->value,
-                                                   std::move(tmp));
-    }
-  }
-
-  template <class Allocator>
-  static void move(Allocator* alloc, slot_type* src, slot_type* dest) {
-    if (kMutableKeys::value) {
-      dest->mutable_value = std::move(src->mutable_value);
-    } else {
-      absl::allocator_traits<Allocator>::destroy(*alloc, &dest->value);
-      absl::allocator_traits<Allocator>::construct(*alloc, &dest->value,
-                                                   std::move(src->value));
-    }
-  }
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_CONTAINER_MEMORY_H_
diff --git a/third_party/abseil/absl/container/internal/container_memory_test.cc b/third_party/abseil/absl/container/internal/container_memory_test.cc
deleted file mode 100644
index 6a7fcd2..0000000
--- a/third_party/abseil/absl/container/internal/container_memory_test.cc
+++ /dev/null
@@ -1,256 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/container_memory.h"
-
-#include <cstdint>
-#include <tuple>
-#include <typeindex>
-#include <typeinfo>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/test_instance_tracker.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::absl::test_internal::CopyableMovableInstance;
-using ::absl::test_internal::InstanceTracker;
-using ::testing::_;
-using ::testing::ElementsAre;
-using ::testing::Gt;
-using ::testing::Pair;
-
-TEST(Memory, AlignmentLargerThanBase) {
-  std::allocator<int8_t> alloc;
-  void* mem = Allocate<2>(&alloc, 3);
-  EXPECT_EQ(0, reinterpret_cast<uintptr_t>(mem) % 2);
-  memcpy(mem, "abc", 3);
-  Deallocate<2>(&alloc, mem, 3);
-}
-
-TEST(Memory, AlignmentSmallerThanBase) {
-  std::allocator<int64_t> alloc;
-  void* mem = Allocate<2>(&alloc, 3);
-  EXPECT_EQ(0, reinterpret_cast<uintptr_t>(mem) % 2);
-  memcpy(mem, "abc", 3);
-  Deallocate<2>(&alloc, mem, 3);
-}
-
-std::map<std::type_index, int>& AllocationMap() {
-  static auto* map = new std::map<std::type_index, int>;
-  return *map;
-}
-
-template <typename T>
-struct TypeCountingAllocator {
-  TypeCountingAllocator() = default;
-  template <typename U>
-  TypeCountingAllocator(const TypeCountingAllocator<U>&) {}  // NOLINT
-
-  using value_type = T;
-
-  T* allocate(size_t n, const void* = nullptr) {
-    AllocationMap()[typeid(T)] += n;
-    return std::allocator<T>().allocate(n);
-  }
-  void deallocate(T* p, std::size_t n) {
-    AllocationMap()[typeid(T)] -= n;
-    return std::allocator<T>().deallocate(p, n);
-  }
-};
-
-TEST(Memory, AllocateDeallocateMatchType) {
-  TypeCountingAllocator<int> alloc;
-  void* mem = Allocate<1>(&alloc, 1);
-  // Verify that it was allocated
-  EXPECT_THAT(AllocationMap(), ElementsAre(Pair(_, Gt(0))));
-  Deallocate<1>(&alloc, mem, 1);
-  // Verify that the deallocation matched.
-  EXPECT_THAT(AllocationMap(), ElementsAre(Pair(_, 0)));
-}
-
-class Fixture : public ::testing::Test {
-  using Alloc = std::allocator<std::string>;
-
- public:
-  Fixture() { ptr_ = std::allocator_traits<Alloc>::allocate(*alloc(), 1); }
-  ~Fixture() override {
-    std::allocator_traits<Alloc>::destroy(*alloc(), ptr_);
-    std::allocator_traits<Alloc>::deallocate(*alloc(), ptr_, 1);
-  }
-  std::string* ptr() { return ptr_; }
-  Alloc* alloc() { return &alloc_; }
-
- private:
-  Alloc alloc_;
-  std::string* ptr_;
-};
-
-TEST_F(Fixture, ConstructNoArgs) {
-  ConstructFromTuple(alloc(), ptr(), std::forward_as_tuple());
-  EXPECT_EQ(*ptr(), "");
-}
-
-TEST_F(Fixture, ConstructOneArg) {
-  ConstructFromTuple(alloc(), ptr(), std::forward_as_tuple("abcde"));
-  EXPECT_EQ(*ptr(), "abcde");
-}
-
-TEST_F(Fixture, ConstructTwoArg) {
-  ConstructFromTuple(alloc(), ptr(), std::forward_as_tuple(5, 'a'));
-  EXPECT_EQ(*ptr(), "aaaaa");
-}
-
-TEST(PairArgs, NoArgs) {
-  EXPECT_THAT(PairArgs(),
-              Pair(std::forward_as_tuple(), std::forward_as_tuple()));
-}
-
-TEST(PairArgs, TwoArgs) {
-  EXPECT_EQ(
-      std::make_pair(std::forward_as_tuple(1), std::forward_as_tuple('A')),
-      PairArgs(1, 'A'));
-}
-
-TEST(PairArgs, Pair) {
-  EXPECT_EQ(
-      std::make_pair(std::forward_as_tuple(1), std::forward_as_tuple('A')),
-      PairArgs(std::make_pair(1, 'A')));
-}
-
-TEST(PairArgs, Piecewise) {
-  EXPECT_EQ(
-      std::make_pair(std::forward_as_tuple(1), std::forward_as_tuple('A')),
-      PairArgs(std::piecewise_construct, std::forward_as_tuple(1),
-               std::forward_as_tuple('A')));
-}
-
-TEST(WithConstructed, Simple) {
-  EXPECT_EQ(1, WithConstructed<absl::string_view>(
-                   std::make_tuple(std::string("a")),
-                   [](absl::string_view str) { return str.size(); }));
-}
-
-template <class F, class Arg>
-decltype(DecomposeValue(std::declval<F>(), std::declval<Arg>()))
-DecomposeValueImpl(int, F&& f, Arg&& arg) {
-  return DecomposeValue(std::forward<F>(f), std::forward<Arg>(arg));
-}
-
-template <class F, class Arg>
-const char* DecomposeValueImpl(char, F&& f, Arg&& arg) {
-  return "not decomposable";
-}
-
-template <class F, class Arg>
-decltype(DecomposeValueImpl(0, std::declval<F>(), std::declval<Arg>()))
-TryDecomposeValue(F&& f, Arg&& arg) {
-  return DecomposeValueImpl(0, std::forward<F>(f), std::forward<Arg>(arg));
-}
-
-TEST(DecomposeValue, Decomposable) {
-  auto f = [](const int& x, int&& y) {
-    EXPECT_EQ(&x, &y);
-    EXPECT_EQ(42, x);
-    return 'A';
-  };
-  EXPECT_EQ('A', TryDecomposeValue(f, 42));
-}
-
-TEST(DecomposeValue, NotDecomposable) {
-  auto f = [](void*) {
-    ADD_FAILURE() << "Must not be called";
-    return 'A';
-  };
-  EXPECT_STREQ("not decomposable", TryDecomposeValue(f, 42));
-}
-
-template <class F, class... Args>
-decltype(DecomposePair(std::declval<F>(), std::declval<Args>()...))
-DecomposePairImpl(int, F&& f, Args&&... args) {
-  return DecomposePair(std::forward<F>(f), std::forward<Args>(args)...);
-}
-
-template <class F, class... Args>
-const char* DecomposePairImpl(char, F&& f, Args&&... args) {
-  return "not decomposable";
-}
-
-template <class F, class... Args>
-decltype(DecomposePairImpl(0, std::declval<F>(), std::declval<Args>()...))
-TryDecomposePair(F&& f, Args&&... args) {
-  return DecomposePairImpl(0, std::forward<F>(f), std::forward<Args>(args)...);
-}
-
-TEST(DecomposePair, Decomposable) {
-  auto f = [](const int& x, std::piecewise_construct_t, std::tuple<int&&> k,
-              std::tuple<double>&& v) {
-    EXPECT_EQ(&x, &std::get<0>(k));
-    EXPECT_EQ(42, x);
-    EXPECT_EQ(0.5, std::get<0>(v));
-    return 'A';
-  };
-  EXPECT_EQ('A', TryDecomposePair(f, 42, 0.5));
-  EXPECT_EQ('A', TryDecomposePair(f, std::make_pair(42, 0.5)));
-  EXPECT_EQ('A', TryDecomposePair(f, std::piecewise_construct,
-                                  std::make_tuple(42), std::make_tuple(0.5)));
-}
-
-TEST(DecomposePair, NotDecomposable) {
-  auto f = [](...) {
-    ADD_FAILURE() << "Must not be called";
-    return 'A';
-  };
-  EXPECT_STREQ("not decomposable",
-               TryDecomposePair(f));
-  EXPECT_STREQ("not decomposable",
-               TryDecomposePair(f, std::piecewise_construct, std::make_tuple(),
-                                std::make_tuple(0.5)));
-}
-
-TEST(MapSlotPolicy, ConstKeyAndValue) {
-  using slot_policy = map_slot_policy<const CopyableMovableInstance,
-                                      const CopyableMovableInstance>;
-  using slot_type = typename slot_policy::slot_type;
-
-  union Slots {
-    Slots() {}
-    ~Slots() {}
-    slot_type slots[100];
-  } slots;
-
-  std::allocator<
-      std::pair<const CopyableMovableInstance, const CopyableMovableInstance>>
-      alloc;
-  InstanceTracker tracker;
-  slot_policy::construct(&alloc, &slots.slots[0], CopyableMovableInstance(1),
-                         CopyableMovableInstance(1));
-  for (int i = 0; i < 99; ++i) {
-    slot_policy::transfer(&alloc, &slots.slots[i + 1], &slots.slots[i]);
-  }
-  slot_policy::destroy(&alloc, &slots.slots[99]);
-
-  EXPECT_EQ(tracker.copies(), 0);
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/counting_allocator.h b/third_party/abseil/absl/container/internal/counting_allocator.h
deleted file mode 100644
index 927cf08..0000000
--- a/third_party/abseil/absl/container/internal/counting_allocator.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_COUNTING_ALLOCATOR_H_
-#define ABSL_CONTAINER_INTERNAL_COUNTING_ALLOCATOR_H_
-
-#include <cstdint>
-#include <memory>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// This is a stateful allocator, but the state lives outside of the
-// allocator (in whatever test is using the allocator). This is odd
-// but helps in tests where the allocator is propagated into nested
-// containers - that chain of allocators uses the same state and is
-// thus easier to query for aggregate allocation information.
-template <typename T>
-class CountingAllocator {
- public:
-  using Allocator = std::allocator<T>;
-  using AllocatorTraits = std::allocator_traits<Allocator>;
-  using value_type = typename AllocatorTraits::value_type;
-  using pointer = typename AllocatorTraits::pointer;
-  using const_pointer = typename AllocatorTraits::const_pointer;
-  using size_type = typename AllocatorTraits::size_type;
-  using difference_type = typename AllocatorTraits::difference_type;
-
-  CountingAllocator() = default;
-  explicit CountingAllocator(int64_t* bytes_used) : bytes_used_(bytes_used) {}
-  CountingAllocator(int64_t* bytes_used, int64_t* instance_count)
-      : bytes_used_(bytes_used), instance_count_(instance_count) {}
-
-  template <typename U>
-  CountingAllocator(const CountingAllocator<U>& x)
-      : bytes_used_(x.bytes_used_), instance_count_(x.instance_count_) {}
-
-  pointer allocate(
-      size_type n,
-      typename AllocatorTraits::const_void_pointer hint = nullptr) {
-    Allocator allocator;
-    pointer ptr = AllocatorTraits::allocate(allocator, n, hint);
-    if (bytes_used_ != nullptr) {
-      *bytes_used_ += n * sizeof(T);
-    }
-    return ptr;
-  }
-
-  void deallocate(pointer p, size_type n) {
-    Allocator allocator;
-    AllocatorTraits::deallocate(allocator, p, n);
-    if (bytes_used_ != nullptr) {
-      *bytes_used_ -= n * sizeof(T);
-    }
-  }
-
-  template <typename U, typename... Args>
-  void construct(U* p, Args&&... args) {
-    Allocator allocator;
-    AllocatorTraits::construct(allocator, p, std::forward<Args>(args)...);
-    if (instance_count_ != nullptr) {
-      *instance_count_ += 1;
-    }
-  }
-
-  template <typename U>
-  void destroy(U* p) {
-    Allocator allocator;
-    AllocatorTraits::destroy(allocator, p);
-    if (instance_count_ != nullptr) {
-      *instance_count_ -= 1;
-    }
-  }
-
-  template <typename U>
-  class rebind {
-   public:
-    using other = CountingAllocator<U>;
-  };
-
-  friend bool operator==(const CountingAllocator& a,
-                         const CountingAllocator& b) {
-    return a.bytes_used_ == b.bytes_used_ &&
-           a.instance_count_ == b.instance_count_;
-  }
-
-  friend bool operator!=(const CountingAllocator& a,
-                         const CountingAllocator& b) {
-    return !(a == b);
-  }
-
-  int64_t* bytes_used_ = nullptr;
-  int64_t* instance_count_ = nullptr;
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_COUNTING_ALLOCATOR_H_
diff --git a/third_party/abseil/absl/container/internal/hash_function_defaults.h b/third_party/abseil/absl/container/internal/hash_function_defaults.h
deleted file mode 100644
index 0683422..0000000
--- a/third_party/abseil/absl/container/internal/hash_function_defaults.h
+++ /dev/null
@@ -1,161 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Define the default Hash and Eq functions for SwissTable containers.
-//
-// std::hash<T> and std::equal_to<T> are not appropriate hash and equal
-// functions for SwissTable containers. There are two reasons for this.
-//
-// SwissTable containers are power of 2 sized containers:
-//
-// This means they use the lower bits of the hash value to find the slot for
-// each entry. The typical hash function for integral types is the identity.
-// This is a very weak hash function for SwissTable and any power of 2 sized
-// hashtable implementation which will lead to excessive collisions. For
-// SwissTable we use murmur3 style mixing to reduce collisions to a minimum.
-//
-// SwissTable containers support heterogeneous lookup:
-//
-// In order to make heterogeneous lookup work, hash and equal functions must be
-// polymorphic. At the same time they have to satisfy the same requirements the
-// C++ standard imposes on hash functions and equality operators. That is:
-//
-//   if hash_default_eq<T>(a, b) returns true for any a and b of type T, then
-//   hash_default_hash<T>(a) must equal hash_default_hash<T>(b)
-//
-// For SwissTable containers this requirement is relaxed to allow a and b of
-// any and possibly different types. Note that like the standard the hash and
-// equal functions are still bound to T. This is important because some type U
-// can be hashed by/tested for equality differently depending on T. A notable
-// example is `const char*`. `const char*` is treated as a c-style string when
-// the hash function is hash<std::string> but as a pointer when the hash
-// function is hash<void*>.
-//
-#ifndef ABSL_CONTAINER_INTERNAL_HASH_FUNCTION_DEFAULTS_H_
-#define ABSL_CONTAINER_INTERNAL_HASH_FUNCTION_DEFAULTS_H_
-
-#include <stdint.h>
-#include <cstddef>
-#include <memory>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/config.h"
-#include "absl/hash/hash.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// The hash of an object of type T is computed by using absl::Hash.
-template <class T, class E = void>
-struct HashEq {
-  using Hash = absl::Hash<T>;
-  using Eq = std::equal_to<T>;
-};
-
-struct StringHash {
-  using is_transparent = void;
-
-  size_t operator()(absl::string_view v) const {
-    return absl::Hash<absl::string_view>{}(v);
-  }
-  size_t operator()(const absl::Cord& v) const {
-    return absl::Hash<absl::Cord>{}(v);
-  }
-};
-
-// Supports heterogeneous lookup for string-like elements.
-struct StringHashEq {
-  using Hash = StringHash;
-  struct Eq {
-    using is_transparent = void;
-    bool operator()(absl::string_view lhs, absl::string_view rhs) const {
-      return lhs == rhs;
-    }
-    bool operator()(const absl::Cord& lhs, const absl::Cord& rhs) const {
-      return lhs == rhs;
-    }
-    bool operator()(const absl::Cord& lhs, absl::string_view rhs) const {
-      return lhs == rhs;
-    }
-    bool operator()(absl::string_view lhs, const absl::Cord& rhs) const {
-      return lhs == rhs;
-    }
-  };
-};
-
-template <>
-struct HashEq<std::string> : StringHashEq {};
-template <>
-struct HashEq<absl::string_view> : StringHashEq {};
-template <>
-struct HashEq<absl::Cord> : StringHashEq {};
-
-// Supports heterogeneous lookup for pointers and smart pointers.
-template <class T>
-struct HashEq<T*> {
-  struct Hash {
-    using is_transparent = void;
-    template <class U>
-    size_t operator()(const U& ptr) const {
-      return absl::Hash<const T*>{}(HashEq::ToPtr(ptr));
-    }
-  };
-  struct Eq {
-    using is_transparent = void;
-    template <class A, class B>
-    bool operator()(const A& a, const B& b) const {
-      return HashEq::ToPtr(a) == HashEq::ToPtr(b);
-    }
-  };
-
- private:
-  static const T* ToPtr(const T* ptr) { return ptr; }
-  template <class U, class D>
-  static const T* ToPtr(const std::unique_ptr<U, D>& ptr) {
-    return ptr.get();
-  }
-  template <class U>
-  static const T* ToPtr(const std::shared_ptr<U>& ptr) {
-    return ptr.get();
-  }
-};
-
-template <class T, class D>
-struct HashEq<std::unique_ptr<T, D>> : HashEq<T*> {};
-template <class T>
-struct HashEq<std::shared_ptr<T>> : HashEq<T*> {};
-
-// This header's visibility is restricted.  If you need to access the default
-// hasher please use the container's ::hasher alias instead.
-//
-// Example: typename Hash = typename absl::flat_hash_map<K, V>::hasher
-template <class T>
-using hash_default_hash = typename container_internal::HashEq<T>::Hash;
-
-// This header's visibility is restricted.  If you need to access the default
-// key equal please use the container's ::key_equal alias instead.
-//
-// Example: typename Eq = typename absl::flat_hash_map<K, V, Hash>::key_equal
-template <class T>
-using hash_default_eq = typename container_internal::HashEq<T>::Eq;
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASH_FUNCTION_DEFAULTS_H_
diff --git a/third_party/abseil/absl/container/internal/hash_function_defaults_test.cc b/third_party/abseil/absl/container/internal/hash_function_defaults_test.cc
deleted file mode 100644
index 59576b8..0000000
--- a/third_party/abseil/absl/container/internal/hash_function_defaults_test.cc
+++ /dev/null
@@ -1,383 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hash_function_defaults.h"
-
-#include <functional>
-#include <type_traits>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/random/random.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/cord_test_helpers.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::testing::Types;
-
-TEST(Eq, Int32) {
-  hash_default_eq<int32_t> eq;
-  EXPECT_TRUE(eq(1, 1u));
-  EXPECT_TRUE(eq(1, char{1}));
-  EXPECT_TRUE(eq(1, true));
-  EXPECT_TRUE(eq(1, double{1.1}));
-  EXPECT_FALSE(eq(1, char{2}));
-  EXPECT_FALSE(eq(1, 2u));
-  EXPECT_FALSE(eq(1, false));
-  EXPECT_FALSE(eq(1, 2.));
-}
-
-TEST(Hash, Int32) {
-  hash_default_hash<int32_t> hash;
-  auto h = hash(1);
-  EXPECT_EQ(h, hash(1u));
-  EXPECT_EQ(h, hash(char{1}));
-  EXPECT_EQ(h, hash(true));
-  EXPECT_EQ(h, hash(double{1.1}));
-  EXPECT_NE(h, hash(2u));
-  EXPECT_NE(h, hash(char{2}));
-  EXPECT_NE(h, hash(false));
-  EXPECT_NE(h, hash(2.));
-}
-
-enum class MyEnum { A, B, C, D };
-
-TEST(Eq, Enum) {
-  hash_default_eq<MyEnum> eq;
-  EXPECT_TRUE(eq(MyEnum::A, MyEnum::A));
-  EXPECT_FALSE(eq(MyEnum::A, MyEnum::B));
-}
-
-TEST(Hash, Enum) {
-  hash_default_hash<MyEnum> hash;
-
-  for (MyEnum e : {MyEnum::A, MyEnum::B, MyEnum::C}) {
-    auto h = hash(e);
-    EXPECT_EQ(h, hash_default_hash<int>{}(static_cast<int>(e)));
-    EXPECT_NE(h, hash(MyEnum::D));
-  }
-}
-
-using StringTypes = ::testing::Types<std::string, absl::string_view>;
-
-template <class T>
-struct EqString : ::testing::Test {
-  hash_default_eq<T> key_eq;
-};
-
-TYPED_TEST_SUITE(EqString, StringTypes);
-
-template <class T>
-struct HashString : ::testing::Test {
-  hash_default_hash<T> hasher;
-};
-
-TYPED_TEST_SUITE(HashString, StringTypes);
-
-TYPED_TEST(EqString, Works) {
-  auto eq = this->key_eq;
-  EXPECT_TRUE(eq("a", "a"));
-  EXPECT_TRUE(eq("a", absl::string_view("a")));
-  EXPECT_TRUE(eq("a", std::string("a")));
-  EXPECT_FALSE(eq("a", "b"));
-  EXPECT_FALSE(eq("a", absl::string_view("b")));
-  EXPECT_FALSE(eq("a", std::string("b")));
-}
-
-TYPED_TEST(HashString, Works) {
-  auto hash = this->hasher;
-  auto h = hash("a");
-  EXPECT_EQ(h, hash(absl::string_view("a")));
-  EXPECT_EQ(h, hash(std::string("a")));
-  EXPECT_NE(h, hash(absl::string_view("b")));
-  EXPECT_NE(h, hash(std::string("b")));
-}
-
-struct NoDeleter {
-  template <class T>
-  void operator()(const T* ptr) const {}
-};
-
-using PointerTypes =
-    ::testing::Types<const int*, int*, std::unique_ptr<const int>,
-                     std::unique_ptr<const int, NoDeleter>,
-                     std::unique_ptr<int>, std::unique_ptr<int, NoDeleter>,
-                     std::shared_ptr<const int>, std::shared_ptr<int>>;
-
-template <class T>
-struct EqPointer : ::testing::Test {
-  hash_default_eq<T> key_eq;
-};
-
-TYPED_TEST_SUITE(EqPointer, PointerTypes);
-
-template <class T>
-struct HashPointer : ::testing::Test {
-  hash_default_hash<T> hasher;
-};
-
-TYPED_TEST_SUITE(HashPointer, PointerTypes);
-
-TYPED_TEST(EqPointer, Works) {
-  int dummy;
-  auto eq = this->key_eq;
-  auto sptr = std::make_shared<int>();
-  std::shared_ptr<const int> csptr = sptr;
-  int* ptr = sptr.get();
-  const int* cptr = ptr;
-  std::unique_ptr<int, NoDeleter> uptr(ptr);
-  std::unique_ptr<const int, NoDeleter> cuptr(ptr);
-
-  EXPECT_TRUE(eq(ptr, cptr));
-  EXPECT_TRUE(eq(ptr, sptr));
-  EXPECT_TRUE(eq(ptr, uptr));
-  EXPECT_TRUE(eq(ptr, csptr));
-  EXPECT_TRUE(eq(ptr, cuptr));
-  EXPECT_FALSE(eq(&dummy, cptr));
-  EXPECT_FALSE(eq(&dummy, sptr));
-  EXPECT_FALSE(eq(&dummy, uptr));
-  EXPECT_FALSE(eq(&dummy, csptr));
-  EXPECT_FALSE(eq(&dummy, cuptr));
-}
-
-TEST(Hash, DerivedAndBase) {
-  struct Base {};
-  struct Derived : Base {};
-
-  hash_default_hash<Base*> hasher;
-
-  Base base;
-  Derived derived;
-  EXPECT_NE(hasher(&base), hasher(&derived));
-  EXPECT_EQ(hasher(static_cast<Base*>(&derived)), hasher(&derived));
-
-  auto dp = std::make_shared<Derived>();
-  EXPECT_EQ(hasher(static_cast<Base*>(dp.get())), hasher(dp));
-}
-
-TEST(Hash, FunctionPointer) {
-  using Func = int (*)();
-  hash_default_hash<Func> hasher;
-  hash_default_eq<Func> eq;
-
-  Func p1 = [] { return 1; }, p2 = [] { return 2; };
-  EXPECT_EQ(hasher(p1), hasher(p1));
-  EXPECT_TRUE(eq(p1, p1));
-
-  EXPECT_NE(hasher(p1), hasher(p2));
-  EXPECT_FALSE(eq(p1, p2));
-}
-
-TYPED_TEST(HashPointer, Works) {
-  int dummy;
-  auto hash = this->hasher;
-  auto sptr = std::make_shared<int>();
-  std::shared_ptr<const int> csptr = sptr;
-  int* ptr = sptr.get();
-  const int* cptr = ptr;
-  std::unique_ptr<int, NoDeleter> uptr(ptr);
-  std::unique_ptr<const int, NoDeleter> cuptr(ptr);
-
-  EXPECT_EQ(hash(ptr), hash(cptr));
-  EXPECT_EQ(hash(ptr), hash(sptr));
-  EXPECT_EQ(hash(ptr), hash(uptr));
-  EXPECT_EQ(hash(ptr), hash(csptr));
-  EXPECT_EQ(hash(ptr), hash(cuptr));
-  EXPECT_NE(hash(&dummy), hash(cptr));
-  EXPECT_NE(hash(&dummy), hash(sptr));
-  EXPECT_NE(hash(&dummy), hash(uptr));
-  EXPECT_NE(hash(&dummy), hash(csptr));
-  EXPECT_NE(hash(&dummy), hash(cuptr));
-}
-
-TEST(EqCord, Works) {
-  hash_default_eq<absl::Cord> eq;
-  const absl::string_view a_string_view = "a";
-  const absl::Cord a_cord(a_string_view);
-  const absl::string_view b_string_view = "b";
-  const absl::Cord b_cord(b_string_view);
-
-  EXPECT_TRUE(eq(a_cord, a_cord));
-  EXPECT_TRUE(eq(a_cord, a_string_view));
-  EXPECT_TRUE(eq(a_string_view, a_cord));
-  EXPECT_FALSE(eq(a_cord, b_cord));
-  EXPECT_FALSE(eq(a_cord, b_string_view));
-  EXPECT_FALSE(eq(b_string_view, a_cord));
-}
-
-TEST(HashCord, Works) {
-  hash_default_hash<absl::Cord> hash;
-  const absl::string_view a_string_view = "a";
-  const absl::Cord a_cord(a_string_view);
-  const absl::string_view b_string_view = "b";
-  const absl::Cord b_cord(b_string_view);
-
-  EXPECT_EQ(hash(a_cord), hash(a_cord));
-  EXPECT_EQ(hash(b_cord), hash(b_cord));
-  EXPECT_EQ(hash(a_string_view), hash(a_cord));
-  EXPECT_EQ(hash(b_string_view), hash(b_cord));
-  EXPECT_EQ(hash(absl::Cord("")), hash(""));
-  EXPECT_EQ(hash(absl::Cord()), hash(absl::string_view()));
-
-  EXPECT_NE(hash(a_cord), hash(b_cord));
-  EXPECT_NE(hash(a_cord), hash(b_string_view));
-  EXPECT_NE(hash(a_string_view), hash(b_cord));
-  EXPECT_NE(hash(a_string_view), hash(b_string_view));
-}
-
-void NoOpReleaser(absl::string_view data, void* arg) {}
-
-TEST(HashCord, FragmentedCordWorks) {
-  hash_default_hash<absl::Cord> hash;
-  absl::Cord c = absl::MakeFragmentedCord({"a", "b", "c"});
-  EXPECT_FALSE(c.TryFlat().has_value());
-  EXPECT_EQ(hash(c), hash("abc"));
-}
-
-TEST(HashCord, FragmentedLongCordWorks) {
-  hash_default_hash<absl::Cord> hash;
-  // Crete some large strings which do not fit on the stack.
-  std::string a(65536, 'a');
-  std::string b(65536, 'b');
-  absl::Cord c = absl::MakeFragmentedCord({a, b});
-  EXPECT_FALSE(c.TryFlat().has_value());
-  EXPECT_EQ(hash(c), hash(a + b));
-}
-
-TEST(HashCord, RandomCord) {
-  hash_default_hash<absl::Cord> hash;
-  auto bitgen = absl::BitGen();
-  for (int i = 0; i < 1000; ++i) {
-    const int number_of_segments = absl::Uniform(bitgen, 0, 10);
-    std::vector<std::string> pieces;
-    for (size_t s = 0; s < number_of_segments; ++s) {
-      std::string str;
-      str.resize(absl::Uniform(bitgen, 0, 4096));
-      // MSVC needed the explicit return type in the lambda.
-      std::generate(str.begin(), str.end(), [&]() -> char {
-        return static_cast<char>(absl::Uniform<unsigned char>(bitgen));
-      });
-      pieces.push_back(str);
-    }
-    absl::Cord c = absl::MakeFragmentedCord(pieces);
-    EXPECT_EQ(hash(c), hash(std::string(c)));
-  }
-}
-
-// Cartesian product of (std::string, absl::string_view)
-// with (std::string, absl::string_view, const char*, absl::Cord).
-using StringTypesCartesianProduct = Types<
-    // clang-format off
-    std::pair<absl::Cord, std::string>,
-    std::pair<absl::Cord, absl::string_view>,
-    std::pair<absl::Cord, absl::Cord>,
-    std::pair<absl::Cord, const char*>,
-
-    std::pair<std::string, absl::Cord>,
-    std::pair<absl::string_view, absl::Cord>,
-
-    std::pair<absl::string_view, std::string>,
-    std::pair<absl::string_view, absl::string_view>,
-    std::pair<absl::string_view, const char*>>;
-// clang-format on
-
-constexpr char kFirstString[] = "abc123";
-constexpr char kSecondString[] = "ijk456";
-
-template <typename T>
-struct StringLikeTest : public ::testing::Test {
-  typename T::first_type a1{kFirstString};
-  typename T::second_type b1{kFirstString};
-  typename T::first_type a2{kSecondString};
-  typename T::second_type b2{kSecondString};
-  hash_default_eq<typename T::first_type> eq;
-  hash_default_hash<typename T::first_type> hash;
-};
-
-TYPED_TEST_CASE_P(StringLikeTest);
-
-TYPED_TEST_P(StringLikeTest, Eq) {
-  EXPECT_TRUE(this->eq(this->a1, this->b1));
-  EXPECT_TRUE(this->eq(this->b1, this->a1));
-}
-
-TYPED_TEST_P(StringLikeTest, NotEq) {
-  EXPECT_FALSE(this->eq(this->a1, this->b2));
-  EXPECT_FALSE(this->eq(this->b2, this->a1));
-}
-
-TYPED_TEST_P(StringLikeTest, HashEq) {
-  EXPECT_EQ(this->hash(this->a1), this->hash(this->b1));
-  EXPECT_EQ(this->hash(this->a2), this->hash(this->b2));
-  // It would be a poor hash function which collides on these strings.
-  EXPECT_NE(this->hash(this->a1), this->hash(this->b2));
-}
-
-TYPED_TEST_SUITE(StringLikeTest, StringTypesCartesianProduct);
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-enum Hash : size_t {
-  kStd = 0x1,       // std::hash
-#ifdef _MSC_VER
-  kExtension = kStd,  // In MSVC, std::hash == ::hash
-#else                 // _MSC_VER
-  kExtension = 0x2,  // ::hash (GCC extension)
-#endif                // _MSC_VER
-};
-
-// H is a bitmask of Hash enumerations.
-// Hashable<H> is hashable via all means specified in H.
-template <int H>
-struct Hashable {
-  static constexpr bool HashableBy(Hash h) { return h & H; }
-};
-
-namespace std {
-template <int H>
-struct hash<Hashable<H>> {
-  template <class E = Hashable<H>,
-            class = typename std::enable_if<E::HashableBy(kStd)>::type>
-  size_t operator()(E) const {
-    return kStd;
-  }
-};
-}  // namespace std
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-template <class T>
-size_t Hash(const T& v) {
-  return hash_default_hash<T>()(v);
-}
-
-TEST(Delegate, HashDispatch) {
-  EXPECT_EQ(Hash(kStd), Hash(Hashable<kStd>()));
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/hash_generator_testing.cc b/third_party/abseil/absl/container/internal/hash_generator_testing.cc
deleted file mode 100644
index 59cc5aa..0000000
--- a/third_party/abseil/absl/container/internal/hash_generator_testing.cc
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hash_generator_testing.h"
-
-#include <deque>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace hash_internal {
-namespace {
-
-class RandomDeviceSeedSeq {
- public:
-  using result_type = typename std::random_device::result_type;
-
-  template <class Iterator>
-  void generate(Iterator start, Iterator end) {
-    while (start != end) {
-      *start = gen_();
-      ++start;
-    }
-  }
-
- private:
-  std::random_device gen_;
-};
-
-}  // namespace
-
-std::mt19937_64* GetSharedRng() {
-  static auto* rng = [] {
-    RandomDeviceSeedSeq seed_seq;
-    return new std::mt19937_64(seed_seq);
-  }();
-  return rng;
-}
-
-std::string Generator<std::string>::operator()() const {
-  // NOLINTNEXTLINE(runtime/int)
-  std::uniform_int_distribution<short> chars(0x20, 0x7E);
-  std::string res;
-  res.resize(32);
-  std::generate(res.begin(), res.end(),
-                [&]() { return chars(*GetSharedRng()); });
-  return res;
-}
-
-absl::string_view Generator<absl::string_view>::operator()() const {
-  static auto* arena = new std::deque<std::string>();
-  // NOLINTNEXTLINE(runtime/int)
-  std::uniform_int_distribution<short> chars(0x20, 0x7E);
-  arena->emplace_back();
-  auto& res = arena->back();
-  res.resize(32);
-  std::generate(res.begin(), res.end(),
-                [&]() { return chars(*GetSharedRng()); });
-  return res;
-}
-
-}  // namespace hash_internal
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/hash_generator_testing.h b/third_party/abseil/absl/container/internal/hash_generator_testing.h
deleted file mode 100644
index 6869fe4..0000000
--- a/third_party/abseil/absl/container/internal/hash_generator_testing.h
+++ /dev/null
@@ -1,161 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Generates random values for testing. Specialized only for the few types we
-// care about.
-
-#ifndef ABSL_CONTAINER_INTERNAL_HASH_GENERATOR_TESTING_H_
-#define ABSL_CONTAINER_INTERNAL_HASH_GENERATOR_TESTING_H_
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <iosfwd>
-#include <random>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/container/internal/hash_policy_testing.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace hash_internal {
-namespace generator_internal {
-
-template <class Container, class = void>
-struct IsMap : std::false_type {};
-
-template <class Map>
-struct IsMap<Map, absl::void_t<typename Map::mapped_type>> : std::true_type {};
-
-}  // namespace generator_internal
-
-std::mt19937_64* GetSharedRng();
-
-enum Enum {
-  kEnumEmpty,
-  kEnumDeleted,
-};
-
-enum class EnumClass : uint64_t {
-  kEmpty,
-  kDeleted,
-};
-
-inline std::ostream& operator<<(std::ostream& o, const EnumClass& ec) {
-  return o << static_cast<uint64_t>(ec);
-}
-
-template <class T, class E = void>
-struct Generator;
-
-template <class T>
-struct Generator<T, typename std::enable_if<std::is_integral<T>::value>::type> {
-  T operator()() const {
-    std::uniform_int_distribution<T> dist;
-    return dist(*GetSharedRng());
-  }
-};
-
-template <>
-struct Generator<Enum> {
-  Enum operator()() const {
-    std::uniform_int_distribution<typename std::underlying_type<Enum>::type>
-        dist;
-    while (true) {
-      auto variate = dist(*GetSharedRng());
-      if (variate != kEnumEmpty && variate != kEnumDeleted)
-        return static_cast<Enum>(variate);
-    }
-  }
-};
-
-template <>
-struct Generator<EnumClass> {
-  EnumClass operator()() const {
-    std::uniform_int_distribution<
-        typename std::underlying_type<EnumClass>::type>
-        dist;
-    while (true) {
-      EnumClass variate = static_cast<EnumClass>(dist(*GetSharedRng()));
-      if (variate != EnumClass::kEmpty && variate != EnumClass::kDeleted)
-        return static_cast<EnumClass>(variate);
-    }
-  }
-};
-
-template <>
-struct Generator<std::string> {
-  std::string operator()() const;
-};
-
-template <>
-struct Generator<absl::string_view> {
-  absl::string_view operator()() const;
-};
-
-template <>
-struct Generator<NonStandardLayout> {
-  NonStandardLayout operator()() const {
-    return NonStandardLayout(Generator<std::string>()());
-  }
-};
-
-template <class K, class V>
-struct Generator<std::pair<K, V>> {
-  std::pair<K, V> operator()() const {
-    return std::pair<K, V>(Generator<typename std::decay<K>::type>()(),
-                           Generator<typename std::decay<V>::type>()());
-  }
-};
-
-template <class... Ts>
-struct Generator<std::tuple<Ts...>> {
-  std::tuple<Ts...> operator()() const {
-    return std::tuple<Ts...>(Generator<typename std::decay<Ts>::type>()()...);
-  }
-};
-
-template <class T>
-struct Generator<std::unique_ptr<T>> {
-  std::unique_ptr<T> operator()() const {
-    return absl::make_unique<T>(Generator<T>()());
-  }
-};
-
-template <class U>
-struct Generator<U, absl::void_t<decltype(std::declval<U&>().key()),
-                                decltype(std::declval<U&>().value())>>
-    : Generator<std::pair<
-          typename std::decay<decltype(std::declval<U&>().key())>::type,
-          typename std::decay<decltype(std::declval<U&>().value())>::type>> {};
-
-template <class Container>
-using GeneratedType = decltype(
-    std::declval<const Generator<
-        typename std::conditional<generator_internal::IsMap<Container>::value,
-                                  typename Container::value_type,
-                                  typename Container::key_type>::type>&>()());
-
-}  // namespace hash_internal
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASH_GENERATOR_TESTING_H_
diff --git a/third_party/abseil/absl/container/internal/hash_policy_testing.h b/third_party/abseil/absl/container/internal/hash_policy_testing.h
deleted file mode 100644
index 01c40d2..0000000
--- a/third_party/abseil/absl/container/internal/hash_policy_testing.h
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Utilities to help tests verify that hash tables properly handle stateful
-// allocators and hash functions.
-
-#ifndef ABSL_CONTAINER_INTERNAL_HASH_POLICY_TESTING_H_
-#define ABSL_CONTAINER_INTERNAL_HASH_POLICY_TESTING_H_
-
-#include <cstdlib>
-#include <limits>
-#include <memory>
-#include <ostream>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "absl/hash/hash.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace hash_testing_internal {
-
-template <class Derived>
-struct WithId {
-  WithId() : id_(next_id<Derived>()) {}
-  WithId(const WithId& that) : id_(that.id_) {}
-  WithId(WithId&& that) : id_(that.id_) { that.id_ = 0; }
-  WithId& operator=(const WithId& that) {
-    id_ = that.id_;
-    return *this;
-  }
-  WithId& operator=(WithId&& that) {
-    id_ = that.id_;
-    that.id_ = 0;
-    return *this;
-  }
-
-  size_t id() const { return id_; }
-
-  friend bool operator==(const WithId& a, const WithId& b) {
-    return a.id_ == b.id_;
-  }
-  friend bool operator!=(const WithId& a, const WithId& b) { return !(a == b); }
-
- protected:
-  explicit WithId(size_t id) : id_(id) {}
-
- private:
-  size_t id_;
-
-  template <class T>
-  static size_t next_id() {
-    // 0 is reserved for moved from state.
-    static size_t gId = 1;
-    return gId++;
-  }
-};
-
-}  // namespace hash_testing_internal
-
-struct NonStandardLayout {
-  NonStandardLayout() {}
-  explicit NonStandardLayout(std::string s) : value(std::move(s)) {}
-  virtual ~NonStandardLayout() {}
-
-  friend bool operator==(const NonStandardLayout& a,
-                         const NonStandardLayout& b) {
-    return a.value == b.value;
-  }
-  friend bool operator!=(const NonStandardLayout& a,
-                         const NonStandardLayout& b) {
-    return a.value != b.value;
-  }
-
-  template <typename H>
-  friend H AbslHashValue(H h, const NonStandardLayout& v) {
-    return H::combine(std::move(h), v.value);
-  }
-
-  std::string value;
-};
-
-struct StatefulTestingHash
-    : absl::container_internal::hash_testing_internal::WithId<
-          StatefulTestingHash> {
-  template <class T>
-  size_t operator()(const T& t) const {
-    return absl::Hash<T>{}(t);
-  }
-};
-
-struct StatefulTestingEqual
-    : absl::container_internal::hash_testing_internal::WithId<
-          StatefulTestingEqual> {
-  template <class T, class U>
-  bool operator()(const T& t, const U& u) const {
-    return t == u;
-  }
-};
-
-// It is expected that Alloc() == Alloc() for all allocators so we cannot use
-// WithId base. We need to explicitly assign ids.
-template <class T = int>
-struct Alloc : std::allocator<T> {
-  using propagate_on_container_swap = std::true_type;
-
-  // Using old paradigm for this to ensure compatibility.
-  explicit Alloc(size_t id = 0) : id_(id) {}
-
-  Alloc(const Alloc&) = default;
-  Alloc& operator=(const Alloc&) = default;
-
-  template <class U>
-  Alloc(const Alloc<U>& that) : std::allocator<T>(that), id_(that.id()) {}
-
-  template <class U>
-  struct rebind {
-    using other = Alloc<U>;
-  };
-
-  size_t id() const { return id_; }
-
-  friend bool operator==(const Alloc& a, const Alloc& b) {
-    return a.id_ == b.id_;
-  }
-  friend bool operator!=(const Alloc& a, const Alloc& b) { return !(a == b); }
-
- private:
-  size_t id_ = (std::numeric_limits<size_t>::max)();
-};
-
-template <class Map>
-auto items(const Map& m) -> std::vector<
-    std::pair<typename Map::key_type, typename Map::mapped_type>> {
-  using std::get;
-  std::vector<std::pair<typename Map::key_type, typename Map::mapped_type>> res;
-  res.reserve(m.size());
-  for (const auto& v : m) res.emplace_back(get<0>(v), get<1>(v));
-  return res;
-}
-
-template <class Set>
-auto keys(const Set& s)
-    -> std::vector<typename std::decay<typename Set::key_type>::type> {
-  std::vector<typename std::decay<typename Set::key_type>::type> res;
-  res.reserve(s.size());
-  for (const auto& v : s) res.emplace_back(v);
-  return res;
-}
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// ABSL_UNORDERED_SUPPORTS_ALLOC_CTORS is false for glibcxx versions
-// where the unordered containers are missing certain constructors that
-// take allocator arguments. This test is defined ad-hoc for the platforms
-// we care about (notably Crosstool 17) because libstdcxx's useless
-// versioning scheme precludes a more principled solution.
-// From GCC-4.9 Changelog: (src: https://gcc.gnu.org/gcc-4.9/changes.html)
-// "the unordered associative containers in <unordered_map> and <unordered_set>
-// meet the allocator-aware container requirements;"
-#if (defined(__GLIBCXX__) && __GLIBCXX__ <= 20140425 ) || \
-( __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 9 ))
-#define ABSL_UNORDERED_SUPPORTS_ALLOC_CTORS 0
-#else
-#define ABSL_UNORDERED_SUPPORTS_ALLOC_CTORS 1
-#endif
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASH_POLICY_TESTING_H_
diff --git a/third_party/abseil/absl/container/internal/hash_policy_testing_test.cc b/third_party/abseil/absl/container/internal/hash_policy_testing_test.cc
deleted file mode 100644
index f0b20fe..0000000
--- a/third_party/abseil/absl/container/internal/hash_policy_testing_test.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hash_policy_testing.h"
-
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-TEST(_, Hash) {
-  StatefulTestingHash h1;
-  EXPECT_EQ(1, h1.id());
-  StatefulTestingHash h2;
-  EXPECT_EQ(2, h2.id());
-  StatefulTestingHash h1c(h1);
-  EXPECT_EQ(1, h1c.id());
-  StatefulTestingHash h2m(std::move(h2));
-  EXPECT_EQ(2, h2m.id());
-  EXPECT_EQ(0, h2.id());
-  StatefulTestingHash h3;
-  EXPECT_EQ(3, h3.id());
-  h3 = StatefulTestingHash();
-  EXPECT_EQ(4, h3.id());
-  h3 = std::move(h1);
-  EXPECT_EQ(1, h3.id());
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/hash_policy_traits.h b/third_party/abseil/absl/container/internal/hash_policy_traits.h
deleted file mode 100644
index 46c97b1..0000000
--- a/third_party/abseil/absl/container/internal/hash_policy_traits.h
+++ /dev/null
@@ -1,208 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_HASH_POLICY_TRAITS_H_
-#define ABSL_CONTAINER_INTERNAL_HASH_POLICY_TRAITS_H_
-
-#include <cstddef>
-#include <memory>
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// Defines how slots are initialized/destroyed/moved.
-template <class Policy, class = void>
-struct hash_policy_traits {
-  // The type of the keys stored in the hashtable.
-  using key_type = typename Policy::key_type;
-
- private:
-  struct ReturnKey {
-    // When C++17 is available, we can use std::launder to provide mutable
-    // access to the key for use in node handle.
-#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
-    template <class Key,
-              absl::enable_if_t<std::is_lvalue_reference<Key>::value, int> = 0>
-    static key_type& Impl(Key&& k, int) {
-      return *std::launder(
-          const_cast<key_type*>(std::addressof(std::forward<Key>(k))));
-    }
-#endif
-
-    template <class Key>
-    static Key Impl(Key&& k, char) {
-      return std::forward<Key>(k);
-    }
-
-    // When Key=T&, we forward the lvalue reference.
-    // When Key=T, we return by value to avoid a dangling reference.
-    // eg, for string_hash_map.
-    template <class Key, class... Args>
-    auto operator()(Key&& k, const Args&...) const
-        -> decltype(Impl(std::forward<Key>(k), 0)) {
-      return Impl(std::forward<Key>(k), 0);
-    }
-  };
-
-  template <class P = Policy, class = void>
-  struct ConstantIteratorsImpl : std::false_type {};
-
-  template <class P>
-  struct ConstantIteratorsImpl<P, absl::void_t<typename P::constant_iterators>>
-      : P::constant_iterators {};
-
- public:
-  // The actual object stored in the hash table.
-  using slot_type = typename Policy::slot_type;
-
-  // The argument type for insertions into the hashtable. This is different
-  // from value_type for increased performance. See initializer_list constructor
-  // and insert() member functions for more details.
-  using init_type = typename Policy::init_type;
-
-  using reference = decltype(Policy::element(std::declval<slot_type*>()));
-  using pointer = typename std::remove_reference<reference>::type*;
-  using value_type = typename std::remove_reference<reference>::type;
-
-  // Policies can set this variable to tell raw_hash_set that all iterators
-  // should be constant, even `iterator`. This is useful for set-like
-  // containers.
-  // Defaults to false if not provided by the policy.
-  using constant_iterators = ConstantIteratorsImpl<>;
-
-  // PRECONDITION: `slot` is UNINITIALIZED
-  // POSTCONDITION: `slot` is INITIALIZED
-  template <class Alloc, class... Args>
-  static void construct(Alloc* alloc, slot_type* slot, Args&&... args) {
-    Policy::construct(alloc, slot, std::forward<Args>(args)...);
-  }
-
-  // PRECONDITION: `slot` is INITIALIZED
-  // POSTCONDITION: `slot` is UNINITIALIZED
-  template <class Alloc>
-  static void destroy(Alloc* alloc, slot_type* slot) {
-    Policy::destroy(alloc, slot);
-  }
-
-  // Transfers the `old_slot` to `new_slot`. Any memory allocated by the
-  // allocator inside `old_slot` to `new_slot` can be transferred.
-  //
-  // OPTIONAL: defaults to:
-  //
-  //     clone(new_slot, std::move(*old_slot));
-  //     destroy(old_slot);
-  //
-  // PRECONDITION: `new_slot` is UNINITIALIZED and `old_slot` is INITIALIZED
-  // POSTCONDITION: `new_slot` is INITIALIZED and `old_slot` is
-  //                UNINITIALIZED
-  template <class Alloc>
-  static void transfer(Alloc* alloc, slot_type* new_slot, slot_type* old_slot) {
-    transfer_impl(alloc, new_slot, old_slot, 0);
-  }
-
-  // PRECONDITION: `slot` is INITIALIZED
-  // POSTCONDITION: `slot` is INITIALIZED
-  template <class P = Policy>
-  static auto element(slot_type* slot) -> decltype(P::element(slot)) {
-    return P::element(slot);
-  }
-
-  // Returns the amount of memory owned by `slot`, exclusive of `sizeof(*slot)`.
-  //
-  // If `slot` is nullptr, returns the constant amount of memory owned by any
-  // full slot or -1 if slots own variable amounts of memory.
-  //
-  // PRECONDITION: `slot` is INITIALIZED or nullptr
-  template <class P = Policy>
-  static size_t space_used(const slot_type* slot) {
-    return P::space_used(slot);
-  }
-
-  // Provides generalized access to the key for elements, both for elements in
-  // the table and for elements that have not yet been inserted (or even
-  // constructed).  We would like an API that allows us to say: `key(args...)`
-  // but we cannot do that for all cases, so we use this more general API that
-  // can be used for many things, including the following:
-  //
-  //   - Given an element in a table, get its key.
-  //   - Given an element initializer, get its key.
-  //   - Given `emplace()` arguments, get the element key.
-  //
-  // Implementations of this must adhere to a very strict technical
-  // specification around aliasing and consuming arguments:
-  //
-  // Let `value_type` be the result type of `element()` without ref- and
-  // cv-qualifiers. The first argument is a functor, the rest are constructor
-  // arguments for `value_type`. Returns `std::forward<F>(f)(k, xs...)`, where
-  // `k` is the element key, and `xs...` are the new constructor arguments for
-  // `value_type`. It's allowed for `k` to alias `xs...`, and for both to alias
-  // `ts...`. The key won't be touched once `xs...` are used to construct an
-  // element; `ts...` won't be touched at all, which allows `apply()` to consume
-  // any rvalues among them.
-  //
-  // If `value_type` is constructible from `Ts&&...`, `Policy::apply()` must not
-  // trigger a hard compile error unless it originates from `f`. In other words,
-  // `Policy::apply()` must be SFINAE-friendly. If `value_type` is not
-  // constructible from `Ts&&...`, either SFINAE or a hard compile error is OK.
-  //
-  // If `Ts...` is `[cv] value_type[&]` or `[cv] init_type[&]`,
-  // `Policy::apply()` must work. A compile error is not allowed, SFINAE or not.
-  template <class F, class... Ts, class P = Policy>
-  static auto apply(F&& f, Ts&&... ts)
-      -> decltype(P::apply(std::forward<F>(f), std::forward<Ts>(ts)...)) {
-    return P::apply(std::forward<F>(f), std::forward<Ts>(ts)...);
-  }
-
-  // Returns the "key" portion of the slot.
-  // Used for node handle manipulation.
-  template <class P = Policy>
-  static auto mutable_key(slot_type* slot)
-      -> decltype(P::apply(ReturnKey(), element(slot))) {
-    return P::apply(ReturnKey(), element(slot));
-  }
-
-  // Returns the "value" (as opposed to the "key") portion of the element. Used
-  // by maps to implement `operator[]`, `at()` and `insert_or_assign()`.
-  template <class T, class P = Policy>
-  static auto value(T* elem) -> decltype(P::value(elem)) {
-    return P::value(elem);
-  }
-
- private:
-  // Use auto -> decltype as an enabler.
-  template <class Alloc, class P = Policy>
-  static auto transfer_impl(Alloc* alloc, slot_type* new_slot,
-                            slot_type* old_slot, int)
-      -> decltype((void)P::transfer(alloc, new_slot, old_slot)) {
-    P::transfer(alloc, new_slot, old_slot);
-  }
-  template <class Alloc>
-  static void transfer_impl(Alloc* alloc, slot_type* new_slot,
-                            slot_type* old_slot, char) {
-    construct(alloc, new_slot, std::move(element(old_slot)));
-    destroy(alloc, old_slot);
-  }
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASH_POLICY_TRAITS_H_
diff --git a/third_party/abseil/absl/container/internal/hash_policy_traits_test.cc b/third_party/abseil/absl/container/internal/hash_policy_traits_test.cc
deleted file mode 100644
index 6ef8b9e..0000000
--- a/third_party/abseil/absl/container/internal/hash_policy_traits_test.cc
+++ /dev/null
@@ -1,144 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hash_policy_traits.h"
-
-#include <functional>
-#include <memory>
-#include <new>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::testing::MockFunction;
-using ::testing::Return;
-using ::testing::ReturnRef;
-
-using Alloc = std::allocator<int>;
-using Slot = int;
-
-struct PolicyWithoutOptionalOps {
-  using slot_type = Slot;
-  using key_type = Slot;
-  using init_type = Slot;
-
-  static std::function<void(void*, Slot*, Slot)> construct;
-  static std::function<void(void*, Slot*)> destroy;
-
-  static std::function<Slot&(Slot*)> element;
-  static int apply(int v) { return apply_impl(v); }
-  static std::function<int(int)> apply_impl;
-  static std::function<Slot&(Slot*)> value;
-};
-
-std::function<void(void*, Slot*, Slot)> PolicyWithoutOptionalOps::construct;
-std::function<void(void*, Slot*)> PolicyWithoutOptionalOps::destroy;
-
-std::function<Slot&(Slot*)> PolicyWithoutOptionalOps::element;
-std::function<int(int)> PolicyWithoutOptionalOps::apply_impl;
-std::function<Slot&(Slot*)> PolicyWithoutOptionalOps::value;
-
-struct PolicyWithOptionalOps : PolicyWithoutOptionalOps {
-  static std::function<void(void*, Slot*, Slot*)> transfer;
-};
-
-std::function<void(void*, Slot*, Slot*)> PolicyWithOptionalOps::transfer;
-
-struct Test : ::testing::Test {
-  Test() {
-    PolicyWithoutOptionalOps::construct = [&](void* a1, Slot* a2, Slot a3) {
-      construct.Call(a1, a2, std::move(a3));
-    };
-    PolicyWithoutOptionalOps::destroy = [&](void* a1, Slot* a2) {
-      destroy.Call(a1, a2);
-    };
-
-    PolicyWithoutOptionalOps::element = [&](Slot* a1) -> Slot& {
-      return element.Call(a1);
-    };
-    PolicyWithoutOptionalOps::apply_impl = [&](int a1) -> int {
-      return apply.Call(a1);
-    };
-    PolicyWithoutOptionalOps::value = [&](Slot* a1) -> Slot& {
-      return value.Call(a1);
-    };
-
-    PolicyWithOptionalOps::transfer = [&](void* a1, Slot* a2, Slot* a3) {
-      return transfer.Call(a1, a2, a3);
-    };
-  }
-
-  std::allocator<int> alloc;
-  int a = 53;
-
-  MockFunction<void(void*, Slot*, Slot)> construct;
-  MockFunction<void(void*, Slot*)> destroy;
-
-  MockFunction<Slot&(Slot*)> element;
-  MockFunction<int(int)> apply;
-  MockFunction<Slot&(Slot*)> value;
-
-  MockFunction<void(void*, Slot*, Slot*)> transfer;
-};
-
-TEST_F(Test, construct) {
-  EXPECT_CALL(construct, Call(&alloc, &a, 53));
-  hash_policy_traits<PolicyWithoutOptionalOps>::construct(&alloc, &a, 53);
-}
-
-TEST_F(Test, destroy) {
-  EXPECT_CALL(destroy, Call(&alloc, &a));
-  hash_policy_traits<PolicyWithoutOptionalOps>::destroy(&alloc, &a);
-}
-
-TEST_F(Test, element) {
-  int b = 0;
-  EXPECT_CALL(element, Call(&a)).WillOnce(ReturnRef(b));
-  EXPECT_EQ(&b, &hash_policy_traits<PolicyWithoutOptionalOps>::element(&a));
-}
-
-TEST_F(Test, apply) {
-  EXPECT_CALL(apply, Call(42)).WillOnce(Return(1337));
-  EXPECT_EQ(1337, (hash_policy_traits<PolicyWithoutOptionalOps>::apply(42)));
-}
-
-TEST_F(Test, value) {
-  int b = 0;
-  EXPECT_CALL(value, Call(&a)).WillOnce(ReturnRef(b));
-  EXPECT_EQ(&b, &hash_policy_traits<PolicyWithoutOptionalOps>::value(&a));
-}
-
-TEST_F(Test, without_transfer) {
-  int b = 42;
-  EXPECT_CALL(element, Call(&b)).WillOnce(::testing::ReturnRef(b));
-  EXPECT_CALL(construct, Call(&alloc, &a, b));
-  EXPECT_CALL(destroy, Call(&alloc, &b));
-  hash_policy_traits<PolicyWithoutOptionalOps>::transfer(&alloc, &a, &b);
-}
-
-TEST_F(Test, with_transfer) {
-  int b = 42;
-  EXPECT_CALL(transfer, Call(&alloc, &a, &b));
-  hash_policy_traits<PolicyWithOptionalOps>::transfer(&alloc, &a, &b);
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/hashtable_debug.h b/third_party/abseil/absl/container/internal/hashtable_debug.h
deleted file mode 100644
index 19d5212..0000000
--- a/third_party/abseil/absl/container/internal/hashtable_debug.h
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This library provides APIs to debug the probing behavior of hash tables.
-//
-// In general, the probing behavior is a black box for users and only the
-// side effects can be measured in the form of performance differences.
-// These APIs give a glimpse on the actual behavior of the probing algorithms in
-// these hashtables given a specified hash function and a set of elements.
-//
-// The probe count distribution can be used to assess the quality of the hash
-// function for that particular hash table. Note that a hash function that
-// performs well in one hash table implementation does not necessarily performs
-// well in a different one.
-//
-// This library supports std::unordered_{set,map}, dense_hash_{set,map} and
-// absl::{flat,node,string}_hash_{set,map}.
-
-#ifndef ABSL_CONTAINER_INTERNAL_HASHTABLE_DEBUG_H_
-#define ABSL_CONTAINER_INTERNAL_HASHTABLE_DEBUG_H_
-
-#include <cstddef>
-#include <algorithm>
-#include <type_traits>
-#include <vector>
-
-#include "absl/container/internal/hashtable_debug_hooks.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// Returns the number of probes required to lookup `key`.  Returns 0 for a
-// search with no collisions.  Higher values mean more hash collisions occurred;
-// however, the exact meaning of this number varies according to the container
-// type.
-template <typename C>
-size_t GetHashtableDebugNumProbes(
-    const C& c, const typename C::key_type& key) {
-  return absl::container_internal::hashtable_debug_internal::
-      HashtableDebugAccess<C>::GetNumProbes(c, key);
-}
-
-// Gets a histogram of the number of probes for each elements in the container.
-// The sum of all the values in the vector is equal to container.size().
-template <typename C>
-std::vector<size_t> GetHashtableDebugNumProbesHistogram(const C& container) {
-  std::vector<size_t> v;
-  for (auto it = container.begin(); it != container.end(); ++it) {
-    size_t num_probes = GetHashtableDebugNumProbes(
-        container,
-        absl::container_internal::hashtable_debug_internal::GetKey<C>(*it, 0));
-    v.resize((std::max)(v.size(), num_probes + 1));
-    v[num_probes]++;
-  }
-  return v;
-}
-
-struct HashtableDebugProbeSummary {
-  size_t total_elements;
-  size_t total_num_probes;
-  double mean;
-};
-
-// Gets a summary of the probe count distribution for the elements in the
-// container.
-template <typename C>
-HashtableDebugProbeSummary GetHashtableDebugProbeSummary(const C& container) {
-  auto probes = GetHashtableDebugNumProbesHistogram(container);
-  HashtableDebugProbeSummary summary = {};
-  for (size_t i = 0; i < probes.size(); ++i) {
-    summary.total_elements += probes[i];
-    summary.total_num_probes += probes[i] * i;
-  }
-  summary.mean = 1.0 * summary.total_num_probes / summary.total_elements;
-  return summary;
-}
-
-// Returns the number of bytes requested from the allocator by the container
-// and not freed.
-template <typename C>
-size_t AllocatedByteSize(const C& c) {
-  return absl::container_internal::hashtable_debug_internal::
-      HashtableDebugAccess<C>::AllocatedByteSize(c);
-}
-
-// Returns a tight lower bound for AllocatedByteSize(c) where `c` is of type `C`
-// and `c.size()` is equal to `num_elements`.
-template <typename C>
-size_t LowerBoundAllocatedByteSize(size_t num_elements) {
-  return absl::container_internal::hashtable_debug_internal::
-      HashtableDebugAccess<C>::LowerBoundAllocatedByteSize(num_elements);
-}
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASHTABLE_DEBUG_H_
diff --git a/third_party/abseil/absl/container/internal/hashtable_debug_hooks.h b/third_party/abseil/absl/container/internal/hashtable_debug_hooks.h
deleted file mode 100644
index 3e9ea59..0000000
--- a/third_party/abseil/absl/container/internal/hashtable_debug_hooks.h
+++ /dev/null
@@ -1,85 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Provides the internal API for hashtable_debug.h.
-
-#ifndef ABSL_CONTAINER_INTERNAL_HASHTABLE_DEBUG_HOOKS_H_
-#define ABSL_CONTAINER_INTERNAL_HASHTABLE_DEBUG_HOOKS_H_
-
-#include <cstddef>
-
-#include <algorithm>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace hashtable_debug_internal {
-
-// If it is a map, call get<0>().
-using std::get;
-template <typename T, typename = typename T::mapped_type>
-auto GetKey(const typename T::value_type& pair, int) -> decltype(get<0>(pair)) {
-  return get<0>(pair);
-}
-
-// If it is not a map, return the value directly.
-template <typename T>
-const typename T::key_type& GetKey(const typename T::key_type& key, char) {
-  return key;
-}
-
-// Containers should specialize this to provide debug information for that
-// container.
-template <class Container, typename Enabler = void>
-struct HashtableDebugAccess {
-  // Returns the number of probes required to find `key` in `c`.  The "number of
-  // probes" is a concept that can vary by container.  Implementations should
-  // return 0 when `key` was found in the minimum number of operations and
-  // should increment the result for each non-trivial operation required to find
-  // `key`.
-  //
-  // The default implementation uses the bucket api from the standard and thus
-  // works for `std::unordered_*` containers.
-  static size_t GetNumProbes(const Container& c,
-                             const typename Container::key_type& key) {
-    if (!c.bucket_count()) return {};
-    size_t num_probes = 0;
-    size_t bucket = c.bucket(key);
-    for (auto it = c.begin(bucket), e = c.end(bucket);; ++it, ++num_probes) {
-      if (it == e) return num_probes;
-      if (c.key_eq()(key, GetKey<Container>(*it, 0))) return num_probes;
-    }
-  }
-
-  // Returns the number of bytes requested from the allocator by the container
-  // and not freed.
-  //
-  // static size_t AllocatedByteSize(const Container& c);
-
-  // Returns a tight lower bound for AllocatedByteSize(c) where `c` is of type
-  // `Container` and `c.size()` is equal to `num_elements`.
-  //
-  // static size_t LowerBoundAllocatedByteSize(size_t num_elements);
-};
-
-}  // namespace hashtable_debug_internal
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASHTABLE_DEBUG_HOOKS_H_
diff --git a/third_party/abseil/absl/container/internal/hashtablez_sampler.cc b/third_party/abseil/absl/container/internal/hashtablez_sampler.cc
deleted file mode 100644
index e4484fb..0000000
--- a/third_party/abseil/absl/container/internal/hashtablez_sampler.cc
+++ /dev/null
@@ -1,270 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hashtablez_sampler.h"
-
-#include <atomic>
-#include <cassert>
-#include <cmath>
-#include <functional>
-#include <limits>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/exponential_biased.h"
-#include "absl/container/internal/have_sse.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/memory/memory.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-constexpr int HashtablezInfo::kMaxStackDepth;
-
-namespace {
-ABSL_CONST_INIT std::atomic<bool> g_hashtablez_enabled{
-    false
-};
-ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_sample_parameter{1 << 10};
-ABSL_CONST_INIT std::atomic<int32_t> g_hashtablez_max_samples{1 << 20};
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-ABSL_PER_THREAD_TLS_KEYWORD absl::base_internal::ExponentialBiased
-    g_exponential_biased_generator;
-#endif
-
-}  // namespace
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample = 0;
-#endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-
-HashtablezSampler& HashtablezSampler::Global() {
-  static auto* sampler = new HashtablezSampler();
-  return *sampler;
-}
-
-HashtablezSampler::DisposeCallback HashtablezSampler::SetDisposeCallback(
-    DisposeCallback f) {
-  return dispose_.exchange(f, std::memory_order_relaxed);
-}
-
-HashtablezInfo::HashtablezInfo() { PrepareForSampling(); }
-HashtablezInfo::~HashtablezInfo() = default;
-
-void HashtablezInfo::PrepareForSampling() {
-  capacity.store(0, std::memory_order_relaxed);
-  size.store(0, std::memory_order_relaxed);
-  num_erases.store(0, std::memory_order_relaxed);
-  num_rehashes.store(0, std::memory_order_relaxed);
-  max_probe_length.store(0, std::memory_order_relaxed);
-  total_probe_length.store(0, std::memory_order_relaxed);
-  hashes_bitwise_or.store(0, std::memory_order_relaxed);
-  hashes_bitwise_and.store(~size_t{}, std::memory_order_relaxed);
-
-  create_time = absl::Now();
-  // The inliner makes hardcoded skip_count difficult (especially when combined
-  // with LTO).  We use the ability to exclude stacks by regex when encoding
-  // instead.
-  depth = absl::GetStackTrace(stack, HashtablezInfo::kMaxStackDepth,
-                              /* skip_count= */ 0);
-  dead = nullptr;
-}
-
-HashtablezSampler::HashtablezSampler()
-    : dropped_samples_(0), size_estimate_(0), all_(nullptr), dispose_(nullptr) {
-  absl::MutexLock l(&graveyard_.init_mu);
-  graveyard_.dead = &graveyard_;
-}
-
-HashtablezSampler::~HashtablezSampler() {
-  HashtablezInfo* s = all_.load(std::memory_order_acquire);
-  while (s != nullptr) {
-    HashtablezInfo* next = s->next;
-    delete s;
-    s = next;
-  }
-}
-
-void HashtablezSampler::PushNew(HashtablezInfo* sample) {
-  sample->next = all_.load(std::memory_order_relaxed);
-  while (!all_.compare_exchange_weak(sample->next, sample,
-                                     std::memory_order_release,
-                                     std::memory_order_relaxed)) {
-  }
-}
-
-void HashtablezSampler::PushDead(HashtablezInfo* sample) {
-  if (auto* dispose = dispose_.load(std::memory_order_relaxed)) {
-    dispose(*sample);
-  }
-
-  absl::MutexLock graveyard_lock(&graveyard_.init_mu);
-  absl::MutexLock sample_lock(&sample->init_mu);
-  sample->dead = graveyard_.dead;
-  graveyard_.dead = sample;
-}
-
-HashtablezInfo* HashtablezSampler::PopDead() {
-  absl::MutexLock graveyard_lock(&graveyard_.init_mu);
-
-  // The list is circular, so eventually it collapses down to
-  //   graveyard_.dead == &graveyard_
-  // when it is empty.
-  HashtablezInfo* sample = graveyard_.dead;
-  if (sample == &graveyard_) return nullptr;
-
-  absl::MutexLock sample_lock(&sample->init_mu);
-  graveyard_.dead = sample->dead;
-  sample->PrepareForSampling();
-  return sample;
-}
-
-HashtablezInfo* HashtablezSampler::Register() {
-  int64_t size = size_estimate_.fetch_add(1, std::memory_order_relaxed);
-  if (size > g_hashtablez_max_samples.load(std::memory_order_relaxed)) {
-    size_estimate_.fetch_sub(1, std::memory_order_relaxed);
-    dropped_samples_.fetch_add(1, std::memory_order_relaxed);
-    return nullptr;
-  }
-
-  HashtablezInfo* sample = PopDead();
-  if (sample == nullptr) {
-    // Resurrection failed.  Hire a new warlock.
-    sample = new HashtablezInfo();
-    PushNew(sample);
-  }
-
-  return sample;
-}
-
-void HashtablezSampler::Unregister(HashtablezInfo* sample) {
-  PushDead(sample);
-  size_estimate_.fetch_sub(1, std::memory_order_relaxed);
-}
-
-int64_t HashtablezSampler::Iterate(
-    const std::function<void(const HashtablezInfo& stack)>& f) {
-  HashtablezInfo* s = all_.load(std::memory_order_acquire);
-  while (s != nullptr) {
-    absl::MutexLock l(&s->init_mu);
-    if (s->dead == nullptr) {
-      f(*s);
-    }
-    s = s->next;
-  }
-
-  return dropped_samples_.load(std::memory_order_relaxed);
-}
-
-static bool ShouldForceSampling() {
-  enum ForceState {
-    kDontForce,
-    kForce,
-    kUninitialized
-  };
-  ABSL_CONST_INIT static std::atomic<ForceState> global_state{
-      kUninitialized};
-  ForceState state = global_state.load(std::memory_order_relaxed);
-  if (ABSL_PREDICT_TRUE(state == kDontForce)) return false;
-
-  if (state == kUninitialized) {
-    state = AbslContainerInternalSampleEverything() ? kForce : kDontForce;
-    global_state.store(state, std::memory_order_relaxed);
-  }
-  return state == kForce;
-}
-
-HashtablezInfo* SampleSlow(int64_t* next_sample) {
-  if (ABSL_PREDICT_FALSE(ShouldForceSampling())) {
-    *next_sample = 1;
-    return HashtablezSampler::Global().Register();
-  }
-
-#if !defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-  *next_sample = std::numeric_limits<int64_t>::max();
-  return nullptr;
-#else
-  bool first = *next_sample < 0;
-  *next_sample = g_exponential_biased_generator.GetStride(
-      g_hashtablez_sample_parameter.load(std::memory_order_relaxed));
-  // Small values of interval are equivalent to just sampling next time.
-  ABSL_ASSERT(*next_sample >= 1);
-
-  // g_hashtablez_enabled can be dynamically flipped, we need to set a threshold
-  // low enough that we will start sampling in a reasonable time, so we just use
-  // the default sampling rate.
-  if (!g_hashtablez_enabled.load(std::memory_order_relaxed)) return nullptr;
-
-  // We will only be negative on our first count, so we should just retry in
-  // that case.
-  if (first) {
-    if (ABSL_PREDICT_TRUE(--*next_sample > 0)) return nullptr;
-    return SampleSlow(next_sample);
-  }
-
-  return HashtablezSampler::Global().Register();
-#endif
-}
-
-void UnsampleSlow(HashtablezInfo* info) {
-  HashtablezSampler::Global().Unregister(info);
-}
-
-void RecordInsertSlow(HashtablezInfo* info, size_t hash,
-                      size_t distance_from_desired) {
-  // SwissTables probe in groups of 16, so scale this to count items probes and
-  // not offset from desired.
-  size_t probe_length = distance_from_desired;
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-  probe_length /= 16;
-#else
-  probe_length /= 8;
-#endif
-
-  info->hashes_bitwise_and.fetch_and(hash, std::memory_order_relaxed);
-  info->hashes_bitwise_or.fetch_or(hash, std::memory_order_relaxed);
-  info->max_probe_length.store(
-      std::max(info->max_probe_length.load(std::memory_order_relaxed),
-               probe_length),
-      std::memory_order_relaxed);
-  info->total_probe_length.fetch_add(probe_length, std::memory_order_relaxed);
-  info->size.fetch_add(1, std::memory_order_relaxed);
-}
-
-void SetHashtablezEnabled(bool enabled) {
-  g_hashtablez_enabled.store(enabled, std::memory_order_release);
-}
-
-void SetHashtablezSampleParameter(int32_t rate) {
-  if (rate > 0) {
-    g_hashtablez_sample_parameter.store(rate, std::memory_order_release);
-  } else {
-    ABSL_RAW_LOG(ERROR, "Invalid hashtablez sample rate: %lld",
-                 static_cast<long long>(rate));  // NOLINT(runtime/int)
-  }
-}
-
-void SetHashtablezMaxSamples(int32_t max) {
-  if (max > 0) {
-    g_hashtablez_max_samples.store(max, std::memory_order_release);
-  } else {
-    ABSL_RAW_LOG(ERROR, "Invalid hashtablez max samples: %lld",
-                 static_cast<long long>(max));  // NOLINT(runtime/int)
-  }
-}
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/hashtablez_sampler.h b/third_party/abseil/absl/container/internal/hashtablez_sampler.h
deleted file mode 100644
index 394348d..0000000
--- a/third_party/abseil/absl/container/internal/hashtablez_sampler.h
+++ /dev/null
@@ -1,321 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: hashtablez_sampler.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the API for a low level library to sample hashtables
-// and collect runtime statistics about them.
-//
-// `HashtablezSampler` controls the lifecycle of `HashtablezInfo` objects which
-// store information about a single sample.
-//
-// `Record*` methods store information into samples.
-// `Sample()` and `Unsample()` make use of a single global sampler with
-// properties controlled by the flags hashtablez_enabled,
-// hashtablez_sample_rate, and hashtablez_max_samples.
-//
-// WARNING
-//
-// Using this sampling API may cause sampled Swiss tables to use the global
-// allocator (operator `new`) in addition to any custom allocator.  If you
-// are using a table in an unusual circumstance where allocation or calling a
-// linux syscall is unacceptable, this could interfere.
-//
-// This utility is internal-only. Use at your own risk.
-
-#ifndef ABSL_CONTAINER_INTERNAL_HASHTABLEZ_SAMPLER_H_
-#define ABSL_CONTAINER_INTERNAL_HASHTABLEZ_SAMPLER_H_
-
-#include <atomic>
-#include <functional>
-#include <memory>
-#include <vector>
-
-#include "absl/base/internal/per_thread_tls.h"
-#include "absl/base/optimization.h"
-#include "absl/container/internal/have_sse.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// Stores information about a sampled hashtable.  All mutations to this *must*
-// be made through `Record*` functions below.  All reads from this *must* only
-// occur in the callback to `HashtablezSampler::Iterate`.
-struct HashtablezInfo {
-  // Constructs the object but does not fill in any fields.
-  HashtablezInfo();
-  ~HashtablezInfo();
-  HashtablezInfo(const HashtablezInfo&) = delete;
-  HashtablezInfo& operator=(const HashtablezInfo&) = delete;
-
-  // Puts the object into a clean state, fills in the logically `const` members,
-  // blocking for any readers that are currently sampling the object.
-  void PrepareForSampling() ABSL_EXCLUSIVE_LOCKS_REQUIRED(init_mu);
-
-  // These fields are mutated by the various Record* APIs and need to be
-  // thread-safe.
-  std::atomic<size_t> capacity;
-  std::atomic<size_t> size;
-  std::atomic<size_t> num_erases;
-  std::atomic<size_t> num_rehashes;
-  std::atomic<size_t> max_probe_length;
-  std::atomic<size_t> total_probe_length;
-  std::atomic<size_t> hashes_bitwise_or;
-  std::atomic<size_t> hashes_bitwise_and;
-
-  // `HashtablezSampler` maintains intrusive linked lists for all samples.  See
-  // comments on `HashtablezSampler::all_` for details on these.  `init_mu`
-  // guards the ability to restore the sample to a pristine state.  This
-  // prevents races with sampling and resurrecting an object.
-  absl::Mutex init_mu;
-  HashtablezInfo* next;
-  HashtablezInfo* dead ABSL_GUARDED_BY(init_mu);
-
-  // All of the fields below are set by `PrepareForSampling`, they must not be
-  // mutated in `Record*` functions.  They are logically `const` in that sense.
-  // These are guarded by init_mu, but that is not externalized to clients, who
-  // can only read them during `HashtablezSampler::Iterate` which will hold the
-  // lock.
-  static constexpr int kMaxStackDepth = 64;
-  absl::Time create_time;
-  int32_t depth;
-  void* stack[kMaxStackDepth];
-};
-
-inline void RecordRehashSlow(HashtablezInfo* info, size_t total_probe_length) {
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-  total_probe_length /= 16;
-#else
-  total_probe_length /= 8;
-#endif
-  info->total_probe_length.store(total_probe_length, std::memory_order_relaxed);
-  info->num_erases.store(0, std::memory_order_relaxed);
-  // There is only one concurrent writer, so `load` then `store` is sufficient
-  // instead of using `fetch_add`.
-  info->num_rehashes.store(
-      1 + info->num_rehashes.load(std::memory_order_relaxed),
-      std::memory_order_relaxed);
-}
-
-inline void RecordStorageChangedSlow(HashtablezInfo* info, size_t size,
-                                     size_t capacity) {
-  info->size.store(size, std::memory_order_relaxed);
-  info->capacity.store(capacity, std::memory_order_relaxed);
-  if (size == 0) {
-    // This is a clear, reset the total/num_erases too.
-    info->total_probe_length.store(0, std::memory_order_relaxed);
-    info->num_erases.store(0, std::memory_order_relaxed);
-  }
-}
-
-void RecordInsertSlow(HashtablezInfo* info, size_t hash,
-                      size_t distance_from_desired);
-
-inline void RecordEraseSlow(HashtablezInfo* info) {
-  info->size.fetch_sub(1, std::memory_order_relaxed);
-  // There is only one concurrent writer, so `load` then `store` is sufficient
-  // instead of using `fetch_add`.
-  info->num_erases.store(
-      1 + info->num_erases.load(std::memory_order_relaxed),
-      std::memory_order_relaxed);
-}
-
-HashtablezInfo* SampleSlow(int64_t* next_sample);
-void UnsampleSlow(HashtablezInfo* info);
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-#error ABSL_INTERNAL_HASHTABLEZ_SAMPLE cannot be directly set
-#endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-class HashtablezInfoHandle {
- public:
-  explicit HashtablezInfoHandle() : info_(nullptr) {}
-  explicit HashtablezInfoHandle(HashtablezInfo* info) : info_(info) {}
-  ~HashtablezInfoHandle() {
-    if (ABSL_PREDICT_TRUE(info_ == nullptr)) return;
-    UnsampleSlow(info_);
-  }
-
-  HashtablezInfoHandle(const HashtablezInfoHandle&) = delete;
-  HashtablezInfoHandle& operator=(const HashtablezInfoHandle&) = delete;
-
-  HashtablezInfoHandle(HashtablezInfoHandle&& o) noexcept
-      : info_(absl::exchange(o.info_, nullptr)) {}
-  HashtablezInfoHandle& operator=(HashtablezInfoHandle&& o) noexcept {
-    if (ABSL_PREDICT_FALSE(info_ != nullptr)) {
-      UnsampleSlow(info_);
-    }
-    info_ = absl::exchange(o.info_, nullptr);
-    return *this;
-  }
-
-  inline void RecordStorageChanged(size_t size, size_t capacity) {
-    if (ABSL_PREDICT_TRUE(info_ == nullptr)) return;
-    RecordStorageChangedSlow(info_, size, capacity);
-  }
-
-  inline void RecordRehash(size_t total_probe_length) {
-    if (ABSL_PREDICT_TRUE(info_ == nullptr)) return;
-    RecordRehashSlow(info_, total_probe_length);
-  }
-
-  inline void RecordInsert(size_t hash, size_t distance_from_desired) {
-    if (ABSL_PREDICT_TRUE(info_ == nullptr)) return;
-    RecordInsertSlow(info_, hash, distance_from_desired);
-  }
-
-  inline void RecordErase() {
-    if (ABSL_PREDICT_TRUE(info_ == nullptr)) return;
-    RecordEraseSlow(info_);
-  }
-
-  friend inline void swap(HashtablezInfoHandle& lhs,
-                          HashtablezInfoHandle& rhs) {
-    std::swap(lhs.info_, rhs.info_);
-  }
-
- private:
-  friend class HashtablezInfoHandlePeer;
-  HashtablezInfo* info_;
-};
-#else
-// Ensure that when Hashtablez is turned off at compile time, HashtablezInfo can
-// be removed by the linker, in order to reduce the binary size.
-class HashtablezInfoHandle {
- public:
-  explicit HashtablezInfoHandle() = default;
-  explicit HashtablezInfoHandle(std::nullptr_t) {}
-
-  inline void RecordStorageChanged(size_t /*size*/, size_t /*capacity*/) {}
-  inline void RecordRehash(size_t /*total_probe_length*/) {}
-  inline void RecordInsert(size_t /*hash*/, size_t /*distance_from_desired*/) {}
-  inline void RecordErase() {}
-
-  friend inline void swap(HashtablezInfoHandle& /*lhs*/,
-                          HashtablezInfoHandle& /*rhs*/) {}
-};
-#endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-extern ABSL_PER_THREAD_TLS_KEYWORD int64_t global_next_sample;
-#endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-
-// Returns an RAII sampling handle that manages registration and unregistation
-// with the global sampler.
-inline HashtablezInfoHandle Sample() {
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-  if (ABSL_PREDICT_TRUE(--global_next_sample > 0)) {
-    return HashtablezInfoHandle(nullptr);
-  }
-  return HashtablezInfoHandle(SampleSlow(&global_next_sample));
-#else
-  return HashtablezInfoHandle(nullptr);
-#endif  // !ABSL_PER_THREAD_TLS
-}
-
-// Holds samples and their associated stack traces with a soft limit of
-// `SetHashtablezMaxSamples()`.
-//
-// Thread safe.
-class HashtablezSampler {
- public:
-  // Returns a global Sampler.
-  static HashtablezSampler& Global();
-
-  HashtablezSampler();
-  ~HashtablezSampler();
-
-  // Registers for sampling.  Returns an opaque registration info.
-  HashtablezInfo* Register();
-
-  // Unregisters the sample.
-  void Unregister(HashtablezInfo* sample);
-
-  // The dispose callback will be called on all samples the moment they are
-  // being unregistered. Only affects samples that are unregistered after the
-  // callback has been set.
-  // Returns the previous callback.
-  using DisposeCallback = void (*)(const HashtablezInfo&);
-  DisposeCallback SetDisposeCallback(DisposeCallback f);
-
-  // Iterates over all the registered `StackInfo`s.  Returning the number of
-  // samples that have been dropped.
-  int64_t Iterate(const std::function<void(const HashtablezInfo& stack)>& f);
-
- private:
-  void PushNew(HashtablezInfo* sample);
-  void PushDead(HashtablezInfo* sample);
-  HashtablezInfo* PopDead();
-
-  std::atomic<size_t> dropped_samples_;
-  std::atomic<size_t> size_estimate_;
-
-  // Intrusive lock free linked lists for tracking samples.
-  //
-  // `all_` records all samples (they are never removed from this list) and is
-  // terminated with a `nullptr`.
-  //
-  // `graveyard_.dead` is a circular linked list.  When it is empty,
-  // `graveyard_.dead == &graveyard`.  The list is circular so that
-  // every item on it (even the last) has a non-null dead pointer.  This allows
-  // `Iterate` to determine if a given sample is live or dead using only
-  // information on the sample itself.
-  //
-  // For example, nodes [A, B, C, D, E] with [A, C, E] alive and [B, D] dead
-  // looks like this (G is the Graveyard):
-  //
-  //           +---+    +---+    +---+    +---+    +---+
-  //    all -->| A |--->| B |--->| C |--->| D |--->| E |
-  //           |   |    |   |    |   |    |   |    |   |
-  //   +---+   |   | +->|   |-+  |   | +->|   |-+  |   |
-  //   | G |   +---+ |  +---+ |  +---+ |  +---+ |  +---+
-  //   |   |         |        |        |        |
-  //   |   | --------+        +--------+        |
-  //   +---+                                    |
-  //     ^                                      |
-  //     +--------------------------------------+
-  //
-  std::atomic<HashtablezInfo*> all_;
-  HashtablezInfo graveyard_;
-
-  std::atomic<DisposeCallback> dispose_;
-};
-
-// Enables or disables sampling for Swiss tables.
-void SetHashtablezEnabled(bool enabled);
-
-// Sets the rate at which Swiss tables will be sampled.
-void SetHashtablezSampleParameter(int32_t rate);
-
-// Sets a soft max for the number of samples that will be kept.
-void SetHashtablezMaxSamples(int32_t max);
-
-// Configuration override.
-// This allows process-wide sampling without depending on order of
-// initialization of static storage duration objects.
-// The definition of this constant is weak, which allows us to inject a
-// different value for it at link time.
-extern "C" bool AbslContainerInternalSampleEverything();
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_HASHTABLEZ_SAMPLER_H_
diff --git a/third_party/abseil/absl/container/internal/hashtablez_sampler_force_weak_definition.cc b/third_party/abseil/absl/container/internal/hashtablez_sampler_force_weak_definition.cc
deleted file mode 100644
index 78b9d36..0000000
--- a/third_party/abseil/absl/container/internal/hashtablez_sampler_force_weak_definition.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hashtablez_sampler.h"
-
-#include "absl/base/attributes.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// See hashtablez_sampler.h for details.
-extern "C" ABSL_ATTRIBUTE_WEAK bool AbslContainerInternalSampleEverything() {
-  return false;
-}
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/hashtablez_sampler_test.cc b/third_party/abseil/absl/container/internal/hashtablez_sampler_test.cc
deleted file mode 100644
index 8d10a1e..0000000
--- a/third_party/abseil/absl/container/internal/hashtablez_sampler_test.cc
+++ /dev/null
@@ -1,371 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/hashtablez_sampler.h"
-
-#include <atomic>
-#include <limits>
-#include <random>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/container/internal/have_sse.h"
-#include "absl/synchronization/blocking_counter.h"
-#include "absl/synchronization/internal/thread_pool.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/synchronization/notification.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-constexpr int kProbeLength = 16;
-#else
-constexpr int kProbeLength = 8;
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-class HashtablezInfoHandlePeer {
- public:
-  static bool IsSampled(const HashtablezInfoHandle& h) {
-    return h.info_ != nullptr;
-  }
-
-  static HashtablezInfo* GetInfo(HashtablezInfoHandle* h) { return h->info_; }
-};
-#else
-class HashtablezInfoHandlePeer {
- public:
-  static bool IsSampled(const HashtablezInfoHandle&) { return false; }
-  static HashtablezInfo* GetInfo(HashtablezInfoHandle*) { return nullptr; }
-};
-#endif  // defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-
-namespace {
-using ::absl::synchronization_internal::ThreadPool;
-using ::testing::IsEmpty;
-using ::testing::UnorderedElementsAre;
-
-std::vector<size_t> GetSizes(HashtablezSampler* s) {
-  std::vector<size_t> res;
-  s->Iterate([&](const HashtablezInfo& info) {
-    res.push_back(info.size.load(std::memory_order_acquire));
-  });
-  return res;
-}
-
-HashtablezInfo* Register(HashtablezSampler* s, size_t size) {
-  auto* info = s->Register();
-  assert(info != nullptr);
-  info->size.store(size);
-  return info;
-}
-
-TEST(HashtablezInfoTest, PrepareForSampling) {
-  absl::Time test_start = absl::Now();
-  HashtablezInfo info;
-  absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-
-  EXPECT_EQ(info.capacity.load(), 0);
-  EXPECT_EQ(info.size.load(), 0);
-  EXPECT_EQ(info.num_erases.load(), 0);
-  EXPECT_EQ(info.num_rehashes.load(), 0);
-  EXPECT_EQ(info.max_probe_length.load(), 0);
-  EXPECT_EQ(info.total_probe_length.load(), 0);
-  EXPECT_EQ(info.hashes_bitwise_or.load(), 0);
-  EXPECT_EQ(info.hashes_bitwise_and.load(), ~size_t{});
-  EXPECT_GE(info.create_time, test_start);
-
-  info.capacity.store(1, std::memory_order_relaxed);
-  info.size.store(1, std::memory_order_relaxed);
-  info.num_erases.store(1, std::memory_order_relaxed);
-  info.max_probe_length.store(1, std::memory_order_relaxed);
-  info.total_probe_length.store(1, std::memory_order_relaxed);
-  info.hashes_bitwise_or.store(1, std::memory_order_relaxed);
-  info.hashes_bitwise_and.store(1, std::memory_order_relaxed);
-  info.create_time = test_start - absl::Hours(20);
-
-  info.PrepareForSampling();
-  EXPECT_EQ(info.capacity.load(), 0);
-  EXPECT_EQ(info.size.load(), 0);
-  EXPECT_EQ(info.num_erases.load(), 0);
-  EXPECT_EQ(info.num_rehashes.load(), 0);
-  EXPECT_EQ(info.max_probe_length.load(), 0);
-  EXPECT_EQ(info.total_probe_length.load(), 0);
-  EXPECT_EQ(info.hashes_bitwise_or.load(), 0);
-  EXPECT_EQ(info.hashes_bitwise_and.load(), ~size_t{});
-  EXPECT_GE(info.create_time, test_start);
-}
-
-TEST(HashtablezInfoTest, RecordStorageChanged) {
-  HashtablezInfo info;
-  absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-  RecordStorageChangedSlow(&info, 17, 47);
-  EXPECT_EQ(info.size.load(), 17);
-  EXPECT_EQ(info.capacity.load(), 47);
-  RecordStorageChangedSlow(&info, 20, 20);
-  EXPECT_EQ(info.size.load(), 20);
-  EXPECT_EQ(info.capacity.load(), 20);
-}
-
-TEST(HashtablezInfoTest, RecordInsert) {
-  HashtablezInfo info;
-  absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-  EXPECT_EQ(info.max_probe_length.load(), 0);
-  RecordInsertSlow(&info, 0x0000FF00, 6 * kProbeLength);
-  EXPECT_EQ(info.max_probe_length.load(), 6);
-  EXPECT_EQ(info.hashes_bitwise_and.load(), 0x0000FF00);
-  EXPECT_EQ(info.hashes_bitwise_or.load(), 0x0000FF00);
-  RecordInsertSlow(&info, 0x000FF000, 4 * kProbeLength);
-  EXPECT_EQ(info.max_probe_length.load(), 6);
-  EXPECT_EQ(info.hashes_bitwise_and.load(), 0x0000F000);
-  EXPECT_EQ(info.hashes_bitwise_or.load(), 0x000FFF00);
-  RecordInsertSlow(&info, 0x00FF0000, 12 * kProbeLength);
-  EXPECT_EQ(info.max_probe_length.load(), 12);
-  EXPECT_EQ(info.hashes_bitwise_and.load(), 0x00000000);
-  EXPECT_EQ(info.hashes_bitwise_or.load(), 0x00FFFF00);
-}
-
-TEST(HashtablezInfoTest, RecordErase) {
-  HashtablezInfo info;
-  absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-  EXPECT_EQ(info.num_erases.load(), 0);
-  EXPECT_EQ(info.size.load(), 0);
-  RecordInsertSlow(&info, 0x0000FF00, 6 * kProbeLength);
-  EXPECT_EQ(info.size.load(), 1);
-  RecordEraseSlow(&info);
-  EXPECT_EQ(info.size.load(), 0);
-  EXPECT_EQ(info.num_erases.load(), 1);
-}
-
-TEST(HashtablezInfoTest, RecordRehash) {
-  HashtablezInfo info;
-  absl::MutexLock l(&info.init_mu);
-  info.PrepareForSampling();
-  RecordInsertSlow(&info, 0x1, 0);
-  RecordInsertSlow(&info, 0x2, kProbeLength);
-  RecordInsertSlow(&info, 0x4, kProbeLength);
-  RecordInsertSlow(&info, 0x8, 2 * kProbeLength);
-  EXPECT_EQ(info.size.load(), 4);
-  EXPECT_EQ(info.total_probe_length.load(), 4);
-
-  RecordEraseSlow(&info);
-  RecordEraseSlow(&info);
-  EXPECT_EQ(info.size.load(), 2);
-  EXPECT_EQ(info.total_probe_length.load(), 4);
-  EXPECT_EQ(info.num_erases.load(), 2);
-
-  RecordRehashSlow(&info, 3 * kProbeLength);
-  EXPECT_EQ(info.size.load(), 2);
-  EXPECT_EQ(info.total_probe_length.load(), 3);
-  EXPECT_EQ(info.num_erases.load(), 0);
-  EXPECT_EQ(info.num_rehashes.load(), 1);
-}
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-TEST(HashtablezSamplerTest, SmallSampleParameter) {
-  SetHashtablezEnabled(true);
-  SetHashtablezSampleParameter(100);
-
-  for (int i = 0; i < 1000; ++i) {
-    int64_t next_sample = 0;
-    HashtablezInfo* sample = SampleSlow(&next_sample);
-    EXPECT_GT(next_sample, 0);
-    EXPECT_NE(sample, nullptr);
-    UnsampleSlow(sample);
-  }
-}
-
-TEST(HashtablezSamplerTest, LargeSampleParameter) {
-  SetHashtablezEnabled(true);
-  SetHashtablezSampleParameter(std::numeric_limits<int32_t>::max());
-
-  for (int i = 0; i < 1000; ++i) {
-    int64_t next_sample = 0;
-    HashtablezInfo* sample = SampleSlow(&next_sample);
-    EXPECT_GT(next_sample, 0);
-    EXPECT_NE(sample, nullptr);
-    UnsampleSlow(sample);
-  }
-}
-
-TEST(HashtablezSamplerTest, Sample) {
-  SetHashtablezEnabled(true);
-  SetHashtablezSampleParameter(100);
-  int64_t num_sampled = 0;
-  int64_t total = 0;
-  double sample_rate = 0.0;
-  for (int i = 0; i < 1000000; ++i) {
-    HashtablezInfoHandle h = Sample();
-    ++total;
-    if (HashtablezInfoHandlePeer::IsSampled(h)) {
-      ++num_sampled;
-    }
-    sample_rate = static_cast<double>(num_sampled) / total;
-    if (0.005 < sample_rate && sample_rate < 0.015) break;
-  }
-  EXPECT_NEAR(sample_rate, 0.01, 0.005);
-}
-
-TEST(HashtablezSamplerTest, Handle) {
-  auto& sampler = HashtablezSampler::Global();
-  HashtablezInfoHandle h(sampler.Register());
-  auto* info = HashtablezInfoHandlePeer::GetInfo(&h);
-  info->hashes_bitwise_and.store(0x12345678, std::memory_order_relaxed);
-
-  bool found = false;
-  sampler.Iterate([&](const HashtablezInfo& h) {
-    if (&h == info) {
-      EXPECT_EQ(h.hashes_bitwise_and.load(), 0x12345678);
-      found = true;
-    }
-  });
-  EXPECT_TRUE(found);
-
-  h = HashtablezInfoHandle();
-  found = false;
-  sampler.Iterate([&](const HashtablezInfo& h) {
-    if (&h == info) {
-      // this will only happen if some other thread has resurrected the info
-      // the old handle was using.
-      if (h.hashes_bitwise_and.load() == 0x12345678) {
-        found = true;
-      }
-    }
-  });
-  EXPECT_FALSE(found);
-}
-#endif
-
-
-TEST(HashtablezSamplerTest, Registration) {
-  HashtablezSampler sampler;
-  auto* info1 = Register(&sampler, 1);
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(1));
-
-  auto* info2 = Register(&sampler, 2);
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(1, 2));
-  info1->size.store(3);
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(3, 2));
-
-  sampler.Unregister(info1);
-  sampler.Unregister(info2);
-}
-
-TEST(HashtablezSamplerTest, Unregistration) {
-  HashtablezSampler sampler;
-  std::vector<HashtablezInfo*> infos;
-  for (size_t i = 0; i < 3; ++i) {
-    infos.push_back(Register(&sampler, i));
-  }
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 1, 2));
-
-  sampler.Unregister(infos[1]);
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 2));
-
-  infos.push_back(Register(&sampler, 3));
-  infos.push_back(Register(&sampler, 4));
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 2, 3, 4));
-  sampler.Unregister(infos[3]);
-  EXPECT_THAT(GetSizes(&sampler), UnorderedElementsAre(0, 2, 4));
-
-  sampler.Unregister(infos[0]);
-  sampler.Unregister(infos[2]);
-  sampler.Unregister(infos[4]);
-  EXPECT_THAT(GetSizes(&sampler), IsEmpty());
-}
-
-TEST(HashtablezSamplerTest, MultiThreaded) {
-  HashtablezSampler sampler;
-  Notification stop;
-  ThreadPool pool(10);
-
-  for (int i = 0; i < 10; ++i) {
-    pool.Schedule([&sampler, &stop]() {
-      std::random_device rd;
-      std::mt19937 gen(rd());
-
-      std::vector<HashtablezInfo*> infoz;
-      while (!stop.HasBeenNotified()) {
-        if (infoz.empty()) {
-          infoz.push_back(sampler.Register());
-        }
-        switch (std::uniform_int_distribution<>(0, 2)(gen)) {
-          case 0: {
-            infoz.push_back(sampler.Register());
-            break;
-          }
-          case 1: {
-            size_t p =
-                std::uniform_int_distribution<>(0, infoz.size() - 1)(gen);
-            HashtablezInfo* info = infoz[p];
-            infoz[p] = infoz.back();
-            infoz.pop_back();
-            sampler.Unregister(info);
-            break;
-          }
-          case 2: {
-            absl::Duration oldest = absl::ZeroDuration();
-            sampler.Iterate([&](const HashtablezInfo& info) {
-              oldest = std::max(oldest, absl::Now() - info.create_time);
-            });
-            ASSERT_GE(oldest, absl::ZeroDuration());
-            break;
-          }
-        }
-      }
-    });
-  }
-  // The threads will hammer away.  Give it a little bit of time for tsan to
-  // spot errors.
-  absl::SleepFor(absl::Seconds(3));
-  stop.Notify();
-}
-
-TEST(HashtablezSamplerTest, Callback) {
-  HashtablezSampler sampler;
-
-  auto* info1 = Register(&sampler, 1);
-  auto* info2 = Register(&sampler, 2);
-
-  static const HashtablezInfo* expected;
-
-  auto callback = [](const HashtablezInfo& info) {
-    // We can't use `info` outside of this callback because the object will be
-    // disposed as soon as we return from here.
-    EXPECT_EQ(&info, expected);
-  };
-
-  // Set the callback.
-  EXPECT_EQ(sampler.SetDisposeCallback(callback), nullptr);
-  expected = info1;
-  sampler.Unregister(info1);
-
-  // Unset the callback.
-  EXPECT_EQ(callback, sampler.SetDisposeCallback(nullptr));
-  expected = nullptr;  // no more calls.
-  sampler.Unregister(info2);
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/have_sse.h b/third_party/abseil/absl/container/internal/have_sse.h
deleted file mode 100644
index e75e1a1..0000000
--- a/third_party/abseil/absl/container/internal/have_sse.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Shared config probing for SSE instructions used in Swiss tables.
-#ifndef ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
-#define ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
-
-#ifndef ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-#if defined(__SSE2__) ||  \
-    (defined(_MSC_VER) && \
-     (defined(_M_X64) || (defined(_M_IX86) && _M_IX86_FP >= 2)))
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2 1
-#else
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2 0
-#endif
-#endif
-
-#ifndef ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
-#ifdef __SSSE3__
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3 1
-#else
-#define ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3 0
-#endif
-#endif
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3 && \
-    !ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-#error "Bad configuration!"
-#endif
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-#include <emmintrin.h>
-#endif
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
-#include <tmmintrin.h>
-#endif
-
-#endif  // ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
diff --git a/third_party/abseil/absl/container/internal/inlined_vector.h b/third_party/abseil/absl/container/internal/inlined_vector.h
deleted file mode 100644
index 120849c..0000000
--- a/third_party/abseil/absl/container/internal/inlined_vector.h
+++ /dev/null
@@ -1,907 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
-#define ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
-
-#include <algorithm>
-#include <cstddef>
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <utility>
-
-#include "absl/base/macros.h"
-#include "absl/container/internal/compressed_tuple.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace inlined_vector_internal {
-
-// GCC does not deal very well with the below code
-#if !defined(__clang__) && defined(__GNUC__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
-#endif
-
-template <typename Iterator>
-using IsAtLeastForwardIterator = std::is_convertible<
-    typename std::iterator_traits<Iterator>::iterator_category,
-    std::forward_iterator_tag>;
-
-template <typename AllocatorType,
-          typename ValueType =
-              typename absl::allocator_traits<AllocatorType>::value_type>
-using IsMemcpyOk =
-    absl::conjunction<std::is_same<AllocatorType, std::allocator<ValueType>>,
-                      absl::is_trivially_copy_constructible<ValueType>,
-                      absl::is_trivially_copy_assignable<ValueType>,
-                      absl::is_trivially_destructible<ValueType>>;
-
-template <typename AllocatorType, typename Pointer, typename SizeType>
-void DestroyElements(AllocatorType* alloc_ptr, Pointer destroy_first,
-                     SizeType destroy_size) {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-
-  if (destroy_first != nullptr) {
-    for (auto i = destroy_size; i != 0;) {
-      --i;
-      AllocatorTraits::destroy(*alloc_ptr, destroy_first + i);
-    }
-
-#if !defined(NDEBUG)
-    {
-      using ValueType = typename AllocatorTraits::value_type;
-
-      // Overwrite unused memory with `0xab` so we can catch uninitialized
-      // usage.
-      //
-      // Cast to `void*` to tell the compiler that we don't care that we might
-      // be scribbling on a vtable pointer.
-      void* memory_ptr = destroy_first;
-      auto memory_size = destroy_size * sizeof(ValueType);
-      std::memset(memory_ptr, 0xab, memory_size);
-    }
-#endif  // !defined(NDEBUG)
-  }
-}
-
-template <typename AllocatorType, typename Pointer, typename ValueAdapter,
-          typename SizeType>
-void ConstructElements(AllocatorType* alloc_ptr, Pointer construct_first,
-                       ValueAdapter* values_ptr, SizeType construct_size) {
-  for (SizeType i = 0; i < construct_size; ++i) {
-    ABSL_INTERNAL_TRY {
-      values_ptr->ConstructNext(alloc_ptr, construct_first + i);
-    }
-    ABSL_INTERNAL_CATCH_ANY {
-      inlined_vector_internal::DestroyElements(alloc_ptr, construct_first, i);
-      ABSL_INTERNAL_RETHROW;
-    }
-  }
-}
-
-template <typename Pointer, typename ValueAdapter, typename SizeType>
-void AssignElements(Pointer assign_first, ValueAdapter* values_ptr,
-                    SizeType assign_size) {
-  for (SizeType i = 0; i < assign_size; ++i) {
-    values_ptr->AssignNext(assign_first + i);
-  }
-}
-
-template <typename AllocatorType>
-struct StorageView {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-  using Pointer = typename AllocatorTraits::pointer;
-  using SizeType = typename AllocatorTraits::size_type;
-
-  Pointer data;
-  SizeType size;
-  SizeType capacity;
-};
-
-template <typename AllocatorType, typename Iterator>
-class IteratorValueAdapter {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-  using Pointer = typename AllocatorTraits::pointer;
-
- public:
-  explicit IteratorValueAdapter(const Iterator& it) : it_(it) {}
-
-  void ConstructNext(AllocatorType* alloc_ptr, Pointer construct_at) {
-    AllocatorTraits::construct(*alloc_ptr, construct_at, *it_);
-    ++it_;
-  }
-
-  void AssignNext(Pointer assign_at) {
-    *assign_at = *it_;
-    ++it_;
-  }
-
- private:
-  Iterator it_;
-};
-
-template <typename AllocatorType>
-class CopyValueAdapter {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-  using ValueType = typename AllocatorTraits::value_type;
-  using Pointer = typename AllocatorTraits::pointer;
-  using ConstPointer = typename AllocatorTraits::const_pointer;
-
- public:
-  explicit CopyValueAdapter(const ValueType& v) : ptr_(std::addressof(v)) {}
-
-  void ConstructNext(AllocatorType* alloc_ptr, Pointer construct_at) {
-    AllocatorTraits::construct(*alloc_ptr, construct_at, *ptr_);
-  }
-
-  void AssignNext(Pointer assign_at) { *assign_at = *ptr_; }
-
- private:
-  ConstPointer ptr_;
-};
-
-template <typename AllocatorType>
-class DefaultValueAdapter {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-  using ValueType = typename AllocatorTraits::value_type;
-  using Pointer = typename AllocatorTraits::pointer;
-
- public:
-  explicit DefaultValueAdapter() {}
-
-  void ConstructNext(AllocatorType* alloc_ptr, Pointer construct_at) {
-    AllocatorTraits::construct(*alloc_ptr, construct_at);
-  }
-
-  void AssignNext(Pointer assign_at) { *assign_at = ValueType(); }
-};
-
-template <typename AllocatorType>
-class AllocationTransaction {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-  using Pointer = typename AllocatorTraits::pointer;
-  using SizeType = typename AllocatorTraits::size_type;
-
- public:
-  explicit AllocationTransaction(AllocatorType* alloc_ptr)
-      : alloc_data_(*alloc_ptr, nullptr) {}
-
-  ~AllocationTransaction() {
-    if (DidAllocate()) {
-      AllocatorTraits::deallocate(GetAllocator(), GetData(), GetCapacity());
-    }
-  }
-
-  AllocationTransaction(const AllocationTransaction&) = delete;
-  void operator=(const AllocationTransaction&) = delete;
-
-  AllocatorType& GetAllocator() { return alloc_data_.template get<0>(); }
-  Pointer& GetData() { return alloc_data_.template get<1>(); }
-  SizeType& GetCapacity() { return capacity_; }
-
-  bool DidAllocate() { return GetData() != nullptr; }
-  Pointer Allocate(SizeType capacity) {
-    GetData() = AllocatorTraits::allocate(GetAllocator(), capacity);
-    GetCapacity() = capacity;
-    return GetData();
-  }
-
-  void Reset() {
-    GetData() = nullptr;
-    GetCapacity() = 0;
-  }
-
- private:
-  container_internal::CompressedTuple<AllocatorType, Pointer> alloc_data_;
-  SizeType capacity_ = 0;
-};
-
-template <typename AllocatorType>
-class ConstructionTransaction {
-  using AllocatorTraits = absl::allocator_traits<AllocatorType>;
-  using Pointer = typename AllocatorTraits::pointer;
-  using SizeType = typename AllocatorTraits::size_type;
-
- public:
-  explicit ConstructionTransaction(AllocatorType* alloc_ptr)
-      : alloc_data_(*alloc_ptr, nullptr) {}
-
-  ~ConstructionTransaction() {
-    if (DidConstruct()) {
-      inlined_vector_internal::DestroyElements(std::addressof(GetAllocator()),
-                                               GetData(), GetSize());
-    }
-  }
-
-  ConstructionTransaction(const ConstructionTransaction&) = delete;
-  void operator=(const ConstructionTransaction&) = delete;
-
-  AllocatorType& GetAllocator() { return alloc_data_.template get<0>(); }
-  Pointer& GetData() { return alloc_data_.template get<1>(); }
-  SizeType& GetSize() { return size_; }
-
-  bool DidConstruct() { return GetData() != nullptr; }
-  template <typename ValueAdapter>
-  void Construct(Pointer data, ValueAdapter* values_ptr, SizeType size) {
-    inlined_vector_internal::ConstructElements(std::addressof(GetAllocator()),
-                                               data, values_ptr, size);
-    GetData() = data;
-    GetSize() = size;
-  }
-  void Commit() {
-    GetData() = nullptr;
-    GetSize() = 0;
-  }
-
- private:
-  container_internal::CompressedTuple<AllocatorType, Pointer> alloc_data_;
-  SizeType size_ = 0;
-};
-
-template <typename T, size_t N, typename A>
-class Storage {
- public:
-  using AllocatorTraits = absl::allocator_traits<A>;
-  using allocator_type = typename AllocatorTraits::allocator_type;
-  using value_type = typename AllocatorTraits::value_type;
-  using pointer = typename AllocatorTraits::pointer;
-  using const_pointer = typename AllocatorTraits::const_pointer;
-  using size_type = typename AllocatorTraits::size_type;
-  using difference_type = typename AllocatorTraits::difference_type;
-
-  using reference = value_type&;
-  using const_reference = const value_type&;
-  using RValueReference = value_type&&;
-  using iterator = pointer;
-  using const_iterator = const_pointer;
-  using reverse_iterator = std::reverse_iterator<iterator>;
-  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
-  using MoveIterator = std::move_iterator<iterator>;
-  using IsMemcpyOk = inlined_vector_internal::IsMemcpyOk<allocator_type>;
-
-  using StorageView = inlined_vector_internal::StorageView<allocator_type>;
-
-  template <typename Iterator>
-  using IteratorValueAdapter =
-      inlined_vector_internal::IteratorValueAdapter<allocator_type, Iterator>;
-  using CopyValueAdapter =
-      inlined_vector_internal::CopyValueAdapter<allocator_type>;
-  using DefaultValueAdapter =
-      inlined_vector_internal::DefaultValueAdapter<allocator_type>;
-
-  using AllocationTransaction =
-      inlined_vector_internal::AllocationTransaction<allocator_type>;
-  using ConstructionTransaction =
-      inlined_vector_internal::ConstructionTransaction<allocator_type>;
-
-  static size_type NextCapacity(size_type current_capacity) {
-    return current_capacity * 2;
-  }
-
-  static size_type ComputeCapacity(size_type current_capacity,
-                                   size_type requested_capacity) {
-    return (std::max)(NextCapacity(current_capacity), requested_capacity);
-  }
-
-  // ---------------------------------------------------------------------------
-  // Storage Constructors and Destructor
-  // ---------------------------------------------------------------------------
-
-  Storage() : metadata_(allocator_type(), /* size and is_allocated */ 0) {}
-
-  explicit Storage(const allocator_type& alloc)
-      : metadata_(alloc, /* size and is_allocated */ 0) {}
-
-  ~Storage() {
-    pointer data = GetIsAllocated() ? GetAllocatedData() : GetInlinedData();
-    inlined_vector_internal::DestroyElements(GetAllocPtr(), data, GetSize());
-    DeallocateIfAllocated();
-  }
-
-  // ---------------------------------------------------------------------------
-  // Storage Member Accessors
-  // ---------------------------------------------------------------------------
-
-  size_type& GetSizeAndIsAllocated() { return metadata_.template get<1>(); }
-
-  const size_type& GetSizeAndIsAllocated() const {
-    return metadata_.template get<1>();
-  }
-
-  size_type GetSize() const { return GetSizeAndIsAllocated() >> 1; }
-
-  bool GetIsAllocated() const { return GetSizeAndIsAllocated() & 1; }
-
-  pointer GetAllocatedData() { return data_.allocated.allocated_data; }
-
-  const_pointer GetAllocatedData() const {
-    return data_.allocated.allocated_data;
-  }
-
-  pointer GetInlinedData() {
-    return reinterpret_cast<pointer>(
-        std::addressof(data_.inlined.inlined_data[0]));
-  }
-
-  const_pointer GetInlinedData() const {
-    return reinterpret_cast<const_pointer>(
-        std::addressof(data_.inlined.inlined_data[0]));
-  }
-
-  size_type GetAllocatedCapacity() const {
-    return data_.allocated.allocated_capacity;
-  }
-
-  size_type GetInlinedCapacity() const { return static_cast<size_type>(N); }
-
-  StorageView MakeStorageView() {
-    return GetIsAllocated()
-               ? StorageView{GetAllocatedData(), GetSize(),
-                             GetAllocatedCapacity()}
-               : StorageView{GetInlinedData(), GetSize(), GetInlinedCapacity()};
-  }
-
-  allocator_type* GetAllocPtr() {
-    return std::addressof(metadata_.template get<0>());
-  }
-
-  const allocator_type* GetAllocPtr() const {
-    return std::addressof(metadata_.template get<0>());
-  }
-
-  // ---------------------------------------------------------------------------
-  // Storage Member Mutators
-  // ---------------------------------------------------------------------------
-
-  template <typename ValueAdapter>
-  void Initialize(ValueAdapter values, size_type new_size);
-
-  template <typename ValueAdapter>
-  void Assign(ValueAdapter values, size_type new_size);
-
-  template <typename ValueAdapter>
-  void Resize(ValueAdapter values, size_type new_size);
-
-  template <typename ValueAdapter>
-  iterator Insert(const_iterator pos, ValueAdapter values,
-                  size_type insert_count);
-
-  template <typename... Args>
-  reference EmplaceBack(Args&&... args);
-
-  iterator Erase(const_iterator from, const_iterator to);
-
-  void Reserve(size_type requested_capacity);
-
-  void ShrinkToFit();
-
-  void Swap(Storage* other_storage_ptr);
-
-  void SetIsAllocated() {
-    GetSizeAndIsAllocated() |= static_cast<size_type>(1);
-  }
-
-  void UnsetIsAllocated() {
-    GetSizeAndIsAllocated() &= ((std::numeric_limits<size_type>::max)() - 1);
-  }
-
-  void SetSize(size_type size) {
-    GetSizeAndIsAllocated() =
-        (size << 1) | static_cast<size_type>(GetIsAllocated());
-  }
-
-  void SetAllocatedSize(size_type size) {
-    GetSizeAndIsAllocated() = (size << 1) | static_cast<size_type>(1);
-  }
-
-  void SetInlinedSize(size_type size) {
-    GetSizeAndIsAllocated() = size << static_cast<size_type>(1);
-  }
-
-  void AddSize(size_type count) {
-    GetSizeAndIsAllocated() += count << static_cast<size_type>(1);
-  }
-
-  void SubtractSize(size_type count) {
-    assert(count <= GetSize());
-
-    GetSizeAndIsAllocated() -= count << static_cast<size_type>(1);
-  }
-
-  void SetAllocatedData(pointer data, size_type capacity) {
-    data_.allocated.allocated_data = data;
-    data_.allocated.allocated_capacity = capacity;
-  }
-
-  void AcquireAllocatedData(AllocationTransaction* allocation_tx_ptr) {
-    SetAllocatedData(allocation_tx_ptr->GetData(),
-                     allocation_tx_ptr->GetCapacity());
-
-    allocation_tx_ptr->Reset();
-  }
-
-  void MemcpyFrom(const Storage& other_storage) {
-    assert(IsMemcpyOk::value || other_storage.GetIsAllocated());
-
-    GetSizeAndIsAllocated() = other_storage.GetSizeAndIsAllocated();
-    data_ = other_storage.data_;
-  }
-
-  void DeallocateIfAllocated() {
-    if (GetIsAllocated()) {
-      AllocatorTraits::deallocate(*GetAllocPtr(), GetAllocatedData(),
-                                  GetAllocatedCapacity());
-    }
-  }
-
- private:
-  using Metadata =
-      container_internal::CompressedTuple<allocator_type, size_type>;
-
-  struct Allocated {
-    pointer allocated_data;
-    size_type allocated_capacity;
-  };
-
-  struct Inlined {
-    alignas(value_type) char inlined_data[sizeof(value_type[N])];
-  };
-
-  union Data {
-    Allocated allocated;
-    Inlined inlined;
-  };
-
-  template <typename... Args>
-  ABSL_ATTRIBUTE_NOINLINE reference EmplaceBackSlow(Args&&... args);
-
-  Metadata metadata_;
-  Data data_;
-};
-
-template <typename T, size_t N, typename A>
-template <typename ValueAdapter>
-auto Storage<T, N, A>::Initialize(ValueAdapter values, size_type new_size)
-    -> void {
-  // Only callable from constructors!
-  assert(!GetIsAllocated());
-  assert(GetSize() == 0);
-
-  pointer construct_data;
-  if (new_size > GetInlinedCapacity()) {
-    // Because this is only called from the `InlinedVector` constructors, it's
-    // safe to take on the allocation with size `0`. If `ConstructElements(...)`
-    // throws, deallocation will be automatically handled by `~Storage()`.
-    size_type new_capacity = ComputeCapacity(GetInlinedCapacity(), new_size);
-    construct_data = AllocatorTraits::allocate(*GetAllocPtr(), new_capacity);
-    SetAllocatedData(construct_data, new_capacity);
-    SetIsAllocated();
-  } else {
-    construct_data = GetInlinedData();
-  }
-
-  inlined_vector_internal::ConstructElements(GetAllocPtr(), construct_data,
-                                             &values, new_size);
-
-  // Since the initial size was guaranteed to be `0` and the allocated bit is
-  // already correct for either case, *adding* `new_size` gives us the correct
-  // result faster than setting it directly.
-  AddSize(new_size);
-}
-
-template <typename T, size_t N, typename A>
-template <typename ValueAdapter>
-auto Storage<T, N, A>::Assign(ValueAdapter values, size_type new_size) -> void {
-  StorageView storage_view = MakeStorageView();
-
-  AllocationTransaction allocation_tx(GetAllocPtr());
-
-  absl::Span<value_type> assign_loop;
-  absl::Span<value_type> construct_loop;
-  absl::Span<value_type> destroy_loop;
-
-  if (new_size > storage_view.capacity) {
-    size_type new_capacity = ComputeCapacity(storage_view.capacity, new_size);
-    construct_loop = {allocation_tx.Allocate(new_capacity), new_size};
-    destroy_loop = {storage_view.data, storage_view.size};
-  } else if (new_size > storage_view.size) {
-    assign_loop = {storage_view.data, storage_view.size};
-    construct_loop = {storage_view.data + storage_view.size,
-                      new_size - storage_view.size};
-  } else {
-    assign_loop = {storage_view.data, new_size};
-    destroy_loop = {storage_view.data + new_size, storage_view.size - new_size};
-  }
-
-  inlined_vector_internal::AssignElements(assign_loop.data(), &values,
-                                          assign_loop.size());
-
-  inlined_vector_internal::ConstructElements(
-      GetAllocPtr(), construct_loop.data(), &values, construct_loop.size());
-
-  inlined_vector_internal::DestroyElements(GetAllocPtr(), destroy_loop.data(),
-                                           destroy_loop.size());
-
-  if (allocation_tx.DidAllocate()) {
-    DeallocateIfAllocated();
-    AcquireAllocatedData(&allocation_tx);
-    SetIsAllocated();
-  }
-
-  SetSize(new_size);
-}
-
-template <typename T, size_t N, typename A>
-template <typename ValueAdapter>
-auto Storage<T, N, A>::Resize(ValueAdapter values, size_type new_size) -> void {
-  StorageView storage_view = MakeStorageView();
-  auto* const base = storage_view.data;
-  const size_type size = storage_view.size;
-  auto* alloc = GetAllocPtr();
-  if (new_size <= size) {
-    // Destroy extra old elements.
-    inlined_vector_internal::DestroyElements(alloc, base + new_size,
-                                             size - new_size);
-  } else if (new_size <= storage_view.capacity) {
-    // Construct new elements in place.
-    inlined_vector_internal::ConstructElements(alloc, base + size, &values,
-                                               new_size - size);
-  } else {
-    // Steps:
-    //  a. Allocate new backing store.
-    //  b. Construct new elements in new backing store.
-    //  c. Move existing elements from old backing store to now.
-    //  d. Destroy all elements in old backing store.
-    // Use transactional wrappers for the first two steps so we can roll
-    // back if necessary due to exceptions.
-    AllocationTransaction allocation_tx(alloc);
-    size_type new_capacity = ComputeCapacity(storage_view.capacity, new_size);
-    pointer new_data = allocation_tx.Allocate(new_capacity);
-
-    ConstructionTransaction construction_tx(alloc);
-    construction_tx.Construct(new_data + size, &values, new_size - size);
-
-    IteratorValueAdapter<MoveIterator> move_values((MoveIterator(base)));
-    inlined_vector_internal::ConstructElements(alloc, new_data, &move_values,
-                                               size);
-
-    inlined_vector_internal::DestroyElements(alloc, base, size);
-    construction_tx.Commit();
-    DeallocateIfAllocated();
-    AcquireAllocatedData(&allocation_tx);
-    SetIsAllocated();
-  }
-  SetSize(new_size);
-}
-
-template <typename T, size_t N, typename A>
-template <typename ValueAdapter>
-auto Storage<T, N, A>::Insert(const_iterator pos, ValueAdapter values,
-                              size_type insert_count) -> iterator {
-  StorageView storage_view = MakeStorageView();
-
-  size_type insert_index =
-      std::distance(const_iterator(storage_view.data), pos);
-  size_type insert_end_index = insert_index + insert_count;
-  size_type new_size = storage_view.size + insert_count;
-
-  if (new_size > storage_view.capacity) {
-    AllocationTransaction allocation_tx(GetAllocPtr());
-    ConstructionTransaction construction_tx(GetAllocPtr());
-    ConstructionTransaction move_construciton_tx(GetAllocPtr());
-
-    IteratorValueAdapter<MoveIterator> move_values(
-        MoveIterator(storage_view.data));
-
-    size_type new_capacity = ComputeCapacity(storage_view.capacity, new_size);
-    pointer new_data = allocation_tx.Allocate(new_capacity);
-
-    construction_tx.Construct(new_data + insert_index, &values, insert_count);
-
-    move_construciton_tx.Construct(new_data, &move_values, insert_index);
-
-    inlined_vector_internal::ConstructElements(
-        GetAllocPtr(), new_data + insert_end_index, &move_values,
-        storage_view.size - insert_index);
-
-    inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
-                                             storage_view.size);
-
-    construction_tx.Commit();
-    move_construciton_tx.Commit();
-    DeallocateIfAllocated();
-    AcquireAllocatedData(&allocation_tx);
-
-    SetAllocatedSize(new_size);
-    return iterator(new_data + insert_index);
-  } else {
-    size_type move_construction_destination_index =
-        (std::max)(insert_end_index, storage_view.size);
-
-    ConstructionTransaction move_construction_tx(GetAllocPtr());
-
-    IteratorValueAdapter<MoveIterator> move_construction_values(
-        MoveIterator(storage_view.data +
-                     (move_construction_destination_index - insert_count)));
-    absl::Span<value_type> move_construction = {
-        storage_view.data + move_construction_destination_index,
-        new_size - move_construction_destination_index};
-
-    pointer move_assignment_values = storage_view.data + insert_index;
-    absl::Span<value_type> move_assignment = {
-        storage_view.data + insert_end_index,
-        move_construction_destination_index - insert_end_index};
-
-    absl::Span<value_type> insert_assignment = {move_assignment_values,
-                                                move_construction.size()};
-
-    absl::Span<value_type> insert_construction = {
-        insert_assignment.data() + insert_assignment.size(),
-        insert_count - insert_assignment.size()};
-
-    move_construction_tx.Construct(move_construction.data(),
-                                   &move_construction_values,
-                                   move_construction.size());
-
-    for (pointer destination = move_assignment.data() + move_assignment.size(),
-                 last_destination = move_assignment.data(),
-                 source = move_assignment_values + move_assignment.size();
-         ;) {
-      --destination;
-      --source;
-      if (destination < last_destination) break;
-      *destination = std::move(*source);
-    }
-
-    inlined_vector_internal::AssignElements(insert_assignment.data(), &values,
-                                            insert_assignment.size());
-
-    inlined_vector_internal::ConstructElements(
-        GetAllocPtr(), insert_construction.data(), &values,
-        insert_construction.size());
-
-    move_construction_tx.Commit();
-
-    AddSize(insert_count);
-    return iterator(storage_view.data + insert_index);
-  }
-}
-
-template <typename T, size_t N, typename A>
-template <typename... Args>
-auto Storage<T, N, A>::EmplaceBack(Args&&... args) -> reference {
-  StorageView storage_view = MakeStorageView();
-  const auto n = storage_view.size;
-  if (ABSL_PREDICT_TRUE(n != storage_view.capacity)) {
-    // Fast path; new element fits.
-    pointer last_ptr = storage_view.data + n;
-    AllocatorTraits::construct(*GetAllocPtr(), last_ptr,
-                               std::forward<Args>(args)...);
-    AddSize(1);
-    return *last_ptr;
-  }
-  // TODO(b/173712035): Annotate with musttail attribute to prevent regression.
-  return EmplaceBackSlow(std::forward<Args>(args)...);
-}
-
-template <typename T, size_t N, typename A>
-template <typename... Args>
-auto Storage<T, N, A>::EmplaceBackSlow(Args&&... args) -> reference {
-  StorageView storage_view = MakeStorageView();
-  AllocationTransaction allocation_tx(GetAllocPtr());
-  IteratorValueAdapter<MoveIterator> move_values(
-      MoveIterator(storage_view.data));
-  size_type new_capacity = NextCapacity(storage_view.capacity);
-  pointer construct_data = allocation_tx.Allocate(new_capacity);
-  pointer last_ptr = construct_data + storage_view.size;
-
-  // Construct new element.
-  AllocatorTraits::construct(*GetAllocPtr(), last_ptr,
-                             std::forward<Args>(args)...);
-  // Move elements from old backing store to new backing store.
-  ABSL_INTERNAL_TRY {
-    inlined_vector_internal::ConstructElements(
-        GetAllocPtr(), allocation_tx.GetData(), &move_values,
-        storage_view.size);
-  }
-  ABSL_INTERNAL_CATCH_ANY {
-    AllocatorTraits::destroy(*GetAllocPtr(), last_ptr);
-    ABSL_INTERNAL_RETHROW;
-  }
-  // Destroy elements in old backing store.
-  inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
-                                           storage_view.size);
-
-  DeallocateIfAllocated();
-  AcquireAllocatedData(&allocation_tx);
-  SetIsAllocated();
-  AddSize(1);
-  return *last_ptr;
-}
-
-template <typename T, size_t N, typename A>
-auto Storage<T, N, A>::Erase(const_iterator from, const_iterator to)
-    -> iterator {
-  StorageView storage_view = MakeStorageView();
-
-  size_type erase_size = std::distance(from, to);
-  size_type erase_index =
-      std::distance(const_iterator(storage_view.data), from);
-  size_type erase_end_index = erase_index + erase_size;
-
-  IteratorValueAdapter<MoveIterator> move_values(
-      MoveIterator(storage_view.data + erase_end_index));
-
-  inlined_vector_internal::AssignElements(storage_view.data + erase_index,
-                                          &move_values,
-                                          storage_view.size - erase_end_index);
-
-  inlined_vector_internal::DestroyElements(
-      GetAllocPtr(), storage_view.data + (storage_view.size - erase_size),
-      erase_size);
-
-  SubtractSize(erase_size);
-  return iterator(storage_view.data + erase_index);
-}
-
-template <typename T, size_t N, typename A>
-auto Storage<T, N, A>::Reserve(size_type requested_capacity) -> void {
-  StorageView storage_view = MakeStorageView();
-
-  if (ABSL_PREDICT_FALSE(requested_capacity <= storage_view.capacity)) return;
-
-  AllocationTransaction allocation_tx(GetAllocPtr());
-
-  IteratorValueAdapter<MoveIterator> move_values(
-      MoveIterator(storage_view.data));
-
-  size_type new_capacity =
-      ComputeCapacity(storage_view.capacity, requested_capacity);
-  pointer new_data = allocation_tx.Allocate(new_capacity);
-
-  inlined_vector_internal::ConstructElements(GetAllocPtr(), new_data,
-                                             &move_values, storage_view.size);
-
-  inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
-                                           storage_view.size);
-
-  DeallocateIfAllocated();
-  AcquireAllocatedData(&allocation_tx);
-  SetIsAllocated();
-}
-
-template <typename T, size_t N, typename A>
-auto Storage<T, N, A>::ShrinkToFit() -> void {
-  // May only be called on allocated instances!
-  assert(GetIsAllocated());
-
-  StorageView storage_view{GetAllocatedData(), GetSize(),
-                           GetAllocatedCapacity()};
-
-  if (ABSL_PREDICT_FALSE(storage_view.size == storage_view.capacity)) return;
-
-  AllocationTransaction allocation_tx(GetAllocPtr());
-
-  IteratorValueAdapter<MoveIterator> move_values(
-      MoveIterator(storage_view.data));
-
-  pointer construct_data;
-  if (storage_view.size > GetInlinedCapacity()) {
-    size_type new_capacity = storage_view.size;
-    construct_data = allocation_tx.Allocate(new_capacity);
-  } else {
-    construct_data = GetInlinedData();
-  }
-
-  ABSL_INTERNAL_TRY {
-    inlined_vector_internal::ConstructElements(GetAllocPtr(), construct_data,
-                                               &move_values, storage_view.size);
-  }
-  ABSL_INTERNAL_CATCH_ANY {
-    SetAllocatedData(storage_view.data, storage_view.capacity);
-    ABSL_INTERNAL_RETHROW;
-  }
-
-  inlined_vector_internal::DestroyElements(GetAllocPtr(), storage_view.data,
-                                           storage_view.size);
-
-  AllocatorTraits::deallocate(*GetAllocPtr(), storage_view.data,
-                              storage_view.capacity);
-
-  if (allocation_tx.DidAllocate()) {
-    AcquireAllocatedData(&allocation_tx);
-  } else {
-    UnsetIsAllocated();
-  }
-}
-
-template <typename T, size_t N, typename A>
-auto Storage<T, N, A>::Swap(Storage* other_storage_ptr) -> void {
-  using std::swap;
-  assert(this != other_storage_ptr);
-
-  if (GetIsAllocated() && other_storage_ptr->GetIsAllocated()) {
-    swap(data_.allocated, other_storage_ptr->data_.allocated);
-  } else if (!GetIsAllocated() && !other_storage_ptr->GetIsAllocated()) {
-    Storage* small_ptr = this;
-    Storage* large_ptr = other_storage_ptr;
-    if (small_ptr->GetSize() > large_ptr->GetSize()) swap(small_ptr, large_ptr);
-
-    for (size_type i = 0; i < small_ptr->GetSize(); ++i) {
-      swap(small_ptr->GetInlinedData()[i], large_ptr->GetInlinedData()[i]);
-    }
-
-    IteratorValueAdapter<MoveIterator> move_values(
-        MoveIterator(large_ptr->GetInlinedData() + small_ptr->GetSize()));
-
-    inlined_vector_internal::ConstructElements(
-        large_ptr->GetAllocPtr(),
-        small_ptr->GetInlinedData() + small_ptr->GetSize(), &move_values,
-        large_ptr->GetSize() - small_ptr->GetSize());
-
-    inlined_vector_internal::DestroyElements(
-        large_ptr->GetAllocPtr(),
-        large_ptr->GetInlinedData() + small_ptr->GetSize(),
-        large_ptr->GetSize() - small_ptr->GetSize());
-  } else {
-    Storage* allocated_ptr = this;
-    Storage* inlined_ptr = other_storage_ptr;
-    if (!allocated_ptr->GetIsAllocated()) swap(allocated_ptr, inlined_ptr);
-
-    StorageView allocated_storage_view{allocated_ptr->GetAllocatedData(),
-                                       allocated_ptr->GetSize(),
-                                       allocated_ptr->GetAllocatedCapacity()};
-
-    IteratorValueAdapter<MoveIterator> move_values(
-        MoveIterator(inlined_ptr->GetInlinedData()));
-
-    ABSL_INTERNAL_TRY {
-      inlined_vector_internal::ConstructElements(
-          inlined_ptr->GetAllocPtr(), allocated_ptr->GetInlinedData(),
-          &move_values, inlined_ptr->GetSize());
-    }
-    ABSL_INTERNAL_CATCH_ANY {
-      allocated_ptr->SetAllocatedData(allocated_storage_view.data,
-                                      allocated_storage_view.capacity);
-      ABSL_INTERNAL_RETHROW;
-    }
-
-    inlined_vector_internal::DestroyElements(inlined_ptr->GetAllocPtr(),
-                                             inlined_ptr->GetInlinedData(),
-                                             inlined_ptr->GetSize());
-
-    inlined_ptr->SetAllocatedData(allocated_storage_view.data,
-                                  allocated_storage_view.capacity);
-  }
-
-  swap(GetSizeAndIsAllocated(), other_storage_ptr->GetSizeAndIsAllocated());
-  swap(*GetAllocPtr(), *other_storage_ptr->GetAllocPtr());
-}
-
-// End ignore "maybe-uninitialized"
-#if !defined(__clang__) && defined(__GNUC__)
-#pragma GCC diagnostic pop
-#endif
-
-}  // namespace inlined_vector_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_
diff --git a/third_party/abseil/absl/container/internal/layout.h b/third_party/abseil/absl/container/internal/layout.h
deleted file mode 100644
index 2336783..0000000
--- a/third_party/abseil/absl/container/internal/layout.h
+++ /dev/null
@@ -1,743 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-//                           MOTIVATION AND TUTORIAL
-//
-// If you want to put in a single heap allocation N doubles followed by M ints,
-// it's easy if N and M are known at compile time.
-//
-//   struct S {
-//     double a[N];
-//     int b[M];
-//   };
-//
-//   S* p = new S;
-//
-// But what if N and M are known only in run time? Class template Layout to the
-// rescue! It's a portable generalization of the technique known as struct hack.
-//
-//   // This object will tell us everything we need to know about the memory
-//   // layout of double[N] followed by int[M]. It's structurally identical to
-//   // size_t[2] that stores N and M. It's very cheap to create.
-//   const Layout<double, int> layout(N, M);
-//
-//   // Allocate enough memory for both arrays. `AllocSize()` tells us how much
-//   // memory is needed. We are free to use any allocation function we want as
-//   // long as it returns aligned memory.
-//   std::unique_ptr<unsigned char[]> p(new unsigned char[layout.AllocSize()]);
-//
-//   // Obtain the pointer to the array of doubles.
-//   // Equivalent to `reinterpret_cast<double*>(p.get())`.
-//   //
-//   // We could have written layout.Pointer<0>(p) instead. If all the types are
-//   // unique you can use either form, but if some types are repeated you must
-//   // use the index form.
-//   double* a = layout.Pointer<double>(p.get());
-//
-//   // Obtain the pointer to the array of ints.
-//   // Equivalent to `reinterpret_cast<int*>(p.get() + N * 8)`.
-//   int* b = layout.Pointer<int>(p);
-//
-// If we are unable to specify sizes of all fields, we can pass as many sizes as
-// we can to `Partial()`. In return, it'll allow us to access the fields whose
-// locations and sizes can be computed from the provided information.
-// `Partial()` comes in handy when the array sizes are embedded into the
-// allocation.
-//
-//   // size_t[1] containing N, size_t[1] containing M, double[N], int[M].
-//   using L = Layout<size_t, size_t, double, int>;
-//
-//   unsigned char* Allocate(size_t n, size_t m) {
-//     const L layout(1, 1, n, m);
-//     unsigned char* p = new unsigned char[layout.AllocSize()];
-//     *layout.Pointer<0>(p) = n;
-//     *layout.Pointer<1>(p) = m;
-//     return p;
-//   }
-//
-//   void Use(unsigned char* p) {
-//     // First, extract N and M.
-//     // Specify that the first array has only one element. Using `prefix` we
-//     // can access the first two arrays but not more.
-//     constexpr auto prefix = L::Partial(1);
-//     size_t n = *prefix.Pointer<0>(p);
-//     size_t m = *prefix.Pointer<1>(p);
-//
-//     // Now we can get pointers to the payload.
-//     const L layout(1, 1, n, m);
-//     double* a = layout.Pointer<double>(p);
-//     int* b = layout.Pointer<int>(p);
-//   }
-//
-// The layout we used above combines fixed-size with dynamically-sized fields.
-// This is quite common. Layout is optimized for this use case and generates
-// optimal code. All computations that can be performed at compile time are
-// indeed performed at compile time.
-//
-// Efficiency tip: The order of fields matters. In `Layout<T1, ..., TN>` try to
-// ensure that `alignof(T1) >= ... >= alignof(TN)`. This way you'll have no
-// padding in between arrays.
-//
-// You can manually override the alignment of an array by wrapping the type in
-// `Aligned<T, N>`. `Layout<..., Aligned<T, N>, ...>` has exactly the same API
-// and behavior as `Layout<..., T, ...>` except that the first element of the
-// array of `T` is aligned to `N` (the rest of the elements follow without
-// padding). `N` cannot be less than `alignof(T)`.
-//
-// `AllocSize()` and `Pointer()` are the most basic methods for dealing with
-// memory layouts. Check out the reference or code below to discover more.
-//
-//                            EXAMPLE
-//
-//   // Immutable move-only string with sizeof equal to sizeof(void*). The
-//   // string size and the characters are kept in the same heap allocation.
-//   class CompactString {
-//    public:
-//     CompactString(const char* s = "") {
-//       const size_t size = strlen(s);
-//       // size_t[1] followed by char[size + 1].
-//       const L layout(1, size + 1);
-//       p_.reset(new unsigned char[layout.AllocSize()]);
-//       // If running under ASAN, mark the padding bytes, if any, to catch
-//       // memory errors.
-//       layout.PoisonPadding(p_.get());
-//       // Store the size in the allocation.
-//       *layout.Pointer<size_t>(p_.get()) = size;
-//       // Store the characters in the allocation.
-//       memcpy(layout.Pointer<char>(p_.get()), s, size + 1);
-//     }
-//
-//     size_t size() const {
-//       // Equivalent to reinterpret_cast<size_t&>(*p).
-//       return *L::Partial().Pointer<size_t>(p_.get());
-//     }
-//
-//     const char* c_str() const {
-//       // Equivalent to reinterpret_cast<char*>(p.get() + sizeof(size_t)).
-//       // The argument in Partial(1) specifies that we have size_t[1] in front
-//       // of the characters.
-//       return L::Partial(1).Pointer<char>(p_.get());
-//     }
-//
-//    private:
-//     // Our heap allocation contains a size_t followed by an array of chars.
-//     using L = Layout<size_t, char>;
-//     std::unique_ptr<unsigned char[]> p_;
-//   };
-//
-//   int main() {
-//     CompactString s = "hello";
-//     assert(s.size() == 5);
-//     assert(strcmp(s.c_str(), "hello") == 0);
-//   }
-//
-//                               DOCUMENTATION
-//
-// The interface exported by this file consists of:
-// - class `Layout<>` and its public members.
-// - The public members of class `internal_layout::LayoutImpl<>`. That class
-//   isn't intended to be used directly, and its name and template parameter
-//   list are internal implementation details, but the class itself provides
-//   most of the functionality in this file. See comments on its members for
-//   detailed documentation.
-//
-// `Layout<T1,... Tn>::Partial(count1,..., countm)` (where `m` <= `n`) returns a
-// `LayoutImpl<>` object. `Layout<T1,..., Tn> layout(count1,..., countn)`
-// creates a `Layout` object, which exposes the same functionality by inheriting
-// from `LayoutImpl<>`.
-
-#ifndef ABSL_CONTAINER_INTERNAL_LAYOUT_H_
-#define ABSL_CONTAINER_INTERNAL_LAYOUT_H_
-
-#include <assert.h>
-#include <stddef.h>
-#include <stdint.h>
-
-#include <ostream>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <typeinfo>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/str_cat.h"
-#include "absl/types/span.h"
-#include "absl/utility/utility.h"
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-#include <sanitizer/asan_interface.h>
-#endif
-
-#if defined(__GXX_RTTI)
-#define ABSL_INTERNAL_HAS_CXA_DEMANGLE
-#endif
-
-#ifdef ABSL_INTERNAL_HAS_CXA_DEMANGLE
-#include <cxxabi.h>
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// A type wrapper that instructs `Layout` to use the specific alignment for the
-// array. `Layout<..., Aligned<T, N>, ...>` has exactly the same API
-// and behavior as `Layout<..., T, ...>` except that the first element of the
-// array of `T` is aligned to `N` (the rest of the elements follow without
-// padding).
-//
-// Requires: `N >= alignof(T)` and `N` is a power of 2.
-template <class T, size_t N>
-struct Aligned;
-
-namespace internal_layout {
-
-template <class T>
-struct NotAligned {};
-
-template <class T, size_t N>
-struct NotAligned<const Aligned<T, N>> {
-  static_assert(sizeof(T) == 0, "Aligned<T, N> cannot be const-qualified");
-};
-
-template <size_t>
-using IntToSize = size_t;
-
-template <class>
-using TypeToSize = size_t;
-
-template <class T>
-struct Type : NotAligned<T> {
-  using type = T;
-};
-
-template <class T, size_t N>
-struct Type<Aligned<T, N>> {
-  using type = T;
-};
-
-template <class T>
-struct SizeOf : NotAligned<T>, std::integral_constant<size_t, sizeof(T)> {};
-
-template <class T, size_t N>
-struct SizeOf<Aligned<T, N>> : std::integral_constant<size_t, sizeof(T)> {};
-
-// Note: workaround for https://gcc.gnu.org/PR88115
-template <class T>
-struct AlignOf : NotAligned<T> {
-  static constexpr size_t value = alignof(T);
-};
-
-template <class T, size_t N>
-struct AlignOf<Aligned<T, N>> {
-  static_assert(N % alignof(T) == 0,
-                "Custom alignment can't be lower than the type's alignment");
-  static constexpr size_t value = N;
-};
-
-// Does `Ts...` contain `T`?
-template <class T, class... Ts>
-using Contains = absl::disjunction<std::is_same<T, Ts>...>;
-
-template <class From, class To>
-using CopyConst =
-    typename std::conditional<std::is_const<From>::value, const To, To>::type;
-
-// Note: We're not qualifying this with absl:: because it doesn't compile under
-// MSVC.
-template <class T>
-using SliceType = Span<T>;
-
-// This namespace contains no types. It prevents functions defined in it from
-// being found by ADL.
-namespace adl_barrier {
-
-template <class Needle, class... Ts>
-constexpr size_t Find(Needle, Needle, Ts...) {
-  static_assert(!Contains<Needle, Ts...>(), "Duplicate element type");
-  return 0;
-}
-
-template <class Needle, class T, class... Ts>
-constexpr size_t Find(Needle, T, Ts...) {
-  return adl_barrier::Find(Needle(), Ts()...) + 1;
-}
-
-constexpr bool IsPow2(size_t n) { return !(n & (n - 1)); }
-
-// Returns `q * m` for the smallest `q` such that `q * m >= n`.
-// Requires: `m` is a power of two. It's enforced by IsLegalElementType below.
-constexpr size_t Align(size_t n, size_t m) { return (n + m - 1) & ~(m - 1); }
-
-constexpr size_t Min(size_t a, size_t b) { return b < a ? b : a; }
-
-constexpr size_t Max(size_t a) { return a; }
-
-template <class... Ts>
-constexpr size_t Max(size_t a, size_t b, Ts... rest) {
-  return adl_barrier::Max(b < a ? a : b, rest...);
-}
-
-template <class T>
-std::string TypeName() {
-  std::string out;
-  int status = 0;
-  char* demangled = nullptr;
-#ifdef ABSL_INTERNAL_HAS_CXA_DEMANGLE
-  demangled = abi::__cxa_demangle(typeid(T).name(), nullptr, nullptr, &status);
-#endif
-  if (status == 0 && demangled != nullptr) {  // Demangling succeeded.
-    absl::StrAppend(&out, "<", demangled, ">");
-    free(demangled);
-  } else {
-#if defined(__GXX_RTTI) || defined(_CPPRTTI)
-    absl::StrAppend(&out, "<", typeid(T).name(), ">");
-#endif
-  }
-  return out;
-}
-
-}  // namespace adl_barrier
-
-template <bool C>
-using EnableIf = typename std::enable_if<C, int>::type;
-
-// Can `T` be a template argument of `Layout`?
-template <class T>
-using IsLegalElementType = std::integral_constant<
-    bool, !std::is_reference<T>::value && !std::is_volatile<T>::value &&
-              !std::is_reference<typename Type<T>::type>::value &&
-              !std::is_volatile<typename Type<T>::type>::value &&
-              adl_barrier::IsPow2(AlignOf<T>::value)>;
-
-template <class Elements, class SizeSeq, class OffsetSeq>
-class LayoutImpl;
-
-// Public base class of `Layout` and the result type of `Layout::Partial()`.
-//
-// `Elements...` contains all template arguments of `Layout` that created this
-// instance.
-//
-// `SizeSeq...` is `[0, NumSizes)` where `NumSizes` is the number of arguments
-// passed to `Layout::Partial()` or `Layout::Layout()`.
-//
-// `OffsetSeq...` is `[0, NumOffsets)` where `NumOffsets` is
-// `Min(sizeof...(Elements), NumSizes + 1)` (the number of arrays for which we
-// can compute offsets).
-template <class... Elements, size_t... SizeSeq, size_t... OffsetSeq>
-class LayoutImpl<std::tuple<Elements...>, absl::index_sequence<SizeSeq...>,
-                 absl::index_sequence<OffsetSeq...>> {
- private:
-  static_assert(sizeof...(Elements) > 0, "At least one field is required");
-  static_assert(absl::conjunction<IsLegalElementType<Elements>...>::value,
-                "Invalid element type (see IsLegalElementType)");
-
-  enum {
-    NumTypes = sizeof...(Elements),
-    NumSizes = sizeof...(SizeSeq),
-    NumOffsets = sizeof...(OffsetSeq),
-  };
-
-  // These are guaranteed by `Layout`.
-  static_assert(NumOffsets == adl_barrier::Min(NumTypes, NumSizes + 1),
-                "Internal error");
-  static_assert(NumTypes > 0, "Internal error");
-
-  // Returns the index of `T` in `Elements...`. Results in a compilation error
-  // if `Elements...` doesn't contain exactly one instance of `T`.
-  template <class T>
-  static constexpr size_t ElementIndex() {
-    static_assert(Contains<Type<T>, Type<typename Type<Elements>::type>...>(),
-                  "Type not found");
-    return adl_barrier::Find(Type<T>(),
-                             Type<typename Type<Elements>::type>()...);
-  }
-
-  template <size_t N>
-  using ElementAlignment =
-      AlignOf<typename std::tuple_element<N, std::tuple<Elements...>>::type>;
-
- public:
-  // Element types of all arrays packed in a tuple.
-  using ElementTypes = std::tuple<typename Type<Elements>::type...>;
-
-  // Element type of the Nth array.
-  template <size_t N>
-  using ElementType = typename std::tuple_element<N, ElementTypes>::type;
-
-  constexpr explicit LayoutImpl(IntToSize<SizeSeq>... sizes)
-      : size_{sizes...} {}
-
-  // Alignment of the layout, equal to the strictest alignment of all elements.
-  // All pointers passed to the methods of layout must be aligned to this value.
-  static constexpr size_t Alignment() {
-    return adl_barrier::Max(AlignOf<Elements>::value...);
-  }
-
-  // Offset in bytes of the Nth array.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   assert(x.Offset<0>() == 0);   // The ints starts from 0.
-  //   assert(x.Offset<1>() == 16);  // The doubles starts from 16.
-  //
-  // Requires: `N <= NumSizes && N < sizeof...(Ts)`.
-  template <size_t N, EnableIf<N == 0> = 0>
-  constexpr size_t Offset() const {
-    return 0;
-  }
-
-  template <size_t N, EnableIf<N != 0> = 0>
-  constexpr size_t Offset() const {
-    static_assert(N < NumOffsets, "Index out of bounds");
-    return adl_barrier::Align(
-        Offset<N - 1>() + SizeOf<ElementType<N - 1>>() * size_[N - 1],
-        ElementAlignment<N>::value);
-  }
-
-  // Offset in bytes of the array with the specified element type. There must
-  // be exactly one such array and its zero-based index must be at most
-  // `NumSizes`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   assert(x.Offset<int>() == 0);      // The ints starts from 0.
-  //   assert(x.Offset<double>() == 16);  // The doubles starts from 16.
-  template <class T>
-  constexpr size_t Offset() const {
-    return Offset<ElementIndex<T>()>();
-  }
-
-  // Offsets in bytes of all arrays for which the offsets are known.
-  constexpr std::array<size_t, NumOffsets> Offsets() const {
-    return {{Offset<OffsetSeq>()...}};
-  }
-
-  // The number of elements in the Nth array. This is the Nth argument of
-  // `Layout::Partial()` or `Layout::Layout()` (zero-based).
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   assert(x.Size<0>() == 3);
-  //   assert(x.Size<1>() == 4);
-  //
-  // Requires: `N < NumSizes`.
-  template <size_t N>
-  constexpr size_t Size() const {
-    static_assert(N < NumSizes, "Index out of bounds");
-    return size_[N];
-  }
-
-  // The number of elements in the array with the specified element type.
-  // There must be exactly one such array and its zero-based index must be
-  // at most `NumSizes`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   assert(x.Size<int>() == 3);
-  //   assert(x.Size<double>() == 4);
-  template <class T>
-  constexpr size_t Size() const {
-    return Size<ElementIndex<T>()>();
-  }
-
-  // The number of elements of all arrays for which they are known.
-  constexpr std::array<size_t, NumSizes> Sizes() const {
-    return {{Size<SizeSeq>()...}};
-  }
-
-  // Pointer to the beginning of the Nth array.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];
-  //   int* ints = x.Pointer<0>(p);
-  //   double* doubles = x.Pointer<1>(p);
-  //
-  // Requires: `N <= NumSizes && N < sizeof...(Ts)`.
-  // Requires: `p` is aligned to `Alignment()`.
-  template <size_t N, class Char>
-  CopyConst<Char, ElementType<N>>* Pointer(Char* p) const {
-    using C = typename std::remove_const<Char>::type;
-    static_assert(
-        std::is_same<C, char>() || std::is_same<C, unsigned char>() ||
-            std::is_same<C, signed char>(),
-        "The argument must be a pointer to [const] [signed|unsigned] char");
-    constexpr size_t alignment = Alignment();
-    (void)alignment;
-    assert(reinterpret_cast<uintptr_t>(p) % alignment == 0);
-    return reinterpret_cast<CopyConst<Char, ElementType<N>>*>(p + Offset<N>());
-  }
-
-  // Pointer to the beginning of the array with the specified element type.
-  // There must be exactly one such array and its zero-based index must be at
-  // most `NumSizes`.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];
-  //   int* ints = x.Pointer<int>(p);
-  //   double* doubles = x.Pointer<double>(p);
-  //
-  // Requires: `p` is aligned to `Alignment()`.
-  template <class T, class Char>
-  CopyConst<Char, T>* Pointer(Char* p) const {
-    return Pointer<ElementIndex<T>()>(p);
-  }
-
-  // Pointers to all arrays for which pointers are known.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];
-  //
-  //   int* ints;
-  //   double* doubles;
-  //   std::tie(ints, doubles) = x.Pointers(p);
-  //
-  // Requires: `p` is aligned to `Alignment()`.
-  //
-  // Note: We're not using ElementType alias here because it does not compile
-  // under MSVC.
-  template <class Char>
-  std::tuple<CopyConst<
-      Char, typename std::tuple_element<OffsetSeq, ElementTypes>::type>*...>
-  Pointers(Char* p) const {
-    return std::tuple<CopyConst<Char, ElementType<OffsetSeq>>*...>(
-        Pointer<OffsetSeq>(p)...);
-  }
-
-  // The Nth array.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];
-  //   Span<int> ints = x.Slice<0>(p);
-  //   Span<double> doubles = x.Slice<1>(p);
-  //
-  // Requires: `N < NumSizes`.
-  // Requires: `p` is aligned to `Alignment()`.
-  template <size_t N, class Char>
-  SliceType<CopyConst<Char, ElementType<N>>> Slice(Char* p) const {
-    return SliceType<CopyConst<Char, ElementType<N>>>(Pointer<N>(p), Size<N>());
-  }
-
-  // The array with the specified element type. There must be exactly one
-  // such array and its zero-based index must be less than `NumSizes`.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];
-  //   Span<int> ints = x.Slice<int>(p);
-  //   Span<double> doubles = x.Slice<double>(p);
-  //
-  // Requires: `p` is aligned to `Alignment()`.
-  template <class T, class Char>
-  SliceType<CopyConst<Char, T>> Slice(Char* p) const {
-    return Slice<ElementIndex<T>()>(p);
-  }
-
-  // All arrays with known sizes.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];
-  //
-  //   Span<int> ints;
-  //   Span<double> doubles;
-  //   std::tie(ints, doubles) = x.Slices(p);
-  //
-  // Requires: `p` is aligned to `Alignment()`.
-  //
-  // Note: We're not using ElementType alias here because it does not compile
-  // under MSVC.
-  template <class Char>
-  std::tuple<SliceType<CopyConst<
-      Char, typename std::tuple_element<SizeSeq, ElementTypes>::type>>...>
-  Slices(Char* p) const {
-    // Workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63875 (fixed
-    // in 6.1).
-    (void)p;
-    return std::tuple<SliceType<CopyConst<Char, ElementType<SizeSeq>>>...>(
-        Slice<SizeSeq>(p)...);
-  }
-
-  // The size of the allocation that fits all arrays.
-  //
-  //   // int[3], 4 bytes of padding, double[4].
-  //   Layout<int, double> x(3, 4);
-  //   unsigned char* p = new unsigned char[x.AllocSize()];  // 48 bytes
-  //
-  // Requires: `NumSizes == sizeof...(Ts)`.
-  constexpr size_t AllocSize() const {
-    static_assert(NumTypes == NumSizes, "You must specify sizes of all fields");
-    return Offset<NumTypes - 1>() +
-           SizeOf<ElementType<NumTypes - 1>>() * size_[NumTypes - 1];
-  }
-
-  // If built with --config=asan, poisons padding bytes (if any) in the
-  // allocation. The pointer must point to a memory block at least
-  // `AllocSize()` bytes in length.
-  //
-  // `Char` must be `[const] [signed|unsigned] char`.
-  //
-  // Requires: `p` is aligned to `Alignment()`.
-  template <class Char, size_t N = NumOffsets - 1, EnableIf<N == 0> = 0>
-  void PoisonPadding(const Char* p) const {
-    Pointer<0>(p);  // verify the requirements on `Char` and `p`
-  }
-
-  template <class Char, size_t N = NumOffsets - 1, EnableIf<N != 0> = 0>
-  void PoisonPadding(const Char* p) const {
-    static_assert(N < NumOffsets, "Index out of bounds");
-    (void)p;
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-    PoisonPadding<Char, N - 1>(p);
-    // The `if` is an optimization. It doesn't affect the observable behaviour.
-    if (ElementAlignment<N - 1>::value % ElementAlignment<N>::value) {
-      size_t start =
-          Offset<N - 1>() + SizeOf<ElementType<N - 1>>() * size_[N - 1];
-      ASAN_POISON_MEMORY_REGION(p + start, Offset<N>() - start);
-    }
-#endif
-  }
-
-  // Human-readable description of the memory layout. Useful for debugging.
-  // Slow.
-  //
-  //   // char[5], 3 bytes of padding, int[3], 4 bytes of padding, followed
-  //   // by an unknown number of doubles.
-  //   auto x = Layout<char, int, double>::Partial(5, 3);
-  //   assert(x.DebugString() ==
-  //          "@0<char>(1)[5]; @8<int>(4)[3]; @24<double>(8)");
-  //
-  // Each field is in the following format: @offset<type>(sizeof)[size] (<type>
-  // may be missing depending on the target platform). For example,
-  // @8<int>(4)[3] means that at offset 8 we have an array of ints, where each
-  // int is 4 bytes, and we have 3 of those ints. The size of the last field may
-  // be missing (as in the example above). Only fields with known offsets are
-  // described. Type names may differ across platforms: one compiler might
-  // produce "unsigned*" where another produces "unsigned int *".
-  std::string DebugString() const {
-    const auto offsets = Offsets();
-    const size_t sizes[] = {SizeOf<ElementType<OffsetSeq>>()...};
-    const std::string types[] = {
-        adl_barrier::TypeName<ElementType<OffsetSeq>>()...};
-    std::string res = absl::StrCat("@0", types[0], "(", sizes[0], ")");
-    for (size_t i = 0; i != NumOffsets - 1; ++i) {
-      absl::StrAppend(&res, "[", size_[i], "]; @", offsets[i + 1], types[i + 1],
-                      "(", sizes[i + 1], ")");
-    }
-    // NumSizes is a constant that may be zero. Some compilers cannot see that
-    // inside the if statement "size_[NumSizes - 1]" must be valid.
-    int last = static_cast<int>(NumSizes) - 1;
-    if (NumTypes == NumSizes && last >= 0) {
-      absl::StrAppend(&res, "[", size_[last], "]");
-    }
-    return res;
-  }
-
- private:
-  // Arguments of `Layout::Partial()` or `Layout::Layout()`.
-  size_t size_[NumSizes > 0 ? NumSizes : 1];
-};
-
-template <size_t NumSizes, class... Ts>
-using LayoutType = LayoutImpl<
-    std::tuple<Ts...>, absl::make_index_sequence<NumSizes>,
-    absl::make_index_sequence<adl_barrier::Min(sizeof...(Ts), NumSizes + 1)>>;
-
-}  // namespace internal_layout
-
-// Descriptor of arrays of various types and sizes laid out in memory one after
-// another. See the top of the file for documentation.
-//
-// Check out the public API of internal_layout::LayoutImpl above. The type is
-// internal to the library but its methods are public, and they are inherited
-// by `Layout`.
-template <class... Ts>
-class Layout : public internal_layout::LayoutType<sizeof...(Ts), Ts...> {
- public:
-  static_assert(sizeof...(Ts) > 0, "At least one field is required");
-  static_assert(
-      absl::conjunction<internal_layout::IsLegalElementType<Ts>...>::value,
-      "Invalid element type (see IsLegalElementType)");
-
-  // The result type of `Partial()` with `NumSizes` arguments.
-  template <size_t NumSizes>
-  using PartialType = internal_layout::LayoutType<NumSizes, Ts...>;
-
-  // `Layout` knows the element types of the arrays we want to lay out in
-  // memory but not the number of elements in each array.
-  // `Partial(size1, ..., sizeN)` allows us to specify the latter. The
-  // resulting immutable object can be used to obtain pointers to the
-  // individual arrays.
-  //
-  // It's allowed to pass fewer array sizes than the number of arrays. E.g.,
-  // if all you need is to the offset of the second array, you only need to
-  // pass one argument -- the number of elements in the first array.
-  //
-  //   // int[3] followed by 4 bytes of padding and an unknown number of
-  //   // doubles.
-  //   auto x = Layout<int, double>::Partial(3);
-  //   // doubles start at byte 16.
-  //   assert(x.Offset<1>() == 16);
-  //
-  // If you know the number of elements in all arrays, you can still call
-  // `Partial()` but it's more convenient to use the constructor of `Layout`.
-  //
-  //   Layout<int, double> x(3, 5);
-  //
-  // Note: The sizes of the arrays must be specified in number of elements,
-  // not in bytes.
-  //
-  // Requires: `sizeof...(Sizes) <= sizeof...(Ts)`.
-  // Requires: all arguments are convertible to `size_t`.
-  template <class... Sizes>
-  static constexpr PartialType<sizeof...(Sizes)> Partial(Sizes&&... sizes) {
-    static_assert(sizeof...(Sizes) <= sizeof...(Ts), "");
-    return PartialType<sizeof...(Sizes)>(absl::forward<Sizes>(sizes)...);
-  }
-
-  // Creates a layout with the sizes of all arrays specified. If you know
-  // only the sizes of the first N arrays (where N can be zero), you can use
-  // `Partial()` defined above. The constructor is essentially equivalent to
-  // calling `Partial()` and passing in all array sizes; the constructor is
-  // provided as a convenient abbreviation.
-  //
-  // Note: The sizes of the arrays must be specified in number of elements,
-  // not in bytes.
-  constexpr explicit Layout(internal_layout::TypeToSize<Ts>... sizes)
-      : internal_layout::LayoutType<sizeof...(Ts), Ts...>(sizes...) {}
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_LAYOUT_H_
diff --git a/third_party/abseil/absl/container/internal/layout_benchmark.cc b/third_party/abseil/absl/container/internal/layout_benchmark.cc
deleted file mode 100644
index d8636e8..0000000
--- a/third_party/abseil/absl/container/internal/layout_benchmark.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Every benchmark should have the same performance as the corresponding
-// headroom benchmark.
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/internal/layout.h"
-#include "benchmark/benchmark.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::benchmark::DoNotOptimize;
-
-using Int128 = int64_t[2];
-
-// This benchmark provides the upper bound on performance for BM_OffsetConstant.
-template <size_t Offset, class... Ts>
-void BM_OffsetConstantHeadroom(benchmark::State& state) {
-  for (auto _ : state) {
-    DoNotOptimize(Offset);
-  }
-}
-
-template <size_t Offset, class... Ts>
-void BM_OffsetConstant(benchmark::State& state) {
-  using L = Layout<Ts...>;
-  ABSL_RAW_CHECK(L::Partial(3, 5, 7).template Offset<3>() == Offset,
-                 "Invalid offset");
-  for (auto _ : state) {
-    DoNotOptimize(L::Partial(3, 5, 7).template Offset<3>());
-  }
-}
-
-template <class... Ts>
-size_t VariableOffset(size_t n, size_t m, size_t k);
-
-template <>
-size_t VariableOffset<int8_t, int16_t, int32_t, Int128>(size_t n, size_t m,
-                                                        size_t k) {
-  auto Align = [](size_t n, size_t m) { return (n + m - 1) & ~(m - 1); };
-  return Align(Align(Align(n * 1, 2) + m * 2, 4) + k * 4, 8);
-}
-
-template <>
-size_t VariableOffset<Int128, int32_t, int16_t, int8_t>(size_t n, size_t m,
-                                                        size_t k) {
-  // No alignment is necessary.
-  return n * 16 + m * 4 + k * 2;
-}
-
-// This benchmark provides the upper bound on performance for BM_OffsetVariable.
-template <size_t Offset, class... Ts>
-void BM_OffsetVariableHeadroom(benchmark::State& state) {
-  size_t n = 3;
-  size_t m = 5;
-  size_t k = 7;
-  ABSL_RAW_CHECK(VariableOffset<Ts...>(n, m, k) == Offset, "Invalid offset");
-  for (auto _ : state) {
-    DoNotOptimize(n);
-    DoNotOptimize(m);
-    DoNotOptimize(k);
-    DoNotOptimize(VariableOffset<Ts...>(n, m, k));
-  }
-}
-
-template <size_t Offset, class... Ts>
-void BM_OffsetVariable(benchmark::State& state) {
-  using L = Layout<Ts...>;
-  size_t n = 3;
-  size_t m = 5;
-  size_t k = 7;
-  ABSL_RAW_CHECK(L::Partial(n, m, k).template Offset<3>() == Offset,
-                 "Inavlid offset");
-  for (auto _ : state) {
-    DoNotOptimize(n);
-    DoNotOptimize(m);
-    DoNotOptimize(k);
-    DoNotOptimize(L::Partial(n, m, k).template Offset<3>());
-  }
-}
-
-// Run all benchmarks in two modes:
-//
-//   Layout with padding: int8_t[3], int16_t[5], int32_t[7], Int128[?].
-//   Layout without padding: Int128[3], int32_t[5], int16_t[7], int8_t[?].
-
-#define OFFSET_BENCHMARK(NAME, OFFSET, T1, T2, T3, T4) \
-  auto& NAME##_##OFFSET##_##T1##_##T2##_##T3##_##T4 =  \
-      NAME<OFFSET, T1, T2, T3, T4>;                    \
-  BENCHMARK(NAME##_##OFFSET##_##T1##_##T2##_##T3##_##T4)
-
-OFFSET_BENCHMARK(BM_OffsetConstantHeadroom, 48, int8_t, int16_t, int32_t,
-                 Int128);
-OFFSET_BENCHMARK(BM_OffsetConstant, 48, int8_t, int16_t, int32_t, Int128);
-OFFSET_BENCHMARK(BM_OffsetConstantHeadroom, 82, Int128, int32_t, int16_t,
-                 int8_t);
-OFFSET_BENCHMARK(BM_OffsetConstant, 82, Int128, int32_t, int16_t, int8_t);
-OFFSET_BENCHMARK(BM_OffsetVariableHeadroom, 48, int8_t, int16_t, int32_t,
-                 Int128);
-OFFSET_BENCHMARK(BM_OffsetVariable, 48, int8_t, int16_t, int32_t, Int128);
-OFFSET_BENCHMARK(BM_OffsetVariableHeadroom, 82, Int128, int32_t, int16_t,
-                 int8_t);
-OFFSET_BENCHMARK(BM_OffsetVariable, 82, Int128, int32_t, int16_t, int8_t);
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/layout_test.cc b/third_party/abseil/absl/container/internal/layout_test.cc
deleted file mode 100644
index 1d7158f..0000000
--- a/third_party/abseil/absl/container/internal/layout_test.cc
+++ /dev/null
@@ -1,1635 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/layout.h"
-
-// We need ::max_align_t because some libstdc++ versions don't provide
-// std::max_align_t
-#include <stddef.h>
-
-#include <cstdint>
-#include <memory>
-#include <sstream>
-#include <type_traits>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::absl::Span;
-using ::testing::ElementsAre;
-
-size_t Distance(const void* from, const void* to) {
-  ABSL_RAW_CHECK(from <= to, "Distance must be non-negative");
-  return static_cast<const char*>(to) - static_cast<const char*>(from);
-}
-
-template <class Expected, class Actual>
-Expected Type(Actual val) {
-  static_assert(std::is_same<Expected, Actual>(), "");
-  return val;
-}
-
-// Helper classes to test different size and alignments.
-struct alignas(8) Int128 {
-  uint64_t a, b;
-  friend bool operator==(Int128 lhs, Int128 rhs) {
-    return std::tie(lhs.a, lhs.b) == std::tie(rhs.a, rhs.b);
-  }
-
-  static std::string Name() {
-    return internal_layout::adl_barrier::TypeName<Int128>();
-  }
-};
-
-// int64_t is *not* 8-byte aligned on all platforms!
-struct alignas(8) Int64 {
-  int64_t a;
-  friend bool operator==(Int64 lhs, Int64 rhs) {
-    return lhs.a == rhs.a;
-  }
-};
-
-// Properties of types that this test relies on.
-static_assert(sizeof(int8_t) == 1, "");
-static_assert(alignof(int8_t) == 1, "");
-static_assert(sizeof(int16_t) == 2, "");
-static_assert(alignof(int16_t) == 2, "");
-static_assert(sizeof(int32_t) == 4, "");
-static_assert(alignof(int32_t) == 4, "");
-static_assert(sizeof(Int64) == 8, "");
-static_assert(alignof(Int64) == 8, "");
-static_assert(sizeof(Int128) == 16, "");
-static_assert(alignof(Int128) == 8, "");
-
-template <class Expected, class Actual>
-void SameType() {
-  static_assert(std::is_same<Expected, Actual>(), "");
-}
-
-TEST(Layout, ElementType) {
-  {
-    using L = Layout<int32_t>;
-    SameType<int32_t, L::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial())::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial(0))::ElementType<0>>();
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    SameType<int32_t, L::ElementType<0>>();
-    SameType<int32_t, L::ElementType<1>>();
-    SameType<int32_t, decltype(L::Partial())::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial())::ElementType<1>>();
-    SameType<int32_t, decltype(L::Partial(0))::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial(0))::ElementType<1>>();
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    SameType<int8_t, L::ElementType<0>>();
-    SameType<int32_t, L::ElementType<1>>();
-    SameType<Int128, L::ElementType<2>>();
-    SameType<int8_t, decltype(L::Partial())::ElementType<0>>();
-    SameType<int8_t, decltype(L::Partial(0))::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial(0))::ElementType<1>>();
-    SameType<int8_t, decltype(L::Partial(0, 0))::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial(0, 0))::ElementType<1>>();
-    SameType<Int128, decltype(L::Partial(0, 0))::ElementType<2>>();
-    SameType<int8_t, decltype(L::Partial(0, 0, 0))::ElementType<0>>();
-    SameType<int32_t, decltype(L::Partial(0, 0, 0))::ElementType<1>>();
-    SameType<Int128, decltype(L::Partial(0, 0, 0))::ElementType<2>>();
-  }
-}
-
-TEST(Layout, ElementTypes) {
-  {
-    using L = Layout<int32_t>;
-    SameType<std::tuple<int32_t>, L::ElementTypes>();
-    SameType<std::tuple<int32_t>, decltype(L::Partial())::ElementTypes>();
-    SameType<std::tuple<int32_t>, decltype(L::Partial(0))::ElementTypes>();
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    SameType<std::tuple<int32_t, int32_t>, L::ElementTypes>();
-    SameType<std::tuple<int32_t, int32_t>,
-             decltype(L::Partial())::ElementTypes>();
-    SameType<std::tuple<int32_t, int32_t>,
-             decltype(L::Partial(0))::ElementTypes>();
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    SameType<std::tuple<int8_t, int32_t, Int128>, L::ElementTypes>();
-    SameType<std::tuple<int8_t, int32_t, Int128>,
-             decltype(L::Partial())::ElementTypes>();
-    SameType<std::tuple<int8_t, int32_t, Int128>,
-             decltype(L::Partial(0))::ElementTypes>();
-    SameType<std::tuple<int8_t, int32_t, Int128>,
-             decltype(L::Partial(0, 0))::ElementTypes>();
-    SameType<std::tuple<int8_t, int32_t, Int128>,
-             decltype(L::Partial(0, 0, 0))::ElementTypes>();
-  }
-}
-
-TEST(Layout, OffsetByIndex) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial().Offset<0>());
-    EXPECT_EQ(0, L::Partial(3).Offset<0>());
-    EXPECT_EQ(0, L(3).Offset<0>());
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(0, L::Partial().Offset<0>());
-    EXPECT_EQ(0, L::Partial(3).Offset<0>());
-    EXPECT_EQ(12, L::Partial(3).Offset<1>());
-    EXPECT_EQ(0, L::Partial(3, 5).Offset<0>());
-    EXPECT_EQ(12, L::Partial(3, 5).Offset<1>());
-    EXPECT_EQ(0, L(3, 5).Offset<0>());
-    EXPECT_EQ(12, L(3, 5).Offset<1>());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(0, L::Partial().Offset<0>());
-    EXPECT_EQ(0, L::Partial(0).Offset<0>());
-    EXPECT_EQ(0, L::Partial(0).Offset<1>());
-    EXPECT_EQ(0, L::Partial(1).Offset<0>());
-    EXPECT_EQ(4, L::Partial(1).Offset<1>());
-    EXPECT_EQ(0, L::Partial(5).Offset<0>());
-    EXPECT_EQ(8, L::Partial(5).Offset<1>());
-    EXPECT_EQ(0, L::Partial(0, 0).Offset<0>());
-    EXPECT_EQ(0, L::Partial(0, 0).Offset<1>());
-    EXPECT_EQ(0, L::Partial(0, 0).Offset<2>());
-    EXPECT_EQ(0, L::Partial(1, 0).Offset<0>());
-    EXPECT_EQ(4, L::Partial(1, 0).Offset<1>());
-    EXPECT_EQ(8, L::Partial(1, 0).Offset<2>());
-    EXPECT_EQ(0, L::Partial(5, 3).Offset<0>());
-    EXPECT_EQ(8, L::Partial(5, 3).Offset<1>());
-    EXPECT_EQ(24, L::Partial(5, 3).Offset<2>());
-    EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<0>());
-    EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<1>());
-    EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<2>());
-    EXPECT_EQ(0, L::Partial(1, 0, 0).Offset<0>());
-    EXPECT_EQ(4, L::Partial(1, 0, 0).Offset<1>());
-    EXPECT_EQ(8, L::Partial(1, 0, 0).Offset<2>());
-    EXPECT_EQ(0, L::Partial(5, 3, 1).Offset<0>());
-    EXPECT_EQ(24, L::Partial(5, 3, 1).Offset<2>());
-    EXPECT_EQ(8, L::Partial(5, 3, 1).Offset<1>());
-    EXPECT_EQ(0, L(5, 3, 1).Offset<0>());
-    EXPECT_EQ(24, L(5, 3, 1).Offset<2>());
-    EXPECT_EQ(8, L(5, 3, 1).Offset<1>());
-  }
-}
-
-TEST(Layout, OffsetByType) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial().Offset<int32_t>());
-    EXPECT_EQ(0, L::Partial(3).Offset<int32_t>());
-    EXPECT_EQ(0, L(3).Offset<int32_t>());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(0, L::Partial().Offset<int8_t>());
-    EXPECT_EQ(0, L::Partial(0).Offset<int8_t>());
-    EXPECT_EQ(0, L::Partial(0).Offset<int32_t>());
-    EXPECT_EQ(0, L::Partial(1).Offset<int8_t>());
-    EXPECT_EQ(4, L::Partial(1).Offset<int32_t>());
-    EXPECT_EQ(0, L::Partial(5).Offset<int8_t>());
-    EXPECT_EQ(8, L::Partial(5).Offset<int32_t>());
-    EXPECT_EQ(0, L::Partial(0, 0).Offset<int8_t>());
-    EXPECT_EQ(0, L::Partial(0, 0).Offset<int32_t>());
-    EXPECT_EQ(0, L::Partial(0, 0).Offset<Int128>());
-    EXPECT_EQ(0, L::Partial(1, 0).Offset<int8_t>());
-    EXPECT_EQ(4, L::Partial(1, 0).Offset<int32_t>());
-    EXPECT_EQ(8, L::Partial(1, 0).Offset<Int128>());
-    EXPECT_EQ(0, L::Partial(5, 3).Offset<int8_t>());
-    EXPECT_EQ(8, L::Partial(5, 3).Offset<int32_t>());
-    EXPECT_EQ(24, L::Partial(5, 3).Offset<Int128>());
-    EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<int8_t>());
-    EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<int32_t>());
-    EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<Int128>());
-    EXPECT_EQ(0, L::Partial(1, 0, 0).Offset<int8_t>());
-    EXPECT_EQ(4, L::Partial(1, 0, 0).Offset<int32_t>());
-    EXPECT_EQ(8, L::Partial(1, 0, 0).Offset<Int128>());
-    EXPECT_EQ(0, L::Partial(5, 3, 1).Offset<int8_t>());
-    EXPECT_EQ(24, L::Partial(5, 3, 1).Offset<Int128>());
-    EXPECT_EQ(8, L::Partial(5, 3, 1).Offset<int32_t>());
-    EXPECT_EQ(0, L(5, 3, 1).Offset<int8_t>());
-    EXPECT_EQ(24, L(5, 3, 1).Offset<Int128>());
-    EXPECT_EQ(8, L(5, 3, 1).Offset<int32_t>());
-  }
-}
-
-TEST(Layout, Offsets) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_THAT(L::Partial().Offsets(), ElementsAre(0));
-    EXPECT_THAT(L::Partial(3).Offsets(), ElementsAre(0));
-    EXPECT_THAT(L(3).Offsets(), ElementsAre(0));
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_THAT(L::Partial().Offsets(), ElementsAre(0));
-    EXPECT_THAT(L::Partial(3).Offsets(), ElementsAre(0, 12));
-    EXPECT_THAT(L::Partial(3, 5).Offsets(), ElementsAre(0, 12));
-    EXPECT_THAT(L(3, 5).Offsets(), ElementsAre(0, 12));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_THAT(L::Partial().Offsets(), ElementsAre(0));
-    EXPECT_THAT(L::Partial(1).Offsets(), ElementsAre(0, 4));
-    EXPECT_THAT(L::Partial(5).Offsets(), ElementsAre(0, 8));
-    EXPECT_THAT(L::Partial(0, 0).Offsets(), ElementsAre(0, 0, 0));
-    EXPECT_THAT(L::Partial(1, 0).Offsets(), ElementsAre(0, 4, 8));
-    EXPECT_THAT(L::Partial(5, 3).Offsets(), ElementsAre(0, 8, 24));
-    EXPECT_THAT(L::Partial(0, 0, 0).Offsets(), ElementsAre(0, 0, 0));
-    EXPECT_THAT(L::Partial(1, 0, 0).Offsets(), ElementsAre(0, 4, 8));
-    EXPECT_THAT(L::Partial(5, 3, 1).Offsets(), ElementsAre(0, 8, 24));
-    EXPECT_THAT(L(5, 3, 1).Offsets(), ElementsAre(0, 8, 24));
-  }
-}
-
-TEST(Layout, AllocSize) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).AllocSize());
-    EXPECT_EQ(12, L::Partial(3).AllocSize());
-    EXPECT_EQ(12, L(3).AllocSize());
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(32, L::Partial(3, 5).AllocSize());
-    EXPECT_EQ(32, L(3, 5).AllocSize());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(0, L::Partial(0, 0, 0).AllocSize());
-    EXPECT_EQ(8, L::Partial(1, 0, 0).AllocSize());
-    EXPECT_EQ(8, L::Partial(0, 1, 0).AllocSize());
-    EXPECT_EQ(16, L::Partial(0, 0, 1).AllocSize());
-    EXPECT_EQ(24, L::Partial(1, 1, 1).AllocSize());
-    EXPECT_EQ(136, L::Partial(3, 5, 7).AllocSize());
-    EXPECT_EQ(136, L(3, 5, 7).AllocSize());
-  }
-}
-
-TEST(Layout, SizeByIndex) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Size<0>());
-    EXPECT_EQ(3, L::Partial(3).Size<0>());
-    EXPECT_EQ(3, L(3).Size<0>());
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Size<0>());
-    EXPECT_EQ(3, L::Partial(3).Size<0>());
-    EXPECT_EQ(3, L::Partial(3, 5).Size<0>());
-    EXPECT_EQ(5, L::Partial(3, 5).Size<1>());
-    EXPECT_EQ(3, L(3, 5).Size<0>());
-    EXPECT_EQ(5, L(3, 5).Size<1>());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(3, L::Partial(3).Size<0>());
-    EXPECT_EQ(3, L::Partial(3, 5).Size<0>());
-    EXPECT_EQ(5, L::Partial(3, 5).Size<1>());
-    EXPECT_EQ(3, L::Partial(3, 5, 7).Size<0>());
-    EXPECT_EQ(5, L::Partial(3, 5, 7).Size<1>());
-    EXPECT_EQ(7, L::Partial(3, 5, 7).Size<2>());
-    EXPECT_EQ(3, L(3, 5, 7).Size<0>());
-    EXPECT_EQ(5, L(3, 5, 7).Size<1>());
-    EXPECT_EQ(7, L(3, 5, 7).Size<2>());
-  }
-}
-
-TEST(Layout, SizeByType) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Size<int32_t>());
-    EXPECT_EQ(3, L::Partial(3).Size<int32_t>());
-    EXPECT_EQ(3, L(3).Size<int32_t>());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(3, L::Partial(3).Size<int8_t>());
-    EXPECT_EQ(3, L::Partial(3, 5).Size<int8_t>());
-    EXPECT_EQ(5, L::Partial(3, 5).Size<int32_t>());
-    EXPECT_EQ(3, L::Partial(3, 5, 7).Size<int8_t>());
-    EXPECT_EQ(5, L::Partial(3, 5, 7).Size<int32_t>());
-    EXPECT_EQ(7, L::Partial(3, 5, 7).Size<Int128>());
-    EXPECT_EQ(3, L(3, 5, 7).Size<int8_t>());
-    EXPECT_EQ(5, L(3, 5, 7).Size<int32_t>());
-    EXPECT_EQ(7, L(3, 5, 7).Size<Int128>());
-  }
-}
-
-TEST(Layout, Sizes) {
-  {
-    using L = Layout<int32_t>;
-    EXPECT_THAT(L::Partial().Sizes(), ElementsAre());
-    EXPECT_THAT(L::Partial(3).Sizes(), ElementsAre(3));
-    EXPECT_THAT(L(3).Sizes(), ElementsAre(3));
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_THAT(L::Partial().Sizes(), ElementsAre());
-    EXPECT_THAT(L::Partial(3).Sizes(), ElementsAre(3));
-    EXPECT_THAT(L::Partial(3, 5).Sizes(), ElementsAre(3, 5));
-    EXPECT_THAT(L(3, 5).Sizes(), ElementsAre(3, 5));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_THAT(L::Partial().Sizes(), ElementsAre());
-    EXPECT_THAT(L::Partial(3).Sizes(), ElementsAre(3));
-    EXPECT_THAT(L::Partial(3, 5).Sizes(), ElementsAre(3, 5));
-    EXPECT_THAT(L::Partial(3, 5, 7).Sizes(), ElementsAre(3, 5, 7));
-    EXPECT_THAT(L(3, 5, 7).Sizes(), ElementsAre(3, 5, 7));
-  }
-}
-
-TEST(Layout, PointerByIndex) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial().Pointer<0>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L(3).Pointer<0>(p))));
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial().Pointer<0>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<0>(p))));
-    EXPECT_EQ(12,
-              Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<1>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int32_t*>(L::Partial(3, 5).Pointer<0>(p))));
-    EXPECT_EQ(
-        12, Distance(p, Type<const int32_t*>(L::Partial(3, 5).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L(3, 5).Pointer<0>(p))));
-    EXPECT_EQ(12, Distance(p, Type<const int32_t*>(L(3, 5).Pointer<1>(p))));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial().Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial(0).Pointer<0>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const int32_t*>(L::Partial(0).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial(1).Pointer<0>(p))));
-    EXPECT_EQ(4,
-              Distance(p, Type<const int32_t*>(L::Partial(1).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial(5).Pointer<0>(p))));
-    EXPECT_EQ(8,
-              Distance(p, Type<const int32_t*>(L::Partial(5).Pointer<1>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const int8_t*>(L::Partial(0, 0).Pointer<0>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int32_t*>(L::Partial(0, 0).Pointer<1>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const Int128*>(L::Partial(0, 0).Pointer<2>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const int8_t*>(L::Partial(1, 0).Pointer<0>(p))));
-    EXPECT_EQ(
-        4, Distance(p, Type<const int32_t*>(L::Partial(1, 0).Pointer<1>(p))));
-    EXPECT_EQ(8,
-              Distance(p, Type<const Int128*>(L::Partial(1, 0).Pointer<2>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<const int8_t*>(L::Partial(5, 3).Pointer<0>(p))));
-    EXPECT_EQ(
-        8, Distance(p, Type<const int32_t*>(L::Partial(5, 3).Pointer<1>(p))));
-    EXPECT_EQ(24,
-              Distance(p, Type<const Int128*>(L::Partial(5, 3).Pointer<2>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial(0, 0, 0).Pointer<0>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const int32_t*>(L::Partial(0, 0, 0).Pointer<1>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const Int128*>(L::Partial(0, 0, 0).Pointer<2>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial(1, 0, 0).Pointer<0>(p))));
-    EXPECT_EQ(
-        4,
-        Distance(p, Type<const int32_t*>(L::Partial(1, 0, 0).Pointer<1>(p))));
-    EXPECT_EQ(
-        8, Distance(p, Type<const Int128*>(L::Partial(1, 0, 0).Pointer<2>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial(5, 3, 1).Pointer<0>(p))));
-    EXPECT_EQ(
-        24,
-        Distance(p, Type<const Int128*>(L::Partial(5, 3, 1).Pointer<2>(p))));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<const int32_t*>(L::Partial(5, 3, 1).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L(5, 3, 1).Pointer<0>(p))));
-    EXPECT_EQ(24, Distance(p, Type<const Int128*>(L(5, 3, 1).Pointer<2>(p))));
-    EXPECT_EQ(8, Distance(p, Type<const int32_t*>(L(5, 3, 1).Pointer<1>(p))));
-  }
-}
-
-TEST(Layout, PointerByType) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(
-        0, Distance(p, Type<const int32_t*>(L::Partial().Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<int32_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L(3).Pointer<int32_t>(p))));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial().Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial(0).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const int32_t*>(L::Partial(0).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial(1).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        4,
-        Distance(p, Type<const int32_t*>(L::Partial(1).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<const int8_t*>(L::Partial(5).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<const int32_t*>(L::Partial(5).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const int8_t*>(L::Partial(0, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(
-                                 L::Partial(0, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const Int128*>(L::Partial(0, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const int8_t*>(L::Partial(1, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(4, Distance(p, Type<const int32_t*>(
-                                 L::Partial(1, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<const Int128*>(L::Partial(1, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<const int8_t*>(L::Partial(5, 3).Pointer<int8_t>(p))));
-    EXPECT_EQ(8, Distance(p, Type<const int32_t*>(
-                                 L::Partial(5, 3).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        24,
-        Distance(p, Type<const Int128*>(L::Partial(5, 3).Pointer<Int128>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(
-                                 L::Partial(0, 0, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int32_t*>(
-                                 L::Partial(0, 0, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const Int128*>(
-                                 L::Partial(0, 0, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(
-                                 L::Partial(1, 0, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(4, Distance(p, Type<const int32_t*>(
-                                 L::Partial(1, 0, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(8, Distance(p, Type<const Int128*>(
-                                 L::Partial(1, 0, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(0, Distance(p, Type<const int8_t*>(
-                                 L::Partial(5, 3, 1).Pointer<int8_t>(p))));
-    EXPECT_EQ(24, Distance(p, Type<const Int128*>(
-                                  L::Partial(5, 3, 1).Pointer<Int128>(p))));
-    EXPECT_EQ(8, Distance(p, Type<const int32_t*>(
-                                 L::Partial(5, 3, 1).Pointer<int32_t>(p))));
-    EXPECT_EQ(24,
-              Distance(p, Type<const Int128*>(L(5, 3, 1).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        8, Distance(p, Type<const int32_t*>(L(5, 3, 1).Pointer<int32_t>(p))));
-  }
-}
-
-TEST(Layout, MutablePointerByIndex) {
-  alignas(max_align_t) unsigned char p[100];
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial().Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L(3).Pointer<0>(p))));
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial().Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<0>(p))));
-    EXPECT_EQ(12, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3, 5).Pointer<0>(p))));
-    EXPECT_EQ(12, Distance(p, Type<int32_t*>(L::Partial(3, 5).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L(3, 5).Pointer<0>(p))));
-    EXPECT_EQ(12, Distance(p, Type<int32_t*>(L(3, 5).Pointer<1>(p))));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial().Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0).Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1).Pointer<0>(p))));
-    EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5).Pointer<0>(p))));
-    EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0, 0).Pointer<0>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0, 0).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<Int128*>(L::Partial(0, 0).Pointer<2>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1, 0).Pointer<0>(p))));
-    EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1, 0).Pointer<1>(p))));
-    EXPECT_EQ(8, Distance(p, Type<Int128*>(L::Partial(1, 0).Pointer<2>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5, 3).Pointer<0>(p))));
-    EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5, 3).Pointer<1>(p))));
-    EXPECT_EQ(24, Distance(p, Type<Int128*>(L::Partial(5, 3).Pointer<2>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0, 0, 0).Pointer<0>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<int32_t*>(L::Partial(0, 0, 0).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<Int128*>(L::Partial(0, 0, 0).Pointer<2>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1, 0, 0).Pointer<0>(p))));
-    EXPECT_EQ(4,
-              Distance(p, Type<int32_t*>(L::Partial(1, 0, 0).Pointer<1>(p))));
-    EXPECT_EQ(8, Distance(p, Type<Int128*>(L::Partial(1, 0, 0).Pointer<2>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5, 3, 1).Pointer<0>(p))));
-    EXPECT_EQ(24,
-              Distance(p, Type<Int128*>(L::Partial(5, 3, 1).Pointer<2>(p))));
-    EXPECT_EQ(8,
-              Distance(p, Type<int32_t*>(L::Partial(5, 3, 1).Pointer<1>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L(5, 3, 1).Pointer<0>(p))));
-    EXPECT_EQ(24, Distance(p, Type<Int128*>(L(5, 3, 1).Pointer<2>(p))));
-    EXPECT_EQ(8, Distance(p, Type<int32_t*>(L(5, 3, 1).Pointer<1>(p))));
-  }
-}
-
-TEST(Layout, MutablePointerByType) {
-  alignas(max_align_t) unsigned char p[100];
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial().Pointer<int32_t>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<int32_t*>(L::Partial(3).Pointer<int32_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int32_t*>(L(3).Pointer<int32_t>(p))));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial().Pointer<int8_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0).Pointer<int8_t>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<int32_t*>(L::Partial(0).Pointer<int32_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1).Pointer<int8_t>(p))));
-    EXPECT_EQ(4,
-              Distance(p, Type<int32_t*>(L::Partial(1).Pointer<int32_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5).Pointer<int8_t>(p))));
-    EXPECT_EQ(8,
-              Distance(p, Type<int32_t*>(L::Partial(5).Pointer<int32_t>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<int8_t*>(L::Partial(0, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<int32_t*>(L::Partial(0, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<Int128*>(L::Partial(0, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<int8_t*>(L::Partial(1, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        4, Distance(p, Type<int32_t*>(L::Partial(1, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(8,
-              Distance(p, Type<Int128*>(L::Partial(1, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(0,
-              Distance(p, Type<int8_t*>(L::Partial(5, 3).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        8, Distance(p, Type<int32_t*>(L::Partial(5, 3).Pointer<int32_t>(p))));
-    EXPECT_EQ(24,
-              Distance(p, Type<Int128*>(L::Partial(5, 3).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<int8_t*>(L::Partial(0, 0, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<int32_t*>(L::Partial(0, 0, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<Int128*>(L::Partial(0, 0, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<int8_t*>(L::Partial(1, 0, 0).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        4,
-        Distance(p, Type<int32_t*>(L::Partial(1, 0, 0).Pointer<int32_t>(p))));
-    EXPECT_EQ(
-        8, Distance(p, Type<Int128*>(L::Partial(1, 0, 0).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        0, Distance(p, Type<int8_t*>(L::Partial(5, 3, 1).Pointer<int8_t>(p))));
-    EXPECT_EQ(
-        24, Distance(p, Type<Int128*>(L::Partial(5, 3, 1).Pointer<Int128>(p))));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<int32_t*>(L::Partial(5, 3, 1).Pointer<int32_t>(p))));
-    EXPECT_EQ(0, Distance(p, Type<int8_t*>(L(5, 3, 1).Pointer<int8_t>(p))));
-    EXPECT_EQ(24, Distance(p, Type<Int128*>(L(5, 3, 1).Pointer<Int128>(p))));
-    EXPECT_EQ(8, Distance(p, Type<int32_t*>(L(5, 3, 1).Pointer<int32_t>(p))));
-  }
-}
-
-TEST(Layout, Pointers) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  using L = Layout<int8_t, int8_t, Int128>;
-  {
-    const auto x = L::Partial();
-    EXPECT_EQ(std::make_tuple(x.Pointer<0>(p)),
-              Type<std::tuple<const int8_t*>>(x.Pointers(p)));
-  }
-  {
-    const auto x = L::Partial(1);
-    EXPECT_EQ(std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p)),
-              (Type<std::tuple<const int8_t*, const int8_t*>>(x.Pointers(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2);
-    EXPECT_EQ(
-        std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
-        (Type<std::tuple<const int8_t*, const int8_t*, const Int128*>>(
-            x.Pointers(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2, 3);
-    EXPECT_EQ(
-        std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
-        (Type<std::tuple<const int8_t*, const int8_t*, const Int128*>>(
-            x.Pointers(p))));
-  }
-  {
-    const L x(1, 2, 3);
-    EXPECT_EQ(
-        std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
-        (Type<std::tuple<const int8_t*, const int8_t*, const Int128*>>(
-            x.Pointers(p))));
-  }
-}
-
-TEST(Layout, MutablePointers) {
-  alignas(max_align_t) unsigned char p[100];
-  using L = Layout<int8_t, int8_t, Int128>;
-  {
-    const auto x = L::Partial();
-    EXPECT_EQ(std::make_tuple(x.Pointer<0>(p)),
-              Type<std::tuple<int8_t*>>(x.Pointers(p)));
-  }
-  {
-    const auto x = L::Partial(1);
-    EXPECT_EQ(std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p)),
-              (Type<std::tuple<int8_t*, int8_t*>>(x.Pointers(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2);
-    EXPECT_EQ(
-        std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
-        (Type<std::tuple<int8_t*, int8_t*, Int128*>>(x.Pointers(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2, 3);
-    EXPECT_EQ(
-        std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
-        (Type<std::tuple<int8_t*, int8_t*, Int128*>>(x.Pointers(p))));
-  }
-  {
-    const L x(1, 2, 3);
-    EXPECT_EQ(
-        std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
-        (Type<std::tuple<int8_t*, int8_t*, Int128*>>(x.Pointers(p))));
-  }
-}
-
-TEST(Layout, SliceByIndexSize) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Slice<0>(p).size());
-    EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
-    EXPECT_EQ(3, L(3).Slice<0>(p).size());
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
-    EXPECT_EQ(5, L(3, 5).Slice<1>(p).size());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5).Slice<0>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<0>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<1>(p).size());
-    EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<2>(p).size());
-    EXPECT_EQ(3, L(3, 5, 7).Slice<0>(p).size());
-    EXPECT_EQ(5, L(3, 5, 7).Slice<1>(p).size());
-    EXPECT_EQ(7, L(3, 5, 7).Slice<2>(p).size());
-  }
-}
-
-TEST(Layout, SliceByTypeSize) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Slice<int32_t>(p).size());
-    EXPECT_EQ(3, L::Partial(3).Slice<int32_t>(p).size());
-    EXPECT_EQ(3, L(3).Slice<int32_t>(p).size());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(3, L::Partial(3).Slice<int8_t>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5).Slice<int8_t>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5).Slice<int32_t>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<int8_t>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<int32_t>(p).size());
-    EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<Int128>(p).size());
-    EXPECT_EQ(3, L(3, 5, 7).Slice<int8_t>(p).size());
-    EXPECT_EQ(5, L(3, 5, 7).Slice<int32_t>(p).size());
-    EXPECT_EQ(7, L(3, 5, 7).Slice<Int128>(p).size());
-  }
-}
-
-TEST(Layout, MutableSliceByIndexSize) {
-  alignas(max_align_t) unsigned char p[100];
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Slice<0>(p).size());
-    EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
-    EXPECT_EQ(3, L(3).Slice<0>(p).size());
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
-    EXPECT_EQ(5, L(3, 5).Slice<1>(p).size());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5).Slice<0>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<0>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<1>(p).size());
-    EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<2>(p).size());
-    EXPECT_EQ(3, L(3, 5, 7).Slice<0>(p).size());
-    EXPECT_EQ(5, L(3, 5, 7).Slice<1>(p).size());
-    EXPECT_EQ(7, L(3, 5, 7).Slice<2>(p).size());
-  }
-}
-
-TEST(Layout, MutableSliceByTypeSize) {
-  alignas(max_align_t) unsigned char p[100];
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(0, L::Partial(0).Slice<int32_t>(p).size());
-    EXPECT_EQ(3, L::Partial(3).Slice<int32_t>(p).size());
-    EXPECT_EQ(3, L(3).Slice<int32_t>(p).size());
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(3, L::Partial(3).Slice<int8_t>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5).Slice<int8_t>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5).Slice<int32_t>(p).size());
-    EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<int8_t>(p).size());
-    EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<int32_t>(p).size());
-    EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<Int128>(p).size());
-    EXPECT_EQ(3, L(3, 5, 7).Slice<int8_t>(p).size());
-    EXPECT_EQ(5, L(3, 5, 7).Slice<int32_t>(p).size());
-    EXPECT_EQ(7, L(3, 5, 7).Slice<Int128>(p).size());
-  }
-}
-
-TEST(Layout, SliceByIndexData) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<const int32_t>>(L::Partial(0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<const int32_t>>(L::Partial(3).Slice<0>(p)).data()));
-    EXPECT_EQ(0,
-              Distance(p, Type<Span<const int32_t>>(L(3).Slice<0>(p)).data()));
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<const int32_t>>(L::Partial(3).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p, Type<Span<const int32_t>>(L::Partial(3, 5).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        12,
-        Distance(
-            p, Type<Span<const int32_t>>(L::Partial(3, 5).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<const int32_t>>(L(3, 5).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        12, Distance(p, Type<Span<const int32_t>>(L(3, 5).Slice<1>(p)).data()));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<const int8_t>>(L::Partial(0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<const int8_t>>(L::Partial(1).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<const int8_t>>(L::Partial(5).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p, Type<Span<const int8_t>>(L::Partial(0, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p, Type<Span<const int32_t>>(L::Partial(0, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p, Type<Span<const int8_t>>(L::Partial(1, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        4,
-        Distance(
-            p, Type<Span<const int32_t>>(L::Partial(1, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p, Type<Span<const int8_t>>(L::Partial(5, 3).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p, Type<Span<const int32_t>>(L::Partial(5, 3).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int8_t>>(L::Partial(0, 0, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int32_t>>(L::Partial(0, 0, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const Int128>>(L::Partial(0, 0, 0).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int8_t>>(L::Partial(1, 0, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        4,
-        Distance(
-            p,
-            Type<Span<const int32_t>>(L::Partial(1, 0, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p,
-            Type<Span<const Int128>>(L::Partial(1, 0, 0).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int8_t>>(L::Partial(5, 3, 1).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        24,
-        Distance(
-            p,
-            Type<Span<const Int128>>(L::Partial(5, 3, 1).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p,
-            Type<Span<const int32_t>>(L::Partial(5, 3, 1).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<const int8_t>>(L(5, 3, 1).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        24,
-        Distance(p, Type<Span<const Int128>>(L(5, 3, 1).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<Span<const int32_t>>(L(5, 3, 1).Slice<1>(p)).data()));
-  }
-}
-
-TEST(Layout, SliceByTypeData) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int32_t>>(L::Partial(0).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int32_t>>(L::Partial(3).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<const int32_t>>(L(3).Slice<int32_t>(p)).data()));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int8_t>>(L::Partial(0).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int8_t>>(L::Partial(1).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<const int8_t>>(L::Partial(5).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<const int8_t>>(L::Partial(0, 0).Slice<int8_t>(p))
-                        .data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<const int32_t>>(
-                                 L::Partial(0, 0).Slice<int32_t>(p))
-                                 .data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<const int8_t>>(L::Partial(1, 0).Slice<int8_t>(p))
-                        .data()));
-    EXPECT_EQ(4, Distance(p, Type<Span<const int32_t>>(
-                                 L::Partial(1, 0).Slice<int32_t>(p))
-                                 .data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<const int8_t>>(L::Partial(5, 3).Slice<int8_t>(p))
-                        .data()));
-    EXPECT_EQ(8, Distance(p, Type<Span<const int32_t>>(
-                                 L::Partial(5, 3).Slice<int32_t>(p))
-                                 .data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<const int8_t>>(
-                                 L::Partial(0, 0, 0).Slice<int8_t>(p))
-                                 .data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<const int32_t>>(
-                                 L::Partial(0, 0, 0).Slice<int32_t>(p))
-                                 .data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<const Int128>>(
-                                 L::Partial(0, 0, 0).Slice<Int128>(p))
-                                 .data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<const int8_t>>(
-                                 L::Partial(1, 0, 0).Slice<int8_t>(p))
-                                 .data()));
-    EXPECT_EQ(4, Distance(p, Type<Span<const int32_t>>(
-                                 L::Partial(1, 0, 0).Slice<int32_t>(p))
-                                 .data()));
-    EXPECT_EQ(8, Distance(p, Type<Span<const Int128>>(
-                                 L::Partial(1, 0, 0).Slice<Int128>(p))
-                                 .data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<const int8_t>>(
-                                 L::Partial(5, 3, 1).Slice<int8_t>(p))
-                                 .data()));
-    EXPECT_EQ(24, Distance(p, Type<Span<const Int128>>(
-                                  L::Partial(5, 3, 1).Slice<Int128>(p))
-                                  .data()));
-    EXPECT_EQ(8, Distance(p, Type<Span<const int32_t>>(
-                                 L::Partial(5, 3, 1).Slice<int32_t>(p))
-                                 .data()));
-    EXPECT_EQ(
-        0,
-        Distance(p,
-                 Type<Span<const int8_t>>(L(5, 3, 1).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        24,
-        Distance(p,
-                 Type<Span<const Int128>>(L(5, 3, 1).Slice<Int128>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p, Type<Span<const int32_t>>(L(5, 3, 1).Slice<int32_t>(p)).data()));
-  }
-}
-
-TEST(Layout, MutableSliceByIndexData) {
-  alignas(max_align_t) unsigned char p[100];
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int32_t>>(L::Partial(0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int32_t>>(L::Partial(3).Slice<0>(p)).data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<int32_t>>(L(3).Slice<0>(p)).data()));
-  }
-  {
-    using L = Layout<int32_t, int32_t>;
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int32_t>>(L::Partial(3).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int32_t>>(L::Partial(3, 5).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        12,
-        Distance(p, Type<Span<int32_t>>(L::Partial(3, 5).Slice<1>(p)).data()));
-    EXPECT_EQ(0, Distance(p, Type<Span<int32_t>>(L(3, 5).Slice<0>(p)).data()));
-    EXPECT_EQ(12, Distance(p, Type<Span<int32_t>>(L(3, 5).Slice<1>(p)).data()));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int8_t>>(L::Partial(0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int8_t>>(L::Partial(1).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int8_t>>(L::Partial(5).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int8_t>>(L::Partial(0, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int32_t>>(L::Partial(0, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int8_t>>(L::Partial(1, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        4,
-        Distance(p, Type<Span<int32_t>>(L::Partial(1, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int8_t>>(L::Partial(5, 3).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<Span<int32_t>>(L::Partial(5, 3).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<int8_t>>(L::Partial(0, 0, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<int32_t>>(L::Partial(0, 0, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<Int128>>(L::Partial(0, 0, 0).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<int8_t>>(L::Partial(1, 0, 0).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        4, Distance(
-               p, Type<Span<int32_t>>(L::Partial(1, 0, 0).Slice<1>(p)).data()));
-    EXPECT_EQ(
-        8, Distance(
-               p, Type<Span<Int128>>(L::Partial(1, 0, 0).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<int8_t>>(L::Partial(5, 3, 1).Slice<0>(p)).data()));
-    EXPECT_EQ(
-        24, Distance(
-                p, Type<Span<Int128>>(L::Partial(5, 3, 1).Slice<2>(p)).data()));
-    EXPECT_EQ(
-        8, Distance(
-               p, Type<Span<int32_t>>(L::Partial(5, 3, 1).Slice<1>(p)).data()));
-    EXPECT_EQ(0,
-              Distance(p, Type<Span<int8_t>>(L(5, 3, 1).Slice<0>(p)).data()));
-    EXPECT_EQ(24,
-              Distance(p, Type<Span<Int128>>(L(5, 3, 1).Slice<2>(p)).data()));
-    EXPECT_EQ(8,
-              Distance(p, Type<Span<int32_t>>(L(5, 3, 1).Slice<1>(p)).data()));
-  }
-}
-
-TEST(Layout, MutableSliceByTypeData) {
-  alignas(max_align_t) unsigned char p[100];
-  {
-    using L = Layout<int32_t>;
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<int32_t>>(L::Partial(0).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(
-               p, Type<Span<int32_t>>(L::Partial(3).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(0,
-              Distance(p, Type<Span<int32_t>>(L(3).Slice<int32_t>(p)).data()));
-  }
-  {
-    using L = Layout<int8_t, int32_t, Int128>;
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int8_t>>(L::Partial(0).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int8_t>>(L::Partial(1).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p, Type<Span<int8_t>>(L::Partial(5).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p,
-                 Type<Span<int8_t>>(L::Partial(0, 0).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p, Type<Span<int32_t>>(L::Partial(0, 0).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p,
-                 Type<Span<int8_t>>(L::Partial(1, 0).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        4,
-        Distance(
-            p, Type<Span<int32_t>>(L::Partial(1, 0).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(p,
-                 Type<Span<int8_t>>(L::Partial(5, 3).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p, Type<Span<int32_t>>(L::Partial(5, 3).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<int8_t>>(L::Partial(0, 0, 0).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<int32_t>>(L::Partial(0, 0, 0).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<Int128>>(L::Partial(0, 0, 0).Slice<Int128>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<int8_t>>(L::Partial(1, 0, 0).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        4,
-        Distance(
-            p,
-            Type<Span<int32_t>>(L::Partial(1, 0, 0).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p,
-            Type<Span<Int128>>(L::Partial(1, 0, 0).Slice<Int128>(p)).data()));
-    EXPECT_EQ(
-        0,
-        Distance(
-            p,
-            Type<Span<int8_t>>(L::Partial(5, 3, 1).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        24,
-        Distance(
-            p,
-            Type<Span<Int128>>(L::Partial(5, 3, 1).Slice<Int128>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(
-            p,
-            Type<Span<int32_t>>(L::Partial(5, 3, 1).Slice<int32_t>(p)).data()));
-    EXPECT_EQ(
-        0, Distance(p, Type<Span<int8_t>>(L(5, 3, 1).Slice<int8_t>(p)).data()));
-    EXPECT_EQ(
-        24,
-        Distance(p, Type<Span<Int128>>(L(5, 3, 1).Slice<Int128>(p)).data()));
-    EXPECT_EQ(
-        8,
-        Distance(p, Type<Span<int32_t>>(L(5, 3, 1).Slice<int32_t>(p)).data()));
-  }
-}
-
-MATCHER_P(IsSameSlice, slice, "") {
-  return arg.size() == slice.size() && arg.data() == slice.data();
-}
-
-template <typename... M>
-class TupleMatcher {
- public:
-  explicit TupleMatcher(M... matchers) : matchers_(std::move(matchers)...) {}
-
-  template <typename Tuple>
-  bool MatchAndExplain(const Tuple& p,
-                       testing::MatchResultListener* /* listener */) const {
-    static_assert(std::tuple_size<Tuple>::value == sizeof...(M), "");
-    return MatchAndExplainImpl(
-        p, absl::make_index_sequence<std::tuple_size<Tuple>::value>{});
-  }
-
-  // For the matcher concept. Left empty as we don't really need the diagnostics
-  // right now.
-  void DescribeTo(::std::ostream* os) const {}
-  void DescribeNegationTo(::std::ostream* os) const {}
-
- private:
-  template <typename Tuple, size_t... Is>
-  bool MatchAndExplainImpl(const Tuple& p, absl::index_sequence<Is...>) const {
-    // Using std::min as a simple variadic "and".
-    return std::min(
-        {true, testing::SafeMatcherCast<
-                   const typename std::tuple_element<Is, Tuple>::type&>(
-                   std::get<Is>(matchers_))
-                   .Matches(std::get<Is>(p))...});
-  }
-
-  std::tuple<M...> matchers_;
-};
-
-template <typename... M>
-testing::PolymorphicMatcher<TupleMatcher<M...>> Tuple(M... matchers) {
-  return testing::MakePolymorphicMatcher(
-      TupleMatcher<M...>(std::move(matchers)...));
-}
-
-TEST(Layout, Slices) {
-  alignas(max_align_t) const unsigned char p[100] = {};
-  using L = Layout<int8_t, int8_t, Int128>;
-  {
-    const auto x = L::Partial();
-    EXPECT_THAT(Type<std::tuple<>>(x.Slices(p)), Tuple());
-  }
-  {
-    const auto x = L::Partial(1);
-    EXPECT_THAT(Type<std::tuple<Span<const int8_t>>>(x.Slices(p)),
-                Tuple(IsSameSlice(x.Slice<0>(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2);
-    EXPECT_THAT(
-        (Type<std::tuple<Span<const int8_t>, Span<const int8_t>>>(x.Slices(p))),
-        Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2, 3);
-    EXPECT_THAT((Type<std::tuple<Span<const int8_t>, Span<const int8_t>,
-                                 Span<const Int128>>>(x.Slices(p))),
-                Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
-                      IsSameSlice(x.Slice<2>(p))));
-  }
-  {
-    const L x(1, 2, 3);
-    EXPECT_THAT((Type<std::tuple<Span<const int8_t>, Span<const int8_t>,
-                                 Span<const Int128>>>(x.Slices(p))),
-                Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
-                      IsSameSlice(x.Slice<2>(p))));
-  }
-}
-
-TEST(Layout, MutableSlices) {
-  alignas(max_align_t) unsigned char p[100] = {};
-  using L = Layout<int8_t, int8_t, Int128>;
-  {
-    const auto x = L::Partial();
-    EXPECT_THAT(Type<std::tuple<>>(x.Slices(p)), Tuple());
-  }
-  {
-    const auto x = L::Partial(1);
-    EXPECT_THAT(Type<std::tuple<Span<int8_t>>>(x.Slices(p)),
-                Tuple(IsSameSlice(x.Slice<0>(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2);
-    EXPECT_THAT((Type<std::tuple<Span<int8_t>, Span<int8_t>>>(x.Slices(p))),
-                Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p))));
-  }
-  {
-    const auto x = L::Partial(1, 2, 3);
-    EXPECT_THAT((Type<std::tuple<Span<int8_t>, Span<int8_t>, Span<Int128>>>(
-                    x.Slices(p))),
-                Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
-                      IsSameSlice(x.Slice<2>(p))));
-  }
-  {
-    const L x(1, 2, 3);
-    EXPECT_THAT((Type<std::tuple<Span<int8_t>, Span<int8_t>, Span<Int128>>>(
-                    x.Slices(p))),
-                Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
-                      IsSameSlice(x.Slice<2>(p))));
-  }
-}
-
-TEST(Layout, UnalignedTypes) {
-  constexpr Layout<unsigned char, unsigned char, unsigned char> x(1, 2, 3);
-  alignas(max_align_t) unsigned char p[x.AllocSize() + 1];
-  EXPECT_THAT(x.Pointers(p + 1), Tuple(p + 1, p + 2, p + 4));
-}
-
-TEST(Layout, CustomAlignment) {
-  constexpr Layout<unsigned char, Aligned<unsigned char, 8>> x(1, 2);
-  alignas(max_align_t) unsigned char p[x.AllocSize()];
-  EXPECT_EQ(10, x.AllocSize());
-  EXPECT_THAT(x.Pointers(p), Tuple(p + 0, p + 8));
-}
-
-TEST(Layout, OverAligned) {
-  constexpr size_t M = alignof(max_align_t);
-  constexpr Layout<unsigned char, Aligned<unsigned char, 2 * M>> x(1, 3);
-  alignas(2 * M) unsigned char p[x.AllocSize()];
-  EXPECT_EQ(2 * M + 3, x.AllocSize());
-  EXPECT_THAT(x.Pointers(p), Tuple(p + 0, p + 2 * M));
-}
-
-TEST(Layout, Alignment) {
-  static_assert(Layout<int8_t>::Alignment() == 1, "");
-  static_assert(Layout<int32_t>::Alignment() == 4, "");
-  static_assert(Layout<Int64>::Alignment() == 8, "");
-  static_assert(Layout<Aligned<int8_t, 64>>::Alignment() == 64, "");
-  static_assert(Layout<int8_t, int32_t, Int64>::Alignment() == 8, "");
-  static_assert(Layout<int8_t, Int64, int32_t>::Alignment() == 8, "");
-  static_assert(Layout<int32_t, int8_t, Int64>::Alignment() == 8, "");
-  static_assert(Layout<int32_t, Int64, int8_t>::Alignment() == 8, "");
-  static_assert(Layout<Int64, int8_t, int32_t>::Alignment() == 8, "");
-  static_assert(Layout<Int64, int32_t, int8_t>::Alignment() == 8, "");
-}
-
-TEST(Layout, ConstexprPartial) {
-  constexpr size_t M = alignof(max_align_t);
-  constexpr Layout<unsigned char, Aligned<unsigned char, 2 * M>> x(1, 3);
-  static_assert(x.Partial(1).template Offset<1>() == 2 * M, "");
-}
-// [from, to)
-struct Region {
-  size_t from;
-  size_t to;
-};
-
-void ExpectRegionPoisoned(const unsigned char* p, size_t n, bool poisoned) {
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-  for (size_t i = 0; i != n; ++i) {
-    EXPECT_EQ(poisoned, __asan_address_is_poisoned(p + i));
-  }
-#endif
-}
-
-template <size_t N>
-void ExpectPoisoned(const unsigned char (&buf)[N],
-                    std::initializer_list<Region> reg) {
-  size_t prev = 0;
-  for (const Region& r : reg) {
-    ExpectRegionPoisoned(buf + prev, r.from - prev, false);
-    ExpectRegionPoisoned(buf + r.from, r.to - r.from, true);
-    prev = r.to;
-  }
-  ExpectRegionPoisoned(buf + prev, N - prev, false);
-}
-
-TEST(Layout, PoisonPadding) {
-  using L = Layout<int8_t, Int64, int32_t, Int128>;
-
-  constexpr size_t n = L::Partial(1, 2, 3, 4).AllocSize();
-  {
-    constexpr auto x = L::Partial();
-    alignas(max_align_t) const unsigned char c[n] = {};
-    x.PoisonPadding(c);
-    EXPECT_EQ(x.Slices(c), x.Slices(c));
-    ExpectPoisoned(c, {});
-  }
-  {
-    constexpr auto x = L::Partial(1);
-    alignas(max_align_t) const unsigned char c[n] = {};
-    x.PoisonPadding(c);
-    EXPECT_EQ(x.Slices(c), x.Slices(c));
-    ExpectPoisoned(c, {{1, 8}});
-  }
-  {
-    constexpr auto x = L::Partial(1, 2);
-    alignas(max_align_t) const unsigned char c[n] = {};
-    x.PoisonPadding(c);
-    EXPECT_EQ(x.Slices(c), x.Slices(c));
-    ExpectPoisoned(c, {{1, 8}});
-  }
-  {
-    constexpr auto x = L::Partial(1, 2, 3);
-    alignas(max_align_t) const unsigned char c[n] = {};
-    x.PoisonPadding(c);
-    EXPECT_EQ(x.Slices(c), x.Slices(c));
-    ExpectPoisoned(c, {{1, 8}, {36, 40}});
-  }
-  {
-    constexpr auto x = L::Partial(1, 2, 3, 4);
-    alignas(max_align_t) const unsigned char c[n] = {};
-    x.PoisonPadding(c);
-    EXPECT_EQ(x.Slices(c), x.Slices(c));
-    ExpectPoisoned(c, {{1, 8}, {36, 40}});
-  }
-  {
-    constexpr L x(1, 2, 3, 4);
-    alignas(max_align_t) const unsigned char c[n] = {};
-    x.PoisonPadding(c);
-    EXPECT_EQ(x.Slices(c), x.Slices(c));
-    ExpectPoisoned(c, {{1, 8}, {36, 40}});
-  }
-}
-
-TEST(Layout, DebugString) {
-  {
-    constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial();
-    EXPECT_EQ("@0<signed char>(1)", x.DebugString());
-  }
-  {
-    constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial(1);
-    EXPECT_EQ("@0<signed char>(1)[1]; @4<int>(4)", x.DebugString());
-  }
-  {
-    constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial(1, 2);
-    EXPECT_EQ("@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)",
-              x.DebugString());
-  }
-  {
-    constexpr auto x =
-        Layout<int8_t, int32_t, int8_t, Int128>::Partial(1, 2, 3);
-    EXPECT_EQ(
-        "@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)[3]; "
-        "@16" +
-            Int128::Name() + "(16)",
-        x.DebugString());
-  }
-  {
-    constexpr auto x =
-        Layout<int8_t, int32_t, int8_t, Int128>::Partial(1, 2, 3, 4);
-    EXPECT_EQ(
-        "@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)[3]; "
-        "@16" +
-            Int128::Name() + "(16)[4]",
-        x.DebugString());
-  }
-  {
-    constexpr Layout<int8_t, int32_t, int8_t, Int128> x(1, 2, 3, 4);
-    EXPECT_EQ(
-        "@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)[3]; "
-        "@16" +
-            Int128::Name() + "(16)[4]",
-        x.DebugString());
-  }
-}
-
-TEST(Layout, CharTypes) {
-  constexpr Layout<int32_t> x(1);
-  alignas(max_align_t) char c[x.AllocSize()] = {};
-  alignas(max_align_t) unsigned char uc[x.AllocSize()] = {};
-  alignas(max_align_t) signed char sc[x.AllocSize()] = {};
-  alignas(max_align_t) const char cc[x.AllocSize()] = {};
-  alignas(max_align_t) const unsigned char cuc[x.AllocSize()] = {};
-  alignas(max_align_t) const signed char csc[x.AllocSize()] = {};
-
-  Type<int32_t*>(x.Pointer<0>(c));
-  Type<int32_t*>(x.Pointer<0>(uc));
-  Type<int32_t*>(x.Pointer<0>(sc));
-  Type<const int32_t*>(x.Pointer<0>(cc));
-  Type<const int32_t*>(x.Pointer<0>(cuc));
-  Type<const int32_t*>(x.Pointer<0>(csc));
-
-  Type<int32_t*>(x.Pointer<int32_t>(c));
-  Type<int32_t*>(x.Pointer<int32_t>(uc));
-  Type<int32_t*>(x.Pointer<int32_t>(sc));
-  Type<const int32_t*>(x.Pointer<int32_t>(cc));
-  Type<const int32_t*>(x.Pointer<int32_t>(cuc));
-  Type<const int32_t*>(x.Pointer<int32_t>(csc));
-
-  Type<std::tuple<int32_t*>>(x.Pointers(c));
-  Type<std::tuple<int32_t*>>(x.Pointers(uc));
-  Type<std::tuple<int32_t*>>(x.Pointers(sc));
-  Type<std::tuple<const int32_t*>>(x.Pointers(cc));
-  Type<std::tuple<const int32_t*>>(x.Pointers(cuc));
-  Type<std::tuple<const int32_t*>>(x.Pointers(csc));
-
-  Type<Span<int32_t>>(x.Slice<0>(c));
-  Type<Span<int32_t>>(x.Slice<0>(uc));
-  Type<Span<int32_t>>(x.Slice<0>(sc));
-  Type<Span<const int32_t>>(x.Slice<0>(cc));
-  Type<Span<const int32_t>>(x.Slice<0>(cuc));
-  Type<Span<const int32_t>>(x.Slice<0>(csc));
-
-  Type<std::tuple<Span<int32_t>>>(x.Slices(c));
-  Type<std::tuple<Span<int32_t>>>(x.Slices(uc));
-  Type<std::tuple<Span<int32_t>>>(x.Slices(sc));
-  Type<std::tuple<Span<const int32_t>>>(x.Slices(cc));
-  Type<std::tuple<Span<const int32_t>>>(x.Slices(cuc));
-  Type<std::tuple<Span<const int32_t>>>(x.Slices(csc));
-}
-
-TEST(Layout, ConstElementType) {
-  constexpr Layout<const int32_t> x(1);
-  alignas(int32_t) char c[x.AllocSize()] = {};
-  const char* cc = c;
-  const int32_t* p = reinterpret_cast<const int32_t*>(cc);
-
-  EXPECT_EQ(alignof(int32_t), x.Alignment());
-
-  EXPECT_EQ(0, x.Offset<0>());
-  EXPECT_EQ(0, x.Offset<const int32_t>());
-
-  EXPECT_THAT(x.Offsets(), ElementsAre(0));
-
-  EXPECT_EQ(1, x.Size<0>());
-  EXPECT_EQ(1, x.Size<const int32_t>());
-
-  EXPECT_THAT(x.Sizes(), ElementsAre(1));
-
-  EXPECT_EQ(sizeof(int32_t), x.AllocSize());
-
-  EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<0>(c)));
-  EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<0>(cc)));
-
-  EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<const int32_t>(c)));
-  EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<const int32_t>(cc)));
-
-  EXPECT_THAT(Type<std::tuple<const int32_t*>>(x.Pointers(c)), Tuple(p));
-  EXPECT_THAT(Type<std::tuple<const int32_t*>>(x.Pointers(cc)), Tuple(p));
-
-  EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<0>(c)),
-              IsSameSlice(Span<const int32_t>(p, 1)));
-  EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<0>(cc)),
-              IsSameSlice(Span<const int32_t>(p, 1)));
-
-  EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<const int32_t>(c)),
-              IsSameSlice(Span<const int32_t>(p, 1)));
-  EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<const int32_t>(cc)),
-              IsSameSlice(Span<const int32_t>(p, 1)));
-
-  EXPECT_THAT(Type<std::tuple<Span<const int32_t>>>(x.Slices(c)),
-              Tuple(IsSameSlice(Span<const int32_t>(p, 1))));
-  EXPECT_THAT(Type<std::tuple<Span<const int32_t>>>(x.Slices(cc)),
-              Tuple(IsSameSlice(Span<const int32_t>(p, 1))));
-}
-
-namespace example {
-
-// Immutable move-only string with sizeof equal to sizeof(void*). The string
-// size and the characters are kept in the same heap allocation.
-class CompactString {
- public:
-  CompactString(const char* s = "") {  // NOLINT
-    const size_t size = strlen(s);
-    // size_t[1], followed by char[size + 1].
-    // This statement doesn't allocate memory.
-    const L layout(1, size + 1);
-    // AllocSize() tells us how much memory we need to allocate for all our
-    // data.
-    p_.reset(new unsigned char[layout.AllocSize()]);
-    // If running under ASAN, mark the padding bytes, if any, to catch memory
-    // errors.
-    layout.PoisonPadding(p_.get());
-    // Store the size in the allocation.
-    // Pointer<size_t>() is a synonym for Pointer<0>().
-    *layout.Pointer<size_t>(p_.get()) = size;
-    // Store the characters in the allocation.
-    memcpy(layout.Pointer<char>(p_.get()), s, size + 1);
-  }
-
-  size_t size() const {
-    // Equivalent to reinterpret_cast<size_t&>(*p).
-    return *L::Partial().Pointer<size_t>(p_.get());
-  }
-
-  const char* c_str() const {
-    // Equivalent to reinterpret_cast<char*>(p.get() + sizeof(size_t)).
-    // The argument in Partial(1) specifies that we have size_t[1] in front of
-    // the characters.
-    return L::Partial(1).Pointer<char>(p_.get());
-  }
-
- private:
-  // Our heap allocation contains a size_t followed by an array of chars.
-  using L = Layout<size_t, char>;
-  std::unique_ptr<unsigned char[]> p_;
-};
-
-TEST(CompactString, Works) {
-  CompactString s = "hello";
-  EXPECT_EQ(5, s.size());
-  EXPECT_STREQ("hello", s.c_str());
-}
-
-}  // namespace example
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/node_hash_policy.h b/third_party/abseil/absl/container/internal/node_hash_policy.h
deleted file mode 100644
index 4617162..0000000
--- a/third_party/abseil/absl/container/internal/node_hash_policy.h
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Adapts a policy for nodes.
-//
-// The node policy should model:
-//
-// struct Policy {
-//   // Returns a new node allocated and constructed using the allocator, using
-//   // the specified arguments.
-//   template <class Alloc, class... Args>
-//   value_type* new_element(Alloc* alloc, Args&&... args) const;
-//
-//   // Destroys and deallocates node using the allocator.
-//   template <class Alloc>
-//   void delete_element(Alloc* alloc, value_type* node) const;
-// };
-//
-// It may also optionally define `value()` and `apply()`. For documentation on
-// these, see hash_policy_traits.h.
-
-#ifndef ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_
-#define ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_
-
-#include <cassert>
-#include <cstddef>
-#include <memory>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class Reference, class Policy>
-struct node_hash_policy {
-  static_assert(std::is_lvalue_reference<Reference>::value, "");
-
-  using slot_type = typename std::remove_cv<
-      typename std::remove_reference<Reference>::type>::type*;
-
-  template <class Alloc, class... Args>
-  static void construct(Alloc* alloc, slot_type* slot, Args&&... args) {
-    *slot = Policy::new_element(alloc, std::forward<Args>(args)...);
-  }
-
-  template <class Alloc>
-  static void destroy(Alloc* alloc, slot_type* slot) {
-    Policy::delete_element(alloc, *slot);
-  }
-
-  template <class Alloc>
-  static void transfer(Alloc*, slot_type* new_slot, slot_type* old_slot) {
-    *new_slot = *old_slot;
-  }
-
-  static size_t space_used(const slot_type* slot) {
-    if (slot == nullptr) return Policy::element_space_used(nullptr);
-    return Policy::element_space_used(*slot);
-  }
-
-  static Reference element(slot_type* slot) { return **slot; }
-
-  template <class T, class P = Policy>
-  static auto value(T* elem) -> decltype(P::value(elem)) {
-    return P::value(elem);
-  }
-
-  template <class... Ts, class P = Policy>
-  static auto apply(Ts&&... ts) -> decltype(P::apply(std::forward<Ts>(ts)...)) {
-    return P::apply(std::forward<Ts>(ts)...);
-  }
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_
diff --git a/third_party/abseil/absl/container/internal/node_hash_policy_test.cc b/third_party/abseil/absl/container/internal/node_hash_policy_test.cc
deleted file mode 100644
index 84aabba..0000000
--- a/third_party/abseil/absl/container/internal/node_hash_policy_test.cc
+++ /dev/null
@@ -1,69 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/node_hash_policy.h"
-
-#include <memory>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_policy_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::testing::Pointee;
-
-struct Policy : node_hash_policy<int&, Policy> {
-  using key_type = int;
-  using init_type = int;
-
-  template <class Alloc>
-  static int* new_element(Alloc* alloc, int value) {
-    return new int(value);
-  }
-
-  template <class Alloc>
-  static void delete_element(Alloc* alloc, int* elem) {
-    delete elem;
-  }
-};
-
-using NodePolicy = hash_policy_traits<Policy>;
-
-struct NodeTest : ::testing::Test {
-  std::allocator<int> alloc;
-  int n = 53;
-  int* a = &n;
-};
-
-TEST_F(NodeTest, ConstructDestroy) {
-  NodePolicy::construct(&alloc, &a, 42);
-  EXPECT_THAT(a, Pointee(42));
-  NodePolicy::destroy(&alloc, &a);
-}
-
-TEST_F(NodeTest, transfer) {
-  int s = 42;
-  int* b = &s;
-  NodePolicy::transfer(&alloc, &a, &b);
-  EXPECT_EQ(&s, a);
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/raw_hash_map.h b/third_party/abseil/absl/container/internal/raw_hash_map.h
deleted file mode 100644
index 0a02757..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_map.h
+++ /dev/null
@@ -1,197 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_RAW_HASH_MAP_H_
-#define ABSL_CONTAINER_INTERNAL_RAW_HASH_MAP_H_
-
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/raw_hash_set.h"  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class Policy, class Hash, class Eq, class Alloc>
-class raw_hash_map : public raw_hash_set<Policy, Hash, Eq, Alloc> {
-  // P is Policy. It's passed as a template argument to support maps that have
-  // incomplete types as values, as in unordered_map<K, IncompleteType>.
-  // MappedReference<> may be a non-reference type.
-  template <class P>
-  using MappedReference = decltype(P::value(
-      std::addressof(std::declval<typename raw_hash_map::reference>())));
-
-  // MappedConstReference<> may be a non-reference type.
-  template <class P>
-  using MappedConstReference = decltype(P::value(
-      std::addressof(std::declval<typename raw_hash_map::const_reference>())));
-
-  using KeyArgImpl =
-      KeyArg<IsTransparent<Eq>::value && IsTransparent<Hash>::value>;
-
- public:
-  using key_type = typename Policy::key_type;
-  using mapped_type = typename Policy::mapped_type;
-  template <class K>
-  using key_arg = typename KeyArgImpl::template type<K, key_type>;
-
-  static_assert(!std::is_reference<key_type>::value, "");
-  // TODO(alkis): remove this assertion and verify that reference mapped_type is
-  // supported.
-  static_assert(!std::is_reference<mapped_type>::value, "");
-
-  using iterator = typename raw_hash_map::raw_hash_set::iterator;
-  using const_iterator = typename raw_hash_map::raw_hash_set::const_iterator;
-
-  raw_hash_map() {}
-  using raw_hash_map::raw_hash_set::raw_hash_set;
-
-  // The last two template parameters ensure that both arguments are rvalues
-  // (lvalue arguments are handled by the overloads below). This is necessary
-  // for supporting bitfield arguments.
-  //
-  //   union { int n : 1; };
-  //   flat_hash_map<int, int> m;
-  //   m.insert_or_assign(n, n);
-  template <class K = key_type, class V = mapped_type, K* = nullptr,
-            V* = nullptr>
-  std::pair<iterator, bool> insert_or_assign(key_arg<K>&& k, V&& v) {
-    return insert_or_assign_impl(std::forward<K>(k), std::forward<V>(v));
-  }
-
-  template <class K = key_type, class V = mapped_type, K* = nullptr>
-  std::pair<iterator, bool> insert_or_assign(key_arg<K>&& k, const V& v) {
-    return insert_or_assign_impl(std::forward<K>(k), v);
-  }
-
-  template <class K = key_type, class V = mapped_type, V* = nullptr>
-  std::pair<iterator, bool> insert_or_assign(const key_arg<K>& k, V&& v) {
-    return insert_or_assign_impl(k, std::forward<V>(v));
-  }
-
-  template <class K = key_type, class V = mapped_type>
-  std::pair<iterator, bool> insert_or_assign(const key_arg<K>& k, const V& v) {
-    return insert_or_assign_impl(k, v);
-  }
-
-  template <class K = key_type, class V = mapped_type, K* = nullptr,
-            V* = nullptr>
-  iterator insert_or_assign(const_iterator, key_arg<K>&& k, V&& v) {
-    return insert_or_assign(std::forward<K>(k), std::forward<V>(v)).first;
-  }
-
-  template <class K = key_type, class V = mapped_type, K* = nullptr>
-  iterator insert_or_assign(const_iterator, key_arg<K>&& k, const V& v) {
-    return insert_or_assign(std::forward<K>(k), v).first;
-  }
-
-  template <class K = key_type, class V = mapped_type, V* = nullptr>
-  iterator insert_or_assign(const_iterator, const key_arg<K>& k, V&& v) {
-    return insert_or_assign(k, std::forward<V>(v)).first;
-  }
-
-  template <class K = key_type, class V = mapped_type>
-  iterator insert_or_assign(const_iterator, const key_arg<K>& k, const V& v) {
-    return insert_or_assign(k, v).first;
-  }
-
-  // All `try_emplace()` overloads make the same guarantees regarding rvalue
-  // arguments as `std::unordered_map::try_emplace()`, namely that these
-  // functions will not move from rvalue arguments if insertions do not happen.
-  template <class K = key_type, class... Args,
-            typename std::enable_if<
-                !std::is_convertible<K, const_iterator>::value, int>::type = 0,
-            K* = nullptr>
-  std::pair<iterator, bool> try_emplace(key_arg<K>&& k, Args&&... args) {
-    return try_emplace_impl(std::forward<K>(k), std::forward<Args>(args)...);
-  }
-
-  template <class K = key_type, class... Args,
-            typename std::enable_if<
-                !std::is_convertible<K, const_iterator>::value, int>::type = 0>
-  std::pair<iterator, bool> try_emplace(const key_arg<K>& k, Args&&... args) {
-    return try_emplace_impl(k, std::forward<Args>(args)...);
-  }
-
-  template <class K = key_type, class... Args, K* = nullptr>
-  iterator try_emplace(const_iterator, key_arg<K>&& k, Args&&... args) {
-    return try_emplace(std::forward<K>(k), std::forward<Args>(args)...).first;
-  }
-
-  template <class K = key_type, class... Args>
-  iterator try_emplace(const_iterator, const key_arg<K>& k, Args&&... args) {
-    return try_emplace(k, std::forward<Args>(args)...).first;
-  }
-
-  template <class K = key_type, class P = Policy>
-  MappedReference<P> at(const key_arg<K>& key) {
-    auto it = this->find(key);
-    if (it == this->end()) {
-      base_internal::ThrowStdOutOfRange(
-          "absl::container_internal::raw_hash_map<>::at");
-    }
-    return Policy::value(&*it);
-  }
-
-  template <class K = key_type, class P = Policy>
-  MappedConstReference<P> at(const key_arg<K>& key) const {
-    auto it = this->find(key);
-    if (it == this->end()) {
-      base_internal::ThrowStdOutOfRange(
-          "absl::container_internal::raw_hash_map<>::at");
-    }
-    return Policy::value(&*it);
-  }
-
-  template <class K = key_type, class P = Policy, K* = nullptr>
-  MappedReference<P> operator[](key_arg<K>&& key) {
-    return Policy::value(&*try_emplace(std::forward<K>(key)).first);
-  }
-
-  template <class K = key_type, class P = Policy>
-  MappedReference<P> operator[](const key_arg<K>& key) {
-    return Policy::value(&*try_emplace(key).first);
-  }
-
- private:
-  template <class K, class V>
-  std::pair<iterator, bool> insert_or_assign_impl(K&& k, V&& v) {
-    auto res = this->find_or_prepare_insert(k);
-    if (res.second)
-      this->emplace_at(res.first, std::forward<K>(k), std::forward<V>(v));
-    else
-      Policy::value(&*this->iterator_at(res.first)) = std::forward<V>(v);
-    return {this->iterator_at(res.first), res.second};
-  }
-
-  template <class K = key_type, class... Args>
-  std::pair<iterator, bool> try_emplace_impl(K&& k, Args&&... args) {
-    auto res = this->find_or_prepare_insert(k);
-    if (res.second)
-      this->emplace_at(res.first, std::piecewise_construct,
-                       std::forward_as_tuple(std::forward<K>(k)),
-                       std::forward_as_tuple(std::forward<Args>(args)...));
-    return {this->iterator_at(res.first), res.second};
-  }
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_RAW_HASH_MAP_H_
diff --git a/third_party/abseil/absl/container/internal/raw_hash_set.cc b/third_party/abseil/absl/container/internal/raw_hash_set.cc
deleted file mode 100644
index bfef071..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_set.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/raw_hash_set.h"
-
-#include <atomic>
-#include <cstddef>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-constexpr size_t Group::kWidth;
-
-// Returns "random" seed.
-inline size_t RandomSeed() {
-#ifdef ABSL_HAVE_THREAD_LOCAL
-  static thread_local size_t counter = 0;
-  size_t value = ++counter;
-#else   // ABSL_HAVE_THREAD_LOCAL
-  static std::atomic<size_t> counter(0);
-  size_t value = counter.fetch_add(1, std::memory_order_relaxed);
-#endif  // ABSL_HAVE_THREAD_LOCAL
-  return value ^ static_cast<size_t>(reinterpret_cast<uintptr_t>(&counter));
-}
-
-bool ShouldInsertBackwards(size_t hash, ctrl_t* ctrl) {
-  // To avoid problems with weak hashes and single bit tests, we use % 13.
-  // TODO(kfm,sbenza): revisit after we do unconditional mixing
-  return (H1(hash, ctrl) ^ RandomSeed()) % 13 > 6;
-}
-
-void ConvertDeletedToEmptyAndFullToDeleted(
-    ctrl_t* ctrl, size_t capacity) {
-  assert(ctrl[capacity] == kSentinel);
-  assert(IsValidCapacity(capacity));
-  for (ctrl_t* pos = ctrl; pos != ctrl + capacity + 1; pos += Group::kWidth) {
-    Group{pos}.ConvertSpecialToEmptyAndFullToDeleted(pos);
-  }
-  // Copy the cloned ctrl bytes.
-  std::memcpy(ctrl + capacity + 1, ctrl, Group::kWidth);
-  ctrl[capacity] = kSentinel;
-}
-
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/raw_hash_set.h b/third_party/abseil/absl/container/internal/raw_hash_set.h
deleted file mode 100644
index 74b2ef4..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_set.h
+++ /dev/null
@@ -1,1892 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// An open-addressing
-// hashtable with quadratic probing.
-//
-// This is a low level hashtable on top of which different interfaces can be
-// implemented, like flat_hash_set, node_hash_set, string_hash_set, etc.
-//
-// The table interface is similar to that of std::unordered_set. Notable
-// differences are that most member functions support heterogeneous keys when
-// BOTH the hash and eq functions are marked as transparent. They do so by
-// providing a typedef called `is_transparent`.
-//
-// When heterogeneous lookup is enabled, functions that take key_type act as if
-// they have an overload set like:
-//
-//   iterator find(const key_type& key);
-//   template <class K>
-//   iterator find(const K& key);
-//
-//   size_type erase(const key_type& key);
-//   template <class K>
-//   size_type erase(const K& key);
-//
-//   std::pair<iterator, iterator> equal_range(const key_type& key);
-//   template <class K>
-//   std::pair<iterator, iterator> equal_range(const K& key);
-//
-// When heterogeneous lookup is disabled, only the explicit `key_type` overloads
-// exist.
-//
-// find() also supports passing the hash explicitly:
-//
-//   iterator find(const key_type& key, size_t hash);
-//   template <class U>
-//   iterator find(const U& key, size_t hash);
-//
-// In addition the pointer to element and iterator stability guarantees are
-// weaker: all iterators and pointers are invalidated after a new element is
-// inserted.
-//
-// IMPLEMENTATION DETAILS
-//
-// The table stores elements inline in a slot array. In addition to the slot
-// array the table maintains some control state per slot. The extra state is one
-// byte per slot and stores empty or deleted marks, or alternatively 7 bits from
-// the hash of an occupied slot. The table is split into logical groups of
-// slots, like so:
-//
-//      Group 1         Group 2        Group 3
-// +---------------+---------------+---------------+
-// | | | | | | | | | | | | | | | | | | | | | | | | |
-// +---------------+---------------+---------------+
-//
-// On lookup the hash is split into two parts:
-// - H2: 7 bits (those stored in the control bytes)
-// - H1: the rest of the bits
-// The groups are probed using H1. For each group the slots are matched to H2 in
-// parallel. Because H2 is 7 bits (128 states) and the number of slots per group
-// is low (8 or 16) in almost all cases a match in H2 is also a lookup hit.
-//
-// On insert, once the right group is found (as in lookup), its slots are
-// filled in order.
-//
-// On erase a slot is cleared. In case the group did not have any empty slots
-// before the erase, the erased slot is marked as deleted.
-//
-// Groups without empty slots (but maybe with deleted slots) extend the probe
-// sequence. The probing algorithm is quadratic. Given N the number of groups,
-// the probing function for the i'th probe is:
-//
-//   P(0) = H1 % N
-//
-//   P(i) = (P(i - 1) + i) % N
-//
-// This probing function guarantees that after N probes, all the groups of the
-// table will be probed exactly once.
-
-#ifndef ABSL_CONTAINER_INTERNAL_RAW_HASH_SET_H_
-#define ABSL_CONTAINER_INTERNAL_RAW_HASH_SET_H_
-
-#include <algorithm>
-#include <cmath>
-#include <cstdint>
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/endian.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-#include "absl/container/internal/common.h"
-#include "absl/container/internal/compressed_tuple.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/hash_policy_traits.h"
-#include "absl/container/internal/hashtable_debug_hooks.h"
-#include "absl/container/internal/hashtablez_sampler.h"
-#include "absl/container/internal/have_sse.h"
-#include "absl/container/internal/layout.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/bits.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <typename AllocType>
-void SwapAlloc(AllocType& lhs, AllocType& rhs,
-               std::true_type /* propagate_on_container_swap */) {
-  using std::swap;
-  swap(lhs, rhs);
-}
-template <typename AllocType>
-void SwapAlloc(AllocType& /*lhs*/, AllocType& /*rhs*/,
-               std::false_type /* propagate_on_container_swap */) {}
-
-template <size_t Width>
-class probe_seq {
- public:
-  probe_seq(size_t hash, size_t mask) {
-    assert(((mask + 1) & mask) == 0 && "not a mask");
-    mask_ = mask;
-    offset_ = hash & mask_;
-  }
-  size_t offset() const { return offset_; }
-  size_t offset(size_t i) const { return (offset_ + i) & mask_; }
-
-  void next() {
-    index_ += Width;
-    offset_ += index_;
-    offset_ &= mask_;
-  }
-  // 0-based probe index. The i-th probe in the probe sequence.
-  size_t index() const { return index_; }
-
- private:
-  size_t mask_;
-  size_t offset_;
-  size_t index_ = 0;
-};
-
-template <class ContainerKey, class Hash, class Eq>
-struct RequireUsableKey {
-  template <class PassedKey, class... Args>
-  std::pair<
-      decltype(std::declval<const Hash&>()(std::declval<const PassedKey&>())),
-      decltype(std::declval<const Eq&>()(std::declval<const ContainerKey&>(),
-                                         std::declval<const PassedKey&>()))>*
-  operator()(const PassedKey&, const Args&...) const;
-};
-
-template <class E, class Policy, class Hash, class Eq, class... Ts>
-struct IsDecomposable : std::false_type {};
-
-template <class Policy, class Hash, class Eq, class... Ts>
-struct IsDecomposable<
-    absl::void_t<decltype(
-        Policy::apply(RequireUsableKey<typename Policy::key_type, Hash, Eq>(),
-                      std::declval<Ts>()...))>,
-    Policy, Hash, Eq, Ts...> : std::true_type {};
-
-// TODO(alkis): Switch to std::is_nothrow_swappable when gcc/clang supports it.
-template <class T>
-constexpr bool IsNoThrowSwappable(std::true_type = {} /* is_swappable */) {
-  using std::swap;
-  return noexcept(swap(std::declval<T&>(), std::declval<T&>()));
-}
-template <class T>
-constexpr bool IsNoThrowSwappable(std::false_type /* is_swappable */) {
-  return false;
-}
-
-template <typename T>
-uint32_t TrailingZeros(T x) {
-  ABSL_INTERNAL_ASSUME(x != 0);
-  return countr_zero(x);
-}
-
-// An abstraction over a bitmask. It provides an easy way to iterate through the
-// indexes of the set bits of a bitmask.  When Shift=0 (platforms with SSE),
-// this is a true bitmask.  On non-SSE, platforms the arithematic used to
-// emulate the SSE behavior works in bytes (Shift=3) and leaves each bytes as
-// either 0x00 or 0x80.
-//
-// For example:
-//   for (int i : BitMask<uint32_t, 16>(0x5)) -> yields 0, 2
-//   for (int i : BitMask<uint64_t, 8, 3>(0x0000000080800000)) -> yields 2, 3
-template <class T, int SignificantBits, int Shift = 0>
-class BitMask {
-  static_assert(std::is_unsigned<T>::value, "");
-  static_assert(Shift == 0 || Shift == 3, "");
-
- public:
-  // These are useful for unit tests (gunit).
-  using value_type = int;
-  using iterator = BitMask;
-  using const_iterator = BitMask;
-
-  explicit BitMask(T mask) : mask_(mask) {}
-  BitMask& operator++() {
-    mask_ &= (mask_ - 1);
-    return *this;
-  }
-  explicit operator bool() const { return mask_ != 0; }
-  int operator*() const { return LowestBitSet(); }
-  uint32_t LowestBitSet() const {
-    return container_internal::TrailingZeros(mask_) >> Shift;
-  }
-  uint32_t HighestBitSet() const {
-    return static_cast<uint32_t>((bit_width(mask_) - 1) >> Shift);
-  }
-
-  BitMask begin() const { return *this; }
-  BitMask end() const { return BitMask(0); }
-
-  uint32_t TrailingZeros() const {
-    return container_internal::TrailingZeros(mask_) >> Shift;
-  }
-
-  uint32_t LeadingZeros() const {
-    constexpr int total_significant_bits = SignificantBits << Shift;
-    constexpr int extra_bits = sizeof(T) * 8 - total_significant_bits;
-    return countl_zero(mask_ << extra_bits) >> Shift;
-  }
-
- private:
-  friend bool operator==(const BitMask& a, const BitMask& b) {
-    return a.mask_ == b.mask_;
-  }
-  friend bool operator!=(const BitMask& a, const BitMask& b) {
-    return a.mask_ != b.mask_;
-  }
-
-  T mask_;
-};
-
-using ctrl_t = signed char;
-using h2_t = uint8_t;
-
-// The values here are selected for maximum performance. See the static asserts
-// below for details.
-enum Ctrl : ctrl_t {
-  kEmpty = -128,   // 0b10000000
-  kDeleted = -2,   // 0b11111110
-  kSentinel = -1,  // 0b11111111
-};
-static_assert(
-    kEmpty & kDeleted & kSentinel & 0x80,
-    "Special markers need to have the MSB to make checking for them efficient");
-static_assert(kEmpty < kSentinel && kDeleted < kSentinel,
-              "kEmpty and kDeleted must be smaller than kSentinel to make the "
-              "SIMD test of IsEmptyOrDeleted() efficient");
-static_assert(kSentinel == -1,
-              "kSentinel must be -1 to elide loading it from memory into SIMD "
-              "registers (pcmpeqd xmm, xmm)");
-static_assert(kEmpty == -128,
-              "kEmpty must be -128 to make the SIMD check for its "
-              "existence efficient (psignb xmm, xmm)");
-static_assert(~kEmpty & ~kDeleted & kSentinel & 0x7F,
-              "kEmpty and kDeleted must share an unset bit that is not shared "
-              "by kSentinel to make the scalar test for MatchEmptyOrDeleted() "
-              "efficient");
-static_assert(kDeleted == -2,
-              "kDeleted must be -2 to make the implementation of "
-              "ConvertSpecialToEmptyAndFullToDeleted efficient");
-
-// A single block of empty control bytes for tables without any slots allocated.
-// This enables removing a branch in the hot path of find().
-inline ctrl_t* EmptyGroup() {
-  alignas(16) static constexpr ctrl_t empty_group[] = {
-      kSentinel, kEmpty, kEmpty, kEmpty, kEmpty, kEmpty, kEmpty, kEmpty,
-      kEmpty,    kEmpty, kEmpty, kEmpty, kEmpty, kEmpty, kEmpty, kEmpty};
-  return const_cast<ctrl_t*>(empty_group);
-}
-
-// Mixes a randomly generated per-process seed with `hash` and `ctrl` to
-// randomize insertion order within groups.
-bool ShouldInsertBackwards(size_t hash, ctrl_t* ctrl);
-
-// Returns a hash seed.
-//
-// The seed consists of the ctrl_ pointer, which adds enough entropy to ensure
-// non-determinism of iteration order in most cases.
-inline size_t HashSeed(const ctrl_t* ctrl) {
-  // The low bits of the pointer have little or no entropy because of
-  // alignment. We shift the pointer to try to use higher entropy bits. A
-  // good number seems to be 12 bits, because that aligns with page size.
-  return reinterpret_cast<uintptr_t>(ctrl) >> 12;
-}
-
-inline size_t H1(size_t hash, const ctrl_t* ctrl) {
-  return (hash >> 7) ^ HashSeed(ctrl);
-}
-inline ctrl_t H2(size_t hash) { return hash & 0x7F; }
-
-inline bool IsEmpty(ctrl_t c) { return c == kEmpty; }
-inline bool IsFull(ctrl_t c) { return c >= 0; }
-inline bool IsDeleted(ctrl_t c) { return c == kDeleted; }
-inline bool IsEmptyOrDeleted(ctrl_t c) { return c < kSentinel; }
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-
-// https://github.com/abseil/abseil-cpp/issues/209
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87853
-// _mm_cmpgt_epi8 is broken under GCC with -funsigned-char
-// Work around this by using the portable implementation of Group
-// when using -funsigned-char under GCC.
-inline __m128i _mm_cmpgt_epi8_fixed(__m128i a, __m128i b) {
-#if defined(__GNUC__) && !defined(__clang__)
-  if (std::is_unsigned<char>::value) {
-    const __m128i mask = _mm_set1_epi8(0x80);
-    const __m128i diff = _mm_subs_epi8(b, a);
-    return _mm_cmpeq_epi8(_mm_and_si128(diff, mask), mask);
-  }
-#endif
-  return _mm_cmpgt_epi8(a, b);
-}
-
-struct GroupSse2Impl {
-  static constexpr size_t kWidth = 16;  // the number of slots per group
-
-  explicit GroupSse2Impl(const ctrl_t* pos) {
-    ctrl = _mm_loadu_si128(reinterpret_cast<const __m128i*>(pos));
-  }
-
-  // Returns a bitmask representing the positions of slots that match hash.
-  BitMask<uint32_t, kWidth> Match(h2_t hash) const {
-    auto match = _mm_set1_epi8(hash);
-    return BitMask<uint32_t, kWidth>(
-        _mm_movemask_epi8(_mm_cmpeq_epi8(match, ctrl)));
-  }
-
-  // Returns a bitmask representing the positions of empty slots.
-  BitMask<uint32_t, kWidth> MatchEmpty() const {
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
-    // This only works because kEmpty is -128.
-    return BitMask<uint32_t, kWidth>(
-        _mm_movemask_epi8(_mm_sign_epi8(ctrl, ctrl)));
-#else
-    return Match(static_cast<h2_t>(kEmpty));
-#endif
-  }
-
-  // Returns a bitmask representing the positions of empty or deleted slots.
-  BitMask<uint32_t, kWidth> MatchEmptyOrDeleted() const {
-    auto special = _mm_set1_epi8(kSentinel);
-    return BitMask<uint32_t, kWidth>(
-        _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl)));
-  }
-
-  // Returns the number of trailing empty or deleted elements in the group.
-  uint32_t CountLeadingEmptyOrDeleted() const {
-    auto special = _mm_set1_epi8(kSentinel);
-    return TrailingZeros(static_cast<uint32_t>(
-        _mm_movemask_epi8(_mm_cmpgt_epi8_fixed(special, ctrl)) + 1));
-  }
-
-  void ConvertSpecialToEmptyAndFullToDeleted(ctrl_t* dst) const {
-    auto msbs = _mm_set1_epi8(static_cast<char>(-128));
-    auto x126 = _mm_set1_epi8(126);
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSSE3
-    auto res = _mm_or_si128(_mm_shuffle_epi8(x126, ctrl), msbs);
-#else
-    auto zero = _mm_setzero_si128();
-    auto special_mask = _mm_cmpgt_epi8_fixed(zero, ctrl);
-    auto res = _mm_or_si128(msbs, _mm_andnot_si128(special_mask, x126));
-#endif
-    _mm_storeu_si128(reinterpret_cast<__m128i*>(dst), res);
-  }
-
-  __m128i ctrl;
-};
-#endif  // ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-
-struct GroupPortableImpl {
-  static constexpr size_t kWidth = 8;
-
-  explicit GroupPortableImpl(const ctrl_t* pos)
-      : ctrl(little_endian::Load64(pos)) {}
-
-  BitMask<uint64_t, kWidth, 3> Match(h2_t hash) const {
-    // For the technique, see:
-    // http://graphics.stanford.edu/~seander/bithacks.html##ValueInWord
-    // (Determine if a word has a byte equal to n).
-    //
-    // Caveat: there are false positives but:
-    // - they only occur if there is a real match
-    // - they never occur on kEmpty, kDeleted, kSentinel
-    // - they will be handled gracefully by subsequent checks in code
-    //
-    // Example:
-    //   v = 0x1716151413121110
-    //   hash = 0x12
-    //   retval = (v - lsbs) & ~v & msbs = 0x0000000080800000
-    constexpr uint64_t msbs = 0x8080808080808080ULL;
-    constexpr uint64_t lsbs = 0x0101010101010101ULL;
-    auto x = ctrl ^ (lsbs * hash);
-    return BitMask<uint64_t, kWidth, 3>((x - lsbs) & ~x & msbs);
-  }
-
-  BitMask<uint64_t, kWidth, 3> MatchEmpty() const {
-    constexpr uint64_t msbs = 0x8080808080808080ULL;
-    return BitMask<uint64_t, kWidth, 3>((ctrl & (~ctrl << 6)) & msbs);
-  }
-
-  BitMask<uint64_t, kWidth, 3> MatchEmptyOrDeleted() const {
-    constexpr uint64_t msbs = 0x8080808080808080ULL;
-    return BitMask<uint64_t, kWidth, 3>((ctrl & (~ctrl << 7)) & msbs);
-  }
-
-  uint32_t CountLeadingEmptyOrDeleted() const {
-    constexpr uint64_t gaps = 0x00FEFEFEFEFEFEFEULL;
-    return (TrailingZeros(((~ctrl & (ctrl >> 7)) | gaps) + 1) + 7) >> 3;
-  }
-
-  void ConvertSpecialToEmptyAndFullToDeleted(ctrl_t* dst) const {
-    constexpr uint64_t msbs = 0x8080808080808080ULL;
-    constexpr uint64_t lsbs = 0x0101010101010101ULL;
-    auto x = ctrl & msbs;
-    auto res = (~x + (x >> 7)) & ~lsbs;
-    little_endian::Store64(dst, res);
-  }
-
-  uint64_t ctrl;
-};
-
-#if ABSL_INTERNAL_RAW_HASH_SET_HAVE_SSE2
-using Group = GroupSse2Impl;
-#else
-using Group = GroupPortableImpl;
-#endif
-
-template <class Policy, class Hash, class Eq, class Alloc>
-class raw_hash_set;
-
-inline bool IsValidCapacity(size_t n) { return ((n + 1) & n) == 0 && n > 0; }
-
-// PRECONDITION:
-//   IsValidCapacity(capacity)
-//   ctrl[capacity] == kSentinel
-//   ctrl[i] != kSentinel for all i < capacity
-// Applies mapping for every byte in ctrl:
-//   DELETED -> EMPTY
-//   EMPTY -> EMPTY
-//   FULL -> DELETED
-void ConvertDeletedToEmptyAndFullToDeleted(ctrl_t* ctrl, size_t capacity);
-
-// Rounds up the capacity to the next power of 2 minus 1, with a minimum of 1.
-inline size_t NormalizeCapacity(size_t n) {
-  return n ? ~size_t{} >> countl_zero(n) : 1;
-}
-
-// We use 7/8th as maximum load factor.
-// For 16-wide groups, that gives an average of two empty slots per group.
-inline size_t CapacityToGrowth(size_t capacity) {
-  assert(IsValidCapacity(capacity));
-  // `capacity*7/8`
-  if (Group::kWidth == 8 && capacity == 7) {
-    // x-x/8 does not work when x==7.
-    return 6;
-  }
-  return capacity - capacity / 8;
-}
-// From desired "growth" to a lowerbound of the necessary capacity.
-// Might not be a valid one and required NormalizeCapacity().
-inline size_t GrowthToLowerboundCapacity(size_t growth) {
-  // `growth*8/7`
-  if (Group::kWidth == 8 && growth == 7) {
-    // x+(x-1)/7 does not work when x==7.
-    return 8;
-  }
-  return growth + static_cast<size_t>((static_cast<int64_t>(growth) - 1) / 7);
-}
-
-inline void AssertIsFull(ctrl_t* ctrl) {
-  ABSL_HARDENING_ASSERT((ctrl != nullptr && IsFull(*ctrl)) &&
-                        "Invalid operation on iterator. The element might have "
-                        "been erased, or the table might have rehashed.");
-}
-
-inline void AssertIsValid(ctrl_t* ctrl) {
-  ABSL_HARDENING_ASSERT((ctrl == nullptr || IsFull(*ctrl)) &&
-                        "Invalid operation on iterator. The element might have "
-                        "been erased, or the table might have rehashed.");
-}
-
-struct FindInfo {
-  size_t offset;
-  size_t probe_length;
-};
-
-// The representation of the object has two modes:
-//  - small: For capacities < kWidth-1
-//  - large: For the rest.
-//
-// Differences:
-//  - In small mode we are able to use the whole capacity. The extra control
-//  bytes give us at least one "empty" control byte to stop the iteration.
-//  This is important to make 1 a valid capacity.
-//
-//  - In small mode only the first `capacity()` control bytes after the
-//  sentinel are valid. The rest contain dummy kEmpty values that do not
-//  represent a real slot. This is important to take into account on
-//  find_first_non_full(), where we never try ShouldInsertBackwards() for
-//  small tables.
-inline bool is_small(size_t capacity) { return capacity < Group::kWidth - 1; }
-
-inline probe_seq<Group::kWidth> probe(ctrl_t* ctrl, size_t hash,
-                                      size_t capacity) {
-  return probe_seq<Group::kWidth>(H1(hash, ctrl), capacity);
-}
-
-// Probes the raw_hash_set with the probe sequence for hash and returns the
-// pointer to the first empty or deleted slot.
-// NOTE: this function must work with tables having both kEmpty and kDelete
-// in one group. Such tables appears during drop_deletes_without_resize.
-//
-// This function is very useful when insertions happen and:
-// - the input is already a set
-// - there are enough slots
-// - the element with the hash is not in the table
-inline FindInfo find_first_non_full(ctrl_t* ctrl, size_t hash,
-                                    size_t capacity) {
-  auto seq = probe(ctrl, hash, capacity);
-  while (true) {
-    Group g{ctrl + seq.offset()};
-    auto mask = g.MatchEmptyOrDeleted();
-    if (mask) {
-#if !defined(NDEBUG)
-      // We want to add entropy even when ASLR is not enabled.
-      // In debug build we will randomly insert in either the front or back of
-      // the group.
-      // TODO(kfm,sbenza): revisit after we do unconditional mixing
-      if (!is_small(capacity) && ShouldInsertBackwards(hash, ctrl)) {
-        return {seq.offset(mask.HighestBitSet()), seq.index()};
-      }
-#endif
-      return {seq.offset(mask.LowestBitSet()), seq.index()};
-    }
-    seq.next();
-    assert(seq.index() < capacity && "full table!");
-  }
-}
-
-// Policy: a policy defines how to perform different operations on
-// the slots of the hashtable (see hash_policy_traits.h for the full interface
-// of policy).
-//
-// Hash: a (possibly polymorphic) functor that hashes keys of the hashtable. The
-// functor should accept a key and return size_t as hash. For best performance
-// it is important that the hash function provides high entropy across all bits
-// of the hash.
-//
-// Eq: a (possibly polymorphic) functor that compares two keys for equality. It
-// should accept two (of possibly different type) keys and return a bool: true
-// if they are equal, false if they are not. If two keys compare equal, then
-// their hash values as defined by Hash MUST be equal.
-//
-// Allocator: an Allocator
-// [https://en.cppreference.com/w/cpp/named_req/Allocator] with which
-// the storage of the hashtable will be allocated and the elements will be
-// constructed and destroyed.
-template <class Policy, class Hash, class Eq, class Alloc>
-class raw_hash_set {
-  using PolicyTraits = hash_policy_traits<Policy>;
-  using KeyArgImpl =
-      KeyArg<IsTransparent<Eq>::value && IsTransparent<Hash>::value>;
-
- public:
-  using init_type = typename PolicyTraits::init_type;
-  using key_type = typename PolicyTraits::key_type;
-  // TODO(sbenza): Hide slot_type as it is an implementation detail. Needs user
-  // code fixes!
-  using slot_type = typename PolicyTraits::slot_type;
-  using allocator_type = Alloc;
-  using size_type = size_t;
-  using difference_type = ptrdiff_t;
-  using hasher = Hash;
-  using key_equal = Eq;
-  using policy_type = Policy;
-  using value_type = typename PolicyTraits::value_type;
-  using reference = value_type&;
-  using const_reference = const value_type&;
-  using pointer = typename absl::allocator_traits<
-      allocator_type>::template rebind_traits<value_type>::pointer;
-  using const_pointer = typename absl::allocator_traits<
-      allocator_type>::template rebind_traits<value_type>::const_pointer;
-
-  // Alias used for heterogeneous lookup functions.
-  // `key_arg<K>` evaluates to `K` when the functors are transparent and to
-  // `key_type` otherwise. It permits template argument deduction on `K` for the
-  // transparent case.
-  template <class K>
-  using key_arg = typename KeyArgImpl::template type<K, key_type>;
-
- private:
-  // Give an early error when key_type is not hashable/eq.
-  auto KeyTypeCanBeHashed(const Hash& h, const key_type& k) -> decltype(h(k));
-  auto KeyTypeCanBeEq(const Eq& eq, const key_type& k) -> decltype(eq(k, k));
-
-  using Layout = absl::container_internal::Layout<ctrl_t, slot_type>;
-
-  static Layout MakeLayout(size_t capacity) {
-    assert(IsValidCapacity(capacity));
-    return Layout(capacity + Group::kWidth + 1, capacity);
-  }
-
-  using AllocTraits = absl::allocator_traits<allocator_type>;
-  using SlotAlloc = typename absl::allocator_traits<
-      allocator_type>::template rebind_alloc<slot_type>;
-  using SlotAllocTraits = typename absl::allocator_traits<
-      allocator_type>::template rebind_traits<slot_type>;
-
-  static_assert(std::is_lvalue_reference<reference>::value,
-                "Policy::element() must return a reference");
-
-  template <typename T>
-  struct SameAsElementReference
-      : std::is_same<typename std::remove_cv<
-                         typename std::remove_reference<reference>::type>::type,
-                     typename std::remove_cv<
-                         typename std::remove_reference<T>::type>::type> {};
-
-  // An enabler for insert(T&&): T must be convertible to init_type or be the
-  // same as [cv] value_type [ref].
-  // Note: we separate SameAsElementReference into its own type to avoid using
-  // reference unless we need to. MSVC doesn't seem to like it in some
-  // cases.
-  template <class T>
-  using RequiresInsertable = typename std::enable_if<
-      absl::disjunction<std::is_convertible<T, init_type>,
-                        SameAsElementReference<T>>::value,
-      int>::type;
-
-  // RequiresNotInit is a workaround for gcc prior to 7.1.
-  // See https://godbolt.org/g/Y4xsUh.
-  template <class T>
-  using RequiresNotInit =
-      typename std::enable_if<!std::is_same<T, init_type>::value, int>::type;
-
-  template <class... Ts>
-  using IsDecomposable = IsDecomposable<void, PolicyTraits, Hash, Eq, Ts...>;
-
- public:
-  static_assert(std::is_same<pointer, value_type*>::value,
-                "Allocators with custom pointer types are not supported");
-  static_assert(std::is_same<const_pointer, const value_type*>::value,
-                "Allocators with custom pointer types are not supported");
-
-  class iterator {
-    friend class raw_hash_set;
-
-   public:
-    using iterator_category = std::forward_iterator_tag;
-    using value_type = typename raw_hash_set::value_type;
-    using reference =
-        absl::conditional_t<PolicyTraits::constant_iterators::value,
-                            const value_type&, value_type&>;
-    using pointer = absl::remove_reference_t<reference>*;
-    using difference_type = typename raw_hash_set::difference_type;
-
-    iterator() {}
-
-    // PRECONDITION: not an end() iterator.
-    reference operator*() const {
-      AssertIsFull(ctrl_);
-      return PolicyTraits::element(slot_);
-    }
-
-    // PRECONDITION: not an end() iterator.
-    pointer operator->() const { return &operator*(); }
-
-    // PRECONDITION: not an end() iterator.
-    iterator& operator++() {
-      AssertIsFull(ctrl_);
-      ++ctrl_;
-      ++slot_;
-      skip_empty_or_deleted();
-      return *this;
-    }
-    // PRECONDITION: not an end() iterator.
-    iterator operator++(int) {
-      auto tmp = *this;
-      ++*this;
-      return tmp;
-    }
-
-    friend bool operator==(const iterator& a, const iterator& b) {
-      AssertIsValid(a.ctrl_);
-      AssertIsValid(b.ctrl_);
-      return a.ctrl_ == b.ctrl_;
-    }
-    friend bool operator!=(const iterator& a, const iterator& b) {
-      return !(a == b);
-    }
-
-   private:
-    iterator(ctrl_t* ctrl, slot_type* slot) : ctrl_(ctrl), slot_(slot) {
-      // This assumption helps the compiler know that any non-end iterator is
-      // not equal to any end iterator.
-      ABSL_INTERNAL_ASSUME(ctrl != nullptr);
-    }
-
-    void skip_empty_or_deleted() {
-      while (IsEmptyOrDeleted(*ctrl_)) {
-        uint32_t shift = Group{ctrl_}.CountLeadingEmptyOrDeleted();
-        ctrl_ += shift;
-        slot_ += shift;
-      }
-      if (ABSL_PREDICT_FALSE(*ctrl_ == kSentinel)) ctrl_ = nullptr;
-    }
-
-    ctrl_t* ctrl_ = nullptr;
-    // To avoid uninitialized member warnings, put slot_ in an anonymous union.
-    // The member is not initialized on singleton and end iterators.
-    union {
-      slot_type* slot_;
-    };
-  };
-
-  class const_iterator {
-    friend class raw_hash_set;
-
-   public:
-    using iterator_category = typename iterator::iterator_category;
-    using value_type = typename raw_hash_set::value_type;
-    using reference = typename raw_hash_set::const_reference;
-    using pointer = typename raw_hash_set::const_pointer;
-    using difference_type = typename raw_hash_set::difference_type;
-
-    const_iterator() {}
-    // Implicit construction from iterator.
-    const_iterator(iterator i) : inner_(std::move(i)) {}
-
-    reference operator*() const { return *inner_; }
-    pointer operator->() const { return inner_.operator->(); }
-
-    const_iterator& operator++() {
-      ++inner_;
-      return *this;
-    }
-    const_iterator operator++(int) { return inner_++; }
-
-    friend bool operator==(const const_iterator& a, const const_iterator& b) {
-      return a.inner_ == b.inner_;
-    }
-    friend bool operator!=(const const_iterator& a, const const_iterator& b) {
-      return !(a == b);
-    }
-
-   private:
-    const_iterator(const ctrl_t* ctrl, const slot_type* slot)
-        : inner_(const_cast<ctrl_t*>(ctrl), const_cast<slot_type*>(slot)) {}
-
-    iterator inner_;
-  };
-
-  using node_type = node_handle<Policy, hash_policy_traits<Policy>, Alloc>;
-  using insert_return_type = InsertReturnType<iterator, node_type>;
-
-  raw_hash_set() noexcept(
-      std::is_nothrow_default_constructible<hasher>::value&&
-          std::is_nothrow_default_constructible<key_equal>::value&&
-              std::is_nothrow_default_constructible<allocator_type>::value) {}
-
-  explicit raw_hash_set(size_t bucket_count, const hasher& hash = hasher(),
-                        const key_equal& eq = key_equal(),
-                        const allocator_type& alloc = allocator_type())
-      : ctrl_(EmptyGroup()), settings_(0, hash, eq, alloc) {
-    if (bucket_count) {
-      capacity_ = NormalizeCapacity(bucket_count);
-      initialize_slots();
-    }
-  }
-
-  raw_hash_set(size_t bucket_count, const hasher& hash,
-               const allocator_type& alloc)
-      : raw_hash_set(bucket_count, hash, key_equal(), alloc) {}
-
-  raw_hash_set(size_t bucket_count, const allocator_type& alloc)
-      : raw_hash_set(bucket_count, hasher(), key_equal(), alloc) {}
-
-  explicit raw_hash_set(const allocator_type& alloc)
-      : raw_hash_set(0, hasher(), key_equal(), alloc) {}
-
-  template <class InputIter>
-  raw_hash_set(InputIter first, InputIter last, size_t bucket_count = 0,
-               const hasher& hash = hasher(), const key_equal& eq = key_equal(),
-               const allocator_type& alloc = allocator_type())
-      : raw_hash_set(bucket_count, hash, eq, alloc) {
-    insert(first, last);
-  }
-
-  template <class InputIter>
-  raw_hash_set(InputIter first, InputIter last, size_t bucket_count,
-               const hasher& hash, const allocator_type& alloc)
-      : raw_hash_set(first, last, bucket_count, hash, key_equal(), alloc) {}
-
-  template <class InputIter>
-  raw_hash_set(InputIter first, InputIter last, size_t bucket_count,
-               const allocator_type& alloc)
-      : raw_hash_set(first, last, bucket_count, hasher(), key_equal(), alloc) {}
-
-  template <class InputIter>
-  raw_hash_set(InputIter first, InputIter last, const allocator_type& alloc)
-      : raw_hash_set(first, last, 0, hasher(), key_equal(), alloc) {}
-
-  // Instead of accepting std::initializer_list<value_type> as the first
-  // argument like std::unordered_set<value_type> does, we have two overloads
-  // that accept std::initializer_list<T> and std::initializer_list<init_type>.
-  // This is advantageous for performance.
-  //
-  //   // Turns {"abc", "def"} into std::initializer_list<std::string>, then
-  //   // copies the strings into the set.
-  //   std::unordered_set<std::string> s = {"abc", "def"};
-  //
-  //   // Turns {"abc", "def"} into std::initializer_list<const char*>, then
-  //   // copies the strings into the set.
-  //   absl::flat_hash_set<std::string> s = {"abc", "def"};
-  //
-  // The same trick is used in insert().
-  //
-  // The enabler is necessary to prevent this constructor from triggering where
-  // the copy constructor is meant to be called.
-  //
-  //   absl::flat_hash_set<int> a, b{a};
-  //
-  // RequiresNotInit<T> is a workaround for gcc prior to 7.1.
-  template <class T, RequiresNotInit<T> = 0, RequiresInsertable<T> = 0>
-  raw_hash_set(std::initializer_list<T> init, size_t bucket_count = 0,
-               const hasher& hash = hasher(), const key_equal& eq = key_equal(),
-               const allocator_type& alloc = allocator_type())
-      : raw_hash_set(init.begin(), init.end(), bucket_count, hash, eq, alloc) {}
-
-  raw_hash_set(std::initializer_list<init_type> init, size_t bucket_count = 0,
-               const hasher& hash = hasher(), const key_equal& eq = key_equal(),
-               const allocator_type& alloc = allocator_type())
-      : raw_hash_set(init.begin(), init.end(), bucket_count, hash, eq, alloc) {}
-
-  template <class T, RequiresNotInit<T> = 0, RequiresInsertable<T> = 0>
-  raw_hash_set(std::initializer_list<T> init, size_t bucket_count,
-               const hasher& hash, const allocator_type& alloc)
-      : raw_hash_set(init, bucket_count, hash, key_equal(), alloc) {}
-
-  raw_hash_set(std::initializer_list<init_type> init, size_t bucket_count,
-               const hasher& hash, const allocator_type& alloc)
-      : raw_hash_set(init, bucket_count, hash, key_equal(), alloc) {}
-
-  template <class T, RequiresNotInit<T> = 0, RequiresInsertable<T> = 0>
-  raw_hash_set(std::initializer_list<T> init, size_t bucket_count,
-               const allocator_type& alloc)
-      : raw_hash_set(init, bucket_count, hasher(), key_equal(), alloc) {}
-
-  raw_hash_set(std::initializer_list<init_type> init, size_t bucket_count,
-               const allocator_type& alloc)
-      : raw_hash_set(init, bucket_count, hasher(), key_equal(), alloc) {}
-
-  template <class T, RequiresNotInit<T> = 0, RequiresInsertable<T> = 0>
-  raw_hash_set(std::initializer_list<T> init, const allocator_type& alloc)
-      : raw_hash_set(init, 0, hasher(), key_equal(), alloc) {}
-
-  raw_hash_set(std::initializer_list<init_type> init,
-               const allocator_type& alloc)
-      : raw_hash_set(init, 0, hasher(), key_equal(), alloc) {}
-
-  raw_hash_set(const raw_hash_set& that)
-      : raw_hash_set(that, AllocTraits::select_on_container_copy_construction(
-                               that.alloc_ref())) {}
-
-  raw_hash_set(const raw_hash_set& that, const allocator_type& a)
-      : raw_hash_set(0, that.hash_ref(), that.eq_ref(), a) {
-    reserve(that.size());
-    // Because the table is guaranteed to be empty, we can do something faster
-    // than a full `insert`.
-    for (const auto& v : that) {
-      const size_t hash = PolicyTraits::apply(HashElement{hash_ref()}, v);
-      auto target = find_first_non_full(ctrl_, hash, capacity_);
-      set_ctrl(target.offset, H2(hash));
-      emplace_at(target.offset, v);
-      infoz_.RecordInsert(hash, target.probe_length);
-    }
-    size_ = that.size();
-    growth_left() -= that.size();
-  }
-
-  raw_hash_set(raw_hash_set&& that) noexcept(
-      std::is_nothrow_copy_constructible<hasher>::value&&
-          std::is_nothrow_copy_constructible<key_equal>::value&&
-              std::is_nothrow_copy_constructible<allocator_type>::value)
-      : ctrl_(absl::exchange(that.ctrl_, EmptyGroup())),
-        slots_(absl::exchange(that.slots_, nullptr)),
-        size_(absl::exchange(that.size_, 0)),
-        capacity_(absl::exchange(that.capacity_, 0)),
-        infoz_(absl::exchange(that.infoz_, HashtablezInfoHandle())),
-        // Hash, equality and allocator are copied instead of moved because
-        // `that` must be left valid. If Hash is std::function<Key>, moving it
-        // would create a nullptr functor that cannot be called.
-        settings_(that.settings_) {
-    // growth_left was copied above, reset the one from `that`.
-    that.growth_left() = 0;
-  }
-
-  raw_hash_set(raw_hash_set&& that, const allocator_type& a)
-      : ctrl_(EmptyGroup()),
-        slots_(nullptr),
-        size_(0),
-        capacity_(0),
-        settings_(0, that.hash_ref(), that.eq_ref(), a) {
-    if (a == that.alloc_ref()) {
-      std::swap(ctrl_, that.ctrl_);
-      std::swap(slots_, that.slots_);
-      std::swap(size_, that.size_);
-      std::swap(capacity_, that.capacity_);
-      std::swap(growth_left(), that.growth_left());
-      std::swap(infoz_, that.infoz_);
-    } else {
-      reserve(that.size());
-      // Note: this will copy elements of dense_set and unordered_set instead of
-      // moving them. This can be fixed if it ever becomes an issue.
-      for (auto& elem : that) insert(std::move(elem));
-    }
-  }
-
-  raw_hash_set& operator=(const raw_hash_set& that) {
-    raw_hash_set tmp(that,
-                     AllocTraits::propagate_on_container_copy_assignment::value
-                         ? that.alloc_ref()
-                         : alloc_ref());
-    swap(tmp);
-    return *this;
-  }
-
-  raw_hash_set& operator=(raw_hash_set&& that) noexcept(
-      absl::allocator_traits<allocator_type>::is_always_equal::value&&
-          std::is_nothrow_move_assignable<hasher>::value&&
-              std::is_nothrow_move_assignable<key_equal>::value) {
-    // TODO(sbenza): We should only use the operations from the noexcept clause
-    // to make sure we actually adhere to that contract.
-    return move_assign(
-        std::move(that),
-        typename AllocTraits::propagate_on_container_move_assignment());
-  }
-
-  ~raw_hash_set() { destroy_slots(); }
-
-  iterator begin() {
-    auto it = iterator_at(0);
-    it.skip_empty_or_deleted();
-    return it;
-  }
-  iterator end() { return {}; }
-
-  const_iterator begin() const {
-    return const_cast<raw_hash_set*>(this)->begin();
-  }
-  const_iterator end() const { return {}; }
-  const_iterator cbegin() const { return begin(); }
-  const_iterator cend() const { return end(); }
-
-  bool empty() const { return !size(); }
-  size_t size() const { return size_; }
-  size_t capacity() const { return capacity_; }
-  size_t max_size() const { return (std::numeric_limits<size_t>::max)(); }
-
-  ABSL_ATTRIBUTE_REINITIALIZES void clear() {
-    // Iterating over this container is O(bucket_count()). When bucket_count()
-    // is much greater than size(), iteration becomes prohibitively expensive.
-    // For clear() it is more important to reuse the allocated array when the
-    // container is small because allocation takes comparatively long time
-    // compared to destruction of the elements of the container. So we pick the
-    // largest bucket_count() threshold for which iteration is still fast and
-    // past that we simply deallocate the array.
-    if (capacity_ > 127) {
-      destroy_slots();
-    } else if (capacity_) {
-      for (size_t i = 0; i != capacity_; ++i) {
-        if (IsFull(ctrl_[i])) {
-          PolicyTraits::destroy(&alloc_ref(), slots_ + i);
-        }
-      }
-      size_ = 0;
-      reset_ctrl();
-      reset_growth_left();
-    }
-    assert(empty());
-    infoz_.RecordStorageChanged(0, capacity_);
-  }
-
-  // This overload kicks in when the argument is an rvalue of insertable and
-  // decomposable type other than init_type.
-  //
-  //   flat_hash_map<std::string, int> m;
-  //   m.insert(std::make_pair("abc", 42));
-  // TODO(cheshire): A type alias T2 is introduced as a workaround for the nvcc
-  // bug.
-  template <class T, RequiresInsertable<T> = 0,
-            class T2 = T,
-            typename std::enable_if<IsDecomposable<T2>::value, int>::type = 0,
-            T* = nullptr>
-  std::pair<iterator, bool> insert(T&& value) {
-    return emplace(std::forward<T>(value));
-  }
-
-  // This overload kicks in when the argument is a bitfield or an lvalue of
-  // insertable and decomposable type.
-  //
-  //   union { int n : 1; };
-  //   flat_hash_set<int> s;
-  //   s.insert(n);
-  //
-  //   flat_hash_set<std::string> s;
-  //   const char* p = "hello";
-  //   s.insert(p);
-  //
-  // TODO(romanp): Once we stop supporting gcc 5.1 and below, replace
-  // RequiresInsertable<T> with RequiresInsertable<const T&>.
-  // We are hitting this bug: https://godbolt.org/g/1Vht4f.
-  template <
-      class T, RequiresInsertable<T> = 0,
-      typename std::enable_if<IsDecomposable<const T&>::value, int>::type = 0>
-  std::pair<iterator, bool> insert(const T& value) {
-    return emplace(value);
-  }
-
-  // This overload kicks in when the argument is an rvalue of init_type. Its
-  // purpose is to handle brace-init-list arguments.
-  //
-  //   flat_hash_map<std::string, int> s;
-  //   s.insert({"abc", 42});
-  std::pair<iterator, bool> insert(init_type&& value) {
-    return emplace(std::move(value));
-  }
-
-  // TODO(cheshire): A type alias T2 is introduced as a workaround for the nvcc
-  // bug.
-  template <class T, RequiresInsertable<T> = 0, class T2 = T,
-            typename std::enable_if<IsDecomposable<T2>::value, int>::type = 0,
-            T* = nullptr>
-  iterator insert(const_iterator, T&& value) {
-    return insert(std::forward<T>(value)).first;
-  }
-
-  // TODO(romanp): Once we stop supporting gcc 5.1 and below, replace
-  // RequiresInsertable<T> with RequiresInsertable<const T&>.
-  // We are hitting this bug: https://godbolt.org/g/1Vht4f.
-  template <
-      class T, RequiresInsertable<T> = 0,
-      typename std::enable_if<IsDecomposable<const T&>::value, int>::type = 0>
-  iterator insert(const_iterator, const T& value) {
-    return insert(value).first;
-  }
-
-  iterator insert(const_iterator, init_type&& value) {
-    return insert(std::move(value)).first;
-  }
-
-  template <class InputIt>
-  void insert(InputIt first, InputIt last) {
-    for (; first != last; ++first) emplace(*first);
-  }
-
-  template <class T, RequiresNotInit<T> = 0, RequiresInsertable<const T&> = 0>
-  void insert(std::initializer_list<T> ilist) {
-    insert(ilist.begin(), ilist.end());
-  }
-
-  void insert(std::initializer_list<init_type> ilist) {
-    insert(ilist.begin(), ilist.end());
-  }
-
-  insert_return_type insert(node_type&& node) {
-    if (!node) return {end(), false, node_type()};
-    const auto& elem = PolicyTraits::element(CommonAccess::GetSlot(node));
-    auto res = PolicyTraits::apply(
-        InsertSlot<false>{*this, std::move(*CommonAccess::GetSlot(node))},
-        elem);
-    if (res.second) {
-      CommonAccess::Reset(&node);
-      return {res.first, true, node_type()};
-    } else {
-      return {res.first, false, std::move(node)};
-    }
-  }
-
-  iterator insert(const_iterator, node_type&& node) {
-    auto res = insert(std::move(node));
-    node = std::move(res.node);
-    return res.position;
-  }
-
-  // This overload kicks in if we can deduce the key from args. This enables us
-  // to avoid constructing value_type if an entry with the same key already
-  // exists.
-  //
-  // For example:
-  //
-  //   flat_hash_map<std::string, std::string> m = {{"abc", "def"}};
-  //   // Creates no std::string copies and makes no heap allocations.
-  //   m.emplace("abc", "xyz");
-  template <class... Args, typename std::enable_if<
-                               IsDecomposable<Args...>::value, int>::type = 0>
-  std::pair<iterator, bool> emplace(Args&&... args) {
-    return PolicyTraits::apply(EmplaceDecomposable{*this},
-                               std::forward<Args>(args)...);
-  }
-
-  // This overload kicks in if we cannot deduce the key from args. It constructs
-  // value_type unconditionally and then either moves it into the table or
-  // destroys.
-  template <class... Args, typename std::enable_if<
-                               !IsDecomposable<Args...>::value, int>::type = 0>
-  std::pair<iterator, bool> emplace(Args&&... args) {
-    alignas(slot_type) unsigned char raw[sizeof(slot_type)];
-    slot_type* slot = reinterpret_cast<slot_type*>(&raw);
-
-    PolicyTraits::construct(&alloc_ref(), slot, std::forward<Args>(args)...);
-    const auto& elem = PolicyTraits::element(slot);
-    return PolicyTraits::apply(InsertSlot<true>{*this, std::move(*slot)}, elem);
-  }
-
-  template <class... Args>
-  iterator emplace_hint(const_iterator, Args&&... args) {
-    return emplace(std::forward<Args>(args)...).first;
-  }
-
-  // Extension API: support for lazy emplace.
-  //
-  // Looks up key in the table. If found, returns the iterator to the element.
-  // Otherwise calls `f` with one argument of type `raw_hash_set::constructor`.
-  //
-  // `f` must abide by several restrictions:
-  //  - it MUST call `raw_hash_set::constructor` with arguments as if a
-  //    `raw_hash_set::value_type` is constructed,
-  //  - it MUST NOT access the container before the call to
-  //    `raw_hash_set::constructor`, and
-  //  - it MUST NOT erase the lazily emplaced element.
-  // Doing any of these is undefined behavior.
-  //
-  // For example:
-  //
-  //   std::unordered_set<ArenaString> s;
-  //   // Makes ArenaStr even if "abc" is in the map.
-  //   s.insert(ArenaString(&arena, "abc"));
-  //
-  //   flat_hash_set<ArenaStr> s;
-  //   // Makes ArenaStr only if "abc" is not in the map.
-  //   s.lazy_emplace("abc", [&](const constructor& ctor) {
-  //     ctor(&arena, "abc");
-  //   });
-  //
-  // WARNING: This API is currently experimental. If there is a way to implement
-  // the same thing with the rest of the API, prefer that.
-  class constructor {
-    friend class raw_hash_set;
-
-   public:
-    template <class... Args>
-    void operator()(Args&&... args) const {
-      assert(*slot_);
-      PolicyTraits::construct(alloc_, *slot_, std::forward<Args>(args)...);
-      *slot_ = nullptr;
-    }
-
-   private:
-    constructor(allocator_type* a, slot_type** slot) : alloc_(a), slot_(slot) {}
-
-    allocator_type* alloc_;
-    slot_type** slot_;
-  };
-
-  template <class K = key_type, class F>
-  iterator lazy_emplace(const key_arg<K>& key, F&& f) {
-    auto res = find_or_prepare_insert(key);
-    if (res.second) {
-      slot_type* slot = slots_ + res.first;
-      std::forward<F>(f)(constructor(&alloc_ref(), &slot));
-      assert(!slot);
-    }
-    return iterator_at(res.first);
-  }
-
-  // Extension API: support for heterogeneous keys.
-  //
-  //   std::unordered_set<std::string> s;
-  //   // Turns "abc" into std::string.
-  //   s.erase("abc");
-  //
-  //   flat_hash_set<std::string> s;
-  //   // Uses "abc" directly without copying it into std::string.
-  //   s.erase("abc");
-  template <class K = key_type>
-  size_type erase(const key_arg<K>& key) {
-    auto it = find(key);
-    if (it == end()) return 0;
-    erase(it);
-    return 1;
-  }
-
-  // Erases the element pointed to by `it`.  Unlike `std::unordered_set::erase`,
-  // this method returns void to reduce algorithmic complexity to O(1).  The
-  // iterator is invalidated, so any increment should be done before calling
-  // erase.  In order to erase while iterating across a map, use the following
-  // idiom (which also works for standard containers):
-  //
-  // for (auto it = m.begin(), end = m.end(); it != end;) {
-  //   // `erase()` will invalidate `it`, so advance `it` first.
-  //   auto copy_it = it++;
-  //   if (<pred>) {
-  //     m.erase(copy_it);
-  //   }
-  // }
-  void erase(const_iterator cit) { erase(cit.inner_); }
-
-  // This overload is necessary because otherwise erase<K>(const K&) would be
-  // a better match if non-const iterator is passed as an argument.
-  void erase(iterator it) {
-    AssertIsFull(it.ctrl_);
-    PolicyTraits::destroy(&alloc_ref(), it.slot_);
-    erase_meta_only(it);
-  }
-
-  iterator erase(const_iterator first, const_iterator last) {
-    while (first != last) {
-      erase(first++);
-    }
-    return last.inner_;
-  }
-
-  // Moves elements from `src` into `this`.
-  // If the element already exists in `this`, it is left unmodified in `src`.
-  template <typename H, typename E>
-  void merge(raw_hash_set<Policy, H, E, Alloc>& src) {  // NOLINT
-    assert(this != &src);
-    for (auto it = src.begin(), e = src.end(); it != e;) {
-      auto next = std::next(it);
-      if (PolicyTraits::apply(InsertSlot<false>{*this, std::move(*it.slot_)},
-                              PolicyTraits::element(it.slot_))
-              .second) {
-        src.erase_meta_only(it);
-      }
-      it = next;
-    }
-  }
-
-  template <typename H, typename E>
-  void merge(raw_hash_set<Policy, H, E, Alloc>&& src) {
-    merge(src);
-  }
-
-  node_type extract(const_iterator position) {
-    AssertIsFull(position.inner_.ctrl_);
-    auto node =
-        CommonAccess::Transfer<node_type>(alloc_ref(), position.inner_.slot_);
-    erase_meta_only(position);
-    return node;
-  }
-
-  template <
-      class K = key_type,
-      typename std::enable_if<!std::is_same<K, iterator>::value, int>::type = 0>
-  node_type extract(const key_arg<K>& key) {
-    auto it = find(key);
-    return it == end() ? node_type() : extract(const_iterator{it});
-  }
-
-  void swap(raw_hash_set& that) noexcept(
-      IsNoThrowSwappable<hasher>() && IsNoThrowSwappable<key_equal>() &&
-      IsNoThrowSwappable<allocator_type>(
-          typename AllocTraits::propagate_on_container_swap{})) {
-    using std::swap;
-    swap(ctrl_, that.ctrl_);
-    swap(slots_, that.slots_);
-    swap(size_, that.size_);
-    swap(capacity_, that.capacity_);
-    swap(growth_left(), that.growth_left());
-    swap(hash_ref(), that.hash_ref());
-    swap(eq_ref(), that.eq_ref());
-    swap(infoz_, that.infoz_);
-    SwapAlloc(alloc_ref(), that.alloc_ref(),
-              typename AllocTraits::propagate_on_container_swap{});
-  }
-
-  void rehash(size_t n) {
-    if (n == 0 && capacity_ == 0) return;
-    if (n == 0 && size_ == 0) {
-      destroy_slots();
-      infoz_.RecordStorageChanged(0, 0);
-      return;
-    }
-    // bitor is a faster way of doing `max` here. We will round up to the next
-    // power-of-2-minus-1, so bitor is good enough.
-    auto m = NormalizeCapacity(n | GrowthToLowerboundCapacity(size()));
-    // n == 0 unconditionally rehashes as per the standard.
-    if (n == 0 || m > capacity_) {
-      resize(m);
-    }
-  }
-
-  void reserve(size_t n) {
-    size_t m = GrowthToLowerboundCapacity(n);
-    if (m > capacity_) {
-      resize(NormalizeCapacity(m));
-    }
-  }
-
-  // Extension API: support for heterogeneous keys.
-  //
-  //   std::unordered_set<std::string> s;
-  //   // Turns "abc" into std::string.
-  //   s.count("abc");
-  //
-  //   ch_set<std::string> s;
-  //   // Uses "abc" directly without copying it into std::string.
-  //   s.count("abc");
-  template <class K = key_type>
-  size_t count(const key_arg<K>& key) const {
-    return find(key) == end() ? 0 : 1;
-  }
-
-  // Issues CPU prefetch instructions for the memory needed to find or insert
-  // a key.  Like all lookup functions, this support heterogeneous keys.
-  //
-  // NOTE: This is a very low level operation and should not be used without
-  // specific benchmarks indicating its importance.
-  template <class K = key_type>
-  void prefetch(const key_arg<K>& key) const {
-    (void)key;
-#if defined(__GNUC__)
-    auto seq = probe(ctrl_, hash_ref()(key), capacity_);
-    __builtin_prefetch(static_cast<const void*>(ctrl_ + seq.offset()));
-    __builtin_prefetch(static_cast<const void*>(slots_ + seq.offset()));
-#endif  // __GNUC__
-  }
-
-  // The API of find() has two extensions.
-  //
-  // 1. The hash can be passed by the user. It must be equal to the hash of the
-  // key.
-  //
-  // 2. The type of the key argument doesn't have to be key_type. This is so
-  // called heterogeneous key support.
-  template <class K = key_type>
-  iterator find(const key_arg<K>& key, size_t hash) {
-    auto seq = probe(ctrl_, hash, capacity_);
-    while (true) {
-      Group g{ctrl_ + seq.offset()};
-      for (int i : g.Match(H2(hash))) {
-        if (ABSL_PREDICT_TRUE(PolicyTraits::apply(
-                EqualElement<K>{key, eq_ref()},
-                PolicyTraits::element(slots_ + seq.offset(i)))))
-          return iterator_at(seq.offset(i));
-      }
-      if (ABSL_PREDICT_TRUE(g.MatchEmpty())) return end();
-      seq.next();
-      assert(seq.index() < capacity_ && "full table!");
-    }
-  }
-  template <class K = key_type>
-  iterator find(const key_arg<K>& key) {
-    return find(key, hash_ref()(key));
-  }
-
-  template <class K = key_type>
-  const_iterator find(const key_arg<K>& key, size_t hash) const {
-    return const_cast<raw_hash_set*>(this)->find(key, hash);
-  }
-  template <class K = key_type>
-  const_iterator find(const key_arg<K>& key) const {
-    return find(key, hash_ref()(key));
-  }
-
-  template <class K = key_type>
-  bool contains(const key_arg<K>& key) const {
-    return find(key) != end();
-  }
-
-  template <class K = key_type>
-  std::pair<iterator, iterator> equal_range(const key_arg<K>& key) {
-    auto it = find(key);
-    if (it != end()) return {it, std::next(it)};
-    return {it, it};
-  }
-  template <class K = key_type>
-  std::pair<const_iterator, const_iterator> equal_range(
-      const key_arg<K>& key) const {
-    auto it = find(key);
-    if (it != end()) return {it, std::next(it)};
-    return {it, it};
-  }
-
-  size_t bucket_count() const { return capacity_; }
-  float load_factor() const {
-    return capacity_ ? static_cast<double>(size()) / capacity_ : 0.0;
-  }
-  float max_load_factor() const { return 1.0f; }
-  void max_load_factor(float) {
-    // Does nothing.
-  }
-
-  hasher hash_function() const { return hash_ref(); }
-  key_equal key_eq() const { return eq_ref(); }
-  allocator_type get_allocator() const { return alloc_ref(); }
-
-  friend bool operator==(const raw_hash_set& a, const raw_hash_set& b) {
-    if (a.size() != b.size()) return false;
-    const raw_hash_set* outer = &a;
-    const raw_hash_set* inner = &b;
-    if (outer->capacity() > inner->capacity()) std::swap(outer, inner);
-    for (const value_type& elem : *outer)
-      if (!inner->has_element(elem)) return false;
-    return true;
-  }
-
-  friend bool operator!=(const raw_hash_set& a, const raw_hash_set& b) {
-    return !(a == b);
-  }
-
-  friend void swap(raw_hash_set& a,
-                   raw_hash_set& b) noexcept(noexcept(a.swap(b))) {
-    a.swap(b);
-  }
-
- private:
-  template <class Container, typename Enabler>
-  friend struct absl::container_internal::hashtable_debug_internal::
-      HashtableDebugAccess;
-
-  struct FindElement {
-    template <class K, class... Args>
-    const_iterator operator()(const K& key, Args&&...) const {
-      return s.find(key);
-    }
-    const raw_hash_set& s;
-  };
-
-  struct HashElement {
-    template <class K, class... Args>
-    size_t operator()(const K& key, Args&&...) const {
-      return h(key);
-    }
-    const hasher& h;
-  };
-
-  template <class K1>
-  struct EqualElement {
-    template <class K2, class... Args>
-    bool operator()(const K2& lhs, Args&&...) const {
-      return eq(lhs, rhs);
-    }
-    const K1& rhs;
-    const key_equal& eq;
-  };
-
-  struct EmplaceDecomposable {
-    template <class K, class... Args>
-    std::pair<iterator, bool> operator()(const K& key, Args&&... args) const {
-      auto res = s.find_or_prepare_insert(key);
-      if (res.second) {
-        s.emplace_at(res.first, std::forward<Args>(args)...);
-      }
-      return {s.iterator_at(res.first), res.second};
-    }
-    raw_hash_set& s;
-  };
-
-  template <bool do_destroy>
-  struct InsertSlot {
-    template <class K, class... Args>
-    std::pair<iterator, bool> operator()(const K& key, Args&&...) && {
-      auto res = s.find_or_prepare_insert(key);
-      if (res.second) {
-        PolicyTraits::transfer(&s.alloc_ref(), s.slots_ + res.first, &slot);
-      } else if (do_destroy) {
-        PolicyTraits::destroy(&s.alloc_ref(), &slot);
-      }
-      return {s.iterator_at(res.first), res.second};
-    }
-    raw_hash_set& s;
-    // Constructed slot. Either moved into place or destroyed.
-    slot_type&& slot;
-  };
-
-  // "erases" the object from the container, except that it doesn't actually
-  // destroy the object. It only updates all the metadata of the class.
-  // This can be used in conjunction with Policy::transfer to move the object to
-  // another place.
-  void erase_meta_only(const_iterator it) {
-    assert(IsFull(*it.inner_.ctrl_) && "erasing a dangling iterator");
-    --size_;
-    const size_t index = it.inner_.ctrl_ - ctrl_;
-    const size_t index_before = (index - Group::kWidth) & capacity_;
-    const auto empty_after = Group(it.inner_.ctrl_).MatchEmpty();
-    const auto empty_before = Group(ctrl_ + index_before).MatchEmpty();
-
-    // We count how many consecutive non empties we have to the right and to the
-    // left of `it`. If the sum is >= kWidth then there is at least one probe
-    // window that might have seen a full group.
-    bool was_never_full =
-        empty_before && empty_after &&
-        static_cast<size_t>(empty_after.TrailingZeros() +
-                            empty_before.LeadingZeros()) < Group::kWidth;
-
-    set_ctrl(index, was_never_full ? kEmpty : kDeleted);
-    growth_left() += was_never_full;
-    infoz_.RecordErase();
-  }
-
-  void initialize_slots() {
-    assert(capacity_);
-    // Folks with custom allocators often make unwarranted assumptions about the
-    // behavior of their classes vis-a-vis trivial destructability and what
-    // calls they will or wont make.  Avoid sampling for people with custom
-    // allocators to get us out of this mess.  This is not a hard guarantee but
-    // a workaround while we plan the exact guarantee we want to provide.
-    //
-    // People are often sloppy with the exact type of their allocator (sometimes
-    // it has an extra const or is missing the pair, but rebinds made it work
-    // anyway).  To avoid the ambiguity, we work off SlotAlloc which we have
-    // bound more carefully.
-    if (std::is_same<SlotAlloc, std::allocator<slot_type>>::value &&
-        slots_ == nullptr) {
-      infoz_ = Sample();
-    }
-
-    auto layout = MakeLayout(capacity_);
-    char* mem = static_cast<char*>(
-        Allocate<Layout::Alignment()>(&alloc_ref(), layout.AllocSize()));
-    ctrl_ = reinterpret_cast<ctrl_t*>(layout.template Pointer<0>(mem));
-    slots_ = layout.template Pointer<1>(mem);
-    reset_ctrl();
-    reset_growth_left();
-    infoz_.RecordStorageChanged(size_, capacity_);
-  }
-
-  void destroy_slots() {
-    if (!capacity_) return;
-    for (size_t i = 0; i != capacity_; ++i) {
-      if (IsFull(ctrl_[i])) {
-        PolicyTraits::destroy(&alloc_ref(), slots_ + i);
-      }
-    }
-    auto layout = MakeLayout(capacity_);
-    // Unpoison before returning the memory to the allocator.
-    SanitizerUnpoisonMemoryRegion(slots_, sizeof(slot_type) * capacity_);
-    Deallocate<Layout::Alignment()>(&alloc_ref(), ctrl_, layout.AllocSize());
-    ctrl_ = EmptyGroup();
-    slots_ = nullptr;
-    size_ = 0;
-    capacity_ = 0;
-    growth_left() = 0;
-  }
-
-  void resize(size_t new_capacity) {
-    assert(IsValidCapacity(new_capacity));
-    auto* old_ctrl = ctrl_;
-    auto* old_slots = slots_;
-    const size_t old_capacity = capacity_;
-    capacity_ = new_capacity;
-    initialize_slots();
-
-    size_t total_probe_length = 0;
-    for (size_t i = 0; i != old_capacity; ++i) {
-      if (IsFull(old_ctrl[i])) {
-        size_t hash = PolicyTraits::apply(HashElement{hash_ref()},
-                                          PolicyTraits::element(old_slots + i));
-        auto target = find_first_non_full(ctrl_, hash, capacity_);
-        size_t new_i = target.offset;
-        total_probe_length += target.probe_length;
-        set_ctrl(new_i, H2(hash));
-        PolicyTraits::transfer(&alloc_ref(), slots_ + new_i, old_slots + i);
-      }
-    }
-    if (old_capacity) {
-      SanitizerUnpoisonMemoryRegion(old_slots,
-                                    sizeof(slot_type) * old_capacity);
-      auto layout = MakeLayout(old_capacity);
-      Deallocate<Layout::Alignment()>(&alloc_ref(), old_ctrl,
-                                      layout.AllocSize());
-    }
-    infoz_.RecordRehash(total_probe_length);
-  }
-
-  void drop_deletes_without_resize() ABSL_ATTRIBUTE_NOINLINE {
-    assert(IsValidCapacity(capacity_));
-    assert(!is_small(capacity_));
-    // Algorithm:
-    // - mark all DELETED slots as EMPTY
-    // - mark all FULL slots as DELETED
-    // - for each slot marked as DELETED
-    //     hash = Hash(element)
-    //     target = find_first_non_full(hash)
-    //     if target is in the same group
-    //       mark slot as FULL
-    //     else if target is EMPTY
-    //       transfer element to target
-    //       mark slot as EMPTY
-    //       mark target as FULL
-    //     else if target is DELETED
-    //       swap current element with target element
-    //       mark target as FULL
-    //       repeat procedure for current slot with moved from element (target)
-    ConvertDeletedToEmptyAndFullToDeleted(ctrl_, capacity_);
-    alignas(slot_type) unsigned char raw[sizeof(slot_type)];
-    size_t total_probe_length = 0;
-    slot_type* slot = reinterpret_cast<slot_type*>(&raw);
-    for (size_t i = 0; i != capacity_; ++i) {
-      if (!IsDeleted(ctrl_[i])) continue;
-      size_t hash = PolicyTraits::apply(HashElement{hash_ref()},
-                                        PolicyTraits::element(slots_ + i));
-      auto target = find_first_non_full(ctrl_, hash, capacity_);
-      size_t new_i = target.offset;
-      total_probe_length += target.probe_length;
-
-      // Verify if the old and new i fall within the same group wrt the hash.
-      // If they do, we don't need to move the object as it falls already in the
-      // best probe we can.
-      const auto probe_index = [&](size_t pos) {
-        return ((pos - probe(ctrl_, hash, capacity_).offset()) & capacity_) /
-               Group::kWidth;
-      };
-
-      // Element doesn't move.
-      if (ABSL_PREDICT_TRUE(probe_index(new_i) == probe_index(i))) {
-        set_ctrl(i, H2(hash));
-        continue;
-      }
-      if (IsEmpty(ctrl_[new_i])) {
-        // Transfer element to the empty spot.
-        // set_ctrl poisons/unpoisons the slots so we have to call it at the
-        // right time.
-        set_ctrl(new_i, H2(hash));
-        PolicyTraits::transfer(&alloc_ref(), slots_ + new_i, slots_ + i);
-        set_ctrl(i, kEmpty);
-      } else {
-        assert(IsDeleted(ctrl_[new_i]));
-        set_ctrl(new_i, H2(hash));
-        // Until we are done rehashing, DELETED marks previously FULL slots.
-        // Swap i and new_i elements.
-        PolicyTraits::transfer(&alloc_ref(), slot, slots_ + i);
-        PolicyTraits::transfer(&alloc_ref(), slots_ + i, slots_ + new_i);
-        PolicyTraits::transfer(&alloc_ref(), slots_ + new_i, slot);
-        --i;  // repeat
-      }
-    }
-    reset_growth_left();
-    infoz_.RecordRehash(total_probe_length);
-  }
-
-  void rehash_and_grow_if_necessary() {
-    if (capacity_ == 0) {
-      resize(1);
-    } else if (size() <= CapacityToGrowth(capacity()) / 2) {
-      // Squash DELETED without growing if there is enough capacity.
-      drop_deletes_without_resize();
-    } else {
-      // Otherwise grow the container.
-      resize(capacity_ * 2 + 1);
-    }
-  }
-
-  bool has_element(const value_type& elem) const {
-    size_t hash = PolicyTraits::apply(HashElement{hash_ref()}, elem);
-    auto seq = probe(ctrl_, hash, capacity_);
-    while (true) {
-      Group g{ctrl_ + seq.offset()};
-      for (int i : g.Match(H2(hash))) {
-        if (ABSL_PREDICT_TRUE(PolicyTraits::element(slots_ + seq.offset(i)) ==
-                              elem))
-          return true;
-      }
-      if (ABSL_PREDICT_TRUE(g.MatchEmpty())) return false;
-      seq.next();
-      assert(seq.index() < capacity_ && "full table!");
-    }
-    return false;
-  }
-
-  // TODO(alkis): Optimize this assuming *this and that don't overlap.
-  raw_hash_set& move_assign(raw_hash_set&& that, std::true_type) {
-    raw_hash_set tmp(std::move(that));
-    swap(tmp);
-    return *this;
-  }
-  raw_hash_set& move_assign(raw_hash_set&& that, std::false_type) {
-    raw_hash_set tmp(std::move(that), alloc_ref());
-    swap(tmp);
-    return *this;
-  }
-
- protected:
-  template <class K>
-  std::pair<size_t, bool> find_or_prepare_insert(const K& key) {
-    auto hash = hash_ref()(key);
-    auto seq = probe(ctrl_, hash, capacity_);
-    while (true) {
-      Group g{ctrl_ + seq.offset()};
-      for (int i : g.Match(H2(hash))) {
-        if (ABSL_PREDICT_TRUE(PolicyTraits::apply(
-                EqualElement<K>{key, eq_ref()},
-                PolicyTraits::element(slots_ + seq.offset(i)))))
-          return {seq.offset(i), false};
-      }
-      if (ABSL_PREDICT_TRUE(g.MatchEmpty())) break;
-      seq.next();
-      assert(seq.index() < capacity_ && "full table!");
-    }
-    return {prepare_insert(hash), true};
-  }
-
-  size_t prepare_insert(size_t hash) ABSL_ATTRIBUTE_NOINLINE {
-    auto target = find_first_non_full(ctrl_, hash, capacity_);
-    if (ABSL_PREDICT_FALSE(growth_left() == 0 &&
-                           !IsDeleted(ctrl_[target.offset]))) {
-      rehash_and_grow_if_necessary();
-      target = find_first_non_full(ctrl_, hash, capacity_);
-    }
-    ++size_;
-    growth_left() -= IsEmpty(ctrl_[target.offset]);
-    set_ctrl(target.offset, H2(hash));
-    infoz_.RecordInsert(hash, target.probe_length);
-    return target.offset;
-  }
-
-  // Constructs the value in the space pointed by the iterator. This only works
-  // after an unsuccessful find_or_prepare_insert() and before any other
-  // modifications happen in the raw_hash_set.
-  //
-  // PRECONDITION: i is an index returned from find_or_prepare_insert(k), where
-  // k is the key decomposed from `forward<Args>(args)...`, and the bool
-  // returned by find_or_prepare_insert(k) was true.
-  // POSTCONDITION: *m.iterator_at(i) == value_type(forward<Args>(args)...).
-  template <class... Args>
-  void emplace_at(size_t i, Args&&... args) {
-    PolicyTraits::construct(&alloc_ref(), slots_ + i,
-                            std::forward<Args>(args)...);
-
-    assert(PolicyTraits::apply(FindElement{*this}, *iterator_at(i)) ==
-               iterator_at(i) &&
-           "constructed value does not match the lookup key");
-  }
-
-  iterator iterator_at(size_t i) { return {ctrl_ + i, slots_ + i}; }
-  const_iterator iterator_at(size_t i) const { return {ctrl_ + i, slots_ + i}; }
-
- private:
-  friend struct RawHashSetTestOnlyAccess;
-
-  // Reset all ctrl bytes back to kEmpty, except the sentinel.
-  void reset_ctrl() {
-    std::memset(ctrl_, kEmpty, capacity_ + Group::kWidth);
-    ctrl_[capacity_] = kSentinel;
-    SanitizerPoisonMemoryRegion(slots_, sizeof(slot_type) * capacity_);
-  }
-
-  void reset_growth_left() {
-    growth_left() = CapacityToGrowth(capacity()) - size_;
-  }
-
-  // Sets the control byte, and if `i < Group::kWidth`, set the cloned byte at
-  // the end too.
-  void set_ctrl(size_t i, ctrl_t h) {
-    assert(i < capacity_);
-
-    if (IsFull(h)) {
-      SanitizerUnpoisonObject(slots_ + i);
-    } else {
-      SanitizerPoisonObject(slots_ + i);
-    }
-
-    ctrl_[i] = h;
-    ctrl_[((i - Group::kWidth) & capacity_) + 1 +
-          ((Group::kWidth - 1) & capacity_)] = h;
-  }
-
-  size_t& growth_left() { return settings_.template get<0>(); }
-
-  hasher& hash_ref() { return settings_.template get<1>(); }
-  const hasher& hash_ref() const { return settings_.template get<1>(); }
-  key_equal& eq_ref() { return settings_.template get<2>(); }
-  const key_equal& eq_ref() const { return settings_.template get<2>(); }
-  allocator_type& alloc_ref() { return settings_.template get<3>(); }
-  const allocator_type& alloc_ref() const {
-    return settings_.template get<3>();
-  }
-
-  // TODO(alkis): Investigate removing some of these fields:
-  // - ctrl/slots can be derived from each other
-  // - size can be moved into the slot array
-  ctrl_t* ctrl_ = EmptyGroup();    // [(capacity + 1) * ctrl_t]
-  slot_type* slots_ = nullptr;     // [capacity * slot_type]
-  size_t size_ = 0;                // number of full slots
-  size_t capacity_ = 0;            // total number of slots
-  HashtablezInfoHandle infoz_;
-  absl::container_internal::CompressedTuple<size_t /* growth_left */, hasher,
-                                            key_equal, allocator_type>
-      settings_{0, hasher{}, key_equal{}, allocator_type{}};
-};
-
-// Erases all elements that satisfy the predicate `pred` from the container `c`.
-template <typename P, typename H, typename E, typename A, typename Predicate>
-void EraseIf(Predicate pred, raw_hash_set<P, H, E, A>* c) {
-  for (auto it = c->begin(), last = c->end(); it != last;) {
-    auto copy_it = it++;
-    if (pred(*copy_it)) {
-      c->erase(copy_it);
-    }
-  }
-}
-
-namespace hashtable_debug_internal {
-template <typename Set>
-struct HashtableDebugAccess<Set, absl::void_t<typename Set::raw_hash_set>> {
-  using Traits = typename Set::PolicyTraits;
-  using Slot = typename Traits::slot_type;
-
-  static size_t GetNumProbes(const Set& set,
-                             const typename Set::key_type& key) {
-    size_t num_probes = 0;
-    size_t hash = set.hash_ref()(key);
-    auto seq = probe(set.ctrl_, hash, set.capacity_);
-    while (true) {
-      container_internal::Group g{set.ctrl_ + seq.offset()};
-      for (int i : g.Match(container_internal::H2(hash))) {
-        if (Traits::apply(
-                typename Set::template EqualElement<typename Set::key_type>{
-                    key, set.eq_ref()},
-                Traits::element(set.slots_ + seq.offset(i))))
-          return num_probes;
-        ++num_probes;
-      }
-      if (g.MatchEmpty()) return num_probes;
-      seq.next();
-      ++num_probes;
-    }
-  }
-
-  static size_t AllocatedByteSize(const Set& c) {
-    size_t capacity = c.capacity_;
-    if (capacity == 0) return 0;
-    auto layout = Set::MakeLayout(capacity);
-    size_t m = layout.AllocSize();
-
-    size_t per_slot = Traits::space_used(static_cast<const Slot*>(nullptr));
-    if (per_slot != ~size_t{}) {
-      m += per_slot * c.size();
-    } else {
-      for (size_t i = 0; i != capacity; ++i) {
-        if (container_internal::IsFull(c.ctrl_[i])) {
-          m += Traits::space_used(c.slots_ + i);
-        }
-      }
-    }
-    return m;
-  }
-
-  static size_t LowerBoundAllocatedByteSize(size_t size) {
-    size_t capacity = GrowthToLowerboundCapacity(size);
-    if (capacity == 0) return 0;
-    auto layout = Set::MakeLayout(NormalizeCapacity(capacity));
-    size_t m = layout.AllocSize();
-    size_t per_slot = Traits::space_used(static_cast<const Slot*>(nullptr));
-    if (per_slot != ~size_t{}) {
-      m += per_slot * size;
-    }
-    return m;
-  }
-};
-
-}  // namespace hashtable_debug_internal
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_RAW_HASH_SET_H_
diff --git a/third_party/abseil/absl/container/internal/raw_hash_set_allocator_test.cc b/third_party/abseil/absl/container/internal/raw_hash_set_allocator_test.cc
deleted file mode 100644
index e73f53f..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_set_allocator_test.cc
+++ /dev/null
@@ -1,505 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <limits>
-#include <scoped_allocator>
-
-#include "gtest/gtest.h"
-#include "absl/container/internal/raw_hash_set.h"
-#include "absl/container/internal/tracked.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-enum AllocSpec {
-  kPropagateOnCopy = 1,
-  kPropagateOnMove = 2,
-  kPropagateOnSwap = 4,
-};
-
-struct AllocState {
-  size_t num_allocs = 0;
-  std::set<void*> owned;
-};
-
-template <class T,
-          int Spec = kPropagateOnCopy | kPropagateOnMove | kPropagateOnSwap>
-class CheckedAlloc {
- public:
-  template <class, int>
-  friend class CheckedAlloc;
-
-  using value_type = T;
-
-  CheckedAlloc() {}
-  explicit CheckedAlloc(size_t id) : id_(id) {}
-  CheckedAlloc(const CheckedAlloc&) = default;
-  CheckedAlloc& operator=(const CheckedAlloc&) = default;
-
-  template <class U>
-  CheckedAlloc(const CheckedAlloc<U, Spec>& that)
-      : id_(that.id_), state_(that.state_) {}
-
-  template <class U>
-  struct rebind {
-    using other = CheckedAlloc<U, Spec>;
-  };
-
-  using propagate_on_container_copy_assignment =
-      std::integral_constant<bool, (Spec & kPropagateOnCopy) != 0>;
-
-  using propagate_on_container_move_assignment =
-      std::integral_constant<bool, (Spec & kPropagateOnMove) != 0>;
-
-  using propagate_on_container_swap =
-      std::integral_constant<bool, (Spec & kPropagateOnSwap) != 0>;
-
-  CheckedAlloc select_on_container_copy_construction() const {
-    if (Spec & kPropagateOnCopy) return *this;
-    return {};
-  }
-
-  T* allocate(size_t n) {
-    T* ptr = std::allocator<T>().allocate(n);
-    track_alloc(ptr);
-    return ptr;
-  }
-  void deallocate(T* ptr, size_t n) {
-    memset(ptr, 0, n * sizeof(T));  // The freed memory must be unpoisoned.
-    track_dealloc(ptr);
-    return std::allocator<T>().deallocate(ptr, n);
-  }
-
-  friend bool operator==(const CheckedAlloc& a, const CheckedAlloc& b) {
-    return a.id_ == b.id_;
-  }
-  friend bool operator!=(const CheckedAlloc& a, const CheckedAlloc& b) {
-    return !(a == b);
-  }
-
-  size_t num_allocs() const { return state_->num_allocs; }
-
-  void swap(CheckedAlloc& that) {
-    using std::swap;
-    swap(id_, that.id_);
-    swap(state_, that.state_);
-  }
-
-  friend void swap(CheckedAlloc& a, CheckedAlloc& b) { a.swap(b); }
-
-  friend std::ostream& operator<<(std::ostream& o, const CheckedAlloc& a) {
-    return o << "alloc(" << a.id_ << ")";
-  }
-
- private:
-  void track_alloc(void* ptr) {
-    AllocState* state = state_.get();
-    ++state->num_allocs;
-    if (!state->owned.insert(ptr).second)
-      ADD_FAILURE() << *this << " got previously allocated memory: " << ptr;
-  }
-  void track_dealloc(void* ptr) {
-    if (state_->owned.erase(ptr) != 1)
-      ADD_FAILURE() << *this
-                    << " deleting memory owned by another allocator: " << ptr;
-  }
-
-  size_t id_ = std::numeric_limits<size_t>::max();
-
-  std::shared_ptr<AllocState> state_ = std::make_shared<AllocState>();
-};
-
-struct Identity {
-  int32_t operator()(int32_t v) const { return v; }
-};
-
-struct Policy {
-  using slot_type = Tracked<int32_t>;
-  using init_type = Tracked<int32_t>;
-  using key_type = int32_t;
-
-  template <class allocator_type, class... Args>
-  static void construct(allocator_type* alloc, slot_type* slot,
-                        Args&&... args) {
-    std::allocator_traits<allocator_type>::construct(
-        *alloc, slot, std::forward<Args>(args)...);
-  }
-
-  template <class allocator_type>
-  static void destroy(allocator_type* alloc, slot_type* slot) {
-    std::allocator_traits<allocator_type>::destroy(*alloc, slot);
-  }
-
-  template <class allocator_type>
-  static void transfer(allocator_type* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    construct(alloc, new_slot, std::move(*old_slot));
-    destroy(alloc, old_slot);
-  }
-
-  template <class F>
-  static auto apply(F&& f, int32_t v) -> decltype(std::forward<F>(f)(v, v)) {
-    return std::forward<F>(f)(v, v);
-  }
-
-  template <class F>
-  static auto apply(F&& f, const slot_type& v)
-      -> decltype(std::forward<F>(f)(v.val(), v)) {
-    return std::forward<F>(f)(v.val(), v);
-  }
-
-  template <class F>
-  static auto apply(F&& f, slot_type&& v)
-      -> decltype(std::forward<F>(f)(v.val(), std::move(v))) {
-    return std::forward<F>(f)(v.val(), std::move(v));
-  }
-
-  static slot_type& element(slot_type* slot) { return *slot; }
-};
-
-template <int Spec>
-struct PropagateTest : public ::testing::Test {
-  using Alloc = CheckedAlloc<Tracked<int32_t>, Spec>;
-
-  using Table = raw_hash_set<Policy, Identity, std::equal_to<int32_t>, Alloc>;
-
-  PropagateTest() {
-    EXPECT_EQ(a1, t1.get_allocator());
-    EXPECT_NE(a2, t1.get_allocator());
-  }
-
-  Alloc a1 = Alloc(1);
-  Table t1 = Table(0, a1);
-  Alloc a2 = Alloc(2);
-};
-
-using PropagateOnAll =
-    PropagateTest<kPropagateOnCopy | kPropagateOnMove | kPropagateOnSwap>;
-using NoPropagateOnCopy = PropagateTest<kPropagateOnMove | kPropagateOnSwap>;
-using NoPropagateOnMove = PropagateTest<kPropagateOnCopy | kPropagateOnSwap>;
-
-TEST_F(PropagateOnAll, Empty) { EXPECT_EQ(0, a1.num_allocs()); }
-
-TEST_F(PropagateOnAll, InsertAllocates) {
-  auto it = t1.insert(0).first;
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, InsertDecomposes) {
-  auto it = t1.insert(0).first;
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-
-  EXPECT_FALSE(t1.insert(0).second);
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, RehashMoves) {
-  auto it = t1.insert(0).first;
-  EXPECT_EQ(0, it->num_moves());
-  t1.rehash(2 * t1.capacity());
-  EXPECT_EQ(2, a1.num_allocs());
-  it = t1.find(0);
-  EXPECT_EQ(1, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, CopyConstructor) {
-  auto it = t1.insert(0).first;
-  Table u(t1);
-  EXPECT_EQ(2, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(NoPropagateOnCopy, CopyConstructor) {
-  auto it = t1.insert(0).first;
-  Table u(t1);
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, u.get_allocator().num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, CopyConstructorWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(t1, a1);
-  EXPECT_EQ(2, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(NoPropagateOnCopy, CopyConstructorWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(t1, a1);
-  EXPECT_EQ(2, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, CopyConstructorWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(t1, a2);
-  EXPECT_EQ(a2, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, a2.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(NoPropagateOnCopy, CopyConstructorWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(t1, a2);
-  EXPECT_EQ(a2, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, a2.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, MoveConstructor) {
-  auto it = t1.insert(0).first;
-  Table u(std::move(t1));
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(NoPropagateOnMove, MoveConstructor) {
-  auto it = t1.insert(0).first;
-  Table u(std::move(t1));
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, MoveConstructorWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(std::move(t1), a1);
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(NoPropagateOnMove, MoveConstructorWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(std::move(t1), a1);
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, MoveConstructorWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(std::move(t1), a2);
-  it = u.find(0);
-  EXPECT_EQ(a2, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, a2.num_allocs());
-  EXPECT_EQ(1, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(NoPropagateOnMove, MoveConstructorWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(std::move(t1), a2);
-  it = u.find(0);
-  EXPECT_EQ(a2, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, a2.num_allocs());
-  EXPECT_EQ(1, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, CopyAssignmentWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a1);
-  u = t1;
-  EXPECT_EQ(2, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(NoPropagateOnCopy, CopyAssignmentWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a1);
-  u = t1;
-  EXPECT_EQ(2, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, CopyAssignmentWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a2);
-  u = t1;
-  EXPECT_EQ(a1, u.get_allocator());
-  EXPECT_EQ(2, a1.num_allocs());
-  EXPECT_EQ(0, a2.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(NoPropagateOnCopy, CopyAssignmentWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a2);
-  u = t1;
-  EXPECT_EQ(a2, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, a2.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(1, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, MoveAssignmentWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a1);
-  u = std::move(t1);
-  EXPECT_EQ(a1, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(NoPropagateOnMove, MoveAssignmentWithSameAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a1);
-  u = std::move(t1);
-  EXPECT_EQ(a1, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, MoveAssignmentWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a2);
-  u = std::move(t1);
-  EXPECT_EQ(a1, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, a2.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(NoPropagateOnMove, MoveAssignmentWithDifferentAlloc) {
-  auto it = t1.insert(0).first;
-  Table u(0, a2);
-  u = std::move(t1);
-  it = u.find(0);
-  EXPECT_EQ(a2, u.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(1, a2.num_allocs());
-  EXPECT_EQ(1, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-TEST_F(PropagateOnAll, Swap) {
-  auto it = t1.insert(0).first;
-  Table u(0, a2);
-  u.swap(t1);
-  EXPECT_EQ(a1, u.get_allocator());
-  EXPECT_EQ(a2, t1.get_allocator());
-  EXPECT_EQ(1, a1.num_allocs());
-  EXPECT_EQ(0, a2.num_allocs());
-  EXPECT_EQ(0, it->num_moves());
-  EXPECT_EQ(0, it->num_copies());
-}
-
-// This allocator is similar to std::pmr::polymorphic_allocator.
-// Note the disabled assignment.
-template <class T>
-class PAlloc {
-  template <class>
-  friend class PAlloc;
-
- public:
-  // types
-  using value_type = T;
-
-  // traits
-  using propagate_on_container_swap = std::false_type;
-
-  PAlloc() noexcept = default;
-  explicit PAlloc(size_t id) noexcept : id_(id) {}
-  PAlloc(const PAlloc&) noexcept = default;
-  PAlloc& operator=(const PAlloc&) noexcept = delete;
-
-  template <class U>
-  PAlloc(const PAlloc<U>& that) noexcept : id_(that.id_) {}  // NOLINT
-
-  template <class U>
-  struct rebind {
-    using other = PAlloc<U>;
-  };
-
-  constexpr PAlloc select_on_container_copy_construction() const { return {}; }
-
-  // public member functions
-  T* allocate(size_t) { return new T; }
-  void deallocate(T* p, size_t) { delete p; }
-
-  friend bool operator==(const PAlloc& a, const PAlloc& b) {
-    return a.id_ == b.id_;
-  }
-  friend bool operator!=(const PAlloc& a, const PAlloc& b) { return !(a == b); }
-
- private:
-  size_t id_ = std::numeric_limits<size_t>::max();
-};
-
-// This doesn't compile with GCC 5.4 and 5.5 due to a bug in noexcept handing.
-#if !defined(__GNUC__) || __GNUC__ != 5 || (__GNUC_MINOR__ != 4 && \
-    __GNUC_MINOR__ != 5)
-TEST(NoPropagateOn, Swap) {
-  using PA = PAlloc<char>;
-  using Table = raw_hash_set<Policy, Identity, std::equal_to<int32_t>, PA>;
-
-  Table t1(PA{1}), t2(PA{2});
-  swap(t1, t2);
-  EXPECT_EQ(t1.get_allocator(), PA(1));
-  EXPECT_EQ(t2.get_allocator(), PA(2));
-}
-#endif
-
-TEST(NoPropagateOn, CopyConstruct) {
-  using PA = PAlloc<char>;
-  using Table = raw_hash_set<Policy, Identity, std::equal_to<int32_t>, PA>;
-
-  Table t1(PA{1}), t2(t1);
-  EXPECT_EQ(t1.get_allocator(), PA(1));
-  EXPECT_EQ(t2.get_allocator(), PA());
-}
-
-TEST(NoPropagateOn, Assignment) {
-  using PA = PAlloc<char>;
-  using Table = raw_hash_set<Policy, Identity, std::equal_to<int32_t>, PA>;
-
-  Table t1(PA{1}), t2(PA{2});
-  t1 = t2;
-  EXPECT_EQ(t1.get_allocator(), PA(1));
-  EXPECT_EQ(t2.get_allocator(), PA(2));
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/raw_hash_set_benchmark.cc b/third_party/abseil/absl/container/internal/raw_hash_set_benchmark.cc
deleted file mode 100644
index f9be2c5..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_set_benchmark.cc
+++ /dev/null
@@ -1,396 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/raw_hash_set.h"
-
-#include <numeric>
-#include <random>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/internal/hash_function_defaults.h"
-#include "absl/strings/str_format.h"
-#include "benchmark/benchmark.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-struct RawHashSetTestOnlyAccess {
-  template <typename C>
-  static auto GetSlots(const C& c) -> decltype(c.slots_) {
-    return c.slots_;
-  }
-};
-
-namespace {
-
-struct IntPolicy {
-  using slot_type = int64_t;
-  using key_type = int64_t;
-  using init_type = int64_t;
-
-  static void construct(void*, int64_t* slot, int64_t v) { *slot = v; }
-  static void destroy(void*, int64_t*) {}
-  static void transfer(void*, int64_t* new_slot, int64_t* old_slot) {
-    *new_slot = *old_slot;
-  }
-
-  static int64_t& element(slot_type* slot) { return *slot; }
-
-  template <class F>
-  static auto apply(F&& f, int64_t x) -> decltype(std::forward<F>(f)(x, x)) {
-    return std::forward<F>(f)(x, x);
-  }
-};
-
-class StringPolicy {
-  template <class F, class K, class V,
-            class = typename std::enable_if<
-                std::is_convertible<const K&, absl::string_view>::value>::type>
-  decltype(std::declval<F>()(
-      std::declval<const absl::string_view&>(), std::piecewise_construct,
-      std::declval<std::tuple<K>>(),
-      std::declval<V>())) static apply_impl(F&& f,
-                                            std::pair<std::tuple<K>, V> p) {
-    const absl::string_view& key = std::get<0>(p.first);
-    return std::forward<F>(f)(key, std::piecewise_construct, std::move(p.first),
-                              std::move(p.second));
-  }
-
- public:
-  struct slot_type {
-    struct ctor {};
-
-    template <class... Ts>
-    slot_type(ctor, Ts&&... ts) : pair(std::forward<Ts>(ts)...) {}
-
-    std::pair<std::string, std::string> pair;
-  };
-
-  using key_type = std::string;
-  using init_type = std::pair<std::string, std::string>;
-
-  template <class allocator_type, class... Args>
-  static void construct(allocator_type* alloc, slot_type* slot, Args... args) {
-    std::allocator_traits<allocator_type>::construct(
-        *alloc, slot, typename slot_type::ctor(), std::forward<Args>(args)...);
-  }
-
-  template <class allocator_type>
-  static void destroy(allocator_type* alloc, slot_type* slot) {
-    std::allocator_traits<allocator_type>::destroy(*alloc, slot);
-  }
-
-  template <class allocator_type>
-  static void transfer(allocator_type* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    construct(alloc, new_slot, std::move(old_slot->pair));
-    destroy(alloc, old_slot);
-  }
-
-  static std::pair<std::string, std::string>& element(slot_type* slot) {
-    return slot->pair;
-  }
-
-  template <class F, class... Args>
-  static auto apply(F&& f, Args&&... args)
-      -> decltype(apply_impl(std::forward<F>(f),
-                             PairArgs(std::forward<Args>(args)...))) {
-    return apply_impl(std::forward<F>(f),
-                      PairArgs(std::forward<Args>(args)...));
-  }
-};
-
-struct StringHash : container_internal::hash_default_hash<absl::string_view> {
-  using is_transparent = void;
-};
-struct StringEq : std::equal_to<absl::string_view> {
-  using is_transparent = void;
-};
-
-struct StringTable
-    : raw_hash_set<StringPolicy, StringHash, StringEq, std::allocator<int>> {
-  using Base = typename StringTable::raw_hash_set;
-  StringTable() {}
-  using Base::Base;
-};
-
-struct IntTable
-    : raw_hash_set<IntPolicy, container_internal::hash_default_hash<int64_t>,
-                   std::equal_to<int64_t>, std::allocator<int64_t>> {
-  using Base = typename IntTable::raw_hash_set;
-  IntTable() {}
-  using Base::Base;
-};
-
-struct string_generator {
-  template <class RNG>
-  std::string operator()(RNG& rng) const {
-    std::string res;
-    res.resize(12);
-    std::uniform_int_distribution<uint32_t> printable_ascii(0x20, 0x7E);
-    std::generate(res.begin(), res.end(), [&] { return printable_ascii(rng); });
-    return res;
-  }
-
-  size_t size;
-};
-
-// Model a cache in steady state.
-//
-// On a table of size N, keep deleting the LRU entry and add a random one.
-void BM_CacheInSteadyState(benchmark::State& state) {
-  std::random_device rd;
-  std::mt19937 rng(rd());
-  string_generator gen{12};
-  StringTable t;
-  std::deque<std::string> keys;
-  while (t.size() < state.range(0)) {
-    auto x = t.emplace(gen(rng), gen(rng));
-    if (x.second) keys.push_back(x.first->first);
-  }
-  ABSL_RAW_CHECK(state.range(0) >= 10, "");
-  while (state.KeepRunning()) {
-    // Some cache hits.
-    std::deque<std::string>::const_iterator it;
-    for (int i = 0; i != 90; ++i) {
-      if (i % 10 == 0) it = keys.end();
-      ::benchmark::DoNotOptimize(t.find(*--it));
-    }
-    // Some cache misses.
-    for (int i = 0; i != 10; ++i) ::benchmark::DoNotOptimize(t.find(gen(rng)));
-    ABSL_RAW_CHECK(t.erase(keys.front()), keys.front().c_str());
-    keys.pop_front();
-    while (true) {
-      auto x = t.emplace(gen(rng), gen(rng));
-      if (x.second) {
-        keys.push_back(x.first->first);
-        break;
-      }
-    }
-  }
-  state.SetItemsProcessed(state.iterations());
-  state.SetLabel(absl::StrFormat("load_factor=%.2f", t.load_factor()));
-}
-
-template <typename Benchmark>
-void CacheInSteadyStateArgs(Benchmark* bm) {
-  // The default.
-  const float max_load_factor = 0.875;
-  // When the cache is at the steady state, the probe sequence will equal
-  // capacity if there is no reclamation of deleted slots. Pick a number large
-  // enough to make the benchmark slow for that case.
-  const size_t capacity = 1 << 10;
-
-  // Check N data points to cover load factors in [0.4, 0.8).
-  const size_t kNumPoints = 10;
-  for (size_t i = 0; i != kNumPoints; ++i)
-    bm->Arg(std::ceil(
-        capacity * (max_load_factor + i * max_load_factor / kNumPoints) / 2));
-}
-BENCHMARK(BM_CacheInSteadyState)->Apply(CacheInSteadyStateArgs);
-
-void BM_EndComparison(benchmark::State& state) {
-  std::random_device rd;
-  std::mt19937 rng(rd());
-  string_generator gen{12};
-  StringTable t;
-  while (t.size() < state.range(0)) {
-    t.emplace(gen(rng), gen(rng));
-  }
-
-  for (auto _ : state) {
-    for (auto it = t.begin(); it != t.end(); ++it) {
-      benchmark::DoNotOptimize(it);
-      benchmark::DoNotOptimize(t);
-      benchmark::DoNotOptimize(it != t.end());
-    }
-  }
-}
-BENCHMARK(BM_EndComparison)->Arg(400);
-
-void BM_CopyCtor(benchmark::State& state) {
-  std::random_device rd;
-  std::mt19937 rng(rd());
-  IntTable t;
-  std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
-
-  while (t.size() < state.range(0)) {
-    t.emplace(dist(rng));
-  }
-
-  for (auto _ : state) {
-    IntTable t2 = t;
-    benchmark::DoNotOptimize(t2);
-  }
-}
-BENCHMARK(BM_CopyCtor)->Range(128, 4096);
-
-void BM_CopyAssign(benchmark::State& state) {
-  std::random_device rd;
-  std::mt19937 rng(rd());
-  IntTable t;
-  std::uniform_int_distribution<uint64_t> dist(0, ~uint64_t{});
-  while (t.size() < state.range(0)) {
-    t.emplace(dist(rng));
-  }
-
-  IntTable t2;
-  for (auto _ : state) {
-    t2 = t;
-    benchmark::DoNotOptimize(t2);
-  }
-}
-BENCHMARK(BM_CopyAssign)->Range(128, 4096);
-
-void BM_NoOpReserveIntTable(benchmark::State& state) {
-  IntTable t;
-  t.reserve(100000);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(t);
-    t.reserve(100000);
-  }
-}
-BENCHMARK(BM_NoOpReserveIntTable);
-
-void BM_NoOpReserveStringTable(benchmark::State& state) {
-  StringTable t;
-  t.reserve(100000);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(t);
-    t.reserve(100000);
-  }
-}
-BENCHMARK(BM_NoOpReserveStringTable);
-
-void BM_ReserveIntTable(benchmark::State& state) {
-  int reserve_size = state.range(0);
-  for (auto _ : state) {
-    state.PauseTiming();
-    IntTable t;
-    state.ResumeTiming();
-    benchmark::DoNotOptimize(t);
-    t.reserve(reserve_size);
-  }
-}
-BENCHMARK(BM_ReserveIntTable)->Range(128, 4096);
-
-void BM_ReserveStringTable(benchmark::State& state) {
-  int reserve_size = state.range(0);
-  for (auto _ : state) {
-    state.PauseTiming();
-    StringTable t;
-    state.ResumeTiming();
-    benchmark::DoNotOptimize(t);
-    t.reserve(reserve_size);
-  }
-}
-BENCHMARK(BM_ReserveStringTable)->Range(128, 4096);
-
-void BM_Group_Match(benchmark::State& state) {
-  std::array<ctrl_t, Group::kWidth> group;
-  std::iota(group.begin(), group.end(), -4);
-  Group g{group.data()};
-  h2_t h = 1;
-  for (auto _ : state) {
-    ::benchmark::DoNotOptimize(h);
-    ::benchmark::DoNotOptimize(g.Match(h));
-  }
-}
-BENCHMARK(BM_Group_Match);
-
-void BM_Group_MatchEmpty(benchmark::State& state) {
-  std::array<ctrl_t, Group::kWidth> group;
-  std::iota(group.begin(), group.end(), -4);
-  Group g{group.data()};
-  for (auto _ : state) ::benchmark::DoNotOptimize(g.MatchEmpty());
-}
-BENCHMARK(BM_Group_MatchEmpty);
-
-void BM_Group_MatchEmptyOrDeleted(benchmark::State& state) {
-  std::array<ctrl_t, Group::kWidth> group;
-  std::iota(group.begin(), group.end(), -4);
-  Group g{group.data()};
-  for (auto _ : state) ::benchmark::DoNotOptimize(g.MatchEmptyOrDeleted());
-}
-BENCHMARK(BM_Group_MatchEmptyOrDeleted);
-
-void BM_Group_CountLeadingEmptyOrDeleted(benchmark::State& state) {
-  std::array<ctrl_t, Group::kWidth> group;
-  std::iota(group.begin(), group.end(), -2);
-  Group g{group.data()};
-  for (auto _ : state)
-    ::benchmark::DoNotOptimize(g.CountLeadingEmptyOrDeleted());
-}
-BENCHMARK(BM_Group_CountLeadingEmptyOrDeleted);
-
-void BM_Group_MatchFirstEmptyOrDeleted(benchmark::State& state) {
-  std::array<ctrl_t, Group::kWidth> group;
-  std::iota(group.begin(), group.end(), -2);
-  Group g{group.data()};
-  for (auto _ : state) ::benchmark::DoNotOptimize(*g.MatchEmptyOrDeleted());
-}
-BENCHMARK(BM_Group_MatchFirstEmptyOrDeleted);
-
-void BM_DropDeletes(benchmark::State& state) {
-  constexpr size_t capacity = (1 << 20) - 1;
-  std::vector<ctrl_t> ctrl(capacity + 1 + Group::kWidth);
-  ctrl[capacity] = kSentinel;
-  std::vector<ctrl_t> pattern = {kEmpty, 2, kDeleted, 2, kEmpty, 1, kDeleted};
-  for (size_t i = 0; i != capacity; ++i) {
-    ctrl[i] = pattern[i % pattern.size()];
-  }
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    std::vector<ctrl_t> ctrl_copy = ctrl;
-    state.ResumeTiming();
-    ConvertDeletedToEmptyAndFullToDeleted(ctrl_copy.data(), capacity);
-    ::benchmark::DoNotOptimize(ctrl_copy[capacity]);
-  }
-}
-BENCHMARK(BM_DropDeletes);
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// These methods are here to make it easy to examine the assembly for targeted
-// parts of the API.
-auto CodegenAbslRawHashSetInt64Find(absl::container_internal::IntTable* table,
-                                    int64_t key) -> decltype(table->find(key)) {
-  return table->find(key);
-}
-
-bool CodegenAbslRawHashSetInt64FindNeEnd(
-    absl::container_internal::IntTable* table, int64_t key) {
-  return table->find(key) != table->end();
-}
-
-bool CodegenAbslRawHashSetInt64Contains(
-    absl::container_internal::IntTable* table, int64_t key) {
-  return table->contains(key);
-}
-
-void CodegenAbslRawHashSetInt64Iterate(
-    absl::container_internal::IntTable* table) {
-  for (auto x : *table) benchmark::DoNotOptimize(x);
-}
-
-int odr =
-    (::benchmark::DoNotOptimize(std::make_tuple(
-         &CodegenAbslRawHashSetInt64Find, &CodegenAbslRawHashSetInt64FindNeEnd,
-         &CodegenAbslRawHashSetInt64Contains,
-         &CodegenAbslRawHashSetInt64Iterate)),
-     1);
diff --git a/third_party/abseil/absl/container/internal/raw_hash_set_probe_benchmark.cc b/third_party/abseil/absl/container/internal/raw_hash_set_probe_benchmark.cc
deleted file mode 100644
index 7169a2e..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_set_probe_benchmark.cc
+++ /dev/null
@@ -1,590 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Generates probe length statistics for many combinations of key types and key
-// distributions, all using the default hash function for swisstable.
-
-#include <memory>
-#include <regex>  // NOLINT
-#include <vector>
-
-#include "absl/container/flat_hash_map.h"
-#include "absl/container/internal/hash_function_defaults.h"
-#include "absl/container/internal/hashtable_debug.h"
-#include "absl/container/internal/raw_hash_set.h"
-#include "absl/random/distributions.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-enum class OutputStyle { kRegular, kBenchmark };
-
-// The --benchmark command line flag.
-// This is populated from main().
-// When run in "benchmark" mode, we have different output. This allows
-// A/B comparisons with tools like `benchy`.
-absl::string_view benchmarks;
-
-OutputStyle output() {
-  return !benchmarks.empty() ? OutputStyle::kBenchmark : OutputStyle::kRegular;
-}
-
-template <class T>
-struct Policy {
-  using slot_type = T;
-  using key_type = T;
-  using init_type = T;
-
-  template <class allocator_type, class Arg>
-  static void construct(allocator_type* alloc, slot_type* slot,
-                        const Arg& arg) {
-    std::allocator_traits<allocator_type>::construct(*alloc, slot, arg);
-  }
-
-  template <class allocator_type>
-  static void destroy(allocator_type* alloc, slot_type* slot) {
-    std::allocator_traits<allocator_type>::destroy(*alloc, slot);
-  }
-
-  static slot_type& element(slot_type* slot) { return *slot; }
-
-  template <class F, class... Args>
-  static auto apply(F&& f, const slot_type& arg)
-      -> decltype(std::forward<F>(f)(arg, arg)) {
-    return std::forward<F>(f)(arg, arg);
-  }
-};
-
-absl::BitGen& GlobalBitGen() {
-  static auto* value = new absl::BitGen;
-  return *value;
-}
-
-// Keeps a pool of allocations and randomly gives one out.
-// This introduces more randomization to the addresses given to swisstable and
-// should help smooth out this factor from probe length calculation.
-template <class T>
-class RandomizedAllocator {
- public:
-  using value_type = T;
-
-  RandomizedAllocator() = default;
-  template <typename U>
-  RandomizedAllocator(RandomizedAllocator<U>) {}  // NOLINT
-
-  static T* allocate(size_t n) {
-    auto& pointers = GetPointers(n);
-    // Fill the pool
-    while (pointers.size() < kRandomPool) {
-      pointers.push_back(std::allocator<T>{}.allocate(n));
-    }
-
-    // Choose a random one.
-    size_t i = absl::Uniform<size_t>(GlobalBitGen(), 0, pointers.size());
-    T* result = pointers[i];
-    pointers[i] = pointers.back();
-    pointers.pop_back();
-    return result;
-  }
-
-  static void deallocate(T* p, size_t n) {
-    // Just put it back on the pool. No need to release the memory.
-    GetPointers(n).push_back(p);
-  }
-
- private:
-  // We keep at least kRandomPool allocations for each size.
-  static constexpr size_t kRandomPool = 20;
-
-  static std::vector<T*>& GetPointers(size_t n) {
-    static auto* m = new absl::flat_hash_map<size_t, std::vector<T*>>();
-    return (*m)[n];
-  }
-};
-
-template <class T>
-struct DefaultHash {
-  using type = absl::container_internal::hash_default_hash<T>;
-};
-
-template <class T>
-using DefaultHashT = typename DefaultHash<T>::type;
-
-template <class T>
-struct Table : absl::container_internal::raw_hash_set<
-                   Policy<T>, DefaultHashT<T>,
-                   absl::container_internal::hash_default_eq<T>,
-                   RandomizedAllocator<T>> {};
-
-struct LoadSizes {
-  size_t min_load;
-  size_t max_load;
-};
-
-LoadSizes GetMinMaxLoadSizes() {
-  static const auto sizes = [] {
-    Table<int> t;
-
-    // First, fill enough to have a good distribution.
-    constexpr size_t kMinSize = 10000;
-    while (t.size() < kMinSize) t.insert(t.size());
-
-    const auto reach_min_load_factor = [&] {
-      const double lf = t.load_factor();
-      while (lf <= t.load_factor()) t.insert(t.size());
-    };
-
-    // Then, insert until we reach min load factor.
-    reach_min_load_factor();
-    const size_t min_load_size = t.size();
-
-    // Keep going until we hit min load factor again, then go back one.
-    t.insert(t.size());
-    reach_min_load_factor();
-
-    return LoadSizes{min_load_size, t.size() - 1};
-  }();
-  return sizes;
-}
-
-struct Ratios {
-  double min_load;
-  double avg_load;
-  double max_load;
-};
-
-// See absl/container/internal/hashtable_debug.h for details on
-// probe length calculation.
-template <class ElemFn>
-Ratios CollectMeanProbeLengths() {
-  const auto min_max_sizes = GetMinMaxLoadSizes();
-
-  ElemFn elem;
-  using Key = decltype(elem());
-  Table<Key> t;
-
-  Ratios result;
-  while (t.size() < min_max_sizes.min_load) t.insert(elem());
-  result.min_load =
-      absl::container_internal::GetHashtableDebugProbeSummary(t).mean;
-
-  while (t.size() < (min_max_sizes.min_load + min_max_sizes.max_load) / 2)
-    t.insert(elem());
-  result.avg_load =
-      absl::container_internal::GetHashtableDebugProbeSummary(t).mean;
-
-  while (t.size() < min_max_sizes.max_load) t.insert(elem());
-  result.max_load =
-      absl::container_internal::GetHashtableDebugProbeSummary(t).mean;
-
-  return result;
-}
-
-template <int Align>
-uintptr_t PointerForAlignment() {
-  alignas(Align) static constexpr uintptr_t kInitPointer = 0;
-  return reinterpret_cast<uintptr_t>(&kInitPointer);
-}
-
-// This incomplete type is used for testing hash of pointers of different
-// alignments.
-// NOTE: We are generating invalid pointer values on the fly with
-// reinterpret_cast. There are not "safely derived" pointers so using them is
-// technically UB. It is unlikely to be a problem, though.
-template <int Align>
-struct Ptr;
-
-template <int Align>
-Ptr<Align>* MakePtr(uintptr_t v) {
-  if (sizeof(v) == 8) {
-    constexpr int kCopyBits = 16;
-    // Ensure high bits are all the same.
-    v = static_cast<uintptr_t>(static_cast<intptr_t>(v << kCopyBits) >>
-                               kCopyBits);
-  }
-  return reinterpret_cast<Ptr<Align>*>(v);
-}
-
-struct IntIdentity {
-  uint64_t i;
-  friend bool operator==(IntIdentity a, IntIdentity b) { return a.i == b.i; }
-  IntIdentity operator++(int) { return IntIdentity{i++}; }
-};
-
-template <int Align>
-struct PtrIdentity {
-  explicit PtrIdentity(uintptr_t val = PointerForAlignment<Align>()) : i(val) {}
-  uintptr_t i;
-  friend bool operator==(PtrIdentity a, PtrIdentity b) { return a.i == b.i; }
-  PtrIdentity operator++(int) {
-    PtrIdentity p(i);
-    i += Align;
-    return p;
-  }
-};
-
-constexpr char kStringFormat[] = "/path/to/file/name-%07d-of-9999999.txt";
-
-template <bool small>
-struct String {
-  std::string value;
-  static std::string Make(uint32_t v) {
-    return {small ? absl::StrCat(v) : absl::StrFormat(kStringFormat, v)};
-  }
-};
-
-template <>
-struct DefaultHash<IntIdentity> {
-  struct type {
-    size_t operator()(IntIdentity t) const { return t.i; }
-  };
-};
-
-template <int Align>
-struct DefaultHash<PtrIdentity<Align>> {
-  struct type {
-    size_t operator()(PtrIdentity<Align> t) const { return t.i; }
-  };
-};
-
-template <class T>
-struct Sequential {
-  T operator()() const { return current++; }
-  mutable T current{};
-};
-
-template <int Align>
-struct Sequential<Ptr<Align>*> {
-  Ptr<Align>* operator()() const {
-    auto* result = MakePtr<Align>(current);
-    current += Align;
-    return result;
-  }
-  mutable uintptr_t current = PointerForAlignment<Align>();
-};
-
-
-template <bool small>
-struct Sequential<String<small>> {
-  std::string operator()() const { return String<small>::Make(current++); }
-  mutable uint32_t current = 0;
-};
-
-template <class T, class U>
-struct Sequential<std::pair<T, U>> {
-  mutable Sequential<T> tseq;
-  mutable Sequential<U> useq;
-
-  using RealT = decltype(tseq());
-  using RealU = decltype(useq());
-
-  mutable std::vector<RealT> ts;
-  mutable std::vector<RealU> us;
-  mutable size_t ti = 0, ui = 0;
-
-  std::pair<RealT, RealU> operator()() const {
-    std::pair<RealT, RealU> value{get_t(), get_u()};
-    if (ti == 0) {
-      ti = ui + 1;
-      ui = 0;
-    } else {
-      --ti;
-      ++ui;
-    }
-    return value;
-  }
-
-  RealT get_t() const {
-    while (ti >= ts.size()) ts.push_back(tseq());
-    return ts[ti];
-  }
-
-  RealU get_u() const {
-    while (ui >= us.size()) us.push_back(useq());
-    return us[ui];
-  }
-};
-
-template <class T, int percent_skip>
-struct AlmostSequential {
-  mutable Sequential<T> current;
-
-  auto operator()() const -> decltype(current()) {
-    while (absl::Uniform(GlobalBitGen(), 0.0, 1.0) <= percent_skip / 100.)
-      current();
-    return current();
-  }
-};
-
-struct Uniform {
-  template <typename T>
-  T operator()(T) const {
-    return absl::Uniform<T>(absl::IntervalClosed, GlobalBitGen(), T{0}, ~T{0});
-  }
-};
-
-struct Gaussian {
-  template <typename T>
-  T operator()(T) const {
-    double d;
-    do {
-      d = absl::Gaussian<double>(GlobalBitGen(), 1e6, 1e4);
-    } while (d <= 0 || d > std::numeric_limits<T>::max() / 2);
-    return static_cast<T>(d);
-  }
-};
-
-struct Zipf {
-  template <typename T>
-  T operator()(T) const {
-    return absl::Zipf<T>(GlobalBitGen(), std::numeric_limits<T>::max(), 1.6);
-  }
-};
-
-template <class T, class Dist>
-struct Random {
-  T operator()() const { return Dist{}(T{}); }
-};
-
-template <class Dist, int Align>
-struct Random<Ptr<Align>*, Dist> {
-  Ptr<Align>* operator()() const {
-    return MakePtr<Align>(Random<uintptr_t, Dist>{}() * Align);
-  }
-};
-
-template <class Dist>
-struct Random<IntIdentity, Dist> {
-  IntIdentity operator()() const {
-    return IntIdentity{Random<uint64_t, Dist>{}()};
-  }
-};
-
-template <class Dist, int Align>
-struct Random<PtrIdentity<Align>, Dist> {
-  PtrIdentity<Align> operator()() const {
-    return PtrIdentity<Align>{Random<uintptr_t, Dist>{}() * Align};
-  }
-};
-
-template <class Dist, bool small>
-struct Random<String<small>, Dist> {
-  std::string operator()() const {
-    return String<small>::Make(Random<uint32_t, Dist>{}());
-  }
-};
-
-template <class T, class U, class Dist>
-struct Random<std::pair<T, U>, Dist> {
-  auto operator()() const
-      -> decltype(std::make_pair(Random<T, Dist>{}(), Random<U, Dist>{}())) {
-    return std::make_pair(Random<T, Dist>{}(), Random<U, Dist>{}());
-  }
-};
-
-template <typename>
-std::string Name();
-
-std::string Name(uint32_t*) { return "u32"; }
-std::string Name(uint64_t*) { return "u64"; }
-std::string Name(IntIdentity*) { return "IntIdentity"; }
-
-template <int Align>
-std::string Name(Ptr<Align>**) {
-  return absl::StrCat("Ptr", Align);
-}
-
-template <int Align>
-std::string Name(PtrIdentity<Align>*) {
-  return absl::StrCat("PtrIdentity", Align);
-}
-
-template <bool small>
-std::string Name(String<small>*) {
-  return small ? "StrS" : "StrL";
-}
-
-template <class T, class U>
-std::string Name(std::pair<T, U>*) {
-  if (output() == OutputStyle::kBenchmark)
-    return absl::StrCat("P_", Name<T>(), "_", Name<U>());
-  return absl::StrCat("P<", Name<T>(), ",", Name<U>(), ">");
-}
-
-template <class T>
-std::string Name(Sequential<T>*) {
-  return "Sequential";
-}
-
-template <class T, int P>
-std::string Name(AlmostSequential<T, P>*) {
-  return absl::StrCat("AlmostSeq_", P);
-}
-
-template <class T>
-std::string Name(Random<T, Uniform>*) {
-  return "UnifRand";
-}
-
-template <class T>
-std::string Name(Random<T, Gaussian>*) {
-  return "GausRand";
-}
-
-template <class T>
-std::string Name(Random<T, Zipf>*) {
-  return "ZipfRand";
-}
-
-template <typename T>
-std::string Name() {
-  return Name(static_cast<T*>(nullptr));
-}
-
-constexpr int kNameWidth = 15;
-constexpr int kDistWidth = 16;
-
-bool CanRunBenchmark(absl::string_view name) {
-  static std::regex* const filter = []() -> std::regex* {
-    return benchmarks.empty() || benchmarks == "all"
-               ? nullptr
-               : new std::regex(std::string(benchmarks));
-  }();
-  return filter == nullptr || std::regex_search(std::string(name), *filter);
-}
-
-struct Result {
-  std::string name;
-  std::string dist_name;
-  Ratios ratios;
-};
-
-template <typename T, typename Dist>
-void RunForTypeAndDistribution(std::vector<Result>& results) {
-  std::string name = absl::StrCat(Name<T>(), "/", Name<Dist>());
-  // We have to check against all three names (min/avg/max) before we run it.
-  // If any of them is enabled, we run it.
-  if (!CanRunBenchmark(absl::StrCat(name, "/min")) &&
-      !CanRunBenchmark(absl::StrCat(name, "/avg")) &&
-      !CanRunBenchmark(absl::StrCat(name, "/max"))) {
-    return;
-  }
-  results.push_back({Name<T>(), Name<Dist>(), CollectMeanProbeLengths<Dist>()});
-}
-
-template <class T>
-void RunForType(std::vector<Result>& results) {
-  RunForTypeAndDistribution<T, Sequential<T>>(results);
-  RunForTypeAndDistribution<T, AlmostSequential<T, 20>>(results);
-  RunForTypeAndDistribution<T, AlmostSequential<T, 50>>(results);
-  RunForTypeAndDistribution<T, Random<T, Uniform>>(results);
-#ifdef NDEBUG
-  // Disable these in non-opt mode because they take too long.
-  RunForTypeAndDistribution<T, Random<T, Gaussian>>(results);
-  RunForTypeAndDistribution<T, Random<T, Zipf>>(results);
-#endif  // NDEBUG
-}
-
-}  // namespace
-
-int main(int argc, char** argv) {
-  // Parse the benchmark flags. Ignore all of them except the regex pattern.
-  for (int i = 1; i < argc; ++i) {
-    absl::string_view arg = argv[i];
-    const auto next = [&] { return argv[std::min(i + 1, argc - 1)]; };
-
-    if (absl::ConsumePrefix(&arg, "--benchmark_filter")) {
-      if (arg == "") {
-        // --benchmark_filter X
-        benchmarks = next();
-      } else if (absl::ConsumePrefix(&arg, "=")) {
-        // --benchmark_filter=X
-        benchmarks = arg;
-      }
-    }
-
-    // Any --benchmark flag turns on the mode.
-    if (absl::ConsumePrefix(&arg, "--benchmark")) {
-      if (benchmarks.empty()) benchmarks="all";
-    }
-  }
-
-  std::vector<Result> results;
-  RunForType<uint64_t>(results);
-  RunForType<IntIdentity>(results);
-  RunForType<Ptr<8>*>(results);
-  RunForType<Ptr<16>*>(results);
-  RunForType<Ptr<32>*>(results);
-  RunForType<Ptr<64>*>(results);
-  RunForType<PtrIdentity<8>>(results);
-  RunForType<PtrIdentity<16>>(results);
-  RunForType<PtrIdentity<32>>(results);
-  RunForType<PtrIdentity<64>>(results);
-  RunForType<std::pair<uint32_t, uint32_t>>(results);
-  RunForType<String<true>>(results);
-  RunForType<String<false>>(results);
-  RunForType<std::pair<uint64_t, String<true>>>(results);
-  RunForType<std::pair<String<true>, uint64_t>>(results);
-  RunForType<std::pair<uint64_t, String<false>>>(results);
-  RunForType<std::pair<String<false>, uint64_t>>(results);
-
-  switch (output()) {
-    case OutputStyle::kRegular:
-      absl::PrintF("%-*s%-*s       Min       Avg       Max\n%s\n", kNameWidth,
-                   "Type", kDistWidth, "Distribution",
-                   std::string(kNameWidth + kDistWidth + 10 * 3, '-'));
-      for (const auto& result : results) {
-        absl::PrintF("%-*s%-*s  %8.4f  %8.4f  %8.4f\n", kNameWidth, result.name,
-                     kDistWidth, result.dist_name, result.ratios.min_load,
-                     result.ratios.avg_load, result.ratios.max_load);
-      }
-      break;
-    case OutputStyle::kBenchmark: {
-      absl::PrintF("{\n");
-      absl::PrintF("  \"benchmarks\": [\n");
-      absl::string_view comma;
-      for (const auto& result : results) {
-        auto print = [&](absl::string_view stat, double Ratios::*val) {
-          std::string name =
-              absl::StrCat(result.name, "/", result.dist_name, "/", stat);
-          // Check the regex again. We might had have enabled only one of the
-          // stats for the benchmark.
-          if (!CanRunBenchmark(name)) return;
-          absl::PrintF("    %s{\n", comma);
-          absl::PrintF("      \"cpu_time\": %f,\n", 1e9 * result.ratios.*val);
-          absl::PrintF("      \"real_time\": %f,\n", 1e9 * result.ratios.*val);
-          absl::PrintF("      \"iterations\": 1,\n");
-          absl::PrintF("      \"name\": \"%s\",\n", name);
-          absl::PrintF("      \"time_unit\": \"ns\"\n");
-          absl::PrintF("    }\n");
-          comma = ",";
-        };
-        print("min", &Ratios::min_load);
-        print("avg", &Ratios::avg_load);
-        print("max", &Ratios::max_load);
-      }
-      absl::PrintF("  ],\n");
-      absl::PrintF("  \"context\": {\n");
-      absl::PrintF("  }\n");
-      absl::PrintF("}\n");
-      break;
-    }
-  }
-
-  return 0;
-}
diff --git a/third_party/abseil/absl/container/internal/raw_hash_set_test.cc b/third_party/abseil/absl/container/internal/raw_hash_set_test.cc
deleted file mode 100644
index 0fba46f..0000000
--- a/third_party/abseil/absl/container/internal/raw_hash_set_test.cc
+++ /dev/null
@@ -1,1943 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/raw_hash_set.h"
-
-#include <cmath>
-#include <cstdint>
-#include <deque>
-#include <functional>
-#include <memory>
-#include <numeric>
-#include <random>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/cycleclock.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/hash_function_defaults.h"
-#include "absl/container/internal/hash_policy_testing.h"
-#include "absl/container/internal/hashtable_debug.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-struct RawHashSetTestOnlyAccess {
-  template <typename C>
-  static auto GetSlots(const C& c) -> decltype(c.slots_) {
-    return c.slots_;
-  }
-};
-
-namespace {
-
-using ::testing::DoubleNear;
-using ::testing::ElementsAre;
-using ::testing::Ge;
-using ::testing::Lt;
-using ::testing::Optional;
-using ::testing::Pair;
-using ::testing::UnorderedElementsAre;
-
-TEST(Util, NormalizeCapacity) {
-  EXPECT_EQ(1, NormalizeCapacity(0));
-  EXPECT_EQ(1, NormalizeCapacity(1));
-  EXPECT_EQ(3, NormalizeCapacity(2));
-  EXPECT_EQ(3, NormalizeCapacity(3));
-  EXPECT_EQ(7, NormalizeCapacity(4));
-  EXPECT_EQ(7, NormalizeCapacity(7));
-  EXPECT_EQ(15, NormalizeCapacity(8));
-  EXPECT_EQ(15, NormalizeCapacity(15));
-  EXPECT_EQ(15 * 2 + 1, NormalizeCapacity(15 + 1));
-  EXPECT_EQ(15 * 2 + 1, NormalizeCapacity(15 + 2));
-}
-
-TEST(Util, GrowthAndCapacity) {
-  // Verify that GrowthToCapacity gives the minimum capacity that has enough
-  // growth.
-  for (size_t growth = 0; growth < 10000; ++growth) {
-    SCOPED_TRACE(growth);
-    size_t capacity = NormalizeCapacity(GrowthToLowerboundCapacity(growth));
-    // The capacity is large enough for `growth`
-    EXPECT_THAT(CapacityToGrowth(capacity), Ge(growth));
-    if (growth != 0 && capacity > 1) {
-      // There is no smaller capacity that works.
-      EXPECT_THAT(CapacityToGrowth(capacity / 2), Lt(growth));
-    }
-  }
-
-  for (size_t capacity = Group::kWidth - 1; capacity < 10000;
-       capacity = 2 * capacity + 1) {
-    SCOPED_TRACE(capacity);
-    size_t growth = CapacityToGrowth(capacity);
-    EXPECT_THAT(growth, Lt(capacity));
-    EXPECT_LE(GrowthToLowerboundCapacity(growth), capacity);
-    EXPECT_EQ(NormalizeCapacity(GrowthToLowerboundCapacity(growth)), capacity);
-  }
-}
-
-TEST(Util, probe_seq) {
-  probe_seq<16> seq(0, 127);
-  auto gen = [&]() {
-    size_t res = seq.offset();
-    seq.next();
-    return res;
-  };
-  std::vector<size_t> offsets(8);
-  std::generate_n(offsets.begin(), 8, gen);
-  EXPECT_THAT(offsets, ElementsAre(0, 16, 48, 96, 32, 112, 80, 64));
-  seq = probe_seq<16>(128, 127);
-  std::generate_n(offsets.begin(), 8, gen);
-  EXPECT_THAT(offsets, ElementsAre(0, 16, 48, 96, 32, 112, 80, 64));
-}
-
-TEST(BitMask, Smoke) {
-  EXPECT_FALSE((BitMask<uint8_t, 8>(0)));
-  EXPECT_TRUE((BitMask<uint8_t, 8>(5)));
-
-  EXPECT_THAT((BitMask<uint8_t, 8>(0)), ElementsAre());
-  EXPECT_THAT((BitMask<uint8_t, 8>(0x1)), ElementsAre(0));
-  EXPECT_THAT((BitMask<uint8_t, 8>(0x2)), ElementsAre(1));
-  EXPECT_THAT((BitMask<uint8_t, 8>(0x3)), ElementsAre(0, 1));
-  EXPECT_THAT((BitMask<uint8_t, 8>(0x4)), ElementsAre(2));
-  EXPECT_THAT((BitMask<uint8_t, 8>(0x5)), ElementsAre(0, 2));
-  EXPECT_THAT((BitMask<uint8_t, 8>(0x55)), ElementsAre(0, 2, 4, 6));
-  EXPECT_THAT((BitMask<uint8_t, 8>(0xAA)), ElementsAre(1, 3, 5, 7));
-}
-
-TEST(BitMask, WithShift) {
-  // See the non-SSE version of Group for details on what this math is for.
-  uint64_t ctrl = 0x1716151413121110;
-  uint64_t hash = 0x12;
-  constexpr uint64_t msbs = 0x8080808080808080ULL;
-  constexpr uint64_t lsbs = 0x0101010101010101ULL;
-  auto x = ctrl ^ (lsbs * hash);
-  uint64_t mask = (x - lsbs) & ~x & msbs;
-  EXPECT_EQ(0x0000000080800000, mask);
-
-  BitMask<uint64_t, 8, 3> b(mask);
-  EXPECT_EQ(*b, 2);
-}
-
-TEST(BitMask, LeadingTrailing) {
-  EXPECT_EQ((BitMask<uint32_t, 16>(0x00001a40).LeadingZeros()), 3);
-  EXPECT_EQ((BitMask<uint32_t, 16>(0x00001a40).TrailingZeros()), 6);
-
-  EXPECT_EQ((BitMask<uint32_t, 16>(0x00000001).LeadingZeros()), 15);
-  EXPECT_EQ((BitMask<uint32_t, 16>(0x00000001).TrailingZeros()), 0);
-
-  EXPECT_EQ((BitMask<uint32_t, 16>(0x00008000).LeadingZeros()), 0);
-  EXPECT_EQ((BitMask<uint32_t, 16>(0x00008000).TrailingZeros()), 15);
-
-  EXPECT_EQ((BitMask<uint64_t, 8, 3>(0x0000008080808000).LeadingZeros()), 3);
-  EXPECT_EQ((BitMask<uint64_t, 8, 3>(0x0000008080808000).TrailingZeros()), 1);
-
-  EXPECT_EQ((BitMask<uint64_t, 8, 3>(0x0000000000000080).LeadingZeros()), 7);
-  EXPECT_EQ((BitMask<uint64_t, 8, 3>(0x0000000000000080).TrailingZeros()), 0);
-
-  EXPECT_EQ((BitMask<uint64_t, 8, 3>(0x8000000000000000).LeadingZeros()), 0);
-  EXPECT_EQ((BitMask<uint64_t, 8, 3>(0x8000000000000000).TrailingZeros()), 7);
-}
-
-TEST(Group, EmptyGroup) {
-  for (h2_t h = 0; h != 128; ++h) EXPECT_FALSE(Group{EmptyGroup()}.Match(h));
-}
-
-TEST(Group, Match) {
-  if (Group::kWidth == 16) {
-    ctrl_t group[] = {kEmpty, 1, kDeleted, 3, kEmpty, 5, kSentinel, 7,
-                      7,      5, 3,        1, 1,      1, 1,         1};
-    EXPECT_THAT(Group{group}.Match(0), ElementsAre());
-    EXPECT_THAT(Group{group}.Match(1), ElementsAre(1, 11, 12, 13, 14, 15));
-    EXPECT_THAT(Group{group}.Match(3), ElementsAre(3, 10));
-    EXPECT_THAT(Group{group}.Match(5), ElementsAre(5, 9));
-    EXPECT_THAT(Group{group}.Match(7), ElementsAre(7, 8));
-  } else if (Group::kWidth == 8) {
-    ctrl_t group[] = {kEmpty, 1, 2, kDeleted, 2, 1, kSentinel, 1};
-    EXPECT_THAT(Group{group}.Match(0), ElementsAre());
-    EXPECT_THAT(Group{group}.Match(1), ElementsAre(1, 5, 7));
-    EXPECT_THAT(Group{group}.Match(2), ElementsAre(2, 4));
-  } else {
-    FAIL() << "No test coverage for Group::kWidth==" << Group::kWidth;
-  }
-}
-
-TEST(Group, MatchEmpty) {
-  if (Group::kWidth == 16) {
-    ctrl_t group[] = {kEmpty, 1, kDeleted, 3, kEmpty, 5, kSentinel, 7,
-                      7,      5, 3,        1, 1,      1, 1,         1};
-    EXPECT_THAT(Group{group}.MatchEmpty(), ElementsAre(0, 4));
-  } else if (Group::kWidth == 8) {
-    ctrl_t group[] = {kEmpty, 1, 2, kDeleted, 2, 1, kSentinel, 1};
-    EXPECT_THAT(Group{group}.MatchEmpty(), ElementsAre(0));
-  } else {
-    FAIL() << "No test coverage for Group::kWidth==" << Group::kWidth;
-  }
-}
-
-TEST(Group, MatchEmptyOrDeleted) {
-  if (Group::kWidth == 16) {
-    ctrl_t group[] = {kEmpty, 1, kDeleted, 3, kEmpty, 5, kSentinel, 7,
-                      7,      5, 3,        1, 1,      1, 1,         1};
-    EXPECT_THAT(Group{group}.MatchEmptyOrDeleted(), ElementsAre(0, 2, 4));
-  } else if (Group::kWidth == 8) {
-    ctrl_t group[] = {kEmpty, 1, 2, kDeleted, 2, 1, kSentinel, 1};
-    EXPECT_THAT(Group{group}.MatchEmptyOrDeleted(), ElementsAre(0, 3));
-  } else {
-    FAIL() << "No test coverage for Group::kWidth==" << Group::kWidth;
-  }
-}
-
-TEST(Batch, DropDeletes) {
-  constexpr size_t kCapacity = 63;
-  constexpr size_t kGroupWidth = container_internal::Group::kWidth;
-  std::vector<ctrl_t> ctrl(kCapacity + 1 + kGroupWidth);
-  ctrl[kCapacity] = kSentinel;
-  std::vector<ctrl_t> pattern = {kEmpty, 2, kDeleted, 2, kEmpty, 1, kDeleted};
-  for (size_t i = 0; i != kCapacity; ++i) {
-    ctrl[i] = pattern[i % pattern.size()];
-    if (i < kGroupWidth - 1)
-      ctrl[i + kCapacity + 1] = pattern[i % pattern.size()];
-  }
-  ConvertDeletedToEmptyAndFullToDeleted(ctrl.data(), kCapacity);
-  ASSERT_EQ(ctrl[kCapacity], kSentinel);
-  for (size_t i = 0; i < kCapacity + 1 + kGroupWidth; ++i) {
-    ctrl_t expected = pattern[i % (kCapacity + 1) % pattern.size()];
-    if (i == kCapacity) expected = kSentinel;
-    if (expected == kDeleted) expected = kEmpty;
-    if (IsFull(expected)) expected = kDeleted;
-    EXPECT_EQ(ctrl[i], expected)
-        << i << " " << int{pattern[i % pattern.size()]};
-  }
-}
-
-TEST(Group, CountLeadingEmptyOrDeleted) {
-  const std::vector<ctrl_t> empty_examples = {kEmpty, kDeleted};
-  const std::vector<ctrl_t> full_examples = {0, 1, 2, 3, 5, 9, 127, kSentinel};
-
-  for (ctrl_t empty : empty_examples) {
-    std::vector<ctrl_t> e(Group::kWidth, empty);
-    EXPECT_EQ(Group::kWidth, Group{e.data()}.CountLeadingEmptyOrDeleted());
-    for (ctrl_t full : full_examples) {
-      for (size_t i = 0; i != Group::kWidth; ++i) {
-        std::vector<ctrl_t> f(Group::kWidth, empty);
-        f[i] = full;
-        EXPECT_EQ(i, Group{f.data()}.CountLeadingEmptyOrDeleted());
-      }
-      std::vector<ctrl_t> f(Group::kWidth, empty);
-      f[Group::kWidth * 2 / 3] = full;
-      f[Group::kWidth / 2] = full;
-      EXPECT_EQ(
-          Group::kWidth / 2, Group{f.data()}.CountLeadingEmptyOrDeleted());
-    }
-  }
-}
-
-template <class T>
-struct ValuePolicy {
-  using slot_type = T;
-  using key_type = T;
-  using init_type = T;
-
-  template <class Allocator, class... Args>
-  static void construct(Allocator* alloc, slot_type* slot, Args&&... args) {
-    absl::allocator_traits<Allocator>::construct(*alloc, slot,
-                                                 std::forward<Args>(args)...);
-  }
-
-  template <class Allocator>
-  static void destroy(Allocator* alloc, slot_type* slot) {
-    absl::allocator_traits<Allocator>::destroy(*alloc, slot);
-  }
-
-  template <class Allocator>
-  static void transfer(Allocator* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    construct(alloc, new_slot, std::move(*old_slot));
-    destroy(alloc, old_slot);
-  }
-
-  static T& element(slot_type* slot) { return *slot; }
-
-  template <class F, class... Args>
-  static decltype(absl::container_internal::DecomposeValue(
-      std::declval<F>(), std::declval<Args>()...))
-  apply(F&& f, Args&&... args) {
-    return absl::container_internal::DecomposeValue(
-        std::forward<F>(f), std::forward<Args>(args)...);
-  }
-};
-
-using IntPolicy = ValuePolicy<int64_t>;
-
-class StringPolicy {
-  template <class F, class K, class V,
-            class = typename std::enable_if<
-                std::is_convertible<const K&, absl::string_view>::value>::type>
-  decltype(std::declval<F>()(
-      std::declval<const absl::string_view&>(), std::piecewise_construct,
-      std::declval<std::tuple<K>>(),
-      std::declval<V>())) static apply_impl(F&& f,
-                                            std::pair<std::tuple<K>, V> p) {
-    const absl::string_view& key = std::get<0>(p.first);
-    return std::forward<F>(f)(key, std::piecewise_construct, std::move(p.first),
-                              std::move(p.second));
-  }
-
- public:
-  struct slot_type {
-    struct ctor {};
-
-    template <class... Ts>
-    slot_type(ctor, Ts&&... ts) : pair(std::forward<Ts>(ts)...) {}
-
-    std::pair<std::string, std::string> pair;
-  };
-
-  using key_type = std::string;
-  using init_type = std::pair<std::string, std::string>;
-
-  template <class allocator_type, class... Args>
-  static void construct(allocator_type* alloc, slot_type* slot, Args... args) {
-    std::allocator_traits<allocator_type>::construct(
-        *alloc, slot, typename slot_type::ctor(), std::forward<Args>(args)...);
-  }
-
-  template <class allocator_type>
-  static void destroy(allocator_type* alloc, slot_type* slot) {
-    std::allocator_traits<allocator_type>::destroy(*alloc, slot);
-  }
-
-  template <class allocator_type>
-  static void transfer(allocator_type* alloc, slot_type* new_slot,
-                       slot_type* old_slot) {
-    construct(alloc, new_slot, std::move(old_slot->pair));
-    destroy(alloc, old_slot);
-  }
-
-  static std::pair<std::string, std::string>& element(slot_type* slot) {
-    return slot->pair;
-  }
-
-  template <class F, class... Args>
-  static auto apply(F&& f, Args&&... args)
-      -> decltype(apply_impl(std::forward<F>(f),
-                             PairArgs(std::forward<Args>(args)...))) {
-    return apply_impl(std::forward<F>(f),
-                      PairArgs(std::forward<Args>(args)...));
-  }
-};
-
-struct StringHash : absl::Hash<absl::string_view> {
-  using is_transparent = void;
-};
-struct StringEq : std::equal_to<absl::string_view> {
-  using is_transparent = void;
-};
-
-struct StringTable
-    : raw_hash_set<StringPolicy, StringHash, StringEq, std::allocator<int>> {
-  using Base = typename StringTable::raw_hash_set;
-  StringTable() {}
-  using Base::Base;
-};
-
-struct IntTable
-    : raw_hash_set<IntPolicy, container_internal::hash_default_hash<int64_t>,
-                   std::equal_to<int64_t>, std::allocator<int64_t>> {
-  using Base = typename IntTable::raw_hash_set;
-  using Base::Base;
-};
-
-template <typename T>
-struct CustomAlloc : std::allocator<T> {
-  CustomAlloc() {}
-
-  template <typename U>
-  CustomAlloc(const CustomAlloc<U>& other) {}
-
-  template<class U> struct rebind {
-    using other = CustomAlloc<U>;
-  };
-};
-
-struct CustomAllocIntTable
-    : raw_hash_set<IntPolicy, container_internal::hash_default_hash<int64_t>,
-                   std::equal_to<int64_t>, CustomAlloc<int64_t>> {
-  using Base = typename CustomAllocIntTable::raw_hash_set;
-  using Base::Base;
-};
-
-struct BadFastHash {
-  template <class T>
-  size_t operator()(const T&) const {
-    return 0;
-  }
-};
-
-struct BadTable : raw_hash_set<IntPolicy, BadFastHash, std::equal_to<int>,
-                               std::allocator<int>> {
-  using Base = typename BadTable::raw_hash_set;
-  BadTable() {}
-  using Base::Base;
-};
-
-TEST(Table, EmptyFunctorOptimization) {
-  static_assert(std::is_empty<std::equal_to<absl::string_view>>::value, "");
-  static_assert(std::is_empty<std::allocator<int>>::value, "");
-
-  struct MockTable {
-    void* ctrl;
-    void* slots;
-    size_t size;
-    size_t capacity;
-    size_t growth_left;
-    void* infoz;
-  };
-  struct StatelessHash {
-    size_t operator()(absl::string_view) const { return 0; }
-  };
-  struct StatefulHash : StatelessHash {
-    size_t dummy;
-  };
-
-  EXPECT_EQ(
-      sizeof(MockTable),
-      sizeof(
-          raw_hash_set<StringPolicy, StatelessHash,
-                       std::equal_to<absl::string_view>, std::allocator<int>>));
-
-  EXPECT_EQ(
-      sizeof(MockTable) + sizeof(StatefulHash),
-      sizeof(
-          raw_hash_set<StringPolicy, StatefulHash,
-                       std::equal_to<absl::string_view>, std::allocator<int>>));
-}
-
-TEST(Table, Empty) {
-  IntTable t;
-  EXPECT_EQ(0, t.size());
-  EXPECT_TRUE(t.empty());
-}
-
-TEST(Table, LookupEmpty) {
-  IntTable t;
-  auto it = t.find(0);
-  EXPECT_TRUE(it == t.end());
-}
-
-TEST(Table, Insert1) {
-  IntTable t;
-  EXPECT_TRUE(t.find(0) == t.end());
-  auto res = t.emplace(0);
-  EXPECT_TRUE(res.second);
-  EXPECT_THAT(*res.first, 0);
-  EXPECT_EQ(1, t.size());
-  EXPECT_THAT(*t.find(0), 0);
-}
-
-TEST(Table, Insert2) {
-  IntTable t;
-  EXPECT_TRUE(t.find(0) == t.end());
-  auto res = t.emplace(0);
-  EXPECT_TRUE(res.second);
-  EXPECT_THAT(*res.first, 0);
-  EXPECT_EQ(1, t.size());
-  EXPECT_TRUE(t.find(1) == t.end());
-  res = t.emplace(1);
-  EXPECT_TRUE(res.second);
-  EXPECT_THAT(*res.first, 1);
-  EXPECT_EQ(2, t.size());
-  EXPECT_THAT(*t.find(0), 0);
-  EXPECT_THAT(*t.find(1), 1);
-}
-
-TEST(Table, InsertCollision) {
-  BadTable t;
-  EXPECT_TRUE(t.find(1) == t.end());
-  auto res = t.emplace(1);
-  EXPECT_TRUE(res.second);
-  EXPECT_THAT(*res.first, 1);
-  EXPECT_EQ(1, t.size());
-
-  EXPECT_TRUE(t.find(2) == t.end());
-  res = t.emplace(2);
-  EXPECT_THAT(*res.first, 2);
-  EXPECT_TRUE(res.second);
-  EXPECT_EQ(2, t.size());
-
-  EXPECT_THAT(*t.find(1), 1);
-  EXPECT_THAT(*t.find(2), 2);
-}
-
-// Test that we do not add existent element in case we need to search through
-// many groups with deleted elements
-TEST(Table, InsertCollisionAndFindAfterDelete) {
-  BadTable t;  // all elements go to the same group.
-  // Have at least 2 groups with Group::kWidth collisions
-  // plus some extra collisions in the last group.
-  constexpr size_t kNumInserts = Group::kWidth * 2 + 5;
-  for (size_t i = 0; i < kNumInserts; ++i) {
-    auto res = t.emplace(i);
-    EXPECT_TRUE(res.second);
-    EXPECT_THAT(*res.first, i);
-    EXPECT_EQ(i + 1, t.size());
-  }
-
-  // Remove elements one by one and check
-  // that we still can find all other elements.
-  for (size_t i = 0; i < kNumInserts; ++i) {
-    EXPECT_EQ(1, t.erase(i)) << i;
-    for (size_t j = i + 1; j < kNumInserts; ++j) {
-      EXPECT_THAT(*t.find(j), j);
-      auto res = t.emplace(j);
-      EXPECT_FALSE(res.second) << i << " " << j;
-      EXPECT_THAT(*res.first, j);
-      EXPECT_EQ(kNumInserts - i - 1, t.size());
-    }
-  }
-  EXPECT_TRUE(t.empty());
-}
-
-TEST(Table, LazyEmplace) {
-  StringTable t;
-  bool called = false;
-  auto it = t.lazy_emplace("abc", [&](const StringTable::constructor& f) {
-    called = true;
-    f("abc", "ABC");
-  });
-  EXPECT_TRUE(called);
-  EXPECT_THAT(*it, Pair("abc", "ABC"));
-  called = false;
-  it = t.lazy_emplace("abc", [&](const StringTable::constructor& f) {
-    called = true;
-    f("abc", "DEF");
-  });
-  EXPECT_FALSE(called);
-  EXPECT_THAT(*it, Pair("abc", "ABC"));
-}
-
-TEST(Table, ContainsEmpty) {
-  IntTable t;
-
-  EXPECT_FALSE(t.contains(0));
-}
-
-TEST(Table, Contains1) {
-  IntTable t;
-
-  EXPECT_TRUE(t.insert(0).second);
-  EXPECT_TRUE(t.contains(0));
-  EXPECT_FALSE(t.contains(1));
-
-  EXPECT_EQ(1, t.erase(0));
-  EXPECT_FALSE(t.contains(0));
-}
-
-TEST(Table, Contains2) {
-  IntTable t;
-
-  EXPECT_TRUE(t.insert(0).second);
-  EXPECT_TRUE(t.contains(0));
-  EXPECT_FALSE(t.contains(1));
-
-  t.clear();
-  EXPECT_FALSE(t.contains(0));
-}
-
-int decompose_constructed;
-struct DecomposeType {
-  DecomposeType(int i) : i(i) {  // NOLINT
-    ++decompose_constructed;
-  }
-
-  explicit DecomposeType(const char* d) : DecomposeType(*d) {}
-
-  int i;
-};
-
-struct DecomposeHash {
-  using is_transparent = void;
-  size_t operator()(DecomposeType a) const { return a.i; }
-  size_t operator()(int a) const { return a; }
-  size_t operator()(const char* a) const { return *a; }
-};
-
-struct DecomposeEq {
-  using is_transparent = void;
-  bool operator()(DecomposeType a, DecomposeType b) const { return a.i == b.i; }
-  bool operator()(DecomposeType a, int b) const { return a.i == b; }
-  bool operator()(DecomposeType a, const char* b) const { return a.i == *b; }
-};
-
-struct DecomposePolicy {
-  using slot_type = DecomposeType;
-  using key_type = DecomposeType;
-  using init_type = DecomposeType;
-
-  template <typename T>
-  static void construct(void*, DecomposeType* slot, T&& v) {
-    *slot = DecomposeType(std::forward<T>(v));
-  }
-  static void destroy(void*, DecomposeType*) {}
-  static DecomposeType& element(slot_type* slot) { return *slot; }
-
-  template <class F, class T>
-  static auto apply(F&& f, const T& x) -> decltype(std::forward<F>(f)(x, x)) {
-    return std::forward<F>(f)(x, x);
-  }
-};
-
-template <typename Hash, typename Eq>
-void TestDecompose(bool construct_three) {
-  DecomposeType elem{0};
-  const int one = 1;
-  const char* three_p = "3";
-  const auto& three = three_p;
-
-  raw_hash_set<DecomposePolicy, Hash, Eq, std::allocator<int>> set1;
-
-  decompose_constructed = 0;
-  int expected_constructed = 0;
-  EXPECT_EQ(expected_constructed, decompose_constructed);
-  set1.insert(elem);
-  EXPECT_EQ(expected_constructed, decompose_constructed);
-  set1.insert(1);
-  EXPECT_EQ(++expected_constructed, decompose_constructed);
-  set1.emplace("3");
-  EXPECT_EQ(++expected_constructed, decompose_constructed);
-  EXPECT_EQ(expected_constructed, decompose_constructed);
-
-  {  // insert(T&&)
-    set1.insert(1);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-  }
-
-  {  // insert(const T&)
-    set1.insert(one);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-  }
-
-  {  // insert(hint, T&&)
-    set1.insert(set1.begin(), 1);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-  }
-
-  {  // insert(hint, const T&)
-    set1.insert(set1.begin(), one);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-  }
-
-  {  // emplace(...)
-    set1.emplace(1);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-    set1.emplace("3");
-    expected_constructed += construct_three;
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-    set1.emplace(one);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-    set1.emplace(three);
-    expected_constructed += construct_three;
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-  }
-
-  {  // emplace_hint(...)
-    set1.emplace_hint(set1.begin(), 1);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-    set1.emplace_hint(set1.begin(), "3");
-    expected_constructed += construct_three;
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-    set1.emplace_hint(set1.begin(), one);
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-    set1.emplace_hint(set1.begin(), three);
-    expected_constructed += construct_three;
-    EXPECT_EQ(expected_constructed, decompose_constructed);
-  }
-}
-
-TEST(Table, Decompose) {
-  TestDecompose<DecomposeHash, DecomposeEq>(false);
-
-  struct TransparentHashIntOverload {
-    size_t operator()(DecomposeType a) const { return a.i; }
-    size_t operator()(int a) const { return a; }
-  };
-  struct TransparentEqIntOverload {
-    bool operator()(DecomposeType a, DecomposeType b) const {
-      return a.i == b.i;
-    }
-    bool operator()(DecomposeType a, int b) const { return a.i == b; }
-  };
-  TestDecompose<TransparentHashIntOverload, DecomposeEq>(true);
-  TestDecompose<TransparentHashIntOverload, TransparentEqIntOverload>(true);
-  TestDecompose<DecomposeHash, TransparentEqIntOverload>(true);
-}
-
-// Returns the largest m such that a table with m elements has the same number
-// of buckets as a table with n elements.
-size_t MaxDensitySize(size_t n) {
-  IntTable t;
-  t.reserve(n);
-  for (size_t i = 0; i != n; ++i) t.emplace(i);
-  const size_t c = t.bucket_count();
-  while (c == t.bucket_count()) t.emplace(n++);
-  return t.size() - 1;
-}
-
-struct Modulo1000Hash {
-  size_t operator()(int x) const { return x % 1000; }
-};
-
-struct Modulo1000HashTable
-    : public raw_hash_set<IntPolicy, Modulo1000Hash, std::equal_to<int>,
-                          std::allocator<int>> {};
-
-// Test that rehash with no resize happen in case of many deleted slots.
-TEST(Table, RehashWithNoResize) {
-  Modulo1000HashTable t;
-  // Adding the same length (and the same hash) strings
-  // to have at least kMinFullGroups groups
-  // with Group::kWidth collisions. Then fill up to MaxDensitySize;
-  const size_t kMinFullGroups = 7;
-  std::vector<int> keys;
-  for (size_t i = 0; i < MaxDensitySize(Group::kWidth * kMinFullGroups); ++i) {
-    int k = i * 1000;
-    t.emplace(k);
-    keys.push_back(k);
-  }
-  const size_t capacity = t.capacity();
-
-  // Remove elements from all groups except the first and the last one.
-  // All elements removed from full groups will be marked as kDeleted.
-  const size_t erase_begin = Group::kWidth / 2;
-  const size_t erase_end = (t.size() / Group::kWidth - 1) * Group::kWidth;
-  for (size_t i = erase_begin; i < erase_end; ++i) {
-    EXPECT_EQ(1, t.erase(keys[i])) << i;
-  }
-  keys.erase(keys.begin() + erase_begin, keys.begin() + erase_end);
-
-  auto last_key = keys.back();
-  size_t last_key_num_probes = GetHashtableDebugNumProbes(t, last_key);
-
-  // Make sure that we have to make a lot of probes for last key.
-  ASSERT_GT(last_key_num_probes, kMinFullGroups);
-
-  int x = 1;
-  // Insert and erase one element, before inplace rehash happen.
-  while (last_key_num_probes == GetHashtableDebugNumProbes(t, last_key)) {
-    t.emplace(x);
-    ASSERT_EQ(capacity, t.capacity());
-    // All elements should be there.
-    ASSERT_TRUE(t.find(x) != t.end()) << x;
-    for (const auto& k : keys) {
-      ASSERT_TRUE(t.find(k) != t.end()) << k;
-    }
-    t.erase(x);
-    ++x;
-  }
-}
-
-TEST(Table, InsertEraseStressTest) {
-  IntTable t;
-  const size_t kMinElementCount = 250;
-  std::deque<int> keys;
-  size_t i = 0;
-  for (; i < MaxDensitySize(kMinElementCount); ++i) {
-    t.emplace(i);
-    keys.push_back(i);
-  }
-  const size_t kNumIterations = 1000000;
-  for (; i < kNumIterations; ++i) {
-    ASSERT_EQ(1, t.erase(keys.front()));
-    keys.pop_front();
-    t.emplace(i);
-    keys.push_back(i);
-  }
-}
-
-TEST(Table, InsertOverloads) {
-  StringTable t;
-  // These should all trigger the insert(init_type) overload.
-  t.insert({{}, {}});
-  t.insert({"ABC", {}});
-  t.insert({"DEF", "!!!"});
-
-  EXPECT_THAT(t, UnorderedElementsAre(Pair("", ""), Pair("ABC", ""),
-                                      Pair("DEF", "!!!")));
-}
-
-TEST(Table, LargeTable) {
-  IntTable t;
-  for (int64_t i = 0; i != 100000; ++i) t.emplace(i << 40);
-  for (int64_t i = 0; i != 100000; ++i) ASSERT_EQ(i << 40, *t.find(i << 40));
-}
-
-// Timeout if copy is quadratic as it was in Rust.
-TEST(Table, EnsureNonQuadraticAsInRust) {
-  static const size_t kLargeSize = 1 << 15;
-
-  IntTable t;
-  for (size_t i = 0; i != kLargeSize; ++i) {
-    t.insert(i);
-  }
-
-  // If this is quadratic, the test will timeout.
-  IntTable t2;
-  for (const auto& entry : t) t2.insert(entry);
-}
-
-TEST(Table, ClearBug) {
-  IntTable t;
-  constexpr size_t capacity = container_internal::Group::kWidth - 1;
-  constexpr size_t max_size = capacity / 2 + 1;
-  for (size_t i = 0; i < max_size; ++i) {
-    t.insert(i);
-  }
-  ASSERT_EQ(capacity, t.capacity());
-  intptr_t original = reinterpret_cast<intptr_t>(&*t.find(2));
-  t.clear();
-  ASSERT_EQ(capacity, t.capacity());
-  for (size_t i = 0; i < max_size; ++i) {
-    t.insert(i);
-  }
-  ASSERT_EQ(capacity, t.capacity());
-  intptr_t second = reinterpret_cast<intptr_t>(&*t.find(2));
-  // We are checking that original and second are close enough to each other
-  // that they are probably still in the same group.  This is not strictly
-  // guaranteed.
-  EXPECT_LT(std::abs(original - second),
-            capacity * sizeof(IntTable::value_type));
-}
-
-TEST(Table, Erase) {
-  IntTable t;
-  EXPECT_TRUE(t.find(0) == t.end());
-  auto res = t.emplace(0);
-  EXPECT_TRUE(res.second);
-  EXPECT_EQ(1, t.size());
-  t.erase(res.first);
-  EXPECT_EQ(0, t.size());
-  EXPECT_TRUE(t.find(0) == t.end());
-}
-
-TEST(Table, EraseMaintainsValidIterator) {
-  IntTable t;
-  const int kNumElements = 100;
-  for (int i = 0; i < kNumElements; i ++) {
-    EXPECT_TRUE(t.emplace(i).second);
-  }
-  EXPECT_EQ(t.size(), kNumElements);
-
-  int num_erase_calls = 0;
-  auto it = t.begin();
-  while (it != t.end()) {
-    t.erase(it++);
-    num_erase_calls++;
-  }
-
-  EXPECT_TRUE(t.empty());
-  EXPECT_EQ(num_erase_calls, kNumElements);
-}
-
-// Collect N bad keys by following algorithm:
-// 1. Create an empty table and reserve it to 2 * N.
-// 2. Insert N random elements.
-// 3. Take first Group::kWidth - 1 to bad_keys array.
-// 4. Clear the table without resize.
-// 5. Go to point 2 while N keys not collected
-std::vector<int64_t> CollectBadMergeKeys(size_t N) {
-  static constexpr int kGroupSize = Group::kWidth - 1;
-
-  auto topk_range = [](size_t b, size_t e,
-                       IntTable* t) -> std::vector<int64_t> {
-    for (size_t i = b; i != e; ++i) {
-      t->emplace(i);
-    }
-    std::vector<int64_t> res;
-    res.reserve(kGroupSize);
-    auto it = t->begin();
-    for (size_t i = b; i != e && i != b + kGroupSize; ++i, ++it) {
-      res.push_back(*it);
-    }
-    return res;
-  };
-
-  std::vector<int64_t> bad_keys;
-  bad_keys.reserve(N);
-  IntTable t;
-  t.reserve(N * 2);
-
-  for (size_t b = 0; bad_keys.size() < N; b += N) {
-    auto keys = topk_range(b, b + N, &t);
-    bad_keys.insert(bad_keys.end(), keys.begin(), keys.end());
-    t.erase(t.begin(), t.end());
-    EXPECT_TRUE(t.empty());
-  }
-  return bad_keys;
-}
-
-struct ProbeStats {
-  // Number of elements with specific probe length over all tested tables.
-  std::vector<size_t> all_probes_histogram;
-  // Ratios total_probe_length/size for every tested table.
-  std::vector<double> single_table_ratios;
-
-  friend ProbeStats operator+(const ProbeStats& a, const ProbeStats& b) {
-    ProbeStats res = a;
-    res.all_probes_histogram.resize(std::max(res.all_probes_histogram.size(),
-                                             b.all_probes_histogram.size()));
-    std::transform(b.all_probes_histogram.begin(), b.all_probes_histogram.end(),
-                   res.all_probes_histogram.begin(),
-                   res.all_probes_histogram.begin(), std::plus<size_t>());
-    res.single_table_ratios.insert(res.single_table_ratios.end(),
-                                   b.single_table_ratios.begin(),
-                                   b.single_table_ratios.end());
-    return res;
-  }
-
-  // Average ratio total_probe_length/size over tables.
-  double AvgRatio() const {
-    return std::accumulate(single_table_ratios.begin(),
-                           single_table_ratios.end(), 0.0) /
-           single_table_ratios.size();
-  }
-
-  // Maximum ratio total_probe_length/size over tables.
-  double MaxRatio() const {
-    return *std::max_element(single_table_ratios.begin(),
-                             single_table_ratios.end());
-  }
-
-  // Percentile ratio total_probe_length/size over tables.
-  double PercentileRatio(double Percentile = 0.95) const {
-    auto r = single_table_ratios;
-    auto mid = r.begin() + static_cast<size_t>(r.size() * Percentile);
-    if (mid != r.end()) {
-      std::nth_element(r.begin(), mid, r.end());
-      return *mid;
-    } else {
-      return MaxRatio();
-    }
-  }
-
-  // Maximum probe length over all elements and all tables.
-  size_t MaxProbe() const { return all_probes_histogram.size(); }
-
-  // Fraction of elements with specified probe length.
-  std::vector<double> ProbeNormalizedHistogram() const {
-    double total_elements = std::accumulate(all_probes_histogram.begin(),
-                                            all_probes_histogram.end(), 0ull);
-    std::vector<double> res;
-    for (size_t p : all_probes_histogram) {
-      res.push_back(p / total_elements);
-    }
-    return res;
-  }
-
-  size_t PercentileProbe(double Percentile = 0.99) const {
-    size_t idx = 0;
-    for (double p : ProbeNormalizedHistogram()) {
-      if (Percentile > p) {
-        Percentile -= p;
-        ++idx;
-      } else {
-        return idx;
-      }
-    }
-    return idx;
-  }
-
-  friend std::ostream& operator<<(std::ostream& out, const ProbeStats& s) {
-    out << "{AvgRatio:" << s.AvgRatio() << ", MaxRatio:" << s.MaxRatio()
-        << ", PercentileRatio:" << s.PercentileRatio()
-        << ", MaxProbe:" << s.MaxProbe() << ", Probes=[";
-    for (double p : s.ProbeNormalizedHistogram()) {
-      out << p << ",";
-    }
-    out << "]}";
-
-    return out;
-  }
-};
-
-struct ExpectedStats {
-  double avg_ratio;
-  double max_ratio;
-  std::vector<std::pair<double, double>> pecentile_ratios;
-  std::vector<std::pair<double, double>> pecentile_probes;
-
-  friend std::ostream& operator<<(std::ostream& out, const ExpectedStats& s) {
-    out << "{AvgRatio:" << s.avg_ratio << ", MaxRatio:" << s.max_ratio
-        << ", PercentileRatios: [";
-    for (auto el : s.pecentile_ratios) {
-      out << el.first << ":" << el.second << ", ";
-    }
-    out << "], PercentileProbes: [";
-    for (auto el : s.pecentile_probes) {
-      out << el.first << ":" << el.second << ", ";
-    }
-    out << "]}";
-
-    return out;
-  }
-};
-
-void VerifyStats(size_t size, const ExpectedStats& exp,
-                 const ProbeStats& stats) {
-  EXPECT_LT(stats.AvgRatio(), exp.avg_ratio) << size << " " << stats;
-  EXPECT_LT(stats.MaxRatio(), exp.max_ratio) << size << " " << stats;
-  for (auto pr : exp.pecentile_ratios) {
-    EXPECT_LE(stats.PercentileRatio(pr.first), pr.second)
-        << size << " " << pr.first << " " << stats;
-  }
-
-  for (auto pr : exp.pecentile_probes) {
-    EXPECT_LE(stats.PercentileProbe(pr.first), pr.second)
-        << size << " " << pr.first << " " << stats;
-  }
-}
-
-using ProbeStatsPerSize = std::map<size_t, ProbeStats>;
-
-// Collect total ProbeStats on num_iters iterations of the following algorithm:
-// 1. Create new table and reserve it to keys.size() * 2
-// 2. Insert all keys xored with seed
-// 3. Collect ProbeStats from final table.
-ProbeStats CollectProbeStatsOnKeysXoredWithSeed(
-    const std::vector<int64_t>& keys, size_t num_iters) {
-  const size_t reserve_size = keys.size() * 2;
-
-  ProbeStats stats;
-
-  int64_t seed = 0x71b1a19b907d6e33;
-  while (num_iters--) {
-    seed = static_cast<int64_t>(static_cast<uint64_t>(seed) * 17 + 13);
-    IntTable t1;
-    t1.reserve(reserve_size);
-    for (const auto& key : keys) {
-      t1.emplace(key ^ seed);
-    }
-
-    auto probe_histogram = GetHashtableDebugNumProbesHistogram(t1);
-    stats.all_probes_histogram.resize(
-        std::max(stats.all_probes_histogram.size(), probe_histogram.size()));
-    std::transform(probe_histogram.begin(), probe_histogram.end(),
-                   stats.all_probes_histogram.begin(),
-                   stats.all_probes_histogram.begin(), std::plus<size_t>());
-
-    size_t total_probe_seq_length = 0;
-    for (size_t i = 0; i < probe_histogram.size(); ++i) {
-      total_probe_seq_length += i * probe_histogram[i];
-    }
-    stats.single_table_ratios.push_back(total_probe_seq_length * 1.0 /
-                                        keys.size());
-    t1.erase(t1.begin(), t1.end());
-  }
-  return stats;
-}
-
-ExpectedStats XorSeedExpectedStats() {
-  constexpr bool kRandomizesInserts =
-#ifdef NDEBUG
-      false;
-#else   // NDEBUG
-      true;
-#endif  // NDEBUG
-
-  // The effective load factor is larger in non-opt mode because we insert
-  // elements out of order.
-  switch (container_internal::Group::kWidth) {
-    case 8:
-      if (kRandomizesInserts) {
-  return {0.05,
-          1.0,
-          {{0.95, 0.5}},
-          {{0.95, 0}, {0.99, 2}, {0.999, 4}, {0.9999, 10}}};
-      } else {
-  return {0.05,
-          2.0,
-          {{0.95, 0.1}},
-          {{0.95, 0}, {0.99, 2}, {0.999, 4}, {0.9999, 10}}};
-      }
-    case 16:
-      if (kRandomizesInserts) {
-        return {0.1,
-                1.0,
-                {{0.95, 0.1}},
-                {{0.95, 0}, {0.99, 1}, {0.999, 8}, {0.9999, 15}}};
-      } else {
-        return {0.05,
-                1.0,
-                {{0.95, 0.05}},
-                {{0.95, 0}, {0.99, 1}, {0.999, 4}, {0.9999, 10}}};
-      }
-  }
-  ABSL_RAW_LOG(FATAL, "%s", "Unknown Group width");
-  return {};
-}
-
-TEST(Table, DISABLED_EnsureNonQuadraticTopNXorSeedByProbeSeqLength) {
-  ProbeStatsPerSize stats;
-  std::vector<size_t> sizes = {Group::kWidth << 5, Group::kWidth << 10};
-  for (size_t size : sizes) {
-    stats[size] =
-        CollectProbeStatsOnKeysXoredWithSeed(CollectBadMergeKeys(size), 200);
-  }
-  auto expected = XorSeedExpectedStats();
-  for (size_t size : sizes) {
-    auto& stat = stats[size];
-    VerifyStats(size, expected, stat);
-  }
-}
-
-// Collect total ProbeStats on num_iters iterations of the following algorithm:
-// 1. Create new table
-// 2. Select 10% of keys and insert 10 elements key * 17 + j * 13
-// 3. Collect ProbeStats from final table
-ProbeStats CollectProbeStatsOnLinearlyTransformedKeys(
-    const std::vector<int64_t>& keys, size_t num_iters) {
-  ProbeStats stats;
-
-  std::random_device rd;
-  std::mt19937 rng(rd());
-  auto linear_transform = [](size_t x, size_t y) { return x * 17 + y * 13; };
-  std::uniform_int_distribution<size_t> dist(0, keys.size()-1);
-  while (num_iters--) {
-    IntTable t1;
-    size_t num_keys = keys.size() / 10;
-    size_t start = dist(rng);
-    for (size_t i = 0; i != num_keys; ++i) {
-      for (size_t j = 0; j != 10; ++j) {
-        t1.emplace(linear_transform(keys[(i + start) % keys.size()], j));
-      }
-    }
-
-    auto probe_histogram = GetHashtableDebugNumProbesHistogram(t1);
-    stats.all_probes_histogram.resize(
-        std::max(stats.all_probes_histogram.size(), probe_histogram.size()));
-    std::transform(probe_histogram.begin(), probe_histogram.end(),
-                   stats.all_probes_histogram.begin(),
-                   stats.all_probes_histogram.begin(), std::plus<size_t>());
-
-    size_t total_probe_seq_length = 0;
-    for (size_t i = 0; i < probe_histogram.size(); ++i) {
-      total_probe_seq_length += i * probe_histogram[i];
-    }
-    stats.single_table_ratios.push_back(total_probe_seq_length * 1.0 /
-                                        t1.size());
-    t1.erase(t1.begin(), t1.end());
-  }
-  return stats;
-}
-
-ExpectedStats LinearTransformExpectedStats() {
-  constexpr bool kRandomizesInserts =
-#ifdef NDEBUG
-      false;
-#else   // NDEBUG
-      true;
-#endif  // NDEBUG
-
-  // The effective load factor is larger in non-opt mode because we insert
-  // elements out of order.
-  switch (container_internal::Group::kWidth) {
-    case 8:
-      if (kRandomizesInserts) {
-        return {0.1,
-                0.5,
-                {{0.95, 0.3}},
-                {{0.95, 0}, {0.99, 1}, {0.999, 8}, {0.9999, 15}}};
-      } else {
-        return {0.15,
-                0.5,
-                {{0.95, 0.3}},
-                {{0.95, 0}, {0.99, 3}, {0.999, 15}, {0.9999, 25}}};
-      }
-    case 16:
-      if (kRandomizesInserts) {
-        return {0.1,
-                0.4,
-                {{0.95, 0.3}},
-                {{0.95, 0}, {0.99, 1}, {0.999, 8}, {0.9999, 15}}};
-      } else {
-        return {0.05,
-                0.2,
-                {{0.95, 0.1}},
-                {{0.95, 0}, {0.99, 1}, {0.999, 6}, {0.9999, 10}}};
-      }
-  }
-  ABSL_RAW_LOG(FATAL, "%s", "Unknown Group width");
-  return {};
-}
-
-TEST(Table, DISABLED_EnsureNonQuadraticTopNLinearTransformByProbeSeqLength) {
-  ProbeStatsPerSize stats;
-  std::vector<size_t> sizes = {Group::kWidth << 5, Group::kWidth << 10};
-  for (size_t size : sizes) {
-    stats[size] = CollectProbeStatsOnLinearlyTransformedKeys(
-        CollectBadMergeKeys(size), 300);
-  }
-  auto expected = LinearTransformExpectedStats();
-  for (size_t size : sizes) {
-    auto& stat = stats[size];
-    VerifyStats(size, expected, stat);
-  }
-}
-
-TEST(Table, EraseCollision) {
-  BadTable t;
-
-  // 1 2 3
-  t.emplace(1);
-  t.emplace(2);
-  t.emplace(3);
-  EXPECT_THAT(*t.find(1), 1);
-  EXPECT_THAT(*t.find(2), 2);
-  EXPECT_THAT(*t.find(3), 3);
-  EXPECT_EQ(3, t.size());
-
-  // 1 DELETED 3
-  t.erase(t.find(2));
-  EXPECT_THAT(*t.find(1), 1);
-  EXPECT_TRUE(t.find(2) == t.end());
-  EXPECT_THAT(*t.find(3), 3);
-  EXPECT_EQ(2, t.size());
-
-  // DELETED DELETED 3
-  t.erase(t.find(1));
-  EXPECT_TRUE(t.find(1) == t.end());
-  EXPECT_TRUE(t.find(2) == t.end());
-  EXPECT_THAT(*t.find(3), 3);
-  EXPECT_EQ(1, t.size());
-
-  // DELETED DELETED DELETED
-  t.erase(t.find(3));
-  EXPECT_TRUE(t.find(1) == t.end());
-  EXPECT_TRUE(t.find(2) == t.end());
-  EXPECT_TRUE(t.find(3) == t.end());
-  EXPECT_EQ(0, t.size());
-}
-
-TEST(Table, EraseInsertProbing) {
-  BadTable t(100);
-
-  // 1 2 3 4
-  t.emplace(1);
-  t.emplace(2);
-  t.emplace(3);
-  t.emplace(4);
-
-  // 1 DELETED 3 DELETED
-  t.erase(t.find(2));
-  t.erase(t.find(4));
-
-  // 1 10 3 11 12
-  t.emplace(10);
-  t.emplace(11);
-  t.emplace(12);
-
-  EXPECT_EQ(5, t.size());
-  EXPECT_THAT(t, UnorderedElementsAre(1, 10, 3, 11, 12));
-}
-
-TEST(Table, Clear) {
-  IntTable t;
-  EXPECT_TRUE(t.find(0) == t.end());
-  t.clear();
-  EXPECT_TRUE(t.find(0) == t.end());
-  auto res = t.emplace(0);
-  EXPECT_TRUE(res.second);
-  EXPECT_EQ(1, t.size());
-  t.clear();
-  EXPECT_EQ(0, t.size());
-  EXPECT_TRUE(t.find(0) == t.end());
-}
-
-TEST(Table, Swap) {
-  IntTable t;
-  EXPECT_TRUE(t.find(0) == t.end());
-  auto res = t.emplace(0);
-  EXPECT_TRUE(res.second);
-  EXPECT_EQ(1, t.size());
-  IntTable u;
-  t.swap(u);
-  EXPECT_EQ(0, t.size());
-  EXPECT_EQ(1, u.size());
-  EXPECT_TRUE(t.find(0) == t.end());
-  EXPECT_THAT(*u.find(0), 0);
-}
-
-TEST(Table, Rehash) {
-  IntTable t;
-  EXPECT_TRUE(t.find(0) == t.end());
-  t.emplace(0);
-  t.emplace(1);
-  EXPECT_EQ(2, t.size());
-  t.rehash(128);
-  EXPECT_EQ(2, t.size());
-  EXPECT_THAT(*t.find(0), 0);
-  EXPECT_THAT(*t.find(1), 1);
-}
-
-TEST(Table, RehashDoesNotRehashWhenNotNecessary) {
-  IntTable t;
-  t.emplace(0);
-  t.emplace(1);
-  auto* p = &*t.find(0);
-  t.rehash(1);
-  EXPECT_EQ(p, &*t.find(0));
-}
-
-TEST(Table, RehashZeroDoesNotAllocateOnEmptyTable) {
-  IntTable t;
-  t.rehash(0);
-  EXPECT_EQ(0, t.bucket_count());
-}
-
-TEST(Table, RehashZeroDeallocatesEmptyTable) {
-  IntTable t;
-  t.emplace(0);
-  t.clear();
-  EXPECT_NE(0, t.bucket_count());
-  t.rehash(0);
-  EXPECT_EQ(0, t.bucket_count());
-}
-
-TEST(Table, RehashZeroForcesRehash) {
-  IntTable t;
-  t.emplace(0);
-  t.emplace(1);
-  auto* p = &*t.find(0);
-  t.rehash(0);
-  EXPECT_NE(p, &*t.find(0));
-}
-
-TEST(Table, ConstructFromInitList) {
-  using P = std::pair<std::string, std::string>;
-  struct Q {
-    operator P() const { return {}; }
-  };
-  StringTable t = {P(), Q(), {}, {{}, {}}};
-}
-
-TEST(Table, CopyConstruct) {
-  IntTable t;
-  t.emplace(0);
-  EXPECT_EQ(1, t.size());
-  {
-    IntTable u(t);
-    EXPECT_EQ(1, u.size());
-    EXPECT_THAT(*u.find(0), 0);
-  }
-  {
-    IntTable u{t};
-    EXPECT_EQ(1, u.size());
-    EXPECT_THAT(*u.find(0), 0);
-  }
-  {
-    IntTable u = t;
-    EXPECT_EQ(1, u.size());
-    EXPECT_THAT(*u.find(0), 0);
-  }
-}
-
-TEST(Table, CopyConstructWithAlloc) {
-  StringTable t;
-  t.emplace("a", "b");
-  EXPECT_EQ(1, t.size());
-  StringTable u(t, Alloc<std::pair<std::string, std::string>>());
-  EXPECT_EQ(1, u.size());
-  EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-}
-
-struct ExplicitAllocIntTable
-    : raw_hash_set<IntPolicy, container_internal::hash_default_hash<int64_t>,
-                   std::equal_to<int64_t>, Alloc<int64_t>> {
-  ExplicitAllocIntTable() {}
-};
-
-TEST(Table, AllocWithExplicitCtor) {
-  ExplicitAllocIntTable t;
-  EXPECT_EQ(0, t.size());
-}
-
-TEST(Table, MoveConstruct) {
-  {
-    StringTable t;
-    t.emplace("a", "b");
-    EXPECT_EQ(1, t.size());
-
-    StringTable u(std::move(t));
-    EXPECT_EQ(1, u.size());
-    EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-  }
-  {
-    StringTable t;
-    t.emplace("a", "b");
-    EXPECT_EQ(1, t.size());
-
-    StringTable u{std::move(t)};
-    EXPECT_EQ(1, u.size());
-    EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-  }
-  {
-    StringTable t;
-    t.emplace("a", "b");
-    EXPECT_EQ(1, t.size());
-
-    StringTable u = std::move(t);
-    EXPECT_EQ(1, u.size());
-    EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-  }
-}
-
-TEST(Table, MoveConstructWithAlloc) {
-  StringTable t;
-  t.emplace("a", "b");
-  EXPECT_EQ(1, t.size());
-  StringTable u(std::move(t), Alloc<std::pair<std::string, std::string>>());
-  EXPECT_EQ(1, u.size());
-  EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-}
-
-TEST(Table, CopyAssign) {
-  StringTable t;
-  t.emplace("a", "b");
-  EXPECT_EQ(1, t.size());
-  StringTable u;
-  u = t;
-  EXPECT_EQ(1, u.size());
-  EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-}
-
-TEST(Table, CopySelfAssign) {
-  StringTable t;
-  t.emplace("a", "b");
-  EXPECT_EQ(1, t.size());
-  t = *&t;
-  EXPECT_EQ(1, t.size());
-  EXPECT_THAT(*t.find("a"), Pair("a", "b"));
-}
-
-TEST(Table, MoveAssign) {
-  StringTable t;
-  t.emplace("a", "b");
-  EXPECT_EQ(1, t.size());
-  StringTable u;
-  u = std::move(t);
-  EXPECT_EQ(1, u.size());
-  EXPECT_THAT(*u.find("a"), Pair("a", "b"));
-}
-
-TEST(Table, Equality) {
-  StringTable t;
-  std::vector<std::pair<std::string, std::string>> v = {{"a", "b"},
-                                                        {"aa", "bb"}};
-  t.insert(std::begin(v), std::end(v));
-  StringTable u = t;
-  EXPECT_EQ(u, t);
-}
-
-TEST(Table, Equality2) {
-  StringTable t;
-  std::vector<std::pair<std::string, std::string>> v1 = {{"a", "b"},
-                                                         {"aa", "bb"}};
-  t.insert(std::begin(v1), std::end(v1));
-  StringTable u;
-  std::vector<std::pair<std::string, std::string>> v2 = {{"a", "a"},
-                                                         {"aa", "aa"}};
-  u.insert(std::begin(v2), std::end(v2));
-  EXPECT_NE(u, t);
-}
-
-TEST(Table, Equality3) {
-  StringTable t;
-  std::vector<std::pair<std::string, std::string>> v1 = {{"b", "b"},
-                                                         {"bb", "bb"}};
-  t.insert(std::begin(v1), std::end(v1));
-  StringTable u;
-  std::vector<std::pair<std::string, std::string>> v2 = {{"a", "a"},
-                                                         {"aa", "aa"}};
-  u.insert(std::begin(v2), std::end(v2));
-  EXPECT_NE(u, t);
-}
-
-TEST(Table, NumDeletedRegression) {
-  IntTable t;
-  t.emplace(0);
-  t.erase(t.find(0));
-  // construct over a deleted slot.
-  t.emplace(0);
-  t.clear();
-}
-
-TEST(Table, FindFullDeletedRegression) {
-  IntTable t;
-  for (int i = 0; i < 1000; ++i) {
-    t.emplace(i);
-    t.erase(t.find(i));
-  }
-  EXPECT_EQ(0, t.size());
-}
-
-TEST(Table, ReplacingDeletedSlotDoesNotRehash) {
-  size_t n;
-  {
-    // Compute n such that n is the maximum number of elements before rehash.
-    IntTable t;
-    t.emplace(0);
-    size_t c = t.bucket_count();
-    for (n = 1; c == t.bucket_count(); ++n) t.emplace(n);
-    --n;
-  }
-  IntTable t;
-  t.rehash(n);
-  const size_t c = t.bucket_count();
-  for (size_t i = 0; i != n; ++i) t.emplace(i);
-  EXPECT_EQ(c, t.bucket_count()) << "rehashing threshold = " << n;
-  t.erase(0);
-  t.emplace(0);
-  EXPECT_EQ(c, t.bucket_count()) << "rehashing threshold = " << n;
-}
-
-TEST(Table, NoThrowMoveConstruct) {
-  ASSERT_TRUE(
-      std::is_nothrow_copy_constructible<absl::Hash<absl::string_view>>::value);
-  ASSERT_TRUE(std::is_nothrow_copy_constructible<
-              std::equal_to<absl::string_view>>::value);
-  ASSERT_TRUE(std::is_nothrow_copy_constructible<std::allocator<int>>::value);
-  EXPECT_TRUE(std::is_nothrow_move_constructible<StringTable>::value);
-}
-
-TEST(Table, NoThrowMoveAssign) {
-  ASSERT_TRUE(
-      std::is_nothrow_move_assignable<absl::Hash<absl::string_view>>::value);
-  ASSERT_TRUE(
-      std::is_nothrow_move_assignable<std::equal_to<absl::string_view>>::value);
-  ASSERT_TRUE(std::is_nothrow_move_assignable<std::allocator<int>>::value);
-  ASSERT_TRUE(
-      absl::allocator_traits<std::allocator<int>>::is_always_equal::value);
-  EXPECT_TRUE(std::is_nothrow_move_assignable<StringTable>::value);
-}
-
-TEST(Table, NoThrowSwappable) {
-  ASSERT_TRUE(
-      container_internal::IsNoThrowSwappable<absl::Hash<absl::string_view>>());
-  ASSERT_TRUE(container_internal::IsNoThrowSwappable<
-              std::equal_to<absl::string_view>>());
-  ASSERT_TRUE(container_internal::IsNoThrowSwappable<std::allocator<int>>());
-  EXPECT_TRUE(container_internal::IsNoThrowSwappable<StringTable>());
-}
-
-TEST(Table, HeterogeneousLookup) {
-  struct Hash {
-    size_t operator()(int64_t i) const { return i; }
-    size_t operator()(double i) const {
-      ADD_FAILURE();
-      return i;
-    }
-  };
-  struct Eq {
-    bool operator()(int64_t a, int64_t b) const { return a == b; }
-    bool operator()(double a, int64_t b) const {
-      ADD_FAILURE();
-      return a == b;
-    }
-    bool operator()(int64_t a, double b) const {
-      ADD_FAILURE();
-      return a == b;
-    }
-    bool operator()(double a, double b) const {
-      ADD_FAILURE();
-      return a == b;
-    }
-  };
-
-  struct THash {
-    using is_transparent = void;
-    size_t operator()(int64_t i) const { return i; }
-    size_t operator()(double i) const { return i; }
-  };
-  struct TEq {
-    using is_transparent = void;
-    bool operator()(int64_t a, int64_t b) const { return a == b; }
-    bool operator()(double a, int64_t b) const { return a == b; }
-    bool operator()(int64_t a, double b) const { return a == b; }
-    bool operator()(double a, double b) const { return a == b; }
-  };
-
-  raw_hash_set<IntPolicy, Hash, Eq, Alloc<int64_t>> s{0, 1, 2};
-  // It will convert to int64_t before the query.
-  EXPECT_EQ(1, *s.find(double{1.1}));
-
-  raw_hash_set<IntPolicy, THash, TEq, Alloc<int64_t>> ts{0, 1, 2};
-  // It will try to use the double, and fail to find the object.
-  EXPECT_TRUE(ts.find(1.1) == ts.end());
-}
-
-template <class Table>
-using CallFind = decltype(std::declval<Table&>().find(17));
-
-template <class Table>
-using CallErase = decltype(std::declval<Table&>().erase(17));
-
-template <class Table>
-using CallExtract = decltype(std::declval<Table&>().extract(17));
-
-template <class Table>
-using CallPrefetch = decltype(std::declval<Table&>().prefetch(17));
-
-template <class Table>
-using CallCount = decltype(std::declval<Table&>().count(17));
-
-template <template <typename> class C, class Table, class = void>
-struct VerifyResultOf : std::false_type {};
-
-template <template <typename> class C, class Table>
-struct VerifyResultOf<C, Table, absl::void_t<C<Table>>> : std::true_type {};
-
-TEST(Table, HeterogeneousLookupOverloads) {
-  using NonTransparentTable =
-      raw_hash_set<StringPolicy, absl::Hash<absl::string_view>,
-                   std::equal_to<absl::string_view>, std::allocator<int>>;
-
-  EXPECT_FALSE((VerifyResultOf<CallFind, NonTransparentTable>()));
-  EXPECT_FALSE((VerifyResultOf<CallErase, NonTransparentTable>()));
-  EXPECT_FALSE((VerifyResultOf<CallExtract, NonTransparentTable>()));
-  EXPECT_FALSE((VerifyResultOf<CallPrefetch, NonTransparentTable>()));
-  EXPECT_FALSE((VerifyResultOf<CallCount, NonTransparentTable>()));
-
-  using TransparentTable = raw_hash_set<
-      StringPolicy,
-      absl::container_internal::hash_default_hash<absl::string_view>,
-      absl::container_internal::hash_default_eq<absl::string_view>,
-      std::allocator<int>>;
-
-  EXPECT_TRUE((VerifyResultOf<CallFind, TransparentTable>()));
-  EXPECT_TRUE((VerifyResultOf<CallErase, TransparentTable>()));
-  EXPECT_TRUE((VerifyResultOf<CallExtract, TransparentTable>()));
-  EXPECT_TRUE((VerifyResultOf<CallPrefetch, TransparentTable>()));
-  EXPECT_TRUE((VerifyResultOf<CallCount, TransparentTable>()));
-}
-
-// TODO(alkis): Expand iterator tests.
-TEST(Iterator, IsDefaultConstructible) {
-  StringTable::iterator i;
-  EXPECT_TRUE(i == StringTable::iterator());
-}
-
-TEST(ConstIterator, IsDefaultConstructible) {
-  StringTable::const_iterator i;
-  EXPECT_TRUE(i == StringTable::const_iterator());
-}
-
-TEST(Iterator, ConvertsToConstIterator) {
-  StringTable::iterator i;
-  EXPECT_TRUE(i == StringTable::const_iterator());
-}
-
-TEST(Iterator, Iterates) {
-  IntTable t;
-  for (size_t i = 3; i != 6; ++i) EXPECT_TRUE(t.emplace(i).second);
-  EXPECT_THAT(t, UnorderedElementsAre(3, 4, 5));
-}
-
-TEST(Table, Merge) {
-  StringTable t1, t2;
-  t1.emplace("0", "-0");
-  t1.emplace("1", "-1");
-  t2.emplace("0", "~0");
-  t2.emplace("2", "~2");
-
-  EXPECT_THAT(t1, UnorderedElementsAre(Pair("0", "-0"), Pair("1", "-1")));
-  EXPECT_THAT(t2, UnorderedElementsAre(Pair("0", "~0"), Pair("2", "~2")));
-
-  t1.merge(t2);
-  EXPECT_THAT(t1, UnorderedElementsAre(Pair("0", "-0"), Pair("1", "-1"),
-                                       Pair("2", "~2")));
-  EXPECT_THAT(t2, UnorderedElementsAre(Pair("0", "~0")));
-}
-
-TEST(Table, IteratorEmplaceConstructibleRequirement) {
-  struct Value {
-    explicit Value(absl::string_view view) : value(view) {}
-    std::string value;
-
-    bool operator==(const Value& other) const { return value == other.value; }
-  };
-  struct H {
-    size_t operator()(const Value& v) const {
-      return absl::Hash<std::string>{}(v.value);
-    }
-  };
-
-  struct Table : raw_hash_set<ValuePolicy<Value>, H, std::equal_to<Value>,
-                              std::allocator<Value>> {
-    using Base = typename Table::raw_hash_set;
-    using Base::Base;
-  };
-
-  std::string input[3]{"A", "B", "C"};
-
-  Table t(std::begin(input), std::end(input));
-  EXPECT_THAT(t, UnorderedElementsAre(Value{"A"}, Value{"B"}, Value{"C"}));
-
-  input[0] = "D";
-  input[1] = "E";
-  input[2] = "F";
-  t.insert(std::begin(input), std::end(input));
-  EXPECT_THAT(t, UnorderedElementsAre(Value{"A"}, Value{"B"}, Value{"C"},
-                                      Value{"D"}, Value{"E"}, Value{"F"}));
-}
-
-TEST(Nodes, EmptyNodeType) {
-  using node_type = StringTable::node_type;
-  node_type n;
-  EXPECT_FALSE(n);
-  EXPECT_TRUE(n.empty());
-
-  EXPECT_TRUE((std::is_same<node_type::allocator_type,
-                            StringTable::allocator_type>::value));
-}
-
-TEST(Nodes, ExtractInsert) {
-  constexpr char k0[] = "Very long string zero.";
-  constexpr char k1[] = "Very long string one.";
-  constexpr char k2[] = "Very long string two.";
-  StringTable t = {{k0, ""}, {k1, ""}, {k2, ""}};
-  EXPECT_THAT(t,
-              UnorderedElementsAre(Pair(k0, ""), Pair(k1, ""), Pair(k2, "")));
-
-  auto node = t.extract(k0);
-  EXPECT_THAT(t, UnorderedElementsAre(Pair(k1, ""), Pair(k2, "")));
-  EXPECT_TRUE(node);
-  EXPECT_FALSE(node.empty());
-
-  StringTable t2;
-  StringTable::insert_return_type res = t2.insert(std::move(node));
-  EXPECT_TRUE(res.inserted);
-  EXPECT_THAT(*res.position, Pair(k0, ""));
-  EXPECT_FALSE(res.node);
-  EXPECT_THAT(t2, UnorderedElementsAre(Pair(k0, "")));
-
-  // Not there.
-  EXPECT_THAT(t, UnorderedElementsAre(Pair(k1, ""), Pair(k2, "")));
-  node = t.extract("Not there!");
-  EXPECT_THAT(t, UnorderedElementsAre(Pair(k1, ""), Pair(k2, "")));
-  EXPECT_FALSE(node);
-
-  // Inserting nothing.
-  res = t2.insert(std::move(node));
-  EXPECT_FALSE(res.inserted);
-  EXPECT_EQ(res.position, t2.end());
-  EXPECT_FALSE(res.node);
-  EXPECT_THAT(t2, UnorderedElementsAre(Pair(k0, "")));
-
-  t.emplace(k0, "1");
-  node = t.extract(k0);
-
-  // Insert duplicate.
-  res = t2.insert(std::move(node));
-  EXPECT_FALSE(res.inserted);
-  EXPECT_THAT(*res.position, Pair(k0, ""));
-  EXPECT_TRUE(res.node);
-  EXPECT_FALSE(node);
-}
-
-TEST(Nodes, HintInsert) {
-  IntTable t = {1, 2, 3};
-  auto node = t.extract(1);
-  EXPECT_THAT(t, UnorderedElementsAre(2, 3));
-  auto it = t.insert(t.begin(), std::move(node));
-  EXPECT_THAT(t, UnorderedElementsAre(1, 2, 3));
-  EXPECT_EQ(*it, 1);
-  EXPECT_FALSE(node);
-
-  node = t.extract(2);
-  EXPECT_THAT(t, UnorderedElementsAre(1, 3));
-  // reinsert 2 to make the next insert fail.
-  t.insert(2);
-  EXPECT_THAT(t, UnorderedElementsAre(1, 2, 3));
-  it = t.insert(t.begin(), std::move(node));
-  EXPECT_EQ(*it, 2);
-  // The node was not emptied by the insert call.
-  EXPECT_TRUE(node);
-}
-
-IntTable MakeSimpleTable(size_t size) {
-  IntTable t;
-  while (t.size() < size) t.insert(t.size());
-  return t;
-}
-
-std::vector<int> OrderOfIteration(const IntTable& t) {
-  return {t.begin(), t.end()};
-}
-
-// These IterationOrderChanges tests depend on non-deterministic behavior.
-// We are injecting non-determinism from the pointer of the table, but do so in
-// a way that only the page matters. We have to retry enough times to make sure
-// we are touching different memory pages to cause the ordering to change.
-// We also need to keep the old tables around to avoid getting the same memory
-// blocks over and over.
-TEST(Table, IterationOrderChangesByInstance) {
-  for (size_t size : {2, 6, 12, 20}) {
-    const auto reference_table = MakeSimpleTable(size);
-    const auto reference = OrderOfIteration(reference_table);
-
-    std::vector<IntTable> tables;
-    bool found_difference = false;
-    for (int i = 0; !found_difference && i < 5000; ++i) {
-      tables.push_back(MakeSimpleTable(size));
-      found_difference = OrderOfIteration(tables.back()) != reference;
-    }
-    if (!found_difference) {
-      FAIL()
-          << "Iteration order remained the same across many attempts with size "
-          << size;
-    }
-  }
-}
-
-TEST(Table, IterationOrderChangesOnRehash) {
-  std::vector<IntTable> garbage;
-  for (int i = 0; i < 5000; ++i) {
-    auto t = MakeSimpleTable(20);
-    const auto reference = OrderOfIteration(t);
-    // Force rehash to the same size.
-    t.rehash(0);
-    auto trial = OrderOfIteration(t);
-    if (trial != reference) {
-      // We are done.
-      return;
-    }
-    garbage.push_back(std::move(t));
-  }
-  FAIL() << "Iteration order remained the same across many attempts.";
-}
-
-// Verify that pointers are invalidated as soon as a second element is inserted.
-// This prevents dependency on pointer stability on small tables.
-TEST(Table, UnstablePointers) {
-  IntTable table;
-
-  const auto addr = [&](int i) {
-    return reinterpret_cast<uintptr_t>(&*table.find(i));
-  };
-
-  table.insert(0);
-  const uintptr_t old_ptr = addr(0);
-
-  // This causes a rehash.
-  table.insert(1);
-
-  EXPECT_NE(old_ptr, addr(0));
-}
-
-// Confirm that we assert if we try to erase() end().
-TEST(TableDeathTest, EraseOfEndAsserts) {
-  // Use an assert with side-effects to figure out if they are actually enabled.
-  bool assert_enabled = false;
-  assert([&]() {
-    assert_enabled = true;
-    return true;
-  }());
-  if (!assert_enabled) return;
-
-  IntTable t;
-  // Extra simple "regexp" as regexp support is highly varied across platforms.
-  constexpr char kDeathMsg[] = "Invalid operation on iterator";
-  EXPECT_DEATH_IF_SUPPORTED(t.erase(t.end()), kDeathMsg);
-}
-
-#if defined(ABSL_INTERNAL_HASHTABLEZ_SAMPLE)
-TEST(RawHashSamplerTest, Sample) {
-  // Enable the feature even if the prod default is off.
-  SetHashtablezEnabled(true);
-  SetHashtablezSampleParameter(100);
-
-  auto& sampler = HashtablezSampler::Global();
-  size_t start_size = 0;
-  start_size += sampler.Iterate([&](const HashtablezInfo&) { ++start_size; });
-
-  std::vector<IntTable> tables;
-  for (int i = 0; i < 1000000; ++i) {
-    tables.emplace_back();
-    tables.back().insert(1);
-  }
-  size_t end_size = 0;
-  end_size += sampler.Iterate([&](const HashtablezInfo&) { ++end_size; });
-
-  EXPECT_NEAR((end_size - start_size) / static_cast<double>(tables.size()),
-              0.01, 0.005);
-}
-#endif  // ABSL_INTERNAL_HASHTABLEZ_SAMPLE
-
-TEST(RawHashSamplerTest, DoNotSampleCustomAllocators) {
-  // Enable the feature even if the prod default is off.
-  SetHashtablezEnabled(true);
-  SetHashtablezSampleParameter(100);
-
-  auto& sampler = HashtablezSampler::Global();
-  size_t start_size = 0;
-  start_size += sampler.Iterate([&](const HashtablezInfo&) { ++start_size; });
-
-  std::vector<CustomAllocIntTable> tables;
-  for (int i = 0; i < 1000000; ++i) {
-    tables.emplace_back();
-    tables.back().insert(1);
-  }
-  size_t end_size = 0;
-  end_size += sampler.Iterate([&](const HashtablezInfo&) { ++end_size; });
-
-  EXPECT_NEAR((end_size - start_size) / static_cast<double>(tables.size()),
-              0.00, 0.001);
-}
-
-#ifdef ABSL_HAVE_ADDRESS_SANITIZER
-TEST(Sanitizer, PoisoningUnused) {
-  IntTable t;
-  t.reserve(5);
-  // Insert something to force an allocation.
-  int64_t& v1 = *t.insert(0).first;
-
-  // Make sure there is something to test.
-  ASSERT_GT(t.capacity(), 1);
-
-  int64_t* slots = RawHashSetTestOnlyAccess::GetSlots(t);
-  for (size_t i = 0; i < t.capacity(); ++i) {
-    EXPECT_EQ(slots + i != &v1, __asan_address_is_poisoned(slots + i));
-  }
-}
-
-TEST(Sanitizer, PoisoningOnErase) {
-  IntTable t;
-  int64_t& v = *t.insert(0).first;
-
-  EXPECT_FALSE(__asan_address_is_poisoned(&v));
-  t.erase(0);
-  EXPECT_TRUE(__asan_address_is_poisoned(&v));
-}
-#endif  // ABSL_HAVE_ADDRESS_SANITIZER
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/test_instance_tracker.cc b/third_party/abseil/absl/container/internal/test_instance_tracker.cc
deleted file mode 100644
index f9947f0..0000000
--- a/third_party/abseil/absl/container/internal/test_instance_tracker.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/test_instance_tracker.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace test_internal {
-int BaseCountedInstance::num_instances_ = 0;
-int BaseCountedInstance::num_live_instances_ = 0;
-int BaseCountedInstance::num_moves_ = 0;
-int BaseCountedInstance::num_copies_ = 0;
-int BaseCountedInstance::num_swaps_ = 0;
-int BaseCountedInstance::num_comparisons_ = 0;
-
-}  // namespace test_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/test_instance_tracker.h b/third_party/abseil/absl/container/internal/test_instance_tracker.h
deleted file mode 100644
index 5ff6fd7..0000000
--- a/third_party/abseil/absl/container/internal/test_instance_tracker.h
+++ /dev/null
@@ -1,274 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_TEST_INSTANCE_TRACKER_H_
-#define ABSL_CONTAINER_INTERNAL_TEST_INSTANCE_TRACKER_H_
-
-#include <cstdlib>
-#include <ostream>
-
-#include "absl/types/compare.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace test_internal {
-
-// A type that counts number of occurrences of the type, the live occurrences of
-// the type, as well as the number of copies, moves, swaps, and comparisons that
-// have occurred on the type. This is used as a base class for the copyable,
-// copyable+movable, and movable types below that are used in actual tests. Use
-// InstanceTracker in tests to track the number of instances.
-class BaseCountedInstance {
- public:
-  explicit BaseCountedInstance(int x) : value_(x) {
-    ++num_instances_;
-    ++num_live_instances_;
-  }
-  BaseCountedInstance(const BaseCountedInstance& x)
-      : value_(x.value_), is_live_(x.is_live_) {
-    ++num_instances_;
-    if (is_live_) ++num_live_instances_;
-    ++num_copies_;
-  }
-  BaseCountedInstance(BaseCountedInstance&& x)
-      : value_(x.value_), is_live_(x.is_live_) {
-    x.is_live_ = false;
-    ++num_instances_;
-    ++num_moves_;
-  }
-  ~BaseCountedInstance() {
-    --num_instances_;
-    if (is_live_) --num_live_instances_;
-  }
-
-  BaseCountedInstance& operator=(const BaseCountedInstance& x) {
-    value_ = x.value_;
-    if (is_live_) --num_live_instances_;
-    is_live_ = x.is_live_;
-    if (is_live_) ++num_live_instances_;
-    ++num_copies_;
-    return *this;
-  }
-  BaseCountedInstance& operator=(BaseCountedInstance&& x) {
-    value_ = x.value_;
-    if (is_live_) --num_live_instances_;
-    is_live_ = x.is_live_;
-    x.is_live_ = false;
-    ++num_moves_;
-    return *this;
-  }
-
-  bool operator==(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ == x.value_;
-  }
-
-  bool operator!=(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ != x.value_;
-  }
-
-  bool operator<(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ < x.value_;
-  }
-
-  bool operator>(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ > x.value_;
-  }
-
-  bool operator<=(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ <= x.value_;
-  }
-
-  bool operator>=(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ >= x.value_;
-  }
-
-  absl::weak_ordering compare(const BaseCountedInstance& x) const {
-    ++num_comparisons_;
-    return value_ < x.value_
-               ? absl::weak_ordering::less
-               : value_ == x.value_ ? absl::weak_ordering::equivalent
-                                    : absl::weak_ordering::greater;
-  }
-
-  int value() const {
-    if (!is_live_) std::abort();
-    return value_;
-  }
-
-  friend std::ostream& operator<<(std::ostream& o,
-                                  const BaseCountedInstance& v) {
-    return o << "[value:" << v.value() << "]";
-  }
-
-  // Implementation of efficient swap() that counts swaps.
-  static void SwapImpl(
-      BaseCountedInstance& lhs,    // NOLINT(runtime/references)
-      BaseCountedInstance& rhs) {  // NOLINT(runtime/references)
-    using std::swap;
-    swap(lhs.value_, rhs.value_);
-    swap(lhs.is_live_, rhs.is_live_);
-    ++BaseCountedInstance::num_swaps_;
-  }
-
- private:
-  friend class InstanceTracker;
-
-  int value_;
-
-  // Indicates if the value is live, ie it hasn't been moved away from.
-  bool is_live_ = true;
-
-  // Number of instances.
-  static int num_instances_;
-
-  // Number of live instances (those that have not been moved away from.)
-  static int num_live_instances_;
-
-  // Number of times that BaseCountedInstance objects were moved.
-  static int num_moves_;
-
-  // Number of times that BaseCountedInstance objects were copied.
-  static int num_copies_;
-
-  // Number of times that BaseCountedInstance objects were swapped.
-  static int num_swaps_;
-
-  // Number of times that BaseCountedInstance objects were compared.
-  static int num_comparisons_;
-};
-
-// Helper to track the BaseCountedInstance instance counters. Expects that the
-// number of instances and live_instances are the same when it is constructed
-// and when it is destructed.
-class InstanceTracker {
- public:
-  InstanceTracker()
-      : start_instances_(BaseCountedInstance::num_instances_),
-        start_live_instances_(BaseCountedInstance::num_live_instances_) {
-    ResetCopiesMovesSwaps();
-  }
-  ~InstanceTracker() {
-    if (instances() != 0) std::abort();
-    if (live_instances() != 0) std::abort();
-  }
-
-  // Returns the number of BaseCountedInstance instances both containing valid
-  // values and those moved away from compared to when the InstanceTracker was
-  // constructed
-  int instances() const {
-    return BaseCountedInstance::num_instances_ - start_instances_;
-  }
-
-  // Returns the number of live BaseCountedInstance instances compared to when
-  // the InstanceTracker was constructed
-  int live_instances() const {
-    return BaseCountedInstance::num_live_instances_ - start_live_instances_;
-  }
-
-  // Returns the number of moves on BaseCountedInstance objects since
-  // construction or since the last call to ResetCopiesMovesSwaps().
-  int moves() const { return BaseCountedInstance::num_moves_ - start_moves_; }
-
-  // Returns the number of copies on BaseCountedInstance objects since
-  // construction or the last call to ResetCopiesMovesSwaps().
-  int copies() const {
-    return BaseCountedInstance::num_copies_ - start_copies_;
-  }
-
-  // Returns the number of swaps on BaseCountedInstance objects since
-  // construction or the last call to ResetCopiesMovesSwaps().
-  int swaps() const { return BaseCountedInstance::num_swaps_ - start_swaps_; }
-
-  // Returns the number of comparisons on BaseCountedInstance objects since
-  // construction or the last call to ResetCopiesMovesSwaps().
-  int comparisons() const {
-    return BaseCountedInstance::num_comparisons_ - start_comparisons_;
-  }
-
-  // Resets the base values for moves, copies, comparisons, and swaps to the
-  // current values, so that subsequent Get*() calls for moves, copies,
-  // comparisons, and swaps will compare to the situation at the point of this
-  // call.
-  void ResetCopiesMovesSwaps() {
-    start_moves_ = BaseCountedInstance::num_moves_;
-    start_copies_ = BaseCountedInstance::num_copies_;
-    start_swaps_ = BaseCountedInstance::num_swaps_;
-    start_comparisons_ = BaseCountedInstance::num_comparisons_;
-  }
-
- private:
-  int start_instances_;
-  int start_live_instances_;
-  int start_moves_;
-  int start_copies_;
-  int start_swaps_;
-  int start_comparisons_;
-};
-
-// Copyable, not movable.
-class CopyableOnlyInstance : public BaseCountedInstance {
- public:
-  explicit CopyableOnlyInstance(int x) : BaseCountedInstance(x) {}
-  CopyableOnlyInstance(const CopyableOnlyInstance& rhs) = default;
-  CopyableOnlyInstance& operator=(const CopyableOnlyInstance& rhs) = default;
-
-  friend void swap(CopyableOnlyInstance& lhs, CopyableOnlyInstance& rhs) {
-    BaseCountedInstance::SwapImpl(lhs, rhs);
-  }
-
-  static bool supports_move() { return false; }
-};
-
-// Copyable and movable.
-class CopyableMovableInstance : public BaseCountedInstance {
- public:
-  explicit CopyableMovableInstance(int x) : BaseCountedInstance(x) {}
-  CopyableMovableInstance(const CopyableMovableInstance& rhs) = default;
-  CopyableMovableInstance(CopyableMovableInstance&& rhs) = default;
-  CopyableMovableInstance& operator=(const CopyableMovableInstance& rhs) =
-      default;
-  CopyableMovableInstance& operator=(CopyableMovableInstance&& rhs) = default;
-
-  friend void swap(CopyableMovableInstance& lhs, CopyableMovableInstance& rhs) {
-    BaseCountedInstance::SwapImpl(lhs, rhs);
-  }
-
-  static bool supports_move() { return true; }
-};
-
-// Only movable, not default-constructible.
-class MovableOnlyInstance : public BaseCountedInstance {
- public:
-  explicit MovableOnlyInstance(int x) : BaseCountedInstance(x) {}
-  MovableOnlyInstance(MovableOnlyInstance&& other) = default;
-  MovableOnlyInstance& operator=(MovableOnlyInstance&& other) = default;
-
-  friend void swap(MovableOnlyInstance& lhs, MovableOnlyInstance& rhs) {
-    BaseCountedInstance::SwapImpl(lhs, rhs);
-  }
-
-  static bool supports_move() { return true; }
-};
-
-}  // namespace test_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_TEST_INSTANCE_TRACKER_H_
diff --git a/third_party/abseil/absl/container/internal/test_instance_tracker_test.cc b/third_party/abseil/absl/container/internal/test_instance_tracker_test.cc
deleted file mode 100644
index 1c6a4fa..0000000
--- a/third_party/abseil/absl/container/internal/test_instance_tracker_test.cc
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/internal/test_instance_tracker.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using absl::test_internal::CopyableMovableInstance;
-using absl::test_internal::CopyableOnlyInstance;
-using absl::test_internal::InstanceTracker;
-using absl::test_internal::MovableOnlyInstance;
-
-TEST(TestInstanceTracker, CopyableMovable) {
-  InstanceTracker tracker;
-  CopyableMovableInstance src(1);
-  EXPECT_EQ(1, src.value()) << src;
-  CopyableMovableInstance copy(src);
-  CopyableMovableInstance move(std::move(src));
-  EXPECT_EQ(1, tracker.copies());
-  EXPECT_EQ(1, tracker.moves());
-  EXPECT_EQ(0, tracker.swaps());
-  EXPECT_EQ(3, tracker.instances());
-  EXPECT_EQ(2, tracker.live_instances());
-  tracker.ResetCopiesMovesSwaps();
-
-  CopyableMovableInstance copy_assign(1);
-  copy_assign = copy;
-  CopyableMovableInstance move_assign(1);
-  move_assign = std::move(move);
-  EXPECT_EQ(1, tracker.copies());
-  EXPECT_EQ(1, tracker.moves());
-  EXPECT_EQ(0, tracker.swaps());
-  EXPECT_EQ(5, tracker.instances());
-  EXPECT_EQ(3, tracker.live_instances());
-  tracker.ResetCopiesMovesSwaps();
-
-  {
-    using std::swap;
-    swap(move_assign, copy);
-    swap(copy, move_assign);
-    EXPECT_EQ(2, tracker.swaps());
-    EXPECT_EQ(0, tracker.copies());
-    EXPECT_EQ(0, tracker.moves());
-    EXPECT_EQ(5, tracker.instances());
-    EXPECT_EQ(3, tracker.live_instances());
-  }
-}
-
-TEST(TestInstanceTracker, CopyableOnly) {
-  InstanceTracker tracker;
-  CopyableOnlyInstance src(1);
-  EXPECT_EQ(1, src.value()) << src;
-  CopyableOnlyInstance copy(src);
-  CopyableOnlyInstance copy2(std::move(src));  // NOLINT
-  EXPECT_EQ(2, tracker.copies());
-  EXPECT_EQ(0, tracker.moves());
-  EXPECT_EQ(3, tracker.instances());
-  EXPECT_EQ(3, tracker.live_instances());
-  tracker.ResetCopiesMovesSwaps();
-
-  CopyableOnlyInstance copy_assign(1);
-  copy_assign = copy;
-  CopyableOnlyInstance copy_assign2(1);
-  copy_assign2 = std::move(copy2);  // NOLINT
-  EXPECT_EQ(2, tracker.copies());
-  EXPECT_EQ(0, tracker.moves());
-  EXPECT_EQ(5, tracker.instances());
-  EXPECT_EQ(5, tracker.live_instances());
-  tracker.ResetCopiesMovesSwaps();
-
-  {
-    using std::swap;
-    swap(src, copy);
-    swap(copy, src);
-    EXPECT_EQ(2, tracker.swaps());
-    EXPECT_EQ(0, tracker.copies());
-    EXPECT_EQ(0, tracker.moves());
-    EXPECT_EQ(5, tracker.instances());
-    EXPECT_EQ(5, tracker.live_instances());
-  }
-}
-
-TEST(TestInstanceTracker, MovableOnly) {
-  InstanceTracker tracker;
-  MovableOnlyInstance src(1);
-  EXPECT_EQ(1, src.value()) << src;
-  MovableOnlyInstance move(std::move(src));
-  MovableOnlyInstance move_assign(2);
-  move_assign = std::move(move);
-  EXPECT_EQ(3, tracker.instances());
-  EXPECT_EQ(1, tracker.live_instances());
-  EXPECT_EQ(2, tracker.moves());
-  EXPECT_EQ(0, tracker.copies());
-  tracker.ResetCopiesMovesSwaps();
-
-  {
-    using std::swap;
-    MovableOnlyInstance other(2);
-    swap(move_assign, other);
-    swap(other, move_assign);
-    EXPECT_EQ(2, tracker.swaps());
-    EXPECT_EQ(0, tracker.copies());
-    EXPECT_EQ(0, tracker.moves());
-    EXPECT_EQ(4, tracker.instances());
-    EXPECT_EQ(2, tracker.live_instances());
-  }
-}
-
-TEST(TestInstanceTracker, ExistingInstances) {
-  CopyableMovableInstance uncounted_instance(1);
-  CopyableMovableInstance uncounted_live_instance(
-      std::move(uncounted_instance));
-  InstanceTracker tracker;
-  EXPECT_EQ(0, tracker.instances());
-  EXPECT_EQ(0, tracker.live_instances());
-  EXPECT_EQ(0, tracker.copies());
-  {
-    CopyableMovableInstance instance1(1);
-    EXPECT_EQ(1, tracker.instances());
-    EXPECT_EQ(1, tracker.live_instances());
-    EXPECT_EQ(0, tracker.copies());
-    EXPECT_EQ(0, tracker.moves());
-    {
-      InstanceTracker tracker2;
-      CopyableMovableInstance instance2(instance1);
-      CopyableMovableInstance instance3(std::move(instance2));
-      EXPECT_EQ(3, tracker.instances());
-      EXPECT_EQ(2, tracker.live_instances());
-      EXPECT_EQ(1, tracker.copies());
-      EXPECT_EQ(1, tracker.moves());
-      EXPECT_EQ(2, tracker2.instances());
-      EXPECT_EQ(1, tracker2.live_instances());
-      EXPECT_EQ(1, tracker2.copies());
-      EXPECT_EQ(1, tracker2.moves());
-    }
-    EXPECT_EQ(1, tracker.instances());
-    EXPECT_EQ(1, tracker.live_instances());
-    EXPECT_EQ(1, tracker.copies());
-    EXPECT_EQ(1, tracker.moves());
-  }
-  EXPECT_EQ(0, tracker.instances());
-  EXPECT_EQ(0, tracker.live_instances());
-  EXPECT_EQ(1, tracker.copies());
-  EXPECT_EQ(1, tracker.moves());
-}
-
-TEST(TestInstanceTracker, Comparisons) {
-  InstanceTracker tracker;
-  MovableOnlyInstance one(1), two(2);
-
-  EXPECT_EQ(0, tracker.comparisons());
-  EXPECT_FALSE(one == two);
-  EXPECT_EQ(1, tracker.comparisons());
-  EXPECT_TRUE(one != two);
-  EXPECT_EQ(2, tracker.comparisons());
-  EXPECT_TRUE(one < two);
-  EXPECT_EQ(3, tracker.comparisons());
-  EXPECT_FALSE(one > two);
-  EXPECT_EQ(4, tracker.comparisons());
-  EXPECT_TRUE(one <= two);
-  EXPECT_EQ(5, tracker.comparisons());
-  EXPECT_FALSE(one >= two);
-  EXPECT_EQ(6, tracker.comparisons());
-  EXPECT_TRUE(one.compare(two) < 0);  // NOLINT
-  EXPECT_EQ(7, tracker.comparisons());
-
-  tracker.ResetCopiesMovesSwaps();
-  EXPECT_EQ(0, tracker.comparisons());
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/container/internal/tracked.h b/third_party/abseil/absl/container/internal/tracked.h
deleted file mode 100644
index 29f5829..0000000
--- a/third_party/abseil/absl/container/internal/tracked.h
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_TRACKED_H_
-#define ABSL_CONTAINER_INTERNAL_TRACKED_H_
-
-#include <stddef.h>
-
-#include <memory>
-#include <utility>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// A class that tracks its copies and moves so that it can be queried in tests.
-template <class T>
-class Tracked {
- public:
-  Tracked() {}
-  // NOLINTNEXTLINE(runtime/explicit)
-  Tracked(const T& val) : val_(val) {}
-  Tracked(const Tracked& that)
-      : val_(that.val_),
-        num_moves_(that.num_moves_),
-        num_copies_(that.num_copies_) {
-    ++(*num_copies_);
-  }
-  Tracked(Tracked&& that)
-      : val_(std::move(that.val_)),
-        num_moves_(std::move(that.num_moves_)),
-        num_copies_(std::move(that.num_copies_)) {
-    ++(*num_moves_);
-  }
-  Tracked& operator=(const Tracked& that) {
-    val_ = that.val_;
-    num_moves_ = that.num_moves_;
-    num_copies_ = that.num_copies_;
-    ++(*num_copies_);
-  }
-  Tracked& operator=(Tracked&& that) {
-    val_ = std::move(that.val_);
-    num_moves_ = std::move(that.num_moves_);
-    num_copies_ = std::move(that.num_copies_);
-    ++(*num_moves_);
-  }
-
-  const T& val() const { return val_; }
-
-  friend bool operator==(const Tracked& a, const Tracked& b) {
-    return a.val_ == b.val_;
-  }
-  friend bool operator!=(const Tracked& a, const Tracked& b) {
-    return !(a == b);
-  }
-
-  size_t num_copies() { return *num_copies_; }
-  size_t num_moves() { return *num_moves_; }
-
- private:
-  T val_;
-  std::shared_ptr<size_t> num_moves_ = std::make_shared<size_t>(0);
-  std::shared_ptr<size_t> num_copies_ = std::make_shared<size_t>(0);
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_TRACKED_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_map_constructor_test.h b/third_party/abseil/absl/container/internal/unordered_map_constructor_test.h
deleted file mode 100644
index 76ee95e..0000000
--- a/third_party/abseil/absl/container/internal/unordered_map_constructor_test.h
+++ /dev/null
@@ -1,489 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_CONSTRUCTOR_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_CONSTRUCTOR_TEST_H_
-
-#include <algorithm>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/hash_policy_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordMap>
-class ConstructorTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(ConstructorTest);
-
-TYPED_TEST_P(ConstructorTest, NoArgs) {
-  TypeParam m;
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCount) {
-  TypeParam m(123);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHash) {
-  using H = typename TypeParam::hasher;
-  H hasher;
-  TypeParam m(123, hasher);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHashEqual) {
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  H hasher;
-  E equal;
-  TypeParam m(123, hasher, equal);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHashEqualAlloc) {
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-template <typename T>
-struct is_std_unordered_map : std::false_type {};
-
-template <typename... T>
-struct is_std_unordered_map<std::unordered_map<T...>> : std::true_type {};
-
-#if defined(UNORDERED_MAP_CXX14) || defined(UNORDERED_MAP_CXX17)
-using has_cxx14_std_apis = std::true_type;
-#else
-using has_cxx14_std_apis = std::false_type;
-#endif
-
-template <typename T>
-using expect_cxx14_apis =
-    absl::disjunction<absl::negation<is_std_unordered_map<T>>,
-                      has_cxx14_std_apis>;
-
-template <typename TypeParam>
-void BucketCountAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void BucketCountAllocTest(std::true_type) {
-  using A = typename TypeParam::allocator_type;
-  A alloc(0);
-  TypeParam m(123, alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountAlloc) {
-  BucketCountAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-template <typename TypeParam>
-void BucketCountHashAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void BucketCountHashAllocTest(std::true_type) {
-  using H = typename TypeParam::hasher;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  A alloc(0);
-  TypeParam m(123, hasher, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHashAlloc) {
-  BucketCountHashAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-#if ABSL_UNORDERED_SUPPORTS_ALLOC_CTORS
-using has_alloc_std_constructors = std::true_type;
-#else
-using has_alloc_std_constructors = std::false_type;
-#endif
-
-template <typename T>
-using expect_alloc_constructors =
-    absl::disjunction<absl::negation<is_std_unordered_map<T>>,
-                      has_alloc_std_constructors>;
-
-template <typename TypeParam>
-void AllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void AllocTest(std::true_type) {
-  using A = typename TypeParam::allocator_type;
-  A alloc(0);
-  TypeParam m(alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(m, ::testing::UnorderedElementsAre());
-}
-
-TYPED_TEST_P(ConstructorTest, Alloc) {
-  AllocTest<TypeParam>(expect_alloc_constructors<TypeParam>());
-}
-
-TYPED_TEST_P(ConstructorTest, InputIteratorBucketHashEqualAlloc) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end(), 123, hasher, equal, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-template <typename TypeParam>
-void InputIteratorBucketAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InputIteratorBucketAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using A = typename TypeParam::allocator_type;
-  A alloc(0);
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end(), 123, alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InputIteratorBucketAlloc) {
-  InputIteratorBucketAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-template <typename TypeParam>
-void InputIteratorBucketHashAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InputIteratorBucketHashAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  A alloc(0);
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end(), 123, hasher, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InputIteratorBucketHashAlloc) {
-  InputIteratorBucketHashAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-TYPED_TEST_P(ConstructorTest, CopyConstructor) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam n(m);
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-template <typename TypeParam>
-void CopyConstructorAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void CopyConstructorAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam n(m, A(11));
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_NE(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, CopyConstructorAlloc) {
-  CopyConstructorAllocTest<TypeParam>(expect_alloc_constructors<TypeParam>());
-}
-
-// TODO(alkis): Test non-propagating allocators on copy constructors.
-
-TYPED_TEST_P(ConstructorTest, MoveConstructor) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam t(m);
-  TypeParam n(std::move(t));
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-template <typename TypeParam>
-void MoveConstructorAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void MoveConstructorAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam t(m);
-  TypeParam n(std::move(t), A(1));
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_NE(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, MoveConstructorAlloc) {
-  MoveConstructorAllocTest<TypeParam>(expect_alloc_constructors<TypeParam>());
-}
-
-// TODO(alkis): Test non-propagating allocators on move constructors.
-
-TYPED_TEST_P(ConstructorTest, InitializerListBucketHashEqualAlloc) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(values, 123, hasher, equal, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-template <typename TypeParam>
-void InitializerListBucketAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InitializerListBucketAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using A = typename TypeParam::allocator_type;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  A alloc(0);
-  TypeParam m(values, 123, alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InitializerListBucketAlloc) {
-  InitializerListBucketAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-template <typename TypeParam>
-void InitializerListBucketHashAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InitializerListBucketHashAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  A alloc(0);
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m(values, 123, hasher, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InitializerListBucketHashAlloc) {
-  InitializerListBucketHashAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-TYPED_TEST_P(ConstructorTest, Assignment) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()}, 123, hasher, equal, alloc);
-  TypeParam n;
-  n = m;
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m, n);
-}
-
-// TODO(alkis): Test [non-]propagating allocators on move/copy assignments
-// (it depends on traits).
-
-TYPED_TEST_P(ConstructorTest, MoveAssignment) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()}, 123, hasher, equal, alloc);
-  TypeParam t(m);
-  TypeParam n;
-  n = std::move(t);
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentFromInitializerList) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m;
-  m = values;
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentOverwritesExisting) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()});
-  TypeParam n({gen()});
-  n = m;
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, MoveAssignmentOverwritesExisting) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()});
-  TypeParam t(m);
-  TypeParam n({gen()});
-  n = std::move(t);
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentFromInitializerListOverwritesExisting) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m;
-  m = values;
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentOnSelf) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m(values);
-  m = *&m;  // Avoid -Wself-assign
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-// We cannot test self move as standard states that it leaves standard
-// containers in unspecified state (and in practice in causes memory-leak
-// according to heap-checker!).
-
-REGISTER_TYPED_TEST_CASE_P(
-    ConstructorTest, NoArgs, BucketCount, BucketCountHash, BucketCountHashEqual,
-    BucketCountHashEqualAlloc, BucketCountAlloc, BucketCountHashAlloc, Alloc,
-    InputIteratorBucketHashEqualAlloc, InputIteratorBucketAlloc,
-    InputIteratorBucketHashAlloc, CopyConstructor, CopyConstructorAlloc,
-    MoveConstructor, MoveConstructorAlloc, InitializerListBucketHashEqualAlloc,
-    InitializerListBucketAlloc, InitializerListBucketHashAlloc, Assignment,
-    MoveAssignment, AssignmentFromInitializerList, AssignmentOverwritesExisting,
-    MoveAssignmentOverwritesExisting,
-    AssignmentFromInitializerListOverwritesExisting, AssignmentOnSelf);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_CONSTRUCTOR_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_map_lookup_test.h b/third_party/abseil/absl/container/internal/unordered_map_lookup_test.h
deleted file mode 100644
index e76421e..0000000
--- a/third_party/abseil/absl/container/internal/unordered_map_lookup_test.h
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_LOOKUP_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_LOOKUP_TEST_H_
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/hash_policy_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordMap>
-class LookupTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(LookupTest);
-
-TYPED_TEST_P(LookupTest, At) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  for (const auto& p : values) {
-    const auto& val = m.at(p.first);
-    EXPECT_EQ(p.second, val) << ::testing::PrintToString(p.first);
-  }
-}
-
-TYPED_TEST_P(LookupTest, OperatorBracket) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& p : values) {
-    auto& val = m[p.first];
-    EXPECT_EQ(V(), val) << ::testing::PrintToString(p.first);
-    val = p.second;
-  }
-  for (const auto& p : values)
-    EXPECT_EQ(p.second, m[p.first]) << ::testing::PrintToString(p.first);
-}
-
-TYPED_TEST_P(LookupTest, Count) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& p : values)
-    EXPECT_EQ(0, m.count(p.first)) << ::testing::PrintToString(p.first);
-  m.insert(values.begin(), values.end());
-  for (const auto& p : values)
-    EXPECT_EQ(1, m.count(p.first)) << ::testing::PrintToString(p.first);
-}
-
-TYPED_TEST_P(LookupTest, Find) {
-  using std::get;
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& p : values)
-    EXPECT_TRUE(m.end() == m.find(p.first))
-        << ::testing::PrintToString(p.first);
-  m.insert(values.begin(), values.end());
-  for (const auto& p : values) {
-    auto it = m.find(p.first);
-    EXPECT_TRUE(m.end() != it) << ::testing::PrintToString(p.first);
-    EXPECT_EQ(p.second, get<1>(*it)) << ::testing::PrintToString(p.first);
-  }
-}
-
-TYPED_TEST_P(LookupTest, EqualRange) {
-  using std::get;
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& p : values) {
-    auto r = m.equal_range(p.first);
-    ASSERT_EQ(0, std::distance(r.first, r.second));
-  }
-  m.insert(values.begin(), values.end());
-  for (const auto& p : values) {
-    auto r = m.equal_range(p.first);
-    ASSERT_EQ(1, std::distance(r.first, r.second));
-    EXPECT_EQ(p.second, get<1>(*r.first)) << ::testing::PrintToString(p.first);
-  }
-}
-
-REGISTER_TYPED_TEST_CASE_P(LookupTest, At, OperatorBracket, Count, Find,
-                           EqualRange);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_LOOKUP_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_map_members_test.h b/third_party/abseil/absl/container/internal/unordered_map_members_test.h
deleted file mode 100644
index 7d48cdb..0000000
--- a/third_party/abseil/absl/container/internal/unordered_map_members_test.h
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MEMBERS_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MEMBERS_TEST_H_
-
-#include <type_traits>
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordMap>
-class MembersTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(MembersTest);
-
-template <typename T>
-void UseType() {}
-
-TYPED_TEST_P(MembersTest, Typedefs) {
-  EXPECT_TRUE((std::is_same<std::pair<const typename TypeParam::key_type,
-                                      typename TypeParam::mapped_type>,
-                            typename TypeParam::value_type>()));
-  EXPECT_TRUE((absl::conjunction<
-               absl::negation<std::is_signed<typename TypeParam::size_type>>,
-               std::is_integral<typename TypeParam::size_type>>()));
-  EXPECT_TRUE((absl::conjunction<
-               std::is_signed<typename TypeParam::difference_type>,
-               std::is_integral<typename TypeParam::difference_type>>()));
-  EXPECT_TRUE((std::is_convertible<
-               decltype(std::declval<const typename TypeParam::hasher&>()(
-                   std::declval<const typename TypeParam::key_type&>())),
-               size_t>()));
-  EXPECT_TRUE((std::is_convertible<
-               decltype(std::declval<const typename TypeParam::key_equal&>()(
-                   std::declval<const typename TypeParam::key_type&>(),
-                   std::declval<const typename TypeParam::key_type&>())),
-               bool>()));
-  EXPECT_TRUE((std::is_same<typename TypeParam::allocator_type::value_type,
-                            typename TypeParam::value_type>()));
-  EXPECT_TRUE((std::is_same<typename TypeParam::value_type&,
-                            typename TypeParam::reference>()));
-  EXPECT_TRUE((std::is_same<const typename TypeParam::value_type&,
-                            typename TypeParam::const_reference>()));
-  EXPECT_TRUE((std::is_same<typename std::allocator_traits<
-                                typename TypeParam::allocator_type>::pointer,
-                            typename TypeParam::pointer>()));
-  EXPECT_TRUE(
-      (std::is_same<typename std::allocator_traits<
-                        typename TypeParam::allocator_type>::const_pointer,
-                    typename TypeParam::const_pointer>()));
-}
-
-TYPED_TEST_P(MembersTest, SimpleFunctions) {
-  EXPECT_GT(TypeParam().max_size(), 0);
-}
-
-TYPED_TEST_P(MembersTest, BeginEnd) {
-  TypeParam t = {typename TypeParam::value_type{}};
-  EXPECT_EQ(t.begin(), t.cbegin());
-  EXPECT_EQ(t.end(), t.cend());
-  EXPECT_NE(t.begin(), t.end());
-  EXPECT_NE(t.cbegin(), t.cend());
-}
-
-REGISTER_TYPED_TEST_SUITE_P(MembersTest, Typedefs, SimpleFunctions, BeginEnd);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MEMBERS_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_map_modifiers_test.h b/third_party/abseil/absl/container/internal/unordered_map_modifiers_test.h
deleted file mode 100644
index 8c9ca77..0000000
--- a/third_party/abseil/absl/container/internal/unordered_map_modifiers_test.h
+++ /dev/null
@@ -1,318 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MODIFIERS_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MODIFIERS_TEST_H_
-
-#include <memory>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/hash_policy_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordMap>
-class ModifiersTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(ModifiersTest);
-
-TYPED_TEST_P(ModifiersTest, Clear) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  m.clear();
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAre());
-  EXPECT_TRUE(m.empty());
-}
-
-TYPED_TEST_P(ModifiersTest, Insert) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  auto p = m.insert(val);
-  EXPECT_TRUE(p.second);
-  EXPECT_EQ(val, *p.first);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  p = m.insert(val2);
-  EXPECT_FALSE(p.second);
-  EXPECT_EQ(val, *p.first);
-}
-
-TYPED_TEST_P(ModifiersTest, InsertHint) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  auto it = m.insert(m.end(), val);
-  EXPECT_TRUE(it != m.end());
-  EXPECT_EQ(val, *it);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  it = m.insert(it, val2);
-  EXPECT_TRUE(it != m.end());
-  EXPECT_EQ(val, *it);
-}
-
-TYPED_TEST_P(ModifiersTest, InsertRange) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  m.insert(values.begin(), values.end());
-  ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-TYPED_TEST_P(ModifiersTest, InsertOrAssign) {
-#ifdef UNORDERED_MAP_CXX17
-  using std::get;
-  using K = typename TypeParam::key_type;
-  using V = typename TypeParam::mapped_type;
-  K k = hash_internal::Generator<K>()();
-  V val = hash_internal::Generator<V>()();
-  TypeParam m;
-  auto p = m.insert_or_assign(k, val);
-  EXPECT_TRUE(p.second);
-  EXPECT_EQ(k, get<0>(*p.first));
-  EXPECT_EQ(val, get<1>(*p.first));
-  V val2 = hash_internal::Generator<V>()();
-  p = m.insert_or_assign(k, val2);
-  EXPECT_FALSE(p.second);
-  EXPECT_EQ(k, get<0>(*p.first));
-  EXPECT_EQ(val2, get<1>(*p.first));
-#endif
-}
-
-TYPED_TEST_P(ModifiersTest, InsertOrAssignHint) {
-#ifdef UNORDERED_MAP_CXX17
-  using std::get;
-  using K = typename TypeParam::key_type;
-  using V = typename TypeParam::mapped_type;
-  K k = hash_internal::Generator<K>()();
-  V val = hash_internal::Generator<V>()();
-  TypeParam m;
-  auto it = m.insert_or_assign(m.end(), k, val);
-  EXPECT_TRUE(it != m.end());
-  EXPECT_EQ(k, get<0>(*it));
-  EXPECT_EQ(val, get<1>(*it));
-  V val2 = hash_internal::Generator<V>()();
-  it = m.insert_or_assign(it, k, val2);
-  EXPECT_EQ(k, get<0>(*it));
-  EXPECT_EQ(val2, get<1>(*it));
-#endif
-}
-
-TYPED_TEST_P(ModifiersTest, Emplace) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  // TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
-  // with test traits/policy.
-  auto p = m.emplace(val);
-  EXPECT_TRUE(p.second);
-  EXPECT_EQ(val, *p.first);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  p = m.emplace(val2);
-  EXPECT_FALSE(p.second);
-  EXPECT_EQ(val, *p.first);
-}
-
-TYPED_TEST_P(ModifiersTest, EmplaceHint) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  // TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
-  // with test traits/policy.
-  auto it = m.emplace_hint(m.end(), val);
-  EXPECT_EQ(val, *it);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  it = m.emplace_hint(it, val2);
-  EXPECT_EQ(val, *it);
-}
-
-TYPED_TEST_P(ModifiersTest, TryEmplace) {
-#ifdef UNORDERED_MAP_CXX17
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  // TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
-  // with test traits/policy.
-  auto p = m.try_emplace(val.first, val.second);
-  EXPECT_TRUE(p.second);
-  EXPECT_EQ(val, *p.first);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  p = m.try_emplace(val2.first, val2.second);
-  EXPECT_FALSE(p.second);
-  EXPECT_EQ(val, *p.first);
-#endif
-}
-
-TYPED_TEST_P(ModifiersTest, TryEmplaceHint) {
-#ifdef UNORDERED_MAP_CXX17
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  // TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
-  // with test traits/policy.
-  auto it = m.try_emplace(m.end(), val.first, val.second);
-  EXPECT_EQ(val, *it);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  it = m.try_emplace(it, val2.first, val2.second);
-  EXPECT_EQ(val, *it);
-#endif
-}
-
-template <class V>
-using IfNotVoid = typename std::enable_if<!std::is_void<V>::value, V>::type;
-
-// In openmap we chose not to return the iterator from erase because that's
-// more expensive. As such we adapt erase to return an iterator here.
-struct EraseFirst {
-  template <class Map>
-  auto operator()(Map* m, int) const
-      -> IfNotVoid<decltype(m->erase(m->begin()))> {
-    return m->erase(m->begin());
-  }
-  template <class Map>
-  typename Map::iterator operator()(Map* m, ...) const {
-    auto it = m->begin();
-    m->erase(it++);
-    return it;
-  }
-};
-
-TYPED_TEST_P(ModifiersTest, Erase) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using std::get;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  auto& first = *m.begin();
-  std::vector<T> values2;
-  for (const auto& val : values)
-    if (get<0>(val) != get<0>(first)) values2.push_back(val);
-  auto it = EraseFirst()(&m, 0);
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(1, std::count(values2.begin(), values2.end(), *it));
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values2.begin(),
-                                                             values2.end()));
-}
-
-TYPED_TEST_P(ModifiersTest, EraseRange) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  auto it = m.erase(m.begin(), m.end());
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAre());
-  EXPECT_TRUE(it == m.end());
-}
-
-TYPED_TEST_P(ModifiersTest, EraseKey) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(items(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_EQ(1, m.erase(values[0].first));
-  EXPECT_EQ(0, std::count(m.begin(), m.end(), values[0]));
-  EXPECT_THAT(items(m), ::testing::UnorderedElementsAreArray(values.begin() + 1,
-                                                             values.end()));
-}
-
-TYPED_TEST_P(ModifiersTest, Swap) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> v1;
-  std::vector<T> v2;
-  std::generate_n(std::back_inserter(v1), 5, hash_internal::Generator<T>());
-  std::generate_n(std::back_inserter(v2), 5, hash_internal::Generator<T>());
-  TypeParam m1(v1.begin(), v1.end());
-  TypeParam m2(v2.begin(), v2.end());
-  EXPECT_THAT(items(m1), ::testing::UnorderedElementsAreArray(v1));
-  EXPECT_THAT(items(m2), ::testing::UnorderedElementsAreArray(v2));
-  m1.swap(m2);
-  EXPECT_THAT(items(m1), ::testing::UnorderedElementsAreArray(v2));
-  EXPECT_THAT(items(m2), ::testing::UnorderedElementsAreArray(v1));
-}
-
-// TODO(alkis): Write tests for extract.
-// TODO(alkis): Write tests for merge.
-
-REGISTER_TYPED_TEST_CASE_P(ModifiersTest, Clear, Insert, InsertHint,
-                           InsertRange, InsertOrAssign, InsertOrAssignHint,
-                           Emplace, EmplaceHint, TryEmplace, TryEmplaceHint,
-                           Erase, EraseRange, EraseKey, Swap);
-
-template <typename Type>
-struct is_unique_ptr : std::false_type {};
-
-template <typename Type>
-struct is_unique_ptr<std::unique_ptr<Type>> : std::true_type {};
-
-template <class UnordMap>
-class UniquePtrModifiersTest : public ::testing::Test {
- protected:
-  UniquePtrModifiersTest() {
-    static_assert(is_unique_ptr<typename UnordMap::mapped_type>::value,
-                  "UniquePtrModifiersTyest may only be called with a "
-                  "std::unique_ptr value type.");
-  }
-};
-
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(UniquePtrModifiersTest);
-
-TYPED_TEST_SUITE_P(UniquePtrModifiersTest);
-
-// Test that we do not move from rvalue arguments if an insertion does not
-// happen.
-TYPED_TEST_P(UniquePtrModifiersTest, TryEmplace) {
-#ifdef UNORDERED_MAP_CXX17
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using V = typename TypeParam::mapped_type;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  auto p = m.try_emplace(val.first, std::move(val.second));
-  EXPECT_TRUE(p.second);
-  // A moved from std::unique_ptr is guaranteed to be nullptr.
-  EXPECT_EQ(val.second, nullptr);
-  T val2 = {val.first, hash_internal::Generator<V>()()};
-  p = m.try_emplace(val2.first, std::move(val2.second));
-  EXPECT_FALSE(p.second);
-  EXPECT_NE(val2.second, nullptr);
-#endif
-}
-
-REGISTER_TYPED_TEST_SUITE_P(UniquePtrModifiersTest, TryEmplace);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MODIFIERS_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_map_test.cc b/third_party/abseil/absl/container/internal/unordered_map_test.cc
deleted file mode 100644
index 9cbf512..0000000
--- a/third_party/abseil/absl/container/internal/unordered_map_test.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <memory>
-#include <unordered_map>
-
-#include "absl/container/internal/unordered_map_constructor_test.h"
-#include "absl/container/internal/unordered_map_lookup_test.h"
-#include "absl/container/internal/unordered_map_members_test.h"
-#include "absl/container/internal/unordered_map_modifiers_test.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using MapTypes = ::testing::Types<
-    std::unordered_map<int, int, StatefulTestingHash, StatefulTestingEqual,
-                       Alloc<std::pair<const int, int>>>,
-    std::unordered_map<std::string, std::string, StatefulTestingHash,
-                       StatefulTestingEqual,
-                       Alloc<std::pair<const std::string, std::string>>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedMap, ConstructorTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedMap, LookupTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedMap, MembersTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedMap, ModifiersTest, MapTypes);
-
-using UniquePtrMapTypes = ::testing::Types<std::unordered_map<
-    int, std::unique_ptr<int>, StatefulTestingHash, StatefulTestingEqual,
-    Alloc<std::pair<const int, std::unique_ptr<int>>>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedMap, UniquePtrModifiersTest,
-                               UniquePtrMapTypes);
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/internal/unordered_set_constructor_test.h b/third_party/abseil/absl/container/internal/unordered_set_constructor_test.h
deleted file mode 100644
index 41165b0..0000000
--- a/third_party/abseil/absl/container/internal/unordered_set_constructor_test.h
+++ /dev/null
@@ -1,496 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_SET_CONSTRUCTOR_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_SET_CONSTRUCTOR_TEST_H_
-
-#include <algorithm>
-#include <unordered_set>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/hash_policy_testing.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordMap>
-class ConstructorTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(ConstructorTest);
-
-TYPED_TEST_P(ConstructorTest, NoArgs) {
-  TypeParam m;
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCount) {
-  TypeParam m(123);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHash) {
-  using H = typename TypeParam::hasher;
-  H hasher;
-  TypeParam m(123, hasher);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHashEqual) {
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  H hasher;
-  E equal;
-  TypeParam m(123, hasher, equal);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHashEqualAlloc) {
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-
-  const auto& cm = m;
-  EXPECT_EQ(cm.hash_function(), hasher);
-  EXPECT_EQ(cm.key_eq(), equal);
-  EXPECT_EQ(cm.get_allocator(), alloc);
-  EXPECT_TRUE(cm.empty());
-  EXPECT_THAT(keys(cm), ::testing::UnorderedElementsAre());
-  EXPECT_GE(cm.bucket_count(), 123);
-}
-
-template <typename T>
-struct is_std_unordered_set : std::false_type {};
-
-template <typename... T>
-struct is_std_unordered_set<std::unordered_set<T...>> : std::true_type {};
-
-#if defined(UNORDERED_SET_CXX14) || defined(UNORDERED_SET_CXX17)
-using has_cxx14_std_apis = std::true_type;
-#else
-using has_cxx14_std_apis = std::false_type;
-#endif
-
-template <typename T>
-using expect_cxx14_apis =
-    absl::disjunction<absl::negation<is_std_unordered_set<T>>,
-                      has_cxx14_std_apis>;
-
-template <typename TypeParam>
-void BucketCountAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void BucketCountAllocTest(std::true_type) {
-  using A = typename TypeParam::allocator_type;
-  A alloc(0);
-  TypeParam m(123, alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountAlloc) {
-  BucketCountAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-template <typename TypeParam>
-void BucketCountHashAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void BucketCountHashAllocTest(std::true_type) {
-  using H = typename TypeParam::hasher;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  A alloc(0);
-  TypeParam m(123, hasher, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, BucketCountHashAlloc) {
-  BucketCountHashAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-#if ABSL_UNORDERED_SUPPORTS_ALLOC_CTORS
-using has_alloc_std_constructors = std::true_type;
-#else
-using has_alloc_std_constructors = std::false_type;
-#endif
-
-template <typename T>
-using expect_alloc_constructors =
-    absl::disjunction<absl::negation<is_std_unordered_set<T>>,
-                      has_alloc_std_constructors>;
-
-template <typename TypeParam>
-void AllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void AllocTest(std::true_type) {
-  using A = typename TypeParam::allocator_type;
-  A alloc(0);
-  TypeParam m(alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_TRUE(m.empty());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-}
-
-TYPED_TEST_P(ConstructorTest, Alloc) {
-  AllocTest<TypeParam>(expect_alloc_constructors<TypeParam>());
-}
-
-TYPED_TEST_P(ConstructorTest, InputIteratorBucketHashEqualAlloc) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  std::vector<T> values;
-  for (size_t i = 0; i != 10; ++i)
-    values.push_back(hash_internal::Generator<T>()());
-  TypeParam m(values.begin(), values.end(), 123, hasher, equal, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-template <typename TypeParam>
-void InputIteratorBucketAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InputIteratorBucketAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using A = typename TypeParam::allocator_type;
-  A alloc(0);
-  std::vector<T> values;
-  for (size_t i = 0; i != 10; ++i)
-    values.push_back(hash_internal::Generator<T>()());
-  TypeParam m(values.begin(), values.end(), 123, alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InputIteratorBucketAlloc) {
-  InputIteratorBucketAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-template <typename TypeParam>
-void InputIteratorBucketHashAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InputIteratorBucketHashAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  A alloc(0);
-  std::vector<T> values;
-  for (size_t i = 0; i != 10; ++i)
-    values.push_back(hash_internal::Generator<T>()());
-  TypeParam m(values.begin(), values.end(), 123, hasher, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InputIteratorBucketHashAlloc) {
-  InputIteratorBucketHashAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-TYPED_TEST_P(ConstructorTest, CopyConstructor) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam n(m);
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-  EXPECT_NE(TypeParam(0, hasher, equal, alloc), n);
-}
-
-template <typename TypeParam>
-void CopyConstructorAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void CopyConstructorAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam n(m, A(11));
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_NE(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, CopyConstructorAlloc) {
-  CopyConstructorAllocTest<TypeParam>(expect_alloc_constructors<TypeParam>());
-}
-
-// TODO(alkis): Test non-propagating allocators on copy constructors.
-
-TYPED_TEST_P(ConstructorTest, MoveConstructor) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam t(m);
-  TypeParam n(std::move(t));
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-template <typename TypeParam>
-void MoveConstructorAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void MoveConstructorAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(123, hasher, equal, alloc);
-  for (size_t i = 0; i != 10; ++i) m.insert(hash_internal::Generator<T>()());
-  TypeParam t(m);
-  TypeParam n(std::move(t), A(1));
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_NE(m.get_allocator(), n.get_allocator());
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, MoveConstructorAlloc) {
-  MoveConstructorAllocTest<TypeParam>(expect_alloc_constructors<TypeParam>());
-}
-
-// TODO(alkis): Test non-propagating allocators on move constructors.
-
-TYPED_TEST_P(ConstructorTest, InitializerListBucketHashEqualAlloc) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  TypeParam m(values, 123, hasher, equal, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.key_eq(), equal);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-template <typename TypeParam>
-void InitializerListBucketAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InitializerListBucketAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using A = typename TypeParam::allocator_type;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  A alloc(0);
-  TypeParam m(values, 123, alloc);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InitializerListBucketAlloc) {
-  InitializerListBucketAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-template <typename TypeParam>
-void InitializerListBucketHashAllocTest(std::false_type) {}
-
-template <typename TypeParam>
-void InitializerListBucketHashAllocTest(std::true_type) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  A alloc(0);
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m(values, 123, hasher, alloc);
-  EXPECT_EQ(m.hash_function(), hasher);
-  EXPECT_EQ(m.get_allocator(), alloc);
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_GE(m.bucket_count(), 123);
-}
-
-TYPED_TEST_P(ConstructorTest, InitializerListBucketHashAlloc) {
-  InitializerListBucketHashAllocTest<TypeParam>(expect_cxx14_apis<TypeParam>());
-}
-
-TYPED_TEST_P(ConstructorTest, CopyAssignment) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()}, 123, hasher, equal, alloc);
-  TypeParam n;
-  n = m;
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m, n);
-}
-
-// TODO(alkis): Test [non-]propagating allocators on move/copy assignments
-// (it depends on traits).
-
-TYPED_TEST_P(ConstructorTest, MoveAssignment) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  using H = typename TypeParam::hasher;
-  using E = typename TypeParam::key_equal;
-  using A = typename TypeParam::allocator_type;
-  H hasher;
-  E equal;
-  A alloc(0);
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()}, 123, hasher, equal, alloc);
-  TypeParam t(m);
-  TypeParam n;
-  n = std::move(t);
-  EXPECT_EQ(m.hash_function(), n.hash_function());
-  EXPECT_EQ(m.key_eq(), n.key_eq());
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentFromInitializerList) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m;
-  m = values;
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentOverwritesExisting) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()});
-  TypeParam n({gen()});
-  n = m;
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, MoveAssignmentOverwritesExisting) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  TypeParam m({gen(), gen(), gen()});
-  TypeParam t(m);
-  TypeParam n({gen()});
-  n = std::move(t);
-  EXPECT_EQ(m, n);
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentFromInitializerListOverwritesExisting) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m;
-  m = values;
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-TYPED_TEST_P(ConstructorTest, AssignmentOnSelf) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  hash_internal::Generator<T> gen;
-  std::initializer_list<T> values = {gen(), gen(), gen(), gen(), gen()};
-  TypeParam m(values);
-  m = *&m;  // Avoid -Wself-assign.
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-REGISTER_TYPED_TEST_CASE_P(
-    ConstructorTest, NoArgs, BucketCount, BucketCountHash, BucketCountHashEqual,
-    BucketCountHashEqualAlloc, BucketCountAlloc, BucketCountHashAlloc, Alloc,
-    InputIteratorBucketHashEqualAlloc, InputIteratorBucketAlloc,
-    InputIteratorBucketHashAlloc, CopyConstructor, CopyConstructorAlloc,
-    MoveConstructor, MoveConstructorAlloc, InitializerListBucketHashEqualAlloc,
-    InitializerListBucketAlloc, InitializerListBucketHashAlloc, CopyAssignment,
-    MoveAssignment, AssignmentFromInitializerList, AssignmentOverwritesExisting,
-    MoveAssignmentOverwritesExisting,
-    AssignmentFromInitializerListOverwritesExisting, AssignmentOnSelf);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_SET_CONSTRUCTOR_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_set_lookup_test.h b/third_party/abseil/absl/container/internal/unordered_set_lookup_test.h
deleted file mode 100644
index 8f2f4b2..0000000
--- a/third_party/abseil/absl/container/internal/unordered_set_lookup_test.h
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_SET_LOOKUP_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_SET_LOOKUP_TEST_H_
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/hash_policy_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordSet>
-class LookupTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(LookupTest);
-
-TYPED_TEST_P(LookupTest, Count) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& v : values)
-    EXPECT_EQ(0, m.count(v)) << ::testing::PrintToString(v);
-  m.insert(values.begin(), values.end());
-  for (const auto& v : values)
-    EXPECT_EQ(1, m.count(v)) << ::testing::PrintToString(v);
-}
-
-TYPED_TEST_P(LookupTest, Find) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& v : values)
-    EXPECT_TRUE(m.end() == m.find(v)) << ::testing::PrintToString(v);
-  m.insert(values.begin(), values.end());
-  for (const auto& v : values) {
-    typename TypeParam::iterator it = m.find(v);
-    static_assert(std::is_same<const typename TypeParam::value_type&,
-                               decltype(*it)>::value,
-                  "");
-    static_assert(std::is_same<const typename TypeParam::value_type*,
-                               decltype(it.operator->())>::value,
-                  "");
-    EXPECT_TRUE(m.end() != it) << ::testing::PrintToString(v);
-    EXPECT_EQ(v, *it) << ::testing::PrintToString(v);
-  }
-}
-
-TYPED_TEST_P(LookupTest, EqualRange) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  for (const auto& v : values) {
-    auto r = m.equal_range(v);
-    ASSERT_EQ(0, std::distance(r.first, r.second));
-  }
-  m.insert(values.begin(), values.end());
-  for (const auto& v : values) {
-    auto r = m.equal_range(v);
-    ASSERT_EQ(1, std::distance(r.first, r.second));
-    EXPECT_EQ(v, *r.first);
-  }
-}
-
-REGISTER_TYPED_TEST_CASE_P(LookupTest, Count, Find, EqualRange);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_SET_LOOKUP_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_set_members_test.h b/third_party/abseil/absl/container/internal/unordered_set_members_test.h
deleted file mode 100644
index 4c5e104..0000000
--- a/third_party/abseil/absl/container/internal/unordered_set_members_test.h
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_SET_MEMBERS_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_SET_MEMBERS_TEST_H_
-
-#include <type_traits>
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordSet>
-class MembersTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(MembersTest);
-
-template <typename T>
-void UseType() {}
-
-TYPED_TEST_P(MembersTest, Typedefs) {
-  EXPECT_TRUE((std::is_same<typename TypeParam::key_type,
-                            typename TypeParam::value_type>()));
-  EXPECT_TRUE((absl::conjunction<
-               absl::negation<std::is_signed<typename TypeParam::size_type>>,
-               std::is_integral<typename TypeParam::size_type>>()));
-  EXPECT_TRUE((absl::conjunction<
-               std::is_signed<typename TypeParam::difference_type>,
-               std::is_integral<typename TypeParam::difference_type>>()));
-  EXPECT_TRUE((std::is_convertible<
-               decltype(std::declval<const typename TypeParam::hasher&>()(
-                   std::declval<const typename TypeParam::key_type&>())),
-               size_t>()));
-  EXPECT_TRUE((std::is_convertible<
-               decltype(std::declval<const typename TypeParam::key_equal&>()(
-                   std::declval<const typename TypeParam::key_type&>(),
-                   std::declval<const typename TypeParam::key_type&>())),
-               bool>()));
-  EXPECT_TRUE((std::is_same<typename TypeParam::allocator_type::value_type,
-                            typename TypeParam::value_type>()));
-  EXPECT_TRUE((std::is_same<typename TypeParam::value_type&,
-                            typename TypeParam::reference>()));
-  EXPECT_TRUE((std::is_same<const typename TypeParam::value_type&,
-                            typename TypeParam::const_reference>()));
-  EXPECT_TRUE((std::is_same<typename std::allocator_traits<
-                                typename TypeParam::allocator_type>::pointer,
-                            typename TypeParam::pointer>()));
-  EXPECT_TRUE(
-      (std::is_same<typename std::allocator_traits<
-                        typename TypeParam::allocator_type>::const_pointer,
-                    typename TypeParam::const_pointer>()));
-}
-
-TYPED_TEST_P(MembersTest, SimpleFunctions) {
-  EXPECT_GT(TypeParam().max_size(), 0);
-}
-
-TYPED_TEST_P(MembersTest, BeginEnd) {
-  TypeParam t = {typename TypeParam::value_type{}};
-  EXPECT_EQ(t.begin(), t.cbegin());
-  EXPECT_EQ(t.end(), t.cend());
-  EXPECT_NE(t.begin(), t.end());
-  EXPECT_NE(t.cbegin(), t.cend());
-}
-
-REGISTER_TYPED_TEST_SUITE_P(MembersTest, Typedefs, SimpleFunctions, BeginEnd);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_SET_MEMBERS_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_set_modifiers_test.h b/third_party/abseil/absl/container/internal/unordered_set_modifiers_test.h
deleted file mode 100644
index 26be58d..0000000
--- a/third_party/abseil/absl/container/internal/unordered_set_modifiers_test.h
+++ /dev/null
@@ -1,190 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_SET_MODIFIERS_TEST_H_
-#define ABSL_CONTAINER_INTERNAL_UNORDERED_SET_MODIFIERS_TEST_H_
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/hash_generator_testing.h"
-#include "absl/container/internal/hash_policy_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-template <class UnordSet>
-class ModifiersTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(ModifiersTest);
-
-TYPED_TEST_P(ModifiersTest, Clear) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  m.clear();
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_TRUE(m.empty());
-}
-
-TYPED_TEST_P(ModifiersTest, Insert) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  auto p = m.insert(val);
-  EXPECT_TRUE(p.second);
-  EXPECT_EQ(val, *p.first);
-  p = m.insert(val);
-  EXPECT_FALSE(p.second);
-}
-
-TYPED_TEST_P(ModifiersTest, InsertHint) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  auto it = m.insert(m.end(), val);
-  EXPECT_TRUE(it != m.end());
-  EXPECT_EQ(val, *it);
-  it = m.insert(it, val);
-  EXPECT_TRUE(it != m.end());
-  EXPECT_EQ(val, *it);
-}
-
-TYPED_TEST_P(ModifiersTest, InsertRange) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m;
-  m.insert(values.begin(), values.end());
-  ASSERT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-}
-
-TYPED_TEST_P(ModifiersTest, Emplace) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  // TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
-  // with test traits/policy.
-  auto p = m.emplace(val);
-  EXPECT_TRUE(p.second);
-  EXPECT_EQ(val, *p.first);
-  p = m.emplace(val);
-  EXPECT_FALSE(p.second);
-  EXPECT_EQ(val, *p.first);
-}
-
-TYPED_TEST_P(ModifiersTest, EmplaceHint) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  T val = hash_internal::Generator<T>()();
-  TypeParam m;
-  // TODO(alkis): We need a way to run emplace in a more meaningful way. Perhaps
-  // with test traits/policy.
-  auto it = m.emplace_hint(m.end(), val);
-  EXPECT_EQ(val, *it);
-  it = m.emplace_hint(it, val);
-  EXPECT_EQ(val, *it);
-}
-
-template <class V>
-using IfNotVoid = typename std::enable_if<!std::is_void<V>::value, V>::type;
-
-// In openmap we chose not to return the iterator from erase because that's
-// more expensive. As such we adapt erase to return an iterator here.
-struct EraseFirst {
-  template <class Map>
-  auto operator()(Map* m, int) const
-      -> IfNotVoid<decltype(m->erase(m->begin()))> {
-    return m->erase(m->begin());
-  }
-  template <class Map>
-  typename Map::iterator operator()(Map* m, ...) const {
-    auto it = m->begin();
-    m->erase(it++);
-    return it;
-  }
-};
-
-TYPED_TEST_P(ModifiersTest, Erase) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  std::vector<T> values2;
-  for (const auto& val : values)
-    if (val != *m.begin()) values2.push_back(val);
-  auto it = EraseFirst()(&m, 0);
-  ASSERT_TRUE(it != m.end());
-  EXPECT_EQ(1, std::count(values2.begin(), values2.end(), *it));
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values2.begin(),
-                                                            values2.end()));
-}
-
-TYPED_TEST_P(ModifiersTest, EraseRange) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  auto it = m.erase(m.begin(), m.end());
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAre());
-  EXPECT_TRUE(it == m.end());
-}
-
-TYPED_TEST_P(ModifiersTest, EraseKey) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> values;
-  std::generate_n(std::back_inserter(values), 10,
-                  hash_internal::Generator<T>());
-  TypeParam m(values.begin(), values.end());
-  ASSERT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values));
-  EXPECT_EQ(1, m.erase(values[0]));
-  EXPECT_EQ(0, std::count(m.begin(), m.end(), values[0]));
-  EXPECT_THAT(keys(m), ::testing::UnorderedElementsAreArray(values.begin() + 1,
-                                                            values.end()));
-}
-
-TYPED_TEST_P(ModifiersTest, Swap) {
-  using T = hash_internal::GeneratedType<TypeParam>;
-  std::vector<T> v1;
-  std::vector<T> v2;
-  std::generate_n(std::back_inserter(v1), 5, hash_internal::Generator<T>());
-  std::generate_n(std::back_inserter(v2), 5, hash_internal::Generator<T>());
-  TypeParam m1(v1.begin(), v1.end());
-  TypeParam m2(v2.begin(), v2.end());
-  EXPECT_THAT(keys(m1), ::testing::UnorderedElementsAreArray(v1));
-  EXPECT_THAT(keys(m2), ::testing::UnorderedElementsAreArray(v2));
-  m1.swap(m2);
-  EXPECT_THAT(keys(m1), ::testing::UnorderedElementsAreArray(v2));
-  EXPECT_THAT(keys(m2), ::testing::UnorderedElementsAreArray(v1));
-}
-
-// TODO(alkis): Write tests for extract.
-// TODO(alkis): Write tests for merge.
-
-REGISTER_TYPED_TEST_CASE_P(ModifiersTest, Clear, Insert, InsertHint,
-                           InsertRange, Emplace, EmplaceHint, Erase, EraseRange,
-                           EraseKey, Swap);
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_SET_MODIFIERS_TEST_H_
diff --git a/third_party/abseil/absl/container/internal/unordered_set_test.cc b/third_party/abseil/absl/container/internal/unordered_set_test.cc
deleted file mode 100644
index a134b53..0000000
--- a/third_party/abseil/absl/container/internal/unordered_set_test.cc
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <unordered_set>
-
-#include "absl/container/internal/unordered_set_constructor_test.h"
-#include "absl/container/internal/unordered_set_lookup_test.h"
-#include "absl/container/internal/unordered_set_members_test.h"
-#include "absl/container/internal/unordered_set_modifiers_test.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using SetTypes = ::testing::Types<
-    std::unordered_set<int, StatefulTestingHash, StatefulTestingEqual,
-                       Alloc<int>>,
-    std::unordered_set<std::string, StatefulTestingHash, StatefulTestingEqual,
-                       Alloc<std::string>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedSet, ConstructorTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedSet, LookupTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedSet, MembersTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(UnorderedSet, ModifiersTest, SetTypes);
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/node_hash_map.h b/third_party/abseil/absl/container/node_hash_map.h
deleted file mode 100644
index 7a39f62..0000000
--- a/third_party/abseil/absl/container/node_hash_map.h
+++ /dev/null
@@ -1,597 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: node_hash_map.h
-// -----------------------------------------------------------------------------
-//
-// An `absl::node_hash_map<K, V>` is an unordered associative container of
-// unique keys and associated values designed to be a more efficient replacement
-// for `std::unordered_map`. Like `unordered_map`, search, insertion, and
-// deletion of map elements can be done as an `O(1)` operation. However,
-// `node_hash_map` (and other unordered associative containers known as the
-// collection of Abseil "Swiss tables") contain other optimizations that result
-// in both memory and computation advantages.
-//
-// In most cases, your default choice for a hash map should be a map of type
-// `flat_hash_map`. However, if you need pointer stability and cannot store
-// a `flat_hash_map` with `unique_ptr` elements, a `node_hash_map` may be a
-// valid alternative. As well, if you are migrating your code from using
-// `std::unordered_map`, a `node_hash_map` provides a more straightforward
-// migration, because it guarantees pointer stability. Consider migrating to
-// `node_hash_map` and perhaps converting to a more efficient `flat_hash_map`
-// upon further review.
-
-#ifndef ABSL_CONTAINER_NODE_HASH_MAP_H_
-#define ABSL_CONTAINER_NODE_HASH_MAP_H_
-
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/algorithm/container.h"
-#include "absl/container/internal/container_memory.h"
-#include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
-#include "absl/container/internal/node_hash_policy.h"
-#include "absl/container/internal/raw_hash_map.h"  // IWYU pragma: export
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-template <class Key, class Value>
-class NodeHashMapPolicy;
-}  // namespace container_internal
-
-// -----------------------------------------------------------------------------
-// absl::node_hash_map
-// -----------------------------------------------------------------------------
-//
-// An `absl::node_hash_map<K, V>` is an unordered associative container which
-// has been optimized for both speed and memory footprint in most common use
-// cases. Its interface is similar to that of `std::unordered_map<K, V>` with
-// the following notable differences:
-//
-// * Supports heterogeneous lookup, through `find()`, `operator[]()` and
-//   `insert()`, provided that the map is provided a compatible heterogeneous
-//   hashing function and equality operator.
-// * Contains a `capacity()` member function indicating the number of element
-//   slots (open, deleted, and empty) within the hash map.
-// * Returns `void` from the `erase(iterator)` overload.
-//
-// By default, `node_hash_map` uses the `absl::Hash` hashing framework.
-// All fundamental and Abseil types that support the `absl::Hash` framework have
-// a compatible equality operator for comparing insertions into `node_hash_map`.
-// If your type is not yet supported by the `absl::Hash` framework, see
-// absl/hash/hash.h for information on extending Abseil hashing to user-defined
-// types.
-//
-// Example:
-//
-//   // Create a node hash map of three strings (that map to strings)
-//   absl::node_hash_map<std::string, std::string> ducks =
-//     {{"a", "huey"}, {"b", "dewey"}, {"c", "louie"}};
-//
-//  // Insert a new element into the node hash map
-//  ducks.insert({"d", "donald"}};
-//
-//  // Force a rehash of the node hash map
-//  ducks.rehash(0);
-//
-//  // Find the element with the key "b"
-//  std::string search_key = "b";
-//  auto result = ducks.find(search_key);
-//  if (result != ducks.end()) {
-//    std::cout << "Result: " << result->second << std::endl;
-//  }
-template <class Key, class Value,
-          class Hash = absl::container_internal::hash_default_hash<Key>,
-          class Eq = absl::container_internal::hash_default_eq<Key>,
-          class Alloc = std::allocator<std::pair<const Key, Value>>>
-class node_hash_map
-    : public absl::container_internal::raw_hash_map<
-          absl::container_internal::NodeHashMapPolicy<Key, Value>, Hash, Eq,
-          Alloc> {
-  using Base = typename node_hash_map::raw_hash_map;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A node_hash_map supports the same overload set as `std::unordered_map`
-  // for construction and assignment:
-  //
-  // *  Default constructor
-  //
-  //    // No allocation for the table's elements is made.
-  //    absl::node_hash_map<int, std::string> map1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::node_hash_map<int, std::string> map2 =
-  //       {{1, "huey"}, {2, "dewey"}, {3, "louie"},};
-  //
-  // * Copy constructor
-  //
-  //   absl::node_hash_map<int, std::string> map3(map2);
-  //
-  // * Copy assignment operator
-  //
-  //  // Hash functor and Comparator are copied as well
-  //  absl::node_hash_map<int, std::string> map4;
-  //  map4 = map3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::node_hash_map<int, std::string> map5(std::move(map4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::node_hash_map<int, std::string> map6;
-  //   map6 = std::move(map5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::pair<int, std::string>> v = {{1, "a"}, {2, "b"}};
-  //   absl::node_hash_map<int, std::string> map7(v.begin(), v.end());
-  node_hash_map() {}
-  using Base::Base;
-
-  // node_hash_map::begin()
-  //
-  // Returns an iterator to the beginning of the `node_hash_map`.
-  using Base::begin;
-
-  // node_hash_map::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `node_hash_map`.
-  using Base::cbegin;
-
-  // node_hash_map::cend()
-  //
-  // Returns a const iterator to the end of the `node_hash_map`.
-  using Base::cend;
-
-  // node_hash_map::end()
-  //
-  // Returns an iterator to the end of the `node_hash_map`.
-  using Base::end;
-
-  // node_hash_map::capacity()
-  //
-  // Returns the number of element slots (assigned, deleted, and empty)
-  // available within the `node_hash_map`.
-  //
-  // NOTE: this member function is particular to `absl::node_hash_map` and is
-  // not provided in the `std::unordered_map` API.
-  using Base::capacity;
-
-  // node_hash_map::empty()
-  //
-  // Returns whether or not the `node_hash_map` is empty.
-  using Base::empty;
-
-  // node_hash_map::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `node_hash_map` under current memory constraints. This value can be thought
-  // of as the largest value of `std::distance(begin(), end())` for a
-  // `node_hash_map<K, V>`.
-  using Base::max_size;
-
-  // node_hash_map::size()
-  //
-  // Returns the number of elements currently within the `node_hash_map`.
-  using Base::size;
-
-  // node_hash_map::clear()
-  //
-  // Removes all elements from the `node_hash_map`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  //
-  // NOTE: this operation may shrink the underlying buffer. To avoid shrinking
-  // the underlying buffer call `erase(begin(), end())`.
-  using Base::clear;
-
-  // node_hash_map::erase()
-  //
-  // Erases elements within the `node_hash_map`. Erasing does not trigger a
-  // rehash. Overloads are listed below.
-  //
-  // void erase(const_iterator pos):
-  //
-  //   Erases the element at `position` of the `node_hash_map`, returning
-  //   `void`.
-  //
-  //   NOTE: this return behavior is different than that of STL containers in
-  //   general and `std::unordered_map` in particular.
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning an
-  //   iterator pointing to `last`.
-  //
-  // size_type erase(const key_type& key):
-  //
-  //   Erases the element with the matching key, if it exists, returning the
-  //   number of elements erased (0 or 1).
-  using Base::erase;
-
-  // node_hash_map::insert()
-  //
-  // Inserts an element of the specified value into the `node_hash_map`,
-  // returning an iterator pointing to the newly inserted element, provided that
-  // an element with the given key does not already exist. If rehashing occurs
-  // due to the insertion, all iterators are invalidated. Overloads are listed
-  // below.
-  //
-  // std::pair<iterator,bool> insert(const init_type& value):
-  //
-  //   Inserts a value into the `node_hash_map`. Returns a pair consisting of an
-  //   iterator to the inserted element (or to the element that prevented the
-  //   insertion) and a `bool` denoting whether the insertion took place.
-  //
-  // std::pair<iterator,bool> insert(T&& value):
-  // std::pair<iterator,bool> insert(init_type&& value):
-  //
-  //   Inserts a moveable value into the `node_hash_map`. Returns a `std::pair`
-  //   consisting of an iterator to the inserted element (or to the element that
-  //   prevented the insertion) and a `bool` denoting whether the insertion took
-  //   place.
-  //
-  // iterator insert(const_iterator hint, const init_type& value):
-  // iterator insert(const_iterator hint, T&& value):
-  // iterator insert(const_iterator hint, init_type&& value);
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element, or to the existing element that prevented the
-  //   insertion.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently, for `node_hash_map` we guarantee the
-  //   first match is inserted.
-  //
-  // void insert(std::initializer_list<init_type> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently within the initializer list, for
-  //   `node_hash_map` we guarantee the first match is inserted.
-  using Base::insert;
-
-  // node_hash_map::insert_or_assign()
-  //
-  // Inserts an element of the specified value into the `node_hash_map` provided
-  // that a value with the given key does not already exist, or replaces it with
-  // the element value if a key for that value already exists, returning an
-  // iterator pointing to the newly inserted element. If rehashing occurs due to
-  // the insertion, all iterators are invalidated. Overloads are listed
-  // below.
-  //
-  // std::pair<iterator, bool> insert_or_assign(const init_type& k, T&& obj):
-  // std::pair<iterator, bool> insert_or_assign(init_type&& k, T&& obj):
-  //
-  //   Inserts/Assigns (or moves) the element of the specified key into the
-  //   `node_hash_map`.
-  //
-  // iterator insert_or_assign(const_iterator hint,
-  //                           const init_type& k, T&& obj):
-  // iterator insert_or_assign(const_iterator hint, init_type&& k, T&& obj):
-  //
-  //   Inserts/Assigns (or moves) the element of the specified key into the
-  //   `node_hash_map` using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search.
-  using Base::insert_or_assign;
-
-  // node_hash_map::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `node_hash_map`, provided that no element with the given key
-  // already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately. Prefer `try_emplace()` unless your key is not
-  // copyable or moveable.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace;
-
-  // node_hash_map::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `node_hash_map`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search, and only inserts
-  // provided that no element with the given key already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately. Prefer `try_emplace()` unless your key is not
-  // copyable or moveable.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace_hint;
-
-  // node_hash_map::try_emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `node_hash_map`, provided that no element with the given key
-  // already exists. Unlike `emplace()`, if an element with the given key
-  // already exists, we guarantee that no element is constructed.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  // Overloads are listed below.
-  //
-  //   std::pair<iterator, bool> try_emplace(const key_type& k, Args&&... args):
-  //   std::pair<iterator, bool> try_emplace(key_type&& k, Args&&... args):
-  //
-  // Inserts (via copy or move) the element of the specified key into the
-  // `node_hash_map`.
-  //
-  //   iterator try_emplace(const_iterator hint,
-  //                        const init_type& k, Args&&... args):
-  //   iterator try_emplace(const_iterator hint, init_type&& k, Args&&... args):
-  //
-  // Inserts (via copy or move) the element of the specified key into the
-  // `node_hash_map` using the position of `hint` as a non-binding suggestion
-  // for where to begin the insertion search.
-  //
-  // All `try_emplace()` overloads make the same guarantees regarding rvalue
-  // arguments as `std::unordered_map::try_emplace()`, namely that these
-  // functions will not move from rvalue arguments if insertions do not happen.
-  using Base::try_emplace;
-
-  // node_hash_map::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the key,value pair of the element at the indicated position and
-  //   returns a node handle owning that extracted data.
-  //
-  // node_type extract(const key_type& x):
-  //
-  //   Extracts the key,value pair of the element with a key matching the passed
-  //   key value and returns a node handle owning that extracted data. If the
-  //   `node_hash_map` does not contain an element with a matching key, this
-  //   function returns an empty node handle.
-  //
-  // NOTE: when compiled in an earlier version of C++ than C++17,
-  // `node_type::key()` returns a const reference to the key instead of a
-  // mutable reference. We cannot safely return a mutable reference without
-  // std::launder (which is not available before C++17).
-  using Base::extract;
-
-  // node_hash_map::merge()
-  //
-  // Extracts elements from a given `source` node hash map into this
-  // `node_hash_map`. If the destination `node_hash_map` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // node_hash_map::swap(node_hash_map& other)
-  //
-  // Exchanges the contents of this `node_hash_map` with those of the `other`
-  // node hash map, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
-  //
-  // All iterators and references on the `node_hash_map` remain valid, excepting
-  // for the past-the-end iterator, which is invalidated.
-  //
-  // `swap()` requires that the node hash map's hashing and key equivalence
-  // functions be Swappable, and are exchaged using unqualified calls to
-  // non-member `swap()`. If the map's allocator has
-  // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value`
-  // set to `true`, the allocators are also exchanged using an unqualified call
-  // to non-member `swap()`; otherwise, the allocators are not swapped.
-  using Base::swap;
-
-  // node_hash_map::rehash(count)
-  //
-  // Rehashes the `node_hash_map`, setting the number of slots to be at least
-  // the passed value. If the new number of slots increases the load factor more
-  // than the current maximum load factor
-  // (`count` < `size()` / `max_load_factor()`), then the new number of slots
-  // will be at least `size()` / `max_load_factor()`.
-  //
-  // To force a rehash, pass rehash(0).
-  using Base::rehash;
-
-  // node_hash_map::reserve(count)
-  //
-  // Sets the number of slots in the `node_hash_map` to the number needed to
-  // accommodate at least `count` total elements without exceeding the current
-  // maximum load factor, and may rehash the container if needed.
-  using Base::reserve;
-
-  // node_hash_map::at()
-  //
-  // Returns a reference to the mapped value of the element with key equivalent
-  // to the passed key.
-  using Base::at;
-
-  // node_hash_map::contains()
-  //
-  // Determines whether an element with a key comparing equal to the given `key`
-  // exists within the `node_hash_map`, returning `true` if so or `false`
-  // otherwise.
-  using Base::contains;
-
-  // node_hash_map::count(const Key& key) const
-  //
-  // Returns the number of elements with a key comparing equal to the given
-  // `key` within the `node_hash_map`. note that this function will return
-  // either `1` or `0` since duplicate keys are not allowed within a
-  // `node_hash_map`.
-  using Base::count;
-
-  // node_hash_map::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `node_hash_map`.
-  using Base::equal_range;
-
-  // node_hash_map::find()
-  //
-  // Finds an element with the passed `key` within the `node_hash_map`.
-  using Base::find;
-
-  // node_hash_map::operator[]()
-  //
-  // Returns a reference to the value mapped to the passed key within the
-  // `node_hash_map`, performing an `insert()` if the key does not already
-  // exist. If an insertion occurs and results in a rehashing of the container,
-  // all iterators are invalidated. Otherwise iterators are not affected and
-  // references are not invalidated. Overloads are listed below.
-  //
-  // T& operator[](const Key& key):
-  //
-  //   Inserts an init_type object constructed in-place if the element with the
-  //   given key does not exist.
-  //
-  // T& operator[](Key&& key):
-  //
-  //   Inserts an init_type object constructed in-place provided that an element
-  //   with the given key does not exist.
-  using Base::operator[];
-
-  // node_hash_map::bucket_count()
-  //
-  // Returns the number of "buckets" within the `node_hash_map`.
-  using Base::bucket_count;
-
-  // node_hash_map::load_factor()
-  //
-  // Returns the current load factor of the `node_hash_map` (the average number
-  // of slots occupied with a value within the hash map).
-  using Base::load_factor;
-
-  // node_hash_map::max_load_factor()
-  //
-  // Manages the maximum load factor of the `node_hash_map`. Overloads are
-  // listed below.
-  //
-  // float node_hash_map::max_load_factor()
-  //
-  //   Returns the current maximum load factor of the `node_hash_map`.
-  //
-  // void node_hash_map::max_load_factor(float ml)
-  //
-  //   Sets the maximum load factor of the `node_hash_map` to the passed value.
-  //
-  //   NOTE: This overload is provided only for API compatibility with the STL;
-  //   `node_hash_map` will ignore any set load factor and manage its rehashing
-  //   internally as an implementation detail.
-  using Base::max_load_factor;
-
-  // node_hash_map::get_allocator()
-  //
-  // Returns the allocator function associated with this `node_hash_map`.
-  using Base::get_allocator;
-
-  // node_hash_map::hash_function()
-  //
-  // Returns the hashing function used to hash the keys within this
-  // `node_hash_map`.
-  using Base::hash_function;
-
-  // node_hash_map::key_eq()
-  //
-  // Returns the function used for comparing keys equality.
-  using Base::key_eq;
-};
-
-// erase_if(node_hash_map<>, Pred)
-//
-// Erases all elements that satisfy the predicate `pred` from the container `c`.
-template <typename K, typename V, typename H, typename E, typename A,
-          typename Predicate>
-void erase_if(node_hash_map<K, V, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
-}
-
-namespace container_internal {
-
-template <class Key, class Value>
-class NodeHashMapPolicy
-    : public absl::container_internal::node_hash_policy<
-          std::pair<const Key, Value>&, NodeHashMapPolicy<Key, Value>> {
-  using value_type = std::pair<const Key, Value>;
-
- public:
-  using key_type = Key;
-  using mapped_type = Value;
-  using init_type = std::pair</*non const*/ key_type, mapped_type>;
-
-  template <class Allocator, class... Args>
-  static value_type* new_element(Allocator* alloc, Args&&... args) {
-    using PairAlloc = typename absl::allocator_traits<
-        Allocator>::template rebind_alloc<value_type>;
-    PairAlloc pair_alloc(*alloc);
-    value_type* res =
-        absl::allocator_traits<PairAlloc>::allocate(pair_alloc, 1);
-    absl::allocator_traits<PairAlloc>::construct(pair_alloc, res,
-                                                 std::forward<Args>(args)...);
-    return res;
-  }
-
-  template <class Allocator>
-  static void delete_element(Allocator* alloc, value_type* pair) {
-    using PairAlloc = typename absl::allocator_traits<
-        Allocator>::template rebind_alloc<value_type>;
-    PairAlloc pair_alloc(*alloc);
-    absl::allocator_traits<PairAlloc>::destroy(pair_alloc, pair);
-    absl::allocator_traits<PairAlloc>::deallocate(pair_alloc, pair, 1);
-  }
-
-  template <class F, class... Args>
-  static decltype(absl::container_internal::DecomposePair(
-      std::declval<F>(), std::declval<Args>()...))
-  apply(F&& f, Args&&... args) {
-    return absl::container_internal::DecomposePair(std::forward<F>(f),
-                                                   std::forward<Args>(args)...);
-  }
-
-  static size_t element_space_used(const value_type*) {
-    return sizeof(value_type);
-  }
-
-  static Value& value(value_type* elem) { return elem->second; }
-  static const Value& value(const value_type* elem) { return elem->second; }
-};
-}  // namespace container_internal
-
-namespace container_algorithm_internal {
-
-// Specialization of trait in absl/algorithm/container.h
-template <class Key, class T, class Hash, class KeyEqual, class Allocator>
-struct IsUnorderedContainer<
-    absl::node_hash_map<Key, T, Hash, KeyEqual, Allocator>> : std::true_type {};
-
-}  // namespace container_algorithm_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_NODE_HASH_MAP_H_
diff --git a/third_party/abseil/absl/container/node_hash_map_test.cc b/third_party/abseil/absl/container/node_hash_map_test.cc
deleted file mode 100644
index 8f59a1e..0000000
--- a/third_party/abseil/absl/container/node_hash_map_test.cc
+++ /dev/null
@@ -1,275 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/node_hash_map.h"
-
-#include "absl/container/internal/tracked.h"
-#include "absl/container/internal/unordered_map_constructor_test.h"
-#include "absl/container/internal/unordered_map_lookup_test.h"
-#include "absl/container/internal/unordered_map_members_test.h"
-#include "absl/container/internal/unordered_map_modifiers_test.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-
-using ::testing::Field;
-using ::testing::IsEmpty;
-using ::testing::Pair;
-using ::testing::UnorderedElementsAre;
-
-using MapTypes = ::testing::Types<
-    absl::node_hash_map<int, int, StatefulTestingHash, StatefulTestingEqual,
-                        Alloc<std::pair<const int, int>>>,
-    absl::node_hash_map<std::string, std::string, StatefulTestingHash,
-                        StatefulTestingEqual,
-                        Alloc<std::pair<const std::string, std::string>>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashMap, ConstructorTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashMap, LookupTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashMap, MembersTest, MapTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashMap, ModifiersTest, MapTypes);
-
-using M = absl::node_hash_map<std::string, Tracked<int>>;
-
-TEST(NodeHashMap, Emplace) {
-  M m;
-  Tracked<int> t(53);
-  m.emplace("a", t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(1, t.num_copies());
-
-  m.emplace(std::string("a"), t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(1, t.num_copies());
-
-  std::string a("a");
-  m.emplace(a, t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(1, t.num_copies());
-
-  const std::string ca("a");
-  m.emplace(a, t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(1, t.num_copies());
-
-  m.emplace(std::make_pair("a", t));
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(2, t.num_copies());
-
-  m.emplace(std::make_pair(std::string("a"), t));
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(3, t.num_copies());
-
-  std::pair<std::string, Tracked<int>> p("a", t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(4, t.num_copies());
-  m.emplace(p);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(4, t.num_copies());
-
-  const std::pair<std::string, Tracked<int>> cp("a", t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(5, t.num_copies());
-  m.emplace(cp);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(5, t.num_copies());
-
-  std::pair<const std::string, Tracked<int>> pc("a", t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(6, t.num_copies());
-  m.emplace(pc);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(6, t.num_copies());
-
-  const std::pair<const std::string, Tracked<int>> cpc("a", t);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(7, t.num_copies());
-  m.emplace(cpc);
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(7, t.num_copies());
-
-  m.emplace(std::piecewise_construct, std::forward_as_tuple("a"),
-            std::forward_as_tuple(t));
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(7, t.num_copies());
-
-  m.emplace(std::piecewise_construct, std::forward_as_tuple(std::string("a")),
-            std::forward_as_tuple(t));
-  ASSERT_EQ(0, t.num_moves());
-  ASSERT_EQ(7, t.num_copies());
-}
-
-TEST(NodeHashMap, AssignRecursive) {
-  struct Tree {
-    // Verify that unordered_map<K, IncompleteType> can be instantiated.
-    absl::node_hash_map<int, Tree> children;
-  };
-  Tree root;
-  const Tree& child = root.children.emplace().first->second;
-  // Verify that `lhs = rhs` doesn't read rhs after clearing lhs.
-  root = child;
-}
-
-TEST(FlatHashMap, MoveOnlyKey) {
-  struct Key {
-    Key() = default;
-    Key(Key&&) = default;
-    Key& operator=(Key&&) = default;
-  };
-  struct Eq {
-    bool operator()(const Key&, const Key&) const { return true; }
-  };
-  struct Hash {
-    size_t operator()(const Key&) const { return 0; }
-  };
-  absl::node_hash_map<Key, int, Hash, Eq> m;
-  m[Key()];
-}
-
-struct NonMovableKey {
-  explicit NonMovableKey(int i) : i(i) {}
-  NonMovableKey(NonMovableKey&&) = delete;
-  int i;
-};
-struct NonMovableKeyHash {
-  using is_transparent = void;
-  size_t operator()(const NonMovableKey& k) const { return k.i; }
-  size_t operator()(int k) const { return k; }
-};
-struct NonMovableKeyEq {
-  using is_transparent = void;
-  bool operator()(const NonMovableKey& a, const NonMovableKey& b) const {
-    return a.i == b.i;
-  }
-  bool operator()(const NonMovableKey& a, int b) const { return a.i == b; }
-};
-
-TEST(NodeHashMap, MergeExtractInsert) {
-  absl::node_hash_map<NonMovableKey, int, NonMovableKeyHash, NonMovableKeyEq>
-      set1, set2;
-  set1.emplace(std::piecewise_construct, std::make_tuple(7),
-               std::make_tuple(-7));
-  set1.emplace(std::piecewise_construct, std::make_tuple(17),
-               std::make_tuple(-17));
-
-  set2.emplace(std::piecewise_construct, std::make_tuple(7),
-               std::make_tuple(-70));
-  set2.emplace(std::piecewise_construct, std::make_tuple(19),
-               std::make_tuple(-190));
-
-  auto Elem = [](int key, int value) {
-    return Pair(Field(&NonMovableKey::i, key), value);
-  };
-
-  EXPECT_THAT(set1, UnorderedElementsAre(Elem(7, -7), Elem(17, -17)));
-  EXPECT_THAT(set2, UnorderedElementsAre(Elem(7, -70), Elem(19, -190)));
-
-  // NonMovableKey is neither copyable nor movable. We should still be able to
-  // move nodes around.
-  static_assert(!std::is_move_constructible<NonMovableKey>::value, "");
-  set1.merge(set2);
-
-  EXPECT_THAT(set1,
-              UnorderedElementsAre(Elem(7, -7), Elem(17, -17), Elem(19, -190)));
-  EXPECT_THAT(set2, UnorderedElementsAre(Elem(7, -70)));
-
-  auto node = set1.extract(7);
-  EXPECT_TRUE(node);
-  EXPECT_EQ(node.key().i, 7);
-  EXPECT_EQ(node.mapped(), -7);
-  EXPECT_THAT(set1, UnorderedElementsAre(Elem(17, -17), Elem(19, -190)));
-
-  auto insert_result = set2.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_FALSE(insert_result.inserted);
-  EXPECT_TRUE(insert_result.node);
-  EXPECT_EQ(insert_result.node.key().i, 7);
-  EXPECT_EQ(insert_result.node.mapped(), -7);
-  EXPECT_THAT(*insert_result.position, Elem(7, -70));
-  EXPECT_THAT(set2, UnorderedElementsAre(Elem(7, -70)));
-
-  node = set1.extract(17);
-  EXPECT_TRUE(node);
-  EXPECT_EQ(node.key().i, 17);
-  EXPECT_EQ(node.mapped(), -17);
-  EXPECT_THAT(set1, UnorderedElementsAre(Elem(19, -190)));
-
-  node.mapped() = 23;
-
-  insert_result = set2.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_TRUE(insert_result.inserted);
-  EXPECT_FALSE(insert_result.node);
-  EXPECT_THAT(*insert_result.position, Elem(17, 23));
-  EXPECT_THAT(set2, UnorderedElementsAre(Elem(7, -70), Elem(17, 23)));
-}
-
-bool FirstIsEven(std::pair<const int, int> p) { return p.first % 2 == 0; }
-
-TEST(NodeHashMap, EraseIf) {
-  // Erase all elements.
-  {
-    node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return true; });
-    EXPECT_THAT(s, IsEmpty());
-  }
-  // Erase no elements.
-  {
-    node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, [](std::pair<const int, int>) { return false; });
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(2, 2), Pair(3, 3),
-                                        Pair(4, 4), Pair(5, 5)));
-  }
-  // Erase specific elements.
-  {
-    node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s,
-             [](std::pair<const int, int> kvp) { return kvp.first % 2 == 1; });
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(2, 2), Pair(4, 4)));
-  }
-  // Predicate is function reference.
-  {
-    node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, FirstIsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
-  }
-  // Predicate is function pointer.
-  {
-    node_hash_map<int, int> s = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}};
-    erase_if(s, &FirstIsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(Pair(1, 1), Pair(3, 3), Pair(5, 5)));
-  }
-}
-
-// This test requires std::launder for mutable key access in node handles.
-#if defined(__cpp_lib_launder) && __cpp_lib_launder >= 201606
-TEST(NodeHashMap, NodeHandleMutableKeyAccess) {
-  node_hash_map<std::string, std::string> map;
-
-  map["key1"] = "mapped";
-
-  auto nh = map.extract(map.begin());
-  nh.key().resize(3);
-  map.insert(std::move(nh));
-
-  EXPECT_THAT(map, testing::ElementsAre(Pair("key", "mapped")));
-}
-#endif
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/container/node_hash_set.h b/third_party/abseil/absl/container/node_hash_set.h
deleted file mode 100644
index 93b15f4..0000000
--- a/third_party/abseil/absl/container/node_hash_set.h
+++ /dev/null
@@ -1,493 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: node_hash_set.h
-// -----------------------------------------------------------------------------
-//
-// An `absl::node_hash_set<T>` is an unordered associative container designed to
-// be a more efficient replacement for `std::unordered_set`. Like
-// `unordered_set`, search, insertion, and deletion of set elements can be done
-// as an `O(1)` operation. However, `node_hash_set` (and other unordered
-// associative containers known as the collection of Abseil "Swiss tables")
-// contain other optimizations that result in both memory and computation
-// advantages.
-//
-// In most cases, your default choice for a hash table should be a map of type
-// `flat_hash_map` or a set of type `flat_hash_set`. However, if you need
-// pointer stability, a `node_hash_set` should be your preferred choice. As
-// well, if you are migrating your code from using `std::unordered_set`, a
-// `node_hash_set` should be an easy migration. Consider migrating to
-// `node_hash_set` and perhaps converting to a more efficient `flat_hash_set`
-// upon further review.
-
-#ifndef ABSL_CONTAINER_NODE_HASH_SET_H_
-#define ABSL_CONTAINER_NODE_HASH_SET_H_
-
-#include <type_traits>
-
-#include "absl/algorithm/container.h"
-#include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
-#include "absl/container/internal/node_hash_policy.h"
-#include "absl/container/internal/raw_hash_set.h"  // IWYU pragma: export
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-template <typename T>
-struct NodeHashSetPolicy;
-}  // namespace container_internal
-
-// -----------------------------------------------------------------------------
-// absl::node_hash_set
-// -----------------------------------------------------------------------------
-//
-// An `absl::node_hash_set<T>` is an unordered associative container which
-// has been optimized for both speed and memory footprint in most common use
-// cases. Its interface is similar to that of `std::unordered_set<T>` with the
-// following notable differences:
-//
-// * Supports heterogeneous lookup, through `find()`, `operator[]()` and
-//   `insert()`, provided that the set is provided a compatible heterogeneous
-//   hashing function and equality operator.
-// * Contains a `capacity()` member function indicating the number of element
-//   slots (open, deleted, and empty) within the hash set.
-// * Returns `void` from the `erase(iterator)` overload.
-//
-// By default, `node_hash_set` uses the `absl::Hash` hashing framework.
-// All fundamental and Abseil types that support the `absl::Hash` framework have
-// a compatible equality operator for comparing insertions into `node_hash_set`.
-// If your type is not yet supported by the `absl::Hash` framework, see
-// absl/hash/hash.h for information on extending Abseil hashing to user-defined
-// types.
-//
-// Example:
-//
-//   // Create a node hash set of three strings
-//   absl::node_hash_set<std::string> ducks =
-//     {"huey", "dewey", "louie"};
-//
-//  // Insert a new element into the node hash set
-//  ducks.insert("donald");
-//
-//  // Force a rehash of the node hash set
-//  ducks.rehash(0);
-//
-//  // See if "dewey" is present
-//  if (ducks.contains("dewey")) {
-//    std::cout << "We found dewey!" << std::endl;
-//  }
-template <class T, class Hash = absl::container_internal::hash_default_hash<T>,
-          class Eq = absl::container_internal::hash_default_eq<T>,
-          class Alloc = std::allocator<T>>
-class node_hash_set
-    : public absl::container_internal::raw_hash_set<
-          absl::container_internal::NodeHashSetPolicy<T>, Hash, Eq, Alloc> {
-  using Base = typename node_hash_set::raw_hash_set;
-
- public:
-  // Constructors and Assignment Operators
-  //
-  // A node_hash_set supports the same overload set as `std::unordered_set`
-  // for construction and assignment:
-  //
-  // *  Default constructor
-  //
-  //    // No allocation for the table's elements is made.
-  //    absl::node_hash_set<std::string> set1;
-  //
-  // * Initializer List constructor
-  //
-  //   absl::node_hash_set<std::string> set2 =
-  //       {{"huey"}, {"dewey"}, {"louie"}};
-  //
-  // * Copy constructor
-  //
-  //   absl::node_hash_set<std::string> set3(set2);
-  //
-  // * Copy assignment operator
-  //
-  //  // Hash functor and Comparator are copied as well
-  //  absl::node_hash_set<std::string> set4;
-  //  set4 = set3;
-  //
-  // * Move constructor
-  //
-  //   // Move is guaranteed efficient
-  //   absl::node_hash_set<std::string> set5(std::move(set4));
-  //
-  // * Move assignment operator
-  //
-  //   // May be efficient if allocators are compatible
-  //   absl::node_hash_set<std::string> set6;
-  //   set6 = std::move(set5);
-  //
-  // * Range constructor
-  //
-  //   std::vector<std::string> v = {"a", "b"};
-  //   absl::node_hash_set<std::string> set7(v.begin(), v.end());
-  node_hash_set() {}
-  using Base::Base;
-
-  // node_hash_set::begin()
-  //
-  // Returns an iterator to the beginning of the `node_hash_set`.
-  using Base::begin;
-
-  // node_hash_set::cbegin()
-  //
-  // Returns a const iterator to the beginning of the `node_hash_set`.
-  using Base::cbegin;
-
-  // node_hash_set::cend()
-  //
-  // Returns a const iterator to the end of the `node_hash_set`.
-  using Base::cend;
-
-  // node_hash_set::end()
-  //
-  // Returns an iterator to the end of the `node_hash_set`.
-  using Base::end;
-
-  // node_hash_set::capacity()
-  //
-  // Returns the number of element slots (assigned, deleted, and empty)
-  // available within the `node_hash_set`.
-  //
-  // NOTE: this member function is particular to `absl::node_hash_set` and is
-  // not provided in the `std::unordered_set` API.
-  using Base::capacity;
-
-  // node_hash_set::empty()
-  //
-  // Returns whether or not the `node_hash_set` is empty.
-  using Base::empty;
-
-  // node_hash_set::max_size()
-  //
-  // Returns the largest theoretical possible number of elements within a
-  // `node_hash_set` under current memory constraints. This value can be thought
-  // of the largest value of `std::distance(begin(), end())` for a
-  // `node_hash_set<T>`.
-  using Base::max_size;
-
-  // node_hash_set::size()
-  //
-  // Returns the number of elements currently within the `node_hash_set`.
-  using Base::size;
-
-  // node_hash_set::clear()
-  //
-  // Removes all elements from the `node_hash_set`. Invalidates any references,
-  // pointers, or iterators referring to contained elements.
-  //
-  // NOTE: this operation may shrink the underlying buffer. To avoid shrinking
-  // the underlying buffer call `erase(begin(), end())`.
-  using Base::clear;
-
-  // node_hash_set::erase()
-  //
-  // Erases elements within the `node_hash_set`. Erasing does not trigger a
-  // rehash. Overloads are listed below.
-  //
-  // void erase(const_iterator pos):
-  //
-  //   Erases the element at `position` of the `node_hash_set`, returning
-  //   `void`.
-  //
-  //   NOTE: this return behavior is different than that of STL containers in
-  //   general and `std::unordered_set` in particular.
-  //
-  // iterator erase(const_iterator first, const_iterator last):
-  //
-  //   Erases the elements in the open interval [`first`, `last`), returning an
-  //   iterator pointing to `last`.
-  //
-  // size_type erase(const key_type& key):
-  //
-  //   Erases the element with the matching key, if it exists, returning the
-  //   number of elements erased (0 or 1).
-  using Base::erase;
-
-  // node_hash_set::insert()
-  //
-  // Inserts an element of the specified value into the `node_hash_set`,
-  // returning an iterator pointing to the newly inserted element, provided that
-  // an element with the given key does not already exist. If rehashing occurs
-  // due to the insertion, all iterators are invalidated. Overloads are listed
-  // below.
-  //
-  // std::pair<iterator,bool> insert(const T& value):
-  //
-  //   Inserts a value into the `node_hash_set`. Returns a pair consisting of an
-  //   iterator to the inserted element (or to the element that prevented the
-  //   insertion) and a bool denoting whether the insertion took place.
-  //
-  // std::pair<iterator,bool> insert(T&& value):
-  //
-  //   Inserts a moveable value into the `node_hash_set`. Returns a pair
-  //   consisting of an iterator to the inserted element (or to the element that
-  //   prevented the insertion) and a bool denoting whether the insertion took
-  //   place.
-  //
-  // iterator insert(const_iterator hint, const T& value):
-  // iterator insert(const_iterator hint, T&& value):
-  //
-  //   Inserts a value, using the position of `hint` as a non-binding suggestion
-  //   for where to begin the insertion search. Returns an iterator to the
-  //   inserted element, or to the existing element that prevented the
-  //   insertion.
-  //
-  // void insert(InputIterator first, InputIterator last):
-  //
-  //   Inserts a range of values [`first`, `last`).
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently, for `node_hash_set` we guarantee the
-  //   first match is inserted.
-  //
-  // void insert(std::initializer_list<T> ilist):
-  //
-  //   Inserts the elements within the initializer list `ilist`.
-  //
-  //   NOTE: Although the STL does not specify which element may be inserted if
-  //   multiple keys compare equivalently within the initializer list, for
-  //   `node_hash_set` we guarantee the first match is inserted.
-  using Base::insert;
-
-  // node_hash_set::emplace()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `node_hash_set`, provided that no element with the given key
-  // already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace;
-
-  // node_hash_set::emplace_hint()
-  //
-  // Inserts an element of the specified value by constructing it in-place
-  // within the `node_hash_set`, using the position of `hint` as a non-binding
-  // suggestion for where to begin the insertion search, and only inserts
-  // provided that no element with the given key already exists.
-  //
-  // The element may be constructed even if there already is an element with the
-  // key in the container, in which case the newly constructed element will be
-  // destroyed immediately.
-  //
-  // If rehashing occurs due to the insertion, all iterators are invalidated.
-  using Base::emplace_hint;
-
-  // node_hash_set::extract()
-  //
-  // Extracts the indicated element, erasing it in the process, and returns it
-  // as a C++17-compatible node handle. Overloads are listed below.
-  //
-  // node_type extract(const_iterator position):
-  //
-  //   Extracts the element at the indicated position and returns a node handle
-  //   owning that extracted data.
-  //
-  // node_type extract(const key_type& x):
-  //
-  //   Extracts the element with the key matching the passed key value and
-  //   returns a node handle owning that extracted data. If the `node_hash_set`
-  //   does not contain an element with a matching key, this function returns an
-  // empty node handle.
-  using Base::extract;
-
-  // node_hash_set::merge()
-  //
-  // Extracts elements from a given `source` node hash set into this
-  // `node_hash_set`. If the destination `node_hash_set` already contains an
-  // element with an equivalent key, that element is not extracted.
-  using Base::merge;
-
-  // node_hash_set::swap(node_hash_set& other)
-  //
-  // Exchanges the contents of this `node_hash_set` with those of the `other`
-  // node hash set, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
-  //
-  // All iterators and references on the `node_hash_set` remain valid, excepting
-  // for the past-the-end iterator, which is invalidated.
-  //
-  // `swap()` requires that the node hash set's hashing and key equivalence
-  // functions be Swappable, and are exchaged using unqualified calls to
-  // non-member `swap()`. If the set's allocator has
-  // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value`
-  // set to `true`, the allocators are also exchanged using an unqualified call
-  // to non-member `swap()`; otherwise, the allocators are not swapped.
-  using Base::swap;
-
-  // node_hash_set::rehash(count)
-  //
-  // Rehashes the `node_hash_set`, setting the number of slots to be at least
-  // the passed value. If the new number of slots increases the load factor more
-  // than the current maximum load factor
-  // (`count` < `size()` / `max_load_factor()`), then the new number of slots
-  // will be at least `size()` / `max_load_factor()`.
-  //
-  // To force a rehash, pass rehash(0).
-  //
-  // NOTE: unlike behavior in `std::unordered_set`, references are also
-  // invalidated upon a `rehash()`.
-  using Base::rehash;
-
-  // node_hash_set::reserve(count)
-  //
-  // Sets the number of slots in the `node_hash_set` to the number needed to
-  // accommodate at least `count` total elements without exceeding the current
-  // maximum load factor, and may rehash the container if needed.
-  using Base::reserve;
-
-  // node_hash_set::contains()
-  //
-  // Determines whether an element comparing equal to the given `key` exists
-  // within the `node_hash_set`, returning `true` if so or `false` otherwise.
-  using Base::contains;
-
-  // node_hash_set::count(const Key& key) const
-  //
-  // Returns the number of elements comparing equal to the given `key` within
-  // the `node_hash_set`. note that this function will return either `1` or `0`
-  // since duplicate elements are not allowed within a `node_hash_set`.
-  using Base::count;
-
-  // node_hash_set::equal_range()
-  //
-  // Returns a closed range [first, last], defined by a `std::pair` of two
-  // iterators, containing all elements with the passed key in the
-  // `node_hash_set`.
-  using Base::equal_range;
-
-  // node_hash_set::find()
-  //
-  // Finds an element with the passed `key` within the `node_hash_set`.
-  using Base::find;
-
-  // node_hash_set::bucket_count()
-  //
-  // Returns the number of "buckets" within the `node_hash_set`. Note that
-  // because a node hash set contains all elements within its internal storage,
-  // this value simply equals the current capacity of the `node_hash_set`.
-  using Base::bucket_count;
-
-  // node_hash_set::load_factor()
-  //
-  // Returns the current load factor of the `node_hash_set` (the average number
-  // of slots occupied with a value within the hash set).
-  using Base::load_factor;
-
-  // node_hash_set::max_load_factor()
-  //
-  // Manages the maximum load factor of the `node_hash_set`. Overloads are
-  // listed below.
-  //
-  // float node_hash_set::max_load_factor()
-  //
-  //   Returns the current maximum load factor of the `node_hash_set`.
-  //
-  // void node_hash_set::max_load_factor(float ml)
-  //
-  //   Sets the maximum load factor of the `node_hash_set` to the passed value.
-  //
-  //   NOTE: This overload is provided only for API compatibility with the STL;
-  //   `node_hash_set` will ignore any set load factor and manage its rehashing
-  //   internally as an implementation detail.
-  using Base::max_load_factor;
-
-  // node_hash_set::get_allocator()
-  //
-  // Returns the allocator function associated with this `node_hash_set`.
-  using Base::get_allocator;
-
-  // node_hash_set::hash_function()
-  //
-  // Returns the hashing function used to hash the keys within this
-  // `node_hash_set`.
-  using Base::hash_function;
-
-  // node_hash_set::key_eq()
-  //
-  // Returns the function used for comparing keys equality.
-  using Base::key_eq;
-};
-
-// erase_if(node_hash_set<>, Pred)
-//
-// Erases all elements that satisfy the predicate `pred` from the container `c`.
-template <typename T, typename H, typename E, typename A, typename Predicate>
-void erase_if(node_hash_set<T, H, E, A>& c, Predicate pred) {
-  container_internal::EraseIf(pred, &c);
-}
-
-namespace container_internal {
-
-template <class T>
-struct NodeHashSetPolicy
-    : absl::container_internal::node_hash_policy<T&, NodeHashSetPolicy<T>> {
-  using key_type = T;
-  using init_type = T;
-  using constant_iterators = std::true_type;
-
-  template <class Allocator, class... Args>
-  static T* new_element(Allocator* alloc, Args&&... args) {
-    using ValueAlloc =
-        typename absl::allocator_traits<Allocator>::template rebind_alloc<T>;
-    ValueAlloc value_alloc(*alloc);
-    T* res = absl::allocator_traits<ValueAlloc>::allocate(value_alloc, 1);
-    absl::allocator_traits<ValueAlloc>::construct(value_alloc, res,
-                                                  std::forward<Args>(args)...);
-    return res;
-  }
-
-  template <class Allocator>
-  static void delete_element(Allocator* alloc, T* elem) {
-    using ValueAlloc =
-        typename absl::allocator_traits<Allocator>::template rebind_alloc<T>;
-    ValueAlloc value_alloc(*alloc);
-    absl::allocator_traits<ValueAlloc>::destroy(value_alloc, elem);
-    absl::allocator_traits<ValueAlloc>::deallocate(value_alloc, elem, 1);
-  }
-
-  template <class F, class... Args>
-  static decltype(absl::container_internal::DecomposeValue(
-      std::declval<F>(), std::declval<Args>()...))
-  apply(F&& f, Args&&... args) {
-    return absl::container_internal::DecomposeValue(
-        std::forward<F>(f), std::forward<Args>(args)...);
-  }
-
-  static size_t element_space_used(const T*) { return sizeof(T); }
-};
-}  // namespace container_internal
-
-namespace container_algorithm_internal {
-
-// Specialization of trait in absl/algorithm/container.h
-template <class Key, class Hash, class KeyEqual, class Allocator>
-struct IsUnorderedContainer<absl::node_hash_set<Key, Hash, KeyEqual, Allocator>>
-    : std::true_type {};
-
-}  // namespace container_algorithm_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_NODE_HASH_SET_H_
diff --git a/third_party/abseil/absl/container/node_hash_set_test.cc b/third_party/abseil/absl/container/node_hash_set_test.cc
deleted file mode 100644
index 7ddad20..0000000
--- a/third_party/abseil/absl/container/node_hash_set_test.cc
+++ /dev/null
@@ -1,143 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/container/node_hash_set.h"
-
-#include "absl/container/internal/unordered_set_constructor_test.h"
-#include "absl/container/internal/unordered_set_lookup_test.h"
-#include "absl/container/internal/unordered_set_members_test.h"
-#include "absl/container/internal/unordered_set_modifiers_test.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-namespace {
-using ::absl::container_internal::hash_internal::Enum;
-using ::absl::container_internal::hash_internal::EnumClass;
-using ::testing::IsEmpty;
-using ::testing::Pointee;
-using ::testing::UnorderedElementsAre;
-
-using SetTypes = ::testing::Types<
-    node_hash_set<int, StatefulTestingHash, StatefulTestingEqual, Alloc<int>>,
-    node_hash_set<std::string, StatefulTestingHash, StatefulTestingEqual,
-                  Alloc<std::string>>,
-    node_hash_set<Enum, StatefulTestingHash, StatefulTestingEqual, Alloc<Enum>>,
-    node_hash_set<EnumClass, StatefulTestingHash, StatefulTestingEqual,
-                  Alloc<EnumClass>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashSet, ConstructorTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashSet, LookupTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashSet, MembersTest, SetTypes);
-INSTANTIATE_TYPED_TEST_SUITE_P(NodeHashSet, ModifiersTest, SetTypes);
-
-TEST(NodeHashSet, MoveableNotCopyableCompiles) {
-  node_hash_set<std::unique_ptr<void*>> t;
-  node_hash_set<std::unique_ptr<void*>> u;
-  u = std::move(t);
-}
-
-TEST(NodeHashSet, MergeExtractInsert) {
-  struct Hash {
-    size_t operator()(const std::unique_ptr<int>& p) const { return *p; }
-  };
-  struct Eq {
-    bool operator()(const std::unique_ptr<int>& a,
-                    const std::unique_ptr<int>& b) const {
-      return *a == *b;
-    }
-  };
-  absl::node_hash_set<std::unique_ptr<int>, Hash, Eq> set1, set2;
-  set1.insert(absl::make_unique<int>(7));
-  set1.insert(absl::make_unique<int>(17));
-
-  set2.insert(absl::make_unique<int>(7));
-  set2.insert(absl::make_unique<int>(19));
-
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(7), Pointee(17)));
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7), Pointee(19)));
-
-  set1.merge(set2);
-
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(7), Pointee(17), Pointee(19)));
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7)));
-
-  auto node = set1.extract(absl::make_unique<int>(7));
-  EXPECT_TRUE(node);
-  EXPECT_THAT(node.value(), Pointee(7));
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(17), Pointee(19)));
-
-  auto insert_result = set2.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_FALSE(insert_result.inserted);
-  EXPECT_TRUE(insert_result.node);
-  EXPECT_THAT(insert_result.node.value(), Pointee(7));
-  EXPECT_EQ(**insert_result.position, 7);
-  EXPECT_NE(insert_result.position->get(), insert_result.node.value().get());
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7)));
-
-  node = set1.extract(absl::make_unique<int>(17));
-  EXPECT_TRUE(node);
-  EXPECT_THAT(node.value(), Pointee(17));
-  EXPECT_THAT(set1, UnorderedElementsAre(Pointee(19)));
-
-  node.value() = absl::make_unique<int>(23);
-
-  insert_result = set2.insert(std::move(node));
-  EXPECT_FALSE(node);
-  EXPECT_TRUE(insert_result.inserted);
-  EXPECT_FALSE(insert_result.node);
-  EXPECT_EQ(**insert_result.position, 23);
-  EXPECT_THAT(set2, UnorderedElementsAre(Pointee(7), Pointee(23)));
-}
-
-bool IsEven(int k) { return k % 2 == 0; }
-
-TEST(NodeHashSet, EraseIf) {
-  // Erase all elements.
-  {
-    node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return true; });
-    EXPECT_THAT(s, IsEmpty());
-  }
-  // Erase no elements.
-  {
-    node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int) { return false; });
-    EXPECT_THAT(s, UnorderedElementsAre(1, 2, 3, 4, 5));
-  }
-  // Erase specific elements.
-  {
-    node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, [](int k) { return k % 2 == 1; });
-    EXPECT_THAT(s, UnorderedElementsAre(2, 4));
-  }
-  // Predicate is function reference.
-  {
-    node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, IsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
-  }
-  // Predicate is function pointer.
-  {
-    node_hash_set<int> s = {1, 2, 3, 4, 5};
-    erase_if(s, &IsEven);
-    EXPECT_THAT(s, UnorderedElementsAre(1, 3, 5));
-  }
-}
-
-}  // namespace
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/copts/AbseilConfigureCopts.cmake b/third_party/abseil/absl/copts/AbseilConfigureCopts.cmake
deleted file mode 100644
index acd46d0..0000000
--- a/third_party/abseil/absl/copts/AbseilConfigureCopts.cmake
+++ /dev/null
@@ -1,67 +0,0 @@
-# See absl/copts/copts.py and absl/copts/generate_copts.py
-include(GENERATED_AbseilCopts)
-
-set(ABSL_LSAN_LINKOPTS "")
-set(ABSL_HAVE_LSAN OFF)
-set(ABSL_DEFAULT_LINKOPTS "")
-
-if (BUILD_SHARED_LIBS AND MSVC)
-  set(ABSL_BUILD_DLL TRUE)
-  set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
-else()
-  set(ABSL_BUILD_DLL FALSE)
-endif()
-
-if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "x86_64|amd64|AMD64")
-  if (MSVC)
-    set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}")
-  else()
-    set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_X64_FLAGS}")
-  endif()
-elseif("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm.*|aarch64")
-  if ("${CMAKE_SIZEOF_VOID_P}" STREQUAL "8")
-    set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_ARM64_FLAGS}")
-  elseif("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")
-    set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_ARM32_FLAGS}")
-  else()
-    message(WARNING "Value of CMAKE_SIZEOF_VOID_P (${CMAKE_SIZEOF_VOID_P}) is not supported.")
-  endif()
-else()
-  message(WARNING "Value of CMAKE_SYSTEM_PROCESSOR (${CMAKE_SYSTEM_PROCESSOR}) is unknown and cannot be used to set ABSL_RANDOM_RANDEN_COPTS")
-  set(ABSL_RANDOM_RANDEN_COPTS "")
-endif()
-
-
-if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-  set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}")
-  set(ABSL_TEST_COPTS "${ABSL_GCC_FLAGS};${ABSL_GCC_TEST_FLAGS}")
-elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-  # MATCHES so we get both Clang and AppleClang
-  if(MSVC)
-    # clang-cl is half MSVC, half LLVM
-    set(ABSL_DEFAULT_COPTS "${ABSL_CLANG_CL_FLAGS}")
-    set(ABSL_TEST_COPTS "${ABSL_CLANG_CL_FLAGS};${ABSL_CLANG_CL_TEST_FLAGS}")
-    set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
-  else()
-    set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}")
-    set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")
-    if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-      # AppleClang doesn't have lsan
-      # https://developer.apple.com/documentation/code_diagnostics
-      if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
-        set(ABSL_LSAN_LINKOPTS "-fsanitize=leak")
-        set(ABSL_HAVE_LSAN ON)
-      endif()
-    endif()
-  endif()
-elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
-  set(ABSL_DEFAULT_COPTS "${ABSL_MSVC_FLAGS}")
-  set(ABSL_TEST_COPTS "${ABSL_MSVC_FLAGS};${ABSL_MSVC_TEST_FLAGS}")
-  set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
-else()
-  message(WARNING "Unknown compiler: ${CMAKE_CXX_COMPILER}.  Building with no default flags")
-  set(ABSL_DEFAULT_COPTS "")
-  set(ABSL_TEST_COPTS "")
-endif()
-
-set(ABSL_CXX_STANDARD "${CMAKE_CXX_STANDARD}")
diff --git a/third_party/abseil/absl/copts/GENERATED_AbseilCopts.cmake b/third_party/abseil/absl/copts/GENERATED_AbseilCopts.cmake
deleted file mode 100644
index 51742c9..0000000
--- a/third_party/abseil/absl/copts/GENERATED_AbseilCopts.cmake
+++ /dev/null
@@ -1,162 +0,0 @@
-# GENERATED! DO NOT MANUALLY EDIT THIS FILE.
-#
-# (1) Edit absl/copts/copts.py.
-# (2) Run `python <path_to_absl>/copts/generate_copts.py`.
-
-list(APPEND ABSL_CLANG_CL_FLAGS
-    "/W3"
-    "/DNOMINMAX"
-    "/DWIN32_LEAN_AND_MEAN"
-    "/D_CRT_SECURE_NO_WARNINGS"
-    "/D_SCL_SECURE_NO_WARNINGS"
-    "/D_ENABLE_EXTENDED_ALIGNED_STORAGE"
-)
-
-list(APPEND ABSL_CLANG_CL_TEST_FLAGS
-    "-Wno-c99-extensions"
-    "-Wno-deprecated-declarations"
-    "-Wno-missing-noreturn"
-    "-Wno-missing-prototypes"
-    "-Wno-missing-variable-declarations"
-    "-Wno-null-conversion"
-    "-Wno-shadow"
-    "-Wno-shift-sign-overflow"
-    "-Wno-sign-compare"
-    "-Wno-unused-function"
-    "-Wno-unused-member-function"
-    "-Wno-unused-parameter"
-    "-Wno-unused-private-field"
-    "-Wno-unused-template"
-    "-Wno-used-but-marked-unused"
-    "-Wno-zero-as-null-pointer-constant"
-    "-Wno-gnu-zero-variadic-macro-arguments"
-)
-
-list(APPEND ABSL_GCC_FLAGS
-    "-Wall"
-    "-Wextra"
-    "-Wcast-qual"
-    "-Wconversion-null"
-    "-Wformat-security"
-    "-Wmissing-declarations"
-    "-Woverlength-strings"
-    "-Wpointer-arith"
-    "-Wundef"
-    "-Wunused-local-typedefs"
-    "-Wunused-result"
-    "-Wvarargs"
-    "-Wvla"
-    "-Wwrite-strings"
-    "-DNOMINMAX"
-)
-
-list(APPEND ABSL_GCC_TEST_FLAGS
-    "-Wno-conversion-null"
-    "-Wno-deprecated-declarations"
-    "-Wno-missing-declarations"
-    "-Wno-sign-compare"
-    "-Wno-unused-function"
-    "-Wno-unused-parameter"
-    "-Wno-unused-private-field"
-)
-
-list(APPEND ABSL_LLVM_FLAGS
-    "-Wall"
-    "-Wextra"
-    "-Wcast-qual"
-    "-Wconversion"
-    "-Wfloat-overflow-conversion"
-    "-Wfloat-zero-conversion"
-    "-Wfor-loop-analysis"
-    "-Wformat-security"
-    "-Wgnu-redeclared-enum"
-    "-Winfinite-recursion"
-    "-Wliteral-conversion"
-    "-Wmissing-declarations"
-    "-Woverlength-strings"
-    "-Wpointer-arith"
-    "-Wself-assign"
-    "-Wshadow"
-    "-Wstring-conversion"
-    "-Wtautological-overlap-compare"
-    "-Wundef"
-    "-Wuninitialized"
-    "-Wunreachable-code"
-    "-Wunused-comparison"
-    "-Wunused-local-typedefs"
-    "-Wunused-result"
-    "-Wvla"
-    "-Wwrite-strings"
-    "-Wno-float-conversion"
-    "-Wno-implicit-float-conversion"
-    "-Wno-implicit-int-float-conversion"
-    "-Wno-implicit-int-conversion"
-    "-Wno-shorten-64-to-32"
-    "-Wno-sign-conversion"
-    "-DNOMINMAX"
-)
-
-list(APPEND ABSL_LLVM_TEST_FLAGS
-    "-Wno-c99-extensions"
-    "-Wno-deprecated-declarations"
-    "-Wno-missing-noreturn"
-    "-Wno-missing-prototypes"
-    "-Wno-missing-variable-declarations"
-    "-Wno-null-conversion"
-    "-Wno-shadow"
-    "-Wno-shift-sign-overflow"
-    "-Wno-sign-compare"
-    "-Wno-unused-function"
-    "-Wno-unused-member-function"
-    "-Wno-unused-parameter"
-    "-Wno-unused-private-field"
-    "-Wno-unused-template"
-    "-Wno-used-but-marked-unused"
-    "-Wno-zero-as-null-pointer-constant"
-    "-Wno-gnu-zero-variadic-macro-arguments"
-)
-
-list(APPEND ABSL_MSVC_FLAGS
-    "/W3"
-    "/DNOMINMAX"
-    "/DWIN32_LEAN_AND_MEAN"
-    "/D_CRT_SECURE_NO_WARNINGS"
-    "/D_SCL_SECURE_NO_WARNINGS"
-    "/D_ENABLE_EXTENDED_ALIGNED_STORAGE"
-    "/bigobj"
-    "/wd4005"
-    "/wd4068"
-    "/wd4180"
-    "/wd4244"
-    "/wd4267"
-    "/wd4503"
-    "/wd4800"
-)
-
-list(APPEND ABSL_MSVC_LINKOPTS
-    "-ignore:4221"
-)
-
-list(APPEND ABSL_MSVC_TEST_FLAGS
-    "/wd4018"
-    "/wd4101"
-    "/wd4503"
-    "/wd4996"
-    "/DNOMINMAX"
-)
-
-list(APPEND ABSL_RANDOM_HWAES_ARM32_FLAGS
-    "-mfpu=neon"
-)
-
-list(APPEND ABSL_RANDOM_HWAES_ARM64_FLAGS
-    "-march=armv8-a+crypto"
-)
-
-list(APPEND ABSL_RANDOM_HWAES_MSVC_X64_FLAGS
-)
-
-list(APPEND ABSL_RANDOM_HWAES_X64_FLAGS
-    "-maes"
-    "-msse4.1"
-)
diff --git a/third_party/abseil/absl/copts/GENERATED_copts.bzl b/third_party/abseil/absl/copts/GENERATED_copts.bzl
deleted file mode 100644
index b1eb874..0000000
--- a/third_party/abseil/absl/copts/GENERATED_copts.bzl
+++ /dev/null
@@ -1,164 +0,0 @@
-"""GENERATED! DO NOT MANUALLY EDIT THIS FILE.
-
-(1) Edit absl/copts/copts.py.
-(2) Run `python <path_to_absl>/copts/generate_copts.py`.
-"""
-
-ABSL_CLANG_CL_FLAGS = [
-    "/W3",
-    "/DNOMINMAX",
-    "/DWIN32_LEAN_AND_MEAN",
-    "/D_CRT_SECURE_NO_WARNINGS",
-    "/D_SCL_SECURE_NO_WARNINGS",
-    "/D_ENABLE_EXTENDED_ALIGNED_STORAGE",
-]
-
-ABSL_CLANG_CL_TEST_FLAGS = [
-    "-Wno-c99-extensions",
-    "-Wno-deprecated-declarations",
-    "-Wno-missing-noreturn",
-    "-Wno-missing-prototypes",
-    "-Wno-missing-variable-declarations",
-    "-Wno-null-conversion",
-    "-Wno-shadow",
-    "-Wno-shift-sign-overflow",
-    "-Wno-sign-compare",
-    "-Wno-unused-function",
-    "-Wno-unused-member-function",
-    "-Wno-unused-parameter",
-    "-Wno-unused-private-field",
-    "-Wno-unused-template",
-    "-Wno-used-but-marked-unused",
-    "-Wno-zero-as-null-pointer-constant",
-    "-Wno-gnu-zero-variadic-macro-arguments",
-]
-
-ABSL_GCC_FLAGS = [
-    "-Wall",
-    "-Wextra",
-    "-Wcast-qual",
-    "-Wconversion-null",
-    "-Wformat-security",
-    "-Wmissing-declarations",
-    "-Woverlength-strings",
-    "-Wpointer-arith",
-    "-Wundef",
-    "-Wunused-local-typedefs",
-    "-Wunused-result",
-    "-Wvarargs",
-    "-Wvla",
-    "-Wwrite-strings",
-    "-DNOMINMAX",
-]
-
-ABSL_GCC_TEST_FLAGS = [
-    "-Wno-conversion-null",
-    "-Wno-deprecated-declarations",
-    "-Wno-missing-declarations",
-    "-Wno-sign-compare",
-    "-Wno-unused-function",
-    "-Wno-unused-parameter",
-    "-Wno-unused-private-field",
-]
-
-ABSL_LLVM_FLAGS = [
-    "-Wall",
-    "-Wextra",
-    "-Wcast-qual",
-    "-Wno-conversion",
-    "-Wfloat-overflow-conversion",
-    "-Wfloat-zero-conversion",
-    "-Wfor-loop-analysis",
-    "-Wformat-security",
-    "-Wgnu-redeclared-enum",
-    "-Winfinite-recursion",
-    "-Wliteral-conversion",
-    "-Wmissing-declarations",
-    "-Woverlength-strings",
-    "-Wpointer-arith",
-    "-Wself-assign",
-    "-Wshadow",
-    "-Wstring-conversion",
-    "-Wtautological-overlap-compare",
-    "-Wundef",
-    "-Wuninitialized",
-    "-Wunreachable-code",
-    "-Wunused-comparison",
-    "-Wunused-local-typedefs",
-    "-Wunused-result",
-    "-Wvla",
-    "-Wwrite-strings",
-    "-Wno-float-conversion",
-    "-Wno-implicit-float-conversion",
-    "-Wno-implicit-int-float-conversion",
-    "-Wno-implicit-int-conversion",
-    "-Wno-shorten-64-to-32",
-    "-Wno-sign-conversion",
-    "-DNOMINMAX",
-    "-Wno-unknown-warning-option",
-]
-
-ABSL_LLVM_TEST_FLAGS = [
-    "-Wno-c99-extensions",
-    "-Wno-deprecated-declarations",
-    "-Wno-missing-noreturn",
-    "-Wno-missing-prototypes",
-    "-Wno-missing-variable-declarations",
-    "-Wno-null-conversion",
-    "-Wno-shadow",
-    "-Wno-shift-sign-overflow",
-    "-Wno-sign-compare",
-    "-Wno-unused-function",
-    "-Wno-unused-member-function",
-    "-Wno-unused-parameter",
-    "-Wno-unused-private-field",
-    "-Wno-unused-template",
-    "-Wno-used-but-marked-unused",
-    "-Wno-zero-as-null-pointer-constant",
-    "-Wno-gnu-zero-variadic-macro-arguments",
-]
-
-ABSL_MSVC_FLAGS = [
-    "/W3",
-    "/DNOMINMAX",
-    "/DWIN32_LEAN_AND_MEAN",
-    "/D_CRT_SECURE_NO_WARNINGS",
-    "/D_SCL_SECURE_NO_WARNINGS",
-    "/D_ENABLE_EXTENDED_ALIGNED_STORAGE",
-    "/bigobj",
-    "/wd4005",
-    "/wd4068",
-    "/wd4180",
-    "/wd4244",
-    "/wd4267",
-    "/wd4503",
-    "/wd4800",
-]
-
-ABSL_MSVC_LINKOPTS = [
-    "-ignore:4221",
-]
-
-ABSL_MSVC_TEST_FLAGS = [
-    "/wd4018",
-    "/wd4101",
-    "/wd4503",
-    "/wd4996",
-    "/DNOMINMAX",
-]
-
-ABSL_RANDOM_HWAES_ARM32_FLAGS = [
-    "-mfpu=neon",
-]
-
-ABSL_RANDOM_HWAES_ARM64_FLAGS = [
-    "-march=armv8-a+crypto",
-]
-
-ABSL_RANDOM_HWAES_MSVC_X64_FLAGS = [
-]
-
-ABSL_RANDOM_HWAES_X64_FLAGS = [
-    "-maes",
-    "-msse4.1",
-]
diff --git a/third_party/abseil/absl/copts/configure_copts.bzl b/third_party/abseil/absl/copts/configure_copts.bzl
deleted file mode 100644
index 46dc156..0000000
--- a/third_party/abseil/absl/copts/configure_copts.bzl
+++ /dev/null
@@ -1,80 +0,0 @@
-"""absl specific copts.
-
-This file simply selects the correct options from the generated files.  To
-change Abseil copts, edit absl/copts/copts.py
-"""
-
-load(
-    "//absl:copts/GENERATED_copts.bzl",
-    "ABSL_CLANG_CL_FLAGS",
-    "ABSL_CLANG_CL_TEST_FLAGS",
-    "ABSL_GCC_FLAGS",
-    "ABSL_GCC_TEST_FLAGS",
-    "ABSL_LLVM_FLAGS",
-    "ABSL_LLVM_TEST_FLAGS",
-    "ABSL_MSVC_FLAGS",
-    "ABSL_MSVC_LINKOPTS",
-    "ABSL_MSVC_TEST_FLAGS",
-    "ABSL_RANDOM_HWAES_ARM32_FLAGS",
-    "ABSL_RANDOM_HWAES_ARM64_FLAGS",
-    "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS",
-    "ABSL_RANDOM_HWAES_X64_FLAGS",
-)
-
-ABSL_DEFAULT_COPTS = select({
-    "//absl:windows": ABSL_MSVC_FLAGS,
-    "//absl:clang_compiler": ABSL_LLVM_FLAGS,
-    "//conditions:default": ABSL_GCC_FLAGS,
-})
-
-ABSL_TEST_COPTS = ABSL_DEFAULT_COPTS + select({
-    "//absl:windows": ABSL_MSVC_TEST_FLAGS,
-    "//absl:clang_compiler": ABSL_LLVM_TEST_FLAGS,
-    "//conditions:default": ABSL_GCC_TEST_FLAGS,
-})
-
-ABSL_DEFAULT_LINKOPTS = select({
-    "//absl:windows": ABSL_MSVC_LINKOPTS,
-    "//conditions:default": [],
-})
-
-# ABSL_RANDOM_RANDEN_COPTS blaze copts flags which are required by each
-# environment to build an accelerated RandenHwAes library.
-ABSL_RANDOM_RANDEN_COPTS = select({
-    # APPLE
-    ":cpu_darwin_x86_64": ABSL_RANDOM_HWAES_X64_FLAGS,
-    ":cpu_darwin": ABSL_RANDOM_HWAES_X64_FLAGS,
-    ":cpu_x64_windows_msvc": ABSL_RANDOM_HWAES_MSVC_X64_FLAGS,
-    ":cpu_x64_windows": ABSL_RANDOM_HWAES_MSVC_X64_FLAGS,
-    ":cpu_k8": ABSL_RANDOM_HWAES_X64_FLAGS,
-    ":cpu_ppc": ["-mcrypto"],
-
-    # Supported by default or unsupported.
-    "//conditions:default": [],
-})
-
-# absl_random_randen_copts_init:
-#  Initialize the config targets based on cpu, os, etc. used to select
-#  the required values for ABSL_RANDOM_RANDEN_COPTS
-def absl_random_randen_copts_init():
-    """Initialize the config_settings used by ABSL_RANDOM_RANDEN_COPTS."""
-
-    # CPU configs.
-    # These configs have consistent flags to enable HWAES intsructions.
-    cpu_configs = [
-        "ppc",
-        #"k8",
-        "darwin_x86_64",
-        "darwin",
-        "x64_windows_msvc",
-        "x64_windows",
-    ]
-    for cpu in cpu_configs:
-        native.config_setting(
-            name = "cpu_%s" % cpu,
-            values = {"cpu": cpu},
-        )
-    native.config_setting(
-        name = "cpu_k8",
-        constraint_values = ["@platforms//cpu:x86_64"],
-    )
diff --git a/third_party/abseil/absl/copts/copts.py b/third_party/abseil/absl/copts/copts.py
deleted file mode 100644
index cf52981..0000000
--- a/third_party/abseil/absl/copts/copts.py
+++ /dev/null
@@ -1,162 +0,0 @@
-"""Abseil compiler options.
-
-This is the source of truth for Abseil compiler options.  To modify Abseil
-compilation options:
-
-  (1) Edit the appropriate list in this file based on the platform the flag is
-      needed on.
-  (2) Run `<path_to_absl>/copts/generate_copts.py`.
-
-The generated copts are consumed by configure_copts.bzl and
-AbseilConfigureCopts.cmake.
-"""
-
-# /Wall with msvc includes unhelpful warnings such as C4711, C4710, ...
-MSVC_BIG_WARNING_FLAGS = [
-    "/W3",
-]
-
-LLVM_TEST_DISABLE_WARNINGS_FLAGS = [
-    "-Wno-c99-extensions",
-    "-Wno-deprecated-declarations",
-    "-Wno-missing-noreturn",
-    "-Wno-missing-prototypes",
-    "-Wno-missing-variable-declarations",
-    "-Wno-null-conversion",
-    "-Wno-shadow",
-    "-Wno-shift-sign-overflow",
-    "-Wno-sign-compare",
-    "-Wno-unused-function",
-    "-Wno-unused-member-function",
-    "-Wno-unused-parameter",
-    "-Wno-unused-private-field",
-    "-Wno-unused-template",
-    "-Wno-used-but-marked-unused",
-    "-Wno-zero-as-null-pointer-constant",
-    # gtest depends on this GNU extension being offered.
-    "-Wno-gnu-zero-variadic-macro-arguments",
-]
-
-MSVC_DEFINES = [
-    "/DNOMINMAX",  # Don't define min and max macros (windows.h)
-    # Don't bloat namespace with incompatible winsock versions.
-    "/DWIN32_LEAN_AND_MEAN",
-    # Don't warn about usage of insecure C functions.
-    "/D_CRT_SECURE_NO_WARNINGS",
-    "/D_SCL_SECURE_NO_WARNINGS",
-    # Introduced in VS 2017 15.8, allow overaligned types in aligned_storage
-    "/D_ENABLE_EXTENDED_ALIGNED_STORAGE",
-]
-
-COPT_VARS = {
-    "ABSL_GCC_FLAGS": [
-        "-Wall",
-        "-Wextra",
-        "-Wcast-qual",
-        "-Wconversion-null",
-        "-Wformat-security",
-        "-Wmissing-declarations",
-        "-Woverlength-strings",
-        "-Wpointer-arith",
-        "-Wundef",
-        "-Wunused-local-typedefs",
-        "-Wunused-result",
-        "-Wvarargs",
-        "-Wvla",  # variable-length array
-        "-Wwrite-strings",
-        # Don't define min and max macros (Build on Windows using gcc)
-        "-DNOMINMAX",
-    ],
-    "ABSL_GCC_TEST_FLAGS": [
-        "-Wno-conversion-null",
-        "-Wno-deprecated-declarations",
-        "-Wno-missing-declarations",
-        "-Wno-sign-compare",
-        "-Wno-unused-function",
-        "-Wno-unused-parameter",
-        "-Wno-unused-private-field",
-    ],
-    "ABSL_LLVM_FLAGS": [
-        "-Wall",
-        "-Wextra",
-        "-Wcast-qual",
-        "-Wconversion",
-        "-Wfloat-overflow-conversion",
-        "-Wfloat-zero-conversion",
-        "-Wfor-loop-analysis",
-        "-Wformat-security",
-        "-Wgnu-redeclared-enum",
-        "-Winfinite-recursion",
-        "-Wliteral-conversion",
-        "-Wmissing-declarations",
-        "-Woverlength-strings",
-        "-Wpointer-arith",
-        "-Wself-assign",
-        "-Wshadow",
-        "-Wstring-conversion",
-        "-Wtautological-overlap-compare",
-        "-Wundef",
-        "-Wuninitialized",
-        "-Wunreachable-code",
-        "-Wunused-comparison",
-        "-Wunused-local-typedefs",
-        "-Wunused-result",
-        "-Wvla",
-        "-Wwrite-strings",
-        # Warnings that are enabled by group warning flags like -Wall that we
-        # explicitly disable.
-        "-Wno-float-conversion",
-        "-Wno-implicit-float-conversion",
-        "-Wno-implicit-int-float-conversion",
-        "-Wno-implicit-int-conversion",
-        "-Wno-shorten-64-to-32",
-        "-Wno-sign-conversion",
-        # Don't define min and max macros (Build on Windows using clang)
-        "-DNOMINMAX",
-    ],
-    "ABSL_LLVM_TEST_FLAGS":
-        LLVM_TEST_DISABLE_WARNINGS_FLAGS,
-    "ABSL_CLANG_CL_FLAGS":
-        (MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES),
-    "ABSL_CLANG_CL_TEST_FLAGS":
-        LLVM_TEST_DISABLE_WARNINGS_FLAGS,
-    "ABSL_MSVC_FLAGS":
-        MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + [
-            # Increase the number of sections available in object files
-            "/bigobj",
-            "/wd4005",  # macro-redefinition
-            "/wd4068",  # unknown pragma
-            # qualifier applied to function type has no meaning; ignored
-            "/wd4180",
-            # conversion from 'type1' to 'type2', possible loss of data
-            "/wd4244",
-            # conversion from 'size_t' to 'type', possible loss of data
-            "/wd4267",
-            # The decorated name was longer than the compiler limit
-            "/wd4503",
-            # forcing value to bool 'true' or 'false' (performance warning)
-            "/wd4800",
-        ],
-    "ABSL_MSVC_TEST_FLAGS": [
-        "/wd4018",  # signed/unsigned mismatch
-        "/wd4101",  # unreferenced local variable
-        "/wd4503",  # decorated name length exceeded, name was truncated
-        "/wd4996",  # use of deprecated symbol
-        "/DNOMINMAX",  # disable the min() and max() macros from <windows.h>
-    ],
-    "ABSL_MSVC_LINKOPTS": [
-        # Object file doesn't export any previously undefined symbols
-        "-ignore:4221",
-    ],
-    # "HWAES" is an abbreviation for "hardware AES" (AES - Advanced Encryption
-    # Standard). These flags are used for detecting whether or not the target
-    # architecture has hardware support for AES instructions which can be used
-    # to improve performance of some random bit generators.
-    "ABSL_RANDOM_HWAES_ARM64_FLAGS": ["-march=armv8-a+crypto"],
-    "ABSL_RANDOM_HWAES_ARM32_FLAGS": ["-mfpu=neon"],
-    "ABSL_RANDOM_HWAES_X64_FLAGS": [
-        "-maes",
-        "-msse4.1",
-    ],
-    "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [],
-}
diff --git a/third_party/abseil/absl/copts/generate_copts.py b/third_party/abseil/absl/copts/generate_copts.py
deleted file mode 100755
index 0e5dc9f..0000000
--- a/third_party/abseil/absl/copts/generate_copts.py
+++ /dev/null
@@ -1,109 +0,0 @@
-#!/usr/bin/python
-"""Generate Abseil compile compile option configs.
-
-Usage: <path_to_absl>/copts/generate_copts.py
-
-The configs are generated from copts.py.
-"""
-
-from os import path
-import sys
-from copts import COPT_VARS
-
-
-# Helper functions
-def file_header_lines():
-  return [
-      "GENERATED! DO NOT MANUALLY EDIT THIS FILE.", "",
-      "(1) Edit absl/copts/copts.py.",
-      "(2) Run `python <path_to_absl>/copts/generate_copts.py`."
-  ]
-
-
-def flatten(*lists):
-  return [item for sublist in lists for item in sublist]
-
-
-def relative_filename(filename):
-  return path.join(path.dirname(__file__), filename)
-
-
-# Style classes.  These contain all the syntactic styling needed to generate a
-# copt file for different build tools.
-class CMakeStyle(object):
-  """Style object for CMake copts file."""
-
-  def separator(self):
-    return ""
-
-  def list_introducer(self, name):
-    return "list(APPEND " + name
-
-  def list_closer(self):
-    return ")\n"
-
-  def docstring(self):
-    return "\n".join((("# " + line).strip() for line in file_header_lines()))
-
-  def filename(self):
-    return "GENERATED_AbseilCopts.cmake"
-
-
-class StarlarkStyle(object):
-  """Style object for Starlark copts file."""
-
-  def separator(self):
-    return ","
-
-  def list_introducer(self, name):
-    return name + " = ["
-
-  def list_closer(self):
-    return "]\n"
-
-  def docstring(self):
-    docstring_quotes = "\"\"\""
-    return docstring_quotes + "\n".join(
-        flatten(file_header_lines(), [docstring_quotes]))
-
-  def filename(self):
-    return "GENERATED_copts.bzl"
-
-
-def copt_list(name, arg_list, style):
-  """Copt file generation."""
-
-  make_line = lambda s: "    \"" + s + "\"" + style.separator()
-  external_str_list = [make_line(s) for s in arg_list]
-
-  return "\n".join(
-      flatten(
-          [style.list_introducer(name)],
-          external_str_list,
-          [style.list_closer()]))
-
-
-def generate_copt_file(style):
-  """Creates a generated copt file using the given style object.
-
-  Args:
-    style: either StarlarkStyle() or CMakeStyle()
-  """
-  with open(relative_filename(style.filename()), "w") as f:
-    f.write(style.docstring())
-    f.write("\n")
-    for var_name, arg_list in sorted(COPT_VARS.items()):
-      f.write("\n")
-      f.write(copt_list(var_name, arg_list, style))
-
-
-def main(argv):
-  if len(argv) > 1:
-    raise RuntimeError("generate_copts needs no command line args")
-
-  generate_copt_file(StarlarkStyle())
-  generate_copt_file(CMakeStyle())
-
-
-if __name__ == "__main__":
-  main(sys.argv)
diff --git a/third_party/abseil/absl/debugging/BUILD.bazel b/third_party/abseil/absl/debugging/BUILD.bazel
deleted file mode 100644
index cd6e454..0000000
--- a/third_party/abseil/absl/debugging/BUILD.bazel
+++ /dev/null
@@ -1,347 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(
-    default_visibility = ["//visibility:public"],
-)
-
-licenses(["notice"])
-
-cc_library(
-    name = "stacktrace",
-    srcs = [
-        "internal/stacktrace_aarch64-inl.inc",
-        "internal/stacktrace_arm-inl.inc",
-        "internal/stacktrace_config.h",
-        "internal/stacktrace_generic-inl.inc",
-        "internal/stacktrace_powerpc-inl.inc",
-        "internal/stacktrace_unimplemented-inl.inc",
-        "internal/stacktrace_win32-inl.inc",
-        "internal/stacktrace_x86-inl.inc",
-        "stacktrace.cc",
-    ],
-    hdrs = ["stacktrace.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":debugging_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_library(
-    name = "symbolize",
-    srcs = [
-        "symbolize.cc",
-        "symbolize_darwin.inc",
-        "symbolize_elf.inc",
-        "symbolize_unimplemented.inc",
-        "symbolize_win32.inc",
-    ],
-    hdrs = [
-        "internal/symbolize.h",
-        "symbolize.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS + select({
-        "//absl:windows": ["-DEFAULTLIB:dbghelp.lib"],
-        "//conditions:default": [],
-    }),
-    deps = [
-        ":debugging_internal",
-        ":demangle_internal",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:dynamic_annotations",
-        "//absl/base:malloc_internal",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-    ],
-)
-
-cc_test(
-    name = "symbolize_test",
-    srcs = ["symbolize_test.cc"],
-    copts = ABSL_TEST_COPTS + select({
-        "//absl:windows": ["/Z7"],
-        "//conditions:default": [],
-    }),
-    linkopts = ABSL_DEFAULT_LINKOPTS + select({
-        "//absl:windows": ["/DEBUG"],
-        "//conditions:default": [],
-    }),
-    deps = [
-        ":stack_consumption",
-        ":symbolize",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "examine_stack",
-    srcs = [
-        "internal/examine_stack.cc",
-    ],
-    hdrs = [
-        "internal/examine_stack.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":stacktrace",
-        ":symbolize",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "failure_signal_handler",
-    srcs = ["failure_signal_handler.cc"],
-    hdrs = ["failure_signal_handler.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":examine_stack",
-        ":stacktrace",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:errno_saver",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_test(
-    name = "failure_signal_handler_test",
-    srcs = ["failure_signal_handler_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = select({
-        "//absl:windows": [],
-        "//absl:wasm": [],
-        "//conditions:default": ["-pthread"],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":failure_signal_handler",
-        ":stacktrace",
-        ":symbolize",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "debugging_internal",
-    srcs = [
-        "internal/address_is_readable.cc",
-        "internal/elf_mem_image.cc",
-        "internal/vdso_support.cc",
-    ],
-    hdrs = [
-        "internal/address_is_readable.h",
-        "internal/elf_mem_image.h",
-        "internal/vdso_support.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:dynamic_annotations",
-        "//absl/base:errno_saver",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "demangle_internal",
-    srcs = ["internal/demangle.cc"],
-    hdrs = ["internal/demangle.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_test(
-    name = "demangle_test",
-    srcs = ["internal/demangle_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":demangle_internal",
-        ":stack_consumption",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "leak_check",
-    srcs = ["leak_check.cc"],
-    hdrs = ["leak_check.h"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-# Adding a dependency to leak_check_disable will disable
-# sanitizer leak checking (asan/lsan) in a test without
-# the need to mess around with build features.
-cc_library(
-    name = "leak_check_disable",
-    srcs = ["leak_check_disable.cc"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    linkstatic = 1,
-    deps = ["//absl/base:config"],
-    alwayslink = 1,
-)
-
-# These targets exists for use in tests only, explicitly configuring the
-# LEAK_SANITIZER macro. It must be linked with -fsanitize=leak for lsan.
-ABSL_LSAN_LINKOPTS = select({
-    "//absl:clang_compiler": ["-fsanitize=leak"],
-    "//conditions:default": [],
-})
-
-cc_library(
-    name = "leak_check_api_enabled_for_testing",
-    testonly = 1,
-    srcs = ["leak_check.cc"],
-    hdrs = ["leak_check.h"],
-    copts = select({
-        "//absl:clang_compiler": ["-DLEAK_SANITIZER"],
-        "//conditions:default": [],
-    }),
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-    ],
-)
-
-cc_library(
-    name = "leak_check_api_disabled_for_testing",
-    testonly = 1,
-    srcs = ["leak_check.cc"],
-    hdrs = ["leak_check.h"],
-    copts = ["-ULEAK_SANITIZER"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-    ],
-)
-
-cc_test(
-    name = "leak_check_test",
-    srcs = ["leak_check_test.cc"],
-    copts = select({
-        "//absl:clang_compiler": ["-DABSL_EXPECT_LEAK_SANITIZER"],
-        "//conditions:default": [],
-    }),
-    linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
-    tags = ["notsan"],
-    deps = [
-        ":leak_check_api_enabled_for_testing",
-        "//absl/base",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "leak_check_no_lsan_test",
-    srcs = ["leak_check_test.cc"],
-    copts = ["-UABSL_EXPECT_LEAK_SANITIZER"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["noasan"],
-    deps = [
-        ":leak_check_api_disabled_for_testing",
-        "//absl/base",  # for raw_logging
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-# Test that leak checking is skipped when lsan is enabled but
-# ":leak_check_disable" is linked in.
-#
-# This test should fail in the absence of a dependency on ":leak_check_disable"
-cc_test(
-    name = "disabled_leak_check_test",
-    srcs = ["leak_check_fail_test.cc"],
-    linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
-    tags = ["notsan"],
-    deps = [
-        ":leak_check_api_enabled_for_testing",
-        ":leak_check_disable",
-        "//absl/base",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "stack_consumption",
-    testonly = 1,
-    srcs = ["internal/stack_consumption.cc"],
-    hdrs = ["internal/stack_consumption.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_test(
-    name = "stack_consumption_test",
-    srcs = ["internal/stack_consumption_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":stack_consumption",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/debugging/CMakeLists.txt b/third_party/abseil/absl/debugging/CMakeLists.txt
deleted file mode 100644
index 074b44c..0000000
--- a/third_party/abseil/absl/debugging/CMakeLists.txt
+++ /dev/null
@@ -1,338 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    stacktrace
-  HDRS
-    "stacktrace.h"
-    "internal/stacktrace_aarch64-inl.inc"
-    "internal/stacktrace_arm-inl.inc"
-    "internal/stacktrace_config.h"
-    "internal/stacktrace_generic-inl.inc"
-    "internal/stacktrace_powerpc-inl.inc"
-    "internal/stacktrace_unimplemented-inl.inc"
-    "internal/stacktrace_win32-inl.inc"
-    "internal/stacktrace_x86-inl.inc"
-  SRCS
-    "stacktrace.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::debugging_internal
-    absl::config
-    absl::core_headers
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    symbolize
-  HDRS
-    "symbolize.h"
-    "internal/symbolize.h"
-  SRCS
-    "symbolize.cc"
-    "symbolize_darwin.inc"
-    "symbolize_elf.inc"
-    "symbolize_unimplemented.inc"
-    "symbolize_win32.inc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-    $<$<BOOL:${MINGW}>:"dbghelp">
-  DEPS
-    absl::debugging_internal
-    absl::demangle_internal
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::dynamic_annotations
-    absl::malloc_internal
-    absl::raw_logging_internal
-    absl::strings
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    symbolize_test
-  SRCS
-    "symbolize_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    $<$<BOOL:${MSVC}>:-Z7>
-  LINKOPTS
-    $<$<BOOL:${MSVC}>:-DEBUG>
-  DEPS
-    absl::stack_consumption
-    absl::symbolize
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::memory
-    absl::raw_logging_internal
-    absl::strings
-    gmock
-)
-
-absl_cc_library(
-  NAME
-    examine_stack
-  HDRS
-    "internal/examine_stack.h"
-  SRCS
-    "internal/examine_stack.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::stacktrace
-    absl::symbolize
-    absl::config
-    absl::core_headers
-    absl::raw_logging_internal
-)
-
-absl_cc_library(
-  NAME
-    failure_signal_handler
-  HDRS
-    "failure_signal_handler.h"
-  SRCS
-    "failure_signal_handler.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::examine_stack
-    absl::stacktrace
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::errno_saver
-    absl::raw_logging_internal
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    failure_signal_handler_test
-  SRCS
-    "failure_signal_handler_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::failure_signal_handler
-    absl::stacktrace
-    absl::symbolize
-    absl::strings
-    absl::raw_logging_internal
-    Threads::Threads
-    gmock
-)
-
-absl_cc_library(
-  NAME
-    debugging_internal
-  HDRS
-    "internal/address_is_readable.h"
-    "internal/elf_mem_image.h"
-    "internal/vdso_support.h"
-  SRCS
-    "internal/address_is_readable.cc"
-    "internal/elf_mem_image.cc"
-    "internal/vdso_support.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::core_headers
-    absl::config
-    absl::dynamic_annotations
-    absl::errno_saver
-    absl::raw_logging_internal
-)
-
-absl_cc_library(
-  NAME
-    demangle_internal
-  HDRS
-    "internal/demangle.h"
-  SRCS
-    "internal/demangle.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base
-    absl::core_headers
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    demangle_test
-  SRCS
-    "internal/demangle_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::demangle_internal
-    absl::stack_consumption
-    absl::config
-    absl::core_headers
-    absl::memory
-    absl::raw_logging_internal
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    leak_check
-  HDRS
-    "leak_check.h"
-  SRCS
-    "leak_check.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    leak_check_disable
-  SRCS
-    "leak_check_disable.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    leak_check_api_enabled_for_testing
-  HDRS
-    "leak_check.h"
-  SRCS
-    "leak_check.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    $<$<BOOL:${ABSL_HAVE_LSAN}>:-DLEAK_SANITIZER>
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    leak_check_api_disabled_for_testing
-  HDRS
-    "leak_check.h"
-  SRCS
-    "leak_check.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    "-ULEAK_SANITIZER"
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    leak_check_test
-  SRCS
-    "leak_check_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    "$<$<BOOL:${ABSL_HAVE_LSAN}>:-DABSL_EXPECT_LEAK_SANITIZER>"
-  LINKOPTS
-    "${ABSL_LSAN_LINKOPTS}"
-  DEPS
-    absl::leak_check_api_enabled_for_testing
-    absl::base
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    leak_check_no_lsan_test
-  SRCS
-    "leak_check_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    "-UABSL_EXPECT_LEAK_SANITIZER"
-  DEPS
-    absl::leak_check_api_disabled_for_testing
-    absl::base
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    disabled_leak_check_test
-  SRCS
-    "leak_check_fail_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    "${ABSL_LSAN_LINKOPTS}"
-  DEPS
-    absl::leak_check_api_enabled_for_testing
-    absl::leak_check_disable
-    absl::base
-    absl::raw_logging_internal
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    stack_consumption
-  HDRS
-    "internal/stack_consumption.h"
-  SRCS
-    "internal/stack_consumption.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::raw_logging_internal
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    stack_consumption_test
-  SRCS
-    "internal/stack_consumption_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::stack_consumption
-    absl::core_headers
-    absl::raw_logging_internal
-    gmock_main
-)
-
-# component target
-absl_cc_library(
-  NAME
-    debugging
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::stacktrace
-    absl::leak_check
-  PUBLIC
-)
diff --git a/third_party/abseil/absl/debugging/failure_signal_handler.cc b/third_party/abseil/absl/debugging/failure_signal_handler.cc
deleted file mode 100644
index 5d13bdb..0000000
--- a/third_party/abseil/absl/debugging/failure_signal_handler.cc
+++ /dev/null
@@ -1,370 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#include "absl/debugging/failure_signal_handler.h"
-
-#include "absl/base/config.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#else
-#include <unistd.h>
-#endif
-
-#ifdef __APPLE__
-#include <TargetConditionals.h>
-#endif
-
-#ifdef ABSL_HAVE_MMAP
-#include <sys/mman.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <cerrno>
-#include <csignal>
-#include <cstdio>
-#include <cstring>
-#include <ctime>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/errno_saver.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/sysinfo.h"
-#include "absl/debugging/internal/examine_stack.h"
-#include "absl/debugging/stacktrace.h"
-
-#ifndef _WIN32
-#define ABSL_HAVE_SIGACTION
-// Apple WatchOS and TVOS don't allow sigaltstack
-#if !(defined(TARGET_OS_WATCH) && TARGET_OS_WATCH) && \
-    !(defined(TARGET_OS_TV) && TARGET_OS_TV)
-#define ABSL_HAVE_SIGALTSTACK
-#endif
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-ABSL_CONST_INIT static FailureSignalHandlerOptions fsh_options;
-
-// Resets the signal handler for signo to the default action for that
-// signal, then raises the signal.
-static void RaiseToDefaultHandler(int signo) {
-  signal(signo, SIG_DFL);
-  raise(signo);
-}
-
-struct FailureSignalData {
-  const int signo;
-  const char* const as_string;
-#ifdef ABSL_HAVE_SIGACTION
-  struct sigaction previous_action;
-  // StructSigaction is used to silence -Wmissing-field-initializers.
-  using StructSigaction = struct sigaction;
-  #define FSD_PREVIOUS_INIT FailureSignalData::StructSigaction()
-#else
-  void (*previous_handler)(int);
-  #define FSD_PREVIOUS_INIT SIG_DFL
-#endif
-};
-
-ABSL_CONST_INIT static FailureSignalData failure_signal_data[] = {
-    {SIGSEGV, "SIGSEGV", FSD_PREVIOUS_INIT},
-    {SIGILL, "SIGILL", FSD_PREVIOUS_INIT},
-    {SIGFPE, "SIGFPE", FSD_PREVIOUS_INIT},
-    {SIGABRT, "SIGABRT", FSD_PREVIOUS_INIT},
-    {SIGTERM, "SIGTERM", FSD_PREVIOUS_INIT},
-#ifndef _WIN32
-    {SIGBUS, "SIGBUS", FSD_PREVIOUS_INIT},
-    {SIGTRAP, "SIGTRAP", FSD_PREVIOUS_INIT},
-#endif
-};
-
-#undef FSD_PREVIOUS_INIT
-
-static void RaiseToPreviousHandler(int signo) {
-  // Search for the previous handler.
-  for (const auto& it : failure_signal_data) {
-    if (it.signo == signo) {
-#ifdef ABSL_HAVE_SIGACTION
-      sigaction(signo, &it.previous_action, nullptr);
-#else
-      signal(signo, it.previous_handler);
-#endif
-      raise(signo);
-      return;
-    }
-  }
-
-  // Not found, use the default handler.
-  RaiseToDefaultHandler(signo);
-}
-
-namespace debugging_internal {
-
-const char* FailureSignalToString(int signo) {
-  for (const auto& it : failure_signal_data) {
-    if (it.signo == signo) {
-      return it.as_string;
-    }
-  }
-  return "";
-}
-
-}  // namespace debugging_internal
-
-#ifdef ABSL_HAVE_SIGALTSTACK
-
-static bool SetupAlternateStackOnce() {
-#if defined(__wasm__) || defined (__asjms__)
-  const size_t page_mask = getpagesize() - 1;
-#else
-  const size_t page_mask = sysconf(_SC_PAGESIZE) - 1;
-#endif
-  size_t stack_size = (std::max(SIGSTKSZ, 65536) + page_mask) & ~page_mask;
-#if defined(ABSL_HAVE_ADDRESS_SANITIZER) || \
-    defined(ABSL_HAVE_MEMORY_SANITIZER) || defined(ABSL_HAVE_THREAD_SANITIZER)
-  // Account for sanitizer instrumentation requiring additional stack space.
-  stack_size *= 5;
-#endif
-
-  stack_t sigstk;
-  memset(&sigstk, 0, sizeof(sigstk));
-  sigstk.ss_size = stack_size;
-
-#ifdef ABSL_HAVE_MMAP
-#ifndef MAP_STACK
-#define MAP_STACK 0
-#endif
-#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-  sigstk.ss_sp = mmap(nullptr, sigstk.ss_size, PROT_READ | PROT_WRITE,
-                      MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
-  if (sigstk.ss_sp == MAP_FAILED) {
-    ABSL_RAW_LOG(FATAL, "mmap() for alternate signal stack failed");
-  }
-#else
-  sigstk.ss_sp = malloc(sigstk.ss_size);
-  if (sigstk.ss_sp == nullptr) {
-    ABSL_RAW_LOG(FATAL, "malloc() for alternate signal stack failed");
-  }
-#endif
-
-  if (sigaltstack(&sigstk, nullptr) != 0) {
-    ABSL_RAW_LOG(FATAL, "sigaltstack() failed with errno=%d", errno);
-  }
-  return true;
-}
-
-#endif
-
-#ifdef ABSL_HAVE_SIGACTION
-
-// Sets up an alternate stack for signal handlers once.
-// Returns the appropriate flag for sig_action.sa_flags
-// if the system supports using an alternate stack.
-static int MaybeSetupAlternateStack() {
-#ifdef ABSL_HAVE_SIGALTSTACK
-  ABSL_ATTRIBUTE_UNUSED static const bool kOnce = SetupAlternateStackOnce();
-  return SA_ONSTACK;
-#else
-  return 0;
-#endif
-}
-
-static void InstallOneFailureHandler(FailureSignalData* data,
-                                     void (*handler)(int, siginfo_t*, void*)) {
-  struct sigaction act;
-  memset(&act, 0, sizeof(act));
-  sigemptyset(&act.sa_mask);
-  act.sa_flags |= SA_SIGINFO;
-  // SA_NODEFER is required to handle SIGABRT from
-  // ImmediateAbortSignalHandler().
-  act.sa_flags |= SA_NODEFER;
-  if (fsh_options.use_alternate_stack) {
-    act.sa_flags |= MaybeSetupAlternateStack();
-  }
-  act.sa_sigaction = handler;
-  ABSL_RAW_CHECK(sigaction(data->signo, &act, &data->previous_action) == 0,
-                 "sigaction() failed");
-}
-
-#else
-
-static void InstallOneFailureHandler(FailureSignalData* data,
-                                     void (*handler)(int)) {
-  data->previous_handler = signal(data->signo, handler);
-  ABSL_RAW_CHECK(data->previous_handler != SIG_ERR, "signal() failed");
-}
-
-#endif
-
-static void WriteToStderr(const char* data) {
-  absl::base_internal::ErrnoSaver errno_saver;
-  absl::raw_logging_internal::SafeWriteToStderr(data, strlen(data));
-}
-
-static void WriteSignalMessage(int signo, void (*writerfn)(const char*)) {
-  char buf[64];
-  const char* const signal_string =
-      debugging_internal::FailureSignalToString(signo);
-  if (signal_string != nullptr && signal_string[0] != '\0') {
-    snprintf(buf, sizeof(buf), "*** %s received at time=%ld ***\n",
-             signal_string,
-             static_cast<long>(time(nullptr)));  // NOLINT(runtime/int)
-  } else {
-    snprintf(buf, sizeof(buf), "*** Signal %d received at time=%ld ***\n",
-             signo, static_cast<long>(time(nullptr)));  // NOLINT(runtime/int)
-  }
-  writerfn(buf);
-}
-
-// `void*` might not be big enough to store `void(*)(const char*)`.
-struct WriterFnStruct {
-  void (*writerfn)(const char*);
-};
-
-// Many of the absl::debugging_internal::Dump* functions in
-// examine_stack.h take a writer function pointer that has a void* arg
-// for historical reasons. failure_signal_handler_writer only takes a
-// data pointer. This function converts between these types.
-static void WriterFnWrapper(const char* data, void* arg) {
-  static_cast<WriterFnStruct*>(arg)->writerfn(data);
-}
-
-// Convenient wrapper around DumpPCAndFrameSizesAndStackTrace() for signal
-// handlers. "noinline" so that GetStackFrames() skips the top-most stack
-// frame for this function.
-ABSL_ATTRIBUTE_NOINLINE static void WriteStackTrace(
-    void* ucontext, bool symbolize_stacktrace,
-    void (*writerfn)(const char*, void*), void* writerfn_arg) {
-  constexpr int kNumStackFrames = 32;
-  void* stack[kNumStackFrames];
-  int frame_sizes[kNumStackFrames];
-  int min_dropped_frames;
-  int depth = absl::GetStackFramesWithContext(
-      stack, frame_sizes, kNumStackFrames,
-      1,  // Do not include this function in stack trace.
-      ucontext, &min_dropped_frames);
-  absl::debugging_internal::DumpPCAndFrameSizesAndStackTrace(
-      absl::debugging_internal::GetProgramCounter(ucontext), stack, frame_sizes,
-      depth, min_dropped_frames, symbolize_stacktrace, writerfn, writerfn_arg);
-}
-
-// Called by AbslFailureSignalHandler() to write the failure info. It is
-// called once with writerfn set to WriteToStderr() and then possibly
-// with writerfn set to the user provided function.
-static void WriteFailureInfo(int signo, void* ucontext,
-                             void (*writerfn)(const char*)) {
-  WriterFnStruct writerfn_struct{writerfn};
-  WriteSignalMessage(signo, writerfn);
-  WriteStackTrace(ucontext, fsh_options.symbolize_stacktrace, WriterFnWrapper,
-                  &writerfn_struct);
-}
-
-// absl::SleepFor() can't be used here since AbslInternalSleepFor()
-// may be overridden to do something that isn't async-signal-safe on
-// some platforms.
-static void PortableSleepForSeconds(int seconds) {
-#ifdef _WIN32
-  Sleep(seconds * 1000);
-#else
-  struct timespec sleep_time;
-  sleep_time.tv_sec = seconds;
-  sleep_time.tv_nsec = 0;
-  while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR) {}
-#endif
-}
-
-#ifdef ABSL_HAVE_ALARM
-// AbslFailureSignalHandler() installs this as a signal handler for
-// SIGALRM, then sets an alarm to be delivered to the program after a
-// set amount of time. If AbslFailureSignalHandler() hangs for more than
-// the alarm timeout, ImmediateAbortSignalHandler() will abort the
-// program.
-static void ImmediateAbortSignalHandler(int) {
-  RaiseToDefaultHandler(SIGABRT);
-}
-#endif
-
-// absl::base_internal::GetTID() returns pid_t on most platforms, but
-// returns absl::base_internal::pid_t on Windows.
-using GetTidType = decltype(absl::base_internal::GetTID());
-ABSL_CONST_INIT static std::atomic<GetTidType> failed_tid(0);
-
-#ifndef ABSL_HAVE_SIGACTION
-static void AbslFailureSignalHandler(int signo) {
-  void* ucontext = nullptr;
-#else
-static void AbslFailureSignalHandler(int signo, siginfo_t*, void* ucontext) {
-#endif
-
-  const GetTidType this_tid = absl::base_internal::GetTID();
-  GetTidType previous_failed_tid = 0;
-  if (!failed_tid.compare_exchange_strong(
-          previous_failed_tid, static_cast<intptr_t>(this_tid),
-          std::memory_order_acq_rel, std::memory_order_relaxed)) {
-    ABSL_RAW_LOG(
-        ERROR,
-        "Signal %d raised at PC=%p while already in AbslFailureSignalHandler()",
-        signo, absl::debugging_internal::GetProgramCounter(ucontext));
-    if (this_tid != previous_failed_tid) {
-      // Another thread is already in AbslFailureSignalHandler(), so wait
-      // a bit for it to finish. If the other thread doesn't kill us,
-      // we do so after sleeping.
-      PortableSleepForSeconds(3);
-      RaiseToDefaultHandler(signo);
-      // The recursively raised signal may be blocked until we return.
-      return;
-    }
-  }
-
-#ifdef ABSL_HAVE_ALARM
-  // Set an alarm to abort the program in case this code hangs or deadlocks.
-  if (fsh_options.alarm_on_failure_secs > 0) {
-    alarm(0);  // Cancel any existing alarms.
-    signal(SIGALRM, ImmediateAbortSignalHandler);
-    alarm(fsh_options.alarm_on_failure_secs);
-  }
-#endif
-
-  // First write to stderr.
-  WriteFailureInfo(signo, ucontext, WriteToStderr);
-
-  // Riskier code (because it is less likely to be async-signal-safe)
-  // goes after this point.
-  if (fsh_options.writerfn != nullptr) {
-    WriteFailureInfo(signo, ucontext, fsh_options.writerfn);
-  }
-
-  if (fsh_options.call_previous_handler) {
-    RaiseToPreviousHandler(signo);
-  } else {
-    RaiseToDefaultHandler(signo);
-  }
-}
-
-void InstallFailureSignalHandler(const FailureSignalHandlerOptions& options) {
-  fsh_options = options;
-  for (auto& it : failure_signal_data) {
-    InstallOneFailureHandler(&it, AbslFailureSignalHandler);
-  }
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/failure_signal_handler.h b/third_party/abseil/absl/debugging/failure_signal_handler.h
deleted file mode 100644
index 0c0f585..0000000
--- a/third_party/abseil/absl/debugging/failure_signal_handler.h
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: failure_signal_handler.h
-// -----------------------------------------------------------------------------
-//
-// This file configures the Abseil *failure signal handler* to capture and dump
-// useful debugging information (such as a stacktrace) upon program failure.
-//
-// To use the failure signal handler, call `absl::InstallFailureSignalHandler()`
-// very early in your program, usually in the first few lines of main():
-//
-// int main(int argc, char** argv) {
-//   // Initialize the symbolizer to get a human-readable stack trace
-//   absl::InitializeSymbolizer(argv[0]);
-//
-//   absl::FailureSignalHandlerOptions options;
-//   absl::InstallFailureSignalHandler(options);
-//   DoSomethingInteresting();
-//   return 0;
-// }
-//
-// Any program that raises a fatal signal (such as `SIGSEGV`, `SIGILL`,
-// `SIGFPE`, `SIGABRT`, `SIGTERM`, `SIGBUG`, and `SIGTRAP`) will call the
-// installed failure signal handler and provide debugging information to stderr.
-//
-// Note that you should *not* install the Abseil failure signal handler more
-// than once. You may, of course, have another (non-Abseil) failure signal
-// handler installed (which would be triggered if Abseil's failure signal
-// handler sets `call_previous_handler` to `true`).
-
-#ifndef ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_
-#define ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// FailureSignalHandlerOptions
-//
-// Struct for holding `absl::InstallFailureSignalHandler()` configuration
-// options.
-struct FailureSignalHandlerOptions {
-  // If true, try to symbolize the stacktrace emitted on failure, provided that
-  // you have initialized a symbolizer for that purpose. (See symbolize.h for
-  // more information.)
-  bool symbolize_stacktrace = true;
-
-  // If true, try to run signal handlers on an alternate stack (if supported on
-  // the given platform). An alternate stack is useful for program crashes due
-  // to a stack overflow; by running on a alternate stack, the signal handler
-  // may run even when normal stack space has been exausted. The downside of
-  // using an alternate stack is that extra memory for the alternate stack needs
-  // to be pre-allocated.
-  bool use_alternate_stack = true;
-
-  // If positive, indicates the number of seconds after which the failure signal
-  // handler is invoked to abort the program. Setting such an alarm is useful in
-  // cases where the failure signal handler itself may become hung or
-  // deadlocked.
-  int alarm_on_failure_secs = 3;
-
-  // If true, call the previously registered signal handler for the signal that
-  // was received (if one was registered) after the existing signal handler
-  // runs. This mechanism can be used to chain signal handlers together.
-  //
-  // If false, the signal is raised to the default handler for that signal
-  // (which normally terminates the program).
-  //
-  // IMPORTANT: If true, the chained fatal signal handlers must not try to
-  // recover from the fatal signal. Instead, they should terminate the program
-  // via some mechanism, like raising the default handler for the signal, or by
-  // calling `_exit()`. Note that the failure signal handler may put parts of
-  // the Abseil library into a state from which they cannot recover.
-  bool call_previous_handler = false;
-
-  // If non-null, indicates a pointer to a callback function that will be called
-  // upon failure, with a string argument containing failure data. This function
-  // may be used as a hook to write failure data to a secondary location, such
-  // as a log file. This function may also be called with null data, as a hint
-  // to flush any buffered data before the program may be terminated. Consider
-  // flushing any buffered data in all calls to this function.
-  //
-  // Since this function runs within a signal handler, it should be
-  // async-signal-safe if possible.
-  // See http://man7.org/linux/man-pages/man7/signal-safety.7.html
-  void (*writerfn)(const char*) = nullptr;
-};
-
-// InstallFailureSignalHandler()
-//
-// Installs a signal handler for the common failure signals `SIGSEGV`, `SIGILL`,
-// `SIGFPE`, `SIGABRT`, `SIGTERM`, `SIGBUG`, and `SIGTRAP` (provided they exist
-// on the given platform). The failure signal handler dumps program failure data
-// useful for debugging in an unspecified format to stderr. This data may
-// include the program counter, a stacktrace, and register information on some
-// systems; do not rely on an exact format for the output, as it is subject to
-// change.
-void InstallFailureSignalHandler(const FailureSignalHandlerOptions& options);
-
-namespace debugging_internal {
-const char* FailureSignalToString(int signo);
-}  // namespace debugging_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_
diff --git a/third_party/abseil/absl/debugging/failure_signal_handler_test.cc b/third_party/abseil/absl/debugging/failure_signal_handler_test.cc
deleted file mode 100644
index d8283b2..0000000
--- a/third_party/abseil/absl/debugging/failure_signal_handler_test.cc
+++ /dev/null
@@ -1,159 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#include "absl/debugging/failure_signal_handler.h"
-
-#include <csignal>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-
-#include "gtest/gtest.h"
-#include "gmock/gmock.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/strings/match.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-using testing::StartsWith;
-
-#if GTEST_HAS_DEATH_TEST
-
-// For the parameterized death tests. GetParam() returns the signal number.
-using FailureSignalHandlerDeathTest = ::testing::TestWithParam<int>;
-
-// This function runs in a fork()ed process on most systems.
-void InstallHandlerAndRaise(int signo) {
-  absl::InstallFailureSignalHandler(absl::FailureSignalHandlerOptions());
-  raise(signo);
-}
-
-TEST_P(FailureSignalHandlerDeathTest, AbslFailureSignal) {
-  const int signo = GetParam();
-  std::string exit_regex = absl::StrCat(
-      "\\*\\*\\* ", absl::debugging_internal::FailureSignalToString(signo),
-      " received at time=");
-#ifndef _WIN32
-  EXPECT_EXIT(InstallHandlerAndRaise(signo), testing::KilledBySignal(signo),
-              exit_regex);
-#else
-  // Windows doesn't have testing::KilledBySignal().
-  EXPECT_DEATH_IF_SUPPORTED(InstallHandlerAndRaise(signo), exit_regex);
-#endif
-}
-
-ABSL_CONST_INIT FILE* error_file = nullptr;
-
-void WriteToErrorFile(const char* msg) {
-  if (msg != nullptr) {
-    ABSL_RAW_CHECK(fwrite(msg, strlen(msg), 1, error_file) == 1,
-                   "fwrite() failed");
-  }
-  ABSL_RAW_CHECK(fflush(error_file) == 0, "fflush() failed");
-}
-
-std::string GetTmpDir() {
-  // TEST_TMPDIR is set by Bazel. Try the others when not running under Bazel.
-  static const char* const kTmpEnvVars[] = {"TEST_TMPDIR", "TMPDIR", "TEMP",
-                                            "TEMPDIR", "TMP"};
-  for (const char* const var : kTmpEnvVars) {
-    const char* tmp_dir = std::getenv(var);
-    if (tmp_dir != nullptr) {
-      return tmp_dir;
-    }
-  }
-
-  // Try something reasonable.
-  return "/tmp";
-}
-
-// This function runs in a fork()ed process on most systems.
-void InstallHandlerWithWriteToFileAndRaise(const char* file, int signo) {
-  error_file = fopen(file, "w");
-  ABSL_RAW_CHECK(error_file != nullptr, "Failed create error_file");
-  absl::FailureSignalHandlerOptions options;
-  options.writerfn = WriteToErrorFile;
-  absl::InstallFailureSignalHandler(options);
-  raise(signo);
-}
-
-TEST_P(FailureSignalHandlerDeathTest, AbslFatalSignalsWithWriterFn) {
-  const int signo = GetParam();
-  std::string tmp_dir = GetTmpDir();
-  std::string file = absl::StrCat(tmp_dir, "/signo_", signo);
-
-  std::string exit_regex = absl::StrCat(
-      "\\*\\*\\* ", absl::debugging_internal::FailureSignalToString(signo),
-      " received at time=");
-#ifndef _WIN32
-  EXPECT_EXIT(InstallHandlerWithWriteToFileAndRaise(file.c_str(), signo),
-              testing::KilledBySignal(signo), exit_regex);
-#else
-  // Windows doesn't have testing::KilledBySignal().
-  EXPECT_DEATH_IF_SUPPORTED(
-      InstallHandlerWithWriteToFileAndRaise(file.c_str(), signo), exit_regex);
-#endif
-
-  // Open the file in this process and check its contents.
-  std::fstream error_output(file);
-  ASSERT_TRUE(error_output.is_open()) << file;
-  std::string error_line;
-  std::getline(error_output, error_line);
-  EXPECT_THAT(
-      error_line,
-      StartsWith(absl::StrCat(
-          "*** ", absl::debugging_internal::FailureSignalToString(signo),
-          " received at ")));
-
-  if (absl::debugging_internal::StackTraceWorksForTest()) {
-    std::getline(error_output, error_line);
-    EXPECT_THAT(error_line, StartsWith("PC: "));
-  }
-}
-
-constexpr int kFailureSignals[] = {
-    SIGSEGV, SIGILL,  SIGFPE, SIGABRT, SIGTERM,
-#ifndef _WIN32
-    SIGBUS,  SIGTRAP,
-#endif
-};
-
-std::string SignalParamToString(const ::testing::TestParamInfo<int>& info) {
-  std::string result =
-      absl::debugging_internal::FailureSignalToString(info.param);
-  if (result.empty()) {
-    result = absl::StrCat(info.param);
-  }
-  return result;
-}
-
-INSTANTIATE_TEST_SUITE_P(AbslDeathTest, FailureSignalHandlerDeathTest,
-                         ::testing::ValuesIn(kFailureSignals),
-                         SignalParamToString);
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace
-
-int main(int argc, char** argv) {
-  absl::InitializeSymbolizer(argv[0]);
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/abseil/absl/debugging/internal/address_is_readable.cc b/third_party/abseil/absl/debugging/internal/address_is_readable.cc
deleted file mode 100644
index 329c285..0000000
--- a/third_party/abseil/absl/debugging/internal/address_is_readable.cc
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// base::AddressIsReadable() probes an address to see whether it is readable,
-// without faulting.
-
-#include "absl/debugging/internal/address_is_readable.h"
-
-#if !defined(__linux__) || defined(__ANDROID__)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// On platforms other than Linux, just return true.
-bool AddressIsReadable(const void* /* addr */) { return true; }
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else
-
-#include <fcntl.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#include <atomic>
-#include <cerrno>
-#include <cstdint>
-
-#include "absl/base/internal/errno_saver.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Pack a pid and two file descriptors into a 64-bit word,
-// using 16, 24, and 24 bits for each respectively.
-static uint64_t Pack(uint64_t pid, uint64_t read_fd, uint64_t write_fd) {
-  ABSL_RAW_CHECK((read_fd >> 24) == 0 && (write_fd >> 24) == 0,
-                 "fd out of range");
-  return (pid << 48) | ((read_fd & 0xffffff) << 24) | (write_fd & 0xffffff);
-}
-
-// Unpack x into a pid and two file descriptors, where x was created with
-// Pack().
-static void Unpack(uint64_t x, int *pid, int *read_fd, int *write_fd) {
-  *pid = x >> 48;
-  *read_fd = (x >> 24) & 0xffffff;
-  *write_fd = x & 0xffffff;
-}
-
-// Return whether the byte at *addr is readable, without faulting.
-// Save and restores errno.   Returns true on systems where
-// unimplemented.
-// This is a namespace-scoped variable for correct zero-initialization.
-static std::atomic<uint64_t> pid_and_fds;  // initially 0, an invalid pid.
-
-bool AddressIsReadable(const void *addr) {
-  absl::base_internal::ErrnoSaver errno_saver;
-  // We test whether a byte is readable by using write().  Normally, this would
-  // be done via a cached file descriptor to /dev/null, but linux fails to
-  // check whether the byte is readable when the destination is /dev/null, so
-  // we use a cached pipe.  We store the pid of the process that created the
-  // pipe to handle the case where a process forks, and the child closes all
-  // the file descriptors and then calls this routine.  This is not perfect:
-  // the child could use the routine, then close all file descriptors and then
-  // use this routine again.  But the likely use of this routine is when
-  // crashing, to test the validity of pages when dumping the stack.  Beware
-  // that we may leak file descriptors, but we're unlikely to leak many.
-  int bytes_written;
-  int current_pid = getpid() & 0xffff;   // we use only the low order 16 bits
-  do {  // until we do not get EBADF trying to use file descriptors
-    int pid;
-    int read_fd;
-    int write_fd;
-    uint64_t local_pid_and_fds = pid_and_fds.load(std::memory_order_acquire);
-    Unpack(local_pid_and_fds, &pid, &read_fd, &write_fd);
-    while (current_pid != pid) {
-      int p[2];
-      // new pipe
-      if (pipe(p) != 0) {
-        ABSL_RAW_LOG(FATAL, "Failed to create pipe, errno=%d", errno);
-      }
-      fcntl(p[0], F_SETFD, FD_CLOEXEC);
-      fcntl(p[1], F_SETFD, FD_CLOEXEC);
-      uint64_t new_pid_and_fds = Pack(current_pid, p[0], p[1]);
-      if (pid_and_fds.compare_exchange_strong(
-              local_pid_and_fds, new_pid_and_fds, std::memory_order_release,
-              std::memory_order_relaxed)) {
-        local_pid_and_fds = new_pid_and_fds;  // fds exposed to other threads
-      } else {  // fds not exposed to other threads; we can close them.
-        close(p[0]);
-        close(p[1]);
-        local_pid_and_fds = pid_and_fds.load(std::memory_order_acquire);
-      }
-      Unpack(local_pid_and_fds, &pid, &read_fd, &write_fd);
-    }
-    errno = 0;
-    // Use syscall(SYS_write, ...) instead of write() to prevent ASAN
-    // and other checkers from complaining about accesses to arbitrary
-    // memory.
-    do {
-      bytes_written = syscall(SYS_write, write_fd, addr, 1);
-    } while (bytes_written == -1 && errno == EINTR);
-    if (bytes_written == 1) {   // remove the byte from the pipe
-      char c;
-      while (read(read_fd, &c, 1) == -1 && errno == EINTR) {
-      }
-    }
-    if (errno == EBADF) {  // Descriptors invalid.
-      // If pid_and_fds contains the problematic file descriptors we just used,
-      // this call will forget them, and the loop will try again.
-      pid_and_fds.compare_exchange_strong(local_pid_and_fds, 0,
-                                          std::memory_order_release,
-                                          std::memory_order_relaxed);
-    }
-  } while (errno == EBADF);
-  return bytes_written == 1;
-}
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif
diff --git a/third_party/abseil/absl/debugging/internal/address_is_readable.h b/third_party/abseil/absl/debugging/internal/address_is_readable.h
deleted file mode 100644
index 4bbaf4d..0000000
--- a/third_party/abseil/absl/debugging/internal/address_is_readable.h
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_ADDRESS_IS_READABLE_H_
-#define ABSL_DEBUGGING_INTERNAL_ADDRESS_IS_READABLE_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Return whether the byte at *addr is readable, without faulting.
-// Save and restores errno.
-bool AddressIsReadable(const void *addr);
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_ADDRESS_IS_READABLE_H_
diff --git a/third_party/abseil/absl/debugging/internal/demangle.cc b/third_party/abseil/absl/debugging/internal/demangle.cc
deleted file mode 100644
index 46cdb67..0000000
--- a/third_party/abseil/absl/debugging/internal/demangle.cc
+++ /dev/null
@@ -1,1945 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// For reference check out:
-// https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling
-//
-// Note that we only have partial C++11 support yet.
-
-#include "absl/debugging/internal/demangle.h"
-
-#include <cstdint>
-#include <cstdio>
-#include <limits>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-typedef struct {
-  const char *abbrev;
-  const char *real_name;
-  // Number of arguments in <expression> context, or 0 if disallowed.
-  int arity;
-} AbbrevPair;
-
-// List of operators from Itanium C++ ABI.
-static const AbbrevPair kOperatorList[] = {
-    // New has special syntax (not currently supported).
-    {"nw", "new", 0},
-    {"na", "new[]", 0},
-
-    // Works except that the 'gs' prefix is not supported.
-    {"dl", "delete", 1},
-    {"da", "delete[]", 1},
-
-    {"ps", "+", 1},  // "positive"
-    {"ng", "-", 1},  // "negative"
-    {"ad", "&", 1},  // "address-of"
-    {"de", "*", 1},  // "dereference"
-    {"co", "~", 1},
-
-    {"pl", "+", 2},
-    {"mi", "-", 2},
-    {"ml", "*", 2},
-    {"dv", "/", 2},
-    {"rm", "%", 2},
-    {"an", "&", 2},
-    {"or", "|", 2},
-    {"eo", "^", 2},
-    {"aS", "=", 2},
-    {"pL", "+=", 2},
-    {"mI", "-=", 2},
-    {"mL", "*=", 2},
-    {"dV", "/=", 2},
-    {"rM", "%=", 2},
-    {"aN", "&=", 2},
-    {"oR", "|=", 2},
-    {"eO", "^=", 2},
-    {"ls", "<<", 2},
-    {"rs", ">>", 2},
-    {"lS", "<<=", 2},
-    {"rS", ">>=", 2},
-    {"eq", "==", 2},
-    {"ne", "!=", 2},
-    {"lt", "<", 2},
-    {"gt", ">", 2},
-    {"le", "<=", 2},
-    {"ge", ">=", 2},
-    {"nt", "!", 1},
-    {"aa", "&&", 2},
-    {"oo", "||", 2},
-    {"pp", "++", 1},
-    {"mm", "--", 1},
-    {"cm", ",", 2},
-    {"pm", "->*", 2},
-    {"pt", "->", 0},  // Special syntax
-    {"cl", "()", 0},  // Special syntax
-    {"ix", "[]", 2},
-    {"qu", "?", 3},
-    {"st", "sizeof", 0},  // Special syntax
-    {"sz", "sizeof", 1},  // Not a real operator name, but used in expressions.
-    {nullptr, nullptr, 0},
-};
-
-// List of builtin types from Itanium C++ ABI.
-//
-// Invariant: only one- or two-character type abbreviations here.
-static const AbbrevPair kBuiltinTypeList[] = {
-    {"v", "void", 0},
-    {"w", "wchar_t", 0},
-    {"b", "bool", 0},
-    {"c", "char", 0},
-    {"a", "signed char", 0},
-    {"h", "unsigned char", 0},
-    {"s", "short", 0},
-    {"t", "unsigned short", 0},
-    {"i", "int", 0},
-    {"j", "unsigned int", 0},
-    {"l", "long", 0},
-    {"m", "unsigned long", 0},
-    {"x", "long long", 0},
-    {"y", "unsigned long long", 0},
-    {"n", "__int128", 0},
-    {"o", "unsigned __int128", 0},
-    {"f", "float", 0},
-    {"d", "double", 0},
-    {"e", "long double", 0},
-    {"g", "__float128", 0},
-    {"z", "ellipsis", 0},
-
-    {"De", "decimal128", 0},      // IEEE 754r decimal floating point (128 bits)
-    {"Dd", "decimal64", 0},       // IEEE 754r decimal floating point (64 bits)
-    {"Dc", "decltype(auto)", 0},
-    {"Da", "auto", 0},
-    {"Dn", "std::nullptr_t", 0},  // i.e., decltype(nullptr)
-    {"Df", "decimal32", 0},       // IEEE 754r decimal floating point (32 bits)
-    {"Di", "char32_t", 0},
-    {"Du", "char8_t", 0},
-    {"Ds", "char16_t", 0},
-    {"Dh", "float16", 0},         // IEEE 754r half-precision float (16 bits)
-    {nullptr, nullptr, 0},
-};
-
-// List of substitutions Itanium C++ ABI.
-static const AbbrevPair kSubstitutionList[] = {
-    {"St", "", 0},
-    {"Sa", "allocator", 0},
-    {"Sb", "basic_string", 0},
-    // std::basic_string<char, std::char_traits<char>,std::allocator<char> >
-    {"Ss", "string", 0},
-    // std::basic_istream<char, std::char_traits<char> >
-    {"Si", "istream", 0},
-    // std::basic_ostream<char, std::char_traits<char> >
-    {"So", "ostream", 0},
-    // std::basic_iostream<char, std::char_traits<char> >
-    {"Sd", "iostream", 0},
-    {nullptr, nullptr, 0},
-};
-
-// State needed for demangling.  This struct is copied in almost every stack
-// frame, so every byte counts.
-typedef struct {
-  int mangled_idx;                   // Cursor of mangled name.
-  int out_cur_idx;                   // Cursor of output string.
-  int prev_name_idx;                 // For constructors/destructors.
-  signed int prev_name_length : 16;  // For constructors/destructors.
-  signed int nest_level : 15;        // For nested names.
-  unsigned int append : 1;           // Append flag.
-  // Note: for some reason MSVC can't pack "bool append : 1" into the same int
-  // with the above two fields, so we use an int instead.  Amusingly it can pack
-  // "signed bool" as expected, but relying on that to continue to be a legal
-  // type seems ill-advised (as it's illegal in at least clang).
-} ParseState;
-
-static_assert(sizeof(ParseState) == 4 * sizeof(int),
-              "unexpected size of ParseState");
-
-// One-off state for demangling that's not subject to backtracking -- either
-// constant data, data that's intentionally immune to backtracking (steps), or
-// data that would never be changed by backtracking anyway (recursion_depth).
-//
-// Only one copy of this exists for each call to Demangle, so the size of this
-// struct is nearly inconsequential.
-typedef struct {
-  const char *mangled_begin;  // Beginning of input string.
-  char *out;                  // Beginning of output string.
-  int out_end_idx;            // One past last allowed output character.
-  int recursion_depth;        // For stack exhaustion prevention.
-  int steps;               // Cap how much work we'll do, regardless of depth.
-  ParseState parse_state;  // Backtrackable state copied for most frames.
-} State;
-
-namespace {
-// Prevent deep recursion / stack exhaustion.
-// Also prevent unbounded handling of complex inputs.
-class ComplexityGuard {
- public:
-  explicit ComplexityGuard(State *state) : state_(state) {
-    ++state->recursion_depth;
-    ++state->steps;
-  }
-  ~ComplexityGuard() { --state_->recursion_depth; }
-
-  // 256 levels of recursion seems like a reasonable upper limit on depth.
-  // 128 is not enough to demagle synthetic tests from demangle_unittest.txt:
-  // "_ZaaZZZZ..." and "_ZaaZcvZcvZ..."
-  static constexpr int kRecursionDepthLimit = 256;
-
-  // We're trying to pick a charitable upper-limit on how many parse steps are
-  // necessary to handle something that a human could actually make use of.
-  // This is mostly in place as a bound on how much work we'll do if we are
-  // asked to demangle an mangled name from an untrusted source, so it should be
-  // much larger than the largest expected symbol, but much smaller than the
-  // amount of work we can do in, e.g., a second.
-  //
-  // Some real-world symbols from an arbitrary binary started failing between
-  // 2^12 and 2^13, so we multiply the latter by an extra factor of 16 to set
-  // the limit.
-  //
-  // Spending one second on 2^17 parse steps would require each step to take
-  // 7.6us, or ~30000 clock cycles, so it's safe to say this can be done in
-  // under a second.
-  static constexpr int kParseStepsLimit = 1 << 17;
-
-  bool IsTooComplex() const {
-    return state_->recursion_depth > kRecursionDepthLimit ||
-           state_->steps > kParseStepsLimit;
-  }
-
- private:
-  State *state_;
-};
-}  // namespace
-
-// We don't use strlen() in libc since it's not guaranteed to be async
-// signal safe.
-static size_t StrLen(const char *str) {
-  size_t len = 0;
-  while (*str != '\0') {
-    ++str;
-    ++len;
-  }
-  return len;
-}
-
-// Returns true if "str" has at least "n" characters remaining.
-static bool AtLeastNumCharsRemaining(const char *str, int n) {
-  for (int i = 0; i < n; ++i) {
-    if (str[i] == '\0') {
-      return false;
-    }
-  }
-  return true;
-}
-
-// Returns true if "str" has "prefix" as a prefix.
-static bool StrPrefix(const char *str, const char *prefix) {
-  size_t i = 0;
-  while (str[i] != '\0' && prefix[i] != '\0' && str[i] == prefix[i]) {
-    ++i;
-  }
-  return prefix[i] == '\0';  // Consumed everything in "prefix".
-}
-
-static void InitState(State *state, const char *mangled, char *out,
-                      int out_size) {
-  state->mangled_begin = mangled;
-  state->out = out;
-  state->out_end_idx = out_size;
-  state->recursion_depth = 0;
-  state->steps = 0;
-
-  state->parse_state.mangled_idx = 0;
-  state->parse_state.out_cur_idx = 0;
-  state->parse_state.prev_name_idx = 0;
-  state->parse_state.prev_name_length = -1;
-  state->parse_state.nest_level = -1;
-  state->parse_state.append = true;
-}
-
-static inline const char *RemainingInput(State *state) {
-  return &state->mangled_begin[state->parse_state.mangled_idx];
-}
-
-// Returns true and advances "mangled_idx" if we find "one_char_token"
-// at "mangled_idx" position.  It is assumed that "one_char_token" does
-// not contain '\0'.
-static bool ParseOneCharToken(State *state, const char one_char_token) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (RemainingInput(state)[0] == one_char_token) {
-    ++state->parse_state.mangled_idx;
-    return true;
-  }
-  return false;
-}
-
-// Returns true and advances "mangled_cur" if we find "two_char_token"
-// at "mangled_cur" position.  It is assumed that "two_char_token" does
-// not contain '\0'.
-static bool ParseTwoCharToken(State *state, const char *two_char_token) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (RemainingInput(state)[0] == two_char_token[0] &&
-      RemainingInput(state)[1] == two_char_token[1]) {
-    state->parse_state.mangled_idx += 2;
-    return true;
-  }
-  return false;
-}
-
-// Returns true and advances "mangled_cur" if we find any character in
-// "char_class" at "mangled_cur" position.
-static bool ParseCharClass(State *state, const char *char_class) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (RemainingInput(state)[0] == '\0') {
-    return false;
-  }
-  const char *p = char_class;
-  for (; *p != '\0'; ++p) {
-    if (RemainingInput(state)[0] == *p) {
-      ++state->parse_state.mangled_idx;
-      return true;
-    }
-  }
-  return false;
-}
-
-static bool ParseDigit(State *state, int *digit) {
-  char c = RemainingInput(state)[0];
-  if (ParseCharClass(state, "0123456789")) {
-    if (digit != nullptr) {
-      *digit = c - '0';
-    }
-    return true;
-  }
-  return false;
-}
-
-// This function is used for handling an optional non-terminal.
-static bool Optional(bool /*status*/) { return true; }
-
-// This function is used for handling <non-terminal>+ syntax.
-typedef bool (*ParseFunc)(State *);
-static bool OneOrMore(ParseFunc parse_func, State *state) {
-  if (parse_func(state)) {
-    while (parse_func(state)) {
-    }
-    return true;
-  }
-  return false;
-}
-
-// This function is used for handling <non-terminal>* syntax. The function
-// always returns true and must be followed by a termination token or a
-// terminating sequence not handled by parse_func (e.g.
-// ParseOneCharToken(state, 'E')).
-static bool ZeroOrMore(ParseFunc parse_func, State *state) {
-  while (parse_func(state)) {
-  }
-  return true;
-}
-
-// Append "str" at "out_cur_idx".  If there is an overflow, out_cur_idx is
-// set to out_end_idx+1.  The output string is ensured to
-// always terminate with '\0' as long as there is no overflow.
-static void Append(State *state, const char *const str, const int length) {
-  for (int i = 0; i < length; ++i) {
-    if (state->parse_state.out_cur_idx + 1 <
-        state->out_end_idx) {  // +1 for '\0'
-      state->out[state->parse_state.out_cur_idx++] = str[i];
-    } else {
-      // signal overflow
-      state->parse_state.out_cur_idx = state->out_end_idx + 1;
-      break;
-    }
-  }
-  if (state->parse_state.out_cur_idx < state->out_end_idx) {
-    state->out[state->parse_state.out_cur_idx] =
-        '\0';  // Terminate it with '\0'
-  }
-}
-
-// We don't use equivalents in libc to avoid locale issues.
-static bool IsLower(char c) { return c >= 'a' && c <= 'z'; }
-
-static bool IsAlpha(char c) {
-  return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
-}
-
-static bool IsDigit(char c) { return c >= '0' && c <= '9'; }
-
-// Returns true if "str" is a function clone suffix.  These suffixes are used
-// by GCC 4.5.x and later versions (and our locally-modified version of GCC
-// 4.4.x) to indicate functions which have been cloned during optimization.
-// We treat any sequence (.<alpha>+.<digit>+)+ as a function clone suffix.
-static bool IsFunctionCloneSuffix(const char *str) {
-  size_t i = 0;
-  while (str[i] != '\0') {
-    // Consume a single .<alpha>+.<digit>+ sequence.
-    if (str[i] != '.' || !IsAlpha(str[i + 1])) {
-      return false;
-    }
-    i += 2;
-    while (IsAlpha(str[i])) {
-      ++i;
-    }
-    if (str[i] != '.' || !IsDigit(str[i + 1])) {
-      return false;
-    }
-    i += 2;
-    while (IsDigit(str[i])) {
-      ++i;
-    }
-  }
-  return true;  // Consumed everything in "str".
-}
-
-static bool EndsWith(State *state, const char chr) {
-  return state->parse_state.out_cur_idx > 0 &&
-         state->parse_state.out_cur_idx < state->out_end_idx &&
-         chr == state->out[state->parse_state.out_cur_idx - 1];
-}
-
-// Append "str" with some tweaks, iff "append" state is true.
-static void MaybeAppendWithLength(State *state, const char *const str,
-                                  const int length) {
-  if (state->parse_state.append && length > 0) {
-    // Append a space if the output buffer ends with '<' and "str"
-    // starts with '<' to avoid <<<.
-    if (str[0] == '<' && EndsWith(state, '<')) {
-      Append(state, " ", 1);
-    }
-    // Remember the last identifier name for ctors/dtors,
-    // but only if we haven't yet overflown the buffer.
-    if (state->parse_state.out_cur_idx < state->out_end_idx &&
-        (IsAlpha(str[0]) || str[0] == '_')) {
-      state->parse_state.prev_name_idx = state->parse_state.out_cur_idx;
-      state->parse_state.prev_name_length = length;
-    }
-    Append(state, str, length);
-  }
-}
-
-// Appends a positive decimal number to the output if appending is enabled.
-static bool MaybeAppendDecimal(State *state, unsigned int val) {
-  // Max {32-64}-bit unsigned int is 20 digits.
-  constexpr size_t kMaxLength = 20;
-  char buf[kMaxLength];
-
-  // We can't use itoa or sprintf as neither is specified to be
-  // async-signal-safe.
-  if (state->parse_state.append) {
-    // We can't have a one-before-the-beginning pointer, so instead start with
-    // one-past-the-end and manipulate one character before the pointer.
-    char *p = &buf[kMaxLength];
-    do {  // val=0 is the only input that should write a leading zero digit.
-      *--p = (val % 10) + '0';
-      val /= 10;
-    } while (p > buf && val != 0);
-
-    // 'p' landed on the last character we set.  How convenient.
-    Append(state, p, kMaxLength - (p - buf));
-  }
-
-  return true;
-}
-
-// A convenient wrapper around MaybeAppendWithLength().
-// Returns true so that it can be placed in "if" conditions.
-static bool MaybeAppend(State *state, const char *const str) {
-  if (state->parse_state.append) {
-    int length = StrLen(str);
-    MaybeAppendWithLength(state, str, length);
-  }
-  return true;
-}
-
-// This function is used for handling nested names.
-static bool EnterNestedName(State *state) {
-  state->parse_state.nest_level = 0;
-  return true;
-}
-
-// This function is used for handling nested names.
-static bool LeaveNestedName(State *state, int16_t prev_value) {
-  state->parse_state.nest_level = prev_value;
-  return true;
-}
-
-// Disable the append mode not to print function parameters, etc.
-static bool DisableAppend(State *state) {
-  state->parse_state.append = false;
-  return true;
-}
-
-// Restore the append mode to the previous state.
-static bool RestoreAppend(State *state, bool prev_value) {
-  state->parse_state.append = prev_value;
-  return true;
-}
-
-// Increase the nest level for nested names.
-static void MaybeIncreaseNestLevel(State *state) {
-  if (state->parse_state.nest_level > -1) {
-    ++state->parse_state.nest_level;
-  }
-}
-
-// Appends :: for nested names if necessary.
-static void MaybeAppendSeparator(State *state) {
-  if (state->parse_state.nest_level >= 1) {
-    MaybeAppend(state, "::");
-  }
-}
-
-// Cancel the last separator if necessary.
-static void MaybeCancelLastSeparator(State *state) {
-  if (state->parse_state.nest_level >= 1 && state->parse_state.append &&
-      state->parse_state.out_cur_idx >= 2) {
-    state->parse_state.out_cur_idx -= 2;
-    state->out[state->parse_state.out_cur_idx] = '\0';
-  }
-}
-
-// Returns true if the identifier of the given length pointed to by
-// "mangled_cur" is anonymous namespace.
-static bool IdentifierIsAnonymousNamespace(State *state, int length) {
-  // Returns true if "anon_prefix" is a proper prefix of "mangled_cur".
-  static const char anon_prefix[] = "_GLOBAL__N_";
-  return (length > static_cast<int>(sizeof(anon_prefix) - 1) &&
-          StrPrefix(RemainingInput(state), anon_prefix));
-}
-
-// Forward declarations of our parsing functions.
-static bool ParseMangledName(State *state);
-static bool ParseEncoding(State *state);
-static bool ParseName(State *state);
-static bool ParseUnscopedName(State *state);
-static bool ParseNestedName(State *state);
-static bool ParsePrefix(State *state);
-static bool ParseUnqualifiedName(State *state);
-static bool ParseSourceName(State *state);
-static bool ParseLocalSourceName(State *state);
-static bool ParseUnnamedTypeName(State *state);
-static bool ParseNumber(State *state, int *number_out);
-static bool ParseFloatNumber(State *state);
-static bool ParseSeqId(State *state);
-static bool ParseIdentifier(State *state, int length);
-static bool ParseOperatorName(State *state, int *arity);
-static bool ParseSpecialName(State *state);
-static bool ParseCallOffset(State *state);
-static bool ParseNVOffset(State *state);
-static bool ParseVOffset(State *state);
-static bool ParseCtorDtorName(State *state);
-static bool ParseDecltype(State *state);
-static bool ParseType(State *state);
-static bool ParseCVQualifiers(State *state);
-static bool ParseBuiltinType(State *state);
-static bool ParseFunctionType(State *state);
-static bool ParseBareFunctionType(State *state);
-static bool ParseClassEnumType(State *state);
-static bool ParseArrayType(State *state);
-static bool ParsePointerToMemberType(State *state);
-static bool ParseTemplateParam(State *state);
-static bool ParseTemplateTemplateParam(State *state);
-static bool ParseTemplateArgs(State *state);
-static bool ParseTemplateArg(State *state);
-static bool ParseBaseUnresolvedName(State *state);
-static bool ParseUnresolvedName(State *state);
-static bool ParseExpression(State *state);
-static bool ParseExprPrimary(State *state);
-static bool ParseExprCastValue(State *state);
-static bool ParseLocalName(State *state);
-static bool ParseLocalNameSuffix(State *state);
-static bool ParseDiscriminator(State *state);
-static bool ParseSubstitution(State *state, bool accept_std);
-
-// Implementation note: the following code is a straightforward
-// translation of the Itanium C++ ABI defined in BNF with a couple of
-// exceptions.
-//
-// - Support GNU extensions not defined in the Itanium C++ ABI
-// - <prefix> and <template-prefix> are combined to avoid infinite loop
-// - Reorder patterns to shorten the code
-// - Reorder patterns to give greedier functions precedence
-//   We'll mark "Less greedy than" for these cases in the code
-//
-// Each parsing function changes the parse state and returns true on
-// success, or returns false and doesn't change the parse state (note:
-// the parse-steps counter increases regardless of success or failure).
-// To ensure that the parse state isn't changed in the latter case, we
-// save the original state before we call multiple parsing functions
-// consecutively with &&, and restore it if unsuccessful.  See
-// ParseEncoding() as an example of this convention.  We follow the
-// convention throughout the code.
-//
-// Originally we tried to do demangling without following the full ABI
-// syntax but it turned out we needed to follow the full syntax to
-// parse complicated cases like nested template arguments.  Note that
-// implementing a full-fledged demangler isn't trivial (libiberty's
-// cp-demangle.c has +4300 lines).
-//
-// Note that (foo) in <(foo) ...> is a modifier to be ignored.
-//
-// Reference:
-// - Itanium C++ ABI
-//   <https://mentorembedded.github.io/cxx-abi/abi.html#mangling>
-
-// <mangled-name> ::= _Z <encoding>
-static bool ParseMangledName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  return ParseTwoCharToken(state, "_Z") && ParseEncoding(state);
-}
-
-// <encoding> ::= <(function) name> <bare-function-type>
-//            ::= <(data) name>
-//            ::= <special-name>
-static bool ParseEncoding(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  // Implementing the first two productions together as <name>
-  // [<bare-function-type>] avoids exponential blowup of backtracking.
-  //
-  // Since Optional(...) can't fail, there's no need to copy the state for
-  // backtracking.
-  if (ParseName(state) && Optional(ParseBareFunctionType(state))) {
-    return true;
-  }
-
-  if (ParseSpecialName(state)) {
-    return true;
-  }
-  return false;
-}
-
-// <name> ::= <nested-name>
-//        ::= <unscoped-template-name> <template-args>
-//        ::= <unscoped-name>
-//        ::= <local-name>
-static bool ParseName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (ParseNestedName(state) || ParseLocalName(state)) {
-    return true;
-  }
-
-  // We reorganize the productions to avoid re-parsing unscoped names.
-  // - Inline <unscoped-template-name> productions:
-  //   <name> ::= <substitution> <template-args>
-  //          ::= <unscoped-name> <template-args>
-  //          ::= <unscoped-name>
-  // - Merge the two productions that start with unscoped-name:
-  //   <name> ::= <unscoped-name> [<template-args>]
-
-  ParseState copy = state->parse_state;
-  // "std<...>" isn't a valid name.
-  if (ParseSubstitution(state, /*accept_std=*/false) &&
-      ParseTemplateArgs(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Note there's no need to restore state after this since only the first
-  // subparser can fail.
-  return ParseUnscopedName(state) && Optional(ParseTemplateArgs(state));
-}
-
-// <unscoped-name> ::= <unqualified-name>
-//                 ::= St <unqualified-name>
-static bool ParseUnscopedName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (ParseUnqualifiedName(state)) {
-    return true;
-  }
-
-  ParseState copy = state->parse_state;
-  if (ParseTwoCharToken(state, "St") && MaybeAppend(state, "std::") &&
-      ParseUnqualifiedName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <ref-qualifer> ::= R // lvalue method reference qualifier
-//                ::= O // rvalue method reference qualifier
-static inline bool ParseRefQualifier(State *state) {
-  return ParseCharClass(state, "OR");
-}
-
-// <nested-name> ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix>
-//                   <unqualified-name> E
-//               ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
-//                   <template-args> E
-static bool ParseNestedName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'N') && EnterNestedName(state) &&
-      Optional(ParseCVQualifiers(state)) &&
-      Optional(ParseRefQualifier(state)) && ParsePrefix(state) &&
-      LeaveNestedName(state, copy.nest_level) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// This part is tricky.  If we literally translate them to code, we'll
-// end up infinite loop.  Hence we merge them to avoid the case.
-//
-// <prefix> ::= <prefix> <unqualified-name>
-//          ::= <template-prefix> <template-args>
-//          ::= <template-param>
-//          ::= <substitution>
-//          ::= # empty
-// <template-prefix> ::= <prefix> <(template) unqualified-name>
-//                   ::= <template-param>
-//                   ::= <substitution>
-static bool ParsePrefix(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  bool has_something = false;
-  while (true) {
-    MaybeAppendSeparator(state);
-    if (ParseTemplateParam(state) ||
-        ParseSubstitution(state, /*accept_std=*/true) ||
-        ParseUnscopedName(state) ||
-        (ParseOneCharToken(state, 'M') && ParseUnnamedTypeName(state))) {
-      has_something = true;
-      MaybeIncreaseNestLevel(state);
-      continue;
-    }
-    MaybeCancelLastSeparator(state);
-    if (has_something && ParseTemplateArgs(state)) {
-      return ParsePrefix(state);
-    } else {
-      break;
-    }
-  }
-  return true;
-}
-
-// <unqualified-name> ::= <operator-name>
-//                    ::= <ctor-dtor-name>
-//                    ::= <source-name>
-//                    ::= <local-source-name> // GCC extension; see below.
-//                    ::= <unnamed-type-name>
-static bool ParseUnqualifiedName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  return (ParseOperatorName(state, nullptr) || ParseCtorDtorName(state) ||
-          ParseSourceName(state) || ParseLocalSourceName(state) ||
-          ParseUnnamedTypeName(state));
-}
-
-// <source-name> ::= <positive length number> <identifier>
-static bool ParseSourceName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  int length = -1;
-  if (ParseNumber(state, &length) && ParseIdentifier(state, length)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <local-source-name> ::= L <source-name> [<discriminator>]
-//
-// References:
-//   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31775
-//   https://gcc.gnu.org/viewcvs?view=rev&revision=124467
-static bool ParseLocalSourceName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'L') && ParseSourceName(state) &&
-      Optional(ParseDiscriminator(state))) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <unnamed-type-name> ::= Ut [<(nonnegative) number>] _
-//                     ::= <closure-type-name>
-// <closure-type-name> ::= Ul <lambda-sig> E [<(nonnegative) number>] _
-// <lambda-sig>        ::= <(parameter) type>+
-static bool ParseUnnamedTypeName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  // Type's 1-based index n is encoded as { "", n == 1; itoa(n-2), otherwise }.
-  // Optionally parse the encoded value into 'which' and add 2 to get the index.
-  int which = -1;
-
-  // Unnamed type local to function or class.
-  if (ParseTwoCharToken(state, "Ut") && Optional(ParseNumber(state, &which)) &&
-      which <= std::numeric_limits<int>::max() - 2 &&  // Don't overflow.
-      ParseOneCharToken(state, '_')) {
-    MaybeAppend(state, "{unnamed type#");
-    MaybeAppendDecimal(state, 2 + which);
-    MaybeAppend(state, "}");
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Closure type.
-  which = -1;
-  if (ParseTwoCharToken(state, "Ul") && DisableAppend(state) &&
-      OneOrMore(ParseType, state) && RestoreAppend(state, copy.append) &&
-      ParseOneCharToken(state, 'E') && Optional(ParseNumber(state, &which)) &&
-      which <= std::numeric_limits<int>::max() - 2 &&  // Don't overflow.
-      ParseOneCharToken(state, '_')) {
-    MaybeAppend(state, "{lambda()#");
-    MaybeAppendDecimal(state, 2 + which);
-    MaybeAppend(state, "}");
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <number> ::= [n] <non-negative decimal integer>
-// If "number_out" is non-null, then *number_out is set to the value of the
-// parsed number on success.
-static bool ParseNumber(State *state, int *number_out) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  bool negative = false;
-  if (ParseOneCharToken(state, 'n')) {
-    negative = true;
-  }
-  const char *p = RemainingInput(state);
-  uint64_t number = 0;
-  for (; *p != '\0'; ++p) {
-    if (IsDigit(*p)) {
-      number = number * 10 + (*p - '0');
-    } else {
-      break;
-    }
-  }
-  // Apply the sign with uint64_t arithmetic so overflows aren't UB.  Gives
-  // "incorrect" results for out-of-range inputs, but negative values only
-  // appear for literals, which aren't printed.
-  if (negative) {
-    number = ~number + 1;
-  }
-  if (p != RemainingInput(state)) {  // Conversion succeeded.
-    state->parse_state.mangled_idx += p - RemainingInput(state);
-    if (number_out != nullptr) {
-      // Note: possibly truncate "number".
-      *number_out = number;
-    }
-    return true;
-  }
-  return false;
-}
-
-// Floating-point literals are encoded using a fixed-length lowercase
-// hexadecimal string.
-static bool ParseFloatNumber(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  const char *p = RemainingInput(state);
-  for (; *p != '\0'; ++p) {
-    if (!IsDigit(*p) && !(*p >= 'a' && *p <= 'f')) {
-      break;
-    }
-  }
-  if (p != RemainingInput(state)) {  // Conversion succeeded.
-    state->parse_state.mangled_idx += p - RemainingInput(state);
-    return true;
-  }
-  return false;
-}
-
-// The <seq-id> is a sequence number in base 36,
-// using digits and upper case letters
-static bool ParseSeqId(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  const char *p = RemainingInput(state);
-  for (; *p != '\0'; ++p) {
-    if (!IsDigit(*p) && !(*p >= 'A' && *p <= 'Z')) {
-      break;
-    }
-  }
-  if (p != RemainingInput(state)) {  // Conversion succeeded.
-    state->parse_state.mangled_idx += p - RemainingInput(state);
-    return true;
-  }
-  return false;
-}
-
-// <identifier> ::= <unqualified source code identifier> (of given length)
-static bool ParseIdentifier(State *state, int length) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (length < 0 || !AtLeastNumCharsRemaining(RemainingInput(state), length)) {
-    return false;
-  }
-  if (IdentifierIsAnonymousNamespace(state, length)) {
-    MaybeAppend(state, "(anonymous namespace)");
-  } else {
-    MaybeAppendWithLength(state, RemainingInput(state), length);
-  }
-  state->parse_state.mangled_idx += length;
-  return true;
-}
-
-// <operator-name> ::= nw, and other two letters cases
-//                 ::= cv <type>  # (cast)
-//                 ::= v  <digit> <source-name> # vendor extended operator
-static bool ParseOperatorName(State *state, int *arity) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (!AtLeastNumCharsRemaining(RemainingInput(state), 2)) {
-    return false;
-  }
-  // First check with "cv" (cast) case.
-  ParseState copy = state->parse_state;
-  if (ParseTwoCharToken(state, "cv") && MaybeAppend(state, "operator ") &&
-      EnterNestedName(state) && ParseType(state) &&
-      LeaveNestedName(state, copy.nest_level)) {
-    if (arity != nullptr) {
-      *arity = 1;
-    }
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Then vendor extended operators.
-  if (ParseOneCharToken(state, 'v') && ParseDigit(state, arity) &&
-      ParseSourceName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Other operator names should start with a lower alphabet followed
-  // by a lower/upper alphabet.
-  if (!(IsLower(RemainingInput(state)[0]) &&
-        IsAlpha(RemainingInput(state)[1]))) {
-    return false;
-  }
-  // We may want to perform a binary search if we really need speed.
-  const AbbrevPair *p;
-  for (p = kOperatorList; p->abbrev != nullptr; ++p) {
-    if (RemainingInput(state)[0] == p->abbrev[0] &&
-        RemainingInput(state)[1] == p->abbrev[1]) {
-      if (arity != nullptr) {
-        *arity = p->arity;
-      }
-      MaybeAppend(state, "operator");
-      if (IsLower(*p->real_name)) {  // new, delete, etc.
-        MaybeAppend(state, " ");
-      }
-      MaybeAppend(state, p->real_name);
-      state->parse_state.mangled_idx += 2;
-      return true;
-    }
-  }
-  return false;
-}
-
-// <special-name> ::= TV <type>
-//                ::= TT <type>
-//                ::= TI <type>
-//                ::= TS <type>
-//                ::= TH <type>  # thread-local
-//                ::= Tc <call-offset> <call-offset> <(base) encoding>
-//                ::= GV <(object) name>
-//                ::= T <call-offset> <(base) encoding>
-// G++ extensions:
-//                ::= TC <type> <(offset) number> _ <(base) type>
-//                ::= TF <type>
-//                ::= TJ <type>
-//                ::= GR <name>
-//                ::= GA <encoding>
-//                ::= Th <call-offset> <(base) encoding>
-//                ::= Tv <call-offset> <(base) encoding>
-//
-// Note: we don't care much about them since they don't appear in
-// stack traces.  The are special data.
-static bool ParseSpecialName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "VTISH") &&
-      ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "Tc") && ParseCallOffset(state) &&
-      ParseCallOffset(state) && ParseEncoding(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "GV") && ParseName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'T') && ParseCallOffset(state) &&
-      ParseEncoding(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // G++ extensions
-  if (ParseTwoCharToken(state, "TC") && ParseType(state) &&
-      ParseNumber(state, nullptr) && ParseOneCharToken(state, '_') &&
-      DisableAppend(state) && ParseType(state)) {
-    RestoreAppend(state, copy.append);
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "FJ") &&
-      ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "GR") && ParseName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "GA") && ParseEncoding(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'T') && ParseCharClass(state, "hv") &&
-      ParseCallOffset(state) && ParseEncoding(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <call-offset> ::= h <nv-offset> _
-//               ::= v <v-offset> _
-static bool ParseCallOffset(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'h') && ParseNVOffset(state) &&
-      ParseOneCharToken(state, '_')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'v') && ParseVOffset(state) &&
-      ParseOneCharToken(state, '_')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <nv-offset> ::= <(offset) number>
-static bool ParseNVOffset(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  return ParseNumber(state, nullptr);
-}
-
-// <v-offset>  ::= <(offset) number> _ <(virtual offset) number>
-static bool ParseVOffset(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseNumber(state, nullptr) && ParseOneCharToken(state, '_') &&
-      ParseNumber(state, nullptr)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <ctor-dtor-name> ::= C1 | C2 | C3 | CI1 <base-class-type> | CI2
-// <base-class-type>
-//                  ::= D0 | D1 | D2
-// # GCC extensions: "unified" constructor/destructor.  See
-// #
-// https://github.com/gcc-mirror/gcc/blob/7ad17b583c3643bd4557f29b8391ca7ef08391f5/gcc/cp/mangle.c#L1847
-//                  ::= C4 | D4
-static bool ParseCtorDtorName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'C')) {
-    if (ParseCharClass(state, "1234")) {
-      const char *const prev_name =
-          state->out + state->parse_state.prev_name_idx;
-      MaybeAppendWithLength(state, prev_name,
-                            state->parse_state.prev_name_length);
-      return true;
-    } else if (ParseOneCharToken(state, 'I') && ParseCharClass(state, "12") &&
-               ParseClassEnumType(state)) {
-      return true;
-    }
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'D') && ParseCharClass(state, "0124")) {
-    const char *const prev_name = state->out + state->parse_state.prev_name_idx;
-    MaybeAppend(state, "~");
-    MaybeAppendWithLength(state, prev_name,
-                          state->parse_state.prev_name_length);
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <decltype> ::= Dt <expression> E  # decltype of an id-expression or class
-//                                   # member access (C++0x)
-//            ::= DT <expression> E  # decltype of an expression (C++0x)
-static bool ParseDecltype(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'D') && ParseCharClass(state, "tT") &&
-      ParseExpression(state) && ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <type> ::= <CV-qualifiers> <type>
-//        ::= P <type>   # pointer-to
-//        ::= R <type>   # reference-to
-//        ::= O <type>   # rvalue reference-to (C++0x)
-//        ::= C <type>   # complex pair (C 2000)
-//        ::= G <type>   # imaginary (C 2000)
-//        ::= U <source-name> <type>  # vendor extended type qualifier
-//        ::= <builtin-type>
-//        ::= <function-type>
-//        ::= <class-enum-type>  # note: just an alias for <name>
-//        ::= <array-type>
-//        ::= <pointer-to-member-type>
-//        ::= <template-template-param> <template-args>
-//        ::= <template-param>
-//        ::= <decltype>
-//        ::= <substitution>
-//        ::= Dp <type>          # pack expansion of (C++0x)
-//        ::= Dv <num-elems> _   # GNU vector extension
-//
-static bool ParseType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-
-  // We should check CV-qualifers, and PRGC things first.
-  //
-  // CV-qualifiers overlap with some operator names, but an operator name is not
-  // valid as a type.  To avoid an ambiguity that can lead to exponential time
-  // complexity, refuse to backtrack the CV-qualifiers.
-  //
-  // _Z4aoeuIrMvvE
-  //  => _Z 4aoeuI        rM  v     v   E
-  //         aoeu<operator%=, void, void>
-  //  => _Z 4aoeuI r Mv v              E
-  //         aoeu<void void::* restrict>
-  //
-  // By consuming the CV-qualifiers first, the former parse is disabled.
-  if (ParseCVQualifiers(state)) {
-    const bool result = ParseType(state);
-    if (!result) state->parse_state = copy;
-    return result;
-  }
-  state->parse_state = copy;
-
-  // Similarly, these tag characters can overlap with other <name>s resulting in
-  // two different parse prefixes that land on <template-args> in the same
-  // place, such as "C3r1xI...".  So, disable the "ctor-name = C3" parse by
-  // refusing to backtrack the tag characters.
-  if (ParseCharClass(state, "OPRCG")) {
-    const bool result = ParseType(state);
-    if (!result) state->parse_state = copy;
-    return result;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "Dp") && ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'U') && ParseSourceName(state) &&
-      ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseBuiltinType(state) || ParseFunctionType(state) ||
-      ParseClassEnumType(state) || ParseArrayType(state) ||
-      ParsePointerToMemberType(state) || ParseDecltype(state) ||
-      // "std" on its own isn't a type.
-      ParseSubstitution(state, /*accept_std=*/false)) {
-    return true;
-  }
-
-  if (ParseTemplateTemplateParam(state) && ParseTemplateArgs(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Less greedy than <template-template-param> <template-args>.
-  if (ParseTemplateParam(state)) {
-    return true;
-  }
-
-  if (ParseTwoCharToken(state, "Dv") && ParseNumber(state, nullptr) &&
-      ParseOneCharToken(state, '_')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <CV-qualifiers> ::= [r] [V] [K]
-// We don't allow empty <CV-qualifiers> to avoid infinite loop in
-// ParseType().
-static bool ParseCVQualifiers(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  int num_cv_qualifiers = 0;
-  num_cv_qualifiers += ParseOneCharToken(state, 'r');
-  num_cv_qualifiers += ParseOneCharToken(state, 'V');
-  num_cv_qualifiers += ParseOneCharToken(state, 'K');
-  return num_cv_qualifiers > 0;
-}
-
-// <builtin-type> ::= v, etc.  # single-character builtin types
-//                ::= u <source-name>
-//                ::= Dd, etc.  # two-character builtin types
-//
-// Not supported:
-//                ::= DF <number> _ # _FloatN (N bits)
-//
-static bool ParseBuiltinType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  const AbbrevPair *p;
-  for (p = kBuiltinTypeList; p->abbrev != nullptr; ++p) {
-    // Guaranteed only 1- or 2-character strings in kBuiltinTypeList.
-    if (p->abbrev[1] == '\0') {
-      if (ParseOneCharToken(state, p->abbrev[0])) {
-        MaybeAppend(state, p->real_name);
-        return true;
-      }
-    } else if (p->abbrev[2] == '\0' && ParseTwoCharToken(state, p->abbrev)) {
-      MaybeAppend(state, p->real_name);
-      return true;
-    }
-  }
-
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'u') && ParseSourceName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-//  <exception-spec> ::= Do                # non-throwing
-//                                           exception-specification (e.g.,
-//                                           noexcept, throw())
-//                   ::= DO <expression> E # computed (instantiation-dependent)
-//                                           noexcept
-//                   ::= Dw <type>+ E      # dynamic exception specification
-//                                           with instantiation-dependent types
-static bool ParseExceptionSpec(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-
-  if (ParseTwoCharToken(state, "Do")) return true;
-
-  ParseState copy = state->parse_state;
-  if (ParseTwoCharToken(state, "DO") && ParseExpression(state) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-  if (ParseTwoCharToken(state, "Dw") && OneOrMore(ParseType, state) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <function-type> ::= [exception-spec] F [Y] <bare-function-type> [O] E
-static bool ParseFunctionType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (Optional(ParseExceptionSpec(state)) && ParseOneCharToken(state, 'F') &&
-      Optional(ParseOneCharToken(state, 'Y')) && ParseBareFunctionType(state) &&
-      Optional(ParseOneCharToken(state, 'O')) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <bare-function-type> ::= <(signature) type>+
-static bool ParseBareFunctionType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  DisableAppend(state);
-  if (OneOrMore(ParseType, state)) {
-    RestoreAppend(state, copy.append);
-    MaybeAppend(state, "()");
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <class-enum-type> ::= <name>
-static bool ParseClassEnumType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  return ParseName(state);
-}
-
-// <array-type> ::= A <(positive dimension) number> _ <(element) type>
-//              ::= A [<(dimension) expression>] _ <(element) type>
-static bool ParseArrayType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'A') && ParseNumber(state, nullptr) &&
-      ParseOneCharToken(state, '_') && ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'A') && Optional(ParseExpression(state)) &&
-      ParseOneCharToken(state, '_') && ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <pointer-to-member-type> ::= M <(class) type> <(member) type>
-static bool ParsePointerToMemberType(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'M') && ParseType(state) && ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <template-param> ::= T_
-//                  ::= T <parameter-2 non-negative number> _
-static bool ParseTemplateParam(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (ParseTwoCharToken(state, "T_")) {
-    MaybeAppend(state, "?");  // We don't support template substitutions.
-    return true;
-  }
-
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'T') && ParseNumber(state, nullptr) &&
-      ParseOneCharToken(state, '_')) {
-    MaybeAppend(state, "?");  // We don't support template substitutions.
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <template-template-param> ::= <template-param>
-//                           ::= <substitution>
-static bool ParseTemplateTemplateParam(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  return (ParseTemplateParam(state) ||
-          // "std" on its own isn't a template.
-          ParseSubstitution(state, /*accept_std=*/false));
-}
-
-// <template-args> ::= I <template-arg>+ E
-static bool ParseTemplateArgs(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  DisableAppend(state);
-  if (ParseOneCharToken(state, 'I') && OneOrMore(ParseTemplateArg, state) &&
-      ParseOneCharToken(state, 'E')) {
-    RestoreAppend(state, copy.append);
-    MaybeAppend(state, "<>");
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <template-arg>  ::= <type>
-//                 ::= <expr-primary>
-//                 ::= J <template-arg>* E        # argument pack
-//                 ::= X <expression> E
-static bool ParseTemplateArg(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'J') && ZeroOrMore(ParseTemplateArg, state) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // There can be significant overlap between the following leading to
-  // exponential backtracking:
-  //
-  //   <expr-primary> ::= L <type> <expr-cast-value> E
-  //                 e.g. L 2xxIvE 1                 E
-  //   <type>         ==> <local-source-name> <template-args>
-  //                 e.g. L 2xx               IvE
-  //
-  // This means parsing an entire <type> twice, and <type> can contain
-  // <template-arg>, so this can generate exponential backtracking.  There is
-  // only overlap when the remaining input starts with "L <source-name>", so
-  // parse all cases that can start this way jointly to share the common prefix.
-  //
-  // We have:
-  //
-  //   <template-arg> ::= <type>
-  //                  ::= <expr-primary>
-  //
-  // First, drop all the productions of <type> that must start with something
-  // other than 'L'.  All that's left is <class-enum-type>; inline it.
-  //
-  //   <type> ::= <nested-name> # starts with 'N'
-  //          ::= <unscoped-name>
-  //          ::= <unscoped-template-name> <template-args>
-  //          ::= <local-name> # starts with 'Z'
-  //
-  // Drop and inline again:
-  //
-  //   <type> ::= <unscoped-name>
-  //          ::= <unscoped-name> <template-args>
-  //          ::= <substitution> <template-args> # starts with 'S'
-  //
-  // Merge the first two, inline <unscoped-name>, drop last:
-  //
-  //   <type> ::= <unqualified-name> [<template-args>]
-  //          ::= St <unqualified-name> [<template-args>] # starts with 'S'
-  //
-  // Drop and inline:
-  //
-  //   <type> ::= <operator-name> [<template-args>] # starts with lowercase
-  //          ::= <ctor-dtor-name> [<template-args>] # starts with 'C' or 'D'
-  //          ::= <source-name> [<template-args>] # starts with digit
-  //          ::= <local-source-name> [<template-args>]
-  //          ::= <unnamed-type-name> [<template-args>] # starts with 'U'
-  //
-  // One more time:
-  //
-  //   <type> ::= L <source-name> [<template-args>]
-  //
-  // Likewise with <expr-primary>:
-  //
-  //   <expr-primary> ::= L <type> <expr-cast-value> E
-  //                  ::= LZ <encoding> E # cannot overlap; drop
-  //                  ::= L <mangled_name> E # cannot overlap; drop
-  //
-  // By similar reasoning as shown above, the only <type>s starting with
-  // <source-name> are "<source-name> [<template-args>]".  Inline this.
-  //
-  //   <expr-primary> ::= L <source-name> [<template-args>] <expr-cast-value> E
-  //
-  // Now inline both of these into <template-arg>:
-  //
-  //   <template-arg> ::= L <source-name> [<template-args>]
-  //                  ::= L <source-name> [<template-args>] <expr-cast-value> E
-  //
-  // Merge them and we're done:
-  //   <template-arg>
-  //     ::= L <source-name> [<template-args>] [<expr-cast-value> E]
-  if (ParseLocalSourceName(state) && Optional(ParseTemplateArgs(state))) {
-    copy = state->parse_state;
-    if (ParseExprCastValue(state) && ParseOneCharToken(state, 'E')) {
-      return true;
-    }
-    state->parse_state = copy;
-    return true;
-  }
-
-  // Now that the overlapping cases can't reach this code, we can safely call
-  // both of these.
-  if (ParseType(state) || ParseExprPrimary(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'X') && ParseExpression(state) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <unresolved-type> ::= <template-param> [<template-args>]
-//                   ::= <decltype>
-//                   ::= <substitution>
-static inline bool ParseUnresolvedType(State *state) {
-  // No ComplexityGuard because we don't copy the state in this stack frame.
-  return (ParseTemplateParam(state) && Optional(ParseTemplateArgs(state))) ||
-         ParseDecltype(state) || ParseSubstitution(state, /*accept_std=*/false);
-}
-
-// <simple-id> ::= <source-name> [<template-args>]
-static inline bool ParseSimpleId(State *state) {
-  // No ComplexityGuard because we don't copy the state in this stack frame.
-
-  // Note: <simple-id> cannot be followed by a parameter pack; see comment in
-  // ParseUnresolvedType.
-  return ParseSourceName(state) && Optional(ParseTemplateArgs(state));
-}
-
-// <base-unresolved-name> ::= <source-name> [<template-args>]
-//                        ::= on <operator-name> [<template-args>]
-//                        ::= dn <destructor-name>
-static bool ParseBaseUnresolvedName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-
-  if (ParseSimpleId(state)) {
-    return true;
-  }
-
-  ParseState copy = state->parse_state;
-  if (ParseTwoCharToken(state, "on") && ParseOperatorName(state, nullptr) &&
-      Optional(ParseTemplateArgs(state))) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "dn") &&
-      (ParseUnresolvedType(state) || ParseSimpleId(state))) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <unresolved-name> ::= [gs] <base-unresolved-name>
-//                   ::= sr <unresolved-type> <base-unresolved-name>
-//                   ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
-//                         <base-unresolved-name>
-//                   ::= [gs] sr <unresolved-qualifier-level>+ E
-//                         <base-unresolved-name>
-static bool ParseUnresolvedName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-
-  ParseState copy = state->parse_state;
-  if (Optional(ParseTwoCharToken(state, "gs")) &&
-      ParseBaseUnresolvedName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "sr") && ParseUnresolvedType(state) &&
-      ParseBaseUnresolvedName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseTwoCharToken(state, "sr") && ParseOneCharToken(state, 'N') &&
-      ParseUnresolvedType(state) &&
-      OneOrMore(/* <unresolved-qualifier-level> ::= */ ParseSimpleId, state) &&
-      ParseOneCharToken(state, 'E') && ParseBaseUnresolvedName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (Optional(ParseTwoCharToken(state, "gs")) &&
-      ParseTwoCharToken(state, "sr") &&
-      OneOrMore(/* <unresolved-qualifier-level> ::= */ ParseSimpleId, state) &&
-      ParseOneCharToken(state, 'E') && ParseBaseUnresolvedName(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <expression> ::= <1-ary operator-name> <expression>
-//              ::= <2-ary operator-name> <expression> <expression>
-//              ::= <3-ary operator-name> <expression> <expression> <expression>
-//              ::= cl <expression>+ E
-//              ::= cv <type> <expression>      # type (expression)
-//              ::= cv <type> _ <expression>* E # type (expr-list)
-//              ::= st <type>
-//              ::= <template-param>
-//              ::= <function-param>
-//              ::= <expr-primary>
-//              ::= dt <expression> <unresolved-name> # expr.name
-//              ::= pt <expression> <unresolved-name> # expr->name
-//              ::= sp <expression>         # argument pack expansion
-//              ::= sr <type> <unqualified-name> <template-args>
-//              ::= sr <type> <unqualified-name>
-// <function-param> ::= fp <(top-level) CV-qualifiers> _
-//                  ::= fp <(top-level) CV-qualifiers> <number> _
-//                  ::= fL <number> p <(top-level) CV-qualifiers> _
-//                  ::= fL <number> p <(top-level) CV-qualifiers> <number> _
-static bool ParseExpression(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (ParseTemplateParam(state) || ParseExprPrimary(state)) {
-    return true;
-  }
-
-  // Object/function call expression.
-  ParseState copy = state->parse_state;
-  if (ParseTwoCharToken(state, "cl") && OneOrMore(ParseExpression, state) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Function-param expression (level 0).
-  if (ParseTwoCharToken(state, "fp") && Optional(ParseCVQualifiers(state)) &&
-      Optional(ParseNumber(state, nullptr)) && ParseOneCharToken(state, '_')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Function-param expression (level 1+).
-  if (ParseTwoCharToken(state, "fL") && Optional(ParseNumber(state, nullptr)) &&
-      ParseOneCharToken(state, 'p') && Optional(ParseCVQualifiers(state)) &&
-      Optional(ParseNumber(state, nullptr)) && ParseOneCharToken(state, '_')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Parse the conversion expressions jointly to avoid re-parsing the <type> in
-  // their common prefix.  Parsed as:
-  // <expression> ::= cv <type> <conversion-args>
-  // <conversion-args> ::= _ <expression>* E
-  //                   ::= <expression>
-  //
-  // Also don't try ParseOperatorName after seeing "cv", since ParseOperatorName
-  // also needs to accept "cv <type>" in other contexts.
-  if (ParseTwoCharToken(state, "cv")) {
-    if (ParseType(state)) {
-      ParseState copy2 = state->parse_state;
-      if (ParseOneCharToken(state, '_') && ZeroOrMore(ParseExpression, state) &&
-          ParseOneCharToken(state, 'E')) {
-        return true;
-      }
-      state->parse_state = copy2;
-      if (ParseExpression(state)) {
-        return true;
-      }
-    }
-  } else {
-    // Parse unary, binary, and ternary operator expressions jointly, taking
-    // care not to re-parse subexpressions repeatedly. Parse like:
-    //   <expression> ::= <operator-name> <expression>
-    //                    [<one-to-two-expressions>]
-    //   <one-to-two-expressions> ::= <expression> [<expression>]
-    int arity = -1;
-    if (ParseOperatorName(state, &arity) &&
-        arity > 0 &&  // 0 arity => disabled.
-        (arity < 3 || ParseExpression(state)) &&
-        (arity < 2 || ParseExpression(state)) &&
-        (arity < 1 || ParseExpression(state))) {
-      return true;
-    }
-  }
-  state->parse_state = copy;
-
-  // sizeof type
-  if (ParseTwoCharToken(state, "st") && ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Object and pointer member access expressions.
-  if ((ParseTwoCharToken(state, "dt") || ParseTwoCharToken(state, "pt")) &&
-      ParseExpression(state) && ParseType(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Pointer-to-member access expressions.  This parses the same as a binary
-  // operator, but it's implemented separately because "ds" shouldn't be
-  // accepted in other contexts that parse an operator name.
-  if (ParseTwoCharToken(state, "ds") && ParseExpression(state) &&
-      ParseExpression(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Parameter pack expansion
-  if (ParseTwoCharToken(state, "sp") && ParseExpression(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return ParseUnresolvedName(state);
-}
-
-// <expr-primary> ::= L <type> <(value) number> E
-//                ::= L <type> <(value) float> E
-//                ::= L <mangled-name> E
-//                // A bug in g++'s C++ ABI version 2 (-fabi-version=2).
-//                ::= LZ <encoding> E
-//
-// Warning, subtle: the "bug" LZ production above is ambiguous with the first
-// production where <type> starts with <local-name>, which can lead to
-// exponential backtracking in two scenarios:
-//
-// - When whatever follows the E in the <local-name> in the first production is
-//   not a name, we backtrack the whole <encoding> and re-parse the whole thing.
-//
-// - When whatever follows the <local-name> in the first production is not a
-//   number and this <expr-primary> may be followed by a name, we backtrack the
-//   <name> and re-parse it.
-//
-// Moreover this ambiguity isn't always resolved -- for example, the following
-// has two different parses:
-//
-//   _ZaaILZ4aoeuE1x1EvE
-//   => operator&&<aoeu, x, E, void>
-//   => operator&&<(aoeu::x)(1), void>
-//
-// To resolve this, we just do what GCC's demangler does, and refuse to parse
-// casts to <local-name> types.
-static bool ParseExprPrimary(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-
-  // The "LZ" special case: if we see LZ, we commit to accept "LZ <encoding> E"
-  // or fail, no backtracking.
-  if (ParseTwoCharToken(state, "LZ")) {
-    if (ParseEncoding(state) && ParseOneCharToken(state, 'E')) {
-      return true;
-    }
-
-    state->parse_state = copy;
-    return false;
-  }
-
-  // The merged cast production.
-  if (ParseOneCharToken(state, 'L') && ParseType(state) &&
-      ParseExprCastValue(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseOneCharToken(state, 'L') && ParseMangledName(state) &&
-      ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <number> or <float>, followed by 'E', as described above ParseExprPrimary.
-static bool ParseExprCastValue(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  // We have to be able to backtrack after accepting a number because we could
-  // have e.g. "7fffE", which will accept "7" as a number but then fail to find
-  // the 'E'.
-  ParseState copy = state->parse_state;
-  if (ParseNumber(state, nullptr) && ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  if (ParseFloatNumber(state) && ParseOneCharToken(state, 'E')) {
-    return true;
-  }
-  state->parse_state = copy;
-
-  return false;
-}
-
-// <local-name> ::= Z <(function) encoding> E <(entity) name> [<discriminator>]
-//              ::= Z <(function) encoding> E s [<discriminator>]
-//
-// Parsing a common prefix of these two productions together avoids an
-// exponential blowup of backtracking.  Parse like:
-//   <local-name> := Z <encoding> E <local-name-suffix>
-//   <local-name-suffix> ::= s [<discriminator>]
-//                       ::= <name> [<discriminator>]
-
-static bool ParseLocalNameSuffix(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-
-  if (MaybeAppend(state, "::") && ParseName(state) &&
-      Optional(ParseDiscriminator(state))) {
-    return true;
-  }
-
-  // Since we're not going to overwrite the above "::" by re-parsing the
-  // <encoding> (whose trailing '\0' byte was in the byte now holding the
-  // first ':'), we have to rollback the "::" if the <name> parse failed.
-  if (state->parse_state.append) {
-    state->out[state->parse_state.out_cur_idx - 2] = '\0';
-  }
-
-  return ParseOneCharToken(state, 's') && Optional(ParseDiscriminator(state));
-}
-
-static bool ParseLocalName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'Z') && ParseEncoding(state) &&
-      ParseOneCharToken(state, 'E') && ParseLocalNameSuffix(state)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <discriminator> := _ <(non-negative) number>
-static bool ParseDiscriminator(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, '_') && ParseNumber(state, nullptr)) {
-    return true;
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// <substitution> ::= S_
-//                ::= S <seq-id> _
-//                ::= St, etc.
-//
-// "St" is special in that it's not valid as a standalone name, and it *is*
-// allowed to precede a name without being wrapped in "N...E".  This means that
-// if we accept it on its own, we can accept "St1a" and try to parse
-// template-args, then fail and backtrack, accept "St" on its own, then "1a" as
-// an unqualified name and re-parse the same template-args.  To block this
-// exponential backtracking, we disable it with 'accept_std=false' in
-// problematic contexts.
-static bool ParseSubstitution(State *state, bool accept_std) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (ParseTwoCharToken(state, "S_")) {
-    MaybeAppend(state, "?");  // We don't support substitutions.
-    return true;
-  }
-
-  ParseState copy = state->parse_state;
-  if (ParseOneCharToken(state, 'S') && ParseSeqId(state) &&
-      ParseOneCharToken(state, '_')) {
-    MaybeAppend(state, "?");  // We don't support substitutions.
-    return true;
-  }
-  state->parse_state = copy;
-
-  // Expand abbreviations like "St" => "std".
-  if (ParseOneCharToken(state, 'S')) {
-    const AbbrevPair *p;
-    for (p = kSubstitutionList; p->abbrev != nullptr; ++p) {
-      if (RemainingInput(state)[0] == p->abbrev[1] &&
-          (accept_std || p->abbrev[1] != 't')) {
-        MaybeAppend(state, "std");
-        if (p->real_name[0] != '\0') {
-          MaybeAppend(state, "::");
-          MaybeAppend(state, p->real_name);
-        }
-        ++state->parse_state.mangled_idx;
-        return true;
-      }
-    }
-  }
-  state->parse_state = copy;
-  return false;
-}
-
-// Parse <mangled-name>, optionally followed by either a function-clone suffix
-// or version suffix.  Returns true only if all of "mangled_cur" was consumed.
-static bool ParseTopLevelMangledName(State *state) {
-  ComplexityGuard guard(state);
-  if (guard.IsTooComplex()) return false;
-  if (ParseMangledName(state)) {
-    if (RemainingInput(state)[0] != '\0') {
-      // Drop trailing function clone suffix, if any.
-      if (IsFunctionCloneSuffix(RemainingInput(state))) {
-        return true;
-      }
-      // Append trailing version suffix if any.
-      // ex. _Z3foo@@GLIBCXX_3.4
-      if (RemainingInput(state)[0] == '@') {
-        MaybeAppend(state, RemainingInput(state));
-        return true;
-      }
-      return false;  // Unconsumed suffix.
-    }
-    return true;
-  }
-  return false;
-}
-
-static bool Overflowed(const State *state) {
-  return state->parse_state.out_cur_idx >= state->out_end_idx;
-}
-
-// The demangler entry point.
-bool Demangle(const char *mangled, char *out, int out_size) {
-  State state;
-  InitState(&state, mangled, out, out_size);
-  return ParseTopLevelMangledName(&state) && !Overflowed(&state) &&
-         state.parse_state.out_cur_idx > 0;
-}
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/internal/demangle.h b/third_party/abseil/absl/debugging/internal/demangle.h
deleted file mode 100644
index c314d9b..0000000
--- a/third_party/abseil/absl/debugging/internal/demangle.h
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// An async-signal-safe and thread-safe demangler for Itanium C++ ABI
-// (aka G++ V3 ABI).
-//
-// The demangler is implemented to be used in async signal handlers to
-// symbolize stack traces.  We cannot use libstdc++'s
-// abi::__cxa_demangle() in such signal handlers since it's not async
-// signal safe (it uses malloc() internally).
-//
-// Note that this demangler doesn't support full demangling.  More
-// specifically, it doesn't print types of function parameters and
-// types of template arguments.  It just skips them.  However, it's
-// still very useful to extract basic information such as class,
-// function, constructor, destructor, and operator names.
-//
-// See the implementation note in demangle.cc if you are interested.
-//
-// Example:
-//
-// | Mangled Name  | The Demangler | abi::__cxa_demangle()
-// |---------------|---------------|-----------------------
-// | _Z1fv         | f()           | f()
-// | _Z1fi         | f()           | f(int)
-// | _Z3foo3bar    | foo()         | foo(bar)
-// | _Z1fIiEvi     | f<>()         | void f<int>(int)
-// | _ZN1N1fE      | N::f          | N::f
-// | _ZN3Foo3BarEv | Foo::Bar()    | Foo::Bar()
-// | _Zrm1XS_"     | operator%()   | operator%(X, X)
-// | _ZN3FooC1Ev   | Foo::Foo()    | Foo::Foo()
-// | _Z1fSs        | f()           | f(std::basic_string<char,
-// |               |               |   std::char_traits<char>,
-// |               |               |   std::allocator<char> >)
-//
-// See the unit test for more examples.
-//
-// Note: we might want to write demanglers for ABIs other than Itanium
-// C++ ABI in the future.
-//
-
-#ifndef ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
-#define ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Demangle `mangled`.  On success, return true and write the
-// demangled symbol name to `out`.  Otherwise, return false.
-// `out` is modified even if demangling is unsuccessful.
-bool Demangle(const char *mangled, char *out, int out_size);
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
diff --git a/third_party/abseil/absl/debugging/internal/demangle_test.cc b/third_party/abseil/absl/debugging/internal/demangle_test.cc
deleted file mode 100644
index 0bed735..0000000
--- a/third_party/abseil/absl/debugging/internal/demangle_test.cc
+++ /dev/null
@@ -1,197 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/debugging/internal/demangle.h"
-
-#include <cstdlib>
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/debugging/internal/stack_consumption.h"
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-namespace {
-
-// A wrapper function for Demangle() to make the unit test simple.
-static const char *DemangleIt(const char * const mangled) {
-  static char demangled[4096];
-  if (Demangle(mangled, demangled, sizeof(demangled))) {
-    return demangled;
-  } else {
-    return mangled;
-  }
-}
-
-// Test corner cases of bounary conditions.
-TEST(Demangle, CornerCases) {
-  char tmp[10];
-  EXPECT_TRUE(Demangle("_Z6foobarv", tmp, sizeof(tmp)));
-  // sizeof("foobar()") == 9
-  EXPECT_STREQ("foobar()", tmp);
-  EXPECT_TRUE(Demangle("_Z6foobarv", tmp, 9));
-  EXPECT_STREQ("foobar()", tmp);
-  EXPECT_FALSE(Demangle("_Z6foobarv", tmp, 8));  // Not enough.
-  EXPECT_FALSE(Demangle("_Z6foobarv", tmp, 1));
-  EXPECT_FALSE(Demangle("_Z6foobarv", tmp, 0));
-  EXPECT_FALSE(Demangle("_Z6foobarv", nullptr, 0));  // Should not cause SEGV.
-  EXPECT_FALSE(Demangle("_Z1000000", tmp, 9));
-}
-
-// Test handling of functions suffixed with .clone.N, which is used
-// by GCC 4.5.x (and our locally-modified version of GCC 4.4.x), and
-// .constprop.N and .isra.N, which are used by GCC 4.6.x.  These
-// suffixes are used to indicate functions which have been cloned
-// during optimization.  We ignore these suffixes.
-TEST(Demangle, Clones) {
-  char tmp[20];
-  EXPECT_TRUE(Demangle("_ZL3Foov", tmp, sizeof(tmp)));
-  EXPECT_STREQ("Foo()", tmp);
-  EXPECT_TRUE(Demangle("_ZL3Foov.clone.3", tmp, sizeof(tmp)));
-  EXPECT_STREQ("Foo()", tmp);
-  EXPECT_TRUE(Demangle("_ZL3Foov.constprop.80", tmp, sizeof(tmp)));
-  EXPECT_STREQ("Foo()", tmp);
-  EXPECT_TRUE(Demangle("_ZL3Foov.isra.18", tmp, sizeof(tmp)));
-  EXPECT_STREQ("Foo()", tmp);
-  EXPECT_TRUE(Demangle("_ZL3Foov.isra.2.constprop.18", tmp, sizeof(tmp)));
-  EXPECT_STREQ("Foo()", tmp);
-  // Invalid (truncated), should not demangle.
-  EXPECT_FALSE(Demangle("_ZL3Foov.clo", tmp, sizeof(tmp)));
-  // Invalid (.clone. not followed by number), should not demangle.
-  EXPECT_FALSE(Demangle("_ZL3Foov.clone.", tmp, sizeof(tmp)));
-  // Invalid (.clone. followed by non-number), should not demangle.
-  EXPECT_FALSE(Demangle("_ZL3Foov.clone.foo", tmp, sizeof(tmp)));
-  // Invalid (.constprop. not followed by number), should not demangle.
-  EXPECT_FALSE(Demangle("_ZL3Foov.isra.2.constprop.", tmp, sizeof(tmp)));
-}
-
-// Tests that verify that Demangle footprint is within some limit.
-// They are not to be run under sanitizers as the sanitizers increase
-// stack consumption by about 4x.
-#if defined(ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION) && \
-    !defined(ABSL_HAVE_ADDRESS_SANITIZER) &&                   \
-    !defined(ABSL_HAVE_MEMORY_SANITIZER) &&                    \
-    !defined(ABSL_HAVE_THREAD_SANITIZER)
-
-static const char *g_mangled;
-static char g_demangle_buffer[4096];
-static char *g_demangle_result;
-
-static void DemangleSignalHandler(int signo) {
-  if (Demangle(g_mangled, g_demangle_buffer, sizeof(g_demangle_buffer))) {
-    g_demangle_result = g_demangle_buffer;
-  } else {
-    g_demangle_result = nullptr;
-  }
-}
-
-// Call Demangle and figure out the stack footprint of this call.
-static const char *DemangleStackConsumption(const char *mangled,
-                                            int *stack_consumed) {
-  g_mangled = mangled;
-  *stack_consumed = GetSignalHandlerStackConsumption(DemangleSignalHandler);
-  ABSL_RAW_LOG(INFO, "Stack consumption of Demangle: %d", *stack_consumed);
-  return g_demangle_result;
-}
-
-// Demangle stack consumption should be within 8kB for simple mangled names
-// with some level of nesting. With alternate signal stack we have 64K,
-// but some signal handlers run on thread stack, and could have arbitrarily
-// little space left (so we don't want to make this number too large).
-const int kStackConsumptionUpperLimit = 8192;
-
-// Returns a mangled name nested to the given depth.
-static std::string NestedMangledName(int depth) {
-  std::string mangled_name = "_Z1a";
-  if (depth > 0) {
-    mangled_name += "IXL";
-    mangled_name += NestedMangledName(depth - 1);
-    mangled_name += "EEE";
-  }
-  return mangled_name;
-}
-
-TEST(Demangle, DemangleStackConsumption) {
-  // Measure stack consumption of Demangle for nested mangled names of varying
-  // depth.  Since Demangle is implemented as a recursive descent parser,
-  // stack consumption will grow as the nesting depth increases.  By measuring
-  // the stack consumption for increasing depths, we can see the growing
-  // impact of any stack-saving changes made to the code for Demangle.
-  int stack_consumed = 0;
-
-  const char *demangled =
-      DemangleStackConsumption("_Z6foobarv", &stack_consumed);
-  EXPECT_STREQ("foobar()", demangled);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, kStackConsumptionUpperLimit);
-
-  const std::string nested_mangled_name0 = NestedMangledName(0);
-  demangled = DemangleStackConsumption(nested_mangled_name0.c_str(),
-                                       &stack_consumed);
-  EXPECT_STREQ("a", demangled);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, kStackConsumptionUpperLimit);
-
-  const std::string nested_mangled_name1 = NestedMangledName(1);
-  demangled = DemangleStackConsumption(nested_mangled_name1.c_str(),
-                                       &stack_consumed);
-  EXPECT_STREQ("a<>", demangled);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, kStackConsumptionUpperLimit);
-
-  const std::string nested_mangled_name2 = NestedMangledName(2);
-  demangled = DemangleStackConsumption(nested_mangled_name2.c_str(),
-                                       &stack_consumed);
-  EXPECT_STREQ("a<>", demangled);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, kStackConsumptionUpperLimit);
-
-  const std::string nested_mangled_name3 = NestedMangledName(3);
-  demangled = DemangleStackConsumption(nested_mangled_name3.c_str(),
-                                       &stack_consumed);
-  EXPECT_STREQ("a<>", demangled);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, kStackConsumptionUpperLimit);
-}
-
-#endif  // Stack consumption tests
-
-static void TestOnInput(const char* input) {
-  static const int kOutSize = 1048576;
-  auto out = absl::make_unique<char[]>(kOutSize);
-  Demangle(input, out.get(), kOutSize);
-}
-
-TEST(DemangleRegression, NegativeLength) {
-  TestOnInput("_ZZn4");
-}
-
-TEST(DemangleRegression, DeeplyNestedArrayType) {
-  const int depth = 100000;
-  std::string data = "_ZStI";
-  data.reserve(data.size() + 3 * depth + 1);
-  for (int i = 0; i < depth; i++) {
-    data += "A1_";
-  }
-  TestOnInput(data.c_str());
-}
-
-}  // namespace
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/internal/elf_mem_image.cc b/third_party/abseil/absl/debugging/internal/elf_mem_image.cc
deleted file mode 100644
index 24cc013..0000000
--- a/third_party/abseil/absl/debugging/internal/elf_mem_image.cc
+++ /dev/null
@@ -1,382 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Allow dynamic symbol lookup in an in-memory Elf image.
-//
-
-#include "absl/debugging/internal/elf_mem_image.h"
-
-#ifdef ABSL_HAVE_ELF_MEM_IMAGE  // defined in elf_mem_image.h
-
-#include <string.h>
-#include <cassert>
-#include <cstddef>
-#include "absl/base/internal/raw_logging.h"
-
-// From binutils/include/elf/common.h (this doesn't appear to be documented
-// anywhere else).
-//
-//   /* This flag appears in a Versym structure.  It means that the symbol
-//      is hidden, and is only visible with an explicit version number.
-//      This is a GNU extension.  */
-//   #define VERSYM_HIDDEN           0x8000
-//
-//   /* This is the mask for the rest of the Versym information.  */
-//   #define VERSYM_VERSION          0x7fff
-
-#define VERSYM_VERSION 0x7fff
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-namespace {
-
-#if __WORDSIZE == 32
-const int kElfClass = ELFCLASS32;
-int ElfBind(const ElfW(Sym) *symbol) { return ELF32_ST_BIND(symbol->st_info); }
-int ElfType(const ElfW(Sym) *symbol) { return ELF32_ST_TYPE(symbol->st_info); }
-#elif __WORDSIZE == 64
-const int kElfClass = ELFCLASS64;
-int ElfBind(const ElfW(Sym) *symbol) { return ELF64_ST_BIND(symbol->st_info); }
-int ElfType(const ElfW(Sym) *symbol) { return ELF64_ST_TYPE(symbol->st_info); }
-#else
-const int kElfClass = -1;
-int ElfBind(const ElfW(Sym) *) {
-  ABSL_RAW_LOG(FATAL, "Unexpected word size");
-  return 0;
-}
-int ElfType(const ElfW(Sym) *) {
-  ABSL_RAW_LOG(FATAL, "Unexpected word size");
-  return 0;
-}
-#endif
-
-// Extract an element from one of the ELF tables, cast it to desired type.
-// This is just a simple arithmetic and a glorified cast.
-// Callers are responsible for bounds checking.
-template <typename T>
-const T *GetTableElement(const ElfW(Ehdr) * ehdr, ElfW(Off) table_offset,
-                         ElfW(Word) element_size, size_t index) {
-  return reinterpret_cast<const T*>(reinterpret_cast<const char *>(ehdr)
-                                    + table_offset
-                                    + index * element_size);
-}
-
-}  // namespace
-
-// The value of this variable doesn't matter; it's used only for its
-// unique address.
-const int ElfMemImage::kInvalidBaseSentinel = 0;
-
-ElfMemImage::ElfMemImage(const void *base) {
-  ABSL_RAW_CHECK(base != kInvalidBase, "bad pointer");
-  Init(base);
-}
-
-int ElfMemImage::GetNumSymbols() const {
-  if (!hash_) {
-    return 0;
-  }
-  // See http://www.caldera.com/developers/gabi/latest/ch5.dynamic.html#hash
-  return hash_[1];
-}
-
-const ElfW(Sym) *ElfMemImage::GetDynsym(int index) const {
-  ABSL_RAW_CHECK(index < GetNumSymbols(), "index out of range");
-  return dynsym_ + index;
-}
-
-const ElfW(Versym) *ElfMemImage::GetVersym(int index) const {
-  ABSL_RAW_CHECK(index < GetNumSymbols(), "index out of range");
-  return versym_ + index;
-}
-
-const ElfW(Phdr) *ElfMemImage::GetPhdr(int index) const {
-  ABSL_RAW_CHECK(index < ehdr_->e_phnum, "index out of range");
-  return GetTableElement<ElfW(Phdr)>(ehdr_,
-                                     ehdr_->e_phoff,
-                                     ehdr_->e_phentsize,
-                                     index);
-}
-
-const char *ElfMemImage::GetDynstr(ElfW(Word) offset) const {
-  ABSL_RAW_CHECK(offset < strsize_, "offset out of range");
-  return dynstr_ + offset;
-}
-
-const void *ElfMemImage::GetSymAddr(const ElfW(Sym) *sym) const {
-  if (sym->st_shndx == SHN_UNDEF || sym->st_shndx >= SHN_LORESERVE) {
-    // Symbol corresponds to "special" (e.g. SHN_ABS) section.
-    return reinterpret_cast<const void *>(sym->st_value);
-  }
-  ABSL_RAW_CHECK(link_base_ < sym->st_value, "symbol out of range");
-  return GetTableElement<char>(ehdr_, 0, 1, sym->st_value - link_base_);
-}
-
-const ElfW(Verdef) *ElfMemImage::GetVerdef(int index) const {
-  ABSL_RAW_CHECK(0 <= index && static_cast<size_t>(index) <= verdefnum_,
-                 "index out of range");
-  const ElfW(Verdef) *version_definition = verdef_;
-  while (version_definition->vd_ndx < index && version_definition->vd_next) {
-    const char *const version_definition_as_char =
-        reinterpret_cast<const char *>(version_definition);
-    version_definition =
-        reinterpret_cast<const ElfW(Verdef) *>(version_definition_as_char +
-                                               version_definition->vd_next);
-  }
-  return version_definition->vd_ndx == index ? version_definition : nullptr;
-}
-
-const ElfW(Verdaux) *ElfMemImage::GetVerdefAux(
-    const ElfW(Verdef) *verdef) const {
-  return reinterpret_cast<const ElfW(Verdaux) *>(verdef+1);
-}
-
-const char *ElfMemImage::GetVerstr(ElfW(Word) offset) const {
-  ABSL_RAW_CHECK(offset < strsize_, "offset out of range");
-  return dynstr_ + offset;
-}
-
-void ElfMemImage::Init(const void *base) {
-  ehdr_      = nullptr;
-  dynsym_    = nullptr;
-  dynstr_    = nullptr;
-  versym_    = nullptr;
-  verdef_    = nullptr;
-  hash_      = nullptr;
-  strsize_   = 0;
-  verdefnum_ = 0;
-  link_base_ = ~0L;  // Sentinel: PT_LOAD .p_vaddr can't possibly be this.
-  if (!base) {
-    return;
-  }
-  const char *const base_as_char = reinterpret_cast<const char *>(base);
-  if (base_as_char[EI_MAG0] != ELFMAG0 || base_as_char[EI_MAG1] != ELFMAG1 ||
-      base_as_char[EI_MAG2] != ELFMAG2 || base_as_char[EI_MAG3] != ELFMAG3) {
-    assert(false);
-    return;
-  }
-  int elf_class = base_as_char[EI_CLASS];
-  if (elf_class != kElfClass) {
-    assert(false);
-    return;
-  }
-  switch (base_as_char[EI_DATA]) {
-    case ELFDATA2LSB: {
-      if (__LITTLE_ENDIAN != __BYTE_ORDER) {
-        assert(false);
-        return;
-      }
-      break;
-    }
-    case ELFDATA2MSB: {
-      if (__BIG_ENDIAN != __BYTE_ORDER) {
-        assert(false);
-        return;
-      }
-      break;
-    }
-    default: {
-      assert(false);
-      return;
-    }
-  }
-
-  ehdr_ = reinterpret_cast<const ElfW(Ehdr) *>(base);
-  const ElfW(Phdr) *dynamic_program_header = nullptr;
-  for (int i = 0; i < ehdr_->e_phnum; ++i) {
-    const ElfW(Phdr) *const program_header = GetPhdr(i);
-    switch (program_header->p_type) {
-      case PT_LOAD:
-        if (!~link_base_) {
-          link_base_ = program_header->p_vaddr;
-        }
-        break;
-      case PT_DYNAMIC:
-        dynamic_program_header = program_header;
-        break;
-    }
-  }
-  if (!~link_base_ || !dynamic_program_header) {
-    assert(false);
-    // Mark this image as not present. Can not recur infinitely.
-    Init(nullptr);
-    return;
-  }
-  ptrdiff_t relocation =
-      base_as_char - reinterpret_cast<const char *>(link_base_);
-  ElfW(Dyn) *dynamic_entry =
-      reinterpret_cast<ElfW(Dyn) *>(dynamic_program_header->p_vaddr +
-                                    relocation);
-  for (; dynamic_entry->d_tag != DT_NULL; ++dynamic_entry) {
-    const ElfW(Xword) value = dynamic_entry->d_un.d_val + relocation;
-    switch (dynamic_entry->d_tag) {
-      case DT_HASH:
-        hash_ = reinterpret_cast<ElfW(Word) *>(value);
-        break;
-      case DT_SYMTAB:
-        dynsym_ = reinterpret_cast<ElfW(Sym) *>(value);
-        break;
-      case DT_STRTAB:
-        dynstr_ = reinterpret_cast<const char *>(value);
-        break;
-      case DT_VERSYM:
-        versym_ = reinterpret_cast<ElfW(Versym) *>(value);
-        break;
-      case DT_VERDEF:
-        verdef_ = reinterpret_cast<ElfW(Verdef) *>(value);
-        break;
-      case DT_VERDEFNUM:
-        verdefnum_ = dynamic_entry->d_un.d_val;
-        break;
-      case DT_STRSZ:
-        strsize_ = dynamic_entry->d_un.d_val;
-        break;
-      default:
-        // Unrecognized entries explicitly ignored.
-        break;
-    }
-  }
-  if (!hash_ || !dynsym_ || !dynstr_ || !versym_ ||
-      !verdef_ || !verdefnum_ || !strsize_) {
-    assert(false);  // invalid VDSO
-    // Mark this image as not present. Can not recur infinitely.
-    Init(nullptr);
-    return;
-  }
-}
-
-bool ElfMemImage::LookupSymbol(const char *name,
-                               const char *version,
-                               int type,
-                               SymbolInfo *info_out) const {
-  for (const SymbolInfo& info : *this) {
-    if (strcmp(info.name, name) == 0 && strcmp(info.version, version) == 0 &&
-        ElfType(info.symbol) == type) {
-      if (info_out) {
-        *info_out = info;
-      }
-      return true;
-    }
-  }
-  return false;
-}
-
-bool ElfMemImage::LookupSymbolByAddress(const void *address,
-                                        SymbolInfo *info_out) const {
-  for (const SymbolInfo& info : *this) {
-    const char *const symbol_start =
-        reinterpret_cast<const char *>(info.address);
-    const char *const symbol_end = symbol_start + info.symbol->st_size;
-    if (symbol_start <= address && address < symbol_end) {
-      if (info_out) {
-        // Client wants to know details for that symbol (the usual case).
-        if (ElfBind(info.symbol) == STB_GLOBAL) {
-          // Strong symbol; just return it.
-          *info_out = info;
-          return true;
-        } else {
-          // Weak or local. Record it, but keep looking for a strong one.
-          *info_out = info;
-        }
-      } else {
-        // Client only cares if there is an overlapping symbol.
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
-ElfMemImage::SymbolIterator::SymbolIterator(const void *const image, int index)
-    : index_(index), image_(image) {
-}
-
-const ElfMemImage::SymbolInfo *ElfMemImage::SymbolIterator::operator->() const {
-  return &info_;
-}
-
-const ElfMemImage::SymbolInfo& ElfMemImage::SymbolIterator::operator*() const {
-  return info_;
-}
-
-bool ElfMemImage::SymbolIterator::operator==(const SymbolIterator &rhs) const {
-  return this->image_ == rhs.image_ && this->index_ == rhs.index_;
-}
-
-bool ElfMemImage::SymbolIterator::operator!=(const SymbolIterator &rhs) const {
-  return !(*this == rhs);
-}
-
-ElfMemImage::SymbolIterator &ElfMemImage::SymbolIterator::operator++() {
-  this->Update(1);
-  return *this;
-}
-
-ElfMemImage::SymbolIterator ElfMemImage::begin() const {
-  SymbolIterator it(this, 0);
-  it.Update(0);
-  return it;
-}
-
-ElfMemImage::SymbolIterator ElfMemImage::end() const {
-  return SymbolIterator(this, GetNumSymbols());
-}
-
-void ElfMemImage::SymbolIterator::Update(int increment) {
-  const ElfMemImage *image = reinterpret_cast<const ElfMemImage *>(image_);
-  ABSL_RAW_CHECK(image->IsPresent() || increment == 0, "");
-  if (!image->IsPresent()) {
-    return;
-  }
-  index_ += increment;
-  if (index_ >= image->GetNumSymbols()) {
-    index_ = image->GetNumSymbols();
-    return;
-  }
-  const ElfW(Sym)    *symbol = image->GetDynsym(index_);
-  const ElfW(Versym) *version_symbol = image->GetVersym(index_);
-  ABSL_RAW_CHECK(symbol && version_symbol, "");
-  const char *const symbol_name = image->GetDynstr(symbol->st_name);
-  const ElfW(Versym) version_index = version_symbol[0] & VERSYM_VERSION;
-  const ElfW(Verdef) *version_definition = nullptr;
-  const char *version_name = "";
-  if (symbol->st_shndx == SHN_UNDEF) {
-    // Undefined symbols reference DT_VERNEED, not DT_VERDEF, and
-    // version_index could well be greater than verdefnum_, so calling
-    // GetVerdef(version_index) may trigger assertion.
-  } else {
-    version_definition = image->GetVerdef(version_index);
-  }
-  if (version_definition) {
-    // I am expecting 1 or 2 auxiliary entries: 1 for the version itself,
-    // optional 2nd if the version has a parent.
-    ABSL_RAW_CHECK(
-        version_definition->vd_cnt == 1 || version_definition->vd_cnt == 2,
-        "wrong number of entries");
-    const ElfW(Verdaux) *version_aux = image->GetVerdefAux(version_definition);
-    version_name = image->GetVerstr(version_aux->vda_name);
-  }
-  info_.name    = symbol_name;
-  info_.version = version_name;
-  info_.address = image->GetSymAddr(symbol);
-  info_.symbol  = symbol;
-}
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HAVE_ELF_MEM_IMAGE
diff --git a/third_party/abseil/absl/debugging/internal/elf_mem_image.h b/third_party/abseil/absl/debugging/internal/elf_mem_image.h
deleted file mode 100644
index 46bfade..0000000
--- a/third_party/abseil/absl/debugging/internal/elf_mem_image.h
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * Copyright 2017 The Abseil Authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// Allow dynamic symbol lookup for in-memory Elf images.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_ELF_MEM_IMAGE_H_
-#define ABSL_DEBUGGING_INTERNAL_ELF_MEM_IMAGE_H_
-
-// Including this will define the __GLIBC__ macro if glibc is being
-// used.
-#include <climits>
-
-#include "absl/base/config.h"
-
-// Maybe one day we can rewrite this file not to require the elf
-// symbol extensions in glibc, but for right now we need them.
-#ifdef ABSL_HAVE_ELF_MEM_IMAGE
-#error ABSL_HAVE_ELF_MEM_IMAGE cannot be directly set
-#endif
-
-#if defined(__ELF__) && defined(__GLIBC__) && !defined(__native_client__) && \
-    !defined(__asmjs__) && !defined(__wasm__)
-#define ABSL_HAVE_ELF_MEM_IMAGE 1
-#endif
-
-#ifdef ABSL_HAVE_ELF_MEM_IMAGE
-
-#include <link.h>  // for ElfW
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// An in-memory ELF image (may not exist on disk).
-class ElfMemImage {
- private:
-  // Sentinel: there could never be an elf image at &kInvalidBaseSentinel.
-  static const int kInvalidBaseSentinel;
-
- public:
-  // Sentinel: there could never be an elf image at this address.
-  static constexpr const void *const kInvalidBase =
-    static_cast<const void*>(&kInvalidBaseSentinel);
-
-  // Information about a single vdso symbol.
-  // All pointers are into .dynsym, .dynstr, or .text of the VDSO.
-  // Do not free() them or modify through them.
-  struct SymbolInfo {
-    const char      *name;      // E.g. "__vdso_getcpu"
-    const char      *version;   // E.g. "LINUX_2.6", could be ""
-                                // for unversioned symbol.
-    const void      *address;   // Relocated symbol address.
-    const ElfW(Sym) *symbol;    // Symbol in the dynamic symbol table.
-  };
-
-  // Supports iteration over all dynamic symbols.
-  class SymbolIterator {
-   public:
-    friend class ElfMemImage;
-    const SymbolInfo *operator->() const;
-    const SymbolInfo &operator*() const;
-    SymbolIterator& operator++();
-    bool operator!=(const SymbolIterator &rhs) const;
-    bool operator==(const SymbolIterator &rhs) const;
-   private:
-    SymbolIterator(const void *const image, int index);
-    void Update(int incr);
-    SymbolInfo info_;
-    int index_;
-    const void *const image_;
-  };
-
-
-  explicit ElfMemImage(const void *base);
-  void                 Init(const void *base);
-  bool                 IsPresent() const { return ehdr_ != nullptr; }
-  const ElfW(Phdr)*    GetPhdr(int index) const;
-  const ElfW(Sym)*     GetDynsym(int index) const;
-  const ElfW(Versym)*  GetVersym(int index) const;
-  const ElfW(Verdef)*  GetVerdef(int index) const;
-  const ElfW(Verdaux)* GetVerdefAux(const ElfW(Verdef) *verdef) const;
-  const char*          GetDynstr(ElfW(Word) offset) const;
-  const void*          GetSymAddr(const ElfW(Sym) *sym) const;
-  const char*          GetVerstr(ElfW(Word) offset) const;
-  int                  GetNumSymbols() const;
-
-  SymbolIterator begin() const;
-  SymbolIterator end() const;
-
-  // Look up versioned dynamic symbol in the image.
-  // Returns false if image is not present, or doesn't contain given
-  // symbol/version/type combination.
-  // If info_out is non-null, additional details are filled in.
-  bool LookupSymbol(const char *name, const char *version,
-                    int symbol_type, SymbolInfo *info_out) const;
-
-  // Find info about symbol (if any) which overlaps given address.
-  // Returns true if symbol was found; false if image isn't present
-  // or doesn't have a symbol overlapping given address.
-  // If info_out is non-null, additional details are filled in.
-  bool LookupSymbolByAddress(const void *address, SymbolInfo *info_out) const;
-
- private:
-  const ElfW(Ehdr) *ehdr_;
-  const ElfW(Sym) *dynsym_;
-  const ElfW(Versym) *versym_;
-  const ElfW(Verdef) *verdef_;
-  const ElfW(Word) *hash_;
-  const char *dynstr_;
-  size_t strsize_;
-  size_t verdefnum_;
-  ElfW(Addr) link_base_;     // Link-time base (p_vaddr of first PT_LOAD).
-};
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HAVE_ELF_MEM_IMAGE
-
-#endif  // ABSL_DEBUGGING_INTERNAL_ELF_MEM_IMAGE_H_
diff --git a/third_party/abseil/absl/debugging/internal/examine_stack.cc b/third_party/abseil/absl/debugging/internal/examine_stack.cc
deleted file mode 100644
index 6e5ff1f..0000000
--- a/third_party/abseil/absl/debugging/internal/examine_stack.cc
+++ /dev/null
@@ -1,187 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#include "absl/debugging/internal/examine_stack.h"
-
-#ifndef _WIN32
-#include <unistd.h>
-#endif
-
-#ifdef __APPLE__
-#include <sys/ucontext.h>
-#endif
-
-#include <csignal>
-#include <cstdio>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Returns the program counter from signal context, nullptr if
-// unknown. vuc is a ucontext_t*. We use void* to avoid the use of
-// ucontext_t on non-POSIX systems.
-void* GetProgramCounter(void* vuc) {
-#ifdef __linux__
-  if (vuc != nullptr) {
-    ucontext_t* context = reinterpret_cast<ucontext_t*>(vuc);
-#if defined(__aarch64__)
-    return reinterpret_cast<void*>(context->uc_mcontext.pc);
-#elif defined(__arm__)
-    return reinterpret_cast<void*>(context->uc_mcontext.arm_pc);
-#elif defined(__i386__)
-    if (14 < ABSL_ARRAYSIZE(context->uc_mcontext.gregs))
-      return reinterpret_cast<void*>(context->uc_mcontext.gregs[14]);
-#elif defined(__mips__)
-    return reinterpret_cast<void*>(context->uc_mcontext.pc);
-#elif defined(__powerpc64__)
-    return reinterpret_cast<void*>(context->uc_mcontext.gp_regs[32]);
-#elif defined(__powerpc__)
-    return reinterpret_cast<void*>(context->uc_mcontext.regs->nip);
-#elif defined(__riscv)
-    return reinterpret_cast<void*>(context->uc_mcontext.__gregs[REG_PC]);
-#elif defined(__s390__) && !defined(__s390x__)
-    return reinterpret_cast<void*>(context->uc_mcontext.psw.addr & 0x7fffffff);
-#elif defined(__s390__) && defined(__s390x__)
-    return reinterpret_cast<void*>(context->uc_mcontext.psw.addr);
-#elif defined(__x86_64__)
-    if (16 < ABSL_ARRAYSIZE(context->uc_mcontext.gregs))
-      return reinterpret_cast<void*>(context->uc_mcontext.gregs[16]);
-#else
-#error "Undefined Architecture."
-#endif
-  }
-#elif defined(__APPLE__)
-  if (vuc != nullptr) {
-    ucontext_t* signal_ucontext = reinterpret_cast<ucontext_t*>(vuc);
-#if defined(__aarch64__)
-    return reinterpret_cast<void*>(
-        __darwin_arm_thread_state64_get_pc(signal_ucontext->uc_mcontext->__ss));
-#elif defined(__arm__)
-#if __DARWIN_UNIX03
-    return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->__ss.__pc);
-#else
-    return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->ss.pc);
-#endif
-#elif defined(__i386__)
-#if __DARWIN_UNIX03
-    return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->__ss.__eip);
-#else
-    return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->ss.eip);
-#endif
-#elif defined(__x86_64__)
-#if __DARWIN_UNIX03
-    return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->__ss.__rip);
-#else
-    return reinterpret_cast<void*>(signal_ucontext->uc_mcontext->ss.rip);
-#endif
-#endif
-  }
-#elif defined(__akaros__)
-  auto* ctx = reinterpret_cast<struct user_context*>(vuc);
-  return reinterpret_cast<void*>(get_user_ctx_pc(ctx));
-#endif
-  static_cast<void>(vuc);
-  return nullptr;
-}
-
-// The %p field width for printf() functions is two characters per byte,
-// and two extra for the leading "0x".
-static constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
-
-// Print a program counter, its stack frame size, and its symbol name.
-// Note that there is a separate symbolize_pc argument. Return addresses may be
-// at the end of the function, and this allows the caller to back up from pc if
-// appropriate.
-static void DumpPCAndFrameSizeAndSymbol(void (*writerfn)(const char*, void*),
-                                        void* writerfn_arg, void* pc,
-                                        void* symbolize_pc, int framesize,
-                                        const char* const prefix) {
-  char tmp[1024];
-  const char* symbol = "(unknown)";
-  if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
-    symbol = tmp;
-  }
-  char buf[1024];
-  if (framesize <= 0) {
-    snprintf(buf, sizeof(buf), "%s@ %*p  (unknown)  %s\n", prefix,
-             kPrintfPointerFieldWidth, pc, symbol);
-  } else {
-    snprintf(buf, sizeof(buf), "%s@ %*p  %9d  %s\n", prefix,
-             kPrintfPointerFieldWidth, pc, framesize, symbol);
-  }
-  writerfn(buf, writerfn_arg);
-}
-
-// Print a program counter and the corresponding stack frame size.
-static void DumpPCAndFrameSize(void (*writerfn)(const char*, void*),
-                               void* writerfn_arg, void* pc, int framesize,
-                               const char* const prefix) {
-  char buf[100];
-  if (framesize <= 0) {
-    snprintf(buf, sizeof(buf), "%s@ %*p  (unknown)\n", prefix,
-             kPrintfPointerFieldWidth, pc);
-  } else {
-    snprintf(buf, sizeof(buf), "%s@ %*p  %9d\n", prefix,
-             kPrintfPointerFieldWidth, pc, framesize);
-  }
-  writerfn(buf, writerfn_arg);
-}
-
-void DumpPCAndFrameSizesAndStackTrace(
-    void* pc, void* const stack[], int frame_sizes[], int depth,
-    int min_dropped_frames, bool symbolize_stacktrace,
-    void (*writerfn)(const char*, void*), void* writerfn_arg) {
-  if (pc != nullptr) {
-    // We don't know the stack frame size for PC, use 0.
-    if (symbolize_stacktrace) {
-      DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, pc, pc, 0, "PC: ");
-    } else {
-      DumpPCAndFrameSize(writerfn, writerfn_arg, pc, 0, "PC: ");
-    }
-  }
-  for (int i = 0; i < depth; i++) {
-    if (symbolize_stacktrace) {
-      // Pass the previous address of pc as the symbol address because pc is a
-      // return address, and an overrun may occur when the function ends with a
-      // call to a function annotated noreturn (e.g. CHECK). Note that we don't
-      // do this for pc above, as the adjustment is only correct for return
-      // addresses.
-      DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, stack[i],
-                                  reinterpret_cast<char*>(stack[i]) - 1,
-                                  frame_sizes[i], "    ");
-    } else {
-      DumpPCAndFrameSize(writerfn, writerfn_arg, stack[i], frame_sizes[i],
-                         "    ");
-    }
-  }
-  if (min_dropped_frames > 0) {
-    char buf[100];
-    snprintf(buf, sizeof(buf), "    @ ... and at least %d more frames\n",
-             min_dropped_frames);
-    writerfn(buf, writerfn_arg);
-  }
-}
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/internal/examine_stack.h b/third_party/abseil/absl/debugging/internal/examine_stack.h
deleted file mode 100644
index 3933691..0000000
--- a/third_party/abseil/absl/debugging/internal/examine_stack.h
+++ /dev/null
@@ -1,42 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_DEBUGGING_INTERNAL_EXAMINE_STACK_H_
-#define ABSL_DEBUGGING_INTERNAL_EXAMINE_STACK_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Returns the program counter from signal context, or nullptr if
-// unknown. `vuc` is a ucontext_t*. We use void* to avoid the use of
-// ucontext_t on non-POSIX systems.
-void* GetProgramCounter(void* vuc);
-
-// Uses `writerfn` to dump the program counter, stack trace, and stack
-// frame sizes.
-void DumpPCAndFrameSizesAndStackTrace(
-    void* pc, void* const stack[], int frame_sizes[], int depth,
-    int min_dropped_frames, bool symbolize_stacktrace,
-    void (*writerfn)(const char*, void*), void* writerfn_arg);
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_EXAMINE_STACK_H_
diff --git a/third_party/abseil/absl/debugging/internal/stack_consumption.cc b/third_party/abseil/absl/debugging/internal/stack_consumption.cc
deleted file mode 100644
index e3dd51c..0000000
--- a/third_party/abseil/absl/debugging/internal/stack_consumption.cc
+++ /dev/null
@@ -1,185 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/debugging/internal/stack_consumption.h"
-
-#ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
-
-#include <signal.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <string.h>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-namespace {
-
-// This code requires that we know the direction in which the stack
-// grows. It is commonly believed that this can be detected by putting
-// a variable on the stack and then passing its address to a function
-// that compares the address of this variable to the address of a
-// variable on the function's own stack. However, this is unspecified
-// behavior in C++: If two pointers p and q of the same type point to
-// different objects that are not members of the same object or
-// elements of the same array or to different functions, or if only
-// one of them is null, the results of p<q, p>q, p<=q, and p>=q are
-// unspecified. Therefore, instead we hardcode the direction of the
-// stack on platforms we know about.
-#if defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || \
-    defined(__aarch64__)
-constexpr bool kStackGrowsDown = true;
-#else
-#error Need to define kStackGrowsDown
-#endif
-
-// To measure the stack footprint of some code, we create a signal handler
-// (for SIGUSR2 say) that exercises this code on an alternate stack. This
-// alternate stack is initialized to some known pattern (0x55, 0x55, 0x55,
-// ...). We then self-send this signal, and after the signal handler returns,
-// look at the alternate stack buffer to see what portion has been touched.
-//
-// This trick gives us the the stack footprint of the signal handler.  But the
-// signal handler, even before the code for it is exercised, consumes some
-// stack already. We however only want the stack usage of the code inside the
-// signal handler. To measure this accurately, we install two signal handlers:
-// one that does nothing and just returns, and the user-provided signal
-// handler. The difference between the stack consumption of these two signals
-// handlers should give us the stack foorprint of interest.
-
-void EmptySignalHandler(int) {}
-
-// This is arbitrary value, and could be increase further, at the cost of
-// memset()ting it all to known sentinel value.
-constexpr int kAlternateStackSize = 64 << 10;  // 64KiB
-
-constexpr int kSafetyMargin = 32;
-constexpr char kAlternateStackFillValue = 0x55;
-
-// These helper functions look at the alternate stack buffer, and figure
-// out what portion of this buffer has been touched - this is the stack
-// consumption of the signal handler running on this alternate stack.
-// This function will return -1 if the alternate stack buffer has not been
-// touched. It will abort the program if the buffer has overflowed or is about
-// to overflow.
-int GetStackConsumption(const void* const altstack) {
-  const char* begin;
-  int increment;
-  if (kStackGrowsDown) {
-    begin = reinterpret_cast<const char*>(altstack);
-    increment = 1;
-  } else {
-    begin = reinterpret_cast<const char*>(altstack) + kAlternateStackSize - 1;
-    increment = -1;
-  }
-
-  for (int usage_count = kAlternateStackSize; usage_count > 0; --usage_count) {
-    if (*begin != kAlternateStackFillValue) {
-      ABSL_RAW_CHECK(usage_count <= kAlternateStackSize - kSafetyMargin,
-                     "Buffer has overflowed or is about to overflow");
-      return usage_count;
-    }
-    begin += increment;
-  }
-
-  ABSL_RAW_LOG(FATAL, "Unreachable code");
-  return -1;
-}
-
-}  // namespace
-
-int GetSignalHandlerStackConsumption(void (*signal_handler)(int)) {
-  // The alt-signal-stack cannot be heap allocated because there is a
-  // bug in glibc-2.2 where some signal handler setup code looks at the
-  // current stack pointer to figure out what thread is currently running.
-  // Therefore, the alternate stack must be allocated from the main stack
-  // itself.
-  void* altstack = mmap(nullptr, kAlternateStackSize, PROT_READ | PROT_WRITE,
-                        MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-  ABSL_RAW_CHECK(altstack != MAP_FAILED, "mmap() failed");
-
-  // Set up the alt-signal-stack (and save the older one).
-  stack_t sigstk;
-  memset(&sigstk, 0, sizeof(sigstk));
-  sigstk.ss_sp = altstack;
-  sigstk.ss_size = kAlternateStackSize;
-  sigstk.ss_flags = 0;
-  stack_t old_sigstk;
-  memset(&old_sigstk, 0, sizeof(old_sigstk));
-  ABSL_RAW_CHECK(sigaltstack(&sigstk, &old_sigstk) == 0,
-                 "sigaltstack() failed");
-
-  // Set up SIGUSR1 and SIGUSR2 signal handlers (and save the older ones).
-  struct sigaction sa;
-  memset(&sa, 0, sizeof(sa));
-  struct sigaction old_sa1, old_sa2;
-  sigemptyset(&sa.sa_mask);
-  sa.sa_flags = SA_ONSTACK;
-
-  // SIGUSR1 maps to EmptySignalHandler.
-  sa.sa_handler = EmptySignalHandler;
-  ABSL_RAW_CHECK(sigaction(SIGUSR1, &sa, &old_sa1) == 0, "sigaction() failed");
-
-  // SIGUSR2 maps to signal_handler.
-  sa.sa_handler = signal_handler;
-  ABSL_RAW_CHECK(sigaction(SIGUSR2, &sa, &old_sa2) == 0, "sigaction() failed");
-
-  // Send SIGUSR1 signal and measure the stack consumption of the empty
-  // signal handler.
-  // The first signal might use more stack space. Run once and ignore the
-  // results to get that out of the way.
-  ABSL_RAW_CHECK(kill(getpid(), SIGUSR1) == 0, "kill() failed");
-
-  memset(altstack, kAlternateStackFillValue, kAlternateStackSize);
-  ABSL_RAW_CHECK(kill(getpid(), SIGUSR1) == 0, "kill() failed");
-  int base_stack_consumption = GetStackConsumption(altstack);
-
-  // Send SIGUSR2 signal and measure the stack consumption of signal_handler.
-  ABSL_RAW_CHECK(kill(getpid(), SIGUSR2) == 0, "kill() failed");
-  int signal_handler_stack_consumption = GetStackConsumption(altstack);
-
-  // Now restore the old alt-signal-stack and signal handlers.
-  if (old_sigstk.ss_sp == nullptr && old_sigstk.ss_size == 0 &&
-      (old_sigstk.ss_flags & SS_DISABLE)) {
-    // https://git.musl-libc.org/cgit/musl/commit/src/signal/sigaltstack.c?id=7829f42a2c8944555439380498ab8b924d0f2070
-    // The original stack has ss_size==0 and ss_flags==SS_DISABLE, but some
-    // versions of musl have a bug that rejects ss_size==0. Work around this by
-    // setting ss_size to MINSIGSTKSZ, which should be ignored by the kernel
-    // when SS_DISABLE is set.
-    old_sigstk.ss_size = MINSIGSTKSZ;
-  }
-  ABSL_RAW_CHECK(sigaltstack(&old_sigstk, nullptr) == 0,
-                 "sigaltstack() failed");
-  ABSL_RAW_CHECK(sigaction(SIGUSR1, &old_sa1, nullptr) == 0,
-                 "sigaction() failed");
-  ABSL_RAW_CHECK(sigaction(SIGUSR2, &old_sa2, nullptr) == 0,
-                 "sigaction() failed");
-
-  ABSL_RAW_CHECK(munmap(altstack, kAlternateStackSize) == 0, "munmap() failed");
-  if (signal_handler_stack_consumption != -1 && base_stack_consumption != -1) {
-    return signal_handler_stack_consumption - base_stack_consumption;
-  }
-  return -1;
-}
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
diff --git a/third_party/abseil/absl/debugging/internal/stack_consumption.h b/third_party/abseil/absl/debugging/internal/stack_consumption.h
deleted file mode 100644
index 2b5e715..0000000
--- a/third_party/abseil/absl/debugging/internal/stack_consumption.h
+++ /dev/null
@@ -1,50 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Helper function for measuring stack consumption of signal handlers.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACK_CONSUMPTION_H_
-#define ABSL_DEBUGGING_INTERNAL_STACK_CONSUMPTION_H_
-
-#include "absl/base/config.h"
-
-// The code in this module is not portable.
-// Use this feature test macro to detect its availability.
-#ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
-#error ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION cannot be set directly
-#elif !defined(__APPLE__) && !defined(_WIN32) &&                     \
-    (defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || \
-     defined(__aarch64__))
-#define ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION 1
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Returns the stack consumption in bytes for the code exercised by
-// signal_handler.  To measure stack consumption, signal_handler is registered
-// as a signal handler, so the code that it exercises must be async-signal
-// safe.  The argument of signal_handler is an implementation detail of signal
-// handlers and should ignored by the code for signal_handler.  Use global
-// variables to pass information between your test code and signal_handler.
-int GetSignalHandlerStackConsumption(void (*signal_handler)(int));
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACK_CONSUMPTION_H_
diff --git a/third_party/abseil/absl/debugging/internal/stack_consumption_test.cc b/third_party/abseil/absl/debugging/internal/stack_consumption_test.cc
deleted file mode 100644
index 80445bf..0000000
--- a/third_party/abseil/absl/debugging/internal/stack_consumption_test.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/debugging/internal/stack_consumption.h"
-
-#ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
-
-#include <string.h>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-namespace {
-
-static void SimpleSignalHandler(int signo) {
-  char buf[100];
-  memset(buf, 'a', sizeof(buf));
-
-  // Never true, but prevents compiler from optimizing buf out.
-  if (signo == 0) {
-    ABSL_RAW_LOG(INFO, "%p", static_cast<void*>(buf));
-  }
-}
-
-TEST(SignalHandlerStackConsumptionTest, MeasuresStackConsumption) {
-  // Our handler should consume reasonable number of bytes.
-  EXPECT_GE(GetSignalHandlerStackConsumption(SimpleSignalHandler), 100);
-}
-
-}  // namespace
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_aarch64-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_aarch64-inl.inc
deleted file mode 100644
index f4859d7..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_aarch64-inl.inc
+++ /dev/null
@@ -1,199 +0,0 @@
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_AARCH64_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_AARCH64_INL_H_
-
-// Generate stack tracer for aarch64
-
-#if defined(__linux__)
-#include <sys/mman.h>
-#include <ucontext.h>
-#include <unistd.h>
-#endif
-
-#include <atomic>
-#include <cassert>
-#include <cstdint>
-#include <iostream>
-
-#include "absl/base/attributes.h"
-#include "absl/debugging/internal/address_is_readable.h"
-#include "absl/debugging/internal/vdso_support.h"  // a no-op on non-elf or non-glibc systems
-#include "absl/debugging/stacktrace.h"
-
-static const uintptr_t kUnknownFrameSize = 0;
-
-#if defined(__linux__)
-// Returns the address of the VDSO __kernel_rt_sigreturn function, if present.
-static const unsigned char* GetKernelRtSigreturnAddress() {
-  constexpr uintptr_t kImpossibleAddress = 1;
-  ABSL_CONST_INIT static std::atomic<uintptr_t> memoized{kImpossibleAddress};
-  uintptr_t address = memoized.load(std::memory_order_relaxed);
-  if (address != kImpossibleAddress) {
-    return reinterpret_cast<const unsigned char*>(address);
-  }
-
-  address = reinterpret_cast<uintptr_t>(nullptr);
-
-#ifdef ABSL_HAVE_VDSO_SUPPORT
-  absl::debugging_internal::VDSOSupport vdso;
-  if (vdso.IsPresent()) {
-    absl::debugging_internal::VDSOSupport::SymbolInfo symbol_info;
-    auto lookup = [&](int type) {
-      return vdso.LookupSymbol("__kernel_rt_sigreturn", "LINUX_2.6.39", type,
-                               &symbol_info);
-    };
-    if ((!lookup(STT_FUNC) && !lookup(STT_NOTYPE)) ||
-        symbol_info.address == nullptr) {
-      // Unexpected: VDSO is present, yet the expected symbol is missing
-      // or null.
-      assert(false && "VDSO is present, but doesn't have expected symbol");
-    } else {
-      if (reinterpret_cast<uintptr_t>(symbol_info.address) !=
-          kImpossibleAddress) {
-        address = reinterpret_cast<uintptr_t>(symbol_info.address);
-      } else {
-        assert(false && "VDSO returned invalid address");
-      }
-    }
-  }
-#endif
-
-  memoized.store(address, std::memory_order_relaxed);
-  return reinterpret_cast<const unsigned char*>(address);
-}
-#endif  // __linux__
-
-// Compute the size of a stack frame in [low..high).  We assume that
-// low < high.  Return size of kUnknownFrameSize.
-template<typename T>
-static inline uintptr_t ComputeStackFrameSize(const T* low,
-                                              const T* high) {
-  const char* low_char_ptr = reinterpret_cast<const char *>(low);
-  const char* high_char_ptr = reinterpret_cast<const char *>(high);
-  return low < high ? high_char_ptr - low_char_ptr : kUnknownFrameSize;
-}
-
-// Given a pointer to a stack frame, locate and return the calling
-// stackframe, or return null if no stackframe can be found. Perform sanity
-// checks (the strictness of which is controlled by the boolean parameter
-// "STRICT_UNWINDING") to reduce the chance that a bad pointer is returned.
-template<bool STRICT_UNWINDING, bool WITH_CONTEXT>
-ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-static void **NextStackFrame(void **old_frame_pointer, const void *uc) {
-  void **new_frame_pointer = reinterpret_cast<void**>(*old_frame_pointer);
-  bool check_frame_size = true;
-
-#if defined(__linux__)
-  if (WITH_CONTEXT && uc != nullptr) {
-    // Check to see if next frame's return address is __kernel_rt_sigreturn.
-    if (old_frame_pointer[1] == GetKernelRtSigreturnAddress()) {
-      const ucontext_t *ucv = static_cast<const ucontext_t *>(uc);
-      // old_frame_pointer[0] is not suitable for unwinding, look at
-      // ucontext to discover frame pointer before signal.
-      void **const pre_signal_frame_pointer =
-          reinterpret_cast<void **>(ucv->uc_mcontext.regs[29]);
-
-      // Check that alleged frame pointer is actually readable. This is to
-      // prevent "double fault" in case we hit the first fault due to e.g.
-      // stack corruption.
-      if (!absl::debugging_internal::AddressIsReadable(
-              pre_signal_frame_pointer))
-        return nullptr;
-
-      // Alleged frame pointer is readable, use it for further unwinding.
-      new_frame_pointer = pre_signal_frame_pointer;
-
-      // Skip frame size check if we return from a signal. We may be using a
-      // an alternate stack for signals.
-      check_frame_size = false;
-    }
-  }
-#endif
-
-  // aarch64 ABI requires stack pointer to be 16-byte-aligned.
-  if ((reinterpret_cast<uintptr_t>(new_frame_pointer) & 15) != 0)
-    return nullptr;
-
-  // Check frame size.  In strict mode, we assume frames to be under
-  // 100,000 bytes.  In non-strict mode, we relax the limit to 1MB.
-  if (check_frame_size) {
-    const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
-    const uintptr_t frame_size =
-        ComputeStackFrameSize(old_frame_pointer, new_frame_pointer);
-    if (frame_size == kUnknownFrameSize || frame_size > max_size)
-      return nullptr;
-  }
-
-  return new_frame_pointer;
-}
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
-                      const void *ucp, int *min_dropped_frames) {
-#ifdef __GNUC__
-  void **frame_pointer = reinterpret_cast<void**>(__builtin_frame_address(0));
-#else
-# error reading stack point not yet supported on this platform.
-#endif
-
-  skip_count++;    // Skip the frame for this function.
-  int n = 0;
-
-  // The frame pointer points to low address of a frame.  The first 64-bit
-  // word of a frame points to the next frame up the call chain, which normally
-  // is just after the high address of the current frame.  The second word of
-  // a frame contains return adress of to the caller.   To find a pc value
-  // associated with the current frame, we need to go down a level in the call
-  // chain.  So we remember return the address of the last frame seen.  This
-  // does not work for the first stack frame, which belongs to UnwindImp() but
-  // we skip the frame for UnwindImp() anyway.
-  void* prev_return_address = nullptr;
-
-  while (frame_pointer && n < max_depth) {
-    // The absl::GetStackFrames routine is called when we are in some
-    // informational context (the failure signal handler for example).
-    // Use the non-strict unwinding rules to produce a stack trace
-    // that is as complete as possible (even if it contains a few bogus
-    // entries in some rare cases).
-    void **next_frame_pointer =
-        NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
-
-    if (skip_count > 0) {
-      skip_count--;
-    } else {
-      result[n] = prev_return_address;
-      if (IS_STACK_FRAMES) {
-        sizes[n] = ComputeStackFrameSize(frame_pointer, next_frame_pointer);
-      }
-      n++;
-    }
-    prev_return_address = frame_pointer[1];
-    frame_pointer = next_frame_pointer;
-  }
-  if (min_dropped_frames != nullptr) {
-    // Implementation detail: we clamp the max of frames we are willing to
-    // count, so as not to spend too much time in the loop below.
-    const int kMaxUnwind = 200;
-    int j = 0;
-    for (; frame_pointer != nullptr && j < kMaxUnwind; j++) {
-      frame_pointer =
-          NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
-    }
-    *min_dropped_frames = j;
-  }
-  return n;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return true;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_AARCH64_INL_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_arm-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_arm-inl.inc
deleted file mode 100644
index 2a1bf2e..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_arm-inl.inc
+++ /dev/null
@@ -1,134 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This is inspired by Craig Silverstein's PowerPC stacktrace code.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_ARM_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_ARM_INL_H_
-
-#include <cstdint>
-
-#include "absl/debugging/stacktrace.h"
-
-// WARNING:
-// This only works if all your code is in either ARM or THUMB mode.  With
-// interworking, the frame pointer of the caller can either be in r11 (ARM
-// mode) or r7 (THUMB mode).  A callee only saves the frame pointer of its
-// mode in a fixed location on its stack frame.  If the caller is a different
-// mode, there is no easy way to find the frame pointer.  It can either be
-// still in the designated register or saved on stack along with other callee
-// saved registers.
-
-// Given a pointer to a stack frame, locate and return the calling
-// stackframe, or return nullptr if no stackframe can be found. Perform sanity
-// checks (the strictness of which is controlled by the boolean parameter
-// "STRICT_UNWINDING") to reduce the chance that a bad pointer is returned.
-template<bool STRICT_UNWINDING>
-static void **NextStackFrame(void **old_sp) {
-  void **new_sp = (void**) old_sp[-1];
-
-  // Check that the transition from frame pointer old_sp to frame
-  // pointer new_sp isn't clearly bogus
-  if (STRICT_UNWINDING) {
-    // With the stack growing downwards, older stack frame must be
-    // at a greater address that the current one.
-    if (new_sp <= old_sp) return nullptr;
-    // Assume stack frames larger than 100,000 bytes are bogus.
-    if ((uintptr_t)new_sp - (uintptr_t)old_sp > 100000) return nullptr;
-  } else {
-    // In the non-strict mode, allow discontiguous stack frames.
-    // (alternate-signal-stacks for example).
-    if (new_sp == old_sp) return nullptr;
-    // And allow frames upto about 1MB.
-    if ((new_sp > old_sp)
-        && ((uintptr_t)new_sp - (uintptr_t)old_sp > 1000000)) return nullptr;
-  }
-  if ((uintptr_t)new_sp & (sizeof(void *) - 1)) return nullptr;
-  return new_sp;
-}
-
-// This ensures that absl::GetStackTrace sets up the Link Register properly.
-#ifdef __GNUC__
-void StacktraceArmDummyFunction() __attribute__((noinline));
-void StacktraceArmDummyFunction() { __asm__ volatile(""); }
-#else
-# error StacktraceArmDummyFunction() needs to be ported to this platform.
-#endif
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
-                      const void * /* ucp */, int *min_dropped_frames) {
-#ifdef __GNUC__
-  void **sp = reinterpret_cast<void**>(__builtin_frame_address(0));
-#else
-# error reading stack point not yet supported on this platform.
-#endif
-
-  // On ARM, the return address is stored in the link register (r14).
-  // This is not saved on the stack frame of a leaf function.  To
-  // simplify code that reads return addresses, we call a dummy
-  // function so that the return address of this function is also
-  // stored in the stack frame.  This works at least for gcc.
-  StacktraceArmDummyFunction();
-
-  int n = 0;
-  while (sp && n < max_depth) {
-    // The absl::GetStackFrames routine is called when we are in some
-    // informational context (the failure signal handler for example).
-    // Use the non-strict unwinding rules to produce a stack trace
-    // that is as complete as possible (even if it contains a few bogus
-    // entries in some rare cases).
-    void **next_sp = NextStackFrame<!IS_STACK_FRAMES>(sp);
-
-    if (skip_count > 0) {
-      skip_count--;
-    } else {
-      result[n] = *sp;
-
-      if (IS_STACK_FRAMES) {
-        if (next_sp > sp) {
-          sizes[n] = (uintptr_t)next_sp - (uintptr_t)sp;
-        } else {
-          // A frame-size of 0 is used to indicate unknown frame size.
-          sizes[n] = 0;
-        }
-      }
-      n++;
-    }
-    sp = next_sp;
-  }
-  if (min_dropped_frames != nullptr) {
-    // Implementation detail: we clamp the max of frames we are willing to
-    // count, so as not to spend too much time in the loop below.
-    const int kMaxUnwind = 200;
-    int j = 0;
-    for (; sp != nullptr && j < kMaxUnwind; j++) {
-      sp = NextStackFrame<!IS_STACK_FRAMES>(sp);
-    }
-    *min_dropped_frames = j;
-  }
-  return n;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return false;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_ARM_INL_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_config.h b/third_party/abseil/absl/debugging/internal/stacktrace_config.h
deleted file mode 100644
index cca410d..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_config.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright 2017 The Abseil Authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
-
- * Defines ABSL_STACKTRACE_INL_HEADER to the *-inl.h containing
- * actual unwinder implementation.
- * This header is "private" to stacktrace.cc.
- * DO NOT include it into any other files.
-*/
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_CONFIG_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_CONFIG_H_
-
-#include "absl/base/config.h"
-
-#if defined(ABSL_STACKTRACE_INL_HEADER)
-#error ABSL_STACKTRACE_INL_HEADER cannot be directly set
-
-#elif defined(_WIN32)
-#define ABSL_STACKTRACE_INL_HEADER \
-    "absl/debugging/internal/stacktrace_win32-inl.inc"
-
-#elif defined(__APPLE__)
-#ifdef ABSL_HAVE_THREAD_LOCAL
-// Thread local support required for UnwindImpl.
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_generic-inl.inc"
-#endif
-
-#elif defined(__linux__) && !defined(__ANDROID__)
-
-#if defined(NO_FRAME_POINTER) && \
-    (defined(__i386__) || defined(__x86_64__) || defined(__aarch64__))
-// Note: The libunwind-based implementation is not available to open-source
-// users.
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_libunwind-inl.inc"
-#define STACKTRACE_USES_LIBUNWIND 1
-#elif defined(NO_FRAME_POINTER) && defined(__has_include)
-#if __has_include(<execinfo.h>)
-// Note: When using glibc this may require -funwind-tables to function properly.
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_generic-inl.inc"
-#endif
-#elif defined(__i386__) || defined(__x86_64__)
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_x86-inl.inc"
-#elif defined(__ppc__) || defined(__PPC__)
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_powerpc-inl.inc"
-#elif defined(__aarch64__)
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_aarch64-inl.inc"
-#elif defined(__has_include)
-#if __has_include(<execinfo.h>)
-// Note: When using glibc this may require -funwind-tables to function properly.
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_generic-inl.inc"
-#endif
-#endif
-
-#endif
-
-// Fallback to the empty implementation.
-#if !defined(ABSL_STACKTRACE_INL_HEADER)
-#define ABSL_STACKTRACE_INL_HEADER \
-  "absl/debugging/internal/stacktrace_unimplemented-inl.inc"
-#endif
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_CONFIG_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_generic-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_generic-inl.inc
deleted file mode 100644
index b2792a1..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_generic-inl.inc
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Portable implementation - just use glibc
-//
-// Note:  The glibc implementation may cause a call to malloc.
-// This can cause a deadlock in HeapProfiler.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_GENERIC_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_GENERIC_INL_H_
-
-#include <execinfo.h>
-#include <atomic>
-#include <cstring>
-
-#include "absl/debugging/stacktrace.h"
-#include "absl/base/attributes.h"
-
-// Sometimes, we can try to get a stack trace from within a stack
-// trace, because we don't block signals inside this code (which would be too
-// expensive: the two extra system calls per stack trace do matter here).
-// That can cause a self-deadlock.
-// Protect against such reentrant call by failing to get a stack trace.
-//
-// We use __thread here because the code here is extremely low level -- it is
-// called while collecting stack traces from within malloc and mmap, and thus
-// can not call anything which might call malloc or mmap itself.
-static __thread int recursive = 0;
-
-// The stack trace function might be invoked very early in the program's
-// execution (e.g. from the very first malloc if using tcmalloc). Also, the
-// glibc implementation itself will trigger malloc the first time it is called.
-// As such, we suppress usage of backtrace during this early stage of execution.
-static std::atomic<bool> disable_stacktraces(true);  // Disabled until healthy.
-// Waiting until static initializers run seems to be late enough.
-// This file is included into stacktrace.cc so this will only run once.
-ABSL_ATTRIBUTE_UNUSED static int stacktraces_enabler = []() {
-  void* unused_stack[1];
-  // Force the first backtrace to happen early to get the one-time shared lib
-  // loading (allocation) out of the way. After the first call it is much safer
-  // to use backtrace from a signal handler if we crash somewhere later.
-  backtrace(unused_stack, 1);
-  disable_stacktraces.store(false, std::memory_order_relaxed);
-  return 0;
-}();
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
-                      const void *ucp, int *min_dropped_frames) {
-  if (recursive || disable_stacktraces.load(std::memory_order_relaxed)) {
-    return 0;
-  }
-  ++recursive;
-
-  static_cast<void>(ucp);  // Unused.
-  static const int kStackLength = 64;
-  void * stack[kStackLength];
-  int size;
-
-  size = backtrace(stack, kStackLength);
-  skip_count++;  // we want to skip the current frame as well
-  int result_count = size - skip_count;
-  if (result_count < 0)
-    result_count = 0;
-  if (result_count > max_depth)
-    result_count = max_depth;
-  for (int i = 0; i < result_count; i++)
-    result[i] = stack[i + skip_count];
-
-  if (IS_STACK_FRAMES) {
-    // No implementation for finding out the stack frame sizes yet.
-    memset(sizes, 0, sizeof(*sizes) * result_count);
-  }
-  if (min_dropped_frames != nullptr) {
-    if (size - skip_count - max_depth > 0) {
-      *min_dropped_frames = size - skip_count - max_depth;
-    } else {
-      *min_dropped_frames = 0;
-    }
-  }
-
-  --recursive;
-
-  return result_count;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return true;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_GENERIC_INL_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_powerpc-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_powerpc-inl.inc
deleted file mode 100644
index 2e7c2f4..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_powerpc-inl.inc
+++ /dev/null
@@ -1,248 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Produce stack trace.  I'm guessing (hoping!) the code is much like
-// for x86.  For apple machines, at least, it seems to be; see
-//    https://developer.apple.com/documentation/mac/runtimehtml/RTArch-59.html
-//    https://www.linux-foundation.org/spec/ELF/ppc64/PPC-elf64abi-1.9.html#STACK
-// Linux has similar code: http://patchwork.ozlabs.org/linuxppc/patch?id=8882
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_POWERPC_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_POWERPC_INL_H_
-
-#if defined(__linux__)
-#include <asm/ptrace.h>   // for PT_NIP.
-#include <ucontext.h>     // for ucontext_t
-#endif
-
-#include <unistd.h>
-#include <cassert>
-#include <cstdint>
-#include <cstdio>
-
-#include "absl/base/attributes.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/internal/address_is_readable.h"
-#include "absl/debugging/internal/vdso_support.h"  // a no-op on non-elf or non-glibc systems
-
-// Given a stack pointer, return the saved link register value.
-// Note that this is the link register for a callee.
-static inline void *StacktracePowerPCGetLR(void **sp) {
-  // PowerPC has 3 main ABIs, which say where in the stack the
-  // Link Register is.  For DARWIN and AIX (used by apple and
-  // linux ppc64), it's in sp[2].  For SYSV (used by linux ppc),
-  // it's in sp[1].
-#if defined(_CALL_AIX) || defined(_CALL_DARWIN)
-  return *(sp+2);
-#elif defined(_CALL_SYSV)
-  return *(sp+1);
-#elif defined(__APPLE__) || defined(__FreeBSD__) || \
-    (defined(__linux__) && defined(__PPC64__))
-  // This check is in case the compiler doesn't define _CALL_AIX/etc.
-  return *(sp+2);
-#elif defined(__linux)
-  // This check is in case the compiler doesn't define _CALL_SYSV.
-  return *(sp+1);
-#else
-#error Need to specify the PPC ABI for your archiecture.
-#endif
-}
-
-// Given a pointer to a stack frame, locate and return the calling
-// stackframe, or return null if no stackframe can be found. Perform sanity
-// checks (the strictness of which is controlled by the boolean parameter
-// "STRICT_UNWINDING") to reduce the chance that a bad pointer is returned.
-template<bool STRICT_UNWINDING, bool IS_WITH_CONTEXT>
-ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-static void **NextStackFrame(void **old_sp, const void *uc) {
-  void **new_sp = (void **) *old_sp;
-  enum { kStackAlignment = 16 };
-
-  // Check that the transition from frame pointer old_sp to frame
-  // pointer new_sp isn't clearly bogus
-  if (STRICT_UNWINDING) {
-    // With the stack growing downwards, older stack frame must be
-    // at a greater address that the current one.
-    if (new_sp <= old_sp) return nullptr;
-    // Assume stack frames larger than 100,000 bytes are bogus.
-    if ((uintptr_t)new_sp - (uintptr_t)old_sp > 100000) return nullptr;
-  } else {
-    // In the non-strict mode, allow discontiguous stack frames.
-    // (alternate-signal-stacks for example).
-    if (new_sp == old_sp) return nullptr;
-    // And allow frames upto about 1MB.
-    if ((new_sp > old_sp)
-        && ((uintptr_t)new_sp - (uintptr_t)old_sp > 1000000)) return nullptr;
-  }
-  if ((uintptr_t)new_sp % kStackAlignment != 0) return nullptr;
-
-#if defined(__linux__)
-  enum StackTraceKernelSymbolStatus {
-      kNotInitialized = 0, kAddressValid, kAddressInvalid };
-
-  if (IS_WITH_CONTEXT && uc != nullptr) {
-    static StackTraceKernelSymbolStatus kernel_symbol_status =
-        kNotInitialized;  // Sentinel: not computed yet.
-    // Initialize with sentinel value: __kernel_rt_sigtramp_rt64 can not
-    // possibly be there.
-    static const unsigned char *kernel_sigtramp_rt64_address = nullptr;
-    if (kernel_symbol_status == kNotInitialized) {
-      absl::debugging_internal::VDSOSupport vdso;
-      if (vdso.IsPresent()) {
-        absl::debugging_internal::VDSOSupport::SymbolInfo
-            sigtramp_rt64_symbol_info;
-        if (!vdso.LookupSymbol(
-                "__kernel_sigtramp_rt64", "LINUX_2.6.15",
-                absl::debugging_internal::VDSOSupport::kVDSOSymbolType,
-                &sigtramp_rt64_symbol_info) ||
-            sigtramp_rt64_symbol_info.address == nullptr) {
-          // Unexpected: VDSO is present, yet the expected symbol is missing
-          // or null.
-          assert(false && "VDSO is present, but doesn't have expected symbol");
-          kernel_symbol_status = kAddressInvalid;
-        } else {
-          kernel_sigtramp_rt64_address =
-              reinterpret_cast<const unsigned char *>(
-                  sigtramp_rt64_symbol_info.address);
-          kernel_symbol_status = kAddressValid;
-        }
-      } else {
-        kernel_symbol_status = kAddressInvalid;
-      }
-    }
-
-    if (new_sp != nullptr &&
-        kernel_symbol_status == kAddressValid &&
-        StacktracePowerPCGetLR(new_sp) == kernel_sigtramp_rt64_address) {
-      const ucontext_t* signal_context =
-          reinterpret_cast<const ucontext_t*>(uc);
-      void **const sp_before_signal =
-          reinterpret_cast<void**>(signal_context->uc_mcontext.gp_regs[PT_R1]);
-      // Check that alleged sp before signal is nonnull and is reasonably
-      // aligned.
-      if (sp_before_signal != nullptr &&
-          ((uintptr_t)sp_before_signal % kStackAlignment) == 0) {
-        // Check that alleged stack pointer is actually readable. This is to
-        // prevent a "double fault" in case we hit the first fault due to e.g.
-        // a stack corruption.
-        if (absl::debugging_internal::AddressIsReadable(sp_before_signal)) {
-          // Alleged stack pointer is readable, use it for further unwinding.
-          new_sp = sp_before_signal;
-        }
-      }
-    }
-  }
-#endif
-
-  return new_sp;
-}
-
-// This ensures that absl::GetStackTrace sets up the Link Register properly.
-ABSL_ATTRIBUTE_NOINLINE static void AbslStacktracePowerPCDummyFunction() {
-  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
-}
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
-                      const void *ucp, int *min_dropped_frames) {
-  void **sp;
-  // Apple macOS uses an old version of gnu as -- both Darwin 7.9.0 (Panther)
-  // and Darwin 8.8.1 (Tiger) use as 1.38.  This means we have to use a
-  // different asm syntax.  I don't know quite the best way to discriminate
-  // systems using the old as from the new one; I've gone with __APPLE__.
-#ifdef __APPLE__
-  __asm__ volatile ("mr %0,r1" : "=r" (sp));
-#else
-  __asm__ volatile ("mr %0,1" : "=r" (sp));
-#endif
-
-  // On PowerPC, the "Link Register" or "Link Record" (LR), is a stack
-  // entry that holds the return address of the subroutine call (what
-  // instruction we run after our function finishes).  This is the
-  // same as the stack-pointer of our parent routine, which is what we
-  // want here.  While the compiler will always(?) set up LR for
-  // subroutine calls, it may not for leaf functions (such as this one).
-  // This routine forces the compiler (at least gcc) to push it anyway.
-  AbslStacktracePowerPCDummyFunction();
-
-  // The LR save area is used by the callee, so the top entry is bogus.
-  skip_count++;
-
-  int n = 0;
-
-  // Unlike ABIs of X86 and ARM, PowerPC ABIs say that return address (in
-  // the link register) of a function call is stored in the caller's stack
-  // frame instead of the callee's.  When we look for the return address
-  // associated with a stack frame, we need to make sure that there is a
-  // caller frame before it.  So we call NextStackFrame before entering the
-  // loop below and check next_sp instead of sp for loop termination.
-  // The outermost frame is set up by runtimes and it does not have a
-  // caller frame, so it is skipped.
-
-  // The absl::GetStackFrames routine is called when we are in some
-  // informational context (the failure signal handler for example).
-  // Use the non-strict unwinding rules to produce a stack trace
-  // that is as complete as possible (even if it contains a few
-  // bogus entries in some rare cases).
-  void **next_sp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(sp, ucp);
-
-  while (next_sp && n < max_depth) {
-    if (skip_count > 0) {
-      skip_count--;
-    } else {
-      result[n] = StacktracePowerPCGetLR(sp);
-      if (IS_STACK_FRAMES) {
-        if (next_sp > sp) {
-          sizes[n] = (uintptr_t)next_sp - (uintptr_t)sp;
-        } else {
-          // A frame-size of 0 is used to indicate unknown frame size.
-          sizes[n] = 0;
-        }
-      }
-      n++;
-    }
-
-    sp = next_sp;
-    next_sp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(sp, ucp);
-  }
-
-  if (min_dropped_frames != nullptr) {
-    // Implementation detail: we clamp the max of frames we are willing to
-    // count, so as not to spend too much time in the loop below.
-    const int kMaxUnwind = 1000;
-    int j = 0;
-    for (; next_sp != nullptr && j < kMaxUnwind; j++) {
-      next_sp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(next_sp, ucp);
-    }
-    *min_dropped_frames = j;
-  }
-  return n;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return true;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_POWERPC_INL_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_unimplemented-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_unimplemented-inl.inc
deleted file mode 100644
index 5b8fb19..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_unimplemented-inl.inc
+++ /dev/null
@@ -1,24 +0,0 @@
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_UNIMPLEMENTED_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_UNIMPLEMENTED_INL_H_
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-static int UnwindImpl(void** /* result */, int* /* sizes */,
-                      int /* max_depth */, int /* skip_count */,
-                      const void* /* ucp */, int *min_dropped_frames) {
-  if (min_dropped_frames != nullptr) {
-    *min_dropped_frames = 0;
-  }
-  return 0;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return false;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_UNIMPLEMENTED_INL_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_win32-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_win32-inl.inc
deleted file mode 100644
index 1c666c8..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_win32-inl.inc
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Produces a stack trace for Windows.  Normally, one could use
-// stacktrace_x86-inl.h or stacktrace_x86_64-inl.h -- and indeed, that
-// should work for binaries compiled using MSVC in "debug" mode.
-// However, in "release" mode, Windows uses frame-pointer
-// optimization, which makes getting a stack trace very difficult.
-//
-// There are several approaches one can take.  One is to use Windows
-// intrinsics like StackWalk64.  These can work, but have restrictions
-// on how successful they can be.  Another attempt is to write a
-// version of stacktrace_x86-inl.h that has heuristic support for
-// dealing with FPO, similar to what WinDbg does (see
-// http://www.nynaeve.net/?p=97).  There are (non-working) examples of
-// these approaches, complete with TODOs, in stacktrace_win32-inl.h#1
-//
-// The solution we've ended up doing is to call the undocumented
-// windows function RtlCaptureStackBackTrace, which probably doesn't
-// work with FPO but at least is fast, and doesn't require a symbol
-// server.
-//
-// This code is inspired by a patch from David Vitek:
-//   https://code.google.com/p/google-perftools/issues/detail?id=83
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_WIN32_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_WIN32_INL_H_
-
-#include <windows.h>    // for GetProcAddress and GetModuleHandle
-#include <cassert>
-
-typedef USHORT NTAPI RtlCaptureStackBackTrace_Function(
-    IN ULONG frames_to_skip,
-    IN ULONG frames_to_capture,
-    OUT PVOID *backtrace,
-    OUT PULONG backtrace_hash);
-
-// It is not possible to load RtlCaptureStackBackTrace at static init time in
-// UWP. CaptureStackBackTrace is the public version of RtlCaptureStackBackTrace
-#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && \
-    !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-static RtlCaptureStackBackTrace_Function* const RtlCaptureStackBackTrace_fn =
-    &::CaptureStackBackTrace;
-#else
-// Load the function we need at static init time, where we don't have
-// to worry about someone else holding the loader's lock.
-static RtlCaptureStackBackTrace_Function* const RtlCaptureStackBackTrace_fn =
-    (RtlCaptureStackBackTrace_Function*)GetProcAddress(
-        GetModuleHandleA("ntdll.dll"), "RtlCaptureStackBackTrace");
-#endif  // WINAPI_PARTITION_APP && !WINAPI_PARTITION_DESKTOP
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
-                      const void*, int* min_dropped_frames) {
-  int n = 0;
-  if (!RtlCaptureStackBackTrace_fn) {
-    // can't find a stacktrace with no function to call
-  } else {
-    n = (int)RtlCaptureStackBackTrace_fn(skip_count + 2, max_depth, result, 0);
-  }
-  if (IS_STACK_FRAMES) {
-    // No implementation for finding out the stack frame sizes yet.
-    memset(sizes, 0, sizeof(*sizes) * n);
-  }
-  if (min_dropped_frames != nullptr) {
-    // Not implemented.
-    *min_dropped_frames = 0;
-  }
-  return n;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return false;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_WIN32_INL_H_
diff --git a/third_party/abseil/absl/debugging/internal/stacktrace_x86-inl.inc b/third_party/abseil/absl/debugging/internal/stacktrace_x86-inl.inc
deleted file mode 100644
index bc320ff..0000000
--- a/third_party/abseil/absl/debugging/internal/stacktrace_x86-inl.inc
+++ /dev/null
@@ -1,346 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Produce stack trace
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_X86_INL_INC_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_X86_INL_INC_
-
-#if defined(__linux__) && (defined(__i386__) || defined(__x86_64__))
-#include <ucontext.h>  // for ucontext_t
-#endif
-
-#if !defined(_WIN32)
-#include <unistd.h>
-#endif
-
-#include <cassert>
-#include <cstdint>
-
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/debugging/internal/address_is_readable.h"
-#include "absl/debugging/internal/vdso_support.h"  // a no-op on non-elf or non-glibc systems
-#include "absl/debugging/stacktrace.h"
-
-#include "absl/base/internal/raw_logging.h"
-
-using absl::debugging_internal::AddressIsReadable;
-
-#if defined(__linux__) && defined(__i386__)
-// Count "push %reg" instructions in VDSO __kernel_vsyscall(),
-// preceeding "syscall" or "sysenter".
-// If __kernel_vsyscall uses frame pointer, answer 0.
-//
-// kMaxBytes tells how many instruction bytes of __kernel_vsyscall
-// to analyze before giving up. Up to kMaxBytes+1 bytes of
-// instructions could be accessed.
-//
-// Here are known __kernel_vsyscall instruction sequences:
-//
-// SYSENTER (linux-2.6.26/arch/x86/vdso/vdso32/sysenter.S).
-// Used on Intel.
-//  0xffffe400 <__kernel_vsyscall+0>:       push   %ecx
-//  0xffffe401 <__kernel_vsyscall+1>:       push   %edx
-//  0xffffe402 <__kernel_vsyscall+2>:       push   %ebp
-//  0xffffe403 <__kernel_vsyscall+3>:       mov    %esp,%ebp
-//  0xffffe405 <__kernel_vsyscall+5>:       sysenter
-//
-// SYSCALL (see linux-2.6.26/arch/x86/vdso/vdso32/syscall.S).
-// Used on AMD.
-//  0xffffe400 <__kernel_vsyscall+0>:       push   %ebp
-//  0xffffe401 <__kernel_vsyscall+1>:       mov    %ecx,%ebp
-//  0xffffe403 <__kernel_vsyscall+3>:       syscall
-//
-
-// The sequence below isn't actually expected in Google fleet,
-// here only for completeness. Remove this comment from OSS release.
-
-// i386 (see linux-2.6.26/arch/x86/vdso/vdso32/int80.S)
-//  0xffffe400 <__kernel_vsyscall+0>:       int $0x80
-//  0xffffe401 <__kernel_vsyscall+1>:       ret
-//
-static const int kMaxBytes = 10;
-
-// We use assert()s instead of DCHECK()s -- this is too low level
-// for DCHECK().
-
-static int CountPushInstructions(const unsigned char *const addr) {
-  int result = 0;
-  for (int i = 0; i < kMaxBytes; ++i) {
-    if (addr[i] == 0x89) {
-      // "mov reg,reg"
-      if (addr[i + 1] == 0xE5) {
-        // Found "mov %esp,%ebp".
-        return 0;
-      }
-      ++i;  // Skip register encoding byte.
-    } else if (addr[i] == 0x0F &&
-               (addr[i + 1] == 0x34 || addr[i + 1] == 0x05)) {
-      // Found "sysenter" or "syscall".
-      return result;
-    } else if ((addr[i] & 0xF0) == 0x50) {
-      // Found "push %reg".
-      ++result;
-    } else if (addr[i] == 0xCD && addr[i + 1] == 0x80) {
-      // Found "int $0x80"
-      assert(result == 0);
-      return 0;
-    } else {
-      // Unexpected instruction.
-      assert(false && "unexpected instruction in __kernel_vsyscall");
-      return 0;
-    }
-  }
-  // Unexpected: didn't find SYSENTER or SYSCALL in
-  // [__kernel_vsyscall, __kernel_vsyscall + kMaxBytes) interval.
-  assert(false && "did not find SYSENTER or SYSCALL in __kernel_vsyscall");
-  return 0;
-}
-#endif
-
-// Assume stack frames larger than 100,000 bytes are bogus.
-static const int kMaxFrameBytes = 100000;
-
-// Returns the stack frame pointer from signal context, 0 if unknown.
-// vuc is a ucontext_t *.  We use void* to avoid the use
-// of ucontext_t on non-POSIX systems.
-static uintptr_t GetFP(const void *vuc) {
-#if !defined(__linux__)
-  static_cast<void>(vuc);  // Avoid an unused argument compiler warning.
-#else
-  if (vuc != nullptr) {
-    auto *uc = reinterpret_cast<const ucontext_t *>(vuc);
-#if defined(__i386__)
-    const auto bp = uc->uc_mcontext.gregs[REG_EBP];
-    const auto sp = uc->uc_mcontext.gregs[REG_ESP];
-#elif defined(__x86_64__)
-    const auto bp = uc->uc_mcontext.gregs[REG_RBP];
-    const auto sp = uc->uc_mcontext.gregs[REG_RSP];
-#else
-    const uintptr_t bp = 0;
-    const uintptr_t sp = 0;
-#endif
-    // Sanity-check that the base pointer is valid.  It should be as long as
-    // SHRINK_WRAP_FRAME_POINTER is not set, but it's possible that some code in
-    // the process is compiled with --copt=-fomit-frame-pointer or
-    // --copt=-momit-leaf-frame-pointer.
-    //
-    // TODO(bcmills): -momit-leaf-frame-pointer is currently the default
-    // behavior when building with clang.  Talk to the C++ toolchain team about
-    // fixing that.
-    if (bp >= sp && bp - sp <= kMaxFrameBytes) return bp;
-
-    // If bp isn't a plausible frame pointer, return the stack pointer instead.
-    // If we're lucky, it points to the start of a stack frame; otherwise, we'll
-    // get one frame of garbage in the stack trace and fail the sanity check on
-    // the next iteration.
-    return sp;
-  }
-#endif
-  return 0;
-}
-
-// Given a pointer to a stack frame, locate and return the calling
-// stackframe, or return null if no stackframe can be found. Perform sanity
-// checks (the strictness of which is controlled by the boolean parameter
-// "STRICT_UNWINDING") to reduce the chance that a bad pointer is returned.
-template <bool STRICT_UNWINDING, bool WITH_CONTEXT>
-ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-static void **NextStackFrame(void **old_fp, const void *uc) {
-  void **new_fp = (void **)*old_fp;
-
-#if defined(__linux__) && defined(__i386__)
-  if (WITH_CONTEXT && uc != nullptr) {
-    // How many "push %reg" instructions are there at __kernel_vsyscall?
-    // This is constant for a given kernel and processor, so compute
-    // it only once.
-    static int num_push_instructions = -1;  // Sentinel: not computed yet.
-    // Initialize with sentinel value: __kernel_rt_sigreturn can not possibly
-    // be there.
-    static const unsigned char *kernel_rt_sigreturn_address = nullptr;
-    static const unsigned char *kernel_vsyscall_address = nullptr;
-    if (num_push_instructions == -1) {
-#ifdef ABSL_HAVE_VDSO_SUPPORT
-      absl::debugging_internal::VDSOSupport vdso;
-      if (vdso.IsPresent()) {
-        absl::debugging_internal::VDSOSupport::SymbolInfo
-            rt_sigreturn_symbol_info;
-        absl::debugging_internal::VDSOSupport::SymbolInfo vsyscall_symbol_info;
-        if (!vdso.LookupSymbol("__kernel_rt_sigreturn", "LINUX_2.5", STT_FUNC,
-                               &rt_sigreturn_symbol_info) ||
-            !vdso.LookupSymbol("__kernel_vsyscall", "LINUX_2.5", STT_FUNC,
-                               &vsyscall_symbol_info) ||
-            rt_sigreturn_symbol_info.address == nullptr ||
-            vsyscall_symbol_info.address == nullptr) {
-          // Unexpected: 32-bit VDSO is present, yet one of the expected
-          // symbols is missing or null.
-          assert(false && "VDSO is present, but doesn't have expected symbols");
-          num_push_instructions = 0;
-        } else {
-          kernel_rt_sigreturn_address =
-              reinterpret_cast<const unsigned char *>(
-                  rt_sigreturn_symbol_info.address);
-          kernel_vsyscall_address =
-              reinterpret_cast<const unsigned char *>(
-                  vsyscall_symbol_info.address);
-          num_push_instructions =
-              CountPushInstructions(kernel_vsyscall_address);
-        }
-      } else {
-        num_push_instructions = 0;
-      }
-#else  // ABSL_HAVE_VDSO_SUPPORT
-      num_push_instructions = 0;
-#endif  // ABSL_HAVE_VDSO_SUPPORT
-    }
-    if (num_push_instructions != 0 && kernel_rt_sigreturn_address != nullptr &&
-        old_fp[1] == kernel_rt_sigreturn_address) {
-      const ucontext_t *ucv = static_cast<const ucontext_t *>(uc);
-      // This kernel does not use frame pointer in its VDSO code,
-      // and so %ebp is not suitable for unwinding.
-      void **const reg_ebp =
-          reinterpret_cast<void **>(ucv->uc_mcontext.gregs[REG_EBP]);
-      const unsigned char *const reg_eip =
-          reinterpret_cast<unsigned char *>(ucv->uc_mcontext.gregs[REG_EIP]);
-      if (new_fp == reg_ebp && kernel_vsyscall_address <= reg_eip &&
-          reg_eip - kernel_vsyscall_address < kMaxBytes) {
-        // We "stepped up" to __kernel_vsyscall, but %ebp is not usable.
-        // Restore from 'ucv' instead.
-        void **const reg_esp =
-            reinterpret_cast<void **>(ucv->uc_mcontext.gregs[REG_ESP]);
-        // Check that alleged %esp is not null and is reasonably aligned.
-        if (reg_esp &&
-            ((uintptr_t)reg_esp & (sizeof(reg_esp) - 1)) == 0) {
-          // Check that alleged %esp is actually readable. This is to prevent
-          // "double fault" in case we hit the first fault due to e.g. stack
-          // corruption.
-          void *const reg_esp2 = reg_esp[num_push_instructions - 1];
-          if (AddressIsReadable(reg_esp2)) {
-            // Alleged %esp is readable, use it for further unwinding.
-            new_fp = reinterpret_cast<void **>(reg_esp2);
-          }
-        }
-      }
-    }
-  }
-#endif
-
-  const uintptr_t old_fp_u = reinterpret_cast<uintptr_t>(old_fp);
-  const uintptr_t new_fp_u = reinterpret_cast<uintptr_t>(new_fp);
-
-  // Check that the transition from frame pointer old_fp to frame
-  // pointer new_fp isn't clearly bogus.  Skip the checks if new_fp
-  // matches the signal context, so that we don't skip out early when
-  // using an alternate signal stack.
-  //
-  // TODO(bcmills): The GetFP call should be completely unnecessary when
-  // SHRINK_WRAP_FRAME_POINTER is set (because we should be back in the thread's
-  // stack by this point), but it is empirically still needed (e.g. when the
-  // stack includes a call to abort).  unw_get_reg returns UNW_EBADREG for some
-  // frames.  Figure out why GetValidFrameAddr and/or libunwind isn't doing what
-  // it's supposed to.
-  if (STRICT_UNWINDING &&
-      (!WITH_CONTEXT || uc == nullptr || new_fp_u != GetFP(uc))) {
-    // With the stack growing downwards, older stack frame must be
-    // at a greater address that the current one.
-    if (new_fp_u <= old_fp_u) return nullptr;
-    if (new_fp_u - old_fp_u > kMaxFrameBytes) return nullptr;
-  } else {
-    if (new_fp == nullptr) return nullptr;  // skip AddressIsReadable() below
-    // In the non-strict mode, allow discontiguous stack frames.
-    // (alternate-signal-stacks for example).
-    if (new_fp == old_fp) return nullptr;
-  }
-
-  if (new_fp_u & (sizeof(void *) - 1)) return nullptr;
-#ifdef __i386__
-  // On 32-bit machines, the stack pointer can be very close to
-  // 0xffffffff, so we explicitly check for a pointer into the
-  // last two pages in the address space
-  if (new_fp_u >= 0xffffe000) return nullptr;
-#endif
-#if !defined(_WIN32)
-  if (!STRICT_UNWINDING) {
-    // Lax sanity checks cause a crash in 32-bit tcmalloc/crash_reason_test
-    // on AMD-based machines with VDSO-enabled kernels.
-    // Make an extra sanity check to insure new_fp is readable.
-    // Note: NextStackFrame<false>() is only called while the program
-    //       is already on its last leg, so it's ok to be slow here.
-
-    if (!AddressIsReadable(new_fp)) {
-      return nullptr;
-    }
-  }
-#endif
-  return new_fp;
-}
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS  // May read random elements from stack.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY   // May read random elements from stack.
-ABSL_ATTRIBUTE_NOINLINE
-static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
-                      const void *ucp, int *min_dropped_frames) {
-  int n = 0;
-  void **fp = reinterpret_cast<void **>(__builtin_frame_address(0));
-
-  while (fp && n < max_depth) {
-    if (*(fp + 1) == reinterpret_cast<void *>(0)) {
-      // In 64-bit code, we often see a frame that
-      // points to itself and has a return address of 0.
-      break;
-    }
-    void **next_fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(fp, ucp);
-    if (skip_count > 0) {
-      skip_count--;
-    } else {
-      result[n] = *(fp + 1);
-      if (IS_STACK_FRAMES) {
-        if (next_fp > fp) {
-          sizes[n] = (uintptr_t)next_fp - (uintptr_t)fp;
-        } else {
-          // A frame-size of 0 is used to indicate unknown frame size.
-          sizes[n] = 0;
-        }
-      }
-      n++;
-    }
-    fp = next_fp;
-  }
-  if (min_dropped_frames != nullptr) {
-    // Implementation detail: we clamp the max of frames we are willing to
-    // count, so as not to spend too much time in the loop below.
-    const int kMaxUnwind = 1000;
-    int j = 0;
-    for (; fp != nullptr && j < kMaxUnwind; j++) {
-      fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(fp, ucp);
-    }
-    *min_dropped_frames = j;
-  }
-  return n;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return true;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_X86_INL_INC_
diff --git a/third_party/abseil/absl/debugging/internal/symbolize.h b/third_party/abseil/absl/debugging/internal/symbolize.h
deleted file mode 100644
index 4f26130..0000000
--- a/third_party/abseil/absl/debugging/internal/symbolize.h
+++ /dev/null
@@ -1,147 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file contains internal parts of the Abseil symbolizer.
-// Do not depend on the anything in this file, it may change at anytime.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_SYMBOLIZE_H_
-#define ABSL_DEBUGGING_INTERNAL_SYMBOLIZE_H_
-
-#ifdef __cplusplus
-
-#include <cstddef>
-#include <cstdint>
-
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-#ifdef ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE
-#error ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE cannot be directly set
-#elif defined(__ELF__) && defined(__GLIBC__) && !defined(__native_client__) && \
-    !defined(__asmjs__) && !defined(__wasm__)
-#define ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE 1
-
-#include <elf.h>
-#include <link.h>  // For ElfW() macro.
-#include <functional>
-#include <string>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// Iterates over all sections, invoking callback on each with the section name
-// and the section header.
-//
-// Returns true on success; otherwise returns false in case of errors.
-//
-// This is not async-signal-safe.
-bool ForEachSection(int fd,
-                    const std::function<bool(absl::string_view name,
-                                             const ElfW(Shdr) &)>& callback);
-
-// Gets the section header for the given name, if it exists. Returns true on
-// success. Otherwise, returns false.
-bool GetSectionHeaderByName(int fd, const char *name, size_t name_len,
-                            ElfW(Shdr) *out);
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE
-
-#ifdef ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE
-#error ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE cannot be directly set
-#elif defined(__APPLE__)
-#define ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE 1
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-struct SymbolDecoratorArgs {
-  // The program counter we are getting symbolic name for.
-  const void *pc;
-  // 0 for main executable, load address for shared libraries.
-  ptrdiff_t relocation;
-  // Read-only file descriptor for ELF image covering "pc",
-  // or -1 if no such ELF image exists in /proc/self/maps.
-  int fd;
-  // Output buffer, size.
-  // Note: the buffer may not be empty -- default symbolizer may have already
-  // produced some output, and earlier decorators may have adorned it in
-  // some way. You are free to replace or augment the contents (within the
-  // symbol_buf_size limit).
-  char *const symbol_buf;
-  size_t symbol_buf_size;
-  // Temporary scratch space, size.
-  // Use that space in preference to allocating your own stack buffer to
-  // conserve stack.
-  char *const tmp_buf;
-  size_t tmp_buf_size;
-  // User-provided argument
-  void* arg;
-};
-using SymbolDecorator = void (*)(const SymbolDecoratorArgs *);
-
-// Installs a function-pointer as a decorator. Returns a value less than zero
-// if the system cannot install the decorator. Otherwise, returns a unique
-// identifier corresponding to the decorator. This identifier can be used to
-// uninstall the decorator - See RemoveSymbolDecorator() below.
-int InstallSymbolDecorator(SymbolDecorator decorator, void* arg);
-
-// Removes a previously installed function-pointer decorator. Parameter "ticket"
-// is the return-value from calling InstallSymbolDecorator().
-bool RemoveSymbolDecorator(int ticket);
-
-// Remove all installed decorators.  Returns true if successful, false if
-// symbolization is currently in progress.
-bool RemoveAllSymbolDecorators(void);
-
-// Registers an address range to a file mapping.
-//
-// Preconditions:
-//   start <= end
-//   filename != nullptr
-//
-// Returns true if the file was successfully registered.
-bool RegisterFileMappingHint(const void* start, const void* end,
-                             uint64_t offset, const char* filename);
-
-// Looks up the file mapping registered by RegisterFileMappingHint for an
-// address range. If there is one, the file name is stored in *filename and
-// *start and *end are modified to reflect the registered mapping. Returns
-// whether any hint was found.
-bool GetFileMappingHint(const void** start, const void** end, uint64_t* offset,
-                        const char** filename);
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // __cplusplus
-
-#include <stdbool.h>
-
-#ifdef __cplusplus
-extern "C"
-#endif  // __cplusplus
-
-    bool
-    AbslInternalGetFileMappingHint(const void** start, const void** end,
-                                   uint64_t* offset, const char** filename);
-
-#endif  // ABSL_DEBUGGING_INTERNAL_SYMBOLIZE_H_
diff --git a/third_party/abseil/absl/debugging/internal/vdso_support.cc b/third_party/abseil/absl/debugging/internal/vdso_support.cc
deleted file mode 100644
index 6be16d9..0000000
--- a/third_party/abseil/absl/debugging/internal/vdso_support.cc
+++ /dev/null
@@ -1,173 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Allow dynamic symbol lookup in the kernel VDSO page.
-//
-// VDSOSupport -- a class representing kernel VDSO (if present).
-
-#include "absl/debugging/internal/vdso_support.h"
-
-#ifdef ABSL_HAVE_VDSO_SUPPORT     // defined in vdso_support.h
-
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#if __GLIBC_PREREQ(2, 16)  // GLIBC-2.16 implements getauxval.
-#include <sys/auxv.h>
-#endif
-
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/port.h"
-
-#ifndef AT_SYSINFO_EHDR
-#define AT_SYSINFO_EHDR 33  // for crosstoolv10
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-ABSL_CONST_INIT
-std::atomic<const void *> VDSOSupport::vdso_base_(
-    debugging_internal::ElfMemImage::kInvalidBase);
-
-std::atomic<VDSOSupport::GetCpuFn> VDSOSupport::getcpu_fn_(&InitAndGetCPU);
-VDSOSupport::VDSOSupport()
-    // If vdso_base_ is still set to kInvalidBase, we got here
-    // before VDSOSupport::Init has been called. Call it now.
-    : image_(vdso_base_.load(std::memory_order_relaxed) ==
-                     debugging_internal::ElfMemImage::kInvalidBase
-                 ? Init()
-                 : vdso_base_.load(std::memory_order_relaxed)) {}
-
-// NOTE: we can't use GoogleOnceInit() below, because we can be
-// called by tcmalloc, and none of the *once* stuff may be functional yet.
-//
-// In addition, we hope that the VDSOSupportHelper constructor
-// causes this code to run before there are any threads, and before
-// InitGoogle() has executed any chroot or setuid calls.
-//
-// Finally, even if there is a race here, it is harmless, because
-// the operation should be idempotent.
-const void *VDSOSupport::Init() {
-  const auto kInvalidBase = debugging_internal::ElfMemImage::kInvalidBase;
-#if __GLIBC_PREREQ(2, 16)
-  if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) {
-    errno = 0;
-    const void *const sysinfo_ehdr =
-        reinterpret_cast<const void *>(getauxval(AT_SYSINFO_EHDR));
-    if (errno == 0) {
-      vdso_base_.store(sysinfo_ehdr, std::memory_order_relaxed);
-    }
-  }
-#endif  // __GLIBC_PREREQ(2, 16)
-  if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) {
-    int fd = open("/proc/self/auxv", O_RDONLY);
-    if (fd == -1) {
-      // Kernel too old to have a VDSO.
-      vdso_base_.store(nullptr, std::memory_order_relaxed);
-      getcpu_fn_.store(&GetCPUViaSyscall, std::memory_order_relaxed);
-      return nullptr;
-    }
-    ElfW(auxv_t) aux;
-    while (read(fd, &aux, sizeof(aux)) == sizeof(aux)) {
-      if (aux.a_type == AT_SYSINFO_EHDR) {
-        vdso_base_.store(reinterpret_cast<void *>(aux.a_un.a_val),
-                         std::memory_order_relaxed);
-        break;
-      }
-    }
-    close(fd);
-    if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) {
-      // Didn't find AT_SYSINFO_EHDR in auxv[].
-      vdso_base_.store(nullptr, std::memory_order_relaxed);
-    }
-  }
-  GetCpuFn fn = &GetCPUViaSyscall;  // default if VDSO not present.
-  if (vdso_base_.load(std::memory_order_relaxed)) {
-    VDSOSupport vdso;
-    SymbolInfo info;
-    if (vdso.LookupSymbol("__vdso_getcpu", "LINUX_2.6", STT_FUNC, &info)) {
-      fn = reinterpret_cast<GetCpuFn>(const_cast<void *>(info.address));
-    }
-  }
-  // Subtle: this code runs outside of any locks; prevent compiler
-  // from assigning to getcpu_fn_ more than once.
-  getcpu_fn_.store(fn, std::memory_order_relaxed);
-  return vdso_base_.load(std::memory_order_relaxed);
-}
-
-const void *VDSOSupport::SetBase(const void *base) {
-  ABSL_RAW_CHECK(base != debugging_internal::ElfMemImage::kInvalidBase,
-                 "internal error");
-  const void *old_base = vdso_base_.load(std::memory_order_relaxed);
-  vdso_base_.store(base, std::memory_order_relaxed);
-  image_.Init(base);
-  // Also reset getcpu_fn_, so GetCPU could be tested with simulated VDSO.
-  getcpu_fn_.store(&InitAndGetCPU, std::memory_order_relaxed);
-  return old_base;
-}
-
-bool VDSOSupport::LookupSymbol(const char *name,
-                               const char *version,
-                               int type,
-                               SymbolInfo *info) const {
-  return image_.LookupSymbol(name, version, type, info);
-}
-
-bool VDSOSupport::LookupSymbolByAddress(const void *address,
-                                        SymbolInfo *info_out) const {
-  return image_.LookupSymbolByAddress(address, info_out);
-}
-
-// NOLINT on 'long' because this routine mimics kernel api.
-long VDSOSupport::GetCPUViaSyscall(unsigned *cpu,  // NOLINT(runtime/int)
-                                   void *, void *) {
-#ifdef SYS_getcpu
-  return syscall(SYS_getcpu, cpu, nullptr, nullptr);
-#else
-  // x86_64 never implemented sys_getcpu(), except as a VDSO call.
-  static_cast<void>(cpu);  // Avoid an unused argument compiler warning.
-  errno = ENOSYS;
-  return -1;
-#endif
-}
-
-// Use fast __vdso_getcpu if available.
-long VDSOSupport::InitAndGetCPU(unsigned *cpu,  // NOLINT(runtime/int)
-                                void *x, void *y) {
-  Init();
-  GetCpuFn fn = getcpu_fn_.load(std::memory_order_relaxed);
-  ABSL_RAW_CHECK(fn != &InitAndGetCPU, "Init() did not set getcpu_fn_");
-  return (*fn)(cpu, x, y);
-}
-
-// This function must be very fast, and may be called from very
-// low level (e.g. tcmalloc). Hence I avoid things like
-// GoogleOnceInit() and ::operator new.
-ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY
-int GetCPU() {
-  unsigned cpu;
-  int ret_code = (*VDSOSupport::getcpu_fn_)(&cpu, nullptr, nullptr);
-  return ret_code == 0 ? cpu : ret_code;
-}
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HAVE_VDSO_SUPPORT
diff --git a/third_party/abseil/absl/debugging/internal/vdso_support.h b/third_party/abseil/absl/debugging/internal/vdso_support.h
deleted file mode 100644
index 6562c6c..0000000
--- a/third_party/abseil/absl/debugging/internal/vdso_support.h
+++ /dev/null
@@ -1,158 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// Allow dynamic symbol lookup in the kernel VDSO page.
-//
-// VDSO stands for "Virtual Dynamic Shared Object" -- a page of
-// executable code, which looks like a shared library, but doesn't
-// necessarily exist anywhere on disk, and which gets mmap()ed into
-// every process by kernels which support VDSO, such as 2.6.x for 32-bit
-// executables, and 2.6.24 and above for 64-bit executables.
-//
-// More details could be found here:
-// http://www.trilithium.com/johan/2005/08/linux-gate/
-//
-// VDSOSupport -- a class representing kernel VDSO (if present).
-//
-// Example usage:
-//  VDSOSupport vdso;
-//  VDSOSupport::SymbolInfo info;
-//  typedef (*FN)(unsigned *, void *, void *);
-//  FN fn = nullptr;
-//  if (vdso.LookupSymbol("__vdso_getcpu", "LINUX_2.6", STT_FUNC, &info)) {
-//     fn = reinterpret_cast<FN>(info.address);
-//  }
-
-#ifndef ABSL_DEBUGGING_INTERNAL_VDSO_SUPPORT_H_
-#define ABSL_DEBUGGING_INTERNAL_VDSO_SUPPORT_H_
-
-#include <atomic>
-
-#include "absl/base/attributes.h"
-#include "absl/debugging/internal/elf_mem_image.h"
-
-#ifdef ABSL_HAVE_ELF_MEM_IMAGE
-
-#ifdef ABSL_HAVE_VDSO_SUPPORT
-#error ABSL_HAVE_VDSO_SUPPORT cannot be directly set
-#else
-#define ABSL_HAVE_VDSO_SUPPORT 1
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-
-// NOTE: this class may be used from within tcmalloc, and can not
-// use any memory allocation routines.
-class VDSOSupport {
- public:
-  VDSOSupport();
-
-  typedef ElfMemImage::SymbolInfo SymbolInfo;
-  typedef ElfMemImage::SymbolIterator SymbolIterator;
-
-  // On PowerPC64 VDSO symbols can either be of type STT_FUNC or STT_NOTYPE
-  // depending on how the kernel is built.  The kernel is normally built with
-  // STT_NOTYPE type VDSO symbols.  Let's make things simpler first by using a
-  // compile-time constant.
-#ifdef __powerpc64__
-  enum { kVDSOSymbolType = STT_NOTYPE };
-#else
-  enum { kVDSOSymbolType = STT_FUNC };
-#endif
-
-  // Answers whether we have a vdso at all.
-  bool IsPresent() const { return image_.IsPresent(); }
-
-  // Allow to iterate over all VDSO symbols.
-  SymbolIterator begin() const { return image_.begin(); }
-  SymbolIterator end() const { return image_.end(); }
-
-  // Look up versioned dynamic symbol in the kernel VDSO.
-  // Returns false if VDSO is not present, or doesn't contain given
-  // symbol/version/type combination.
-  // If info_out != nullptr, additional details are filled in.
-  bool LookupSymbol(const char *name, const char *version,
-                    int symbol_type, SymbolInfo *info_out) const;
-
-  // Find info about symbol (if any) which overlaps given address.
-  // Returns true if symbol was found; false if VDSO isn't present
-  // or doesn't have a symbol overlapping given address.
-  // If info_out != nullptr, additional details are filled in.
-  bool LookupSymbolByAddress(const void *address, SymbolInfo *info_out) const;
-
-  // Used only for testing. Replace real VDSO base with a mock.
-  // Returns previous value of vdso_base_. After you are done testing,
-  // you are expected to call SetBase() with previous value, in order to
-  // reset state to the way it was.
-  const void *SetBase(const void *s);
-
-  // Computes vdso_base_ and returns it. Should be called as early as
-  // possible; before any thread creation, chroot or setuid.
-  static const void *Init();
-
- private:
-  // image_ represents VDSO ELF image in memory.
-  // image_.ehdr_ == nullptr implies there is no VDSO.
-  ElfMemImage image_;
-
-  // Cached value of auxv AT_SYSINFO_EHDR, computed once.
-  // This is a tri-state:
-  //   kInvalidBase   => value hasn't been determined yet.
-  //              0   => there is no VDSO.
-  //           else   => vma of VDSO Elf{32,64}_Ehdr.
-  //
-  // When testing with mock VDSO, low bit is set.
-  // The low bit is always available because vdso_base_ is
-  // page-aligned.
-  static std::atomic<const void *> vdso_base_;
-
-  // NOLINT on 'long' because these routines mimic kernel api.
-  // The 'cache' parameter may be used by some versions of the kernel,
-  // and should be nullptr or point to a static buffer containing at
-  // least two 'long's.
-  static long InitAndGetCPU(unsigned *cpu, void *cache,     // NOLINT 'long'.
-                            void *unused);
-  static long GetCPUViaSyscall(unsigned *cpu, void *cache,  // NOLINT 'long'.
-                               void *unused);
-  typedef long (*GetCpuFn)(unsigned *cpu, void *cache,      // NOLINT 'long'.
-                           void *unused);
-
-  // This function pointer may point to InitAndGetCPU,
-  // GetCPUViaSyscall, or __vdso_getcpu at different stages of initialization.
-  ABSL_CONST_INIT static std::atomic<GetCpuFn> getcpu_fn_;
-
-  friend int GetCPU(void);  // Needs access to getcpu_fn_.
-
-  VDSOSupport(const VDSOSupport&) = delete;
-  VDSOSupport& operator=(const VDSOSupport&) = delete;
-};
-
-// Same as sched_getcpu() on later glibc versions.
-// Return current CPU, using (fast) __vdso_getcpu@LINUX_2.6 if present,
-// otherwise use syscall(SYS_getcpu,...).
-// May return -1 with errno == ENOSYS if the kernel doesn't
-// support SYS_getcpu.
-int GetCPU();
-
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HAVE_ELF_MEM_IMAGE
-
-#endif  // ABSL_DEBUGGING_INTERNAL_VDSO_SUPPORT_H_
diff --git a/third_party/abseil/absl/debugging/leak_check.cc b/third_party/abseil/absl/debugging/leak_check.cc
deleted file mode 100644
index ff90495..0000000
--- a/third_party/abseil/absl/debugging/leak_check.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Wrappers around lsan_interface functions.
-// When lsan is not linked in, these functions are not available,
-// therefore Abseil code which depends on these functions is conditioned on the
-// definition of LEAK_SANITIZER.
-#include "absl/debugging/leak_check.h"
-
-#ifndef LEAK_SANITIZER
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-bool HaveLeakSanitizer() { return false; }
-void DoIgnoreLeak(const void*) { }
-void RegisterLivePointers(const void*, size_t) { }
-void UnRegisterLivePointers(const void*, size_t) { }
-LeakCheckDisabler::LeakCheckDisabler() { }
-LeakCheckDisabler::~LeakCheckDisabler() { }
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else
-
-#include <sanitizer/lsan_interface.h>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-bool HaveLeakSanitizer() { return true; }
-void DoIgnoreLeak(const void* ptr) { __lsan_ignore_object(ptr); }
-void RegisterLivePointers(const void* ptr, size_t size) {
-  __lsan_register_root_region(ptr, size);
-}
-void UnRegisterLivePointers(const void* ptr, size_t size) {
-  __lsan_unregister_root_region(ptr, size);
-}
-LeakCheckDisabler::LeakCheckDisabler() { __lsan_disable(); }
-LeakCheckDisabler::~LeakCheckDisabler() { __lsan_enable(); }
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // LEAK_SANITIZER
diff --git a/third_party/abseil/absl/debugging/leak_check.h b/third_party/abseil/absl/debugging/leak_check.h
deleted file mode 100644
index b66a81c..0000000
--- a/third_party/abseil/absl/debugging/leak_check.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: leak_check.h
-// -----------------------------------------------------------------------------
-//
-// This file contains functions that affect leak checking behavior within
-// targets built with the LeakSanitizer (LSan), a memory leak detector that is
-// integrated within the AddressSanitizer (ASan) as an additional component, or
-// which can be used standalone. LSan and ASan are included (or can be provided)
-// as additional components for most compilers such as Clang, gcc and MSVC.
-// Note: this leak checking API is not yet supported in MSVC.
-// Leak checking is enabled by default in all ASan builds.
-//
-// See https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer
-//
-// -----------------------------------------------------------------------------
-#ifndef ABSL_DEBUGGING_LEAK_CHECK_H_
-#define ABSL_DEBUGGING_LEAK_CHECK_H_
-
-#include <cstddef>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// HaveLeakSanitizer()
-//
-// Returns true if a leak-checking sanitizer (either ASan or standalone LSan) is
-// currently built into this target.
-bool HaveLeakSanitizer();
-
-// DoIgnoreLeak()
-//
-// Implements `IgnoreLeak()` below. This function should usually
-// not be called directly; calling `IgnoreLeak()` is preferred.
-void DoIgnoreLeak(const void* ptr);
-
-// IgnoreLeak()
-//
-// Instruct the leak sanitizer to ignore leak warnings on the object referenced
-// by the passed pointer, as well as all heap objects transitively referenced
-// by it. The passed object pointer can point to either the beginning of the
-// object or anywhere within it.
-//
-// Example:
-//
-//   static T* obj = IgnoreLeak(new T(...));
-//
-// If the passed `ptr` does not point to an actively allocated object at the
-// time `IgnoreLeak()` is called, the call is a no-op; if it is actively
-// allocated, leak sanitizer will assume this object is referenced even if
-// there is no actual reference in user memory.
-//
-template <typename T>
-T* IgnoreLeak(T* ptr) {
-  DoIgnoreLeak(ptr);
-  return ptr;
-}
-
-// LeakCheckDisabler
-//
-// This helper class indicates that any heap allocations done in the code block
-// covered by the scoped object, which should be allocated on the stack, will
-// not be reported as leaks. Leak check disabling will occur within the code
-// block and any nested function calls within the code block.
-//
-// Example:
-//
-//   void Foo() {
-//     LeakCheckDisabler disabler;
-//     ... code that allocates objects whose leaks should be ignored ...
-//   }
-//
-// REQUIRES: Destructor runs in same thread as constructor
-class LeakCheckDisabler {
- public:
-  LeakCheckDisabler();
-  LeakCheckDisabler(const LeakCheckDisabler&) = delete;
-  LeakCheckDisabler& operator=(const LeakCheckDisabler&) = delete;
-  ~LeakCheckDisabler();
-};
-
-// RegisterLivePointers()
-//
-// Registers `ptr[0,size-1]` as pointers to memory that is still actively being
-// referenced and for which leak checking should be ignored. This function is
-// useful if you store pointers in mapped memory, for memory ranges that we know
-// are correct but for which normal analysis would flag as leaked code.
-void RegisterLivePointers(const void* ptr, size_t size);
-
-// UnRegisterLivePointers()
-//
-// Deregisters the pointers previously marked as active in
-// `RegisterLivePointers()`, enabling leak checking of those pointers.
-void UnRegisterLivePointers(const void* ptr, size_t size);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_LEAK_CHECK_H_
diff --git a/third_party/abseil/absl/debugging/leak_check_disable.cc b/third_party/abseil/absl/debugging/leak_check_disable.cc
deleted file mode 100644
index 924d6e3..0000000
--- a/third_party/abseil/absl/debugging/leak_check_disable.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Disable LeakSanitizer when this file is linked in.
-// This function overrides __lsan_is_turned_off from sanitizer/lsan_interface.h
-extern "C" int __lsan_is_turned_off();
-extern "C" int __lsan_is_turned_off() {
-  return 1;
-}
diff --git a/third_party/abseil/absl/debugging/leak_check_fail_test.cc b/third_party/abseil/absl/debugging/leak_check_fail_test.cc
deleted file mode 100644
index c49b81a..0000000
--- a/third_party/abseil/absl/debugging/leak_check_fail_test.cc
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <memory>
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/debugging/leak_check.h"
-
-namespace {
-
-TEST(LeakCheckTest, LeakMemory) {
-  // This test is expected to cause lsan failures on program exit. Therefore the
-  // test will be run only by leak_check_test.sh, which will verify a
-  // failed exit code.
-
-  char* foo = strdup("lsan should complain about this leaked string");
-  ABSL_RAW_LOG(INFO, "Should detect leaked string %s", foo);
-}
-
-TEST(LeakCheckTest, LeakMemoryAfterDisablerScope) {
-  // This test is expected to cause lsan failures on program exit. Therefore the
-  // test will be run only by external_leak_check_test.sh, which will verify a
-  // failed exit code.
-  { absl::LeakCheckDisabler disabler; }
-  char* foo = strdup("lsan should also complain about this leaked string");
-  ABSL_RAW_LOG(INFO, "Re-enabled leak detection.Should detect leaked string %s",
-               foo);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/debugging/leak_check_test.cc b/third_party/abseil/absl/debugging/leak_check_test.cc
deleted file mode 100644
index b5cc487..0000000
--- a/third_party/abseil/absl/debugging/leak_check_test.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/debugging/leak_check.h"
-
-namespace {
-
-TEST(LeakCheckTest, DetectLeakSanitizer) {
-#ifdef ABSL_EXPECT_LEAK_SANITIZER
-  EXPECT_TRUE(absl::HaveLeakSanitizer());
-#else
-  EXPECT_FALSE(absl::HaveLeakSanitizer());
-#endif
-}
-
-TEST(LeakCheckTest, IgnoreLeakSuppressesLeakedMemoryErrors) {
-  auto foo = absl::IgnoreLeak(new std::string("some ignored leaked string"));
-  ABSL_RAW_LOG(INFO, "Ignoring leaked string %s", foo->c_str());
-}
-
-TEST(LeakCheckTest, LeakCheckDisablerIgnoresLeak) {
-  absl::LeakCheckDisabler disabler;
-  auto foo = new std::string("some string leaked while checks are disabled");
-  ABSL_RAW_LOG(INFO, "Ignoring leaked string %s", foo->c_str());
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/debugging/stacktrace.cc b/third_party/abseil/absl/debugging/stacktrace.cc
deleted file mode 100644
index 1f7c7d8..0000000
--- a/third_party/abseil/absl/debugging/stacktrace.cc
+++ /dev/null
@@ -1,140 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Produce stack trace.
-//
-// There are three different ways we can try to get the stack trace:
-//
-// 1) Our hand-coded stack-unwinder.  This depends on a certain stack
-//    layout, which is used by gcc (and those systems using a
-//    gcc-compatible ABI) on x86 systems, at least since gcc 2.95.
-//    It uses the frame pointer to do its work.
-//
-// 2) The libunwind library.  This is still in development, and as a
-//    separate library adds a new dependency, but doesn't need a frame
-//    pointer.  It also doesn't call malloc.
-//
-// 3) The gdb unwinder -- also the one used by the c++ exception code.
-//    It's obviously well-tested, but has a fatal flaw: it can call
-//    malloc() from the unwinder.  This is a problem because we're
-//    trying to use the unwinder to instrument malloc().
-//
-// Note: if you add a new implementation here, make sure it works
-// correctly when absl::GetStackTrace() is called with max_depth == 0.
-// Some code may do that.
-
-#include "absl/debugging/stacktrace.h"
-
-#include <atomic>
-
-#include "absl/base/attributes.h"
-#include "absl/base/port.h"
-#include "absl/debugging/internal/stacktrace_config.h"
-
-#if defined(ABSL_STACKTRACE_INL_HEADER)
-#include ABSL_STACKTRACE_INL_HEADER
-#else
-# error Cannot calculate stack trace: will need to write for your environment
-
-# include "absl/debugging/internal/stacktrace_aarch64-inl.inc"
-# include "absl/debugging/internal/stacktrace_arm-inl.inc"
-# include "absl/debugging/internal/stacktrace_generic-inl.inc"
-# include "absl/debugging/internal/stacktrace_powerpc-inl.inc"
-# include "absl/debugging/internal/stacktrace_unimplemented-inl.inc"
-# include "absl/debugging/internal/stacktrace_win32-inl.inc"
-# include "absl/debugging/internal/stacktrace_x86-inl.inc"
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-typedef int (*Unwinder)(void**, int*, int, int, const void*, int*);
-std::atomic<Unwinder> custom;
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-ABSL_ATTRIBUTE_ALWAYS_INLINE inline int Unwind(void** result, int* sizes,
-                                               int max_depth, int skip_count,
-                                               const void* uc,
-                                               int* min_dropped_frames) {
-  Unwinder f = &UnwindImpl<IS_STACK_FRAMES, IS_WITH_CONTEXT>;
-  Unwinder g = custom.load(std::memory_order_acquire);
-  if (g != nullptr) f = g;
-
-  // Add 1 to skip count for the unwinder function itself
-  int size = (*f)(result, sizes, max_depth, skip_count + 1, uc,
-                  min_dropped_frames);
-  // To disable tail call to (*f)(...)
-  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
-  return size;
-}
-
-}  // anonymous namespace
-
-ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int GetStackFrames(
-    void** result, int* sizes, int max_depth, int skip_count) {
-  return Unwind<true, false>(result, sizes, max_depth, skip_count, nullptr,
-                             nullptr);
-}
-
-ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
-GetStackFramesWithContext(void** result, int* sizes, int max_depth,
-                          int skip_count, const void* uc,
-                          int* min_dropped_frames) {
-  return Unwind<true, true>(result, sizes, max_depth, skip_count, uc,
-                            min_dropped_frames);
-}
-
-ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int GetStackTrace(
-    void** result, int max_depth, int skip_count) {
-  return Unwind<false, false>(result, nullptr, max_depth, skip_count, nullptr,
-                              nullptr);
-}
-
-ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL int
-GetStackTraceWithContext(void** result, int max_depth, int skip_count,
-                         const void* uc, int* min_dropped_frames) {
-  return Unwind<false, true>(result, nullptr, max_depth, skip_count, uc,
-                             min_dropped_frames);
-}
-
-void SetStackUnwinder(Unwinder w) {
-  custom.store(w, std::memory_order_release);
-}
-
-int DefaultStackUnwinder(void** pcs, int* sizes, int depth, int skip,
-                         const void* uc, int* min_dropped_frames) {
-  skip++;  // For this function
-  Unwinder f = nullptr;
-  if (sizes == nullptr) {
-    if (uc == nullptr) {
-      f = &UnwindImpl<false, false>;
-    } else {
-      f = &UnwindImpl<false, true>;
-    }
-  } else {
-    if (uc == nullptr) {
-      f = &UnwindImpl<true, false>;
-    } else {
-      f = &UnwindImpl<true, true>;
-    }
-  }
-  volatile int x = 0;
-  int n = (*f)(pcs, sizes, depth, skip, uc, min_dropped_frames);
-  x = 1; (void) x;  // To disable tail call to (*f)(...)
-  return n;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/stacktrace.h b/third_party/abseil/absl/debugging/stacktrace.h
deleted file mode 100644
index 0ec0ffd..0000000
--- a/third_party/abseil/absl/debugging/stacktrace.h
+++ /dev/null
@@ -1,231 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: stacktrace.h
-// -----------------------------------------------------------------------------
-//
-// This file contains routines to extract the current stack trace and associated
-// stack frames. These functions are thread-safe and async-signal-safe.
-//
-// Note that stack trace functionality is platform dependent and requires
-// additional support from the compiler/build system in most cases. (That is,
-// this functionality generally only works on platforms/builds that have been
-// specifically configured to support it.)
-//
-// Note: stack traces in Abseil that do not utilize a symbolizer will result in
-// frames consisting of function addresses rather than human-readable function
-// names. (See symbolize.h for information on symbolizing these values.)
-
-#ifndef ABSL_DEBUGGING_STACKTRACE_H_
-#define ABSL_DEBUGGING_STACKTRACE_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// GetStackFrames()
-//
-// Records program counter values for up to `max_depth` frames, skipping the
-// most recent `skip_count` stack frames, stores their corresponding values
-// and sizes in `results` and `sizes` buffers, and returns the number of frames
-// stored. (Note that the frame generated for the `absl::GetStackFrames()`
-// routine itself is also skipped.)
-//
-// Example:
-//
-//      main() { foo(); }
-//      foo() { bar(); }
-//      bar() {
-//        void* result[10];
-//        int sizes[10];
-//        int depth = absl::GetStackFrames(result, sizes, 10, 1);
-//      }
-//
-// The current stack frame would consist of three function calls: `bar()`,
-// `foo()`, and then `main()`; however, since the `GetStackFrames()` call sets
-// `skip_count` to `1`, it will skip the frame for `bar()`, the most recently
-// invoked function call. It will therefore return 2 and fill `result` with
-// program counters within the following functions:
-//
-//      result[0]       foo()
-//      result[1]       main()
-//
-// (Note: in practice, a few more entries after `main()` may be added to account
-// for startup processes.)
-//
-// Corresponding stack frame sizes will also be recorded:
-//
-//    sizes[0]       16
-//    sizes[1]       16
-//
-// (Stack frame sizes of `16` above are just for illustration purposes.)
-//
-// Stack frame sizes of 0 or less indicate that those frame sizes couldn't
-// be identified.
-//
-// This routine may return fewer stack frame entries than are
-// available. Also note that `result` and `sizes` must both be non-null.
-extern int GetStackFrames(void** result, int* sizes, int max_depth,
-                          int skip_count);
-
-// GetStackFramesWithContext()
-//
-// Records program counter values obtained from a signal handler. Records
-// program counter values for up to `max_depth` frames, skipping the most recent
-// `skip_count` stack frames, stores their corresponding values and sizes in
-// `results` and `sizes` buffers, and returns the number of frames stored. (Note
-// that the frame generated for the `absl::GetStackFramesWithContext()` routine
-// itself is also skipped.)
-//
-// The `uc` parameter, if non-null, should be a pointer to a `ucontext_t` value
-// passed to a signal handler registered via the `sa_sigaction` field of a
-// `sigaction` struct. (See
-// http://man7.org/linux/man-pages/man2/sigaction.2.html.) The `uc` value may
-// help a stack unwinder to provide a better stack trace under certain
-// conditions. `uc` may safely be null.
-//
-// The `min_dropped_frames` output parameter, if non-null, points to the
-// location to note any dropped stack frames, if any, due to buffer limitations
-// or other reasons. (This value will be set to `0` if no frames were dropped.)
-// The number of total stack frames is guaranteed to be >= skip_count +
-// max_depth + *min_dropped_frames.
-extern int GetStackFramesWithContext(void** result, int* sizes, int max_depth,
-                                     int skip_count, const void* uc,
-                                     int* min_dropped_frames);
-
-// GetStackTrace()
-//
-// Records program counter values for up to `max_depth` frames, skipping the
-// most recent `skip_count` stack frames, stores their corresponding values
-// in `results`, and returns the number of frames
-// stored. Note that this function is similar to `absl::GetStackFrames()`
-// except that it returns the stack trace only, and not stack frame sizes.
-//
-// Example:
-//
-//      main() { foo(); }
-//      foo() { bar(); }
-//      bar() {
-//        void* result[10];
-//        int depth = absl::GetStackTrace(result, 10, 1);
-//      }
-//
-// This produces:
-//
-//      result[0]       foo
-//      result[1]       main
-//           ....       ...
-//
-// `result` must not be null.
-extern int GetStackTrace(void** result, int max_depth, int skip_count);
-
-// GetStackTraceWithContext()
-//
-// Records program counter values obtained from a signal handler. Records
-// program counter values for up to `max_depth` frames, skipping the most recent
-// `skip_count` stack frames, stores their corresponding values in `results`,
-// and returns the number of frames stored. (Note that the frame generated for
-// the `absl::GetStackFramesWithContext()` routine itself is also skipped.)
-//
-// The `uc` parameter, if non-null, should be a pointer to a `ucontext_t` value
-// passed to a signal handler registered via the `sa_sigaction` field of a
-// `sigaction` struct. (See
-// http://man7.org/linux/man-pages/man2/sigaction.2.html.) The `uc` value may
-// help a stack unwinder to provide a better stack trace under certain
-// conditions. `uc` may safely be null.
-//
-// The `min_dropped_frames` output parameter, if non-null, points to the
-// location to note any dropped stack frames, if any, due to buffer limitations
-// or other reasons. (This value will be set to `0` if no frames were dropped.)
-// The number of total stack frames is guaranteed to be >= skip_count +
-// max_depth + *min_dropped_frames.
-extern int GetStackTraceWithContext(void** result, int max_depth,
-                                    int skip_count, const void* uc,
-                                    int* min_dropped_frames);
-
-// SetStackUnwinder()
-//
-// Provides a custom function for unwinding stack frames that will be used in
-// place of the default stack unwinder when invoking the static
-// GetStack{Frames,Trace}{,WithContext}() functions above.
-//
-// The arguments passed to the unwinder function will match the
-// arguments passed to `absl::GetStackFramesWithContext()` except that sizes
-// will be non-null iff the caller is interested in frame sizes.
-//
-// If unwinder is set to null, we revert to the default stack-tracing behavior.
-//
-// *****************************************************************************
-// WARNING
-// *****************************************************************************
-//
-// absl::SetStackUnwinder is not suitable for general purpose use.  It is
-// provided for custom runtimes.
-// Some things to watch out for when calling `absl::SetStackUnwinder()`:
-//
-// (a) The unwinder may be called from within signal handlers and
-// therefore must be async-signal-safe.
-//
-// (b) Even after a custom stack unwinder has been unregistered, other
-// threads may still be in the process of using that unwinder.
-// Therefore do not clean up any state that may be needed by an old
-// unwinder.
-// *****************************************************************************
-extern void SetStackUnwinder(int (*unwinder)(void** pcs, int* sizes,
-                                             int max_depth, int skip_count,
-                                             const void* uc,
-                                             int* min_dropped_frames));
-
-// DefaultStackUnwinder()
-//
-// Records program counter values of up to `max_depth` frames, skipping the most
-// recent `skip_count` stack frames, and stores their corresponding values in
-// `pcs`. (Note that the frame generated for this call itself is also skipped.)
-// This function acts as a generic stack-unwinder; prefer usage of the more
-// specific `GetStack{Trace,Frames}{,WithContext}()` functions above.
-//
-// If you have set your own stack unwinder (with the `SetStackUnwinder()`
-// function above, you can still get the default stack unwinder by calling
-// `DefaultStackUnwinder()`, which will ignore any previously set stack unwinder
-// and use the default one instead.
-//
-// Because this function is generic, only `pcs` is guaranteed to be non-null
-// upon return. It is legal for `sizes`, `uc`, and `min_dropped_frames` to all
-// be null when called.
-//
-// The semantics are the same as the corresponding `GetStack*()` function in the
-// case where `absl::SetStackUnwinder()` was never called. Equivalents are:
-//
-//                       null sizes         |        non-nullptr sizes
-//             |==========================================================|
-//     null uc | GetStackTrace()            | GetStackFrames()            |
-// non-null uc | GetStackTraceWithContext() | GetStackFramesWithContext() |
-//             |==========================================================|
-extern int DefaultStackUnwinder(void** pcs, int* sizes, int max_depth,
-                                int skip_count, const void* uc,
-                                int* min_dropped_frames);
-
-namespace debugging_internal {
-// Returns true for platforms which are expected to have functioning stack trace
-// implementations. Intended to be used for tests which want to exclude
-// verification of logic known to be broken because stack traces are not
-// working.
-extern bool StackTraceWorksForTest();
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_STACKTRACE_H_
diff --git a/third_party/abseil/absl/debugging/symbolize.cc b/third_party/abseil/absl/debugging/symbolize.cc
deleted file mode 100644
index 5e4a25d..0000000
--- a/third_party/abseil/absl/debugging/symbolize.cc
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/debugging/symbolize.h"
-
-#ifdef _WIN32
-#include <winapifamily.h>
-#if !(WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)) || \
-    WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-// UWP doesn't have access to win32 APIs.
-#define ABSL_INTERNAL_HAVE_SYMBOLIZE_WIN32
-#endif
-#endif
-
-#if defined(ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE)
-#include "absl/debugging/symbolize_elf.inc"
-#elif defined(ABSL_INTERNAL_HAVE_SYMBOLIZE_WIN32)
-// The Windows Symbolizer only works if PDB files containing the debug info
-// are available to the program at runtime.
-#include "absl/debugging/symbolize_win32.inc"
-#elif defined(__APPLE__)
-#include "absl/debugging/symbolize_darwin.inc"
-#else
-#include "absl/debugging/symbolize_unimplemented.inc"
-#endif
diff --git a/third_party/abseil/absl/debugging/symbolize.h b/third_party/abseil/absl/debugging/symbolize.h
deleted file mode 100644
index 43d93a8..0000000
--- a/third_party/abseil/absl/debugging/symbolize.h
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: symbolize.h
-// -----------------------------------------------------------------------------
-//
-// This file configures the Abseil symbolizer for use in converting instruction
-// pointer addresses (program counters) into human-readable names (function
-// calls, etc.) within Abseil code.
-//
-// The symbolizer may be invoked from several sources:
-//
-//   * Implicitly, through the installation of an Abseil failure signal handler.
-//     (See failure_signal_handler.h for more information.)
-//   * By calling `Symbolize()` directly on a program counter you obtain through
-//     `absl::GetStackTrace()` or `absl::GetStackFrames()`. (See stacktrace.h
-//     for more information.
-//   * By calling `Symbolize()` directly on a program counter you obtain through
-//     other means (which would be platform-dependent).
-//
-// In all of the above cases, the symbolizer must first be initialized before
-// any program counter values can be symbolized. If you are installing a failure
-// signal handler, initialize the symbolizer before you do so.
-//
-// Example:
-//
-//   int main(int argc, char** argv) {
-//     // Initialize the Symbolizer before installing the failure signal handler
-//     absl::InitializeSymbolizer(argv[0]);
-//
-//     // Now you may install the failure signal handler
-//     absl::FailureSignalHandlerOptions options;
-//     absl::InstallFailureSignalHandler(options);
-//
-//     // Start running your main program
-//     ...
-//     return 0;
-//  }
-//
-#ifndef ABSL_DEBUGGING_SYMBOLIZE_H_
-#define ABSL_DEBUGGING_SYMBOLIZE_H_
-
-#include "absl/debugging/internal/symbolize.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// InitializeSymbolizer()
-//
-// Initializes the program counter symbolizer, given the path of the program
-// (typically obtained through `main()`s `argv[0]`). The Abseil symbolizer
-// allows you to read program counters (instruction pointer values) using their
-// human-readable names within output such as stack traces.
-//
-// Example:
-//
-// int main(int argc, char *argv[]) {
-//   absl::InitializeSymbolizer(argv[0]);
-//   // Now you can use the symbolizer
-// }
-void InitializeSymbolizer(const char* argv0);
-//
-// Symbolize()
-//
-// Symbolizes a program counter (instruction pointer value) `pc` and, on
-// success, writes the name to `out`. The symbol name is demangled, if possible.
-// Note that the symbolized name may be truncated and will be NUL-terminated.
-// Demangling is supported for symbols generated by GCC 3.x or newer). Returns
-// `false` on failure.
-//
-// Example:
-//
-//   // Print a program counter and its symbol name.
-//   static void DumpPCAndSymbol(void *pc) {
-//     char tmp[1024];
-//     const char *symbol = "(unknown)";
-//     if (absl::Symbolize(pc, tmp, sizeof(tmp))) {
-//       symbol = tmp;
-//     }
-//     absl::PrintF("%p  %s\n", pc, symbol);
-//  }
-bool Symbolize(const void *pc, char *out, int out_size);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_SYMBOLIZE_H_
diff --git a/third_party/abseil/absl/debugging/symbolize_darwin.inc b/third_party/abseil/absl/debugging/symbolize_darwin.inc
deleted file mode 100644
index 443ce9e..0000000
--- a/third_party/abseil/absl/debugging/symbolize_darwin.inc
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cxxabi.h>
-#include <execinfo.h>
-
-#include <algorithm>
-#include <cstring>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/debugging/internal/demangle.h"
-#include "absl/strings/numbers.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-void InitializeSymbolizer(const char*) {}
-
-namespace debugging_internal {
-namespace {
-
-static std::string GetSymbolString(absl::string_view backtrace_line) {
-  // Example Backtrace lines:
-  // 0   libimaging_shared.dylib             0x018c152a
-  // _ZNSt11_Deque_baseIN3nik7mediadb4PageESaIS2_EE17_M_initialize_mapEm + 3478
-  //
-  // or
-  // 0   libimaging_shared.dylib             0x0000000001895c39
-  // _ZN3nik4util19register_shared_ptrINS_3gpu7TextureEEEvPKvS5_ + 39
-  //
-  // or
-  // 0   mysterious_app                      0x0124000120120009 main + 17
-  auto address_pos = backtrace_line.find(" 0x");
-  if (address_pos == absl::string_view::npos) return std::string();
-  absl::string_view symbol_view = backtrace_line.substr(address_pos + 1);
-
-  auto space_pos = symbol_view.find(" ");
-  if (space_pos == absl::string_view::npos) return std::string();
-  symbol_view = symbol_view.substr(space_pos + 1);  // to mangled symbol
-
-  auto plus_pos = symbol_view.find(" + ");
-  if (plus_pos == absl::string_view::npos) return std::string();
-  symbol_view = symbol_view.substr(0, plus_pos);  // strip remainng
-
-  return std::string(symbol_view);
-}
-
-}  // namespace
-}  // namespace debugging_internal
-
-bool Symbolize(const void* pc, char* out, int out_size) {
-  if (out_size <= 0 || pc == nullptr) {
-    out = nullptr;
-    return false;
-  }
-
-  // This allocates a char* array.
-  char** frame_strings = backtrace_symbols(const_cast<void**>(&pc), 1);
-
-  if (frame_strings == nullptr) return false;
-
-  std::string symbol = debugging_internal::GetSymbolString(frame_strings[0]);
-  free(frame_strings);
-
-  char tmp_buf[1024];
-  if (debugging_internal::Demangle(symbol.c_str(), tmp_buf, sizeof(tmp_buf))) {
-    size_t len = strlen(tmp_buf);
-    if (len + 1 <= static_cast<size_t>(out_size)) {  // +1 for '\0'
-      assert(len < sizeof(tmp_buf));
-      memmove(out, tmp_buf, len + 1);
-    }
-  } else {
-    strncpy(out, symbol.c_str(), out_size);
-  }
-
-  if (out[out_size - 1] != '\0') {
-    // strncpy() does not '\0' terminate when it truncates.
-    static constexpr char kEllipsis[] = "...";
-    int ellipsis_size = std::min<int>(sizeof(kEllipsis) - 1, out_size - 1);
-    memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
-    out[out_size - 1] = '\0';
-  }
-
-  return true;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/symbolize_elf.inc b/third_party/abseil/absl/debugging/symbolize_elf.inc
deleted file mode 100644
index f4d5727..0000000
--- a/third_party/abseil/absl/debugging/symbolize_elf.inc
+++ /dev/null
@@ -1,1560 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This library provides Symbolize() function that symbolizes program
-// counters to their corresponding symbol names on linux platforms.
-// This library has a minimal implementation of an ELF symbol table
-// reader (i.e. it doesn't depend on libelf, etc.).
-//
-// The algorithm used in Symbolize() is as follows.
-//
-//   1. Go through a list of maps in /proc/self/maps and find the map
-//   containing the program counter.
-//
-//   2. Open the mapped file and find a regular symbol table inside.
-//   Iterate over symbols in the symbol table and look for the symbol
-//   containing the program counter.  If such a symbol is found,
-//   obtain the symbol name, and demangle the symbol if possible.
-//   If the symbol isn't found in the regular symbol table (binary is
-//   stripped), try the same thing with a dynamic symbol table.
-//
-// Note that Symbolize() is originally implemented to be used in
-// signal handlers, hence it doesn't use malloc() and other unsafe
-// operations.  It should be both thread-safe and async-signal-safe.
-//
-// Implementation note:
-//
-// We don't use heaps but only use stacks.  We want to reduce the
-// stack consumption so that the symbolizer can run on small stacks.
-//
-// Here are some numbers collected with GCC 4.1.0 on x86:
-// - sizeof(Elf32_Sym)  = 16
-// - sizeof(Elf32_Shdr) = 40
-// - sizeof(Elf64_Sym)  = 24
-// - sizeof(Elf64_Shdr) = 64
-//
-// This implementation is intended to be async-signal-safe but uses some
-// functions which are not guaranteed to be so, such as memchr() and
-// memmove().  We assume they are async-signal-safe.
-
-#include <dlfcn.h>
-#include <elf.h>
-#include <fcntl.h>
-#include <link.h>  // For ElfW() macro.
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <array>
-#include <atomic>
-#include <cerrno>
-#include <cinttypes>
-#include <climits>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-
-#include "absl/base/casts.h"
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/low_level_alloc.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/port.h"
-#include "absl/debugging/internal/demangle.h"
-#include "absl/debugging/internal/vdso_support.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Value of argv[0]. Used by MaybeInitializeObjFile().
-static char *argv0_value = nullptr;
-
-void InitializeSymbolizer(const char *argv0) {
-#ifdef ABSL_HAVE_VDSO_SUPPORT
-  // We need to make sure VDSOSupport::Init() is called before any setuid or
-  // chroot calls, so InitializeSymbolizer() should be called very early in the
-  // life of a program.
-  absl::debugging_internal::VDSOSupport::Init();
-#endif
-  if (argv0_value != nullptr) {
-    free(argv0_value);
-    argv0_value = nullptr;
-  }
-  if (argv0 != nullptr && argv0[0] != '\0') {
-    argv0_value = strdup(argv0);
-  }
-}
-
-namespace debugging_internal {
-namespace {
-
-// Re-runs fn until it doesn't cause EINTR.
-#define NO_INTR(fn) \
-  do {              \
-  } while ((fn) < 0 && errno == EINTR)
-
-// On Linux, ELF_ST_* are defined in <linux/elf.h>.  To make this portable
-// we define our own ELF_ST_BIND and ELF_ST_TYPE if not available.
-#ifndef ELF_ST_BIND
-#define ELF_ST_BIND(info) (((unsigned char)(info)) >> 4)
-#endif
-
-#ifndef ELF_ST_TYPE
-#define ELF_ST_TYPE(info) (((unsigned char)(info)) & 0xF)
-#endif
-
-// Some platforms use a special .opd section to store function pointers.
-const char kOpdSectionName[] = ".opd";
-
-#if (defined(__powerpc__) && !(_CALL_ELF > 1)) || defined(__ia64)
-// Use opd section for function descriptors on these platforms, the function
-// address is the first word of the descriptor.
-enum { kPlatformUsesOPDSections = 1 };
-#else  // not PPC or IA64
-enum { kPlatformUsesOPDSections = 0 };
-#endif
-
-// This works for PowerPC & IA64 only.  A function descriptor consist of two
-// pointers and the first one is the function's entry.
-const size_t kFunctionDescriptorSize = sizeof(void *) * 2;
-
-const int kMaxDecorators = 10;  // Seems like a reasonable upper limit.
-
-struct InstalledSymbolDecorator {
-  SymbolDecorator fn;
-  void *arg;
-  int ticket;
-};
-
-int g_num_decorators;
-InstalledSymbolDecorator g_decorators[kMaxDecorators];
-
-struct FileMappingHint {
-  const void *start;
-  const void *end;
-  uint64_t offset;
-  const char *filename;
-};
-
-// Protects g_decorators.
-// We are using SpinLock and not a Mutex here, because we may be called
-// from inside Mutex::Lock itself, and it prohibits recursive calls.
-// This happens in e.g. base/stacktrace_syscall_unittest.
-// Moreover, we are using only TryLock(), if the decorator list
-// is being modified (is busy), we skip all decorators, and possibly
-// loose some info. Sorry, that's the best we could do.
-ABSL_CONST_INIT absl::base_internal::SpinLock g_decorators_mu(
-    absl::kConstInit, absl::base_internal::SCHEDULE_KERNEL_ONLY);
-
-const int kMaxFileMappingHints = 8;
-int g_num_file_mapping_hints;
-FileMappingHint g_file_mapping_hints[kMaxFileMappingHints];
-// Protects g_file_mapping_hints.
-ABSL_CONST_INIT absl::base_internal::SpinLock g_file_mapping_mu(
-    absl::kConstInit, absl::base_internal::SCHEDULE_KERNEL_ONLY);
-
-// Async-signal-safe function to zero a buffer.
-// memset() is not guaranteed to be async-signal-safe.
-static void SafeMemZero(void* p, size_t size) {
-  unsigned char *c = static_cast<unsigned char *>(p);
-  while (size--) {
-    *c++ = 0;
-  }
-}
-
-struct ObjFile {
-  ObjFile()
-      : filename(nullptr),
-        start_addr(nullptr),
-        end_addr(nullptr),
-        offset(0),
-        fd(-1),
-        elf_type(-1) {
-    SafeMemZero(&elf_header, sizeof(elf_header));
-    SafeMemZero(&phdr[0], sizeof(phdr));
-  }
-
-  char *filename;
-  const void *start_addr;
-  const void *end_addr;
-  uint64_t offset;
-
-  // The following fields are initialized on the first access to the
-  // object file.
-  int fd;
-  int elf_type;
-  ElfW(Ehdr) elf_header;
-
-  // PT_LOAD program header describing executable code.
-  // Normally we expect just one, but SWIFT binaries have two.
-  std::array<ElfW(Phdr), 2> phdr;
-};
-
-// Build 4-way associative cache for symbols. Within each cache line, symbols
-// are replaced in LRU order.
-enum {
-  ASSOCIATIVITY = 4,
-};
-struct SymbolCacheLine {
-  const void *pc[ASSOCIATIVITY];
-  char *name[ASSOCIATIVITY];
-
-  // age[i] is incremented when a line is accessed. it's reset to zero if the
-  // i'th entry is read.
-  uint32_t age[ASSOCIATIVITY];
-};
-
-// ---------------------------------------------------------------
-// An async-signal-safe arena for LowLevelAlloc
-static std::atomic<base_internal::LowLevelAlloc::Arena *> g_sig_safe_arena;
-
-static base_internal::LowLevelAlloc::Arena *SigSafeArena() {
-  return g_sig_safe_arena.load(std::memory_order_acquire);
-}
-
-static void InitSigSafeArena() {
-  if (SigSafeArena() == nullptr) {
-    base_internal::LowLevelAlloc::Arena *new_arena =
-        base_internal::LowLevelAlloc::NewArena(
-            base_internal::LowLevelAlloc::kAsyncSignalSafe);
-    base_internal::LowLevelAlloc::Arena *old_value = nullptr;
-    if (!g_sig_safe_arena.compare_exchange_strong(old_value, new_arena,
-                                                  std::memory_order_release,
-                                                  std::memory_order_relaxed)) {
-      // We lost a race to allocate an arena; deallocate.
-      base_internal::LowLevelAlloc::DeleteArena(new_arena);
-    }
-  }
-}
-
-// ---------------------------------------------------------------
-// An AddrMap is a vector of ObjFile, using SigSafeArena() for allocation.
-
-class AddrMap {
- public:
-  AddrMap() : size_(0), allocated_(0), obj_(nullptr) {}
-  ~AddrMap() { base_internal::LowLevelAlloc::Free(obj_); }
-  int Size() const { return size_; }
-  ObjFile *At(int i) { return &obj_[i]; }
-  ObjFile *Add();
-  void Clear();
-
- private:
-  int size_;       // count of valid elements (<= allocated_)
-  int allocated_;  // count of allocated elements
-  ObjFile *obj_;   // array of allocated_ elements
-  AddrMap(const AddrMap &) = delete;
-  AddrMap &operator=(const AddrMap &) = delete;
-};
-
-void AddrMap::Clear() {
-  for (int i = 0; i != size_; i++) {
-    At(i)->~ObjFile();
-  }
-  size_ = 0;
-}
-
-ObjFile *AddrMap::Add() {
-  if (size_ == allocated_) {
-    int new_allocated = allocated_ * 2 + 50;
-    ObjFile *new_obj_ =
-        static_cast<ObjFile *>(base_internal::LowLevelAlloc::AllocWithArena(
-            new_allocated * sizeof(*new_obj_), SigSafeArena()));
-    if (obj_) {
-      memcpy(new_obj_, obj_, allocated_ * sizeof(*new_obj_));
-      base_internal::LowLevelAlloc::Free(obj_);
-    }
-    obj_ = new_obj_;
-    allocated_ = new_allocated;
-  }
-  return new (&obj_[size_++]) ObjFile;
-}
-
-// ---------------------------------------------------------------
-
-enum FindSymbolResult { SYMBOL_NOT_FOUND = 1, SYMBOL_TRUNCATED, SYMBOL_FOUND };
-
-class Symbolizer {
- public:
-  Symbolizer();
-  ~Symbolizer();
-  const char *GetSymbol(const void *const pc);
-
- private:
-  char *CopyString(const char *s) {
-    int len = strlen(s);
-    char *dst = static_cast<char *>(
-        base_internal::LowLevelAlloc::AllocWithArena(len + 1, SigSafeArena()));
-    ABSL_RAW_CHECK(dst != nullptr, "out of memory");
-    memcpy(dst, s, len + 1);
-    return dst;
-  }
-  ObjFile *FindObjFile(const void *const start,
-                       size_t size) ABSL_ATTRIBUTE_NOINLINE;
-  static bool RegisterObjFile(const char *filename,
-                              const void *const start_addr,
-                              const void *const end_addr, uint64_t offset,
-                              void *arg);
-  SymbolCacheLine *GetCacheLine(const void *const pc);
-  const char *FindSymbolInCache(const void *const pc);
-  const char *InsertSymbolInCache(const void *const pc, const char *name);
-  void AgeSymbols(SymbolCacheLine *line);
-  void ClearAddrMap();
-  FindSymbolResult GetSymbolFromObjectFile(const ObjFile &obj,
-                                           const void *const pc,
-                                           const ptrdiff_t relocation,
-                                           char *out, int out_size,
-                                           char *tmp_buf, int tmp_buf_size);
-
-  enum {
-    SYMBOL_BUF_SIZE = 3072,
-    TMP_BUF_SIZE = 1024,
-    SYMBOL_CACHE_LINES = 128,
-  };
-
-  AddrMap addr_map_;
-
-  bool ok_;
-  bool addr_map_read_;
-
-  char symbol_buf_[SYMBOL_BUF_SIZE];
-
-  // tmp_buf_ will be used to store arrays of ElfW(Shdr) and ElfW(Sym)
-  // so we ensure that tmp_buf_ is properly aligned to store either.
-  alignas(16) char tmp_buf_[TMP_BUF_SIZE];
-  static_assert(alignof(ElfW(Shdr)) <= 16,
-                "alignment of tmp buf too small for Shdr");
-  static_assert(alignof(ElfW(Sym)) <= 16,
-                "alignment of tmp buf too small for Sym");
-
-  SymbolCacheLine symbol_cache_[SYMBOL_CACHE_LINES];
-};
-
-static std::atomic<Symbolizer *> g_cached_symbolizer;
-
-}  // namespace
-
-static int SymbolizerSize() {
-#if defined(__wasm__) || defined(__asmjs__)
-  int pagesize = getpagesize();
-#else
-  int pagesize = sysconf(_SC_PAGESIZE);
-#endif
-  return ((sizeof(Symbolizer) - 1) / pagesize + 1) * pagesize;
-}
-
-// Return (and set null) g_cached_symbolized_state if it is not null.
-// Otherwise return a new symbolizer.
-static Symbolizer *AllocateSymbolizer() {
-  InitSigSafeArena();
-  Symbolizer *symbolizer =
-      g_cached_symbolizer.exchange(nullptr, std::memory_order_acquire);
-  if (symbolizer != nullptr) {
-    return symbolizer;
-  }
-  return new (base_internal::LowLevelAlloc::AllocWithArena(
-      SymbolizerSize(), SigSafeArena())) Symbolizer();
-}
-
-// Set g_cached_symbolize_state to s if it is null, otherwise
-// delete s.
-static void FreeSymbolizer(Symbolizer *s) {
-  Symbolizer *old_cached_symbolizer = nullptr;
-  if (!g_cached_symbolizer.compare_exchange_strong(old_cached_symbolizer, s,
-                                                   std::memory_order_release,
-                                                   std::memory_order_relaxed)) {
-    s->~Symbolizer();
-    base_internal::LowLevelAlloc::Free(s);
-  }
-}
-
-Symbolizer::Symbolizer() : ok_(true), addr_map_read_(false) {
-  for (SymbolCacheLine &symbol_cache_line : symbol_cache_) {
-    for (size_t j = 0; j < ABSL_ARRAYSIZE(symbol_cache_line.name); ++j) {
-      symbol_cache_line.pc[j] = nullptr;
-      symbol_cache_line.name[j] = nullptr;
-      symbol_cache_line.age[j] = 0;
-    }
-  }
-}
-
-Symbolizer::~Symbolizer() {
-  for (SymbolCacheLine &symbol_cache_line : symbol_cache_) {
-    for (char *s : symbol_cache_line.name) {
-      base_internal::LowLevelAlloc::Free(s);
-    }
-  }
-  ClearAddrMap();
-}
-
-// We don't use assert() since it's not guaranteed to be
-// async-signal-safe.  Instead we define a minimal assertion
-// macro. So far, we don't need pretty printing for __FILE__, etc.
-#define SAFE_ASSERT(expr) ((expr) ? static_cast<void>(0) : abort())
-
-// Read up to "count" bytes from file descriptor "fd" into the buffer
-// starting at "buf" while handling short reads and EINTR.  On
-// success, return the number of bytes read.  Otherwise, return -1.
-static ssize_t ReadPersistent(int fd, void *buf, size_t count) {
-  SAFE_ASSERT(fd >= 0);
-  SAFE_ASSERT(count <= SSIZE_MAX);
-  char *buf0 = reinterpret_cast<char *>(buf);
-  size_t num_bytes = 0;
-  while (num_bytes < count) {
-    ssize_t len;
-    NO_INTR(len = read(fd, buf0 + num_bytes, count - num_bytes));
-    if (len < 0) {  // There was an error other than EINTR.
-      ABSL_RAW_LOG(WARNING, "read failed: errno=%d", errno);
-      return -1;
-    }
-    if (len == 0) {  // Reached EOF.
-      break;
-    }
-    num_bytes += len;
-  }
-  SAFE_ASSERT(num_bytes <= count);
-  return static_cast<ssize_t>(num_bytes);
-}
-
-// Read up to "count" bytes from "offset" in the file pointed by file
-// descriptor "fd" into the buffer starting at "buf".  On success,
-// return the number of bytes read.  Otherwise, return -1.
-static ssize_t ReadFromOffset(const int fd, void *buf, const size_t count,
-                              const off_t offset) {
-  off_t off = lseek(fd, offset, SEEK_SET);
-  if (off == (off_t)-1) {
-    ABSL_RAW_LOG(WARNING, "lseek(%d, %ju, SEEK_SET) failed: errno=%d", fd,
-                 static_cast<uintmax_t>(offset), errno);
-    return -1;
-  }
-  return ReadPersistent(fd, buf, count);
-}
-
-// Try reading exactly "count" bytes from "offset" bytes in a file
-// pointed by "fd" into the buffer starting at "buf" while handling
-// short reads and EINTR.  On success, return true. Otherwise, return
-// false.
-static bool ReadFromOffsetExact(const int fd, void *buf, const size_t count,
-                                const off_t offset) {
-  ssize_t len = ReadFromOffset(fd, buf, count, offset);
-  return len >= 0 && static_cast<size_t>(len) == count;
-}
-
-// Returns elf_header.e_type if the file pointed by fd is an ELF binary.
-static int FileGetElfType(const int fd) {
-  ElfW(Ehdr) elf_header;
-  if (!ReadFromOffsetExact(fd, &elf_header, sizeof(elf_header), 0)) {
-    return -1;
-  }
-  if (memcmp(elf_header.e_ident, ELFMAG, SELFMAG) != 0) {
-    return -1;
-  }
-  return elf_header.e_type;
-}
-
-// Read the section headers in the given ELF binary, and if a section
-// of the specified type is found, set the output to this section header
-// and return true.  Otherwise, return false.
-// To keep stack consumption low, we would like this function to not get
-// inlined.
-static ABSL_ATTRIBUTE_NOINLINE bool GetSectionHeaderByType(
-    const int fd, ElfW(Half) sh_num, const off_t sh_offset, ElfW(Word) type,
-    ElfW(Shdr) * out, char *tmp_buf, int tmp_buf_size) {
-  ElfW(Shdr) *buf = reinterpret_cast<ElfW(Shdr) *>(tmp_buf);
-  const int buf_entries = tmp_buf_size / sizeof(buf[0]);
-  const int buf_bytes = buf_entries * sizeof(buf[0]);
-
-  for (int i = 0; i < sh_num;) {
-    const ssize_t num_bytes_left = (sh_num - i) * sizeof(buf[0]);
-    const ssize_t num_bytes_to_read =
-        (buf_bytes > num_bytes_left) ? num_bytes_left : buf_bytes;
-    const off_t offset = sh_offset + i * sizeof(buf[0]);
-    const ssize_t len = ReadFromOffset(fd, buf, num_bytes_to_read, offset);
-    if (len % sizeof(buf[0]) != 0) {
-      ABSL_RAW_LOG(
-          WARNING,
-          "Reading %zd bytes from offset %ju returned %zd which is not a "
-          "multiple of %zu.",
-          num_bytes_to_read, static_cast<uintmax_t>(offset), len,
-          sizeof(buf[0]));
-      return false;
-    }
-    const ssize_t num_headers_in_buf = len / sizeof(buf[0]);
-    SAFE_ASSERT(num_headers_in_buf <= buf_entries);
-    for (int j = 0; j < num_headers_in_buf; ++j) {
-      if (buf[j].sh_type == type) {
-        *out = buf[j];
-        return true;
-      }
-    }
-    i += num_headers_in_buf;
-  }
-  return false;
-}
-
-// There is no particular reason to limit section name to 63 characters,
-// but there has (as yet) been no need for anything longer either.
-const int kMaxSectionNameLen = 64;
-
-bool ForEachSection(int fd,
-                    const std::function<bool(absl::string_view name,
-                                             const ElfW(Shdr) &)> &callback) {
-  ElfW(Ehdr) elf_header;
-  if (!ReadFromOffsetExact(fd, &elf_header, sizeof(elf_header), 0)) {
-    return false;
-  }
-
-  ElfW(Shdr) shstrtab;
-  off_t shstrtab_offset =
-      (elf_header.e_shoff + elf_header.e_shentsize * elf_header.e_shstrndx);
-  if (!ReadFromOffsetExact(fd, &shstrtab, sizeof(shstrtab), shstrtab_offset)) {
-    return false;
-  }
-
-  for (int i = 0; i < elf_header.e_shnum; ++i) {
-    ElfW(Shdr) out;
-    off_t section_header_offset =
-        (elf_header.e_shoff + elf_header.e_shentsize * i);
-    if (!ReadFromOffsetExact(fd, &out, sizeof(out), section_header_offset)) {
-      return false;
-    }
-    off_t name_offset = shstrtab.sh_offset + out.sh_name;
-    char header_name[kMaxSectionNameLen];
-    ssize_t n_read =
-        ReadFromOffset(fd, &header_name, kMaxSectionNameLen, name_offset);
-    if (n_read == -1) {
-      return false;
-    } else if (n_read > kMaxSectionNameLen) {
-      // Long read?
-      return false;
-    }
-
-    absl::string_view name(header_name, strnlen(header_name, n_read));
-    if (!callback(name, out)) {
-      break;
-    }
-  }
-  return true;
-}
-
-// name_len should include terminating '\0'.
-bool GetSectionHeaderByName(int fd, const char *name, size_t name_len,
-                            ElfW(Shdr) * out) {
-  char header_name[kMaxSectionNameLen];
-  if (sizeof(header_name) < name_len) {
-    ABSL_RAW_LOG(WARNING,
-                 "Section name '%s' is too long (%zu); "
-                 "section will not be found (even if present).",
-                 name, name_len);
-    // No point in even trying.
-    return false;
-  }
-
-  ElfW(Ehdr) elf_header;
-  if (!ReadFromOffsetExact(fd, &elf_header, sizeof(elf_header), 0)) {
-    return false;
-  }
-
-  ElfW(Shdr) shstrtab;
-  off_t shstrtab_offset =
-      (elf_header.e_shoff + elf_header.e_shentsize * elf_header.e_shstrndx);
-  if (!ReadFromOffsetExact(fd, &shstrtab, sizeof(shstrtab), shstrtab_offset)) {
-    return false;
-  }
-
-  for (int i = 0; i < elf_header.e_shnum; ++i) {
-    off_t section_header_offset =
-        (elf_header.e_shoff + elf_header.e_shentsize * i);
-    if (!ReadFromOffsetExact(fd, out, sizeof(*out), section_header_offset)) {
-      return false;
-    }
-    off_t name_offset = shstrtab.sh_offset + out->sh_name;
-    ssize_t n_read = ReadFromOffset(fd, &header_name, name_len, name_offset);
-    if (n_read < 0) {
-      return false;
-    } else if (static_cast<size_t>(n_read) != name_len) {
-      // Short read -- name could be at end of file.
-      continue;
-    }
-    if (memcmp(header_name, name, name_len) == 0) {
-      return true;
-    }
-  }
-  return false;
-}
-
-// Compare symbols at in the same address.
-// Return true if we should pick symbol1.
-static bool ShouldPickFirstSymbol(const ElfW(Sym) & symbol1,
-                                  const ElfW(Sym) & symbol2) {
-  // If one of the symbols is weak and the other is not, pick the one
-  // this is not a weak symbol.
-  char bind1 = ELF_ST_BIND(symbol1.st_info);
-  char bind2 = ELF_ST_BIND(symbol1.st_info);
-  if (bind1 == STB_WEAK && bind2 != STB_WEAK) return false;
-  if (bind2 == STB_WEAK && bind1 != STB_WEAK) return true;
-
-  // If one of the symbols has zero size and the other is not, pick the
-  // one that has non-zero size.
-  if (symbol1.st_size != 0 && symbol2.st_size == 0) {
-    return true;
-  }
-  if (symbol1.st_size == 0 && symbol2.st_size != 0) {
-    return false;
-  }
-
-  // If one of the symbols has no type and the other is not, pick the
-  // one that has a type.
-  char type1 = ELF_ST_TYPE(symbol1.st_info);
-  char type2 = ELF_ST_TYPE(symbol1.st_info);
-  if (type1 != STT_NOTYPE && type2 == STT_NOTYPE) {
-    return true;
-  }
-  if (type1 == STT_NOTYPE && type2 != STT_NOTYPE) {
-    return false;
-  }
-
-  // Pick the first one, if we still cannot decide.
-  return true;
-}
-
-// Return true if an address is inside a section.
-static bool InSection(const void *address, const ElfW(Shdr) * section) {
-  const char *start = reinterpret_cast<const char *>(section->sh_addr);
-  size_t size = static_cast<size_t>(section->sh_size);
-  return start <= address && address < (start + size);
-}
-
-static const char *ComputeOffset(const char *base, ptrdiff_t offset) {
-  // Note: cast to uintptr_t to avoid undefined behavior when base evaluates to
-  // zero and offset is non-zero.
-  return reinterpret_cast<const char *>(
-      reinterpret_cast<uintptr_t>(base) + offset);
-}
-
-// Read a symbol table and look for the symbol containing the
-// pc. Iterate over symbols in a symbol table and look for the symbol
-// containing "pc".  If the symbol is found, and its name fits in
-// out_size, the name is written into out and SYMBOL_FOUND is returned.
-// If the name does not fit, truncated name is written into out,
-// and SYMBOL_TRUNCATED is returned. Out is NUL-terminated.
-// If the symbol is not found, SYMBOL_NOT_FOUND is returned;
-// To keep stack consumption low, we would like this function to not get
-// inlined.
-static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol(
-    const void *const pc, const int fd, char *out, int out_size,
-    ptrdiff_t relocation, const ElfW(Shdr) * strtab, const ElfW(Shdr) * symtab,
-    const ElfW(Shdr) * opd, char *tmp_buf, int tmp_buf_size) {
-  if (symtab == nullptr) {
-    return SYMBOL_NOT_FOUND;
-  }
-
-  // Read multiple symbols at once to save read() calls.
-  ElfW(Sym) *buf = reinterpret_cast<ElfW(Sym) *>(tmp_buf);
-  const int buf_entries = tmp_buf_size / sizeof(buf[0]);
-
-  const int num_symbols = symtab->sh_size / symtab->sh_entsize;
-
-  // On platforms using an .opd section (PowerPC & IA64), a function symbol
-  // has the address of a function descriptor, which contains the real
-  // starting address.  However, we do not always want to use the real
-  // starting address because we sometimes want to symbolize a function
-  // pointer into the .opd section, e.g. FindSymbol(&foo,...).
-  const bool pc_in_opd =
-      kPlatformUsesOPDSections && opd != nullptr && InSection(pc, opd);
-  const bool deref_function_descriptor_pointer =
-      kPlatformUsesOPDSections && opd != nullptr && !pc_in_opd;
-
-  ElfW(Sym) best_match;
-  SafeMemZero(&best_match, sizeof(best_match));
-  bool found_match = false;
-  for (int i = 0; i < num_symbols;) {
-    off_t offset = symtab->sh_offset + i * symtab->sh_entsize;
-    const int num_remaining_symbols = num_symbols - i;
-    const int entries_in_chunk = std::min(num_remaining_symbols, buf_entries);
-    const int bytes_in_chunk = entries_in_chunk * sizeof(buf[0]);
-    const ssize_t len = ReadFromOffset(fd, buf, bytes_in_chunk, offset);
-    SAFE_ASSERT(len % sizeof(buf[0]) == 0);
-    const ssize_t num_symbols_in_buf = len / sizeof(buf[0]);
-    SAFE_ASSERT(num_symbols_in_buf <= entries_in_chunk);
-    for (int j = 0; j < num_symbols_in_buf; ++j) {
-      const ElfW(Sym) &symbol = buf[j];
-
-      // For a DSO, a symbol address is relocated by the loading address.
-      // We keep the original address for opd redirection below.
-      const char *const original_start_address =
-          reinterpret_cast<const char *>(symbol.st_value);
-      const char *start_address =
-          ComputeOffset(original_start_address, relocation);
-
-      if (deref_function_descriptor_pointer &&
-          InSection(original_start_address, opd)) {
-        // The opd section is mapped into memory.  Just dereference
-        // start_address to get the first double word, which points to the
-        // function entry.
-        start_address = *reinterpret_cast<const char *const *>(start_address);
-      }
-
-      // If pc is inside the .opd section, it points to a function descriptor.
-      const size_t size = pc_in_opd ? kFunctionDescriptorSize : symbol.st_size;
-      const void *const end_address = ComputeOffset(start_address, size);
-      if (symbol.st_value != 0 &&  // Skip null value symbols.
-          symbol.st_shndx != 0 &&  // Skip undefined symbols.
-#ifdef STT_TLS
-          ELF_ST_TYPE(symbol.st_info) != STT_TLS &&  // Skip thread-local data.
-#endif                                               // STT_TLS
-          ((start_address <= pc && pc < end_address) ||
-           (start_address == pc && pc == end_address))) {
-        if (!found_match || ShouldPickFirstSymbol(symbol, best_match)) {
-          found_match = true;
-          best_match = symbol;
-        }
-      }
-    }
-    i += num_symbols_in_buf;
-  }
-
-  if (found_match) {
-    const size_t off = strtab->sh_offset + best_match.st_name;
-    const ssize_t n_read = ReadFromOffset(fd, out, out_size, off);
-    if (n_read <= 0) {
-      // This should never happen.
-      ABSL_RAW_LOG(WARNING,
-                   "Unable to read from fd %d at offset %zu: n_read = %zd", fd,
-                   off, n_read);
-      return SYMBOL_NOT_FOUND;
-    }
-    ABSL_RAW_CHECK(n_read <= out_size, "ReadFromOffset read too much data.");
-
-    // strtab->sh_offset points into .strtab-like section that contains
-    // NUL-terminated strings: '\0foo\0barbaz\0...".
-    //
-    // sh_offset+st_name points to the start of symbol name, but we don't know
-    // how long the symbol is, so we try to read as much as we have space for,
-    // and usually over-read (i.e. there is a NUL somewhere before n_read).
-    if (memchr(out, '\0', n_read) == nullptr) {
-      // Either out_size was too small (n_read == out_size and no NUL), or
-      // we tried to read past the EOF (n_read < out_size) and .strtab is
-      // corrupt (missing terminating NUL; should never happen for valid ELF).
-      out[n_read - 1] = '\0';
-      return SYMBOL_TRUNCATED;
-    }
-    return SYMBOL_FOUND;
-  }
-
-  return SYMBOL_NOT_FOUND;
-}
-
-// Get the symbol name of "pc" from the file pointed by "fd".  Process
-// both regular and dynamic symbol tables if necessary.
-// See FindSymbol() comment for description of return value.
-FindSymbolResult Symbolizer::GetSymbolFromObjectFile(
-    const ObjFile &obj, const void *const pc, const ptrdiff_t relocation,
-    char *out, int out_size, char *tmp_buf, int tmp_buf_size) {
-  ElfW(Shdr) symtab;
-  ElfW(Shdr) strtab;
-  ElfW(Shdr) opd;
-  ElfW(Shdr) *opd_ptr = nullptr;
-
-  // On platforms using an .opd sections for function descriptor, read
-  // the section header.  The .opd section is in data segment and should be
-  // loaded but we check that it is mapped just to be extra careful.
-  if (kPlatformUsesOPDSections) {
-    if (GetSectionHeaderByName(obj.fd, kOpdSectionName,
-                               sizeof(kOpdSectionName) - 1, &opd) &&
-        FindObjFile(reinterpret_cast<const char *>(opd.sh_addr) + relocation,
-                    opd.sh_size) != nullptr) {
-      opd_ptr = &opd;
-    } else {
-      return SYMBOL_NOT_FOUND;
-    }
-  }
-
-  // Consult a regular symbol table, then fall back to the dynamic symbol table.
-  for (const auto symbol_table_type : {SHT_SYMTAB, SHT_DYNSYM}) {
-    if (!GetSectionHeaderByType(obj.fd, obj.elf_header.e_shnum,
-                                obj.elf_header.e_shoff, symbol_table_type,
-                                &symtab, tmp_buf, tmp_buf_size)) {
-      continue;
-    }
-    if (!ReadFromOffsetExact(
-            obj.fd, &strtab, sizeof(strtab),
-            obj.elf_header.e_shoff + symtab.sh_link * sizeof(symtab))) {
-      continue;
-    }
-    const FindSymbolResult rc =
-        FindSymbol(pc, obj.fd, out, out_size, relocation, &strtab, &symtab,
-                   opd_ptr, tmp_buf, tmp_buf_size);
-    if (rc != SYMBOL_NOT_FOUND) {
-      return rc;
-    }
-  }
-
-  return SYMBOL_NOT_FOUND;
-}
-
-namespace {
-// Thin wrapper around a file descriptor so that the file descriptor
-// gets closed for sure.
-class FileDescriptor {
- public:
-  explicit FileDescriptor(int fd) : fd_(fd) {}
-  FileDescriptor(const FileDescriptor &) = delete;
-  FileDescriptor &operator=(const FileDescriptor &) = delete;
-
-  ~FileDescriptor() {
-    if (fd_ >= 0) {
-      NO_INTR(close(fd_));
-    }
-  }
-
-  int get() const { return fd_; }
-
- private:
-  const int fd_;
-};
-
-// Helper class for reading lines from file.
-//
-// Note: we don't use ProcMapsIterator since the object is big (it has
-// a 5k array member) and uses async-unsafe functions such as sscanf()
-// and snprintf().
-class LineReader {
- public:
-  explicit LineReader(int fd, char *buf, int buf_len)
-      : fd_(fd),
-        buf_len_(buf_len),
-        buf_(buf),
-        bol_(buf),
-        eol_(buf),
-        eod_(buf) {}
-
-  LineReader(const LineReader &) = delete;
-  LineReader &operator=(const LineReader &) = delete;
-
-  // Read '\n'-terminated line from file.  On success, modify "bol"
-  // and "eol", then return true.  Otherwise, return false.
-  //
-  // Note: if the last line doesn't end with '\n', the line will be
-  // dropped.  It's an intentional behavior to make the code simple.
-  bool ReadLine(const char **bol, const char **eol) {
-    if (BufferIsEmpty()) {  // First time.
-      const ssize_t num_bytes = ReadPersistent(fd_, buf_, buf_len_);
-      if (num_bytes <= 0) {  // EOF or error.
-        return false;
-      }
-      eod_ = buf_ + num_bytes;
-      bol_ = buf_;
-    } else {
-      bol_ = eol_ + 1;            // Advance to the next line in the buffer.
-      SAFE_ASSERT(bol_ <= eod_);  // "bol_" can point to "eod_".
-      if (!HasCompleteLine()) {
-        const int incomplete_line_length = eod_ - bol_;
-        // Move the trailing incomplete line to the beginning.
-        memmove(buf_, bol_, incomplete_line_length);
-        // Read text from file and append it.
-        char *const append_pos = buf_ + incomplete_line_length;
-        const int capacity_left = buf_len_ - incomplete_line_length;
-        const ssize_t num_bytes =
-            ReadPersistent(fd_, append_pos, capacity_left);
-        if (num_bytes <= 0) {  // EOF or error.
-          return false;
-        }
-        eod_ = append_pos + num_bytes;
-        bol_ = buf_;
-      }
-    }
-    eol_ = FindLineFeed();
-    if (eol_ == nullptr) {  // '\n' not found.  Malformed line.
-      return false;
-    }
-    *eol_ = '\0';  // Replace '\n' with '\0'.
-
-    *bol = bol_;
-    *eol = eol_;
-    return true;
-  }
-
- private:
-  char *FindLineFeed() const {
-    return reinterpret_cast<char *>(memchr(bol_, '\n', eod_ - bol_));
-  }
-
-  bool BufferIsEmpty() const { return buf_ == eod_; }
-
-  bool HasCompleteLine() const {
-    return !BufferIsEmpty() && FindLineFeed() != nullptr;
-  }
-
-  const int fd_;
-  const int buf_len_;
-  char *const buf_;
-  char *bol_;
-  char *eol_;
-  const char *eod_;  // End of data in "buf_".
-};
-}  // namespace
-
-// Place the hex number read from "start" into "*hex".  The pointer to
-// the first non-hex character or "end" is returned.
-static const char *GetHex(const char *start, const char *end,
-                          uint64_t *const value) {
-  uint64_t hex = 0;
-  const char *p;
-  for (p = start; p < end; ++p) {
-    int ch = *p;
-    if ((ch >= '0' && ch <= '9') || (ch >= 'A' && ch <= 'F') ||
-        (ch >= 'a' && ch <= 'f')) {
-      hex = (hex << 4) | (ch < 'A' ? ch - '0' : (ch & 0xF) + 9);
-    } else {  // Encountered the first non-hex character.
-      break;
-    }
-  }
-  SAFE_ASSERT(p <= end);
-  *value = hex;
-  return p;
-}
-
-static const char *GetHex(const char *start, const char *end,
-                          const void **const addr) {
-  uint64_t hex = 0;
-  const char *p = GetHex(start, end, &hex);
-  *addr = reinterpret_cast<void *>(hex);
-  return p;
-}
-
-// Normally we are only interested in "r?x" maps.
-// On the PowerPC, function pointers point to descriptors in the .opd
-// section.  The descriptors themselves are not executable code, so
-// we need to relax the check below to "r??".
-static bool ShouldUseMapping(const char *const flags) {
-  return flags[0] == 'r' && (kPlatformUsesOPDSections || flags[2] == 'x');
-}
-
-// Read /proc/self/maps and run "callback" for each mmapped file found.  If
-// "callback" returns false, stop scanning and return true. Else continue
-// scanning /proc/self/maps. Return true if no parse error is found.
-static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap(
-    bool (*callback)(const char *filename, const void *const start_addr,
-                     const void *const end_addr, uint64_t offset, void *arg),
-    void *arg, void *tmp_buf, int tmp_buf_size) {
-  // Use /proc/self/task/<pid>/maps instead of /proc/self/maps. The latter
-  // requires kernel to stop all threads, and is significantly slower when there
-  // are 1000s of threads.
-  char maps_path[80];
-  snprintf(maps_path, sizeof(maps_path), "/proc/self/task/%d/maps", getpid());
-
-  int maps_fd;
-  NO_INTR(maps_fd = open(maps_path, O_RDONLY));
-  FileDescriptor wrapped_maps_fd(maps_fd);
-  if (wrapped_maps_fd.get() < 0) {
-    ABSL_RAW_LOG(WARNING, "%s: errno=%d", maps_path, errno);
-    return false;
-  }
-
-  // Iterate over maps and look for the map containing the pc.  Then
-  // look into the symbol tables inside.
-  LineReader reader(wrapped_maps_fd.get(), static_cast<char *>(tmp_buf),
-                    tmp_buf_size);
-  while (true) {
-    const char *cursor;
-    const char *eol;
-    if (!reader.ReadLine(&cursor, &eol)) {  // EOF or malformed line.
-      break;
-    }
-
-    const char *line = cursor;
-    const void *start_address;
-    // Start parsing line in /proc/self/maps.  Here is an example:
-    //
-    // 08048000-0804c000 r-xp 00000000 08:01 2142121    /bin/cat
-    //
-    // We want start address (08048000), end address (0804c000), flags
-    // (r-xp) and file name (/bin/cat).
-
-    // Read start address.
-    cursor = GetHex(cursor, eol, &start_address);
-    if (cursor == eol || *cursor != '-') {
-      ABSL_RAW_LOG(WARNING, "Corrupt /proc/self/maps line: %s", line);
-      return false;
-    }
-    ++cursor;  // Skip '-'.
-
-    // Read end address.
-    const void *end_address;
-    cursor = GetHex(cursor, eol, &end_address);
-    if (cursor == eol || *cursor != ' ') {
-      ABSL_RAW_LOG(WARNING, "Corrupt /proc/self/maps line: %s", line);
-      return false;
-    }
-    ++cursor;  // Skip ' '.
-
-    // Read flags.  Skip flags until we encounter a space or eol.
-    const char *const flags_start = cursor;
-    while (cursor < eol && *cursor != ' ') {
-      ++cursor;
-    }
-    // We expect at least four letters for flags (ex. "r-xp").
-    if (cursor == eol || cursor < flags_start + 4) {
-      ABSL_RAW_LOG(WARNING, "Corrupt /proc/self/maps: %s", line);
-      return false;
-    }
-
-    // Check flags.
-    if (!ShouldUseMapping(flags_start)) {
-      continue;  // We skip this map.
-    }
-    ++cursor;  // Skip ' '.
-
-    // Read file offset.
-    uint64_t offset;
-    cursor = GetHex(cursor, eol, &offset);
-    ++cursor;  // Skip ' '.
-
-    // Skip to file name.  "cursor" now points to dev.  We need to skip at least
-    // two spaces for dev and inode.
-    int num_spaces = 0;
-    while (cursor < eol) {
-      if (*cursor == ' ') {
-        ++num_spaces;
-      } else if (num_spaces >= 2) {
-        // The first non-space character after  skipping two spaces
-        // is the beginning of the file name.
-        break;
-      }
-      ++cursor;
-    }
-
-    // Check whether this entry corresponds to our hint table for the true
-    // filename.
-    bool hinted =
-        GetFileMappingHint(&start_address, &end_address, &offset, &cursor);
-    if (!hinted && (cursor == eol || cursor[0] == '[')) {
-      // not an object file, typically [vdso] or [vsyscall]
-      continue;
-    }
-    if (!callback(cursor, start_address, end_address, offset, arg)) break;
-  }
-  return true;
-}
-
-// Find the objfile mapped in address region containing [addr, addr + len).
-ObjFile *Symbolizer::FindObjFile(const void *const addr, size_t len) {
-  for (int i = 0; i < 2; ++i) {
-    if (!ok_) return nullptr;
-
-    // Read /proc/self/maps if necessary
-    if (!addr_map_read_) {
-      addr_map_read_ = true;
-      if (!ReadAddrMap(RegisterObjFile, this, tmp_buf_, TMP_BUF_SIZE)) {
-        ok_ = false;
-        return nullptr;
-      }
-    }
-
-    int lo = 0;
-    int hi = addr_map_.Size();
-    while (lo < hi) {
-      int mid = (lo + hi) / 2;
-      if (addr < addr_map_.At(mid)->end_addr) {
-        hi = mid;
-      } else {
-        lo = mid + 1;
-      }
-    }
-    if (lo != addr_map_.Size()) {
-      ObjFile *obj = addr_map_.At(lo);
-      SAFE_ASSERT(obj->end_addr > addr);
-      if (addr >= obj->start_addr &&
-          reinterpret_cast<const char *>(addr) + len <= obj->end_addr)
-        return obj;
-    }
-
-    // The address mapping may have changed since it was last read.  Retry.
-    ClearAddrMap();
-  }
-  return nullptr;
-}
-
-void Symbolizer::ClearAddrMap() {
-  for (int i = 0; i != addr_map_.Size(); i++) {
-    ObjFile *o = addr_map_.At(i);
-    base_internal::LowLevelAlloc::Free(o->filename);
-    if (o->fd >= 0) {
-      NO_INTR(close(o->fd));
-    }
-  }
-  addr_map_.Clear();
-  addr_map_read_ = false;
-}
-
-// Callback for ReadAddrMap to register objfiles in an in-memory table.
-bool Symbolizer::RegisterObjFile(const char *filename,
-                                 const void *const start_addr,
-                                 const void *const end_addr, uint64_t offset,
-                                 void *arg) {
-  Symbolizer *impl = static_cast<Symbolizer *>(arg);
-
-  // Files are supposed to be added in the increasing address order.  Make
-  // sure that's the case.
-  int addr_map_size = impl->addr_map_.Size();
-  if (addr_map_size != 0) {
-    ObjFile *old = impl->addr_map_.At(addr_map_size - 1);
-    if (old->end_addr > end_addr) {
-      ABSL_RAW_LOG(ERROR,
-                   "Unsorted addr map entry: 0x%" PRIxPTR ": %s <-> 0x%" PRIxPTR
-                   ": %s",
-                   reinterpret_cast<uintptr_t>(end_addr), filename,
-                   reinterpret_cast<uintptr_t>(old->end_addr), old->filename);
-      return true;
-    } else if (old->end_addr == end_addr) {
-      // The same entry appears twice. This sometimes happens for [vdso].
-      if (old->start_addr != start_addr ||
-          strcmp(old->filename, filename) != 0) {
-        ABSL_RAW_LOG(ERROR,
-                     "Duplicate addr 0x%" PRIxPTR ": %s <-> 0x%" PRIxPTR ": %s",
-                     reinterpret_cast<uintptr_t>(end_addr), filename,
-                     reinterpret_cast<uintptr_t>(old->end_addr), old->filename);
-      }
-      return true;
-    }
-  }
-  ObjFile *obj = impl->addr_map_.Add();
-  obj->filename = impl->CopyString(filename);
-  obj->start_addr = start_addr;
-  obj->end_addr = end_addr;
-  obj->offset = offset;
-  obj->elf_type = -1;  // filled on demand
-  obj->fd = -1;        // opened on demand
-  return true;
-}
-
-// This function wraps the Demangle function to provide an interface
-// where the input symbol is demangled in-place.
-// To keep stack consumption low, we would like this function to not
-// get inlined.
-static ABSL_ATTRIBUTE_NOINLINE void DemangleInplace(char *out, int out_size,
-                                                    char *tmp_buf,
-                                                    int tmp_buf_size) {
-  if (Demangle(out, tmp_buf, tmp_buf_size)) {
-    // Demangling succeeded. Copy to out if the space allows.
-    int len = strlen(tmp_buf);
-    if (len + 1 <= out_size) {  // +1 for '\0'.
-      SAFE_ASSERT(len < tmp_buf_size);
-      memmove(out, tmp_buf, len + 1);
-    }
-  }
-}
-
-SymbolCacheLine *Symbolizer::GetCacheLine(const void *const pc) {
-  uintptr_t pc0 = reinterpret_cast<uintptr_t>(pc);
-  pc0 >>= 3;  // drop the low 3 bits
-
-  // Shuffle bits.
-  pc0 ^= (pc0 >> 6) ^ (pc0 >> 12) ^ (pc0 >> 18);
-  return &symbol_cache_[pc0 % SYMBOL_CACHE_LINES];
-}
-
-void Symbolizer::AgeSymbols(SymbolCacheLine *line) {
-  for (uint32_t &age : line->age) {
-    ++age;
-  }
-}
-
-const char *Symbolizer::FindSymbolInCache(const void *const pc) {
-  if (pc == nullptr) return nullptr;
-
-  SymbolCacheLine *line = GetCacheLine(pc);
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(line->pc); ++i) {
-    if (line->pc[i] == pc) {
-      AgeSymbols(line);
-      line->age[i] = 0;
-      return line->name[i];
-    }
-  }
-  return nullptr;
-}
-
-const char *Symbolizer::InsertSymbolInCache(const void *const pc,
-                                            const char *name) {
-  SAFE_ASSERT(pc != nullptr);
-
-  SymbolCacheLine *line = GetCacheLine(pc);
-  uint32_t max_age = 0;
-  int oldest_index = -1;
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(line->pc); ++i) {
-    if (line->pc[i] == nullptr) {
-      AgeSymbols(line);
-      line->pc[i] = pc;
-      line->name[i] = CopyString(name);
-      line->age[i] = 0;
-      return line->name[i];
-    }
-    if (line->age[i] >= max_age) {
-      max_age = line->age[i];
-      oldest_index = i;
-    }
-  }
-
-  AgeSymbols(line);
-  ABSL_RAW_CHECK(oldest_index >= 0, "Corrupt cache");
-  base_internal::LowLevelAlloc::Free(line->name[oldest_index]);
-  line->pc[oldest_index] = pc;
-  line->name[oldest_index] = CopyString(name);
-  line->age[oldest_index] = 0;
-  return line->name[oldest_index];
-}
-
-static void MaybeOpenFdFromSelfExe(ObjFile *obj) {
-  if (memcmp(obj->start_addr, ELFMAG, SELFMAG) != 0) {
-    return;
-  }
-  int fd = open("/proc/self/exe", O_RDONLY);
-  if (fd == -1) {
-    return;
-  }
-  // Verify that contents of /proc/self/exe matches in-memory image of
-  // the binary. This can fail if the "deleted" binary is in fact not
-  // the main executable, or for binaries that have the first PT_LOAD
-  // segment smaller than 4K. We do it in four steps so that the
-  // buffer is smaller and we don't consume too much stack space.
-  const char *mem = reinterpret_cast<const char *>(obj->start_addr);
-  for (int i = 0; i < 4; ++i) {
-    char buf[1024];
-    ssize_t n = read(fd, buf, sizeof(buf));
-    if (n != sizeof(buf) || memcmp(buf, mem, sizeof(buf)) != 0) {
-      close(fd);
-      return;
-    }
-    mem += sizeof(buf);
-  }
-  obj->fd = fd;
-}
-
-static bool MaybeInitializeObjFile(ObjFile *obj) {
-  if (obj->fd < 0) {
-    obj->fd = open(obj->filename, O_RDONLY);
-
-    if (obj->fd < 0) {
-      // Getting /proc/self/exe here means that we were hinted.
-      if (strcmp(obj->filename, "/proc/self/exe") == 0) {
-        // /proc/self/exe may be inaccessible (due to setuid, etc.), so try
-        // accessing the binary via argv0.
-        if (argv0_value != nullptr) {
-          obj->fd = open(argv0_value, O_RDONLY);
-        }
-      } else {
-        MaybeOpenFdFromSelfExe(obj);
-      }
-    }
-
-    if (obj->fd < 0) {
-      ABSL_RAW_LOG(WARNING, "%s: open failed: errno=%d", obj->filename, errno);
-      return false;
-    }
-    obj->elf_type = FileGetElfType(obj->fd);
-    if (obj->elf_type < 0) {
-      ABSL_RAW_LOG(WARNING, "%s: wrong elf type: %d", obj->filename,
-                   obj->elf_type);
-      return false;
-    }
-
-    if (!ReadFromOffsetExact(obj->fd, &obj->elf_header, sizeof(obj->elf_header),
-                             0)) {
-      ABSL_RAW_LOG(WARNING, "%s: failed to read elf header", obj->filename);
-      return false;
-    }
-    const int phnum = obj->elf_header.e_phnum;
-    const int phentsize = obj->elf_header.e_phentsize;
-    size_t phoff = obj->elf_header.e_phoff;
-    size_t num_executable_load_segments = 0;
-    for (int j = 0; j < phnum; j++) {
-      ElfW(Phdr) phdr;
-      if (!ReadFromOffsetExact(obj->fd, &phdr, sizeof(phdr), phoff)) {
-        ABSL_RAW_LOG(WARNING, "%s: failed to read program header %d",
-                     obj->filename, j);
-        return false;
-      }
-      phoff += phentsize;
-      constexpr int rx = PF_X | PF_R;
-      if (phdr.p_type != PT_LOAD || (phdr.p_flags & rx) != rx) {
-        // Not a LOAD segment, or not executable code.
-        continue;
-      }
-      if (num_executable_load_segments < obj->phdr.size()) {
-        memcpy(&obj->phdr[num_executable_load_segments++], &phdr, sizeof(phdr));
-      } else {
-        ABSL_RAW_LOG(WARNING, "%s: too many executable LOAD segments",
-                     obj->filename);
-        break;
-      }
-    }
-    if (num_executable_load_segments == 0) {
-      // This object has no "r-x" LOAD segments. That's unexpected.
-      ABSL_RAW_LOG(WARNING, "%s: no executable LOAD segments", obj->filename);
-      return false;
-    }
-  }
-  return true;
-}
-
-// The implementation of our symbolization routine.  If it
-// successfully finds the symbol containing "pc" and obtains the
-// symbol name, returns pointer to that symbol. Otherwise, returns nullptr.
-// If any symbol decorators have been installed via InstallSymbolDecorator(),
-// they are called here as well.
-// To keep stack consumption low, we would like this function to not
-// get inlined.
-const char *Symbolizer::GetSymbol(const void *const pc) {
-  const char *entry = FindSymbolInCache(pc);
-  if (entry != nullptr) {
-    return entry;
-  }
-  symbol_buf_[0] = '\0';
-
-  ObjFile *const obj = FindObjFile(pc, 1);
-  ptrdiff_t relocation = 0;
-  int fd = -1;
-  if (obj != nullptr) {
-    if (MaybeInitializeObjFile(obj)) {
-      const size_t start_addr = reinterpret_cast<size_t>(obj->start_addr);
-      if (obj->elf_type == ET_DYN && start_addr >= obj->offset) {
-        // This object was relocated.
-        //
-        // For obj->offset > 0, adjust the relocation since a mapping at offset
-        // X in the file will have a start address of [true relocation]+X.
-        relocation = start_addr - obj->offset;
-
-        // Note: some binaries have multiple "rx" LOAD segments. We must
-        // find the right one.
-        ElfW(Phdr) *phdr = nullptr;
-        for (size_t j = 0; j < obj->phdr.size(); j++) {
-          ElfW(Phdr) &p = obj->phdr[j];
-          if (p.p_type != PT_LOAD) {
-            // We only expect PT_LOADs. This must be PT_NULL that we didn't
-            // write over (i.e. we exhausted all interesting PT_LOADs).
-            ABSL_RAW_CHECK(p.p_type == PT_NULL, "unexpected p_type");
-            break;
-          }
-          if (pc < reinterpret_cast<void *>(start_addr + p.p_memsz)) {
-            phdr = &p;
-            break;
-          }
-        }
-        if (phdr == nullptr) {
-          // That's unexpected. Hope for the best.
-          ABSL_RAW_LOG(
-              WARNING,
-              "%s: unable to find LOAD segment for pc: %p, start_addr: %zx",
-              obj->filename, pc, start_addr);
-        } else {
-          // Adjust relocation in case phdr.p_vaddr != 0.
-          // This happens for binaries linked with `lld --rosegment`, and for
-          // binaries linked with BFD `ld -z separate-code`.
-          relocation -= phdr->p_vaddr - phdr->p_offset;
-        }
-      }
-
-      fd = obj->fd;
-      if (GetSymbolFromObjectFile(*obj, pc, relocation, symbol_buf_,
-                                  sizeof(symbol_buf_), tmp_buf_,
-                                  sizeof(tmp_buf_)) == SYMBOL_FOUND) {
-        // Only try to demangle the symbol name if it fit into symbol_buf_.
-        DemangleInplace(symbol_buf_, sizeof(symbol_buf_), tmp_buf_,
-                        sizeof(tmp_buf_));
-      }
-    }
-  } else {
-#if ABSL_HAVE_VDSO_SUPPORT
-    VDSOSupport vdso;
-    if (vdso.IsPresent()) {
-      VDSOSupport::SymbolInfo symbol_info;
-      if (vdso.LookupSymbolByAddress(pc, &symbol_info)) {
-        // All VDSO symbols are known to be short.
-        size_t len = strlen(symbol_info.name);
-        ABSL_RAW_CHECK(len + 1 < sizeof(symbol_buf_),
-                       "VDSO symbol unexpectedly long");
-        memcpy(symbol_buf_, symbol_info.name, len + 1);
-      }
-    }
-#endif
-  }
-
-  if (g_decorators_mu.TryLock()) {
-    if (g_num_decorators > 0) {
-      SymbolDecoratorArgs decorator_args = {
-          pc,       relocation,       fd,     symbol_buf_, sizeof(symbol_buf_),
-          tmp_buf_, sizeof(tmp_buf_), nullptr};
-      for (int i = 0; i < g_num_decorators; ++i) {
-        decorator_args.arg = g_decorators[i].arg;
-        g_decorators[i].fn(&decorator_args);
-      }
-    }
-    g_decorators_mu.Unlock();
-  }
-  if (symbol_buf_[0] == '\0') {
-    return nullptr;
-  }
-  symbol_buf_[sizeof(symbol_buf_) - 1] = '\0';  // Paranoia.
-  return InsertSymbolInCache(pc, symbol_buf_);
-}
-
-bool RemoveAllSymbolDecorators(void) {
-  if (!g_decorators_mu.TryLock()) {
-    // Someone else is using decorators. Get out.
-    return false;
-  }
-  g_num_decorators = 0;
-  g_decorators_mu.Unlock();
-  return true;
-}
-
-bool RemoveSymbolDecorator(int ticket) {
-  if (!g_decorators_mu.TryLock()) {
-    // Someone else is using decorators. Get out.
-    return false;
-  }
-  for (int i = 0; i < g_num_decorators; ++i) {
-    if (g_decorators[i].ticket == ticket) {
-      while (i < g_num_decorators - 1) {
-        g_decorators[i] = g_decorators[i + 1];
-        ++i;
-      }
-      g_num_decorators = i;
-      break;
-    }
-  }
-  g_decorators_mu.Unlock();
-  return true;  // Decorator is known to be removed.
-}
-
-int InstallSymbolDecorator(SymbolDecorator decorator, void *arg) {
-  static int ticket = 0;
-
-  if (!g_decorators_mu.TryLock()) {
-    // Someone else is using decorators. Get out.
-    return -2;
-  }
-  int ret = ticket;
-  if (g_num_decorators >= kMaxDecorators) {
-    ret = -1;
-  } else {
-    g_decorators[g_num_decorators] = {decorator, arg, ticket++};
-    ++g_num_decorators;
-  }
-  g_decorators_mu.Unlock();
-  return ret;
-}
-
-bool RegisterFileMappingHint(const void *start, const void *end, uint64_t offset,
-                             const char *filename) {
-  SAFE_ASSERT(start <= end);
-  SAFE_ASSERT(filename != nullptr);
-
-  InitSigSafeArena();
-
-  if (!g_file_mapping_mu.TryLock()) {
-    return false;
-  }
-
-  bool ret = true;
-  if (g_num_file_mapping_hints >= kMaxFileMappingHints) {
-    ret = false;
-  } else {
-    // TODO(ckennelly): Move this into a string copy routine.
-    int len = strlen(filename);
-    char *dst = static_cast<char *>(
-        base_internal::LowLevelAlloc::AllocWithArena(len + 1, SigSafeArena()));
-    ABSL_RAW_CHECK(dst != nullptr, "out of memory");
-    memcpy(dst, filename, len + 1);
-
-    auto &hint = g_file_mapping_hints[g_num_file_mapping_hints++];
-    hint.start = start;
-    hint.end = end;
-    hint.offset = offset;
-    hint.filename = dst;
-  }
-
-  g_file_mapping_mu.Unlock();
-  return ret;
-}
-
-bool GetFileMappingHint(const void **start, const void **end, uint64_t *offset,
-                        const char **filename) {
-  if (!g_file_mapping_mu.TryLock()) {
-    return false;
-  }
-  bool found = false;
-  for (int i = 0; i < g_num_file_mapping_hints; i++) {
-    if (g_file_mapping_hints[i].start <= *start &&
-        *end <= g_file_mapping_hints[i].end) {
-      // We assume that the start_address for the mapping is the base
-      // address of the ELF section, but when [start_address,end_address) is
-      // not strictly equal to [hint.start, hint.end), that assumption is
-      // invalid.
-      //
-      // This uses the hint's start address (even though hint.start is not
-      // necessarily equal to start_address) to ensure the correct
-      // relocation is computed later.
-      *start = g_file_mapping_hints[i].start;
-      *end = g_file_mapping_hints[i].end;
-      *offset = g_file_mapping_hints[i].offset;
-      *filename = g_file_mapping_hints[i].filename;
-      found = true;
-      break;
-    }
-  }
-  g_file_mapping_mu.Unlock();
-  return found;
-}
-
-}  // namespace debugging_internal
-
-bool Symbolize(const void *pc, char *out, int out_size) {
-  // Symbolization is very slow under tsan.
-  ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN();
-  SAFE_ASSERT(out_size >= 0);
-  debugging_internal::Symbolizer *s = debugging_internal::AllocateSymbolizer();
-  const char *name = s->GetSymbol(pc);
-  bool ok = false;
-  if (name != nullptr && out_size > 0) {
-    strncpy(out, name, out_size);
-    ok = true;
-    if (out[out_size - 1] != '\0') {
-      // strncpy() does not '\0' terminate when it truncates.  Do so, with
-      // trailing ellipsis.
-      static constexpr char kEllipsis[] = "...";
-      int ellipsis_size =
-          std::min(implicit_cast<int>(strlen(kEllipsis)), out_size - 1);
-      memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
-      out[out_size - 1] = '\0';
-    }
-  }
-  debugging_internal::FreeSymbolizer(s);
-  ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END();
-  return ok;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-extern "C" bool AbslInternalGetFileMappingHint(const void **start,
-                                               const void **end, uint64_t *offset,
-                                               const char **filename) {
-  return absl::debugging_internal::GetFileMappingHint(start, end, offset,
-                                                      filename);
-}
diff --git a/third_party/abseil/absl/debugging/symbolize_test.cc b/third_party/abseil/absl/debugging/symbolize_test.cc
deleted file mode 100644
index a2dd495..0000000
--- a/third_party/abseil/absl/debugging/symbolize_test.cc
+++ /dev/null
@@ -1,557 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/debugging/symbolize.h"
-
-#ifndef _WIN32
-#include <fcntl.h>
-#include <sys/mman.h>
-#endif
-
-#include <cstring>
-#include <iostream>
-#include <memory>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/casts.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/per_thread_tls.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/optimization.h"
-#include "absl/debugging/internal/stack_consumption.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/string_view.h"
-
-using testing::Contains;
-
-#ifdef _WIN32
-#define ABSL_SYMBOLIZE_TEST_NOINLINE __declspec(noinline)
-#else
-#define ABSL_SYMBOLIZE_TEST_NOINLINE ABSL_ATTRIBUTE_NOINLINE
-#endif
-
-// Functions to symbolize. Use C linkage to avoid mangled names.
-extern "C" {
-ABSL_SYMBOLIZE_TEST_NOINLINE void nonstatic_func() {
-  // The next line makes this a unique function to prevent the compiler from
-  // folding identical functions together.
-  volatile int x = __LINE__;
-  static_cast<void>(x);
-  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
-}
-
-ABSL_SYMBOLIZE_TEST_NOINLINE static void static_func() {
-  // The next line makes this a unique function to prevent the compiler from
-  // folding identical functions together.
-  volatile int x = __LINE__;
-  static_cast<void>(x);
-  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
-}
-}  // extern "C"
-
-struct Foo {
-  static void func(int x);
-};
-
-// A C++ method that should have a mangled name.
-ABSL_SYMBOLIZE_TEST_NOINLINE void Foo::func(int) {
-  // The next line makes this a unique function to prevent the compiler from
-  // folding identical functions together.
-  volatile int x = __LINE__;
-  static_cast<void>(x);
-  ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
-}
-
-// Create functions that will remain in different text sections in the
-// final binary when linker option "-z,keep-text-section-prefix" is used.
-int ABSL_ATTRIBUTE_SECTION_VARIABLE(.text.unlikely) unlikely_func() {
-  return 0;
-}
-
-int ABSL_ATTRIBUTE_SECTION_VARIABLE(.text.hot) hot_func() {
-  return 0;
-}
-
-int ABSL_ATTRIBUTE_SECTION_VARIABLE(.text.startup) startup_func() {
-  return 0;
-}
-
-int ABSL_ATTRIBUTE_SECTION_VARIABLE(.text.exit) exit_func() {
-  return 0;
-}
-
-int /*ABSL_ATTRIBUTE_SECTION_VARIABLE(.text)*/ regular_func() {
-  return 0;
-}
-
-// Thread-local data may confuse the symbolizer, ensure that it does not.
-// Variable sizes and order are important.
-#if ABSL_PER_THREAD_TLS
-static ABSL_PER_THREAD_TLS_KEYWORD char symbolize_test_thread_small[1];
-static ABSL_PER_THREAD_TLS_KEYWORD char
-    symbolize_test_thread_big[2 * 1024 * 1024];
-#endif
-
-#if !defined(__EMSCRIPTEN__)
-// Used below to hopefully inhibit some compiler/linker optimizations
-// that may remove kHpageTextPadding, kPadding0, and kPadding1 from
-// the binary.
-static volatile bool volatile_bool = false;
-
-// Force the binary to be large enough that a THP .text remap will succeed.
-static constexpr size_t kHpageSize = 1 << 21;
-const char kHpageTextPadding[kHpageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(
-    .text) = "";
-#endif  // !defined(__EMSCRIPTEN__)
-
-static char try_symbolize_buffer[4096];
-
-// A wrapper function for absl::Symbolize() to make the unit test simple.  The
-// limit must be < sizeof(try_symbolize_buffer).  Returns null if
-// absl::Symbolize() returns false, otherwise returns try_symbolize_buffer with
-// the result of absl::Symbolize().
-static const char *TrySymbolizeWithLimit(void *pc, int limit) {
-  ABSL_RAW_CHECK(limit <= sizeof(try_symbolize_buffer),
-                 "try_symbolize_buffer is too small");
-
-  // Use the heap to facilitate heap and buffer sanitizer tools.
-  auto heap_buffer = absl::make_unique<char[]>(sizeof(try_symbolize_buffer));
-  bool found = absl::Symbolize(pc, heap_buffer.get(), limit);
-  if (found) {
-    ABSL_RAW_CHECK(strnlen(heap_buffer.get(), limit) < limit,
-                   "absl::Symbolize() did not properly terminate the string");
-    strncpy(try_symbolize_buffer, heap_buffer.get(),
-            sizeof(try_symbolize_buffer) - 1);
-    try_symbolize_buffer[sizeof(try_symbolize_buffer) - 1] = '\0';
-  }
-
-  return found ? try_symbolize_buffer : nullptr;
-}
-
-// A wrapper for TrySymbolizeWithLimit(), with a large limit.
-static const char *TrySymbolize(void *pc) {
-  return TrySymbolizeWithLimit(pc, sizeof(try_symbolize_buffer));
-}
-
-#if defined(ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE) || \
-    defined(ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE)
-
-TEST(Symbolize, Cached) {
-  // Compilers should give us pointers to them.
-  EXPECT_STREQ("nonstatic_func", TrySymbolize((void *)(&nonstatic_func)));
-
-  // The name of an internal linkage symbol is not specified; allow either a
-  // mangled or an unmangled name here.
-  const char *static_func_symbol = TrySymbolize((void *)(&static_func));
-  EXPECT_TRUE(strcmp("static_func", static_func_symbol) == 0 ||
-              strcmp("static_func()", static_func_symbol) == 0);
-
-  EXPECT_TRUE(nullptr == TrySymbolize(nullptr));
-}
-
-TEST(Symbolize, Truncation) {
-  constexpr char kNonStaticFunc[] = "nonstatic_func";
-  EXPECT_STREQ("nonstatic_func",
-               TrySymbolizeWithLimit((void *)(&nonstatic_func),
-                                     strlen(kNonStaticFunc) + 1));
-  EXPECT_STREQ("nonstatic_...",
-               TrySymbolizeWithLimit((void *)(&nonstatic_func),
-                                     strlen(kNonStaticFunc) + 0));
-  EXPECT_STREQ("nonstatic...",
-               TrySymbolizeWithLimit((void *)(&nonstatic_func),
-                                     strlen(kNonStaticFunc) - 1));
-  EXPECT_STREQ("n...", TrySymbolizeWithLimit((void *)(&nonstatic_func), 5));
-  EXPECT_STREQ("...", TrySymbolizeWithLimit((void *)(&nonstatic_func), 4));
-  EXPECT_STREQ("..", TrySymbolizeWithLimit((void *)(&nonstatic_func), 3));
-  EXPECT_STREQ(".", TrySymbolizeWithLimit((void *)(&nonstatic_func), 2));
-  EXPECT_STREQ("", TrySymbolizeWithLimit((void *)(&nonstatic_func), 1));
-  EXPECT_EQ(nullptr, TrySymbolizeWithLimit((void *)(&nonstatic_func), 0));
-}
-
-TEST(Symbolize, SymbolizeWithDemangling) {
-  Foo::func(100);
-  EXPECT_STREQ("Foo::func()", TrySymbolize((void *)(&Foo::func)));
-}
-
-TEST(Symbolize, SymbolizeSplitTextSections) {
-  EXPECT_STREQ("unlikely_func()", TrySymbolize((void *)(&unlikely_func)));
-  EXPECT_STREQ("hot_func()", TrySymbolize((void *)(&hot_func)));
-  EXPECT_STREQ("startup_func()", TrySymbolize((void *)(&startup_func)));
-  EXPECT_STREQ("exit_func()", TrySymbolize((void *)(&exit_func)));
-  EXPECT_STREQ("regular_func()", TrySymbolize((void *)(&regular_func)));
-}
-
-// Tests that verify that Symbolize stack footprint is within some limit.
-#ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
-
-static void *g_pc_to_symbolize;
-static char g_symbolize_buffer[4096];
-static char *g_symbolize_result;
-
-static void SymbolizeSignalHandler(int signo) {
-  if (absl::Symbolize(g_pc_to_symbolize, g_symbolize_buffer,
-                      sizeof(g_symbolize_buffer))) {
-    g_symbolize_result = g_symbolize_buffer;
-  } else {
-    g_symbolize_result = nullptr;
-  }
-}
-
-// Call Symbolize and figure out the stack footprint of this call.
-static const char *SymbolizeStackConsumption(void *pc, int *stack_consumed) {
-  g_pc_to_symbolize = pc;
-  *stack_consumed = absl::debugging_internal::GetSignalHandlerStackConsumption(
-      SymbolizeSignalHandler);
-  return g_symbolize_result;
-}
-
-static int GetStackConsumptionUpperLimit() {
-  // Symbolize stack consumption should be within 2kB.
-  int stack_consumption_upper_limit = 2048;
-#if defined(ABSL_HAVE_ADDRESS_SANITIZER) || \
-    defined(ABSL_HAVE_MEMORY_SANITIZER) || defined(ABSL_HAVE_THREAD_SANITIZER)
-  // Account for sanitizer instrumentation requiring additional stack space.
-  stack_consumption_upper_limit *= 5;
-#endif
-  return stack_consumption_upper_limit;
-}
-
-TEST(Symbolize, SymbolizeStackConsumption) {
-  int stack_consumed = 0;
-
-  const char *symbol =
-      SymbolizeStackConsumption((void *)(&nonstatic_func), &stack_consumed);
-  EXPECT_STREQ("nonstatic_func", symbol);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, GetStackConsumptionUpperLimit());
-
-  // The name of an internal linkage symbol is not specified; allow either a
-  // mangled or an unmangled name here.
-  symbol = SymbolizeStackConsumption((void *)(&static_func), &stack_consumed);
-  EXPECT_TRUE(strcmp("static_func", symbol) == 0 ||
-              strcmp("static_func()", symbol) == 0);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, GetStackConsumptionUpperLimit());
-}
-
-TEST(Symbolize, SymbolizeWithDemanglingStackConsumption) {
-  Foo::func(100);
-  int stack_consumed = 0;
-
-  const char *symbol =
-      SymbolizeStackConsumption((void *)(&Foo::func), &stack_consumed);
-
-  EXPECT_STREQ("Foo::func()", symbol);
-  EXPECT_GT(stack_consumed, 0);
-  EXPECT_LT(stack_consumed, GetStackConsumptionUpperLimit());
-}
-
-#endif  // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION
-
-#ifndef ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE
-// Use a 64K page size for PPC.
-const size_t kPageSize = 64 << 10;
-// We place a read-only symbols into the .text section and verify that we can
-// symbolize them and other symbols after remapping them.
-const char kPadding0[kPageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(.text) =
-    "";
-const char kPadding1[kPageSize * 4] ABSL_ATTRIBUTE_SECTION_VARIABLE(.text) =
-    "";
-
-static int FilterElfHeader(struct dl_phdr_info *info, size_t size, void *data) {
-  for (int i = 0; i < info->dlpi_phnum; i++) {
-    if (info->dlpi_phdr[i].p_type == PT_LOAD &&
-        info->dlpi_phdr[i].p_flags == (PF_R | PF_X)) {
-      const void *const vaddr =
-          absl::bit_cast<void *>(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
-      const auto segsize = info->dlpi_phdr[i].p_memsz;
-
-      const char *self_exe;
-      if (info->dlpi_name != nullptr && info->dlpi_name[0] != '\0') {
-        self_exe = info->dlpi_name;
-      } else {
-        self_exe = "/proc/self/exe";
-      }
-
-      absl::debugging_internal::RegisterFileMappingHint(
-          vaddr, reinterpret_cast<const char *>(vaddr) + segsize,
-          info->dlpi_phdr[i].p_offset, self_exe);
-
-      return 1;
-    }
-  }
-
-  return 1;
-}
-
-TEST(Symbolize, SymbolizeWithMultipleMaps) {
-  // Force kPadding0 and kPadding1 to be linked in.
-  if (volatile_bool) {
-    ABSL_RAW_LOG(INFO, "%s", kPadding0);
-    ABSL_RAW_LOG(INFO, "%s", kPadding1);
-  }
-
-  // Verify we can symbolize everything.
-  char buf[512];
-  memset(buf, 0, sizeof(buf));
-  absl::Symbolize(kPadding0, buf, sizeof(buf));
-  EXPECT_STREQ("kPadding0", buf);
-
-  memset(buf, 0, sizeof(buf));
-  absl::Symbolize(kPadding1, buf, sizeof(buf));
-  EXPECT_STREQ("kPadding1", buf);
-
-  // Specify a hint for the executable segment.
-  dl_iterate_phdr(FilterElfHeader, nullptr);
-
-  // Reload at least one page out of kPadding0, kPadding1
-  const char *ptrs[] = {kPadding0, kPadding1};
-
-  for (const char *ptr : ptrs) {
-    const int kMapFlags = MAP_ANONYMOUS | MAP_PRIVATE;
-    void *addr = mmap(nullptr, kPageSize, PROT_READ, kMapFlags, 0, 0);
-    ASSERT_NE(addr, MAP_FAILED);
-
-    // kPadding[0-1] is full of zeroes, so we can remap anywhere within it, but
-    // we ensure there is at least a full page of padding.
-    void *remapped = reinterpret_cast<void *>(
-        reinterpret_cast<uintptr_t>(ptr + kPageSize) & ~(kPageSize - 1ULL));
-
-    const int kMremapFlags = (MREMAP_MAYMOVE | MREMAP_FIXED);
-    void *ret = mremap(addr, kPageSize, kPageSize, kMremapFlags, remapped);
-    ASSERT_NE(ret, MAP_FAILED);
-  }
-
-  // Invalidate the symbolization cache so we are forced to rely on the hint.
-  absl::Symbolize(nullptr, buf, sizeof(buf));
-
-  // Verify we can still symbolize.
-  const char *expected[] = {"kPadding0", "kPadding1"};
-  const size_t offsets[] = {0, kPageSize, 2 * kPageSize, 3 * kPageSize};
-
-  for (int i = 0; i < 2; i++) {
-    for (size_t offset : offsets) {
-      memset(buf, 0, sizeof(buf));
-      absl::Symbolize(ptrs[i] + offset, buf, sizeof(buf));
-      EXPECT_STREQ(expected[i], buf);
-    }
-  }
-}
-
-// Appends string(*args->arg) to args->symbol_buf.
-static void DummySymbolDecorator(
-    const absl::debugging_internal::SymbolDecoratorArgs *args) {
-  std::string *message = static_cast<std::string *>(args->arg);
-  strncat(args->symbol_buf, message->c_str(),
-          args->symbol_buf_size - strlen(args->symbol_buf) - 1);
-}
-
-TEST(Symbolize, InstallAndRemoveSymbolDecorators) {
-  int ticket_a;
-  std::string a_message("a");
-  EXPECT_GE(ticket_a = absl::debugging_internal::InstallSymbolDecorator(
-                DummySymbolDecorator, &a_message),
-            0);
-
-  int ticket_b;
-  std::string b_message("b");
-  EXPECT_GE(ticket_b = absl::debugging_internal::InstallSymbolDecorator(
-                DummySymbolDecorator, &b_message),
-            0);
-
-  int ticket_c;
-  std::string c_message("c");
-  EXPECT_GE(ticket_c = absl::debugging_internal::InstallSymbolDecorator(
-                DummySymbolDecorator, &c_message),
-            0);
-
-  char *address = reinterpret_cast<char *>(1);
-  EXPECT_STREQ("abc", TrySymbolize(address++));
-
-  EXPECT_TRUE(absl::debugging_internal::RemoveSymbolDecorator(ticket_b));
-
-  EXPECT_STREQ("ac", TrySymbolize(address++));
-
-  // Cleanup: remove all remaining decorators so other stack traces don't
-  // get mystery "ac" decoration.
-  EXPECT_TRUE(absl::debugging_internal::RemoveSymbolDecorator(ticket_a));
-  EXPECT_TRUE(absl::debugging_internal::RemoveSymbolDecorator(ticket_c));
-}
-
-// Some versions of Clang with optimizations enabled seem to be able
-// to optimize away the .data section if no variables live in the
-// section. This variable should get placed in the .data section, and
-// the test below checks for the existence of a .data section.
-static int in_data_section = 1;
-
-TEST(Symbolize, ForEachSection) {
-  int fd = TEMP_FAILURE_RETRY(open("/proc/self/exe", O_RDONLY));
-  ASSERT_NE(fd, -1);
-
-  std::vector<std::string> sections;
-  ASSERT_TRUE(absl::debugging_internal::ForEachSection(
-      fd, [&sections](const absl::string_view name, const ElfW(Shdr) &) {
-        sections.emplace_back(name);
-        return true;
-      }));
-
-  // Check for the presence of common section names.
-  EXPECT_THAT(sections, Contains(".text"));
-  EXPECT_THAT(sections, Contains(".rodata"));
-  EXPECT_THAT(sections, Contains(".bss"));
-  ++in_data_section;
-  EXPECT_THAT(sections, Contains(".data"));
-
-  close(fd);
-}
-#endif  // !ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE
-
-// x86 specific tests.  Uses some inline assembler.
-extern "C" {
-inline void *ABSL_ATTRIBUTE_ALWAYS_INLINE inline_func() {
-  void *pc = nullptr;
-#if defined(__i386__)
-  __asm__ __volatile__("call 1f;\n 1: pop %[PC]" : [ PC ] "=r"(pc));
-#elif defined(__x86_64__)
-  __asm__ __volatile__("leaq 0(%%rip),%[PC];\n" : [ PC ] "=r"(pc));
-#endif
-  return pc;
-}
-
-void *ABSL_ATTRIBUTE_NOINLINE non_inline_func() {
-  void *pc = nullptr;
-#if defined(__i386__)
-  __asm__ __volatile__("call 1f;\n 1: pop %[PC]" : [ PC ] "=r"(pc));
-#elif defined(__x86_64__)
-  __asm__ __volatile__("leaq 0(%%rip),%[PC];\n" : [ PC ] "=r"(pc));
-#endif
-  return pc;
-}
-
-void ABSL_ATTRIBUTE_NOINLINE TestWithPCInsideNonInlineFunction() {
-#if defined(ABSL_HAVE_ATTRIBUTE_NOINLINE) && \
-    (defined(__i386__) || defined(__x86_64__))
-  void *pc = non_inline_func();
-  const char *symbol = TrySymbolize(pc);
-  ABSL_RAW_CHECK(symbol != nullptr, "TestWithPCInsideNonInlineFunction failed");
-  ABSL_RAW_CHECK(strcmp(symbol, "non_inline_func") == 0,
-                 "TestWithPCInsideNonInlineFunction failed");
-  std::cout << "TestWithPCInsideNonInlineFunction passed" << std::endl;
-#endif
-}
-
-void ABSL_ATTRIBUTE_NOINLINE TestWithPCInsideInlineFunction() {
-#if defined(ABSL_HAVE_ATTRIBUTE_ALWAYS_INLINE) && \
-    (defined(__i386__) || defined(__x86_64__))
-  void *pc = inline_func();  // Must be inlined.
-  const char *symbol = TrySymbolize(pc);
-  ABSL_RAW_CHECK(symbol != nullptr, "TestWithPCInsideInlineFunction failed");
-  ABSL_RAW_CHECK(strcmp(symbol, __FUNCTION__) == 0,
-                 "TestWithPCInsideInlineFunction failed");
-  std::cout << "TestWithPCInsideInlineFunction passed" << std::endl;
-#endif
-}
-}
-
-// Test with a return address.
-void ABSL_ATTRIBUTE_NOINLINE TestWithReturnAddress() {
-#if defined(ABSL_HAVE_ATTRIBUTE_NOINLINE)
-  void *return_address = __builtin_return_address(0);
-  const char *symbol = TrySymbolize(return_address);
-  ABSL_RAW_CHECK(symbol != nullptr, "TestWithReturnAddress failed");
-  ABSL_RAW_CHECK(strcmp(symbol, "main") == 0, "TestWithReturnAddress failed");
-  std::cout << "TestWithReturnAddress passed" << std::endl;
-#endif
-}
-
-#elif defined(_WIN32)
-#if !defined(ABSL_CONSUME_DLL)
-
-TEST(Symbolize, Basics) {
-  EXPECT_STREQ("nonstatic_func", TrySymbolize((void *)(&nonstatic_func)));
-
-  // The name of an internal linkage symbol is not specified; allow either a
-  // mangled or an unmangled name here.
-  const char *static_func_symbol = TrySymbolize((void *)(&static_func));
-  ASSERT_TRUE(static_func_symbol != nullptr);
-  EXPECT_TRUE(strstr(static_func_symbol, "static_func") != nullptr);
-
-  EXPECT_TRUE(nullptr == TrySymbolize(nullptr));
-}
-
-TEST(Symbolize, Truncation) {
-  constexpr char kNonStaticFunc[] = "nonstatic_func";
-  EXPECT_STREQ("nonstatic_func",
-               TrySymbolizeWithLimit((void *)(&nonstatic_func),
-                                     strlen(kNonStaticFunc) + 1));
-  EXPECT_STREQ("nonstatic_...",
-               TrySymbolizeWithLimit((void *)(&nonstatic_func),
-                                     strlen(kNonStaticFunc) + 0));
-  EXPECT_STREQ("nonstatic...",
-               TrySymbolizeWithLimit((void *)(&nonstatic_func),
-                                     strlen(kNonStaticFunc) - 1));
-  EXPECT_STREQ("n...", TrySymbolizeWithLimit((void *)(&nonstatic_func), 5));
-  EXPECT_STREQ("...", TrySymbolizeWithLimit((void *)(&nonstatic_func), 4));
-  EXPECT_STREQ("..", TrySymbolizeWithLimit((void *)(&nonstatic_func), 3));
-  EXPECT_STREQ(".", TrySymbolizeWithLimit((void *)(&nonstatic_func), 2));
-  EXPECT_STREQ("", TrySymbolizeWithLimit((void *)(&nonstatic_func), 1));
-  EXPECT_EQ(nullptr, TrySymbolizeWithLimit((void *)(&nonstatic_func), 0));
-}
-
-TEST(Symbolize, SymbolizeWithDemangling) {
-  const char *result = TrySymbolize((void *)(&Foo::func));
-  ASSERT_TRUE(result != nullptr);
-  EXPECT_TRUE(strstr(result, "Foo::func") != nullptr) << result;
-}
-
-#endif  // !defined(ABSL_CONSUME_DLL)
-#else  // Symbolizer unimplemented
-
-TEST(Symbolize, Unimplemented) {
-  char buf[64];
-  EXPECT_FALSE(absl::Symbolize((void *)(&nonstatic_func), buf, sizeof(buf)));
-  EXPECT_FALSE(absl::Symbolize((void *)(&static_func), buf, sizeof(buf)));
-  EXPECT_FALSE(absl::Symbolize((void *)(&Foo::func), buf, sizeof(buf)));
-}
-
-#endif
-
-int main(int argc, char **argv) {
-#if !defined(__EMSCRIPTEN__)
-  // Make sure kHpageTextPadding is linked into the binary.
-  if (volatile_bool) {
-    ABSL_RAW_LOG(INFO, "%s", kHpageTextPadding);
-  }
-#endif  // !defined(__EMSCRIPTEN__)
-
-#if ABSL_PER_THREAD_TLS
-  // Touch the per-thread variables.
-  symbolize_test_thread_small[0] = 0;
-  symbolize_test_thread_big[0] = 0;
-#endif
-
-  absl::InitializeSymbolizer(argv[0]);
-  testing::InitGoogleTest(&argc, argv);
-
-#if defined(ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE) || \
-    defined(ABSL_INTERNAL_HAVE_DARWIN_SYMBOLIZE)
-  TestWithPCInsideInlineFunction();
-  TestWithPCInsideNonInlineFunction();
-  TestWithReturnAddress();
-#endif
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/abseil/absl/debugging/symbolize_unimplemented.inc b/third_party/abseil/absl/debugging/symbolize_unimplemented.inc
deleted file mode 100644
index db24456..0000000
--- a/third_party/abseil/absl/debugging/symbolize_unimplemented.inc
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdint>
-
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace debugging_internal {
-
-int InstallSymbolDecorator(SymbolDecorator, void*) { return -1; }
-bool RemoveSymbolDecorator(int) { return false; }
-bool RemoveAllSymbolDecorators(void) { return false; }
-bool RegisterFileMappingHint(const void *, const void *, uint64_t, const char *) {
-  return false;
-}
-bool GetFileMappingHint(const void **, const void **, uint64_t *, const char **) {
-  return false;
-}
-
-}  // namespace debugging_internal
-
-void InitializeSymbolizer(const char*) {}
-bool Symbolize(const void *, char *, int) { return false; }
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/debugging/symbolize_win32.inc b/third_party/abseil/absl/debugging/symbolize_win32.inc
deleted file mode 100644
index c3df46f..0000000
--- a/third_party/abseil/absl/debugging/symbolize_win32.inc
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// See "Retrieving Symbol Information by Address":
-// https://msdn.microsoft.com/en-us/library/windows/desktop/ms680578(v=vs.85).aspx
-
-#include <windows.h>
-
-// MSVC header dbghelp.h has a warning for an ignored typedef.
-#pragma warning(push)
-#pragma warning(disable:4091)
-#include <dbghelp.h>
-#pragma warning(pop)
-
-#pragma comment(lib, "dbghelp.lib")
-
-#include <algorithm>
-#include <cstring>
-
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-static HANDLE process = NULL;
-
-void InitializeSymbolizer(const char*) {
-  if (process != nullptr) {
-    return;
-  }
-  process = GetCurrentProcess();
-
-  // Symbols are not loaded until a reference is made requiring the
-  // symbols be loaded. This is the fastest, most efficient way to use
-  // the symbol handler.
-  SymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_UNDNAME);
-  if (!SymInitialize(process, nullptr, true)) {
-    // GetLastError() returns a Win32 DWORD, but we assign to
-    // unsigned long long to simplify the ABSL_RAW_LOG case below.  The uniform
-    // initialization guarantees this is not a narrowing conversion.
-    const unsigned long long error{GetLastError()};  // NOLINT(runtime/int)
-    ABSL_RAW_LOG(FATAL, "SymInitialize() failed: %llu", error);
-  }
-}
-
-bool Symbolize(const void* pc, char* out, int out_size) {
-  if (out_size <= 0) {
-    return false;
-  }
-  alignas(SYMBOL_INFO) char buf[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
-  SYMBOL_INFO* symbol = reinterpret_cast<SYMBOL_INFO*>(buf);
-  symbol->SizeOfStruct = sizeof(SYMBOL_INFO);
-  symbol->MaxNameLen = MAX_SYM_NAME;
-  if (!SymFromAddr(process, reinterpret_cast<DWORD64>(pc), nullptr, symbol)) {
-    return false;
-  }
-  strncpy(out, symbol->Name, out_size);
-  if (out[out_size - 1] != '\0') {
-    // strncpy() does not '\0' terminate when it truncates.
-    static constexpr char kEllipsis[] = "...";
-    int ellipsis_size =
-        std::min<int>(sizeof(kEllipsis) - 1, out_size - 1);
-    memcpy(out + out_size - ellipsis_size - 1, kEllipsis, ellipsis_size);
-    out[out_size - 1] = '\0';
-  }
-  return true;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/BUILD.bazel b/third_party/abseil/absl/flags/BUILD.bazel
deleted file mode 100644
index 1937609..0000000
--- a/third_party/abseil/absl/flags/BUILD.bazel
+++ /dev/null
@@ -1,538 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "path_util",
-    hdrs = [
-        "internal/path_util.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/flags:__pkg__",
-    ],
-    deps = [
-        "//absl/base:config",
-        "//absl/strings",
-    ],
-)
-
-cc_library(
-    name = "program_name",
-    srcs = [
-        "internal/program_name.cc",
-    ],
-    hdrs = [
-        "internal/program_name.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/flags:__pkg__",
-    ],
-    deps = [
-        ":path_util",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/strings",
-        "//absl/synchronization",
-    ],
-)
-
-cc_library(
-    name = "config",
-    srcs = [
-        "usage_config.cc",
-    ],
-    hdrs = [
-        "config.h",
-        "usage_config.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":path_util",
-        ":program_name",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/strings",
-        "//absl/synchronization",
-    ],
-)
-
-cc_library(
-    name = "marshalling",
-    srcs = [
-        "marshalling.cc",
-    ],
-    hdrs = [
-        "marshalling.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:log_severity",
-        "//absl/strings",
-        "//absl/strings:str_format",
-    ],
-)
-
-cc_library(
-    name = "commandlineflag_internal",
-    srcs = [
-        "internal/commandlineflag.cc",
-    ],
-    hdrs = [
-        "internal/commandlineflag.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:fast_type_id",
-    ],
-)
-
-cc_library(
-    name = "commandlineflag",
-    srcs = [
-        "commandlineflag.cc",
-    ],
-    hdrs = [
-        "commandlineflag.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":commandlineflag_internal",
-        "//absl/base:config",
-        "//absl/base:fast_type_id",
-        "//absl/strings",
-        "//absl/types:optional",
-    ],
-)
-
-cc_library(
-    name = "private_handle_accessor",
-    srcs = [
-        "internal/private_handle_accessor.cc",
-    ],
-    hdrs = [
-        "internal/private_handle_accessor.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/flags:__pkg__",
-    ],
-    deps = [
-        ":commandlineflag",
-        ":commandlineflag_internal",
-        "//absl/base:config",
-        "//absl/strings",
-    ],
-)
-
-cc_library(
-    name = "reflection",
-    srcs = [
-        "reflection.cc",
-    ],
-    hdrs = [
-        "internal/registry.h",
-        "reflection.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":commandlineflag",
-        ":commandlineflag_internal",
-        ":config",
-        ":private_handle_accessor",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/container:flat_hash_map",
-        "//absl/strings",
-        "//absl/synchronization",
-    ],
-)
-
-cc_library(
-    name = "flag_internal",
-    srcs = [
-        "internal/flag.cc",
-    ],
-    hdrs = [
-        "internal/flag.h",
-        "internal/sequence_lock.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//absl/base:__subpackages__"],
-    deps = [
-        ":commandlineflag",
-        ":commandlineflag_internal",
-        ":config",
-        ":marshalling",
-        ":reflection",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/synchronization",
-        "//absl/utility",
-    ],
-)
-
-cc_library(
-    name = "flag",
-    srcs = [
-        "flag.cc",
-    ],
-    hdrs = [
-        "declare.h",
-        "flag.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":flag_internal",
-        ":reflection",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/strings",
-    ],
-)
-
-cc_library(
-    name = "usage_internal",
-    srcs = [
-        "internal/usage.cc",
-    ],
-    hdrs = [
-        "internal/usage.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/flags:__pkg__",
-    ],
-    deps = [
-        ":commandlineflag",
-        ":config",
-        ":flag",
-        ":flag_internal",
-        ":path_util",
-        ":private_handle_accessor",
-        ":program_name",
-        ":reflection",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/strings",
-    ],
-)
-
-cc_library(
-    name = "usage",
-    srcs = [
-        "usage.cc",
-    ],
-    hdrs = [
-        "usage.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":usage_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/strings",
-        "//absl/synchronization",
-    ],
-)
-
-cc_library(
-    name = "parse",
-    srcs = ["parse.cc"],
-    hdrs = [
-        "internal/parse.h",
-        "parse.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":commandlineflag",
-        ":commandlineflag_internal",
-        ":config",
-        ":flag",
-        ":flag_internal",
-        ":private_handle_accessor",
-        ":program_name",
-        ":reflection",
-        ":usage",
-        ":usage_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/strings",
-        "//absl/synchronization",
-    ],
-)
-
-############################################################################
-# Unit tests in alphabetical order.
-
-cc_test(
-    name = "commandlineflag_test",
-    size = "small",
-    srcs = [
-        "commandlineflag_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":commandlineflag",
-        ":commandlineflag_internal",
-        ":config",
-        ":flag",
-        ":private_handle_accessor",
-        ":reflection",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "config_test",
-    size = "small",
-    srcs = [
-        "config_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "flag_test",
-    size = "small",
-    srcs = [
-        "flag_test.cc",
-        "flag_test_defs.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":flag",
-        ":flag_internal",
-        ":marshalling",
-        ":reflection",
-        "//absl/base:core_headers",
-        "//absl/base:malloc_internal",
-        "//absl/strings",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "flag_benchmark",
-    testonly = 1,
-    srcs = [
-        "flag_benchmark.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = select({
-        "//conditions:default": [],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        "flag_benchmark.lds",
-        ":flag",
-        ":marshalling",
-        ":parse",
-        ":reflection",
-        "//absl/strings",
-        "//absl/time",
-        "//absl/types:optional",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "marshalling_test",
-    size = "small",
-    srcs = [
-        "marshalling_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":marshalling",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "parse_test",
-    size = "small",
-    srcs = [
-        "parse_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":flag",
-        ":parse",
-        ":reflection",
-        ":usage_internal",
-        "//absl/base:raw_logging_internal",
-        "//absl/base:scoped_set_env",
-        "//absl/strings",
-        "//absl/types:span",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "path_util_test",
-    size = "small",
-    srcs = [
-        "internal/path_util_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":path_util",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "program_name_test",
-    size = "small",
-    srcs = [
-        "internal/program_name_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":program_name",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "reflection_test",
-    size = "small",
-    srcs = [
-        "reflection_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":commandlineflag_internal",
-        ":flag",
-        ":marshalling",
-        ":reflection",
-        ":usage_internal",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "sequence_lock_test",
-    size = "small",
-    timeout = "moderate",
-    srcs = [
-        "internal/sequence_lock_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    shard_count = 32,
-    deps = [
-        ":flag_internal",
-        "//absl/base",
-        "//absl/container:fixed_array",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "usage_config_test",
-    size = "small",
-    srcs = [
-        "usage_config_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":path_util",
-        ":program_name",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "usage_test",
-    size = "small",
-    srcs = [
-        "internal/usage_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":config",
-        ":flag",
-        ":parse",
-        ":path_util",
-        ":program_name",
-        ":reflection",
-        ":usage",
-        ":usage_internal",
-        "//absl/strings",
-        "@com_google_googletest//:gtest",
-    ],
-)
diff --git a/third_party/abseil/absl/flags/CMakeLists.txt b/third_party/abseil/absl/flags/CMakeLists.txt
deleted file mode 100644
index caac69c..0000000
--- a/third_party/abseil/absl/flags/CMakeLists.txt
+++ /dev/null
@@ -1,466 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    flags_path_util
-  HDRS
-    "internal/path_util.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::strings
-  PUBLIC
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    flags_program_name
-  SRCS
-    "internal/program_name.cc"
-  HDRS
-    "internal/program_name.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::flags_path_util
-    absl::strings
-    absl::synchronization
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    flags_config
-  SRCS
-    "usage_config.cc"
-  HDRS
-    "config.h"
-    "usage_config.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::flags_path_util
-    absl::flags_program_name
-    absl::core_headers
-    absl::strings
-    absl::synchronization
-)
-
-absl_cc_library(
-  NAME
-    flags_marshalling
-  SRCS
-    "marshalling.cc"
-  HDRS
-    "marshalling.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::log_severity
-    absl::strings
-    absl::str_format
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    flags_commandlineflag_internal
-  SRCS
-    "internal/commandlineflag.cc"
-  HDRS
-    "internal/commandlineflag.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::fast_type_id
-)
-
-absl_cc_library(
-  NAME
-    flags_commandlineflag
-  SRCS
-    "commandlineflag.cc"
-  HDRS
-    "commandlineflag.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::fast_type_id
-    absl::flags_commandlineflag_internal
-    absl::optional
-    absl::strings
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    flags_private_handle_accessor
-  SRCS
-    "internal/private_handle_accessor.cc"
-  HDRS
-    "internal/private_handle_accessor.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::flags_commandlineflag
-    absl::flags_commandlineflag_internal
-    absl::strings
-)
-
-absl_cc_library(
-  NAME
-    flags_reflection
-  SRCS
-    "reflection.cc"
-  HDRS
-    "reflection.h"
-    "internal/registry.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::flags_commandlineflag
-    absl::flags_private_handle_accessor
-    absl::flags_config
-    absl::strings
-    absl::synchronization
-    absl::flat_hash_map
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    flags_internal
-  SRCS
-    "internal/flag.cc"
-  HDRS
-    "internal/flag.h"
-    "internal/sequence_lock.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::base
-    absl::config
-    absl::flags_commandlineflag
-    absl::flags_commandlineflag_internal
-    absl::flags_config
-    absl::flags_marshalling
-    absl::synchronization
-    absl::meta
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    flags
-  SRCS
-    "flag.cc"
-  HDRS
-    "declare.h"
-    "flag.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::flags_commandlineflag
-    absl::flags_config
-    absl::flags_internal
-    absl::flags_reflection
-    absl::base
-    absl::core_headers
-    absl::strings
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    flags_usage_internal
-  SRCS
-    "internal/usage.cc"
-  HDRS
-    "internal/usage.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::flags_config
-    absl::flags
-    absl::flags_commandlineflag
-    absl::flags_internal
-    absl::flags_path_util
-    absl::flags_private_handle_accessor
-    absl::flags_program_name
-    absl::flags_reflection
-    absl::strings
-    absl::synchronization
-)
-
-absl_cc_library(
-  NAME
-    flags_usage
-  SRCS
-    "usage.cc"
-  HDRS
-    "usage.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::flags_usage_internal
-    absl::strings
-    absl::synchronization
-)
-
-absl_cc_library(
-  NAME
-    flags_parse
-  SRCS
-    "parse.cc"
-  HDRS
-    "internal/parse.h"
-    "parse.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::flags_config
-    absl::flags
-    absl::flags_commandlineflag
-    absl::flags_commandlineflag_internal
-    absl::flags_internal
-    absl::flags_private_handle_accessor
-    absl::flags_program_name
-    absl::flags_reflection
-    absl::flags_usage
-    absl::strings
-    absl::synchronization
-)
-
-############################################################################
-# Unit tests in alpahabetical order.
-
-absl_cc_test(
-  NAME
-    flags_commandlineflag_test
-  SRCS
-    "commandlineflag_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags
-    absl::flags_commandlineflag
-    absl::flags_commandlineflag_internal
-    absl::flags_config
-    absl::flags_private_handle_accessor
-    absl::flags_reflection
-    absl::memory
-    absl::strings
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_config_test
-  SRCS
-    "config_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_config
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_flag_test
-  SRCS
-    "flag_test.cc"
-    "flag_test_defs.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::core_headers
-    absl::flags
-    absl::flags_config
-    absl::flags_internal
-    absl::flags_marshalling
-    absl::flags_reflection
-    absl::strings
-    absl::time
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_marshalling_test
-  SRCS
-    "marshalling_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_marshalling
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_parse_test
-  SRCS
-    "parse_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags
-    absl::flags_parse
-    absl::flags_reflection
-    absl::flags_usage_internal
-    absl::raw_logging_internal
-    absl::scoped_set_env
-    absl::span
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    flags_path_util_test
-  SRCS
-    "internal/path_util_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_path_util
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_program_name_test
-  SRCS
-    "internal/program_name_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_program_name
-    absl::strings
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_reflection_test
-  SRCS
-    "reflection_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_commandlineflag_internal
-    absl::flags
-    absl::flags_reflection
-    absl::flags_usage
-    absl::memory
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    flags_sequence_lock_test
-  SRCS
-    "internal/sequence_lock_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::flags_internal
-    absl::time
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    flags_usage_config_test
-  SRCS
-    "usage_config_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_config
-    absl::flags_path_util
-    absl::flags_program_name
-    absl::strings
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    flags_usage_test
-  SRCS
-    "internal/usage_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::flags_config
-    absl::flags
-    absl::flags_path_util
-    absl::flags_program_name
-    absl::flags_parse
-    absl::flags_reflection
-    absl::flags_usage
-    absl::strings
-    gtest
-)
diff --git a/third_party/abseil/absl/flags/commandlineflag.cc b/third_party/abseil/absl/flags/commandlineflag.cc
deleted file mode 100644
index 9f3b4a5..0000000
--- a/third_party/abseil/absl/flags/commandlineflag.cc
+++ /dev/null
@@ -1,34 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/commandlineflag.h"
-
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-bool CommandLineFlag::IsRetired() const { return false; }
-bool CommandLineFlag::ParseFrom(absl::string_view value, std::string* error) {
-  return ParseFrom(value, flags_internal::SET_FLAGS_VALUE,
-                   flags_internal::kProgrammaticChange, *error);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/commandlineflag.h b/third_party/abseil/absl/flags/commandlineflag.h
deleted file mode 100644
index f2fa089..0000000
--- a/third_party/abseil/absl/flags/commandlineflag.h
+++ /dev/null
@@ -1,200 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: commandlineflag.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `CommandLineFlag`, which acts as a type-erased
-// handle for accessing metadata about the Abseil Flag in question.
-//
-// Because an actual Abseil flag is of an unspecified type, you should not
-// manipulate or interact directly with objects of that type. Instead, use the
-// CommandLineFlag type as an intermediary.
-#ifndef ABSL_FLAGS_COMMANDLINEFLAG_H_
-#define ABSL_FLAGS_COMMANDLINEFLAG_H_
-
-#include <memory>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-class PrivateHandleAccessor;
-}  // namespace flags_internal
-
-// CommandLineFlag
-//
-// This type acts as a type-erased handle for an instance of an Abseil Flag and
-// holds reflection information pertaining to that flag. Use CommandLineFlag to
-// access a flag's name, location, help string etc.
-//
-// To obtain an absl::CommandLineFlag, invoke `absl::FindCommandLineFlag()`
-// passing it the flag name string.
-//
-// Example:
-//
-//   // Obtain reflection handle for a flag named "flagname".
-//   const absl::CommandLineFlag* my_flag_data =
-//        absl::FindCommandLineFlag("flagname");
-//
-//   // Now you can get flag info from that reflection handle.
-//   std::string flag_location = my_flag_data->Filename();
-//   ...
-class CommandLineFlag {
- public:
-  constexpr CommandLineFlag() = default;
-
-  // Not copyable/assignable.
-  CommandLineFlag(const CommandLineFlag&) = delete;
-  CommandLineFlag& operator=(const CommandLineFlag&) = delete;
-
-  // absl::CommandLineFlag::IsOfType()
-  //
-  // Return true iff flag has type T.
-  template <typename T>
-  inline bool IsOfType() const {
-    return TypeId() == base_internal::FastTypeId<T>();
-  }
-
-  // absl::CommandLineFlag::TryGet()
-  //
-  // Attempts to retrieve the flag value. Returns value on success,
-  // absl::nullopt otherwise.
-  template <typename T>
-  absl::optional<T> TryGet() const {
-    if (IsRetired() || !IsOfType<T>()) {
-      return absl::nullopt;
-    }
-
-    // Implementation notes:
-    //
-    // We are wrapping a union around the value of `T` to serve three purposes:
-    //
-    //  1. `U.value` has correct size and alignment for a value of type `T`
-    //  2. The `U.value` constructor is not invoked since U's constructor does
-    //     not do it explicitly.
-    //  3. The `U.value` destructor is invoked since U's destructor does it
-    //     explicitly. This makes `U` a kind of RAII wrapper around non default
-    //     constructible value of T, which is destructed when we leave the
-    //     scope. We do need to destroy U.value, which is constructed by
-    //     CommandLineFlag::Read even though we left it in a moved-from state
-    //     after std::move.
-    //
-    // All of this serves to avoid requiring `T` being default constructible.
-    union U {
-      T value;
-      U() {}
-      ~U() { value.~T(); }
-    };
-    U u;
-
-    Read(&u.value);
-    // allow retired flags to be "read", so we can report invalid access.
-    if (IsRetired()) {
-      return absl::nullopt;
-    }
-    return std::move(u.value);
-  }
-
-  // absl::CommandLineFlag::Name()
-  //
-  // Returns name of this flag.
-  virtual absl::string_view Name() const = 0;
-
-  // absl::CommandLineFlag::Filename()
-  //
-  // Returns name of the file where this flag is defined.
-  virtual std::string Filename() const = 0;
-
-  // absl::CommandLineFlag::Help()
-  //
-  // Returns help message associated with this flag.
-  virtual std::string Help() const = 0;
-
-  // absl::CommandLineFlag::IsRetired()
-  //
-  // Returns true iff this object corresponds to retired flag.
-  virtual bool IsRetired() const;
-
-  // absl::CommandLineFlag::DefaultValue()
-  //
-  // Returns the default value for this flag.
-  virtual std::string DefaultValue() const = 0;
-
-  // absl::CommandLineFlag::CurrentValue()
-  //
-  // Returns the current value for this flag.
-  virtual std::string CurrentValue() const = 0;
-
-  // absl::CommandLineFlag::ParseFrom()
-  //
-  // Sets the value of the flag based on specified string `value`. If the flag
-  // was successfully set to new value, it returns true. Otherwise, sets `error`
-  // to indicate the error, leaves the flag unchanged, and returns false.
-  bool ParseFrom(absl::string_view value, std::string* error);
-
- protected:
-  ~CommandLineFlag() = default;
-
- private:
-  friend class flags_internal::PrivateHandleAccessor;
-
-  // Sets the value of the flag based on specified string `value`. If the flag
-  // was successfully set to new value, it returns true. Otherwise, sets `error`
-  // to indicate the error, leaves the flag unchanged, and returns false. There
-  // are three ways to set the flag's value:
-  //  * Update the current flag value
-  //  * Update the flag's default value
-  //  * Update the current flag value if it was never set before
-  // The mode is selected based on `set_mode` parameter.
-  virtual bool ParseFrom(absl::string_view value,
-                         flags_internal::FlagSettingMode set_mode,
-                         flags_internal::ValueSource source,
-                         std::string& error) = 0;
-
-  // Returns id of the flag's value type.
-  virtual flags_internal::FlagFastTypeId TypeId() const = 0;
-
-  // Interface to save flag to some persistent state. Returns current flag state
-  // or nullptr if flag does not support saving and restoring a state.
-  virtual std::unique_ptr<flags_internal::FlagStateInterface> SaveState() = 0;
-
-  // Copy-construct a new value of the flag's type in a memory referenced by
-  // the dst based on the current flag's value.
-  virtual void Read(void* dst) const = 0;
-
-  // To be deleted. Used to return true if flag's current value originated from
-  // command line.
-  virtual bool IsSpecifiedOnCommandLine() const = 0;
-
-  // Validates supplied value usign validator or parseflag routine
-  virtual bool ValidateInputValue(absl::string_view value) const = 0;
-
-  // Checks that flags default value can be converted to string and back to the
-  // flag's value type.
-  virtual void CheckDefaultValueParsingRoundtrip() const = 0;
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_COMMANDLINEFLAG_H_
diff --git a/third_party/abseil/absl/flags/commandlineflag_test.cc b/third_party/abseil/absl/flags/commandlineflag_test.cc
deleted file mode 100644
index 585db4b..0000000
--- a/third_party/abseil/absl/flags/commandlineflag_test.cc
+++ /dev/null
@@ -1,231 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/commandlineflag.h"
-
-#include <memory>
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/flags/flag.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/flags/internal/private_handle_accessor.h"
-#include "absl/flags/reflection.h"
-#include "absl/flags/usage_config.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/match.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-
-ABSL_FLAG(int, int_flag, 201, "int_flag help");
-ABSL_FLAG(std::string, string_flag, "dflt",
-          absl::StrCat("string_flag", " help"));
-ABSL_RETIRED_FLAG(bool, bool_retired_flag, false, "bool_retired_flag help");
-
-// These are only used to test default values.
-ABSL_FLAG(int, int_flag2, 201, "");
-ABSL_FLAG(std::string, string_flag2, "dflt", "");
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-class CommandLineFlagTest : public testing::Test {
- protected:
-  static void SetUpTestSuite() {
-    // Install a function to normalize filenames before this test is run.
-    absl::FlagsUsageConfig default_config;
-    default_config.normalize_filename = &CommandLineFlagTest::NormalizeFileName;
-    absl::SetFlagsUsageConfig(default_config);
-  }
-
-  void SetUp() override { flag_saver_ = absl::make_unique<absl::FlagSaver>(); }
-  void TearDown() override { flag_saver_.reset(); }
-
- private:
-  static std::string NormalizeFileName(absl::string_view fname) {
-#ifdef _WIN32
-    std::string normalized(fname);
-    std::replace(normalized.begin(), normalized.end(), '\\', '/');
-    fname = normalized;
-#endif
-    return std::string(fname);
-  }
-
-  std::unique_ptr<absl::FlagSaver> flag_saver_;
-};
-
-TEST_F(CommandLineFlagTest, TestAttributesAccessMethods) {
-  auto* flag_01 = absl::FindCommandLineFlag("int_flag");
-
-  ASSERT_TRUE(flag_01);
-  EXPECT_EQ(flag_01->Name(), "int_flag");
-  EXPECT_EQ(flag_01->Help(), "int_flag help");
-  EXPECT_TRUE(!flag_01->IsRetired());
-  EXPECT_TRUE(flag_01->IsOfType<int>());
-  EXPECT_TRUE(!flag_01->IsOfType<bool>());
-  EXPECT_TRUE(!flag_01->IsOfType<std::string>());
-  EXPECT_TRUE(absl::EndsWith(flag_01->Filename(),
-                             "absl/flags/commandlineflag_test.cc"))
-      << flag_01->Filename();
-
-  auto* flag_02 = absl::FindCommandLineFlag("string_flag");
-
-  ASSERT_TRUE(flag_02);
-  EXPECT_EQ(flag_02->Name(), "string_flag");
-  EXPECT_EQ(flag_02->Help(), "string_flag help");
-  EXPECT_TRUE(!flag_02->IsRetired());
-  EXPECT_TRUE(flag_02->IsOfType<std::string>());
-  EXPECT_TRUE(!flag_02->IsOfType<bool>());
-  EXPECT_TRUE(!flag_02->IsOfType<int>());
-  EXPECT_TRUE(absl::EndsWith(flag_02->Filename(),
-                             "absl/flags/commandlineflag_test.cc"))
-      << flag_02->Filename();
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(CommandLineFlagTest, TestValueAccessMethods) {
-  absl::SetFlag(&FLAGS_int_flag2, 301);
-  auto* flag_01 = absl::FindCommandLineFlag("int_flag2");
-
-  ASSERT_TRUE(flag_01);
-  EXPECT_EQ(flag_01->CurrentValue(), "301");
-  EXPECT_EQ(flag_01->DefaultValue(), "201");
-
-  absl::SetFlag(&FLAGS_string_flag2, "new_str_value");
-  auto* flag_02 = absl::FindCommandLineFlag("string_flag2");
-
-  ASSERT_TRUE(flag_02);
-  EXPECT_EQ(flag_02->CurrentValue(), "new_str_value");
-  EXPECT_EQ(flag_02->DefaultValue(), "dflt");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(CommandLineFlagTest, TestParseFromCurrentValue) {
-  std::string err;
-
-  auto* flag_01 = absl::FindCommandLineFlag("int_flag");
-  EXPECT_FALSE(
-      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "11", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 11);
-  EXPECT_FALSE(
-      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "-123", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), -123);
-  EXPECT_FALSE(
-      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "xyz", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), -123);
-  EXPECT_EQ(err, "Illegal value 'xyz' specified for flag 'int_flag'");
-  EXPECT_FALSE(
-      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "A1", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), -123);
-  EXPECT_EQ(err, "Illegal value 'A1' specified for flag 'int_flag'");
-  EXPECT_FALSE(
-      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "0x10", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 16);
-  EXPECT_FALSE(
-      flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "011", flags::SET_FLAGS_VALUE, flags::kCommandLine, err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 11);
-  EXPECT_TRUE(flags::PrivateHandleAccessor::IsSpecifiedOnCommandLine(*flag_01));
-
-  EXPECT_TRUE(!flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, err));
-  EXPECT_EQ(err, "Illegal value '' specified for flag 'int_flag'");
-
-  auto* flag_02 = absl::FindCommandLineFlag("string_flag");
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_02, "xyz", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "xyz");
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_02, "", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange, err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(CommandLineFlagTest, TestParseFromDefaultValue) {
-  std::string err;
-
-  auto* flag_01 = absl::FindCommandLineFlag("int_flag");
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "111", flags::SET_FLAGS_DEFAULT, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(flag_01->DefaultValue(), "111");
-
-  auto* flag_02 = absl::FindCommandLineFlag("string_flag");
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_02, "abc", flags::SET_FLAGS_DEFAULT, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(flag_02->DefaultValue(), "abc");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(CommandLineFlagTest, TestParseFromIfDefault) {
-  std::string err;
-
-  auto* flag_01 = absl::FindCommandLineFlag("int_flag");
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "22", flags::SET_FLAG_IF_DEFAULT, flags::kProgrammaticChange,
-      err))
-      << err;
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 22);
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "33", flags::SET_FLAG_IF_DEFAULT, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 22);
-  // EXPECT_EQ(err, "ERROR: int_flag is already set to 22");
-
-  // Reset back to default value
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "201", flags::SET_FLAGS_VALUE, flags::kProgrammaticChange,
-      err));
-
-  EXPECT_TRUE(flags::PrivateHandleAccessor::ParseFrom(
-      *flag_01, "33", flags::SET_FLAG_IF_DEFAULT, flags::kProgrammaticChange,
-      err));
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 201);
-  // EXPECT_EQ(err, "ERROR: int_flag is already set to 201");
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/config.h b/third_party/abseil/absl/flags/config.h
deleted file mode 100644
index 5ab1f31..0000000
--- a/third_party/abseil/absl/flags/config.h
+++ /dev/null
@@ -1,76 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_CONFIG_H_
-#define ABSL_FLAGS_CONFIG_H_
-
-// Determine if we should strip string literals from the Flag objects.
-// By default we strip string literals on mobile platforms.
-#if !defined(ABSL_FLAGS_STRIP_NAMES)
-
-#if defined(__ANDROID__)
-#define ABSL_FLAGS_STRIP_NAMES 1
-
-#elif defined(__APPLE__)
-#include <TargetConditionals.h>
-#if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
-#define ABSL_FLAGS_STRIP_NAMES 1
-#elif defined(TARGET_OS_EMBEDDED) && TARGET_OS_EMBEDDED
-#define ABSL_FLAGS_STRIP_NAMES 1
-#endif  // TARGET_OS_*
-#endif
-
-#endif  // !defined(ABSL_FLAGS_STRIP_NAMES)
-
-#if !defined(ABSL_FLAGS_STRIP_NAMES)
-// If ABSL_FLAGS_STRIP_NAMES wasn't set on the command line or above,
-// the default is not to strip.
-#define ABSL_FLAGS_STRIP_NAMES 0
-#endif
-
-#if !defined(ABSL_FLAGS_STRIP_HELP)
-// By default, if we strip names, we also strip help.
-#define ABSL_FLAGS_STRIP_HELP ABSL_FLAGS_STRIP_NAMES
-#endif
-
-// ABSL_FLAGS_INTERNAL_HAS_RTTI macro is used for selecting if we can use RTTI
-// for flag type identification.
-#ifdef ABSL_FLAGS_INTERNAL_HAS_RTTI
-#error ABSL_FLAGS_INTERNAL_HAS_RTTI cannot be directly set
-#elif !defined(__GNUC__) || defined(__GXX_RTTI)
-#define ABSL_FLAGS_INTERNAL_HAS_RTTI 1
-#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
-
-// These macros represent the "source of truth" for the list of supported
-// built-in types.
-#define ABSL_FLAGS_INTERNAL_BUILTIN_TYPES(A) \
-  A(bool, bool)                              \
-  A(short, short)                            \
-  A(unsigned short, unsigned_short)          \
-  A(int, int)                                \
-  A(unsigned int, unsigned_int)              \
-  A(long, long)                              \
-  A(unsigned long, unsigned_long)            \
-  A(long long, long_long)                    \
-  A(unsigned long long, unsigned_long_long)  \
-  A(double, double)                          \
-  A(float, float)
-
-#define ABSL_FLAGS_INTERNAL_SUPPORTED_TYPES(A) \
-  ABSL_FLAGS_INTERNAL_BUILTIN_TYPES(A)         \
-  A(std::string, std_string)                   \
-  A(std::vector<std::string>, std_vector_of_string)
-
-#endif  // ABSL_FLAGS_CONFIG_H_
diff --git a/third_party/abseil/absl/flags/config_test.cc b/third_party/abseil/absl/flags/config_test.cc
deleted file mode 100644
index 6389986..0000000
--- a/third_party/abseil/absl/flags/config_test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/config.h"
-
-#ifdef __APPLE__
-#include <TargetConditionals.h>
-#endif
-
-#include "gtest/gtest.h"
-
-#ifndef ABSL_FLAGS_STRIP_NAMES
-#error ABSL_FLAGS_STRIP_NAMES is not defined
-#endif
-
-#ifndef ABSL_FLAGS_STRIP_HELP
-#error ABSL_FLAGS_STRIP_HELP is not defined
-#endif
-
-namespace {
-
-// Test that ABSL_FLAGS_STRIP_NAMES and ABSL_FLAGS_STRIP_HELP are configured how
-// we expect them to be configured by default. If you override this
-// configuration, this test will fail, but the code should still be safe to use.
-TEST(FlagsConfigTest, Test) {
-#if defined(__ANDROID__)
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 1);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 1);
-#elif defined(__myriad2__)
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 0);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 0);
-#elif defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 1);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 1);
-#elif defined(TARGET_OS_EMBEDDED) && TARGET_OS_EMBEDDED
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 1);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 1);
-#elif defined(__APPLE__)
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 0);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 0);
-#elif defined(_WIN32)
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 0);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 0);
-#elif defined(__linux__)
-  EXPECT_EQ(ABSL_FLAGS_STRIP_NAMES, 0);
-  EXPECT_EQ(ABSL_FLAGS_STRIP_HELP, 0);
-#endif
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/declare.h b/third_party/abseil/absl/flags/declare.h
deleted file mode 100644
index b9794d8..0000000
--- a/third_party/abseil/absl/flags/declare.h
+++ /dev/null
@@ -1,65 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: declare.h
-// -----------------------------------------------------------------------------
-//
-// This file defines the ABSL_DECLARE_FLAG macro, allowing you to declare an
-// `absl::Flag` for use within a translation unit. You should place this
-// declaration within the header file associated with the .cc file that defines
-// and owns the `Flag`.
-
-#ifndef ABSL_FLAGS_DECLARE_H_
-#define ABSL_FLAGS_DECLARE_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// absl::Flag<T> represents a flag of type 'T' created by ABSL_FLAG.
-template <typename T>
-class Flag;
-
-}  // namespace flags_internal
-
-// Flag
-//
-// Forward declaration of the `absl::Flag` type for use in defining the macro.
-#if defined(_MSC_VER) && !defined(__clang__)
-template <typename T>
-class Flag;
-#else
-template <typename T>
-using Flag = flags_internal::Flag<T>;
-#endif
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// ABSL_DECLARE_FLAG()
-//
-// This macro is a convenience for declaring use of an `absl::Flag` within a
-// translation unit. This macro should be used within a header file to
-// declare usage of the flag within any .cc file including that header file.
-//
-// The ABSL_DECLARE_FLAG(type, name) macro expands to:
-//
-//   extern absl::Flag<type> FLAGS_name;
-#define ABSL_DECLARE_FLAG(type, name) extern ::absl::Flag<type> FLAGS_##name
-
-#endif  // ABSL_FLAGS_DECLARE_H_
diff --git a/third_party/abseil/absl/flags/flag.cc b/third_party/abseil/absl/flags/flag.cc
deleted file mode 100644
index 531df12..0000000
--- a/third_party/abseil/absl/flags/flag.cc
+++ /dev/null
@@ -1,38 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/flag.h"
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// This global mutex protects on-demand construction of flag objects in MSVC
-// builds.
-#if defined(_MSC_VER) && !defined(__clang__)
-
-namespace flags_internal {
-
-ABSL_CONST_INIT static absl::Mutex construction_guard(absl::kConstInit);
-
-absl::Mutex* GetGlobalConstructionGuard() { return &construction_guard; }
-
-}  // namespace flags_internal
-
-#endif
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/flag.h b/third_party/abseil/absl/flags/flag.h
deleted file mode 100644
index a9cb2b7..0000000
--- a/third_party/abseil/absl/flags/flag.h
+++ /dev/null
@@ -1,396 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: flag.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::Flag<T>` type for holding command-line
-// flag data, and abstractions to create, get and set such flag data.
-//
-// It is important to note that this type is **unspecified** (an implementation
-// detail) and you do not construct or manipulate actual `absl::Flag<T>`
-// instances. Instead, you define and declare flags using the
-// `ABSL_FLAG()` and `ABSL_DECLARE_FLAG()` macros, and get and set flag values
-// using the `absl::GetFlag()` and `absl::SetFlag()` functions.
-
-#ifndef ABSL_FLAGS_FLAG_H_
-#define ABSL_FLAGS_FLAG_H_
-
-#include <string>
-#include <type_traits>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/optimization.h"
-#include "absl/flags/config.h"
-#include "absl/flags/internal/flag.h"
-#include "absl/flags/internal/registry.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Flag
-//
-// An `absl::Flag` holds a command-line flag value, providing a runtime
-// parameter to a binary. Such flags should be defined in the global namespace
-// and (preferably) in the module containing the binary's `main()` function.
-//
-// You should not construct and cannot use the `absl::Flag` type directly;
-// instead, you should declare flags using the `ABSL_DECLARE_FLAG()` macro
-// within a header file, and define your flag using `ABSL_FLAG()` within your
-// header's associated `.cc` file. Such flags will be named `FLAGS_name`.
-//
-// Example:
-//
-//    .h file
-//
-//      // Declares usage of a flag named "FLAGS_count"
-//      ABSL_DECLARE_FLAG(int, count);
-//
-//    .cc file
-//
-//      // Defines a flag named "FLAGS_count" with a default `int` value of 0.
-//      ABSL_FLAG(int, count, 0, "Count of items to process");
-//
-// No public methods of `absl::Flag<T>` are part of the Abseil Flags API.
-#if !defined(_MSC_VER) || defined(__clang__)
-template <typename T>
-using Flag = flags_internal::Flag<T>;
-#else
-// MSVC debug builds do not implement initialization with constexpr constructors
-// correctly. To work around this we add a level of indirection, so that the
-// class `absl::Flag` contains an `internal::Flag*` (instead of being an alias
-// to that class) and dynamically allocates an instance when necessary. We also
-// forward all calls to internal::Flag methods via trampoline methods. In this
-// setup the `absl::Flag` class does not have constructor and virtual methods,
-// all the data members are public and thus MSVC is able to initialize it at
-// link time. To deal with multiple threads accessing the flag for the first
-// time concurrently we use an atomic boolean indicating if flag object is
-// initialized. We also employ the double-checked locking pattern where the
-// second level of protection is a global Mutex, so if two threads attempt to
-// construct the flag concurrently only one wins.
-// This solution is based on a recomendation here:
-// https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html?childToView=648454#comment-648454
-
-namespace flags_internal {
-absl::Mutex* GetGlobalConstructionGuard();
-}  // namespace flags_internal
-
-template <typename T>
-class Flag {
- public:
-  // No constructor and destructor to ensure this is an aggregate type.
-  // Visual Studio 2015 still requires the constructor for class to be
-  // constexpr initializable.
-#if _MSC_VER <= 1900
-  constexpr Flag(const char* name, const char* filename,
-                 const flags_internal::HelpGenFunc help_gen,
-                 const flags_internal::FlagDfltGenFunc default_value_gen)
-      : name_(name),
-        filename_(filename),
-        help_gen_(help_gen),
-        default_value_gen_(default_value_gen),
-        inited_(false),
-        impl_(nullptr) {}
-#endif
-
-  flags_internal::Flag<T>& GetImpl() const {
-    if (!inited_.load(std::memory_order_acquire)) {
-      absl::MutexLock l(flags_internal::GetGlobalConstructionGuard());
-
-      if (inited_.load(std::memory_order_acquire)) {
-        return *impl_;
-      }
-
-      impl_ = new flags_internal::Flag<T>(
-          name_, filename_,
-          {flags_internal::FlagHelpMsg(help_gen_),
-           flags_internal::FlagHelpKind::kGenFunc},
-          {flags_internal::FlagDefaultSrc(default_value_gen_),
-           flags_internal::FlagDefaultKind::kGenFunc});
-      inited_.store(true, std::memory_order_release);
-    }
-
-    return *impl_;
-  }
-
-  // Public methods of `absl::Flag<T>` are NOT part of the Abseil Flags API.
-  // See https://abseil.io/docs/cpp/guides/flags
-  bool IsRetired() const { return GetImpl().IsRetired(); }
-  absl::string_view Name() const { return GetImpl().Name(); }
-  std::string Help() const { return GetImpl().Help(); }
-  bool IsModified() const { return GetImpl().IsModified(); }
-  bool IsSpecifiedOnCommandLine() const {
-    return GetImpl().IsSpecifiedOnCommandLine();
-  }
-  std::string Filename() const { return GetImpl().Filename(); }
-  std::string DefaultValue() const { return GetImpl().DefaultValue(); }
-  std::string CurrentValue() const { return GetImpl().CurrentValue(); }
-  template <typename U>
-  inline bool IsOfType() const {
-    return GetImpl().template IsOfType<U>();
-  }
-  T Get() const {
-    return flags_internal::FlagImplPeer::InvokeGet<T>(GetImpl());
-  }
-  void Set(const T& v) {
-    flags_internal::FlagImplPeer::InvokeSet(GetImpl(), v);
-  }
-  void InvokeCallback() { GetImpl().InvokeCallback(); }
-
-  const CommandLineFlag& Reflect() const {
-    return flags_internal::FlagImplPeer::InvokeReflect(GetImpl());
-  }
-
-  // The data members are logically private, but they need to be public for
-  // this to be an aggregate type.
-  const char* name_;
-  const char* filename_;
-  const flags_internal::HelpGenFunc help_gen_;
-  const flags_internal::FlagDfltGenFunc default_value_gen_;
-
-  mutable std::atomic<bool> inited_;
-  mutable flags_internal::Flag<T>* impl_;
-};
-#endif
-
-// GetFlag()
-//
-// Returns the value (of type `T`) of an `absl::Flag<T>` instance, by value. Do
-// not construct an `absl::Flag<T>` directly and call `absl::GetFlag()`;
-// instead, refer to flag's constructed variable name (e.g. `FLAGS_name`).
-// Because this function returns by value and not by reference, it is
-// thread-safe, but note that the operation may be expensive; as a result, avoid
-// `absl::GetFlag()` within any tight loops.
-//
-// Example:
-//
-//   // FLAGS_count is a Flag of type `int`
-//   int my_count = absl::GetFlag(FLAGS_count);
-//
-//   // FLAGS_firstname is a Flag of type `std::string`
-//   std::string first_name = absl::GetFlag(FLAGS_firstname);
-template <typename T>
-ABSL_MUST_USE_RESULT T GetFlag(const absl::Flag<T>& flag) {
-  return flags_internal::FlagImplPeer::InvokeGet<T>(flag);
-}
-
-// SetFlag()
-//
-// Sets the value of an `absl::Flag` to the value `v`. Do not construct an
-// `absl::Flag<T>` directly and call `absl::SetFlag()`; instead, use the
-// flag's variable name (e.g. `FLAGS_name`). This function is
-// thread-safe, but is potentially expensive. Avoid setting flags in general,
-// but especially within performance-critical code.
-template <typename T>
-void SetFlag(absl::Flag<T>* flag, const T& v) {
-  flags_internal::FlagImplPeer::InvokeSet(*flag, v);
-}
-
-// Overload of `SetFlag()` to allow callers to pass in a value that is
-// convertible to `T`. E.g., use this overload to pass a "const char*" when `T`
-// is `std::string`.
-template <typename T, typename V>
-void SetFlag(absl::Flag<T>* flag, const V& v) {
-  T value(v);
-  flags_internal::FlagImplPeer::InvokeSet(*flag, value);
-}
-
-// GetFlagReflectionHandle()
-//
-// Returns the reflection handle corresponding to specified Abseil Flag
-// instance. Use this handle to access flag's reflection information, like name,
-// location, default value etc.
-//
-// Example:
-//
-//   std::string = absl::GetFlagReflectionHandle(FLAGS_count).DefaultValue();
-
-template <typename T>
-const CommandLineFlag& GetFlagReflectionHandle(const absl::Flag<T>& f) {
-  return flags_internal::FlagImplPeer::InvokeReflect(f);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-
-// ABSL_FLAG()
-//
-// This macro defines an `absl::Flag<T>` instance of a specified type `T`:
-//
-//   ABSL_FLAG(T, name, default_value, help);
-//
-// where:
-//
-//   * `T` is a supported flag type (see the list of types in `marshalling.h`),
-//   * `name` designates the name of the flag (as a global variable
-//     `FLAGS_name`),
-//   * `default_value` is an expression holding the default value for this flag
-//     (which must be implicitly convertible to `T`),
-//   * `help` is the help text, which can also be an expression.
-//
-// This macro expands to a flag named 'FLAGS_name' of type 'T':
-//
-//   absl::Flag<T> FLAGS_name = ...;
-//
-// Note that all such instances are created as global variables.
-//
-// For `ABSL_FLAG()` values that you wish to expose to other translation units,
-// it is recommended to define those flags within the `.cc` file associated with
-// the header where the flag is declared.
-//
-// Note: do not construct objects of type `absl::Flag<T>` directly. Only use the
-// `ABSL_FLAG()` macro for such construction.
-#define ABSL_FLAG(Type, name, default_value, help) \
-  ABSL_FLAG_IMPL(Type, name, default_value, help)
-
-// ABSL_FLAG().OnUpdate()
-//
-// Defines a flag of type `T` with a callback attached:
-//
-//   ABSL_FLAG(T, name, default_value, help).OnUpdate(callback);
-//
-// After any setting of the flag value, the callback will be called at least
-// once. A rapid sequence of changes may be merged together into the same
-// callback. No concurrent calls to the callback will be made for the same
-// flag. Callbacks are allowed to read the current value of the flag but must
-// not mutate that flag.
-//
-// The update mechanism guarantees "eventual consistency"; if the callback
-// derives an auxiliary data structure from the flag value, it is guaranteed
-// that eventually the flag value and the derived data structure will be
-// consistent.
-//
-// Note: ABSL_FLAG.OnUpdate() does not have a public definition. Hence, this
-// comment serves as its API documentation.
-
-
-// -----------------------------------------------------------------------------
-// Implementation details below this section
-// -----------------------------------------------------------------------------
-
-// ABSL_FLAG_IMPL macro definition conditional on ABSL_FLAGS_STRIP_NAMES
-#if !defined(_MSC_VER) || defined(__clang__)
-#define ABSL_FLAG_IMPL_FLAG_PTR(flag) flag
-#define ABSL_FLAG_IMPL_HELP_ARG(name)                      \
-  absl::flags_internal::HelpArg<AbslFlagHelpGenFor##name>( \
-      FLAGS_help_storage_##name)
-#define ABSL_FLAG_IMPL_DEFAULT_ARG(Type, name) \
-  absl::flags_internal::DefaultArg<Type, AbslFlagDefaultGenFor##name>(0)
-#else
-#define ABSL_FLAG_IMPL_FLAG_PTR(flag) flag.GetImpl()
-#define ABSL_FLAG_IMPL_HELP_ARG(name) &AbslFlagHelpGenFor##name::NonConst
-#define ABSL_FLAG_IMPL_DEFAULT_ARG(Type, name) &AbslFlagDefaultGenFor##name::Gen
-#endif
-
-#if ABSL_FLAGS_STRIP_NAMES
-#define ABSL_FLAG_IMPL_FLAGNAME(txt) ""
-#define ABSL_FLAG_IMPL_FILENAME() ""
-#define ABSL_FLAG_IMPL_REGISTRAR(T, flag) \
-  absl::flags_internal::FlagRegistrar<T, false>(ABSL_FLAG_IMPL_FLAG_PTR(flag))
-#else
-#define ABSL_FLAG_IMPL_FLAGNAME(txt) txt
-#define ABSL_FLAG_IMPL_FILENAME() __FILE__
-#define ABSL_FLAG_IMPL_REGISTRAR(T, flag) \
-  absl::flags_internal::FlagRegistrar<T, true>(ABSL_FLAG_IMPL_FLAG_PTR(flag))
-#endif
-
-// ABSL_FLAG_IMPL macro definition conditional on ABSL_FLAGS_STRIP_HELP
-
-#if ABSL_FLAGS_STRIP_HELP
-#define ABSL_FLAG_IMPL_FLAGHELP(txt) absl::flags_internal::kStrippedFlagHelp
-#else
-#define ABSL_FLAG_IMPL_FLAGHELP(txt) txt
-#endif
-
-// AbslFlagHelpGenFor##name is used to encapsulate both immediate (method Const)
-// and lazy (method NonConst) evaluation of help message expression. We choose
-// between the two via the call to HelpArg in absl::Flag instantiation below.
-// If help message expression is constexpr evaluable compiler will optimize
-// away this whole struct.
-// TODO(rogeeff): place these generated structs into local namespace and apply
-// ABSL_INTERNAL_UNIQUE_SHORT_NAME.
-// TODO(rogeeff): Apply __attribute__((nodebug)) to FLAGS_help_storage_##name
-#define ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, txt)                       \
-  struct AbslFlagHelpGenFor##name {                                          \
-    /* The expression is run in the caller as part of the   */               \
-    /* default value argument. That keeps temporaries alive */               \
-    /* long enough for NonConst to work correctly.          */               \
-    static constexpr absl::string_view Value(                                \
-        absl::string_view v = ABSL_FLAG_IMPL_FLAGHELP(txt)) {                \
-      return v;                                                              \
-    }                                                                        \
-    static std::string NonConst() { return std::string(Value()); }           \
-  };                                                                         \
-  constexpr auto FLAGS_help_storage_##name ABSL_INTERNAL_UNIQUE_SMALL_NAME() \
-      ABSL_ATTRIBUTE_SECTION_VARIABLE(flags_help_cold) =                     \
-          absl::flags_internal::HelpStringAsArray<AbslFlagHelpGenFor##name>( \
-              0);
-
-#define ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value)     \
-  struct AbslFlagDefaultGenFor##name {                                        \
-    Type value = absl::flags_internal::InitDefaultValue<Type>(default_value); \
-    static void Gen(void* p) {                                                \
-      new (p) Type(AbslFlagDefaultGenFor##name{}.value);                      \
-    }                                                                         \
-  };
-
-// ABSL_FLAG_IMPL
-//
-// Note: Name of registrar object is not arbitrary. It is used to "grab"
-// global name for FLAGS_no<flag_name> symbol, thus preventing the possibility
-// of defining two flags with names foo and nofoo.
-#define ABSL_FLAG_IMPL(Type, name, default_value, help)                       \
-  namespace absl /* block flags in namespaces */ {}                           \
-  ABSL_FLAG_IMPL_DECLARE_DEF_VAL_WRAPPER(name, Type, default_value)           \
-  ABSL_FLAG_IMPL_DECLARE_HELP_WRAPPER(name, help)                             \
-  ABSL_CONST_INIT absl::Flag<Type> FLAGS_##name{                              \
-      ABSL_FLAG_IMPL_FLAGNAME(#name), ABSL_FLAG_IMPL_FILENAME(),              \
-      ABSL_FLAG_IMPL_HELP_ARG(name), ABSL_FLAG_IMPL_DEFAULT_ARG(Type, name)}; \
-  extern absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name;             \
-  absl::flags_internal::FlagRegistrarEmpty FLAGS_no##name =                   \
-      ABSL_FLAG_IMPL_REGISTRAR(Type, FLAGS_##name)
-
-// ABSL_RETIRED_FLAG
-//
-// Designates the flag (which is usually pre-existing) as "retired." A retired
-// flag is a flag that is now unused by the program, but may still be passed on
-// the command line, usually by production scripts. A retired flag is ignored
-// and code can't access it at runtime.
-//
-// This macro registers a retired flag with given name and type, with a name
-// identical to the name of the original flag you are retiring. The retired
-// flag's type can change over time, so that you can retire code to support a
-// custom flag type.
-//
-// This macro has the same signature as `ABSL_FLAG`. To retire a flag, simply
-// replace an `ABSL_FLAG` definition with `ABSL_RETIRED_FLAG`, leaving the
-// arguments unchanged (unless of course you actually want to retire the flag
-// type at this time as well).
-//
-// `default_value` is only used as a double check on the type. `explanation` is
-// unused.
-// TODO(rogeeff): replace RETIRED_FLAGS with FLAGS once forward declarations of
-// retired flags are cleaned up.
-#define ABSL_RETIRED_FLAG(type, name, default_value, explanation)      \
-  static absl::flags_internal::RetiredFlag<type> RETIRED_FLAGS_##name; \
-  ABSL_ATTRIBUTE_UNUSED static const auto RETIRED_FLAGS_REG_##name =   \
-      (RETIRED_FLAGS_##name.Retire(#name),                             \
-       ::absl::flags_internal::FlagRegistrarEmpty{})
-
-#endif  // ABSL_FLAGS_FLAG_H_
diff --git a/third_party/abseil/absl/flags/flag_benchmark.cc b/third_party/abseil/absl/flags/flag_benchmark.cc
deleted file mode 100644
index 57584f8..0000000
--- a/third_party/abseil/absl/flags/flag_benchmark.cc
+++ /dev/null
@@ -1,168 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <stdint.h>
-
-#include <string>
-#include <vector>
-
-#include "absl/flags/flag.h"
-#include "absl/flags/marshalling.h"
-#include "absl/flags/parse.h"
-#include "absl/flags/reflection.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/time.h"
-#include "absl/types/optional.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-using String = std::string;
-using VectorOfStrings = std::vector<std::string>;
-using AbslDuration = absl::Duration;
-
-// We do not want to take over marshalling for the types absl::optional<int>,
-// absl::optional<std::string> which we do not own. Instead we introduce unique
-// "aliases" to these types, which we do.
-using AbslOptionalInt = absl::optional<int>;
-struct OptionalInt : AbslOptionalInt {
-  using AbslOptionalInt::AbslOptionalInt;
-};
-// Next two functions represent Abseil Flags marshalling for OptionalInt.
-bool AbslParseFlag(absl::string_view src, OptionalInt* flag,
-                   std::string* error) {
-  int val;
-  if (src.empty())
-    flag->reset();
-  else if (!absl::ParseFlag(src, &val, error))
-    return false;
-  *flag = val;
-  return true;
-}
-std::string AbslUnparseFlag(const OptionalInt& flag) {
-  return !flag ? "" : absl::UnparseFlag(*flag);
-}
-
-using AbslOptionalString = absl::optional<std::string>;
-struct OptionalString : AbslOptionalString {
-  using AbslOptionalString::AbslOptionalString;
-};
-// Next two functions represent Abseil Flags marshalling for OptionalString.
-bool AbslParseFlag(absl::string_view src, OptionalString* flag,
-                   std::string* error) {
-  std::string val;
-  if (src.empty())
-    flag->reset();
-  else if (!absl::ParseFlag(src, &val, error))
-    return false;
-  *flag = val;
-  return true;
-}
-std::string AbslUnparseFlag(const OptionalString& flag) {
-  return !flag ? "" : absl::UnparseFlag(*flag);
-}
-
-struct UDT {
-  UDT() = default;
-  UDT(const UDT&) {}
-  UDT& operator=(const UDT&) { return *this; }
-};
-// Next two functions represent Abseil Flags marshalling for UDT.
-bool AbslParseFlag(absl::string_view, UDT*, std::string*) { return true; }
-std::string AbslUnparseFlag(const UDT&) { return ""; }
-
-}  // namespace
-
-#define BENCHMARKED_TYPES(A) \
-  A(bool)                    \
-  A(int16_t)                 \
-  A(uint16_t)                \
-  A(int32_t)                 \
-  A(uint32_t)                \
-  A(int64_t)                 \
-  A(uint64_t)                \
-  A(double)                  \
-  A(float)                   \
-  A(String)                  \
-  A(VectorOfStrings)         \
-  A(OptionalInt)             \
-  A(OptionalString)          \
-  A(AbslDuration)            \
-  A(UDT)
-
-#define FLAG_DEF(T) ABSL_FLAG(T, T##_flag, {}, "");
-
-#if defined(__clang__) && defined(__linux__)
-// Force the flags used for benchmarks into a separate ELF section.
-// This ensures that, even when other parts of the code might change size,
-// the layout of the flags across cachelines is kept constant. This makes
-// benchmark results more reproducible across unrelated code changes.
-#pragma clang section data = ".benchmark_flags"
-#endif
-BENCHMARKED_TYPES(FLAG_DEF)
-#if defined(__clang__) && defined(__linux__)
-#pragma clang section data = ""
-#endif
-// Register thousands of flags to bloat up the size of the registry.
-// This mimics real life production binaries.
-#define DEFINE_FLAG_0(name) ABSL_FLAG(int, name, 0, "");
-#define DEFINE_FLAG_1(name) DEFINE_FLAG_0(name##0) DEFINE_FLAG_0(name##1)
-#define DEFINE_FLAG_2(name) DEFINE_FLAG_1(name##0) DEFINE_FLAG_1(name##1)
-#define DEFINE_FLAG_3(name) DEFINE_FLAG_2(name##0) DEFINE_FLAG_2(name##1)
-#define DEFINE_FLAG_4(name) DEFINE_FLAG_3(name##0) DEFINE_FLAG_3(name##1)
-#define DEFINE_FLAG_5(name) DEFINE_FLAG_4(name##0) DEFINE_FLAG_4(name##1)
-#define DEFINE_FLAG_6(name) DEFINE_FLAG_5(name##0) DEFINE_FLAG_5(name##1)
-#define DEFINE_FLAG_7(name) DEFINE_FLAG_6(name##0) DEFINE_FLAG_6(name##1)
-#define DEFINE_FLAG_8(name) DEFINE_FLAG_7(name##0) DEFINE_FLAG_7(name##1)
-#define DEFINE_FLAG_9(name) DEFINE_FLAG_8(name##0) DEFINE_FLAG_8(name##1)
-#define DEFINE_FLAG_10(name) DEFINE_FLAG_9(name##0) DEFINE_FLAG_9(name##1)
-#define DEFINE_FLAG_11(name) DEFINE_FLAG_10(name##0) DEFINE_FLAG_10(name##1)
-#define DEFINE_FLAG_12(name) DEFINE_FLAG_11(name##0) DEFINE_FLAG_11(name##1)
-DEFINE_FLAG_12(bloat_flag_);
-
-namespace {
-
-#define BM_GetFlag(T)                                            \
-  void BM_GetFlag_##T(benchmark::State& state) {                 \
-    for (auto _ : state) {                                       \
-      benchmark::DoNotOptimize(absl::GetFlag(FLAGS_##T##_flag)); \
-    }                                                            \
-  }                                                              \
-  BENCHMARK(BM_GetFlag_##T)->ThreadRange(1, 16);
-
-BENCHMARKED_TYPES(BM_GetFlag)
-
-void BM_ThreadedFindCommandLineFlag(benchmark::State& state) {
-  char dummy[] = "dummy";
-  char* argv[] = {dummy};
-  // We need to ensure that flags have been parsed. That is where the registry
-  // is finalized.
-  absl::ParseCommandLine(1, argv);
-
-  for (auto s : state) {
-    benchmark::DoNotOptimize(
-        absl::FindCommandLineFlag("bloat_flag_010101010101"));
-  }
-}
-BENCHMARK(BM_ThreadedFindCommandLineFlag)->ThreadRange(1, 16);
-
-}  // namespace
-
-#define InvokeGetFlag(T)                                               \
-  T AbslInvokeGetFlag##T() { return absl::GetFlag(FLAGS_##T##_flag); } \
-  int odr##T = (benchmark::DoNotOptimize(AbslInvokeGetFlag##T), 1);
-
-BENCHMARKED_TYPES(InvokeGetFlag)
-
-// To veiw disassembly use: gdb ${BINARY}  -batch -ex "disassemble /s $FUNC"
diff --git a/third_party/abseil/absl/flags/flag_benchmark.lds b/third_party/abseil/absl/flags/flag_benchmark.lds
deleted file mode 100644
index af115df..0000000
--- a/third_party/abseil/absl/flags/flag_benchmark.lds
+++ /dev/null
@@ -1,13 +0,0 @@
-/* This linker script forces the flags used by flags_benchmark
- * into a separate page-aligned section. This isn't necessary for
- * correctness but ensures that the benchmark results are more
- * reproducible across unrelated code changes.
- */
-SECTIONS {
-  .benchmark_flags : {
-    . = ALIGN(0x1000);
-    * (.benchmark_flags);
-  }
-}
-
-INSERT AFTER .data
diff --git a/third_party/abseil/absl/flags/flag_test.cc b/third_party/abseil/absl/flags/flag_test.cc
deleted file mode 100644
index 72507b9..0000000
--- a/third_party/abseil/absl/flags/flag_test.cc
+++ /dev/null
@@ -1,945 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/flag.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <atomic>
-#include <cmath>
-#include <new>
-#include <string>
-#include <thread>  // NOLINT
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/macros.h"
-#include "absl/flags/config.h"
-#include "absl/flags/declare.h"
-#include "absl/flags/internal/flag.h"
-#include "absl/flags/marshalling.h"
-#include "absl/flags/reflection.h"
-#include "absl/flags/usage_config.h"
-#include "absl/strings/match.h"
-#include "absl/strings/numbers.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/time.h"
-
-ABSL_DECLARE_FLAG(int64_t, mistyped_int_flag);
-ABSL_DECLARE_FLAG(std::vector<std::string>, mistyped_string_flag);
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-std::string TestHelpMsg() { return "dynamic help"; }
-#if defined(_MSC_VER) && !defined(__clang__)
-std::string TestLiteralHelpMsg() { return "literal help"; }
-#endif
-template <typename T>
-void TestMakeDflt(void* dst) {
-  new (dst) T{};
-}
-void TestCallback() {}
-
-struct UDT {
-  UDT() = default;
-  UDT(const UDT&) = default;
-};
-bool AbslParseFlag(absl::string_view, UDT*, std::string*) { return true; }
-std::string AbslUnparseFlag(const UDT&) { return ""; }
-
-class FlagTest : public testing::Test {
- protected:
-  static void SetUpTestSuite() {
-    // Install a function to normalize filenames before this test is run.
-    absl::FlagsUsageConfig default_config;
-    default_config.normalize_filename = &FlagTest::NormalizeFileName;
-    absl::SetFlagsUsageConfig(default_config);
-  }
-
- private:
-  static std::string NormalizeFileName(absl::string_view fname) {
-#ifdef _WIN32
-    std::string normalized(fname);
-    std::replace(normalized.begin(), normalized.end(), '\\', '/');
-    fname = normalized;
-#endif
-    return std::string(fname);
-  }
-  absl::FlagSaver flag_saver_;
-};
-
-struct S1 {
-  S1() = default;
-  S1(const S1&) = default;
-  int32_t f1;
-  int64_t f2;
-};
-
-struct S2 {
-  S2() = default;
-  S2(const S2&) = default;
-  int64_t f1;
-  double f2;
-};
-
-TEST_F(FlagTest, Traits) {
-  EXPECT_EQ(flags::StorageKind<int>(),
-            flags::FlagValueStorageKind::kOneWordAtomic);
-  EXPECT_EQ(flags::StorageKind<bool>(),
-            flags::FlagValueStorageKind::kOneWordAtomic);
-  EXPECT_EQ(flags::StorageKind<double>(),
-            flags::FlagValueStorageKind::kOneWordAtomic);
-  EXPECT_EQ(flags::StorageKind<int64_t>(),
-            flags::FlagValueStorageKind::kOneWordAtomic);
-
-  EXPECT_EQ(flags::StorageKind<S1>(),
-            flags::FlagValueStorageKind::kSequenceLocked);
-  EXPECT_EQ(flags::StorageKind<S2>(),
-            flags::FlagValueStorageKind::kSequenceLocked);
-// Make sure absl::Duration uses the sequence-locked code path. MSVC 2015
-// doesn't consider absl::Duration to be trivially-copyable so we just
-// restrict this to clang as it seems to be a well-behaved compiler.
-#ifdef __clang__
-  EXPECT_EQ(flags::StorageKind<absl::Duration>(),
-            flags::FlagValueStorageKind::kSequenceLocked);
-#endif
-
-  EXPECT_EQ(flags::StorageKind<std::string>(),
-            flags::FlagValueStorageKind::kAlignedBuffer);
-  EXPECT_EQ(flags::StorageKind<std::vector<std::string>>(),
-            flags::FlagValueStorageKind::kAlignedBuffer);
-}
-
-// --------------------------------------------------------------------
-
-constexpr flags::FlagHelpArg help_arg{flags::FlagHelpMsg("literal help"),
-                                      flags::FlagHelpKind::kLiteral};
-
-using String = std::string;
-
-#if !defined(_MSC_VER) || defined(__clang__)
-#define DEFINE_CONSTRUCTED_FLAG(T, dflt, dflt_kind)                        \
-  constexpr flags::FlagDefaultArg f1default##T{                            \
-      flags::FlagDefaultSrc{dflt}, flags::FlagDefaultKind::dflt_kind};     \
-  constexpr absl::Flag<T> f1##T{"f1", "file", help_arg, f1default##T};     \
-  ABSL_CONST_INIT absl::Flag<T> f2##T {                                    \
-    "f2", "file",                                                          \
-        {flags::FlagHelpMsg(&TestHelpMsg), flags::FlagHelpKind::kGenFunc}, \
-        flags::FlagDefaultArg {                                            \
-      flags::FlagDefaultSrc(&TestMakeDflt<T>),                             \
-          flags::FlagDefaultKind::kGenFunc                                 \
-    }                                                                      \
-  }
-#else
-#define DEFINE_CONSTRUCTED_FLAG(T, dflt, dflt_kind)                    \
-  constexpr flags::FlagDefaultArg f1default##T{                        \
-      flags::FlagDefaultSrc{dflt}, flags::FlagDefaultKind::dflt_kind}; \
-  constexpr absl::Flag<T> f1##T{"f1", "file", &TestLiteralHelpMsg,     \
-                                &TestMakeDflt<T>};                     \
-  ABSL_CONST_INIT absl::Flag<T> f2##T {                                \
-    "f2", "file", &TestHelpMsg, &TestMakeDflt<T>                       \
-  }
-#endif
-
-DEFINE_CONSTRUCTED_FLAG(bool, true, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(int16_t, 1, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(uint16_t, 2, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(int32_t, 3, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(uint32_t, 4, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(int64_t, 5, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(uint64_t, 6, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(float, 7.8, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(double, 9.10, kOneWord);
-DEFINE_CONSTRUCTED_FLAG(String, &TestMakeDflt<String>, kGenFunc);
-DEFINE_CONSTRUCTED_FLAG(UDT, &TestMakeDflt<UDT>, kGenFunc);
-
-template <typename T>
-bool TestConstructionFor(const absl::Flag<T>& f1, absl::Flag<T>& f2) {
-  EXPECT_EQ(absl::GetFlagReflectionHandle(f1).Name(), "f1");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(f1).Help(), "literal help");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(f1).Filename(), "file");
-
-  flags::FlagRegistrar<T, false>(ABSL_FLAG_IMPL_FLAG_PTR(f2))
-      .OnUpdate(TestCallback);
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(f2).Name(), "f2");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(f2).Help(), "dynamic help");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(f2).Filename(), "file");
-
-  return true;
-}
-
-#define TEST_CONSTRUCTED_FLAG(T) TestConstructionFor(f1##T, f2##T);
-
-TEST_F(FlagTest, TestConstruction) {
-  TEST_CONSTRUCTED_FLAG(bool);
-  TEST_CONSTRUCTED_FLAG(int16_t);
-  TEST_CONSTRUCTED_FLAG(uint16_t);
-  TEST_CONSTRUCTED_FLAG(int32_t);
-  TEST_CONSTRUCTED_FLAG(uint32_t);
-  TEST_CONSTRUCTED_FLAG(int64_t);
-  TEST_CONSTRUCTED_FLAG(uint64_t);
-  TEST_CONSTRUCTED_FLAG(float);
-  TEST_CONSTRUCTED_FLAG(double);
-  TEST_CONSTRUCTED_FLAG(String);
-  TEST_CONSTRUCTED_FLAG(UDT);
-}
-
-// --------------------------------------------------------------------
-
-}  // namespace
-
-ABSL_DECLARE_FLAG(bool, test_flag_01);
-ABSL_DECLARE_FLAG(int, test_flag_02);
-ABSL_DECLARE_FLAG(int16_t, test_flag_03);
-ABSL_DECLARE_FLAG(uint16_t, test_flag_04);
-ABSL_DECLARE_FLAG(int32_t, test_flag_05);
-ABSL_DECLARE_FLAG(uint32_t, test_flag_06);
-ABSL_DECLARE_FLAG(int64_t, test_flag_07);
-ABSL_DECLARE_FLAG(uint64_t, test_flag_08);
-ABSL_DECLARE_FLAG(double, test_flag_09);
-ABSL_DECLARE_FLAG(float, test_flag_10);
-ABSL_DECLARE_FLAG(std::string, test_flag_11);
-ABSL_DECLARE_FLAG(absl::Duration, test_flag_12);
-
-namespace {
-
-#if !ABSL_FLAGS_STRIP_NAMES
-
-TEST_F(FlagTest, TestFlagDeclaration) {
-  // test that we can access flag objects.
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_01).Name(),
-            "test_flag_01");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_02).Name(),
-            "test_flag_02");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_03).Name(),
-            "test_flag_03");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_04).Name(),
-            "test_flag_04");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_05).Name(),
-            "test_flag_05");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_06).Name(),
-            "test_flag_06");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_07).Name(),
-            "test_flag_07");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_08).Name(),
-            "test_flag_08");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_09).Name(),
-            "test_flag_09");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_10).Name(),
-            "test_flag_10");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_11).Name(),
-            "test_flag_11");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_12).Name(),
-            "test_flag_12");
-}
-#endif  // !ABSL_FLAGS_STRIP_NAMES
-
-// --------------------------------------------------------------------
-
-}  // namespace
-
-ABSL_FLAG(bool, test_flag_01, true, "test flag 01");
-ABSL_FLAG(int, test_flag_02, 1234, "test flag 02");
-ABSL_FLAG(int16_t, test_flag_03, -34, "test flag 03");
-ABSL_FLAG(uint16_t, test_flag_04, 189, "test flag 04");
-ABSL_FLAG(int32_t, test_flag_05, 10765, "test flag 05");
-ABSL_FLAG(uint32_t, test_flag_06, 40000, "test flag 06");
-ABSL_FLAG(int64_t, test_flag_07, -1234567, "test flag 07");
-ABSL_FLAG(uint64_t, test_flag_08, 9876543, "test flag 08");
-ABSL_FLAG(double, test_flag_09, -9.876e-50, "test flag 09");
-ABSL_FLAG(float, test_flag_10, 1.234e12f, "test flag 10");
-ABSL_FLAG(std::string, test_flag_11, "", "test flag 11");
-ABSL_FLAG(absl::Duration, test_flag_12, absl::Minutes(10), "test flag 12");
-
-namespace {
-
-#if !ABSL_FLAGS_STRIP_NAMES
-TEST_F(FlagTest, TestFlagDefinition) {
-  absl::string_view expected_file_name = "absl/flags/flag_test.cc";
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_01).Name(),
-            "test_flag_01");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_01).Help(),
-            "test flag 01");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_01).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_01).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_02).Name(),
-            "test_flag_02");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_02).Help(),
-            "test flag 02");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_02).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_02).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_03).Name(),
-            "test_flag_03");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_03).Help(),
-            "test flag 03");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_03).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_03).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_04).Name(),
-            "test_flag_04");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_04).Help(),
-            "test flag 04");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_04).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_04).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_05).Name(),
-            "test_flag_05");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_05).Help(),
-            "test flag 05");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_05).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_05).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_06).Name(),
-            "test_flag_06");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_06).Help(),
-            "test flag 06");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_06).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_06).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_07).Name(),
-            "test_flag_07");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_07).Help(),
-            "test flag 07");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_07).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_07).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_08).Name(),
-            "test_flag_08");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_08).Help(),
-            "test flag 08");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_08).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_08).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_09).Name(),
-            "test_flag_09");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_09).Help(),
-            "test flag 09");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_09).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_09).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_10).Name(),
-            "test_flag_10");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_10).Help(),
-            "test flag 10");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_10).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_10).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_11).Name(),
-            "test_flag_11");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_11).Help(),
-            "test flag 11");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_11).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_11).Filename();
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_12).Name(),
-            "test_flag_12");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_12).Help(),
-            "test flag 12");
-  EXPECT_TRUE(absl::EndsWith(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_12).Filename(),
-      expected_file_name))
-      << absl::GetFlagReflectionHandle(FLAGS_test_flag_12).Filename();
-}
-#endif  // !ABSL_FLAGS_STRIP_NAMES
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagTest, TestDefault) {
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_01).DefaultValue(),
-            "true");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_02).DefaultValue(),
-            "1234");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_03).DefaultValue(),
-            "-34");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_04).DefaultValue(),
-            "189");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_05).DefaultValue(),
-            "10765");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_06).DefaultValue(),
-            "40000");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_07).DefaultValue(),
-            "-1234567");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_08).DefaultValue(),
-            "9876543");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_09).DefaultValue(),
-            "-9.876e-50");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_10).DefaultValue(),
-            "1.234e+12");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_11).DefaultValue(),
-            "");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_12).DefaultValue(),
-            "10m");
-
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_01).CurrentValue(),
-            "true");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_02).CurrentValue(),
-            "1234");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_03).CurrentValue(),
-            "-34");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_04).CurrentValue(),
-            "189");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_05).CurrentValue(),
-            "10765");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_06).CurrentValue(),
-            "40000");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_07).CurrentValue(),
-            "-1234567");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_08).CurrentValue(),
-            "9876543");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_09).CurrentValue(),
-            "-9.876e-50");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_10).CurrentValue(),
-            "1.234e+12");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_11).CurrentValue(),
-            "");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_12).CurrentValue(),
-            "10m");
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_01), true);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_02), 1234);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_03), -34);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_04), 189);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_05), 10765);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_06), 40000);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_07), -1234567);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 9876543);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_09), -9.876e-50, 1e-55);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_10), 1.234e12f, 1e5f);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_11), "");
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_12), absl::Minutes(10));
-}
-
-// --------------------------------------------------------------------
-
-struct NonTriviallyCopyableAggregate {
-  NonTriviallyCopyableAggregate() = default;
-  NonTriviallyCopyableAggregate(const NonTriviallyCopyableAggregate& rhs)
-      : value(rhs.value) {}
-  NonTriviallyCopyableAggregate& operator=(
-      const NonTriviallyCopyableAggregate& rhs) {
-    value = rhs.value;
-    return *this;
-  }
-
-  int value;
-};
-bool AbslParseFlag(absl::string_view src, NonTriviallyCopyableAggregate* f,
-                   std::string* e) {
-  return absl::ParseFlag(src, &f->value, e);
-}
-std::string AbslUnparseFlag(const NonTriviallyCopyableAggregate& ntc) {
-  return absl::StrCat(ntc.value);
-}
-
-bool operator==(const NonTriviallyCopyableAggregate& ntc1,
-                const NonTriviallyCopyableAggregate& ntc2) {
-  return ntc1.value == ntc2.value;
-}
-
-}  // namespace
-
-ABSL_FLAG(bool, test_flag_eb_01, {}, "");
-ABSL_FLAG(int32_t, test_flag_eb_02, {}, "");
-ABSL_FLAG(int64_t, test_flag_eb_03, {}, "");
-ABSL_FLAG(double, test_flag_eb_04, {}, "");
-ABSL_FLAG(std::string, test_flag_eb_05, {}, "");
-ABSL_FLAG(NonTriviallyCopyableAggregate, test_flag_eb_06, {}, "");
-
-namespace {
-
-TEST_F(FlagTest, TestEmptyBracesDefault) {
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_eb_01).DefaultValue(),
-            "false");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_eb_02).DefaultValue(),
-            "0");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_eb_03).DefaultValue(),
-            "0");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_eb_04).DefaultValue(),
-            "0");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_eb_05).DefaultValue(),
-            "");
-  EXPECT_EQ(absl::GetFlagReflectionHandle(FLAGS_test_flag_eb_06).DefaultValue(),
-            "0");
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_eb_01), false);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_eb_02), 0);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_eb_03), 0);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_eb_04), 0.0);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_eb_05), "");
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_eb_06),
-            NonTriviallyCopyableAggregate{});
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagTest, TestGetSet) {
-  absl::SetFlag(&FLAGS_test_flag_01, false);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_01), false);
-
-  absl::SetFlag(&FLAGS_test_flag_02, 321);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_02), 321);
-
-  absl::SetFlag(&FLAGS_test_flag_03, 67);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_03), 67);
-
-  absl::SetFlag(&FLAGS_test_flag_04, 1);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_04), 1);
-
-  absl::SetFlag(&FLAGS_test_flag_05, -908);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_05), -908);
-
-  absl::SetFlag(&FLAGS_test_flag_06, 4001);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_06), 4001);
-
-  absl::SetFlag(&FLAGS_test_flag_07, -23456);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_07), -23456);
-
-  absl::SetFlag(&FLAGS_test_flag_08, 975310);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 975310);
-
-  absl::SetFlag(&FLAGS_test_flag_09, 1.00001);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_09), 1.00001, 1e-10);
-
-  absl::SetFlag(&FLAGS_test_flag_10, -3.54f);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_10), -3.54f, 1e-6f);
-
-  absl::SetFlag(&FLAGS_test_flag_11, "asdf");
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_11), "asdf");
-
-  absl::SetFlag(&FLAGS_test_flag_12, absl::Seconds(110));
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_12), absl::Seconds(110));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagTest, TestGetViaReflection) {
-  auto* handle = absl::FindCommandLineFlag("test_flag_01");
-  EXPECT_EQ(*handle->TryGet<bool>(), true);
-  handle = absl::FindCommandLineFlag("test_flag_02");
-  EXPECT_EQ(*handle->TryGet<int>(), 1234);
-  handle = absl::FindCommandLineFlag("test_flag_03");
-  EXPECT_EQ(*handle->TryGet<int16_t>(), -34);
-  handle = absl::FindCommandLineFlag("test_flag_04");
-  EXPECT_EQ(*handle->TryGet<uint16_t>(), 189);
-  handle = absl::FindCommandLineFlag("test_flag_05");
-  EXPECT_EQ(*handle->TryGet<int32_t>(), 10765);
-  handle = absl::FindCommandLineFlag("test_flag_06");
-  EXPECT_EQ(*handle->TryGet<uint32_t>(), 40000);
-  handle = absl::FindCommandLineFlag("test_flag_07");
-  EXPECT_EQ(*handle->TryGet<int64_t>(), -1234567);
-  handle = absl::FindCommandLineFlag("test_flag_08");
-  EXPECT_EQ(*handle->TryGet<uint64_t>(), 9876543);
-  handle = absl::FindCommandLineFlag("test_flag_09");
-  EXPECT_NEAR(*handle->TryGet<double>(), -9.876e-50, 1e-55);
-  handle = absl::FindCommandLineFlag("test_flag_10");
-  EXPECT_NEAR(*handle->TryGet<float>(), 1.234e12f, 1e5f);
-  handle = absl::FindCommandLineFlag("test_flag_11");
-  EXPECT_EQ(*handle->TryGet<std::string>(), "");
-  handle = absl::FindCommandLineFlag("test_flag_12");
-  EXPECT_EQ(*handle->TryGet<absl::Duration>(), absl::Minutes(10));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagTest, ConcurrentSetAndGet) {
-  static constexpr int kNumThreads = 8;
-  // Two arbitrary durations. One thread will concurrently flip the flag
-  // between these two values, while the other threads read it and verify
-  // that no other value is seen.
-  static const absl::Duration kValidDurations[] = {
-      absl::Seconds(int64_t{0x6cebf47a9b68c802}) + absl::Nanoseconds(229702057),
-      absl::Seconds(int64_t{0x23fec0307e4e9d3}) + absl::Nanoseconds(44555374)};
-  absl::SetFlag(&FLAGS_test_flag_12, kValidDurations[0]);
-
-  std::atomic<bool> stop{false};
-  std::vector<std::thread> threads;
-  auto* handle = absl::FindCommandLineFlag("test_flag_12");
-  for (int i = 0; i < kNumThreads; i++) {
-    threads.emplace_back([&]() {
-      while (!stop.load(std::memory_order_relaxed)) {
-        // Try loading the flag both directly and via a reflection
-        // handle.
-        absl::Duration v = absl::GetFlag(FLAGS_test_flag_12);
-        EXPECT_TRUE(v == kValidDurations[0] || v == kValidDurations[1]);
-        v = *handle->TryGet<absl::Duration>();
-        EXPECT_TRUE(v == kValidDurations[0] || v == kValidDurations[1]);
-      }
-    });
-  }
-  absl::Time end_time = absl::Now() + absl::Seconds(1);
-  int i = 0;
-  while (absl::Now() < end_time) {
-    absl::SetFlag(&FLAGS_test_flag_12,
-                  kValidDurations[i++ % ABSL_ARRAYSIZE(kValidDurations)]);
-  }
-  stop.store(true, std::memory_order_relaxed);
-  for (auto& t : threads) t.join();
-}
-
-// --------------------------------------------------------------------
-
-int GetDflt1() { return 1; }
-
-}  // namespace
-
-ABSL_FLAG(int, test_int_flag_with_non_const_default, GetDflt1(),
-          "test int flag non const default");
-ABSL_FLAG(std::string, test_string_flag_with_non_const_default,
-          absl::StrCat("AAA", "BBB"), "test string flag non const default");
-
-namespace {
-
-TEST_F(FlagTest, TestNonConstexprDefault) {
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_int_flag_with_non_const_default), 1);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_string_flag_with_non_const_default),
-            "AAABBB");
-}
-
-// --------------------------------------------------------------------
-
-}  // namespace
-
-ABSL_FLAG(bool, test_flag_with_non_const_help, true,
-          absl::StrCat("test ", "flag ", "non const help"));
-
-namespace {
-
-#if !ABSL_FLAGS_STRIP_HELP
-TEST_F(FlagTest, TestNonConstexprHelp) {
-  EXPECT_EQ(
-      absl::GetFlagReflectionHandle(FLAGS_test_flag_with_non_const_help).Help(),
-      "test flag non const help");
-}
-#endif  //! ABSL_FLAGS_STRIP_HELP
-
-// --------------------------------------------------------------------
-
-int cb_test_value = -1;
-void TestFlagCB();
-
-}  // namespace
-
-ABSL_FLAG(int, test_flag_with_cb, 100, "").OnUpdate(TestFlagCB);
-
-ABSL_FLAG(int, test_flag_with_lambda_cb, 200, "").OnUpdate([]() {
-  cb_test_value = absl::GetFlag(FLAGS_test_flag_with_lambda_cb) +
-                  absl::GetFlag(FLAGS_test_flag_with_cb);
-});
-
-namespace {
-
-void TestFlagCB() { cb_test_value = absl::GetFlag(FLAGS_test_flag_with_cb); }
-
-// Tests side-effects of callback invocation.
-TEST_F(FlagTest, CallbackInvocation) {
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_with_cb), 100);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_with_lambda_cb), 200);
-  EXPECT_EQ(cb_test_value, 300);
-
-  absl::SetFlag(&FLAGS_test_flag_with_cb, 1);
-  EXPECT_EQ(cb_test_value, 1);
-
-  absl::SetFlag(&FLAGS_test_flag_with_lambda_cb, 3);
-  EXPECT_EQ(cb_test_value, 4);
-}
-
-// --------------------------------------------------------------------
-
-struct CustomUDT {
-  CustomUDT() : a(1), b(1) {}
-  CustomUDT(int a_, int b_) : a(a_), b(b_) {}
-
-  friend bool operator==(const CustomUDT& f1, const CustomUDT& f2) {
-    return f1.a == f2.a && f1.b == f2.b;
-  }
-
-  int a;
-  int b;
-};
-bool AbslParseFlag(absl::string_view in, CustomUDT* f, std::string*) {
-  std::vector<absl::string_view> parts =
-      absl::StrSplit(in, ':', absl::SkipWhitespace());
-
-  if (parts.size() != 2) return false;
-
-  if (!absl::SimpleAtoi(parts[0], &f->a)) return false;
-
-  if (!absl::SimpleAtoi(parts[1], &f->b)) return false;
-
-  return true;
-}
-std::string AbslUnparseFlag(const CustomUDT& f) {
-  return absl::StrCat(f.a, ":", f.b);
-}
-
-}  // namespace
-
-ABSL_FLAG(CustomUDT, test_flag_custom_udt, CustomUDT(), "test flag custom UDT");
-
-namespace {
-
-TEST_F(FlagTest, TestCustomUDT) {
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_custom_udt), CustomUDT(1, 1));
-  absl::SetFlag(&FLAGS_test_flag_custom_udt, CustomUDT(2, 3));
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_custom_udt), CustomUDT(2, 3));
-}
-
-// MSVC produces link error on the type mismatch.
-// Linux does not have build errors and validations work as expected.
-#if !defined(_WIN32) && GTEST_HAS_DEATH_TEST
-
-using FlagDeathTest = FlagTest;
-
-TEST_F(FlagDeathTest, TestTypeMismatchValidations) {
-#if !defined(NDEBUG)
-  EXPECT_DEATH_IF_SUPPORTED(
-      static_cast<void>(absl::GetFlag(FLAGS_mistyped_int_flag)),
-      "Flag 'mistyped_int_flag' is defined as one type and declared "
-      "as another");
-  EXPECT_DEATH_IF_SUPPORTED(
-      static_cast<void>(absl::GetFlag(FLAGS_mistyped_string_flag)),
-      "Flag 'mistyped_string_flag' is defined as one type and "
-      "declared as another");
-#endif
-
-  EXPECT_DEATH_IF_SUPPORTED(
-      absl::SetFlag(&FLAGS_mistyped_int_flag, 1),
-      "Flag 'mistyped_int_flag' is defined as one type and declared "
-      "as another");
-  EXPECT_DEATH_IF_SUPPORTED(
-      absl::SetFlag(&FLAGS_mistyped_string_flag, std::vector<std::string>{}),
-      "Flag 'mistyped_string_flag' is defined as one type and declared as "
-      "another");
-}
-
-#endif
-
-// --------------------------------------------------------------------
-
-// A contrived type that offers implicit and explicit conversion from specific
-// source types.
-struct ConversionTestVal {
-  ConversionTestVal() = default;
-  explicit ConversionTestVal(int a_in) : a(a_in) {}
-
-  enum class ViaImplicitConv { kTen = 10, kEleven };
-  // NOLINTNEXTLINE
-  ConversionTestVal(ViaImplicitConv from) : a(static_cast<int>(from)) {}
-
-  int a;
-};
-
-bool AbslParseFlag(absl::string_view in, ConversionTestVal* val_out,
-                   std::string*) {
-  if (!absl::SimpleAtoi(in, &val_out->a)) {
-    return false;
-  }
-  return true;
-}
-std::string AbslUnparseFlag(const ConversionTestVal& val) {
-  return absl::StrCat(val.a);
-}
-
-}  // namespace
-
-// Flag default values can be specified with a value that converts to the flag
-// value type implicitly.
-ABSL_FLAG(ConversionTestVal, test_flag_implicit_conv,
-          ConversionTestVal::ViaImplicitConv::kTen,
-          "test flag init via implicit conversion");
-
-namespace {
-
-TEST_F(FlagTest, CanSetViaImplicitConversion) {
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_implicit_conv).a, 10);
-  absl::SetFlag(&FLAGS_test_flag_implicit_conv,
-                ConversionTestVal::ViaImplicitConv::kEleven);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_implicit_conv).a, 11);
-}
-
-// --------------------------------------------------------------------
-
-struct NonDfltConstructible {
- public:
-  // This constructor tests that we can initialize the flag with int value
-  NonDfltConstructible(int i) : value(i) {}  // NOLINT
-
-  // This constructor tests that we can't initialize the flag with char value
-  // but can with explicitly constructed NonDfltConstructible.
-  explicit NonDfltConstructible(char c) : value(100 + static_cast<int>(c)) {}
-
-  int value;
-};
-
-bool AbslParseFlag(absl::string_view in, NonDfltConstructible* ndc_out,
-                   std::string*) {
-  return absl::SimpleAtoi(in, &ndc_out->value);
-}
-std::string AbslUnparseFlag(const NonDfltConstructible& ndc) {
-  return absl::StrCat(ndc.value);
-}
-
-}  // namespace
-
-ABSL_FLAG(NonDfltConstructible, ndc_flag1, NonDfltConstructible('1'),
-          "Flag with non default constructible type");
-ABSL_FLAG(NonDfltConstructible, ndc_flag2, 0,
-          "Flag with non default constructible type");
-
-namespace {
-
-TEST_F(FlagTest, TestNonDefaultConstructibleType) {
-  EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag1).value, '1' + 100);
-  EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag2).value, 0);
-
-  absl::SetFlag(&FLAGS_ndc_flag1, NonDfltConstructible('A'));
-  absl::SetFlag(&FLAGS_ndc_flag2, 25);
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag1).value, 'A' + 100);
-  EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag2).value, 25);
-}
-
-}  // namespace
-
-// --------------------------------------------------------------------
-
-ABSL_RETIRED_FLAG(bool, old_bool_flag, true, "old descr");
-ABSL_RETIRED_FLAG(int, old_int_flag, (int)std::sqrt(10), "old descr");
-ABSL_RETIRED_FLAG(std::string, old_str_flag, "", absl::StrCat("old ", "descr"));
-
-bool initializaion_order_fiasco_test = [] {
-  // Iterate over all the flags during static initialization.
-  // This should not trigger ASan's initialization-order-fiasco.
-  auto* handle1 = absl::FindCommandLineFlag("flag_on_separate_file");
-  auto* handle2 = absl::FindCommandLineFlag("retired_flag_on_separate_file");
-  if (handle1 != nullptr && handle2 != nullptr) {
-    return handle1->Name() == handle2->Name();
-  }
-  return true;
-}();
-
-namespace {
-
-TEST_F(FlagTest, TestRetiredFlagRegistration) {
-  auto* handle = absl::FindCommandLineFlag("old_bool_flag");
-  EXPECT_TRUE(handle->IsOfType<bool>());
-  EXPECT_TRUE(handle->IsRetired());
-  handle = absl::FindCommandLineFlag("old_int_flag");
-  EXPECT_TRUE(handle->IsOfType<int>());
-  EXPECT_TRUE(handle->IsRetired());
-  handle = absl::FindCommandLineFlag("old_str_flag");
-  EXPECT_TRUE(handle->IsOfType<std::string>());
-  EXPECT_TRUE(handle->IsRetired());
-}
-
-}  // namespace
-
-// --------------------------------------------------------------------
-
-namespace {
-
-// User-defined type with small alignment, but size exceeding 16.
-struct SmallAlignUDT {
-  SmallAlignUDT() : c('A'), s(12) {}
-  char c;
-  int16_t s;
-  char bytes[14];
-};
-
-bool AbslParseFlag(absl::string_view, SmallAlignUDT*, std::string*) {
-  return true;
-}
-std::string AbslUnparseFlag(const SmallAlignUDT&) { return ""; }
-
-// User-defined type with small size, but not trivially copyable.
-struct NonTriviallyCopyableUDT {
-  NonTriviallyCopyableUDT() : c('A') {}
-  NonTriviallyCopyableUDT(const NonTriviallyCopyableUDT& rhs) : c(rhs.c) {}
-  NonTriviallyCopyableUDT& operator=(const NonTriviallyCopyableUDT& rhs) {
-    c = rhs.c;
-    return *this;
-  }
-
-  char c;
-};
-
-bool AbslParseFlag(absl::string_view, NonTriviallyCopyableUDT*, std::string*) {
-  return true;
-}
-std::string AbslUnparseFlag(const NonTriviallyCopyableUDT&) { return ""; }
-
-}  // namespace
-
-ABSL_FLAG(SmallAlignUDT, test_flag_sa_udt, {}, "help");
-ABSL_FLAG(NonTriviallyCopyableUDT, test_flag_ntc_udt, {}, "help");
-
-namespace {
-
-TEST_F(FlagTest, TestSmallAlignUDT) {
-  SmallAlignUDT value = absl::GetFlag(FLAGS_test_flag_sa_udt);
-  EXPECT_EQ(value.c, 'A');
-  EXPECT_EQ(value.s, 12);
-
-  value.c = 'B';
-  value.s = 45;
-  absl::SetFlag(&FLAGS_test_flag_sa_udt, value);
-  value = absl::GetFlag(FLAGS_test_flag_sa_udt);
-  EXPECT_EQ(value.c, 'B');
-  EXPECT_EQ(value.s, 45);
-}
-
-TEST_F(FlagTest, TestNonTriviallyCopyableUDT) {
-  NonTriviallyCopyableUDT value = absl::GetFlag(FLAGS_test_flag_ntc_udt);
-  EXPECT_EQ(value.c, 'A');
-
-  value.c = 'B';
-  absl::SetFlag(&FLAGS_test_flag_ntc_udt, value);
-  value = absl::GetFlag(FLAGS_test_flag_ntc_udt);
-  EXPECT_EQ(value.c, 'B');
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/flag_test_defs.cc b/third_party/abseil/absl/flags/flag_test_defs.cc
deleted file mode 100644
index 4e1693c..0000000
--- a/third_party/abseil/absl/flags/flag_test_defs.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file is used to test the mismatch of the flag type between definition
-// and declaration. These are definitions. flag_test.cc contains declarations.
-#include <string>
-#include "absl/flags/flag.h"
-
-ABSL_FLAG(int, mistyped_int_flag, 0, "");
-ABSL_FLAG(std::string, mistyped_string_flag, "", "");
-ABSL_FLAG(bool, flag_on_separate_file, false, "");
-ABSL_RETIRED_FLAG(bool, retired_flag_on_separate_file, false, "");
diff --git a/third_party/abseil/absl/flags/internal/commandlineflag.cc b/third_party/abseil/absl/flags/internal/commandlineflag.cc
deleted file mode 100644
index 4482955..0000000
--- a/third_party/abseil/absl/flags/internal/commandlineflag.cc
+++ /dev/null
@@ -1,26 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/commandlineflag.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-FlagStateInterface::~FlagStateInterface() {}
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/internal/commandlineflag.h b/third_party/abseil/absl/flags/internal/commandlineflag.h
deleted file mode 100644
index ebfe81b..0000000
--- a/third_party/abseil/absl/flags/internal/commandlineflag.h
+++ /dev/null
@@ -1,68 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_COMMANDLINEFLAG_H_
-#define ABSL_FLAGS_INTERNAL_COMMANDLINEFLAG_H_
-
-#include "absl/base/config.h"
-#include "absl/base/internal/fast_type_id.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// An alias for flag fast type id. This value identifies the flag value type
-// similarly to typeid(T), without relying on RTTI being available. In most
-// cases this id is enough to uniquely identify the flag's value type. In a few
-// cases we'll have to resort to using actual RTTI implementation if it is
-// available.
-using FlagFastTypeId = absl::base_internal::FastTypeIdType;
-
-// Options that control SetCommandLineOptionWithMode.
-enum FlagSettingMode {
-  // update the flag's value unconditionally (can call this multiple times).
-  SET_FLAGS_VALUE,
-  // update the flag's value, but *only if* it has not yet been updated
-  // with SET_FLAGS_VALUE, SET_FLAG_IF_DEFAULT, or "FLAGS_xxx = nondef".
-  SET_FLAG_IF_DEFAULT,
-  // set the flag's default value to this.  If the flag has not been updated
-  // yet (via SET_FLAGS_VALUE, SET_FLAG_IF_DEFAULT, or "FLAGS_xxx = nondef")
-  // change the flag's current value to the new default value as well.
-  SET_FLAGS_DEFAULT
-};
-
-// Options that control ParseFrom: Source of a value.
-enum ValueSource {
-  // Flag is being set by value specified on a command line.
-  kCommandLine,
-  // Flag is being set by value specified in the code.
-  kProgrammaticChange,
-};
-
-// Handle to FlagState objects. Specific flag state objects will restore state
-// of a flag produced this flag state from method CommandLineFlag::SaveState().
-class FlagStateInterface {
- public:
-  virtual ~FlagStateInterface();
-
-  // Restores the flag originated this object to the saved state.
-  virtual void Restore() const = 0;
-};
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_COMMANDLINEFLAG_H_
diff --git a/third_party/abseil/absl/flags/internal/flag.cc b/third_party/abseil/absl/flags/internal/flag.cc
deleted file mode 100644
index f83c1fe..0000000
--- a/third_party/abseil/absl/flags/internal/flag.cc
+++ /dev/null
@@ -1,581 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/flag.h"
-
-#include <assert.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-
-#include <array>
-#include <atomic>
-#include <memory>
-#include <new>
-#include <string>
-#include <typeinfo>
-
-#include "absl/base/call_once.h"
-#include "absl/base/casts.h"
-#include "absl/base/config.h"
-#include "absl/base/optimization.h"
-#include "absl/flags/config.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/flags/usage_config.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// The help message indicating that the commandline flag has been
-// 'stripped'. It will not show up when doing "-help" and its
-// variants. The flag is stripped if ABSL_FLAGS_STRIP_HELP is set to 1
-// before including absl/flags/flag.h
-const char kStrippedFlagHelp[] = "\001\002\003\004 (unknown) \004\003\002\001";
-
-namespace {
-
-// Currently we only validate flag values for user-defined flag types.
-bool ShouldValidateFlagValue(FlagFastTypeId flag_type_id) {
-#define DONT_VALIDATE(T, _) \
-  if (flag_type_id == base_internal::FastTypeId<T>()) return false;
-  ABSL_FLAGS_INTERNAL_SUPPORTED_TYPES(DONT_VALIDATE)
-#undef DONT_VALIDATE
-
-  return true;
-}
-
-// RAII helper used to temporarily unlock and relock `absl::Mutex`.
-// This is used when we need to ensure that locks are released while
-// invoking user supplied callbacks and then reacquired, since callbacks may
-// need to acquire these locks themselves.
-class MutexRelock {
- public:
-  explicit MutexRelock(absl::Mutex& mu) : mu_(mu) { mu_.Unlock(); }
-  ~MutexRelock() { mu_.Lock(); }
-
-  MutexRelock(const MutexRelock&) = delete;
-  MutexRelock& operator=(const MutexRelock&) = delete;
-
- private:
-  absl::Mutex& mu_;
-};
-
-}  // namespace
-
-///////////////////////////////////////////////////////////////////////////////
-// Persistent state of the flag data.
-
-class FlagImpl;
-
-class FlagState : public flags_internal::FlagStateInterface {
- public:
-  template <typename V>
-  FlagState(FlagImpl& flag_impl, const V& v, bool modified,
-            bool on_command_line, int64_t counter)
-      : flag_impl_(flag_impl),
-        value_(v),
-        modified_(modified),
-        on_command_line_(on_command_line),
-        counter_(counter) {}
-
-  ~FlagState() override {
-    if (flag_impl_.ValueStorageKind() != FlagValueStorageKind::kAlignedBuffer &&
-        flag_impl_.ValueStorageKind() != FlagValueStorageKind::kSequenceLocked)
-      return;
-    flags_internal::Delete(flag_impl_.op_, value_.heap_allocated);
-  }
-
- private:
-  friend class FlagImpl;
-
-  // Restores the flag to the saved state.
-  void Restore() const override {
-    if (!flag_impl_.RestoreState(*this)) return;
-
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrCat("Restore saved value of ", flag_impl_.Name(),
-                                   " to: ", flag_impl_.CurrentValue()));
-  }
-
-  // Flag and saved flag data.
-  FlagImpl& flag_impl_;
-  union SavedValue {
-    explicit SavedValue(void* v) : heap_allocated(v) {}
-    explicit SavedValue(int64_t v) : one_word(v) {}
-
-    void* heap_allocated;
-    int64_t one_word;
-  } value_;
-  bool modified_;
-  bool on_command_line_;
-  int64_t counter_;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag implementation, which does not depend on flag value type.
-
-DynValueDeleter::DynValueDeleter(FlagOpFn op_arg) : op(op_arg) {}
-
-void DynValueDeleter::operator()(void* ptr) const {
-  if (op == nullptr) return;
-
-  Delete(op, ptr);
-}
-
-void FlagImpl::Init() {
-  new (&data_guard_) absl::Mutex;
-
-  auto def_kind = static_cast<FlagDefaultKind>(def_kind_);
-
-  switch (ValueStorageKind()) {
-    case FlagValueStorageKind::kAlignedBuffer:
-      // For this storage kind the default_value_ always points to gen_func
-      // during initialization.
-      assert(def_kind == FlagDefaultKind::kGenFunc);
-      (*default_value_.gen_func)(AlignedBufferValue());
-      break;
-    case FlagValueStorageKind::kOneWordAtomic: {
-      alignas(int64_t) std::array<char, sizeof(int64_t)> buf{};
-      if (def_kind == FlagDefaultKind::kGenFunc) {
-        (*default_value_.gen_func)(buf.data());
-      } else {
-        assert(def_kind != FlagDefaultKind::kDynamicValue);
-        std::memcpy(buf.data(), &default_value_, Sizeof(op_));
-      }
-      OneWordValue().store(absl::bit_cast<int64_t>(buf),
-                           std::memory_order_release);
-      break;
-    }
-    case FlagValueStorageKind::kSequenceLocked: {
-      // For this storage kind the default_value_ always points to gen_func
-      // during initialization.
-      assert(def_kind == FlagDefaultKind::kGenFunc);
-      (*default_value_.gen_func)(AtomicBufferValue());
-      break;
-    }
-  }
-  seq_lock_.MarkInitialized();
-}
-
-absl::Mutex* FlagImpl::DataGuard() const {
-  absl::call_once(const_cast<FlagImpl*>(this)->init_control_, &FlagImpl::Init,
-                  const_cast<FlagImpl*>(this));
-
-  // data_guard_ is initialized inside Init.
-  return reinterpret_cast<absl::Mutex*>(&data_guard_);
-}
-
-void FlagImpl::AssertValidType(FlagFastTypeId rhs_type_id,
-                               const std::type_info* (*gen_rtti)()) const {
-  FlagFastTypeId lhs_type_id = flags_internal::FastTypeId(op_);
-
-  // `rhs_type_id` is the fast type id corresponding to the declaration
-  // visibile at the call site. `lhs_type_id` is the fast type id
-  // corresponding to the type specified in flag definition. They must match
-  //  for this operation to be well-defined.
-  if (ABSL_PREDICT_TRUE(lhs_type_id == rhs_type_id)) return;
-
-  const std::type_info* lhs_runtime_type_id =
-      flags_internal::RuntimeTypeId(op_);
-  const std::type_info* rhs_runtime_type_id = (*gen_rtti)();
-
-  if (lhs_runtime_type_id == rhs_runtime_type_id) return;
-
-#if defined(ABSL_FLAGS_INTERNAL_HAS_RTTI)
-  if (*lhs_runtime_type_id == *rhs_runtime_type_id) return;
-#endif
-
-  ABSL_INTERNAL_LOG(
-      FATAL, absl::StrCat("Flag '", Name(),
-                          "' is defined as one type and declared as another"));
-}
-
-std::unique_ptr<void, DynValueDeleter> FlagImpl::MakeInitValue() const {
-  void* res = nullptr;
-  switch (DefaultKind()) {
-    case FlagDefaultKind::kDynamicValue:
-      res = flags_internal::Clone(op_, default_value_.dynamic_value);
-      break;
-    case FlagDefaultKind::kGenFunc:
-      res = flags_internal::Alloc(op_);
-      (*default_value_.gen_func)(res);
-      break;
-    default:
-      res = flags_internal::Clone(op_, &default_value_);
-      break;
-  }
-  return {res, DynValueDeleter{op_}};
-}
-
-void FlagImpl::StoreValue(const void* src) {
-  switch (ValueStorageKind()) {
-    case FlagValueStorageKind::kAlignedBuffer:
-      Copy(op_, src, AlignedBufferValue());
-      seq_lock_.IncrementModificationCount();
-      break;
-    case FlagValueStorageKind::kOneWordAtomic: {
-      int64_t one_word_val = 0;
-      std::memcpy(&one_word_val, src, Sizeof(op_));
-      OneWordValue().store(one_word_val, std::memory_order_release);
-      seq_lock_.IncrementModificationCount();
-      break;
-    }
-    case FlagValueStorageKind::kSequenceLocked: {
-      seq_lock_.Write(AtomicBufferValue(), src, Sizeof(op_));
-      break;
-    }
-  }
-  modified_ = true;
-  InvokeCallback();
-}
-
-absl::string_view FlagImpl::Name() const { return name_; }
-
-std::string FlagImpl::Filename() const {
-  return flags_internal::GetUsageConfig().normalize_filename(filename_);
-}
-
-std::string FlagImpl::Help() const {
-  return HelpSourceKind() == FlagHelpKind::kLiteral ? help_.literal
-                                                    : help_.gen_func();
-}
-
-FlagFastTypeId FlagImpl::TypeId() const {
-  return flags_internal::FastTypeId(op_);
-}
-
-int64_t FlagImpl::ModificationCount() const {
-  return seq_lock_.ModificationCount();
-}
-
-bool FlagImpl::IsSpecifiedOnCommandLine() const {
-  absl::MutexLock l(DataGuard());
-  return on_command_line_;
-}
-
-std::string FlagImpl::DefaultValue() const {
-  absl::MutexLock l(DataGuard());
-
-  auto obj = MakeInitValue();
-  return flags_internal::Unparse(op_, obj.get());
-}
-
-std::string FlagImpl::CurrentValue() const {
-  auto* guard = DataGuard();  // Make sure flag initialized
-  switch (ValueStorageKind()) {
-    case FlagValueStorageKind::kAlignedBuffer: {
-      absl::MutexLock l(guard);
-      return flags_internal::Unparse(op_, AlignedBufferValue());
-    }
-    case FlagValueStorageKind::kOneWordAtomic: {
-      const auto one_word_val =
-          absl::bit_cast<std::array<char, sizeof(int64_t)>>(
-              OneWordValue().load(std::memory_order_acquire));
-      return flags_internal::Unparse(op_, one_word_val.data());
-    }
-    case FlagValueStorageKind::kSequenceLocked: {
-      std::unique_ptr<void, DynValueDeleter> cloned(flags_internal::Alloc(op_),
-                                                    DynValueDeleter{op_});
-      ReadSequenceLockedData(cloned.get());
-      return flags_internal::Unparse(op_, cloned.get());
-    }
-  }
-
-  return "";
-}
-
-void FlagImpl::SetCallback(const FlagCallbackFunc mutation_callback) {
-  absl::MutexLock l(DataGuard());
-
-  if (callback_ == nullptr) {
-    callback_ = new FlagCallback;
-  }
-  callback_->func = mutation_callback;
-
-  InvokeCallback();
-}
-
-void FlagImpl::InvokeCallback() const {
-  if (!callback_) return;
-
-  // Make a copy of the C-style function pointer that we are about to invoke
-  // before we release the lock guarding it.
-  FlagCallbackFunc cb = callback_->func;
-
-  // If the flag has a mutation callback this function invokes it. While the
-  // callback is being invoked the primary flag's mutex is unlocked and it is
-  // re-locked back after call to callback is completed. Callback invocation is
-  // guarded by flag's secondary mutex instead which prevents concurrent
-  // callback invocation. Note that it is possible for other thread to grab the
-  // primary lock and update flag's value at any time during the callback
-  // invocation. This is by design. Callback can get a value of the flag if
-  // necessary, but it might be different from the value initiated the callback
-  // and it also can be different by the time the callback invocation is
-  // completed. Requires that *primary_lock be held in exclusive mode; it may be
-  // released and reacquired by the implementation.
-  MutexRelock relock(*DataGuard());
-  absl::MutexLock lock(&callback_->guard);
-  cb();
-}
-
-std::unique_ptr<FlagStateInterface> FlagImpl::SaveState() {
-  absl::MutexLock l(DataGuard());
-
-  bool modified = modified_;
-  bool on_command_line = on_command_line_;
-  switch (ValueStorageKind()) {
-    case FlagValueStorageKind::kAlignedBuffer: {
-      return absl::make_unique<FlagState>(
-          *this, flags_internal::Clone(op_, AlignedBufferValue()), modified,
-          on_command_line, ModificationCount());
-    }
-    case FlagValueStorageKind::kOneWordAtomic: {
-      return absl::make_unique<FlagState>(
-          *this, OneWordValue().load(std::memory_order_acquire), modified,
-          on_command_line, ModificationCount());
-    }
-    case FlagValueStorageKind::kSequenceLocked: {
-      void* cloned = flags_internal::Alloc(op_);
-      // Read is guaranteed to be successful because we hold the lock.
-      bool success =
-          seq_lock_.TryRead(cloned, AtomicBufferValue(), Sizeof(op_));
-      assert(success);
-      static_cast<void>(success);
-      return absl::make_unique<FlagState>(*this, cloned, modified,
-                                          on_command_line, ModificationCount());
-    }
-  }
-  return nullptr;
-}
-
-bool FlagImpl::RestoreState(const FlagState& flag_state) {
-  absl::MutexLock l(DataGuard());
-  if (flag_state.counter_ == ModificationCount()) {
-    return false;
-  }
-
-  switch (ValueStorageKind()) {
-    case FlagValueStorageKind::kAlignedBuffer:
-    case FlagValueStorageKind::kSequenceLocked:
-      StoreValue(flag_state.value_.heap_allocated);
-      break;
-    case FlagValueStorageKind::kOneWordAtomic:
-      StoreValue(&flag_state.value_.one_word);
-      break;
-  }
-
-  modified_ = flag_state.modified_;
-  on_command_line_ = flag_state.on_command_line_;
-
-  return true;
-}
-
-template <typename StorageT>
-StorageT* FlagImpl::OffsetValue() const {
-  char* p = reinterpret_cast<char*>(const_cast<FlagImpl*>(this));
-  // The offset is deduced via Flag value type specific op_.
-  size_t offset = flags_internal::ValueOffset(op_);
-
-  return reinterpret_cast<StorageT*>(p + offset);
-}
-
-void* FlagImpl::AlignedBufferValue() const {
-  assert(ValueStorageKind() == FlagValueStorageKind::kAlignedBuffer);
-  return OffsetValue<void>();
-}
-
-std::atomic<uint64_t>* FlagImpl::AtomicBufferValue() const {
-  assert(ValueStorageKind() == FlagValueStorageKind::kSequenceLocked);
-  return OffsetValue<std::atomic<uint64_t>>();
-}
-
-std::atomic<int64_t>& FlagImpl::OneWordValue() const {
-  assert(ValueStorageKind() == FlagValueStorageKind::kOneWordAtomic);
-  return OffsetValue<FlagOneWordValue>()->value;
-}
-
-// Attempts to parse supplied `value` string using parsing routine in the `flag`
-// argument. If parsing successful, this function replaces the dst with newly
-// parsed value. In case if any error is encountered in either step, the error
-// message is stored in 'err'
-std::unique_ptr<void, DynValueDeleter> FlagImpl::TryParse(
-    absl::string_view value, std::string& err) const {
-  std::unique_ptr<void, DynValueDeleter> tentative_value = MakeInitValue();
-
-  std::string parse_err;
-  if (!flags_internal::Parse(op_, value, tentative_value.get(), &parse_err)) {
-    absl::string_view err_sep = parse_err.empty() ? "" : "; ";
-    err = absl::StrCat("Illegal value '", value, "' specified for flag '",
-                       Name(), "'", err_sep, parse_err);
-    return nullptr;
-  }
-
-  return tentative_value;
-}
-
-void FlagImpl::Read(void* dst) const {
-  auto* guard = DataGuard();  // Make sure flag initialized
-  switch (ValueStorageKind()) {
-    case FlagValueStorageKind::kAlignedBuffer: {
-      absl::MutexLock l(guard);
-      flags_internal::CopyConstruct(op_, AlignedBufferValue(), dst);
-      break;
-    }
-    case FlagValueStorageKind::kOneWordAtomic: {
-      const int64_t one_word_val =
-          OneWordValue().load(std::memory_order_acquire);
-      std::memcpy(dst, &one_word_val, Sizeof(op_));
-      break;
-    }
-    case FlagValueStorageKind::kSequenceLocked: {
-      ReadSequenceLockedData(dst);
-      break;
-    }
-  }
-}
-
-void FlagImpl::ReadSequenceLockedData(void* dst) const {
-  int size = Sizeof(op_);
-  // Attempt to read using the sequence lock.
-  if (ABSL_PREDICT_TRUE(seq_lock_.TryRead(dst, AtomicBufferValue(), size))) {
-    return;
-  }
-  // We failed due to contention. Acquire the lock to prevent contention
-  // and try again.
-  absl::ReaderMutexLock l(DataGuard());
-  bool success = seq_lock_.TryRead(dst, AtomicBufferValue(), size);
-  assert(success);
-  static_cast<void>(success);
-}
-
-void FlagImpl::Write(const void* src) {
-  absl::MutexLock l(DataGuard());
-
-  if (ShouldValidateFlagValue(flags_internal::FastTypeId(op_))) {
-    std::unique_ptr<void, DynValueDeleter> obj{flags_internal::Clone(op_, src),
-                                               DynValueDeleter{op_}};
-    std::string ignored_error;
-    std::string src_as_str = flags_internal::Unparse(op_, src);
-    if (!flags_internal::Parse(op_, src_as_str, obj.get(), &ignored_error)) {
-      ABSL_INTERNAL_LOG(ERROR, absl::StrCat("Attempt to set flag '", Name(),
-                                            "' to invalid value ", src_as_str));
-    }
-  }
-
-  StoreValue(src);
-}
-
-// Sets the value of the flag based on specified string `value`. If the flag
-// was successfully set to new value, it returns true. Otherwise, sets `err`
-// to indicate the error, leaves the flag unchanged, and returns false. There
-// are three ways to set the flag's value:
-//  * Update the current flag value
-//  * Update the flag's default value
-//  * Update the current flag value if it was never set before
-// The mode is selected based on 'set_mode' parameter.
-bool FlagImpl::ParseFrom(absl::string_view value, FlagSettingMode set_mode,
-                         ValueSource source, std::string& err) {
-  absl::MutexLock l(DataGuard());
-
-  switch (set_mode) {
-    case SET_FLAGS_VALUE: {
-      // set or modify the flag's value
-      auto tentative_value = TryParse(value, err);
-      if (!tentative_value) return false;
-
-      StoreValue(tentative_value.get());
-
-      if (source == kCommandLine) {
-        on_command_line_ = true;
-      }
-      break;
-    }
-    case SET_FLAG_IF_DEFAULT: {
-      // set the flag's value, but only if it hasn't been set by someone else
-      if (modified_) {
-        // TODO(rogeeff): review and fix this semantic. Currently we do not fail
-        // in this case if flag is modified. This is misleading since the flag's
-        // value is not updated even though we return true.
-        // *err = absl::StrCat(Name(), " is already set to ",
-        //                     CurrentValue(), "\n");
-        // return false;
-        return true;
-      }
-      auto tentative_value = TryParse(value, err);
-      if (!tentative_value) return false;
-
-      StoreValue(tentative_value.get());
-      break;
-    }
-    case SET_FLAGS_DEFAULT: {
-      auto tentative_value = TryParse(value, err);
-      if (!tentative_value) return false;
-
-      if (DefaultKind() == FlagDefaultKind::kDynamicValue) {
-        void* old_value = default_value_.dynamic_value;
-        default_value_.dynamic_value = tentative_value.release();
-        tentative_value.reset(old_value);
-      } else {
-        default_value_.dynamic_value = tentative_value.release();
-        def_kind_ = static_cast<uint8_t>(FlagDefaultKind::kDynamicValue);
-      }
-
-      if (!modified_) {
-        // Need to set both default value *and* current, in this case.
-        StoreValue(default_value_.dynamic_value);
-        modified_ = false;
-      }
-      break;
-    }
-  }
-
-  return true;
-}
-
-void FlagImpl::CheckDefaultValueParsingRoundtrip() const {
-  std::string v = DefaultValue();
-
-  absl::MutexLock lock(DataGuard());
-
-  auto dst = MakeInitValue();
-  std::string error;
-  if (!flags_internal::Parse(op_, v, dst.get(), &error)) {
-    ABSL_INTERNAL_LOG(
-        FATAL,
-        absl::StrCat("Flag ", Name(), " (from ", Filename(),
-                     "): string form of default value '", v,
-                     "' could not be parsed; error=", error));
-  }
-
-  // We do not compare dst to def since parsing/unparsing may make
-  // small changes, e.g., precision loss for floating point types.
-}
-
-bool FlagImpl::ValidateInputValue(absl::string_view value) const {
-  absl::MutexLock l(DataGuard());
-
-  auto obj = MakeInitValue();
-  std::string ignored_error;
-  return flags_internal::Parse(op_, value, obj.get(), &ignored_error);
-}
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/internal/flag.h b/third_party/abseil/absl/flags/internal/flag.h
deleted file mode 100644
index 8354814..0000000
--- a/third_party/abseil/absl/flags/internal/flag.h
+++ /dev/null
@@ -1,746 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_FLAG_H_
-#define ABSL_FLAGS_INTERNAL_FLAG_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <atomic>
-#include <cstring>
-#include <memory>
-#include <new>
-#include <string>
-#include <type_traits>
-#include <typeinfo>
-
-#include "absl/base/attributes.h"
-#include "absl/base/call_once.h"
-#include "absl/base/config.h"
-#include "absl/base/optimization.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/config.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/flags/internal/registry.h"
-#include "absl/flags/internal/sequence_lock.h"
-#include "absl/flags/marshalling.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-///////////////////////////////////////////////////////////////////////////////
-// Forward declaration of absl::Flag<T> public API.
-namespace flags_internal {
-template <typename T>
-class Flag;
-}  // namespace flags_internal
-
-#if defined(_MSC_VER) && !defined(__clang__)
-template <typename T>
-class Flag;
-#else
-template <typename T>
-using Flag = flags_internal::Flag<T>;
-#endif
-
-template <typename T>
-ABSL_MUST_USE_RESULT T GetFlag(const absl::Flag<T>& flag);
-
-template <typename T>
-void SetFlag(absl::Flag<T>* flag, const T& v);
-
-template <typename T, typename V>
-void SetFlag(absl::Flag<T>* flag, const V& v);
-
-template <typename U>
-const CommandLineFlag& GetFlagReflectionHandle(const absl::Flag<U>& f);
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag value type operations, eg., parsing, copying, etc. are provided
-// by function specific to that type with a signature matching FlagOpFn.
-
-namespace flags_internal {
-
-enum class FlagOp {
-  kAlloc,
-  kDelete,
-  kCopy,
-  kCopyConstruct,
-  kSizeof,
-  kFastTypeId,
-  kRuntimeTypeId,
-  kParse,
-  kUnparse,
-  kValueOffset,
-};
-using FlagOpFn = void* (*)(FlagOp, const void*, void*, void*);
-
-// Forward declaration for Flag value specific operations.
-template <typename T>
-void* FlagOps(FlagOp op, const void* v1, void* v2, void* v3);
-
-// Allocate aligned memory for a flag value.
-inline void* Alloc(FlagOpFn op) {
-  return op(FlagOp::kAlloc, nullptr, nullptr, nullptr);
-}
-// Deletes memory interpreting obj as flag value type pointer.
-inline void Delete(FlagOpFn op, void* obj) {
-  op(FlagOp::kDelete, nullptr, obj, nullptr);
-}
-// Copies src to dst interpreting as flag value type pointers.
-inline void Copy(FlagOpFn op, const void* src, void* dst) {
-  op(FlagOp::kCopy, src, dst, nullptr);
-}
-// Construct a copy of flag value in a location pointed by dst
-// based on src - pointer to the flag's value.
-inline void CopyConstruct(FlagOpFn op, const void* src, void* dst) {
-  op(FlagOp::kCopyConstruct, src, dst, nullptr);
-}
-// Makes a copy of flag value pointed by obj.
-inline void* Clone(FlagOpFn op, const void* obj) {
-  void* res = flags_internal::Alloc(op);
-  flags_internal::CopyConstruct(op, obj, res);
-  return res;
-}
-// Returns true if parsing of input text is successfull.
-inline bool Parse(FlagOpFn op, absl::string_view text, void* dst,
-                  std::string* error) {
-  return op(FlagOp::kParse, &text, dst, error) != nullptr;
-}
-// Returns string representing supplied value.
-inline std::string Unparse(FlagOpFn op, const void* val) {
-  std::string result;
-  op(FlagOp::kUnparse, val, &result, nullptr);
-  return result;
-}
-// Returns size of flag value type.
-inline size_t Sizeof(FlagOpFn op) {
-  // This sequence of casts reverses the sequence from
-  // `flags_internal::FlagOps()`
-  return static_cast<size_t>(reinterpret_cast<intptr_t>(
-      op(FlagOp::kSizeof, nullptr, nullptr, nullptr)));
-}
-// Returns fast type id coresponding to the value type.
-inline FlagFastTypeId FastTypeId(FlagOpFn op) {
-  return reinterpret_cast<FlagFastTypeId>(
-      op(FlagOp::kFastTypeId, nullptr, nullptr, nullptr));
-}
-// Returns fast type id coresponding to the value type.
-inline const std::type_info* RuntimeTypeId(FlagOpFn op) {
-  return reinterpret_cast<const std::type_info*>(
-      op(FlagOp::kRuntimeTypeId, nullptr, nullptr, nullptr));
-}
-// Returns offset of the field value_ from the field impl_ inside of
-// absl::Flag<T> data. Given FlagImpl pointer p you can get the
-// location of the corresponding value as:
-//      reinterpret_cast<char*>(p) + ValueOffset().
-inline ptrdiff_t ValueOffset(FlagOpFn op) {
-  // This sequence of casts reverses the sequence from
-  // `flags_internal::FlagOps()`
-  return static_cast<ptrdiff_t>(reinterpret_cast<intptr_t>(
-      op(FlagOp::kValueOffset, nullptr, nullptr, nullptr)));
-}
-
-// Returns an address of RTTI's typeid(T).
-template <typename T>
-inline const std::type_info* GenRuntimeTypeId() {
-#if defined(ABSL_FLAGS_INTERNAL_HAS_RTTI)
-  return &typeid(T);
-#else
-  return nullptr;
-#endif
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag help auxiliary structs.
-
-// This is help argument for absl::Flag encapsulating the string literal pointer
-// or pointer to function generating it as well as enum descriminating two
-// cases.
-using HelpGenFunc = std::string (*)();
-
-template <size_t N>
-struct FixedCharArray {
-  char value[N];
-
-  template <size_t... I>
-  static constexpr FixedCharArray<N> FromLiteralString(
-      absl::string_view str, absl::index_sequence<I...>) {
-    return (void)str, FixedCharArray<N>({{str[I]..., '\0'}});
-  }
-};
-
-template <typename Gen, size_t N = Gen::Value().size()>
-constexpr FixedCharArray<N + 1> HelpStringAsArray(int) {
-  return FixedCharArray<N + 1>::FromLiteralString(
-      Gen::Value(), absl::make_index_sequence<N>{});
-}
-
-template <typename Gen>
-constexpr std::false_type HelpStringAsArray(char) {
-  return std::false_type{};
-}
-
-union FlagHelpMsg {
-  constexpr explicit FlagHelpMsg(const char* help_msg) : literal(help_msg) {}
-  constexpr explicit FlagHelpMsg(HelpGenFunc help_gen) : gen_func(help_gen) {}
-
-  const char* literal;
-  HelpGenFunc gen_func;
-};
-
-enum class FlagHelpKind : uint8_t { kLiteral = 0, kGenFunc = 1 };
-
-struct FlagHelpArg {
-  FlagHelpMsg source;
-  FlagHelpKind kind;
-};
-
-extern const char kStrippedFlagHelp[];
-
-// These two HelpArg overloads allows us to select at compile time one of two
-// way to pass Help argument to absl::Flag. We'll be passing
-// AbslFlagHelpGenFor##name as Gen and integer 0 as a single argument to prefer
-// first overload if possible. If help message is evaluatable on constexpr
-// context We'll be able to make FixedCharArray out of it and we'll choose first
-// overload. In this case the help message expression is immediately evaluated
-// and is used to construct the absl::Flag. No additionl code is generated by
-// ABSL_FLAG Otherwise SFINAE kicks in and first overload is dropped from the
-// consideration, in which case the second overload will be used. The second
-// overload does not attempt to evaluate the help message expression
-// immediately and instead delays the evaluation by returing the function
-// pointer (&T::NonConst) genering the help message when necessary. This is
-// evaluatable in constexpr context, but the cost is an extra function being
-// generated in the ABSL_FLAG code.
-template <typename Gen, size_t N>
-constexpr FlagHelpArg HelpArg(const FixedCharArray<N>& value) {
-  return {FlagHelpMsg(value.value), FlagHelpKind::kLiteral};
-}
-
-template <typename Gen>
-constexpr FlagHelpArg HelpArg(std::false_type) {
-  return {FlagHelpMsg(&Gen::NonConst), FlagHelpKind::kGenFunc};
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag default value auxiliary structs.
-
-// Signature for the function generating the initial flag value (usually
-// based on default value supplied in flag's definition)
-using FlagDfltGenFunc = void (*)(void*);
-
-union FlagDefaultSrc {
-  constexpr explicit FlagDefaultSrc(FlagDfltGenFunc gen_func_arg)
-      : gen_func(gen_func_arg) {}
-
-#define ABSL_FLAGS_INTERNAL_DFLT_FOR_TYPE(T, name) \
-  T name##_value;                                  \
-  constexpr explicit FlagDefaultSrc(T value) : name##_value(value) {}  // NOLINT
-  ABSL_FLAGS_INTERNAL_BUILTIN_TYPES(ABSL_FLAGS_INTERNAL_DFLT_FOR_TYPE)
-#undef ABSL_FLAGS_INTERNAL_DFLT_FOR_TYPE
-
-  void* dynamic_value;
-  FlagDfltGenFunc gen_func;
-};
-
-enum class FlagDefaultKind : uint8_t {
-  kDynamicValue = 0,
-  kGenFunc = 1,
-  kOneWord = 2  // for default values UP to one word in size
-};
-
-struct FlagDefaultArg {
-  FlagDefaultSrc source;
-  FlagDefaultKind kind;
-};
-
-// This struct and corresponding overload to InitDefaultValue are used to
-// facilitate usage of {} as default value in ABSL_FLAG macro.
-// TODO(rogeeff): Fix handling types with explicit constructors.
-struct EmptyBraces {};
-
-template <typename T>
-constexpr T InitDefaultValue(T t) {
-  return t;
-}
-
-template <typename T>
-constexpr T InitDefaultValue(EmptyBraces) {
-  return T{};
-}
-
-template <typename ValueT, typename GenT,
-          typename std::enable_if<std::is_integral<ValueT>::value, int>::type =
-              (GenT{}, 0)>
-constexpr FlagDefaultArg DefaultArg(int) {
-  return {FlagDefaultSrc(GenT{}.value), FlagDefaultKind::kOneWord};
-}
-
-template <typename ValueT, typename GenT>
-constexpr FlagDefaultArg DefaultArg(char) {
-  return {FlagDefaultSrc(&GenT::Gen), FlagDefaultKind::kGenFunc};
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag current value auxiliary structs.
-
-constexpr int64_t UninitializedFlagValue() { return 0xababababababababll; }
-
-template <typename T>
-using FlagUseOneWordStorage = std::integral_constant<
-    bool, absl::type_traits_internal::is_trivially_copyable<T>::value &&
-              (sizeof(T) <= 8)>;
-
-template <class T>
-using FlagShouldUseSequenceLock = std::integral_constant<
-    bool, absl::type_traits_internal::is_trivially_copyable<T>::value &&
-              (sizeof(T) > 8)>;
-
-enum class FlagValueStorageKind : uint8_t {
-  kAlignedBuffer = 0,
-  kOneWordAtomic = 1,
-  kSequenceLocked = 2,
-};
-
-template <typename T>
-static constexpr FlagValueStorageKind StorageKind() {
-  return FlagUseOneWordStorage<T>::value ? FlagValueStorageKind::kOneWordAtomic
-         : FlagShouldUseSequenceLock<T>::value
-             ? FlagValueStorageKind::kSequenceLocked
-             : FlagValueStorageKind::kAlignedBuffer;
-}
-
-struct FlagOneWordValue {
-  constexpr FlagOneWordValue() : value(UninitializedFlagValue()) {}
-
-  std::atomic<int64_t> value;
-};
-
-template <typename T,
-          FlagValueStorageKind Kind = flags_internal::StorageKind<T>()>
-struct FlagValue;
-
-template <typename T>
-struct FlagValue<T, FlagValueStorageKind::kAlignedBuffer> {
-  bool Get(const SequenceLock&, T&) const { return false; }
-
-  alignas(T) char value[sizeof(T)];
-};
-
-template <typename T>
-struct FlagValue<T, FlagValueStorageKind::kOneWordAtomic> : FlagOneWordValue {
-  bool Get(const SequenceLock&, T& dst) const {
-    int64_t one_word_val = value.load(std::memory_order_acquire);
-    if (ABSL_PREDICT_FALSE(one_word_val == UninitializedFlagValue())) {
-      return false;
-    }
-    std::memcpy(&dst, static_cast<const void*>(&one_word_val), sizeof(T));
-    return true;
-  }
-};
-
-template <typename T>
-struct FlagValue<T, FlagValueStorageKind::kSequenceLocked> {
-  bool Get(const SequenceLock& lock, T& dst) const {
-    return lock.TryRead(&dst, value_words, sizeof(T));
-  }
-
-  static constexpr int kNumWords =
-      flags_internal::AlignUp(sizeof(T), sizeof(uint64_t)) / sizeof(uint64_t);
-
-  alignas(T) alignas(
-      std::atomic<uint64_t>) std::atomic<uint64_t> value_words[kNumWords];
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag callback auxiliary structs.
-
-// Signature for the mutation callback used by watched Flags
-// The callback is noexcept.
-// TODO(rogeeff): add noexcept after C++17 support is added.
-using FlagCallbackFunc = void (*)();
-
-struct FlagCallback {
-  FlagCallbackFunc func;
-  absl::Mutex guard;  // Guard for concurrent callback invocations.
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Flag implementation, which does not depend on flag value type.
-// The class encapsulates the Flag's data and access to it.
-
-struct DynValueDeleter {
-  explicit DynValueDeleter(FlagOpFn op_arg = nullptr);
-  void operator()(void* ptr) const;
-
-  FlagOpFn op;
-};
-
-class FlagState;
-
-class FlagImpl final : public CommandLineFlag {
- public:
-  constexpr FlagImpl(const char* name, const char* filename, FlagOpFn op,
-                     FlagHelpArg help, FlagValueStorageKind value_kind,
-                     FlagDefaultArg default_arg)
-      : name_(name),
-        filename_(filename),
-        op_(op),
-        help_(help.source),
-        help_source_kind_(static_cast<uint8_t>(help.kind)),
-        value_storage_kind_(static_cast<uint8_t>(value_kind)),
-        def_kind_(static_cast<uint8_t>(default_arg.kind)),
-        modified_(false),
-        on_command_line_(false),
-        callback_(nullptr),
-        default_value_(default_arg.source),
-        data_guard_{} {}
-
-  // Constant access methods
-  void Read(void* dst) const override ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  // Mutating access methods
-  void Write(const void* src) ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  // Interfaces to operate on callbacks.
-  void SetCallback(const FlagCallbackFunc mutation_callback)
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-  void InvokeCallback() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
-
-  // Used in read/write operations to validate source/target has correct type.
-  // For example if flag is declared as absl::Flag<int> FLAGS_foo, a call to
-  // absl::GetFlag(FLAGS_foo) validates that the type of FLAGS_foo is indeed
-  // int. To do that we pass the "assumed" type id (which is deduced from type
-  // int) as an argument `type_id`, which is in turn is validated against the
-  // type id stored in flag object by flag definition statement.
-  void AssertValidType(FlagFastTypeId type_id,
-                       const std::type_info* (*gen_rtti)()) const;
-
- private:
-  template <typename T>
-  friend class Flag;
-  friend class FlagState;
-
-  // Ensures that `data_guard_` is initialized and returns it.
-  absl::Mutex* DataGuard() const
-      ABSL_LOCK_RETURNED(reinterpret_cast<absl::Mutex*>(data_guard_));
-  // Returns heap allocated value of type T initialized with default value.
-  std::unique_ptr<void, DynValueDeleter> MakeInitValue() const
-      ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
-  // Flag initialization called via absl::call_once.
-  void Init();
-
-  // Offset value access methods. One per storage kind. These methods to not
-  // respect const correctness, so be very carefull using them.
-
-  // This is a shared helper routine which encapsulates most of the magic. Since
-  // it is only used inside the three routines below, which are defined in
-  // flag.cc, we can define it in that file as well.
-  template <typename StorageT>
-  StorageT* OffsetValue() const;
-  // This is an accessor for a value stored in an aligned buffer storage
-  // used for non-trivially-copyable data types.
-  // Returns a mutable pointer to the start of a buffer.
-  void* AlignedBufferValue() const;
-
-  // The same as above, but used for sequencelock-protected storage.
-  std::atomic<uint64_t>* AtomicBufferValue() const;
-
-  // This is an accessor for a value stored as one word atomic. Returns a
-  // mutable reference to an atomic value.
-  std::atomic<int64_t>& OneWordValue() const;
-
-  // Attempts to parse supplied `value` string. If parsing is successful,
-  // returns new value. Otherwise returns nullptr.
-  std::unique_ptr<void, DynValueDeleter> TryParse(absl::string_view value,
-                                                  std::string& err) const
-      ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
-  // Stores the flag value based on the pointer to the source.
-  void StoreValue(const void* src) ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
-
-  // Copy the flag data, protected by `seq_lock_` into `dst`.
-  //
-  // REQUIRES: ValueStorageKind() == kSequenceLocked.
-  void ReadSequenceLockedData(void* dst) const
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  FlagHelpKind HelpSourceKind() const {
-    return static_cast<FlagHelpKind>(help_source_kind_);
-  }
-  FlagValueStorageKind ValueStorageKind() const {
-    return static_cast<FlagValueStorageKind>(value_storage_kind_);
-  }
-  FlagDefaultKind DefaultKind() const
-      ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard()) {
-    return static_cast<FlagDefaultKind>(def_kind_);
-  }
-
-  // CommandLineFlag interface implementation
-  absl::string_view Name() const override;
-  std::string Filename() const override;
-  std::string Help() const override;
-  FlagFastTypeId TypeId() const override;
-  bool IsSpecifiedOnCommandLine() const override
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-  std::string DefaultValue() const override ABSL_LOCKS_EXCLUDED(*DataGuard());
-  std::string CurrentValue() const override ABSL_LOCKS_EXCLUDED(*DataGuard());
-  bool ValidateInputValue(absl::string_view value) const override
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-  void CheckDefaultValueParsingRoundtrip() const override
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  int64_t ModificationCount() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(*DataGuard());
-
-  // Interfaces to save and restore flags to/from persistent state.
-  // Returns current flag state or nullptr if flag does not support
-  // saving and restoring a state.
-  std::unique_ptr<FlagStateInterface> SaveState() override
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  // Restores the flag state to the supplied state object. If there is
-  // nothing to restore returns false. Otherwise returns true.
-  bool RestoreState(const FlagState& flag_state)
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  bool ParseFrom(absl::string_view value, FlagSettingMode set_mode,
-                 ValueSource source, std::string& error) override
-      ABSL_LOCKS_EXCLUDED(*DataGuard());
-
-  // Immutable flag's state.
-
-  // Flags name passed to ABSL_FLAG as second arg.
-  const char* const name_;
-  // The file name where ABSL_FLAG resides.
-  const char* const filename_;
-  // Type-specific operations "vtable".
-  const FlagOpFn op_;
-  // Help message literal or function to generate it.
-  const FlagHelpMsg help_;
-  // Indicates if help message was supplied as literal or generator func.
-  const uint8_t help_source_kind_ : 1;
-  // Kind of storage this flag is using for the flag's value.
-  const uint8_t value_storage_kind_ : 2;
-
-  uint8_t : 0;  // The bytes containing the const bitfields must not be
-                // shared with bytes containing the mutable bitfields.
-
-  // Mutable flag's state (guarded by `data_guard_`).
-
-  // def_kind_ is not guard by DataGuard() since it is accessed in Init without
-  // locks.
-  uint8_t def_kind_ : 2;
-  // Has this flag's value been modified?
-  bool modified_ : 1 ABSL_GUARDED_BY(*DataGuard());
-  // Has this flag been specified on command line.
-  bool on_command_line_ : 1 ABSL_GUARDED_BY(*DataGuard());
-
-  // Unique tag for absl::call_once call to initialize this flag.
-  absl::once_flag init_control_;
-
-  // Sequence lock / mutation counter.
-  flags_internal::SequenceLock seq_lock_;
-
-  // Optional flag's callback and absl::Mutex to guard the invocations.
-  FlagCallback* callback_ ABSL_GUARDED_BY(*DataGuard());
-  // Either a pointer to the function generating the default value based on the
-  // value specified in ABSL_FLAG or pointer to the dynamically set default
-  // value via SetCommandLineOptionWithMode. def_kind_ is used to distinguish
-  // these two cases.
-  FlagDefaultSrc default_value_;
-
-  // This is reserved space for an absl::Mutex to guard flag data. It will be
-  // initialized in FlagImpl::Init via placement new.
-  // We can't use "absl::Mutex data_guard_", since this class is not literal.
-  // We do not want to use "absl::Mutex* data_guard_", since this would require
-  // heap allocation during initialization, which is both slows program startup
-  // and can fail. Using reserved space + placement new allows us to avoid both
-  // problems.
-  alignas(absl::Mutex) mutable char data_guard_[sizeof(absl::Mutex)];
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// The Flag object parameterized by the flag's value type. This class implements
-// flag reflection handle interface.
-
-template <typename T>
-class Flag {
- public:
-  constexpr Flag(const char* name, const char* filename, FlagHelpArg help,
-                 const FlagDefaultArg default_arg)
-      : impl_(name, filename, &FlagOps<T>, help,
-              flags_internal::StorageKind<T>(), default_arg),
-        value_() {}
-
-  // CommandLineFlag interface
-  absl::string_view Name() const { return impl_.Name(); }
-  std::string Filename() const { return impl_.Filename(); }
-  std::string Help() const { return impl_.Help(); }
-  // Do not use. To be removed.
-  bool IsSpecifiedOnCommandLine() const {
-    return impl_.IsSpecifiedOnCommandLine();
-  }
-  std::string DefaultValue() const { return impl_.DefaultValue(); }
-  std::string CurrentValue() const { return impl_.CurrentValue(); }
-
- private:
-  template <typename, bool>
-  friend class FlagRegistrar;
-  friend class FlagImplPeer;
-
-  T Get() const {
-    // See implementation notes in CommandLineFlag::Get().
-    union U {
-      T value;
-      U() {}
-      ~U() { value.~T(); }
-    };
-    U u;
-
-#if !defined(NDEBUG)
-    impl_.AssertValidType(base_internal::FastTypeId<T>(), &GenRuntimeTypeId<T>);
-#endif
-
-    if (ABSL_PREDICT_FALSE(!value_.Get(impl_.seq_lock_, u.value))) {
-      impl_.Read(&u.value);
-    }
-    return std::move(u.value);
-  }
-  void Set(const T& v) {
-    impl_.AssertValidType(base_internal::FastTypeId<T>(), &GenRuntimeTypeId<T>);
-    impl_.Write(&v);
-  }
-
-  // Access to the reflection.
-  const CommandLineFlag& Reflect() const { return impl_; }
-
-  // Flag's data
-  // The implementation depends on value_ field to be placed exactly after the
-  // impl_ field, so that impl_ can figure out the offset to the value and
-  // access it.
-  FlagImpl impl_;
-  FlagValue<T> value_;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Trampoline for friend access
-
-class FlagImplPeer {
- public:
-  template <typename T, typename FlagType>
-  static T InvokeGet(const FlagType& flag) {
-    return flag.Get();
-  }
-  template <typename FlagType, typename T>
-  static void InvokeSet(FlagType& flag, const T& v) {
-    flag.Set(v);
-  }
-  template <typename FlagType>
-  static const CommandLineFlag& InvokeReflect(const FlagType& f) {
-    return f.Reflect();
-  }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Implementation of Flag value specific operations routine.
-template <typename T>
-void* FlagOps(FlagOp op, const void* v1, void* v2, void* v3) {
-  switch (op) {
-    case FlagOp::kAlloc: {
-      std::allocator<T> alloc;
-      return std::allocator_traits<std::allocator<T>>::allocate(alloc, 1);
-    }
-    case FlagOp::kDelete: {
-      T* p = static_cast<T*>(v2);
-      p->~T();
-      std::allocator<T> alloc;
-      std::allocator_traits<std::allocator<T>>::deallocate(alloc, p, 1);
-      return nullptr;
-    }
-    case FlagOp::kCopy:
-      *static_cast<T*>(v2) = *static_cast<const T*>(v1);
-      return nullptr;
-    case FlagOp::kCopyConstruct:
-      new (v2) T(*static_cast<const T*>(v1));
-      return nullptr;
-    case FlagOp::kSizeof:
-      return reinterpret_cast<void*>(static_cast<uintptr_t>(sizeof(T)));
-    case FlagOp::kFastTypeId:
-      return const_cast<void*>(base_internal::FastTypeId<T>());
-    case FlagOp::kRuntimeTypeId:
-      return const_cast<std::type_info*>(GenRuntimeTypeId<T>());
-    case FlagOp::kParse: {
-      // Initialize the temporary instance of type T based on current value in
-      // destination (which is going to be flag's default value).
-      T temp(*static_cast<T*>(v2));
-      if (!absl::ParseFlag<T>(*static_cast<const absl::string_view*>(v1), &temp,
-                              static_cast<std::string*>(v3))) {
-        return nullptr;
-      }
-      *static_cast<T*>(v2) = std::move(temp);
-      return v2;
-    }
-    case FlagOp::kUnparse:
-      *static_cast<std::string*>(v2) =
-          absl::UnparseFlag<T>(*static_cast<const T*>(v1));
-      return nullptr;
-    case FlagOp::kValueOffset: {
-      // Round sizeof(FlagImp) to a multiple of alignof(FlagValue<T>) to get the
-      // offset of the data.
-      ptrdiff_t round_to = alignof(FlagValue<T>);
-      ptrdiff_t offset =
-          (sizeof(FlagImpl) + round_to - 1) / round_to * round_to;
-      return reinterpret_cast<void*>(offset);
-    }
-  }
-  return nullptr;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// This class facilitates Flag object registration and tail expression-based
-// flag definition, for example:
-// ABSL_FLAG(int, foo, 42, "Foo help").OnUpdate(NotifyFooWatcher);
-struct FlagRegistrarEmpty {};
-template <typename T, bool do_register>
-class FlagRegistrar {
- public:
-  explicit FlagRegistrar(Flag<T>& flag) : flag_(flag) {
-    if (do_register) flags_internal::RegisterCommandLineFlag(flag_.impl_);
-  }
-
-  FlagRegistrar OnUpdate(FlagCallbackFunc cb) && {
-    flag_.impl_.SetCallback(cb);
-    return *this;
-  }
-
-  // Make the registrar "die" gracefully as an empty struct on a line where
-  // registration happens. Registrar objects are intended to live only as
-  // temporary.
-  operator FlagRegistrarEmpty() const { return {}; }  // NOLINT
-
- private:
-  Flag<T>& flag_;  // Flag being registered (not owned).
-};
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_FLAG_H_
diff --git a/third_party/abseil/absl/flags/internal/parse.h b/third_party/abseil/absl/flags/internal/parse.h
deleted file mode 100644
index de706c8..0000000
--- a/third_party/abseil/absl/flags/internal/parse.h
+++ /dev/null
@@ -1,59 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_PARSE_H_
-#define ABSL_FLAGS_INTERNAL_PARSE_H_
-
-#include <string>
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/flags/declare.h"
-#include "absl/strings/string_view.h"
-
-ABSL_DECLARE_FLAG(std::vector<std::string>, flagfile);
-ABSL_DECLARE_FLAG(std::vector<std::string>, fromenv);
-ABSL_DECLARE_FLAG(std::vector<std::string>, tryfromenv);
-ABSL_DECLARE_FLAG(std::vector<std::string>, undefok);
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-enum class ArgvListAction { kRemoveParsedArgs, kKeepParsedArgs };
-enum class UsageFlagsAction { kHandleUsage, kIgnoreUsage };
-enum class OnUndefinedFlag {
-  kIgnoreUndefined,
-  kReportUndefined,
-  kAbortIfUndefined
-};
-
-std::vector<char*> ParseCommandLineImpl(int argc, char* argv[],
-                                        ArgvListAction arg_list_act,
-                                        UsageFlagsAction usage_flag_act,
-                                        OnUndefinedFlag on_undef_flag);
-
-// --------------------------------------------------------------------
-// Inspect original command line
-
-// Returns true if flag with specified name was either present on the original
-// command line or specified in flag file present on the original command line.
-bool WasPresentOnCommandLine(absl::string_view flag_name);
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_PARSE_H_
diff --git a/third_party/abseil/absl/flags/internal/path_util.h b/third_party/abseil/absl/flags/internal/path_util.h
deleted file mode 100644
index a6594d3..0000000
--- a/third_party/abseil/absl/flags/internal/path_util.h
+++ /dev/null
@@ -1,62 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
-#define ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
-
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// A portable interface that returns the basename of the filename passed as an
-// argument. It is similar to basename(3)
-// <https://linux.die.net/man/3/basename>.
-// For example:
-//     flags_internal::Basename("a/b/prog/file.cc")
-// returns "file.cc"
-//     flags_internal::Basename("file.cc")
-// returns "file.cc"
-inline absl::string_view Basename(absl::string_view filename) {
-  auto last_slash_pos = filename.find_last_of("/\\");
-
-  return last_slash_pos == absl::string_view::npos
-             ? filename
-             : filename.substr(last_slash_pos + 1);
-}
-
-// A portable interface that returns the directory name of the filename
-// passed as an argument, including the trailing slash.
-// Returns the empty string if a slash is not found in the input file name.
-// For example:
-//      flags_internal::Package("a/b/prog/file.cc")
-// returns "a/b/prog/"
-//      flags_internal::Package("file.cc")
-// returns ""
-inline absl::string_view Package(absl::string_view filename) {
-  auto last_slash_pos = filename.find_last_of("/\\");
-
-  return last_slash_pos == absl::string_view::npos
-             ? absl::string_view()
-             : filename.substr(0, last_slash_pos + 1);
-}
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
diff --git a/third_party/abseil/absl/flags/internal/path_util_test.cc b/third_party/abseil/absl/flags/internal/path_util_test.cc
deleted file mode 100644
index 2091373..0000000
--- a/third_party/abseil/absl/flags/internal/path_util_test.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/path_util.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-TEST(FlagsPathUtilTest, TestBasename) {
-  EXPECT_EQ(flags::Basename(""), "");
-  EXPECT_EQ(flags::Basename("a.cc"), "a.cc");
-  EXPECT_EQ(flags::Basename("dir/a.cc"), "a.cc");
-  EXPECT_EQ(flags::Basename("dir1/dir2/a.cc"), "a.cc");
-  EXPECT_EQ(flags::Basename("../dir1/dir2/a.cc"), "a.cc");
-  EXPECT_EQ(flags::Basename("/dir1/dir2/a.cc"), "a.cc");
-  EXPECT_EQ(flags::Basename("/dir1/dir2/../dir3/a.cc"), "a.cc");
-}
-
-// --------------------------------------------------------------------
-
-TEST(FlagsPathUtilTest, TestPackage) {
-  EXPECT_EQ(flags::Package(""), "");
-  EXPECT_EQ(flags::Package("a.cc"), "");
-  EXPECT_EQ(flags::Package("dir/a.cc"), "dir/");
-  EXPECT_EQ(flags::Package("dir1/dir2/a.cc"), "dir1/dir2/");
-  EXPECT_EQ(flags::Package("../dir1/dir2/a.cc"), "../dir1/dir2/");
-  EXPECT_EQ(flags::Package("/dir1/dir2/a.cc"), "/dir1/dir2/");
-  EXPECT_EQ(flags::Package("/dir1/dir2/../dir3/a.cc"), "/dir1/dir2/../dir3/");
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/internal/private_handle_accessor.cc b/third_party/abseil/absl/flags/internal/private_handle_accessor.cc
deleted file mode 100644
index a7eb58b..0000000
--- a/third_party/abseil/absl/flags/internal/private_handle_accessor.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/private_handle_accessor.h"
-
-#include <memory>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-FlagFastTypeId PrivateHandleAccessor::TypeId(const CommandLineFlag& flag) {
-  return flag.TypeId();
-}
-
-std::unique_ptr<FlagStateInterface> PrivateHandleAccessor::SaveState(
-    CommandLineFlag& flag) {
-  return flag.SaveState();
-}
-
-bool PrivateHandleAccessor::IsSpecifiedOnCommandLine(
-    const CommandLineFlag& flag) {
-  return flag.IsSpecifiedOnCommandLine();
-}
-
-bool PrivateHandleAccessor::ValidateInputValue(const CommandLineFlag& flag,
-                                               absl::string_view value) {
-  return flag.ValidateInputValue(value);
-}
-
-void PrivateHandleAccessor::CheckDefaultValueParsingRoundtrip(
-    const CommandLineFlag& flag) {
-  flag.CheckDefaultValueParsingRoundtrip();
-}
-
-bool PrivateHandleAccessor::ParseFrom(CommandLineFlag& flag,
-                                      absl::string_view value,
-                                      flags_internal::FlagSettingMode set_mode,
-                                      flags_internal::ValueSource source,
-                                      std::string& error) {
-  return flag.ParseFrom(value, set_mode, source, error);
-}
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
diff --git a/third_party/abseil/absl/flags/internal/private_handle_accessor.h b/third_party/abseil/absl/flags/internal/private_handle_accessor.h
deleted file mode 100644
index c64435c..0000000
--- a/third_party/abseil/absl/flags/internal/private_handle_accessor.h
+++ /dev/null
@@ -1,61 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_
-#define ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_
-
-#include <memory>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// This class serves as a trampoline to access private methods of
-// CommandLineFlag. This class is intended for use exclusively internally inside
-// of the Abseil Flags implementation.
-class PrivateHandleAccessor {
- public:
-  // Access to CommandLineFlag::TypeId.
-  static FlagFastTypeId TypeId(const CommandLineFlag& flag);
-
-  // Access to CommandLineFlag::SaveState.
-  static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag& flag);
-
-  // Access to CommandLineFlag::IsSpecifiedOnCommandLine.
-  static bool IsSpecifiedOnCommandLine(const CommandLineFlag& flag);
-
-  // Access to CommandLineFlag::ValidateInputValue.
-  static bool ValidateInputValue(const CommandLineFlag& flag,
-                                 absl::string_view value);
-
-  // Access to CommandLineFlag::CheckDefaultValueParsingRoundtrip.
-  static void CheckDefaultValueParsingRoundtrip(const CommandLineFlag& flag);
-
-  static bool ParseFrom(CommandLineFlag& flag, absl::string_view value,
-                        flags_internal::FlagSettingMode set_mode,
-                        flags_internal::ValueSource source, std::string& error);
-};
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_
diff --git a/third_party/abseil/absl/flags/internal/program_name.cc b/third_party/abseil/absl/flags/internal/program_name.cc
deleted file mode 100644
index 51d698d..0000000
--- a/third_party/abseil/absl/flags/internal/program_name.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/program_name.h"
-
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/const_init.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/flags/internal/path_util.h"
-#include "absl/strings/string_view.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-ABSL_CONST_INIT static absl::Mutex program_name_guard(absl::kConstInit);
-ABSL_CONST_INIT static std::string* program_name
-    ABSL_GUARDED_BY(program_name_guard) = nullptr;
-
-std::string ProgramInvocationName() {
-  absl::MutexLock l(&program_name_guard);
-
-  return program_name ? *program_name : "UNKNOWN";
-}
-
-std::string ShortProgramInvocationName() {
-  absl::MutexLock l(&program_name_guard);
-
-  return program_name ? std::string(flags_internal::Basename(*program_name))
-                      : "UNKNOWN";
-}
-
-void SetProgramInvocationName(absl::string_view prog_name_str) {
-  absl::MutexLock l(&program_name_guard);
-
-  if (!program_name)
-    program_name = new std::string(prog_name_str);
-  else
-    program_name->assign(prog_name_str.data(), prog_name_str.size());
-}
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/internal/program_name.h b/third_party/abseil/absl/flags/internal/program_name.h
deleted file mode 100644
index b99b94f..0000000
--- a/third_party/abseil/absl/flags/internal/program_name.h
+++ /dev/null
@@ -1,50 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_PROGRAM_NAME_H_
-#define ABSL_FLAGS_INTERNAL_PROGRAM_NAME_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-// --------------------------------------------------------------------
-// Program name
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// Returns program invocation name or "UNKNOWN" if `SetProgramInvocationName()`
-// is never called. At the moment this is always set to argv[0] as part of
-// library initialization.
-std::string ProgramInvocationName();
-
-// Returns base name for program invocation name. For example, if
-//   ProgramInvocationName() == "a/b/mybinary"
-// then
-//   ShortProgramInvocationName() == "mybinary"
-std::string ShortProgramInvocationName();
-
-// Sets program invocation name to a new value. Should only be called once
-// during program initialization, before any threads are spawned.
-void SetProgramInvocationName(absl::string_view prog_name_str);
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_PROGRAM_NAME_H_
diff --git a/third_party/abseil/absl/flags/internal/program_name_test.cc b/third_party/abseil/absl/flags/internal/program_name_test.cc
deleted file mode 100644
index aff9f63..0000000
--- a/third_party/abseil/absl/flags/internal/program_name_test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/program_name.h"
-
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/strings/match.h"
-#include "absl/strings/string_view.h"
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-TEST(FlagsPathUtilTest, TestProgamNameInterfaces) {
-  flags::SetProgramInvocationName("absl/flags/program_name_test");
-  std::string program_name = flags::ProgramInvocationName();
-  for (char& c : program_name)
-    if (c == '\\') c = '/';
-
-#if !defined(__wasm__) && !defined(__asmjs__)
-  const std::string expect_name = "absl/flags/program_name_test";
-  const std::string expect_basename = "program_name_test";
-#else
-  // For targets that generate javascript or webassembly the invocation name
-  // has the special value below.
-  const std::string expect_name = "this.program";
-  const std::string expect_basename = "this.program";
-#endif
-
-  EXPECT_TRUE(absl::EndsWith(program_name, expect_name)) << program_name;
-  EXPECT_EQ(flags::ShortProgramInvocationName(), expect_basename);
-
-  flags::SetProgramInvocationName("a/my_test");
-
-  EXPECT_EQ(flags::ProgramInvocationName(), "a/my_test");
-  EXPECT_EQ(flags::ShortProgramInvocationName(), "my_test");
-
-  absl::string_view not_null_terminated("absl/aaa/bbb");
-  not_null_terminated = not_null_terminated.substr(1, 10);
-
-  flags::SetProgramInvocationName(not_null_terminated);
-
-  EXPECT_EQ(flags::ProgramInvocationName(), "bsl/aaa/bb");
-  EXPECT_EQ(flags::ShortProgramInvocationName(), "bb");
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/internal/registry.h b/third_party/abseil/absl/flags/internal/registry.h
deleted file mode 100644
index a8d9eb9..0000000
--- a/third_party/abseil/absl/flags/internal/registry.h
+++ /dev/null
@@ -1,97 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_REGISTRY_H_
-#define ABSL_FLAGS_INTERNAL_REGISTRY_H_
-
-#include <functional>
-
-#include "absl/base/config.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/strings/string_view.h"
-
-// --------------------------------------------------------------------
-// Global flags registry API.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// Executes specified visitor for each non-retired flag in the registry. While
-// callback are executed, the registry is locked and can't be changed.
-void ForEachFlag(std::function<void(CommandLineFlag&)> visitor);
-
-//-----------------------------------------------------------------------------
-
-bool RegisterCommandLineFlag(CommandLineFlag&);
-
-void FinalizeRegistry();
-
-//-----------------------------------------------------------------------------
-// Retired registrations:
-//
-// Retired flag registrations are treated specially. A 'retired' flag is
-// provided only for compatibility with automated invocations that still
-// name it.  A 'retired' flag:
-//   - is not bound to a C++ FLAGS_ reference.
-//   - has a type and a value, but that value is intentionally inaccessible.
-//   - does not appear in --help messages.
-//   - is fully supported by _all_ flag parsing routines.
-//   - consumes args normally, and complains about type mismatches in its
-//     argument.
-//   - emits a complaint but does not die (e.g. LOG(ERROR)) if it is
-//     accessed by name through the flags API for parsing or otherwise.
-//
-// The registrations for a flag happen in an unspecified order as the
-// initializers for the namespace-scope objects of a program are run.
-// Any number of weak registrations for a flag can weakly define the flag.
-// One non-weak registration will upgrade the flag from weak to non-weak.
-// Further weak registrations of a non-weak flag are ignored.
-//
-// This mechanism is designed to support moving dead flags into a
-// 'graveyard' library.  An example migration:
-//
-//   0: Remove references to this FLAGS_flagname in the C++ codebase.
-//   1: Register as 'retired' in old_lib.
-//   2: Make old_lib depend on graveyard.
-//   3: Add a redundant 'retired' registration to graveyard.
-//   4: Remove the old_lib 'retired' registration.
-//   5: Eventually delete the graveyard registration entirely.
-//
-
-// Retire flag with name "name" and type indicated by ops.
-void Retire(const char* name, FlagFastTypeId type_id, char* buf);
-
-constexpr size_t kRetiredFlagObjSize = 3 * sizeof(void*);
-constexpr size_t kRetiredFlagObjAlignment = alignof(void*);
-
-// Registered a retired flag with name 'flag_name' and type 'T'.
-template <typename T>
-class RetiredFlag {
- public:
-  void Retire(const char* flag_name) {
-    flags_internal::Retire(flag_name, base_internal::FastTypeId<T>(), buf_);
-  }
-
- private:
-  alignas(kRetiredFlagObjAlignment) char buf_[kRetiredFlagObjSize];
-};
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_REGISTRY_H_
diff --git a/third_party/abseil/absl/flags/internal/sequence_lock.h b/third_party/abseil/absl/flags/internal/sequence_lock.h
deleted file mode 100644
index 807b2a7..0000000
--- a/third_party/abseil/absl/flags/internal/sequence_lock.h
+++ /dev/null
@@ -1,187 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_SEQUENCE_LOCK_H_
-#define ABSL_FLAGS_INTERNAL_SEQUENCE_LOCK_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <atomic>
-#include <cassert>
-#include <cstring>
-
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// Align 'x' up to the nearest 'align' bytes.
-inline constexpr size_t AlignUp(size_t x, size_t align) {
-  return align * ((x + align - 1) / align);
-}
-
-// A SequenceLock implements lock-free reads. A sequence counter is incremented
-// before and after each write, and readers access the counter before and after
-// accessing the protected data. If the counter is verified to not change during
-// the access, and the sequence counter value was even, then the reader knows
-// that the read was race-free and valid. Otherwise, the reader must fall back
-// to a Mutex-based code path.
-//
-// This particular SequenceLock starts in an "uninitialized" state in which
-// TryRead() returns false. It must be enabled by calling MarkInitialized().
-// This serves as a marker that the associated flag value has not yet been
-// initialized and a slow path needs to be taken.
-//
-// The memory reads and writes protected by this lock must use the provided
-// `TryRead()` and `Write()` functions. These functions behave similarly to
-// `memcpy()`, with one oddity: the protected data must be an array of
-// `std::atomic<int64>`. This is to comply with the C++ standard, which
-// considers data races on non-atomic objects to be undefined behavior. See "Can
-// Seqlocks Get Along With Programming Language Memory Models?"[1] by Hans J.
-// Boehm for more details.
-//
-// [1] https://www.hpl.hp.com/techreports/2012/HPL-2012-68.pdf
-class SequenceLock {
- public:
-  constexpr SequenceLock() : lock_(kUninitialized) {}
-
-  // Mark that this lock is ready for use.
-  void MarkInitialized() {
-    assert(lock_.load(std::memory_order_relaxed) == kUninitialized);
-    lock_.store(0, std::memory_order_release);
-  }
-
-  // Copy "size" bytes of data from "src" to "dst", protected as a read-side
-  // critical section of the sequence lock.
-  //
-  // Unlike traditional sequence lock implementations which loop until getting a
-  // clean read, this implementation returns false in the case of concurrent
-  // calls to `Write`. In such a case, the caller should fall back to a
-  // locking-based slow path.
-  //
-  // Returns false if the sequence lock was not yet marked as initialized.
-  //
-  // NOTE: If this returns false, "dst" may be overwritten with undefined
-  // (potentially uninitialized) data.
-  bool TryRead(void* dst, const std::atomic<uint64_t>* src, size_t size) const {
-    // Acquire barrier ensures that no loads done by f() are reordered
-    // above the first load of the sequence counter.
-    int64_t seq_before = lock_.load(std::memory_order_acquire);
-    if (ABSL_PREDICT_FALSE(seq_before & 1) == 1) return false;
-    RelaxedCopyFromAtomic(dst, src, size);
-    // Another acquire fence ensures that the load of 'lock_' below is
-    // strictly ordered after the RelaxedCopyToAtomic call above.
-    std::atomic_thread_fence(std::memory_order_acquire);
-    int64_t seq_after = lock_.load(std::memory_order_relaxed);
-    return ABSL_PREDICT_TRUE(seq_before == seq_after);
-  }
-
-  // Copy "size" bytes from "src" to "dst" as a write-side critical section
-  // of the sequence lock. Any concurrent readers will be forced to retry
-  // until they get a read that does not conflict with this write.
-  //
-  // This call must be externally synchronized against other calls to Write,
-  // but may proceed concurrently with reads.
-  void Write(std::atomic<uint64_t>* dst, const void* src, size_t size) {
-    // We can use relaxed instructions to increment the counter since we
-    // are extenally synchronized. The std::atomic_thread_fence below
-    // ensures that the counter updates don't get interleaved with the
-    // copy to the data.
-    int64_t orig_seq = lock_.load(std::memory_order_relaxed);
-    assert((orig_seq & 1) == 0);  // Must be initially unlocked.
-    lock_.store(orig_seq + 1, std::memory_order_relaxed);
-
-    // We put a release fence between update to lock_ and writes to shared data.
-    // Thus all stores to shared data are effectively release operations and
-    // update to lock_ above cannot be re-ordered past any of them. Note that
-    // this barrier is not for the fetch_add above.  A release barrier for the
-    // fetch_add would be before it, not after.
-    std::atomic_thread_fence(std::memory_order_release);
-    RelaxedCopyToAtomic(dst, src, size);
-    // "Release" semantics ensure that none of the writes done by
-    // RelaxedCopyToAtomic() can be reordered after the following modification.
-    lock_.store(orig_seq + 2, std::memory_order_release);
-  }
-
-  // Return the number of times that Write() has been called.
-  //
-  // REQUIRES: This must be externally synchronized against concurrent calls to
-  // `Write()` or `IncrementModificationCount()`.
-  // REQUIRES: `MarkInitialized()` must have been previously called.
-  int64_t ModificationCount() const {
-    int64_t val = lock_.load(std::memory_order_relaxed);
-    assert(val != kUninitialized && (val & 1) == 0);
-    return val / 2;
-  }
-
-  // REQUIRES: This must be externally synchronized against concurrent calls to
-  // `Write()` or `ModificationCount()`.
-  // REQUIRES: `MarkInitialized()` must have been previously called.
-  void IncrementModificationCount() {
-    int64_t val = lock_.load(std::memory_order_relaxed);
-    assert(val != kUninitialized);
-    lock_.store(val + 2, std::memory_order_relaxed);
-  }
-
- private:
-  // Perform the equivalent of "memcpy(dst, src, size)", but using relaxed
-  // atomics.
-  static void RelaxedCopyFromAtomic(void* dst, const std::atomic<uint64_t>* src,
-                                    size_t size) {
-    char* dst_byte = static_cast<char*>(dst);
-    while (size >= sizeof(uint64_t)) {
-      uint64_t word = src->load(std::memory_order_relaxed);
-      std::memcpy(dst_byte, &word, sizeof(word));
-      dst_byte += sizeof(word);
-      src++;
-      size -= sizeof(word);
-    }
-    if (size > 0) {
-      uint64_t word = src->load(std::memory_order_relaxed);
-      std::memcpy(dst_byte, &word, size);
-    }
-  }
-
-  // Perform the equivalent of "memcpy(dst, src, size)", but using relaxed
-  // atomics.
-  static void RelaxedCopyToAtomic(std::atomic<uint64_t>* dst, const void* src,
-                                  size_t size) {
-    const char* src_byte = static_cast<const char*>(src);
-    while (size >= sizeof(uint64_t)) {
-      uint64_t word;
-      std::memcpy(&word, src_byte, sizeof(word));
-      dst->store(word, std::memory_order_relaxed);
-      src_byte += sizeof(word);
-      dst++;
-      size -= sizeof(word);
-    }
-    if (size > 0) {
-      uint64_t word = 0;
-      std::memcpy(&word, src_byte, size);
-      dst->store(word, std::memory_order_relaxed);
-    }
-  }
-
-  static constexpr int64_t kUninitialized = -1;
-  std::atomic<int64_t> lock_;
-};
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_SEQUENCE_LOCK_H_
diff --git a/third_party/abseil/absl/flags/internal/sequence_lock_test.cc b/third_party/abseil/absl/flags/internal/sequence_lock_test.cc
deleted file mode 100644
index 9aff1ed..0000000
--- a/third_party/abseil/absl/flags/internal/sequence_lock_test.cc
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include "absl/flags/internal/sequence_lock.h"
-
-#include <atomic>
-#include <thread>  // NOLINT(build/c++11)
-#include <tuple>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/sysinfo.h"
-#include "absl/container/fixed_array.h"
-#include "absl/time/clock.h"
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-class ConcurrentSequenceLockTest
-    : public testing::TestWithParam<std::tuple<int, int>> {
- public:
-  ConcurrentSequenceLockTest()
-      : buf_bytes_(std::get<0>(GetParam())),
-        num_threads_(std::get<1>(GetParam())) {}
-
- protected:
-  const int buf_bytes_;
-  const int num_threads_;
-};
-
-TEST_P(ConcurrentSequenceLockTest, ReadAndWrite) {
-  const int buf_words =
-      flags::AlignUp(buf_bytes_, sizeof(uint64_t)) / sizeof(uint64_t);
-
-  // The buffer that will be protected by the SequenceLock.
-  absl::FixedArray<std::atomic<uint64_t>> protected_buf(buf_words);
-  for (auto& v : protected_buf) v = -1;
-
-  flags::SequenceLock seq_lock;
-  std::atomic<bool> stop{false};
-  std::atomic<int64_t> bad_reads{0};
-  std::atomic<int64_t> good_reads{0};
-  std::atomic<int64_t> unsuccessful_reads{0};
-
-  // Start a bunch of threads which read 'protected_buf' under the sequence
-  // lock. The main thread will concurrently update 'protected_buf'. The updates
-  // always consist of an array of identical integers. The reader ensures that
-  // any data it reads matches that pattern (i.e. the reads are not "torn").
-  std::vector<std::thread> threads;
-  for (int i = 0; i < num_threads_; i++) {
-    threads.emplace_back([&]() {
-      absl::FixedArray<char> local_buf(buf_bytes_);
-      while (!stop.load(std::memory_order_relaxed)) {
-        if (seq_lock.TryRead(local_buf.data(), protected_buf.data(),
-                             buf_bytes_)) {
-          bool good = true;
-          for (const auto& v : local_buf) {
-            if (v != local_buf[0]) good = false;
-          }
-          if (good) {
-            good_reads.fetch_add(1, std::memory_order_relaxed);
-          } else {
-            bad_reads.fetch_add(1, std::memory_order_relaxed);
-          }
-        } else {
-          unsuccessful_reads.fetch_add(1, std::memory_order_relaxed);
-        }
-      }
-    });
-  }
-  while (unsuccessful_reads.load(std::memory_order_relaxed) < num_threads_) {
-    absl::SleepFor(absl::Milliseconds(1));
-  }
-  seq_lock.MarkInitialized();
-
-  // Run a maximum of 5 seconds. On Windows, the scheduler behavior seems
-  // somewhat unfair and without an explicit timeout for this loop, the tests
-  // can run a long time.
-  absl::Time deadline = absl::Now() + absl::Seconds(5);
-  for (int i = 0; i < 100 && absl::Now() < deadline; i++) {
-    absl::FixedArray<char> writer_buf(buf_bytes_);
-    for (auto& v : writer_buf) v = i;
-    seq_lock.Write(protected_buf.data(), writer_buf.data(), buf_bytes_);
-    absl::SleepFor(absl::Microseconds(10));
-  }
-  stop.store(true, std::memory_order_relaxed);
-  for (auto& t : threads) t.join();
-  ASSERT_GE(good_reads, 0);
-  ASSERT_EQ(bad_reads, 0);
-}
-
-// Simple helper for generating a range of thread counts.
-// Generates [low, low*scale, low*scale^2, ...high)
-// (even if high is between low*scale^k and low*scale^(k+1)).
-std::vector<int> MultiplicativeRange(int low, int high, int scale) {
-  std::vector<int> result;
-  for (int current = low; current < high; current *= scale) {
-    result.push_back(current);
-  }
-  result.push_back(high);
-  return result;
-}
-
-INSTANTIATE_TEST_SUITE_P(TestManyByteSizes, ConcurrentSequenceLockTest,
-                         testing::Combine(
-                             // Buffer size (bytes).
-                             testing::Range(1, 128),
-                             // Number of reader threads.
-                             testing::ValuesIn(MultiplicativeRange(
-                                 1, absl::base_internal::NumCPUs(), 2))));
-
-// Simple single-threaded test, parameterized by the size of the buffer to be
-// protected.
-class SequenceLockTest : public testing::TestWithParam<int> {};
-
-TEST_P(SequenceLockTest, SingleThreaded) {
-  const int size = GetParam();
-  absl::FixedArray<std::atomic<uint64_t>> protected_buf(
-      flags::AlignUp(size, sizeof(uint64_t)) / sizeof(uint64_t));
-
-  flags::SequenceLock seq_lock;
-  seq_lock.MarkInitialized();
-
-  std::vector<char> src_buf(size, 'x');
-  seq_lock.Write(protected_buf.data(), src_buf.data(), size);
-
-  std::vector<char> dst_buf(size, '0');
-  ASSERT_TRUE(seq_lock.TryRead(dst_buf.data(), protected_buf.data(), size));
-  ASSERT_EQ(src_buf, dst_buf);
-}
-INSTANTIATE_TEST_SUITE_P(TestManyByteSizes, SequenceLockTest,
-                         // Buffer size (bytes).
-                         testing::Range(1, 128));
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/internal/usage.cc b/third_party/abseil/absl/flags/internal/usage.cc
deleted file mode 100644
index a588c7f..0000000
--- a/third_party/abseil/absl/flags/internal/usage.cc
+++ /dev/null
@@ -1,518 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/usage.h"
-
-#include <stdint.h>
-
-#include <functional>
-#include <map>
-#include <ostream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/flag.h"
-#include "absl/flags/internal/flag.h"
-#include "absl/flags/internal/path_util.h"
-#include "absl/flags/internal/private_handle_accessor.h"
-#include "absl/flags/internal/program_name.h"
-#include "absl/flags/internal/registry.h"
-#include "absl/flags/usage_config.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "absl/strings/string_view.h"
-
-// Dummy global variables to prevent anyone else defining these.
-bool FLAGS_help = false;
-bool FLAGS_helpfull = false;
-bool FLAGS_helpshort = false;
-bool FLAGS_helppackage = false;
-bool FLAGS_version = false;
-bool FLAGS_only_check_args = false;
-bool FLAGS_helpon = false;
-bool FLAGS_helpmatch = false;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-namespace {
-
-using PerFlagFilter = std::function<bool(const absl::CommandLineFlag&)>;
-
-// Maximum length size in a human readable format.
-constexpr size_t kHrfMaxLineLength = 80;
-
-// This class is used to emit an XML element with `tag` and `text`.
-// It adds opening and closing tags and escapes special characters in the text.
-// For example:
-// std::cout << XMLElement("title", "Milk & Cookies");
-// prints "<title>Milk &amp; Cookies</title>"
-class XMLElement {
- public:
-  XMLElement(absl::string_view tag, absl::string_view txt)
-      : tag_(tag), txt_(txt) {}
-
-  friend std::ostream& operator<<(std::ostream& out,
-                                  const XMLElement& xml_elem) {
-    out << "<" << xml_elem.tag_ << ">";
-
-    for (auto c : xml_elem.txt_) {
-      switch (c) {
-        case '"':
-          out << "&quot;";
-          break;
-        case '\'':
-          out << "&apos;";
-          break;
-        case '&':
-          out << "&amp;";
-          break;
-        case '<':
-          out << "&lt;";
-          break;
-        case '>':
-          out << "&gt;";
-          break;
-        default:
-          out << c;
-          break;
-      }
-    }
-
-    return out << "</" << xml_elem.tag_ << ">";
-  }
-
- private:
-  absl::string_view tag_;
-  absl::string_view txt_;
-};
-
-// --------------------------------------------------------------------
-// Helper class to pretty-print info about a flag.
-
-class FlagHelpPrettyPrinter {
- public:
-  // Pretty printer holds on to the std::ostream& reference to direct an output
-  // to that stream.
-  FlagHelpPrettyPrinter(size_t max_line_len, size_t min_line_len,
-                        size_t wrapped_line_indent, std::ostream& out)
-      : out_(out),
-        max_line_len_(max_line_len),
-        min_line_len_(min_line_len),
-        wrapped_line_indent_(wrapped_line_indent),
-        line_len_(0),
-        first_line_(true) {}
-
-  void Write(absl::string_view str, bool wrap_line = false) {
-    // Empty string - do nothing.
-    if (str.empty()) return;
-
-    std::vector<absl::string_view> tokens;
-    if (wrap_line) {
-      for (auto line : absl::StrSplit(str, absl::ByAnyChar("\n\r"))) {
-        if (!tokens.empty()) {
-          // Keep line separators in the input string.
-          tokens.push_back("\n");
-        }
-        for (auto token :
-             absl::StrSplit(line, absl::ByAnyChar(" \t"), absl::SkipEmpty())) {
-          tokens.push_back(token);
-        }
-      }
-    } else {
-      tokens.push_back(str);
-    }
-
-    for (auto token : tokens) {
-      bool new_line = (line_len_ == 0);
-
-      // Respect line separators in the input string.
-      if (token == "\n") {
-        EndLine();
-        continue;
-      }
-
-      // Write the token, ending the string first if necessary/possible.
-      if (!new_line &&
-          (line_len_ + static_cast<int>(token.size()) >= max_line_len_)) {
-        EndLine();
-        new_line = true;
-      }
-
-      if (new_line) {
-        StartLine();
-      } else {
-        out_ << ' ';
-        ++line_len_;
-      }
-
-      out_ << token;
-      line_len_ += token.size();
-    }
-  }
-
-  void StartLine() {
-    if (first_line_) {
-      line_len_ = min_line_len_;
-      first_line_ = false;
-    } else {
-      line_len_ = min_line_len_ + wrapped_line_indent_;
-    }
-    out_ << std::string(line_len_, ' ');
-  }
-  void EndLine() {
-    out_ << '\n';
-    line_len_ = 0;
-  }
-
- private:
-  std::ostream& out_;
-  const size_t max_line_len_;
-  const size_t min_line_len_;
-  const size_t wrapped_line_indent_;
-  size_t line_len_;
-  bool first_line_;
-};
-
-void FlagHelpHumanReadable(const CommandLineFlag& flag, std::ostream& out) {
-  FlagHelpPrettyPrinter printer(kHrfMaxLineLength, 4, 2, out);
-
-  // Flag name.
-  printer.Write(absl::StrCat("--", flag.Name()));
-
-  // Flag help.
-  printer.Write(absl::StrCat("(", flag.Help(), ");"), /*wrap_line=*/true);
-
-  // The listed default value will be the actual default from the flag
-  // definition in the originating source file, unless the value has
-  // subsequently been modified using SetCommandLineOption() with mode
-  // SET_FLAGS_DEFAULT.
-  std::string dflt_val = flag.DefaultValue();
-  std::string curr_val = flag.CurrentValue();
-  bool is_modified = curr_val != dflt_val;
-
-  if (flag.IsOfType<std::string>()) {
-    dflt_val = absl::StrCat("\"", dflt_val, "\"");
-  }
-  printer.Write(absl::StrCat("default: ", dflt_val, ";"));
-
-  if (is_modified) {
-    if (flag.IsOfType<std::string>()) {
-      curr_val = absl::StrCat("\"", curr_val, "\"");
-    }
-    printer.Write(absl::StrCat("currently: ", curr_val, ";"));
-  }
-
-  printer.EndLine();
-}
-
-// Shows help for every filename which matches any of the filters
-// If filters are empty, shows help for every file.
-// If a flag's help message has been stripped (e.g. by adding '#define
-// STRIP_FLAG_HELP 1' then this flag will not be displayed by '--help'
-// and its variants.
-void FlagsHelpImpl(std::ostream& out, PerFlagFilter filter_cb,
-                   HelpFormat format, absl::string_view program_usage_message) {
-  if (format == HelpFormat::kHumanReadable) {
-    out << flags_internal::ShortProgramInvocationName() << ": "
-        << program_usage_message << "\n\n";
-  } else {
-    // XML schema is not a part of our public API for now.
-    out << "<?xml version=\"1.0\"?>\n"
-        << "<!-- This output should be used with care. We do not report type "
-           "names for flags with user defined types -->\n"
-        << "<!-- Prefer flag only_check_args for validating flag inputs -->\n"
-        // The document.
-        << "<AllFlags>\n"
-        // The program name and usage.
-        << XMLElement("program", flags_internal::ShortProgramInvocationName())
-        << '\n'
-        << XMLElement("usage", program_usage_message) << '\n';
-  }
-
-  // Map of package name to
-  //   map of file name to
-  //     vector of flags in the file.
-  // This map is used to output matching flags grouped by package and file
-  // name.
-  std::map<std::string,
-           std::map<std::string, std::vector<const absl::CommandLineFlag*>>>
-      matching_flags;
-
-  flags_internal::ForEachFlag([&](absl::CommandLineFlag& flag) {
-    // Ignore retired flags.
-    if (flag.IsRetired()) return;
-
-    // If the flag has been stripped, pretend that it doesn't exist.
-    if (flag.Help() == flags_internal::kStrippedFlagHelp) return;
-
-    // Make sure flag satisfies the filter
-    if (!filter_cb(flag)) return;
-
-    std::string flag_filename = flag.Filename();
-
-    matching_flags[std::string(flags_internal::Package(flag_filename))]
-                  [flag_filename]
-                      .push_back(&flag);
-  });
-
-  absl::string_view package_separator;  // controls blank lines between packages
-  absl::string_view file_separator;     // controls blank lines between files
-  for (const auto& package : matching_flags) {
-    if (format == HelpFormat::kHumanReadable) {
-      out << package_separator;
-      package_separator = "\n\n";
-    }
-
-    file_separator = "";
-    for (const auto& flags_in_file : package.second) {
-      if (format == HelpFormat::kHumanReadable) {
-        out << file_separator << "  Flags from " << flags_in_file.first
-            << ":\n";
-        file_separator = "\n";
-      }
-
-      for (const auto* flag : flags_in_file.second) {
-        flags_internal::FlagHelp(out, *flag, format);
-      }
-    }
-  }
-
-  if (format == HelpFormat::kHumanReadable) {
-    FlagHelpPrettyPrinter printer(kHrfMaxLineLength, 0, 0, out);
-
-    if (filter_cb && matching_flags.empty()) {
-      printer.Write("No flags matched.\n", true);
-    }
-    printer.EndLine();
-    printer.Write(
-        "Try --helpfull to get a list of all flags or --help=substring "
-        "shows help for flags which include specified substring in either "
-        "in the name, or description or path.\n",
-        true);
-  } else {
-    // The end of the document.
-    out << "</AllFlags>\n";
-  }
-}
-
-void FlagsHelpImpl(std::ostream& out,
-                   flags_internal::FlagKindFilter filename_filter_cb,
-                   HelpFormat format, absl::string_view program_usage_message) {
-  FlagsHelpImpl(
-      out,
-      [&](const absl::CommandLineFlag& flag) {
-        return filename_filter_cb && filename_filter_cb(flag.Filename());
-      },
-      format, program_usage_message);
-}
-
-}  // namespace
-
-// --------------------------------------------------------------------
-// Produces the help message describing specific flag.
-void FlagHelp(std::ostream& out, const CommandLineFlag& flag,
-              HelpFormat format) {
-  if (format == HelpFormat::kHumanReadable)
-    flags_internal::FlagHelpHumanReadable(flag, out);
-}
-
-// --------------------------------------------------------------------
-// Produces the help messages for all flags matching the filename filter.
-// If filter is empty produces help messages for all flags.
-void FlagsHelp(std::ostream& out, absl::string_view filter, HelpFormat format,
-               absl::string_view program_usage_message) {
-  flags_internal::FlagKindFilter filter_cb = [&](absl::string_view filename) {
-    return filter.empty() || filename.find(filter) != absl::string_view::npos;
-  };
-  flags_internal::FlagsHelpImpl(out, filter_cb, format, program_usage_message);
-}
-
-// --------------------------------------------------------------------
-// Checks all the 'usage' command line flags to see if any have been set.
-// If so, handles them appropriately.
-int HandleUsageFlags(std::ostream& out,
-                     absl::string_view program_usage_message) {
-  switch (GetFlagsHelpMode()) {
-    case HelpMode::kNone:
-      break;
-    case HelpMode::kImportant:
-      flags_internal::FlagsHelpImpl(
-          out, flags_internal::GetUsageConfig().contains_help_flags,
-          GetFlagsHelpFormat(), program_usage_message);
-      return 1;
-
-    case HelpMode::kShort:
-      flags_internal::FlagsHelpImpl(
-          out, flags_internal::GetUsageConfig().contains_helpshort_flags,
-          GetFlagsHelpFormat(), program_usage_message);
-      return 1;
-
-    case HelpMode::kFull:
-      flags_internal::FlagsHelp(out, "", GetFlagsHelpFormat(),
-                                program_usage_message);
-      return 1;
-
-    case HelpMode::kPackage:
-      flags_internal::FlagsHelpImpl(
-          out, flags_internal::GetUsageConfig().contains_helppackage_flags,
-          GetFlagsHelpFormat(), program_usage_message);
-
-      return 1;
-
-    case HelpMode::kMatch: {
-      std::string substr = GetFlagsHelpMatchSubstr();
-      if (substr.empty()) {
-        // show all options
-        flags_internal::FlagsHelp(out, substr, GetFlagsHelpFormat(),
-                                  program_usage_message);
-      } else {
-        auto filter_cb = [&substr](const absl::CommandLineFlag& flag) {
-          if (absl::StrContains(flag.Name(), substr)) return true;
-          if (absl::StrContains(flag.Filename(), substr)) return true;
-          if (absl::StrContains(flag.Help(), substr)) return true;
-
-          return false;
-        };
-        flags_internal::FlagsHelpImpl(
-            out, filter_cb, HelpFormat::kHumanReadable, program_usage_message);
-      }
-
-      return 1;
-    }
-    case HelpMode::kVersion:
-      if (flags_internal::GetUsageConfig().version_string)
-        out << flags_internal::GetUsageConfig().version_string();
-      // Unlike help, we may be asking for version in a script, so return 0
-      return 0;
-
-    case HelpMode::kOnlyCheckArgs:
-      return 0;
-  }
-
-  return -1;
-}
-
-// --------------------------------------------------------------------
-// Globals representing usage reporting flags
-
-namespace {
-
-ABSL_CONST_INIT absl::Mutex help_attributes_guard(absl::kConstInit);
-ABSL_CONST_INIT std::string* match_substr
-    ABSL_GUARDED_BY(help_attributes_guard) = nullptr;
-ABSL_CONST_INIT HelpMode help_mode ABSL_GUARDED_BY(help_attributes_guard) =
-    HelpMode::kNone;
-ABSL_CONST_INIT HelpFormat help_format ABSL_GUARDED_BY(help_attributes_guard) =
-    HelpFormat::kHumanReadable;
-
-}  // namespace
-
-std::string GetFlagsHelpMatchSubstr() {
-  absl::MutexLock l(&help_attributes_guard);
-  if (match_substr == nullptr) return "";
-  return *match_substr;
-}
-
-void SetFlagsHelpMatchSubstr(absl::string_view substr) {
-  absl::MutexLock l(&help_attributes_guard);
-  if (match_substr == nullptr) match_substr = new std::string;
-  match_substr->assign(substr.data(), substr.size());
-}
-
-HelpMode GetFlagsHelpMode() {
-  absl::MutexLock l(&help_attributes_guard);
-  return help_mode;
-}
-
-void SetFlagsHelpMode(HelpMode mode) {
-  absl::MutexLock l(&help_attributes_guard);
-  help_mode = mode;
-}
-
-HelpFormat GetFlagsHelpFormat() {
-  absl::MutexLock l(&help_attributes_guard);
-  return help_format;
-}
-
-void SetFlagsHelpFormat(HelpFormat format) {
-  absl::MutexLock l(&help_attributes_guard);
-  help_format = format;
-}
-
-// Deduces usage flags from the input argument in a form --name=value or
-// --name. argument is already split into name and value before we call this
-// function.
-bool DeduceUsageFlags(absl::string_view name, absl::string_view value) {
-  if (absl::ConsumePrefix(&name, "help")) {
-    if (name == "") {
-      if (value.empty()) {
-        SetFlagsHelpMode(HelpMode::kImportant);
-      } else {
-        SetFlagsHelpMode(HelpMode::kMatch);
-        SetFlagsHelpMatchSubstr(value);
-      }
-      return true;
-    }
-
-    if (name == "match") {
-      SetFlagsHelpMode(HelpMode::kMatch);
-      SetFlagsHelpMatchSubstr(value);
-      return true;
-    }
-
-    if (name == "on") {
-      SetFlagsHelpMode(HelpMode::kMatch);
-      SetFlagsHelpMatchSubstr(absl::StrCat("/", value, "."));
-      return true;
-    }
-
-    if (name == "full") {
-      SetFlagsHelpMode(HelpMode::kFull);
-      return true;
-    }
-
-    if (name == "short") {
-      SetFlagsHelpMode(HelpMode::kShort);
-      return true;
-    }
-
-    if (name == "package") {
-      SetFlagsHelpMode(HelpMode::kPackage);
-      return true;
-    }
-
-    return false;
-  }
-
-  if (name == "version") {
-    SetFlagsHelpMode(HelpMode::kVersion);
-    return true;
-  }
-
-  if (name == "only_check_args") {
-    SetFlagsHelpMode(HelpMode::kOnlyCheckArgs);
-    return true;
-  }
-
-  return false;
-}
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/internal/usage.h b/third_party/abseil/absl/flags/internal/usage.h
deleted file mode 100644
index c0bcac5..0000000
--- a/third_party/abseil/absl/flags/internal/usage.h
+++ /dev/null
@@ -1,104 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_INTERNAL_USAGE_H_
-#define ABSL_FLAGS_INTERNAL_USAGE_H_
-
-#include <iosfwd>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/declare.h"
-#include "absl/strings/string_view.h"
-
-// --------------------------------------------------------------------
-// Usage reporting interfaces
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// The format to report the help messages in.
-enum class HelpFormat {
-  kHumanReadable,
-};
-
-// Streams the help message describing `flag` to `out`.
-// The default value for `flag` is included in the output.
-void FlagHelp(std::ostream& out, const CommandLineFlag& flag,
-              HelpFormat format = HelpFormat::kHumanReadable);
-
-// Produces the help messages for all flags matching the filter. A flag matches
-// the filter if it is defined in a file with a filename which includes
-// filter string as a substring. You can use '/' and '.' to restrict the
-// matching to a specific file names. For example:
-//   FlagsHelp(out, "/path/to/file.");
-// restricts help to only flags which resides in files named like:
-//  .../path/to/file.<ext>
-// for any extension 'ext'. If the filter is empty this function produces help
-// messages for all flags.
-void FlagsHelp(std::ostream& out, absl::string_view filter,
-               HelpFormat format, absl::string_view program_usage_message);
-
-// --------------------------------------------------------------------
-
-// If any of the 'usage' related command line flags (listed on the bottom of
-// this file) has been set this routine produces corresponding help message in
-// the specified output stream and returns:
-//  0 - if "version" or "only_check_flags" flags were set and handled.
-//  1 - if some other 'usage' related flag was set and handled.
-// -1 - if no usage flags were set on a commmand line.
-// Non negative return values are expected to be used as an exit code for a
-// binary.
-int HandleUsageFlags(std::ostream& out,
-                     absl::string_view program_usage_message);
-
-// --------------------------------------------------------------------
-// Globals representing usage reporting flags
-
-enum class HelpMode {
-  kNone,
-  kImportant,
-  kShort,
-  kFull,
-  kPackage,
-  kMatch,
-  kVersion,
-  kOnlyCheckArgs
-};
-
-// Returns substring to filter help output (--help=substr argument)
-std::string GetFlagsHelpMatchSubstr();
-// Returns the requested help mode.
-HelpMode GetFlagsHelpMode();
-// Returns the requested help format.
-HelpFormat GetFlagsHelpFormat();
-
-// These are corresponding setters to the attributes above.
-void SetFlagsHelpMatchSubstr(absl::string_view);
-void SetFlagsHelpMode(HelpMode);
-void SetFlagsHelpFormat(HelpFormat);
-
-// Deduces usage flags from the input argument in a form --name=value or
-// --name. argument is already split into name and value before we call this
-// function.
-bool DeduceUsageFlags(absl::string_view name, absl::string_view value);
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_INTERNAL_USAGE_H_
diff --git a/third_party/abseil/absl/flags/internal/usage_test.cc b/third_party/abseil/absl/flags/internal/usage_test.cc
deleted file mode 100644
index b5c2487..0000000
--- a/third_party/abseil/absl/flags/internal/usage_test.cc
+++ /dev/null
@@ -1,493 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/internal/usage.h"
-
-#include <stdint.h>
-
-#include <sstream>
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/flags/flag.h"
-#include "absl/flags/internal/parse.h"
-#include "absl/flags/internal/path_util.h"
-#include "absl/flags/internal/program_name.h"
-#include "absl/flags/reflection.h"
-#include "absl/flags/usage.h"
-#include "absl/flags/usage_config.h"
-#include "absl/strings/match.h"
-#include "absl/strings/string_view.h"
-
-ABSL_FLAG(int, usage_reporting_test_flag_01, 101,
-          "usage_reporting_test_flag_01 help message");
-ABSL_FLAG(bool, usage_reporting_test_flag_02, false,
-          "usage_reporting_test_flag_02 help message");
-ABSL_FLAG(double, usage_reporting_test_flag_03, 1.03,
-          "usage_reporting_test_flag_03 help message");
-ABSL_FLAG(int64_t, usage_reporting_test_flag_04, 1000000000000004L,
-          "usage_reporting_test_flag_04 help message");
-
-static const char kTestUsageMessage[] = "Custom usage message";
-
-struct UDT {
-  UDT() = default;
-  UDT(const UDT&) = default;
-};
-bool AbslParseFlag(absl::string_view, UDT*, std::string*) { return true; }
-std::string AbslUnparseFlag(const UDT&) { return "UDT{}"; }
-
-ABSL_FLAG(UDT, usage_reporting_test_flag_05, {},
-          "usage_reporting_test_flag_05 help message");
-
-ABSL_FLAG(
-    std::string, usage_reporting_test_flag_06, {},
-    "usage_reporting_test_flag_06 help message.\n"
-    "\n"
-    "Some more help.\n"
-    "Even more long long long long long long long long long long long long "
-    "help message.");
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-static std::string NormalizeFileName(absl::string_view fname) {
-#ifdef _WIN32
-  std::string normalized(fname);
-  std::replace(normalized.begin(), normalized.end(), '\\', '/');
-  fname = normalized;
-#endif
-
-  auto absl_pos = fname.rfind("absl/");
-  if (absl_pos != absl::string_view::npos) {
-    fname = fname.substr(absl_pos);
-  }
-  return std::string(fname);
-}
-
-class UsageReportingTest : public testing::Test {
- protected:
-  UsageReportingTest() {
-    // Install default config for the use on this unit test.
-    // Binary may install a custom config before tests are run.
-    absl::FlagsUsageConfig default_config;
-    default_config.normalize_filename = &NormalizeFileName;
-    absl::SetFlagsUsageConfig(default_config);
-  }
-  ~UsageReportingTest() override {
-    flags::SetFlagsHelpMode(flags::HelpMode::kNone);
-    flags::SetFlagsHelpMatchSubstr("");
-    flags::SetFlagsHelpFormat(flags::HelpFormat::kHumanReadable);
-  }
-
- private:
-  absl::FlagSaver flag_saver_;
-};
-
-// --------------------------------------------------------------------
-
-using UsageReportingDeathTest = UsageReportingTest;
-
-TEST_F(UsageReportingDeathTest, TestSetProgramUsageMessage) {
-  EXPECT_EQ(absl::ProgramUsageMessage(), kTestUsageMessage);
-
-#ifndef _WIN32
-  // TODO(rogeeff): figure out why this does not work on Windows.
-  EXPECT_DEATH_IF_SUPPORTED(
-      absl::SetProgramUsageMessage("custom usage message"),
-      ".*SetProgramUsageMessage\\(\\) called twice.*");
-#endif
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_01) {
-  const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_01");
-  std::stringstream test_buf;
-
-  flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
-  EXPECT_EQ(
-      test_buf.str(),
-      R"(    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-)");
-}
-
-TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_02) {
-  const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_02");
-  std::stringstream test_buf;
-
-  flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
-  EXPECT_EQ(
-      test_buf.str(),
-      R"(    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-)");
-}
-
-TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_03) {
-  const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_03");
-  std::stringstream test_buf;
-
-  flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
-  EXPECT_EQ(
-      test_buf.str(),
-      R"(    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-)");
-}
-
-TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_04) {
-  const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_04");
-  std::stringstream test_buf;
-
-  flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
-  EXPECT_EQ(
-      test_buf.str(),
-      R"(    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-)");
-}
-
-TEST_F(UsageReportingTest, TestFlagHelpHRF_on_flag_05) {
-  const auto* flag = absl::FindCommandLineFlag("usage_reporting_test_flag_05");
-  std::stringstream test_buf;
-
-  flags::FlagHelp(test_buf, *flag, flags::HelpFormat::kHumanReadable);
-  EXPECT_EQ(
-      test_buf.str(),
-      R"(    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-)");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestFlagsHelpHRF) {
-  std::string usage_test_flags_out =
-      R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)";
-
-  std::stringstream test_buf_01;
-  flags::FlagsHelp(test_buf_01, "usage_test.cc",
-                   flags::HelpFormat::kHumanReadable, kTestUsageMessage);
-  EXPECT_EQ(test_buf_01.str(), usage_test_flags_out);
-
-  std::stringstream test_buf_02;
-  flags::FlagsHelp(test_buf_02, "flags/internal/usage_test.cc",
-                   flags::HelpFormat::kHumanReadable, kTestUsageMessage);
-  EXPECT_EQ(test_buf_02.str(), usage_test_flags_out);
-
-  std::stringstream test_buf_03;
-  flags::FlagsHelp(test_buf_03, "usage_test", flags::HelpFormat::kHumanReadable,
-                   kTestUsageMessage);
-  EXPECT_EQ(test_buf_03.str(), usage_test_flags_out);
-
-  std::stringstream test_buf_04;
-  flags::FlagsHelp(test_buf_04, "flags/invalid_file_name.cc",
-                   flags::HelpFormat::kHumanReadable, kTestUsageMessage);
-  EXPECT_EQ(test_buf_04.str(),
-            R"(usage_test: Custom usage message
-
-No flags matched.
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-
-  std::stringstream test_buf_05;
-  flags::FlagsHelp(test_buf_05, "", flags::HelpFormat::kHumanReadable,
-                   kTestUsageMessage);
-  std::string test_out = test_buf_05.str();
-  absl::string_view test_out_str(test_out);
-  EXPECT_TRUE(
-      absl::StartsWith(test_out_str, "usage_test: Custom usage message"));
-  EXPECT_TRUE(absl::StrContains(
-      test_out_str, "Flags from absl/flags/internal/usage_test.cc:"));
-  EXPECT_TRUE(
-      absl::StrContains(test_out_str, "-usage_reporting_test_flag_01 "));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestNoUsageFlags) {
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), -1);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_helpshort) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kShort);
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf.str(),
-            R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_help_simple) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kImportant);
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf.str(),
-            R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_help_one_flag) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kMatch);
-  flags::SetFlagsHelpMatchSubstr("usage_reporting_test_flag_06");
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf.str(),
-            R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_help_multiple_flag) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kMatch);
-  flags::SetFlagsHelpMatchSubstr("test_flag");
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf.str(),
-            R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_helppackage) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kPackage);
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf.str(),
-            R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_version) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kVersion);
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 0);
-#ifndef NDEBUG
-  EXPECT_EQ(test_buf.str(), "usage_test\nDebug build (NDEBUG not #defined)\n");
-#else
-  EXPECT_EQ(test_buf.str(), "usage_test\n");
-#endif
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_only_check_args) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kOnlyCheckArgs);
-
-  std::stringstream test_buf;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf, kTestUsageMessage), 0);
-  EXPECT_EQ(test_buf.str(), "");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(UsageReportingTest, TestUsageFlag_helpon) {
-  flags::SetFlagsHelpMode(flags::HelpMode::kMatch);
-  flags::SetFlagsHelpMatchSubstr("/bla-bla.");
-
-  std::stringstream test_buf_01;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf_01, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf_01.str(),
-            R"(usage_test: Custom usage message
-
-No flags matched.
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-
-  flags::SetFlagsHelpMatchSubstr("/usage_test.");
-
-  std::stringstream test_buf_02;
-  EXPECT_EQ(flags::HandleUsageFlags(test_buf_02, kTestUsageMessage), 1);
-  EXPECT_EQ(test_buf_02.str(),
-            R"(usage_test: Custom usage message
-
-  Flags from absl/flags/internal/usage_test.cc:
-    --usage_reporting_test_flag_01 (usage_reporting_test_flag_01 help message);
-      default: 101;
-    --usage_reporting_test_flag_02 (usage_reporting_test_flag_02 help message);
-      default: false;
-    --usage_reporting_test_flag_03 (usage_reporting_test_flag_03 help message);
-      default: 1.03;
-    --usage_reporting_test_flag_04 (usage_reporting_test_flag_04 help message);
-      default: 1000000000000004;
-    --usage_reporting_test_flag_05 (usage_reporting_test_flag_05 help message);
-      default: UDT{};
-    --usage_reporting_test_flag_06 (usage_reporting_test_flag_06 help message.
-
-      Some more help.
-      Even more long long long long long long long long long long long long help
-      message.); default: "";
-
-Try --helpfull to get a list of all flags or --help=substring shows help for
-flags which include specified substring in either in the name, or description or
-path.
-)");
-}
-
-// --------------------------------------------------------------------
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-  (void)absl::GetFlag(FLAGS_undefok);  // Force linking of parse.cc
-  flags::SetProgramInvocationName("usage_test");
-  absl::SetProgramUsageMessage(kTestUsageMessage);
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/abseil/absl/flags/marshalling.cc b/third_party/abseil/absl/flags/marshalling.cc
deleted file mode 100644
index 81f9ceb..0000000
--- a/third_party/abseil/absl/flags/marshalling.cc
+++ /dev/null
@@ -1,241 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/marshalling.h"
-
-#include <stddef.h>
-
-#include <cmath>
-#include <limits>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/base/log_severity.h"
-#include "absl/base/macros.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/match.h"
-#include "absl/strings/numbers.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_join.h"
-#include "absl/strings/str_split.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// --------------------------------------------------------------------
-// AbslParseFlag specializations for boolean type.
-
-bool AbslParseFlag(absl::string_view text, bool* dst, std::string*) {
-  const char* kTrue[] = {"1", "t", "true", "y", "yes"};
-  const char* kFalse[] = {"0", "f", "false", "n", "no"};
-  static_assert(sizeof(kTrue) == sizeof(kFalse), "true_false_equal");
-
-  text = absl::StripAsciiWhitespace(text);
-
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(kTrue); ++i) {
-    if (absl::EqualsIgnoreCase(text, kTrue[i])) {
-      *dst = true;
-      return true;
-    } else if (absl::EqualsIgnoreCase(text, kFalse[i])) {
-      *dst = false;
-      return true;
-    }
-  }
-  return false;  // didn't match a legal input
-}
-
-// --------------------------------------------------------------------
-// AbslParseFlag for integral types.
-
-// Return the base to use for parsing text as an integer.  Leading 0x
-// puts us in base 16.  But leading 0 does not put us in base 8. It
-// caused too many bugs when we had that behavior.
-static int NumericBase(absl::string_view text) {
-  const bool hex = (text.size() >= 2 && text[0] == '0' &&
-                    (text[1] == 'x' || text[1] == 'X'));
-  return hex ? 16 : 10;
-}
-
-template <typename IntType>
-inline bool ParseFlagImpl(absl::string_view text, IntType& dst) {
-  text = absl::StripAsciiWhitespace(text);
-
-  return absl::numbers_internal::safe_strtoi_base(text, &dst,
-                                                  NumericBase(text));
-}
-
-bool AbslParseFlag(absl::string_view text, short* dst, std::string*) {
-  int val;
-  if (!ParseFlagImpl(text, val)) return false;
-  if (static_cast<short>(val) != val)  // worked, but number out of range
-    return false;
-  *dst = static_cast<short>(val);
-  return true;
-}
-
-bool AbslParseFlag(absl::string_view text, unsigned short* dst, std::string*) {
-  unsigned int val;
-  if (!ParseFlagImpl(text, val)) return false;
-  if (static_cast<unsigned short>(val) !=
-      val)  // worked, but number out of range
-    return false;
-  *dst = static_cast<unsigned short>(val);
-  return true;
-}
-
-bool AbslParseFlag(absl::string_view text, int* dst, std::string*) {
-  return ParseFlagImpl(text, *dst);
-}
-
-bool AbslParseFlag(absl::string_view text, unsigned int* dst, std::string*) {
-  return ParseFlagImpl(text, *dst);
-}
-
-bool AbslParseFlag(absl::string_view text, long* dst, std::string*) {
-  return ParseFlagImpl(text, *dst);
-}
-
-bool AbslParseFlag(absl::string_view text, unsigned long* dst, std::string*) {
-  return ParseFlagImpl(text, *dst);
-}
-
-bool AbslParseFlag(absl::string_view text, long long* dst, std::string*) {
-  return ParseFlagImpl(text, *dst);
-}
-
-bool AbslParseFlag(absl::string_view text, unsigned long long* dst,
-                   std::string*) {
-  return ParseFlagImpl(text, *dst);
-}
-
-// --------------------------------------------------------------------
-// AbslParseFlag for floating point types.
-
-bool AbslParseFlag(absl::string_view text, float* dst, std::string*) {
-  return absl::SimpleAtof(text, dst);
-}
-
-bool AbslParseFlag(absl::string_view text, double* dst, std::string*) {
-  return absl::SimpleAtod(text, dst);
-}
-
-// --------------------------------------------------------------------
-// AbslParseFlag for strings.
-
-bool AbslParseFlag(absl::string_view text, std::string* dst, std::string*) {
-  dst->assign(text.data(), text.size());
-  return true;
-}
-
-// --------------------------------------------------------------------
-// AbslParseFlag for vector of strings.
-
-bool AbslParseFlag(absl::string_view text, std::vector<std::string>* dst,
-                   std::string*) {
-  // An empty flag value corresponds to an empty vector, not a vector
-  // with a single, empty std::string.
-  if (text.empty()) {
-    dst->clear();
-    return true;
-  }
-  *dst = absl::StrSplit(text, ',', absl::AllowEmpty());
-  return true;
-}
-
-// --------------------------------------------------------------------
-// AbslUnparseFlag specializations for various builtin flag types.
-
-std::string Unparse(bool v) { return v ? "true" : "false"; }
-std::string Unparse(short v) { return absl::StrCat(v); }
-std::string Unparse(unsigned short v) { return absl::StrCat(v); }
-std::string Unparse(int v) { return absl::StrCat(v); }
-std::string Unparse(unsigned int v) { return absl::StrCat(v); }
-std::string Unparse(long v) { return absl::StrCat(v); }
-std::string Unparse(unsigned long v) { return absl::StrCat(v); }
-std::string Unparse(long long v) { return absl::StrCat(v); }
-std::string Unparse(unsigned long long v) { return absl::StrCat(v); }
-template <typename T>
-std::string UnparseFloatingPointVal(T v) {
-  // digits10 is guaranteed to roundtrip correctly in string -> value -> string
-  // conversions, but may not be enough to represent all the values correctly.
-  std::string digit10_str =
-      absl::StrFormat("%.*g", std::numeric_limits<T>::digits10, v);
-  if (std::isnan(v) || std::isinf(v)) return digit10_str;
-
-  T roundtrip_val = 0;
-  std::string err;
-  if (absl::ParseFlag(digit10_str, &roundtrip_val, &err) &&
-      roundtrip_val == v) {
-    return digit10_str;
-  }
-
-  // max_digits10 is the number of base-10 digits that are necessary to uniquely
-  // represent all distinct values.
-  return absl::StrFormat("%.*g", std::numeric_limits<T>::max_digits10, v);
-}
-std::string Unparse(float v) { return UnparseFloatingPointVal(v); }
-std::string Unparse(double v) { return UnparseFloatingPointVal(v); }
-std::string AbslUnparseFlag(absl::string_view v) { return std::string(v); }
-std::string AbslUnparseFlag(const std::vector<std::string>& v) {
-  return absl::StrJoin(v, ",");
-}
-
-}  // namespace flags_internal
-
-bool AbslParseFlag(absl::string_view text, absl::LogSeverity* dst,
-                   std::string* err) {
-  text = absl::StripAsciiWhitespace(text);
-  if (text.empty()) {
-    *err = "no value provided";
-    return false;
-  }
-  if (text.front() == 'k' || text.front() == 'K') text.remove_prefix(1);
-  if (absl::EqualsIgnoreCase(text, "info")) {
-    *dst = absl::LogSeverity::kInfo;
-    return true;
-  }
-  if (absl::EqualsIgnoreCase(text, "warning")) {
-    *dst = absl::LogSeverity::kWarning;
-    return true;
-  }
-  if (absl::EqualsIgnoreCase(text, "error")) {
-    *dst = absl::LogSeverity::kError;
-    return true;
-  }
-  if (absl::EqualsIgnoreCase(text, "fatal")) {
-    *dst = absl::LogSeverity::kFatal;
-    return true;
-  }
-  std::underlying_type<absl::LogSeverity>::type numeric_value;
-  if (absl::ParseFlag(text, &numeric_value, err)) {
-    *dst = static_cast<absl::LogSeverity>(numeric_value);
-    return true;
-  }
-  *err = "only integers and absl::LogSeverity enumerators are accepted";
-  return false;
-}
-
-std::string AbslUnparseFlag(absl::LogSeverity v) {
-  if (v == absl::NormalizeLogSeverity(v)) return absl::LogSeverityName(v);
-  return absl::UnparseFlag(static_cast<int>(v));
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/marshalling.h b/third_party/abseil/absl/flags/marshalling.h
deleted file mode 100644
index 0b50335..0000000
--- a/third_party/abseil/absl/flags/marshalling.h
+++ /dev/null
@@ -1,264 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: marshalling.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the API for extending Abseil flag support to
-// custom types, and defines the set of overloads for fundamental types.
-//
-// Out of the box, the Abseil flags library supports the following types:
-//
-// * `bool`
-// * `int16_t`
-// * `uint16_t`
-// * `int32_t`
-// * `uint32_t`
-// * `int64_t`
-// * `uint64_t`
-// * `float`
-// * `double`
-// * `std::string`
-// * `std::vector<std::string>`
-// * `absl::LogSeverity` (provided natively for layering reasons)
-//
-// Note that support for integral types is implemented using overloads for
-// variable-width fundamental types (`short`, `int`, `long`, etc.). However,
-// you should prefer the fixed-width integral types (`int32_t`, `uint64_t`,
-// etc.) we've noted above within flag definitions.
-//
-// In addition, several Abseil libraries provide their own custom support for
-// Abseil flags. Documentation for these formats is provided in the type's
-// `AbslParseFlag()` definition.
-//
-// The Abseil time library provides the following support for civil time values:
-//
-// * `absl::CivilSecond`
-// * `absl::CivilMinute`
-// * `absl::CivilHour`
-// * `absl::CivilDay`
-// * `absl::CivilMonth`
-// * `absl::CivilYear`
-//
-// and also provides support for the following absolute time values:
-//
-// * `absl::Duration`
-// * `absl::Time`
-//
-// Additional support for Abseil types will be noted here as it is added.
-//
-// You can also provide your own custom flags by adding overloads for
-// `AbslParseFlag()` and `AbslUnparseFlag()` to your type definitions. (See
-// below.)
-//
-// -----------------------------------------------------------------------------
-// Adding Type Support for Abseil Flags
-// -----------------------------------------------------------------------------
-//
-// To add support for your user-defined type, add overloads of `AbslParseFlag()`
-// and `AbslUnparseFlag()` as free (non-member) functions to your type. If `T`
-// is a class type, these functions can be friend function definitions. These
-// overloads must be added to the same namespace where the type is defined, so
-// that they can be discovered by Argument-Dependent Lookup (ADL).
-//
-// Example:
-//
-//   namespace foo {
-//
-//   enum OutputMode { kPlainText, kHtml };
-//
-//   // AbslParseFlag converts from a string to OutputMode.
-//   // Must be in same namespace as OutputMode.
-//
-//   // Parses an OutputMode from the command line flag value `text. Returns
-//   // `true` and sets `*mode` on success; returns `false` and sets `*error`
-//   // on failure.
-//   bool AbslParseFlag(absl::string_view text,
-//                      OutputMode* mode,
-//                      std::string* error) {
-//     if (text == "plaintext") {
-//       *mode = kPlainText;
-//       return true;
-//     }
-//     if (text == "html") {
-//       *mode = kHtml;
-//      return true;
-//     }
-//     *error = "unknown value for enumeration";
-//     return false;
-//  }
-//
-//  // AbslUnparseFlag converts from an OutputMode to a string.
-//  // Must be in same namespace as OutputMode.
-//
-//  // Returns a textual flag value corresponding to the OutputMode `mode`.
-//  std::string AbslUnparseFlag(OutputMode mode) {
-//    switch (mode) {
-//      case kPlainText: return "plaintext";
-//      case kHtml: return "html";
-//    }
-//    return absl::StrCat(mode);
-//  }
-//
-// Notice that neither `AbslParseFlag()` nor `AbslUnparseFlag()` are class
-// members, but free functions. `AbslParseFlag/AbslUnparseFlag()` overloads
-// for a type should only be declared in the same file and namespace as said
-// type. The proper `AbslParseFlag/AbslUnparseFlag()` implementations for a
-// given type will be discovered via Argument-Dependent Lookup (ADL).
-//
-// `AbslParseFlag()` may need, in turn, to parse simpler constituent types
-// using `absl::ParseFlag()`. For example, a custom struct `MyFlagType`
-// consisting of a `std::pair<int, std::string>` would add an `AbslParseFlag()`
-// overload for its `MyFlagType` like so:
-//
-// Example:
-//
-//   namespace my_flag_type {
-//
-//   struct MyFlagType {
-//     std::pair<int, std::string> my_flag_data;
-//   };
-//
-//   bool AbslParseFlag(absl::string_view text, MyFlagType* flag,
-//                      std::string* err);
-//
-//   std::string AbslUnparseFlag(const MyFlagType&);
-//
-//   // Within the implementation, `AbslParseFlag()` will, in turn invoke
-//   // `absl::ParseFlag()` on its constituent `int` and `std::string` types
-//   // (which have built-in Abseil flag support.
-//
-//   bool AbslParseFlag(absl::string_view text, MyFlagType* flag,
-//                      std::string* err) {
-//     std::pair<absl::string_view, absl::string_view> tokens =
-//         absl::StrSplit(text, ',');
-//     if (!absl::ParseFlag(tokens.first, &flag->my_flag_data.first, err))
-//         return false;
-//     if (!absl::ParseFlag(tokens.second, &flag->my_flag_data.second, err))
-//         return false;
-//     return true;
-//   }
-//
-//   // Similarly, for unparsing, we can simply invoke `absl::UnparseFlag()` on
-//   // the constituent types.
-//   std::string AbslUnparseFlag(const MyFlagType& flag) {
-//     return absl::StrCat(absl::UnparseFlag(flag.my_flag_data.first),
-//                         ",",
-//                         absl::UnparseFlag(flag.my_flag_data.second));
-//   }
-#ifndef ABSL_FLAGS_MARSHALLING_H_
-#define ABSL_FLAGS_MARSHALLING_H_
-
-#include <string>
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// Overloads of `AbslParseFlag()` and `AbslUnparseFlag()` for fundamental types.
-bool AbslParseFlag(absl::string_view, bool*, std::string*);
-bool AbslParseFlag(absl::string_view, short*, std::string*);           // NOLINT
-bool AbslParseFlag(absl::string_view, unsigned short*, std::string*);  // NOLINT
-bool AbslParseFlag(absl::string_view, int*, std::string*);             // NOLINT
-bool AbslParseFlag(absl::string_view, unsigned int*, std::string*);    // NOLINT
-bool AbslParseFlag(absl::string_view, long*, std::string*);            // NOLINT
-bool AbslParseFlag(absl::string_view, unsigned long*, std::string*);   // NOLINT
-bool AbslParseFlag(absl::string_view, long long*, std::string*);       // NOLINT
-bool AbslParseFlag(absl::string_view, unsigned long long*,             // NOLINT
-                   std::string*);
-bool AbslParseFlag(absl::string_view, float*, std::string*);
-bool AbslParseFlag(absl::string_view, double*, std::string*);
-bool AbslParseFlag(absl::string_view, std::string*, std::string*);
-bool AbslParseFlag(absl::string_view, std::vector<std::string>*, std::string*);
-
-template <typename T>
-bool InvokeParseFlag(absl::string_view input, T* dst, std::string* err) {
-  // Comment on next line provides a good compiler error message if T
-  // does not have AbslParseFlag(absl::string_view, T*, std::string*).
-  return AbslParseFlag(input, dst, err);  // Is T missing AbslParseFlag?
-}
-
-// Strings and std:: containers do not have the same overload resolution
-// considerations as fundamental types. Naming these 'AbslUnparseFlag' means we
-// can avoid the need for additional specializations of Unparse (below).
-std::string AbslUnparseFlag(absl::string_view v);
-std::string AbslUnparseFlag(const std::vector<std::string>&);
-
-template <typename T>
-std::string Unparse(const T& v) {
-  // Comment on next line provides a good compiler error message if T does not
-  // have UnparseFlag.
-  return AbslUnparseFlag(v);  // Is T missing AbslUnparseFlag?
-}
-
-// Overloads for builtin types.
-std::string Unparse(bool v);
-std::string Unparse(short v);               // NOLINT
-std::string Unparse(unsigned short v);      // NOLINT
-std::string Unparse(int v);                 // NOLINT
-std::string Unparse(unsigned int v);        // NOLINT
-std::string Unparse(long v);                // NOLINT
-std::string Unparse(unsigned long v);       // NOLINT
-std::string Unparse(long long v);           // NOLINT
-std::string Unparse(unsigned long long v);  // NOLINT
-std::string Unparse(float v);
-std::string Unparse(double v);
-
-}  // namespace flags_internal
-
-// ParseFlag()
-//
-// Parses a string value into a flag value of type `T`. Do not add overloads of
-// this function for your type directly; instead, add an `AbslParseFlag()`
-// free function as documented above.
-//
-// Some implementations of `AbslParseFlag()` for types which consist of other,
-// constituent types which already have Abseil flag support, may need to call
-// `absl::ParseFlag()` on those consituent string values. (See above.)
-template <typename T>
-inline bool ParseFlag(absl::string_view input, T* dst, std::string* error) {
-  return flags_internal::InvokeParseFlag(input, dst, error);
-}
-
-// UnparseFlag()
-//
-// Unparses a flag value of type `T` into a string value. Do not add overloads
-// of this function for your type directly; instead, add an `AbslUnparseFlag()`
-// free function as documented above.
-//
-// Some implementations of `AbslUnparseFlag()` for types which consist of other,
-// constituent types which already have Abseil flag support, may want to call
-// `absl::UnparseFlag()` on those constituent types. (See above.)
-template <typename T>
-inline std::string UnparseFlag(const T& v) {
-  return flags_internal::Unparse(v);
-}
-
-// Overloads for `absl::LogSeverity` can't (easily) appear alongside that type's
-// definition because it is layered below flags.  See proper documentation in
-// base/log_severity.h.
-enum class LogSeverity : int;
-bool AbslParseFlag(absl::string_view, absl::LogSeverity*, std::string*);
-std::string AbslUnparseFlag(absl::LogSeverity);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_MARSHALLING_H_
diff --git a/third_party/abseil/absl/flags/marshalling_test.cc b/third_party/abseil/absl/flags/marshalling_test.cc
deleted file mode 100644
index 4a64ce1..0000000
--- a/third_party/abseil/absl/flags/marshalling_test.cc
+++ /dev/null
@@ -1,904 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/marshalling.h"
-
-#include <stdint.h>
-
-#include <cmath>
-#include <limits>
-#include <string>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(MarshallingTest, TestBoolParsing) {
-  std::string err;
-  bool value;
-
-  // True values.
-  EXPECT_TRUE(absl::ParseFlag("True", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("true", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("TRUE", &value, &err));
-  EXPECT_TRUE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("Yes", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("yes", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("YES", &value, &err));
-  EXPECT_TRUE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("t", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("T", &value, &err));
-  EXPECT_TRUE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("y", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("Y", &value, &err));
-  EXPECT_TRUE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_TRUE(value);
-
-  // False values.
-  EXPECT_TRUE(absl::ParseFlag("False", &value, &err));
-  EXPECT_FALSE(value);
-  EXPECT_TRUE(absl::ParseFlag("false", &value, &err));
-  EXPECT_FALSE(value);
-  EXPECT_TRUE(absl::ParseFlag("FALSE", &value, &err));
-  EXPECT_FALSE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("No", &value, &err));
-  EXPECT_FALSE(value);
-  EXPECT_TRUE(absl::ParseFlag("no", &value, &err));
-  EXPECT_FALSE(value);
-  EXPECT_TRUE(absl::ParseFlag("NO", &value, &err));
-  EXPECT_FALSE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("f", &value, &err));
-  EXPECT_FALSE(value);
-  EXPECT_TRUE(absl::ParseFlag("F", &value, &err));
-  EXPECT_FALSE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("n", &value, &err));
-  EXPECT_FALSE(value);
-  EXPECT_TRUE(absl::ParseFlag("N", &value, &err));
-  EXPECT_FALSE(value);
-
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_FALSE(value);
-
-  // Whitespace handling.
-  EXPECT_TRUE(absl::ParseFlag("  true", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("true  ", &value, &err));
-  EXPECT_TRUE(value);
-  EXPECT_TRUE(absl::ParseFlag("  true   ", &value, &err));
-  EXPECT_TRUE(value);
-
-  // Invalid input.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("11", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("tt", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestInt16Parsing) {
-  std::string err;
-  int16_t value;
-
-  // Decimal values.
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("-1", &value, &err));
-  EXPECT_EQ(value, -1);
-  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
-  EXPECT_EQ(value, 123);
-  EXPECT_TRUE(absl::ParseFlag("-18765", &value, &err));
-  EXPECT_EQ(value, -18765);
-  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
-  EXPECT_EQ(value, 3);
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("-001", &value, &err));
-  EXPECT_EQ(value, -1);
-  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
-  EXPECT_EQ(value, 100);
-
-  // Hex values.
-  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
-  EXPECT_EQ(value, 16);
-  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
-  EXPECT_EQ(value, 564);
-  // TODO(rogeeff): fix below validations
-  EXPECT_FALSE(absl::ParseFlag("-0x7FFD", &value, &err));
-  EXPECT_NE(value, -3);
-  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
-  EXPECT_NE(value, 49);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
-  EXPECT_EQ(value, 10);
-  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
-  EXPECT_EQ(value, 11);
-  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
-  EXPECT_EQ(value, 12);
-  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
-  EXPECT_EQ(value, 34);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("40000", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestUint16Parsing) {
-  std::string err;
-  uint16_t value;
-
-  // Decimal values.
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
-  EXPECT_EQ(value, 123);
-  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
-  EXPECT_EQ(value, 3);
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("001", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
-  EXPECT_EQ(value, 100);
-
-  // Hex values.
-  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
-  EXPECT_EQ(value, 16);
-  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
-  EXPECT_EQ(value, 564);
-  // TODO(rogeeff): fix below validations
-  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
-  EXPECT_NE(value, 49);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
-  EXPECT_EQ(value, 10);
-  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
-  EXPECT_EQ(value, 11);
-  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
-  EXPECT_EQ(value, 12);
-  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
-  EXPECT_EQ(value, 34);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("70000", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("-1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestInt32Parsing) {
-  std::string err;
-  int32_t value;
-
-  // Decimal values.
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("-1", &value, &err));
-  EXPECT_EQ(value, -1);
-  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
-  EXPECT_EQ(value, 123);
-  EXPECT_TRUE(absl::ParseFlag("-98765", &value, &err));
-  EXPECT_EQ(value, -98765);
-  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
-  EXPECT_EQ(value, 3);
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("-001", &value, &err));
-  EXPECT_EQ(value, -1);
-  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
-  EXPECT_EQ(value, 100);
-
-  // Hex values.
-  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
-  EXPECT_EQ(value, 16);
-  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
-  EXPECT_EQ(value, 564);
-  // TODO(rogeeff): fix below validations
-  EXPECT_FALSE(absl::ParseFlag("-0x7FFFFFFD", &value, &err));
-  EXPECT_NE(value, -3);
-  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
-  EXPECT_NE(value, 49);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
-  EXPECT_EQ(value, 10);
-  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
-  EXPECT_EQ(value, 11);
-  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
-  EXPECT_EQ(value, 12);
-  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
-  EXPECT_EQ(value, 34);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("70000000000", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestUint32Parsing) {
-  std::string err;
-  uint32_t value;
-
-  // Decimal values.
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
-  EXPECT_EQ(value, 123);
-  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
-  EXPECT_EQ(value, 3);
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
-  EXPECT_EQ(value, 100);
-
-  // Hex values.
-  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
-  EXPECT_EQ(value, 16);
-  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
-  EXPECT_EQ(value, 564);
-  EXPECT_TRUE(absl::ParseFlag("0xFFFFFFFD", &value, &err));
-  EXPECT_EQ(value, 4294967293);
-  // TODO(rogeeff): fix below validations
-  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
-  EXPECT_NE(value, 49);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
-  EXPECT_EQ(value, 10);
-  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
-  EXPECT_EQ(value, 11);
-  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
-  EXPECT_EQ(value, 12);
-  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
-  EXPECT_EQ(value, 34);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("140000000000", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("-1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestInt64Parsing) {
-  std::string err;
-  int64_t value;
-
-  // Decimal values.
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("-1", &value, &err));
-  EXPECT_EQ(value, -1);
-  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
-  EXPECT_EQ(value, 123);
-  EXPECT_TRUE(absl::ParseFlag("-98765", &value, &err));
-  EXPECT_EQ(value, -98765);
-  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
-  EXPECT_EQ(value, 3);
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("001", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
-  EXPECT_EQ(value, 100);
-
-  // Hex values.
-  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
-  EXPECT_EQ(value, 16);
-  EXPECT_TRUE(absl::ParseFlag("0XFFFAAABBBCCCDDD", &value, &err));
-  EXPECT_EQ(value, 1152827684197027293);
-  // TODO(rogeeff): fix below validation
-  EXPECT_FALSE(absl::ParseFlag("-0x7FFFFFFFFFFFFFFE", &value, &err));
-  EXPECT_NE(value, -2);
-  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
-  EXPECT_NE(value, 49);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
-  EXPECT_EQ(value, 10);
-  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
-  EXPECT_EQ(value, 11);
-  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
-  EXPECT_EQ(value, 12);
-  EXPECT_TRUE(absl::ParseFlag(" 0x7F    ", &value, &err));
-  EXPECT_EQ(value, 127);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("0xFFFFFFFFFFFFFFFFFF", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestUInt64Parsing) {
-  std::string err;
-  uint64_t value;
-
-  // Decimal values.
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
-  EXPECT_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
-  EXPECT_EQ(value, 123);
-  EXPECT_TRUE(absl::ParseFlag("+13", &value, &err));
-  EXPECT_EQ(value, 13);
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("001", &value, &err));
-  EXPECT_EQ(value, 1);
-  EXPECT_TRUE(absl::ParseFlag("0000300", &value, &err));
-  EXPECT_EQ(value, 300);
-
-  // Hex values.
-  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
-  EXPECT_EQ(value, 16);
-  EXPECT_TRUE(absl::ParseFlag("0XFFFF", &value, &err));
-  EXPECT_EQ(value, 65535);
-  // TODO(rogeeff): fix below validation
-  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
-  EXPECT_NE(value, 49);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
-  EXPECT_EQ(value, 10);
-  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
-  EXPECT_EQ(value, 11);
-  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
-  EXPECT_EQ(value, 12);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("0xFFFFFFFFFFFFFFFFFF", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("-1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestFloatParsing) {
-  std::string err;
-  float value;
-
-  // Ordinary values.
-  EXPECT_TRUE(absl::ParseFlag("1.3", &value, &err));
-  EXPECT_FLOAT_EQ(value, 1.3f);
-  EXPECT_TRUE(absl::ParseFlag("-0.1", &value, &err));
-  EXPECT_DOUBLE_EQ(value, -0.1f);
-  EXPECT_TRUE(absl::ParseFlag("+0.01", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.01f);
-
-  // Scientific values.
-  EXPECT_TRUE(absl::ParseFlag("1.2e3", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 1.2e3f);
-  EXPECT_TRUE(absl::ParseFlag("9.8765402e-37", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 9.8765402e-37f);
-  EXPECT_TRUE(absl::ParseFlag("0.11e+3", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.11e+3f);
-  EXPECT_TRUE(absl::ParseFlag("1.e-2300", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.f);
-  EXPECT_TRUE(absl::ParseFlag("1.e+2300", &value, &err));
-  EXPECT_TRUE(std::isinf(value));
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01.6", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 1.6f);
-  EXPECT_TRUE(absl::ParseFlag("000.0001", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.0001f);
-
-  // Trailing zero values.
-  EXPECT_TRUE(absl::ParseFlag("-5.1000", &value, &err));
-  EXPECT_DOUBLE_EQ(value, -5.1f);
-
-  // Exceptional values.
-  EXPECT_TRUE(absl::ParseFlag("NaN", &value, &err));
-  EXPECT_TRUE(std::isnan(value));
-  EXPECT_TRUE(absl::ParseFlag("Inf", &value, &err));
-  EXPECT_TRUE(std::isinf(value));
-
-  // Hex values
-  EXPECT_TRUE(absl::ParseFlag("0x10.23p12", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 66096.f);
-  EXPECT_TRUE(absl::ParseFlag("-0xF1.A3p-2", &value, &err));
-  EXPECT_NEAR(value, -60.4092f, 5e-5f);
-  EXPECT_TRUE(absl::ParseFlag("+0x0.0AAp-12", &value, &err));
-  EXPECT_NEAR(value, 1.01328e-05f, 5e-11f);
-  EXPECT_TRUE(absl::ParseFlag("0x.01p1", &value, &err));
-  EXPECT_NEAR(value, 0.0078125f, 5e-8f);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10.1  ", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 10.1f);
-  EXPECT_TRUE(absl::ParseFlag("  2.34", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 2.34f);
-  EXPECT_TRUE(absl::ParseFlag("  5.7  ", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 5.7f);
-  EXPECT_TRUE(absl::ParseFlag("  -0xE0.F3p01  ", &value, &err));
-  EXPECT_NEAR(value, -449.8984375f, 5e-8f);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2.3xxx", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("0x0.1pAA", &value, &err));
-  // TODO(rogeeff): below assertion should fail
-  EXPECT_TRUE(absl::ParseFlag("0x0.1", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestDoubleParsing) {
-  std::string err;
-  double value;
-
-  // Ordinary values.
-  EXPECT_TRUE(absl::ParseFlag("1.3", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 1.3);
-  EXPECT_TRUE(absl::ParseFlag("-0.1", &value, &err));
-  EXPECT_DOUBLE_EQ(value, -0.1);
-  EXPECT_TRUE(absl::ParseFlag("+0.01", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.01);
-
-  // Scientific values.
-  EXPECT_TRUE(absl::ParseFlag("1.2e3", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 1.2e3);
-  EXPECT_TRUE(absl::ParseFlag("9.00000002e-123", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 9.00000002e-123);
-  EXPECT_TRUE(absl::ParseFlag("0.11e+3", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.11e+3);
-  EXPECT_TRUE(absl::ParseFlag("1.e-2300", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0);
-  EXPECT_TRUE(absl::ParseFlag("1.e+2300", &value, &err));
-  EXPECT_TRUE(std::isinf(value));
-
-  // Leading zero values.
-  EXPECT_TRUE(absl::ParseFlag("01.6", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 1.6);
-  EXPECT_TRUE(absl::ParseFlag("000.0001", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 0.0001);
-
-  // Trailing zero values.
-  EXPECT_TRUE(absl::ParseFlag("-5.1000", &value, &err));
-  EXPECT_DOUBLE_EQ(value, -5.1);
-
-  // Exceptional values.
-  EXPECT_TRUE(absl::ParseFlag("NaN", &value, &err));
-  EXPECT_TRUE(std::isnan(value));
-  EXPECT_TRUE(absl::ParseFlag("nan", &value, &err));
-  EXPECT_TRUE(std::isnan(value));
-  EXPECT_TRUE(absl::ParseFlag("Inf", &value, &err));
-  EXPECT_TRUE(std::isinf(value));
-  EXPECT_TRUE(absl::ParseFlag("inf", &value, &err));
-  EXPECT_TRUE(std::isinf(value));
-
-  // Hex values
-  EXPECT_TRUE(absl::ParseFlag("0x10.23p12", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 66096);
-  EXPECT_TRUE(absl::ParseFlag("-0xF1.A3p-2", &value, &err));
-  EXPECT_NEAR(value, -60.4092, 5e-5);
-  EXPECT_TRUE(absl::ParseFlag("+0x0.0AAp-12", &value, &err));
-  EXPECT_NEAR(value, 1.01328e-05, 5e-11);
-  EXPECT_TRUE(absl::ParseFlag("0x.01p1", &value, &err));
-  EXPECT_NEAR(value, 0.0078125, 5e-8);
-
-  // Whitespace handling
-  EXPECT_TRUE(absl::ParseFlag("10.1  ", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 10.1);
-  EXPECT_TRUE(absl::ParseFlag("  2.34", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 2.34);
-  EXPECT_TRUE(absl::ParseFlag("  5.7  ", &value, &err));
-  EXPECT_DOUBLE_EQ(value, 5.7);
-  EXPECT_TRUE(absl::ParseFlag("  -0xE0.F3p01  ", &value, &err));
-  EXPECT_NEAR(value, -449.8984375, 5e-8);
-
-  // Invalid values.
-  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("2.3xxx", &value, &err));
-  EXPECT_FALSE(absl::ParseFlag("0x0.1pAA", &value, &err));
-  // TODO(rogeeff): below assertion should fail
-  EXPECT_TRUE(absl::ParseFlag("0x0.1", &value, &err));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestStringParsing) {
-  std::string err;
-  std::string value;
-
-  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
-  EXPECT_EQ(value, "");
-  EXPECT_TRUE(absl::ParseFlag(" ", &value, &err));
-  EXPECT_EQ(value, " ");
-  EXPECT_TRUE(absl::ParseFlag("   ", &value, &err));
-  EXPECT_EQ(value, "   ");
-  EXPECT_TRUE(absl::ParseFlag("\n", &value, &err));
-  EXPECT_EQ(value, "\n");
-  EXPECT_TRUE(absl::ParseFlag("\t", &value, &err));
-  EXPECT_EQ(value, "\t");
-  EXPECT_TRUE(absl::ParseFlag("asdfg", &value, &err));
-  EXPECT_EQ(value, "asdfg");
-  EXPECT_TRUE(absl::ParseFlag("asdf ghjk", &value, &err));
-  EXPECT_EQ(value, "asdf ghjk");
-  EXPECT_TRUE(absl::ParseFlag("a\nb\nc", &value, &err));
-  EXPECT_EQ(value, "a\nb\nc");
-  EXPECT_TRUE(absl::ParseFlag("asd\0fgh", &value, &err));
-  EXPECT_EQ(value, "asd");
-  EXPECT_TRUE(absl::ParseFlag("\\\\", &value, &err));
-  EXPECT_EQ(value, "\\\\");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestVectorOfStringParsing) {
-  std::string err;
-  std::vector<std::string> value;
-
-  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>{});
-  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>({"1"}));
-  EXPECT_TRUE(absl::ParseFlag("a,b", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>({"a", "b"}));
-  EXPECT_TRUE(absl::ParseFlag("a,b,c,", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>({"a", "b", "c", ""}));
-  EXPECT_TRUE(absl::ParseFlag("a,,", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>({"a", "", ""}));
-  EXPECT_TRUE(absl::ParseFlag(",", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>({"", ""}));
-  EXPECT_TRUE(absl::ParseFlag("a, b,c ", &value, &err));
-  EXPECT_EQ(value, std::vector<std::string>({"a", " b", "c "}));
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestBoolUnparsing) {
-  EXPECT_EQ(absl::UnparseFlag(true), "true");
-  EXPECT_EQ(absl::UnparseFlag(false), "false");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestInt16Unparsing) {
-  int16_t value;
-
-  value = 1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1");
-  value = 0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = -1;
-  EXPECT_EQ(absl::UnparseFlag(value), "-1");
-  value = 9876;
-  EXPECT_EQ(absl::UnparseFlag(value), "9876");
-  value = -987;
-  EXPECT_EQ(absl::UnparseFlag(value), "-987");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestUint16Unparsing) {
-  uint16_t value;
-
-  value = 1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1");
-  value = 0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = 19876;
-  EXPECT_EQ(absl::UnparseFlag(value), "19876");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestInt32Unparsing) {
-  int32_t value;
-
-  value = 1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1");
-  value = 0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = -1;
-  EXPECT_EQ(absl::UnparseFlag(value), "-1");
-  value = 12345;
-  EXPECT_EQ(absl::UnparseFlag(value), "12345");
-  value = -987;
-  EXPECT_EQ(absl::UnparseFlag(value), "-987");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestUint32Unparsing) {
-  uint32_t value;
-
-  value = 1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1");
-  value = 0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = 1234500;
-  EXPECT_EQ(absl::UnparseFlag(value), "1234500");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestInt64Unparsing) {
-  int64_t value;
-
-  value = 1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1");
-  value = 0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = -1;
-  EXPECT_EQ(absl::UnparseFlag(value), "-1");
-  value = 123456789L;
-  EXPECT_EQ(absl::UnparseFlag(value), "123456789");
-  value = -987654321L;
-  EXPECT_EQ(absl::UnparseFlag(value), "-987654321");
-  value = 0x7FFFFFFFFFFFFFFF;
-  EXPECT_EQ(absl::UnparseFlag(value), "9223372036854775807");
-  value = 0xFFFFFFFFFFFFFFFF;
-  EXPECT_EQ(absl::UnparseFlag(value), "-1");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestUint64Unparsing) {
-  uint64_t value;
-
-  value = 1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1");
-  value = 0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = 123456789L;
-  EXPECT_EQ(absl::UnparseFlag(value), "123456789");
-  value = 0xFFFFFFFFFFFFFFFF;
-  EXPECT_EQ(absl::UnparseFlag(value), "18446744073709551615");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestFloatUnparsing) {
-  float value;
-
-  value = 1.1f;
-  EXPECT_EQ(absl::UnparseFlag(value), "1.1");
-  value = 0.01f;
-  EXPECT_EQ(absl::UnparseFlag(value), "0.01");
-  value = 1.23e-2f;
-  EXPECT_EQ(absl::UnparseFlag(value), "0.0123");
-  value = -0.71f;
-  EXPECT_EQ(absl::UnparseFlag(value), "-0.71");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestDoubleUnparsing) {
-  double value;
-
-  value = 1.1;
-  EXPECT_EQ(absl::UnparseFlag(value), "1.1");
-  value = 0.01;
-  EXPECT_EQ(absl::UnparseFlag(value), "0.01");
-  value = 1.23e-2;
-  EXPECT_EQ(absl::UnparseFlag(value), "0.0123");
-  value = -0.71;
-  EXPECT_EQ(absl::UnparseFlag(value), "-0.71");
-  value = -0;
-  EXPECT_EQ(absl::UnparseFlag(value), "0");
-  value = std::nan("");
-  EXPECT_EQ(absl::UnparseFlag(value), "nan");
-  value = std::numeric_limits<double>::infinity();
-  EXPECT_EQ(absl::UnparseFlag(value), "inf");
-}
-
-// --------------------------------------------------------------------
-
-TEST(MarshallingTest, TestStringUnparsing) {
-  EXPECT_EQ(absl::UnparseFlag(""), "");
-  EXPECT_EQ(absl::UnparseFlag(" "), " ");
-  EXPECT_EQ(absl::UnparseFlag("qwerty"), "qwerty");
-  EXPECT_EQ(absl::UnparseFlag("ASDFGH"), "ASDFGH");
-  EXPECT_EQ(absl::UnparseFlag("\n\t  "), "\n\t  ");
-}
-
-// --------------------------------------------------------------------
-
-template <typename T>
-void TestRoundtrip(T v) {
-  T new_v;
-  std::string err;
-  EXPECT_TRUE(absl::ParseFlag(absl::UnparseFlag(v), &new_v, &err));
-  EXPECT_EQ(new_v, v);
-}
-
-TEST(MarshallingTest, TestFloatRoundTrip) {
-  TestRoundtrip(0.1f);
-  TestRoundtrip(0.12f);
-  TestRoundtrip(0.123f);
-  TestRoundtrip(0.1234f);
-  TestRoundtrip(0.12345f);
-  TestRoundtrip(0.123456f);
-  TestRoundtrip(0.1234567f);
-  TestRoundtrip(0.12345678f);
-
-  TestRoundtrip(0.1e20f);
-  TestRoundtrip(0.12e20f);
-  TestRoundtrip(0.123e20f);
-  TestRoundtrip(0.1234e20f);
-  TestRoundtrip(0.12345e20f);
-  TestRoundtrip(0.123456e20f);
-  TestRoundtrip(0.1234567e20f);
-  TestRoundtrip(0.12345678e20f);
-
-  TestRoundtrip(0.1e-20f);
-  TestRoundtrip(0.12e-20f);
-  TestRoundtrip(0.123e-20f);
-  TestRoundtrip(0.1234e-20f);
-  TestRoundtrip(0.12345e-20f);
-  TestRoundtrip(0.123456e-20f);
-  TestRoundtrip(0.1234567e-20f);
-  TestRoundtrip(0.12345678e-20f);
-}
-
-TEST(MarshallingTest, TestDoubleRoundTrip) {
-  TestRoundtrip(0.1);
-  TestRoundtrip(0.12);
-  TestRoundtrip(0.123);
-  TestRoundtrip(0.1234);
-  TestRoundtrip(0.12345);
-  TestRoundtrip(0.123456);
-  TestRoundtrip(0.1234567);
-  TestRoundtrip(0.12345678);
-  TestRoundtrip(0.123456789);
-  TestRoundtrip(0.1234567891);
-  TestRoundtrip(0.12345678912);
-  TestRoundtrip(0.123456789123);
-  TestRoundtrip(0.1234567891234);
-  TestRoundtrip(0.12345678912345);
-  TestRoundtrip(0.123456789123456);
-  TestRoundtrip(0.1234567891234567);
-  TestRoundtrip(0.12345678912345678);
-
-  TestRoundtrip(0.1e50);
-  TestRoundtrip(0.12e50);
-  TestRoundtrip(0.123e50);
-  TestRoundtrip(0.1234e50);
-  TestRoundtrip(0.12345e50);
-  TestRoundtrip(0.123456e50);
-  TestRoundtrip(0.1234567e50);
-  TestRoundtrip(0.12345678e50);
-  TestRoundtrip(0.123456789e50);
-  TestRoundtrip(0.1234567891e50);
-  TestRoundtrip(0.12345678912e50);
-  TestRoundtrip(0.123456789123e50);
-  TestRoundtrip(0.1234567891234e50);
-  TestRoundtrip(0.12345678912345e50);
-  TestRoundtrip(0.123456789123456e50);
-  TestRoundtrip(0.1234567891234567e50);
-  TestRoundtrip(0.12345678912345678e50);
-
-  TestRoundtrip(0.1e-50);
-  TestRoundtrip(0.12e-50);
-  TestRoundtrip(0.123e-50);
-  TestRoundtrip(0.1234e-50);
-  TestRoundtrip(0.12345e-50);
-  TestRoundtrip(0.123456e-50);
-  TestRoundtrip(0.1234567e-50);
-  TestRoundtrip(0.12345678e-50);
-  TestRoundtrip(0.123456789e-50);
-  TestRoundtrip(0.1234567891e-50);
-  TestRoundtrip(0.12345678912e-50);
-  TestRoundtrip(0.123456789123e-50);
-  TestRoundtrip(0.1234567891234e-50);
-  TestRoundtrip(0.12345678912345e-50);
-  TestRoundtrip(0.123456789123456e-50);
-  TestRoundtrip(0.1234567891234567e-50);
-  TestRoundtrip(0.12345678912345678e-50);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/parse.cc b/third_party/abseil/absl/flags/parse.cc
deleted file mode 100644
index dd1a679..0000000
--- a/third_party/abseil/absl/flags/parse.cc
+++ /dev/null
@@ -1,823 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/parse.h"
-
-#include <stdlib.h>
-
-#include <algorithm>
-#include <fstream>
-#include <iostream>
-#include <iterator>
-#include <string>
-#include <tuple>
-#include <utility>
-#include <vector>
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/const_init.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/config.h"
-#include "absl/flags/flag.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/flags/internal/flag.h"
-#include "absl/flags/internal/parse.h"
-#include "absl/flags/internal/private_handle_accessor.h"
-#include "absl/flags/internal/program_name.h"
-#include "absl/flags/internal/usage.h"
-#include "absl/flags/reflection.h"
-#include "absl/flags/usage.h"
-#include "absl/flags/usage_config.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-#include "absl/synchronization/mutex.h"
-
-// --------------------------------------------------------------------
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-namespace {
-
-ABSL_CONST_INIT absl::Mutex processing_checks_guard(absl::kConstInit);
-
-ABSL_CONST_INIT bool flagfile_needs_processing
-    ABSL_GUARDED_BY(processing_checks_guard) = false;
-ABSL_CONST_INIT bool fromenv_needs_processing
-    ABSL_GUARDED_BY(processing_checks_guard) = false;
-ABSL_CONST_INIT bool tryfromenv_needs_processing
-    ABSL_GUARDED_BY(processing_checks_guard) = false;
-
-ABSL_CONST_INIT absl::Mutex specified_flags_guard(absl::kConstInit);
-ABSL_CONST_INIT std::vector<const CommandLineFlag*>* specified_flags
-    ABSL_GUARDED_BY(specified_flags_guard) = nullptr;
-
-struct SpecifiedFlagsCompare {
-  bool operator()(const CommandLineFlag* a, const CommandLineFlag* b) const {
-    return a->Name() < b->Name();
-  }
-  bool operator()(const CommandLineFlag* a, absl::string_view b) const {
-    return a->Name() < b;
-  }
-  bool operator()(absl::string_view a, const CommandLineFlag* b) const {
-    return a < b->Name();
-  }
-};
-
-}  // namespace
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-ABSL_FLAG(std::vector<std::string>, flagfile, {},
-          "comma-separated list of files to load flags from")
-    .OnUpdate([]() {
-      if (absl::GetFlag(FLAGS_flagfile).empty()) return;
-
-      absl::MutexLock l(&absl::flags_internal::processing_checks_guard);
-
-      // Setting this flag twice before it is handled most likely an internal
-      // error and should be reviewed by developers.
-      if (absl::flags_internal::flagfile_needs_processing) {
-        ABSL_INTERNAL_LOG(WARNING, "flagfile set twice before it is handled");
-      }
-
-      absl::flags_internal::flagfile_needs_processing = true;
-    });
-ABSL_FLAG(std::vector<std::string>, fromenv, {},
-          "comma-separated list of flags to set from the environment"
-          " [use 'export FLAGS_flag1=value']")
-    .OnUpdate([]() {
-      if (absl::GetFlag(FLAGS_fromenv).empty()) return;
-
-      absl::MutexLock l(&absl::flags_internal::processing_checks_guard);
-
-      // Setting this flag twice before it is handled most likely an internal
-      // error and should be reviewed by developers.
-      if (absl::flags_internal::fromenv_needs_processing) {
-        ABSL_INTERNAL_LOG(WARNING, "fromenv set twice before it is handled.");
-      }
-
-      absl::flags_internal::fromenv_needs_processing = true;
-    });
-ABSL_FLAG(std::vector<std::string>, tryfromenv, {},
-          "comma-separated list of flags to try to set from the environment if "
-          "present")
-    .OnUpdate([]() {
-      if (absl::GetFlag(FLAGS_tryfromenv).empty()) return;
-
-      absl::MutexLock l(&absl::flags_internal::processing_checks_guard);
-
-      // Setting this flag twice before it is handled most likely an internal
-      // error and should be reviewed by developers.
-      if (absl::flags_internal::tryfromenv_needs_processing) {
-        ABSL_INTERNAL_LOG(WARNING,
-                          "tryfromenv set twice before it is handled.");
-      }
-
-      absl::flags_internal::tryfromenv_needs_processing = true;
-    });
-
-ABSL_FLAG(std::vector<std::string>, undefok, {},
-          "comma-separated list of flag names that it is okay to specify "
-          "on the command line even if the program does not define a flag "
-          "with that name");
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-namespace {
-
-class ArgsList {
- public:
-  ArgsList() : next_arg_(0) {}
-  ArgsList(int argc, char* argv[]) : args_(argv, argv + argc), next_arg_(0) {}
-  explicit ArgsList(const std::vector<std::string>& args)
-      : args_(args), next_arg_(0) {}
-
-  // Returns success status: true if parsing successful, false otherwise.
-  bool ReadFromFlagfile(const std::string& flag_file_name);
-
-  int Size() const { return args_.size() - next_arg_; }
-  int FrontIndex() const { return next_arg_; }
-  absl::string_view Front() const { return args_[next_arg_]; }
-  void PopFront() { next_arg_++; }
-
- private:
-  std::vector<std::string> args_;
-  int next_arg_;
-};
-
-bool ArgsList::ReadFromFlagfile(const std::string& flag_file_name) {
-  std::ifstream flag_file(flag_file_name);
-
-  if (!flag_file) {
-    flags_internal::ReportUsageError(
-        absl::StrCat("Can't open flagfile ", flag_file_name), true);
-
-    return false;
-  }
-
-  // This argument represents fake argv[0], which should be present in all arg
-  // lists.
-  args_.push_back("");
-
-  std::string line;
-  bool success = true;
-
-  while (std::getline(flag_file, line)) {
-    absl::string_view stripped = absl::StripLeadingAsciiWhitespace(line);
-
-    if (stripped.empty() || stripped[0] == '#') {
-      // Comment or empty line; just ignore.
-      continue;
-    }
-
-    if (stripped[0] == '-') {
-      if (stripped == "--") {
-        flags_internal::ReportUsageError(
-            "Flagfile can't contain position arguments or --", true);
-
-        success = false;
-        break;
-      }
-
-      args_.push_back(std::string(stripped));
-      continue;
-    }
-
-    flags_internal::ReportUsageError(
-        absl::StrCat("Unexpected line in the flagfile ", flag_file_name, ": ",
-                     line),
-        true);
-
-    success = false;
-  }
-
-  return success;
-}
-
-// --------------------------------------------------------------------
-
-// Reads the environment variable with name `name` and stores results in
-// `value`. If variable is not present in environment returns false, otherwise
-// returns true.
-bool GetEnvVar(const char* var_name, std::string& var_value) {
-#ifdef _WIN32
-  char buf[1024];
-  auto get_res = GetEnvironmentVariableA(var_name, buf, sizeof(buf));
-  if (get_res >= sizeof(buf)) {
-    return false;
-  }
-
-  if (get_res == 0) {
-    return false;
-  }
-
-  var_value = std::string(buf, get_res);
-#else
-  const char* val = ::getenv(var_name);
-  if (val == nullptr) {
-    return false;
-  }
-
-  var_value = val;
-#endif
-
-  return true;
-}
-
-// --------------------------------------------------------------------
-
-// Returns:
-//  Flag name or empty if arg= --
-//  Flag value after = in --flag=value (empty if --foo)
-//  "Is empty value" status. True if arg= --foo=, false otherwise. This is
-//  required to separate --foo from --foo=.
-// For example:
-//      arg           return values
-//   "--foo=bar" -> {"foo", "bar", false}.
-//   "--foo"     -> {"foo", "", false}.
-//   "--foo="    -> {"foo", "", true}.
-std::tuple<absl::string_view, absl::string_view, bool> SplitNameAndValue(
-    absl::string_view arg) {
-  // Allow -foo and --foo
-  absl::ConsumePrefix(&arg, "-");
-
-  if (arg.empty()) {
-    return std::make_tuple("", "", false);
-  }
-
-  auto equal_sign_pos = arg.find("=");
-
-  absl::string_view flag_name = arg.substr(0, equal_sign_pos);
-
-  absl::string_view value;
-  bool is_empty_value = false;
-
-  if (equal_sign_pos != absl::string_view::npos) {
-    value = arg.substr(equal_sign_pos + 1);
-    is_empty_value = value.empty();
-  }
-
-  return std::make_tuple(flag_name, value, is_empty_value);
-}
-
-// --------------------------------------------------------------------
-
-// Returns:
-//  found flag or nullptr
-//  is negative in case of --nofoo
-std::tuple<CommandLineFlag*, bool> LocateFlag(absl::string_view flag_name) {
-  CommandLineFlag* flag = absl::FindCommandLineFlag(flag_name);
-  bool is_negative = false;
-
-  if (!flag && absl::ConsumePrefix(&flag_name, "no")) {
-    flag = absl::FindCommandLineFlag(flag_name);
-    is_negative = true;
-  }
-
-  return std::make_tuple(flag, is_negative);
-}
-
-// --------------------------------------------------------------------
-
-// Verify that default values of typed flags must be convertible to string and
-// back.
-void CheckDefaultValuesParsingRoundtrip() {
-#ifndef NDEBUG
-  flags_internal::ForEachFlag([&](CommandLineFlag& flag) {
-    if (flag.IsRetired()) return;
-
-#define ABSL_FLAGS_INTERNAL_IGNORE_TYPE(T, _) \
-  if (flag.IsOfType<T>()) return;
-
-    ABSL_FLAGS_INTERNAL_SUPPORTED_TYPES(ABSL_FLAGS_INTERNAL_IGNORE_TYPE)
-#undef ABSL_FLAGS_INTERNAL_IGNORE_TYPE
-
-    flags_internal::PrivateHandleAccessor::CheckDefaultValueParsingRoundtrip(
-        flag);
-  });
-#endif
-}
-
-// --------------------------------------------------------------------
-
-// Returns success status, which is true if we successfully read all flag files,
-// in which case new ArgLists are appended to the input_args in a reverse order
-// of file names in the input flagfiles list. This order ensures that flags from
-// the first flagfile in the input list are processed before the second flagfile
-// etc.
-bool ReadFlagfiles(const std::vector<std::string>& flagfiles,
-                   std::vector<ArgsList>& input_args) {
-  bool success = true;
-  for (auto it = flagfiles.rbegin(); it != flagfiles.rend(); ++it) {
-    ArgsList al;
-
-    if (al.ReadFromFlagfile(*it)) {
-      input_args.push_back(al);
-    } else {
-      success = false;
-    }
-  }
-
-  return success;
-}
-
-// Returns success status, which is true if were able to locate all environment
-// variables correctly or if fail_on_absent_in_env is false. The environment
-// variable names are expected to be of the form `FLAGS_<flag_name>`, where
-// `flag_name` is a string from the input flag_names list. If successful we
-// append a single ArgList at the end of the input_args.
-bool ReadFlagsFromEnv(const std::vector<std::string>& flag_names,
-                      std::vector<ArgsList>& input_args,
-                      bool fail_on_absent_in_env) {
-  bool success = true;
-  std::vector<std::string> args;
-
-  // This argument represents fake argv[0], which should be present in all arg
-  // lists.
-  args.push_back("");
-
-  for (const auto& flag_name : flag_names) {
-    // Avoid infinite recursion.
-    if (flag_name == "fromenv" || flag_name == "tryfromenv") {
-      flags_internal::ReportUsageError(
-          absl::StrCat("Infinite recursion on flag ", flag_name), true);
-
-      success = false;
-      continue;
-    }
-
-    const std::string envname = absl::StrCat("FLAGS_", flag_name);
-    std::string envval;
-    if (!GetEnvVar(envname.c_str(), envval)) {
-      if (fail_on_absent_in_env) {
-        flags_internal::ReportUsageError(
-            absl::StrCat(envname, " not found in environment"), true);
-
-        success = false;
-      }
-
-      continue;
-    }
-
-    args.push_back(absl::StrCat("--", flag_name, "=", envval));
-  }
-
-  if (success) {
-    input_args.emplace_back(args);
-  }
-
-  return success;
-}
-
-// --------------------------------------------------------------------
-
-// Returns success status, which is true if were able to handle all generator
-// flags (flagfile, fromenv, tryfromemv) successfully.
-bool HandleGeneratorFlags(std::vector<ArgsList>& input_args,
-                          std::vector<std::string>& flagfile_value) {
-  bool success = true;
-
-  absl::MutexLock l(&flags_internal::processing_checks_guard);
-
-  // flagfile could have been set either on a command line or
-  // programmatically before invoking ParseCommandLine. Note that we do not
-  // actually process arguments specified in the flagfile, but instead
-  // create a secondary arguments list to be processed along with the rest
-  // of the comamnd line arguments. Since we always the process most recently
-  // created list of arguments first, this will result in flagfile argument
-  // being processed before any other argument in the command line. If
-  // FLAGS_flagfile contains more than one file name we create multiple new
-  // levels of arguments in a reverse order of file names. Thus we always
-  // process arguments from first file before arguments containing in a
-  // second file, etc. If flagfile contains another
-  // --flagfile inside of it, it will produce new level of arguments and
-  // processed before the rest of the flagfile. We are also collecting all
-  // flagfiles set on original command line. Unlike the rest of the flags,
-  // this flag can be set multiple times and is expected to be handled
-  // multiple times. We are collecting them all into a single list and set
-  // the value of FLAGS_flagfile to that value at the end of the parsing.
-  if (flags_internal::flagfile_needs_processing) {
-    auto flagfiles = absl::GetFlag(FLAGS_flagfile);
-
-    if (input_args.size() == 1) {
-      flagfile_value.insert(flagfile_value.end(), flagfiles.begin(),
-                            flagfiles.end());
-    }
-
-    success &= ReadFlagfiles(flagfiles, input_args);
-
-    flags_internal::flagfile_needs_processing = false;
-  }
-
-  // Similar to flagfile fromenv/tryfromemv can be set both
-  // programmatically and at runtime on a command line. Unlike flagfile these
-  // can't be recursive.
-  if (flags_internal::fromenv_needs_processing) {
-    auto flags_list = absl::GetFlag(FLAGS_fromenv);
-
-    success &= ReadFlagsFromEnv(flags_list, input_args, true);
-
-    flags_internal::fromenv_needs_processing = false;
-  }
-
-  if (flags_internal::tryfromenv_needs_processing) {
-    auto flags_list = absl::GetFlag(FLAGS_tryfromenv);
-
-    success &= ReadFlagsFromEnv(flags_list, input_args, false);
-
-    flags_internal::tryfromenv_needs_processing = false;
-  }
-
-  return success;
-}
-
-// --------------------------------------------------------------------
-
-void ResetGeneratorFlags(const std::vector<std::string>& flagfile_value) {
-  // Setting flagfile to the value which collates all the values set on a
-  // command line and programmatically. So if command line looked like
-  // --flagfile=f1 --flagfile=f2 the final value of the FLAGS_flagfile flag is
-  // going to be {"f1", "f2"}
-  if (!flagfile_value.empty()) {
-    absl::SetFlag(&FLAGS_flagfile, flagfile_value);
-    absl::MutexLock l(&flags_internal::processing_checks_guard);
-    flags_internal::flagfile_needs_processing = false;
-  }
-
-  // fromenv/tryfromenv are set to <undefined> value.
-  if (!absl::GetFlag(FLAGS_fromenv).empty()) {
-    absl::SetFlag(&FLAGS_fromenv, {});
-  }
-  if (!absl::GetFlag(FLAGS_tryfromenv).empty()) {
-    absl::SetFlag(&FLAGS_tryfromenv, {});
-  }
-
-  absl::MutexLock l(&flags_internal::processing_checks_guard);
-  flags_internal::fromenv_needs_processing = false;
-  flags_internal::tryfromenv_needs_processing = false;
-}
-
-// --------------------------------------------------------------------
-
-// Returns:
-//  success status
-//  deduced value
-// We are also mutating curr_list in case if we need to get a hold of next
-// argument in the input.
-std::tuple<bool, absl::string_view> DeduceFlagValue(const CommandLineFlag& flag,
-                                                    absl::string_view value,
-                                                    bool is_negative,
-                                                    bool is_empty_value,
-                                                    ArgsList* curr_list) {
-  // Value is either an argument suffix after `=` in "--foo=<value>"
-  // or separate argument in case of "--foo" "<value>".
-
-  // boolean flags have these forms:
-  //   --foo
-  //   --nofoo
-  //   --foo=true
-  //   --foo=false
-  //   --nofoo=<value> is not supported
-  //   --foo <value> is not supported
-
-  // non boolean flags have these forms:
-  // --foo=<value>
-  // --foo <value>
-  // --nofoo is not supported
-
-  if (flag.IsOfType<bool>()) {
-    if (value.empty()) {
-      if (is_empty_value) {
-        // "--bool_flag=" case
-        flags_internal::ReportUsageError(
-            absl::StrCat(
-                "Missing the value after assignment for the boolean flag '",
-                flag.Name(), "'"),
-            true);
-        return std::make_tuple(false, "");
-      }
-
-      // "--bool_flag" case
-      value = is_negative ? "0" : "1";
-    } else if (is_negative) {
-      // "--nobool_flag=Y" case
-      flags_internal::ReportUsageError(
-          absl::StrCat("Negative form with assignment is not valid for the "
-                       "boolean flag '",
-                       flag.Name(), "'"),
-          true);
-      return std::make_tuple(false, "");
-    }
-  } else if (is_negative) {
-    // "--noint_flag=1" case
-    flags_internal::ReportUsageError(
-        absl::StrCat("Negative form is not valid for the flag '", flag.Name(),
-                     "'"),
-        true);
-    return std::make_tuple(false, "");
-  } else if (value.empty() && (!is_empty_value)) {
-    if (curr_list->Size() == 1) {
-      // "--int_flag" case
-      flags_internal::ReportUsageError(
-          absl::StrCat("Missing the value for the flag '", flag.Name(), "'"),
-          true);
-      return std::make_tuple(false, "");
-    }
-
-    // "--int_flag" "10" case
-    curr_list->PopFront();
-    value = curr_list->Front();
-
-    // Heuristic to detect the case where someone treats a string arg
-    // like a bool or just forgets to pass a value:
-    // --my_string_var --foo=bar
-    // We look for a flag of string type, whose value begins with a
-    // dash and corresponds to known flag or standalone --.
-    if (!value.empty() && value[0] == '-' && flag.IsOfType<std::string>()) {
-      auto maybe_flag_name = std::get<0>(SplitNameAndValue(value.substr(1)));
-
-      if (maybe_flag_name.empty() ||
-          std::get<0>(LocateFlag(maybe_flag_name)) != nullptr) {
-        // "--string_flag" "--known_flag" case
-        ABSL_INTERNAL_LOG(
-            WARNING,
-            absl::StrCat("Did you really mean to set flag '", flag.Name(),
-                         "' to the value '", value, "'?"));
-      }
-    }
-  }
-
-  return std::make_tuple(true, value);
-}
-
-// --------------------------------------------------------------------
-
-bool CanIgnoreUndefinedFlag(absl::string_view flag_name) {
-  auto undefok = absl::GetFlag(FLAGS_undefok);
-  if (std::find(undefok.begin(), undefok.end(), flag_name) != undefok.end()) {
-    return true;
-  }
-
-  if (absl::ConsumePrefix(&flag_name, "no") &&
-      std::find(undefok.begin(), undefok.end(), flag_name) != undefok.end()) {
-    return true;
-  }
-
-  return false;
-}
-
-}  // namespace
-
-// --------------------------------------------------------------------
-
-bool WasPresentOnCommandLine(absl::string_view flag_name) {
-  absl::MutexLock l(&specified_flags_guard);
-  ABSL_INTERNAL_CHECK(specified_flags != nullptr,
-                      "ParseCommandLine is not invoked yet");
-
-  return std::binary_search(specified_flags->begin(), specified_flags->end(),
-                            flag_name, SpecifiedFlagsCompare{});
-}
-
-// --------------------------------------------------------------------
-
-std::vector<char*> ParseCommandLineImpl(int argc, char* argv[],
-                                        ArgvListAction arg_list_act,
-                                        UsageFlagsAction usage_flag_act,
-                                        OnUndefinedFlag on_undef_flag) {
-  ABSL_INTERNAL_CHECK(argc > 0, "Missing argv[0]");
-
-  // Once parsing has started we will not have more flag registrations.
-  // If we did, they would be missing during parsing, which is a problem on
-  // itself.
-  flags_internal::FinalizeRegistry();
-
-  // This routine does not return anything since we abort on failure.
-  CheckDefaultValuesParsingRoundtrip();
-
-  std::vector<std::string> flagfile_value;
-
-  std::vector<ArgsList> input_args;
-  input_args.push_back(ArgsList(argc, argv));
-
-  std::vector<char*> output_args;
-  std::vector<char*> positional_args;
-  output_args.reserve(argc);
-
-  // This is the list of undefined flags. The element of the list is the pair
-  // consisting of boolean indicating if flag came from command line (vs from
-  // some flag file we've read) and flag name.
-  // TODO(rogeeff): Eliminate the first element in the pair after cleanup.
-  std::vector<std::pair<bool, std::string>> undefined_flag_names;
-
-  // Set program invocation name if it is not set before.
-  if (ProgramInvocationName() == "UNKNOWN") {
-    flags_internal::SetProgramInvocationName(argv[0]);
-  }
-  output_args.push_back(argv[0]);
-
-  absl::MutexLock l(&specified_flags_guard);
-  if (specified_flags == nullptr) {
-    specified_flags = new std::vector<const CommandLineFlag*>;
-  } else {
-    specified_flags->clear();
-  }
-
-  // Iterate through the list of the input arguments. First level are arguments
-  // originated from argc/argv. Following levels are arguments originated from
-  // recursive parsing of flagfile(s).
-  bool success = true;
-  while (!input_args.empty()) {
-    // 10. First we process the built-in generator flags.
-    success &= HandleGeneratorFlags(input_args, flagfile_value);
-
-    // 30. Select top-most (most recent) arguments list. If it is empty drop it
-    // and re-try.
-    ArgsList& curr_list = input_args.back();
-
-    curr_list.PopFront();
-
-    if (curr_list.Size() == 0) {
-      input_args.pop_back();
-      continue;
-    }
-
-    // 40. Pick up the front remaining argument in the current list. If current
-    // stack of argument lists contains only one element - we are processing an
-    // argument from the original argv.
-    absl::string_view arg(curr_list.Front());
-    bool arg_from_argv = input_args.size() == 1;
-
-    // 50. If argument does not start with - or is just "-" - this is
-    // positional argument.
-    if (!absl::ConsumePrefix(&arg, "-") || arg.empty()) {
-      ABSL_INTERNAL_CHECK(arg_from_argv,
-                          "Flagfile cannot contain positional argument");
-
-      positional_args.push_back(argv[curr_list.FrontIndex()]);
-      continue;
-    }
-
-    if (arg_from_argv && (arg_list_act == ArgvListAction::kKeepParsedArgs)) {
-      output_args.push_back(argv[curr_list.FrontIndex()]);
-    }
-
-    // 60. Split the current argument on '=' to figure out the argument
-    // name and value. If flag name is empty it means we've got "--". value
-    // can be empty either if there were no '=' in argument string at all or
-    // an argument looked like "--foo=". In a latter case is_empty_value is
-    // true.
-    absl::string_view flag_name;
-    absl::string_view value;
-    bool is_empty_value = false;
-
-    std::tie(flag_name, value, is_empty_value) = SplitNameAndValue(arg);
-
-    // 70. "--" alone means what it does for GNU: stop flags parsing. We do
-    // not support positional arguments in flagfiles, so we just drop them.
-    if (flag_name.empty()) {
-      ABSL_INTERNAL_CHECK(arg_from_argv,
-                          "Flagfile cannot contain positional argument");
-
-      curr_list.PopFront();
-      break;
-    }
-
-    // 80. Locate the flag based on flag name. Handle both --foo and --nofoo
-    CommandLineFlag* flag = nullptr;
-    bool is_negative = false;
-    std::tie(flag, is_negative) = LocateFlag(flag_name);
-
-    if (flag == nullptr) {
-      // Usage flags are not modeled as Abseil flags. Locate them separately.
-      if (flags_internal::DeduceUsageFlags(flag_name, value)) {
-        continue;
-      }
-
-      if (on_undef_flag != OnUndefinedFlag::kIgnoreUndefined) {
-        undefined_flag_names.emplace_back(arg_from_argv,
-                                          std::string(flag_name));
-      }
-      continue;
-    }
-
-    // 90. Deduce flag's value (from this or next argument)
-    auto curr_index = curr_list.FrontIndex();
-    bool value_success = true;
-    std::tie(value_success, value) =
-        DeduceFlagValue(*flag, value, is_negative, is_empty_value, &curr_list);
-    success &= value_success;
-
-    // If above call consumed an argument, it was a standalone value
-    if (arg_from_argv && (arg_list_act == ArgvListAction::kKeepParsedArgs) &&
-        (curr_index != curr_list.FrontIndex())) {
-      output_args.push_back(argv[curr_list.FrontIndex()]);
-    }
-
-    // 100. Set the located flag to a new new value, unless it is retired.
-    // Setting retired flag fails, but we ignoring it here while also reporting
-    // access to retired flag.
-    std::string error;
-    if (!flags_internal::PrivateHandleAccessor::ParseFrom(
-            *flag, value, SET_FLAGS_VALUE, kCommandLine, error)) {
-      if (flag->IsRetired()) continue;
-
-      flags_internal::ReportUsageError(error, true);
-      success = false;
-    } else {
-      specified_flags->push_back(flag);
-    }
-  }
-
-  for (const auto& flag_name : undefined_flag_names) {
-    if (CanIgnoreUndefinedFlag(flag_name.second)) continue;
-
-    flags_internal::ReportUsageError(
-        absl::StrCat("Unknown command line flag '", flag_name.second, "'"),
-        true);
-
-    success = false;
-  }
-
-#if ABSL_FLAGS_STRIP_NAMES
-  if (!success) {
-    flags_internal::ReportUsageError(
-        "NOTE: command line flags are disabled in this build", true);
-  }
-#endif
-
-  if (!success) {
-    flags_internal::HandleUsageFlags(std::cout,
-                                     ProgramUsageMessage());
-    std::exit(1);
-  }
-
-  if (usage_flag_act == UsageFlagsAction::kHandleUsage) {
-    int exit_code = flags_internal::HandleUsageFlags(
-        std::cout, ProgramUsageMessage());
-
-    if (exit_code != -1) {
-      std::exit(exit_code);
-    }
-  }
-
-  ResetGeneratorFlags(flagfile_value);
-
-  // Reinstate positional args which were intermixed with flags in the arguments
-  // list.
-  for (auto arg : positional_args) {
-    output_args.push_back(arg);
-  }
-
-  // All the remaining arguments are positional.
-  if (!input_args.empty()) {
-    for (int arg_index = input_args.back().FrontIndex(); arg_index < argc;
-         ++arg_index) {
-      output_args.push_back(argv[arg_index]);
-    }
-  }
-
-  // Trim and sort the vector.
-  specified_flags->shrink_to_fit();
-  std::sort(specified_flags->begin(), specified_flags->end(),
-            SpecifiedFlagsCompare{});
-  return output_args;
-}
-
-}  // namespace flags_internal
-
-// --------------------------------------------------------------------
-
-std::vector<char*> ParseCommandLine(int argc, char* argv[]) {
-  return flags_internal::ParseCommandLineImpl(
-      argc, argv, flags_internal::ArgvListAction::kRemoveParsedArgs,
-      flags_internal::UsageFlagsAction::kHandleUsage,
-      flags_internal::OnUndefinedFlag::kAbortIfUndefined);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/parse.h b/third_party/abseil/absl/flags/parse.h
deleted file mode 100644
index 929de2c..0000000
--- a/third_party/abseil/absl/flags/parse.h
+++ /dev/null
@@ -1,60 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: parse.h
-// -----------------------------------------------------------------------------
-//
-// This file defines the main parsing function for Abseil flags:
-// `absl::ParseCommandLine()`.
-
-#ifndef ABSL_FLAGS_PARSE_H_
-#define ABSL_FLAGS_PARSE_H_
-
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/flags/internal/parse.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// ParseCommandLine()
-//
-// Parses the set of command-line arguments passed in the `argc` (argument
-// count) and `argv[]` (argument vector) parameters from `main()`, assigning
-// values to any defined Abseil flags. (Any arguments passed after the
-// flag-terminating delimiter (`--`) are treated as positional arguments and
-// ignored.)
-//
-// Any command-line flags (and arguments to those flags) are parsed into Abseil
-// Flag values, if those flags are defined. Any undefined flags will either
-// return an error, or be ignored if that flag is designated using `undefok` to
-// indicate "undefined is OK."
-//
-// Any command-line positional arguments not part of any command-line flag (or
-// arguments to a flag) are returned in a vector, with the program invocation
-// name at position 0 of that vector. (Note that this includes positional
-// arguments after the flag-terminating delimiter `--`.)
-//
-// After all flags and flag arguments are parsed, this function looks for any
-// built-in usage flags (e.g. `--help`), and if any were specified, it reports
-// help messages and then exits the program.
-std::vector<char*> ParseCommandLine(int argc, char* argv[]);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_PARSE_H_
diff --git a/third_party/abseil/absl/flags/parse_test.cc b/third_party/abseil/absl/flags/parse_test.cc
deleted file mode 100644
index 41bc0bc..0000000
--- a/third_party/abseil/absl/flags/parse_test.cc
+++ /dev/null
@@ -1,929 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/parse.h"
-
-#include <stdlib.h>
-
-#include <fstream>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/scoped_set_env.h"
-#include "absl/flags/declare.h"
-#include "absl/flags/flag.h"
-#include "absl/flags/internal/parse.h"
-#include "absl/flags/internal/usage.h"
-#include "absl/flags/reflection.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/substitute.h"
-#include "absl/types/span.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-namespace {
-
-using absl::base_internal::ScopedSetEnv;
-
-struct UDT {
-  UDT() = default;
-  UDT(const UDT&) = default;
-  UDT(int v) : value(v) {}  // NOLINT
-
-  int value;
-};
-
-bool AbslParseFlag(absl::string_view in, UDT* udt, std::string* err) {
-  if (in == "A") {
-    udt->value = 1;
-    return true;
-  }
-  if (in == "AAA") {
-    udt->value = 10;
-    return true;
-  }
-
-  *err = "Use values A, AAA instead";
-  return false;
-}
-std::string AbslUnparseFlag(const UDT& udt) {
-  return udt.value == 1 ? "A" : "AAA";
-}
-
-std::string GetTestTmpDirEnvVar(const char* const env_var_name) {
-#ifdef _WIN32
-  char buf[MAX_PATH];
-  auto get_res = GetEnvironmentVariableA(env_var_name, buf, sizeof(buf));
-  if (get_res >= sizeof(buf) || get_res == 0) {
-    return "";
-  }
-
-  return std::string(buf, get_res);
-#else
-  const char* val = ::getenv(env_var_name);
-  if (val == nullptr) {
-    return "";
-  }
-
-  return val;
-#endif
-}
-
-const std::string& GetTestTempDir() {
-  static std::string* temp_dir_name = []() -> std::string* {
-    std::string* res = new std::string(GetTestTmpDirEnvVar("TEST_TMPDIR"));
-
-    if (res->empty()) {
-      *res = GetTestTmpDirEnvVar("TMPDIR");
-    }
-
-    if (res->empty()) {
-#ifdef _WIN32
-      char temp_path_buffer[MAX_PATH];
-
-      auto len = GetTempPathA(MAX_PATH, temp_path_buffer);
-      if (len < MAX_PATH && len != 0) {
-        std::string temp_dir_name = temp_path_buffer;
-        if (!absl::EndsWith(temp_dir_name, "\\")) {
-          temp_dir_name.push_back('\\');
-        }
-        absl::StrAppend(&temp_dir_name, "parse_test.", GetCurrentProcessId());
-        if (CreateDirectoryA(temp_dir_name.c_str(), nullptr)) {
-          *res = temp_dir_name;
-        }
-      }
-#else
-      char temp_dir_template[] = "/tmp/parse_test.XXXXXX";
-      if (auto* unique_name = ::mkdtemp(temp_dir_template)) {
-        *res = unique_name;
-      }
-#endif
-    }
-
-    if (res->empty()) {
-      ABSL_INTERNAL_LOG(FATAL,
-                        "Failed to make temporary directory for data files");
-    }
-
-#ifdef _WIN32
-    *res += "\\";
-#else
-    *res += "/";
-#endif
-
-    return res;
-  }();
-
-  return *temp_dir_name;
-}
-
-struct FlagfileData {
-  const absl::string_view file_name;
-  const absl::Span<const char* const> file_lines;
-};
-
-// clang-format off
-constexpr const char* const ff1_data[] = {
-    "# comment    ",
-    "  # comment  ",
-    "",
-    "     ",
-    "--int_flag=-1",
-    "  --string_flag=q2w2  ",
-    "  ##   ",
-    "  --double_flag=0.1",
-    "--bool_flag=Y  "
-};
-
-constexpr const char* const ff2_data[] = {
-    "# Setting legacy flag",
-    "--legacy_int=1111",
-    "--legacy_bool",
-    "--nobool_flag",
-    "--legacy_str=aqsw",
-    "--int_flag=100",
-    "   ## ============="
-};
-// clang-format on
-
-// Builds flagfile flag in the flagfile_flag buffer and returns it. This
-// function also creates a temporary flagfile based on FlagfileData input.
-// We create a flagfile in a temporary directory with the name specified in
-// FlagfileData and populate it with lines specifed in FlagfileData. If $0 is
-// referenced in any of the lines in FlagfileData they are replaced with
-// temporary directory location. This way we can test inclusion of one flagfile
-// from another flagfile.
-const char* GetFlagfileFlag(const std::vector<FlagfileData>& ffd,
-                            std::string& flagfile_flag) {
-  flagfile_flag = "--flagfile=";
-  absl::string_view separator;
-  for (const auto& flagfile_data : ffd) {
-    std::string flagfile_name =
-        absl::StrCat(GetTestTempDir(), flagfile_data.file_name);
-
-    std::ofstream flagfile_out(flagfile_name);
-    for (auto line : flagfile_data.file_lines) {
-      flagfile_out << absl::Substitute(line, GetTestTempDir()) << "\n";
-    }
-
-    absl::StrAppend(&flagfile_flag, separator, flagfile_name);
-    separator = ",";
-  }
-
-  return flagfile_flag.c_str();
-}
-
-}  // namespace
-
-ABSL_FLAG(int, int_flag, 1, "");
-ABSL_FLAG(double, double_flag, 1.1, "");
-ABSL_FLAG(std::string, string_flag, "a", "");
-ABSL_FLAG(bool, bool_flag, false, "");
-ABSL_FLAG(UDT, udt_flag, -1, "");
-ABSL_RETIRED_FLAG(int, legacy_int, 1, "");
-ABSL_RETIRED_FLAG(bool, legacy_bool, false, "");
-ABSL_RETIRED_FLAG(std::string, legacy_str, "l", "");
-
-namespace {
-
-namespace flags = absl::flags_internal;
-using testing::ElementsAreArray;
-
-class ParseTest : public testing::Test {
- public:
-  ~ParseTest() override { flags::SetFlagsHelpMode(flags::HelpMode::kNone); }
-
- private:
-  absl::FlagSaver flag_saver_;
-};
-
-// --------------------------------------------------------------------
-
-template <int N>
-std::vector<char*> InvokeParse(const char* (&in_argv)[N]) {
-  return absl::ParseCommandLine(N, const_cast<char**>(in_argv));
-}
-
-// --------------------------------------------------------------------
-
-template <int N>
-void TestParse(const char* (&in_argv)[N], int int_flag_value,
-               double double_flag_val, absl::string_view string_flag_val,
-               bool bool_flag_val, int exp_position_args = 0) {
-  auto out_args = InvokeParse(in_argv);
-
-  EXPECT_EQ(out_args.size(), 1 + exp_position_args);
-  EXPECT_STREQ(out_args[0], "testbin");
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), int_flag_value);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_double_flag), double_flag_val, 0.0001);
-  EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), string_flag_val);
-  EXPECT_EQ(absl::GetFlag(FLAGS_bool_flag), bool_flag_val);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestEmptyArgv) {
-  const char* in_argv[] = {"testbin"};
-
-  auto out_args = InvokeParse(in_argv);
-
-  EXPECT_EQ(out_args.size(), 1);
-  EXPECT_STREQ(out_args[0], "testbin");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidIntArg) {
-  const char* in_args1[] = {
-      "testbin",
-      "--int_flag=10",
-  };
-  TestParse(in_args1, 10, 1.1, "a", false);
-
-  const char* in_args2[] = {
-      "testbin",
-      "-int_flag=020",
-  };
-  TestParse(in_args2, 20, 1.1, "a", false);
-
-  const char* in_args3[] = {
-      "testbin",
-      "--int_flag",
-      "-30",
-  };
-  TestParse(in_args3, -30, 1.1, "a", false);
-
-  const char* in_args4[] = {
-      "testbin",
-      "-int_flag",
-      "0x21",
-  };
-  TestParse(in_args4, 33, 1.1, "a", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidDoubleArg) {
-  const char* in_args1[] = {
-      "testbin",
-      "--double_flag=2.3",
-  };
-  TestParse(in_args1, 1, 2.3, "a", false);
-
-  const char* in_args2[] = {
-      "testbin",
-      "--double_flag=0x1.2",
-  };
-  TestParse(in_args2, 1, 1.125, "a", false);
-
-  const char* in_args3[] = {
-      "testbin",
-      "--double_flag",
-      "99.7",
-  };
-  TestParse(in_args3, 1, 99.7, "a", false);
-
-  const char* in_args4[] = {
-      "testbin",
-      "--double_flag",
-      "0x20.1",
-  };
-  TestParse(in_args4, 1, 32.0625, "a", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidStringArg) {
-  const char* in_args1[] = {
-      "testbin",
-      "--string_flag=aqswde",
-  };
-  TestParse(in_args1, 1, 1.1, "aqswde", false);
-
-  const char* in_args2[] = {
-      "testbin",
-      "-string_flag=a=b=c",
-  };
-  TestParse(in_args2, 1, 1.1, "a=b=c", false);
-
-  const char* in_args3[] = {
-      "testbin",
-      "--string_flag",
-      "zaxscd",
-  };
-  TestParse(in_args3, 1, 1.1, "zaxscd", false);
-
-  const char* in_args4[] = {
-      "testbin",
-      "-string_flag",
-      "--int_flag",
-  };
-  TestParse(in_args4, 1, 1.1, "--int_flag", false);
-
-  const char* in_args5[] = {
-      "testbin",
-      "--string_flag",
-      "--no_a_flag=11",
-  };
-  TestParse(in_args5, 1, 1.1, "--no_a_flag=11", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidBoolArg) {
-  const char* in_args1[] = {
-      "testbin",
-      "--bool_flag",
-  };
-  TestParse(in_args1, 1, 1.1, "a", true);
-
-  const char* in_args2[] = {
-      "testbin",
-      "--nobool_flag",
-  };
-  TestParse(in_args2, 1, 1.1, "a", false);
-
-  const char* in_args3[] = {
-      "testbin",
-      "--bool_flag=true",
-  };
-  TestParse(in_args3, 1, 1.1, "a", true);
-
-  const char* in_args4[] = {
-      "testbin",
-      "-bool_flag=false",
-  };
-  TestParse(in_args4, 1, 1.1, "a", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidUDTArg) {
-  const char* in_args1[] = {
-      "testbin",
-      "--udt_flag=A",
-  };
-  InvokeParse(in_args1);
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_udt_flag).value, 1);
-
-  const char* in_args2[] = {"testbin", "--udt_flag", "AAA"};
-  InvokeParse(in_args2);
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_udt_flag).value, 10);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidMultipleArg) {
-  const char* in_args1[] = {
-      "testbin",           "--bool_flag",       "--int_flag=2",
-      "--double_flag=0.1", "--string_flag=asd",
-  };
-  TestParse(in_args1, 2, 0.1, "asd", true);
-
-  const char* in_args2[] = {
-      "testbin", "--string_flag=", "--nobool_flag", "--int_flag",
-      "-011",    "--double_flag",  "-1e-2",
-  };
-  TestParse(in_args2, -11, -0.01, "", false);
-
-  const char* in_args3[] = {
-      "testbin",          "--int_flag",         "-0", "--string_flag", "\"\"",
-      "--bool_flag=true", "--double_flag=1e18",
-  };
-  TestParse(in_args3, 0, 1e18, "\"\"", true);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestPositionalArgs) {
-  const char* in_args1[] = {
-      "testbin",
-      "p1",
-      "p2",
-  };
-  TestParse(in_args1, 1, 1.1, "a", false, 2);
-
-  auto out_args1 = InvokeParse(in_args1);
-
-  EXPECT_STREQ(out_args1[1], "p1");
-  EXPECT_STREQ(out_args1[2], "p2");
-
-  const char* in_args2[] = {
-      "testbin",
-      "--int_flag=2",
-      "p1",
-  };
-  TestParse(in_args2, 2, 1.1, "a", false, 1);
-
-  auto out_args2 = InvokeParse(in_args2);
-
-  EXPECT_STREQ(out_args2[1], "p1");
-
-  const char* in_args3[] = {"testbin", "p1",          "--int_flag=3",
-                            "p2",      "--bool_flag", "true"};
-  TestParse(in_args3, 3, 1.1, "a", true, 3);
-
-  auto out_args3 = InvokeParse(in_args3);
-
-  EXPECT_STREQ(out_args3[1], "p1");
-  EXPECT_STREQ(out_args3[2], "p2");
-  EXPECT_STREQ(out_args3[3], "true");
-
-  const char* in_args4[] = {
-      "testbin",
-      "--",
-      "p1",
-      "p2",
-  };
-  TestParse(in_args4, 3, 1.1, "a", true, 2);
-
-  auto out_args4 = InvokeParse(in_args4);
-
-  EXPECT_STREQ(out_args4[1], "p1");
-  EXPECT_STREQ(out_args4[2], "p2");
-
-  const char* in_args5[] = {
-      "testbin", "p1", "--int_flag=4", "--", "--bool_flag", "false", "p2",
-  };
-  TestParse(in_args5, 4, 1.1, "a", true, 4);
-
-  auto out_args5 = InvokeParse(in_args5);
-
-  EXPECT_STREQ(out_args5[1], "p1");
-  EXPECT_STREQ(out_args5[2], "--bool_flag");
-  EXPECT_STREQ(out_args5[3], "false");
-  EXPECT_STREQ(out_args5[4], "p2");
-}
-
-// --------------------------------------------------------------------
-
-using ParseDeathTest = ParseTest;
-
-TEST_F(ParseDeathTest, TestUndefinedArg) {
-  const char* in_args1[] = {
-      "testbin",
-      "--undefined_flag",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
-                            "Unknown command line flag 'undefined_flag'");
-
-  const char* in_args2[] = {
-      "testbin",
-      "--noprefixed_flag",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
-                            "Unknown command line flag 'noprefixed_flag'");
-
-  const char* in_args3[] = {
-      "testbin",
-      "--Int_flag=1",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args3),
-                            "Unknown command line flag 'Int_flag'");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestInvalidBoolFlagFormat) {
-  const char* in_args1[] = {
-      "testbin",
-      "--bool_flag=",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(
-      InvokeParse(in_args1),
-      "Missing the value after assignment for the boolean flag 'bool_flag'");
-
-  const char* in_args2[] = {
-      "testbin",
-      "--nobool_flag=true",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
-               "Negative form with assignment is not valid for the boolean "
-               "flag 'bool_flag'");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestInvalidNonBoolFlagFormat) {
-  const char* in_args1[] = {
-      "testbin",
-      "--nostring_flag",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
-               "Negative form is not valid for the flag 'string_flag'");
-
-  const char* in_args2[] = {
-      "testbin",
-      "--int_flag",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
-               "Missing the value for the flag 'int_flag'");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestInvalidUDTFlagFormat) {
-  const char* in_args1[] = {
-      "testbin",
-      "--udt_flag=1",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
-               "Illegal value '1' specified for flag 'udt_flag'; Use values A, "
-               "AAA instead");
-
-  const char* in_args2[] = {
-      "testbin",
-      "--udt_flag",
-      "AA",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
-               "Illegal value 'AA' specified for flag 'udt_flag'; Use values "
-               "A, AAA instead");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestLegacyFlags) {
-  const char* in_args1[] = {
-      "testbin",
-      "--legacy_int=11",
-  };
-  TestParse(in_args1, 1, 1.1, "a", false);
-
-  const char* in_args2[] = {
-      "testbin",
-      "--legacy_bool",
-  };
-  TestParse(in_args2, 1, 1.1, "a", false);
-
-  const char* in_args3[] = {
-      "testbin",       "--legacy_int", "22",           "--int_flag=2",
-      "--legacy_bool", "true",         "--legacy_str", "--string_flag=qwe",
-  };
-  TestParse(in_args3, 2, 1.1, "a", false, 1);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestSimpleValidFlagfile) {
-  std::string flagfile_flag;
-
-  const char* in_args1[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff1", absl::MakeConstSpan(ff1_data)}},
-                      flagfile_flag),
-  };
-  TestParse(in_args1, -1, 0.1, "q2w2  ", true);
-
-  const char* in_args2[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff2", absl::MakeConstSpan(ff2_data)}},
-                      flagfile_flag),
-  };
-  TestParse(in_args2, 100, 0.1, "q2w2  ", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestValidMultiFlagfile) {
-  std::string flagfile_flag;
-
-  const char* in_args1[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff2", absl::MakeConstSpan(ff2_data)},
-                       {"parse_test.ff1", absl::MakeConstSpan(ff1_data)}},
-                      flagfile_flag),
-  };
-  TestParse(in_args1, -1, 0.1, "q2w2  ", true);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestFlagfileMixedWithRegularFlags) {
-  std::string flagfile_flag;
-
-  const char* in_args1[] = {
-      "testbin", "--int_flag=3",
-      GetFlagfileFlag({{"parse_test.ff1", absl::MakeConstSpan(ff1_data)}},
-                      flagfile_flag),
-      "-double_flag=0.2"};
-  TestParse(in_args1, -1, 0.2, "q2w2  ", true);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestFlagfileInFlagfile) {
-  std::string flagfile_flag;
-
-  constexpr const char* const ff3_data[] = {
-      "--flagfile=$0/parse_test.ff1",
-      "--flagfile=$0/parse_test.ff2",
-  };
-
-  GetFlagfileFlag({{"parse_test.ff2", absl::MakeConstSpan(ff2_data)},
-                   {"parse_test.ff1", absl::MakeConstSpan(ff1_data)}},
-                      flagfile_flag);
-
-  const char* in_args1[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff3", absl::MakeConstSpan(ff3_data)}},
-                      flagfile_flag),
-  };
-  TestParse(in_args1, 100, 0.1, "q2w2  ", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestInvalidFlagfiles) {
-  std::string flagfile_flag;
-
-  constexpr const char* const ff4_data[] = {
-    "--unknown_flag=10"
-  };
-
-  const char* in_args1[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff4",
-                        absl::MakeConstSpan(ff4_data)}}, flagfile_flag),
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
-               "Unknown command line flag 'unknown_flag'");
-
-  constexpr const char* const ff5_data[] = {
-    "--int_flag 10",
-  };
-
-  const char* in_args2[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff5",
-                        absl::MakeConstSpan(ff5_data)}}, flagfile_flag),
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args2),
-               "Unknown command line flag 'int_flag 10'");
-
-  constexpr const char* const ff6_data[] = {
-      "--int_flag=10", "--", "arg1", "arg2", "arg3",
-  };
-
-  const char* in_args3[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff6", absl::MakeConstSpan(ff6_data)}},
-                      flagfile_flag),
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args3),
-               "Flagfile can't contain position arguments or --");
-
-  const char* in_args4[] = {
-      "testbin",
-      "--flagfile=invalid_flag_file",
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args4),
-                            "Can't open flagfile invalid_flag_file");
-
-  constexpr const char* const ff7_data[] = {
-      "--int_flag=10",
-      "*bin*",
-      "--str_flag=aqsw",
-  };
-
-  const char* in_args5[] = {
-      "testbin",
-      GetFlagfileFlag({{"parse_test.ff7", absl::MakeConstSpan(ff7_data)}},
-                      flagfile_flag),
-  };
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args5),
-               "Unexpected line in the flagfile .*: \\*bin\\*");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestReadingRequiredFlagsFromEnv) {
-  const char* in_args1[] = {"testbin",
-                            "--fromenv=int_flag,bool_flag,string_flag"};
-
-  ScopedSetEnv set_int_flag("FLAGS_int_flag", "33");
-  ScopedSetEnv set_bool_flag("FLAGS_bool_flag", "True");
-  ScopedSetEnv set_string_flag("FLAGS_string_flag", "AQ12");
-
-  TestParse(in_args1, 33, 1.1, "AQ12", true);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestReadingUnsetRequiredFlagsFromEnv) {
-  const char* in_args1[] = {"testbin", "--fromenv=int_flag"};
-
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
-               "FLAGS_int_flag not found in environment");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestRecursiveFlagsFromEnv) {
-  const char* in_args1[] = {"testbin", "--fromenv=tryfromenv"};
-
-  ScopedSetEnv set_tryfromenv("FLAGS_tryfromenv", "int_flag");
-
-  EXPECT_DEATH_IF_SUPPORTED(InvokeParse(in_args1),
-                            "Infinite recursion on flag tryfromenv");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestReadingOptionalFlagsFromEnv) {
-  const char* in_args1[] = {
-      "testbin", "--tryfromenv=int_flag,bool_flag,string_flag,other_flag"};
-
-  ScopedSetEnv set_int_flag("FLAGS_int_flag", "17");
-  ScopedSetEnv set_bool_flag("FLAGS_bool_flag", "Y");
-
-  TestParse(in_args1, 17, 1.1, "a", true);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestReadingFlagsFromEnvMoxedWithRegularFlags) {
-  const char* in_args1[] = {
-      "testbin",
-      "--bool_flag=T",
-      "--tryfromenv=int_flag,bool_flag",
-      "--int_flag=-21",
-  };
-
-  ScopedSetEnv set_int_flag("FLAGS_int_flag", "-15");
-  ScopedSetEnv set_bool_flag("FLAGS_bool_flag", "F");
-
-  TestParse(in_args1, -21, 1.1, "a", false);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestKeepParsedArgs) {
-  const char* in_args1[] = {
-      "testbin",        "arg1", "--bool_flag",
-      "--int_flag=211", "arg2", "--double_flag=1.1",
-      "--string_flag",  "asd",  "--",
-      "arg3",           "arg4",
-  };
-
-  auto out_args1 = InvokeParse(in_args1);
-
-  EXPECT_THAT(
-      out_args1,
-      ElementsAreArray({absl::string_view("testbin"), absl::string_view("arg1"),
-                        absl::string_view("arg2"), absl::string_view("arg3"),
-                        absl::string_view("arg4")}));
-
-  auto out_args2 = flags::ParseCommandLineImpl(
-      11, const_cast<char**>(in_args1), flags::ArgvListAction::kKeepParsedArgs,
-      flags::UsageFlagsAction::kHandleUsage,
-      flags::OnUndefinedFlag::kAbortIfUndefined);
-
-  EXPECT_THAT(
-      out_args2,
-      ElementsAreArray({absl::string_view("testbin"),
-                        absl::string_view("--bool_flag"),
-                        absl::string_view("--int_flag=211"),
-                        absl::string_view("--double_flag=1.1"),
-                        absl::string_view("--string_flag"),
-                        absl::string_view("asd"), absl::string_view("--"),
-                        absl::string_view("arg1"), absl::string_view("arg2"),
-                        absl::string_view("arg3"), absl::string_view("arg4")}));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, TestIgnoreUndefinedFlags) {
-  const char* in_args1[] = {
-      "testbin",
-      "arg1",
-      "--undef_flag=aa",
-      "--int_flag=21",
-  };
-
-  auto out_args1 = flags::ParseCommandLineImpl(
-      4, const_cast<char**>(in_args1), flags::ArgvListAction::kRemoveParsedArgs,
-      flags::UsageFlagsAction::kHandleUsage,
-      flags::OnUndefinedFlag::kIgnoreUndefined);
-
-  EXPECT_THAT(out_args1, ElementsAreArray({absl::string_view("testbin"),
-                                           absl::string_view("arg1")}));
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 21);
-
-  const char* in_args2[] = {
-      "testbin",
-      "arg1",
-      "--undef_flag=aa",
-      "--string_flag=AA",
-  };
-
-  auto out_args2 = flags::ParseCommandLineImpl(
-      4, const_cast<char**>(in_args2), flags::ArgvListAction::kKeepParsedArgs,
-      flags::UsageFlagsAction::kHandleUsage,
-      flags::OnUndefinedFlag::kIgnoreUndefined);
-
-  EXPECT_THAT(
-      out_args2,
-      ElementsAreArray(
-          {absl::string_view("testbin"), absl::string_view("--undef_flag=aa"),
-           absl::string_view("--string_flag=AA"), absl::string_view("arg1")}));
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_string_flag), "AA");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestSimpleHelpFlagHandling) {
-  const char* in_args1[] = {
-      "testbin",
-      "--help",
-  };
-
-  EXPECT_EXIT(InvokeParse(in_args1), testing::ExitedWithCode(1), "");
-
-  const char* in_args2[] = {
-      "testbin",
-      "--help",
-      "--int_flag=3",
-  };
-
-  auto out_args2 = flags::ParseCommandLineImpl(
-      3, const_cast<char**>(in_args2), flags::ArgvListAction::kRemoveParsedArgs,
-      flags::UsageFlagsAction::kIgnoreUsage,
-      flags::OnUndefinedFlag::kAbortIfUndefined);
-
-  EXPECT_EQ(flags::GetFlagsHelpMode(), flags::HelpMode::kImportant);
-  EXPECT_EQ(absl::GetFlag(FLAGS_int_flag), 3);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseDeathTest, TestSubstringHelpFlagHandling) {
-  const char* in_args1[] = {
-      "testbin",
-      "--help=abcd",
-  };
-
-  auto out_args1 = flags::ParseCommandLineImpl(
-      2, const_cast<char**>(in_args1), flags::ArgvListAction::kRemoveParsedArgs,
-      flags::UsageFlagsAction::kIgnoreUsage,
-      flags::OnUndefinedFlag::kAbortIfUndefined);
-
-  EXPECT_EQ(flags::GetFlagsHelpMode(), flags::HelpMode::kMatch);
-  EXPECT_EQ(flags::GetFlagsHelpMatchSubstr(), "abcd");
-
-  const char* in_args2[] = {"testbin", "--help", "some_positional_arg"};
-
-  auto out_args2 = flags::ParseCommandLineImpl(
-      3, const_cast<char**>(in_args2), flags::ArgvListAction::kRemoveParsedArgs,
-      flags::UsageFlagsAction::kIgnoreUsage,
-      flags::OnUndefinedFlag::kAbortIfUndefined);
-
-  EXPECT_EQ(flags::GetFlagsHelpMode(), flags::HelpMode::kImportant);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ParseTest, WasPresentOnCommandLine) {
-  const char* in_args1[] = {
-      "testbin",        "arg1", "--bool_flag",
-      "--int_flag=211", "arg2", "--double_flag=1.1",
-      "--string_flag",  "asd",  "--",
-      "--some_flag",    "arg4",
-  };
-
-  InvokeParse(in_args1);
-
-  EXPECT_TRUE(flags::WasPresentOnCommandLine("bool_flag"));
-  EXPECT_TRUE(flags::WasPresentOnCommandLine("int_flag"));
-  EXPECT_TRUE(flags::WasPresentOnCommandLine("double_flag"));
-  EXPECT_TRUE(flags::WasPresentOnCommandLine("string_flag"));
-  EXPECT_FALSE(flags::WasPresentOnCommandLine("some_flag"));
-  EXPECT_FALSE(flags::WasPresentOnCommandLine("another_flag"));
-}
-
-// --------------------------------------------------------------------
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/reflection.cc b/third_party/abseil/absl/flags/reflection.cc
deleted file mode 100644
index c976d46..0000000
--- a/third_party/abseil/absl/flags/reflection.cc
+++ /dev/null
@@ -1,337 +0,0 @@
-//
-//  Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/reflection.h"
-
-#include <assert.h>
-
-#include <atomic>
-#include <map>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/internal/private_handle_accessor.h"
-#include "absl/flags/internal/registry.h"
-#include "absl/flags/usage_config.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-// --------------------------------------------------------------------
-// FlagRegistry
-//    A FlagRegistry singleton object holds all flag objects indexed by their
-//    names so that if you know a flag's name, you can access or set it. If the
-//    function is named FooLocked(), you must own the registry lock before
-//    calling the function; otherwise, you should *not* hold the lock, and the
-//    function will acquire it itself if needed.
-// --------------------------------------------------------------------
-
-class FlagRegistry {
- public:
-  FlagRegistry() = default;
-  ~FlagRegistry() = default;
-
-  // Store a flag in this registry. Takes ownership of *flag.
-  void RegisterFlag(CommandLineFlag& flag);
-
-  void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION(lock_) { lock_.Lock(); }
-  void Unlock() ABSL_UNLOCK_FUNCTION(lock_) { lock_.Unlock(); }
-
-  // Returns the flag object for the specified name, or nullptr if not found.
-  // Will emit a warning if a 'retired' flag is specified.
-  CommandLineFlag* FindFlag(absl::string_view name);
-
-  static FlagRegistry& GlobalRegistry();  // returns a singleton registry
-
- private:
-  friend class flags_internal::FlagSaverImpl;  // reads all the flags in order
-                                               // to copy them
-  friend void ForEachFlag(std::function<void(CommandLineFlag&)> visitor);
-  friend void FinalizeRegistry();
-
-  // The map from name to flag, for FindFlag().
-  using FlagMap = std::map<absl::string_view, CommandLineFlag*>;
-  using FlagIterator = FlagMap::iterator;
-  using FlagConstIterator = FlagMap::const_iterator;
-  FlagMap flags_;
-  std::vector<CommandLineFlag*> flat_flags_;
-  std::atomic<bool> finalized_flags_{false};
-
-  absl::Mutex lock_;
-
-  // Disallow
-  FlagRegistry(const FlagRegistry&);
-  FlagRegistry& operator=(const FlagRegistry&);
-};
-
-namespace {
-
-class FlagRegistryLock {
- public:
-  explicit FlagRegistryLock(FlagRegistry& fr) : fr_(fr) { fr_.Lock(); }
-  ~FlagRegistryLock() { fr_.Unlock(); }
-
- private:
-  FlagRegistry& fr_;
-};
-
-}  // namespace
-
-CommandLineFlag* FlagRegistry::FindFlag(absl::string_view name) {
-  if (finalized_flags_.load(std::memory_order_acquire)) {
-    // We could save some gcus here if we make `Name()` be non-virtual.
-    // We could move the `const char*` name to the base class.
-    auto it = std::partition_point(
-        flat_flags_.begin(), flat_flags_.end(),
-        [=](CommandLineFlag* f) { return f->Name() < name; });
-    if (it != flat_flags_.end() && (*it)->Name() == name) return *it;
-  }
-
-  FlagRegistryLock frl(*this);
-  auto it = flags_.find(name);
-  return it != flags_.end() ? it->second : nullptr;
-}
-
-void FlagRegistry::RegisterFlag(CommandLineFlag& flag) {
-  FlagRegistryLock registry_lock(*this);
-
-  std::pair<FlagIterator, bool> ins =
-      flags_.insert(FlagMap::value_type(flag.Name(), &flag));
-  if (ins.second == false) {  // means the name was already in the map
-    CommandLineFlag& old_flag = *ins.first->second;
-    if (flag.IsRetired() != old_flag.IsRetired()) {
-      // All registrations must agree on the 'retired' flag.
-      flags_internal::ReportUsageError(
-          absl::StrCat(
-              "Retired flag '", flag.Name(), "' was defined normally in file '",
-              (flag.IsRetired() ? old_flag.Filename() : flag.Filename()), "'."),
-          true);
-    } else if (flags_internal::PrivateHandleAccessor::TypeId(flag) !=
-               flags_internal::PrivateHandleAccessor::TypeId(old_flag)) {
-      flags_internal::ReportUsageError(
-          absl::StrCat("Flag '", flag.Name(),
-                       "' was defined more than once but with "
-                       "differing types. Defined in files '",
-                       old_flag.Filename(), "' and '", flag.Filename(), "'."),
-          true);
-    } else if (old_flag.IsRetired()) {
-      return;
-    } else if (old_flag.Filename() != flag.Filename()) {
-      flags_internal::ReportUsageError(
-          absl::StrCat("Flag '", flag.Name(),
-                       "' was defined more than once (in files '",
-                       old_flag.Filename(), "' and '", flag.Filename(), "')."),
-          true);
-    } else {
-      flags_internal::ReportUsageError(
-          absl::StrCat(
-              "Something is wrong with flag '", flag.Name(), "' in file '",
-              flag.Filename(), "'. One possibility: file '", flag.Filename(),
-              "' is being linked both statically and dynamically into this "
-              "executable. e.g. some files listed as srcs to a test and also "
-              "listed as srcs of some shared lib deps of the same test."),
-          true);
-    }
-    // All cases above are fatal, except for the retired flags.
-    std::exit(1);
-  }
-}
-
-FlagRegistry& FlagRegistry::GlobalRegistry() {
-  static FlagRegistry* global_registry = new FlagRegistry;
-  return *global_registry;
-}
-
-// --------------------------------------------------------------------
-
-void ForEachFlag(std::function<void(CommandLineFlag&)> visitor) {
-  FlagRegistry& registry = FlagRegistry::GlobalRegistry();
-
-  if (registry.finalized_flags_.load(std::memory_order_acquire)) {
-    for (const auto& i : registry.flat_flags_) visitor(*i);
-  }
-
-  FlagRegistryLock frl(registry);
-  for (const auto& i : registry.flags_) visitor(*i.second);
-}
-
-// --------------------------------------------------------------------
-
-bool RegisterCommandLineFlag(CommandLineFlag& flag) {
-  FlagRegistry::GlobalRegistry().RegisterFlag(flag);
-  return true;
-}
-
-void FinalizeRegistry() {
-  auto& registry = FlagRegistry::GlobalRegistry();
-  FlagRegistryLock frl(registry);
-  if (registry.finalized_flags_.load(std::memory_order_relaxed)) {
-    // Was already finalized. Ignore the second time.
-    return;
-  }
-  registry.flat_flags_.reserve(registry.flags_.size());
-  for (const auto& f : registry.flags_) {
-    registry.flat_flags_.push_back(f.second);
-  }
-  registry.flags_.clear();
-  registry.finalized_flags_.store(true, std::memory_order_release);
-}
-
-// --------------------------------------------------------------------
-
-namespace {
-
-class RetiredFlagObj final : public CommandLineFlag {
- public:
-  constexpr RetiredFlagObj(const char* name, FlagFastTypeId type_id)
-      : name_(name), type_id_(type_id) {}
-
- private:
-  absl::string_view Name() const override { return name_; }
-  std::string Filename() const override {
-    OnAccess();
-    return "RETIRED";
-  }
-  FlagFastTypeId TypeId() const override { return type_id_; }
-  std::string Help() const override {
-    OnAccess();
-    return "";
-  }
-  bool IsRetired() const override { return true; }
-  bool IsSpecifiedOnCommandLine() const override {
-    OnAccess();
-    return false;
-  }
-  std::string DefaultValue() const override {
-    OnAccess();
-    return "";
-  }
-  std::string CurrentValue() const override {
-    OnAccess();
-    return "";
-  }
-
-  // Any input is valid
-  bool ValidateInputValue(absl::string_view) const override {
-    OnAccess();
-    return true;
-  }
-
-  std::unique_ptr<flags_internal::FlagStateInterface> SaveState() override {
-    return nullptr;
-  }
-
-  bool ParseFrom(absl::string_view, flags_internal::FlagSettingMode,
-                 flags_internal::ValueSource, std::string&) override {
-    OnAccess();
-    return false;
-  }
-
-  void CheckDefaultValueParsingRoundtrip() const override { OnAccess(); }
-
-  void Read(void*) const override { OnAccess(); }
-
-  void OnAccess() const {
-    flags_internal::ReportUsageError(
-        absl::StrCat("Accessing retired flag '", name_, "'"), false);
-  }
-
-  // Data members
-  const char* const name_;
-  const FlagFastTypeId type_id_;
-};
-
-}  // namespace
-
-void Retire(const char* name, FlagFastTypeId type_id, char* buf) {
-  static_assert(sizeof(RetiredFlagObj) == kRetiredFlagObjSize, "");
-  static_assert(alignof(RetiredFlagObj) == kRetiredFlagObjAlignment, "");
-  auto* flag = ::new (static_cast<void*>(buf))
-      flags_internal::RetiredFlagObj(name, type_id);
-  FlagRegistry::GlobalRegistry().RegisterFlag(*flag);
-}
-
-// --------------------------------------------------------------------
-
-class FlagSaverImpl {
- public:
-  FlagSaverImpl() = default;
-  FlagSaverImpl(const FlagSaverImpl&) = delete;
-  void operator=(const FlagSaverImpl&) = delete;
-
-  // Saves the flag states from the flag registry into this object.
-  // It's an error to call this more than once.
-  void SaveFromRegistry() {
-    assert(backup_registry_.empty());  // call only once!
-    flags_internal::ForEachFlag([&](CommandLineFlag& flag) {
-      if (auto flag_state =
-              flags_internal::PrivateHandleAccessor::SaveState(flag)) {
-        backup_registry_.emplace_back(std::move(flag_state));
-      }
-    });
-  }
-
-  // Restores the saved flag states into the flag registry.
-  void RestoreToRegistry() {
-    for (const auto& flag_state : backup_registry_) {
-      flag_state->Restore();
-    }
-  }
-
- private:
-  std::vector<std::unique_ptr<flags_internal::FlagStateInterface>>
-      backup_registry_;
-};
-
-}  // namespace flags_internal
-
-FlagSaver::FlagSaver() : impl_(new flags_internal::FlagSaverImpl) {
-  impl_->SaveFromRegistry();
-}
-
-FlagSaver::~FlagSaver() {
-  if (!impl_) return;
-
-  impl_->RestoreToRegistry();
-  delete impl_;
-}
-
-// --------------------------------------------------------------------
-
-CommandLineFlag* FindCommandLineFlag(absl::string_view name) {
-  if (name.empty()) return nullptr;
-  flags_internal::FlagRegistry& registry =
-      flags_internal::FlagRegistry::GlobalRegistry();
-  return registry.FindFlag(name);
-}
-
-// --------------------------------------------------------------------
-
-absl::flat_hash_map<absl::string_view, absl::CommandLineFlag*> GetAllFlags() {
-  absl::flat_hash_map<absl::string_view, absl::CommandLineFlag*> res;
-  flags_internal::ForEachFlag([&](CommandLineFlag& flag) {
-    if (!flag.IsRetired()) res.insert({flag.Name(), &flag});
-  });
-  return res;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/reflection.h b/third_party/abseil/absl/flags/reflection.h
deleted file mode 100644
index e6baf5d..0000000
--- a/third_party/abseil/absl/flags/reflection.h
+++ /dev/null
@@ -1,90 +0,0 @@
-//
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: reflection.h
-// -----------------------------------------------------------------------------
-//
-// This file defines the routines to access and operate on an Abseil Flag's
-// reflection handle.
-
-#ifndef ABSL_FLAGS_REFLECTION_H_
-#define ABSL_FLAGS_REFLECTION_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/container/flat_hash_map.h"
-#include "absl/flags/commandlineflag.h"
-#include "absl/flags/internal/commandlineflag.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-class FlagSaverImpl;
-}  // namespace flags_internal
-
-// FindCommandLineFlag()
-//
-// Returns the reflection handle of an Abseil flag of the specified name, or
-// `nullptr` if not found. This function will emit a warning if the name of a
-// 'retired' flag is specified.
-absl::CommandLineFlag* FindCommandLineFlag(absl::string_view name);
-
-// Returns current state of the Flags registry in a form of mapping from flag
-// name to a flag reflection handle.
-absl::flat_hash_map<absl::string_view, absl::CommandLineFlag*> GetAllFlags();
-
-//------------------------------------------------------------------------------
-// FlagSaver
-//------------------------------------------------------------------------------
-//
-// A FlagSaver object stores the state of flags in the scope where the FlagSaver
-// is defined, allowing modification of those flags within that scope and
-// automatic restoration of the flags to their previous state upon leaving the
-// scope.
-//
-// A FlagSaver can be used within tests to temporarily change the test
-// environment and restore the test case to its previous state.
-//
-// Example:
-//
-//   void MyFunc() {
-//    absl::FlagSaver fs;
-//    ...
-//    absl::SetFlag(&FLAGS_myFlag, otherValue);
-//    ...
-//  } // scope of FlagSaver left, flags return to previous state
-//
-// This class is thread-safe.
-
-class FlagSaver {
- public:
-  FlagSaver();
-  ~FlagSaver();
-
-  FlagSaver(const FlagSaver&) = delete;
-  void operator=(const FlagSaver&) = delete;
-
- private:
-  flags_internal::FlagSaverImpl* impl_;
-};
-
-//-----------------------------------------------------------------------------
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_REFLECTION_H_
diff --git a/third_party/abseil/absl/flags/reflection_test.cc b/third_party/abseil/absl/flags/reflection_test.cc
deleted file mode 100644
index 4c80900..0000000
--- a/third_party/abseil/absl/flags/reflection_test.cc
+++ /dev/null
@@ -1,267 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/reflection.h"
-
-#include <memory>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/flags/declare.h"
-#include "absl/flags/flag.h"
-#include "absl/flags/internal/commandlineflag.h"
-#include "absl/flags/marshalling.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-
-ABSL_FLAG(int, int_flag, 1, "int_flag help");
-ABSL_FLAG(std::string, string_flag, "dflt", "string_flag help");
-ABSL_RETIRED_FLAG(bool, bool_retired_flag, false, "bool_retired_flag help");
-
-namespace {
-
-namespace flags = absl::flags_internal;
-
-class ReflectionTest : public testing::Test {
- protected:
-  void SetUp() override { flag_saver_ = absl::make_unique<absl::FlagSaver>(); }
-  void TearDown() override { flag_saver_.reset(); }
-
- private:
-  std::unique_ptr<absl::FlagSaver> flag_saver_;
-};
-
-// --------------------------------------------------------------------
-
-TEST_F(ReflectionTest, TestFindCommandLineFlag) {
-  auto* handle = absl::FindCommandLineFlag("some_flag");
-  EXPECT_EQ(handle, nullptr);
-
-  handle = absl::FindCommandLineFlag("int_flag");
-  EXPECT_NE(handle, nullptr);
-
-  handle = absl::FindCommandLineFlag("string_flag");
-  EXPECT_NE(handle, nullptr);
-
-  handle = absl::FindCommandLineFlag("bool_retired_flag");
-  EXPECT_NE(handle, nullptr);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ReflectionTest, TestGetAllFlags) {
-  auto all_flags = absl::GetAllFlags();
-  EXPECT_NE(all_flags.find("int_flag"), all_flags.end());
-  EXPECT_EQ(all_flags.find("bool_retired_flag"), all_flags.end());
-  EXPECT_EQ(all_flags.find("some_undefined_flag"), all_flags.end());
-
-  std::vector<absl::string_view> flag_names_first_attempt;
-  auto all_flags_1 = absl::GetAllFlags();
-  for (auto f : all_flags_1) {
-    flag_names_first_attempt.push_back(f.first);
-  }
-
-  std::vector<absl::string_view> flag_names_second_attempt;
-  auto all_flags_2 = absl::GetAllFlags();
-  for (auto f : all_flags_2) {
-    flag_names_second_attempt.push_back(f.first);
-  }
-
-  EXPECT_THAT(flag_names_first_attempt,
-              ::testing::UnorderedElementsAreArray(flag_names_second_attempt));
-}
-
-// --------------------------------------------------------------------
-
-struct CustomUDT {
-  CustomUDT() : a(1), b(1) {}
-  CustomUDT(int a_, int b_) : a(a_), b(b_) {}
-
-  friend bool operator==(const CustomUDT& f1, const CustomUDT& f2) {
-    return f1.a == f2.a && f1.b == f2.b;
-  }
-
-  int a;
-  int b;
-};
-bool AbslParseFlag(absl::string_view in, CustomUDT* f, std::string*) {
-  std::vector<absl::string_view> parts =
-      absl::StrSplit(in, ':', absl::SkipWhitespace());
-
-  if (parts.size() != 2) return false;
-
-  if (!absl::SimpleAtoi(parts[0], &f->a)) return false;
-
-  if (!absl::SimpleAtoi(parts[1], &f->b)) return false;
-
-  return true;
-}
-std::string AbslUnparseFlag(const CustomUDT& f) {
-  return absl::StrCat(f.a, ":", f.b);
-}
-
-}  // namespace
-
-// --------------------------------------------------------------------
-
-ABSL_FLAG(bool, test_flag_01, true, "");
-ABSL_FLAG(int, test_flag_02, 1234, "");
-ABSL_FLAG(int16_t, test_flag_03, -34, "");
-ABSL_FLAG(uint16_t, test_flag_04, 189, "");
-ABSL_FLAG(int32_t, test_flag_05, 10765, "");
-ABSL_FLAG(uint32_t, test_flag_06, 40000, "");
-ABSL_FLAG(int64_t, test_flag_07, -1234567, "");
-ABSL_FLAG(uint64_t, test_flag_08, 9876543, "");
-ABSL_FLAG(double, test_flag_09, -9.876e-50, "");
-ABSL_FLAG(float, test_flag_10, 1.234e12f, "");
-ABSL_FLAG(std::string, test_flag_11, "", "");
-ABSL_FLAG(absl::Duration, test_flag_12, absl::Minutes(10), "");
-static int counter = 0;
-ABSL_FLAG(int, test_flag_13, 200, "").OnUpdate([]() { counter++; });
-ABSL_FLAG(CustomUDT, test_flag_14, {}, "");
-
-namespace {
-
-TEST_F(ReflectionTest, TestFlagSaverInScope) {
-  {
-    absl::FlagSaver s;
-    counter = 0;
-    absl::SetFlag(&FLAGS_test_flag_01, false);
-    absl::SetFlag(&FLAGS_test_flag_02, -1021);
-    absl::SetFlag(&FLAGS_test_flag_03, 6009);
-    absl::SetFlag(&FLAGS_test_flag_04, 44);
-    absl::SetFlag(&FLAGS_test_flag_05, +800);
-    absl::SetFlag(&FLAGS_test_flag_06, -40978756);
-    absl::SetFlag(&FLAGS_test_flag_07, 23405);
-    absl::SetFlag(&FLAGS_test_flag_08, 975310);
-    absl::SetFlag(&FLAGS_test_flag_09, 1.00001);
-    absl::SetFlag(&FLAGS_test_flag_10, -3.54f);
-    absl::SetFlag(&FLAGS_test_flag_11, "asdf");
-    absl::SetFlag(&FLAGS_test_flag_12, absl::Hours(20));
-    absl::SetFlag(&FLAGS_test_flag_13, 4);
-    absl::SetFlag(&FLAGS_test_flag_14, CustomUDT{-1, -2});
-  }
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_01), true);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_02), 1234);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_03), -34);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_04), 189);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_05), 10765);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_06), 40000);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_07), -1234567);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 9876543);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_09), -9.876e-50, 1e-55);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_10), 1.234e12f, 1e5f);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_11), "");
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_12), absl::Minutes(10));
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_13), 200);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_14), CustomUDT{});
-  EXPECT_EQ(counter, 2);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ReflectionTest, TestFlagSaverVsUpdateViaReflection) {
-  {
-    absl::FlagSaver s;
-    counter = 0;
-    std::string error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_01")->ParseFrom("false", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_02")->ParseFrom("-4536", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_03")->ParseFrom("111", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_04")->ParseFrom("909", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_05")->ParseFrom("-2004", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_06")->ParseFrom("1000023", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_07")->ParseFrom("69305", &error))
-        << error;
-    EXPECT_TRUE(absl::FindCommandLineFlag("test_flag_08")
-                    ->ParseFrom("1000000001", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_09")->ParseFrom("2.09021", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_10")->ParseFrom("-33.1", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_11")->ParseFrom("ADD_FOO", &error))
-        << error;
-    EXPECT_TRUE(absl::FindCommandLineFlag("test_flag_12")
-                    ->ParseFrom("3h11m16s", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_13")->ParseFrom("0", &error))
-        << error;
-    EXPECT_TRUE(
-        absl::FindCommandLineFlag("test_flag_14")->ParseFrom("10:1", &error))
-        << error;
-  }
-
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_01), true);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_02), 1234);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_03), -34);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_04), 189);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_05), 10765);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_06), 40000);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_07), -1234567);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 9876543);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_09), -9.876e-50, 1e-55);
-  EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_10), 1.234e12f, 1e5f);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_11), "");
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_12), absl::Minutes(10));
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_13), 200);
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_14), CustomUDT{});
-  EXPECT_EQ(counter, 2);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(ReflectionTest, TestMultipleFlagSaversInEnclosedScopes) {
-  {
-    absl::FlagSaver s;
-    absl::SetFlag(&FLAGS_test_flag_08, 10);
-    EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 10);
-    {
-      absl::FlagSaver s;
-      absl::SetFlag(&FLAGS_test_flag_08, 20);
-      EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 20);
-      {
-        absl::FlagSaver s;
-        absl::SetFlag(&FLAGS_test_flag_08, -200);
-        EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), -200);
-      }
-      EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 20);
-    }
-    EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 10);
-  }
-  EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 9876543);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/flags/usage.cc b/third_party/abseil/absl/flags/usage.cc
deleted file mode 100644
index 452f667..0000000
--- a/third_party/abseil/absl/flags/usage.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include "absl/flags/usage.h"
-
-#include <stdlib.h>
-
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/const_init.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/flags/internal/usage.h"
-#include "absl/strings/string_view.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-namespace {
-ABSL_CONST_INIT absl::Mutex usage_message_guard(absl::kConstInit);
-ABSL_CONST_INIT std::string* program_usage_message
-    ABSL_GUARDED_BY(usage_message_guard) = nullptr;
-}  // namespace
-}  // namespace flags_internal
-
-// --------------------------------------------------------------------
-// Sets the "usage" message to be used by help reporting routines.
-void SetProgramUsageMessage(absl::string_view new_usage_message) {
-  absl::MutexLock l(&flags_internal::usage_message_guard);
-
-  if (flags_internal::program_usage_message != nullptr) {
-    ABSL_INTERNAL_LOG(FATAL, "SetProgramUsageMessage() called twice.");
-    std::exit(1);
-  }
-
-  flags_internal::program_usage_message = new std::string(new_usage_message);
-}
-
-// --------------------------------------------------------------------
-// Returns the usage message set by SetProgramUsageMessage().
-// Note: We able to return string_view here only because calling
-// SetProgramUsageMessage twice is prohibited.
-absl::string_view ProgramUsageMessage() {
-  absl::MutexLock l(&flags_internal::usage_message_guard);
-
-  return flags_internal::program_usage_message != nullptr
-             ? absl::string_view(*flags_internal::program_usage_message)
-             : "Warning: SetProgramUsageMessage() never called";
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/usage.h b/third_party/abseil/absl/flags/usage.h
deleted file mode 100644
index ad12ab7..0000000
--- a/third_party/abseil/absl/flags/usage.h
+++ /dev/null
@@ -1,43 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FLAGS_USAGE_H_
-#define ABSL_FLAGS_USAGE_H_
-
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-// --------------------------------------------------------------------
-// Usage reporting interfaces
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Sets the "usage" message to be used by help reporting routines.
-// For example:
-//  absl::SetProgramUsageMessage(
-//      absl::StrCat("This program does nothing.  Sample usage:\n", argv[0],
-//                   " <uselessarg1> <uselessarg2>"));
-// Do not include commandline flags in the usage: we do that for you!
-// Note: Calling SetProgramUsageMessage twice will trigger a call to std::exit.
-void SetProgramUsageMessage(absl::string_view new_usage_message);
-
-// Returns the usage message set by SetProgramUsageMessage().
-absl::string_view ProgramUsageMessage();
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FLAGS_USAGE_H_
diff --git a/third_party/abseil/absl/flags/usage_config.cc b/third_party/abseil/absl/flags/usage_config.cc
deleted file mode 100644
index ae2f548..0000000
--- a/third_party/abseil/absl/flags/usage_config.cc
+++ /dev/null
@@ -1,164 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/usage_config.h"
-
-#include <functional>
-#include <iostream>
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/const_init.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/flags/internal/path_util.h"
-#include "absl/flags/internal/program_name.h"
-#include "absl/strings/match.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-#include "absl/synchronization/mutex.h"
-
-extern "C" {
-
-// Additional report of fatal usage error message before we std::exit. Error is
-// fatal if is_fatal argument to ReportUsageError is true.
-ABSL_ATTRIBUTE_WEAK void AbslInternalReportFatalUsageError(absl::string_view) {}
-
-}  // extern "C"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace flags_internal {
-
-namespace {
-
-// --------------------------------------------------------------------
-// Returns true if flags defined in the filename should be reported with
-// -helpshort flag.
-
-bool ContainsHelpshortFlags(absl::string_view filename) {
-  // By default we only want flags in binary's main. We expect the main
-  // routine to reside in <program>.cc or <program>-main.cc or
-  // <program>_main.cc, where the <program> is the name of the binary
-  // (without .exe on Windows).
-  auto suffix = flags_internal::Basename(filename);
-  auto program_name = flags_internal::ShortProgramInvocationName();
-  absl::string_view program_name_ref = program_name;
-#if defined(_WIN32)
-  absl::ConsumeSuffix(&program_name_ref, ".exe");
-#endif
-  if (!absl::ConsumePrefix(&suffix, program_name_ref))
-    return false;
-  return absl::StartsWith(suffix, ".") || absl::StartsWith(suffix, "-main.") ||
-         absl::StartsWith(suffix, "_main.");
-}
-
-// --------------------------------------------------------------------
-// Returns true if flags defined in the filename should be reported with
-// -helppackage flag.
-
-bool ContainsHelppackageFlags(absl::string_view filename) {
-  // TODO(rogeeff): implement properly when registry is available.
-  return ContainsHelpshortFlags(filename);
-}
-
-// --------------------------------------------------------------------
-// Generates program version information into supplied output.
-
-std::string VersionString() {
-  std::string version_str(flags_internal::ShortProgramInvocationName());
-
-  version_str += "\n";
-
-#if !defined(NDEBUG)
-  version_str += "Debug build (NDEBUG not #defined)\n";
-#endif
-
-  return version_str;
-}
-
-// --------------------------------------------------------------------
-// Normalizes the filename specific to the build system/filesystem used.
-
-std::string NormalizeFilename(absl::string_view filename) {
-  // Skip any leading slashes
-  auto pos = filename.find_first_not_of("\\/");
-  if (pos == absl::string_view::npos) return "";
-
-  filename.remove_prefix(pos);
-  return std::string(filename);
-}
-
-// --------------------------------------------------------------------
-
-ABSL_CONST_INIT absl::Mutex custom_usage_config_guard(absl::kConstInit);
-ABSL_CONST_INIT FlagsUsageConfig* custom_usage_config
-    ABSL_GUARDED_BY(custom_usage_config_guard) = nullptr;
-
-}  // namespace
-
-FlagsUsageConfig GetUsageConfig() {
-  absl::MutexLock l(&custom_usage_config_guard);
-
-  if (custom_usage_config) return *custom_usage_config;
-
-  FlagsUsageConfig default_config;
-  default_config.contains_helpshort_flags = &ContainsHelpshortFlags;
-  default_config.contains_help_flags = &ContainsHelppackageFlags;
-  default_config.contains_helppackage_flags = &ContainsHelppackageFlags;
-  default_config.version_string = &VersionString;
-  default_config.normalize_filename = &NormalizeFilename;
-
-  return default_config;
-}
-
-void ReportUsageError(absl::string_view msg, bool is_fatal) {
-  std::cerr << "ERROR: " << msg << std::endl;
-
-  if (is_fatal) {
-    AbslInternalReportFatalUsageError(msg);
-  }
-}
-
-}  // namespace flags_internal
-
-void SetFlagsUsageConfig(FlagsUsageConfig usage_config) {
-  absl::MutexLock l(&flags_internal::custom_usage_config_guard);
-
-  if (!usage_config.contains_helpshort_flags)
-    usage_config.contains_helpshort_flags =
-        flags_internal::ContainsHelpshortFlags;
-
-  if (!usage_config.contains_help_flags)
-    usage_config.contains_help_flags = flags_internal::ContainsHelppackageFlags;
-
-  if (!usage_config.contains_helppackage_flags)
-    usage_config.contains_helppackage_flags =
-        flags_internal::ContainsHelppackageFlags;
-
-  if (!usage_config.version_string)
-    usage_config.version_string = flags_internal::VersionString;
-
-  if (!usage_config.normalize_filename)
-    usage_config.normalize_filename = flags_internal::NormalizeFilename;
-
-  if (flags_internal::custom_usage_config)
-    *flags_internal::custom_usage_config = usage_config;
-  else
-    flags_internal::custom_usage_config = new FlagsUsageConfig(usage_config);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/flags/usage_config.h b/third_party/abseil/absl/flags/usage_config.h
deleted file mode 100644
index 96eecea..0000000
--- a/third_party/abseil/absl/flags/usage_config.h
+++ /dev/null
@@ -1,134 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: usage_config.h
-// -----------------------------------------------------------------------------
-//
-// This file defines the main usage reporting configuration interfaces and
-// documents Abseil's supported built-in usage flags. If these flags are found
-// when parsing a command-line, Abseil will exit the program and display
-// appropriate help messages.
-#ifndef ABSL_FLAGS_USAGE_CONFIG_H_
-#define ABSL_FLAGS_USAGE_CONFIG_H_
-
-#include <functional>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-// -----------------------------------------------------------------------------
-// Built-in Usage Flags
-// -----------------------------------------------------------------------------
-//
-// Abseil supports the following built-in usage flags. When passed, these flags
-// exit the program and :
-//
-// * --help
-//     Shows help on important flags for this binary
-// * --helpfull
-//     Shows help on all flags
-// * --helpshort
-//     Shows help on only the main module for this program
-// * --helppackage
-//     Shows help on all modules in the main package
-// * --version
-//     Shows the version and build info for this binary and exits
-// * --only_check_args
-//     Exits after checking all flags
-// * --helpon
-//     Shows help on the modules named by this flag value
-// * --helpmatch
-//     Shows help on modules whose name contains the specified substring
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace flags_internal {
-using FlagKindFilter = std::function<bool (absl::string_view)>;
-}  // namespace flags_internal
-
-// FlagsUsageConfig
-//
-// This structure contains the collection of callbacks for changing the behavior
-// of the usage reporting routines in Abseil Flags.
-struct FlagsUsageConfig {
-  // Returns true if flags defined in the given source code file should be
-  // reported with --helpshort flag. For example, if the file
-  // "path/to/my/code.cc" defines the flag "--my_flag", and
-  // contains_helpshort_flags("path/to/my/code.cc") returns true, invoking the
-  // program with --helpshort will include information about --my_flag in the
-  // program output.
-  flags_internal::FlagKindFilter contains_helpshort_flags;
-
-  // Returns true if flags defined in the filename should be reported with
-  // --help flag. For example, if the file
-  // "path/to/my/code.cc" defines the flag "--my_flag", and
-  // contains_help_flags("path/to/my/code.cc") returns true, invoking the
-  // program with --help will include information about --my_flag in the
-  // program output.
-  flags_internal::FlagKindFilter contains_help_flags;
-
-  // Returns true if flags defined in the filename should be reported with
-  // --helppackage flag. For example, if the file
-  // "path/to/my/code.cc" defines the flag "--my_flag", and
-  // contains_helppackage_flags("path/to/my/code.cc") returns true, invoking the
-  // program with --helppackage will include information about --my_flag in the
-  // program output.
-  flags_internal::FlagKindFilter contains_helppackage_flags;
-
-  // Generates string containing program version. This is the string reported
-  // when user specifies --version in a command line.
-  std::function<std::string()> version_string;
-
-  // Normalizes the filename specific to the build system/filesystem used. This
-  // routine is used when we report the information about the flag definition
-  // location. For instance, if your build resides at some location you do not
-  // want to expose in the usage output, you can trim it to show only relevant
-  // part.
-  // For example:
-  //   normalize_filename("/my_company/some_long_path/src/project/file.cc")
-  // might produce
-  //   "project/file.cc".
-  std::function<std::string(absl::string_view)> normalize_filename;
-};
-
-// SetFlagsUsageConfig()
-//
-// Sets the usage reporting configuration callbacks. If any of the callbacks are
-// not set in usage_config instance, then the default value of the callback is
-// used.
-void SetFlagsUsageConfig(FlagsUsageConfig usage_config);
-
-namespace flags_internal {
-
-FlagsUsageConfig GetUsageConfig();
-
-void ReportUsageError(absl::string_view msg, bool is_fatal);
-
-}  // namespace flags_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-extern "C" {
-
-// Additional report of fatal usage error message before we std::exit. Error is
-// fatal if is_fatal argument to ReportUsageError is true.
-void AbslInternalReportFatalUsageError(absl::string_view);
-
-}  // extern "C"
-
-#endif  // ABSL_FLAGS_USAGE_CONFIG_H_
diff --git a/third_party/abseil/absl/flags/usage_config_test.cc b/third_party/abseil/absl/flags/usage_config_test.cc
deleted file mode 100644
index e57a883..0000000
--- a/third_party/abseil/absl/flags/usage_config_test.cc
+++ /dev/null
@@ -1,205 +0,0 @@
-//
-//  Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/flags/usage_config.h"
-
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/flags/internal/path_util.h"
-#include "absl/flags/internal/program_name.h"
-#include "absl/strings/match.h"
-#include "absl/strings/string_view.h"
-
-namespace {
-
-class FlagsUsageConfigTest : public testing::Test {
- protected:
-  void SetUp() override {
-    // Install Default config for the use on this unit test.
-    // Binary may install a custom config before tests are run.
-    absl::FlagsUsageConfig default_config;
-    absl::SetFlagsUsageConfig(default_config);
-  }
-};
-
-namespace flags = absl::flags_internal;
-
-bool TstContainsHelpshortFlags(absl::string_view f) {
-  return absl::StartsWith(flags::Basename(f), "progname.");
-}
-
-bool TstContainsHelppackageFlags(absl::string_view f) {
-  return absl::EndsWith(flags::Package(f), "aaa/");
-}
-
-bool TstContainsHelpFlags(absl::string_view f) {
-  return absl::EndsWith(flags::Package(f), "zzz/");
-}
-
-std::string TstVersionString() { return "program 1.0.0"; }
-
-std::string TstNormalizeFilename(absl::string_view filename) {
-  return std::string(filename.substr(2));
-}
-
-void TstReportUsageMessage(absl::string_view msg) {}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagsUsageConfigTest, TestGetSetFlagsUsageConfig) {
-  EXPECT_TRUE(flags::GetUsageConfig().contains_helpshort_flags);
-  EXPECT_TRUE(flags::GetUsageConfig().contains_help_flags);
-  EXPECT_TRUE(flags::GetUsageConfig().contains_helppackage_flags);
-  EXPECT_TRUE(flags::GetUsageConfig().version_string);
-  EXPECT_TRUE(flags::GetUsageConfig().normalize_filename);
-
-  absl::FlagsUsageConfig empty_config;
-  empty_config.contains_helpshort_flags = &TstContainsHelpshortFlags;
-  empty_config.contains_help_flags = &TstContainsHelpFlags;
-  empty_config.contains_helppackage_flags = &TstContainsHelppackageFlags;
-  empty_config.version_string = &TstVersionString;
-  empty_config.normalize_filename = &TstNormalizeFilename;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_TRUE(flags::GetUsageConfig().contains_helpshort_flags);
-  EXPECT_TRUE(flags::GetUsageConfig().contains_help_flags);
-  EXPECT_TRUE(flags::GetUsageConfig().contains_helppackage_flags);
-  EXPECT_TRUE(flags::GetUsageConfig().version_string);
-  EXPECT_TRUE(flags::GetUsageConfig().normalize_filename);
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagsUsageConfigTest, TestContainsHelpshortFlags) {
-#if defined(_WIN32)
-  flags::SetProgramInvocationName("usage_config_test.exe");
-#else
-  flags::SetProgramInvocationName("usage_config_test");
-#endif
-
-  auto config = flags::GetUsageConfig();
-  EXPECT_TRUE(config.contains_helpshort_flags("adir/cd/usage_config_test.cc"));
-  EXPECT_TRUE(
-      config.contains_helpshort_flags("aaaa/usage_config_test-main.cc"));
-  EXPECT_TRUE(config.contains_helpshort_flags("abc/usage_config_test_main.cc"));
-  EXPECT_FALSE(config.contains_helpshort_flags("usage_config_main.cc"));
-
-  absl::FlagsUsageConfig empty_config;
-  empty_config.contains_helpshort_flags = &TstContainsHelpshortFlags;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_TRUE(
-      flags::GetUsageConfig().contains_helpshort_flags("aaa/progname.cpp"));
-  EXPECT_FALSE(
-      flags::GetUsageConfig().contains_helpshort_flags("aaa/progmane.cpp"));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagsUsageConfigTest, TestContainsHelpFlags) {
-  flags::SetProgramInvocationName("usage_config_test");
-
-  auto config = flags::GetUsageConfig();
-  EXPECT_TRUE(config.contains_help_flags("zzz/usage_config_test.cc"));
-  EXPECT_TRUE(
-      config.contains_help_flags("bdir/a/zzz/usage_config_test-main.cc"));
-  EXPECT_TRUE(
-      config.contains_help_flags("//aqse/zzz/usage_config_test_main.cc"));
-  EXPECT_FALSE(config.contains_help_flags("zzz/aa/usage_config_main.cc"));
-
-  absl::FlagsUsageConfig empty_config;
-  empty_config.contains_help_flags = &TstContainsHelpFlags;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_TRUE(flags::GetUsageConfig().contains_help_flags("zzz/main-body.c"));
-  EXPECT_FALSE(
-      flags::GetUsageConfig().contains_help_flags("zzz/dir/main-body.c"));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagsUsageConfigTest, TestContainsHelppackageFlags) {
-  flags::SetProgramInvocationName("usage_config_test");
-
-  auto config = flags::GetUsageConfig();
-  EXPECT_TRUE(config.contains_helppackage_flags("aaa/usage_config_test.cc"));
-  EXPECT_TRUE(
-      config.contains_helppackage_flags("bbdir/aaa/usage_config_test-main.cc"));
-  EXPECT_TRUE(config.contains_helppackage_flags(
-      "//aqswde/aaa/usage_config_test_main.cc"));
-  EXPECT_FALSE(config.contains_helppackage_flags("aadir/usage_config_main.cc"));
-
-  absl::FlagsUsageConfig empty_config;
-  empty_config.contains_helppackage_flags = &TstContainsHelppackageFlags;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_TRUE(
-      flags::GetUsageConfig().contains_helppackage_flags("aaa/main-body.c"));
-  EXPECT_FALSE(
-      flags::GetUsageConfig().contains_helppackage_flags("aadir/main-body.c"));
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagsUsageConfigTest, TestVersionString) {
-  flags::SetProgramInvocationName("usage_config_test");
-
-#ifdef NDEBUG
-  std::string expected_output = "usage_config_test\n";
-#else
-  std::string expected_output =
-      "usage_config_test\nDebug build (NDEBUG not #defined)\n";
-#endif
-
-  EXPECT_EQ(flags::GetUsageConfig().version_string(), expected_output);
-
-  absl::FlagsUsageConfig empty_config;
-  empty_config.version_string = &TstVersionString;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_EQ(flags::GetUsageConfig().version_string(), "program 1.0.0");
-}
-
-// --------------------------------------------------------------------
-
-TEST_F(FlagsUsageConfigTest, TestNormalizeFilename) {
-  // This tests the default implementation.
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("a/a.cc"), "a/a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("/a/a.cc"), "a/a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("///a/a.cc"), "a/a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("/"), "");
-
-  // This tests that the custom implementation is called.
-  absl::FlagsUsageConfig empty_config;
-  empty_config.normalize_filename = &TstNormalizeFilename;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("a/a.cc"), "a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("aaa/a.cc"), "a/a.cc");
-
-  // This tests that the default implementation is called.
-  empty_config.normalize_filename = nullptr;
-  absl::SetFlagsUsageConfig(empty_config);
-
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("a/a.cc"), "a/a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("/a/a.cc"), "a/a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("///a/a.cc"), "a/a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("\\a\\a.cc"), "a\\a.cc");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("//"), "");
-  EXPECT_EQ(flags::GetUsageConfig().normalize_filename("\\\\"), "");
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/functional/BUILD.bazel b/third_party/abseil/absl/functional/BUILD.bazel
deleted file mode 100644
index ebd9b99..0000000
--- a/third_party/abseil/absl/functional/BUILD.bazel
+++ /dev/null
@@ -1,93 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "bind_front",
-    srcs = ["internal/front_binder.h"],
-    hdrs = ["bind_front.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:base_internal",
-        "//absl/container:compressed_tuple",
-        "//absl/meta:type_traits",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "bind_front_test",
-    srcs = ["bind_front_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bind_front",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "function_ref",
-    srcs = ["internal/function_ref.h"],
-    hdrs = ["function_ref.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:base_internal",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "function_ref_test",
-    size = "small",
-    srcs = ["function_ref_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":function_ref",
-        "//absl/container:test_instance_tracker",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "function_ref_benchmark",
-    srcs = [
-        "function_ref_benchmark.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":function_ref",
-        "//absl/base:core_headers",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
diff --git a/third_party/abseil/absl/functional/CMakeLists.txt b/third_party/abseil/absl/functional/CMakeLists.txt
deleted file mode 100644
index cda914f..0000000
--- a/third_party/abseil/absl/functional/CMakeLists.txt
+++ /dev/null
@@ -1,72 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    bind_front
-  SRCS
-    "internal/front_binder.h"
-  HDRS
-    "bind_front.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base_internal
-    absl::compressed_tuple
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    bind_front_test
-  SRCS
-    "bind_front_test.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bind_front
-    absl::memory
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    function_ref
-  SRCS
-    "internal/function_ref.h"
-  HDRS
-    "function_ref.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base_internal
-    absl::meta
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    function_ref_test
-  SRCS
-    "function_ref_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::function_ref
-    absl::memory
-    absl::test_instance_tracker
-    gmock_main
-)
diff --git a/third_party/abseil/absl/functional/bind_front.h b/third_party/abseil/absl/functional/bind_front.h
deleted file mode 100644
index 5b47970..0000000
--- a/third_party/abseil/absl/functional/bind_front.h
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: bind_front.h
-// -----------------------------------------------------------------------------
-//
-// `absl::bind_front()` returns a functor by binding a number of arguments to
-// the front of a provided (usually more generic) functor. Unlike `std::bind`,
-// it does not require the use of argument placeholders. The simpler syntax of
-// `absl::bind_front()` allows you to avoid known misuses with `std::bind()`.
-//
-// `absl::bind_front()` is meant as a drop-in replacement for C++20's upcoming
-// `std::bind_front()`, which similarly resolves these issues with
-// `std::bind()`. Both `bind_front()` alternatives, unlike `std::bind()`, allow
-// partial function application. (See
-// https://en.wikipedia.org/wiki/Partial_application).
-
-#ifndef ABSL_FUNCTIONAL_BIND_FRONT_H_
-#define ABSL_FUNCTIONAL_BIND_FRONT_H_
-
-#include "absl/functional/internal/front_binder.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// bind_front()
-//
-// Binds the first N arguments of an invocable object and stores them by value.
-//
-// Like `std::bind()`, `absl::bind_front()` is implicitly convertible to
-// `std::function`.  In particular, it may be used as a simpler replacement for
-// `std::bind()` in most cases, as it does not require  placeholders to be
-// specified. More importantly, it provides more reliable correctness guarantees
-// than `std::bind()`; while `std::bind()` will silently ignore passing more
-// parameters than expected, for example, `absl::bind_front()` will report such
-// mis-uses as errors.
-//
-// absl::bind_front(a...) can be seen as storing the results of
-// std::make_tuple(a...).
-//
-// Example: Binding a free function.
-//
-//   int Minus(int a, int b) { return a - b; }
-//
-//   assert(absl::bind_front(Minus)(3, 2) == 3 - 2);
-//   assert(absl::bind_front(Minus, 3)(2) == 3 - 2);
-//   assert(absl::bind_front(Minus, 3, 2)() == 3 - 2);
-//
-// Example: Binding a member function.
-//
-//   struct Math {
-//     int Double(int a) const { return 2 * a; }
-//   };
-//
-//   Math math;
-//
-//   assert(absl::bind_front(&Math::Double)(&math, 3) == 2 * 3);
-//   // Stores a pointer to math inside the functor.
-//   assert(absl::bind_front(&Math::Double, &math)(3) == 2 * 3);
-//   // Stores a copy of math inside the functor.
-//   assert(absl::bind_front(&Math::Double, math)(3) == 2 * 3);
-//   // Stores std::unique_ptr<Math> inside the functor.
-//   assert(absl::bind_front(&Math::Double,
-//                           std::unique_ptr<Math>(new Math))(3) == 2 * 3);
-//
-// Example: Using `absl::bind_front()`, instead of `std::bind()`, with
-//          `std::function`.
-//
-//   class FileReader {
-//    public:
-//     void ReadFileAsync(const std::string& filename, std::string* content,
-//                        const std::function<void()>& done) {
-//       // Calls Executor::Schedule(std::function<void()>).
-//       Executor::DefaultExecutor()->Schedule(
-//           absl::bind_front(&FileReader::BlockingRead, this,
-//                            filename, content, done));
-//     }
-//
-//    private:
-//     void BlockingRead(const std::string& filename, std::string* content,
-//                       const std::function<void()>& done) {
-//       CHECK_OK(file::GetContents(filename, content, {}));
-//       done();
-//     }
-//   };
-//
-// `absl::bind_front()` stores bound arguments explicitly using the type passed
-// rather than implicitly based on the type accepted by its functor.
-//
-// Example: Binding arguments explicitly.
-//
-//   void LogStringView(absl::string_view sv) {
-//     LOG(INFO) << sv;
-//   }
-//
-//   Executor* e = Executor::DefaultExecutor();
-//   std::string s = "hello";
-//   absl::string_view sv = s;
-//
-//   // absl::bind_front(LogStringView, arg) makes a copy of arg and stores it.
-//   e->Schedule(absl::bind_front(LogStringView, sv)); // ERROR: dangling
-//                                                     // string_view.
-//
-//   e->Schedule(absl::bind_front(LogStringView, s));  // OK: stores a copy of
-//                                                     // s.
-//
-// To store some of the arguments passed to `absl::bind_front()` by reference,
-//  use std::ref()` and `std::cref()`.
-//
-// Example: Storing some of the bound arguments by reference.
-//
-//   class Service {
-//    public:
-//     void Serve(const Request& req, std::function<void()>* done) {
-//       // The request protocol buffer won't be deleted until done is called.
-//       // It's safe to store a reference to it inside the functor.
-//       Executor::DefaultExecutor()->Schedule(
-//           absl::bind_front(&Service::BlockingServe, this, std::cref(req),
-//           done));
-//     }
-//
-//    private:
-//     void BlockingServe(const Request& req, std::function<void()>* done);
-//   };
-//
-// Example: Storing bound arguments by reference.
-//
-//   void Print(const std::string& a, const std::string& b) {
-//     std::cerr << a << b;
-//   }
-//
-//   std::string hi = "Hello, ";
-//   std::vector<std::string> names = {"Chuk", "Gek"};
-//   // Doesn't copy hi.
-//   for_each(names.begin(), names.end(),
-//            absl::bind_front(Print, std::ref(hi)));
-//
-//   // DO NOT DO THIS: the functor may outlive "hi", resulting in
-//   // dangling references.
-//   foo->DoInFuture(absl::bind_front(Print, std::ref(hi), "Guest"));  // BAD!
-//   auto f = absl::bind_front(Print, std::ref(hi), "Guest"); // BAD!
-//
-// Example: Storing reference-like types.
-//
-//   void Print(absl::string_view a, const std::string& b) {
-//     std::cerr << a << b;
-//   }
-//
-//   std::string hi = "Hello, ";
-//   // Copies "hi".
-//   absl::bind_front(Print, hi)("Chuk");
-//
-//   // Compile error: std::reference_wrapper<const string> is not implicitly
-//   // convertible to string_view.
-//   // absl::bind_front(Print, std::cref(hi))("Chuk");
-//
-//   // Doesn't copy "hi".
-//   absl::bind_front(Print, absl::string_view(hi))("Chuk");
-//
-template <class F, class... BoundArgs>
-constexpr functional_internal::bind_front_t<F, BoundArgs...> bind_front(
-    F&& func, BoundArgs&&... args) {
-  return functional_internal::bind_front_t<F, BoundArgs...>(
-      absl::in_place, absl::forward<F>(func),
-      absl::forward<BoundArgs>(args)...);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FUNCTIONAL_BIND_FRONT_H_
diff --git a/third_party/abseil/absl/functional/bind_front_test.cc b/third_party/abseil/absl/functional/bind_front_test.cc
deleted file mode 100644
index 4801a81..0000000
--- a/third_party/abseil/absl/functional/bind_front_test.cc
+++ /dev/null
@@ -1,231 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/functional/bind_front.h"
-
-#include <stddef.h>
-
-#include <functional>
-#include <memory>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/memory/memory.h"
-
-namespace {
-
-char CharAt(const char* s, size_t index) { return s[index]; }
-
-TEST(BindTest, Basics) {
-  EXPECT_EQ('C', absl::bind_front(CharAt)("ABC", 2));
-  EXPECT_EQ('C', absl::bind_front(CharAt, "ABC")(2));
-  EXPECT_EQ('C', absl::bind_front(CharAt, "ABC", 2)());
-}
-
-TEST(BindTest, Lambda) {
-  auto lambda = [](int x, int y, int z) { return x + y + z; };
-  EXPECT_EQ(6, absl::bind_front(lambda)(1, 2, 3));
-  EXPECT_EQ(6, absl::bind_front(lambda, 1)(2, 3));
-  EXPECT_EQ(6, absl::bind_front(lambda, 1, 2)(3));
-  EXPECT_EQ(6, absl::bind_front(lambda, 1, 2, 3)());
-}
-
-struct Functor {
-  std::string operator()() & { return "&"; }
-  std::string operator()() const& { return "const&"; }
-  std::string operator()() && { return "&&"; }
-  std::string operator()() const&& { return "const&&"; }
-};
-
-TEST(BindTest, PerfectForwardingOfBoundArgs) {
-  auto f = absl::bind_front(Functor());
-  const auto& cf = f;
-  EXPECT_EQ("&", f());
-  EXPECT_EQ("const&", cf());
-  EXPECT_EQ("&&", std::move(f)());
-  EXPECT_EQ("const&&", std::move(cf)());
-}
-
-struct ArgDescribe {
-  std::string operator()(int&) const { return "&"; }             // NOLINT
-  std::string operator()(const int&) const { return "const&"; }  // NOLINT
-  std::string operator()(int&&) const { return "&&"; }
-  std::string operator()(const int&&) const { return "const&&"; }
-};
-
-TEST(BindTest, PerfectForwardingOfFreeArgs) {
-  ArgDescribe f;
-  int i;
-  EXPECT_EQ("&", absl::bind_front(f)(static_cast<int&>(i)));
-  EXPECT_EQ("const&", absl::bind_front(f)(static_cast<const int&>(i)));
-  EXPECT_EQ("&&", absl::bind_front(f)(static_cast<int&&>(i)));
-  EXPECT_EQ("const&&", absl::bind_front(f)(static_cast<const int&&>(i)));
-}
-
-struct NonCopyableFunctor {
-  NonCopyableFunctor() = default;
-  NonCopyableFunctor(const NonCopyableFunctor&) = delete;
-  NonCopyableFunctor& operator=(const NonCopyableFunctor&) = delete;
-  const NonCopyableFunctor* operator()() const { return this; }
-};
-
-TEST(BindTest, RefToFunctor) {
-  // It won't copy/move the functor and use the original object.
-  NonCopyableFunctor ncf;
-  auto bound_ncf = absl::bind_front(std::ref(ncf));
-  auto bound_ncf_copy = bound_ncf;
-  EXPECT_EQ(&ncf, bound_ncf_copy());
-}
-
-struct Struct {
-  std::string value;
-};
-
-TEST(BindTest, StoreByCopy) {
-  Struct s = {"hello"};
-  auto f = absl::bind_front(&Struct::value, s);
-  auto g = f;
-  EXPECT_EQ("hello", f());
-  EXPECT_EQ("hello", g());
-  EXPECT_NE(&s.value, &f());
-  EXPECT_NE(&s.value, &g());
-  EXPECT_NE(&g(), &f());
-}
-
-struct NonCopyable {
-  explicit NonCopyable(const std::string& s) : value(s) {}
-  NonCopyable(const NonCopyable&) = delete;
-  NonCopyable& operator=(const NonCopyable&) = delete;
-
-  std::string value;
-};
-
-const std::string& GetNonCopyableValue(const NonCopyable& n) { return n.value; }
-
-TEST(BindTest, StoreByRef) {
-  NonCopyable s("hello");
-  auto f = absl::bind_front(&GetNonCopyableValue, std::ref(s));
-  EXPECT_EQ("hello", f());
-  EXPECT_EQ(&s.value, &f());
-  auto g = std::move(f);  // NOLINT
-  EXPECT_EQ("hello", g());
-  EXPECT_EQ(&s.value, &g());
-  s.value = "goodbye";
-  EXPECT_EQ("goodbye", g());
-}
-
-TEST(BindTest, StoreByCRef) {
-  NonCopyable s("hello");
-  auto f = absl::bind_front(&GetNonCopyableValue, std::cref(s));
-  EXPECT_EQ("hello", f());
-  EXPECT_EQ(&s.value, &f());
-  auto g = std::move(f);  // NOLINT
-  EXPECT_EQ("hello", g());
-  EXPECT_EQ(&s.value, &g());
-  s.value = "goodbye";
-  EXPECT_EQ("goodbye", g());
-}
-
-const std::string& GetNonCopyableValueByWrapper(
-    std::reference_wrapper<NonCopyable> n) {
-  return n.get().value;
-}
-
-TEST(BindTest, StoreByRefInvokeByWrapper) {
-  NonCopyable s("hello");
-  auto f = absl::bind_front(GetNonCopyableValueByWrapper, std::ref(s));
-  EXPECT_EQ("hello", f());
-  EXPECT_EQ(&s.value, &f());
-  auto g = std::move(f);
-  EXPECT_EQ("hello", g());
-  EXPECT_EQ(&s.value, &g());
-  s.value = "goodbye";
-  EXPECT_EQ("goodbye", g());
-}
-
-TEST(BindTest, StoreByPointer) {
-  NonCopyable s("hello");
-  auto f = absl::bind_front(&NonCopyable::value, &s);
-  EXPECT_EQ("hello", f());
-  EXPECT_EQ(&s.value, &f());
-  auto g = std::move(f);
-  EXPECT_EQ("hello", g());
-  EXPECT_EQ(&s.value, &g());
-}
-
-int Sink(std::unique_ptr<int> p) {
-  return *p;
-}
-
-std::unique_ptr<int> Factory(int n) { return absl::make_unique<int>(n); }
-
-TEST(BindTest, NonCopyableArg) {
-  EXPECT_EQ(42, absl::bind_front(Sink)(absl::make_unique<int>(42)));
-  EXPECT_EQ(42, absl::bind_front(Sink, absl::make_unique<int>(42))());
-}
-
-TEST(BindTest, NonCopyableResult) {
-  EXPECT_THAT(absl::bind_front(Factory)(42), ::testing::Pointee(42));
-  EXPECT_THAT(absl::bind_front(Factory, 42)(), ::testing::Pointee(42));
-}
-
-// is_copy_constructible<FalseCopyable<unique_ptr<T>> is true but an attempt to
-// instantiate the copy constructor leads to a compile error. This is similar
-// to how standard containers behave.
-template <class T>
-struct FalseCopyable {
-  FalseCopyable() {}
-  FalseCopyable(const FalseCopyable& other) : m(other.m) {}
-  FalseCopyable(FalseCopyable&& other) : m(std::move(other.m)) {}
-  T m;
-};
-
-int GetMember(FalseCopyable<std::unique_ptr<int>> x) { return *x.m; }
-
-TEST(BindTest, WrappedMoveOnly) {
-  FalseCopyable<std::unique_ptr<int>> x;
-  x.m = absl::make_unique<int>(42);
-  auto f = absl::bind_front(&GetMember, std::move(x));
-  EXPECT_EQ(42, std::move(f)());
-}
-
-int Plus(int a, int b) { return a + b; }
-
-TEST(BindTest, ConstExpr) {
-  constexpr auto f = absl::bind_front(CharAt);
-  EXPECT_EQ(f("ABC", 1), 'B');
-  static constexpr int five = 5;
-  constexpr auto plus5 = absl::bind_front(Plus, five);
-  EXPECT_EQ(plus5(1), 6);
-
-  // There seems to be a bug in MSVC dealing constexpr construction of
-  // char[]. Notice 'plus5' above; 'int' works just fine.
-#if !(defined(_MSC_VER) && _MSC_VER < 1910)
-  static constexpr char data[] = "DEF";
-  constexpr auto g = absl::bind_front(CharAt, data);
-  EXPECT_EQ(g(1), 'E');
-#endif
-}
-
-struct ManglingCall {
-  int operator()(int, double, std::string) const { return 0; }
-};
-
-TEST(BindTest, Mangling) {
-  // We just want to generate a particular instantiation to see its mangling.
-  absl::bind_front(ManglingCall{}, 1, 3.3)("A");
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/functional/function_ref.h b/third_party/abseil/absl/functional/function_ref.h
deleted file mode 100644
index 5790a65..0000000
--- a/third_party/abseil/absl/functional/function_ref.h
+++ /dev/null
@@ -1,140 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: function_ref.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::FunctionRef` type for holding a
-// non-owning reference to an object of any invocable type. This function
-// reference is typically most useful as a type-erased argument type for
-// accepting function types that neither take ownership nor copy the type; using
-// the reference type in this case avoids a copy and an allocation. Best
-// practices of other non-owning reference-like objects (such as
-// `absl::string_view`) apply here.
-//
-//  An `absl::FunctionRef` is similar in usage to a `std::function` but has the
-//  following differences:
-//
-//  * It doesn't own the underlying object.
-//  * It doesn't have a null or empty state.
-//  * It never performs deep copies or allocations.
-//  * It's much faster and cheaper to construct.
-//  * It's trivially copyable and destructable.
-//
-// Generally, `absl::FunctionRef` should not be used as a return value, data
-// member, or to initialize a `std::function`. Such usages will often lead to
-// problematic lifetime issues. Once you convert something to an
-// `absl::FunctionRef` you cannot make a deep copy later.
-//
-// This class is suitable for use wherever a "const std::function<>&"
-// would be used without making a copy. ForEach functions and other versions of
-// the visitor pattern are a good example of when this class should be used.
-//
-// This class is trivial to copy and should be passed by value.
-#ifndef ABSL_FUNCTIONAL_FUNCTION_REF_H_
-#define ABSL_FUNCTIONAL_FUNCTION_REF_H_
-
-#include <cassert>
-#include <functional>
-#include <type_traits>
-
-#include "absl/functional/internal/function_ref.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// FunctionRef
-//
-// Dummy class declaration to allow the partial specialization based on function
-// types below.
-template <typename T>
-class FunctionRef;
-
-// FunctionRef
-//
-// An `absl::FunctionRef` is a lightweight wrapper to any invokable object with
-// a compatible signature. Generally, an `absl::FunctionRef` should only be used
-// as an argument type and should be preferred as an argument over a const
-// reference to a `std::function`.
-//
-// Example:
-//
-//   // The following function takes a function callback by const reference
-//   bool Visitor(const std::function<void(my_proto&,
-//                                         absl::string_view)>& callback);
-//
-//   // Assuming that the function is not stored or otherwise copied, it can be
-//   // replaced by an `absl::FunctionRef`:
-//   bool Visitor(absl::FunctionRef<void(my_proto&, absl::string_view)>
-//                  callback);
-//
-// Note: the assignment operator within an `absl::FunctionRef` is intentionally
-// deleted to prevent misuse; because the `absl::FunctionRef` does not own the
-// underlying type, assignment likely indicates misuse.
-template <typename R, typename... Args>
-class FunctionRef<R(Args...)> {
- private:
-  // Used to disable constructors for objects that are not compatible with the
-  // signature of this FunctionRef.
-  template <typename F,
-            typename FR = absl::base_internal::invoke_result_t<F, Args&&...>>
-  using EnableIfCompatible =
-      typename std::enable_if<std::is_void<R>::value ||
-                              std::is_convertible<FR, R>::value>::type;
-
- public:
-  // Constructs a FunctionRef from any invokable type.
-  template <typename F, typename = EnableIfCompatible<const F&>>
-  FunctionRef(const F& f)  // NOLINT(runtime/explicit)
-      : invoker_(&absl::functional_internal::InvokeObject<F, R, Args...>) {
-    absl::functional_internal::AssertNonNull(f);
-    ptr_.obj = &f;
-  }
-
-  // Overload for function pointers. This eliminates a level of indirection that
-  // would happen if the above overload was used (it lets us store the pointer
-  // instead of a pointer to a pointer).
-  //
-  // This overload is also used for references to functions, since references to
-  // functions can decay to function pointers implicitly.
-  template <
-      typename F, typename = EnableIfCompatible<F*>,
-      absl::functional_internal::EnableIf<absl::is_function<F>::value> = 0>
-  FunctionRef(F* f)  // NOLINT(runtime/explicit)
-      : invoker_(&absl::functional_internal::InvokeFunction<F*, R, Args...>) {
-    assert(f != nullptr);
-    ptr_.fun = reinterpret_cast<decltype(ptr_.fun)>(f);
-  }
-
-  // To help prevent subtle lifetime bugs, FunctionRef is not assignable.
-  // Typically, it should only be used as an argument type.
-  FunctionRef& operator=(const FunctionRef& rhs) = delete;
-  FunctionRef(const FunctionRef& rhs) = default;
-
-  // Call the underlying object.
-  R operator()(Args... args) const {
-    return invoker_(ptr_, std::forward<Args>(args)...);
-  }
-
- private:
-  absl::functional_internal::VoidPtr ptr_;
-  absl::functional_internal::Invoker<R, Args...> invoker_;
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FUNCTIONAL_FUNCTION_REF_H_
diff --git a/third_party/abseil/absl/functional/function_ref_benchmark.cc b/third_party/abseil/absl/functional/function_ref_benchmark.cc
deleted file mode 100644
index 045305b..0000000
--- a/third_party/abseil/absl/functional/function_ref_benchmark.cc
+++ /dev/null
@@ -1,142 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/functional/function_ref.h"
-
-#include <memory>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/attributes.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-int dummy = 0;
-
-void FreeFunction() { benchmark::DoNotOptimize(dummy); }
-
-struct TrivialFunctor {
-  void operator()() const { benchmark::DoNotOptimize(dummy); }
-};
-
-struct LargeFunctor {
-  void operator()() const { benchmark::DoNotOptimize(this); }
-  std::string a, b, c;
-};
-
-template <typename Function, typename... Args>
-void ABSL_ATTRIBUTE_NOINLINE CallFunction(Function f, Args&&... args) {
-  f(std::forward<Args>(args)...);
-}
-
-template <typename Function, typename Callable, typename... Args>
-void ConstructAndCallFunctionBenchmark(benchmark::State& state,
-                                       const Callable& c, Args&&... args) {
-  for (auto _ : state) {
-    CallFunction<Function>(c, std::forward<Args>(args)...);
-  }
-}
-
-void BM_TrivialStdFunction(benchmark::State& state) {
-  ConstructAndCallFunctionBenchmark<std::function<void()>>(state,
-                                                           TrivialFunctor{});
-}
-BENCHMARK(BM_TrivialStdFunction);
-
-void BM_TrivialFunctionRef(benchmark::State& state) {
-  ConstructAndCallFunctionBenchmark<FunctionRef<void()>>(state,
-                                                         TrivialFunctor{});
-}
-BENCHMARK(BM_TrivialFunctionRef);
-
-void BM_LargeStdFunction(benchmark::State& state) {
-  ConstructAndCallFunctionBenchmark<std::function<void()>>(state,
-                                                           LargeFunctor{});
-}
-BENCHMARK(BM_LargeStdFunction);
-
-void BM_LargeFunctionRef(benchmark::State& state) {
-  ConstructAndCallFunctionBenchmark<FunctionRef<void()>>(state, LargeFunctor{});
-}
-BENCHMARK(BM_LargeFunctionRef);
-
-void BM_FunPtrStdFunction(benchmark::State& state) {
-  ConstructAndCallFunctionBenchmark<std::function<void()>>(state, FreeFunction);
-}
-BENCHMARK(BM_FunPtrStdFunction);
-
-void BM_FunPtrFunctionRef(benchmark::State& state) {
-  ConstructAndCallFunctionBenchmark<FunctionRef<void()>>(state, FreeFunction);
-}
-BENCHMARK(BM_FunPtrFunctionRef);
-
-// Doesn't include construction or copy overhead in the loop.
-template <typename Function, typename Callable, typename... Args>
-void CallFunctionBenchmark(benchmark::State& state, const Callable& c,
-                           Args... args) {
-  Function f = c;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(&f);
-    f(args...);
-  }
-}
-
-struct FunctorWithTrivialArgs {
-  void operator()(int a, int b, int c) const {
-    benchmark::DoNotOptimize(a);
-    benchmark::DoNotOptimize(b);
-    benchmark::DoNotOptimize(c);
-  }
-};
-
-void BM_TrivialArgsStdFunction(benchmark::State& state) {
-  CallFunctionBenchmark<std::function<void(int, int, int)>>(
-      state, FunctorWithTrivialArgs{}, 1, 2, 3);
-}
-BENCHMARK(BM_TrivialArgsStdFunction);
-
-void BM_TrivialArgsFunctionRef(benchmark::State& state) {
-  CallFunctionBenchmark<FunctionRef<void(int, int, int)>>(
-      state, FunctorWithTrivialArgs{}, 1, 2, 3);
-}
-BENCHMARK(BM_TrivialArgsFunctionRef);
-
-struct FunctorWithNonTrivialArgs {
-  void operator()(std::string a, std::string b, std::string c) const {
-    benchmark::DoNotOptimize(&a);
-    benchmark::DoNotOptimize(&b);
-    benchmark::DoNotOptimize(&c);
-  }
-};
-
-void BM_NonTrivialArgsStdFunction(benchmark::State& state) {
-  std::string a, b, c;
-  CallFunctionBenchmark<
-      std::function<void(std::string, std::string, std::string)>>(
-      state, FunctorWithNonTrivialArgs{}, a, b, c);
-}
-BENCHMARK(BM_NonTrivialArgsStdFunction);
-
-void BM_NonTrivialArgsFunctionRef(benchmark::State& state) {
-  std::string a, b, c;
-  CallFunctionBenchmark<
-      FunctionRef<void(std::string, std::string, std::string)>>(
-      state, FunctorWithNonTrivialArgs{}, a, b, c);
-}
-BENCHMARK(BM_NonTrivialArgsFunctionRef);
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/functional/function_ref_test.cc b/third_party/abseil/absl/functional/function_ref_test.cc
deleted file mode 100644
index 3aa5974..0000000
--- a/third_party/abseil/absl/functional/function_ref_test.cc
+++ /dev/null
@@ -1,257 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/functional/function_ref.h"
-
-#include <memory>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/internal/test_instance_tracker.h"
-#include "absl/memory/memory.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-void RunFun(FunctionRef<void()> f) { f(); }
-
-TEST(FunctionRefTest, Lambda) {
-  bool ran = false;
-  RunFun([&] { ran = true; });
-  EXPECT_TRUE(ran);
-}
-
-int Function() { return 1337; }
-
-TEST(FunctionRefTest, Function1) {
-  FunctionRef<int()> ref(&Function);
-  EXPECT_EQ(1337, ref());
-}
-
-TEST(FunctionRefTest, Function2) {
-  FunctionRef<int()> ref(Function);
-  EXPECT_EQ(1337, ref());
-}
-
-int NoExceptFunction() noexcept { return 1337; }
-
-// TODO(jdennett): Add a test for noexcept member functions.
-TEST(FunctionRefTest, NoExceptFunction) {
-  FunctionRef<int()> ref(NoExceptFunction);
-  EXPECT_EQ(1337, ref());
-}
-
-TEST(FunctionRefTest, ForwardsArgs) {
-  auto l = [](std::unique_ptr<int> i) { return *i; };
-  FunctionRef<int(std::unique_ptr<int>)> ref(l);
-  EXPECT_EQ(42, ref(absl::make_unique<int>(42)));
-}
-
-TEST(FunctionRef, ReturnMoveOnly) {
-  auto l = [] { return absl::make_unique<int>(29); };
-  FunctionRef<std::unique_ptr<int>()> ref(l);
-  EXPECT_EQ(29, *ref());
-}
-
-TEST(FunctionRef, ManyArgs) {
-  auto l = [](int a, int b, int c) { return a + b + c; };
-  FunctionRef<int(int, int, int)> ref(l);
-  EXPECT_EQ(6, ref(1, 2, 3));
-}
-
-TEST(FunctionRef, VoidResultFromNonVoidFunctor) {
-  bool ran = false;
-  auto l = [&]() -> int {
-    ran = true;
-    return 2;
-  };
-  FunctionRef<void()> ref(l);
-  ref();
-  EXPECT_TRUE(ran);
-}
-
-TEST(FunctionRef, CastFromDerived) {
-  struct Base {};
-  struct Derived : public Base {};
-
-  Derived d;
-  auto l1 = [&](Base* b) { EXPECT_EQ(&d, b); };
-  FunctionRef<void(Derived*)> ref1(l1);
-  ref1(&d);
-
-  auto l2 = [&]() -> Derived* { return &d; };
-  FunctionRef<Base*()> ref2(l2);
-  EXPECT_EQ(&d, ref2());
-}
-
-TEST(FunctionRef, VoidResultFromNonVoidFuncton) {
-  FunctionRef<void()> ref(Function);
-  ref();
-}
-
-TEST(FunctionRef, MemberPtr) {
-  struct S {
-    int i;
-  };
-
-  S s{1100111};
-  auto mem_ptr = &S::i;
-  FunctionRef<int(const S& s)> ref(mem_ptr);
-  EXPECT_EQ(1100111, ref(s));
-}
-
-TEST(FunctionRef, MemberFun) {
-  struct S {
-    int i;
-    int get_i() const { return i; }
-  };
-
-  S s{22};
-  auto mem_fun_ptr = &S::get_i;
-  FunctionRef<int(const S& s)> ref(mem_fun_ptr);
-  EXPECT_EQ(22, ref(s));
-}
-
-TEST(FunctionRef, MemberFunRefqualified) {
-  struct S {
-    int i;
-    int get_i() && { return i; }
-  };
-  auto mem_fun_ptr = &S::get_i;
-  S s{22};
-  FunctionRef<int(S && s)> ref(mem_fun_ptr);
-  EXPECT_EQ(22, ref(std::move(s)));
-}
-
-#if !defined(_WIN32) && defined(GTEST_HAS_DEATH_TEST)
-
-TEST(FunctionRef, MemberFunRefqualifiedNull) {
-  struct S {
-    int i;
-    int get_i() && { return i; }
-  };
-  auto mem_fun_ptr = &S::get_i;
-  mem_fun_ptr = nullptr;
-  EXPECT_DEBUG_DEATH({ FunctionRef<int(S && s)> ref(mem_fun_ptr); }, "");
-}
-
-TEST(FunctionRef, NullMemberPtrAssertFails) {
-  struct S {
-    int i;
-  };
-  using MemberPtr = int S::*;
-  MemberPtr mem_ptr = nullptr;
-  EXPECT_DEBUG_DEATH({ FunctionRef<int(const S& s)> ref(mem_ptr); }, "");
-}
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-TEST(FunctionRef, CopiesAndMovesPerPassByValue) {
-  absl::test_internal::InstanceTracker tracker;
-  absl::test_internal::CopyableMovableInstance instance(0);
-  auto l = [](absl::test_internal::CopyableMovableInstance) {};
-  FunctionRef<void(absl::test_internal::CopyableMovableInstance)> ref(l);
-  ref(instance);
-  EXPECT_EQ(tracker.copies(), 1);
-  EXPECT_EQ(tracker.moves(), 1);
-}
-
-TEST(FunctionRef, CopiesAndMovesPerPassByRef) {
-  absl::test_internal::InstanceTracker tracker;
-  absl::test_internal::CopyableMovableInstance instance(0);
-  auto l = [](const absl::test_internal::CopyableMovableInstance&) {};
-  FunctionRef<void(const absl::test_internal::CopyableMovableInstance&)> ref(l);
-  ref(instance);
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 0);
-}
-
-TEST(FunctionRef, CopiesAndMovesPerPassByValueCallByMove) {
-  absl::test_internal::InstanceTracker tracker;
-  absl::test_internal::CopyableMovableInstance instance(0);
-  auto l = [](absl::test_internal::CopyableMovableInstance) {};
-  FunctionRef<void(absl::test_internal::CopyableMovableInstance)> ref(l);
-  ref(std::move(instance));
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 2);
-}
-
-TEST(FunctionRef, CopiesAndMovesPerPassByValueToRef) {
-  absl::test_internal::InstanceTracker tracker;
-  absl::test_internal::CopyableMovableInstance instance(0);
-  auto l = [](const absl::test_internal::CopyableMovableInstance&) {};
-  FunctionRef<void(absl::test_internal::CopyableMovableInstance)> ref(l);
-  ref(std::move(instance));
-  EXPECT_EQ(tracker.copies(), 0);
-  EXPECT_EQ(tracker.moves(), 1);
-}
-
-TEST(FunctionRef, PassByValueTypes) {
-  using absl::functional_internal::Invoker;
-  using absl::functional_internal::VoidPtr;
-  using absl::test_internal::CopyableMovableInstance;
-  struct Trivial {
-    void* p[2];
-  };
-  struct LargeTrivial {
-    void* p[3];
-  };
-
-  static_assert(std::is_same<Invoker<void, int>, void (*)(VoidPtr, int)>::value,
-                "Scalar types should be passed by value");
-  static_assert(
-      std::is_same<Invoker<void, Trivial>, void (*)(VoidPtr, Trivial)>::value,
-      "Small trivial types should be passed by value");
-  static_assert(std::is_same<Invoker<void, LargeTrivial>,
-                             void (*)(VoidPtr, LargeTrivial &&)>::value,
-                "Large trivial types should be passed by rvalue reference");
-  static_assert(
-      std::is_same<Invoker<void, CopyableMovableInstance>,
-                   void (*)(VoidPtr, CopyableMovableInstance &&)>::value,
-      "Types with copy/move ctor should be passed by rvalue reference");
-
-  // References are passed as references.
-  static_assert(
-      std::is_same<Invoker<void, int&>, void (*)(VoidPtr, int&)>::value,
-      "Reference types should be preserved");
-  static_assert(
-      std::is_same<Invoker<void, CopyableMovableInstance&>,
-                   void (*)(VoidPtr, CopyableMovableInstance&)>::value,
-      "Reference types should be preserved");
-  static_assert(
-      std::is_same<Invoker<void, CopyableMovableInstance&&>,
-                   void (*)(VoidPtr, CopyableMovableInstance &&)>::value,
-      "Reference types should be preserved");
-
-  // Make sure the address of an object received by reference is the same as the
-  // addess of the object passed by the caller.
-  {
-    LargeTrivial obj;
-    auto test = [&obj](LargeTrivial& input) { ASSERT_EQ(&input, &obj); };
-    absl::FunctionRef<void(LargeTrivial&)> ref(test);
-    ref(obj);
-  }
-
-  {
-    Trivial obj;
-    auto test = [&obj](Trivial& input) { ASSERT_EQ(&input, &obj); };
-    absl::FunctionRef<void(Trivial&)> ref(test);
-    ref(obj);
-  }
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/functional/internal/front_binder.h b/third_party/abseil/absl/functional/internal/front_binder.h
deleted file mode 100644
index 45f52de..0000000
--- a/third_party/abseil/absl/functional/internal/front_binder.h
+++ /dev/null
@@ -1,95 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Implementation details for `absl::bind_front()`.
-
-#ifndef ABSL_FUNCTIONAL_INTERNAL_FRONT_BINDER_H_
-#define ABSL_FUNCTIONAL_INTERNAL_FRONT_BINDER_H_
-
-#include <cstddef>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/invoke.h"
-#include "absl/container/internal/compressed_tuple.h"
-#include "absl/meta/type_traits.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace functional_internal {
-
-// Invoke the method, expanding the tuple of bound arguments.
-template <class R, class Tuple, size_t... Idx, class... Args>
-R Apply(Tuple&& bound, absl::index_sequence<Idx...>, Args&&... free) {
-  return base_internal::invoke(
-      absl::forward<Tuple>(bound).template get<Idx>()...,
-      absl::forward<Args>(free)...);
-}
-
-template <class F, class... BoundArgs>
-class FrontBinder {
-  using BoundArgsT = absl::container_internal::CompressedTuple<F, BoundArgs...>;
-  using Idx = absl::make_index_sequence<sizeof...(BoundArgs) + 1>;
-
-  BoundArgsT bound_args_;
-
- public:
-  template <class... Ts>
-  constexpr explicit FrontBinder(absl::in_place_t, Ts&&... ts)
-      : bound_args_(absl::forward<Ts>(ts)...) {}
-
-  template <class... FreeArgs, class R = base_internal::invoke_result_t<
-                                   F&, BoundArgs&..., FreeArgs&&...>>
-  R operator()(FreeArgs&&... free_args) & {
-    return functional_internal::Apply<R>(bound_args_, Idx(),
-                                         absl::forward<FreeArgs>(free_args)...);
-  }
-
-  template <class... FreeArgs,
-            class R = base_internal::invoke_result_t<
-                const F&, const BoundArgs&..., FreeArgs&&...>>
-  R operator()(FreeArgs&&... free_args) const& {
-    return functional_internal::Apply<R>(bound_args_, Idx(),
-                                         absl::forward<FreeArgs>(free_args)...);
-  }
-
-  template <class... FreeArgs, class R = base_internal::invoke_result_t<
-                                   F&&, BoundArgs&&..., FreeArgs&&...>>
-  R operator()(FreeArgs&&... free_args) && {
-    // This overload is called when *this is an rvalue. If some of the bound
-    // arguments are stored by value or rvalue reference, we move them.
-    return functional_internal::Apply<R>(absl::move(bound_args_), Idx(),
-                                         absl::forward<FreeArgs>(free_args)...);
-  }
-
-  template <class... FreeArgs,
-            class R = base_internal::invoke_result_t<
-                const F&&, const BoundArgs&&..., FreeArgs&&...>>
-  R operator()(FreeArgs&&... free_args) const&& {
-    // This overload is called when *this is an rvalue. If some of the bound
-    // arguments are stored by value or rvalue reference, we move them.
-    return functional_internal::Apply<R>(absl::move(bound_args_), Idx(),
-                                         absl::forward<FreeArgs>(free_args)...);
-  }
-};
-
-template <class F, class... BoundArgs>
-using bind_front_t = FrontBinder<decay_t<F>, absl::decay_t<BoundArgs>...>;
-
-}  // namespace functional_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FUNCTIONAL_INTERNAL_FRONT_BINDER_H_
diff --git a/third_party/abseil/absl/functional/internal/function_ref.h b/third_party/abseil/absl/functional/internal/function_ref.h
deleted file mode 100644
index b5bb8b4..0000000
--- a/third_party/abseil/absl/functional/internal/function_ref.h
+++ /dev/null
@@ -1,106 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
-#define ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
-
-#include <cassert>
-#include <functional>
-#include <type_traits>
-
-#include "absl/base/internal/invoke.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace functional_internal {
-
-// Like a void* that can handle function pointers as well. The standard does not
-// allow function pointers to round-trip through void*, but void(*)() is fine.
-//
-// Note: It's important that this class remains trivial and is the same size as
-// a pointer, since this allows the compiler to perform tail-call optimizations
-// when the underlying function is a callable object with a matching signature.
-union VoidPtr {
-  const void* obj;
-  void (*fun)();
-};
-
-// Chooses the best type for passing T as an argument.
-// Attempt to be close to SystemV AMD64 ABI. Objects with trivial copy ctor are
-// passed by value.
-template <typename T>
-constexpr bool PassByValue() {
-  return !std::is_lvalue_reference<T>::value &&
-         absl::is_trivially_copy_constructible<T>::value &&
-         absl::is_trivially_copy_assignable<
-             typename std::remove_cv<T>::type>::value &&
-         std::is_trivially_destructible<T>::value &&
-         sizeof(T) <= 2 * sizeof(void*);
-}
-
-template <typename T>
-struct ForwardT : std::conditional<PassByValue<T>(), T, T&&> {};
-
-// An Invoker takes a pointer to the type-erased invokable object, followed by
-// the arguments that the invokable object expects.
-//
-// Note: The order of arguments here is an optimization, since member functions
-// have an implicit "this" pointer as their first argument, putting VoidPtr
-// first allows the compiler to perform tail-call optimization in many cases.
-template <typename R, typename... Args>
-using Invoker = R (*)(VoidPtr, typename ForwardT<Args>::type...);
-
-//
-// InvokeObject and InvokeFunction provide static "Invoke" functions that can be
-// used as Invokers for objects or functions respectively.
-//
-// static_cast<R> handles the case the return type is void.
-template <typename Obj, typename R, typename... Args>
-R InvokeObject(VoidPtr ptr, typename ForwardT<Args>::type... args) {
-  auto o = static_cast<const Obj*>(ptr.obj);
-  return static_cast<R>(
-      absl::base_internal::invoke(*o, std::forward<Args>(args)...));
-}
-
-template <typename Fun, typename R, typename... Args>
-R InvokeFunction(VoidPtr ptr, typename ForwardT<Args>::type... args) {
-  auto f = reinterpret_cast<Fun>(ptr.fun);
-  return static_cast<R>(
-      absl::base_internal::invoke(f, std::forward<Args>(args)...));
-}
-
-template <typename Sig>
-void AssertNonNull(const std::function<Sig>& f) {
-  assert(f != nullptr);
-  (void)f;
-}
-
-template <typename F>
-void AssertNonNull(const F&) {}
-
-template <typename F, typename C>
-void AssertNonNull(F C::*f) {
-  assert(f != nullptr);
-  (void)f;
-}
-
-template <bool C>
-using EnableIf = typename ::std::enable_if<C, int>::type;
-
-}  // namespace functional_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_FUNCTIONAL_INTERNAL_FUNCTION_REF_H_
diff --git a/third_party/abseil/absl/hash/BUILD.bazel b/third_party/abseil/absl/hash/BUILD.bazel
deleted file mode 100644
index 90c6c8a..0000000
--- a/third_party/abseil/absl/hash/BUILD.bazel
+++ /dev/null
@@ -1,169 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "hash",
-    srcs = [
-        "internal/hash.cc",
-        "internal/hash.h",
-    ],
-    hdrs = ["hash.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":city",
-        ":wyhash",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/container:fixed_array",
-        "//absl/meta:type_traits",
-        "//absl/numeric:int128",
-        "//absl/strings",
-        "//absl/types:optional",
-        "//absl/types:variant",
-        "//absl/utility",
-    ],
-)
-
-cc_library(
-    name = "hash_testing",
-    testonly = 1,
-    hdrs = ["hash_testing.h"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":spy_hash_state",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/types:variant",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "hash_test",
-    srcs = ["hash_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":hash",
-        ":hash_testing",
-        ":spy_hash_state",
-        "//absl/base:core_headers",
-        "//absl/container:flat_hash_set",
-        "//absl/meta:type_traits",
-        "//absl/numeric:int128",
-        "//absl/strings:cord_test_helpers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_binary(
-    name = "hash_benchmark",
-    testonly = 1,
-    srcs = ["hash_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":hash",
-        "//absl/base:core_headers",
-        "//absl/random",
-        "//absl/strings",
-        "//absl/strings:cord",
-        "//absl/strings:cord_test_helpers",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "spy_hash_state",
-    testonly = 1,
-    hdrs = ["internal/spy_hash_state.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":hash",
-        "//absl/strings",
-        "//absl/strings:str_format",
-    ],
-)
-
-cc_library(
-    name = "city",
-    srcs = ["internal/city.cc"],
-    hdrs = [
-        "internal/city.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-    ],
-)
-
-cc_test(
-    name = "city_test",
-    srcs = ["internal/city_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":city",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "wyhash",
-    srcs = ["internal/wyhash.cc"],
-    hdrs = ["internal/wyhash.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-        "//absl/base:endian",
-        "//absl/numeric:int128",
-    ],
-)
-
-cc_test(
-    name = "wyhash_test",
-    srcs = ["internal/wyhash_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":wyhash",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/hash/CMakeLists.txt b/third_party/abseil/absl/hash/CMakeLists.txt
deleted file mode 100644
index 6d19877..0000000
--- a/third_party/abseil/absl/hash/CMakeLists.txt
+++ /dev/null
@@ -1,144 +0,0 @@
-#
-# Copyright 2018 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    hash
-  HDRS
-    "hash.h"
-  SRCS
-    "internal/hash.cc"
-    "internal/hash.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    DEPS
-    absl::city
-    absl::core_headers
-    absl::endian
-    absl::fixed_array
-    absl::meta
-    absl::int128
-    absl::strings
-    absl::optional
-    absl::variant
-    absl::utility
-    absl::wyhash
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    hash_testing
-  HDRS
-    "hash_testing.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::spy_hash_state
-    absl::meta
-    absl::strings
-    absl::variant
-    gmock
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    hash_test
-  SRCS
-    "hash_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::cord_test_helpers
-    absl::hash
-    absl::hash_testing
-    absl::core_headers
-    absl::flat_hash_set
-    absl::spy_hash_state
-    absl::meta
-    absl::int128
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    spy_hash_state
-  HDRS
-    "internal/spy_hash_state.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::hash
-    absl::strings
-    absl::str_format
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    city
-  HDRS
-    "internal/city.h"
-  SRCS
-    "internal/city.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::endian
-)
-
-absl_cc_test(
-  NAME
-    city_test
-  SRCS
-    "internal/city_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::city
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    wyhash
-  HDRS
-    "internal/wyhash.h"
-  SRCS
-    "internal/wyhash.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::endian
-    absl::int128
-)
-
-absl_cc_test(
-  NAME
-    wyhash_test
-  SRCS
-    "internal/wyhash_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::wyhash
-    absl::strings
-    gmock_main
-)
diff --git a/third_party/abseil/absl/hash/hash.h b/third_party/abseil/absl/hash/hash.h
deleted file mode 100644
index 5de132c..0000000
--- a/third_party/abseil/absl/hash/hash.h
+++ /dev/null
@@ -1,325 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: hash.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the Abseil `hash` library and the Abseil hashing
-// framework. This framework consists of the following:
-//
-//   * The `absl::Hash` functor, which is used to invoke the hasher within the
-//     Abseil hashing framework. `absl::Hash<T>` supports most basic types and
-//     a number of Abseil types out of the box.
-//   * `AbslHashValue`, an extension point that allows you to extend types to
-//     support Abseil hashing without requiring you to define a hashing
-//     algorithm.
-//   * `HashState`, a type-erased class which implements the manipulation of the
-//     hash state (H) itself, contains member functions `combine()` and
-//     `combine_contiguous()`, which you can use to contribute to an existing
-//     hash state when hashing your types.
-//
-// Unlike `std::hash` or other hashing frameworks, the Abseil hashing framework
-// provides most of its utility by abstracting away the hash algorithm (and its
-// implementation) entirely. Instead, a type invokes the Abseil hashing
-// framework by simply combining its state with the state of known, hashable
-// types. Hashing of that combined state is separately done by `absl::Hash`.
-//
-// One should assume that a hash algorithm is chosen randomly at the start of
-// each process.  E.g., `absl::Hash<int>{}(9)` in one process and
-// `absl::Hash<int>{}(9)` in another process are likely to differ.
-//
-// `absl::Hash` is intended to strongly mix input bits with a target of passing
-// an [Avalanche Test](https://en.wikipedia.org/wiki/Avalanche_effect).
-//
-// Example:
-//
-//   // Suppose we have a class `Circle` for which we want to add hashing:
-//   class Circle {
-//    public:
-//     ...
-//    private:
-//     std::pair<int, int> center_;
-//     int radius_;
-//   };
-//
-//   // To add hashing support to `Circle`, we simply need to add a free
-//   // (non-member) function `AbslHashValue()`, and return the combined hash
-//   // state of the existing hash state and the class state. You can add such a
-//   // free function using a friend declaration within the body of the class:
-//   class Circle {
-//    public:
-//     ...
-//     template <typename H>
-//     friend H AbslHashValue(H h, const Circle& c) {
-//       return H::combine(std::move(h), c.center_, c.radius_);
-//     }
-//     ...
-//   };
-//
-// For more information, see Adding Type Support to `absl::Hash` below.
-//
-#ifndef ABSL_HASH_HASH_H_
-#define ABSL_HASH_HASH_H_
-
-#include "absl/hash/internal/hash.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// `absl::Hash`
-// -----------------------------------------------------------------------------
-//
-// `absl::Hash<T>` is a convenient general-purpose hash functor for any type `T`
-// satisfying any of the following conditions (in order):
-//
-//  * T is an arithmetic or pointer type
-//  * T defines an overload for `AbslHashValue(H, const T&)` for an arbitrary
-//    hash state `H`.
-//  - T defines a specialization of `std::hash<T>`
-//
-// `absl::Hash` intrinsically supports the following types:
-//
-//   * All integral types (including bool)
-//   * All enum types
-//   * All floating-point types (although hashing them is discouraged)
-//   * All pointer types, including nullptr_t
-//   * std::pair<T1, T2>, if T1 and T2 are hashable
-//   * std::tuple<Ts...>, if all the Ts... are hashable
-//   * std::unique_ptr and std::shared_ptr
-//   * All string-like types including:
-//     * absl::Cord
-//     * std::string
-//     * std::string_view (as well as any instance of std::basic_string that
-//       uses char and std::char_traits)
-//  * All the standard sequence containers (provided the elements are hashable)
-//  * All the standard ordered associative containers (provided the elements are
-//    hashable)
-//  * absl types such as the following:
-//    * absl::string_view
-//    * absl::InlinedVector
-//    * absl::FixedArray
-//    * absl::uint128
-//    * absl::Time, absl::Duration, and absl::TimeZone
-//
-// Note: the list above is not meant to be exhaustive. Additional type support
-// may be added, in which case the above list will be updated.
-//
-// -----------------------------------------------------------------------------
-// absl::Hash Invocation Evaluation
-// -----------------------------------------------------------------------------
-//
-// When invoked, `absl::Hash<T>` searches for supplied hash functions in the
-// following order:
-//
-//   * Natively supported types out of the box (see above)
-//   * Types for which an `AbslHashValue()` overload is provided (such as
-//     user-defined types). See "Adding Type Support to `absl::Hash`" below.
-//   * Types which define a `std::hash<T>` specialization
-//
-// The fallback to legacy hash functions exists mainly for backwards
-// compatibility. If you have a choice, prefer defining an `AbslHashValue`
-// overload instead of specializing any legacy hash functors.
-//
-// -----------------------------------------------------------------------------
-// The Hash State Concept, and using `HashState` for Type Erasure
-// -----------------------------------------------------------------------------
-//
-// The `absl::Hash` framework relies on the Concept of a "hash state." Such a
-// hash state is used in several places:
-//
-// * Within existing implementations of `absl::Hash<T>` to store the hashed
-//   state of an object. Note that it is up to the implementation how it stores
-//   such state. A hash table, for example, may mix the state to produce an
-//   integer value; a testing framework may simply hold a vector of that state.
-// * Within implementations of `AbslHashValue()` used to extend user-defined
-//   types. (See "Adding Type Support to absl::Hash" below.)
-// * Inside a `HashState`, providing type erasure for the concept of a hash
-//   state, which you can use to extend the `absl::Hash` framework for types
-//   that are otherwise difficult to extend using `AbslHashValue()`. (See the
-//   `HashState` class below.)
-//
-// The "hash state" concept contains two member functions for mixing hash state:
-//
-// * `H::combine(state, values...)`
-//
-//   Combines an arbitrary number of values into a hash state, returning the
-//   updated state. Note that the existing hash state is move-only and must be
-//   passed by value.
-//
-//   Each of the value types T must be hashable by H.
-//
-//   NOTE:
-//
-//     state = H::combine(std::move(state), value1, value2, value3);
-//
-//   must be guaranteed to produce the same hash expansion as
-//
-//     state = H::combine(std::move(state), value1);
-//     state = H::combine(std::move(state), value2);
-//     state = H::combine(std::move(state), value3);
-//
-// * `H::combine_contiguous(state, data, size)`
-//
-//    Combines a contiguous array of `size` elements into a hash state,
-//    returning the updated state. Note that the existing hash state is
-//    move-only and must be passed by value.
-//
-//    NOTE:
-//
-//      state = H::combine_contiguous(std::move(state), data, size);
-//
-//    need NOT be guaranteed to produce the same hash expansion as a loop
-//    (it may perform internal optimizations). If you need this guarantee, use a
-//    loop instead.
-//
-// -----------------------------------------------------------------------------
-// Adding Type Support to `absl::Hash`
-// -----------------------------------------------------------------------------
-//
-// To add support for your user-defined type, add a proper `AbslHashValue()`
-// overload as a free (non-member) function. The overload will take an
-// existing hash state and should combine that state with state from the type.
-//
-// Example:
-//
-//   template <typename H>
-//   H AbslHashValue(H state, const MyType& v) {
-//     return H::combine(std::move(state), v.field1, ..., v.fieldN);
-//   }
-//
-// where `(field1, ..., fieldN)` are the members you would use on your
-// `operator==` to define equality.
-//
-// Notice that `AbslHashValue` is not a class member, but an ordinary function.
-// An `AbslHashValue` overload for a type should only be declared in the same
-// file and namespace as said type. The proper `AbslHashValue` implementation
-// for a given type will be discovered via ADL.
-//
-// Note: unlike `std::hash', `absl::Hash` should never be specialized. It must
-// only be extended by adding `AbslHashValue()` overloads.
-//
-template <typename T>
-using Hash = absl::hash_internal::Hash<T>;
-
-// HashState
-//
-// A type erased version of the hash state concept, for use in user-defined
-// `AbslHashValue` implementations that can't use templates (such as PImpl
-// classes, virtual functions, etc.). The type erasure adds overhead so it
-// should be avoided unless necessary.
-//
-// Note: This wrapper will only erase calls to:
-//     combine_contiguous(H, const unsigned char*, size_t)
-//
-// All other calls will be handled internally and will not invoke overloads
-// provided by the wrapped class.
-//
-// Users of this class should still define a template `AbslHashValue` function,
-// but can use `absl::HashState::Create(&state)` to erase the type of the hash
-// state and dispatch to their private hashing logic.
-//
-// This state can be used like any other hash state. In particular, you can call
-// `HashState::combine()` and `HashState::combine_contiguous()` on it.
-//
-// Example:
-//
-//   class Interface {
-//    public:
-//     template <typename H>
-//     friend H AbslHashValue(H state, const Interface& value) {
-//       state = H::combine(std::move(state), std::type_index(typeid(*this)));
-//       value.HashValue(absl::HashState::Create(&state));
-//       return state;
-//     }
-//    private:
-//     virtual void HashValue(absl::HashState state) const = 0;
-//   };
-//
-//   class Impl : Interface {
-//    private:
-//     void HashValue(absl::HashState state) const override {
-//       absl::HashState::combine(std::move(state), v1_, v2_);
-//     }
-//     int v1_;
-//     std::string v2_;
-//   };
-class HashState : public hash_internal::HashStateBase<HashState> {
- public:
-  // HashState::Create()
-  //
-  // Create a new `HashState` instance that wraps `state`. All calls to
-  // `combine()` and `combine_contiguous()` on the new instance will be
-  // redirected to the original `state` object. The `state` object must outlive
-  // the `HashState` instance.
-  template <typename T>
-  static HashState Create(T* state) {
-    HashState s;
-    s.Init(state);
-    return s;
-  }
-
-  HashState(const HashState&) = delete;
-  HashState& operator=(const HashState&) = delete;
-  HashState(HashState&&) = default;
-  HashState& operator=(HashState&&) = default;
-
-  // HashState::combine()
-  //
-  // Combines an arbitrary number of values into a hash state, returning the
-  // updated state.
-  using HashState::HashStateBase::combine;
-
-  // HashState::combine_contiguous()
-  //
-  // Combines a contiguous array of `size` elements into a hash state, returning
-  // the updated state.
-  static HashState combine_contiguous(HashState hash_state,
-                                      const unsigned char* first, size_t size) {
-    hash_state.combine_contiguous_(hash_state.state_, first, size);
-    return hash_state;
-  }
-  using HashState::HashStateBase::combine_contiguous;
-
- private:
-  HashState() = default;
-
-  template <typename T>
-  static void CombineContiguousImpl(void* p, const unsigned char* first,
-                                    size_t size) {
-    T& state = *static_cast<T*>(p);
-    state = T::combine_contiguous(std::move(state), first, size);
-  }
-
-  template <typename T>
-  void Init(T* state) {
-    state_ = state;
-    combine_contiguous_ = &CombineContiguousImpl<T>;
-  }
-
-  // Do not erase an already erased state.
-  void Init(HashState* state) {
-    state_ = state->state_;
-    combine_contiguous_ = state->combine_contiguous_;
-  }
-
-  void* state_;
-  void (*combine_contiguous_)(void*, const unsigned char*, size_t);
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_HASH_H_
diff --git a/third_party/abseil/absl/hash/hash_benchmark.cc b/third_party/abseil/absl/hash/hash_benchmark.cc
deleted file mode 100644
index d498ac2..0000000
--- a/third_party/abseil/absl/hash/hash_benchmark.cc
+++ /dev/null
@@ -1,254 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <string>
-#include <type_traits>
-#include <typeindex>
-#include <utility>
-#include <vector>
-
-#include "absl/base/attributes.h"
-#include "absl/hash/hash.h"
-#include "absl/random/random.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/cord_test_helpers.h"
-#include "absl/strings/string_view.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-using absl::Hash;
-
-template <template <typename> class H, typename T>
-void RunBenchmark(benchmark::State& state, T value) {
-  H<T> h;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(value);
-    benchmark::DoNotOptimize(h(value));
-  }
-}
-
-}  // namespace
-
-template <typename T>
-using AbslHash = absl::Hash<T>;
-
-class TypeErasedInterface {
- public:
-  virtual ~TypeErasedInterface() = default;
-
-  template <typename H>
-  friend H AbslHashValue(H state, const TypeErasedInterface& wrapper) {
-    state = H::combine(std::move(state), std::type_index(typeid(wrapper)));
-    wrapper.HashValue(absl::HashState::Create(&state));
-    return state;
-  }
-
- private:
-  virtual void HashValue(absl::HashState state) const = 0;
-};
-
-template <typename T>
-struct TypeErasedAbslHash {
-  class Wrapper : public TypeErasedInterface {
-   public:
-    explicit Wrapper(const T& value) : value_(value) {}
-
-   private:
-    void HashValue(absl::HashState state) const override {
-      absl::HashState::combine(std::move(state), value_);
-    }
-
-    const T& value_;
-  };
-
-  size_t operator()(const T& value) {
-    return absl::Hash<Wrapper>{}(Wrapper(value));
-  }
-};
-
-template <typename FuncType>
-inline FuncType* ODRUseFunction(FuncType* ptr) {
-  volatile FuncType* dummy = ptr;
-  return dummy;
-}
-
-absl::Cord FlatCord(size_t size) {
-  absl::Cord result(std::string(size, 'a'));
-  result.Flatten();
-  return result;
-}
-
-absl::Cord FragmentedCord(size_t size) {
-  const size_t orig_size = size;
-  std::vector<std::string> chunks;
-  size_t chunk_size = std::max<size_t>(1, size / 10);
-  while (size > chunk_size) {
-    chunks.push_back(std::string(chunk_size, 'a'));
-    size -= chunk_size;
-  }
-  if (size > 0) {
-    chunks.push_back(std::string(size, 'a'));
-  }
-  absl::Cord result = absl::MakeFragmentedCord(chunks);
-  (void) orig_size;
-  assert(result.size() == orig_size);
-  return result;
-}
-
-// Generates a benchmark and a codegen method for the provided types.  The
-// codegen method provides a well known entrypoint for dumping assembly.
-#define MAKE_BENCHMARK(hash, name, ...)                          \
-  namespace {                                                    \
-  void BM_##hash##_##name(benchmark::State& state) {             \
-    RunBenchmark<hash>(state, __VA_ARGS__);                      \
-  }                                                              \
-  BENCHMARK(BM_##hash##_##name);                                 \
-  }                                                              \
-  size_t Codegen##hash##name(const decltype(__VA_ARGS__)& arg);  \
-  size_t Codegen##hash##name(const decltype(__VA_ARGS__)& arg) { \
-    return hash<decltype(__VA_ARGS__)>{}(arg);                   \
-  }                                                              \
-  bool absl_hash_test_odr_use##hash##name =                      \
-      ODRUseFunction(&Codegen##hash##name);
-
-MAKE_BENCHMARK(AbslHash, Int32, int32_t{});
-MAKE_BENCHMARK(AbslHash, Int64, int64_t{});
-MAKE_BENCHMARK(AbslHash, Double, 1.2);
-MAKE_BENCHMARK(AbslHash, DoubleZero, 0.0);
-MAKE_BENCHMARK(AbslHash, PairInt32Int32, std::pair<int32_t, int32_t>{});
-MAKE_BENCHMARK(AbslHash, PairInt64Int64, std::pair<int64_t, int64_t>{});
-MAKE_BENCHMARK(AbslHash, TupleInt32BoolInt64,
-               std::tuple<int32_t, bool, int64_t>{});
-MAKE_BENCHMARK(AbslHash, String_0, std::string());
-MAKE_BENCHMARK(AbslHash, String_10, std::string(10, 'a'));
-MAKE_BENCHMARK(AbslHash, String_30, std::string(30, 'a'));
-MAKE_BENCHMARK(AbslHash, String_90, std::string(90, 'a'));
-MAKE_BENCHMARK(AbslHash, String_200, std::string(200, 'a'));
-MAKE_BENCHMARK(AbslHash, String_5000, std::string(5000, 'a'));
-MAKE_BENCHMARK(AbslHash, Cord_Flat_0, absl::Cord());
-MAKE_BENCHMARK(AbslHash, Cord_Flat_10, FlatCord(10));
-MAKE_BENCHMARK(AbslHash, Cord_Flat_30, FlatCord(30));
-MAKE_BENCHMARK(AbslHash, Cord_Flat_90, FlatCord(90));
-MAKE_BENCHMARK(AbslHash, Cord_Flat_200, FlatCord(200));
-MAKE_BENCHMARK(AbslHash, Cord_Flat_5000, FlatCord(5000));
-MAKE_BENCHMARK(AbslHash, Cord_Fragmented_200, FragmentedCord(200));
-MAKE_BENCHMARK(AbslHash, Cord_Fragmented_5000, FragmentedCord(5000));
-MAKE_BENCHMARK(AbslHash, VectorInt64_10, std::vector<int64_t>(10));
-MAKE_BENCHMARK(AbslHash, VectorInt64_100, std::vector<int64_t>(100));
-MAKE_BENCHMARK(AbslHash, VectorDouble_10, std::vector<double>(10, 1.1));
-MAKE_BENCHMARK(AbslHash, VectorDouble_100, std::vector<double>(100, 1.1));
-MAKE_BENCHMARK(AbslHash, PairStringString_0,
-               std::make_pair(std::string(), std::string()));
-MAKE_BENCHMARK(AbslHash, PairStringString_10,
-               std::make_pair(std::string(10, 'a'), std::string(10, 'b')));
-MAKE_BENCHMARK(AbslHash, PairStringString_30,
-               std::make_pair(std::string(30, 'a'), std::string(30, 'b')));
-MAKE_BENCHMARK(AbslHash, PairStringString_90,
-               std::make_pair(std::string(90, 'a'), std::string(90, 'b')));
-MAKE_BENCHMARK(AbslHash, PairStringString_200,
-               std::make_pair(std::string(200, 'a'), std::string(200, 'b')));
-MAKE_BENCHMARK(AbslHash, PairStringString_5000,
-               std::make_pair(std::string(5000, 'a'), std::string(5000, 'b')));
-
-MAKE_BENCHMARK(TypeErasedAbslHash, Int32, int32_t{});
-MAKE_BENCHMARK(TypeErasedAbslHash, Int64, int64_t{});
-MAKE_BENCHMARK(TypeErasedAbslHash, PairInt32Int32,
-               std::pair<int32_t, int32_t>{});
-MAKE_BENCHMARK(TypeErasedAbslHash, PairInt64Int64,
-               std::pair<int64_t, int64_t>{});
-MAKE_BENCHMARK(TypeErasedAbslHash, TupleInt32BoolInt64,
-               std::tuple<int32_t, bool, int64_t>{});
-MAKE_BENCHMARK(TypeErasedAbslHash, String_0, std::string());
-MAKE_BENCHMARK(TypeErasedAbslHash, String_10, std::string(10, 'a'));
-MAKE_BENCHMARK(TypeErasedAbslHash, String_30, std::string(30, 'a'));
-MAKE_BENCHMARK(TypeErasedAbslHash, String_90, std::string(90, 'a'));
-MAKE_BENCHMARK(TypeErasedAbslHash, String_200, std::string(200, 'a'));
-MAKE_BENCHMARK(TypeErasedAbslHash, String_5000, std::string(5000, 'a'));
-MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_10,
-               std::vector<double>(10, 1.1));
-MAKE_BENCHMARK(TypeErasedAbslHash, VectorDouble_100,
-               std::vector<double>(100, 1.1));
-
-// The latency benchmark attempts to model the speed of the hash function in
-// production. When a hash function is used for hashtable lookups it is rarely
-// used to hash N items in a tight loop nor on constant sized strings. Instead,
-// after hashing there is a potential equality test plus a (usually) large
-// amount of user code. To simulate this effectively we introduce a data
-// dependency between elements we hash by using the hash of the Nth element as
-// the selector of the N+1th element to hash. This isolates the hash function
-// code much like in production. As a bonus we use the hash to generate strings
-// of size [1,N] (instead of fixed N) to disable perfect branch predictions in
-// hash function implementations.
-namespace {
-// 16kb fits in L1 cache of most CPUs we care about. Keeping memory latency low
-// will allow us to attribute most time to CPU which means more accurate
-// measurements.
-static constexpr size_t kEntropySize = 16 << 10;
-static char entropy[kEntropySize + 1024];
-ABSL_ATTRIBUTE_UNUSED static const bool kInitialized = [] {
-  absl::BitGen gen;
-  static_assert(sizeof(entropy) % sizeof(uint64_t) == 0, "");
-  for (int i = 0; i != sizeof(entropy); i += sizeof(uint64_t)) {
-    auto rand = absl::Uniform<uint64_t>(gen);
-    memcpy(&entropy[i], &rand, sizeof(uint64_t));
-  }
-  return true;
-}();
-}  // namespace
-
-template <class T>
-struct PodRand {
-  static_assert(std::is_pod<T>::value, "");
-  static_assert(kEntropySize + sizeof(T) < sizeof(entropy), "");
-
-  T Get(size_t i) const {
-    T v;
-    memcpy(&v, &entropy[i % kEntropySize], sizeof(T));
-    return v;
-  }
-};
-
-template <size_t N>
-struct StringRand {
-  static_assert(kEntropySize + N < sizeof(entropy), "");
-
-  absl::string_view Get(size_t i) const {
-    // This has a small bias towards small numbers. Because max N is ~200 this
-    // is very small and prefer to be very fast instead of absolutely accurate.
-    // Also we pass N = 2^K+1 so that mod reduces to a bitand.
-    size_t s = (i % (N - 1)) + 1;
-    return {&entropy[i % kEntropySize], s};
-  }
-};
-
-#define MAKE_LATENCY_BENCHMARK(hash, name, ...)              \
-  namespace {                                                \
-  void BM_latency_##hash##_##name(benchmark::State& state) { \
-    __VA_ARGS__ r;                                           \
-    hash<decltype(r.Get(0))> h;                              \
-    size_t i = 871401241;                                    \
-    for (auto _ : state) {                                   \
-      benchmark::DoNotOptimize(i = h(r.Get(i)));             \
-    }                                                        \
-  }                                                          \
-  BENCHMARK(BM_latency_##hash##_##name);                     \
-  }  // namespace
-
-MAKE_LATENCY_BENCHMARK(AbslHash, Int32, PodRand<int32_t>);
-MAKE_LATENCY_BENCHMARK(AbslHash, Int64, PodRand<int64_t>);
-MAKE_LATENCY_BENCHMARK(AbslHash, String9, StringRand<9>);
-MAKE_LATENCY_BENCHMARK(AbslHash, String33, StringRand<33>);
-MAKE_LATENCY_BENCHMARK(AbslHash, String65, StringRand<65>);
-MAKE_LATENCY_BENCHMARK(AbslHash, String257, StringRand<257>);
diff --git a/third_party/abseil/absl/hash/hash_test.cc b/third_party/abseil/absl/hash/hash_test.cc
deleted file mode 100644
index 1d2e6cf..0000000
--- a/third_party/abseil/absl/hash/hash_test.cc
+++ /dev/null
@@ -1,976 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/hash/hash.h"
-
-#include <array>
-#include <bitset>
-#include <cstring>
-#include <deque>
-#include <forward_list>
-#include <functional>
-#include <iterator>
-#include <limits>
-#include <list>
-#include <map>
-#include <memory>
-#include <numeric>
-#include <random>
-#include <set>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <unordered_map>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/flat_hash_set.h"
-#include "absl/hash/hash_testing.h"
-#include "absl/hash/internal/spy_hash_state.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/cord_test_helpers.h"
-
-namespace {
-
-using absl::Hash;
-using absl::hash_internal::SpyHashState;
-
-template <typename T>
-class HashValueIntTest : public testing::Test {
-};
-TYPED_TEST_SUITE_P(HashValueIntTest);
-
-template <typename T>
-SpyHashState SpyHash(const T& value) {
-  return SpyHashState::combine(SpyHashState(), value);
-}
-
-// Helper trait to verify if T is hashable. We use absl::Hash's poison status to
-// detect it.
-template <typename T>
-using is_hashable = std::is_default_constructible<absl::Hash<T>>;
-
-TYPED_TEST_P(HashValueIntTest, BasicUsage) {
-  EXPECT_TRUE((is_hashable<TypeParam>::value));
-
-  TypeParam n = 42;
-  EXPECT_EQ(SpyHash(n), SpyHash(TypeParam{42}));
-  EXPECT_NE(SpyHash(n), SpyHash(TypeParam{0}));
-  EXPECT_NE(SpyHash(std::numeric_limits<TypeParam>::max()),
-            SpyHash(std::numeric_limits<TypeParam>::min()));
-}
-
-TYPED_TEST_P(HashValueIntTest, FastPath) {
-  // Test the fast-path to make sure the values are the same.
-  TypeParam n = 42;
-  EXPECT_EQ(absl::Hash<TypeParam>{}(n),
-            absl::Hash<std::tuple<TypeParam>>{}(std::tuple<TypeParam>(n)));
-}
-
-REGISTER_TYPED_TEST_CASE_P(HashValueIntTest, BasicUsage, FastPath);
-using IntTypes = testing::Types<unsigned char, char, int, int32_t, int64_t,
-                                uint32_t, uint64_t, size_t>;
-INSTANTIATE_TYPED_TEST_CASE_P(My, HashValueIntTest, IntTypes);
-
-enum LegacyEnum { kValue1, kValue2, kValue3 };
-
-enum class EnumClass { kValue4, kValue5, kValue6 };
-
-TEST(HashValueTest, EnumAndBool) {
-  EXPECT_TRUE((is_hashable<LegacyEnum>::value));
-  EXPECT_TRUE((is_hashable<EnumClass>::value));
-  EXPECT_TRUE((is_hashable<bool>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      LegacyEnum::kValue1, LegacyEnum::kValue2, LegacyEnum::kValue3)));
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      EnumClass::kValue4, EnumClass::kValue5, EnumClass::kValue6)));
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(true, false)));
-}
-
-TEST(HashValueTest, FloatingPoint) {
-  EXPECT_TRUE((is_hashable<float>::value));
-  EXPECT_TRUE((is_hashable<double>::value));
-  EXPECT_TRUE((is_hashable<long double>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(42.f, 0.f, -0.f, std::numeric_limits<float>::infinity(),
-                      -std::numeric_limits<float>::infinity())));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(42., 0., -0., std::numeric_limits<double>::infinity(),
-                      -std::numeric_limits<double>::infinity())));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      // Add some values with small exponent to test that NORMAL values also
-      // append their category.
-      .5L, 1.L, 2.L, 4.L, 42.L, 0.L, -0.L,
-      17 * static_cast<long double>(std::numeric_limits<double>::max()),
-      std::numeric_limits<long double>::infinity(),
-      -std::numeric_limits<long double>::infinity())));
-}
-
-TEST(HashValueTest, Pointer) {
-  EXPECT_TRUE((is_hashable<int*>::value));
-
-  int i;
-  int* ptr = &i;
-  int* n = nullptr;
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(&i, ptr, nullptr, ptr + 1, n)));
-}
-
-TEST(HashValueTest, PointerAlignment) {
-  // We want to make sure that pointer alignment will not cause bits to be
-  // stuck.
-
-  constexpr size_t kTotalSize = 1 << 20;
-  std::unique_ptr<char[]> data(new char[kTotalSize]);
-  constexpr size_t kLog2NumValues = 5;
-  constexpr size_t kNumValues = 1 << kLog2NumValues;
-
-  for (size_t align = 1; align < kTotalSize / kNumValues;
-       align < 8 ? align += 1 : align < 1024 ? align += 8 : align += 32) {
-    SCOPED_TRACE(align);
-    ASSERT_LE(align * kNumValues, kTotalSize);
-
-    size_t bits_or = 0;
-    size_t bits_and = ~size_t{};
-
-    for (size_t i = 0; i < kNumValues; ++i) {
-      size_t hash = absl::Hash<void*>()(data.get() + i * align);
-      bits_or |= hash;
-      bits_and &= hash;
-    }
-
-    // Limit the scope to the bits we would be using for Swisstable.
-    constexpr size_t kMask = (1 << (kLog2NumValues + 7)) - 1;
-    size_t stuck_bits = (~bits_or | bits_and) & kMask;
-    EXPECT_EQ(stuck_bits, 0) << "0x" << std::hex << stuck_bits;
-  }
-}
-
-TEST(HashValueTest, PairAndTuple) {
-  EXPECT_TRUE((is_hashable<std::pair<int, int>>::value));
-  EXPECT_TRUE((is_hashable<std::pair<const int&, const int&>>::value));
-  EXPECT_TRUE((is_hashable<std::tuple<int&, int&>>::value));
-  EXPECT_TRUE((is_hashable<std::tuple<int&&, int&&>>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      std::make_pair(0, 42), std::make_pair(0, 42), std::make_pair(42, 0),
-      std::make_pair(0, 0), std::make_pair(42, 42), std::make_pair(1, 42))));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(std::make_tuple(0, 0, 0), std::make_tuple(0, 0, 42),
-                      std::make_tuple(0, 23, 0), std::make_tuple(17, 0, 0),
-                      std::make_tuple(42, 0, 0), std::make_tuple(3, 9, 9),
-                      std::make_tuple(0, 0, -42))));
-
-  // Test that tuples of lvalue references work (so we need a few lvalues):
-  int a = 0, b = 1, c = 17, d = 23;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      std::tie(a, a), std::tie(a, b), std::tie(b, c), std::tie(c, d))));
-
-  // Test that tuples of rvalue references work:
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      std::forward_as_tuple(0, 0, 0), std::forward_as_tuple(0, 0, 42),
-      std::forward_as_tuple(0, 23, 0), std::forward_as_tuple(17, 0, 0),
-      std::forward_as_tuple(42, 0, 0), std::forward_as_tuple(3, 9, 9),
-      std::forward_as_tuple(0, 0, -42))));
-}
-
-TEST(HashValueTest, CombineContiguousWorks) {
-  std::vector<std::tuple<int>> v1 = {std::make_tuple(1), std::make_tuple(3)};
-  std::vector<std::tuple<int>> v2 = {std::make_tuple(1), std::make_tuple(2)};
-
-  auto vh1 = SpyHash(v1);
-  auto vh2 = SpyHash(v2);
-  EXPECT_NE(vh1, vh2);
-}
-
-struct DummyDeleter {
-  template <typename T>
-  void operator() (T* ptr) {}
-};
-
-struct SmartPointerEq {
-  template <typename T, typename U>
-  bool operator()(const T& t, const U& u) const {
-    return GetPtr(t) == GetPtr(u);
-  }
-
-  template <typename T>
-  static auto GetPtr(const T& t) -> decltype(&*t) {
-    return t ? &*t : nullptr;
-  }
-
-  static std::nullptr_t GetPtr(std::nullptr_t) { return nullptr; }
-};
-
-TEST(HashValueTest, SmartPointers) {
-  EXPECT_TRUE((is_hashable<std::unique_ptr<int>>::value));
-  EXPECT_TRUE((is_hashable<std::unique_ptr<int, DummyDeleter>>::value));
-  EXPECT_TRUE((is_hashable<std::shared_ptr<int>>::value));
-
-  int i, j;
-  std::unique_ptr<int, DummyDeleter> unique1(&i);
-  std::unique_ptr<int, DummyDeleter> unique2(&i);
-  std::unique_ptr<int, DummyDeleter> unique_other(&j);
-  std::unique_ptr<int, DummyDeleter> unique_null;
-
-  std::shared_ptr<int> shared1(&i, DummyDeleter());
-  std::shared_ptr<int> shared2(&i, DummyDeleter());
-  std::shared_ptr<int> shared_other(&j, DummyDeleter());
-  std::shared_ptr<int> shared_null;
-
-  // Sanity check of the Eq function.
-  ASSERT_TRUE(SmartPointerEq{}(unique1, shared1));
-  ASSERT_FALSE(SmartPointerEq{}(unique1, shared_other));
-  ASSERT_TRUE(SmartPointerEq{}(unique_null, nullptr));
-  ASSERT_FALSE(SmartPointerEq{}(shared2, nullptr));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::forward_as_tuple(&i, nullptr,                    //
-                            unique1, unique2, unique_null,  //
-                            absl::make_unique<int>(),       //
-                            shared1, shared2, shared_null,  //
-                            std::make_shared<int>()),
-      SmartPointerEq{}));
-}
-
-TEST(HashValueTest, FunctionPointer) {
-  using Func = int (*)();
-  EXPECT_TRUE(is_hashable<Func>::value);
-
-  Func p1 = [] { return 2; }, p2 = [] { return 1; };
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(p1, p2, nullptr)));
-}
-
-struct WrapInTuple {
-  template <typename T>
-  std::tuple<int, T, size_t> operator()(const T& t) const {
-    return std::make_tuple(7, t, 0xdeadbeef);
-  }
-};
-
-absl::Cord FlatCord(absl::string_view sv) {
-  absl::Cord c(sv);
-  c.Flatten();
-  return c;
-}
-
-absl::Cord FragmentedCord(absl::string_view sv) {
-  if (sv.size() < 2) {
-    return absl::Cord(sv);
-  }
-  size_t halfway = sv.size() / 2;
-  std::vector<absl::string_view> parts = {sv.substr(0, halfway),
-                                          sv.substr(halfway)};
-  return absl::MakeFragmentedCord(parts);
-}
-
-TEST(HashValueTest, Strings) {
-  EXPECT_TRUE((is_hashable<std::string>::value));
-
-  const std::string small = "foo";
-  const std::string dup = "foofoo";
-  const std::string large = std::string(2048, 'x');  // multiple of chunk size
-  const std::string huge = std::string(5000, 'a');   // not a multiple
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(  //
-      std::string(), absl::string_view(), absl::Cord(),                     //
-      std::string(""), absl::string_view(""), absl::Cord(""),               //
-      std::string(small), absl::string_view(small), absl::Cord(small),      //
-      std::string(dup), absl::string_view(dup), absl::Cord(dup),            //
-      std::string(large), absl::string_view(large), absl::Cord(large),      //
-      std::string(huge), absl::string_view(huge), FlatCord(huge),           //
-      FragmentedCord(huge))));
-
-  // Also check that nested types maintain the same hash.
-  const WrapInTuple t{};
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(  //
-      t(std::string()), t(absl::string_view()), t(absl::Cord()),            //
-      t(std::string("")), t(absl::string_view("")), t(absl::Cord("")),      //
-      t(std::string(small)), t(absl::string_view(small)),                   //
-          t(absl::Cord(small)),                                             //
-      t(std::string(dup)), t(absl::string_view(dup)), t(absl::Cord(dup)),   //
-      t(std::string(large)), t(absl::string_view(large)),                   //
-          t(absl::Cord(large)),                                             //
-      t(std::string(huge)), t(absl::string_view(huge)),                     //
-          t(FlatCord(huge)), t(FragmentedCord(huge)))));
-
-  // Make sure that hashing a `const char*` does not use its string-value.
-  EXPECT_NE(SpyHash(static_cast<const char*>("ABC")),
-            SpyHash(absl::string_view("ABC")));
-}
-
-TEST(HashValueTest, WString) {
-  EXPECT_TRUE((is_hashable<std::wstring>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      std::wstring(), std::wstring(L"ABC"), std::wstring(L"ABC"),
-      std::wstring(L"Some other different string"),
-      std::wstring(L"Iñtërnâtiônàlizætiøn"))));
-}
-
-TEST(HashValueTest, U16String) {
-  EXPECT_TRUE((is_hashable<std::u16string>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      std::u16string(), std::u16string(u"ABC"), std::u16string(u"ABC"),
-      std::u16string(u"Some other different string"),
-      std::u16string(u"Iñtërnâtiônàlizætiøn"))));
-}
-
-TEST(HashValueTest, U32String) {
-  EXPECT_TRUE((is_hashable<std::u32string>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      std::u32string(), std::u32string(U"ABC"), std::u32string(U"ABC"),
-      std::u32string(U"Some other different string"),
-      std::u32string(U"Iñtërnâtiônàlizætiøn"))));
-}
-
-TEST(HashValueTest, StdArray) {
-  EXPECT_TRUE((is_hashable<std::array<int, 3>>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(std::array<int, 3>{}, std::array<int, 3>{{0, 23, 42}})));
-}
-
-TEST(HashValueTest, StdBitset) {
-  EXPECT_TRUE((is_hashable<std::bitset<257>>::value));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      {std::bitset<2>("00"), std::bitset<2>("01"), std::bitset<2>("10"),
-       std::bitset<2>("11")}));
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      {std::bitset<5>("10101"), std::bitset<5>("10001"), std::bitset<5>()}));
-
-  constexpr int kNumBits = 256;
-  std::array<std::string, 6> bit_strings;
-  bit_strings.fill(std::string(kNumBits, '1'));
-  bit_strings[1][0] = '0';
-  bit_strings[2][1] = '0';
-  bit_strings[3][kNumBits / 3] = '0';
-  bit_strings[4][kNumBits - 2] = '0';
-  bit_strings[5][kNumBits - 1] = '0';
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      {std::bitset<kNumBits>(bit_strings[0].c_str()),
-       std::bitset<kNumBits>(bit_strings[1].c_str()),
-       std::bitset<kNumBits>(bit_strings[2].c_str()),
-       std::bitset<kNumBits>(bit_strings[3].c_str()),
-       std::bitset<kNumBits>(bit_strings[4].c_str()),
-       std::bitset<kNumBits>(bit_strings[5].c_str())}));
-}  // namespace
-
-template <typename T>
-class HashValueSequenceTest : public testing::Test {
-};
-TYPED_TEST_SUITE_P(HashValueSequenceTest);
-
-TYPED_TEST_P(HashValueSequenceTest, BasicUsage) {
-  EXPECT_TRUE((is_hashable<TypeParam>::value));
-
-  using ValueType = typename TypeParam::value_type;
-  auto a = static_cast<ValueType>(0);
-  auto b = static_cast<ValueType>(23);
-  auto c = static_cast<ValueType>(42);
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(TypeParam(), TypeParam{}, TypeParam{a, b, c},
-                      TypeParam{a, b}, TypeParam{b, c})));
-}
-
-REGISTER_TYPED_TEST_CASE_P(HashValueSequenceTest, BasicUsage);
-using IntSequenceTypes =
-    testing::Types<std::deque<int>, std::forward_list<int>, std::list<int>,
-                   std::vector<int>, std::vector<bool>, std::set<int>,
-                   std::multiset<int>>;
-INSTANTIATE_TYPED_TEST_CASE_P(My, HashValueSequenceTest, IntSequenceTypes);
-
-// Private type that only supports AbslHashValue to make sure our chosen hash
-// implementation is recursive within absl::Hash.
-// It uses std::abs() on the value to provide different bitwise representations
-// of the same logical value.
-struct Private {
-  int i;
-  template <typename H>
-  friend H AbslHashValue(H h, Private p) {
-    return H::combine(std::move(h), std::abs(p.i));
-  }
-
-  friend bool operator==(Private a, Private b) {
-    return std::abs(a.i) == std::abs(b.i);
-  }
-
-  friend std::ostream& operator<<(std::ostream& o, Private p) {
-    return o << p.i;
-  }
-};
-
-// Test helper for combine_piecewise_buffer.  It holds a string_view to the
-// buffer-to-be-hashed.  Its AbslHashValue specialization will split up its
-// contents at the character offsets requested.
-class PiecewiseHashTester {
- public:
-  // Create a hash view of a buffer to be hashed contiguously.
-  explicit PiecewiseHashTester(absl::string_view buf)
-      : buf_(buf), piecewise_(false), split_locations_() {}
-
-  // Create a hash view of a buffer to be hashed piecewise, with breaks at the
-  // given locations.
-  PiecewiseHashTester(absl::string_view buf, std::set<size_t> split_locations)
-      : buf_(buf),
-        piecewise_(true),
-        split_locations_(std::move(split_locations)) {}
-
-  template <typename H>
-  friend H AbslHashValue(H h, const PiecewiseHashTester& p) {
-    if (!p.piecewise_) {
-      return H::combine_contiguous(std::move(h), p.buf_.data(), p.buf_.size());
-    }
-    absl::hash_internal::PiecewiseCombiner combiner;
-    if (p.split_locations_.empty()) {
-      h = combiner.add_buffer(std::move(h), p.buf_.data(), p.buf_.size());
-      return combiner.finalize(std::move(h));
-    }
-    size_t begin = 0;
-    for (size_t next : p.split_locations_) {
-      absl::string_view chunk = p.buf_.substr(begin, next - begin);
-      h = combiner.add_buffer(std::move(h), chunk.data(), chunk.size());
-      begin = next;
-    }
-    absl::string_view last_chunk = p.buf_.substr(begin);
-    if (!last_chunk.empty()) {
-      h = combiner.add_buffer(std::move(h), last_chunk.data(),
-                              last_chunk.size());
-    }
-    return combiner.finalize(std::move(h));
-  }
-
- private:
-  absl::string_view buf_;
-  bool piecewise_;
-  std::set<size_t> split_locations_;
-};
-
-// Dummy object that hashes as two distinct contiguous buffers, "foo" followed
-// by "bar"
-struct DummyFooBar {
-  template <typename H>
-  friend H AbslHashValue(H h, const DummyFooBar&) {
-    const char* foo = "foo";
-    const char* bar = "bar";
-    h = H::combine_contiguous(std::move(h), foo, 3);
-    h = H::combine_contiguous(std::move(h), bar, 3);
-    return h;
-  }
-};
-
-TEST(HashValueTest, CombinePiecewiseBuffer) {
-  absl::Hash<PiecewiseHashTester> hash;
-
-  // Check that hashing an empty buffer through the piecewise API works.
-  EXPECT_EQ(hash(PiecewiseHashTester("")), hash(PiecewiseHashTester("", {})));
-
-  // Similarly, small buffers should give consistent results
-  EXPECT_EQ(hash(PiecewiseHashTester("foobar")),
-            hash(PiecewiseHashTester("foobar", {})));
-  EXPECT_EQ(hash(PiecewiseHashTester("foobar")),
-            hash(PiecewiseHashTester("foobar", {3})));
-
-  // But hashing "foobar" in pieces gives a different answer than hashing "foo"
-  // contiguously, then "bar" contiguously.
-  EXPECT_NE(hash(PiecewiseHashTester("foobar", {3})),
-            absl::Hash<DummyFooBar>()(DummyFooBar{}));
-
-  // Test hashing a large buffer incrementally, broken up in several different
-  // ways.  Arrange for breaks on and near the stride boundaries to look for
-  // off-by-one errors in the implementation.
-  //
-  // This test is run on a buffer that is a multiple of the stride size, and one
-  // that isn't.
-  for (size_t big_buffer_size : {1024 * 2 + 512, 1024 * 3}) {
-    SCOPED_TRACE(big_buffer_size);
-    std::string big_buffer;
-    for (int i = 0; i < big_buffer_size; ++i) {
-      // Arbitrary string
-      big_buffer.push_back(32 + (i * (i / 3)) % 64);
-    }
-    auto big_buffer_hash = hash(PiecewiseHashTester(big_buffer));
-
-    const int possible_breaks = 9;
-    size_t breaks[possible_breaks] = {1,    512,  1023, 1024, 1025,
-                                      1536, 2047, 2048, 2049};
-    for (unsigned test_mask = 0; test_mask < (1u << possible_breaks);
-         ++test_mask) {
-      SCOPED_TRACE(test_mask);
-      std::set<size_t> break_locations;
-      for (int j = 0; j < possible_breaks; ++j) {
-        if (test_mask & (1u << j)) {
-          break_locations.insert(breaks[j]);
-        }
-      }
-      EXPECT_EQ(
-          hash(PiecewiseHashTester(big_buffer, std::move(break_locations))),
-          big_buffer_hash);
-    }
-  }
-}
-
-TEST(HashValueTest, PrivateSanity) {
-  // Sanity check that Private is working as the tests below expect it to work.
-  EXPECT_TRUE(is_hashable<Private>::value);
-  EXPECT_NE(SpyHash(Private{0}), SpyHash(Private{1}));
-  EXPECT_EQ(SpyHash(Private{1}), SpyHash(Private{1}));
-}
-
-TEST(HashValueTest, Optional) {
-  EXPECT_TRUE(is_hashable<absl::optional<Private>>::value);
-
-  using O = absl::optional<Private>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(O{}, O{{1}}, O{{-1}}, O{{10}})));
-}
-
-TEST(HashValueTest, Variant) {
-  using V = absl::variant<Private, std::string>;
-  EXPECT_TRUE(is_hashable<V>::value);
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      V(Private{1}), V(Private{-1}), V(Private{2}), V("ABC"), V("BCD"))));
-
-#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-  struct S {};
-  EXPECT_FALSE(is_hashable<absl::variant<S>>::value);
-#endif
-}
-
-TEST(HashValueTest, Maps) {
-  EXPECT_TRUE((is_hashable<std::map<int, std::string>>::value));
-
-  using M = std::map<int, std::string>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      M{}, M{{0, "foo"}}, M{{1, "foo"}}, M{{0, "bar"}}, M{{1, "bar"}},
-      M{{0, "foo"}, {42, "bar"}}, M{{1, "foo"}, {42, "bar"}},
-      M{{1, "foo"}, {43, "bar"}}, M{{1, "foo"}, {43, "baz"}})));
-
-  using MM = std::multimap<int, std::string>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      MM{}, MM{{0, "foo"}}, MM{{1, "foo"}}, MM{{0, "bar"}}, MM{{1, "bar"}},
-      MM{{0, "foo"}, {0, "bar"}}, MM{{0, "bar"}, {0, "foo"}},
-      MM{{0, "foo"}, {42, "bar"}}, MM{{1, "foo"}, {42, "bar"}},
-      MM{{1, "foo"}, {1, "foo"}, {43, "bar"}}, MM{{1, "foo"}, {43, "baz"}})));
-}
-
-TEST(HashValueTest, ReferenceWrapper) {
-  EXPECT_TRUE(is_hashable<std::reference_wrapper<Private>>::value);
-
-  Private p1{1}, p10{10};
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      p1, p10, std::ref(p1), std::ref(p10), std::cref(p1), std::cref(p10))));
-
-  EXPECT_TRUE(is_hashable<std::reference_wrapper<int>>::value);
-  int one = 1, ten = 10;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(std::make_tuple(
-      one, ten, std::ref(one), std::ref(ten), std::cref(one), std::cref(ten))));
-
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      std::make_tuple(std::tuple<std::reference_wrapper<int>>(std::ref(one)),
-                      std::tuple<std::reference_wrapper<int>>(std::ref(ten)),
-                      std::tuple<int>(one), std::tuple<int>(ten))));
-}
-
-template <typename T, typename = void>
-struct IsHashCallable : std::false_type {};
-
-template <typename T>
-struct IsHashCallable<T, absl::void_t<decltype(std::declval<absl::Hash<T>>()(
-                            std::declval<const T&>()))>> : std::true_type {};
-
-template <typename T, typename = void>
-struct IsAggregateInitializable : std::false_type {};
-
-template <typename T>
-struct IsAggregateInitializable<T, absl::void_t<decltype(T{})>>
-    : std::true_type {};
-
-TEST(IsHashableTest, ValidHash) {
-  EXPECT_TRUE((is_hashable<int>::value));
-  EXPECT_TRUE(std::is_default_constructible<absl::Hash<int>>::value);
-  EXPECT_TRUE(std::is_copy_constructible<absl::Hash<int>>::value);
-  EXPECT_TRUE(std::is_move_constructible<absl::Hash<int>>::value);
-  EXPECT_TRUE(absl::is_copy_assignable<absl::Hash<int>>::value);
-  EXPECT_TRUE(absl::is_move_assignable<absl::Hash<int>>::value);
-  EXPECT_TRUE(IsHashCallable<int>::value);
-  EXPECT_TRUE(IsAggregateInitializable<absl::Hash<int>>::value);
-}
-
-#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-TEST(IsHashableTest, PoisonHash) {
-  struct X {};
-  EXPECT_FALSE((is_hashable<X>::value));
-  EXPECT_FALSE(std::is_default_constructible<absl::Hash<X>>::value);
-  EXPECT_FALSE(std::is_copy_constructible<absl::Hash<X>>::value);
-  EXPECT_FALSE(std::is_move_constructible<absl::Hash<X>>::value);
-  EXPECT_FALSE(absl::is_copy_assignable<absl::Hash<X>>::value);
-  EXPECT_FALSE(absl::is_move_assignable<absl::Hash<X>>::value);
-  EXPECT_FALSE(IsHashCallable<X>::value);
-#if !defined(__GNUC__) || __GNUC__ < 9
-  // This doesn't compile on GCC 9.
-  EXPECT_FALSE(IsAggregateInitializable<absl::Hash<X>>::value);
-#endif
-}
-#endif  // ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-
-// Hashable types
-//
-// These types exist simply to exercise various AbslHashValue behaviors, so
-// they are named by what their AbslHashValue overload does.
-struct NoOp {
-  template <typename HashCode>
-  friend HashCode AbslHashValue(HashCode h, NoOp n) {
-    return h;
-  }
-};
-
-struct EmptyCombine {
-  template <typename HashCode>
-  friend HashCode AbslHashValue(HashCode h, EmptyCombine e) {
-    return HashCode::combine(std::move(h));
-  }
-};
-
-template <typename Int>
-struct CombineIterative {
-  template <typename HashCode>
-  friend HashCode AbslHashValue(HashCode h, CombineIterative c) {
-    for (int i = 0; i < 5; ++i) {
-      h = HashCode::combine(std::move(h), Int(i));
-    }
-    return h;
-  }
-};
-
-template <typename Int>
-struct CombineVariadic {
-  template <typename HashCode>
-  friend HashCode AbslHashValue(HashCode h, CombineVariadic c) {
-    return HashCode::combine(std::move(h), Int(0), Int(1), Int(2), Int(3),
-                             Int(4));
-  }
-};
-enum class InvokeTag {
-  kUniquelyRepresented,
-  kHashValue,
-#if ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-  kLegacyHash,
-#endif  // ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-  kStdHash,
-  kNone
-};
-
-template <InvokeTag T>
-using InvokeTagConstant = std::integral_constant<InvokeTag, T>;
-
-template <InvokeTag... Tags>
-struct MinTag;
-
-template <InvokeTag a, InvokeTag b, InvokeTag... Tags>
-struct MinTag<a, b, Tags...> : MinTag<(a < b ? a : b), Tags...> {};
-
-template <InvokeTag a>
-struct MinTag<a> : InvokeTagConstant<a> {};
-
-template <InvokeTag... Tags>
-struct CustomHashType {
-  explicit CustomHashType(size_t val) : value(val) {}
-  size_t value;
-};
-
-template <InvokeTag allowed, InvokeTag... tags>
-struct EnableIfContained
-    : std::enable_if<absl::disjunction<
-          std::integral_constant<bool, allowed == tags>...>::value> {};
-
-template <
-    typename H, InvokeTag... Tags,
-    typename = typename EnableIfContained<InvokeTag::kHashValue, Tags...>::type>
-H AbslHashValue(H state, CustomHashType<Tags...> t) {
-  static_assert(MinTag<Tags...>::value == InvokeTag::kHashValue, "");
-  return H::combine(std::move(state),
-                    t.value + static_cast<int>(InvokeTag::kHashValue));
-}
-
-}  // namespace
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-template <InvokeTag... Tags>
-struct is_uniquely_represented<
-    CustomHashType<Tags...>,
-    typename EnableIfContained<InvokeTag::kUniquelyRepresented, Tags...>::type>
-    : std::true_type {};
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#if ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-namespace ABSL_INTERNAL_LEGACY_HASH_NAMESPACE {
-template <InvokeTag... Tags>
-struct hash<CustomHashType<Tags...>> {
-  template <InvokeTag... TagsIn, typename = typename EnableIfContained<
-                                     InvokeTag::kLegacyHash, TagsIn...>::type>
-  size_t operator()(CustomHashType<TagsIn...> t) const {
-    static_assert(MinTag<Tags...>::value == InvokeTag::kLegacyHash, "");
-    return t.value + static_cast<int>(InvokeTag::kLegacyHash);
-  }
-};
-}  // namespace ABSL_INTERNAL_LEGACY_HASH_NAMESPACE
-#endif  // ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-
-namespace std {
-template <InvokeTag... Tags>  // NOLINT
-struct hash<CustomHashType<Tags...>> {
-  template <InvokeTag... TagsIn, typename = typename EnableIfContained<
-                                     InvokeTag::kStdHash, TagsIn...>::type>
-  size_t operator()(CustomHashType<TagsIn...> t) const {
-    static_assert(MinTag<Tags...>::value == InvokeTag::kStdHash, "");
-    return t.value + static_cast<int>(InvokeTag::kStdHash);
-  }
-};
-}  // namespace std
-
-namespace {
-
-template <typename... T>
-void TestCustomHashType(InvokeTagConstant<InvokeTag::kNone>, T...) {
-  using type = CustomHashType<T::value...>;
-  SCOPED_TRACE(testing::PrintToString(std::vector<InvokeTag>{T::value...}));
-  EXPECT_TRUE(is_hashable<type>());
-  EXPECT_TRUE(is_hashable<const type>());
-  EXPECT_TRUE(is_hashable<const type&>());
-
-  const size_t offset = static_cast<int>(std::min({T::value...}));
-  EXPECT_EQ(SpyHash(type(7)), SpyHash(size_t{7 + offset}));
-}
-
-void TestCustomHashType(InvokeTagConstant<InvokeTag::kNone>) {
-#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-  // is_hashable is false if we don't support any of the hooks.
-  using type = CustomHashType<>;
-  EXPECT_FALSE(is_hashable<type>());
-  EXPECT_FALSE(is_hashable<const type>());
-  EXPECT_FALSE(is_hashable<const type&>());
-#endif  // ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-}
-
-template <InvokeTag Tag, typename... T>
-void TestCustomHashType(InvokeTagConstant<Tag> tag, T... t) {
-  constexpr auto next = static_cast<InvokeTag>(static_cast<int>(Tag) + 1);
-  TestCustomHashType(InvokeTagConstant<next>(), tag, t...);
-  TestCustomHashType(InvokeTagConstant<next>(), t...);
-}
-
-TEST(HashTest, CustomHashType) {
-  TestCustomHashType(InvokeTagConstant<InvokeTag{}>());
-}
-
-TEST(HashTest, NoOpsAreEquivalent) {
-  EXPECT_EQ(Hash<NoOp>()({}), Hash<NoOp>()({}));
-  EXPECT_EQ(Hash<NoOp>()({}), Hash<EmptyCombine>()({}));
-}
-
-template <typename T>
-class HashIntTest : public testing::Test {
-};
-TYPED_TEST_SUITE_P(HashIntTest);
-
-TYPED_TEST_P(HashIntTest, BasicUsage) {
-  EXPECT_NE(Hash<NoOp>()({}), Hash<TypeParam>()(0));
-  EXPECT_NE(Hash<NoOp>()({}),
-            Hash<TypeParam>()(std::numeric_limits<TypeParam>::max()));
-  if (std::numeric_limits<TypeParam>::min() != 0) {
-    EXPECT_NE(Hash<NoOp>()({}),
-              Hash<TypeParam>()(std::numeric_limits<TypeParam>::min()));
-  }
-
-  EXPECT_EQ(Hash<CombineIterative<TypeParam>>()({}),
-            Hash<CombineVariadic<TypeParam>>()({}));
-}
-
-REGISTER_TYPED_TEST_CASE_P(HashIntTest, BasicUsage);
-using IntTypes = testing::Types<unsigned char, char, int, int32_t, int64_t,
-                                uint32_t, uint64_t, size_t>;
-INSTANTIATE_TYPED_TEST_CASE_P(My, HashIntTest, IntTypes);
-
-struct StructWithPadding {
-  char c;
-  int i;
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, const StructWithPadding& s) {
-    return H::combine(std::move(hash_state), s.c, s.i);
-  }
-};
-
-static_assert(sizeof(StructWithPadding) > sizeof(char) + sizeof(int),
-              "StructWithPadding doesn't have padding");
-static_assert(std::is_standard_layout<StructWithPadding>::value, "");
-
-// This check has to be disabled because libstdc++ doesn't support it.
-// static_assert(std::is_trivially_constructible<StructWithPadding>::value, "");
-
-template <typename T>
-struct ArraySlice {
-  T* begin;
-  T* end;
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, const ArraySlice& slice) {
-    for (auto t = slice.begin; t != slice.end; ++t) {
-      hash_state = H::combine(std::move(hash_state), *t);
-    }
-    return hash_state;
-  }
-};
-
-TEST(HashTest, HashNonUniquelyRepresentedType) {
-  // Create equal StructWithPadding objects that are known to have non-equal
-  // padding bytes.
-  static const size_t kNumStructs = 10;
-  unsigned char buffer1[kNumStructs * sizeof(StructWithPadding)];
-  std::memset(buffer1, 0, sizeof(buffer1));
-  auto* s1 = reinterpret_cast<StructWithPadding*>(buffer1);
-
-  unsigned char buffer2[kNumStructs * sizeof(StructWithPadding)];
-  std::memset(buffer2, 255, sizeof(buffer2));
-  auto* s2 = reinterpret_cast<StructWithPadding*>(buffer2);
-  for (int i = 0; i < kNumStructs; ++i) {
-    SCOPED_TRACE(i);
-    s1[i].c = s2[i].c = '0' + i;
-    s1[i].i = s2[i].i = i;
-    ASSERT_FALSE(memcmp(buffer1 + i * sizeof(StructWithPadding),
-                        buffer2 + i * sizeof(StructWithPadding),
-                        sizeof(StructWithPadding)) == 0)
-        << "Bug in test code: objects do not have unequal"
-        << " object representations";
-  }
-
-  EXPECT_EQ(Hash<StructWithPadding>()(s1[0]), Hash<StructWithPadding>()(s2[0]));
-  EXPECT_EQ(Hash<ArraySlice<StructWithPadding>>()({s1, s1 + kNumStructs}),
-            Hash<ArraySlice<StructWithPadding>>()({s2, s2 + kNumStructs}));
-}
-
-TEST(HashTest, StandardHashContainerUsage) {
-  std::unordered_map<int, std::string, Hash<int>> map = {{0, "foo"},
-                                                         {42, "bar"}};
-
-  EXPECT_NE(map.find(0), map.end());
-  EXPECT_EQ(map.find(1), map.end());
-  EXPECT_NE(map.find(0u), map.end());
-}
-
-struct ConvertibleFromNoOp {
-  ConvertibleFromNoOp(NoOp) {}  // NOLINT(runtime/explicit)
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, ConvertibleFromNoOp) {
-    return H::combine(std::move(hash_state), 1);
-  }
-};
-
-TEST(HashTest, HeterogeneousCall) {
-  EXPECT_NE(Hash<ConvertibleFromNoOp>()(NoOp()),
-            Hash<NoOp>()(NoOp()));
-}
-
-TEST(IsUniquelyRepresentedTest, SanityTest) {
-  using absl::hash_internal::is_uniquely_represented;
-
-  EXPECT_TRUE(is_uniquely_represented<unsigned char>::value);
-  EXPECT_TRUE(is_uniquely_represented<int>::value);
-  EXPECT_FALSE(is_uniquely_represented<bool>::value);
-  EXPECT_FALSE(is_uniquely_represented<int*>::value);
-}
-
-struct IntAndString {
-  int i;
-  std::string s;
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, IntAndString int_and_string) {
-    return H::combine(std::move(hash_state), int_and_string.s,
-                      int_and_string.i);
-  }
-};
-
-TEST(HashTest, SmallValueOn64ByteBoundary) {
-  Hash<IntAndString>()(IntAndString{0, std::string(63, '0')});
-}
-
-struct TypeErased {
-  size_t n;
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, const TypeErased& v) {
-    v.HashValue(absl::HashState::Create(&hash_state));
-    return hash_state;
-  }
-
-  void HashValue(absl::HashState state) const {
-    absl::HashState::combine(std::move(state), n);
-  }
-};
-
-TEST(HashTest, TypeErased) {
-  EXPECT_TRUE((is_hashable<TypeErased>::value));
-  EXPECT_TRUE((is_hashable<std::pair<TypeErased, int>>::value));
-
-  EXPECT_EQ(SpyHash(TypeErased{7}), SpyHash(size_t{7}));
-  EXPECT_NE(SpyHash(TypeErased{7}), SpyHash(size_t{13}));
-
-  EXPECT_EQ(SpyHash(std::make_pair(TypeErased{7}, 17)),
-            SpyHash(std::make_pair(size_t{7}, 17)));
-}
-
-struct ValueWithBoolConversion {
-  operator bool() const { return false; }
-  int i;
-};
-
-}  // namespace
-namespace std {
-template <>
-struct hash<ValueWithBoolConversion> {
-  size_t operator()(ValueWithBoolConversion v) { return v.i; }
-};
-}  // namespace std
-
-namespace {
-
-TEST(HashTest, DoesNotUseImplicitConversionsToBool) {
-  EXPECT_NE(absl::Hash<ValueWithBoolConversion>()(ValueWithBoolConversion{0}),
-            absl::Hash<ValueWithBoolConversion>()(ValueWithBoolConversion{1}));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/hash/hash_testing.h b/third_party/abseil/absl/hash/hash_testing.h
deleted file mode 100644
index 1e1c574..0000000
--- a/third_party/abseil/absl/hash/hash_testing.h
+++ /dev/null
@@ -1,378 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_HASH_HASH_TESTING_H_
-#define ABSL_HASH_HASH_TESTING_H_
-
-#include <initializer_list>
-#include <tuple>
-#include <type_traits>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/hash/internal/spy_hash_state.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/str_cat.h"
-#include "absl/types/variant.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Run the absl::Hash algorithm over all the elements passed in and verify that
-// their hash expansion is congruent with their `==` operator.
-//
-// It is used in conjunction with EXPECT_TRUE. Failures will output information
-// on what requirement failed and on which objects.
-//
-// Users should pass a collection of types as either an initializer list or a
-// container of cases.
-//
-//   EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-//       {v1, v2, ..., vN}));
-//
-//   std::vector<MyType> cases;
-//   // Fill cases...
-//   EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(cases));
-//
-// Users can pass a variety of types for testing heterogeneous lookup with
-// `std::make_tuple`:
-//
-//   EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-//       std::make_tuple(v1, v2, ..., vN)));
-//
-//
-// Ideally, the values passed should provide enough coverage of the `==`
-// operator and the AbslHashValue implementations.
-// For dynamically sized types, the empty state should usually be included in
-// the values.
-//
-// The function accepts an optional comparator function, in case that `==` is
-// not enough for the values provided.
-//
-// Usage:
-//
-//   EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-//       std::make_tuple(v1, v2, ..., vN), MyCustomEq{}));
-//
-// It checks the following requirements:
-//   1. The expansion for a value is deterministic.
-//   2. For any two objects `a` and `b` in the sequence, if `a == b` evaluates
-//      to true, then their hash expansion must be equal.
-//   3. If `a == b` evaluates to false their hash expansion must be unequal.
-//   4. If `a == b` evaluates to false neither hash expansion can be a
-//      suffix of the other.
-//   5. AbslHashValue overloads should not be called by the user. They are only
-//      meant to be called by the framework. Users should call H::combine() and
-//      H::combine_contiguous().
-//   6. No moved-from instance of the hash state is used in the implementation
-//      of AbslHashValue.
-//
-// The values do not have to have the same type. This can be useful for
-// equivalent types that support heterogeneous lookup.
-//
-// A possible reason for breaking (2) is combining state in the hash expansion
-// that was not used in `==`.
-// For example:
-//
-// struct Bad2 {
-//   int a, b;
-//   template <typename H>
-//   friend H AbslHashValue(H state, Bad2 x) {
-//     // Uses a and b.
-//     return H::combine(std::move(state), x.a, x.b);
-//   }
-//   friend bool operator==(Bad2 x, Bad2 y) {
-//     // Only uses a.
-//     return x.a == y.a;
-//   }
-// };
-//
-// As for (3), breaking this usually means that there is state being passed to
-// the `==` operator that is not used in the hash expansion.
-// For example:
-//
-// struct Bad3 {
-//   int a, b;
-//   template <typename H>
-//   friend H AbslHashValue(H state, Bad3 x) {
-//     // Only uses a.
-//     return H::combine(std::move(state), x.a);
-//   }
-//   friend bool operator==(Bad3 x, Bad3 y) {
-//     // Uses a and b.
-//     return x.a == y.a && x.b == y.b;
-//   }
-// };
-//
-// Finally, a common way to break 4 is by combining dynamic ranges without
-// combining the size of the range.
-// For example:
-//
-// struct Bad4 {
-//   int *p, size;
-//   template <typename H>
-//   friend H AbslHashValue(H state, Bad4 x) {
-//     return H::combine_contiguous(std::move(state), x.p, x.p + x.size);
-//   }
-//   friend bool operator==(Bad4 x, Bad4 y) {
-//    // Compare two ranges for equality. C++14 code can instead use std::equal.
-//     return absl::equal(x.p, x.p + x.size, y.p, y.p + y.size);
-//   }
-// };
-//
-// An easy solution to this is to combine the size after combining the range,
-// like so:
-// template <typename H>
-// friend H AbslHashValue(H state, Bad4 x) {
-//   return H::combine(
-//       H::combine_contiguous(std::move(state), x.p, x.p + x.size), x.size);
-// }
-//
-template <int&... ExplicitBarrier, typename Container>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(const Container& values);
-
-template <int&... ExplicitBarrier, typename Container, typename Eq>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(const Container& values, Eq equals);
-
-template <int&..., typename T>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(std::initializer_list<T> values);
-
-template <int&..., typename T, typename Eq>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(std::initializer_list<T> values,
-                                      Eq equals);
-
-namespace hash_internal {
-
-struct PrintVisitor {
-  size_t index;
-  template <typename T>
-  std::string operator()(const T* value) const {
-    return absl::StrCat("#", index, "(", testing::PrintToString(*value), ")");
-  }
-};
-
-template <typename Eq>
-struct EqVisitor {
-  Eq eq;
-  template <typename T, typename U>
-  bool operator()(const T* t, const U* u) const {
-    return eq(*t, *u);
-  }
-};
-
-struct ExpandVisitor {
-  template <typename T>
-  SpyHashState operator()(const T* value) const {
-    return SpyHashState::combine(SpyHashState(), *value);
-  }
-};
-
-template <typename Container, typename Eq>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(const Container& values, Eq equals) {
-  using V = typename Container::value_type;
-
-  struct Info {
-    const V& value;
-    size_t index;
-    std::string ToString() const {
-      return absl::visit(PrintVisitor{index}, value);
-    }
-    SpyHashState expand() const { return absl::visit(ExpandVisitor{}, value); }
-  };
-
-  using EqClass = std::vector<Info>;
-  std::vector<EqClass> classes;
-
-  // Gather the values in equivalence classes.
-  size_t i = 0;
-  for (const auto& value : values) {
-    EqClass* c = nullptr;
-    for (auto& eqclass : classes) {
-      if (absl::visit(EqVisitor<Eq>{equals}, value, eqclass[0].value)) {
-        c = &eqclass;
-        break;
-      }
-    }
-    if (c == nullptr) {
-      classes.emplace_back();
-      c = &classes.back();
-    }
-    c->push_back({value, i});
-    ++i;
-
-    // Verify potential errors captured by SpyHashState.
-    if (auto error = c->back().expand().error()) {
-      return testing::AssertionFailure() << *error;
-    }
-  }
-
-  if (classes.size() < 2) {
-    return testing::AssertionFailure()
-           << "At least two equivalence classes are expected.";
-  }
-
-  // We assume that equality is correctly implemented.
-  // Now we verify that AbslHashValue is also correctly implemented.
-
-  for (const auto& c : classes) {
-    // All elements of the equivalence class must have the same hash
-    // expansion.
-    const SpyHashState expected = c[0].expand();
-    for (const Info& v : c) {
-      if (v.expand() != v.expand()) {
-        return testing::AssertionFailure()
-               << "Hash expansion for " << v.ToString()
-               << " is non-deterministic.";
-      }
-      if (v.expand() != expected) {
-        return testing::AssertionFailure()
-               << "Values " << c[0].ToString() << " and " << v.ToString()
-               << " evaluate as equal but have an unequal hash expansion.";
-      }
-    }
-
-    // Elements from other classes must have different hash expansion.
-    for (const auto& c2 : classes) {
-      if (&c == &c2) continue;
-      const SpyHashState c2_hash = c2[0].expand();
-      switch (SpyHashState::Compare(expected, c2_hash)) {
-        case SpyHashState::CompareResult::kEqual:
-          return testing::AssertionFailure()
-                 << "Values " << c[0].ToString() << " and " << c2[0].ToString()
-                 << " evaluate as unequal but have an equal hash expansion.";
-        case SpyHashState::CompareResult::kBSuffixA:
-          return testing::AssertionFailure()
-                 << "Hash expansion of " << c2[0].ToString()
-                 << " is a suffix of the hash expansion of " << c[0].ToString()
-                 << ".";
-        case SpyHashState::CompareResult::kASuffixB:
-          return testing::AssertionFailure()
-                 << "Hash expansion of " << c[0].ToString()
-                 << " is a suffix of the hash expansion of " << c2[0].ToString()
-                 << ".";
-        case SpyHashState::CompareResult::kUnequal:
-          break;
-      }
-    }
-  }
-  return testing::AssertionSuccess();
-}
-
-template <typename... T>
-struct TypeSet {
-  template <typename U, bool = disjunction<std::is_same<T, U>...>::value>
-  struct Insert {
-    using type = TypeSet<U, T...>;
-  };
-  template <typename U>
-  struct Insert<U, true> {
-    using type = TypeSet;
-  };
-
-  template <template <typename...> class C>
-  using apply = C<T...>;
-};
-
-template <typename... T>
-struct MakeTypeSet : TypeSet<> {};
-template <typename T, typename... Ts>
-struct MakeTypeSet<T, Ts...> : MakeTypeSet<Ts...>::template Insert<T>::type {};
-
-template <typename... T>
-using VariantForTypes = typename MakeTypeSet<
-    const typename std::decay<T>::type*...>::template apply<absl::variant>;
-
-template <typename Container>
-struct ContainerAsVector {
-  using V = absl::variant<const typename Container::value_type*>;
-  using Out = std::vector<V>;
-
-  static Out Do(const Container& values) {
-    Out out;
-    for (const auto& v : values) out.push_back(&v);
-    return out;
-  }
-};
-
-template <typename... T>
-struct ContainerAsVector<std::tuple<T...>> {
-  using V = VariantForTypes<T...>;
-  using Out = std::vector<V>;
-
-  template <size_t... I>
-  static Out DoImpl(const std::tuple<T...>& tuple, absl::index_sequence<I...>) {
-    return Out{&std::get<I>(tuple)...};
-  }
-
-  static Out Do(const std::tuple<T...>& values) {
-    return DoImpl(values, absl::index_sequence_for<T...>());
-  }
-};
-
-template <>
-struct ContainerAsVector<std::tuple<>> {
-  static std::vector<VariantForTypes<int>> Do(std::tuple<>) { return {}; }
-};
-
-struct DefaultEquals {
-  template <typename T, typename U>
-  bool operator()(const T& t, const U& u) const {
-    return t == u;
-  }
-};
-
-}  // namespace hash_internal
-
-template <int&..., typename Container>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(const Container& values) {
-  return hash_internal::VerifyTypeImplementsAbslHashCorrectly(
-      hash_internal::ContainerAsVector<Container>::Do(values),
-      hash_internal::DefaultEquals{});
-}
-
-template <int&..., typename Container, typename Eq>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(const Container& values, Eq equals) {
-  return hash_internal::VerifyTypeImplementsAbslHashCorrectly(
-      hash_internal::ContainerAsVector<Container>::Do(values), equals);
-}
-
-template <int&..., typename T>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(std::initializer_list<T> values) {
-  return hash_internal::VerifyTypeImplementsAbslHashCorrectly(
-      hash_internal::ContainerAsVector<std::initializer_list<T>>::Do(values),
-      hash_internal::DefaultEquals{});
-}
-
-template <int&..., typename T, typename Eq>
-ABSL_MUST_USE_RESULT testing::AssertionResult
-VerifyTypeImplementsAbslHashCorrectly(std::initializer_list<T> values,
-                                      Eq equals) {
-  return hash_internal::VerifyTypeImplementsAbslHashCorrectly(
-      hash_internal::ContainerAsVector<std::initializer_list<T>>::Do(values),
-      equals);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_HASH_TESTING_H_
diff --git a/third_party/abseil/absl/hash/internal/city.cc b/third_party/abseil/absl/hash/internal/city.cc
deleted file mode 100644
index 5460134..0000000
--- a/third_party/abseil/absl/hash/internal/city.cc
+++ /dev/null
@@ -1,349 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file provides CityHash64() and related functions.
-//
-// It's probably possible to create even faster hash functions by
-// writing a program that systematically explores some of the space of
-// possible hash functions, by using SIMD instructions, or by
-// compromising on hash quality.
-
-#include "absl/hash/internal/city.h"
-
-#include <string.h>  // for memcpy and memset
-#include <algorithm>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-#ifdef ABSL_IS_BIG_ENDIAN
-#define uint32_in_expected_order(x) (absl::gbswap_32(x))
-#define uint64_in_expected_order(x) (absl::gbswap_64(x))
-#else
-#define uint32_in_expected_order(x) (x)
-#define uint64_in_expected_order(x) (x)
-#endif
-
-static uint64_t Fetch64(const char *p) {
-  return uint64_in_expected_order(ABSL_INTERNAL_UNALIGNED_LOAD64(p));
-}
-
-static uint32_t Fetch32(const char *p) {
-  return uint32_in_expected_order(ABSL_INTERNAL_UNALIGNED_LOAD32(p));
-}
-
-// Some primes between 2^63 and 2^64 for various uses.
-static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
-static const uint64_t k1 = 0xb492b66fbe98f273ULL;
-static const uint64_t k2 = 0x9ae16a3b2f90404fULL;
-
-// Magic numbers for 32-bit hashing.  Copied from Murmur3.
-static const uint32_t c1 = 0xcc9e2d51;
-static const uint32_t c2 = 0x1b873593;
-
-// A 32-bit to 32-bit integer hash copied from Murmur3.
-static uint32_t fmix(uint32_t h) {
-  h ^= h >> 16;
-  h *= 0x85ebca6b;
-  h ^= h >> 13;
-  h *= 0xc2b2ae35;
-  h ^= h >> 16;
-  return h;
-}
-
-static uint32_t Rotate32(uint32_t val, int shift) {
-  // Avoid shifting by 32: doing so yields an undefined result.
-  return shift == 0 ? val : ((val >> shift) | (val << (32 - shift)));
-}
-
-#undef PERMUTE3
-#define PERMUTE3(a, b, c) \
-  do {                    \
-    std::swap(a, b);      \
-    std::swap(a, c);      \
-  } while (0)
-
-static uint32_t Mur(uint32_t a, uint32_t h) {
-  // Helper from Murmur3 for combining two 32-bit values.
-  a *= c1;
-  a = Rotate32(a, 17);
-  a *= c2;
-  h ^= a;
-  h = Rotate32(h, 19);
-  return h * 5 + 0xe6546b64;
-}
-
-static uint32_t Hash32Len13to24(const char *s, size_t len) {
-  uint32_t a = Fetch32(s - 4 + (len >> 1));
-  uint32_t b = Fetch32(s + 4);
-  uint32_t c = Fetch32(s + len - 8);
-  uint32_t d = Fetch32(s + (len >> 1));
-  uint32_t e = Fetch32(s);
-  uint32_t f = Fetch32(s + len - 4);
-  uint32_t h = len;
-
-  return fmix(Mur(f, Mur(e, Mur(d, Mur(c, Mur(b, Mur(a, h)))))));
-}
-
-static uint32_t Hash32Len0to4(const char *s, size_t len) {
-  uint32_t b = 0;
-  uint32_t c = 9;
-  for (size_t i = 0; i < len; i++) {
-    signed char v = s[i];
-    b = b * c1 + v;
-    c ^= b;
-  }
-  return fmix(Mur(b, Mur(len, c)));
-}
-
-static uint32_t Hash32Len5to12(const char *s, size_t len) {
-  uint32_t a = len, b = len * 5, c = 9, d = b;
-  a += Fetch32(s);
-  b += Fetch32(s + len - 4);
-  c += Fetch32(s + ((len >> 1) & 4));
-  return fmix(Mur(c, Mur(b, Mur(a, d))));
-}
-
-uint32_t CityHash32(const char *s, size_t len) {
-  if (len <= 24) {
-    return len <= 12
-               ? (len <= 4 ? Hash32Len0to4(s, len) : Hash32Len5to12(s, len))
-               : Hash32Len13to24(s, len);
-  }
-
-  // len > 24
-  uint32_t h = len, g = c1 * len, f = g;
-
-  uint32_t a0 = Rotate32(Fetch32(s + len - 4) * c1, 17) * c2;
-  uint32_t a1 = Rotate32(Fetch32(s + len - 8) * c1, 17) * c2;
-  uint32_t a2 = Rotate32(Fetch32(s + len - 16) * c1, 17) * c2;
-  uint32_t a3 = Rotate32(Fetch32(s + len - 12) * c1, 17) * c2;
-  uint32_t a4 = Rotate32(Fetch32(s + len - 20) * c1, 17) * c2;
-  h ^= a0;
-  h = Rotate32(h, 19);
-  h = h * 5 + 0xe6546b64;
-  h ^= a2;
-  h = Rotate32(h, 19);
-  h = h * 5 + 0xe6546b64;
-  g ^= a1;
-  g = Rotate32(g, 19);
-  g = g * 5 + 0xe6546b64;
-  g ^= a3;
-  g = Rotate32(g, 19);
-  g = g * 5 + 0xe6546b64;
-  f += a4;
-  f = Rotate32(f, 19);
-  f = f * 5 + 0xe6546b64;
-  size_t iters = (len - 1) / 20;
-  do {
-    uint32_t b0 = Rotate32(Fetch32(s) * c1, 17) * c2;
-    uint32_t b1 = Fetch32(s + 4);
-    uint32_t b2 = Rotate32(Fetch32(s + 8) * c1, 17) * c2;
-    uint32_t b3 = Rotate32(Fetch32(s + 12) * c1, 17) * c2;
-    uint32_t b4 = Fetch32(s + 16);
-    h ^= b0;
-    h = Rotate32(h, 18);
-    h = h * 5 + 0xe6546b64;
-    f += b1;
-    f = Rotate32(f, 19);
-    f = f * c1;
-    g += b2;
-    g = Rotate32(g, 18);
-    g = g * 5 + 0xe6546b64;
-    h ^= b3 + b1;
-    h = Rotate32(h, 19);
-    h = h * 5 + 0xe6546b64;
-    g ^= b4;
-    g = absl::gbswap_32(g) * 5;
-    h += b4 * 5;
-    h = absl::gbswap_32(h);
-    f += b0;
-    PERMUTE3(f, h, g);
-    s += 20;
-  } while (--iters != 0);
-  g = Rotate32(g, 11) * c1;
-  g = Rotate32(g, 17) * c1;
-  f = Rotate32(f, 11) * c1;
-  f = Rotate32(f, 17) * c1;
-  h = Rotate32(h + g, 19);
-  h = h * 5 + 0xe6546b64;
-  h = Rotate32(h, 17) * c1;
-  h = Rotate32(h + f, 19);
-  h = h * 5 + 0xe6546b64;
-  h = Rotate32(h, 17) * c1;
-  return h;
-}
-
-// Bitwise right rotate.  Normally this will compile to a single
-// instruction, especially if the shift is a manifest constant.
-static uint64_t Rotate(uint64_t val, int shift) {
-  // Avoid shifting by 64: doing so yields an undefined result.
-  return shift == 0 ? val : ((val >> shift) | (val << (64 - shift)));
-}
-
-static uint64_t ShiftMix(uint64_t val) { return val ^ (val >> 47); }
-
-static uint64_t HashLen16(uint64_t u, uint64_t v, uint64_t mul) {
-  // Murmur-inspired hashing.
-  uint64_t a = (u ^ v) * mul;
-  a ^= (a >> 47);
-  uint64_t b = (v ^ a) * mul;
-  b ^= (b >> 47);
-  b *= mul;
-  return b;
-}
-
-static uint64_t HashLen16(uint64_t u, uint64_t v) {
-  const uint64_t kMul = 0x9ddfea08eb382d69ULL;
-  return HashLen16(u, v, kMul);
-}
-
-static uint64_t HashLen0to16(const char *s, size_t len) {
-  if (len >= 8) {
-    uint64_t mul = k2 + len * 2;
-    uint64_t a = Fetch64(s) + k2;
-    uint64_t b = Fetch64(s + len - 8);
-    uint64_t c = Rotate(b, 37) * mul + a;
-    uint64_t d = (Rotate(a, 25) + b) * mul;
-    return HashLen16(c, d, mul);
-  }
-  if (len >= 4) {
-    uint64_t mul = k2 + len * 2;
-    uint64_t a = Fetch32(s);
-    return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
-  }
-  if (len > 0) {
-    uint8_t a = s[0];
-    uint8_t b = s[len >> 1];
-    uint8_t c = s[len - 1];
-    uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
-    uint32_t z = len + (static_cast<uint32_t>(c) << 2);
-    return ShiftMix(y * k2 ^ z * k0) * k2;
-  }
-  return k2;
-}
-
-// This probably works well for 16-byte strings as well, but it may be overkill
-// in that case.
-static uint64_t HashLen17to32(const char *s, size_t len) {
-  uint64_t mul = k2 + len * 2;
-  uint64_t a = Fetch64(s) * k1;
-  uint64_t b = Fetch64(s + 8);
-  uint64_t c = Fetch64(s + len - 8) * mul;
-  uint64_t d = Fetch64(s + len - 16) * k2;
-  return HashLen16(Rotate(a + b, 43) + Rotate(c, 30) + d,
-                   a + Rotate(b + k2, 18) + c, mul);
-}
-
-// Return a 16-byte hash for 48 bytes.  Quick and dirty.
-// Callers do best to use "random-looking" values for a and b.
-static std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
-    uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
-  a += w;
-  b = Rotate(b + a + z, 21);
-  uint64_t c = a;
-  a += x;
-  a += y;
-  b += Rotate(a, 44);
-  return std::make_pair(a + z, b + c);
-}
-
-// Return a 16-byte hash for s[0] ... s[31], a, and b.  Quick and dirty.
-static std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(const char *s,
-                                                            uint64_t a,
-                                                            uint64_t b) {
-  return WeakHashLen32WithSeeds(Fetch64(s), Fetch64(s + 8), Fetch64(s + 16),
-                                Fetch64(s + 24), a, b);
-}
-
-// Return an 8-byte hash for 33 to 64 bytes.
-static uint64_t HashLen33to64(const char *s, size_t len) {
-  uint64_t mul = k2 + len * 2;
-  uint64_t a = Fetch64(s) * k2;
-  uint64_t b = Fetch64(s + 8);
-  uint64_t c = Fetch64(s + len - 24);
-  uint64_t d = Fetch64(s + len - 32);
-  uint64_t e = Fetch64(s + 16) * k2;
-  uint64_t f = Fetch64(s + 24) * 9;
-  uint64_t g = Fetch64(s + len - 8);
-  uint64_t h = Fetch64(s + len - 16) * mul;
-  uint64_t u = Rotate(a + g, 43) + (Rotate(b, 30) + c) * 9;
-  uint64_t v = ((a + g) ^ d) + f + 1;
-  uint64_t w = absl::gbswap_64((u + v) * mul) + h;
-  uint64_t x = Rotate(e + f, 42) + c;
-  uint64_t y = (absl::gbswap_64((v + w) * mul) + g) * mul;
-  uint64_t z = e + f + c;
-  a = absl::gbswap_64((x + z) * mul + y) + b;
-  b = ShiftMix((z + a) * mul + d + h) * mul;
-  return b + x;
-}
-
-uint64_t CityHash64(const char *s, size_t len) {
-  if (len <= 32) {
-    if (len <= 16) {
-      return HashLen0to16(s, len);
-    } else {
-      return HashLen17to32(s, len);
-    }
-  } else if (len <= 64) {
-    return HashLen33to64(s, len);
-  }
-
-  // For strings over 64 bytes we hash the end first, and then as we
-  // loop we keep 56 bytes of state: v, w, x, y, and z.
-  uint64_t x = Fetch64(s + len - 40);
-  uint64_t y = Fetch64(s + len - 16) + Fetch64(s + len - 56);
-  uint64_t z = HashLen16(Fetch64(s + len - 48) + len, Fetch64(s + len - 24));
-  std::pair<uint64_t, uint64_t> v =
-      WeakHashLen32WithSeeds(s + len - 64, len, z);
-  std::pair<uint64_t, uint64_t> w =
-      WeakHashLen32WithSeeds(s + len - 32, y + k1, x);
-  x = x * k1 + Fetch64(s);
-
-  // Decrease len to the nearest multiple of 64, and operate on 64-byte chunks.
-  len = (len - 1) & ~static_cast<size_t>(63);
-  do {
-    x = Rotate(x + y + v.first + Fetch64(s + 8), 37) * k1;
-    y = Rotate(y + v.second + Fetch64(s + 48), 42) * k1;
-    x ^= w.second;
-    y += v.first + Fetch64(s + 40);
-    z = Rotate(z + w.first, 33) * k1;
-    v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
-    w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch64(s + 16));
-    std::swap(z, x);
-    s += 64;
-    len -= 64;
-  } while (len != 0);
-  return HashLen16(HashLen16(v.first, w.first) + ShiftMix(y) * k1 + z,
-                   HashLen16(v.second, w.second) + x);
-}
-
-uint64_t CityHash64WithSeed(const char *s, size_t len, uint64_t seed) {
-  return CityHash64WithSeeds(s, len, k2, seed);
-}
-
-uint64_t CityHash64WithSeeds(const char *s, size_t len, uint64_t seed0,
-                             uint64_t seed1) {
-  return HashLen16(CityHash64(s, len) - seed0, seed1);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/hash/internal/city.h b/third_party/abseil/absl/hash/internal/city.h
deleted file mode 100644
index 393da0b..0000000
--- a/third_party/abseil/absl/hash/internal/city.h
+++ /dev/null
@@ -1,78 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// https://code.google.com/p/cityhash/
-//
-// This file provides a few functions for hashing strings.  All of them are
-// high-quality functions in the sense that they pass standard tests such
-// as Austin Appleby's SMHasher.  They are also fast.
-//
-// For 64-bit x86 code, on short strings, we don't know of anything faster than
-// CityHash64 that is of comparable quality.  We believe our nearest competitor
-// is Murmur3.  For 64-bit x86 code, CityHash64 is an excellent choice for hash
-// tables and most other hashing (excluding cryptography).
-//
-// For 32-bit x86 code, we don't know of anything faster than CityHash32 that
-// is of comparable quality.  We believe our nearest competitor is Murmur3A.
-// (On 64-bit CPUs, it is typically faster to use the other CityHash variants.)
-//
-// Functions in the CityHash family are not suitable for cryptography.
-//
-// Please see CityHash's README file for more details on our performance
-// measurements and so on.
-//
-// WARNING: This code has been only lightly tested on big-endian platforms!
-// It is known to work well on little-endian platforms that have a small penalty
-// for unaligned reads, such as current Intel and AMD moderate-to-high-end CPUs.
-// It should work on all 32-bit and 64-bit platforms that allow unaligned reads;
-// bug reports are welcome.
-//
-// By the way, for some hash functions, given strings a and b, the hash
-// of a+b is easily derived from the hashes of a and b.  This property
-// doesn't hold for any hash functions in this file.
-
-#ifndef ABSL_HASH_INTERNAL_CITY_H_
-#define ABSL_HASH_INTERNAL_CITY_H_
-
-#include <stdint.h>
-#include <stdlib.h>  // for size_t.
-
-#include <utility>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// Hash function for a byte array.
-uint64_t CityHash64(const char *s, size_t len);
-
-// Hash function for a byte array.  For convenience, a 64-bit seed is also
-// hashed into the result.
-uint64_t CityHash64WithSeed(const char *s, size_t len, uint64_t seed);
-
-// Hash function for a byte array.  For convenience, two seeds are also
-// hashed into the result.
-uint64_t CityHash64WithSeeds(const char *s, size_t len, uint64_t seed0,
-                             uint64_t seed1);
-
-// Hash function for a byte array.  Most useful in 32-bit binaries.
-uint32_t CityHash32(const char *s, size_t len);
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_CITY_H_
diff --git a/third_party/abseil/absl/hash/internal/city_test.cc b/third_party/abseil/absl/hash/internal/city_test.cc
deleted file mode 100644
index 251d381..0000000
--- a/third_party/abseil/absl/hash/internal/city_test.cc
+++ /dev/null
@@ -1,595 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/hash/internal/city.h"
-
-#include <string.h>
-#include <cstdio>
-#include <iostream>
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
-static const uint64_t kSeed0 = 1234567;
-static const uint64_t kSeed1 = k0;
-static const int kDataSize = 1 << 20;
-static const int kTestSize = 300;
-
-static char data[kDataSize];
-
-// Initialize data to pseudorandom values.
-void setup() {
-  uint64_t a = 9;
-  uint64_t b = 777;
-  for (int i = 0; i < kDataSize; i++) {
-    a += b;
-    b += a;
-    a = (a ^ (a >> 41)) * k0;
-    b = (b ^ (b >> 41)) * k0 + i;
-    uint8_t u = b >> 37;
-    memcpy(data + i, &u, 1);  // uint8_t -> char
-  }
-}
-
-#define C(x) 0x##x##ULL
-static const uint64_t testdata[kTestSize][4] = {
-    {C(9ae16a3b2f90404f), C(75106db890237a4a), C(3feac5f636039766),
-     C(dc56d17a)},
-    {C(541150e87f415e96), C(1aef0d24b3148a1a), C(bacc300e1e82345a),
-     C(99929334)},
-    {C(f3786a4b25827c1), C(34ee1a2bf767bd1c), C(2f15ca2ebfb631f2), C(4252edb7)},
-    {C(ef923a7a1af78eab), C(79163b1e1e9a9b18), C(df3b2aca6e1e4a30),
-     C(ebc34f3c)},
-    {C(11df592596f41d88), C(843ec0bce9042f9c), C(cce2ea1e08b1eb30),
-     C(26f2b463)},
-    {C(831f448bdc5600b3), C(62a24be3120a6919), C(1b44098a41e010da),
-     C(b042c047)},
-    {C(3eca803e70304894), C(d80de767e4a920a), C(a51cfbb292efd53d), C(e73bb0a8)},
-    {C(1b5a063fb4c7f9f1), C(318dbc24af66dee9), C(10ef7b32d5c719af),
-     C(91dfdd75)},
-    {C(a0f10149a0e538d6), C(69d008c20f87419f), C(41b36376185b3e9e),
-     C(c87f95de)},
-    {C(fb8d9c70660b910b), C(a45b0cc3476bff1b), C(b28d1996144f0207),
-     C(3f5538ef)},
-    {C(236827beae282a46), C(e43970221139c946), C(4f3ac6faa837a3aa),
-     C(70eb1a1f)},
-    {C(c385e435136ecf7c), C(d9d17368ff6c4a08), C(1b31eed4e5251a67),
-     C(cfd63b83)},
-    {C(e3f6828b6017086d), C(21b4d1900554b3b0), C(bef38be1809e24f1),
-     C(894a52ef)},
-    {C(851fff285561dca0), C(4d1277d73cdf416f), C(28ccffa61010ebe2),
-     C(9cde6a54)},
-    {C(61152a63595a96d9), C(d1a3a91ef3a7ba45), C(443b6bb4a493ad0c),
-     C(6c4898d5)},
-    {C(44473e03be306c88), C(30097761f872472a), C(9fd1b669bfad82d7),
-     C(13e1978e)},
-    {C(3ead5f21d344056), C(fb6420393cfb05c3), C(407932394cbbd303), C(51b4ba8)},
-    {C(6abbfde37ee03b5b), C(83febf188d2cc113), C(cda7b62d94d5b8ee),
-     C(b6b06e40)},
-    {C(943e7ed63b3c080), C(1ef207e9444ef7f8), C(ef4a9f9f8c6f9b4a), C(240a2f2)},
-    {C(d72ce05171ef8a1a), C(c6bd6bd869203894), C(c760e6396455d23a),
-     C(5dcefc30)},
-    {C(4182832b52d63735), C(337097e123eea414), C(b5a72ca0456df910),
-     C(7a48b105)},
-    {C(d6cdae892584a2cb), C(58de0fa4eca17dcd), C(43df30b8f5f1cb00),
-     C(fd55007b)},
-    {C(5c8e90bc267c5ee4), C(e9ae044075d992d9), C(f234cbfd1f0a1e59),
-     C(6b95894c)},
-    {C(bbd7f30ac310a6f3), C(b23b570d2666685f), C(fb13fb08c9814fe7),
-     C(3360e827)},
-    {C(36a097aa49519d97), C(8204380a73c4065), C(77c2004bdd9e276a), C(45177e0b)},
-    {C(dc78cb032c49217), C(112464083f83e03a), C(96ae53e28170c0f5), C(7c6fffe4)},
-    {C(441593e0da922dfe), C(936ef46061469b32), C(204a1921197ddd87),
-     C(bbc78da4)},
-    {C(2ba3883d71cc2133), C(72f2bbb32bed1a3c), C(27e1bd96d4843251),
-     C(c5c25d39)},
-    {C(f2b6d2adf8423600), C(7514e2f016a48722), C(43045743a50396ba),
-     C(b6e5d06e)},
-    {C(38fffe7f3680d63c), C(d513325255a7a6d1), C(31ed47790f6ca62f),
-     C(6178504e)},
-    {C(b7477bf0b9ce37c6), C(63b1c580a7fd02a4), C(f6433b9f10a5dac), C(bd4c3637)},
-    {C(55bdb0e71e3edebd), C(c7ab562bcf0568bc), C(43166332f9ee684f),
-     C(6e7ac474)},
-    {C(782fa1b08b475e7), C(fb7138951c61b23b), C(9829105e234fb11e), C(1fb4b518)},
-    {C(c5dc19b876d37a80), C(15ffcff666cfd710), C(e8c30c72003103e2),
-     C(31d13d6d)},
-    {C(5e1141711d2d6706), C(b537f6dee8de6933), C(3af0a1fbbe027c54),
-     C(26fa72e3)},
-    {C(782edf6da001234f), C(f48cbd5c66c48f3), C(808754d1e64e2a32), C(6a7433bf)},
-    {C(d26285842ff04d44), C(8f38d71341eacca9), C(5ca436f4db7a883c),
-     C(4e6df758)},
-    {C(c6ab830865a6bae6), C(6aa8e8dd4b98815c), C(efe3846713c371e5),
-     C(d57f63ea)},
-    {C(44b3a1929232892), C(61dca0e914fc217), C(a607cc142096b964), C(52ef73b3)},
-    {C(4b603d7932a8de4f), C(fae64c464b8a8f45), C(8fafab75661d602a), C(3cb36c3)},
-    {C(4ec0b54cf1566aff), C(30d2c7269b206bf4), C(77c22e82295e1061),
-     C(72c39bea)},
-    {C(ed8b7a4b34954ff7), C(56432de31f4ee757), C(85bd3abaa572b155),
-     C(a65aa25c)},
-    {C(5d28b43694176c26), C(714cc8bc12d060ae), C(3437726273a83fe6),
-     C(74740539)},
-    {C(6a1ef3639e1d202e), C(919bc1bd145ad928), C(30f3f7e48c28a773),
-     C(c3ae3c26)},
-    {C(159f4d9e0307b111), C(3e17914a5675a0c), C(af849bd425047b51), C(f29db8a2)},
-    {C(cc0a840725a7e25b), C(57c69454396e193a), C(976eaf7eee0b4540),
-     C(1ef4cbf4)},
-    {C(a2b27ee22f63c3f1), C(9ebde0ce1b3976b2), C(2fe6a92a257af308),
-     C(a9be6c41)},
-    {C(d8f2f234899bcab3), C(b10b037297c3a168), C(debea2c510ceda7f), C(fa31801)},
-    {C(584f28543864844f), C(d7cee9fc2d46f20d), C(a38dca5657387205),
-     C(8331c5d8)},
-    {C(a94be46dd9aa41af), C(a57e5b7723d3f9bd), C(34bf845a52fd2f), C(e9876db8)},
-    {C(9a87bea227491d20), C(a468657e2b9c43e7), C(af9ba60db8d89ef7),
-     C(27b0604e)},
-    {C(27688c24958d1a5c), C(e3b4a1c9429cf253), C(48a95811f70d64bc),
-     C(dcec07f2)},
-    {C(5d1d37790a1873ad), C(ed9cd4bcc5fa1090), C(ce51cde05d8cd96a),
-     C(cff0a82a)},
-    {C(1f03fd18b711eea9), C(566d89b1946d381a), C(6e96e83fc92563ab),
-     C(fec83621)},
-    {C(f0316f286cf527b6), C(f84c29538de1aa5a), C(7612ed3c923d4a71), C(743d8dc)},
-    {C(297008bcb3e3401d), C(61a8e407f82b0c69), C(a4a35bff0524fa0e),
-     C(64d41d26)},
-    {C(43c6252411ee3be), C(b4ca1b8077777168), C(2746dc3f7da1737f), C(acd90c81)},
-    {C(ce38a9a54fad6599), C(6d6f4a90b9e8755e), C(c3ecc79ff105de3f),
-     C(7c746a4b)},
-    {C(270a9305fef70cf), C(600193999d884f3a), C(f4d49eae09ed8a1), C(b1047e99)},
-    {C(e71be7c28e84d119), C(eb6ace59932736e6), C(70c4397807ba12c5),
-     C(d1fd1068)},
-    {C(b5b58c24b53aaa19), C(d2a6ab0773dd897f), C(ef762fe01ecb5b97),
-     C(56486077)},
-    {C(44dd59bd301995cf), C(3ccabd76493ada1a), C(540db4c87d55ef23),
-     C(6069be80)},
-    {C(b4d4789eb6f2630b), C(bf6973263ce8ef0e), C(d1c75c50844b9d3), C(2078359b)},
-    {C(12807833c463737c), C(58e927ea3b3776b4), C(72dd20ef1c2f8ad0),
-     C(9ea21004)},
-    {C(e88419922b87176f), C(bcf32f41a7ddbf6f), C(d6ebefd8085c1a0f),
-     C(9c9cfe88)},
-    {C(105191e0ec8f7f60), C(5918dbfcca971e79), C(6b285c8a944767b9),
-     C(b70a6ddd)},
-    {C(a5b88bf7399a9f07), C(fca3ddfd96461cc4), C(ebe738fdc0282fc6),
-     C(dea37298)},
-    {C(d08c3f5747d84f50), C(4e708b27d1b6f8ac), C(70f70fd734888606),
-     C(8f480819)},
-    {C(2f72d12a40044b4b), C(889689352fec53de), C(f03e6ad87eb2f36), C(30b3b16)},
-    {C(aa1f61fdc5c2e11e), C(c2c56cd11277ab27), C(a1e73069fdf1f94f),
-     C(f31bc4e8)},
-    {C(9489b36fe2246244), C(3355367033be74b8), C(5f57c2277cbce516),
-     C(419f953b)},
-    {C(358d7c0476a044cd), C(e0b7b47bcbd8854f), C(ffb42ec696705519),
-     C(20e9e76d)},
-    {C(b0c48df14275265a), C(9da4448975905efa), C(d716618e414ceb6d),
-     C(646f0ff8)},
-    {C(daa70bb300956588), C(410ea6883a240c6d), C(f5c8239fb5673eb3),
-     C(eeb7eca8)},
-    {C(4ec97a20b6c4c7c2), C(5913b1cd454f29fd), C(a9629f9daf06d685), C(8112bb9)},
-    {C(5c3323628435a2e8), C(1bea45ce9e72a6e3), C(904f0a7027ddb52e),
-     C(85a6d477)},
-    {C(c1ef26bea260abdb), C(6ee423f2137f9280), C(df2118b946ed0b43),
-     C(56f76c84)},
-    {C(6be7381b115d653a), C(ed046190758ea511), C(de6a45ffc3ed1159),
-     C(9af45d55)},
-    {C(ae3eece1711b2105), C(14fd3f4027f81a4a), C(abb7e45177d151db),
-     C(d1c33760)},
-    {C(376c28588b8fb389), C(6b045e84d8491ed2), C(4e857effb7d4e7dc),
-     C(c56bbf69)},
-    {C(58d943503bb6748f), C(419c6c8e88ac70f6), C(586760cbf3d3d368),
-     C(abecfb9b)},
-    {C(dfff5989f5cfd9a1), C(bcee2e7ea3a96f83), C(681c7874adb29017),
-     C(8de13255)},
-    {C(7fb19eb1a496e8f5), C(d49e5dfdb5c0833f), C(c0d5d7b2f7c48dc7),
-     C(a98ee299)},
-    {C(5dba5b0dadccdbaa), C(4ba8da8ded87fcdc), C(f693fdd25badf2f0),
-     C(3015f556)},
-    {C(688bef4b135a6829), C(8d31d82abcd54e8e), C(f95f8a30d55036d7),
-     C(5a430e29)},
-    {C(d8323be05433a412), C(8d48fa2b2b76141d), C(3d346f23978336a5),
-     C(2797add0)},
-    {C(3b5404278a55a7fc), C(23ca0b327c2d0a81), C(a6d65329571c892c),
-     C(27d55016)},
-    {C(2a96a3f96c5e9bbc), C(8caf8566e212dda8), C(904de559ca16e45e),
-     C(84945a82)},
-    {C(22bebfdcc26d18ff), C(4b4d8dcb10807ba1), C(40265eee30c6b896),
-     C(3ef7e224)},
-    {C(627a2249ec6bbcc2), C(c0578b462a46735a), C(4974b8ee1c2d4f1f),
-     C(35ed8dc8)},
-    {C(3abaf1667ba2f3e0), C(ee78476b5eeadc1), C(7e56ac0a6ca4f3f4), C(6a75e43d)},
-    {C(3931ac68c5f1b2c9), C(efe3892363ab0fb0), C(40b707268337cd36),
-     C(235d9805)},
-    {C(b98fb0606f416754), C(46a6e5547ba99c1e), C(c909d82112a8ed2), C(f7d69572)},
-    {C(7f7729a33e58fcc4), C(2e4bc1e7a023ead4), C(e707008ea7ca6222),
-     C(bacd0199)},
-    {C(42a0aa9ce82848b3), C(57232730e6bee175), C(f89bb3f370782031),
-     C(e428f50e)},
-    {C(6b2c6d38408a4889), C(de3ef6f68fb25885), C(20754f456c203361),
-     C(81eaaad3)},
-    {C(930380a3741e862a), C(348d28638dc71658), C(89dedcfd1654ea0d),
-     C(addbd3e3)},
-    {C(94808b5d2aa25f9a), C(cec72968128195e0), C(d9f4da2bdc1e130f),
-     C(e66dbca0)},
-    {C(b31abb08ae6e3d38), C(9eb9a95cbd9e8223), C(8019e79b7ee94ea9),
-     C(afe11fd5)},
-    {C(dccb5534a893ea1a), C(ce71c398708c6131), C(fe2396315457c164),
-     C(a71a406f)},
-    {C(6369163565814de6), C(8feb86fb38d08c2f), C(4976933485cc9a20),
-     C(9d90eaf5)},
-    {C(edee4ff253d9f9b3), C(96ef76fb279ef0ad), C(a4d204d179db2460),
-     C(6665db10)},
-    {C(941993df6e633214), C(929bc1beca5b72c6), C(141fc52b8d55572d),
-     C(9c977cbf)},
-    {C(859838293f64cd4c), C(484403b39d44ad79), C(bf674e64d64b9339),
-     C(ee83ddd4)},
-    {C(c19b5648e0d9f555), C(328e47b2b7562993), C(e756b92ba4bd6a51), C(26519cc)},
-    {C(f963b63b9006c248), C(9e9bf727ffaa00bc), C(c73bacc75b917e3a),
-     C(a485a53f)},
-    {C(6a8aa0852a8c1f3b), C(c8f1e5e206a21016), C(2aa554aed1ebb524),
-     C(f62bc412)},
-    {C(740428b4d45e5fb8), C(4c95a4ce922cb0a5), C(e99c3ba78feae796),
-     C(8975a436)},
-    {C(658b883b3a872b86), C(2f0e303f0f64827a), C(975337e23dc45e1), C(94ff7f41)},
-    {C(6df0a977da5d27d4), C(891dd0e7cb19508), C(fd65434a0b71e680), C(760aa031)},
-    {C(a900275464ae07ef), C(11f2cfda34beb4a3), C(9abf91e5a1c38e4), C(3bda76df)},
-    {C(810bc8aa0c40bcb0), C(448a019568d01441), C(f60ec52f60d3aeae),
-     C(498e2e65)},
-    {C(22036327deb59ed7), C(adc05ceb97026a02), C(48bff0654262672b),
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-     C(b0c92948)},
-    {C(37235a096a8be435), C(d9b73130493589c2), C(3b1024f59378d3be),
-     C(c7171590)},
-    {C(763ad6ea2fe1c99d), C(cf7af5368ac1e26b), C(4d5e451b3bb8d3d4),
-     C(240a67fb)},
-    {C(ea627fc84cd1b857), C(85e372494520071f), C(69ec61800845780b),
-     C(e1843cd5)},
-    {C(1f2ffd79f2cdc0c8), C(726a1bc31b337aaa), C(678b7f275ef96434),
-     C(fda1452b)},
-    {C(39a9e146ec4b3210), C(f63f75802a78b1ac), C(e2e22539c94741c3),
-     C(a2cad330)},
-    {C(74cba303e2dd9d6d), C(692699b83289fad1), C(dfb9aa7874678480),
-     C(53467e16)},
-    {C(4cbc2b73a43071e0), C(56c5db4c4ca4e0b7), C(1b275a162f46bd3d),
-     C(da14a8d0)},
-    {C(875638b9715d2221), C(d9ba0615c0c58740), C(616d4be2dfe825aa),
-     C(67333551)},
-    {C(fb686b2782994a8d), C(edee60693756bb48), C(e6bc3cae0ded2ef5),
-     C(a0ebd66e)},
-    {C(ab21d81a911e6723), C(4c31b07354852f59), C(835da384c9384744),
-     C(4b769593)},
-    {C(33d013cc0cd46ecf), C(3de726423aea122c), C(116af51117fe21a9),
-     C(6aa75624)},
-    {C(8ca92c7cd39fae5d), C(317e620e1bf20f1), C(4f0b33bf2194b97f), C(602a3f96)},
-    {C(fdde3b03f018f43e), C(38f932946c78660), C(c84084ce946851ee), C(cd183c4d)},
-    {C(9c8502050e9c9458), C(d6d2a1a69964beb9), C(1675766f480229b5),
-     C(960a4d07)},
-    {C(348176ca2fa2fdd2), C(3a89c514cc360c2d), C(9f90b8afb318d6d0),
-     C(9ae998c4)},
-    {C(4a3d3dfbbaea130b), C(4e221c920f61ed01), C(553fd6cd1304531f),
-     C(74e2179d)},
-    {C(b371f768cdf4edb9), C(bdef2ace6d2de0f0), C(e05b4100f7f1baec),
-     C(ee9bae25)},
-    {C(7a1d2e96934f61f), C(eb1760ae6af7d961), C(887eb0da063005df), C(b66edf10)},
-    {C(8be53d466d4728f2), C(86a5ac8e0d416640), C(984aa464cdb5c8bb),
-     C(d6209737)},
-    {C(829677eb03abf042), C(43cad004b6bc2c0), C(f2f224756803971a), C(b994a88)},
-    {C(754435bae3496fc), C(5707fc006f094dcf), C(8951c86ab19d8e40), C(a05d43c0)},
-    {C(fda9877ea8e3805f), C(31e868b6ffd521b7), C(b08c90681fb6a0fd),
-     C(c79f73a8)},
-    {C(2e36f523ca8f5eb5), C(8b22932f89b27513), C(331cd6ecbfadc1bb),
-     C(a490aff5)},
-    {C(21a378ef76828208), C(a5c13037fa841da2), C(506d22a53fbe9812),
-     C(dfad65b4)},
-    {C(ccdd5600054b16ca), C(f78846e84204cb7b), C(1f9faec82c24eac9), C(1d07dfb)},
-    {C(7854468f4e0cabd0), C(3a3f6b4f098d0692), C(ae2423ec7799d30d),
-     C(416df9a0)},
-    {C(7f88db5346d8f997), C(88eac9aacc653798), C(68a4d0295f8eefa1),
-     C(1f8fb9cc)},
-    {C(bb3fb5fb01d60fcf), C(1b7cc0847a215eb6), C(1246c994437990a1),
-     C(7abf48e3)},
-    {C(2e783e1761acd84d), C(39158042bac975a0), C(1cd21c5a8071188d),
-     C(dea4e3dd)},
-    {C(392058251cf22acc), C(944ec4475ead4620), C(b330a10b5cb94166),
-     C(c6064f22)},
-    {C(adf5c1e5d6419947), C(2a9747bc659d28aa), C(95c5b8cb1f5d62c), C(743bed9c)},
-    {C(6bc1db2c2bee5aba), C(e63b0ed635307398), C(7b2eca111f30dbbc),
-     C(fce254d5)},
-    {C(b00f898229efa508), C(83b7590ad7f6985c), C(2780e70a0592e41d),
-     C(e47ec9d1)},
-    {C(b56eb769ce0d9a8c), C(ce196117bfbcaf04), C(b26c3c3797d66165),
-     C(334a145c)},
-    {C(70c0637675b94150), C(259e1669305b0a15), C(46e1dd9fd387a58d),
-     C(adec1e3c)},
-    {C(74c0b8a6821faafe), C(abac39d7491370e7), C(faf0b2a48a4e6aed),
-     C(f6a9fbf8)},
-    {C(5fb5e48ac7b7fa4f), C(a96170f08f5acbc7), C(bbf5c63d4f52a1e5),
-     C(5398210c)},
-};
-
-void TestUnchanging(const uint64_t* expected, int offset, int len) {
-  EXPECT_EQ(expected[0], CityHash64(data + offset, len));
-  EXPECT_EQ(expected[3], CityHash32(data + offset, len));
-  EXPECT_EQ(expected[1], CityHash64WithSeed(data + offset, len, kSeed0));
-  EXPECT_EQ(expected[2],
-            CityHash64WithSeeds(data + offset, len, kSeed0, kSeed1));
-}
-
-TEST(CityHashTest, Unchanging) {
-  setup();
-  int i = 0;
-  for (; i < kTestSize - 1; i++) {
-    TestUnchanging(testdata[i], i * i, i);
-  }
-  TestUnchanging(testdata[i], 0, kDataSize);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/hash/internal/hash.cc b/third_party/abseil/absl/hash/internal/hash.cc
deleted file mode 100644
index 1433eb9..0000000
--- a/third_party/abseil/absl/hash/internal/hash.cc
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/hash/internal/hash.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-uint64_t HashState::CombineLargeContiguousImpl32(uint64_t state,
-                                                 const unsigned char* first,
-                                                 size_t len) {
-  while (len >= PiecewiseChunkSize()) {
-    state =
-        Mix(state, absl::hash_internal::CityHash32(reinterpret_cast<const char*>(first),
-                                         PiecewiseChunkSize()));
-    len -= PiecewiseChunkSize();
-    first += PiecewiseChunkSize();
-  }
-  // Handle the remainder.
-  return CombineContiguousImpl(state, first, len,
-                               std::integral_constant<int, 4>{});
-}
-
-uint64_t HashState::CombineLargeContiguousImpl64(uint64_t state,
-                                                 const unsigned char* first,
-                                                 size_t len) {
-  while (len >= PiecewiseChunkSize()) {
-    state = Mix(state, Hash64(first, PiecewiseChunkSize()));
-    len -= PiecewiseChunkSize();
-    first += PiecewiseChunkSize();
-  }
-  // Handle the remainder.
-  return CombineContiguousImpl(state, first, len,
-                               std::integral_constant<int, 8>{});
-}
-
-ABSL_CONST_INIT const void* const HashState::kSeed = &kSeed;
-
-// The salt array used by Wyhash. This array is NOT the mechanism used to make
-// absl::Hash non-deterministic between program invocations.  See `Seed()` for
-// that mechanism.
-//
-// Any random values are fine. These values are just digits from the decimal
-// part of pi.
-// https://en.wikipedia.org/wiki/Nothing-up-my-sleeve_number
-constexpr uint64_t kWyhashSalt[5] = {
-    uint64_t{0x243F6A8885A308D3}, uint64_t{0x13198A2E03707344},
-    uint64_t{0xA4093822299F31D0}, uint64_t{0x082EFA98EC4E6C89},
-    uint64_t{0x452821E638D01377},
-};
-
-uint64_t HashState::WyhashImpl(const unsigned char* data, size_t len) {
-  return Wyhash(data, len, Seed(), kWyhashSalt);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/hash/internal/hash.h b/third_party/abseil/absl/hash/internal/hash.h
deleted file mode 100644
index eb3471d..0000000
--- a/third_party/abseil/absl/hash/internal/hash.h
+++ /dev/null
@@ -1,1016 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: hash.h
-// -----------------------------------------------------------------------------
-//
-#ifndef ABSL_HASH_INTERNAL_HASH_H_
-#define ABSL_HASH_INTERNAL_HASH_H_
-
-#include <algorithm>
-#include <array>
-#include <cmath>
-#include <cstring>
-#include <deque>
-#include <forward_list>
-#include <functional>
-#include <iterator>
-#include <limits>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "absl/base/internal/endian.h"
-#include "absl/base/port.h"
-#include "absl/container/fixed_array.h"
-#include "absl/hash/internal/wyhash.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-#include "absl/types/variant.h"
-#include "absl/utility/utility.h"
-#include "absl/hash/internal/city.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// Internal detail: Large buffers are hashed in smaller chunks.  This function
-// returns the size of these chunks.
-constexpr size_t PiecewiseChunkSize() { return 1024; }
-
-// PiecewiseCombiner
-//
-// PiecewiseCombiner is an internal-only helper class for hashing a piecewise
-// buffer of `char` or `unsigned char` as though it were contiguous.  This class
-// provides two methods:
-//
-//   H add_buffer(state, data, size)
-//   H finalize(state)
-//
-// `add_buffer` can be called zero or more times, followed by a single call to
-// `finalize`.  This will produce the same hash expansion as concatenating each
-// buffer piece into a single contiguous buffer, and passing this to
-// `H::combine_contiguous`.
-//
-//  Example usage:
-//    PiecewiseCombiner combiner;
-//    for (const auto& piece : pieces) {
-//      state = combiner.add_buffer(std::move(state), piece.data, piece.size);
-//    }
-//    return combiner.finalize(std::move(state));
-class PiecewiseCombiner {
- public:
-  PiecewiseCombiner() : position_(0) {}
-  PiecewiseCombiner(const PiecewiseCombiner&) = delete;
-  PiecewiseCombiner& operator=(const PiecewiseCombiner&) = delete;
-
-  // PiecewiseCombiner::add_buffer()
-  //
-  // Appends the given range of bytes to the sequence to be hashed, which may
-  // modify the provided hash state.
-  template <typename H>
-  H add_buffer(H state, const unsigned char* data, size_t size);
-  template <typename H>
-  H add_buffer(H state, const char* data, size_t size) {
-    return add_buffer(std::move(state),
-                      reinterpret_cast<const unsigned char*>(data), size);
-  }
-
-  // PiecewiseCombiner::finalize()
-  //
-  // Finishes combining the hash sequence, which may may modify the provided
-  // hash state.
-  //
-  // Once finalize() is called, add_buffer() may no longer be called. The
-  // resulting hash state will be the same as if the pieces passed to
-  // add_buffer() were concatenated into a single flat buffer, and then provided
-  // to H::combine_contiguous().
-  template <typename H>
-  H finalize(H state);
-
- private:
-  unsigned char buf_[PiecewiseChunkSize()];
-  size_t position_;
-};
-
-// HashStateBase
-//
-// A hash state object represents an intermediate state in the computation
-// of an unspecified hash algorithm. `HashStateBase` provides a CRTP style
-// base class for hash state implementations. Developers adding type support
-// for `absl::Hash` should not rely on any parts of the state object other than
-// the following member functions:
-//
-//   * HashStateBase::combine()
-//   * HashStateBase::combine_contiguous()
-//
-// A derived hash state class of type `H` must provide a static member function
-// with a signature similar to the following:
-//
-//    `static H combine_contiguous(H state, const unsigned char*, size_t)`.
-//
-// `HashStateBase` will provide a complete implementation for a hash state
-// object in terms of this method.
-//
-// Example:
-//
-//   // Use CRTP to define your derived class.
-//   struct MyHashState : HashStateBase<MyHashState> {
-//       static H combine_contiguous(H state, const unsigned char*, size_t);
-//       using MyHashState::HashStateBase::combine;
-//       using MyHashState::HashStateBase::combine_contiguous;
-//   };
-template <typename H>
-class HashStateBase {
- public:
-  // HashStateBase::combine()
-  //
-  // Combines an arbitrary number of values into a hash state, returning the
-  // updated state.
-  //
-  // Each of the value types `T` must be separately hashable by the Abseil
-  // hashing framework.
-  //
-  // NOTE:
-  //
-  //   state = H::combine(std::move(state), value1, value2, value3);
-  //
-  // is guaranteed to produce the same hash expansion as:
-  //
-  //   state = H::combine(std::move(state), value1);
-  //   state = H::combine(std::move(state), value2);
-  //   state = H::combine(std::move(state), value3);
-  template <typename T, typename... Ts>
-  static H combine(H state, const T& value, const Ts&... values);
-  static H combine(H state) { return state; }
-
-  // HashStateBase::combine_contiguous()
-  //
-  // Combines a contiguous array of `size` elements into a hash state, returning
-  // the updated state.
-  //
-  // NOTE:
-  //
-  //   state = H::combine_contiguous(std::move(state), data, size);
-  //
-  // is NOT guaranteed to produce the same hash expansion as a for-loop (it may
-  // perform internal optimizations).  If you need this guarantee, use the
-  // for-loop instead.
-  template <typename T>
-  static H combine_contiguous(H state, const T* data, size_t size);
-
-  using AbslInternalPiecewiseCombiner = PiecewiseCombiner;
-};
-
-// is_uniquely_represented
-//
-// `is_uniquely_represented<T>` is a trait class that indicates whether `T`
-// is uniquely represented.
-//
-// A type is "uniquely represented" if two equal values of that type are
-// guaranteed to have the same bytes in their underlying storage. In other
-// words, if `a == b`, then `memcmp(&a, &b, sizeof(T))` is guaranteed to be
-// zero. This property cannot be detected automatically, so this trait is false
-// by default, but can be specialized by types that wish to assert that they are
-// uniquely represented. This makes them eligible for certain optimizations.
-//
-// If you have any doubt whatsoever, do not specialize this template.
-// The default is completely safe, and merely disables some optimizations
-// that will not matter for most types. Specializing this template,
-// on the other hand, can be very hazardous.
-//
-// To be uniquely represented, a type must not have multiple ways of
-// representing the same value; for example, float and double are not
-// uniquely represented, because they have distinct representations for
-// +0 and -0. Furthermore, the type's byte representation must consist
-// solely of user-controlled data, with no padding bits and no compiler-
-// controlled data such as vptrs or sanitizer metadata. This is usually
-// very difficult to guarantee, because in most cases the compiler can
-// insert data and padding bits at its own discretion.
-//
-// If you specialize this template for a type `T`, you must do so in the file
-// that defines that type (or in this file). If you define that specialization
-// anywhere else, `is_uniquely_represented<T>` could have different meanings
-// in different places.
-//
-// The Enable parameter is meaningless; it is provided as a convenience,
-// to support certain SFINAE techniques when defining specializations.
-template <typename T, typename Enable = void>
-struct is_uniquely_represented : std::false_type {};
-
-// is_uniquely_represented<unsigned char>
-//
-// unsigned char is a synonym for "byte", so it is guaranteed to be
-// uniquely represented.
-template <>
-struct is_uniquely_represented<unsigned char> : std::true_type {};
-
-// is_uniquely_represented for non-standard integral types
-//
-// Integral types other than bool should be uniquely represented on any
-// platform that this will plausibly be ported to.
-template <typename Integral>
-struct is_uniquely_represented<
-    Integral, typename std::enable_if<std::is_integral<Integral>::value>::type>
-    : std::true_type {};
-
-// is_uniquely_represented<bool>
-//
-//
-template <>
-struct is_uniquely_represented<bool> : std::false_type {};
-
-// hash_bytes()
-//
-// Convenience function that combines `hash_state` with the byte representation
-// of `value`.
-template <typename H, typename T>
-H hash_bytes(H hash_state, const T& value) {
-  const unsigned char* start = reinterpret_cast<const unsigned char*>(&value);
-  return H::combine_contiguous(std::move(hash_state), start, sizeof(value));
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Basic Types
-// -----------------------------------------------------------------------------
-
-// Note: Default `AbslHashValue` implementations live in `hash_internal`. This
-// allows us to block lexical scope lookup when doing an unqualified call to
-// `AbslHashValue` below. User-defined implementations of `AbslHashValue` can
-// only be found via ADL.
-
-// AbslHashValue() for hashing bool values
-//
-// We use SFINAE to ensure that this overload only accepts bool, not types that
-// are convertible to bool.
-template <typename H, typename B>
-typename std::enable_if<std::is_same<B, bool>::value, H>::type AbslHashValue(
-    H hash_state, B value) {
-  return H::combine(std::move(hash_state),
-                    static_cast<unsigned char>(value ? 1 : 0));
-}
-
-// AbslHashValue() for hashing enum values
-template <typename H, typename Enum>
-typename std::enable_if<std::is_enum<Enum>::value, H>::type AbslHashValue(
-    H hash_state, Enum e) {
-  // In practice, we could almost certainly just invoke hash_bytes directly,
-  // but it's possible that a sanitizer might one day want to
-  // store data in the unused bits of an enum. To avoid that risk, we
-  // convert to the underlying type before hashing. Hopefully this will get
-  // optimized away; if not, we can reopen discussion with c-toolchain-team.
-  return H::combine(std::move(hash_state),
-                    static_cast<typename std::underlying_type<Enum>::type>(e));
-}
-// AbslHashValue() for hashing floating-point values
-template <typename H, typename Float>
-typename std::enable_if<std::is_same<Float, float>::value ||
-                            std::is_same<Float, double>::value,
-                        H>::type
-AbslHashValue(H hash_state, Float value) {
-  return hash_internal::hash_bytes(std::move(hash_state),
-                                   value == 0 ? 0 : value);
-}
-
-// Long double has the property that it might have extra unused bytes in it.
-// For example, in x86 sizeof(long double)==16 but it only really uses 80-bits
-// of it. This means we can't use hash_bytes on a long double and have to
-// convert it to something else first.
-template <typename H, typename LongDouble>
-typename std::enable_if<std::is_same<LongDouble, long double>::value, H>::type
-AbslHashValue(H hash_state, LongDouble value) {
-  const int category = std::fpclassify(value);
-  switch (category) {
-    case FP_INFINITE:
-      // Add the sign bit to differentiate between +Inf and -Inf
-      hash_state = H::combine(std::move(hash_state), std::signbit(value));
-      break;
-
-    case FP_NAN:
-    case FP_ZERO:
-    default:
-      // Category is enough for these.
-      break;
-
-    case FP_NORMAL:
-    case FP_SUBNORMAL:
-      // We can't convert `value` directly to double because this would have
-      // undefined behavior if the value is out of range.
-      // std::frexp gives us a value in the range (-1, -.5] or [.5, 1) that is
-      // guaranteed to be in range for `double`. The truncation is
-      // implementation defined, but that works as long as it is deterministic.
-      int exp;
-      auto mantissa = static_cast<double>(std::frexp(value, &exp));
-      hash_state = H::combine(std::move(hash_state), mantissa, exp);
-  }
-
-  return H::combine(std::move(hash_state), category);
-}
-
-// AbslHashValue() for hashing pointers
-template <typename H, typename T>
-H AbslHashValue(H hash_state, T* ptr) {
-  auto v = reinterpret_cast<uintptr_t>(ptr);
-  // Due to alignment, pointers tend to have low bits as zero, and the next few
-  // bits follow a pattern since they are also multiples of some base value.
-  // Mixing the pointer twice helps prevent stuck low bits for certain alignment
-  // values.
-  return H::combine(std::move(hash_state), v, v);
-}
-
-// AbslHashValue() for hashing nullptr_t
-template <typename H>
-H AbslHashValue(H hash_state, std::nullptr_t) {
-  return H::combine(std::move(hash_state), static_cast<void*>(nullptr));
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Composite Types
-// -----------------------------------------------------------------------------
-
-// is_hashable()
-//
-// Trait class which returns true if T is hashable by the absl::Hash framework.
-// Used for the AbslHashValue implementations for composite types below.
-template <typename T>
-struct is_hashable;
-
-// AbslHashValue() for hashing pairs
-template <typename H, typename T1, typename T2>
-typename std::enable_if<is_hashable<T1>::value && is_hashable<T2>::value,
-                        H>::type
-AbslHashValue(H hash_state, const std::pair<T1, T2>& p) {
-  return H::combine(std::move(hash_state), p.first, p.second);
-}
-
-// hash_tuple()
-//
-// Helper function for hashing a tuple. The third argument should
-// be an index_sequence running from 0 to tuple_size<Tuple> - 1.
-template <typename H, typename Tuple, size_t... Is>
-H hash_tuple(H hash_state, const Tuple& t, absl::index_sequence<Is...>) {
-  return H::combine(std::move(hash_state), std::get<Is>(t)...);
-}
-
-// AbslHashValue for hashing tuples
-template <typename H, typename... Ts>
-#if defined(_MSC_VER)
-// This SFINAE gets MSVC confused under some conditions. Let's just disable it
-// for now.
-H
-#else  // _MSC_VER
-typename std::enable_if<absl::conjunction<is_hashable<Ts>...>::value, H>::type
-#endif  // _MSC_VER
-AbslHashValue(H hash_state, const std::tuple<Ts...>& t) {
-  return hash_internal::hash_tuple(std::move(hash_state), t,
-                                   absl::make_index_sequence<sizeof...(Ts)>());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Pointers
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing unique_ptr
-template <typename H, typename T, typename D>
-H AbslHashValue(H hash_state, const std::unique_ptr<T, D>& ptr) {
-  return H::combine(std::move(hash_state), ptr.get());
-}
-
-// AbslHashValue for hashing shared_ptr
-template <typename H, typename T>
-H AbslHashValue(H hash_state, const std::shared_ptr<T>& ptr) {
-  return H::combine(std::move(hash_state), ptr.get());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for String-Like Types
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing strings
-//
-// All the string-like types supported here provide the same hash expansion for
-// the same character sequence. These types are:
-//
-//  - `absl::Cord`
-//  - `std::string` (and std::basic_string<char, std::char_traits<char>, A> for
-//      any allocator A)
-//  - `absl::string_view` and `std::string_view`
-//
-// For simplicity, we currently support only `char` strings. This support may
-// be broadened, if necessary, but with some caution - this overload would
-// misbehave in cases where the traits' `eq()` member isn't equivalent to `==`
-// on the underlying character type.
-template <typename H>
-H AbslHashValue(H hash_state, absl::string_view str) {
-  return H::combine(
-      H::combine_contiguous(std::move(hash_state), str.data(), str.size()),
-      str.size());
-}
-
-// Support std::wstring, std::u16string and std::u32string.
-template <typename Char, typename Alloc, typename H,
-          typename = absl::enable_if_t<std::is_same<Char, wchar_t>::value ||
-                                       std::is_same<Char, char16_t>::value ||
-                                       std::is_same<Char, char32_t>::value>>
-H AbslHashValue(
-    H hash_state,
-    const std::basic_string<Char, std::char_traits<Char>, Alloc>& str) {
-  return H::combine(
-      H::combine_contiguous(std::move(hash_state), str.data(), str.size()),
-      str.size());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Sequence Containers
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::array
-template <typename H, typename T, size_t N>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::array<T, N>& array) {
-  return H::combine_contiguous(std::move(hash_state), array.data(),
-                               array.size());
-}
-
-// AbslHashValue for hashing std::deque
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::deque<T, Allocator>& deque) {
-  // TODO(gromer): investigate a more efficient implementation taking
-  // advantage of the chunk structure.
-  for (const auto& t : deque) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), deque.size());
-}
-
-// AbslHashValue for hashing std::forward_list
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::forward_list<T, Allocator>& list) {
-  size_t size = 0;
-  for (const T& t : list) {
-    hash_state = H::combine(std::move(hash_state), t);
-    ++size;
-  }
-  return H::combine(std::move(hash_state), size);
-}
-
-// AbslHashValue for hashing std::list
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::list<T, Allocator>& list) {
-  for (const auto& t : list) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), list.size());
-}
-
-// AbslHashValue for hashing std::vector
-//
-// Do not use this for vector<bool>. It does not have a .data(), and a fallback
-// for std::hash<> is most likely faster.
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value && !std::is_same<T, bool>::value,
-                        H>::type
-AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
-  return H::combine(H::combine_contiguous(std::move(hash_state), vector.data(),
-                                          vector.size()),
-                    vector.size());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Ordered Associative Containers
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::map
-template <typename H, typename Key, typename T, typename Compare,
-          typename Allocator>
-typename std::enable_if<is_hashable<Key>::value && is_hashable<T>::value,
-                        H>::type
-AbslHashValue(H hash_state, const std::map<Key, T, Compare, Allocator>& map) {
-  for (const auto& t : map) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), map.size());
-}
-
-// AbslHashValue for hashing std::multimap
-template <typename H, typename Key, typename T, typename Compare,
-          typename Allocator>
-typename std::enable_if<is_hashable<Key>::value && is_hashable<T>::value,
-                        H>::type
-AbslHashValue(H hash_state,
-              const std::multimap<Key, T, Compare, Allocator>& map) {
-  for (const auto& t : map) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), map.size());
-}
-
-// AbslHashValue for hashing std::set
-template <typename H, typename Key, typename Compare, typename Allocator>
-typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
-    H hash_state, const std::set<Key, Compare, Allocator>& set) {
-  for (const auto& t : set) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), set.size());
-}
-
-// AbslHashValue for hashing std::multiset
-template <typename H, typename Key, typename Compare, typename Allocator>
-typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
-    H hash_state, const std::multiset<Key, Compare, Allocator>& set) {
-  for (const auto& t : set) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), set.size());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Wrapper Types
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::reference_wrapper
-template <typename H, typename T>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, std::reference_wrapper<T> opt) {
-  return H::combine(std::move(hash_state), opt.get());
-}
-
-// AbslHashValue for hashing absl::optional
-template <typename H, typename T>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const absl::optional<T>& opt) {
-  if (opt) hash_state = H::combine(std::move(hash_state), *opt);
-  return H::combine(std::move(hash_state), opt.has_value());
-}
-
-// VariantVisitor
-template <typename H>
-struct VariantVisitor {
-  H&& hash_state;
-  template <typename T>
-  H operator()(const T& t) const {
-    return H::combine(std::move(hash_state), t);
-  }
-};
-
-// AbslHashValue for hashing absl::variant
-template <typename H, typename... T>
-typename std::enable_if<conjunction<is_hashable<T>...>::value, H>::type
-AbslHashValue(H hash_state, const absl::variant<T...>& v) {
-  if (!v.valueless_by_exception()) {
-    hash_state = absl::visit(VariantVisitor<H>{std::move(hash_state)}, v);
-  }
-  return H::combine(std::move(hash_state), v.index());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Other Types
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::bitset is not defined, for the same reason as
-// for vector<bool> (see std::vector above): It does not expose the raw bytes,
-// and a fallback to std::hash<> is most likely faster.
-
-// -----------------------------------------------------------------------------
-
-// hash_range_or_bytes()
-//
-// Mixes all values in the range [data, data+size) into the hash state.
-// This overload accepts only uniquely-represented types, and hashes them by
-// hashing the entire range of bytes.
-template <typename H, typename T>
-typename std::enable_if<is_uniquely_represented<T>::value, H>::type
-hash_range_or_bytes(H hash_state, const T* data, size_t size) {
-  const auto* bytes = reinterpret_cast<const unsigned char*>(data);
-  return H::combine_contiguous(std::move(hash_state), bytes, sizeof(T) * size);
-}
-
-// hash_range_or_bytes()
-template <typename H, typename T>
-typename std::enable_if<!is_uniquely_represented<T>::value, H>::type
-hash_range_or_bytes(H hash_state, const T* data, size_t size) {
-  for (const auto end = data + size; data < end; ++data) {
-    hash_state = H::combine(std::move(hash_state), *data);
-  }
-  return hash_state;
-}
-
-#if defined(ABSL_INTERNAL_LEGACY_HASH_NAMESPACE) && \
-    ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-#define ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_ 1
-#else
-#define ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_ 0
-#endif
-
-// HashSelect
-//
-// Type trait to select the appropriate hash implementation to use.
-// HashSelect::type<T> will give the proper hash implementation, to be invoked
-// as:
-//   HashSelect::type<T>::Invoke(state, value)
-// Also, HashSelect::type<T>::value is a boolean equal to `true` if there is a
-// valid `Invoke` function. Types that are not hashable will have a ::value of
-// `false`.
-struct HashSelect {
- private:
-  struct State : HashStateBase<State> {
-    static State combine_contiguous(State hash_state, const unsigned char*,
-                                    size_t);
-    using State::HashStateBase::combine_contiguous;
-  };
-
-  struct UniquelyRepresentedProbe {
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value)
-        -> absl::enable_if_t<is_uniquely_represented<T>::value, H> {
-      return hash_internal::hash_bytes(std::move(state), value);
-    }
-  };
-
-  struct HashValueProbe {
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value) -> absl::enable_if_t<
-        std::is_same<H,
-                     decltype(AbslHashValue(std::move(state), value))>::value,
-        H> {
-      return AbslHashValue(std::move(state), value);
-    }
-  };
-
-  struct LegacyHashProbe {
-#if ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value) -> absl::enable_if_t<
-        std::is_convertible<
-            decltype(ABSL_INTERNAL_LEGACY_HASH_NAMESPACE::hash<T>()(value)),
-            size_t>::value,
-        H> {
-      return hash_internal::hash_bytes(
-          std::move(state),
-          ABSL_INTERNAL_LEGACY_HASH_NAMESPACE::hash<T>{}(value));
-    }
-#endif  // ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-  };
-
-  struct StdHashProbe {
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value)
-        -> absl::enable_if_t<type_traits_internal::IsHashable<T>::value, H> {
-      return hash_internal::hash_bytes(std::move(state), std::hash<T>{}(value));
-    }
-  };
-
-  template <typename Hash, typename T>
-  struct Probe : Hash {
-   private:
-    template <typename H, typename = decltype(H::Invoke(
-                              std::declval<State>(), std::declval<const T&>()))>
-    static std::true_type Test(int);
-    template <typename U>
-    static std::false_type Test(char);
-
-   public:
-    static constexpr bool value = decltype(Test<Hash>(0))::value;
-  };
-
- public:
-  // Probe each implementation in order.
-  // disjunction provides short circuiting wrt instantiation.
-  template <typename T>
-  using Apply = absl::disjunction<         //
-      Probe<UniquelyRepresentedProbe, T>,  //
-      Probe<HashValueProbe, T>,            //
-      Probe<LegacyHashProbe, T>,           //
-      Probe<StdHashProbe, T>,              //
-      std::false_type>;
-};
-
-template <typename T>
-struct is_hashable
-    : std::integral_constant<bool, HashSelect::template Apply<T>::value> {};
-
-// HashState
-class ABSL_DLL HashState : public HashStateBase<HashState> {
-  // absl::uint128 is not an alias or a thin wrapper around the intrinsic.
-  // We use the intrinsic when available to improve performance.
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  using uint128 = __uint128_t;
-#else   // ABSL_HAVE_INTRINSIC_INT128
-  using uint128 = absl::uint128;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-  static constexpr uint64_t kMul =
-      sizeof(size_t) == 4 ? uint64_t{0xcc9e2d51}
-                          : uint64_t{0x9ddfea08eb382d69};
-
-  template <typename T>
-  using IntegralFastPath =
-      conjunction<std::is_integral<T>, is_uniquely_represented<T>>;
-
- public:
-  // Move only
-  HashState(HashState&&) = default;
-  HashState& operator=(HashState&&) = default;
-
-  // HashState::combine_contiguous()
-  //
-  // Fundamental base case for hash recursion: mixes the given range of bytes
-  // into the hash state.
-  static HashState combine_contiguous(HashState hash_state,
-                                      const unsigned char* first, size_t size) {
-    return HashState(
-        CombineContiguousImpl(hash_state.state_, first, size,
-                              std::integral_constant<int, sizeof(size_t)>{}));
-  }
-  using HashState::HashStateBase::combine_contiguous;
-
-  // HashState::hash()
-  //
-  // For performance reasons in non-opt mode, we specialize this for
-  // integral types.
-  // Otherwise we would be instantiating and calling dozens of functions for
-  // something that is just one multiplication and a couple xor's.
-  // The result should be the same as running the whole algorithm, but faster.
-  template <typename T, absl::enable_if_t<IntegralFastPath<T>::value, int> = 0>
-  static size_t hash(T value) {
-    return static_cast<size_t>(Mix(Seed(), static_cast<uint64_t>(value)));
-  }
-
-  // Overload of HashState::hash()
-  template <typename T, absl::enable_if_t<!IntegralFastPath<T>::value, int> = 0>
-  static size_t hash(const T& value) {
-    return static_cast<size_t>(combine(HashState{}, value).state_);
-  }
-
- private:
-  // Invoked only once for a given argument; that plus the fact that this is
-  // move-only ensures that there is only one non-moved-from object.
-  HashState() : state_(Seed()) {}
-
-  // Workaround for MSVC bug.
-  // We make the type copyable to fix the calling convention, even though we
-  // never actually copy it. Keep it private to not affect the public API of the
-  // type.
-  HashState(const HashState&) = default;
-
-  explicit HashState(uint64_t state) : state_(state) {}
-
-  // Implementation of the base case for combine_contiguous where we actually
-  // mix the bytes into the state.
-  // Dispatch to different implementations of the combine_contiguous depending
-  // on the value of `sizeof(size_t)`.
-  static uint64_t CombineContiguousImpl(uint64_t state,
-                                        const unsigned char* first, size_t len,
-                                        std::integral_constant<int, 4>
-                                        /* sizeof_size_t */);
-  static uint64_t CombineContiguousImpl(uint64_t state,
-                                        const unsigned char* first, size_t len,
-                                        std::integral_constant<int, 8>
-                                        /* sizeof_size_t */);
-
-
-  // Slow dispatch path for calls to CombineContiguousImpl with a size argument
-  // larger than PiecewiseChunkSize().  Has the same effect as calling
-  // CombineContiguousImpl() repeatedly with the chunk stride size.
-  static uint64_t CombineLargeContiguousImpl32(uint64_t state,
-                                               const unsigned char* first,
-                                               size_t len);
-  static uint64_t CombineLargeContiguousImpl64(uint64_t state,
-                                               const unsigned char* first,
-                                               size_t len);
-
-  // Reads 9 to 16 bytes from p.
-  // The first 8 bytes are in .first, the rest (zero padded) bytes are in
-  // .second.
-  static std::pair<uint64_t, uint64_t> Read9To16(const unsigned char* p,
-                                                 size_t len) {
-    uint64_t high = little_endian::Load64(p + len - 8);
-    return {little_endian::Load64(p), high >> (128 - len * 8)};
-  }
-
-  // Reads 4 to 8 bytes from p. Zero pads to fill uint64_t.
-  static uint64_t Read4To8(const unsigned char* p, size_t len) {
-    return (static_cast<uint64_t>(little_endian::Load32(p + len - 4))
-            << (len - 4) * 8) |
-           little_endian::Load32(p);
-  }
-
-  // Reads 1 to 3 bytes from p. Zero pads to fill uint32_t.
-  static uint32_t Read1To3(const unsigned char* p, size_t len) {
-    return static_cast<uint32_t>((p[0]) |                         //
-                                 (p[len / 2] << (len / 2 * 8)) |  //
-                                 (p[len - 1] << ((len - 1) * 8)));
-  }
-
-  ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Mix(uint64_t state, uint64_t v) {
-    using MultType =
-        absl::conditional_t<sizeof(size_t) == 4, uint64_t, uint128>;
-    // We do the addition in 64-bit space to make sure the 128-bit
-    // multiplication is fast. If we were to do it as MultType the compiler has
-    // to assume that the high word is non-zero and needs to perform 2
-    // multiplications instead of one.
-    MultType m = state + v;
-    m *= kMul;
-    return static_cast<uint64_t>(m ^ (m >> (sizeof(m) * 8 / 2)));
-  }
-
-  // An extern to avoid bloat on a direct call to Wyhash() with fixed values for
-  // both the seed and salt parameters.
-  static uint64_t WyhashImpl(const unsigned char* data, size_t len);
-
-  ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Hash64(const unsigned char* data,
-                                                      size_t len) {
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-    return WyhashImpl(data, len);
-#else
-    return absl::hash_internal::CityHash64(reinterpret_cast<const char*>(data), len);
-#endif
-  }
-
-  // Seed()
-  //
-  // A non-deterministic seed.
-  //
-  // The current purpose of this seed is to generate non-deterministic results
-  // and prevent having users depend on the particular hash values.
-  // It is not meant as a security feature right now, but it leaves the door
-  // open to upgrade it to a true per-process random seed. A true random seed
-  // costs more and we don't need to pay for that right now.
-  //
-  // On platforms with ASLR, we take advantage of it to make a per-process
-  // random value.
-  // See https://en.wikipedia.org/wiki/Address_space_layout_randomization
-  //
-  // On other platforms this is still going to be non-deterministic but most
-  // probably per-build and not per-process.
-  ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Seed() {
-#if (!defined(__clang__) || __clang_major__ > 11) && \
-    !defined(__apple_build_version__)
-    return static_cast<uint64_t>(reinterpret_cast<uintptr_t>(&kSeed));
-#else
-    // Workaround the absence of
-    // https://github.com/llvm/llvm-project/commit/bc15bf66dcca76cc06fe71fca35b74dc4d521021.
-    return static_cast<uint64_t>(reinterpret_cast<uintptr_t>(kSeed));
-#endif
-  }
-  static const void* const kSeed;
-
-  uint64_t state_;
-};
-
-// HashState::CombineContiguousImpl()
-inline uint64_t HashState::CombineContiguousImpl(
-    uint64_t state, const unsigned char* first, size_t len,
-    std::integral_constant<int, 4> /* sizeof_size_t */) {
-  // For large values we use CityHash, for small ones we just use a
-  // multiplicative hash.
-  uint64_t v;
-  if (len > 8) {
-    if (ABSL_PREDICT_FALSE(len > PiecewiseChunkSize())) {
-      return CombineLargeContiguousImpl32(state, first, len);
-    }
-    v = absl::hash_internal::CityHash32(reinterpret_cast<const char*>(first), len);
-  } else if (len >= 4) {
-    v = Read4To8(first, len);
-  } else if (len > 0) {
-    v = Read1To3(first, len);
-  } else {
-    // Empty ranges have no effect.
-    return state;
-  }
-  return Mix(state, v);
-}
-
-// Overload of HashState::CombineContiguousImpl()
-inline uint64_t HashState::CombineContiguousImpl(
-    uint64_t state, const unsigned char* first, size_t len,
-    std::integral_constant<int, 8> /* sizeof_size_t */) {
-  // For large values we use Wyhash or CityHash depending on the platform, for
-  // small ones we just use a multiplicative hash.
-  uint64_t v;
-  if (len > 16) {
-    if (ABSL_PREDICT_FALSE(len > PiecewiseChunkSize())) {
-      return CombineLargeContiguousImpl64(state, first, len);
-    }
-    v = Hash64(first, len);
-  } else if (len > 8) {
-    auto p = Read9To16(first, len);
-    state = Mix(state, p.first);
-    v = p.second;
-  } else if (len >= 4) {
-    v = Read4To8(first, len);
-  } else if (len > 0) {
-    v = Read1To3(first, len);
-  } else {
-    // Empty ranges have no effect.
-    return state;
-  }
-  return Mix(state, v);
-}
-
-struct AggregateBarrier {};
-
-// HashImpl
-
-// Add a private base class to make sure this type is not an aggregate.
-// Aggregates can be aggregate initialized even if the default constructor is
-// deleted.
-struct PoisonedHash : private AggregateBarrier {
-  PoisonedHash() = delete;
-  PoisonedHash(const PoisonedHash&) = delete;
-  PoisonedHash& operator=(const PoisonedHash&) = delete;
-};
-
-template <typename T>
-struct HashImpl {
-  size_t operator()(const T& value) const { return HashState::hash(value); }
-};
-
-template <typename T>
-struct Hash
-    : absl::conditional_t<is_hashable<T>::value, HashImpl<T>, PoisonedHash> {};
-
-template <typename H>
-template <typename T, typename... Ts>
-H HashStateBase<H>::combine(H state, const T& value, const Ts&... values) {
-  return H::combine(hash_internal::HashSelect::template Apply<T>::Invoke(
-                        std::move(state), value),
-                    values...);
-}
-
-// HashStateBase::combine_contiguous()
-template <typename H>
-template <typename T>
-H HashStateBase<H>::combine_contiguous(H state, const T* data, size_t size) {
-  return hash_internal::hash_range_or_bytes(std::move(state), data, size);
-}
-
-// HashStateBase::PiecewiseCombiner::add_buffer()
-template <typename H>
-H PiecewiseCombiner::add_buffer(H state, const unsigned char* data,
-                                size_t size) {
-  if (position_ + size < PiecewiseChunkSize()) {
-    // This partial chunk does not fill our existing buffer
-    memcpy(buf_ + position_, data, size);
-    position_ += size;
-    return state;
-  }
-
-  // If the buffer is partially filled we need to complete the buffer
-  // and hash it.
-  if (position_ != 0) {
-    const size_t bytes_needed = PiecewiseChunkSize() - position_;
-    memcpy(buf_ + position_, data, bytes_needed);
-    state = H::combine_contiguous(std::move(state), buf_, PiecewiseChunkSize());
-    data += bytes_needed;
-    size -= bytes_needed;
-  }
-
-  // Hash whatever chunks we can without copying
-  while (size >= PiecewiseChunkSize()) {
-    state = H::combine_contiguous(std::move(state), data, PiecewiseChunkSize());
-    data += PiecewiseChunkSize();
-    size -= PiecewiseChunkSize();
-  }
-  // Fill the buffer with the remainder
-  memcpy(buf_, data, size);
-  position_ = size;
-  return state;
-}
-
-// HashStateBase::PiecewiseCombiner::finalize()
-template <typename H>
-H PiecewiseCombiner::finalize(H state) {
-  // Hash the remainder left in the buffer, which may be empty
-  return H::combine_contiguous(std::move(state), buf_, position_);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_HASH_H_
diff --git a/third_party/abseil/absl/hash/internal/print_hash_of.cc b/third_party/abseil/absl/hash/internal/print_hash_of.cc
deleted file mode 100644
index c392125..0000000
--- a/third_party/abseil/absl/hash/internal/print_hash_of.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdlib>
-
-#include "absl/hash/hash.h"
-
-// Prints the hash of argv[1].
-int main(int argc, char** argv) {
-  if (argc < 2) return 1;
-  printf("%zu\n", absl::Hash<int>{}(std::atoi(argv[1])));  // NOLINT
-}
diff --git a/third_party/abseil/absl/hash/internal/spy_hash_state.h b/third_party/abseil/absl/hash/internal/spy_hash_state.h
deleted file mode 100644
index c083120..0000000
--- a/third_party/abseil/absl/hash/internal/spy_hash_state.h
+++ /dev/null
@@ -1,231 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
-#define ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
-
-#include <ostream>
-#include <string>
-#include <vector>
-
-#include "absl/hash/hash.h"
-#include "absl/strings/match.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_join.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// SpyHashState is an implementation of the HashState API that simply
-// accumulates all input bytes in an internal buffer. This makes it useful
-// for testing AbslHashValue overloads (so long as they are templated on the
-// HashState parameter), since it can report the exact hash representation
-// that the AbslHashValue overload produces.
-//
-// Sample usage:
-// EXPECT_EQ(SpyHashState::combine(SpyHashState(), foo),
-//           SpyHashState::combine(SpyHashState(), bar));
-template <typename T>
-class SpyHashStateImpl : public HashStateBase<SpyHashStateImpl<T>> {
- public:
-  SpyHashStateImpl() : error_(std::make_shared<absl::optional<std::string>>()) {
-    static_assert(std::is_void<T>::value, "");
-  }
-
-  // Move-only
-  SpyHashStateImpl(const SpyHashStateImpl&) = delete;
-  SpyHashStateImpl& operator=(const SpyHashStateImpl&) = delete;
-
-  SpyHashStateImpl(SpyHashStateImpl&& other) noexcept {
-    *this = std::move(other);
-  }
-
-  SpyHashStateImpl& operator=(SpyHashStateImpl&& other) noexcept {
-    hash_representation_ = std::move(other.hash_representation_);
-    error_ = other.error_;
-    moved_from_ = other.moved_from_;
-    other.moved_from_ = true;
-    return *this;
-  }
-
-  template <typename U>
-  SpyHashStateImpl(SpyHashStateImpl<U>&& other) {  // NOLINT
-    hash_representation_ = std::move(other.hash_representation_);
-    error_ = other.error_;
-    moved_from_ = other.moved_from_;
-    other.moved_from_ = true;
-  }
-
-  template <typename A, typename... Args>
-  static SpyHashStateImpl combine(SpyHashStateImpl s, const A& a,
-                                  const Args&... args) {
-    // Pass an instance of SpyHashStateImpl<A> when trying to combine `A`. This
-    // allows us to test that the user only uses this instance for combine calls
-    // and does not call AbslHashValue directly.
-    // See AbslHashValue implementation at the bottom.
-    s = SpyHashStateImpl<A>::HashStateBase::combine(std::move(s), a);
-    return SpyHashStateImpl::combine(std::move(s), args...);
-  }
-  static SpyHashStateImpl combine(SpyHashStateImpl s) {
-    if (direct_absl_hash_value_error_) {
-      *s.error_ = "AbslHashValue should not be invoked directly.";
-    } else if (s.moved_from_) {
-      *s.error_ = "Used moved-from instance of the hash state object.";
-    }
-    return s;
-  }
-
-  static void SetDirectAbslHashValueError() {
-    direct_absl_hash_value_error_ = true;
-  }
-
-  // Two SpyHashStateImpl objects are equal if they hold equal hash
-  // representations.
-  friend bool operator==(const SpyHashStateImpl& lhs,
-                         const SpyHashStateImpl& rhs) {
-    return lhs.hash_representation_ == rhs.hash_representation_;
-  }
-
-  friend bool operator!=(const SpyHashStateImpl& lhs,
-                         const SpyHashStateImpl& rhs) {
-    return !(lhs == rhs);
-  }
-
-  enum class CompareResult {
-    kEqual,
-    kASuffixB,
-    kBSuffixA,
-    kUnequal,
-  };
-
-  static CompareResult Compare(const SpyHashStateImpl& a,
-                               const SpyHashStateImpl& b) {
-    const std::string a_flat = absl::StrJoin(a.hash_representation_, "");
-    const std::string b_flat = absl::StrJoin(b.hash_representation_, "");
-    if (a_flat == b_flat) return CompareResult::kEqual;
-    if (absl::EndsWith(a_flat, b_flat)) return CompareResult::kBSuffixA;
-    if (absl::EndsWith(b_flat, a_flat)) return CompareResult::kASuffixB;
-    return CompareResult::kUnequal;
-  }
-
-  // operator<< prints the hash representation as a hex and ASCII dump, to
-  // facilitate debugging.
-  friend std::ostream& operator<<(std::ostream& out,
-                                  const SpyHashStateImpl& hash_state) {
-    out << "[\n";
-    for (auto& s : hash_state.hash_representation_) {
-      size_t offset = 0;
-      for (char c : s) {
-        if (offset % 16 == 0) {
-          out << absl::StreamFormat("\n0x%04x: ", offset);
-        }
-        if (offset % 2 == 0) {
-          out << " ";
-        }
-        out << absl::StreamFormat("%02x", c);
-        ++offset;
-      }
-      out << "\n";
-    }
-    return out << "]";
-  }
-
-  // The base case of the combine recursion, which writes raw bytes into the
-  // internal buffer.
-  static SpyHashStateImpl combine_contiguous(SpyHashStateImpl hash_state,
-                                             const unsigned char* begin,
-                                             size_t size) {
-    const size_t large_chunk_stride = PiecewiseChunkSize();
-    if (size > large_chunk_stride) {
-      // Combining a large contiguous buffer must have the same effect as
-      // doing it piecewise by the stride length, followed by the (possibly
-      // empty) remainder.
-      while (size >= large_chunk_stride) {
-        hash_state = SpyHashStateImpl::combine_contiguous(
-            std::move(hash_state), begin, large_chunk_stride);
-        begin += large_chunk_stride;
-        size -= large_chunk_stride;
-      }
-    }
-
-    hash_state.hash_representation_.emplace_back(
-        reinterpret_cast<const char*>(begin), size);
-    return hash_state;
-  }
-
-  using SpyHashStateImpl::HashStateBase::combine_contiguous;
-
-  absl::optional<std::string> error() const {
-    if (moved_from_) {
-      return "Returned a moved-from instance of the hash state object.";
-    }
-    return *error_;
-  }
-
- private:
-  template <typename U>
-  friend class SpyHashStateImpl;
-
-  // This is true if SpyHashStateImpl<T> has been passed to a call of
-  // AbslHashValue with the wrong type. This detects that the user called
-  // AbslHashValue directly (because the hash state type does not match).
-  static bool direct_absl_hash_value_error_;
-
-  std::vector<std::string> hash_representation_;
-  // This is a shared_ptr because we want all instances of the particular
-  // SpyHashState run to share the field. This way we can set the error for
-  // use-after-move and all the copies will see it.
-  std::shared_ptr<absl::optional<std::string>> error_;
-  bool moved_from_ = false;
-};
-
-template <typename T>
-bool SpyHashStateImpl<T>::direct_absl_hash_value_error_;
-
-template <bool& B>
-struct OdrUse {
-  constexpr OdrUse() {}
-  bool& b = B;
-};
-
-template <void (*)()>
-struct RunOnStartup {
-  static bool run;
-  static constexpr OdrUse<run> kOdrUse{};
-};
-
-template <void (*f)()>
-bool RunOnStartup<f>::run = (f(), true);
-
-template <
-    typename T, typename U,
-    // Only trigger for when (T != U),
-    typename = absl::enable_if_t<!std::is_same<T, U>::value>,
-    // This statement works in two ways:
-    //  - First, it instantiates RunOnStartup and forces the initialization of
-    //    `run`, which set the global variable.
-    //  - Second, it triggers a SFINAE error disabling the overload to prevent
-    //    compile time errors. If we didn't disable the overload we would get
-    //    ambiguous overload errors, which we don't want.
-    int = RunOnStartup<SpyHashStateImpl<T>::SetDirectAbslHashValueError>::run>
-void AbslHashValue(SpyHashStateImpl<T>, const U&);
-
-using SpyHashState = SpyHashStateImpl<void>;
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
diff --git a/third_party/abseil/absl/hash/internal/wyhash.cc b/third_party/abseil/absl/hash/internal/wyhash.cc
deleted file mode 100644
index 642bde4..0000000
--- a/third_party/abseil/absl/hash/internal/wyhash.cc
+++ /dev/null
@@ -1,111 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/hash/internal/wyhash.h"
-
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/numeric/int128.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-static uint64_t WyhashMix(uint64_t v0, uint64_t v1) {
-  absl::uint128 p = v0;
-  p *= v1;
-  return absl::Uint128Low64(p) ^ absl::Uint128High64(p);
-}
-
-uint64_t Wyhash(const void* data, size_t len, uint64_t seed,
-                const uint64_t salt[]) {
-  const uint8_t* ptr = static_cast<const uint8_t*>(data);
-  uint64_t starting_length = static_cast<uint64_t>(len);
-  uint64_t current_state = seed ^ salt[0];
-
-  if (len > 64) {
-    // If we have more than 64 bytes, we're going to handle chunks of 64
-    // bytes at a time. We're going to build up two separate hash states
-    // which we will then hash together.
-    uint64_t duplicated_state = current_state;
-
-    do {
-      uint64_t a = absl::base_internal::UnalignedLoad64(ptr);
-      uint64_t b = absl::base_internal::UnalignedLoad64(ptr + 8);
-      uint64_t c = absl::base_internal::UnalignedLoad64(ptr + 16);
-      uint64_t d = absl::base_internal::UnalignedLoad64(ptr + 24);
-      uint64_t e = absl::base_internal::UnalignedLoad64(ptr + 32);
-      uint64_t f = absl::base_internal::UnalignedLoad64(ptr + 40);
-      uint64_t g = absl::base_internal::UnalignedLoad64(ptr + 48);
-      uint64_t h = absl::base_internal::UnalignedLoad64(ptr + 56);
-
-      uint64_t cs0 = WyhashMix(a ^ salt[1], b ^ current_state);
-      uint64_t cs1 = WyhashMix(c ^ salt[2], d ^ current_state);
-      current_state = (cs0 ^ cs1);
-
-      uint64_t ds0 = WyhashMix(e ^ salt[3], f ^ duplicated_state);
-      uint64_t ds1 = WyhashMix(g ^ salt[4], h ^ duplicated_state);
-      duplicated_state = (ds0 ^ ds1);
-
-      ptr += 64;
-      len -= 64;
-    } while (len > 64);
-
-    current_state = current_state ^ duplicated_state;
-  }
-
-  // We now have a data `ptr` with at most 64 bytes and the current state
-  // of the hashing state machine stored in current_state.
-  while (len > 16) {
-    uint64_t a = absl::base_internal::UnalignedLoad64(ptr);
-    uint64_t b = absl::base_internal::UnalignedLoad64(ptr + 8);
-
-    current_state = WyhashMix(a ^ salt[1], b ^ current_state);
-
-    ptr += 16;
-    len -= 16;
-  }
-
-  // We now have a data `ptr` with at most 16 bytes.
-  uint64_t a = 0;
-  uint64_t b = 0;
-  if (len > 8) {
-    // When we have at least 9 and at most 16 bytes, set A to the first 64
-    // bits of the input and B to the last 64 bits of the input. Yes, they will
-    // overlap in the middle if we are working with less than the full 16
-    // bytes.
-    a = absl::base_internal::UnalignedLoad64(ptr);
-    b = absl::base_internal::UnalignedLoad64(ptr + len - 8);
-  } else if (len > 3) {
-    // If we have at least 4 and at most 8 bytes, set A to the first 32
-    // bits and B to the last 32 bits.
-    a = absl::base_internal::UnalignedLoad32(ptr);
-    b = absl::base_internal::UnalignedLoad32(ptr + len - 4);
-  } else if (len > 0) {
-    // If we have at least 1 and at most 3 bytes, read all of the provided
-    // bits into A, with some adjustments.
-    a = ((ptr[0] << 16) | (ptr[len >> 1] << 8) | ptr[len - 1]);
-    b = 0;
-  } else {
-    a = 0;
-    b = 0;
-  }
-
-  uint64_t w = WyhashMix(a ^ salt[1], b ^ current_state);
-  uint64_t z = salt[1] ^ starting_length;
-  return WyhashMix(w, z);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/hash/internal/wyhash.h b/third_party/abseil/absl/hash/internal/wyhash.h
deleted file mode 100644
index 4aff4e9..0000000
--- a/third_party/abseil/absl/hash/internal/wyhash.h
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file provides the Google-internal implementation of the Wyhash
-// algorithm.
-//
-// Wyhash is a fast hash function for hash tables, the fastest we've currently
-// (late 2020) found that passes the SMHasher tests. The algorithm relies on
-// intrinsic 128-bit multiplication for speed. This is not meant to be secure -
-// just fast.
-
-#ifndef ABSL_HASH_INTERNAL_WYHASH_H_
-#define ABSL_HASH_INTERNAL_WYHASH_H_
-
-#include <stdint.h>
-#include <stdlib.h>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// Hash function for a byte array. A 64-bit seed and a set of five 64-bit
-// integers are hashed into the result.
-//
-// To allow all hashable types (including string_view and Span) to depend on
-// this algoritm, we keep the API low-level, with as few dependencies as
-// possible.
-uint64_t Wyhash(const void* data, size_t len, uint64_t seed,
-                const uint64_t salt[5]);
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_WYHASH_H_
diff --git a/third_party/abseil/absl/hash/internal/wyhash_test.cc b/third_party/abseil/absl/hash/internal/wyhash_test.cc
deleted file mode 100644
index 30dc9e3..0000000
--- a/third_party/abseil/absl/hash/internal/wyhash_test.cc
+++ /dev/null
@@ -1,486 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in cokSaltliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or ikSaltlied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/hash/internal/wyhash.h"
-
-#include "absl/strings/escaping.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-static const uint64_t kCurrentSeed = 0;
-static const uint64_t kSalt[5] = {0xa0761d6478bd642f, 0xe7037ed1a0b428dbl,
-                                  0x8ebc6af09c88c6e3, 0x589965cc75374cc3l,
-                                  0x1d8e4e27c47d124f};
-
-// Note: We don't account for endianness, so the values here are only correct if
-// you're also running on a little endian platform.
-
-TEST(WyhashTest, EmptyString) {
-  const std::string s = "";
-  EXPECT_EQ(
-      absl::hash_internal::Wyhash(s.c_str(), s.length(), kCurrentSeed, kSalt),
-      4808886099364463827);
-}
-
-TEST(WyhashTest, Spaces) {
-  const std::string s = "   ";
-  EXPECT_EQ(
-      absl::hash_internal::Wyhash(s.c_str(), s.length(), kCurrentSeed, kSalt),
-      1686201463024549249);
-}
-
-TEST(WyhashTest, RepeatingString) {
-  const std::string s = "aaaa";
-  EXPECT_EQ(
-      absl::hash_internal::Wyhash(s.c_str(), s.length(), kCurrentSeed, kSalt),
-      6646112255271966632);
-}
-
-TEST(WyhashTest, HexString) {
-  const std::string small = "\x01\x02\x03";
-  const std::string med = "\x01\x02\x03\x04";
-
-  EXPECT_EQ(absl::hash_internal::Wyhash(small.c_str(), small.length(),
-                                        kCurrentSeed, kSalt),
-            11989428023081740911ULL);
-  EXPECT_EQ(absl::hash_internal::Wyhash(med.c_str(), med.length(), kCurrentSeed,
-                                        kSalt),
-            9765997711188871556ULL);
-}
-
-TEST(WyhashTest, Words) {
-  const std::string s = "third_party|wyhash|64";
-  EXPECT_EQ(
-      absl::hash_internal::Wyhash(s.c_str(), s.length(), kCurrentSeed, kSalt),
-      3702018632387611330);
-}
-
-TEST(WyhashTest, LongString) {
-  const std::string s =
-      "AbCdEfGhIjKlMnOpQrStUvWxYz0123456789AbCdEfGhIjKlMnOpQrStUvWxYz"
-      "0123456789AbCdEfGhIjKlMnOpQrStUvWxYz0123456789AbCdEfGhIjKlMnOp"
-      "QrStUvWxYz0123456789AbCdEfGhIjKlMnOpQrStUvWxYz0123456789AbCdEf"
-      "GhIjKlMnOpQrStUvWxYz0123456789AbCdEfGhIjKlMnOpQrStUvWxYz012345"
-      "6789AbCdEfGhIjKlMnOpQrStUvWxYz0123456789";
-
-  EXPECT_EQ(
-      absl::hash_internal::Wyhash(s.c_str(), s.length(), kCurrentSeed, kSalt),
-      9245411362605796064ULL);
-}
-
-TEST(WyhashTest, BigReference) {
-  struct ExpectedResult {
-    absl::string_view base64_data;
-    uint64_t seed;
-    uint64_t hash;
-  } expected_results[] = {
-      {"", uint64_t{0xec42b7ab404b8acb}, uint64_t{0xe5a40d39ab796423}},
-      {"Zw==", uint64_t{0xeeee074043a3ee0f}, uint64_t{0xa6564b468248c683}},
-      {"xmk=", uint64_t{0x857902089c393de}, uint64_t{0xef192f401b116e1c}},
-      {"c1H/", uint64_t{0x993df040024ca3af}, uint64_t{0xbe8dc0c54617639d}},
-      {"SuwpzQ==", uint64_t{0xc4e4c2acea740e96}, uint64_t{0x93d7f665b5521c8e}},
-      {"uqvy++M=", uint64_t{0x6a214b3db872d0cf}, uint64_t{0x646d70bb42445f28}},
-      {"RnzCVPgb", uint64_t{0x44343db6a89dba4d}, uint64_t{0x96a7b1e3cc9bd426}},
-      {"6OeNdlouYw==", uint64_t{0x77b5d6d1ae1dd483},
-       uint64_t{0x76020289ab0790c4}},
-      {"M5/JmmYyDbc=", uint64_t{0x89ab8ecb44d221f1},
-       uint64_t{0x39f842e4133b9b44}},
-      {"MVijWiVdBRdY", uint64_t{0x60244b17577ca81b},
-       uint64_t{0x2b8d7047be4bcaab}},
-      {"6V7Uq7LNxpu0VA==", uint64_t{0x59a08dcee0717067},
-       uint64_t{0x99628abef6716a97}},
-      {"EQ6CdEEhPdyHcOk=", uint64_t{0xf5f20db3ade57396},
-       uint64_t{0x4432e02ba42b2740}},
-      {"PqFB4fxnPgF+l+rc", uint64_t{0xbf8dee0751ad3efb},
-       uint64_t{0x74d810efcad7918a}},
-      {"a5aPOFwq7LA7+zKvPA==", uint64_t{0x6b7a06b268d63e30},
-       uint64_t{0x88c84e986002507f}},
-      {"VOwY21wCGv5D+/qqOvs=", uint64_t{0xb8c37f0ae0f54c82},
-       uint64_t{0x4f99acf193cf39b9}},
-      {"KdHmBTx8lHXYvmGJ+Vy7", uint64_t{0x9fcbed0c38e50eef},
-       uint64_t{0xd90e7a3655891e37}},
-      {"qJkPlbHr8bMF7/cA6aE65Q==", uint64_t{0x2af4bade1d8e3a1d},
-       uint64_t{0x3bb378b1d4df8fcf}},
-      {"ygvL0EhHZL0fIx6oHHtkxRQ=", uint64_t{0x714e3aa912da2f2c},
-       uint64_t{0xf78e94045c052d47}},
-      {"c1rFXkt5YztwZCQRngncqtSs", uint64_t{0xf5ee75e3cbb82c1c},
-       uint64_t{0x26da0b2130da6b40}},
-      {"8hsQrzszzeNQSEcVXLtvIhm6mw==", uint64_t{0x620e7007321b93b9},
-       uint64_t{0x30b4d426af8c6986}},
-      {"ffUL4RocfyP4KfikGxO1yk7omDI=", uint64_t{0xc08528cac2e551fc},
-       uint64_t{0x5413b4aaf3baaeae}},
-      {"OOB5TT00vF9Od/rLbAWshiErqhpV", uint64_t{0x6a1debf9cc3ad39},
-       uint64_t{0x756ab265370a1597}},
-      {"or5wtXM7BFzTNpSzr+Lw5J5PMhVJ/Q==", uint64_t{0x7e0a3c88111fc226},
-       uint64_t{0xdaf5f4b7d09814fb}},
-      {"gk6pCHDUsoopVEiaCrzVDhioRKxb844=", uint64_t{0x1301fef15df39edb},
-       uint64_t{0x8f874ae37742b75e}},
-      {"TNctmwlC5QbEM6/No4R/La3UdkfeMhzs", uint64_t{0x64e181f3d5817ab},
-       uint64_t{0x8fecd03956121ce8}},
-      {"SsQw9iAjhWz7sgcE9OwLuSC6hsM+BfHs2Q==", uint64_t{0xafafc44961078ecb},
-       uint64_t{0x229c292ea7a08285}},
-      {"ZzO3mVCj4xTT2TT3XqDyEKj2BZQBvrS8RHg=", uint64_t{0x4f7bb45549250094},
-       uint64_t{0xbb4bf0692d14bae}},
-      {"+klp5iPQGtppan5MflEls0iEUzqU+zGZkDJX", uint64_t{0xa30061abaa2818c},
-       uint64_t{0x207b24ca3bdac1db}},
-      {"RO6bvOnlJc8I9eniXlNgqtKy0IX6VNg16NRmgg==", uint64_t{0xd902ee3e44a5705f},
-       uint64_t{0x64f6cd6745d3825b}},
-      {"ZJjZqId1ZXBaij9igClE3nyliU5XWdNRrayGlYA=", uint64_t{0x316d36da516f583},
-       uint64_t{0xa2b2e1656b58df1e}},
-      {"7BfkhfGMDGbxfMB8uyL85GbaYQtjr2K8g7RpLzr/", uint64_t{0x402d83f9f834f616},
-       uint64_t{0xd01d30d9ee7a148}},
-      {"rycWk6wHH7htETQtje9PidS2YzXBx+Qkg2fY7ZYS7A==",
-       uint64_t{0x9c604164c016b72c}, uint64_t{0x1cb4cd00ab804e3b}},
-      {"RTkC2OUK+J13CdGllsH0H5WqgspsSa6QzRZouqx6pvI=",
-       uint64_t{0x3f4507e01f9e73ba}, uint64_t{0x4697f2637fd90999}},
-      {"tKjKmbLCNyrLCM9hycOAXm4DKNpM12oZ7dLTmUx5iwAi",
-       uint64_t{0xc3fe0d5be8d2c7c7}, uint64_t{0x8383a756b5688c07}},
-      {"VprUGNH+5NnNRaORxgH/ySrZFQFDL+4VAodhfBNinmn8cg==",
-       uint64_t{0x531858a40bfa7ea1}, uint64_t{0x695c29cb3696a975}},
-      {"gc1xZaY+q0nPcUvOOnWnT3bqfmT/geth/f7Dm2e/DemMfk4=",
-       uint64_t{0x86689478a7a7e8fa}, uint64_t{0xda2e5a5a5e971521}},
-      {"Mr35fIxqx1ukPAL0su1yFuzzAU3wABCLZ8+ZUFsXn47UmAph",
-       uint64_t{0x4ec948b8e7f27288}, uint64_t{0x7935d4befa056b2b}},
-      {"A9G8pw2+m7+rDtWYAdbl8tb2fT7FFo4hLi2vAsa5Y8mKH3CX3g==",
-       uint64_t{0xce46c7213c10032}, uint64_t{0x38dd541ca95420fe}},
-      {"DFaJGishGwEHDdj9ixbCoaTjz9KS0phLNWHVVdFsM93CvPft3hM=",
-       uint64_t{0xf63e96ee6f32a8b6}, uint64_t{0xcc06c7a4963f967f}},
-      {"7+Ugx+Kr3aRNgYgcUxru62YkTDt5Hqis+2po81hGBkcrJg4N0uuy",
-       uint64_t{0x1cfe85e65fc5225}, uint64_t{0xbf0f6f66e232fb20}},
-      {"H2w6O8BUKqu6Tvj2xxaecxEI2wRgIgqnTTG1WwOgDSINR13Nm4d4Vg==",
-       uint64_t{0x45c474f1cee1d2e8}, uint64_t{0xf7efb32d373fe71a}},
-      {"1XBMnIbqD5jy65xTDaf6WtiwtdtQwv1dCVoqpeKj+7cTR1SaMWMyI04=",
-       uint64_t{0x6e024e14015f329c}, uint64_t{0xe2e64634b1c12660}},
-      {"znZbdXG2TSFrKHEuJc83gPncYpzXGbAebUpP0XxzH0rpe8BaMQ17nDbt",
-       uint64_t{0x760c40502103ae1c}, uint64_t{0x285b8fd1638e306d}},
-      {"ylu8Atu13j1StlcC1MRMJJXIl7USgDDS22HgVv0WQ8hx/8pNtaiKB17hCQ==",
-       uint64_t{0x17fd05c3c560c320}, uint64_t{0x658e8a4e3b714d6c}},
-      {"M6ZVVzsd7vAvbiACSYHioH/440dp4xG2mLlBnxgiqEvI/aIEGpD0Sf4VS0g=",
-       uint64_t{0x8b34200a6f8e90d9}, uint64_t{0xf391fb968e0eb398}},
-      {"li3oFSXLXI+ubUVGJ4blP6mNinGKLHWkvGruun85AhVn6iuMtocbZPVhqxzn",
-       uint64_t{0x6be89e50818bdf69}, uint64_t{0x744a9ea0cc144bf2}},
-      {"kFuQHuUCqBF3Tc3hO4dgdIp223ShaCoog48d5Do5zMqUXOh5XpGK1t5XtxnfGA==",
-       uint64_t{0xfb389773315b47d8}, uint64_t{0x12636f2be11012f1}},
-      {"jWmOad0v0QhXVJd1OdGuBZtDYYS8wBVHlvOeTQx9ZZnm8wLEItPMeihj72E0nWY=",
-       uint64_t{0x4f2512a23f61efee}, uint64_t{0x29c57de825948f80}},
-      {"z+DHU52HaOQdW4JrZwDQAebEA6rm13Zg/9lPYA3txt3NjTBqFZlOMvTRnVzRbl23",
-       uint64_t{0x59ccd92fc16c6fda}, uint64_t{0x58c6f99ab0d1c021}},
-      {"MmBiGDfYeTayyJa/tVycg+rN7f9mPDFaDc+23j0TlW9094er0ADigsl4QX7V3gG/qw==",
-       uint64_t{0x25c5a7f5bd330919}, uint64_t{0x13e7b5a7b82fe3bb}},
-      {"774RK+9rOL4iFvs1q2qpo/JVc/I39buvNjqEFDtDvyoB0FXxPI2vXqOrk08VPfIHkmU=",
-       uint64_t{0x51df4174d34c97d7}, uint64_t{0x10fbc87901e02b63}},
-      {"+slatXiQ7/2lK0BkVUI1qzNxOOLP3I1iK6OfHaoxgqT63FpzbElwEXSwdsryq3UlHK0I",
-       uint64_t{0x80ce6d76f89cb57}, uint64_t{0xa24c9184901b748b}},
-      {"64mVTbQ47dHjHlOHGS/hjJwr/"
-       "K2frCNpn87exOqMzNUVYiPKmhCbfS7vBUce5tO6Ec9osQ==",
-       uint64_t{0x20961c911965f684}, uint64_t{0xcac4fd4c5080e581}},
-      {"fIsaG1r530SFrBqaDj1kqE0AJnvvK8MNEZbII2Yw1OK77v0V59xabIh0B5axaz/"
-       "+a2V5WpA=",
-       uint64_t{0x4e5b926ec83868e7}, uint64_t{0xc38bdb7483ba68e1}},
-      {"PGih0zDEOWCYGxuHGDFu9Ivbff/"
-       "iE7BNUq65tycTR2R76TerrXALRosnzaNYO5fjFhTi+CiS",
-       uint64_t{0x3927b30b922eecef}, uint64_t{0xdb2a8069b2ceaffa}},
-      {"RnpA/"
-       "zJnEnnLjmICORByRVb9bCOgxF44p3VMiW10G7PvW7IhwsWajlP9kIwNA9FjAD2GoQHk2Q="
-       "=",
-       uint64_t{0xbd0291284a49b61c}, uint64_t{0xdf9fe91d0d1c7887}},
-      {"qFklMceaTHqJpy2qavJE+EVBiNFOi6OxjOA3LeIcBop1K7w8xQi3TrDk+"
-       "BrWPRIbfprszSaPfrI=",
-       uint64_t{0x73a77c575bcc956}, uint64_t{0xe83f49e96e2e6a08}},
-      {"cLbfUtLl3EcQmITWoTskUR8da/VafRDYF/ylPYwk7/"
-       "zazk6ssyrzxMN3mmSyvrXR2yDGNZ3WDrTT",
-       uint64_t{0x766a0e2ade6d09a6}, uint64_t{0xc69e61b62ca2b62}},
-      {"s/"
-       "Jf1+"
-       "FbsbCpXWPTUSeWyMH6e4CvTFvPE5Fs6Z8hvFITGyr0dtukHzkI84oviVLxhM1xMxrMAy1db"
-       "w==",
-       uint64_t{0x2599f4f905115869}, uint64_t{0xb4a4f3f85f8298fe}},
-      {"FvyQ00+j7nmYZVQ8hI1Edxd0AWplhTfWuFGiu34AK5X8u2hLX1bE97sZM0CmeLe+"
-       "7LgoUT1fJ/axybE=",
-       uint64_t{0xd8256e5444d21e53}, uint64_t{0x167a1b39e1e95f41}},
-      {"L8ncxMaYLBH3g9buPu8hfpWZNlOF7nvWLNv9IozH07uQsIBWSKxoPy8+"
-       "LW4tTuzC6CIWbRGRRD1sQV/4",
-       uint64_t{0xf664a91333fb8dfd}, uint64_t{0xf8a2a5649855ee41}},
-      {"CDK0meI07yrgV2kQlZZ+"
-       "wuVqhc2NmzqeLH7bmcA6kchsRWFPeVF5Wqjjaj556ABeUoUr3yBmfU3kWOakkg==",
-       uint64_t{0x9625b859be372cd1}, uint64_t{0x27992565b595c498}},
-      {"d23/vc5ONh/"
-       "HkMiq+gYk4gaCNYyuFKwUkvn46t+dfVcKfBTYykr4kdvAPNXGYLjM4u1YkAEFpJP+"
-       "nX7eOvs=",
-       uint64_t{0x7b99940782e29898}, uint64_t{0x3e08cca5b71f9346}},
-      {"NUR3SRxBkxTSbtQORJpu/GdR6b/h6sSGfsMj/KFd99ahbh+9r7LSgSGmkGVB/"
-       "mGoT0pnMTQst7Lv2q6QN6Vm",
-       uint64_t{0x4fe12fa5383b51a8}, uint64_t{0xad406b10c770a6d2}},
-      {"2BOFlcI3Z0RYDtS9T9Ie9yJoXlOdigpPeeT+CRujb/"
-       "O39Ih5LPC9hP6RQk1kYESGyaLZZi3jtabHs7DiVx/VDg==",
-       uint64_t{0xe2ccb09ac0f5b4b6}, uint64_t{0xd1713ce6e552bcf2}},
-      {"FF2HQE1FxEvWBpg6Z9zAMH+Zlqx8S1JD/"
-       "wIlViL6ZDZY63alMDrxB0GJQahmAtjlm26RGLnjW7jmgQ4Ie3I+014=",
-       uint64_t{0x7d0a37adbd7b753b}, uint64_t{0x753b287194c73ad3}},
-      {"tHmO7mqVL/PX11nZrz50Hc+M17Poj5lpnqHkEN+4bpMx/"
-       "YGbkrGOaYjoQjgmt1X2QyypK7xClFrjeWrCMdlVYtbW",
-       uint64_t{0xd3ae96ef9f7185f2}, uint64_t{0x5ae41a95f600af1c}},
-      {"/WiHi9IQcxRImsudkA/KOTqGe8/"
-       "gXkhKIHkjddv5S9hi02M049dIK3EUyAEjkjpdGLUs+BN0QzPtZqjIYPOgwsYE9g==",
-       uint64_t{0x4fb88ea63f79a0d8}, uint64_t{0x4a61163b86a8bb4c}},
-      {"qds+1ExSnU11L4fTSDz/QE90g4Jh6ioqSh3KDOTOAo2pQGL1k/"
-       "9CCC7J23YF27dUTzrWsCQA2m4epXoCc3yPHb3xElA=",
-       uint64_t{0xed564e259bb5ebe9}, uint64_t{0x42eeaa79e760c7e4}},
-      {"8FVYHx40lSQPTHheh08Oq0/"
-       "pGm2OlG8BEf8ezvAxHuGGdgCkqpXIueJBF2mQJhTfDy5NncO8ntS7vaKs7sCNdDaNGOEi",
-       uint64_t{0x3e3256b60c428000}, uint64_t{0x698df622ef465b0a}},
-      {"4ZoEIrJtstiCkeew3oRzmyJHVt/pAs2pj0HgHFrBPztbQ10NsQ/"
-       "lM6DM439QVxpznnBSiHMgMQJhER+70l72LqFTO1JiIQ==",
-       uint64_t{0xfb05bad59ec8705}, uint64_t{0x157583111e1a6026}},
-      {"hQPtaYI+wJyxXgwD5n8jGIKFKaFA/"
-       "P83KqCKZfPthnjwdOFysqEOYwAaZuaaiv4cDyi9TyS8hk5cEbNP/jrI7q6pYGBLbsM=",
-       uint64_t{0xafdc251dbf97b5f8}, uint64_t{0xaa1388f078e793e0}},
-      {"S4gpMSKzMD7CWPsSfLeYyhSpfWOntyuVZdX1xSBjiGvsspwOZcxNKCRIOqAA0moUfOh3I5+"
-       "juQV4rsqYElMD/gWfDGpsWZKQ",
-       uint64_t{0x10ec9c92ddb5dcbc}, uint64_t{0xf10d68d0f3309360}},
-      {"oswxop+"
-       "bthuDLT4j0PcoSKby4LhF47ZKg8K17xxHf74UsGCzTBbOz0MM8hQEGlyqDT1iUiAYnaPaUp"
-       "L2mRK0rcIUYA4qLt5uOw==",
-       uint64_t{0x9a767d5822c7dac4}, uint64_t{0x2af056184457a3de}},
-      {"0II/"
-       "697p+"
-       "BtLSjxj5989OXI004TogEb94VUnDzOVSgMXie72cuYRvTFNIBgtXlKfkiUjeqVpd4a+"
-       "n5bxNOD1TGrjQtzKU5r7obo=",
-       uint64_t{0xee46254080d6e2db}, uint64_t{0x6d0058e1590b2489}},
-      {"E84YZW2qipAlMPmctrg7TKlwLZ68l4L+c0xRDUfyyFrA4MAti0q9sHq3TDFviH0Y+"
-       "Kq3tEE5srWFA8LM9oomtmvm5PYxoaarWPLc",
-       uint64_t{0xbbb669588d8bf398}, uint64_t{0x638f287f68817f12}},
-      {"x3pa4HIElyZG0Nj7Vdy9IdJIR4izLmypXw5PCmZB5y68QQ4uRaVVi3UthsoJROvbjDJkP2D"
-       "Q6L/eN8pFeLFzNPKBYzcmuMOb5Ull7w==",
-       uint64_t{0xdc2afaa529beef44}, uint64_t{0xc46b71fecefd5467}},
-      {"jVDKGYIuWOP/"
-       "QKLdd2wi8B2VJA8Wh0c8PwrXJVM8FOGM3voPDVPyDJOU6QsBDPseoR8uuKd19OZ/"
-       "zAvSCB+zlf6upAsBlheUKgCfKww=",
-       uint64_t{0xf1f67391d45013a8}, uint64_t{0x2c8e94679d964e0a}},
-      {"mkquunhmYe1aR2wmUz4vcvLEcKBoe6H+kjUok9VUn2+eTSkWs4oDDtJvNCWtY5efJwg/"
-       "j4PgjRYWtqnrCkhaqJaEvkkOwVfgMIwF3e+d",
-       uint64_t{0x16fce2b8c65a3429}, uint64_t{0x8612b797ce22503a}},
-      {"fRelvKYonTQ+s+rnnvQw+JzGfFoPixtna0vzcSjiDqX5s2Kg2//"
-       "UGrK+AVCyMUhO98WoB1DDbrsOYSw2QzrcPe0+3ck9sePvb+Q/IRaHbw==",
-       uint64_t{0xf4b096699f49fe67}, uint64_t{0x59f929babfba7170}},
-      {"DUwXFJzagljo44QeJ7/"
-       "6ZKw4QXV18lhkYT2jglMr8WB3CHUU4vdsytvw6AKv42ZcG6fRkZkq9fpnmXy6xG0aO3WPT1"
-       "eHuyFirAlkW+zKtwg=",
-       uint64_t{0xca584c4bc8198682}, uint64_t{0x9527556923fb49a0}},
-      {"cYmZCrOOBBongNTr7e4nYn52uQUy2mfe48s50JXx2AZ6cRAt/"
-       "xRHJ5QbEoEJOeOHsJyM4nbzwFm++SlT6gFZZHJpkXJ92JkR86uS/eV1hJUR",
-       uint64_t{0xed269fc3818b6aad}, uint64_t{0x1039ab644f5e150b}},
-      {"EXeHBDfhwzAKFhsMcH9+2RHwV+mJaN01+9oacF6vgm8mCXRd6jeN9U2oAb0of5c5cO4i+"
-       "Vb/LlHZSMI490SnHU0bejhSCC2gsC5d2K30ER3iNA==",
-       uint64_t{0x33f253cbb8fe66a8}, uint64_t{0x7816c83f3aa05e6d}},
-      {"FzkzRYoNjkxFhZDso94IHRZaJUP61nFYrh5MwDwv9FNoJ5jyNCY/"
-       "eazPZk+tbmzDyJIGw2h3GxaWZ9bSlsol/vK98SbkMKCQ/wbfrXRLcDzdd/8=",
-       uint64_t{0xd0b76b2c1523d99c}, uint64_t{0xf51d2f564518c619}},
-      {"Re4aXISCMlYY/XsX7zkIFR04ta03u4zkL9dVbLXMa/q6hlY/CImVIIYRN3VKP4pnd0AUr/"
-       "ugkyt36JcstAInb4h9rpAGQ7GMVOgBniiMBZ/MGU7H",
-       uint64_t{0xfd28f0811a2a237f}, uint64_t{0x67d494cff03ac004}},
-      {"ueLyMcqJXX+MhO4UApylCN9WlTQ+"
-       "ltJmItgG7vFUtqs2qNwBMjmAvr5u0sAKd8jpzV0dDPTwchbIeAW5zbtkA2NABJV6hFM48ib"
-       "4/J3A5mseA3cS8w==",
-       uint64_t{0x6261fb136482e84}, uint64_t{0x2802d636ced1cfbb}},
-      {"6Si7Yi11L+jZMkwaN+GUuzXMrlvEqviEkGOilNq0h8TdQyYKuFXzkYc/"
-       "q74gP3pVCyiwz9KpVGMM9vfnq36riMHRknkmhQutxLZs5fbmOgEO69HglCU=",
-       uint64_t{0x458efc750bca7c3a}, uint64_t{0xf64e20bad771cb12}},
-      {"Q6AbOofGuTJOegPh9Clm/"
-       "9crtUMQqylKrTc1fhfJo1tqvpXxhU4k08kntL1RG7woRnFrVh2UoMrL1kjin+s9CanT+"
-       "y4hHwLqRranl9FjvxfVKm3yvg68",
-       uint64_t{0xa7e69ff84e5e7c27}, uint64_t{0xb9a6cf84a83e15e}},
-      {"ieQEbIPvqY2YfIjHnqfJiO1/MIVRk0RoaG/WWi3kFrfIGiNLCczYoklgaecHMm/"
-       "1sZ96AjO+a5stQfZbJQwS7Sc1ODABEdJKcTsxeW2hbh9A6CFzpowP1A==",
-       uint64_t{0x3c59bfd0c29efe9e}, uint64_t{0x8da6630319609301}},
-      {"zQUv8hFB3zh2GGl3KTvCmnfzE+"
-       "SUgQPVaSVIELFX5H9cE3FuVFGmymkPQZJLAyzC90Cmi8GqYCvPqTuAAB//"
-       "XTJxy4bCcVArgZG9zJXpjowpNBfr3ngWrSE=",
-       uint64_t{0x10befacc6afd298d}, uint64_t{0x40946a86e2a996f3}},
-      {"US4hcC1+op5JKGC7eIs8CUgInjKWKlvKQkapulxW262E/"
-       "B2ye79QxOexf188u2mFwwe3WTISJHRZzS61IwljqAWAWoBAqkUnW8SHmIDwHUP31J0p5sGd"
-       "P47L",
-       uint64_t{0x41d5320b0a38efa7}, uint64_t{0xcab7f5997953fa76}},
-      {"9bHUWFna2LNaGF6fQLlkx1Hkt24nrkLE2CmFdWgTQV3FFbUe747SSqYw6ebpTa07MWSpWRP"
-       "sHesVo2B9tqHbe7eQmqYebPDFnNqrhSdZwFm9arLQVs+7a3Ic6A==",
-       uint64_t{0x58db1c7450fe17f3}, uint64_t{0x39129ca0e04fc465}},
-      {"Kb3DpHRUPhtyqgs3RuXjzA08jGb59hjKTOeFt1qhoINfYyfTt2buKhD6YVffRCPsgK9SeqZ"
-       "qRPJSyaqsa0ovyq1WnWW8jI/NhvAkZTVHUrX2pC+cD3OPYT05Dag=",
-       uint64_t{0x6098c055a335b7a6}, uint64_t{0x5238221fd685e1b8}},
-      {"gzxyMJIPlU+bJBwhFUCHSofZ/"
-       "319LxqMoqnt3+L6h2U2+ZXJCSsYpE80xmR0Ta77Jq54o92SMH87HV8dGOaCTuAYF+"
-       "lDL42SY1P316Cl0sZTS2ow3ZqwGbcPNs/1",
-       uint64_t{0x1bbacec67845a801}, uint64_t{0x175130c407dbcaab}},
-      {"uR7V0TW+FGVMpsifnaBAQ3IGlr1wx5sKd7TChuqRe6OvUXTlD4hKWy8S+"
-       "8yyOw8lQabism19vOQxfmocEOW/"
-       "vzY0pEa87qHrAZy4s9fH2Bltu8vaOIe+agYohhYORQ==",
-       uint64_t{0xc419cfc7442190}, uint64_t{0x2f20e7536c0b0df}},
-      {"1UR5eoo2aCwhacjZHaCh9bkOsITp6QunUxHQ2SfeHv0imHetzt/"
-       "Z70mhyWZBalv6eAx+YfWKCUib2SHDtz/"
-       "A2dc3hqUWX5VfAV7FQsghPUAtu6IiRatq4YSLpDvKZBQ=",
-       uint64_t{0xc95e510d94ba270c}, uint64_t{0x2742cb488a04ad56}},
-      {"opubR7H63BH7OtY+Avd7QyQ25UZ8kLBdFDsBTwZlY6gA/"
-       "u+x+"
-       "czC9AaZMgmQrUy15DH7YMGsvdXnviTtI4eVI4aF1H9Rl3NXMKZgwFOsdTfdcZeeHVRzBBKX"
-       "8jUfh1il",
-       uint64_t{0xff1ae05c98089c3f}, uint64_t{0xd6afb593879ff93b}},
-      {"DC0kXcSXtfQ9FbSRwirIn5tgPri0sbzHSa78aDZVDUKCMaBGyFU6BmrulywYX8yzvwprdLs"
-       "oOwTWN2wMjHlPDqrvVHNEjnmufRDblW+nSS+xtKNs3N5xsxXdv6JXDrAB/Q==",
-       uint64_t{0x90c02b8dceced493}, uint64_t{0xf50ad64caac0ca7f}},
-      {"BXRBk+3wEP3Lpm1y75wjoz+PgB0AMzLe8tQ1AYU2/"
-       "oqrQB2YMC6W+9QDbcOfkGbeH+b7IBkt/"
-       "gwCMw2HaQsRFEsurXtcQ3YwRuPz5XNaw5NAvrNa67Fm7eRzdE1+hWLKtA8=",
-       uint64_t{0x9f8a76697ab1aa36}, uint64_t{0x2ade95c4261364ae}},
-      {"RRBSvEGYnzR9E45Aps/+WSnpCo/X7gJLO4DRnUqFrJCV/kzWlusLE/"
-       "6ZU6RoUf2ROwcgEvUiXTGjLs7ts3t9SXnJHxC1KiOzxHdYLMhVvgNd3hVSAXODpKFSkVXND"
-       "55G2L1W",
-       uint64_t{0x6ba1bf3d811a531d}, uint64_t{0x5c4f3299faacd07a}},
-      {"jeh6Qazxmdi57pa9S3XSnnZFIRrnc6s8QLrah5OX3SB/V2ErSPoEAumavzQPkdKF1/"
-       "SfvmdL+qgF1C+Yawy562QaFqwVGq7+tW0yxP8FStb56ZRgNI4IOmI30s1Ei7iops9Uuw==",
-       uint64_t{0x6a418974109c67b4}, uint64_t{0xfffe3bff0ae5e9bc}},
-      {"6QO5nnDrY2/"
-       "wrUXpltlKy2dSBcmK15fOY092CR7KxAjNfaY+"
-       "aAmtWbbzQk3MjBg03x39afSUN1fkrWACdyQKRaGxgwq6MGNxI6W+8DLWJBHzIXrntrE/"
-       "ml6fnNXEpxplWJ1vEs4=",
-       uint64_t{0x8472f1c2b3d230a3}, uint64_t{0x1db785c0005166e4}},
-      {"0oPxeEHhqhcFuwonNfLd5jF3RNATGZS6NPoS0WklnzyokbTqcl4BeBkMn07+fDQv83j/"
-       "BpGUwcWO05f3+DYzocfnizpFjLJemFGsls3gxcBYxcbqWYev51tG3lN9EvRE+X9+Pwww",
-       uint64_t{0x5e06068f884e73a7}, uint64_t{0xea000d962ad18418}},
-      {"naSBSjtOKgAOg8XVbR5cHAW3Y+QL4Pb/JO9/"
-       "oy6L08wvVRZqo0BrssMwhzBP401Um7A4ppAupbQeJFdMrysY34AuSSNvtNUy5VxjNECwiNt"
-       "gwYHw7yakDUv8WvonctmnoSPKENegQg==",
-       uint64_t{0x55290b1a8f170f59}, uint64_t{0xe42aef38359362d9}},
-      {"vPyl8DxVeRe1OpilKb9KNwpGkQRtA94UpAHetNh+"
-       "95V7nIW38v7PpzhnTWIml5kw3So1Si0TXtIUPIbsu32BNhoH7QwFvLM+"
-       "JACgSpc5e3RjsL6Qwxxi11npwxRmRUqATDeMUfRAjxg=",
-       uint64_t{0x5501cfd83dfe706a}, uint64_t{0xc8e95657348a3891}},
-      {"QC9i2GjdTMuNC1xQJ74ngKfrlA4w3o58FhvNCltdIpuMhHP1YsDA78scQPLbZ3OCUgeQguY"
-       "f/vw6zAaVKSgwtaykqg5ka/4vhz4hYqWU5ficdXqClHl+zkWEY26slCNYOM5nnDlly8Cj",
-       uint64_t{0xe43ed13d13a66990}, uint64_t{0xc162eca864f238c6}},
-      {"7CNIgQhAHX27nxI0HeB5oUTnTdgKpRDYDKwRcXfSFGP1XeT9nQF6WKCMjL1tBV6x7KuJ91G"
-       "Zz11F4c+8s+MfqEAEpd4FHzamrMNjGcjCyrVtU6y+7HscMVzr7Q/"
-       "ODLcPEFztFnwjvCjmHw==",
-       uint64_t{0xdf43bc375cf5283f}, uint64_t{0xbe1fb373e20579ad}},
-      {"Qa/hC2RPXhANSospe+gUaPfjdK/yhQvfm4cCV6/pdvCYWPv8p1kMtKOX3h5/"
-       "8oZ31fsmx4Axphu5qXJokuhZKkBUJueuMpxRyXpwSWz2wELx5glxF7CM0Fn+"
-       "OevnkhUn5jsPlG2r5jYlVn8=",
-       uint64_t{0x8112b806d288d7b5}, uint64_t{0x628a1d4f40aa6ffd}},
-      {"kUw/0z4l3a89jTwN5jpG0SHY5km/"
-       "IVhTjgM5xCiPRLncg40aqWrJ5vcF891AOq5hEpSq0bUCJUMFXgct7kvnys905HjerV7Vs1G"
-       "y84tgVJ70/2+pAZTsB/PzNOE/G6sOj4+GbTzkQu819OLB",
-       uint64_t{0xd52a18abb001cb46}, uint64_t{0xa87bdb7456340f90}},
-      {"VDdfSDbO8Tdj3T5W0XM3EI7iHh5xpIutiM6dvcJ/fhe23V/srFEkDy5iZf/"
-       "VnA9kfi2C79ENnFnbOReeuZW1b3MUXB9lgC6U4pOTuC+"
-       "jHK3Qnpyiqzj7h3ISJSuo2pob7vY6VHZo6Fn7exEqHg==",
-       uint64_t{0xe12b76a2433a1236}, uint64_t{0x5960ef3ba982c801}},
-      {"Ldfvy3ORdquM/R2fIkhH/ONi69mcP1AEJ6n/"
-       "oropwecAsLJzQSgezSY8bEiEs0VnFTBBsW+RtZY6tDj03fnb3amNUOq1b7jbqyQkL9hpl+"
-       "2Z2J8IaVSeownWl+bQcsR5/xRktIMckC5AtF4YHfU=",
-       uint64_t{0x175bf7319cf1fa00}, uint64_t{0x5026586df9a431ec}},
-      {"BrbNpb42+"
-       "VzZAjJw6QLirXzhweCVRfwlczzZ0VX2xluskwBqyfnGovz5EuX79JJ31VNXa5hTkAyQat3l"
-       "YKRADTdAdwE5PqM1N7YaMqqsqoAAAeuYVXuk5eWCykYmClNdSspegwgCuT+403JigBzi",
-       uint64_t{0xd63d57b3f67525ae}, uint64_t{0xfe4b8a20fdf0840b}},
-      {"gB3NGHJJvVcuPyF0ZSvHwnWSIfmaI7La24VMPQVoIIWF7Z74NltPZZpx2f+cocESM+"
-       "ILzQW9p+BC8x5IWz7N4Str2WLGKMdgmaBfNkEhSHQDU0IJEOnpUt0HmjhFaBlx0/"
-       "LTmhua+rQ6Wup8ezLwfg==",
-       uint64_t{0x933faea858832b73}, uint64_t{0xdcb761867da7072f}},
-      {"hTKHlRxx6Pl4gjG+6ksvvj0CWFicUg3WrPdSJypDpq91LUWRni2KF6+"
-       "81ZoHBFhEBrCdogKqeK+hy9bLDnx7g6rAFUjtn1+cWzQ2YjiOpz4+"
-       "ROBB7lnwjyTGWzJD1rXtlso1g2qVH8XJVigC5M9AIxM=",
-       uint64_t{0x53d061e5f8e7c04f}, uint64_t{0xc10d4653667275b7}},
-      {"IWQBelSQnhrr0F3BhUpXUIDauhX6f95Qp+A0diFXiUK7irwPG1oqBiqHyK/SH/"
-       "9S+"
-       "rln9DlFROAmeFdH0OCJi2tFm4afxYzJTFR4HnR4cG4x12JqHaZLQx6iiu6CE3rtWBVz99oA"
-       "wCZUOEXIsLU24o2Y",
-       uint64_t{0xdb4124556dd515e0}, uint64_t{0x727720deec13110b}},
-      {"TKo+l+"
-       "1dOXdLvIrFqeLaHdm0HZnbcdEgOoLVcGRiCbAMR0j5pIFw8D36tefckAS1RCFOH5IgP8yiF"
-       "T0Gd0a2hI3+"
-       "fTKA7iK96NekxWeoeqzJyctc6QsoiyBlkZerRxs5RplrxoeNg29kKDTM0K94mnhD9g==",
-       uint64_t{0x4fb31a0dd681ee71}, uint64_t{0x710b009662858dc9}},
-      {"YU4e7G6EfQYvxCFoCrrT0EFgVLHFfOWRTJQJ5gxM3G2b+"
-       "1kJf9YPrpsxF6Xr6nYtS8reEEbDoZJYqnlk9lXSkVArm88Cqn6d25VCx3+"
-       "49MqC0trIlXtb7SXUUhwpJK16T0hJUfPH7s5cMZXc6YmmbFuBNPE=",
-       uint64_t{0x27cc72eefa138e4c}, uint64_t{0xfbf8f7a3ecac1eb7}},
-      {"/I/"
-       "eImMwPo1U6wekNFD1Jxjk9XQVi1D+"
-       "FPdqcHifYXQuP5aScNQfxMAmaPR2XhuOQhADV5tTVbBKwCDCX4E3jcDNHzCiPvViZF1W27t"
-       "xaf2BbFQdwKrNCmrtzcluBFYu0XZfc7RU1RmxK/RtnF1qHsq/O4pp",
-       uint64_t{0x44bc2dfba4bd3ced}, uint64_t{0xb6fc4fcd0722e3df}},
-      {"CJTT9WGcY2XykTdo8KodRIA29qsqY0iHzWZRjKHb9alwyJ7RZAE3V5Juv4MY3MeYEr1EPCC"
-       "MxO7yFXqT8XA8YTjaMp3bafRt17Pw8JC4iKJ1zN+WWKOESrj+"
-       "3aluGQqn8z1EzqY4PH7rLG575PYeWsP98BugdA==",
-       uint64_t{0x242da1e3a439bed8}, uint64_t{0x7cb86dcc55104aac}},
-      {"ZlhyQwLhXQyIUEnMH/"
-       "AEW27vh9xrbNKJxpWGtrEmKhd+nFqAfbeNBQjW0SfG1YI0xQkQMHXjuTt4P/"
-       "EpZRtA47ibZDVS8TtaxwyBjuIDwqcN09eCtpC+Ls+"
-       "vWDTLmBeDM3u4hmzz4DQAYsLiZYSJcldg9Q3wszw=",
-       uint64_t{0xdc559c746e35c139}, uint64_t{0x19e71e9b45c3a51e}},
-      {"v2KU8y0sCrBghmnm8lzGJlwo6D6ObccAxCf10heoDtYLosk4ztTpLlpSFEyu23MLA1tJkcg"
-       "Rko04h19QMG0mOw/"
-       "wc93EXAweriBqXfvdaP85sZABwiKO+6rtS9pacRVpYYhHJeVTQ5NzrvBvi1huxAr+"
-       "xswhVMfL",
-       uint64_t{0xd0b0350275b9989}, uint64_t{0x51de38573c2bea48}},
-      {"QhKlnIS6BuVCTQsnoE67E/"
-       "yrgogE8EwO7xLaEGei26m0gEU4OksefJgppDh3X0x0Cs78Dr9IHK5b977CmZlrTRmwhlP8p"
-       "M+UzXPNRNIZuN3ntOum/QhUWP8SGpirheXENWsXMQ/"
-       "nxtxakyEtrNkKk471Oov9juP8oQ==",
-       uint64_t{0xb04489e41d17730c}, uint64_t{0xa73ab6996d6df158}},
-      {"/ZRMgnoRt+Uo6fUPr9FqQvKX7syhgVqWu+"
-       "WUSsiQ68UlN0efSP6Eced5gJZL6tg9gcYJIkhjuQNITU0Q3TjVAnAcobgbJikCn6qZ6pRxK"
-       "BY4MTiAlfGD3T7R7hwJwx554MAy++Zb/YUFlnCaCJiwQMnowF7aQzwYFCo=",
-       uint64_t{0x2217285eb4572156}, uint64_t{0x55ef2b8c930817b2}},
-      {"NB7tU5fNE8nI+SXGfipc7sRkhnSkUF1krjeo6k+8FITaAtdyz+"
-       "o7mONgXmGLulBPH9bEwyYhKNVY0L+njNQrZ9YC2aXsFD3PdZsxAFaBT3VXEzh+"
-       "NGBTjDASNL3mXyS8Yv1iThGfHoY7T4aR0NYGJ+k+pR6f+KrPC96M",
-       uint64_t{0x12c2e8e68aede73b}, uint64_t{0xb2850bf5fae87157}},
-      {"8T6wrqCtEO6/rwxF6lvMeyuigVOLwPipX/FULvwyu+1wa5sQGav/"
-       "2FsLHUVn6cGSi0LlFwLewGHPFJDLR0u4t7ZUyM//"
-       "x6da0sWgOa5hzDqjsVGmjxEHXiaXKW3i4iSZNuxoNbMQkIbVML+"
-       "DkYu9ND0O2swg4itGeVSzXA==",
-       uint64_t{0x4d612125bdc4fd00}, uint64_t{0xecf3de1acd04651f}},
-      {"Ntf1bMRdondtMv1CYr3G80iDJ4WSAlKy5H34XdGruQiCrnRGDBa+"
-       "eUi7vKp4gp3BBcVGl8eYSasVQQjn7MLvb3BjtXx6c/"
-       "bCL7JtpzQKaDnPr9GWRxpBXVxKREgMM7d8lm35EODv0w+"
-       "hQLfVSh8OGs7fsBb68nNWPLeeSOo=",
-       uint64_t{0x81826b553954464e}, uint64_t{0xcc0a40552559ff32}},
-      {"VsSAw72Ro6xks02kaiLuiTEIWBC5bgqr4WDnmP8vglXzAhixk7td926rm9jNimL+"
-       "kroPSygZ9gl63aF5DCPOACXmsbmhDrAQuUzoh9ZKhWgElLQsrqo1KIjWoZT5b5QfVUXY9lS"
-       "IBg3U75SqORoTPq7HalxxoIT5diWOcJQi",
-       uint64_t{0xc2e5d345dc0ddd2d}, uint64_t{0xc385c374f20315b1}},
-      {"j+loZ+C87+"
-       "bJxNVebg94gU0mSLeDulcHs84tQT7BZM2rzDSLiCNxUedHr1ZWJ9ejTiBa0dqy2I2ABc++"
-       "xzOLcv+//YfibtjKtYggC6/3rv0XCc7xu6d/"
-       "O6xO+XOBhOWAQ+IHJVHf7wZnDxIXB8AUHsnjEISKj7823biqXjyP3g==",
-       uint64_t{0x3da6830a9e32631e}, uint64_t{0xb90208a4c7234183}},
-      {"f3LlpcPElMkspNtDq5xXyWU62erEaKn7RWKlo540gR6mZsNpK1czV/"
-       "sOmqaq8XAQLEn68LKj6/"
-       "cFkJukxRzCa4OF1a7cCAXYFp9+wZDu0bw4y63qbpjhdCl8GO6Z2lkcXy7KOzbPE01ukg7+"
-       "gN+7uKpoohgAhIwpAKQXmX5xtd0=",
-       uint64_t{0xc9ae5c8759b4877a}, uint64_t{0x58aa1ca7a4c075d9}},
-  };
-
-  for (const auto& expected_result : expected_results) {
-    std::string str;
-    ASSERT_TRUE(absl::Base64Unescape(expected_result.base64_data, &str));
-    EXPECT_EQ(absl::hash_internal::Wyhash(str.data(), str.size(),
-                                          expected_result.seed, kSalt),
-              expected_result.hash);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/memory/BUILD.bazel b/third_party/abseil/absl/memory/BUILD.bazel
deleted file mode 100644
index d2824a0..0000000
--- a/third_party/abseil/absl/memory/BUILD.bazel
+++ /dev/null
@@ -1,65 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "memory",
-    hdrs = ["memory.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "memory_test",
-    srcs = ["memory_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":memory",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "memory_exception_safety_test",
-    srcs = [
-        "memory_exception_safety_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":memory",
-        "//absl/base:config",
-        "//absl/base:exception_safety_testing",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/memory/CMakeLists.txt b/third_party/abseil/absl/memory/CMakeLists.txt
deleted file mode 100644
index 78fb7e1..0000000
--- a/third_party/abseil/absl/memory/CMakeLists.txt
+++ /dev/null
@@ -1,55 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    memory
-  HDRS
-    "memory.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::core_headers
-    absl::meta
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    memory_test
-  SRCS
-    "memory_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::memory
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    memory_exception_safety_test
-  SRCS
-    "memory_exception_safety_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::memory
-    absl::config
-    absl::exception_safety_testing
-    gmock_main
-)
diff --git a/third_party/abseil/absl/memory/memory.h b/third_party/abseil/absl/memory/memory.h
deleted file mode 100644
index 2b5ff62..0000000
--- a/third_party/abseil/absl/memory/memory.h
+++ /dev/null
@@ -1,699 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: memory.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains utility functions for managing the creation and
-// conversion of smart pointers. This file is an extension to the C++
-// standard <memory> library header file.
-
-#ifndef ABSL_MEMORY_MEMORY_H_
-#define ABSL_MEMORY_MEMORY_H_
-
-#include <cstddef>
-#include <limits>
-#include <memory>
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// Function Template: WrapUnique()
-// -----------------------------------------------------------------------------
-//
-// Adopts ownership from a raw pointer and transfers it to the returned
-// `std::unique_ptr`, whose type is deduced. Because of this deduction, *do not*
-// specify the template type `T` when calling `WrapUnique`.
-//
-// Example:
-//   X* NewX(int, int);
-//   auto x = WrapUnique(NewX(1, 2));  // 'x' is std::unique_ptr<X>.
-//
-// Do not call WrapUnique with an explicit type, as in
-// `WrapUnique<X>(NewX(1, 2))`.  The purpose of WrapUnique is to automatically
-// deduce the pointer type. If you wish to make the type explicit, just use
-// `std::unique_ptr` directly.
-//
-//   auto x = std::unique_ptr<X>(NewX(1, 2));
-//                  - or -
-//   std::unique_ptr<X> x(NewX(1, 2));
-//
-// While `absl::WrapUnique` is useful for capturing the output of a raw
-// pointer factory, prefer 'absl::make_unique<T>(args...)' over
-// 'absl::WrapUnique(new T(args...))'.
-//
-//   auto x = WrapUnique(new X(1, 2));  // works, but nonideal.
-//   auto x = make_unique<X>(1, 2);     // safer, standard, avoids raw 'new'.
-//
-// Note that `absl::WrapUnique(p)` is valid only if `delete p` is a valid
-// expression. In particular, `absl::WrapUnique()` cannot wrap pointers to
-// arrays, functions or void, and it must not be used to capture pointers
-// obtained from array-new expressions (even though that would compile!).
-template <typename T>
-std::unique_ptr<T> WrapUnique(T* ptr) {
-  static_assert(!std::is_array<T>::value, "array types are unsupported");
-  static_assert(std::is_object<T>::value, "non-object types are unsupported");
-  return std::unique_ptr<T>(ptr);
-}
-
-namespace memory_internal {
-
-// Traits to select proper overload and return type for `absl::make_unique<>`.
-template <typename T>
-struct MakeUniqueResult {
-  using scalar = std::unique_ptr<T>;
-};
-template <typename T>
-struct MakeUniqueResult<T[]> {
-  using array = std::unique_ptr<T[]>;
-};
-template <typename T, size_t N>
-struct MakeUniqueResult<T[N]> {
-  using invalid = void;
-};
-
-}  // namespace memory_internal
-
-// gcc 4.8 has __cplusplus at 201301 but the libstdc++ shipped with it doesn't
-// define make_unique.  Other supported compilers either just define __cplusplus
-// as 201103 but have make_unique (msvc), or have make_unique whenever
-// __cplusplus > 201103 (clang).
-#if (__cplusplus > 201103L || defined(_MSC_VER)) && \
-    !(defined(__GLIBCXX__) && !defined(__cpp_lib_make_unique))
-using std::make_unique;
-#else
-// -----------------------------------------------------------------------------
-// Function Template: make_unique<T>()
-// -----------------------------------------------------------------------------
-//
-// Creates a `std::unique_ptr<>`, while avoiding issues creating temporaries
-// during the construction process. `absl::make_unique<>` also avoids redundant
-// type declarations, by avoiding the need to explicitly use the `new` operator.
-//
-// This implementation of `absl::make_unique<>` is designed for C++11 code and
-// will be replaced in C++14 by the equivalent `std::make_unique<>` abstraction.
-// `absl::make_unique<>` is designed to be 100% compatible with
-// `std::make_unique<>` so that the eventual migration will involve a simple
-// rename operation.
-//
-// For more background on why `std::unique_ptr<T>(new T(a,b))` is problematic,
-// see Herb Sutter's explanation on
-// (Exception-Safe Function Calls)[https://herbsutter.com/gotw/_102/].
-// (In general, reviewers should treat `new T(a,b)` with scrutiny.)
-//
-// Example usage:
-//
-//    auto p = make_unique<X>(args...);  // 'p'  is a std::unique_ptr<X>
-//    auto pa = make_unique<X[]>(5);     // 'pa' is a std::unique_ptr<X[]>
-//
-// Three overloads of `absl::make_unique` are required:
-//
-//   - For non-array T:
-//
-//       Allocates a T with `new T(std::forward<Args> args...)`,
-//       forwarding all `args` to T's constructor.
-//       Returns a `std::unique_ptr<T>` owning that object.
-//
-//   - For an array of unknown bounds T[]:
-//
-//       `absl::make_unique<>` will allocate an array T of type U[] with
-//       `new U[n]()` and return a `std::unique_ptr<U[]>` owning that array.
-//
-//       Note that 'U[n]()' is different from 'U[n]', and elements will be
-//       value-initialized. Note as well that `std::unique_ptr` will perform its
-//       own destruction of the array elements upon leaving scope, even though
-//       the array [] does not have a default destructor.
-//
-//       NOTE: an array of unknown bounds T[] may still be (and often will be)
-//       initialized to have a size, and will still use this overload. E.g:
-//
-//         auto my_array = absl::make_unique<int[]>(10);
-//
-//   - For an array of known bounds T[N]:
-//
-//       `absl::make_unique<>` is deleted (like with `std::make_unique<>`) as
-//       this overload is not useful.
-//
-//       NOTE: an array of known bounds T[N] is not considered a useful
-//       construction, and may cause undefined behavior in templates. E.g:
-//
-//         auto my_array = absl::make_unique<int[10]>();
-//
-//       In those cases, of course, you can still use the overload above and
-//       simply initialize it to its desired size:
-//
-//         auto my_array = absl::make_unique<int[]>(10);
-
-// `absl::make_unique` overload for non-array types.
-template <typename T, typename... Args>
-typename memory_internal::MakeUniqueResult<T>::scalar make_unique(
-    Args&&... args) {
-  return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
-}
-
-// `absl::make_unique` overload for an array T[] of unknown bounds.
-// The array allocation needs to use the `new T[size]` form and cannot take
-// element constructor arguments. The `std::unique_ptr` will manage destructing
-// these array elements.
-template <typename T>
-typename memory_internal::MakeUniqueResult<T>::array make_unique(size_t n) {
-  return std::unique_ptr<T>(new typename absl::remove_extent_t<T>[n]());
-}
-
-// `absl::make_unique` overload for an array T[N] of known bounds.
-// This construction will be rejected.
-template <typename T, typename... Args>
-typename memory_internal::MakeUniqueResult<T>::invalid make_unique(
-    Args&&... /* args */) = delete;
-#endif
-
-// -----------------------------------------------------------------------------
-// Function Template: RawPtr()
-// -----------------------------------------------------------------------------
-//
-// Extracts the raw pointer from a pointer-like value `ptr`. `absl::RawPtr` is
-// useful within templates that need to handle a complement of raw pointers,
-// `std::nullptr_t`, and smart pointers.
-template <typename T>
-auto RawPtr(T&& ptr) -> decltype(std::addressof(*ptr)) {
-  // ptr is a forwarding reference to support Ts with non-const operators.
-  return (ptr != nullptr) ? std::addressof(*ptr) : nullptr;
-}
-inline std::nullptr_t RawPtr(std::nullptr_t) { return nullptr; }
-
-// -----------------------------------------------------------------------------
-// Function Template: ShareUniquePtr()
-// -----------------------------------------------------------------------------
-//
-// Adopts a `std::unique_ptr` rvalue and returns a `std::shared_ptr` of deduced
-// type. Ownership (if any) of the held value is transferred to the returned
-// shared pointer.
-//
-// Example:
-//
-//     auto up = absl::make_unique<int>(10);
-//     auto sp = absl::ShareUniquePtr(std::move(up));  // shared_ptr<int>
-//     CHECK_EQ(*sp, 10);
-//     CHECK(up == nullptr);
-//
-// Note that this conversion is correct even when T is an array type, and more
-// generally it works for *any* deleter of the `unique_ptr` (single-object
-// deleter, array deleter, or any custom deleter), since the deleter is adopted
-// by the shared pointer as well. The deleter is copied (unless it is a
-// reference).
-//
-// Implements the resolution of [LWG 2415](http://wg21.link/lwg2415), by which a
-// null shared pointer does not attempt to call the deleter.
-template <typename T, typename D>
-std::shared_ptr<T> ShareUniquePtr(std::unique_ptr<T, D>&& ptr) {
-  return ptr ? std::shared_ptr<T>(std::move(ptr)) : std::shared_ptr<T>();
-}
-
-// -----------------------------------------------------------------------------
-// Function Template: WeakenPtr()
-// -----------------------------------------------------------------------------
-//
-// Creates a weak pointer associated with a given shared pointer. The returned
-// value is a `std::weak_ptr` of deduced type.
-//
-// Example:
-//
-//    auto sp = std::make_shared<int>(10);
-//    auto wp = absl::WeakenPtr(sp);
-//    CHECK_EQ(sp.get(), wp.lock().get());
-//    sp.reset();
-//    CHECK(wp.lock() == nullptr);
-//
-template <typename T>
-std::weak_ptr<T> WeakenPtr(const std::shared_ptr<T>& ptr) {
-  return std::weak_ptr<T>(ptr);
-}
-
-namespace memory_internal {
-
-// ExtractOr<E, O, D>::type evaluates to E<O> if possible. Otherwise, D.
-template <template <typename> class Extract, typename Obj, typename Default,
-          typename>
-struct ExtractOr {
-  using type = Default;
-};
-
-template <template <typename> class Extract, typename Obj, typename Default>
-struct ExtractOr<Extract, Obj, Default, void_t<Extract<Obj>>> {
-  using type = Extract<Obj>;
-};
-
-template <template <typename> class Extract, typename Obj, typename Default>
-using ExtractOrT = typename ExtractOr<Extract, Obj, Default, void>::type;
-
-// Extractors for the features of allocators.
-template <typename T>
-using GetPointer = typename T::pointer;
-
-template <typename T>
-using GetConstPointer = typename T::const_pointer;
-
-template <typename T>
-using GetVoidPointer = typename T::void_pointer;
-
-template <typename T>
-using GetConstVoidPointer = typename T::const_void_pointer;
-
-template <typename T>
-using GetDifferenceType = typename T::difference_type;
-
-template <typename T>
-using GetSizeType = typename T::size_type;
-
-template <typename T>
-using GetPropagateOnContainerCopyAssignment =
-    typename T::propagate_on_container_copy_assignment;
-
-template <typename T>
-using GetPropagateOnContainerMoveAssignment =
-    typename T::propagate_on_container_move_assignment;
-
-template <typename T>
-using GetPropagateOnContainerSwap = typename T::propagate_on_container_swap;
-
-template <typename T>
-using GetIsAlwaysEqual = typename T::is_always_equal;
-
-template <typename T>
-struct GetFirstArg;
-
-template <template <typename...> class Class, typename T, typename... Args>
-struct GetFirstArg<Class<T, Args...>> {
-  using type = T;
-};
-
-template <typename Ptr, typename = void>
-struct ElementType {
-  using type = typename GetFirstArg<Ptr>::type;
-};
-
-template <typename T>
-struct ElementType<T, void_t<typename T::element_type>> {
-  using type = typename T::element_type;
-};
-
-template <typename T, typename U>
-struct RebindFirstArg;
-
-template <template <typename...> class Class, typename T, typename... Args,
-          typename U>
-struct RebindFirstArg<Class<T, Args...>, U> {
-  using type = Class<U, Args...>;
-};
-
-template <typename T, typename U, typename = void>
-struct RebindPtr {
-  using type = typename RebindFirstArg<T, U>::type;
-};
-
-template <typename T, typename U>
-struct RebindPtr<T, U, void_t<typename T::template rebind<U>>> {
-  using type = typename T::template rebind<U>;
-};
-
-template <typename T, typename U>
-constexpr bool HasRebindAlloc(...) {
-  return false;
-}
-
-template <typename T, typename U>
-constexpr bool HasRebindAlloc(typename T::template rebind<U>::other*) {
-  return true;
-}
-
-template <typename T, typename U, bool = HasRebindAlloc<T, U>(nullptr)>
-struct RebindAlloc {
-  using type = typename RebindFirstArg<T, U>::type;
-};
-
-template <typename T, typename U>
-struct RebindAlloc<T, U, true> {
-  using type = typename T::template rebind<U>::other;
-};
-
-}  // namespace memory_internal
-
-// -----------------------------------------------------------------------------
-// Class Template: pointer_traits
-// -----------------------------------------------------------------------------
-//
-// An implementation of C++11's std::pointer_traits.
-//
-// Provided for portability on toolchains that have a working C++11 compiler,
-// but the standard library is lacking in C++11 support. For example, some
-// version of the Android NDK.
-//
-
-template <typename Ptr>
-struct pointer_traits {
-  using pointer = Ptr;
-
-  // element_type:
-  // Ptr::element_type if present. Otherwise T if Ptr is a template
-  // instantiation Template<T, Args...>
-  using element_type = typename memory_internal::ElementType<Ptr>::type;
-
-  // difference_type:
-  // Ptr::difference_type if present, otherwise std::ptrdiff_t
-  using difference_type =
-      memory_internal::ExtractOrT<memory_internal::GetDifferenceType, Ptr,
-                                  std::ptrdiff_t>;
-
-  // rebind:
-  // Ptr::rebind<U> if exists, otherwise Template<U, Args...> if Ptr is a
-  // template instantiation Template<T, Args...>
-  template <typename U>
-  using rebind = typename memory_internal::RebindPtr<Ptr, U>::type;
-
-  // pointer_to:
-  // Calls Ptr::pointer_to(r)
-  static pointer pointer_to(element_type& r) {  // NOLINT(runtime/references)
-    return Ptr::pointer_to(r);
-  }
-};
-
-// Specialization for T*.
-template <typename T>
-struct pointer_traits<T*> {
-  using pointer = T*;
-  using element_type = T;
-  using difference_type = std::ptrdiff_t;
-
-  template <typename U>
-  using rebind = U*;
-
-  // pointer_to:
-  // Calls std::addressof(r)
-  static pointer pointer_to(
-      element_type& r) noexcept {  // NOLINT(runtime/references)
-    return std::addressof(r);
-  }
-};
-
-// -----------------------------------------------------------------------------
-// Class Template: allocator_traits
-// -----------------------------------------------------------------------------
-//
-// A C++11 compatible implementation of C++17's std::allocator_traits.
-//
-#if __cplusplus >= 201703L
-using std::allocator_traits;
-#else  // __cplusplus >= 201703L
-template <typename Alloc>
-struct allocator_traits {
-  using allocator_type = Alloc;
-
-  // value_type:
-  // Alloc::value_type
-  using value_type = typename Alloc::value_type;
-
-  // pointer:
-  // Alloc::pointer if present, otherwise value_type*
-  using pointer = memory_internal::ExtractOrT<memory_internal::GetPointer,
-                                              Alloc, value_type*>;
-
-  // const_pointer:
-  // Alloc::const_pointer if present, otherwise
-  // absl::pointer_traits<pointer>::rebind<const value_type>
-  using const_pointer =
-      memory_internal::ExtractOrT<memory_internal::GetConstPointer, Alloc,
-                                  typename absl::pointer_traits<pointer>::
-                                      template rebind<const value_type>>;
-
-  // void_pointer:
-  // Alloc::void_pointer if present, otherwise
-  // absl::pointer_traits<pointer>::rebind<void>
-  using void_pointer = memory_internal::ExtractOrT<
-      memory_internal::GetVoidPointer, Alloc,
-      typename absl::pointer_traits<pointer>::template rebind<void>>;
-
-  // const_void_pointer:
-  // Alloc::const_void_pointer if present, otherwise
-  // absl::pointer_traits<pointer>::rebind<const void>
-  using const_void_pointer = memory_internal::ExtractOrT<
-      memory_internal::GetConstVoidPointer, Alloc,
-      typename absl::pointer_traits<pointer>::template rebind<const void>>;
-
-  // difference_type:
-  // Alloc::difference_type if present, otherwise
-  // absl::pointer_traits<pointer>::difference_type
-  using difference_type = memory_internal::ExtractOrT<
-      memory_internal::GetDifferenceType, Alloc,
-      typename absl::pointer_traits<pointer>::difference_type>;
-
-  // size_type:
-  // Alloc::size_type if present, otherwise
-  // std::make_unsigned<difference_type>::type
-  using size_type = memory_internal::ExtractOrT<
-      memory_internal::GetSizeType, Alloc,
-      typename std::make_unsigned<difference_type>::type>;
-
-  // propagate_on_container_copy_assignment:
-  // Alloc::propagate_on_container_copy_assignment if present, otherwise
-  // std::false_type
-  using propagate_on_container_copy_assignment = memory_internal::ExtractOrT<
-      memory_internal::GetPropagateOnContainerCopyAssignment, Alloc,
-      std::false_type>;
-
-  // propagate_on_container_move_assignment:
-  // Alloc::propagate_on_container_move_assignment if present, otherwise
-  // std::false_type
-  using propagate_on_container_move_assignment = memory_internal::ExtractOrT<
-      memory_internal::GetPropagateOnContainerMoveAssignment, Alloc,
-      std::false_type>;
-
-  // propagate_on_container_swap:
-  // Alloc::propagate_on_container_swap if present, otherwise std::false_type
-  using propagate_on_container_swap =
-      memory_internal::ExtractOrT<memory_internal::GetPropagateOnContainerSwap,
-                                  Alloc, std::false_type>;
-
-  // is_always_equal:
-  // Alloc::is_always_equal if present, otherwise std::is_empty<Alloc>::type
-  using is_always_equal =
-      memory_internal::ExtractOrT<memory_internal::GetIsAlwaysEqual, Alloc,
-                                  typename std::is_empty<Alloc>::type>;
-
-  // rebind_alloc:
-  // Alloc::rebind<T>::other if present, otherwise Alloc<T, Args> if this Alloc
-  // is Alloc<U, Args>
-  template <typename T>
-  using rebind_alloc = typename memory_internal::RebindAlloc<Alloc, T>::type;
-
-  // rebind_traits:
-  // absl::allocator_traits<rebind_alloc<T>>
-  template <typename T>
-  using rebind_traits = absl::allocator_traits<rebind_alloc<T>>;
-
-  // allocate(Alloc& a, size_type n):
-  // Calls a.allocate(n)
-  static pointer allocate(Alloc& a,  // NOLINT(runtime/references)
-                          size_type n) {
-    return a.allocate(n);
-  }
-
-  // allocate(Alloc& a, size_type n, const_void_pointer hint):
-  // Calls a.allocate(n, hint) if possible.
-  // If not possible, calls a.allocate(n)
-  static pointer allocate(Alloc& a, size_type n,  // NOLINT(runtime/references)
-                          const_void_pointer hint) {
-    return allocate_impl(0, a, n, hint);
-  }
-
-  // deallocate(Alloc& a, pointer p, size_type n):
-  // Calls a.deallocate(p, n)
-  static void deallocate(Alloc& a, pointer p,  // NOLINT(runtime/references)
-                         size_type n) {
-    a.deallocate(p, n);
-  }
-
-  // construct(Alloc& a, T* p, Args&&... args):
-  // Calls a.construct(p, std::forward<Args>(args)...) if possible.
-  // If not possible, calls
-  //   ::new (static_cast<void*>(p)) T(std::forward<Args>(args)...)
-  template <typename T, typename... Args>
-  static void construct(Alloc& a, T* p,  // NOLINT(runtime/references)
-                        Args&&... args) {
-    construct_impl(0, a, p, std::forward<Args>(args)...);
-  }
-
-  // destroy(Alloc& a, T* p):
-  // Calls a.destroy(p) if possible. If not possible, calls p->~T().
-  template <typename T>
-  static void destroy(Alloc& a, T* p) {  // NOLINT(runtime/references)
-    destroy_impl(0, a, p);
-  }
-
-  // max_size(const Alloc& a):
-  // Returns a.max_size() if possible. If not possible, returns
-  //   std::numeric_limits<size_type>::max() / sizeof(value_type)
-  static size_type max_size(const Alloc& a) { return max_size_impl(0, a); }
-
-  // select_on_container_copy_construction(const Alloc& a):
-  // Returns a.select_on_container_copy_construction() if possible.
-  // If not possible, returns a.
-  static Alloc select_on_container_copy_construction(const Alloc& a) {
-    return select_on_container_copy_construction_impl(0, a);
-  }
-
- private:
-  template <typename A>
-  static auto allocate_impl(int, A& a,  // NOLINT(runtime/references)
-                            size_type n, const_void_pointer hint)
-      -> decltype(a.allocate(n, hint)) {
-    return a.allocate(n, hint);
-  }
-  static pointer allocate_impl(char, Alloc& a,  // NOLINT(runtime/references)
-                               size_type n, const_void_pointer) {
-    return a.allocate(n);
-  }
-
-  template <typename A, typename... Args>
-  static auto construct_impl(int, A& a,  // NOLINT(runtime/references)
-                             Args&&... args)
-      -> decltype(a.construct(std::forward<Args>(args)...)) {
-    a.construct(std::forward<Args>(args)...);
-  }
-
-  template <typename T, typename... Args>
-  static void construct_impl(char, Alloc&, T* p, Args&&... args) {
-    ::new (static_cast<void*>(p)) T(std::forward<Args>(args)...);
-  }
-
-  template <typename A, typename T>
-  static auto destroy_impl(int, A& a,  // NOLINT(runtime/references)
-                           T* p) -> decltype(a.destroy(p)) {
-    a.destroy(p);
-  }
-  template <typename T>
-  static void destroy_impl(char, Alloc&, T* p) {
-    p->~T();
-  }
-
-  template <typename A>
-  static auto max_size_impl(int, const A& a) -> decltype(a.max_size()) {
-    return a.max_size();
-  }
-  static size_type max_size_impl(char, const Alloc&) {
-    return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
-  }
-
-  template <typename A>
-  static auto select_on_container_copy_construction_impl(int, const A& a)
-      -> decltype(a.select_on_container_copy_construction()) {
-    return a.select_on_container_copy_construction();
-  }
-  static Alloc select_on_container_copy_construction_impl(char,
-                                                          const Alloc& a) {
-    return a;
-  }
-};
-#endif  // __cplusplus >= 201703L
-
-namespace memory_internal {
-
-// This template alias transforms Alloc::is_nothrow into a metafunction with
-// Alloc as a parameter so it can be used with ExtractOrT<>.
-template <typename Alloc>
-using GetIsNothrow = typename Alloc::is_nothrow;
-
-}  // namespace memory_internal
-
-// ABSL_ALLOCATOR_NOTHROW is a build time configuration macro for user to
-// specify whether the default allocation function can throw or never throws.
-// If the allocation function never throws, user should define it to a non-zero
-// value (e.g. via `-DABSL_ALLOCATOR_NOTHROW`).
-// If the allocation function can throw, user should leave it undefined or
-// define it to zero.
-//
-// allocator_is_nothrow<Alloc> is a traits class that derives from
-// Alloc::is_nothrow if present, otherwise std::false_type. It's specialized
-// for Alloc = std::allocator<T> for any type T according to the state of
-// ABSL_ALLOCATOR_NOTHROW.
-//
-// default_allocator_is_nothrow is a class that derives from std::true_type
-// when the default allocator (global operator new) never throws, and
-// std::false_type when it can throw. It is a convenience shorthand for writing
-// allocator_is_nothrow<std::allocator<T>> (T can be any type).
-// NOTE: allocator_is_nothrow<std::allocator<T>> is guaranteed to derive from
-// the same type for all T, because users should specialize neither
-// allocator_is_nothrow nor std::allocator.
-template <typename Alloc>
-struct allocator_is_nothrow
-    : memory_internal::ExtractOrT<memory_internal::GetIsNothrow, Alloc,
-                                  std::false_type> {};
-
-#if defined(ABSL_ALLOCATOR_NOTHROW) && ABSL_ALLOCATOR_NOTHROW
-template <typename T>
-struct allocator_is_nothrow<std::allocator<T>> : std::true_type {};
-struct default_allocator_is_nothrow : std::true_type {};
-#else
-struct default_allocator_is_nothrow : std::false_type {};
-#endif
-
-namespace memory_internal {
-template <typename Allocator, typename Iterator, typename... Args>
-void ConstructRange(Allocator& alloc, Iterator first, Iterator last,
-                    const Args&... args) {
-  for (Iterator cur = first; cur != last; ++cur) {
-    ABSL_INTERNAL_TRY {
-      std::allocator_traits<Allocator>::construct(alloc, std::addressof(*cur),
-                                                  args...);
-    }
-    ABSL_INTERNAL_CATCH_ANY {
-      while (cur != first) {
-        --cur;
-        std::allocator_traits<Allocator>::destroy(alloc, std::addressof(*cur));
-      }
-      ABSL_INTERNAL_RETHROW;
-    }
-  }
-}
-
-template <typename Allocator, typename Iterator, typename InputIterator>
-void CopyRange(Allocator& alloc, Iterator destination, InputIterator first,
-               InputIterator last) {
-  for (Iterator cur = destination; first != last;
-       static_cast<void>(++cur), static_cast<void>(++first)) {
-    ABSL_INTERNAL_TRY {
-      std::allocator_traits<Allocator>::construct(alloc, std::addressof(*cur),
-                                                  *first);
-    }
-    ABSL_INTERNAL_CATCH_ANY {
-      while (cur != destination) {
-        --cur;
-        std::allocator_traits<Allocator>::destroy(alloc, std::addressof(*cur));
-      }
-      ABSL_INTERNAL_RETHROW;
-    }
-  }
-}
-}  // namespace memory_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_MEMORY_MEMORY_H_
diff --git a/third_party/abseil/absl/memory/memory_exception_safety_test.cc b/third_party/abseil/absl/memory/memory_exception_safety_test.cc
deleted file mode 100644
index 1df7261..0000000
--- a/third_party/abseil/absl/memory/memory_exception_safety_test.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/memory/memory.h"
-
-#include "absl/base/config.h"
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/exception_safety_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-constexpr int kLength = 50;
-using Thrower = testing::ThrowingValue<testing::TypeSpec::kEverythingThrows>;
-
-TEST(MakeUnique, CheckForLeaks) {
-  constexpr int kValue = 321;
-  auto tester = testing::MakeExceptionSafetyTester()
-                    .WithInitialValue(Thrower(kValue))
-                    // Ensures make_unique does not modify the input. The real
-                    // test, though, is ConstructorTracker checking for leaks.
-                    .WithContracts(testing::strong_guarantee);
-
-  EXPECT_TRUE(tester.Test([](Thrower* thrower) {
-    static_cast<void>(absl::make_unique<Thrower>(*thrower));
-  }));
-
-  EXPECT_TRUE(tester.Test([](Thrower* thrower) {
-    static_cast<void>(absl::make_unique<Thrower>(std::move(*thrower)));
-  }));
-
-  // Test T[n] overload
-  EXPECT_TRUE(tester.Test([&](Thrower*) {
-    static_cast<void>(absl::make_unique<Thrower[]>(kLength));
-  }));
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HAVE_EXCEPTIONS
diff --git a/third_party/abseil/absl/memory/memory_test.cc b/third_party/abseil/absl/memory/memory_test.cc
deleted file mode 100644
index 1990c7b..0000000
--- a/third_party/abseil/absl/memory/memory_test.cc
+++ /dev/null
@@ -1,650 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Tests for pointer utilities.
-
-#include "absl/memory/memory.h"
-
-#include <sys/types.h>
-
-#include <cstddef>
-#include <memory>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::ElementsAre;
-using ::testing::Return;
-
-// This class creates observable behavior to verify that a destructor has
-// been called, via the instance_count variable.
-class DestructorVerifier {
- public:
-  DestructorVerifier() { ++instance_count_; }
-  DestructorVerifier(const DestructorVerifier&) = delete;
-  DestructorVerifier& operator=(const DestructorVerifier&) = delete;
-  ~DestructorVerifier() { --instance_count_; }
-
-  // The number of instances of this class currently active.
-  static int instance_count() { return instance_count_; }
-
- private:
-  // The number of instances of this class currently active.
-  static int instance_count_;
-};
-
-int DestructorVerifier::instance_count_ = 0;
-
-TEST(WrapUniqueTest, WrapUnique) {
-  // Test that the unique_ptr is constructed properly by verifying that the
-  // destructor for its payload gets called at the proper time.
-  {
-    auto dv = new DestructorVerifier;
-    EXPECT_EQ(1, DestructorVerifier::instance_count());
-    std::unique_ptr<DestructorVerifier> ptr = absl::WrapUnique(dv);
-    EXPECT_EQ(1, DestructorVerifier::instance_count());
-  }
-  EXPECT_EQ(0, DestructorVerifier::instance_count());
-}
-TEST(MakeUniqueTest, Basic) {
-  std::unique_ptr<std::string> p = absl::make_unique<std::string>();
-  EXPECT_EQ("", *p);
-  p = absl::make_unique<std::string>("hi");
-  EXPECT_EQ("hi", *p);
-}
-
-// InitializationVerifier fills in a pattern when allocated so we can
-// distinguish between its default and value initialized states (without
-// accessing truly uninitialized memory).
-struct InitializationVerifier {
-  static constexpr int kDefaultScalar = 0x43;
-  static constexpr int kDefaultArray = 0x4B;
-
-  static void* operator new(size_t n) {
-    void* ret = ::operator new(n);
-    memset(ret, kDefaultScalar, n);
-    return ret;
-  }
-
-  static void* operator new[](size_t n) {
-    void* ret = ::operator new[](n);
-    memset(ret, kDefaultArray, n);
-    return ret;
-  }
-
-  int a;
-  int b;
-};
-
-TEST(Initialization, MakeUnique) {
-  auto p = absl::make_unique<InitializationVerifier>();
-
-  EXPECT_EQ(0, p->a);
-  EXPECT_EQ(0, p->b);
-}
-
-TEST(Initialization, MakeUniqueArray) {
-  auto p = absl::make_unique<InitializationVerifier[]>(2);
-
-  EXPECT_EQ(0, p[0].a);
-  EXPECT_EQ(0, p[0].b);
-  EXPECT_EQ(0, p[1].a);
-  EXPECT_EQ(0, p[1].b);
-}
-
-struct MoveOnly {
-  MoveOnly() = default;
-  explicit MoveOnly(int i1) : ip1{new int{i1}} {}
-  MoveOnly(int i1, int i2) : ip1{new int{i1}}, ip2{new int{i2}} {}
-  std::unique_ptr<int> ip1;
-  std::unique_ptr<int> ip2;
-};
-
-struct AcceptMoveOnly {
-  explicit AcceptMoveOnly(MoveOnly m) : m_(std::move(m)) {}
-  MoveOnly m_;
-};
-
-TEST(MakeUniqueTest, MoveOnlyTypeAndValue) {
-  using ExpectedType = std::unique_ptr<MoveOnly>;
-  {
-    auto p = absl::make_unique<MoveOnly>();
-    static_assert(std::is_same<decltype(p), ExpectedType>::value,
-                  "unexpected return type");
-    EXPECT_TRUE(!p->ip1);
-    EXPECT_TRUE(!p->ip2);
-  }
-  {
-    auto p = absl::make_unique<MoveOnly>(1);
-    static_assert(std::is_same<decltype(p), ExpectedType>::value,
-                  "unexpected return type");
-    EXPECT_TRUE(p->ip1 && *p->ip1 == 1);
-    EXPECT_TRUE(!p->ip2);
-  }
-  {
-    auto p = absl::make_unique<MoveOnly>(1, 2);
-    static_assert(std::is_same<decltype(p), ExpectedType>::value,
-                  "unexpected return type");
-    EXPECT_TRUE(p->ip1 && *p->ip1 == 1);
-    EXPECT_TRUE(p->ip2 && *p->ip2 == 2);
-  }
-}
-
-TEST(MakeUniqueTest, AcceptMoveOnly) {
-  auto p = absl::make_unique<AcceptMoveOnly>(MoveOnly());
-  p = std::unique_ptr<AcceptMoveOnly>(new AcceptMoveOnly(MoveOnly()));
-}
-
-struct ArrayWatch {
-  void* operator new[](size_t n) {
-    allocs().push_back(n);
-    return ::operator new[](n);
-  }
-  void operator delete[](void* p) { return ::operator delete[](p); }
-  static std::vector<size_t>& allocs() {
-    static auto& v = *new std::vector<size_t>;
-    return v;
-  }
-};
-
-TEST(Make_UniqueTest, Array) {
-  // Ensure state is clean before we start so that these tests
-  // are order-agnostic.
-  ArrayWatch::allocs().clear();
-
-  auto p = absl::make_unique<ArrayWatch[]>(5);
-  static_assert(std::is_same<decltype(p), std::unique_ptr<ArrayWatch[]>>::value,
-                "unexpected return type");
-  EXPECT_THAT(ArrayWatch::allocs(), ElementsAre(5 * sizeof(ArrayWatch)));
-}
-
-TEST(Make_UniqueTest, NotAmbiguousWithStdMakeUnique) {
-  // Ensure that absl::make_unique is not ambiguous with std::make_unique.
-  // In C++14 mode, the below call to make_unique has both types as candidates.
-  struct TakesStdType {
-    explicit TakesStdType(const std::vector<int>& vec) {}
-  };
-  using absl::make_unique;
-  (void)make_unique<TakesStdType>(std::vector<int>());
-}
-
-#if 0
-// These tests shouldn't compile.
-TEST(MakeUniqueTestNC, AcceptMoveOnlyLvalue) {
-  auto m = MoveOnly();
-  auto p = absl::make_unique<AcceptMoveOnly>(m);
-}
-TEST(MakeUniqueTestNC, KnownBoundArray) {
-  auto p = absl::make_unique<ArrayWatch[5]>();
-}
-#endif
-
-TEST(RawPtrTest, RawPointer) {
-  int i = 5;
-  EXPECT_EQ(&i, absl::RawPtr(&i));
-}
-
-TEST(RawPtrTest, SmartPointer) {
-  int* o = new int(5);
-  std::unique_ptr<int> p(o);
-  EXPECT_EQ(o, absl::RawPtr(p));
-}
-
-class IntPointerNonConstDeref {
- public:
-  explicit IntPointerNonConstDeref(int* p) : p_(p) {}
-  friend bool operator!=(const IntPointerNonConstDeref& a, std::nullptr_t) {
-    return a.p_ != nullptr;
-  }
-  int& operator*() { return *p_; }
-
- private:
-  std::unique_ptr<int> p_;
-};
-
-TEST(RawPtrTest, SmartPointerNonConstDereference) {
-  int* o = new int(5);
-  IntPointerNonConstDeref p(o);
-  EXPECT_EQ(o, absl::RawPtr(p));
-}
-
-TEST(RawPtrTest, NullValuedRawPointer) {
-  int* p = nullptr;
-  EXPECT_EQ(nullptr, absl::RawPtr(p));
-}
-
-TEST(RawPtrTest, NullValuedSmartPointer) {
-  std::unique_ptr<int> p;
-  EXPECT_EQ(nullptr, absl::RawPtr(p));
-}
-
-TEST(RawPtrTest, Nullptr) {
-  auto p = absl::RawPtr(nullptr);
-  EXPECT_TRUE((std::is_same<std::nullptr_t, decltype(p)>::value));
-  EXPECT_EQ(nullptr, p);
-}
-
-TEST(RawPtrTest, Null) {
-  auto p = absl::RawPtr(nullptr);
-  EXPECT_TRUE((std::is_same<std::nullptr_t, decltype(p)>::value));
-  EXPECT_EQ(nullptr, p);
-}
-
-TEST(RawPtrTest, Zero) {
-  auto p = absl::RawPtr(nullptr);
-  EXPECT_TRUE((std::is_same<std::nullptr_t, decltype(p)>::value));
-  EXPECT_EQ(nullptr, p);
-}
-
-TEST(ShareUniquePtrTest, Share) {
-  auto up = absl::make_unique<int>();
-  int* rp = up.get();
-  auto sp = absl::ShareUniquePtr(std::move(up));
-  EXPECT_EQ(sp.get(), rp);
-}
-
-TEST(ShareUniquePtrTest, ShareNull) {
-  struct NeverDie {
-    using pointer = void*;
-    void operator()(pointer) {
-      ASSERT_TRUE(false) << "Deleter should not have been called.";
-    }
-  };
-
-  std::unique_ptr<void, NeverDie> up;
-  auto sp = absl::ShareUniquePtr(std::move(up));
-}
-
-TEST(WeakenPtrTest, Weak) {
-  auto sp = std::make_shared<int>();
-  auto wp = absl::WeakenPtr(sp);
-  EXPECT_EQ(sp.get(), wp.lock().get());
-  sp.reset();
-  EXPECT_TRUE(wp.expired());
-}
-
-// Should not compile.
-/*
-TEST(RawPtrTest, NotAPointer) {
-  absl::RawPtr(1.5);
-}
-*/
-
-template <typename T>
-struct SmartPointer {
-  using difference_type = char;
-};
-
-struct PointerWith {
-  using element_type = int32_t;
-  using difference_type = int16_t;
-  template <typename U>
-  using rebind = SmartPointer<U>;
-
-  static PointerWith pointer_to(
-      element_type& r) {  // NOLINT(runtime/references)
-    return PointerWith{&r};
-  }
-
-  element_type* ptr;
-};
-
-template <typename... Args>
-struct PointerWithout {};
-
-TEST(PointerTraits, Types) {
-  using TraitsWith = absl::pointer_traits<PointerWith>;
-  EXPECT_TRUE((std::is_same<TraitsWith::pointer, PointerWith>::value));
-  EXPECT_TRUE((std::is_same<TraitsWith::element_type, int32_t>::value));
-  EXPECT_TRUE((std::is_same<TraitsWith::difference_type, int16_t>::value));
-  EXPECT_TRUE((
-      std::is_same<TraitsWith::rebind<int64_t>, SmartPointer<int64_t>>::value));
-
-  using TraitsWithout = absl::pointer_traits<PointerWithout<double, int>>;
-  EXPECT_TRUE((std::is_same<TraitsWithout::pointer,
-                            PointerWithout<double, int>>::value));
-  EXPECT_TRUE((std::is_same<TraitsWithout::element_type, double>::value));
-  EXPECT_TRUE(
-      (std::is_same<TraitsWithout ::difference_type, std::ptrdiff_t>::value));
-  EXPECT_TRUE((std::is_same<TraitsWithout::rebind<int64_t>,
-                            PointerWithout<int64_t, int>>::value));
-
-  using TraitsRawPtr = absl::pointer_traits<char*>;
-  EXPECT_TRUE((std::is_same<TraitsRawPtr::pointer, char*>::value));
-  EXPECT_TRUE((std::is_same<TraitsRawPtr::element_type, char>::value));
-  EXPECT_TRUE(
-      (std::is_same<TraitsRawPtr::difference_type, std::ptrdiff_t>::value));
-  EXPECT_TRUE((std::is_same<TraitsRawPtr::rebind<int64_t>, int64_t*>::value));
-}
-
-TEST(PointerTraits, Functions) {
-  int i;
-  EXPECT_EQ(&i, absl::pointer_traits<PointerWith>::pointer_to(i).ptr);
-  EXPECT_EQ(&i, absl::pointer_traits<int*>::pointer_to(i));
-}
-
-TEST(AllocatorTraits, Typedefs) {
-  struct A {
-    struct value_type {};
-  };
-  EXPECT_TRUE((
-      std::is_same<A,
-                   typename absl::allocator_traits<A>::allocator_type>::value));
-  EXPECT_TRUE(
-      (std::is_same<A::value_type,
-                    typename absl::allocator_traits<A>::value_type>::value));
-
-  struct X {};
-  struct HasPointer {
-    using value_type = X;
-    using pointer = SmartPointer<X>;
-  };
-  EXPECT_TRUE((std::is_same<SmartPointer<X>, typename absl::allocator_traits<
-                                                 HasPointer>::pointer>::value));
-  EXPECT_TRUE(
-      (std::is_same<A::value_type*,
-                    typename absl::allocator_traits<A>::pointer>::value));
-
-  EXPECT_TRUE(
-      (std::is_same<
-          SmartPointer<const X>,
-          typename absl::allocator_traits<HasPointer>::const_pointer>::value));
-  EXPECT_TRUE(
-      (std::is_same<const A::value_type*,
-                    typename absl::allocator_traits<A>::const_pointer>::value));
-
-  struct HasVoidPointer {
-    using value_type = X;
-    struct void_pointer {};
-  };
-
-  EXPECT_TRUE((std::is_same<HasVoidPointer::void_pointer,
-                            typename absl::allocator_traits<
-                                HasVoidPointer>::void_pointer>::value));
-  EXPECT_TRUE(
-      (std::is_same<SmartPointer<void>, typename absl::allocator_traits<
-                                            HasPointer>::void_pointer>::value));
-
-  struct HasConstVoidPointer {
-    using value_type = X;
-    struct const_void_pointer {};
-  };
-
-  EXPECT_TRUE(
-      (std::is_same<HasConstVoidPointer::const_void_pointer,
-                    typename absl::allocator_traits<
-                        HasConstVoidPointer>::const_void_pointer>::value));
-  EXPECT_TRUE((std::is_same<SmartPointer<const void>,
-                            typename absl::allocator_traits<
-                                HasPointer>::const_void_pointer>::value));
-
-  struct HasDifferenceType {
-    using value_type = X;
-    using difference_type = int;
-  };
-  EXPECT_TRUE(
-      (std::is_same<int, typename absl::allocator_traits<
-                             HasDifferenceType>::difference_type>::value));
-  EXPECT_TRUE((std::is_same<char, typename absl::allocator_traits<
-                                      HasPointer>::difference_type>::value));
-
-  struct HasSizeType {
-    using value_type = X;
-    using size_type = unsigned int;
-  };
-  EXPECT_TRUE((std::is_same<unsigned int, typename absl::allocator_traits<
-                                              HasSizeType>::size_type>::value));
-  EXPECT_TRUE((std::is_same<unsigned char, typename absl::allocator_traits<
-                                               HasPointer>::size_type>::value));
-
-  struct HasPropagateOnCopy {
-    using value_type = X;
-    struct propagate_on_container_copy_assignment {};
-  };
-
-  EXPECT_TRUE(
-      (std::is_same<HasPropagateOnCopy::propagate_on_container_copy_assignment,
-                    typename absl::allocator_traits<HasPropagateOnCopy>::
-                        propagate_on_container_copy_assignment>::value));
-  EXPECT_TRUE(
-      (std::is_same<std::false_type,
-                    typename absl::allocator_traits<
-                        A>::propagate_on_container_copy_assignment>::value));
-
-  struct HasPropagateOnMove {
-    using value_type = X;
-    struct propagate_on_container_move_assignment {};
-  };
-
-  EXPECT_TRUE(
-      (std::is_same<HasPropagateOnMove::propagate_on_container_move_assignment,
-                    typename absl::allocator_traits<HasPropagateOnMove>::
-                        propagate_on_container_move_assignment>::value));
-  EXPECT_TRUE(
-      (std::is_same<std::false_type,
-                    typename absl::allocator_traits<
-                        A>::propagate_on_container_move_assignment>::value));
-
-  struct HasPropagateOnSwap {
-    using value_type = X;
-    struct propagate_on_container_swap {};
-  };
-
-  EXPECT_TRUE(
-      (std::is_same<HasPropagateOnSwap::propagate_on_container_swap,
-                    typename absl::allocator_traits<HasPropagateOnSwap>::
-                        propagate_on_container_swap>::value));
-  EXPECT_TRUE(
-      (std::is_same<std::false_type, typename absl::allocator_traits<A>::
-                                         propagate_on_container_swap>::value));
-
-  struct HasIsAlwaysEqual {
-    using value_type = X;
-    struct is_always_equal {};
-  };
-
-  EXPECT_TRUE((std::is_same<HasIsAlwaysEqual::is_always_equal,
-                            typename absl::allocator_traits<
-                                HasIsAlwaysEqual>::is_always_equal>::value));
-  EXPECT_TRUE((std::is_same<std::true_type, typename absl::allocator_traits<
-                                                A>::is_always_equal>::value));
-  struct NonEmpty {
-    using value_type = X;
-    int i;
-  };
-  EXPECT_TRUE(
-      (std::is_same<std::false_type,
-                    absl::allocator_traits<NonEmpty>::is_always_equal>::value));
-}
-
-template <typename T>
-struct AllocWithPrivateInheritance : private std::allocator<T> {
-  using value_type = T;
-};
-
-TEST(AllocatorTraits, RebindWithPrivateInheritance) {
-  // Regression test for some versions of gcc that do not like the sfinae we
-  // used in combination with private inheritance.
-  EXPECT_TRUE(
-      (std::is_same<AllocWithPrivateInheritance<int>,
-                    absl::allocator_traits<AllocWithPrivateInheritance<char>>::
-                        rebind_alloc<int>>::value));
-}
-
-template <typename T>
-struct Rebound {};
-
-struct AllocWithRebind {
-  using value_type = int;
-  template <typename T>
-  struct rebind {
-    using other = Rebound<T>;
-  };
-};
-
-template <typename T, typename U>
-struct AllocWithoutRebind {
-  using value_type = int;
-};
-
-TEST(AllocatorTraits, Rebind) {
-  EXPECT_TRUE(
-      (std::is_same<Rebound<int>,
-                    typename absl::allocator_traits<
-                        AllocWithRebind>::template rebind_alloc<int>>::value));
-  EXPECT_TRUE(
-      (std::is_same<absl::allocator_traits<Rebound<int>>,
-                    typename absl::allocator_traits<
-                        AllocWithRebind>::template rebind_traits<int>>::value));
-
-  EXPECT_TRUE(
-      (std::is_same<AllocWithoutRebind<double, char>,
-                    typename absl::allocator_traits<AllocWithoutRebind<
-                        int, char>>::template rebind_alloc<double>>::value));
-  EXPECT_TRUE(
-      (std::is_same<absl::allocator_traits<AllocWithoutRebind<double, char>>,
-                    typename absl::allocator_traits<AllocWithoutRebind<
-                        int, char>>::template rebind_traits<double>>::value));
-}
-
-struct TestValue {
-  TestValue() {}
-  explicit TestValue(int* trace) : trace(trace) { ++*trace; }
-  ~TestValue() {
-    if (trace) --*trace;
-  }
-  int* trace = nullptr;
-};
-
-struct MinimalMockAllocator {
-  MinimalMockAllocator() : value(0) {}
-  explicit MinimalMockAllocator(int value) : value(value) {}
-  MinimalMockAllocator(const MinimalMockAllocator& other)
-      : value(other.value) {}
-  using value_type = TestValue;
-  MOCK_METHOD(value_type*, allocate, (size_t));
-  MOCK_METHOD(void, deallocate, (value_type*, size_t));
-
-  int value;
-};
-
-TEST(AllocatorTraits, FunctionsMinimal) {
-  int trace = 0;
-  int hint;
-  TestValue x(&trace);
-  MinimalMockAllocator mock;
-  using Traits = absl::allocator_traits<MinimalMockAllocator>;
-  EXPECT_CALL(mock, allocate(7)).WillRepeatedly(Return(&x));
-  EXPECT_CALL(mock, deallocate(&x, 7));
-
-  EXPECT_EQ(&x, Traits::allocate(mock, 7));
-  static_cast<void>(Traits::allocate(mock, 7, static_cast<const void*>(&hint)));
-  EXPECT_EQ(&x, Traits::allocate(mock, 7, static_cast<const void*>(&hint)));
-  Traits::deallocate(mock, &x, 7);
-
-  EXPECT_EQ(1, trace);
-  Traits::construct(mock, &x, &trace);
-  EXPECT_EQ(2, trace);
-  Traits::destroy(mock, &x);
-  EXPECT_EQ(1, trace);
-
-  EXPECT_EQ(std::numeric_limits<size_t>::max() / sizeof(TestValue),
-            Traits::max_size(mock));
-
-  EXPECT_EQ(0, mock.value);
-  EXPECT_EQ(0, Traits::select_on_container_copy_construction(mock).value);
-}
-
-struct FullMockAllocator {
-  FullMockAllocator() : value(0) {}
-  explicit FullMockAllocator(int value) : value(value) {}
-  FullMockAllocator(const FullMockAllocator& other) : value(other.value) {}
-  using value_type = TestValue;
-  MOCK_METHOD(value_type*, allocate, (size_t));
-  MOCK_METHOD(value_type*, allocate, (size_t, const void*));
-  MOCK_METHOD(void, construct, (value_type*, int*));
-  MOCK_METHOD(void, destroy, (value_type*));
-  MOCK_METHOD(size_t, max_size, (),
-              (const));
-  MOCK_METHOD(FullMockAllocator, select_on_container_copy_construction, (),
-              (const));
-
-  int value;
-};
-
-TEST(AllocatorTraits, FunctionsFull) {
-  int trace = 0;
-  int hint;
-  TestValue x(&trace), y;
-  FullMockAllocator mock;
-  using Traits = absl::allocator_traits<FullMockAllocator>;
-  EXPECT_CALL(mock, allocate(7)).WillRepeatedly(Return(&x));
-  EXPECT_CALL(mock, allocate(13, &hint)).WillRepeatedly(Return(&y));
-  EXPECT_CALL(mock, construct(&x, &trace));
-  EXPECT_CALL(mock, destroy(&x));
-  EXPECT_CALL(mock, max_size()).WillRepeatedly(Return(17));
-  EXPECT_CALL(mock, select_on_container_copy_construction())
-      .WillRepeatedly(Return(FullMockAllocator(23)));
-
-  EXPECT_EQ(&x, Traits::allocate(mock, 7));
-  EXPECT_EQ(&y, Traits::allocate(mock, 13, static_cast<const void*>(&hint)));
-
-  EXPECT_EQ(1, trace);
-  Traits::construct(mock, &x, &trace);
-  EXPECT_EQ(1, trace);
-  Traits::destroy(mock, &x);
-  EXPECT_EQ(1, trace);
-
-  EXPECT_EQ(17, Traits::max_size(mock));
-
-  EXPECT_EQ(0, mock.value);
-  EXPECT_EQ(23, Traits::select_on_container_copy_construction(mock).value);
-}
-
-TEST(AllocatorNoThrowTest, DefaultAllocator) {
-#if defined(ABSL_ALLOCATOR_NOTHROW) && ABSL_ALLOCATOR_NOTHROW
-  EXPECT_TRUE(absl::default_allocator_is_nothrow::value);
-#else
-  EXPECT_FALSE(absl::default_allocator_is_nothrow::value);
-#endif
-}
-
-TEST(AllocatorNoThrowTest, StdAllocator) {
-#if defined(ABSL_ALLOCATOR_NOTHROW) && ABSL_ALLOCATOR_NOTHROW
-  EXPECT_TRUE(absl::allocator_is_nothrow<std::allocator<int>>::value);
-#else
-  EXPECT_FALSE(absl::allocator_is_nothrow<std::allocator<int>>::value);
-#endif
-}
-
-TEST(AllocatorNoThrowTest, CustomAllocator) {
-  struct NoThrowAllocator {
-    using is_nothrow = std::true_type;
-  };
-  struct CanThrowAllocator {
-    using is_nothrow = std::false_type;
-  };
-  struct UnspecifiedAllocator {};
-  EXPECT_TRUE(absl::allocator_is_nothrow<NoThrowAllocator>::value);
-  EXPECT_FALSE(absl::allocator_is_nothrow<CanThrowAllocator>::value);
-  EXPECT_FALSE(absl::allocator_is_nothrow<UnspecifiedAllocator>::value);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/meta/BUILD.bazel b/third_party/abseil/absl/meta/BUILD.bazel
deleted file mode 100644
index 5585fcc..0000000
--- a/third_party/abseil/absl/meta/BUILD.bazel
+++ /dev/null
@@ -1,48 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "type_traits",
-    hdrs = ["type_traits.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-    ],
-)
-
-cc_test(
-    name = "type_traits_test",
-    srcs = ["type_traits_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":type_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/meta/CMakeLists.txt b/third_party/abseil/absl/meta/CMakeLists.txt
deleted file mode 100644
index 672ead2..0000000
--- a/third_party/abseil/absl/meta/CMakeLists.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    type_traits
-  HDRS
-    "type_traits.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    type_traits_test
-  SRCS
-    "type_traits_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::type_traits
-    gmock_main
-)
-
-# component target
-absl_cc_library(
-  NAME
-    meta
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::type_traits
-  PUBLIC
-)
diff --git a/third_party/abseil/absl/meta/type_traits.h b/third_party/abseil/absl/meta/type_traits.h
deleted file mode 100644
index d5cb5f3..0000000
--- a/third_party/abseil/absl/meta/type_traits.h
+++ /dev/null
@@ -1,767 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// type_traits.h
-// -----------------------------------------------------------------------------
-//
-// This file contains C++11-compatible versions of standard <type_traits> API
-// functions for determining the characteristics of types. Such traits can
-// support type inference, classification, and transformation, as well as
-// make it easier to write templates based on generic type behavior.
-//
-// See https://en.cppreference.com/w/cpp/header/type_traits
-//
-// WARNING: use of many of the constructs in this header will count as "complex
-// template metaprogramming", so before proceeding, please carefully consider
-// https://google.github.io/styleguide/cppguide.html#Template_metaprogramming
-//
-// WARNING: using template metaprogramming to detect or depend on API
-// features is brittle and not guaranteed. Neither the standard library nor
-// Abseil provides any guarantee that APIs are stable in the face of template
-// metaprogramming. Use with caution.
-#ifndef ABSL_META_TYPE_TRAITS_H_
-#define ABSL_META_TYPE_TRAITS_H_
-
-#include <stddef.h>
-#include <functional>
-#include <type_traits>
-
-#include "absl/base/config.h"
-
-// MSVC constructibility traits do not detect destructor properties and so our
-// implementations should not use them as a source-of-truth.
-#if defined(_MSC_VER) && !defined(__clang__) && !defined(__GNUC__)
-#define ABSL_META_INTERNAL_STD_CONSTRUCTION_TRAITS_DONT_CHECK_DESTRUCTION 1
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Defined and documented later on in this file.
-template <typename T>
-struct is_trivially_destructible;
-
-// Defined and documented later on in this file.
-template <typename T>
-struct is_trivially_move_assignable;
-
-namespace type_traits_internal {
-
-// Silence MSVC warnings about the destructor being defined as deleted.
-#if defined(_MSC_VER) && !defined(__GNUC__)
-#pragma warning(push)
-#pragma warning(disable : 4624)
-#endif  // defined(_MSC_VER) && !defined(__GNUC__)
-
-template <class T>
-union SingleMemberUnion {
-  T t;
-};
-
-// Restore the state of the destructor warning that was silenced above.
-#if defined(_MSC_VER) && !defined(__GNUC__)
-#pragma warning(pop)
-#endif  // defined(_MSC_VER) && !defined(__GNUC__)
-
-template <class T>
-struct IsTriviallyMoveConstructibleObject
-    : std::integral_constant<
-          bool, std::is_move_constructible<
-                    type_traits_internal::SingleMemberUnion<T>>::value &&
-                    absl::is_trivially_destructible<T>::value> {};
-
-template <class T>
-struct IsTriviallyCopyConstructibleObject
-    : std::integral_constant<
-          bool, std::is_copy_constructible<
-                    type_traits_internal::SingleMemberUnion<T>>::value &&
-                    absl::is_trivially_destructible<T>::value> {};
-
-template <class T>
-struct IsTriviallyMoveAssignableReference : std::false_type {};
-
-template <class T>
-struct IsTriviallyMoveAssignableReference<T&>
-    : absl::is_trivially_move_assignable<T>::type {};
-
-template <class T>
-struct IsTriviallyMoveAssignableReference<T&&>
-    : absl::is_trivially_move_assignable<T>::type {};
-
-template <typename... Ts>
-struct VoidTImpl {
-  using type = void;
-};
-
-// This trick to retrieve a default alignment is necessary for our
-// implementation of aligned_storage_t to be consistent with any implementation
-// of std::aligned_storage.
-template <size_t Len, typename T = std::aligned_storage<Len>>
-struct default_alignment_of_aligned_storage;
-
-template <size_t Len, size_t Align>
-struct default_alignment_of_aligned_storage<Len,
-                                            std::aligned_storage<Len, Align>> {
-  static constexpr size_t value = Align;
-};
-
-////////////////////////////////
-// Library Fundamentals V2 TS //
-////////////////////////////////
-
-// NOTE: The `is_detected` family of templates here differ from the library
-// fundamentals specification in that for library fundamentals, `Op<Args...>` is
-// evaluated as soon as the type `is_detected<Op, Args...>` undergoes
-// substitution, regardless of whether or not the `::value` is accessed. That
-// is inconsistent with all other standard traits and prevents lazy evaluation
-// in larger contexts (such as if the `is_detected` check is a trailing argument
-// of a `conjunction`. This implementation opts to instead be lazy in the same
-// way that the standard traits are (this "defect" of the detection idiom
-// specifications has been reported).
-
-template <class Enabler, template <class...> class Op, class... Args>
-struct is_detected_impl {
-  using type = std::false_type;
-};
-
-template <template <class...> class Op, class... Args>
-struct is_detected_impl<typename VoidTImpl<Op<Args...>>::type, Op, Args...> {
-  using type = std::true_type;
-};
-
-template <template <class...> class Op, class... Args>
-struct is_detected : is_detected_impl<void, Op, Args...>::type {};
-
-template <class Enabler, class To, template <class...> class Op, class... Args>
-struct is_detected_convertible_impl {
-  using type = std::false_type;
-};
-
-template <class To, template <class...> class Op, class... Args>
-struct is_detected_convertible_impl<
-    typename std::enable_if<std::is_convertible<Op<Args...>, To>::value>::type,
-    To, Op, Args...> {
-  using type = std::true_type;
-};
-
-template <class To, template <class...> class Op, class... Args>
-struct is_detected_convertible
-    : is_detected_convertible_impl<void, To, Op, Args...>::type {};
-
-template <typename T>
-using IsCopyAssignableImpl =
-    decltype(std::declval<T&>() = std::declval<const T&>());
-
-template <typename T>
-using IsMoveAssignableImpl = decltype(std::declval<T&>() = std::declval<T&&>());
-
-}  // namespace type_traits_internal
-
-// MSVC 19.20 has a regression that causes our workarounds to fail, but their
-// std forms now appear to be compliant.
-#if defined(_MSC_VER) && !defined(__clang__) && (_MSC_VER >= 1920)
-
-template <typename T>
-using is_copy_assignable = std::is_copy_assignable<T>;
-
-template <typename T>
-using is_move_assignable = std::is_move_assignable<T>;
-
-#else
-
-template <typename T>
-struct is_copy_assignable : type_traits_internal::is_detected<
-                                type_traits_internal::IsCopyAssignableImpl, T> {
-};
-
-template <typename T>
-struct is_move_assignable : type_traits_internal::is_detected<
-                                type_traits_internal::IsMoveAssignableImpl, T> {
-};
-
-#endif
-
-// void_t()
-//
-// Ignores the type of any its arguments and returns `void`. In general, this
-// metafunction allows you to create a general case that maps to `void` while
-// allowing specializations that map to specific types.
-//
-// This metafunction is designed to be a drop-in replacement for the C++17
-// `std::void_t` metafunction.
-//
-// NOTE: `absl::void_t` does not use the standard-specified implementation so
-// that it can remain compatible with gcc < 5.1. This can introduce slightly
-// different behavior, such as when ordering partial specializations.
-template <typename... Ts>
-using void_t = typename type_traits_internal::VoidTImpl<Ts...>::type;
-
-// conjunction
-//
-// Performs a compile-time logical AND operation on the passed types (which
-// must have  `::value` members convertible to `bool`. Short-circuits if it
-// encounters any `false` members (and does not compare the `::value` members
-// of any remaining arguments).
-//
-// This metafunction is designed to be a drop-in replacement for the C++17
-// `std::conjunction` metafunction.
-template <typename... Ts>
-struct conjunction : std::true_type {};
-
-template <typename T, typename... Ts>
-struct conjunction<T, Ts...>
-    : std::conditional<T::value, conjunction<Ts...>, T>::type {};
-
-template <typename T>
-struct conjunction<T> : T {};
-
-// disjunction
-//
-// Performs a compile-time logical OR operation on the passed types (which
-// must have  `::value` members convertible to `bool`. Short-circuits if it
-// encounters any `true` members (and does not compare the `::value` members
-// of any remaining arguments).
-//
-// This metafunction is designed to be a drop-in replacement for the C++17
-// `std::disjunction` metafunction.
-template <typename... Ts>
-struct disjunction : std::false_type {};
-
-template <typename T, typename... Ts>
-struct disjunction<T, Ts...> :
-      std::conditional<T::value, T, disjunction<Ts...>>::type {};
-
-template <typename T>
-struct disjunction<T> : T {};
-
-// negation
-//
-// Performs a compile-time logical NOT operation on the passed type (which
-// must have  `::value` members convertible to `bool`.
-//
-// This metafunction is designed to be a drop-in replacement for the C++17
-// `std::negation` metafunction.
-template <typename T>
-struct negation : std::integral_constant<bool, !T::value> {};
-
-// is_function()
-//
-// Determines whether the passed type `T` is a function type.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_function()` metafunction for platforms that have incomplete C++11
-// support (such as libstdc++ 4.x).
-//
-// This metafunction works because appending `const` to a type does nothing to
-// function types and reference types (and forms a const-qualified type
-// otherwise).
-template <typename T>
-struct is_function
-    : std::integral_constant<
-          bool, !(std::is_reference<T>::value ||
-                  std::is_const<typename std::add_const<T>::type>::value)> {};
-
-// is_trivially_destructible()
-//
-// Determines whether the passed type `T` is trivially destructible.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_destructible()` metafunction for platforms that have
-// incomplete C++11 support (such as libstdc++ 4.x). On any platforms that do
-// fully support C++11, we check whether this yields the same result as the std
-// implementation.
-//
-// NOTE: the extensions (__has_trivial_xxx) are implemented in gcc (version >=
-// 4.3) and clang. Since we are supporting libstdc++ > 4.7, they should always
-// be present. These  extensions are documented at
-// https://gcc.gnu.org/onlinedocs/gcc/Type-Traits.html#Type-Traits.
-template <typename T>
-struct is_trivially_destructible
-    : std::integral_constant<bool, __has_trivial_destructor(T) &&
-                                   std::is_destructible<T>::value> {
-#ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
- private:
-  static constexpr bool compliant = std::is_trivially_destructible<T>::value ==
-                                    is_trivially_destructible::value;
-  static_assert(compliant || std::is_trivially_destructible<T>::value,
-                "Not compliant with std::is_trivially_destructible; "
-                "Standard: false, Implementation: true");
-  static_assert(compliant || !std::is_trivially_destructible<T>::value,
-                "Not compliant with std::is_trivially_destructible; "
-                "Standard: true, Implementation: false");
-#endif  // ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
-};
-
-// is_trivially_default_constructible()
-//
-// Determines whether the passed type `T` is trivially default constructible.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_default_constructible()` metafunction for platforms that
-// have incomplete C++11 support (such as libstdc++ 4.x). On any platforms that
-// do fully support C++11, we check whether this yields the same result as the
-// std implementation.
-//
-// NOTE: according to the C++ standard, Section: 20.15.4.3 [meta.unary.prop]
-// "The predicate condition for a template specialization is_constructible<T,
-// Args...> shall be satisfied if and only if the following variable
-// definition would be well-formed for some invented variable t:
-//
-// T t(declval<Args>()...);
-//
-// is_trivially_constructible<T, Args...> additionally requires that the
-// variable definition does not call any operation that is not trivial.
-// For the purposes of this check, the call to std::declval is considered
-// trivial."
-//
-// Notes from https://en.cppreference.com/w/cpp/types/is_constructible:
-// In many implementations, is_nothrow_constructible also checks if the
-// destructor throws because it is effectively noexcept(T(arg)). Same
-// applies to is_trivially_constructible, which, in these implementations, also
-// requires that the destructor is trivial.
-// GCC bug 51452: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51452
-// LWG issue 2116: http://cplusplus.github.io/LWG/lwg-active.html#2116.
-//
-// "T obj();" need to be well-formed and not call any nontrivial operation.
-// Nontrivially destructible types will cause the expression to be nontrivial.
-template <typename T>
-struct is_trivially_default_constructible
-    : std::integral_constant<bool, __has_trivial_constructor(T) &&
-                                   std::is_default_constructible<T>::value &&
-                                   is_trivially_destructible<T>::value> {
-#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE) && \
-    !defined(                                            \
-        ABSL_META_INTERNAL_STD_CONSTRUCTION_TRAITS_DONT_CHECK_DESTRUCTION)
- private:
-  static constexpr bool compliant =
-      std::is_trivially_default_constructible<T>::value ==
-      is_trivially_default_constructible::value;
-  static_assert(compliant || std::is_trivially_default_constructible<T>::value,
-                "Not compliant with std::is_trivially_default_constructible; "
-                "Standard: false, Implementation: true");
-  static_assert(compliant || !std::is_trivially_default_constructible<T>::value,
-                "Not compliant with std::is_trivially_default_constructible; "
-                "Standard: true, Implementation: false");
-#endif  // ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE
-};
-
-// is_trivially_move_constructible()
-//
-// Determines whether the passed type `T` is trivially move constructible.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_move_constructible()` metafunction for platforms that have
-// incomplete C++11 support (such as libstdc++ 4.x). On any platforms that do
-// fully support C++11, we check whether this yields the same result as the std
-// implementation.
-//
-// NOTE: `T obj(declval<T>());` needs to be well-formed and not call any
-// nontrivial operation.  Nontrivially destructible types will cause the
-// expression to be nontrivial.
-template <typename T>
-struct is_trivially_move_constructible
-    : std::conditional<
-          std::is_object<T>::value && !std::is_array<T>::value,
-          type_traits_internal::IsTriviallyMoveConstructibleObject<T>,
-          std::is_reference<T>>::type::type {
-#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE) && \
-    !defined(                                            \
-        ABSL_META_INTERNAL_STD_CONSTRUCTION_TRAITS_DONT_CHECK_DESTRUCTION)
- private:
-  static constexpr bool compliant =
-      std::is_trivially_move_constructible<T>::value ==
-      is_trivially_move_constructible::value;
-  static_assert(compliant || std::is_trivially_move_constructible<T>::value,
-                "Not compliant with std::is_trivially_move_constructible; "
-                "Standard: false, Implementation: true");
-  static_assert(compliant || !std::is_trivially_move_constructible<T>::value,
-                "Not compliant with std::is_trivially_move_constructible; "
-                "Standard: true, Implementation: false");
-#endif  // ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE
-};
-
-// is_trivially_copy_constructible()
-//
-// Determines whether the passed type `T` is trivially copy constructible.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_copy_constructible()` metafunction for platforms that have
-// incomplete C++11 support (such as libstdc++ 4.x). On any platforms that do
-// fully support C++11, we check whether this yields the same result as the std
-// implementation.
-//
-// NOTE: `T obj(declval<const T&>());` needs to be well-formed and not call any
-// nontrivial operation.  Nontrivially destructible types will cause the
-// expression to be nontrivial.
-template <typename T>
-struct is_trivially_copy_constructible
-    : std::conditional<
-          std::is_object<T>::value && !std::is_array<T>::value,
-          type_traits_internal::IsTriviallyCopyConstructibleObject<T>,
-          std::is_lvalue_reference<T>>::type::type {
-#if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE) && \
-    !defined(                                            \
-        ABSL_META_INTERNAL_STD_CONSTRUCTION_TRAITS_DONT_CHECK_DESTRUCTION)
- private:
-  static constexpr bool compliant =
-      std::is_trivially_copy_constructible<T>::value ==
-      is_trivially_copy_constructible::value;
-  static_assert(compliant || std::is_trivially_copy_constructible<T>::value,
-                "Not compliant with std::is_trivially_copy_constructible; "
-                "Standard: false, Implementation: true");
-  static_assert(compliant || !std::is_trivially_copy_constructible<T>::value,
-                "Not compliant with std::is_trivially_copy_constructible; "
-                "Standard: true, Implementation: false");
-#endif  // ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE
-};
-
-// is_trivially_move_assignable()
-//
-// Determines whether the passed type `T` is trivially move assignable.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_move_assignable()` metafunction for platforms that have
-// incomplete C++11 support (such as libstdc++ 4.x). On any platforms that do
-// fully support C++11, we check whether this yields the same result as the std
-// implementation.
-//
-// NOTE: `is_assignable<T, U>::value` is `true` if the expression
-// `declval<T>() = declval<U>()` is well-formed when treated as an unevaluated
-// operand. `is_trivially_assignable<T, U>` requires the assignment to call no
-// operation that is not trivial. `is_trivially_copy_assignable<T>` is simply
-// `is_trivially_assignable<T&, T>`.
-template <typename T>
-struct is_trivially_move_assignable
-    : std::conditional<
-          std::is_object<T>::value && !std::is_array<T>::value &&
-              std::is_move_assignable<T>::value,
-          std::is_move_assignable<type_traits_internal::SingleMemberUnion<T>>,
-          type_traits_internal::IsTriviallyMoveAssignableReference<T>>::type::
-          type {
-#ifdef ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
- private:
-  static constexpr bool compliant =
-      std::is_trivially_move_assignable<T>::value ==
-      is_trivially_move_assignable::value;
-  static_assert(compliant || std::is_trivially_move_assignable<T>::value,
-                "Not compliant with std::is_trivially_move_assignable; "
-                "Standard: false, Implementation: true");
-  static_assert(compliant || !std::is_trivially_move_assignable<T>::value,
-                "Not compliant with std::is_trivially_move_assignable; "
-                "Standard: true, Implementation: false");
-#endif  // ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
-};
-
-// is_trivially_copy_assignable()
-//
-// Determines whether the passed type `T` is trivially copy assignable.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_copy_assignable()` metafunction for platforms that have
-// incomplete C++11 support (such as libstdc++ 4.x). On any platforms that do
-// fully support C++11, we check whether this yields the same result as the std
-// implementation.
-//
-// NOTE: `is_assignable<T, U>::value` is `true` if the expression
-// `declval<T>() = declval<U>()` is well-formed when treated as an unevaluated
-// operand. `is_trivially_assignable<T, U>` requires the assignment to call no
-// operation that is not trivial. `is_trivially_copy_assignable<T>` is simply
-// `is_trivially_assignable<T&, const T&>`.
-template <typename T>
-struct is_trivially_copy_assignable
-    : std::integral_constant<
-          bool, __has_trivial_assign(typename std::remove_reference<T>::type) &&
-                    absl::is_copy_assignable<T>::value> {
-#ifdef ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
- private:
-  static constexpr bool compliant =
-      std::is_trivially_copy_assignable<T>::value ==
-      is_trivially_copy_assignable::value;
-  static_assert(compliant || std::is_trivially_copy_assignable<T>::value,
-                "Not compliant with std::is_trivially_copy_assignable; "
-                "Standard: false, Implementation: true");
-  static_assert(compliant || !std::is_trivially_copy_assignable<T>::value,
-                "Not compliant with std::is_trivially_copy_assignable; "
-                "Standard: true, Implementation: false");
-#endif  // ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
-};
-
-namespace type_traits_internal {
-// is_trivially_copyable()
-//
-// Determines whether the passed type `T` is trivially copyable.
-//
-// This metafunction is designed to be a drop-in replacement for the C++11
-// `std::is_trivially_copyable()` metafunction for platforms that have
-// incomplete C++11 support (such as libstdc++ 4.x). We use the C++17 definition
-// of TriviallyCopyable.
-//
-// NOTE: `is_trivially_copyable<T>::value` is `true` if all of T's copy/move
-// constructors/assignment operators are trivial or deleted, T has at least
-// one non-deleted copy/move constructor/assignment operator, and T is trivially
-// destructible. Arrays of trivially copyable types are trivially copyable.
-//
-// We expose this metafunction only for internal use within absl.
-template <typename T>
-class is_trivially_copyable_impl {
-  using ExtentsRemoved = typename std::remove_all_extents<T>::type;
-  static constexpr bool kIsCopyOrMoveConstructible =
-      std::is_copy_constructible<ExtentsRemoved>::value ||
-      std::is_move_constructible<ExtentsRemoved>::value;
-  static constexpr bool kIsCopyOrMoveAssignable =
-      absl::is_copy_assignable<ExtentsRemoved>::value ||
-      absl::is_move_assignable<ExtentsRemoved>::value;
-
- public:
-  static constexpr bool kValue =
-      (__has_trivial_copy(ExtentsRemoved) || !kIsCopyOrMoveConstructible) &&
-      (__has_trivial_assign(ExtentsRemoved) || !kIsCopyOrMoveAssignable) &&
-      (kIsCopyOrMoveConstructible || kIsCopyOrMoveAssignable) &&
-      is_trivially_destructible<ExtentsRemoved>::value &&
-      // We need to check for this explicitly because otherwise we'll say
-      // references are trivial copyable when compiled by MSVC.
-      !std::is_reference<ExtentsRemoved>::value;
-};
-
-template <typename T>
-struct is_trivially_copyable
-    : std::integral_constant<
-          bool, type_traits_internal::is_trivially_copyable_impl<T>::kValue> {};
-}  // namespace type_traits_internal
-
-// -----------------------------------------------------------------------------
-// C++14 "_t" trait aliases
-// -----------------------------------------------------------------------------
-
-template <typename T>
-using remove_cv_t = typename std::remove_cv<T>::type;
-
-template <typename T>
-using remove_const_t = typename std::remove_const<T>::type;
-
-template <typename T>
-using remove_volatile_t = typename std::remove_volatile<T>::type;
-
-template <typename T>
-using add_cv_t = typename std::add_cv<T>::type;
-
-template <typename T>
-using add_const_t = typename std::add_const<T>::type;
-
-template <typename T>
-using add_volatile_t = typename std::add_volatile<T>::type;
-
-template <typename T>
-using remove_reference_t = typename std::remove_reference<T>::type;
-
-template <typename T>
-using add_lvalue_reference_t = typename std::add_lvalue_reference<T>::type;
-
-template <typename T>
-using add_rvalue_reference_t = typename std::add_rvalue_reference<T>::type;
-
-template <typename T>
-using remove_pointer_t = typename std::remove_pointer<T>::type;
-
-template <typename T>
-using add_pointer_t = typename std::add_pointer<T>::type;
-
-template <typename T>
-using make_signed_t = typename std::make_signed<T>::type;
-
-template <typename T>
-using make_unsigned_t = typename std::make_unsigned<T>::type;
-
-template <typename T>
-using remove_extent_t = typename std::remove_extent<T>::type;
-
-template <typename T>
-using remove_all_extents_t = typename std::remove_all_extents<T>::type;
-
-template <size_t Len, size_t Align = type_traits_internal::
-                          default_alignment_of_aligned_storage<Len>::value>
-using aligned_storage_t = typename std::aligned_storage<Len, Align>::type;
-
-template <typename T>
-using decay_t = typename std::decay<T>::type;
-
-template <bool B, typename T = void>
-using enable_if_t = typename std::enable_if<B, T>::type;
-
-template <bool B, typename T, typename F>
-using conditional_t = typename std::conditional<B, T, F>::type;
-
-template <typename... T>
-using common_type_t = typename std::common_type<T...>::type;
-
-template <typename T>
-using underlying_type_t = typename std::underlying_type<T>::type;
-
-
-namespace type_traits_internal {
-
-#if __cplusplus >= 201703L
-// std::result_of is deprecated (C++17) or removed (C++20)
-template<typename> struct result_of;
-template<typename F, typename... Args>
-struct result_of<F(Args...)> : std::invoke_result<F, Args...> {};
-#else
-template<typename F> using result_of = std::result_of<F>;
-#endif
-
-}  // namespace type_traits_internal
-
-template<typename F>
-using result_of_t = typename type_traits_internal::result_of<F>::type;
-
-namespace type_traits_internal {
-// In MSVC we can't probe std::hash or stdext::hash because it triggers a
-// static_assert instead of failing substitution. Libc++ prior to 4.0
-// also used a static_assert.
-//
-#if defined(_MSC_VER) || (defined(_LIBCPP_VERSION) && \
-                          _LIBCPP_VERSION < 4000 && _LIBCPP_STD_VER > 11)
-#define ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_ 0
-#else
-#define ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_ 1
-#endif
-
-#if !ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-template <typename Key, typename = size_t>
-struct IsHashable : std::true_type {};
-#else   // ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-template <typename Key, typename = void>
-struct IsHashable : std::false_type {};
-
-template <typename Key>
-struct IsHashable<
-    Key,
-    absl::enable_if_t<std::is_convertible<
-        decltype(std::declval<std::hash<Key>&>()(std::declval<Key const&>())),
-        std::size_t>::value>> : std::true_type {};
-#endif  // !ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-
-struct AssertHashEnabledHelper {
- private:
-  static void Sink(...) {}
-  struct NAT {};
-
-  template <class Key>
-  static auto GetReturnType(int)
-      -> decltype(std::declval<std::hash<Key>>()(std::declval<Key const&>()));
-  template <class Key>
-  static NAT GetReturnType(...);
-
-  template <class Key>
-  static std::nullptr_t DoIt() {
-    static_assert(IsHashable<Key>::value,
-                  "std::hash<Key> does not provide a call operator");
-    static_assert(
-        std::is_default_constructible<std::hash<Key>>::value,
-        "std::hash<Key> must be default constructible when it is enabled");
-    static_assert(
-        std::is_copy_constructible<std::hash<Key>>::value,
-        "std::hash<Key> must be copy constructible when it is enabled");
-    static_assert(absl::is_copy_assignable<std::hash<Key>>::value,
-                  "std::hash<Key> must be copy assignable when it is enabled");
-    // is_destructible is unchecked as it's implied by each of the
-    // is_constructible checks.
-    using ReturnType = decltype(GetReturnType<Key>(0));
-    static_assert(std::is_same<ReturnType, NAT>::value ||
-                      std::is_same<ReturnType, size_t>::value,
-                  "std::hash<Key> must return size_t");
-    return nullptr;
-  }
-
-  template <class... Ts>
-  friend void AssertHashEnabled();
-};
-
-template <class... Ts>
-inline void AssertHashEnabled() {
-  using Helper = AssertHashEnabledHelper;
-  Helper::Sink(Helper::DoIt<Ts>()...);
-}
-
-}  // namespace type_traits_internal
-
-// An internal namespace that is required to implement the C++17 swap traits.
-// It is not further nested in type_traits_internal to avoid long symbol names.
-namespace swap_internal {
-
-// Necessary for the traits.
-using std::swap;
-
-// This declaration prevents global `swap` and `absl::swap` overloads from being
-// considered unless ADL picks them up.
-void swap();
-
-template <class T>
-using IsSwappableImpl = decltype(swap(std::declval<T&>(), std::declval<T&>()));
-
-// NOTE: This dance with the default template parameter is for MSVC.
-template <class T,
-          class IsNoexcept = std::integral_constant<
-              bool, noexcept(swap(std::declval<T&>(), std::declval<T&>()))>>
-using IsNothrowSwappableImpl = typename std::enable_if<IsNoexcept::value>::type;
-
-// IsSwappable
-//
-// Determines whether the standard swap idiom is a valid expression for
-// arguments of type `T`.
-template <class T>
-struct IsSwappable
-    : absl::type_traits_internal::is_detected<IsSwappableImpl, T> {};
-
-// IsNothrowSwappable
-//
-// Determines whether the standard swap idiom is a valid expression for
-// arguments of type `T` and is noexcept.
-template <class T>
-struct IsNothrowSwappable
-    : absl::type_traits_internal::is_detected<IsNothrowSwappableImpl, T> {};
-
-// Swap()
-//
-// Performs the swap idiom from a namespace where valid candidates may only be
-// found in `std` or via ADL.
-template <class T, absl::enable_if_t<IsSwappable<T>::value, int> = 0>
-void Swap(T& lhs, T& rhs) noexcept(IsNothrowSwappable<T>::value) {
-  swap(lhs, rhs);
-}
-
-// StdSwapIsUnconstrained
-//
-// Some standard library implementations are broken in that they do not
-// constrain `std::swap`. This will effectively tell us if we are dealing with
-// one of those implementations.
-using StdSwapIsUnconstrained = IsSwappable<void()>;
-
-}  // namespace swap_internal
-
-namespace type_traits_internal {
-
-// Make the swap-related traits/function accessible from this namespace.
-using swap_internal::IsNothrowSwappable;
-using swap_internal::IsSwappable;
-using swap_internal::Swap;
-using swap_internal::StdSwapIsUnconstrained;
-
-}  // namespace type_traits_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_META_TYPE_TRAITS_H_
diff --git a/third_party/abseil/absl/meta/type_traits_test.cc b/third_party/abseil/absl/meta/type_traits_test.cc
deleted file mode 100644
index 1aafd0d..0000000
--- a/third_party/abseil/absl/meta/type_traits_test.cc
+++ /dev/null
@@ -1,1368 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/meta/type_traits.h"
-
-#include <cstdint>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::StaticAssertTypeEq;
-
-template <class T, class U>
-struct simple_pair {
-  T first;
-  U second;
-};
-
-struct Dummy {};
-
-struct ReturnType {};
-struct ConvertibleToReturnType {
-  operator ReturnType() const;  // NOLINT
-};
-
-// Unique types used as parameter types for testing the detection idiom.
-struct StructA {};
-struct StructB {};
-struct StructC {};
-
-struct TypeWithBarFunction {
-  template <class T,
-            absl::enable_if_t<std::is_same<T&&, StructA&>::value, int> = 0>
-  ReturnType bar(T&&, const StructB&, StructC&&) &&;  // NOLINT
-};
-
-struct TypeWithBarFunctionAndConvertibleReturnType {
-  template <class T,
-            absl::enable_if_t<std::is_same<T&&, StructA&>::value, int> = 0>
-  ConvertibleToReturnType bar(T&&, const StructB&, StructC&&) &&;  // NOLINT
-};
-
-template <class Class, class... Ts>
-using BarIsCallableImpl =
-    decltype(std::declval<Class>().bar(std::declval<Ts>()...));
-
-template <class Class, class... T>
-using BarIsCallable =
-    absl::type_traits_internal::is_detected<BarIsCallableImpl, Class, T...>;
-
-template <class Class, class... T>
-using BarIsCallableConv = absl::type_traits_internal::is_detected_convertible<
-    ReturnType, BarIsCallableImpl, Class, T...>;
-
-// NOTE: Test of detail type_traits_internal::is_detected.
-TEST(IsDetectedTest, BasicUsage) {
-  EXPECT_TRUE((BarIsCallable<TypeWithBarFunction, StructA&, const StructB&,
-                             StructC>::value));
-  EXPECT_TRUE(
-      (BarIsCallable<TypeWithBarFunction, StructA&, StructB&, StructC>::value));
-  EXPECT_TRUE(
-      (BarIsCallable<TypeWithBarFunction, StructA&, StructB, StructC>::value));
-
-  EXPECT_FALSE((BarIsCallable<int, StructA&, const StructB&, StructC>::value));
-  EXPECT_FALSE((BarIsCallable<TypeWithBarFunction&, StructA&, const StructB&,
-                              StructC>::value));
-  EXPECT_FALSE((BarIsCallable<TypeWithBarFunction, StructA, const StructB&,
-                              StructC>::value));
-}
-
-// NOTE: Test of detail type_traits_internal::is_detected_convertible.
-TEST(IsDetectedConvertibleTest, BasicUsage) {
-  EXPECT_TRUE((BarIsCallableConv<TypeWithBarFunction, StructA&, const StructB&,
-                                 StructC>::value));
-  EXPECT_TRUE((BarIsCallableConv<TypeWithBarFunction, StructA&, StructB&,
-                                 StructC>::value));
-  EXPECT_TRUE((BarIsCallableConv<TypeWithBarFunction, StructA&, StructB,
-                                 StructC>::value));
-  EXPECT_TRUE((BarIsCallableConv<TypeWithBarFunctionAndConvertibleReturnType,
-                                 StructA&, const StructB&, StructC>::value));
-  EXPECT_TRUE((BarIsCallableConv<TypeWithBarFunctionAndConvertibleReturnType,
-                                 StructA&, StructB&, StructC>::value));
-  EXPECT_TRUE((BarIsCallableConv<TypeWithBarFunctionAndConvertibleReturnType,
-                                 StructA&, StructB, StructC>::value));
-
-  EXPECT_FALSE(
-      (BarIsCallableConv<int, StructA&, const StructB&, StructC>::value));
-  EXPECT_FALSE((BarIsCallableConv<TypeWithBarFunction&, StructA&,
-                                  const StructB&, StructC>::value));
-  EXPECT_FALSE((BarIsCallableConv<TypeWithBarFunction, StructA, const StructB&,
-                                  StructC>::value));
-  EXPECT_FALSE((BarIsCallableConv<TypeWithBarFunctionAndConvertibleReturnType&,
-                                  StructA&, const StructB&, StructC>::value));
-  EXPECT_FALSE((BarIsCallableConv<TypeWithBarFunctionAndConvertibleReturnType,
-                                  StructA, const StructB&, StructC>::value));
-}
-
-TEST(VoidTTest, BasicUsage) {
-  StaticAssertTypeEq<void, absl::void_t<Dummy>>();
-  StaticAssertTypeEq<void, absl::void_t<Dummy, Dummy, Dummy>>();
-}
-
-TEST(ConjunctionTest, BasicBooleanLogic) {
-  EXPECT_TRUE(absl::conjunction<>::value);
-  EXPECT_TRUE(absl::conjunction<std::true_type>::value);
-  EXPECT_TRUE((absl::conjunction<std::true_type, std::true_type>::value));
-  EXPECT_FALSE((absl::conjunction<std::true_type, std::false_type>::value));
-  EXPECT_FALSE((absl::conjunction<std::false_type, std::true_type>::value));
-  EXPECT_FALSE((absl::conjunction<std::false_type, std::false_type>::value));
-}
-
-struct MyTrueType {
-  static constexpr bool value = true;
-};
-
-struct MyFalseType {
-  static constexpr bool value = false;
-};
-
-TEST(ConjunctionTest, ShortCircuiting) {
-  EXPECT_FALSE(
-      (absl::conjunction<std::true_type, std::false_type, Dummy>::value));
-  EXPECT_TRUE((std::is_base_of<MyFalseType,
-                               absl::conjunction<std::true_type, MyFalseType,
-                                                 std::false_type>>::value));
-  EXPECT_TRUE(
-      (std::is_base_of<MyTrueType,
-                       absl::conjunction<std::true_type, MyTrueType>>::value));
-}
-
-TEST(DisjunctionTest, BasicBooleanLogic) {
-  EXPECT_FALSE(absl::disjunction<>::value);
-  EXPECT_FALSE(absl::disjunction<std::false_type>::value);
-  EXPECT_TRUE((absl::disjunction<std::true_type, std::true_type>::value));
-  EXPECT_TRUE((absl::disjunction<std::true_type, std::false_type>::value));
-  EXPECT_TRUE((absl::disjunction<std::false_type, std::true_type>::value));
-  EXPECT_FALSE((absl::disjunction<std::false_type, std::false_type>::value));
-}
-
-TEST(DisjunctionTest, ShortCircuiting) {
-  EXPECT_TRUE(
-      (absl::disjunction<std::false_type, std::true_type, Dummy>::value));
-  EXPECT_TRUE((
-      std::is_base_of<MyTrueType, absl::disjunction<std::false_type, MyTrueType,
-                                                    std::true_type>>::value));
-  EXPECT_TRUE((
-      std::is_base_of<MyFalseType,
-                      absl::disjunction<std::false_type, MyFalseType>>::value));
-}
-
-TEST(NegationTest, BasicBooleanLogic) {
-  EXPECT_FALSE(absl::negation<std::true_type>::value);
-  EXPECT_FALSE(absl::negation<MyTrueType>::value);
-  EXPECT_TRUE(absl::negation<std::false_type>::value);
-  EXPECT_TRUE(absl::negation<MyFalseType>::value);
-}
-
-// all member functions are trivial
-class Trivial {
-  int n_;
-};
-
-struct TrivialDestructor {
-  ~TrivialDestructor() = default;
-};
-
-struct NontrivialDestructor {
-  ~NontrivialDestructor() {}
-};
-
-struct DeletedDestructor {
-  ~DeletedDestructor() = delete;
-};
-
-class TrivialDefaultCtor {
- public:
-  TrivialDefaultCtor() = default;
-  explicit TrivialDefaultCtor(int n) : n_(n) {}
-
- private:
-  int n_;
-};
-
-class NontrivialDefaultCtor {
- public:
-  NontrivialDefaultCtor() : n_(1) {}
-
- private:
-  int n_;
-};
-
-class DeletedDefaultCtor {
- public:
-  DeletedDefaultCtor() = delete;
-  explicit DeletedDefaultCtor(int n) : n_(n) {}
-
- private:
-  int n_;
-};
-
-class TrivialMoveCtor {
- public:
-  explicit TrivialMoveCtor(int n) : n_(n) {}
-  TrivialMoveCtor(TrivialMoveCtor&&) = default;
-  TrivialMoveCtor& operator=(const TrivialMoveCtor& t) {
-    n_ = t.n_;
-    return *this;
-  }
-
- private:
-  int n_;
-};
-
-class NontrivialMoveCtor {
- public:
-  explicit NontrivialMoveCtor(int n) : n_(n) {}
-  NontrivialMoveCtor(NontrivialMoveCtor&& t) noexcept : n_(t.n_) {}
-  NontrivialMoveCtor& operator=(const NontrivialMoveCtor&) = default;
-
- private:
-  int n_;
-};
-
-class TrivialCopyCtor {
- public:
-  explicit TrivialCopyCtor(int n) : n_(n) {}
-  TrivialCopyCtor(const TrivialCopyCtor&) = default;
-  TrivialCopyCtor& operator=(const TrivialCopyCtor& t) {
-    n_ = t.n_;
-    return *this;
-  }
-
- private:
-  int n_;
-};
-
-class NontrivialCopyCtor {
- public:
-  explicit NontrivialCopyCtor(int n) : n_(n) {}
-  NontrivialCopyCtor(const NontrivialCopyCtor& t) : n_(t.n_) {}
-  NontrivialCopyCtor& operator=(const NontrivialCopyCtor&) = default;
-
- private:
-  int n_;
-};
-
-class DeletedCopyCtor {
- public:
-  explicit DeletedCopyCtor(int n) : n_(n) {}
-  DeletedCopyCtor(const DeletedCopyCtor&) = delete;
-  DeletedCopyCtor& operator=(const DeletedCopyCtor&) = default;
-
- private:
-  int n_;
-};
-
-class TrivialMoveAssign {
- public:
-  explicit TrivialMoveAssign(int n) : n_(n) {}
-  TrivialMoveAssign(const TrivialMoveAssign& t) : n_(t.n_) {}
-  TrivialMoveAssign& operator=(TrivialMoveAssign&&) = default;
-  ~TrivialMoveAssign() {}  // can have nontrivial destructor
- private:
-  int n_;
-};
-
-class NontrivialMoveAssign {
- public:
-  explicit NontrivialMoveAssign(int n) : n_(n) {}
-  NontrivialMoveAssign(const NontrivialMoveAssign&) = default;
-  NontrivialMoveAssign& operator=(NontrivialMoveAssign&& t) noexcept {
-    n_ = t.n_;
-    return *this;
-  }
-
- private:
-  int n_;
-};
-
-class TrivialCopyAssign {
- public:
-  explicit TrivialCopyAssign(int n) : n_(n) {}
-  TrivialCopyAssign(const TrivialCopyAssign& t) : n_(t.n_) {}
-  TrivialCopyAssign& operator=(const TrivialCopyAssign& t) = default;
-  ~TrivialCopyAssign() {}  // can have nontrivial destructor
- private:
-  int n_;
-};
-
-class NontrivialCopyAssign {
- public:
-  explicit NontrivialCopyAssign(int n) : n_(n) {}
-  NontrivialCopyAssign(const NontrivialCopyAssign&) = default;
-  NontrivialCopyAssign& operator=(const NontrivialCopyAssign& t) {
-    n_ = t.n_;
-    return *this;
-  }
-
- private:
-  int n_;
-};
-
-class DeletedCopyAssign {
- public:
-  explicit DeletedCopyAssign(int n) : n_(n) {}
-  DeletedCopyAssign(const DeletedCopyAssign&) = default;
-  DeletedCopyAssign& operator=(const DeletedCopyAssign&) = delete;
-
- private:
-  int n_;
-};
-
-struct MovableNonCopyable {
-  MovableNonCopyable() = default;
-  MovableNonCopyable(const MovableNonCopyable&) = delete;
-  MovableNonCopyable(MovableNonCopyable&&) = default;
-  MovableNonCopyable& operator=(const MovableNonCopyable&) = delete;
-  MovableNonCopyable& operator=(MovableNonCopyable&&) = default;
-};
-
-struct NonCopyableOrMovable {
-  NonCopyableOrMovable() = default;
-  NonCopyableOrMovable(const NonCopyableOrMovable&) = delete;
-  NonCopyableOrMovable(NonCopyableOrMovable&&) = delete;
-  NonCopyableOrMovable& operator=(const NonCopyableOrMovable&) = delete;
-  NonCopyableOrMovable& operator=(NonCopyableOrMovable&&) = delete;
-};
-
-class Base {
- public:
-  virtual ~Base() {}
-};
-
-// Old versions of libc++, around Clang 3.5 to 3.6, consider deleted destructors
-// as also being trivial. With the resolution of CWG 1928 and CWG 1734, this
-// is no longer considered true and has thus been amended.
-// Compiler Explorer: https://godbolt.org/g/zT59ZL
-// CWG issue 1734: http://open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#1734
-// CWG issue 1928: http://open-std.org/JTC1/SC22/WG21/docs/cwg_closed.html#1928
-#if !defined(_LIBCPP_VERSION) || _LIBCPP_VERSION >= 3700
-#define ABSL_TRIVIALLY_DESTRUCTIBLE_CONSIDER_DELETED_DESTRUCTOR_NOT_TRIVIAL 1
-#endif
-
-// As of the moment, GCC versions >5.1 have a problem compiling for
-// std::is_trivially_default_constructible<NontrivialDestructor[10]>, where
-// NontrivialDestructor is a struct with a custom nontrivial destructor. Note
-// that this problem only occurs for arrays of a known size, so something like
-// std::is_trivially_default_constructible<NontrivialDestructor[]> does not
-// have any problems.
-// Compiler Explorer: https://godbolt.org/g/dXRbdK
-// GCC bug 83689: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83689
-#if defined(__clang__) || defined(_MSC_VER) || \
-    (defined(__GNUC__) && __GNUC__ < 5)
-#define ABSL_GCC_BUG_TRIVIALLY_CONSTRUCTIBLE_ON_ARRAY_OF_NONTRIVIAL 1
-#endif
-
-TEST(TypeTraitsTest, TestIsFunction) {
-  struct Callable {
-    void operator()() {}
-  };
-  EXPECT_TRUE(absl::is_function<void()>::value);
-  EXPECT_TRUE(absl::is_function<void()&>::value);
-  EXPECT_TRUE(absl::is_function<void() const>::value);
-  EXPECT_TRUE(absl::is_function<void() noexcept>::value);
-  EXPECT_TRUE(absl::is_function<void(...) noexcept>::value);
-
-  EXPECT_FALSE(absl::is_function<void(*)()>::value);
-  EXPECT_FALSE(absl::is_function<void(&)()>::value);
-  EXPECT_FALSE(absl::is_function<int>::value);
-  EXPECT_FALSE(absl::is_function<Callable>::value);
-}
-
-TEST(TypeTraitsTest, TestTrivialDestructor) {
-  // Verify that arithmetic types and pointers have trivial destructors.
-  EXPECT_TRUE(absl::is_trivially_destructible<bool>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<char>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<unsigned char>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<signed char>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<wchar_t>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<int>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<unsigned int>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<int16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<uint16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<int64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<uint64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<float>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<double>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<long double>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<const std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<const Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<std::string**>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<Trivial**>::value);
-
-  // classes with destructors
-  EXPECT_TRUE(absl::is_trivially_destructible<Trivial>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<TrivialDestructor>::value);
-
-  // Verify that types with a nontrivial or deleted destructor
-  // are marked as such.
-  EXPECT_FALSE(absl::is_trivially_destructible<NontrivialDestructor>::value);
-#ifdef ABSL_TRIVIALLY_DESTRUCTIBLE_CONSIDER_DELETED_DESTRUCTOR_NOT_TRIVIAL
-  EXPECT_FALSE(absl::is_trivially_destructible<DeletedDestructor>::value);
-#endif
-
-  // simple_pair of such types is trivial
-  EXPECT_TRUE((absl::is_trivially_destructible<simple_pair<int, int>>::value));
-  EXPECT_TRUE((absl::is_trivially_destructible<
-               simple_pair<Trivial, TrivialDestructor>>::value));
-
-  // Verify that types without trivial destructors are correctly marked as such.
-  EXPECT_FALSE(absl::is_trivially_destructible<std::string>::value);
-  EXPECT_FALSE(absl::is_trivially_destructible<std::vector<int>>::value);
-
-  // Verify that simple_pairs of types without trivial destructors
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::is_trivially_destructible<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::is_trivially_destructible<
-                simple_pair<std::string, int>>::value));
-
-  // array of such types is trivial
-  using int10 = int[10];
-  EXPECT_TRUE(absl::is_trivially_destructible<int10>::value);
-  using Trivial10 = Trivial[10];
-  EXPECT_TRUE(absl::is_trivially_destructible<Trivial10>::value);
-  using TrivialDestructor10 = TrivialDestructor[10];
-  EXPECT_TRUE(absl::is_trivially_destructible<TrivialDestructor10>::value);
-
-  // Conversely, the opposite also holds.
-  using NontrivialDestructor10 = NontrivialDestructor[10];
-  EXPECT_FALSE(absl::is_trivially_destructible<NontrivialDestructor10>::value);
-}
-
-TEST(TypeTraitsTest, TestTrivialDefaultCtor) {
-  // arithmetic types and pointers have trivial default constructors.
-  EXPECT_TRUE(absl::is_trivially_default_constructible<bool>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<char>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<unsigned char>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<signed char>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<wchar_t>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<int>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<unsigned int>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<int16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<uint16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<int64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<uint64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<float>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<double>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<long double>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<Trivial*>::value);
-  EXPECT_TRUE(
-      absl::is_trivially_default_constructible<const std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<const Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<std::string**>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<Trivial**>::value);
-
-  // types with compiler generated default ctors
-  EXPECT_TRUE(absl::is_trivially_default_constructible<Trivial>::value);
-  EXPECT_TRUE(
-      absl::is_trivially_default_constructible<TrivialDefaultCtor>::value);
-
-  // Verify that types without them are not.
-  EXPECT_FALSE(
-      absl::is_trivially_default_constructible<NontrivialDefaultCtor>::value);
-  EXPECT_FALSE(
-      absl::is_trivially_default_constructible<DeletedDefaultCtor>::value);
-
-  // types with nontrivial destructor are nontrivial
-  EXPECT_FALSE(
-      absl::is_trivially_default_constructible<NontrivialDestructor>::value);
-
-  // types with vtables
-  EXPECT_FALSE(absl::is_trivially_default_constructible<Base>::value);
-
-  // Verify that simple_pair has trivial constructors where applicable.
-  EXPECT_TRUE((absl::is_trivially_default_constructible<
-               simple_pair<int, char*>>::value));
-  EXPECT_TRUE((absl::is_trivially_default_constructible<
-               simple_pair<int, Trivial>>::value));
-  EXPECT_TRUE((absl::is_trivially_default_constructible<
-               simple_pair<int, TrivialDefaultCtor>>::value));
-
-  // Verify that types without trivial constructors are
-  // correctly marked as such.
-  EXPECT_FALSE(absl::is_trivially_default_constructible<std::string>::value);
-  EXPECT_FALSE(
-      absl::is_trivially_default_constructible<std::vector<int>>::value);
-
-  // Verify that simple_pairs of types without trivial constructors
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::is_trivially_default_constructible<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::is_trivially_default_constructible<
-                simple_pair<std::string, int>>::value));
-
-  // Verify that arrays of such types are trivially default constructible
-  using int10 = int[10];
-  EXPECT_TRUE(absl::is_trivially_default_constructible<int10>::value);
-  using Trivial10 = Trivial[10];
-  EXPECT_TRUE(absl::is_trivially_default_constructible<Trivial10>::value);
-  using TrivialDefaultCtor10 = TrivialDefaultCtor[10];
-  EXPECT_TRUE(
-      absl::is_trivially_default_constructible<TrivialDefaultCtor10>::value);
-
-  // Conversely, the opposite also holds.
-#ifdef ABSL_GCC_BUG_TRIVIALLY_CONSTRUCTIBLE_ON_ARRAY_OF_NONTRIVIAL
-  using NontrivialDefaultCtor10 = NontrivialDefaultCtor[10];
-  EXPECT_FALSE(
-      absl::is_trivially_default_constructible<NontrivialDefaultCtor10>::value);
-#endif
-}
-
-// GCC prior to 7.4 had a bug in its trivially-constructible traits
-// (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80654).
-// This test makes sure that we do not depend on the trait in these cases when
-// implementing absl triviality traits.
-
-template <class T>
-struct BadConstructors {
-  BadConstructors() { static_assert(T::value, ""); }
-
-  BadConstructors(BadConstructors&&) { static_assert(T::value, ""); }
-
-  BadConstructors(const BadConstructors&) { static_assert(T::value, ""); }
-};
-
-TEST(TypeTraitsTest, TestTrivialityBadConstructors) {
-  using BadType = BadConstructors<int>;
-
-  EXPECT_FALSE(absl::is_trivially_default_constructible<BadType>::value);
-  EXPECT_FALSE(absl::is_trivially_move_constructible<BadType>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<BadType>::value);
-}
-
-TEST(TypeTraitsTest, TestTrivialMoveCtor) {
-  // Verify that arithmetic types and pointers have trivial move
-  // constructors.
-  EXPECT_TRUE(absl::is_trivially_move_constructible<bool>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<char>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<unsigned char>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<signed char>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<wchar_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<int>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<unsigned int>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<int16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<uint16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<int64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<uint64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<float>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<double>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<long double>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<const std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<const Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<std::string**>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<Trivial**>::value);
-
-  // Reference types
-  EXPECT_TRUE(absl::is_trivially_move_constructible<int&>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<int&&>::value);
-
-  // types with compiler generated move ctors
-  EXPECT_TRUE(absl::is_trivially_move_constructible<Trivial>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<TrivialMoveCtor>::value);
-
-  // Verify that types without them (i.e. nontrivial or deleted) are not.
-  EXPECT_FALSE(
-      absl::is_trivially_move_constructible<NontrivialCopyCtor>::value);
-  EXPECT_FALSE(absl::is_trivially_move_constructible<DeletedCopyCtor>::value);
-  EXPECT_FALSE(
-      absl::is_trivially_move_constructible<NonCopyableOrMovable>::value);
-
-  // type with nontrivial destructor are nontrivial move construbtible
-  EXPECT_FALSE(
-      absl::is_trivially_move_constructible<NontrivialDestructor>::value);
-
-  // types with vtables
-  EXPECT_FALSE(absl::is_trivially_move_constructible<Base>::value);
-
-  // Verify that simple_pair of such types is trivially move constructible
-  EXPECT_TRUE(
-      (absl::is_trivially_move_constructible<simple_pair<int, char*>>::value));
-  EXPECT_TRUE((
-      absl::is_trivially_move_constructible<simple_pair<int, Trivial>>::value));
-  EXPECT_TRUE((absl::is_trivially_move_constructible<
-               simple_pair<int, TrivialMoveCtor>>::value));
-
-  // Verify that types without trivial move constructors are
-  // correctly marked as such.
-  EXPECT_FALSE(absl::is_trivially_move_constructible<std::string>::value);
-  EXPECT_FALSE(absl::is_trivially_move_constructible<std::vector<int>>::value);
-
-  // Verify that simple_pairs of types without trivial move constructors
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::is_trivially_move_constructible<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::is_trivially_move_constructible<
-                simple_pair<std::string, int>>::value));
-
-  // Verify that arrays are not
-  using int10 = int[10];
-  EXPECT_FALSE(absl::is_trivially_move_constructible<int10>::value);
-}
-
-TEST(TypeTraitsTest, TestTrivialCopyCtor) {
-  // Verify that arithmetic types and pointers have trivial copy
-  // constructors.
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<bool>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<char>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<unsigned char>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<signed char>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<wchar_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<int>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<unsigned int>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<int16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<uint16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<int64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<uint64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<float>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<double>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<long double>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<const std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<const Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<std::string**>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<Trivial**>::value);
-
-  // Reference types
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<int&>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<int&&>::value);
-
-  // types with compiler generated copy ctors
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<Trivial>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<TrivialCopyCtor>::value);
-
-  // Verify that types without them (i.e. nontrivial or deleted) are not.
-  EXPECT_FALSE(
-      absl::is_trivially_copy_constructible<NontrivialCopyCtor>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<DeletedCopyCtor>::value);
-  EXPECT_FALSE(
-      absl::is_trivially_copy_constructible<MovableNonCopyable>::value);
-  EXPECT_FALSE(
-      absl::is_trivially_copy_constructible<NonCopyableOrMovable>::value);
-
-  // type with nontrivial destructor are nontrivial copy construbtible
-  EXPECT_FALSE(
-      absl::is_trivially_copy_constructible<NontrivialDestructor>::value);
-
-  // types with vtables
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<Base>::value);
-
-  // Verify that simple_pair of such types is trivially copy constructible
-  EXPECT_TRUE(
-      (absl::is_trivially_copy_constructible<simple_pair<int, char*>>::value));
-  EXPECT_TRUE((
-      absl::is_trivially_copy_constructible<simple_pair<int, Trivial>>::value));
-  EXPECT_TRUE((absl::is_trivially_copy_constructible<
-               simple_pair<int, TrivialCopyCtor>>::value));
-
-  // Verify that types without trivial copy constructors are
-  // correctly marked as such.
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<std::string>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<std::vector<int>>::value);
-
-  // Verify that simple_pairs of types without trivial copy constructors
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::is_trivially_copy_constructible<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::is_trivially_copy_constructible<
-                simple_pair<std::string, int>>::value));
-
-  // Verify that arrays are not
-  using int10 = int[10];
-  EXPECT_FALSE(absl::is_trivially_copy_constructible<int10>::value);
-}
-
-TEST(TypeTraitsTest, TestTrivialMoveAssign) {
-  // Verify that arithmetic types and pointers have trivial move
-  // assignment operators.
-  EXPECT_TRUE(absl::is_trivially_move_assignable<bool>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<char>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<unsigned char>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<signed char>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<wchar_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<int>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<unsigned int>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<int16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<uint16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<int64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<uint64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<float>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<double>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<long double>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<const std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<const Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<std::string**>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial**>::value);
-
-  // const qualified types are not assignable
-  EXPECT_FALSE(absl::is_trivially_move_assignable<const int>::value);
-
-  // types with compiler generated move assignment
-  EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<TrivialMoveAssign>::value);
-
-  // Verify that types without them (i.e. nontrivial or deleted) are not.
-  EXPECT_FALSE(absl::is_trivially_move_assignable<NontrivialCopyAssign>::value);
-  EXPECT_FALSE(absl::is_trivially_move_assignable<DeletedCopyAssign>::value);
-  EXPECT_FALSE(absl::is_trivially_move_assignable<NonCopyableOrMovable>::value);
-
-  // types with vtables
-  EXPECT_FALSE(absl::is_trivially_move_assignable<Base>::value);
-
-  // Verify that simple_pair is trivially assignable
-  EXPECT_TRUE(
-      (absl::is_trivially_move_assignable<simple_pair<int, char*>>::value));
-  EXPECT_TRUE(
-      (absl::is_trivially_move_assignable<simple_pair<int, Trivial>>::value));
-  EXPECT_TRUE((absl::is_trivially_move_assignable<
-               simple_pair<int, TrivialMoveAssign>>::value));
-
-  // Verify that types not trivially move assignable are
-  // correctly marked as such.
-  EXPECT_FALSE(absl::is_trivially_move_assignable<std::string>::value);
-  EXPECT_FALSE(absl::is_trivially_move_assignable<std::vector<int>>::value);
-
-  // Verify that simple_pairs of types not trivially move assignable
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::is_trivially_move_assignable<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::is_trivially_move_assignable<
-                simple_pair<std::string, int>>::value));
-
-  // Verify that arrays are not trivially move assignable
-  using int10 = int[10];
-  EXPECT_FALSE(absl::is_trivially_move_assignable<int10>::value);
-
-  // Verify that references are handled correctly
-  EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial&&>::value);
-  EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial&>::value);
-}
-
-TEST(TypeTraitsTest, TestTrivialCopyAssign) {
-  // Verify that arithmetic types and pointers have trivial copy
-  // assignment operators.
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<bool>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<char>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<unsigned char>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<signed char>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<wchar_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<int>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<unsigned int>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<int16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<uint16_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<int64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<uint64_t>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<float>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<double>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<long double>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<const std::string*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<const Trivial*>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<std::string**>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial**>::value);
-
-  // const qualified types are not assignable
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<const int>::value);
-
-  // types with compiler generated copy assignment
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<TrivialCopyAssign>::value);
-
-  // Verify that types without them (i.e. nontrivial or deleted) are not.
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<NontrivialCopyAssign>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<DeletedCopyAssign>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<MovableNonCopyable>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<NonCopyableOrMovable>::value);
-
-  // types with vtables
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<Base>::value);
-
-  // Verify that simple_pair is trivially assignable
-  EXPECT_TRUE(
-      (absl::is_trivially_copy_assignable<simple_pair<int, char*>>::value));
-  EXPECT_TRUE(
-      (absl::is_trivially_copy_assignable<simple_pair<int, Trivial>>::value));
-  EXPECT_TRUE((absl::is_trivially_copy_assignable<
-               simple_pair<int, TrivialCopyAssign>>::value));
-
-  // Verify that types not trivially copy assignable are
-  // correctly marked as such.
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<std::string>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<std::vector<int>>::value);
-
-  // Verify that simple_pairs of types not trivially copy assignable
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::is_trivially_copy_assignable<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::is_trivially_copy_assignable<
-                simple_pair<std::string, int>>::value));
-
-  // Verify that arrays are not trivially copy assignable
-  using int10 = int[10];
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<int10>::value);
-
-  // Verify that references are handled correctly
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial&&>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial&>::value);
-}
-
-TEST(TypeTraitsTest, TestTriviallyCopyable) {
-  // Verify that arithmetic types and pointers are trivially copyable.
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<bool>::value);
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<char>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<unsigned char>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<signed char>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<wchar_t>::value);
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<int>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<unsigned int>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<int16_t>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<uint16_t>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<int64_t>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<uint64_t>::value);
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<float>::value);
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<double>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<long double>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<std::string*>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<Trivial*>::value);
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<
-              const std::string*>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<const Trivial*>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<std::string**>::value);
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<Trivial**>::value);
-
-  // const qualified types are not assignable but are constructible
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<const int>::value);
-
-  // Trivial copy constructor/assignment and destructor.
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<Trivial>::value);
-  // Trivial copy assignment, but non-trivial copy constructor/destructor.
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<
-               TrivialCopyAssign>::value);
-  // Trivial copy constructor, but non-trivial assignment.
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<
-               TrivialCopyCtor>::value);
-
-  // Types with a non-trivial copy constructor/assignment
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<
-               NontrivialCopyCtor>::value);
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<
-               NontrivialCopyAssign>::value);
-
-  // Types without copy constructor/assignment, but with move
-  // MSVC disagrees with other compilers about this:
-  // EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<
-  //             MovableNonCopyable>::value);
-
-  // Types without copy/move constructor/assignment
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<
-               NonCopyableOrMovable>::value);
-
-  // No copy assign, but has trivial copy constructor.
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<
-              DeletedCopyAssign>::value);
-
-  // types with vtables
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<Base>::value);
-
-  // Verify that simple_pair is trivially copyable if members are
-  EXPECT_TRUE((absl::type_traits_internal::is_trivially_copyable<
-               simple_pair<int, char*>>::value));
-  EXPECT_TRUE((absl::type_traits_internal::is_trivially_copyable<
-               simple_pair<int, Trivial>>::value));
-
-  // Verify that types not trivially copyable are
-  // correctly marked as such.
-  EXPECT_FALSE(
-      absl::type_traits_internal::is_trivially_copyable<std::string>::value);
-  EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<
-               std::vector<int>>::value);
-
-  // Verify that simple_pairs of types not trivially copyable
-  // are not marked as trivial.
-  EXPECT_FALSE((absl::type_traits_internal::is_trivially_copyable<
-                simple_pair<int, std::string>>::value));
-  EXPECT_FALSE((absl::type_traits_internal::is_trivially_copyable<
-                simple_pair<std::string, int>>::value));
-  EXPECT_FALSE((absl::type_traits_internal::is_trivially_copyable<
-                simple_pair<int, TrivialCopyAssign>>::value));
-
-  // Verify that arrays of trivially copyable types are trivially copyable
-  using int10 = int[10];
-  EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<int10>::value);
-  using int10x10 = int[10][10];
-  EXPECT_TRUE(
-      absl::type_traits_internal::is_trivially_copyable<int10x10>::value);
-
-  // Verify that references are handled correctly
-  EXPECT_FALSE(
-      absl::type_traits_internal::is_trivially_copyable<Trivial&&>::value);
-  EXPECT_FALSE(
-      absl::type_traits_internal::is_trivially_copyable<Trivial&>::value);
-}
-
-#define ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(trait_name, ...)          \
-  EXPECT_TRUE((std::is_same<typename std::trait_name<__VA_ARGS__>::type, \
-                            absl::trait_name##_t<__VA_ARGS__>>::value))
-
-TEST(TypeTraitsTest, TestRemoveCVAliases) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_cv, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_cv, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_cv, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_cv, const volatile int);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_const, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_const, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_const, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_const, const volatile int);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_volatile, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_volatile, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_volatile, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_volatile, const volatile int);
-}
-
-TEST(TypeTraitsTest, TestAddCVAliases) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_cv, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_cv, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_cv, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_cv, const volatile int);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_const, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_const, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_const, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_const, const volatile int);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_volatile, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_volatile, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_volatile, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_volatile, const volatile int);
-}
-
-TEST(TypeTraitsTest, TestReferenceAliases) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_reference, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_reference, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_reference, int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_reference, volatile int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_reference, int&&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_reference, volatile int&&);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_lvalue_reference, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_lvalue_reference, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_lvalue_reference, int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_lvalue_reference, volatile int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_lvalue_reference, int&&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_lvalue_reference, volatile int&&);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_rvalue_reference, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_rvalue_reference, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_rvalue_reference, int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_rvalue_reference, volatile int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_rvalue_reference, int&&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_rvalue_reference, volatile int&&);
-}
-
-TEST(TypeTraitsTest, TestPointerAliases) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_pointer, int*);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_pointer, volatile int*);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_pointer, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(add_pointer, volatile int);
-}
-
-TEST(TypeTraitsTest, TestSignednessAliases) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_signed, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_signed, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_signed, unsigned);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_signed, volatile unsigned);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_unsigned, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_unsigned, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_unsigned, unsigned);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(make_unsigned, volatile unsigned);
-}
-
-TEST(TypeTraitsTest, TestExtentAliases) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_extent, int[]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_extent, int[1]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_extent, int[1][1]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_extent, int[][1]);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_all_extents, int[]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_all_extents, int[1]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_all_extents, int[1][1]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(remove_all_extents, int[][1]);
-}
-
-TEST(TypeTraitsTest, TestAlignedStorageAlias) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 1);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 2);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 3);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 4);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 5);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 6);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 7);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 8);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 9);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 10);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 11);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 12);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 13);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 14);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 15);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 16);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 17);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 18);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 19);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 20);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 21);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 22);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 23);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 24);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 25);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 26);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 27);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 28);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 29);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 30);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 31);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 32);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 33);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 1, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 2, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 3, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 4, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 5, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 6, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 7, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 8, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 9, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 10, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 11, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 12, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 13, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 14, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 15, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 16, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 17, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 18, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 19, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 20, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 21, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 22, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 23, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 24, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 25, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 26, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 27, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 28, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 29, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 30, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 31, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 32, 128);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(aligned_storage, 33, 128);
-}
-
-TEST(TypeTraitsTest, TestDecay) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, const int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, volatile int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, const volatile int);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, const int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, volatile int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, const volatile int&);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, const int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, volatile int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, const volatile int&);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int[1]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int[1][1]);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int[][1]);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int());
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int(float));  // NOLINT
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(decay, int(char, ...));  // NOLINT
-}
-
-struct TypeA {};
-struct TypeB {};
-struct TypeC {};
-struct TypeD {};
-
-template <typename T>
-struct Wrap {};
-
-enum class TypeEnum { A, B, C, D };
-
-struct GetTypeT {
-  template <typename T,
-            absl::enable_if_t<std::is_same<T, TypeA>::value, int> = 0>
-  TypeEnum operator()(Wrap<T>) const {
-    return TypeEnum::A;
-  }
-
-  template <typename T,
-            absl::enable_if_t<std::is_same<T, TypeB>::value, int> = 0>
-  TypeEnum operator()(Wrap<T>) const {
-    return TypeEnum::B;
-  }
-
-  template <typename T,
-            absl::enable_if_t<std::is_same<T, TypeC>::value, int> = 0>
-  TypeEnum operator()(Wrap<T>) const {
-    return TypeEnum::C;
-  }
-
-  // NOTE: TypeD is intentionally not handled
-} constexpr GetType = {};
-
-TEST(TypeTraitsTest, TestEnableIf) {
-  EXPECT_EQ(TypeEnum::A, GetType(Wrap<TypeA>()));
-  EXPECT_EQ(TypeEnum::B, GetType(Wrap<TypeB>()));
-  EXPECT_EQ(TypeEnum::C, GetType(Wrap<TypeC>()));
-}
-
-TEST(TypeTraitsTest, TestConditional) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(conditional, true, int, char);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(conditional, false, int, char);
-}
-
-// TODO(calabrese) Check with specialized std::common_type
-TEST(TypeTraitsTest, TestCommonType) {
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(common_type, int);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(common_type, int, char);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(common_type, int, char, int);
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(common_type, int&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(common_type, int, char&);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(common_type, int, char, int&);
-}
-
-TEST(TypeTraitsTest, TestUnderlyingType) {
-  enum class enum_char : char {};
-  enum class enum_long_long : long long {};  // NOLINT(runtime/int)
-
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(underlying_type, enum_char);
-  ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(underlying_type, enum_long_long);
-}
-
-struct GetTypeExtT {
-  template <typename T>
-  absl::result_of_t<const GetTypeT&(T)> operator()(T&& arg) const {
-    return GetType(std::forward<T>(arg));
-  }
-
-  TypeEnum operator()(Wrap<TypeD>) const { return TypeEnum::D; }
-} constexpr GetTypeExt = {};
-
-TEST(TypeTraitsTest, TestResultOf) {
-  EXPECT_EQ(TypeEnum::A, GetTypeExt(Wrap<TypeA>()));
-  EXPECT_EQ(TypeEnum::B, GetTypeExt(Wrap<TypeB>()));
-  EXPECT_EQ(TypeEnum::C, GetTypeExt(Wrap<TypeC>()));
-  EXPECT_EQ(TypeEnum::D, GetTypeExt(Wrap<TypeD>()));
-}
-
-template <typename T>
-bool TestCopyAssign() {
-  return absl::is_copy_assignable<T>::value ==
-         std::is_copy_assignable<T>::value;
-}
-
-TEST(TypeTraitsTest, IsCopyAssignable) {
-  EXPECT_TRUE(TestCopyAssign<int>());
-  EXPECT_TRUE(TestCopyAssign<int&>());
-  EXPECT_TRUE(TestCopyAssign<int&&>());
-
-  struct S {};
-  EXPECT_TRUE(TestCopyAssign<S>());
-  EXPECT_TRUE(TestCopyAssign<S&>());
-  EXPECT_TRUE(TestCopyAssign<S&&>());
-
-  class C {
-   public:
-    explicit C(C* c) : c_(c) {}
-    ~C() { delete c_; }
-
-   private:
-    C* c_;
-  };
-  EXPECT_TRUE(TestCopyAssign<C>());
-  EXPECT_TRUE(TestCopyAssign<C&>());
-  EXPECT_TRUE(TestCopyAssign<C&&>());
-
-  // Reason for ifndef: add_lvalue_reference<T> in libc++ breaks for these cases
-#ifndef _LIBCPP_VERSION
-  EXPECT_TRUE(TestCopyAssign<int()>());
-  EXPECT_TRUE(TestCopyAssign<int(int) const>());
-  EXPECT_TRUE(TestCopyAssign<int(...) volatile&>());
-  EXPECT_TRUE(TestCopyAssign<int(int, ...) const volatile&&>());
-#endif  // _LIBCPP_VERSION
-}
-
-template <typename T>
-bool TestMoveAssign() {
-  return absl::is_move_assignable<T>::value ==
-         std::is_move_assignable<T>::value;
-}
-
-TEST(TypeTraitsTest, IsMoveAssignable) {
-  EXPECT_TRUE(TestMoveAssign<int>());
-  EXPECT_TRUE(TestMoveAssign<int&>());
-  EXPECT_TRUE(TestMoveAssign<int&&>());
-
-  struct S {};
-  EXPECT_TRUE(TestMoveAssign<S>());
-  EXPECT_TRUE(TestMoveAssign<S&>());
-  EXPECT_TRUE(TestMoveAssign<S&&>());
-
-  class C {
-   public:
-    explicit C(C* c) : c_(c) {}
-    ~C() { delete c_; }
-    void operator=(const C&) = delete;
-    void operator=(C&&) = delete;
-
-   private:
-    C* c_;
-  };
-  EXPECT_TRUE(TestMoveAssign<C>());
-  EXPECT_TRUE(TestMoveAssign<C&>());
-  EXPECT_TRUE(TestMoveAssign<C&&>());
-
-  // Reason for ifndef: add_lvalue_reference<T> in libc++ breaks for these cases
-#ifndef _LIBCPP_VERSION
-  EXPECT_TRUE(TestMoveAssign<int()>());
-  EXPECT_TRUE(TestMoveAssign<int(int) const>());
-  EXPECT_TRUE(TestMoveAssign<int(...) volatile&>());
-  EXPECT_TRUE(TestMoveAssign<int(int, ...) const volatile&&>());
-#endif  // _LIBCPP_VERSION
-}
-
-namespace adl_namespace {
-
-struct DeletedSwap {
-};
-
-void swap(DeletedSwap&, DeletedSwap&) = delete;
-
-struct SpecialNoexceptSwap {
-  SpecialNoexceptSwap(SpecialNoexceptSwap&&) {}
-  SpecialNoexceptSwap& operator=(SpecialNoexceptSwap&&) { return *this; }
-  ~SpecialNoexceptSwap() = default;
-};
-
-void swap(SpecialNoexceptSwap&, SpecialNoexceptSwap&) noexcept {}
-
-}  // namespace adl_namespace
-
-TEST(TypeTraitsTest, IsSwappable) {
-  using absl::type_traits_internal::IsSwappable;
-  using absl::type_traits_internal::StdSwapIsUnconstrained;
-
-  EXPECT_TRUE(IsSwappable<int>::value);
-
-  struct S {};
-  EXPECT_TRUE(IsSwappable<S>::value);
-
-  struct NoConstruct {
-    NoConstruct(NoConstruct&&) = delete;
-    NoConstruct& operator=(NoConstruct&&) { return *this; }
-    ~NoConstruct() = default;
-  };
-
-  EXPECT_EQ(IsSwappable<NoConstruct>::value, StdSwapIsUnconstrained::value);
-  struct NoAssign {
-    NoAssign(NoAssign&&) {}
-    NoAssign& operator=(NoAssign&&) = delete;
-    ~NoAssign() = default;
-  };
-
-  EXPECT_EQ(IsSwappable<NoAssign>::value, StdSwapIsUnconstrained::value);
-
-  EXPECT_FALSE(IsSwappable<adl_namespace::DeletedSwap>::value);
-
-  EXPECT_TRUE(IsSwappable<adl_namespace::SpecialNoexceptSwap>::value);
-}
-
-TEST(TypeTraitsTest, IsNothrowSwappable) {
-  using absl::type_traits_internal::IsNothrowSwappable;
-  using absl::type_traits_internal::StdSwapIsUnconstrained;
-
-  EXPECT_TRUE(IsNothrowSwappable<int>::value);
-
-  struct NonNoexceptMoves {
-    NonNoexceptMoves(NonNoexceptMoves&&) {}
-    NonNoexceptMoves& operator=(NonNoexceptMoves&&) { return *this; }
-    ~NonNoexceptMoves() = default;
-  };
-
-  EXPECT_FALSE(IsNothrowSwappable<NonNoexceptMoves>::value);
-
-  struct NoConstruct {
-    NoConstruct(NoConstruct&&) = delete;
-    NoConstruct& operator=(NoConstruct&&) { return *this; }
-    ~NoConstruct() = default;
-  };
-
-  EXPECT_FALSE(IsNothrowSwappable<NoConstruct>::value);
-
-  struct NoAssign {
-    NoAssign(NoAssign&&) {}
-    NoAssign& operator=(NoAssign&&) = delete;
-    ~NoAssign() = default;
-  };
-
-  EXPECT_FALSE(IsNothrowSwappable<NoAssign>::value);
-
-  EXPECT_FALSE(IsNothrowSwappable<adl_namespace::DeletedSwap>::value);
-
-  EXPECT_TRUE(IsNothrowSwappable<adl_namespace::SpecialNoexceptSwap>::value);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/numeric/BUILD.bazel b/third_party/abseil/absl/numeric/BUILD.bazel
deleted file mode 100644
index 5d7b185..0000000
--- a/third_party/abseil/absl/numeric/BUILD.bazel
+++ /dev/null
@@ -1,103 +0,0 @@
-# Copyright 2018 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "bits",
-    hdrs = [
-        "bits.h",
-        "internal/bits.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_test(
-    name = "bits_test",
-    size = "small",
-    srcs = [
-        "bits_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bits",
-        "//absl/random",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "int128",
-    srcs = [
-        "int128.cc",
-        "int128_have_intrinsic.inc",
-        "int128_no_intrinsic.inc",
-    ],
-    hdrs = ["int128.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bits",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_test(
-    name = "int128_test",
-    size = "small",
-    srcs = [
-        "int128_stream_test.cc",
-        "int128_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":int128",
-        "//absl/base",
-        "//absl/base:core_headers",
-        "//absl/hash:hash_testing",
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "int128_benchmark",
-    srcs = ["int128_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    deps = [
-        ":int128",
-        "//absl/base:config",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
diff --git a/third_party/abseil/absl/numeric/CMakeLists.txt b/third_party/abseil/absl/numeric/CMakeLists.txt
deleted file mode 100644
index be94352..0000000
--- a/third_party/abseil/absl/numeric/CMakeLists.txt
+++ /dev/null
@@ -1,88 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    bits
-  HDRS
-    "bits.h"
-    "internal/bits.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::core_headers
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    bits_test
-  SRCS
-    "bits_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::bits
-    absl::core_headers
-    absl::random_random
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    int128
-  HDRS
-    "int128.h"
-  SRCS
-    "int128.cc"
-    "int128_have_intrinsic.inc"
-    "int128_no_intrinsic.inc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::bits
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    int128_test
-  SRCS
-    "int128_stream_test.cc"
-    "int128_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::int128
-    absl::base
-    absl::core_headers
-    absl::hash_testing
-    absl::type_traits
-    gmock_main
-)
-
-# component target
-absl_cc_library(
-  NAME
-    numeric
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::int128
-  PUBLIC
-)
diff --git a/third_party/abseil/absl/numeric/bits.h b/third_party/abseil/absl/numeric/bits.h
deleted file mode 100644
index 52013ad..0000000
--- a/third_party/abseil/absl/numeric/bits.h
+++ /dev/null
@@ -1,177 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: bits.h
-// -----------------------------------------------------------------------------
-//
-// This file contains implementations of C++20's bitwise math functions, as
-// defined by:
-//
-// P0553R4:
-//  http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p0553r4.html
-// P0556R3:
-//  http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0556r3.html
-// P1355R2:
-//  http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1355r2.html
-// P1956R1:
-//  http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1956r1.pdf
-//
-// When using a standard library that implements these functions, we use the
-// standard library's implementation.
-
-#ifndef ABSL_NUMERIC_BITS_H_
-#define ABSL_NUMERIC_BITS_H_
-
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-#if (defined(__cpp_lib_int_pow2) && __cpp_lib_int_pow2 >= 202002L) || \
-    (defined(__cpp_lib_bitops) && __cpp_lib_bitops >= 201907L)
-#include <bit>
-#endif
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/numeric/internal/bits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-#if !(defined(__cpp_lib_bitops) && __cpp_lib_bitops >= 201907L)
-// rotating
-template <class T>
-ABSL_MUST_USE_RESULT constexpr
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    rotl(T x, int s) noexcept {
-  return numeric_internal::RotateLeft(x, s);
-}
-
-template <class T>
-ABSL_MUST_USE_RESULT constexpr
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    rotr(T x, int s) noexcept {
-  return numeric_internal::RotateRight(x, s);
-}
-
-// Counting functions
-//
-// While these functions are typically constexpr, on some platforms, they may
-// not be marked as constexpr due to constraints of the compiler/available
-// intrinsics.
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, int>::type
-    countl_zero(T x) noexcept {
-  return numeric_internal::CountLeadingZeroes(x);
-}
-
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, int>::type
-    countl_one(T x) noexcept {
-  // Avoid integer promotion to a wider type
-  return countl_zero(static_cast<T>(~x));
-}
-
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CTZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, int>::type
-    countr_zero(T x) noexcept {
-  return numeric_internal::CountTrailingZeroes(x);
-}
-
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CTZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, int>::type
-    countr_one(T x) noexcept {
-  // Avoid integer promotion to a wider type
-  return countr_zero(static_cast<T>(~x));
-}
-
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_POPCOUNT inline
-    typename std::enable_if<std::is_unsigned<T>::value, int>::type
-    popcount(T x) noexcept {
-  return numeric_internal::Popcount(x);
-}
-#else  // defined(__cpp_lib_bitops) && __cpp_lib_bitops >= 201907L
-
-using std::countl_one;
-using std::countl_zero;
-using std::countr_one;
-using std::countr_zero;
-using std::popcount;
-using std::rotl;
-using std::rotr;
-
-#endif
-
-#if !(defined(__cpp_lib_int_pow2) && __cpp_lib_int_pow2 >= 202002L)
-// Returns: true if x is an integral power of two; false otherwise.
-template <class T>
-constexpr inline typename std::enable_if<std::is_unsigned<T>::value, bool>::type
-has_single_bit(T x) noexcept {
-  return x != 0 && (x & (x - 1)) == 0;
-}
-
-// Returns: If x == 0, 0; otherwise one plus the base-2 logarithm of x, with any
-// fractional part discarded.
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    bit_width(T x) noexcept {
-  return std::numeric_limits<T>::digits - countl_zero(x);
-}
-
-// Returns: If x == 0, 0; otherwise the maximal value y such that
-// has_single_bit(y) is true and y <= x.
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    bit_floor(T x) noexcept {
-  return x == 0 ? 0 : T{1} << (bit_width(x) - 1);
-}
-
-// Returns: N, where N is the smallest power of 2 greater than or equal to x.
-//
-// Preconditions: N is representable as a value of type T.
-template <class T>
-ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    bit_ceil(T x) {
-  // If T is narrower than unsigned, T{1} << bit_width will be promoted.  We
-  // want to force it to wraparound so that bit_ceil of an invalid value are not
-  // core constant expressions.
-  //
-  // BitCeilNonPowerOf2 triggers an overflow in constexpr contexts if we would
-  // undergo promotion to unsigned but not fit the result into T without
-  // truncation.
-  return has_single_bit(x) ? T{1} << (bit_width(x) - 1)
-                           : numeric_internal::BitCeilNonPowerOf2(x);
-}
-#else  // defined(__cpp_lib_int_pow2) && __cpp_lib_int_pow2 >= 202002L
-
-using std::bit_ceil;
-using std::bit_floor;
-using std::bit_width;
-using std::has_single_bit;
-
-#endif
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_NUMERIC_BITS_H_
diff --git a/third_party/abseil/absl/numeric/bits_test.cc b/third_party/abseil/absl/numeric/bits_test.cc
deleted file mode 100644
index 8bf7bc9..0000000
--- a/third_party/abseil/absl/numeric/bits_test.cc
+++ /dev/null
@@ -1,565 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/numeric/bits.h"
-
-#include <limits>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/random/random.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-TEST(Rotate, Left) {
-  static_assert(rotl(uint8_t{0x12}, 0) == uint8_t{0x12}, "");
-  static_assert(rotl(uint16_t{0x1234}, 0) == uint16_t{0x1234}, "");
-  static_assert(rotl(uint32_t{0x12345678UL}, 0) == uint32_t{0x12345678UL}, "");
-  static_assert(rotl(uint64_t{0x12345678ABCDEF01ULL}, 0) ==
-                    uint64_t{0x12345678ABCDEF01ULL},
-                "");
-
-  EXPECT_EQ(rotl(uint8_t{0x12}, 0), uint8_t{0x12});
-  EXPECT_EQ(rotl(uint16_t{0x1234}, 0), uint16_t{0x1234});
-  EXPECT_EQ(rotl(uint32_t{0x12345678UL}, 0), uint32_t{0x12345678UL});
-  EXPECT_EQ(rotl(uint64_t{0x12345678ABCDEF01ULL}, 0),
-            uint64_t{0x12345678ABCDEF01ULL});
-
-  EXPECT_EQ(rotl(uint8_t{0x12}, 8), uint8_t{0x12});
-  EXPECT_EQ(rotl(uint16_t{0x1234}, 16), uint16_t{0x1234});
-  EXPECT_EQ(rotl(uint32_t{0x12345678UL}, 32), uint32_t{0x12345678UL});
-  EXPECT_EQ(rotl(uint64_t{0x12345678ABCDEF01ULL}, 64),
-            uint64_t{0x12345678ABCDEF01ULL});
-
-  EXPECT_EQ(rotl(uint8_t{0x12}, -8), uint8_t{0x12});
-  EXPECT_EQ(rotl(uint16_t{0x1234}, -16), uint16_t{0x1234});
-  EXPECT_EQ(rotl(uint32_t{0x12345678UL}, -32), uint32_t{0x12345678UL});
-  EXPECT_EQ(rotl(uint64_t{0x12345678ABCDEF01ULL}, -64),
-            uint64_t{0x12345678ABCDEF01ULL});
-
-  EXPECT_EQ(rotl(uint8_t{0x12}, 4), uint8_t{0x21});
-  EXPECT_EQ(rotl(uint16_t{0x1234}, 4), uint16_t{0x2341});
-  EXPECT_EQ(rotl(uint32_t{0x12345678UL}, 4), uint32_t{0x23456781UL});
-  EXPECT_EQ(rotl(uint64_t{0x12345678ABCDEF01ULL}, 4),
-            uint64_t{0x2345678ABCDEF011ULL});
-
-  EXPECT_EQ(rotl(uint8_t{0x12}, -4), uint8_t{0x21});
-  EXPECT_EQ(rotl(uint16_t{0x1234}, -4), uint16_t{0x4123});
-  EXPECT_EQ(rotl(uint32_t{0x12345678UL}, -4), uint32_t{0x81234567UL});
-  EXPECT_EQ(rotl(uint64_t{0x12345678ABCDEF01ULL}, -4),
-            uint64_t{0x112345678ABCDEF0ULL});
-}
-
-TEST(Rotate, Right) {
-  static_assert(rotr(uint8_t{0x12}, 0) == uint8_t{0x12}, "");
-  static_assert(rotr(uint16_t{0x1234}, 0) == uint16_t{0x1234}, "");
-  static_assert(rotr(uint32_t{0x12345678UL}, 0) == uint32_t{0x12345678UL}, "");
-  static_assert(rotr(uint64_t{0x12345678ABCDEF01ULL}, 0) ==
-                    uint64_t{0x12345678ABCDEF01ULL},
-                "");
-
-  EXPECT_EQ(rotr(uint8_t{0x12}, 0), uint8_t{0x12});
-  EXPECT_EQ(rotr(uint16_t{0x1234}, 0), uint16_t{0x1234});
-  EXPECT_EQ(rotr(uint32_t{0x12345678UL}, 0), uint32_t{0x12345678UL});
-  EXPECT_EQ(rotr(uint64_t{0x12345678ABCDEF01ULL}, 0),
-            uint64_t{0x12345678ABCDEF01ULL});
-
-  EXPECT_EQ(rotr(uint8_t{0x12}, 8), uint8_t{0x12});
-  EXPECT_EQ(rotr(uint16_t{0x1234}, 16), uint16_t{0x1234});
-  EXPECT_EQ(rotr(uint32_t{0x12345678UL}, 32), uint32_t{0x12345678UL});
-  EXPECT_EQ(rotr(uint64_t{0x12345678ABCDEF01ULL}, 64),
-            uint64_t{0x12345678ABCDEF01ULL});
-
-  EXPECT_EQ(rotr(uint8_t{0x12}, -8), uint8_t{0x12});
-  EXPECT_EQ(rotr(uint16_t{0x1234}, -16), uint16_t{0x1234});
-  EXPECT_EQ(rotr(uint32_t{0x12345678UL}, -32), uint32_t{0x12345678UL});
-  EXPECT_EQ(rotr(uint64_t{0x12345678ABCDEF01ULL}, -64),
-            uint64_t{0x12345678ABCDEF01ULL});
-
-  EXPECT_EQ(rotr(uint8_t{0x12}, 4), uint8_t{0x21});
-  EXPECT_EQ(rotr(uint16_t{0x1234}, 4), uint16_t{0x4123});
-  EXPECT_EQ(rotr(uint32_t{0x12345678UL}, 4), uint32_t{0x81234567UL});
-  EXPECT_EQ(rotr(uint64_t{0x12345678ABCDEF01ULL}, 4),
-            uint64_t{0x112345678ABCDEF0ULL});
-
-  EXPECT_EQ(rotr(uint8_t{0x12}, -4), uint8_t{0x21});
-  EXPECT_EQ(rotr(uint16_t{0x1234}, -4), uint16_t{0x2341});
-  EXPECT_EQ(rotr(uint32_t{0x12345678UL}, -4), uint32_t{0x23456781UL});
-  EXPECT_EQ(rotr(uint64_t{0x12345678ABCDEF01ULL}, -4),
-            uint64_t{0x2345678ABCDEF011ULL});
-}
-
-TEST(Rotate, Symmetry) {
-  // rotr(x, s) is equivalent to rotl(x, -s)
-  absl::BitGen rng;
-  constexpr int kTrials = 100;
-
-  for (int i = 0; i < kTrials; ++i) {
-    uint8_t value = absl::Uniform(rng, std::numeric_limits<uint8_t>::min(),
-                                  std::numeric_limits<uint8_t>::max());
-    int shift = absl::Uniform(rng, -2 * std::numeric_limits<uint8_t>::digits,
-                              2 * std::numeric_limits<uint8_t>::digits);
-
-    EXPECT_EQ(rotl(value, shift), rotr(value, -shift));
-  }
-
-  for (int i = 0; i < kTrials; ++i) {
-    uint16_t value = absl::Uniform(rng, std::numeric_limits<uint16_t>::min(),
-                                   std::numeric_limits<uint16_t>::max());
-    int shift = absl::Uniform(rng, -2 * std::numeric_limits<uint16_t>::digits,
-                              2 * std::numeric_limits<uint16_t>::digits);
-
-    EXPECT_EQ(rotl(value, shift), rotr(value, -shift));
-  }
-
-  for (int i = 0; i < kTrials; ++i) {
-    uint32_t value = absl::Uniform(rng, std::numeric_limits<uint32_t>::min(),
-                                   std::numeric_limits<uint32_t>::max());
-    int shift = absl::Uniform(rng, -2 * std::numeric_limits<uint32_t>::digits,
-                              2 * std::numeric_limits<uint32_t>::digits);
-
-    EXPECT_EQ(rotl(value, shift), rotr(value, -shift));
-  }
-
-  for (int i = 0; i < kTrials; ++i) {
-    uint64_t value = absl::Uniform(rng, std::numeric_limits<uint64_t>::min(),
-                                   std::numeric_limits<uint64_t>::max());
-    int shift = absl::Uniform(rng, -2 * std::numeric_limits<uint64_t>::digits,
-                              2 * std::numeric_limits<uint64_t>::digits);
-
-    EXPECT_EQ(rotl(value, shift), rotr(value, -shift));
-  }
-}
-
-TEST(Counting, LeadingZeroes) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CLZ
-  static_assert(countl_zero(uint8_t{}) == 8, "");
-  static_assert(countl_zero(static_cast<uint8_t>(-1)) == 0, "");
-  static_assert(countl_zero(uint16_t{}) == 16, "");
-  static_assert(countl_zero(static_cast<uint16_t>(-1)) == 0, "");
-  static_assert(countl_zero(uint32_t{}) == 32, "");
-  static_assert(countl_zero(~uint32_t{}) == 0, "");
-  static_assert(countl_zero(uint64_t{}) == 64, "");
-  static_assert(countl_zero(~uint64_t{}) == 0, "");
-#endif
-
-  EXPECT_EQ(countl_zero(uint8_t{}), 8);
-  EXPECT_EQ(countl_zero(static_cast<uint8_t>(-1)), 0);
-  EXPECT_EQ(countl_zero(uint16_t{}), 16);
-  EXPECT_EQ(countl_zero(static_cast<uint16_t>(-1)), 0);
-  EXPECT_EQ(countl_zero(uint32_t{}), 32);
-  EXPECT_EQ(countl_zero(~uint32_t{}), 0);
-  EXPECT_EQ(countl_zero(uint64_t{}), 64);
-  EXPECT_EQ(countl_zero(~uint64_t{}), 0);
-
-  for (int i = 0; i < 8; i++) {
-    EXPECT_EQ(countl_zero(static_cast<uint8_t>(1u << i)), 7 - i);
-  }
-
-  for (int i = 0; i < 16; i++) {
-    EXPECT_EQ(countl_zero(static_cast<uint16_t>(1u << i)), 15 - i);
-  }
-
-  for (int i = 0; i < 32; i++) {
-    EXPECT_EQ(countl_zero(uint32_t{1} << i), 31 - i);
-  }
-
-  for (int i = 0; i < 64; i++) {
-    EXPECT_EQ(countl_zero(uint64_t{1} << i), 63 - i);
-  }
-}
-
-TEST(Counting, LeadingOnes) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CLZ
-  static_assert(countl_one(uint8_t{}) == 0, "");
-  static_assert(countl_one(static_cast<uint8_t>(-1)) == 8, "");
-  static_assert(countl_one(uint16_t{}) == 0, "");
-  static_assert(countl_one(static_cast<uint16_t>(-1)) == 16, "");
-  static_assert(countl_one(uint32_t{}) == 0, "");
-  static_assert(countl_one(~uint32_t{}) == 32, "");
-  static_assert(countl_one(uint64_t{}) == 0, "");
-  static_assert(countl_one(~uint64_t{}) == 64, "");
-#endif
-
-  EXPECT_EQ(countl_one(uint8_t{}), 0);
-  EXPECT_EQ(countl_one(static_cast<uint8_t>(-1)), 8);
-  EXPECT_EQ(countl_one(uint16_t{}), 0);
-  EXPECT_EQ(countl_one(static_cast<uint16_t>(-1)), 16);
-  EXPECT_EQ(countl_one(uint32_t{}), 0);
-  EXPECT_EQ(countl_one(~uint32_t{}), 32);
-  EXPECT_EQ(countl_one(uint64_t{}), 0);
-  EXPECT_EQ(countl_one(~uint64_t{}), 64);
-}
-
-TEST(Counting, TrailingZeroes) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CTZ
-  static_assert(countr_zero(uint8_t{}) == 8, "");
-  static_assert(countr_zero(static_cast<uint8_t>(-1)) == 0, "");
-  static_assert(countr_zero(uint16_t{}) == 16, "");
-  static_assert(countr_zero(static_cast<uint16_t>(-1)) == 0, "");
-  static_assert(countr_zero(uint32_t{}) == 32, "");
-  static_assert(countr_zero(~uint32_t{}) == 0, "");
-  static_assert(countr_zero(uint64_t{}) == 64, "");
-  static_assert(countr_zero(~uint64_t{}) == 0, "");
-#endif
-
-  EXPECT_EQ(countr_zero(uint8_t{}), 8);
-  EXPECT_EQ(countr_zero(static_cast<uint8_t>(-1)), 0);
-  EXPECT_EQ(countr_zero(uint16_t{}), 16);
-  EXPECT_EQ(countr_zero(static_cast<uint16_t>(-1)), 0);
-  EXPECT_EQ(countr_zero(uint32_t{}), 32);
-  EXPECT_EQ(countr_zero(~uint32_t{}), 0);
-  EXPECT_EQ(countr_zero(uint64_t{}), 64);
-  EXPECT_EQ(countr_zero(~uint64_t{}), 0);
-}
-
-TEST(Counting, TrailingOnes) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CTZ
-  static_assert(countr_one(uint8_t{}) == 0, "");
-  static_assert(countr_one(static_cast<uint8_t>(-1)) == 8, "");
-  static_assert(countr_one(uint16_t{}) == 0, "");
-  static_assert(countr_one(static_cast<uint16_t>(-1)) == 16, "");
-  static_assert(countr_one(uint32_t{}) == 0, "");
-  static_assert(countr_one(~uint32_t{}) == 32, "");
-  static_assert(countr_one(uint64_t{}) == 0, "");
-  static_assert(countr_one(~uint64_t{}) == 64, "");
-#endif
-
-  EXPECT_EQ(countr_one(uint8_t{}), 0);
-  EXPECT_EQ(countr_one(static_cast<uint8_t>(-1)), 8);
-  EXPECT_EQ(countr_one(uint16_t{}), 0);
-  EXPECT_EQ(countr_one(static_cast<uint16_t>(-1)), 16);
-  EXPECT_EQ(countr_one(uint32_t{}), 0);
-  EXPECT_EQ(countr_one(~uint32_t{}), 32);
-  EXPECT_EQ(countr_one(uint64_t{}), 0);
-  EXPECT_EQ(countr_one(~uint64_t{}), 64);
-}
-
-TEST(Counting, Popcount) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_POPCOUNT
-  static_assert(popcount(uint8_t{}) == 0, "");
-  static_assert(popcount(uint8_t{1}) == 1, "");
-  static_assert(popcount(static_cast<uint8_t>(-1)) == 8, "");
-  static_assert(popcount(uint16_t{}) == 0, "");
-  static_assert(popcount(uint16_t{1}) == 1, "");
-  static_assert(popcount(static_cast<uint16_t>(-1)) == 16, "");
-  static_assert(popcount(uint32_t{}) == 0, "");
-  static_assert(popcount(uint32_t{1}) == 1, "");
-  static_assert(popcount(~uint32_t{}) == 32, "");
-  static_assert(popcount(uint64_t{}) == 0, "");
-  static_assert(popcount(uint64_t{1}) == 1, "");
-  static_assert(popcount(~uint64_t{}) == 64, "");
-#endif  // ABSL_INTERNAL_HAS_CONSTEXPR_POPCOUNT
-
-  EXPECT_EQ(popcount(uint8_t{}), 0);
-  EXPECT_EQ(popcount(uint8_t{1}), 1);
-  EXPECT_EQ(popcount(static_cast<uint8_t>(-1)), 8);
-  EXPECT_EQ(popcount(uint16_t{}), 0);
-  EXPECT_EQ(popcount(uint16_t{1}), 1);
-  EXPECT_EQ(popcount(static_cast<uint16_t>(-1)), 16);
-  EXPECT_EQ(popcount(uint32_t{}), 0);
-  EXPECT_EQ(popcount(uint32_t{1}), 1);
-  EXPECT_EQ(popcount(~uint32_t{}), 32);
-  EXPECT_EQ(popcount(uint64_t{}), 0);
-  EXPECT_EQ(popcount(uint64_t{1}), 1);
-  EXPECT_EQ(popcount(~uint64_t{}), 64);
-
-  for (int i = 0; i < 8; i++) {
-    EXPECT_EQ(popcount(static_cast<uint8_t>(uint8_t{1} << i)), 1);
-    EXPECT_EQ(popcount(static_cast<uint8_t>(static_cast<uint8_t>(-1) ^
-                                            (uint8_t{1} << i))),
-              7);
-  }
-
-  for (int i = 0; i < 16; i++) {
-    EXPECT_EQ(popcount(static_cast<uint16_t>(uint16_t{1} << i)), 1);
-    EXPECT_EQ(popcount(static_cast<uint16_t>(static_cast<uint16_t>(-1) ^
-                                             (uint16_t{1} << i))),
-              15);
-  }
-
-  for (int i = 0; i < 32; i++) {
-    EXPECT_EQ(popcount(uint32_t{1} << i), 1);
-    EXPECT_EQ(popcount(static_cast<uint32_t>(-1) ^ (uint32_t{1} << i)), 31);
-  }
-
-  for (int i = 0; i < 64; i++) {
-    EXPECT_EQ(popcount(uint64_t{1} << i), 1);
-    EXPECT_EQ(popcount(static_cast<uint64_t>(-1) ^ (uint64_t{1} << i)), 63);
-  }
-}
-
-template <typename T>
-struct PopcountInput {
-  T value = 0;
-  int expected = 0;
-};
-
-template <typename T>
-PopcountInput<T> GeneratePopcountInput(absl::BitGen& gen) {
-  PopcountInput<T> ret;
-  for (int i = 0; i < std::numeric_limits<T>::digits; i++) {
-    bool coin = absl::Bernoulli(gen, 0.2);
-    if (coin) {
-      ret.value |= T{1} << i;
-      ret.expected++;
-    }
-  }
-  return ret;
-}
-
-TEST(Counting, PopcountFuzz) {
-  absl::BitGen rng;
-  constexpr int kTrials = 100;
-
-  for (int i = 0; i < kTrials; ++i) {
-    auto input = GeneratePopcountInput<uint8_t>(rng);
-    EXPECT_EQ(popcount(input.value), input.expected);
-  }
-
-  for (int i = 0; i < kTrials; ++i) {
-    auto input = GeneratePopcountInput<uint16_t>(rng);
-    EXPECT_EQ(popcount(input.value), input.expected);
-  }
-
-  for (int i = 0; i < kTrials; ++i) {
-    auto input = GeneratePopcountInput<uint32_t>(rng);
-    EXPECT_EQ(popcount(input.value), input.expected);
-  }
-
-  for (int i = 0; i < kTrials; ++i) {
-    auto input = GeneratePopcountInput<uint64_t>(rng);
-    EXPECT_EQ(popcount(input.value), input.expected);
-  }
-}
-
-TEST(IntegralPowersOfTwo, SingleBit) {
-  EXPECT_FALSE(has_single_bit(uint8_t{}));
-  EXPECT_FALSE(has_single_bit(static_cast<uint8_t>(-1)));
-  EXPECT_FALSE(has_single_bit(uint16_t{}));
-  EXPECT_FALSE(has_single_bit(static_cast<uint16_t>(-1)));
-  EXPECT_FALSE(has_single_bit(uint32_t{}));
-  EXPECT_FALSE(has_single_bit(~uint32_t{}));
-  EXPECT_FALSE(has_single_bit(uint64_t{}));
-  EXPECT_FALSE(has_single_bit(~uint64_t{}));
-
-  static_assert(!has_single_bit(0u), "");
-  static_assert(has_single_bit(1u), "");
-  static_assert(has_single_bit(2u), "");
-  static_assert(!has_single_bit(3u), "");
-  static_assert(has_single_bit(4u), "");
-  static_assert(!has_single_bit(1337u), "");
-  static_assert(has_single_bit(65536u), "");
-  static_assert(has_single_bit(uint32_t{1} << 30), "");
-  static_assert(has_single_bit(uint64_t{1} << 42), "");
-
-  EXPECT_FALSE(has_single_bit(0u));
-  EXPECT_TRUE(has_single_bit(1u));
-  EXPECT_TRUE(has_single_bit(2u));
-  EXPECT_FALSE(has_single_bit(3u));
-  EXPECT_TRUE(has_single_bit(4u));
-  EXPECT_FALSE(has_single_bit(1337u));
-  EXPECT_TRUE(has_single_bit(65536u));
-  EXPECT_TRUE(has_single_bit(uint32_t{1} << 30));
-  EXPECT_TRUE(has_single_bit(uint64_t{1} << 42));
-
-  EXPECT_TRUE(has_single_bit(
-      static_cast<uint8_t>(std::numeric_limits<uint8_t>::max() / 2 + 1)));
-  EXPECT_TRUE(has_single_bit(
-      static_cast<uint16_t>(std::numeric_limits<uint16_t>::max() / 2 + 1)));
-  EXPECT_TRUE(has_single_bit(
-      static_cast<uint32_t>(std::numeric_limits<uint32_t>::max() / 2 + 1)));
-  EXPECT_TRUE(has_single_bit(
-      static_cast<uint64_t>(std::numeric_limits<uint64_t>::max() / 2 + 1)));
-}
-
-template <typename T, T arg, T = bit_ceil(arg)>
-bool IsBitCeilConstantExpression(int) {
-  return true;
-}
-template <typename T, T arg>
-bool IsBitCeilConstantExpression(char) {
-  return false;
-}
-
-TEST(IntegralPowersOfTwo, Ceiling) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CLZ
-  static_assert(bit_ceil(0u) == 1, "");
-  static_assert(bit_ceil(1u) == 1, "");
-  static_assert(bit_ceil(2u) == 2, "");
-  static_assert(bit_ceil(3u) == 4, "");
-  static_assert(bit_ceil(4u) == 4, "");
-  static_assert(bit_ceil(1337u) == 2048, "");
-  static_assert(bit_ceil(65536u) == 65536, "");
-  static_assert(bit_ceil(65536u - 1337u) == 65536, "");
-  static_assert(bit_ceil(uint32_t{0x80000000}) == uint32_t{0x80000000}, "");
-  static_assert(bit_ceil(uint64_t{0x40000000000}) == uint64_t{0x40000000000},
-                "");
-  static_assert(
-      bit_ceil(uint64_t{0x8000000000000000}) == uint64_t{0x8000000000000000},
-      "");
-
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint8_t, uint8_t{0x0}>(0)));
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint8_t, uint8_t{0x80}>(0)));
-  EXPECT_FALSE((IsBitCeilConstantExpression<uint8_t, uint8_t{0x81}>(0)));
-  EXPECT_FALSE((IsBitCeilConstantExpression<uint8_t, uint8_t{0xff}>(0)));
-
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint16_t, uint16_t{0x0}>(0)));
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint16_t, uint16_t{0x8000}>(0)));
-  EXPECT_FALSE((IsBitCeilConstantExpression<uint16_t, uint16_t{0x8001}>(0)));
-  EXPECT_FALSE((IsBitCeilConstantExpression<uint16_t, uint16_t{0xffff}>(0)));
-
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint32_t, uint32_t{0x0}>(0)));
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint32_t, uint32_t{0x80000000}>(0)));
-  EXPECT_FALSE(
-      (IsBitCeilConstantExpression<uint32_t, uint32_t{0x80000001}>(0)));
-  EXPECT_FALSE(
-      (IsBitCeilConstantExpression<uint32_t, uint32_t{0xffffffff}>(0)));
-
-  EXPECT_TRUE((IsBitCeilConstantExpression<uint64_t, uint64_t{0x0}>(0)));
-  EXPECT_TRUE(
-      (IsBitCeilConstantExpression<uint64_t, uint64_t{0x8000000000000000}>(0)));
-  EXPECT_FALSE(
-      (IsBitCeilConstantExpression<uint64_t, uint64_t{0x8000000000000001}>(0)));
-  EXPECT_FALSE(
-      (IsBitCeilConstantExpression<uint64_t, uint64_t{0xffffffffffffffff}>(0)));
-#endif
-
-  EXPECT_EQ(bit_ceil(0u), 1);
-  EXPECT_EQ(bit_ceil(1u), 1);
-  EXPECT_EQ(bit_ceil(2u), 2);
-  EXPECT_EQ(bit_ceil(3u), 4);
-  EXPECT_EQ(bit_ceil(4u), 4);
-  EXPECT_EQ(bit_ceil(1337u), 2048);
-  EXPECT_EQ(bit_ceil(65536u), 65536);
-  EXPECT_EQ(bit_ceil(65536u - 1337u), 65536);
-  EXPECT_EQ(bit_ceil(uint64_t{0x40000000000}), uint64_t{0x40000000000});
-}
-
-TEST(IntegralPowersOfTwo, Floor) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CLZ
-  static_assert(bit_floor(0u) == 0, "");
-  static_assert(bit_floor(1u) == 1, "");
-  static_assert(bit_floor(2u) == 2, "");
-  static_assert(bit_floor(3u) == 2, "");
-  static_assert(bit_floor(4u) == 4, "");
-  static_assert(bit_floor(1337u) == 1024, "");
-  static_assert(bit_floor(65536u) == 65536, "");
-  static_assert(bit_floor(65536u - 1337u) == 32768, "");
-  static_assert(bit_floor(uint64_t{0x40000000000}) == uint64_t{0x40000000000},
-                "");
-#endif
-
-  EXPECT_EQ(bit_floor(0u), 0);
-  EXPECT_EQ(bit_floor(1u), 1);
-  EXPECT_EQ(bit_floor(2u), 2);
-  EXPECT_EQ(bit_floor(3u), 2);
-  EXPECT_EQ(bit_floor(4u), 4);
-  EXPECT_EQ(bit_floor(1337u), 1024);
-  EXPECT_EQ(bit_floor(65536u), 65536);
-  EXPECT_EQ(bit_floor(65536u - 1337u), 32768);
-  EXPECT_EQ(bit_floor(uint64_t{0x40000000000}), uint64_t{0x40000000000});
-
-  for (int i = 0; i < 8; i++) {
-    uint8_t input = uint8_t{1} << i;
-    EXPECT_EQ(bit_floor(input), input);
-    if (i > 0) {
-      EXPECT_EQ(bit_floor(static_cast<uint8_t>(input + 1)), input);
-    }
-  }
-
-  for (int i = 0; i < 16; i++) {
-    uint16_t input = uint16_t{1} << i;
-    EXPECT_EQ(bit_floor(input), input);
-    if (i > 0) {
-      EXPECT_EQ(bit_floor(static_cast<uint16_t>(input + 1)), input);
-    }
-  }
-
-  for (int i = 0; i < 32; i++) {
-    uint32_t input = uint32_t{1} << i;
-    EXPECT_EQ(bit_floor(input), input);
-    if (i > 0) {
-      EXPECT_EQ(bit_floor(input + 1), input);
-    }
-  }
-
-  for (int i = 0; i < 64; i++) {
-    uint64_t input = uint64_t{1} << i;
-    EXPECT_EQ(bit_floor(input), input);
-    if (i > 0) {
-      EXPECT_EQ(bit_floor(input + 1), input);
-    }
-  }
-}
-
-TEST(IntegralPowersOfTwo, Width) {
-#if ABSL_INTERNAL_HAS_CONSTEXPR_CLZ
-  static_assert(bit_width(uint8_t{}) == 0, "");
-  static_assert(bit_width(uint8_t{1}) == 1, "");
-  static_assert(bit_width(uint8_t{3}) == 2, "");
-  static_assert(bit_width(static_cast<uint8_t>(-1)) == 8, "");
-  static_assert(bit_width(uint16_t{}) == 0, "");
-  static_assert(bit_width(uint16_t{1}) == 1, "");
-  static_assert(bit_width(uint16_t{3}) == 2, "");
-  static_assert(bit_width(static_cast<uint16_t>(-1)) == 16, "");
-  static_assert(bit_width(uint32_t{}) == 0, "");
-  static_assert(bit_width(uint32_t{1}) == 1, "");
-  static_assert(bit_width(uint32_t{3}) == 2, "");
-  static_assert(bit_width(~uint32_t{}) == 32, "");
-  static_assert(bit_width(uint64_t{}) == 0, "");
-  static_assert(bit_width(uint64_t{1}) == 1, "");
-  static_assert(bit_width(uint64_t{3}) == 2, "");
-  static_assert(bit_width(~uint64_t{}) == 64, "");
-#endif
-
-  EXPECT_EQ(bit_width(uint8_t{}), 0);
-  EXPECT_EQ(bit_width(uint8_t{1}), 1);
-  EXPECT_EQ(bit_width(uint8_t{3}), 2);
-  EXPECT_EQ(bit_width(static_cast<uint8_t>(-1)), 8);
-  EXPECT_EQ(bit_width(uint16_t{}), 0);
-  EXPECT_EQ(bit_width(uint16_t{1}), 1);
-  EXPECT_EQ(bit_width(uint16_t{3}), 2);
-  EXPECT_EQ(bit_width(static_cast<uint16_t>(-1)), 16);
-  EXPECT_EQ(bit_width(uint32_t{}), 0);
-  EXPECT_EQ(bit_width(uint32_t{1}), 1);
-  EXPECT_EQ(bit_width(uint32_t{3}), 2);
-  EXPECT_EQ(bit_width(~uint32_t{}), 32);
-  EXPECT_EQ(bit_width(uint64_t{}), 0);
-  EXPECT_EQ(bit_width(uint64_t{1}), 1);
-  EXPECT_EQ(bit_width(uint64_t{3}), 2);
-  EXPECT_EQ(bit_width(~uint64_t{}), 64);
-
-  for (int i = 0; i < 8; i++) {
-    EXPECT_EQ(bit_width(static_cast<uint8_t>(uint8_t{1} << i)), i + 1);
-  }
-
-  for (int i = 0; i < 16; i++) {
-    EXPECT_EQ(bit_width(static_cast<uint16_t>(uint16_t{1} << i)), i + 1);
-  }
-
-  for (int i = 0; i < 32; i++) {
-    EXPECT_EQ(bit_width(uint32_t{1} << i), i + 1);
-  }
-
-  for (int i = 0; i < 64; i++) {
-    EXPECT_EQ(bit_width(uint64_t{1} << i), i + 1);
-  }
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/numeric/int128.cc b/third_party/abseil/absl/numeric/int128.cc
deleted file mode 100644
index 5160df7..0000000
--- a/third_party/abseil/absl/numeric/int128.cc
+++ /dev/null
@@ -1,390 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/numeric/int128.h"
-
-#include <stddef.h>
-
-#include <cassert>
-#include <iomanip>
-#include <ostream>  // NOLINT(readability/streams)
-#include <sstream>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/optimization.h"
-#include "absl/numeric/bits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-ABSL_DLL const uint128 kuint128max = MakeUint128(
-    std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::max());
-
-namespace {
-
-// Returns the 0-based position of the last set bit (i.e., most significant bit)
-// in the given uint128. The argument is not 0.
-//
-// For example:
-//   Given: 5 (decimal) == 101 (binary)
-//   Returns: 2
-inline ABSL_ATTRIBUTE_ALWAYS_INLINE int Fls128(uint128 n) {
-  if (uint64_t hi = Uint128High64(n)) {
-    ABSL_INTERNAL_ASSUME(hi != 0);
-    return 127 - countl_zero(hi);
-  }
-  const uint64_t low = Uint128Low64(n);
-  ABSL_INTERNAL_ASSUME(low != 0);
-  return 63 - countl_zero(low);
-}
-
-// Long division/modulo for uint128 implemented using the shift-subtract
-// division algorithm adapted from:
-// https://stackoverflow.com/questions/5386377/division-without-using
-inline void DivModImpl(uint128 dividend, uint128 divisor, uint128* quotient_ret,
-                       uint128* remainder_ret) {
-  assert(divisor != 0);
-
-  if (divisor > dividend) {
-    *quotient_ret = 0;
-    *remainder_ret = dividend;
-    return;
-  }
-
-  if (divisor == dividend) {
-    *quotient_ret = 1;
-    *remainder_ret = 0;
-    return;
-  }
-
-  uint128 denominator = divisor;
-  uint128 quotient = 0;
-
-  // Left aligns the MSB of the denominator and the dividend.
-  const int shift = Fls128(dividend) - Fls128(denominator);
-  denominator <<= shift;
-
-  // Uses shift-subtract algorithm to divide dividend by denominator. The
-  // remainder will be left in dividend.
-  for (int i = 0; i <= shift; ++i) {
-    quotient <<= 1;
-    if (dividend >= denominator) {
-      dividend -= denominator;
-      quotient |= 1;
-    }
-    denominator >>= 1;
-  }
-
-  *quotient_ret = quotient;
-  *remainder_ret = dividend;
-}
-
-template <typename T>
-uint128 MakeUint128FromFloat(T v) {
-  static_assert(std::is_floating_point<T>::value, "");
-
-  // Rounding behavior is towards zero, same as for built-in types.
-
-  // Undefined behavior if v is NaN or cannot fit into uint128.
-  assert(std::isfinite(v) && v > -1 &&
-         (std::numeric_limits<T>::max_exponent <= 128 ||
-          v < std::ldexp(static_cast<T>(1), 128)));
-
-  if (v >= std::ldexp(static_cast<T>(1), 64)) {
-    uint64_t hi = static_cast<uint64_t>(std::ldexp(v, -64));
-    uint64_t lo = static_cast<uint64_t>(v - std::ldexp(static_cast<T>(hi), 64));
-    return MakeUint128(hi, lo);
-  }
-
-  return MakeUint128(0, static_cast<uint64_t>(v));
-}
-
-#if defined(__clang__) && !defined(__SSE3__)
-// Workaround for clang bug: https://bugs.llvm.org/show_bug.cgi?id=38289
-// Casting from long double to uint64_t is miscompiled and drops bits.
-// It is more work, so only use when we need the workaround.
-uint128 MakeUint128FromFloat(long double v) {
-  // Go 50 bits at a time, that fits in a double
-  static_assert(std::numeric_limits<double>::digits >= 50, "");
-  static_assert(std::numeric_limits<long double>::digits <= 150, "");
-  // Undefined behavior if v is not finite or cannot fit into uint128.
-  assert(std::isfinite(v) && v > -1 && v < std::ldexp(1.0L, 128));
-
-  v = std::ldexp(v, -100);
-  uint64_t w0 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
-  v = std::ldexp(v - static_cast<double>(w0), 50);
-  uint64_t w1 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
-  v = std::ldexp(v - static_cast<double>(w1), 50);
-  uint64_t w2 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
-  return (static_cast<uint128>(w0) << 100) | (static_cast<uint128>(w1) << 50) |
-         static_cast<uint128>(w2);
-}
-#endif  // __clang__ && !__SSE3__
-}  // namespace
-
-uint128::uint128(float v) : uint128(MakeUint128FromFloat(v)) {}
-uint128::uint128(double v) : uint128(MakeUint128FromFloat(v)) {}
-uint128::uint128(long double v) : uint128(MakeUint128FromFloat(v)) {}
-
-uint128 operator/(uint128 lhs, uint128 rhs) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  return static_cast<unsigned __int128>(lhs) /
-         static_cast<unsigned __int128>(rhs);
-#else  // ABSL_HAVE_INTRINSIC_INT128
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(lhs, rhs, &quotient, &remainder);
-  return quotient;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-}
-uint128 operator%(uint128 lhs, uint128 rhs) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  return static_cast<unsigned __int128>(lhs) %
-         static_cast<unsigned __int128>(rhs);
-#else  // ABSL_HAVE_INTRINSIC_INT128
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(lhs, rhs, &quotient, &remainder);
-  return remainder;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-}
-
-namespace {
-
-std::string Uint128ToFormattedString(uint128 v, std::ios_base::fmtflags flags) {
-  // Select a divisor which is the largest power of the base < 2^64.
-  uint128 div;
-  int div_base_log;
-  switch (flags & std::ios::basefield) {
-    case std::ios::hex:
-      div = 0x1000000000000000;  // 16^15
-      div_base_log = 15;
-      break;
-    case std::ios::oct:
-      div = 01000000000000000000000;  // 8^21
-      div_base_log = 21;
-      break;
-    default:  // std::ios::dec
-      div = 10000000000000000000u;  // 10^19
-      div_base_log = 19;
-      break;
-  }
-
-  // Now piece together the uint128 representation from three chunks of the
-  // original value, each less than "div" and therefore representable as a
-  // uint64_t.
-  std::ostringstream os;
-  std::ios_base::fmtflags copy_mask =
-      std::ios::basefield | std::ios::showbase | std::ios::uppercase;
-  os.setf(flags & copy_mask, copy_mask);
-  uint128 high = v;
-  uint128 low;
-  DivModImpl(high, div, &high, &low);
-  uint128 mid;
-  DivModImpl(high, div, &high, &mid);
-  if (Uint128Low64(high) != 0) {
-    os << Uint128Low64(high);
-    os << std::noshowbase << std::setfill('0') << std::setw(div_base_log);
-    os << Uint128Low64(mid);
-    os << std::setw(div_base_log);
-  } else if (Uint128Low64(mid) != 0) {
-    os << Uint128Low64(mid);
-    os << std::noshowbase << std::setfill('0') << std::setw(div_base_log);
-  }
-  os << Uint128Low64(low);
-  return os.str();
-}
-
-}  // namespace
-
-std::ostream& operator<<(std::ostream& os, uint128 v) {
-  std::ios_base::fmtflags flags = os.flags();
-  std::string rep = Uint128ToFormattedString(v, flags);
-
-  // Add the requisite padding.
-  std::streamsize width = os.width(0);
-  if (static_cast<size_t>(width) > rep.size()) {
-    std::ios::fmtflags adjustfield = flags & std::ios::adjustfield;
-    if (adjustfield == std::ios::left) {
-      rep.append(width - rep.size(), os.fill());
-    } else if (adjustfield == std::ios::internal &&
-               (flags & std::ios::showbase) &&
-               (flags & std::ios::basefield) == std::ios::hex && v != 0) {
-      rep.insert(2, width - rep.size(), os.fill());
-    } else {
-      rep.insert(0, width - rep.size(), os.fill());
-    }
-  }
-
-  return os << rep;
-}
-
-namespace {
-
-uint128 UnsignedAbsoluteValue(int128 v) {
-  // Cast to uint128 before possibly negating because -Int128Min() is undefined.
-  return Int128High64(v) < 0 ? -uint128(v) : uint128(v);
-}
-
-}  // namespace
-
-#if !defined(ABSL_HAVE_INTRINSIC_INT128)
-namespace {
-
-template <typename T>
-int128 MakeInt128FromFloat(T v) {
-  // Conversion when v is NaN or cannot fit into int128 would be undefined
-  // behavior if using an intrinsic 128-bit integer.
-  assert(std::isfinite(v) && (std::numeric_limits<T>::max_exponent <= 127 ||
-                              (v >= -std::ldexp(static_cast<T>(1), 127) &&
-                               v < std::ldexp(static_cast<T>(1), 127))));
-
-  // We must convert the absolute value and then negate as needed, because
-  // floating point types are typically sign-magnitude. Otherwise, the
-  // difference between the high and low 64 bits when interpreted as two's
-  // complement overwhelms the precision of the mantissa.
-  uint128 result = v < 0 ? -MakeUint128FromFloat(-v) : MakeUint128FromFloat(v);
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(result)),
-                    Uint128Low64(result));
-}
-
-}  // namespace
-
-int128::int128(float v) : int128(MakeInt128FromFloat(v)) {}
-int128::int128(double v) : int128(MakeInt128FromFloat(v)) {}
-int128::int128(long double v) : int128(MakeInt128FromFloat(v)) {}
-
-int128 operator/(int128 lhs, int128 rhs) {
-  assert(lhs != Int128Min() || rhs != -1);  // UB on two's complement.
-
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(UnsignedAbsoluteValue(lhs), UnsignedAbsoluteValue(rhs),
-             &quotient, &remainder);
-  if ((Int128High64(lhs) < 0) != (Int128High64(rhs) < 0)) quotient = -quotient;
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(quotient)),
-                    Uint128Low64(quotient));
-}
-
-int128 operator%(int128 lhs, int128 rhs) {
-  assert(lhs != Int128Min() || rhs != -1);  // UB on two's complement.
-
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(UnsignedAbsoluteValue(lhs), UnsignedAbsoluteValue(rhs),
-             &quotient, &remainder);
-  if (Int128High64(lhs) < 0) remainder = -remainder;
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(remainder)),
-                    Uint128Low64(remainder));
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-std::ostream& operator<<(std::ostream& os, int128 v) {
-  std::ios_base::fmtflags flags = os.flags();
-  std::string rep;
-
-  // Add the sign if needed.
-  bool print_as_decimal =
-      (flags & std::ios::basefield) == std::ios::dec ||
-      (flags & std::ios::basefield) == std::ios_base::fmtflags();
-  if (print_as_decimal) {
-    if (Int128High64(v) < 0) {
-      rep = "-";
-    } else if (flags & std::ios::showpos) {
-      rep = "+";
-    }
-  }
-
-  rep.append(Uint128ToFormattedString(
-      print_as_decimal ? UnsignedAbsoluteValue(v) : uint128(v), os.flags()));
-
-  // Add the requisite padding.
-  std::streamsize width = os.width(0);
-  if (static_cast<size_t>(width) > rep.size()) {
-    switch (flags & std::ios::adjustfield) {
-      case std::ios::left:
-        rep.append(width - rep.size(), os.fill());
-        break;
-      case std::ios::internal:
-        if (print_as_decimal && (rep[0] == '+' || rep[0] == '-')) {
-          rep.insert(1, width - rep.size(), os.fill());
-        } else if ((flags & std::ios::basefield) == std::ios::hex &&
-                   (flags & std::ios::showbase) && v != 0) {
-          rep.insert(2, width - rep.size(), os.fill());
-        } else {
-          rep.insert(0, width - rep.size(), os.fill());
-        }
-        break;
-      default:  // std::ios::right
-        rep.insert(0, width - rep.size(), os.fill());
-        break;
-    }
-  }
-
-  return os << rep;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace std {
-constexpr bool numeric_limits<absl::uint128>::is_specialized;
-constexpr bool numeric_limits<absl::uint128>::is_signed;
-constexpr bool numeric_limits<absl::uint128>::is_integer;
-constexpr bool numeric_limits<absl::uint128>::is_exact;
-constexpr bool numeric_limits<absl::uint128>::has_infinity;
-constexpr bool numeric_limits<absl::uint128>::has_quiet_NaN;
-constexpr bool numeric_limits<absl::uint128>::has_signaling_NaN;
-constexpr float_denorm_style numeric_limits<absl::uint128>::has_denorm;
-constexpr bool numeric_limits<absl::uint128>::has_denorm_loss;
-constexpr float_round_style numeric_limits<absl::uint128>::round_style;
-constexpr bool numeric_limits<absl::uint128>::is_iec559;
-constexpr bool numeric_limits<absl::uint128>::is_bounded;
-constexpr bool numeric_limits<absl::uint128>::is_modulo;
-constexpr int numeric_limits<absl::uint128>::digits;
-constexpr int numeric_limits<absl::uint128>::digits10;
-constexpr int numeric_limits<absl::uint128>::max_digits10;
-constexpr int numeric_limits<absl::uint128>::radix;
-constexpr int numeric_limits<absl::uint128>::min_exponent;
-constexpr int numeric_limits<absl::uint128>::min_exponent10;
-constexpr int numeric_limits<absl::uint128>::max_exponent;
-constexpr int numeric_limits<absl::uint128>::max_exponent10;
-constexpr bool numeric_limits<absl::uint128>::traps;
-constexpr bool numeric_limits<absl::uint128>::tinyness_before;
-
-constexpr bool numeric_limits<absl::int128>::is_specialized;
-constexpr bool numeric_limits<absl::int128>::is_signed;
-constexpr bool numeric_limits<absl::int128>::is_integer;
-constexpr bool numeric_limits<absl::int128>::is_exact;
-constexpr bool numeric_limits<absl::int128>::has_infinity;
-constexpr bool numeric_limits<absl::int128>::has_quiet_NaN;
-constexpr bool numeric_limits<absl::int128>::has_signaling_NaN;
-constexpr float_denorm_style numeric_limits<absl::int128>::has_denorm;
-constexpr bool numeric_limits<absl::int128>::has_denorm_loss;
-constexpr float_round_style numeric_limits<absl::int128>::round_style;
-constexpr bool numeric_limits<absl::int128>::is_iec559;
-constexpr bool numeric_limits<absl::int128>::is_bounded;
-constexpr bool numeric_limits<absl::int128>::is_modulo;
-constexpr int numeric_limits<absl::int128>::digits;
-constexpr int numeric_limits<absl::int128>::digits10;
-constexpr int numeric_limits<absl::int128>::max_digits10;
-constexpr int numeric_limits<absl::int128>::radix;
-constexpr int numeric_limits<absl::int128>::min_exponent;
-constexpr int numeric_limits<absl::int128>::min_exponent10;
-constexpr int numeric_limits<absl::int128>::max_exponent;
-constexpr int numeric_limits<absl::int128>::max_exponent10;
-constexpr bool numeric_limits<absl::int128>::traps;
-constexpr bool numeric_limits<absl::int128>::tinyness_before;
-}  // namespace std
diff --git a/third_party/abseil/absl/numeric/int128.h b/third_party/abseil/absl/numeric/int128.h
deleted file mode 100644
index 0dd814a..0000000
--- a/third_party/abseil/absl/numeric/int128.h
+++ /dev/null
@@ -1,1092 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: int128.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines 128-bit integer types, `uint128` and `int128`.
-
-#ifndef ABSL_NUMERIC_INT128_H_
-#define ABSL_NUMERIC_INT128_H_
-
-#include <cassert>
-#include <cmath>
-#include <cstdint>
-#include <cstring>
-#include <iosfwd>
-#include <limits>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-
-#if defined(_MSC_VER)
-// In very old versions of MSVC and when the /Zc:wchar_t flag is off, wchar_t is
-// a typedef for unsigned short.  Otherwise wchar_t is mapped to the __wchar_t
-// builtin type.  We need to make sure not to define operator wchar_t()
-// alongside operator unsigned short() in these instances.
-#define ABSL_INTERNAL_WCHAR_T __wchar_t
-#if defined(_M_X64)
-#include <intrin.h>
-#pragma intrinsic(_umul128)
-#endif  // defined(_M_X64)
-#else   // defined(_MSC_VER)
-#define ABSL_INTERNAL_WCHAR_T wchar_t
-#endif  // defined(_MSC_VER)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class int128;
-
-// uint128
-//
-// An unsigned 128-bit integer type. The API is meant to mimic an intrinsic type
-// as closely as is practical, including exhibiting undefined behavior in
-// analogous cases (e.g. division by zero). This type is intended to be a
-// drop-in replacement once C++ supports an intrinsic `uint128_t` type; when
-// that occurs, existing well-behaved uses of `uint128` will continue to work
-// using that new type.
-//
-// Note: code written with this type will continue to compile once `uint128_t`
-// is introduced, provided the replacement helper functions
-// `Uint128(Low|High)64()` and `MakeUint128()` are made.
-//
-// A `uint128` supports the following:
-//
-//   * Implicit construction from integral types
-//   * Explicit conversion to integral types
-//
-// Additionally, if your compiler supports `__int128`, `uint128` is
-// interoperable with that type. (Abseil checks for this compatibility through
-// the `ABSL_HAVE_INTRINSIC_INT128` macro.)
-//
-// However, a `uint128` differs from intrinsic integral types in the following
-// ways:
-//
-//   * Errors on implicit conversions that do not preserve value (such as
-//     loss of precision when converting to float values).
-//   * Requires explicit construction from and conversion to floating point
-//     types.
-//   * Conversion to integral types requires an explicit static_cast() to
-//     mimic use of the `-Wnarrowing` compiler flag.
-//   * The alignment requirement of `uint128` may differ from that of an
-//     intrinsic 128-bit integer type depending on platform and build
-//     configuration.
-//
-// Example:
-//
-//     float y = absl::Uint128Max();  // Error. uint128 cannot be implicitly
-//                                    // converted to float.
-//
-//     absl::uint128 v;
-//     uint64_t i = v;                         // Error
-//     uint64_t i = static_cast<uint64_t>(v);  // OK
-//
-class
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-    alignas(unsigned __int128)
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-        uint128 {
- public:
-  uint128() = default;
-
-  // Constructors from arithmetic types
-  constexpr uint128(int v);                 // NOLINT(runtime/explicit)
-  constexpr uint128(unsigned int v);        // NOLINT(runtime/explicit)
-  constexpr uint128(long v);                // NOLINT(runtime/int)
-  constexpr uint128(unsigned long v);       // NOLINT(runtime/int)
-  constexpr uint128(long long v);           // NOLINT(runtime/int)
-  constexpr uint128(unsigned long long v);  // NOLINT(runtime/int)
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  constexpr uint128(__int128 v);           // NOLINT(runtime/explicit)
-  constexpr uint128(unsigned __int128 v);  // NOLINT(runtime/explicit)
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  constexpr uint128(int128 v);  // NOLINT(runtime/explicit)
-  explicit uint128(float v);
-  explicit uint128(double v);
-  explicit uint128(long double v);
-
-  // Assignment operators from arithmetic types
-  uint128& operator=(int v);
-  uint128& operator=(unsigned int v);
-  uint128& operator=(long v);                // NOLINT(runtime/int)
-  uint128& operator=(unsigned long v);       // NOLINT(runtime/int)
-  uint128& operator=(long long v);           // NOLINT(runtime/int)
-  uint128& operator=(unsigned long long v);  // NOLINT(runtime/int)
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  uint128& operator=(__int128 v);
-  uint128& operator=(unsigned __int128 v);
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  uint128& operator=(int128 v);
-
-  // Conversion operators to other arithmetic types
-  constexpr explicit operator bool() const;
-  constexpr explicit operator char() const;
-  constexpr explicit operator signed char() const;
-  constexpr explicit operator unsigned char() const;
-  constexpr explicit operator char16_t() const;
-  constexpr explicit operator char32_t() const;
-  constexpr explicit operator ABSL_INTERNAL_WCHAR_T() const;
-  constexpr explicit operator short() const;  // NOLINT(runtime/int)
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator unsigned short() const;
-  constexpr explicit operator int() const;
-  constexpr explicit operator unsigned int() const;
-  constexpr explicit operator long() const;  // NOLINT(runtime/int)
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator unsigned long() const;
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator long long() const;
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator unsigned long long() const;
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  constexpr explicit operator __int128() const;
-  constexpr explicit operator unsigned __int128() const;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  explicit operator float() const;
-  explicit operator double() const;
-  explicit operator long double() const;
-
-  // Trivial copy constructor, assignment operator and destructor.
-
-  // Arithmetic operators.
-  uint128& operator+=(uint128 other);
-  uint128& operator-=(uint128 other);
-  uint128& operator*=(uint128 other);
-  // Long division/modulo for uint128.
-  uint128& operator/=(uint128 other);
-  uint128& operator%=(uint128 other);
-  uint128 operator++(int);
-  uint128 operator--(int);
-  uint128& operator<<=(int);
-  uint128& operator>>=(int);
-  uint128& operator&=(uint128 other);
-  uint128& operator|=(uint128 other);
-  uint128& operator^=(uint128 other);
-  uint128& operator++();
-  uint128& operator--();
-
-  // Uint128Low64()
-  //
-  // Returns the lower 64-bit value of a `uint128` value.
-  friend constexpr uint64_t Uint128Low64(uint128 v);
-
-  // Uint128High64()
-  //
-  // Returns the higher 64-bit value of a `uint128` value.
-  friend constexpr uint64_t Uint128High64(uint128 v);
-
-  // MakeUInt128()
-  //
-  // Constructs a `uint128` numeric value from two 64-bit unsigned integers.
-  // Note that this factory function is the only way to construct a `uint128`
-  // from integer values greater than 2^64.
-  //
-  // Example:
-  //
-  //   absl::uint128 big = absl::MakeUint128(1, 0);
-  friend constexpr uint128 MakeUint128(uint64_t high, uint64_t low);
-
-  // Uint128Max()
-  //
-  // Returns the highest value for a 128-bit unsigned integer.
-  friend constexpr uint128 Uint128Max();
-
-  // Support for absl::Hash.
-  template <typename H>
-  friend H AbslHashValue(H h, uint128 v) {
-    return H::combine(std::move(h), Uint128High64(v), Uint128Low64(v));
-  }
-
- private:
-  constexpr uint128(uint64_t high, uint64_t low);
-
-  // TODO(strel) Update implementation to use __int128 once all users of
-  // uint128 are fixed to not depend on alignof(uint128) == 8. Also add
-  // alignas(16) to class definition to keep alignment consistent across
-  // platforms.
-#if defined(ABSL_IS_LITTLE_ENDIAN)
-  uint64_t lo_;
-  uint64_t hi_;
-#elif defined(ABSL_IS_BIG_ENDIAN)
-  uint64_t hi_;
-  uint64_t lo_;
-#else  // byte order
-#error "Unsupported byte order: must be little-endian or big-endian."
-#endif  // byte order
-};
-
-// Prefer to use the constexpr `Uint128Max()`.
-//
-// TODO(absl-team) deprecate kuint128max once migration tool is released.
-ABSL_DLL extern const uint128 kuint128max;
-
-// allow uint128 to be logged
-std::ostream& operator<<(std::ostream& os, uint128 v);
-
-// TODO(strel) add operator>>(std::istream&, uint128)
-
-constexpr uint128 Uint128Max() {
-  return uint128((std::numeric_limits<uint64_t>::max)(),
-                 (std::numeric_limits<uint64_t>::max)());
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// Specialized numeric_limits for uint128.
-namespace std {
-template <>
-class numeric_limits<absl::uint128> {
- public:
-  static constexpr bool is_specialized = true;
-  static constexpr bool is_signed = false;
-  static constexpr bool is_integer = true;
-  static constexpr bool is_exact = true;
-  static constexpr bool has_infinity = false;
-  static constexpr bool has_quiet_NaN = false;
-  static constexpr bool has_signaling_NaN = false;
-  static constexpr float_denorm_style has_denorm = denorm_absent;
-  static constexpr bool has_denorm_loss = false;
-  static constexpr float_round_style round_style = round_toward_zero;
-  static constexpr bool is_iec559 = false;
-  static constexpr bool is_bounded = true;
-  static constexpr bool is_modulo = true;
-  static constexpr int digits = 128;
-  static constexpr int digits10 = 38;
-  static constexpr int max_digits10 = 0;
-  static constexpr int radix = 2;
-  static constexpr int min_exponent = 0;
-  static constexpr int min_exponent10 = 0;
-  static constexpr int max_exponent = 0;
-  static constexpr int max_exponent10 = 0;
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  static constexpr bool traps = numeric_limits<unsigned __int128>::traps;
-#else   // ABSL_HAVE_INTRINSIC_INT128
-  static constexpr bool traps = numeric_limits<uint64_t>::traps;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  static constexpr bool tinyness_before = false;
-
-  static constexpr absl::uint128 (min)() { return 0; }
-  static constexpr absl::uint128 lowest() { return 0; }
-  static constexpr absl::uint128 (max)() { return absl::Uint128Max(); }
-  static constexpr absl::uint128 epsilon() { return 0; }
-  static constexpr absl::uint128 round_error() { return 0; }
-  static constexpr absl::uint128 infinity() { return 0; }
-  static constexpr absl::uint128 quiet_NaN() { return 0; }
-  static constexpr absl::uint128 signaling_NaN() { return 0; }
-  static constexpr absl::uint128 denorm_min() { return 0; }
-};
-}  // namespace std
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// int128
-//
-// A signed 128-bit integer type. The API is meant to mimic an intrinsic
-// integral type as closely as is practical, including exhibiting undefined
-// behavior in analogous cases (e.g. division by zero).
-//
-// An `int128` supports the following:
-//
-//   * Implicit construction from integral types
-//   * Explicit conversion to integral types
-//
-// However, an `int128` differs from intrinsic integral types in the following
-// ways:
-//
-//   * It is not implicitly convertible to other integral types.
-//   * Requires explicit construction from and conversion to floating point
-//     types.
-
-// Additionally, if your compiler supports `__int128`, `int128` is
-// interoperable with that type. (Abseil checks for this compatibility through
-// the `ABSL_HAVE_INTRINSIC_INT128` macro.)
-//
-// The design goal for `int128` is that it will be compatible with a future
-// `int128_t`, if that type becomes a part of the standard.
-//
-// Example:
-//
-//     float y = absl::int128(17);  // Error. int128 cannot be implicitly
-//                                  // converted to float.
-//
-//     absl::int128 v;
-//     int64_t i = v;                        // Error
-//     int64_t i = static_cast<int64_t>(v);  // OK
-//
-class int128 {
- public:
-  int128() = default;
-
-  // Constructors from arithmetic types
-  constexpr int128(int v);                 // NOLINT(runtime/explicit)
-  constexpr int128(unsigned int v);        // NOLINT(runtime/explicit)
-  constexpr int128(long v);                // NOLINT(runtime/int)
-  constexpr int128(unsigned long v);       // NOLINT(runtime/int)
-  constexpr int128(long long v);           // NOLINT(runtime/int)
-  constexpr int128(unsigned long long v);  // NOLINT(runtime/int)
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  constexpr int128(__int128 v);  // NOLINT(runtime/explicit)
-  constexpr explicit int128(unsigned __int128 v);
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  constexpr explicit int128(uint128 v);
-  explicit int128(float v);
-  explicit int128(double v);
-  explicit int128(long double v);
-
-  // Assignment operators from arithmetic types
-  int128& operator=(int v);
-  int128& operator=(unsigned int v);
-  int128& operator=(long v);                // NOLINT(runtime/int)
-  int128& operator=(unsigned long v);       // NOLINT(runtime/int)
-  int128& operator=(long long v);           // NOLINT(runtime/int)
-  int128& operator=(unsigned long long v);  // NOLINT(runtime/int)
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  int128& operator=(__int128 v);
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-  // Conversion operators to other arithmetic types
-  constexpr explicit operator bool() const;
-  constexpr explicit operator char() const;
-  constexpr explicit operator signed char() const;
-  constexpr explicit operator unsigned char() const;
-  constexpr explicit operator char16_t() const;
-  constexpr explicit operator char32_t() const;
-  constexpr explicit operator ABSL_INTERNAL_WCHAR_T() const;
-  constexpr explicit operator short() const;  // NOLINT(runtime/int)
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator unsigned short() const;
-  constexpr explicit operator int() const;
-  constexpr explicit operator unsigned int() const;
-  constexpr explicit operator long() const;  // NOLINT(runtime/int)
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator unsigned long() const;
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator long long() const;
-  // NOLINTNEXTLINE(runtime/int)
-  constexpr explicit operator unsigned long long() const;
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  constexpr explicit operator __int128() const;
-  constexpr explicit operator unsigned __int128() const;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  explicit operator float() const;
-  explicit operator double() const;
-  explicit operator long double() const;
-
-  // Trivial copy constructor, assignment operator and destructor.
-
-  // Arithmetic operators
-  int128& operator+=(int128 other);
-  int128& operator-=(int128 other);
-  int128& operator*=(int128 other);
-  int128& operator/=(int128 other);
-  int128& operator%=(int128 other);
-  int128 operator++(int);  // postfix increment: i++
-  int128 operator--(int);  // postfix decrement: i--
-  int128& operator++();    // prefix increment:  ++i
-  int128& operator--();    // prefix decrement:  --i
-  int128& operator&=(int128 other);
-  int128& operator|=(int128 other);
-  int128& operator^=(int128 other);
-  int128& operator<<=(int amount);
-  int128& operator>>=(int amount);
-
-  // Int128Low64()
-  //
-  // Returns the lower 64-bit value of a `int128` value.
-  friend constexpr uint64_t Int128Low64(int128 v);
-
-  // Int128High64()
-  //
-  // Returns the higher 64-bit value of a `int128` value.
-  friend constexpr int64_t Int128High64(int128 v);
-
-  // MakeInt128()
-  //
-  // Constructs a `int128` numeric value from two 64-bit integers. Note that
-  // signedness is conveyed in the upper `high` value.
-  //
-  //   (absl::int128(1) << 64) * high + low
-  //
-  // Note that this factory function is the only way to construct a `int128`
-  // from integer values greater than 2^64 or less than -2^64.
-  //
-  // Example:
-  //
-  //   absl::int128 big = absl::MakeInt128(1, 0);
-  //   absl::int128 big_n = absl::MakeInt128(-1, 0);
-  friend constexpr int128 MakeInt128(int64_t high, uint64_t low);
-
-  // Int128Max()
-  //
-  // Returns the maximum value for a 128-bit signed integer.
-  friend constexpr int128 Int128Max();
-
-  // Int128Min()
-  //
-  // Returns the minimum value for a 128-bit signed integer.
-  friend constexpr int128 Int128Min();
-
-  // Support for absl::Hash.
-  template <typename H>
-  friend H AbslHashValue(H h, int128 v) {
-    return H::combine(std::move(h), Int128High64(v), Int128Low64(v));
-  }
-
- private:
-  constexpr int128(int64_t high, uint64_t low);
-
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  __int128 v_;
-#else  // ABSL_HAVE_INTRINSIC_INT128
-#if defined(ABSL_IS_LITTLE_ENDIAN)
-  uint64_t lo_;
-  int64_t hi_;
-#elif defined(ABSL_IS_BIG_ENDIAN)
-  int64_t hi_;
-  uint64_t lo_;
-#else  // byte order
-#error "Unsupported byte order: must be little-endian or big-endian."
-#endif  // byte order
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-};
-
-std::ostream& operator<<(std::ostream& os, int128 v);
-
-// TODO(absl-team) add operator>>(std::istream&, int128)
-
-constexpr int128 Int128Max() {
-  return int128((std::numeric_limits<int64_t>::max)(),
-                (std::numeric_limits<uint64_t>::max)());
-}
-
-constexpr int128 Int128Min() {
-  return int128((std::numeric_limits<int64_t>::min)(), 0);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// Specialized numeric_limits for int128.
-namespace std {
-template <>
-class numeric_limits<absl::int128> {
- public:
-  static constexpr bool is_specialized = true;
-  static constexpr bool is_signed = true;
-  static constexpr bool is_integer = true;
-  static constexpr bool is_exact = true;
-  static constexpr bool has_infinity = false;
-  static constexpr bool has_quiet_NaN = false;
-  static constexpr bool has_signaling_NaN = false;
-  static constexpr float_denorm_style has_denorm = denorm_absent;
-  static constexpr bool has_denorm_loss = false;
-  static constexpr float_round_style round_style = round_toward_zero;
-  static constexpr bool is_iec559 = false;
-  static constexpr bool is_bounded = true;
-  static constexpr bool is_modulo = false;
-  static constexpr int digits = 127;
-  static constexpr int digits10 = 38;
-  static constexpr int max_digits10 = 0;
-  static constexpr int radix = 2;
-  static constexpr int min_exponent = 0;
-  static constexpr int min_exponent10 = 0;
-  static constexpr int max_exponent = 0;
-  static constexpr int max_exponent10 = 0;
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  static constexpr bool traps = numeric_limits<__int128>::traps;
-#else   // ABSL_HAVE_INTRINSIC_INT128
-  static constexpr bool traps = numeric_limits<uint64_t>::traps;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-  static constexpr bool tinyness_before = false;
-
-  static constexpr absl::int128 (min)() { return absl::Int128Min(); }
-  static constexpr absl::int128 lowest() { return absl::Int128Min(); }
-  static constexpr absl::int128 (max)() { return absl::Int128Max(); }
-  static constexpr absl::int128 epsilon() { return 0; }
-  static constexpr absl::int128 round_error() { return 0; }
-  static constexpr absl::int128 infinity() { return 0; }
-  static constexpr absl::int128 quiet_NaN() { return 0; }
-  static constexpr absl::int128 signaling_NaN() { return 0; }
-  static constexpr absl::int128 denorm_min() { return 0; }
-};
-}  // namespace std
-
-// --------------------------------------------------------------------------
-//                      Implementation details follow
-// --------------------------------------------------------------------------
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-constexpr uint128 MakeUint128(uint64_t high, uint64_t low) {
-  return uint128(high, low);
-}
-
-// Assignment from integer types.
-
-inline uint128& uint128::operator=(int v) { return *this = uint128(v); }
-
-inline uint128& uint128::operator=(unsigned int v) {
-  return *this = uint128(v);
-}
-
-inline uint128& uint128::operator=(long v) {  // NOLINT(runtime/int)
-  return *this = uint128(v);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-inline uint128& uint128::operator=(unsigned long v) {
-  return *this = uint128(v);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-inline uint128& uint128::operator=(long long v) {
-  return *this = uint128(v);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-inline uint128& uint128::operator=(unsigned long long v) {
-  return *this = uint128(v);
-}
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-inline uint128& uint128::operator=(__int128 v) {
-  return *this = uint128(v);
-}
-
-inline uint128& uint128::operator=(unsigned __int128 v) {
-  return *this = uint128(v);
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-inline uint128& uint128::operator=(int128 v) {
-  return *this = uint128(v);
-}
-
-// Arithmetic operators.
-
-uint128 operator<<(uint128 lhs, int amount);
-uint128 operator>>(uint128 lhs, int amount);
-uint128 operator+(uint128 lhs, uint128 rhs);
-uint128 operator-(uint128 lhs, uint128 rhs);
-uint128 operator*(uint128 lhs, uint128 rhs);
-uint128 operator/(uint128 lhs, uint128 rhs);
-uint128 operator%(uint128 lhs, uint128 rhs);
-
-inline uint128& uint128::operator<<=(int amount) {
-  *this = *this << amount;
-  return *this;
-}
-
-inline uint128& uint128::operator>>=(int amount) {
-  *this = *this >> amount;
-  return *this;
-}
-
-inline uint128& uint128::operator+=(uint128 other) {
-  *this = *this + other;
-  return *this;
-}
-
-inline uint128& uint128::operator-=(uint128 other) {
-  *this = *this - other;
-  return *this;
-}
-
-inline uint128& uint128::operator*=(uint128 other) {
-  *this = *this * other;
-  return *this;
-}
-
-inline uint128& uint128::operator/=(uint128 other) {
-  *this = *this / other;
-  return *this;
-}
-
-inline uint128& uint128::operator%=(uint128 other) {
-  *this = *this % other;
-  return *this;
-}
-
-constexpr uint64_t Uint128Low64(uint128 v) { return v.lo_; }
-
-constexpr uint64_t Uint128High64(uint128 v) { return v.hi_; }
-
-// Constructors from integer types.
-
-#if defined(ABSL_IS_LITTLE_ENDIAN)
-
-constexpr uint128::uint128(uint64_t high, uint64_t low)
-    : lo_{low}, hi_{high} {}
-
-constexpr uint128::uint128(int v)
-    : lo_{static_cast<uint64_t>(v)},
-      hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0} {}
-constexpr uint128::uint128(long v)  // NOLINT(runtime/int)
-    : lo_{static_cast<uint64_t>(v)},
-      hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0} {}
-constexpr uint128::uint128(long long v)  // NOLINT(runtime/int)
-    : lo_{static_cast<uint64_t>(v)},
-      hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0} {}
-
-constexpr uint128::uint128(unsigned int v) : lo_{v}, hi_{0} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr uint128::uint128(unsigned long v) : lo_{v}, hi_{0} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr uint128::uint128(unsigned long long v) : lo_{v}, hi_{0} {}
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-constexpr uint128::uint128(__int128 v)
-    : lo_{static_cast<uint64_t>(v & ~uint64_t{0})},
-      hi_{static_cast<uint64_t>(static_cast<unsigned __int128>(v) >> 64)} {}
-constexpr uint128::uint128(unsigned __int128 v)
-    : lo_{static_cast<uint64_t>(v & ~uint64_t{0})},
-      hi_{static_cast<uint64_t>(v >> 64)} {}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-constexpr uint128::uint128(int128 v)
-    : lo_{Int128Low64(v)}, hi_{static_cast<uint64_t>(Int128High64(v))} {}
-
-#elif defined(ABSL_IS_BIG_ENDIAN)
-
-constexpr uint128::uint128(uint64_t high, uint64_t low)
-    : hi_{high}, lo_{low} {}
-
-constexpr uint128::uint128(int v)
-    : hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0},
-      lo_{static_cast<uint64_t>(v)} {}
-constexpr uint128::uint128(long v)  // NOLINT(runtime/int)
-    : hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0},
-      lo_{static_cast<uint64_t>(v)} {}
-constexpr uint128::uint128(long long v)  // NOLINT(runtime/int)
-    : hi_{v < 0 ? (std::numeric_limits<uint64_t>::max)() : 0},
-      lo_{static_cast<uint64_t>(v)} {}
-
-constexpr uint128::uint128(unsigned int v) : hi_{0}, lo_{v} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr uint128::uint128(unsigned long v) : hi_{0}, lo_{v} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr uint128::uint128(unsigned long long v) : hi_{0}, lo_{v} {}
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-constexpr uint128::uint128(__int128 v)
-    : hi_{static_cast<uint64_t>(static_cast<unsigned __int128>(v) >> 64)},
-      lo_{static_cast<uint64_t>(v & ~uint64_t{0})} {}
-constexpr uint128::uint128(unsigned __int128 v)
-    : hi_{static_cast<uint64_t>(v >> 64)},
-      lo_{static_cast<uint64_t>(v & ~uint64_t{0})} {}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-constexpr uint128::uint128(int128 v)
-    : hi_{static_cast<uint64_t>(Int128High64(v))}, lo_{Int128Low64(v)} {}
-
-#else  // byte order
-#error "Unsupported byte order: must be little-endian or big-endian."
-#endif  // byte order
-
-// Conversion operators to integer types.
-
-constexpr uint128::operator bool() const { return lo_ || hi_; }
-
-constexpr uint128::operator char() const { return static_cast<char>(lo_); }
-
-constexpr uint128::operator signed char() const {
-  return static_cast<signed char>(lo_);
-}
-
-constexpr uint128::operator unsigned char() const {
-  return static_cast<unsigned char>(lo_);
-}
-
-constexpr uint128::operator char16_t() const {
-  return static_cast<char16_t>(lo_);
-}
-
-constexpr uint128::operator char32_t() const {
-  return static_cast<char32_t>(lo_);
-}
-
-constexpr uint128::operator ABSL_INTERNAL_WCHAR_T() const {
-  return static_cast<ABSL_INTERNAL_WCHAR_T>(lo_);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-constexpr uint128::operator short() const { return static_cast<short>(lo_); }
-
-constexpr uint128::operator unsigned short() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned short>(lo_);            // NOLINT(runtime/int)
-}
-
-constexpr uint128::operator int() const { return static_cast<int>(lo_); }
-
-constexpr uint128::operator unsigned int() const {
-  return static_cast<unsigned int>(lo_);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-constexpr uint128::operator long() const { return static_cast<long>(lo_); }
-
-constexpr uint128::operator unsigned long() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned long>(lo_);            // NOLINT(runtime/int)
-}
-
-constexpr uint128::operator long long() const {  // NOLINT(runtime/int)
-  return static_cast<long long>(lo_);            // NOLINT(runtime/int)
-}
-
-constexpr uint128::operator unsigned long long() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned long long>(lo_);            // NOLINT(runtime/int)
-}
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-constexpr uint128::operator __int128() const {
-  return (static_cast<__int128>(hi_) << 64) + lo_;
-}
-
-constexpr uint128::operator unsigned __int128() const {
-  return (static_cast<unsigned __int128>(hi_) << 64) + lo_;
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-// Conversion operators to floating point types.
-
-inline uint128::operator float() const {
-  return static_cast<float>(lo_) + std::ldexp(static_cast<float>(hi_), 64);
-}
-
-inline uint128::operator double() const {
-  return static_cast<double>(lo_) + std::ldexp(static_cast<double>(hi_), 64);
-}
-
-inline uint128::operator long double() const {
-  return static_cast<long double>(lo_) +
-         std::ldexp(static_cast<long double>(hi_), 64);
-}
-
-// Comparison operators.
-
-inline bool operator==(uint128 lhs, uint128 rhs) {
-  return (Uint128Low64(lhs) == Uint128Low64(rhs) &&
-          Uint128High64(lhs) == Uint128High64(rhs));
-}
-
-inline bool operator!=(uint128 lhs, uint128 rhs) {
-  return !(lhs == rhs);
-}
-
-inline bool operator<(uint128 lhs, uint128 rhs) {
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  return static_cast<unsigned __int128>(lhs) <
-         static_cast<unsigned __int128>(rhs);
-#else
-  return (Uint128High64(lhs) == Uint128High64(rhs))
-             ? (Uint128Low64(lhs) < Uint128Low64(rhs))
-             : (Uint128High64(lhs) < Uint128High64(rhs));
-#endif
-}
-
-inline bool operator>(uint128 lhs, uint128 rhs) { return rhs < lhs; }
-
-inline bool operator<=(uint128 lhs, uint128 rhs) { return !(rhs < lhs); }
-
-inline bool operator>=(uint128 lhs, uint128 rhs) { return !(lhs < rhs); }
-
-// Unary operators.
-
-inline uint128 operator-(uint128 val) {
-  uint64_t hi = ~Uint128High64(val);
-  uint64_t lo = ~Uint128Low64(val) + 1;
-  if (lo == 0) ++hi;  // carry
-  return MakeUint128(hi, lo);
-}
-
-inline bool operator!(uint128 val) {
-  return !Uint128High64(val) && !Uint128Low64(val);
-}
-
-// Logical operators.
-
-inline uint128 operator~(uint128 val) {
-  return MakeUint128(~Uint128High64(val), ~Uint128Low64(val));
-}
-
-inline uint128 operator|(uint128 lhs, uint128 rhs) {
-  return MakeUint128(Uint128High64(lhs) | Uint128High64(rhs),
-                           Uint128Low64(lhs) | Uint128Low64(rhs));
-}
-
-inline uint128 operator&(uint128 lhs, uint128 rhs) {
-  return MakeUint128(Uint128High64(lhs) & Uint128High64(rhs),
-                           Uint128Low64(lhs) & Uint128Low64(rhs));
-}
-
-inline uint128 operator^(uint128 lhs, uint128 rhs) {
-  return MakeUint128(Uint128High64(lhs) ^ Uint128High64(rhs),
-                           Uint128Low64(lhs) ^ Uint128Low64(rhs));
-}
-
-inline uint128& uint128::operator|=(uint128 other) {
-  hi_ |= other.hi_;
-  lo_ |= other.lo_;
-  return *this;
-}
-
-inline uint128& uint128::operator&=(uint128 other) {
-  hi_ &= other.hi_;
-  lo_ &= other.lo_;
-  return *this;
-}
-
-inline uint128& uint128::operator^=(uint128 other) {
-  hi_ ^= other.hi_;
-  lo_ ^= other.lo_;
-  return *this;
-}
-
-// Arithmetic operators.
-
-inline uint128 operator<<(uint128 lhs, int amount) {
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  return static_cast<unsigned __int128>(lhs) << amount;
-#else
-  // uint64_t shifts of >= 64 are undefined, so we will need some
-  // special-casing.
-  if (amount < 64) {
-    if (amount != 0) {
-      return MakeUint128(
-          (Uint128High64(lhs) << amount) | (Uint128Low64(lhs) >> (64 - amount)),
-          Uint128Low64(lhs) << amount);
-    }
-    return lhs;
-  }
-  return MakeUint128(Uint128Low64(lhs) << (amount - 64), 0);
-#endif
-}
-
-inline uint128 operator>>(uint128 lhs, int amount) {
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  return static_cast<unsigned __int128>(lhs) >> amount;
-#else
-  // uint64_t shifts of >= 64 are undefined, so we will need some
-  // special-casing.
-  if (amount < 64) {
-    if (amount != 0) {
-      return MakeUint128(Uint128High64(lhs) >> amount,
-                         (Uint128Low64(lhs) >> amount) |
-                             (Uint128High64(lhs) << (64 - amount)));
-    }
-    return lhs;
-  }
-  return MakeUint128(0, Uint128High64(lhs) >> (amount - 64));
-#endif
-}
-
-inline uint128 operator+(uint128 lhs, uint128 rhs) {
-  uint128 result = MakeUint128(Uint128High64(lhs) + Uint128High64(rhs),
-                               Uint128Low64(lhs) + Uint128Low64(rhs));
-  if (Uint128Low64(result) < Uint128Low64(lhs)) {  // check for carry
-    return MakeUint128(Uint128High64(result) + 1, Uint128Low64(result));
-  }
-  return result;
-}
-
-inline uint128 operator-(uint128 lhs, uint128 rhs) {
-  uint128 result = MakeUint128(Uint128High64(lhs) - Uint128High64(rhs),
-                               Uint128Low64(lhs) - Uint128Low64(rhs));
-  if (Uint128Low64(lhs) < Uint128Low64(rhs)) {  // check for carry
-    return MakeUint128(Uint128High64(result) - 1, Uint128Low64(result));
-  }
-  return result;
-}
-
-inline uint128 operator*(uint128 lhs, uint128 rhs) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  // TODO(strel) Remove once alignment issues are resolved and unsigned __int128
-  // can be used for uint128 storage.
-  return static_cast<unsigned __int128>(lhs) *
-         static_cast<unsigned __int128>(rhs);
-#elif defined(_MSC_VER) && defined(_M_X64)
-  uint64_t carry;
-  uint64_t low = _umul128(Uint128Low64(lhs), Uint128Low64(rhs), &carry);
-  return MakeUint128(Uint128Low64(lhs) * Uint128High64(rhs) +
-                         Uint128High64(lhs) * Uint128Low64(rhs) + carry,
-                     low);
-#else   // ABSL_HAVE_INTRINSIC128
-  uint64_t a32 = Uint128Low64(lhs) >> 32;
-  uint64_t a00 = Uint128Low64(lhs) & 0xffffffff;
-  uint64_t b32 = Uint128Low64(rhs) >> 32;
-  uint64_t b00 = Uint128Low64(rhs) & 0xffffffff;
-  uint128 result =
-      MakeUint128(Uint128High64(lhs) * Uint128Low64(rhs) +
-                      Uint128Low64(lhs) * Uint128High64(rhs) + a32 * b32,
-                  a00 * b00);
-  result += uint128(a32 * b00) << 32;
-  result += uint128(a00 * b32) << 32;
-  return result;
-#endif  // ABSL_HAVE_INTRINSIC128
-}
-
-// Increment/decrement operators.
-
-inline uint128 uint128::operator++(int) {
-  uint128 tmp(*this);
-  *this += 1;
-  return tmp;
-}
-
-inline uint128 uint128::operator--(int) {
-  uint128 tmp(*this);
-  *this -= 1;
-  return tmp;
-}
-
-inline uint128& uint128::operator++() {
-  *this += 1;
-  return *this;
-}
-
-inline uint128& uint128::operator--() {
-  *this -= 1;
-  return *this;
-}
-
-constexpr int128 MakeInt128(int64_t high, uint64_t low) {
-  return int128(high, low);
-}
-
-// Assignment from integer types.
-inline int128& int128::operator=(int v) {
-  return *this = int128(v);
-}
-
-inline int128& int128::operator=(unsigned int v) {
-  return *this = int128(v);
-}
-
-inline int128& int128::operator=(long v) {  // NOLINT(runtime/int)
-  return *this = int128(v);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-inline int128& int128::operator=(unsigned long v) {
-  return *this = int128(v);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-inline int128& int128::operator=(long long v) {
-  return *this = int128(v);
-}
-
-// NOLINTNEXTLINE(runtime/int)
-inline int128& int128::operator=(unsigned long long v) {
-  return *this = int128(v);
-}
-
-// Arithmetic operators.
-
-int128 operator+(int128 lhs, int128 rhs);
-int128 operator-(int128 lhs, int128 rhs);
-int128 operator*(int128 lhs, int128 rhs);
-int128 operator/(int128 lhs, int128 rhs);
-int128 operator%(int128 lhs, int128 rhs);
-int128 operator|(int128 lhs, int128 rhs);
-int128 operator&(int128 lhs, int128 rhs);
-int128 operator^(int128 lhs, int128 rhs);
-int128 operator<<(int128 lhs, int amount);
-int128 operator>>(int128 lhs, int amount);
-
-inline int128& int128::operator+=(int128 other) {
-  *this = *this + other;
-  return *this;
-}
-
-inline int128& int128::operator-=(int128 other) {
-  *this = *this - other;
-  return *this;
-}
-
-inline int128& int128::operator*=(int128 other) {
-  *this = *this * other;
-  return *this;
-}
-
-inline int128& int128::operator/=(int128 other) {
-  *this = *this / other;
-  return *this;
-}
-
-inline int128& int128::operator%=(int128 other) {
-  *this = *this % other;
-  return *this;
-}
-
-inline int128& int128::operator|=(int128 other) {
-  *this = *this | other;
-  return *this;
-}
-
-inline int128& int128::operator&=(int128 other) {
-  *this = *this & other;
-  return *this;
-}
-
-inline int128& int128::operator^=(int128 other) {
-  *this = *this ^ other;
-  return *this;
-}
-
-inline int128& int128::operator<<=(int amount) {
-  *this = *this << amount;
-  return *this;
-}
-
-inline int128& int128::operator>>=(int amount) {
-  *this = *this >> amount;
-  return *this;
-}
-
-namespace int128_internal {
-
-// Casts from unsigned to signed while preserving the underlying binary
-// representation.
-constexpr int64_t BitCastToSigned(uint64_t v) {
-  // Casting an unsigned integer to a signed integer of the same
-  // width is implementation defined behavior if the source value would not fit
-  // in the destination type. We step around it with a roundtrip bitwise not
-  // operation to make sure this function remains constexpr. Clang, GCC, and
-  // MSVC optimize this to a no-op on x86-64.
-  return v & (uint64_t{1} << 63) ? ~static_cast<int64_t>(~v)
-                                 : static_cast<int64_t>(v);
-}
-
-}  // namespace int128_internal
-
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-#include "absl/numeric/int128_have_intrinsic.inc"  // IWYU pragma: export
-#else  // ABSL_HAVE_INTRINSIC_INT128
-#include "absl/numeric/int128_no_intrinsic.inc"  // IWYU pragma: export
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef ABSL_INTERNAL_WCHAR_T
-
-#endif  // ABSL_NUMERIC_INT128_H_
diff --git a/third_party/abseil/absl/numeric/int128_benchmark.cc b/third_party/abseil/absl/numeric/int128_benchmark.cc
deleted file mode 100644
index eab1515..0000000
--- a/third_party/abseil/absl/numeric/int128_benchmark.cc
+++ /dev/null
@@ -1,282 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <algorithm>
-#include <cstdint>
-#include <limits>
-#include <random>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/config.h"
-#include "absl/numeric/int128.h"
-
-namespace {
-
-constexpr size_t kSampleSize = 1000000;
-
-std::mt19937 MakeRandomEngine() {
-  std::random_device r;
-  std::seed_seq seed({r(), r(), r(), r(), r(), r(), r(), r()});
-  return std::mt19937(seed);
-}
-
-template <typename T,
-          typename H = typename std::conditional<
-              std::numeric_limits<T>::is_signed, int64_t, uint64_t>::type>
-std::vector<std::pair<T, T>> GetRandomClass128SampleUniformDivisor() {
-  std::vector<std::pair<T, T>> values;
-  std::mt19937 random = MakeRandomEngine();
-  std::uniform_int_distribution<H> uniform_h;
-  values.reserve(kSampleSize);
-  for (size_t i = 0; i < kSampleSize; ++i) {
-    T a{absl::MakeUint128(uniform_h(random), uniform_h(random))};
-    T b{absl::MakeUint128(uniform_h(random), uniform_h(random))};
-    values.emplace_back(std::max(a, b), std::max(T(2), std::min(a, b)));
-  }
-  return values;
-}
-
-template <typename T>
-void BM_DivideClass128UniformDivisor(benchmark::State& state) {
-  auto values = GetRandomClass128SampleUniformDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first / pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_DivideClass128UniformDivisor, absl::uint128);
-BENCHMARK_TEMPLATE(BM_DivideClass128UniformDivisor, absl::int128);
-
-template <typename T>
-void BM_RemainderClass128UniformDivisor(benchmark::State& state) {
-  auto values = GetRandomClass128SampleUniformDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first % pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_RemainderClass128UniformDivisor, absl::uint128);
-BENCHMARK_TEMPLATE(BM_RemainderClass128UniformDivisor, absl::int128);
-
-template <typename T,
-          typename H = typename std::conditional<
-              std::numeric_limits<T>::is_signed, int64_t, uint64_t>::type>
-std::vector<std::pair<T, H>> GetRandomClass128SampleSmallDivisor() {
-  std::vector<std::pair<T, H>> values;
-  std::mt19937 random = MakeRandomEngine();
-  std::uniform_int_distribution<H> uniform_h;
-  values.reserve(kSampleSize);
-  for (size_t i = 0; i < kSampleSize; ++i) {
-    T a{absl::MakeUint128(uniform_h(random), uniform_h(random))};
-    H b{std::max(H{2}, uniform_h(random))};
-    values.emplace_back(std::max(a, T(b)), b);
-  }
-  return values;
-}
-
-template <typename T>
-void BM_DivideClass128SmallDivisor(benchmark::State& state) {
-  auto values = GetRandomClass128SampleSmallDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first / pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_DivideClass128SmallDivisor, absl::uint128);
-BENCHMARK_TEMPLATE(BM_DivideClass128SmallDivisor, absl::int128);
-
-template <typename T>
-void BM_RemainderClass128SmallDivisor(benchmark::State& state) {
-  auto values = GetRandomClass128SampleSmallDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first % pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_RemainderClass128SmallDivisor, absl::uint128);
-BENCHMARK_TEMPLATE(BM_RemainderClass128SmallDivisor, absl::int128);
-
-std::vector<std::pair<absl::uint128, absl::uint128>> GetRandomClass128Sample() {
-  std::vector<std::pair<absl::uint128, absl::uint128>> values;
-  std::mt19937 random = MakeRandomEngine();
-  std::uniform_int_distribution<uint64_t> uniform_uint64;
-  values.reserve(kSampleSize);
-  for (size_t i = 0; i < kSampleSize; ++i) {
-    values.emplace_back(
-        absl::MakeUint128(uniform_uint64(random), uniform_uint64(random)),
-        absl::MakeUint128(uniform_uint64(random), uniform_uint64(random)));
-  }
-  return values;
-}
-
-void BM_MultiplyClass128(benchmark::State& state) {
-  auto values = GetRandomClass128Sample();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first * pair.second);
-    }
-  }
-}
-BENCHMARK(BM_MultiplyClass128);
-
-void BM_AddClass128(benchmark::State& state) {
-  auto values = GetRandomClass128Sample();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first + pair.second);
-    }
-  }
-}
-BENCHMARK(BM_AddClass128);
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-
-// Some implementations of <random> do not support __int128 when it is
-// available, so we make our own uniform_int_distribution-like type.
-template <typename T,
-          typename H = typename std::conditional<
-              std::is_same<T, __int128>::value, int64_t, uint64_t>::type>
-class UniformIntDistribution128 {
- public:
-  // NOLINTNEXTLINE: mimicking std::uniform_int_distribution API
-  T operator()(std::mt19937& generator) {
-    return (static_cast<T>(dist64_(generator)) << 64) | dist64_(generator);
-  }
-
- private:
-  std::uniform_int_distribution<H> dist64_;
-};
-
-template <typename T,
-          typename H = typename std::conditional<
-              std::is_same<T, __int128>::value, int64_t, uint64_t>::type>
-std::vector<std::pair<T, T>> GetRandomIntrinsic128SampleUniformDivisor() {
-  std::vector<std::pair<T, T>> values;
-  std::mt19937 random = MakeRandomEngine();
-  UniformIntDistribution128<T> uniform_128;
-  values.reserve(kSampleSize);
-  for (size_t i = 0; i < kSampleSize; ++i) {
-    T a = uniform_128(random);
-    T b = uniform_128(random);
-    values.emplace_back(std::max(a, b),
-                        std::max(static_cast<T>(2), std::min(a, b)));
-  }
-  return values;
-}
-
-template <typename T>
-void BM_DivideIntrinsic128UniformDivisor(benchmark::State& state) {
-  auto values = GetRandomIntrinsic128SampleUniformDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first / pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_DivideIntrinsic128UniformDivisor, unsigned __int128);
-BENCHMARK_TEMPLATE(BM_DivideIntrinsic128UniformDivisor, __int128);
-
-template <typename T>
-void BM_RemainderIntrinsic128UniformDivisor(benchmark::State& state) {
-  auto values = GetRandomIntrinsic128SampleUniformDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first % pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_RemainderIntrinsic128UniformDivisor, unsigned __int128);
-BENCHMARK_TEMPLATE(BM_RemainderIntrinsic128UniformDivisor, __int128);
-
-template <typename T,
-          typename H = typename std::conditional<
-              std::is_same<T, __int128>::value, int64_t, uint64_t>::type>
-std::vector<std::pair<T, H>> GetRandomIntrinsic128SampleSmallDivisor() {
-  std::vector<std::pair<T, H>> values;
-  std::mt19937 random = MakeRandomEngine();
-  UniformIntDistribution128<T> uniform_int128;
-  std::uniform_int_distribution<H> uniform_int64;
-  values.reserve(kSampleSize);
-  for (size_t i = 0; i < kSampleSize; ++i) {
-    T a = uniform_int128(random);
-    H b = std::max(H{2}, uniform_int64(random));
-    values.emplace_back(std::max(a, static_cast<T>(b)), b);
-  }
-  return values;
-}
-
-template <typename T>
-void BM_DivideIntrinsic128SmallDivisor(benchmark::State& state) {
-  auto values = GetRandomIntrinsic128SampleSmallDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first / pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_DivideIntrinsic128SmallDivisor, unsigned __int128);
-BENCHMARK_TEMPLATE(BM_DivideIntrinsic128SmallDivisor, __int128);
-
-template <typename T>
-void BM_RemainderIntrinsic128SmallDivisor(benchmark::State& state) {
-  auto values = GetRandomIntrinsic128SampleSmallDivisor<T>();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first % pair.second);
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_RemainderIntrinsic128SmallDivisor, unsigned __int128);
-BENCHMARK_TEMPLATE(BM_RemainderIntrinsic128SmallDivisor, __int128);
-
-std::vector<std::pair<unsigned __int128, unsigned __int128>>
-      GetRandomIntrinsic128Sample() {
-  std::vector<std::pair<unsigned __int128, unsigned __int128>> values;
-  std::mt19937 random = MakeRandomEngine();
-  UniformIntDistribution128<unsigned __int128> uniform_uint128;
-  values.reserve(kSampleSize);
-  for (size_t i = 0; i < kSampleSize; ++i) {
-    values.emplace_back(uniform_uint128(random), uniform_uint128(random));
-  }
-  return values;
-}
-
-void BM_MultiplyIntrinsic128(benchmark::State& state) {
-  auto values = GetRandomIntrinsic128Sample();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first * pair.second);
-    }
-  }
-}
-BENCHMARK(BM_MultiplyIntrinsic128);
-
-void BM_AddIntrinsic128(benchmark::State& state) {
-  auto values = GetRandomIntrinsic128Sample();
-  while (state.KeepRunningBatch(values.size())) {
-    for (const auto& pair : values) {
-      benchmark::DoNotOptimize(pair.first + pair.second);
-    }
-  }
-}
-BENCHMARK(BM_AddIntrinsic128);
-
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-}  // namespace
diff --git a/third_party/abseil/absl/numeric/int128_have_intrinsic.inc b/third_party/abseil/absl/numeric/int128_have_intrinsic.inc
deleted file mode 100644
index d6c76dd..0000000
--- a/third_party/abseil/absl/numeric/int128_have_intrinsic.inc
+++ /dev/null
@@ -1,302 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file contains :int128 implementation details that depend on internal
-// representation when ABSL_HAVE_INTRINSIC_INT128 is defined. This file is
-// included by int128.h and relies on ABSL_INTERNAL_WCHAR_T being defined.
-
-namespace int128_internal {
-
-// Casts from unsigned to signed while preserving the underlying binary
-// representation.
-constexpr __int128 BitCastToSigned(unsigned __int128 v) {
-  // Casting an unsigned integer to a signed integer of the same
-  // width is implementation defined behavior if the source value would not fit
-  // in the destination type. We step around it with a roundtrip bitwise not
-  // operation to make sure this function remains constexpr. Clang and GCC
-  // optimize this to a no-op on x86-64.
-  return v & (static_cast<unsigned __int128>(1) << 127)
-             ? ~static_cast<__int128>(~v)
-             : static_cast<__int128>(v);
-}
-
-}  // namespace int128_internal
-
-inline int128& int128::operator=(__int128 v) {
-  v_ = v;
-  return *this;
-}
-
-constexpr uint64_t Int128Low64(int128 v) {
-  return static_cast<uint64_t>(v.v_ & ~uint64_t{0});
-}
-
-constexpr int64_t Int128High64(int128 v) {
-  // Initially cast to unsigned to prevent a right shift on a negative value.
-  return int128_internal::BitCastToSigned(
-      static_cast<uint64_t>(static_cast<unsigned __int128>(v.v_) >> 64));
-}
-
-constexpr int128::int128(int64_t high, uint64_t low)
-    // Initially cast to unsigned to prevent a left shift that overflows.
-    : v_(int128_internal::BitCastToSigned(static_cast<unsigned __int128>(high)
-                                           << 64) |
-         low) {}
-
-
-constexpr int128::int128(int v) : v_{v} {}
-
-constexpr int128::int128(long v) : v_{v} {}       // NOLINT(runtime/int)
-
-constexpr int128::int128(long long v) : v_{v} {}  // NOLINT(runtime/int)
-
-constexpr int128::int128(__int128 v) : v_{v} {}
-
-constexpr int128::int128(unsigned int v) : v_{v} {}
-
-constexpr int128::int128(unsigned long v) : v_{v} {}  // NOLINT(runtime/int)
-
-// NOLINTNEXTLINE(runtime/int)
-constexpr int128::int128(unsigned long long v) : v_{v} {}
-
-constexpr int128::int128(unsigned __int128 v) : v_{static_cast<__int128>(v)} {}
-
-inline int128::int128(float v) {
-  v_ = static_cast<__int128>(v);
-}
-
-inline int128::int128(double v) {
-  v_ = static_cast<__int128>(v);
-}
-
-inline int128::int128(long double v) {
-  v_ = static_cast<__int128>(v);
-}
-
-constexpr int128::int128(uint128 v) : v_{static_cast<__int128>(v)} {}
-
-constexpr int128::operator bool() const { return static_cast<bool>(v_); }
-
-constexpr int128::operator char() const { return static_cast<char>(v_); }
-
-constexpr int128::operator signed char() const {
-  return static_cast<signed char>(v_);
-}
-
-constexpr int128::operator unsigned char() const {
-  return static_cast<unsigned char>(v_);
-}
-
-constexpr int128::operator char16_t() const {
-  return static_cast<char16_t>(v_);
-}
-
-constexpr int128::operator char32_t() const {
-  return static_cast<char32_t>(v_);
-}
-
-constexpr int128::operator ABSL_INTERNAL_WCHAR_T() const {
-  return static_cast<ABSL_INTERNAL_WCHAR_T>(v_);
-}
-
-constexpr int128::operator short() const {  // NOLINT(runtime/int)
-  return static_cast<short>(v_);            // NOLINT(runtime/int)
-}
-
-constexpr int128::operator unsigned short() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned short>(v_);            // NOLINT(runtime/int)
-}
-
-constexpr int128::operator int() const {
-  return static_cast<int>(v_);
-}
-
-constexpr int128::operator unsigned int() const {
-  return static_cast<unsigned int>(v_);
-}
-
-constexpr int128::operator long() const {  // NOLINT(runtime/int)
-  return static_cast<long>(v_);            // NOLINT(runtime/int)
-}
-
-constexpr int128::operator unsigned long() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned long>(v_);            // NOLINT(runtime/int)
-}
-
-constexpr int128::operator long long() const {  // NOLINT(runtime/int)
-  return static_cast<long long>(v_);            // NOLINT(runtime/int)
-}
-
-constexpr int128::operator unsigned long long() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned long long>(v_);            // NOLINT(runtime/int)
-}
-
-constexpr int128::operator __int128() const { return v_; }
-
-constexpr int128::operator unsigned __int128() const {
-  return static_cast<unsigned __int128>(v_);
-}
-
-// Clang on PowerPC sometimes produces incorrect __int128 to floating point
-// conversions. In that case, we do the conversion with a similar implementation
-// to the conversion operators in int128_no_intrinsic.inc.
-#if defined(__clang__) && !defined(__ppc64__)
-inline int128::operator float() const { return static_cast<float>(v_); }
-
-inline int128::operator double () const { return static_cast<double>(v_); }
-
-inline int128::operator long double() const {
-  return static_cast<long double>(v_);
-}
-
-#else  // Clang on PowerPC
-// Forward declaration for conversion operators to floating point types.
-int128 operator-(int128 v);
-bool operator!=(int128 lhs, int128 rhs);
-
-inline int128::operator float() const {
-  // We must convert the absolute value and then negate as needed, because
-  // floating point types are typically sign-magnitude. Otherwise, the
-  // difference between the high and low 64 bits when interpreted as two's
-  // complement overwhelms the precision of the mantissa.
-  //
-  // Also check to make sure we don't negate Int128Min()
-  return v_ < 0 && *this != Int128Min()
-             ? -static_cast<float>(-*this)
-             : static_cast<float>(Int128Low64(*this)) +
-                   std::ldexp(static_cast<float>(Int128High64(*this)), 64);
-}
-
-inline int128::operator double() const {
-  // See comment in int128::operator float() above.
-  return v_ < 0 && *this != Int128Min()
-             ? -static_cast<double>(-*this)
-             : static_cast<double>(Int128Low64(*this)) +
-                   std::ldexp(static_cast<double>(Int128High64(*this)), 64);
-}
-
-inline int128::operator long double() const {
-  // See comment in int128::operator float() above.
-  return v_ < 0 && *this != Int128Min()
-             ? -static_cast<long double>(-*this)
-             : static_cast<long double>(Int128Low64(*this)) +
-                   std::ldexp(static_cast<long double>(Int128High64(*this)),
-                              64);
-}
-#endif  // Clang on PowerPC
-
-// Comparison operators.
-
-inline bool operator==(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) == static_cast<__int128>(rhs);
-}
-
-inline bool operator!=(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) != static_cast<__int128>(rhs);
-}
-
-inline bool operator<(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) < static_cast<__int128>(rhs);
-}
-
-inline bool operator>(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) > static_cast<__int128>(rhs);
-}
-
-inline bool operator<=(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) <= static_cast<__int128>(rhs);
-}
-
-inline bool operator>=(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) >= static_cast<__int128>(rhs);
-}
-
-// Unary operators.
-
-inline int128 operator-(int128 v) {
-  return -static_cast<__int128>(v);
-}
-
-inline bool operator!(int128 v) {
-  return !static_cast<__int128>(v);
-}
-
-inline int128 operator~(int128 val) {
-  return ~static_cast<__int128>(val);
-}
-
-// Arithmetic operators.
-
-inline int128 operator+(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) + static_cast<__int128>(rhs);
-}
-
-inline int128 operator-(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) - static_cast<__int128>(rhs);
-}
-
-inline int128 operator*(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) * static_cast<__int128>(rhs);
-}
-
-inline int128 operator/(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) / static_cast<__int128>(rhs);
-}
-
-inline int128 operator%(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) % static_cast<__int128>(rhs);
-}
-
-inline int128 int128::operator++(int) {
-  int128 tmp(*this);
-  ++v_;
-  return tmp;
-}
-
-inline int128 int128::operator--(int) {
-  int128 tmp(*this);
-  --v_;
-  return tmp;
-}
-
-inline int128& int128::operator++() {
-  ++v_;
-  return *this;
-}
-
-inline int128& int128::operator--() {
-  --v_;
-  return *this;
-}
-
-inline int128 operator|(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) | static_cast<__int128>(rhs);
-}
-
-inline int128 operator&(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) & static_cast<__int128>(rhs);
-}
-
-inline int128 operator^(int128 lhs, int128 rhs) {
-  return static_cast<__int128>(lhs) ^ static_cast<__int128>(rhs);
-}
-
-inline int128 operator<<(int128 lhs, int amount) {
-  return static_cast<__int128>(lhs) << amount;
-}
-
-inline int128 operator>>(int128 lhs, int amount) {
-  return static_cast<__int128>(lhs) >> amount;
-}
diff --git a/third_party/abseil/absl/numeric/int128_no_intrinsic.inc b/third_party/abseil/absl/numeric/int128_no_intrinsic.inc
deleted file mode 100644
index c753771..0000000
--- a/third_party/abseil/absl/numeric/int128_no_intrinsic.inc
+++ /dev/null
@@ -1,308 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file contains :int128 implementation details that depend on internal
-// representation when ABSL_HAVE_INTRINSIC_INT128 is *not* defined. This file
-// is included by int128.h and relies on ABSL_INTERNAL_WCHAR_T being defined.
-
-constexpr uint64_t Int128Low64(int128 v) { return v.lo_; }
-
-constexpr int64_t Int128High64(int128 v) { return v.hi_; }
-
-#if defined(ABSL_IS_LITTLE_ENDIAN)
-
-constexpr int128::int128(int64_t high, uint64_t low) :
-    lo_(low), hi_(high) {}
-
-constexpr int128::int128(int v)
-    : lo_{static_cast<uint64_t>(v)}, hi_{v < 0 ? ~int64_t{0} : 0} {}
-constexpr int128::int128(long v)  // NOLINT(runtime/int)
-    : lo_{static_cast<uint64_t>(v)}, hi_{v < 0 ? ~int64_t{0} : 0} {}
-constexpr int128::int128(long long v)  // NOLINT(runtime/int)
-    : lo_{static_cast<uint64_t>(v)}, hi_{v < 0 ? ~int64_t{0} : 0} {}
-
-constexpr int128::int128(unsigned int v) : lo_{v}, hi_{0} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr int128::int128(unsigned long v) : lo_{v}, hi_{0} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr int128::int128(unsigned long long v) : lo_{v}, hi_{0} {}
-
-constexpr int128::int128(uint128 v)
-    : lo_{Uint128Low64(v)}, hi_{static_cast<int64_t>(Uint128High64(v))} {}
-
-#elif defined(ABSL_IS_BIG_ENDIAN)
-
-constexpr int128::int128(int64_t high, uint64_t low) :
-    hi_{high}, lo_{low} {}
-
-constexpr int128::int128(int v)
-    : hi_{v < 0 ? ~int64_t{0} : 0}, lo_{static_cast<uint64_t>(v)} {}
-constexpr int128::int128(long v)  // NOLINT(runtime/int)
-    : hi_{v < 0 ? ~int64_t{0} : 0}, lo_{static_cast<uint64_t>(v)} {}
-constexpr int128::int128(long long v)  // NOLINT(runtime/int)
-    : hi_{v < 0 ? ~int64_t{0} : 0}, lo_{static_cast<uint64_t>(v)} {}
-
-constexpr int128::int128(unsigned int v) : hi_{0}, lo_{v} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr int128::int128(unsigned long v) : hi_{0}, lo_{v} {}
-// NOLINTNEXTLINE(runtime/int)
-constexpr int128::int128(unsigned long long v) : hi_{0}, lo_{v} {}
-
-constexpr int128::int128(uint128 v)
-    : hi_{static_cast<int64_t>(Uint128High64(v))}, lo_{Uint128Low64(v)} {}
-
-#else  // byte order
-#error "Unsupported byte order: must be little-endian or big-endian."
-#endif  // byte order
-
-constexpr int128::operator bool() const { return lo_ || hi_; }
-
-constexpr int128::operator char() const {
-  // NOLINTNEXTLINE(runtime/int)
-  return static_cast<char>(static_cast<long long>(*this));
-}
-
-constexpr int128::operator signed char() const {
-  // NOLINTNEXTLINE(runtime/int)
-  return static_cast<signed char>(static_cast<long long>(*this));
-}
-
-constexpr int128::operator unsigned char() const {
-  return static_cast<unsigned char>(lo_);
-}
-
-constexpr int128::operator char16_t() const {
-  return static_cast<char16_t>(lo_);
-}
-
-constexpr int128::operator char32_t() const {
-  return static_cast<char32_t>(lo_);
-}
-
-constexpr int128::operator ABSL_INTERNAL_WCHAR_T() const {
-  // NOLINTNEXTLINE(runtime/int)
-  return static_cast<ABSL_INTERNAL_WCHAR_T>(static_cast<long long>(*this));
-}
-
-constexpr int128::operator short() const {  // NOLINT(runtime/int)
-  // NOLINTNEXTLINE(runtime/int)
-  return static_cast<short>(static_cast<long long>(*this));
-}
-
-constexpr int128::operator unsigned short() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned short>(lo_);           // NOLINT(runtime/int)
-}
-
-constexpr int128::operator int() const {
-  // NOLINTNEXTLINE(runtime/int)
-  return static_cast<int>(static_cast<long long>(*this));
-}
-
-constexpr int128::operator unsigned int() const {
-  return static_cast<unsigned int>(lo_);
-}
-
-constexpr int128::operator long() const {  // NOLINT(runtime/int)
-  // NOLINTNEXTLINE(runtime/int)
-  return static_cast<long>(static_cast<long long>(*this));
-}
-
-constexpr int128::operator unsigned long() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned long>(lo_);           // NOLINT(runtime/int)
-}
-
-constexpr int128::operator long long() const {  // NOLINT(runtime/int)
-  // We don't bother checking the value of hi_. If *this < 0, lo_'s high bit
-  // must be set in order for the value to fit into a long long. Conversely, if
-  // lo_'s high bit is set, *this must be < 0 for the value to fit.
-  return int128_internal::BitCastToSigned(lo_);
-}
-
-constexpr int128::operator unsigned long long() const {  // NOLINT(runtime/int)
-  return static_cast<unsigned long long>(lo_);           // NOLINT(runtime/int)
-}
-
-// Forward declaration for conversion operators to floating point types.
-int128 operator-(int128 v);
-bool operator!=(int128 lhs, int128 rhs);
-
-inline int128::operator float() const {
-  // We must convert the absolute value and then negate as needed, because
-  // floating point types are typically sign-magnitude. Otherwise, the
-  // difference between the high and low 64 bits when interpreted as two's
-  // complement overwhelms the precision of the mantissa.
-  //
-  // Also check to make sure we don't negate Int128Min()
-  return hi_ < 0 && *this != Int128Min()
-             ? -static_cast<float>(-*this)
-             : static_cast<float>(lo_) +
-                   std::ldexp(static_cast<float>(hi_), 64);
-}
-
-inline int128::operator double() const {
-  // See comment in int128::operator float() above.
-  return hi_ < 0 && *this != Int128Min()
-             ? -static_cast<double>(-*this)
-             : static_cast<double>(lo_) +
-                   std::ldexp(static_cast<double>(hi_), 64);
-}
-
-inline int128::operator long double() const {
-  // See comment in int128::operator float() above.
-  return hi_ < 0 && *this != Int128Min()
-             ? -static_cast<long double>(-*this)
-             : static_cast<long double>(lo_) +
-                   std::ldexp(static_cast<long double>(hi_), 64);
-}
-
-// Comparison operators.
-
-inline bool operator==(int128 lhs, int128 rhs) {
-  return (Int128Low64(lhs) == Int128Low64(rhs) &&
-          Int128High64(lhs) == Int128High64(rhs));
-}
-
-inline bool operator!=(int128 lhs, int128 rhs) {
-  return !(lhs == rhs);
-}
-
-inline bool operator<(int128 lhs, int128 rhs) {
-  return (Int128High64(lhs) == Int128High64(rhs))
-             ? (Int128Low64(lhs) < Int128Low64(rhs))
-             : (Int128High64(lhs) < Int128High64(rhs));
-}
-
-inline bool operator>(int128 lhs, int128 rhs) {
-  return (Int128High64(lhs) == Int128High64(rhs))
-             ? (Int128Low64(lhs) > Int128Low64(rhs))
-             : (Int128High64(lhs) > Int128High64(rhs));
-}
-
-inline bool operator<=(int128 lhs, int128 rhs) {
-  return !(lhs > rhs);
-}
-
-inline bool operator>=(int128 lhs, int128 rhs) {
-  return !(lhs < rhs);
-}
-
-// Unary operators.
-
-inline int128 operator-(int128 v) {
-  int64_t hi = ~Int128High64(v);
-  uint64_t lo = ~Int128Low64(v) + 1;
-  if (lo == 0) ++hi;  // carry
-  return MakeInt128(hi, lo);
-}
-
-inline bool operator!(int128 v) {
-  return !Int128Low64(v) && !Int128High64(v);
-}
-
-inline int128 operator~(int128 val) {
-  return MakeInt128(~Int128High64(val), ~Int128Low64(val));
-}
-
-// Arithmetic operators.
-
-inline int128 operator+(int128 lhs, int128 rhs) {
-  int128 result = MakeInt128(Int128High64(lhs) + Int128High64(rhs),
-                             Int128Low64(lhs) + Int128Low64(rhs));
-  if (Int128Low64(result) < Int128Low64(lhs)) {  // check for carry
-    return MakeInt128(Int128High64(result) + 1, Int128Low64(result));
-  }
-  return result;
-}
-
-inline int128 operator-(int128 lhs, int128 rhs) {
-  int128 result = MakeInt128(Int128High64(lhs) - Int128High64(rhs),
-                             Int128Low64(lhs) - Int128Low64(rhs));
-  if (Int128Low64(lhs) < Int128Low64(rhs)) {  // check for carry
-    return MakeInt128(Int128High64(result) - 1, Int128Low64(result));
-  }
-  return result;
-}
-
-inline int128 operator*(int128 lhs, int128 rhs) {
-  uint128 result = uint128(lhs) * rhs;
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(result)),
-                    Uint128Low64(result));
-}
-
-inline int128 int128::operator++(int) {
-  int128 tmp(*this);
-  *this += 1;
-  return tmp;
-}
-
-inline int128 int128::operator--(int) {
-  int128 tmp(*this);
-  *this -= 1;
-  return tmp;
-}
-
-inline int128& int128::operator++() {
-  *this += 1;
-  return *this;
-}
-
-inline int128& int128::operator--() {
-  *this -= 1;
-  return *this;
-}
-
-inline int128 operator|(int128 lhs, int128 rhs) {
-  return MakeInt128(Int128High64(lhs) | Int128High64(rhs),
-                    Int128Low64(lhs) | Int128Low64(rhs));
-}
-
-inline int128 operator&(int128 lhs, int128 rhs) {
-  return MakeInt128(Int128High64(lhs) & Int128High64(rhs),
-                    Int128Low64(lhs) & Int128Low64(rhs));
-}
-
-inline int128 operator^(int128 lhs, int128 rhs) {
-  return MakeInt128(Int128High64(lhs) ^ Int128High64(rhs),
-                    Int128Low64(lhs) ^ Int128Low64(rhs));
-}
-
-inline int128 operator<<(int128 lhs, int amount) {
-  // uint64_t shifts of >= 64 are undefined, so we need some special-casing.
-  if (amount < 64) {
-    if (amount != 0) {
-      return MakeInt128(
-          (Int128High64(lhs) << amount) |
-              static_cast<int64_t>(Int128Low64(lhs) >> (64 - amount)),
-          Int128Low64(lhs) << amount);
-    }
-    return lhs;
-  }
-  return MakeInt128(static_cast<int64_t>(Int128Low64(lhs) << (amount - 64)), 0);
-}
-
-inline int128 operator>>(int128 lhs, int amount) {
-  // uint64_t shifts of >= 64 are undefined, so we need some special-casing.
-  if (amount < 64) {
-    if (amount != 0) {
-      return MakeInt128(
-          Int128High64(lhs) >> amount,
-          (Int128Low64(lhs) >> amount) |
-              (static_cast<uint64_t>(Int128High64(lhs)) << (64 - amount)));
-    }
-    return lhs;
-  }
-  return MakeInt128(0,
-                    static_cast<uint64_t>(Int128High64(lhs) >> (amount - 64)));
-}
diff --git a/third_party/abseil/absl/numeric/int128_stream_test.cc b/third_party/abseil/absl/numeric/int128_stream_test.cc
deleted file mode 100644
index 479ad66..0000000
--- a/third_party/abseil/absl/numeric/int128_stream_test.cc
+++ /dev/null
@@ -1,1395 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/numeric/int128.h"
-
-#include <sstream>
-#include <string>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-struct Uint128TestCase {
-  absl::uint128 value;
-  std::ios_base::fmtflags flags;
-  std::streamsize width;
-  const char* expected;
-};
-
-constexpr char kFill = '_';
-
-std::string StreamFormatToString(std::ios_base::fmtflags flags,
-                                 std::streamsize width) {
-  std::vector<const char*> flagstr;
-  switch (flags & std::ios::basefield) {
-    case std::ios::dec:
-      flagstr.push_back("std::ios::dec");
-      break;
-    case std::ios::oct:
-      flagstr.push_back("std::ios::oct");
-      break;
-    case std::ios::hex:
-      flagstr.push_back("std::ios::hex");
-      break;
-    default:  // basefield not specified
-      break;
-  }
-  switch (flags & std::ios::adjustfield) {
-    case std::ios::left:
-      flagstr.push_back("std::ios::left");
-      break;
-    case std::ios::internal:
-      flagstr.push_back("std::ios::internal");
-      break;
-    case std::ios::right:
-      flagstr.push_back("std::ios::right");
-      break;
-    default:  // adjustfield not specified
-      break;
-  }
-  if (flags & std::ios::uppercase) flagstr.push_back("std::ios::uppercase");
-  if (flags & std::ios::showbase) flagstr.push_back("std::ios::showbase");
-  if (flags & std::ios::showpos) flagstr.push_back("std::ios::showpos");
-
-  std::ostringstream msg;
-  msg << "\n  StreamFormatToString(test_case.flags, test_case.width)\n    "
-         "flags: ";
-  if (!flagstr.empty()) {
-    for (size_t i = 0; i < flagstr.size() - 1; ++i) msg << flagstr[i] << " | ";
-    msg << flagstr.back();
-  } else {
-    msg << "(default)";
-  }
-  msg << "\n    width: " << width << "\n    fill: '" << kFill << "'";
-  return msg.str();
-}
-
-void CheckUint128Case(const Uint128TestCase& test_case) {
-  std::ostringstream os;
-  os.flags(test_case.flags);
-  os.width(test_case.width);
-  os.fill(kFill);
-  os << test_case.value;
-  SCOPED_TRACE(StreamFormatToString(test_case.flags, test_case.width));
-  EXPECT_EQ(test_case.expected, os.str());
-}
-
-constexpr std::ios::fmtflags kDec = std::ios::dec;
-constexpr std::ios::fmtflags kOct = std::ios::oct;
-constexpr std::ios::fmtflags kHex = std::ios::hex;
-constexpr std::ios::fmtflags kLeft = std::ios::left;
-constexpr std::ios::fmtflags kInt = std::ios::internal;
-constexpr std::ios::fmtflags kRight = std::ios::right;
-constexpr std::ios::fmtflags kUpper = std::ios::uppercase;
-constexpr std::ios::fmtflags kBase = std::ios::showbase;
-constexpr std::ios::fmtflags kPos = std::ios::showpos;
-
-TEST(Uint128, OStreamValueTest) {
-  CheckUint128Case({1, kDec, /*width = */ 0, "1"});
-  CheckUint128Case({1, kOct, /*width = */ 0, "1"});
-  CheckUint128Case({1, kHex, /*width = */ 0, "1"});
-  CheckUint128Case({9, kDec, /*width = */ 0, "9"});
-  CheckUint128Case({9, kOct, /*width = */ 0, "11"});
-  CheckUint128Case({9, kHex, /*width = */ 0, "9"});
-  CheckUint128Case({12345, kDec, /*width = */ 0, "12345"});
-  CheckUint128Case({12345, kOct, /*width = */ 0, "30071"});
-  CheckUint128Case({12345, kHex, /*width = */ 0, "3039"});
-  CheckUint128Case(
-      {0x8000000000000000, kDec, /*width = */ 0, "9223372036854775808"});
-  CheckUint128Case(
-      {0x8000000000000000, kOct, /*width = */ 0, "1000000000000000000000"});
-  CheckUint128Case(
-      {0x8000000000000000, kHex, /*width = */ 0, "8000000000000000"});
-  CheckUint128Case({std::numeric_limits<uint64_t>::max(), kDec,
-                    /*width = */ 0, "18446744073709551615"});
-  CheckUint128Case({std::numeric_limits<uint64_t>::max(), kOct,
-                    /*width = */ 0, "1777777777777777777777"});
-  CheckUint128Case({std::numeric_limits<uint64_t>::max(), kHex,
-                    /*width = */ 0, "ffffffffffffffff"});
-  CheckUint128Case(
-      {absl::MakeUint128(1, 0), kDec, /*width = */ 0, "18446744073709551616"});
-  CheckUint128Case({absl::MakeUint128(1, 0), kOct, /*width = */ 0,
-                    "2000000000000000000000"});
-  CheckUint128Case(
-      {absl::MakeUint128(1, 0), kHex, /*width = */ 0, "10000000000000000"});
-  CheckUint128Case({absl::MakeUint128(0x8000000000000000, 0), kDec,
-                    /*width = */ 0, "170141183460469231731687303715884105728"});
-  CheckUint128Case({absl::MakeUint128(0x8000000000000000, 0), kOct,
-                    /*width = */ 0,
-                    "2000000000000000000000000000000000000000000"});
-  CheckUint128Case({absl::MakeUint128(0x8000000000000000, 0), kHex,
-                    /*width = */ 0, "80000000000000000000000000000000"});
-  CheckUint128Case({absl::kuint128max, kDec, /*width = */ 0,
-                    "340282366920938463463374607431768211455"});
-  CheckUint128Case({absl::kuint128max, kOct, /*width = */ 0,
-                    "3777777777777777777777777777777777777777777"});
-  CheckUint128Case({absl::kuint128max, kHex, /*width = */ 0,
-                    "ffffffffffffffffffffffffffffffff"});
-}
-
-std::vector<Uint128TestCase> GetUint128FormatCases();
-
-TEST(Uint128, OStreamFormatTest) {
-  for (const Uint128TestCase& test_case : GetUint128FormatCases()) {
-    CheckUint128Case(test_case);
-  }
-}
-
-struct Int128TestCase {
-  absl::int128 value;
-  std::ios_base::fmtflags flags;
-  std::streamsize width;
-  const char* expected;
-};
-
-void CheckInt128Case(const Int128TestCase& test_case) {
-  std::ostringstream os;
-  os.flags(test_case.flags);
-  os.width(test_case.width);
-  os.fill(kFill);
-  os << test_case.value;
-  SCOPED_TRACE(StreamFormatToString(test_case.flags, test_case.width));
-  EXPECT_EQ(test_case.expected, os.str());
-}
-
-TEST(Int128, OStreamValueTest) {
-  CheckInt128Case({1, kDec, /*width = */ 0, "1"});
-  CheckInt128Case({1, kOct, /*width = */ 0, "1"});
-  CheckInt128Case({1, kHex, /*width = */ 0, "1"});
-  CheckInt128Case({9, kDec, /*width = */ 0, "9"});
-  CheckInt128Case({9, kOct, /*width = */ 0, "11"});
-  CheckInt128Case({9, kHex, /*width = */ 0, "9"});
-  CheckInt128Case({12345, kDec, /*width = */ 0, "12345"});
-  CheckInt128Case({12345, kOct, /*width = */ 0, "30071"});
-  CheckInt128Case({12345, kHex, /*width = */ 0, "3039"});
-  CheckInt128Case(
-      {0x8000000000000000, kDec, /*width = */ 0, "9223372036854775808"});
-  CheckInt128Case(
-      {0x8000000000000000, kOct, /*width = */ 0, "1000000000000000000000"});
-  CheckInt128Case(
-      {0x8000000000000000, kHex, /*width = */ 0, "8000000000000000"});
-  CheckInt128Case({std::numeric_limits<uint64_t>::max(), kDec,
-                   /*width = */ 0, "18446744073709551615"});
-  CheckInt128Case({std::numeric_limits<uint64_t>::max(), kOct,
-                   /*width = */ 0, "1777777777777777777777"});
-  CheckInt128Case({std::numeric_limits<uint64_t>::max(), kHex,
-                   /*width = */ 0, "ffffffffffffffff"});
-  CheckInt128Case(
-      {absl::MakeInt128(1, 0), kDec, /*width = */ 0, "18446744073709551616"});
-  CheckInt128Case(
-      {absl::MakeInt128(1, 0), kOct, /*width = */ 0, "2000000000000000000000"});
-  CheckInt128Case(
-      {absl::MakeInt128(1, 0), kHex, /*width = */ 0, "10000000000000000"});
-  CheckInt128Case({absl::MakeInt128(std::numeric_limits<int64_t>::max(),
-                                    std::numeric_limits<uint64_t>::max()),
-                   std::ios::dec, /*width = */ 0,
-                   "170141183460469231731687303715884105727"});
-  CheckInt128Case({absl::MakeInt128(std::numeric_limits<int64_t>::max(),
-                                    std::numeric_limits<uint64_t>::max()),
-                   std::ios::oct, /*width = */ 0,
-                   "1777777777777777777777777777777777777777777"});
-  CheckInt128Case({absl::MakeInt128(std::numeric_limits<int64_t>::max(),
-                                    std::numeric_limits<uint64_t>::max()),
-                   std::ios::hex, /*width = */ 0,
-                   "7fffffffffffffffffffffffffffffff"});
-  CheckInt128Case({absl::MakeInt128(std::numeric_limits<int64_t>::min(), 0),
-                   std::ios::dec, /*width = */ 0,
-                   "-170141183460469231731687303715884105728"});
-  CheckInt128Case({absl::MakeInt128(std::numeric_limits<int64_t>::min(), 0),
-                   std::ios::oct, /*width = */ 0,
-                   "2000000000000000000000000000000000000000000"});
-  CheckInt128Case({absl::MakeInt128(std::numeric_limits<int64_t>::min(), 0),
-                   std::ios::hex, /*width = */ 0,
-                   "80000000000000000000000000000000"});
-  CheckInt128Case({-1, std::ios::dec, /*width = */ 0, "-1"});
-  CheckInt128Case({-1, std::ios::oct, /*width = */ 0,
-                   "3777777777777777777777777777777777777777777"});
-  CheckInt128Case(
-      {-1, std::ios::hex, /*width = */ 0, "ffffffffffffffffffffffffffffffff"});
-  CheckInt128Case({-12345, std::ios::dec, /*width = */ 0, "-12345"});
-  CheckInt128Case({-12345, std::ios::oct, /*width = */ 0,
-                   "3777777777777777777777777777777777777747707"});
-  CheckInt128Case({-12345, std::ios::hex, /*width = */ 0,
-                   "ffffffffffffffffffffffffffffcfc7"});
-}
-
-std::vector<Int128TestCase> GetInt128FormatCases();
-TEST(Int128, OStreamFormatTest) {
-  for (const Int128TestCase& test_case : GetInt128FormatCases()) {
-    CheckInt128Case(test_case);
-  }
-}
-
-std::vector<Int128TestCase> GetInt128FormatCases() {
-  return {
-      {0, std::ios_base::fmtflags(), /*width = */ 0, "0"},
-      {0, std::ios_base::fmtflags(), /*width = */ 6, "_____0"},
-      {0, kPos, /*width = */ 0, "+0"},
-      {0, kPos, /*width = */ 6, "____+0"},
-      {0, kBase, /*width = */ 0, "0"},
-      {0, kBase, /*width = */ 6, "_____0"},
-      {0, kBase | kPos, /*width = */ 0, "+0"},
-      {0, kBase | kPos, /*width = */ 6, "____+0"},
-      {0, kUpper, /*width = */ 0, "0"},
-      {0, kUpper, /*width = */ 6, "_____0"},
-      {0, kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kUpper | kPos, /*width = */ 6, "____+0"},
-      {0, kUpper | kBase, /*width = */ 0, "0"},
-      {0, kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kUpper | kBase | kPos, /*width = */ 6, "____+0"},
-      {0, kLeft, /*width = */ 0, "0"},
-      {0, kLeft, /*width = */ 6, "0_____"},
-      {0, kLeft | kPos, /*width = */ 0, "+0"},
-      {0, kLeft | kPos, /*width = */ 6, "+0____"},
-      {0, kLeft | kBase, /*width = */ 0, "0"},
-      {0, kLeft | kBase, /*width = */ 6, "0_____"},
-      {0, kLeft | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kLeft | kBase | kPos, /*width = */ 6, "+0____"},
-      {0, kLeft | kUpper, /*width = */ 0, "0"},
-      {0, kLeft | kUpper, /*width = */ 6, "0_____"},
-      {0, kLeft | kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kLeft | kUpper | kPos, /*width = */ 6, "+0____"},
-      {0, kLeft | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kLeft | kUpper | kBase, /*width = */ 6, "0_____"},
-      {0, kLeft | kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kLeft | kUpper | kBase | kPos, /*width = */ 6, "+0____"},
-      {0, kInt, /*width = */ 0, "0"},
-      {0, kInt, /*width = */ 6, "_____0"},
-      {0, kInt | kPos, /*width = */ 0, "+0"},
-      {0, kInt | kPos, /*width = */ 6, "+____0"},
-      {0, kInt | kBase, /*width = */ 0, "0"},
-      {0, kInt | kBase, /*width = */ 6, "_____0"},
-      {0, kInt | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kInt | kBase | kPos, /*width = */ 6, "+____0"},
-      {0, kInt | kUpper, /*width = */ 0, "0"},
-      {0, kInt | kUpper, /*width = */ 6, "_____0"},
-      {0, kInt | kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kInt | kUpper | kPos, /*width = */ 6, "+____0"},
-      {0, kInt | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kInt | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kInt | kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kInt | kUpper | kBase | kPos, /*width = */ 6, "+____0"},
-      {0, kRight, /*width = */ 0, "0"},
-      {0, kRight, /*width = */ 6, "_____0"},
-      {0, kRight | kPos, /*width = */ 0, "+0"},
-      {0, kRight | kPos, /*width = */ 6, "____+0"},
-      {0, kRight | kBase, /*width = */ 0, "0"},
-      {0, kRight | kBase, /*width = */ 6, "_____0"},
-      {0, kRight | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kRight | kBase | kPos, /*width = */ 6, "____+0"},
-      {0, kRight | kUpper, /*width = */ 0, "0"},
-      {0, kRight | kUpper, /*width = */ 6, "_____0"},
-      {0, kRight | kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kRight | kUpper | kPos, /*width = */ 6, "____+0"},
-      {0, kRight | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kRight | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kRight | kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kRight | kUpper | kBase | kPos, /*width = */ 6, "____+0"},
-      {0, kDec, /*width = */ 0, "0"},
-      {0, kDec, /*width = */ 6, "_____0"},
-      {0, kDec | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kPos, /*width = */ 6, "____+0"},
-      {0, kDec | kBase, /*width = */ 0, "0"},
-      {0, kDec | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kBase | kPos, /*width = */ 6, "____+0"},
-      {0, kDec | kUpper, /*width = */ 0, "0"},
-      {0, kDec | kUpper, /*width = */ 6, "_____0"},
-      {0, kDec | kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kUpper | kPos, /*width = */ 6, "____+0"},
-      {0, kDec | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kDec | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kUpper | kBase | kPos, /*width = */ 6, "____+0"},
-      {0, kDec | kLeft, /*width = */ 0, "0"},
-      {0, kDec | kLeft, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kLeft | kPos, /*width = */ 6, "+0____"},
-      {0, kDec | kLeft | kBase, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kBase, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kLeft | kBase | kPos, /*width = */ 6, "+0____"},
-      {0, kDec | kLeft | kUpper, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kUpper, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kLeft | kUpper | kPos, /*width = */ 6, "+0____"},
-      {0, kDec | kLeft | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kUpper | kBase, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kLeft | kUpper | kBase | kPos, /*width = */ 6, "+0____"},
-      {0, kDec | kInt, /*width = */ 0, "0"},
-      {0, kDec | kInt, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kInt | kPos, /*width = */ 6, "+____0"},
-      {0, kDec | kInt | kBase, /*width = */ 0, "0"},
-      {0, kDec | kInt | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kInt | kBase | kPos, /*width = */ 6, "+____0"},
-      {0, kDec | kInt | kUpper, /*width = */ 0, "0"},
-      {0, kDec | kInt | kUpper, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kUpper | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kInt | kUpper | kPos, /*width = */ 6, "+____0"},
-      {0, kDec | kInt | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kDec | kInt | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kUpper | kBase | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kInt | kUpper | kBase | kPos, /*width = */ 6, "+____0"},
-      {0, kDec | kRight, /*width = */ 0, "0"},
-      {0, kDec | kRight, /*width = */ 6, "_____0"},
-      {0, kDec | kRight | kPos, /*width = */ 0, "+0"},
-      {0, kDec | kRight | kPos, /*width = */ 6, "____+0"},
-      {0, kDec | kRight | kBase, /*width = */ 0, "0"},
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-      {42, kOct | kInt | kUpper | kBase, /*width = */ 0, "052"},
-      {42, kOct | kInt | kUpper | kBase, /*width = */ 6, "___052"},
-      {42, kOct | kInt | kUpper | kBase | kPos, /*width = */ 0, "052"},
-      {42, kOct | kInt | kUpper | kBase | kPos, /*width = */ 6, "___052"},
-      {42, kOct | kRight, /*width = */ 0, "52"},
-      {42, kOct | kRight, /*width = */ 6, "____52"},
-      {42, kOct | kRight | kPos, /*width = */ 0, "52"},
-      {42, kOct | kRight | kPos, /*width = */ 6, "____52"},
-      {42, kOct | kRight | kBase, /*width = */ 0, "052"},
-      {42, kOct | kRight | kBase, /*width = */ 6, "___052"},
-      {42, kOct | kRight | kBase | kPos, /*width = */ 0, "052"},
-      {42, kOct | kRight | kBase | kPos, /*width = */ 6, "___052"},
-      {42, kOct | kRight | kUpper, /*width = */ 0, "52"},
-      {42, kOct | kRight | kUpper, /*width = */ 6, "____52"},
-      {42, kOct | kRight | kUpper | kPos, /*width = */ 0, "52"},
-      {42, kOct | kRight | kUpper | kPos, /*width = */ 6, "____52"},
-      {42, kOct | kRight | kUpper | kBase, /*width = */ 0, "052"},
-      {42, kOct | kRight | kUpper | kBase, /*width = */ 6, "___052"},
-      {42, kOct | kRight | kUpper | kBase | kPos, /*width = */ 0, "052"},
-      {42, kOct | kRight | kUpper | kBase | kPos, /*width = */ 6, "___052"},
-      {42, kHex, /*width = */ 0, "2a"},
-      {42, kHex, /*width = */ 6, "____2a"},
-      {42, kHex | kPos, /*width = */ 0, "2a"},
-      {42, kHex | kPos, /*width = */ 6, "____2a"},
-      {42, kHex | kBase, /*width = */ 0, "0x2a"},
-      {42, kHex | kBase, /*width = */ 6, "__0x2a"},
-      {42, kHex | kBase | kPos, /*width = */ 0, "0x2a"},
-      {42, kHex | kBase | kPos, /*width = */ 6, "__0x2a"},
-      {42, kHex | kUpper, /*width = */ 0, "2A"},
-      {42, kHex | kUpper, /*width = */ 6, "____2A"},
-      {42, kHex | kUpper | kPos, /*width = */ 0, "2A"},
-      {42, kHex | kUpper | kPos, /*width = */ 6, "____2A"},
-      {42, kHex | kUpper | kBase, /*width = */ 0, "0X2A"},
-      {42, kHex | kUpper | kBase, /*width = */ 6, "__0X2A"},
-      {42, kHex | kUpper | kBase | kPos, /*width = */ 0, "0X2A"},
-      {42, kHex | kUpper | kBase | kPos, /*width = */ 6, "__0X2A"},
-      {42, kHex | kLeft, /*width = */ 0, "2a"},
-      {42, kHex | kLeft, /*width = */ 6, "2a____"},
-      {42, kHex | kLeft | kPos, /*width = */ 0, "2a"},
-      {42, kHex | kLeft | kPos, /*width = */ 6, "2a____"},
-      {42, kHex | kLeft | kBase, /*width = */ 0, "0x2a"},
-      {42, kHex | kLeft | kBase, /*width = */ 6, "0x2a__"},
-      {42, kHex | kLeft | kBase | kPos, /*width = */ 0, "0x2a"},
-      {42, kHex | kLeft | kBase | kPos, /*width = */ 6, "0x2a__"},
-      {42, kHex | kLeft | kUpper, /*width = */ 0, "2A"},
-      {42, kHex | kLeft | kUpper, /*width = */ 6, "2A____"},
-      {42, kHex | kLeft | kUpper | kPos, /*width = */ 0, "2A"},
-      {42, kHex | kLeft | kUpper | kPos, /*width = */ 6, "2A____"},
-      {42, kHex | kLeft | kUpper | kBase, /*width = */ 0, "0X2A"},
-      {42, kHex | kLeft | kUpper | kBase, /*width = */ 6, "0X2A__"},
-      {42, kHex | kLeft | kUpper | kBase | kPos, /*width = */ 0, "0X2A"},
-      {42, kHex | kLeft | kUpper | kBase | kPos, /*width = */ 6, "0X2A__"},
-      {42, kHex | kInt, /*width = */ 0, "2a"},
-      {42, kHex | kInt, /*width = */ 6, "____2a"},
-      {42, kHex | kInt | kPos, /*width = */ 0, "2a"},
-      {42, kHex | kInt | kPos, /*width = */ 6, "____2a"},
-      {42, kHex | kInt | kBase, /*width = */ 0, "0x2a"},
-      {42, kHex | kInt | kBase, /*width = */ 6, "0x__2a"},
-      {42, kHex | kInt | kBase | kPos, /*width = */ 0, "0x2a"},
-      {42, kHex | kInt | kBase | kPos, /*width = */ 6, "0x__2a"},
-      {42, kHex | kInt | kUpper, /*width = */ 0, "2A"},
-      {42, kHex | kInt | kUpper, /*width = */ 6, "____2A"},
-      {42, kHex | kInt | kUpper | kPos, /*width = */ 0, "2A"},
-      {42, kHex | kInt | kUpper | kPos, /*width = */ 6, "____2A"},
-      {42, kHex | kInt | kUpper | kBase, /*width = */ 0, "0X2A"},
-      {42, kHex | kInt | kUpper | kBase, /*width = */ 6, "0X__2A"},
-      {42, kHex | kInt | kUpper | kBase | kPos, /*width = */ 0, "0X2A"},
-      {42, kHex | kInt | kUpper | kBase | kPos, /*width = */ 6, "0X__2A"},
-      {42, kHex | kRight, /*width = */ 0, "2a"},
-      {42, kHex | kRight, /*width = */ 6, "____2a"},
-      {42, kHex | kRight | kPos, /*width = */ 0, "2a"},
-      {42, kHex | kRight | kPos, /*width = */ 6, "____2a"},
-      {42, kHex | kRight | kBase, /*width = */ 0, "0x2a"},
-      {42, kHex | kRight | kBase, /*width = */ 6, "__0x2a"},
-      {42, kHex | kRight | kBase | kPos, /*width = */ 0, "0x2a"},
-      {42, kHex | kRight | kBase | kPos, /*width = */ 6, "__0x2a"},
-      {42, kHex | kRight | kUpper, /*width = */ 0, "2A"},
-      {42, kHex | kRight | kUpper, /*width = */ 6, "____2A"},
-      {42, kHex | kRight | kUpper | kPos, /*width = */ 0, "2A"},
-      {42, kHex | kRight | kUpper | kPos, /*width = */ 6, "____2A"},
-      {42, kHex | kRight | kUpper | kBase, /*width = */ 0, "0X2A"},
-      {42, kHex | kRight | kUpper | kBase, /*width = */ 6, "__0X2A"},
-      {42, kHex | kRight | kUpper | kBase | kPos, /*width = */ 0, "0X2A"},
-      {42, kHex | kRight | kUpper | kBase | kPos, /*width = */ 6, "__0X2A"},
-      {-321, std::ios_base::fmtflags(), /*width = */ 0, "-321"},
-      {-321, std::ios_base::fmtflags(), /*width = */ 6, "__-321"},
-      {-321, kPos, /*width = */ 0, "-321"},
-      {-321, kPos, /*width = */ 6, "__-321"},
-      {-321, kBase, /*width = */ 0, "-321"},
-      {-321, kBase, /*width = */ 6, "__-321"},
-      {-321, kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kUpper, /*width = */ 0, "-321"},
-      {-321, kUpper, /*width = */ 6, "__-321"},
-      {-321, kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kUpper | kPos, /*width = */ 6, "__-321"},
-      {-321, kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kUpper | kBase, /*width = */ 6, "__-321"},
-      {-321, kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kUpper | kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kLeft, /*width = */ 0, "-321"},
-      {-321, kLeft, /*width = */ 6, "-321__"},
-      {-321, kLeft | kPos, /*width = */ 0, "-321"},
-      {-321, kLeft | kPos, /*width = */ 6, "-321__"},
-      {-321, kLeft | kBase, /*width = */ 0, "-321"},
-      {-321, kLeft | kBase, /*width = */ 6, "-321__"},
-      {-321, kLeft | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kLeft | kBase | kPos, /*width = */ 6, "-321__"},
-      {-321, kLeft | kUpper, /*width = */ 0, "-321"},
-      {-321, kLeft | kUpper, /*width = */ 6, "-321__"},
-      {-321, kLeft | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kLeft | kUpper | kPos, /*width = */ 6, "-321__"},
-      {-321, kLeft | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kLeft | kUpper | kBase, /*width = */ 6, "-321__"},
-      {-321, kLeft | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kLeft | kUpper | kBase | kPos, /*width = */ 6, "-321__"},
-      {-321, kInt, /*width = */ 0, "-321"},
-      {-321, kInt, /*width = */ 6, "-__321"},
-      {-321, kInt | kPos, /*width = */ 0, "-321"},
-      {-321, kInt | kPos, /*width = */ 6, "-__321"},
-      {-321, kInt | kBase, /*width = */ 0, "-321"},
-      {-321, kInt | kBase, /*width = */ 6, "-__321"},
-      {-321, kInt | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kInt | kBase | kPos, /*width = */ 6, "-__321"},
-      {-321, kInt | kUpper, /*width = */ 0, "-321"},
-      {-321, kInt | kUpper, /*width = */ 6, "-__321"},
-      {-321, kInt | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kInt | kUpper | kPos, /*width = */ 6, "-__321"},
-      {-321, kInt | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kInt | kUpper | kBase, /*width = */ 6, "-__321"},
-      {-321, kInt | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kInt | kUpper | kBase | kPos, /*width = */ 6, "-__321"},
-      {-321, kRight, /*width = */ 0, "-321"},
-      {-321, kRight, /*width = */ 6, "__-321"},
-      {-321, kRight | kPos, /*width = */ 0, "-321"},
-      {-321, kRight | kPos, /*width = */ 6, "__-321"},
-      {-321, kRight | kBase, /*width = */ 0, "-321"},
-      {-321, kRight | kBase, /*width = */ 6, "__-321"},
-      {-321, kRight | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kRight | kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kRight | kUpper, /*width = */ 0, "-321"},
-      {-321, kRight | kUpper, /*width = */ 6, "__-321"},
-      {-321, kRight | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kRight | kUpper | kPos, /*width = */ 6, "__-321"},
-      {-321, kRight | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kRight | kUpper | kBase, /*width = */ 6, "__-321"},
-      {-321, kRight | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kRight | kUpper | kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec, /*width = */ 0, "-321"},
-      {-321, kDec, /*width = */ 6, "__-321"},
-      {-321, kDec | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kBase, /*width = */ 6, "__-321"},
-      {-321, kDec | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kUpper, /*width = */ 0, "-321"},
-      {-321, kDec | kUpper, /*width = */ 6, "__-321"},
-      {-321, kDec | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kUpper | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kUpper | kBase, /*width = */ 6, "__-321"},
-      {-321, kDec | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kUpper | kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kLeft, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kPos, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kBase, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kBase | kPos, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kUpper, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kUpper, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kUpper | kPos, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kUpper | kBase, /*width = */ 6, "-321__"},
-      {-321, kDec | kLeft | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kLeft | kUpper | kBase | kPos, /*width = */ 6, "-321__"},
-      {-321, kDec | kInt, /*width = */ 0, "-321"},
-      {-321, kDec | kInt, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kPos, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kBase, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kBase | kPos, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kUpper, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kUpper, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kUpper | kPos, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kUpper | kBase, /*width = */ 6, "-__321"},
-      {-321, kDec | kInt | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kInt | kUpper | kBase | kPos, /*width = */ 6, "-__321"},
-      {-321, kDec | kRight, /*width = */ 0, "-321"},
-      {-321, kDec | kRight, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kBase, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kBase | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kUpper, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kUpper, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kUpper | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kUpper | kPos, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kUpper | kBase, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kUpper | kBase, /*width = */ 6, "__-321"},
-      {-321, kDec | kRight | kUpper | kBase | kPos, /*width = */ 0, "-321"},
-      {-321, kDec | kRight | kUpper | kBase | kPos, /*width = */ 6, "__-321"}};
-}
-
-std::vector<Uint128TestCase> GetUint128FormatCases() {
-  return {
-      {0, std::ios_base::fmtflags(), /*width = */ 0, "0"},
-      {0, std::ios_base::fmtflags(), /*width = */ 6, "_____0"},
-      {0, kPos, /*width = */ 0, "0"},
-      {0, kPos, /*width = */ 6, "_____0"},
-      {0, kBase, /*width = */ 0, "0"},
-      {0, kBase, /*width = */ 6, "_____0"},
-      {0, kBase | kPos, /*width = */ 0, "0"},
-      {0, kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kUpper, /*width = */ 0, "0"},
-      {0, kUpper, /*width = */ 6, "_____0"},
-      {0, kUpper | kPos, /*width = */ 0, "0"},
-      {0, kUpper | kPos, /*width = */ 6, "_____0"},
-      {0, kUpper | kBase, /*width = */ 0, "0"},
-      {0, kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kUpper | kBase | kPos, /*width = */ 0, "0"},
-      {0, kUpper | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kLeft, /*width = */ 0, "0"},
-      {0, kLeft, /*width = */ 6, "0_____"},
-      {0, kLeft | kPos, /*width = */ 0, "0"},
-      {0, kLeft | kPos, /*width = */ 6, "0_____"},
-      {0, kLeft | kBase, /*width = */ 0, "0"},
-      {0, kLeft | kBase, /*width = */ 6, "0_____"},
-      {0, kLeft | kBase | kPos, /*width = */ 0, "0"},
-      {0, kLeft | kBase | kPos, /*width = */ 6, "0_____"},
-      {0, kLeft | kUpper, /*width = */ 0, "0"},
-      {0, kLeft | kUpper, /*width = */ 6, "0_____"},
-      {0, kLeft | kUpper | kPos, /*width = */ 0, "0"},
-      {0, kLeft | kUpper | kPos, /*width = */ 6, "0_____"},
-      {0, kLeft | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kLeft | kUpper | kBase, /*width = */ 6, "0_____"},
-      {0, kLeft | kUpper | kBase | kPos, /*width = */ 0, "0"},
-      {0, kLeft | kUpper | kBase | kPos, /*width = */ 6, "0_____"},
-      {0, kInt, /*width = */ 0, "0"},
-      {0, kInt, /*width = */ 6, "_____0"},
-      {0, kInt | kPos, /*width = */ 0, "0"},
-      {0, kInt | kPos, /*width = */ 6, "_____0"},
-      {0, kInt | kBase, /*width = */ 0, "0"},
-      {0, kInt | kBase, /*width = */ 6, "_____0"},
-      {0, kInt | kBase | kPos, /*width = */ 0, "0"},
-      {0, kInt | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kInt | kUpper, /*width = */ 0, "0"},
-      {0, kInt | kUpper, /*width = */ 6, "_____0"},
-      {0, kInt | kUpper | kPos, /*width = */ 0, "0"},
-      {0, kInt | kUpper | kPos, /*width = */ 6, "_____0"},
-      {0, kInt | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kInt | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kInt | kUpper | kBase | kPos, /*width = */ 0, "0"},
-      {0, kInt | kUpper | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kRight, /*width = */ 0, "0"},
-      {0, kRight, /*width = */ 6, "_____0"},
-      {0, kRight | kPos, /*width = */ 0, "0"},
-      {0, kRight | kPos, /*width = */ 6, "_____0"},
-      {0, kRight | kBase, /*width = */ 0, "0"},
-      {0, kRight | kBase, /*width = */ 6, "_____0"},
-      {0, kRight | kBase | kPos, /*width = */ 0, "0"},
-      {0, kRight | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kRight | kUpper, /*width = */ 0, "0"},
-      {0, kRight | kUpper, /*width = */ 6, "_____0"},
-      {0, kRight | kUpper | kPos, /*width = */ 0, "0"},
-      {0, kRight | kUpper | kPos, /*width = */ 6, "_____0"},
-      {0, kRight | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kRight | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kRight | kUpper | kBase | kPos, /*width = */ 0, "0"},
-      {0, kRight | kUpper | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kDec, /*width = */ 0, "0"},
-      {0, kDec, /*width = */ 6, "_____0"},
-      {0, kDec | kPos, /*width = */ 0, "0"},
-      {0, kDec | kPos, /*width = */ 6, "_____0"},
-      {0, kDec | kBase, /*width = */ 0, "0"},
-      {0, kDec | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kBase | kPos, /*width = */ 0, "0"},
-      {0, kDec | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kDec | kUpper, /*width = */ 0, "0"},
-      {0, kDec | kUpper, /*width = */ 6, "_____0"},
-      {0, kDec | kUpper | kPos, /*width = */ 0, "0"},
-      {0, kDec | kUpper | kPos, /*width = */ 6, "_____0"},
-      {0, kDec | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kDec | kUpper | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kUpper | kBase | kPos, /*width = */ 0, "0"},
-      {0, kDec | kUpper | kBase | kPos, /*width = */ 6, "_____0"},
-      {0, kDec | kLeft, /*width = */ 0, "0"},
-      {0, kDec | kLeft, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kPos, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kPos, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kBase, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kBase, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kBase | kPos, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kBase | kPos, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kUpper, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kUpper, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kUpper | kPos, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kUpper | kPos, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kUpper | kBase, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kUpper | kBase, /*width = */ 6, "0_____"},
-      {0, kDec | kLeft | kUpper | kBase | kPos, /*width = */ 0, "0"},
-      {0, kDec | kLeft | kUpper | kBase | kPos, /*width = */ 6, "0_____"},
-      {0, kDec | kInt, /*width = */ 0, "0"},
-      {0, kDec | kInt, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kPos, /*width = */ 0, "0"},
-      {0, kDec | kInt | kPos, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kBase, /*width = */ 0, "0"},
-      {0, kDec | kInt | kBase, /*width = */ 6, "_____0"},
-      {0, kDec | kInt | kBase | kPos, /*width = */ 0, "0"},
-      {0, kDec | kInt | kBase | kPos, /*width = */ 6, "_____0"},
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-      {37, kOct | kLeft | kUpper | kBase | kPos, /*width = */ 6, "045___"},
-      {37, kOct | kInt, /*width = */ 0, "45"},
-      {37, kOct | kInt, /*width = */ 6, "____45"},
-      {37, kOct | kInt | kPos, /*width = */ 0, "45"},
-      {37, kOct | kInt | kPos, /*width = */ 6, "____45"},
-      {37, kOct | kInt | kBase, /*width = */ 0, "045"},
-      {37, kOct | kInt | kBase, /*width = */ 6, "___045"},
-      {37, kOct | kInt | kBase | kPos, /*width = */ 0, "045"},
-      {37, kOct | kInt | kBase | kPos, /*width = */ 6, "___045"},
-      {37, kOct | kInt | kUpper, /*width = */ 0, "45"},
-      {37, kOct | kInt | kUpper, /*width = */ 6, "____45"},
-      {37, kOct | kInt | kUpper | kPos, /*width = */ 0, "45"},
-      {37, kOct | kInt | kUpper | kPos, /*width = */ 6, "____45"},
-      {37, kOct | kInt | kUpper | kBase, /*width = */ 0, "045"},
-      {37, kOct | kInt | kUpper | kBase, /*width = */ 6, "___045"},
-      {37, kOct | kInt | kUpper | kBase | kPos, /*width = */ 0, "045"},
-      {37, kOct | kInt | kUpper | kBase | kPos, /*width = */ 6, "___045"},
-      {37, kOct | kRight, /*width = */ 0, "45"},
-      {37, kOct | kRight, /*width = */ 6, "____45"},
-      {37, kOct | kRight | kPos, /*width = */ 0, "45"},
-      {37, kOct | kRight | kPos, /*width = */ 6, "____45"},
-      {37, kOct | kRight | kBase, /*width = */ 0, "045"},
-      {37, kOct | kRight | kBase, /*width = */ 6, "___045"},
-      {37, kOct | kRight | kBase | kPos, /*width = */ 0, "045"},
-      {37, kOct | kRight | kBase | kPos, /*width = */ 6, "___045"},
-      {37, kOct | kRight | kUpper, /*width = */ 0, "45"},
-      {37, kOct | kRight | kUpper, /*width = */ 6, "____45"},
-      {37, kOct | kRight | kUpper | kPos, /*width = */ 0, "45"},
-      {37, kOct | kRight | kUpper | kPos, /*width = */ 6, "____45"},
-      {37, kOct | kRight | kUpper | kBase, /*width = */ 0, "045"},
-      {37, kOct | kRight | kUpper | kBase, /*width = */ 6, "___045"},
-      {37, kOct | kRight | kUpper | kBase | kPos, /*width = */ 0, "045"},
-      {37, kOct | kRight | kUpper | kBase | kPos, /*width = */ 6, "___045"},
-      {37, kHex, /*width = */ 0, "25"},
-      {37, kHex, /*width = */ 6, "____25"},
-      {37, kHex | kPos, /*width = */ 0, "25"},
-      {37, kHex | kPos, /*width = */ 6, "____25"},
-      {37, kHex | kBase, /*width = */ 0, "0x25"},
-      {37, kHex | kBase, /*width = */ 6, "__0x25"},
-      {37, kHex | kBase | kPos, /*width = */ 0, "0x25"},
-      {37, kHex | kBase | kPos, /*width = */ 6, "__0x25"},
-      {37, kHex | kUpper, /*width = */ 0, "25"},
-      {37, kHex | kUpper, /*width = */ 6, "____25"},
-      {37, kHex | kUpper | kPos, /*width = */ 0, "25"},
-      {37, kHex | kUpper | kPos, /*width = */ 6, "____25"},
-      {37, kHex | kUpper | kBase, /*width = */ 0, "0X25"},
-      {37, kHex | kUpper | kBase, /*width = */ 6, "__0X25"},
-      {37, kHex | kUpper | kBase | kPos, /*width = */ 0, "0X25"},
-      {37, kHex | kUpper | kBase | kPos, /*width = */ 6, "__0X25"},
-      {37, kHex | kLeft, /*width = */ 0, "25"},
-      {37, kHex | kLeft, /*width = */ 6, "25____"},
-      {37, kHex | kLeft | kPos, /*width = */ 0, "25"},
-      {37, kHex | kLeft | kPos, /*width = */ 6, "25____"},
-      {37, kHex | kLeft | kBase, /*width = */ 0, "0x25"},
-      {37, kHex | kLeft | kBase, /*width = */ 6, "0x25__"},
-      {37, kHex | kLeft | kBase | kPos, /*width = */ 0, "0x25"},
-      {37, kHex | kLeft | kBase | kPos, /*width = */ 6, "0x25__"},
-      {37, kHex | kLeft | kUpper, /*width = */ 0, "25"},
-      {37, kHex | kLeft | kUpper, /*width = */ 6, "25____"},
-      {37, kHex | kLeft | kUpper | kPos, /*width = */ 0, "25"},
-      {37, kHex | kLeft | kUpper | kPos, /*width = */ 6, "25____"},
-      {37, kHex | kLeft | kUpper | kBase, /*width = */ 0, "0X25"},
-      {37, kHex | kLeft | kUpper | kBase, /*width = */ 6, "0X25__"},
-      {37, kHex | kLeft | kUpper | kBase | kPos, /*width = */ 0, "0X25"},
-      {37, kHex | kLeft | kUpper | kBase | kPos, /*width = */ 6, "0X25__"},
-      {37, kHex | kInt, /*width = */ 0, "25"},
-      {37, kHex | kInt, /*width = */ 6, "____25"},
-      {37, kHex | kInt | kPos, /*width = */ 0, "25"},
-      {37, kHex | kInt | kPos, /*width = */ 6, "____25"},
-      {37, kHex | kInt | kBase, /*width = */ 0, "0x25"},
-      {37, kHex | kInt | kBase, /*width = */ 6, "0x__25"},
-      {37, kHex | kInt | kBase | kPos, /*width = */ 0, "0x25"},
-      {37, kHex | kInt | kBase | kPos, /*width = */ 6, "0x__25"},
-      {37, kHex | kInt | kUpper, /*width = */ 0, "25"},
-      {37, kHex | kInt | kUpper, /*width = */ 6, "____25"},
-      {37, kHex | kInt | kUpper | kPos, /*width = */ 0, "25"},
-      {37, kHex | kInt | kUpper | kPos, /*width = */ 6, "____25"},
-      {37, kHex | kInt | kUpper | kBase, /*width = */ 0, "0X25"},
-      {37, kHex | kInt | kUpper | kBase, /*width = */ 6, "0X__25"},
-      {37, kHex | kInt | kUpper | kBase | kPos, /*width = */ 0, "0X25"},
-      {37, kHex | kInt | kUpper | kBase | kPos, /*width = */ 6, "0X__25"},
-      {37, kHex | kRight, /*width = */ 0, "25"},
-      {37, kHex | kRight, /*width = */ 6, "____25"},
-      {37, kHex | kRight | kPos, /*width = */ 0, "25"},
-      {37, kHex | kRight | kPos, /*width = */ 6, "____25"},
-      {37, kHex | kRight | kBase, /*width = */ 0, "0x25"},
-      {37, kHex | kRight | kBase, /*width = */ 6, "__0x25"},
-      {37, kHex | kRight | kBase | kPos, /*width = */ 0, "0x25"},
-      {37, kHex | kRight | kBase | kPos, /*width = */ 6, "__0x25"},
-      {37, kHex | kRight | kUpper, /*width = */ 0, "25"},
-      {37, kHex | kRight | kUpper, /*width = */ 6, "____25"},
-      {37, kHex | kRight | kUpper | kPos, /*width = */ 0, "25"},
-      {37, kHex | kRight | kUpper | kPos, /*width = */ 6, "____25"},
-      {37, kHex | kRight | kUpper | kBase, /*width = */ 0, "0X25"},
-      {37, kHex | kRight | kUpper | kBase, /*width = */ 6, "__0X25"},
-      {37, kHex | kRight | kUpper | kBase | kPos, /*width = */ 0, "0X25"},
-      {37, kHex | kRight | kUpper | kBase | kPos, /*width = */ 6, "__0X25"}};
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/numeric/int128_test.cc b/third_party/abseil/absl/numeric/int128_test.cc
deleted file mode 100644
index bc86c71..0000000
--- a/third_party/abseil/absl/numeric/int128_test.cc
+++ /dev/null
@@ -1,1225 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/numeric/int128.h"
-
-#include <algorithm>
-#include <limits>
-#include <random>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/cycleclock.h"
-#include "absl/hash/hash_testing.h"
-#include "absl/meta/type_traits.h"
-
-#if defined(_MSC_VER) && _MSC_VER == 1900
-// Disable "unary minus operator applied to unsigned type" warnings in Microsoft
-// Visual C++ 14 (2015).
-#pragma warning(disable:4146)
-#endif
-
-namespace {
-
-template <typename T>
-class Uint128IntegerTraitsTest : public ::testing::Test {};
-typedef ::testing::Types<bool, char, signed char, unsigned char, char16_t,
-                         char32_t, wchar_t,
-                         short,           // NOLINT(runtime/int)
-                         unsigned short,  // NOLINT(runtime/int)
-                         int, unsigned int,
-                         long,                // NOLINT(runtime/int)
-                         unsigned long,       // NOLINT(runtime/int)
-                         long long,           // NOLINT(runtime/int)
-                         unsigned long long>  // NOLINT(runtime/int)
-    IntegerTypes;
-
-template <typename T>
-class Uint128FloatTraitsTest : public ::testing::Test {};
-typedef ::testing::Types<float, double, long double> FloatingPointTypes;
-
-TYPED_TEST_SUITE(Uint128IntegerTraitsTest, IntegerTypes);
-
-TYPED_TEST(Uint128IntegerTraitsTest, ConstructAssignTest) {
-  static_assert(std::is_constructible<absl::uint128, TypeParam>::value,
-                "absl::uint128 must be constructible from TypeParam");
-  static_assert(std::is_assignable<absl::uint128&, TypeParam>::value,
-                "absl::uint128 must be assignable from TypeParam");
-  static_assert(!std::is_assignable<TypeParam&, absl::uint128>::value,
-                "TypeParam must not be assignable from absl::uint128");
-}
-
-TYPED_TEST_SUITE(Uint128FloatTraitsTest, FloatingPointTypes);
-
-TYPED_TEST(Uint128FloatTraitsTest, ConstructAssignTest) {
-  static_assert(std::is_constructible<absl::uint128, TypeParam>::value,
-                "absl::uint128 must be constructible from TypeParam");
-  static_assert(!std::is_assignable<absl::uint128&, TypeParam>::value,
-                "absl::uint128 must not be assignable from TypeParam");
-  static_assert(!std::is_assignable<TypeParam&, absl::uint128>::value,
-                "TypeParam must not be assignable from absl::uint128");
-}
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-// These type traits done separately as TYPED_TEST requires typeinfo, and not
-// all platforms have this for __int128 even though they define the type.
-TEST(Uint128, IntrinsicTypeTraitsTest) {
-  static_assert(std::is_constructible<absl::uint128, __int128>::value,
-                "absl::uint128 must be constructible from __int128");
-  static_assert(std::is_assignable<absl::uint128&, __int128>::value,
-                "absl::uint128 must be assignable from __int128");
-  static_assert(!std::is_assignable<__int128&, absl::uint128>::value,
-                "__int128 must not be assignable from absl::uint128");
-
-  static_assert(std::is_constructible<absl::uint128, unsigned __int128>::value,
-                "absl::uint128 must be constructible from unsigned __int128");
-  static_assert(std::is_assignable<absl::uint128&, unsigned __int128>::value,
-                "absl::uint128 must be assignable from unsigned __int128");
-  static_assert(!std::is_assignable<unsigned __int128&, absl::uint128>::value,
-                "unsigned __int128 must not be assignable from absl::uint128");
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-TEST(Uint128, TrivialTraitsTest) {
-  static_assert(absl::is_trivially_default_constructible<absl::uint128>::value,
-                "");
-  static_assert(absl::is_trivially_copy_constructible<absl::uint128>::value,
-                "");
-  static_assert(absl::is_trivially_copy_assignable<absl::uint128>::value, "");
-  static_assert(std::is_trivially_destructible<absl::uint128>::value, "");
-}
-
-TEST(Uint128, AllTests) {
-  absl::uint128 zero = 0;
-  absl::uint128 one = 1;
-  absl::uint128 one_2arg = absl::MakeUint128(0, 1);
-  absl::uint128 two = 2;
-  absl::uint128 three = 3;
-  absl::uint128 big = absl::MakeUint128(2000, 2);
-  absl::uint128 big_minus_one = absl::MakeUint128(2000, 1);
-  absl::uint128 bigger = absl::MakeUint128(2001, 1);
-  absl::uint128 biggest = absl::Uint128Max();
-  absl::uint128 high_low = absl::MakeUint128(1, 0);
-  absl::uint128 low_high =
-      absl::MakeUint128(0, std::numeric_limits<uint64_t>::max());
-  EXPECT_LT(one, two);
-  EXPECT_GT(two, one);
-  EXPECT_LT(one, big);
-  EXPECT_LT(one, big);
-  EXPECT_EQ(one, one_2arg);
-  EXPECT_NE(one, two);
-  EXPECT_GT(big, one);
-  EXPECT_GE(big, two);
-  EXPECT_GE(big, big_minus_one);
-  EXPECT_GT(big, big_minus_one);
-  EXPECT_LT(big_minus_one, big);
-  EXPECT_LE(big_minus_one, big);
-  EXPECT_NE(big_minus_one, big);
-  EXPECT_LT(big, biggest);
-  EXPECT_LE(big, biggest);
-  EXPECT_GT(biggest, big);
-  EXPECT_GE(biggest, big);
-  EXPECT_EQ(big, ~~big);
-  EXPECT_EQ(one, one | one);
-  EXPECT_EQ(big, big | big);
-  EXPECT_EQ(one, one | zero);
-  EXPECT_EQ(one, one & one);
-  EXPECT_EQ(big, big & big);
-  EXPECT_EQ(zero, one & zero);
-  EXPECT_EQ(zero, big & ~big);
-  EXPECT_EQ(zero, one ^ one);
-  EXPECT_EQ(zero, big ^ big);
-  EXPECT_EQ(one, one ^ zero);
-
-  // Shift operators.
-  EXPECT_EQ(big, big << 0);
-  EXPECT_EQ(big, big >> 0);
-  EXPECT_GT(big << 1, big);
-  EXPECT_LT(big >> 1, big);
-  EXPECT_EQ(big, (big << 10) >> 10);
-  EXPECT_EQ(big, (big >> 1) << 1);
-  EXPECT_EQ(one, (one << 80) >> 80);
-  EXPECT_EQ(zero, (one >> 80) << 80);
-
-  // Shift assignments.
-  absl::uint128 big_copy = big;
-  EXPECT_EQ(big << 0, big_copy <<= 0);
-  big_copy = big;
-  EXPECT_EQ(big >> 0, big_copy >>= 0);
-  big_copy = big;
-  EXPECT_EQ(big << 1, big_copy <<= 1);
-  big_copy = big;
-  EXPECT_EQ(big >> 1, big_copy >>= 1);
-  big_copy = big;
-  EXPECT_EQ(big << 10, big_copy <<= 10);
-  big_copy = big;
-  EXPECT_EQ(big >> 10, big_copy >>= 10);
-  big_copy = big;
-  EXPECT_EQ(big << 64, big_copy <<= 64);
-  big_copy = big;
-  EXPECT_EQ(big >> 64, big_copy >>= 64);
-  big_copy = big;
-  EXPECT_EQ(big << 73, big_copy <<= 73);
-  big_copy = big;
-  EXPECT_EQ(big >> 73, big_copy >>= 73);
-
-  EXPECT_EQ(absl::Uint128High64(biggest), std::numeric_limits<uint64_t>::max());
-  EXPECT_EQ(absl::Uint128Low64(biggest), std::numeric_limits<uint64_t>::max());
-  EXPECT_EQ(zero + one, one);
-  EXPECT_EQ(one + one, two);
-  EXPECT_EQ(big_minus_one + one, big);
-  EXPECT_EQ(one - one, zero);
-  EXPECT_EQ(one - zero, one);
-  EXPECT_EQ(zero - one, biggest);
-  EXPECT_EQ(big - big, zero);
-  EXPECT_EQ(big - one, big_minus_one);
-  EXPECT_EQ(big + std::numeric_limits<uint64_t>::max(), bigger);
-  EXPECT_EQ(biggest + 1, zero);
-  EXPECT_EQ(zero - 1, biggest);
-  EXPECT_EQ(high_low - one, low_high);
-  EXPECT_EQ(low_high + one, high_low);
-  EXPECT_EQ(absl::Uint128High64((absl::uint128(1) << 64) - 1), 0);
-  EXPECT_EQ(absl::Uint128Low64((absl::uint128(1) << 64) - 1),
-            std::numeric_limits<uint64_t>::max());
-  EXPECT_TRUE(!!one);
-  EXPECT_TRUE(!!high_low);
-  EXPECT_FALSE(!!zero);
-  EXPECT_FALSE(!one);
-  EXPECT_FALSE(!high_low);
-  EXPECT_TRUE(!zero);
-  EXPECT_TRUE(zero == 0);       // NOLINT(readability/check)
-  EXPECT_FALSE(zero != 0);      // NOLINT(readability/check)
-  EXPECT_FALSE(one == 0);       // NOLINT(readability/check)
-  EXPECT_TRUE(one != 0);        // NOLINT(readability/check)
-  EXPECT_FALSE(high_low == 0);  // NOLINT(readability/check)
-  EXPECT_TRUE(high_low != 0);   // NOLINT(readability/check)
-
-  absl::uint128 test = zero;
-  EXPECT_EQ(++test, one);
-  EXPECT_EQ(test, one);
-  EXPECT_EQ(test++, one);
-  EXPECT_EQ(test, two);
-  EXPECT_EQ(test -= 2, zero);
-  EXPECT_EQ(test, zero);
-  EXPECT_EQ(test += 2, two);
-  EXPECT_EQ(test, two);
-  EXPECT_EQ(--test, one);
-  EXPECT_EQ(test, one);
-  EXPECT_EQ(test--, one);
-  EXPECT_EQ(test, zero);
-  EXPECT_EQ(test |= three, three);
-  EXPECT_EQ(test &= one, one);
-  EXPECT_EQ(test ^= three, two);
-  EXPECT_EQ(test >>= 1, one);
-  EXPECT_EQ(test <<= 1, two);
-
-  EXPECT_EQ(big, -(-big));
-  EXPECT_EQ(two, -((-one) - 1));
-  EXPECT_EQ(absl::Uint128Max(), -one);
-  EXPECT_EQ(zero, -zero);
-
-  EXPECT_EQ(absl::Uint128Max(), absl::kuint128max);
-}
-
-TEST(Uint128, ConversionTests) {
-  EXPECT_TRUE(absl::MakeUint128(1, 0));
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  unsigned __int128 intrinsic =
-      (static_cast<unsigned __int128>(0x3a5b76c209de76f6) << 64) +
-      0x1f25e1d63a2b46c5;
-  absl::uint128 custom =
-      absl::MakeUint128(0x3a5b76c209de76f6, 0x1f25e1d63a2b46c5);
-
-  EXPECT_EQ(custom, absl::uint128(intrinsic));
-  EXPECT_EQ(custom, absl::uint128(static_cast<__int128>(intrinsic)));
-  EXPECT_EQ(intrinsic, static_cast<unsigned __int128>(custom));
-  EXPECT_EQ(intrinsic, static_cast<__int128>(custom));
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-  // verify that an integer greater than 2**64 that can be stored precisely
-  // inside a double is converted to a absl::uint128 without loss of
-  // information.
-  double precise_double = 0x530e * std::pow(2.0, 64.0) + 0xda74000000000000;
-  absl::uint128 from_precise_double(precise_double);
-  absl::uint128 from_precise_ints =
-      absl::MakeUint128(0x530e, 0xda74000000000000);
-  EXPECT_EQ(from_precise_double, from_precise_ints);
-  EXPECT_DOUBLE_EQ(static_cast<double>(from_precise_ints), precise_double);
-
-  double approx_double = 0xffffeeeeddddcccc * std::pow(2.0, 64.0) +
-                         0xbbbbaaaa99998888;
-  absl::uint128 from_approx_double(approx_double);
-  EXPECT_DOUBLE_EQ(static_cast<double>(from_approx_double), approx_double);
-
-  double round_to_zero = 0.7;
-  double round_to_five = 5.8;
-  double round_to_nine = 9.3;
-  EXPECT_EQ(static_cast<absl::uint128>(round_to_zero), 0);
-  EXPECT_EQ(static_cast<absl::uint128>(round_to_five), 5);
-  EXPECT_EQ(static_cast<absl::uint128>(round_to_nine), 9);
-
-  absl::uint128 highest_precision_in_long_double =
-      ~absl::uint128{} >> (128 - std::numeric_limits<long double>::digits);
-  EXPECT_EQ(highest_precision_in_long_double,
-            static_cast<absl::uint128>(
-                static_cast<long double>(highest_precision_in_long_double)));
-  // Apply a mask just to make sure all the bits are the right place.
-  const absl::uint128 arbitrary_mask =
-      absl::MakeUint128(0xa29f622677ded751, 0xf8ca66add076f468);
-  EXPECT_EQ(highest_precision_in_long_double & arbitrary_mask,
-            static_cast<absl::uint128>(static_cast<long double>(
-                highest_precision_in_long_double & arbitrary_mask)));
-
-  EXPECT_EQ(static_cast<absl::uint128>(-0.1L), 0);
-}
-
-TEST(Uint128, OperatorAssignReturnRef) {
-  absl::uint128 v(1);
-  (v += 4) -= 3;
-  EXPECT_EQ(2, v);
-}
-
-TEST(Uint128, Multiply) {
-  absl::uint128 a, b, c;
-
-  // Zero test.
-  a = 0;
-  b = 0;
-  c = a * b;
-  EXPECT_EQ(0, c);
-
-  // Max carries.
-  a = absl::uint128(0) - 1;
-  b = absl::uint128(0) - 1;
-  c = a * b;
-  EXPECT_EQ(1, c);
-
-  // Self-operation with max carries.
-  c = absl::uint128(0) - 1;
-  c *= c;
-  EXPECT_EQ(1, c);
-
-  // 1-bit x 1-bit.
-  for (int i = 0; i < 64; ++i) {
-    for (int j = 0; j < 64; ++j) {
-      a = absl::uint128(1) << i;
-      b = absl::uint128(1) << j;
-      c = a * b;
-      EXPECT_EQ(absl::uint128(1) << (i + j), c);
-    }
-  }
-
-  // Verified with dc.
-  a = absl::MakeUint128(0xffffeeeeddddcccc, 0xbbbbaaaa99998888);
-  b = absl::MakeUint128(0x7777666655554444, 0x3333222211110000);
-  c = a * b;
-  EXPECT_EQ(absl::MakeUint128(0x530EDA741C71D4C3, 0xBF25975319080000), c);
-  EXPECT_EQ(0, c - b * a);
-  EXPECT_EQ(a*a - b*b, (a+b) * (a-b));
-
-  // Verified with dc.
-  a = absl::MakeUint128(0x0123456789abcdef, 0xfedcba9876543210);
-  b = absl::MakeUint128(0x02468ace13579bdf, 0xfdb97531eca86420);
-  c = a * b;
-  EXPECT_EQ(absl::MakeUint128(0x97a87f4f261ba3f2, 0x342d0bbf48948200), c);
-  EXPECT_EQ(0, c - b * a);
-  EXPECT_EQ(a*a - b*b, (a+b) * (a-b));
-}
-
-TEST(Uint128, AliasTests) {
-  absl::uint128 x1 = absl::MakeUint128(1, 2);
-  absl::uint128 x2 = absl::MakeUint128(2, 4);
-  x1 += x1;
-  EXPECT_EQ(x2, x1);
-
-  absl::uint128 x3 = absl::MakeUint128(1, static_cast<uint64_t>(1) << 63);
-  absl::uint128 x4 = absl::MakeUint128(3, 0);
-  x3 += x3;
-  EXPECT_EQ(x4, x3);
-}
-
-TEST(Uint128, DivideAndMod) {
-  using std::swap;
-
-  // a := q * b + r
-  absl::uint128 a, b, q, r;
-
-  // Zero test.
-  a = 0;
-  b = 123;
-  q = a / b;
-  r = a % b;
-  EXPECT_EQ(0, q);
-  EXPECT_EQ(0, r);
-
-  a = absl::MakeUint128(0x530eda741c71d4c3, 0xbf25975319080000);
-  q = absl::MakeUint128(0x4de2cab081, 0x14c34ab4676e4bab);
-  b = absl::uint128(0x1110001);
-  r = absl::uint128(0x3eb455);
-  ASSERT_EQ(a, q * b + r);  // Sanity-check.
-
-  absl::uint128 result_q, result_r;
-  result_q = a / b;
-  result_r = a % b;
-  EXPECT_EQ(q, result_q);
-  EXPECT_EQ(r, result_r);
-
-  // Try the other way around.
-  swap(q, b);
-  result_q = a / b;
-  result_r = a % b;
-  EXPECT_EQ(q, result_q);
-  EXPECT_EQ(r, result_r);
-  // Restore.
-  swap(b, q);
-
-  // Dividend < divisor; result should be q:0 r:<dividend>.
-  swap(a, b);
-  result_q = a / b;
-  result_r = a % b;
-  EXPECT_EQ(0, result_q);
-  EXPECT_EQ(a, result_r);
-  // Try the other way around.
-  swap(a, q);
-  result_q = a / b;
-  result_r = a % b;
-  EXPECT_EQ(0, result_q);
-  EXPECT_EQ(a, result_r);
-  // Restore.
-  swap(q, a);
-  swap(b, a);
-
-  // Try a large remainder.
-  b = a / 2 + 1;
-  absl::uint128 expected_r =
-      absl::MakeUint128(0x29876d3a0e38ea61, 0xdf92cba98c83ffff);
-  // Sanity checks.
-  ASSERT_EQ(a / 2 - 1, expected_r);
-  ASSERT_EQ(a, b + expected_r);
-  result_q = a / b;
-  result_r = a % b;
-  EXPECT_EQ(1, result_q);
-  EXPECT_EQ(expected_r, result_r);
-}
-
-TEST(Uint128, DivideAndModRandomInputs) {
-  const int kNumIters = 1 << 18;
-  std::minstd_rand random(testing::UnitTest::GetInstance()->random_seed());
-  std::uniform_int_distribution<uint64_t> uniform_uint64;
-  for (int i = 0; i < kNumIters; ++i) {
-    const absl::uint128 a =
-        absl::MakeUint128(uniform_uint64(random), uniform_uint64(random));
-    const absl::uint128 b =
-        absl::MakeUint128(uniform_uint64(random), uniform_uint64(random));
-    if (b == 0) {
-      continue;  // Avoid a div-by-zero.
-    }
-    const absl::uint128 q = a / b;
-    const absl::uint128 r = a % b;
-    ASSERT_EQ(a, b * q + r);
-  }
-}
-
-TEST(Uint128, ConstexprTest) {
-  constexpr absl::uint128 zero = absl::uint128();
-  constexpr absl::uint128 one = 1;
-  constexpr absl::uint128 minus_two = -2;
-  EXPECT_EQ(zero, absl::uint128(0));
-  EXPECT_EQ(one, absl::uint128(1));
-  EXPECT_EQ(minus_two, absl::MakeUint128(-1, -2));
-}
-
-TEST(Uint128, NumericLimitsTest) {
-  static_assert(std::numeric_limits<absl::uint128>::is_specialized, "");
-  static_assert(!std::numeric_limits<absl::uint128>::is_signed, "");
-  static_assert(std::numeric_limits<absl::uint128>::is_integer, "");
-  EXPECT_EQ(static_cast<int>(128 * std::log10(2)),
-            std::numeric_limits<absl::uint128>::digits10);
-  EXPECT_EQ(0, std::numeric_limits<absl::uint128>::min());
-  EXPECT_EQ(0, std::numeric_limits<absl::uint128>::lowest());
-  EXPECT_EQ(absl::Uint128Max(), std::numeric_limits<absl::uint128>::max());
-}
-
-TEST(Uint128, Hash) {
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly({
-      // Some simple values
-      absl::uint128{0},
-      absl::uint128{1},
-      ~absl::uint128{},
-      // 64 bit limits
-      absl::uint128{std::numeric_limits<int64_t>::max()},
-      absl::uint128{std::numeric_limits<uint64_t>::max()} + 0,
-      absl::uint128{std::numeric_limits<uint64_t>::max()} + 1,
-      absl::uint128{std::numeric_limits<uint64_t>::max()} + 2,
-      // Keeping high same
-      absl::uint128{1} << 62,
-      absl::uint128{1} << 63,
-      // Keeping low same
-      absl::uint128{1} << 64,
-      absl::uint128{1} << 65,
-      // 128 bit limits
-      std::numeric_limits<absl::uint128>::max(),
-      std::numeric_limits<absl::uint128>::max() - 1,
-      std::numeric_limits<absl::uint128>::min() + 1,
-      std::numeric_limits<absl::uint128>::min(),
-  }));
-}
-
-
-TEST(Int128Uint128, ConversionTest) {
-  absl::int128 nonnegative_signed_values[] = {
-      0,
-      1,
-      0xffeeddccbbaa9988,
-      absl::MakeInt128(0x7766554433221100, 0),
-      absl::MakeInt128(0x1234567890abcdef, 0xfedcba0987654321),
-      absl::Int128Max()};
-  for (absl::int128 value : nonnegative_signed_values) {
-    EXPECT_EQ(value, absl::int128(absl::uint128(value)));
-
-    absl::uint128 assigned_value;
-    assigned_value = value;
-    EXPECT_EQ(value, absl::int128(assigned_value));
-  }
-
-  absl::int128 negative_values[] = {
-      -1, -0x1234567890abcdef,
-      absl::MakeInt128(-0x5544332211ffeedd, 0),
-      -absl::MakeInt128(0x76543210fedcba98, 0xabcdef0123456789)};
-  for (absl::int128 value : negative_values) {
-    EXPECT_EQ(absl::uint128(-value), -absl::uint128(value));
-
-    absl::uint128 assigned_value;
-    assigned_value = value;
-    EXPECT_EQ(absl::uint128(-value), -assigned_value);
-  }
-}
-
-template <typename T>
-class Int128IntegerTraitsTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE(Int128IntegerTraitsTest, IntegerTypes);
-
-TYPED_TEST(Int128IntegerTraitsTest, ConstructAssignTest) {
-  static_assert(std::is_constructible<absl::int128, TypeParam>::value,
-                "absl::int128 must be constructible from TypeParam");
-  static_assert(std::is_assignable<absl::int128&, TypeParam>::value,
-                "absl::int128 must be assignable from TypeParam");
-  static_assert(!std::is_assignable<TypeParam&, absl::int128>::value,
-                "TypeParam must not be assignable from absl::int128");
-}
-
-template <typename T>
-class Int128FloatTraitsTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE(Int128FloatTraitsTest, FloatingPointTypes);
-
-TYPED_TEST(Int128FloatTraitsTest, ConstructAssignTest) {
-  static_assert(std::is_constructible<absl::int128, TypeParam>::value,
-                "absl::int128 must be constructible from TypeParam");
-  static_assert(!std::is_assignable<absl::int128&, TypeParam>::value,
-                "absl::int128 must not be assignable from TypeParam");
-  static_assert(!std::is_assignable<TypeParam&, absl::int128>::value,
-                "TypeParam must not be assignable from absl::int128");
-}
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-// These type traits done separately as TYPED_TEST requires typeinfo, and not
-// all platforms have this for __int128 even though they define the type.
-TEST(Int128, IntrinsicTypeTraitsTest) {
-  static_assert(std::is_constructible<absl::int128, __int128>::value,
-                "absl::int128 must be constructible from __int128");
-  static_assert(std::is_assignable<absl::int128&, __int128>::value,
-                "absl::int128 must be assignable from __int128");
-  static_assert(!std::is_assignable<__int128&, absl::int128>::value,
-                "__int128 must not be assignable from absl::int128");
-
-  static_assert(std::is_constructible<absl::int128, unsigned __int128>::value,
-                "absl::int128 must be constructible from unsigned __int128");
-  static_assert(!std::is_assignable<absl::int128&, unsigned __int128>::value,
-                "absl::int128 must be assignable from unsigned __int128");
-  static_assert(!std::is_assignable<unsigned __int128&, absl::int128>::value,
-                "unsigned __int128 must not be assignable from absl::int128");
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-TEST(Int128, TrivialTraitsTest) {
-  static_assert(absl::is_trivially_default_constructible<absl::int128>::value,
-                "");
-  static_assert(absl::is_trivially_copy_constructible<absl::int128>::value, "");
-  static_assert(absl::is_trivially_copy_assignable<absl::int128>::value, "");
-  static_assert(std::is_trivially_destructible<absl::int128>::value, "");
-}
-
-TEST(Int128, BoolConversionTest) {
-  EXPECT_FALSE(absl::int128(0));
-  for (int i = 0; i < 64; ++i) {
-    EXPECT_TRUE(absl::MakeInt128(0, uint64_t{1} << i));
-  }
-  for (int i = 0; i < 63; ++i) {
-    EXPECT_TRUE(absl::MakeInt128(int64_t{1} << i, 0));
-  }
-  EXPECT_TRUE(absl::Int128Min());
-
-  EXPECT_EQ(absl::int128(1), absl::int128(true));
-  EXPECT_EQ(absl::int128(0), absl::int128(false));
-}
-
-template <typename T>
-class Int128IntegerConversionTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE(Int128IntegerConversionTest, IntegerTypes);
-
-TYPED_TEST(Int128IntegerConversionTest, RoundTripTest) {
-  EXPECT_EQ(TypeParam{0}, static_cast<TypeParam>(absl::int128(0)));
-  EXPECT_EQ(std::numeric_limits<TypeParam>::min(),
-            static_cast<TypeParam>(
-                absl::int128(std::numeric_limits<TypeParam>::min())));
-  EXPECT_EQ(std::numeric_limits<TypeParam>::max(),
-            static_cast<TypeParam>(
-                absl::int128(std::numeric_limits<TypeParam>::max())));
-}
-
-template <typename T>
-class Int128FloatConversionTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE(Int128FloatConversionTest, FloatingPointTypes);
-
-TYPED_TEST(Int128FloatConversionTest, ConstructAndCastTest) {
-  // Conversions where the floating point values should be exactly the same.
-  // 0x9f5b is a randomly chosen small value.
-  for (int i = 0; i < 110; ++i) {  // 110 = 126 - #bits in 0x9f5b
-    SCOPED_TRACE(::testing::Message() << "i = " << i);
-
-    TypeParam float_value = std::ldexp(static_cast<TypeParam>(0x9f5b), i);
-    absl::int128 int_value = absl::int128(0x9f5b) << i;
-
-    EXPECT_EQ(float_value, static_cast<TypeParam>(int_value));
-    EXPECT_EQ(-float_value, static_cast<TypeParam>(-int_value));
-    EXPECT_EQ(int_value, absl::int128(float_value));
-    EXPECT_EQ(-int_value, absl::int128(-float_value));
-  }
-
-  // Round trip conversions with a small sample of randomly generated uint64_t
-  // values (less than int64_t max so that value * 2^64 fits into int128).
-  uint64_t values[] = {0x6d4492c24fb86199, 0x26ead65e4cb359b5,
-                       0x2c43407433ba3fd1, 0x3b574ec668df6b55,
-                       0x1c750e55a29f4f0f};
-  for (uint64_t value : values) {
-    for (int i = 0; i <= 64; ++i) {
-      SCOPED_TRACE(::testing::Message()
-                   << "value = " << value << "; i = " << i);
-
-      TypeParam fvalue = std::ldexp(static_cast<TypeParam>(value), i);
-      EXPECT_DOUBLE_EQ(fvalue, static_cast<TypeParam>(absl::int128(fvalue)));
-      EXPECT_DOUBLE_EQ(-fvalue, static_cast<TypeParam>(-absl::int128(fvalue)));
-      EXPECT_DOUBLE_EQ(-fvalue, static_cast<TypeParam>(absl::int128(-fvalue)));
-      EXPECT_DOUBLE_EQ(fvalue, static_cast<TypeParam>(-absl::int128(-fvalue)));
-    }
-  }
-
-  // Round trip conversions with a small sample of random large positive values.
-  absl::int128 large_values[] = {
-      absl::MakeInt128(0x5b0640d96c7b3d9f, 0xb7a7189e51d18622),
-      absl::MakeInt128(0x34bed042c6f65270, 0x73b236570669a089),
-      absl::MakeInt128(0x43deba9e6da12724, 0xf7f0f83da686797d),
-      absl::MakeInt128(0x71e8d383be4e5589, 0x75c3f96fb00752b6)};
-  for (absl::int128 value : large_values) {
-    // Make value have as many significant bits as can be represented by
-    // the mantissa, also making sure the highest and lowest bit in the range
-    // are set.
-    value >>= (127 - std::numeric_limits<TypeParam>::digits);
-    value |= absl::int128(1) << (std::numeric_limits<TypeParam>::digits - 1);
-    value |= 1;
-    for (int i = 0; i < 127 - std::numeric_limits<TypeParam>::digits; ++i) {
-      absl::int128 int_value = value << i;
-      EXPECT_EQ(int_value,
-                static_cast<absl::int128>(static_cast<TypeParam>(int_value)));
-      EXPECT_EQ(-int_value,
-                static_cast<absl::int128>(static_cast<TypeParam>(-int_value)));
-    }
-  }
-
-  // Small sample of checks that rounding is toward zero
-  EXPECT_EQ(0, absl::int128(TypeParam(0.1)));
-  EXPECT_EQ(17, absl::int128(TypeParam(17.8)));
-  EXPECT_EQ(0, absl::int128(TypeParam(-0.8)));
-  EXPECT_EQ(-53, absl::int128(TypeParam(-53.1)));
-  EXPECT_EQ(0, absl::int128(TypeParam(0.5)));
-  EXPECT_EQ(0, absl::int128(TypeParam(-0.5)));
-  TypeParam just_lt_one = std::nexttoward(TypeParam(1), TypeParam(0));
-  EXPECT_EQ(0, absl::int128(just_lt_one));
-  TypeParam just_gt_minus_one = std::nexttoward(TypeParam(-1), TypeParam(0));
-  EXPECT_EQ(0, absl::int128(just_gt_minus_one));
-
-  // Check limits
-  EXPECT_DOUBLE_EQ(std::ldexp(static_cast<TypeParam>(1), 127),
-                   static_cast<TypeParam>(absl::Int128Max()));
-  EXPECT_DOUBLE_EQ(-std::ldexp(static_cast<TypeParam>(1), 127),
-                   static_cast<TypeParam>(absl::Int128Min()));
-}
-
-TEST(Int128, FactoryTest) {
-  EXPECT_EQ(absl::int128(-1), absl::MakeInt128(-1, -1));
-  EXPECT_EQ(absl::int128(-31), absl::MakeInt128(-1, -31));
-  EXPECT_EQ(absl::int128(std::numeric_limits<int64_t>::min()),
-            absl::MakeInt128(-1, std::numeric_limits<int64_t>::min()));
-  EXPECT_EQ(absl::int128(0), absl::MakeInt128(0, 0));
-  EXPECT_EQ(absl::int128(1), absl::MakeInt128(0, 1));
-  EXPECT_EQ(absl::int128(std::numeric_limits<int64_t>::max()),
-            absl::MakeInt128(0, std::numeric_limits<int64_t>::max()));
-}
-
-TEST(Int128, HighLowTest) {
-  struct HighLowPair {
-    int64_t high;
-    uint64_t low;
-  };
-  HighLowPair values[]{{0, 0}, {0, 1}, {1, 0}, {123, 456}, {-654, 321}};
-  for (const HighLowPair& pair : values) {
-    absl::int128 value = absl::MakeInt128(pair.high, pair.low);
-    EXPECT_EQ(pair.low, absl::Int128Low64(value));
-    EXPECT_EQ(pair.high, absl::Int128High64(value));
-  }
-}
-
-TEST(Int128, LimitsTest) {
-  EXPECT_EQ(absl::MakeInt128(0x7fffffffffffffff, 0xffffffffffffffff),
-            absl::Int128Max());
-  EXPECT_EQ(absl::Int128Max(), ~absl::Int128Min());
-}
-
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-TEST(Int128, IntrinsicConversionTest) {
-  __int128 intrinsic =
-      (static_cast<__int128>(0x3a5b76c209de76f6) << 64) + 0x1f25e1d63a2b46c5;
-  absl::int128 custom =
-      absl::MakeInt128(0x3a5b76c209de76f6, 0x1f25e1d63a2b46c5);
-
-  EXPECT_EQ(custom, absl::int128(intrinsic));
-  EXPECT_EQ(intrinsic, static_cast<__int128>(custom));
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-TEST(Int128, ConstexprTest) {
-  constexpr absl::int128 zero = absl::int128();
-  constexpr absl::int128 one = 1;
-  constexpr absl::int128 minus_two = -2;
-  constexpr absl::int128 min = absl::Int128Min();
-  constexpr absl::int128 max = absl::Int128Max();
-  EXPECT_EQ(zero, absl::int128(0));
-  EXPECT_EQ(one, absl::int128(1));
-  EXPECT_EQ(minus_two, absl::MakeInt128(-1, -2));
-  EXPECT_GT(max, one);
-  EXPECT_LT(min, minus_two);
-}
-
-TEST(Int128, ComparisonTest) {
-  struct TestCase {
-    absl::int128 smaller;
-    absl::int128 larger;
-  };
-  TestCase cases[] = {
-      {absl::int128(0), absl::int128(123)},
-      {absl::MakeInt128(-12, 34), absl::MakeInt128(12, 34)},
-      {absl::MakeInt128(1, 1000), absl::MakeInt128(1000, 1)},
-      {absl::MakeInt128(-1000, 1000), absl::MakeInt128(-1, 1)},
-  };
-  for (const TestCase& pair : cases) {
-    SCOPED_TRACE(::testing::Message() << "pair.smaller = " << pair.smaller
-                                      << "; pair.larger = " << pair.larger);
-
-    EXPECT_TRUE(pair.smaller == pair.smaller);  // NOLINT(readability/check)
-    EXPECT_TRUE(pair.larger == pair.larger);    // NOLINT(readability/check)
-    EXPECT_FALSE(pair.smaller == pair.larger);  // NOLINT(readability/check)
-
-    EXPECT_TRUE(pair.smaller != pair.larger);    // NOLINT(readability/check)
-    EXPECT_FALSE(pair.smaller != pair.smaller);  // NOLINT(readability/check)
-    EXPECT_FALSE(pair.larger != pair.larger);    // NOLINT(readability/check)
-
-    EXPECT_TRUE(pair.smaller < pair.larger);   // NOLINT(readability/check)
-    EXPECT_FALSE(pair.larger < pair.smaller);  // NOLINT(readability/check)
-
-    EXPECT_TRUE(pair.larger > pair.smaller);   // NOLINT(readability/check)
-    EXPECT_FALSE(pair.smaller > pair.larger);  // NOLINT(readability/check)
-
-    EXPECT_TRUE(pair.smaller <= pair.larger);   // NOLINT(readability/check)
-    EXPECT_FALSE(pair.larger <= pair.smaller);  // NOLINT(readability/check)
-    EXPECT_TRUE(pair.smaller <= pair.smaller);  // NOLINT(readability/check)
-    EXPECT_TRUE(pair.larger <= pair.larger);    // NOLINT(readability/check)
-
-    EXPECT_TRUE(pair.larger >= pair.smaller);   // NOLINT(readability/check)
-    EXPECT_FALSE(pair.smaller >= pair.larger);  // NOLINT(readability/check)
-    EXPECT_TRUE(pair.smaller >= pair.smaller);  // NOLINT(readability/check)
-    EXPECT_TRUE(pair.larger >= pair.larger);    // NOLINT(readability/check)
-  }
-}
-
-TEST(Int128, UnaryNegationTest) {
-  int64_t values64[] = {0, 1, 12345, 0x4000000000000000,
-                        std::numeric_limits<int64_t>::max()};
-  for (int64_t value : values64) {
-    SCOPED_TRACE(::testing::Message() << "value = " << value);
-
-    EXPECT_EQ(absl::int128(-value), -absl::int128(value));
-    EXPECT_EQ(absl::int128(value), -absl::int128(-value));
-    EXPECT_EQ(absl::MakeInt128(-value, 0), -absl::MakeInt128(value, 0));
-    EXPECT_EQ(absl::MakeInt128(value, 0), -absl::MakeInt128(-value, 0));
-  }
-}
-
-TEST(Int128, LogicalNotTest) {
-  EXPECT_TRUE(!absl::int128(0));
-  for (int i = 0; i < 64; ++i) {
-    EXPECT_FALSE(!absl::MakeInt128(0, uint64_t{1} << i));
-  }
-  for (int i = 0; i < 63; ++i) {
-    EXPECT_FALSE(!absl::MakeInt128(int64_t{1} << i, 0));
-  }
-}
-
-TEST(Int128, AdditionSubtractionTest) {
-  // 64 bit pairs that will not cause overflow / underflow. These test negative
-  // carry; positive carry must be checked separately.
-  std::pair<int64_t, int64_t> cases[]{
-      {0, 0},                              // 0, 0
-      {0, 2945781290834},                  // 0, +
-      {1908357619234, 0},                  // +, 0
-      {0, -1204895918245},                 // 0, -
-      {-2957928523560, 0},                 // -, 0
-      {89023982312461, 98346012567134},    // +, +
-      {-63454234568239, -23456235230773},  // -, -
-      {98263457263502, -21428561935925},   // +, -
-      {-88235237438467, 15923659234573},   // -, +
-  };
-  for (const auto& pair : cases) {
-    SCOPED_TRACE(::testing::Message()
-                 << "pair = {" << pair.first << ", " << pair.second << '}');
-
-    EXPECT_EQ(absl::int128(pair.first + pair.second),
-              absl::int128(pair.first) + absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.second + pair.first),
-              absl::int128(pair.second) += absl::int128(pair.first));
-
-    EXPECT_EQ(absl::int128(pair.first - pair.second),
-              absl::int128(pair.first) - absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.second - pair.first),
-              absl::int128(pair.second) -= absl::int128(pair.first));
-
-    EXPECT_EQ(
-        absl::MakeInt128(pair.second + pair.first, 0),
-        absl::MakeInt128(pair.second, 0) + absl::MakeInt128(pair.first, 0));
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first + pair.second, 0),
-        absl::MakeInt128(pair.first, 0) += absl::MakeInt128(pair.second, 0));
-
-    EXPECT_EQ(
-        absl::MakeInt128(pair.second - pair.first, 0),
-        absl::MakeInt128(pair.second, 0) - absl::MakeInt128(pair.first, 0));
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first - pair.second, 0),
-        absl::MakeInt128(pair.first, 0) -= absl::MakeInt128(pair.second, 0));
-  }
-
-  // check positive carry
-  EXPECT_EQ(absl::MakeInt128(31, 0),
-            absl::MakeInt128(20, 1) +
-                absl::MakeInt128(10, std::numeric_limits<uint64_t>::max()));
-}
-
-TEST(Int128, IncrementDecrementTest) {
-  absl::int128 value = 0;
-  EXPECT_EQ(0, value++);
-  EXPECT_EQ(1, value);
-  EXPECT_EQ(1, value--);
-  EXPECT_EQ(0, value);
-  EXPECT_EQ(-1, --value);
-  EXPECT_EQ(-1, value);
-  EXPECT_EQ(0, ++value);
-  EXPECT_EQ(0, value);
-}
-
-TEST(Int128, MultiplicationTest) {
-  // 1 bit x 1 bit, and negative combinations
-  for (int i = 0; i < 64; ++i) {
-    for (int j = 0; j < 127 - i; ++j) {
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      absl::int128 a = absl::int128(1) << i;
-      absl::int128 b = absl::int128(1) << j;
-      absl::int128 c = absl::int128(1) << (i + j);
-
-      EXPECT_EQ(c, a * b);
-      EXPECT_EQ(-c, -a * b);
-      EXPECT_EQ(-c, a * -b);
-      EXPECT_EQ(c, -a * -b);
-
-      EXPECT_EQ(c, absl::int128(a) *= b);
-      EXPECT_EQ(-c, absl::int128(-a) *= b);
-      EXPECT_EQ(-c, absl::int128(a) *= -b);
-      EXPECT_EQ(c, absl::int128(-a) *= -b);
-    }
-  }
-
-  // Pairs of random values that will not overflow signed 64-bit multiplication
-  std::pair<int64_t, int64_t> small_values[] = {
-      {0x5e61, 0xf29f79ca14b4},    // +, +
-      {0x3e033b, -0x612c0ee549},   // +, -
-      {-0x052ce7e8, 0x7c728f0f},   // -, +
-      {-0x3af7054626, -0xfb1e1d},  // -, -
-  };
-  for (const std::pair<int64_t, int64_t>& pair : small_values) {
-    SCOPED_TRACE(::testing::Message()
-                 << "pair = {" << pair.first << ", " << pair.second << '}');
-
-    EXPECT_EQ(absl::int128(pair.first * pair.second),
-              absl::int128(pair.first) * absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.first * pair.second),
-              absl::int128(pair.first) *= absl::int128(pair.second));
-
-    EXPECT_EQ(absl::MakeInt128(pair.first * pair.second, 0),
-              absl::MakeInt128(pair.first, 0) * absl::int128(pair.second));
-    EXPECT_EQ(absl::MakeInt128(pair.first * pair.second, 0),
-              absl::MakeInt128(pair.first, 0) *= absl::int128(pair.second));
-  }
-
-  // Pairs of positive random values that will not overflow 64-bit
-  // multiplication and can be left shifted by 32 without overflow
-  std::pair<int64_t, int64_t> small_values2[] = {
-      {0x1bb0a110, 0x31487671},
-      {0x4792784e, 0x28add7d7},
-      {0x7b66553a, 0x11dff8ef},
-  };
-  for (const std::pair<int64_t, int64_t>& pair : small_values2) {
-    SCOPED_TRACE(::testing::Message()
-                 << "pair = {" << pair.first << ", " << pair.second << '}');
-
-    absl::int128 a = absl::int128(pair.first << 32);
-    absl::int128 b = absl::int128(pair.second << 32);
-    absl::int128 c = absl::MakeInt128(pair.first * pair.second, 0);
-
-    EXPECT_EQ(c, a * b);
-    EXPECT_EQ(-c, -a * b);
-    EXPECT_EQ(-c, a * -b);
-    EXPECT_EQ(c, -a * -b);
-
-    EXPECT_EQ(c, absl::int128(a) *= b);
-    EXPECT_EQ(-c, absl::int128(-a) *= b);
-    EXPECT_EQ(-c, absl::int128(a) *= -b);
-    EXPECT_EQ(c, absl::int128(-a) *= -b);
-  }
-
-  // check 0, 1, and -1 behavior with large values
-  absl::int128 large_values[] = {
-      {absl::MakeInt128(0xd66f061af02d0408, 0x727d2846cb475b53)},
-      {absl::MakeInt128(0x27b8d5ed6104452d, 0x03f8a33b0ee1df4f)},
-      {-absl::MakeInt128(0x621b6626b9e8d042, 0x27311ac99df00938)},
-      {-absl::MakeInt128(0x34e0656f1e95fb60, 0x4281cfd731257a47)},
-  };
-  for (absl::int128 value : large_values) {
-    EXPECT_EQ(0, 0 * value);
-    EXPECT_EQ(0, value * 0);
-    EXPECT_EQ(0, absl::int128(0) *= value);
-    EXPECT_EQ(0, value *= 0);
-
-    EXPECT_EQ(value, 1 * value);
-    EXPECT_EQ(value, value * 1);
-    EXPECT_EQ(value, absl::int128(1) *= value);
-    EXPECT_EQ(value, value *= 1);
-
-    EXPECT_EQ(-value, -1 * value);
-    EXPECT_EQ(-value, value * -1);
-    EXPECT_EQ(-value, absl::int128(-1) *= value);
-    EXPECT_EQ(-value, value *= -1);
-  }
-
-  // Manually calculated random large value cases
-  EXPECT_EQ(absl::MakeInt128(0xcd0efd3442219bb, 0xde47c05bcd9df6e1),
-            absl::MakeInt128(0x7c6448, 0x3bc4285c47a9d253) * 0x1a6037537b);
-  EXPECT_EQ(-absl::MakeInt128(0x1f8f149850b1e5e6, 0x1e50d6b52d272c3e),
-            -absl::MakeInt128(0x23, 0x2e68a513ca1b8859) * 0xe5a434cd14866e);
-  EXPECT_EQ(-absl::MakeInt128(0x55cae732029d1fce, 0xca6474b6423263e4),
-            0xa9b98a8ddf66bc * -absl::MakeInt128(0x81, 0x672e58231e2469d7));
-  EXPECT_EQ(absl::MakeInt128(0x19c8b7620b507dc4, 0xfec042b71a5f29a4),
-            -0x3e39341147 * -absl::MakeInt128(0x6a14b2, 0x5ed34cca42327b3c));
-
-  EXPECT_EQ(absl::MakeInt128(0xcd0efd3442219bb, 0xde47c05bcd9df6e1),
-            absl::MakeInt128(0x7c6448, 0x3bc4285c47a9d253) *= 0x1a6037537b);
-  EXPECT_EQ(-absl::MakeInt128(0x1f8f149850b1e5e6, 0x1e50d6b52d272c3e),
-            -absl::MakeInt128(0x23, 0x2e68a513ca1b8859) *= 0xe5a434cd14866e);
-  EXPECT_EQ(-absl::MakeInt128(0x55cae732029d1fce, 0xca6474b6423263e4),
-            absl::int128(0xa9b98a8ddf66bc) *=
-            -absl::MakeInt128(0x81, 0x672e58231e2469d7));
-  EXPECT_EQ(absl::MakeInt128(0x19c8b7620b507dc4, 0xfec042b71a5f29a4),
-            absl::int128(-0x3e39341147) *=
-            -absl::MakeInt128(0x6a14b2, 0x5ed34cca42327b3c));
-}
-
-TEST(Int128, DivisionAndModuloTest) {
-  // Check against 64 bit division and modulo operators with a sample of
-  // randomly generated pairs.
-  std::pair<int64_t, int64_t> small_pairs[] = {
-      {0x15f2a64138, 0x67da05},    {0x5e56d194af43045f, 0xcf1543fb99},
-      {0x15e61ed052036a, -0xc8e6}, {0x88125a341e85, -0xd23fb77683},
-      {-0xc06e20, 0x5a},           {-0x4f100219aea3e85d, 0xdcc56cb4efe993},
-      {-0x168d629105, -0xa7},      {-0x7b44e92f03ab2375, -0x6516},
-  };
-  for (const std::pair<int64_t, int64_t>& pair : small_pairs) {
-    SCOPED_TRACE(::testing::Message()
-                 << "pair = {" << pair.first << ", " << pair.second << '}');
-
-    absl::int128 dividend = pair.first;
-    absl::int128 divisor = pair.second;
-    int64_t quotient = pair.first / pair.second;
-    int64_t remainder = pair.first % pair.second;
-
-    EXPECT_EQ(quotient, dividend / divisor);
-    EXPECT_EQ(quotient, absl::int128(dividend) /= divisor);
-    EXPECT_EQ(remainder, dividend % divisor);
-    EXPECT_EQ(remainder, absl::int128(dividend) %= divisor);
-  }
-
-  // Test behavior with 0, 1, and -1 with a sample of randomly generated large
-  // values.
-  absl::int128 values[] = {
-      absl::MakeInt128(0x63d26ee688a962b2, 0x9e1411abda5c1d70),
-      absl::MakeInt128(0x152f385159d6f986, 0xbf8d48ef63da395d),
-      -absl::MakeInt128(0x3098d7567030038c, 0x14e7a8a098dc2164),
-      -absl::MakeInt128(0x49a037aca35c809f, 0xa6a87525480ef330),
-  };
-  for (absl::int128 value : values) {
-    SCOPED_TRACE(::testing::Message() << "value = " << value);
-
-    EXPECT_EQ(0, 0 / value);
-    EXPECT_EQ(0, absl::int128(0) /= value);
-    EXPECT_EQ(0, 0 % value);
-    EXPECT_EQ(0, absl::int128(0) %= value);
-
-    EXPECT_EQ(value, value / 1);
-    EXPECT_EQ(value, absl::int128(value) /= 1);
-    EXPECT_EQ(0, value % 1);
-    EXPECT_EQ(0, absl::int128(value) %= 1);
-
-    EXPECT_EQ(-value, value / -1);
-    EXPECT_EQ(-value, absl::int128(value) /= -1);
-    EXPECT_EQ(0, value % -1);
-    EXPECT_EQ(0, absl::int128(value) %= -1);
-  }
-
-  // Min and max values
-  EXPECT_EQ(0, absl::Int128Max() / absl::Int128Min());
-  EXPECT_EQ(absl::Int128Max(), absl::Int128Max() % absl::Int128Min());
-  EXPECT_EQ(-1, absl::Int128Min() / absl::Int128Max());
-  EXPECT_EQ(-1, absl::Int128Min() % absl::Int128Max());
-
-  // Power of two division and modulo of random large dividends
-  absl::int128 positive_values[] = {
-      absl::MakeInt128(0x21e1a1cc69574620, 0xe7ac447fab2fc869),
-      absl::MakeInt128(0x32c2ff3ab89e66e8, 0x03379a613fd1ce74),
-      absl::MakeInt128(0x6f32ca786184dcaf, 0x046f9c9ecb3a9ce1),
-      absl::MakeInt128(0x1aeb469dd990e0ee, 0xda2740f243cd37eb),
-  };
-  for (absl::int128 value : positive_values) {
-    for (int i = 0; i < 127; ++i) {
-      SCOPED_TRACE(::testing::Message()
-                   << "value = " << value << "; i = " << i);
-      absl::int128 power_of_two = absl::int128(1) << i;
-
-      EXPECT_EQ(value >> i, value / power_of_two);
-      EXPECT_EQ(value >> i, absl::int128(value) /= power_of_two);
-      EXPECT_EQ(value & (power_of_two - 1), value % power_of_two);
-      EXPECT_EQ(value & (power_of_two - 1),
-                absl::int128(value) %= power_of_two);
-    }
-  }
-
-  // Manually calculated cases with random large dividends
-  struct DivisionModCase {
-    absl::int128 dividend;
-    absl::int128 divisor;
-    absl::int128 quotient;
-    absl::int128 remainder;
-  };
-  DivisionModCase manual_cases[] = {
-      {absl::MakeInt128(0x6ada48d489007966, 0x3c9c5c98150d5d69),
-       absl::MakeInt128(0x8bc308fb, 0x8cb9cc9a3b803344), 0xc3b87e08,
-       absl::MakeInt128(0x1b7db5e1, 0xd9eca34b7af04b49)},
-      {absl::MakeInt128(0xd6946511b5b, 0x4886c5c96546bf5f),
-       -absl::MakeInt128(0x263b, 0xfd516279efcfe2dc), -0x59cbabf0,
-       absl::MakeInt128(0x622, 0xf462909155651d1f)},
-      {-absl::MakeInt128(0x33db734f9e8d1399, 0x8447ac92482bca4d), 0x37495078240,
-       -absl::MakeInt128(0xf01f1, 0xbc0368bf9a77eae8), -0x21a508f404d},
-      {-absl::MakeInt128(0x13f837b409a07e7d, 0x7fc8e248a7d73560), -0x1b9f,
-       absl::MakeInt128(0xb9157556d724, 0xb14f635714d7563e), -0x1ade},
-  };
-  for (const DivisionModCase test_case : manual_cases) {
-    EXPECT_EQ(test_case.quotient, test_case.dividend / test_case.divisor);
-    EXPECT_EQ(test_case.quotient,
-              absl::int128(test_case.dividend) /= test_case.divisor);
-    EXPECT_EQ(test_case.remainder, test_case.dividend % test_case.divisor);
-    EXPECT_EQ(test_case.remainder,
-              absl::int128(test_case.dividend) %= test_case.divisor);
-  }
-}
-
-TEST(Int128, BitwiseLogicTest) {
-  EXPECT_EQ(absl::int128(-1), ~absl::int128(0));
-
-  absl::int128 values[]{
-      0, -1, 0xde400bee05c3ff6b, absl::MakeInt128(0x7f32178dd81d634a, 0),
-      absl::MakeInt128(0xaf539057055613a9, 0x7d104d7d946c2e4d)};
-  for (absl::int128 value : values) {
-    EXPECT_EQ(value, ~~value);
-
-    EXPECT_EQ(value, value | value);
-    EXPECT_EQ(value, value & value);
-    EXPECT_EQ(0, value ^ value);
-
-    EXPECT_EQ(value, absl::int128(value) |= value);
-    EXPECT_EQ(value, absl::int128(value) &= value);
-    EXPECT_EQ(0, absl::int128(value) ^= value);
-
-    EXPECT_EQ(value, value | 0);
-    EXPECT_EQ(0, value & 0);
-    EXPECT_EQ(value, value ^ 0);
-
-    EXPECT_EQ(absl::int128(-1), value | absl::int128(-1));
-    EXPECT_EQ(value, value & absl::int128(-1));
-    EXPECT_EQ(~value, value ^ absl::int128(-1));
-  }
-
-  // small sample of randomly generated int64_t's
-  std::pair<int64_t, int64_t> pairs64[]{
-      {0x7f86797f5e991af4, 0x1ee30494fb007c97},
-      {0x0b278282bacf01af, 0x58780e0a57a49e86},
-      {0x059f266ccb93a666, 0x3d5b731bae9286f5},
-      {0x63c0c4820f12108c, 0x58166713c12e1c3a},
-      {0x381488bb2ed2a66e, 0x2220a3eb76a3698c},
-      {0x2a0a0dfb81e06f21, 0x4b60585927f5523c},
-      {0x555b1c3a03698537, 0x25478cd19d8e53cb},
-      {0x4750f6f27d779225, 0x16397553c6ff05fc},
-  };
-  for (const std::pair<int64_t, int64_t>& pair : pairs64) {
-    SCOPED_TRACE(::testing::Message()
-                 << "pair = {" << pair.first << ", " << pair.second << '}');
-
-    EXPECT_EQ(absl::MakeInt128(~pair.first, ~pair.second),
-              ~absl::MakeInt128(pair.first, pair.second));
-
-    EXPECT_EQ(absl::int128(pair.first & pair.second),
-              absl::int128(pair.first) & absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.first | pair.second),
-              absl::int128(pair.first) | absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.first ^ pair.second),
-              absl::int128(pair.first) ^ absl::int128(pair.second));
-
-    EXPECT_EQ(absl::int128(pair.first & pair.second),
-              absl::int128(pair.first) &= absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.first | pair.second),
-              absl::int128(pair.first) |= absl::int128(pair.second));
-    EXPECT_EQ(absl::int128(pair.first ^ pair.second),
-              absl::int128(pair.first) ^= absl::int128(pair.second));
-
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first & pair.second, 0),
-        absl::MakeInt128(pair.first, 0) & absl::MakeInt128(pair.second, 0));
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first | pair.second, 0),
-        absl::MakeInt128(pair.first, 0) | absl::MakeInt128(pair.second, 0));
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first ^ pair.second, 0),
-        absl::MakeInt128(pair.first, 0) ^ absl::MakeInt128(pair.second, 0));
-
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first & pair.second, 0),
-        absl::MakeInt128(pair.first, 0) &= absl::MakeInt128(pair.second, 0));
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first | pair.second, 0),
-        absl::MakeInt128(pair.first, 0) |= absl::MakeInt128(pair.second, 0));
-    EXPECT_EQ(
-        absl::MakeInt128(pair.first ^ pair.second, 0),
-        absl::MakeInt128(pair.first, 0) ^= absl::MakeInt128(pair.second, 0));
-  }
-}
-
-TEST(Int128, BitwiseShiftTest) {
-  for (int i = 0; i < 64; ++i) {
-    for (int j = 0; j <= i; ++j) {
-      // Left shift from j-th bit to i-th bit.
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      EXPECT_EQ(uint64_t{1} << i, absl::int128(uint64_t{1} << j) << (i - j));
-      EXPECT_EQ(uint64_t{1} << i, absl::int128(uint64_t{1} << j) <<= (i - j));
-    }
-  }
-  for (int i = 0; i < 63; ++i) {
-    for (int j = 0; j < 64; ++j) {
-      // Left shift from j-th bit to (i + 64)-th bit.
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      EXPECT_EQ(absl::MakeInt128(uint64_t{1} << i, 0),
-                absl::int128(uint64_t{1} << j) << (i + 64 - j));
-      EXPECT_EQ(absl::MakeInt128(uint64_t{1} << i, 0),
-                absl::int128(uint64_t{1} << j) <<= (i + 64 - j));
-    }
-    for (int j = 0; j <= i; ++j) {
-      // Left shift from (j + 64)-th bit to (i + 64)-th bit.
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      EXPECT_EQ(absl::MakeInt128(uint64_t{1} << i, 0),
-                absl::MakeInt128(uint64_t{1} << j, 0) << (i - j));
-      EXPECT_EQ(absl::MakeInt128(uint64_t{1} << i, 0),
-                absl::MakeInt128(uint64_t{1} << j, 0) <<= (i - j));
-    }
-  }
-
-  for (int i = 0; i < 64; ++i) {
-    for (int j = i; j < 64; ++j) {
-      // Right shift from j-th bit to i-th bit.
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      EXPECT_EQ(uint64_t{1} << i, absl::int128(uint64_t{1} << j) >> (j - i));
-      EXPECT_EQ(uint64_t{1} << i, absl::int128(uint64_t{1} << j) >>= (j - i));
-    }
-    for (int j = 0; j < 63; ++j) {
-      // Right shift from (j + 64)-th bit to i-th bit.
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      EXPECT_EQ(uint64_t{1} << i,
-                absl::MakeInt128(uint64_t{1} << j, 0) >> (j + 64 - i));
-      EXPECT_EQ(uint64_t{1} << i,
-                absl::MakeInt128(uint64_t{1} << j, 0) >>= (j + 64 - i));
-    }
-  }
-  for (int i = 0; i < 63; ++i) {
-    for (int j = i; j < 63; ++j) {
-      // Right shift from (j + 64)-th bit to (i + 64)-th bit.
-      SCOPED_TRACE(::testing::Message() << "i = " << i << "; j = " << j);
-      EXPECT_EQ(absl::MakeInt128(uint64_t{1} << i, 0),
-                absl::MakeInt128(uint64_t{1} << j, 0) >> (j - i));
-      EXPECT_EQ(absl::MakeInt128(uint64_t{1} << i, 0),
-                absl::MakeInt128(uint64_t{1} << j, 0) >>= (j - i));
-    }
-  }
-}
-
-TEST(Int128, NumericLimitsTest) {
-  static_assert(std::numeric_limits<absl::int128>::is_specialized, "");
-  static_assert(std::numeric_limits<absl::int128>::is_signed, "");
-  static_assert(std::numeric_limits<absl::int128>::is_integer, "");
-  EXPECT_EQ(static_cast<int>(127 * std::log10(2)),
-            std::numeric_limits<absl::int128>::digits10);
-  EXPECT_EQ(absl::Int128Min(), std::numeric_limits<absl::int128>::min());
-  EXPECT_EQ(absl::Int128Min(), std::numeric_limits<absl::int128>::lowest());
-  EXPECT_EQ(absl::Int128Max(), std::numeric_limits<absl::int128>::max());
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/numeric/internal/bits.h b/third_party/abseil/absl/numeric/internal/bits.h
deleted file mode 100644
index af45700..0000000
--- a/third_party/abseil/absl/numeric/internal/bits.h
+++ /dev/null
@@ -1,349 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_NUMERIC_INTERNAL_BITS_H_
-#define ABSL_NUMERIC_INTERNAL_BITS_H_
-
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-// Clang on Windows has __builtin_clzll; otherwise we need to use the
-// windows intrinsic functions.
-#if defined(_MSC_VER) && !defined(__clang__)
-#include <intrin.h>
-#endif
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-
-#if ABSL_HAVE_BUILTIN(__builtin_popcountl) && \
-    ABSL_HAVE_BUILTIN(__builtin_popcountll)
-#define ABSL_INTERNAL_CONSTEXPR_POPCOUNT constexpr
-#define ABSL_INTERNAL_HAS_CONSTEXPR_POPCOUNT 1
-#else
-#define ABSL_INTERNAL_CONSTEXPR_POPCOUNT
-#define ABSL_INTERNAL_HAS_CONSTEXPR_POPCOUNT 0
-#endif
-
-#if ABSL_HAVE_BUILTIN(__builtin_clz) && ABSL_HAVE_BUILTIN(__builtin_clzll)
-#define ABSL_INTERNAL_CONSTEXPR_CLZ constexpr
-#define ABSL_INTERNAL_HAS_CONSTEXPR_CLZ 1
-#else
-#define ABSL_INTERNAL_CONSTEXPR_CLZ
-#define ABSL_INTERNAL_HAS_CONSTEXPR_CLZ 0
-#endif
-
-#if ABSL_HAVE_BUILTIN(__builtin_ctz) && ABSL_HAVE_BUILTIN(__builtin_ctzll)
-#define ABSL_INTERNAL_CONSTEXPR_CTZ constexpr
-#define ABSL_INTERNAL_HAS_CONSTEXPR_CTZ 1
-#else
-#define ABSL_INTERNAL_CONSTEXPR_CTZ
-#define ABSL_INTERNAL_HAS_CONSTEXPR_CTZ 0
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace numeric_internal {
-
-constexpr bool IsPowerOf2(unsigned int x) noexcept {
-  return x != 0 && (x & (x - 1)) == 0;
-}
-
-template <class T>
-ABSL_MUST_USE_RESULT ABSL_ATTRIBUTE_ALWAYS_INLINE constexpr T RotateRight(
-    T x, int s) noexcept {
-  static_assert(std::is_unsigned<T>::value, "T must be unsigned");
-  static_assert(IsPowerOf2(std::numeric_limits<T>::digits),
-                "T must have a power-of-2 size");
-
-  return static_cast<T>(x >> (s & (std::numeric_limits<T>::digits - 1))) |
-         static_cast<T>(x << ((-s) & (std::numeric_limits<T>::digits - 1)));
-}
-
-template <class T>
-ABSL_MUST_USE_RESULT ABSL_ATTRIBUTE_ALWAYS_INLINE constexpr T RotateLeft(
-    T x, int s) noexcept {
-  static_assert(std::is_unsigned<T>::value, "T must be unsigned");
-  static_assert(IsPowerOf2(std::numeric_limits<T>::digits),
-                "T must have a power-of-2 size");
-
-  return static_cast<T>(x << (s & (std::numeric_limits<T>::digits - 1))) |
-         static_cast<T>(x >> ((-s) & (std::numeric_limits<T>::digits - 1)));
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_POPCOUNT inline int
-Popcount32(uint32_t x) noexcept {
-#if ABSL_HAVE_BUILTIN(__builtin_popcount)
-  static_assert(sizeof(unsigned int) == sizeof(x),
-                "__builtin_popcount does not take 32-bit arg");
-  return __builtin_popcount(x);
-#else
-  x -= ((x >> 1) & 0x55555555);
-  x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
-  return static_cast<int>((((x + (x >> 4)) & 0xF0F0F0F) * 0x1010101) >> 24);
-#endif
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_POPCOUNT inline int
-Popcount64(uint64_t x) noexcept {
-#if ABSL_HAVE_BUILTIN(__builtin_popcountll)
-  static_assert(sizeof(unsigned long long) == sizeof(x),  // NOLINT(runtime/int)
-                "__builtin_popcount does not take 64-bit arg");
-  return __builtin_popcountll(x);
-#else
-  x -= (x >> 1) & 0x5555555555555555ULL;
-  x = ((x >> 2) & 0x3333333333333333ULL) + (x & 0x3333333333333333ULL);
-  return static_cast<int>(
-      (((x + (x >> 4)) & 0xF0F0F0F0F0F0F0FULL) * 0x101010101010101ULL) >> 56);
-#endif
-}
-
-template <class T>
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_POPCOUNT inline int
-Popcount(T x) noexcept {
-  static_assert(std::is_unsigned<T>::value, "T must be unsigned");
-  static_assert(IsPowerOf2(std::numeric_limits<T>::digits),
-                "T must have a power-of-2 size");
-  static_assert(sizeof(x) <= sizeof(uint64_t), "T is too large");
-  return sizeof(x) <= sizeof(uint32_t) ? Popcount32(x) : Popcount64(x);
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline int
-CountLeadingZeroes32(uint32_t x) {
-#if ABSL_HAVE_BUILTIN(__builtin_clz)
-  // Use __builtin_clz, which uses the following instructions:
-  //  x86: bsr, lzcnt
-  //  ARM64: clz
-  //  PPC: cntlzd
-
-  static_assert(sizeof(unsigned int) == sizeof(x),
-                "__builtin_clz does not take 32-bit arg");
-  // Handle 0 as a special case because __builtin_clz(0) is undefined.
-  return x == 0 ? 32 : __builtin_clz(x);
-#elif defined(_MSC_VER) && !defined(__clang__)
-  unsigned long result = 0;  // NOLINT(runtime/int)
-  if (_BitScanReverse(&result, x)) {
-    return 31 - result;
-  }
-  return 32;
-#else
-  int zeroes = 28;
-  if (x >> 16) {
-    zeroes -= 16;
-    x >>= 16;
-  }
-  if (x >> 8) {
-    zeroes -= 8;
-    x >>= 8;
-  }
-  if (x >> 4) {
-    zeroes -= 4;
-    x >>= 4;
-  }
-  return "\4\3\2\2\1\1\1\1\0\0\0\0\0\0\0"[x] + zeroes;
-#endif
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline int
-CountLeadingZeroes16(uint16_t x) {
-#if ABSL_HAVE_BUILTIN(__builtin_clzs)
-  static_assert(sizeof(unsigned short) == sizeof(x),  // NOLINT(runtime/int)
-                "__builtin_clzs does not take 16-bit arg");
-  return x == 0 ? 16 : __builtin_clzs(x);
-#else
-  return CountLeadingZeroes32(x) - 16;
-#endif
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline int
-CountLeadingZeroes64(uint64_t x) {
-#if ABSL_HAVE_BUILTIN(__builtin_clzll)
-  // Use __builtin_clzll, which uses the following instructions:
-  //  x86: bsr, lzcnt
-  //  ARM64: clz
-  //  PPC: cntlzd
-  static_assert(sizeof(unsigned long long) == sizeof(x),  // NOLINT(runtime/int)
-                "__builtin_clzll does not take 64-bit arg");
-
-  // Handle 0 as a special case because __builtin_clzll(0) is undefined.
-  return x == 0 ? 64 : __builtin_clzll(x);
-#elif defined(_MSC_VER) && !defined(__clang__) && \
-    (defined(_M_X64) || defined(_M_ARM64))
-  // MSVC does not have __buitin_clzll. Use _BitScanReverse64.
-  unsigned long result = 0;  // NOLINT(runtime/int)
-  if (_BitScanReverse64(&result, x)) {
-    return 63 - result;
-  }
-  return 64;
-#elif defined(_MSC_VER) && !defined(__clang__)
-  // MSVC does not have __buitin_clzll. Compose two calls to _BitScanReverse
-  unsigned long result = 0;  // NOLINT(runtime/int)
-  if ((x >> 32) &&
-      _BitScanReverse(&result, static_cast<unsigned long>(x >> 32))) {
-    return 31 - result;
-  }
-  if (_BitScanReverse(&result, static_cast<unsigned long>(x))) {
-    return 63 - result;
-  }
-  return 64;
-#else
-  int zeroes = 60;
-  if (x >> 32) {
-    zeroes -= 32;
-    x >>= 32;
-  }
-  if (x >> 16) {
-    zeroes -= 16;
-    x >>= 16;
-  }
-  if (x >> 8) {
-    zeroes -= 8;
-    x >>= 8;
-  }
-  if (x >> 4) {
-    zeroes -= 4;
-    x >>= 4;
-  }
-  return "\4\3\2\2\1\1\1\1\0\0\0\0\0\0\0"[x] + zeroes;
-#endif
-}
-
-template <typename T>
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline int
-CountLeadingZeroes(T x) {
-  static_assert(std::is_unsigned<T>::value, "T must be unsigned");
-  static_assert(IsPowerOf2(std::numeric_limits<T>::digits),
-                "T must have a power-of-2 size");
-  static_assert(sizeof(T) <= sizeof(uint64_t), "T too large");
-  return sizeof(T) <= sizeof(uint16_t)
-             ? CountLeadingZeroes16(static_cast<uint16_t>(x)) -
-                   (std::numeric_limits<uint16_t>::digits -
-                    std::numeric_limits<T>::digits)
-             : (sizeof(T) <= sizeof(uint32_t)
-                    ? CountLeadingZeroes32(static_cast<uint32_t>(x)) -
-                          (std::numeric_limits<uint32_t>::digits -
-                           std::numeric_limits<T>::digits)
-                    : CountLeadingZeroes64(x));
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CTZ inline int
-CountTrailingZeroesNonzero32(uint32_t x) {
-#if ABSL_HAVE_BUILTIN(__builtin_ctz)
-  static_assert(sizeof(unsigned int) == sizeof(x),
-                "__builtin_ctz does not take 32-bit arg");
-  return __builtin_ctz(x);
-#elif defined(_MSC_VER) && !defined(__clang__)
-  unsigned long result = 0;  // NOLINT(runtime/int)
-  _BitScanForward(&result, x);
-  return result;
-#else
-  int c = 31;
-  x &= ~x + 1;
-  if (x & 0x0000FFFF) c -= 16;
-  if (x & 0x00FF00FF) c -= 8;
-  if (x & 0x0F0F0F0F) c -= 4;
-  if (x & 0x33333333) c -= 2;
-  if (x & 0x55555555) c -= 1;
-  return c;
-#endif
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CTZ inline int
-CountTrailingZeroesNonzero64(uint64_t x) {
-#if ABSL_HAVE_BUILTIN(__builtin_ctzll)
-  static_assert(sizeof(unsigned long long) == sizeof(x),  // NOLINT(runtime/int)
-                "__builtin_ctzll does not take 64-bit arg");
-  return __builtin_ctzll(x);
-#elif defined(_MSC_VER) && !defined(__clang__) && \
-    (defined(_M_X64) || defined(_M_ARM64))
-  unsigned long result = 0;  // NOLINT(runtime/int)
-  _BitScanForward64(&result, x);
-  return result;
-#elif defined(_MSC_VER) && !defined(__clang__)
-  unsigned long result = 0;  // NOLINT(runtime/int)
-  if (static_cast<uint32_t>(x) == 0) {
-    _BitScanForward(&result, static_cast<unsigned long>(x >> 32));
-    return result + 32;
-  }
-  _BitScanForward(&result, static_cast<unsigned long>(x));
-  return result;
-#else
-  int c = 63;
-  x &= ~x + 1;
-  if (x & 0x00000000FFFFFFFF) c -= 32;
-  if (x & 0x0000FFFF0000FFFF) c -= 16;
-  if (x & 0x00FF00FF00FF00FF) c -= 8;
-  if (x & 0x0F0F0F0F0F0F0F0F) c -= 4;
-  if (x & 0x3333333333333333) c -= 2;
-  if (x & 0x5555555555555555) c -= 1;
-  return c;
-#endif
-}
-
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CTZ inline int
-CountTrailingZeroesNonzero16(uint16_t x) {
-#if ABSL_HAVE_BUILTIN(__builtin_ctzs)
-  static_assert(sizeof(unsigned short) == sizeof(x),  // NOLINT(runtime/int)
-                "__builtin_ctzs does not take 16-bit arg");
-  return __builtin_ctzs(x);
-#else
-  return CountTrailingZeroesNonzero32(x);
-#endif
-}
-
-template <class T>
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CTZ inline int
-CountTrailingZeroes(T x) noexcept {
-  static_assert(std::is_unsigned<T>::value, "T must be unsigned");
-  static_assert(IsPowerOf2(std::numeric_limits<T>::digits),
-                "T must have a power-of-2 size");
-  static_assert(sizeof(T) <= sizeof(uint64_t), "T too large");
-  return x == 0 ? std::numeric_limits<T>::digits
-                : (sizeof(T) <= sizeof(uint16_t)
-                       ? CountTrailingZeroesNonzero16(static_cast<uint16_t>(x))
-                       : (sizeof(T) <= sizeof(uint32_t)
-                              ? CountTrailingZeroesNonzero32(
-                                    static_cast<uint32_t>(x))
-                              : CountTrailingZeroesNonzero64(x)));
-}
-
-// If T is narrower than unsigned, T{1} << bit_width will be promoted.  We
-// want to force it to wraparound so that bit_ceil of an invalid value are not
-// core constant expressions.
-template <class T>
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    BitCeilPromotionHelper(T x, T promotion) {
-  return (T{1} << (x + promotion)) >> promotion;
-}
-
-template <class T>
-ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline
-    typename std::enable_if<std::is_unsigned<T>::value, T>::type
-    BitCeilNonPowerOf2(T x) {
-  // If T is narrower than unsigned, it undergoes promotion to unsigned when we
-  // shift.  We calcualte the number of bits added by the wider type.
-  return BitCeilPromotionHelper(
-      static_cast<T>(std::numeric_limits<T>::digits - CountLeadingZeroes(x)),
-      T{sizeof(T) >= sizeof(unsigned) ? 0
-                                      : std::numeric_limits<unsigned>::digits -
-                                            std::numeric_limits<T>::digits});
-}
-
-}  // namespace numeric_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_NUMERIC_INTERNAL_BITS_H_
diff --git a/third_party/abseil/absl/random/BUILD.bazel b/third_party/abseil/absl/random/BUILD.bazel
deleted file mode 100644
index d97b2c4..0000000
--- a/third_party/abseil/absl/random/BUILD.bazel
+++ /dev/null
@@ -1,510 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# ABSL random-number generation libraries.
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "random",
-    hdrs = ["random.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":seed_sequences",
-        "//absl/random/internal:nonsecure_base",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:pool_urbg",
-        "//absl/random/internal:randen_engine",
-    ],
-)
-
-cc_library(
-    name = "distributions",
-    srcs = [
-        "discrete_distribution.cc",
-        "gaussian_distribution.cc",
-    ],
-    hdrs = [
-        "bernoulli_distribution.h",
-        "beta_distribution.h",
-        "discrete_distribution.h",
-        "distributions.h",
-        "exponential_distribution.h",
-        "gaussian_distribution.h",
-        "log_uniform_int_distribution.h",
-        "poisson_distribution.h",
-        "uniform_int_distribution.h",
-        "uniform_real_distribution.h",
-        "zipf_distribution.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:base_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-        "//absl/numeric:bits",
-        "//absl/random/internal:distribution_caller",
-        "//absl/random/internal:fast_uniform_bits",
-        "//absl/random/internal:fastmath",
-        "//absl/random/internal:generate_real",
-        "//absl/random/internal:iostream_state_saver",
-        "//absl/random/internal:traits",
-        "//absl/random/internal:uniform_helper",
-        "//absl/random/internal:wide_multiply",
-        "//absl/strings",
-    ],
-)
-
-cc_library(
-    name = "seed_gen_exception",
-    srcs = ["seed_gen_exception.cc"],
-    hdrs = ["seed_gen_exception.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/base:config"],
-)
-
-cc_library(
-    name = "seed_sequences",
-    srcs = ["seed_sequences.cc"],
-    hdrs = [
-        "seed_sequences.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":seed_gen_exception",
-        "//absl/container:inlined_vector",
-        "//absl/random/internal:nonsecure_base",
-        "//absl/random/internal:pool_urbg",
-        "//absl/random/internal:salted_seed_seq",
-        "//absl/random/internal:seed_material",
-        "//absl/types:span",
-    ],
-)
-
-cc_library(
-    name = "bit_gen_ref",
-    hdrs = ["bit_gen_ref.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":random",
-        "//absl/base:core_headers",
-        "//absl/base:fast_type_id",
-        "//absl/meta:type_traits",
-        "//absl/random/internal:distribution_caller",
-        "//absl/random/internal:fast_uniform_bits",
-    ],
-)
-
-cc_library(
-    name = "mock_distributions",
-    testonly = 1,
-    hdrs = ["mock_distributions.h"],
-    deps = [
-        ":distributions",
-        ":mocking_bit_gen",
-        "//absl/meta:type_traits",
-        "//absl/random/internal:mock_overload_set",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_library(
-    name = "mocking_bit_gen",
-    testonly = 1,
-    hdrs = [
-        "mocking_bit_gen.h",
-    ],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:fast_type_id",
-        "//absl/container:flat_hash_map",
-        "//absl/meta:type_traits",
-        "//absl/random/internal:distribution_caller",
-        "//absl/strings",
-        "//absl/types:span",
-        "//absl/types:variant",
-        "//absl/utility",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "bernoulli_distribution_test",
-    size = "small",
-    timeout = "eternal",  # Android can take a very long time
-    srcs = ["bernoulli_distribution_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "beta_distribution_test",
-    size = "small",
-    timeout = "eternal",  # Android can take a very long time
-    srcs = ["beta_distribution_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    flaky = 1,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "//absl/strings:str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "distributions_test",
-    size = "small",
-    timeout = "moderate",
-    srcs = [
-        "distributions_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/random/internal:distribution_test_util",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "generators_test",
-    size = "small",
-    srcs = ["generators_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "log_uniform_int_distribution_test",
-    size = "medium",
-    srcs = [
-        "log_uniform_int_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "//absl/strings:str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "discrete_distribution_test",
-    size = "medium",
-    srcs = [
-        "discrete_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "poisson_distribution_test",
-    size = "small",
-    timeout = "eternal",  # Android can take a very long time
-    srcs = [
-        "poisson_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = [
-        # Too Slow.
-        "no_test_android_arm",
-        "no_test_loonix",
-    ],
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/container:flat_hash_map",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "//absl/strings:str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "exponential_distribution_test",
-    size = "small",
-    srcs = ["exponential_distribution_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "//absl/strings:str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "gaussian_distribution_test",
-    size = "small",
-    timeout = "eternal",  # Android can take a very long time
-    srcs = [
-        "gaussian_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "//absl/strings:str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "uniform_int_distribution_test",
-    size = "medium",
-    timeout = "long",
-    srcs = [
-        "uniform_int_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "uniform_real_distribution_test",
-    size = "medium",
-    srcs = [
-        "uniform_real_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = [
-        "no_test_android_arm",
-        "no_test_android_arm64",
-        "no_test_android_x86",
-    ],
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "zipf_distribution_test",
-    size = "medium",
-    srcs = [
-        "zipf_distribution_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distributions",
-        ":random",
-        "//absl/base:raw_logging_internal",
-        "//absl/random/internal:distribution_test_util",
-        "//absl/random/internal:pcg_engine",
-        "//absl/random/internal:sequence_urbg",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "bit_gen_ref_test",
-    size = "small",
-    srcs = ["bit_gen_ref_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bit_gen_ref",
-        ":random",
-        "//absl/base:fast_type_id",
-        "//absl/random/internal:sequence_urbg",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "mocking_bit_gen_test",
-    size = "small",
-    srcs = ["mocking_bit_gen_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bit_gen_ref",
-        ":mock_distributions",
-        ":mocking_bit_gen",
-        ":random",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "mock_distributions_test",
-    size = "small",
-    srcs = ["mock_distributions_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":mock_distributions",
-        ":mocking_bit_gen",
-        ":random",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "examples_test",
-    size = "small",
-    srcs = ["examples_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":random",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "seed_sequences_test",
-    size = "small",
-    srcs = ["seed_sequences_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":random",
-        ":seed_sequences",
-        "//absl/random/internal:nonsecure_base",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-BENCHMARK_TAGS = [
-    "benchmark",
-    "no_test_android_arm",
-    "no_test_android_arm64",
-    "no_test_android_x86",
-    "no_test_darwin_x86_64",
-    "no_test_ios_x86_64",
-    "no_test_loonix",
-    "no_test_msvc_x64",
-    "no_test_wasm",
-]
-
-# Benchmarks for various methods / test utilities
-cc_binary(
-    name = "benchmarks",
-    testonly = 1,
-    srcs = [
-        "benchmarks.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = BENCHMARK_TAGS,
-    deps = [
-        ":distributions",
-        ":random",
-        ":seed_sequences",
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-        "//absl/random/internal:fast_uniform_bits",
-        "//absl/random/internal:randen_engine",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
diff --git a/third_party/abseil/absl/random/CMakeLists.txt b/third_party/abseil/absl/random/CMakeLists.txt
deleted file mode 100644
index 7d7bec8..0000000
--- a/third_party/abseil/absl/random/CMakeLists.txt
+++ /dev/null
@@ -1,1207 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    random_random
-  HDRS
-    "random.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_internal_nonsecure_base
-    absl::random_internal_pcg_engine
-    absl::random_internal_pool_urbg
-    absl::random_internal_randen_engine
-    absl::random_seed_sequences
-)
-
-absl_cc_library(
-  NAME
-    random_bit_gen_ref
-  HDRS
-    "bit_gen_ref.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::core_headers
-    absl::random_internal_distribution_caller
-    absl::random_internal_fast_uniform_bits
-    absl::type_traits
-)
-
-absl_cc_test(
-  NAME
-    random_bit_gen_ref_test
-  SRCS
-    "bit_gen_ref_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_bit_gen_ref
-    absl::random_random
-    absl::random_internal_sequence_urbg
-    absl::fast_type_id
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_mock_helpers
-  HDRS
-    "internal/mock_helpers.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::fast_type_id
-    absl::optional
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_mock_overload_set
-  HDRS
-    "internal/mock_overload_set.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_mocking_bit_gen
-    absl::random_internal_mock_helpers
-  TESTONLY
-)
-
-absl_cc_library(
-  NAME
-    random_mocking_bit_gen
-  HDRS
-    "mock_distributions.h"
-    "mocking_bit_gen.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::flat_hash_map
-    absl::raw_logging_internal
-    absl::random_distributions
-    absl::random_internal_distribution_caller
-    absl::random_internal_mock_overload_set
-    absl::random_random
-    absl::strings
-    absl::span
-    absl::type_traits
-    absl::utility
-    absl::variant
-    gmock
-    gtest
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    random_mock_distributions_test
-  SRCS
-    "mock_distributions_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_mocking_bit_gen
-    absl::random_random
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_mocking_bit_gen_test
-  SRCS
-    "mocking_bit_gen_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_bit_gen_ref
-    absl::random_mocking_bit_gen
-    absl::random_random
-    gmock
-    gtest_main
-)
-
-absl_cc_library(
-  NAME
-    random_distributions
-  SRCS
-    "discrete_distribution.cc"
-    "gaussian_distribution.cc"
-  HDRS
-    "bernoulli_distribution.h"
-    "beta_distribution.h"
-    "discrete_distribution.h"
-    "distributions.h"
-    "exponential_distribution.h"
-    "gaussian_distribution.h"
-    "log_uniform_int_distribution.h"
-    "poisson_distribution.h"
-    "uniform_int_distribution.h"
-    "uniform_real_distribution.h"
-    "zipf_distribution.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::random_internal_generate_real
-    absl::random_internal_distribution_caller
-    absl::random_internal_fast_uniform_bits
-    absl::random_internal_fastmath
-    absl::random_internal_iostream_state_saver
-    absl::random_internal_traits
-    absl::random_internal_uniform_helper
-    absl::random_internal_wide_multiply
-    absl::strings
-    absl::type_traits
-)
-
-absl_cc_library(
-  NAME
-    random_seed_gen_exception
-  SRCS
-    "seed_gen_exception.cc"
-  HDRS
-    "seed_gen_exception.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-)
-
-absl_cc_library(
-  NAME
-    random_seed_sequences
-  SRCS
-    "seed_sequences.cc"
-  HDRS
-    "seed_sequences.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::inlined_vector
-    absl::random_internal_nonsecure_base
-    absl::random_internal_pool_urbg
-    absl::random_internal_salted_seed_seq
-    absl::random_internal_seed_material
-    absl::random_seed_gen_exception
-    absl::span
-)
-
-absl_cc_test(
-  NAME
-    random_bernoulli_distribution_test
-  SRCS
-    "bernoulli_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_random
-    absl::random_internal_sequence_urbg
-    absl::random_internal_pcg_engine
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_beta_distribution_test
-  SRCS
-    "beta_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_random
-    absl::random_internal_distribution_test_util
-    absl::random_internal_sequence_urbg
-    absl::random_internal_pcg_engine
-    absl::raw_logging_internal
-    absl::strings
-    absl::str_format
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_distributions_test
-  SRCS
-    "distributions_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_random
-    absl::random_internal_distribution_test_util
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_generators_test
-  SRCS
-    "generators_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-    absl::random_distributions
-    absl::random_random
-    absl::raw_logging_internal
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_log_uniform_int_distribution_test
-  SRCS
-    "log_uniform_int_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::raw_logging_internal
-    absl::strings
-    absl::str_format
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_discrete_distribution_test
-  SRCS
-    "discrete_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::raw_logging_internal
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_poisson_distribution_test
-  SRCS
-    "poisson_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_random
-    absl::core_headers
-    absl::flat_hash_map
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::raw_logging_internal
-    absl::strings
-    absl::str_format
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_exponential_distribution_test
-  SRCS
-    "exponential_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::core_headers
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::raw_logging_internal
-    absl::strings
-    absl::str_format
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_gaussian_distribution_test
-  SRCS
-    "gaussian_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::core_headers
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::raw_logging_internal
-    absl::strings
-    absl::str_format
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_uniform_int_distribution_test
-  SRCS
-    "uniform_int_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::raw_logging_internal
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_uniform_real_distribution_test
-  SRCS
-    "uniform_real_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_zipf_distribution_test
-  SRCS
-    "zipf_distribution_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_distributions
-    absl::random_internal_distribution_test_util
-    absl::random_internal_pcg_engine
-    absl::random_internal_sequence_urbg
-    absl::random_random
-    absl::raw_logging_internal
-    absl::strings
-    gmock
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_examples_test
-  SRCS
-    "examples_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_random
-    gtest_main
-)
-
-absl_cc_test(
-  NAME
-    random_seed_sequences_test
-  SRCS
-    "seed_sequences_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_seed_sequences
-    absl::random_internal_nonsecure_base
-    absl::random_random
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_traits
-  HDRS
-    "internal/traits.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_distribution_caller
-  HDRS
-    "internal/distribution_caller.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::utility
-    absl::fast_type_id
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_fast_uniform_bits
-  HDRS
-    "internal/fast_uniform_bits.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_seed_material
-  SRCS
-    "internal/seed_material.cc"
-  HDRS
-    "internal/seed_material.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-    $<$<BOOL:${MINGW}>:"bcrypt">
-  DEPS
-    absl::core_headers
-    absl::optional
-    absl::random_internal_fast_uniform_bits
-    absl::raw_logging_internal
-    absl::span
-    absl::strings
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_pool_urbg
-  SRCS
-    "internal/pool_urbg.cc"
-  HDRS
-    "internal/pool_urbg.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::endian
-    absl::random_internal_randen
-    absl::random_internal_seed_material
-    absl::random_internal_traits
-    absl::random_seed_gen_exception
-    absl::raw_logging_internal
-    absl::span
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_explicit_seed_seq
-  HDRS
-      "internal/random_internal_explicit_seed_seq.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-  TESTONLY
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_sequence_urbg
-  HDRS
-    "internal/sequence_urbg.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-  TESTONLY
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_salted_seed_seq
-  HDRS
-    "internal/salted_seed_seq.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::inlined_vector
-    absl::optional
-    absl::span
-    absl::random_internal_seed_material
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_iostream_state_saver
-  HDRS
-    "internal/iostream_state_saver.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::int128
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_generate_real
-  HDRS
-    "internal/generate_real.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::bits
-    absl::random_internal_fastmath
-    absl::random_internal_traits
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_wide_multiply
-  HDRS
-    "internal/wide_multiply.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::bits
-    absl::config
-    absl::int128
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_fastmath
-  HDRS
-    "internal/fastmath.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::bits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_nonsecure_base
-  HDRS
-    "internal/nonsecure_base.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::core_headers
-    absl::optional
-    absl::random_internal_pool_urbg
-    absl::random_internal_salted_seed_seq
-    absl::random_internal_seed_material
-    absl::span
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_pcg_engine
-  HDRS
-    "internal/pcg_engine.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::int128
-    absl::random_internal_fastmath
-    absl::random_internal_iostream_state_saver
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_randen_engine
-  HDRS
-    "internal/randen_engine.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_iostream_state_saver
-    absl::random_internal_randen
-    absl::raw_logging_internal
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_platform
-  HDRS
-    "internal/randen_traits.h"
-    "internal/platform.h"
-  SRCS
-    "internal/randen_round_keys.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_randen
-  SRCS
-    "internal/randen.cc"
-  HDRS
-    "internal/randen.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_platform
-    absl::random_internal_randen_hwaes
-    absl::random_internal_randen_slow
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_randen_slow
-  SRCS
-    "internal/randen_slow.cc"
-  HDRS
-    "internal/randen_slow.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_platform
-    absl::config
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_randen_hwaes
-  SRCS
-    "internal/randen_detect.cc"
-  HDRS
-    "internal/randen_detect.h"
-    "internal/randen_hwaes.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    ${ABSL_RANDOM_RANDEN_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_platform
-    absl::random_internal_randen_hwaes_impl
-    absl::config
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_randen_hwaes_impl
-  SRCS
-    "internal/randen_hwaes.cc"
-    "internal/randen_hwaes.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-    ${ABSL_RANDOM_RANDEN_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_platform
-    absl::config
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_distribution_test_util
-  SRCS
-    "internal/chi_square.cc"
-    "internal/distribution_test_util.cc"
-  HDRS
-    "internal/chi_square.h"
-    "internal/distribution_test_util.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::raw_logging_internal
-    absl::strings
-    absl::str_format
-    absl::span
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_traits_test
-  SRCS
-    "internal/traits_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_traits
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_generate_real_test
-  SRCS
-    "internal/generate_real_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::bits
-    absl::flags
-    absl::random_internal_generate_real
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_distribution_test_util_test
-  SRCS
-    "internal/distribution_test_util_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_distribution_test_util
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_fastmath_test
-  SRCS
-    "internal/fastmath_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_fastmath
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_explicit_seed_seq_test
-  SRCS
-    "internal/explicit_seed_seq_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_explicit_seed_seq
-    absl::random_seed_sequences
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_salted_seed_seq_test
-  SRCS
-    "internal/salted_seed_seq_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_salted_seed_seq
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_chi_square_test
-  SRCS
-    "internal/chi_square_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::core_headers
-    absl::random_internal_distribution_test_util
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_fast_uniform_bits_test
-  SRCS
-    "internal/fast_uniform_bits_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_fast_uniform_bits
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_nonsecure_base_test
-  SRCS
-    "internal/nonsecure_base_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_nonsecure_base
-    absl::random_random
-    absl::random_distributions
-    absl::random_seed_sequences
-    absl::strings
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_seed_material_test
-  SRCS
-    "internal/seed_material_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_seed_material
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_pool_urbg_test
-  SRCS
-    "internal/pool_urbg_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_pool_urbg
-    absl::span
-    absl::type_traits
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_pcg_engine_test
-  SRCS
-    "internal/pcg_engine_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_explicit_seed_seq
-    absl::random_internal_pcg_engine
-    absl::time
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_randen_engine_test
-  SRCS
-    "internal/randen_engine_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_explicit_seed_seq
-    absl::random_internal_randen_engine
-    absl::raw_logging_internal
-    absl::strings
-    absl::time
-    gmock
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_randen_test
-  SRCS
-    "internal/randen_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_randen
-    absl::type_traits
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_randen_slow_test
-  SRCS
-    "internal/randen_slow_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_randen_slow
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_randen_hwaes_test
-  SRCS
-    "internal/randen_hwaes_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_platform
-    absl::random_internal_randen_hwaes
-    absl::random_internal_randen_hwaes_impl
-    absl::raw_logging_internal
-    absl::str_format
-    gmock
-    gtest
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_library(
-  NAME
-    random_internal_uniform_helper
-  HDRS
-    "internal/uniform_helper.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::config
-    absl::random_internal_traits
-    absl::type_traits
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_uniform_helper_test
-  SRCS
-    "internal/uniform_helper_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_uniform_helper
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_iostream_state_saver_test
-  SRCS
-    "internal/iostream_state_saver_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_iostream_state_saver
-    gtest_main
-)
-
-# Internal-only target, do not depend on directly.
-absl_cc_test(
-  NAME
-    random_internal_wide_multiply_test
-  SRCS
-      internal/wide_multiply_test.cc
-  COPTS
-    ${ABSL_TEST_COPTS}
-  LINKOPTS
-    ${ABSL_DEFAULT_LINKOPTS}
-  DEPS
-    absl::random_internal_wide_multiply
-    absl::bits
-    absl::int128
-    gtest_main
-)
diff --git a/third_party/abseil/absl/random/benchmarks.cc b/third_party/abseil/absl/random/benchmarks.cc
deleted file mode 100644
index 87bbb98..0000000
--- a/third_party/abseil/absl/random/benchmarks.cc
+++ /dev/null
@@ -1,383 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Benchmarks for absl random distributions as well as a selection of the
-// C++ standard library random distributions.
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <initializer_list>
-#include <iterator>
-#include <limits>
-#include <random>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/bernoulli_distribution.h"
-#include "absl/random/beta_distribution.h"
-#include "absl/random/exponential_distribution.h"
-#include "absl/random/gaussian_distribution.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/randen_engine.h"
-#include "absl/random/log_uniform_int_distribution.h"
-#include "absl/random/poisson_distribution.h"
-#include "absl/random/random.h"
-#include "absl/random/uniform_int_distribution.h"
-#include "absl/random/uniform_real_distribution.h"
-#include "absl/random/zipf_distribution.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-// Seed data to avoid reading random_device() for benchmarks.
-uint32_t kSeedData[] = {
-    0x1B510052, 0x9A532915, 0xD60F573F, 0xBC9BC6E4, 0x2B60A476, 0x81E67400,
-    0x08BA6FB5, 0x571BE91F, 0xF296EC6B, 0x2A0DD915, 0xB6636521, 0xE7B9F9B6,
-    0xFF34052E, 0xC5855664, 0x53B02D5D, 0xA99F8FA1, 0x08BA4799, 0x6E85076A,
-    0x4B7A70E9, 0xB5B32944, 0xDB75092E, 0xC4192623, 0xAD6EA6B0, 0x49A7DF7D,
-    0x9CEE60B8, 0x8FEDB266, 0xECAA8C71, 0x699A18FF, 0x5664526C, 0xC2B19EE1,
-    0x193602A5, 0x75094C29, 0xA0591340, 0xE4183A3E, 0x3F54989A, 0x5B429D65,
-    0x6B8FE4D6, 0x99F73FD6, 0xA1D29C07, 0xEFE830F5, 0x4D2D38E6, 0xF0255DC1,
-    0x4CDD2086, 0x8470EB26, 0x6382E9C6, 0x021ECC5E, 0x09686B3F, 0x3EBAEFC9,
-    0x3C971814, 0x6B6A70A1, 0x687F3584, 0x52A0E286, 0x13198A2E, 0x03707344,
-};
-
-// PrecompiledSeedSeq provides kSeedData to a conforming
-// random engine to speed initialization in the benchmarks.
-class PrecompiledSeedSeq {
- public:
-  using result_type = uint32_t;
-
-  PrecompiledSeedSeq() {}
-
-  template <typename Iterator>
-  PrecompiledSeedSeq(Iterator begin, Iterator end) {}
-
-  template <typename T>
-  PrecompiledSeedSeq(std::initializer_list<T> il) {}
-
-  template <typename OutIterator>
-  void generate(OutIterator begin, OutIterator end) {
-    static size_t idx = 0;
-    for (; begin != end; begin++) {
-      *begin = kSeedData[idx++];
-      if (idx >= ABSL_ARRAYSIZE(kSeedData)) {
-        idx = 0;
-      }
-    }
-  }
-
-  size_t size() const { return ABSL_ARRAYSIZE(kSeedData); }
-
-  template <typename OutIterator>
-  void param(OutIterator out) const {
-    std::copy(std::begin(kSeedData), std::end(kSeedData), out);
-  }
-};
-
-// use_default_initialization<T> indicates whether the random engine
-// T must be default initialized, or whether we may initialize it using
-// a seed sequence. This is used because some engines do not accept seed
-// sequence-based initialization.
-template <typename E>
-using use_default_initialization = std::false_type;
-
-// make_engine<T, SSeq> returns a random_engine which is initialized,
-// either via the default constructor, when use_default_initialization<T>
-// is true, or via the indicated seed sequence, SSeq.
-template <typename Engine, typename SSeq = PrecompiledSeedSeq>
-typename absl::enable_if_t<!use_default_initialization<Engine>::value, Engine>
-make_engine() {
-  // Initialize the random engine using the seed sequence SSeq, which
-  // is constructed from the precompiled seed data.
-  SSeq seq(std::begin(kSeedData), std::end(kSeedData));
-  return Engine(seq);
-}
-
-template <typename Engine, typename SSeq = PrecompiledSeedSeq>
-typename absl::enable_if_t<use_default_initialization<Engine>::value, Engine>
-make_engine() {
-  // Initialize the random engine using the default constructor.
-  return Engine();
-}
-
-template <typename Engine, typename SSeq>
-void BM_Construct(benchmark::State& state) {
-  for (auto _ : state) {
-    auto rng = make_engine<Engine, SSeq>();
-    benchmark::DoNotOptimize(rng());
-  }
-}
-
-template <typename Engine>
-void BM_Direct(benchmark::State& state) {
-  using value_type = typename Engine::result_type;
-  // Direct use of the URBG.
-  auto rng = make_engine<Engine>();
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(rng());
-  }
-  state.SetBytesProcessed(sizeof(value_type) * state.iterations());
-}
-
-template <typename Engine>
-void BM_Generate(benchmark::State& state) {
-  // std::generate makes a copy of the RNG; thus this tests the
-  // copy-constructor efficiency.
-  using value_type = typename Engine::result_type;
-  std::vector<value_type> v(64);
-  auto rng = make_engine<Engine>();
-  while (state.KeepRunningBatch(64)) {
-    std::generate(std::begin(v), std::end(v), rng);
-  }
-}
-
-template <typename Engine, size_t elems>
-void BM_Shuffle(benchmark::State& state) {
-  // Direct use of the Engine.
-  std::vector<uint32_t> v(elems);
-  while (state.KeepRunningBatch(elems)) {
-    auto rng = make_engine<Engine>();
-    std::shuffle(std::begin(v), std::end(v), rng);
-  }
-}
-
-template <typename Engine, size_t elems>
-void BM_ShuffleReuse(benchmark::State& state) {
-  // Direct use of the Engine.
-  std::vector<uint32_t> v(elems);
-  auto rng = make_engine<Engine>();
-  while (state.KeepRunningBatch(elems)) {
-    std::shuffle(std::begin(v), std::end(v), rng);
-  }
-}
-
-template <typename Engine, typename Dist, typename... Args>
-void BM_Dist(benchmark::State& state, Args&&... args) {
-  using value_type = typename Dist::result_type;
-  auto rng = make_engine<Engine>();
-  Dist dis{std::forward<Args>(args)...};
-  // Compare the following loop performance:
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(dis(rng));
-  }
-  state.SetBytesProcessed(sizeof(value_type) * state.iterations());
-}
-
-template <typename Engine, typename Dist>
-void BM_Large(benchmark::State& state) {
-  using value_type = typename Dist::result_type;
-  volatile value_type kMin = 0;
-  volatile value_type kMax = std::numeric_limits<value_type>::max() / 2 + 1;
-  BM_Dist<Engine, Dist>(state, kMin, kMax);
-}
-
-template <typename Engine, typename Dist>
-void BM_Small(benchmark::State& state) {
-  using value_type = typename Dist::result_type;
-  volatile value_type kMin = 0;
-  volatile value_type kMax = std::numeric_limits<value_type>::max() / 64 + 1;
-  BM_Dist<Engine, Dist>(state, kMin, kMax);
-}
-
-template <typename Engine, typename Dist, int A>
-void BM_Bernoulli(benchmark::State& state) {
-  volatile double a = static_cast<double>(A) / 1000000;
-  BM_Dist<Engine, Dist>(state, a);
-}
-
-template <typename Engine, typename Dist, int A, int B>
-void BM_Beta(benchmark::State& state) {
-  using value_type = typename Dist::result_type;
-  volatile value_type a = static_cast<value_type>(A) / 100;
-  volatile value_type b = static_cast<value_type>(B) / 100;
-  BM_Dist<Engine, Dist>(state, a, b);
-}
-
-template <typename Engine, typename Dist, int A>
-void BM_Gamma(benchmark::State& state) {
-  using value_type = typename Dist::result_type;
-  volatile value_type a = static_cast<value_type>(A) / 100;
-  BM_Dist<Engine, Dist>(state, a);
-}
-
-template <typename Engine, typename Dist, int A = 100>
-void BM_Poisson(benchmark::State& state) {
-  volatile double a = static_cast<double>(A) / 100;
-  BM_Dist<Engine, Dist>(state, a);
-}
-
-template <typename Engine, typename Dist, int Q = 2, int V = 1>
-void BM_Zipf(benchmark::State& state) {
-  using value_type = typename Dist::result_type;
-  volatile double q = Q;
-  volatile double v = V;
-  BM_Dist<Engine, Dist>(state, std::numeric_limits<value_type>::max(), q, v);
-}
-
-template <typename Engine, typename Dist>
-void BM_Thread(benchmark::State& state) {
-  using value_type = typename Dist::result_type;
-  auto rng = make_engine<Engine>();
-  Dist dis{};
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(dis(rng));
-  }
-  state.SetBytesProcessed(sizeof(value_type) * state.iterations());
-}
-
-// NOTES:
-//
-// std::geometric_distribution is similar to the zipf distributions.
-// The algorithm for the geometric_distribution is, basically,
-// floor(log(1-X) / log(1-p))
-
-// Normal benchmark suite
-#define BM_BASIC(Engine)                                                       \
-  BENCHMARK_TEMPLATE(BM_Construct, Engine, PrecompiledSeedSeq);                \
-  BENCHMARK_TEMPLATE(BM_Construct, Engine, std::seed_seq);                     \
-  BENCHMARK_TEMPLATE(BM_Direct, Engine);                                       \
-  BENCHMARK_TEMPLATE(BM_Shuffle, Engine, 10);                                  \
-  BENCHMARK_TEMPLATE(BM_Shuffle, Engine, 100);                                 \
-  BENCHMARK_TEMPLATE(BM_Shuffle, Engine, 1000);                                \
-  BENCHMARK_TEMPLATE(BM_ShuffleReuse, Engine, 100);                            \
-  BENCHMARK_TEMPLATE(BM_ShuffleReuse, Engine, 1000);                           \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine,                                          \
-                     absl::random_internal::FastUniformBits<uint32_t>);        \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine,                                          \
-                     absl::random_internal::FastUniformBits<uint64_t>);        \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::uniform_int_distribution<int32_t>); \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::uniform_int_distribution<int64_t>); \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine,                                          \
-                     absl::uniform_int_distribution<int32_t>);                 \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine,                                          \
-                     absl::uniform_int_distribution<int64_t>);                 \
-  BENCHMARK_TEMPLATE(BM_Large, Engine,                                         \
-                     std::uniform_int_distribution<int32_t>);                  \
-  BENCHMARK_TEMPLATE(BM_Large, Engine,                                         \
-                     std::uniform_int_distribution<int64_t>);                  \
-  BENCHMARK_TEMPLATE(BM_Large, Engine,                                         \
-                     absl::uniform_int_distribution<int32_t>);                 \
-  BENCHMARK_TEMPLATE(BM_Large, Engine,                                         \
-                     absl::uniform_int_distribution<int64_t>);                 \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::uniform_real_distribution<float>);  \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::uniform_real_distribution<double>); \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, absl::uniform_real_distribution<float>); \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, absl::uniform_real_distribution<double>)
-
-#define BM_COPY(Engine) BENCHMARK_TEMPLATE(BM_Generate, Engine)
-
-#define BM_THREAD(Engine)                                           \
-  BENCHMARK_TEMPLATE(BM_Thread, Engine,                             \
-                     absl::uniform_int_distribution<int64_t>)       \
-      ->ThreadPerCpu();                                             \
-  BENCHMARK_TEMPLATE(BM_Thread, Engine,                             \
-                     absl::uniform_real_distribution<double>)       \
-      ->ThreadPerCpu();                                             \
-  BENCHMARK_TEMPLATE(BM_Shuffle, Engine, 100)->ThreadPerCpu();      \
-  BENCHMARK_TEMPLATE(BM_Shuffle, Engine, 1000)->ThreadPerCpu();     \
-  BENCHMARK_TEMPLATE(BM_ShuffleReuse, Engine, 100)->ThreadPerCpu(); \
-  BENCHMARK_TEMPLATE(BM_ShuffleReuse, Engine, 1000)->ThreadPerCpu();
-
-#define BM_EXTENDED(Engine)                                                    \
-  /* -------------- Extended Uniform -----------------------*/                 \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     std::uniform_int_distribution<int32_t>);                  \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     std::uniform_int_distribution<int64_t>);                  \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     absl::uniform_int_distribution<int32_t>);                 \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     absl::uniform_int_distribution<int64_t>);                 \
-  BENCHMARK_TEMPLATE(BM_Small, Engine, std::uniform_real_distribution<float>); \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     std::uniform_real_distribution<double>);                  \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     absl::uniform_real_distribution<float>);                  \
-  BENCHMARK_TEMPLATE(BM_Small, Engine,                                         \
-                     absl::uniform_real_distribution<double>);                 \
-  /* -------------- Other -----------------------*/                            \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::normal_distribution<double>);       \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, absl::gaussian_distribution<double>);    \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::exponential_distribution<double>);  \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, absl::exponential_distribution<double>); \
-  BENCHMARK_TEMPLATE(BM_Poisson, Engine, std::poisson_distribution<int64_t>,   \
-                     100);                                                     \
-  BENCHMARK_TEMPLATE(BM_Poisson, Engine, absl::poisson_distribution<int64_t>,  \
-                     100);                                                     \
-  BENCHMARK_TEMPLATE(BM_Poisson, Engine, std::poisson_distribution<int64_t>,   \
-                     10 * 100);                                                \
-  BENCHMARK_TEMPLATE(BM_Poisson, Engine, absl::poisson_distribution<int64_t>,  \
-                     10 * 100);                                                \
-  BENCHMARK_TEMPLATE(BM_Poisson, Engine, std::poisson_distribution<int64_t>,   \
-                     13 * 100);                                                \
-  BENCHMARK_TEMPLATE(BM_Poisson, Engine, absl::poisson_distribution<int64_t>,  \
-                     13 * 100);                                                \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine,                                          \
-                     absl::log_uniform_int_distribution<int32_t>);             \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine,                                          \
-                     absl::log_uniform_int_distribution<int64_t>);             \
-  BENCHMARK_TEMPLATE(BM_Dist, Engine, std::geometric_distribution<int64_t>);   \
-  BENCHMARK_TEMPLATE(BM_Zipf, Engine, absl::zipf_distribution<uint64_t>);      \
-  BENCHMARK_TEMPLATE(BM_Zipf, Engine, absl::zipf_distribution<uint64_t>, 2,    \
-                     3);                                                       \
-  BENCHMARK_TEMPLATE(BM_Bernoulli, Engine, std::bernoulli_distribution,        \
-                     257305);                                                  \
-  BENCHMARK_TEMPLATE(BM_Bernoulli, Engine, absl::bernoulli_distribution,       \
-                     257305);                                                  \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<double>, 65,     \
-                     41);                                                      \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<double>, 99,     \
-                     330);                                                     \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<double>, 150,    \
-                     150);                                                     \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<double>, 410,    \
-                     580);                                                     \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<float>, 65, 41); \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<float>, 99,      \
-                     330);                                                     \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<float>, 150,     \
-                     150);                                                     \
-  BENCHMARK_TEMPLATE(BM_Beta, Engine, absl::beta_distribution<float>, 410,     \
-                     580);                                                     \
-  BENCHMARK_TEMPLATE(BM_Gamma, Engine, std::gamma_distribution<float>, 199);   \
-  BENCHMARK_TEMPLATE(BM_Gamma, Engine, std::gamma_distribution<double>, 199);
-
-// ABSL Recommended interfaces.
-BM_BASIC(absl::InsecureBitGen);  // === pcg64_2018_engine
-BM_BASIC(absl::BitGen);    // === randen_engine<uint64_t>.
-BM_THREAD(absl::BitGen);
-BM_EXTENDED(absl::BitGen);
-
-// Instantiate benchmarks for multiple engines.
-using randen_engine_64 = absl::random_internal::randen_engine<uint64_t>;
-using randen_engine_32 = absl::random_internal::randen_engine<uint32_t>;
-
-// Comparison interfaces.
-BM_BASIC(std::mt19937_64);
-BM_COPY(std::mt19937_64);
-BM_EXTENDED(std::mt19937_64);
-BM_BASIC(randen_engine_64);
-BM_COPY(randen_engine_64);
-BM_EXTENDED(randen_engine_64);
-
-BM_BASIC(std::mt19937);
-BM_COPY(std::mt19937);
-BM_BASIC(randen_engine_32);
-BM_COPY(randen_engine_32);
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/bernoulli_distribution.h b/third_party/abseil/absl/random/bernoulli_distribution.h
deleted file mode 100644
index 25bd0d5..0000000
--- a/third_party/abseil/absl/random/bernoulli_distribution.h
+++ /dev/null
@@ -1,200 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_BERNOULLI_DISTRIBUTION_H_
-#define ABSL_RANDOM_BERNOULLI_DISTRIBUTION_H_
-
-#include <cstdint>
-#include <istream>
-#include <limits>
-
-#include "absl/base/optimization.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::bernoulli_distribution is a drop in replacement for
-// std::bernoulli_distribution. It guarantees that (given a perfect
-// UniformRandomBitGenerator) the acceptance probability is *exactly* equal to
-// the given double.
-//
-// The implementation assumes that double is IEEE754
-class bernoulli_distribution {
- public:
-  using result_type = bool;
-
-  class param_type {
-   public:
-    using distribution_type = bernoulli_distribution;
-
-    explicit param_type(double p = 0.5) : prob_(p) {
-      assert(p >= 0.0 && p <= 1.0);
-    }
-
-    double p() const { return prob_; }
-
-    friend bool operator==(const param_type& p1, const param_type& p2) {
-      return p1.p() == p2.p();
-    }
-    friend bool operator!=(const param_type& p1, const param_type& p2) {
-      return p1.p() != p2.p();
-    }
-
-   private:
-    double prob_;
-  };
-
-  bernoulli_distribution() : bernoulli_distribution(0.5) {}
-
-  explicit bernoulli_distribution(double p) : param_(p) {}
-
-  explicit bernoulli_distribution(param_type p) : param_(p) {}
-
-  // no-op
-  void reset() {}
-
-  template <typename URBG>
-  bool operator()(URBG& g) {  // NOLINT(runtime/references)
-    return Generate(param_.p(), g);
-  }
-
-  template <typename URBG>
-  bool operator()(URBG& g,  // NOLINT(runtime/references)
-                  const param_type& param) {
-    return Generate(param.p(), g);
-  }
-
-  param_type param() const { return param_; }
-  void param(const param_type& param) { param_ = param; }
-
-  double p() const { return param_.p(); }
-
-  result_type(min)() const { return false; }
-  result_type(max)() const { return true; }
-
-  friend bool operator==(const bernoulli_distribution& d1,
-                         const bernoulli_distribution& d2) {
-    return d1.param_ == d2.param_;
-  }
-
-  friend bool operator!=(const bernoulli_distribution& d1,
-                         const bernoulli_distribution& d2) {
-    return d1.param_ != d2.param_;
-  }
-
- private:
-  static constexpr uint64_t kP32 = static_cast<uint64_t>(1) << 32;
-
-  template <typename URBG>
-  static bool Generate(double p, URBG& g);  // NOLINT(runtime/references)
-
-  param_type param_;
-};
-
-template <typename CharT, typename Traits>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const bernoulli_distribution& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<double>::kPrecision);
-  os << x.p();
-  return os;
-}
-
-template <typename CharT, typename Traits>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    bernoulli_distribution& x) {            // NOLINT(runtime/references)
-  auto saver = random_internal::make_istream_state_saver(is);
-  auto p = random_internal::read_floating_point<double>(is);
-  if (!is.fail()) {
-    x.param(bernoulli_distribution::param_type(p));
-  }
-  return is;
-}
-
-template <typename URBG>
-bool bernoulli_distribution::Generate(double p,
-                                      URBG& g) {  // NOLINT(runtime/references)
-  random_internal::FastUniformBits<uint32_t> fast_u32;
-
-  while (true) {
-    // There are two aspects of the definition of `c` below that are worth
-    // commenting on.  First, because `p` is in the range [0, 1], `c` is in the
-    // range [0, 2^32] which does not fit in a uint32_t and therefore requires
-    // 64 bits.
-    //
-    // Second, `c` is constructed by first casting explicitly to a signed
-    // integer and then converting implicitly to an unsigned integer of the same
-    // size.  This is done because the hardware conversion instructions produce
-    // signed integers from double; if taken as a uint64_t the conversion would
-    // be wrong for doubles greater than 2^63 (not relevant in this use-case).
-    // If converted directly to an unsigned integer, the compiler would end up
-    // emitting code to handle such large values that are not relevant due to
-    // the known bounds on `c`.  To avoid these extra instructions this
-    // implementation converts first to the signed type and then use the
-    // implicit conversion to unsigned (which is a no-op).
-    const uint64_t c = static_cast<int64_t>(p * kP32);
-    const uint32_t v = fast_u32(g);
-    // FAST PATH: this path fails with probability 1/2^32.  Note that simply
-    // returning v <= c would approximate P very well (up to an absolute error
-    // of 1/2^32); the slow path (taken in that range of possible error, in the
-    // case of equality) eliminates the remaining error.
-    if (ABSL_PREDICT_TRUE(v != c)) return v < c;
-
-    // It is guaranteed that `q` is strictly less than 1, because if `q` were
-    // greater than or equal to 1, the same would be true for `p`. Certainly `p`
-    // cannot be greater than 1, and if `p == 1`, then the fast path would
-    // necessary have been taken already.
-    const double q = static_cast<double>(c) / kP32;
-
-    // The probability of acceptance on the fast path is `q` and so the
-    // probability of acceptance here should be `p - q`.
-    //
-    // Note that `q` is obtained from `p` via some shifts and conversions, the
-    // upshot of which is that `q` is simply `p` with some of the
-    // least-significant bits of its mantissa set to zero. This means that the
-    // difference `p - q` will not have any rounding errors. To see why, pretend
-    // that double has 10 bits of resolution and q is obtained from `p` in such
-    // a way that the 4 least-significant bits of its mantissa are set to zero.
-    // For example:
-    //   p   = 1.1100111011 * 2^-1
-    //   q   = 1.1100110000 * 2^-1
-    // p - q = 1.011        * 2^-8
-    // The difference `p - q` has exactly the nonzero mantissa bits that were
-    // "lost" in `q` producing a number which is certainly representable in a
-    // double.
-    const double left = p - q;
-
-    // By construction, the probability of being on this slow path is 1/2^32, so
-    // P(accept in slow path) = P(accept| in slow path) * P(slow path),
-    // which means the probability of acceptance here is `1 / (left * kP32)`:
-    const double here = left * kP32;
-
-    // The simplest way to compute the result of this trial is to repeat the
-    // whole algorithm with the new probability. This terminates because even
-    // given  arbitrarily unfriendly "random" bits, each iteration either
-    // multiplies a tiny probability by 2^32 (if c == 0) or strips off some
-    // number of nonzero mantissa bits. That process is bounded.
-    if (here == 0) return false;
-    p = here;
-  }
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_BERNOULLI_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/bernoulli_distribution_test.cc b/third_party/abseil/absl/random/bernoulli_distribution_test.cc
deleted file mode 100644
index b250f87..0000000
--- a/third_party/abseil/absl/random/bernoulli_distribution_test.cc
+++ /dev/null
@@ -1,217 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/bernoulli_distribution.h"
-
-#include <cmath>
-#include <cstddef>
-#include <random>
-#include <sstream>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-
-namespace {
-
-class BernoulliTest : public testing::TestWithParam<std::pair<double, size_t>> {
-};
-
-TEST_P(BernoulliTest, Serialize) {
-  const double d = GetParam().first;
-  absl::bernoulli_distribution before(d);
-
-  {
-    absl::bernoulli_distribution via_param{
-        absl::bernoulli_distribution::param_type(d)};
-    EXPECT_EQ(via_param, before);
-  }
-
-  std::stringstream ss;
-  ss << before;
-  absl::bernoulli_distribution after(0.6789);
-
-  EXPECT_NE(before.p(), after.p());
-  EXPECT_NE(before.param(), after.param());
-  EXPECT_NE(before, after);
-
-  ss >> after;
-
-  EXPECT_EQ(before.p(), after.p());
-  EXPECT_EQ(before.param(), after.param());
-  EXPECT_EQ(before, after);
-}
-
-TEST_P(BernoulliTest, Accuracy) {
-  // Sadly, the claim to fame for this implementation is precise accuracy, which
-  // is very, very hard to measure, the improvements come as trials approach the
-  // limit of double accuracy; thus the outcome differs from the
-  // std::bernoulli_distribution with a probability of approximately 1 in 2^-53.
-  const std::pair<double, size_t> para = GetParam();
-  size_t trials = para.second;
-  double p = para.first;
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng(0x2B7E151628AED2A6);
-
-  size_t yes = 0;
-  absl::bernoulli_distribution dist(p);
-  for (size_t i = 0; i < trials; ++i) {
-    if (dist(rng)) yes++;
-  }
-
-  // Compute the distribution parameters for a binomial test, using a normal
-  // approximation for the confidence interval, as there are a sufficiently
-  // large number of trials that the central limit theorem applies.
-  const double stddev_p = std::sqrt((p * (1.0 - p)) / trials);
-  const double expected = trials * p;
-  const double stddev = trials * stddev_p;
-
-  // 5 sigma, approved by Richard Feynman
-  EXPECT_NEAR(yes, expected, 5 * stddev)
-      << "@" << p << ", "
-      << std::abs(static_cast<double>(yes) - expected) / stddev << " stddev";
-}
-
-// There must be many more trials to make the mean approximately normal for `p`
-// closes to 0 or 1.
-INSTANTIATE_TEST_SUITE_P(
-    All, BernoulliTest,
-    ::testing::Values(
-        // Typical values.
-        std::make_pair(0, 30000), std::make_pair(1e-3, 30000000),
-        std::make_pair(0.1, 3000000), std::make_pair(0.5, 3000000),
-        std::make_pair(0.9, 30000000), std::make_pair(0.999, 30000000),
-        std::make_pair(1, 30000),
-        // Boundary cases.
-        std::make_pair(std::nextafter(1.0, 0.0), 1),  // ~1 - epsilon
-        std::make_pair(std::numeric_limits<double>::epsilon(), 1),
-        std::make_pair(std::nextafter(std::numeric_limits<double>::min(),
-                                      1.0),  // min + epsilon
-                       1),
-        std::make_pair(std::numeric_limits<double>::min(),  // smallest normal
-                       1),
-        std::make_pair(
-            std::numeric_limits<double>::denorm_min(),  // smallest denorm
-            1),
-        std::make_pair(std::numeric_limits<double>::min() / 2, 1),  // denorm
-        std::make_pair(std::nextafter(std::numeric_limits<double>::min(),
-                                      0.0),  // denorm_max
-                       1)));
-
-// NOTE: absl::bernoulli_distribution is not guaranteed to be stable.
-TEST(BernoulliTest, StabilityTest) {
-  // absl::bernoulli_distribution stability relies on FastUniformBits and
-  // integer arithmetic.
-  absl::random_internal::sequence_urbg urbg({
-      0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-      0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-      0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-      0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull,
-      0x4864f22c059bf29eull, 0x247856d8b862665cull, 0xe46e86e9a1337e10ull,
-      0xd8c8541f3519b133ull, 0xe75b5162c567b9e4ull, 0xf732e5ded7009c5bull,
-      0xb170b98353121eacull, 0x1ec2e8986d2362caull, 0x814c8e35fe9a961aull,
-      0x0c3cd59c9b638a02ull, 0xcb3bb6478a07715cull, 0x1224e62c978bbc7full,
-      0x671ef2cb04e81f6eull, 0x3c1cbd811eaf1808ull, 0x1bbc23cfa8fac721ull,
-      0xa4c2cda65e596a51ull, 0xb77216fad37adf91ull, 0x836d794457c08849ull,
-      0xe083df03475f49d7ull, 0xbc9feb512e6b0d6cull, 0xb12d74fdd718c8c5ull,
-      0x12ff09653bfbe4caull, 0x8dd03a105bc4ee7eull, 0x5738341045ba0d85ull,
-      0xe3fd722dc65ad09eull, 0x5a14fd21ea2a5705ull, 0x14e6ea4d6edb0c73ull,
-      0x275b0dc7e0a18acfull, 0x36cebe0d2653682eull, 0x0361e9b23861596bull,
-  });
-
-  // Generate a string of '0' and '1' for the distribution output.
-  auto generate = [&urbg](absl::bernoulli_distribution& dist) {
-    std::string output;
-    output.reserve(36);
-    urbg.reset();
-    for (int i = 0; i < 35; i++) {
-      output.append(dist(urbg) ? "1" : "0");
-    }
-    return output;
-  };
-
-  const double kP = 0.0331289862362;
-  {
-    absl::bernoulli_distribution dist(kP);
-    auto v = generate(dist);
-    EXPECT_EQ(35, urbg.invocations());
-    EXPECT_EQ(v, "00000000000010000000000010000000000") << dist;
-  }
-  {
-    absl::bernoulli_distribution dist(kP * 10.0);
-    auto v = generate(dist);
-    EXPECT_EQ(35, urbg.invocations());
-    EXPECT_EQ(v, "00000100010010010010000011000011010") << dist;
-  }
-  {
-    absl::bernoulli_distribution dist(kP * 20.0);
-    auto v = generate(dist);
-    EXPECT_EQ(35, urbg.invocations());
-    EXPECT_EQ(v, "00011110010110110011011111110111011") << dist;
-  }
-  {
-    absl::bernoulli_distribution dist(1.0 - kP);
-    auto v = generate(dist);
-    EXPECT_EQ(35, urbg.invocations());
-    EXPECT_EQ(v, "11111111111111111111011111111111111") << dist;
-  }
-}
-
-TEST(BernoulliTest, StabilityTest2) {
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  // Generate a string of '0' and '1' for the distribution output.
-  auto generate = [&urbg](absl::bernoulli_distribution& dist) {
-    std::string output;
-    output.reserve(13);
-    urbg.reset();
-    for (int i = 0; i < 12; i++) {
-      output.append(dist(urbg) ? "1" : "0");
-    }
-    return output;
-  };
-
-  constexpr double b0 = 1.0 / 13.0 / 0.2;
-  constexpr double b1 = 2.0 / 13.0 / 0.2;
-  constexpr double b3 = (5.0 / 13.0 / 0.2) - ((1 - b0) + (1 - b1) + (1 - b1));
-  {
-    absl::bernoulli_distribution dist(b0);
-    auto v = generate(dist);
-    EXPECT_EQ(12, urbg.invocations());
-    EXPECT_EQ(v, "000011100101") << dist;
-  }
-  {
-    absl::bernoulli_distribution dist(b1);
-    auto v = generate(dist);
-    EXPECT_EQ(12, urbg.invocations());
-    EXPECT_EQ(v, "001111101101") << dist;
-  }
-  {
-    absl::bernoulli_distribution dist(b3);
-    auto v = generate(dist);
-    EXPECT_EQ(12, urbg.invocations());
-    EXPECT_EQ(v, "001111101111") << dist;
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/beta_distribution.h b/third_party/abseil/absl/random/beta_distribution.h
deleted file mode 100644
index c154066..0000000
--- a/third_party/abseil/absl/random/beta_distribution.h
+++ /dev/null
@@ -1,427 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_BETA_DISTRIBUTION_H_
-#define ABSL_RANDOM_BETA_DISTRIBUTION_H_
-
-#include <cassert>
-#include <cmath>
-#include <istream>
-#include <limits>
-#include <ostream>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/fastmath.h"
-#include "absl/random/internal/generate_real.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::beta_distribution:
-// Generate a floating-point variate conforming to a Beta distribution:
-//   pdf(x) \propto x^(alpha-1) * (1-x)^(beta-1),
-// where the params alpha and beta are both strictly positive real values.
-//
-// The support is the open interval (0, 1), but the return value might be equal
-// to 0 or 1, due to numerical errors when alpha and beta are very different.
-//
-// Usage note: One usage is that alpha and beta are counts of number of
-// successes and failures. When the total number of trials are large, consider
-// approximating a beta distribution with a Gaussian distribution with the same
-// mean and variance. One could use the skewness, which depends only on the
-// smaller of alpha and beta when the number of trials are sufficiently large,
-// to quantify how far a beta distribution is from the normal distribution.
-template <typename RealType = double>
-class beta_distribution {
- public:
-  using result_type = RealType;
-
-  class param_type {
-   public:
-    using distribution_type = beta_distribution;
-
-    explicit param_type(result_type alpha, result_type beta)
-        : alpha_(alpha), beta_(beta) {
-      assert(alpha >= 0);
-      assert(beta >= 0);
-      assert(alpha <= (std::numeric_limits<result_type>::max)());
-      assert(beta <= (std::numeric_limits<result_type>::max)());
-      if (alpha == 0 || beta == 0) {
-        method_ = DEGENERATE_SMALL;
-        x_ = (alpha >= beta) ? 1 : 0;
-        return;
-      }
-      // a_ = min(beta, alpha), b_ = max(beta, alpha).
-      if (beta < alpha) {
-        inverted_ = true;
-        a_ = beta;
-        b_ = alpha;
-      } else {
-        inverted_ = false;
-        a_ = alpha;
-        b_ = beta;
-      }
-      if (a_ <= 1 && b_ >= ThresholdForLargeA()) {
-        method_ = DEGENERATE_SMALL;
-        x_ = inverted_ ? result_type(1) : result_type(0);
-        return;
-      }
-      // For threshold values, see also:
-      // Evaluation of Beta Generation Algorithms, Ying-Chao Hung, et. al.
-      // February, 2009.
-      if ((b_ < 1.0 && a_ + b_ <= 1.2) || a_ <= ThresholdForSmallA()) {
-        // Choose Joehnk over Cheng when it's faster or when Cheng encounters
-        // numerical issues.
-        method_ = JOEHNK;
-        a_ = result_type(1) / alpha_;
-        b_ = result_type(1) / beta_;
-        if (std::isinf(a_) || std::isinf(b_)) {
-          method_ = DEGENERATE_SMALL;
-          x_ = inverted_ ? result_type(1) : result_type(0);
-        }
-        return;
-      }
-      if (a_ >= ThresholdForLargeA()) {
-        method_ = DEGENERATE_LARGE;
-        // Note: on PPC for long double, evaluating
-        // `std::numeric_limits::max() / ThresholdForLargeA` results in NaN.
-        result_type r = a_ / b_;
-        x_ = (inverted_ ? result_type(1) : r) / (1 + r);
-        return;
-      }
-      x_ = a_ + b_;
-      log_x_ = std::log(x_);
-      if (a_ <= 1) {
-        method_ = CHENG_BA;
-        y_ = result_type(1) / a_;
-        gamma_ = a_ + a_;
-        return;
-      }
-      method_ = CHENG_BB;
-      result_type r = (a_ - 1) / (b_ - 1);
-      y_ = std::sqrt((1 + r) / (b_ * r * 2 - r + 1));
-      gamma_ = a_ + result_type(1) / y_;
-    }
-
-    result_type alpha() const { return alpha_; }
-    result_type beta() const { return beta_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.alpha_ == b.alpha_ && a.beta_ == b.beta_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class beta_distribution;
-
-#ifdef _MSC_VER
-    // MSVC does not have constexpr implementations for std::log and std::exp
-    // so they are computed at runtime.
-#define ABSL_RANDOM_INTERNAL_LOG_EXP_CONSTEXPR
-#else
-#define ABSL_RANDOM_INTERNAL_LOG_EXP_CONSTEXPR constexpr
-#endif
-
-    // The threshold for whether std::exp(1/a) is finite.
-    // Note that this value is quite large, and a smaller a_ is NOT abnormal.
-    static ABSL_RANDOM_INTERNAL_LOG_EXP_CONSTEXPR result_type
-    ThresholdForSmallA() {
-      return result_type(1) /
-             std::log((std::numeric_limits<result_type>::max)());
-    }
-
-    // The threshold for whether a * std::log(a) is finite.
-    static ABSL_RANDOM_INTERNAL_LOG_EXP_CONSTEXPR result_type
-    ThresholdForLargeA() {
-      return std::exp(
-          std::log((std::numeric_limits<result_type>::max)()) -
-          std::log(std::log((std::numeric_limits<result_type>::max)())) -
-          ThresholdPadding());
-    }
-
-#undef ABSL_RANDOM_INTERNAL_LOG_EXP_CONSTEXPR
-
-    // Pad the threshold for large A for long double on PPC. This is done via a
-    // template specialization below.
-    static constexpr result_type ThresholdPadding() { return 0; }
-
-    enum Method {
-      JOEHNK,    // Uses algorithm Joehnk
-      CHENG_BA,  // Uses algorithm BA in Cheng
-      CHENG_BB,  // Uses algorithm BB in Cheng
-
-      // Note: See also:
-      //   Hung et al. Evaluation of beta generation algorithms. Communications
-      //   in Statistics-Simulation and Computation 38.4 (2009): 750-770.
-      // especially:
-      //   Zechner, Heinz, and Ernst Stadlober. Generating beta variates via
-      //   patchwork rejection. Computing 50.1 (1993): 1-18.
-
-      DEGENERATE_SMALL,  // a_ is abnormally small.
-      DEGENERATE_LARGE,  // a_ is abnormally large.
-    };
-
-    result_type alpha_;
-    result_type beta_;
-
-    result_type a_;  // the smaller of {alpha, beta}, or 1.0/alpha_ in JOEHNK
-    result_type b_;  // the larger of {alpha, beta}, or 1.0/beta_ in JOEHNK
-    result_type x_;  // alpha + beta, or the result in degenerate cases
-    result_type log_x_;  // log(x_)
-    result_type y_;      // "beta" in Cheng
-    result_type gamma_;  // "gamma" in Cheng
-
-    Method method_;
-
-    // Placing this last for optimal alignment.
-    // Whether alpha_ != a_, i.e. true iff alpha_ > beta_.
-    bool inverted_;
-
-    static_assert(std::is_floating_point<RealType>::value,
-                  "Class-template absl::beta_distribution<> must be "
-                  "parameterized using a floating-point type.");
-  };
-
-  beta_distribution() : beta_distribution(1) {}
-
-  explicit beta_distribution(result_type alpha, result_type beta = 1)
-      : param_(alpha, beta) {}
-
-  explicit beta_distribution(const param_type& p) : param_(p) {}
-
-  void reset() {}
-
-  // Generating functions
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  param_type param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  result_type(min)() const { return 0; }
-  result_type(max)() const { return 1; }
-
-  result_type alpha() const { return param_.alpha(); }
-  result_type beta() const { return param_.beta(); }
-
-  friend bool operator==(const beta_distribution& a,
-                         const beta_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const beta_distribution& a,
-                         const beta_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  template <typename URBG>
-  result_type AlgorithmJoehnk(URBG& g,  // NOLINT(runtime/references)
-                              const param_type& p);
-
-  template <typename URBG>
-  result_type AlgorithmCheng(URBG& g,  // NOLINT(runtime/references)
-                             const param_type& p);
-
-  template <typename URBG>
-  result_type DegenerateCase(URBG& g,  // NOLINT(runtime/references)
-                             const param_type& p) {
-    if (p.method_ == param_type::DEGENERATE_SMALL && p.alpha_ == p.beta_) {
-      // Returns 0 or 1 with equal probability.
-      random_internal::FastUniformBits<uint8_t> fast_u8;
-      return static_cast<result_type>((fast_u8(g) & 0x10) !=
-                                      0);  // pick any single bit.
-    }
-    return p.x_;
-  }
-
-  param_type param_;
-  random_internal::FastUniformBits<uint64_t> fast_u64_;
-};
-
-#if defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \
-    defined(__ppc__) || defined(__PPC__)
-// PPC needs a more stringent boundary for long double.
-template <>
-constexpr long double
-beta_distribution<long double>::param_type::ThresholdPadding() {
-  return 10;
-}
-#endif
-
-template <typename RealType>
-template <typename URBG>
-typename beta_distribution<RealType>::result_type
-beta_distribution<RealType>::AlgorithmJoehnk(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  using random_internal::GeneratePositiveTag;
-  using random_internal::GenerateRealFromBits;
-  using real_type =
-      absl::conditional_t<std::is_same<RealType, float>::value, float, double>;
-
-  // Based on Joehnk, M. D. Erzeugung von betaverteilten und gammaverteilten
-  // Zufallszahlen. Metrika 8.1 (1964): 5-15.
-  // This method is described in Knuth, Vol 2 (Third Edition), pp 134.
-
-  result_type u, v, x, y, z;
-  for (;;) {
-    u = GenerateRealFromBits<real_type, GeneratePositiveTag, false>(
-        fast_u64_(g));
-    v = GenerateRealFromBits<real_type, GeneratePositiveTag, false>(
-        fast_u64_(g));
-
-    // Direct method. std::pow is slow for float, so rely on the optimizer to
-    // remove the std::pow() path for that case.
-    if (!std::is_same<float, result_type>::value) {
-      x = std::pow(u, p.a_);
-      y = std::pow(v, p.b_);
-      z = x + y;
-      if (z > 1) {
-        // Reject if and only if `x + y > 1.0`
-        continue;
-      }
-      if (z > 0) {
-        // When both alpha and beta are small, x and y are both close to 0, so
-        // divide by (x+y) directly may result in nan.
-        return x / z;
-      }
-    }
-
-    // Log transform.
-    // x = log( pow(u, p.a_) ), y = log( pow(v, p.b_) )
-    // since u, v <= 1.0,  x, y < 0.
-    x = std::log(u) * p.a_;
-    y = std::log(v) * p.b_;
-    if (!std::isfinite(x) || !std::isfinite(y)) {
-      continue;
-    }
-    // z = log( pow(u, a) + pow(v, b) )
-    z = x > y ? (x + std::log(1 + std::exp(y - x)))
-              : (y + std::log(1 + std::exp(x - y)));
-    // Reject iff log(x+y) > 0.
-    if (z > 0) {
-      continue;
-    }
-    return std::exp(x - z);
-  }
-}
-
-template <typename RealType>
-template <typename URBG>
-typename beta_distribution<RealType>::result_type
-beta_distribution<RealType>::AlgorithmCheng(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  using random_internal::GeneratePositiveTag;
-  using random_internal::GenerateRealFromBits;
-  using real_type =
-      absl::conditional_t<std::is_same<RealType, float>::value, float, double>;
-
-  // Based on Cheng, Russell CH. Generating beta variates with nonintegral
-  // shape parameters. Communications of the ACM 21.4 (1978): 317-322.
-  // (https://dl.acm.org/citation.cfm?id=359482).
-  static constexpr result_type kLogFour =
-      result_type(1.3862943611198906188344642429163531361);  // log(4)
-  static constexpr result_type kS =
-      result_type(2.6094379124341003746007593332261876);  // 1+log(5)
-
-  const bool use_algorithm_ba = (p.method_ == param_type::CHENG_BA);
-  result_type u1, u2, v, w, z, r, s, t, bw_inv, lhs;
-  for (;;) {
-    u1 = GenerateRealFromBits<real_type, GeneratePositiveTag, false>(
-        fast_u64_(g));
-    u2 = GenerateRealFromBits<real_type, GeneratePositiveTag, false>(
-        fast_u64_(g));
-    v = p.y_ * std::log(u1 / (1 - u1));
-    w = p.a_ * std::exp(v);
-    bw_inv = result_type(1) / (p.b_ + w);
-    r = p.gamma_ * v - kLogFour;
-    s = p.a_ + r - w;
-    z = u1 * u1 * u2;
-    if (!use_algorithm_ba && s + kS >= 5 * z) {
-      break;
-    }
-    t = std::log(z);
-    if (!use_algorithm_ba && s >= t) {
-      break;
-    }
-    lhs = p.x_ * (p.log_x_ + std::log(bw_inv)) + r;
-    if (lhs >= t) {
-      break;
-    }
-  }
-  return p.inverted_ ? (1 - w * bw_inv) : w * bw_inv;
-}
-
-template <typename RealType>
-template <typename URBG>
-typename beta_distribution<RealType>::result_type
-beta_distribution<RealType>::operator()(URBG& g,  // NOLINT(runtime/references)
-                                        const param_type& p) {
-  switch (p.method_) {
-    case param_type::JOEHNK:
-      return AlgorithmJoehnk(g, p);
-    case param_type::CHENG_BA:
-      ABSL_FALLTHROUGH_INTENDED;
-    case param_type::CHENG_BB:
-      return AlgorithmCheng(g, p);
-    default:
-      return DegenerateCase(g, p);
-  }
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const beta_distribution<RealType>& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<RealType>::kPrecision);
-  os << x.alpha() << os.fill() << x.beta();
-  return os;
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    beta_distribution<RealType>& x) {       // NOLINT(runtime/references)
-  using result_type = typename beta_distribution<RealType>::result_type;
-  using param_type = typename beta_distribution<RealType>::param_type;
-  result_type alpha, beta;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  alpha = random_internal::read_floating_point<result_type>(is);
-  if (is.fail()) return is;
-  beta = random_internal::read_floating_point<result_type>(is);
-  if (!is.fail()) {
-    x.param(param_type(alpha, beta));
-  }
-  return is;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_BETA_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/beta_distribution_test.cc b/third_party/abseil/absl/random/beta_distribution_test.cc
deleted file mode 100644
index 277e4dc..0000000
--- a/third_party/abseil/absl/random/beta_distribution_test.cc
+++ /dev/null
@@ -1,619 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/beta_distribution.h"
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_replace.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-template <typename IntType>
-class BetaDistributionInterfaceTest : public ::testing::Test {};
-
-using RealTypes = ::testing::Types<float, double, long double>;
-TYPED_TEST_CASE(BetaDistributionInterfaceTest, RealTypes);
-
-TYPED_TEST(BetaDistributionInterfaceTest, SerializeTest) {
-  // The threshold for whether std::exp(1/a) is finite.
-  const TypeParam kSmallA =
-      1.0f / std::log((std::numeric_limits<TypeParam>::max)());
-  // The threshold for whether a * std::log(a) is finite.
-  const TypeParam kLargeA =
-      std::exp(std::log((std::numeric_limits<TypeParam>::max)()) -
-               std::log(std::log((std::numeric_limits<TypeParam>::max)())));
-  const TypeParam kLargeAPPC = std::exp(
-      std::log((std::numeric_limits<TypeParam>::max)()) -
-      std::log(std::log((std::numeric_limits<TypeParam>::max)())) - 10.0f);
-  using param_type = typename absl::beta_distribution<TypeParam>::param_type;
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  const TypeParam kValues[] = {
-      TypeParam(1e-20), TypeParam(1e-12), TypeParam(1e-8), TypeParam(1e-4),
-      TypeParam(1e-3), TypeParam(0.1), TypeParam(0.25),
-      std::nextafter(TypeParam(0.5), TypeParam(0)),  // 0.5 - epsilon
-      std::nextafter(TypeParam(0.5), TypeParam(1)),  // 0.5 + epsilon
-      TypeParam(0.5), TypeParam(1.0),                //
-      std::nextafter(TypeParam(1), TypeParam(0)),    // 1 - epsilon
-      std::nextafter(TypeParam(1), TypeParam(2)),    // 1 + epsilon
-      TypeParam(12.5), TypeParam(1e2), TypeParam(1e8), TypeParam(1e12),
-      TypeParam(1e20),                        //
-      kSmallA,                                //
-      std::nextafter(kSmallA, TypeParam(0)),  //
-      std::nextafter(kSmallA, TypeParam(1)),  //
-      kLargeA,                                //
-      std::nextafter(kLargeA, TypeParam(0)),  //
-      std::nextafter(kLargeA, std::numeric_limits<TypeParam>::max()),
-      kLargeAPPC,  //
-      std::nextafter(kLargeAPPC, TypeParam(0)),
-      std::nextafter(kLargeAPPC, std::numeric_limits<TypeParam>::max()),
-      // Boundary cases.
-      std::numeric_limits<TypeParam>::max(),
-      std::numeric_limits<TypeParam>::epsilon(),
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(1)),                  // min + epsilon
-      std::numeric_limits<TypeParam>::min(),         // smallest normal
-      std::numeric_limits<TypeParam>::denorm_min(),  // smallest denorm
-      std::numeric_limits<TypeParam>::min() / 2,     // denorm
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(0)),  // denorm_max
-  };
-  for (TypeParam alpha : kValues) {
-    for (TypeParam beta : kValues) {
-      ABSL_INTERNAL_LOG(
-          INFO, absl::StrFormat("Smoke test for Beta(%a, %a)", alpha, beta));
-
-      param_type param(alpha, beta);
-      absl::beta_distribution<TypeParam> before(alpha, beta);
-      EXPECT_EQ(before.alpha(), param.alpha());
-      EXPECT_EQ(before.beta(), param.beta());
-
-      {
-        absl::beta_distribution<TypeParam> via_param(param);
-        EXPECT_EQ(via_param, before);
-        EXPECT_EQ(via_param.param(), before.param());
-      }
-
-      // Smoke test.
-      for (int i = 0; i < kCount; ++i) {
-        auto sample = before(gen);
-        EXPECT_TRUE(std::isfinite(sample));
-        EXPECT_GE(sample, before.min());
-        EXPECT_LE(sample, before.max());
-      }
-
-      // Validate stream serialization.
-      std::stringstream ss;
-      ss << before;
-      absl::beta_distribution<TypeParam> after(3.8f, 1.43f);
-      EXPECT_NE(before.alpha(), after.alpha());
-      EXPECT_NE(before.beta(), after.beta());
-      EXPECT_NE(before.param(), after.param());
-      EXPECT_NE(before, after);
-
-      ss >> after;
-
-#if defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \
-    defined(__ppc__) || defined(__PPC__)
-      if (std::is_same<TypeParam, long double>::value) {
-        // Roundtripping floating point values requires sufficient precision
-        // to reconstruct the exact value. It turns out that long double
-        // has some errors doing this on ppc.
-        if (alpha <= std::numeric_limits<double>::max() &&
-            alpha >= std::numeric_limits<double>::lowest()) {
-          EXPECT_EQ(static_cast<double>(before.alpha()),
-                    static_cast<double>(after.alpha()))
-              << ss.str();
-        }
-        if (beta <= std::numeric_limits<double>::max() &&
-            beta >= std::numeric_limits<double>::lowest()) {
-          EXPECT_EQ(static_cast<double>(before.beta()),
-                    static_cast<double>(after.beta()))
-              << ss.str();
-        }
-        continue;
-      }
-#endif
-
-      EXPECT_EQ(before.alpha(), after.alpha());
-      EXPECT_EQ(before.beta(), after.beta());
-      EXPECT_EQ(before, after)           //
-          << ss.str() << " "             //
-          << (ss.good() ? "good " : "")  //
-          << (ss.bad() ? "bad " : "")    //
-          << (ss.eof() ? "eof " : "")    //
-          << (ss.fail() ? "fail " : "");
-    }
-  }
-}
-
-TYPED_TEST(BetaDistributionInterfaceTest, DegenerateCases) {
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng(0x2B7E151628AED2A6);
-
-  // Extreme cases when the params are abnormal.
-  constexpr int kCount = 1000;
-  const TypeParam kSmallValues[] = {
-      std::numeric_limits<TypeParam>::min(),
-      std::numeric_limits<TypeParam>::denorm_min(),
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(0)),  // denorm_max
-      std::numeric_limits<TypeParam>::epsilon(),
-  };
-  const TypeParam kLargeValues[] = {
-      std::numeric_limits<TypeParam>::max() * static_cast<TypeParam>(0.9999),
-      std::numeric_limits<TypeParam>::max() - 1,
-      std::numeric_limits<TypeParam>::max(),
-  };
-  {
-    // Small alpha and beta.
-    // Useful WolframAlpha plots:
-    //   * plot InverseBetaRegularized[x, 0.0001, 0.0001] from 0.495 to 0.505
-    //   * Beta[1.0, 0.0000001, 0.0000001]
-    //   * Beta[0.9999, 0.0000001, 0.0000001]
-    for (TypeParam alpha : kSmallValues) {
-      for (TypeParam beta : kSmallValues) {
-        int zeros = 0;
-        int ones = 0;
-        absl::beta_distribution<TypeParam> d(alpha, beta);
-        for (int i = 0; i < kCount; ++i) {
-          TypeParam x = d(rng);
-          if (x == 0.0) {
-            zeros++;
-          } else if (x == 1.0) {
-            ones++;
-          }
-        }
-        EXPECT_EQ(ones + zeros, kCount);
-        if (alpha == beta) {
-          EXPECT_NE(ones, 0);
-          EXPECT_NE(zeros, 0);
-        }
-      }
-    }
-  }
-  {
-    // Small alpha, large beta.
-    // Useful WolframAlpha plots:
-    //   * plot InverseBetaRegularized[x, 0.0001, 10000] from 0.995 to 1
-    //   * Beta[0, 0.0000001, 1000000]
-    //   * Beta[0.001, 0.0000001, 1000000]
-    //   * Beta[1, 0.0000001, 1000000]
-    for (TypeParam alpha : kSmallValues) {
-      for (TypeParam beta : kLargeValues) {
-        absl::beta_distribution<TypeParam> d(alpha, beta);
-        for (int i = 0; i < kCount; ++i) {
-          EXPECT_EQ(d(rng), 0.0);
-        }
-      }
-    }
-  }
-  {
-    // Large alpha, small beta.
-    // Useful WolframAlpha plots:
-    //   * plot InverseBetaRegularized[x, 10000, 0.0001] from 0 to 0.001
-    //   * Beta[0.99, 1000000, 0.0000001]
-    //   * Beta[1, 1000000, 0.0000001]
-    for (TypeParam alpha : kLargeValues) {
-      for (TypeParam beta : kSmallValues) {
-        absl::beta_distribution<TypeParam> d(alpha, beta);
-        for (int i = 0; i < kCount; ++i) {
-          EXPECT_EQ(d(rng), 1.0);
-        }
-      }
-    }
-  }
-  {
-    // Large alpha and beta.
-    absl::beta_distribution<TypeParam> d(std::numeric_limits<TypeParam>::max(),
-                                         std::numeric_limits<TypeParam>::max());
-    for (int i = 0; i < kCount; ++i) {
-      EXPECT_EQ(d(rng), 0.5);
-    }
-  }
-  {
-    // Large alpha and beta but unequal.
-    absl::beta_distribution<TypeParam> d(
-        std::numeric_limits<TypeParam>::max(),
-        std::numeric_limits<TypeParam>::max() * 0.9999);
-    for (int i = 0; i < kCount; ++i) {
-      TypeParam x = d(rng);
-      EXPECT_NE(x, 0.5f);
-      EXPECT_FLOAT_EQ(x, 0.500025f);
-    }
-  }
-}
-
-class BetaDistributionModel {
- public:
-  explicit BetaDistributionModel(::testing::tuple<double, double> p)
-      : alpha_(::testing::get<0>(p)), beta_(::testing::get<1>(p)) {}
-
-  double Mean() const { return alpha_ / (alpha_ + beta_); }
-
-  double Variance() const {
-    return alpha_ * beta_ / (alpha_ + beta_ + 1) / (alpha_ + beta_) /
-           (alpha_ + beta_);
-  }
-
-  double Kurtosis() const {
-    return 3 + 6 *
-                   ((alpha_ - beta_) * (alpha_ - beta_) * (alpha_ + beta_ + 1) -
-                    alpha_ * beta_ * (2 + alpha_ + beta_)) /
-                   alpha_ / beta_ / (alpha_ + beta_ + 2) / (alpha_ + beta_ + 3);
-  }
-
- protected:
-  const double alpha_;
-  const double beta_;
-};
-
-class BetaDistributionTest
-    : public ::testing::TestWithParam<::testing::tuple<double, double>>,
-      public BetaDistributionModel {
- public:
-  BetaDistributionTest() : BetaDistributionModel(GetParam()) {}
-
- protected:
-  template <class D>
-  bool SingleZTestOnMeanAndVariance(double p, size_t samples);
-
-  template <class D>
-  bool SingleChiSquaredTest(double p, size_t samples, size_t buckets);
-
-  absl::InsecureBitGen rng_;
-};
-
-template <class D>
-bool BetaDistributionTest::SingleZTestOnMeanAndVariance(double p,
-                                                        size_t samples) {
-  D dis(alpha_, beta_);
-
-  std::vector<double> data;
-  data.reserve(samples);
-  for (size_t i = 0; i < samples; i++) {
-    const double variate = dis(rng_);
-    EXPECT_FALSE(std::isnan(variate));
-    // Note that equality is allowed on both sides.
-    EXPECT_GE(variate, 0.0);
-    EXPECT_LE(variate, 1.0);
-    data.push_back(variate);
-  }
-
-  // We validate that the sample mean and sample variance are indeed from a
-  // Beta distribution with the given shape parameters.
-  const auto m = absl::random_internal::ComputeDistributionMoments(data);
-
-  // The variance of the sample mean is variance / n.
-  const double mean_stddev = std::sqrt(Variance() / static_cast<double>(m.n));
-
-  // The variance of the sample variance is (approximately):
-  //   (kurtosis - 1) * variance^2 / n
-  const double variance_stddev = std::sqrt(
-      (Kurtosis() - 1) * Variance() * Variance() / static_cast<double>(m.n));
-  // z score for the sample variance.
-  const double z_variance = (m.variance - Variance()) / variance_stddev;
-
-  const double max_err = absl::random_internal::MaxErrorTolerance(p);
-  const double z_mean = absl::random_internal::ZScore(Mean(), m);
-  const bool pass =
-      absl::random_internal::Near("z", z_mean, 0.0, max_err) &&
-      absl::random_internal::Near("z_variance", z_variance, 0.0, max_err);
-  if (!pass) {
-    ABSL_INTERNAL_LOG(
-        INFO,
-        absl::StrFormat(
-            "Beta(%f, %f), "
-            "mean: sample %f, expect %f, which is %f stddevs away, "
-            "variance: sample %f, expect %f, which is %f stddevs away.",
-            alpha_, beta_, m.mean, Mean(),
-            std::abs(m.mean - Mean()) / mean_stddev, m.variance, Variance(),
-            std::abs(m.variance - Variance()) / variance_stddev));
-  }
-  return pass;
-}
-
-template <class D>
-bool BetaDistributionTest::SingleChiSquaredTest(double p, size_t samples,
-                                                size_t buckets) {
-  constexpr double kErr = 1e-7;
-  std::vector<double> cutoffs, expected;
-  const double bucket_width = 1.0 / static_cast<double>(buckets);
-  int i = 1;
-  int unmerged_buckets = 0;
-  for (; i < buckets; ++i) {
-    const double p = bucket_width * static_cast<double>(i);
-    const double boundary =
-        absl::random_internal::BetaIncompleteInv(alpha_, beta_, p);
-    // The intention is to add `boundary` to the list of `cutoffs`. It becomes
-    // problematic, however, when the boundary values are not monotone, due to
-    // numerical issues when computing the inverse regularized incomplete
-    // Beta function. In these cases, we merge that bucket with its previous
-    // neighbor and merge their expected counts.
-    if ((cutoffs.empty() && boundary < kErr) ||
-        (!cutoffs.empty() && boundary <= cutoffs.back())) {
-      unmerged_buckets++;
-      continue;
-    }
-    if (boundary >= 1.0 - 1e-10) {
-      break;
-    }
-    cutoffs.push_back(boundary);
-    expected.push_back(static_cast<double>(1 + unmerged_buckets) *
-                       bucket_width * static_cast<double>(samples));
-    unmerged_buckets = 0;
-  }
-  cutoffs.push_back(std::numeric_limits<double>::infinity());
-  // Merge all remaining buckets.
-  expected.push_back(static_cast<double>(buckets - i + 1) * bucket_width *
-                     static_cast<double>(samples));
-  // Make sure that we don't merge all the buckets, making this test
-  // meaningless.
-  EXPECT_GE(cutoffs.size(), 3) << alpha_ << ", " << beta_;
-
-  D dis(alpha_, beta_);
-
-  std::vector<int32_t> counts(cutoffs.size(), 0);
-  for (int i = 0; i < samples; i++) {
-    const double x = dis(rng_);
-    auto it = std::upper_bound(cutoffs.begin(), cutoffs.end(), x);
-    counts[std::distance(cutoffs.begin(), it)]++;
-  }
-
-  // Null-hypothesis is that the distribution is beta distributed with the
-  // provided alpha, beta params (not estimated from the data).
-  const int dof = cutoffs.size() - 1;
-
-  const double chi_square = absl::random_internal::ChiSquare(
-      counts.begin(), counts.end(), expected.begin(), expected.end());
-  const bool pass =
-      (absl::random_internal::ChiSquarePValue(chi_square, dof) >= p);
-  if (!pass) {
-    for (int i = 0; i < cutoffs.size(); i++) {
-      ABSL_INTERNAL_LOG(
-          INFO, absl::StrFormat("cutoff[%d] = %f, actual count %d, expected %d",
-                                i, cutoffs[i], counts[i],
-                                static_cast<int>(expected[i])));
-    }
-
-    ABSL_INTERNAL_LOG(
-        INFO, absl::StrFormat(
-                  "Beta(%f, %f) %s %f, p = %f", alpha_, beta_,
-                  absl::random_internal::kChiSquared, chi_square,
-                  absl::random_internal::ChiSquarePValue(chi_square, dof)));
-  }
-  return pass;
-}
-
-TEST_P(BetaDistributionTest, TestSampleStatistics) {
-  static constexpr int kRuns = 20;
-  static constexpr double kPFail = 0.02;
-  const double p =
-      absl::random_internal::RequiredSuccessProbability(kPFail, kRuns);
-  static constexpr int kSampleCount = 10000;
-  static constexpr int kBucketCount = 100;
-  int failed = 0;
-  for (int i = 0; i < kRuns; ++i) {
-    if (!SingleZTestOnMeanAndVariance<absl::beta_distribution<double>>(
-            p, kSampleCount)) {
-      failed++;
-    }
-    if (!SingleChiSquaredTest<absl::beta_distribution<double>>(
-            0.005, kSampleCount, kBucketCount)) {
-      failed++;
-    }
-  }
-  // Set so that the test is not flaky at --runs_per_test=10000
-  EXPECT_LE(failed, 5);
-}
-
-std::string ParamName(
-    const ::testing::TestParamInfo<::testing::tuple<double, double>>& info) {
-  std::string name = absl::StrCat("alpha_", ::testing::get<0>(info.param),
-                                  "__beta_", ::testing::get<1>(info.param));
-  return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
-}
-
-INSTANTIATE_TEST_CASE_P(
-    TestSampleStatisticsCombinations, BetaDistributionTest,
-    ::testing::Combine(::testing::Values(0.1, 0.2, 0.9, 1.1, 2.5, 10.0, 123.4),
-                       ::testing::Values(0.1, 0.2, 0.9, 1.1, 2.5, 10.0, 123.4)),
-    ParamName);
-
-INSTANTIATE_TEST_CASE_P(
-    TestSampleStatistics_SelectedPairs, BetaDistributionTest,
-    ::testing::Values(std::make_pair(0.5, 1000), std::make_pair(1000, 0.5),
-                      std::make_pair(900, 1000), std::make_pair(10000, 20000),
-                      std::make_pair(4e5, 2e7), std::make_pair(1e7, 1e5)),
-    ParamName);
-
-// NOTE: absl::beta_distribution is not guaranteed to be stable.
-TEST(BetaDistributionTest, StabilityTest) {
-  // absl::beta_distribution stability relies on the stability of
-  // absl::random_interna::RandU64ToDouble, std::exp, std::log, std::pow,
-  // and std::sqrt.
-  //
-  // This test also depends on the stability of std::frexp.
-  using testing::ElementsAre;
-  absl::random_internal::sequence_urbg urbg({
-      0xffff00000000e6c8ull, 0xffff0000000006c8ull, 0x800003766295CFA9ull,
-      0x11C819684E734A41ull, 0x832603766295CFA9ull, 0x7fbe76c8b4395800ull,
-      0xB3472DCA7B14A94Aull, 0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull,
-      0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull, 0x00035C904C70A239ull,
-      0x00009E0BCBAADE14ull, 0x0000000000622CA7ull, 0x4864f22c059bf29eull,
-      0x247856d8b862665cull, 0xe46e86e9a1337e10ull, 0xd8c8541f3519b133ull,
-      0xffe75b52c567b9e4ull, 0xfffff732e5709c5bull, 0xff1f7f0b983532acull,
-      0x1ec2e8986d2362caull, 0xC332DDEFBE6C5AA5ull, 0x6558218568AB9702ull,
-      0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull, 0xECDD4775619F1510ull,
-      0x814c8e35fe9a961aull, 0x0c3cd59c9b638a02ull, 0xcb3bb6478a07715cull,
-      0x1224e62c978bbc7full, 0x671ef2cb04e81f6eull, 0x3c1cbd811eaf1808ull,
-      0x1bbc23cfa8fac721ull, 0xa4c2cda65e596a51ull, 0xb77216fad37adf91ull,
-      0x836d794457c08849ull, 0xe083df03475f49d7ull, 0xbc9feb512e6b0d6cull,
-      0xb12d74fdd718c8c5ull, 0x12ff09653bfbe4caull, 0x8dd03a105bc4ee7eull,
-      0x5738341045ba0d85ull, 0xf3fd722dc65ad09eull, 0xfa14fd21ea2a5705ull,
-      0xffe6ea4d6edb0c73ull, 0xD07E9EFE2BF11FB4ull, 0x95DBDA4DAE909198ull,
-      0xEAAD8E716B93D5A0ull, 0xD08ED1D0AFC725E0ull, 0x8E3C5B2F8E7594B7ull,
-      0x8FF6E2FBF2122B64ull, 0x8888B812900DF01Cull, 0x4FAD5EA0688FC31Cull,
-      0xD1CFF191B3A8C1ADull, 0x2F2F2218BE0E1777ull, 0xEA752DFE8B021FA1ull,
-  });
-
-  // Convert the real-valued result into a unit64 where we compare
-  // 5 (float) or 10 (double) decimal digits plus the base-2 exponent.
-  auto float_to_u64 = [](float d) {
-    int exp = 0;
-    auto f = std::frexp(d, &exp);
-    return (static_cast<uint64_t>(1e5 * f) * 10000) + std::abs(exp);
-  };
-  auto double_to_u64 = [](double d) {
-    int exp = 0;
-    auto f = std::frexp(d, &exp);
-    return (static_cast<uint64_t>(1e10 * f) * 10000) + std::abs(exp);
-  };
-
-  std::vector<uint64_t> output(20);
-  {
-    // Algorithm Joehnk (float)
-    absl::beta_distribution<float> dist(0.1f, 0.2f);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return float_to_u64(dist(urbg)); });
-    EXPECT_EQ(44, urbg.invocations());
-    EXPECT_THAT(output,  //
-                testing::ElementsAre(
-                    998340000, 619030004, 500000001, 999990000, 996280000,
-                    500000001, 844740004, 847210001, 999970000, 872320000,
-                    585480007, 933280000, 869080042, 647670031, 528240004,
-                    969980004, 626050008, 915930002, 833440033, 878040015));
-  }
-
-  urbg.reset();
-  {
-    // Algorithm Joehnk (double)
-    absl::beta_distribution<double> dist(0.1, 0.2);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return double_to_u64(dist(urbg)); });
-    EXPECT_EQ(44, urbg.invocations());
-    EXPECT_THAT(
-        output,  //
-        testing::ElementsAre(
-            99834713000000, 61903356870004, 50000000000001, 99999721170000,
-            99628374770000, 99999999990000, 84474397860004, 84721276240001,
-            99997407490000, 87232528120000, 58548364780007, 93328932910000,
-            86908237770042, 64767917930031, 52824581970004, 96998544140004,
-            62605946270008, 91593604380002, 83345031740033, 87804397230015));
-  }
-
-  urbg.reset();
-  {
-    // Algorithm Cheng 1
-    absl::beta_distribution<double> dist(0.9, 2.0);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return double_to_u64(dist(urbg)); });
-    EXPECT_EQ(62, urbg.invocations());
-    EXPECT_THAT(
-        output,  //
-        testing::ElementsAre(
-            62069004780001, 64433204450001, 53607416560000, 89644295430008,
-            61434586310019, 55172615890002, 62187161490000, 56433684810003,
-            80454622050005, 86418558710003, 92920514700001, 64645184680001,
-            58549183380000, 84881283650005, 71078728590002, 69949694970000,
-            73157461710001, 68592191300001, 70747623900000, 78584696930005));
-  }
-
-  urbg.reset();
-  {
-    // Algorithm Cheng 2
-    absl::beta_distribution<double> dist(1.5, 2.5);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return double_to_u64(dist(urbg)); });
-    EXPECT_EQ(54, urbg.invocations());
-    EXPECT_THAT(
-        output,  //
-        testing::ElementsAre(
-            75000029250001, 76751482860001, 53264575220000, 69193133650005,
-            78028324470013, 91573587560002, 59167523770000, 60658618560002,
-            80075870540000, 94141320460004, 63196592770003, 78883906300002,
-            96797992590001, 76907587800001, 56645167560000, 65408302280003,
-            53401156320001, 64731238570000, 83065573750001, 79788333820001));
-  }
-}
-
-// This is an implementation-specific test. If any part of the implementation
-// changes, then it is likely that this test will change as well.  Also, if
-// dependencies of the distribution change, such as RandU64ToDouble, then this
-// is also likely to change.
-TEST(BetaDistributionTest, AlgorithmBounds) {
-  {
-    absl::random_internal::sequence_urbg urbg(
-        {0x7fbe76c8b4395800ull, 0x8000000000000000ull});
-    // u=0.499, v=0.5
-    absl::beta_distribution<double> dist(1e-4, 1e-4);
-    double a = dist(urbg);
-    EXPECT_EQ(a, 2.0202860861567108529e-09);
-    EXPECT_EQ(2, urbg.invocations());
-  }
-
-  // Test that both the float & double algorithms appropriately reject the
-  // initial draw.
-  {
-    // 1/alpha = 1/beta = 2.
-    absl::beta_distribution<float> dist(0.5, 0.5);
-
-    // first two outputs are close to 1.0 - epsilon,
-    // thus:  (u ^ 2 + v ^ 2) > 1.0
-    absl::random_internal::sequence_urbg urbg(
-        {0xffff00000006e6c8ull, 0xffff00000007c7c8ull, 0x800003766295CFA9ull,
-         0x11C819684E734A41ull});
-    {
-      double y = absl::beta_distribution<double>(0.5, 0.5)(urbg);
-      EXPECT_EQ(4, urbg.invocations());
-      EXPECT_EQ(y, 0.9810668952633862) << y;
-    }
-
-    // ...and:  log(u) * a ~= log(v) * b ~= -0.02
-    // thus z ~= -0.02 + log(1 + e(~0))
-    //        ~= -0.02 + 0.69
-    // thus z > 0
-    urbg.reset();
-    {
-      float x = absl::beta_distribution<float>(0.5, 0.5)(urbg);
-      EXPECT_EQ(4, urbg.invocations());
-      EXPECT_NEAR(0.98106688261032104, x, 0.0000005) << x << "f";
-    }
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/bit_gen_ref.h b/third_party/abseil/absl/random/bit_gen_ref.h
deleted file mode 100644
index 9555460..0000000
--- a/third_party/abseil/absl/random/bit_gen_ref.h
+++ /dev/null
@@ -1,181 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: bit_gen_ref.h
-// -----------------------------------------------------------------------------
-//
-// This header defines a bit generator "reference" class, for use in interfaces
-// that take both Abseil (e.g. `absl::BitGen`) and standard library (e.g.
-// `std::mt19937`) bit generators.
-
-#ifndef ABSL_RANDOM_BIT_GEN_REF_H_
-#define ABSL_RANDOM_BIT_GEN_REF_H_
-
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/distribution_caller.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-template <typename URBG, typename = void, typename = void, typename = void>
-struct is_urbg : std::false_type {};
-
-template <typename URBG>
-struct is_urbg<
-    URBG,
-    absl::enable_if_t<std::is_same<
-        typename URBG::result_type,
-        typename std::decay<decltype((URBG::min)())>::type>::value>,
-    absl::enable_if_t<std::is_same<
-        typename URBG::result_type,
-        typename std::decay<decltype((URBG::max)())>::type>::value>,
-    absl::enable_if_t<std::is_same<
-        typename URBG::result_type,
-        typename std::decay<decltype(std::declval<URBG>()())>::type>::value>>
-    : std::true_type {};
-
-template <typename>
-struct DistributionCaller;
-class MockHelpers;
-
-}  // namespace random_internal
-
-// -----------------------------------------------------------------------------
-// absl::BitGenRef
-// -----------------------------------------------------------------------------
-//
-// `absl::BitGenRef` is a type-erasing class that provides a generator-agnostic
-// non-owning "reference" interface for use in place of any specific uniform
-// random bit generator (URBG). This class may be used for both Abseil
-// (e.g. `absl::BitGen`, `absl::InsecureBitGen`) and Standard library (e.g
-// `std::mt19937`, `std::minstd_rand`) bit generators.
-//
-// Like other reference classes, `absl::BitGenRef` does not own the
-// underlying bit generator, and the underlying instance must outlive the
-// `absl::BitGenRef`.
-//
-// `absl::BitGenRef` is particularly useful when used with an
-// `absl::MockingBitGen` to test specific paths in functions which use random
-// values.
-//
-// Example:
-//    void TakesBitGenRef(absl::BitGenRef gen) {
-//      int x = absl::Uniform<int>(gen, 0, 1000);
-//    }
-//
-class BitGenRef {
-  // SFINAE to detect whether the URBG type includes a member matching
-  // bool InvokeMock(base_internal::FastTypeIdType, void*, void*).
-  //
-  // These live inside BitGenRef so that they have friend access
-  // to MockingBitGen. (see similar methods in DistributionCaller).
-  template <template <class...> class Trait, class AlwaysVoid, class... Args>
-  struct detector : std::false_type {};
-  template <template <class...> class Trait, class... Args>
-  struct detector<Trait, absl::void_t<Trait<Args...>>, Args...>
-      : std::true_type {};
-
-  template <class T>
-  using invoke_mock_t = decltype(std::declval<T*>()->InvokeMock(
-      std::declval<base_internal::FastTypeIdType>(), std::declval<void*>(),
-      std::declval<void*>()));
-
-  template <typename T>
-  using HasInvokeMock = typename detector<invoke_mock_t, void, T>::type;
-
- public:
-  BitGenRef(const BitGenRef&) = default;
-  BitGenRef(BitGenRef&&) = default;
-  BitGenRef& operator=(const BitGenRef&) = default;
-  BitGenRef& operator=(BitGenRef&&) = default;
-
-  template <typename URBG, typename absl::enable_if_t<
-                               (!std::is_same<URBG, BitGenRef>::value &&
-                                random_internal::is_urbg<URBG>::value &&
-                                !HasInvokeMock<URBG>::value)>* = nullptr>
-  BitGenRef(URBG& gen)  // NOLINT
-      : t_erased_gen_ptr_(reinterpret_cast<uintptr_t>(&gen)),
-        mock_call_(NotAMock),
-        generate_impl_fn_(ImplFn<URBG>) {}
-
-  template <typename URBG,
-            typename absl::enable_if_t<(!std::is_same<URBG, BitGenRef>::value &&
-                                        random_internal::is_urbg<URBG>::value &&
-                                        HasInvokeMock<URBG>::value)>* = nullptr>
-  BitGenRef(URBG& gen)  // NOLINT
-      : t_erased_gen_ptr_(reinterpret_cast<uintptr_t>(&gen)),
-        mock_call_(&MockCall<URBG>),
-        generate_impl_fn_(ImplFn<URBG>) {}
-
-  using result_type = uint64_t;
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  result_type operator()() { return generate_impl_fn_(t_erased_gen_ptr_); }
-
- private:
-  using impl_fn = result_type (*)(uintptr_t);
-  using mock_call_fn = bool (*)(uintptr_t, base_internal::FastTypeIdType, void*,
-                                void*);
-
-  template <typename URBG>
-  static result_type ImplFn(uintptr_t ptr) {
-    // Ensure that the return values from operator() fill the entire
-    // range promised by result_type, min() and max().
-    absl::random_internal::FastUniformBits<result_type> fast_uniform_bits;
-    return fast_uniform_bits(*reinterpret_cast<URBG*>(ptr));
-  }
-
-  // Get a type-erased InvokeMock pointer.
-  template <typename URBG>
-  static bool MockCall(uintptr_t gen_ptr, base_internal::FastTypeIdType type,
-                       void* result, void* arg_tuple) {
-    return reinterpret_cast<URBG*>(gen_ptr)->InvokeMock(type, result,
-                                                        arg_tuple);
-  }
-  static bool NotAMock(uintptr_t, base_internal::FastTypeIdType, void*, void*) {
-    return false;
-  }
-
-  inline bool InvokeMock(base_internal::FastTypeIdType type, void* args_tuple,
-                         void* result) {
-    if (mock_call_ == NotAMock) return false;  // avoids an indirect call.
-    return mock_call_(t_erased_gen_ptr_, type, args_tuple, result);
-  }
-
-  uintptr_t t_erased_gen_ptr_;
-  mock_call_fn mock_call_;
-  impl_fn generate_impl_fn_;
-
-  template <typename>
-  friend struct ::absl::random_internal::DistributionCaller;  // for InvokeMock
-  friend class ::absl::random_internal::MockHelpers;          // for InvokeMock
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_BIT_GEN_REF_H_
diff --git a/third_party/abseil/absl/random/bit_gen_ref_test.cc b/third_party/abseil/absl/random/bit_gen_ref_test.cc
deleted file mode 100644
index 1135cf2..0000000
--- a/third_party/abseil/absl/random/bit_gen_ref_test.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#include "absl/random/bit_gen_ref.h"
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class ConstBitGen {
- public:
-  // URBG interface
-  using result_type = absl::BitGen::result_type;
-
-  static constexpr result_type(min)() { return (absl::BitGen::min)(); }
-  static constexpr result_type(max)() { return (absl::BitGen::max)(); }
-  result_type operator()() { return 1; }
-
-  // InvokeMock method
-  bool InvokeMock(base_internal::FastTypeIdType index, void*, void* result) {
-    *static_cast<int*>(result) = 42;
-    return true;
-  }
-};
-
-namespace {
-
-int FnTest(absl::BitGenRef gen_ref) { return absl::Uniform(gen_ref, 1, 7); }
-
-template <typename T>
-class BitGenRefTest : public testing::Test {};
-
-using BitGenTypes =
-    ::testing::Types<absl::BitGen, absl::InsecureBitGen, std::mt19937,
-                     std::mt19937_64, std::minstd_rand>;
-TYPED_TEST_SUITE(BitGenRefTest, BitGenTypes);
-
-TYPED_TEST(BitGenRefTest, BasicTest) {
-  TypeParam gen;
-  auto x = FnTest(gen);
-  EXPECT_NEAR(x, 4, 3);
-}
-
-TYPED_TEST(BitGenRefTest, Copyable) {
-  TypeParam gen;
-  absl::BitGenRef gen_ref(gen);
-  FnTest(gen_ref);  // Copy
-}
-
-TEST(BitGenRefTest, PassThroughEquivalence) {
-  // sequence_urbg returns 64-bit results.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<uint64_t> output(12);
-
-  {
-    absl::BitGenRef view(urbg);
-    for (auto& v : output) {
-      v = view();
-    }
-  }
-
-  std::vector<uint64_t> expected(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  EXPECT_THAT(output, testing::Eq(expected));
-}
-
-TEST(BitGenRefTest, MockingBitGenBaseOverrides) {
-  ConstBitGen const_gen;
-  EXPECT_EQ(FnTest(const_gen), 42);
-
-  absl::BitGenRef gen_ref(const_gen);
-  EXPECT_EQ(FnTest(gen_ref), 42);  // Copy
-}
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/discrete_distribution.cc b/third_party/abseil/absl/random/discrete_distribution.cc
deleted file mode 100644
index 081acce..0000000
--- a/third_party/abseil/absl/random/discrete_distribution.cc
+++ /dev/null
@@ -1,98 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/discrete_distribution.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Initializes the distribution table for Walker's Aliasing algorithm, described
-// in Knuth, Vol 2. as well as in https://en.wikipedia.org/wiki/Alias_method
-std::vector<std::pair<double, size_t>> InitDiscreteDistribution(
-    std::vector<double>* probabilities) {
-  // The empty-case should already be handled by the constructor.
-  assert(probabilities);
-  assert(!probabilities->empty());
-
-  // Step 1. Normalize the input probabilities to 1.0.
-  double sum = std::accumulate(std::begin(*probabilities),
-                               std::end(*probabilities), 0.0);
-  if (std::fabs(sum - 1.0) > 1e-6) {
-    // Scale `probabilities` only when the sum is too far from 1.0.  Scaling
-    // unconditionally will alter the probabilities slightly.
-    for (double& item : *probabilities) {
-      item = item / sum;
-    }
-  }
-
-  // Step 2. At this point `probabilities` is set to the conditional
-  // probabilities of each element which sum to 1.0, to within reasonable error.
-  // These values are used to construct the proportional probability tables for
-  // the selection phases of Walker's Aliasing algorithm.
-  //
-  // To construct the table, pick an element which is under-full (i.e., an
-  // element for which `(*probabilities)[i] < 1.0/n`), and pair it with an
-  // element which is over-full (i.e., an element for which
-  // `(*probabilities)[i] > 1.0/n`). The smaller value can always be retired.
-  // The larger may still be greater than 1.0/n, or may now be less than 1.0/n,
-  // and put back onto the appropriate collection.
-  const size_t n = probabilities->size();
-  std::vector<std::pair<double, size_t>> q;
-  q.reserve(n);
-
-  std::vector<size_t> over;
-  std::vector<size_t> under;
-  size_t idx = 0;
-  for (const double item : *probabilities) {
-    assert(item >= 0);
-    const double v = item * n;
-    q.emplace_back(v, 0);
-    if (v < 1.0) {
-      under.push_back(idx++);
-    } else {
-      over.push_back(idx++);
-    }
-  }
-  while (!over.empty() && !under.empty()) {
-    auto lo = under.back();
-    under.pop_back();
-    auto hi = over.back();
-    over.pop_back();
-
-    q[lo].second = hi;
-    const double r = q[hi].first - (1.0 - q[lo].first);
-    q[hi].first = r;
-    if (r < 1.0) {
-      under.push_back(hi);
-    } else {
-      over.push_back(hi);
-    }
-  }
-
-  // Due to rounding errors, there may be un-paired elements in either
-  // collection; these should all be values near 1.0.  For these values, set `q`
-  // to 1.0 and set the alternate to the identity.
-  for (auto i : over) {
-    q[i] = {1.0, i};
-  }
-  for (auto i : under) {
-    q[i] = {1.0, i};
-  }
-  return q;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/discrete_distribution.h b/third_party/abseil/absl/random/discrete_distribution.h
deleted file mode 100644
index 171aa11..0000000
--- a/third_party/abseil/absl/random/discrete_distribution.h
+++ /dev/null
@@ -1,247 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_DISCRETE_DISTRIBUTION_H_
-#define ABSL_RANDOM_DISCRETE_DISTRIBUTION_H_
-
-#include <cassert>
-#include <cmath>
-#include <istream>
-#include <limits>
-#include <numeric>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "absl/random/bernoulli_distribution.h"
-#include "absl/random/internal/iostream_state_saver.h"
-#include "absl/random/uniform_int_distribution.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::discrete_distribution
-//
-// A discrete distribution produces random integers i, where 0 <= i < n
-// distributed according to the discrete probability function:
-//
-//     P(i|p0,...,pn−1)=pi
-//
-// This class is an implementation of discrete_distribution (see
-// [rand.dist.samp.discrete]).
-//
-// The algorithm used is Walker's Aliasing algorithm, described in Knuth, Vol 2.
-// absl::discrete_distribution takes O(N) time to precompute the probabilities
-// (where N is the number of possible outcomes in the distribution) at
-// construction, and then takes O(1) time for each variate generation.  Many
-// other implementations also take O(N) time to construct an ordered sequence of
-// partial sums, plus O(log N) time per variate to binary search.
-//
-template <typename IntType = int>
-class discrete_distribution {
- public:
-  using result_type = IntType;
-
-  class param_type {
-   public:
-    using distribution_type = discrete_distribution;
-
-    param_type() { init(); }
-
-    template <typename InputIterator>
-    explicit param_type(InputIterator begin, InputIterator end)
-        : p_(begin, end) {
-      init();
-    }
-
-    explicit param_type(std::initializer_list<double> weights) : p_(weights) {
-      init();
-    }
-
-    template <class UnaryOperation>
-    explicit param_type(size_t nw, double xmin, double xmax,
-                        UnaryOperation fw) {
-      if (nw > 0) {
-        p_.reserve(nw);
-        double delta = (xmax - xmin) / static_cast<double>(nw);
-        assert(delta > 0);
-        double t = delta * 0.5;
-        for (size_t i = 0; i < nw; ++i) {
-          p_.push_back(fw(xmin + i * delta + t));
-        }
-      }
-      init();
-    }
-
-    const std::vector<double>& probabilities() const { return p_; }
-    size_t n() const { return p_.size() - 1; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.probabilities() == b.probabilities();
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class discrete_distribution;
-
-    void init();
-
-    std::vector<double> p_;                     // normalized probabilities
-    std::vector<std::pair<double, size_t>> q_;  // (acceptance, alternate) pairs
-
-    static_assert(std::is_integral<result_type>::value,
-                  "Class-template absl::discrete_distribution<> must be "
-                  "parameterized using an integral type.");
-  };
-
-  discrete_distribution() : param_() {}
-
-  explicit discrete_distribution(const param_type& p) : param_(p) {}
-
-  template <typename InputIterator>
-  explicit discrete_distribution(InputIterator begin, InputIterator end)
-      : param_(begin, end) {}
-
-  explicit discrete_distribution(std::initializer_list<double> weights)
-      : param_(weights) {}
-
-  template <class UnaryOperation>
-  explicit discrete_distribution(size_t nw, double xmin, double xmax,
-                                 UnaryOperation fw)
-      : param_(nw, xmin, xmax, std::move(fw)) {}
-
-  void reset() {}
-
-  // generating functions
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  const param_type& param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  result_type(min)() const { return 0; }
-  result_type(max)() const {
-    return static_cast<result_type>(param_.n());
-  }  // inclusive
-
-  // NOTE [rand.dist.sample.discrete] returns a std::vector<double> not a
-  // const std::vector<double>&.
-  const std::vector<double>& probabilities() const {
-    return param_.probabilities();
-  }
-
-  friend bool operator==(const discrete_distribution& a,
-                         const discrete_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const discrete_distribution& a,
-                         const discrete_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  param_type param_;
-};
-
-// --------------------------------------------------------------------------
-// Implementation details only below
-// --------------------------------------------------------------------------
-
-namespace random_internal {
-
-// Using the vector `*probabilities`, whose values are the weights or
-// probabilities of an element being selected, constructs the proportional
-// probabilities used by the discrete distribution.  `*probabilities` will be
-// scaled, if necessary, so that its entries sum to a value sufficiently close
-// to 1.0.
-std::vector<std::pair<double, size_t>> InitDiscreteDistribution(
-    std::vector<double>* probabilities);
-
-}  // namespace random_internal
-
-template <typename IntType>
-void discrete_distribution<IntType>::param_type::init() {
-  if (p_.empty()) {
-    p_.push_back(1.0);
-    q_.emplace_back(1.0, 0);
-  } else {
-    assert(n() <= (std::numeric_limits<IntType>::max)());
-    q_ = random_internal::InitDiscreteDistribution(&p_);
-  }
-}
-
-template <typename IntType>
-template <typename URBG>
-typename discrete_distribution<IntType>::result_type
-discrete_distribution<IntType>::operator()(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  const auto idx = absl::uniform_int_distribution<result_type>(0, p.n())(g);
-  const auto& q = p.q_[idx];
-  const bool selected = absl::bernoulli_distribution(q.first)(g);
-  return selected ? idx : static_cast<result_type>(q.second);
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const discrete_distribution<IntType>& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  const auto& probabilities = x.param().probabilities();
-  os << probabilities.size();
-
-  os.precision(random_internal::stream_precision_helper<double>::kPrecision);
-  for (const auto& p : probabilities) {
-    os << os.fill() << p;
-  }
-  return os;
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    discrete_distribution<IntType>& x) {    // NOLINT(runtime/references)
-  using param_type = typename discrete_distribution<IntType>::param_type;
-  auto saver = random_internal::make_istream_state_saver(is);
-
-  size_t n;
-  std::vector<double> p;
-
-  is >> n;
-  if (is.fail()) return is;
-  if (n > 0) {
-    p.reserve(n);
-    for (IntType i = 0; i < n && !is.fail(); ++i) {
-      auto tmp = random_internal::read_floating_point<double>(is);
-      if (is.fail()) return is;
-      p.push_back(tmp);
-    }
-  }
-  x.param(param_type(p.begin(), p.end()));
-  return is;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_DISCRETE_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/discrete_distribution_test.cc b/third_party/abseil/absl/random/discrete_distribution_test.cc
deleted file mode 100644
index 6d00700..0000000
--- a/third_party/abseil/absl/random/discrete_distribution_test.cc
+++ /dev/null
@@ -1,250 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/discrete_distribution.h"
-
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <numeric>
-#include <random>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-template <typename IntType>
-class DiscreteDistributionTypeTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<int8_t, uint8_t, int16_t, uint16_t, int32_t,
-                                  uint32_t, int64_t, uint64_t>;
-TYPED_TEST_SUITE(DiscreteDistributionTypeTest, IntTypes);
-
-TYPED_TEST(DiscreteDistributionTypeTest, ParamSerializeTest) {
-  using param_type =
-      typename absl::discrete_distribution<TypeParam>::param_type;
-
-  absl::discrete_distribution<TypeParam> empty;
-  EXPECT_THAT(empty.probabilities(), testing::ElementsAre(1.0));
-
-  absl::discrete_distribution<TypeParam> before({1.0, 2.0, 1.0});
-
-  // Validate that the probabilities sum to 1.0. We picked values which
-  // can be represented exactly to avoid floating-point roundoff error.
-  double s = 0;
-  for (const auto& x : before.probabilities()) {
-    s += x;
-  }
-  EXPECT_EQ(s, 1.0);
-  EXPECT_THAT(before.probabilities(), testing::ElementsAre(0.25, 0.5, 0.25));
-
-  // Validate the same data via an initializer list.
-  {
-    std::vector<double> data({1.0, 2.0, 1.0});
-
-    absl::discrete_distribution<TypeParam> via_param{
-        param_type(std::begin(data), std::end(data))};
-
-    EXPECT_EQ(via_param, before);
-  }
-
-  std::stringstream ss;
-  ss << before;
-  absl::discrete_distribution<TypeParam> after;
-
-  EXPECT_NE(before, after);
-
-  ss >> after;
-
-  EXPECT_EQ(before, after);
-}
-
-TYPED_TEST(DiscreteDistributionTypeTest, Constructor) {
-  auto fn = [](double x) { return x; };
-  {
-    absl::discrete_distribution<int> unary(0, 1.0, 9.0, fn);
-    EXPECT_THAT(unary.probabilities(), testing::ElementsAre(1.0));
-  }
-
-  {
-    absl::discrete_distribution<int> unary(2, 1.0, 9.0, fn);
-    // => fn(1.0 + 0 * 4 + 2) => 3
-    // => fn(1.0 + 1 * 4 + 2) => 7
-    EXPECT_THAT(unary.probabilities(), testing::ElementsAre(0.3, 0.7));
-  }
-}
-
-TEST(DiscreteDistributionTest, InitDiscreteDistribution) {
-  using testing::Pair;
-
-  {
-    std::vector<double> p({1.0, 2.0, 3.0});
-    std::vector<std::pair<double, size_t>> q =
-        absl::random_internal::InitDiscreteDistribution(&p);
-
-    EXPECT_THAT(p, testing::ElementsAre(1 / 6.0, 2 / 6.0, 3 / 6.0));
-
-    // Each bucket is p=1/3, so bucket 0 will send half it's traffic
-    // to bucket 2, while the rest will retain all of their traffic.
-    EXPECT_THAT(q, testing::ElementsAre(Pair(0.5, 2),  //
-                                        Pair(1.0, 1),  //
-                                        Pair(1.0, 2)));
-  }
-
-  {
-    std::vector<double> p({1.0, 2.0, 3.0, 5.0, 2.0});
-
-    std::vector<std::pair<double, size_t>> q =
-        absl::random_internal::InitDiscreteDistribution(&p);
-
-    EXPECT_THAT(p, testing::ElementsAre(1 / 13.0, 2 / 13.0, 3 / 13.0, 5 / 13.0,
-                                        2 / 13.0));
-
-    // A more complex bucketing solution: Each bucket has p=0.2
-    // So buckets 0, 1, 4 will send their alternate traffic elsewhere, which
-    // happens to be bucket 3.
-    // However, summing up that alternate traffic gives bucket 3 too much
-    // traffic, so it will send some traffic to bucket 2.
-    constexpr double b0 = 1.0 / 13.0 / 0.2;
-    constexpr double b1 = 2.0 / 13.0 / 0.2;
-    constexpr double b3 = (5.0 / 13.0 / 0.2) - ((1 - b0) + (1 - b1) + (1 - b1));
-
-    EXPECT_THAT(q, testing::ElementsAre(Pair(b0, 3),   //
-                                        Pair(b1, 3),   //
-                                        Pair(1.0, 2),  //
-                                        Pair(b3, 2),   //
-                                        Pair(b1, 3)));
-  }
-}
-
-TEST(DiscreteDistributionTest, ChiSquaredTest50) {
-  using absl::random_internal::kChiSquared;
-
-  constexpr size_t kTrials = 10000;
-  constexpr int kBuckets = 50;  // inclusive, so actally +1
-
-  // 1-in-100000 threshold, but remember, there are about 8 tests
-  // in this file. And the test could fail for other reasons.
-  // Empirically validated with --runs_per_test=10000.
-  const int kThreshold =
-      absl::random_internal::ChiSquareValue(kBuckets, 0.99999);
-
-  std::vector<double> weights(kBuckets, 0);
-  std::iota(std::begin(weights), std::end(weights), 1);
-  absl::discrete_distribution<int> dist(std::begin(weights), std::end(weights));
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng(0x2B7E151628AED2A6);
-
-  std::vector<int32_t> counts(kBuckets, 0);
-  for (size_t i = 0; i < kTrials; i++) {
-    auto x = dist(rng);
-    counts[x]++;
-  }
-
-  // Scale weights.
-  double sum = 0;
-  for (double x : weights) {
-    sum += x;
-  }
-  for (double& x : weights) {
-    x = kTrials * (x / sum);
-  }
-
-  double chi_square =
-      absl::random_internal::ChiSquare(std::begin(counts), std::end(counts),
-                                       std::begin(weights), std::end(weights));
-
-  if (chi_square > kThreshold) {
-    double p_value =
-        absl::random_internal::ChiSquarePValue(chi_square, kBuckets);
-
-    // Chi-squared test failed. Output does not appear to be uniform.
-    std::string msg;
-    for (size_t i = 0; i < counts.size(); i++) {
-      absl::StrAppend(&msg, i, ": ", counts[i], " vs ", weights[i], "\n");
-    }
-    absl::StrAppend(&msg, kChiSquared, " p-value ", p_value, "\n");
-    absl::StrAppend(&msg, "High ", kChiSquared, " value: ", chi_square, " > ",
-                    kThreshold);
-    ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-    FAIL() << msg;
-  }
-}
-
-TEST(DiscreteDistributionTest, StabilityTest) {
-  // absl::discrete_distribution stabilitiy relies on
-  // absl::uniform_int_distribution and absl::bernoulli_distribution.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(6);
-
-  {
-    absl::discrete_distribution<int32_t> dist({1.0, 2.0, 3.0, 5.0, 2.0});
-    EXPECT_EQ(0, dist.min());
-    EXPECT_EQ(4, dist.max());
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-    EXPECT_EQ(12, urbg.invocations());
-  }
-
-  // With 12 calls to urbg, each call into discrete_distribution consumes
-  // precisely 2 values: one for the uniform call, and a second for the
-  // bernoulli.
-  //
-  // Given the alt mapping: 0=>3, 1=>3, 2=>2, 3=>2, 4=>3, we can
-  //
-  // uniform:      443210143131
-  // bernoulli: b0 000011100101
-  // bernoulli: b1 001111101101
-  // bernoulli: b2 111111111111
-  // bernoulli: b3 001111101111
-  // bernoulli: b4 001111101101
-  // ...
-  EXPECT_THAT(output, testing::ElementsAre(3, 3, 1, 3, 3, 3));
-
-  {
-    urbg.reset();
-    absl::discrete_distribution<int64_t> dist({1.0, 2.0, 3.0, 5.0, 2.0});
-    EXPECT_EQ(0, dist.min());
-    EXPECT_EQ(4, dist.max());
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-    EXPECT_EQ(12, urbg.invocations());
-  }
-  EXPECT_THAT(output, testing::ElementsAre(3, 3, 0, 3, 0, 4));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/distributions.h b/third_party/abseil/absl/random/distributions.h
deleted file mode 100644
index 31c7969..0000000
--- a/third_party/abseil/absl/random/distributions.h
+++ /dev/null
@@ -1,452 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: distributions.h
-// -----------------------------------------------------------------------------
-//
-// This header defines functions representing distributions, which you use in
-// combination with an Abseil random bit generator to produce random values
-// according to the rules of that distribution.
-//
-// The Abseil random library defines the following distributions within this
-// file:
-//
-//   * `absl::Uniform` for uniform (constant) distributions having constant
-//     probability
-//   * `absl::Bernoulli` for discrete distributions having exactly two outcomes
-//   * `absl::Beta` for continuous distributions parameterized through two
-//     free parameters
-//   * `absl::Exponential` for discrete distributions of events occurring
-//     continuously and independently at a constant average rate
-//   * `absl::Gaussian` (also known as "normal distributions") for continuous
-//     distributions using an associated quadratic function
-//   * `absl::LogUniform` for continuous uniform distributions where the log
-//     to the given base of all values is uniform
-//   * `absl::Poisson` for discrete probability distributions that express the
-//     probability of a given number of events occurring within a fixed interval
-//   * `absl::Zipf` for discrete probability distributions commonly used for
-//     modelling of rare events
-//
-// Prefer use of these distribution function classes over manual construction of
-// your own distribution classes, as it allows library maintainers greater
-// flexibility to change the underlying implementation in the future.
-
-#ifndef ABSL_RANDOM_DISTRIBUTIONS_H_
-#define ABSL_RANDOM_DISTRIBUTIONS_H_
-
-#include <algorithm>
-#include <cmath>
-#include <limits>
-#include <random>
-#include <type_traits>
-
-#include "absl/base/internal/inline_variable.h"
-#include "absl/random/bernoulli_distribution.h"
-#include "absl/random/beta_distribution.h"
-#include "absl/random/exponential_distribution.h"
-#include "absl/random/gaussian_distribution.h"
-#include "absl/random/internal/distribution_caller.h"  // IWYU pragma: export
-#include "absl/random/internal/uniform_helper.h"  // IWYU pragma: export
-#include "absl/random/log_uniform_int_distribution.h"
-#include "absl/random/poisson_distribution.h"
-#include "absl/random/uniform_int_distribution.h"
-#include "absl/random/uniform_real_distribution.h"
-#include "absl/random/zipf_distribution.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-ABSL_INTERNAL_INLINE_CONSTEXPR(IntervalClosedClosedTag, IntervalClosedClosed,
-                               {});
-ABSL_INTERNAL_INLINE_CONSTEXPR(IntervalClosedClosedTag, IntervalClosed, {});
-ABSL_INTERNAL_INLINE_CONSTEXPR(IntervalClosedOpenTag, IntervalClosedOpen, {});
-ABSL_INTERNAL_INLINE_CONSTEXPR(IntervalOpenOpenTag, IntervalOpenOpen, {});
-ABSL_INTERNAL_INLINE_CONSTEXPR(IntervalOpenOpenTag, IntervalOpen, {});
-ABSL_INTERNAL_INLINE_CONSTEXPR(IntervalOpenClosedTag, IntervalOpenClosed, {});
-
-// -----------------------------------------------------------------------------
-// absl::Uniform<T>(tag, bitgen, lo, hi)
-// -----------------------------------------------------------------------------
-//
-// `absl::Uniform()` produces random values of type `T` uniformly distributed in
-// a defined interval {lo, hi}. The interval `tag` defines the type of interval
-// which should be one of the following possible values:
-//
-//   * `absl::IntervalOpenOpen`
-//   * `absl::IntervalOpenClosed`
-//   * `absl::IntervalClosedOpen`
-//   * `absl::IntervalClosedClosed`
-//
-// where "open" refers to an exclusive value (excluded) from the output, while
-// "closed" refers to an inclusive value (included) from the output.
-//
-// In the absence of an explicit return type `T`, `absl::Uniform()` will deduce
-// the return type based on the provided endpoint arguments {A lo, B hi}.
-// Given these endpoints, one of {A, B} will be chosen as the return type, if
-// a type can be implicitly converted into the other in a lossless way. The
-// lack of any such implicit conversion between {A, B} will produce a
-// compile-time error
-//
-// See https://en.wikipedia.org/wiki/Uniform_distribution_(continuous)
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//
-//   // Produce a random float value between 0.0 and 1.0, inclusive
-//   auto x = absl::Uniform(absl::IntervalClosedClosed, bitgen, 0.0f, 1.0f);
-//
-//   // The most common interval of `absl::IntervalClosedOpen` is available by
-//   // default:
-//
-//   auto x = absl::Uniform(bitgen, 0.0f, 1.0f);
-//
-//   // Return-types are typically inferred from the arguments, however callers
-//   // can optionally provide an explicit return-type to the template.
-//
-//   auto x = absl::Uniform<float>(bitgen, 0, 1);
-//
-template <typename R = void, typename TagType, typename URBG>
-typename absl::enable_if_t<!std::is_same<R, void>::value, R>  //
-Uniform(TagType tag,
-        URBG&& urbg,  // NOLINT(runtime/references)
-        R lo, R hi) {
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = random_internal::UniformDistributionWrapper<R>;
-
-  auto a = random_internal::uniform_lower_bound(tag, lo, hi);
-  auto b = random_internal::uniform_upper_bound(tag, lo, hi);
-  if (!random_internal::is_uniform_range_valid(a, b)) return lo;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, tag, lo, hi);
-}
-
-// absl::Uniform<T>(bitgen, lo, hi)
-//
-// Overload of `Uniform()` using the default closed-open interval of [lo, hi),
-// and returning values of type `T`
-template <typename R = void, typename URBG>
-typename absl::enable_if_t<!std::is_same<R, void>::value, R>  //
-Uniform(URBG&& urbg,  // NOLINT(runtime/references)
-        R lo, R hi) {
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = random_internal::UniformDistributionWrapper<R>;
-  constexpr auto tag = absl::IntervalClosedOpen;
-
-  auto a = random_internal::uniform_lower_bound(tag, lo, hi);
-  auto b = random_internal::uniform_upper_bound(tag, lo, hi);
-  if (!random_internal::is_uniform_range_valid(a, b)) return lo;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, lo, hi);
-}
-
-// absl::Uniform(tag, bitgen, lo, hi)
-//
-// Overload of `Uniform()` using different (but compatible) lo, hi types. Note
-// that a compile-error will result if the return type cannot be deduced
-// correctly from the passed types.
-template <typename R = void, typename TagType, typename URBG, typename A,
-          typename B>
-typename absl::enable_if_t<std::is_same<R, void>::value,
-                           random_internal::uniform_inferred_return_t<A, B>>
-Uniform(TagType tag,
-        URBG&& urbg,  // NOLINT(runtime/references)
-        A lo, B hi) {
-  using gen_t = absl::decay_t<URBG>;
-  using return_t = typename random_internal::uniform_inferred_return_t<A, B>;
-  using distribution_t = random_internal::UniformDistributionWrapper<return_t>;
-
-  auto a = random_internal::uniform_lower_bound<return_t>(tag, lo, hi);
-  auto b = random_internal::uniform_upper_bound<return_t>(tag, lo, hi);
-  if (!random_internal::is_uniform_range_valid(a, b)) return lo;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, tag, static_cast<return_t>(lo),
-                                static_cast<return_t>(hi));
-}
-
-// absl::Uniform(bitgen, lo, hi)
-//
-// Overload of `Uniform()` using different (but compatible) lo, hi types and the
-// default closed-open interval of [lo, hi). Note that a compile-error will
-// result if the return type cannot be deduced correctly from the passed types.
-template <typename R = void, typename URBG, typename A, typename B>
-typename absl::enable_if_t<std::is_same<R, void>::value,
-                           random_internal::uniform_inferred_return_t<A, B>>
-Uniform(URBG&& urbg,  // NOLINT(runtime/references)
-        A lo, B hi) {
-  using gen_t = absl::decay_t<URBG>;
-  using return_t = typename random_internal::uniform_inferred_return_t<A, B>;
-  using distribution_t = random_internal::UniformDistributionWrapper<return_t>;
-
-  constexpr auto tag = absl::IntervalClosedOpen;
-  auto a = random_internal::uniform_lower_bound<return_t>(tag, lo, hi);
-  auto b = random_internal::uniform_upper_bound<return_t>(tag, lo, hi);
-  if (!random_internal::is_uniform_range_valid(a, b)) return lo;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, static_cast<return_t>(lo),
-                                static_cast<return_t>(hi));
-}
-
-// absl::Uniform<unsigned T>(bitgen)
-//
-// Overload of Uniform() using the minimum and maximum values of a given type
-// `T` (which must be unsigned), returning a value of type `unsigned T`
-template <typename R, typename URBG>
-typename absl::enable_if_t<!std::is_signed<R>::value, R>  //
-Uniform(URBG&& urbg) {  // NOLINT(runtime/references)
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = random_internal::UniformDistributionWrapper<R>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg);
-}
-
-// -----------------------------------------------------------------------------
-// absl::Bernoulli(bitgen, p)
-// -----------------------------------------------------------------------------
-//
-// `absl::Bernoulli` produces a random boolean value, with probability `p`
-// (where 0.0 <= p <= 1.0) equaling `true`.
-//
-// Prefer `absl::Bernoulli` to produce boolean values over other alternatives
-// such as comparing an `absl::Uniform()` value to a specific output.
-//
-// See https://en.wikipedia.org/wiki/Bernoulli_distribution
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   if (absl::Bernoulli(bitgen, 1.0/3721.0)) {
-//     std::cout << "Asteroid field navigation successful.";
-//   }
-//
-template <typename URBG>
-bool Bernoulli(URBG&& urbg,  // NOLINT(runtime/references)
-               double p) {
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = absl::bernoulli_distribution;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, p);
-}
-
-// -----------------------------------------------------------------------------
-// absl::Beta<T>(bitgen, alpha, beta)
-// -----------------------------------------------------------------------------
-//
-// `absl::Beta` produces a floating point number distributed in the closed
-// interval [0,1] and parameterized by two values `alpha` and `beta` as per a
-// Beta distribution. `T` must be a floating point type, but may be inferred
-// from the types of `alpha` and `beta`.
-//
-// See https://en.wikipedia.org/wiki/Beta_distribution.
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   double sample = absl::Beta(bitgen, 3.0, 2.0);
-//
-template <typename RealType, typename URBG>
-RealType Beta(URBG&& urbg,  // NOLINT(runtime/references)
-              RealType alpha, RealType beta) {
-  static_assert(
-      std::is_floating_point<RealType>::value,
-      "Template-argument 'RealType' must be a floating-point type, in "
-      "absl::Beta<RealType, URBG>(...)");
-
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = typename absl::beta_distribution<RealType>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, alpha, beta);
-}
-
-// -----------------------------------------------------------------------------
-// absl::Exponential<T>(bitgen, lambda = 1)
-// -----------------------------------------------------------------------------
-//
-// `absl::Exponential` produces a floating point number representing the
-// distance (time) between two consecutive events in a point process of events
-// occurring continuously and independently at a constant average rate. `T` must
-// be a floating point type, but may be inferred from the type of `lambda`.
-//
-// See https://en.wikipedia.org/wiki/Exponential_distribution.
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   double call_length = absl::Exponential(bitgen, 7.0);
-//
-template <typename RealType, typename URBG>
-RealType Exponential(URBG&& urbg,  // NOLINT(runtime/references)
-                     RealType lambda = 1) {
-  static_assert(
-      std::is_floating_point<RealType>::value,
-      "Template-argument 'RealType' must be a floating-point type, in "
-      "absl::Exponential<RealType, URBG>(...)");
-
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = typename absl::exponential_distribution<RealType>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, lambda);
-}
-
-// -----------------------------------------------------------------------------
-// absl::Gaussian<T>(bitgen, mean = 0, stddev = 1)
-// -----------------------------------------------------------------------------
-//
-// `absl::Gaussian` produces a floating point number selected from the Gaussian
-// (ie. "Normal") distribution. `T` must be a floating point type, but may be
-// inferred from the types of `mean` and `stddev`.
-//
-// See https://en.wikipedia.org/wiki/Normal_distribution
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   double giraffe_height = absl::Gaussian(bitgen, 16.3, 3.3);
-//
-template <typename RealType, typename URBG>
-RealType Gaussian(URBG&& urbg,  // NOLINT(runtime/references)
-                  RealType mean = 0, RealType stddev = 1) {
-  static_assert(
-      std::is_floating_point<RealType>::value,
-      "Template-argument 'RealType' must be a floating-point type, in "
-      "absl::Gaussian<RealType, URBG>(...)");
-
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = typename absl::gaussian_distribution<RealType>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, mean, stddev);
-}
-
-// -----------------------------------------------------------------------------
-// absl::LogUniform<T>(bitgen, lo, hi, base = 2)
-// -----------------------------------------------------------------------------
-//
-// `absl::LogUniform` produces random values distributed where the log to a
-// given base of all values is uniform in a closed interval [lo, hi]. `T` must
-// be an integral type, but may be inferred from the types of `lo` and `hi`.
-//
-// I.e., `LogUniform(0, n, b)` is uniformly distributed across buckets
-// [0], [1, b-1], [b, b^2-1] .. [b^(k-1), (b^k)-1] .. [b^floor(log(n, b)), n]
-// and is uniformly distributed within each bucket.
-//
-// The resulting probability density is inversely related to bucket size, though
-// values in the final bucket may be more likely than previous values. (In the
-// extreme case where n = b^i the final value will be tied with zero as the most
-// probable result.
-//
-// If `lo` is nonzero then this distribution is shifted to the desired interval,
-// so LogUniform(lo, hi, b) is equivalent to LogUniform(0, hi-lo, b)+lo.
-//
-// See http://ecolego.facilia.se/ecolego/show/Log-Uniform%20Distribution
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   int v = absl::LogUniform(bitgen, 0, 1000);
-//
-template <typename IntType, typename URBG>
-IntType LogUniform(URBG&& urbg,  // NOLINT(runtime/references)
-                   IntType lo, IntType hi, IntType base = 2) {
-  static_assert(std::is_integral<IntType>::value,
-                "Template-argument 'IntType' must be an integral type, in "
-                "absl::LogUniform<IntType, URBG>(...)");
-
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = typename absl::log_uniform_int_distribution<IntType>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, lo, hi, base);
-}
-
-// -----------------------------------------------------------------------------
-// absl::Poisson<T>(bitgen, mean = 1)
-// -----------------------------------------------------------------------------
-//
-// `absl::Poisson` produces discrete probabilities for a given number of events
-// occurring within a fixed interval within the closed interval [0, max]. `T`
-// must be an integral type.
-//
-// See https://en.wikipedia.org/wiki/Poisson_distribution
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   int requests_per_minute = absl::Poisson<int>(bitgen, 3.2);
-//
-template <typename IntType, typename URBG>
-IntType Poisson(URBG&& urbg,  // NOLINT(runtime/references)
-                double mean = 1.0) {
-  static_assert(std::is_integral<IntType>::value,
-                "Template-argument 'IntType' must be an integral type, in "
-                "absl::Poisson<IntType, URBG>(...)");
-
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = typename absl::poisson_distribution<IntType>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, mean);
-}
-
-// -----------------------------------------------------------------------------
-// absl::Zipf<T>(bitgen, hi = max, q = 2, v = 1)
-// -----------------------------------------------------------------------------
-//
-// `absl::Zipf` produces discrete probabilities commonly used for modelling of
-// rare events over the closed interval [0, hi]. The parameters `v` and `q`
-// determine the skew of the distribution. `T`  must be an integral type, but
-// may be inferred from the type of `hi`.
-//
-// See http://mathworld.wolfram.com/ZipfDistribution.html
-//
-// Example:
-//
-//   absl::BitGen bitgen;
-//   ...
-//   int term_rank = absl::Zipf<int>(bitgen);
-//
-template <typename IntType, typename URBG>
-IntType Zipf(URBG&& urbg,  // NOLINT(runtime/references)
-             IntType hi = (std::numeric_limits<IntType>::max)(), double q = 2.0,
-             double v = 1.0) {
-  static_assert(std::is_integral<IntType>::value,
-                "Template-argument 'IntType' must be an integral type, in "
-                "absl::Zipf<IntType, URBG>(...)");
-
-  using gen_t = absl::decay_t<URBG>;
-  using distribution_t = typename absl::zipf_distribution<IntType>;
-
-  return random_internal::DistributionCaller<gen_t>::template Call<
-      distribution_t>(&urbg, hi, q, v);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_DISTRIBUTIONS_H_
diff --git a/third_party/abseil/absl/random/distributions_test.cc b/third_party/abseil/absl/random/distributions_test.cc
deleted file mode 100644
index 5866a07..0000000
--- a/third_party/abseil/absl/random/distributions_test.cc
+++ /dev/null
@@ -1,455 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/distributions.h"
-
-#include <cmath>
-#include <cstdint>
-#include <random>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/random.h"
-
-namespace {
-
-constexpr int kSize = 400000;
-
-class RandomDistributionsTest : public testing::Test {};
-
-
-struct Invalid {};
-
-template <typename A, typename B>
-auto InferredUniformReturnT(int)
-    -> decltype(absl::Uniform(std::declval<absl::InsecureBitGen&>(),
-                              std::declval<A>(), std::declval<B>()));
-
-template <typename, typename>
-Invalid InferredUniformReturnT(...);
-
-template <typename TagType, typename A, typename B>
-auto InferredTaggedUniformReturnT(int)
-    -> decltype(absl::Uniform(std::declval<TagType>(),
-                              std::declval<absl::InsecureBitGen&>(),
-                              std::declval<A>(), std::declval<B>()));
-
-template <typename, typename, typename>
-Invalid InferredTaggedUniformReturnT(...);
-
-// Given types <A, B, Expect>, CheckArgsInferType() verifies that
-//
-//   absl::Uniform(gen, A{}, B{})
-//
-// returns the type "Expect".
-//
-// This interface can also be used to assert that a given absl::Uniform()
-// overload does not exist / will not compile. Given types <A, B>, the
-// expression
-//
-//   decltype(absl::Uniform(..., std::declval<A>(), std::declval<B>()))
-//
-// will not compile, leaving the definition of InferredUniformReturnT<A, B> to
-// resolve (via SFINAE) to the overload which returns type "Invalid". This
-// allows tests to assert that an invocation such as
-//
-//   absl::Uniform(gen, 1.23f, std::numeric_limits<int>::max() - 1)
-//
-// should not compile, since neither type, float nor int, can precisely
-// represent both endpoint-values. Writing:
-//
-//   CheckArgsInferType<float, int, Invalid>()
-//
-// will assert that this overload does not exist.
-template <typename A, typename B, typename Expect>
-void CheckArgsInferType() {
-  static_assert(
-      absl::conjunction<
-          std::is_same<Expect, decltype(InferredUniformReturnT<A, B>(0))>,
-          std::is_same<Expect,
-                       decltype(InferredUniformReturnT<B, A>(0))>>::value,
-      "");
-  static_assert(
-      absl::conjunction<
-          std::is_same<Expect, decltype(InferredTaggedUniformReturnT<
-                                        absl::IntervalOpenOpenTag, A, B>(0))>,
-          std::is_same<Expect,
-                       decltype(InferredTaggedUniformReturnT<
-                                absl::IntervalOpenOpenTag, B, A>(0))>>::value,
-      "");
-}
-
-template <typename A, typename B, typename ExplicitRet>
-auto ExplicitUniformReturnT(int) -> decltype(
-    absl::Uniform<ExplicitRet>(*std::declval<absl::InsecureBitGen*>(),
-                               std::declval<A>(), std::declval<B>()));
-
-template <typename, typename, typename ExplicitRet>
-Invalid ExplicitUniformReturnT(...);
-
-template <typename TagType, typename A, typename B, typename ExplicitRet>
-auto ExplicitTaggedUniformReturnT(int) -> decltype(absl::Uniform<ExplicitRet>(
-    std::declval<TagType>(), *std::declval<absl::InsecureBitGen*>(),
-    std::declval<A>(), std::declval<B>()));
-
-template <typename, typename, typename, typename ExplicitRet>
-Invalid ExplicitTaggedUniformReturnT(...);
-
-// Given types <A, B, Expect>, CheckArgsReturnExpectedType() verifies that
-//
-//   absl::Uniform<Expect>(gen, A{}, B{})
-//
-// returns the type "Expect", and that the function-overload has the signature
-//
-//   Expect(URBG&, Expect, Expect)
-template <typename A, typename B, typename Expect>
-void CheckArgsReturnExpectedType() {
-  static_assert(
-      absl::conjunction<
-          std::is_same<Expect,
-                       decltype(ExplicitUniformReturnT<A, B, Expect>(0))>,
-          std::is_same<Expect, decltype(ExplicitUniformReturnT<B, A, Expect>(
-                                   0))>>::value,
-      "");
-  static_assert(
-      absl::conjunction<
-          std::is_same<Expect,
-                       decltype(ExplicitTaggedUniformReturnT<
-                                absl::IntervalOpenOpenTag, A, B, Expect>(0))>,
-          std::is_same<Expect, decltype(ExplicitTaggedUniformReturnT<
-                                        absl::IntervalOpenOpenTag, B, A,
-                                        Expect>(0))>>::value,
-      "");
-}
-
-TEST_F(RandomDistributionsTest, UniformTypeInference) {
-  // Infers common types.
-  CheckArgsInferType<uint16_t, uint16_t, uint16_t>();
-  CheckArgsInferType<uint32_t, uint32_t, uint32_t>();
-  CheckArgsInferType<uint64_t, uint64_t, uint64_t>();
-  CheckArgsInferType<int16_t, int16_t, int16_t>();
-  CheckArgsInferType<int32_t, int32_t, int32_t>();
-  CheckArgsInferType<int64_t, int64_t, int64_t>();
-  CheckArgsInferType<float, float, float>();
-  CheckArgsInferType<double, double, double>();
-
-  // Explicitly-specified return-values override inferences.
-  CheckArgsReturnExpectedType<int16_t, int16_t, int32_t>();
-  CheckArgsReturnExpectedType<uint16_t, uint16_t, int32_t>();
-  CheckArgsReturnExpectedType<int16_t, int16_t, int64_t>();
-  CheckArgsReturnExpectedType<int16_t, int32_t, int64_t>();
-  CheckArgsReturnExpectedType<int16_t, int32_t, double>();
-  CheckArgsReturnExpectedType<float, float, double>();
-  CheckArgsReturnExpectedType<int, int, int16_t>();
-
-  // Properly promotes uint16_t.
-  CheckArgsInferType<uint16_t, uint32_t, uint32_t>();
-  CheckArgsInferType<uint16_t, uint64_t, uint64_t>();
-  CheckArgsInferType<uint16_t, int32_t, int32_t>();
-  CheckArgsInferType<uint16_t, int64_t, int64_t>();
-  CheckArgsInferType<uint16_t, float, float>();
-  CheckArgsInferType<uint16_t, double, double>();
-
-  // Properly promotes int16_t.
-  CheckArgsInferType<int16_t, int32_t, int32_t>();
-  CheckArgsInferType<int16_t, int64_t, int64_t>();
-  CheckArgsInferType<int16_t, float, float>();
-  CheckArgsInferType<int16_t, double, double>();
-
-  // Invalid (u)int16_t-pairings do not compile.
-  // See "CheckArgsInferType" comments above, for how this is achieved.
-  CheckArgsInferType<uint16_t, int16_t, Invalid>();
-  CheckArgsInferType<int16_t, uint32_t, Invalid>();
-  CheckArgsInferType<int16_t, uint64_t, Invalid>();
-
-  // Properly promotes uint32_t.
-  CheckArgsInferType<uint32_t, uint64_t, uint64_t>();
-  CheckArgsInferType<uint32_t, int64_t, int64_t>();
-  CheckArgsInferType<uint32_t, double, double>();
-
-  // Properly promotes int32_t.
-  CheckArgsInferType<int32_t, int64_t, int64_t>();
-  CheckArgsInferType<int32_t, double, double>();
-
-  // Invalid (u)int32_t-pairings do not compile.
-  CheckArgsInferType<uint32_t, int32_t, Invalid>();
-  CheckArgsInferType<int32_t, uint64_t, Invalid>();
-  CheckArgsInferType<int32_t, float, Invalid>();
-  CheckArgsInferType<uint32_t, float, Invalid>();
-
-  // Invalid (u)int64_t-pairings do not compile.
-  CheckArgsInferType<uint64_t, int64_t, Invalid>();
-  CheckArgsInferType<int64_t, float, Invalid>();
-  CheckArgsInferType<int64_t, double, Invalid>();
-
-  // Properly promotes float.
-  CheckArgsInferType<float, double, double>();
-}
-
-TEST_F(RandomDistributionsTest, UniformExamples) {
-  // Examples.
-  absl::InsecureBitGen gen;
-  EXPECT_NE(1, absl::Uniform(gen, static_cast<uint16_t>(0), 1.0f));
-  EXPECT_NE(1, absl::Uniform(gen, 0, 1.0));
-  EXPECT_NE(1, absl::Uniform(absl::IntervalOpenOpen, gen,
-                             static_cast<uint16_t>(0), 1.0f));
-  EXPECT_NE(1, absl::Uniform(absl::IntervalOpenOpen, gen, 0, 1.0));
-  EXPECT_NE(1, absl::Uniform(absl::IntervalOpenOpen, gen, -1, 1.0));
-  EXPECT_NE(1, absl::Uniform<double>(absl::IntervalOpenOpen, gen, -1, 1));
-  EXPECT_NE(1, absl::Uniform<float>(absl::IntervalOpenOpen, gen, 0, 1));
-  EXPECT_NE(1, absl::Uniform<float>(gen, 0, 1));
-}
-
-TEST_F(RandomDistributionsTest, UniformNoBounds) {
-  absl::InsecureBitGen gen;
-
-  absl::Uniform<uint8_t>(gen);
-  absl::Uniform<uint16_t>(gen);
-  absl::Uniform<uint32_t>(gen);
-  absl::Uniform<uint64_t>(gen);
-}
-
-TEST_F(RandomDistributionsTest, UniformNonsenseRanges) {
-  // The ranges used in this test are undefined behavior.
-  // The results are arbitrary and subject to future changes.
-  absl::InsecureBitGen gen;
-
-  // <uint>
-  EXPECT_EQ(0, absl::Uniform<uint64_t>(gen, 0, 0));
-  EXPECT_EQ(1, absl::Uniform<uint64_t>(gen, 1, 0));
-  EXPECT_EQ(0, absl::Uniform<uint64_t>(absl::IntervalOpenOpen, gen, 0, 0));
-  EXPECT_EQ(1, absl::Uniform<uint64_t>(absl::IntervalOpenOpen, gen, 1, 0));
-
-  constexpr auto m = (std::numeric_limits<uint64_t>::max)();
-
-  EXPECT_EQ(m, absl::Uniform(gen, m, m));
-  EXPECT_EQ(m, absl::Uniform(gen, m, m - 1));
-  EXPECT_EQ(m - 1, absl::Uniform(gen, m - 1, m));
-  EXPECT_EQ(m, absl::Uniform(absl::IntervalOpenOpen, gen, m, m));
-  EXPECT_EQ(m, absl::Uniform(absl::IntervalOpenOpen, gen, m, m - 1));
-  EXPECT_EQ(m - 1, absl::Uniform(absl::IntervalOpenOpen, gen, m - 1, m));
-
-  // <int>
-  EXPECT_EQ(0, absl::Uniform<int64_t>(gen, 0, 0));
-  EXPECT_EQ(1, absl::Uniform<int64_t>(gen, 1, 0));
-  EXPECT_EQ(0, absl::Uniform<int64_t>(absl::IntervalOpenOpen, gen, 0, 0));
-  EXPECT_EQ(1, absl::Uniform<int64_t>(absl::IntervalOpenOpen, gen, 1, 0));
-
-  constexpr auto l = (std::numeric_limits<int64_t>::min)();
-  constexpr auto r = (std::numeric_limits<int64_t>::max)();
-
-  EXPECT_EQ(l, absl::Uniform(gen, l, l));
-  EXPECT_EQ(r, absl::Uniform(gen, r, r));
-  EXPECT_EQ(r, absl::Uniform(gen, r, r - 1));
-  EXPECT_EQ(r - 1, absl::Uniform(gen, r - 1, r));
-  EXPECT_EQ(l, absl::Uniform(absl::IntervalOpenOpen, gen, l, l));
-  EXPECT_EQ(r, absl::Uniform(absl::IntervalOpenOpen, gen, r, r));
-  EXPECT_EQ(r, absl::Uniform(absl::IntervalOpenOpen, gen, r, r - 1));
-  EXPECT_EQ(r - 1, absl::Uniform(absl::IntervalOpenOpen, gen, r - 1, r));
-
-  // <double>
-  const double e = std::nextafter(1.0, 2.0);  // 1 + epsilon
-  const double f = std::nextafter(1.0, 0.0);  // 1 - epsilon
-  const double g = std::numeric_limits<double>::denorm_min();
-
-  EXPECT_EQ(1.0, absl::Uniform(gen, 1.0, e));
-  EXPECT_EQ(1.0, absl::Uniform(gen, 1.0, f));
-  EXPECT_EQ(0.0, absl::Uniform(gen, 0.0, g));
-
-  EXPECT_EQ(e, absl::Uniform(absl::IntervalOpenOpen, gen, 1.0, e));
-  EXPECT_EQ(f, absl::Uniform(absl::IntervalOpenOpen, gen, 1.0, f));
-  EXPECT_EQ(g, absl::Uniform(absl::IntervalOpenOpen, gen, 0.0, g));
-}
-
-// TODO(lar): Validate properties of non-default interval-semantics.
-TEST_F(RandomDistributionsTest, UniformReal) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Uniform(gen, 0, 1.0);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(0.5, moments.mean, 0.02);
-  EXPECT_NEAR(1 / 12.0, moments.variance, 0.02);
-  EXPECT_NEAR(0.0, moments.skewness, 0.02);
-  EXPECT_NEAR(9 / 5.0, moments.kurtosis, 0.02);
-}
-
-TEST_F(RandomDistributionsTest, UniformInt) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    const int64_t kMax = 1000000000000ll;
-    int64_t j = absl::Uniform(absl::IntervalClosedClosed, gen, 0, kMax);
-    // convert to double.
-    values[i] = static_cast<double>(j) / static_cast<double>(kMax);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(0.5, moments.mean, 0.02);
-  EXPECT_NEAR(1 / 12.0, moments.variance, 0.02);
-  EXPECT_NEAR(0.0, moments.skewness, 0.02);
-  EXPECT_NEAR(9 / 5.0, moments.kurtosis, 0.02);
-
-  /*
-  // NOTE: These are not supported by absl::Uniform, which is specialized
-  // on integer and real valued types.
-
-  enum E { E0, E1 };    // enum
-  enum S : int { S0, S1 };    // signed enum
-  enum U : unsigned int { U0, U1 };  // unsigned enum
-
-  absl::Uniform(gen, E0, E1);
-  absl::Uniform(gen, S0, S1);
-  absl::Uniform(gen, U0, U1);
-  */
-}
-
-TEST_F(RandomDistributionsTest, Exponential) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Exponential<double>(gen);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(1.0, moments.mean, 0.02);
-  EXPECT_NEAR(1.0, moments.variance, 0.025);
-  EXPECT_NEAR(2.0, moments.skewness, 0.1);
-  EXPECT_LT(5.0, moments.kurtosis);
-}
-
-TEST_F(RandomDistributionsTest, PoissonDefault) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Poisson<int64_t>(gen);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(1.0, moments.mean, 0.02);
-  EXPECT_NEAR(1.0, moments.variance, 0.02);
-  EXPECT_NEAR(1.0, moments.skewness, 0.025);
-  EXPECT_LT(2.0, moments.kurtosis);
-}
-
-TEST_F(RandomDistributionsTest, PoissonLarge) {
-  constexpr double kMean = 100000000.0;
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Poisson<int64_t>(gen, kMean);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(kMean, moments.mean, kMean * 0.015);
-  EXPECT_NEAR(kMean, moments.variance, kMean * 0.015);
-  EXPECT_NEAR(std::sqrt(kMean), moments.skewness, kMean * 0.02);
-  EXPECT_LT(2.0, moments.kurtosis);
-}
-
-TEST_F(RandomDistributionsTest, Bernoulli) {
-  constexpr double kP = 0.5151515151;
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Bernoulli(gen, kP);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(kP, moments.mean, 0.01);
-}
-
-TEST_F(RandomDistributionsTest, Beta) {
-  constexpr double kAlpha = 2.0;
-  constexpr double kBeta = 3.0;
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Beta(gen, kAlpha, kBeta);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(0.4, moments.mean, 0.01);
-}
-
-TEST_F(RandomDistributionsTest, Zipf) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Zipf<int64_t>(gen, 100);
-  }
-
-  // The mean of a zipf distribution is: H(N, s-1) / H(N,s).
-  // Given the parameter v = 1, this gives the following function:
-  // (Hn(100, 1) - Hn(1,1)) / (Hn(100,2) - Hn(1,2)) = 6.5944
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(6.5944, moments.mean, 2000) << moments;
-}
-
-TEST_F(RandomDistributionsTest, Gaussian) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::Gaussian<double>(gen);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(0.0, moments.mean, 0.02);
-  EXPECT_NEAR(1.0, moments.variance, 0.04);
-  EXPECT_NEAR(0, moments.skewness, 0.2);
-  EXPECT_NEAR(3.0, moments.kurtosis, 0.5);
-}
-
-TEST_F(RandomDistributionsTest, LogUniform) {
-  std::vector<double> values(kSize);
-
-  absl::InsecureBitGen gen;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = absl::LogUniform<int64_t>(gen, 0, (1 << 10) - 1);
-  }
-
-  // The mean is the sum of the fractional means of the uniform distributions:
-  // [0..0][1..1][2..3][4..7][8..15][16..31][32..63]
-  // [64..127][128..255][256..511][512..1023]
-  const double mean = (0 + 1 + 1 + 2 + 3 + 4 + 7 + 8 + 15 + 16 + 31 + 32 + 63 +
-                       64 + 127 + 128 + 255 + 256 + 511 + 512 + 1023) /
-                      (2.0 * 11.0);
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(mean, moments.mean, 2) << moments;
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/examples_test.cc b/third_party/abseil/absl/random/examples_test.cc
deleted file mode 100644
index 1dcb514..0000000
--- a/third_party/abseil/absl/random/examples_test.cc
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cinttypes>
-#include <random>
-#include <sstream>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/random/random.h"
-
-template <typename T>
-void Use(T) {}
-
-TEST(Examples, Basic) {
-  absl::BitGen gen;
-  std::vector<int> objs = {10, 20, 30, 40, 50};
-
-  // Choose an element from a set.
-  auto elem = objs[absl::Uniform(gen, 0u, objs.size())];
-  Use(elem);
-
-  // Generate a uniform value between 1 and 6.
-  auto dice_roll = absl::Uniform<int>(absl::IntervalClosedClosed, gen, 1, 6);
-  Use(dice_roll);
-
-  // Generate a random byte.
-  auto byte = absl::Uniform<uint8_t>(gen);
-  Use(byte);
-
-  // Generate a fractional value from [0f, 1f).
-  auto fraction = absl::Uniform<float>(gen, 0, 1);
-  Use(fraction);
-
-  // Toss a fair coin; 50/50 probability.
-  bool coin_toss = absl::Bernoulli(gen, 0.5);
-  Use(coin_toss);
-
-  // Select a file size between 1k and 10MB, biased towards smaller file sizes.
-  auto file_size = absl::LogUniform<size_t>(gen, 1000, 10 * 1000 * 1000);
-  Use(file_size);
-
-  // Randomize (shuffle) a collection.
-  std::shuffle(std::begin(objs), std::end(objs), gen);
-}
-
-TEST(Examples, CreateingCorrelatedVariateSequences) {
-  // Unexpected PRNG correlation is often a source of bugs,
-  // so when using absl::BitGen it must be an intentional choice.
-  // NOTE: All of these only exhibit process-level stability.
-
-  // Create a correlated sequence from system entropy.
-  {
-    auto my_seed = absl::MakeSeedSeq();
-
-    absl::BitGen gen_1(my_seed);
-    absl::BitGen gen_2(my_seed);  // Produces same variates as gen_1.
-
-    EXPECT_EQ(absl::Bernoulli(gen_1, 0.5), absl::Bernoulli(gen_2, 0.5));
-    EXPECT_EQ(absl::Uniform<uint32_t>(gen_1), absl::Uniform<uint32_t>(gen_2));
-  }
-
-  // Create a correlated sequence from an existing URBG.
-  {
-    absl::BitGen gen;
-
-    auto my_seed = absl::CreateSeedSeqFrom(&gen);
-    absl::BitGen gen_1(my_seed);
-    absl::BitGen gen_2(my_seed);
-
-    EXPECT_EQ(absl::Bernoulli(gen_1, 0.5), absl::Bernoulli(gen_2, 0.5));
-    EXPECT_EQ(absl::Uniform<uint32_t>(gen_1), absl::Uniform<uint32_t>(gen_2));
-  }
-
-  // An alternate construction which uses user-supplied data
-  // instead of a random seed.
-  {
-    const char kData[] = "A simple seed string";
-    std::seed_seq my_seed(std::begin(kData), std::end(kData));
-
-    absl::BitGen gen_1(my_seed);
-    absl::BitGen gen_2(my_seed);
-
-    EXPECT_EQ(absl::Bernoulli(gen_1, 0.5), absl::Bernoulli(gen_2, 0.5));
-    EXPECT_EQ(absl::Uniform<uint32_t>(gen_1), absl::Uniform<uint32_t>(gen_2));
-  }
-}
-
diff --git a/third_party/abseil/absl/random/exponential_distribution.h b/third_party/abseil/absl/random/exponential_distribution.h
deleted file mode 100644
index b5caf8a..0000000
--- a/third_party/abseil/absl/random/exponential_distribution.h
+++ /dev/null
@@ -1,165 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_EXPONENTIAL_DISTRIBUTION_H_
-#define ABSL_RANDOM_EXPONENTIAL_DISTRIBUTION_H_
-
-#include <cassert>
-#include <cmath>
-#include <istream>
-#include <limits>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/generate_real.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::exponential_distribution:
-// Generates a number conforming to an exponential distribution and is
-// equivalent to the standard [rand.dist.pois.exp] distribution.
-template <typename RealType = double>
-class exponential_distribution {
- public:
-  using result_type = RealType;
-
-  class param_type {
-   public:
-    using distribution_type = exponential_distribution;
-
-    explicit param_type(result_type lambda = 1) : lambda_(lambda) {
-      assert(lambda > 0);
-      neg_inv_lambda_ = -result_type(1) / lambda_;
-    }
-
-    result_type lambda() const { return lambda_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.lambda_ == b.lambda_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class exponential_distribution;
-
-    result_type lambda_;
-    result_type neg_inv_lambda_;
-
-    static_assert(
-        std::is_floating_point<RealType>::value,
-        "Class-template absl::exponential_distribution<> must be parameterized "
-        "using a floating-point type.");
-  };
-
-  exponential_distribution() : exponential_distribution(1) {}
-
-  explicit exponential_distribution(result_type lambda) : param_(lambda) {}
-
-  explicit exponential_distribution(const param_type& p) : param_(p) {}
-
-  void reset() {}
-
-  // Generating functions
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  param_type param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  result_type(min)() const { return 0; }
-  result_type(max)() const {
-    return std::numeric_limits<result_type>::infinity();
-  }
-
-  result_type lambda() const { return param_.lambda(); }
-
-  friend bool operator==(const exponential_distribution& a,
-                         const exponential_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const exponential_distribution& a,
-                         const exponential_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  param_type param_;
-  random_internal::FastUniformBits<uint64_t> fast_u64_;
-};
-
-// --------------------------------------------------------------------------
-// Implementation details follow
-// --------------------------------------------------------------------------
-
-template <typename RealType>
-template <typename URBG>
-typename exponential_distribution<RealType>::result_type
-exponential_distribution<RealType>::operator()(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  using random_internal::GenerateNegativeTag;
-  using random_internal::GenerateRealFromBits;
-  using real_type =
-      absl::conditional_t<std::is_same<RealType, float>::value, float, double>;
-
-  const result_type u = GenerateRealFromBits<real_type, GenerateNegativeTag,
-                                             false>(fast_u64_(g));  // U(-1, 0)
-
-  // log1p(-x) is mathematically equivalent to log(1 - x) but has more
-  // accuracy for x near zero.
-  return p.neg_inv_lambda_ * std::log1p(u);
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const exponential_distribution<RealType>& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<RealType>::kPrecision);
-  os << x.lambda();
-  return os;
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,    // NOLINT(runtime/references)
-    exponential_distribution<RealType>& x) {  // NOLINT(runtime/references)
-  using result_type = typename exponential_distribution<RealType>::result_type;
-  using param_type = typename exponential_distribution<RealType>::param_type;
-  result_type lambda;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  lambda = random_internal::read_floating_point<result_type>(is);
-  if (!is.fail()) {
-    x.param(param_type(lambda));
-  }
-  return is;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_EXPONENTIAL_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/exponential_distribution_test.cc b/third_party/abseil/absl/random/exponential_distribution_test.cc
deleted file mode 100644
index 5a8afde..0000000
--- a/third_party/abseil/absl/random/exponential_distribution_test.cc
+++ /dev/null
@@ -1,426 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/exponential_distribution.h"
-
-#include <algorithm>
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <limits>
-#include <random>
-#include <sstream>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_replace.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-using absl::random_internal::kChiSquared;
-
-template <typename RealType>
-class ExponentialDistributionTypedTest : public ::testing::Test {};
-
-using RealTypes = ::testing::Types<float, double, long double>;
-TYPED_TEST_CASE(ExponentialDistributionTypedTest, RealTypes);
-
-TYPED_TEST(ExponentialDistributionTypedTest, SerializeTest) {
-  using param_type =
-      typename absl::exponential_distribution<TypeParam>::param_type;
-
-  const TypeParam kParams[] = {
-      // Cases around 1.
-      1,                                           //
-      std::nextafter(TypeParam(1), TypeParam(0)),  // 1 - epsilon
-      std::nextafter(TypeParam(1), TypeParam(2)),  // 1 + epsilon
-      // Typical cases.
-      TypeParam(1e-8), TypeParam(1e-4), TypeParam(1), TypeParam(2),
-      TypeParam(1e4), TypeParam(1e8), TypeParam(1e20), TypeParam(2.5),
-      // Boundary cases.
-      std::numeric_limits<TypeParam>::max(),
-      std::numeric_limits<TypeParam>::epsilon(),
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(1)),           // min + epsilon
-      std::numeric_limits<TypeParam>::min(),  // smallest normal
-      // There are some errors dealing with denorms on apple platforms.
-      std::numeric_limits<TypeParam>::denorm_min(),  // smallest denorm
-      std::numeric_limits<TypeParam>::min() / 2,     // denorm
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(0)),  // denorm_max
-  };
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-
-  for (const TypeParam lambda : kParams) {
-    // Some values may be invalid; skip those.
-    if (!std::isfinite(lambda)) continue;
-    ABSL_ASSERT(lambda > 0);
-
-    const param_type param(lambda);
-
-    absl::exponential_distribution<TypeParam> before(lambda);
-    EXPECT_EQ(before.lambda(), param.lambda());
-
-    {
-      absl::exponential_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-      EXPECT_EQ(via_param.param(), before.param());
-    }
-
-    // Smoke test.
-    auto sample_min = before.max();
-    auto sample_max = before.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = before(gen);
-      EXPECT_GE(sample, before.min()) << before;
-      EXPECT_LE(sample, before.max()) << before;
-      if (sample > sample_max) sample_max = sample;
-      if (sample < sample_min) sample_min = sample;
-    }
-    if (!std::is_same<TypeParam, long double>::value) {
-      ABSL_INTERNAL_LOG(INFO,
-                        absl::StrFormat("Range {%f}: %f, %f, lambda=%f", lambda,
-                                        sample_min, sample_max, lambda));
-    }
-
-    std::stringstream ss;
-    ss << before;
-
-    if (!std::isfinite(lambda)) {
-      // Streams do not deserialize inf/nan correctly.
-      continue;
-    }
-    // Validate stream serialization.
-    absl::exponential_distribution<TypeParam> after(34.56f);
-
-    EXPECT_NE(before.lambda(), after.lambda());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-#if defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \
-    defined(__ppc__) || defined(__PPC__)
-    if (std::is_same<TypeParam, long double>::value) {
-      // Roundtripping floating point values requires sufficient precision to
-      // reconstruct the exact value. It turns out that long double has some
-      // errors doing this on ppc, particularly for values
-      // near {1.0 +/- epsilon}.
-      if (lambda <= std::numeric_limits<double>::max() &&
-          lambda >= std::numeric_limits<double>::lowest()) {
-        EXPECT_EQ(static_cast<double>(before.lambda()),
-                  static_cast<double>(after.lambda()))
-            << ss.str();
-      }
-      continue;
-    }
-#endif
-
-    EXPECT_EQ(before.lambda(), after.lambda())  //
-        << ss.str() << " "                      //
-        << (ss.good() ? "good " : "")           //
-        << (ss.bad() ? "bad " : "")             //
-        << (ss.eof() ? "eof " : "")             //
-        << (ss.fail() ? "fail " : "");
-  }
-}
-
-// http://www.itl.nist.gov/div898/handbook/eda/section3/eda3667.htm
-
-class ExponentialModel {
- public:
-  explicit ExponentialModel(double lambda)
-      : lambda_(lambda), beta_(1.0 / lambda) {}
-
-  double lambda() const { return lambda_; }
-
-  double mean() const { return beta_; }
-  double variance() const { return beta_ * beta_; }
-  double stddev() const { return std::sqrt(variance()); }
-  double skew() const { return 2; }
-  double kurtosis() const { return 6.0; }
-
-  double CDF(double x) { return 1.0 - std::exp(-lambda_ * x); }
-
-  // The inverse CDF, or PercentPoint function of the distribution
-  double InverseCDF(double p) {
-    ABSL_ASSERT(p >= 0.0);
-    ABSL_ASSERT(p < 1.0);
-    return -beta_ * std::log(1.0 - p);
-  }
-
- private:
-  const double lambda_;
-  const double beta_;
-};
-
-struct Param {
-  double lambda;
-  double p_fail;
-  int trials;
-};
-
-class ExponentialDistributionTests : public testing::TestWithParam<Param>,
-                                     public ExponentialModel {
- public:
-  ExponentialDistributionTests() : ExponentialModel(GetParam().lambda) {}
-
-  // SingleZTest provides a basic z-squared test of the mean vs. expected
-  // mean for data generated by the poisson distribution.
-  template <typename D>
-  bool SingleZTest(const double p, const size_t samples);
-
-  // SingleChiSquaredTest provides a basic chi-squared test of the normal
-  // distribution.
-  template <typename D>
-  double SingleChiSquaredTest();
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
-};
-
-template <typename D>
-bool ExponentialDistributionTests::SingleZTest(const double p,
-                                               const size_t samples) {
-  D dis(lambda());
-
-  std::vector<double> data;
-  data.reserve(samples);
-  for (size_t i = 0; i < samples; i++) {
-    const double x = dis(rng_);
-    data.push_back(x);
-  }
-
-  const auto m = absl::random_internal::ComputeDistributionMoments(data);
-  const double max_err = absl::random_internal::MaxErrorTolerance(p);
-  const double z = absl::random_internal::ZScore(mean(), m);
-  const bool pass = absl::random_internal::Near("z", z, 0.0, max_err);
-
-  if (!pass) {
-    ABSL_INTERNAL_LOG(
-        INFO, absl::StrFormat("p=%f max_err=%f\n"
-                              " lambda=%f\n"
-                              " mean=%f vs. %f\n"
-                              " stddev=%f vs. %f\n"
-                              " skewness=%f vs. %f\n"
-                              " kurtosis=%f vs. %f\n"
-                              " z=%f vs. 0",
-                              p, max_err, lambda(), m.mean, mean(),
-                              std::sqrt(m.variance), stddev(), m.skewness,
-                              skew(), m.kurtosis, kurtosis(), z));
-  }
-  return pass;
-}
-
-template <typename D>
-double ExponentialDistributionTests::SingleChiSquaredTest() {
-  const size_t kSamples = 10000;
-  const int kBuckets = 50;
-
-  // The InverseCDF is the percent point function of the distribution, and can
-  // be used to assign buckets roughly uniformly.
-  std::vector<double> cutoffs;
-  const double kInc = 1.0 / static_cast<double>(kBuckets);
-  for (double p = kInc; p < 1.0; p += kInc) {
-    cutoffs.push_back(InverseCDF(p));
-  }
-  if (cutoffs.back() != std::numeric_limits<double>::infinity()) {
-    cutoffs.push_back(std::numeric_limits<double>::infinity());
-  }
-
-  D dis(lambda());
-
-  std::vector<int32_t> counts(cutoffs.size(), 0);
-  for (int j = 0; j < kSamples; j++) {
-    const double x = dis(rng_);
-    auto it = std::upper_bound(cutoffs.begin(), cutoffs.end(), x);
-    counts[std::distance(cutoffs.begin(), it)]++;
-  }
-
-  // Null-hypothesis is that the distribution is exponentially distributed
-  // with the provided lambda (not estimated from the data).
-  const int dof = static_cast<int>(counts.size()) - 1;
-
-  // Our threshold for logging is 1-in-50.
-  const double threshold = absl::random_internal::ChiSquareValue(dof, 0.98);
-
-  const double expected =
-      static_cast<double>(kSamples) / static_cast<double>(counts.size());
-
-  double chi_square = absl::random_internal::ChiSquareWithExpected(
-      std::begin(counts), std::end(counts), expected);
-  double p = absl::random_internal::ChiSquarePValue(chi_square, dof);
-
-  if (chi_square > threshold) {
-    for (int i = 0; i < cutoffs.size(); i++) {
-      ABSL_INTERNAL_LOG(
-          INFO, absl::StrFormat("%d : (%f) = %d", i, cutoffs[i], counts[i]));
-    }
-
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrCat("lambda ", lambda(), "\n",     //
-                                   " expected ", expected, "\n",  //
-                                   kChiSquared, " ", chi_square, " (", p, ")\n",
-                                   kChiSquared, " @ 0.98 = ", threshold));
-  }
-  return p;
-}
-
-TEST_P(ExponentialDistributionTests, ZTest) {
-  const size_t kSamples = 10000;
-  const auto& param = GetParam();
-  const int expected_failures =
-      std::max(1, static_cast<int>(std::ceil(param.trials * param.p_fail)));
-  const double p = absl::random_internal::RequiredSuccessProbability(
-      param.p_fail, param.trials);
-
-  int failures = 0;
-  for (int i = 0; i < param.trials; i++) {
-    failures += SingleZTest<absl::exponential_distribution<double>>(p, kSamples)
-                    ? 0
-                    : 1;
-  }
-  EXPECT_LE(failures, expected_failures);
-}
-
-TEST_P(ExponentialDistributionTests, ChiSquaredTest) {
-  const int kTrials = 20;
-  int failures = 0;
-
-  for (int i = 0; i < kTrials; i++) {
-    double p_value =
-        SingleChiSquaredTest<absl::exponential_distribution<double>>();
-    if (p_value < 0.005) {  // 1/200
-      failures++;
-    }
-  }
-
-  // There is a 0.10% chance of producing at least one failure, so raise the
-  // failure threshold high enough to allow for a flake rate < 10,000.
-  EXPECT_LE(failures, 4);
-}
-
-std::vector<Param> GenParams() {
-  return {
-      Param{1.0, 0.02, 100},
-      Param{2.5, 0.02, 100},
-      Param{10, 0.02, 100},
-      // large
-      Param{1e4, 0.02, 100},
-      Param{1e9, 0.02, 100},
-      // small
-      Param{0.1, 0.02, 100},
-      Param{1e-3, 0.02, 100},
-      Param{1e-5, 0.02, 100},
-  };
-}
-
-std::string ParamName(const ::testing::TestParamInfo<Param>& info) {
-  const auto& p = info.param;
-  std::string name = absl::StrCat("lambda_", absl::SixDigits(p.lambda));
-  return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
-}
-
-INSTANTIATE_TEST_CASE_P(All, ExponentialDistributionTests,
-                        ::testing::ValuesIn(GenParams()), ParamName);
-
-// NOTE: absl::exponential_distribution is not guaranteed to be stable.
-TEST(ExponentialDistributionTest, StabilityTest) {
-  // absl::exponential_distribution stability relies on std::log1p and
-  // absl::uniform_real_distribution.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(14);
-
-  {
-    absl::exponential_distribution<double> dist;
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return static_cast<int>(10000.0 * dist(urbg)); });
-
-    EXPECT_EQ(14, urbg.invocations());
-    EXPECT_THAT(output,
-                testing::ElementsAre(0, 71913, 14375, 5039, 1835, 861, 25936,
-                                     804, 126, 12337, 17984, 27002, 0, 71913));
-  }
-
-  urbg.reset();
-  {
-    absl::exponential_distribution<float> dist;
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return static_cast<int>(10000.0f * dist(urbg)); });
-
-    EXPECT_EQ(14, urbg.invocations());
-    EXPECT_THAT(output,
-                testing::ElementsAre(0, 71913, 14375, 5039, 1835, 861, 25936,
-                                     804, 126, 12337, 17984, 27002, 0, 71913));
-  }
-}
-
-TEST(ExponentialDistributionTest, AlgorithmBounds) {
-  // Relies on absl::uniform_real_distribution, so some of these comments
-  // reference that.
-  absl::exponential_distribution<double> dist;
-
-  {
-    // This returns the smallest value >0 from absl::uniform_real_distribution.
-    absl::random_internal::sequence_urbg urbg({0x0000000000000001ull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 5.42101086242752217004e-20);
-  }
-
-  {
-    // This returns a value very near 0.5 from absl::uniform_real_distribution.
-    absl::random_internal::sequence_urbg urbg({0x7fffffffffffffefull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 0.693147180559945175204);
-  }
-
-  {
-    // This returns the largest value <1 from absl::uniform_real_distribution.
-    // WolframAlpha: ~39.1439465808987766283058547296341915292187253
-    absl::random_internal::sequence_urbg urbg({0xFFFFFFFFFFFFFFeFull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 36.7368005696771007251);
-  }
-  {
-    // This *ALSO* returns the largest value <1.
-    absl::random_internal::sequence_urbg urbg({0xFFFFFFFFFFFFFFFFull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 36.7368005696771007251);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/gaussian_distribution.cc b/third_party/abseil/absl/random/gaussian_distribution.cc
deleted file mode 100644
index c7a72cb..0000000
--- a/third_party/abseil/absl/random/gaussian_distribution.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-// BEGIN GENERATED CODE; DO NOT EDIT
-// clang-format off
-
-#include "absl/random/gaussian_distribution.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-const gaussian_distribution_base::Tables
-    gaussian_distribution_base::zg_ = {
-    {3.7130862467425505, 3.442619855899000214, 3.223084984581141565,
-     3.083228858216868318, 2.978696252647779819, 2.894344007021528942,
-     2.82312535054891045, 2.761169372387176857, 2.706113573121819549,
-     2.656406411261359679, 2.610972248431847387, 2.56903362592493778,
-     2.530009672388827457, 2.493454522095372106, 2.459018177411830486,
-     2.426420645533749809, 2.395434278011062457, 2.365871370117638595,
-     2.337575241339236776, 2.310413683698762988, 2.284274059677471769,
-     2.25905957386919809, 2.234686395590979036, 2.21108140887870297,
-     2.188180432076048731, 2.165926793748921497, 2.144270182360394905,
-     2.123165708673976138, 2.102573135189237608, 2.082456237992015957,
-     2.062782274508307978, 2.043521536655067194, 2.02464697337738464,
-     2.006133869963471206, 1.987959574127619033, 1.970103260854325633,
-     1.952545729553555764, 1.935269228296621957, 1.918257300864508963,
-     1.901494653105150423, 1.884967035707758143, 1.868661140994487768,
-     1.852564511728090002, 1.836665460258444904, 1.820952996596124418,
-     1.805416764219227366, 1.790046982599857506, 1.77483439558606837,
-     1.759770224899592339, 1.744846128113799244, 1.730054160563729182,
-     1.71538674071366648, 1.700836618569915748, 1.686396846779167014,
-     1.6720607540975998, 1.657821920954023254, 1.643674156862867441,
-     1.629611479470633562, 1.615628095043159629, 1.601718380221376581,
-     1.587876864890574558, 1.574098216022999264, 1.560377222366167382,
-     1.546708779859908844, 1.533087877674041755, 1.519509584765938559,
-     1.505969036863201937, 1.492461423781352714, 1.478981976989922842,
-     1.465525957342709296, 1.452088642889222792, 1.438665316684561546,
-     1.425251254514058319, 1.411841712447055919, 1.398431914131003539,
-     1.385017037732650058, 1.371592202427340812, 1.358152454330141534,
-     1.34469275175354519, 1.331207949665625279, 1.317692783209412299,
-     1.304141850128615054, 1.290549591926194894, 1.27691027356015363,
-     1.263217961454619287, 1.249466499573066436, 1.23564948326336066,
-     1.221760230539994385, 1.207791750415947662, 1.193736707833126465,
-     1.17958738466398616, 1.165335636164750222, 1.150972842148865416,
-     1.136489852013158774, 1.121876922582540237, 1.107123647534034028,
-     1.092218876907275371, 1.077150624892893482, 1.061905963694822042,
-     1.046470900764042922, 1.030830236068192907, 1.014967395251327842,
-     0.9988642334929808131, 0.9825008035154263464, 0.9658550794011470098,
-     0.9489026255113034436, 0.9316161966151479401, 0.9139652510230292792,
-     0.8959153525809346874, 0.8774274291129204872, 0.8584568431938099931,
-     0.8389522142975741614, 0.8188539067003538507, 0.7980920606440534693,
-     0.7765839878947563557, 0.7542306644540520688, 0.7309119106424850631,
-     0.7064796113354325779, 0.6807479186691505202, 0.6534786387399710295,
-     0.6243585973360461505, 0.5929629424714434327, 0.5586921784081798625,
-     0.5206560387620546848, 0.4774378372966830431, 0.4265479863554152429,
-     0.3628714310970211909, 0.2723208648139477384, 0},
-    {0.001014352564120377413, 0.002669629083880922793, 0.005548995220771345792,
-     0.008624484412859888607, 0.01183947865788486861, 0.01516729801054656976,
-     0.01859210273701129151, 0.02210330461592709475, 0.02569329193593428151,
-     0.02935631744000685023, 0.03308788614622575758, 0.03688438878665621645,
-     0.04074286807444417458, 0.04466086220049143157, 0.04863629585986780496,
-     0.05266740190305100461, 0.05675266348104984759, 0.06089077034804041277,
-     0.06508058521306804567, 0.06932111739357792179, 0.07361150188411341722,
-     0.07795098251397346301, 0.08233889824223575293, 0.08677467189478028919,
-     0.09125780082683036809, 0.095787849121731522, 0.1003644410286559929,
-     0.1049872554094214289, 0.1096560210148404546, 0.1143705124488661323,
-     0.1191305467076509556, 0.1239359802028679736, 0.1287867061959434012,
-     0.1336826525834396151, 0.1386237799845948804, 0.1436100800906280339,
-     0.1486415742423425057, 0.1537183122081819397, 0.1588403711394795748,
-     0.1640078546834206341, 0.1692208922373653057, 0.1744796383307898324,
-     0.1797842721232958407, 0.1851349970089926078, 0.1905320403191375633,
-     0.1959756531162781534, 0.2014661100743140865, 0.2070037094399269362,
-     0.2125887730717307134, 0.2182216465543058426, 0.2239026993850088965,
-     0.229632325232116602, 0.2354109422634795556, 0.2412389935454402889,
-     0.2471169475123218551, 0.2530452985073261551, 0.2590245673962052742,
-     0.2650553022555897087, 0.271138079138385224, 0.2772735029191887857,
-     0.2834622082232336471, 0.2897048604429605656, 0.2960021568469337061,
-     0.3023548277864842593, 0.3087636380061818397, 0.3152293880650116065,
-     0.3217529158759855901, 0.3283350983728509642, 0.3349768533135899506,
-     0.3416791412315512977, 0.3484429675463274756, 0.355269384847918035,
-     0.3621594953693184626, 0.3691144536644731522, 0.376135469510563536,
-     0.3832238110559021416, 0.3903808082373155797, 0.3976078564938743676,
-     0.404906420807223999, 0.4122780401026620578, 0.4197243320495753771,
-     0.4272469983049970721, 0.4348478302499918513, 0.4425287152754694975,
-     0.4502916436820402768, 0.458138716267873114, 0.4660721526894572309,
-     0.4740943006930180559, 0.4822076463294863724, 0.4904148252838453348,
-     0.4987186354709807201, 0.5071220510755701794, 0.5156282382440030565,
-     0.5242405726729852944, 0.5329626593838373561, 0.5417983550254266145,
-     0.5507517931146057588, 0.5598274127040882009, 0.5690299910679523787,
-     0.5783646811197646898, 0.5878370544347081283, 0.5974531509445183408,
-     0.6072195366251219584, 0.6171433708188825973, 0.6272324852499290282,
-     0.6374954773350440806, 0.6479418211102242475, 0.6585820000500898219,
-     0.6694276673488921414, 0.6804918409973358395, 0.6917891434366769676,
-     0.7033360990161600101, 0.7151515074105005976, 0.7272569183441868201,
-     0.7396772436726493094, 0.7524415591746134169, 0.7655841738977066102,
-     0.7791460859296898134, 0.7931770117713072832, 0.8077382946829627652,
-     0.8229072113814113187, 0.8387836052959920519, 0.8555006078694531446,
-     0.873243048910072206, 0.8922816507840289901, 0.9130436479717434217,
-     0.9362826816850632339, 0.9635996931270905952, 1}};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// clang-format on
-// END GENERATED CODE
diff --git a/third_party/abseil/absl/random/gaussian_distribution.h b/third_party/abseil/absl/random/gaussian_distribution.h
deleted file mode 100644
index 4b07a5c..0000000
--- a/third_party/abseil/absl/random/gaussian_distribution.h
+++ /dev/null
@@ -1,275 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_GAUSSIAN_DISTRIBUTION_H_
-#define ABSL_RANDOM_GAUSSIAN_DISTRIBUTION_H_
-
-// absl::gaussian_distribution implements the Ziggurat algorithm
-// for generating random gaussian numbers.
-//
-// Implementation based on "The Ziggurat Method for Generating Random Variables"
-// by George Marsaglia and Wai Wan Tsang: http://www.jstatsoft.org/v05/i08/
-//
-
-#include <cmath>
-#include <cstdint>
-#include <istream>
-#include <limits>
-#include <type_traits>
-
-#include "absl/base/config.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/generate_real.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// absl::gaussian_distribution_base implements the underlying ziggurat algorithm
-// using the ziggurat tables generated by the gaussian_distribution_gentables
-// binary.
-//
-// The specific algorithm has some of the improvements suggested by the
-// 2005 paper, "An Improved Ziggurat Method to Generate Normal Random Samples",
-// Jurgen A Doornik.  (https://www.doornik.com/research/ziggurat.pdf)
-class ABSL_DLL gaussian_distribution_base {
- public:
-  template <typename URBG>
-  inline double zignor(URBG& g);  // NOLINT(runtime/references)
-
- private:
-  friend class TableGenerator;
-
-  template <typename URBG>
-  inline double zignor_fallback(URBG& g,  // NOLINT(runtime/references)
-                                bool neg);
-
-  // Constants used for the gaussian distribution.
-  static constexpr double kR = 3.442619855899;  // Start of the tail.
-  static constexpr double kRInv = 0.29047645161474317;  // ~= (1.0 / kR) .
-  static constexpr double kV = 9.91256303526217e-3;
-  static constexpr uint64_t kMask = 0x07f;
-
-  // The ziggurat tables store the pdf(f) and inverse-pdf(x) for equal-area
-  // points on one-half of the normal distribution, where the pdf function,
-  // pdf = e ^ (-1/2 *x^2), assumes that the mean = 0 & stddev = 1.
-  //
-  // These tables are just over 2kb in size; larger tables might improve the
-  // distributions, but also lead to more cache pollution.
-  //
-  // x = {3.71308, 3.44261, 3.22308, ..., 0}
-  // f = {0.00101, 0.00266, 0.00554, ..., 1}
-  struct Tables {
-    double x[kMask + 2];
-    double f[kMask + 2];
-  };
-  static const Tables zg_;
-  random_internal::FastUniformBits<uint64_t> fast_u64_;
-};
-
-}  // namespace random_internal
-
-// absl::gaussian_distribution:
-// Generates a number conforming to a Gaussian distribution.
-template <typename RealType = double>
-class gaussian_distribution : random_internal::gaussian_distribution_base {
- public:
-  using result_type = RealType;
-
-  class param_type {
-   public:
-    using distribution_type = gaussian_distribution;
-
-    explicit param_type(result_type mean = 0, result_type stddev = 1)
-        : mean_(mean), stddev_(stddev) {}
-
-    // Returns the mean distribution parameter.  The mean specifies the location
-    // of the peak.  The default value is 0.0.
-    result_type mean() const { return mean_; }
-
-    // Returns the deviation distribution parameter.  The default value is 1.0.
-    result_type stddev() const { return stddev_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.mean_ == b.mean_ && a.stddev_ == b.stddev_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    result_type mean_;
-    result_type stddev_;
-
-    static_assert(
-        std::is_floating_point<RealType>::value,
-        "Class-template absl::gaussian_distribution<> must be parameterized "
-        "using a floating-point type.");
-  };
-
-  gaussian_distribution() : gaussian_distribution(0) {}
-
-  explicit gaussian_distribution(result_type mean, result_type stddev = 1)
-      : param_(mean, stddev) {}
-
-  explicit gaussian_distribution(const param_type& p) : param_(p) {}
-
-  void reset() {}
-
-  // Generating functions
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  param_type param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  result_type(min)() const {
-    return -std::numeric_limits<result_type>::infinity();
-  }
-  result_type(max)() const {
-    return std::numeric_limits<result_type>::infinity();
-  }
-
-  result_type mean() const { return param_.mean(); }
-  result_type stddev() const { return param_.stddev(); }
-
-  friend bool operator==(const gaussian_distribution& a,
-                         const gaussian_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const gaussian_distribution& a,
-                         const gaussian_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  param_type param_;
-};
-
-// --------------------------------------------------------------------------
-// Implementation details only below
-// --------------------------------------------------------------------------
-
-template <typename RealType>
-template <typename URBG>
-typename gaussian_distribution<RealType>::result_type
-gaussian_distribution<RealType>::operator()(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  return p.mean() + p.stddev() * static_cast<result_type>(zignor(g));
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const gaussian_distribution<RealType>& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<RealType>::kPrecision);
-  os << x.mean() << os.fill() << x.stddev();
-  return os;
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    gaussian_distribution<RealType>& x) {   // NOLINT(runtime/references)
-  using result_type = typename gaussian_distribution<RealType>::result_type;
-  using param_type = typename gaussian_distribution<RealType>::param_type;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  auto mean = random_internal::read_floating_point<result_type>(is);
-  if (is.fail()) return is;
-  auto stddev = random_internal::read_floating_point<result_type>(is);
-  if (!is.fail()) {
-    x.param(param_type(mean, stddev));
-  }
-  return is;
-}
-
-namespace random_internal {
-
-template <typename URBG>
-inline double gaussian_distribution_base::zignor_fallback(URBG& g, bool neg) {
-  using random_internal::GeneratePositiveTag;
-  using random_internal::GenerateRealFromBits;
-
-  // This fallback path happens approximately 0.05% of the time.
-  double x, y;
-  do {
-    // kRInv = 1/r, U(0, 1)
-    x = kRInv *
-        std::log(GenerateRealFromBits<double, GeneratePositiveTag, false>(
-            fast_u64_(g)));
-    y = -std::log(
-        GenerateRealFromBits<double, GeneratePositiveTag, false>(fast_u64_(g)));
-  } while ((y + y) < (x * x));
-  return neg ? (x - kR) : (kR - x);
-}
-
-template <typename URBG>
-inline double gaussian_distribution_base::zignor(
-    URBG& g) {  // NOLINT(runtime/references)
-  using random_internal::GeneratePositiveTag;
-  using random_internal::GenerateRealFromBits;
-  using random_internal::GenerateSignedTag;
-
-  while (true) {
-    // We use a single uint64_t to generate both a double and a strip.
-    // These bits are unused when the generated double is > 1/2^5.
-    // This may introduce some bias from the duplicated low bits of small
-    // values (those smaller than 1/2^5, which all end up on the left tail).
-    uint64_t bits = fast_u64_(g);
-    int i = static_cast<int>(bits & kMask);  // pick a random strip
-    double j = GenerateRealFromBits<double, GenerateSignedTag, false>(
-        bits);  // U(-1, 1)
-    const double x = j * zg_.x[i];
-
-    // Retangular box. Handles >97% of all cases.
-    // For any given box, this handles between 75% and 99% of values.
-    // Equivalent to U(01) < (x[i+1] / x[i]), and when i == 0, ~93.5%
-    if (std::abs(x) < zg_.x[i + 1]) {
-      return x;
-    }
-
-    // i == 0: Base box. Sample using a ratio of uniforms.
-    if (i == 0) {
-      // This path happens about 0.05% of the time.
-      return zignor_fallback(g, j < 0);
-    }
-
-    // i > 0: Wedge samples using precomputed values.
-    double v = GenerateRealFromBits<double, GeneratePositiveTag, false>(
-        fast_u64_(g));  // U(0, 1)
-    if ((zg_.f[i + 1] + v * (zg_.f[i] - zg_.f[i + 1])) <
-        std::exp(-0.5 * x * x)) {
-      return x;
-    }
-
-    // The wedge was missed; reject the value and try again.
-  }
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_GAUSSIAN_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/gaussian_distribution_test.cc b/third_party/abseil/absl/random/gaussian_distribution_test.cc
deleted file mode 100644
index 2aa7caf..0000000
--- a/third_party/abseil/absl/random/gaussian_distribution_test.cc
+++ /dev/null
@@ -1,576 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/gaussian_distribution.h"
-
-#include <algorithm>
-#include <cmath>
-#include <cstddef>
-#include <ios>
-#include <iterator>
-#include <random>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_replace.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-using absl::random_internal::kChiSquared;
-
-template <typename RealType>
-class GaussianDistributionInterfaceTest : public ::testing::Test {};
-
-using RealTypes = ::testing::Types<float, double, long double>;
-TYPED_TEST_CASE(GaussianDistributionInterfaceTest, RealTypes);
-
-TYPED_TEST(GaussianDistributionInterfaceTest, SerializeTest) {
-  using param_type =
-      typename absl::gaussian_distribution<TypeParam>::param_type;
-
-  const TypeParam kParams[] = {
-      // Cases around 1.
-      1,                                           //
-      std::nextafter(TypeParam(1), TypeParam(0)),  // 1 - epsilon
-      std::nextafter(TypeParam(1), TypeParam(2)),  // 1 + epsilon
-      // Arbitrary values.
-      TypeParam(1e-8), TypeParam(1e-4), TypeParam(2), TypeParam(1e4),
-      TypeParam(1e8), TypeParam(1e20), TypeParam(2.5),
-      // Boundary cases.
-      std::numeric_limits<TypeParam>::infinity(),
-      std::numeric_limits<TypeParam>::max(),
-      std::numeric_limits<TypeParam>::epsilon(),
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(1)),           // min + epsilon
-      std::numeric_limits<TypeParam>::min(),  // smallest normal
-      // There are some errors dealing with denorms on apple platforms.
-      std::numeric_limits<TypeParam>::denorm_min(),  // smallest denorm
-      std::numeric_limits<TypeParam>::min() / 2,
-      std::nextafter(std::numeric_limits<TypeParam>::min(),
-                     TypeParam(0)),  // denorm_max
-  };
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-
-  // Use a loop to generate the combinations of {+/-x, +/-y}, and assign x, y to
-  // all values in kParams,
-  for (const auto mod : {0, 1, 2, 3}) {
-    for (const auto x : kParams) {
-      if (!std::isfinite(x)) continue;
-      for (const auto y : kParams) {
-        const TypeParam mean = (mod & 0x1) ? -x : x;
-        const TypeParam stddev = (mod & 0x2) ? -y : y;
-        const param_type param(mean, stddev);
-
-        absl::gaussian_distribution<TypeParam> before(mean, stddev);
-        EXPECT_EQ(before.mean(), param.mean());
-        EXPECT_EQ(before.stddev(), param.stddev());
-
-        {
-          absl::gaussian_distribution<TypeParam> via_param(param);
-          EXPECT_EQ(via_param, before);
-          EXPECT_EQ(via_param.param(), before.param());
-        }
-
-        // Smoke test.
-        auto sample_min = before.max();
-        auto sample_max = before.min();
-        for (int i = 0; i < kCount; i++) {
-          auto sample = before(gen);
-          if (sample > sample_max) sample_max = sample;
-          if (sample < sample_min) sample_min = sample;
-          EXPECT_GE(sample, before.min()) << before;
-          EXPECT_LE(sample, before.max()) << before;
-        }
-        if (!std::is_same<TypeParam, long double>::value) {
-          ABSL_INTERNAL_LOG(
-              INFO, absl::StrFormat("Range{%f, %f}: %f, %f", mean, stddev,
-                                    sample_min, sample_max));
-        }
-
-        std::stringstream ss;
-        ss << before;
-
-        if (!std::isfinite(mean) || !std::isfinite(stddev)) {
-          // Streams do not parse inf/nan.
-          continue;
-        }
-
-        // Validate stream serialization.
-        absl::gaussian_distribution<TypeParam> after(-0.53f, 2.3456f);
-
-        EXPECT_NE(before.mean(), after.mean());
-        EXPECT_NE(before.stddev(), after.stddev());
-        EXPECT_NE(before.param(), after.param());
-        EXPECT_NE(before, after);
-
-        ss >> after;
-
-#if defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \
-    defined(__ppc__) || defined(__PPC__)
-        if (std::is_same<TypeParam, long double>::value) {
-          // Roundtripping floating point values requires sufficient precision
-          // to reconstruct the exact value.  It turns out that long double
-          // has some errors doing this on ppc, particularly for values
-          // near {1.0 +/- epsilon}.
-          if (mean <= std::numeric_limits<double>::max() &&
-              mean >= std::numeric_limits<double>::lowest()) {
-            EXPECT_EQ(static_cast<double>(before.mean()),
-                      static_cast<double>(after.mean()))
-                << ss.str();
-          }
-          if (stddev <= std::numeric_limits<double>::max() &&
-              stddev >= std::numeric_limits<double>::lowest()) {
-            EXPECT_EQ(static_cast<double>(before.stddev()),
-                      static_cast<double>(after.stddev()))
-                << ss.str();
-          }
-          continue;
-        }
-#endif
-
-        EXPECT_EQ(before.mean(), after.mean());
-        EXPECT_EQ(before.stddev(), after.stddev())  //
-            << ss.str() << " "                      //
-            << (ss.good() ? "good " : "")           //
-            << (ss.bad() ? "bad " : "")             //
-            << (ss.eof() ? "eof " : "")             //
-            << (ss.fail() ? "fail " : "");
-      }
-    }
-  }
-}
-
-// http://www.itl.nist.gov/div898/handbook/eda/section3/eda3661.htm
-
-class GaussianModel {
- public:
-  GaussianModel(double mean, double stddev) : mean_(mean), stddev_(stddev) {}
-
-  double mean() const { return mean_; }
-  double variance() const { return stddev() * stddev(); }
-  double stddev() const { return stddev_; }
-  double skew() const { return 0; }
-  double kurtosis() const { return 3.0; }
-
-  // The inverse CDF, or PercentPoint function.
-  double InverseCDF(double p) {
-    ABSL_ASSERT(p >= 0.0);
-    ABSL_ASSERT(p < 1.0);
-    return mean() + stddev() * -absl::random_internal::InverseNormalSurvival(p);
-  }
-
- private:
-  const double mean_;
-  const double stddev_;
-};
-
-struct Param {
-  double mean;
-  double stddev;
-  double p_fail;  // Z-Test probability of failure.
-  int trials;     // Z-Test trials.
-};
-
-// GaussianDistributionTests implements a z-test for the gaussian
-// distribution.
-class GaussianDistributionTests : public testing::TestWithParam<Param>,
-                                  public GaussianModel {
- public:
-  GaussianDistributionTests()
-      : GaussianModel(GetParam().mean, GetParam().stddev) {}
-
-  // SingleZTest provides a basic z-squared test of the mean vs. expected
-  // mean for data generated by the poisson distribution.
-  template <typename D>
-  bool SingleZTest(const double p, const size_t samples);
-
-  // SingleChiSquaredTest provides a basic chi-squared test of the normal
-  // distribution.
-  template <typename D>
-  double SingleChiSquaredTest();
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
-};
-
-template <typename D>
-bool GaussianDistributionTests::SingleZTest(const double p,
-                                            const size_t samples) {
-  D dis(mean(), stddev());
-
-  std::vector<double> data;
-  data.reserve(samples);
-  for (size_t i = 0; i < samples; i++) {
-    const double x = dis(rng_);
-    data.push_back(x);
-  }
-
-  const double max_err = absl::random_internal::MaxErrorTolerance(p);
-  const auto m = absl::random_internal::ComputeDistributionMoments(data);
-  const double z = absl::random_internal::ZScore(mean(), m);
-  const bool pass = absl::random_internal::Near("z", z, 0.0, max_err);
-
-  // NOTE: Informational statistical test:
-  //
-  // Compute the Jarque-Bera test statistic given the excess skewness
-  // and kurtosis. The statistic is drawn from a chi-square(2) distribution.
-  // https://en.wikipedia.org/wiki/Jarque%E2%80%93Bera_test
-  //
-  // The null-hypothesis (normal distribution) is rejected when
-  // (p = 0.05 => jb > 5.99)
-  // (p = 0.01 => jb > 9.21)
-  // NOTE: JB has a large type-I error rate, so it will reject the
-  // null-hypothesis even when it is true more often than the z-test.
-  //
-  const double jb =
-      static_cast<double>(m.n) / 6.0 *
-      (std::pow(m.skewness, 2.0) + std::pow(m.kurtosis - 3.0, 2.0) / 4.0);
-
-  if (!pass || jb > 9.21) {
-    ABSL_INTERNAL_LOG(
-        INFO, absl::StrFormat("p=%f max_err=%f\n"
-                              " mean=%f vs. %f\n"
-                              " stddev=%f vs. %f\n"
-                              " skewness=%f vs. %f\n"
-                              " kurtosis=%f vs. %f\n"
-                              " z=%f vs. 0\n"
-                              " jb=%f vs. 9.21",
-                              p, max_err, m.mean, mean(), std::sqrt(m.variance),
-                              stddev(), m.skewness, skew(), m.kurtosis,
-                              kurtosis(), z, jb));
-  }
-  return pass;
-}
-
-template <typename D>
-double GaussianDistributionTests::SingleChiSquaredTest() {
-  const size_t kSamples = 10000;
-  const int kBuckets = 50;
-
-  // The InverseCDF is the percent point function of the
-  // distribution, and can be used to assign buckets
-  // roughly uniformly.
-  std::vector<double> cutoffs;
-  const double kInc = 1.0 / static_cast<double>(kBuckets);
-  for (double p = kInc; p < 1.0; p += kInc) {
-    cutoffs.push_back(InverseCDF(p));
-  }
-  if (cutoffs.back() != std::numeric_limits<double>::infinity()) {
-    cutoffs.push_back(std::numeric_limits<double>::infinity());
-  }
-
-  D dis(mean(), stddev());
-
-  std::vector<int32_t> counts(cutoffs.size(), 0);
-  for (int j = 0; j < kSamples; j++) {
-    const double x = dis(rng_);
-    auto it = std::upper_bound(cutoffs.begin(), cutoffs.end(), x);
-    counts[std::distance(cutoffs.begin(), it)]++;
-  }
-
-  // Null-hypothesis is that the distribution is a gaussian distribution
-  // with the provided mean and stddev (not estimated from the data).
-  const int dof = static_cast<int>(counts.size()) - 1;
-
-  // Our threshold for logging is 1-in-50.
-  const double threshold = absl::random_internal::ChiSquareValue(dof, 0.98);
-
-  const double expected =
-      static_cast<double>(kSamples) / static_cast<double>(counts.size());
-
-  double chi_square = absl::random_internal::ChiSquareWithExpected(
-      std::begin(counts), std::end(counts), expected);
-  double p = absl::random_internal::ChiSquarePValue(chi_square, dof);
-
-  // Log if the chi_square value is above the threshold.
-  if (chi_square > threshold) {
-    for (int i = 0; i < cutoffs.size(); i++) {
-      ABSL_INTERNAL_LOG(
-          INFO, absl::StrFormat("%d : (%f) = %d", i, cutoffs[i], counts[i]));
-    }
-
-    ABSL_INTERNAL_LOG(
-        INFO, absl::StrCat("mean=", mean(), " stddev=", stddev(), "\n",   //
-                           " expected ", expected, "\n",                  //
-                           kChiSquared, " ", chi_square, " (", p, ")\n",  //
-                           kChiSquared, " @ 0.98 = ", threshold));
-  }
-  return p;
-}
-
-TEST_P(GaussianDistributionTests, ZTest) {
-  // TODO(absl-team): Run these tests against std::normal_distribution<double>
-  // to validate outcomes are similar.
-  const size_t kSamples = 10000;
-  const auto& param = GetParam();
-  const int expected_failures =
-      std::max(1, static_cast<int>(std::ceil(param.trials * param.p_fail)));
-  const double p = absl::random_internal::RequiredSuccessProbability(
-      param.p_fail, param.trials);
-
-  int failures = 0;
-  for (int i = 0; i < param.trials; i++) {
-    failures +=
-        SingleZTest<absl::gaussian_distribution<double>>(p, kSamples) ? 0 : 1;
-  }
-  EXPECT_LE(failures, expected_failures);
-}
-
-TEST_P(GaussianDistributionTests, ChiSquaredTest) {
-  const int kTrials = 20;
-  int failures = 0;
-
-  for (int i = 0; i < kTrials; i++) {
-    double p_value =
-        SingleChiSquaredTest<absl::gaussian_distribution<double>>();
-    if (p_value < 0.0025) {  // 1/400
-      failures++;
-    }
-  }
-  // There is a 0.05% chance of producing at least one failure, so raise the
-  // failure threshold high enough to allow for a flake rate of less than one in
-  // 10,000.
-  EXPECT_LE(failures, 4);
-}
-
-std::vector<Param> GenParams() {
-  return {
-      // Mean around 0.
-      Param{0.0, 1.0, 0.01, 100},
-      Param{0.0, 1e2, 0.01, 100},
-      Param{0.0, 1e4, 0.01, 100},
-      Param{0.0, 1e8, 0.01, 100},
-      Param{0.0, 1e16, 0.01, 100},
-      Param{0.0, 1e-3, 0.01, 100},
-      Param{0.0, 1e-5, 0.01, 100},
-      Param{0.0, 1e-9, 0.01, 100},
-      Param{0.0, 1e-17, 0.01, 100},
-
-      // Mean around 1.
-      Param{1.0, 1.0, 0.01, 100},
-      Param{1.0, 1e2, 0.01, 100},
-      Param{1.0, 1e-2, 0.01, 100},
-
-      // Mean around 100 / -100
-      Param{1e2, 1.0, 0.01, 100},
-      Param{-1e2, 1.0, 0.01, 100},
-      Param{1e2, 1e6, 0.01, 100},
-      Param{-1e2, 1e6, 0.01, 100},
-
-      // More extreme
-      Param{1e4, 1e4, 0.01, 100},
-      Param{1e8, 1e4, 0.01, 100},
-      Param{1e12, 1e4, 0.01, 100},
-  };
-}
-
-std::string ParamName(const ::testing::TestParamInfo<Param>& info) {
-  const auto& p = info.param;
-  std::string name = absl::StrCat("mean_", absl::SixDigits(p.mean), "__stddev_",
-                                  absl::SixDigits(p.stddev));
-  return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
-}
-
-INSTANTIATE_TEST_SUITE_P(All, GaussianDistributionTests,
-                         ::testing::ValuesIn(GenParams()), ParamName);
-
-// NOTE: absl::gaussian_distribution is not guaranteed to be stable.
-TEST(GaussianDistributionTest, StabilityTest) {
-  // absl::gaussian_distribution stability relies on the underlying zignor
-  // data, absl::random_interna::RandU64ToDouble, std::exp, std::log, and
-  // std::abs.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(11);
-
-  {
-    absl::gaussian_distribution<double> dist;
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return static_cast<int>(10000000.0 * dist(urbg)); });
-
-    EXPECT_EQ(13, urbg.invocations());
-    EXPECT_THAT(output,  //
-                testing::ElementsAre(1494, 25518841, 9991550, 1351856,
-                                     -20373238, 3456682, 333530, -6804981,
-                                     -15279580, -16459654, 1494));
-  }
-
-  urbg.reset();
-  {
-    absl::gaussian_distribution<float> dist;
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return static_cast<int>(1000000.0f * dist(urbg)); });
-
-    EXPECT_EQ(13, urbg.invocations());
-    EXPECT_THAT(
-        output,  //
-        testing::ElementsAre(149, 2551884, 999155, 135185, -2037323, 345668,
-                             33353, -680498, -1527958, -1645965, 149));
-  }
-}
-
-// This is an implementation-specific test. If any part of the implementation
-// changes, then it is likely that this test will change as well.
-// Also, if dependencies of the distribution change, such as RandU64ToDouble,
-// then this is also likely to change.
-TEST(GaussianDistributionTest, AlgorithmBounds) {
-  absl::gaussian_distribution<double> dist;
-
-  // In ~95% of cases, a single value is used to generate the output.
-  // for all inputs where |x| < 0.750461021389 this should be the case.
-  //
-  // The exact constraints are based on the ziggurat tables, and any
-  // changes to the ziggurat tables may require adjusting these bounds.
-  //
-  // for i in range(0, len(X)-1):
-  //   print i, X[i+1]/X[i], (X[i+1]/X[i] > 0.984375)
-  //
-  // 0.125 <= |values| <= 0.75
-  const uint64_t kValues[] = {
-      0x1000000000000100ull, 0x2000000000000100ull, 0x3000000000000100ull,
-      0x4000000000000100ull, 0x5000000000000100ull, 0x6000000000000100ull,
-      // negative values
-      0x9000000000000100ull, 0xa000000000000100ull, 0xb000000000000100ull,
-      0xc000000000000100ull, 0xd000000000000100ull, 0xe000000000000100ull};
-
-  // 0.875 <= |values| <= 0.984375
-  const uint64_t kExtraValues[] = {
-      0x7000000000000100ull, 0x7800000000000100ull,  //
-      0x7c00000000000100ull, 0x7e00000000000100ull,  //
-      // negative values
-      0xf000000000000100ull, 0xf800000000000100ull,  //
-      0xfc00000000000100ull, 0xfe00000000000100ull};
-
-  auto make_box = [](uint64_t v, uint64_t box) {
-    return (v & 0xffffffffffffff80ull) | box;
-  };
-
-  // The box is the lower 7 bits of the value. When the box == 0, then
-  // the algorithm uses an escape hatch to select the result for large
-  // outputs.
-  for (uint64_t box = 0; box < 0x7f; box++) {
-    for (const uint64_t v : kValues) {
-      // Extra values are added to the sequence to attempt to avoid
-      // infinite loops from rejection sampling on bugs/errors.
-      absl::random_internal::sequence_urbg urbg(
-          {make_box(v, box), 0x0003eb76f6f7f755ull, 0x5FCEA50FDB2F953Bull});
-
-      auto a = dist(urbg);
-      EXPECT_EQ(1, urbg.invocations()) << box << " " << std::hex << v;
-      if (v & 0x8000000000000000ull) {
-        EXPECT_LT(a, 0.0) << box << " " << std::hex << v;
-      } else {
-        EXPECT_GT(a, 0.0) << box << " " << std::hex << v;
-      }
-    }
-    if (box > 10 && box < 100) {
-      // The center boxes use the fast algorithm for more
-      // than 98.4375% of values.
-      for (const uint64_t v : kExtraValues) {
-        absl::random_internal::sequence_urbg urbg(
-            {make_box(v, box), 0x0003eb76f6f7f755ull, 0x5FCEA50FDB2F953Bull});
-
-        auto a = dist(urbg);
-        EXPECT_EQ(1, urbg.invocations()) << box << " " << std::hex << v;
-        if (v & 0x8000000000000000ull) {
-          EXPECT_LT(a, 0.0) << box << " " << std::hex << v;
-        } else {
-          EXPECT_GT(a, 0.0) << box << " " << std::hex << v;
-        }
-      }
-    }
-  }
-
-  // When the box == 0, the fallback algorithm uses a ratio of uniforms,
-  // which consumes 2 additional values from the urbg.
-  // Fallback also requires that the initial value be > 0.9271586026096681.
-  auto make_fallback = [](uint64_t v) { return (v & 0xffffffffffffff80ull); };
-
-  double tail[2];
-  {
-    // 0.9375
-    absl::random_internal::sequence_urbg urbg(
-        {make_fallback(0x7800000000000000ull), 0x13CCA830EB61BD96ull,
-         0x00000076f6f7f755ull});
-    tail[0] = dist(urbg);
-    EXPECT_EQ(3, urbg.invocations());
-    EXPECT_GT(tail[0], 0);
-  }
-  {
-    // -0.9375
-    absl::random_internal::sequence_urbg urbg(
-        {make_fallback(0xf800000000000000ull), 0x13CCA830EB61BD96ull,
-         0x00000076f6f7f755ull});
-    tail[1] = dist(urbg);
-    EXPECT_EQ(3, urbg.invocations());
-    EXPECT_LT(tail[1], 0);
-  }
-  EXPECT_EQ(tail[0], -tail[1]);
-  EXPECT_EQ(418610, static_cast<int64_t>(tail[0] * 100000.0));
-
-  // When the box != 0, the fallback algorithm computes a wedge function.
-  // Depending on the box, the threshold for varies as high as
-  // 0.991522480228.
-  {
-    // 0.9921875, 0.875
-    absl::random_internal::sequence_urbg urbg(
-        {make_box(0x7f00000000000000ull, 120), 0xe000000000000001ull,
-         0x13CCA830EB61BD96ull});
-    tail[0] = dist(urbg);
-    EXPECT_EQ(2, urbg.invocations());
-    EXPECT_GT(tail[0], 0);
-  }
-  {
-    // -0.9921875, 0.875
-    absl::random_internal::sequence_urbg urbg(
-        {make_box(0xff00000000000000ull, 120), 0xe000000000000001ull,
-         0x13CCA830EB61BD96ull});
-    tail[1] = dist(urbg);
-    EXPECT_EQ(2, urbg.invocations());
-    EXPECT_LT(tail[1], 0);
-  }
-  EXPECT_EQ(tail[0], -tail[1]);
-  EXPECT_EQ(61948, static_cast<int64_t>(tail[0] * 100000.0));
-
-  // Fallback rejected, try again.
-  {
-    // -0.9921875, 0.0625
-    absl::random_internal::sequence_urbg urbg(
-        {make_box(0xff00000000000000ull, 120), 0x1000000000000001,
-         make_box(0x1000000000000100ull, 50), 0x13CCA830EB61BD96ull});
-    dist(urbg);
-    EXPECT_EQ(3, urbg.invocations());
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/generators_test.cc b/third_party/abseil/absl/random/generators_test.cc
deleted file mode 100644
index 41725f1..0000000
--- a/third_party/abseil/absl/random/generators_test.cc
+++ /dev/null
@@ -1,179 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstddef>
-#include <cstdint>
-#include <random>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/random/distributions.h"
-#include "absl/random/random.h"
-
-namespace {
-
-template <typename URBG>
-void TestUniform(URBG* gen) {
-  // [a, b) default-semantics, inferred types.
-  absl::Uniform(*gen, 0, 100);     // int
-  absl::Uniform(*gen, 0, 1.0);     // Promoted to double
-  absl::Uniform(*gen, 0.0f, 1.0);  // Promoted to double
-  absl::Uniform(*gen, 0.0, 1.0);   // double
-  absl::Uniform(*gen, -1, 1L);     // Promoted to long
-
-  // Roll a die.
-  absl::Uniform(absl::IntervalClosedClosed, *gen, 1, 6);
-
-  // Get a fraction.
-  absl::Uniform(absl::IntervalOpenOpen, *gen, 0.0, 1.0);
-
-  // Assign a value to a random element.
-  std::vector<int> elems = {10, 20, 30, 40, 50};
-  elems[absl::Uniform(*gen, 0u, elems.size())] = 5;
-  elems[absl::Uniform<size_t>(*gen, 0, elems.size())] = 3;
-
-  // Choose some epsilon around zero.
-  absl::Uniform(absl::IntervalOpenOpen, *gen, -1.0, 1.0);
-
-  // (a, b) semantics, inferred types.
-  absl::Uniform(absl::IntervalOpenOpen, *gen, 0, 1.0);  // Promoted to double
-
-  // Explict overriding of types.
-  absl::Uniform<int>(*gen, 0, 100);
-  absl::Uniform<int8_t>(*gen, 0, 100);
-  absl::Uniform<int16_t>(*gen, 0, 100);
-  absl::Uniform<uint16_t>(*gen, 0, 100);
-  absl::Uniform<int32_t>(*gen, 0, 1 << 10);
-  absl::Uniform<uint32_t>(*gen, 0, 1 << 10);
-  absl::Uniform<int64_t>(*gen, 0, 1 << 10);
-  absl::Uniform<uint64_t>(*gen, 0, 1 << 10);
-
-  absl::Uniform<float>(*gen, 0.0, 1.0);
-  absl::Uniform<float>(*gen, 0, 1);
-  absl::Uniform<float>(*gen, -1, 1);
-  absl::Uniform<double>(*gen, 0.0, 1.0);
-
-  absl::Uniform<float>(*gen, -1.0, 0);
-  absl::Uniform<double>(*gen, -1.0, 0);
-
-  // Tagged
-  absl::Uniform<double>(absl::IntervalClosedClosed, *gen, 0, 1);
-  absl::Uniform<double>(absl::IntervalClosedOpen, *gen, 0, 1);
-  absl::Uniform<double>(absl::IntervalOpenOpen, *gen, 0, 1);
-  absl::Uniform<double>(absl::IntervalOpenClosed, *gen, 0, 1);
-  absl::Uniform<double>(absl::IntervalClosedClosed, *gen, 0, 1);
-  absl::Uniform<double>(absl::IntervalOpenOpen, *gen, 0, 1);
-
-  absl::Uniform<int>(absl::IntervalClosedClosed, *gen, 0, 100);
-  absl::Uniform<int>(absl::IntervalClosedOpen, *gen, 0, 100);
-  absl::Uniform<int>(absl::IntervalOpenOpen, *gen, 0, 100);
-  absl::Uniform<int>(absl::IntervalOpenClosed, *gen, 0, 100);
-  absl::Uniform<int>(absl::IntervalClosedClosed, *gen, 0, 100);
-  absl::Uniform<int>(absl::IntervalOpenOpen, *gen, 0, 100);
-
-  // With *generator as an R-value reference.
-  absl::Uniform<int>(URBG(), 0, 100);
-  absl::Uniform<double>(URBG(), 0.0, 1.0);
-}
-
-template <typename URBG>
-void TestExponential(URBG* gen) {
-  absl::Exponential<float>(*gen);
-  absl::Exponential<double>(*gen);
-  absl::Exponential<double>(URBG());
-}
-
-template <typename URBG>
-void TestPoisson(URBG* gen) {
-  // [rand.dist.pois] Indicates that the std::poisson_distribution
-  // is parameterized by IntType, however MSVC does not allow 8-bit
-  // types.
-  absl::Poisson<int>(*gen);
-  absl::Poisson<int16_t>(*gen);
-  absl::Poisson<uint16_t>(*gen);
-  absl::Poisson<int32_t>(*gen);
-  absl::Poisson<uint32_t>(*gen);
-  absl::Poisson<int64_t>(*gen);
-  absl::Poisson<uint64_t>(*gen);
-  absl::Poisson<uint64_t>(URBG());
-}
-
-template <typename URBG>
-void TestBernoulli(URBG* gen) {
-  absl::Bernoulli(*gen, 0.5);
-  absl::Bernoulli(*gen, 0.5);
-}
-
-template <typename URBG>
-void TestZipf(URBG* gen) {
-  absl::Zipf<int>(*gen, 100);
-  absl::Zipf<int8_t>(*gen, 100);
-  absl::Zipf<int16_t>(*gen, 100);
-  absl::Zipf<uint16_t>(*gen, 100);
-  absl::Zipf<int32_t>(*gen, 1 << 10);
-  absl::Zipf<uint32_t>(*gen, 1 << 10);
-  absl::Zipf<int64_t>(*gen, 1 << 10);
-  absl::Zipf<uint64_t>(*gen, 1 << 10);
-  absl::Zipf<uint64_t>(URBG(), 1 << 10);
-}
-
-template <typename URBG>
-void TestGaussian(URBG* gen) {
-  absl::Gaussian<float>(*gen, 1.0, 1.0);
-  absl::Gaussian<double>(*gen, 1.0, 1.0);
-  absl::Gaussian<double>(URBG(), 1.0, 1.0);
-}
-
-template <typename URBG>
-void TestLogNormal(URBG* gen) {
-  absl::LogUniform<int>(*gen, 0, 100);
-  absl::LogUniform<int8_t>(*gen, 0, 100);
-  absl::LogUniform<int16_t>(*gen, 0, 100);
-  absl::LogUniform<uint16_t>(*gen, 0, 100);
-  absl::LogUniform<int32_t>(*gen, 0, 1 << 10);
-  absl::LogUniform<uint32_t>(*gen, 0, 1 << 10);
-  absl::LogUniform<int64_t>(*gen, 0, 1 << 10);
-  absl::LogUniform<uint64_t>(*gen, 0, 1 << 10);
-  absl::LogUniform<uint64_t>(URBG(), 0, 1 << 10);
-}
-
-template <typename URBG>
-void CompatibilityTest() {
-  URBG gen;
-
-  TestUniform(&gen);
-  TestExponential(&gen);
-  TestPoisson(&gen);
-  TestBernoulli(&gen);
-  TestZipf(&gen);
-  TestGaussian(&gen);
-  TestLogNormal(&gen);
-}
-
-TEST(std_mt19937_64, Compatibility) {
-  // Validate with std::mt19937_64
-  CompatibilityTest<std::mt19937_64>();
-}
-
-TEST(BitGen, Compatibility) {
-  // Validate with absl::BitGen
-  CompatibilityTest<absl::BitGen>();
-}
-
-TEST(InsecureBitGen, Compatibility) {
-  // Validate with absl::InsecureBitGen
-  CompatibilityTest<absl::InsecureBitGen>();
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/BUILD.bazel b/third_party/abseil/absl/random/internal/BUILD.bazel
deleted file mode 100644
index 2c1a5f4..0000000
--- a/third_party/abseil/absl/random/internal/BUILD.bazel
+++ /dev/null
@@ -1,731 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-
-# Internal-only implementation classes for Abseil Random
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_RANDOM_RANDEN_COPTS",
-    "ABSL_TEST_COPTS",
-    "absl_random_randen_copts_init",
-)
-
-package(default_visibility = [
-    "//absl/random:__pkg__",
-])
-
-licenses(["notice"])
-
-cc_library(
-    name = "traits",
-    hdrs = ["traits.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/base:config"],
-)
-
-cc_library(
-    name = "distribution_caller",
-    hdrs = ["distribution_caller.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:fast_type_id",
-        "//absl/utility",
-    ],
-)
-
-cc_library(
-    name = "fast_uniform_bits",
-    hdrs = [
-        "fast_uniform_bits.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_library(
-    name = "seed_material",
-    srcs = [
-        "seed_material.cc",
-    ],
-    hdrs = [
-        "seed_material.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS + select({
-        "//absl:windows": ["-DEFAULTLIB:bcrypt.lib"],
-        "//conditions:default": [],
-    }),
-    deps = [
-        ":fast_uniform_bits",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-        "//absl/types:optional",
-        "//absl/types:span",
-    ],
-)
-
-cc_library(
-    name = "pool_urbg",
-    srcs = [
-        "pool_urbg.cc",
-    ],
-    hdrs = [
-        "pool_urbg.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = select({
-        "//absl:windows": [],
-        "//absl:wasm": [],
-        "//conditions:default": ["-pthread"],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":randen",
-        ":seed_material",
-        ":traits",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/base:raw_logging_internal",
-        "//absl/random:seed_gen_exception",
-        "//absl/types:span",
-    ],
-)
-
-cc_library(
-    name = "explicit_seed_seq",
-    testonly = 1,
-    hdrs = [
-        "explicit_seed_seq.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/base:config"],
-)
-
-cc_library(
-    name = "sequence_urbg",
-    testonly = 1,
-    hdrs = [
-        "sequence_urbg.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/base:config"],
-)
-
-cc_library(
-    name = "salted_seed_seq",
-    hdrs = [
-        "salted_seed_seq.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":seed_material",
-        "//absl/container:inlined_vector",
-        "//absl/meta:type_traits",
-        "//absl/types:optional",
-        "//absl/types:span",
-    ],
-)
-
-cc_library(
-    name = "iostream_state_saver",
-    hdrs = ["iostream_state_saver.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/meta:type_traits",
-        "//absl/numeric:int128",
-    ],
-)
-
-cc_library(
-    name = "generate_real",
-    hdrs = [
-        "generate_real.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":fastmath",
-        ":traits",
-        "//absl/meta:type_traits",
-        "//absl/numeric:bits",
-    ],
-)
-
-cc_library(
-    name = "fastmath",
-    hdrs = [
-        "fastmath.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = ["//absl/numeric:bits"],
-)
-
-cc_library(
-    name = "wide_multiply",
-    hdrs = ["wide_multiply.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":traits",
-        "//absl/base:config",
-        "//absl/numeric:bits",
-        "//absl/numeric:int128",
-    ],
-)
-
-cc_library(
-    name = "nonsecure_base",
-    hdrs = ["nonsecure_base.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":pool_urbg",
-        ":salted_seed_seq",
-        ":seed_material",
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-        "//absl/types:optional",
-        "//absl/types:span",
-    ],
-)
-
-cc_library(
-    name = "pcg_engine",
-    hdrs = ["pcg_engine.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":fastmath",
-        ":iostream_state_saver",
-        "//absl/base:config",
-        "//absl/meta:type_traits",
-        "//absl/numeric:bits",
-        "//absl/numeric:int128",
-    ],
-)
-
-cc_library(
-    name = "randen_engine",
-    hdrs = ["randen_engine.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":iostream_state_saver",
-        ":randen",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_library(
-    name = "platform",
-    srcs = [
-        "randen_round_keys.cc",
-    ],
-    hdrs = [
-        "randen_traits.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    textual_hdrs = [
-        "platform.h",
-    ],
-    deps = ["//absl/base:config"],
-)
-
-cc_library(
-    name = "randen",
-    srcs = [
-        "randen.cc",
-    ],
-    hdrs = [
-        "randen.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":platform",
-        ":randen_hwaes",
-        ":randen_slow",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "randen_slow",
-    srcs = ["randen_slow.cc"],
-    hdrs = ["randen_slow.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":platform",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-absl_random_randen_copts_init()
-
-cc_library(
-    name = "randen_hwaes",
-    srcs = [
-        "randen_detect.cc",
-    ],
-    hdrs = [
-        "randen_detect.h",
-        "randen_hwaes.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":platform",
-        ":randen_hwaes_impl",
-        "//absl/base:config",
-    ],
-)
-
-# build with --save_temps to see assembly language output.
-cc_library(
-    name = "randen_hwaes_impl",
-    srcs = [
-        "randen_hwaes.cc",
-        "randen_hwaes.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS + ABSL_RANDOM_RANDEN_COPTS + select({
-        "//absl:windows": [],
-        "//conditions:default": ["-Wno-pass-failed"],
-    }),
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":platform",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_binary(
-    name = "gaussian_distribution_gentables",
-    srcs = [
-        "gaussian_distribution_gentables.cc",
-    ],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:core_headers",
-        "//absl/random:distributions",
-    ],
-)
-
-cc_library(
-    name = "distribution_test_util",
-    testonly = 1,
-    srcs = [
-        "chi_square.cc",
-        "distribution_test_util.cc",
-    ],
-    hdrs = [
-        "chi_square.h",
-        "distribution_test_util.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-        "//absl/strings:str_format",
-        "//absl/types:span",
-    ],
-)
-
-# Common tags for tests, etc.
-ABSL_RANDOM_NONPORTABLE_TAGS = [
-    "no_test_android_arm",
-    "no_test_android_arm64",
-    "no_test_android_x86",
-    "no_test_darwin_x86_64",
-    "no_test_ios_x86_64",
-    "no_test_loonix",
-    "no_test_msvc_x64",
-    "no_test_wasm",
-]
-
-cc_test(
-    name = "traits_test",
-    size = "small",
-    srcs = ["traits_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "generate_real_test",
-    size = "small",
-    srcs = [
-        "generate_real_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":generate_real",
-        "//absl/flags:flag",
-        "//absl/numeric:bits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "distribution_test_util_test",
-    size = "small",
-    srcs = ["distribution_test_util_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distribution_test_util",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "fastmath_test",
-    size = "small",
-    srcs = ["fastmath_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":fastmath",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "explicit_seed_seq_test",
-    size = "small",
-    srcs = ["explicit_seed_seq_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":explicit_seed_seq",
-        "//absl/random:seed_sequences",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "salted_seed_seq_test",
-    size = "small",
-    srcs = ["salted_seed_seq_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":salted_seed_seq",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "chi_square_test",
-    size = "small",
-    srcs = [
-        "chi_square_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":distribution_test_util",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "fast_uniform_bits_test",
-    size = "small",
-    srcs = [
-        "fast_uniform_bits_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":fast_uniform_bits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "mock_helpers",
-    hdrs = ["mock_helpers.h"],
-    deps = [
-        "//absl/base:fast_type_id",
-        "//absl/types:optional",
-    ],
-)
-
-cc_library(
-    name = "mock_overload_set",
-    testonly = 1,
-    hdrs = ["mock_overload_set.h"],
-    deps = [
-        ":mock_helpers",
-        "//absl/random:mocking_bit_gen",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "nonsecure_base_test",
-    size = "small",
-    srcs = [
-        "nonsecure_base_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":nonsecure_base",
-        "//absl/random",
-        "//absl/random:distributions",
-        "//absl/random:seed_sequences",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "seed_material_test",
-    size = "small",
-    srcs = ["seed_material_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":seed_material",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "pool_urbg_test",
-    size = "small",
-    srcs = [
-        "pool_urbg_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":pool_urbg",
-        "//absl/meta:type_traits",
-        "//absl/types:span",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "pcg_engine_test",
-    size = "medium",  # Trying to measure accuracy.
-    srcs = ["pcg_engine_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    flaky = 1,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":explicit_seed_seq",
-        ":pcg_engine",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "randen_engine_test",
-    size = "medium",
-    srcs = [
-        "randen_engine_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":explicit_seed_seq",
-        ":randen_engine",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "randen_test",
-    size = "small",
-    srcs = ["randen_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":randen",
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "randen_slow_test",
-    size = "small",
-    srcs = ["randen_slow_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":platform",
-        ":randen_slow",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "randen_hwaes_test",
-    size = "small",
-    srcs = ["randen_hwaes_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ABSL_RANDOM_NONPORTABLE_TAGS,
-    deps = [
-        ":platform",
-        ":randen_hwaes",
-        ":randen_hwaes_impl",  # build_cleaner: keep
-        "//absl/base:raw_logging_internal",
-        "//absl/strings:str_format",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "wide_multiply_test",
-    size = "small",
-    srcs = ["wide_multiply_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":wide_multiply",
-        "//absl/numeric:bits",
-        "//absl/numeric:int128",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "nanobenchmark",
-    srcs = ["nanobenchmark.cc"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    textual_hdrs = ["nanobenchmark.h"],
-    deps = [
-        ":platform",
-        ":randen_engine",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "uniform_helper",
-    hdrs = ["uniform_helper.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":traits",
-        "//absl/base:config",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "nanobenchmark_test",
-    size = "small",
-    srcs = ["nanobenchmark_test.cc"],
-    flaky = 1,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = [
-        "benchmark",
-        "no_test_ios_x86_64",
-        "no_test_loonix",  # Crashing.
-    ],
-    deps = [
-        ":nanobenchmark",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-    ],
-)
-
-cc_test(
-    name = "randen_benchmarks",
-    size = "medium",
-    timeout = "long",
-    srcs = ["randen_benchmarks.cc"],
-    copts = ABSL_TEST_COPTS + ABSL_RANDOM_RANDEN_COPTS,
-    flaky = 1,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ABSL_RANDOM_NONPORTABLE_TAGS + ["benchmark"],
-    deps = [
-        ":nanobenchmark",
-        ":platform",
-        ":randen",
-        ":randen_engine",
-        ":randen_hwaes",
-        ":randen_hwaes_impl",
-        ":randen_slow",
-        "//absl/base:raw_logging_internal",
-        "//absl/strings",
-    ],
-)
-
-cc_test(
-    name = "iostream_state_saver_test",
-    size = "small",
-    srcs = ["iostream_state_saver_test.cc"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":iostream_state_saver",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "uniform_helper_test",
-    size = "small",
-    srcs = ["uniform_helper_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":uniform_helper",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/random/internal/chi_square.cc b/third_party/abseil/absl/random/internal/chi_square.cc
deleted file mode 100644
index 640d48c..0000000
--- a/third_party/abseil/absl/random/internal/chi_square.cc
+++ /dev/null
@@ -1,232 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/chi_square.h"
-
-#include <cmath>
-
-#include "absl/random/internal/distribution_test_util.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-#if defined(__EMSCRIPTEN__)
-// Workaround __EMSCRIPTEN__ error: llvm_fma_f64 not found.
-inline double fma(double x, double y, double z) {
-  return (x * y) + z;
-}
-#endif
-
-// Use Horner's method to evaluate a polynomial.
-template <typename T, unsigned N>
-inline T EvaluatePolynomial(T x, const T (&poly)[N]) {
-#if !defined(__EMSCRIPTEN__)
-  using std::fma;
-#endif
-  T p = poly[N - 1];
-  for (unsigned i = 2; i <= N; i++) {
-    p = fma(p, x, poly[N - i]);
-  }
-  return p;
-}
-
-static constexpr int kLargeDOF = 150;
-
-// Returns the probability of a normal z-value.
-//
-// Adapted from the POZ function in:
-//     Ibbetson D, Algorithm 209
-//     Collected Algorithms of the CACM 1963 p. 616
-//
-double POZ(double z) {
-  static constexpr double kP1[] = {
-      0.797884560593,  -0.531923007300, 0.319152932694,
-      -0.151968751364, 0.059054035642,  -0.019198292004,
-      0.005198775019,  -0.001075204047, 0.000124818987,
-  };
-  static constexpr double kP2[] = {
-      0.999936657524,  0.000535310849,  -0.002141268741, 0.005353579108,
-      -0.009279453341, 0.011630447319,  -0.010557625006, 0.006549791214,
-      -0.002034254874, -0.000794620820, 0.001390604284,  -0.000676904986,
-      -0.000019538132, 0.000152529290,  -0.000045255659,
-  };
-
-  const double kZMax = 6.0;  // Maximum meaningful z-value.
-  if (z == 0.0) {
-    return 0.5;
-  }
-  double x;
-  double y = 0.5 * std::fabs(z);
-  if (y >= (kZMax * 0.5)) {
-    x = 1.0;
-  } else if (y < 1.0) {
-    double w = y * y;
-    x = EvaluatePolynomial(w, kP1) * y * 2.0;
-  } else {
-    y -= 2.0;
-    x = EvaluatePolynomial(y, kP2);
-  }
-  return z > 0.0 ? ((x + 1.0) * 0.5) : ((1.0 - x) * 0.5);
-}
-
-// Approximates the survival function of the normal distribution.
-//
-// Algorithm 26.2.18, from:
-// [Abramowitz and Stegun, Handbook of Mathematical Functions,p.932]
-// http://people.math.sfu.ca/~cbm/aands/abramowitz_and_stegun.pdf
-//
-double normal_survival(double z) {
-  // Maybe replace with the alternate formulation.
-  // 0.5 * erfc((x - mean)/(sqrt(2) * sigma))
-  static constexpr double kR[] = {
-      1.0, 0.196854, 0.115194, 0.000344, 0.019527,
-  };
-  double r = EvaluatePolynomial(z, kR);
-  r *= r;
-  return 0.5 / (r * r);
-}
-
-}  // namespace
-
-// Calculates the critical chi-square value given degrees-of-freedom and a
-// p-value, usually using bisection. Also known by the name CRITCHI.
-double ChiSquareValue(int dof, double p) {
-  static constexpr double kChiEpsilon =
-      0.000001;  // Accuracy of the approximation.
-  static constexpr double kChiMax =
-      99999.0;  // Maximum chi-squared value.
-
-  const double p_value = 1.0 - p;
-  if (dof < 1 || p_value > 1.0) {
-    return 0.0;
-  }
-
-  if (dof > kLargeDOF) {
-    // For large degrees of freedom, use the normal approximation by
-    //     Wilson, E. B. and Hilferty, M. M. (1931)
-    //                     chi^2 - mean
-    //                Z = --------------
-    //                        stddev
-    const double z = InverseNormalSurvival(p_value);
-    const double mean = 1 - 2.0 / (9 * dof);
-    const double variance = 2.0 / (9 * dof);
-    // Cannot use this method if the variance is 0.
-    if (variance != 0) {
-      return std::pow(z * std::sqrt(variance) + mean, 3.0) * dof;
-    }
-  }
-
-  if (p_value <= 0.0) return kChiMax;
-
-  // Otherwise search for the p value by bisection
-  double min_chisq = 0.0;
-  double max_chisq = kChiMax;
-  double current = dof / std::sqrt(p_value);
-  while ((max_chisq - min_chisq) > kChiEpsilon) {
-    if (ChiSquarePValue(current, dof) < p_value) {
-      max_chisq = current;
-    } else {
-      min_chisq = current;
-    }
-    current = (max_chisq + min_chisq) * 0.5;
-  }
-  return current;
-}
-
-// Calculates the p-value (probability) of a given chi-square value
-// and degrees of freedom.
-//
-// Adapted from the POCHISQ function from:
-//     Hill, I. D. and Pike, M. C.  Algorithm 299
-//     Collected Algorithms of the CACM 1963 p. 243
-//
-double ChiSquarePValue(double chi_square, int dof) {
-  static constexpr double kLogSqrtPi =
-      0.5723649429247000870717135;  // Log[Sqrt[Pi]]
-  static constexpr double kInverseSqrtPi =
-      0.5641895835477562869480795;  // 1/(Sqrt[Pi])
-
-  // For large degrees of freedom, use the normal approximation by
-  //     Wilson, E. B. and Hilferty, M. M. (1931)
-  // Via Wikipedia:
-  //   By the Central Limit Theorem, because the chi-square distribution is the
-  //   sum of k independent random variables with finite mean and variance, it
-  //   converges to a normal distribution for large k.
-  if (dof > kLargeDOF) {
-    // Re-scale everything.
-    const double chi_square_scaled = std::pow(chi_square / dof, 1.0 / 3);
-    const double mean = 1 - 2.0 / (9 * dof);
-    const double variance = 2.0 / (9 * dof);
-    // If variance is 0, this method cannot be used.
-    if (variance != 0) {
-      const double z = (chi_square_scaled - mean) / std::sqrt(variance);
-      if (z > 0) {
-        return normal_survival(z);
-      } else if (z < 0) {
-        return 1.0 - normal_survival(-z);
-      } else {
-        return 0.5;
-      }
-    }
-  }
-
-  // The chi square function is >= 0 for any degrees of freedom.
-  // In other words, probability that the chi square function >= 0 is 1.
-  if (chi_square <= 0.0) return 1.0;
-
-  // If the degrees of freedom is zero, the chi square function is always 0 by
-  // definition. In other words, the probability that the chi square function
-  // is > 0 is zero (chi square values <= 0 have been filtered above).
-  if (dof < 1) return 0;
-
-  auto capped_exp = [](double x) { return x < -20 ? 0.0 : std::exp(x); };
-  static constexpr double kBigX = 20;
-
-  double a = 0.5 * chi_square;
-  const bool even = !(dof & 1);  // True if dof is an even number.
-  const double y = capped_exp(-a);
-  double s = even ? y : (2.0 * POZ(-std::sqrt(chi_square)));
-
-  if (dof <= 2) {
-    return s;
-  }
-
-  chi_square = 0.5 * (dof - 1.0);
-  double z = (even ? 1.0 : 0.5);
-  if (a > kBigX) {
-    double e = (even ? 0.0 : kLogSqrtPi);
-    double c = std::log(a);
-    while (z <= chi_square) {
-      e = std::log(z) + e;
-      s += capped_exp(c * z - a - e);
-      z += 1.0;
-    }
-    return s;
-  }
-
-  double e = (even ? 1.0 : (kInverseSqrtPi / std::sqrt(a)));
-  double c = 0.0;
-  while (z <= chi_square) {
-    e = e * (a / z);
-    c = c + e;
-    z += 1.0;
-  }
-  return c * y + s;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/chi_square.h b/third_party/abseil/absl/random/internal/chi_square.h
deleted file mode 100644
index 07f4fbe..0000000
--- a/third_party/abseil/absl/random/internal/chi_square.h
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_CHI_SQUARE_H_
-#define ABSL_RANDOM_INTERNAL_CHI_SQUARE_H_
-
-// The chi-square statistic.
-//
-// Useful for evaluating if `D` independent random variables are behaving as
-// expected, or if two distributions are similar.  (`D` is the degrees of
-// freedom).
-//
-// Each bucket should have an expected count of 10 or more for the chi square to
-// be meaningful.
-
-#include <cassert>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-constexpr const char kChiSquared[] = "chi-squared";
-
-// Returns the measured chi square value, using a single expected value.  This
-// assumes that the values in [begin, end) are uniformly distributed.
-template <typename Iterator>
-double ChiSquareWithExpected(Iterator begin, Iterator end, double expected) {
-  // Compute the sum and the number of buckets.
-  assert(expected >= 10);  // require at least 10 samples per bucket.
-  double chi_square = 0;
-  for (auto it = begin; it != end; it++) {
-    double d = static_cast<double>(*it) - expected;
-    chi_square += d * d;
-  }
-  chi_square = chi_square / expected;
-  return chi_square;
-}
-
-// Returns the measured chi square value, taking the actual value of each bucket
-// from the first set of iterators, and the expected value of each bucket from
-// the second set of iterators.
-template <typename Iterator, typename Expected>
-double ChiSquare(Iterator it, Iterator end, Expected eit, Expected eend) {
-  double chi_square = 0;
-  for (; it != end && eit != eend; ++it, ++eit) {
-    if (*it > 0) {
-      assert(*eit > 0);
-    }
-    double e = static_cast<double>(*eit);
-    double d = static_cast<double>(*it - *eit);
-    if (d != 0) {
-      assert(e > 0);
-      chi_square += (d * d) / e;
-    }
-  }
-  assert(it == end && eit == eend);
-  return chi_square;
-}
-
-// ======================================================================
-// The following methods can be used for an arbitrary significance level.
-//
-
-// Calculates critical chi-square values to produce the given p-value using a
-// bisection search for a value within epsilon, relying on the monotonicity of
-// ChiSquarePValue().
-double ChiSquareValue(int dof, double p);
-
-// Calculates the p-value (probability) of a given chi-square value.
-double ChiSquarePValue(double chi_square, int dof);
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_CHI_SQUARE_H_
diff --git a/third_party/abseil/absl/random/internal/chi_square_test.cc b/third_party/abseil/absl/random/internal/chi_square_test.cc
deleted file mode 100644
index 5025def..0000000
--- a/third_party/abseil/absl/random/internal/chi_square_test.cc
+++ /dev/null
@@ -1,365 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/chi_square.h"
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <numeric>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/macros.h"
-
-using absl::random_internal::ChiSquare;
-using absl::random_internal::ChiSquarePValue;
-using absl::random_internal::ChiSquareValue;
-using absl::random_internal::ChiSquareWithExpected;
-
-namespace {
-
-TEST(ChiSquare, Value) {
-  struct {
-    int line;
-    double chi_square;
-    int df;
-    double confidence;
-  } const specs[] = {
-      // Testing lookup at 1% confidence
-      {__LINE__, 0, 0, 0.01},
-      {__LINE__, 0.00016, 1, 0.01},
-      {__LINE__, 1.64650, 8, 0.01},
-      {__LINE__, 5.81221, 16, 0.01},
-      {__LINE__, 156.4319, 200, 0.01},
-      {__LINE__, 1121.3784, 1234, 0.01},
-      {__LINE__, 53557.1629, 54321, 0.01},
-      {__LINE__, 651662.6647, 654321, 0.01},
-
-      // Testing lookup at 99% confidence
-      {__LINE__, 0, 0, 0.99},
-      {__LINE__, 6.635, 1, 0.99},
-      {__LINE__, 20.090, 8, 0.99},
-      {__LINE__, 32.000, 16, 0.99},
-      {__LINE__, 249.4456, 200, 0.99},
-      {__LINE__, 1131.1573, 1023, 0.99},
-      {__LINE__, 1352.5038, 1234, 0.99},
-      {__LINE__, 55090.7356, 54321, 0.99},
-      {__LINE__, 656985.1514, 654321, 0.99},
-
-      // Testing lookup at 99.9% confidence
-      {__LINE__, 16.2659, 3, 0.999},
-      {__LINE__, 22.4580, 6, 0.999},
-      {__LINE__, 267.5409, 200, 0.999},
-      {__LINE__, 1168.5033, 1023, 0.999},
-      {__LINE__, 55345.1741, 54321, 0.999},
-      {__LINE__, 657861.7284, 654321, 0.999},
-      {__LINE__, 51.1772, 24, 0.999},
-      {__LINE__, 59.7003, 30, 0.999},
-      {__LINE__, 37.6984, 15, 0.999},
-      {__LINE__, 29.5898, 10, 0.999},
-      {__LINE__, 27.8776, 9, 0.999},
-
-      // Testing lookup at random confidences
-      {__LINE__, 0.000157088, 1, 0.01},
-      {__LINE__, 5.31852, 2, 0.93},
-      {__LINE__, 1.92256, 4, 0.25},
-      {__LINE__, 10.7709, 13, 0.37},
-      {__LINE__, 26.2514, 17, 0.93},
-      {__LINE__, 36.4799, 29, 0.84},
-      {__LINE__, 25.818, 31, 0.27},
-      {__LINE__, 63.3346, 64, 0.50},
-      {__LINE__, 196.211, 128, 0.9999},
-      {__LINE__, 215.21, 243, 0.10},
-      {__LINE__, 285.393, 256, 0.90},
-      {__LINE__, 984.504, 1024, 0.1923},
-      {__LINE__, 2043.85, 2048, 0.4783},
-      {__LINE__, 48004.6, 48273, 0.194},
-  };
-  for (const auto& spec : specs) {
-    SCOPED_TRACE(spec.line);
-    // Verify all values are have at most a 1% relative error.
-    const double val = ChiSquareValue(spec.df, spec.confidence);
-    const double err = std::max(5e-6, spec.chi_square / 5e3);  // 1 part in 5000
-    EXPECT_NEAR(spec.chi_square, val, err) << spec.line;
-  }
-
-  // Relaxed test for extreme values, from
-  //  http://www.ciphersbyritter.com/JAVASCRP/NORMCHIK.HTM#ChiSquare
-  EXPECT_NEAR(49.2680, ChiSquareValue(100, 1e-6), 5);  // 0.000'005 mark
-  EXPECT_NEAR(123.499, ChiSquareValue(200, 1e-6), 5);  // 0.000'005 mark
-
-  EXPECT_NEAR(149.449, ChiSquareValue(100, 0.999), 0.01);
-  EXPECT_NEAR(161.318, ChiSquareValue(100, 0.9999), 0.01);
-  EXPECT_NEAR(172.098, ChiSquareValue(100, 0.99999), 0.01);
-
-  EXPECT_NEAR(381.426, ChiSquareValue(300, 0.999), 0.05);
-  EXPECT_NEAR(399.756, ChiSquareValue(300, 0.9999), 0.1);
-  EXPECT_NEAR(416.126, ChiSquareValue(300, 0.99999), 0.2);
-}
-
-TEST(ChiSquareTest, PValue) {
-  struct {
-    int line;
-    double pval;
-    double chi_square;
-    int df;
-  } static const specs[] = {
-      {__LINE__, 1, 0, 0},
-      {__LINE__, 0, 0.001, 0},
-      {__LINE__, 1.000, 0, 453},
-      {__LINE__, 0.134471, 7972.52, 7834},
-      {__LINE__, 0.203922, 28.32, 23},
-      {__LINE__, 0.737171, 48274, 48472},
-      {__LINE__, 0.444146, 583.1234, 579},
-      {__LINE__, 0.294814, 138.2, 130},
-      {__LINE__, 0.0816532, 12.63, 7},
-      {__LINE__, 0, 682.32, 67},
-      {__LINE__, 0.49405, 999, 999},
-      {__LINE__, 1.000, 0, 9999},
-      {__LINE__, 0.997477, 0.00001, 1},
-      {__LINE__, 0, 5823.21, 5040},
-  };
-  for (const auto& spec : specs) {
-    SCOPED_TRACE(spec.line);
-    const double pval = ChiSquarePValue(spec.chi_square, spec.df);
-    EXPECT_NEAR(spec.pval, pval, 1e-3);
-  }
-}
-
-TEST(ChiSquareTest, CalcChiSquare) {
-  struct {
-    int line;
-    std::vector<int> expected;
-    std::vector<int> actual;
-  } const specs[] = {
-      {__LINE__,
-       {56, 234, 76, 1, 546, 1, 87, 345, 1, 234},
-       {2, 132, 4, 43, 234, 8, 345, 8, 236, 56}},
-      {__LINE__,
-       {123, 36, 234, 367, 345, 2, 456, 567, 234, 567},
-       {123, 56, 2345, 8, 345, 8, 2345, 23, 48, 267}},
-      {__LINE__,
-       {123, 234, 345, 456, 567, 678, 789, 890, 98, 76},
-       {123, 234, 345, 456, 567, 678, 789, 890, 98, 76}},
-      {__LINE__, {3, 675, 23, 86, 2, 8, 2}, {456, 675, 23, 86, 23, 65, 2}},
-      {__LINE__, {1}, {23}},
-  };
-  for (const auto& spec : specs) {
-    SCOPED_TRACE(spec.line);
-    double chi_square = 0;
-    for (int i = 0; i < spec.expected.size(); ++i) {
-      const double diff = spec.actual[i] - spec.expected[i];
-      chi_square += (diff * diff) / spec.expected[i];
-    }
-    EXPECT_NEAR(chi_square,
-                ChiSquare(std::begin(spec.actual), std::end(spec.actual),
-                          std::begin(spec.expected), std::end(spec.expected)),
-                1e-5);
-  }
-}
-
-TEST(ChiSquareTest, CalcChiSquareInt64) {
-  const int64_t data[3] = {910293487, 910292491, 910216780};
-  // $ python -c "import scipy.stats
-  // > print scipy.stats.chisquare([910293487, 910292491, 910216780])[0]"
-  // 4.25410123524
-  double sum = std::accumulate(std::begin(data), std::end(data), double{0});
-  size_t n = std::distance(std::begin(data), std::end(data));
-  double a = ChiSquareWithExpected(std::begin(data), std::end(data), sum / n);
-  EXPECT_NEAR(4.254101, a, 1e-6);
-
-  // ... Or with known values.
-  double b =
-      ChiSquareWithExpected(std::begin(data), std::end(data), 910267586.0);
-  EXPECT_NEAR(4.254101, b, 1e-6);
-}
-
-TEST(ChiSquareTest, TableData) {
-  // Test data from
-  // http://www.itl.nist.gov/div898/handbook/eda/section3/eda3674.htm
-  //    0.90      0.95     0.975      0.99     0.999
-  const double data[100][5] = {
-      /* 1*/ {2.706, 3.841, 5.024, 6.635, 10.828},
-      /* 2*/ {4.605, 5.991, 7.378, 9.210, 13.816},
-      /* 3*/ {6.251, 7.815, 9.348, 11.345, 16.266},
-      /* 4*/ {7.779, 9.488, 11.143, 13.277, 18.467},
-      /* 5*/ {9.236, 11.070, 12.833, 15.086, 20.515},
-      /* 6*/ {10.645, 12.592, 14.449, 16.812, 22.458},
-      /* 7*/ {12.017, 14.067, 16.013, 18.475, 24.322},
-      /* 8*/ {13.362, 15.507, 17.535, 20.090, 26.125},
-      /* 9*/ {14.684, 16.919, 19.023, 21.666, 27.877},
-      /*10*/ {15.987, 18.307, 20.483, 23.209, 29.588},
-      /*11*/ {17.275, 19.675, 21.920, 24.725, 31.264},
-      /*12*/ {18.549, 21.026, 23.337, 26.217, 32.910},
-      /*13*/ {19.812, 22.362, 24.736, 27.688, 34.528},
-      /*14*/ {21.064, 23.685, 26.119, 29.141, 36.123},
-      /*15*/ {22.307, 24.996, 27.488, 30.578, 37.697},
-      /*16*/ {23.542, 26.296, 28.845, 32.000, 39.252},
-      /*17*/ {24.769, 27.587, 30.191, 33.409, 40.790},
-      /*18*/ {25.989, 28.869, 31.526, 34.805, 42.312},
-      /*19*/ {27.204, 30.144, 32.852, 36.191, 43.820},
-      /*20*/ {28.412, 31.410, 34.170, 37.566, 45.315},
-      /*21*/ {29.615, 32.671, 35.479, 38.932, 46.797},
-      /*22*/ {30.813, 33.924, 36.781, 40.289, 48.268},
-      /*23*/ {32.007, 35.172, 38.076, 41.638, 49.728},
-      /*24*/ {33.196, 36.415, 39.364, 42.980, 51.179},
-      /*25*/ {34.382, 37.652, 40.646, 44.314, 52.620},
-      /*26*/ {35.563, 38.885, 41.923, 45.642, 54.052},
-      /*27*/ {36.741, 40.113, 43.195, 46.963, 55.476},
-      /*28*/ {37.916, 41.337, 44.461, 48.278, 56.892},
-      /*29*/ {39.087, 42.557, 45.722, 49.588, 58.301},
-      /*30*/ {40.256, 43.773, 46.979, 50.892, 59.703},
-      /*31*/ {41.422, 44.985, 48.232, 52.191, 61.098},
-      /*32*/ {42.585, 46.194, 49.480, 53.486, 62.487},
-      /*33*/ {43.745, 47.400, 50.725, 54.776, 63.870},
-      /*34*/ {44.903, 48.602, 51.966, 56.061, 65.247},
-      /*35*/ {46.059, 49.802, 53.203, 57.342, 66.619},
-      /*36*/ {47.212, 50.998, 54.437, 58.619, 67.985},
-      /*37*/ {48.363, 52.192, 55.668, 59.893, 69.347},
-      /*38*/ {49.513, 53.384, 56.896, 61.162, 70.703},
-      /*39*/ {50.660, 54.572, 58.120, 62.428, 72.055},
-      /*40*/ {51.805, 55.758, 59.342, 63.691, 73.402},
-      /*41*/ {52.949, 56.942, 60.561, 64.950, 74.745},
-      /*42*/ {54.090, 58.124, 61.777, 66.206, 76.084},
-      /*43*/ {55.230, 59.304, 62.990, 67.459, 77.419},
-      /*44*/ {56.369, 60.481, 64.201, 68.710, 78.750},
-      /*45*/ {57.505, 61.656, 65.410, 69.957, 80.077},
-      /*46*/ {58.641, 62.830, 66.617, 71.201, 81.400},
-      /*47*/ {59.774, 64.001, 67.821, 72.443, 82.720},
-      /*48*/ {60.907, 65.171, 69.023, 73.683, 84.037},
-      /*49*/ {62.038, 66.339, 70.222, 74.919, 85.351},
-      /*50*/ {63.167, 67.505, 71.420, 76.154, 86.661},
-      /*51*/ {64.295, 68.669, 72.616, 77.386, 87.968},
-      /*52*/ {65.422, 69.832, 73.810, 78.616, 89.272},
-      /*53*/ {66.548, 70.993, 75.002, 79.843, 90.573},
-      /*54*/ {67.673, 72.153, 76.192, 81.069, 91.872},
-      /*55*/ {68.796, 73.311, 77.380, 82.292, 93.168},
-      /*56*/ {69.919, 74.468, 78.567, 83.513, 94.461},
-      /*57*/ {71.040, 75.624, 79.752, 84.733, 95.751},
-      /*58*/ {72.160, 76.778, 80.936, 85.950, 97.039},
-      /*59*/ {73.279, 77.931, 82.117, 87.166, 98.324},
-      /*60*/ {74.397, 79.082, 83.298, 88.379, 99.607},
-      /*61*/ {75.514, 80.232, 84.476, 89.591, 100.888},
-      /*62*/ {76.630, 81.381, 85.654, 90.802, 102.166},
-      /*63*/ {77.745, 82.529, 86.830, 92.010, 103.442},
-      /*64*/ {78.860, 83.675, 88.004, 93.217, 104.716},
-      /*65*/ {79.973, 84.821, 89.177, 94.422, 105.988},
-      /*66*/ {81.085, 85.965, 90.349, 95.626, 107.258},
-      /*67*/ {82.197, 87.108, 91.519, 96.828, 108.526},
-      /*68*/ {83.308, 88.250, 92.689, 98.028, 109.791},
-      /*69*/ {84.418, 89.391, 93.856, 99.228, 111.055},
-      /*70*/ {85.527, 90.531, 95.023, 100.425, 112.317},
-      /*71*/ {86.635, 91.670, 96.189, 101.621, 113.577},
-      /*72*/ {87.743, 92.808, 97.353, 102.816, 114.835},
-      /*73*/ {88.850, 93.945, 98.516, 104.010, 116.092},
-      /*74*/ {89.956, 95.081, 99.678, 105.202, 117.346},
-      /*75*/ {91.061, 96.217, 100.839, 106.393, 118.599},
-      /*76*/ {92.166, 97.351, 101.999, 107.583, 119.850},
-      /*77*/ {93.270, 98.484, 103.158, 108.771, 121.100},
-      /*78*/ {94.374, 99.617, 104.316, 109.958, 122.348},
-      /*79*/ {95.476, 100.749, 105.473, 111.144, 123.594},
-      /*80*/ {96.578, 101.879, 106.629, 112.329, 124.839},
-      /*81*/ {97.680, 103.010, 107.783, 113.512, 126.083},
-      /*82*/ {98.780, 104.139, 108.937, 114.695, 127.324},
-      /*83*/ {99.880, 105.267, 110.090, 115.876, 128.565},
-      /*84*/ {100.980, 106.395, 111.242, 117.057, 129.804},
-      /*85*/ {102.079, 107.522, 112.393, 118.236, 131.041},
-      /*86*/ {103.177, 108.648, 113.544, 119.414, 132.277},
-      /*87*/ {104.275, 109.773, 114.693, 120.591, 133.512},
-      /*88*/ {105.372, 110.898, 115.841, 121.767, 134.746},
-      /*89*/ {106.469, 112.022, 116.989, 122.942, 135.978},
-      /*90*/ {107.565, 113.145, 118.136, 124.116, 137.208},
-      /*91*/ {108.661, 114.268, 119.282, 125.289, 138.438},
-      /*92*/ {109.756, 115.390, 120.427, 126.462, 139.666},
-      /*93*/ {110.850, 116.511, 121.571, 127.633, 140.893},
-      /*94*/ {111.944, 117.632, 122.715, 128.803, 142.119},
-      /*95*/ {113.038, 118.752, 123.858, 129.973, 143.344},
-      /*96*/ {114.131, 119.871, 125.000, 131.141, 144.567},
-      /*97*/ {115.223, 120.990, 126.141, 132.309, 145.789},
-      /*98*/ {116.315, 122.108, 127.282, 133.476, 147.010},
-      /*99*/ {117.407, 123.225, 128.422, 134.642, 148.230},
-      /*100*/ {118.498, 124.342, 129.561, 135.807, 149.449}
-      /**/};
-
-  //    0.90      0.95     0.975      0.99     0.999
-  for (int i = 0; i < ABSL_ARRAYSIZE(data); i++) {
-    const double E = 0.0001;
-    EXPECT_NEAR(ChiSquarePValue(data[i][0], i + 1), 0.10, E)
-        << i << " " << data[i][0];
-    EXPECT_NEAR(ChiSquarePValue(data[i][1], i + 1), 0.05, E)
-        << i << " " << data[i][1];
-    EXPECT_NEAR(ChiSquarePValue(data[i][2], i + 1), 0.025, E)
-        << i << " " << data[i][2];
-    EXPECT_NEAR(ChiSquarePValue(data[i][3], i + 1), 0.01, E)
-        << i << " " << data[i][3];
-    EXPECT_NEAR(ChiSquarePValue(data[i][4], i + 1), 0.001, E)
-        << i << " " << data[i][4];
-
-    const double F = 0.1;
-    EXPECT_NEAR(ChiSquareValue(i + 1, 0.90), data[i][0], F) << i;
-    EXPECT_NEAR(ChiSquareValue(i + 1, 0.95), data[i][1], F) << i;
-    EXPECT_NEAR(ChiSquareValue(i + 1, 0.975), data[i][2], F) << i;
-    EXPECT_NEAR(ChiSquareValue(i + 1, 0.99), data[i][3], F) << i;
-    EXPECT_NEAR(ChiSquareValue(i + 1, 0.999), data[i][4], F) << i;
-  }
-}
-
-TEST(ChiSquareTest, ChiSquareTwoIterator) {
-  // Test data from http://www.stat.yale.edu/Courses/1997-98/101/chigf.htm
-  // Null-hypothesis: This data is normally distributed.
-  const int counts[10] = {6, 6, 18, 33, 38, 38, 28, 21, 9, 3};
-  const double expected[10] = {4.6,  8.8,  18.4, 30.0, 38.2,
-                               38.2, 30.0, 18.4, 8.8,  4.6};
-  double chi_square = ChiSquare(std::begin(counts), std::end(counts),
-                                std::begin(expected), std::end(expected));
-  EXPECT_NEAR(chi_square, 2.69, 0.001);
-
-  // Degrees of freedom: 10 bins. two estimated parameters. = 10 - 2 - 1.
-  const int dof = 7;
-  // The critical value of 7, 95% => 14.067 (see above test)
-  double p_value_05 = ChiSquarePValue(14.067, dof);
-  EXPECT_NEAR(p_value_05, 0.05, 0.001);  // 95%-ile p-value
-
-  double p_actual = ChiSquarePValue(chi_square, dof);
-  EXPECT_GT(p_actual, 0.05);  // Accept the null hypothesis.
-}
-
-TEST(ChiSquareTest, DiceRolls) {
-  // Assume we are testing 102 fair dice rolls.
-  // Null-hypothesis: This data is fairly distributed.
-  //
-  // The dof value of 4, @95% = 9.488 (see above test)
-  // The dof value of 5, @95% = 11.070
-  const int rolls[6] = {22, 11, 17, 14, 20, 18};
-  double sum = std::accumulate(std::begin(rolls), std::end(rolls), double{0});
-  size_t n = std::distance(std::begin(rolls), std::end(rolls));
-
-  double a = ChiSquareWithExpected(std::begin(rolls), std::end(rolls), sum / n);
-  EXPECT_NEAR(a, 4.70588, 1e-5);
-  EXPECT_LT(a, ChiSquareValue(4, 0.95));
-
-  double p_a = ChiSquarePValue(a, 4);
-  EXPECT_NEAR(p_a, 0.318828, 1e-5);  // Accept the null hypothesis.
-
-  double b = ChiSquareWithExpected(std::begin(rolls), std::end(rolls), 17.0);
-  EXPECT_NEAR(b, 4.70588, 1e-5);
-  EXPECT_LT(b, ChiSquareValue(5, 0.95));
-
-  double p_b = ChiSquarePValue(b, 5);
-  EXPECT_NEAR(p_b, 0.4528180, 1e-5);  // Accept the null hypothesis.
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/distribution_caller.h b/third_party/abseil/absl/random/internal/distribution_caller.h
deleted file mode 100644
index fc81b78..0000000
--- a/third_party/abseil/absl/random/internal/distribution_caller.h
+++ /dev/null
@@ -1,92 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_
-#define ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_
-
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// DistributionCaller provides an opportunity to overload the general
-// mechanism for calling a distribution, allowing for mock-RNG classes
-// to intercept such calls.
-template <typename URBG>
-struct DistributionCaller {
-  // SFINAE to detect whether the URBG type includes a member matching
-  // bool InvokeMock(base_internal::FastTypeIdType, void*, void*).
-  //
-  // These live inside BitGenRef so that they have friend access
-  // to MockingBitGen. (see similar methods in DistributionCaller).
-  template <template <class...> class Trait, class AlwaysVoid, class... Args>
-  struct detector : std::false_type {};
-  template <template <class...> class Trait, class... Args>
-  struct detector<Trait, absl::void_t<Trait<Args...>>, Args...>
-      : std::true_type {};
-
-  template <class T>
-  using invoke_mock_t = decltype(std::declval<T*>()->InvokeMock(
-      std::declval<::absl::base_internal::FastTypeIdType>(),
-      std::declval<void*>(), std::declval<void*>()));
-
-  using HasInvokeMock = typename detector<invoke_mock_t, void, URBG>::type;
-
-  // Default implementation of distribution caller.
-  template <typename DistrT, typename... Args>
-  static typename DistrT::result_type Impl(std::false_type, URBG* urbg,
-                                           Args&&... args) {
-    DistrT dist(std::forward<Args>(args)...);
-    return dist(*urbg);
-  }
-
-  // Mock implementation of distribution caller.
-  // The underlying KeyT must match the KeyT constructed by MockOverloadSet.
-  template <typename DistrT, typename... Args>
-  static typename DistrT::result_type Impl(std::true_type, URBG* urbg,
-                                           Args&&... args) {
-    using ResultT = typename DistrT::result_type;
-    using ArgTupleT = std::tuple<absl::decay_t<Args>...>;
-    using KeyT = ResultT(DistrT, ArgTupleT);
-
-    ArgTupleT arg_tuple(std::forward<Args>(args)...);
-    ResultT result;
-    if (!urbg->InvokeMock(::absl::base_internal::FastTypeId<KeyT>(), &arg_tuple,
-                          &result)) {
-      auto dist = absl::make_from_tuple<DistrT>(arg_tuple);
-      result = dist(*urbg);
-    }
-    return result;
-  }
-
-  // Default implementation of distribution caller.
-  template <typename DistrT, typename... Args>
-  static typename DistrT::result_type Call(URBG* urbg, Args&&... args) {
-    return Impl<DistrT, Args...>(HasInvokeMock{}, urbg,
-                                 std::forward<Args>(args)...);
-  }
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_
diff --git a/third_party/abseil/absl/random/internal/distribution_test_util.cc b/third_party/abseil/absl/random/internal/distribution_test_util.cc
deleted file mode 100644
index e900565..0000000
--- a/third_party/abseil/absl/random/internal/distribution_test_util.cc
+++ /dev/null
@@ -1,418 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/distribution_test_util.h"
-
-#include <cassert>
-#include <cmath>
-#include <string>
-#include <vector>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-#if defined(__EMSCRIPTEN__)
-// Workaround __EMSCRIPTEN__ error: llvm_fma_f64 not found.
-inline double fma(double x, double y, double z) { return (x * y) + z; }
-#endif
-
-}  // namespace
-
-DistributionMoments ComputeDistributionMoments(
-    absl::Span<const double> data_points) {
-  DistributionMoments result;
-
-  // Compute m1
-  for (double x : data_points) {
-    result.n++;
-    result.mean += x;
-  }
-  result.mean /= static_cast<double>(result.n);
-
-  // Compute m2, m3, m4
-  for (double x : data_points) {
-    double v = x - result.mean;
-    result.variance += v * v;
-    result.skewness += v * v * v;
-    result.kurtosis += v * v * v * v;
-  }
-  result.variance /= static_cast<double>(result.n - 1);
-
-  result.skewness /= static_cast<double>(result.n);
-  result.skewness /= std::pow(result.variance, 1.5);
-
-  result.kurtosis /= static_cast<double>(result.n);
-  result.kurtosis /= std::pow(result.variance, 2.0);
-  return result;
-
-  // When validating the min/max count, the following confidence intervals may
-  // be of use:
-  // 3.291 * stddev = 99.9% CI
-  // 2.576 * stddev = 99% CI
-  // 1.96 * stddev  = 95% CI
-  // 1.65 * stddev  = 90% CI
-}
-
-std::ostream& operator<<(std::ostream& os, const DistributionMoments& moments) {
-  return os << absl::StrFormat("mean=%f, stddev=%f, skewness=%f, kurtosis=%f",
-                               moments.mean, std::sqrt(moments.variance),
-                               moments.skewness, moments.kurtosis);
-}
-
-double InverseNormalSurvival(double x) {
-  // inv_sf(u) = -sqrt(2) * erfinv(2u-1)
-  static constexpr double kSqrt2 = 1.4142135623730950488;
-  return -kSqrt2 * absl::random_internal::erfinv(2 * x - 1.0);
-}
-
-bool Near(absl::string_view msg, double actual, double expected, double bound) {
-  assert(bound > 0.0);
-  double delta = fabs(expected - actual);
-  if (delta < bound) {
-    return true;
-  }
-
-  std::string formatted = absl::StrCat(
-      msg, " actual=", actual, " expected=", expected, " err=", delta / bound);
-  ABSL_RAW_LOG(INFO, "%s", formatted.c_str());
-  return false;
-}
-
-// TODO(absl-team): Replace with an "ABSL_HAVE_SPECIAL_MATH" and try
-// to use std::beta().  As of this writing P0226R1 is not implemented
-// in libc++: http://libcxx.llvm.org/cxx1z_status.html
-double beta(double p, double q) {
-  // Beta(x, y) = Gamma(x) * Gamma(y) / Gamma(x+y)
-  double lbeta = std::lgamma(p) + std::lgamma(q) - std::lgamma(p + q);
-  return std::exp(lbeta);
-}
-
-// Approximation to inverse of the Error Function in double precision.
-// (http://people.maths.ox.ac.uk/gilesm/files/gems_erfinv.pdf)
-double erfinv(double x) {
-#if !defined(__EMSCRIPTEN__)
-  using std::fma;
-#endif
-
-  double w = 0.0;
-  double p = 0.0;
-  w = -std::log((1.0 - x) * (1.0 + x));
-  if (w < 6.250000) {
-    w = w - 3.125000;
-    p = -3.6444120640178196996e-21;
-    p = fma(p, w, -1.685059138182016589e-19);
-    p = fma(p, w, 1.2858480715256400167e-18);
-    p = fma(p, w, 1.115787767802518096e-17);
-    p = fma(p, w, -1.333171662854620906e-16);
-    p = fma(p, w, 2.0972767875968561637e-17);
-    p = fma(p, w, 6.6376381343583238325e-15);
-    p = fma(p, w, -4.0545662729752068639e-14);
-    p = fma(p, w, -8.1519341976054721522e-14);
-    p = fma(p, w, 2.6335093153082322977e-12);
-    p = fma(p, w, -1.2975133253453532498e-11);
-    p = fma(p, w, -5.4154120542946279317e-11);
-    p = fma(p, w, 1.051212273321532285e-09);
-    p = fma(p, w, -4.1126339803469836976e-09);
-    p = fma(p, w, -2.9070369957882005086e-08);
-    p = fma(p, w, 4.2347877827932403518e-07);
-    p = fma(p, w, -1.3654692000834678645e-06);
-    p = fma(p, w, -1.3882523362786468719e-05);
-    p = fma(p, w, 0.0001867342080340571352);
-    p = fma(p, w, -0.00074070253416626697512);
-    p = fma(p, w, -0.0060336708714301490533);
-    p = fma(p, w, 0.24015818242558961693);
-    p = fma(p, w, 1.6536545626831027356);
-  } else if (w < 16.000000) {
-    w = std::sqrt(w) - 3.250000;
-    p = 2.2137376921775787049e-09;
-    p = fma(p, w, 9.0756561938885390979e-08);
-    p = fma(p, w, -2.7517406297064545428e-07);
-    p = fma(p, w, 1.8239629214389227755e-08);
-    p = fma(p, w, 1.5027403968909827627e-06);
-    p = fma(p, w, -4.013867526981545969e-06);
-    p = fma(p, w, 2.9234449089955446044e-06);
-    p = fma(p, w, 1.2475304481671778723e-05);
-    p = fma(p, w, -4.7318229009055733981e-05);
-    p = fma(p, w, 6.8284851459573175448e-05);
-    p = fma(p, w, 2.4031110387097893999e-05);
-    p = fma(p, w, -0.0003550375203628474796);
-    p = fma(p, w, 0.00095328937973738049703);
-    p = fma(p, w, -0.0016882755560235047313);
-    p = fma(p, w, 0.0024914420961078508066);
-    p = fma(p, w, -0.0037512085075692412107);
-    p = fma(p, w, 0.005370914553590063617);
-    p = fma(p, w, 1.0052589676941592334);
-    p = fma(p, w, 3.0838856104922207635);
-  } else {
-    w = std::sqrt(w) - 5.000000;
-    p = -2.7109920616438573243e-11;
-    p = fma(p, w, -2.5556418169965252055e-10);
-    p = fma(p, w, 1.5076572693500548083e-09);
-    p = fma(p, w, -3.7894654401267369937e-09);
-    p = fma(p, w, 7.6157012080783393804e-09);
-    p = fma(p, w, -1.4960026627149240478e-08);
-    p = fma(p, w, 2.9147953450901080826e-08);
-    p = fma(p, w, -6.7711997758452339498e-08);
-    p = fma(p, w, 2.2900482228026654717e-07);
-    p = fma(p, w, -9.9298272942317002539e-07);
-    p = fma(p, w, 4.5260625972231537039e-06);
-    p = fma(p, w, -1.9681778105531670567e-05);
-    p = fma(p, w, 7.5995277030017761139e-05);
-    p = fma(p, w, -0.00021503011930044477347);
-    p = fma(p, w, -0.00013871931833623122026);
-    p = fma(p, w, 1.0103004648645343977);
-    p = fma(p, w, 4.8499064014085844221);
-  }
-  return p * x;
-}
-
-namespace {
-
-// Direct implementation of AS63, BETAIN()
-// https://www.jstor.org/stable/2346797?seq=3#page_scan_tab_contents.
-//
-// BETAIN(x, p, q, beta)
-//  x:     the value of the upper limit x.
-//  p:     the value of the parameter p.
-//  q:     the value of the parameter q.
-//  beta:  the value of ln B(p, q)
-//
-double BetaIncompleteImpl(const double x, const double p, const double q,
-                          const double beta) {
-  if (p < (p + q) * x) {
-    // Incomplete beta function is symmetrical, so return the complement.
-    return 1. - BetaIncompleteImpl(1.0 - x, q, p, beta);
-  }
-
-  double psq = p + q;
-  const double kErr = 1e-14;
-  const double xc = 1. - x;
-  const double pre =
-      std::exp(p * std::log(x) + (q - 1.) * std::log(xc) - beta) / p;
-
-  double term = 1.;
-  double ai = 1.;
-  double result = 1.;
-  int ns = static_cast<int>(q + xc * psq);
-
-  // Use the soper reduction forumla.
-  double rx = (ns == 0) ? x : x / xc;
-  double temp = q - ai;
-  for (;;) {
-    term = term * temp * rx / (p + ai);
-    result = result + term;
-    temp = std::fabs(term);
-    if (temp < kErr && temp < kErr * result) {
-      return result * pre;
-    }
-    ai = ai + 1.;
-    --ns;
-    if (ns >= 0) {
-      temp = q - ai;
-      if (ns == 0) {
-        rx = x;
-      }
-    } else {
-      temp = psq;
-      psq = psq + 1.;
-    }
-  }
-
-  // NOTE: See also TOMS Alogrithm 708.
-  // http://www.netlib.org/toms/index.html
-  //
-  // NOTE: The NWSC library also includes BRATIO / ISUBX (p87)
-  // https://archive.org/details/DTIC_ADA261511/page/n75
-}
-
-// Direct implementation of AS109, XINBTA(p, q, beta, alpha)
-// https://www.jstor.org/stable/2346798?read-now=1&seq=4#page_scan_tab_contents
-// https://www.jstor.org/stable/2346887?seq=1#page_scan_tab_contents
-//
-// XINBTA(p, q, beta, alhpa)
-//  p:     the value of the parameter p.
-//  q:     the value of the parameter q.
-//  beta:  the value of ln B(p, q)
-//  alpha: the value of the lower tail area.
-//
-double BetaIncompleteInvImpl(const double p, const double q, const double beta,
-                             const double alpha) {
-  if (alpha < 0.5) {
-    // Inverse Incomplete beta function is symmetrical, return the complement.
-    return 1. - BetaIncompleteInvImpl(q, p, beta, 1. - alpha);
-  }
-  const double kErr = 1e-14;
-  double value = kErr;
-
-  // Compute the initial estimate.
-  {
-    double r = std::sqrt(-std::log(alpha * alpha));
-    double y =
-        r - fma(r, 0.27061, 2.30753) / fma(r, fma(r, 0.04481, 0.99229), 1.0);
-    if (p > 1. && q > 1.) {
-      r = (y * y - 3.) / 6.;
-      double s = 1. / (p + p - 1.);
-      double t = 1. / (q + q - 1.);
-      double h = 2. / s + t;
-      double w =
-          y * std::sqrt(h + r) / h - (t - s) * (r + 5. / 6. - t / (3. * h));
-      value = p / (p + q * std::exp(w + w));
-    } else {
-      r = q + q;
-      double t = 1.0 / (9. * q);
-      double u = 1.0 - t + y * std::sqrt(t);
-      t = r * (u * u * u);
-      if (t <= 0) {
-        value = 1.0 - std::exp((std::log((1.0 - alpha) * q) + beta) / q);
-      } else {
-        t = (4.0 * p + r - 2.0) / t;
-        if (t <= 1) {
-          value = std::exp((std::log(alpha * p) + beta) / p);
-        } else {
-          value = 1.0 - 2.0 / (t + 1.0);
-        }
-      }
-    }
-  }
-
-  // Solve for x using a modified newton-raphson method using the function
-  // BetaIncomplete.
-  {
-    value = std::max(value, kErr);
-    value = std::min(value, 1.0 - kErr);
-
-    const double r = 1.0 - p;
-    const double t = 1.0 - q;
-    double y;
-    double yprev = 0;
-    double sq = 1;
-    double prev = 1;
-    for (;;) {
-      if (value < 0 || value > 1.0) {
-        // Error case; value went infinite.
-        return std::numeric_limits<double>::infinity();
-      } else if (value == 0 || value == 1) {
-        y = value;
-      } else {
-        y = BetaIncompleteImpl(value, p, q, beta);
-        if (!std::isfinite(y)) {
-          return y;
-        }
-      }
-      y = (y - alpha) *
-          std::exp(beta + r * std::log(value) + t * std::log(1.0 - value));
-      if (y * yprev <= 0) {
-        prev = std::max(sq, std::numeric_limits<double>::min());
-      }
-      double g = 1.0;
-      for (;;) {
-        const double adj = g * y;
-        const double adj_sq = adj * adj;
-        if (adj_sq >= prev) {
-          g = g / 3.0;
-          continue;
-        }
-        const double tx = value - adj;
-        if (tx < 0 || tx > 1) {
-          g = g / 3.0;
-          continue;
-        }
-        if (prev < kErr) {
-          return value;
-        }
-        if (y * y < kErr) {
-          return value;
-        }
-        if (tx == value) {
-          return value;
-        }
-        if (tx == 0 || tx == 1) {
-          g = g / 3.0;
-          continue;
-        }
-        value = tx;
-        yprev = y;
-        break;
-      }
-    }
-  }
-
-  // NOTES: See also: Asymptotic inversion of the incomplete beta function.
-  // https://core.ac.uk/download/pdf/82140723.pdf
-  //
-  // NOTE: See the Boost library documentation as well:
-  // https://www.boost.org/doc/libs/1_52_0/libs/math/doc/sf_and_dist/html/math_toolkit/special/sf_beta/ibeta_function.html
-}
-
-}  // namespace
-
-double BetaIncomplete(const double x, const double p, const double q) {
-  // Error cases.
-  if (p < 0 || q < 0 || x < 0 || x > 1.0) {
-    return std::numeric_limits<double>::infinity();
-  }
-  if (x == 0 || x == 1) {
-    return x;
-  }
-  // ln(Beta(p, q))
-  double beta = std::lgamma(p) + std::lgamma(q) - std::lgamma(p + q);
-  return BetaIncompleteImpl(x, p, q, beta);
-}
-
-double BetaIncompleteInv(const double p, const double q, const double alpha) {
-  // Error cases.
-  if (p < 0 || q < 0 || alpha < 0 || alpha > 1.0) {
-    return std::numeric_limits<double>::infinity();
-  }
-  if (alpha == 0 || alpha == 1) {
-    return alpha;
-  }
-  // ln(Beta(p, q))
-  double beta = std::lgamma(p) + std::lgamma(q) - std::lgamma(p + q);
-  return BetaIncompleteInvImpl(p, q, beta, alpha);
-}
-
-// Given `num_trials` trials each with probability `p` of success, the
-// probability of no failures is `p^k`. To ensure the probability of a failure
-// is no more than `p_fail`, it must be that `p^k == 1 - p_fail`. This function
-// computes `p` from that equation.
-double RequiredSuccessProbability(const double p_fail, const int num_trials) {
-  double p = std::exp(std::log(1.0 - p_fail) / static_cast<double>(num_trials));
-  ABSL_ASSERT(p > 0);
-  return p;
-}
-
-double ZScore(double expected_mean, const DistributionMoments& moments) {
-  return (moments.mean - expected_mean) /
-         (std::sqrt(moments.variance) /
-          std::sqrt(static_cast<double>(moments.n)));
-}
-
-double MaxErrorTolerance(double acceptance_probability) {
-  double one_sided_pvalue = 0.5 * (1.0 - acceptance_probability);
-  const double max_err = InverseNormalSurvival(one_sided_pvalue);
-  ABSL_ASSERT(max_err > 0);
-  return max_err;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/distribution_test_util.h b/third_party/abseil/absl/random/internal/distribution_test_util.h
deleted file mode 100644
index 6d94cf6..0000000
--- a/third_party/abseil/absl/random/internal/distribution_test_util.h
+++ /dev/null
@@ -1,113 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_DISTRIBUTION_TEST_UTIL_H_
-#define ABSL_RANDOM_INTERNAL_DISTRIBUTION_TEST_UTIL_H_
-
-#include <cstddef>
-#include <iostream>
-#include <vector>
-
-#include "absl/strings/string_view.h"
-#include "absl/types/span.h"
-
-// NOTE: The functions in this file are test only, and are should not be used in
-// non-test code.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// http://webspace.ship.edu/pgmarr/Geo441/Lectures/Lec%205%20-%20Normality%20Testing.pdf
-
-// Compute the 1st to 4th standard moments:
-// mean, variance, skewness, and kurtosis.
-// http://www.itl.nist.gov/div898/handbook/eda/section3/eda35b.htm
-struct DistributionMoments {
-  size_t n = 0;
-  double mean = 0.0;
-  double variance = 0.0;
-  double skewness = 0.0;
-  double kurtosis = 0.0;
-};
-DistributionMoments ComputeDistributionMoments(
-    absl::Span<const double> data_points);
-
-std::ostream& operator<<(std::ostream& os, const DistributionMoments& moments);
-
-// Computes the Z-score for a set of data with the given distribution moments
-// compared against `expected_mean`.
-double ZScore(double expected_mean, const DistributionMoments& moments);
-
-// Returns the probability of success required for a single trial to ensure that
-// after `num_trials` trials, the probability of at least one failure is no more
-// than `p_fail`.
-double RequiredSuccessProbability(double p_fail, int num_trials);
-
-// Computes the maximum distance from the mean tolerable, for Z-Tests that are
-// expected to pass with `acceptance_probability`. Will terminate if the
-// resulting tolerance is zero (due to passing in 0.0 for
-// `acceptance_probability` or rounding errors).
-//
-// For example,
-// MaxErrorTolerance(0.001) = 0.0
-// MaxErrorTolerance(0.5) = ~0.47
-// MaxErrorTolerance(1.0) = inf
-double MaxErrorTolerance(double acceptance_probability);
-
-// Approximation to inverse of the Error Function in double precision.
-// (http://people.maths.ox.ac.uk/gilesm/files/gems_erfinv.pdf)
-double erfinv(double x);
-
-// Beta(p, q) = Gamma(p) * Gamma(q) / Gamma(p+q)
-double beta(double p, double q);
-
-// The inverse of the normal survival function.
-double InverseNormalSurvival(double x);
-
-// Returns whether actual is "near" expected, based on the bound.
-bool Near(absl::string_view msg, double actual, double expected, double bound);
-
-// Implements the incomplete regularized beta function, AS63, BETAIN.
-//    https://www.jstor.org/stable/2346797
-//
-// BetaIncomplete(x, p, q), where
-//   `x` is the value of the upper limit
-//   `p` is beta parameter p, `q` is beta parameter q.
-//
-// NOTE: This is a test-only function which is only accurate to within, at most,
-// 1e-13 of the actual value.
-//
-double BetaIncomplete(double x, double p, double q);
-
-// Implements the inverse of the incomplete regularized beta function, AS109,
-// XINBTA.
-//   https://www.jstor.org/stable/2346798
-//   https://www.jstor.org/stable/2346887
-//
-// BetaIncompleteInv(p, q, beta, alhpa)
-//   `p` is beta parameter p, `q` is beta parameter q.
-//   `alpha` is the value of the lower tail area.
-//
-// NOTE: This is a test-only function and, when successful, is only accurate to
-// within ~1e-6 of the actual value; there are some cases where it diverges from
-// the actual value by much more than that.  The function uses Newton's method,
-// and thus the runtime is highly variable.
-double BetaIncompleteInv(double p, double q, double alpha);
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_DISTRIBUTION_TEST_UTIL_H_
diff --git a/third_party/abseil/absl/random/internal/distribution_test_util_test.cc b/third_party/abseil/absl/random/internal/distribution_test_util_test.cc
deleted file mode 100644
index c49d44f..0000000
--- a/third_party/abseil/absl/random/internal/distribution_test_util_test.cc
+++ /dev/null
@@ -1,193 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/distribution_test_util.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(TestUtil, InverseErf) {
-  const struct {
-    const double z;
-    const double value;
-  } kErfInvTable[] = {
-      {0.0000001, 8.86227e-8},
-      {0.00001, 8.86227e-6},
-      {0.5, 0.4769362762044},
-      {0.6, 0.5951160814499},
-      {0.99999, 3.1234132743},
-      {0.9999999, 3.7665625816},
-      {0.999999944, 3.8403850690566985},  // = log((1-x) * (1+x)) =~ 16.004
-      {0.999999999, 4.3200053849134452},
-  };
-
-  for (const auto& data : kErfInvTable) {
-    auto value = absl::random_internal::erfinv(data.z);
-
-    // Log using the Wolfram-alpha function name & parameters.
-    EXPECT_NEAR(value, data.value, 1e-8)
-        << " InverseErf[" << data.z << "]  (expected=" << data.value << ")  -> "
-        << value;
-  }
-}
-
-const struct {
-  const double p;
-  const double q;
-  const double x;
-  const double alpha;
-} kBetaTable[] = {
-    {0.5, 0.5, 0.01, 0.06376856085851985},
-    {0.5, 0.5, 0.1, 0.2048327646991335},
-    {0.5, 0.5, 1, 1},
-    {1, 0.5, 0, 0},
-    {1, 0.5, 0.01, 0.005012562893380045},
-    {1, 0.5, 0.1, 0.0513167019494862},
-    {1, 0.5, 0.5, 0.2928932188134525},
-    {1, 1, 0.5, 0.5},
-    {2, 2, 0.1, 0.028},
-    {2, 2, 0.2, 0.104},
-    {2, 2, 0.3, 0.216},
-    {2, 2, 0.4, 0.352},
-    {2, 2, 0.5, 0.5},
-    {2, 2, 0.6, 0.648},
-    {2, 2, 0.7, 0.784},
-    {2, 2, 0.8, 0.896},
-    {2, 2, 0.9, 0.972},
-    {5.5, 5, 0.5, 0.4361908850559777},
-    {10, 0.5, 0.9, 0.1516409096346979},
-    {10, 5, 0.5, 0.08978271484375},
-    {10, 5, 1, 1},
-    {10, 10, 0.5, 0.5},
-    {20, 5, 0.8, 0.4598773297575791},
-    {20, 10, 0.6, 0.2146816102371739},
-    {20, 10, 0.8, 0.9507364826957875},
-    {20, 20, 0.5, 0.5},
-    {20, 20, 0.6, 0.8979413687105918},
-    {30, 10, 0.7, 0.2241297491808366},
-    {30, 10, 0.8, 0.7586405487192086},
-    {40, 20, 0.7, 0.7001783247477069},
-    {1, 0.5, 0.1, 0.0513167019494862},
-    {1, 0.5, 0.2, 0.1055728090000841},
-    {1, 0.5, 0.3, 0.1633399734659245},
-    {1, 0.5, 0.4, 0.2254033307585166},
-    {1, 2, 0.2, 0.36},
-    {1, 3, 0.2, 0.488},
-    {1, 4, 0.2, 0.5904},
-    {1, 5, 0.2, 0.67232},
-    {2, 2, 0.3, 0.216},
-    {3, 2, 0.3, 0.0837},
-    {4, 2, 0.3, 0.03078},
-    {5, 2, 0.3, 0.010935},
-
-    // These values test small & large points along the range of the Beta
-    // function.
-    //
-    // When selecting test points, remember that if BetaIncomplete(x, p, q)
-    // returns the same value to within the limits of precision over a large
-    // domain of the input, x, then BetaIncompleteInv(alpha, p, q) may return an
-    // essentially arbitrary value where BetaIncomplete(x, p, q) =~ alpha.
-
-    // BetaRegularized[x, 0.00001, 0.00001],
-    // For x in {~0.001 ... ~0.999}, => ~0.5
-    {1e-5, 1e-5, 1e-5, 0.4999424388184638311},
-    {1e-5, 1e-5, (1.0 - 1e-8), 0.5000920948389232964},
-
-    // BetaRegularized[x, 0.00001, 10000].
-    // For x in {~epsilon ... 1.0}, => ~1
-    {1e-5, 1e5, 1e-6, 0.9999817708130066936},
-    {1e-5, 1e5, (1.0 - 1e-7), 1.0},
-
-    // BetaRegularized[x, 10000, 0.00001].
-    // For x in {0 .. 1-epsilon}, => ~0
-    {1e5, 1e-5, 1e-6, 0},
-    {1e5, 1e-5, (1.0 - 1e-6), 1.8229186993306369e-5},
-};
-
-TEST(BetaTest, BetaIncomplete) {
-  for (const auto& data : kBetaTable) {
-    auto value = absl::random_internal::BetaIncomplete(data.x, data.p, data.q);
-
-    // Log using the Wolfram-alpha function name & parameters.
-    EXPECT_NEAR(value, data.alpha, 1e-12)
-        << " BetaRegularized[" << data.x << ", " << data.p << ", " << data.q
-        << "]  (expected=" << data.alpha << ")  -> " << value;
-  }
-}
-
-TEST(BetaTest, BetaIncompleteInv) {
-  for (const auto& data : kBetaTable) {
-    auto value =
-        absl::random_internal::BetaIncompleteInv(data.p, data.q, data.alpha);
-
-    // Log using the Wolfram-alpha function name & parameters.
-    EXPECT_NEAR(value, data.x, 1e-6)
-        << " InverseBetaRegularized[" << data.alpha << ", " << data.p << ", "
-        << data.q << "]  (expected=" << data.x << ")  -> " << value;
-  }
-}
-
-TEST(MaxErrorTolerance, MaxErrorTolerance) {
-  std::vector<std::pair<double, double>> cases = {
-      {0.0000001, 8.86227e-8 * 1.41421356237},
-      {0.00001, 8.86227e-6 * 1.41421356237},
-      {0.5, 0.4769362762044 * 1.41421356237},
-      {0.6, 0.5951160814499 * 1.41421356237},
-      {0.99999, 3.1234132743 * 1.41421356237},
-      {0.9999999, 3.7665625816 * 1.41421356237},
-      {0.999999944, 3.8403850690566985 * 1.41421356237},
-      {0.999999999, 4.3200053849134452 * 1.41421356237}};
-  for (auto entry : cases) {
-    EXPECT_NEAR(absl::random_internal::MaxErrorTolerance(entry.first),
-                entry.second, 1e-8);
-  }
-}
-
-TEST(ZScore, WithSameMean) {
-  absl::random_internal::DistributionMoments m;
-  m.n = 100;
-  m.mean = 5;
-  m.variance = 1;
-  EXPECT_NEAR(absl::random_internal::ZScore(5, m), 0, 1e-12);
-
-  m.n = 1;
-  m.mean = 0;
-  m.variance = 1;
-  EXPECT_NEAR(absl::random_internal::ZScore(0, m), 0, 1e-12);
-
-  m.n = 10000;
-  m.mean = -5;
-  m.variance = 100;
-  EXPECT_NEAR(absl::random_internal::ZScore(-5, m), 0, 1e-12);
-}
-
-TEST(ZScore, DifferentMean) {
-  absl::random_internal::DistributionMoments m;
-  m.n = 100;
-  m.mean = 5;
-  m.variance = 1;
-  EXPECT_NEAR(absl::random_internal::ZScore(4, m), 10, 1e-12);
-
-  m.n = 1;
-  m.mean = 0;
-  m.variance = 1;
-  EXPECT_NEAR(absl::random_internal::ZScore(-1, m), 1, 1e-12);
-
-  m.n = 10000;
-  m.mean = -5;
-  m.variance = 100;
-  EXPECT_NEAR(absl::random_internal::ZScore(-4, m), -10, 1e-12);
-}
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/explicit_seed_seq.h b/third_party/abseil/absl/random/internal/explicit_seed_seq.h
deleted file mode 100644
index 6a743ea..0000000
--- a/third_party/abseil/absl/random/internal/explicit_seed_seq.h
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_EXPLICIT_SEED_SEQ_H_
-#define ABSL_RANDOM_INTERNAL_EXPLICIT_SEED_SEQ_H_
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <initializer_list>
-#include <iterator>
-#include <vector>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// This class conforms to the C++ Standard "Seed Sequence" concept
-// [rand.req.seedseq].
-//
-// An "ExplicitSeedSeq" is meant to provide a conformant interface for
-// forwarding pre-computed seed material to the constructor of a class
-// conforming to the "Uniform Random Bit Generator" concept. This class makes no
-// attempt to mutate the state provided by its constructor, and returns it
-// directly via ExplicitSeedSeq::generate().
-//
-// If this class is asked to generate more seed material than was provided to
-// the constructor, then the remaining bytes will be filled with deterministic,
-// nonrandom data.
-class ExplicitSeedSeq {
- public:
-  using result_type = uint32_t;
-
-  ExplicitSeedSeq() : state_() {}
-
-  // Copy and move both allowed.
-  ExplicitSeedSeq(const ExplicitSeedSeq& other) = default;
-  ExplicitSeedSeq& operator=(const ExplicitSeedSeq& other) = default;
-  ExplicitSeedSeq(ExplicitSeedSeq&& other) = default;
-  ExplicitSeedSeq& operator=(ExplicitSeedSeq&& other) = default;
-
-  template <typename Iterator>
-  ExplicitSeedSeq(Iterator begin, Iterator end) {
-    for (auto it = begin; it != end; it++) {
-      state_.push_back(*it & 0xffffffff);
-    }
-  }
-
-  template <typename T>
-  ExplicitSeedSeq(std::initializer_list<T> il)
-      : ExplicitSeedSeq(il.begin(), il.end()) {}
-
-  size_t size() const { return state_.size(); }
-
-  template <typename OutIterator>
-  void param(OutIterator out) const {
-    std::copy(std::begin(state_), std::end(state_), out);
-  }
-
-  template <typename OutIterator>
-  void generate(OutIterator begin, OutIterator end) {
-    for (size_t index = 0; begin != end; begin++) {
-      *begin = state_.empty() ? 0 : state_[index++];
-      if (index >= state_.size()) {
-        index = 0;
-      }
-    }
-  }
-
- protected:
-  std::vector<uint32_t> state_;
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_EXPLICIT_SEED_SEQ_H_
diff --git a/third_party/abseil/absl/random/internal/explicit_seed_seq_test.cc b/third_party/abseil/absl/random/internal/explicit_seed_seq_test.cc
deleted file mode 100644
index a55ad73..0000000
--- a/third_party/abseil/absl/random/internal/explicit_seed_seq_test.cc
+++ /dev/null
@@ -1,204 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/explicit_seed_seq.h"
-
-#include <iterator>
-#include <random>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/random/seed_sequences.h"
-
-namespace {
-
-template <typename Sseq>
-bool ConformsToInterface() {
-  // Check that the SeedSequence can be default-constructed.
-  { Sseq default_constructed_seq; }
-  // Check that the SeedSequence can be constructed with two iterators.
-  {
-    uint32_t init_array[] = {1, 3, 5, 7, 9};
-    Sseq iterator_constructed_seq(init_array, &init_array[5]);
-  }
-  // Check that the SeedSequence can be std::initializer_list-constructed.
-  { Sseq list_constructed_seq = {1, 3, 5, 7, 9, 11, 13}; }
-  // Check that param() and size() return state provided to constructor.
-  {
-    uint32_t init_array[] = {1, 2, 3, 4, 5};
-    Sseq seq(init_array, &init_array[ABSL_ARRAYSIZE(init_array)]);
-    EXPECT_EQ(seq.size(), ABSL_ARRAYSIZE(init_array));
-
-    uint32_t state_array[ABSL_ARRAYSIZE(init_array)];
-    seq.param(state_array);
-
-    for (int i = 0; i < ABSL_ARRAYSIZE(state_array); i++) {
-      EXPECT_EQ(state_array[i], i + 1);
-    }
-  }
-  // Check for presence of generate() method.
-  {
-    Sseq seq;
-    uint32_t seeds[5];
-
-    seq.generate(seeds, &seeds[ABSL_ARRAYSIZE(seeds)]);
-  }
-  return true;
-}
-}  // namespace
-
-TEST(SeedSequences, CheckInterfaces) {
-  // Control case
-  EXPECT_TRUE(ConformsToInterface<std::seed_seq>());
-
-  // Abseil classes
-  EXPECT_TRUE(ConformsToInterface<absl::random_internal::ExplicitSeedSeq>());
-}
-
-TEST(ExplicitSeedSeq, DefaultConstructorGeneratesZeros) {
-  const size_t kNumBlocks = 128;
-
-  uint32_t outputs[kNumBlocks];
-  absl::random_internal::ExplicitSeedSeq seq;
-  seq.generate(outputs, &outputs[kNumBlocks]);
-
-  for (uint32_t& seed : outputs) {
-    EXPECT_EQ(seed, 0);
-  }
-}
-
-TEST(ExplicitSeeqSeq, SeedMaterialIsForwardedIdentically) {
-  const size_t kNumBlocks = 128;
-
-  uint32_t seed_material[kNumBlocks];
-  std::random_device urandom{"/dev/urandom"};
-  for (uint32_t& seed : seed_material) {
-    seed = urandom();
-  }
-  absl::random_internal::ExplicitSeedSeq seq(seed_material,
-                                             &seed_material[kNumBlocks]);
-
-  // Check that output is same as seed-material provided to constructor.
-  {
-    const size_t kNumGenerated = kNumBlocks / 2;
-    uint32_t outputs[kNumGenerated];
-    seq.generate(outputs, &outputs[kNumGenerated]);
-    for (size_t i = 0; i < kNumGenerated; i++) {
-      EXPECT_EQ(outputs[i], seed_material[i]);
-    }
-  }
-  // Check that SeedSequence is stateless between invocations: Despite the last
-  // invocation of generate() only consuming half of the input-entropy, the same
-  // entropy will be recycled for the next invocation.
-  {
-    const size_t kNumGenerated = kNumBlocks;
-    uint32_t outputs[kNumGenerated];
-    seq.generate(outputs, &outputs[kNumGenerated]);
-    for (size_t i = 0; i < kNumGenerated; i++) {
-      EXPECT_EQ(outputs[i], seed_material[i]);
-    }
-  }
-  // Check that when more seed-material is asked for than is provided, nonzero
-  // values are still written.
-  {
-    const size_t kNumGenerated = kNumBlocks * 2;
-    uint32_t outputs[kNumGenerated];
-    seq.generate(outputs, &outputs[kNumGenerated]);
-    for (size_t i = 0; i < kNumGenerated; i++) {
-      EXPECT_EQ(outputs[i], seed_material[i % kNumBlocks]);
-    }
-  }
-}
-
-TEST(ExplicitSeedSeq, CopyAndMoveConstructors) {
-  using testing::Each;
-  using testing::Eq;
-  using testing::Not;
-  using testing::Pointwise;
-
-  uint32_t entropy[4];
-  std::random_device urandom("/dev/urandom");
-  for (uint32_t& entry : entropy) {
-    entry = urandom();
-  }
-  absl::random_internal::ExplicitSeedSeq seq_from_entropy(std::begin(entropy),
-                                                          std::end(entropy));
-  // Copy constructor.
-  {
-    absl::random_internal::ExplicitSeedSeq seq_copy(seq_from_entropy);
-    EXPECT_EQ(seq_copy.size(), seq_from_entropy.size());
-
-    std::vector<uint32_t> seeds_1;
-    seeds_1.resize(1000, 0);
-    std::vector<uint32_t> seeds_2;
-    seeds_2.resize(1000, 1);
-
-    seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
-    seq_copy.generate(seeds_2.begin(), seeds_2.end());
-
-    EXPECT_THAT(seeds_1, Pointwise(Eq(), seeds_2));
-  }
-  // Assignment operator.
-  {
-    for (uint32_t& entry : entropy) {
-      entry = urandom();
-    }
-    absl::random_internal::ExplicitSeedSeq another_seq(std::begin(entropy),
-                                                       std::end(entropy));
-
-    std::vector<uint32_t> seeds_1;
-    seeds_1.resize(1000, 0);
-    std::vector<uint32_t> seeds_2;
-    seeds_2.resize(1000, 0);
-
-    seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
-    another_seq.generate(seeds_2.begin(), seeds_2.end());
-
-    // Assert precondition: Sequences generated by seed-sequences are not equal.
-    EXPECT_THAT(seeds_1, Not(Pointwise(Eq(), seeds_2)));
-
-    // Apply the assignment-operator.
-    another_seq = seq_from_entropy;
-
-    // Re-generate seeds.
-    seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
-    another_seq.generate(seeds_2.begin(), seeds_2.end());
-
-    // Seeds generated by seed-sequences should now be equal.
-    EXPECT_THAT(seeds_1, Pointwise(Eq(), seeds_2));
-  }
-  // Move constructor.
-  {
-    // Get seeds from seed-sequence constructed from entropy.
-    std::vector<uint32_t> seeds_1;
-    seeds_1.resize(1000, 0);
-    seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
-
-    // Apply move-constructor move the sequence to another instance.
-    absl::random_internal::ExplicitSeedSeq moved_seq(
-        std::move(seq_from_entropy));
-    std::vector<uint32_t> seeds_2;
-    seeds_2.resize(1000, 1);
-    moved_seq.generate(seeds_2.begin(), seeds_2.end());
-    // Verify that seeds produced by moved-instance are the same as original.
-    EXPECT_THAT(seeds_1, Pointwise(Eq(), seeds_2));
-
-    // Verify that the moved-from instance now behaves like a
-    // default-constructed instance.
-    EXPECT_EQ(seq_from_entropy.size(), 0);
-    seq_from_entropy.generate(seeds_1.begin(), seeds_1.end());
-    EXPECT_THAT(seeds_1, Each(Eq(0)));
-  }
-}
diff --git a/third_party/abseil/absl/random/internal/fast_uniform_bits.h b/third_party/abseil/absl/random/internal/fast_uniform_bits.h
deleted file mode 100644
index 425aaf7..0000000
--- a/third_party/abseil/absl/random/internal/fast_uniform_bits.h
+++ /dev/null
@@ -1,268 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_FAST_UNIFORM_BITS_H_
-#define ABSL_RANDOM_INTERNAL_FAST_UNIFORM_BITS_H_
-
-#include <cstddef>
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-#include "absl/base/config.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-// Returns true if the input value is zero or a power of two. Useful for
-// determining if the range of output values in a URBG
-template <typename UIntType>
-constexpr bool IsPowerOfTwoOrZero(UIntType n) {
-  return (n == 0) || ((n & (n - 1)) == 0);
-}
-
-// Computes the length of the range of values producible by the URBG, or returns
-// zero if that would encompass the entire range of representable values in
-// URBG::result_type.
-template <typename URBG>
-constexpr typename URBG::result_type RangeSize() {
-  using result_type = typename URBG::result_type;
-  static_assert((URBG::max)() != (URBG::min)(), "URBG range cannot be 0.");
-  return ((URBG::max)() == (std::numeric_limits<result_type>::max)() &&
-          (URBG::min)() == std::numeric_limits<result_type>::lowest())
-             ? result_type{0}
-             : ((URBG::max)() - (URBG::min)() + result_type{1});
-}
-
-// Computes the floor of the log. (i.e., std::floor(std::log2(N));
-template <typename UIntType>
-constexpr UIntType IntegerLog2(UIntType n) {
-  return (n <= 1) ? 0 : 1 + IntegerLog2(n >> 1);
-}
-
-// Returns the number of bits of randomness returned through
-// `PowerOfTwoVariate(urbg)`.
-template <typename URBG>
-constexpr size_t NumBits() {
-  return RangeSize<URBG>() == 0
-             ? std::numeric_limits<typename URBG::result_type>::digits
-             : IntegerLog2(RangeSize<URBG>());
-}
-
-// Given a shift value `n`, constructs a mask with exactly the low `n` bits set.
-// If `n == 0`, all bits are set.
-template <typename UIntType>
-constexpr UIntType MaskFromShift(size_t n) {
-  return ((n % std::numeric_limits<UIntType>::digits) == 0)
-             ? ~UIntType{0}
-             : (UIntType{1} << n) - UIntType{1};
-}
-
-// Tags used to dispatch FastUniformBits::generate to the simple or more complex
-// entropy extraction algorithm.
-struct SimplifiedLoopTag {};
-struct RejectionLoopTag {};
-
-// FastUniformBits implements a fast path to acquire uniform independent bits
-// from a type which conforms to the [rand.req.urbg] concept.
-// Parameterized by:
-//  `UIntType`: the result (output) type
-//
-// The std::independent_bits_engine [rand.adapt.ibits] adaptor can be
-// instantiated from an existing generator through a copy or a move. It does
-// not, however, facilitate the production of pseudorandom bits from an un-owned
-// generator that will outlive the std::independent_bits_engine instance.
-template <typename UIntType = uint64_t>
-class FastUniformBits {
- public:
-  using result_type = UIntType;
-
-  static constexpr result_type(min)() { return 0; }
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g);  // NOLINT(runtime/references)
-
- private:
-  static_assert(std::is_unsigned<UIntType>::value,
-                "Class-template FastUniformBits<> must be parameterized using "
-                "an unsigned type.");
-
-  // Generate() generates a random value, dispatched on whether
-  // the underlying URBG must use rejection sampling to generate a value,
-  // or whether a simplified loop will suffice.
-  template <typename URBG>
-  result_type Generate(URBG& g,  // NOLINT(runtime/references)
-                       SimplifiedLoopTag);
-
-  template <typename URBG>
-  result_type Generate(URBG& g,  // NOLINT(runtime/references)
-                       RejectionLoopTag);
-};
-
-template <typename UIntType>
-template <typename URBG>
-typename FastUniformBits<UIntType>::result_type
-FastUniformBits<UIntType>::operator()(URBG& g) {  // NOLINT(runtime/references)
-  // kRangeMask is the mask used when sampling variates from the URBG when the
-  // width of the URBG range is not a power of 2.
-  // Y = (2 ^ kRange) - 1
-  static_assert((URBG::max)() > (URBG::min)(),
-                "URBG::max and URBG::min may not be equal.");
-
-  using tag = absl::conditional_t<IsPowerOfTwoOrZero(RangeSize<URBG>()),
-                                  SimplifiedLoopTag, RejectionLoopTag>;
-  return Generate(g, tag{});
-}
-
-template <typename UIntType>
-template <typename URBG>
-typename FastUniformBits<UIntType>::result_type
-FastUniformBits<UIntType>::Generate(URBG& g,  // NOLINT(runtime/references)
-                                    SimplifiedLoopTag) {
-  // The simplified version of FastUniformBits works only on URBGs that have
-  // a range that is a power of 2. In this case we simply loop and shift without
-  // attempting to balance the bits across calls.
-  static_assert(IsPowerOfTwoOrZero(RangeSize<URBG>()),
-                "incorrect Generate tag for URBG instance");
-
-  static constexpr size_t kResultBits =
-      std::numeric_limits<result_type>::digits;
-  static constexpr size_t kUrbgBits = NumBits<URBG>();
-  static constexpr size_t kIters =
-      (kResultBits / kUrbgBits) + (kResultBits % kUrbgBits != 0);
-  static constexpr size_t kShift = (kIters == 1) ? 0 : kUrbgBits;
-  static constexpr auto kMin = (URBG::min)();
-
-  result_type r = static_cast<result_type>(g() - kMin);
-  for (size_t n = 1; n < kIters; ++n) {
-    r = (r << kShift) + static_cast<result_type>(g() - kMin);
-  }
-  return r;
-}
-
-template <typename UIntType>
-template <typename URBG>
-typename FastUniformBits<UIntType>::result_type
-FastUniformBits<UIntType>::Generate(URBG& g,  // NOLINT(runtime/references)
-                                    RejectionLoopTag) {
-  static_assert(!IsPowerOfTwoOrZero(RangeSize<URBG>()),
-                "incorrect Generate tag for URBG instance");
-  using urbg_result_type = typename URBG::result_type;
-
-  // See [rand.adapt.ibits] for more details on the constants calculated below.
-  //
-  // It is preferable to use roughly the same number of bits from each generator
-  // call, however this is only possible when the number of bits provided by the
-  // URBG is a divisor of the number of bits in `result_type`. In all other
-  // cases, the number of bits used cannot always be the same, but it can be
-  // guaranteed to be off by at most 1. Thus we run two loops, one with a
-  // smaller bit-width size (`kSmallWidth`) and one with a larger width size
-  // (satisfying `kLargeWidth == kSmallWidth + 1`). The loops are run
-  // `kSmallIters` and `kLargeIters` times respectively such
-  // that
-  //
-  //    `kResultBits == kSmallIters * kSmallBits
-  //                    + kLargeIters * kLargeBits`
-  //
-  // where `kResultBits` is the total number of bits in `result_type`.
-  //
-  static constexpr size_t kResultBits =
-      std::numeric_limits<result_type>::digits;                      // w
-  static constexpr urbg_result_type kUrbgRange = RangeSize<URBG>();  // R
-  static constexpr size_t kUrbgBits = NumBits<URBG>();               // m
-
-  // compute the initial estimate of the bits used.
-  // [rand.adapt.ibits] 2 (c)
-  static constexpr size_t kA =  // ceil(w/m)
-      (kResultBits / kUrbgBits) + ((kResultBits % kUrbgBits) != 0);  // n'
-
-  static constexpr size_t kABits = kResultBits / kA;  // w0'
-  static constexpr urbg_result_type kARejection =
-      ((kUrbgRange >> kABits) << kABits);  // y0'
-
-  // refine the selection to reduce the rejection frequency.
-  static constexpr size_t kTotalIters =
-      ((kUrbgRange - kARejection) <= (kARejection / kA)) ? kA : (kA + 1);  // n
-
-  // [rand.adapt.ibits] 2 (b)
-  static constexpr size_t kSmallIters =
-      kTotalIters - (kResultBits % kTotalIters);                   // n0
-  static constexpr size_t kSmallBits = kResultBits / kTotalIters;  // w0
-  static constexpr urbg_result_type kSmallRejection =
-      ((kUrbgRange >> kSmallBits) << kSmallBits);  // y0
-
-  static constexpr size_t kLargeBits = kSmallBits + 1;  // w0+1
-  static constexpr urbg_result_type kLargeRejection =
-      ((kUrbgRange >> kLargeBits) << kLargeBits);  // y1
-
-  //
-  // Because `kLargeBits == kSmallBits + 1`, it follows that
-  //
-  //     `kResultBits == kSmallIters * kSmallBits + kLargeIters`
-  //
-  // and therefore
-  //
-  //     `kLargeIters == kTotalWidth % kSmallWidth`
-  //
-  // Intuitively, each iteration with the large width accounts for one unit
-  // of the remainder when `kTotalWidth` is divided by `kSmallWidth`. As
-  // mentioned above, if the URBG width is a divisor of `kTotalWidth`, then
-  // there would be no need for any large iterations (i.e., one loop would
-  // suffice), and indeed, in this case, `kLargeIters` would be zero.
-  static_assert(kResultBits == kSmallIters * kSmallBits +
-                                   (kTotalIters - kSmallIters) * kLargeBits,
-                "Error in looping constant calculations.");
-
-  // The small shift is essentially small bits, but due to the potential
-  // of generating a smaller result_type from a larger urbg type, the actual
-  // shift might be 0.
-  static constexpr size_t kSmallShift = kSmallBits % kResultBits;
-  static constexpr auto kSmallMask =
-      MaskFromShift<urbg_result_type>(kSmallShift);
-  static constexpr size_t kLargeShift = kLargeBits % kResultBits;
-  static constexpr auto kLargeMask =
-      MaskFromShift<urbg_result_type>(kLargeShift);
-
-  static constexpr auto kMin = (URBG::min)();
-
-  result_type s = 0;
-  for (size_t n = 0; n < kSmallIters; ++n) {
-    urbg_result_type v;
-    do {
-      v = g() - kMin;
-    } while (v >= kSmallRejection);
-
-    s = (s << kSmallShift) + static_cast<result_type>(v & kSmallMask);
-  }
-
-  for (size_t n = kSmallIters; n < kTotalIters; ++n) {
-    urbg_result_type v;
-    do {
-      v = g() - kMin;
-    } while (v >= kLargeRejection);
-
-    s = (s << kLargeShift) + static_cast<result_type>(v & kLargeMask);
-  }
-  return s;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_FAST_UNIFORM_BITS_H_
diff --git a/third_party/abseil/absl/random/internal/fast_uniform_bits_test.cc b/third_party/abseil/absl/random/internal/fast_uniform_bits_test.cc
deleted file mode 100644
index cee702d..0000000
--- a/third_party/abseil/absl/random/internal/fast_uniform_bits_test.cc
+++ /dev/null
@@ -1,336 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/fast_uniform_bits.h"
-
-#include <random>
-
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-template <typename IntType>
-class FastUniformBitsTypedTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<uint8_t, uint16_t, uint32_t, uint64_t>;
-
-TYPED_TEST_SUITE(FastUniformBitsTypedTest, IntTypes);
-
-TYPED_TEST(FastUniformBitsTypedTest, BasicTest) {
-  using Limits = std::numeric_limits<TypeParam>;
-  using FastBits = FastUniformBits<TypeParam>;
-
-  EXPECT_EQ(0, (FastBits::min)());
-  EXPECT_EQ((Limits::max)(), (FastBits::max)());
-
-  constexpr int kIters = 10000;
-  std::random_device rd;
-  std::mt19937 gen(rd());
-  FastBits fast;
-  for (int i = 0; i < kIters; i++) {
-    const auto v = fast(gen);
-    EXPECT_LE(v, (FastBits::max)());
-    EXPECT_GE(v, (FastBits::min)());
-  }
-}
-
-template <typename UIntType, UIntType Lo, UIntType Hi, UIntType Val = Lo>
-struct FakeUrbg {
-  using result_type = UIntType;
-
-  FakeUrbg() = default;
-  explicit FakeUrbg(bool r) : reject(r) {}
-
-  static constexpr result_type(max)() { return Hi; }
-  static constexpr result_type(min)() { return Lo; }
-  result_type operator()() {
-    // when reject is set, return Hi half the time.
-    return ((++calls % 2) == 1 && reject) ? Hi : Val;
-  }
-
-  bool reject = false;
-  size_t calls = 0;
-};
-
-TEST(FastUniformBitsTest, IsPowerOfTwoOrZero) {
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint8_t{0}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint8_t{1}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint8_t{2}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint8_t{3}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint8_t{4}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint8_t{16}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint8_t{17}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero((std::numeric_limits<uint8_t>::max)()));
-
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint16_t{0}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint16_t{1}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint16_t{2}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint16_t{3}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint16_t{4}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint16_t{16}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint16_t{17}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero((std::numeric_limits<uint16_t>::max)()));
-
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint32_t{0}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint32_t{1}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint32_t{2}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint32_t{3}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint32_t{32}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint32_t{17}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero((std::numeric_limits<uint32_t>::max)()));
-
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint64_t{0}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint64_t{1}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint64_t{2}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint64_t{3}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint64_t{4}));
-  EXPECT_TRUE(IsPowerOfTwoOrZero(uint64_t{64}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero(uint64_t{17}));
-  EXPECT_FALSE(IsPowerOfTwoOrZero((std::numeric_limits<uint64_t>::max)()));
-}
-
-TEST(FastUniformBitsTest, IntegerLog2) {
-  EXPECT_EQ(0, IntegerLog2(uint16_t{0}));
-  EXPECT_EQ(0, IntegerLog2(uint16_t{1}));
-  EXPECT_EQ(1, IntegerLog2(uint16_t{2}));
-  EXPECT_EQ(1, IntegerLog2(uint16_t{3}));
-  EXPECT_EQ(2, IntegerLog2(uint16_t{4}));
-  EXPECT_EQ(2, IntegerLog2(uint16_t{5}));
-  EXPECT_EQ(2, IntegerLog2(uint16_t{7}));
-  EXPECT_EQ(3, IntegerLog2(uint16_t{8}));
-  EXPECT_EQ(63, IntegerLog2((std::numeric_limits<uint64_t>::max)()));
-}
-
-TEST(FastUniformBitsTest, RangeSize) {
-  EXPECT_EQ(2, (RangeSize<FakeUrbg<uint8_t, 0, 1>>()));
-  EXPECT_EQ(3, (RangeSize<FakeUrbg<uint8_t, 0, 2>>()));
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint8_t, 0, 3>>()));
-  //  EXPECT_EQ(0, (RangeSize<FakeUrbg<uint8_t, 2, 2>>()));
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint8_t, 2, 5>>()));
-  EXPECT_EQ(5, (RangeSize<FakeUrbg<uint8_t, 2, 6>>()));
-  EXPECT_EQ(9, (RangeSize<FakeUrbg<uint8_t, 2, 10>>()));
-  EXPECT_EQ(
-      0, (RangeSize<
-             FakeUrbg<uint8_t, 0, (std::numeric_limits<uint8_t>::max)()>>()));
-
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint16_t, 0, 3>>()));
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint16_t, 2, 5>>()));
-  EXPECT_EQ(5, (RangeSize<FakeUrbg<uint16_t, 2, 6>>()));
-  EXPECT_EQ(18, (RangeSize<FakeUrbg<uint16_t, 1000, 1017>>()));
-  EXPECT_EQ(
-      0, (RangeSize<
-             FakeUrbg<uint16_t, 0, (std::numeric_limits<uint16_t>::max)()>>()));
-
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint32_t, 0, 3>>()));
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint32_t, 2, 5>>()));
-  EXPECT_EQ(5, (RangeSize<FakeUrbg<uint32_t, 2, 6>>()));
-  EXPECT_EQ(18, (RangeSize<FakeUrbg<uint32_t, 1000, 1017>>()));
-  EXPECT_EQ(0, (RangeSize<FakeUrbg<uint32_t, 0, 0xffffffff>>()));
-  EXPECT_EQ(0xffffffff, (RangeSize<FakeUrbg<uint32_t, 1, 0xffffffff>>()));
-  EXPECT_EQ(0xfffffffe, (RangeSize<FakeUrbg<uint32_t, 1, 0xfffffffe>>()));
-  EXPECT_EQ(0xfffffffd, (RangeSize<FakeUrbg<uint32_t, 2, 0xfffffffe>>()));
-  EXPECT_EQ(
-      0, (RangeSize<
-             FakeUrbg<uint32_t, 0, (std::numeric_limits<uint32_t>::max)()>>()));
-
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint64_t, 0, 3>>()));
-  EXPECT_EQ(4, (RangeSize<FakeUrbg<uint64_t, 2, 5>>()));
-  EXPECT_EQ(5, (RangeSize<FakeUrbg<uint64_t, 2, 6>>()));
-  EXPECT_EQ(18, (RangeSize<FakeUrbg<uint64_t, 1000, 1017>>()));
-  EXPECT_EQ(0x100000000, (RangeSize<FakeUrbg<uint64_t, 0, 0xffffffff>>()));
-  EXPECT_EQ(0xffffffff, (RangeSize<FakeUrbg<uint64_t, 1, 0xffffffff>>()));
-  EXPECT_EQ(0xfffffffe, (RangeSize<FakeUrbg<uint64_t, 1, 0xfffffffe>>()));
-  EXPECT_EQ(0xfffffffd, (RangeSize<FakeUrbg<uint64_t, 2, 0xfffffffe>>()));
-  EXPECT_EQ(0, (RangeSize<FakeUrbg<uint64_t, 0, 0xffffffffffffffff>>()));
-  EXPECT_EQ(0xffffffffffffffff,
-            (RangeSize<FakeUrbg<uint64_t, 1, 0xffffffffffffffff>>()));
-  EXPECT_EQ(0xfffffffffffffffe,
-            (RangeSize<FakeUrbg<uint64_t, 1, 0xfffffffffffffffe>>()));
-  EXPECT_EQ(0xfffffffffffffffd,
-            (RangeSize<FakeUrbg<uint64_t, 2, 0xfffffffffffffffe>>()));
-  EXPECT_EQ(
-      0, (RangeSize<
-             FakeUrbg<uint64_t, 0, (std::numeric_limits<uint64_t>::max)()>>()));
-}
-
-// The constants need to be choosen so that an infinite rejection loop doesn't
-// happen...
-using Urng1_5bit = FakeUrbg<uint8_t, 0, 2, 0>;  // ~1.5 bits (range 3)
-using Urng4bits = FakeUrbg<uint8_t, 1, 0x10, 2>;
-using Urng22bits = FakeUrbg<uint32_t, 0, 0x3fffff, 0x301020>;
-using Urng31bits = FakeUrbg<uint32_t, 1, 0xfffffffe, 0x60070f03>;  // ~31.9 bits
-using Urng32bits = FakeUrbg<uint32_t, 0, 0xffffffff, 0x74010f01>;
-using Urng33bits =
-    FakeUrbg<uint64_t, 1, 0x1ffffffff, 0x013301033>;  // ~32.9 bits
-using Urng63bits = FakeUrbg<uint64_t, 1, 0xfffffffffffffffe,
-                            0xfedcba9012345678>;  // ~63.9 bits
-using Urng64bits =
-    FakeUrbg<uint64_t, 0, 0xffffffffffffffff, 0x123456780fedcba9>;
-
-TEST(FastUniformBitsTest, OutputsUpTo32Bits) {
-  // Tests that how values are composed; the single-bit deltas should be spread
-  // across each invocation.
-  Urng1_5bit urng1_5;
-  Urng4bits urng4;
-  Urng22bits urng22;
-  Urng31bits urng31;
-  Urng32bits urng32;
-  Urng33bits urng33;
-  Urng63bits urng63;
-  Urng64bits urng64;
-
-  // 8-bit types
-  {
-    FastUniformBits<uint8_t> fast8;
-    EXPECT_EQ(0x0, fast8(urng1_5));
-    EXPECT_EQ(0x11, fast8(urng4));
-    EXPECT_EQ(0x20, fast8(urng22));
-    EXPECT_EQ(0x2, fast8(urng31));
-    EXPECT_EQ(0x1, fast8(urng32));
-    EXPECT_EQ(0x32, fast8(urng33));
-    EXPECT_EQ(0x77, fast8(urng63));
-    EXPECT_EQ(0xa9, fast8(urng64));
-  }
-
-  // 16-bit types
-  {
-    FastUniformBits<uint16_t> fast16;
-    EXPECT_EQ(0x0, fast16(urng1_5));
-    EXPECT_EQ(0x1111, fast16(urng4));
-    EXPECT_EQ(0x1020, fast16(urng22));
-    EXPECT_EQ(0x0f02, fast16(urng31));
-    EXPECT_EQ(0x0f01, fast16(urng32));
-    EXPECT_EQ(0x1032, fast16(urng33));
-    EXPECT_EQ(0x5677, fast16(urng63));
-    EXPECT_EQ(0xcba9, fast16(urng64));
-  }
-
-  // 32-bit types
-  {
-    FastUniformBits<uint32_t> fast32;
-    EXPECT_EQ(0x0, fast32(urng1_5));
-    EXPECT_EQ(0x11111111, fast32(urng4));
-    EXPECT_EQ(0x08301020, fast32(urng22));
-    EXPECT_EQ(0x0f020f02, fast32(urng31));
-    EXPECT_EQ(0x74010f01, fast32(urng32));
-    EXPECT_EQ(0x13301032, fast32(urng33));
-    EXPECT_EQ(0x12345677, fast32(urng63));
-    EXPECT_EQ(0x0fedcba9, fast32(urng64));
-  }
-}
-
-TEST(FastUniformBitsTest, Outputs64Bits) {
-  // Tests that how values are composed; the single-bit deltas should be spread
-  // across each invocation.
-  FastUniformBits<uint64_t> fast64;
-
-  {
-    FakeUrbg<uint8_t, 0, 1, 0> urng0;
-    FakeUrbg<uint8_t, 0, 1, 1> urng1;
-    Urng4bits urng4;
-    Urng22bits urng22;
-    Urng31bits urng31;
-    Urng32bits urng32;
-    Urng33bits urng33;
-    Urng63bits urng63;
-    Urng64bits urng64;
-
-    // somewhat degenerate cases only create a single bit.
-    EXPECT_EQ(0x0, fast64(urng0));
-    EXPECT_EQ(64, urng0.calls);
-    EXPECT_EQ(0xffffffffffffffff, fast64(urng1));
-    EXPECT_EQ(64, urng1.calls);
-
-    // less degenerate cases.
-    EXPECT_EQ(0x1111111111111111, fast64(urng4));
-    EXPECT_EQ(16, urng4.calls);
-    EXPECT_EQ(0x01020c0408301020, fast64(urng22));
-    EXPECT_EQ(3, urng22.calls);
-    EXPECT_EQ(0x387811c3c0870f02, fast64(urng31));
-    EXPECT_EQ(3, urng31.calls);
-    EXPECT_EQ(0x74010f0174010f01, fast64(urng32));
-    EXPECT_EQ(2, urng32.calls);
-    EXPECT_EQ(0x808194040cb01032, fast64(urng33));
-    EXPECT_EQ(3, urng33.calls);
-    EXPECT_EQ(0x1234567712345677, fast64(urng63));
-    EXPECT_EQ(2, urng63.calls);
-    EXPECT_EQ(0x123456780fedcba9, fast64(urng64));
-    EXPECT_EQ(1, urng64.calls);
-  }
-
-  // The 1.5 bit case is somewhat interesting in that the algorithm refinement
-  // causes one extra small sample. Comments here reference the names used in
-  // [rand.adapt.ibits] that correspond to this case.
-  {
-    Urng1_5bit urng1_5;
-
-    // w = 64
-    // R = 3
-    // m = 1
-    // n' = 64
-    // w0' = 1
-    // y0' = 2
-    // n = (1 <= 0) > 64 : 65 = 65
-    // n0 = 65 - (64%65) = 1
-    // n1 = 64
-    // w0 = 0
-    // y0 = 3
-    // w1 = 1
-    // y1 = 2
-    EXPECT_EQ(0x0, fast64(urng1_5));
-    EXPECT_EQ(65, urng1_5.calls);
-  }
-
-  // Validate rejections for non-power-of-2 cases.
-  {
-    Urng1_5bit urng1_5(true);
-    Urng31bits urng31(true);
-    Urng33bits urng33(true);
-    Urng63bits urng63(true);
-
-    // For 1.5 bits, there would be 1+2*64, except the first
-    // value was accepted and shifted off the end.
-    EXPECT_EQ(0, fast64(urng1_5));
-    EXPECT_EQ(128, urng1_5.calls);
-    EXPECT_EQ(0x387811c3c0870f02, fast64(urng31));
-    EXPECT_EQ(6, urng31.calls);
-    EXPECT_EQ(0x808194040cb01032, fast64(urng33));
-    EXPECT_EQ(6, urng33.calls);
-    EXPECT_EQ(0x1234567712345677, fast64(urng63));
-    EXPECT_EQ(4, urng63.calls);
-  }
-}
-
-TEST(FastUniformBitsTest, URBG32bitRegression) {
-  // Validate with deterministic 32-bit std::minstd_rand
-  // to ensure that operator() performs as expected.
-
-  EXPECT_EQ(2147483646, RangeSize<std::minstd_rand>());
-  EXPECT_EQ(30, IntegerLog2(RangeSize<std::minstd_rand>()));
-
-  std::minstd_rand gen(1);
-  FastUniformBits<uint64_t> fast64;
-
-  EXPECT_EQ(0x05e47095f8791f45, fast64(gen));
-  EXPECT_EQ(0x028be17e3c07c122, fast64(gen));
-  EXPECT_EQ(0x55d2847c1626e8c2, fast64(gen));
-}
-
-}  // namespace
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/fastmath.h b/third_party/abseil/absl/random/internal/fastmath.h
deleted file mode 100644
index 963b769..0000000
--- a/third_party/abseil/absl/random/internal/fastmath.h
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_FASTMATH_H_
-#define ABSL_RANDOM_INTERNAL_FASTMATH_H_
-
-// This file contains fast math functions (bitwise ops as well as some others)
-// which are implementation details of various absl random number distributions.
-
-#include <cassert>
-#include <cmath>
-#include <cstdint>
-
-#include "absl/numeric/bits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Compute log2(n) using integer operations.
-// While std::log2 is more accurate than std::log(n) / std::log(2), for
-// very large numbers--those close to std::numeric_limits<uint64_t>::max() - 2,
-// for instance--std::log2 rounds up rather than down, which introduces
-// definite skew in the results.
-inline int IntLog2Floor(uint64_t n) {
-  return (n <= 1) ? 0 : (63 - countl_zero(n));
-}
-inline int IntLog2Ceil(uint64_t n) {
-  return (n <= 1) ? 0 : (64 - countl_zero(n - 1));
-}
-
-inline double StirlingLogFactorial(double n) {
-  assert(n >= 1);
-  // Using Stirling's approximation.
-  constexpr double kLog2PI = 1.83787706640934548356;
-  const double logn = std::log(n);
-  const double ninv = 1.0 / static_cast<double>(n);
-  return n * logn - n + 0.5 * (kLog2PI + logn) + (1.0 / 12.0) * ninv -
-         (1.0 / 360.0) * ninv * ninv * ninv;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_FASTMATH_H_
diff --git a/third_party/abseil/absl/random/internal/fastmath_test.cc b/third_party/abseil/absl/random/internal/fastmath_test.cc
deleted file mode 100644
index 0d6f9dc..0000000
--- a/third_party/abseil/absl/random/internal/fastmath_test.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/fastmath.h"
-
-#include "gtest/gtest.h"
-
-#if defined(__native_client__) || defined(__EMSCRIPTEN__)
-// NACL has a less accurate implementation of std::log2 than most of
-// the other platforms. For some values which should have integral results,
-// sometimes NACL returns slightly larger values.
-//
-// The MUSL libc used by emscripten also has a similar bug.
-#define ABSL_RANDOM_INACCURATE_LOG2
-#endif
-
-namespace {
-
-TEST(FastMathTest, IntLog2FloorTest) {
-  using absl::random_internal::IntLog2Floor;
-  constexpr uint64_t kZero = 0;
-  EXPECT_EQ(0, IntLog2Floor(0));  // boundary. return 0.
-  EXPECT_EQ(0, IntLog2Floor(1));
-  EXPECT_EQ(1, IntLog2Floor(2));
-  EXPECT_EQ(63, IntLog2Floor(~kZero));
-
-  // A boundary case: Converting 0xffffffffffffffff requires > 53
-  // bits of precision, so the conversion to double rounds up,
-  // and the result of std::log2(x) > IntLog2Floor(x).
-  EXPECT_LT(IntLog2Floor(~kZero), static_cast<int>(std::log2(~kZero)));
-
-  for (int i = 0; i < 64; i++) {
-    const uint64_t i_pow_2 = static_cast<uint64_t>(1) << i;
-    EXPECT_EQ(i, IntLog2Floor(i_pow_2));
-    EXPECT_EQ(i, static_cast<int>(std::log2(i_pow_2)));
-
-    uint64_t y = i_pow_2;
-    for (int j = i - 1; j > 0; --j) {
-      y = y | (i_pow_2 >> j);
-      EXPECT_EQ(i, IntLog2Floor(y));
-    }
-  }
-}
-
-TEST(FastMathTest, IntLog2CeilTest) {
-  using absl::random_internal::IntLog2Ceil;
-  constexpr uint64_t kZero = 0;
-  EXPECT_EQ(0, IntLog2Ceil(0));  // boundary. return 0.
-  EXPECT_EQ(0, IntLog2Ceil(1));
-  EXPECT_EQ(1, IntLog2Ceil(2));
-  EXPECT_EQ(64, IntLog2Ceil(~kZero));
-
-  // A boundary case: Converting 0xffffffffffffffff requires > 53
-  // bits of precision, so the conversion to double rounds up,
-  // and the result of std::log2(x) > IntLog2Floor(x).
-  EXPECT_LE(IntLog2Ceil(~kZero), static_cast<int>(std::log2(~kZero)));
-
-  for (int i = 0; i < 64; i++) {
-    const uint64_t i_pow_2 = static_cast<uint64_t>(1) << i;
-    EXPECT_EQ(i, IntLog2Ceil(i_pow_2));
-#ifndef ABSL_RANDOM_INACCURATE_LOG2
-    EXPECT_EQ(i, static_cast<int>(std::ceil(std::log2(i_pow_2))));
-#endif
-
-    uint64_t y = i_pow_2;
-    for (int j = i - 1; j > 0; --j) {
-      y = y | (i_pow_2 >> j);
-      EXPECT_EQ(i + 1, IntLog2Ceil(y));
-    }
-  }
-}
-
-TEST(FastMathTest, StirlingLogFactorial) {
-  using absl::random_internal::StirlingLogFactorial;
-
-  EXPECT_NEAR(StirlingLogFactorial(1.0), 0, 1e-3);
-  EXPECT_NEAR(StirlingLogFactorial(1.50), 0.284683, 1e-3);
-  EXPECT_NEAR(StirlingLogFactorial(2.0), 0.69314718056, 1e-4);
-
-  for (int i = 2; i < 50; i++) {
-    double d = static_cast<double>(i);
-    EXPECT_NEAR(StirlingLogFactorial(d), std::lgamma(d + 1), 3e-5);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/gaussian_distribution_gentables.cc b/third_party/abseil/absl/random/internal/gaussian_distribution_gentables.cc
deleted file mode 100644
index a95333d..0000000
--- a/third_party/abseil/absl/random/internal/gaussian_distribution_gentables.cc
+++ /dev/null
@@ -1,143 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Generates gaussian_distribution.cc
-//
-// $ blaze run :gaussian_distribution_gentables > gaussian_distribution.cc
-//
-#include "absl/random/gaussian_distribution.h"
-
-#include <cmath>
-#include <cstddef>
-#include <iostream>
-#include <limits>
-#include <string>
-
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-template <typename T, size_t N>
-void FormatArrayContents(std::ostream* os, T (&data)[N]) {
-  if (!std::numeric_limits<T>::is_exact) {
-    // Note: T is either an integer or a float.
-    // float requires higher precision to ensure that values are
-    // reproduced exactly.
-    // Trivia: C99 has hexadecimal floating point literals, but C++11 does not.
-    // Using them would remove all concern of precision loss.
-    os->precision(std::numeric_limits<T>::max_digits10 + 2);
-  }
-  *os << "    {";
-  std::string separator = "";
-  for (size_t i = 0; i < N; ++i) {
-    *os << separator << data[i];
-    if ((i + 1) % 3 != 0) {
-      separator = ", ";
-    } else {
-      separator = ",\n     ";
-    }
-  }
-  *os << "}";
-}
-
-}  // namespace
-
-class TableGenerator : public gaussian_distribution_base {
- public:
-  TableGenerator();
-  void Print(std::ostream* os);
-
-  using gaussian_distribution_base::kMask;
-  using gaussian_distribution_base::kR;
-  using gaussian_distribution_base::kV;
-
- private:
-  Tables tables_;
-};
-
-// Ziggurat gaussian initialization.  For an explanation of the algorithm, see
-// the Marsaglia paper, "The Ziggurat Method for Generating Random Variables".
-//   http://www.jstatsoft.org/v05/i08/
-//
-// Further details are available in the Doornik paper
-//   https://www.doornik.com/research/ziggurat.pdf
-//
-TableGenerator::TableGenerator() {
-  // The constants here should match the values in gaussian_distribution.h
-  static constexpr int kC = kMask + 1;
-
-  static_assert((ABSL_ARRAYSIZE(tables_.x) == kC + 1),
-                "xArray must be length kMask + 2");
-
-  static_assert((ABSL_ARRAYSIZE(tables_.x) == ABSL_ARRAYSIZE(tables_.f)),
-                "fx and x arrays must be identical length");
-
-  auto f = [](double x) { return std::exp(-0.5 * x * x); };
-  auto f_inv = [](double x) { return std::sqrt(-2.0 * std::log(x)); };
-
-  tables_.x[0] = kV / f(kR);
-  tables_.f[0] = f(tables_.x[0]);
-
-  tables_.x[1] = kR;
-  tables_.f[1] = f(tables_.x[1]);
-
-  tables_.x[kC] = 0.0;
-  tables_.f[kC] = f(tables_.x[kC]);  // 1.0
-
-  for (int i = 2; i < kC; i++) {
-    double v = (kV / tables_.x[i - 1]) + tables_.f[i - 1];
-    tables_.x[i] = f_inv(v);
-    tables_.f[i] = v;
-  }
-}
-
-void TableGenerator::Print(std::ostream* os) {
-  *os << "// BEGIN GENERATED CODE; DO NOT EDIT\n"
-         "// clang-format off\n"
-         "\n"
-         "#include \"absl/random/gaussian_distribution.h\"\n"
-         "\n"
-         "namespace absl {\n"
-         "ABSL_NAMESPACE_BEGIN\n"
-         "namespace random_internal {\n"
-         "\n"
-         "const gaussian_distribution_base::Tables\n"
-         "    gaussian_distribution_base::zg_ = {\n";
-  FormatArrayContents(os, tables_.x);
-  *os << ",\n";
-  FormatArrayContents(os, tables_.f);
-  *os << "};\n"
-         "\n"
-         "}  // namespace random_internal\n"
-         "ABSL_NAMESPACE_END\n"
-         "}  // namespace absl\n"
-         "\n"
-         "// clang-format on\n"
-         "// END GENERATED CODE";
-  *os << std::endl;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-int main(int, char**) {
-  std::cerr << "\nCopy the output to gaussian_distribution.cc" << std::endl;
-  absl::random_internal::TableGenerator generator;
-  generator.Print(&std::cout);
-  return 0;
-}
diff --git a/third_party/abseil/absl/random/internal/generate_real.h b/third_party/abseil/absl/random/internal/generate_real.h
deleted file mode 100644
index 4f62873..0000000
--- a/third_party/abseil/absl/random/internal/generate_real.h
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_GENERATE_REAL_H_
-#define ABSL_RANDOM_INTERNAL_GENERATE_REAL_H_
-
-// This file contains some implementation details which are used by one or more
-// of the absl random number distributions.
-
-#include <cstdint>
-#include <cstring>
-#include <limits>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/bits.h"
-#include "absl/random/internal/fastmath.h"
-#include "absl/random/internal/traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Tristate tag types controlling the output of GenerateRealFromBits.
-struct GeneratePositiveTag {};
-struct GenerateNegativeTag {};
-struct GenerateSignedTag {};
-
-// GenerateRealFromBits generates a single real value from a single 64-bit
-// `bits` with template fields controlling the output.
-//
-// The `SignedTag` parameter controls whether positive, negative,
-// or either signed/unsigned may be returned.
-//   When SignedTag == GeneratePositiveTag, range is U(0, 1)
-//   When SignedTag == GenerateNegativeTag, range is U(-1, 0)
-//   When SignedTag == GenerateSignedTag, range is U(-1, 1)
-//
-// When the `IncludeZero` parameter is true, the function may return 0 for some
-// inputs, otherwise it never returns 0.
-//
-// When a value in U(0,1) is required, use:
-//   Uniform64ToReal<double, PositiveValueT, true>;
-//
-// When a value in U(-1,1) is required, use:
-//   Uniform64ToReal<double, SignedValueT, false>;
-//
-//   This generates more distinct values than the mathematical equivalent
-//   `U(0, 1) * 2.0 - 1.0`.
-//
-// Scaling the result by powers of 2 (and avoiding a multiply) is also possible:
-//   GenerateRealFromBits<double>(..., -1);  => U(0, 0.5)
-//   GenerateRealFromBits<double>(..., 1);   => U(0, 2)
-//
-template <typename RealType,  // Real type, either float or double.
-          typename SignedTag = GeneratePositiveTag,  // Whether a positive,
-                                                     // negative, or signed
-                                                     // value is generated.
-          bool IncludeZero = true>
-inline RealType GenerateRealFromBits(uint64_t bits, int exp_bias = 0) {
-  using real_type = RealType;
-  using uint_type = absl::conditional_t<std::is_same<real_type, float>::value,
-                                        uint32_t, uint64_t>;
-
-  static_assert(
-      (std::is_same<double, real_type>::value ||
-       std::is_same<float, real_type>::value),
-      "GenerateRealFromBits must be parameterized by either float or double.");
-
-  static_assert(sizeof(uint_type) == sizeof(real_type),
-                "Mismatched unsinged and real types.");
-
-  static_assert((std::numeric_limits<real_type>::is_iec559 &&
-                 std::numeric_limits<real_type>::radix == 2),
-                "RealType representation is not IEEE 754 binary.");
-
-  static_assert((std::is_same<SignedTag, GeneratePositiveTag>::value ||
-                 std::is_same<SignedTag, GenerateNegativeTag>::value ||
-                 std::is_same<SignedTag, GenerateSignedTag>::value),
-                "");
-
-  static constexpr int kExp = std::numeric_limits<real_type>::digits - 1;
-  static constexpr uint_type kMask = (static_cast<uint_type>(1) << kExp) - 1u;
-  static constexpr int kUintBits = sizeof(uint_type) * 8;
-
-  int exp = exp_bias + int{std::numeric_limits<real_type>::max_exponent - 2};
-
-  // Determine the sign bit.
-  // Depending on the SignedTag, this may use the left-most bit
-  // or it may be a constant value.
-  uint_type sign = std::is_same<SignedTag, GenerateNegativeTag>::value
-                       ? (static_cast<uint_type>(1) << (kUintBits - 1))
-                       : 0;
-  if (std::is_same<SignedTag, GenerateSignedTag>::value) {
-    if (std::is_same<uint_type, uint64_t>::value) {
-      sign = bits & uint64_t{0x8000000000000000};
-    }
-    if (std::is_same<uint_type, uint32_t>::value) {
-      const uint64_t tmp = bits & uint64_t{0x8000000000000000};
-      sign = static_cast<uint32_t>(tmp >> 32);
-    }
-    // adjust the bits and the exponent to account for removing
-    // the leading bit.
-    bits = bits & uint64_t{0x7FFFFFFFFFFFFFFF};
-    exp++;
-  }
-  if (IncludeZero) {
-    if (bits == 0u) return 0;
-  }
-
-  // Number of leading zeros is mapped to the exponent: 2^-clz
-  // bits is 0..01xxxxxx. After shifting, we're left with 1xxx...0..0
-  int clz = countl_zero(bits);
-  bits <<= (IncludeZero ? clz : (clz & 63));  // remove 0-bits.
-  exp -= clz;                                 // set the exponent.
-  bits >>= (63 - kExp);
-
-  // Construct the 32-bit or 64-bit IEEE 754 floating-point value from
-  // the individual fields: sign, exp, mantissa(bits).
-  uint_type val =
-      (std::is_same<SignedTag, GeneratePositiveTag>::value ? 0u : sign) |
-      (static_cast<uint_type>(exp) << kExp) |
-      (static_cast<uint_type>(bits) & kMask);
-
-  // bit_cast to the output-type
-  real_type result;
-  memcpy(static_cast<void*>(&result), static_cast<const void*>(&val),
-         sizeof(result));
-  return result;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_GENERATE_REAL_H_
diff --git a/third_party/abseil/absl/random/internal/generate_real_test.cc b/third_party/abseil/absl/random/internal/generate_real_test.cc
deleted file mode 100644
index b099dbf..0000000
--- a/third_party/abseil/absl/random/internal/generate_real_test.cc
+++ /dev/null
@@ -1,496 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/generate_real.h"
-
-#include <cfloat>
-#include <cstddef>
-#include <cstdint>
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/flags/flag.h"
-#include "absl/numeric/bits.h"
-
-ABSL_FLAG(int64_t, absl_random_test_trials, 50000,
-          "Number of trials for the probability tests.");
-
-using absl::random_internal::GenerateNegativeTag;
-using absl::random_internal::GeneratePositiveTag;
-using absl::random_internal::GenerateRealFromBits;
-using absl::random_internal::GenerateSignedTag;
-
-namespace {
-
-TEST(GenerateRealTest, U64ToFloat_Positive_NoZero_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GeneratePositiveTag, false>(a);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), 2.710505431e-20f);
-  EXPECT_EQ(ToFloat(0x0000000000000001), 5.421010862e-20f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), 0.5);
-  EXPECT_EQ(ToFloat(0x8000000000000001), 0.5);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), 0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloat_Positive_Zero_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GeneratePositiveTag, true>(a);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), 0.0);
-  EXPECT_EQ(ToFloat(0x0000000000000001), 5.421010862e-20f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), 0.5);
-  EXPECT_EQ(ToFloat(0x8000000000000001), 0.5);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), 0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloat_Negative_NoZero_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GenerateNegativeTag, false>(a);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), -2.710505431e-20f);
-  EXPECT_EQ(ToFloat(0x0000000000000001), -5.421010862e-20f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), -0.5);
-  EXPECT_EQ(ToFloat(0x8000000000000001), -0.5);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), -0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloat_Negative_Zero_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GenerateNegativeTag, true>(a);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), 0.0);
-  EXPECT_EQ(ToFloat(0x0000000000000001), -5.421010862e-20f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), -0.5);
-  EXPECT_EQ(ToFloat(0x8000000000000001), -0.5);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), -0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloat_Signed_NoZero_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GenerateSignedTag, false>(a);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), 5.421010862e-20f);
-  EXPECT_EQ(ToFloat(0x0000000000000001), 1.084202172e-19f);
-  EXPECT_EQ(ToFloat(0x7FFFFFFFFFFFFFFF), 0.9999999404f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), -5.421010862e-20f);
-  EXPECT_EQ(ToFloat(0x8000000000000001), -1.084202172e-19f);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), -0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloat_Signed_Zero_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GenerateSignedTag, true>(a);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), 0);
-  EXPECT_EQ(ToFloat(0x0000000000000001), 1.084202172e-19f);
-  EXPECT_EQ(ToFloat(0x7FFFFFFFFFFFFFFF), 0.9999999404f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), 0);
-  EXPECT_EQ(ToFloat(0x8000000000000001), -1.084202172e-19f);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), -0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloat_Signed_Bias_Test) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GenerateSignedTag, true>(a, 1);
-  };
-  EXPECT_EQ(ToFloat(0x0000000000000000), 0);
-  EXPECT_EQ(ToFloat(0x0000000000000001), 2 * 1.084202172e-19f);
-  EXPECT_EQ(ToFloat(0x7FFFFFFFFFFFFFFF), 2 * 0.9999999404f);
-  EXPECT_EQ(ToFloat(0x8000000000000000), 0);
-  EXPECT_EQ(ToFloat(0x8000000000000001), 2 * -1.084202172e-19f);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), 2 * -0.9999999404f);
-}
-
-TEST(GenerateRealTest, U64ToFloatTest) {
-  auto ToFloat = [](uint64_t a) -> float {
-    return GenerateRealFromBits<float, GeneratePositiveTag, true>(a);
-  };
-
-  EXPECT_EQ(ToFloat(0x0000000000000000), 0.0f);
-
-  EXPECT_EQ(ToFloat(0x8000000000000000), 0.5f);
-  EXPECT_EQ(ToFloat(0x8000000000000001), 0.5f);
-  EXPECT_EQ(ToFloat(0x800000FFFFFFFFFF), 0.5f);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), 0.9999999404f);
-
-  EXPECT_GT(ToFloat(0x0000000000000001), 0.0f);
-
-  EXPECT_NE(ToFloat(0x7FFFFF0000000000), ToFloat(0x7FFFFEFFFFFFFFFF));
-
-  EXPECT_LT(ToFloat(0xFFFFFFFFFFFFFFFF), 1.0f);
-  int32_t two_to_24 = 1 << 24;
-  EXPECT_EQ(static_cast<int32_t>(ToFloat(0xFFFFFFFFFFFFFFFF) * two_to_24),
-            two_to_24 - 1);
-  EXPECT_NE(static_cast<int32_t>(ToFloat(0xFFFFFFFFFFFFFFFF) * two_to_24 * 2),
-            two_to_24 * 2 - 1);
-  EXPECT_EQ(ToFloat(0xFFFFFFFFFFFFFFFF), ToFloat(0xFFFFFF0000000000));
-  EXPECT_NE(ToFloat(0xFFFFFFFFFFFFFFFF), ToFloat(0xFFFFFEFFFFFFFFFF));
-  EXPECT_EQ(ToFloat(0x7FFFFFFFFFFFFFFF), ToFloat(0x7FFFFF8000000000));
-  EXPECT_NE(ToFloat(0x7FFFFFFFFFFFFFFF), ToFloat(0x7FFFFF7FFFFFFFFF));
-  EXPECT_EQ(ToFloat(0x3FFFFFFFFFFFFFFF), ToFloat(0x3FFFFFC000000000));
-  EXPECT_NE(ToFloat(0x3FFFFFFFFFFFFFFF), ToFloat(0x3FFFFFBFFFFFFFFF));
-
-  // For values where every bit counts, the values scale as multiples of the
-  // input.
-  for (int i = 0; i < 100; ++i) {
-    EXPECT_EQ(i * ToFloat(0x0000000000000001), ToFloat(i));
-  }
-
-  // For each i: value generated from (1 << i).
-  float exp_values[64];
-  exp_values[63] = 0.5f;
-  for (int i = 62; i >= 0; --i) exp_values[i] = 0.5f * exp_values[i + 1];
-  constexpr uint64_t one = 1;
-  for (int i = 0; i < 64; ++i) {
-    EXPECT_EQ(ToFloat(one << i), exp_values[i]);
-    for (int j = 1; j < FLT_MANT_DIG && i - j >= 0; ++j) {
-      EXPECT_NE(exp_values[i] + exp_values[i - j], exp_values[i]);
-      EXPECT_EQ(ToFloat((one << i) + (one << (i - j))),
-                exp_values[i] + exp_values[i - j]);
-    }
-    for (int j = FLT_MANT_DIG; i - j >= 0; ++j) {
-      EXPECT_EQ(exp_values[i] + exp_values[i - j], exp_values[i]);
-      EXPECT_EQ(ToFloat((one << i) + (one << (i - j))), exp_values[i]);
-    }
-  }
-}
-
-TEST(GenerateRealTest, U64ToDouble_Positive_NoZero_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GeneratePositiveTag, false>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), 2.710505431213761085e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000001), 5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000002), 1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0x8000000000000000), 0.5);
-  EXPECT_EQ(ToDouble(0x8000000000000001), 0.5);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), 0.999999999999999888978);
-}
-
-TEST(GenerateRealTest, U64ToDouble_Positive_Zero_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GeneratePositiveTag, true>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), 0.0);
-  EXPECT_EQ(ToDouble(0x0000000000000001), 5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x8000000000000000), 0.5);
-  EXPECT_EQ(ToDouble(0x8000000000000001), 0.5);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), 0.999999999999999888978);
-}
-
-TEST(GenerateRealTest, U64ToDouble_Negative_NoZero_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GenerateNegativeTag, false>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), -2.710505431213761085e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000001), -5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000002), -1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0x8000000000000000), -0.5);
-  EXPECT_EQ(ToDouble(0x8000000000000001), -0.5);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), -0.999999999999999888978);
-}
-
-TEST(GenerateRealTest, U64ToDouble_Negative_Zero_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GenerateNegativeTag, true>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), 0.0);
-  EXPECT_EQ(ToDouble(0x0000000000000001), -5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000002), -1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0x8000000000000000), -0.5);
-  EXPECT_EQ(ToDouble(0x8000000000000001), -0.5);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), -0.999999999999999888978);
-}
-
-TEST(GenerateRealTest, U64ToDouble_Signed_NoZero_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GenerateSignedTag, false>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), 5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000001), 1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0x7FFFFFFFFFFFFFFF), 0.999999999999999888978);
-  EXPECT_EQ(ToDouble(0x8000000000000000), -5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x8000000000000001), -1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), -0.999999999999999888978);
-}
-
-TEST(GenerateRealTest, U64ToDouble_Signed_Zero_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GenerateSignedTag, true>(a);
-  };
-  EXPECT_EQ(ToDouble(0x0000000000000000), 0);
-  EXPECT_EQ(ToDouble(0x0000000000000001), 1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0x7FFFFFFFFFFFFFFF), 0.999999999999999888978);
-  EXPECT_EQ(ToDouble(0x8000000000000000), 0);
-  EXPECT_EQ(ToDouble(0x8000000000000001), -1.084202172485504434e-19);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), -0.999999999999999888978);
-}
-
-TEST(GenerateRealTest, U64ToDouble_GenerateSignedTag_Bias_Test) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GenerateSignedTag, true>(a, -1);
-  };
-  EXPECT_EQ(ToDouble(0x0000000000000000), 0);
-  EXPECT_EQ(ToDouble(0x0000000000000001), 1.084202172485504434e-19 / 2);
-  EXPECT_EQ(ToDouble(0x7FFFFFFFFFFFFFFF), 0.999999999999999888978 / 2);
-  EXPECT_EQ(ToDouble(0x8000000000000000), 0);
-  EXPECT_EQ(ToDouble(0x8000000000000001), -1.084202172485504434e-19 / 2);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), -0.999999999999999888978 / 2);
-}
-
-TEST(GenerateRealTest, U64ToDoubleTest) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GeneratePositiveTag, true>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), 0.0);
-  EXPECT_EQ(ToDouble(0x0000000000000000), 0.0);
-
-  EXPECT_EQ(ToDouble(0x0000000000000001), 5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x7fffffffffffffef), 0.499999999999999944489);
-  EXPECT_EQ(ToDouble(0x8000000000000000), 0.5);
-
-  // For values > 0.5, RandU64ToDouble discards up to 11 bits. (64-53).
-  EXPECT_EQ(ToDouble(0x8000000000000001), 0.5);
-  EXPECT_EQ(ToDouble(0x80000000000007FF), 0.5);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), 0.999999999999999888978);
-  EXPECT_NE(ToDouble(0x7FFFFFFFFFFFF800), ToDouble(0x7FFFFFFFFFFFF7FF));
-
-  EXPECT_LT(ToDouble(0xFFFFFFFFFFFFFFFF), 1.0);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFF), ToDouble(0xFFFFFFFFFFFFF800));
-  EXPECT_NE(ToDouble(0xFFFFFFFFFFFFFFFF), ToDouble(0xFFFFFFFFFFFFF7FF));
-  EXPECT_EQ(ToDouble(0x7FFFFFFFFFFFFFFF), ToDouble(0x7FFFFFFFFFFFFC00));
-  EXPECT_NE(ToDouble(0x7FFFFFFFFFFFFFFF), ToDouble(0x7FFFFFFFFFFFFBFF));
-  EXPECT_EQ(ToDouble(0x3FFFFFFFFFFFFFFF), ToDouble(0x3FFFFFFFFFFFFE00));
-  EXPECT_NE(ToDouble(0x3FFFFFFFFFFFFFFF), ToDouble(0x3FFFFFFFFFFFFDFF));
-
-  EXPECT_EQ(ToDouble(0x1000000000000001), 0.0625);
-  EXPECT_EQ(ToDouble(0x2000000000000001), 0.125);
-  EXPECT_EQ(ToDouble(0x3000000000000001), 0.1875);
-  EXPECT_EQ(ToDouble(0x4000000000000001), 0.25);
-  EXPECT_EQ(ToDouble(0x5000000000000001), 0.3125);
-  EXPECT_EQ(ToDouble(0x6000000000000001), 0.375);
-  EXPECT_EQ(ToDouble(0x7000000000000001), 0.4375);
-  EXPECT_EQ(ToDouble(0x8000000000000001), 0.5);
-  EXPECT_EQ(ToDouble(0x9000000000000001), 0.5625);
-  EXPECT_EQ(ToDouble(0xa000000000000001), 0.625);
-  EXPECT_EQ(ToDouble(0xb000000000000001), 0.6875);
-  EXPECT_EQ(ToDouble(0xc000000000000001), 0.75);
-  EXPECT_EQ(ToDouble(0xd000000000000001), 0.8125);
-  EXPECT_EQ(ToDouble(0xe000000000000001), 0.875);
-  EXPECT_EQ(ToDouble(0xf000000000000001), 0.9375);
-
-  // Large powers of 2.
-  int64_t two_to_53 = int64_t{1} << 53;
-  EXPECT_EQ(static_cast<int64_t>(ToDouble(0xFFFFFFFFFFFFFFFF) * two_to_53),
-            two_to_53 - 1);
-  EXPECT_NE(static_cast<int64_t>(ToDouble(0xFFFFFFFFFFFFFFFF) * two_to_53 * 2),
-            two_to_53 * 2 - 1);
-
-  // For values where every bit counts, the values scale as multiples of the
-  // input.
-  for (int i = 0; i < 100; ++i) {
-    EXPECT_EQ(i * ToDouble(0x0000000000000001), ToDouble(i));
-  }
-
-  // For each i: value generated from (1 << i).
-  double exp_values[64];
-  exp_values[63] = 0.5;
-  for (int i = 62; i >= 0; --i) exp_values[i] = 0.5 * exp_values[i + 1];
-  constexpr uint64_t one = 1;
-  for (int i = 0; i < 64; ++i) {
-    EXPECT_EQ(ToDouble(one << i), exp_values[i]);
-    for (int j = 1; j < DBL_MANT_DIG && i - j >= 0; ++j) {
-      EXPECT_NE(exp_values[i] + exp_values[i - j], exp_values[i]);
-      EXPECT_EQ(ToDouble((one << i) + (one << (i - j))),
-                exp_values[i] + exp_values[i - j]);
-    }
-    for (int j = DBL_MANT_DIG; i - j >= 0; ++j) {
-      EXPECT_EQ(exp_values[i] + exp_values[i - j], exp_values[i]);
-      EXPECT_EQ(ToDouble((one << i) + (one << (i - j))), exp_values[i]);
-    }
-  }
-}
-
-TEST(GenerateRealTest, U64ToDoubleSignedTest) {
-  auto ToDouble = [](uint64_t a) {
-    return GenerateRealFromBits<double, GenerateSignedTag, false>(a);
-  };
-
-  EXPECT_EQ(ToDouble(0x0000000000000000), 5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x0000000000000001), 1.084202172485504434e-19);
-
-  EXPECT_EQ(ToDouble(0x8000000000000000), -5.42101086242752217004e-20);
-  EXPECT_EQ(ToDouble(0x8000000000000001), -1.084202172485504434e-19);
-
-  const double e_plus = ToDouble(0x0000000000000001);
-  const double e_minus = ToDouble(0x8000000000000001);
-  EXPECT_EQ(e_plus, 1.084202172485504434e-19);
-  EXPECT_EQ(e_minus, -1.084202172485504434e-19);
-
-  EXPECT_EQ(ToDouble(0x3fffffffffffffef), 0.499999999999999944489);
-  EXPECT_EQ(ToDouble(0xbfffffffffffffef), -0.499999999999999944489);
-
-  // For values > 0.5, RandU64ToDouble discards up to 10 bits. (63-53).
-  EXPECT_EQ(ToDouble(0x4000000000000000), 0.5);
-  EXPECT_EQ(ToDouble(0x4000000000000001), 0.5);
-  EXPECT_EQ(ToDouble(0x40000000000003FF), 0.5);
-
-  EXPECT_EQ(ToDouble(0xC000000000000000), -0.5);
-  EXPECT_EQ(ToDouble(0xC000000000000001), -0.5);
-  EXPECT_EQ(ToDouble(0xC0000000000003FF), -0.5);
-
-  EXPECT_EQ(ToDouble(0x7FFFFFFFFFFFFFFe), 0.999999999999999888978);
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFe), -0.999999999999999888978);
-
-  EXPECT_NE(ToDouble(0x7FFFFFFFFFFFF800), ToDouble(0x7FFFFFFFFFFFF7FF));
-
-  EXPECT_LT(ToDouble(0x7FFFFFFFFFFFFFFF), 1.0);
-  EXPECT_GT(ToDouble(0x7FFFFFFFFFFFFFFF), 0.9999999999);
-
-  EXPECT_GT(ToDouble(0xFFFFFFFFFFFFFFFe), -1.0);
-  EXPECT_LT(ToDouble(0xFFFFFFFFFFFFFFFe), -0.999999999);
-
-  EXPECT_EQ(ToDouble(0xFFFFFFFFFFFFFFFe), ToDouble(0xFFFFFFFFFFFFFC00));
-  EXPECT_EQ(ToDouble(0x7FFFFFFFFFFFFFFF), ToDouble(0x7FFFFFFFFFFFFC00));
-  EXPECT_NE(ToDouble(0xFFFFFFFFFFFFFFFe), ToDouble(0xFFFFFFFFFFFFF3FF));
-  EXPECT_NE(ToDouble(0x7FFFFFFFFFFFFFFF), ToDouble(0x7FFFFFFFFFFFF3FF));
-
-  EXPECT_EQ(ToDouble(0x1000000000000001), 0.125);
-  EXPECT_EQ(ToDouble(0x2000000000000001), 0.25);
-  EXPECT_EQ(ToDouble(0x3000000000000001), 0.375);
-  EXPECT_EQ(ToDouble(0x4000000000000001), 0.5);
-  EXPECT_EQ(ToDouble(0x5000000000000001), 0.625);
-  EXPECT_EQ(ToDouble(0x6000000000000001), 0.75);
-  EXPECT_EQ(ToDouble(0x7000000000000001), 0.875);
-  EXPECT_EQ(ToDouble(0x7800000000000001), 0.9375);
-  EXPECT_EQ(ToDouble(0x7c00000000000001), 0.96875);
-  EXPECT_EQ(ToDouble(0x7e00000000000001), 0.984375);
-  EXPECT_EQ(ToDouble(0x7f00000000000001), 0.9921875);
-
-  // 0x8000000000000000 ~= 0
-  EXPECT_EQ(ToDouble(0x9000000000000001), -0.125);
-  EXPECT_EQ(ToDouble(0xa000000000000001), -0.25);
-  EXPECT_EQ(ToDouble(0xb000000000000001), -0.375);
-  EXPECT_EQ(ToDouble(0xc000000000000001), -0.5);
-  EXPECT_EQ(ToDouble(0xd000000000000001), -0.625);
-  EXPECT_EQ(ToDouble(0xe000000000000001), -0.75);
-  EXPECT_EQ(ToDouble(0xf000000000000001), -0.875);
-
-  // Large powers of 2.
-  int64_t two_to_53 = int64_t{1} << 53;
-  EXPECT_EQ(static_cast<int64_t>(ToDouble(0x7FFFFFFFFFFFFFFF) * two_to_53),
-            two_to_53 - 1);
-  EXPECT_EQ(static_cast<int64_t>(ToDouble(0xFFFFFFFFFFFFFFFF) * two_to_53),
-            -(two_to_53 - 1));
-
-  EXPECT_NE(static_cast<int64_t>(ToDouble(0x7FFFFFFFFFFFFFFF) * two_to_53 * 2),
-            two_to_53 * 2 - 1);
-
-  // For values where every bit counts, the values scale as multiples of the
-  // input.
-  for (int i = 1; i < 100; ++i) {
-    EXPECT_EQ(i * e_plus, ToDouble(i)) << i;
-    EXPECT_EQ(i * e_minus, ToDouble(0x8000000000000000 | i)) << i;
-  }
-}
-
-TEST(GenerateRealTest, ExhaustiveFloat) {
-  auto ToFloat = [](uint64_t a) {
-    return GenerateRealFromBits<float, GeneratePositiveTag, true>(a);
-  };
-
-  // Rely on RandU64ToFloat generating values from greatest to least when
-  // supplied with uint64_t values from greatest (0xfff...) to least (0x0).
-  // Thus, this algorithm stores the previous value, and if the new value is at
-  // greater than or equal to the previous value, then there is a collision in
-  // the generation algorithm.
-  //
-  // Use the computation below to convert the random value into a result:
-  //   double res = a() * (1.0f - sample) + b() * sample;
-  float last_f = 1.0, last_g = 2.0;
-  uint64_t f_collisions = 0, g_collisions = 0;
-  uint64_t f_unique = 0, g_unique = 0;
-  uint64_t total = 0;
-  auto count = [&](const float r) {
-    total++;
-    // `f` is mapped to the range [0, 1) (default)
-    const float f = 0.0f * (1.0f - r) + 1.0f * r;
-    if (f >= last_f) {
-      f_collisions++;
-    } else {
-      f_unique++;
-      last_f = f;
-    }
-    // `g` is mapped to the range [1, 2)
-    const float g = 1.0f * (1.0f - r) + 2.0f * r;
-    if (g >= last_g) {
-      g_collisions++;
-    } else {
-      g_unique++;
-      last_g = g;
-    }
-  };
-
-  size_t limit = absl::GetFlag(FLAGS_absl_random_test_trials);
-
-  // Generate all uint64_t which have unique floating point values.
-  // Counting down from 0xFFFFFFFFFFFFFFFFu ... 0x0u
-  uint64_t x = ~uint64_t(0);
-  for (; x != 0 && limit > 0;) {
-    constexpr int kDig = (64 - FLT_MANT_DIG);
-    // Set a decrement value & the next point at which to change
-    // the decrement value. By default these are 1, 0.
-    uint64_t dec = 1;
-    uint64_t chk = 0;
-
-    // Adjust decrement and check value based on how many leading 0
-    // bits are set in the current value.
-    const int clz = absl::countl_zero(x);
-    if (clz < kDig) {
-      dec <<= (kDig - clz);
-      chk = (~uint64_t(0)) >> (clz + 1);
-    }
-    for (; x > chk && limit > 0; x -= dec) {
-      count(ToFloat(x));
-      --limit;
-    }
-  }
-
-  static_assert(FLT_MANT_DIG == 24,
-                "The float type is expected to have a 24 bit mantissa.");
-
-  if (limit != 0) {
-    // There are between 2^28 and 2^29 unique values in the range [0, 1).  For
-    // the low values of x, there are 2^24 -1 unique values.  Once x > 2^24,
-    // there are 40 * 2^24 unique values. Thus:
-    // (2 + 4 + 8 ... + 2^23) + 40 * 2^23
-    EXPECT_LT(1 << 28, f_unique);
-    EXPECT_EQ((1 << 24) + 40 * (1 << 23) - 1, f_unique);
-    EXPECT_EQ(total, f_unique);
-    EXPECT_EQ(0, f_collisions);
-
-    // Expect at least 2^23 unique values for the range [1, 2)
-    EXPECT_LE(1 << 23, g_unique);
-    EXPECT_EQ(total - g_unique, g_collisions);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/iostream_state_saver.h b/third_party/abseil/absl/random/internal/iostream_state_saver.h
deleted file mode 100644
index e6e242e..0000000
--- a/third_party/abseil/absl/random/internal/iostream_state_saver.h
+++ /dev/null
@@ -1,245 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_IOSTREAM_STATE_SAVER_H_
-#define ABSL_RANDOM_INTERNAL_IOSTREAM_STATE_SAVER_H_
-
-#include <cmath>
-#include <iostream>
-#include <limits>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/int128.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// The null_state_saver does nothing.
-template <typename T>
-class null_state_saver {
- public:
-  using stream_type = T;
-  using flags_type = std::ios_base::fmtflags;
-
-  null_state_saver(T&, flags_type) {}
-  ~null_state_saver() {}
-};
-
-// ostream_state_saver is a RAII object to save and restore the common
-// basic_ostream flags used when implementing `operator <<()` on any of
-// the absl random distributions.
-template <typename OStream>
-class ostream_state_saver {
- public:
-  using ostream_type = OStream;
-  using flags_type = std::ios_base::fmtflags;
-  using fill_type = typename ostream_type::char_type;
-  using precision_type = std::streamsize;
-
-  ostream_state_saver(ostream_type& os,  // NOLINT(runtime/references)
-                      flags_type flags, fill_type fill)
-      : os_(os),
-        flags_(os.flags(flags)),
-        fill_(os.fill(fill)),
-        precision_(os.precision()) {
-    // Save state in initialized variables.
-  }
-
-  ~ostream_state_saver() {
-    // Restore saved state.
-    os_.precision(precision_);
-    os_.fill(fill_);
-    os_.flags(flags_);
-  }
-
- private:
-  ostream_type& os_;
-  const flags_type flags_;
-  const fill_type fill_;
-  const precision_type precision_;
-};
-
-#if defined(__NDK_MAJOR__) && __NDK_MAJOR__ < 16
-#define ABSL_RANDOM_INTERNAL_IOSTREAM_HEXFLOAT 1
-#else
-#define ABSL_RANDOM_INTERNAL_IOSTREAM_HEXFLOAT 0
-#endif
-
-template <typename CharT, typename Traits>
-ostream_state_saver<std::basic_ostream<CharT, Traits>> make_ostream_state_saver(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    std::ios_base::fmtflags flags = std::ios_base::dec | std::ios_base::left |
-#if ABSL_RANDOM_INTERNAL_IOSTREAM_HEXFLOAT
-                                    std::ios_base::fixed |
-#endif
-                                    std::ios_base::scientific) {
-  using result_type = ostream_state_saver<std::basic_ostream<CharT, Traits>>;
-  return result_type(os, flags, os.widen(' '));
-}
-
-template <typename T>
-typename absl::enable_if_t<!std::is_base_of<std::ios_base, T>::value,
-                           null_state_saver<T>>
-make_ostream_state_saver(T& is,  // NOLINT(runtime/references)
-                         std::ios_base::fmtflags flags = std::ios_base::dec) {
-  std::cerr << "null_state_saver";
-  using result_type = null_state_saver<T>;
-  return result_type(is, flags);
-}
-
-// stream_precision_helper<type>::kPrecision returns the base 10 precision
-// required to stream and reconstruct a real type exact binary value through
-// a binary->decimal->binary transition.
-template <typename T>
-struct stream_precision_helper {
-  // max_digits10 may be 0 on MSVC; if so, use digits10 + 3.
-  static constexpr int kPrecision =
-      (std::numeric_limits<T>::max_digits10 > std::numeric_limits<T>::digits10)
-          ? std::numeric_limits<T>::max_digits10
-          : (std::numeric_limits<T>::digits10 + 3);
-};
-
-template <>
-struct stream_precision_helper<float> {
-  static constexpr int kPrecision = 9;
-};
-template <>
-struct stream_precision_helper<double> {
-  static constexpr int kPrecision = 17;
-};
-template <>
-struct stream_precision_helper<long double> {
-  static constexpr int kPrecision = 36;  // assuming fp128
-};
-
-// istream_state_saver is a RAII object to save and restore the common
-// std::basic_istream<> flags used when implementing `operator >>()` on any of
-// the absl random distributions.
-template <typename IStream>
-class istream_state_saver {
- public:
-  using istream_type = IStream;
-  using flags_type = std::ios_base::fmtflags;
-
-  istream_state_saver(istream_type& is,  // NOLINT(runtime/references)
-                      flags_type flags)
-      : is_(is), flags_(is.flags(flags)) {}
-
-  ~istream_state_saver() { is_.flags(flags_); }
-
- private:
-  istream_type& is_;
-  flags_type flags_;
-};
-
-template <typename CharT, typename Traits>
-istream_state_saver<std::basic_istream<CharT, Traits>> make_istream_state_saver(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    std::ios_base::fmtflags flags = std::ios_base::dec |
-                                    std::ios_base::scientific |
-                                    std::ios_base::skipws) {
-  using result_type = istream_state_saver<std::basic_istream<CharT, Traits>>;
-  return result_type(is, flags);
-}
-
-template <typename T>
-typename absl::enable_if_t<!std::is_base_of<std::ios_base, T>::value,
-                           null_state_saver<T>>
-make_istream_state_saver(T& is,  // NOLINT(runtime/references)
-                         std::ios_base::fmtflags flags = std::ios_base::dec) {
-  using result_type = null_state_saver<T>;
-  return result_type(is, flags);
-}
-
-// stream_format_type<T> is a helper struct to convert types which
-// basic_iostream cannot output as decimal numbers into types which
-// basic_iostream can output as decimal numbers. Specifically:
-// * signed/unsigned char-width types are converted to int.
-// * TODO(lar): __int128 => uint128, except there is no operator << yet.
-//
-template <typename T>
-struct stream_format_type
-    : public std::conditional<(sizeof(T) == sizeof(char)), int, T> {};
-
-// stream_u128_helper allows us to write out either absl::uint128 or
-// __uint128_t types in the same way, which enables their use as internal
-// state of PRNG engines.
-template <typename T>
-struct stream_u128_helper;
-
-template <>
-struct stream_u128_helper<absl::uint128> {
-  template <typename IStream>
-  inline absl::uint128 read(IStream& in) {
-    uint64_t h = 0;
-    uint64_t l = 0;
-    in >> h >> l;
-    return absl::MakeUint128(h, l);
-  }
-
-  template <typename OStream>
-  inline void write(absl::uint128 val, OStream& out) {
-    uint64_t h = absl::Uint128High64(val);
-    uint64_t l = absl::Uint128Low64(val);
-    out << h << out.fill() << l;
-  }
-};
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-template <>
-struct stream_u128_helper<__uint128_t> {
-  template <typename IStream>
-  inline __uint128_t read(IStream& in) {
-    uint64_t h = 0;
-    uint64_t l = 0;
-    in >> h >> l;
-    return (static_cast<__uint128_t>(h) << 64) | l;
-  }
-
-  template <typename OStream>
-  inline void write(__uint128_t val, OStream& out) {
-    uint64_t h = static_cast<uint64_t>(val >> 64u);
-    uint64_t l = static_cast<uint64_t>(val);
-    out << h << out.fill() << l;
-  }
-};
-#endif
-
-template <typename FloatType, typename IStream>
-inline FloatType read_floating_point(IStream& is) {
-  static_assert(std::is_floating_point<FloatType>::value, "");
-  FloatType dest;
-  is >> dest;
-  // Parsing a double value may report a subnormal value as an error
-  // despite being able to represent it.
-  // See https://stackoverflow.com/q/52410931/3286653
-  // It may also report an underflow when parsing DOUBLE_MIN as an
-  // ERANGE error, as the parsed value may be smaller than DOUBLE_MIN
-  // and rounded up.
-  // See: https://stackoverflow.com/q/42005462
-  if (is.fail() &&
-      (std::fabs(dest) == (std::numeric_limits<FloatType>::min)() ||
-       std::fpclassify(dest) == FP_SUBNORMAL)) {
-    is.clear(is.rdstate() & (~std::ios_base::failbit));
-  }
-  return dest;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_IOSTREAM_STATE_SAVER_H_
diff --git a/third_party/abseil/absl/random/internal/iostream_state_saver_test.cc b/third_party/abseil/absl/random/internal/iostream_state_saver_test.cc
deleted file mode 100644
index 6e66266..0000000
--- a/third_party/abseil/absl/random/internal/iostream_state_saver_test.cc
+++ /dev/null
@@ -1,372 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/iostream_state_saver.h"
-
-#include <errno.h>
-#include <stdio.h>
-
-#include <sstream>
-#include <string>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using absl::random_internal::make_istream_state_saver;
-using absl::random_internal::make_ostream_state_saver;
-using absl::random_internal::stream_precision_helper;
-
-template <typename T>
-typename absl::enable_if_t<std::is_integral<T>::value, T>  //
-StreamRoundTrip(T t) {
-  std::stringstream ss;
-  {
-    auto saver = make_ostream_state_saver(ss);
-    ss.precision(stream_precision_helper<T>::kPrecision);
-    ss << t;
-  }
-  T result = 0;
-  {
-    auto saver = make_istream_state_saver(ss);
-    ss >> result;
-  }
-  EXPECT_FALSE(ss.fail())            //
-      << ss.str() << " "             //
-      << (ss.good() ? "good " : "")  //
-      << (ss.bad() ? "bad " : "")    //
-      << (ss.eof() ? "eof " : "")    //
-      << (ss.fail() ? "fail " : "");
-
-  return result;
-}
-
-template <typename T>
-typename absl::enable_if_t<std::is_floating_point<T>::value, T>  //
-StreamRoundTrip(T t) {
-  std::stringstream ss;
-  {
-    auto saver = make_ostream_state_saver(ss);
-    ss.precision(stream_precision_helper<T>::kPrecision);
-    ss << t;
-  }
-  T result = 0;
-  {
-    auto saver = make_istream_state_saver(ss);
-    result = absl::random_internal::read_floating_point<T>(ss);
-  }
-  EXPECT_FALSE(ss.fail())            //
-      << ss.str() << " "             //
-      << (ss.good() ? "good " : "")  //
-      << (ss.bad() ? "bad " : "")    //
-      << (ss.eof() ? "eof " : "")    //
-      << (ss.fail() ? "fail " : "");
-
-  return result;
-}
-
-TEST(IOStreamStateSaver, BasicSaverState) {
-  std::stringstream ss;
-  ss.precision(2);
-  ss.fill('x');
-  ss.flags(std::ios_base::dec | std::ios_base::right);
-
-  {
-    auto saver = make_ostream_state_saver(ss);
-    ss.precision(10);
-    EXPECT_NE('x', ss.fill());
-    EXPECT_EQ(10, ss.precision());
-    EXPECT_NE(std::ios_base::dec | std::ios_base::right, ss.flags());
-
-    ss << 1.23;
-  }
-
-  EXPECT_EQ('x', ss.fill());
-  EXPECT_EQ(2, ss.precision());
-  EXPECT_EQ(std::ios_base::dec | std::ios_base::right, ss.flags());
-}
-
-TEST(IOStreamStateSaver, RoundTripInts) {
-  const uint64_t kUintValues[] = {
-      0,
-      1,
-      static_cast<uint64_t>(-1),
-      2,
-      static_cast<uint64_t>(-2),
-
-      1 << 7,
-      1 << 8,
-      1 << 16,
-      1ull << 32,
-      1ull << 50,
-      1ull << 62,
-      1ull << 63,
-
-      (1 << 7) - 1,
-      (1 << 8) - 1,
-      (1 << 16) - 1,
-      (1ull << 32) - 1,
-      (1ull << 50) - 1,
-      (1ull << 62) - 1,
-      (1ull << 63) - 1,
-
-      static_cast<uint64_t>(-(1 << 8)),
-      static_cast<uint64_t>(-(1 << 16)),
-      static_cast<uint64_t>(-(1ll << 32)),
-      static_cast<uint64_t>(-(1ll << 50)),
-      static_cast<uint64_t>(-(1ll << 62)),
-
-      static_cast<uint64_t>(-(1 << 8) - 1),
-      static_cast<uint64_t>(-(1 << 16) - 1),
-      static_cast<uint64_t>(-(1ll << 32) - 1),
-      static_cast<uint64_t>(-(1ll << 50) - 1),
-      static_cast<uint64_t>(-(1ll << 62) - 1),
-  };
-
-  for (const uint64_t u : kUintValues) {
-    EXPECT_EQ(u, StreamRoundTrip<uint64_t>(u));
-
-    int64_t x = static_cast<int64_t>(u);
-    EXPECT_EQ(x, StreamRoundTrip<int64_t>(x));
-
-    double d = static_cast<double>(x);
-    EXPECT_EQ(d, StreamRoundTrip<double>(d));
-
-    float f = d;
-    EXPECT_EQ(f, StreamRoundTrip<float>(f));
-  }
-}
-
-TEST(IOStreamStateSaver, RoundTripFloats) {
-  static_assert(
-      stream_precision_helper<float>::kPrecision >= 9,
-      "stream_precision_helper<float>::kPrecision should be at least 9");
-
-  const float kValues[] = {
-      1,
-      std::nextafter(1.0f, 0.0f),  // 1 - epsilon
-      std::nextafter(1.0f, 2.0f),  // 1 + epsilon
-
-      1.0e+1f,
-      1.0e-1f,
-      1.0e+2f,
-      1.0e-2f,
-      1.0e+10f,
-      1.0e-10f,
-
-      0.00000051110000111311111111f,
-      -0.00000051110000111211111111f,
-
-      1.234678912345678912345e+6f,
-      1.234678912345678912345e-6f,
-      1.234678912345678912345e+30f,
-      1.234678912345678912345e-30f,
-      1.234678912345678912345e+38f,
-      1.0234678912345678912345e-38f,
-
-      // Boundary cases.
-      std::numeric_limits<float>::max(),
-      std::numeric_limits<float>::lowest(),
-      std::numeric_limits<float>::epsilon(),
-      std::nextafter(std::numeric_limits<float>::min(),
-                     1.0f),               // min + epsilon
-      std::numeric_limits<float>::min(),  // smallest normal
-      // There are some errors dealing with denorms on apple platforms.
-      std::numeric_limits<float>::denorm_min(),  // smallest denorm
-      std::numeric_limits<float>::min() / 2,
-      std::nextafter(std::numeric_limits<float>::min(),
-                     0.0f),  // denorm_max
-      std::nextafter(std::numeric_limits<float>::denorm_min(), 1.0f),
-  };
-
-  for (const float f : kValues) {
-    EXPECT_EQ(f, StreamRoundTrip<float>(f));
-    EXPECT_EQ(-f, StreamRoundTrip<float>(-f));
-
-    double d = f;
-    EXPECT_EQ(d, StreamRoundTrip<double>(d));
-    EXPECT_EQ(-d, StreamRoundTrip<double>(-d));
-
-    // Avoid undefined behavior (overflow/underflow).
-    if (f <= static_cast<float>(std::numeric_limits<int64_t>::max()) &&
-        f >= static_cast<float>(std::numeric_limits<int64_t>::lowest())) {
-      int64_t x = static_cast<int64_t>(f);
-      EXPECT_EQ(x, StreamRoundTrip<int64_t>(x));
-    }
-  }
-}
-
-TEST(IOStreamStateSaver, RoundTripDoubles) {
-  static_assert(
-      stream_precision_helper<double>::kPrecision >= 17,
-      "stream_precision_helper<double>::kPrecision should be at least 17");
-
-  const double kValues[] = {
-      1,
-      std::nextafter(1.0, 0.0),  // 1 - epsilon
-      std::nextafter(1.0, 2.0),  // 1 + epsilon
-
-      1.0e+1,
-      1.0e-1,
-      1.0e+2,
-      1.0e-2,
-      1.0e+10,
-      1.0e-10,
-
-      0.00000051110000111311111111,
-      -0.00000051110000111211111111,
-
-      1.234678912345678912345e+6,
-      1.234678912345678912345e-6,
-      1.234678912345678912345e+30,
-      1.234678912345678912345e-30,
-      1.234678912345678912345e+38,
-      1.0234678912345678912345e-38,
-
-      1.0e+100,
-      1.0e-100,
-      1.234678912345678912345e+308,
-      1.0234678912345678912345e-308,
-      2.22507385850720138e-308,
-
-      // Boundary cases.
-      std::numeric_limits<double>::max(),
-      std::numeric_limits<double>::lowest(),
-      std::numeric_limits<double>::epsilon(),
-      std::nextafter(std::numeric_limits<double>::min(),
-                     1.0),                 // min + epsilon
-      std::numeric_limits<double>::min(),  // smallest normal
-      // There are some errors dealing with denorms on apple platforms.
-      std::numeric_limits<double>::denorm_min(),  // smallest denorm
-      std::numeric_limits<double>::min() / 2,
-      std::nextafter(std::numeric_limits<double>::min(),
-                     0.0),  // denorm_max
-      std::nextafter(std::numeric_limits<double>::denorm_min(), 1.0f),
-  };
-
-  for (const double d : kValues) {
-    EXPECT_EQ(d, StreamRoundTrip<double>(d));
-    EXPECT_EQ(-d, StreamRoundTrip<double>(-d));
-
-    // Avoid undefined behavior (overflow/underflow).
-    if (d <= std::numeric_limits<float>::max() &&
-        d >= std::numeric_limits<float>::lowest()) {
-      float f = static_cast<float>(d);
-      EXPECT_EQ(f, StreamRoundTrip<float>(f));
-    }
-
-    // Avoid undefined behavior (overflow/underflow).
-    if (d <= static_cast<double>(std::numeric_limits<int64_t>::max()) &&
-        d >= static_cast<double>(std::numeric_limits<int64_t>::lowest())) {
-      int64_t x = static_cast<int64_t>(d);
-      EXPECT_EQ(x, StreamRoundTrip<int64_t>(x));
-    }
-  }
-}
-
-TEST(IOStreamStateSaver, RoundTripLongDoubles) {
-  // Technically, C++ only guarantees that long double is at least as large as a
-  // double.  Practically it varies from 64-bits to 128-bits.
-  //
-  // So it is best to consider long double a best-effort extended precision
-  // type.
-
-  static_assert(
-      stream_precision_helper<long double>::kPrecision >= 36,
-      "stream_precision_helper<long double>::kPrecision should be at least 36");
-
-  using real_type = long double;
-  const real_type kValues[] = {
-      1,
-      std::nextafter(1.0, 0.0),  // 1 - epsilon
-      std::nextafter(1.0, 2.0),  // 1 + epsilon
-
-      1.0e+1,
-      1.0e-1,
-      1.0e+2,
-      1.0e-2,
-      1.0e+10,
-      1.0e-10,
-
-      0.00000051110000111311111111,
-      -0.00000051110000111211111111,
-
-      1.2346789123456789123456789123456789e+6,
-      1.2346789123456789123456789123456789e-6,
-      1.2346789123456789123456789123456789e+30,
-      1.2346789123456789123456789123456789e-30,
-      1.2346789123456789123456789123456789e+38,
-      1.2346789123456789123456789123456789e-38,
-      1.2346789123456789123456789123456789e+308,
-      1.2346789123456789123456789123456789e-308,
-
-      1.0e+100,
-      1.0e-100,
-      1.234678912345678912345e+308,
-      1.0234678912345678912345e-308,
-
-      // Boundary cases.
-      std::numeric_limits<real_type>::max(),
-      std::numeric_limits<real_type>::lowest(),
-      std::numeric_limits<real_type>::epsilon(),
-      std::nextafter(std::numeric_limits<real_type>::min(),
-                     real_type(1)),           // min + epsilon
-      std::numeric_limits<real_type>::min(),  // smallest normal
-      // There are some errors dealing with denorms on apple platforms.
-      std::numeric_limits<real_type>::denorm_min(),  // smallest denorm
-      std::numeric_limits<real_type>::min() / 2,
-      std::nextafter(std::numeric_limits<real_type>::min(),
-                     0.0),  // denorm_max
-      std::nextafter(std::numeric_limits<real_type>::denorm_min(), 1.0f),
-  };
-
-  int index = -1;
-  for (const long double dd : kValues) {
-    index++;
-    EXPECT_EQ(dd, StreamRoundTrip<real_type>(dd)) << index;
-    EXPECT_EQ(-dd, StreamRoundTrip<real_type>(-dd)) << index;
-
-    // Avoid undefined behavior (overflow/underflow).
-    if (dd <= std::numeric_limits<double>::max() &&
-        dd >= std::numeric_limits<double>::lowest()) {
-      double d = static_cast<double>(dd);
-      EXPECT_EQ(d, StreamRoundTrip<double>(d));
-    }
-
-    // Avoid undefined behavior (overflow/underflow).
-    if (dd <= std::numeric_limits<int64_t>::max() &&
-        dd >= std::numeric_limits<int64_t>::lowest()) {
-      int64_t x = static_cast<int64_t>(dd);
-      EXPECT_EQ(x, StreamRoundTrip<int64_t>(x));
-    }
-  }
-}
-
-TEST(StrToDTest, DoubleMin) {
-  const char kV[] = "2.22507385850720138e-308";
-  char* end;
-  double x = std::strtod(kV, &end);
-  EXPECT_EQ(std::numeric_limits<double>::min(), x);
-  // errno may equal ERANGE.
-}
-
-TEST(StrToDTest, DoubleDenormMin) {
-  const char kV[] = "4.94065645841246544e-324";
-  char* end;
-  double x = std::strtod(kV, &end);
-  EXPECT_EQ(std::numeric_limits<double>::denorm_min(), x);
-  // errno may equal ERANGE.
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/mock_helpers.h b/third_party/abseil/absl/random/internal/mock_helpers.h
deleted file mode 100644
index 9af27ab..0000000
--- a/third_party/abseil/absl/random/internal/mock_helpers.h
+++ /dev/null
@@ -1,127 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_MOCK_HELPERS_H_
-#define ABSL_RANDOM_INTERNAL_MOCK_HELPERS_H_
-
-#include <tuple>
-#include <type_traits>
-
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// MockHelpers works in conjunction with MockOverloadSet, MockingBitGen, and
-// BitGenRef to enable the mocking capability for absl distribution functions.
-//
-// MockingBitGen registers mocks based on the typeid of a mock signature, KeyT,
-// which is used to generate a unique id.
-//
-// KeyT is a signature of the form:
-//   result_type(discriminator_type, std::tuple<args...>)
-// The mocked function signature will be composed from KeyT as:
-//   result_type(args...)
-//
-class MockHelpers {
-  using IdType = ::absl::base_internal::FastTypeIdType;
-
-  // Given a key signature type used to index the mock, extract the components.
-  // KeyT is expected to have the form:
-  //   result_type(discriminator_type, arg_tuple_type)
-  template <typename KeyT>
-  struct KeySignature;
-
-  template <typename ResultT, typename DiscriminatorT, typename ArgTupleT>
-  struct KeySignature<ResultT(DiscriminatorT, ArgTupleT)> {
-    using result_type = ResultT;
-    using discriminator_type = DiscriminatorT;
-    using arg_tuple_type = ArgTupleT;
-  };
-
-  // Detector for InvokeMock.
-  template <class T>
-  using invoke_mock_t = decltype(std::declval<T*>()->InvokeMock(
-      std::declval<IdType>(), std::declval<void*>(), std::declval<void*>()));
-
-  // Empty implementation of InvokeMock.
-  template <typename KeyT, typename ReturnT, typename ArgTupleT, typename URBG,
-            typename... Args>
-  static absl::optional<ReturnT> InvokeMockImpl(char, URBG*, Args&&...) {
-    return absl::nullopt;
-  }
-
-  // Non-empty implementation of InvokeMock.
-  template <typename KeyT, typename ReturnT, typename ArgTupleT, typename URBG,
-            typename = invoke_mock_t<URBG>, typename... Args>
-  static absl::optional<ReturnT> InvokeMockImpl(int, URBG* urbg,
-                                                Args&&... args) {
-    ArgTupleT arg_tuple(std::forward<Args>(args)...);
-    ReturnT result;
-    if (urbg->InvokeMock(::absl::base_internal::FastTypeId<KeyT>(), &arg_tuple,
-                         &result)) {
-      return result;
-    }
-    return absl::nullopt;
-  }
-
- public:
-  // Invoke a mock for the KeyT (may or may not be a signature).
-  //
-  // KeyT is used to generate a typeid-based lookup key for the mock.
-  // KeyT is a signature of the form:
-  //   result_type(discriminator_type, std::tuple<args...>)
-  // The mocked function signature will be composed from KeyT as:
-  //   result_type(args...)
-  //
-  // An instance of arg_tuple_type must be constructable from Args..., since
-  // the underlying mechanism requires a pointer to an argument tuple.
-  template <typename KeyT, typename URBG, typename... Args>
-  static auto MaybeInvokeMock(URBG* urbg, Args&&... args)
-      -> absl::optional<typename KeySignature<KeyT>::result_type> {
-    // Use function overloading to dispatch to the implemenation since
-    // more modern patterns (e.g. require + constexpr) are not supported in all
-    // compiler configurations.
-    return InvokeMockImpl<KeyT, typename KeySignature<KeyT>::result_type,
-                          typename KeySignature<KeyT>::arg_tuple_type, URBG>(
-        0, urbg, std::forward<Args>(args)...);
-  }
-
-  // Acquire a mock for the KeyT (may or may not be a signature).
-  //
-  // KeyT is used to generate a typeid-based lookup for the mock.
-  // KeyT is a signature of the form:
-  //   result_type(discriminator_type, std::tuple<args...>)
-  // The mocked function signature will be composed from KeyT as:
-  //   result_type(args...)
-  template <typename KeyT, typename MockURBG>
-  static auto MockFor(MockURBG& m) -> decltype(
-      std::declval<MockURBG>()
-          .template RegisterMock<typename KeySignature<KeyT>::result_type,
-                                 typename KeySignature<KeyT>::arg_tuple_type>(
-              std::declval<IdType>())) {
-    return m.template RegisterMock<typename KeySignature<KeyT>::result_type,
-                                   typename KeySignature<KeyT>::arg_tuple_type>(
-        ::absl::base_internal::FastTypeId<KeyT>());
-  }
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_MOCK_HELPERS_H_
diff --git a/third_party/abseil/absl/random/internal/mock_overload_set.h b/third_party/abseil/absl/random/internal/mock_overload_set.h
deleted file mode 100644
index dccc6ce..0000000
--- a/third_party/abseil/absl/random/internal/mock_overload_set.h
+++ /dev/null
@@ -1,97 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_MOCK_OVERLOAD_SET_H_
-#define ABSL_RANDOM_INTERNAL_MOCK_OVERLOAD_SET_H_
-
-#include <type_traits>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/random/internal/mock_helpers.h"
-#include "absl/random/mocking_bit_gen.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-template <typename DistrT, typename Fn>
-struct MockSingleOverload;
-
-// MockSingleOverload
-//
-// MockSingleOverload hooks in to gMock's `ON_CALL` and `EXPECT_CALL` macros.
-// EXPECT_CALL(mock_single_overload, Call(...))` will expand to a call to
-// `mock_single_overload.gmock_Call(...)`. Because expectations are stored on
-// the MockingBitGen (an argument passed inside `Call(...)`), this forwards to
-// arguments to MockingBitGen::Register.
-//
-// The underlying KeyT must match the KeyT constructed by DistributionCaller.
-template <typename DistrT, typename Ret, typename... Args>
-struct MockSingleOverload<DistrT, Ret(MockingBitGen&, Args...)> {
-  static_assert(std::is_same<typename DistrT::result_type, Ret>::value,
-                "Overload signature must have return type matching the "
-                "distribution result_type.");
-  using KeyT = Ret(DistrT, std::tuple<Args...>);
-  auto gmock_Call(
-      absl::MockingBitGen& gen,  // NOLINT(google-runtime-references)
-      const ::testing::Matcher<Args>&... matchers)
-      -> decltype(MockHelpers::MockFor<KeyT>(gen).gmock_Call(matchers...)) {
-    return MockHelpers::MockFor<KeyT>(gen).gmock_Call(matchers...);
-  }
-};
-
-template <typename DistrT, typename Ret, typename Arg, typename... Args>
-struct MockSingleOverload<DistrT, Ret(Arg, MockingBitGen&, Args...)> {
-  static_assert(std::is_same<typename DistrT::result_type, Ret>::value,
-                "Overload signature must have return type matching the "
-                "distribution result_type.");
-  using KeyT = Ret(DistrT, std::tuple<Arg, Args...>);
-  auto gmock_Call(
-      const ::testing::Matcher<Arg>& matcher,
-      absl::MockingBitGen& gen,  // NOLINT(google-runtime-references)
-      const ::testing::Matcher<Args>&... matchers)
-      -> decltype(MockHelpers::MockFor<KeyT>(gen).gmock_Call(matcher,
-                                                             matchers...)) {
-    return MockHelpers::MockFor<KeyT>(gen).gmock_Call(matcher, matchers...);
-  }
-};
-
-// MockOverloadSet
-//
-// MockOverloadSet takes a distribution and a collection of signatures and
-// performs overload resolution amongst all the overloads. This makes
-// `EXPECT_CALL(mock_overload_set, Call(...))` expand and do overload resolution
-// correctly.
-template <typename DistrT, typename... Signatures>
-struct MockOverloadSet;
-
-template <typename DistrT, typename Sig>
-struct MockOverloadSet<DistrT, Sig> : public MockSingleOverload<DistrT, Sig> {
-  using MockSingleOverload<DistrT, Sig>::gmock_Call;
-};
-
-template <typename DistrT, typename FirstSig, typename... Rest>
-struct MockOverloadSet<DistrT, FirstSig, Rest...>
-    : public MockSingleOverload<DistrT, FirstSig>,
-      public MockOverloadSet<DistrT, Rest...> {
-  using MockSingleOverload<DistrT, FirstSig>::gmock_Call;
-  using MockOverloadSet<DistrT, Rest...>::gmock_Call;
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_RANDOM_INTERNAL_MOCK_OVERLOAD_SET_H_
diff --git a/third_party/abseil/absl/random/internal/nanobenchmark.cc b/third_party/abseil/absl/random/internal/nanobenchmark.cc
deleted file mode 100644
index c918181..0000000
--- a/third_party/abseil/absl/random/internal/nanobenchmark.cc
+++ /dev/null
@@ -1,804 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/nanobenchmark.h"
-
-#include <sys/types.h>
-
-#include <algorithm>  // sort
-#include <atomic>
-#include <cstddef>
-#include <cstdint>
-#include <cstdlib>
-#include <cstring>  // memcpy
-#include <limits>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/platform.h"
-#include "absl/random/internal/randen_engine.h"
-
-// OS
-#if defined(_WIN32) || defined(_WIN64)
-#define ABSL_OS_WIN
-#include <windows.h>  // NOLINT
-
-#elif defined(__ANDROID__)
-#define ABSL_OS_ANDROID
-
-#elif defined(__linux__)
-#define ABSL_OS_LINUX
-#include <sched.h>        // NOLINT
-#include <sys/syscall.h>  // NOLINT
-#endif
-
-#if defined(ABSL_ARCH_X86_64) && !defined(ABSL_OS_WIN)
-#include <cpuid.h>  // NOLINT
-#endif
-
-// __ppc_get_timebase_freq
-#if defined(ABSL_ARCH_PPC)
-#include <sys/platform/ppc.h>  // NOLINT
-#endif
-
-// clock_gettime
-#if defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64)
-#include <time.h>  // NOLINT
-#endif
-
-// ABSL_RANDOM_INTERNAL_ATTRIBUTE_NEVER_INLINE prevents inlining of the method.
-#if ABSL_HAVE_ATTRIBUTE(noinline) || (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_RANDOM_INTERNAL_ATTRIBUTE_NEVER_INLINE __attribute__((noinline))
-#elif defined(_MSC_VER)
-#define ABSL_RANDOM_INTERNAL_ATTRIBUTE_NEVER_INLINE __declspec(noinline)
-#else
-#define ABSL_RANDOM_INTERNAL_ATTRIBUTE_NEVER_INLINE
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal_nanobenchmark {
-namespace {
-
-// For code folding.
-namespace platform {
-#if defined(ABSL_ARCH_X86_64)
-
-// TODO(janwas): Merge with the one in randen_hwaes.cc?
-void Cpuid(const uint32_t level, const uint32_t count,
-           uint32_t* ABSL_RANDOM_INTERNAL_RESTRICT abcd) {
-#if defined(ABSL_OS_WIN)
-  int regs[4];
-  __cpuidex(regs, level, count);
-  for (int i = 0; i < 4; ++i) {
-    abcd[i] = regs[i];
-  }
-#else
-  uint32_t a, b, c, d;
-  __cpuid_count(level, count, a, b, c, d);
-  abcd[0] = a;
-  abcd[1] = b;
-  abcd[2] = c;
-  abcd[3] = d;
-#endif
-}
-
-std::string BrandString() {
-  char brand_string[49];
-  uint32_t abcd[4];
-
-  // Check if brand string is supported (it is on all reasonable Intel/AMD)
-  Cpuid(0x80000000U, 0, abcd);
-  if (abcd[0] < 0x80000004U) {
-    return std::string();
-  }
-
-  for (int i = 0; i < 3; ++i) {
-    Cpuid(0x80000002U + i, 0, abcd);
-    memcpy(brand_string + i * 16, &abcd, sizeof(abcd));
-  }
-  brand_string[48] = 0;
-  return brand_string;
-}
-
-// Returns the frequency quoted inside the brand string. This does not
-// account for throttling nor Turbo Boost.
-double NominalClockRate() {
-  const std::string& brand_string = BrandString();
-  // Brand strings include the maximum configured frequency. These prefixes are
-  // defined by Intel CPUID documentation.
-  const char* prefixes[3] = {"MHz", "GHz", "THz"};
-  const double multipliers[3] = {1E6, 1E9, 1E12};
-  for (size_t i = 0; i < 3; ++i) {
-    const size_t pos_prefix = brand_string.find(prefixes[i]);
-    if (pos_prefix != std::string::npos) {
-      const size_t pos_space = brand_string.rfind(' ', pos_prefix - 1);
-      if (pos_space != std::string::npos) {
-        const std::string digits =
-            brand_string.substr(pos_space + 1, pos_prefix - pos_space - 1);
-        return std::stod(digits) * multipliers[i];
-      }
-    }
-  }
-
-  return 0.0;
-}
-
-#endif  // ABSL_ARCH_X86_64
-}  // namespace platform
-
-// Prevents the compiler from eliding the computations that led to "output".
-template <class T>
-inline void PreventElision(T&& output) {
-#ifndef ABSL_OS_WIN
-  // Works by indicating to the compiler that "output" is being read and
-  // modified. The +r constraint avoids unnecessary writes to memory, but only
-  // works for built-in types (typically FuncOutput).
-  asm volatile("" : "+r"(output) : : "memory");
-#else
-  // MSVC does not support inline assembly anymore (and never supported GCC's
-  // RTL constraints). Self-assignment with #pragma optimize("off") might be
-  // expected to prevent elision, but it does not with MSVC 2015. Type-punning
-  // with volatile pointers generates inefficient code on MSVC 2017.
-  static std::atomic<T> dummy(T{});
-  dummy.store(output, std::memory_order_relaxed);
-#endif
-}
-
-namespace timer {
-
-// Start/Stop return absolute timestamps and must be placed immediately before
-// and after the region to measure. We provide separate Start/Stop functions
-// because they use different fences.
-//
-// Background: RDTSC is not 'serializing'; earlier instructions may complete
-// after it, and/or later instructions may complete before it. 'Fences' ensure
-// regions' elapsed times are independent of such reordering. The only
-// documented unprivileged serializing instruction is CPUID, which acts as a
-// full fence (no reordering across it in either direction). Unfortunately
-// the latency of CPUID varies wildly (perhaps made worse by not initializing
-// its EAX input). Because it cannot reliably be deducted from the region's
-// elapsed time, it must not be included in the region to measure (i.e.
-// between the two RDTSC).
-//
-// The newer RDTSCP is sometimes described as serializing, but it actually
-// only serves as a half-fence with release semantics. Although all
-// instructions in the region will complete before the final timestamp is
-// captured, subsequent instructions may leak into the region and increase the
-// elapsed time. Inserting another fence after the final RDTSCP would prevent
-// such reordering without affecting the measured region.
-//
-// Fortunately, such a fence exists. The LFENCE instruction is only documented
-// to delay later loads until earlier loads are visible. However, Intel's
-// reference manual says it acts as a full fence (waiting until all earlier
-// instructions have completed, and delaying later instructions until it
-// completes). AMD assigns the same behavior to MFENCE.
-//
-// We need a fence before the initial RDTSC to prevent earlier instructions
-// from leaking into the region, and arguably another after RDTSC to avoid
-// region instructions from completing before the timestamp is recorded.
-// When surrounded by fences, the additional RDTSCP half-fence provides no
-// benefit, so the initial timestamp can be recorded via RDTSC, which has
-// lower overhead than RDTSCP because it does not read TSC_AUX. In summary,
-// we define Start = LFENCE/RDTSC/LFENCE; Stop = RDTSCP/LFENCE.
-//
-// Using Start+Start leads to higher variance and overhead than Stop+Stop.
-// However, Stop+Stop includes an LFENCE in the region measurements, which
-// adds a delay dependent on earlier loads. The combination of Start+Stop
-// is faster than Start+Start and more consistent than Stop+Stop because
-// the first LFENCE already delayed subsequent loads before the measured
-// region. This combination seems not to have been considered in prior work:
-// http://akaros.cs.berkeley.edu/lxr/akaros/kern/arch/x86/rdtsc_test.c
-//
-// Note: performance counters can measure 'exact' instructions-retired or
-// (unhalted) cycle counts. The RDPMC instruction is not serializing and also
-// requires fences. Unfortunately, it is not accessible on all OSes and we
-// prefer to avoid kernel-mode drivers. Performance counters are also affected
-// by several under/over-count errata, so we use the TSC instead.
-
-// Returns a 64-bit timestamp in unit of 'ticks'; to convert to seconds,
-// divide by InvariantTicksPerSecond.
-inline uint64_t Start64() {
-  uint64_t t;
-#if defined(ABSL_ARCH_PPC)
-  asm volatile("mfspr %0, %1" : "=r"(t) : "i"(268));
-#elif defined(ABSL_ARCH_X86_64)
-#if defined(ABSL_OS_WIN)
-  _ReadWriteBarrier();
-  _mm_lfence();
-  _ReadWriteBarrier();
-  t = __rdtsc();
-  _ReadWriteBarrier();
-  _mm_lfence();
-  _ReadWriteBarrier();
-#else
-  asm volatile(
-      "lfence\n\t"
-      "rdtsc\n\t"
-      "shl $32, %%rdx\n\t"
-      "or %%rdx, %0\n\t"
-      "lfence"
-      : "=a"(t)
-      :
-      // "memory" avoids reordering. rdx = TSC >> 32.
-      // "cc" = flags modified by SHL.
-      : "rdx", "memory", "cc");
-#endif
-#else
-  // Fall back to OS - unsure how to reliably query cntvct_el0 frequency.
-  timespec ts;
-  clock_gettime(CLOCK_REALTIME, &ts);
-  t = ts.tv_sec * 1000000000LL + ts.tv_nsec;
-#endif
-  return t;
-}
-
-inline uint64_t Stop64() {
-  uint64_t t;
-#if defined(ABSL_ARCH_X86_64)
-#if defined(ABSL_OS_WIN)
-  _ReadWriteBarrier();
-  unsigned aux;
-  t = __rdtscp(&aux);
-  _ReadWriteBarrier();
-  _mm_lfence();
-  _ReadWriteBarrier();
-#else
-  // Use inline asm because __rdtscp generates code to store TSC_AUX (ecx).
-  asm volatile(
-      "rdtscp\n\t"
-      "shl $32, %%rdx\n\t"
-      "or %%rdx, %0\n\t"
-      "lfence"
-      : "=a"(t)
-      :
-      // "memory" avoids reordering. rcx = TSC_AUX. rdx = TSC >> 32.
-      // "cc" = flags modified by SHL.
-      : "rcx", "rdx", "memory", "cc");
-#endif
-#else
-  t = Start64();
-#endif
-  return t;
-}
-
-// Returns a 32-bit timestamp with about 4 cycles less overhead than
-// Start64. Only suitable for measuring very short regions because the
-// timestamp overflows about once a second.
-inline uint32_t Start32() {
-  uint32_t t;
-#if defined(ABSL_ARCH_X86_64)
-#if defined(ABSL_OS_WIN)
-  _ReadWriteBarrier();
-  _mm_lfence();
-  _ReadWriteBarrier();
-  t = static_cast<uint32_t>(__rdtsc());
-  _ReadWriteBarrier();
-  _mm_lfence();
-  _ReadWriteBarrier();
-#else
-  asm volatile(
-      "lfence\n\t"
-      "rdtsc\n\t"
-      "lfence"
-      : "=a"(t)
-      :
-      // "memory" avoids reordering. rdx = TSC >> 32.
-      : "rdx", "memory");
-#endif
-#else
-  t = static_cast<uint32_t>(Start64());
-#endif
-  return t;
-}
-
-inline uint32_t Stop32() {
-  uint32_t t;
-#if defined(ABSL_ARCH_X86_64)
-#if defined(ABSL_OS_WIN)
-  _ReadWriteBarrier();
-  unsigned aux;
-  t = static_cast<uint32_t>(__rdtscp(&aux));
-  _ReadWriteBarrier();
-  _mm_lfence();
-  _ReadWriteBarrier();
-#else
-  // Use inline asm because __rdtscp generates code to store TSC_AUX (ecx).
-  asm volatile(
-      "rdtscp\n\t"
-      "lfence"
-      : "=a"(t)
-      :
-      // "memory" avoids reordering. rcx = TSC_AUX. rdx = TSC >> 32.
-      : "rcx", "rdx", "memory");
-#endif
-#else
-  t = static_cast<uint32_t>(Stop64());
-#endif
-  return t;
-}
-
-}  // namespace timer
-
-namespace robust_statistics {
-
-// Sorts integral values in ascending order (e.g. for Mode). About 3x faster
-// than std::sort for input distributions with very few unique values.
-template <class T>
-void CountingSort(T* values, size_t num_values) {
-  // Unique values and their frequency (similar to flat_map).
-  using Unique = std::pair<T, int>;
-  std::vector<Unique> unique;
-  for (size_t i = 0; i < num_values; ++i) {
-    const T value = values[i];
-    const auto pos =
-        std::find_if(unique.begin(), unique.end(),
-                     [value](const Unique u) { return u.first == value; });
-    if (pos == unique.end()) {
-      unique.push_back(std::make_pair(value, 1));
-    } else {
-      ++pos->second;
-    }
-  }
-
-  // Sort in ascending order of value (pair.first).
-  std::sort(unique.begin(), unique.end());
-
-  // Write that many copies of each unique value to the array.
-  T* ABSL_RANDOM_INTERNAL_RESTRICT p = values;
-  for (const auto& value_count : unique) {
-    std::fill(p, p + value_count.second, value_count.first);
-    p += value_count.second;
-  }
-  ABSL_RAW_CHECK(p == values + num_values, "Did not produce enough output");
-}
-
-// @return i in [idx_begin, idx_begin + half_count) that minimizes
-// sorted[i + half_count] - sorted[i].
-template <typename T>
-size_t MinRange(const T* const ABSL_RANDOM_INTERNAL_RESTRICT sorted,
-                const size_t idx_begin, const size_t half_count) {
-  T min_range = (std::numeric_limits<T>::max)();
-  size_t min_idx = 0;
-
-  for (size_t idx = idx_begin; idx < idx_begin + half_count; ++idx) {
-    ABSL_RAW_CHECK(sorted[idx] <= sorted[idx + half_count], "Not sorted");
-    const T range = sorted[idx + half_count] - sorted[idx];
-    if (range < min_range) {
-      min_range = range;
-      min_idx = idx;
-    }
-  }
-
-  return min_idx;
-}
-
-// Returns an estimate of the mode by calling MinRange on successively
-// halved intervals. "sorted" must be in ascending order. This is the
-// Half Sample Mode estimator proposed by Bickel in "On a fast, robust
-// estimator of the mode", with complexity O(N log N). The mode is less
-// affected by outliers in highly-skewed distributions than the median.
-// The averaging operation below assumes "T" is an unsigned integer type.
-template <typename T>
-T ModeOfSorted(const T* const ABSL_RANDOM_INTERNAL_RESTRICT sorted,
-               const size_t num_values) {
-  size_t idx_begin = 0;
-  size_t half_count = num_values / 2;
-  while (half_count > 1) {
-    idx_begin = MinRange(sorted, idx_begin, half_count);
-    half_count >>= 1;
-  }
-
-  const T x = sorted[idx_begin + 0];
-  if (half_count == 0) {
-    return x;
-  }
-  ABSL_RAW_CHECK(half_count == 1, "Should stop at half_count=1");
-  const T average = (x + sorted[idx_begin + 1] + 1) / 2;
-  return average;
-}
-
-// Returns the mode. Side effect: sorts "values".
-template <typename T>
-T Mode(T* values, const size_t num_values) {
-  CountingSort(values, num_values);
-  return ModeOfSorted(values, num_values);
-}
-
-template <typename T, size_t N>
-T Mode(T (&values)[N]) {
-  return Mode(&values[0], N);
-}
-
-// Returns the median value. Side effect: sorts "values".
-template <typename T>
-T Median(T* values, const size_t num_values) {
-  ABSL_RAW_CHECK(num_values != 0, "Empty input");
-  std::sort(values, values + num_values);
-  const size_t half = num_values / 2;
-  // Odd count: return middle
-  if (num_values % 2) {
-    return values[half];
-  }
-  // Even count: return average of middle two.
-  return (values[half] + values[half - 1] + 1) / 2;
-}
-
-// Returns a robust measure of variability.
-template <typename T>
-T MedianAbsoluteDeviation(const T* values, const size_t num_values,
-                          const T median) {
-  ABSL_RAW_CHECK(num_values != 0, "Empty input");
-  std::vector<T> abs_deviations;
-  abs_deviations.reserve(num_values);
-  for (size_t i = 0; i < num_values; ++i) {
-    const int64_t abs = std::abs(int64_t(values[i]) - int64_t(median));
-    abs_deviations.push_back(static_cast<T>(abs));
-  }
-  return Median(abs_deviations.data(), num_values);
-}
-
-}  // namespace robust_statistics
-
-// Ticks := platform-specific timer values (CPU cycles on x86). Must be
-// unsigned to guarantee wraparound on overflow. 32 bit timers are faster to
-// read than 64 bit.
-using Ticks = uint32_t;
-
-// Returns timer overhead / minimum measurable difference.
-Ticks TimerResolution() {
-  // Nested loop avoids exceeding stack/L1 capacity.
-  Ticks repetitions[Params::kTimerSamples];
-  for (size_t rep = 0; rep < Params::kTimerSamples; ++rep) {
-    Ticks samples[Params::kTimerSamples];
-    for (size_t i = 0; i < Params::kTimerSamples; ++i) {
-      const Ticks t0 = timer::Start32();
-      const Ticks t1 = timer::Stop32();
-      samples[i] = t1 - t0;
-    }
-    repetitions[rep] = robust_statistics::Mode(samples);
-  }
-  return robust_statistics::Mode(repetitions);
-}
-
-static const Ticks timer_resolution = TimerResolution();
-
-// Estimates the expected value of "lambda" values with a variable number of
-// samples until the variability "rel_mad" is less than "max_rel_mad".
-template <class Lambda>
-Ticks SampleUntilStable(const double max_rel_mad, double* rel_mad,
-                        const Params& p, const Lambda& lambda) {
-  auto measure_duration = [&lambda]() -> Ticks {
-    const Ticks t0 = timer::Start32();
-    lambda();
-    const Ticks t1 = timer::Stop32();
-    return t1 - t0;
-  };
-
-  // Choose initial samples_per_eval based on a single estimated duration.
-  Ticks est = measure_duration();
-  static const double ticks_per_second = InvariantTicksPerSecond();
-  const size_t ticks_per_eval = ticks_per_second * p.seconds_per_eval;
-  size_t samples_per_eval = ticks_per_eval / est;
-  samples_per_eval = (std::max)(samples_per_eval, p.min_samples_per_eval);
-
-  std::vector<Ticks> samples;
-  samples.reserve(1 + samples_per_eval);
-  samples.push_back(est);
-
-  // Percentage is too strict for tiny differences, so also allow a small
-  // absolute "median absolute deviation".
-  const Ticks max_abs_mad = (timer_resolution + 99) / 100;
-  *rel_mad = 0.0;  // ensure initialized
-
-  for (size_t eval = 0; eval < p.max_evals; ++eval, samples_per_eval *= 2) {
-    samples.reserve(samples.size() + samples_per_eval);
-    for (size_t i = 0; i < samples_per_eval; ++i) {
-      const Ticks r = measure_duration();
-      samples.push_back(r);
-    }
-
-    if (samples.size() >= p.min_mode_samples) {
-      est = robust_statistics::Mode(samples.data(), samples.size());
-    } else {
-      // For "few" (depends also on the variance) samples, Median is safer.
-      est = robust_statistics::Median(samples.data(), samples.size());
-    }
-    ABSL_RAW_CHECK(est != 0, "Estimator returned zero duration");
-
-    // Median absolute deviation (mad) is a robust measure of 'variability'.
-    const Ticks abs_mad = robust_statistics::MedianAbsoluteDeviation(
-        samples.data(), samples.size(), est);
-    *rel_mad = static_cast<double>(static_cast<int>(abs_mad)) / est;
-
-    if (*rel_mad <= max_rel_mad || abs_mad <= max_abs_mad) {
-      if (p.verbose) {
-        ABSL_RAW_LOG(INFO,
-                     "%6zu samples => %5u (abs_mad=%4u, rel_mad=%4.2f%%)\n",
-                     samples.size(), est, abs_mad, *rel_mad * 100.0);
-      }
-      return est;
-    }
-  }
-
-  if (p.verbose) {
-    ABSL_RAW_LOG(WARNING,
-                 "rel_mad=%4.2f%% still exceeds %4.2f%% after %6zu samples.\n",
-                 *rel_mad * 100.0, max_rel_mad * 100.0, samples.size());
-  }
-  return est;
-}
-
-using InputVec = std::vector<FuncInput>;
-
-// Returns vector of unique input values.
-InputVec UniqueInputs(const FuncInput* inputs, const size_t num_inputs) {
-  InputVec unique(inputs, inputs + num_inputs);
-  std::sort(unique.begin(), unique.end());
-  unique.erase(std::unique(unique.begin(), unique.end()), unique.end());
-  return unique;
-}
-
-// Returns how often we need to call func for sufficient precision, or zero
-// on failure (e.g. the elapsed time is too long for a 32-bit tick count).
-size_t NumSkip(const Func func, const void* arg, const InputVec& unique,
-               const Params& p) {
-  // Min elapsed ticks for any input.
-  Ticks min_duration = ~0u;
-
-  for (const FuncInput input : unique) {
-    // Make sure a 32-bit timer is sufficient.
-    const uint64_t t0 = timer::Start64();
-    PreventElision(func(arg, input));
-    const uint64_t t1 = timer::Stop64();
-    const uint64_t elapsed = t1 - t0;
-    if (elapsed >= (1ULL << 30)) {
-      ABSL_RAW_LOG(WARNING,
-                   "Measurement failed: need 64-bit timer for input=%zu\n",
-                   static_cast<size_t>(input));
-      return 0;
-    }
-
-    double rel_mad;
-    const Ticks total = SampleUntilStable(
-        p.target_rel_mad, &rel_mad, p,
-        [func, arg, input]() { PreventElision(func(arg, input)); });
-    min_duration = (std::min)(min_duration, total - timer_resolution);
-  }
-
-  // Number of repetitions required to reach the target resolution.
-  const size_t max_skip = p.precision_divisor;
-  // Number of repetitions given the estimated duration.
-  const size_t num_skip =
-      min_duration == 0 ? 0 : (max_skip + min_duration - 1) / min_duration;
-  if (p.verbose) {
-    ABSL_RAW_LOG(INFO, "res=%u max_skip=%zu min_dur=%u num_skip=%zu\n",
-                 timer_resolution, max_skip, min_duration, num_skip);
-  }
-  return num_skip;
-}
-
-// Replicates inputs until we can omit "num_skip" occurrences of an input.
-InputVec ReplicateInputs(const FuncInput* inputs, const size_t num_inputs,
-                         const size_t num_unique, const size_t num_skip,
-                         const Params& p) {
-  InputVec full;
-  if (num_unique == 1) {
-    full.assign(p.subset_ratio * num_skip, inputs[0]);
-    return full;
-  }
-
-  full.reserve(p.subset_ratio * num_skip * num_inputs);
-  for (size_t i = 0; i < p.subset_ratio * num_skip; ++i) {
-    full.insert(full.end(), inputs, inputs + num_inputs);
-  }
-  absl::random_internal::randen_engine<uint32_t> rng;
-  std::shuffle(full.begin(), full.end(), rng);
-  return full;
-}
-
-// Copies the "full" to "subset" in the same order, but with "num_skip"
-// randomly selected occurrences of "input_to_skip" removed.
-void FillSubset(const InputVec& full, const FuncInput input_to_skip,
-                const size_t num_skip, InputVec* subset) {
-  const size_t count = std::count(full.begin(), full.end(), input_to_skip);
-  // Generate num_skip random indices: which occurrence to skip.
-  std::vector<uint32_t> omit;
-  // Replacement for std::iota, not yet available in MSVC builds.
-  omit.reserve(count);
-  for (size_t i = 0; i < count; ++i) {
-    omit.push_back(i);
-  }
-  // omit[] is the same on every call, but that's OK because they identify the
-  // Nth instance of input_to_skip, so the position within full[] differs.
-  absl::random_internal::randen_engine<uint32_t> rng;
-  std::shuffle(omit.begin(), omit.end(), rng);
-  omit.resize(num_skip);
-  std::sort(omit.begin(), omit.end());
-
-  uint32_t occurrence = ~0u;  // 0 after preincrement
-  size_t idx_omit = 0;        // cursor within omit[]
-  size_t idx_subset = 0;      // cursor within *subset
-  for (const FuncInput next : full) {
-    if (next == input_to_skip) {
-      ++occurrence;
-      // Haven't removed enough already
-      if (idx_omit < num_skip) {
-        // This one is up for removal
-        if (occurrence == omit[idx_omit]) {
-          ++idx_omit;
-          continue;
-        }
-      }
-    }
-    if (idx_subset < subset->size()) {
-      (*subset)[idx_subset++] = next;
-    }
-  }
-  ABSL_RAW_CHECK(idx_subset == subset->size(), "idx_subset not at end");
-  ABSL_RAW_CHECK(idx_omit == omit.size(), "idx_omit not at end");
-  ABSL_RAW_CHECK(occurrence == count - 1, "occurrence not at end");
-}
-
-// Returns total ticks elapsed for all inputs.
-Ticks TotalDuration(const Func func, const void* arg, const InputVec* inputs,
-                    const Params& p, double* max_rel_mad) {
-  double rel_mad;
-  const Ticks duration =
-      SampleUntilStable(p.target_rel_mad, &rel_mad, p, [func, arg, inputs]() {
-        for (const FuncInput input : *inputs) {
-          PreventElision(func(arg, input));
-        }
-      });
-  *max_rel_mad = (std::max)(*max_rel_mad, rel_mad);
-  return duration;
-}
-
-// (Nearly) empty Func for measuring timer overhead/resolution.
-ABSL_RANDOM_INTERNAL_ATTRIBUTE_NEVER_INLINE FuncOutput
-EmptyFunc(const void* arg, const FuncInput input) {
-  return input;
-}
-
-// Returns overhead of accessing inputs[] and calling a function; this will
-// be deducted from future TotalDuration return values.
-Ticks Overhead(const void* arg, const InputVec* inputs, const Params& p) {
-  double rel_mad;
-  // Zero tolerance because repeatability is crucial and EmptyFunc is fast.
-  return SampleUntilStable(0.0, &rel_mad, p, [arg, inputs]() {
-    for (const FuncInput input : *inputs) {
-      PreventElision(EmptyFunc(arg, input));
-    }
-  });
-}
-
-}  // namespace
-
-void PinThreadToCPU(int cpu) {
-  // We might migrate to another CPU before pinning below, but at least cpu
-  // will be one of the CPUs on which this thread ran.
-#if defined(ABSL_OS_WIN)
-  if (cpu < 0) {
-    cpu = static_cast<int>(GetCurrentProcessorNumber());
-    ABSL_RAW_CHECK(cpu >= 0, "PinThreadToCPU detect failed");
-    if (cpu >= 64) {
-      // NOTE: On wine, at least, GetCurrentProcessorNumber() sometimes returns
-      // a value > 64, which is out of range. When this happens, log a message
-      // and don't set a cpu affinity.
-      ABSL_RAW_LOG(ERROR, "Invalid CPU number: %d", cpu);
-      return;
-    }
-  } else if (cpu >= 64) {
-    // User specified an explicit CPU affinity > the valid range.
-    ABSL_RAW_LOG(FATAL, "Invalid CPU number: %d", cpu);
-  }
-  const DWORD_PTR prev = SetThreadAffinityMask(GetCurrentThread(), 1ULL << cpu);
-  ABSL_RAW_CHECK(prev != 0, "SetAffinity failed");
-#elif defined(ABSL_OS_LINUX) && !defined(ABSL_OS_ANDROID)
-  if (cpu < 0) {
-    cpu = sched_getcpu();
-    ABSL_RAW_CHECK(cpu >= 0, "PinThreadToCPU detect failed");
-  }
-  const pid_t pid = 0;  // current thread
-  cpu_set_t set;
-  CPU_ZERO(&set);
-  CPU_SET(cpu, &set);
-  const int err = sched_setaffinity(pid, sizeof(set), &set);
-  ABSL_RAW_CHECK(err == 0, "SetAffinity failed");
-#endif
-}
-
-// Returns tick rate. Invariant means the tick counter frequency is independent
-// of CPU throttling or sleep. May be expensive, caller should cache the result.
-double InvariantTicksPerSecond() {
-#if defined(ABSL_ARCH_PPC)
-  return __ppc_get_timebase_freq();
-#elif defined(ABSL_ARCH_X86_64)
-  // We assume the TSC is invariant; it is on all recent Intel/AMD CPUs.
-  return platform::NominalClockRate();
-#else
-  // Fall back to clock_gettime nanoseconds.
-  return 1E9;
-#endif
-}
-
-size_t MeasureImpl(const Func func, const void* arg, const size_t num_skip,
-                   const InputVec& unique, const InputVec& full,
-                   const Params& p, Result* results) {
-  const float mul = 1.0f / static_cast<int>(num_skip);
-
-  InputVec subset(full.size() - num_skip);
-  const Ticks overhead = Overhead(arg, &full, p);
-  const Ticks overhead_skip = Overhead(arg, &subset, p);
-  if (overhead < overhead_skip) {
-    ABSL_RAW_LOG(WARNING, "Measurement failed: overhead %u < %u\n", overhead,
-                 overhead_skip);
-    return 0;
-  }
-
-  if (p.verbose) {
-    ABSL_RAW_LOG(INFO, "#inputs=%5zu,%5zu overhead=%5u,%5u\n", full.size(),
-                 subset.size(), overhead, overhead_skip);
-  }
-
-  double max_rel_mad = 0.0;
-  const Ticks total = TotalDuration(func, arg, &full, p, &max_rel_mad);
-
-  for (size_t i = 0; i < unique.size(); ++i) {
-    FillSubset(full, unique[i], num_skip, &subset);
-    const Ticks total_skip = TotalDuration(func, arg, &subset, p, &max_rel_mad);
-
-    if (total < total_skip) {
-      ABSL_RAW_LOG(WARNING, "Measurement failed: total %u < %u\n", total,
-                   total_skip);
-      return 0;
-    }
-
-    const Ticks duration = (total - overhead) - (total_skip - overhead_skip);
-    results[i].input = unique[i];
-    results[i].ticks = duration * mul;
-    results[i].variability = max_rel_mad;
-  }
-
-  return unique.size();
-}
-
-size_t Measure(const Func func, const void* arg, const FuncInput* inputs,
-               const size_t num_inputs, Result* results, const Params& p) {
-  ABSL_RAW_CHECK(num_inputs != 0, "No inputs");
-
-  const InputVec unique = UniqueInputs(inputs, num_inputs);
-  const size_t num_skip = NumSkip(func, arg, unique, p);  // never 0
-  if (num_skip == 0) return 0;  // NumSkip already printed error message
-
-  const InputVec full =
-      ReplicateInputs(inputs, num_inputs, unique.size(), num_skip, p);
-
-  // MeasureImpl may fail up to p.max_measure_retries times.
-  for (size_t i = 0; i < p.max_measure_retries; i++) {
-    auto result = MeasureImpl(func, arg, num_skip, unique, full, p, results);
-    if (result != 0) {
-      return result;
-    }
-  }
-  // All retries failed. (Unusual)
-  return 0;
-}
-
-}  // namespace random_internal_nanobenchmark
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/nanobenchmark.h b/third_party/abseil/absl/random/internal/nanobenchmark.h
deleted file mode 100644
index a5097ba..0000000
--- a/third_party/abseil/absl/random/internal/nanobenchmark.h
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_NANOBENCHMARK_H_
-#define ABSL_RANDOM_INTERNAL_NANOBENCHMARK_H_
-
-// Benchmarks functions of a single integer argument with realistic branch
-// prediction hit rates. Uses a robust estimator to summarize the measurements.
-// The precision is about 0.2%.
-//
-// Examples: see nanobenchmark_test.cc.
-//
-// Background: Microbenchmarks such as http://github.com/google/benchmark
-// can measure elapsed times on the order of a microsecond. Shorter functions
-// are typically measured by repeating them thousands of times and dividing
-// the total elapsed time by this count. Unfortunately, repetition (especially
-// with the same input parameter!) influences the runtime. In time-critical
-// code, it is reasonable to expect warm instruction/data caches and TLBs,
-// but a perfect record of which branches will be taken is unrealistic.
-// Unless the application also repeatedly invokes the measured function with
-// the same parameter, the benchmark is measuring something very different -
-// a best-case result, almost as if the parameter were made a compile-time
-// constant. This may lead to erroneous conclusions about branch-heavy
-// algorithms outperforming branch-free alternatives.
-//
-// Our approach differs in three ways. Adding fences to the timer functions
-// reduces variability due to instruction reordering, improving the timer
-// resolution to about 40 CPU cycles. However, shorter functions must still
-// be invoked repeatedly. For more realistic branch prediction performance,
-// we vary the input parameter according to a user-specified distribution.
-// Thus, instead of VaryInputs(Measure(Repeat(func))), we change the
-// loop nesting to Measure(Repeat(VaryInputs(func))). We also estimate the
-// central tendency of the measurement samples with the "half sample mode",
-// which is more robust to outliers and skewed data than the mean or median.
-
-// NOTE: for compatibility with multiple translation units compiled with
-// distinct flags, avoid #including headers that define functions.
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal_nanobenchmark {
-
-// Input influencing the function being measured (e.g. number of bytes to copy).
-using FuncInput = size_t;
-
-// "Proof of work" returned by Func to ensure the compiler does not elide it.
-using FuncOutput = uint64_t;
-
-// Function to measure: either 1) a captureless lambda or function with two
-// arguments or 2) a lambda with capture, in which case the first argument
-// is reserved for use by MeasureClosure.
-using Func = FuncOutput (*)(const void*, FuncInput);
-
-// Internal parameters that determine precision/resolution/measuring time.
-struct Params {
-  // For measuring timer overhead/resolution. Used in a nested loop =>
-  // quadratic time, acceptable because we know timer overhead is "low".
-  // constexpr because this is used to define array bounds.
-  static constexpr size_t kTimerSamples = 256;
-
-  // Best-case precision, expressed as a divisor of the timer resolution.
-  // Larger => more calls to Func and higher precision.
-  size_t precision_divisor = 1024;
-
-  // Ratio between full and subset input distribution sizes. Cannot be less
-  // than 2; larger values increase measurement time but more faithfully
-  // model the given input distribution.
-  size_t subset_ratio = 2;
-
-  // Together with the estimated Func duration, determines how many times to
-  // call Func before checking the sample variability. Larger values increase
-  // measurement time, memory/cache use and precision.
-  double seconds_per_eval = 4E-3;
-
-  // The minimum number of samples before estimating the central tendency.
-  size_t min_samples_per_eval = 7;
-
-  // The mode is better than median for estimating the central tendency of
-  // skewed/fat-tailed distributions, but it requires sufficient samples
-  // relative to the width of half-ranges.
-  size_t min_mode_samples = 64;
-
-  // Maximum permissible variability (= median absolute deviation / center).
-  double target_rel_mad = 0.002;
-
-  // Abort after this many evals without reaching target_rel_mad. This
-  // prevents infinite loops.
-  size_t max_evals = 9;
-
-  // Retry the measure loop up to this many times.
-  size_t max_measure_retries = 2;
-
-  // Whether to print additional statistics to stdout.
-  bool verbose = true;
-};
-
-// Measurement result for each unique input.
-struct Result {
-  FuncInput input;
-
-  // Robust estimate (mode or median) of duration.
-  float ticks;
-
-  // Measure of variability (median absolute deviation relative to "ticks").
-  float variability;
-};
-
-// Ensures the thread is running on the specified cpu, and no others.
-// Reduces noise due to desynchronized socket RDTSC and context switches.
-// If "cpu" is negative, pin to the currently running core.
-void PinThreadToCPU(const int cpu = -1);
-
-// Returns tick rate, useful for converting measurements to seconds. Invariant
-// means the tick counter frequency is independent of CPU throttling or sleep.
-// This call may be expensive, callers should cache the result.
-double InvariantTicksPerSecond();
-
-// Precisely measures the number of ticks elapsed when calling "func" with the
-// given inputs, shuffled to ensure realistic branch prediction hit rates.
-//
-// "func" returns a 'proof of work' to ensure its computations are not elided.
-// "arg" is passed to Func, or reserved for internal use by MeasureClosure.
-// "inputs" is an array of "num_inputs" (not necessarily unique) arguments to
-//   "func". The values should be chosen to maximize coverage of "func". This
-//   represents a distribution, so a value's frequency should reflect its
-//   probability in the real application. Order does not matter; for example, a
-//   uniform distribution over [0, 4) could be represented as {3,0,2,1}.
-// Returns how many Result were written to "results": one per unique input, or
-//   zero if the measurement failed (an error message goes to stderr).
-size_t Measure(const Func func, const void* arg, const FuncInput* inputs,
-               const size_t num_inputs, Result* results,
-               const Params& p = Params());
-
-// Calls operator() of the given closure (lambda function).
-template <class Closure>
-static FuncOutput CallClosure(const void* f, const FuncInput input) {
-  return (*reinterpret_cast<const Closure*>(f))(input);
-}
-
-// Same as Measure, except "closure" is typically a lambda function of
-// FuncInput -> FuncOutput with a capture list.
-template <class Closure>
-static inline size_t MeasureClosure(const Closure& closure,
-                                    const FuncInput* inputs,
-                                    const size_t num_inputs, Result* results,
-                                    const Params& p = Params()) {
-  return Measure(reinterpret_cast<Func>(&CallClosure<Closure>),
-                 reinterpret_cast<const void*>(&closure), inputs, num_inputs,
-                 results, p);
-}
-
-}  // namespace random_internal_nanobenchmark
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_NANOBENCHMARK_H_
diff --git a/third_party/abseil/absl/random/internal/nanobenchmark_test.cc b/third_party/abseil/absl/random/internal/nanobenchmark_test.cc
deleted file mode 100644
index f1571e2..0000000
--- a/third_party/abseil/absl/random/internal/nanobenchmark_test.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/nanobenchmark.h"
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/numbers.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal_nanobenchmark {
-namespace {
-
-uint64_t Div(const void*, FuncInput in) {
-  // Here we're measuring the throughput because benchmark invocations are
-  // independent.
-  const int64_t d1 = 0xFFFFFFFFFFll / int64_t(in);  // IDIV
-  return d1;
-}
-
-template <size_t N>
-void MeasureDiv(const FuncInput (&inputs)[N]) {
-  Result results[N];
-  Params params;
-  params.max_evals = 6;  // avoid test timeout
-  const size_t num_results = Measure(&Div, nullptr, inputs, N, results, params);
-  if (num_results == 0) {
-    ABSL_RAW_LOG(
-        WARNING,
-        "WARNING: Measurement failed, should not happen when using "
-        "PinThreadToCPU unless the region to measure takes > 1 second.\n");
-    return;
-  }
-  for (size_t i = 0; i < num_results; ++i) {
-    ABSL_RAW_LOG(INFO, "%5zu: %6.2f ticks; MAD=%4.2f%%\n", results[i].input,
-                 results[i].ticks, results[i].variability * 100.0);
-    ABSL_RAW_CHECK(results[i].ticks != 0.0f, "Zero duration");
-  }
-}
-
-void RunAll(const int argc, char* argv[]) {
-  // Avoid migrating between cores - important on multi-socket systems.
-  int cpu = -1;
-  if (argc == 2) {
-    if (!absl::SimpleAtoi(argv[1], &cpu)) {
-      ABSL_RAW_LOG(FATAL, "The optional argument must be a CPU number >= 0.\n");
-    }
-  }
-  PinThreadToCPU(cpu);
-
-  // unpredictable == 1 but the compiler doesn't know that.
-  const FuncInput unpredictable = argc != 999;
-  static const FuncInput inputs[] = {unpredictable * 10, unpredictable * 100};
-
-  MeasureDiv(inputs);
-}
-
-}  // namespace
-}  // namespace random_internal_nanobenchmark
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-int main(int argc, char* argv[]) {
-  absl::random_internal_nanobenchmark::RunAll(argc, argv);
-  return 0;
-}
diff --git a/third_party/abseil/absl/random/internal/nonsecure_base.h b/third_party/abseil/absl/random/internal/nonsecure_base.h
deleted file mode 100644
index 730fa2e..0000000
--- a/third_party/abseil/absl/random/internal/nonsecure_base.h
+++ /dev/null
@@ -1,150 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_NONSECURE_BASE_H_
-#define ABSL_RANDOM_INTERNAL_NONSECURE_BASE_H_
-
-#include <algorithm>
-#include <cstdint>
-#include <iostream>
-#include <iterator>
-#include <random>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/pool_urbg.h"
-#include "absl/random/internal/salted_seed_seq.h"
-#include "absl/random/internal/seed_material.h"
-#include "absl/types/optional.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Each instance of NonsecureURBGBase<URBG> will be seeded by variates produced
-// by a thread-unique URBG-instance.
-template <typename URBG>
-class NonsecureURBGBase {
- public:
-  using result_type = typename URBG::result_type;
-
-  // Default constructor
-  NonsecureURBGBase() : urbg_(ConstructURBG()) {}
-
-  // Copy disallowed, move allowed.
-  NonsecureURBGBase(const NonsecureURBGBase&) = delete;
-  NonsecureURBGBase& operator=(const NonsecureURBGBase&) = delete;
-  NonsecureURBGBase(NonsecureURBGBase&&) = default;
-  NonsecureURBGBase& operator=(NonsecureURBGBase&&) = default;
-
-  // Constructor using a seed
-  template <class SSeq, typename = typename absl::enable_if_t<
-                            !std::is_same<SSeq, NonsecureURBGBase>::value>>
-  explicit NonsecureURBGBase(SSeq&& seq)
-      : urbg_(ConstructURBG(std::forward<SSeq>(seq))) {}
-
-  // Note: on MSVC, min() or max() can be interpreted as MIN() or MAX(), so we
-  // enclose min() or max() in parens as (min)() and (max)().
-  // Additionally, clang-format requires no space before this construction.
-
-  // NonsecureURBGBase::min()
-  static constexpr result_type(min)() { return (URBG::min)(); }
-
-  // NonsecureURBGBase::max()
-  static constexpr result_type(max)() { return (URBG::max)(); }
-
-  // NonsecureURBGBase::operator()()
-  result_type operator()() { return urbg_(); }
-
-  // NonsecureURBGBase::discard()
-  void discard(unsigned long long values) {  // NOLINT(runtime/int)
-    urbg_.discard(values);
-  }
-
-  bool operator==(const NonsecureURBGBase& other) const {
-    return urbg_ == other.urbg_;
-  }
-
-  bool operator!=(const NonsecureURBGBase& other) const {
-    return !(urbg_ == other.urbg_);
-  }
-
- private:
-  // Seeder is a custom seed sequence type where generate() fills the provided
-  // buffer via the RandenPool entropy source.
-  struct Seeder {
-    using result_type = uint32_t;
-
-    size_t size() { return 0; }
-
-    template <typename OutIterator>
-    void param(OutIterator) const {}
-
-    template <typename RandomAccessIterator>
-    void generate(RandomAccessIterator begin, RandomAccessIterator end) {
-      if (begin != end) {
-        // begin, end must be random access iterators assignable from uint32_t.
-        generate_impl(
-            std::integral_constant<bool, sizeof(*begin) == sizeof(uint32_t)>{},
-            begin, end);
-      }
-    }
-
-    // Commonly, generate is invoked with a pointer to a buffer which
-    // can be cast to a uint32_t.
-    template <typename RandomAccessIterator>
-    void generate_impl(std::integral_constant<bool, true>,
-                       RandomAccessIterator begin, RandomAccessIterator end) {
-      auto buffer = absl::MakeSpan(begin, end);
-      auto target = absl::MakeSpan(reinterpret_cast<uint32_t*>(buffer.data()),
-                                   buffer.size());
-      RandenPool<uint32_t>::Fill(target);
-    }
-
-    // The non-uint32_t case should be uncommon, and involves an extra copy,
-    // filling the uint32_t buffer and then mixing into the output.
-    template <typename RandomAccessIterator>
-    void generate_impl(std::integral_constant<bool, false>,
-                       RandomAccessIterator begin, RandomAccessIterator end) {
-      const size_t n = std::distance(begin, end);
-      absl::InlinedVector<uint32_t, 8> data(n, 0);
-      RandenPool<uint32_t>::Fill(absl::MakeSpan(data.begin(), data.end()));
-      std::copy(std::begin(data), std::end(data), begin);
-    }
-  };
-
-  static URBG ConstructURBG() {
-    Seeder seeder;
-    return URBG(seeder);
-  }
-
-  template <typename SSeq>
-  static URBG ConstructURBG(SSeq&& seq) {  // NOLINT(runtime/references)
-    auto salted_seq =
-        random_internal::MakeSaltedSeedSeq(std::forward<SSeq>(seq));
-    return URBG(salted_seq);
-  }
-
-  URBG urbg_;
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_NONSECURE_BASE_H_
diff --git a/third_party/abseil/absl/random/internal/nonsecure_base_test.cc b/third_party/abseil/absl/random/internal/nonsecure_base_test.cc
deleted file mode 100644
index 698027f..0000000
--- a/third_party/abseil/absl/random/internal/nonsecure_base_test.cc
+++ /dev/null
@@ -1,245 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/nonsecure_base.h"
-
-#include <algorithm>
-#include <iostream>
-#include <memory>
-#include <random>
-#include <sstream>
-
-#include "gtest/gtest.h"
-#include "absl/random/distributions.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-using ExampleNonsecureURBG =
-    absl::random_internal::NonsecureURBGBase<std::mt19937>;
-
-template <typename T>
-void Use(const T&) {}
-
-}  // namespace
-
-TEST(NonsecureURBGBase, DefaultConstructorIsValid) {
-  ExampleNonsecureURBG urbg;
-}
-
-// Ensure that the recommended template-instantiations are valid.
-TEST(RecommendedTemplates, CanBeConstructed) {
-  absl::BitGen default_generator;
-  absl::InsecureBitGen insecure_generator;
-}
-
-TEST(RecommendedTemplates, CanDiscardValues) {
-  absl::BitGen default_generator;
-  absl::InsecureBitGen insecure_generator;
-
-  default_generator.discard(5);
-  insecure_generator.discard(5);
-}
-
-TEST(NonsecureURBGBase, StandardInterface) {
-  // Names after definition of [rand.req.urbg] in C++ standard.
-  // e us a value of E
-  // v is a lvalue of E
-  // x, y are possibly const values of E
-  // s is a value of T
-  // q is a value satisfying requirements of seed_sequence
-  // z is a value of type unsigned long long
-  // os is a some specialization of basic_ostream
-  // is is a some specialization of basic_istream
-
-  using E = absl::random_internal::NonsecureURBGBase<std::minstd_rand>;
-
-  using T = typename E::result_type;
-
-  static_assert(!std::is_copy_constructible<E>::value,
-                "NonsecureURBGBase should not be copy constructible");
-
-  static_assert(!absl::is_copy_assignable<E>::value,
-                "NonsecureURBGBase should not be copy assignable");
-
-  static_assert(std::is_move_constructible<E>::value,
-                "NonsecureURBGBase should be move constructible");
-
-  static_assert(absl::is_move_assignable<E>::value,
-                "NonsecureURBGBase should be move assignable");
-
-  static_assert(std::is_same<decltype(std::declval<E>()()), T>::value,
-                "return type of operator() must be result_type");
-
-  {
-    const E x, y;
-    Use(x);
-    Use(y);
-
-    static_assert(std::is_same<decltype(x == y), bool>::value,
-                  "return type of operator== must be bool");
-
-    static_assert(std::is_same<decltype(x != y), bool>::value,
-                  "return type of operator== must be bool");
-  }
-
-  E e;
-  std::seed_seq q{1, 2, 3};
-
-  E{};
-  E{q};
-
-  // Copy constructor not supported.
-  // E{x};
-
-  // result_type seed constructor not supported.
-  // E{T{1}};
-
-  // Move constructors are supported.
-  {
-    E tmp(q);
-    E m = std::move(tmp);
-    E n(std::move(m));
-    EXPECT_TRUE(e != n);
-  }
-
-  // Comparisons work.
-  {
-    // MSVC emits error 2718 when using EXPECT_EQ(e, x)
-    //  * actual parameter with __declspec(align('#')) won't be aligned
-    E a(q);
-    E b(q);
-
-    EXPECT_TRUE(a != e);
-    EXPECT_TRUE(a == b);
-
-    a();
-    EXPECT_TRUE(a != b);
-  }
-
-  // e.seed(s) not supported.
-
-  // [rand.req.eng] specifies the parameter as 'unsigned long long'
-  // e.discard(unsigned long long) is supported.
-  unsigned long long z = 1;  // NOLINT(runtime/int)
-  e.discard(z);
-}
-
-TEST(NonsecureURBGBase, SeedSeqConstructorIsValid) {
-  std::seed_seq seq;
-  ExampleNonsecureURBG rbg(seq);
-}
-
-TEST(NonsecureURBGBase, CompatibleWithDistributionUtils) {
-  ExampleNonsecureURBG rbg;
-
-  absl::Uniform(rbg, 0, 100);
-  absl::Uniform(rbg, 0.5, 0.7);
-  absl::Poisson<uint32_t>(rbg);
-  absl::Exponential<float>(rbg);
-}
-
-TEST(NonsecureURBGBase, CompatibleWithStdDistributions) {
-  ExampleNonsecureURBG rbg;
-
-  // Cast to void to suppress [[nodiscard]] warnings
-  static_cast<void>(std::uniform_int_distribution<uint32_t>(0, 100)(rbg));
-  static_cast<void>(std::uniform_real_distribution<float>()(rbg));
-  static_cast<void>(std::bernoulli_distribution(0.2)(rbg));
-}
-
-TEST(NonsecureURBGBase, ConsecutiveDefaultInstancesYieldUniqueVariates) {
-  const size_t kNumSamples = 128;
-
-  ExampleNonsecureURBG rbg1;
-  ExampleNonsecureURBG rbg2;
-
-  for (size_t i = 0; i < kNumSamples; i++) {
-    EXPECT_NE(rbg1(), rbg2());
-  }
-}
-
-TEST(NonsecureURBGBase, EqualSeedSequencesYieldEqualVariates) {
-  std::seed_seq seq;
-
-  ExampleNonsecureURBG rbg1(seq);
-  ExampleNonsecureURBG rbg2(seq);
-
-  // ExampleNonsecureURBG rbg3({1, 2, 3});  // Should not compile.
-
-  for (uint32_t i = 0; i < 1000; i++) {
-    EXPECT_EQ(rbg1(), rbg2());
-  }
-
-  rbg1.discard(100);
-  rbg2.discard(100);
-
-  // The sequences should continue after discarding
-  for (uint32_t i = 0; i < 1000; i++) {
-    EXPECT_EQ(rbg1(), rbg2());
-  }
-}
-
-// This is a PRNG-compatible type specifically designed to test
-// that NonsecureURBGBase::Seeder can correctly handle iterators
-// to arbitrary non-uint32_t size types.
-template <typename T>
-struct SeederTestEngine {
-  using result_type = T;
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  template <class SeedSequence,
-            typename = typename absl::enable_if_t<
-                !std::is_same<SeedSequence, SeederTestEngine>::value>>
-  explicit SeederTestEngine(SeedSequence&& seq) {
-    seed(seq);
-  }
-
-  SeederTestEngine(const SeederTestEngine&) = default;
-  SeederTestEngine& operator=(const SeederTestEngine&) = default;
-  SeederTestEngine(SeederTestEngine&&) = default;
-  SeederTestEngine& operator=(SeederTestEngine&&) = default;
-
-  result_type operator()() { return state[0]; }
-
-  template <class SeedSequence>
-  void seed(SeedSequence&& seq) {
-    std::fill(std::begin(state), std::end(state), T(0));
-    seq.generate(std::begin(state), std::end(state));
-  }
-
-  T state[2];
-};
-
-TEST(NonsecureURBGBase, SeederWorksForU32) {
-  using U32 =
-      absl::random_internal::NonsecureURBGBase<SeederTestEngine<uint32_t>>;
-  U32 x;
-  EXPECT_NE(0, x());
-}
-
-TEST(NonsecureURBGBase, SeederWorksForU64) {
-  using U64 =
-      absl::random_internal::NonsecureURBGBase<SeederTestEngine<uint64_t>>;
-
-  U64 x;
-  EXPECT_NE(0, x());
-}
diff --git a/third_party/abseil/absl/random/internal/pcg_engine.h b/third_party/abseil/absl/random/internal/pcg_engine.h
deleted file mode 100644
index 8efaf2e..0000000
--- a/third_party/abseil/absl/random/internal/pcg_engine.h
+++ /dev/null
@@ -1,308 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_PCG_ENGINE_H_
-#define ABSL_RANDOM_INTERNAL_PCG_ENGINE_H_
-
-#include <type_traits>
-
-#include "absl/base/config.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/bits.h"
-#include "absl/numeric/int128.h"
-#include "absl/random/internal/fastmath.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// pcg_engine is a simplified implementation of Melissa O'Neil's PCG engine in
-// C++.  PCG combines a linear congruential generator (LCG) with output state
-// mixing functions to generate each random variate.  pcg_engine supports only a
-// single sequence (oneseq), and does not support streams.
-//
-// pcg_engine is parameterized by two types:
-//   Params, which provides the multiplier and increment values;
-//   Mix, which mixes the state into the result.
-//
-template <typename Params, typename Mix>
-class pcg_engine {
-  static_assert(std::is_same<typename Params::state_type,
-                             typename Mix::state_type>::value,
-                "Class-template absl::pcg_engine must be parameterized by "
-                "Params and Mix with identical state_type");
-
-  static_assert(std::is_unsigned<typename Mix::result_type>::value,
-                "Class-template absl::pcg_engine must be parameterized by "
-                "an unsigned Mix::result_type");
-
-  using params_type = Params;
-  using mix_type = Mix;
-  using state_type = typename Mix::state_type;
-
- public:
-  // C++11 URBG interface:
-  using result_type = typename Mix::result_type;
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  explicit pcg_engine(uint64_t seed_value = 0) { seed(seed_value); }
-
-  template <class SeedSequence,
-            typename = typename absl::enable_if_t<
-                !std::is_same<SeedSequence, pcg_engine>::value>>
-  explicit pcg_engine(SeedSequence&& seq) {
-    seed(seq);
-  }
-
-  pcg_engine(const pcg_engine&) = default;
-  pcg_engine& operator=(const pcg_engine&) = default;
-  pcg_engine(pcg_engine&&) = default;
-  pcg_engine& operator=(pcg_engine&&) = default;
-
-  result_type operator()() {
-    // Advance the LCG state, always using the new value to generate the output.
-    state_ = lcg(state_);
-    return Mix{}(state_);
-  }
-
-  void seed(uint64_t seed_value = 0) {
-    state_type tmp = seed_value;
-    state_ = lcg(tmp + Params::increment());
-  }
-
-  template <class SeedSequence>
-  typename absl::enable_if_t<
-      !std::is_convertible<SeedSequence, uint64_t>::value, void>
-  seed(SeedSequence&& seq) {
-    reseed(seq);
-  }
-
-  void discard(uint64_t count) { state_ = advance(state_, count); }
-
-  bool operator==(const pcg_engine& other) const {
-    return state_ == other.state_;
-  }
-
-  bool operator!=(const pcg_engine& other) const { return !(*this == other); }
-
-  template <class CharT, class Traits>
-  friend typename absl::enable_if_t<(sizeof(state_type) == 16),
-                                    std::basic_ostream<CharT, Traits>&>
-  operator<<(
-      std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-      const pcg_engine& engine) {
-    auto saver = random_internal::make_ostream_state_saver(os);
-    random_internal::stream_u128_helper<state_type> helper;
-    helper.write(pcg_engine::params_type::multiplier(), os);
-    os << os.fill();
-    helper.write(pcg_engine::params_type::increment(), os);
-    os << os.fill();
-    helper.write(engine.state_, os);
-    return os;
-  }
-
-  template <class CharT, class Traits>
-  friend typename absl::enable_if_t<(sizeof(state_type) <= 8),
-                                    std::basic_ostream<CharT, Traits>&>
-  operator<<(
-      std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-      const pcg_engine& engine) {
-    auto saver = random_internal::make_ostream_state_saver(os);
-    os << pcg_engine::params_type::multiplier() << os.fill();
-    os << pcg_engine::params_type::increment() << os.fill();
-    os << engine.state_;
-    return os;
-  }
-
-  template <class CharT, class Traits>
-  friend typename absl::enable_if_t<(sizeof(state_type) == 16),
-                                    std::basic_istream<CharT, Traits>&>
-  operator>>(
-      std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-      pcg_engine& engine) {                   // NOLINT(runtime/references)
-    random_internal::stream_u128_helper<state_type> helper;
-    auto mult = helper.read(is);
-    auto inc = helper.read(is);
-    auto tmp = helper.read(is);
-    if (mult != pcg_engine::params_type::multiplier() ||
-        inc != pcg_engine::params_type::increment()) {
-      // signal failure by setting the failbit.
-      is.setstate(is.rdstate() | std::ios_base::failbit);
-    }
-    if (!is.fail()) {
-      engine.state_ = tmp;
-    }
-    return is;
-  }
-
-  template <class CharT, class Traits>
-  friend typename absl::enable_if_t<(sizeof(state_type) <= 8),
-                                    std::basic_istream<CharT, Traits>&>
-  operator>>(
-      std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-      pcg_engine& engine) {                   // NOLINT(runtime/references)
-    state_type mult{}, inc{}, tmp{};
-    is >> mult >> inc >> tmp;
-    if (mult != pcg_engine::params_type::multiplier() ||
-        inc != pcg_engine::params_type::increment()) {
-      // signal failure by setting the failbit.
-      is.setstate(is.rdstate() | std::ios_base::failbit);
-    }
-    if (!is.fail()) {
-      engine.state_ = tmp;
-    }
-    return is;
-  }
-
- private:
-  state_type state_;
-
-  // Returns the linear-congruential generator next state.
-  static inline constexpr state_type lcg(state_type s) {
-    return s * Params::multiplier() + Params::increment();
-  }
-
-  // Returns the linear-congruential arbitrary seek state.
-  inline state_type advance(state_type s, uint64_t n) const {
-    state_type mult = Params::multiplier();
-    state_type inc = Params::increment();
-    state_type m = 1;
-    state_type i = 0;
-    while (n > 0) {
-      if (n & 1) {
-        m *= mult;
-        i = i * mult + inc;
-      }
-      inc = (mult + 1) * inc;
-      mult *= mult;
-      n >>= 1;
-    }
-    return m * s + i;
-  }
-
-  template <class SeedSequence>
-  void reseed(SeedSequence& seq) {
-    using sequence_result_type = typename SeedSequence::result_type;
-    constexpr size_t kBufferSize =
-        sizeof(state_type) / sizeof(sequence_result_type);
-    sequence_result_type buffer[kBufferSize];
-    seq.generate(std::begin(buffer), std::end(buffer));
-    // Convert the seed output to a single state value.
-    state_type tmp = buffer[0];
-    for (size_t i = 1; i < kBufferSize; i++) {
-      tmp <<= (sizeof(sequence_result_type) * 8);
-      tmp |= buffer[i];
-    }
-    state_ = lcg(tmp + params_type::increment());
-  }
-};
-
-// Parameterized implementation of the PCG 128-bit oneseq state.
-// This provides state_type, multiplier, and increment for pcg_engine.
-template <uint64_t kMultA, uint64_t kMultB, uint64_t kIncA, uint64_t kIncB>
-class pcg128_params {
- public:
-#if ABSL_HAVE_INTRINSIC_INT128
-  using state_type = __uint128_t;
-  static inline constexpr state_type make_u128(uint64_t a, uint64_t b) {
-    return (static_cast<__uint128_t>(a) << 64) | b;
-  }
-#else
-  using state_type = absl::uint128;
-  static inline constexpr state_type make_u128(uint64_t a, uint64_t b) {
-    return absl::MakeUint128(a, b);
-  }
-#endif
-
-  static inline constexpr state_type multiplier() {
-    return make_u128(kMultA, kMultB);
-  }
-  static inline constexpr state_type increment() {
-    return make_u128(kIncA, kIncB);
-  }
-};
-
-// Implementation of the PCG xsl_rr_128_64 128-bit mixing function, which
-// accepts an input of state_type and mixes it into an output of result_type.
-struct pcg_xsl_rr_128_64 {
-#if ABSL_HAVE_INTRINSIC_INT128
-  using state_type = __uint128_t;
-#else
-  using state_type = absl::uint128;
-#endif
-  using result_type = uint64_t;
-
-  inline uint64_t operator()(state_type state) {
-    // This is equivalent to the xsl_rr_128_64 mixing function.
-#if ABSL_HAVE_INTRINSIC_INT128
-    uint64_t rotate = static_cast<uint64_t>(state >> 122u);
-    state ^= state >> 64;
-    uint64_t s = static_cast<uint64_t>(state);
-#else
-    uint64_t h = Uint128High64(state);
-    uint64_t rotate = h >> 58u;
-    uint64_t s = Uint128Low64(state) ^ h;
-#endif
-    return rotr(s, rotate);
-  }
-};
-
-// Parameterized implementation of the PCG 64-bit oneseq state.
-// This provides state_type, multiplier, and increment for pcg_engine.
-template <uint64_t kMult, uint64_t kInc>
-class pcg64_params {
- public:
-  using state_type = uint64_t;
-  static inline constexpr state_type multiplier() { return kMult; }
-  static inline constexpr state_type increment() { return kInc; }
-};
-
-// Implementation of the PCG xsh_rr_64_32 64-bit mixing function, which accepts
-// an input of state_type and mixes it into an output of result_type.
-struct pcg_xsh_rr_64_32 {
-  using state_type = uint64_t;
-  using result_type = uint32_t;
-  inline uint32_t operator()(uint64_t state) {
-    return rotr(static_cast<uint32_t>(((state >> 18) ^ state) >> 27),
-                state >> 59);
-  }
-};
-
-// Stable pcg_engine implementations:
-// This is a 64-bit generator using 128-bits of state.
-// The output sequence is equivalent to Melissa O'Neil's pcg64_oneseq.
-using pcg64_2018_engine = pcg_engine<
-    random_internal::pcg128_params<0x2360ed051fc65da4ull, 0x4385df649fccf645ull,
-                                   0x5851f42d4c957f2d, 0x14057b7ef767814f>,
-    random_internal::pcg_xsl_rr_128_64>;
-
-// This is a 32-bit generator using 64-bits of state.
-// This is equivalent to Melissa O'Neil's pcg32_oneseq.
-using pcg32_2018_engine = pcg_engine<
-    random_internal::pcg64_params<0x5851f42d4c957f2dull, 0x14057b7ef767814full>,
-    random_internal::pcg_xsh_rr_64_32>;
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_PCG_ENGINE_H_
diff --git a/third_party/abseil/absl/random/internal/pcg_engine_test.cc b/third_party/abseil/absl/random/internal/pcg_engine_test.cc
deleted file mode 100644
index 4d763e8..0000000
--- a/third_party/abseil/absl/random/internal/pcg_engine_test.cc
+++ /dev/null
@@ -1,638 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/pcg_engine.h"
-
-#include <algorithm>
-#include <bitset>
-#include <random>
-#include <sstream>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/random/internal/explicit_seed_seq.h"
-#include "absl/time/clock.h"
-
-#define UPDATE_GOLDEN 0
-
-namespace {
-
-using absl::random_internal::ExplicitSeedSeq;
-using absl::random_internal::pcg32_2018_engine;
-using absl::random_internal::pcg64_2018_engine;
-
-template <typename EngineType>
-class PCGEngineTest : public ::testing::Test {};
-
-using EngineTypes = ::testing::Types<pcg64_2018_engine, pcg32_2018_engine>;
-
-TYPED_TEST_SUITE(PCGEngineTest, EngineTypes);
-
-TYPED_TEST(PCGEngineTest, VerifyReseedChangesAllValues) {
-  using engine_type = TypeParam;
-  using result_type = typename engine_type::result_type;
-
-  const size_t kNumOutputs = 16;
-  engine_type engine;
-
-  // MSVC emits error 2719 without the use of std::ref below.
-  //  * formal parameter with __declspec(align('#')) won't be aligned
-
-  {
-    std::seed_seq seq1{1, 2, 3, 4, 5, 6, 7};
-    engine.seed(seq1);
-  }
-  result_type a[kNumOutputs];
-  std::generate(std::begin(a), std::end(a), std::ref(engine));
-
-  {
-    std::random_device rd;
-    std::seed_seq seq2{rd(), rd(), rd()};
-    engine.seed(seq2);
-  }
-  result_type b[kNumOutputs];
-  std::generate(std::begin(b), std::end(b), std::ref(engine));
-
-  // Verify that two uncorrelated values have ~50% of there bits in common. Use
-  // a 10% margin-of-error to reduce flakiness.
-  size_t changed_bits = 0;
-  size_t unchanged_bits = 0;
-  size_t total_set = 0;
-  size_t total_bits = 0;
-  size_t equal_count = 0;
-  for (size_t i = 0; i < kNumOutputs; ++i) {
-    equal_count += (a[i] == b[i]) ? 1 : 0;
-    std::bitset<sizeof(result_type) * 8> bitset(a[i] ^ b[i]);
-    changed_bits += bitset.count();
-    unchanged_bits += bitset.size() - bitset.count();
-
-    std::bitset<sizeof(result_type) * 8> a_set(a[i]);
-    std::bitset<sizeof(result_type) * 8> b_set(b[i]);
-    total_set += a_set.count() + b_set.count();
-    total_bits += 2 * 8 * sizeof(result_type);
-  }
-  // On average, half the bits are changed between two calls.
-  EXPECT_LE(changed_bits, 0.60 * (changed_bits + unchanged_bits));
-  EXPECT_GE(changed_bits, 0.40 * (changed_bits + unchanged_bits));
-
-  // verify using a quick normal-approximation to the binomial.
-  EXPECT_NEAR(total_set, total_bits * 0.5, 4 * std::sqrt(total_bits))
-      << "@" << total_set / static_cast<double>(total_bits);
-
-  // Also, A[i] == B[i] with probability (1/range) * N.
-  // Give this a pretty wide latitude, though.
-  const double kExpected = kNumOutputs / (1.0 * sizeof(result_type) * 8);
-  EXPECT_LE(equal_count, 1.0 + kExpected);
-}
-
-// Number of values that needs to be consumed to clean two sizes of buffer
-// and trigger third refresh. (slightly overestimates the actual state size).
-constexpr size_t kTwoBufferValues = 16;
-
-TYPED_TEST(PCGEngineTest, VerifyDiscard) {
-  using engine_type = TypeParam;
-
-  for (size_t num_used = 0; num_used < kTwoBufferValues; ++num_used) {
-    engine_type engine_used;
-    for (size_t i = 0; i < num_used; ++i) {
-      engine_used();
-    }
-
-    for (size_t num_discard = 0; num_discard < kTwoBufferValues;
-         ++num_discard) {
-      engine_type engine1 = engine_used;
-      engine_type engine2 = engine_used;
-      for (size_t i = 0; i < num_discard; ++i) {
-        engine1();
-      }
-      engine2.discard(num_discard);
-      for (size_t i = 0; i < kTwoBufferValues; ++i) {
-        const auto r1 = engine1();
-        const auto r2 = engine2();
-        ASSERT_EQ(r1, r2) << "used=" << num_used << " discard=" << num_discard;
-      }
-    }
-  }
-}
-
-TYPED_TEST(PCGEngineTest, StreamOperatorsResult) {
-  using engine_type = TypeParam;
-
-  std::wostringstream os;
-  std::wistringstream is;
-  engine_type engine;
-
-  EXPECT_EQ(&(os << engine), &os);
-  EXPECT_EQ(&(is >> engine), &is);
-}
-
-TYPED_TEST(PCGEngineTest, StreamSerialization) {
-  using engine_type = TypeParam;
-
-  for (size_t discard = 0; discard < kTwoBufferValues; ++discard) {
-    ExplicitSeedSeq seed_sequence{12, 34, 56};
-    engine_type engine(seed_sequence);
-    engine.discard(discard);
-
-    std::stringstream stream;
-    stream << engine;
-
-    engine_type new_engine;
-    stream >> new_engine;
-    for (size_t i = 0; i < 64; ++i) {
-      EXPECT_EQ(engine(), new_engine()) << " " << i;
-    }
-  }
-}
-
-constexpr size_t kNumGoldenOutputs = 127;
-
-// This test is checking if randen_engine is meets interface requirements
-// defined in [rand.req.urbg].
-TYPED_TEST(PCGEngineTest, RandomNumberEngineInterface) {
-  using engine_type = TypeParam;
-
-  using E = engine_type;
-  using T = typename E::result_type;
-
-  static_assert(std::is_copy_constructible<E>::value,
-                "engine_type must be copy constructible");
-
-  static_assert(absl::is_copy_assignable<E>::value,
-                "engine_type must be copy assignable");
-
-  static_assert(std::is_move_constructible<E>::value,
-                "engine_type must be move constructible");
-
-  static_assert(absl::is_move_assignable<E>::value,
-                "engine_type must be move assignable");
-
-  static_assert(std::is_same<decltype(std::declval<E>()()), T>::value,
-                "return type of operator() must be result_type");
-
-  // Names after definition of [rand.req.urbg] in C++ standard.
-  // e us a value of E
-  // v is a lvalue of E
-  // x, y are possibly const values of E
-  // s is a value of T
-  // q is a value satisfying requirements of seed_sequence
-  // z is a value of type unsigned long long
-  // os is a some specialization of basic_ostream
-  // is is a some specialization of basic_istream
-
-  E e, v;
-  const E x, y;
-  T s = 1;
-  std::seed_seq q{1, 2, 3};
-  unsigned long long z = 1;  // NOLINT(runtime/int)
-  std::wostringstream os;
-  std::wistringstream is;
-
-  E{};
-  E{x};
-  E{s};
-  E{q};
-
-  e.seed();
-
-  // MSVC emits error 2718 when using EXPECT_EQ(e, x)
-  //  * actual parameter with __declspec(align('#')) won't be aligned
-  EXPECT_TRUE(e == x);
-
-  e.seed(q);
-  {
-    E tmp(q);
-    EXPECT_TRUE(e == tmp);
-  }
-
-  e();
-  {
-    E tmp(q);
-    EXPECT_TRUE(e != tmp);
-  }
-
-  e.discard(z);
-
-  static_assert(std::is_same<decltype(x == y), bool>::value,
-                "return type of operator== must be bool");
-
-  static_assert(std::is_same<decltype(x != y), bool>::value,
-                "return type of operator== must be bool");
-}
-
-TYPED_TEST(PCGEngineTest, RandenEngineSFINAETest) {
-  using engine_type = TypeParam;
-  using result_type = typename engine_type::result_type;
-
-  {
-    engine_type engine(result_type(1));
-    engine.seed(result_type(1));
-  }
-
-  {
-    result_type n = 1;
-    engine_type engine(n);
-    engine.seed(n);
-  }
-
-  {
-    engine_type engine(1);
-    engine.seed(1);
-  }
-
-  {
-    int n = 1;
-    engine_type engine(n);
-    engine.seed(n);
-  }
-
-  {
-    std::seed_seq seed_seq;
-    engine_type engine(seed_seq);
-    engine.seed(seed_seq);
-  }
-
-  {
-    engine_type engine{std::seed_seq()};
-    engine.seed(std::seed_seq());
-  }
-}
-
-// ------------------------------------------------------------------
-// Stability tests for pcg64_2018_engine
-// ------------------------------------------------------------------
-TEST(PCG642018EngineTest, VerifyGolden) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0x01070196e695f8f1, 0x703ec840c59f4493, 0xe54954914b3a44fa,
-      0x96130ff204b9285e, 0x7d9fdef535ceb21a, 0x666feed42e1219a0,
-      0x981f685721c8326f, 0xad80710d6eab4dda, 0xe202c480b037a029,
-      0x5d3390eaedd907e2, 0x0756befb39c6b8aa, 0x1fb44ba6634d62a3,
-      0x8d20423662426642, 0x34ea910167a39fb4, 0x93010b43a80d0ab6,
-      0x663db08a98fc568a, 0x720b0a1335956fae, 0x2c35483e31e1d3ba,
-      0x429f39776337409d, 0xb46d99e638687344, 0x105370b96aedcaee,
-      0x3999e92f811cff71, 0xd230f8bcb591cfc9, 0x0dce3db2ba7bdea5,
-      0xcf2f52c91eec99af, 0x2bc7c24a8b998a39, 0xbd8af1b0d599a19c,
-      0x56bc45abc66059f5, 0x170a46dc170f7f1e, 0xc25daf5277b85fad,
-      0xe629c2e0c948eadb, 0x1720a796915542ed, 0x22fb0caa4f909951,
-      0x7e0c0f4175acd83d, 0xd9fcab37ff2a860c, 0xab2280fb2054bad1,
-      0x58e8a06f37fa9e99, 0xc3a52a30b06528c7, 0x0175f773a13fc1bd,
-      0x731cfc584b00e840, 0x404cc7b2648069cb, 0x5bc29153b0b7f783,
-      0x771310a38cc999d1, 0x766a572f0a71a916, 0x90f450fb4fc48348,
-      0xf080ea3e1c7b1a0d, 0x15471a4507d66a44, 0x7d58e55a78f3df69,
-      0x0130a094576ac99c, 0x46669cb2d04b1d87, 0x17ab5bed20191840,
-      0x95b177d260adff3e, 0x025fb624b6ee4c07, 0xb35de4330154a95f,
-      0xe8510fff67e24c79, 0x132c3cbcd76ed2d3, 0x35e7cc145a093904,
-      0x9f5b5b5f81583b79, 0x3ee749a533966233, 0x4af85886cdeda8cd,
-      0x0ca5380ecb3ef3aa, 0x4f674eb7661d3192, 0x88a29aad00cd7733,
-      0x70b627ca045ffac6, 0x5912b43ea887623d, 0x95dc9fc6f62cf221,
-      0x926081a12a5c905b, 0x9c57d4cd7dfce651, 0x85ab2cbf23e3bb5d,
-      0xc5cd669f63023152, 0x3067be0fad5d898e, 0x12b56f444cb53d05,
-      0xbc2e5a640c3434fc, 0x9280bff0e4613fe1, 0x98819094c528743e,
-      0x999d1c98d829df33, 0x9ff82a012dc89242, 0xf99183ed39c8be94,
-      0xf0f59161cd421c55, 0x3c705730c2f6c48d, 0x66ad85c6e9278a61,
-      0x2a3428e4a428d5d0, 0x79207d68fd04940d, 0xea7f2b402edc8430,
-      0xa06b419ac857f63b, 0xcb1dd0e6fbc47e1c, 0x4f55229200ada6a4,
-      0x9647b5e6359c927f, 0x30bf8f9197c7efe5, 0xa79519529cc384d0,
-      0xbb22c4f339ad6497, 0xd7b9782f59d14175, 0x0dff12fff2ec0118,
-      0xa331ad8305343a7c, 0x48dad7e3f17e0862, 0x324c6fb3fd3c9665,
-      0xf0e4350e7933dfc4, 0x7ccda2f30b8b03b6, 0xa0afc6179005de40,
-      0xee65da6d063b3a30, 0xb9506f42f2bfe87a, 0xc9a2e26b0ef5baa0,
-      0x39fa9d4f495011d6, 0xbecc21a45d023948, 0x6bf484c6593f737f,
-      0x8065e0070cadc3b7, 0x9ef617ed8d419799, 0xac692cf8c233dd15,
-      0xd2ed87583c4ebb98, 0xad95ba1bebfedc62, 0x9b60b160a8264e43,
-      0x0bc8c45f71fcf25b, 0x4a78035cdf1c9931, 0x4602dc106667e029,
-      0xb335a3c250498ac8, 0x0256ebc4df20cab8, 0x0c61efd153f0c8d9,
-      0xe5d0150a4f806f88, 0x99d6521d351e7d87, 0x8d4888c9f80f4325,
-      0x106c5735c1ba868d, 0x73414881b880a878, 0x808a9a58a3064751,
-      0x339a29f3746de3d5, 0x5410d7fa4f873896, 0xd84623c81d7b8a03,
-      0x1f7c7e7a7f47f462,
-  };
-
-  pcg64_2018_engine engine(0);
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%016lx, ", engine());
-    if (i % 3 == 2) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed();
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(PCG642018EngineTest, VerifyGoldenSeeded) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0xb03988f1e39691ee, 0xbd2a1eb5ac31e97a, 0x8f00d6d433634d02,
-      0x1823c28d483d5776, 0x000c3ee3e1aeb74a, 0xfa82ef27a4f3df9c,
-      0xc6f382308654e454, 0x414afb1a238996c2, 0x4703a4bc252eb411,
-      0x99d64f62c8f7f654, 0xbb07ebe11a34fa44, 0x79eb06a363c06131,
-      0xf66ad3756f1c6b21, 0x130c01d5e869f457, 0x5ca2b9963aecbc81,
-      0xfef7bebc1de27e6c, 0x1d174faa5ed2cdbf, 0xd75b7a773f2bb889,
-      0xc35c872327a170a5, 0x46da6d88646a42fe, 0x4622985e0442dae2,
-      0xbe3cbd67297f1f9b, 0xe7c37b4a4798bfd1, 0x173d5dfad15a25c3,
-      0x0eb6849ba2961522, 0xb0ff7246e6700d73, 0x88cb9c42d3afa577,
-      0xb609731dbd94d917, 0xd3941cda04b40081, 0x28d140f7409bea3a,
-      0x3c96699a920a124a, 0xdb28be521958b2fd, 0x0a3f44db3d4c5124,
-      0x7ac8e60ba13b70d2, 0x75f03a41ded5195a, 0xaed10ac7c4e4825d,
-      0xb92a3b18aadb7adc, 0xda45e0081f2bca46, 0x74d39ab3753143fc,
-      0xb686038018fac9ca, 0x4cc309fe99542dbb, 0xf3e1a4fcb311097c,
-      0x58763d6fa698d69d, 0xd11c365dbecd8d60, 0x2c15d55725b1dee7,
-      0x89805f254d85658c, 0x2374c44dfc62158b, 0x9a8350fa7995328d,
-      0x198f838970cf91da, 0x96aff569562c0e53, 0xd76c8c52b7ec6e3f,
-      0x23a01cd9ae4baa81, 0x3adb366b6d02a893, 0xb3313e2a4c5b333f,
-      0x04c11230b96a5425, 0x1f7f7af04787d571, 0xaddb019365275ec7,
-      0x5c960468ccb09f42, 0x8438db698c69a44a, 0x492be1e46111637e,
-      0x9c6c01e18100c610, 0xbfe48e75b7d0aceb, 0xb5e0b89ec1ce6a00,
-      0x9d280ecbc2fe8997, 0x290d9e991ba5fcab, 0xeec5bec7d9d2a4f0,
-      0x726e81488f19150e, 0x1a6df7955a7e462c, 0x37a12d174ba46bb5,
-      0x3cdcdffd96b1b5c5, 0x2c5d5ac10661a26e, 0xa742ed18f22e50c4,
-      0x00e0ed88ff0d8a35, 0x3d3c1718cb1efc0b, 0x1d70c51ffbccbf11,
-      0xfbbb895132a4092f, 0x619d27f2fb095f24, 0x69af68200985e5c4,
-      0xbee4885f57373f8d, 0x10b7a6bfe0587e40, 0xa885e6cf2f7e5f0a,
-      0x59f879464f767550, 0x24e805d69056990d, 0x860970b911095891,
-      0xca3189954f84170d, 0x6652a5edd4590134, 0x5e1008cef76174bf,
-      0xcbd417881f2bcfe5, 0xfd49fc9d706ecd17, 0xeebf540221ebd066,
-      0x46af7679464504cb, 0xd4028486946956f1, 0xd4f41864b86c2103,
-      0x7af090e751583372, 0x98cdaa09278cb642, 0xffd42b921215602f,
-      0x1d05bec8466b1740, 0xf036fa78a0132044, 0x787880589d1ecc78,
-      0x5644552cfef33230, 0x0a97e275fe06884b, 0x96d1b13333d470b5,
-      0xc8b3cdad52d3b034, 0x091357b9db7376fd, 0xa5fe4232555edf8c,
-      0x3371bc3b6ada76b5, 0x7deeb2300477c995, 0x6fc6d4244f2849c1,
-      0x750e8cc797ca340a, 0x81728613cd79899f, 0x3467f4ee6f9aeb93,
-      0x5ef0a905f58c640f, 0x432db85e5101c98a, 0x6488e96f46ac80c2,
-      0x22fddb282625048c, 0x15b287a0bc2d4c5d, 0xa7e2343ef1f28bce,
-      0xc87ee1aa89bed09e, 0x220610107812c5e9, 0xcbdab6fcd640f586,
-      0x8d41047970928784, 0x1aa431509ec1ade0, 0xac3f0be53f518ddc,
-      0x16f4428ad81d0cbb, 0x675b13c2736fc4bb, 0x6db073afdd87e32d,
-      0x572f3ca2f1a078c6,
-  };
-
-  ExplicitSeedSeq seed_sequence{12, 34, 56};
-  pcg64_2018_engine engine(seed_sequence);
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%016lx, ", engine());
-    if (i % 3 == 2) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed(seed_sequence);
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(PCG642018EngineTest, VerifyGoldenFromDeserializedEngine) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0xdd425b47b4113dea, 0x1b07176479d444b0, 0x6b391027586f2e42,
-      0xa166f2b15f4a2143, 0xffb6dbd7a179ee97, 0xb2c00035365bf0b1,
-      0x8fbb518b45855521, 0xfc789a55ddf87c3b, 0x429531f0f17ff355,
-      0xbe708560d603d283, 0x5bff415175c5cb6b, 0xe813491f4ad45394,
-      0xa853f4506d55880d, 0x7e538453e568172e, 0xe101f1e098ddd0ec,
-      0x6ee31266ee4c766d, 0xa8786d92d66b39d7, 0xfee622a2acf5e5b0,
-      0x5fe8e82c102fa7b3, 0x01f10be4cdb53c9d, 0xbe0545366f857022,
-      0x12e74f010a339bca, 0xb10d85ca40d5ce34, 0xe80d6feba5054875,
-      0x2b7c1ee6d567d4ee, 0x2a9cd043bfd03b66, 0x5cfc531bd239f3f1,
-      0x1c4734e4647d70f5, 0x85a8f60f006b5760, 0x6a4239ce76dca387,
-      0x8da0f86d7339335c, 0xf055b0468551374d, 0x486e8567e9bea9a0,
-      0x4cb531b8405192dd, 0xf813b1ee3157110b, 0x214c2a664a875d8e,
-      0x74531237b29b35f7, 0xa6f0267bb77a771e, 0x64b552bff54184a4,
-      0xa2d6f7af2d75b6fc, 0x460a10018e03b5ab, 0x76fd1fdcb81d0800,
-      0x76f5f81805070d9d, 0x1fb75cb1a70b289a, 0x9dfd25a022c4b27f,
-      0x9a31a14a80528e9e, 0x910dc565ddc25820, 0xd6aef8e2b0936c10,
-      0xe1773c507fe70225, 0xe027fd7aadd632bc, 0xc1fecb427089c8b8,
-      0xb5c74c69fa9dbf26, 0x71bf9b0e4670227d, 0x25f48fad205dcfdd,
-      0x905248ec4d689c56, 0x5c2b7631b0de5c9d, 0x9f2ee0f8f485036c,
-      0xfd6ce4ebb90bf7ea, 0xd435d20046085574, 0x6b7eadcb0625f986,
-      0x679d7d44b48be89e, 0x49683b8e1cdc49de, 0x4366cf76e9a2f4ca,
-      0x54026ec1cdad7bed, 0xa9a04385207f28d3, 0xc8e66de4eba074b2,
-      0x40b08c42de0f4cc0, 0x1d4c5e0e93c5bbc0, 0x19b80792e470ae2d,
-      0x6fcaaeaa4c2a5bd9, 0xa92cb07c4238438e, 0x8bb5c918a007e298,
-      0x7cd671e944874cf4, 0x88166470b1ba3cac, 0xd013d476eaeeade6,
-      0xcee416947189b3c3, 0x5d7c16ab0dce6088, 0xd3578a5c32b13d27,
-      0x3875db5adc9cc973, 0xfbdaba01c5b5dc56, 0xffc4fdd391b231c3,
-      0x2334520ecb164fec, 0x361c115e7b6de1fa, 0xeee58106cc3563d7,
-      0x8b7f35a8db25ebb8, 0xb29d00211e2cafa6, 0x22a39fe4614b646b,
-      0x92ca6de8b998506d, 0x40922fe3d388d1db, 0x9da47f1e540f802a,
-      0x811dceebf16a25db, 0xf6524ae22e0e53a9, 0x52d9e780a16eb99d,
-      0x4f504286bb830207, 0xf6654d4786bd5cc3, 0x00bd98316003a7e1,
-      0xefda054a6ab8f5f3, 0x46cfb0f4c1872827, 0xc22b316965c0f3b2,
-      0xd1a28087c7e7562a, 0xaa4f6a094b7f5cff, 0xfe2bc853a041f7da,
-      0xe9d531402a83c3ba, 0xe545d8663d3ce4dd, 0xfa2dcd7d91a13fa8,
-      0xda1a080e52a127b8, 0x19c98f1f809c3d84, 0x2cef109af4678c88,
-      0x53462accab3b9132, 0x176b13a80415394e, 0xea70047ef6bc178b,
-      0x57bca80506d6dcdf, 0xd853ba09ff09f5c4, 0x75f4df3a7ddd4775,
-      0x209c367ade62f4fe, 0xa9a0bbc74d5f4682, 0x5dfe34bada86c21a,
-      0xc2c05bbcd38566d1, 0x6de8088e348c916a, 0x6a7001c6000c2196,
-      0xd9fb51865fc4a367, 0x12f320e444ece8ff, 0x6d56f7f793d65035,
-      0x138f31b7a865f8aa, 0x58fc68b4026b9adf, 0xcd48954b79fb6436,
-      0x27dfce4a0232af87,
-  };
-
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  std::seed_seq seed_sequence{1, 2, 3};
-  pcg64_2018_engine engine(seed_sequence);
-  std::ostringstream stream;
-  stream << engine;
-  auto str = stream.str();
-  printf("%s\n\n", str.c_str());
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%016lx, ", engine());
-    if (i % 3 == 2) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  pcg64_2018_engine engine;
-  std::istringstream stream(
-      "2549297995355413924 4865540595714422341 6364136223846793005 "
-      "1442695040888963407 18088519957565336995 4845369368158826708");
-  stream >> engine;
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-// ------------------------------------------------------------------
-// Stability tests for pcg32_2018_engine
-// ------------------------------------------------------------------
-TEST(PCG322018EngineTest, VerifyGolden) {
-  constexpr uint32_t kGolden[kNumGoldenOutputs] = {
-      0x7a7ecbd9, 0x89fd6c06, 0xae646aa8, 0xcd3cf945, 0x6204b303, 0x198c8585,
-      0x49fce611, 0xd1e9297a, 0x142d9440, 0xee75f56b, 0x473a9117, 0xe3a45903,
-      0xbce807a1, 0xe54e5f4d, 0x497d6c51, 0x61829166, 0xa740474b, 0x031912a8,
-      0x9de3defa, 0xd266dbf1, 0x0f38bebb, 0xec3c4f65, 0x07c5057d, 0xbbce03c8,
-      0xfd2ac7a8, 0xffcf4773, 0x5b10affb, 0xede1c842, 0xe22b01b7, 0xda133c8c,
-      0xaf89b0f4, 0x25d1b8bc, 0x9f625482, 0x7bfd6882, 0x2e2210c0, 0x2c8fb9a6,
-      0x42cb3b83, 0x40ce0dab, 0x644a3510, 0x36230ef2, 0xe2cb6d43, 0x1012b343,
-      0x746c6c9f, 0x36714cf8, 0xed1f5026, 0x8bbbf83e, 0xe98710f4, 0x8a2afa36,
-      0x09035349, 0x6dc1a487, 0x682b634b, 0xc106794f, 0x7dd78beb, 0x628c262b,
-      0x852fb232, 0xb153ac4c, 0x4f169d1b, 0xa69ab774, 0x4bd4b6f2, 0xdc351dd3,
-      0x93ff3c8c, 0xa30819ab, 0xff07758c, 0x5ab13c62, 0xd16d7fb5, 0xc4950ffa,
-      0xd309ae49, 0xb9677a87, 0x4464e317, 0x90dc44f1, 0xc694c1d4, 0x1d5e1168,
-      0xadf37a2d, 0xda38990d, 0x1ec4bd33, 0x36ca25ce, 0xfa0dc76a, 0x968a9d43,
-      0x6950ac39, 0xdd3276bc, 0x06d5a71e, 0x1f6f282d, 0x5c626c62, 0xdde3fc31,
-      0x152194ce, 0xc35ed14c, 0xb1f7224e, 0x47f76bb8, 0xb34fdd08, 0x7011395e,
-      0x162d2a49, 0x0d1bf09f, 0x9428a952, 0x03c5c344, 0xd3525616, 0x7816fff3,
-      0x6bceb8a8, 0x8345a081, 0x366420fd, 0x182abeda, 0x70f82745, 0xaf15ded8,
-      0xc7f52ca2, 0xa98db9c5, 0x919d99ba, 0x9c376c1c, 0xed8d34c2, 0x716ae9f5,
-      0xef062fa5, 0xee3b6c56, 0x52325658, 0x61afa9c3, 0xfdaf02f0, 0x961cf3ab,
-      0x9f291565, 0x4fbf3045, 0x0590c899, 0xde901385, 0x45005ffb, 0x509db162,
-      0x262fa941, 0x4c421653, 0x4b17c21e, 0xea0d1530, 0xde803845, 0x61bfd515,
-      0x438523ef,
-  };
-
-  pcg32_2018_engine engine(0);
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%08x, ", engine());
-    if (i % 6 == 5) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed();
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(PCG322018EngineTest, VerifyGoldenSeeded) {
-  constexpr uint32_t kGolden[kNumGoldenOutputs] = {
-      0x60b5a64c, 0x978502f9, 0x80a75f60, 0x241f1158, 0xa4cd1dbb, 0xe7284017,
-      0x3b678da5, 0x5223ec99, 0xe4bdd5d9, 0x72190e6d, 0xe6e702c9, 0xff80c768,
-      0xcf126ed3, 0x1fbd20ab, 0x60980489, 0xbc72bf89, 0x407ac6c0, 0x00bf3c51,
-      0xf9087897, 0x172e4eb6, 0xe9e4f443, 0x1a6098bf, 0xbf44f8c2, 0xdd84a0e5,
-      0xd9a52364, 0xc0e2e786, 0x061ae2ba, 0x9facb8e3, 0x6109432d, 0xd4e0a013,
-      0xbd8eb9a6, 0x7e86c3b6, 0x629c0e68, 0x05337430, 0xb495b9f4, 0x11ccd65d,
-      0xb578db25, 0x66f1246d, 0x6ef20a7f, 0x5e429812, 0x11772130, 0xb944b5c2,
-      0x01624128, 0xa2385ab7, 0xd3e10d35, 0xbe570ec3, 0xc951656f, 0xbe8944a0,
-      0x7be41062, 0x5709f919, 0xd745feda, 0x9870b9ae, 0xb44b8168, 0x19e7683b,
-      0xded8017f, 0xc6e4d544, 0x91ae4225, 0xd6745fba, 0xb992f284, 0x65b12b33,
-      0xa9d5fdb4, 0xf105ce1a, 0x35ca1a6e, 0x2ff70dd0, 0xd8335e49, 0xfb71ddf2,
-      0xcaeabb89, 0x5c6f5f84, 0x9a811a7d, 0xbcecbbd1, 0x0f661ba0, 0x9ad93b9d,
-      0xedd23e0b, 0x42062f48, 0xd38dd7e4, 0x6cd63c9c, 0x640b98ae, 0x4bff5653,
-      0x12626371, 0x13266017, 0xe7a698d8, 0x39c74667, 0xe8fdf2e3, 0x52803bf8,
-      0x2af6895b, 0x91335b7b, 0x699e4961, 0x00a40fff, 0x253ff2b6, 0x4a6cf672,
-      0x9584e85f, 0xf2a5000c, 0x4d58aba8, 0xb8513e6a, 0x767fad65, 0x8e326f9e,
-      0x182f15a1, 0x163dab52, 0xdf99c780, 0x047282a1, 0xee4f90dd, 0xd50394ae,
-      0x6c9fd5f0, 0xb06a9194, 0x387e3840, 0x04a9487b, 0xf678a4c2, 0xd0a78810,
-      0xd502c97e, 0xd6a9b12a, 0x4accc5dc, 0x416ed53e, 0x50411536, 0xeeb89c24,
-      0x813a7902, 0x034ebca6, 0xffa52e7c, 0x7ecd3d0e, 0xfa37a0d2, 0xb1fbe2c1,
-      0xb7efc6d1, 0xefa4ccee, 0xf6f80424, 0x2283f3d9, 0x68732284, 0x94f3b5c8,
-      0xbbdeceb9,
-  };
-
-  ExplicitSeedSeq seed_sequence{12, 34, 56};
-  pcg32_2018_engine engine(seed_sequence);
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%08x, ", engine());
-    if (i % 6 == 5) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed(seed_sequence);
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(PCG322018EngineTest, VerifyGoldenFromDeserializedEngine) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0x780f7042, 0xba137215, 0x43ab6f22, 0x0cb55f46, 0x44b2627d, 0x835597af,
-      0xea973ea1, 0x0d2abd35, 0x4fdd601c, 0xac4342fe, 0x7db7e93c, 0xe56ebcaf,
-      0x3596470a, 0x7770a9ad, 0x9b893320, 0x57db3415, 0xb432de54, 0xa02baf71,
-      0xa256aadb, 0x88921fc7, 0xa35fa6b3, 0xde3eca46, 0x605739a7, 0xa890b82b,
-      0xe457b7ad, 0x335fb903, 0xeb06790c, 0xb3c54bf6, 0x6141e442, 0xa599a482,
-      0xb78987cc, 0xc61dfe9d, 0x0f1d6ace, 0x17460594, 0x8f6a5061, 0x083dc354,
-      0xe9c337fb, 0xcfd105f7, 0x926764b6, 0x638d24dc, 0xeaac650a, 0x67d2cb9c,
-      0xd807733c, 0x205fc52e, 0xf5399e2e, 0x6c46ddcc, 0xb603e875, 0xce113a25,
-      0x3c8d4813, 0xfb584db8, 0xf6d255ff, 0xea80954f, 0x42e8be85, 0xb2feee72,
-      0x62bd8d16, 0x1be4a142, 0x97dca1a4, 0xdd6e7333, 0xb2caa20e, 0xa12b1588,
-      0xeb3a5a1a, 0x6fa5ba89, 0x077ea931, 0x8ddb1713, 0x0dd03079, 0x2c2ba965,
-      0xa77fac17, 0xc8325742, 0x8bb893bf, 0xc2315741, 0xeaceee92, 0x81dd2ee2,
-      0xe5214216, 0x1b9b8fb2, 0x01646d03, 0x24facc25, 0xd8c0e0bb, 0xa33fe106,
-      0xf34fe976, 0xb3b4b44e, 0x65618fed, 0x032c6192, 0xa9dd72ce, 0xf391887b,
-      0xf41c6a6e, 0x05c4bd6d, 0x37fa260e, 0x46b05659, 0xb5f6348a, 0x62d26d89,
-      0x39f6452d, 0xb17b30a2, 0xbdd82743, 0x38ecae3b, 0xfe90f0a2, 0xcb2d226d,
-      0xcf8a0b1c, 0x0eed3d4d, 0xa1f69cfc, 0xd7ac3ba5, 0xce9d9a6b, 0x121deb4c,
-      0x4a0d03f3, 0xc1821ed1, 0x59c249ac, 0xc0abb474, 0x28149985, 0xfd9a82ba,
-      0x5960c3b2, 0xeff00cba, 0x6073aa17, 0x25dc0919, 0x9976626e, 0xdd2ccc33,
-      0x39ecb6ec, 0xc6e15d13, 0xfac94cfd, 0x28cfd34f, 0xf2d2c32d, 0x51c23d08,
-      0x4fdb2f48, 0x97baa807, 0xf2c1004c, 0xc4ae8136, 0x71f31c94, 0x8c92d601,
-      0x36caf5cd,
-  };
-
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  std::seed_seq seed_sequence{1, 2, 3};
-  pcg32_2018_engine engine(seed_sequence);
-  std::ostringstream stream;
-  stream << engine;
-  auto str = stream.str();
-  printf("%s\n\n", str.c_str());
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%08x, ", engine());
-    if (i % 6 == 5) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-
-  EXPECT_FALSE(true);
-#else
-  pcg32_2018_engine engine;
-  std::istringstream stream(
-      "6364136223846793005 1442695040888963407 6537028157270659894");
-  stream >> engine;
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/platform.h b/third_party/abseil/absl/random/internal/platform.h
deleted file mode 100644
index bbdb4e6..0000000
--- a/third_party/abseil/absl/random/internal/platform.h
+++ /dev/null
@@ -1,171 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_PLATFORM_H_
-#define ABSL_RANDOM_INTERNAL_PLATFORM_H_
-
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
-// symbols from arbitrary system and other headers, since it may be built
-// with different flags from other targets, using different levels of
-// optimization, potentially introducing ODR violations.
-
-// -----------------------------------------------------------------------------
-// Platform Feature Checks
-// -----------------------------------------------------------------------------
-
-// Currently supported operating systems and associated preprocessor
-// symbols:
-//
-//   Linux and Linux-derived           __linux__
-//   Android                           __ANDROID__ (implies __linux__)
-//   Linux (non-Android)               __linux__ && !__ANDROID__
-//   Darwin (macOS and iOS)            __APPLE__
-//   Akaros (http://akaros.org)        __ros__
-//   Windows                           _WIN32
-//   NaCL                              __native_client__
-//   AsmJS                             __asmjs__
-//   WebAssembly                       __wasm__
-//   Fuchsia                           __Fuchsia__
-//
-// Note that since Android defines both __ANDROID__ and __linux__, one
-// may probe for either Linux or Android by simply testing for __linux__.
-//
-// NOTE: For __APPLE__ platforms, we use #include <TargetConditionals.h>
-// to distinguish os variants.
-//
-// http://nadeausoftware.com/articles/2012/01/c_c_tip_how_use_compiler_predefined_macros_detect_operating_system
-
-#if defined(__APPLE__)
-#include <TargetConditionals.h>
-#endif
-
-// -----------------------------------------------------------------------------
-// Architecture Checks
-// -----------------------------------------------------------------------------
-
-// These preprocessor directives are trying to determine CPU architecture,
-// including necessary headers to support hardware AES.
-//
-// ABSL_ARCH_{X86/PPC/ARM} macros determine the platform.
-#if defined(__x86_64__) || defined(__x86_64) || defined(_M_AMD64) || \
-    defined(_M_X64)
-#define ABSL_ARCH_X86_64
-#elif defined(__i386) || defined(_M_IX86)
-#define ABSL_ARCH_X86_32
-#elif defined(__aarch64__) || defined(__arm64__) || defined(_M_ARM64)
-#define ABSL_ARCH_AARCH64
-#elif defined(__arm__) || defined(__ARMEL__) || defined(_M_ARM)
-#define ABSL_ARCH_ARM
-#elif defined(__powerpc64__) || defined(__PPC64__) || defined(__powerpc__) || \
-    defined(__ppc__) || defined(__PPC__)
-#define ABSL_ARCH_PPC
-#else
-// Unsupported architecture.
-//  * https://sourceforge.net/p/predef/wiki/Architectures/
-//  * https://msdn.microsoft.com/en-us/library/b0084kay.aspx
-//  * for gcc, clang: "echo | gcc -E -dM -"
-#endif
-
-// -----------------------------------------------------------------------------
-// Attribute Checks
-// -----------------------------------------------------------------------------
-
-// ABSL_RANDOM_INTERNAL_RESTRICT annotates whether pointers may be considered
-// to be unaliased.
-#if defined(__clang__) || defined(__GNUC__)
-#define ABSL_RANDOM_INTERNAL_RESTRICT __restrict__
-#elif defined(_MSC_VER)
-#define ABSL_RANDOM_INTERNAL_RESTRICT __restrict
-#else
-#define ABSL_RANDOM_INTERNAL_RESTRICT
-#endif
-
-// ABSL_HAVE_ACCELERATED_AES indicates whether the currently active compiler
-// flags (e.g. -maes) allow using hardware accelerated AES instructions, which
-// implies us assuming that the target platform supports them.
-#define ABSL_HAVE_ACCELERATED_AES 0
-
-#if defined(ABSL_ARCH_X86_64)
-
-#if defined(__AES__) || defined(__AVX__)
-#undef ABSL_HAVE_ACCELERATED_AES
-#define ABSL_HAVE_ACCELERATED_AES 1
-#endif
-
-#elif defined(ABSL_ARCH_PPC)
-
-// Rely on VSX and CRYPTO extensions for vcipher on PowerPC.
-#if (defined(__VEC__) || defined(__ALTIVEC__)) && defined(__VSX__) && \
-    defined(__CRYPTO__)
-#undef ABSL_HAVE_ACCELERATED_AES
-#define ABSL_HAVE_ACCELERATED_AES 1
-#endif
-
-#elif defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64)
-
-// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0053c/IHI0053C_acle_2_0.pdf
-// Rely on NEON+CRYPTO extensions for ARM.
-#if defined(__ARM_NEON) && defined(__ARM_FEATURE_CRYPTO)
-#undef ABSL_HAVE_ACCELERATED_AES
-#define ABSL_HAVE_ACCELERATED_AES 1
-#endif
-
-#endif
-
-// NaCl does not allow AES.
-#if defined(__native_client__)
-#undef ABSL_HAVE_ACCELERATED_AES
-#define ABSL_HAVE_ACCELERATED_AES 0
-#endif
-
-// ABSL_RANDOM_INTERNAL_AES_DISPATCH indicates whether the currently active
-// platform has, or should use run-time dispatch for selecting the
-// acclerated Randen implementation.
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 0
-
-#if defined(ABSL_ARCH_X86_64)
-// Dispatch is available on x86_64
-#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
-#elif defined(__linux__) && defined(ABSL_ARCH_PPC)
-// Or when running linux PPC
-#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
-#elif defined(__linux__) && defined(ABSL_ARCH_AARCH64)
-// Or when running linux AArch64
-#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
-#elif defined(__linux__) && defined(ABSL_ARCH_ARM) && (__ARM_ARCH >= 8)
-// Or when running linux ARM v8 or higher.
-// (This captures a lot of Android configurations.)
-#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 1
-#endif
-
-// NaCl does not allow dispatch.
-#if defined(__native_client__)
-#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 0
-#endif
-
-// iOS does not support dispatch, even on x86, since applications
-// should be bundled as fat binaries, with a different build tailored for
-// each specific supported platform/architecture.
-#if (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) || \
-    (defined(TARGET_OS_IPHONE_SIMULATOR) && TARGET_OS_IPHONE_SIMULATOR)
-#undef ABSL_RANDOM_INTERNAL_AES_DISPATCH
-#define ABSL_RANDOM_INTERNAL_AES_DISPATCH 0
-#endif
-
-#endif  // ABSL_RANDOM_INTERNAL_PLATFORM_H_
diff --git a/third_party/abseil/absl/random/internal/pool_urbg.cc b/third_party/abseil/absl/random/internal/pool_urbg.cc
deleted file mode 100644
index 5bee530..0000000
--- a/third_party/abseil/absl/random/internal/pool_urbg.cc
+++ /dev/null
@@ -1,254 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/pool_urbg.h"
-
-#include <algorithm>
-#include <atomic>
-#include <cstdint>
-#include <cstring>
-#include <iterator>
-
-#include "absl/base/attributes.h"
-#include "absl/base/call_once.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/internal/sysinfo.h"
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/base/optimization.h"
-#include "absl/random/internal/randen.h"
-#include "absl/random/internal/seed_material.h"
-#include "absl/random/seed_gen_exception.h"
-
-using absl::base_internal::SpinLock;
-using absl::base_internal::SpinLockHolder;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-// RandenPoolEntry is a thread-safe pseudorandom bit generator, implementing a
-// single generator within a RandenPool<T>. It is an internal implementation
-// detail, and does not aim to conform to [rand.req.urng].
-//
-// NOTE: There are alignment issues when used on ARM, for instance.
-// See the allocation code in PoolAlignedAlloc().
-class RandenPoolEntry {
- public:
-  static constexpr size_t kState = RandenTraits::kStateBytes / sizeof(uint32_t);
-  static constexpr size_t kCapacity =
-      RandenTraits::kCapacityBytes / sizeof(uint32_t);
-
-  void Init(absl::Span<const uint32_t> data) {
-    SpinLockHolder l(&mu_);  // Always uncontested.
-    std::copy(data.begin(), data.end(), std::begin(state_));
-    next_ = kState;
-  }
-
-  // Copy bytes into out.
-  void Fill(uint8_t* out, size_t bytes) ABSL_LOCKS_EXCLUDED(mu_);
-
-  // Returns random bits from the buffer in units of T.
-  template <typename T>
-  inline T Generate() ABSL_LOCKS_EXCLUDED(mu_);
-
-  inline void MaybeRefill() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_) {
-    if (next_ >= kState) {
-      next_ = kCapacity;
-      impl_.Generate(state_);
-    }
-  }
-
- private:
-  // Randen URBG state.
-  uint32_t state_[kState] ABSL_GUARDED_BY(mu_);  // First to satisfy alignment.
-  SpinLock mu_;
-  const Randen impl_;
-  size_t next_ ABSL_GUARDED_BY(mu_);
-};
-
-template <>
-inline uint8_t RandenPoolEntry::Generate<uint8_t>() {
-  SpinLockHolder l(&mu_);
-  MaybeRefill();
-  return static_cast<uint8_t>(state_[next_++]);
-}
-
-template <>
-inline uint16_t RandenPoolEntry::Generate<uint16_t>() {
-  SpinLockHolder l(&mu_);
-  MaybeRefill();
-  return static_cast<uint16_t>(state_[next_++]);
-}
-
-template <>
-inline uint32_t RandenPoolEntry::Generate<uint32_t>() {
-  SpinLockHolder l(&mu_);
-  MaybeRefill();
-  return state_[next_++];
-}
-
-template <>
-inline uint64_t RandenPoolEntry::Generate<uint64_t>() {
-  SpinLockHolder l(&mu_);
-  if (next_ >= kState - 1) {
-    next_ = kCapacity;
-    impl_.Generate(state_);
-  }
-  auto p = state_ + next_;
-  next_ += 2;
-
-  uint64_t result;
-  std::memcpy(&result, p, sizeof(result));
-  return result;
-}
-
-void RandenPoolEntry::Fill(uint8_t* out, size_t bytes) {
-  SpinLockHolder l(&mu_);
-  while (bytes > 0) {
-    MaybeRefill();
-    size_t remaining = (kState - next_) * sizeof(state_[0]);
-    size_t to_copy = std::min(bytes, remaining);
-    std::memcpy(out, &state_[next_], to_copy);
-    out += to_copy;
-    bytes -= to_copy;
-    next_ += (to_copy + sizeof(state_[0]) - 1) / sizeof(state_[0]);
-  }
-}
-
-// Number of pooled urbg entries.
-static constexpr int kPoolSize = 8;
-
-// Shared pool entries.
-static absl::once_flag pool_once;
-ABSL_CACHELINE_ALIGNED static RandenPoolEntry* shared_pools[kPoolSize];
-
-// Returns an id in the range [0 ... kPoolSize), which indexes into the
-// pool of random engines.
-//
-// Each thread to access the pool is assigned a sequential ID (without reuse)
-// from the pool-id space; the id is cached in a thread_local variable.
-// This id is assigned based on the arrival-order of the thread to the
-// GetPoolID call; this has no binary, CL, or runtime stability because
-// on subsequent runs the order within the same program may be significantly
-// different. However, as other thread IDs are not assigned sequentially,
-// this is not expected to matter.
-int GetPoolID() {
-  static_assert(kPoolSize >= 1,
-                "At least one urbg instance is required for PoolURBG");
-
-  ABSL_CONST_INIT static std::atomic<int64_t> sequence{0};
-
-#ifdef ABSL_HAVE_THREAD_LOCAL
-  static thread_local int my_pool_id = -1;
-  if (ABSL_PREDICT_FALSE(my_pool_id < 0)) {
-    my_pool_id = (sequence++ % kPoolSize);
-  }
-  return my_pool_id;
-#else
-  static pthread_key_t tid_key = [] {
-    pthread_key_t tmp_key;
-    int err = pthread_key_create(&tmp_key, nullptr);
-    if (err) {
-      ABSL_RAW_LOG(FATAL, "pthread_key_create failed with %d", err);
-    }
-    return tmp_key;
-  }();
-
-  // Store the value in the pthread_{get/set}specific. However an uninitialized
-  // value is 0, so add +1 to distinguish from the null value.
-  intptr_t my_pool_id =
-      reinterpret_cast<intptr_t>(pthread_getspecific(tid_key));
-  if (ABSL_PREDICT_FALSE(my_pool_id == 0)) {
-    // No allocated ID, allocate the next value, cache it, and return.
-    my_pool_id = (sequence++ % kPoolSize) + 1;
-    int err = pthread_setspecific(tid_key, reinterpret_cast<void*>(my_pool_id));
-    if (err) {
-      ABSL_RAW_LOG(FATAL, "pthread_setspecific failed with %d", err);
-    }
-  }
-  return my_pool_id - 1;
-#endif
-}
-
-// Allocate a RandenPoolEntry with at least 32-byte alignment, which is required
-// by ARM platform code.
-RandenPoolEntry* PoolAlignedAlloc() {
-  constexpr size_t kAlignment =
-      ABSL_CACHELINE_SIZE > 32 ? ABSL_CACHELINE_SIZE : 32;
-
-  // Not all the platforms that we build for have std::aligned_alloc, however
-  // since we never free these objects, we can over allocate and munge the
-  // pointers to the correct alignment.
-  void* memory = std::malloc(sizeof(RandenPoolEntry) + kAlignment);
-  auto x = reinterpret_cast<intptr_t>(memory);
-  auto y = x % kAlignment;
-  void* aligned =
-      (y == 0) ? memory : reinterpret_cast<void*>(x + kAlignment - y);
-  return new (aligned) RandenPoolEntry();
-}
-
-// Allocate and initialize kPoolSize objects of type RandenPoolEntry.
-//
-// The initialization strategy is to initialize one object directly from
-// OS entropy, then to use that object to seed all of the individual
-// pool instances.
-void InitPoolURBG() {
-  static constexpr size_t kSeedSize =
-      RandenTraits::kStateBytes / sizeof(uint32_t);
-  // Read the seed data from OS entropy once.
-  uint32_t seed_material[kPoolSize * kSeedSize];
-  if (!random_internal::ReadSeedMaterialFromOSEntropy(
-          absl::MakeSpan(seed_material))) {
-    random_internal::ThrowSeedGenException();
-  }
-  for (int i = 0; i < kPoolSize; i++) {
-    shared_pools[i] = PoolAlignedAlloc();
-    shared_pools[i]->Init(
-        absl::MakeSpan(&seed_material[i * kSeedSize], kSeedSize));
-  }
-}
-
-// Returns the pool entry for the current thread.
-RandenPoolEntry* GetPoolForCurrentThread() {
-  absl::call_once(pool_once, InitPoolURBG);
-  return shared_pools[GetPoolID()];
-}
-
-}  // namespace
-
-template <typename T>
-typename RandenPool<T>::result_type RandenPool<T>::Generate() {
-  auto* pool = GetPoolForCurrentThread();
-  return pool->Generate<T>();
-}
-
-template <typename T>
-void RandenPool<T>::Fill(absl::Span<result_type> data) {
-  auto* pool = GetPoolForCurrentThread();
-  pool->Fill(reinterpret_cast<uint8_t*>(data.data()),
-             data.size() * sizeof(result_type));
-}
-
-template class RandenPool<uint8_t>;
-template class RandenPool<uint16_t>;
-template class RandenPool<uint32_t>;
-template class RandenPool<uint64_t>;
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/pool_urbg.h b/third_party/abseil/absl/random/internal/pool_urbg.h
deleted file mode 100644
index 0572192..0000000
--- a/third_party/abseil/absl/random/internal/pool_urbg.h
+++ /dev/null
@@ -1,131 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_POOL_URBG_H_
-#define ABSL_RANDOM_INTERNAL_POOL_URBG_H_
-
-#include <cinttypes>
-#include <limits>
-
-#include "absl/random/internal/traits.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RandenPool is a thread-safe random number generator [random.req.urbg] that
-// uses an underlying pool of Randen generators to generate values.  Each thread
-// has affinity to one instance of the underlying pool generators.  Concurrent
-// access is guarded by a spin-lock.
-template <typename T>
-class RandenPool {
- public:
-  using result_type = T;
-  static_assert(std::is_unsigned<result_type>::value,
-                "RandenPool template argument must be a built-in unsigned "
-                "integer type");
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  RandenPool() {}
-
-  // Returns a single value.
-  inline result_type operator()() { return Generate(); }
-
-  // Fill data with random values.
-  static void Fill(absl::Span<result_type> data);
-
- protected:
-  // Generate returns a single value.
-  static result_type Generate();
-};
-
-extern template class RandenPool<uint8_t>;
-extern template class RandenPool<uint16_t>;
-extern template class RandenPool<uint32_t>;
-extern template class RandenPool<uint64_t>;
-
-// PoolURBG uses an underlying pool of random generators to implement a
-// thread-compatible [random.req.urbg] interface with an internal cache of
-// values.
-template <typename T, size_t kBufferSize>
-class PoolURBG {
-  // Inheritance to access the protected static members of RandenPool.
-  using unsigned_type = typename make_unsigned_bits<T>::type;
-  using PoolType = RandenPool<unsigned_type>;
-  using SpanType = absl::Span<unsigned_type>;
-
-  static constexpr size_t kInitialBuffer = kBufferSize + 1;
-  static constexpr size_t kHalfBuffer = kBufferSize / 2;
-
- public:
-  using result_type = T;
-
-  static_assert(std::is_unsigned<result_type>::value,
-                "PoolURBG must be parameterized by an unsigned integer type");
-
-  static_assert(kBufferSize > 1,
-                "PoolURBG must be parameterized by a buffer-size > 1");
-
-  static_assert(kBufferSize <= 256,
-                "PoolURBG must be parameterized by a buffer-size <= 256");
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  PoolURBG() : next_(kInitialBuffer) {}
-
-  // copy-constructor does not copy cache.
-  PoolURBG(const PoolURBG&) : next_(kInitialBuffer) {}
-  const PoolURBG& operator=(const PoolURBG&) {
-    next_ = kInitialBuffer;
-    return *this;
-  }
-
-  // move-constructor does move cache.
-  PoolURBG(PoolURBG&&) = default;
-  PoolURBG& operator=(PoolURBG&&) = default;
-
-  inline result_type operator()() {
-    if (next_ >= kBufferSize) {
-      next_ = (kBufferSize > 2 && next_ > kBufferSize) ? kHalfBuffer : 0;
-      PoolType::Fill(SpanType(reinterpret_cast<unsigned_type*>(state_ + next_),
-                              kBufferSize - next_));
-    }
-    return state_[next_++];
-  }
-
- private:
-  // Buffer size.
-  size_t next_;  // index within state_
-  result_type state_[kBufferSize];
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_POOL_URBG_H_
diff --git a/third_party/abseil/absl/random/internal/pool_urbg_test.cc b/third_party/abseil/absl/random/internal/pool_urbg_test.cc
deleted file mode 100644
index 53f4eac..0000000
--- a/third_party/abseil/absl/random/internal/pool_urbg_test.cc
+++ /dev/null
@@ -1,182 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/pool_urbg.h"
-
-#include <algorithm>
-#include <bitset>
-#include <cmath>
-#include <cstdint>
-#include <iterator>
-
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/span.h"
-
-using absl::random_internal::PoolURBG;
-using absl::random_internal::RandenPool;
-
-namespace {
-
-// is_randen_pool trait is true when parameterized by an RandenPool
-template <typename T>
-using is_randen_pool = typename absl::disjunction<  //
-    std::is_same<T, RandenPool<uint8_t>>,           //
-    std::is_same<T, RandenPool<uint16_t>>,          //
-    std::is_same<T, RandenPool<uint32_t>>,          //
-    std::is_same<T, RandenPool<uint64_t>>>;         //
-
-// MyFill either calls RandenPool::Fill() or std::generate(..., rng)
-template <typename T, typename V>
-typename absl::enable_if_t<absl::negation<is_randen_pool<T>>::value, void>  //
-MyFill(T& rng, absl::Span<V> data) {  // NOLINT(runtime/references)
-  std::generate(std::begin(data), std::end(data), rng);
-}
-
-template <typename T, typename V>
-typename absl::enable_if_t<is_randen_pool<T>::value, void>  //
-MyFill(T& rng, absl::Span<V> data) {  // NOLINT(runtime/references)
-  rng.Fill(data);
-}
-
-template <typename EngineType>
-class PoolURBGTypedTest : public ::testing::Test {};
-
-using EngineTypes = ::testing::Types<  //
-    RandenPool<uint8_t>,               //
-    RandenPool<uint16_t>,              //
-    RandenPool<uint32_t>,              //
-    RandenPool<uint64_t>,              //
-    PoolURBG<uint8_t, 2>,              //
-    PoolURBG<uint16_t, 2>,             //
-    PoolURBG<uint32_t, 2>,             //
-    PoolURBG<uint64_t, 2>,             //
-    PoolURBG<unsigned int, 8>,         // NOLINT(runtime/int)
-    PoolURBG<unsigned long, 8>,        // NOLINT(runtime/int)
-    PoolURBG<unsigned long int, 4>,    // NOLINT(runtime/int)
-    PoolURBG<unsigned long long, 4>>;  // NOLINT(runtime/int)
-
-TYPED_TEST_SUITE(PoolURBGTypedTest, EngineTypes);
-
-// This test is checks that the engines meet the URBG interface requirements
-// defined in [rand.req.urbg].
-TYPED_TEST(PoolURBGTypedTest, URBGInterface) {
-  using E = TypeParam;
-  using T = typename E::result_type;
-
-  static_assert(std::is_copy_constructible<E>::value,
-                "engine must be copy constructible");
-
-  static_assert(absl::is_copy_assignable<E>::value,
-                "engine must be copy assignable");
-
-  E e;
-  const E x;
-
-  e();
-
-  static_assert(std::is_same<decltype(e()), T>::value,
-                "return type of operator() must be result_type");
-
-  E u0(x);
-  u0();
-
-  E u1 = e;
-  u1();
-}
-
-// This validates that sequences are independent.
-TYPED_TEST(PoolURBGTypedTest, VerifySequences) {
-  using E = TypeParam;
-  using result_type = typename E::result_type;
-
-  E rng;
-  (void)rng();  // Discard one value.
-
-  constexpr int kNumOutputs = 64;
-  result_type a[kNumOutputs];
-  result_type b[kNumOutputs];
-  std::fill(std::begin(b), std::end(b), 0);
-
-  // Fill a using Fill or generate, depending on the engine type.
-  {
-    E x = rng;
-    MyFill(x, absl::MakeSpan(a));
-  }
-
-  // Fill b using std::generate().
-  {
-    E x = rng;
-    std::generate(std::begin(b), std::end(b), x);
-  }
-
-  // Test that generated sequence changed as sequence of bits, i.e. if about
-  // half of the bites were flipped between two non-correlated values.
-  size_t changed_bits = 0;
-  size_t unchanged_bits = 0;
-  size_t total_set = 0;
-  size_t total_bits = 0;
-  size_t equal_count = 0;
-  for (size_t i = 0; i < kNumOutputs; ++i) {
-    equal_count += (a[i] == b[i]) ? 1 : 0;
-    std::bitset<sizeof(result_type) * 8> bitset(a[i] ^ b[i]);
-    changed_bits += bitset.count();
-    unchanged_bits += bitset.size() - bitset.count();
-
-    std::bitset<sizeof(result_type) * 8> a_set(a[i]);
-    std::bitset<sizeof(result_type) * 8> b_set(b[i]);
-    total_set += a_set.count() + b_set.count();
-    total_bits += 2 * 8 * sizeof(result_type);
-  }
-  // On average, half the bits are changed between two calls.
-  EXPECT_LE(changed_bits, 0.60 * (changed_bits + unchanged_bits));
-  EXPECT_GE(changed_bits, 0.40 * (changed_bits + unchanged_bits));
-
-  // verify using a quick normal-approximation to the binomial.
-  EXPECT_NEAR(total_set, total_bits * 0.5, 4 * std::sqrt(total_bits))
-      << "@" << total_set / static_cast<double>(total_bits);
-
-  // Also, A[i] == B[i] with probability (1/range) * N.
-  // Give this a pretty wide latitude, though.
-  const double kExpected = kNumOutputs / (1.0 * sizeof(result_type) * 8);
-  EXPECT_LE(equal_count, 1.0 + kExpected);
-}
-
-}  // namespace
-
-/*
-$ nanobenchmarks 1 RandenPool construct
-$ nanobenchmarks 1 PoolURBG construct
-
-RandenPool<uint32_t> | 1    | 1000 |    48482.00 ticks | 48.48 ticks | 13.9 ns
-RandenPool<uint32_t> | 10   | 2000 |  1028795.00 ticks | 51.44 ticks | 14.7 ns
-RandenPool<uint32_t> | 100  | 1000 |  5119968.00 ticks | 51.20 ticks | 14.6 ns
-RandenPool<uint32_t> | 1000 |  500 | 25867936.00 ticks | 51.74 ticks | 14.8 ns
-
-RandenPool<uint64_t> | 1    | 1000 |    49921.00 ticks | 49.92 ticks | 14.3 ns
-RandenPool<uint64_t> | 10   | 2000 |  1208269.00 ticks | 60.41 ticks | 17.3 ns
-RandenPool<uint64_t> | 100  | 1000 |  5844955.00 ticks | 58.45 ticks | 16.7 ns
-RandenPool<uint64_t> | 1000 |  500 | 28767404.00 ticks | 57.53 ticks | 16.4 ns
-
-PoolURBG<uint32_t,8> | 1    | 1000 |    86431.00 ticks | 86.43 ticks | 24.7 ns
-PoolURBG<uint32_t,8> | 10   | 1000 |   206191.00 ticks | 20.62 ticks |  5.9 ns
-PoolURBG<uint32_t,8> | 100  | 1000 |  1516049.00 ticks | 15.16 ticks |  4.3 ns
-PoolURBG<uint32_t,8> | 1000 |  500 |  7613936.00 ticks | 15.23 ticks |  4.4 ns
-
-PoolURBG<uint64_t,4> | 1    | 1000 |    96668.00 ticks | 96.67 ticks | 27.6 ns
-PoolURBG<uint64_t,4> | 10   | 1000 |   282423.00 ticks | 28.24 ticks |  8.1 ns
-PoolURBG<uint64_t,4> | 100  | 1000 |  2609587.00 ticks | 26.10 ticks |  7.5 ns
-PoolURBG<uint64_t,4> | 1000 |  500 | 12408757.00 ticks | 24.82 ticks |  7.1 ns
-
-*/
diff --git a/third_party/abseil/absl/random/internal/randen.cc b/third_party/abseil/absl/random/internal/randen.cc
deleted file mode 100644
index c1bc044..0000000
--- a/third_party/abseil/absl/random/internal/randen.cc
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen.h"
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/randen_detect.h"
-
-// RANDen = RANDom generator or beetroots in Swiss High German.
-// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
-// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
-//
-// High-level summary:
-// 1) Reverie (see "A Robust and Sponge-Like PRNG with Improved Efficiency") is
-//    a sponge-like random generator that requires a cryptographic permutation.
-//    It improves upon "Provably Robust Sponge-Based PRNGs and KDFs" by
-//    achieving backtracking resistance with only one Permute() per buffer.
-//
-// 2) "Simpira v2: A Family of Efficient Permutations Using the AES Round
-//    Function" constructs up to 1024-bit permutations using an improved
-//    Generalized Feistel network with 2-round AES-128 functions. This Feistel
-//    block shuffle achieves diffusion faster and is less vulnerable to
-//    sliced-biclique attacks than the Type-2 cyclic shuffle.
-//
-// 3) "Improving the Generalized Feistel" and "New criterion for diffusion
-//    property" extends the same kind of improved Feistel block shuffle to 16
-//    branches, which enables a 2048-bit permutation.
-//
-// We combine these three ideas and also change Simpira's subround keys from
-// structured/low-entropy counters to digits of Pi.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-struct RandenState {
-  const void* keys;
-  bool has_crypto;
-};
-
-RandenState GetRandenState() {
-  static const RandenState state = []() {
-    RandenState tmp;
-#if ABSL_RANDOM_INTERNAL_AES_DISPATCH
-    // HW AES Dispatch.
-    if (HasRandenHwAesImplementation() && CPUSupportsRandenHwAes()) {
-      tmp.has_crypto = true;
-      tmp.keys = RandenHwAes::GetKeys();
-    } else {
-      tmp.has_crypto = false;
-      tmp.keys = RandenSlow::GetKeys();
-    }
-#elif ABSL_HAVE_ACCELERATED_AES
-    // HW AES is enabled.
-    tmp.has_crypto = true;
-    tmp.keys = RandenHwAes::GetKeys();
-#else
-    // HW AES is disabled.
-    tmp.has_crypto = false;
-    tmp.keys = RandenSlow::GetKeys();
-#endif
-    return tmp;
-  }();
-  return state;
-}
-
-}  // namespace
-
-Randen::Randen() {
-  auto tmp = GetRandenState();
-  keys_ = tmp.keys;
-#if ABSL_RANDOM_INTERNAL_AES_DISPATCH
-  has_crypto_ = tmp.has_crypto;
-#endif
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/randen.h b/third_party/abseil/absl/random/internal/randen.h
deleted file mode 100644
index 9a3840b..0000000
--- a/third_party/abseil/absl/random/internal/randen.h
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_H_
-
-#include <cstddef>
-
-#include "absl/random/internal/platform.h"
-#include "absl/random/internal/randen_hwaes.h"
-#include "absl/random/internal/randen_slow.h"
-#include "absl/random/internal/randen_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RANDen = RANDom generator or beetroots in Swiss High German.
-// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
-// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
-//
-// Randen implements the basic state manipulation methods.
-class Randen {
- public:
-  static constexpr size_t kStateBytes = RandenTraits::kStateBytes;
-  static constexpr size_t kCapacityBytes = RandenTraits::kCapacityBytes;
-  static constexpr size_t kSeedBytes = RandenTraits::kSeedBytes;
-
-  ~Randen() = default;
-
-  Randen();
-
-  // Generate updates the randen sponge. The outer portion of the sponge
-  // (kCapacityBytes .. kStateBytes) may be consumed as PRNG state.
-  template <typename T, size_t N>
-  void Generate(T (&state)[N]) const {
-    static_assert(N * sizeof(T) == kStateBytes,
-                  "Randen::Generate() requires kStateBytes of state");
-#if ABSL_RANDOM_INTERNAL_AES_DISPATCH
-    // HW AES Dispatch.
-    if (has_crypto_) {
-      RandenHwAes::Generate(keys_, state);
-    } else {
-      RandenSlow::Generate(keys_, state);
-    }
-#elif ABSL_HAVE_ACCELERATED_AES
-    // HW AES is enabled.
-    RandenHwAes::Generate(keys_, state);
-#else
-    // HW AES is disabled.
-    RandenSlow::Generate(keys_, state);
-#endif
-  }
-
-  // Absorb incorporates additional seed material into the randen sponge.  After
-  // absorb returns, Generate must be called before the state may be consumed.
-  template <typename S, size_t M, typename T, size_t N>
-  void Absorb(const S (&seed)[M], T (&state)[N]) const {
-    static_assert(M * sizeof(S) == RandenTraits::kSeedBytes,
-                  "Randen::Absorb() requires kSeedBytes of seed");
-
-    static_assert(N * sizeof(T) == RandenTraits::kStateBytes,
-                  "Randen::Absorb() requires kStateBytes of state");
-#if ABSL_RANDOM_INTERNAL_AES_DISPATCH
-    // HW AES Dispatch.
-    if (has_crypto_) {
-      RandenHwAes::Absorb(seed, state);
-    } else {
-      RandenSlow::Absorb(seed, state);
-    }
-#elif ABSL_HAVE_ACCELERATED_AES
-    // HW AES is enabled.
-    RandenHwAes::Absorb(seed, state);
-#else
-    // HW AES is disabled.
-    RandenSlow::Absorb(seed, state);
-#endif
-  }
-
- private:
-  const void* keys_;
-#if ABSL_RANDOM_INTERNAL_AES_DISPATCH
-  bool has_crypto_;
-#endif
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_H_
diff --git a/third_party/abseil/absl/random/internal/randen_benchmarks.cc b/third_party/abseil/absl/random/internal/randen_benchmarks.cc
deleted file mode 100644
index f589172..0000000
--- a/third_party/abseil/absl/random/internal/randen_benchmarks.cc
+++ /dev/null
@@ -1,174 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#include "absl/random/internal/randen.h"
-
-#include <cstdint>
-#include <cstdio>
-#include <cstring>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/nanobenchmark.h"
-#include "absl/random/internal/platform.h"
-#include "absl/random/internal/randen_engine.h"
-#include "absl/random/internal/randen_hwaes.h"
-#include "absl/random/internal/randen_slow.h"
-#include "absl/strings/numbers.h"
-
-namespace {
-
-using absl::random_internal::Randen;
-using absl::random_internal::RandenHwAes;
-using absl::random_internal::RandenSlow;
-
-using absl::random_internal_nanobenchmark::FuncInput;
-using absl::random_internal_nanobenchmark::FuncOutput;
-using absl::random_internal_nanobenchmark::InvariantTicksPerSecond;
-using absl::random_internal_nanobenchmark::MeasureClosure;
-using absl::random_internal_nanobenchmark::Params;
-using absl::random_internal_nanobenchmark::PinThreadToCPU;
-using absl::random_internal_nanobenchmark::Result;
-
-// Local state parameters.
-static constexpr size_t kStateSizeT = Randen::kStateBytes / sizeof(uint64_t);
-static constexpr size_t kSeedSizeT = Randen::kSeedBytes / sizeof(uint32_t);
-
-// Randen implementation benchmarks.
-template <typename T>
-struct AbsorbFn : public T {
-  mutable uint64_t state[kStateSizeT] = {};
-  mutable uint32_t seed[kSeedSizeT] = {};
-
-  static constexpr size_t bytes() { return sizeof(seed); }
-
-  FuncOutput operator()(const FuncInput num_iters) const {
-    for (size_t i = 0; i < num_iters; ++i) {
-      this->Absorb(seed, state);
-    }
-    return state[0];
-  }
-};
-
-template <typename T>
-struct GenerateFn : public T {
-  mutable uint64_t state[kStateSizeT];
-  GenerateFn() { std::memset(state, 0, sizeof(state)); }
-
-  static constexpr size_t bytes() { return sizeof(state); }
-
-  FuncOutput operator()(const FuncInput num_iters) const {
-    const auto* keys = this->GetKeys();
-    for (size_t i = 0; i < num_iters; ++i) {
-      this->Generate(keys, state);
-    }
-    return state[0];
-  }
-};
-
-template <typename UInt>
-struct Engine {
-  mutable absl::random_internal::randen_engine<UInt> rng;
-
-  static constexpr size_t bytes() { return sizeof(UInt); }
-
-  FuncOutput operator()(const FuncInput num_iters) const {
-    for (size_t i = 0; i < num_iters - 1; ++i) {
-      rng();
-    }
-    return rng();
-  }
-};
-
-template <size_t N>
-void Print(const char* name, const size_t n, const Result (&results)[N],
-           const size_t bytes) {
-  if (n == 0) {
-    ABSL_RAW_LOG(
-        WARNING,
-        "WARNING: Measurement failed, should not happen when using "
-        "PinThreadToCPU unless the region to measure takes > 1 second.\n");
-    return;
-  }
-
-  static const double ns_per_tick = 1e9 / InvariantTicksPerSecond();
-  static constexpr const double kNsPerS = 1e9;                 // ns/s
-  static constexpr const double kMBPerByte = 1.0 / 1048576.0;  // Mb / b
-  static auto header = [] {
-    return printf("%20s %8s: %12s ticks; %9s  (%9s) %8s\n", "Name", "Count",
-                  "Total", "Variance", "Time", "bytes/s");
-  }();
-  (void)header;
-
-  for (size_t i = 0; i < n; ++i) {
-    const double ticks_per_call = results[i].ticks / results[i].input;
-    const double ns_per_call = ns_per_tick * ticks_per_call;
-    const double bytes_per_ns = bytes / ns_per_call;
-    const double mb_per_s = bytes_per_ns * kNsPerS * kMBPerByte;
-    // Output
-    printf("%20s %8zu: %12.2f ticks; MAD=%4.2f%%  (%6.1f ns) %8.1f Mb/s\n",
-           name, results[i].input, results[i].ticks,
-           results[i].variability * 100.0, ns_per_call, mb_per_s);
-  }
-}
-
-// Fails here
-template <typename Op, size_t N>
-void Measure(const char* name, const FuncInput (&inputs)[N]) {
-  Op op;
-
-  Result results[N];
-  Params params;
-  params.verbose = false;
-  params.max_evals = 6;  // avoid test timeout
-  const size_t num_results = MeasureClosure(op, inputs, N, results, params);
-  Print(name, num_results, results, op.bytes());
-}
-
-// unpredictable == 1 but the compiler does not know that.
-void RunAll(const int argc, char* argv[]) {
-  if (argc == 2) {
-    int cpu = -1;
-    if (!absl::SimpleAtoi(argv[1], &cpu)) {
-      ABSL_RAW_LOG(FATAL, "The optional argument must be a CPU number >= 0.\n");
-    }
-    PinThreadToCPU(cpu);
-  }
-
-  // The compiler cannot reduce this to a constant.
-  const FuncInput unpredictable = (argc != 999);
-  static const FuncInput inputs[] = {unpredictable * 100, unpredictable * 1000};
-
-#if !defined(ABSL_INTERNAL_DISABLE_AES) && ABSL_HAVE_ACCELERATED_AES
-  Measure<AbsorbFn<RandenHwAes>>("Absorb (HwAes)", inputs);
-#endif
-  Measure<AbsorbFn<RandenSlow>>("Absorb (Slow)", inputs);
-
-#if !defined(ABSL_INTERNAL_DISABLE_AES) && ABSL_HAVE_ACCELERATED_AES
-  Measure<GenerateFn<RandenHwAes>>("Generate (HwAes)", inputs);
-#endif
-  Measure<GenerateFn<RandenSlow>>("Generate (Slow)", inputs);
-
-  // Measure the production engine.
-  static const FuncInput inputs1[] = {unpredictable * 1000,
-                                      unpredictable * 10000};
-  Measure<Engine<uint64_t>>("randen_engine<uint64_t>", inputs1);
-  Measure<Engine<uint32_t>>("randen_engine<uint32_t>", inputs1);
-}
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-  RunAll(argc, argv);
-  return 0;
-}
diff --git a/third_party/abseil/absl/random/internal/randen_detect.cc b/third_party/abseil/absl/random/internal/randen_detect.cc
deleted file mode 100644
index bbe7b96..0000000
--- a/third_party/abseil/absl/random/internal/randen_detect.cc
+++ /dev/null
@@ -1,221 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
-// symbols from arbitrary system and other headers, since it may be built
-// with different flags from other targets, using different levels of
-// optimization, potentially introducing ODR violations.
-
-#include "absl/random/internal/randen_detect.h"
-
-#include <cstdint>
-#include <cstring>
-
-#include "absl/random/internal/platform.h"
-
-#if defined(ABSL_ARCH_X86_64)
-#define ABSL_INTERNAL_USE_X86_CPUID
-#elif defined(ABSL_ARCH_PPC) || defined(ABSL_ARCH_ARM) || \
-    defined(ABSL_ARCH_AARCH64)
-#if defined(__ANDROID__)
-#define ABSL_INTERNAL_USE_ANDROID_GETAUXVAL
-#define ABSL_INTERNAL_USE_GETAUXVAL
-#elif defined(__linux__)
-#define ABSL_INTERNAL_USE_LINUX_GETAUXVAL
-#define ABSL_INTERNAL_USE_GETAUXVAL
-#endif
-#endif
-
-#if defined(ABSL_INTERNAL_USE_X86_CPUID)
-#if defined(_WIN32) || defined(_WIN64)
-#include <intrin.h>  // NOLINT(build/include_order)
-#pragma intrinsic(__cpuid)
-#else
-// MSVC-equivalent __cpuid intrinsic function.
-static void __cpuid(int cpu_info[4], int info_type) {
-  __asm__ volatile("cpuid \n\t"
-                   : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]),
-                     "=d"(cpu_info[3])
-                   : "a"(info_type), "c"(0));
-}
-#endif
-#endif  // ABSL_INTERNAL_USE_X86_CPUID
-
-// On linux, just use the c-library getauxval call.
-#if defined(ABSL_INTERNAL_USE_LINUX_GETAUXVAL)
-
-extern "C" unsigned long getauxval(unsigned long type);  // NOLINT(runtime/int)
-
-static uint32_t GetAuxval(uint32_t hwcap_type) {
-  return static_cast<uint32_t>(getauxval(hwcap_type));
-}
-
-#endif
-
-// On android, probe the system's C library for getauxval().
-// This is the same technique used by the android NDK cpu features library
-// as well as the google open-source cpu_features library.
-//
-// TODO(absl-team): Consider implementing a fallback of directly reading
-// /proc/self/auxval.
-#if defined(ABSL_INTERNAL_USE_ANDROID_GETAUXVAL)
-#include <dlfcn.h>
-
-static uint32_t GetAuxval(uint32_t hwcap_type) {
-  // NOLINTNEXTLINE(runtime/int)
-  typedef unsigned long (*getauxval_func_t)(unsigned long);
-
-  dlerror();  // Cleaning error state before calling dlopen.
-  void* libc_handle = dlopen("libc.so", RTLD_NOW);
-  if (!libc_handle) {
-    return 0;
-  }
-  uint32_t result = 0;
-  void* sym = dlsym(libc_handle, "getauxval");
-  if (sym) {
-    getauxval_func_t func;
-    memcpy(&func, &sym, sizeof(func));
-    result = static_cast<uint32_t>((*func)(hwcap_type));
-  }
-  dlclose(libc_handle);
-  return result;
-}
-
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// The default return at the end of the function might be unreachable depending
-// on the configuration. Ignore that warning.
-#if defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wunreachable-code-return"
-#endif
-
-// CPUSupportsRandenHwAes returns whether the CPU is a microarchitecture
-// which supports the crpyto/aes instructions or extensions necessary to use the
-// accelerated RandenHwAes implementation.
-//
-// 1. For x86 it is sufficient to use the CPUID instruction to detect whether
-//    the cpu supports AES instructions. Done.
-//
-// Fon non-x86 it is much more complicated.
-//
-// 2. When ABSL_INTERNAL_USE_GETAUXVAL is defined, use getauxval() (either
-//    the direct c-library version, or the android probing version which loads
-//    libc), and read the hardware capability bits.
-//    This is based on the technique used by boringssl uses to detect
-//    cpu capabilities, and should allow us to enable crypto in the android
-//    builds where it is supported.
-//
-// 3. Use the default for the compiler architecture.
-//
-
-bool CPUSupportsRandenHwAes() {
-#if defined(ABSL_INTERNAL_USE_X86_CPUID)
-  // 1. For x86: Use CPUID to detect the required AES instruction set.
-  int regs[4];
-  __cpuid(reinterpret_cast<int*>(regs), 1);
-  return regs[2] & (1 << 25);  // AES
-
-#elif defined(ABSL_INTERNAL_USE_GETAUXVAL)
-  // 2. Use getauxval() to read the hardware bits and determine
-  // cpu capabilities.
-
-#define AT_HWCAP 16
-#define AT_HWCAP2 26
-#if defined(ABSL_ARCH_PPC)
-  // For Power / PPC: Expect that the cpu supports VCRYPTO
-  // See https://members.openpowerfoundation.org/document/dl/576
-  // VCRYPTO should be present in POWER8 >= 2.07.
-  // Uses Linux kernel constants from arch/powerpc/include/uapi/asm/cputable.h
-  static const uint32_t kVCRYPTO = 0x02000000;
-  const uint32_t hwcap = GetAuxval(AT_HWCAP2);
-  return (hwcap & kVCRYPTO) != 0;
-
-#elif defined(ABSL_ARCH_ARM)
-  // For ARM: Require crypto+neon
-  // http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0500f/CIHBIBBA.html
-  // Uses Linux kernel constants from arch/arm64/include/asm/hwcap.h
-  static const uint32_t kNEON = 1 << 12;
-  uint32_t hwcap = GetAuxval(AT_HWCAP);
-  if ((hwcap & kNEON) == 0) {
-    return false;
-  }
-
-  // And use it again to detect AES.
-  static const uint32_t kAES = 1 << 0;
-  const uint32_t hwcap2 = GetAuxval(AT_HWCAP2);
-  return (hwcap2 & kAES) != 0;
-
-#elif defined(ABSL_ARCH_AARCH64)
-  // For AARCH64: Require crypto+neon
-  // http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0500f/CIHBIBBA.html
-  static const uint32_t kNEON = 1 << 1;
-  static const uint32_t kAES = 1 << 3;
-  const uint32_t hwcap = GetAuxval(AT_HWCAP);
-  return ((hwcap & kNEON) != 0) && ((hwcap & kAES) != 0);
-#endif
-
-#else  // ABSL_INTERNAL_USE_GETAUXVAL
-  // 3. By default, assume that the compiler default.
-  return ABSL_HAVE_ACCELERATED_AES ? true : false;
-
-#endif
-  // NOTE: There are some other techniques that may be worth trying:
-  //
-  // * Use an environment variable: ABSL_RANDOM_USE_HWAES
-  //
-  // * Rely on compiler-generated target-based dispatch.
-  // Using x86/gcc it might look something like this:
-  //
-  // int __attribute__((target("aes"))) HasAes() { return 1; }
-  // int __attribute__((target("default"))) HasAes() { return 0; }
-  //
-  // This does not work on all architecture/compiler combinations.
-  //
-  // * On Linux consider reading /proc/cpuinfo and/or /proc/self/auxv.
-  // These files have lines which are easy to parse; for ARM/AARCH64 it is quite
-  // easy to find the Features: line and extract aes / neon. Likewise for
-  // PPC.
-  //
-  // * Fork a process and test for SIGILL:
-  //
-  // * Many architectures have instructions to read the ISA. Unfortunately
-  //   most of those require that the code is running in ring 0 /
-  //   protected-mode.
-  //
-  //   There are several examples. e.g. Valgrind detects PPC ISA 2.07:
-  //   https://github.com/lu-zero/valgrind/blob/master/none/tests/ppc64/test_isa_2_07_part1.c
-  //
-  //   MRS <Xt>, ID_AA64ISAR0_EL1 ; Read ID_AA64ISAR0_EL1 into Xt
-  //
-  //   uint64_t val;
-  //   __asm __volatile("mrs %0, id_aa64isar0_el1" :"=&r" (val));
-  //
-  // * Use a CPUID-style heuristic database.
-  //
-  // * On Apple (__APPLE__), AES is available on Arm v8.
-  //   https://stackoverflow.com/questions/45637888/how-to-determine-armv8-features-at-runtime-on-ios
-}
-
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/randen_detect.h b/third_party/abseil/absl/random/internal/randen_detect.h
deleted file mode 100644
index f283f43..0000000
--- a/third_party/abseil/absl/random/internal/randen_detect.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_DETECT_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_DETECT_H_
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Returns whether the current CPU supports RandenHwAes implementation.
-// This typically involves supporting cryptographic extensions on whichever
-// platform is currently running.
-bool CPUSupportsRandenHwAes();
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_DETECT_H_
diff --git a/third_party/abseil/absl/random/internal/randen_engine.h b/third_party/abseil/absl/random/internal/randen_engine.h
deleted file mode 100644
index 6b33731..0000000
--- a/third_party/abseil/absl/random/internal/randen_engine.h
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_ENGINE_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_ENGINE_H_
-
-#include <algorithm>
-#include <cinttypes>
-#include <cstdlib>
-#include <iostream>
-#include <iterator>
-#include <limits>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/iostream_state_saver.h"
-#include "absl/random/internal/randen.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Deterministic pseudorandom byte generator with backtracking resistance
-// (leaking the state does not compromise prior outputs). Based on Reverie
-// (see "A Robust and Sponge-Like PRNG with Improved Efficiency") instantiated
-// with an improved Simpira-like permutation.
-// Returns values of type "T" (must be a built-in unsigned integer type).
-//
-// RANDen = RANDom generator or beetroots in Swiss High German.
-// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
-// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
-template <typename T>
-class alignas(16) randen_engine {
- public:
-  // C++11 URBG interface:
-  using result_type = T;
-  static_assert(std::is_unsigned<result_type>::value,
-                "randen_engine template argument must be a built-in unsigned "
-                "integer type");
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  explicit randen_engine(result_type seed_value = 0) { seed(seed_value); }
-
-  template <class SeedSequence,
-            typename = typename absl::enable_if_t<
-                !std::is_same<SeedSequence, randen_engine>::value>>
-  explicit randen_engine(SeedSequence&& seq) {
-    seed(seq);
-  }
-
-  randen_engine(const randen_engine&) = default;
-
-  // Returns random bits from the buffer in units of result_type.
-  result_type operator()() {
-    // Refill the buffer if needed (unlikely).
-    if (next_ >= kStateSizeT) {
-      next_ = kCapacityT;
-      impl_.Generate(state_);
-    }
-
-    return state_[next_++];
-  }
-
-  template <class SeedSequence>
-  typename absl::enable_if_t<
-      !std::is_convertible<SeedSequence, result_type>::value>
-  seed(SeedSequence&& seq) {
-    // Zeroes the state.
-    seed();
-    reseed(seq);
-  }
-
-  void seed(result_type seed_value = 0) {
-    next_ = kStateSizeT;
-    // Zeroes the inner state and fills the outer state with seed_value to
-    // mimics behaviour of reseed
-    std::fill(std::begin(state_), std::begin(state_) + kCapacityT, 0);
-    std::fill(std::begin(state_) + kCapacityT, std::end(state_), seed_value);
-  }
-
-  // Inserts entropy into (part of) the state. Calling this periodically with
-  // sufficient entropy ensures prediction resistance (attackers cannot predict
-  // future outputs even if state is compromised).
-  template <class SeedSequence>
-  void reseed(SeedSequence& seq) {
-    using sequence_result_type = typename SeedSequence::result_type;
-    static_assert(sizeof(sequence_result_type) == 4,
-                  "SeedSequence::result_type must be 32-bit");
-
-    constexpr size_t kBufferSize =
-        Randen::kSeedBytes / sizeof(sequence_result_type);
-    alignas(16) sequence_result_type buffer[kBufferSize];
-
-    // Randen::Absorb XORs the seed into state, which is then mixed by a call
-    // to Randen::Generate. Seeding with only the provided entropy is preferred
-    // to using an arbitrary generate() call, so use [rand.req.seed_seq]
-    // size as a proxy for the number of entropy units that can be generated
-    // without relying on seed sequence mixing...
-    const size_t entropy_size = seq.size();
-    if (entropy_size < kBufferSize) {
-      // ... and only request that many values, or 256-bits, when unspecified.
-      const size_t requested_entropy = (entropy_size == 0) ? 8u : entropy_size;
-      std::fill(std::begin(buffer) + requested_entropy, std::end(buffer), 0);
-      seq.generate(std::begin(buffer), std::begin(buffer) + requested_entropy);
-      // The Randen paper suggests preferentially initializing even-numbered
-      // 128-bit vectors of the randen state (there are 16 such vectors).
-      // The seed data is merged into the state offset by 128-bits, which
-      // implies prefering seed bytes [16..31, ..., 208..223]. Since the
-      // buffer is 32-bit values, we swap the corresponding buffer positions in
-      // 128-bit chunks.
-      size_t dst = kBufferSize;
-      while (dst > 7) {
-        // leave the odd bucket as-is.
-        dst -= 4;
-        size_t src = dst >> 1;
-        // swap 128-bits into the even bucket
-        std::swap(buffer[--dst], buffer[--src]);
-        std::swap(buffer[--dst], buffer[--src]);
-        std::swap(buffer[--dst], buffer[--src]);
-        std::swap(buffer[--dst], buffer[--src]);
-      }
-    } else {
-      seq.generate(std::begin(buffer), std::end(buffer));
-    }
-    impl_.Absorb(buffer, state_);
-
-    // Generate will be called when operator() is called
-    next_ = kStateSizeT;
-  }
-
-  void discard(uint64_t count) {
-    uint64_t step = std::min<uint64_t>(kStateSizeT - next_, count);
-    count -= step;
-
-    constexpr uint64_t kRateT = kStateSizeT - kCapacityT;
-    while (count > 0) {
-      next_ = kCapacityT;
-      impl_.Generate(state_);
-      step = std::min<uint64_t>(kRateT, count);
-      count -= step;
-    }
-    next_ += step;
-  }
-
-  bool operator==(const randen_engine& other) const {
-    return next_ == other.next_ &&
-           std::equal(std::begin(state_), std::end(state_),
-                      std::begin(other.state_));
-  }
-
-  bool operator!=(const randen_engine& other) const {
-    return !(*this == other);
-  }
-
-  template <class CharT, class Traits>
-  friend std::basic_ostream<CharT, Traits>& operator<<(
-      std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-      const randen_engine<T>& engine) {       // NOLINT(runtime/references)
-    using numeric_type =
-        typename random_internal::stream_format_type<result_type>::type;
-    auto saver = random_internal::make_ostream_state_saver(os);
-    for (const auto& elem : engine.state_) {
-      // In the case that `elem` is `uint8_t`, it must be cast to something
-      // larger so that it prints as an integer rather than a character. For
-      // simplicity, apply the cast all circumstances.
-      os << static_cast<numeric_type>(elem) << os.fill();
-    }
-    os << engine.next_;
-    return os;
-  }
-
-  template <class CharT, class Traits>
-  friend std::basic_istream<CharT, Traits>& operator>>(
-      std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-      randen_engine<T>& engine) {             // NOLINT(runtime/references)
-    using numeric_type =
-        typename random_internal::stream_format_type<result_type>::type;
-    result_type state[kStateSizeT];
-    size_t next;
-    for (auto& elem : state) {
-      // It is not possible to read uint8_t from wide streams, so it is
-      // necessary to read a wider type and then cast it to uint8_t.
-      numeric_type value;
-      is >> value;
-      elem = static_cast<result_type>(value);
-    }
-    is >> next;
-    if (is.fail()) {
-      return is;
-    }
-    std::memcpy(engine.state_, state, sizeof(engine.state_));
-    engine.next_ = next;
-    return is;
-  }
-
- private:
-  static constexpr size_t kStateSizeT =
-      Randen::kStateBytes / sizeof(result_type);
-  static constexpr size_t kCapacityT =
-      Randen::kCapacityBytes / sizeof(result_type);
-
-  // First kCapacityT are `inner', the others are accessible random bits.
-  alignas(16) result_type state_[kStateSizeT];
-  size_t next_;  // index within state_
-  Randen impl_;
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_ENGINE_H_
diff --git a/third_party/abseil/absl/random/internal/randen_engine_test.cc b/third_party/abseil/absl/random/internal/randen_engine_test.cc
deleted file mode 100644
index c8e7685..0000000
--- a/third_party/abseil/absl/random/internal/randen_engine_test.cc
+++ /dev/null
@@ -1,656 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen_engine.h"
-
-#include <algorithm>
-#include <bitset>
-#include <random>
-#include <sstream>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/explicit_seed_seq.h"
-#include "absl/strings/str_cat.h"
-#include "absl/time/clock.h"
-
-#define UPDATE_GOLDEN 0
-
-using randen_u64 = absl::random_internal::randen_engine<uint64_t>;
-using randen_u32 = absl::random_internal::randen_engine<uint32_t>;
-using absl::random_internal::ExplicitSeedSeq;
-
-namespace {
-
-template <typename UIntType>
-class RandenEngineTypedTest : public ::testing::Test {};
-
-using UIntTypes = ::testing::Types<uint8_t, uint16_t, uint32_t, uint64_t>;
-
-TYPED_TEST_SUITE(RandenEngineTypedTest, UIntTypes);
-
-TYPED_TEST(RandenEngineTypedTest, VerifyReseedChangesAllValues) {
-  using randen = typename absl::random_internal::randen_engine<TypeParam>;
-  using result_type = typename randen::result_type;
-
-  const size_t kNumOutputs = (sizeof(randen) * 2 / sizeof(TypeParam)) + 1;
-  randen engine;
-
-  // MSVC emits error 2719 without the use of std::ref below.
-  //  * formal parameter with __declspec(align('#')) won't be aligned
-
-  {
-    std::seed_seq seq1{1, 2, 3, 4, 5, 6, 7};
-    engine.seed(seq1);
-  }
-  result_type a[kNumOutputs];
-  std::generate(std::begin(a), std::end(a), std::ref(engine));
-
-  {
-    std::random_device rd;
-    std::seed_seq seq2{rd(), rd(), rd()};
-    engine.seed(seq2);
-  }
-  result_type b[kNumOutputs];
-  std::generate(std::begin(b), std::end(b), std::ref(engine));
-
-  // Test that generated sequence changed as sequence of bits, i.e. if about
-  // half of the bites were flipped between two non-correlated values.
-  size_t changed_bits = 0;
-  size_t unchanged_bits = 0;
-  size_t total_set = 0;
-  size_t total_bits = 0;
-  size_t equal_count = 0;
-  for (size_t i = 0; i < kNumOutputs; ++i) {
-    equal_count += (a[i] == b[i]) ? 1 : 0;
-    std::bitset<sizeof(result_type) * 8> bitset(a[i] ^ b[i]);
-    changed_bits += bitset.count();
-    unchanged_bits += bitset.size() - bitset.count();
-
-    std::bitset<sizeof(result_type) * 8> a_set(a[i]);
-    std::bitset<sizeof(result_type) * 8> b_set(b[i]);
-    total_set += a_set.count() + b_set.count();
-    total_bits += 2 * 8 * sizeof(result_type);
-  }
-  // On average, half the bits are changed between two calls.
-  EXPECT_LE(changed_bits, 0.60 * (changed_bits + unchanged_bits));
-  EXPECT_GE(changed_bits, 0.40 * (changed_bits + unchanged_bits));
-
-  // Verify using a quick normal-approximation to the binomial.
-  EXPECT_NEAR(total_set, total_bits * 0.5, 4 * std::sqrt(total_bits))
-      << "@" << total_set / static_cast<double>(total_bits);
-
-  // Also, A[i] == B[i] with probability (1/range) * N.
-  // Give this a pretty wide latitude, though.
-  const double kExpected = kNumOutputs / (1.0 * sizeof(result_type) * 8);
-  EXPECT_LE(equal_count, 1.0 + kExpected);
-}
-
-// Number of values that needs to be consumed to clean two sizes of buffer
-// and trigger third refresh. (slightly overestimates the actual state size).
-constexpr size_t kTwoBufferValues = sizeof(randen_u64) / sizeof(uint16_t) + 1;
-
-TYPED_TEST(RandenEngineTypedTest, VerifyDiscard) {
-  using randen = typename absl::random_internal::randen_engine<TypeParam>;
-
-  for (size_t num_used = 0; num_used < kTwoBufferValues; ++num_used) {
-    randen engine_used;
-    for (size_t i = 0; i < num_used; ++i) {
-      engine_used();
-    }
-
-    for (size_t num_discard = 0; num_discard < kTwoBufferValues;
-         ++num_discard) {
-      randen engine1 = engine_used;
-      randen engine2 = engine_used;
-      for (size_t i = 0; i < num_discard; ++i) {
-        engine1();
-      }
-      engine2.discard(num_discard);
-      for (size_t i = 0; i < kTwoBufferValues; ++i) {
-        const auto r1 = engine1();
-        const auto r2 = engine2();
-        ASSERT_EQ(r1, r2) << "used=" << num_used << " discard=" << num_discard;
-      }
-    }
-  }
-}
-
-TYPED_TEST(RandenEngineTypedTest, StreamOperatorsResult) {
-  using randen = typename absl::random_internal::randen_engine<TypeParam>;
-  std::wostringstream os;
-  std::wistringstream is;
-  randen engine;
-
-  EXPECT_EQ(&(os << engine), &os);
-  EXPECT_EQ(&(is >> engine), &is);
-}
-
-TYPED_TEST(RandenEngineTypedTest, StreamSerialization) {
-  using randen = typename absl::random_internal::randen_engine<TypeParam>;
-
-  for (size_t discard = 0; discard < kTwoBufferValues; ++discard) {
-    ExplicitSeedSeq seed_sequence{12, 34, 56};
-    randen engine(seed_sequence);
-    engine.discard(discard);
-
-    std::stringstream stream;
-    stream << engine;
-
-    randen new_engine;
-    stream >> new_engine;
-    for (size_t i = 0; i < 64; ++i) {
-      EXPECT_EQ(engine(), new_engine()) << " " << i;
-    }
-  }
-}
-
-constexpr size_t kNumGoldenOutputs = 127;
-
-// This test is checking if randen_engine is meets interface requirements
-// defined in [rand.req.urbg].
-TYPED_TEST(RandenEngineTypedTest, RandomNumberEngineInterface) {
-  using randen = typename absl::random_internal::randen_engine<TypeParam>;
-
-  using E = randen;
-  using T = typename E::result_type;
-
-  static_assert(std::is_copy_constructible<E>::value,
-                "randen_engine must be copy constructible");
-
-  static_assert(absl::is_copy_assignable<E>::value,
-                "randen_engine must be copy assignable");
-
-  static_assert(std::is_move_constructible<E>::value,
-                "randen_engine must be move constructible");
-
-  static_assert(absl::is_move_assignable<E>::value,
-                "randen_engine must be move assignable");
-
-  static_assert(std::is_same<decltype(std::declval<E>()()), T>::value,
-                "return type of operator() must be result_type");
-
-  // Names after definition of [rand.req.urbg] in C++ standard.
-  // e us a value of E
-  // v is a lvalue of E
-  // x, y are possibly const values of E
-  // s is a value of T
-  // q is a value satisfying requirements of seed_sequence
-  // z is a value of type unsigned long long
-  // os is a some specialization of basic_ostream
-  // is is a some specialization of basic_istream
-
-  E e, v;
-  const E x, y;
-  T s = 1;
-  std::seed_seq q{1, 2, 3};
-  unsigned long long z = 1;  // NOLINT(runtime/int)
-  std::wostringstream os;
-  std::wistringstream is;
-
-  E{};
-  E{x};
-  E{s};
-  E{q};
-
-  e.seed();
-
-  // MSVC emits error 2718 when using EXPECT_EQ(e, x)
-  //  * actual parameter with __declspec(align('#')) won't be aligned
-  EXPECT_TRUE(e == x);
-
-  e.seed(q);
-  {
-    E tmp(q);
-    EXPECT_TRUE(e == tmp);
-  }
-
-  e();
-  {
-    E tmp(q);
-    EXPECT_TRUE(e != tmp);
-  }
-
-  e.discard(z);
-
-  static_assert(std::is_same<decltype(x == y), bool>::value,
-                "return type of operator== must be bool");
-
-  static_assert(std::is_same<decltype(x != y), bool>::value,
-                "return type of operator== must be bool");
-}
-
-TYPED_TEST(RandenEngineTypedTest, RandenEngineSFINAETest) {
-  using randen = typename absl::random_internal::randen_engine<TypeParam>;
-  using result_type = typename randen::result_type;
-
-  {
-    randen engine(result_type(1));
-    engine.seed(result_type(1));
-  }
-
-  {
-    result_type n = 1;
-    randen engine(n);
-    engine.seed(n);
-  }
-
-  {
-    randen engine(1);
-    engine.seed(1);
-  }
-
-  {
-    int n = 1;
-    randen engine(n);
-    engine.seed(n);
-  }
-
-  {
-    std::seed_seq seed_seq;
-    randen engine(seed_seq);
-    engine.seed(seed_seq);
-  }
-
-  {
-    randen engine{std::seed_seq()};
-    engine.seed(std::seed_seq());
-  }
-}
-
-TEST(RandenTest, VerifyGoldenRanden64Default) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0xc3c14f134e433977, 0xdda9f47cd90410ee, 0x887bf3087fd8ca10,
-      0xf0b780f545c72912, 0x15dbb1d37696599f, 0x30ec63baff3c6d59,
-      0xb29f73606f7f20a6, 0x02808a316f49a54c, 0x3b8feaf9d5c8e50e,
-      0x9cbf605e3fd9de8a, 0xc970ae1a78183bbb, 0xd8b2ffd356301ed5,
-      0xf4b327fe0fc73c37, 0xcdfd8d76eb8f9a19, 0xc3a506eb91420c9d,
-      0xd5af05dd3eff9556, 0x48db1bb78f83c4a1, 0x7023920e0d6bfe8c,
-      0x58d3575834956d42, 0xed1ef4c26b87b840, 0x8eef32a23e0b2df3,
-      0x497cabf3431154fc, 0x4e24370570029a8b, 0xd88b5749f090e5ea,
-      0xc651a582a970692f, 0x78fcec2cbb6342f5, 0x463cb745612f55db,
-      0x352ee4ad1816afe3, 0x026ff374c101da7e, 0x811ef0821c3de851,
-      0x6f7e616704c4fa59, 0xa0660379992d58fc, 0x04b0a374a3b795c7,
-      0x915f3445685da798, 0x26802a8ac76571ce, 0x4663352533ce1882,
-      0xb9fdefb4a24dc738, 0x5588ba3a4d6e6c51, 0xa2101a42d35f1956,
-      0x607195a5e200f5fd, 0x7e100308f3290764, 0xe1e5e03c759c0709,
-      0x082572cc5da6606f, 0xcbcf585399e432f1, 0xe8a2be4f8335d8f1,
-      0x0904469acbfee8f2, 0xf08bd31b6daecd51, 0x08e8a1f1a69da69a,
-      0x6542a20aad57bff5, 0x2e9705bb053d6b46, 0xda2fc9db0713c391,
-      0x78e3a810213b6ffb, 0xdc16a59cdd85f8a6, 0xc0932718cd55781f,
-      0xb9bfb29c2b20bfe5, 0xb97289c1be0f2f9c, 0xc0a2a0e403a892d4,
-      0x5524bb834771435b, 0x8265da3d39d1a750, 0xff4af3ab8d1b78c5,
-      0xf0ec5f424bcad77f, 0x66e455f627495189, 0xc82d3120b57e3270,
-      0x3424e47dc22596e3, 0xbc0c95129ccedcdd, 0xc191c595afc4dcbf,
-      0x120392bd2bb70939, 0x7f90650ea6cd6ab4, 0x7287491832695ad3,
-      0xa7c8fac5a7917eb0, 0xd088cb9418be0361, 0x7c1bf9839c7c1ce5,
-      0xe2e991fa58e1e79e, 0x78565cdefd28c4ad, 0x7351b9fef98bafad,
-      0x2a9eac28b08c96bf, 0x6c4f179696cb2225, 0x13a685861bab87e0,
-      0x64c6de5aa0501971, 0x30537425cac70991, 0x01590d9dc6c532b7,
-      0x7e05e3aa8ec720dc, 0x74a07d9c54e3e63f, 0x738184388f3bc1d2,
-      0x26ffdc5067be3acb, 0x6bcdf185561f255f, 0xa0eaf2e1cf99b1c6,
-      0x171df81934f68604, 0x7ea5a21665683e5a, 0x5d1cb02075ba1cea,
-      0x957f38cbd2123fdf, 0xba6364eff80de02f, 0x606e0a0e41d452ee,
-      0x892d8317de82f7a2, 0xe707b1db50f7b43e, 0x4eb28826766fcf5b,
-      0x5a362d56e80a0951, 0x6ee217df16527d78, 0xf6737962ba6b23dd,
-      0x443e63857d4076ca, 0x790d9a5f048adfeb, 0xd796b052151ee94d,
-      0x033ed95c12b04a03, 0x8b833ff84893da5d, 0x3d6724b1bb15eab9,
-      0x9877c4225061ca76, 0xd68d6810adf74fb3, 0x42e5352fe30ce989,
-      0x265b565a7431fde7, 0x3cdbf7e358df4b8b, 0x2922a47f6d3e8779,
-      0x52d2242f65b37f88, 0x5d836d6e2958d6b5, 0x29d40f00566d5e26,
-      0x288db0e1124b14a0, 0x6c056608b7d9c1b6, 0x0b9471bdb8f19d32,
-      0x8fb946504faa6c9d, 0x8943a9464540251c, 0xfd1fe27d144a09e0,
-      0xea6ac458da141bda, 0x8048f217633fce36, 0xfeda1384ade74d31,
-      0x4334b8b02ff7612f, 0xdbc8441f5227e216, 0x096d119a3605c85b,
-      0x2b72b31c21b7d7d0};
-
-  randen_u64 engine;
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%016lx, ", engine());
-    if (i % 3 == 2) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed();
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(RandenTest, VerifyGoldenRanden64Seeded) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0x83a9e58f94d3dcd5, 0x70bbdff3d97949fb, 0x0438481f7471c1b4,
-      0x34fdc58ee5fb5930, 0xceee4f2d2a937d17, 0xb5a26a68e432aea9,
-      0x8b64774a3fb51740, 0xd89ac1fc74249c74, 0x03910d1d23fc3fdf,
-      0xd38f630878aa897f, 0x0ee8f0f5615f7e44, 0x98f5a53df8279d52,
-      0xb403f52c25938d0e, 0x240072996ea6e838, 0xd3a791246190fa61,
-      0xaaedd3df7a7b4f80, 0xc6eacabe05deaf6e, 0xb7967dd8790edf4d,
-      0x9a0a8e67e049d279, 0x0494f606aebc23e7, 0x598dcd687bc3e0ee,
-      0x010ac81802d452a1, 0x6407c87160aa2842, 0x5a56e276486f93a0,
-      0xc887a399d46a8f02, 0x9e1e6100fe93b740, 0x12d02e330f8901f6,
-      0xc39ca52b47e790b7, 0xb0b0a2fa11e82e61, 0x1542d841a303806a,
-      0x1fe659fd7d6e9d86, 0xb8c90d80746541ac, 0x239d56a5669ddc94,
-      0xd40db57c8123d13c, 0x3abc2414153a0db0, 0x9bad665630cb8d61,
-      0x0bd1fb90ee3f4bbc, 0x8f0b4d7e079b4e42, 0xfa0fb0e0ee59e793,
-      0x51080b283e071100, 0x2c4b9e715081cc15, 0xbe10ed49de4941df,
-      0xf8eaac9d4b1b0d37, 0x4bcce4b54605e139, 0xa64722b76765dda6,
-      0xb9377d738ca28ab5, 0x779fad81a8ccc1af, 0x65cb3ee61ffd3ba7,
-      0xd74e79087862836f, 0xd05b9c584c3f25bf, 0x2ba93a4693579827,
-      0xd81530aff05420ce, 0xec06cea215478621, 0x4b1798a6796d65ad,
-      0xf142f3fb3a6f6fa6, 0x002b7bf7e237b560, 0xf47f2605ef65b4f8,
-      0x9804ec5517effc18, 0xaed3d7f8b7d481cd, 0x5651c24c1ce338d1,
-      0x3e7a38208bf0a3c6, 0x6796a7b614534aed, 0x0d0f3b848358460f,
-      0x0fa5fe7600b19524, 0x2b0cf38253faaedc, 0x10df9188233a9fd6,
-      0x3a10033880138b59, 0x5fb0b0d23948e80f, 0x9e76f7b02fbf5350,
-      0x0816052304b1a985, 0x30c9880db41fd218, 0x14aa399b65e20f28,
-      0xe1454a8cace787b4, 0x325ac971b6c6f0f5, 0x716b1aa2784f3d36,
-      0x3d5ce14accfd144f, 0x6c0c97710f651792, 0xbc5b0f59fb333532,
-      0x2a90a7d2140470bc, 0x8da269f55c1e1c8d, 0xcfc37143895792ca,
-      0xbe21eab1f30b238f, 0x8c47229dee4d65fd, 0x5743614ed1ed7d54,
-      0x351372a99e9c476e, 0x2bd5ea15e5db085f, 0x6925fde46e0af4ca,
-      0xed3eda2bdc1f45bd, 0xdef68c68d460fa6e, 0xe42a0de76253e2b5,
-      0x4e5176dcbc29c305, 0xbfd85fba9f810f6e, 0x76a5a2a9beb815c6,
-      0x01edc4ddceaf414c, 0xa4e98904b4bb3b4b, 0x00bd63ac7d2f1ddd,
-      0xb8491fe6e998ddbb, 0xb386a3463dda6800, 0x0081887688871619,
-      0x33d394b3344e9a38, 0x815dba65a3a8baf9, 0x4232f6ec02c2fd1a,
-      0xb5cff603edd20834, 0x580189243f687663, 0xa8d5a2cbdc27fe99,
-      0x725d881693fa0131, 0xa2be2c13db2c7ac5, 0x7b6a9614b509fd78,
-      0xb6b136d71e717636, 0x660f1a71aff046ea, 0x0ba10ae346c8ec9e,
-      0xe66dde53e3145b41, 0x3b18288c88c26be6, 0x4d9d9d2ff02db933,
-      0x4167da8c70f46e8a, 0xf183beef8c6318b4, 0x4d889e1e71eeeef1,
-      0x7175c71ad6689b6b, 0xfb9e42beacd1b7dd, 0xc33d0e91b29b5e0d,
-      0xd39b83291ce47922, 0xc4d570fb8493d12e, 0x23d5a5724f424ae6,
-      0x5245f161876b6616, 0x38d77dbd21ab578d, 0x9c3423311f4ecbfe,
-      0x76fe31389bacd9d5,
-  };
-
-  ExplicitSeedSeq seed_sequence{12, 34, 56};
-  randen_u64 engine(seed_sequence);
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%016lx, ", engine());
-    if (i % 3 == 2) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed(seed_sequence);
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(RandenTest, VerifyGoldenRanden32Default) {
-  constexpr uint64_t kGolden[2 * kNumGoldenOutputs] = {
-      0x4e433977, 0xc3c14f13, 0xd90410ee, 0xdda9f47c, 0x7fd8ca10, 0x887bf308,
-      0x45c72912, 0xf0b780f5, 0x7696599f, 0x15dbb1d3, 0xff3c6d59, 0x30ec63ba,
-      0x6f7f20a6, 0xb29f7360, 0x6f49a54c, 0x02808a31, 0xd5c8e50e, 0x3b8feaf9,
-      0x3fd9de8a, 0x9cbf605e, 0x78183bbb, 0xc970ae1a, 0x56301ed5, 0xd8b2ffd3,
-      0x0fc73c37, 0xf4b327fe, 0xeb8f9a19, 0xcdfd8d76, 0x91420c9d, 0xc3a506eb,
-      0x3eff9556, 0xd5af05dd, 0x8f83c4a1, 0x48db1bb7, 0x0d6bfe8c, 0x7023920e,
-      0x34956d42, 0x58d35758, 0x6b87b840, 0xed1ef4c2, 0x3e0b2df3, 0x8eef32a2,
-      0x431154fc, 0x497cabf3, 0x70029a8b, 0x4e243705, 0xf090e5ea, 0xd88b5749,
-      0xa970692f, 0xc651a582, 0xbb6342f5, 0x78fcec2c, 0x612f55db, 0x463cb745,
-      0x1816afe3, 0x352ee4ad, 0xc101da7e, 0x026ff374, 0x1c3de851, 0x811ef082,
-      0x04c4fa59, 0x6f7e6167, 0x992d58fc, 0xa0660379, 0xa3b795c7, 0x04b0a374,
-      0x685da798, 0x915f3445, 0xc76571ce, 0x26802a8a, 0x33ce1882, 0x46633525,
-      0xa24dc738, 0xb9fdefb4, 0x4d6e6c51, 0x5588ba3a, 0xd35f1956, 0xa2101a42,
-      0xe200f5fd, 0x607195a5, 0xf3290764, 0x7e100308, 0x759c0709, 0xe1e5e03c,
-      0x5da6606f, 0x082572cc, 0x99e432f1, 0xcbcf5853, 0x8335d8f1, 0xe8a2be4f,
-      0xcbfee8f2, 0x0904469a, 0x6daecd51, 0xf08bd31b, 0xa69da69a, 0x08e8a1f1,
-      0xad57bff5, 0x6542a20a, 0x053d6b46, 0x2e9705bb, 0x0713c391, 0xda2fc9db,
-      0x213b6ffb, 0x78e3a810, 0xdd85f8a6, 0xdc16a59c, 0xcd55781f, 0xc0932718,
-      0x2b20bfe5, 0xb9bfb29c, 0xbe0f2f9c, 0xb97289c1, 0x03a892d4, 0xc0a2a0e4,
-      0x4771435b, 0x5524bb83, 0x39d1a750, 0x8265da3d, 0x8d1b78c5, 0xff4af3ab,
-      0x4bcad77f, 0xf0ec5f42, 0x27495189, 0x66e455f6, 0xb57e3270, 0xc82d3120,
-      0xc22596e3, 0x3424e47d, 0x9ccedcdd, 0xbc0c9512, 0xafc4dcbf, 0xc191c595,
-      0x2bb70939, 0x120392bd, 0xa6cd6ab4, 0x7f90650e, 0x32695ad3, 0x72874918,
-      0xa7917eb0, 0xa7c8fac5, 0x18be0361, 0xd088cb94, 0x9c7c1ce5, 0x7c1bf983,
-      0x58e1e79e, 0xe2e991fa, 0xfd28c4ad, 0x78565cde, 0xf98bafad, 0x7351b9fe,
-      0xb08c96bf, 0x2a9eac28, 0x96cb2225, 0x6c4f1796, 0x1bab87e0, 0x13a68586,
-      0xa0501971, 0x64c6de5a, 0xcac70991, 0x30537425, 0xc6c532b7, 0x01590d9d,
-      0x8ec720dc, 0x7e05e3aa, 0x54e3e63f, 0x74a07d9c, 0x8f3bc1d2, 0x73818438,
-      0x67be3acb, 0x26ffdc50, 0x561f255f, 0x6bcdf185, 0xcf99b1c6, 0xa0eaf2e1,
-      0x34f68604, 0x171df819, 0x65683e5a, 0x7ea5a216, 0x75ba1cea, 0x5d1cb020,
-      0xd2123fdf, 0x957f38cb, 0xf80de02f, 0xba6364ef, 0x41d452ee, 0x606e0a0e,
-      0xde82f7a2, 0x892d8317, 0x50f7b43e, 0xe707b1db, 0x766fcf5b, 0x4eb28826,
-      0xe80a0951, 0x5a362d56, 0x16527d78, 0x6ee217df, 0xba6b23dd, 0xf6737962,
-      0x7d4076ca, 0x443e6385, 0x048adfeb, 0x790d9a5f, 0x151ee94d, 0xd796b052,
-      0x12b04a03, 0x033ed95c, 0x4893da5d, 0x8b833ff8, 0xbb15eab9, 0x3d6724b1,
-      0x5061ca76, 0x9877c422, 0xadf74fb3, 0xd68d6810, 0xe30ce989, 0x42e5352f,
-      0x7431fde7, 0x265b565a, 0x58df4b8b, 0x3cdbf7e3, 0x6d3e8779, 0x2922a47f,
-      0x65b37f88, 0x52d2242f, 0x2958d6b5, 0x5d836d6e, 0x566d5e26, 0x29d40f00,
-      0x124b14a0, 0x288db0e1, 0xb7d9c1b6, 0x6c056608, 0xb8f19d32, 0x0b9471bd,
-      0x4faa6c9d, 0x8fb94650, 0x4540251c, 0x8943a946, 0x144a09e0, 0xfd1fe27d,
-      0xda141bda, 0xea6ac458, 0x633fce36, 0x8048f217, 0xade74d31, 0xfeda1384,
-      0x2ff7612f, 0x4334b8b0, 0x5227e216, 0xdbc8441f, 0x3605c85b, 0x096d119a,
-      0x21b7d7d0, 0x2b72b31c};
-
-  randen_u32 engine;
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < 2 * kNumGoldenOutputs; ++i) {
-    printf("0x%08x, ", engine());
-    if (i % 6 == 5) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed();
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(RandenTest, VerifyGoldenRanden32Seeded) {
-  constexpr uint64_t kGolden[2 * kNumGoldenOutputs] = {
-      0x94d3dcd5, 0x83a9e58f, 0xd97949fb, 0x70bbdff3, 0x7471c1b4, 0x0438481f,
-      0xe5fb5930, 0x34fdc58e, 0x2a937d17, 0xceee4f2d, 0xe432aea9, 0xb5a26a68,
-      0x3fb51740, 0x8b64774a, 0x74249c74, 0xd89ac1fc, 0x23fc3fdf, 0x03910d1d,
-      0x78aa897f, 0xd38f6308, 0x615f7e44, 0x0ee8f0f5, 0xf8279d52, 0x98f5a53d,
-      0x25938d0e, 0xb403f52c, 0x6ea6e838, 0x24007299, 0x6190fa61, 0xd3a79124,
-      0x7a7b4f80, 0xaaedd3df, 0x05deaf6e, 0xc6eacabe, 0x790edf4d, 0xb7967dd8,
-      0xe049d279, 0x9a0a8e67, 0xaebc23e7, 0x0494f606, 0x7bc3e0ee, 0x598dcd68,
-      0x02d452a1, 0x010ac818, 0x60aa2842, 0x6407c871, 0x486f93a0, 0x5a56e276,
-      0xd46a8f02, 0xc887a399, 0xfe93b740, 0x9e1e6100, 0x0f8901f6, 0x12d02e33,
-      0x47e790b7, 0xc39ca52b, 0x11e82e61, 0xb0b0a2fa, 0xa303806a, 0x1542d841,
-      0x7d6e9d86, 0x1fe659fd, 0x746541ac, 0xb8c90d80, 0x669ddc94, 0x239d56a5,
-      0x8123d13c, 0xd40db57c, 0x153a0db0, 0x3abc2414, 0x30cb8d61, 0x9bad6656,
-      0xee3f4bbc, 0x0bd1fb90, 0x079b4e42, 0x8f0b4d7e, 0xee59e793, 0xfa0fb0e0,
-      0x3e071100, 0x51080b28, 0x5081cc15, 0x2c4b9e71, 0xde4941df, 0xbe10ed49,
-      0x4b1b0d37, 0xf8eaac9d, 0x4605e139, 0x4bcce4b5, 0x6765dda6, 0xa64722b7,
-      0x8ca28ab5, 0xb9377d73, 0xa8ccc1af, 0x779fad81, 0x1ffd3ba7, 0x65cb3ee6,
-      0x7862836f, 0xd74e7908, 0x4c3f25bf, 0xd05b9c58, 0x93579827, 0x2ba93a46,
-      0xf05420ce, 0xd81530af, 0x15478621, 0xec06cea2, 0x796d65ad, 0x4b1798a6,
-      0x3a6f6fa6, 0xf142f3fb, 0xe237b560, 0x002b7bf7, 0xef65b4f8, 0xf47f2605,
-      0x17effc18, 0x9804ec55, 0xb7d481cd, 0xaed3d7f8, 0x1ce338d1, 0x5651c24c,
-      0x8bf0a3c6, 0x3e7a3820, 0x14534aed, 0x6796a7b6, 0x8358460f, 0x0d0f3b84,
-      0x00b19524, 0x0fa5fe76, 0x53faaedc, 0x2b0cf382, 0x233a9fd6, 0x10df9188,
-      0x80138b59, 0x3a100338, 0x3948e80f, 0x5fb0b0d2, 0x2fbf5350, 0x9e76f7b0,
-      0x04b1a985, 0x08160523, 0xb41fd218, 0x30c9880d, 0x65e20f28, 0x14aa399b,
-      0xace787b4, 0xe1454a8c, 0xb6c6f0f5, 0x325ac971, 0x784f3d36, 0x716b1aa2,
-      0xccfd144f, 0x3d5ce14a, 0x0f651792, 0x6c0c9771, 0xfb333532, 0xbc5b0f59,
-      0x140470bc, 0x2a90a7d2, 0x5c1e1c8d, 0x8da269f5, 0x895792ca, 0xcfc37143,
-      0xf30b238f, 0xbe21eab1, 0xee4d65fd, 0x8c47229d, 0xd1ed7d54, 0x5743614e,
-      0x9e9c476e, 0x351372a9, 0xe5db085f, 0x2bd5ea15, 0x6e0af4ca, 0x6925fde4,
-      0xdc1f45bd, 0xed3eda2b, 0xd460fa6e, 0xdef68c68, 0x6253e2b5, 0xe42a0de7,
-      0xbc29c305, 0x4e5176dc, 0x9f810f6e, 0xbfd85fba, 0xbeb815c6, 0x76a5a2a9,
-      0xceaf414c, 0x01edc4dd, 0xb4bb3b4b, 0xa4e98904, 0x7d2f1ddd, 0x00bd63ac,
-      0xe998ddbb, 0xb8491fe6, 0x3dda6800, 0xb386a346, 0x88871619, 0x00818876,
-      0x344e9a38, 0x33d394b3, 0xa3a8baf9, 0x815dba65, 0x02c2fd1a, 0x4232f6ec,
-      0xedd20834, 0xb5cff603, 0x3f687663, 0x58018924, 0xdc27fe99, 0xa8d5a2cb,
-      0x93fa0131, 0x725d8816, 0xdb2c7ac5, 0xa2be2c13, 0xb509fd78, 0x7b6a9614,
-      0x1e717636, 0xb6b136d7, 0xaff046ea, 0x660f1a71, 0x46c8ec9e, 0x0ba10ae3,
-      0xe3145b41, 0xe66dde53, 0x88c26be6, 0x3b18288c, 0xf02db933, 0x4d9d9d2f,
-      0x70f46e8a, 0x4167da8c, 0x8c6318b4, 0xf183beef, 0x71eeeef1, 0x4d889e1e,
-      0xd6689b6b, 0x7175c71a, 0xacd1b7dd, 0xfb9e42be, 0xb29b5e0d, 0xc33d0e91,
-      0x1ce47922, 0xd39b8329, 0x8493d12e, 0xc4d570fb, 0x4f424ae6, 0x23d5a572,
-      0x876b6616, 0x5245f161, 0x21ab578d, 0x38d77dbd, 0x1f4ecbfe, 0x9c342331,
-      0x9bacd9d5, 0x76fe3138,
-  };
-
-  ExplicitSeedSeq seed_sequence{12, 34, 56};
-  randen_u32 engine(seed_sequence);
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  for (size_t i = 0; i < 2 * kNumGoldenOutputs; ++i) {
-    printf("0x%08x, ", engine());
-    if (i % 6 == 5) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-  engine.seed(seed_sequence);
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(RandenTest, VerifyGoldenFromDeserializedEngine) {
-  constexpr uint64_t kGolden[kNumGoldenOutputs] = {
-      0x067f9f9ab919657a, 0x0534605912988583, 0x8a303f72feaa673f,
-      0x77b7fd747909185c, 0xd9af90403c56d891, 0xd939c6cb204d14b5,
-      0x7fbe6b954a47b483, 0x8b31a47cc34c768d, 0x3a9e546da2701a9c,
-      0x5246539046253e71, 0x417191ffb2a848a1, 0x7b1c7bf5a5001d09,
-      0x9489b15d194f2361, 0xfcebdeea3bcd2461, 0xd643027c854cec97,
-      0x5885397f91e0d21c, 0x53173b0efae30d58, 0x1c9c71168449fac1,
-      0xe358202b711ed8aa, 0x94e3918ed1d8227c, 0x5bb4e251450144cf,
-      0xb5c7a519b489af3b, 0x6f8b560b1f7b3469, 0xfde11dd4a1c74eef,
-      0x33383d2f76457dcf, 0x3060c0ec6db9fce1, 0x18f451fcddeec766,
-      0xe73c5d6b9f26da2a, 0x8d4cc566671b32a4, 0xb8189b73776bc9ff,
-      0x497a70f9caf0bc23, 0x23afcc509791dcea, 0x18af70dc4b27d306,
-      0xd3853f955a0ce5b9, 0x441db6c01a0afb17, 0xd0136c3fb8e1f13f,
-      0x5e4fd6fc2f33783c, 0xe0d24548adb5da51, 0x0f4d8362a7d3485a,
-      0x9f572d68270fa563, 0x6351fbc823024393, 0xa66dbfc61810e9ab,
-      0x0ff17fc14b651af8, 0xd74c55dafb99e623, 0x36303bc1ad85c6c2,
-      0x4920cd6a2af7e897, 0x0b8848addc30fecd, 0x9e1562eda6488e93,
-      0x197553807d607828, 0xbef5eaeda5e21235, 0x18d91d2616aca527,
-      0xb7821937f5c873cd, 0x2cd4ae5650dbeefc, 0xb35a64376f75ffdf,
-      0x9226d414d647fe07, 0x663f3db455bbb35e, 0xa829eead6ae93247,
-      0x7fd69c204dd0d25f, 0xbe1411f891c9acb1, 0xd476f34a506d5f11,
-      0xf423d2831649c5ca, 0x1e503962951abd75, 0xeccc9e8b1e34b537,
-      0xb11a147294044854, 0xc4cf27f0abf4929d, 0xe9193abf6fa24c8c,
-      0xa94a259e3aba8808, 0x21dc414197deffa3, 0xa2ae211d1ff622ae,
-      0xfe3995c46be5a4f4, 0xe9984c284bf11128, 0xcb1ce9d2f0851a80,
-      0x42fee17971d87cd8, 0xac76a98d177adc88, 0xa0973b3dedc4af6f,
-      0xdf56d6bbcb1b8e86, 0xf1e6485f407b11c9, 0x2c63de4deccb15c0,
-      0x6fe69db32ed4fad7, 0xaa51a65f84bca1f1, 0x242f2ee81d608afc,
-      0x8eb88b2b69fc153b, 0x22c20098baf73fd1, 0x57759466f576488c,
-      0x075ca562cea1be9d, 0x9a74814d73d28891, 0x73d1555fc02f4d3d,
-      0xc17f8f210ee89337, 0x46cca7999eaeafd4, 0x5db8d6a327a0d8ac,
-      0xb79b4f93c738d7a1, 0x9994512f0036ded1, 0xd3883026f38747f4,
-      0xf31f7458078d097c, 0x736ce4d480680669, 0x7a496f4c7e1033e3,
-      0xecf85bf297fbc68c, 0x9e37e1d0f24f3c4e, 0x15b6e067ca0746fc,
-      0xdd4a39905c5db81c, 0xb5dfafa7bcfdf7da, 0xca6646fb6f92a276,
-      0x1c6b35f363ef0efd, 0x6a33d06037ad9f76, 0x45544241afd8f80f,
-      0x83f8d83f859c90c5, 0x22aea9c5365e8c19, 0xfac35b11f20b6a6a,
-      0xd1acf49d1a27dd2f, 0xf281cd09c4fed405, 0x076000a42cd38e4f,
-      0x6ace300565070445, 0x463a62781bddc4db, 0x1477126b46b569ac,
-      0x127f2bb15035fbb8, 0xdfa30946049c04a8, 0x89072a586ba8dd3e,
-      0x62c809582bb7e74d, 0x22c0c3641406c28b, 0x9b66e36c47ff004d,
-      0xb9cd2c7519653330, 0x18608d79cd7a598d, 0x92c0bd1323e53e32,
-      0x887ff00de8524aa5, 0xa074410b787abd10, 0x18ab41b8057a2063,
-      0x1560abf26bc5f987};
-
-#if UPDATE_GOLDEN
-  (void)kGolden;  // Silence warning.
-  std::seed_seq seed_sequence{1, 2, 3, 4, 5};
-  randen_u64 engine(seed_sequence);
-  std::ostringstream stream;
-  stream << engine;
-  auto str = stream.str();
-  printf("%s\n\n", str.c_str());
-  for (size_t i = 0; i < kNumGoldenOutputs; ++i) {
-    printf("0x%016lx, ", engine());
-    if (i % 3 == 2) {
-      printf("\n");
-    }
-  }
-  printf("\n\n\n");
-#else
-  randen_u64 engine;
-  std::istringstream stream(
-      "0 0 9824501439887287479 3242284395352394785 243836530774933777 "
-      "4047941804708365596 17165468127298385802 949276103645889255 "
-      "10659970394998657921 1657570836810929787 11697746266668051452 "
-      "9967209969299905230 14140390331161524430 7383014124183271684 "
-      "13146719127702337852 13983155220295807171 11121125587542359264 "
-      "195757810993252695 17138580243103178492 11326030747260920501 "
-      "8585097322474965590 18342582839328350995 15052982824209724634 "
-      "7321861343874683609 1806786911778767826 10100850842665572955 "
-      "9249328950653985078 13600624835326909759 11137960060943860251 "
-      "10208781341792329629 9282723971471525577 16373271619486811032 32");
-  stream >> engine;
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, engine());
-  }
-#endif
-}
-
-TEST(RandenTest, IsFastOrSlow) {
-  // randen_engine typically costs ~5ns per value for the optimized code paths,
-  // and the ~1000ns per value for slow code paths.  However when running under
-  // msan, asan, etc. it can take much longer.
-  //
-  // The estimated operation time is something like:
-  //
-  // linux, optimized ~5ns
-  // ppc, optimized ~7ns
-  // nacl (slow), ~1100ns
-  //
-  // `kCount` is chosen below so that, in debug builds and without hardware
-  // acceleration, the test (assuming ~1us per call) should finish in ~0.1s
-  static constexpr size_t kCount = 100000;
-  randen_u64 engine;
-  randen_u64::result_type sum = 0;
-  auto start = absl::GetCurrentTimeNanos();
-  for (int i = 0; i < kCount; i++) {
-    sum += engine();
-  }
-  auto duration = absl::GetCurrentTimeNanos() - start;
-
-  ABSL_INTERNAL_LOG(INFO, absl::StrCat(static_cast<double>(duration) /
-                                           static_cast<double>(kCount),
-                                       "ns"));
-
-  EXPECT_GT(sum, 0);
-  EXPECT_GE(duration, kCount);  // Should be slower than 1ns per call.
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/randen_hwaes.cc b/third_party/abseil/absl/random/internal/randen_hwaes.cc
deleted file mode 100644
index b5a3f90..0000000
--- a/third_party/abseil/absl/random/internal/randen_hwaes.cc
+++ /dev/null
@@ -1,573 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
-// symbols from arbitrary system and other headers, since it may be built
-// with different flags from other targets, using different levels of
-// optimization, potentially introducing ODR violations.
-
-#include "absl/random/internal/randen_hwaes.h"
-
-#include <cstdint>
-#include <cstring>
-
-#include "absl/base/attributes.h"
-#include "absl/random/internal/platform.h"
-#include "absl/random/internal/randen_traits.h"
-
-// ABSL_RANDEN_HWAES_IMPL indicates whether this file will contain
-// a hardware accelerated implementation of randen, or whether it
-// will contain stubs that exit the process.
-#if defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32)
-// The platform.h directives are sufficient to indicate whether
-// we should build accelerated implementations for x86.
-#if (ABSL_HAVE_ACCELERATED_AES || ABSL_RANDOM_INTERNAL_AES_DISPATCH)
-#define ABSL_RANDEN_HWAES_IMPL 1
-#endif
-#elif defined(ABSL_ARCH_PPC)
-// The platform.h directives are sufficient to indicate whether
-// we should build accelerated implementations for PPC.
-//
-// NOTE: This has mostly been tested on 64-bit Power variants,
-// and not embedded cpus such as powerpc32-8540
-#if ABSL_HAVE_ACCELERATED_AES
-#define ABSL_RANDEN_HWAES_IMPL 1
-#endif
-#elif defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64)
-// ARM is somewhat more complicated. We might support crypto natively...
-#if ABSL_HAVE_ACCELERATED_AES || \
-    (defined(__ARM_NEON) && defined(__ARM_FEATURE_CRYPTO))
-#define ABSL_RANDEN_HWAES_IMPL 1
-
-#elif ABSL_RANDOM_INTERNAL_AES_DISPATCH && !defined(__APPLE__) && \
-    (defined(__GNUC__) && __GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 9)
-// ...or, on GCC, we can use an ASM directive to
-// instruct the assember to allow crypto instructions.
-#define ABSL_RANDEN_HWAES_IMPL 1
-#define ABSL_RANDEN_HWAES_IMPL_CRYPTO_DIRECTIVE 1
-#endif
-#else
-// HWAES is unsupported by these architectures / platforms:
-//   __myriad2__
-//   __mips__
-//
-// Other architectures / platforms are unknown.
-//
-// See the Abseil documentation on supported macros at:
-// https://abseil.io/docs/cpp/platforms/macros
-#endif
-
-#if !defined(ABSL_RANDEN_HWAES_IMPL)
-// No accelerated implementation is supported.
-// The RandenHwAes functions are stubs that print an error and exit.
-
-#include <cstdio>
-#include <cstdlib>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// No accelerated implementation.
-bool HasRandenHwAesImplementation() { return false; }
-
-// NOLINTNEXTLINE
-const void* RandenHwAes::GetKeys() {
-  // Attempted to dispatch to an unsupported dispatch target.
-  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH;
-  fprintf(stderr, "AES Hardware detection failed (%d).\n", d);
-  exit(1);
-  return nullptr;
-}
-
-// NOLINTNEXTLINE
-void RandenHwAes::Absorb(const void*, void*) {
-  // Attempted to dispatch to an unsupported dispatch target.
-  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH;
-  fprintf(stderr, "AES Hardware detection failed (%d).\n", d);
-  exit(1);
-}
-
-// NOLINTNEXTLINE
-void RandenHwAes::Generate(const void*, void*) {
-  // Attempted to dispatch to an unsupported dispatch target.
-  const int d = ABSL_RANDOM_INTERNAL_AES_DISPATCH;
-  fprintf(stderr, "AES Hardware detection failed (%d).\n", d);
-  exit(1);
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // defined(ABSL_RANDEN_HWAES_IMPL)
-//
-// Accelerated implementations are supported.
-// We need the per-architecture includes and defines.
-//
-namespace {
-
-using absl::random_internal::RandenTraits;
-
-// Randen operates on 128-bit vectors.
-struct alignas(16) u64x2 {
-  uint64_t data[2];
-};
-
-}  // namespace
-
-// TARGET_CRYPTO defines a crypto attribute for each architecture.
-//
-// NOTE: Evaluate whether we should eliminate ABSL_TARGET_CRYPTO.
-#if (defined(__clang__) || defined(__GNUC__))
-#if defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32)
-#define ABSL_TARGET_CRYPTO __attribute__((target("aes")))
-#elif defined(ABSL_ARCH_PPC)
-#define ABSL_TARGET_CRYPTO __attribute__((target("crypto")))
-#else
-#define ABSL_TARGET_CRYPTO
-#endif
-#else
-#define ABSL_TARGET_CRYPTO
-#endif
-
-#if defined(ABSL_ARCH_PPC)
-// NOTE: Keep in mind that PPC can operate in little-endian or big-endian mode,
-// however the PPC altivec vector registers (and thus the AES instructions)
-// always operate in big-endian mode.
-
-#include <altivec.h>
-// <altivec.h> #defines vector __vector; in C++, this is bad form.
-#undef vector
-#undef bool
-
-// Rely on the PowerPC AltiVec vector operations for accelerated AES
-// instructions. GCC support of the PPC vector types is described in:
-// https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/PowerPC-AltiVec_002fVSX-Built-in-Functions.html
-//
-// Already provides operator^=.
-using Vector128 = __vector unsigned long long;  // NOLINT(runtime/int)
-
-namespace {
-inline ABSL_TARGET_CRYPTO Vector128 ReverseBytes(const Vector128& v) {
-  // Reverses the bytes of the vector.
-  const __vector unsigned char perm = {15, 14, 13, 12, 11, 10, 9, 8,
-                                       7,  6,  5,  4,  3,  2,  1, 0};
-  return vec_perm(v, v, perm);
-}
-
-// WARNING: these load/store in native byte order. It is OK to load and then
-// store an unchanged vector, but interpreting the bits as a number or input
-// to AES will have undefined results.
-inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) {
-  return vec_vsx_ld(0, reinterpret_cast<const Vector128*>(from));
-}
-
-inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) {
-  vec_vsx_st(v, 0, reinterpret_cast<Vector128*>(to));
-}
-
-// One round of AES. "round_key" is a public constant for breaking the
-// symmetry of AES (ensures previously equal columns differ afterwards).
-inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state,
-                                             const Vector128& round_key) {
-  return Vector128(__builtin_crypto_vcipher(state, round_key));
-}
-
-// Enables native loads in the round loop by pre-swapping.
-inline ABSL_TARGET_CRYPTO void SwapEndian(u64x2* state) {
-  for (uint32_t block = 0; block < RandenTraits::kFeistelBlocks; ++block) {
-    Vector128Store(ReverseBytes(Vector128Load(state + block)), state + block);
-  }
-}
-
-}  // namespace
-
-#elif defined(ABSL_ARCH_ARM) || defined(ABSL_ARCH_AARCH64)
-
-// This asm directive will cause the file to be compiled with crypto extensions
-// whether or not the cpu-architecture supports it.
-#if ABSL_RANDEN_HWAES_IMPL_CRYPTO_DIRECTIVE
-asm(".arch_extension  crypto\n");
-
-// Override missing defines.
-#if !defined(__ARM_NEON)
-#define __ARM_NEON 1
-#endif
-
-#if !defined(__ARM_FEATURE_CRYPTO)
-#define __ARM_FEATURE_CRYPTO 1
-#endif
-
-#endif
-
-// Rely on the ARM NEON+Crypto advanced simd types, defined in <arm_neon.h>.
-// uint8x16_t is the user alias for underlying __simd128_uint8_t type.
-// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0073a/IHI0073A_arm_neon_intrinsics_ref.pdf
-//
-// <arm_neon> defines the following
-//
-// typedef __attribute__((neon_vector_type(16))) uint8_t uint8x16_t;
-// typedef __attribute__((neon_vector_type(16))) int8_t int8x16_t;
-// typedef __attribute__((neon_polyvector_type(16))) int8_t poly8x16_t;
-//
-// vld1q_v
-// vst1q_v
-// vaeseq_v
-// vaesmcq_v
-#include <arm_neon.h>
-
-// Already provides operator^=.
-using Vector128 = uint8x16_t;
-
-namespace {
-
-inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) {
-  return vld1q_u8(reinterpret_cast<const uint8_t*>(from));
-}
-
-inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) {
-  vst1q_u8(reinterpret_cast<uint8_t*>(to), v);
-}
-
-// One round of AES. "round_key" is a public constant for breaking the
-// symmetry of AES (ensures previously equal columns differ afterwards).
-inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state,
-                                             const Vector128& round_key) {
-  // It is important to always use the full round function - omitting the
-  // final MixColumns reduces security [https://eprint.iacr.org/2010/041.pdf]
-  // and does not help because we never decrypt.
-  //
-  // Note that ARM divides AES instructions differently than x86 / PPC,
-  // And we need to skip the first AddRoundKey step and add an extra
-  // AddRoundKey step to the end. Lucky for us this is just XOR.
-  return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key;
-}
-
-inline ABSL_TARGET_CRYPTO void SwapEndian(void*) {}
-
-}  // namespace
-
-#elif defined(ABSL_ARCH_X86_64) || defined(ABSL_ARCH_X86_32)
-// On x86 we rely on the aesni instructions
-#include <wmmintrin.h>
-
-namespace {
-
-// Vector128 class is only wrapper for __m128i, benchmark indicates that it's
-// faster than using __m128i directly.
-class Vector128 {
- public:
-  // Convert from/to intrinsics.
-  inline explicit Vector128(const __m128i& Vector128) : data_(Vector128) {}
-
-  inline __m128i data() const { return data_; }
-
-  inline Vector128& operator^=(const Vector128& other) {
-    data_ = _mm_xor_si128(data_, other.data());
-    return *this;
-  }
-
- private:
-  __m128i data_;
-};
-
-inline ABSL_TARGET_CRYPTO Vector128 Vector128Load(const void* from) {
-  return Vector128(_mm_load_si128(reinterpret_cast<const __m128i*>(from)));
-}
-
-inline ABSL_TARGET_CRYPTO void Vector128Store(const Vector128& v, void* to) {
-  _mm_store_si128(reinterpret_cast<__m128i*>(to), v.data());
-}
-
-// One round of AES. "round_key" is a public constant for breaking the
-// symmetry of AES (ensures previously equal columns differ afterwards).
-inline ABSL_TARGET_CRYPTO Vector128 AesRound(const Vector128& state,
-                                             const Vector128& round_key) {
-  // It is important to always use the full round function - omitting the
-  // final MixColumns reduces security [https://eprint.iacr.org/2010/041.pdf]
-  // and does not help because we never decrypt.
-  return Vector128(_mm_aesenc_si128(state.data(), round_key.data()));
-}
-
-inline ABSL_TARGET_CRYPTO void SwapEndian(void*) {}
-
-}  // namespace
-
-#endif
-
-#ifdef __clang__
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wunknown-pragmas"
-#endif
-
-// At this point, all of the platform-specific features have been defined /
-// implemented.
-//
-// REQUIRES: using Vector128 = ...
-// REQUIRES: Vector128 Vector128Load(void*) {...}
-// REQUIRES: void Vector128Store(Vector128, void*) {...}
-// REQUIRES: Vector128 AesRound(Vector128, Vector128) {...}
-// REQUIRES: void SwapEndian(uint64_t*) {...}
-//
-// PROVIDES: absl::random_internal::RandenHwAes::Absorb
-// PROVIDES: absl::random_internal::RandenHwAes::Generate
-namespace {
-
-// Block shuffles applies a shuffle to the entire state between AES rounds.
-// Improved odd-even shuffle from "New criterion for diffusion property".
-inline ABSL_TARGET_CRYPTO void BlockShuffle(u64x2* state) {
-  static_assert(RandenTraits::kFeistelBlocks == 16,
-                "Expecting 16 FeistelBlocks.");
-
-  constexpr size_t shuffle[RandenTraits::kFeistelBlocks] = {
-      7, 2, 13, 4, 11, 8, 3, 6, 15, 0, 9, 10, 1, 14, 5, 12};
-
-  const Vector128 v0 = Vector128Load(state + shuffle[0]);
-  const Vector128 v1 = Vector128Load(state + shuffle[1]);
-  const Vector128 v2 = Vector128Load(state + shuffle[2]);
-  const Vector128 v3 = Vector128Load(state + shuffle[3]);
-  const Vector128 v4 = Vector128Load(state + shuffle[4]);
-  const Vector128 v5 = Vector128Load(state + shuffle[5]);
-  const Vector128 v6 = Vector128Load(state + shuffle[6]);
-  const Vector128 v7 = Vector128Load(state + shuffle[7]);
-  const Vector128 w0 = Vector128Load(state + shuffle[8]);
-  const Vector128 w1 = Vector128Load(state + shuffle[9]);
-  const Vector128 w2 = Vector128Load(state + shuffle[10]);
-  const Vector128 w3 = Vector128Load(state + shuffle[11]);
-  const Vector128 w4 = Vector128Load(state + shuffle[12]);
-  const Vector128 w5 = Vector128Load(state + shuffle[13]);
-  const Vector128 w6 = Vector128Load(state + shuffle[14]);
-  const Vector128 w7 = Vector128Load(state + shuffle[15]);
-
-  Vector128Store(v0, state + 0);
-  Vector128Store(v1, state + 1);
-  Vector128Store(v2, state + 2);
-  Vector128Store(v3, state + 3);
-  Vector128Store(v4, state + 4);
-  Vector128Store(v5, state + 5);
-  Vector128Store(v6, state + 6);
-  Vector128Store(v7, state + 7);
-  Vector128Store(w0, state + 8);
-  Vector128Store(w1, state + 9);
-  Vector128Store(w2, state + 10);
-  Vector128Store(w3, state + 11);
-  Vector128Store(w4, state + 12);
-  Vector128Store(w5, state + 13);
-  Vector128Store(w6, state + 14);
-  Vector128Store(w7, state + 15);
-}
-
-// Feistel round function using two AES subrounds. Very similar to F()
-// from Simpira v2, but with independent subround keys. Uses 17 AES rounds
-// per 16 bytes (vs. 10 for AES-CTR). Computing eight round functions in
-// parallel hides the 7-cycle AESNI latency on HSW. Note that the Feistel
-// XORs are 'free' (included in the second AES instruction).
-inline ABSL_TARGET_CRYPTO const u64x2* FeistelRound(
-    u64x2* state, const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) {
-  static_assert(RandenTraits::kFeistelBlocks == 16,
-                "Expecting 16 FeistelBlocks.");
-
-  // MSVC does a horrible job at unrolling loops.
-  // So we unroll the loop by hand to improve the performance.
-  const Vector128 s0 = Vector128Load(state + 0);
-  const Vector128 s1 = Vector128Load(state + 1);
-  const Vector128 s2 = Vector128Load(state + 2);
-  const Vector128 s3 = Vector128Load(state + 3);
-  const Vector128 s4 = Vector128Load(state + 4);
-  const Vector128 s5 = Vector128Load(state + 5);
-  const Vector128 s6 = Vector128Load(state + 6);
-  const Vector128 s7 = Vector128Load(state + 7);
-  const Vector128 s8 = Vector128Load(state + 8);
-  const Vector128 s9 = Vector128Load(state + 9);
-  const Vector128 s10 = Vector128Load(state + 10);
-  const Vector128 s11 = Vector128Load(state + 11);
-  const Vector128 s12 = Vector128Load(state + 12);
-  const Vector128 s13 = Vector128Load(state + 13);
-  const Vector128 s14 = Vector128Load(state + 14);
-  const Vector128 s15 = Vector128Load(state + 15);
-
-  // Encode even blocks with keys.
-  const Vector128 e0 = AesRound(s0, Vector128Load(keys + 0));
-  const Vector128 e2 = AesRound(s2, Vector128Load(keys + 1));
-  const Vector128 e4 = AesRound(s4, Vector128Load(keys + 2));
-  const Vector128 e6 = AesRound(s6, Vector128Load(keys + 3));
-  const Vector128 e8 = AesRound(s8, Vector128Load(keys + 4));
-  const Vector128 e10 = AesRound(s10, Vector128Load(keys + 5));
-  const Vector128 e12 = AesRound(s12, Vector128Load(keys + 6));
-  const Vector128 e14 = AesRound(s14, Vector128Load(keys + 7));
-
-  // Encode odd blocks with even output from above.
-  const Vector128 o1 = AesRound(e0, s1);
-  const Vector128 o3 = AesRound(e2, s3);
-  const Vector128 o5 = AesRound(e4, s5);
-  const Vector128 o7 = AesRound(e6, s7);
-  const Vector128 o9 = AesRound(e8, s9);
-  const Vector128 o11 = AesRound(e10, s11);
-  const Vector128 o13 = AesRound(e12, s13);
-  const Vector128 o15 = AesRound(e14, s15);
-
-  // Store odd blocks. (These will be shuffled later).
-  Vector128Store(o1, state + 1);
-  Vector128Store(o3, state + 3);
-  Vector128Store(o5, state + 5);
-  Vector128Store(o7, state + 7);
-  Vector128Store(o9, state + 9);
-  Vector128Store(o11, state + 11);
-  Vector128Store(o13, state + 13);
-  Vector128Store(o15, state + 15);
-
-  return keys + 8;
-}
-
-// Cryptographic permutation based via type-2 Generalized Feistel Network.
-// Indistinguishable from ideal by chosen-ciphertext adversaries using less than
-// 2^64 queries if the round function is a PRF. This is similar to the b=8 case
-// of Simpira v2, but more efficient than its generic construction for b=16.
-inline ABSL_TARGET_CRYPTO void Permute(
-    u64x2* state, const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) {
-  // (Successfully unrolled; the first iteration jumps into the second half)
-#ifdef __clang__
-#pragma clang loop unroll_count(2)
-#endif
-  for (size_t round = 0; round < RandenTraits::kFeistelRounds; ++round) {
-    keys = FeistelRound(state, keys);
-    BlockShuffle(state);
-  }
-}
-
-}  // namespace
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-bool HasRandenHwAesImplementation() { return true; }
-
-const void* ABSL_TARGET_CRYPTO RandenHwAes::GetKeys() {
-  // Round keys for one AES per Feistel round and branch.
-  // The canonical implementation uses first digits of Pi.
-#if defined(ABSL_ARCH_PPC)
-  return kRandenRoundKeysBE;
-#else
-  return kRandenRoundKeys;
-#endif
-}
-
-// NOLINTNEXTLINE
-void ABSL_TARGET_CRYPTO RandenHwAes::Absorb(const void* seed_void,
-                                            void* state_void) {
-  static_assert(RandenTraits::kCapacityBytes / sizeof(Vector128) == 1,
-                "Unexpected Randen kCapacityBlocks");
-  static_assert(RandenTraits::kStateBytes / sizeof(Vector128) == 16,
-                "Unexpected Randen kStateBlocks");
-
-  auto* state =
-      reinterpret_cast<u64x2 * ABSL_RANDOM_INTERNAL_RESTRICT>(state_void);
-  const auto* seed =
-      reinterpret_cast<const u64x2 * ABSL_RANDOM_INTERNAL_RESTRICT>(seed_void);
-
-  Vector128 b1 = Vector128Load(state + 1);
-  b1 ^= Vector128Load(seed + 0);
-  Vector128Store(b1, state + 1);
-
-  Vector128 b2 = Vector128Load(state + 2);
-  b2 ^= Vector128Load(seed + 1);
-  Vector128Store(b2, state + 2);
-
-  Vector128 b3 = Vector128Load(state + 3);
-  b3 ^= Vector128Load(seed + 2);
-  Vector128Store(b3, state + 3);
-
-  Vector128 b4 = Vector128Load(state + 4);
-  b4 ^= Vector128Load(seed + 3);
-  Vector128Store(b4, state + 4);
-
-  Vector128 b5 = Vector128Load(state + 5);
-  b5 ^= Vector128Load(seed + 4);
-  Vector128Store(b5, state + 5);
-
-  Vector128 b6 = Vector128Load(state + 6);
-  b6 ^= Vector128Load(seed + 5);
-  Vector128Store(b6, state + 6);
-
-  Vector128 b7 = Vector128Load(state + 7);
-  b7 ^= Vector128Load(seed + 6);
-  Vector128Store(b7, state + 7);
-
-  Vector128 b8 = Vector128Load(state + 8);
-  b8 ^= Vector128Load(seed + 7);
-  Vector128Store(b8, state + 8);
-
-  Vector128 b9 = Vector128Load(state + 9);
-  b9 ^= Vector128Load(seed + 8);
-  Vector128Store(b9, state + 9);
-
-  Vector128 b10 = Vector128Load(state + 10);
-  b10 ^= Vector128Load(seed + 9);
-  Vector128Store(b10, state + 10);
-
-  Vector128 b11 = Vector128Load(state + 11);
-  b11 ^= Vector128Load(seed + 10);
-  Vector128Store(b11, state + 11);
-
-  Vector128 b12 = Vector128Load(state + 12);
-  b12 ^= Vector128Load(seed + 11);
-  Vector128Store(b12, state + 12);
-
-  Vector128 b13 = Vector128Load(state + 13);
-  b13 ^= Vector128Load(seed + 12);
-  Vector128Store(b13, state + 13);
-
-  Vector128 b14 = Vector128Load(state + 14);
-  b14 ^= Vector128Load(seed + 13);
-  Vector128Store(b14, state + 14);
-
-  Vector128 b15 = Vector128Load(state + 15);
-  b15 ^= Vector128Load(seed + 14);
-  Vector128Store(b15, state + 15);
-}
-
-// NOLINTNEXTLINE
-void ABSL_TARGET_CRYPTO RandenHwAes::Generate(const void* keys_void,
-                                              void* state_void) {
-  static_assert(RandenTraits::kCapacityBytes == sizeof(Vector128),
-                "Capacity mismatch");
-
-  auto* state = reinterpret_cast<u64x2*>(state_void);
-  const auto* keys = reinterpret_cast<const u64x2*>(keys_void);
-
-  const Vector128 prev_inner = Vector128Load(state);
-
-  SwapEndian(state);
-
-  Permute(state, keys);
-
-  SwapEndian(state);
-
-  // Ensure backtracking resistance.
-  Vector128 inner = Vector128Load(state);
-  inner ^= prev_inner;
-  Vector128Store(inner, state);
-}
-
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // (ABSL_RANDEN_HWAES_IMPL)
diff --git a/third_party/abseil/absl/random/internal/randen_hwaes.h b/third_party/abseil/absl/random/internal/randen_hwaes.h
deleted file mode 100644
index 71a7f69..0000000
--- a/third_party/abseil/absl/random/internal/randen_hwaes.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_HWAES_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_HWAES_H_
-
-#include "absl/base/config.h"
-
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
-// symbols from arbitrary system and other headers, since it may be built
-// with different flags from other targets, using different levels of
-// optimization, potentially introducing ODR violations.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RANDen = RANDom generator or beetroots in Swiss High German.
-// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
-// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
-//
-// RandenHwAes implements the basic state manipulation methods.
-class RandenHwAes {
- public:
-  static void Generate(const void* keys, void* state_void);
-  static void Absorb(const void* seed_void, void* state_void);
-  static const void* GetKeys();
-};
-
-// HasRandenHwAesImplementation returns true when there is an accelerated
-// implementation, and false otherwise.  If there is no implementation,
-// then attempting to use it will abort the program.
-bool HasRandenHwAesImplementation();
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_HWAES_H_
diff --git a/third_party/abseil/absl/random/internal/randen_hwaes_test.cc b/third_party/abseil/absl/random/internal/randen_hwaes_test.cc
deleted file mode 100644
index 66ddb43..0000000
--- a/third_party/abseil/absl/random/internal/randen_hwaes_test.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen_hwaes.h"
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/platform.h"
-#include "absl/random/internal/randen_detect.h"
-#include "absl/random/internal/randen_traits.h"
-#include "absl/strings/str_format.h"
-
-namespace {
-
-using absl::random_internal::RandenHwAes;
-using absl::random_internal::RandenTraits;
-
-// Local state parameters.
-constexpr size_t kSeedBytes =
-    RandenTraits::kStateBytes - RandenTraits::kCapacityBytes;
-constexpr size_t kStateSizeT = RandenTraits::kStateBytes / sizeof(uint64_t);
-constexpr size_t kSeedSizeT = kSeedBytes / sizeof(uint32_t);
-
-struct alignas(16) randen {
-  uint64_t state[kStateSizeT];
-  uint32_t seed[kSeedSizeT];
-};
-
-TEST(RandenHwAesTest, Default) {
-  EXPECT_TRUE(absl::random_internal::CPUSupportsRandenHwAes());
-
-  constexpr uint64_t kGolden[] = {
-      0x6c6534090ee6d3ee, 0x044e2b9b9d5333c6, 0xc3c14f134e433977,
-      0xdda9f47cd90410ee, 0x887bf3087fd8ca10, 0xf0b780f545c72912,
-      0x15dbb1d37696599f, 0x30ec63baff3c6d59, 0xb29f73606f7f20a6,
-      0x02808a316f49a54c, 0x3b8feaf9d5c8e50e, 0x9cbf605e3fd9de8a,
-      0xc970ae1a78183bbb, 0xd8b2ffd356301ed5, 0xf4b327fe0fc73c37,
-      0xcdfd8d76eb8f9a19, 0xc3a506eb91420c9d, 0xd5af05dd3eff9556,
-      0x48db1bb78f83c4a1, 0x7023920e0d6bfe8c, 0x58d3575834956d42,
-      0xed1ef4c26b87b840, 0x8eef32a23e0b2df3, 0x497cabf3431154fc,
-      0x4e24370570029a8b, 0xd88b5749f090e5ea, 0xc651a582a970692f,
-      0x78fcec2cbb6342f5, 0x463cb745612f55db, 0x352ee4ad1816afe3,
-      0x026ff374c101da7e, 0x811ef0821c3de851,
-  };
-
-  alignas(16) randen d;
-  memset(d.state, 0, sizeof(d.state));
-  RandenHwAes::Generate(RandenHwAes::GetKeys(), d.state);
-
-  uint64_t* id = d.state;
-  for (const auto& elem : kGolden) {
-    auto a = absl::StrFormat("%#x", elem);
-    auto b = absl::StrFormat("%#x", *id++);
-    EXPECT_EQ(a, b);
-  }
-}
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-
-  ABSL_RAW_LOG(INFO, "ABSL_HAVE_ACCELERATED_AES=%d", ABSL_HAVE_ACCELERATED_AES);
-  ABSL_RAW_LOG(INFO, "ABSL_RANDOM_INTERNAL_AES_DISPATCH=%d",
-               ABSL_RANDOM_INTERNAL_AES_DISPATCH);
-
-#if defined(ABSL_ARCH_X86_64)
-  ABSL_RAW_LOG(INFO, "ABSL_ARCH_X86_64");
-#elif defined(ABSL_ARCH_X86_32)
-  ABSL_RAW_LOG(INFO, "ABSL_ARCH_X86_32");
-#elif defined(ABSL_ARCH_AARCH64)
-  ABSL_RAW_LOG(INFO, "ABSL_ARCH_AARCH64");
-#elif defined(ABSL_ARCH_ARM)
-  ABSL_RAW_LOG(INFO, "ABSL_ARCH_ARM");
-#elif defined(ABSL_ARCH_PPC)
-  ABSL_RAW_LOG(INFO, "ABSL_ARCH_PPC");
-#else
-  ABSL_RAW_LOG(INFO, "ARCH Unknown");
-#endif
-
-  int x = absl::random_internal::HasRandenHwAesImplementation();
-  ABSL_RAW_LOG(INFO, "HasRandenHwAesImplementation = %d", x);
-
-  int y = absl::random_internal::CPUSupportsRandenHwAes();
-  ABSL_RAW_LOG(INFO, "CPUSupportsRandenHwAes = %d", x);
-
-  if (!x || !y) {
-    ABSL_RAW_LOG(INFO, "Skipping Randen HWAES tests.");
-    return 0;
-  }
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/abseil/absl/random/internal/randen_round_keys.cc b/third_party/abseil/absl/random/internal/randen_round_keys.cc
deleted file mode 100644
index 5fb3ca5..0000000
--- a/third_party/abseil/absl/random/internal/randen_round_keys.cc
+++ /dev/null
@@ -1,462 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen_traits.h"
-
-// This file contains only the round keys for randen.
-//
-// "Nothing up my sleeve" numbers from the first hex digits of Pi, obtained
-// from http://hexpi.sourceforge.net/. The array was generated by following
-// Python script:
-
-/*
-python >tmp.cc << EOF
-"""Generates Randen round keys array from pi-hex.62500.txt file."""
-import binascii
-
-KEYS = 17 * 8
-
-def chunks(l, n):
-    """Yield successive n-sized chunks from l."""
-    for i in range(0, len(l), n):
-        yield l[i:i + n]
-
-def pairwise(t):
-    """Transforms sequence into sequence of pairs."""
-    it = iter(t)
-    return zip(it,it)
-
-def digits_from_pi():
-  """Reads digits from hexpi.sourceforge.net file."""
-  with open("pi-hex.62500.txt") as file:
-    return file.read()
-
-def digits_from_urandom():
-  """Reads digits from /dev/urandom."""
-  with open("/dev/urandom") as file:
-    return binascii.hexlify(file.read(KEYS * 16))
-
-def print_row(b)
-  print("  0x{0}, 0x{1}, 0x{2}, 0x{3}, 0x{4}, 0x{5}, 0x{6}, 0x{7}, 0x{8}, 0x{9},
-0x{10}, 0x{11}, 0x{12}, 0x{13}, 0x{14}, 0x{15},".format(*b))
-
-
-digits = digits_from_pi()
-#digits = digits_from_urandom()
-
-print("namespace {")
-print("static constexpr size_t kKeyBytes = {0};\n".format(KEYS * 16))
-print("}")
-
-print("alignas(16) const unsigned char kRandenRoundKeysBE[kKeyBytes] = {")
-
-for i, u16 in zip(range(KEYS), chunks(digits, 32)):
-  b = list(chunks(u16, 2))
-  print_row(b)
-
-print("};")
-
-print("alignas(16) const unsigned char kRandenRoundKeys[kKeyBytes] = {")
-
-for i, u16 in zip(range(KEYS), chunks(digits, 32)):
-  b = list(chunks(u16, 2))
-  b.reverse()
-  print_row(b)
-
-print("};")
-
-EOF
-
-*/
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-static constexpr size_t kKeyBytes = 2176;
-}
-
-alignas(16) const unsigned char kRandenRoundKeysBE[kKeyBytes] = {
-    0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3, 0x13, 0x19, 0x8A, 0x2E,
-    0x03, 0x70, 0x73, 0x44, 0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
-    0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89, 0x45, 0x28, 0x21, 0xE6,
-    0x38, 0xD0, 0x13, 0x77, 0xBE, 0x54, 0x66, 0xCF, 0x34, 0xE9, 0x0C, 0x6C,
-    0xC0, 0xAC, 0x29, 0xB7, 0xC9, 0x7C, 0x50, 0xDD, 0x3F, 0x84, 0xD5, 0xB5,
-    0xB5, 0x47, 0x09, 0x17, 0x92, 0x16, 0xD5, 0xD9, 0x89, 0x79, 0xFB, 0x1B,
-    0xD1, 0x31, 0x0B, 0xA6, 0x98, 0xDF, 0xB5, 0xAC, 0x2F, 0xFD, 0x72, 0xDB,
-    0xD0, 0x1A, 0xDF, 0xB7, 0xB8, 0xE1, 0xAF, 0xED, 0x6A, 0x26, 0x7E, 0x96,
-    0xBA, 0x7C, 0x90, 0x45, 0xF1, 0x2C, 0x7F, 0x99, 0x24, 0xA1, 0x99, 0x47,
-    0xB3, 0x91, 0x6C, 0xF7, 0x08, 0x01, 0xF2, 0xE2, 0x85, 0x8E, 0xFC, 0x16,
-    0x63, 0x69, 0x20, 0xD8, 0x71, 0x57, 0x4E, 0x69, 0xA4, 0x58, 0xFE, 0xA3,
-    0xF4, 0x93, 0x3D, 0x7E, 0x0D, 0x95, 0x74, 0x8F, 0x72, 0x8E, 0xB6, 0x58,
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-    0xA3, 0xAA, 0xAB, 0xEA, 0xDB, 0x6C, 0x4F, 0x15, 0xFA, 0xCB, 0x4F, 0xD0,
-    0xC7, 0x42, 0xF4, 0x42, 0xEF, 0x6A, 0xBB, 0xB5, 0x65, 0x4F, 0x3B, 0x1D,
-    0x41, 0xCD, 0x21, 0x05, 0xD8, 0x1E, 0x79, 0x9E, 0x86, 0x85, 0x4D, 0xC7,
-    0xE4, 0x4B, 0x47, 0x6A, 0x3D, 0x81, 0x62, 0x50, 0xCF, 0x62, 0xA1, 0xF2,
-    0x5B, 0x8D, 0x26, 0x46, 0xFC, 0x88, 0x83, 0xA0, 0xC1, 0xC7, 0xB6, 0xA3,
-    0x7F, 0x15, 0x24, 0xC3, 0x69, 0xCB, 0x74, 0x92, 0x47, 0x84, 0x8A, 0x0B,
-    0x56, 0x92, 0xB2, 0x85, 0x09, 0x5B, 0xBF, 0x00, 0xAD, 0x19, 0x48, 0x9D,
-    0x14, 0x62, 0xB1, 0x74, 0x23, 0x82, 0x0D, 0x00, 0x58, 0x42, 0x8D, 0x2A,
-    0x0C, 0x55, 0xF5, 0xEA, 0x1D, 0xAD, 0xF4, 0x3E, 0x23, 0x3F, 0x70, 0x61,
-    0x33, 0x72, 0xF0, 0x92, 0x8D, 0x93, 0x7E, 0x41, 0xD6, 0x5F, 0xEC, 0xF1,
-    0x6C, 0x22, 0x3B, 0xDB, 0x7C, 0xDE, 0x37, 0x59, 0xCB, 0xEE, 0x74, 0x60,
-    0x40, 0x85, 0xF2, 0xA7, 0xCE, 0x77, 0x32, 0x6E, 0xA6, 0x07, 0x80, 0x84,
-    0x19, 0xF8, 0x50, 0x9E, 0xE8, 0xEF, 0xD8, 0x55, 0x61, 0xD9, 0x97, 0x35,
-    0xA9, 0x69, 0xA7, 0xAA, 0xC5, 0x0C, 0x06, 0xC2, 0x5A, 0x04, 0xAB, 0xFC,
-    0x80, 0x0B, 0xCA, 0xDC, 0x9E, 0x44, 0x7A, 0x2E, 0xC3, 0x45, 0x34, 0x84,
-    0xFD, 0xD5, 0x67, 0x05, 0x0E, 0x1E, 0x9E, 0xC9, 0xDB, 0x73, 0xDB, 0xD3,
-    0x10, 0x55, 0x88, 0xCD, 0x67, 0x5F, 0xDA, 0x79, 0xE3, 0x67, 0x43, 0x40,
-    0xC5, 0xC4, 0x34, 0x65, 0x71, 0x3E, 0x38, 0xD8, 0x3D, 0x28, 0xF8, 0x9E,
-    0xF1, 0x6D, 0xFF, 0x20, 0x15, 0x3E, 0x21, 0xE7, 0x8F, 0xB0, 0x3D, 0x4A,
-    0xE6, 0xE3, 0x9F, 0x2B, 0xDB, 0x83, 0xAD, 0xF7, 0xE9, 0x3D, 0x5A, 0x68,
-    0x94, 0x81, 0x40, 0xF7, 0xF6, 0x4C, 0x26, 0x1C, 0x94, 0x69, 0x29, 0x34,
-    0x41, 0x15, 0x20, 0xF7, 0x76, 0x02, 0xD4, 0xF7, 0xBC, 0xF4, 0x6B, 0x2E,
-    0xD4, 0xA1, 0x00, 0x68, 0xD4, 0x08, 0x24, 0x71, 0x33, 0x20, 0xF4, 0x6A,
-    0x43, 0xB7, 0xD4, 0xB7, 0x50, 0x00, 0x61, 0xAF, 0x1E, 0x39, 0xF6, 0x2E,
-    0x97, 0x24, 0x45, 0x46,
-};
-
-alignas(16) const unsigned char kRandenRoundKeys[kKeyBytes] = {
-    0x44, 0x73, 0x70, 0x03, 0x2E, 0x8A, 0x19, 0x13, 0xD3, 0x08, 0xA3, 0x85,
-    0x88, 0x6A, 0x3F, 0x24, 0x89, 0x6C, 0x4E, 0xEC, 0x98, 0xFA, 0x2E, 0x08,
-    0xD0, 0x31, 0x9F, 0x29, 0x22, 0x38, 0x09, 0xA4, 0x6C, 0x0C, 0xE9, 0x34,
-    0xCF, 0x66, 0x54, 0xBE, 0x77, 0x13, 0xD0, 0x38, 0xE6, 0x21, 0x28, 0x45,
-    0x17, 0x09, 0x47, 0xB5, 0xB5, 0xD5, 0x84, 0x3F, 0xDD, 0x50, 0x7C, 0xC9,
-    0xB7, 0x29, 0xAC, 0xC0, 0xAC, 0xB5, 0xDF, 0x98, 0xA6, 0x0B, 0x31, 0xD1,
-    0x1B, 0xFB, 0x79, 0x89, 0xD9, 0xD5, 0x16, 0x92, 0x96, 0x7E, 0x26, 0x6A,
-    0xED, 0xAF, 0xE1, 0xB8, 0xB7, 0xDF, 0x1A, 0xD0, 0xDB, 0x72, 0xFD, 0x2F,
-    0xF7, 0x6C, 0x91, 0xB3, 0x47, 0x99, 0xA1, 0x24, 0x99, 0x7F, 0x2C, 0xF1,
-    0x45, 0x90, 0x7C, 0xBA, 0x69, 0x4E, 0x57, 0x71, 0xD8, 0x20, 0x69, 0x63,
-    0x16, 0xFC, 0x8E, 0x85, 0xE2, 0xF2, 0x01, 0x08, 0x58, 0xB6, 0x8E, 0x72,
-    0x8F, 0x74, 0x95, 0x0D, 0x7E, 0x3D, 0x93, 0xF4, 0xA3, 0xFE, 0x58, 0xA4,
-    0xB5, 0x59, 0x5A, 0xC2, 0x1D, 0xA4, 0x54, 0x7B, 0xEE, 0x4A, 0x15, 0x82,
-    0x58, 0xCD, 0x8B, 0x71, 0xF0, 0x85, 0x60, 0x28, 0x23, 0xB0, 0xD1, 0xC5,
-    0x13, 0x60, 0xF2, 0x2A, 0x39, 0xD5, 0x30, 0x9C, 0x0E, 0x18, 0x3A, 0x60,
-    0xB0, 0xDC, 0x79, 0x8E, 0xEF, 0x38, 0xDB, 0xB8, 0x18, 0x79, 0x41, 0xCA,
-    0x27, 0x4B, 0x31, 0xBD, 0xC1, 0x77, 0x15, 0xD7, 0x3E, 0x8A, 0x1E, 0xB0,
-    0x8B, 0x0E, 0x9E, 0x6C, 0x94, 0xAB, 0x55, 0xAA, 0xF3, 0x25, 0x55, 0xE6,
-    0x60, 0x5C, 0x60, 0x55, 0xDA, 0x2F, 0xAF, 0x78, 0xB6, 0x10, 0xAB, 0x2A,
-    0x6A, 0x39, 0xCA, 0x55, 0x40, 0x14, 0xE8, 0x63, 0x62, 0x98, 0x48, 0x57,
-    0x93, 0xE9, 0x72, 0x7C, 0xAF, 0x86, 0x54, 0xA1, 0xCE, 0xE8, 0x41, 0x11,
-    0x34, 0x5C, 0xCC, 0xB4, 0xF6, 0x31, 0x18, 0x74, 0x5D, 0xC5, 0xA9, 0x2B,
-    0x2A, 0xBC, 0x6F, 0x63, 0x11, 0x14, 0xEE, 0xB3, 0x5C, 0xCF, 0x24, 0x6C,
-    0x33, 0xBA, 0xD6, 0xAF, 0x1E, 0x93, 0x87, 0x9B, 0x16, 0x3E, 0x5C, 0xCE,
-    0xAF, 0xB9, 0x4B, 0x6B, 0x98, 0x48, 0x8F, 0x3B, 0x77, 0x86, 0x95, 0x28,
-    0x81, 0x53, 0x32, 0x7A, 0x91, 0xA9, 0x21, 0xFB, 0xCC, 0x09, 0xD8, 0x61,
-    0x93, 0x21, 0x28, 0x66, 0x1B, 0xE8, 0xBF, 0xC4, 0xB1, 0x75, 0x85, 0xE9,
-    0x5D, 0x5D, 0x84, 0xEF, 0x32, 0x80, 0xEC, 0x5D, 0x60, 0xAC, 0x7C, 0x48,
-    0xC5, 0xAC, 0x96, 0xD3, 0x81, 0x3E, 0x89, 0x23, 0x88, 0x1B, 0x65, 0xEB,
-    0x02, 0x23, 0x26, 0xDC, 0x04, 0x20, 0x84, 0xA4, 0x82, 0x44, 0x0B, 0x2E,
-    0x39, 0x42, 0xF4, 0x83, 0xF3, 0x6F, 0x6D, 0x0F, 0x9A, 0x6C, 0xE9, 0xF6,
-    0x42, 0x68, 0xC6, 0x21, 0x5E, 0x9B, 0x1F, 0x9E, 0x4A, 0xF0, 0xC8, 0x69,
-    0x68, 0x2F, 0x54, 0xD8, 0xD2, 0xA0, 0x51, 0x6A, 0xF0, 0x88, 0xD3, 0xAB,
-    0x61, 0x9C, 0x0C, 0x67, 0xE4, 0x3B, 0x7A, 0x13, 0x6C, 0x0B, 0xEF, 0x6E,
-    0xA3, 0x33, 0x51, 0xAB, 0x28, 0xA7, 0x0F, 0x96, 0x76, 0x01, 0xAF, 0x39,
-    0x1D, 0x65, 0xF1, 0xA1, 0x98, 0x2A, 0xFB, 0x7E, 0x50, 0xF0, 0x3B, 0xBA,
-    0xB4, 0x9F, 0x6F, 0x45, 0x19, 0x86, 0xEE, 0x8C, 0x88, 0x0E, 0x43, 0x82,
-    0x3E, 0x59, 0xCA, 0x66, 0x73, 0x20, 0xC1, 0x85, 0xD8, 0x75, 0x6F, 0xE0,
-    0xBE, 0x5E, 0x8B, 0x3B, 0xC3, 0xA5, 0x84, 0x7D, 0x06, 0x77, 0x3F, 0x36,
-    0x62, 0xAA, 0xD3, 0x4E, 0xA6, 0x6A, 0xC1, 0x56, 0x9F, 0x44, 0x1A, 0x40,
-    0x48, 0x12, 0x0A, 0xD0, 0x24, 0xD7, 0xD0, 0x37, 0x3D, 0x02, 0x9B, 0x42,
-    0x72, 0xDF, 0xFE, 0x1B, 0x7B, 0x1B, 0x99, 0x80, 0xC9, 0x72, 0x53, 0x07,
-    0x9B, 0xC0, 0xF1, 0x49, 0xD3, 0xEA, 0x0F, 0xDB, 0x3B, 0x4C, 0x79, 0xB6,
-    0x1A, 0x50, 0xFE, 0xE3, 0xF7, 0xDE, 0xE8, 0xF6, 0xD8, 0x79, 0xD4, 0x25,
-    0xC4, 0x60, 0x9F, 0x40, 0xB6, 0x4F, 0xA9, 0xC1, 0xBA, 0x06, 0xC0, 0x04,
-    0xBD, 0xE0, 0x6C, 0x97, 0xB5, 0x53, 0x6C, 0x3E, 0xAF, 0x6F, 0xFB, 0x68,
-    0x63, 0x24, 0x6A, 0x19, 0xC2, 0x9E, 0x5C, 0x5E, 0x2C, 0x95, 0x30, 0x9B,
-    0x1F, 0x51, 0xFC, 0x6D, 0x6F, 0xEC, 0x52, 0x3B, 0xEB, 0xB2, 0x39, 0x13,
-    0xFD, 0x4A, 0x33, 0xDE, 0x04, 0xD0, 0xE3, 0xBE, 0x09, 0xBD, 0x5E, 0xAF,
-    0x44, 0x45, 0x81, 0xCC, 0x0F, 0x74, 0xC8, 0x45, 0x57, 0xA8, 0xCB, 0xC0,
-    0xB3, 0x4B, 0x2E, 0x19, 0x07, 0x28, 0x0F, 0x66, 0x0A, 0x32, 0x60, 0x1A,
-    0xBD, 0xC0, 0x79, 0x55, 0xDB, 0xFB, 0xD3, 0xB9, 0x39, 0x5F, 0x0B, 0xD2,
-    0xCC, 0xA3, 0x1F, 0xFB, 0xFE, 0x25, 0x9F, 0x67, 0x79, 0x72, 0x2C, 0x40,
-    0xC6, 0x00, 0xA1, 0xD6, 0x15, 0x6B, 0x61, 0xFD, 0xDF, 0x16, 0x75, 0x3C,
-    0xF8, 0x22, 0x32, 0xDB, 0xF8, 0xE9, 0xA5, 0x8E, 0x60, 0x87, 0x23, 0xFD,
-    0xFA, 0xB5, 0x3D, 0x32, 0xAB, 0x52, 0x05, 0xAD, 0xC8, 0x1E, 0x50, 0x2F,
-    0xA0, 0x8C, 0x6F, 0xCA, 0xBB, 0x57, 0x5C, 0x9E, 0x82, 0xDF, 0x00, 0x3E,
-    0x48, 0x7B, 0x31, 0x53, 0xC3, 0xFF, 0x7E, 0x28, 0xF6, 0xA8, 0x42, 0xD5,
-    0xDB, 0x69, 0x17, 0xDF, 0x2E, 0x56, 0x87, 0x1A, 0xC8, 0x58, 0xCA, 0xBB,
-    0xB0, 0x27, 0x5B, 0x69, 0x73, 0x55, 0x4F, 0x8C, 0xC6, 0x32, 0x67, 0xAC,
-    0xB8, 0x83, 0x21, 0xFD, 0x98, 0x3D, 0xFA, 0x10, 0xA0, 0x11, 0xF0, 0xB8,
-    0x5D, 0xA3, 0xFF, 0xE1, 0x65, 0x45, 0xF8, 0xB6, 0x79, 0xE4, 0x53, 0x9A,
-    0x5B, 0xD3, 0xD1, 0x2D, 0x6C, 0xB5, 0xFC, 0x4A, 0x33, 0x7E, 0xCB, 0xA4,
-    0xDA, 0xF2, 0xDD, 0xE1, 0x90, 0x97, 0xFB, 0x4B, 0xBC, 0x49, 0x8E, 0xD2,
-    0x01, 0x4C, 0x77, 0x36, 0xDA, 0xCA, 0x20, 0xEF, 0xE8, 0xC6, 0xE4, 0xCE,
-    0x41, 0x13, 0xFB, 0x62, 0x98, 0x91, 0x90, 0xAE, 0x4D, 0xDA, 0xDB, 0x95,
-    0xB4, 0x1F, 0xF1, 0x2B, 0xFE, 0x9E, 0x7E, 0xD0, 0xE0, 0x25, 0xC7, 0xAF,
-    0xD0, 0xD1, 0x8E, 0xD0, 0xA0, 0xD5, 0x93, 0x6B, 0x71, 0x8E, 0xAD, 0xEA,
-    0x64, 0x2B, 0x12, 0xF2, 0xFB, 0xE2, 0xF6, 0x8F, 0xB7, 0x94, 0x75, 0x8E,
-    0x2F, 0x5B, 0x3C, 0x8E, 0x1C, 0xC3, 0x8F, 0x68, 0xA0, 0x5E, 0xAD, 0x4F,
-    0x1C, 0xF0, 0x0D, 0x90, 0x12, 0xB8, 0x88, 0x88, 0x77, 0x17, 0x0E, 0xBE,
-    0x18, 0x22, 0x2F, 0x2F, 0xAD, 0xC1, 0xA8, 0xB3, 0x91, 0xF1, 0xCF, 0xD1,
-    0xE8, 0x74, 0x6F, 0xB5, 0x0F, 0xCC, 0xA0, 0xE5, 0xA1, 0x1F, 0x02, 0x8B,
-    0xFE, 0x2D, 0x75, 0xEA, 0xB7, 0xE0, 0x13, 0xFD, 0xE0, 0x4F, 0xA8, 0xB4,
-    0x99, 0xE2, 0x89, 0xCE, 0xD6, 0xF3, 0xAC, 0x18, 0x05, 0x77, 0x95, 0x80,
-    0x66, 0xA2, 0x5F, 0x16, 0xD9, 0xA8, 0xAD, 0xD2, 0x81, 0x3B, 0xC4, 0x7C,
-    0x86, 0xFA, 0xB5, 0x77, 0x65, 0x20, 0xAD, 0xE6, 0x77, 0x14, 0x1A, 0x21,
-    0x14, 0x73, 0xCC, 0x93, 0xA0, 0x89, 0x3E, 0x7B, 0x0C, 0xAF, 0xCD, 0xEB,
-    0xCF, 0x35, 0x9D, 0xFB, 0xF5, 0x42, 0x54, 0xC7, 0x5E, 0xB3, 0x71, 0x20,
-    0x2D, 0x0E, 0x25, 0x00, 0x49, 0x7E, 0x1E, 0xAE, 0xD3, 0x1B, 0x41, 0xD6,
-    0x1E, 0xB9, 0x09, 0xF0, 0x9B, 0x36, 0x64, 0x24, 0xAF, 0xE0, 0xB8, 0x57,
-    0xBB, 0x00, 0x68, 0x22, 0x7F, 0x53, 0x5A, 0xD9, 0x89, 0x43, 0xC1, 0x78,
-    0xAA, 0xA6, 0xDF, 0x59, 0x1D, 0x91, 0x63, 0x55, 0xA9, 0xCF, 0x95, 0x62,
-    0x76, 0x03, 0x26, 0x83, 0xC5, 0xB9, 0xE5, 0x02, 0xA2, 0x5B, 0x7D, 0x20,
-    0x4A, 0xA9, 0x14, 0x7B, 0xCA, 0x2D, 0x47, 0xB3, 0x41, 0x4A, 0x73, 0x4E,
-    0x68, 0x19, 0xC8, 0x11, 0xE4, 0xC6, 0x9B, 0xBC, 0x3F, 0x57, 0x0F, 0xD6,
-    0x15, 0x29, 0x53, 0x9A, 0x52, 0x00, 0x51, 0x1B, 0x1F, 0xE9, 0x1B, 0x57,
-    0xB5, 0x6F, 0xBA, 0x08, 0x00, 0x74, 0xE6, 0x81, 0x76, 0xA4, 0x60, 0x2B,
-    0xB6, 0xF9, 0xB9, 0xE7, 0x21, 0x65, 0x63, 0xB6, 0x15, 0xD9, 0x0D, 0x2A,
-    0x6B, 0xEC, 0x96, 0xF2, 0xA1, 0x8F, 0x9F, 0xA9, 0x5D, 0x2D, 0xB0, 0x53,
-    0x64, 0x56, 0x85, 0xC5, 0x2E, 0x05, 0x34, 0xFF, 0x44, 0x29, 0xB3, 0xB5,
-    0xE9, 0x70, 0x7A, 0x4B, 0x6A, 0x07, 0x85, 0x6E, 0x99, 0x47, 0xBA, 0x08,
-    0x7D, 0xDF, 0xA7, 0x49, 0xB0, 0xA6, 0x6E, 0xAD, 0x23, 0x26, 0x19, 0xC4,
-    0x2E, 0x09, 0x75, 0xDB, 0xFF, 0x18, 0x9A, 0x69, 0x71, 0x8C, 0xAA, 0xEC,
-    0x66, 0xB2, 0xED, 0x8F, 0xB8, 0x60, 0xEE, 0x9C, 0x29, 0x4C, 0x09, 0x75,
-    0xA5, 0x02, 0x36, 0x19, 0xE1, 0x9E, 0xB1, 0xC2, 0x6C, 0x52, 0x64, 0x56,
-    0x65, 0x9D, 0x42, 0x5B, 0x9A, 0x98, 0x54, 0x3F, 0x3E, 0x3A, 0x18, 0xE4,
-    0x40, 0x13, 0x59, 0xA0, 0xF5, 0x30, 0xE8, 0xEF, 0x07, 0x9C, 0xD2, 0xA1,
-    0xD6, 0x3F, 0xF7, 0x99, 0xD6, 0xE4, 0x8F, 0x6B, 0x26, 0xEB, 0x70, 0x84,
-    0x86, 0x20, 0xDD, 0x4C, 0xC1, 0x5D, 0x25, 0xF0, 0xE6, 0x38, 0x2D, 0x4D,
-    0xC9, 0xEF, 0xBA, 0x3E, 0x3F, 0x6B, 0x68, 0x09, 0x5E, 0xCC, 0x1E, 0x02,
-    0xC6, 0xE9, 0x82, 0x63, 0x86, 0xE2, 0xA0, 0x52, 0x84, 0x35, 0x7F, 0x68,
-    0xA1, 0x70, 0x6A, 0x6B, 0x14, 0x18, 0x97, 0x3C, 0x5C, 0xAE, 0xDE, 0x7F,
-    0x1C, 0x84, 0x07, 0x3E, 0x37, 0x07, 0x50, 0xAA, 0x05, 0x53, 0x9C, 0xB7,
-    0x0D, 0x0C, 0x50, 0xF0, 0x37, 0xDA, 0x3A, 0xB0, 0xB8, 0xF2, 0x16, 0x57,
-    0xEC, 0x44, 0x7D, 0x8E, 0xB2, 0x74, 0xB5, 0x3C, 0x1A, 0xF5, 0x0C, 0xAE,
-    0xFF, 0xB3, 0x00, 0x02, 0x04, 0x1F, 0x1C, 0xF0, 0xF6, 0x2F, 0xA9, 0x7C,
-    0xF9, 0x13, 0x91, 0xD1, 0xBD, 0x21, 0x09, 0xDC, 0x58, 0x7A, 0x83, 0x25,
-    0xDC, 0xDA, 0xC2, 0x37, 0x81, 0xE5, 0xE5, 0x3A, 0x01, 0x47, 0xF5, 0x22,
-    0x73, 0x47, 0x32, 0x94, 0x0E, 0x03, 0xD0, 0x0F, 0x46, 0x61, 0x44, 0xA9,
-    0xA7, 0xDD, 0xF3, 0x9A, 0x34, 0x76, 0xB5, 0xC8, 0x2F, 0x0E, 0xEA, 0x3B,
-    0x99, 0xCD, 0x38, 0xE2, 0x41, 0x1E, 0x75, 0xA4, 0x3E, 0xC7, 0xC8, 0xEC,
-    0x08, 0xB9, 0x6D, 0x4F, 0x38, 0x8B, 0x54, 0x4E, 0x31, 0xB3, 0x3E, 0x18,
-    0xA1, 0xBB, 0x80, 0x32, 0x79, 0x7C, 0x97, 0x24, 0x90, 0x12, 0xB8, 0x2C,
-    0xBF, 0x04, 0x0A, 0xF6, 0x03, 0x0D, 0x42, 0x6F, 0x10, 0x08, 0x93, 0xD9,
-    0x1F, 0x77, 0x9A, 0xDE, 0xAF, 0x89, 0xAF, 0xBC, 0x72, 0xB0, 0x79, 0x56,
-    0x24, 0x71, 0x6B, 0x2E, 0x1F, 0x72, 0x12, 0x55, 0x2E, 0x3F, 0xCF, 0xDC,
-    0x12, 0xAE, 0x8B, 0xB3, 0x17, 0xDA, 0x08, 0x74, 0x18, 0x47, 0x58, 0x7A,
-    0x87, 0xCD, 0x84, 0x9F, 0xE6, 0xDD, 0x1A, 0x50, 0xFA, 0x1D, 0x85, 0xDB,
-    0x3A, 0xEC, 0x7A, 0xEC, 0x8C, 0x7D, 0x4B, 0xE9, 0xBC, 0x9A, 0x9F, 0xBC,
-    0x08, 0xD8, 0x15, 0x32, 0x47, 0x18, 0x1C, 0xEF, 0xD2, 0xC3, 0x64, 0xC4,
-    0x66, 0x43, 0x09, 0x63, 0x51, 0xC4, 0x65, 0x2A, 0x43, 0x4D, 0xA1, 0x12,
-    0x16, 0xBA, 0xC2, 0x24, 0x37, 0x3B, 0x43, 0xDD, 0x55, 0x4E, 0x31, 0x10,
-    0x9E, 0xF8, 0xDF, 0x71, 0xDD, 0xE4, 0x3A, 0x13, 0x02, 0x00, 0x94, 0x50,
-    0x6B, 0xC7, 0xA3, 0xD7, 0xF1, 0x56, 0x35, 0x04, 0x9B, 0x19, 0x11, 0x5F,
-    0xD6, 0x77, 0xAC, 0x81, 0xFA, 0xFB, 0xF1, 0x97, 0xED, 0xE6, 0x8F, 0xF2,
-    0x09, 0xA5, 0x24, 0x59, 0x3B, 0x18, 0x11, 0x3C, 0xB1, 0x6F, 0xE9, 0xEA,
-    0x70, 0x45, 0xE3, 0x86, 0x6E, 0x3C, 0x15, 0x1E, 0x2C, 0xBF, 0xBA, 0x9E,
-    0xFA, 0x06, 0x3D, 0x4E, 0x1C, 0xE7, 0x1F, 0x77, 0xB3, 0x2A, 0x3E, 0x5A,
-    0x0A, 0x5E, 0x0E, 0x86, 0x25, 0xC8, 0x66, 0x52, 0xD6, 0x89, 0x3E, 0x80,
-    0x0F, 0x1D, 0xE7, 0x99, 0xB9, 0xDC, 0x65, 0x29, 0x78, 0xEA, 0xE2, 0x94,
-    0xBA, 0x0E, 0x15, 0xC6, 0x6A, 0xB3, 0x10, 0x9C, 0x78, 0xC9, 0x4C, 0x2E,
-    0x3D, 0x2B, 0x1D, 0x36, 0xA7, 0x4E, 0xF7, 0xF2, 0xF4, 0x2D, 0x0A, 0x1E,
-    0x53, 0x3C, 0xFC, 0xA6, 0xB6, 0x12, 0x13, 0xF7, 0x08, 0xA7, 0x23, 0x52,
-    0x60, 0x79, 0xC2, 0x19, 0x0F, 0x26, 0x39, 0x19, 0x83, 0xC8, 0x7B, 0xA6,
-    0x95, 0x45, 0xBC, 0xE3, 0x66, 0x1F, 0xC3, 0xEA, 0x6E, 0xFE, 0xAD, 0xEB,
-    0xA5, 0x5A, 0x6C, 0xBE, 0xEF, 0xDD, 0x32, 0xC3, 0x28, 0xFF, 0x8C, 0x01,
-    0xD1, 0x37, 0x7F, 0xB1, 0x3B, 0x95, 0x2F, 0xDB, 0x0F, 0xA5, 0xCE, 0xEE,
-    0x02, 0x97, 0xAB, 0x68, 0x85, 0x21, 0x58, 0x65, 0x70, 0x61, 0x07, 0x29,
-    0x28, 0xB6, 0x21, 0x15, 0x84, 0x2F, 0x6E, 0x5B, 0xAD, 0x7D, 0xEF, 0x2A,
-    0x96, 0xBD, 0x61, 0xEB, 0x30, 0xA8, 0xCC, 0x13, 0x10, 0x15, 0x9F, 0x61,
-    0x75, 0x47, 0xDD, 0xEC, 0x39, 0xA2, 0x70, 0x4C, 0x90, 0x5C, 0x73, 0xB5,
-    0xCF, 0x63, 0x03, 0xAA, 0x1E, 0xFE, 0x34, 0x03, 0xA7, 0x2C, 0x62, 0x60,
-    0xBC, 0x86, 0xCC, 0xEE, 0x14, 0xDE, 0xAA, 0xCB, 0x0B, 0x9E, 0x9E, 0xD5,
-    0xCA, 0xF0, 0xBD, 0x19, 0xAF, 0x1E, 0x8B, 0x64, 0x6E, 0x84, 0xF3, 0xB2,
-    0xAB, 0x5C, 0xAB, 0x9C, 0xB3, 0xB4, 0x2A, 0x3C, 0x32, 0x5A, 0x68, 0x40,
-    0x50, 0xBB, 0x5A, 0x65, 0xB9, 0x69, 0x23, 0xA0, 0x99, 0xA0, 0x5F, 0x87,
-    0x19, 0x0B, 0x54, 0x9B, 0xF7, 0xB8, 0x21, 0xC0, 0xD5, 0xE9, 0x9E, 0x31,
-    0x77, 0x2D, 0xE3, 0x97, 0x9A, 0x88, 0x37, 0xF8, 0xA8, 0x7D, 0x3D, 0x62,
-    0x7E, 0x99, 0xF7, 0x95, 0xD6, 0x1F, 0xE6, 0xC7, 0x29, 0x88, 0x35, 0x0E,
-    0x81, 0x12, 0x68, 0x16, 0x5F, 0x93, 0xED, 0x11, 0x63, 0x72, 0x22, 0x1B,
-    0xA5, 0x84, 0xF5, 0x57, 0x99, 0xBA, 0x58, 0x78, 0xA1, 0xDF, 0xDE, 0x96,
-    0x54, 0x30, 0x2E, 0x53, 0xEB, 0x0A, 0xB3, 0xCD, 0x96, 0x46, 0xC2, 0x1A,
-    0xFF, 0xC3, 0x83, 0x9B, 0xEA, 0xFF, 0xC6, 0x34, 0xEF, 0xF2, 0xEB, 0x58,
-    0x28, 0x31, 0xBC, 0x6D, 0xE4, 0x48, 0xD9, 0x8F, 0xE3, 0xB7, 0x64, 0xE8,
-    0xD9, 0x14, 0x4A, 0x5D, 0x73, 0x3C, 0x7C, 0xEE, 0x61, 0xED, 0x28, 0xFE,
-    0xEA, 0xAB, 0xAA, 0xA3, 0xB6, 0xE2, 0xEE, 0x45, 0xE0, 0x13, 0x3E, 0x20,
-    0x14, 0x5D, 0x10, 0x42, 0xB5, 0xBB, 0x6A, 0xEF, 0x42, 0xF4, 0x42, 0xC7,
-    0xD0, 0x4F, 0xCB, 0xFA, 0x15, 0x4F, 0x6C, 0xDB, 0xC7, 0x4D, 0x85, 0x86,
-    0x9E, 0x79, 0x1E, 0xD8, 0x05, 0x21, 0xCD, 0x41, 0x1D, 0x3B, 0x4F, 0x65,
-    0x46, 0x26, 0x8D, 0x5B, 0xF2, 0xA1, 0x62, 0xCF, 0x50, 0x62, 0x81, 0x3D,
-    0x6A, 0x47, 0x4B, 0xE4, 0x92, 0x74, 0xCB, 0x69, 0xC3, 0x24, 0x15, 0x7F,
-    0xA3, 0xB6, 0xC7, 0xC1, 0xA0, 0x83, 0x88, 0xFC, 0x9D, 0x48, 0x19, 0xAD,
-    0x00, 0xBF, 0x5B, 0x09, 0x85, 0xB2, 0x92, 0x56, 0x0B, 0x8A, 0x84, 0x47,
-    0xEA, 0xF5, 0x55, 0x0C, 0x2A, 0x8D, 0x42, 0x58, 0x00, 0x0D, 0x82, 0x23,
-    0x74, 0xB1, 0x62, 0x14, 0x41, 0x7E, 0x93, 0x8D, 0x92, 0xF0, 0x72, 0x33,
-    0x61, 0x70, 0x3F, 0x23, 0x3E, 0xF4, 0xAD, 0x1D, 0x60, 0x74, 0xEE, 0xCB,
-    0x59, 0x37, 0xDE, 0x7C, 0xDB, 0x3B, 0x22, 0x6C, 0xF1, 0xEC, 0x5F, 0xD6,
-    0x9E, 0x50, 0xF8, 0x19, 0x84, 0x80, 0x07, 0xA6, 0x6E, 0x32, 0x77, 0xCE,
-    0xA7, 0xF2, 0x85, 0x40, 0xC2, 0x06, 0x0C, 0xC5, 0xAA, 0xA7, 0x69, 0xA9,
-    0x35, 0x97, 0xD9, 0x61, 0x55, 0xD8, 0xEF, 0xE8, 0x84, 0x34, 0x45, 0xC3,
-    0x2E, 0x7A, 0x44, 0x9E, 0xDC, 0xCA, 0x0B, 0x80, 0xFC, 0xAB, 0x04, 0x5A,
-    0xCD, 0x88, 0x55, 0x10, 0xD3, 0xDB, 0x73, 0xDB, 0xC9, 0x9E, 0x1E, 0x0E,
-    0x05, 0x67, 0xD5, 0xFD, 0xD8, 0x38, 0x3E, 0x71, 0x65, 0x34, 0xC4, 0xC5,
-    0x40, 0x43, 0x67, 0xE3, 0x79, 0xDA, 0x5F, 0x67, 0x4A, 0x3D, 0xB0, 0x8F,
-    0xE7, 0x21, 0x3E, 0x15, 0x20, 0xFF, 0x6D, 0xF1, 0x9E, 0xF8, 0x28, 0x3D,
-    0xF7, 0x40, 0x81, 0x94, 0x68, 0x5A, 0x3D, 0xE9, 0xF7, 0xAD, 0x83, 0xDB,
-    0x2B, 0x9F, 0xE3, 0xE6, 0xF7, 0xD4, 0x02, 0x76, 0xF7, 0x20, 0x15, 0x41,
-    0x34, 0x29, 0x69, 0x94, 0x1C, 0x26, 0x4C, 0xF6, 0x6A, 0xF4, 0x20, 0x33,
-    0x71, 0x24, 0x08, 0xD4, 0x68, 0x00, 0xA1, 0xD4, 0x2E, 0x6B, 0xF4, 0xBC,
-    0x46, 0x45, 0x24, 0x97, 0x2E, 0xF6, 0x39, 0x1E, 0xAF, 0x61, 0x00, 0x50,
-    0xB7, 0xD4, 0xB7, 0x43,
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/randen_slow.cc b/third_party/abseil/absl/random/internal/randen_slow.cc
deleted file mode 100644
index 4e5f3dc..0000000
--- a/third_party/abseil/absl/random/internal/randen_slow.cc
+++ /dev/null
@@ -1,457 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen_slow.h"
-
-#include <cstddef>
-#include <cstdint>
-#include <cstring>
-
-#include "absl/base/attributes.h"
-#include "absl/random/internal/platform.h"
-#include "absl/random/internal/randen_traits.h"
-
-#if ABSL_HAVE_ATTRIBUTE(always_inline) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE \
-  __attribute__((always_inline))
-#elif defined(_MSC_VER)
-// We can achieve something similar to attribute((always_inline)) with MSVC by
-// using the __forceinline keyword, however this is not perfect. MSVC is
-// much less aggressive about inlining, and even with the __forceinline keyword.
-#define ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE __forceinline
-#else
-#define ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE
-#endif
-
-namespace {
-
-// AES portions based on rijndael-alg-fst.c,
-// https://fastcrypto.org/front/misc/rijndael-alg-fst.c
-//
-// Implementation of
-// http://www.csrc.nist.gov/publications/fips/fips197/fips-197.pdf
-constexpr uint32_t te0[256] = {
-    0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd,
-    0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d,
-    0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d,
-    0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b,
-    0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7,
-    0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a,
-    0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4,
-    0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f,
-    0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1,
-    0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d,
-    0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e,
-    0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb,
-    0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e,
-    0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c,
-    0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46,
-    0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a,
-    0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7,
-    0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81,
-    0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe,
-    0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504,
-    0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a,
-    0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f,
-    0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2,
-    0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395,
-    0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e,
-    0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c,
-    0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256,
-    0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4,
-    0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4,
-    0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7,
-    0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa,
-    0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818,
-    0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1,
-    0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21,
-    0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42,
-    0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12,
-    0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158,
-    0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133,
-    0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22,
-    0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a,
-    0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631,
-    0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11,
-    0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a,
-};
-
-constexpr uint32_t te1[256] = {
-    0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b,
-    0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b,
-    0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282,
-    0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0,
-    0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4,
-    0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626,
-    0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5,
-    0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515,
-    0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696,
-    0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2,
-    0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383,
-    0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0,
-    0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3,
-    0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded,
-    0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb,
-    0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf,
-    0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d,
-    0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f,
-    0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3,
-    0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5,
-    0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff,
-    0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec,
-    0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7,
-    0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373,
-    0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a,
-    0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414,
-    0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232,
-    0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c,
-    0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595,
-    0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d,
-    0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656,
-    0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808,
-    0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6,
-    0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f,
-    0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e,
-    0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e,
-    0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1,
-    0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111,
-    0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e,
-    0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf,
-    0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6,
-    0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f,
-    0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616,
-};
-
-constexpr uint32_t te2[256] = {
-    0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b,
-    0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b,
-    0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82,
-    0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0,
-    0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4,
-    0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26,
-    0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5,
-    0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15,
-    0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796,
-    0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2,
-    0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83,
-    0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0,
-    0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3,
-    0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed,
-    0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb,
-    0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf,
-    0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d,
-    0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f,
-    0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3,
-    0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5,
-    0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff,
-    0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec,
-    0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7,
-    0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673,
-    0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a,
-    0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814,
-    0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432,
-    0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c,
-    0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195,
-    0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d,
-    0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56,
-    0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008,
-    0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6,
-    0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f,
-    0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e,
-    0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e,
-    0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1,
-    0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211,
-    0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e,
-    0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df,
-    0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6,
-    0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f,
-    0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16,
-};
-
-constexpr uint32_t te3[256] = {
-    0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6,
-    0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56,
-    0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f,
-    0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb,
-    0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753,
-    0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c,
-    0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451,
-    0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a,
-    0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137,
-    0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf,
-    0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d,
-    0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b,
-    0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd,
-    0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1,
-    0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d,
-    0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85,
-    0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a,
-    0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe,
-    0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d,
-    0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1,
-    0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5,
-    0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3,
-    0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255,
-    0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6,
-    0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54,
-    0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28,
-    0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664,
-    0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8,
-    0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431,
-    0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da,
-    0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac,
-    0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810,
-    0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157,
-    0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e,
-    0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c,
-    0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c,
-    0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899,
-    0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322,
-    0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c,
-    0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5,
-    0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7,
-    0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e,
-    0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c,
-};
-
-// Software implementation of the Vector128 class, using uint32_t
-// as an underlying vector register.
-struct alignas(16) Vector128 {
-  uint32_t s[4];
-};
-
-inline ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE Vector128
-Vector128Load(const void* from) {
-  Vector128 result;
-  const uint8_t* src = reinterpret_cast<const uint8_t*>(from);
-  result.s[0] = static_cast<uint32_t>(src[0]) << 24 |
-                static_cast<uint32_t>(src[1]) << 16 |
-                static_cast<uint32_t>(src[2]) << 8 |
-                static_cast<uint32_t>(src[3]);
-  result.s[1] = static_cast<uint32_t>(src[4]) << 24 |
-                static_cast<uint32_t>(src[5]) << 16 |
-                static_cast<uint32_t>(src[6]) << 8 |
-                static_cast<uint32_t>(src[7]);
-  result.s[2] = static_cast<uint32_t>(src[8]) << 24 |
-                static_cast<uint32_t>(src[9]) << 16 |
-                static_cast<uint32_t>(src[10]) << 8 |
-                static_cast<uint32_t>(src[11]);
-  result.s[3] = static_cast<uint32_t>(src[12]) << 24 |
-                static_cast<uint32_t>(src[13]) << 16 |
-                static_cast<uint32_t>(src[14]) << 8 |
-                static_cast<uint32_t>(src[15]);
-  return result;
-}
-
-inline ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE void Vector128Store(
-    const Vector128& v, void* to) {
-  uint8_t* dst = reinterpret_cast<uint8_t*>(to);
-  dst[0] = static_cast<uint8_t>(v.s[0] >> 24);
-  dst[1] = static_cast<uint8_t>(v.s[0] >> 16);
-  dst[2] = static_cast<uint8_t>(v.s[0] >> 8);
-  dst[3] = static_cast<uint8_t>(v.s[0]);
-  dst[4] = static_cast<uint8_t>(v.s[1] >> 24);
-  dst[5] = static_cast<uint8_t>(v.s[1] >> 16);
-  dst[6] = static_cast<uint8_t>(v.s[1] >> 8);
-  dst[7] = static_cast<uint8_t>(v.s[1]);
-  dst[8] = static_cast<uint8_t>(v.s[2] >> 24);
-  dst[9] = static_cast<uint8_t>(v.s[2] >> 16);
-  dst[10] = static_cast<uint8_t>(v.s[2] >> 8);
-  dst[11] = static_cast<uint8_t>(v.s[2]);
-  dst[12] = static_cast<uint8_t>(v.s[3] >> 24);
-  dst[13] = static_cast<uint8_t>(v.s[3] >> 16);
-  dst[14] = static_cast<uint8_t>(v.s[3] >> 8);
-  dst[15] = static_cast<uint8_t>(v.s[3]);
-}
-
-// One round of AES. "round_key" is a public constant for breaking the
-// symmetry of AES (ensures previously equal columns differ afterwards).
-inline ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE Vector128
-AesRound(const Vector128& state, const Vector128& round_key) {
-  Vector128 result;
-  result.s[0] = round_key.s[0] ^                  //
-                te0[uint8_t(state.s[0] >> 24)] ^  //
-                te1[uint8_t(state.s[1] >> 16)] ^  //
-                te2[uint8_t(state.s[2] >> 8)] ^   //
-                te3[uint8_t(state.s[3])];
-  result.s[1] = round_key.s[1] ^                  //
-                te0[uint8_t(state.s[1] >> 24)] ^  //
-                te1[uint8_t(state.s[2] >> 16)] ^  //
-                te2[uint8_t(state.s[3] >> 8)] ^   //
-                te3[uint8_t(state.s[0])];
-  result.s[2] = round_key.s[2] ^                  //
-                te0[uint8_t(state.s[2] >> 24)] ^  //
-                te1[uint8_t(state.s[3] >> 16)] ^  //
-                te2[uint8_t(state.s[0] >> 8)] ^   //
-                te3[uint8_t(state.s[1])];
-  result.s[3] = round_key.s[3] ^                  //
-                te0[uint8_t(state.s[3] >> 24)] ^  //
-                te1[uint8_t(state.s[0] >> 16)] ^  //
-                te2[uint8_t(state.s[1] >> 8)] ^   //
-                te3[uint8_t(state.s[2])];
-  return result;
-}
-
-using ::absl::random_internal::RandenTraits;
-
-// Randen operates on 128-bit vectors.
-struct alignas(16) u64x2 {
-  uint64_t data[2];
-};
-
-// The improved Feistel block shuffle function for 16 blocks.
-inline ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE void BlockShuffle(
-    u64x2* state) {
-  static_assert(RandenTraits::kFeistelBlocks == 16,
-                "Feistel block shuffle only works for 16 blocks.");
-
-  constexpr size_t shuffle[RandenTraits::kFeistelBlocks] = {
-      7, 2, 13, 4, 11, 8, 3, 6, 15, 0, 9, 10, 1, 14, 5, 12};
-
-  // The fully unrolled loop without the memcpy improves the speed by about
-  // 30% over the equivalent:
-#if 0
-  u64x2 source[RandenTraits::kFeistelBlocks];
-  std::memcpy(source, state, sizeof(source));
-  for (size_t i = 0; i < RandenTraits::kFeistelBlocks; i++) {
-    const u64x2 v0 = source[shuffle[i]];
-    state[i] = v0;
-  }
-  return;
-#endif
-
-  const u64x2 v0 = state[shuffle[0]];
-  const u64x2 v1 = state[shuffle[1]];
-  const u64x2 v2 = state[shuffle[2]];
-  const u64x2 v3 = state[shuffle[3]];
-  const u64x2 v4 = state[shuffle[4]];
-  const u64x2 v5 = state[shuffle[5]];
-  const u64x2 v6 = state[shuffle[6]];
-  const u64x2 v7 = state[shuffle[7]];
-  const u64x2 w0 = state[shuffle[8]];
-  const u64x2 w1 = state[shuffle[9]];
-  const u64x2 w2 = state[shuffle[10]];
-  const u64x2 w3 = state[shuffle[11]];
-  const u64x2 w4 = state[shuffle[12]];
-  const u64x2 w5 = state[shuffle[13]];
-  const u64x2 w6 = state[shuffle[14]];
-  const u64x2 w7 = state[shuffle[15]];
-  state[0] = v0;
-  state[1] = v1;
-  state[2] = v2;
-  state[3] = v3;
-  state[4] = v4;
-  state[5] = v5;
-  state[6] = v6;
-  state[7] = v7;
-  state[8] = w0;
-  state[9] = w1;
-  state[10] = w2;
-  state[11] = w3;
-  state[12] = w4;
-  state[13] = w5;
-  state[14] = w6;
-  state[15] = w7;
-}
-
-// Feistel round function using two AES subrounds. Very similar to F()
-// from Simpira v2, but with independent subround keys. Uses 17 AES rounds
-// per 16 bytes (vs. 10 for AES-CTR). Computing eight round functions in
-// parallel hides the 7-cycle AESNI latency on HSW. Note that the Feistel
-// XORs are 'free' (included in the second AES instruction).
-inline ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE const u64x2* FeistelRound(
-    u64x2* ABSL_RANDOM_INTERNAL_RESTRICT state,
-    const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) {
-  for (size_t branch = 0; branch < RandenTraits::kFeistelBlocks; branch += 4) {
-    const Vector128 s0 = Vector128Load(state + branch);
-    const Vector128 s1 = Vector128Load(state + branch + 1);
-    const Vector128 f0 = AesRound(s0, Vector128Load(keys));
-    keys++;
-    const Vector128 o1 = AesRound(f0, s1);
-    Vector128Store(o1, state + branch + 1);
-
-    // Manually unroll this loop once. about 10% better than not unrolled.
-    const Vector128 s2 = Vector128Load(state + branch + 2);
-    const Vector128 s3 = Vector128Load(state + branch + 3);
-    const Vector128 f2 = AesRound(s2, Vector128Load(keys));
-    keys++;
-    const Vector128 o3 = AesRound(f2, s3);
-    Vector128Store(o3, state + branch + 3);
-  }
-  return keys;
-}
-
-// Cryptographic permutation based via type-2 Generalized Feistel Network.
-// Indistinguishable from ideal by chosen-ciphertext adversaries using less than
-// 2^64 queries if the round function is a PRF. This is similar to the b=8 case
-// of Simpira v2, but more efficient than its generic construction for b=16.
-inline ABSL_RANDOM_INTERNAL_ATTRIBUTE_ALWAYS_INLINE void Permute(
-    u64x2* state, const u64x2* ABSL_RANDOM_INTERNAL_RESTRICT keys) {
-  for (size_t round = 0; round < RandenTraits::kFeistelRounds; ++round) {
-    keys = FeistelRound(state, keys);
-    BlockShuffle(state);
-  }
-}
-
-}  // namespace
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-const void* RandenSlow::GetKeys() {
-  // Round keys for one AES per Feistel round and branch.
-  // The canonical implementation uses first digits of Pi.
-  return kRandenRoundKeys;
-}
-
-void RandenSlow::Absorb(const void* seed_void, void* state_void) {
-  auto* state =
-      reinterpret_cast<uint64_t * ABSL_RANDOM_INTERNAL_RESTRICT>(state_void);
-  const auto* seed =
-      reinterpret_cast<const uint64_t * ABSL_RANDOM_INTERNAL_RESTRICT>(
-          seed_void);
-
-  constexpr size_t kCapacityBlocks =
-      RandenTraits::kCapacityBytes / sizeof(uint64_t);
-  static_assert(
-      kCapacityBlocks * sizeof(uint64_t) == RandenTraits::kCapacityBytes,
-      "Not i*V");
-
-  for (size_t i = kCapacityBlocks;
-       i < RandenTraits::kStateBytes / sizeof(uint64_t); ++i) {
-    state[i] ^= seed[i - kCapacityBlocks];
-  }
-}
-
-void RandenSlow::Generate(const void* keys_void, void* state_void) {
-  static_assert(RandenTraits::kCapacityBytes == sizeof(u64x2),
-                "Capacity mismatch");
-
-  auto* state = reinterpret_cast<u64x2*>(state_void);
-  const auto* keys = reinterpret_cast<const u64x2*>(keys_void);
-
-  const u64x2 prev_inner = state[0];
-
-  Permute(state, keys);
-
-  // Ensure backtracking resistance.
-  state[0].data[0] ^= prev_inner.data[0];
-  state[0].data[1] ^= prev_inner.data[1];
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/randen_slow.h b/third_party/abseil/absl/random/internal/randen_slow.h
deleted file mode 100644
index 532c3a8..0000000
--- a/third_party/abseil/absl/random/internal/randen_slow.h
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_
-
-#include <cstddef>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RANDen = RANDom generator or beetroots in Swiss High German.
-// RandenSlow implements the basic state manipulation methods for
-// architectures lacking AES hardware acceleration intrinsics.
-class RandenSlow {
- public:
-  static void Generate(const void* keys, void* state_void);
-  static void Absorb(const void* seed_void, void* state_void);
-  static const void* GetKeys();
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_
diff --git a/third_party/abseil/absl/random/internal/randen_slow_test.cc b/third_party/abseil/absl/random/internal/randen_slow_test.cc
deleted file mode 100644
index 4a53583..0000000
--- a/third_party/abseil/absl/random/internal/randen_slow_test.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen_slow.h"
-
-#include <cstring>
-
-#include "gtest/gtest.h"
-#include "absl/random/internal/randen_traits.h"
-
-namespace {
-
-using absl::random_internal::RandenSlow;
-using absl::random_internal::RandenTraits;
-
-// Local state parameters.
-constexpr size_t kSeedBytes =
-    RandenTraits::kStateBytes - RandenTraits::kCapacityBytes;
-constexpr size_t kStateSizeT = RandenTraits::kStateBytes / sizeof(uint64_t);
-constexpr size_t kSeedSizeT = kSeedBytes / sizeof(uint32_t);
-
-struct alignas(16) randen {
-  uint64_t state[kStateSizeT];
-  uint32_t seed[kSeedSizeT];
-};
-
-TEST(RandenSlowTest, Default) {
-  constexpr uint64_t kGolden[] = {
-      0x6c6534090ee6d3ee, 0x044e2b9b9d5333c6, 0xc3c14f134e433977,
-      0xdda9f47cd90410ee, 0x887bf3087fd8ca10, 0xf0b780f545c72912,
-      0x15dbb1d37696599f, 0x30ec63baff3c6d59, 0xb29f73606f7f20a6,
-      0x02808a316f49a54c, 0x3b8feaf9d5c8e50e, 0x9cbf605e3fd9de8a,
-      0xc970ae1a78183bbb, 0xd8b2ffd356301ed5, 0xf4b327fe0fc73c37,
-      0xcdfd8d76eb8f9a19, 0xc3a506eb91420c9d, 0xd5af05dd3eff9556,
-      0x48db1bb78f83c4a1, 0x7023920e0d6bfe8c, 0x58d3575834956d42,
-      0xed1ef4c26b87b840, 0x8eef32a23e0b2df3, 0x497cabf3431154fc,
-      0x4e24370570029a8b, 0xd88b5749f090e5ea, 0xc651a582a970692f,
-      0x78fcec2cbb6342f5, 0x463cb745612f55db, 0x352ee4ad1816afe3,
-      0x026ff374c101da7e, 0x811ef0821c3de851,
-  };
-
-  alignas(16) randen d;
-  std::memset(d.state, 0, sizeof(d.state));
-  RandenSlow::Generate(RandenSlow::GetKeys(), d.state);
-
-  uint64_t* id = d.state;
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, *id++);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/randen_test.cc b/third_party/abseil/absl/random/internal/randen_test.cc
deleted file mode 100644
index c186fe0..0000000
--- a/third_party/abseil/absl/random/internal/randen_test.cc
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/randen.h"
-
-#include <cstring>
-
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-
-namespace {
-
-using absl::random_internal::Randen;
-
-// Local state parameters.
-constexpr size_t kStateSizeT = Randen::kStateBytes / sizeof(uint64_t);
-
-TEST(RandenTest, CopyAndMove) {
-  static_assert(std::is_copy_constructible<Randen>::value,
-                "Randen must be copy constructible");
-
-  static_assert(absl::is_copy_assignable<Randen>::value,
-                "Randen must be copy assignable");
-
-  static_assert(std::is_move_constructible<Randen>::value,
-                "Randen must be move constructible");
-
-  static_assert(absl::is_move_assignable<Randen>::value,
-                "Randen must be move assignable");
-}
-
-TEST(RandenTest, Default) {
-  constexpr uint64_t kGolden[] = {
-      0x6c6534090ee6d3ee, 0x044e2b9b9d5333c6, 0xc3c14f134e433977,
-      0xdda9f47cd90410ee, 0x887bf3087fd8ca10, 0xf0b780f545c72912,
-      0x15dbb1d37696599f, 0x30ec63baff3c6d59, 0xb29f73606f7f20a6,
-      0x02808a316f49a54c, 0x3b8feaf9d5c8e50e, 0x9cbf605e3fd9de8a,
-      0xc970ae1a78183bbb, 0xd8b2ffd356301ed5, 0xf4b327fe0fc73c37,
-      0xcdfd8d76eb8f9a19, 0xc3a506eb91420c9d, 0xd5af05dd3eff9556,
-      0x48db1bb78f83c4a1, 0x7023920e0d6bfe8c, 0x58d3575834956d42,
-      0xed1ef4c26b87b840, 0x8eef32a23e0b2df3, 0x497cabf3431154fc,
-      0x4e24370570029a8b, 0xd88b5749f090e5ea, 0xc651a582a970692f,
-      0x78fcec2cbb6342f5, 0x463cb745612f55db, 0x352ee4ad1816afe3,
-      0x026ff374c101da7e, 0x811ef0821c3de851,
-  };
-
-  alignas(16) uint64_t state[kStateSizeT];
-  std::memset(state, 0, sizeof(state));
-
-  Randen r;
-  r.Generate(state);
-
-  auto id = std::begin(state);
-  for (const auto& elem : kGolden) {
-    EXPECT_EQ(elem, *id++);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/randen_traits.h b/third_party/abseil/absl/random/internal/randen_traits.h
deleted file mode 100644
index 120022c..0000000
--- a/third_party/abseil/absl/random/internal/randen_traits.h
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_TRAITS_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_TRAITS_H_
-
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
-// symbols from arbitrary system and other headers, since it may be built
-// with different flags from other targets, using different levels of
-// optimization, potentially introducing ODR violations.
-
-#include <cstddef>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RANDen = RANDom generator or beetroots in Swiss High German.
-// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
-// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
-//
-// High-level summary:
-// 1) Reverie (see "A Robust and Sponge-Like PRNG with Improved Efficiency") is
-//    a sponge-like random generator that requires a cryptographic permutation.
-//    It improves upon "Provably Robust Sponge-Based PRNGs and KDFs" by
-//    achieving backtracking resistance with only one Permute() per buffer.
-//
-// 2) "Simpira v2: A Family of Efficient Permutations Using the AES Round
-//    Function" constructs up to 1024-bit permutations using an improved
-//    Generalized Feistel network with 2-round AES-128 functions. This Feistel
-//    block shuffle achieves diffusion faster and is less vulnerable to
-//    sliced-biclique attacks than the Type-2 cyclic shuffle.
-//
-// 3) "Improving the Generalized Feistel" and "New criterion for diffusion
-//    property" extends the same kind of improved Feistel block shuffle to 16
-//    branches, which enables a 2048-bit permutation.
-//
-// Combine these three ideas and also change Simpira's subround keys from
-// structured/low-entropy counters to digits of Pi (or other random source).
-
-// RandenTraits contains the basic algorithm traits, such as the size of the
-// state, seed, sponge, etc.
-struct RandenTraits {
-  // Size of the entire sponge / state for the randen PRNG.
-  static constexpr size_t kStateBytes = 256;  // 2048-bit
-
-  // Size of the 'inner' (inaccessible) part of the sponge. Larger values would
-  // require more frequent calls to RandenGenerate.
-  static constexpr size_t kCapacityBytes = 16;  // 128-bit
-
-  // Size of the default seed consumed by the sponge.
-  static constexpr size_t kSeedBytes = kStateBytes - kCapacityBytes;
-
-  // Assuming 128-bit blocks, the number of blocks in the state.
-  // Largest size for which security proofs are known.
-  static constexpr size_t kFeistelBlocks = 16;
-
-  // Ensures SPRP security and two full subblock diffusions.
-  // Must be > 4 * log2(kFeistelBlocks).
-  static constexpr size_t kFeistelRounds = 16 + 1;
-
-  // Size of the key. A 128-bit key block is used for every-other
-  // feistel block (Type-2 generalized Feistel network) in each round.
-  static constexpr size_t kKeyBytes = 16 * kFeistelRounds * kFeistelBlocks / 2;
-};
-
-// Randen key arrays. In randen_round_keys.cc
-extern const unsigned char kRandenRoundKeys[RandenTraits::kKeyBytes];
-extern const unsigned char kRandenRoundKeysBE[RandenTraits::kKeyBytes];
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_TRAITS_H_
diff --git a/third_party/abseil/absl/random/internal/salted_seed_seq.h b/third_party/abseil/absl/random/internal/salted_seed_seq.h
deleted file mode 100644
index 5953a09..0000000
--- a/third_party/abseil/absl/random/internal/salted_seed_seq.h
+++ /dev/null
@@ -1,167 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_SALTED_SEED_SEQ_H_
-#define ABSL_RANDOM_INTERNAL_SALTED_SEED_SEQ_H_
-
-#include <cstdint>
-#include <cstdlib>
-#include <initializer_list>
-#include <iterator>
-#include <memory>
-#include <type_traits>
-#include <utility>
-
-#include "absl/container/inlined_vector.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/seed_material.h"
-#include "absl/types/optional.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// This class conforms to the C++ Standard "Seed Sequence" concept
-// [rand.req.seedseq].
-//
-// A `SaltedSeedSeq` is meant to wrap an existing seed sequence and modify
-// generated sequence by mixing with extra entropy. This entropy may be
-// build-dependent or process-dependent. The implementation may change to be
-// have either or both kinds of entropy. If salt is not available sequence is
-// not modified.
-template <typename SSeq>
-class SaltedSeedSeq {
- public:
-  using inner_sequence_type = SSeq;
-  using result_type = typename SSeq::result_type;
-
-  SaltedSeedSeq() : seq_(absl::make_unique<SSeq>()) {}
-
-  template <typename Iterator>
-  SaltedSeedSeq(Iterator begin, Iterator end)
-      : seq_(absl::make_unique<SSeq>(begin, end)) {}
-
-  template <typename T>
-  SaltedSeedSeq(std::initializer_list<T> il)
-      : SaltedSeedSeq(il.begin(), il.end()) {}
-
-  SaltedSeedSeq(const SaltedSeedSeq&) = delete;
-  SaltedSeedSeq& operator=(const SaltedSeedSeq&) = delete;
-
-  SaltedSeedSeq(SaltedSeedSeq&&) = default;
-  SaltedSeedSeq& operator=(SaltedSeedSeq&&) = default;
-
-  template <typename RandomAccessIterator>
-  void generate(RandomAccessIterator begin, RandomAccessIterator end) {
-    // The common case is that generate is called with ContiguousIterators
-    // to uint arrays. Such contiguous memory regions may be optimized,
-    // which we detect here.
-    using tag = absl::conditional_t<
-        (std::is_pointer<RandomAccessIterator>::value &&
-         std::is_same<absl::decay_t<decltype(*begin)>, uint32_t>::value),
-        ContiguousAndUint32Tag, DefaultTag>;
-    if (begin != end) {
-      generate_impl(begin, end, tag{});
-    }
-  }
-
-  template <typename OutIterator>
-  void param(OutIterator out) const {
-    seq_->param(out);
-  }
-
-  size_t size() const { return seq_->size(); }
-
- private:
-  struct ContiguousAndUint32Tag {};
-  struct DefaultTag {};
-
-  // Generate which requires the iterators are contiguous pointers to uint32_t.
-  void generate_impl(uint32_t* begin, uint32_t* end, ContiguousAndUint32Tag) {
-    generate_contiguous(absl::MakeSpan(begin, end));
-  }
-
-  // The uncommon case for generate is that it is called with iterators over
-  // some other buffer type which is assignable from a 32-bit value. In this
-  // case we allocate a temporary 32-bit buffer and then copy-assign back
-  // to the initial inputs.
-  template <typename RandomAccessIterator>
-  void generate_impl(RandomAccessIterator begin, RandomAccessIterator end,
-                     DefaultTag) {
-    return generate_and_copy(std::distance(begin, end), begin);
-  }
-
-  // Fills the initial seed buffer the underlying SSeq::generate() call,
-  // mixing in the salt material.
-  void generate_contiguous(absl::Span<uint32_t> buffer) {
-    seq_->generate(buffer.begin(), buffer.end());
-    const uint32_t salt = absl::random_internal::GetSaltMaterial().value_or(0);
-    MixIntoSeedMaterial(absl::MakeConstSpan(&salt, 1), buffer);
-  }
-
-  // Allocates a seed buffer of `n` elements, generates the seed, then
-  // copies the result into the `out` iterator.
-  template <typename Iterator>
-  void generate_and_copy(size_t n, Iterator out) {
-    // Allocate a temporary buffer, generate, and then copy.
-    absl::InlinedVector<uint32_t, 8> data(n, 0);
-    generate_contiguous(absl::MakeSpan(data.data(), data.size()));
-    std::copy(data.begin(), data.end(), out);
-  }
-
-  // Because [rand.req.seedseq] is not required to be copy-constructible,
-  // copy-assignable nor movable, we wrap it with unique pointer to be able
-  // to move SaltedSeedSeq.
-  std::unique_ptr<SSeq> seq_;
-};
-
-// is_salted_seed_seq indicates whether the type is a SaltedSeedSeq.
-template <typename T, typename = void>
-struct is_salted_seed_seq : public std::false_type {};
-
-template <typename T>
-struct is_salted_seed_seq<
-    T, typename std::enable_if<std::is_same<
-           T, SaltedSeedSeq<typename T::inner_sequence_type>>::value>::type>
-    : public std::true_type {};
-
-// MakeSaltedSeedSeq returns a salted variant of the seed sequence.
-// When provided with an existing SaltedSeedSeq, returns the input parameter,
-// otherwise constructs a new SaltedSeedSeq which embodies the original
-// non-salted seed parameters.
-template <
-    typename SSeq,  //
-    typename EnableIf = absl::enable_if_t<is_salted_seed_seq<SSeq>::value>>
-SSeq MakeSaltedSeedSeq(SSeq&& seq) {
-  return SSeq(std::forward<SSeq>(seq));
-}
-
-template <
-    typename SSeq,  //
-    typename EnableIf = absl::enable_if_t<!is_salted_seed_seq<SSeq>::value>>
-SaltedSeedSeq<typename std::decay<SSeq>::type> MakeSaltedSeedSeq(SSeq&& seq) {
-  using sseq_type = typename std::decay<SSeq>::type;
-  using result_type = typename sseq_type::result_type;
-
-  absl::InlinedVector<result_type, 8> data;
-  seq.param(std::back_inserter(data));
-  return SaltedSeedSeq<sseq_type>(data.begin(), data.end());
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_SALTED_SEED_SEQ_H_
diff --git a/third_party/abseil/absl/random/internal/salted_seed_seq_test.cc b/third_party/abseil/absl/random/internal/salted_seed_seq_test.cc
deleted file mode 100644
index 0bf19a6..0000000
--- a/third_party/abseil/absl/random/internal/salted_seed_seq_test.cc
+++ /dev/null
@@ -1,168 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/salted_seed_seq.h"
-
-#include <iterator>
-#include <random>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-using absl::random_internal::GetSaltMaterial;
-using absl::random_internal::MakeSaltedSeedSeq;
-using absl::random_internal::SaltedSeedSeq;
-using testing::Eq;
-using testing::Pointwise;
-
-namespace {
-
-template <typename Sseq>
-void ConformsToInterface() {
-  // Check that the SeedSequence can be default-constructed.
-  { Sseq default_constructed_seq; }
-  // Check that the SeedSequence can be constructed with two iterators.
-  {
-    uint32_t init_array[] = {1, 3, 5, 7, 9};
-    Sseq iterator_constructed_seq(std::begin(init_array), std::end(init_array));
-  }
-  // Check that the SeedSequence can be std::initializer_list-constructed.
-  { Sseq list_constructed_seq = {1, 3, 5, 7, 9, 11, 13}; }
-  // Check that param() and size() return state provided to constructor.
-  {
-    uint32_t init_array[] = {1, 2, 3, 4, 5};
-    Sseq seq(std::begin(init_array), std::end(init_array));
-    EXPECT_EQ(seq.size(), ABSL_ARRAYSIZE(init_array));
-
-    std::vector<uint32_t> state_vector;
-    seq.param(std::back_inserter(state_vector));
-
-    EXPECT_EQ(state_vector.size(), ABSL_ARRAYSIZE(init_array));
-    for (int i = 0; i < state_vector.size(); i++) {
-      EXPECT_EQ(state_vector[i], i + 1);
-    }
-  }
-  // Check for presence of generate() method.
-  {
-    Sseq seq;
-    uint32_t seeds[5];
-
-    seq.generate(std::begin(seeds), std::end(seeds));
-  }
-}
-
-TEST(SaltedSeedSeq, CheckInterfaces) {
-  // Control case
-  ConformsToInterface<std::seed_seq>();
-
-  // Abseil classes
-  ConformsToInterface<SaltedSeedSeq<std::seed_seq>>();
-}
-
-TEST(SaltedSeedSeq, CheckConstructingFromOtherSequence) {
-  std::vector<uint32_t> seed_values(10, 1);
-  std::seed_seq seq(seed_values.begin(), seed_values.end());
-  auto salted_seq = MakeSaltedSeedSeq(std::move(seq));
-
-  EXPECT_EQ(seq.size(), salted_seq.size());
-
-  std::vector<uint32_t> param_result;
-  seq.param(std::back_inserter(param_result));
-
-  EXPECT_EQ(seed_values, param_result);
-}
-
-TEST(SaltedSeedSeq, SaltedSaltedSeedSeqIsNotDoubleSalted) {
-  uint32_t init[] = {1, 3, 5, 7, 9};
-
-  std::seed_seq seq(std::begin(init), std::end(init));
-
-  // The first salting.
-  SaltedSeedSeq<std::seed_seq> salted_seq = MakeSaltedSeedSeq(std::move(seq));
-  uint32_t a[16];
-  salted_seq.generate(std::begin(a), std::end(a));
-
-  // The second salting.
-  SaltedSeedSeq<std::seed_seq> salted_salted_seq =
-      MakeSaltedSeedSeq(std::move(salted_seq));
-  uint32_t b[16];
-  salted_salted_seq.generate(std::begin(b), std::end(b));
-
-  // ... both should be equal.
-  EXPECT_THAT(b, Pointwise(Eq(), a)) << "a[0] " << a[0];
-}
-
-TEST(SaltedSeedSeq, SeedMaterialIsSalted) {
-  const size_t kNumBlocks = 16;
-
-  uint32_t seed_material[kNumBlocks];
-  std::random_device urandom{"/dev/urandom"};
-  for (uint32_t& seed : seed_material) {
-    seed = urandom();
-  }
-
-  std::seed_seq seq(std::begin(seed_material), std::end(seed_material));
-  SaltedSeedSeq<std::seed_seq> salted_seq(std::begin(seed_material),
-                                          std::end(seed_material));
-
-  bool salt_is_available = GetSaltMaterial().has_value();
-
-  // If salt is available generated sequence should be different.
-  if (salt_is_available) {
-    uint32_t outputs[kNumBlocks];
-    uint32_t salted_outputs[kNumBlocks];
-
-    seq.generate(std::begin(outputs), std::end(outputs));
-    salted_seq.generate(std::begin(salted_outputs), std::end(salted_outputs));
-
-    EXPECT_THAT(outputs, Pointwise(testing::Ne(), salted_outputs));
-  }
-}
-
-TEST(SaltedSeedSeq, GenerateAcceptsDifferentTypes) {
-  const size_t kNumBlocks = 4;
-
-  SaltedSeedSeq<std::seed_seq> seq({1, 2, 3});
-
-  uint32_t expected[kNumBlocks];
-  seq.generate(std::begin(expected), std::end(expected));
-
-  // 32-bit outputs
-  {
-    unsigned long seed_material[kNumBlocks];  // NOLINT(runtime/int)
-    seq.generate(std::begin(seed_material), std::end(seed_material));
-    EXPECT_THAT(seed_material, Pointwise(Eq(), expected));
-  }
-  {
-    unsigned int seed_material[kNumBlocks];  // NOLINT(runtime/int)
-    seq.generate(std::begin(seed_material), std::end(seed_material));
-    EXPECT_THAT(seed_material, Pointwise(Eq(), expected));
-  }
-
-  // 64-bit outputs.
-  {
-    uint64_t seed_material[kNumBlocks];
-    seq.generate(std::begin(seed_material), std::end(seed_material));
-    EXPECT_THAT(seed_material, Pointwise(Eq(), expected));
-  }
-  {
-    int64_t seed_material[kNumBlocks];
-    seq.generate(std::begin(seed_material), std::end(seed_material));
-    EXPECT_THAT(seed_material, Pointwise(Eq(), expected));
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/seed_material.cc b/third_party/abseil/absl/random/internal/seed_material.cc
deleted file mode 100644
index 4d38a57..0000000
--- a/third_party/abseil/absl/random/internal/seed_material.cc
+++ /dev/null
@@ -1,219 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/seed_material.h"
-
-#include <fcntl.h>
-
-#ifndef _WIN32
-#include <unistd.h>
-#else
-#include <io.h>
-#endif
-
-#include <algorithm>
-#include <cerrno>
-#include <cstdint>
-#include <cstdlib>
-#include <cstring>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/escaping.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-
-#if defined(__native_client__)
-
-#include <nacl/nacl_random.h>
-#define ABSL_RANDOM_USE_NACL_SECURE_RANDOM 1
-
-#elif defined(_WIN32)
-
-#include <windows.h>
-#define ABSL_RANDOM_USE_BCRYPT 1
-#pragma comment(lib, "bcrypt.lib")
-
-#elif defined(__Fuchsia__)
-#include <zircon/syscalls.h>
-
-#endif
-
-#if defined(ABSL_RANDOM_USE_BCRYPT)
-#include <bcrypt.h>
-
-#ifndef BCRYPT_SUCCESS
-#define BCRYPT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
-#endif
-// Also link bcrypt; this can be done via linker options or:
-// #pragma comment(lib, "bcrypt.lib")
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-// Read OS Entropy for random number seeds.
-// TODO(absl-team): Possibly place a cap on how much entropy may be read at a
-// time.
-
-#if defined(ABSL_RANDOM_USE_BCRYPT)
-
-// On Windows potentially use the BCRYPT CNG API to read available entropy.
-bool ReadSeedMaterialFromOSEntropyImpl(absl::Span<uint32_t> values) {
-  BCRYPT_ALG_HANDLE hProvider;
-  NTSTATUS ret;
-  ret = BCryptOpenAlgorithmProvider(&hProvider, BCRYPT_RNG_ALGORITHM,
-                                    MS_PRIMITIVE_PROVIDER, 0);
-  if (!(BCRYPT_SUCCESS(ret))) {
-    ABSL_RAW_LOG(ERROR, "Failed to open crypto provider.");
-    return false;
-  }
-  ret = BCryptGenRandom(
-      hProvider,                                             // provider
-      reinterpret_cast<UCHAR*>(values.data()),               // buffer
-      static_cast<ULONG>(sizeof(uint32_t) * values.size()),  // bytes
-      0);                                                    // flags
-  BCryptCloseAlgorithmProvider(hProvider, 0);
-  return BCRYPT_SUCCESS(ret);
-}
-
-#elif defined(ABSL_RANDOM_USE_NACL_SECURE_RANDOM)
-
-// On NaCL use nacl_secure_random to acquire bytes.
-bool ReadSeedMaterialFromOSEntropyImpl(absl::Span<uint32_t> values) {
-  auto buffer = reinterpret_cast<uint8_t*>(values.data());
-  size_t buffer_size = sizeof(uint32_t) * values.size();
-
-  uint8_t* output_ptr = buffer;
-  while (buffer_size > 0) {
-    size_t nread = 0;
-    const int error = nacl_secure_random(output_ptr, buffer_size, &nread);
-    if (error != 0 || nread > buffer_size) {
-      ABSL_RAW_LOG(ERROR, "Failed to read secure_random seed data: %d", error);
-      return false;
-    }
-    output_ptr += nread;
-    buffer_size -= nread;
-  }
-  return true;
-}
-
-#elif defined(__Fuchsia__)
-
-bool ReadSeedMaterialFromOSEntropyImpl(absl::Span<uint32_t> values) {
-  auto buffer = reinterpret_cast<uint8_t*>(values.data());
-  size_t buffer_size = sizeof(uint32_t) * values.size();
-  zx_cprng_draw(buffer, buffer_size);
-  return true;
-}
-
-#else
-
-// On *nix, read entropy from /dev/urandom.
-bool ReadSeedMaterialFromOSEntropyImpl(absl::Span<uint32_t> values) {
-  const char kEntropyFile[] = "/dev/urandom";
-
-  auto buffer = reinterpret_cast<uint8_t*>(values.data());
-  size_t buffer_size = sizeof(uint32_t) * values.size();
-
-  int dev_urandom = open(kEntropyFile, O_RDONLY);
-  bool success = (-1 != dev_urandom);
-  if (!success) {
-    return false;
-  }
-
-  while (success && buffer_size > 0) {
-    int bytes_read = read(dev_urandom, buffer, buffer_size);
-    int read_error = errno;
-    success = (bytes_read > 0);
-    if (success) {
-      buffer += bytes_read;
-      buffer_size -= bytes_read;
-    } else if (bytes_read == -1 && read_error == EINTR) {
-      success = true;  // Need to try again.
-    }
-  }
-  close(dev_urandom);
-  return success;
-}
-
-#endif
-
-}  // namespace
-
-bool ReadSeedMaterialFromOSEntropy(absl::Span<uint32_t> values) {
-  assert(values.data() != nullptr);
-  if (values.data() == nullptr) {
-    return false;
-  }
-  if (values.empty()) {
-    return true;
-  }
-  return ReadSeedMaterialFromOSEntropyImpl(values);
-}
-
-void MixIntoSeedMaterial(absl::Span<const uint32_t> sequence,
-                         absl::Span<uint32_t> seed_material) {
-  // Algorithm is based on code available at
-  // https://gist.github.com/imneme/540829265469e673d045
-  constexpr uint32_t kInitVal = 0x43b0d7e5;
-  constexpr uint32_t kHashMul = 0x931e8875;
-  constexpr uint32_t kMixMulL = 0xca01f9dd;
-  constexpr uint32_t kMixMulR = 0x4973f715;
-  constexpr uint32_t kShiftSize = sizeof(uint32_t) * 8 / 2;
-
-  uint32_t hash_const = kInitVal;
-  auto hash = [&](uint32_t value) {
-    value ^= hash_const;
-    hash_const *= kHashMul;
-    value *= hash_const;
-    value ^= value >> kShiftSize;
-    return value;
-  };
-
-  auto mix = [&](uint32_t x, uint32_t y) {
-    uint32_t result = kMixMulL * x - kMixMulR * y;
-    result ^= result >> kShiftSize;
-    return result;
-  };
-
-  for (const auto& seq_val : sequence) {
-    for (auto& elem : seed_material) {
-      elem = mix(elem, hash(seq_val));
-    }
-  }
-}
-
-absl::optional<uint32_t> GetSaltMaterial() {
-  // Salt must be common for all generators within the same process so read it
-  // only once and store in static variable.
-  static const auto salt_material = []() -> absl::optional<uint32_t> {
-    uint32_t salt_value = 0;
-
-    if (random_internal::ReadSeedMaterialFromOSEntropy(
-            MakeSpan(&salt_value, 1))) {
-      return salt_value;
-    }
-
-    return absl::nullopt;
-  }();
-
-  return salt_material;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/internal/seed_material.h b/third_party/abseil/absl/random/internal/seed_material.h
deleted file mode 100644
index 4be10e9..0000000
--- a/third_party/abseil/absl/random/internal/seed_material.h
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_SEED_MATERIAL_H_
-#define ABSL_RANDOM_INTERNAL_SEED_MATERIAL_H_
-
-#include <cassert>
-#include <cstdint>
-#include <cstdlib>
-#include <string>
-#include <vector>
-
-#include "absl/base/attributes.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/types/optional.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Returns the number of 32-bit blocks needed to contain the given number of
-// bits.
-constexpr size_t SeedBitsToBlocks(size_t seed_size) {
-  return (seed_size + 31) / 32;
-}
-
-// Amount of entropy (measured in bits) used to instantiate a Seed Sequence,
-// with which to create a URBG.
-constexpr size_t kEntropyBitsNeeded = 256;
-
-// Amount of entropy (measured in 32-bit blocks) used to instantiate a Seed
-// Sequence, with which to create a URBG.
-constexpr size_t kEntropyBlocksNeeded =
-    random_internal::SeedBitsToBlocks(kEntropyBitsNeeded);
-
-static_assert(kEntropyBlocksNeeded > 0,
-              "Entropy used to seed URBGs must be nonzero.");
-
-// Attempts to fill a span of uint32_t-values using an OS-provided source of
-// true entropy (eg. /dev/urandom) into an array of uint32_t blocks of data. The
-// resulting array may be used to initialize an instance of a class conforming
-// to the C++ Standard "Seed Sequence" concept [rand.req.seedseq].
-//
-// If values.data() == nullptr, the behavior is undefined.
-ABSL_MUST_USE_RESULT
-bool ReadSeedMaterialFromOSEntropy(absl::Span<uint32_t> values);
-
-// Attempts to fill a span of uint32_t-values using variates generated by an
-// existing instance of a class conforming to the C++ Standard "Uniform Random
-// Bit Generator" concept [rand.req.urng]. The resulting data may be used to
-// initialize an instance of a class conforming to the C++ Standard
-// "Seed Sequence" concept [rand.req.seedseq].
-//
-// If urbg == nullptr or values.data() == nullptr, the behavior is undefined.
-template <typename URBG>
-ABSL_MUST_USE_RESULT bool ReadSeedMaterialFromURBG(
-    URBG* urbg, absl::Span<uint32_t> values) {
-  random_internal::FastUniformBits<uint32_t> distr;
-
-  assert(urbg != nullptr && values.data() != nullptr);
-  if (urbg == nullptr || values.data() == nullptr) {
-    return false;
-  }
-
-  for (uint32_t& seed_value : values) {
-    seed_value = distr(*urbg);
-  }
-  return true;
-}
-
-// Mixes given sequence of values with into given sequence of seed material.
-// Time complexity of this function is O(sequence.size() *
-// seed_material.size()).
-//
-// Algorithm is based on code available at
-// https://gist.github.com/imneme/540829265469e673d045
-// by Melissa O'Neill.
-void MixIntoSeedMaterial(absl::Span<const uint32_t> sequence,
-                         absl::Span<uint32_t> seed_material);
-
-// Returns salt value.
-//
-// Salt is obtained only once and stored in static variable.
-//
-// May return empty value if optaining the salt was not possible.
-absl::optional<uint32_t> GetSaltMaterial();
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_SEED_MATERIAL_H_
diff --git a/third_party/abseil/absl/random/internal/seed_material_test.cc b/third_party/abseil/absl/random/internal/seed_material_test.cc
deleted file mode 100644
index 6db2820..0000000
--- a/third_party/abseil/absl/random/internal/seed_material_test.cc
+++ /dev/null
@@ -1,202 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/seed_material.h"
-
-#include <bitset>
-#include <cstdlib>
-#include <cstring>
-#include <random>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-#ifdef __ANDROID__
-// Android assert messages only go to system log, so death tests cannot inspect
-// the message for matching.
-#define ABSL_EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-  EXPECT_DEATH_IF_SUPPORTED(statement, ".*")
-#else
-#define ABSL_EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-  EXPECT_DEATH_IF_SUPPORTED(statement, regex)
-#endif
-
-namespace {
-
-using testing::Each;
-using testing::ElementsAre;
-using testing::Eq;
-using testing::Ne;
-using testing::Pointwise;
-
-TEST(SeedBitsToBlocks, VerifyCases) {
-  EXPECT_EQ(0, absl::random_internal::SeedBitsToBlocks(0));
-  EXPECT_EQ(1, absl::random_internal::SeedBitsToBlocks(1));
-  EXPECT_EQ(1, absl::random_internal::SeedBitsToBlocks(31));
-  EXPECT_EQ(1, absl::random_internal::SeedBitsToBlocks(32));
-  EXPECT_EQ(2, absl::random_internal::SeedBitsToBlocks(33));
-  EXPECT_EQ(4, absl::random_internal::SeedBitsToBlocks(127));
-  EXPECT_EQ(4, absl::random_internal::SeedBitsToBlocks(128));
-  EXPECT_EQ(5, absl::random_internal::SeedBitsToBlocks(129));
-}
-
-TEST(ReadSeedMaterialFromOSEntropy, SuccessiveReadsAreDistinct) {
-  constexpr size_t kSeedMaterialSize = 64;
-  uint32_t seed_material_1[kSeedMaterialSize] = {};
-  uint32_t seed_material_2[kSeedMaterialSize] = {};
-
-  EXPECT_TRUE(absl::random_internal::ReadSeedMaterialFromOSEntropy(
-      absl::Span<uint32_t>(seed_material_1, kSeedMaterialSize)));
-  EXPECT_TRUE(absl::random_internal::ReadSeedMaterialFromOSEntropy(
-      absl::Span<uint32_t>(seed_material_2, kSeedMaterialSize)));
-
-  EXPECT_THAT(seed_material_1, Pointwise(Ne(), seed_material_2));
-}
-
-TEST(ReadSeedMaterialFromOSEntropy, ReadZeroBytesIsNoOp) {
-  uint32_t seed_material[32] = {};
-  std::memset(seed_material, 0xAA, sizeof(seed_material));
-  EXPECT_TRUE(absl::random_internal::ReadSeedMaterialFromOSEntropy(
-      absl::Span<uint32_t>(seed_material, 0)));
-
-  EXPECT_THAT(seed_material, Each(Eq(0xAAAAAAAA)));
-}
-
-TEST(ReadSeedMaterialFromOSEntropy, NullPtrVectorArgument) {
-#ifdef NDEBUG
-  EXPECT_FALSE(absl::random_internal::ReadSeedMaterialFromOSEntropy(
-      absl::Span<uint32_t>(nullptr, 32)));
-#else
-  bool result;
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(
-      result = absl::random_internal::ReadSeedMaterialFromOSEntropy(
-          absl::Span<uint32_t>(nullptr, 32)),
-      "!= nullptr");
-  (void)result;  // suppress unused-variable warning
-#endif
-}
-
-TEST(ReadSeedMaterialFromURBG, SeedMaterialEqualsVariateSequence) {
-  // Two default-constructed instances of std::mt19937_64 are guaranteed to
-  // produce equal variate-sequences.
-  std::mt19937 urbg_1;
-  std::mt19937 urbg_2;
-  constexpr size_t kSeedMaterialSize = 1024;
-  uint32_t seed_material[kSeedMaterialSize] = {};
-
-  EXPECT_TRUE(absl::random_internal::ReadSeedMaterialFromURBG(
-      &urbg_1, absl::Span<uint32_t>(seed_material, kSeedMaterialSize)));
-  for (uint32_t seed : seed_material) {
-    EXPECT_EQ(seed, urbg_2());
-  }
-}
-
-TEST(ReadSeedMaterialFromURBG, ReadZeroBytesIsNoOp) {
-  std::mt19937_64 urbg;
-  uint32_t seed_material[32];
-  std::memset(seed_material, 0xAA, sizeof(seed_material));
-  EXPECT_TRUE(absl::random_internal::ReadSeedMaterialFromURBG(
-      &urbg, absl::Span<uint32_t>(seed_material, 0)));
-
-  EXPECT_THAT(seed_material, Each(Eq(0xAAAAAAAA)));
-}
-
-TEST(ReadSeedMaterialFromURBG, NullUrbgArgument) {
-  constexpr size_t kSeedMaterialSize = 32;
-  uint32_t seed_material[kSeedMaterialSize];
-#ifdef NDEBUG
-  EXPECT_FALSE(absl::random_internal::ReadSeedMaterialFromURBG<std::mt19937_64>(
-      nullptr, absl::Span<uint32_t>(seed_material, kSeedMaterialSize)));
-#else
-  bool result;
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(
-      result = absl::random_internal::ReadSeedMaterialFromURBG<std::mt19937_64>(
-          nullptr, absl::Span<uint32_t>(seed_material, kSeedMaterialSize)),
-      "!= nullptr");
-  (void)result;  // suppress unused-variable warning
-#endif
-}
-
-TEST(ReadSeedMaterialFromURBG, NullPtrVectorArgument) {
-  std::mt19937_64 urbg;
-#ifdef NDEBUG
-  EXPECT_FALSE(absl::random_internal::ReadSeedMaterialFromURBG(
-      &urbg, absl::Span<uint32_t>(nullptr, 32)));
-#else
-  bool result;
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(
-      result = absl::random_internal::ReadSeedMaterialFromURBG(
-          &urbg, absl::Span<uint32_t>(nullptr, 32)),
-      "!= nullptr");
-  (void)result;  // suppress unused-variable warning
-#endif
-}
-
-// The avalanche effect is a desirable cryptographic property of hashes in which
-// changing a single bit in the input causes each bit of the output to be
-// changed with probability near 50%.
-//
-// https://en.wikipedia.org/wiki/Avalanche_effect
-
-TEST(MixSequenceIntoSeedMaterial, AvalancheEffectTestOneBitLong) {
-  std::vector<uint32_t> seed_material = {1, 2, 3, 4, 5, 6, 7, 8};
-
-  // For every 32-bit number with exactly one bit set, verify the avalanche
-  // effect holds.  In order to reduce flakiness of tests, accept values
-  // anywhere in the range of 30%-70%.
-  for (uint32_t v = 1; v != 0; v <<= 1) {
-    std::vector<uint32_t> seed_material_copy = seed_material;
-    absl::random_internal::MixIntoSeedMaterial(
-        absl::Span<uint32_t>(&v, 1),
-        absl::Span<uint32_t>(seed_material_copy.data(),
-                             seed_material_copy.size()));
-
-    uint32_t changed_bits = 0;
-    for (size_t i = 0; i < seed_material.size(); i++) {
-      std::bitset<sizeof(uint32_t) * 8> bitset(seed_material[i] ^
-                                               seed_material_copy[i]);
-      changed_bits += bitset.count();
-    }
-
-    EXPECT_LE(changed_bits, 0.7 * sizeof(uint32_t) * 8 * seed_material.size());
-    EXPECT_GE(changed_bits, 0.3 * sizeof(uint32_t) * 8 * seed_material.size());
-  }
-}
-
-TEST(MixSequenceIntoSeedMaterial, AvalancheEffectTestOneBitShort) {
-  std::vector<uint32_t> seed_material = {1};
-
-  // For every 32-bit number with exactly one bit set, verify the avalanche
-  // effect holds.  In order to reduce flakiness of tests, accept values
-  // anywhere in the range of 30%-70%.
-  for (uint32_t v = 1; v != 0; v <<= 1) {
-    std::vector<uint32_t> seed_material_copy = seed_material;
-    absl::random_internal::MixIntoSeedMaterial(
-        absl::Span<uint32_t>(&v, 1),
-        absl::Span<uint32_t>(seed_material_copy.data(),
-                             seed_material_copy.size()));
-
-    uint32_t changed_bits = 0;
-    for (size_t i = 0; i < seed_material.size(); i++) {
-      std::bitset<sizeof(uint32_t) * 8> bitset(seed_material[i] ^
-                                               seed_material_copy[i]);
-      changed_bits += bitset.count();
-    }
-
-    EXPECT_LE(changed_bits, 0.7 * sizeof(uint32_t) * 8 * seed_material.size());
-    EXPECT_GE(changed_bits, 0.3 * sizeof(uint32_t) * 8 * seed_material.size());
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/sequence_urbg.h b/third_party/abseil/absl/random/internal/sequence_urbg.h
deleted file mode 100644
index bc96a12..0000000
--- a/third_party/abseil/absl/random/internal/sequence_urbg.h
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_SEQUENCE_URBG_H_
-#define ABSL_RANDOM_INTERNAL_SEQUENCE_URBG_H_
-
-#include <cstdint>
-#include <cstring>
-#include <limits>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// `sequence_urbg` is a simple random number generator which meets the
-// requirements of [rand.req.urbg], and is solely for testing absl
-// distributions.
-class sequence_urbg {
- public:
-  using result_type = uint64_t;
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  sequence_urbg(std::initializer_list<result_type> data) : i_(0), data_(data) {}
-  void reset() { i_ = 0; }
-
-  result_type operator()() { return data_[i_++ % data_.size()]; }
-
-  size_t invocations() const { return i_; }
-
- private:
-  size_t i_;
-  std::vector<result_type> data_;
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_SEQUENCE_URBG_H_
diff --git a/third_party/abseil/absl/random/internal/traits.h b/third_party/abseil/absl/random/internal/traits.h
deleted file mode 100644
index 75772bd..0000000
--- a/third_party/abseil/absl/random/internal/traits.h
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_TRAITS_H_
-#define ABSL_RANDOM_INTERNAL_TRAITS_H_
-
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// random_internal::is_widening_convertible<A, B>
-//
-// Returns whether a type A is widening-convertible to a type B.
-//
-// A is widening-convertible to B means:
-//   A a = <any number>;
-//   B b = a;
-//   A c = b;
-//   EXPECT_EQ(a, c);
-template <typename A, typename B>
-class is_widening_convertible {
-  // As long as there are enough bits in the exact part of a number:
-  // - unsigned can fit in float, signed, unsigned
-  // - signed can fit in float, signed
-  // - float can fit in float
-  // So we define rank to be:
-  // - rank(float) -> 2
-  // - rank(signed) -> 1
-  // - rank(unsigned) -> 0
-  template <class T>
-  static constexpr int rank() {
-    return !std::numeric_limits<T>::is_integer +
-           std::numeric_limits<T>::is_signed;
-  }
-
- public:
-  // If an arithmetic-type B can represent at least as many digits as a type A,
-  // and B belongs to a rank no lower than A, then A can be safely represented
-  // by B through a widening-conversion.
-  static constexpr bool value =
-      std::numeric_limits<A>::digits <= std::numeric_limits<B>::digits &&
-      rank<A>() <= rank<B>();
-};
-
-// unsigned_bits<N>::type returns the unsigned int type with the indicated
-// number of bits.
-template <size_t N>
-struct unsigned_bits;
-
-template <>
-struct unsigned_bits<8> {
-  using type = uint8_t;
-};
-template <>
-struct unsigned_bits<16> {
-  using type = uint16_t;
-};
-template <>
-struct unsigned_bits<32> {
-  using type = uint32_t;
-};
-template <>
-struct unsigned_bits<64> {
-  using type = uint64_t;
-};
-
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-template <>
-struct unsigned_bits<128> {
-  using type = __uint128_t;
-};
-#endif
-
-template <typename IntType>
-struct make_unsigned_bits {
-  using type = typename unsigned_bits<std::numeric_limits<
-      typename std::make_unsigned<IntType>::type>::digits>::type;
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_TRAITS_H_
diff --git a/third_party/abseil/absl/random/internal/traits_test.cc b/third_party/abseil/absl/random/internal/traits_test.cc
deleted file mode 100644
index a844887..0000000
--- a/third_party/abseil/absl/random/internal/traits_test.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/traits.h"
-
-#include <cstdint>
-#include <type_traits>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using absl::random_internal::is_widening_convertible;
-
-// CheckWideningConvertsToSelf<T1, T2, ...>()
-//
-// For each type T, checks:
-// - T IS widening-convertible to itself.
-//
-template <typename T>
-void CheckWideningConvertsToSelf() {
-  static_assert(is_widening_convertible<T, T>::value,
-                "Type is not convertible to self!");
-}
-
-template <typename T, typename Next, typename... Args>
-void CheckWideningConvertsToSelf() {
-  CheckWideningConvertsToSelf<T>();
-  CheckWideningConvertsToSelf<Next, Args...>();
-}
-
-// CheckNotWideningConvertibleWithSigned<T1, T2, ...>()
-//
-// For each unsigned-type T, checks that:
-// - T is NOT widening-convertible to Signed(T)
-// - Signed(T) is NOT widening-convertible to T
-//
-template <typename T>
-void CheckNotWideningConvertibleWithSigned() {
-  using signed_t = typename std::make_signed<T>::type;
-
-  static_assert(!is_widening_convertible<T, signed_t>::value,
-                "Unsigned type is convertible to same-sized signed-type!");
-  static_assert(!is_widening_convertible<signed_t, T>::value,
-                "Signed type is convertible to same-sized unsigned-type!");
-}
-
-template <typename T, typename Next, typename... Args>
-void CheckNotWideningConvertibleWithSigned() {
-  CheckNotWideningConvertibleWithSigned<T>();
-  CheckWideningConvertsToSelf<Next, Args...>();
-}
-
-// CheckWideningConvertsToLargerType<T1, T2, ...>()
-//
-// For each successive unsigned-types {Ti, Ti+1}, checks that:
-// - Ti IS widening-convertible to Ti+1
-// - Ti IS widening-convertible to Signed(Ti+1)
-// - Signed(Ti) is NOT widening-convertible to Ti
-// - Signed(Ti) IS widening-convertible to Ti+1
-template <typename T, typename Higher>
-void CheckWideningConvertsToLargerTypes() {
-  using signed_t = typename std::make_signed<T>::type;
-  using higher_t = Higher;
-  using signed_higher_t = typename std::make_signed<Higher>::type;
-
-  static_assert(is_widening_convertible<T, higher_t>::value,
-                "Type not embeddable into larger type!");
-  static_assert(is_widening_convertible<T, signed_higher_t>::value,
-                "Type not embeddable into larger signed type!");
-  static_assert(!is_widening_convertible<signed_t, higher_t>::value,
-                "Signed type is embeddable into larger unsigned type!");
-  static_assert(is_widening_convertible<signed_t, signed_higher_t>::value,
-                "Signed type not embeddable into larger signed type!");
-}
-
-template <typename T, typename Higher, typename Next, typename... Args>
-void CheckWideningConvertsToLargerTypes() {
-  CheckWideningConvertsToLargerTypes<T, Higher>();
-  CheckWideningConvertsToLargerTypes<Higher, Next, Args...>();
-}
-
-// CheckWideningConvertsTo<T, U, [expect]>
-//
-// Checks that T DOES widening-convert to U.
-// If "expect" is false, then asserts that T does NOT widening-convert to U.
-template <typename T, typename U, bool expect = true>
-void CheckWideningConvertsTo() {
-  static_assert(is_widening_convertible<T, U>::value == expect,
-                "Unexpected result for is_widening_convertible<T, U>!");
-}
-
-TEST(TraitsTest, IsWideningConvertibleTest) {
-  constexpr bool kInvalid = false;
-
-  CheckWideningConvertsToSelf<
-      uint8_t, uint16_t, uint32_t, uint64_t,
-      int8_t,  int16_t,  int32_t,  int64_t,
-      float,   double>();
-  CheckNotWideningConvertibleWithSigned<
-      uint8_t, uint16_t, uint32_t, uint64_t>();
-  CheckWideningConvertsToLargerTypes<
-      uint8_t, uint16_t, uint32_t, uint64_t>();
-
-  CheckWideningConvertsTo<float, double>();
-  CheckWideningConvertsTo<uint16_t, float>();
-  CheckWideningConvertsTo<uint32_t, double>();
-  CheckWideningConvertsTo<uint64_t, double, kInvalid>();
-  CheckWideningConvertsTo<double, float, kInvalid>();
-
-  CheckWideningConvertsTo<bool, int>();
-  CheckWideningConvertsTo<bool, float>();
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/uniform_helper.h b/third_party/abseil/absl/random/internal/uniform_helper.h
deleted file mode 100644
index 1243bc1..0000000
--- a/third_party/abseil/absl/random/internal/uniform_helper.h
+++ /dev/null
@@ -1,244 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#ifndef ABSL_RANDOM_INTERNAL_UNIFORM_HELPER_H_
-#define ABSL_RANDOM_INTERNAL_UNIFORM_HELPER_H_
-
-#include <cmath>
-#include <limits>
-#include <type_traits>
-
-#include "absl/base/config.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-template <typename IntType>
-class uniform_int_distribution;
-
-template <typename RealType>
-class uniform_real_distribution;
-
-// Interval tag types which specify whether the interval is open or closed
-// on either boundary.
-
-namespace random_internal {
-template <typename T>
-struct TagTypeCompare {};
-
-template <typename T>
-constexpr bool operator==(TagTypeCompare<T>, TagTypeCompare<T>) {
-  // Tags are mono-states. They always compare equal.
-  return true;
-}
-template <typename T>
-constexpr bool operator!=(TagTypeCompare<T>, TagTypeCompare<T>) {
-  return false;
-}
-
-}  // namespace random_internal
-
-struct IntervalClosedClosedTag
-    : public random_internal::TagTypeCompare<IntervalClosedClosedTag> {};
-struct IntervalClosedOpenTag
-    : public random_internal::TagTypeCompare<IntervalClosedOpenTag> {};
-struct IntervalOpenClosedTag
-    : public random_internal::TagTypeCompare<IntervalOpenClosedTag> {};
-struct IntervalOpenOpenTag
-    : public random_internal::TagTypeCompare<IntervalOpenOpenTag> {};
-
-namespace random_internal {
-
-// In the absence of an explicitly provided return-type, the template
-// "uniform_inferred_return_t<A, B>" is used to derive a suitable type, based on
-// the data-types of the endpoint-arguments {A lo, B hi}.
-//
-// Given endpoints {A lo, B hi}, one of {A, B} will be chosen as the
-// return-type, if one type can be implicitly converted into the other, in a
-// lossless way. The template "is_widening_convertible" implements the
-// compile-time logic for deciding if such a conversion is possible.
-//
-// If no such conversion between {A, B} exists, then the overload for
-// absl::Uniform() will be discarded, and the call will be ill-formed.
-// Return-type for absl::Uniform() when the return-type is inferred.
-template <typename A, typename B>
-using uniform_inferred_return_t =
-    absl::enable_if_t<absl::disjunction<is_widening_convertible<A, B>,
-                                        is_widening_convertible<B, A>>::value,
-                      typename std::conditional<
-                          is_widening_convertible<A, B>::value, B, A>::type>;
-
-// The functions
-//    uniform_lower_bound(tag, a, b)
-// and
-//    uniform_upper_bound(tag, a, b)
-// are used as implementation-details for absl::Uniform().
-//
-// Conceptually,
-//    [a, b] == [uniform_lower_bound(IntervalClosedClosed, a, b),
-//               uniform_upper_bound(IntervalClosedClosed, a, b)]
-//    (a, b) == [uniform_lower_bound(IntervalOpenOpen, a, b),
-//               uniform_upper_bound(IntervalOpenOpen, a, b)]
-//    [a, b) == [uniform_lower_bound(IntervalClosedOpen, a, b),
-//               uniform_upper_bound(IntervalClosedOpen, a, b)]
-//    (a, b] == [uniform_lower_bound(IntervalOpenClosed, a, b),
-//               uniform_upper_bound(IntervalOpenClosed, a, b)]
-//
-template <typename IntType, typename Tag>
-typename absl::enable_if_t<
-    absl::conjunction<
-        std::is_integral<IntType>,
-        absl::disjunction<std::is_same<Tag, IntervalOpenClosedTag>,
-                          std::is_same<Tag, IntervalOpenOpenTag>>>::value,
-    IntType>
-uniform_lower_bound(Tag, IntType a, IntType) {
-  return a < (std::numeric_limits<IntType>::max)() ? (a + 1) : a;
-}
-
-template <typename FloatType, typename Tag>
-typename absl::enable_if_t<
-    absl::conjunction<
-        std::is_floating_point<FloatType>,
-        absl::disjunction<std::is_same<Tag, IntervalOpenClosedTag>,
-                          std::is_same<Tag, IntervalOpenOpenTag>>>::value,
-    FloatType>
-uniform_lower_bound(Tag, FloatType a, FloatType b) {
-  return std::nextafter(a, b);
-}
-
-template <typename NumType, typename Tag>
-typename absl::enable_if_t<
-    absl::disjunction<std::is_same<Tag, IntervalClosedClosedTag>,
-                      std::is_same<Tag, IntervalClosedOpenTag>>::value,
-    NumType>
-uniform_lower_bound(Tag, NumType a, NumType) {
-  return a;
-}
-
-template <typename IntType, typename Tag>
-typename absl::enable_if_t<
-    absl::conjunction<
-        std::is_integral<IntType>,
-        absl::disjunction<std::is_same<Tag, IntervalClosedOpenTag>,
-                          std::is_same<Tag, IntervalOpenOpenTag>>>::value,
-    IntType>
-uniform_upper_bound(Tag, IntType, IntType b) {
-  return b > (std::numeric_limits<IntType>::min)() ? (b - 1) : b;
-}
-
-template <typename FloatType, typename Tag>
-typename absl::enable_if_t<
-    absl::conjunction<
-        std::is_floating_point<FloatType>,
-        absl::disjunction<std::is_same<Tag, IntervalClosedOpenTag>,
-                          std::is_same<Tag, IntervalOpenOpenTag>>>::value,
-    FloatType>
-uniform_upper_bound(Tag, FloatType, FloatType b) {
-  return b;
-}
-
-template <typename IntType, typename Tag>
-typename absl::enable_if_t<
-    absl::conjunction<
-        std::is_integral<IntType>,
-        absl::disjunction<std::is_same<Tag, IntervalClosedClosedTag>,
-                          std::is_same<Tag, IntervalOpenClosedTag>>>::value,
-    IntType>
-uniform_upper_bound(Tag, IntType, IntType b) {
-  return b;
-}
-
-template <typename FloatType, typename Tag>
-typename absl::enable_if_t<
-    absl::conjunction<
-        std::is_floating_point<FloatType>,
-        absl::disjunction<std::is_same<Tag, IntervalClosedClosedTag>,
-                          std::is_same<Tag, IntervalOpenClosedTag>>>::value,
-    FloatType>
-uniform_upper_bound(Tag, FloatType, FloatType b) {
-  return std::nextafter(b, (std::numeric_limits<FloatType>::max)());
-}
-
-// Returns whether the bounds are valid for the underlying distribution.
-// Inputs must have already been resolved via uniform_*_bound calls.
-//
-// The c++ standard constraints in [rand.dist.uni.int] are listed as:
-//    requires: lo <= hi.
-//
-// In the uniform_int_distrubtion, {lo, hi} are closed, closed. Thus:
-// [0, 0] is legal.
-// [0, 0) is not legal, but [0, 1) is, which translates to [0, 0].
-// (0, 1) is not legal, but (0, 2) is, which translates to [1, 1].
-// (0, 0] is not legal, but (0, 1] is, which translates to [1, 1].
-//
-// The c++ standard constraints in [rand.dist.uni.real] are listed as:
-//    requires: lo <= hi.
-//    requires: (hi - lo) <= numeric_limits<T>::max()
-//
-// In the uniform_real_distribution, {lo, hi} are closed, open, Thus:
-// [0, 0] is legal, which is [0, 0+epsilon).
-// [0, 0) is legal.
-// (0, 0) is not legal, but (0-epsilon, 0+epsilon) is.
-// (0, 0] is not legal, but (0, 0+epsilon] is.
-//
-template <typename FloatType>
-absl::enable_if_t<std::is_floating_point<FloatType>::value, bool>
-is_uniform_range_valid(FloatType a, FloatType b) {
-  return a <= b && std::isfinite(b - a);
-}
-
-template <typename IntType>
-absl::enable_if_t<std::is_integral<IntType>::value, bool>
-is_uniform_range_valid(IntType a, IntType b) {
-  return a <= b;
-}
-
-// UniformDistribution selects either absl::uniform_int_distribution
-// or absl::uniform_real_distribution depending on the NumType parameter.
-template <typename NumType>
-using UniformDistribution =
-    typename std::conditional<std::is_integral<NumType>::value,
-                              absl::uniform_int_distribution<NumType>,
-                              absl::uniform_real_distribution<NumType>>::type;
-
-// UniformDistributionWrapper is used as the underlying distribution type
-// by the absl::Uniform template function. It selects the proper Abseil
-// uniform distribution and provides constructor overloads that match the
-// expected parameter order as well as adjusting distribtuion bounds based
-// on the tag.
-template <typename NumType>
-struct UniformDistributionWrapper : public UniformDistribution<NumType> {
-  template <typename TagType>
-  explicit UniformDistributionWrapper(TagType, NumType lo, NumType hi)
-      : UniformDistribution<NumType>(
-            uniform_lower_bound<NumType>(TagType{}, lo, hi),
-            uniform_upper_bound<NumType>(TagType{}, lo, hi)) {}
-
-  explicit UniformDistributionWrapper(NumType lo, NumType hi)
-      : UniformDistribution<NumType>(
-            uniform_lower_bound<NumType>(IntervalClosedOpenTag(), lo, hi),
-            uniform_upper_bound<NumType>(IntervalClosedOpenTag(), lo, hi)) {}
-
-  explicit UniformDistributionWrapper()
-      : UniformDistribution<NumType>(std::numeric_limits<NumType>::lowest(),
-                                     (std::numeric_limits<NumType>::max)()) {}
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_UNIFORM_HELPER_H_
diff --git a/third_party/abseil/absl/random/internal/uniform_helper_test.cc b/third_party/abseil/absl/random/internal/uniform_helper_test.cc
deleted file mode 100644
index 173c49b..0000000
--- a/third_party/abseil/absl/random/internal/uniform_helper_test.cc
+++ /dev/null
@@ -1,279 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/uniform_helper.h"
-
-#include <cmath>
-#include <cstdint>
-#include <random>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using absl::IntervalClosedClosedTag;
-using absl::IntervalClosedOpenTag;
-using absl::IntervalOpenClosedTag;
-using absl::IntervalOpenOpenTag;
-using absl::random_internal::uniform_inferred_return_t;
-using absl::random_internal::uniform_lower_bound;
-using absl::random_internal::uniform_upper_bound;
-
-class UniformHelperTest : public testing::Test {};
-
-TEST_F(UniformHelperTest, UniformBoundFunctionsGeneral) {
-  constexpr IntervalClosedClosedTag IntervalClosedClosed;
-  constexpr IntervalClosedOpenTag IntervalClosedOpen;
-  constexpr IntervalOpenClosedTag IntervalOpenClosed;
-  constexpr IntervalOpenOpenTag IntervalOpenOpen;
-
-  // absl::uniform_int_distribution natively assumes IntervalClosedClosed
-  // absl::uniform_real_distribution natively assumes IntervalClosedOpen
-
-  EXPECT_EQ(uniform_lower_bound(IntervalOpenClosed, 0, 100), 1);
-  EXPECT_EQ(uniform_lower_bound(IntervalOpenOpen, 0, 100), 1);
-  EXPECT_GT(uniform_lower_bound<float>(IntervalOpenClosed, 0, 1.0), 0);
-  EXPECT_GT(uniform_lower_bound<float>(IntervalOpenOpen, 0, 1.0), 0);
-  EXPECT_GT(uniform_lower_bound<double>(IntervalOpenClosed, 0, 1.0), 0);
-  EXPECT_GT(uniform_lower_bound<double>(IntervalOpenOpen, 0, 1.0), 0);
-
-  EXPECT_EQ(uniform_lower_bound(IntervalClosedClosed, 0, 100), 0);
-  EXPECT_EQ(uniform_lower_bound(IntervalClosedOpen, 0, 100), 0);
-  EXPECT_EQ(uniform_lower_bound<float>(IntervalClosedClosed, 0, 1.0), 0);
-  EXPECT_EQ(uniform_lower_bound<float>(IntervalClosedOpen, 0, 1.0), 0);
-  EXPECT_EQ(uniform_lower_bound<double>(IntervalClosedClosed, 0, 1.0), 0);
-  EXPECT_EQ(uniform_lower_bound<double>(IntervalClosedOpen, 0, 1.0), 0);
-
-  EXPECT_EQ(uniform_upper_bound(IntervalOpenOpen, 0, 100), 99);
-  EXPECT_EQ(uniform_upper_bound(IntervalClosedOpen, 0, 100), 99);
-  EXPECT_EQ(uniform_upper_bound<float>(IntervalOpenOpen, 0, 1.0), 1.0);
-  EXPECT_EQ(uniform_upper_bound<float>(IntervalClosedOpen, 0, 1.0), 1.0);
-  EXPECT_EQ(uniform_upper_bound<double>(IntervalOpenOpen, 0, 1.0), 1.0);
-  EXPECT_EQ(uniform_upper_bound<double>(IntervalClosedOpen, 0, 1.0), 1.0);
-
-  EXPECT_EQ(uniform_upper_bound(IntervalOpenClosed, 0, 100), 100);
-  EXPECT_EQ(uniform_upper_bound(IntervalClosedClosed, 0, 100), 100);
-  EXPECT_GT(uniform_upper_bound<float>(IntervalOpenClosed, 0, 1.0), 1.0);
-  EXPECT_GT(uniform_upper_bound<float>(IntervalClosedClosed, 0, 1.0), 1.0);
-  EXPECT_GT(uniform_upper_bound<double>(IntervalOpenClosed, 0, 1.0), 1.0);
-  EXPECT_GT(uniform_upper_bound<double>(IntervalClosedClosed, 0, 1.0), 1.0);
-
-  // Negative value tests
-  EXPECT_EQ(uniform_lower_bound(IntervalOpenClosed, -100, -1), -99);
-  EXPECT_EQ(uniform_lower_bound(IntervalOpenOpen, -100, -1), -99);
-  EXPECT_GT(uniform_lower_bound<float>(IntervalOpenClosed, -2.0, -1.0), -2.0);
-  EXPECT_GT(uniform_lower_bound<float>(IntervalOpenOpen, -2.0, -1.0), -2.0);
-  EXPECT_GT(uniform_lower_bound<double>(IntervalOpenClosed, -2.0, -1.0), -2.0);
-  EXPECT_GT(uniform_lower_bound<double>(IntervalOpenOpen, -2.0, -1.0), -2.0);
-
-  EXPECT_EQ(uniform_lower_bound(IntervalClosedClosed, -100, -1), -100);
-  EXPECT_EQ(uniform_lower_bound(IntervalClosedOpen, -100, -1), -100);
-  EXPECT_EQ(uniform_lower_bound<float>(IntervalClosedClosed, -2.0, -1.0), -2.0);
-  EXPECT_EQ(uniform_lower_bound<float>(IntervalClosedOpen, -2.0, -1.0), -2.0);
-  EXPECT_EQ(uniform_lower_bound<double>(IntervalClosedClosed, -2.0, -1.0),
-            -2.0);
-  EXPECT_EQ(uniform_lower_bound<double>(IntervalClosedOpen, -2.0, -1.0), -2.0);
-
-  EXPECT_EQ(uniform_upper_bound(IntervalOpenOpen, -100, -1), -2);
-  EXPECT_EQ(uniform_upper_bound(IntervalClosedOpen, -100, -1), -2);
-  EXPECT_EQ(uniform_upper_bound<float>(IntervalOpenOpen, -2.0, -1.0), -1.0);
-  EXPECT_EQ(uniform_upper_bound<float>(IntervalClosedOpen, -2.0, -1.0), -1.0);
-  EXPECT_EQ(uniform_upper_bound<double>(IntervalOpenOpen, -2.0, -1.0), -1.0);
-  EXPECT_EQ(uniform_upper_bound<double>(IntervalClosedOpen, -2.0, -1.0), -1.0);
-
-  EXPECT_EQ(uniform_upper_bound(IntervalOpenClosed, -100, -1), -1);
-  EXPECT_EQ(uniform_upper_bound(IntervalClosedClosed, -100, -1), -1);
-  EXPECT_GT(uniform_upper_bound<float>(IntervalOpenClosed, -2.0, -1.0), -1.0);
-  EXPECT_GT(uniform_upper_bound<float>(IntervalClosedClosed, -2.0, -1.0), -1.0);
-  EXPECT_GT(uniform_upper_bound<double>(IntervalOpenClosed, -2.0, -1.0), -1.0);
-  EXPECT_GT(uniform_upper_bound<double>(IntervalClosedClosed, -2.0, -1.0),
-            -1.0);
-
-  EXPECT_GT(uniform_lower_bound(IntervalOpenClosed, 1.0, 2.0), 1.0);
-  EXPECT_LT(uniform_lower_bound(IntervalOpenClosed, 1.0, +0.0), 1.0);
-  EXPECT_LT(uniform_lower_bound(IntervalOpenClosed, 1.0, -0.0), 1.0);
-  EXPECT_LT(uniform_lower_bound(IntervalOpenClosed, 1.0, -1.0), 1.0);
-}
-
-TEST_F(UniformHelperTest, UniformBoundFunctionsIntBounds) {
-  // Verifies the saturating nature of uniform_lower_bound and
-  // uniform_upper_bound
-  constexpr IntervalOpenOpenTag IntervalOpenOpen;
-
-  // uint max.
-  constexpr auto m = (std::numeric_limits<uint64_t>::max)();
-
-  EXPECT_EQ(1, uniform_lower_bound(IntervalOpenOpen, 0u, 0u));
-  EXPECT_EQ(m, uniform_lower_bound(IntervalOpenOpen, m, m));
-  EXPECT_EQ(m, uniform_lower_bound(IntervalOpenOpen, m - 1, m - 1));
-  EXPECT_EQ(0, uniform_upper_bound(IntervalOpenOpen, 0u, 0u));
-  EXPECT_EQ(m - 1, uniform_upper_bound(IntervalOpenOpen, m, m));
-
-  // int min/max
-  constexpr auto l = (std::numeric_limits<int64_t>::min)();
-  constexpr auto r = (std::numeric_limits<int64_t>::max)();
-  EXPECT_EQ(1, uniform_lower_bound(IntervalOpenOpen, 0, 0));
-  EXPECT_EQ(l + 1, uniform_lower_bound(IntervalOpenOpen, l, l));
-  EXPECT_EQ(r, uniform_lower_bound(IntervalOpenOpen, r - 1, r - 1));
-  EXPECT_EQ(r, uniform_lower_bound(IntervalOpenOpen, r, r));
-  EXPECT_EQ(-1, uniform_upper_bound(IntervalOpenOpen, 0, 0));
-  EXPECT_EQ(l, uniform_upper_bound(IntervalOpenOpen, l, l));
-  EXPECT_EQ(r - 1, uniform_upper_bound(IntervalOpenOpen, r, r));
-}
-
-TEST_F(UniformHelperTest, UniformBoundFunctionsRealBounds) {
-  // absl::uniform_real_distribution natively assumes IntervalClosedOpen;
-  // use the inverse here so each bound has to change.
-  constexpr IntervalOpenClosedTag IntervalOpenClosed;
-
-  // Edge cases: the next value toward itself is itself.
-  EXPECT_EQ(1.0, uniform_lower_bound(IntervalOpenClosed, 1.0, 1.0));
-  EXPECT_EQ(1.0f, uniform_lower_bound(IntervalOpenClosed, 1.0f, 1.0f));
-
-  // rightmost and leftmost finite values.
-  constexpr auto r = (std::numeric_limits<double>::max)();
-  const auto re = std::nexttoward(r, 0.0);
-  constexpr auto l = -r;
-  const auto le = std::nexttoward(l, 0.0);
-
-  EXPECT_EQ(l, uniform_lower_bound(IntervalOpenClosed, l, l));     // (l,l)
-  EXPECT_EQ(r, uniform_lower_bound(IntervalOpenClosed, r, r));     // (r,r)
-  EXPECT_EQ(le, uniform_lower_bound(IntervalOpenClosed, l, r));    // (l,r)
-  EXPECT_EQ(le, uniform_lower_bound(IntervalOpenClosed, l, 0.0));  // (l, 0)
-  EXPECT_EQ(le, uniform_lower_bound(IntervalOpenClosed, l, le));   // (l, le)
-  EXPECT_EQ(r, uniform_lower_bound(IntervalOpenClosed, re, r));    // (re, r)
-
-  EXPECT_EQ(le, uniform_upper_bound(IntervalOpenClosed, l, l));   // (l,l)
-  EXPECT_EQ(r, uniform_upper_bound(IntervalOpenClosed, r, r));    // (r,r)
-  EXPECT_EQ(r, uniform_upper_bound(IntervalOpenClosed, l, r));    // (l,r)
-  EXPECT_EQ(r, uniform_upper_bound(IntervalOpenClosed, l, re));   // (l,re)
-  EXPECT_EQ(r, uniform_upper_bound(IntervalOpenClosed, 0.0, r));  // (0, r)
-  EXPECT_EQ(r, uniform_upper_bound(IntervalOpenClosed, re, r));   // (re, r)
-  EXPECT_EQ(r, uniform_upper_bound(IntervalOpenClosed, le, re));  // (le, re)
-
-  const double e = std::nextafter(1.0, 2.0);  // 1 + epsilon
-  const double f = std::nextafter(1.0, 0.0);  // 1 - epsilon
-
-  // (1.0, 1.0 + epsilon)
-  EXPECT_EQ(e, uniform_lower_bound(IntervalOpenClosed, 1.0, e));
-  EXPECT_EQ(std::nextafter(e, 2.0),
-            uniform_upper_bound(IntervalOpenClosed, 1.0, e));
-
-  // (1.0-epsilon, 1.0)
-  EXPECT_EQ(1.0, uniform_lower_bound(IntervalOpenClosed, f, 1.0));
-  EXPECT_EQ(e, uniform_upper_bound(IntervalOpenClosed, f, 1.0));
-
-  // denorm cases.
-  const double g = std::numeric_limits<double>::denorm_min();
-  const double h = std::nextafter(g, 1.0);
-
-  // (0, denorm_min)
-  EXPECT_EQ(g, uniform_lower_bound(IntervalOpenClosed, 0.0, g));
-  EXPECT_EQ(h, uniform_upper_bound(IntervalOpenClosed, 0.0, g));
-
-  // (denorm_min, 1.0)
-  EXPECT_EQ(h, uniform_lower_bound(IntervalOpenClosed, g, 1.0));
-  EXPECT_EQ(e, uniform_upper_bound(IntervalOpenClosed, g, 1.0));
-
-  // Edge cases: invalid bounds.
-  EXPECT_EQ(f, uniform_lower_bound(IntervalOpenClosed, 1.0, -1.0));
-}
-
-struct Invalid {};
-
-template <typename A, typename B>
-auto InferredUniformReturnT(int) -> uniform_inferred_return_t<A, B>;
-
-template <typename, typename>
-Invalid InferredUniformReturnT(...);
-
-// Given types <A, B, Expect>, CheckArgsInferType() verifies that
-//
-//   uniform_inferred_return_t<A, B> and
-//   uniform_inferred_return_t<B, A>
-//
-// returns the type "Expect".
-//
-// This interface can also be used to assert that a given inferred return types
-// are invalid. Writing:
-//
-//   CheckArgsInferType<float, int, Invalid>()
-//
-// will assert that this overload does not exist.
-template <typename A, typename B, typename Expect>
-void CheckArgsInferType() {
-  static_assert(
-      absl::conjunction<
-          std::is_same<Expect, decltype(InferredUniformReturnT<A, B>(0))>,
-          std::is_same<Expect,
-                       decltype(InferredUniformReturnT<B, A>(0))>>::value,
-      "");
-}
-
-TEST_F(UniformHelperTest, UniformTypeInference) {
-  // Infers common types.
-  CheckArgsInferType<uint16_t, uint16_t, uint16_t>();
-  CheckArgsInferType<uint32_t, uint32_t, uint32_t>();
-  CheckArgsInferType<uint64_t, uint64_t, uint64_t>();
-  CheckArgsInferType<int16_t, int16_t, int16_t>();
-  CheckArgsInferType<int32_t, int32_t, int32_t>();
-  CheckArgsInferType<int64_t, int64_t, int64_t>();
-  CheckArgsInferType<float, float, float>();
-  CheckArgsInferType<double, double, double>();
-
-  // Properly promotes uint16_t.
-  CheckArgsInferType<uint16_t, uint32_t, uint32_t>();
-  CheckArgsInferType<uint16_t, uint64_t, uint64_t>();
-  CheckArgsInferType<uint16_t, int32_t, int32_t>();
-  CheckArgsInferType<uint16_t, int64_t, int64_t>();
-  CheckArgsInferType<uint16_t, float, float>();
-  CheckArgsInferType<uint16_t, double, double>();
-
-  // Properly promotes int16_t.
-  CheckArgsInferType<int16_t, int32_t, int32_t>();
-  CheckArgsInferType<int16_t, int64_t, int64_t>();
-  CheckArgsInferType<int16_t, float, float>();
-  CheckArgsInferType<int16_t, double, double>();
-
-  // Invalid (u)int16_t-pairings do not compile.
-  // See "CheckArgsInferType" comments above, for how this is achieved.
-  CheckArgsInferType<uint16_t, int16_t, Invalid>();
-  CheckArgsInferType<int16_t, uint32_t, Invalid>();
-  CheckArgsInferType<int16_t, uint64_t, Invalid>();
-
-  // Properly promotes uint32_t.
-  CheckArgsInferType<uint32_t, uint64_t, uint64_t>();
-  CheckArgsInferType<uint32_t, int64_t, int64_t>();
-  CheckArgsInferType<uint32_t, double, double>();
-
-  // Properly promotes int32_t.
-  CheckArgsInferType<int32_t, int64_t, int64_t>();
-  CheckArgsInferType<int32_t, double, double>();
-
-  // Invalid (u)int32_t-pairings do not compile.
-  CheckArgsInferType<uint32_t, int32_t, Invalid>();
-  CheckArgsInferType<int32_t, uint64_t, Invalid>();
-  CheckArgsInferType<int32_t, float, Invalid>();
-  CheckArgsInferType<uint32_t, float, Invalid>();
-
-  // Invalid (u)int64_t-pairings do not compile.
-  CheckArgsInferType<uint64_t, int64_t, Invalid>();
-  CheckArgsInferType<int64_t, float, Invalid>();
-  CheckArgsInferType<int64_t, double, Invalid>();
-
-  // Properly promotes float.
-  CheckArgsInferType<float, double, double>();
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/internal/wide_multiply.h b/third_party/abseil/absl/random/internal/wide_multiply.h
deleted file mode 100644
index b6e6c4b..0000000
--- a/third_party/abseil/absl/random/internal/wide_multiply.h
+++ /dev/null
@@ -1,111 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_WIDE_MULTIPLY_H_
-#define ABSL_RANDOM_INTERNAL_WIDE_MULTIPLY_H_
-
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-#if (defined(_WIN32) || defined(_WIN64)) && defined(_M_IA64)
-#include <intrin.h>  // NOLINT(build/include_order)
-#pragma intrinsic(_umul128)
-#define ABSL_INTERNAL_USE_UMUL128 1
-#endif
-
-#include "absl/base/config.h"
-#include "absl/numeric/bits.h"
-#include "absl/numeric/int128.h"
-#include "absl/random/internal/traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// Helper object to multiply two 64-bit values to a 128-bit value.
-// MultiplyU64ToU128 multiplies two 64-bit values to a 128-bit value.
-// If an intrinsic is available, it is used, otherwise use native 32-bit
-// multiplies to construct the result.
-inline absl::uint128 MultiplyU64ToU128(uint64_t a, uint64_t b) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  return absl::uint128(static_cast<__uint128_t>(a) * b);
-#elif defined(ABSL_INTERNAL_USE_UMUL128)
-  // uint64_t * uint64_t => uint128 multiply using imul intrinsic on MSVC.
-  uint64_t high = 0;
-  const uint64_t low = _umul128(a, b, &high);
-  return absl::MakeUint128(high, low);
-#else
-  // uint128(a) * uint128(b) in emulated mode computes a full 128-bit x 128-bit
-  // multiply.  However there are many cases where that is not necessary, and it
-  // is only necessary to support a 64-bit x 64-bit = 128-bit multiply.  This is
-  // for those cases.
-  const uint64_t a00 = static_cast<uint32_t>(a);
-  const uint64_t a32 = a >> 32;
-  const uint64_t b00 = static_cast<uint32_t>(b);
-  const uint64_t b32 = b >> 32;
-
-  const uint64_t c00 = a00 * b00;
-  const uint64_t c32a = a00 * b32;
-  const uint64_t c32b = a32 * b00;
-  const uint64_t c64 = a32 * b32;
-
-  const uint32_t carry =
-      static_cast<uint32_t>(((c00 >> 32) + static_cast<uint32_t>(c32a) +
-                             static_cast<uint32_t>(c32b)) >>
-                            32);
-
-  return absl::MakeUint128(c64 + (c32a >> 32) + (c32b >> 32) + carry,
-                           c00 + (c32a << 32) + (c32b << 32));
-#endif
-}
-
-// wide_multiply<T> multiplies two N-bit values to a 2N-bit result.
-template <typename UIntType>
-struct wide_multiply {
-  static constexpr size_t kN = std::numeric_limits<UIntType>::digits;
-  using input_type = UIntType;
-  using result_type = typename random_internal::unsigned_bits<kN * 2>::type;
-
-  static result_type multiply(input_type a, input_type b) {
-    return static_cast<result_type>(a) * b;
-  }
-
-  static input_type hi(result_type r) { return r >> kN; }
-  static input_type lo(result_type r) { return r; }
-
-  static_assert(std::is_unsigned<UIntType>::value,
-                "Class-template wide_multiply<> argument must be unsigned.");
-};
-
-#ifndef ABSL_HAVE_INTRINSIC_INT128
-template <>
-struct wide_multiply<uint64_t> {
-  using input_type = uint64_t;
-  using result_type = absl::uint128;
-
-  static result_type multiply(uint64_t a, uint64_t b) {
-    return MultiplyU64ToU128(a, b);
-  }
-
-  static uint64_t hi(result_type r) { return absl::Uint128High64(r); }
-  static uint64_t lo(result_type r) { return absl::Uint128Low64(r); }
-};
-#endif
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_WIDE_MULTIPLY_H_
diff --git a/third_party/abseil/absl/random/internal/wide_multiply_test.cc b/third_party/abseil/absl/random/internal/wide_multiply_test.cc
deleted file mode 100644
index e276cb5..0000000
--- a/third_party/abseil/absl/random/internal/wide_multiply_test.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/internal/wide_multiply.h"
-
-#include "gtest/gtest.h"
-#include "absl/numeric/int128.h"
-
-using absl::random_internal::MultiplyU64ToU128;
-
-namespace {
-
-TEST(WideMultiplyTest, MultiplyU64ToU128Test) {
-  constexpr uint64_t k1 = 1;
-  constexpr uint64_t kMax = ~static_cast<uint64_t>(0);
-
-  EXPECT_EQ(absl::uint128(0), MultiplyU64ToU128(0, 0));
-
-  // Max uint64_t
-  EXPECT_EQ(MultiplyU64ToU128(kMax, kMax),
-            absl::MakeUint128(0xfffffffffffffffe, 0x0000000000000001));
-  EXPECT_EQ(absl::MakeUint128(0, kMax), MultiplyU64ToU128(kMax, 1));
-  EXPECT_EQ(absl::MakeUint128(0, kMax), MultiplyU64ToU128(1, kMax));
-  for (int i = 0; i < 64; ++i) {
-    EXPECT_EQ(absl::MakeUint128(0, kMax) << i,
-              MultiplyU64ToU128(kMax, k1 << i));
-    EXPECT_EQ(absl::MakeUint128(0, kMax) << i,
-              MultiplyU64ToU128(k1 << i, kMax));
-  }
-
-  // 1-bit x 1-bit.
-  for (int i = 0; i < 64; ++i) {
-    for (int j = 0; j < 64; ++j) {
-      EXPECT_EQ(absl::MakeUint128(0, 1) << (i + j),
-                MultiplyU64ToU128(k1 << i, k1 << j));
-      EXPECT_EQ(absl::MakeUint128(0, 1) << (i + j),
-                MultiplyU64ToU128(k1 << i, k1 << j));
-    }
-  }
-
-  // Verified multiplies
-  EXPECT_EQ(MultiplyU64ToU128(0xffffeeeeddddcccc, 0xbbbbaaaa99998888),
-            absl::MakeUint128(0xbbbb9e2692c5dddc, 0xc28f7531048d2c60));
-  EXPECT_EQ(MultiplyU64ToU128(0x0123456789abcdef, 0xfedcba9876543210),
-            absl::MakeUint128(0x0121fa00ad77d742, 0x2236d88fe5618cf0));
-  EXPECT_EQ(MultiplyU64ToU128(0x0123456789abcdef, 0xfdb97531eca86420),
-            absl::MakeUint128(0x0120ae99d26725fc, 0xce197f0ecac319e0));
-  EXPECT_EQ(MultiplyU64ToU128(0x97a87f4f261ba3f2, 0xfedcba9876543210),
-            absl::MakeUint128(0x96fbf1a8ae78d0ba, 0x5a6dd4b71f278320));
-  EXPECT_EQ(MultiplyU64ToU128(0xfedcba9876543210, 0xfdb97531eca86420),
-            absl::MakeUint128(0xfc98c6981a413e22, 0x342d0bbf48948200));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/log_uniform_int_distribution.h b/third_party/abseil/absl/random/log_uniform_int_distribution.h
deleted file mode 100644
index 43e1011..0000000
--- a/third_party/abseil/absl/random/log_uniform_int_distribution.h
+++ /dev/null
@@ -1,257 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_LOG_UNIFORM_INT_DISTRIBUTION_H_
-#define ABSL_RANDOM_LOG_UNIFORM_INT_DISTRIBUTION_H_
-
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <istream>
-#include <limits>
-#include <ostream>
-#include <type_traits>
-
-#include "absl/numeric/bits.h"
-#include "absl/random/internal/fastmath.h"
-#include "absl/random/internal/generate_real.h"
-#include "absl/random/internal/iostream_state_saver.h"
-#include "absl/random/internal/traits.h"
-#include "absl/random/uniform_int_distribution.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// log_uniform_int_distribution:
-//
-// Returns a random variate R in range [min, max] such that
-// floor(log(R-min, base)) is uniformly distributed.
-// We ensure uniformity by discretization using the
-// boundary sets [0, 1, base, base * base, ... min(base*n, max)]
-//
-template <typename IntType = int>
-class log_uniform_int_distribution {
- private:
-  using unsigned_type =
-      typename random_internal::make_unsigned_bits<IntType>::type;
-
- public:
-  using result_type = IntType;
-
-  class param_type {
-   public:
-    using distribution_type = log_uniform_int_distribution;
-
-    explicit param_type(
-        result_type min = 0,
-        result_type max = (std::numeric_limits<result_type>::max)(),
-        result_type base = 2)
-        : min_(min),
-          max_(max),
-          base_(base),
-          range_(static_cast<unsigned_type>(max_) -
-                 static_cast<unsigned_type>(min_)),
-          log_range_(0) {
-      assert(max_ >= min_);
-      assert(base_ > 1);
-
-      if (base_ == 2) {
-        // Determine where the first set bit is on range(), giving a log2(range)
-        // value which can be used to construct bounds.
-        log_range_ =
-            (std::min)(bit_width(range()),
-                       static_cast<unsigned_type>(
-                           std::numeric_limits<unsigned_type>::digits));
-      } else {
-        // NOTE: Computing the logN(x) introduces error from 2 sources:
-        // 1. Conversion of int to double loses precision for values >=
-        // 2^53, which may cause some log() computations to operate on
-        // different values.
-        // 2. The error introduced by the division will cause the result
-        // to differ from the expected value.
-        //
-        // Thus a result which should equal K may equal K +/- epsilon,
-        // which can eliminate some values depending on where the bounds fall.
-        const double inv_log_base = 1.0 / std::log(base_);
-        const double log_range = std::log(static_cast<double>(range()) + 0.5);
-        log_range_ = static_cast<int>(std::ceil(inv_log_base * log_range));
-      }
-    }
-
-    result_type(min)() const { return min_; }
-    result_type(max)() const { return max_; }
-    result_type base() const { return base_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.min_ == b.min_ && a.max_ == b.max_ && a.base_ == b.base_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class log_uniform_int_distribution;
-
-    int log_range() const { return log_range_; }
-    unsigned_type range() const { return range_; }
-
-    result_type min_;
-    result_type max_;
-    result_type base_;
-    unsigned_type range_;  // max - min
-    int log_range_;        // ceil(logN(range_))
-
-    static_assert(std::is_integral<IntType>::value,
-                  "Class-template absl::log_uniform_int_distribution<> must be "
-                  "parameterized using an integral type.");
-  };
-
-  log_uniform_int_distribution() : log_uniform_int_distribution(0) {}
-
-  explicit log_uniform_int_distribution(
-      result_type min,
-      result_type max = (std::numeric_limits<result_type>::max)(),
-      result_type base = 2)
-      : param_(min, max, base) {}
-
-  explicit log_uniform_int_distribution(const param_type& p) : param_(p) {}
-
-  void reset() {}
-
-  // generating functions
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p) {
-    return (p.min)() + Generate(g, p);
-  }
-
-  result_type(min)() const { return (param_.min)(); }
-  result_type(max)() const { return (param_.max)(); }
-  result_type base() const { return param_.base(); }
-
-  param_type param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  friend bool operator==(const log_uniform_int_distribution& a,
-                         const log_uniform_int_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const log_uniform_int_distribution& a,
-                         const log_uniform_int_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  // Returns a log-uniform variate in the range [0, p.range()]. The caller
-  // should add min() to shift the result to the correct range.
-  template <typename URNG>
-  unsigned_type Generate(URNG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  param_type param_;
-};
-
-template <typename IntType>
-template <typename URBG>
-typename log_uniform_int_distribution<IntType>::unsigned_type
-log_uniform_int_distribution<IntType>::Generate(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  // sample e over [0, log_range]. Map the results of e to this:
-  // 0 => 0
-  // 1 => [1, b-1]
-  // 2 => [b, (b^2)-1]
-  // n => [b^(n-1)..(b^n)-1]
-  const int e = absl::uniform_int_distribution<int>(0, p.log_range())(g);
-  if (e == 0) {
-    return 0;
-  }
-  const int d = e - 1;
-
-  unsigned_type base_e, top_e;
-  if (p.base() == 2) {
-    base_e = static_cast<unsigned_type>(1) << d;
-
-    top_e = (e >= std::numeric_limits<unsigned_type>::digits)
-                ? (std::numeric_limits<unsigned_type>::max)()
-                : (static_cast<unsigned_type>(1) << e) - 1;
-  } else {
-    const double r = std::pow(p.base(), d);
-    const double s = (r * p.base()) - 1.0;
-
-    base_e =
-        (r > static_cast<double>((std::numeric_limits<unsigned_type>::max)()))
-            ? (std::numeric_limits<unsigned_type>::max)()
-            : static_cast<unsigned_type>(r);
-
-    top_e =
-        (s > static_cast<double>((std::numeric_limits<unsigned_type>::max)()))
-            ? (std::numeric_limits<unsigned_type>::max)()
-            : static_cast<unsigned_type>(s);
-  }
-
-  const unsigned_type lo = (base_e >= p.range()) ? p.range() : base_e;
-  const unsigned_type hi = (top_e >= p.range()) ? p.range() : top_e;
-
-  // choose uniformly over [lo, hi]
-  return absl::uniform_int_distribution<result_type>(lo, hi)(g);
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const log_uniform_int_distribution<IntType>& x) {
-  using stream_type =
-      typename random_internal::stream_format_type<IntType>::type;
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os << static_cast<stream_type>((x.min)()) << os.fill()
-     << static_cast<stream_type>((x.max)()) << os.fill()
-     << static_cast<stream_type>(x.base());
-  return os;
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,       // NOLINT(runtime/references)
-    log_uniform_int_distribution<IntType>& x) {  // NOLINT(runtime/references)
-  using param_type = typename log_uniform_int_distribution<IntType>::param_type;
-  using result_type =
-      typename log_uniform_int_distribution<IntType>::result_type;
-  using stream_type =
-      typename random_internal::stream_format_type<IntType>::type;
-
-  stream_type min;
-  stream_type max;
-  stream_type base;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  is >> min >> max >> base;
-  if (!is.fail()) {
-    x.param(param_type(static_cast<result_type>(min),
-                       static_cast<result_type>(max),
-                       static_cast<result_type>(base)));
-  }
-  return is;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_LOG_UNIFORM_INT_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/log_uniform_int_distribution_test.cc b/third_party/abseil/absl/random/log_uniform_int_distribution_test.cc
deleted file mode 100644
index 5e780d9..0000000
--- a/third_party/abseil/absl/random/log_uniform_int_distribution_test.cc
+++ /dev/null
@@ -1,280 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/log_uniform_int_distribution.h"
-
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_replace.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-template <typename IntType>
-class LogUniformIntDistributionTypeTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<int8_t, int16_t, int32_t, int64_t,  //
-                                  uint8_t, uint16_t, uint32_t, uint64_t>;
-TYPED_TEST_CASE(LogUniformIntDistributionTypeTest, IntTypes);
-
-TYPED_TEST(LogUniformIntDistributionTypeTest, SerializeTest) {
-  using param_type =
-      typename absl::log_uniform_int_distribution<TypeParam>::param_type;
-  using Limits = std::numeric_limits<TypeParam>;
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  for (const auto& param : {
-           param_type(0, 1),                             //
-           param_type(0, 2),                             //
-           param_type(0, 2, 10),                         //
-           param_type(9, 32, 4),                         //
-           param_type(1, 101, 10),                       //
-           param_type(1, Limits::max() / 2),             //
-           param_type(0, Limits::max() - 1),             //
-           param_type(0, Limits::max(), 2),              //
-           param_type(0, Limits::max(), 10),             //
-           param_type(Limits::min(), 0),                 //
-           param_type(Limits::lowest(), Limits::max()),  //
-           param_type(Limits::min(), Limits::max()),     //
-       }) {
-    // Validate parameters.
-    const auto min = param.min();
-    const auto max = param.max();
-    const auto base = param.base();
-    absl::log_uniform_int_distribution<TypeParam> before(min, max, base);
-    EXPECT_EQ(before.min(), param.min());
-    EXPECT_EQ(before.max(), param.max());
-    EXPECT_EQ(before.base(), param.base());
-
-    {
-      absl::log_uniform_int_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-    }
-
-    // Validate stream serialization.
-    std::stringstream ss;
-    ss << before;
-
-    absl::log_uniform_int_distribution<TypeParam> after(3, 6, 17);
-
-    EXPECT_NE(before.max(), after.max());
-    EXPECT_NE(before.base(), after.base());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-    EXPECT_EQ(before.min(), after.min());
-    EXPECT_EQ(before.max(), after.max());
-    EXPECT_EQ(before.base(), after.base());
-    EXPECT_EQ(before.param(), after.param());
-    EXPECT_EQ(before, after);
-
-    // Smoke test.
-    auto sample_min = after.max();
-    auto sample_max = after.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = after(gen);
-      EXPECT_GE(sample, after.min());
-      EXPECT_LE(sample, after.max());
-      if (sample > sample_max) sample_max = sample;
-      if (sample < sample_min) sample_min = sample;
-    }
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrCat("Range: ", +sample_min, ", ", +sample_max));
-  }
-}
-
-using log_uniform_i32 = absl::log_uniform_int_distribution<int32_t>;
-
-class LogUniformIntChiSquaredTest
-    : public testing::TestWithParam<log_uniform_i32::param_type> {
- public:
-  // The ChiSquaredTestImpl provides a chi-squared goodness of fit test for
-  // data generated by the log-uniform-int distribution.
-  double ChiSquaredTestImpl();
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
-};
-
-double LogUniformIntChiSquaredTest::ChiSquaredTestImpl() {
-  using absl::random_internal::kChiSquared;
-
-  const auto& param = GetParam();
-
-  // Check the distribution of L=log(log_uniform_int_distribution, base),
-  // expecting that L is roughly uniformly distributed, that is:
-  //
-  //   P[L=0] ~= P[L=1] ~= ... ~= P[L=log(max)]
-  //
-  // For a total of X entries, each bucket should contain some number of samples
-  // in the interval [X/k - a, X/k + a].
-  //
-  // Where `a` is approximately sqrt(X/k). This is validated by bucketing
-  // according to the log function and using a chi-squared test for uniformity.
-
-  const bool is_2 = (param.base() == 2);
-  const double base_log = 1.0 / std::log(param.base());
-  const auto bucket_index = [base_log, is_2, &param](int32_t x) {
-    uint64_t y = static_cast<uint64_t>(x) - param.min();
-    return (y == 0) ? 0
-                    : is_2 ? static_cast<int>(1 + std::log2(y))
-                           : static_cast<int>(1 + std::log(y) * base_log);
-  };
-  const int max_bucket = bucket_index(param.max());  // inclusive
-  const size_t trials = 15 + (max_bucket + 1) * 10;
-
-  log_uniform_i32 dist(param);
-
-  std::vector<int64_t> buckets(max_bucket + 1);
-  for (size_t i = 0; i < trials; ++i) {
-    const auto sample = dist(rng_);
-    // Check the bounds.
-    ABSL_ASSERT(sample <= dist.max());
-    ABSL_ASSERT(sample >= dist.min());
-    // Convert the output of the generator to one of num_bucket buckets.
-    int bucket = bucket_index(sample);
-    ABSL_ASSERT(bucket <= max_bucket);
-    ++buckets[bucket];
-  }
-
-  // The null-hypothesis is that the distribution is uniform with respect to
-  // log-uniform-int bucketization.
-  const int dof = buckets.size() - 1;
-  const double expected = trials / static_cast<double>(buckets.size());
-
-  const double threshold = absl::random_internal::ChiSquareValue(dof, 0.98);
-
-  double chi_square = absl::random_internal::ChiSquareWithExpected(
-      std::begin(buckets), std::end(buckets), expected);
-
-  const double p = absl::random_internal::ChiSquarePValue(chi_square, dof);
-
-  if (chi_square > threshold) {
-    ABSL_INTERNAL_LOG(INFO, "values");
-    for (size_t i = 0; i < buckets.size(); i++) {
-      ABSL_INTERNAL_LOG(INFO, absl::StrCat(i, ": ", buckets[i]));
-    }
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrFormat("trials=%d\n"
-                                      "%s(data, %d) = %f (%f)\n"
-                                      "%s @ 0.98 = %f",
-                                      trials, kChiSquared, dof, chi_square, p,
-                                      kChiSquared, threshold));
-  }
-  return p;
-}
-
-TEST_P(LogUniformIntChiSquaredTest, MultiTest) {
-  const int kTrials = 5;
-  int failures = 0;
-  for (int i = 0; i < kTrials; i++) {
-    double p_value = ChiSquaredTestImpl();
-    if (p_value < 0.005) {
-      failures++;
-    }
-  }
-
-  // There is a 0.10% chance of producing at least one failure, so raise the
-  // failure threshold high enough to allow for a flake rate < 10,000.
-  EXPECT_LE(failures, 4);
-}
-
-// Generate the parameters for the test.
-std::vector<log_uniform_i32::param_type> GenParams() {
-  using Param = log_uniform_i32::param_type;
-  using Limits = std::numeric_limits<int32_t>;
-
-  return std::vector<Param>{
-      Param{0, 1, 2},
-      Param{1, 1, 2},
-      Param{0, 2, 2},
-      Param{0, 3, 2},
-      Param{0, 4, 2},
-      Param{0, 9, 10},
-      Param{0, 10, 10},
-      Param{0, 11, 10},
-      Param{1, 10, 10},
-      Param{0, (1 << 8) - 1, 2},
-      Param{0, (1 << 8), 2},
-      Param{0, (1 << 30) - 1, 2},
-      Param{-1000, 1000, 10},
-      Param{0, Limits::max(), 2},
-      Param{0, Limits::max(), 3},
-      Param{0, Limits::max(), 10},
-      Param{Limits::min(), 0},
-      Param{Limits::min(), Limits::max(), 2},
-  };
-}
-
-std::string ParamName(
-    const ::testing::TestParamInfo<log_uniform_i32::param_type>& info) {
-  const auto& p = info.param;
-  std::string name =
-      absl::StrCat("min_", p.min(), "__max_", p.max(), "__base_", p.base());
-  return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
-}
-
-INSTANTIATE_TEST_SUITE_P(All, LogUniformIntChiSquaredTest,
-                         ::testing::ValuesIn(GenParams()), ParamName);
-
-// NOTE: absl::log_uniform_int_distribution is not guaranteed to be stable.
-TEST(LogUniformIntDistributionTest, StabilityTest) {
-  using testing::ElementsAre;
-  // absl::uniform_int_distribution stability relies on
-  // absl::random_internal::LeadingSetBit, std::log, std::pow.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(6);
-
-  {
-    absl::log_uniform_int_distribution<int32_t> dist(0, 256);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-    EXPECT_THAT(output, ElementsAre(256, 66, 4, 6, 57, 103));
-  }
-  urbg.reset();
-  {
-    absl::log_uniform_int_distribution<int32_t> dist(0, 256, 10);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-    EXPECT_THAT(output, ElementsAre(8, 4, 0, 0, 0, 69));
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/mock_distributions.h b/third_party/abseil/absl/random/mock_distributions.h
deleted file mode 100644
index 764ab37..0000000
--- a/third_party/abseil/absl/random/mock_distributions.h
+++ /dev/null
@@ -1,266 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: mock_distributions.h
-// -----------------------------------------------------------------------------
-//
-// This file contains mock distribution functions for use alongside an
-// `absl::MockingBitGen` object within the Googletest testing framework. Such
-// mocks are useful to provide deterministic values as return values within
-// (otherwise random) Abseil distribution functions.
-//
-// The return type of each function is a mock expectation object which
-// is used to set the match result.
-//
-// More information about the Googletest testing framework is available at
-// https://github.com/google/googletest
-//
-// EXPECT_CALL and ON_CALL need to be made within the same DLL component as
-// the call to absl::Uniform and related methods, otherwise mocking will fail
-// since the  underlying implementation creates a type-specific pointer which
-// will be distinct across different DLL boundaries.
-//
-// Example:
-//
-//   absl::MockingBitGen mock;
-//   EXPECT_CALL(absl::MockUniform<int>(), Call(mock, 1, 1000))
-//     .WillRepeatedly(testing::ReturnRoundRobin({20, 40}));
-//
-//   EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000), 20);
-//   EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000), 40);
-//   EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000), 20);
-//   EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000), 40);
-
-#ifndef ABSL_RANDOM_MOCK_DISTRIBUTIONS_H_
-#define ABSL_RANDOM_MOCK_DISTRIBUTIONS_H_
-
-#include <limits>
-#include <type_traits>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/distributions.h"
-#include "absl/random/internal/mock_overload_set.h"
-#include "absl/random/mocking_bit_gen.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// absl::MockUniform
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Uniform.
-//
-// `absl::MockUniform` is a class template used in conjunction with Googletest's
-// `ON_CALL()` and `EXPECT_CALL()` macros. To use it, default-construct an
-// instance of it inside `ON_CALL()` or `EXPECT_CALL()`, and use `Call(...)` the
-// same way one would define mocks on a Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockUniform<uint32_t>(), Call(mock))
-//     .WillOnce(Return(123456));
-//  auto x = absl::Uniform<uint32_t>(mock);
-//  assert(x == 123456)
-//
-template <typename R>
-using MockUniform = random_internal::MockOverloadSet<
-    random_internal::UniformDistributionWrapper<R>,
-    R(IntervalClosedOpenTag, MockingBitGen&, R, R),
-    R(IntervalClosedClosedTag, MockingBitGen&, R, R),
-    R(IntervalOpenOpenTag, MockingBitGen&, R, R),
-    R(IntervalOpenClosedTag, MockingBitGen&, R, R), R(MockingBitGen&, R, R),
-    R(MockingBitGen&)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockBernoulli
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Bernoulli.
-//
-// `absl::MockBernoulli` is a class used in conjunction with Googletest's
-// `ON_CALL()` and `EXPECT_CALL()` macros. To use it, default-construct an
-// instance of it inside `ON_CALL()` or `EXPECT_CALL()`, and use `Call(...)` the
-// same way one would define mocks on a Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockBernoulli(), Call(mock, testing::_))
-//     .WillOnce(Return(false));
-//  assert(absl::Bernoulli(mock, 0.5) == false);
-//
-using MockBernoulli =
-    random_internal::MockOverloadSet<absl::bernoulli_distribution,
-                                     bool(MockingBitGen&, double)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockBeta
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Beta.
-//
-// `absl::MockBeta` is a class used in conjunction with Googletest's `ON_CALL()`
-// and `EXPECT_CALL()` macros. To use it, default-construct an instance of it
-// inside `ON_CALL()` or `EXPECT_CALL()`, and use `Call(...)` the same way one
-// would define mocks on a Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockBeta(), Call(mock, 3.0, 2.0))
-//     .WillOnce(Return(0.567));
-//  auto x = absl::Beta<double>(mock, 3.0, 2.0);
-//  assert(x == 0.567);
-//
-template <typename RealType>
-using MockBeta =
-    random_internal::MockOverloadSet<absl::beta_distribution<RealType>,
-                                     RealType(MockingBitGen&, RealType,
-                                              RealType)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockExponential
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Exponential.
-//
-// `absl::MockExponential` is a class template used in conjunction with
-// Googletest's `ON_CALL()` and `EXPECT_CALL()` macros. To use it,
-// default-construct an instance of it inside `ON_CALL()` or `EXPECT_CALL()`,
-// and use `Call(...)` the same way one would define mocks on a
-// Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockExponential<double>(), Call(mock, 0.5))
-//     .WillOnce(Return(12.3456789));
-//  auto x = absl::Exponential<double>(mock, 0.5);
-//  assert(x == 12.3456789)
-//
-template <typename RealType>
-using MockExponential =
-    random_internal::MockOverloadSet<absl::exponential_distribution<RealType>,
-                                     RealType(MockingBitGen&, RealType)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockGaussian
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Gaussian.
-//
-// `absl::MockGaussian` is a class template used in conjunction with
-// Googletest's `ON_CALL()` and `EXPECT_CALL()` macros. To use it,
-// default-construct an instance of it inside `ON_CALL()` or `EXPECT_CALL()`,
-// and use `Call(...)` the same way one would define mocks on a
-// Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockGaussian<double>(), Call(mock, 16.3, 3.3))
-//     .WillOnce(Return(12.3456789));
-//  auto x = absl::Gaussian<double>(mock, 16.3, 3.3);
-//  assert(x == 12.3456789)
-//
-template <typename RealType>
-using MockGaussian =
-    random_internal::MockOverloadSet<absl::gaussian_distribution<RealType>,
-                                     RealType(MockingBitGen&, RealType,
-                                              RealType)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockLogUniform
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::LogUniform.
-//
-// `absl::MockLogUniform` is a class template used in conjunction with
-// Googletest's `ON_CALL()` and `EXPECT_CALL()` macros. To use it,
-// default-construct an instance of it inside `ON_CALL()` or `EXPECT_CALL()`,
-// and use `Call(...)` the same way one would define mocks on a
-// Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockLogUniform<int>(), Call(mock, 10, 10000, 10))
-//     .WillOnce(Return(1221));
-//  auto x = absl::LogUniform<int>(mock, 10, 10000, 10);
-//  assert(x == 1221)
-//
-template <typename IntType>
-using MockLogUniform = random_internal::MockOverloadSet<
-    absl::log_uniform_int_distribution<IntType>,
-    IntType(MockingBitGen&, IntType, IntType, IntType)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockPoisson
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Poisson.
-//
-// `absl::MockPoisson` is a class template used in conjunction with Googletest's
-// `ON_CALL()` and `EXPECT_CALL()` macros. To use it, default-construct an
-// instance of it inside `ON_CALL()` or `EXPECT_CALL()`, and use `Call(...)` the
-// same way one would define mocks on a Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockPoisson<int>(), Call(mock, 2.0))
-//     .WillOnce(Return(1221));
-//  auto x = absl::Poisson<int>(mock, 2.0);
-//  assert(x == 1221)
-//
-template <typename IntType>
-using MockPoisson =
-    random_internal::MockOverloadSet<absl::poisson_distribution<IntType>,
-                                     IntType(MockingBitGen&, double)>;
-
-// -----------------------------------------------------------------------------
-// absl::MockZipf
-// -----------------------------------------------------------------------------
-//
-// Matches calls to absl::Zipf.
-//
-// `absl::MockZipf` is a class template used in conjunction with Googletest's
-// `ON_CALL()` and `EXPECT_CALL()` macros. To use it, default-construct an
-// instance of it inside `ON_CALL()` or `EXPECT_CALL()`, and use `Call(...)` the
-// same way one would define mocks on a Googletest `MockFunction()`.
-//
-// Example:
-//
-//  absl::MockingBitGen mock;
-//  EXPECT_CALL(absl::MockZipf<int>(), Call(mock, 1000000, 2.0, 1.0))
-//     .WillOnce(Return(1221));
-//  auto x = absl::Zipf<int>(mock, 1000000, 2.0, 1.0);
-//  assert(x == 1221)
-//
-template <typename IntType>
-using MockZipf =
-    random_internal::MockOverloadSet<absl::zipf_distribution<IntType>,
-                                     IntType(MockingBitGen&, IntType, double,
-                                             double)>;
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_MOCK_DISTRIBUTIONS_H_
diff --git a/third_party/abseil/absl/random/mock_distributions_test.cc b/third_party/abseil/absl/random/mock_distributions_test.cc
deleted file mode 100644
index de23baf..0000000
--- a/third_party/abseil/absl/random/mock_distributions_test.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/mock_distributions.h"
-
-#include "gtest/gtest.h"
-#include "absl/random/mocking_bit_gen.h"
-#include "absl/random/random.h"
-
-namespace {
-using ::testing::Return;
-
-TEST(MockDistributions, Examples) {
-  absl::MockingBitGen gen;
-
-  EXPECT_NE(absl::Uniform<int>(gen, 1, 1000000), 20);
-  EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 1000000))
-      .WillOnce(Return(20));
-  EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000000), 20);
-
-  EXPECT_NE(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
-  EXPECT_CALL(absl::MockUniform<double>(), Call(gen, 0.0, 100.0))
-      .WillOnce(Return(5.0));
-  EXPECT_EQ(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
-
-  EXPECT_NE(absl::Exponential<double>(gen, 1.0), 42);
-  EXPECT_CALL(absl::MockExponential<double>(), Call(gen, 1.0))
-      .WillOnce(Return(42));
-  EXPECT_EQ(absl::Exponential<double>(gen, 1.0), 42);
-
-  EXPECT_NE(absl::Poisson<int>(gen, 1.0), 500);
-  EXPECT_CALL(absl::MockPoisson<int>(), Call(gen, 1.0)).WillOnce(Return(500));
-  EXPECT_EQ(absl::Poisson<int>(gen, 1.0), 500);
-
-  EXPECT_NE(absl::Bernoulli(gen, 0.000001), true);
-  EXPECT_CALL(absl::MockBernoulli(), Call(gen, 0.000001))
-      .WillOnce(Return(true));
-  EXPECT_EQ(absl::Bernoulli(gen, 0.000001), true);
-
-  EXPECT_NE(absl::Beta<double>(gen, 3.0, 2.0), 0.567);
-  EXPECT_CALL(absl::MockBeta<double>(), Call(gen, 3.0, 2.0))
-      .WillOnce(Return(0.567));
-  EXPECT_EQ(absl::Beta<double>(gen, 3.0, 2.0), 0.567);
-
-  EXPECT_NE(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-  EXPECT_CALL(absl::MockZipf<int>(), Call(gen, 1000000, 2.0, 1.0))
-      .WillOnce(Return(1221));
-  EXPECT_EQ(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-
-  EXPECT_NE(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
-  EXPECT_CALL(absl::MockGaussian<double>(), Call(gen, 0.0, 1.0))
-      .WillOnce(Return(0.001));
-  EXPECT_EQ(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
-
-  EXPECT_NE(absl::LogUniform<int>(gen, 0, 1000000, 2), 2040);
-  EXPECT_CALL(absl::MockLogUniform<int>(), Call(gen, 0, 1000000, 2))
-      .WillOnce(Return(2040));
-  EXPECT_EQ(absl::LogUniform<int>(gen, 0, 1000000, 2), 2040);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/mocking_bit_gen.h b/third_party/abseil/absl/random/mocking_bit_gen.h
deleted file mode 100644
index 6d2f2c8..0000000
--- a/third_party/abseil/absl/random/mocking_bit_gen.h
+++ /dev/null
@@ -1,228 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// mocking_bit_gen.h
-// -----------------------------------------------------------------------------
-//
-// This file includes an `absl::MockingBitGen` class to use as a mock within the
-// Googletest testing framework. Such a mock is useful to provide deterministic
-// values as return values within (otherwise random) Abseil distribution
-// functions. Such determinism within a mock is useful within testing frameworks
-// to test otherwise indeterminate APIs.
-//
-// More information about the Googletest testing framework is available at
-// https://github.com/google/googletest
-
-#ifndef ABSL_RANDOM_MOCKING_BIT_GEN_H_
-#define ABSL_RANDOM_MOCKING_BIT_GEN_H_
-
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/container/flat_hash_map.h"
-#include "absl/meta/type_traits.h"
-#include "absl/random/distributions.h"
-#include "absl/random/internal/distribution_caller.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_join.h"
-#include "absl/types/span.h"
-#include "absl/types/variant.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace random_internal {
-template <typename>
-struct DistributionCaller;
-class MockHelpers;
-
-}  // namespace random_internal
-class BitGenRef;
-
-// MockingBitGen
-//
-// `absl::MockingBitGen` is a mock Uniform Random Bit Generator (URBG) class
-// which can act in place of an `absl::BitGen` URBG within tests using the
-// Googletest testing framework.
-//
-// Usage:
-//
-// Use an `absl::MockingBitGen` along with a mock distribution object (within
-// mock_distributions.h) inside Googletest constructs such as ON_CALL(),
-// EXPECT_TRUE(), etc. to produce deterministic results conforming to the
-// distribution's API contract.
-//
-// Example:
-//
-//  // Mock a call to an `absl::Bernoulli` distribution using Googletest
-//   absl::MockingBitGen bitgen;
-//
-//   ON_CALL(absl::MockBernoulli(), Call(bitgen, 0.5))
-//       .WillByDefault(testing::Return(true));
-//   EXPECT_TRUE(absl::Bernoulli(bitgen, 0.5));
-//
-//  // Mock a call to an `absl::Uniform` distribution within Googletest
-//  absl::MockingBitGen bitgen;
-//
-//   ON_CALL(absl::MockUniform<int>(), Call(bitgen, testing::_, testing::_))
-//       .WillByDefault([] (int low, int high) {
-//           return (low + high) / 2;
-//       });
-//
-//   EXPECT_EQ(absl::Uniform<int>(gen, 0, 10), 5);
-//   EXPECT_EQ(absl::Uniform<int>(gen, 30, 40), 35);
-//
-// At this time, only mock distributions supplied within the Abseil random
-// library are officially supported.
-//
-// EXPECT_CALL and ON_CALL need to be made within the same DLL component as
-// the call to absl::Uniform and related methods, otherwise mocking will fail
-// since the  underlying implementation creates a type-specific pointer which
-// will be distinct across different DLL boundaries.
-//
-class MockingBitGen {
- public:
-  MockingBitGen() = default;
-
-  ~MockingBitGen() {
-    for (const auto& del : deleters_) del();
-  }
-
-  // URBG interface
-  using result_type = absl::BitGen::result_type;
-
-  static constexpr result_type(min)() { return (absl::BitGen::min)(); }
-  static constexpr result_type(max)() { return (absl::BitGen::max)(); }
-  result_type operator()() { return gen_(); }
-
- private:
-  using match_impl_fn = void (*)(void* mock_fn, void* t_erased_arg_tuple,
-                                 void* t_erased_result);
-
-  struct MockData {
-    void* mock_fn = nullptr;
-    match_impl_fn match_impl = nullptr;
-  };
-
-  // GetMockFnType returns the testing::MockFunction for a result and tuple.
-  // This method only exists for type deduction and is otherwise unimplemented.
-  template <typename ResultT, typename... Args>
-  static auto GetMockFnType(ResultT, std::tuple<Args...>)
-      -> ::testing::MockFunction<ResultT(Args...)>;
-
-  // MockFnCaller is a helper method for use with absl::apply to
-  // apply an ArgTupleT to a compatible MockFunction.
-  // NOTE: MockFnCaller is essentially equivalent to the lambda:
-  // [fn](auto... args) { return fn->Call(std::move(args)...)}
-  // however that fails to build on some supported platforms.
-  template <typename ResultT, typename MockFnType, typename Tuple>
-  struct MockFnCaller;
-  // specialization for std::tuple.
-  template <typename ResultT, typename MockFnType, typename... Args>
-  struct MockFnCaller<ResultT, MockFnType, std::tuple<Args...>> {
-    MockFnType* fn;
-    inline ResultT operator()(Args... args) {
-      return fn->Call(std::move(args)...);
-    }
-  };
-
-  // MockingBitGen::RegisterMock
-  //
-  // RegisterMock<ResultT, ArgTupleT>(FastTypeIdType) is the main extension
-  // point for extending the MockingBitGen framework. It provides a mechanism to
-  // install a mock expectation for a function like ResultT(Args...) keyed by
-  // type_idex onto the MockingBitGen context. The key is that the type_index
-  // used to register must match the type index used to call the mock.
-  //
-  // The returned MockFunction<...> type can be used to setup additional
-  // distribution parameters of the expectation.
-  template <typename ResultT, typename ArgTupleT>
-  auto RegisterMock(base_internal::FastTypeIdType type)
-      -> decltype(GetMockFnType(std::declval<ResultT>(),
-                                std::declval<ArgTupleT>()))& {
-    using MockFnType = decltype(
-        GetMockFnType(std::declval<ResultT>(), std::declval<ArgTupleT>()));
-    auto& mock = mocks_[type];
-    if (!mock.mock_fn) {
-      auto* mock_fn = new MockFnType;
-      mock.mock_fn = mock_fn;
-      mock.match_impl = &MatchImpl<ResultT, ArgTupleT>;
-      deleters_.emplace_back([mock_fn] { delete mock_fn; });
-    }
-    return *static_cast<MockFnType*>(mock.mock_fn);
-  }
-
-  // MockingBitGen::MatchImpl<> is a dispatch function which converts the
-  // generic type-erased parameters into a specific mock invocation call.
-  // Requires tuple_args to point to a ArgTupleT, which is a std::tuple<Args...>
-  // used to invoke the mock function.
-  // Requires result to point to a ResultT, which is the result of the call.
-  template <typename ResultT, typename ArgTupleT>
-  static void MatchImpl(/*MockFnType<ResultT, Args...>*/ void* mock_fn,
-                        /*ArgTupleT*/ void* args_tuple,
-                        /*ResultT*/ void* result) {
-    using MockFnType = decltype(
-        GetMockFnType(std::declval<ResultT>(), std::declval<ArgTupleT>()));
-    *static_cast<ResultT*>(result) = absl::apply(
-        MockFnCaller<ResultT, MockFnType, ArgTupleT>{
-            static_cast<MockFnType*>(mock_fn)},
-        *static_cast<ArgTupleT*>(args_tuple));
-  }
-
-  // MockingBitGen::InvokeMock
-  //
-  // InvokeMock(FastTypeIdType, args, result) is the entrypoint for invoking
-  // mocks registered on MockingBitGen.
-  //
-  // When no mocks are registered on the provided FastTypeIdType, returns false.
-  // Otherwise attempts to invoke the mock function ResultT(Args...) that
-  // was previously registered via the type_index.
-  // Requires tuple_args to point to a ArgTupleT, which is a std::tuple<Args...>
-  // used to invoke the mock function.
-  // Requires result to point to a ResultT, which is the result of the call.
-  inline bool InvokeMock(base_internal::FastTypeIdType type, void* args_tuple,
-                         void* result) {
-    // Trigger a mock, if there exists one that matches `param`.
-    auto it = mocks_.find(type);
-    if (it == mocks_.end()) return false;
-    auto* mock_data = static_cast<MockData*>(&it->second);
-    mock_data->match_impl(mock_data->mock_fn, args_tuple, result);
-    return true;
-  }
-
-  absl::flat_hash_map<base_internal::FastTypeIdType, MockData> mocks_;
-  std::vector<std::function<void()>> deleters_;
-  absl::BitGen gen_;
-
-  template <typename>
-  friend struct ::absl::random_internal::DistributionCaller;  // for InvokeMock
-  friend class ::absl::BitGenRef;                             // for InvokeMock
-  friend class ::absl::random_internal::MockHelpers;  // for RegisterMock,
-                                                      // InvokeMock
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_MOCKING_BIT_GEN_H_
diff --git a/third_party/abseil/absl/random/mocking_bit_gen_test.cc b/third_party/abseil/absl/random/mocking_bit_gen_test.cc
deleted file mode 100644
index f0ffc9a..0000000
--- a/third_party/abseil/absl/random/mocking_bit_gen_test.cc
+++ /dev/null
@@ -1,347 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#include "absl/random/mocking_bit_gen.h"
-
-#include <numeric>
-#include <random>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-#include "absl/random/bit_gen_ref.h"
-#include "absl/random/mock_distributions.h"
-#include "absl/random/random.h"
-
-namespace {
-using ::testing::Ne;
-using ::testing::Return;
-
-TEST(BasicMocking, AllDistributionsAreOverridable) {
-  absl::MockingBitGen gen;
-
-  EXPECT_NE(absl::Uniform<int>(gen, 1, 1000000), 20);
-  EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 1000000))
-      .WillOnce(Return(20));
-  EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000000), 20);
-
-  EXPECT_NE(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
-  EXPECT_CALL(absl::MockUniform<double>(), Call(gen, 0.0, 100.0))
-      .WillOnce(Return(5.0));
-  EXPECT_EQ(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
-
-  EXPECT_NE(absl::Exponential<double>(gen, 1.0), 42);
-  EXPECT_CALL(absl::MockExponential<double>(), Call(gen, 1.0))
-      .WillOnce(Return(42));
-  EXPECT_EQ(absl::Exponential<double>(gen, 1.0), 42);
-
-  EXPECT_NE(absl::Poisson<int>(gen, 1.0), 500);
-  EXPECT_CALL(absl::MockPoisson<int>(), Call(gen, 1.0)).WillOnce(Return(500));
-  EXPECT_EQ(absl::Poisson<int>(gen, 1.0), 500);
-
-  EXPECT_NE(absl::Bernoulli(gen, 0.000001), true);
-  EXPECT_CALL(absl::MockBernoulli(), Call(gen, 0.000001))
-      .WillOnce(Return(true));
-  EXPECT_EQ(absl::Bernoulli(gen, 0.000001), true);
-
-  EXPECT_NE(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-  EXPECT_CALL(absl::MockZipf<int>(), Call(gen, 1000000, 2.0, 1.0))
-      .WillOnce(Return(1221));
-  EXPECT_EQ(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-
-  EXPECT_NE(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
-  EXPECT_CALL(absl::MockGaussian<double>(), Call(gen, 0.0, 1.0))
-      .WillOnce(Return(0.001));
-  EXPECT_EQ(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
-
-  EXPECT_NE(absl::LogUniform<int>(gen, 0, 1000000, 2), 500000);
-  EXPECT_CALL(absl::MockLogUniform<int>(), Call(gen, 0, 1000000, 2))
-      .WillOnce(Return(500000));
-  EXPECT_EQ(absl::LogUniform<int>(gen, 0, 1000000, 2), 500000);
-}
-
-TEST(BasicMocking, OnDistribution) {
-  absl::MockingBitGen gen;
-
-  EXPECT_NE(absl::Uniform<int>(gen, 1, 1000000), 20);
-  ON_CALL(absl::MockUniform<int>(), Call(gen, 1, 1000000))
-      .WillByDefault(Return(20));
-  EXPECT_EQ(absl::Uniform<int>(gen, 1, 1000000), 20);
-
-  EXPECT_NE(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
-  ON_CALL(absl::MockUniform<double>(), Call(gen, 0.0, 100.0))
-      .WillByDefault(Return(5.0));
-  EXPECT_EQ(absl::Uniform<double>(gen, 0.0, 100.0), 5.0);
-
-  EXPECT_NE(absl::Exponential<double>(gen, 1.0), 42);
-  ON_CALL(absl::MockExponential<double>(), Call(gen, 1.0))
-      .WillByDefault(Return(42));
-  EXPECT_EQ(absl::Exponential<double>(gen, 1.0), 42);
-
-  EXPECT_NE(absl::Poisson<int>(gen, 1.0), 500);
-  ON_CALL(absl::MockPoisson<int>(), Call(gen, 1.0)).WillByDefault(Return(500));
-  EXPECT_EQ(absl::Poisson<int>(gen, 1.0), 500);
-
-  EXPECT_NE(absl::Bernoulli(gen, 0.000001), true);
-  ON_CALL(absl::MockBernoulli(), Call(gen, 0.000001))
-      .WillByDefault(Return(true));
-  EXPECT_EQ(absl::Bernoulli(gen, 0.000001), true);
-
-  EXPECT_NE(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-  ON_CALL(absl::MockZipf<int>(), Call(gen, 1000000, 2.0, 1.0))
-      .WillByDefault(Return(1221));
-  EXPECT_EQ(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-
-  EXPECT_NE(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
-  ON_CALL(absl::MockGaussian<double>(), Call(gen, 0.0, 1.0))
-      .WillByDefault(Return(0.001));
-  EXPECT_EQ(absl::Gaussian<double>(gen, 0.0, 1.0), 0.001);
-
-  EXPECT_NE(absl::LogUniform<int>(gen, 0, 1000000, 2), 2040);
-  ON_CALL(absl::MockLogUniform<int>(), Call(gen, 0, 1000000, 2))
-      .WillByDefault(Return(2040));
-  EXPECT_EQ(absl::LogUniform<int>(gen, 0, 1000000, 2), 2040);
-}
-
-TEST(BasicMocking, GMockMatchers) {
-  absl::MockingBitGen gen;
-
-  EXPECT_NE(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-  ON_CALL(absl::MockZipf<int>(), Call(gen, 1000000, 2.0, 1.0))
-      .WillByDefault(Return(1221));
-  EXPECT_EQ(absl::Zipf<int>(gen, 1000000, 2.0, 1.0), 1221);
-}
-
-TEST(BasicMocking, OverridesWithMultipleGMockExpectations) {
-  absl::MockingBitGen gen;
-
-  EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 10000))
-      .WillOnce(Return(20))
-      .WillOnce(Return(40))
-      .WillOnce(Return(60));
-  EXPECT_EQ(absl::Uniform(gen, 1, 10000), 20);
-  EXPECT_EQ(absl::Uniform(gen, 1, 10000), 40);
-  EXPECT_EQ(absl::Uniform(gen, 1, 10000), 60);
-}
-
-TEST(BasicMocking, DefaultArgument) {
-  absl::MockingBitGen gen;
-
-  ON_CALL(absl::MockExponential<double>(), Call(gen, 1.0))
-      .WillByDefault(Return(200));
-
-  EXPECT_EQ(absl::Exponential<double>(gen), 200);
-  EXPECT_EQ(absl::Exponential<double>(gen, 1.0), 200);
-}
-
-TEST(BasicMocking, MultipleGenerators) {
-  auto get_value = [](absl::BitGenRef gen_ref) {
-    return absl::Uniform(gen_ref, 1, 1000000);
-  };
-  absl::MockingBitGen unmocked_generator;
-  absl::MockingBitGen mocked_with_3;
-  absl::MockingBitGen mocked_with_11;
-
-  EXPECT_CALL(absl::MockUniform<int>(), Call(mocked_with_3, 1, 1000000))
-      .WillOnce(Return(3))
-      .WillRepeatedly(Return(17));
-  EXPECT_CALL(absl::MockUniform<int>(), Call(mocked_with_11, 1, 1000000))
-      .WillOnce(Return(11))
-      .WillRepeatedly(Return(17));
-
-  // Ensure that unmocked generator generates neither value.
-  int unmocked_value = get_value(unmocked_generator);
-  EXPECT_NE(unmocked_value, 3);
-  EXPECT_NE(unmocked_value, 11);
-  // Mocked generators should generate their mocked values.
-  EXPECT_EQ(get_value(mocked_with_3), 3);
-  EXPECT_EQ(get_value(mocked_with_11), 11);
-  // Ensure that the mocks have expired.
-  EXPECT_NE(get_value(mocked_with_3), 3);
-  EXPECT_NE(get_value(mocked_with_11), 11);
-}
-
-TEST(BasicMocking, MocksNotTrigeredForIncorrectTypes) {
-  absl::MockingBitGen gen;
-  EXPECT_CALL(absl::MockUniform<uint32_t>(), Call(gen)).WillOnce(Return(42));
-
-  EXPECT_NE(absl::Uniform<uint16_t>(gen), 42);  // Not mocked
-  EXPECT_EQ(absl::Uniform<uint32_t>(gen), 42);  // Mock triggered
-}
-
-TEST(BasicMocking, FailsOnUnsatisfiedMocks) {
-  EXPECT_NONFATAL_FAILURE(
-      []() {
-        absl::MockingBitGen gen;
-        EXPECT_CALL(absl::MockExponential<double>(), Call(gen, 1.0))
-            .WillOnce(Return(3.0));
-        // Does not call absl::Exponential().
-      }(),
-      "unsatisfied and active");
-}
-
-TEST(OnUniform, RespectsUniformIntervalSemantics) {
-  absl::MockingBitGen gen;
-
-  EXPECT_CALL(absl::MockUniform<int>(),
-              Call(absl::IntervalClosed, gen, 1, 1000000))
-      .WillOnce(Return(301));
-  EXPECT_NE(absl::Uniform(gen, 1, 1000000), 301);  // Not mocked
-  EXPECT_EQ(absl::Uniform(absl::IntervalClosed, gen, 1, 1000000), 301);
-}
-
-TEST(OnUniform, RespectsNoArgUnsignedShorthand) {
-  absl::MockingBitGen gen;
-  EXPECT_CALL(absl::MockUniform<uint32_t>(), Call(gen)).WillOnce(Return(42));
-  EXPECT_EQ(absl::Uniform<uint32_t>(gen), 42);
-}
-
-TEST(RepeatedlyModifier, ForceSnakeEyesForManyDice) {
-  auto roll_some_dice = [](absl::BitGenRef gen_ref) {
-    std::vector<int> results(16);
-    for (auto& r : results) {
-      r = absl::Uniform(absl::IntervalClosed, gen_ref, 1, 6);
-    }
-    return results;
-  };
-  std::vector<int> results;
-  absl::MockingBitGen gen;
-
-  // Without any mocked calls, not all dice roll a "6".
-  results = roll_some_dice(gen);
-  EXPECT_LT(std::accumulate(std::begin(results), std::end(results), 0),
-            results.size() * 6);
-
-  // Verify that we can force all "6"-rolls, with mocking.
-  ON_CALL(absl::MockUniform<int>(), Call(absl::IntervalClosed, gen, 1, 6))
-      .WillByDefault(Return(6));
-  results = roll_some_dice(gen);
-  EXPECT_EQ(std::accumulate(std::begin(results), std::end(results), 0),
-            results.size() * 6);
-}
-
-TEST(WillOnce, DistinctCounters) {
-  absl::MockingBitGen gen;
-  EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 1000000))
-      .Times(3)
-      .WillRepeatedly(Return(0));
-  EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1000001, 2000000))
-      .Times(3)
-      .WillRepeatedly(Return(1));
-  EXPECT_EQ(absl::Uniform(gen, 1000001, 2000000), 1);
-  EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 0);
-  EXPECT_EQ(absl::Uniform(gen, 1000001, 2000000), 1);
-  EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 0);
-  EXPECT_EQ(absl::Uniform(gen, 1000001, 2000000), 1);
-  EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 0);
-}
-
-TEST(TimesModifier, ModifierSaturatesAndExpires) {
-  EXPECT_NONFATAL_FAILURE(
-      []() {
-        absl::MockingBitGen gen;
-        EXPECT_CALL(absl::MockUniform<int>(), Call(gen, 1, 1000000))
-            .Times(3)
-            .WillRepeatedly(Return(15))
-            .RetiresOnSaturation();
-
-        EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 15);
-        EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 15);
-        EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 15);
-        // Times(3) has expired - Should get a different value now.
-
-        EXPECT_NE(absl::Uniform(gen, 1, 1000000), 15);
-      }(),
-      "");
-}
-
-TEST(TimesModifier, Times0) {
-  absl::MockingBitGen gen;
-  EXPECT_CALL(absl::MockBernoulli(), Call(gen, 0.0)).Times(0);
-  EXPECT_CALL(absl::MockPoisson<int>(), Call(gen, 1.0)).Times(0);
-}
-
-TEST(AnythingMatcher, MatchesAnyArgument) {
-  using testing::_;
-
-  {
-    absl::MockingBitGen gen;
-    ON_CALL(absl::MockUniform<int>(), Call(absl::IntervalClosed, gen, _, 1000))
-        .WillByDefault(Return(11));
-    ON_CALL(absl::MockUniform<int>(),
-            Call(absl::IntervalClosed, gen, _, Ne(1000)))
-        .WillByDefault(Return(99));
-
-    EXPECT_EQ(absl::Uniform(absl::IntervalClosed, gen, 10, 1000000), 99);
-    EXPECT_EQ(absl::Uniform(absl::IntervalClosed, gen, 10, 1000), 11);
-  }
-
-  {
-    absl::MockingBitGen gen;
-    ON_CALL(absl::MockUniform<int>(), Call(gen, 1, _))
-        .WillByDefault(Return(25));
-    ON_CALL(absl::MockUniform<int>(), Call(gen, Ne(1), _))
-        .WillByDefault(Return(99));
-    EXPECT_EQ(absl::Uniform(gen, 3, 1000000), 99);
-    EXPECT_EQ(absl::Uniform(gen, 1, 1000000), 25);
-  }
-
-  {
-    absl::MockingBitGen gen;
-    ON_CALL(absl::MockUniform<int>(), Call(gen, _, _))
-        .WillByDefault(Return(145));
-    EXPECT_EQ(absl::Uniform(gen, 1, 1000), 145);
-    EXPECT_EQ(absl::Uniform(gen, 10, 1000), 145);
-    EXPECT_EQ(absl::Uniform(gen, 100, 1000), 145);
-  }
-}
-
-TEST(AnythingMatcher, WithWillByDefault) {
-  using testing::_;
-  absl::MockingBitGen gen;
-  std::vector<int> values = {11, 22, 33, 44, 55, 66, 77, 88, 99, 1010};
-
-  ON_CALL(absl::MockUniform<size_t>(), Call(gen, 0, _))
-      .WillByDefault(Return(0));
-  for (int i = 0; i < 100; i++) {
-    auto& elem = values[absl::Uniform(gen, 0u, values.size())];
-    EXPECT_EQ(elem, 11);
-  }
-}
-
-TEST(BasicMocking, WillByDefaultWithArgs) {
-  using testing::_;
-
-  absl::MockingBitGen gen;
-  ON_CALL(absl::MockPoisson<int>(), Call(gen, _))
-      .WillByDefault(
-          [](double lambda) { return static_cast<int>(lambda * 10); });
-  EXPECT_EQ(absl::Poisson<int>(gen, 1.7), 17);
-  EXPECT_EQ(absl::Poisson<int>(gen, 0.03), 0);
-}
-
-TEST(MockingBitGen, InSequenceSucceedsInOrder) {
-  absl::MockingBitGen gen;
-
-  testing::InSequence seq;
-
-  EXPECT_CALL(absl::MockPoisson<int>(), Call(gen, 1.0)).WillOnce(Return(3));
-  EXPECT_CALL(absl::MockPoisson<int>(), Call(gen, 2.0)).WillOnce(Return(4));
-
-  EXPECT_EQ(absl::Poisson<int>(gen, 1.0), 3);
-  EXPECT_EQ(absl::Poisson<int>(gen, 2.0), 4);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/poisson_distribution.h b/third_party/abseil/absl/random/poisson_distribution.h
deleted file mode 100644
index cb5f5d5..0000000
--- a/third_party/abseil/absl/random/poisson_distribution.h
+++ /dev/null
@@ -1,258 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_POISSON_DISTRIBUTION_H_
-#define ABSL_RANDOM_POISSON_DISTRIBUTION_H_
-
-#include <cassert>
-#include <cmath>
-#include <istream>
-#include <limits>
-#include <ostream>
-#include <type_traits>
-
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/fastmath.h"
-#include "absl/random/internal/generate_real.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::poisson_distribution:
-// Generates discrete variates conforming to a Poisson distribution.
-//   p(n) = (mean^n / n!) exp(-mean)
-//
-// Depending on the parameter, the distribution selects one of the following
-// algorithms:
-// * The standard algorithm, attributed to Knuth, extended using a split method
-// for larger values
-// * The "Ratio of Uniforms as a convenient method for sampling from classical
-// discrete distributions", Stadlober, 1989.
-// http://www.sciencedirect.com/science/article/pii/0377042790903495
-//
-// NOTE: param_type.mean() is a double, which permits values larger than
-// poisson_distribution<IntType>::max(), however this should be avoided and
-// the distribution results are limited to the max() value.
-//
-// The goals of this implementation are to provide good performance while still
-// beig thread-safe: This limits the implementation to not using lgamma provided
-// by <math.h>.
-//
-template <typename IntType = int>
-class poisson_distribution {
- public:
-  using result_type = IntType;
-
-  class param_type {
-   public:
-    using distribution_type = poisson_distribution;
-    explicit param_type(double mean = 1.0);
-
-    double mean() const { return mean_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.mean_ == b.mean_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class poisson_distribution;
-
-    double mean_;
-    double emu_;  // e ^ -mean_
-    double lmu_;  // ln(mean_)
-    double s_;
-    double log_k_;
-    int split_;
-
-    static_assert(std::is_integral<IntType>::value,
-                  "Class-template absl::poisson_distribution<> must be "
-                  "parameterized using an integral type.");
-  };
-
-  poisson_distribution() : poisson_distribution(1.0) {}
-
-  explicit poisson_distribution(double mean) : param_(mean) {}
-
-  explicit poisson_distribution(const param_type& p) : param_(p) {}
-
-  void reset() {}
-
-  // generating functions
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  param_type param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  result_type(min)() const { return 0; }
-  result_type(max)() const { return (std::numeric_limits<result_type>::max)(); }
-
-  double mean() const { return param_.mean(); }
-
-  friend bool operator==(const poisson_distribution& a,
-                         const poisson_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const poisson_distribution& a,
-                         const poisson_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  param_type param_;
-  random_internal::FastUniformBits<uint64_t> fast_u64_;
-};
-
-// -----------------------------------------------------------------------------
-// Implementation details follow
-// -----------------------------------------------------------------------------
-
-template <typename IntType>
-poisson_distribution<IntType>::param_type::param_type(double mean)
-    : mean_(mean), split_(0) {
-  assert(mean >= 0);
-  assert(mean <= (std::numeric_limits<result_type>::max)());
-  // As a defensive measure, avoid large values of the mean.  The rejection
-  // algorithm used does not support very large values well.  It my be worth
-  // changing algorithms to better deal with these cases.
-  assert(mean <= 1e10);
-  if (mean_ < 10) {
-    // For small lambda, use the knuth method.
-    split_ = 1;
-    emu_ = std::exp(-mean_);
-  } else if (mean_ <= 50) {
-    // Use split-knuth method.
-    split_ = 1 + static_cast<int>(mean_ / 10.0);
-    emu_ = std::exp(-mean_ / static_cast<double>(split_));
-  } else {
-    // Use ratio of uniforms method.
-    constexpr double k2E = 0.7357588823428846;
-    constexpr double kSA = 0.4494580810294493;
-
-    lmu_ = std::log(mean_);
-    double a = mean_ + 0.5;
-    s_ = kSA + std::sqrt(k2E * a);
-    const double mode = std::ceil(mean_) - 1;
-    log_k_ = lmu_ * mode - absl::random_internal::StirlingLogFactorial(mode);
-  }
-}
-
-template <typename IntType>
-template <typename URBG>
-typename poisson_distribution<IntType>::result_type
-poisson_distribution<IntType>::operator()(
-    URBG& g,  // NOLINT(runtime/references)
-    const param_type& p) {
-  using random_internal::GeneratePositiveTag;
-  using random_internal::GenerateRealFromBits;
-  using random_internal::GenerateSignedTag;
-
-  if (p.split_ != 0) {
-    // Use Knuth's algorithm with range splitting to avoid floating-point
-    // errors. Knuth's algorithm is: Ui is a sequence of uniform variates on
-    // (0,1); return the number of variates required for product(Ui) <
-    // exp(-lambda).
-    //
-    // The expected number of variates required for Knuth's method can be
-    // computed as follows:
-    // The expected value of U is 0.5, so solving for 0.5^n < exp(-lambda) gives
-    // the expected number of uniform variates
-    // required for a given lambda, which is:
-    //  lambda = [2, 5,  9, 10, 11, 12, 13, 14, 15, 16, 17]
-    //  n      = [3, 8, 13, 15, 16, 18, 19, 21, 22, 24, 25]
-    //
-    result_type n = 0;
-    for (int split = p.split_; split > 0; --split) {
-      double r = 1.0;
-      do {
-        r *= GenerateRealFromBits<double, GeneratePositiveTag, true>(
-            fast_u64_(g));  // U(-1, 0)
-        ++n;
-      } while (r > p.emu_);
-      --n;
-    }
-    return n;
-  }
-
-  // Use ratio of uniforms method.
-  //
-  // Let u ~ Uniform(0, 1), v ~ Uniform(-1, 1),
-  //     a = lambda + 1/2,
-  //     s = 1.5 - sqrt(3/e) + sqrt(2(lambda + 1/2)/e),
-  //     x = s * v/u + a.
-  // P(floor(x) = k | u^2 < f(floor(x))/k), where
-  // f(m) = lambda^m exp(-lambda)/ m!, for 0 <= m, and f(m) = 0 otherwise,
-  // and k = max(f).
-  const double a = p.mean_ + 0.5;
-  for (;;) {
-    const double u = GenerateRealFromBits<double, GeneratePositiveTag, false>(
-        fast_u64_(g));  // U(0, 1)
-    const double v = GenerateRealFromBits<double, GenerateSignedTag, false>(
-        fast_u64_(g));  // U(-1, 1)
-
-    const double x = std::floor(p.s_ * v / u + a);
-    if (x < 0) continue;  // f(negative) = 0
-    const double rhs = x * p.lmu_;
-    // clang-format off
-    double s = (x <= 1.0) ? 0.0
-             : (x == 2.0) ? 0.693147180559945
-             : absl::random_internal::StirlingLogFactorial(x);
-    // clang-format on
-    const double lhs = 2.0 * std::log(u) + p.log_k_ + s;
-    if (lhs < rhs) {
-      return x > (max)() ? (max)()
-                         : static_cast<result_type>(x);  // f(x)/k >= u^2
-    }
-  }
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const poisson_distribution<IntType>& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<double>::kPrecision);
-  os << x.mean();
-  return os;
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    poisson_distribution<IntType>& x) {     // NOLINT(runtime/references)
-  using param_type = typename poisson_distribution<IntType>::param_type;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  double mean = random_internal::read_floating_point<double>(is);
-  if (!is.fail()) {
-    x.param(param_type(mean));
-  }
-  return is;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_POISSON_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/poisson_distribution_test.cc b/third_party/abseil/absl/random/poisson_distribution_test.cc
deleted file mode 100644
index 8baabd1..0000000
--- a/third_party/abseil/absl/random/poisson_distribution_test.cc
+++ /dev/null
@@ -1,573 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/poisson_distribution.h"
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/container/flat_hash_map.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_replace.h"
-#include "absl/strings/strip.h"
-
-// Notes about generating poisson variates:
-//
-// It is unlikely that any implementation of std::poisson_distribution
-// will be stable over time and across library implementations. For instance
-// the three different poisson variate generators listed below all differ:
-//
-// https://github.com/ampl/gsl/tree/master/randist/poisson.c
-// * GSL uses a gamma + binomial + knuth method to compute poisson variates.
-//
-// https://github.com/gcc-mirror/gcc/blob/master/libstdc%2B%2B-v3/include/bits/random.tcc
-// * GCC uses the Devroye rejection algorithm, based on
-// Devroye, L. Non-Uniform Random Variates Generation. Springer-Verlag,
-// New York, 1986, Ch. X, Sects. 3.3 & 3.4 (+ Errata!), ~p.511
-//   http://www.nrbook.com/devroye/
-//
-// https://github.com/llvm-mirror/libcxx/blob/master/include/random
-// * CLANG uses a different rejection method, which appears to include a
-// normal-distribution approximation and an exponential distribution to
-// compute the threshold, including a similar factorial approximation to this
-// one, but it is unclear where the algorithm comes from, exactly.
-//
-
-namespace {
-
-using absl::random_internal::kChiSquared;
-
-// The PoissonDistributionInterfaceTest provides a basic test that
-// absl::poisson_distribution conforms to the interface and serialization
-// requirements imposed by [rand.req.dist] for the common integer types.
-
-template <typename IntType>
-class PoissonDistributionInterfaceTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<int, int8_t, int16_t, int32_t, int64_t,
-                                  uint8_t, uint16_t, uint32_t, uint64_t>;
-TYPED_TEST_CASE(PoissonDistributionInterfaceTest, IntTypes);
-
-TYPED_TEST(PoissonDistributionInterfaceTest, SerializeTest) {
-  using param_type = typename absl::poisson_distribution<TypeParam>::param_type;
-  const double kMax =
-      std::min(1e10 /* assertion limit */,
-               static_cast<double>(std::numeric_limits<TypeParam>::max()));
-
-  const double kParams[] = {
-      // Cases around 1.
-      1,                         //
-      std::nextafter(1.0, 0.0),  // 1 - epsilon
-      std::nextafter(1.0, 2.0),  // 1 + epsilon
-      // Arbitrary values.
-      1e-8, 1e-4,
-      0.0000005,  // ~7.2e-7
-      0.2,        // ~0.2x
-      0.5,        // 0.72
-      2,          // ~2.8
-      20,         // 3x ~9.6
-      100, 1e4, 1e8, 1.5e9, 1e20,
-      // Boundary cases.
-      std::numeric_limits<double>::max(),
-      std::numeric_limits<double>::epsilon(),
-      std::nextafter(std::numeric_limits<double>::min(),
-                     1.0),                        // min + epsilon
-      std::numeric_limits<double>::min(),         // smallest normal
-      std::numeric_limits<double>::denorm_min(),  // smallest denorm
-      std::numeric_limits<double>::min() / 2,     // denorm
-      std::nextafter(std::numeric_limits<double>::min(),
-                     0.0),  // denorm_max
-  };
-
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  for (const double m : kParams) {
-    const double mean = std::min(kMax, m);
-    const param_type param(mean);
-
-    // Validate parameters.
-    absl::poisson_distribution<TypeParam> before(mean);
-    EXPECT_EQ(before.mean(), param.mean());
-
-    {
-      absl::poisson_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-      EXPECT_EQ(via_param.param(), before.param());
-    }
-
-    // Smoke test.
-    auto sample_min = before.max();
-    auto sample_max = before.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = before(gen);
-      EXPECT_GE(sample, before.min());
-      EXPECT_LE(sample, before.max());
-      if (sample > sample_max) sample_max = sample;
-      if (sample < sample_min) sample_min = sample;
-    }
-
-    ABSL_INTERNAL_LOG(INFO, absl::StrCat("Range {", param.mean(), "}: ",
-                                         +sample_min, ", ", +sample_max));
-
-    // Validate stream serialization.
-    std::stringstream ss;
-    ss << before;
-
-    absl::poisson_distribution<TypeParam> after(3.8);
-
-    EXPECT_NE(before.mean(), after.mean());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-    EXPECT_EQ(before.mean(), after.mean())  //
-        << ss.str() << " "                  //
-        << (ss.good() ? "good " : "")       //
-        << (ss.bad() ? "bad " : "")         //
-        << (ss.eof() ? "eof " : "")         //
-        << (ss.fail() ? "fail " : "");
-  }
-}
-
-// See http://www.itl.nist.gov/div898/handbook/eda/section3/eda366j.htm
-
-class PoissonModel {
- public:
-  explicit PoissonModel(double mean) : mean_(mean) {}
-
-  double mean() const { return mean_; }
-  double variance() const { return mean_; }
-  double stddev() const { return std::sqrt(variance()); }
-  double skew() const { return 1.0 / mean_; }
-  double kurtosis() const { return 3.0 + 1.0 / mean_; }
-
-  // InitCDF() initializes the CDF for the distribution parameters.
-  void InitCDF();
-
-  // The InverseCDF, or the Percent-point function returns x, P(x) < v.
-  struct CDF {
-    size_t index;
-    double pmf;
-    double cdf;
-  };
-  CDF InverseCDF(double p) {
-    CDF target{0, 0, p};
-    auto it = std::upper_bound(
-        std::begin(cdf_), std::end(cdf_), target,
-        [](const CDF& a, const CDF& b) { return a.cdf < b.cdf; });
-    return *it;
-  }
-
-  void LogCDF() {
-    ABSL_INTERNAL_LOG(INFO, absl::StrCat("CDF (mean = ", mean_, ")"));
-    for (const auto c : cdf_) {
-      ABSL_INTERNAL_LOG(INFO,
-                        absl::StrCat(c.index, ": pmf=", c.pmf, " cdf=", c.cdf));
-    }
-  }
-
- private:
-  const double mean_;
-
-  std::vector<CDF> cdf_;
-};
-
-// The goal is to compute an InverseCDF function, or percent point function for
-// the poisson distribution, and use that to partition our output into equal
-// range buckets.  However there is no closed form solution for the inverse cdf
-// for poisson distributions (the closest is the incomplete gamma function).
-// Instead, `InitCDF` iteratively computes the PMF and the CDF. This enables
-// searching for the bucket points.
-void PoissonModel::InitCDF() {
-  if (!cdf_.empty()) {
-    // State already initialized.
-    return;
-  }
-  ABSL_ASSERT(mean_ < 201.0);
-
-  const size_t max_i = 50 * stddev() + mean();
-  const double e_neg_mean = std::exp(-mean());
-  ABSL_ASSERT(e_neg_mean > 0);
-
-  double d = 1;
-  double last_result = e_neg_mean;
-  double cumulative = e_neg_mean;
-  if (e_neg_mean > 1e-10) {
-    cdf_.push_back({0, e_neg_mean, cumulative});
-  }
-  for (size_t i = 1; i < max_i; i++) {
-    d *= (mean() / i);
-    double result = e_neg_mean * d;
-    cumulative += result;
-    if (result < 1e-10 && result < last_result && cumulative > 0.999999) {
-      break;
-    }
-    if (result > 1e-7) {
-      cdf_.push_back({i, result, cumulative});
-    }
-    last_result = result;
-  }
-  ABSL_ASSERT(!cdf_.empty());
-}
-
-// PoissonDistributionZTest implements a z-test for the poisson distribution.
-
-struct ZParam {
-  double mean;
-  double p_fail;   // Z-Test probability of failure.
-  int trials;      // Z-Test trials.
-  size_t samples;  // Z-Test samples.
-};
-
-class PoissonDistributionZTest : public testing::TestWithParam<ZParam>,
-                                 public PoissonModel {
- public:
-  PoissonDistributionZTest() : PoissonModel(GetParam().mean) {}
-
-  // ZTestImpl provides a basic z-squared test of the mean vs. expected
-  // mean for data generated by the poisson distribution.
-  template <typename D>
-  bool SingleZTest(const double p, const size_t samples);
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
-};
-
-template <typename D>
-bool PoissonDistributionZTest::SingleZTest(const double p,
-                                           const size_t samples) {
-  D dis(mean());
-
-  absl::flat_hash_map<int32_t, int> buckets;
-  std::vector<double> data;
-  data.reserve(samples);
-  for (int j = 0; j < samples; j++) {
-    const auto x = dis(rng_);
-    buckets[x]++;
-    data.push_back(x);
-  }
-
-  // The null-hypothesis is that the distribution is a poisson distribution with
-  // the provided mean (not estimated from the data).
-  const auto m = absl::random_internal::ComputeDistributionMoments(data);
-  const double max_err = absl::random_internal::MaxErrorTolerance(p);
-  const double z = absl::random_internal::ZScore(mean(), m);
-  const bool pass = absl::random_internal::Near("z", z, 0.0, max_err);
-
-  if (!pass) {
-    ABSL_INTERNAL_LOG(
-        INFO, absl::StrFormat("p=%f max_err=%f\n"
-                              " mean=%f vs. %f\n"
-                              " stddev=%f vs. %f\n"
-                              " skewness=%f vs. %f\n"
-                              " kurtosis=%f vs. %f\n"
-                              " z=%f",
-                              p, max_err, m.mean, mean(), std::sqrt(m.variance),
-                              stddev(), m.skewness, skew(), m.kurtosis,
-                              kurtosis(), z));
-  }
-  return pass;
-}
-
-TEST_P(PoissonDistributionZTest, AbslPoissonDistribution) {
-  const auto& param = GetParam();
-  const int expected_failures =
-      std::max(1, static_cast<int>(std::ceil(param.trials * param.p_fail)));
-  const double p = absl::random_internal::RequiredSuccessProbability(
-      param.p_fail, param.trials);
-
-  int failures = 0;
-  for (int i = 0; i < param.trials; i++) {
-    failures +=
-        SingleZTest<absl::poisson_distribution<int32_t>>(p, param.samples) ? 0
-                                                                           : 1;
-  }
-  EXPECT_LE(failures, expected_failures);
-}
-
-std::vector<ZParam> GetZParams() {
-  // These values have been adjusted from the "exact" computed values to reduce
-  // failure rates.
-  //
-  // It turns out that the actual values are not as close to the expected values
-  // as would be ideal.
-  return std::vector<ZParam>({
-      // Knuth method.
-      ZParam{0.5, 0.01, 100, 1000},
-      ZParam{1.0, 0.01, 100, 1000},
-      ZParam{10.0, 0.01, 100, 5000},
-      // Split-knuth method.
-      ZParam{20.0, 0.01, 100, 10000},
-      ZParam{50.0, 0.01, 100, 10000},
-      // Ratio of gaussians method.
-      ZParam{51.0, 0.01, 100, 10000},
-      ZParam{200.0, 0.05, 10, 100000},
-      ZParam{100000.0, 0.05, 10, 1000000},
-  });
-}
-
-std::string ZParamName(const ::testing::TestParamInfo<ZParam>& info) {
-  const auto& p = info.param;
-  std::string name = absl::StrCat("mean_", absl::SixDigits(p.mean));
-  return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
-}
-
-INSTANTIATE_TEST_SUITE_P(All, PoissonDistributionZTest,
-                         ::testing::ValuesIn(GetZParams()), ZParamName);
-
-// The PoissonDistributionChiSquaredTest class provides a basic test framework
-// for variates generated by a conforming poisson_distribution.
-class PoissonDistributionChiSquaredTest : public testing::TestWithParam<double>,
-                                          public PoissonModel {
- public:
-  PoissonDistributionChiSquaredTest() : PoissonModel(GetParam()) {}
-
-  // The ChiSquaredTestImpl provides a chi-squared goodness of fit test for data
-  // generated by the poisson distribution.
-  template <typename D>
-  double ChiSquaredTestImpl();
-
- private:
-  void InitChiSquaredTest(const double buckets);
-
-  std::vector<size_t> cutoffs_;
-  std::vector<double> expected_;
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
-};
-
-void PoissonDistributionChiSquaredTest::InitChiSquaredTest(
-    const double buckets) {
-  if (!cutoffs_.empty() && !expected_.empty()) {
-    return;
-  }
-  InitCDF();
-
-  // The code below finds cuttoffs that yield approximately equally-sized
-  // buckets to the extent that it is possible. However for poisson
-  // distributions this is particularly challenging for small mean parameters.
-  // Track the expected proportion of items in each bucket.
-  double last_cdf = 0;
-  const double inc = 1.0 / buckets;
-  for (double p = inc; p <= 1.0; p += inc) {
-    auto result = InverseCDF(p);
-    if (!cutoffs_.empty() && cutoffs_.back() == result.index) {
-      continue;
-    }
-    double d = result.cdf - last_cdf;
-    cutoffs_.push_back(result.index);
-    expected_.push_back(d);
-    last_cdf = result.cdf;
-  }
-  cutoffs_.push_back(std::numeric_limits<size_t>::max());
-  expected_.push_back(std::max(0.0, 1.0 - last_cdf));
-}
-
-template <typename D>
-double PoissonDistributionChiSquaredTest::ChiSquaredTestImpl() {
-  const int kSamples = 2000;
-  const int kBuckets = 50;
-
-  // The poisson CDF fails for large mean values, since e^-mean exceeds the
-  // machine precision. For these cases, using a normal approximation would be
-  // appropriate.
-  ABSL_ASSERT(mean() <= 200);
-  InitChiSquaredTest(kBuckets);
-
-  D dis(mean());
-
-  std::vector<int32_t> counts(cutoffs_.size(), 0);
-  for (int j = 0; j < kSamples; j++) {
-    const size_t x = dis(rng_);
-    auto it = std::lower_bound(std::begin(cutoffs_), std::end(cutoffs_), x);
-    counts[std::distance(cutoffs_.begin(), it)]++;
-  }
-
-  // Normalize the counts.
-  std::vector<int32_t> e(expected_.size(), 0);
-  for (int i = 0; i < e.size(); i++) {
-    e[i] = kSamples * expected_[i];
-  }
-
-  // The null-hypothesis is that the distribution is a poisson distribution with
-  // the provided mean (not estimated from the data).
-  const int dof = static_cast<int>(counts.size()) - 1;
-
-  // The threshold for logging is 1-in-50.
-  const double threshold = absl::random_internal::ChiSquareValue(dof, 0.98);
-
-  const double chi_square = absl::random_internal::ChiSquare(
-      std::begin(counts), std::end(counts), std::begin(e), std::end(e));
-
-  const double p = absl::random_internal::ChiSquarePValue(chi_square, dof);
-
-  // Log if the chi_squared value is above the threshold.
-  if (chi_square > threshold) {
-    LogCDF();
-
-    ABSL_INTERNAL_LOG(INFO, absl::StrCat("VALUES  buckets=", counts.size(),
-                                         "  samples=", kSamples));
-    for (size_t i = 0; i < counts.size(); i++) {
-      ABSL_INTERNAL_LOG(
-          INFO, absl::StrCat(cutoffs_[i], ": ", counts[i], " vs. E=", e[i]));
-    }
-
-    ABSL_INTERNAL_LOG(
-        INFO,
-        absl::StrCat(kChiSquared, "(data, dof=", dof, ") = ", chi_square, " (",
-                     p, ")\n", " vs.\n", kChiSquared, " @ 0.98 = ", threshold));
-  }
-  return p;
-}
-
-TEST_P(PoissonDistributionChiSquaredTest, AbslPoissonDistribution) {
-  const int kTrials = 20;
-
-  // Large values are not yet supported -- this requires estimating the cdf
-  // using the normal distribution instead of the poisson in this case.
-  ASSERT_LE(mean(), 200.0);
-  if (mean() > 200.0) {
-    return;
-  }
-
-  int failures = 0;
-  for (int i = 0; i < kTrials; i++) {
-    double p_value = ChiSquaredTestImpl<absl::poisson_distribution<int32_t>>();
-    if (p_value < 0.005) {
-      failures++;
-    }
-  }
-  // There is a 0.10% chance of producing at least one failure, so raise the
-  // failure threshold high enough to allow for a flake rate < 10,000.
-  EXPECT_LE(failures, 4);
-}
-
-INSTANTIATE_TEST_SUITE_P(All, PoissonDistributionChiSquaredTest,
-                         ::testing::Values(0.5, 1.0, 2.0, 10.0, 50.0, 51.0,
-                                           200.0));
-
-// NOTE: absl::poisson_distribution is not guaranteed to be stable.
-TEST(PoissonDistributionTest, StabilityTest) {
-  using testing::ElementsAre;
-  // absl::poisson_distribution stability relies on stability of
-  // std::exp, std::log, std::sqrt, std::ceil, std::floor, and
-  // absl::FastUniformBits, absl::StirlingLogFactorial, absl::RandU64ToDouble.
-  absl::random_internal::sequence_urbg urbg({
-      0x035b0dc7e0a18acfull, 0x06cebe0d2653682eull, 0x0061e9b23861596bull,
-      0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-      0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-      0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-      0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull,
-      0x4864f22c059bf29eull, 0x247856d8b862665cull, 0xe46e86e9a1337e10ull,
-      0xd8c8541f3519b133ull, 0xe75b5162c567b9e4ull, 0xf732e5ded7009c5bull,
-      0xb170b98353121eacull, 0x1ec2e8986d2362caull, 0x814c8e35fe9a961aull,
-      0x0c3cd59c9b638a02ull, 0xcb3bb6478a07715cull, 0x1224e62c978bbc7full,
-      0x671ef2cb04e81f6eull, 0x3c1cbd811eaf1808ull, 0x1bbc23cfa8fac721ull,
-      0xa4c2cda65e596a51ull, 0xb77216fad37adf91ull, 0x836d794457c08849ull,
-      0xe083df03475f49d7ull, 0xbc9feb512e6b0d6cull, 0xb12d74fdd718c8c5ull,
-      0x12ff09653bfbe4caull, 0x8dd03a105bc4ee7eull, 0x5738341045ba0d85ull,
-      0xf3fd722dc65ad09eull, 0xfa14fd21ea2a5705ull, 0xffe6ea4d6edb0c73ull,
-      0xD07E9EFE2BF11FB4ull, 0x95DBDA4DAE909198ull, 0xEAAD8E716B93D5A0ull,
-      0xD08ED1D0AFC725E0ull, 0x8E3C5B2F8E7594B7ull, 0x8FF6E2FBF2122B64ull,
-      0x8888B812900DF01Cull, 0x4FAD5EA0688FC31Cull, 0xD1CFF191B3A8C1ADull,
-      0x2F2F2218BE0E1777ull, 0xEA752DFE8B021FA1ull, 0xE5A0CC0FB56F74E8ull,
-      0x18ACF3D6CE89E299ull, 0xB4A84FE0FD13E0B7ull, 0x7CC43B81D2ADA8D9ull,
-      0x165FA26680957705ull, 0x93CC7314211A1477ull, 0xE6AD206577B5FA86ull,
-      0xC75442F5FB9D35CFull, 0xEBCDAF0C7B3E89A0ull, 0xD6411BD3AE1E7E49ull,
-      0x00250E2D2071B35Eull, 0x226800BB57B8E0AFull, 0x2464369BF009B91Eull,
-      0x5563911D59DFA6AAull, 0x78C14389D95A537Full, 0x207D5BA202E5B9C5ull,
-      0x832603766295CFA9ull, 0x11C819684E734A41ull, 0xB3472DCA7B14A94Aull,
-  });
-
-  std::vector<int> output(10);
-
-  // Method 1.
-  {
-    absl::poisson_distribution<int> dist(5);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-  }
-  EXPECT_THAT(output,  // mean = 4.2
-              ElementsAre(1, 0, 0, 4, 2, 10, 3, 3, 7, 12));
-
-  // Method 2.
-  {
-    urbg.reset();
-    absl::poisson_distribution<int> dist(25);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-  }
-  EXPECT_THAT(output,  // mean = 19.8
-              ElementsAre(9, 35, 18, 10, 35, 18, 10, 35, 18, 10));
-
-  // Method 3.
-  {
-    urbg.reset();
-    absl::poisson_distribution<int> dist(121);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-  }
-  EXPECT_THAT(output,  // mean = 124.1
-              ElementsAre(161, 122, 129, 124, 112, 112, 117, 120, 130, 114));
-}
-
-TEST(PoissonDistributionTest, AlgorithmExpectedValue_1) {
-  // This tests small values of the Knuth method.
-  // The underlying uniform distribution will generate exactly 0.5.
-  absl::random_internal::sequence_urbg urbg({0x8000000000000001ull});
-  absl::poisson_distribution<int> dist(5);
-  EXPECT_EQ(7, dist(urbg));
-}
-
-TEST(PoissonDistributionTest, AlgorithmExpectedValue_2) {
-  // This tests larger values of the Knuth method.
-  // The underlying uniform distribution will generate exactly 0.5.
-  absl::random_internal::sequence_urbg urbg({0x8000000000000001ull});
-  absl::poisson_distribution<int> dist(25);
-  EXPECT_EQ(36, dist(urbg));
-}
-
-TEST(PoissonDistributionTest, AlgorithmExpectedValue_3) {
-  // This variant uses the ratio of uniforms method.
-  absl::random_internal::sequence_urbg urbg(
-      {0x7fffffffffffffffull, 0x8000000000000000ull});
-
-  absl::poisson_distribution<int> dist(121);
-  EXPECT_EQ(121, dist(urbg));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/random.h b/third_party/abseil/absl/random/random.h
deleted file mode 100644
index 71b6309..0000000
--- a/third_party/abseil/absl/random/random.h
+++ /dev/null
@@ -1,189 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: random.h
-// -----------------------------------------------------------------------------
-//
-// This header defines the recommended Uniform Random Bit Generator (URBG)
-// types for use within the Abseil Random library. These types are not
-// suitable for security-related use-cases, but should suffice for most other
-// uses of generating random values.
-//
-// The Abseil random library provides the following URBG types:
-//
-//   * BitGen, a good general-purpose bit generator, optimized for generating
-//     random (but not cryptographically secure) values
-//   * InsecureBitGen, a slightly faster, though less random, bit generator, for
-//     cases where the existing BitGen is a drag on performance.
-
-#ifndef ABSL_RANDOM_RANDOM_H_
-#define ABSL_RANDOM_RANDOM_H_
-
-#include <random>
-
-#include "absl/random/distributions.h"  // IWYU pragma: export
-#include "absl/random/internal/nonsecure_base.h"  // IWYU pragma: export
-#include "absl/random/internal/pcg_engine.h"  // IWYU pragma: export
-#include "absl/random/internal/pool_urbg.h"
-#include "absl/random/internal/randen_engine.h"
-#include "absl/random/seed_sequences.h"  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// absl::BitGen
-// -----------------------------------------------------------------------------
-//
-// `absl::BitGen` is a general-purpose random bit generator for generating
-// random values for use within the Abseil random library. Typically, you use a
-// bit generator in combination with a distribution to provide random values.
-//
-// Example:
-//
-//   // Create an absl::BitGen. There is no need to seed this bit generator.
-//   absl::BitGen gen;
-//
-//   // Generate an integer value in the closed interval [1,6]
-//   int die_roll = absl::uniform_int_distribution<int>(1, 6)(gen);
-//
-// `absl::BitGen` is seeded by default with non-deterministic data to produce
-// different sequences of random values across different instances, including
-// different binary invocations. This behavior is different than the standard
-// library bit generators, which use golden values as their seeds. Default
-// construction intentionally provides no stability guarantees, to avoid
-// accidental dependence on such a property.
-//
-// `absl::BitGen` may be constructed with an optional seed sequence type,
-// conforming to [rand.req.seed_seq], which will be mixed with additional
-// non-deterministic data.
-//
-// Example:
-//
-//  // Create an absl::BitGen using an std::seed_seq seed sequence
-//  std::seed_seq seq{1,2,3};
-//  absl::BitGen gen_with_seed(seq);
-//
-//  // Generate an integer value in the closed interval [1,6]
-//  int die_roll2 = absl::uniform_int_distribution<int>(1, 6)(gen_with_seed);
-//
-// `absl::BitGen` meets the requirements of the Uniform Random Bit Generator
-// (URBG) concept as per the C++17 standard [rand.req.urng] though differs
-// slightly with [rand.req.eng]. Like its standard library equivalents (e.g.
-// `std::mersenne_twister_engine`) `absl::BitGen` is not cryptographically
-// secure.
-//
-// Constructing two `absl::BitGen`s with the same seed sequence in the same
-// binary will produce the same sequence of variates within the same binary, but
-// need not do so across multiple binary invocations.
-//
-// This type has been optimized to perform better than Mersenne Twister
-// (https://en.wikipedia.org/wiki/Mersenne_Twister) and many other complex URBG
-// types on modern x86, ARM, and PPC architectures.
-//
-// This type is thread-compatible, but not thread-safe.
-
-// ---------------------------------------------------------------------------
-// absl::BitGen member functions
-// ---------------------------------------------------------------------------
-
-// absl::BitGen::operator()()
-//
-// Calls the BitGen, returning a generated value.
-
-// absl::BitGen::min()
-//
-// Returns the smallest possible value from this bit generator.
-
-// absl::BitGen::max()
-//
-// Returns the largest possible value from this bit generator.
-
-// absl::BitGen::discard(num)
-//
-// Advances the internal state of this bit generator by `num` times, and
-// discards the intermediate results.
-// ---------------------------------------------------------------------------
-
-using BitGen = random_internal::NonsecureURBGBase<
-    random_internal::randen_engine<uint64_t>>;
-
-// -----------------------------------------------------------------------------
-// absl::InsecureBitGen
-// -----------------------------------------------------------------------------
-//
-// `absl::InsecureBitGen` is an efficient random bit generator for generating
-// random values, recommended only for performance-sensitive use cases where
-// `absl::BitGen` is not satisfactory when compute-bounded by bit generation
-// costs.
-//
-// Example:
-//
-//   // Create an absl::InsecureBitGen
-//   absl::InsecureBitGen gen;
-//   for (size_t i = 0; i < 1000000; i++) {
-//
-//     // Generate a bunch of random values from some complex distribution
-//     auto my_rnd = some_distribution(gen, 1, 1000);
-//   }
-//
-// Like `absl::BitGen`, `absl::InsecureBitGen` is seeded by default with
-// non-deterministic data to produce different sequences of random values across
-// different instances, including different binary invocations. (This behavior
-// is different than the standard library bit generators, which use golden
-// values as their seeds.)
-//
-// `absl::InsecureBitGen` may be constructed with an optional seed sequence
-// type, conforming to [rand.req.seed_seq], which will be mixed with additional
-// non-deterministic data. (See std_seed_seq.h for more information.)
-//
-// `absl::InsecureBitGen` meets the requirements of the Uniform Random Bit
-// Generator (URBG) concept as per the C++17 standard [rand.req.urng] though
-// its implementation differs slightly with [rand.req.eng]. Like its standard
-// library equivalents (e.g. `std::mersenne_twister_engine`)
-// `absl::InsecureBitGen` is not cryptographically secure.
-//
-// Prefer `absl::BitGen` over `absl::InsecureBitGen` as the general type is
-// often fast enough for the vast majority of applications.
-
-using InsecureBitGen =
-    random_internal::NonsecureURBGBase<random_internal::pcg64_2018_engine>;
-
-// ---------------------------------------------------------------------------
-// absl::InsecureBitGen member functions
-// ---------------------------------------------------------------------------
-
-// absl::InsecureBitGen::operator()()
-//
-// Calls the InsecureBitGen, returning a generated value.
-
-// absl::InsecureBitGen::min()
-//
-// Returns the smallest possible value from this bit generator.
-
-// absl::InsecureBitGen::max()
-//
-// Returns the largest possible value from this bit generator.
-
-// absl::InsecureBitGen::discard(num)
-//
-// Advances the internal state of this bit generator by `num` times, and
-// discards the intermediate results.
-// ---------------------------------------------------------------------------
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_RANDOM_H_
diff --git a/third_party/abseil/absl/random/seed_gen_exception.cc b/third_party/abseil/absl/random/seed_gen_exception.cc
deleted file mode 100644
index fdcb54a..0000000
--- a/third_party/abseil/absl/random/seed_gen_exception.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/seed_gen_exception.h"
-
-#include <iostream>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-static constexpr const char kExceptionMessage[] =
-    "Failed generating seed-material for URBG.";
-
-SeedGenException::~SeedGenException() = default;
-
-const char* SeedGenException::what() const noexcept {
-  return kExceptionMessage;
-}
-
-namespace random_internal {
-
-void ThrowSeedGenException() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  throw absl::SeedGenException();
-#else
-  std::cerr << kExceptionMessage << std::endl;
-  std::terminate();
-#endif
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/seed_gen_exception.h b/third_party/abseil/absl/random/seed_gen_exception.h
deleted file mode 100644
index 5353900..0000000
--- a/third_party/abseil/absl/random/seed_gen_exception.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: seed_gen_exception.h
-// -----------------------------------------------------------------------------
-//
-// This header defines an exception class which may be thrown if unpredictable
-// events prevent the derivation of suitable seed-material for constructing a
-// bit generator conforming to [rand.req.urng] (eg. entropy cannot be read from
-// /dev/urandom on a Unix-based system).
-//
-// Note: if exceptions are disabled, `std::terminate()` is called instead.
-
-#ifndef ABSL_RANDOM_SEED_GEN_EXCEPTION_H_
-#define ABSL_RANDOM_SEED_GEN_EXCEPTION_H_
-
-#include <exception>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-//------------------------------------------------------------------------------
-// SeedGenException
-//------------------------------------------------------------------------------
-class SeedGenException : public std::exception {
- public:
-  SeedGenException() = default;
-  ~SeedGenException() override;
-  const char* what() const noexcept override;
-};
-
-namespace random_internal {
-
-// throw delegator
-[[noreturn]] void ThrowSeedGenException();
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_SEED_GEN_EXCEPTION_H_
diff --git a/third_party/abseil/absl/random/seed_sequences.cc b/third_party/abseil/absl/random/seed_sequences.cc
deleted file mode 100644
index 426eafd..0000000
--- a/third_party/abseil/absl/random/seed_sequences.cc
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/seed_sequences.h"
-
-#include "absl/random/internal/pool_urbg.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-SeedSeq MakeSeedSeq() {
-  SeedSeq::result_type seed_material[8];
-  random_internal::RandenPool<uint32_t>::Fill(absl::MakeSpan(seed_material));
-  return SeedSeq(std::begin(seed_material), std::end(seed_material));
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/random/seed_sequences.h b/third_party/abseil/absl/random/seed_sequences.h
deleted file mode 100644
index ff1340c..0000000
--- a/third_party/abseil/absl/random/seed_sequences.h
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: seed_sequences.h
-// -----------------------------------------------------------------------------
-//
-// This header contains utilities for creating and working with seed sequences
-// conforming to [rand.req.seedseq]. In general, direct construction of seed
-// sequences is discouraged, but use-cases for construction of identical bit
-// generators (using the same seed sequence) may be helpful (e.g. replaying a
-// simulation whose state is derived from variates of a bit generator).
-
-#ifndef ABSL_RANDOM_SEED_SEQUENCES_H_
-#define ABSL_RANDOM_SEED_SEQUENCES_H_
-
-#include <iterator>
-#include <random>
-
-#include "absl/random/internal/salted_seed_seq.h"
-#include "absl/random/internal/seed_material.h"
-#include "absl/random/seed_gen_exception.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// absl::SeedSeq
-// -----------------------------------------------------------------------------
-//
-// `absl::SeedSeq` constructs a seed sequence according to [rand.req.seedseq]
-// for use within bit generators. `absl::SeedSeq`, unlike `std::seed_seq`
-// additionally salts the generated seeds with extra implementation-defined
-// entropy. For that reason, you can use `absl::SeedSeq` in combination with
-// standard library bit generators (e.g. `std::mt19937`) to introduce
-// non-determinism in your seeds.
-//
-// Example:
-//
-//   absl::SeedSeq my_seed_seq({a, b, c});
-//   std::mt19937 my_bitgen(my_seed_seq);
-//
-using SeedSeq = random_internal::SaltedSeedSeq<std::seed_seq>;
-
-// -----------------------------------------------------------------------------
-// absl::CreateSeedSeqFrom(bitgen*)
-// -----------------------------------------------------------------------------
-//
-// Constructs a seed sequence conforming to [rand.req.seedseq] using variates
-// produced by a provided bit generator.
-//
-// You should generally avoid direct construction of seed sequences, but
-// use-cases for reuse of a seed sequence to construct identical bit generators
-// may be helpful (eg. replaying a simulation whose state is derived from bit
-// generator values).
-//
-// If bitgen == nullptr, then behavior is undefined.
-//
-// Example:
-//
-//   absl::BitGen my_bitgen;
-//   auto seed_seq = absl::CreateSeedSeqFrom(&my_bitgen);
-//   absl::BitGen new_engine(seed_seq); // derived from my_bitgen, but not
-//                                      // correlated.
-//
-template <typename URBG>
-SeedSeq CreateSeedSeqFrom(URBG* urbg) {
-  SeedSeq::result_type
-      seed_material[random_internal::kEntropyBlocksNeeded];
-
-  if (!random_internal::ReadSeedMaterialFromURBG(
-          urbg, absl::MakeSpan(seed_material))) {
-    random_internal::ThrowSeedGenException();
-  }
-  return SeedSeq(std::begin(seed_material), std::end(seed_material));
-}
-
-// -----------------------------------------------------------------------------
-// absl::MakeSeedSeq()
-// -----------------------------------------------------------------------------
-//
-// Constructs an `absl::SeedSeq` salting the generated values using
-// implementation-defined entropy. The returned sequence can be used to create
-// equivalent bit generators correlated using this sequence.
-//
-// Example:
-//
-//   auto my_seed_seq = absl::MakeSeedSeq();
-//   std::mt19937 rng1(my_seed_seq);
-//   std::mt19937 rng2(my_seed_seq);
-//   EXPECT_EQ(rng1(), rng2());
-//
-SeedSeq MakeSeedSeq();
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_SEED_SEQUENCES_H_
diff --git a/third_party/abseil/absl/random/seed_sequences_test.cc b/third_party/abseil/absl/random/seed_sequences_test.cc
deleted file mode 100644
index fe1100b..0000000
--- a/third_party/abseil/absl/random/seed_sequences_test.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/seed_sequences.h"
-
-#include <iterator>
-#include <random>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/random/internal/nonsecure_base.h"
-#include "absl/random/random.h"
-namespace {
-
-TEST(SeedSequences, Examples) {
-  {
-    absl::SeedSeq seed_seq({1, 2, 3});
-    absl::BitGen bitgen(seed_seq);
-
-    EXPECT_NE(0, bitgen());
-  }
-  {
-    absl::BitGen engine;
-    auto seed_seq = absl::CreateSeedSeqFrom(&engine);
-    absl::BitGen bitgen(seed_seq);
-
-    EXPECT_NE(engine(), bitgen());
-  }
-  {
-    auto seed_seq = absl::MakeSeedSeq();
-    std::mt19937 random(seed_seq);
-
-    EXPECT_NE(0, random());
-  }
-}
-
-TEST(CreateSeedSeqFrom, CompatibleWithStdTypes) {
-  using ExampleNonsecureURBG =
-      absl::random_internal::NonsecureURBGBase<std::minstd_rand0>;
-
-  // Construct a URBG instance.
-  ExampleNonsecureURBG rng;
-
-  // Construct a Seed Sequence from its variates.
-  auto seq_from_rng = absl::CreateSeedSeqFrom(&rng);
-
-  // Ensure that another URBG can be validly constructed from the Seed Sequence.
-  std::mt19937_64{seq_from_rng};
-}
-
-TEST(CreateSeedSeqFrom, CompatibleWithBitGenerator) {
-  // Construct a URBG instance.
-  absl::BitGen rng;
-
-  // Construct a Seed Sequence from its variates.
-  auto seq_from_rng = absl::CreateSeedSeqFrom(&rng);
-
-  // Ensure that another URBG can be validly constructed from the Seed Sequence.
-  std::mt19937_64{seq_from_rng};
-}
-
-TEST(CreateSeedSeqFrom, CompatibleWithInsecureBitGen) {
-  // Construct a URBG instance.
-  absl::InsecureBitGen rng;
-
-  // Construct a Seed Sequence from its variates.
-  auto seq_from_rng = absl::CreateSeedSeqFrom(&rng);
-
-  // Ensure that another URBG can be validly constructed from the Seed Sequence.
-  std::mt19937_64{seq_from_rng};
-}
-
-TEST(CreateSeedSeqFrom, CompatibleWithRawURBG) {
-  // Construct a URBG instance.
-  std::random_device urandom;
-
-  // Construct a Seed Sequence from its variates, using 64b of seed-material.
-  auto seq_from_rng = absl::CreateSeedSeqFrom(&urandom);
-
-  // Ensure that another URBG can be validly constructed from the Seed Sequence.
-  std::mt19937_64{seq_from_rng};
-}
-
-template <typename URBG>
-void TestReproducibleVariateSequencesForNonsecureURBG() {
-  const size_t kNumVariates = 1000;
-
-  URBG rng;
-  // Reused for both RNG instances.
-  auto reusable_seed = absl::CreateSeedSeqFrom(&rng);
-
-  typename URBG::result_type variates[kNumVariates];
-  {
-    URBG child(reusable_seed);
-    for (auto& variate : variates) {
-      variate = child();
-    }
-  }
-  // Ensure that variate-sequence can be "replayed" by identical RNG.
-  {
-    URBG child(reusable_seed);
-    for (auto& variate : variates) {
-      ASSERT_EQ(variate, child());
-    }
-  }
-}
-
-TEST(CreateSeedSeqFrom, ReproducesVariateSequencesForInsecureBitGen) {
-  TestReproducibleVariateSequencesForNonsecureURBG<absl::InsecureBitGen>();
-}
-
-TEST(CreateSeedSeqFrom, ReproducesVariateSequencesForBitGenerator) {
-  TestReproducibleVariateSequencesForNonsecureURBG<absl::BitGen>();
-}
-}  // namespace
diff --git a/third_party/abseil/absl/random/uniform_int_distribution.h b/third_party/abseil/absl/random/uniform_int_distribution.h
deleted file mode 100644
index c1f54cc..0000000
--- a/third_party/abseil/absl/random/uniform_int_distribution.h
+++ /dev/null
@@ -1,275 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: uniform_int_distribution.h
-// -----------------------------------------------------------------------------
-//
-// This header defines a class for representing a uniform integer distribution
-// over the closed (inclusive) interval [a,b]. You use this distribution in
-// combination with an Abseil random bit generator to produce random values
-// according to the rules of the distribution.
-//
-// `absl::uniform_int_distribution` is a drop-in replacement for the C++11
-// `std::uniform_int_distribution` [rand.dist.uni.int] but is considerably
-// faster than the libstdc++ implementation.
-
-#ifndef ABSL_RANDOM_UNIFORM_INT_DISTRIBUTION_H_
-#define ABSL_RANDOM_UNIFORM_INT_DISTRIBUTION_H_
-
-#include <cassert>
-#include <istream>
-#include <limits>
-#include <type_traits>
-
-#include "absl/base/optimization.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/iostream_state_saver.h"
-#include "absl/random/internal/traits.h"
-#include "absl/random/internal/wide_multiply.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::uniform_int_distribution<T>
-//
-// This distribution produces random integer values uniformly distributed in the
-// closed (inclusive) interval [a, b].
-//
-// Example:
-//
-//   absl::BitGen gen;
-//
-//   // Use the distribution to produce a value between 1 and 6, inclusive.
-//   int die_roll = absl::uniform_int_distribution<int>(1, 6)(gen);
-//
-template <typename IntType = int>
-class uniform_int_distribution {
- private:
-  using unsigned_type =
-      typename random_internal::make_unsigned_bits<IntType>::type;
-
- public:
-  using result_type = IntType;
-
-  class param_type {
-   public:
-    using distribution_type = uniform_int_distribution;
-
-    explicit param_type(
-        result_type lo = 0,
-        result_type hi = (std::numeric_limits<result_type>::max)())
-        : lo_(lo),
-          range_(static_cast<unsigned_type>(hi) -
-                 static_cast<unsigned_type>(lo)) {
-      // [rand.dist.uni.int] precondition 2
-      assert(lo <= hi);
-    }
-
-    result_type a() const { return lo_; }
-    result_type b() const {
-      return static_cast<result_type>(static_cast<unsigned_type>(lo_) + range_);
-    }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.lo_ == b.lo_ && a.range_ == b.range_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class uniform_int_distribution;
-    unsigned_type range() const { return range_; }
-
-    result_type lo_;
-    unsigned_type range_;
-
-    static_assert(std::is_integral<result_type>::value,
-                  "Class-template absl::uniform_int_distribution<> must be "
-                  "parameterized using an integral type.");
-  };  // param_type
-
-  uniform_int_distribution() : uniform_int_distribution(0) {}
-
-  explicit uniform_int_distribution(
-      result_type lo,
-      result_type hi = (std::numeric_limits<result_type>::max)())
-      : param_(lo, hi) {}
-
-  explicit uniform_int_distribution(const param_type& param) : param_(param) {}
-
-  // uniform_int_distribution<T>::reset()
-  //
-  // Resets the uniform int distribution. Note that this function has no effect
-  // because the distribution already produces independent values.
-  void reset() {}
-
-  template <typename URBG>
-  result_type operator()(URBG& gen) {  // NOLINT(runtime/references)
-    return (*this)(gen, param());
-  }
-
-  template <typename URBG>
-  result_type operator()(
-      URBG& gen, const param_type& param) {  // NOLINT(runtime/references)
-    return param.a() + Generate(gen, param.range());
-  }
-
-  result_type a() const { return param_.a(); }
-  result_type b() const { return param_.b(); }
-
-  param_type param() const { return param_; }
-  void param(const param_type& params) { param_ = params; }
-
-  result_type(min)() const { return a(); }
-  result_type(max)() const { return b(); }
-
-  friend bool operator==(const uniform_int_distribution& a,
-                         const uniform_int_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const uniform_int_distribution& a,
-                         const uniform_int_distribution& b) {
-    return !(a == b);
-  }
-
- private:
-  // Generates a value in the *closed* interval [0, R]
-  template <typename URBG>
-  unsigned_type Generate(URBG& g,  // NOLINT(runtime/references)
-                         unsigned_type R);
-  param_type param_;
-};
-
-// -----------------------------------------------------------------------------
-// Implementation details follow
-// -----------------------------------------------------------------------------
-template <typename CharT, typename Traits, typename IntType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,
-    const uniform_int_distribution<IntType>& x) {
-  using stream_type =
-      typename random_internal::stream_format_type<IntType>::type;
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os << static_cast<stream_type>(x.a()) << os.fill()
-     << static_cast<stream_type>(x.b());
-  return os;
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,
-    uniform_int_distribution<IntType>& x) {
-  using param_type = typename uniform_int_distribution<IntType>::param_type;
-  using result_type = typename uniform_int_distribution<IntType>::result_type;
-  using stream_type =
-      typename random_internal::stream_format_type<IntType>::type;
-
-  stream_type a;
-  stream_type b;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  is >> a >> b;
-  if (!is.fail()) {
-    x.param(
-        param_type(static_cast<result_type>(a), static_cast<result_type>(b)));
-  }
-  return is;
-}
-
-template <typename IntType>
-template <typename URBG>
-typename random_internal::make_unsigned_bits<IntType>::type
-uniform_int_distribution<IntType>::Generate(
-    URBG& g,  // NOLINT(runtime/references)
-    typename random_internal::make_unsigned_bits<IntType>::type R) {
-  random_internal::FastUniformBits<unsigned_type> fast_bits;
-  unsigned_type bits = fast_bits(g);
-  const unsigned_type Lim = R + 1;
-  if ((R & Lim) == 0) {
-    // If the interval's length is a power of two range, just take the low bits.
-    return bits & R;
-  }
-
-  // Generates a uniform variate on [0, Lim) using fixed-point multiplication.
-  // The above fast-path guarantees that Lim is representable in unsigned_type.
-  //
-  // Algorithm adapted from
-  // http://lemire.me/blog/2016/06/30/fast-random-shuffling/, with added
-  // explanation.
-  //
-  // The algorithm creates a uniform variate `bits` in the interval [0, 2^N),
-  // and treats it as the fractional part of a fixed-point real value in [0, 1),
-  // multiplied by 2^N.  For example, 0.25 would be represented as 2^(N - 2),
-  // because 2^N * 0.25 == 2^(N - 2).
-  //
-  // Next, `bits` and `Lim` are multiplied with a wide-multiply to bring the
-  // value into the range [0, Lim).  The integral part (the high word of the
-  // multiplication result) is then very nearly the desired result.  However,
-  // this is not quite accurate; viewing the multiplication result as one
-  // double-width integer, the resulting values for the sample are mapped as
-  // follows:
-  //
-  // If the result lies in this interval:       Return this value:
-  //        [0, 2^N)                                    0
-  //        [2^N, 2 * 2^N)                              1
-  //        ...                                         ...
-  //        [K * 2^N, (K + 1) * 2^N)                    K
-  //        ...                                         ...
-  //        [(Lim - 1) * 2^N, Lim * 2^N)                Lim - 1
-  //
-  // While all of these intervals have the same size, the result of `bits * Lim`
-  // must be a multiple of `Lim`, and not all of these intervals contain the
-  // same number of multiples of `Lim`.  In particular, some contain
-  // `F = floor(2^N / Lim)` and some contain `F + 1 = ceil(2^N / Lim)`.  This
-  // difference produces a small nonuniformity, which is corrected by applying
-  // rejection sampling to one of the values in the "larger intervals" (i.e.,
-  // the intervals containing `F + 1` multiples of `Lim`.
-  //
-  // An interval contains `F + 1` multiples of `Lim` if and only if its smallest
-  // value modulo 2^N is less than `2^N % Lim`.  The unique value satisfying
-  // this property is used as the one for rejection.  That is, a value of
-  // `bits * Lim` is rejected if `(bit * Lim) % 2^N < (2^N % Lim)`.
-
-  using helper = random_internal::wide_multiply<unsigned_type>;
-  auto product = helper::multiply(bits, Lim);
-
-  // Two optimizations here:
-  // * Rejection occurs with some probability less than 1/2, and for reasonable
-  //   ranges considerably less (in particular, less than 1/(F+1)), so
-  //   ABSL_PREDICT_FALSE is apt.
-  // * `Lim` is an overestimate of `threshold`, and doesn't require a divide.
-  if (ABSL_PREDICT_FALSE(helper::lo(product) < Lim)) {
-    // This quantity is exactly equal to `2^N % Lim`, but does not require high
-    // precision calculations: `2^N % Lim` is congruent to `(2^N - Lim) % Lim`.
-    // Ideally this could be expressed simply as `-X` rather than `2^N - X`, but
-    // for types smaller than int, this calculation is incorrect due to integer
-    // promotion rules.
-    const unsigned_type threshold =
-        ((std::numeric_limits<unsigned_type>::max)() - Lim + 1) % Lim;
-    while (helper::lo(product) < threshold) {
-      bits = fast_bits(g);
-      product = helper::multiply(bits, Lim);
-    }
-  }
-
-  return helper::hi(product);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_UNIFORM_INT_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/uniform_int_distribution_test.cc b/third_party/abseil/absl/random/uniform_int_distribution_test.cc
deleted file mode 100644
index 276d72a..0000000
--- a/third_party/abseil/absl/random/uniform_int_distribution_test.cc
+++ /dev/null
@@ -1,259 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/uniform_int_distribution.h"
-
-#include <cmath>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <sstream>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-template <typename IntType>
-class UniformIntDistributionTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<int8_t, uint8_t, int16_t, uint16_t, int32_t,
-                                  uint32_t, int64_t, uint64_t>;
-TYPED_TEST_SUITE(UniformIntDistributionTest, IntTypes);
-
-TYPED_TEST(UniformIntDistributionTest, ParamSerializeTest) {
-  // This test essentially ensures that the parameters serialize,
-  // not that the values generated cover the full range.
-  using Limits = std::numeric_limits<TypeParam>;
-  using param_type =
-      typename absl::uniform_int_distribution<TypeParam>::param_type;
-  const TypeParam kMin = std::is_unsigned<TypeParam>::value ? 37 : -105;
-  const TypeParam kNegOneOrZero = std::is_unsigned<TypeParam>::value ? 0 : -1;
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  for (const auto& param : {
-           param_type(),
-           param_type(2, 2),  // Same
-           param_type(9, 32),
-           param_type(kMin, 115),
-           param_type(kNegOneOrZero, Limits::max()),
-           param_type(Limits::min(), Limits::max()),
-           param_type(Limits::lowest(), Limits::max()),
-           param_type(Limits::min() + 1, Limits::max() - 1),
-       }) {
-    const auto a = param.a();
-    const auto b = param.b();
-    absl::uniform_int_distribution<TypeParam> before(a, b);
-    EXPECT_EQ(before.a(), param.a());
-    EXPECT_EQ(before.b(), param.b());
-
-    {
-      // Initialize via param_type
-      absl::uniform_int_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-    }
-
-    // Initialize via iostreams
-    std::stringstream ss;
-    ss << before;
-
-    absl::uniform_int_distribution<TypeParam> after(Limits::min() + 3,
-                                                    Limits::max() - 5);
-
-    EXPECT_NE(before.a(), after.a());
-    EXPECT_NE(before.b(), after.b());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-    EXPECT_EQ(before.a(), after.a());
-    EXPECT_EQ(before.b(), after.b());
-    EXPECT_EQ(before.param(), after.param());
-    EXPECT_EQ(before, after);
-
-    // Smoke test.
-    auto sample_min = after.max();
-    auto sample_max = after.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = after(gen);
-      EXPECT_GE(sample, after.min());
-      EXPECT_LE(sample, after.max());
-      if (sample > sample_max) {
-        sample_max = sample;
-      }
-      if (sample < sample_min) {
-        sample_min = sample;
-      }
-    }
-    std::string msg = absl::StrCat("Range: ", +sample_min, ", ", +sample_max);
-    ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-  }
-}
-
-TYPED_TEST(UniformIntDistributionTest, ViolatesPreconditionsDeathTest) {
-#if GTEST_HAS_DEATH_TEST
-  // Hi < Lo
-  EXPECT_DEBUG_DEATH({ absl::uniform_int_distribution<TypeParam> dist(10, 1); },
-                     "");
-#endif  // GTEST_HAS_DEATH_TEST
-#if defined(NDEBUG)
-  // opt-mode, for invalid parameters, will generate a garbage value,
-  // but should not enter an infinite loop.
-  absl::InsecureBitGen gen;
-  absl::uniform_int_distribution<TypeParam> dist(10, 1);
-  auto x = dist(gen);
-
-  // Any value will generate a non-empty string.
-  EXPECT_FALSE(absl::StrCat(+x).empty()) << x;
-#endif  // NDEBUG
-}
-
-TYPED_TEST(UniformIntDistributionTest, TestMoments) {
-  constexpr int kSize = 100000;
-  using Limits = std::numeric_limits<TypeParam>;
-  using param_type =
-      typename absl::uniform_int_distribution<TypeParam>::param_type;
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6};
-
-  std::vector<double> values(kSize);
-  for (const auto& param :
-       {param_type(0, Limits::max()), param_type(13, 127)}) {
-    absl::uniform_int_distribution<TypeParam> dist(param);
-    for (int i = 0; i < kSize; i++) {
-      const auto sample = dist(rng);
-      ASSERT_LE(dist.param().a(), sample);
-      ASSERT_GE(dist.param().b(), sample);
-      values[i] = sample;
-    }
-
-    auto moments = absl::random_internal::ComputeDistributionMoments(values);
-    const double a = dist.param().a();
-    const double b = dist.param().b();
-    const double n = (b - a + 1);
-    const double mean = (a + b) / 2;
-    const double var = ((b - a + 1) * (b - a + 1) - 1) / 12;
-    const double kurtosis = 3 - 6 * (n * n + 1) / (5 * (n * n - 1));
-
-    // TODO(ahh): this is not the right bound
-    // empirically validated with --runs_per_test=10000.
-    EXPECT_NEAR(mean, moments.mean, 0.01 * var);
-    EXPECT_NEAR(var, moments.variance, 0.015 * var);
-    EXPECT_NEAR(0.0, moments.skewness, 0.025);
-    EXPECT_NEAR(kurtosis, moments.kurtosis, 0.02 * kurtosis);
-  }
-}
-
-TYPED_TEST(UniformIntDistributionTest, ChiSquaredTest50) {
-  using absl::random_internal::kChiSquared;
-
-  constexpr size_t kTrials = 1000;
-  constexpr int kBuckets = 50;  // inclusive, so actally +1
-  constexpr double kExpected =
-      static_cast<double>(kTrials) / static_cast<double>(kBuckets);
-
-  // Empirically validated with --runs_per_test=10000.
-  const int kThreshold =
-      absl::random_internal::ChiSquareValue(kBuckets, 0.999999);
-
-  const TypeParam min = std::is_unsigned<TypeParam>::value ? 37 : -37;
-  const TypeParam max = min + kBuckets;
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6};
-
-  absl::uniform_int_distribution<TypeParam> dist(min, max);
-
-  std::vector<int32_t> counts(kBuckets + 1, 0);
-  for (size_t i = 0; i < kTrials; i++) {
-    auto x = dist(rng);
-    counts[x - min]++;
-  }
-  double chi_square = absl::random_internal::ChiSquareWithExpected(
-      std::begin(counts), std::end(counts), kExpected);
-  if (chi_square > kThreshold) {
-    double p_value =
-        absl::random_internal::ChiSquarePValue(chi_square, kBuckets);
-
-    // Chi-squared test failed. Output does not appear to be uniform.
-    std::string msg;
-    for (const auto& a : counts) {
-      absl::StrAppend(&msg, a, "\n");
-    }
-    absl::StrAppend(&msg, kChiSquared, " p-value ", p_value, "\n");
-    absl::StrAppend(&msg, "High ", kChiSquared, " value: ", chi_square, " > ",
-                    kThreshold);
-    ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-    FAIL() << msg;
-  }
-}
-
-TEST(UniformIntDistributionTest, StabilityTest) {
-  // absl::uniform_int_distribution stability relies only on integer operations.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(12);
-
-  {
-    absl::uniform_int_distribution<int32_t> dist(0, 4);
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-  }
-  EXPECT_EQ(12, urbg.invocations());
-  EXPECT_THAT(output, testing::ElementsAre(4, 4, 3, 2, 1, 0, 1, 4, 3, 1, 3, 1));
-
-  {
-    urbg.reset();
-    absl::uniform_int_distribution<int32_t> dist(0, 100);
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-  }
-  EXPECT_EQ(12, urbg.invocations());
-  EXPECT_THAT(output, testing::ElementsAre(97, 86, 75, 41, 36, 16, 38, 92, 67,
-                                           30, 80, 38));
-
-  {
-    urbg.reset();
-    absl::uniform_int_distribution<int32_t> dist(0, 10000);
-    for (auto& v : output) {
-      v = dist(urbg);
-    }
-  }
-  EXPECT_EQ(12, urbg.invocations());
-  EXPECT_THAT(output, testing::ElementsAre(9648, 8562, 7439, 4089, 3571, 1602,
-                                           3813, 9195, 6641, 2986, 7956, 3765));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/uniform_real_distribution.h b/third_party/abseil/absl/random/uniform_real_distribution.h
deleted file mode 100644
index 5ba17b2..0000000
--- a/third_party/abseil/absl/random/uniform_real_distribution.h
+++ /dev/null
@@ -1,202 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: uniform_real_distribution.h
-// -----------------------------------------------------------------------------
-//
-// This header defines a class for representing a uniform floating-point
-// distribution over a half-open interval [a,b). You use this distribution in
-// combination with an Abseil random bit generator to produce random values
-// according to the rules of the distribution.
-//
-// `absl::uniform_real_distribution` is a drop-in replacement for the C++11
-// `std::uniform_real_distribution` [rand.dist.uni.real] but is considerably
-// faster than the libstdc++ implementation.
-//
-// Note: the standard-library version may occasionally return `1.0` when
-// default-initialized. See https://bugs.llvm.org//show_bug.cgi?id=18767
-// `absl::uniform_real_distribution` does not exhibit this behavior.
-
-#ifndef ABSL_RANDOM_UNIFORM_REAL_DISTRIBUTION_H_
-#define ABSL_RANDOM_UNIFORM_REAL_DISTRIBUTION_H_
-
-#include <cassert>
-#include <cmath>
-#include <cstdint>
-#include <istream>
-#include <limits>
-#include <type_traits>
-
-#include "absl/meta/type_traits.h"
-#include "absl/random/internal/fast_uniform_bits.h"
-#include "absl/random/internal/generate_real.h"
-#include "absl/random/internal/iostream_state_saver.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::uniform_real_distribution<T>
-//
-// This distribution produces random floating-point values uniformly distributed
-// over the half-open interval [a, b).
-//
-// Example:
-//
-//   absl::BitGen gen;
-//
-//   // Use the distribution to produce a value between 0.0 (inclusive)
-//   // and 1.0 (exclusive).
-//   double value = absl::uniform_real_distribution<double>(0, 1)(gen);
-//
-template <typename RealType = double>
-class uniform_real_distribution {
- public:
-  using result_type = RealType;
-
-  class param_type {
-   public:
-    using distribution_type = uniform_real_distribution;
-
-    explicit param_type(result_type lo = 0, result_type hi = 1)
-        : lo_(lo), hi_(hi), range_(hi - lo) {
-      // [rand.dist.uni.real] preconditions 2 & 3
-      assert(lo <= hi);
-      // NOTE: For integral types, we can promote the range to an unsigned type,
-      // which gives full width of the range. However for real (fp) types, this
-      // is not possible, so value generation cannot use the full range of the
-      // real type.
-      assert(range_ <= (std::numeric_limits<result_type>::max)());
-      assert(std::isfinite(range_));
-    }
-
-    result_type a() const { return lo_; }
-    result_type b() const { return hi_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.lo_ == b.lo_ && a.hi_ == b.hi_;
-    }
-
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class uniform_real_distribution;
-    result_type lo_, hi_, range_;
-
-    static_assert(std::is_floating_point<RealType>::value,
-                  "Class-template absl::uniform_real_distribution<> must be "
-                  "parameterized using a floating-point type.");
-  };
-
-  uniform_real_distribution() : uniform_real_distribution(0) {}
-
-  explicit uniform_real_distribution(result_type lo, result_type hi = 1)
-      : param_(lo, hi) {}
-
-  explicit uniform_real_distribution(const param_type& param) : param_(param) {}
-
-  // uniform_real_distribution<T>::reset()
-  //
-  // Resets the uniform real distribution. Note that this function has no effect
-  // because the distribution already produces independent values.
-  void reset() {}
-
-  template <typename URBG>
-  result_type operator()(URBG& gen) {  // NOLINT(runtime/references)
-    return operator()(gen, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& gen,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  result_type a() const { return param_.a(); }
-  result_type b() const { return param_.b(); }
-
-  param_type param() const { return param_; }
-  void param(const param_type& params) { param_ = params; }
-
-  result_type(min)() const { return a(); }
-  result_type(max)() const { return b(); }
-
-  friend bool operator==(const uniform_real_distribution& a,
-                         const uniform_real_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const uniform_real_distribution& a,
-                         const uniform_real_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  param_type param_;
-  random_internal::FastUniformBits<uint64_t> fast_u64_;
-};
-
-// -----------------------------------------------------------------------------
-// Implementation details follow
-// -----------------------------------------------------------------------------
-template <typename RealType>
-template <typename URBG>
-typename uniform_real_distribution<RealType>::result_type
-uniform_real_distribution<RealType>::operator()(
-    URBG& gen, const param_type& p) {  // NOLINT(runtime/references)
-  using random_internal::GeneratePositiveTag;
-  using random_internal::GenerateRealFromBits;
-  using real_type =
-      absl::conditional_t<std::is_same<RealType, float>::value, float, double>;
-
-  while (true) {
-    const result_type sample =
-        GenerateRealFromBits<real_type, GeneratePositiveTag, true>(
-            fast_u64_(gen));
-    const result_type res = p.a() + (sample * p.range_);
-    if (res < p.b() || p.range_ <= 0 || !std::isfinite(p.range_)) {
-      return res;
-    }
-    // else sample rejected, try again.
-  }
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const uniform_real_distribution<RealType>& x) {
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<RealType>::kPrecision);
-  os << x.a() << os.fill() << x.b();
-  return os;
-}
-
-template <typename CharT, typename Traits, typename RealType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,     // NOLINT(runtime/references)
-    uniform_real_distribution<RealType>& x) {  // NOLINT(runtime/references)
-  using param_type = typename uniform_real_distribution<RealType>::param_type;
-  using result_type = typename uniform_real_distribution<RealType>::result_type;
-  auto saver = random_internal::make_istream_state_saver(is);
-  auto a = random_internal::read_floating_point<result_type>(is);
-  if (is.fail()) return is;
-  auto b = random_internal::read_floating_point<result_type>(is);
-  if (!is.fail()) {
-    x.param(param_type(a, b));
-  }
-  return is;
-}
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_UNIFORM_REAL_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/uniform_real_distribution_test.cc b/third_party/abseil/absl/random/uniform_real_distribution_test.cc
deleted file mode 100644
index 8cf874d..0000000
--- a/third_party/abseil/absl/random/uniform_real_distribution_test.cc
+++ /dev/null
@@ -1,339 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/uniform_real_distribution.h"
-
-#include <cmath>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/distribution_test_util.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-
-// NOTES:
-// * Some documentation on generating random real values suggests that
-//   it is possible to use std::nextafter(b, DBL_MAX) to generate a value on
-//   the closed range [a, b]. Unfortunately, that technique is not universally
-//   reliable due to floating point quantization.
-//
-// * absl::uniform_real_distribution<float> generates between 2^28 and 2^29
-//   distinct floating point values in the range [0, 1).
-//
-// * absl::uniform_real_distribution<float> generates at least 2^23 distinct
-//   floating point values in the range [1, 2). This should be the same as
-//   any other range covered by a single exponent in IEEE 754.
-//
-// * absl::uniform_real_distribution<double> generates more than 2^52 distinct
-//   values in the range [0, 1), and should generate at least 2^52 distinct
-//   values in the range of [1, 2).
-//
-
-namespace {
-
-template <typename RealType>
-class UniformRealDistributionTest : public ::testing::Test {};
-
-using RealTypes = ::testing::Types<float, double, long double>;
-
-TYPED_TEST_SUITE(UniformRealDistributionTest, RealTypes);
-
-TYPED_TEST(UniformRealDistributionTest, ParamSerializeTest) {
-  using param_type =
-      typename absl::uniform_real_distribution<TypeParam>::param_type;
-
-  constexpr const TypeParam a{1152921504606846976};
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  for (const auto& param : {
-           param_type(),
-           param_type(TypeParam(2.0), TypeParam(2.0)),  // Same
-           param_type(TypeParam(-0.1), TypeParam(0.1)),
-           param_type(TypeParam(0.05), TypeParam(0.12)),
-           param_type(TypeParam(-0.05), TypeParam(0.13)),
-           param_type(TypeParam(-0.05), TypeParam(-0.02)),
-           // double range = 0
-           // 2^60 , 2^60 + 2^6
-           param_type(a, TypeParam(1152921504606847040)),
-           // 2^60 , 2^60 + 2^7
-           param_type(a, TypeParam(1152921504606847104)),
-           // double range = 2^8
-           // 2^60 , 2^60 + 2^8
-           param_type(a, TypeParam(1152921504606847232)),
-           // float range = 0
-           // 2^60 , 2^60 + 2^36
-           param_type(a, TypeParam(1152921573326323712)),
-           // 2^60 , 2^60 + 2^37
-           param_type(a, TypeParam(1152921642045800448)),
-           // float range = 2^38
-           // 2^60 , 2^60 + 2^38
-           param_type(a, TypeParam(1152921779484753920)),
-           // Limits
-           param_type(0, std::numeric_limits<TypeParam>::max()),
-           param_type(std::numeric_limits<TypeParam>::lowest(), 0),
-           param_type(0, std::numeric_limits<TypeParam>::epsilon()),
-           param_type(-std::numeric_limits<TypeParam>::epsilon(),
-                      std::numeric_limits<TypeParam>::epsilon()),
-           param_type(std::numeric_limits<TypeParam>::epsilon(),
-                      2 * std::numeric_limits<TypeParam>::epsilon()),
-       }) {
-    // Validate parameters.
-    const auto a = param.a();
-    const auto b = param.b();
-    absl::uniform_real_distribution<TypeParam> before(a, b);
-    EXPECT_EQ(before.a(), param.a());
-    EXPECT_EQ(before.b(), param.b());
-
-    {
-      absl::uniform_real_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-    }
-
-    std::stringstream ss;
-    ss << before;
-    absl::uniform_real_distribution<TypeParam> after(TypeParam(1.0),
-                                                     TypeParam(3.1));
-
-    EXPECT_NE(before.a(), after.a());
-    EXPECT_NE(before.b(), after.b());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-    EXPECT_EQ(before.a(), after.a());
-    EXPECT_EQ(before.b(), after.b());
-    EXPECT_EQ(before.param(), after.param());
-    EXPECT_EQ(before, after);
-
-    // Smoke test.
-    auto sample_min = after.max();
-    auto sample_max = after.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = after(gen);
-      // Failure here indicates a bug in uniform_real_distribution::operator(),
-      // or bad parameters--range too large, etc.
-      if (after.min() == after.max()) {
-        EXPECT_EQ(sample, after.min());
-      } else {
-        EXPECT_GE(sample, after.min());
-        EXPECT_LT(sample, after.max());
-      }
-      if (sample > sample_max) {
-        sample_max = sample;
-      }
-      if (sample < sample_min) {
-        sample_min = sample;
-      }
-    }
-
-    if (!std::is_same<TypeParam, long double>::value) {
-      // static_cast<double>(long double) can overflow.
-      std::string msg = absl::StrCat("Range: ", static_cast<double>(sample_min),
-                                     ", ", static_cast<double>(sample_max));
-      ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-    }
-  }
-}
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable:4756)  // Constant arithmetic overflow.
-#endif
-TYPED_TEST(UniformRealDistributionTest, ViolatesPreconditionsDeathTest) {
-#if GTEST_HAS_DEATH_TEST
-  // Hi < Lo
-  EXPECT_DEBUG_DEATH(
-      { absl::uniform_real_distribution<TypeParam> dist(10.0, 1.0); }, "");
-
-  // Hi - Lo > numeric_limits<>::max()
-  EXPECT_DEBUG_DEATH(
-      {
-        absl::uniform_real_distribution<TypeParam> dist(
-            std::numeric_limits<TypeParam>::lowest(),
-            std::numeric_limits<TypeParam>::max());
-      },
-      "");
-#endif  // GTEST_HAS_DEATH_TEST
-#if defined(NDEBUG)
-  // opt-mode, for invalid parameters, will generate a garbage value,
-  // but should not enter an infinite loop.
-  absl::InsecureBitGen gen;
-  {
-    absl::uniform_real_distribution<TypeParam> dist(10.0, 1.0);
-    auto x = dist(gen);
-    EXPECT_FALSE(std::isnan(x)) << x;
-  }
-  {
-    absl::uniform_real_distribution<TypeParam> dist(
-        std::numeric_limits<TypeParam>::lowest(),
-        std::numeric_limits<TypeParam>::max());
-    auto x = dist(gen);
-    // Infinite result.
-    EXPECT_FALSE(std::isfinite(x)) << x;
-  }
-#endif  // NDEBUG
-}
-#ifdef _MSC_VER
-#pragma warning(pop)  // warning(disable:4756)
-#endif
-
-TYPED_TEST(UniformRealDistributionTest, TestMoments) {
-  constexpr int kSize = 1000000;
-  std::vector<double> values(kSize);
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6};
-
-  absl::uniform_real_distribution<TypeParam> dist;
-  for (int i = 0; i < kSize; i++) {
-    values[i] = dist(rng);
-  }
-
-  const auto moments =
-      absl::random_internal::ComputeDistributionMoments(values);
-  EXPECT_NEAR(0.5, moments.mean, 0.01);
-  EXPECT_NEAR(1 / 12.0, moments.variance, 0.015);
-  EXPECT_NEAR(0.0, moments.skewness, 0.02);
-  EXPECT_NEAR(9 / 5.0, moments.kurtosis, 0.015);
-}
-
-TYPED_TEST(UniformRealDistributionTest, ChiSquaredTest50) {
-  using absl::random_internal::kChiSquared;
-  using param_type =
-      typename absl::uniform_real_distribution<TypeParam>::param_type;
-
-  constexpr size_t kTrials = 100000;
-  constexpr int kBuckets = 50;
-  constexpr double kExpected =
-      static_cast<double>(kTrials) / static_cast<double>(kBuckets);
-
-  // 1-in-100000 threshold, but remember, there are about 8 tests
-  // in this file. And the test could fail for other reasons.
-  // Empirically validated with --runs_per_test=10000.
-  const int kThreshold =
-      absl::random_internal::ChiSquareValue(kBuckets - 1, 0.999999);
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng{0x2B7E151628AED2A6};
-
-  for (const auto& param : {param_type(0, 1), param_type(5, 12),
-                            param_type(-5, 13), param_type(-5, -2)}) {
-    const double min_val = param.a();
-    const double max_val = param.b();
-    const double factor = kBuckets / (max_val - min_val);
-
-    std::vector<int32_t> counts(kBuckets, 0);
-    absl::uniform_real_distribution<TypeParam> dist(param);
-    for (size_t i = 0; i < kTrials; i++) {
-      auto x = dist(rng);
-      auto bucket = static_cast<size_t>((x - min_val) * factor);
-      counts[bucket]++;
-    }
-
-    double chi_square = absl::random_internal::ChiSquareWithExpected(
-        std::begin(counts), std::end(counts), kExpected);
-    if (chi_square > kThreshold) {
-      double p_value =
-          absl::random_internal::ChiSquarePValue(chi_square, kBuckets);
-
-      // Chi-squared test failed. Output does not appear to be uniform.
-      std::string msg;
-      for (const auto& a : counts) {
-        absl::StrAppend(&msg, a, "\n");
-      }
-      absl::StrAppend(&msg, kChiSquared, " p-value ", p_value, "\n");
-      absl::StrAppend(&msg, "High ", kChiSquared, " value: ", chi_square, " > ",
-                      kThreshold);
-      ABSL_RAW_LOG(INFO, "%s", msg.c_str());
-      FAIL() << msg;
-    }
-  }
-}
-
-TYPED_TEST(UniformRealDistributionTest, StabilityTest) {
-  // absl::uniform_real_distribution stability relies only on
-  // random_internal::RandU64ToDouble and random_internal::RandU64ToFloat.
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(12);
-
-  absl::uniform_real_distribution<TypeParam> dist;
-  std::generate(std::begin(output), std::end(output), [&] {
-    return static_cast<int>(TypeParam(1000000) * dist(urbg));
-  });
-
-  EXPECT_THAT(
-      output,  //
-      testing::ElementsAre(59, 999246, 762494, 395876, 167716, 82545, 925251,
-                           77341, 12527, 708791, 834451, 932808));
-}
-
-TEST(UniformRealDistributionTest, AlgorithmBounds) {
-  absl::uniform_real_distribution<double> dist;
-
-  {
-    // This returns the smallest value >0 from absl::uniform_real_distribution.
-    absl::random_internal::sequence_urbg urbg({0x0000000000000001ull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 5.42101086242752217004e-20);
-  }
-
-  {
-    // This returns a value very near 0.5 from absl::uniform_real_distribution.
-    absl::random_internal::sequence_urbg urbg({0x7fffffffffffffefull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 0.499999999999999944489);
-  }
-  {
-    // This returns a value very near 0.5 from absl::uniform_real_distribution.
-    absl::random_internal::sequence_urbg urbg({0x8000000000000000ull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 0.5);
-  }
-
-  {
-    // This returns the largest value <1 from absl::uniform_real_distribution.
-    absl::random_internal::sequence_urbg urbg({0xFFFFFFFFFFFFFFEFull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 0.999999999999999888978);
-  }
-  {
-    // This *ALSO* returns the largest value <1.
-    absl::random_internal::sequence_urbg urbg({0xFFFFFFFFFFFFFFFFull});
-    double a = dist(urbg);
-    EXPECT_EQ(a, 0.999999999999999888978);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/random/zipf_distribution.h b/third_party/abseil/absl/random/zipf_distribution.h
deleted file mode 100644
index 22ebc75..0000000
--- a/third_party/abseil/absl/random/zipf_distribution.h
+++ /dev/null
@@ -1,271 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_ZIPF_DISTRIBUTION_H_
-#define ABSL_RANDOM_ZIPF_DISTRIBUTION_H_
-
-#include <cassert>
-#include <cmath>
-#include <istream>
-#include <limits>
-#include <ostream>
-#include <type_traits>
-
-#include "absl/random/internal/iostream_state_saver.h"
-#include "absl/random/uniform_real_distribution.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::zipf_distribution produces random integer-values in the range [0, k],
-// distributed according to the discrete probability function:
-//
-//  P(x) = (v + x) ^ -q
-//
-// The parameter `v` must be greater than 0 and the parameter `q` must be
-// greater than 1. If either of these parameters take invalid values then the
-// behavior is undefined.
-//
-// IntType is the result_type generated by the generator. It must be of integral
-// type; a static_assert ensures this is the case.
-//
-// The implementation is based on W.Hormann, G.Derflinger:
-//
-// "Rejection-Inversion to Generate Variates from Monotone Discrete
-// Distributions"
-//
-// http://eeyore.wu-wien.ac.at/papers/96-04-04.wh-der.ps.gz
-//
-template <typename IntType = int>
-class zipf_distribution {
- public:
-  using result_type = IntType;
-
-  class param_type {
-   public:
-    using distribution_type = zipf_distribution;
-
-    // Preconditions: k > 0, v > 0, q > 1
-    // The precondidtions are validated when NDEBUG is not defined via
-    // a pair of assert() directives.
-    // If NDEBUG is defined and either or both of these parameters take invalid
-    // values, the behavior of the class is undefined.
-    explicit param_type(result_type k = (std::numeric_limits<IntType>::max)(),
-                        double q = 2.0, double v = 1.0);
-
-    result_type k() const { return k_; }
-    double q() const { return q_; }
-    double v() const { return v_; }
-
-    friend bool operator==(const param_type& a, const param_type& b) {
-      return a.k_ == b.k_ && a.q_ == b.q_ && a.v_ == b.v_;
-    }
-    friend bool operator!=(const param_type& a, const param_type& b) {
-      return !(a == b);
-    }
-
-   private:
-    friend class zipf_distribution;
-    inline double h(double x) const;
-    inline double hinv(double x) const;
-    inline double compute_s() const;
-    inline double pow_negative_q(double x) const;
-
-    // Parameters here are exactly the same as the parameters of Algorithm ZRI
-    // in the paper.
-    IntType k_;
-    double q_;
-    double v_;
-
-    double one_minus_q_;  // 1-q
-    double s_;
-    double one_minus_q_inv_;  // 1 / 1-q
-    double hxm_;              // h(k + 0.5)
-    double hx0_minus_hxm_;    // h(x0) - h(k + 0.5)
-
-    static_assert(std::is_integral<IntType>::value,
-                  "Class-template absl::zipf_distribution<> must be "
-                  "parameterized using an integral type.");
-  };
-
-  zipf_distribution()
-      : zipf_distribution((std::numeric_limits<IntType>::max)()) {}
-
-  explicit zipf_distribution(result_type k, double q = 2.0, double v = 1.0)
-      : param_(k, q, v) {}
-
-  explicit zipf_distribution(const param_type& p) : param_(p) {}
-
-  void reset() {}
-
-  template <typename URBG>
-  result_type operator()(URBG& g) {  // NOLINT(runtime/references)
-    return (*this)(g, param_);
-  }
-
-  template <typename URBG>
-  result_type operator()(URBG& g,  // NOLINT(runtime/references)
-                         const param_type& p);
-
-  result_type k() const { return param_.k(); }
-  double q() const { return param_.q(); }
-  double v() const { return param_.v(); }
-
-  param_type param() const { return param_; }
-  void param(const param_type& p) { param_ = p; }
-
-  result_type(min)() const { return 0; }
-  result_type(max)() const { return k(); }
-
-  friend bool operator==(const zipf_distribution& a,
-                         const zipf_distribution& b) {
-    return a.param_ == b.param_;
-  }
-  friend bool operator!=(const zipf_distribution& a,
-                         const zipf_distribution& b) {
-    return a.param_ != b.param_;
-  }
-
- private:
-  param_type param_;
-};
-
-// --------------------------------------------------------------------------
-// Implementation details follow
-// --------------------------------------------------------------------------
-
-template <typename IntType>
-zipf_distribution<IntType>::param_type::param_type(
-    typename zipf_distribution<IntType>::result_type k, double q, double v)
-    : k_(k), q_(q), v_(v), one_minus_q_(1 - q) {
-  assert(q > 1);
-  assert(v > 0);
-  assert(k > 0);
-  one_minus_q_inv_ = 1 / one_minus_q_;
-
-  // Setup for the ZRI algorithm (pg 17 of the paper).
-  // Compute: h(i max) => h(k + 0.5)
-  constexpr double kMax = 18446744073709549568.0;
-  double kd = static_cast<double>(k);
-  // TODO(absl-team): Determine if this check is needed, and if so, add a test
-  // that fails for k > kMax
-  if (kd > kMax) {
-    // Ensure that our maximum value is capped to a value which will
-    // round-trip back through double.
-    kd = kMax;
-  }
-  hxm_ = h(kd + 0.5);
-
-  // Compute: h(0)
-  const bool use_precomputed = (v == 1.0 && q == 2.0);
-  const double h0x5 = use_precomputed ? (-1.0 / 1.5)  // exp(-log(1.5))
-                                      : h(0.5);
-  const double elogv_q = (v_ == 1.0) ? 1 : pow_negative_q(v_);
-
-  // h(0) = h(0.5) - exp(log(v) * -q)
-  hx0_minus_hxm_ = (h0x5 - elogv_q) - hxm_;
-
-  // And s
-  s_ = use_precomputed ? 0.46153846153846123 : compute_s();
-}
-
-template <typename IntType>
-double zipf_distribution<IntType>::param_type::h(double x) const {
-  // std::exp(one_minus_q_ * std::log(v_ + x)) * one_minus_q_inv_;
-  x += v_;
-  return (one_minus_q_ == -1.0)
-             ? (-1.0 / x)  // -exp(-log(x))
-             : (std::exp(std::log(x) * one_minus_q_) * one_minus_q_inv_);
-}
-
-template <typename IntType>
-double zipf_distribution<IntType>::param_type::hinv(double x) const {
-  // std::exp(one_minus_q_inv_ * std::log(one_minus_q_ * x)) - v_;
-  return -v_ + ((one_minus_q_ == -1.0)
-                    ? (-1.0 / x)  // exp(-log(-x))
-                    : std::exp(one_minus_q_inv_ * std::log(one_minus_q_ * x)));
-}
-
-template <typename IntType>
-double zipf_distribution<IntType>::param_type::compute_s() const {
-  // 1 - hinv(h(1.5) - std::exp(std::log(v_ + 1) * -q_));
-  return 1.0 - hinv(h(1.5) - pow_negative_q(v_ + 1.0));
-}
-
-template <typename IntType>
-double zipf_distribution<IntType>::param_type::pow_negative_q(double x) const {
-  // std::exp(std::log(x) * -q_);
-  return q_ == 2.0 ? (1.0 / (x * x)) : std::exp(std::log(x) * -q_);
-}
-
-template <typename IntType>
-template <typename URBG>
-typename zipf_distribution<IntType>::result_type
-zipf_distribution<IntType>::operator()(
-    URBG& g, const param_type& p) {  // NOLINT(runtime/references)
-  absl::uniform_real_distribution<double> uniform_double;
-  double k;
-  for (;;) {
-    const double v = uniform_double(g);
-    const double u = p.hxm_ + v * p.hx0_minus_hxm_;
-    const double x = p.hinv(u);
-    k = rint(x);              // std::floor(x + 0.5);
-    if (k > p.k()) continue;  // reject k > max_k
-    if (k - x <= p.s_) break;
-    const double h = p.h(k + 0.5);
-    const double r = p.pow_negative_q(p.v_ + k);
-    if (u >= h - r) break;
-  }
-  IntType ki = static_cast<IntType>(k);
-  assert(ki <= p.k_);
-  return ki;
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_ostream<CharT, Traits>& operator<<(
-    std::basic_ostream<CharT, Traits>& os,  // NOLINT(runtime/references)
-    const zipf_distribution<IntType>& x) {
-  using stream_type =
-      typename random_internal::stream_format_type<IntType>::type;
-  auto saver = random_internal::make_ostream_state_saver(os);
-  os.precision(random_internal::stream_precision_helper<double>::kPrecision);
-  os << static_cast<stream_type>(x.k()) << os.fill() << x.q() << os.fill()
-     << x.v();
-  return os;
-}
-
-template <typename CharT, typename Traits, typename IntType>
-std::basic_istream<CharT, Traits>& operator>>(
-    std::basic_istream<CharT, Traits>& is,  // NOLINT(runtime/references)
-    zipf_distribution<IntType>& x) {        // NOLINT(runtime/references)
-  using result_type = typename zipf_distribution<IntType>::result_type;
-  using param_type = typename zipf_distribution<IntType>::param_type;
-  using stream_type =
-      typename random_internal::stream_format_type<IntType>::type;
-  stream_type k;
-  double q;
-  double v;
-
-  auto saver = random_internal::make_istream_state_saver(is);
-  is >> k >> q >> v;
-  if (!is.fail()) {
-    x.param(param_type(static_cast<result_type>(k), q, v));
-  }
-  return is;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_ZIPF_DISTRIBUTION_H_
diff --git a/third_party/abseil/absl/random/zipf_distribution_test.cc b/third_party/abseil/absl/random/zipf_distribution_test.cc
deleted file mode 100644
index f8cf70e..0000000
--- a/third_party/abseil/absl/random/zipf_distribution_test.cc
+++ /dev/null
@@ -1,427 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/random/zipf_distribution.h"
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <iterator>
-#include <random>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/internal/chi_square.h"
-#include "absl/random/internal/pcg_engine.h"
-#include "absl/random/internal/sequence_urbg.h"
-#include "absl/random/random.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_replace.h"
-#include "absl/strings/strip.h"
-
-namespace {
-
-using ::absl::random_internal::kChiSquared;
-using ::testing::ElementsAre;
-
-template <typename IntType>
-class ZipfDistributionTypedTest : public ::testing::Test {};
-
-using IntTypes = ::testing::Types<int, int8_t, int16_t, int32_t, int64_t,
-                                  uint8_t, uint16_t, uint32_t, uint64_t>;
-TYPED_TEST_CASE(ZipfDistributionTypedTest, IntTypes);
-
-TYPED_TEST(ZipfDistributionTypedTest, SerializeTest) {
-  using param_type = typename absl::zipf_distribution<TypeParam>::param_type;
-
-  constexpr int kCount = 1000;
-  absl::InsecureBitGen gen;
-  for (const auto& param : {
-           param_type(),
-           param_type(32),
-           param_type(100, 3, 2),
-           param_type(std::numeric_limits<TypeParam>::max(), 4, 3),
-           param_type(std::numeric_limits<TypeParam>::max() / 2),
-       }) {
-    // Validate parameters.
-    const auto k = param.k();
-    const auto q = param.q();
-    const auto v = param.v();
-
-    absl::zipf_distribution<TypeParam> before(k, q, v);
-    EXPECT_EQ(before.k(), param.k());
-    EXPECT_EQ(before.q(), param.q());
-    EXPECT_EQ(before.v(), param.v());
-
-    {
-      absl::zipf_distribution<TypeParam> via_param(param);
-      EXPECT_EQ(via_param, before);
-    }
-
-    // Validate stream serialization.
-    std::stringstream ss;
-    ss << before;
-    absl::zipf_distribution<TypeParam> after(4, 5.5, 4.4);
-
-    EXPECT_NE(before.k(), after.k());
-    EXPECT_NE(before.q(), after.q());
-    EXPECT_NE(before.v(), after.v());
-    EXPECT_NE(before.param(), after.param());
-    EXPECT_NE(before, after);
-
-    ss >> after;
-
-    EXPECT_EQ(before.k(), after.k());
-    EXPECT_EQ(before.q(), after.q());
-    EXPECT_EQ(before.v(), after.v());
-    EXPECT_EQ(before.param(), after.param());
-    EXPECT_EQ(before, after);
-
-    // Smoke test.
-    auto sample_min = after.max();
-    auto sample_max = after.min();
-    for (int i = 0; i < kCount; i++) {
-      auto sample = after(gen);
-      EXPECT_GE(sample, after.min());
-      EXPECT_LE(sample, after.max());
-      if (sample > sample_max) sample_max = sample;
-      if (sample < sample_min) sample_min = sample;
-    }
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrCat("Range: ", +sample_min, ", ", +sample_max));
-  }
-}
-
-class ZipfModel {
- public:
-  ZipfModel(size_t k, double q, double v) : k_(k), q_(q), v_(v) {}
-
-  double mean() const { return mean_; }
-
-  // For the other moments of the Zipf distribution, see, for example,
-  // http://mathworld.wolfram.com/ZipfDistribution.html
-
-  // PMF(k) = (1 / k^s) / H(N,s)
-  // Returns the probability that any single invocation returns k.
-  double PMF(size_t i) { return i >= hnq_.size() ? 0.0 : hnq_[i] / sum_hnq_; }
-
-  // CDF = H(k, s) / H(N,s)
-  double CDF(size_t i) {
-    if (i >= hnq_.size()) {
-      return 1.0;
-    }
-    auto it = std::begin(hnq_);
-    double h = 0.0;
-    for (const auto end = it; it != end; it++) {
-      h += *it;
-    }
-    return h / sum_hnq_;
-  }
-
-  // The InverseCDF returns the k values which bound p on the upper and lower
-  // bound. Since there is no closed-form solution, this is implemented as a
-  // bisction of the cdf.
-  std::pair<size_t, size_t> InverseCDF(double p) {
-    size_t min = 0;
-    size_t max = hnq_.size();
-    while (max > min + 1) {
-      size_t target = (max + min) >> 1;
-      double x = CDF(target);
-      if (x > p) {
-        max = target;
-      } else {
-        min = target;
-      }
-    }
-    return {min, max};
-  }
-
-  // Compute the probability totals, which are based on the generalized harmonic
-  // number, H(N,s).
-  //   H(N,s) == SUM(k=1..N, 1 / k^s)
-  //
-  // In the limit, H(N,s) == zetac(s) + 1.
-  //
-  // NOTE: The mean of a zipf distribution could be computed here as well.
-  // Mean :=  H(N, s-1) / H(N,s).
-  // Given the parameter v = 1, this gives the following function:
-  // (Hn(100, 1) - Hn(1,1)) / (Hn(100,2) - Hn(1,2)) = 6.5944
-  //
-  void Init() {
-    if (!hnq_.empty()) {
-      return;
-    }
-    hnq_.clear();
-    hnq_.reserve(std::min(k_, size_t{1000}));
-
-    sum_hnq_ = 0;
-    double qm1 = q_ - 1.0;
-    double sum_hnq_m1 = 0;
-    for (size_t i = 0; i < k_; i++) {
-      // Partial n-th generalized harmonic number
-      const double x = v_ + i;
-
-      // H(n, q-1)
-      const double hnqm1 =
-          (q_ == 2.0) ? (1.0 / x)
-                      : (q_ == 3.0) ? (1.0 / (x * x)) : std::pow(x, -qm1);
-      sum_hnq_m1 += hnqm1;
-
-      // H(n, q)
-      const double hnq =
-          (q_ == 2.0) ? (1.0 / (x * x))
-                      : (q_ == 3.0) ? (1.0 / (x * x * x)) : std::pow(x, -q_);
-      sum_hnq_ += hnq;
-      hnq_.push_back(hnq);
-      if (i > 1000 && hnq <= 1e-10) {
-        // The harmonic number is too small.
-        break;
-      }
-    }
-    assert(sum_hnq_ > 0);
-    mean_ = sum_hnq_m1 / sum_hnq_;
-  }
-
- private:
-  const size_t k_;
-  const double q_;
-  const double v_;
-
-  double mean_;
-  std::vector<double> hnq_;
-  double sum_hnq_;
-};
-
-using zipf_u64 = absl::zipf_distribution<uint64_t>;
-
-class ZipfTest : public testing::TestWithParam<zipf_u64::param_type>,
-                 public ZipfModel {
- public:
-  ZipfTest() : ZipfModel(GetParam().k(), GetParam().q(), GetParam().v()) {}
-
-  // We use a fixed bit generator for distribution accuracy tests.  This allows
-  // these tests to be deterministic, while still testing the qualify of the
-  // implementation.
-  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
-};
-
-TEST_P(ZipfTest, ChiSquaredTest) {
-  const auto& param = GetParam();
-  Init();
-
-  size_t trials = 10000;
-
-  // Find the split-points for the buckets.
-  std::vector<size_t> points;
-  std::vector<double> expected;
-  {
-    double last_cdf = 0.0;
-    double min_p = 1.0;
-    for (double p = 0.01; p < 1.0; p += 0.01) {
-      auto x = InverseCDF(p);
-      if (points.empty() || points.back() < x.second) {
-        const double p = CDF(x.second);
-        points.push_back(x.second);
-        double q = p - last_cdf;
-        expected.push_back(q);
-        last_cdf = p;
-        if (q < min_p) {
-          min_p = q;
-        }
-      }
-    }
-    if (last_cdf < 0.999) {
-      points.push_back(std::numeric_limits<size_t>::max());
-      double q = 1.0 - last_cdf;
-      expected.push_back(q);
-      if (q < min_p) {
-        min_p = q;
-      }
-    } else {
-      points.back() = std::numeric_limits<size_t>::max();
-      expected.back() += (1.0 - last_cdf);
-    }
-    // The Chi-Squared score is not completely scale-invariant; it works best
-    // when the small values are in the small digits.
-    trials = static_cast<size_t>(8.0 / min_p);
-  }
-  ASSERT_GT(points.size(), 0);
-
-  // Generate n variates and fill the counts vector with the count of their
-  // occurrences.
-  std::vector<int64_t> buckets(points.size(), 0);
-  double avg = 0;
-  {
-    zipf_u64 dis(param);
-    for (size_t i = 0; i < trials; i++) {
-      uint64_t x = dis(rng_);
-      ASSERT_LE(x, dis.max());
-      ASSERT_GE(x, dis.min());
-      avg += static_cast<double>(x);
-      auto it = std::upper_bound(std::begin(points), std::end(points),
-                                 static_cast<size_t>(x));
-      buckets[std::distance(std::begin(points), it)]++;
-    }
-    avg = avg / static_cast<double>(trials);
-  }
-
-  // Validate the output using the Chi-Squared test.
-  for (auto& e : expected) {
-    e *= trials;
-  }
-
-  // The null-hypothesis is that the distribution is a poisson distribution with
-  // the provided mean (not estimated from the data).
-  const int dof = static_cast<int>(expected.size()) - 1;
-
-  // NOTE: This test runs about 15x per invocation, so a value of 0.9995 is
-  // approximately correct for a test suite failure rate of 1 in 100.  In
-  // practice we see failures slightly higher than that.
-  const double threshold = absl::random_internal::ChiSquareValue(dof, 0.9999);
-
-  const double chi_square = absl::random_internal::ChiSquare(
-      std::begin(buckets), std::end(buckets), std::begin(expected),
-      std::end(expected));
-
-  const double p_actual =
-      absl::random_internal::ChiSquarePValue(chi_square, dof);
-
-  // Log if the chi_squared value is above the threshold.
-  if (chi_square > threshold) {
-    ABSL_INTERNAL_LOG(INFO, "values");
-    for (size_t i = 0; i < expected.size(); i++) {
-      ABSL_INTERNAL_LOG(INFO, absl::StrCat(points[i], ": ", buckets[i],
-                                           " vs. E=", expected[i]));
-    }
-    ABSL_INTERNAL_LOG(INFO, absl::StrCat("trials ", trials));
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrCat("mean ", avg, " vs. expected ", mean()));
-    ABSL_INTERNAL_LOG(INFO, absl::StrCat(kChiSquared, "(data, ", dof, ") = ",
-                                         chi_square, " (", p_actual, ")"));
-    ABSL_INTERNAL_LOG(INFO,
-                      absl::StrCat(kChiSquared, " @ 0.9995 = ", threshold));
-    FAIL() << kChiSquared << " value of " << chi_square
-           << " is above the threshold.";
-  }
-}
-
-std::vector<zipf_u64::param_type> GenParams() {
-  using param = zipf_u64::param_type;
-  const auto k = param().k();
-  const auto q = param().q();
-  const auto v = param().v();
-  const uint64_t k2 = 1 << 10;
-  return std::vector<zipf_u64::param_type>{
-      // Default
-      param(k, q, v),
-      // vary K
-      param(4, q, v), param(1 << 4, q, v), param(k2, q, v),
-      // vary V
-      param(k2, q, 0.5), param(k2, q, 1.5), param(k2, q, 2.5), param(k2, q, 10),
-      // vary Q
-      param(k2, 1.5, v), param(k2, 3, v), param(k2, 5, v), param(k2, 10, v),
-      // Vary V & Q
-      param(k2, 1.5, 0.5), param(k2, 3, 1.5), param(k, 10, 10)};
-}
-
-std::string ParamName(
-    const ::testing::TestParamInfo<zipf_u64::param_type>& info) {
-  const auto& p = info.param;
-  std::string name = absl::StrCat("k_", p.k(), "__q_", absl::SixDigits(p.q()),
-                                  "__v_", absl::SixDigits(p.v()));
-  return absl::StrReplaceAll(name, {{"+", "_"}, {"-", "_"}, {".", "_"}});
-}
-
-INSTANTIATE_TEST_SUITE_P(All, ZipfTest, ::testing::ValuesIn(GenParams()),
-                         ParamName);
-
-// NOTE: absl::zipf_distribution is not guaranteed to be stable.
-TEST(ZipfDistributionTest, StabilityTest) {
-  // absl::zipf_distribution stability relies on
-  // absl::uniform_real_distribution, std::log, std::exp, std::log1p
-  absl::random_internal::sequence_urbg urbg(
-      {0x0003eb76f6f7f755ull, 0xFFCEA50FDB2F953Bull, 0xC332DDEFBE6C5AA5ull,
-       0x6558218568AB9702ull, 0x2AEF7DAD5B6E2F84ull, 0x1521B62829076170ull,
-       0xECDD4775619F1510ull, 0x13CCA830EB61BD96ull, 0x0334FE1EAA0363CFull,
-       0xB5735C904C70A239ull, 0xD59E9E0BCBAADE14ull, 0xEECC86BC60622CA7ull});
-
-  std::vector<int> output(10);
-
-  {
-    absl::zipf_distribution<int32_t> dist;
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-    EXPECT_THAT(output, ElementsAre(10031, 0, 0, 3, 6, 0, 7, 47, 0, 0));
-  }
-  urbg.reset();
-  {
-    absl::zipf_distribution<int32_t> dist(std::numeric_limits<int32_t>::max(),
-                                          3.3);
-    std::generate(std::begin(output), std::end(output),
-                  [&] { return dist(urbg); });
-    EXPECT_THAT(output, ElementsAre(44, 0, 0, 0, 0, 1, 0, 1, 3, 0));
-  }
-}
-
-TEST(ZipfDistributionTest, AlgorithmBounds) {
-  absl::zipf_distribution<int32_t> dist;
-
-  // Small values from absl::uniform_real_distribution map to larger Zipf
-  // distribution values.
-  const std::pair<uint64_t, int32_t> kInputs[] = {
-      {0xffffffffffffffff, 0x0}, {0x7fffffffffffffff, 0x0},
-      {0x3ffffffffffffffb, 0x1}, {0x1ffffffffffffffd, 0x4},
-      {0xffffffffffffffe, 0x9},  {0x7ffffffffffffff, 0x12},
-      {0x3ffffffffffffff, 0x25}, {0x1ffffffffffffff, 0x4c},
-      {0xffffffffffffff, 0x99},  {0x7fffffffffffff, 0x132},
-      {0x3fffffffffffff, 0x265}, {0x1fffffffffffff, 0x4cc},
-      {0xfffffffffffff, 0x999},  {0x7ffffffffffff, 0x1332},
-      {0x3ffffffffffff, 0x2665}, {0x1ffffffffffff, 0x4ccc},
-      {0xffffffffffff, 0x9998},  {0x7fffffffffff, 0x1332f},
-      {0x3fffffffffff, 0x2665a}, {0x1fffffffffff, 0x4cc9e},
-      {0xfffffffffff, 0x998e0},  {0x7ffffffffff, 0x133051},
-      {0x3ffffffffff, 0x265ae4}, {0x1ffffffffff, 0x4c9ed3},
-      {0xffffffffff, 0x98e223},  {0x7fffffffff, 0x13058c4},
-      {0x3fffffffff, 0x25b178e}, {0x1fffffffff, 0x4a062b2},
-      {0xfffffffff, 0x8ee23b8},  {0x7ffffffff, 0x10b21642},
-      {0x3ffffffff, 0x1d89d89d}, {0x1ffffffff, 0x2fffffff},
-      {0xffffffff, 0x45d1745d},  {0x7fffffff, 0x5a5a5a5a},
-      {0x3fffffff, 0x69ee5846},  {0x1fffffff, 0x73ecade3},
-      {0xfffffff, 0x79a9d260},   {0x7ffffff, 0x7cc0532b},
-      {0x3ffffff, 0x7e5ad146},   {0x1ffffff, 0x7f2c0bec},
-      {0xffffff, 0x7f95adef},    {0x7fffff, 0x7fcac0da},
-      {0x3fffff, 0x7fe55ae2},    {0x1fffff, 0x7ff2ac0e},
-      {0xfffff, 0x7ff955ae},     {0x7ffff, 0x7ffcaac1},
-      {0x3ffff, 0x7ffe555b},     {0x1ffff, 0x7fff2aac},
-      {0xffff, 0x7fff9556},      {0x7fff, 0x7fffcaab},
-      {0x3fff, 0x7fffe555},      {0x1fff, 0x7ffff2ab},
-      {0xfff, 0x7ffff955},       {0x7ff, 0x7ffffcab},
-      {0x3ff, 0x7ffffe55},       {0x1ff, 0x7fffff2b},
-      {0xff, 0x7fffff95},        {0x7f, 0x7fffffcb},
-      {0x3f, 0x7fffffe5},        {0x1f, 0x7ffffff3},
-      {0xf, 0x7ffffff9},         {0x7, 0x7ffffffd},
-      {0x3, 0x7ffffffe},         {0x1, 0x7fffffff},
-  };
-
-  for (const auto& instance : kInputs) {
-    absl::random_internal::sequence_urbg urbg({instance.first});
-    EXPECT_EQ(instance.second, dist(urbg));
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/status/BUILD.bazel b/third_party/abseil/absl/status/BUILD.bazel
deleted file mode 100644
index 189bd73..0000000
--- a/third_party/abseil/absl/status/BUILD.bazel
+++ /dev/null
@@ -1,103 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This package contains `absl::Status`.
-# It will expand later to have utilities around `Status` like `StatusOr`,
-# `StatusBuilder` and macros.
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "status",
-    srcs = [
-        "internal/status_internal.h",
-        "status.cc",
-        "status_payload_printer.cc",
-    ],
-    hdrs = [
-        "status.h",
-        "status_payload_printer.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        "//absl/base:atomic_hook",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/container:inlined_vector",
-        "//absl/debugging:stacktrace",
-        "//absl/debugging:symbolize",
-        "//absl/strings",
-        "//absl/strings:cord",
-        "//absl/strings:str_format",
-        "//absl/types:optional",
-    ],
-)
-
-cc_test(
-    name = "status_test",
-    srcs = ["status_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":status",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "statusor",
-    srcs = [
-        "internal/statusor_internal.h",
-        "statusor.cc",
-    ],
-    hdrs = [
-        "statusor.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        ":status",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/types:variant",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "statusor_test",
-    size = "small",
-    srcs = ["statusor_test.cc"],
-    deps = [
-        ":status",
-        ":statusor",
-        "//absl/base",
-        "//absl/memory",
-        "//absl/types:any",
-        "//absl/utility",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/status/CMakeLists.txt b/third_party/abseil/absl/status/CMakeLists.txt
deleted file mode 100644
index f0d798a..0000000
--- a/third_party/abseil/absl/status/CMakeLists.txt
+++ /dev/null
@@ -1,88 +0,0 @@
-#
-# Copyright 2020 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-absl_cc_library(
-  NAME
-    status
-  HDRS
-    "status.h"
-  SRCS
-    "internal/status_internal.h"
-    "status.cc"
-    "status_payload_printer.h"
-    "status_payload_printer.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::atomic_hook
-    absl::config
-    absl::core_headers
-    absl::raw_logging_internal
-    absl::inlined_vector
-    absl::stacktrace
-    absl::symbolize
-    absl::strings
-    absl::cord
-    absl::str_format
-    absl::optional
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    status_test
-  SRCS
-   "status_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::status
-    absl::strings
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    statusor
-  HDRS
-    "statusor.h"
-  SRCS
-    "statusor.cc"
-    "internal/statusor_internal.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::status
-    absl::core_headers
-    absl::raw_logging_internal
-    absl::type_traits
-    absl::strings
-    absl::utility
-    absl::variant
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    statusor_test
-  SRCS
-   "statusor_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::status
-    absl::statusor
-    gmock_main
-)
diff --git a/third_party/abseil/absl/status/internal/status_internal.h b/third_party/abseil/absl/status/internal/status_internal.h
deleted file mode 100644
index 279f8f5..0000000
--- a/third_party/abseil/absl/status/internal/status_internal.h
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#ifndef ABSL_STATUS_INTERNAL_STATUS_INTERNAL_H_
-#define ABSL_STATUS_INTERNAL_STATUS_INTERNAL_H_
-
-#include <string>
-
-#include "absl/container/inlined_vector.h"
-#include "absl/strings/cord.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-enum class StatusCode : int;
-
-namespace status_internal {
-
-// Container for status payloads.
-struct Payload {
-  std::string type_url;
-  absl::Cord payload;
-};
-
-using Payloads = absl::InlinedVector<Payload, 1>;
-
-// Reference-counted representation of Status data.
-struct StatusRep {
-  StatusRep(absl::StatusCode code, std::string message,
-            std::unique_ptr<status_internal::Payloads> payloads)
-      : ref(int32_t{1}),
-        code(code),
-        message(std::move(message)),
-        payloads(std::move(payloads)) {}
-
-  std::atomic<int32_t> ref;
-  absl::StatusCode code;
-  std::string message;
-  std::unique_ptr<status_internal::Payloads> payloads;
-};
-
-absl::StatusCode MapToLocalCode(int value);
-}  // namespace status_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STATUS_INTERNAL_STATUS_INTERNAL_H_
diff --git a/third_party/abseil/absl/status/internal/statusor_internal.h b/third_party/abseil/absl/status/internal/statusor_internal.h
deleted file mode 100644
index eaac2c0..0000000
--- a/third_party/abseil/absl/status/internal/statusor_internal.h
+++ /dev/null
@@ -1,396 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#ifndef ABSL_STATUS_INTERNAL_STATUSOR_INTERNAL_H_
-#define ABSL_STATUS_INTERNAL_STATUSOR_INTERNAL_H_
-
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/attributes.h"
-#include "absl/meta/type_traits.h"
-#include "absl/status/status.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-template <typename T>
-class ABSL_MUST_USE_RESULT StatusOr;
-
-namespace internal_statusor {
-
-// Detects whether `U` has conversion operator to `StatusOr<T>`, i.e. `operator
-// StatusOr<T>()`.
-template <typename T, typename U, typename = void>
-struct HasConversionOperatorToStatusOr : std::false_type {};
-
-template <typename T, typename U>
-void test(char (*)[sizeof(std::declval<U>().operator absl::StatusOr<T>())]);
-
-template <typename T, typename U>
-struct HasConversionOperatorToStatusOr<T, U, decltype(test<T, U>(0))>
-    : std::true_type {};
-
-// Detects whether `T` is constructible or convertible from `StatusOr<U>`.
-template <typename T, typename U>
-using IsConstructibleOrConvertibleFromStatusOr =
-    absl::disjunction<std::is_constructible<T, StatusOr<U>&>,
-                      std::is_constructible<T, const StatusOr<U>&>,
-                      std::is_constructible<T, StatusOr<U>&&>,
-                      std::is_constructible<T, const StatusOr<U>&&>,
-                      std::is_convertible<StatusOr<U>&, T>,
-                      std::is_convertible<const StatusOr<U>&, T>,
-                      std::is_convertible<StatusOr<U>&&, T>,
-                      std::is_convertible<const StatusOr<U>&&, T>>;
-
-// Detects whether `T` is constructible or convertible or assignable from
-// `StatusOr<U>`.
-template <typename T, typename U>
-using IsConstructibleOrConvertibleOrAssignableFromStatusOr =
-    absl::disjunction<IsConstructibleOrConvertibleFromStatusOr<T, U>,
-                      std::is_assignable<T&, StatusOr<U>&>,
-                      std::is_assignable<T&, const StatusOr<U>&>,
-                      std::is_assignable<T&, StatusOr<U>&&>,
-                      std::is_assignable<T&, const StatusOr<U>&&>>;
-
-// Detects whether direct initializing `StatusOr<T>` from `U` is ambiguous, i.e.
-// when `U` is `StatusOr<V>` and `T` is constructible or convertible from `V`.
-template <typename T, typename U>
-struct IsDirectInitializationAmbiguous
-    : public absl::conditional_t<
-          std::is_same<absl::remove_cv_t<absl::remove_reference_t<U>>,
-                       U>::value,
-          std::false_type,
-          IsDirectInitializationAmbiguous<
-              T, absl::remove_cv_t<absl::remove_reference_t<U>>>> {};
-
-template <typename T, typename V>
-struct IsDirectInitializationAmbiguous<T, absl::StatusOr<V>>
-    : public IsConstructibleOrConvertibleFromStatusOr<T, V> {};
-
-// Checks against the constraints of the direction initialization, i.e. when
-// `StatusOr<T>::StatusOr(U&&)` should participate in overload resolution.
-template <typename T, typename U>
-using IsDirectInitializationValid = absl::disjunction<
-    // Short circuits if T is basically U.
-    std::is_same<T, absl::remove_cv_t<absl::remove_reference_t<U>>>,
-    absl::negation<absl::disjunction<
-        std::is_same<absl::StatusOr<T>,
-                     absl::remove_cv_t<absl::remove_reference_t<U>>>,
-        std::is_same<absl::Status,
-                     absl::remove_cv_t<absl::remove_reference_t<U>>>,
-        std::is_same<absl::in_place_t,
-                     absl::remove_cv_t<absl::remove_reference_t<U>>>,
-        IsDirectInitializationAmbiguous<T, U>>>>;
-
-// This trait detects whether `StatusOr<T>::operator=(U&&)` is ambiguous, which
-// is equivalent to whether all the following conditions are met:
-// 1. `U` is `StatusOr<V>`.
-// 2. `T` is constructible and assignable from `V`.
-// 3. `T` is constructible and assignable from `U` (i.e. `StatusOr<V>`).
-// For example, the following code is considered ambiguous:
-// (`T` is `bool`, `U` is `StatusOr<bool>`, `V` is `bool`)
-//   StatusOr<bool> s1 = true;  // s1.ok() && s1.ValueOrDie() == true
-//   StatusOr<bool> s2 = false;  // s2.ok() && s2.ValueOrDie() == false
-//   s1 = s2;  // ambiguous, `s1 = s2.ValueOrDie()` or `s1 = bool(s2)`?
-template <typename T, typename U>
-struct IsForwardingAssignmentAmbiguous
-    : public absl::conditional_t<
-          std::is_same<absl::remove_cv_t<absl::remove_reference_t<U>>,
-                       U>::value,
-          std::false_type,
-          IsForwardingAssignmentAmbiguous<
-              T, absl::remove_cv_t<absl::remove_reference_t<U>>>> {};
-
-template <typename T, typename U>
-struct IsForwardingAssignmentAmbiguous<T, absl::StatusOr<U>>
-    : public IsConstructibleOrConvertibleOrAssignableFromStatusOr<T, U> {};
-
-// Checks against the constraints of the forwarding assignment, i.e. whether
-// `StatusOr<T>::operator(U&&)` should participate in overload resolution.
-template <typename T, typename U>
-using IsForwardingAssignmentValid = absl::disjunction<
-    // Short circuits if T is basically U.
-    std::is_same<T, absl::remove_cv_t<absl::remove_reference_t<U>>>,
-    absl::negation<absl::disjunction<
-        std::is_same<absl::StatusOr<T>,
-                     absl::remove_cv_t<absl::remove_reference_t<U>>>,
-        std::is_same<absl::Status,
-                     absl::remove_cv_t<absl::remove_reference_t<U>>>,
-        std::is_same<absl::in_place_t,
-                     absl::remove_cv_t<absl::remove_reference_t<U>>>,
-        IsForwardingAssignmentAmbiguous<T, U>>>>;
-
-class Helper {
- public:
-  // Move type-agnostic error handling to the .cc.
-  static void HandleInvalidStatusCtorArg(Status*);
-  ABSL_ATTRIBUTE_NORETURN static void Crash(const absl::Status& status);
-};
-
-// Construct an instance of T in `p` through placement new, passing Args... to
-// the constructor.
-// This abstraction is here mostly for the gcc performance fix.
-template <typename T, typename... Args>
-ABSL_ATTRIBUTE_NONNULL(1) void PlacementNew(void* p, Args&&... args) {
-  new (p) T(std::forward<Args>(args)...);
-}
-
-// Helper base class to hold the data and all operations.
-// We move all this to a base class to allow mixing with the appropriate
-// TraitsBase specialization.
-template <typename T>
-class StatusOrData {
-  template <typename U>
-  friend class StatusOrData;
-
- public:
-  StatusOrData() = delete;
-
-  StatusOrData(const StatusOrData& other) {
-    if (other.ok()) {
-      MakeValue(other.data_);
-      MakeStatus();
-    } else {
-      MakeStatus(other.status_);
-    }
-  }
-
-  StatusOrData(StatusOrData&& other) noexcept {
-    if (other.ok()) {
-      MakeValue(std::move(other.data_));
-      MakeStatus();
-    } else {
-      MakeStatus(std::move(other.status_));
-    }
-  }
-
-  template <typename U>
-  explicit StatusOrData(const StatusOrData<U>& other) {
-    if (other.ok()) {
-      MakeValue(other.data_);
-      MakeStatus();
-    } else {
-      MakeStatus(other.status_);
-    }
-  }
-
-  template <typename U>
-  explicit StatusOrData(StatusOrData<U>&& other) {
-    if (other.ok()) {
-      MakeValue(std::move(other.data_));
-      MakeStatus();
-    } else {
-      MakeStatus(std::move(other.status_));
-    }
-  }
-
-  template <typename... Args>
-  explicit StatusOrData(absl::in_place_t, Args&&... args)
-      : data_(std::forward<Args>(args)...) {
-    MakeStatus();
-  }
-
-  explicit StatusOrData(const T& value) : data_(value) {
-    MakeStatus();
-  }
-  explicit StatusOrData(T&& value) : data_(std::move(value)) {
-    MakeStatus();
-  }
-
-  template <typename U,
-            absl::enable_if_t<std::is_constructible<absl::Status, U&&>::value,
-                              int> = 0>
-  explicit StatusOrData(U&& v) : status_(std::forward<U>(v)) {
-    EnsureNotOk();
-  }
-
-  StatusOrData& operator=(const StatusOrData& other) {
-    if (this == &other) return *this;
-    if (other.ok())
-      Assign(other.data_);
-    else
-      AssignStatus(other.status_);
-    return *this;
-  }
-
-  StatusOrData& operator=(StatusOrData&& other) {
-    if (this == &other) return *this;
-    if (other.ok())
-      Assign(std::move(other.data_));
-    else
-      AssignStatus(std::move(other.status_));
-    return *this;
-  }
-
-  ~StatusOrData() {
-    if (ok()) {
-      status_.~Status();
-      data_.~T();
-    } else {
-      status_.~Status();
-    }
-  }
-
-  template <typename U>
-  void Assign(U&& value) {
-    if (ok()) {
-      data_ = std::forward<U>(value);
-    } else {
-      MakeValue(std::forward<U>(value));
-      status_ = OkStatus();
-    }
-  }
-
-  template <typename U>
-  void AssignStatus(U&& v) {
-    Clear();
-    status_ = static_cast<absl::Status>(std::forward<U>(v));
-    EnsureNotOk();
-  }
-
-  bool ok() const { return status_.ok(); }
-
- protected:
-  // status_ will always be active after the constructor.
-  // We make it a union to be able to initialize exactly how we need without
-  // waste.
-  // Eg. in the copy constructor we use the default constructor of Status in
-  // the ok() path to avoid an extra Ref call.
-  union {
-    Status status_;
-  };
-
-  // data_ is active iff status_.ok()==true
-  struct Dummy {};
-  union {
-    // When T is const, we need some non-const object we can cast to void* for
-    // the placement new. dummy_ is that object.
-    Dummy dummy_;
-    T data_;
-  };
-
-  void Clear() {
-    if (ok()) data_.~T();
-  }
-
-  void EnsureOk() const {
-    if (ABSL_PREDICT_FALSE(!ok())) Helper::Crash(status_);
-  }
-
-  void EnsureNotOk() {
-    if (ABSL_PREDICT_FALSE(ok())) Helper::HandleInvalidStatusCtorArg(&status_);
-  }
-
-  // Construct the value (ie. data_) through placement new with the passed
-  // argument.
-  template <typename... Arg>
-  void MakeValue(Arg&&... arg) {
-    internal_statusor::PlacementNew<T>(&dummy_, std::forward<Arg>(arg)...);
-  }
-
-  // Construct the status (ie. status_) through placement new with the passed
-  // argument.
-  template <typename... Args>
-  void MakeStatus(Args&&... args) {
-    internal_statusor::PlacementNew<Status>(&status_,
-                                            std::forward<Args>(args)...);
-  }
-};
-
-// Helper base classes to allow implicitly deleted constructors and assignment
-// operators in `StatusOr`. For example, `CopyCtorBase` will explicitly delete
-// the copy constructor when T is not copy constructible and `StatusOr` will
-// inherit that behavior implicitly.
-template <typename T, bool = std::is_copy_constructible<T>::value>
-struct CopyCtorBase {
-  CopyCtorBase() = default;
-  CopyCtorBase(const CopyCtorBase&) = default;
-  CopyCtorBase(CopyCtorBase&&) = default;
-  CopyCtorBase& operator=(const CopyCtorBase&) = default;
-  CopyCtorBase& operator=(CopyCtorBase&&) = default;
-};
-
-template <typename T>
-struct CopyCtorBase<T, false> {
-  CopyCtorBase() = default;
-  CopyCtorBase(const CopyCtorBase&) = delete;
-  CopyCtorBase(CopyCtorBase&&) = default;
-  CopyCtorBase& operator=(const CopyCtorBase&) = default;
-  CopyCtorBase& operator=(CopyCtorBase&&) = default;
-};
-
-template <typename T, bool = std::is_move_constructible<T>::value>
-struct MoveCtorBase {
-  MoveCtorBase() = default;
-  MoveCtorBase(const MoveCtorBase&) = default;
-  MoveCtorBase(MoveCtorBase&&) = default;
-  MoveCtorBase& operator=(const MoveCtorBase&) = default;
-  MoveCtorBase& operator=(MoveCtorBase&&) = default;
-};
-
-template <typename T>
-struct MoveCtorBase<T, false> {
-  MoveCtorBase() = default;
-  MoveCtorBase(const MoveCtorBase&) = default;
-  MoveCtorBase(MoveCtorBase&&) = delete;
-  MoveCtorBase& operator=(const MoveCtorBase&) = default;
-  MoveCtorBase& operator=(MoveCtorBase&&) = default;
-};
-
-template <typename T, bool = std::is_copy_constructible<T>::value&&
-                          std::is_copy_assignable<T>::value>
-struct CopyAssignBase {
-  CopyAssignBase() = default;
-  CopyAssignBase(const CopyAssignBase&) = default;
-  CopyAssignBase(CopyAssignBase&&) = default;
-  CopyAssignBase& operator=(const CopyAssignBase&) = default;
-  CopyAssignBase& operator=(CopyAssignBase&&) = default;
-};
-
-template <typename T>
-struct CopyAssignBase<T, false> {
-  CopyAssignBase() = default;
-  CopyAssignBase(const CopyAssignBase&) = default;
-  CopyAssignBase(CopyAssignBase&&) = default;
-  CopyAssignBase& operator=(const CopyAssignBase&) = delete;
-  CopyAssignBase& operator=(CopyAssignBase&&) = default;
-};
-
-template <typename T, bool = std::is_move_constructible<T>::value&&
-                          std::is_move_assignable<T>::value>
-struct MoveAssignBase {
-  MoveAssignBase() = default;
-  MoveAssignBase(const MoveAssignBase&) = default;
-  MoveAssignBase(MoveAssignBase&&) = default;
-  MoveAssignBase& operator=(const MoveAssignBase&) = default;
-  MoveAssignBase& operator=(MoveAssignBase&&) = default;
-};
-
-template <typename T>
-struct MoveAssignBase<T, false> {
-  MoveAssignBase() = default;
-  MoveAssignBase(const MoveAssignBase&) = default;
-  MoveAssignBase(MoveAssignBase&&) = default;
-  MoveAssignBase& operator=(const MoveAssignBase&) = default;
-  MoveAssignBase& operator=(MoveAssignBase&&) = delete;
-};
-
-ABSL_ATTRIBUTE_NORETURN void ThrowBadStatusOrAccess(absl::Status status);
-
-}  // namespace internal_statusor
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STATUS_INTERNAL_STATUSOR_INTERNAL_H_
diff --git a/third_party/abseil/absl/status/status.cc b/third_party/abseil/absl/status/status.cc
deleted file mode 100644
index c71de84..0000000
--- a/third_party/abseil/absl/status/status.cc
+++ /dev/null
@@ -1,442 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include "absl/status/status.h"
-
-#include <cassert>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/status/status_payload_printer.h"
-#include "absl/strings/escaping.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_split.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-std::string StatusCodeToString(StatusCode code) {
-  switch (code) {
-    case StatusCode::kOk:
-      return "OK";
-    case StatusCode::kCancelled:
-      return "CANCELLED";
-    case StatusCode::kUnknown:
-      return "UNKNOWN";
-    case StatusCode::kInvalidArgument:
-      return "INVALID_ARGUMENT";
-    case StatusCode::kDeadlineExceeded:
-      return "DEADLINE_EXCEEDED";
-    case StatusCode::kNotFound:
-      return "NOT_FOUND";
-    case StatusCode::kAlreadyExists:
-      return "ALREADY_EXISTS";
-    case StatusCode::kPermissionDenied:
-      return "PERMISSION_DENIED";
-    case StatusCode::kUnauthenticated:
-      return "UNAUTHENTICATED";
-    case StatusCode::kResourceExhausted:
-      return "RESOURCE_EXHAUSTED";
-    case StatusCode::kFailedPrecondition:
-      return "FAILED_PRECONDITION";
-    case StatusCode::kAborted:
-      return "ABORTED";
-    case StatusCode::kOutOfRange:
-      return "OUT_OF_RANGE";
-    case StatusCode::kUnimplemented:
-      return "UNIMPLEMENTED";
-    case StatusCode::kInternal:
-      return "INTERNAL";
-    case StatusCode::kUnavailable:
-      return "UNAVAILABLE";
-    case StatusCode::kDataLoss:
-      return "DATA_LOSS";
-    default:
-      return "";
-  }
-}
-
-std::ostream& operator<<(std::ostream& os, StatusCode code) {
-  return os << StatusCodeToString(code);
-}
-
-namespace status_internal {
-
-static int FindPayloadIndexByUrl(const Payloads* payloads,
-                                 absl::string_view type_url) {
-  if (payloads == nullptr) return -1;
-
-  for (size_t i = 0; i < payloads->size(); ++i) {
-    if ((*payloads)[i].type_url == type_url) return i;
-  }
-
-  return -1;
-}
-
-// Convert canonical code to a value known to this binary.
-absl::StatusCode MapToLocalCode(int value) {
-  absl::StatusCode code = static_cast<absl::StatusCode>(value);
-  switch (code) {
-    case absl::StatusCode::kOk:
-    case absl::StatusCode::kCancelled:
-    case absl::StatusCode::kUnknown:
-    case absl::StatusCode::kInvalidArgument:
-    case absl::StatusCode::kDeadlineExceeded:
-    case absl::StatusCode::kNotFound:
-    case absl::StatusCode::kAlreadyExists:
-    case absl::StatusCode::kPermissionDenied:
-    case absl::StatusCode::kResourceExhausted:
-    case absl::StatusCode::kFailedPrecondition:
-    case absl::StatusCode::kAborted:
-    case absl::StatusCode::kOutOfRange:
-    case absl::StatusCode::kUnimplemented:
-    case absl::StatusCode::kInternal:
-    case absl::StatusCode::kUnavailable:
-    case absl::StatusCode::kDataLoss:
-    case absl::StatusCode::kUnauthenticated:
-      return code;
-    default:
-      return absl::StatusCode::kUnknown;
-  }
-}
-}  // namespace status_internal
-
-absl::optional<absl::Cord> Status::GetPayload(
-    absl::string_view type_url) const {
-  const auto* payloads = GetPayloads();
-  int index = status_internal::FindPayloadIndexByUrl(payloads, type_url);
-  if (index != -1) return (*payloads)[index].payload;
-
-  return absl::nullopt;
-}
-
-void Status::SetPayload(absl::string_view type_url, absl::Cord payload) {
-  if (ok()) return;
-
-  PrepareToModify();
-
-  status_internal::StatusRep* rep = RepToPointer(rep_);
-  if (!rep->payloads) {
-    rep->payloads = absl::make_unique<status_internal::Payloads>();
-  }
-
-  int index =
-      status_internal::FindPayloadIndexByUrl(rep->payloads.get(), type_url);
-  if (index != -1) {
-    (*rep->payloads)[index].payload = std::move(payload);
-    return;
-  }
-
-  rep->payloads->push_back({std::string(type_url), std::move(payload)});
-}
-
-bool Status::ErasePayload(absl::string_view type_url) {
-  int index = status_internal::FindPayloadIndexByUrl(GetPayloads(), type_url);
-  if (index != -1) {
-    PrepareToModify();
-    GetPayloads()->erase(GetPayloads()->begin() + index);
-    if (GetPayloads()->empty() && message().empty()) {
-      // Special case: If this can be represented inlined, it MUST be
-      // inlined (EqualsSlow depends on this behavior).
-      StatusCode c = static_cast<StatusCode>(raw_code());
-      Unref(rep_);
-      rep_ = CodeToInlinedRep(c);
-    }
-    return true;
-  }
-
-  return false;
-}
-
-void Status::ForEachPayload(
-    const std::function<void(absl::string_view, const absl::Cord&)>& visitor)
-    const {
-  if (auto* payloads = GetPayloads()) {
-    bool in_reverse =
-        payloads->size() > 1 && reinterpret_cast<uintptr_t>(payloads) % 13 > 6;
-
-    for (size_t index = 0; index < payloads->size(); ++index) {
-      const auto& elem =
-          (*payloads)[in_reverse ? payloads->size() - 1 - index : index];
-
-#ifdef NDEBUG
-      visitor(elem.type_url, elem.payload);
-#else
-      // In debug mode invalidate the type url to prevent users from relying on
-      // this string lifetime.
-
-      // NOLINTNEXTLINE intentional extra conversion to force temporary.
-      visitor(std::string(elem.type_url), elem.payload);
-#endif  // NDEBUG
-    }
-  }
-}
-
-const std::string* Status::EmptyString() {
-  static std::string* empty_string = new std::string();
-  return empty_string;
-}
-
-constexpr const char Status::kMovedFromString[];
-
-const std::string* Status::MovedFromString() {
-  static std::string* moved_from_string = new std::string(kMovedFromString);
-  return moved_from_string;
-}
-
-void Status::UnrefNonInlined(uintptr_t rep) {
-  status_internal::StatusRep* r = RepToPointer(rep);
-  // Fast path: if ref==1, there is no need for a RefCountDec (since
-  // this is the only reference and therefore no other thread is
-  // allowed to be mucking with r).
-  if (r->ref.load(std::memory_order_acquire) == 1 ||
-      r->ref.fetch_sub(1, std::memory_order_acq_rel) - 1 == 0) {
-    delete r;
-  }
-}
-
-uintptr_t Status::NewRep(absl::StatusCode code, absl::string_view msg,
-                         std::unique_ptr<status_internal::Payloads> payloads) {
-  status_internal::StatusRep* rep = new status_internal::StatusRep(
-      code, std::string(msg.data(), msg.size()), std::move(payloads));
-  return PointerToRep(rep);
-}
-
-Status::Status(absl::StatusCode code, absl::string_view msg)
-    : rep_(CodeToInlinedRep(code)) {
-  if (code != absl::StatusCode::kOk && !msg.empty()) {
-    rep_ = NewRep(code, msg, nullptr);
-  }
-}
-
-int Status::raw_code() const {
-  if (IsInlined(rep_)) {
-    return static_cast<int>(InlinedRepToCode(rep_));
-  }
-  status_internal::StatusRep* rep = RepToPointer(rep_);
-  return static_cast<int>(rep->code);
-}
-
-absl::StatusCode Status::code() const {
-  return status_internal::MapToLocalCode(raw_code());
-}
-
-void Status::PrepareToModify() {
-  ABSL_RAW_CHECK(!ok(), "PrepareToModify shouldn't be called on OK status.");
-  if (IsInlined(rep_)) {
-    rep_ = NewRep(static_cast<absl::StatusCode>(raw_code()),
-                  absl::string_view(), nullptr);
-    return;
-  }
-
-  uintptr_t rep_i = rep_;
-  status_internal::StatusRep* rep = RepToPointer(rep_);
-  if (rep->ref.load(std::memory_order_acquire) != 1) {
-    std::unique_ptr<status_internal::Payloads> payloads;
-    if (rep->payloads) {
-      payloads = absl::make_unique<status_internal::Payloads>(*rep->payloads);
-    }
-    rep_ = NewRep(rep->code, message(), std::move(payloads));
-    UnrefNonInlined(rep_i);
-  }
-}
-
-bool Status::EqualsSlow(const absl::Status& a, const absl::Status& b) {
-  if (IsInlined(a.rep_) != IsInlined(b.rep_)) return false;
-  if (a.message() != b.message()) return false;
-  if (a.raw_code() != b.raw_code()) return false;
-  if (a.GetPayloads() == b.GetPayloads()) return true;
-
-  const status_internal::Payloads no_payloads;
-  const status_internal::Payloads* larger_payloads =
-      a.GetPayloads() ? a.GetPayloads() : &no_payloads;
-  const status_internal::Payloads* smaller_payloads =
-      b.GetPayloads() ? b.GetPayloads() : &no_payloads;
-  if (larger_payloads->size() < smaller_payloads->size()) {
-    std::swap(larger_payloads, smaller_payloads);
-  }
-  if ((larger_payloads->size() - smaller_payloads->size()) > 1) return false;
-  // Payloads can be ordered differently, so we can't just compare payload
-  // vectors.
-  for (const auto& payload : *larger_payloads) {
-
-    bool found = false;
-    for (const auto& other_payload : *smaller_payloads) {
-      if (payload.type_url == other_payload.type_url) {
-        if (payload.payload != other_payload.payload) {
-          return false;
-        }
-        found = true;
-        break;
-      }
-    }
-    if (!found) return false;
-  }
-  return true;
-}
-
-std::string Status::ToStringSlow() const {
-  std::string text;
-  absl::StrAppend(&text, absl::StatusCodeToString(code()), ": ", message());
-  status_internal::StatusPayloadPrinter printer =
-      status_internal::GetStatusPayloadPrinter();
-  this->ForEachPayload([&](absl::string_view type_url,
-                           const absl::Cord& payload) {
-    absl::optional<std::string> result;
-    if (printer) result = printer(type_url, payload);
-    absl::StrAppend(
-        &text, " [", type_url, "='",
-        result.has_value() ? *result : absl::CHexEscape(std::string(payload)),
-        "']");
-  });
-
-  return text;
-}
-
-std::ostream& operator<<(std::ostream& os, const Status& x) {
-  os << x.ToString();
-  return os;
-}
-
-Status AbortedError(absl::string_view message) {
-  return Status(absl::StatusCode::kAborted, message);
-}
-
-Status AlreadyExistsError(absl::string_view message) {
-  return Status(absl::StatusCode::kAlreadyExists, message);
-}
-
-Status CancelledError(absl::string_view message) {
-  return Status(absl::StatusCode::kCancelled, message);
-}
-
-Status DataLossError(absl::string_view message) {
-  return Status(absl::StatusCode::kDataLoss, message);
-}
-
-Status DeadlineExceededError(absl::string_view message) {
-  return Status(absl::StatusCode::kDeadlineExceeded, message);
-}
-
-Status FailedPreconditionError(absl::string_view message) {
-  return Status(absl::StatusCode::kFailedPrecondition, message);
-}
-
-Status InternalError(absl::string_view message) {
-  return Status(absl::StatusCode::kInternal, message);
-}
-
-Status InvalidArgumentError(absl::string_view message) {
-  return Status(absl::StatusCode::kInvalidArgument, message);
-}
-
-Status NotFoundError(absl::string_view message) {
-  return Status(absl::StatusCode::kNotFound, message);
-}
-
-Status OutOfRangeError(absl::string_view message) {
-  return Status(absl::StatusCode::kOutOfRange, message);
-}
-
-Status PermissionDeniedError(absl::string_view message) {
-  return Status(absl::StatusCode::kPermissionDenied, message);
-}
-
-Status ResourceExhaustedError(absl::string_view message) {
-  return Status(absl::StatusCode::kResourceExhausted, message);
-}
-
-Status UnauthenticatedError(absl::string_view message) {
-  return Status(absl::StatusCode::kUnauthenticated, message);
-}
-
-Status UnavailableError(absl::string_view message) {
-  return Status(absl::StatusCode::kUnavailable, message);
-}
-
-Status UnimplementedError(absl::string_view message) {
-  return Status(absl::StatusCode::kUnimplemented, message);
-}
-
-Status UnknownError(absl::string_view message) {
-  return Status(absl::StatusCode::kUnknown, message);
-}
-
-bool IsAborted(const Status& status) {
-  return status.code() == absl::StatusCode::kAborted;
-}
-
-bool IsAlreadyExists(const Status& status) {
-  return status.code() == absl::StatusCode::kAlreadyExists;
-}
-
-bool IsCancelled(const Status& status) {
-  return status.code() == absl::StatusCode::kCancelled;
-}
-
-bool IsDataLoss(const Status& status) {
-  return status.code() == absl::StatusCode::kDataLoss;
-}
-
-bool IsDeadlineExceeded(const Status& status) {
-  return status.code() == absl::StatusCode::kDeadlineExceeded;
-}
-
-bool IsFailedPrecondition(const Status& status) {
-  return status.code() == absl::StatusCode::kFailedPrecondition;
-}
-
-bool IsInternal(const Status& status) {
-  return status.code() == absl::StatusCode::kInternal;
-}
-
-bool IsInvalidArgument(const Status& status) {
-  return status.code() == absl::StatusCode::kInvalidArgument;
-}
-
-bool IsNotFound(const Status& status) {
-  return status.code() == absl::StatusCode::kNotFound;
-}
-
-bool IsOutOfRange(const Status& status) {
-  return status.code() == absl::StatusCode::kOutOfRange;
-}
-
-bool IsPermissionDenied(const Status& status) {
-  return status.code() == absl::StatusCode::kPermissionDenied;
-}
-
-bool IsResourceExhausted(const Status& status) {
-  return status.code() == absl::StatusCode::kResourceExhausted;
-}
-
-bool IsUnauthenticated(const Status& status) {
-  return status.code() == absl::StatusCode::kUnauthenticated;
-}
-
-bool IsUnavailable(const Status& status) {
-  return status.code() == absl::StatusCode::kUnavailable;
-}
-
-bool IsUnimplemented(const Status& status) {
-  return status.code() == absl::StatusCode::kUnimplemented;
-}
-
-bool IsUnknown(const Status& status) {
-  return status.code() == absl::StatusCode::kUnknown;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/status/status.h b/third_party/abseil/absl/status/status.h
deleted file mode 100644
index 08d3e80..0000000
--- a/third_party/abseil/absl/status/status.h
+++ /dev/null
@@ -1,820 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: status.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the Abseil `status` library, consisting of:
-//
-//   * An `absl::Status` class for holding error handling information
-//   * A set of canonical `absl::StatusCode` error codes, and associated
-//     utilities for generating and propagating status codes.
-//   * A set of helper functions for creating status codes and checking their
-//     values
-//
-// Within Google, `absl::Status` is the primary mechanism for gracefully
-// handling errors across API boundaries (and in particular across RPC
-// boundaries). Some of these errors may be recoverable, but others may not.
-// Most functions that can produce a recoverable error should be designed to
-// return an `absl::Status` (or `absl::StatusOr`).
-//
-// Example:
-//
-// absl::Status myFunction(absl::string_view fname, ...) {
-//   ...
-//   // encounter error
-//   if (error condition) {
-//     return absl::InvalidArgumentError("bad mode");
-//   }
-//   // else, return OK
-//   return absl::OkStatus();
-// }
-//
-// An `absl::Status` is designed to either return "OK" or one of a number of
-// different error codes, corresponding to typical error conditions.
-// In almost all cases, when using `absl::Status` you should use the canonical
-// error codes (of type `absl::StatusCode`) enumerated in this header file.
-// These canonical codes are understood across the codebase and will be
-// accepted across all API and RPC boundaries.
-#ifndef ABSL_STATUS_STATUS_H_
-#define ABSL_STATUS_STATUS_H_
-
-#include <iostream>
-#include <string>
-
-#include "absl/container/inlined_vector.h"
-#include "absl/status/internal/status_internal.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::StatusCode
-//
-// An `absl::StatusCode` is an enumerated type indicating either no error ("OK")
-// or an error condition. In most cases, an `absl::Status` indicates a
-// recoverable error, and the purpose of signalling an error is to indicate what
-// action to take in response to that error. These error codes map to the proto
-// RPC error codes indicated in https://cloud.google.com/apis/design/errors.
-//
-// The errors listed below are the canonical errors associated with
-// `absl::Status` and are used throughout the codebase. As a result, these
-// error codes are somewhat generic.
-//
-// In general, try to return the most specific error that applies if more than
-// one error may pertain. For example, prefer `kOutOfRange` over
-// `kFailedPrecondition` if both codes apply. Similarly prefer `kNotFound` or
-// `kAlreadyExists` over `kFailedPrecondition`.
-//
-// Because these errors may travel RPC boundaries, these codes are tied to the
-// `google.rpc.Code` definitions within
-// https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto
-// The string value of these RPC codes is denoted within each enum below.
-//
-// If your error handling code requires more context, you can attach payloads
-// to your status. See `absl::Status::SetPayload()` and
-// `absl::Status::GetPayload()` below.
-enum class StatusCode : int {
-  // StatusCode::kOk
-  //
-  // kOK (gRPC code "OK") does not indicate an error; this value is returned on
-  // success. It is typical to check for this value before proceeding on any
-  // given call across an API or RPC boundary. To check this value, use the
-  // `absl::Status::ok()` member function rather than inspecting the raw code.
-  kOk = 0,
-
-  // StatusCode::kCancelled
-  //
-  // kCancelled (gRPC code "CANCELLED") indicates the operation was cancelled,
-  // typically by the caller.
-  kCancelled = 1,
-
-  // StatusCode::kUnknown
-  //
-  // kUnknown (gRPC code "UNKNOWN") indicates an unknown error occurred. In
-  // general, more specific errors should be raised, if possible. Errors raised
-  // by APIs that do not return enough error information may be converted to
-  // this error.
-  kUnknown = 2,
-
-  // StatusCode::kInvalidArgument
-  //
-  // kInvalidArgument (gRPC code "INVALID_ARGUMENT") indicates the caller
-  // specified an invalid argument, such a malformed filename. Note that such
-  // errors should be narrowly limited to indicate to the invalid nature of the
-  // arguments themselves. Errors with validly formed arguments that may cause
-  // errors with the state of the receiving system should be denoted with
-  // `kFailedPrecondition` instead.
-  kInvalidArgument = 3,
-
-  // StatusCode::kDeadlineExceeded
-  //
-  // kDeadlineExceeded (gRPC code "DEADLINE_EXCEEDED") indicates a deadline
-  // expired before the operation could complete. For operations that may change
-  // state within a system, this error may be returned even if the operation has
-  // completed successfully. For example, a successful response from a server
-  // could have been delayed long enough for the deadline to expire.
-  kDeadlineExceeded = 4,
-
-  // StatusCode::kNotFound
-  //
-  // kNotFound (gRPC code "NOT_FOUND") indicates some requested entity (such as
-  // a file or directory) was not found.
-  //
-  // `kNotFound` is useful if a request should be denied for an entire class of
-  // users, such as during a gradual feature rollout or undocumented allow list.
-  // If, instead, a request should be denied for specific sets of users, such as
-  // through user-based access control, use `kPermissionDenied` instead.
-  kNotFound = 5,
-
-  // StatusCode::kAlreadyExists
-  //
-  // kAlreadyExists (gRPC code "ALREADY_EXISTS") indicates the entity that a
-  // caller attempted to create (such as file or directory) is already present.
-  kAlreadyExists = 6,
-
-  // StatusCode::kPermissionDenied
-  //
-  // kPermissionDenied (gRPC code "PERMISSION_DENIED") indicates that the caller
-  // does not have permission to execute the specified operation. Note that this
-  // error is different than an error due to an *un*authenticated user. This
-  // error code does not imply the request is valid or the requested entity
-  // exists or satisfies any other pre-conditions.
-  //
-  // `kPermissionDenied` must not be used for rejections caused by exhausting
-  // some resource. Instead, use `kResourceExhausted` for those errors.
-  // `kPermissionDenied` must not be used if the caller cannot be identified.
-  // Instead, use `kUnauthenticated` for those errors.
-  kPermissionDenied = 7,
-
-  // StatusCode::kResourceExhausted
-  //
-  // kResourceExhausted (gRPC code "RESOURCE_EXHAUSTED") indicates some resource
-  // has been exhausted, perhaps a per-user quota, or perhaps the entire file
-  // system is out of space.
-  kResourceExhausted = 8,
-
-  // StatusCode::kFailedPrecondition
-  //
-  // kFailedPrecondition (gRPC code "FAILED_PRECONDITION") indicates that the
-  // operation was rejected because the system is not in a state required for
-  // the operation's execution. For example, a directory to be deleted may be
-  // non-empty, an "rmdir" operation is applied to a non-directory, etc.
-  //
-  // Some guidelines that may help a service implementer in deciding between
-  // `kFailedPrecondition`, `kAborted`, and `kUnavailable`:
-  //
-  //  (a) Use `kUnavailable` if the client can retry just the failing call.
-  //  (b) Use `kAborted` if the client should retry at a higher transaction
-  //      level (such as when a client-specified test-and-set fails, indicating
-  //      the client should restart a read-modify-write sequence).
-  //  (c) Use `kFailedPrecondition` if the client should not retry until
-  //      the system state has been explicitly fixed. For example, if an "rmdir"
-  //      fails because the directory is non-empty, `kFailedPrecondition`
-  //      should be returned since the client should not retry unless
-  //      the files are deleted from the directory.
-  kFailedPrecondition = 9,
-
-  // StatusCode::kAborted
-  //
-  // kAborted (gRPC code "ABORTED") indicates the operation was aborted,
-  // typically due to a concurrency issue such as a sequencer check failure or a
-  // failed transaction.
-  //
-  // See the guidelines above for deciding between `kFailedPrecondition`,
-  // `kAborted`, and `kUnavailable`.
-  kAborted = 10,
-
-  // StatusCode::kOutOfRange
-  //
-  // kOutOfRange (gRPC code "OUT_OF_RANGE") indicates the operation was
-  // attempted past the valid range, such as seeking or reading past an
-  // end-of-file.
-  //
-  // Unlike `kInvalidArgument`, this error indicates a problem that may
-  // be fixed if the system state changes. For example, a 32-bit file
-  // system will generate `kInvalidArgument` if asked to read at an
-  // offset that is not in the range [0,2^32-1], but it will generate
-  // `kOutOfRange` if asked to read from an offset past the current
-  // file size.
-  //
-  // There is a fair bit of overlap between `kFailedPrecondition` and
-  // `kOutOfRange`.  We recommend using `kOutOfRange` (the more specific
-  // error) when it applies so that callers who are iterating through
-  // a space can easily look for an `kOutOfRange` error to detect when
-  // they are done.
-  kOutOfRange = 11,
-
-  // StatusCode::kUnimplemented
-  //
-  // kUnimplemented (gRPC code "UNIMPLEMENTED") indicates the operation is not
-  // implemented or supported in this service. In this case, the operation
-  // should not be re-attempted.
-  kUnimplemented = 12,
-
-  // StatusCode::kInternal
-  //
-  // kInternal (gRPC code "INTERNAL") indicates an internal error has occurred
-  // and some invariants expected by the underlying system have not been
-  // satisfied. This error code is reserved for serious errors.
-  kInternal = 13,
-
-  // StatusCode::kUnavailable
-  //
-  // kUnavailable (gRPC code "UNAVAILABLE") indicates the service is currently
-  // unavailable and that this is most likely a transient condition. An error
-  // such as this can be corrected by retrying with a backoff scheme. Note that
-  // it is not always safe to retry non-idempotent operations.
-  //
-  // See the guidelines above for deciding between `kFailedPrecondition`,
-  // `kAborted`, and `kUnavailable`.
-  kUnavailable = 14,
-
-  // StatusCode::kDataLoss
-  //
-  // kDataLoss (gRPC code "DATA_LOSS") indicates that unrecoverable data loss or
-  // corruption has occurred. As this error is serious, proper alerting should
-  // be attached to errors such as this.
-  kDataLoss = 15,
-
-  // StatusCode::kUnauthenticated
-  //
-  // kUnauthenticated (gRPC code "UNAUTHENTICATED") indicates that the request
-  // does not have valid authentication credentials for the operation. Correct
-  // the authentication and try again.
-  kUnauthenticated = 16,
-
-  // StatusCode::DoNotUseReservedForFutureExpansionUseDefaultInSwitchInstead_
-  //
-  // NOTE: this error code entry should not be used and you should not rely on
-  // its value, which may change.
-  //
-  // The purpose of this enumerated value is to force people who handle status
-  // codes with `switch()` statements to *not* simply enumerate all possible
-  // values, but instead provide a "default:" case. Providing such a default
-  // case ensures that code will compile when new codes are added.
-  kDoNotUseReservedForFutureExpansionUseDefaultInSwitchInstead_ = 20
-};
-
-// StatusCodeToString()
-//
-// Returns the name for the status code, or "" if it is an unknown value.
-std::string StatusCodeToString(StatusCode code);
-
-// operator<<
-//
-// Streams StatusCodeToString(code) to `os`.
-std::ostream& operator<<(std::ostream& os, StatusCode code);
-
-// absl::Status
-//
-// The `absl::Status` class is generally used to gracefully handle errors
-// across API boundaries (and in particular across RPC boundaries). Some of
-// these errors may be recoverable, but others may not. Most
-// functions which can produce a recoverable error should be designed to return
-// either an `absl::Status` (or the similar `absl::StatusOr<T>`, which holds
-// either an object of type `T` or an error).
-//
-// API developers should construct their functions to return `absl::OkStatus()`
-// upon success, or an `absl::StatusCode` upon another type of error (e.g
-// an `absl::StatusCode::kInvalidArgument` error). The API provides convenience
-// functions to constuct each status code.
-//
-// Example:
-//
-// absl::Status myFunction(absl::string_view fname, ...) {
-//   ...
-//   // encounter error
-//   if (error condition) {
-//     // Construct an absl::StatusCode::kInvalidArgument error
-//     return absl::InvalidArgumentError("bad mode");
-//   }
-//   // else, return OK
-//   return absl::OkStatus();
-// }
-//
-// Users handling status error codes should prefer checking for an OK status
-// using the `ok()` member function. Handling multiple error codes may justify
-// use of switch statement, but only check for error codes you know how to
-// handle; do not try to exhaustively match against all canonical error codes.
-// Errors that cannot be handled should be logged and/or propagated for higher
-// levels to deal with. If you do use a switch statement, make sure that you
-// also provide a `default:` switch case, so that code does not break as other
-// canonical codes are added to the API.
-//
-// Example:
-//
-//   absl::Status result = DoSomething();
-//   if (!result.ok()) {
-//     LOG(ERROR) << result;
-//   }
-//
-//   // Provide a default if switching on multiple error codes
-//   switch (result.code()) {
-//     // The user hasn't authenticated. Ask them to reauth
-//     case absl::StatusCode::kUnauthenticated:
-//       DoReAuth();
-//       break;
-//     // The user does not have permission. Log an error.
-//     case absl::StatusCode::kPermissionDenied:
-//       LOG(ERROR) << result;
-//       break;
-//     // Propagate the error otherwise.
-//     default:
-//       return true;
-//   }
-//
-// An `absl::Status` can optionally include a payload with more information
-// about the error. Typically, this payload serves one of several purposes:
-//
-//   * It may provide more fine-grained semantic information about the error to
-//     facilitate actionable remedies.
-//   * It may provide human-readable contexual information that is more
-//     appropriate to display to an end user.
-//
-// Example:
-//
-//   absl::Status result = DoSomething();
-//   // Inform user to retry after 30 seconds
-//   // See more error details in googleapis/google/rpc/error_details.proto
-//   if (absl::IsResourceExhausted(result)) {
-//     google::rpc::RetryInfo info;
-//     info.retry_delay().seconds() = 30;
-//     // Payloads require a unique key (a URL to ensure no collisions with
-//     // other payloads), and an `absl::Cord` to hold the encoded data.
-//     absl::string_view url = "type.googleapis.com/google.rpc.RetryInfo";
-//     result.SetPayload(url, info.SerializeAsCord());
-//     return result;
-//   }
-//
-class ABSL_MUST_USE_RESULT Status final {
- public:
-  // Constructors
-
-  // This default constructor creates an OK status with no message or payload.
-  // Avoid this constructor and prefer explicit construction of an OK status
-  // with `absl::OkStatus()`.
-  Status();
-
-  // Creates a status in the canonical error space with the specified
-  // `absl::StatusCode` and error message.  If `code == absl::StatusCode::kOk`,
-  // `msg` is ignored and an object identical to an OK status is constructed.
-  //
-  // The `msg` string must be in UTF-8. The implementation may complain (e.g.,
-  // by printing a warning) if it is not.
-  Status(absl::StatusCode code, absl::string_view msg);
-
-  Status(const Status&);
-  Status& operator=(const Status& x);
-
-  // Move operators
-
-  // The moved-from state is valid but unspecified.
-  Status(Status&&) noexcept;
-  Status& operator=(Status&&);
-
-  ~Status();
-
-  // Status::Update()
-  //
-  // Updates the existing status with `new_status` provided that `this->ok()`.
-  // If the existing status already contains a non-OK error, this update has no
-  // effect and preserves the current data. Note that this behavior may change
-  // in the future to augment a current non-ok status with additional
-  // information about `new_status`.
-  //
-  // `Update()` provides a convenient way of keeping track of the first error
-  // encountered.
-  //
-  // Example:
-  //   // Instead of "if (overall_status.ok()) overall_status = new_status"
-  //   overall_status.Update(new_status);
-  //
-  void Update(const Status& new_status);
-  void Update(Status&& new_status);
-
-  // Status::ok()
-  //
-  // Returns `true` if `this->ok()`. Prefer checking for an OK status using this
-  // member function.
-  ABSL_MUST_USE_RESULT bool ok() const;
-
-  // Status::code()
-  //
-  // Returns the canonical error code of type `absl::StatusCode` of this status.
-  absl::StatusCode code() const;
-
-  // Status::raw_code()
-  //
-  // Returns a raw (canonical) error code corresponding to the enum value of
-  // `google.rpc.Code` definitions within
-  // https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto.
-  // These values could be out of the range of canonical `absl::StatusCode`
-  // enum values.
-  //
-  // NOTE: This function should only be called when converting to an associated
-  // wire format. Use `Status::code()` for error handling.
-  int raw_code() const;
-
-  // Status::message()
-  //
-  // Returns the error message associated with this error code, if available.
-  // Note that this message rarely describes the error code.  It is not unusual
-  // for the error message to be the empty string. As a result, prefer
-  // `Status::ToString()` for debug logging.
-  absl::string_view message() const;
-
-  friend bool operator==(const Status&, const Status&);
-  friend bool operator!=(const Status&, const Status&);
-
-  // Status::ToString()
-  //
-  // Returns a combination of the error code name, the message and any
-  // associated payload messages. This string is designed simply to be human
-  // readable and its exact format should not be load bearing. Do not depend on
-  // the exact format of the result of `ToString()` which is subject to change.
-  //
-  // The printed code name and the message are generally substrings of the
-  // result, and the payloads to be printed use the status payload printer
-  // mechanism (which is internal).
-  std::string ToString() const;
-
-  // Status::IgnoreError()
-  //
-  // Ignores any errors. This method does nothing except potentially suppress
-  // complaints from any tools that are checking that errors are not dropped on
-  // the floor.
-  void IgnoreError() const;
-
-  // swap()
-  //
-  // Swap the contents of one status with another.
-  friend void swap(Status& a, Status& b);
-
-  //----------------------------------------------------------------------------
-  // Payload Management APIs
-  //----------------------------------------------------------------------------
-
-  // A payload may be attached to a status to provide additional context to an
-  // error that may not be satisifed by an existing `absl::StatusCode`.
-  // Typically, this payload serves one of several purposes:
-  //
-  //   * It may provide more fine-grained semantic information about the error
-  //     to facilitate actionable remedies.
-  //   * It may provide human-readable contexual information that is more
-  //     appropriate to display to an end user.
-  //
-  // A payload consists of a [key,value] pair, where the key is a string
-  // referring to a unique "type URL" and the value is an object of type
-  // `absl::Cord` to hold the contextual data.
-  //
-  // The "type URL" should be unique and follow the format of a URL
-  // (https://en.wikipedia.org/wiki/URL) and, ideally, provide some
-  // documentation or schema on how to interpret its associated data. For
-  // example, the default type URL for a protobuf message type is
-  // "type.googleapis.com/packagename.messagename". Other custom wire formats
-  // should define the format of type URL in a similar practice so as to
-  // minimize the chance of conflict between type URLs.
-  // Users should ensure that the type URL can be mapped to a concrete
-  // C++ type if they want to deserialize the payload and read it effectively.
-  //
-  // To attach a payload to a status object, call `Status::SetPayload()`,
-  // passing it the type URL and an `absl::Cord` of associated data. Similarly,
-  // to extract the payload from a status, call `Status::GetPayload()`. You
-  // may attach multiple payloads (with differing type URLs) to any given
-  // status object, provided that the status is currently exhibiting an error
-  // code (i.e. is not OK).
-
-  // Status::GetPayload()
-  //
-  // Gets the payload of a status given its unique `type_url` key, if present.
-  absl::optional<absl::Cord> GetPayload(absl::string_view type_url) const;
-
-  // Status::SetPayload()
-  //
-  // Sets the payload for a non-ok status using a `type_url` key, overwriting
-  // any existing payload for that `type_url`.
-  //
-  // NOTE: This function does nothing if the Status is ok.
-  void SetPayload(absl::string_view type_url, absl::Cord payload);
-
-  // Status::ErasePayload()
-  //
-  // Erases the payload corresponding to the `type_url` key.  Returns `true` if
-  // the payload was present.
-  bool ErasePayload(absl::string_view type_url);
-
-  // Status::ForEachPayload()
-  //
-  // Iterates over the stored payloads and calls the
-  // `visitor(type_key, payload)` callable for each one.
-  //
-  // NOTE: The order of calls to `visitor()` is not specified and may change at
-  // any time.
-  //
-  // NOTE: Any mutation on the same 'absl::Status' object during visitation is
-  // forbidden and could result in undefined behavior.
-  void ForEachPayload(
-      const std::function<void(absl::string_view, const absl::Cord&)>& visitor)
-      const;
-
- private:
-  friend Status CancelledError();
-
-  // Creates a status in the canonical error space with the specified
-  // code, and an empty error message.
-  explicit Status(absl::StatusCode code);
-
-  static void UnrefNonInlined(uintptr_t rep);
-  static void Ref(uintptr_t rep);
-  static void Unref(uintptr_t rep);
-
-  // REQUIRES: !ok()
-  // Ensures rep_ is not shared with any other Status.
-  void PrepareToModify();
-
-  const status_internal::Payloads* GetPayloads() const;
-  status_internal::Payloads* GetPayloads();
-
-  // Takes ownership of payload.
-  static uintptr_t NewRep(absl::StatusCode code, absl::string_view msg,
-                          std::unique_ptr<status_internal::Payloads> payload);
-  static bool EqualsSlow(const absl::Status& a, const absl::Status& b);
-
-  // MSVC 14.0 limitation requires the const.
-  static constexpr const char kMovedFromString[] =
-      "Status accessed after move.";
-
-  static const std::string* EmptyString();
-  static const std::string* MovedFromString();
-
-  // Returns whether rep contains an inlined representation.
-  // See rep_ for details.
-  static bool IsInlined(uintptr_t rep);
-
-  // Indicates whether this Status was the rhs of a move operation. See rep_
-  // for details.
-  static bool IsMovedFrom(uintptr_t rep);
-  static uintptr_t MovedFromRep();
-
-  // Convert between error::Code and the inlined uintptr_t representation used
-  // by rep_. See rep_ for details.
-  static uintptr_t CodeToInlinedRep(absl::StatusCode code);
-  static absl::StatusCode InlinedRepToCode(uintptr_t rep);
-
-  // Converts between StatusRep* and the external uintptr_t representation used
-  // by rep_. See rep_ for details.
-  static uintptr_t PointerToRep(status_internal::StatusRep* r);
-  static status_internal::StatusRep* RepToPointer(uintptr_t r);
-
-  // Returns string for non-ok Status.
-  std::string ToStringSlow() const;
-
-  // Status supports two different representations.
-  //  - When the low bit is off it is an inlined representation.
-  //    It uses the canonical error space, no message or payload.
-  //    The error code is (rep_ >> 2).
-  //    The (rep_ & 2) bit is the "moved from" indicator, used in IsMovedFrom().
-  //  - When the low bit is on it is an external representation.
-  //    In this case all the data comes from a heap allocated Rep object.
-  //    (rep_ - 1) is a status_internal::StatusRep* pointer to that structure.
-  uintptr_t rep_;
-};
-
-// OkStatus()
-//
-// Returns an OK status, equivalent to a default constructed instance. Prefer
-// usage of `absl::OkStatus()` when constructing such an OK status.
-Status OkStatus();
-
-// operator<<()
-//
-// Prints a human-readable representation of `x` to `os`.
-std::ostream& operator<<(std::ostream& os, const Status& x);
-
-// IsAborted()
-// IsAlreadyExists()
-// IsCancelled()
-// IsDataLoss()
-// IsDeadlineExceeded()
-// IsFailedPrecondition()
-// IsInternal()
-// IsInvalidArgument()
-// IsNotFound()
-// IsOutOfRange()
-// IsPermissionDenied()
-// IsResourceExhausted()
-// IsUnauthenticated()
-// IsUnavailable()
-// IsUnimplemented()
-// IsUnknown()
-//
-// These convenience functions return `true` if a given status matches the
-// `absl::StatusCode` error code of its associated function.
-ABSL_MUST_USE_RESULT bool IsAborted(const Status& status);
-ABSL_MUST_USE_RESULT bool IsAlreadyExists(const Status& status);
-ABSL_MUST_USE_RESULT bool IsCancelled(const Status& status);
-ABSL_MUST_USE_RESULT bool IsDataLoss(const Status& status);
-ABSL_MUST_USE_RESULT bool IsDeadlineExceeded(const Status& status);
-ABSL_MUST_USE_RESULT bool IsFailedPrecondition(const Status& status);
-ABSL_MUST_USE_RESULT bool IsInternal(const Status& status);
-ABSL_MUST_USE_RESULT bool IsInvalidArgument(const Status& status);
-ABSL_MUST_USE_RESULT bool IsNotFound(const Status& status);
-ABSL_MUST_USE_RESULT bool IsOutOfRange(const Status& status);
-ABSL_MUST_USE_RESULT bool IsPermissionDenied(const Status& status);
-ABSL_MUST_USE_RESULT bool IsResourceExhausted(const Status& status);
-ABSL_MUST_USE_RESULT bool IsUnauthenticated(const Status& status);
-ABSL_MUST_USE_RESULT bool IsUnavailable(const Status& status);
-ABSL_MUST_USE_RESULT bool IsUnimplemented(const Status& status);
-ABSL_MUST_USE_RESULT bool IsUnknown(const Status& status);
-
-// AbortedError()
-// AlreadyExistsError()
-// CancelledError()
-// DataLossError()
-// DeadlineExceededError()
-// FailedPreconditionError()
-// InternalError()
-// InvalidArgumentError()
-// NotFoundError()
-// OutOfRangeError()
-// PermissionDeniedError()
-// ResourceExhaustedError()
-// UnauthenticatedError()
-// UnavailableError()
-// UnimplementedError()
-// UnknownError()
-//
-// These convenience functions create an `absl::Status` object with an error
-// code as indicated by the associated function name, using the error message
-// passed in `message`.
-Status AbortedError(absl::string_view message);
-Status AlreadyExistsError(absl::string_view message);
-Status CancelledError(absl::string_view message);
-Status DataLossError(absl::string_view message);
-Status DeadlineExceededError(absl::string_view message);
-Status FailedPreconditionError(absl::string_view message);
-Status InternalError(absl::string_view message);
-Status InvalidArgumentError(absl::string_view message);
-Status NotFoundError(absl::string_view message);
-Status OutOfRangeError(absl::string_view message);
-Status PermissionDeniedError(absl::string_view message);
-Status ResourceExhaustedError(absl::string_view message);
-Status UnauthenticatedError(absl::string_view message);
-Status UnavailableError(absl::string_view message);
-Status UnimplementedError(absl::string_view message);
-Status UnknownError(absl::string_view message);
-
-//------------------------------------------------------------------------------
-// Implementation details follow
-//------------------------------------------------------------------------------
-
-inline Status::Status() : rep_(CodeToInlinedRep(absl::StatusCode::kOk)) {}
-
-inline Status::Status(absl::StatusCode code) : rep_(CodeToInlinedRep(code)) {}
-
-inline Status::Status(const Status& x) : rep_(x.rep_) { Ref(rep_); }
-
-inline Status& Status::operator=(const Status& x) {
-  uintptr_t old_rep = rep_;
-  if (x.rep_ != old_rep) {
-    Ref(x.rep_);
-    rep_ = x.rep_;
-    Unref(old_rep);
-  }
-  return *this;
-}
-
-inline Status::Status(Status&& x) noexcept : rep_(x.rep_) {
-  x.rep_ = MovedFromRep();
-}
-
-inline Status& Status::operator=(Status&& x) {
-  uintptr_t old_rep = rep_;
-  if (x.rep_ != old_rep) {
-    rep_ = x.rep_;
-    x.rep_ = MovedFromRep();
-    Unref(old_rep);
-  }
-  return *this;
-}
-
-inline void Status::Update(const Status& new_status) {
-  if (ok()) {
-    *this = new_status;
-  }
-}
-
-inline void Status::Update(Status&& new_status) {
-  if (ok()) {
-    *this = std::move(new_status);
-  }
-}
-
-inline Status::~Status() { Unref(rep_); }
-
-inline bool Status::ok() const {
-  return rep_ == CodeToInlinedRep(absl::StatusCode::kOk);
-}
-
-inline absl::string_view Status::message() const {
-  return !IsInlined(rep_)
-             ? RepToPointer(rep_)->message
-             : (IsMovedFrom(rep_) ? absl::string_view(kMovedFromString)
-                                  : absl::string_view());
-}
-
-inline bool operator==(const Status& lhs, const Status& rhs) {
-  return lhs.rep_ == rhs.rep_ || Status::EqualsSlow(lhs, rhs);
-}
-
-inline bool operator!=(const Status& lhs, const Status& rhs) {
-  return !(lhs == rhs);
-}
-
-inline std::string Status::ToString() const {
-  return ok() ? "OK" : ToStringSlow();
-}
-
-inline void Status::IgnoreError() const {
-  // no-op
-}
-
-inline void swap(absl::Status& a, absl::Status& b) {
-  using std::swap;
-  swap(a.rep_, b.rep_);
-}
-
-inline const status_internal::Payloads* Status::GetPayloads() const {
-  return IsInlined(rep_) ? nullptr : RepToPointer(rep_)->payloads.get();
-}
-
-inline status_internal::Payloads* Status::GetPayloads() {
-  return IsInlined(rep_) ? nullptr : RepToPointer(rep_)->payloads.get();
-}
-
-inline bool Status::IsInlined(uintptr_t rep) { return (rep & 1) == 0; }
-
-inline bool Status::IsMovedFrom(uintptr_t rep) {
-  return IsInlined(rep) && (rep & 2) != 0;
-}
-
-inline uintptr_t Status::MovedFromRep() {
-  return CodeToInlinedRep(absl::StatusCode::kInternal) | 2;
-}
-
-inline uintptr_t Status::CodeToInlinedRep(absl::StatusCode code) {
-  return static_cast<uintptr_t>(code) << 2;
-}
-
-inline absl::StatusCode Status::InlinedRepToCode(uintptr_t rep) {
-  assert(IsInlined(rep));
-  return static_cast<absl::StatusCode>(rep >> 2);
-}
-
-inline status_internal::StatusRep* Status::RepToPointer(uintptr_t rep) {
-  assert(!IsInlined(rep));
-  return reinterpret_cast<status_internal::StatusRep*>(rep - 1);
-}
-
-inline uintptr_t Status::PointerToRep(status_internal::StatusRep* rep) {
-  return reinterpret_cast<uintptr_t>(rep) + 1;
-}
-
-inline void Status::Ref(uintptr_t rep) {
-  if (!IsInlined(rep)) {
-    RepToPointer(rep)->ref.fetch_add(1, std::memory_order_relaxed);
-  }
-}
-
-inline void Status::Unref(uintptr_t rep) {
-  if (!IsInlined(rep)) {
-    UnrefNonInlined(rep);
-  }
-}
-
-inline Status OkStatus() { return Status(); }
-
-// Creates a `Status` object with the `absl::StatusCode::kCancelled` error code
-// and an empty message. It is provided only for efficiency, given that
-// message-less kCancelled errors are common in the infrastructure.
-inline Status CancelledError() { return Status(absl::StatusCode::kCancelled); }
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STATUS_STATUS_H_
diff --git a/third_party/abseil/absl/status/status_payload_printer.cc b/third_party/abseil/absl/status/status_payload_printer.cc
deleted file mode 100644
index a47aea1..0000000
--- a/third_party/abseil/absl/status/status_payload_printer.cc
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include "absl/status/status_payload_printer.h"
-
-#include <atomic>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/atomic_hook.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace status_internal {
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-static absl::base_internal::AtomicHook<StatusPayloadPrinter> storage;
-
-void SetStatusPayloadPrinter(StatusPayloadPrinter printer) {
-  storage.Store(printer);
-}
-
-StatusPayloadPrinter GetStatusPayloadPrinter() {
-  return storage.Load();
-}
-
-}  // namespace status_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/status/status_payload_printer.h b/third_party/abseil/absl/status/status_payload_printer.h
deleted file mode 100644
index 5e0937f..0000000
--- a/third_party/abseil/absl/status/status_payload_printer.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#ifndef ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
-#define ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
-
-#include <string>
-
-#include "absl/strings/cord.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace status_internal {
-
-// By default, `Status::ToString` and `operator<<(Status)` print a payload by
-// dumping the type URL and the raw bytes. To help debugging, we provide an
-// extension point, which is a global printer function that can be set by users
-// to specify how to print payloads. The function takes the type URL and the
-// payload as input, and should return a valid human-readable string on success
-// or `absl::nullopt` on failure (in which case it falls back to the default
-// approach of printing the raw bytes).
-// NOTE: This is an internal API and the design is subject to change in the
-// future in a non-backward-compatible way. Since it's only meant for debugging
-// purpose, you should not rely on it in any critical logic.
-using StatusPayloadPrinter = absl::optional<std::string> (*)(absl::string_view,
-                                                             const absl::Cord&);
-
-// Sets the global payload printer. Only one printer should be set per process.
-// If multiple printers are set, it's undefined which one will be used.
-void SetStatusPayloadPrinter(StatusPayloadPrinter);
-
-// Returns the global payload printer if previously set, otherwise `nullptr`.
-StatusPayloadPrinter GetStatusPayloadPrinter();
-
-}  // namespace status_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
diff --git a/third_party/abseil/absl/status/status_test.cc b/third_party/abseil/absl/status/status_test.cc
deleted file mode 100644
index 25333fa..0000000
--- a/third_party/abseil/absl/status/status_test.cc
+++ /dev/null
@@ -1,464 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/status/status.h"
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-using ::testing::Eq;
-using ::testing::HasSubstr;
-using ::testing::Optional;
-using ::testing::UnorderedElementsAreArray;
-
-TEST(StatusCode, InsertionOperator) {
-  const absl::StatusCode code = absl::StatusCode::kUnknown;
-  std::ostringstream oss;
-  oss << code;
-  EXPECT_EQ(oss.str(), absl::StatusCodeToString(code));
-}
-
-// This structure holds the details for testing a single error code,
-// its creator, and its classifier.
-struct ErrorTest {
-  absl::StatusCode code;
-  using Creator = absl::Status (*)(absl::string_view);
-  using Classifier = bool (*)(const absl::Status&);
-  Creator creator;
-  Classifier classifier;
-};
-
-constexpr ErrorTest kErrorTests[]{
-    {absl::StatusCode::kCancelled, absl::CancelledError, absl::IsCancelled},
-    {absl::StatusCode::kUnknown, absl::UnknownError, absl::IsUnknown},
-    {absl::StatusCode::kInvalidArgument, absl::InvalidArgumentError,
-     absl::IsInvalidArgument},
-    {absl::StatusCode::kDeadlineExceeded, absl::DeadlineExceededError,
-     absl::IsDeadlineExceeded},
-    {absl::StatusCode::kNotFound, absl::NotFoundError, absl::IsNotFound},
-    {absl::StatusCode::kAlreadyExists, absl::AlreadyExistsError,
-     absl::IsAlreadyExists},
-    {absl::StatusCode::kPermissionDenied, absl::PermissionDeniedError,
-     absl::IsPermissionDenied},
-    {absl::StatusCode::kResourceExhausted, absl::ResourceExhaustedError,
-     absl::IsResourceExhausted},
-    {absl::StatusCode::kFailedPrecondition, absl::FailedPreconditionError,
-     absl::IsFailedPrecondition},
-    {absl::StatusCode::kAborted, absl::AbortedError, absl::IsAborted},
-    {absl::StatusCode::kOutOfRange, absl::OutOfRangeError, absl::IsOutOfRange},
-    {absl::StatusCode::kUnimplemented, absl::UnimplementedError,
-     absl::IsUnimplemented},
-    {absl::StatusCode::kInternal, absl::InternalError, absl::IsInternal},
-    {absl::StatusCode::kUnavailable, absl::UnavailableError,
-     absl::IsUnavailable},
-    {absl::StatusCode::kDataLoss, absl::DataLossError, absl::IsDataLoss},
-    {absl::StatusCode::kUnauthenticated, absl::UnauthenticatedError,
-     absl::IsUnauthenticated},
-};
-
-TEST(Status, CreateAndClassify) {
-  for (const auto& test : kErrorTests) {
-    SCOPED_TRACE(absl::StatusCodeToString(test.code));
-
-    // Ensure that the creator does, in fact, create status objects with the
-    // expected error code and message.
-    std::string message =
-        absl::StrCat("error code ", test.code, " test message");
-    absl::Status status = test.creator(message);
-    EXPECT_EQ(test.code, status.code());
-    EXPECT_EQ(message, status.message());
-
-    // Ensure that the classifier returns true for a status produced by the
-    // creator.
-    EXPECT_TRUE(test.classifier(status));
-
-    // Ensure that the classifier returns false for status with a different
-    // code.
-    for (const auto& other : kErrorTests) {
-      if (other.code != test.code) {
-        EXPECT_FALSE(test.classifier(absl::Status(other.code, "")))
-            << " other.code = " << other.code;
-      }
-    }
-  }
-}
-
-TEST(Status, DefaultConstructor) {
-  absl::Status status;
-  EXPECT_TRUE(status.ok());
-  EXPECT_EQ(absl::StatusCode::kOk, status.code());
-  EXPECT_EQ("", status.message());
-}
-
-TEST(Status, OkStatus) {
-  absl::Status status = absl::OkStatus();
-  EXPECT_TRUE(status.ok());
-  EXPECT_EQ(absl::StatusCode::kOk, status.code());
-  EXPECT_EQ("", status.message());
-}
-
-TEST(Status, ConstructorWithCodeMessage) {
-  {
-    absl::Status status(absl::StatusCode::kCancelled, "");
-    EXPECT_FALSE(status.ok());
-    EXPECT_EQ(absl::StatusCode::kCancelled, status.code());
-    EXPECT_EQ("", status.message());
-  }
-  {
-    absl::Status status(absl::StatusCode::kInternal, "message");
-    EXPECT_FALSE(status.ok());
-    EXPECT_EQ(absl::StatusCode::kInternal, status.code());
-    EXPECT_EQ("message", status.message());
-  }
-}
-
-TEST(Status, ConstructOutOfRangeCode) {
-  const int kRawCode = 9999;
-  absl::Status status(static_cast<absl::StatusCode>(kRawCode), "");
-  EXPECT_EQ(absl::StatusCode::kUnknown, status.code());
-  EXPECT_EQ(kRawCode, status.raw_code());
-}
-
-constexpr char kUrl1[] = "url.payload.1";
-constexpr char kUrl2[] = "url.payload.2";
-constexpr char kUrl3[] = "url.payload.3";
-constexpr char kUrl4[] = "url.payload.xx";
-
-constexpr char kPayload1[] = "aaaaa";
-constexpr char kPayload2[] = "bbbbb";
-constexpr char kPayload3[] = "ccccc";
-
-using PayloadsVec = std::vector<std::pair<std::string, absl::Cord>>;
-
-TEST(Status, TestGetSetPayload) {
-  absl::Status ok_status = absl::OkStatus();
-  ok_status.SetPayload(kUrl1, absl::Cord(kPayload1));
-  ok_status.SetPayload(kUrl2, absl::Cord(kPayload2));
-
-  EXPECT_FALSE(ok_status.GetPayload(kUrl1));
-  EXPECT_FALSE(ok_status.GetPayload(kUrl2));
-
-  absl::Status bad_status(absl::StatusCode::kInternal, "fail");
-  bad_status.SetPayload(kUrl1, absl::Cord(kPayload1));
-  bad_status.SetPayload(kUrl2, absl::Cord(kPayload2));
-
-  EXPECT_THAT(bad_status.GetPayload(kUrl1), Optional(Eq(kPayload1)));
-  EXPECT_THAT(bad_status.GetPayload(kUrl2), Optional(Eq(kPayload2)));
-
-  EXPECT_FALSE(bad_status.GetPayload(kUrl3));
-
-  bad_status.SetPayload(kUrl1, absl::Cord(kPayload3));
-  EXPECT_THAT(bad_status.GetPayload(kUrl1), Optional(Eq(kPayload3)));
-
-  // Testing dynamically generated type_url
-  bad_status.SetPayload(absl::StrCat(kUrl1, ".1"), absl::Cord(kPayload1));
-  EXPECT_THAT(bad_status.GetPayload(absl::StrCat(kUrl1, ".1")),
-              Optional(Eq(kPayload1)));
-}
-
-TEST(Status, TestErasePayload) {
-  absl::Status bad_status(absl::StatusCode::kInternal, "fail");
-  bad_status.SetPayload(kUrl1, absl::Cord(kPayload1));
-  bad_status.SetPayload(kUrl2, absl::Cord(kPayload2));
-  bad_status.SetPayload(kUrl3, absl::Cord(kPayload3));
-
-  EXPECT_FALSE(bad_status.ErasePayload(kUrl4));
-
-  EXPECT_TRUE(bad_status.GetPayload(kUrl2));
-  EXPECT_TRUE(bad_status.ErasePayload(kUrl2));
-  EXPECT_FALSE(bad_status.GetPayload(kUrl2));
-  EXPECT_FALSE(bad_status.ErasePayload(kUrl2));
-
-  EXPECT_TRUE(bad_status.ErasePayload(kUrl1));
-  EXPECT_TRUE(bad_status.ErasePayload(kUrl3));
-
-  bad_status.SetPayload(kUrl1, absl::Cord(kPayload1));
-  EXPECT_TRUE(bad_status.ErasePayload(kUrl1));
-}
-
-TEST(Status, TestComparePayloads) {
-  absl::Status bad_status1(absl::StatusCode::kInternal, "fail");
-  bad_status1.SetPayload(kUrl1, absl::Cord(kPayload1));
-  bad_status1.SetPayload(kUrl2, absl::Cord(kPayload2));
-  bad_status1.SetPayload(kUrl3, absl::Cord(kPayload3));
-
-  absl::Status bad_status2(absl::StatusCode::kInternal, "fail");
-  bad_status2.SetPayload(kUrl2, absl::Cord(kPayload2));
-  bad_status2.SetPayload(kUrl3, absl::Cord(kPayload3));
-  bad_status2.SetPayload(kUrl1, absl::Cord(kPayload1));
-
-  EXPECT_EQ(bad_status1, bad_status2);
-}
-
-TEST(Status, TestComparePayloadsAfterErase) {
-  absl::Status payload_status(absl::StatusCode::kInternal, "");
-  payload_status.SetPayload(kUrl1, absl::Cord(kPayload1));
-  payload_status.SetPayload(kUrl2, absl::Cord(kPayload2));
-
-  absl::Status empty_status(absl::StatusCode::kInternal, "");
-
-  // Different payloads, not equal
-  EXPECT_NE(payload_status, empty_status);
-  EXPECT_TRUE(payload_status.ErasePayload(kUrl1));
-
-  // Still Different payloads, still not equal.
-  EXPECT_NE(payload_status, empty_status);
-  EXPECT_TRUE(payload_status.ErasePayload(kUrl2));
-
-  // Both empty payloads, should be equal
-  EXPECT_EQ(payload_status, empty_status);
-}
-
-PayloadsVec AllVisitedPayloads(const absl::Status& s) {
-  PayloadsVec result;
-
-  s.ForEachPayload([&](absl::string_view type_url, const absl::Cord& payload) {
-    result.push_back(std::make_pair(std::string(type_url), payload));
-  });
-
-  return result;
-}
-
-TEST(Status, TestForEachPayload) {
-  absl::Status bad_status(absl::StatusCode::kInternal, "fail");
-  bad_status.SetPayload(kUrl1, absl::Cord(kPayload1));
-  bad_status.SetPayload(kUrl2, absl::Cord(kPayload2));
-  bad_status.SetPayload(kUrl3, absl::Cord(kPayload3));
-
-  int count = 0;
-
-  bad_status.ForEachPayload(
-      [&count](absl::string_view, const absl::Cord&) { ++count; });
-
-  EXPECT_EQ(count, 3);
-
-  PayloadsVec expected_payloads = {{kUrl1, absl::Cord(kPayload1)},
-                                   {kUrl2, absl::Cord(kPayload2)},
-                                   {kUrl3, absl::Cord(kPayload3)}};
-
-  // Test that we visit all the payloads in the status.
-  PayloadsVec visited_payloads = AllVisitedPayloads(bad_status);
-  EXPECT_THAT(visited_payloads, UnorderedElementsAreArray(expected_payloads));
-
-  // Test that visitation order is not consistent between run.
-  std::vector<absl::Status> scratch;
-  while (true) {
-    scratch.emplace_back(absl::StatusCode::kInternal, "fail");
-
-    scratch.back().SetPayload(kUrl1, absl::Cord(kPayload1));
-    scratch.back().SetPayload(kUrl2, absl::Cord(kPayload2));
-    scratch.back().SetPayload(kUrl3, absl::Cord(kPayload3));
-
-    if (AllVisitedPayloads(scratch.back()) != visited_payloads) {
-      break;
-    }
-  }
-}
-
-TEST(Status, ToString) {
-  absl::Status s(absl::StatusCode::kInternal, "fail");
-  EXPECT_EQ("INTERNAL: fail", s.ToString());
-  s.SetPayload("foo", absl::Cord("bar"));
-  EXPECT_EQ("INTERNAL: fail [foo='bar']", s.ToString());
-  s.SetPayload("bar", absl::Cord("\377"));
-  EXPECT_THAT(s.ToString(),
-              AllOf(HasSubstr("INTERNAL: fail"), HasSubstr("[foo='bar']"),
-                    HasSubstr("[bar='\\xff']")));
-}
-
-absl::Status EraseAndReturn(const absl::Status& base) {
-  absl::Status copy = base;
-  EXPECT_TRUE(copy.ErasePayload(kUrl1));
-  return copy;
-}
-
-TEST(Status, CopyOnWriteForErasePayload) {
-  {
-    absl::Status base(absl::StatusCode::kInvalidArgument, "fail");
-    base.SetPayload(kUrl1, absl::Cord(kPayload1));
-    EXPECT_TRUE(base.GetPayload(kUrl1).has_value());
-    absl::Status copy = EraseAndReturn(base);
-    EXPECT_TRUE(base.GetPayload(kUrl1).has_value());
-    EXPECT_FALSE(copy.GetPayload(kUrl1).has_value());
-  }
-  {
-    absl::Status base(absl::StatusCode::kInvalidArgument, "fail");
-    base.SetPayload(kUrl1, absl::Cord(kPayload1));
-    absl::Status copy = base;
-
-    EXPECT_TRUE(base.GetPayload(kUrl1).has_value());
-    EXPECT_TRUE(copy.GetPayload(kUrl1).has_value());
-
-    EXPECT_TRUE(base.ErasePayload(kUrl1));
-
-    EXPECT_FALSE(base.GetPayload(kUrl1).has_value());
-    EXPECT_TRUE(copy.GetPayload(kUrl1).has_value());
-  }
-}
-
-TEST(Status, CopyConstructor) {
-  {
-    absl::Status status;
-    absl::Status copy(status);
-    EXPECT_EQ(copy, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    absl::Status copy(status);
-    EXPECT_EQ(copy, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    status.SetPayload(kUrl1, absl::Cord(kPayload1));
-    absl::Status copy(status);
-    EXPECT_EQ(copy, status);
-  }
-}
-
-TEST(Status, CopyAssignment) {
-  absl::Status assignee;
-  {
-    absl::Status status;
-    assignee = status;
-    EXPECT_EQ(assignee, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    assignee = status;
-    EXPECT_EQ(assignee, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    status.SetPayload(kUrl1, absl::Cord(kPayload1));
-    assignee = status;
-    EXPECT_EQ(assignee, status);
-  }
-}
-
-TEST(Status, CopyAssignmentIsNotRef) {
-  const absl::Status status_orig(absl::StatusCode::kInvalidArgument, "message");
-  absl::Status status_copy = status_orig;
-  EXPECT_EQ(status_orig, status_copy);
-  status_copy.SetPayload(kUrl1, absl::Cord(kPayload1));
-  EXPECT_NE(status_orig, status_copy);
-}
-
-TEST(Status, MoveConstructor) {
-  {
-    absl::Status status;
-    absl::Status copy(absl::Status{});
-    EXPECT_EQ(copy, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    absl::Status copy(
-        absl::Status(absl::StatusCode::kInvalidArgument, "message"));
-    EXPECT_EQ(copy, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    status.SetPayload(kUrl1, absl::Cord(kPayload1));
-    absl::Status copy1(status);
-    absl::Status copy2(std::move(status));
-    EXPECT_EQ(copy1, copy2);
-  }
-}
-
-TEST(Status, MoveAssignment) {
-  absl::Status assignee;
-  {
-    absl::Status status;
-    assignee = absl::Status();
-    EXPECT_EQ(assignee, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    assignee = absl::Status(absl::StatusCode::kInvalidArgument, "message");
-    EXPECT_EQ(assignee, status);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    status.SetPayload(kUrl1, absl::Cord(kPayload1));
-    absl::Status copy(status);
-    assignee = std::move(status);
-    EXPECT_EQ(assignee, copy);
-  }
-  {
-    absl::Status status(absl::StatusCode::kInvalidArgument, "message");
-    absl::Status copy(status);
-    status = static_cast<absl::Status&&>(status);
-    EXPECT_EQ(status, copy);
-  }
-}
-
-TEST(Status, Update) {
-  absl::Status s;
-  s.Update(absl::OkStatus());
-  EXPECT_TRUE(s.ok());
-  const absl::Status a(absl::StatusCode::kCancelled, "message");
-  s.Update(a);
-  EXPECT_EQ(s, a);
-  const absl::Status b(absl::StatusCode::kInternal, "other message");
-  s.Update(b);
-  EXPECT_EQ(s, a);
-  s.Update(absl::OkStatus());
-  EXPECT_EQ(s, a);
-  EXPECT_FALSE(s.ok());
-}
-
-TEST(Status, Equality) {
-  absl::Status ok;
-  absl::Status no_payload = absl::CancelledError("no payload");
-  absl::Status one_payload = absl::InvalidArgumentError("one payload");
-  one_payload.SetPayload(kUrl1, absl::Cord(kPayload1));
-  absl::Status two_payloads = one_payload;
-  two_payloads.SetPayload(kUrl2, absl::Cord(kPayload2));
-  const std::array<absl::Status, 4> status_arr = {ok, no_payload, one_payload,
-                                                  two_payloads};
-  for (int i = 0; i < status_arr.size(); i++) {
-    for (int j = 0; j < status_arr.size(); j++) {
-      if (i == j) {
-        EXPECT_TRUE(status_arr[i] == status_arr[j]);
-        EXPECT_FALSE(status_arr[i] != status_arr[j]);
-      } else {
-        EXPECT_TRUE(status_arr[i] != status_arr[j]);
-        EXPECT_FALSE(status_arr[i] == status_arr[j]);
-      }
-    }
-  }
-}
-
-TEST(Status, Swap) {
-  auto test_swap = [](const absl::Status& s1, const absl::Status& s2) {
-    absl::Status copy1 = s1, copy2 = s2;
-    swap(copy1, copy2);
-    EXPECT_EQ(copy1, s2);
-    EXPECT_EQ(copy2, s1);
-  };
-  const absl::Status ok;
-  const absl::Status no_payload(absl::StatusCode::kAlreadyExists, "no payload");
-  absl::Status with_payload(absl::StatusCode::kInternal, "with payload");
-  with_payload.SetPayload(kUrl1, absl::Cord(kPayload1));
-  test_swap(ok, no_payload);
-  test_swap(no_payload, ok);
-  test_swap(ok, with_payload);
-  test_swap(with_payload, ok);
-  test_swap(no_payload, with_payload);
-  test_swap(with_payload, no_payload);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/status/statusor.cc b/third_party/abseil/absl/status/statusor.cc
deleted file mode 100644
index b954b45..0000000
--- a/third_party/abseil/absl/status/statusor.cc
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include "absl/status/statusor.h"
-
-#include <cstdlib>
-#include <utility>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/status/status.h"
-#include "absl/strings/str_cat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-BadStatusOrAccess::BadStatusOrAccess(absl::Status status)
-    : status_(std::move(status)) {}
-
-BadStatusOrAccess::~BadStatusOrAccess() = default;
-const char* BadStatusOrAccess::what() const noexcept {
-  return "Bad StatusOr access";
-}
-
-const absl::Status& BadStatusOrAccess::status() const { return status_; }
-
-namespace internal_statusor {
-
-void Helper::HandleInvalidStatusCtorArg(absl::Status* status) {
-  const char* kMessage =
-      "An OK status is not a valid constructor argument to StatusOr<T>";
-#ifdef NDEBUG
-  ABSL_INTERNAL_LOG(ERROR, kMessage);
-#else
-  ABSL_INTERNAL_LOG(FATAL, kMessage);
-#endif
-  // In optimized builds, we will fall back to InternalError.
-  *status = absl::InternalError(kMessage);
-}
-
-void Helper::Crash(const absl::Status& status) {
-  ABSL_INTERNAL_LOG(
-      FATAL,
-      absl::StrCat("Attempting to fetch value instead of handling error ",
-                   status.ToString()));
-}
-
-void ThrowBadStatusOrAccess(absl::Status status) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  throw absl::BadStatusOrAccess(std::move(status));
-#else
-  ABSL_INTERNAL_LOG(
-      FATAL,
-      absl::StrCat("Attempting to fetch value instead of handling error ",
-                   status.ToString()));
-  std::abort();
-#endif
-}
-
-}  // namespace internal_statusor
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/status/statusor.h b/third_party/abseil/absl/status/statusor.h
deleted file mode 100644
index 469d486..0000000
--- a/third_party/abseil/absl/status/statusor.h
+++ /dev/null
@@ -1,760 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: statusor.h
-// -----------------------------------------------------------------------------
-//
-// An `absl::StatusOr<T>` represents a union of an `absl::Status` object
-// and an object of type `T`. The `absl::StatusOr<T>` will either contain an
-// object of type `T` (indicating a successful operation), or an error (of type
-// `absl::Status`) explaining why such a value is not present.
-//
-// In general, check the success of an operation returning an
-// `absl::StatusOr<T>` like you would an `absl::Status` by using the `ok()`
-// member function.
-//
-// Example:
-//
-//   StatusOr<Foo> result = Calculation();
-//   if (result.ok()) {
-//     result->DoSomethingCool();
-//   } else {
-//     LOG(ERROR) << result.status();
-//   }
-#ifndef ABSL_STATUS_STATUSOR_H_
-#define ABSL_STATUS_STATUSOR_H_
-
-#include <exception>
-#include <initializer_list>
-#include <new>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/attributes.h"
-#include "absl/meta/type_traits.h"
-#include "absl/status/internal/statusor_internal.h"
-#include "absl/status/status.h"
-#include "absl/types/variant.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// BadStatusOrAccess
-//
-// This class defines the type of object to throw (if exceptions are enabled),
-// when accessing the value of an `absl::StatusOr<T>` object that does not
-// contain a value. This behavior is analogous to that of
-// `std::bad_optional_access` in the case of accessing an invalid
-// `std::optional` value.
-//
-// Example:
-//
-// try {
-//   absl::StatusOr<int> v = FetchInt();
-//   DoWork(v.value());  // Accessing value() when not "OK" may throw
-// } catch (absl::BadStatusOrAccess& ex) {
-//   LOG(ERROR) << ex.status();
-// }
-class BadStatusOrAccess : public std::exception {
- public:
-  explicit BadStatusOrAccess(absl::Status status);
-  ~BadStatusOrAccess() override;
-
-  // BadStatusOrAccess::what()
-  //
-  // Returns the associated explanatory string of the `absl::StatusOr<T>`
-  // object's error code. This function only returns the string literal "Bad
-  // StatusOr Access" for cases when evaluating general exceptions.
-  //
-  // The pointer of this string is guaranteed to be valid until any non-const
-  // function is invoked on the exception object.
-  const char* what() const noexcept override;
-
-  // BadStatusOrAccess::status()
-  //
-  // Returns the associated `absl::Status` of the `absl::StatusOr<T>` object's
-  // error.
-  const absl::Status& status() const;
-
- private:
-  absl::Status status_;
-};
-
-// Returned StatusOr objects may not be ignored.
-template <typename T>
-class ABSL_MUST_USE_RESULT StatusOr;
-
-// absl::StatusOr<T>
-//
-// The `absl::StatusOr<T>` class template is a union of an `absl::Status` object
-// and an object of type `T`. The `absl::StatusOr<T>` models an object that is
-// either a usable object, or an error (of type `absl::Status`) explaining why
-// such an object is not present. An `absl::StatusOr<T>` is typically the return
-// value of a function which may fail.
-//
-// An `absl::StatusOr<T>` can never hold an "OK" status (an
-// `absl::StatusCode::kOk` value); instead, the presence of an object of type
-// `T` indicates success. Instead of checking for a `kOk` value, use the
-// `absl::StatusOr<T>::ok()` member function. (It is for this reason, and code
-// readability, that using the `ok()` function is preferred for `absl::Status`
-// as well.)
-//
-// Example:
-//
-//   StatusOr<Foo> result = DoBigCalculationThatCouldFail();
-//   if (result.ok()) {
-//     result->DoSomethingCool();
-//   } else {
-//     LOG(ERROR) << result.status();
-//   }
-//
-// Accessing the object held by an `absl::StatusOr<T>` should be performed via
-// `operator*` or `operator->`, after a call to `ok()` confirms that the
-// `absl::StatusOr<T>` holds an object of type `T`:
-//
-// Example:
-//
-//   absl::StatusOr<int> i = GetCount();
-//   if (i.ok()) {
-//     updated_total += *i
-//   }
-//
-// NOTE: using `absl::StatusOr<T>::value()` when no valid value is present will
-// throw an exception if exceptions are enabled or terminate the process when
-// execeptions are not enabled.
-//
-// Example:
-//
-//   StatusOr<Foo> result = DoBigCalculationThatCouldFail();
-//   const Foo& foo = result.value();    // Crash/exception if no value present
-//   foo.DoSomethingCool();
-//
-// A `absl::StatusOr<T*>` can be constructed from a null pointer like any other
-// pointer value, and the result will be that `ok()` returns `true` and
-// `value()` returns `nullptr`. Checking the value of pointer in an
-// `absl::StatusOr<T>` generally requires a bit more care, to ensure both that a
-// value is present and that value is not null:
-//
-//  StatusOr<std::unique_ptr<Foo>> result = FooFactory::MakeNewFoo(arg);
-//  if (!result.ok()) {
-//    LOG(ERROR) << result.status();
-//  } else if (*result == nullptr) {
-//    LOG(ERROR) << "Unexpected null pointer";
-//  } else {
-//    (*result)->DoSomethingCool();
-//  }
-//
-// Example factory implementation returning StatusOr<T>:
-//
-//  StatusOr<Foo> FooFactory::MakeFoo(int arg) {
-//    if (arg <= 0) {
-//      return absl::Status(absl::StatusCode::kInvalidArgument,
-//                          "Arg must be positive");
-//    }
-//    return Foo(arg);
-//  }
-template <typename T>
-class StatusOr : private internal_statusor::StatusOrData<T>,
-                 private internal_statusor::CopyCtorBase<T>,
-                 private internal_statusor::MoveCtorBase<T>,
-                 private internal_statusor::CopyAssignBase<T>,
-                 private internal_statusor::MoveAssignBase<T> {
-  template <typename U>
-  friend class StatusOr;
-
-  typedef internal_statusor::StatusOrData<T> Base;
-
- public:
-  // StatusOr<T>::value_type
-  //
-  // This instance data provides a generic `value_type` member for use within
-  // generic programming. This usage is analogous to that of
-  // `optional::value_type` in the case of `std::optional`.
-  typedef T value_type;
-
-  // Constructors
-
-  // Constructs a new `absl::StatusOr` with an `absl::StatusCode::kUnknown`
-  // status. This constructor is marked 'explicit' to prevent usages in return
-  // values such as 'return {};', under the misconception that
-  // `absl::StatusOr<std::vector<int>>` will be initialized with an empty
-  // vector, instead of an `absl::StatusCode::kUnknown` error code.
-  explicit StatusOr();
-
-  // `StatusOr<T>` is copy constructible if `T` is copy constructible.
-  StatusOr(const StatusOr&) = default;
-  // `StatusOr<T>` is copy assignable if `T` is copy constructible and copy
-  // assignable.
-  StatusOr& operator=(const StatusOr&) = default;
-
-  // `StatusOr<T>` is move constructible if `T` is move constructible.
-  StatusOr(StatusOr&&) = default;
-  // `StatusOr<T>` is moveAssignable if `T` is move constructible and move
-  // assignable.
-  StatusOr& operator=(StatusOr&&) = default;
-
-  // Converting Constructors
-
-  // Constructs a new `absl::StatusOr<T>` from an `absl::StatusOr<U>`, when `T`
-  // is constructible from `U`. To avoid ambiguity, these constructors are
-  // disabled if `T` is also constructible from `StatusOr<U>.`. This constructor
-  // is explicit if and only if the corresponding construction of `T` from `U`
-  // is explicit. (This constructor inherits its explicitness from the
-  // underlying constructor.)
-  template <
-      typename U,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>,
-              std::is_constructible<T, const U&>,
-              std::is_convertible<const U&, T>,
-              absl::negation<
-                  internal_statusor::IsConstructibleOrConvertibleFromStatusOr<
-                      T, U>>>::value,
-          int> = 0>
-  StatusOr(const StatusOr<U>& other)  // NOLINT
-      : Base(static_cast<const typename StatusOr<U>::Base&>(other)) {}
-  template <
-      typename U,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>,
-              std::is_constructible<T, const U&>,
-              absl::negation<std::is_convertible<const U&, T>>,
-              absl::negation<
-                  internal_statusor::IsConstructibleOrConvertibleFromStatusOr<
-                      T, U>>>::value,
-          int> = 0>
-  explicit StatusOr(const StatusOr<U>& other)
-      : Base(static_cast<const typename StatusOr<U>::Base&>(other)) {}
-
-  template <
-      typename U,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>, std::is_constructible<T, U&&>,
-              std::is_convertible<U&&, T>,
-              absl::negation<
-                  internal_statusor::IsConstructibleOrConvertibleFromStatusOr<
-                      T, U>>>::value,
-          int> = 0>
-  StatusOr(StatusOr<U>&& other)  // NOLINT
-      : Base(static_cast<typename StatusOr<U>::Base&&>(other)) {}
-  template <
-      typename U,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>, std::is_constructible<T, U&&>,
-              absl::negation<std::is_convertible<U&&, T>>,
-              absl::negation<
-                  internal_statusor::IsConstructibleOrConvertibleFromStatusOr<
-                      T, U>>>::value,
-          int> = 0>
-  explicit StatusOr(StatusOr<U>&& other)
-      : Base(static_cast<typename StatusOr<U>::Base&&>(other)) {}
-
-  // Converting Assignment Operators
-
-  // Creates an `absl::StatusOr<T>` through assignment from an
-  // `absl::StatusOr<U>` when:
-  //
-  //   * Both `absl::StatusOr<T>` and `absl::StatusOr<U>` are OK by assigning
-  //     `U` to `T` directly.
-  //   * `absl::StatusOr<T>` is OK and `absl::StatusOr<U>` contains an error
-  //      code by destroying `absl::StatusOr<T>`'s value and assigning from
-  //      `absl::StatusOr<U>'
-  //   * `absl::StatusOr<T>` contains an error code and `absl::StatusOr<U>` is
-  //      OK by directly initializing `T` from `U`.
-  //   * Both `absl::StatusOr<T>` and `absl::StatusOr<U>` contain an error
-  //     code by assigning the `Status` in `absl::StatusOr<U>` to
-  //     `absl::StatusOr<T>`
-  //
-  // These overloads only apply if `absl::StatusOr<T>` is constructible and
-  // assignable from `absl::StatusOr<U>` and `StatusOr<T>` cannot be directly
-  // assigned from `StatusOr<U>`.
-  template <
-      typename U,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>,
-              std::is_constructible<T, const U&>,
-              std::is_assignable<T, const U&>,
-              absl::negation<
-                  internal_statusor::
-                      IsConstructibleOrConvertibleOrAssignableFromStatusOr<
-                          T, U>>>::value,
-          int> = 0>
-  StatusOr& operator=(const StatusOr<U>& other) {
-    this->Assign(other);
-    return *this;
-  }
-  template <
-      typename U,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>, std::is_constructible<T, U&&>,
-              std::is_assignable<T, U&&>,
-              absl::negation<
-                  internal_statusor::
-                      IsConstructibleOrConvertibleOrAssignableFromStatusOr<
-                          T, U>>>::value,
-          int> = 0>
-  StatusOr& operator=(StatusOr<U>&& other) {
-    this->Assign(std::move(other));
-    return *this;
-  }
-
-  // Constructs a new `absl::StatusOr<T>` with a non-ok status. After calling
-  // this constructor, `this->ok()` will be `false` and calls to `value()` will
-  // crash, or produce an exception if exceptions are enabled.
-  //
-  // The constructor also takes any type `U` that is convertible to
-  // `absl::Status`. This constructor is explicit if an only if `U` is not of
-  // type `absl::Status` and the conversion from `U` to `Status` is explicit.
-  //
-  // REQUIRES: !Status(std::forward<U>(v)).ok(). This requirement is DCHECKed.
-  // In optimized builds, passing absl::OkStatus() here will have the effect
-  // of passing absl::StatusCode::kInternal as a fallback.
-  template <
-      typename U = absl::Status,
-      absl::enable_if_t<
-          absl::conjunction<
-              std::is_convertible<U&&, absl::Status>,
-              std::is_constructible<absl::Status, U&&>,
-              absl::negation<std::is_same<absl::decay_t<U>, absl::StatusOr<T>>>,
-              absl::negation<std::is_same<absl::decay_t<U>, T>>,
-              absl::negation<std::is_same<absl::decay_t<U>, absl::in_place_t>>,
-              absl::negation<internal_statusor::HasConversionOperatorToStatusOr<
-                  T, U&&>>>::value,
-          int> = 0>
-  StatusOr(U&& v) : Base(std::forward<U>(v)) {}
-
-  template <
-      typename U = absl::Status,
-      absl::enable_if_t<
-          absl::conjunction<
-              absl::negation<std::is_convertible<U&&, absl::Status>>,
-              std::is_constructible<absl::Status, U&&>,
-              absl::negation<std::is_same<absl::decay_t<U>, absl::StatusOr<T>>>,
-              absl::negation<std::is_same<absl::decay_t<U>, T>>,
-              absl::negation<std::is_same<absl::decay_t<U>, absl::in_place_t>>,
-              absl::negation<internal_statusor::HasConversionOperatorToStatusOr<
-                  T, U&&>>>::value,
-          int> = 0>
-  explicit StatusOr(U&& v) : Base(std::forward<U>(v)) {}
-
-  template <
-      typename U = absl::Status,
-      absl::enable_if_t<
-          absl::conjunction<
-              std::is_convertible<U&&, absl::Status>,
-              std::is_constructible<absl::Status, U&&>,
-              absl::negation<std::is_same<absl::decay_t<U>, absl::StatusOr<T>>>,
-              absl::negation<std::is_same<absl::decay_t<U>, T>>,
-              absl::negation<std::is_same<absl::decay_t<U>, absl::in_place_t>>,
-              absl::negation<internal_statusor::HasConversionOperatorToStatusOr<
-                  T, U&&>>>::value,
-          int> = 0>
-  StatusOr& operator=(U&& v) {
-    this->AssignStatus(std::forward<U>(v));
-    return *this;
-  }
-
-  // Perfect-forwarding value assignment operator.
-
-  // If `*this` contains a `T` value before the call, the contained value is
-  // assigned from `std::forward<U>(v)`; Otherwise, it is directly-initialized
-  // from `std::forward<U>(v)`.
-  // This function does not participate in overload unless:
-  // 1. `std::is_constructible_v<T, U>` is true,
-  // 2. `std::is_assignable_v<T&, U>` is true.
-  // 3. `std::is_same_v<StatusOr<T>, std::remove_cvref_t<U>>` is false.
-  // 4. Assigning `U` to `T` is not ambiguous:
-  //  If `U` is `StatusOr<V>` and `T` is constructible and assignable from
-  //  both `StatusOr<V>` and `V`, the assignment is considered bug-prone and
-  //  ambiguous thus will fail to compile. For example:
-  //    StatusOr<bool> s1 = true;  // s1.ok() && *s1 == true
-  //    StatusOr<bool> s2 = false;  // s2.ok() && *s2 == false
-  //    s1 = s2;  // ambiguous, `s1 = *s2` or `s1 = bool(s2)`?
-  template <
-      typename U = T,
-      typename = typename std::enable_if<absl::conjunction<
-          std::is_constructible<T, U&&>, std::is_assignable<T&, U&&>,
-          absl::disjunction<
-              std::is_same<absl::remove_cv_t<absl::remove_reference_t<U>>, T>,
-              absl::conjunction<
-                  absl::negation<std::is_convertible<U&&, absl::Status>>,
-                  absl::negation<internal_statusor::
-                                     HasConversionOperatorToStatusOr<T, U&&>>>>,
-          internal_statusor::IsForwardingAssignmentValid<T, U&&>>::value>::type>
-  StatusOr& operator=(U&& v) {
-    this->Assign(std::forward<U>(v));
-    return *this;
-  }
-
-  // Constructs the inner value `T` in-place using the provided args, using the
-  // `T(args...)` constructor.
-  template <typename... Args>
-  explicit StatusOr(absl::in_place_t, Args&&... args);
-  template <typename U, typename... Args>
-  explicit StatusOr(absl::in_place_t, std::initializer_list<U> ilist,
-                    Args&&... args);
-
-  // Constructs the inner value `T` in-place using the provided args, using the
-  // `T(U)` (direct-initialization) constructor. This constructor is only valid
-  // if `T` can be constructed from a `U`. Can accept move or copy constructors.
-  //
-  // This constructor is explicit if `U` is not convertible to `T`. To avoid
-  // ambiguity, this constuctor is disabled if `U` is a `StatusOr<J>`, where `J`
-  // is convertible to `T`.
-  template <
-      typename U = T,
-      absl::enable_if_t<
-          absl::conjunction<
-              internal_statusor::IsDirectInitializationValid<T, U&&>,
-              std::is_constructible<T, U&&>, std::is_convertible<U&&, T>,
-              absl::disjunction<
-                  std::is_same<absl::remove_cv_t<absl::remove_reference_t<U>>,
-                               T>,
-                  absl::conjunction<
-                      absl::negation<std::is_convertible<U&&, absl::Status>>,
-                      absl::negation<
-                          internal_statusor::HasConversionOperatorToStatusOr<
-                              T, U&&>>>>>::value,
-          int> = 0>
-  StatusOr(U&& u)  // NOLINT
-      : StatusOr(absl::in_place, std::forward<U>(u)) {
-  }
-
-  template <
-      typename U = T,
-      absl::enable_if_t<
-          absl::conjunction<
-              internal_statusor::IsDirectInitializationValid<T, U&&>,
-              absl::disjunction<
-                  std::is_same<absl::remove_cv_t<absl::remove_reference_t<U>>,
-                               T>,
-                  absl::conjunction<
-                      absl::negation<std::is_constructible<absl::Status, U&&>>,
-                      absl::negation<
-                          internal_statusor::HasConversionOperatorToStatusOr<
-                              T, U&&>>>>,
-              std::is_constructible<T, U&&>,
-              absl::negation<std::is_convertible<U&&, T>>>::value,
-          int> = 0>
-  explicit StatusOr(U&& u)  // NOLINT
-      : StatusOr(absl::in_place, std::forward<U>(u)) {
-  }
-
-  // StatusOr<T>::ok()
-  //
-  // Returns whether or not this `absl::StatusOr<T>` holds a `T` value. This
-  // member function is analagous to `absl::Status::ok()` and should be used
-  // similarly to check the status of return values.
-  //
-  // Example:
-  //
-  // StatusOr<Foo> result = DoBigCalculationThatCouldFail();
-  // if (result.ok()) {
-  //    // Handle result
-  // else {
-  //    // Handle error
-  // }
-  ABSL_MUST_USE_RESULT bool ok() const { return this->status_.ok(); }
-
-  // StatusOr<T>::status()
-  //
-  // Returns a reference to the current `absl::Status` contained within the
-  // `absl::StatusOr<T>`. If `absl::StatusOr<T>` contains a `T`, then this
-  // function returns `absl::OkStatus()`.
-  const Status& status() const &;
-  Status status() &&;
-
-  // StatusOr<T>::value()
-  //
-  // Returns a reference to the held value if `this->ok()`. Otherwise, throws
-  // `absl::BadStatusOrAccess` if exceptions are enabled, or is guaranteed to
-  // terminate the process if exceptions are disabled.
-  //
-  // If you have already checked the status using `this->ok()`, you probably
-  // want to use `operator*()` or `operator->()` to access the value instead of
-  // `value`.
-  //
-  // Note: for value types that are cheap to copy, prefer simple code:
-  //
-  //   T value = statusor.value();
-  //
-  // Otherwise, if the value type is expensive to copy, but can be left
-  // in the StatusOr, simply assign to a reference:
-  //
-  //   T& value = statusor.value();  // or `const T&`
-  //
-  // Otherwise, if the value type supports an efficient move, it can be
-  // used as follows:
-  //
-  //   T value = std::move(statusor).value();
-  //
-  // The `std::move` on statusor instead of on the whole expression enables
-  // warnings about possible uses of the statusor object after the move.
-  const T& value() const&;
-  T& value() &;
-  const T&& value() const&&;
-  T&& value() &&;
-
-  // StatusOr<T>:: operator*()
-  //
-  // Returns a reference to the current value.
-  //
-  // REQUIRES: `this->ok() == true`, otherwise the behavior is undefined.
-  //
-  // Use `this->ok()` to verify that there is a current value within the
-  // `absl::StatusOr<T>`. Alternatively, see the `value()` member function for a
-  // similar API that guarantees crashing or throwing an exception if there is
-  // no current value.
-  const T& operator*() const&;
-  T& operator*() &;
-  const T&& operator*() const&&;
-  T&& operator*() &&;
-
-  // StatusOr<T>::operator->()
-  //
-  // Returns a pointer to the current value.
-  //
-  // REQUIRES: `this->ok() == true`, otherwise the behavior is undefined.
-  //
-  // Use `this->ok()` to verify that there is a current value.
-  const T* operator->() const;
-  T* operator->();
-
-  // StatusOr<T>::value_or()
-  //
-  // Returns the current value if `this->ok() == true`. Otherwise constructs a
-  // value using the provided `default_value`.
-  //
-  // Unlike `value`, this function returns by value, copying the current value
-  // if necessary. If the value type supports an efficient move, it can be used
-  // as follows:
-  //
-  //   T value = std::move(statusor).value_or(def);
-  //
-  // Unlike with `value`, calling `std::move()` on the result of `value_or` will
-  // still trigger a copy.
-  template <typename U>
-  T value_or(U&& default_value) const&;
-  template <typename U>
-  T value_or(U&& default_value) &&;
-
-  // StatusOr<T>::IgnoreError()
-  //
-  // Ignores any errors. This method does nothing except potentially suppress
-  // complaints from any tools that are checking that errors are not dropped on
-  // the floor.
-  void IgnoreError() const;
-
-  // StatusOr<T>::emplace()
-  //
-  // Reconstructs the inner value T in-place using the provided args, using the
-  // T(args...) constructor. Returns reference to the reconstructed `T`.
-  template <typename... Args>
-  T& emplace(Args&&... args) {
-    if (ok()) {
-      this->Clear();
-      this->MakeValue(std::forward<Args>(args)...);
-    } else {
-      this->MakeValue(std::forward<Args>(args)...);
-      this->status_ = absl::OkStatus();
-    }
-    return this->data_;
-  }
-
-  template <
-      typename U, typename... Args,
-      absl::enable_if_t<
-          std::is_constructible<T, std::initializer_list<U>&, Args&&...>::value,
-          int> = 0>
-  T& emplace(std::initializer_list<U> ilist, Args&&... args) {
-    if (ok()) {
-      this->Clear();
-      this->MakeValue(ilist, std::forward<Args>(args)...);
-    } else {
-      this->MakeValue(ilist, std::forward<Args>(args)...);
-      this->status_ = absl::OkStatus();
-    }
-    return this->data_;
-  }
-
- private:
-  using internal_statusor::StatusOrData<T>::Assign;
-  template <typename U>
-  void Assign(const absl::StatusOr<U>& other);
-  template <typename U>
-  void Assign(absl::StatusOr<U>&& other);
-};
-
-// operator==()
-//
-// This operator checks the equality of two `absl::StatusOr<T>` objects.
-template <typename T>
-bool operator==(const StatusOr<T>& lhs, const StatusOr<T>& rhs) {
-  if (lhs.ok() && rhs.ok()) return *lhs == *rhs;
-  return lhs.status() == rhs.status();
-}
-
-// operator!=()
-//
-// This operator checks the inequality of two `absl::StatusOr<T>` objects.
-template <typename T>
-bool operator!=(const StatusOr<T>& lhs, const StatusOr<T>& rhs) {
-  return !(lhs == rhs);
-}
-
-//------------------------------------------------------------------------------
-// Implementation details for StatusOr<T>
-//------------------------------------------------------------------------------
-
-// TODO(sbenza): avoid the string here completely.
-template <typename T>
-StatusOr<T>::StatusOr() : Base(Status(absl::StatusCode::kUnknown, "")) {}
-
-template <typename T>
-template <typename U>
-inline void StatusOr<T>::Assign(const StatusOr<U>& other) {
-  if (other.ok()) {
-    this->Assign(*other);
-  } else {
-    this->AssignStatus(other.status());
-  }
-}
-
-template <typename T>
-template <typename U>
-inline void StatusOr<T>::Assign(StatusOr<U>&& other) {
-  if (other.ok()) {
-    this->Assign(*std::move(other));
-  } else {
-    this->AssignStatus(std::move(other).status());
-  }
-}
-template <typename T>
-template <typename... Args>
-StatusOr<T>::StatusOr(absl::in_place_t, Args&&... args)
-    : Base(absl::in_place, std::forward<Args>(args)...) {}
-
-template <typename T>
-template <typename U, typename... Args>
-StatusOr<T>::StatusOr(absl::in_place_t, std::initializer_list<U> ilist,
-                      Args&&... args)
-    : Base(absl::in_place, ilist, std::forward<Args>(args)...) {}
-
-template <typename T>
-const Status& StatusOr<T>::status() const & { return this->status_; }
-template <typename T>
-Status StatusOr<T>::status() && {
-  return ok() ? OkStatus() : std::move(this->status_);
-}
-
-template <typename T>
-const T& StatusOr<T>::value() const& {
-  if (!this->ok()) internal_statusor::ThrowBadStatusOrAccess(this->status_);
-  return this->data_;
-}
-
-template <typename T>
-T& StatusOr<T>::value() & {
-  if (!this->ok()) internal_statusor::ThrowBadStatusOrAccess(this->status_);
-  return this->data_;
-}
-
-template <typename T>
-const T&& StatusOr<T>::value() const&& {
-  if (!this->ok()) {
-    internal_statusor::ThrowBadStatusOrAccess(std::move(this->status_));
-  }
-  return std::move(this->data_);
-}
-
-template <typename T>
-T&& StatusOr<T>::value() && {
-  if (!this->ok()) {
-    internal_statusor::ThrowBadStatusOrAccess(std::move(this->status_));
-  }
-  return std::move(this->data_);
-}
-
-template <typename T>
-const T& StatusOr<T>::operator*() const& {
-  this->EnsureOk();
-  return this->data_;
-}
-
-template <typename T>
-T& StatusOr<T>::operator*() & {
-  this->EnsureOk();
-  return this->data_;
-}
-
-template <typename T>
-const T&& StatusOr<T>::operator*() const&& {
-  this->EnsureOk();
-  return std::move(this->data_);
-}
-
-template <typename T>
-T&& StatusOr<T>::operator*() && {
-  this->EnsureOk();
-  return std::move(this->data_);
-}
-
-template <typename T>
-const T* StatusOr<T>::operator->() const {
-  this->EnsureOk();
-  return &this->data_;
-}
-
-template <typename T>
-T* StatusOr<T>::operator->() {
-  this->EnsureOk();
-  return &this->data_;
-}
-
-template <typename T>
-template <typename U>
-T StatusOr<T>::value_or(U&& default_value) const& {
-  if (ok()) {
-    return this->data_;
-  }
-  return std::forward<U>(default_value);
-}
-
-template <typename T>
-template <typename U>
-T StatusOr<T>::value_or(U&& default_value) && {
-  if (ok()) {
-    return std::move(this->data_);
-  }
-  return std::forward<U>(default_value);
-}
-
-template <typename T>
-void StatusOr<T>::IgnoreError() const {
-  // no-op
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STATUS_STATUSOR_H_
diff --git a/third_party/abseil/absl/status/statusor_test.cc b/third_party/abseil/absl/status/statusor_test.cc
deleted file mode 100644
index c2e8fb7..0000000
--- a/third_party/abseil/absl/status/statusor_test.cc
+++ /dev/null
@@ -1,1811 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/status/statusor.h"
-
-#include <array>
-#include <initializer_list>
-#include <memory>
-#include <type_traits>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/casts.h"
-#include "absl/memory/memory.h"
-#include "absl/status/status.h"
-#include "absl/types/any.h"
-#include "absl/utility/utility.h"
-
-namespace {
-
-using ::testing::AllOf;
-using ::testing::AnyWith;
-using ::testing::ElementsAre;
-using ::testing::Field;
-using ::testing::Ne;
-using ::testing::Not;
-using ::testing::Pointee;
-using ::testing::VariantWith;
-
-#ifdef GTEST_HAS_STATUS_MATCHERS
-using ::testing::status::IsOk;
-using ::testing::status::IsOkAndHolds;
-#else  // GTEST_HAS_STATUS_MATCHERS
-inline const ::absl::Status& GetStatus(const ::absl::Status& status) {
-  return status;
-}
-
-template <typename T>
-inline const ::absl::Status& GetStatus(const ::absl::StatusOr<T>& status) {
-  return status.status();
-}
-
-// Monomorphic implementation of matcher IsOkAndHolds(m).  StatusOrType is a
-// reference to StatusOr<T>.
-template <typename StatusOrType>
-class IsOkAndHoldsMatcherImpl
-    : public ::testing::MatcherInterface<StatusOrType> {
- public:
-  typedef
-      typename std::remove_reference<StatusOrType>::type::value_type value_type;
-
-  template <typename InnerMatcher>
-  explicit IsOkAndHoldsMatcherImpl(InnerMatcher&& inner_matcher)
-      : inner_matcher_(::testing::SafeMatcherCast<const value_type&>(
-            std::forward<InnerMatcher>(inner_matcher))) {}
-
-  void DescribeTo(std::ostream* os) const override {
-    *os << "is OK and has a value that ";
-    inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const override {
-    *os << "isn't OK or has a value that ";
-    inner_matcher_.DescribeNegationTo(os);
-  }
-
-  bool MatchAndExplain(
-      StatusOrType actual_value,
-      ::testing::MatchResultListener* result_listener) const override {
-    if (!actual_value.ok()) {
-      *result_listener << "which has status " << actual_value.status();
-      return false;
-    }
-
-    ::testing::StringMatchResultListener inner_listener;
-    const bool matches =
-        inner_matcher_.MatchAndExplain(*actual_value, &inner_listener);
-    const std::string inner_explanation = inner_listener.str();
-    if (!inner_explanation.empty()) {
-      *result_listener << "which contains value "
-                       << ::testing::PrintToString(*actual_value) << ", "
-                       << inner_explanation;
-    }
-    return matches;
-  }
-
- private:
-  const ::testing::Matcher<const value_type&> inner_matcher_;
-};
-
-// Implements IsOkAndHolds(m) as a polymorphic matcher.
-template <typename InnerMatcher>
-class IsOkAndHoldsMatcher {
- public:
-  explicit IsOkAndHoldsMatcher(InnerMatcher inner_matcher)
-      : inner_matcher_(std::move(inner_matcher)) {}
-
-  // Converts this polymorphic matcher to a monomorphic matcher of the
-  // given type.  StatusOrType can be either StatusOr<T> or a
-  // reference to StatusOr<T>.
-  template <typename StatusOrType>
-  operator ::testing::Matcher<StatusOrType>() const {  // NOLINT
-    return ::testing::Matcher<StatusOrType>(
-        new IsOkAndHoldsMatcherImpl<const StatusOrType&>(inner_matcher_));
-  }
-
- private:
-  const InnerMatcher inner_matcher_;
-};
-
-// Monomorphic implementation of matcher IsOk() for a given type T.
-// T can be Status, StatusOr<>, or a reference to either of them.
-template <typename T>
-class MonoIsOkMatcherImpl : public ::testing::MatcherInterface<T> {
- public:
-  void DescribeTo(std::ostream* os) const override { *os << "is OK"; }
-  void DescribeNegationTo(std::ostream* os) const override {
-    *os << "is not OK";
-  }
-  bool MatchAndExplain(T actual_value,
-                       ::testing::MatchResultListener*) const override {
-    return GetStatus(actual_value).ok();
-  }
-};
-
-// Implements IsOk() as a polymorphic matcher.
-class IsOkMatcher {
- public:
-  template <typename T>
-  operator ::testing::Matcher<T>() const {  // NOLINT
-    return ::testing::Matcher<T>(new MonoIsOkMatcherImpl<T>());
-  }
-};
-
-// Macros for testing the results of functions that return absl::Status or
-// absl::StatusOr<T> (for any type T).
-#define EXPECT_OK(expression) EXPECT_THAT(expression, IsOk())
-
-// Returns a gMock matcher that matches a StatusOr<> whose status is
-// OK and whose value matches the inner matcher.
-template <typename InnerMatcher>
-IsOkAndHoldsMatcher<typename std::decay<InnerMatcher>::type> IsOkAndHolds(
-    InnerMatcher&& inner_matcher) {
-  return IsOkAndHoldsMatcher<typename std::decay<InnerMatcher>::type>(
-      std::forward<InnerMatcher>(inner_matcher));
-}
-
-// Returns a gMock matcher that matches a Status or StatusOr<> which is OK.
-inline IsOkMatcher IsOk() { return IsOkMatcher(); }
-#endif  // GTEST_HAS_STATUS_MATCHERS
-
-struct CopyDetector {
-  CopyDetector() = default;
-  explicit CopyDetector(int xx) : x(xx) {}
-  CopyDetector(CopyDetector&& d) noexcept
-      : x(d.x), copied(false), moved(true) {}
-  CopyDetector(const CopyDetector& d) : x(d.x), copied(true), moved(false) {}
-  CopyDetector& operator=(const CopyDetector& c) {
-    x = c.x;
-    copied = true;
-    moved = false;
-    return *this;
-  }
-  CopyDetector& operator=(CopyDetector&& c) noexcept {
-    x = c.x;
-    copied = false;
-    moved = true;
-    return *this;
-  }
-  int x = 0;
-  bool copied = false;
-  bool moved = false;
-};
-
-testing::Matcher<const CopyDetector&> CopyDetectorHas(int a, bool b, bool c) {
-  return AllOf(Field(&CopyDetector::x, a), Field(&CopyDetector::moved, b),
-               Field(&CopyDetector::copied, c));
-}
-
-class Base1 {
- public:
-  virtual ~Base1() {}
-  int pad;
-};
-
-class Base2 {
- public:
-  virtual ~Base2() {}
-  int yetotherpad;
-};
-
-class Derived : public Base1, public Base2 {
- public:
-  virtual ~Derived() {}
-  int evenmorepad;
-};
-
-class CopyNoAssign {
- public:
-  explicit CopyNoAssign(int value) : foo(value) {}
-  CopyNoAssign(const CopyNoAssign& other) : foo(other.foo) {}
-  int foo;
-
- private:
-  const CopyNoAssign& operator=(const CopyNoAssign&);
-};
-
-absl::StatusOr<std::unique_ptr<int>> ReturnUniquePtr() {
-  // Uses implicit constructor from T&&
-  return absl::make_unique<int>(0);
-}
-
-TEST(StatusOr, ElementType) {
-  static_assert(std::is_same<absl::StatusOr<int>::value_type, int>(), "");
-  static_assert(std::is_same<absl::StatusOr<char>::value_type, char>(), "");
-}
-
-TEST(StatusOr, TestMoveOnlyInitialization) {
-  absl::StatusOr<std::unique_ptr<int>> thing(ReturnUniquePtr());
-  ASSERT_TRUE(thing.ok());
-  EXPECT_EQ(0, **thing);
-  int* previous = thing->get();
-
-  thing = ReturnUniquePtr();
-  EXPECT_TRUE(thing.ok());
-  EXPECT_EQ(0, **thing);
-  EXPECT_NE(previous, thing->get());
-}
-
-TEST(StatusOr, TestMoveOnlyValueExtraction) {
-  absl::StatusOr<std::unique_ptr<int>> thing(ReturnUniquePtr());
-  ASSERT_TRUE(thing.ok());
-  std::unique_ptr<int> ptr = *std::move(thing);
-  EXPECT_EQ(0, *ptr);
-
-  thing = std::move(ptr);
-  ptr = std::move(*thing);
-  EXPECT_EQ(0, *ptr);
-}
-
-TEST(StatusOr, TestMoveOnlyInitializationFromTemporaryByValueOrDie) {
-  std::unique_ptr<int> ptr(*ReturnUniquePtr());
-  EXPECT_EQ(0, *ptr);
-}
-
-TEST(StatusOr, TestValueOrDieOverloadForConstTemporary) {
-  static_assert(
-      std::is_same<const int&&,
-                   decltype(
-                       std::declval<const absl::StatusOr<int>&&>().value())>(),
-      "value() for const temporaries should return const T&&");
-}
-
-TEST(StatusOr, TestMoveOnlyConversion) {
-  absl::StatusOr<std::unique_ptr<const int>> const_thing(ReturnUniquePtr());
-  EXPECT_TRUE(const_thing.ok());
-  EXPECT_EQ(0, **const_thing);
-
-  // Test rvalue converting assignment
-  const int* const_previous = const_thing->get();
-  const_thing = ReturnUniquePtr();
-  EXPECT_TRUE(const_thing.ok());
-  EXPECT_EQ(0, **const_thing);
-  EXPECT_NE(const_previous, const_thing->get());
-}
-
-TEST(StatusOr, TestMoveOnlyVector) {
-  // Sanity check that absl::StatusOr<MoveOnly> works in vector.
-  std::vector<absl::StatusOr<std::unique_ptr<int>>> vec;
-  vec.push_back(ReturnUniquePtr());
-  vec.resize(2);
-  auto another_vec = std::move(vec);
-  EXPECT_EQ(0, **another_vec[0]);
-  EXPECT_EQ(absl::UnknownError(""), another_vec[1].status());
-}
-
-TEST(StatusOr, TestDefaultCtor) {
-  absl::StatusOr<int> thing;
-  EXPECT_FALSE(thing.ok());
-  EXPECT_EQ(thing.status().code(), absl::StatusCode::kUnknown);
-}
-
-TEST(StatusOr, StatusCtorForwards) {
-  absl::Status status(absl::StatusCode::kInternal, "Some error");
-
-  EXPECT_EQ(absl::StatusOr<int>(status).status().message(), "Some error");
-  EXPECT_EQ(status.message(), "Some error");
-
-  EXPECT_EQ(absl::StatusOr<int>(std::move(status)).status().message(),
-            "Some error");
-  EXPECT_NE(status.message(), "Some error");
-}
-
-// Define `EXPECT_DEATH_OR_THROW` to test the behavior of `StatusOr::value`,
-// which either throws `BadStatusOrAccess` or `LOG(FATAL)` based on whether
-// exceptions are enabled.
-#ifdef ABSL_HAVE_EXCEPTIONS
-#define EXPECT_DEATH_OR_THROW(statement, status_)    \
-  EXPECT_THROW(                                      \
-      {                                              \
-        try {                                        \
-          statement;                                 \
-        } catch (const absl::BadStatusOrAccess& e) { \
-          EXPECT_EQ(e.status(), status_);            \
-          throw;                                     \
-        }                                            \
-      },                                             \
-      absl::BadStatusOrAccess);
-#else  // ABSL_HAVE_EXCEPTIONS
-#define EXPECT_DEATH_OR_THROW(statement, status) \
-  EXPECT_DEATH_IF_SUPPORTED(statement, status.ToString());
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-TEST(StatusOrDeathTest, TestDefaultCtorValue) {
-  absl::StatusOr<int> thing;
-  EXPECT_DEATH_OR_THROW(thing.value(), absl::UnknownError(""));
-  const absl::StatusOr<int> thing2;
-  EXPECT_DEATH_OR_THROW(thing2.value(), absl::UnknownError(""));
-}
-
-TEST(StatusOrDeathTest, TestValueNotOk) {
-  absl::StatusOr<int> thing(absl::CancelledError());
-  EXPECT_DEATH_OR_THROW(thing.value(), absl::CancelledError());
-}
-
-TEST(StatusOrDeathTest, TestValueNotOkConst) {
-  const absl::StatusOr<int> thing(absl::UnknownError(""));
-  EXPECT_DEATH_OR_THROW(thing.value(), absl::UnknownError(""));
-}
-
-TEST(StatusOrDeathTest, TestPointerDefaultCtorValue) {
-  absl::StatusOr<int*> thing;
-  EXPECT_DEATH_OR_THROW(thing.value(), absl::UnknownError(""));
-}
-
-TEST(StatusOrDeathTest, TestPointerValueNotOk) {
-  absl::StatusOr<int*> thing(absl::CancelledError());
-  EXPECT_DEATH_OR_THROW(thing.value(), absl::CancelledError());
-}
-
-TEST(StatusOrDeathTest, TestPointerValueNotOkConst) {
-  const absl::StatusOr<int*> thing(absl::CancelledError());
-  EXPECT_DEATH_OR_THROW(thing.value(), absl::CancelledError());
-}
-
-#if GTEST_HAS_DEATH_TEST
-TEST(StatusOrDeathTest, TestStatusCtorStatusOk) {
-  EXPECT_DEBUG_DEATH(
-      {
-        // This will DCHECK
-        absl::StatusOr<int> thing(absl::OkStatus());
-        // In optimized mode, we are actually going to get error::INTERNAL for
-        // status here, rather than crashing, so check that.
-        EXPECT_FALSE(thing.ok());
-        EXPECT_EQ(thing.status().code(), absl::StatusCode::kInternal);
-      },
-      "An OK status is not a valid constructor argument");
-}
-
-TEST(StatusOrDeathTest, TestPointerStatusCtorStatusOk) {
-  EXPECT_DEBUG_DEATH(
-      {
-        absl::StatusOr<int*> thing(absl::OkStatus());
-        // In optimized mode, we are actually going to get error::INTERNAL for
-        // status here, rather than crashing, so check that.
-        EXPECT_FALSE(thing.ok());
-        EXPECT_EQ(thing.status().code(), absl::StatusCode::kInternal);
-      },
-      "An OK status is not a valid constructor argument");
-}
-#endif
-
-TEST(StatusOr, ValueAccessor) {
-  const int kIntValue = 110;
-  {
-    absl::StatusOr<int> status_or(kIntValue);
-    EXPECT_EQ(kIntValue, status_or.value());
-    EXPECT_EQ(kIntValue, std::move(status_or).value());
-  }
-  {
-    absl::StatusOr<CopyDetector> status_or(kIntValue);
-    EXPECT_THAT(status_or,
-                IsOkAndHolds(CopyDetectorHas(kIntValue, false, false)));
-    CopyDetector copy_detector = status_or.value();
-    EXPECT_THAT(copy_detector, CopyDetectorHas(kIntValue, false, true));
-    copy_detector = std::move(status_or).value();
-    EXPECT_THAT(copy_detector, CopyDetectorHas(kIntValue, true, false));
-  }
-}
-
-TEST(StatusOr, BadValueAccess) {
-  const absl::Status kError = absl::CancelledError("message");
-  absl::StatusOr<int> status_or(kError);
-  EXPECT_DEATH_OR_THROW(status_or.value(), kError);
-}
-
-TEST(StatusOr, TestStatusCtor) {
-  absl::StatusOr<int> thing(absl::CancelledError());
-  EXPECT_FALSE(thing.ok());
-  EXPECT_EQ(thing.status().code(), absl::StatusCode::kCancelled);
-}
-
-
-
-TEST(StatusOr, TestValueCtor) {
-  const int kI = 4;
-  const absl::StatusOr<int> thing(kI);
-  EXPECT_TRUE(thing.ok());
-  EXPECT_EQ(kI, *thing);
-}
-
-struct Foo {
-  const int x;
-  explicit Foo(int y) : x(y) {}
-};
-
-TEST(StatusOr, InPlaceConstruction) {
-  EXPECT_THAT(absl::StatusOr<Foo>(absl::in_place, 10),
-              IsOkAndHolds(Field(&Foo::x, 10)));
-}
-
-struct InPlaceHelper {
-  InPlaceHelper(std::initializer_list<int> xs, std::unique_ptr<int> yy)
-      : x(xs), y(std::move(yy)) {}
-  const std::vector<int> x;
-  std::unique_ptr<int> y;
-};
-
-TEST(StatusOr, InPlaceInitListConstruction) {
-  absl::StatusOr<InPlaceHelper> status_or(absl::in_place, {10, 11, 12},
-                                          absl::make_unique<int>(13));
-  EXPECT_THAT(status_or, IsOkAndHolds(AllOf(
-                             Field(&InPlaceHelper::x, ElementsAre(10, 11, 12)),
-                             Field(&InPlaceHelper::y, Pointee(13)))));
-}
-
-TEST(StatusOr, Emplace) {
-  absl::StatusOr<Foo> status_or_foo(10);
-  status_or_foo.emplace(20);
-  EXPECT_THAT(status_or_foo, IsOkAndHolds(Field(&Foo::x, 20)));
-  status_or_foo = absl::InvalidArgumentError("msg");
-  EXPECT_FALSE(status_or_foo.ok());
-  EXPECT_EQ(status_or_foo.status().code(), absl::StatusCode::kInvalidArgument);
-  EXPECT_EQ(status_or_foo.status().message(), "msg");
-  status_or_foo.emplace(20);
-  EXPECT_THAT(status_or_foo, IsOkAndHolds(Field(&Foo::x, 20)));
-}
-
-TEST(StatusOr, EmplaceInitializerList) {
-  absl::StatusOr<InPlaceHelper> status_or(absl::in_place, {10, 11, 12},
-                                          absl::make_unique<int>(13));
-  status_or.emplace({1, 2, 3}, absl::make_unique<int>(4));
-  EXPECT_THAT(status_or,
-              IsOkAndHolds(AllOf(Field(&InPlaceHelper::x, ElementsAre(1, 2, 3)),
-                                 Field(&InPlaceHelper::y, Pointee(4)))));
-  status_or = absl::InvalidArgumentError("msg");
-  EXPECT_FALSE(status_or.ok());
-  EXPECT_EQ(status_or.status().code(), absl::StatusCode::kInvalidArgument);
-  EXPECT_EQ(status_or.status().message(), "msg");
-  status_or.emplace({1, 2, 3}, absl::make_unique<int>(4));
-  EXPECT_THAT(status_or,
-              IsOkAndHolds(AllOf(Field(&InPlaceHelper::x, ElementsAre(1, 2, 3)),
-                                 Field(&InPlaceHelper::y, Pointee(4)))));
-}
-
-TEST(StatusOr, TestCopyCtorStatusOk) {
-  const int kI = 4;
-  const absl::StatusOr<int> original(kI);
-  const absl::StatusOr<int> copy(original);
-  EXPECT_OK(copy.status());
-  EXPECT_EQ(*original, *copy);
-}
-
-TEST(StatusOr, TestCopyCtorStatusNotOk) {
-  absl::StatusOr<int> original(absl::CancelledError());
-  absl::StatusOr<int> copy(original);
-  EXPECT_EQ(copy.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, TestCopyCtorNonAssignable) {
-  const int kI = 4;
-  CopyNoAssign value(kI);
-  absl::StatusOr<CopyNoAssign> original(value);
-  absl::StatusOr<CopyNoAssign> copy(original);
-  EXPECT_OK(copy.status());
-  EXPECT_EQ(original->foo, copy->foo);
-}
-
-TEST(StatusOr, TestCopyCtorStatusOKConverting) {
-  const int kI = 4;
-  absl::StatusOr<int> original(kI);
-  absl::StatusOr<double> copy(original);
-  EXPECT_OK(copy.status());
-  EXPECT_DOUBLE_EQ(*original, *copy);
-}
-
-TEST(StatusOr, TestCopyCtorStatusNotOkConverting) {
-  absl::StatusOr<int> original(absl::CancelledError());
-  absl::StatusOr<double> copy(original);
-  EXPECT_EQ(copy.status(), original.status());
-}
-
-TEST(StatusOr, TestAssignmentStatusOk) {
-  // Copy assignmment
-  {
-    const auto p = std::make_shared<int>(17);
-    absl::StatusOr<std::shared_ptr<int>> source(p);
-
-    absl::StatusOr<std::shared_ptr<int>> target;
-    target = source;
-
-    ASSERT_TRUE(target.ok());
-    EXPECT_OK(target.status());
-    EXPECT_EQ(p, *target);
-
-    ASSERT_TRUE(source.ok());
-    EXPECT_OK(source.status());
-    EXPECT_EQ(p, *source);
-  }
-
-  // Move asssignment
-  {
-    const auto p = std::make_shared<int>(17);
-    absl::StatusOr<std::shared_ptr<int>> source(p);
-
-    absl::StatusOr<std::shared_ptr<int>> target;
-    target = std::move(source);
-
-    ASSERT_TRUE(target.ok());
-    EXPECT_OK(target.status());
-    EXPECT_EQ(p, *target);
-
-    ASSERT_TRUE(source.ok());
-    EXPECT_OK(source.status());
-    EXPECT_EQ(nullptr, *source);
-  }
-}
-
-TEST(StatusOr, TestAssignmentStatusNotOk) {
-  // Copy assignment
-  {
-    const absl::Status expected = absl::CancelledError();
-    absl::StatusOr<int> source(expected);
-
-    absl::StatusOr<int> target;
-    target = source;
-
-    EXPECT_FALSE(target.ok());
-    EXPECT_EQ(expected, target.status());
-
-    EXPECT_FALSE(source.ok());
-    EXPECT_EQ(expected, source.status());
-  }
-
-  // Move assignment
-  {
-    const absl::Status expected = absl::CancelledError();
-    absl::StatusOr<int> source(expected);
-
-    absl::StatusOr<int> target;
-    target = std::move(source);
-
-    EXPECT_FALSE(target.ok());
-    EXPECT_EQ(expected, target.status());
-
-    EXPECT_FALSE(source.ok());
-    EXPECT_EQ(source.status().code(), absl::StatusCode::kInternal);
-  }
-}
-
-TEST(StatusOr, TestAssignmentStatusOKConverting) {
-  // Copy assignment
-  {
-    const int kI = 4;
-    absl::StatusOr<int> source(kI);
-
-    absl::StatusOr<double> target;
-    target = source;
-
-    ASSERT_TRUE(target.ok());
-    EXPECT_OK(target.status());
-    EXPECT_DOUBLE_EQ(kI, *target);
-
-    ASSERT_TRUE(source.ok());
-    EXPECT_OK(source.status());
-    EXPECT_DOUBLE_EQ(kI, *source);
-  }
-
-  // Move assignment
-  {
-    const auto p = new int(17);
-    absl::StatusOr<std::unique_ptr<int>> source(absl::WrapUnique(p));
-
-    absl::StatusOr<std::shared_ptr<int>> target;
-    target = std::move(source);
-
-    ASSERT_TRUE(target.ok());
-    EXPECT_OK(target.status());
-    EXPECT_EQ(p, target->get());
-
-    ASSERT_TRUE(source.ok());
-    EXPECT_OK(source.status());
-    EXPECT_EQ(nullptr, source->get());
-  }
-}
-
-struct A {
-  int x;
-};
-
-struct ImplicitConstructibleFromA {
-  int x;
-  bool moved;
-  ImplicitConstructibleFromA(const A& a)  // NOLINT
-      : x(a.x), moved(false) {}
-  ImplicitConstructibleFromA(A&& a)  // NOLINT
-      : x(a.x), moved(true) {}
-};
-
-TEST(StatusOr, ImplicitConvertingConstructor) {
-  EXPECT_THAT(
-      absl::implicit_cast<absl::StatusOr<ImplicitConstructibleFromA>>(
-          absl::StatusOr<A>(A{11})),
-      IsOkAndHolds(AllOf(Field(&ImplicitConstructibleFromA::x, 11),
-                         Field(&ImplicitConstructibleFromA::moved, true))));
-  absl::StatusOr<A> a(A{12});
-  EXPECT_THAT(
-      absl::implicit_cast<absl::StatusOr<ImplicitConstructibleFromA>>(a),
-      IsOkAndHolds(AllOf(Field(&ImplicitConstructibleFromA::x, 12),
-                         Field(&ImplicitConstructibleFromA::moved, false))));
-}
-
-struct ExplicitConstructibleFromA {
-  int x;
-  bool moved;
-  explicit ExplicitConstructibleFromA(const A& a) : x(a.x), moved(false) {}
-  explicit ExplicitConstructibleFromA(A&& a) : x(a.x), moved(true) {}
-};
-
-TEST(StatusOr, ExplicitConvertingConstructor) {
-  EXPECT_FALSE(
-      (std::is_convertible<const absl::StatusOr<A>&,
-                           absl::StatusOr<ExplicitConstructibleFromA>>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::StatusOr<A>&&,
-                           absl::StatusOr<ExplicitConstructibleFromA>>::value));
-  EXPECT_THAT(
-      absl::StatusOr<ExplicitConstructibleFromA>(absl::StatusOr<A>(A{11})),
-      IsOkAndHolds(AllOf(Field(&ExplicitConstructibleFromA::x, 11),
-                         Field(&ExplicitConstructibleFromA::moved, true))));
-  absl::StatusOr<A> a(A{12});
-  EXPECT_THAT(
-      absl::StatusOr<ExplicitConstructibleFromA>(a),
-      IsOkAndHolds(AllOf(Field(&ExplicitConstructibleFromA::x, 12),
-                         Field(&ExplicitConstructibleFromA::moved, false))));
-}
-
-struct ImplicitConstructibleFromBool {
-  ImplicitConstructibleFromBool(bool y) : x(y) {}  // NOLINT
-  bool x = false;
-};
-
-struct ConvertibleToBool {
-  explicit ConvertibleToBool(bool y) : x(y) {}
-  operator bool() const { return x; }  // NOLINT
-  bool x = false;
-};
-
-TEST(StatusOr, ImplicitBooleanConstructionWithImplicitCasts) {
-  EXPECT_THAT(absl::StatusOr<bool>(absl::StatusOr<ConvertibleToBool>(true)),
-              IsOkAndHolds(true));
-  EXPECT_THAT(absl::StatusOr<bool>(absl::StatusOr<ConvertibleToBool>(false)),
-              IsOkAndHolds(false));
-  EXPECT_THAT(
-      absl::implicit_cast<absl::StatusOr<ImplicitConstructibleFromBool>>(
-          absl::StatusOr<bool>(false)),
-      IsOkAndHolds(Field(&ImplicitConstructibleFromBool::x, false)));
-  EXPECT_FALSE((std::is_convertible<
-                absl::StatusOr<ConvertibleToBool>,
-                absl::StatusOr<ImplicitConstructibleFromBool>>::value));
-}
-
-TEST(StatusOr, BooleanConstructionWithImplicitCasts) {
-  EXPECT_THAT(absl::StatusOr<bool>(absl::StatusOr<ConvertibleToBool>(true)),
-              IsOkAndHolds(true));
-  EXPECT_THAT(absl::StatusOr<bool>(absl::StatusOr<ConvertibleToBool>(false)),
-              IsOkAndHolds(false));
-  EXPECT_THAT(
-      absl::StatusOr<ImplicitConstructibleFromBool>{
-          absl::StatusOr<bool>(false)},
-      IsOkAndHolds(Field(&ImplicitConstructibleFromBool::x, false)));
-  EXPECT_THAT(
-      absl::StatusOr<ImplicitConstructibleFromBool>{
-          absl::StatusOr<bool>(absl::InvalidArgumentError(""))},
-      Not(IsOk()));
-
-  EXPECT_THAT(
-      absl::StatusOr<ImplicitConstructibleFromBool>{
-          absl::StatusOr<ConvertibleToBool>(ConvertibleToBool{false})},
-      IsOkAndHolds(Field(&ImplicitConstructibleFromBool::x, false)));
-  EXPECT_THAT(
-      absl::StatusOr<ImplicitConstructibleFromBool>{
-          absl::StatusOr<ConvertibleToBool>(absl::InvalidArgumentError(""))},
-      Not(IsOk()));
-}
-
-TEST(StatusOr, ConstImplicitCast) {
-  EXPECT_THAT(absl::implicit_cast<absl::StatusOr<bool>>(
-                  absl::StatusOr<const bool>(true)),
-              IsOkAndHolds(true));
-  EXPECT_THAT(absl::implicit_cast<absl::StatusOr<bool>>(
-                  absl::StatusOr<const bool>(false)),
-              IsOkAndHolds(false));
-  EXPECT_THAT(absl::implicit_cast<absl::StatusOr<const bool>>(
-                  absl::StatusOr<bool>(true)),
-              IsOkAndHolds(true));
-  EXPECT_THAT(absl::implicit_cast<absl::StatusOr<const bool>>(
-                  absl::StatusOr<bool>(false)),
-              IsOkAndHolds(false));
-  EXPECT_THAT(absl::implicit_cast<absl::StatusOr<const std::string>>(
-                  absl::StatusOr<std::string>("foo")),
-              IsOkAndHolds("foo"));
-  EXPECT_THAT(absl::implicit_cast<absl::StatusOr<std::string>>(
-                  absl::StatusOr<const std::string>("foo")),
-              IsOkAndHolds("foo"));
-  EXPECT_THAT(
-      absl::implicit_cast<absl::StatusOr<std::shared_ptr<const std::string>>>(
-          absl::StatusOr<std::shared_ptr<std::string>>(
-              std::make_shared<std::string>("foo"))),
-      IsOkAndHolds(Pointee(std::string("foo"))));
-}
-
-TEST(StatusOr, ConstExplicitConstruction) {
-  EXPECT_THAT(absl::StatusOr<bool>(absl::StatusOr<const bool>(true)),
-              IsOkAndHolds(true));
-  EXPECT_THAT(absl::StatusOr<bool>(absl::StatusOr<const bool>(false)),
-              IsOkAndHolds(false));
-  EXPECT_THAT(absl::StatusOr<const bool>(absl::StatusOr<bool>(true)),
-              IsOkAndHolds(true));
-  EXPECT_THAT(absl::StatusOr<const bool>(absl::StatusOr<bool>(false)),
-              IsOkAndHolds(false));
-}
-
-struct ExplicitConstructibleFromInt {
-  int x;
-  explicit ExplicitConstructibleFromInt(int y) : x(y) {}
-};
-
-TEST(StatusOr, ExplicitConstruction) {
-  EXPECT_THAT(absl::StatusOr<ExplicitConstructibleFromInt>(10),
-              IsOkAndHolds(Field(&ExplicitConstructibleFromInt::x, 10)));
-}
-
-TEST(StatusOr, ImplicitConstruction) {
-  // Check implicit casting works.
-  auto status_or =
-      absl::implicit_cast<absl::StatusOr<absl::variant<int, std::string>>>(10);
-  EXPECT_THAT(status_or, IsOkAndHolds(VariantWith<int>(10)));
-}
-
-TEST(StatusOr, ImplicitConstructionFromInitliazerList) {
-  // Note: dropping the explicit std::initializer_list<int> is not supported
-  // by absl::StatusOr or absl::optional.
-  auto status_or =
-      absl::implicit_cast<absl::StatusOr<std::vector<int>>>({{10, 20, 30}});
-  EXPECT_THAT(status_or, IsOkAndHolds(ElementsAre(10, 20, 30)));
-}
-
-TEST(StatusOr, UniquePtrImplicitConstruction) {
-  auto status_or = absl::implicit_cast<absl::StatusOr<std::unique_ptr<Base1>>>(
-      absl::make_unique<Derived>());
-  EXPECT_THAT(status_or, IsOkAndHolds(Ne(nullptr)));
-}
-
-TEST(StatusOr, NestedStatusOrCopyAndMoveConstructorTests) {
-  absl::StatusOr<absl::StatusOr<CopyDetector>> status_or = CopyDetector(10);
-  absl::StatusOr<absl::StatusOr<CopyDetector>> status_error =
-      absl::InvalidArgumentError("foo");
-  EXPECT_THAT(status_or,
-              IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, true, false))));
-  absl::StatusOr<absl::StatusOr<CopyDetector>> a = status_or;
-  EXPECT_THAT(a, IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, false, true))));
-  absl::StatusOr<absl::StatusOr<CopyDetector>> a_err = status_error;
-  EXPECT_THAT(a_err, Not(IsOk()));
-
-  const absl::StatusOr<absl::StatusOr<CopyDetector>>& cref = status_or;
-  absl::StatusOr<absl::StatusOr<CopyDetector>> b = cref;  // NOLINT
-  EXPECT_THAT(b, IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, false, true))));
-  const absl::StatusOr<absl::StatusOr<CopyDetector>>& cref_err = status_error;
-  absl::StatusOr<absl::StatusOr<CopyDetector>> b_err = cref_err;  // NOLINT
-  EXPECT_THAT(b_err, Not(IsOk()));
-
-  absl::StatusOr<absl::StatusOr<CopyDetector>> c = std::move(status_or);
-  EXPECT_THAT(c, IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, true, false))));
-  absl::StatusOr<absl::StatusOr<CopyDetector>> c_err = std::move(status_error);
-  EXPECT_THAT(c_err, Not(IsOk()));
-}
-
-TEST(StatusOr, NestedStatusOrCopyAndMoveAssignment) {
-  absl::StatusOr<absl::StatusOr<CopyDetector>> status_or = CopyDetector(10);
-  absl::StatusOr<absl::StatusOr<CopyDetector>> status_error =
-      absl::InvalidArgumentError("foo");
-  absl::StatusOr<absl::StatusOr<CopyDetector>> a;
-  a = status_or;
-  EXPECT_THAT(a, IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, false, true))));
-  a = status_error;
-  EXPECT_THAT(a, Not(IsOk()));
-
-  const absl::StatusOr<absl::StatusOr<CopyDetector>>& cref = status_or;
-  a = cref;
-  EXPECT_THAT(a, IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, false, true))));
-  const absl::StatusOr<absl::StatusOr<CopyDetector>>& cref_err = status_error;
-  a = cref_err;
-  EXPECT_THAT(a, Not(IsOk()));
-  a = std::move(status_or);
-  EXPECT_THAT(a, IsOkAndHolds(IsOkAndHolds(CopyDetectorHas(10, true, false))));
-  a = std::move(status_error);
-  EXPECT_THAT(a, Not(IsOk()));
-}
-
-struct Copyable {
-  Copyable() {}
-  Copyable(const Copyable&) {}
-  Copyable& operator=(const Copyable&) { return *this; }
-};
-
-struct MoveOnly {
-  MoveOnly() {}
-  MoveOnly(MoveOnly&&) {}
-  MoveOnly& operator=(MoveOnly&&) { return *this; }
-};
-
-struct NonMovable {
-  NonMovable() {}
-  NonMovable(const NonMovable&) = delete;
-  NonMovable(NonMovable&&) = delete;
-  NonMovable& operator=(const NonMovable&) = delete;
-  NonMovable& operator=(NonMovable&&) = delete;
-};
-
-TEST(StatusOr, CopyAndMoveAbility) {
-  EXPECT_TRUE(std::is_copy_constructible<Copyable>::value);
-  EXPECT_TRUE(std::is_copy_assignable<Copyable>::value);
-  EXPECT_TRUE(std::is_move_constructible<Copyable>::value);
-  EXPECT_TRUE(std::is_move_assignable<Copyable>::value);
-  EXPECT_FALSE(std::is_copy_constructible<MoveOnly>::value);
-  EXPECT_FALSE(std::is_copy_assignable<MoveOnly>::value);
-  EXPECT_TRUE(std::is_move_constructible<MoveOnly>::value);
-  EXPECT_TRUE(std::is_move_assignable<MoveOnly>::value);
-  EXPECT_FALSE(std::is_copy_constructible<NonMovable>::value);
-  EXPECT_FALSE(std::is_copy_assignable<NonMovable>::value);
-  EXPECT_FALSE(std::is_move_constructible<NonMovable>::value);
-  EXPECT_FALSE(std::is_move_assignable<NonMovable>::value);
-}
-
-TEST(StatusOr, StatusOrAnyCopyAndMoveConstructorTests) {
-  absl::StatusOr<absl::any> status_or = CopyDetector(10);
-  absl::StatusOr<absl::any> status_error = absl::InvalidArgumentError("foo");
-  EXPECT_THAT(
-      status_or,
-      IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, true, false))));
-  absl::StatusOr<absl::any> a = status_or;
-  EXPECT_THAT(
-      a, IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, false, true))));
-  absl::StatusOr<absl::any> a_err = status_error;
-  EXPECT_THAT(a_err, Not(IsOk()));
-
-  const absl::StatusOr<absl::any>& cref = status_or;
-  // No lint for no-change copy.
-  absl::StatusOr<absl::any> b = cref;  // NOLINT
-  EXPECT_THAT(
-      b, IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, false, true))));
-  const absl::StatusOr<absl::any>& cref_err = status_error;
-  // No lint for no-change copy.
-  absl::StatusOr<absl::any> b_err = cref_err;  // NOLINT
-  EXPECT_THAT(b_err, Not(IsOk()));
-
-  absl::StatusOr<absl::any> c = std::move(status_or);
-  EXPECT_THAT(
-      c, IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, true, false))));
-  absl::StatusOr<absl::any> c_err = std::move(status_error);
-  EXPECT_THAT(c_err, Not(IsOk()));
-}
-
-TEST(StatusOr, StatusOrAnyCopyAndMoveAssignment) {
-  absl::StatusOr<absl::any> status_or = CopyDetector(10);
-  absl::StatusOr<absl::any> status_error = absl::InvalidArgumentError("foo");
-  absl::StatusOr<absl::any> a;
-  a = status_or;
-  EXPECT_THAT(
-      a, IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, false, true))));
-  a = status_error;
-  EXPECT_THAT(a, Not(IsOk()));
-
-  const absl::StatusOr<absl::any>& cref = status_or;
-  a = cref;
-  EXPECT_THAT(
-      a, IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, false, true))));
-  const absl::StatusOr<absl::any>& cref_err = status_error;
-  a = cref_err;
-  EXPECT_THAT(a, Not(IsOk()));
-  a = std::move(status_or);
-  EXPECT_THAT(
-      a, IsOkAndHolds(AnyWith<CopyDetector>(CopyDetectorHas(10, true, false))));
-  a = std::move(status_error);
-  EXPECT_THAT(a, Not(IsOk()));
-}
-
-TEST(StatusOr, StatusOrCopyAndMoveTestsConstructor) {
-  absl::StatusOr<CopyDetector> status_or(10);
-  ASSERT_THAT(status_or, IsOkAndHolds(CopyDetectorHas(10, false, false)));
-  absl::StatusOr<CopyDetector> a(status_or);
-  EXPECT_THAT(a, IsOkAndHolds(CopyDetectorHas(10, false, true)));
-  const absl::StatusOr<CopyDetector>& cref = status_or;
-  absl::StatusOr<CopyDetector> b(cref);  // NOLINT
-  EXPECT_THAT(b, IsOkAndHolds(CopyDetectorHas(10, false, true)));
-  absl::StatusOr<CopyDetector> c(std::move(status_or));
-  EXPECT_THAT(c, IsOkAndHolds(CopyDetectorHas(10, true, false)));
-}
-
-TEST(StatusOr, StatusOrCopyAndMoveTestsAssignment) {
-  absl::StatusOr<CopyDetector> status_or(10);
-  ASSERT_THAT(status_or, IsOkAndHolds(CopyDetectorHas(10, false, false)));
-  absl::StatusOr<CopyDetector> a;
-  a = status_or;
-  EXPECT_THAT(a, IsOkAndHolds(CopyDetectorHas(10, false, true)));
-  const absl::StatusOr<CopyDetector>& cref = status_or;
-  absl::StatusOr<CopyDetector> b;
-  b = cref;
-  EXPECT_THAT(b, IsOkAndHolds(CopyDetectorHas(10, false, true)));
-  absl::StatusOr<CopyDetector> c;
-  c = std::move(status_or);
-  EXPECT_THAT(c, IsOkAndHolds(CopyDetectorHas(10, true, false)));
-}
-
-TEST(StatusOr, AbslAnyAssignment) {
-  EXPECT_FALSE((std::is_assignable<absl::StatusOr<absl::any>,
-                                   absl::StatusOr<int>>::value));
-  absl::StatusOr<absl::any> status_or;
-  status_or = absl::InvalidArgumentError("foo");
-  EXPECT_THAT(status_or, Not(IsOk()));
-}
-
-TEST(StatusOr, ImplicitAssignment) {
-  absl::StatusOr<absl::variant<int, std::string>> status_or;
-  status_or = 10;
-  EXPECT_THAT(status_or, IsOkAndHolds(VariantWith<int>(10)));
-}
-
-TEST(StatusOr, SelfDirectInitAssignment) {
-  absl::StatusOr<std::vector<int>> status_or = {{10, 20, 30}};
-  status_or = *status_or;
-  EXPECT_THAT(status_or, IsOkAndHolds(ElementsAre(10, 20, 30)));
-}
-
-TEST(StatusOr, ImplicitCastFromInitializerList) {
-  absl::StatusOr<std::vector<int>> status_or = {{10, 20, 30}};
-  EXPECT_THAT(status_or, IsOkAndHolds(ElementsAre(10, 20, 30)));
-}
-
-TEST(StatusOr, UniquePtrImplicitAssignment) {
-  absl::StatusOr<std::unique_ptr<Base1>> status_or;
-  status_or = absl::make_unique<Derived>();
-  EXPECT_THAT(status_or, IsOkAndHolds(Ne(nullptr)));
-}
-
-TEST(StatusOr, Pointer) {
-  struct A {};
-  struct B : public A {};
-  struct C : private A {};
-
-  EXPECT_TRUE((std::is_constructible<absl::StatusOr<A*>, B*>::value));
-  EXPECT_TRUE((std::is_convertible<B*, absl::StatusOr<A*>>::value));
-  EXPECT_FALSE((std::is_constructible<absl::StatusOr<A*>, C*>::value));
-  EXPECT_FALSE((std::is_convertible<C*, absl::StatusOr<A*>>::value));
-}
-
-TEST(StatusOr, TestAssignmentStatusNotOkConverting) {
-  // Copy assignment
-  {
-    const absl::Status expected = absl::CancelledError();
-    absl::StatusOr<int> source(expected);
-
-    absl::StatusOr<double> target;
-    target = source;
-
-    EXPECT_FALSE(target.ok());
-    EXPECT_EQ(expected, target.status());
-
-    EXPECT_FALSE(source.ok());
-    EXPECT_EQ(expected, source.status());
-  }
-
-  // Move assignment
-  {
-    const absl::Status expected = absl::CancelledError();
-    absl::StatusOr<int> source(expected);
-
-    absl::StatusOr<double> target;
-    target = std::move(source);
-
-    EXPECT_FALSE(target.ok());
-    EXPECT_EQ(expected, target.status());
-
-    EXPECT_FALSE(source.ok());
-    EXPECT_EQ(source.status().code(), absl::StatusCode::kInternal);
-  }
-}
-
-TEST(StatusOr, SelfAssignment) {
-  // Copy-assignment, status OK
-  {
-    // A string long enough that it's likely to defeat any inline representation
-    // optimization.
-    const std::string long_str(128, 'a');
-
-    absl::StatusOr<std::string> so = long_str;
-    so = *&so;
-
-    ASSERT_TRUE(so.ok());
-    EXPECT_OK(so.status());
-    EXPECT_EQ(long_str, *so);
-  }
-
-  // Copy-assignment, error status
-  {
-    absl::StatusOr<int> so = absl::NotFoundError("taco");
-    so = *&so;
-
-    EXPECT_FALSE(so.ok());
-    EXPECT_EQ(so.status().code(), absl::StatusCode::kNotFound);
-    EXPECT_EQ(so.status().message(), "taco");
-  }
-
-  // Move-assignment with copyable type, status OK
-  {
-    absl::StatusOr<int> so = 17;
-
-    // Fool the compiler, which otherwise complains.
-    auto& same = so;
-    so = std::move(same);
-
-    ASSERT_TRUE(so.ok());
-    EXPECT_OK(so.status());
-    EXPECT_EQ(17, *so);
-  }
-
-  // Move-assignment with copyable type, error status
-  {
-    absl::StatusOr<int> so = absl::NotFoundError("taco");
-
-    // Fool the compiler, which otherwise complains.
-    auto& same = so;
-    so = std::move(same);
-
-    EXPECT_FALSE(so.ok());
-    EXPECT_EQ(so.status().code(), absl::StatusCode::kNotFound);
-    EXPECT_EQ(so.status().message(), "taco");
-  }
-
-  // Move-assignment with non-copyable type, status OK
-  {
-    const auto raw = new int(17);
-    absl::StatusOr<std::unique_ptr<int>> so = absl::WrapUnique(raw);
-
-    // Fool the compiler, which otherwise complains.
-    auto& same = so;
-    so = std::move(same);
-
-    ASSERT_TRUE(so.ok());
-    EXPECT_OK(so.status());
-    EXPECT_EQ(raw, so->get());
-  }
-
-  // Move-assignment with non-copyable type, error status
-  {
-    absl::StatusOr<std::unique_ptr<int>> so = absl::NotFoundError("taco");
-
-    // Fool the compiler, which otherwise complains.
-    auto& same = so;
-    so = std::move(same);
-
-    EXPECT_FALSE(so.ok());
-    EXPECT_EQ(so.status().code(), absl::StatusCode::kNotFound);
-    EXPECT_EQ(so.status().message(), "taco");
-  }
-}
-
-// These types form the overload sets of the constructors and the assignment
-// operators of `MockValue`. They distinguish construction from assignment,
-// lvalue from rvalue.
-struct FromConstructibleAssignableLvalue {};
-struct FromConstructibleAssignableRvalue {};
-struct FromImplicitConstructibleOnly {};
-struct FromAssignableOnly {};
-
-// This class is for testing the forwarding value assignments of `StatusOr`.
-// `from_rvalue` indicates whether the constructor or the assignment taking
-// rvalue reference is called. `from_assignment` indicates whether any
-// assignment is called.
-struct MockValue {
-  // Constructs `MockValue` from `FromConstructibleAssignableLvalue`.
-  MockValue(const FromConstructibleAssignableLvalue&)  // NOLINT
-      : from_rvalue(false), assigned(false) {}
-  // Constructs `MockValue` from `FromConstructibleAssignableRvalue`.
-  MockValue(FromConstructibleAssignableRvalue&&)  // NOLINT
-      : from_rvalue(true), assigned(false) {}
-  // Constructs `MockValue` from `FromImplicitConstructibleOnly`.
-  // `MockValue` is not assignable from `FromImplicitConstructibleOnly`.
-  MockValue(const FromImplicitConstructibleOnly&)  // NOLINT
-      : from_rvalue(false), assigned(false) {}
-  // Assigns `FromConstructibleAssignableLvalue`.
-  MockValue& operator=(const FromConstructibleAssignableLvalue&) {
-    from_rvalue = false;
-    assigned = true;
-    return *this;
-  }
-  // Assigns `FromConstructibleAssignableRvalue` (rvalue only).
-  MockValue& operator=(FromConstructibleAssignableRvalue&&) {
-    from_rvalue = true;
-    assigned = true;
-    return *this;
-  }
-  // Assigns `FromAssignableOnly`, but not constructible from
-  // `FromAssignableOnly`.
-  MockValue& operator=(const FromAssignableOnly&) {
-    from_rvalue = false;
-    assigned = true;
-    return *this;
-  }
-  bool from_rvalue;
-  bool assigned;
-};
-
-// operator=(U&&)
-TEST(StatusOr, PerfectForwardingAssignment) {
-  // U == T
-  constexpr int kValue1 = 10, kValue2 = 20;
-  absl::StatusOr<CopyDetector> status_or;
-  CopyDetector lvalue(kValue1);
-  status_or = lvalue;
-  EXPECT_THAT(status_or, IsOkAndHolds(CopyDetectorHas(kValue1, false, true)));
-  status_or = CopyDetector(kValue2);
-  EXPECT_THAT(status_or, IsOkAndHolds(CopyDetectorHas(kValue2, true, false)));
-
-  // U != T
-  EXPECT_TRUE(
-      (std::is_assignable<absl::StatusOr<MockValue>&,
-                          const FromConstructibleAssignableLvalue&>::value));
-  EXPECT_TRUE((std::is_assignable<absl::StatusOr<MockValue>&,
-                                  FromConstructibleAssignableLvalue&&>::value));
-  EXPECT_FALSE(
-      (std::is_assignable<absl::StatusOr<MockValue>&,
-                          const FromConstructibleAssignableRvalue&>::value));
-  EXPECT_TRUE((std::is_assignable<absl::StatusOr<MockValue>&,
-                                  FromConstructibleAssignableRvalue&&>::value));
-  EXPECT_TRUE(
-      (std::is_assignable<absl::StatusOr<MockValue>&,
-                          const FromImplicitConstructibleOnly&>::value));
-  EXPECT_FALSE((std::is_assignable<absl::StatusOr<MockValue>&,
-                                   const FromAssignableOnly&>::value));
-
-  absl::StatusOr<MockValue> from_lvalue(FromConstructibleAssignableLvalue{});
-  EXPECT_FALSE(from_lvalue->from_rvalue);
-  EXPECT_FALSE(from_lvalue->assigned);
-  from_lvalue = FromConstructibleAssignableLvalue{};
-  EXPECT_FALSE(from_lvalue->from_rvalue);
-  EXPECT_TRUE(from_lvalue->assigned);
-
-  absl::StatusOr<MockValue> from_rvalue(FromConstructibleAssignableRvalue{});
-  EXPECT_TRUE(from_rvalue->from_rvalue);
-  EXPECT_FALSE(from_rvalue->assigned);
-  from_rvalue = FromConstructibleAssignableRvalue{};
-  EXPECT_TRUE(from_rvalue->from_rvalue);
-  EXPECT_TRUE(from_rvalue->assigned);
-
-  absl::StatusOr<MockValue> from_implicit_constructible(
-      FromImplicitConstructibleOnly{});
-  EXPECT_FALSE(from_implicit_constructible->from_rvalue);
-  EXPECT_FALSE(from_implicit_constructible->assigned);
-  // construct a temporary `StatusOr` object and invoke the `StatusOr` move
-  // assignment operator.
-  from_implicit_constructible = FromImplicitConstructibleOnly{};
-  EXPECT_FALSE(from_implicit_constructible->from_rvalue);
-  EXPECT_FALSE(from_implicit_constructible->assigned);
-}
-
-TEST(StatusOr, TestStatus) {
-  absl::StatusOr<int> good(4);
-  EXPECT_TRUE(good.ok());
-  absl::StatusOr<int> bad(absl::CancelledError());
-  EXPECT_FALSE(bad.ok());
-  EXPECT_EQ(bad.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, OperatorStarRefQualifiers) {
-  static_assert(
-      std::is_same<const int&,
-                   decltype(*std::declval<const absl::StatusOr<int>&>())>(),
-      "Unexpected ref-qualifiers");
-  static_assert(
-      std::is_same<int&, decltype(*std::declval<absl::StatusOr<int>&>())>(),
-      "Unexpected ref-qualifiers");
-  static_assert(
-      std::is_same<const int&&,
-                   decltype(*std::declval<const absl::StatusOr<int>&&>())>(),
-      "Unexpected ref-qualifiers");
-  static_assert(
-      std::is_same<int&&, decltype(*std::declval<absl::StatusOr<int>&&>())>(),
-      "Unexpected ref-qualifiers");
-}
-
-TEST(StatusOr, OperatorStar) {
-  const absl::StatusOr<std::string> const_lvalue("hello");
-  EXPECT_EQ("hello", *const_lvalue);
-
-  absl::StatusOr<std::string> lvalue("hello");
-  EXPECT_EQ("hello", *lvalue);
-
-  // Note: Recall that std::move() is equivalent to a static_cast to an rvalue
-  // reference type.
-  const absl::StatusOr<std::string> const_rvalue("hello");
-  EXPECT_EQ("hello", *std::move(const_rvalue));  // NOLINT
-
-  absl::StatusOr<std::string> rvalue("hello");
-  EXPECT_EQ("hello", *std::move(rvalue));
-}
-
-TEST(StatusOr, OperatorArrowQualifiers) {
-  static_assert(
-      std::is_same<
-          const int*,
-          decltype(std::declval<const absl::StatusOr<int>&>().operator->())>(),
-      "Unexpected qualifiers");
-  static_assert(
-      std::is_same<
-          int*, decltype(std::declval<absl::StatusOr<int>&>().operator->())>(),
-      "Unexpected qualifiers");
-  static_assert(
-      std::is_same<
-          const int*,
-          decltype(std::declval<const absl::StatusOr<int>&&>().operator->())>(),
-      "Unexpected qualifiers");
-  static_assert(
-      std::is_same<
-          int*, decltype(std::declval<absl::StatusOr<int>&&>().operator->())>(),
-      "Unexpected qualifiers");
-}
-
-TEST(StatusOr, OperatorArrow) {
-  const absl::StatusOr<std::string> const_lvalue("hello");
-  EXPECT_EQ(std::string("hello"), const_lvalue->c_str());
-
-  absl::StatusOr<std::string> lvalue("hello");
-  EXPECT_EQ(std::string("hello"), lvalue->c_str());
-}
-
-TEST(StatusOr, RValueStatus) {
-  absl::StatusOr<int> so(absl::NotFoundError("taco"));
-  const absl::Status s = std::move(so).status();
-
-  EXPECT_EQ(s.code(), absl::StatusCode::kNotFound);
-  EXPECT_EQ(s.message(), "taco");
-
-  // Check that !ok() still implies !status().ok(), even after moving out of the
-  // object. See the note on the rvalue ref-qualified status method.
-  EXPECT_FALSE(so.ok());  // NOLINT
-  EXPECT_FALSE(so.status().ok());
-  EXPECT_EQ(so.status().code(), absl::StatusCode::kInternal);
-  EXPECT_EQ(so.status().message(), "Status accessed after move.");
-}
-
-TEST(StatusOr, TestValue) {
-  const int kI = 4;
-  absl::StatusOr<int> thing(kI);
-  EXPECT_EQ(kI, *thing);
-}
-
-TEST(StatusOr, TestValueConst) {
-  const int kI = 4;
-  const absl::StatusOr<int> thing(kI);
-  EXPECT_EQ(kI, *thing);
-}
-
-TEST(StatusOr, TestPointerDefaultCtor) {
-  absl::StatusOr<int*> thing;
-  EXPECT_FALSE(thing.ok());
-  EXPECT_EQ(thing.status().code(), absl::StatusCode::kUnknown);
-}
-
-
-
-TEST(StatusOr, TestPointerStatusCtor) {
-  absl::StatusOr<int*> thing(absl::CancelledError());
-  EXPECT_FALSE(thing.ok());
-  EXPECT_EQ(thing.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, TestPointerValueCtor) {
-  const int kI = 4;
-
-  // Construction from a non-null pointer
-  {
-    absl::StatusOr<const int*> so(&kI);
-    EXPECT_TRUE(so.ok());
-    EXPECT_OK(so.status());
-    EXPECT_EQ(&kI, *so);
-  }
-
-  // Construction from a null pointer constant
-  {
-    absl::StatusOr<const int*> so(nullptr);
-    EXPECT_TRUE(so.ok());
-    EXPECT_OK(so.status());
-    EXPECT_EQ(nullptr, *so);
-  }
-
-  // Construction from a non-literal null pointer
-  {
-    const int* const p = nullptr;
-
-    absl::StatusOr<const int*> so(p);
-    EXPECT_TRUE(so.ok());
-    EXPECT_OK(so.status());
-    EXPECT_EQ(nullptr, *so);
-  }
-}
-
-TEST(StatusOr, TestPointerCopyCtorStatusOk) {
-  const int kI = 0;
-  absl::StatusOr<const int*> original(&kI);
-  absl::StatusOr<const int*> copy(original);
-  EXPECT_OK(copy.status());
-  EXPECT_EQ(*original, *copy);
-}
-
-TEST(StatusOr, TestPointerCopyCtorStatusNotOk) {
-  absl::StatusOr<int*> original(absl::CancelledError());
-  absl::StatusOr<int*> copy(original);
-  EXPECT_EQ(copy.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, TestPointerCopyCtorStatusOKConverting) {
-  Derived derived;
-  absl::StatusOr<Derived*> original(&derived);
-  absl::StatusOr<Base2*> copy(original);
-  EXPECT_OK(copy.status());
-  EXPECT_EQ(static_cast<const Base2*>(*original), *copy);
-}
-
-TEST(StatusOr, TestPointerCopyCtorStatusNotOkConverting) {
-  absl::StatusOr<Derived*> original(absl::CancelledError());
-  absl::StatusOr<Base2*> copy(original);
-  EXPECT_EQ(copy.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, TestPointerAssignmentStatusOk) {
-  const int kI = 0;
-  absl::StatusOr<const int*> source(&kI);
-  absl::StatusOr<const int*> target;
-  target = source;
-  EXPECT_OK(target.status());
-  EXPECT_EQ(*source, *target);
-}
-
-TEST(StatusOr, TestPointerAssignmentStatusNotOk) {
-  absl::StatusOr<int*> source(absl::CancelledError());
-  absl::StatusOr<int*> target;
-  target = source;
-  EXPECT_EQ(target.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, TestPointerAssignmentStatusOKConverting) {
-  Derived derived;
-  absl::StatusOr<Derived*> source(&derived);
-  absl::StatusOr<Base2*> target;
-  target = source;
-  EXPECT_OK(target.status());
-  EXPECT_EQ(static_cast<const Base2*>(*source), *target);
-}
-
-TEST(StatusOr, TestPointerAssignmentStatusNotOkConverting) {
-  absl::StatusOr<Derived*> source(absl::CancelledError());
-  absl::StatusOr<Base2*> target;
-  target = source;
-  EXPECT_EQ(target.status(), source.status());
-}
-
-TEST(StatusOr, TestPointerStatus) {
-  const int kI = 0;
-  absl::StatusOr<const int*> good(&kI);
-  EXPECT_TRUE(good.ok());
-  absl::StatusOr<const int*> bad(absl::CancelledError());
-  EXPECT_EQ(bad.status().code(), absl::StatusCode::kCancelled);
-}
-
-TEST(StatusOr, TestPointerValue) {
-  const int kI = 0;
-  absl::StatusOr<const int*> thing(&kI);
-  EXPECT_EQ(&kI, *thing);
-}
-
-TEST(StatusOr, TestPointerValueConst) {
-  const int kI = 0;
-  const absl::StatusOr<const int*> thing(&kI);
-  EXPECT_EQ(&kI, *thing);
-}
-
-TEST(StatusOr, StatusOrVectorOfUniquePointerCanReserveAndResize) {
-  using EvilType = std::vector<std::unique_ptr<int>>;
-  static_assert(std::is_copy_constructible<EvilType>::value, "");
-  std::vector<::absl::StatusOr<EvilType>> v(5);
-  v.reserve(v.capacity() + 10);
-  v.resize(v.capacity() + 10);
-}
-
-TEST(StatusOr, ConstPayload) {
-  // A reduced version of a problematic type found in the wild. All of the
-  // operations below should compile.
-  absl::StatusOr<const int> a;
-
-  // Copy-construction
-  absl::StatusOr<const int> b(a);
-
-  // Copy-assignment
-  EXPECT_FALSE(std::is_copy_assignable<absl::StatusOr<const int>>::value);
-
-  // Move-construction
-  absl::StatusOr<const int> c(std::move(a));
-
-  // Move-assignment
-  EXPECT_FALSE(std::is_move_assignable<absl::StatusOr<const int>>::value);
-}
-
-TEST(StatusOr, MapToStatusOrUniquePtr) {
-  // A reduced version of a problematic type found in the wild. All of the
-  // operations below should compile.
-  using MapType = std::map<std::string, absl::StatusOr<std::unique_ptr<int>>>;
-
-  MapType a;
-
-  // Move-construction
-  MapType b(std::move(a));
-
-  // Move-assignment
-  a = std::move(b);
-}
-
-TEST(StatusOr, ValueOrOk) {
-  const absl::StatusOr<int> status_or = 0;
-  EXPECT_EQ(status_or.value_or(-1), 0);
-}
-
-TEST(StatusOr, ValueOrDefault) {
-  const absl::StatusOr<int> status_or = absl::CancelledError();
-  EXPECT_EQ(status_or.value_or(-1), -1);
-}
-
-TEST(StatusOr, MoveOnlyValueOrOk) {
-  EXPECT_THAT(absl::StatusOr<std::unique_ptr<int>>(absl::make_unique<int>(0))
-                  .value_or(absl::make_unique<int>(-1)),
-              Pointee(0));
-}
-
-TEST(StatusOr, MoveOnlyValueOrDefault) {
-  EXPECT_THAT(absl::StatusOr<std::unique_ptr<int>>(absl::CancelledError())
-                  .value_or(absl::make_unique<int>(-1)),
-              Pointee(-1));
-}
-
-static absl::StatusOr<int> MakeStatus() { return 100; }
-
-TEST(StatusOr, TestIgnoreError) { MakeStatus().IgnoreError(); }
-
-TEST(StatusOr, EqualityOperator) {
-  constexpr int kNumCases = 4;
-  std::array<absl::StatusOr<int>, kNumCases> group1 = {
-      absl::StatusOr<int>(1), absl::StatusOr<int>(2),
-      absl::StatusOr<int>(absl::InvalidArgumentError("msg")),
-      absl::StatusOr<int>(absl::InternalError("msg"))};
-  std::array<absl::StatusOr<int>, kNumCases> group2 = {
-      absl::StatusOr<int>(1), absl::StatusOr<int>(2),
-      absl::StatusOr<int>(absl::InvalidArgumentError("msg")),
-      absl::StatusOr<int>(absl::InternalError("msg"))};
-  for (int i = 0; i < kNumCases; ++i) {
-    for (int j = 0; j < kNumCases; ++j) {
-      if (i == j) {
-        EXPECT_TRUE(group1[i] == group2[j]);
-        EXPECT_FALSE(group1[i] != group2[j]);
-      } else {
-        EXPECT_FALSE(group1[i] == group2[j]);
-        EXPECT_TRUE(group1[i] != group2[j]);
-      }
-    }
-  }
-}
-
-struct MyType {
-  bool operator==(const MyType&) const { return true; }
-};
-
-enum class ConvTraits { kNone = 0, kImplicit = 1, kExplicit = 2 };
-
-// This class has conversion operator to `StatusOr<T>` based on value of
-// `conv_traits`.
-template <typename T, ConvTraits conv_traits = ConvTraits::kNone>
-struct StatusOrConversionBase {};
-
-template <typename T>
-struct StatusOrConversionBase<T, ConvTraits::kImplicit> {
-  operator absl::StatusOr<T>() const& {  // NOLINT
-    return absl::InvalidArgumentError("conversion to absl::StatusOr");
-  }
-  operator absl::StatusOr<T>() && {  // NOLINT
-    return absl::InvalidArgumentError("conversion to absl::StatusOr");
-  }
-};
-
-template <typename T>
-struct StatusOrConversionBase<T, ConvTraits::kExplicit> {
-  explicit operator absl::StatusOr<T>() const& {
-    return absl::InvalidArgumentError("conversion to absl::StatusOr");
-  }
-  explicit operator absl::StatusOr<T>() && {
-    return absl::InvalidArgumentError("conversion to absl::StatusOr");
-  }
-};
-
-// This class has conversion operator to `T` based on the value of
-// `conv_traits`.
-template <typename T, ConvTraits conv_traits = ConvTraits::kNone>
-struct ConversionBase {};
-
-template <typename T>
-struct ConversionBase<T, ConvTraits::kImplicit> {
-  operator T() const& { return t; }         // NOLINT
-  operator T() && { return std::move(t); }  // NOLINT
-  T t;
-};
-
-template <typename T>
-struct ConversionBase<T, ConvTraits::kExplicit> {
-  explicit operator T() const& { return t; }
-  explicit operator T() && { return std::move(t); }
-  T t;
-};
-
-// This class has conversion operator to `absl::Status` based on the value of
-// `conv_traits`.
-template <ConvTraits conv_traits = ConvTraits::kNone>
-struct StatusConversionBase {};
-
-template <>
-struct StatusConversionBase<ConvTraits::kImplicit> {
-  operator absl::Status() const& {  // NOLINT
-    return absl::InternalError("conversion to Status");
-  }
-  operator absl::Status() && {  // NOLINT
-    return absl::InternalError("conversion to Status");
-  }
-};
-
-template <>
-struct StatusConversionBase<ConvTraits::kExplicit> {
-  explicit operator absl::Status() const& {  // NOLINT
-    return absl::InternalError("conversion to Status");
-  }
-  explicit operator absl::Status() && {  // NOLINT
-    return absl::InternalError("conversion to Status");
-  }
-};
-
-static constexpr int kConvToStatus = 1;
-static constexpr int kConvToStatusOr = 2;
-static constexpr int kConvToT = 4;
-static constexpr int kConvExplicit = 8;
-
-constexpr ConvTraits GetConvTraits(int bit, int config) {
-  return (config & bit) == 0
-             ? ConvTraits::kNone
-             : ((config & kConvExplicit) == 0 ? ConvTraits::kImplicit
-                                              : ConvTraits::kExplicit);
-}
-
-// This class conditionally has conversion operator to `absl::Status`, `T`,
-// `StatusOr<T>`, based on values of the template parameters.
-template <typename T, int config>
-struct CustomType
-    : StatusOrConversionBase<T, GetConvTraits(kConvToStatusOr, config)>,
-      ConversionBase<T, GetConvTraits(kConvToT, config)>,
-      StatusConversionBase<GetConvTraits(kConvToStatus, config)> {};
-
-struct ConvertibleToAnyStatusOr {
-  template <typename T>
-  operator absl::StatusOr<T>() const {  // NOLINT
-    return absl::InvalidArgumentError("Conversion to absl::StatusOr");
-  }
-};
-
-// Test the rank of overload resolution for `StatusOr<T>` constructor and
-// assignment, from highest to lowest:
-// 1. T/Status
-// 2. U that has conversion operator to absl::StatusOr<T>
-// 3. U that is convertible to Status
-// 4. U that is convertible to T
-TEST(StatusOr, ConstructionFromT) {
-  // Construct absl::StatusOr<T> from T when T is convertible to
-  // absl::StatusOr<T>
-  {
-    ConvertibleToAnyStatusOr v;
-    absl::StatusOr<ConvertibleToAnyStatusOr> statusor(v);
-    EXPECT_TRUE(statusor.ok());
-  }
-  {
-    ConvertibleToAnyStatusOr v;
-    absl::StatusOr<ConvertibleToAnyStatusOr> statusor = v;
-    EXPECT_TRUE(statusor.ok());
-  }
-  // Construct absl::StatusOr<T> from T when T is explicitly convertible to
-  // Status
-  {
-    CustomType<MyType, kConvToStatus | kConvExplicit> v;
-    absl::StatusOr<CustomType<MyType, kConvToStatus | kConvExplicit>> statusor(
-        v);
-    EXPECT_TRUE(statusor.ok());
-  }
-  {
-    CustomType<MyType, kConvToStatus | kConvExplicit> v;
-    absl::StatusOr<CustomType<MyType, kConvToStatus | kConvExplicit>> statusor =
-        v;
-    EXPECT_TRUE(statusor.ok());
-  }
-}
-
-// Construct absl::StatusOr<T> from U when U is explicitly convertible to T
-TEST(StatusOr, ConstructionFromTypeConvertibleToT) {
-  {
-    CustomType<MyType, kConvToT | kConvExplicit> v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_TRUE(statusor.ok());
-  }
-  {
-    CustomType<MyType, kConvToT> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_TRUE(statusor.ok());
-  }
-}
-
-// Construct absl::StatusOr<T> from U when U has explicit conversion operator to
-// absl::StatusOr<T>
-TEST(StatusOr, ConstructionFromTypeWithConversionOperatorToStatusOrT) {
-  {
-    CustomType<MyType, kConvToStatusOr | kConvExplicit> v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatusOr | kConvExplicit> v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToStatusOr | kConvToStatus | kConvExplicit> v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType,
-               kConvToT | kConvToStatusOr | kConvToStatus | kConvExplicit>
-        v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToStatusOr> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatusOr> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToStatusOr | kConvToStatus> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatusOr | kConvToStatus> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-}
-
-TEST(StatusOr, ConstructionFromTypeConvertibleToStatus) {
-  // Construction fails because conversion to `Status` is explicit.
-  {
-    CustomType<MyType, kConvToStatus | kConvExplicit> v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_FALSE(statusor.ok());
-    EXPECT_EQ(statusor.status(), static_cast<absl::Status>(v));
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatus | kConvExplicit> v;
-    absl::StatusOr<MyType> statusor(v);
-    EXPECT_FALSE(statusor.ok());
-    EXPECT_EQ(statusor.status(), static_cast<absl::Status>(v));
-  }
-  {
-    CustomType<MyType, kConvToStatus> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_FALSE(statusor.ok());
-    EXPECT_EQ(statusor.status(), static_cast<absl::Status>(v));
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatus> v;
-    absl::StatusOr<MyType> statusor = v;
-    EXPECT_FALSE(statusor.ok());
-    EXPECT_EQ(statusor.status(), static_cast<absl::Status>(v));
-  }
-}
-
-TEST(StatusOr, AssignmentFromT) {
-  // Assign to absl::StatusOr<T> from T when T is convertible to
-  // absl::StatusOr<T>
-  {
-    ConvertibleToAnyStatusOr v;
-    absl::StatusOr<ConvertibleToAnyStatusOr> statusor;
-    statusor = v;
-    EXPECT_TRUE(statusor.ok());
-  }
-  // Assign to absl::StatusOr<T> from T when T is convertible to Status
-  {
-    CustomType<MyType, kConvToStatus> v;
-    absl::StatusOr<CustomType<MyType, kConvToStatus>> statusor;
-    statusor = v;
-    EXPECT_TRUE(statusor.ok());
-  }
-}
-
-TEST(StatusOr, AssignmentFromTypeConvertibleToT) {
-  // Assign to absl::StatusOr<T> from U when U is convertible to T
-  {
-    CustomType<MyType, kConvToT> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_TRUE(statusor.ok());
-  }
-}
-
-TEST(StatusOr, AssignmentFromTypeWithConversionOperatortoStatusOrT) {
-  // Assign to absl::StatusOr<T> from U when U has conversion operator to
-  // absl::StatusOr<T>
-  {
-    CustomType<MyType, kConvToStatusOr> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatusOr> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToStatusOr | kConvToStatus> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatusOr | kConvToStatus> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_EQ(statusor, v.operator absl::StatusOr<MyType>());
-  }
-}
-
-TEST(StatusOr, AssignmentFromTypeConvertibleToStatus) {
-  // Assign to absl::StatusOr<T> from U when U is convertible to Status
-  {
-    CustomType<MyType, kConvToStatus> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_FALSE(statusor.ok());
-    EXPECT_EQ(statusor.status(), static_cast<absl::Status>(v));
-  }
-  {
-    CustomType<MyType, kConvToT | kConvToStatus> v;
-    absl::StatusOr<MyType> statusor;
-    statusor = v;
-    EXPECT_FALSE(statusor.ok());
-    EXPECT_EQ(statusor.status(), static_cast<absl::Status>(v));
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/BUILD.bazel b/third_party/abseil/absl/strings/BUILD.bazel
deleted file mode 100644
index 12c9054..0000000
--- a/third_party/abseil/absl/strings/BUILD.bazel
+++ /dev/null
@@ -1,798 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(
-    default_visibility = ["//visibility:public"],
-    features = ["parse_headers"],
-)
-
-licenses(["notice"])
-
-cc_library(
-    name = "strings",
-    srcs = [
-        "ascii.cc",
-        "charconv.cc",
-        "escaping.cc",
-        "internal/charconv_bigint.cc",
-        "internal/charconv_bigint.h",
-        "internal/charconv_parse.cc",
-        "internal/charconv_parse.h",
-        "internal/memutil.cc",
-        "internal/memutil.h",
-        "internal/stl_type_traits.h",
-        "internal/str_join_internal.h",
-        "internal/str_split_internal.h",
-        "match.cc",
-        "numbers.cc",
-        "str_cat.cc",
-        "str_replace.cc",
-        "str_split.cc",
-        "string_view.cc",
-        "substitute.cc",
-    ],
-    hdrs = [
-        "ascii.h",
-        "charconv.h",
-        "escaping.h",
-        "internal/string_constant.h",
-        "match.h",
-        "numbers.h",
-        "str_cat.h",
-        "str_join.h",
-        "str_replace.h",
-        "str_split.h",
-        "string_view.h",
-        "strip.h",
-        "substitute.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS + ["-Wno-format-nonliteral"],
-    deps = [
-        ":internal",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/base:raw_logging_internal",
-        "//absl/base:throw_delegate",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/numeric:bits",
-        "//absl/numeric:int128",
-    ],
-)
-
-cc_library(
-    name = "internal",
-    srcs = [
-        "internal/escaping.cc",
-        "internal/ostringstream.cc",
-        "internal/utf8.cc",
-    ],
-    hdrs = [
-        "internal/char_map.h",
-        "internal/escaping.h",
-        "internal/ostringstream.h",
-        "internal/resize_uninitialized.h",
-        "internal/utf8.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/base:raw_logging_internal",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "match_test",
-    size = "small",
-    srcs = ["match_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "escaping_test",
-    size = "small",
-    srcs = [
-        "escaping_test.cc",
-        "internal/escaping_test_common.h",
-    ],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":cord",
-        ":strings",
-        "//absl/base:core_headers",
-        "//absl/container:fixed_array",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "escaping_benchmark",
-    srcs = [
-        "escaping_benchmark.cc",
-        "internal/escaping_test_common.h",
-    ],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:raw_logging_internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "ascii_test",
-    size = "small",
-    srcs = ["ascii_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "ascii_benchmark",
-    srcs = ["ascii_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "memutil_benchmark",
-    srcs = [
-        "internal/memutil.h",
-        "internal/memutil_benchmark.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "memutil_test",
-    size = "small",
-    srcs = [
-        "internal/memutil.h",
-        "internal/memutil_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "utf8_test",
-    size = "small",
-    srcs = [
-        "internal/utf8_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":internal",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "string_constant_test",
-    size = "small",
-    srcs = ["internal/string_constant_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "string_view_benchmark",
-    srcs = ["string_view_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "string_view_test",
-    size = "small",
-    srcs = ["string_view_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:dynamic_annotations",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "cord_internal",
-    srcs = [
-        "internal/cord_internal.cc",
-    ],
-    hdrs = [
-        "internal/cord_internal.h",
-        "internal/cord_rep_flat.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    visibility = [
-        "//visibility:private",
-    ],
-    deps = [
-        ":strings",
-        "//absl/base:base_internal",
-        "//absl/base:core_headers",
-        "//absl/container:compressed_tuple",
-        "//absl/container:inlined_vector",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_library(
-    name = "cord",
-    srcs = [
-        "cord.cc",
-    ],
-    hdrs = [
-        "cord.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        ":cord_internal",
-        ":internal",
-        ":str_format",
-        ":strings",
-        "//absl/base",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/base:raw_logging_internal",
-        "//absl/container:fixed_array",
-        "//absl/container:inlined_vector",
-        "//absl/functional:function_ref",
-        "//absl/meta:type_traits",
-        "//absl/types:optional",
-    ],
-)
-
-cc_library(
-    name = "cord_test_helpers",
-    testonly = 1,
-    hdrs = [
-        "cord_test_helpers.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        ":cord",
-    ],
-)
-
-cc_test(
-    name = "cord_test",
-    size = "medium",
-    srcs = ["cord_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":cord",
-        ":cord_test_helpers",
-        ":str_format",
-        ":strings",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:endian",
-        "//absl/base:raw_logging_internal",
-        "//absl/container:fixed_array",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "substitute_test",
-    size = "small",
-    srcs = ["substitute_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_replace_benchmark",
-    srcs = ["str_replace_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:raw_logging_internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "str_replace_test",
-    size = "small",
-    srcs = ["str_replace_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_split_test",
-    srcs = ["str_split_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "//absl/base:dynamic_annotations",
-        "//absl/container:flat_hash_map",
-        "//absl/container:node_hash_map",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_split_benchmark",
-    srcs = ["str_split_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:raw_logging_internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "ostringstream_test",
-    size = "small",
-    srcs = ["internal/ostringstream_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "ostringstream_benchmark",
-    srcs = ["internal/ostringstream_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "resize_uninitialized_test",
-    size = "small",
-    srcs = [
-        "internal/resize_uninitialized.h",
-        "internal/resize_uninitialized_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_join_test",
-    size = "small",
-    srcs = ["str_join_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_join_benchmark",
-    srcs = ["str_join_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "str_cat_test",
-    size = "small",
-    srcs = ["str_cat_test.cc"],
-    copts = ABSL_TEST_COPTS + ["-Wno-format-nonliteral"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_cat_benchmark",
-    srcs = ["str_cat_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "numbers_test",
-    size = "medium",
-    srcs = [
-        "internal/numbers_test_common.h",
-        "numbers_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":internal",
-        ":pow10_helper",
-        ":strings",
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-        "//absl/random",
-        "//absl/random:distributions",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "numbers_benchmark",
-    srcs = ["numbers_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:raw_logging_internal",
-        "//absl/random",
-        "//absl/random:distributions",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "strip_test",
-    size = "small",
-    srcs = ["strip_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "char_map_test",
-    srcs = ["internal/char_map_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "char_map_benchmark",
-    srcs = ["internal/char_map_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    tags = ["benchmark"],
-    deps = [
-        ":internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "charconv_test",
-    srcs = ["charconv_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":pow10_helper",
-        ":str_format",
-        ":strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "charconv_parse_test",
-    srcs = [
-        "internal/charconv_parse.h",
-        "internal/charconv_parse_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":strings",
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "charconv_bigint_test",
-    srcs = [
-        "internal/charconv_bigint.h",
-        "internal/charconv_bigint_test.cc",
-        "internal/charconv_parse.h",
-    ],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":strings",
-        "//absl/base:config",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "charconv_benchmark",
-    srcs = [
-        "charconv_benchmark.cc",
-    ],
-    tags = [
-        "benchmark",
-    ],
-    deps = [
-        ":strings",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "str_format",
-    hdrs = [
-        "str_format.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS + ["-Wno-format-nonliteral"],
-    deps = [
-        ":str_format_internal",
-    ],
-)
-
-cc_library(
-    name = "str_format_internal",
-    srcs = [
-        "internal/str_format/arg.cc",
-        "internal/str_format/bind.cc",
-        "internal/str_format/extension.cc",
-        "internal/str_format/float_conversion.cc",
-        "internal/str_format/output.cc",
-        "internal/str_format/parser.cc",
-    ],
-    hdrs = [
-        "internal/str_format/arg.h",
-        "internal/str_format/bind.h",
-        "internal/str_format/checker.h",
-        "internal/str_format/extension.h",
-        "internal/str_format/float_conversion.h",
-        "internal/str_format/output.h",
-        "internal/str_format/parser.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS + ["-Wno-format-nonliteral"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":strings",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/functional:function_ref",
-        "//absl/meta:type_traits",
-        "//absl/numeric:bits",
-        "//absl/numeric:int128",
-        "//absl/types:optional",
-        "//absl/types:span",
-    ],
-)
-
-cc_test(
-    name = "str_format_test",
-    srcs = ["str_format_test.cc"],
-    copts = ABSL_TEST_COPTS + ["-Wno-format-nonliteral"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":cord",
-        ":str_format",
-        ":strings",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_extension_test",
-    srcs = [
-        "internal/str_format/extension_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":str_format",
-        ":str_format_internal",
-        ":strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_arg_test",
-    srcs = ["internal/str_format/arg_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":str_format",
-        ":str_format_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_bind_test",
-    srcs = ["internal/str_format/bind_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":str_format_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_checker_test",
-    srcs = ["internal/str_format/checker_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_convert_test",
-    size = "medium",
-    srcs = ["internal/str_format/convert_test.cc"],
-    copts = ABSL_TEST_COPTS + ["-Wno-format-nonliteral"],
-    visibility = ["//visibility:private"],
-    deps = [
-        ":str_format_internal",
-        ":strings",
-        "//absl/base:raw_logging_internal",
-        "//absl/types:optional",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_output_test",
-    srcs = ["internal/str_format/output_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":cord",
-        ":str_format_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "str_format_parser_test",
-    srcs = ["internal/str_format/parser_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":str_format_internal",
-        "//absl/base:core_headers",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "pow10_helper",
-    testonly = True,
-    srcs = ["internal/pow10_helper.cc"],
-    hdrs = ["internal/pow10_helper.h"],
-    visibility = ["//visibility:private"],
-    deps = ["//absl/base:config"],
-)
-
-cc_test(
-    name = "pow10_helper_test",
-    srcs = ["internal/pow10_helper_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":pow10_helper",
-        ":str_format",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/strings/CMakeLists.txt b/third_party/abseil/absl/strings/CMakeLists.txt
deleted file mode 100644
index 654d0fd..0000000
--- a/third_party/abseil/absl/strings/CMakeLists.txt
+++ /dev/null
@@ -1,611 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    strings
-  HDRS
-    "ascii.h"
-    "charconv.h"
-    "escaping.h"
-    "internal/string_constant.h"
-    "match.h"
-    "numbers.h"
-    "str_cat.h"
-    "str_join.h"
-    "str_replace.h"
-    "str_split.h"
-    "string_view.h"
-    "strip.h"
-    "substitute.h"
-  SRCS
-    "ascii.cc"
-    "charconv.cc"
-    "escaping.cc"
-    "internal/charconv_bigint.cc"
-    "internal/charconv_bigint.h"
-    "internal/charconv_parse.cc"
-    "internal/charconv_parse.h"
-    "internal/memutil.cc"
-    "internal/memutil.h"
-    "internal/stl_type_traits.h"
-    "internal/str_join_internal.h"
-    "internal/str_split_internal.h"
-    "match.cc"
-    "numbers.cc"
-    "str_cat.cc"
-    "str_replace.cc"
-    "str_split.cc"
-    "string_view.cc"
-    "substitute.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::strings_internal
-    absl::base
-    absl::bits
-    absl::config
-    absl::core_headers
-    absl::endian
-    absl::int128
-    absl::memory
-    absl::raw_logging_internal
-    absl::throw_delegate
-    absl::type_traits
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    strings_internal
-  HDRS
-    "internal/char_map.h"
-    "internal/escaping.cc"
-    "internal/escaping.h"
-    "internal/ostringstream.h"
-    "internal/resize_uninitialized.h"
-    "internal/utf8.h"
-  SRCS
-    "internal/ostringstream.cc"
-    "internal/utf8.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::core_headers
-    absl::endian
-    absl::raw_logging_internal
-    absl::type_traits
-)
-
-absl_cc_test(
-  NAME
-    match_test
-  SRCS
-    "match_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::base
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    escaping_test
-  SRCS
-    "escaping_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::core_headers
-    absl::fixed_array
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    ascii_test
-  SRCS
-    "ascii_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    memutil_test
-  SRCS
-    "internal/memutil.h"
-    "internal/memutil_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    utf8_test
-  SRCS
-    "internal/utf8_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings_internal
-    absl::base
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    string_constant_test
-  SRCS
-    "internal/string_constant_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::type_traits
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    string_view_test
-  SRCS
-    "string_view_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::config
-    absl::core_headers
-    absl::dynamic_annotations
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    substitute_test
-  SRCS
-    "substitute_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_replace_test
-  SRCS
-    "str_replace_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_split_test
-  SRCS
-    "str_split_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::base
-    absl::core_headers
-    absl::dynamic_annotations
-    absl::flat_hash_map
-    absl::node_hash_map
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    ostringstream_test
-  SRCS
-    "internal/ostringstream_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings_internal
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    resize_uninitialized_test
-  SRCS
-    "internal/resize_uninitialized.h"
-    "internal/resize_uninitialized_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::core_headers
-    absl::type_traits
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_join_test
-  SRCS
-    "str_join_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::base
-    absl::core_headers
-    absl::memory
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_cat_test
-  SRCS
-    "str_cat_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    numbers_test
-  SRCS
-    "internal/numbers_test_common.h"
-    "numbers_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::core_headers
-    absl::pow10_helper
-    absl::config
-    absl::raw_logging_internal
-    absl::random_random
-    absl::random_distributions
-    absl::strings_internal
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    strip_test
-  SRCS
-    "strip_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::base
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    char_map_test
-  SRCS
-    "internal/char_map_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings_internal
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    charconv_test
-  SRCS
-    "charconv_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::str_format
-    absl::pow10_helper
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    charconv_parse_test
-  SRCS
-    "internal/charconv_parse.h"
-    "internal/charconv_parse_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::config
-    absl::raw_logging_internal
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    charconv_bigint_test
-  SRCS
-    "internal/charconv_bigint.h"
-    "internal/charconv_bigint_test.cc"
-    "internal/charconv_parse.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::config
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    str_format
-  HDRS
-    "str_format.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::str_format_internal
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    str_format_internal
-  HDRS
-    "internal/str_format/arg.h"
-    "internal/str_format/bind.h"
-    "internal/str_format/checker.h"
-    "internal/str_format/extension.h"
-    "internal/str_format/float_conversion.h"
-    "internal/str_format/output.h"
-    "internal/str_format/parser.h"
-  SRCS
-    "internal/str_format/arg.cc"
-    "internal/str_format/bind.cc"
-    "internal/str_format/extension.cc"
-    "internal/str_format/float_conversion.cc"
-    "internal/str_format/output.cc"
-    "internal/str_format/parser.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bits
-    absl::strings
-    absl::config
-    absl::core_headers
-    absl::type_traits
-    absl::int128
-    absl::span
-)
-
-absl_cc_test(
-  NAME
-    str_format_test
-  SRCS
-    "str_format_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format
-    absl::cord
-    absl::strings
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_extension_test
-  SRCS
-    "internal/str_format/extension_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format
-    absl::str_format_internal
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_arg_test
-  SRCS
-    "internal/str_format/arg_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format
-    absl::str_format_internal
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_bind_test
-  SRCS
-    "internal/str_format/bind_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format_internal
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_checker_test
-  SRCS
-    "internal/str_format/checker_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_convert_test
-  SRCS
-    "internal/str_format/convert_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::strings
-    absl::str_format_internal
-    absl::raw_logging_internal
-    absl::int128
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_output_test
-  SRCS
-    "internal/str_format/output_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format_internal
-    absl::cord
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    str_format_parser_test
-  SRCS
-    "internal/str_format/parser_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::str_format_internal
-    absl::core_headers
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    pow10_helper
-  HDRS
-    "internal/pow10_helper.h"
-  SRCS
-    "internal/pow10_helper.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::config
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    pow10_helper_test
-  SRCS
-    "internal/pow10_helper_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::pow10_helper
-    absl::str_format
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    cord
-  HDRS
-    "cord.h"
-  SRCS
-    "cord.cc"
-    "internal/cord_internal.cc"
-    "internal/cord_internal.h"
-    "internal/cord_rep_flat.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base
-    absl::base_internal
-    absl::compressed_tuple
-    absl::core_headers
-    absl::endian
-    absl::fixed_array
-    absl::function_ref
-    absl::inlined_vector
-    absl::optional
-    absl::raw_logging_internal
-    absl::strings
-    absl::strings_internal
-    absl::type_traits
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    cord_test_helpers
-  HDRS
-    "cord_test_helpers.h"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::cord
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    cord_test
-  SRCS
-    "cord_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::cord
-    absl::str_format
-    absl::strings
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::endian
-    absl::raw_logging_internal
-    absl::fixed_array
-    gmock_main
-)
diff --git a/third_party/abseil/absl/strings/ascii.cc b/third_party/abseil/absl/strings/ascii.cc
deleted file mode 100644
index 93bb03e..0000000
--- a/third_party/abseil/absl/strings/ascii.cc
+++ /dev/null
@@ -1,200 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/ascii.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace ascii_internal {
-
-// # Table generated by this Python code (bit 0x02 is currently unused):
-// TODO(mbar) Move Python code for generation of table to BUILD and link here.
-
-// NOTE: The kAsciiPropertyBits table used within this code was generated by
-// Python code of the following form. (Bit 0x02 is currently unused and
-// available.)
-//
-// def Hex2(n):
-//   return '0x' + hex(n/16)[2:] + hex(n%16)[2:]
-// def IsPunct(ch):
-//   return (ord(ch) >= 32 and ord(ch) < 127 and
-//           not ch.isspace() and not ch.isalnum())
-// def IsBlank(ch):
-//   return ch in ' \t'
-// def IsCntrl(ch):
-//   return ord(ch) < 32 or ord(ch) == 127
-// def IsXDigit(ch):
-//   return ch.isdigit() or ch.lower() in 'abcdef'
-// for i in range(128):
-//   ch = chr(i)
-//   mask = ((ch.isalpha() and 0x01 or 0) |
-//           (ch.isalnum() and 0x04 or 0) |
-//           (ch.isspace() and 0x08 or 0) |
-//           (IsPunct(ch) and 0x10 or 0) |
-//           (IsBlank(ch) and 0x20 or 0) |
-//           (IsCntrl(ch) and 0x40 or 0) |
-//           (IsXDigit(ch) and 0x80 or 0))
-//   print Hex2(mask) + ',',
-//   if i % 16 == 7:
-//     print ' //', Hex2(i & 0x78)
-//   elif i % 16 == 15:
-//     print
-
-// clang-format off
-// Array of bitfields holding character information. Each bit value corresponds
-// to a particular character feature. For readability, and because the value
-// of these bits is tightly coupled to this implementation, the individual bits
-// are not named. Note that bitfields for all characters above ASCII 127 are
-// zero-initialized.
-ABSL_DLL const unsigned char kPropertyBits[256] = {
-    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0x00
-    0x40, 0x68, 0x48, 0x48, 0x48, 0x48, 0x40, 0x40,
-    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,  // 0x10
-    0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
-    0x28, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,  // 0x20
-    0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
-    0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84,  // 0x30
-    0x84, 0x84, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
-    0x10, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x05,  // 0x40
-    0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
-    0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,  // 0x50
-    0x05, 0x05, 0x05, 0x10, 0x10, 0x10, 0x10, 0x10,
-    0x10, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x05,  // 0x60
-    0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
-    0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,  // 0x70
-    0x05, 0x05, 0x05, 0x10, 0x10, 0x10, 0x10, 0x40,
-};
-
-// Array of characters for the ascii_tolower() function. For values 'A'
-// through 'Z', return the lower-case character; otherwise, return the
-// identity of the passed character.
-ABSL_DLL const char kToLower[256] = {
-  '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
-  '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f',
-  '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17',
-  '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f',
-  '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27',
-  '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f',
-  '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37',
-  '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f',
-  '\x40',    'a',    'b',    'c',    'd',    'e',    'f',    'g',
-     'h',    'i',    'j',    'k',    'l',    'm',    'n',    'o',
-     'p',    'q',    'r',    's',    't',    'u',    'v',    'w',
-     'x',    'y',    'z', '\x5b', '\x5c', '\x5d', '\x5e', '\x5f',
-  '\x60', '\x61', '\x62', '\x63', '\x64', '\x65', '\x66', '\x67',
-  '\x68', '\x69', '\x6a', '\x6b', '\x6c', '\x6d', '\x6e', '\x6f',
-  '\x70', '\x71', '\x72', '\x73', '\x74', '\x75', '\x76', '\x77',
-  '\x78', '\x79', '\x7a', '\x7b', '\x7c', '\x7d', '\x7e', '\x7f',
-  '\x80', '\x81', '\x82', '\x83', '\x84', '\x85', '\x86', '\x87',
-  '\x88', '\x89', '\x8a', '\x8b', '\x8c', '\x8d', '\x8e', '\x8f',
-  '\x90', '\x91', '\x92', '\x93', '\x94', '\x95', '\x96', '\x97',
-  '\x98', '\x99', '\x9a', '\x9b', '\x9c', '\x9d', '\x9e', '\x9f',
-  '\xa0', '\xa1', '\xa2', '\xa3', '\xa4', '\xa5', '\xa6', '\xa7',
-  '\xa8', '\xa9', '\xaa', '\xab', '\xac', '\xad', '\xae', '\xaf',
-  '\xb0', '\xb1', '\xb2', '\xb3', '\xb4', '\xb5', '\xb6', '\xb7',
-  '\xb8', '\xb9', '\xba', '\xbb', '\xbc', '\xbd', '\xbe', '\xbf',
-  '\xc0', '\xc1', '\xc2', '\xc3', '\xc4', '\xc5', '\xc6', '\xc7',
-  '\xc8', '\xc9', '\xca', '\xcb', '\xcc', '\xcd', '\xce', '\xcf',
-  '\xd0', '\xd1', '\xd2', '\xd3', '\xd4', '\xd5', '\xd6', '\xd7',
-  '\xd8', '\xd9', '\xda', '\xdb', '\xdc', '\xdd', '\xde', '\xdf',
-  '\xe0', '\xe1', '\xe2', '\xe3', '\xe4', '\xe5', '\xe6', '\xe7',
-  '\xe8', '\xe9', '\xea', '\xeb', '\xec', '\xed', '\xee', '\xef',
-  '\xf0', '\xf1', '\xf2', '\xf3', '\xf4', '\xf5', '\xf6', '\xf7',
-  '\xf8', '\xf9', '\xfa', '\xfb', '\xfc', '\xfd', '\xfe', '\xff',
-};
-
-// Array of characters for the ascii_toupper() function. For values 'a'
-// through 'z', return the upper-case character; otherwise, return the
-// identity of the passed character.
-ABSL_DLL const char kToUpper[256] = {
-  '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
-  '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f',
-  '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17',
-  '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f',
-  '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27',
-  '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f',
-  '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37',
-  '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f',
-  '\x40', '\x41', '\x42', '\x43', '\x44', '\x45', '\x46', '\x47',
-  '\x48', '\x49', '\x4a', '\x4b', '\x4c', '\x4d', '\x4e', '\x4f',
-  '\x50', '\x51', '\x52', '\x53', '\x54', '\x55', '\x56', '\x57',
-  '\x58', '\x59', '\x5a', '\x5b', '\x5c', '\x5d', '\x5e', '\x5f',
-  '\x60',    'A',    'B',    'C',    'D',    'E',    'F',    'G',
-     'H',    'I',    'J',    'K',    'L',    'M',    'N',    'O',
-     'P',    'Q',    'R',    'S',    'T',    'U',    'V',    'W',
-     'X',    'Y',    'Z', '\x7b', '\x7c', '\x7d', '\x7e', '\x7f',
-  '\x80', '\x81', '\x82', '\x83', '\x84', '\x85', '\x86', '\x87',
-  '\x88', '\x89', '\x8a', '\x8b', '\x8c', '\x8d', '\x8e', '\x8f',
-  '\x90', '\x91', '\x92', '\x93', '\x94', '\x95', '\x96', '\x97',
-  '\x98', '\x99', '\x9a', '\x9b', '\x9c', '\x9d', '\x9e', '\x9f',
-  '\xa0', '\xa1', '\xa2', '\xa3', '\xa4', '\xa5', '\xa6', '\xa7',
-  '\xa8', '\xa9', '\xaa', '\xab', '\xac', '\xad', '\xae', '\xaf',
-  '\xb0', '\xb1', '\xb2', '\xb3', '\xb4', '\xb5', '\xb6', '\xb7',
-  '\xb8', '\xb9', '\xba', '\xbb', '\xbc', '\xbd', '\xbe', '\xbf',
-  '\xc0', '\xc1', '\xc2', '\xc3', '\xc4', '\xc5', '\xc6', '\xc7',
-  '\xc8', '\xc9', '\xca', '\xcb', '\xcc', '\xcd', '\xce', '\xcf',
-  '\xd0', '\xd1', '\xd2', '\xd3', '\xd4', '\xd5', '\xd6', '\xd7',
-  '\xd8', '\xd9', '\xda', '\xdb', '\xdc', '\xdd', '\xde', '\xdf',
-  '\xe0', '\xe1', '\xe2', '\xe3', '\xe4', '\xe5', '\xe6', '\xe7',
-  '\xe8', '\xe9', '\xea', '\xeb', '\xec', '\xed', '\xee', '\xef',
-  '\xf0', '\xf1', '\xf2', '\xf3', '\xf4', '\xf5', '\xf6', '\xf7',
-  '\xf8', '\xf9', '\xfa', '\xfb', '\xfc', '\xfd', '\xfe', '\xff',
-};
-// clang-format on
-
-}  // namespace ascii_internal
-
-void AsciiStrToLower(std::string* s) {
-  for (auto& ch : *s) {
-    ch = absl::ascii_tolower(ch);
-  }
-}
-
-void AsciiStrToUpper(std::string* s) {
-  for (auto& ch : *s) {
-    ch = absl::ascii_toupper(ch);
-  }
-}
-
-void RemoveExtraAsciiWhitespace(std::string* str) {
-  auto stripped = StripAsciiWhitespace(*str);
-
-  if (stripped.empty()) {
-    str->clear();
-    return;
-  }
-
-  auto input_it = stripped.begin();
-  auto input_end = stripped.end();
-  auto output_it = &(*str)[0];
-  bool is_ws = false;
-
-  for (; input_it < input_end; ++input_it) {
-    if (is_ws) {
-      // Consecutive whitespace?  Keep only the last.
-      is_ws = absl::ascii_isspace(*input_it);
-      if (is_ws) --output_it;
-    } else {
-      is_ws = absl::ascii_isspace(*input_it);
-    }
-
-    *output_it = *input_it;
-    ++output_it;
-  }
-
-  str->erase(output_it - &(*str)[0]);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/ascii.h b/third_party/abseil/absl/strings/ascii.h
deleted file mode 100644
index b46bc71..0000000
--- a/third_party/abseil/absl/strings/ascii.h
+++ /dev/null
@@ -1,242 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: ascii.h
-// -----------------------------------------------------------------------------
-//
-// This package contains functions operating on characters and strings
-// restricted to standard ASCII. These include character classification
-// functions analogous to those found in the ANSI C Standard Library <ctype.h>
-// header file.
-//
-// C++ implementations provide <ctype.h> functionality based on their
-// C environment locale. In general, reliance on such a locale is not ideal, as
-// the locale standard is problematic (and may not return invariant information
-// for the same character set, for example). These `ascii_*()` functions are
-// hard-wired for standard ASCII, much faster, and guaranteed to behave
-// consistently.  They will never be overloaded, nor will their function
-// signature change.
-//
-// `ascii_isalnum()`, `ascii_isalpha()`, `ascii_isascii()`, `ascii_isblank()`,
-// `ascii_iscntrl()`, `ascii_isdigit()`, `ascii_isgraph()`, `ascii_islower()`,
-// `ascii_isprint()`, `ascii_ispunct()`, `ascii_isspace()`, `ascii_isupper()`,
-// `ascii_isxdigit()`
-//   Analogous to the <ctype.h> functions with similar names, these
-//   functions take an unsigned char and return a bool, based on whether the
-//   character matches the condition specified.
-//
-//   If the input character has a numerical value greater than 127, these
-//   functions return `false`.
-//
-// `ascii_tolower()`, `ascii_toupper()`
-//   Analogous to the <ctype.h> functions with similar names, these functions
-//   take an unsigned char and return a char.
-//
-//   If the input character is not an ASCII {lower,upper}-case letter (including
-//   numerical values greater than 127) then the functions return the same value
-//   as the input character.
-
-#ifndef ABSL_STRINGS_ASCII_H_
-#define ABSL_STRINGS_ASCII_H_
-
-#include <algorithm>
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace ascii_internal {
-
-// Declaration for an array of bitfields holding character information.
-ABSL_DLL extern const unsigned char kPropertyBits[256];
-
-// Declaration for the array of characters to upper-case characters.
-ABSL_DLL extern const char kToUpper[256];
-
-// Declaration for the array of characters to lower-case characters.
-ABSL_DLL extern const char kToLower[256];
-
-}  // namespace ascii_internal
-
-// ascii_isalpha()
-//
-// Determines whether the given character is an alphabetic character.
-inline bool ascii_isalpha(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x01) != 0;
-}
-
-// ascii_isalnum()
-//
-// Determines whether the given character is an alphanumeric character.
-inline bool ascii_isalnum(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x04) != 0;
-}
-
-// ascii_isspace()
-//
-// Determines whether the given character is a whitespace character (space,
-// tab, vertical tab, formfeed, linefeed, or carriage return).
-inline bool ascii_isspace(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x08) != 0;
-}
-
-// ascii_ispunct()
-//
-// Determines whether the given character is a punctuation character.
-inline bool ascii_ispunct(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x10) != 0;
-}
-
-// ascii_isblank()
-//
-// Determines whether the given character is a blank character (tab or space).
-inline bool ascii_isblank(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x20) != 0;
-}
-
-// ascii_iscntrl()
-//
-// Determines whether the given character is a control character.
-inline bool ascii_iscntrl(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x40) != 0;
-}
-
-// ascii_isxdigit()
-//
-// Determines whether the given character can be represented as a hexadecimal
-// digit character (i.e. {0-9} or {A-F}).
-inline bool ascii_isxdigit(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x80) != 0;
-}
-
-// ascii_isdigit()
-//
-// Determines whether the given character can be represented as a decimal
-// digit character (i.e. {0-9}).
-inline bool ascii_isdigit(unsigned char c) { return c >= '0' && c <= '9'; }
-
-// ascii_isprint()
-//
-// Determines whether the given character is printable, including whitespace.
-inline bool ascii_isprint(unsigned char c) { return c >= 32 && c < 127; }
-
-// ascii_isgraph()
-//
-// Determines whether the given character has a graphical representation.
-inline bool ascii_isgraph(unsigned char c) { return c > 32 && c < 127; }
-
-// ascii_isupper()
-//
-// Determines whether the given character is uppercase.
-inline bool ascii_isupper(unsigned char c) { return c >= 'A' && c <= 'Z'; }
-
-// ascii_islower()
-//
-// Determines whether the given character is lowercase.
-inline bool ascii_islower(unsigned char c) { return c >= 'a' && c <= 'z'; }
-
-// ascii_isascii()
-//
-// Determines whether the given character is ASCII.
-inline bool ascii_isascii(unsigned char c) { return c < 128; }
-
-// ascii_tolower()
-//
-// Returns an ASCII character, converting to lowercase if uppercase is
-// passed. Note that character values > 127 are simply returned.
-inline char ascii_tolower(unsigned char c) {
-  return ascii_internal::kToLower[c];
-}
-
-// Converts the characters in `s` to lowercase, changing the contents of `s`.
-void AsciiStrToLower(std::string* s);
-
-// Creates a lowercase string from a given absl::string_view.
-ABSL_MUST_USE_RESULT inline std::string AsciiStrToLower(absl::string_view s) {
-  std::string result(s);
-  absl::AsciiStrToLower(&result);
-  return result;
-}
-
-// ascii_toupper()
-//
-// Returns the ASCII character, converting to upper-case if lower-case is
-// passed. Note that characters values > 127 are simply returned.
-inline char ascii_toupper(unsigned char c) {
-  return ascii_internal::kToUpper[c];
-}
-
-// Converts the characters in `s` to uppercase, changing the contents of `s`.
-void AsciiStrToUpper(std::string* s);
-
-// Creates an uppercase string from a given absl::string_view.
-ABSL_MUST_USE_RESULT inline std::string AsciiStrToUpper(absl::string_view s) {
-  std::string result(s);
-  absl::AsciiStrToUpper(&result);
-  return result;
-}
-
-// Returns absl::string_view with whitespace stripped from the beginning of the
-// given string_view.
-ABSL_MUST_USE_RESULT inline absl::string_view StripLeadingAsciiWhitespace(
-    absl::string_view str) {
-  auto it = std::find_if_not(str.begin(), str.end(), absl::ascii_isspace);
-  return str.substr(it - str.begin());
-}
-
-// Strips in place whitespace from the beginning of the given string.
-inline void StripLeadingAsciiWhitespace(std::string* str) {
-  auto it = std::find_if_not(str->begin(), str->end(), absl::ascii_isspace);
-  str->erase(str->begin(), it);
-}
-
-// Returns absl::string_view with whitespace stripped from the end of the given
-// string_view.
-ABSL_MUST_USE_RESULT inline absl::string_view StripTrailingAsciiWhitespace(
-    absl::string_view str) {
-  auto it = std::find_if_not(str.rbegin(), str.rend(), absl::ascii_isspace);
-  return str.substr(0, str.rend() - it);
-}
-
-// Strips in place whitespace from the end of the given string
-inline void StripTrailingAsciiWhitespace(std::string* str) {
-  auto it = std::find_if_not(str->rbegin(), str->rend(), absl::ascii_isspace);
-  str->erase(str->rend() - it);
-}
-
-// Returns absl::string_view with whitespace stripped from both ends of the
-// given string_view.
-ABSL_MUST_USE_RESULT inline absl::string_view StripAsciiWhitespace(
-    absl::string_view str) {
-  return StripTrailingAsciiWhitespace(StripLeadingAsciiWhitespace(str));
-}
-
-// Strips in place whitespace from both ends of the given string
-inline void StripAsciiWhitespace(std::string* str) {
-  StripTrailingAsciiWhitespace(str);
-  StripLeadingAsciiWhitespace(str);
-}
-
-// Removes leading, trailing, and consecutive internal whitespace.
-void RemoveExtraAsciiWhitespace(std::string*);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_ASCII_H_
diff --git a/third_party/abseil/absl/strings/ascii_benchmark.cc b/third_party/abseil/absl/strings/ascii_benchmark.cc
deleted file mode 100644
index aca458c..0000000
--- a/third_party/abseil/absl/strings/ascii_benchmark.cc
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/ascii.h"
-
-#include <cctype>
-#include <string>
-#include <array>
-#include <random>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-std::array<unsigned char, 256> MakeShuffledBytes() {
-  std::array<unsigned char, 256> bytes;
-  for (size_t i = 0; i < 256; ++i) bytes[i] = static_cast<unsigned char>(i);
-  std::random_device rd;
-  std::seed_seq seed({rd(), rd(), rd(), rd(), rd(), rd(), rd(), rd()});
-  std::mt19937 g(seed);
-  std::shuffle(bytes.begin(), bytes.end(), g);
-  return bytes;
-}
-
-template <typename Function>
-void AsciiBenchmark(benchmark::State& state, Function f) {
-  std::array<unsigned char, 256> bytes = MakeShuffledBytes();
-  size_t sum = 0;
-  for (auto _ : state) {
-    for (unsigned char b : bytes) sum += f(b) ? 1 : 0;
-  }
-  // Make a copy of `sum` before calling `DoNotOptimize` to make sure that `sum`
-  // can be put in a CPU register and not degrade performance in the loop above.
-  size_t sum2 = sum;
-  benchmark::DoNotOptimize(sum2);
-  state.SetBytesProcessed(state.iterations() * bytes.size());
-}
-
-using StdAsciiFunction = int (*)(int);
-template <StdAsciiFunction f>
-void BM_Ascii(benchmark::State& state) {
-  AsciiBenchmark(state, f);
-}
-
-using AbslAsciiIsFunction = bool (*)(unsigned char);
-template <AbslAsciiIsFunction f>
-void BM_Ascii(benchmark::State& state) {
-  AsciiBenchmark(state, f);
-}
-
-using AbslAsciiToFunction = char (*)(unsigned char);
-template <AbslAsciiToFunction f>
-void BM_Ascii(benchmark::State& state) {
-  AsciiBenchmark(state, f);
-}
-
-inline char Noop(unsigned char b) { return static_cast<char>(b); }
-
-BENCHMARK_TEMPLATE(BM_Ascii, Noop);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isalpha);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isalpha);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isdigit);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isdigit);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isalnum);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isalnum);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isspace);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isspace);
-BENCHMARK_TEMPLATE(BM_Ascii, std::ispunct);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_ispunct);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isblank);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isblank);
-BENCHMARK_TEMPLATE(BM_Ascii, std::iscntrl);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_iscntrl);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isxdigit);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isxdigit);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isprint);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isprint);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isgraph);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isgraph);
-BENCHMARK_TEMPLATE(BM_Ascii, std::isupper);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isupper);
-BENCHMARK_TEMPLATE(BM_Ascii, std::islower);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_islower);
-BENCHMARK_TEMPLATE(BM_Ascii, isascii);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_isascii);
-BENCHMARK_TEMPLATE(BM_Ascii, std::tolower);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_tolower);
-BENCHMARK_TEMPLATE(BM_Ascii, std::toupper);
-BENCHMARK_TEMPLATE(BM_Ascii, absl::ascii_toupper);
-
-static void BM_StrToLower(benchmark::State& state) {
-  const int size = state.range(0);
-  std::string s(size, 'X');
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::AsciiStrToLower(s));
-  }
-}
-BENCHMARK(BM_StrToLower)->Range(1, 1 << 20);
-
-static void BM_StrToUpper(benchmark::State& state) {
-  const int size = state.range(0);
-  std::string s(size, 'x');
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::AsciiStrToUpper(s));
-  }
-}
-BENCHMARK(BM_StrToUpper)->Range(1, 1 << 20);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/ascii_test.cc b/third_party/abseil/absl/strings/ascii_test.cc
deleted file mode 100644
index 5ecd23f..0000000
--- a/third_party/abseil/absl/strings/ascii_test.cc
+++ /dev/null
@@ -1,361 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/ascii.h"
-
-#include <cctype>
-#include <clocale>
-#include <cstring>
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-
-namespace {
-
-TEST(AsciiIsFoo, All) {
-  for (int i = 0; i < 256; i++) {
-    if ((i >= 'a' && i <= 'z') || (i >= 'A' && i <= 'Z'))
-      EXPECT_TRUE(absl::ascii_isalpha(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isalpha(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if ((i >= '0' && i <= '9'))
-      EXPECT_TRUE(absl::ascii_isdigit(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isdigit(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (absl::ascii_isalpha(i) || absl::ascii_isdigit(i))
-      EXPECT_TRUE(absl::ascii_isalnum(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isalnum(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i != '\0' && strchr(" \r\n\t\v\f", i))
-      EXPECT_TRUE(absl::ascii_isspace(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isspace(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i >= 32 && i < 127)
-      EXPECT_TRUE(absl::ascii_isprint(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isprint(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (absl::ascii_isprint(i) && !absl::ascii_isspace(i) &&
-        !absl::ascii_isalnum(i))
-      EXPECT_TRUE(absl::ascii_ispunct(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_ispunct(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i == ' ' || i == '\t')
-      EXPECT_TRUE(absl::ascii_isblank(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isblank(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i < 32 || i == 127)
-      EXPECT_TRUE(absl::ascii_iscntrl(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_iscntrl(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (absl::ascii_isdigit(i) || (i >= 'A' && i <= 'F') ||
-        (i >= 'a' && i <= 'f'))
-      EXPECT_TRUE(absl::ascii_isxdigit(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isxdigit(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i > 32 && i < 127)
-      EXPECT_TRUE(absl::ascii_isgraph(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isgraph(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i >= 'A' && i <= 'Z')
-      EXPECT_TRUE(absl::ascii_isupper(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_isupper(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 256; i++) {
-    if (i >= 'a' && i <= 'z')
-      EXPECT_TRUE(absl::ascii_islower(i)) << ": failed on " << i;
-    else
-      EXPECT_TRUE(!absl::ascii_islower(i)) << ": failed on " << i;
-  }
-  for (int i = 0; i < 128; i++) {
-    EXPECT_TRUE(absl::ascii_isascii(i)) << ": failed on " << i;
-  }
-  for (int i = 128; i < 256; i++) {
-    EXPECT_TRUE(!absl::ascii_isascii(i)) << ": failed on " << i;
-  }
-
-  // The official is* functions don't accept negative signed chars, but
-  // our absl::ascii_is* functions do.
-  for (int i = 0; i < 256; i++) {
-    signed char sc = static_cast<signed char>(static_cast<unsigned char>(i));
-    EXPECT_EQ(absl::ascii_isalpha(i), absl::ascii_isalpha(sc)) << i;
-    EXPECT_EQ(absl::ascii_isdigit(i), absl::ascii_isdigit(sc)) << i;
-    EXPECT_EQ(absl::ascii_isalnum(i), absl::ascii_isalnum(sc)) << i;
-    EXPECT_EQ(absl::ascii_isspace(i), absl::ascii_isspace(sc)) << i;
-    EXPECT_EQ(absl::ascii_ispunct(i), absl::ascii_ispunct(sc)) << i;
-    EXPECT_EQ(absl::ascii_isblank(i), absl::ascii_isblank(sc)) << i;
-    EXPECT_EQ(absl::ascii_iscntrl(i), absl::ascii_iscntrl(sc)) << i;
-    EXPECT_EQ(absl::ascii_isxdigit(i), absl::ascii_isxdigit(sc)) << i;
-    EXPECT_EQ(absl::ascii_isprint(i), absl::ascii_isprint(sc)) << i;
-    EXPECT_EQ(absl::ascii_isgraph(i), absl::ascii_isgraph(sc)) << i;
-    EXPECT_EQ(absl::ascii_isupper(i), absl::ascii_isupper(sc)) << i;
-    EXPECT_EQ(absl::ascii_islower(i), absl::ascii_islower(sc)) << i;
-    EXPECT_EQ(absl::ascii_isascii(i), absl::ascii_isascii(sc)) << i;
-  }
-}
-
-// Checks that absl::ascii_isfoo returns the same value as isfoo in the C
-// locale.
-TEST(AsciiIsFoo, SameAsIsFoo) {
-#ifndef __ANDROID__
-  // temporarily change locale to C. It should already be C, but just for safety
-  const char* old_locale = setlocale(LC_CTYPE, "C");
-  ASSERT_TRUE(old_locale != nullptr);
-#endif
-
-  for (int i = 0; i < 256; i++) {
-    EXPECT_EQ(isalpha(i) != 0, absl::ascii_isalpha(i)) << i;
-    EXPECT_EQ(isdigit(i) != 0, absl::ascii_isdigit(i)) << i;
-    EXPECT_EQ(isalnum(i) != 0, absl::ascii_isalnum(i)) << i;
-    EXPECT_EQ(isspace(i) != 0, absl::ascii_isspace(i)) << i;
-    EXPECT_EQ(ispunct(i) != 0, absl::ascii_ispunct(i)) << i;
-    EXPECT_EQ(isblank(i) != 0, absl::ascii_isblank(i)) << i;
-    EXPECT_EQ(iscntrl(i) != 0, absl::ascii_iscntrl(i)) << i;
-    EXPECT_EQ(isxdigit(i) != 0, absl::ascii_isxdigit(i)) << i;
-    EXPECT_EQ(isprint(i) != 0, absl::ascii_isprint(i)) << i;
-    EXPECT_EQ(isgraph(i) != 0, absl::ascii_isgraph(i)) << i;
-    EXPECT_EQ(isupper(i) != 0, absl::ascii_isupper(i)) << i;
-    EXPECT_EQ(islower(i) != 0, absl::ascii_islower(i)) << i;
-    EXPECT_EQ(isascii(i) != 0, absl::ascii_isascii(i)) << i;
-  }
-
-#ifndef __ANDROID__
-  // restore the old locale.
-  ASSERT_TRUE(setlocale(LC_CTYPE, old_locale));
-#endif
-}
-
-TEST(AsciiToFoo, All) {
-#ifndef __ANDROID__
-  // temporarily change locale to C. It should already be C, but just for safety
-  const char* old_locale = setlocale(LC_CTYPE, "C");
-  ASSERT_TRUE(old_locale != nullptr);
-#endif
-
-  for (int i = 0; i < 256; i++) {
-    if (absl::ascii_islower(i))
-      EXPECT_EQ(absl::ascii_toupper(i), 'A' + (i - 'a')) << i;
-    else
-      EXPECT_EQ(absl::ascii_toupper(i), static_cast<char>(i)) << i;
-
-    if (absl::ascii_isupper(i))
-      EXPECT_EQ(absl::ascii_tolower(i), 'a' + (i - 'A')) << i;
-    else
-      EXPECT_EQ(absl::ascii_tolower(i), static_cast<char>(i)) << i;
-
-    // These CHECKs only hold in a C locale.
-    EXPECT_EQ(static_cast<char>(tolower(i)), absl::ascii_tolower(i)) << i;
-    EXPECT_EQ(static_cast<char>(toupper(i)), absl::ascii_toupper(i)) << i;
-
-    // The official to* functions don't accept negative signed chars, but
-    // our absl::ascii_to* functions do.
-    signed char sc = static_cast<signed char>(static_cast<unsigned char>(i));
-    EXPECT_EQ(absl::ascii_tolower(i), absl::ascii_tolower(sc)) << i;
-    EXPECT_EQ(absl::ascii_toupper(i), absl::ascii_toupper(sc)) << i;
-  }
-#ifndef __ANDROID__
-  // restore the old locale.
-  ASSERT_TRUE(setlocale(LC_CTYPE, old_locale));
-#endif
-}
-
-TEST(AsciiStrTo, Lower) {
-  const char buf[] = "ABCDEF";
-  const std::string str("GHIJKL");
-  const std::string str2("MNOPQR");
-  const absl::string_view sp(str2);
-
-  EXPECT_EQ("abcdef", absl::AsciiStrToLower(buf));
-  EXPECT_EQ("ghijkl", absl::AsciiStrToLower(str));
-  EXPECT_EQ("mnopqr", absl::AsciiStrToLower(sp));
-
-  char mutable_buf[] = "Mutable";
-  std::transform(mutable_buf, mutable_buf + strlen(mutable_buf),
-                 mutable_buf, absl::ascii_tolower);
-  EXPECT_STREQ("mutable", mutable_buf);
-}
-
-TEST(AsciiStrTo, Upper) {
-  const char buf[] = "abcdef";
-  const std::string str("ghijkl");
-  const std::string str2("mnopqr");
-  const absl::string_view sp(str2);
-
-  EXPECT_EQ("ABCDEF", absl::AsciiStrToUpper(buf));
-  EXPECT_EQ("GHIJKL", absl::AsciiStrToUpper(str));
-  EXPECT_EQ("MNOPQR", absl::AsciiStrToUpper(sp));
-
-  char mutable_buf[] = "Mutable";
-  std::transform(mutable_buf, mutable_buf + strlen(mutable_buf),
-                 mutable_buf, absl::ascii_toupper);
-  EXPECT_STREQ("MUTABLE", mutable_buf);
-}
-
-TEST(StripLeadingAsciiWhitespace, FromStringView) {
-  EXPECT_EQ(absl::string_view{},
-            absl::StripLeadingAsciiWhitespace(absl::string_view{}));
-  EXPECT_EQ("foo", absl::StripLeadingAsciiWhitespace({"foo"}));
-  EXPECT_EQ("foo", absl::StripLeadingAsciiWhitespace({"\t  \n\f\r\n\vfoo"}));
-  EXPECT_EQ("foo foo\n ",
-            absl::StripLeadingAsciiWhitespace({"\t  \n\f\r\n\vfoo foo\n "}));
-  EXPECT_EQ(absl::string_view{}, absl::StripLeadingAsciiWhitespace(
-                                     {"\t  \n\f\r\v\n\t  \n\f\r\v\n"}));
-}
-
-TEST(StripLeadingAsciiWhitespace, InPlace) {
-  std::string str;
-
-  absl::StripLeadingAsciiWhitespace(&str);
-  EXPECT_EQ("", str);
-
-  str = "foo";
-  absl::StripLeadingAsciiWhitespace(&str);
-  EXPECT_EQ("foo", str);
-
-  str = "\t  \n\f\r\n\vfoo";
-  absl::StripLeadingAsciiWhitespace(&str);
-  EXPECT_EQ("foo", str);
-
-  str = "\t  \n\f\r\n\vfoo foo\n ";
-  absl::StripLeadingAsciiWhitespace(&str);
-  EXPECT_EQ("foo foo\n ", str);
-
-  str = "\t  \n\f\r\v\n\t  \n\f\r\v\n";
-  absl::StripLeadingAsciiWhitespace(&str);
-  EXPECT_EQ(absl::string_view{}, str);
-}
-
-TEST(StripTrailingAsciiWhitespace, FromStringView) {
-  EXPECT_EQ(absl::string_view{},
-            absl::StripTrailingAsciiWhitespace(absl::string_view{}));
-  EXPECT_EQ("foo", absl::StripTrailingAsciiWhitespace({"foo"}));
-  EXPECT_EQ("foo", absl::StripTrailingAsciiWhitespace({"foo\t  \n\f\r\n\v"}));
-  EXPECT_EQ(" \nfoo foo",
-            absl::StripTrailingAsciiWhitespace({" \nfoo foo\t  \n\f\r\n\v"}));
-  EXPECT_EQ(absl::string_view{}, absl::StripTrailingAsciiWhitespace(
-                                     {"\t  \n\f\r\v\n\t  \n\f\r\v\n"}));
-}
-
-TEST(StripTrailingAsciiWhitespace, InPlace) {
-  std::string str;
-
-  absl::StripTrailingAsciiWhitespace(&str);
-  EXPECT_EQ("", str);
-
-  str = "foo";
-  absl::StripTrailingAsciiWhitespace(&str);
-  EXPECT_EQ("foo", str);
-
-  str = "foo\t  \n\f\r\n\v";
-  absl::StripTrailingAsciiWhitespace(&str);
-  EXPECT_EQ("foo", str);
-
-  str = " \nfoo foo\t  \n\f\r\n\v";
-  absl::StripTrailingAsciiWhitespace(&str);
-  EXPECT_EQ(" \nfoo foo", str);
-
-  str = "\t  \n\f\r\v\n\t  \n\f\r\v\n";
-  absl::StripTrailingAsciiWhitespace(&str);
-  EXPECT_EQ(absl::string_view{}, str);
-}
-
-TEST(StripAsciiWhitespace, FromStringView) {
-  EXPECT_EQ(absl::string_view{},
-            absl::StripAsciiWhitespace(absl::string_view{}));
-  EXPECT_EQ("foo", absl::StripAsciiWhitespace({"foo"}));
-  EXPECT_EQ("foo",
-            absl::StripAsciiWhitespace({"\t  \n\f\r\n\vfoo\t  \n\f\r\n\v"}));
-  EXPECT_EQ("foo foo", absl::StripAsciiWhitespace(
-                           {"\t  \n\f\r\n\vfoo foo\t  \n\f\r\n\v"}));
-  EXPECT_EQ(absl::string_view{},
-            absl::StripAsciiWhitespace({"\t  \n\f\r\v\n\t  \n\f\r\v\n"}));
-}
-
-TEST(StripAsciiWhitespace, InPlace) {
-  std::string str;
-
-  absl::StripAsciiWhitespace(&str);
-  EXPECT_EQ("", str);
-
-  str = "foo";
-  absl::StripAsciiWhitespace(&str);
-  EXPECT_EQ("foo", str);
-
-  str = "\t  \n\f\r\n\vfoo\t  \n\f\r\n\v";
-  absl::StripAsciiWhitespace(&str);
-  EXPECT_EQ("foo", str);
-
-  str = "\t  \n\f\r\n\vfoo foo\t  \n\f\r\n\v";
-  absl::StripAsciiWhitespace(&str);
-  EXPECT_EQ("foo foo", str);
-
-  str = "\t  \n\f\r\v\n\t  \n\f\r\v\n";
-  absl::StripAsciiWhitespace(&str);
-  EXPECT_EQ(absl::string_view{}, str);
-}
-
-TEST(RemoveExtraAsciiWhitespace, InPlace) {
-  const char* inputs[] = {"No extra space",
-                          "  Leading whitespace",
-                          "Trailing whitespace  ",
-                          "  Leading and trailing  ",
-                          " Whitespace \t  in\v   middle  ",
-                          "'Eeeeep!  \n Newlines!\n",
-                          "nospaces",
-                          "",
-                          "\n\t a\t\n\nb \t\n"};
-
-  const char* outputs[] = {
-      "No extra space",
-      "Leading whitespace",
-      "Trailing whitespace",
-      "Leading and trailing",
-      "Whitespace in middle",
-      "'Eeeeep! Newlines!",
-      "nospaces",
-      "",
-      "a\nb",
-  };
-  const int NUM_TESTS = ABSL_ARRAYSIZE(inputs);
-
-  for (int i = 0; i < NUM_TESTS; i++) {
-    std::string s(inputs[i]);
-    absl::RemoveExtraAsciiWhitespace(&s);
-    EXPECT_EQ(outputs[i], s);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/charconv.cc b/third_party/abseil/absl/strings/charconv.cc
deleted file mode 100644
index b8674c2..0000000
--- a/third_party/abseil/absl/strings/charconv.cc
+++ /dev/null
@@ -1,984 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/charconv.h"
-
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <cstring>
-
-#include "absl/base/casts.h"
-#include "absl/numeric/bits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/internal/charconv_bigint.h"
-#include "absl/strings/internal/charconv_parse.h"
-
-// The macro ABSL_BIT_PACK_FLOATS is defined on x86-64, where IEEE floating
-// point numbers have the same endianness in memory as a bitfield struct
-// containing the corresponding parts.
-//
-// When set, we replace calls to ldexp() with manual bit packing, which is
-// faster and is unaffected by floating point environment.
-#ifdef ABSL_BIT_PACK_FLOATS
-#error ABSL_BIT_PACK_FLOATS cannot be directly set
-#elif defined(__x86_64__) || defined(_M_X64)
-#define ABSL_BIT_PACK_FLOATS 1
-#endif
-
-// A note about subnormals:
-//
-// The code below talks about "normals" and "subnormals".  A normal IEEE float
-// has a fixed-width mantissa and power of two exponent.  For example, a normal
-// `double` has a 53-bit mantissa.  Because the high bit is always 1, it is not
-// stored in the representation.  The implicit bit buys an extra bit of
-// resolution in the datatype.
-//
-// The downside of this scheme is that there is a large gap between DBL_MIN and
-// zero.  (Large, at least, relative to the different between DBL_MIN and the
-// next representable number).  This gap is softened by the "subnormal" numbers,
-// which have the same power-of-two exponent as DBL_MIN, but no implicit 53rd
-// bit.  An all-bits-zero exponent in the encoding represents subnormals.  (Zero
-// is represented as a subnormal with an all-bits-zero mantissa.)
-//
-// The code below, in calculations, represents the mantissa as a uint64_t.  The
-// end result normally has the 53rd bit set.  It represents subnormals by using
-// narrower mantissas.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-template <typename FloatType>
-struct FloatTraits;
-
-template <>
-struct FloatTraits<double> {
-  // The number of mantissa bits in the given float type.  This includes the
-  // implied high bit.
-  static constexpr int kTargetMantissaBits = 53;
-
-  // The largest supported IEEE exponent, in our integral mantissa
-  // representation.
-  //
-  // If `m` is the largest possible int kTargetMantissaBits bits wide, then
-  // m * 2**kMaxExponent is exactly equal to DBL_MAX.
-  static constexpr int kMaxExponent = 971;
-
-  // The smallest supported IEEE normal exponent, in our integral mantissa
-  // representation.
-  //
-  // If `m` is the smallest possible int kTargetMantissaBits bits wide, then
-  // m * 2**kMinNormalExponent is exactly equal to DBL_MIN.
-  static constexpr int kMinNormalExponent = -1074;
-
-  static double MakeNan(const char* tagp) {
-    // Support nan no matter which namespace it's in.  Some platforms
-    // incorrectly don't put it in namespace std.
-    using namespace std;  // NOLINT
-    return nan(tagp);
-  }
-
-  // Builds a nonzero floating point number out of the provided parts.
-  //
-  // This is intended to do the same operation as ldexp(mantissa, exponent),
-  // but using purely integer math, to avoid -ffastmath and floating
-  // point environment issues.  Using type punning is also faster. We fall back
-  // to ldexp on a per-platform basis for portability.
-  //
-  // `exponent` must be between kMinNormalExponent and kMaxExponent.
-  //
-  // `mantissa` must either be exactly kTargetMantissaBits wide, in which case
-  // a normal value is made, or it must be less narrow than that, in which case
-  // `exponent` must be exactly kMinNormalExponent, and a subnormal value is
-  // made.
-  static double Make(uint64_t mantissa, int exponent, bool sign) {
-#ifndef ABSL_BIT_PACK_FLOATS
-    // Support ldexp no matter which namespace it's in.  Some platforms
-    // incorrectly don't put it in namespace std.
-    using namespace std;  // NOLINT
-    return sign ? -ldexp(mantissa, exponent) : ldexp(mantissa, exponent);
-#else
-    constexpr uint64_t kMantissaMask =
-        (uint64_t(1) << (kTargetMantissaBits - 1)) - 1;
-    uint64_t dbl = static_cast<uint64_t>(sign) << 63;
-    if (mantissa > kMantissaMask) {
-      // Normal value.
-      // Adjust by 1023 for the exponent representation bias, and an additional
-      // 52 due to the implied decimal point in the IEEE mantissa represenation.
-      dbl += uint64_t{exponent + 1023u + kTargetMantissaBits - 1} << 52;
-      mantissa &= kMantissaMask;
-    } else {
-      // subnormal value
-      assert(exponent == kMinNormalExponent);
-    }
-    dbl += mantissa;
-    return absl::bit_cast<double>(dbl);
-#endif  // ABSL_BIT_PACK_FLOATS
-  }
-};
-
-// Specialization of floating point traits for the `float` type.  See the
-// FloatTraits<double> specialization above for meaning of each of the following
-// members and methods.
-template <>
-struct FloatTraits<float> {
-  static constexpr int kTargetMantissaBits = 24;
-  static constexpr int kMaxExponent = 104;
-  static constexpr int kMinNormalExponent = -149;
-  static float MakeNan(const char* tagp) {
-    // Support nanf no matter which namespace it's in.  Some platforms
-    // incorrectly don't put it in namespace std.
-    using namespace std;  // NOLINT
-    return nanf(tagp);
-  }
-  static float Make(uint32_t mantissa, int exponent, bool sign) {
-#ifndef ABSL_BIT_PACK_FLOATS
-    // Support ldexpf no matter which namespace it's in.  Some platforms
-    // incorrectly don't put it in namespace std.
-    using namespace std;  // NOLINT
-    return sign ? -ldexpf(mantissa, exponent) : ldexpf(mantissa, exponent);
-#else
-    constexpr uint32_t kMantissaMask =
-        (uint32_t(1) << (kTargetMantissaBits - 1)) - 1;
-    uint32_t flt = static_cast<uint32_t>(sign) << 31;
-    if (mantissa > kMantissaMask) {
-      // Normal value.
-      // Adjust by 127 for the exponent representation bias, and an additional
-      // 23 due to the implied decimal point in the IEEE mantissa represenation.
-      flt += uint32_t{exponent + 127u + kTargetMantissaBits - 1} << 23;
-      mantissa &= kMantissaMask;
-    } else {
-      // subnormal value
-      assert(exponent == kMinNormalExponent);
-    }
-    flt += mantissa;
-    return absl::bit_cast<float>(flt);
-#endif  // ABSL_BIT_PACK_FLOATS
-  }
-};
-
-// Decimal-to-binary conversions require coercing powers of 10 into a mantissa
-// and a power of 2.  The two helper functions Power10Mantissa(n) and
-// Power10Exponent(n) perform this task.  Together, these represent a hand-
-// rolled floating point value which is equal to or just less than 10**n.
-//
-// The return values satisfy two range guarantees:
-//
-//   Power10Mantissa(n) * 2**Power10Exponent(n) <= 10**n
-//     < (Power10Mantissa(n) + 1) * 2**Power10Exponent(n)
-//
-//   2**63 <= Power10Mantissa(n) < 2**64.
-//
-// Lookups into the power-of-10 table must first check the Power10Overflow() and
-// Power10Underflow() functions, to avoid out-of-bounds table access.
-//
-// Indexes into these tables are biased by -kPower10TableMin, and the table has
-// values in the range [kPower10TableMin, kPower10TableMax].
-extern const uint64_t kPower10MantissaTable[];
-extern const int16_t kPower10ExponentTable[];
-
-// The smallest allowed value for use with the Power10Mantissa() and
-// Power10Exponent() functions below.  (If a smaller exponent is needed in
-// calculations, the end result is guaranteed to underflow.)
-constexpr int kPower10TableMin = -342;
-
-// The largest allowed value for use with the Power10Mantissa() and
-// Power10Exponent() functions below.  (If a smaller exponent is needed in
-// calculations, the end result is guaranteed to overflow.)
-constexpr int kPower10TableMax = 308;
-
-uint64_t Power10Mantissa(int n) {
-  return kPower10MantissaTable[n - kPower10TableMin];
-}
-
-int Power10Exponent(int n) {
-  return kPower10ExponentTable[n - kPower10TableMin];
-}
-
-// Returns true if n is large enough that 10**n always results in an IEEE
-// overflow.
-bool Power10Overflow(int n) { return n > kPower10TableMax; }
-
-// Returns true if n is small enough that 10**n times a ParsedFloat mantissa
-// always results in an IEEE underflow.
-bool Power10Underflow(int n) { return n < kPower10TableMin; }
-
-// Returns true if Power10Mantissa(n) * 2**Power10Exponent(n) is exactly equal
-// to 10**n numerically.  Put another way, this returns true if there is no
-// truncation error in Power10Mantissa(n).
-bool Power10Exact(int n) { return n >= 0 && n <= 27; }
-
-// Sentinel exponent values for representing numbers too large or too close to
-// zero to represent in a double.
-constexpr int kOverflow = 99999;
-constexpr int kUnderflow = -99999;
-
-// Struct representing the calculated conversion result of a positive (nonzero)
-// floating point number.
-//
-// The calculated number is mantissa * 2**exponent (mantissa is treated as an
-// integer.)  `mantissa` is chosen to be the correct width for the IEEE float
-// representation being calculated.  (`mantissa` will always have the same bit
-// width for normal values, and narrower bit widths for subnormals.)
-//
-// If the result of conversion was an underflow or overflow, exponent is set
-// to kUnderflow or kOverflow.
-struct CalculatedFloat {
-  uint64_t mantissa = 0;
-  int exponent = 0;
-};
-
-// Returns the bit width of the given uint128.  (Equivalently, returns 128
-// minus the number of leading zero bits.)
-unsigned BitWidth(uint128 value) {
-  if (Uint128High64(value) == 0) {
-    return static_cast<unsigned>(bit_width(Uint128Low64(value)));
-  }
-  return 128 - countl_zero(Uint128High64(value));
-}
-
-// Calculates how far to the right a mantissa needs to be shifted to create a
-// properly adjusted mantissa for an IEEE floating point number.
-//
-// `mantissa_width` is the bit width of the mantissa to be shifted, and
-// `binary_exponent` is the exponent of the number before the shift.
-//
-// This accounts for subnormal values, and will return a larger-than-normal
-// shift if binary_exponent would otherwise be too low.
-template <typename FloatType>
-int NormalizedShiftSize(int mantissa_width, int binary_exponent) {
-  const int normal_shift =
-      mantissa_width - FloatTraits<FloatType>::kTargetMantissaBits;
-  const int minimum_shift =
-      FloatTraits<FloatType>::kMinNormalExponent - binary_exponent;
-  return std::max(normal_shift, minimum_shift);
-}
-
-// Right shifts a uint128 so that it has the requested bit width.  (The
-// resulting value will have 128 - bit_width leading zeroes.)  The initial
-// `value` must be wider than the requested bit width.
-//
-// Returns the number of bits shifted.
-int TruncateToBitWidth(int bit_width, uint128* value) {
-  const int current_bit_width = BitWidth(*value);
-  const int shift = current_bit_width - bit_width;
-  *value >>= shift;
-  return shift;
-}
-
-// Checks if the given ParsedFloat represents one of the edge cases that are
-// not dependent on number base: zero, infinity, or NaN.  If so, sets *value
-// the appropriate double, and returns true.
-template <typename FloatType>
-bool HandleEdgeCase(const strings_internal::ParsedFloat& input, bool negative,
-                    FloatType* value) {
-  if (input.type == strings_internal::FloatType::kNan) {
-    // A bug in both clang and gcc would cause the compiler to optimize away the
-    // buffer we are building below.  Declaring the buffer volatile avoids the
-    // issue, and has no measurable performance impact in microbenchmarks.
-    //
-    // https://bugs.llvm.org/show_bug.cgi?id=37778
-    // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86113
-    constexpr ptrdiff_t kNanBufferSize = 128;
-    volatile char n_char_sequence[kNanBufferSize];
-    if (input.subrange_begin == nullptr) {
-      n_char_sequence[0] = '\0';
-    } else {
-      ptrdiff_t nan_size = input.subrange_end - input.subrange_begin;
-      nan_size = std::min(nan_size, kNanBufferSize - 1);
-      std::copy_n(input.subrange_begin, nan_size, n_char_sequence);
-      n_char_sequence[nan_size] = '\0';
-    }
-    char* nan_argument = const_cast<char*>(n_char_sequence);
-    *value = negative ? -FloatTraits<FloatType>::MakeNan(nan_argument)
-                      : FloatTraits<FloatType>::MakeNan(nan_argument);
-    return true;
-  }
-  if (input.type == strings_internal::FloatType::kInfinity) {
-    *value = negative ? -std::numeric_limits<FloatType>::infinity()
-                      : std::numeric_limits<FloatType>::infinity();
-    return true;
-  }
-  if (input.mantissa == 0) {
-    *value = negative ? -0.0 : 0.0;
-    return true;
-  }
-  return false;
-}
-
-// Given a CalculatedFloat result of a from_chars conversion, generate the
-// correct output values.
-//
-// CalculatedFloat can represent an underflow or overflow, in which case the
-// error code in *result is set.  Otherwise, the calculated floating point
-// number is stored in *value.
-template <typename FloatType>
-void EncodeResult(const CalculatedFloat& calculated, bool negative,
-                  absl::from_chars_result* result, FloatType* value) {
-  if (calculated.exponent == kOverflow) {
-    result->ec = std::errc::result_out_of_range;
-    *value = negative ? -std::numeric_limits<FloatType>::max()
-                      : std::numeric_limits<FloatType>::max();
-    return;
-  } else if (calculated.mantissa == 0 || calculated.exponent == kUnderflow) {
-    result->ec = std::errc::result_out_of_range;
-    *value = negative ? -0.0 : 0.0;
-    return;
-  }
-  *value = FloatTraits<FloatType>::Make(calculated.mantissa,
-                                        calculated.exponent, negative);
-}
-
-// Returns the given uint128 shifted to the right by `shift` bits, and rounds
-// the remaining bits using round_to_nearest logic.  The value is returned as a
-// uint64_t, since this is the type used by this library for storing calculated
-// floating point mantissas.
-//
-// It is expected that the width of the input value shifted by `shift` will
-// be the correct bit-width for the target mantissa, which is strictly narrower
-// than a uint64_t.
-//
-// If `input_exact` is false, then a nonzero error epsilon is assumed.  For
-// rounding purposes, the true value being rounded is strictly greater than the
-// input value.  The error may represent a single lost carry bit.
-//
-// When input_exact, shifted bits of the form 1000000... represent a tie, which
-// is broken by rounding to even -- the rounding direction is chosen so the low
-// bit of the returned value is 0.
-//
-// When !input_exact, shifted bits of the form 10000000... represent a value
-// strictly greater than one half (due to the error epsilon), and so ties are
-// always broken by rounding up.
-//
-// When !input_exact, shifted bits of the form 01111111... are uncertain;
-// the true value may or may not be greater than 10000000..., due to the
-// possible lost carry bit.  The correct rounding direction is unknown.  In this
-// case, the result is rounded down, and `output_exact` is set to false.
-//
-// Zero and negative values of `shift` are accepted, in which case the word is
-// shifted left, as necessary.
-uint64_t ShiftRightAndRound(uint128 value, int shift, bool input_exact,
-                            bool* output_exact) {
-  if (shift <= 0) {
-    *output_exact = input_exact;
-    return static_cast<uint64_t>(value << -shift);
-  }
-  if (shift >= 128) {
-    // Exponent is so small that we are shifting away all significant bits.
-    // Answer will not be representable, even as a subnormal, so return a zero
-    // mantissa (which represents underflow).
-    *output_exact = true;
-    return 0;
-  }
-
-  *output_exact = true;
-  const uint128 shift_mask = (uint128(1) << shift) - 1;
-  const uint128 halfway_point = uint128(1) << (shift - 1);
-
-  const uint128 shifted_bits = value & shift_mask;
-  value >>= shift;
-  if (shifted_bits > halfway_point) {
-    // Shifted bits greater than 10000... require rounding up.
-    return static_cast<uint64_t>(value + 1);
-  }
-  if (shifted_bits == halfway_point) {
-    // In exact mode, shifted bits of 10000... mean we're exactly halfway
-    // between two numbers, and we must round to even.  So only round up if
-    // the low bit of `value` is set.
-    //
-    // In inexact mode, the nonzero error means the actual value is greater
-    // than the halfway point and we must alway round up.
-    if ((value & 1) == 1 || !input_exact) {
-      ++value;
-    }
-    return static_cast<uint64_t>(value);
-  }
-  if (!input_exact && shifted_bits == halfway_point - 1) {
-    // Rounding direction is unclear, due to error.
-    *output_exact = false;
-  }
-  // Otherwise, round down.
-  return static_cast<uint64_t>(value);
-}
-
-// Checks if a floating point guess needs to be rounded up, using high precision
-// math.
-//
-// `guess_mantissa` and `guess_exponent` represent a candidate guess for the
-// number represented by `parsed_decimal`.
-//
-// The exact number represented by `parsed_decimal` must lie between the two
-// numbers:
-//   A = `guess_mantissa * 2**guess_exponent`
-//   B = `(guess_mantissa + 1) * 2**guess_exponent`
-//
-// This function returns false if `A` is the better guess, and true if `B` is
-// the better guess, with rounding ties broken by rounding to even.
-bool MustRoundUp(uint64_t guess_mantissa, int guess_exponent,
-                 const strings_internal::ParsedFloat& parsed_decimal) {
-  // 768 is the number of digits needed in the worst case.  We could determine a
-  // better limit dynamically based on the value of parsed_decimal.exponent.
-  // This would optimize pathological input cases only.  (Sane inputs won't have
-  // hundreds of digits of mantissa.)
-  absl::strings_internal::BigUnsigned<84> exact_mantissa;
-  int exact_exponent = exact_mantissa.ReadFloatMantissa(parsed_decimal, 768);
-
-  // Adjust the `guess` arguments to be halfway between A and B.
-  guess_mantissa = guess_mantissa * 2 + 1;
-  guess_exponent -= 1;
-
-  // In our comparison:
-  // lhs = exact = exact_mantissa * 10**exact_exponent
-  //             = exact_mantissa * 5**exact_exponent * 2**exact_exponent
-  // rhs = guess = guess_mantissa * 2**guess_exponent
-  //
-  // Because we are doing integer math, we can't directly deal with negative
-  // exponents.  We instead move these to the other side of the inequality.
-  absl::strings_internal::BigUnsigned<84>& lhs = exact_mantissa;
-  int comparison;
-  if (exact_exponent >= 0) {
-    lhs.MultiplyByFiveToTheNth(exact_exponent);
-    absl::strings_internal::BigUnsigned<84> rhs(guess_mantissa);
-    // There are powers of 2 on both sides of the inequality; reduce this to
-    // a single bit-shift.
-    if (exact_exponent > guess_exponent) {
-      lhs.ShiftLeft(exact_exponent - guess_exponent);
-    } else {
-      rhs.ShiftLeft(guess_exponent - exact_exponent);
-    }
-    comparison = Compare(lhs, rhs);
-  } else {
-    // Move the power of 5 to the other side of the equation, giving us:
-    // lhs = exact_mantissa * 2**exact_exponent
-    // rhs = guess_mantissa * 5**(-exact_exponent) * 2**guess_exponent
-    absl::strings_internal::BigUnsigned<84> rhs =
-        absl::strings_internal::BigUnsigned<84>::FiveToTheNth(-exact_exponent);
-    rhs.MultiplyBy(guess_mantissa);
-    if (exact_exponent > guess_exponent) {
-      lhs.ShiftLeft(exact_exponent - guess_exponent);
-    } else {
-      rhs.ShiftLeft(guess_exponent - exact_exponent);
-    }
-    comparison = Compare(lhs, rhs);
-  }
-  if (comparison < 0) {
-    return false;
-  } else if (comparison > 0) {
-    return true;
-  } else {
-    // When lhs == rhs, the decimal input is exactly between A and B.
-    // Round towards even -- round up only if the low bit of the initial
-    // `guess_mantissa` was a 1.  We shifted guess_mantissa left 1 bit at
-    // the beginning of this function, so test the 2nd bit here.
-    return (guess_mantissa & 2) == 2;
-  }
-}
-
-// Constructs a CalculatedFloat from a given mantissa and exponent, but
-// with the following normalizations applied:
-//
-// If rounding has caused mantissa to increase just past the allowed bit
-// width, shift and adjust exponent.
-//
-// If exponent is too high, sets kOverflow.
-//
-// If mantissa is zero (representing a non-zero value not representable, even
-// as a subnormal), sets kUnderflow.
-template <typename FloatType>
-CalculatedFloat CalculatedFloatFromRawValues(uint64_t mantissa, int exponent) {
-  CalculatedFloat result;
-  if (mantissa == uint64_t(1) << FloatTraits<FloatType>::kTargetMantissaBits) {
-    mantissa >>= 1;
-    exponent += 1;
-  }
-  if (exponent > FloatTraits<FloatType>::kMaxExponent) {
-    result.exponent = kOverflow;
-  } else if (mantissa == 0) {
-    result.exponent = kUnderflow;
-  } else {
-    result.exponent = exponent;
-    result.mantissa = mantissa;
-  }
-  return result;
-}
-
-template <typename FloatType>
-CalculatedFloat CalculateFromParsedHexadecimal(
-    const strings_internal::ParsedFloat& parsed_hex) {
-  uint64_t mantissa = parsed_hex.mantissa;
-  int exponent = parsed_hex.exponent;
-  auto mantissa_width = static_cast<unsigned>(bit_width(mantissa));
-  const int shift = NormalizedShiftSize<FloatType>(mantissa_width, exponent);
-  bool result_exact;
-  exponent += shift;
-  mantissa = ShiftRightAndRound(mantissa, shift,
-                                /* input exact= */ true, &result_exact);
-  // ParseFloat handles rounding in the hexadecimal case, so we don't have to
-  // check `result_exact` here.
-  return CalculatedFloatFromRawValues<FloatType>(mantissa, exponent);
-}
-
-template <typename FloatType>
-CalculatedFloat CalculateFromParsedDecimal(
-    const strings_internal::ParsedFloat& parsed_decimal) {
-  CalculatedFloat result;
-
-  // Large or small enough decimal exponents will always result in overflow
-  // or underflow.
-  if (Power10Underflow(parsed_decimal.exponent)) {
-    result.exponent = kUnderflow;
-    return result;
-  } else if (Power10Overflow(parsed_decimal.exponent)) {
-    result.exponent = kOverflow;
-    return result;
-  }
-
-  // Otherwise convert our power of 10 into a power of 2 times an integer
-  // mantissa, and multiply this by our parsed decimal mantissa.
-  uint128 wide_binary_mantissa = parsed_decimal.mantissa;
-  wide_binary_mantissa *= Power10Mantissa(parsed_decimal.exponent);
-  int binary_exponent = Power10Exponent(parsed_decimal.exponent);
-
-  // Discard bits that are inaccurate due to truncation error.  The magic
-  // `mantissa_width` constants below are justified in
-  // https://abseil.io/about/design/charconv. They represent the number of bits
-  // in `wide_binary_mantissa` that are guaranteed to be unaffected by error
-  // propagation.
-  bool mantissa_exact;
-  int mantissa_width;
-  if (parsed_decimal.subrange_begin) {
-    // Truncated mantissa
-    mantissa_width = 58;
-    mantissa_exact = false;
-    binary_exponent +=
-        TruncateToBitWidth(mantissa_width, &wide_binary_mantissa);
-  } else if (!Power10Exact(parsed_decimal.exponent)) {
-    // Exact mantissa, truncated power of ten
-    mantissa_width = 63;
-    mantissa_exact = false;
-    binary_exponent +=
-        TruncateToBitWidth(mantissa_width, &wide_binary_mantissa);
-  } else {
-    // Product is exact
-    mantissa_width = BitWidth(wide_binary_mantissa);
-    mantissa_exact = true;
-  }
-
-  // Shift into an FloatType-sized mantissa, and round to nearest.
-  const int shift =
-      NormalizedShiftSize<FloatType>(mantissa_width, binary_exponent);
-  bool result_exact;
-  binary_exponent += shift;
-  uint64_t binary_mantissa = ShiftRightAndRound(wide_binary_mantissa, shift,
-                                                mantissa_exact, &result_exact);
-  if (!result_exact) {
-    // We could not determine the rounding direction using int128 math.  Use
-    // full resolution math instead.
-    if (MustRoundUp(binary_mantissa, binary_exponent, parsed_decimal)) {
-      binary_mantissa += 1;
-    }
-  }
-
-  return CalculatedFloatFromRawValues<FloatType>(binary_mantissa,
-                                                 binary_exponent);
-}
-
-template <typename FloatType>
-from_chars_result FromCharsImpl(const char* first, const char* last,
-                                FloatType& value, chars_format fmt_flags) {
-  from_chars_result result;
-  result.ptr = first;  // overwritten on successful parse
-  result.ec = std::errc();
-
-  bool negative = false;
-  if (first != last && *first == '-') {
-    ++first;
-    negative = true;
-  }
-  // If the `hex` flag is *not* set, then we will accept a 0x prefix and try
-  // to parse a hexadecimal float.
-  if ((fmt_flags & chars_format::hex) == chars_format{} && last - first >= 2 &&
-      *first == '0' && (first[1] == 'x' || first[1] == 'X')) {
-    const char* hex_first = first + 2;
-    strings_internal::ParsedFloat hex_parse =
-        strings_internal::ParseFloat<16>(hex_first, last, fmt_flags);
-    if (hex_parse.end == nullptr ||
-        hex_parse.type != strings_internal::FloatType::kNumber) {
-      // Either we failed to parse a hex float after the "0x", or we read
-      // "0xinf" or "0xnan" which we don't want to match.
-      //
-      // However, a string that begins with "0x" also begins with "0", which
-      // is normally a valid match for the number zero.  So we want these
-      // strings to match zero unless fmt_flags is `scientific`.  (This flag
-      // means an exponent is required, which the string "0" does not have.)
-      if (fmt_flags == chars_format::scientific) {
-        result.ec = std::errc::invalid_argument;
-      } else {
-        result.ptr = first + 1;
-        value = negative ? -0.0 : 0.0;
-      }
-      return result;
-    }
-    // We matched a value.
-    result.ptr = hex_parse.end;
-    if (HandleEdgeCase(hex_parse, negative, &value)) {
-      return result;
-    }
-    CalculatedFloat calculated =
-        CalculateFromParsedHexadecimal<FloatType>(hex_parse);
-    EncodeResult(calculated, negative, &result, &value);
-    return result;
-  }
-  // Otherwise, we choose the number base based on the flags.
-  if ((fmt_flags & chars_format::hex) == chars_format::hex) {
-    strings_internal::ParsedFloat hex_parse =
-        strings_internal::ParseFloat<16>(first, last, fmt_flags);
-    if (hex_parse.end == nullptr) {
-      result.ec = std::errc::invalid_argument;
-      return result;
-    }
-    result.ptr = hex_parse.end;
-    if (HandleEdgeCase(hex_parse, negative, &value)) {
-      return result;
-    }
-    CalculatedFloat calculated =
-        CalculateFromParsedHexadecimal<FloatType>(hex_parse);
-    EncodeResult(calculated, negative, &result, &value);
-    return result;
-  } else {
-    strings_internal::ParsedFloat decimal_parse =
-        strings_internal::ParseFloat<10>(first, last, fmt_flags);
-    if (decimal_parse.end == nullptr) {
-      result.ec = std::errc::invalid_argument;
-      return result;
-    }
-    result.ptr = decimal_parse.end;
-    if (HandleEdgeCase(decimal_parse, negative, &value)) {
-      return result;
-    }
-    CalculatedFloat calculated =
-        CalculateFromParsedDecimal<FloatType>(decimal_parse);
-    EncodeResult(calculated, negative, &result, &value);
-    return result;
-  }
-}
-}  // namespace
-
-from_chars_result from_chars(const char* first, const char* last, double& value,
-                             chars_format fmt) {
-  return FromCharsImpl(first, last, value, fmt);
-}
-
-from_chars_result from_chars(const char* first, const char* last, float& value,
-                             chars_format fmt) {
-  return FromCharsImpl(first, last, value, fmt);
-}
-
-namespace {
-
-// Table of powers of 10, from kPower10TableMin to kPower10TableMax.
-//
-// kPower10MantissaTable[i - kPower10TableMin] stores the 64-bit mantissa (high
-// bit always on), and kPower10ExponentTable[i - kPower10TableMin] stores the
-// power-of-two exponent.  For a given number i, this gives the unique mantissa
-// and exponent such that mantissa * 2**exponent <= 10**i < (mantissa + 1) *
-// 2**exponent.
-
-const uint64_t kPower10MantissaTable[] = {
-    0xeef453d6923bd65aU, 0x9558b4661b6565f8U, 0xbaaee17fa23ebf76U,
-    0xe95a99df8ace6f53U, 0x91d8a02bb6c10594U, 0xb64ec836a47146f9U,
-    0xe3e27a444d8d98b7U, 0x8e6d8c6ab0787f72U, 0xb208ef855c969f4fU,
-    0xde8b2b66b3bc4723U, 0x8b16fb203055ac76U, 0xaddcb9e83c6b1793U,
-    0xd953e8624b85dd78U, 0x87d4713d6f33aa6bU, 0xa9c98d8ccb009506U,
-    0xd43bf0effdc0ba48U, 0x84a57695fe98746dU, 0xa5ced43b7e3e9188U,
-    0xcf42894a5dce35eaU, 0x818995ce7aa0e1b2U, 0xa1ebfb4219491a1fU,
-    0xca66fa129f9b60a6U, 0xfd00b897478238d0U, 0x9e20735e8cb16382U,
-    0xc5a890362fddbc62U, 0xf712b443bbd52b7bU, 0x9a6bb0aa55653b2dU,
-    0xc1069cd4eabe89f8U, 0xf148440a256e2c76U, 0x96cd2a865764dbcaU,
-    0xbc807527ed3e12bcU, 0xeba09271e88d976bU, 0x93445b8731587ea3U,
-    0xb8157268fdae9e4cU, 0xe61acf033d1a45dfU, 0x8fd0c16206306babU,
-    0xb3c4f1ba87bc8696U, 0xe0b62e2929aba83cU, 0x8c71dcd9ba0b4925U,
-    0xaf8e5410288e1b6fU, 0xdb71e91432b1a24aU, 0x892731ac9faf056eU,
-    0xab70fe17c79ac6caU, 0xd64d3d9db981787dU, 0x85f0468293f0eb4eU,
-    0xa76c582338ed2621U, 0xd1476e2c07286faaU, 0x82cca4db847945caU,
-    0xa37fce126597973cU, 0xcc5fc196fefd7d0cU, 0xff77b1fcbebcdc4fU,
-    0x9faacf3df73609b1U, 0xc795830d75038c1dU, 0xf97ae3d0d2446f25U,
-    0x9becce62836ac577U, 0xc2e801fb244576d5U, 0xf3a20279ed56d48aU,
-    0x9845418c345644d6U, 0xbe5691ef416bd60cU, 0xedec366b11c6cb8fU,
-    0x94b3a202eb1c3f39U, 0xb9e08a83a5e34f07U, 0xe858ad248f5c22c9U,
-    0x91376c36d99995beU, 0xb58547448ffffb2dU, 0xe2e69915b3fff9f9U,
-    0x8dd01fad907ffc3bU, 0xb1442798f49ffb4aU, 0xdd95317f31c7fa1dU,
-    0x8a7d3eef7f1cfc52U, 0xad1c8eab5ee43b66U, 0xd863b256369d4a40U,
-    0x873e4f75e2224e68U, 0xa90de3535aaae202U, 0xd3515c2831559a83U,
-    0x8412d9991ed58091U, 0xa5178fff668ae0b6U, 0xce5d73ff402d98e3U,
-    0x80fa687f881c7f8eU, 0xa139029f6a239f72U, 0xc987434744ac874eU,
-    0xfbe9141915d7a922U, 0x9d71ac8fada6c9b5U, 0xc4ce17b399107c22U,
-    0xf6019da07f549b2bU, 0x99c102844f94e0fbU, 0xc0314325637a1939U,
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-    0xc3b8358109e84f07U, 0xf4a642e14c6262c8U, 0x98e7e9cccfbd7dbdU,
-    0xbf21e44003acdd2cU, 0xeeea5d5004981478U, 0x95527a5202df0ccbU,
-    0xbaa718e68396cffdU, 0xe950df20247c83fdU, 0x91d28b7416cdd27eU,
-    0xb6472e511c81471dU, 0xe3d8f9e563a198e5U, 0x8e679c2f5e44ff8fU,
-};
-
-const int16_t kPower10ExponentTable[] = {
-    -1200, -1196, -1193, -1190, -1186, -1183, -1180, -1176, -1173, -1170, -1166,
-    -1163, -1160, -1156, -1153, -1150, -1146, -1143, -1140, -1136, -1133, -1130,
-    -1127, -1123, -1120, -1117, -1113, -1110, -1107, -1103, -1100, -1097, -1093,
-    -1090, -1087, -1083, -1080, -1077, -1073, -1070, -1067, -1063, -1060, -1057,
-    -1053, -1050, -1047, -1043, -1040, -1037, -1034, -1030, -1027, -1024, -1020,
-    -1017, -1014, -1010, -1007, -1004, -1000, -997,  -994,  -990,  -987,  -984,
-    -980,  -977,  -974,  -970,  -967,  -964,  -960,  -957,  -954,  -950,  -947,
-    -944,  -940,  -937,  -934,  -931,  -927,  -924,  -921,  -917,  -914,  -911,
-    -907,  -904,  -901,  -897,  -894,  -891,  -887,  -884,  -881,  -877,  -874,
-    -871,  -867,  -864,  -861,  -857,  -854,  -851,  -847,  -844,  -841,  -838,
-    -834,  -831,  -828,  -824,  -821,  -818,  -814,  -811,  -808,  -804,  -801,
-    -798,  -794,  -791,  -788,  -784,  -781,  -778,  -774,  -771,  -768,  -764,
-    -761,  -758,  -754,  -751,  -748,  -744,  -741,  -738,  -735,  -731,  -728,
-    -725,  -721,  -718,  -715,  -711,  -708,  -705,  -701,  -698,  -695,  -691,
-    -688,  -685,  -681,  -678,  -675,  -671,  -668,  -665,  -661,  -658,  -655,
-    -651,  -648,  -645,  -642,  -638,  -635,  -632,  -628,  -625,  -622,  -618,
-    -615,  -612,  -608,  -605,  -602,  -598,  -595,  -592,  -588,  -585,  -582,
-    -578,  -575,  -572,  -568,  -565,  -562,  -558,  -555,  -552,  -549,  -545,
-    -542,  -539,  -535,  -532,  -529,  -525,  -522,  -519,  -515,  -512,  -509,
-    -505,  -502,  -499,  -495,  -492,  -489,  -485,  -482,  -479,  -475,  -472,
-    -469,  -465,  -462,  -459,  -455,  -452,  -449,  -446,  -442,  -439,  -436,
-    -432,  -429,  -426,  -422,  -419,  -416,  -412,  -409,  -406,  -402,  -399,
-    -396,  -392,  -389,  -386,  -382,  -379,  -376,  -372,  -369,  -366,  -362,
-    -359,  -356,  -353,  -349,  -346,  -343,  -339,  -336,  -333,  -329,  -326,
-    -323,  -319,  -316,  -313,  -309,  -306,  -303,  -299,  -296,  -293,  -289,
-    -286,  -283,  -279,  -276,  -273,  -269,  -266,  -263,  -259,  -256,  -253,
-    -250,  -246,  -243,  -240,  -236,  -233,  -230,  -226,  -223,  -220,  -216,
-    -213,  -210,  -206,  -203,  -200,  -196,  -193,  -190,  -186,  -183,  -180,
-    -176,  -173,  -170,  -166,  -163,  -160,  -157,  -153,  -150,  -147,  -143,
-    -140,  -137,  -133,  -130,  -127,  -123,  -120,  -117,  -113,  -110,  -107,
-    -103,  -100,  -97,   -93,   -90,   -87,   -83,   -80,   -77,   -73,   -70,
-    -67,   -63,   -60,   -57,   -54,   -50,   -47,   -44,   -40,   -37,   -34,
-    -30,   -27,   -24,   -20,   -17,   -14,   -10,   -7,    -4,    0,     3,
-    6,     10,    13,    16,    20,    23,    26,    30,    33,    36,    39,
-    43,    46,    49,    53,    56,    59,    63,    66,    69,    73,    76,
-    79,    83,    86,    89,    93,    96,    99,    103,   106,   109,   113,
-    116,   119,   123,   126,   129,   132,   136,   139,   142,   146,   149,
-    152,   156,   159,   162,   166,   169,   172,   176,   179,   182,   186,
-    189,   192,   196,   199,   202,   206,   209,   212,   216,   219,   222,
-    226,   229,   232,   235,   239,   242,   245,   249,   252,   255,   259,
-    262,   265,   269,   272,   275,   279,   282,   285,   289,   292,   295,
-    299,   302,   305,   309,   312,   315,   319,   322,   325,   328,   332,
-    335,   338,   342,   345,   348,   352,   355,   358,   362,   365,   368,
-    372,   375,   378,   382,   385,   388,   392,   395,   398,   402,   405,
-    408,   412,   415,   418,   422,   425,   428,   431,   435,   438,   441,
-    445,   448,   451,   455,   458,   461,   465,   468,   471,   475,   478,
-    481,   485,   488,   491,   495,   498,   501,   505,   508,   511,   515,
-    518,   521,   524,   528,   531,   534,   538,   541,   544,   548,   551,
-    554,   558,   561,   564,   568,   571,   574,   578,   581,   584,   588,
-    591,   594,   598,   601,   604,   608,   611,   614,   617,   621,   624,
-    627,   631,   634,   637,   641,   644,   647,   651,   654,   657,   661,
-    664,   667,   671,   674,   677,   681,   684,   687,   691,   694,   697,
-    701,   704,   707,   711,   714,   717,   720,   724,   727,   730,   734,
-    737,   740,   744,   747,   750,   754,   757,   760,   764,   767,   770,
-    774,   777,   780,   784,   787,   790,   794,   797,   800,   804,   807,
-    810,   813,   817,   820,   823,   827,   830,   833,   837,   840,   843,
-    847,   850,   853,   857,   860,   863,   867,   870,   873,   877,   880,
-    883,   887,   890,   893,   897,   900,   903,   907,   910,   913,   916,
-    920,   923,   926,   930,   933,   936,   940,   943,   946,   950,   953,
-    956,   960,
-};
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/charconv.h b/third_party/abseil/absl/strings/charconv.h
deleted file mode 100644
index e04be32..0000000
--- a/third_party/abseil/absl/strings/charconv.h
+++ /dev/null
@@ -1,119 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_CHARCONV_H_
-#define ABSL_STRINGS_CHARCONV_H_
-
-#include <system_error>  // NOLINT(build/c++11)
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Workalike compatibilty version of std::chars_format from C++17.
-//
-// This is an bitfield enumerator which can be passed to absl::from_chars to
-// configure the string-to-float conversion.
-enum class chars_format {
-  scientific = 1,
-  fixed = 2,
-  hex = 4,
-  general = fixed | scientific,
-};
-
-// The return result of a string-to-number conversion.
-//
-// `ec` will be set to `invalid_argument` if a well-formed number was not found
-// at the start of the input range, `result_out_of_range` if a well-formed
-// number was found, but it was out of the representable range of the requested
-// type, or to std::errc() otherwise.
-//
-// If a well-formed number was found, `ptr` is set to one past the sequence of
-// characters that were successfully parsed.  If none was found, `ptr` is set
-// to the `first` argument to from_chars.
-struct from_chars_result {
-  const char* ptr;
-  std::errc ec;
-};
-
-// Workalike compatibilty version of std::from_chars from C++17.  Currently
-// this only supports the `double` and `float` types.
-//
-// This interface incorporates the proposed resolutions for library issues
-// DR 3080 and DR 3081.  If these are adopted with different wording,
-// Abseil's behavior will change to match the standard.  (The behavior most
-// likely to change is for DR 3081, which says what `value` will be set to in
-// the case of overflow and underflow.  Code that wants to avoid possible
-// breaking changes in this area should not depend on `value` when the returned
-// from_chars_result indicates a range error.)
-//
-// Searches the range [first, last) for the longest matching pattern beginning
-// at `first` that represents a floating point number.  If one is found, store
-// the result in `value`.
-//
-// The matching pattern format is almost the same as that of strtod(), except
-// that C locale is not respected, and an initial '+' character in the input
-// range will never be matched.
-//
-// If `fmt` is set, it must be one of the enumerator values of the chars_format.
-// (This is despite the fact that chars_format is a bitmask type.)  If set to
-// `scientific`, a matching number must contain an exponent.  If set to `fixed`,
-// then an exponent will never match.  (For example, the string "1e5" will be
-// parsed as "1".)  If set to `hex`, then a hexadecimal float is parsed in the
-// format that strtod() accepts, except that a "0x" prefix is NOT matched.
-// (In particular, in `hex` mode, the input "0xff" results in the largest
-// matching pattern "0".)
-absl::from_chars_result from_chars(const char* first, const char* last,
-                                   double& value,  // NOLINT
-                                   chars_format fmt = chars_format::general);
-
-absl::from_chars_result from_chars(const char* first, const char* last,
-                                   float& value,  // NOLINT
-                                   chars_format fmt = chars_format::general);
-
-// std::chars_format is specified as a bitmask type, which means the following
-// operations must be provided:
-inline constexpr chars_format operator&(chars_format lhs, chars_format rhs) {
-  return static_cast<chars_format>(static_cast<int>(lhs) &
-                                   static_cast<int>(rhs));
-}
-inline constexpr chars_format operator|(chars_format lhs, chars_format rhs) {
-  return static_cast<chars_format>(static_cast<int>(lhs) |
-                                   static_cast<int>(rhs));
-}
-inline constexpr chars_format operator^(chars_format lhs, chars_format rhs) {
-  return static_cast<chars_format>(static_cast<int>(lhs) ^
-                                   static_cast<int>(rhs));
-}
-inline constexpr chars_format operator~(chars_format arg) {
-  return static_cast<chars_format>(~static_cast<int>(arg));
-}
-inline chars_format& operator&=(chars_format& lhs, chars_format rhs) {
-  lhs = lhs & rhs;
-  return lhs;
-}
-inline chars_format& operator|=(chars_format& lhs, chars_format rhs) {
-  lhs = lhs | rhs;
-  return lhs;
-}
-inline chars_format& operator^=(chars_format& lhs, chars_format rhs) {
-  lhs = lhs ^ rhs;
-  return lhs;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_CHARCONV_H_
diff --git a/third_party/abseil/absl/strings/charconv_benchmark.cc b/third_party/abseil/absl/strings/charconv_benchmark.cc
deleted file mode 100644
index e8c7371..0000000
--- a/third_party/abseil/absl/strings/charconv_benchmark.cc
+++ /dev/null
@@ -1,204 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/charconv.h"
-
-#include <cstdlib>
-#include <cstring>
-#include <string>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-void BM_Strtod_Pi(benchmark::State& state) {
-  const char* pi = "3.14159";
-  for (auto s : state) {
-    benchmark::DoNotOptimize(pi);
-    benchmark::DoNotOptimize(strtod(pi, nullptr));
-  }
-}
-BENCHMARK(BM_Strtod_Pi);
-
-void BM_Absl_Pi(benchmark::State& state) {
-  const char* pi = "3.14159";
-  const char* pi_end = pi + strlen(pi);
-  for (auto s : state) {
-    benchmark::DoNotOptimize(pi);
-    double v;
-    absl::from_chars(pi, pi_end, v);
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_Absl_Pi);
-
-void BM_Strtod_Pi_float(benchmark::State& state) {
-  const char* pi = "3.14159";
-  for (auto s : state) {
-    benchmark::DoNotOptimize(pi);
-    benchmark::DoNotOptimize(strtof(pi, nullptr));
-  }
-}
-BENCHMARK(BM_Strtod_Pi_float);
-
-void BM_Absl_Pi_float(benchmark::State& state) {
-  const char* pi = "3.14159";
-  const char* pi_end = pi + strlen(pi);
-  for (auto s : state) {
-    benchmark::DoNotOptimize(pi);
-    float v;
-    absl::from_chars(pi, pi_end, v);
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_Absl_Pi_float);
-
-void BM_Strtod_HardLarge(benchmark::State& state) {
-  const char* num = "272104041512242479.e200";
-  for (auto s : state) {
-    benchmark::DoNotOptimize(num);
-    benchmark::DoNotOptimize(strtod(num, nullptr));
-  }
-}
-BENCHMARK(BM_Strtod_HardLarge);
-
-void BM_Absl_HardLarge(benchmark::State& state) {
-  const char* numstr = "272104041512242479.e200";
-  const char* numstr_end = numstr + strlen(numstr);
-  for (auto s : state) {
-    benchmark::DoNotOptimize(numstr);
-    double v;
-    absl::from_chars(numstr, numstr_end, v);
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_Absl_HardLarge);
-
-void BM_Strtod_HardSmall(benchmark::State& state) {
-  const char* num = "94080055902682397.e-242";
-  for (auto s : state) {
-    benchmark::DoNotOptimize(num);
-    benchmark::DoNotOptimize(strtod(num, nullptr));
-  }
-}
-BENCHMARK(BM_Strtod_HardSmall);
-
-void BM_Absl_HardSmall(benchmark::State& state) {
-  const char* numstr = "94080055902682397.e-242";
-  const char* numstr_end = numstr + strlen(numstr);
-  for (auto s : state) {
-    benchmark::DoNotOptimize(numstr);
-    double v;
-    absl::from_chars(numstr, numstr_end, v);
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_Absl_HardSmall);
-
-void BM_Strtod_HugeMantissa(benchmark::State& state) {
-  std::string huge(200, '3');
-  const char* num = huge.c_str();
-  for (auto s : state) {
-    benchmark::DoNotOptimize(num);
-    benchmark::DoNotOptimize(strtod(num, nullptr));
-  }
-}
-BENCHMARK(BM_Strtod_HugeMantissa);
-
-void BM_Absl_HugeMantissa(benchmark::State& state) {
-  std::string huge(200, '3');
-  const char* num = huge.c_str();
-  const char* num_end = num + 200;
-  for (auto s : state) {
-    benchmark::DoNotOptimize(num);
-    double v;
-    absl::from_chars(num, num_end, v);
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_Absl_HugeMantissa);
-
-std::string MakeHardCase(int length) {
-  // The number 1.1521...e-297 is exactly halfway between 12345 * 2**-1000 and
-  // the next larger representable number.  The digits of this number are in
-  // the string below.
-  const std::string digits =
-      "1."
-      "152113937042223790993097181572444900347587985074226836242307364987727724"
-      "831384300183638649152607195040591791364113930628852279348613864894524591"
-      "272746490313676832900762939595690019745859128071117417798540258114233761"
-      "012939937017879509401007964861774960297319002612457273148497158989073482"
-      "171377406078223015359818300988676687994537274548940612510414856761641652"
-      "513434981938564294004070500716200446656421722229202383105446378511678258"
-      "370570631774499359748259931676320916632111681001853983492795053244971606"
-      "922718923011680846577744433974087653954904214152517799883551075537146316"
-      "168973685866425605046988661997658648354773076621610279716804960009043764"
-      "038392994055171112475093876476783502487512538082706095923790634572014823"
-      "78877699375152587890625" +
-      std::string(5000, '0');
-  // generate the hard cases on either side for the given length.
-  // Lengths between 3 and 1000 are reasonable.
-  return digits.substr(0, length) + "1e-297";
-}
-
-void BM_Strtod_Big_And_Difficult(benchmark::State& state) {
-  std::string testcase = MakeHardCase(state.range(0));
-  const char* begin = testcase.c_str();
-  for (auto s : state) {
-    benchmark::DoNotOptimize(begin);
-    benchmark::DoNotOptimize(strtod(begin, nullptr));
-  }
-}
-BENCHMARK(BM_Strtod_Big_And_Difficult)->Range(3, 5000);
-
-void BM_Absl_Big_And_Difficult(benchmark::State& state) {
-  std::string testcase = MakeHardCase(state.range(0));
-  const char* begin = testcase.c_str();
-  const char* end = begin + testcase.size();
-  for (auto s : state) {
-    benchmark::DoNotOptimize(begin);
-    double v;
-    absl::from_chars(begin, end, v);
-    benchmark::DoNotOptimize(v);
-  }
-}
-BENCHMARK(BM_Absl_Big_And_Difficult)->Range(3, 5000);
-
-}  // namespace
-
-// ------------------------------------------------------------------------
-// Benchmark                                 Time           CPU Iterations
-// ------------------------------------------------------------------------
-// BM_Strtod_Pi                             96 ns         96 ns    6337454
-// BM_Absl_Pi                               35 ns         35 ns   20031996
-// BM_Strtod_Pi_float                       91 ns         91 ns    7745851
-// BM_Absl_Pi_float                         35 ns         35 ns   20430298
-// BM_Strtod_HardLarge                     133 ns        133 ns    5288341
-// BM_Absl_HardLarge                       181 ns        181 ns    3855615
-// BM_Strtod_HardSmall                     279 ns        279 ns    2517243
-// BM_Absl_HardSmall                       287 ns        287 ns    2458744
-// BM_Strtod_HugeMantissa                  433 ns        433 ns    1604293
-// BM_Absl_HugeMantissa                    160 ns        160 ns    4403671
-// BM_Strtod_Big_And_Difficult/3           236 ns        236 ns    2942496
-// BM_Strtod_Big_And_Difficult/8           232 ns        232 ns    2983796
-// BM_Strtod_Big_And_Difficult/64          437 ns        437 ns    1591951
-// BM_Strtod_Big_And_Difficult/512        1738 ns       1738 ns     402519
-// BM_Strtod_Big_And_Difficult/4096       3943 ns       3943 ns     176128
-// BM_Strtod_Big_And_Difficult/5000       4397 ns       4397 ns     157878
-// BM_Absl_Big_And_Difficult/3              39 ns         39 ns   17799583
-// BM_Absl_Big_And_Difficult/8              43 ns         43 ns   16096859
-// BM_Absl_Big_And_Difficult/64            550 ns        550 ns    1259717
-// BM_Absl_Big_And_Difficult/512          4167 ns       4167 ns     171414
-// BM_Absl_Big_And_Difficult/4096         9160 ns       9159 ns      76297
-// BM_Absl_Big_And_Difficult/5000         9738 ns       9738 ns      70140
diff --git a/third_party/abseil/absl/strings/charconv_test.cc b/third_party/abseil/absl/strings/charconv_test.cc
deleted file mode 100644
index b83de5a..0000000
--- a/third_party/abseil/absl/strings/charconv_test.cc
+++ /dev/null
@@ -1,782 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/charconv.h"
-
-#include <cstdlib>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/internal/pow10_helper.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-
-#ifdef _MSC_FULL_VER
-#define ABSL_COMPILER_DOES_EXACT_ROUNDING 0
-#define ABSL_STRTOD_HANDLES_NAN_CORRECTLY 0
-#else
-#define ABSL_COMPILER_DOES_EXACT_ROUNDING 1
-#define ABSL_STRTOD_HANDLES_NAN_CORRECTLY 1
-#endif
-
-namespace {
-
-using absl::strings_internal::Pow10;
-
-#if ABSL_COMPILER_DOES_EXACT_ROUNDING
-
-// Tests that the given string is accepted by absl::from_chars, and that it
-// converts exactly equal to the given number.
-void TestDoubleParse(absl::string_view str, double expected_number) {
-  SCOPED_TRACE(str);
-  double actual_number = 0.0;
-  absl::from_chars_result result =
-      absl::from_chars(str.data(), str.data() + str.length(), actual_number);
-  EXPECT_EQ(result.ec, std::errc());
-  EXPECT_EQ(result.ptr, str.data() + str.length());
-  EXPECT_EQ(actual_number, expected_number);
-}
-
-void TestFloatParse(absl::string_view str, float expected_number) {
-  SCOPED_TRACE(str);
-  float actual_number = 0.0;
-  absl::from_chars_result result =
-      absl::from_chars(str.data(), str.data() + str.length(), actual_number);
-  EXPECT_EQ(result.ec, std::errc());
-  EXPECT_EQ(result.ptr, str.data() + str.length());
-  EXPECT_EQ(actual_number, expected_number);
-}
-
-// Tests that the given double or single precision floating point literal is
-// parsed correctly by absl::from_chars.
-//
-// These convenience macros assume that the C++ compiler being used also does
-// fully correct decimal-to-binary conversions.
-#define FROM_CHARS_TEST_DOUBLE(number)     \
-  {                                        \
-    TestDoubleParse(#number, number);      \
-    TestDoubleParse("-" #number, -number); \
-  }
-
-#define FROM_CHARS_TEST_FLOAT(number)        \
-  {                                          \
-    TestFloatParse(#number, number##f);      \
-    TestFloatParse("-" #number, -number##f); \
-  }
-
-TEST(FromChars, NearRoundingCases) {
-  // Cases from "A Program for Testing IEEE Decimal-Binary Conversion"
-  // by Vern Paxson.
-
-  // Forms that should round towards zero.  (These are the hardest cases for
-  // each decimal mantissa size.)
-  FROM_CHARS_TEST_DOUBLE(5.e125);
-  FROM_CHARS_TEST_DOUBLE(69.e267);
-  FROM_CHARS_TEST_DOUBLE(999.e-026);
-  FROM_CHARS_TEST_DOUBLE(7861.e-034);
-  FROM_CHARS_TEST_DOUBLE(75569.e-254);
-  FROM_CHARS_TEST_DOUBLE(928609.e-261);
-  FROM_CHARS_TEST_DOUBLE(9210917.e080);
-  FROM_CHARS_TEST_DOUBLE(84863171.e114);
-  FROM_CHARS_TEST_DOUBLE(653777767.e273);
-  FROM_CHARS_TEST_DOUBLE(5232604057.e-298);
-  FROM_CHARS_TEST_DOUBLE(27235667517.e-109);
-  FROM_CHARS_TEST_DOUBLE(653532977297.e-123);
-  FROM_CHARS_TEST_DOUBLE(3142213164987.e-294);
-  FROM_CHARS_TEST_DOUBLE(46202199371337.e-072);
-  FROM_CHARS_TEST_DOUBLE(231010996856685.e-073);
-  FROM_CHARS_TEST_DOUBLE(9324754620109615.e212);
-  FROM_CHARS_TEST_DOUBLE(78459735791271921.e049);
-  FROM_CHARS_TEST_DOUBLE(272104041512242479.e200);
-  FROM_CHARS_TEST_DOUBLE(6802601037806061975.e198);
-  FROM_CHARS_TEST_DOUBLE(20505426358836677347.e-221);
-  FROM_CHARS_TEST_DOUBLE(836168422905420598437.e-234);
-  FROM_CHARS_TEST_DOUBLE(4891559871276714924261.e222);
-  FROM_CHARS_TEST_FLOAT(5.e-20);
-  FROM_CHARS_TEST_FLOAT(67.e14);
-  FROM_CHARS_TEST_FLOAT(985.e15);
-  FROM_CHARS_TEST_FLOAT(7693.e-42);
-  FROM_CHARS_TEST_FLOAT(55895.e-16);
-  FROM_CHARS_TEST_FLOAT(996622.e-44);
-  FROM_CHARS_TEST_FLOAT(7038531.e-32);
-  FROM_CHARS_TEST_FLOAT(60419369.e-46);
-  FROM_CHARS_TEST_FLOAT(702990899.e-20);
-  FROM_CHARS_TEST_FLOAT(6930161142.e-48);
-  FROM_CHARS_TEST_FLOAT(25933168707.e-13);
-  FROM_CHARS_TEST_FLOAT(596428896559.e20);
-
-  // Similarly, forms that should round away from zero.
-  FROM_CHARS_TEST_DOUBLE(9.e-265);
-  FROM_CHARS_TEST_DOUBLE(85.e-037);
-  FROM_CHARS_TEST_DOUBLE(623.e100);
-  FROM_CHARS_TEST_DOUBLE(3571.e263);
-  FROM_CHARS_TEST_DOUBLE(81661.e153);
-  FROM_CHARS_TEST_DOUBLE(920657.e-023);
-  FROM_CHARS_TEST_DOUBLE(4603285.e-024);
-  FROM_CHARS_TEST_DOUBLE(87575437.e-309);
-  FROM_CHARS_TEST_DOUBLE(245540327.e122);
-  FROM_CHARS_TEST_DOUBLE(6138508175.e120);
-  FROM_CHARS_TEST_DOUBLE(83356057653.e193);
-  FROM_CHARS_TEST_DOUBLE(619534293513.e124);
-  FROM_CHARS_TEST_DOUBLE(2335141086879.e218);
-  FROM_CHARS_TEST_DOUBLE(36167929443327.e-159);
-  FROM_CHARS_TEST_DOUBLE(609610927149051.e-255);
-  FROM_CHARS_TEST_DOUBLE(3743626360493413.e-165);
-  FROM_CHARS_TEST_DOUBLE(94080055902682397.e-242);
-  FROM_CHARS_TEST_DOUBLE(899810892172646163.e283);
-  FROM_CHARS_TEST_DOUBLE(7120190517612959703.e120);
-  FROM_CHARS_TEST_DOUBLE(25188282901709339043.e-252);
-  FROM_CHARS_TEST_DOUBLE(308984926168550152811.e-052);
-  FROM_CHARS_TEST_DOUBLE(6372891218502368041059.e064);
-  FROM_CHARS_TEST_FLOAT(3.e-23);
-  FROM_CHARS_TEST_FLOAT(57.e18);
-  FROM_CHARS_TEST_FLOAT(789.e-35);
-  FROM_CHARS_TEST_FLOAT(2539.e-18);
-  FROM_CHARS_TEST_FLOAT(76173.e28);
-  FROM_CHARS_TEST_FLOAT(887745.e-11);
-  FROM_CHARS_TEST_FLOAT(5382571.e-37);
-  FROM_CHARS_TEST_FLOAT(82381273.e-35);
-  FROM_CHARS_TEST_FLOAT(750486563.e-38);
-  FROM_CHARS_TEST_FLOAT(3752432815.e-39);
-  FROM_CHARS_TEST_FLOAT(75224575729.e-45);
-  FROM_CHARS_TEST_FLOAT(459926601011.e15);
-}
-
-#undef FROM_CHARS_TEST_DOUBLE
-#undef FROM_CHARS_TEST_FLOAT
-#endif
-
-float ToFloat(absl::string_view s) {
-  float f;
-  absl::from_chars(s.data(), s.data() + s.size(), f);
-  return f;
-}
-
-double ToDouble(absl::string_view s) {
-  double d;
-  absl::from_chars(s.data(), s.data() + s.size(), d);
-  return d;
-}
-
-// A duplication of the test cases in "NearRoundingCases" above, but with
-// expected values expressed with integers, using ldexp/ldexpf.  These test
-// cases will work even on compilers that do not accurately round floating point
-// literals.
-TEST(FromChars, NearRoundingCasesExplicit) {
-  EXPECT_EQ(ToDouble("5.e125"), ldexp(6653062250012735, 365));
-  EXPECT_EQ(ToDouble("69.e267"), ldexp(4705683757438170, 841));
-  EXPECT_EQ(ToDouble("999.e-026"), ldexp(6798841691080350, -129));
-  EXPECT_EQ(ToDouble("7861.e-034"), ldexp(8975675289889240, -153));
-  EXPECT_EQ(ToDouble("75569.e-254"), ldexp(6091718967192243, -880));
-  EXPECT_EQ(ToDouble("928609.e-261"), ldexp(7849264900213743, -900));
-  EXPECT_EQ(ToDouble("9210917.e080"), ldexp(8341110837370930, 236));
-  EXPECT_EQ(ToDouble("84863171.e114"), ldexp(4625202867375927, 353));
-  EXPECT_EQ(ToDouble("653777767.e273"), ldexp(5068902999763073, 884));
-  EXPECT_EQ(ToDouble("5232604057.e-298"), ldexp(5741343011915040, -1010));
-  EXPECT_EQ(ToDouble("27235667517.e-109"), ldexp(6707124626673586, -380));
-  EXPECT_EQ(ToDouble("653532977297.e-123"), ldexp(7078246407265384, -422));
-  EXPECT_EQ(ToDouble("3142213164987.e-294"), ldexp(8219991337640559, -988));
-  EXPECT_EQ(ToDouble("46202199371337.e-072"), ldexp(5224462102115359, -246));
-  EXPECT_EQ(ToDouble("231010996856685.e-073"), ldexp(5224462102115359, -247));
-  EXPECT_EQ(ToDouble("9324754620109615.e212"), ldexp(5539753864394442, 705));
-  EXPECT_EQ(ToDouble("78459735791271921.e049"), ldexp(8388176519442766, 166));
-  EXPECT_EQ(ToDouble("272104041512242479.e200"), ldexp(5554409530847367, 670));
-  EXPECT_EQ(ToDouble("6802601037806061975.e198"), ldexp(5554409530847367, 668));
-  EXPECT_EQ(ToDouble("20505426358836677347.e-221"),
-            ldexp(4524032052079546, -722));
-  EXPECT_EQ(ToDouble("836168422905420598437.e-234"),
-            ldexp(5070963299887562, -760));
-  EXPECT_EQ(ToDouble("4891559871276714924261.e222"),
-            ldexp(6452687840519111, 757));
-  EXPECT_EQ(ToFloat("5.e-20"), ldexpf(15474250, -88));
-  EXPECT_EQ(ToFloat("67.e14"), ldexpf(12479722, 29));
-  EXPECT_EQ(ToFloat("985.e15"), ldexpf(14333636, 36));
-  EXPECT_EQ(ToFloat("7693.e-42"), ldexpf(10979816, -150));
-  EXPECT_EQ(ToFloat("55895.e-16"), ldexpf(12888509, -61));
-  EXPECT_EQ(ToFloat("996622.e-44"), ldexpf(14224264, -150));
-  EXPECT_EQ(ToFloat("7038531.e-32"), ldexpf(11420669, -107));
-  EXPECT_EQ(ToFloat("60419369.e-46"), ldexpf(8623340, -150));
-  EXPECT_EQ(ToFloat("702990899.e-20"), ldexpf(16209866, -61));
-  EXPECT_EQ(ToFloat("6930161142.e-48"), ldexpf(9891056, -150));
-  EXPECT_EQ(ToFloat("25933168707.e-13"), ldexpf(11138211, -32));
-  EXPECT_EQ(ToFloat("596428896559.e20"), ldexpf(12333860, 82));
-
-
-  EXPECT_EQ(ToDouble("9.e-265"), ldexp(8168427841980010, -930));
-  EXPECT_EQ(ToDouble("85.e-037"), ldexp(6360455125664090, -169));
-  EXPECT_EQ(ToDouble("623.e100"), ldexp(6263531988747231, 289));
-  EXPECT_EQ(ToDouble("3571.e263"), ldexp(6234526311072170, 833));
-  EXPECT_EQ(ToDouble("81661.e153"), ldexp(6696636728760206, 472));
-  EXPECT_EQ(ToDouble("920657.e-023"), ldexp(5975405561110124, -109));
-  EXPECT_EQ(ToDouble("4603285.e-024"), ldexp(5975405561110124, -110));
-  EXPECT_EQ(ToDouble("87575437.e-309"), ldexp(8452160731874668, -1053));
-  EXPECT_EQ(ToDouble("245540327.e122"), ldexp(4985336549131723, 381));
-  EXPECT_EQ(ToDouble("6138508175.e120"), ldexp(4985336549131723, 379));
-  EXPECT_EQ(ToDouble("83356057653.e193"), ldexp(5986732817132056, 625));
-  EXPECT_EQ(ToDouble("619534293513.e124"), ldexp(4798406992060657, 399));
-  EXPECT_EQ(ToDouble("2335141086879.e218"), ldexp(5419088166961646, 713));
-  EXPECT_EQ(ToDouble("36167929443327.e-159"), ldexp(8135819834632444, -536));
-  EXPECT_EQ(ToDouble("609610927149051.e-255"), ldexp(4576664294594737, -850));
-  EXPECT_EQ(ToDouble("3743626360493413.e-165"), ldexp(6898586531774201, -549));
-  EXPECT_EQ(ToDouble("94080055902682397.e-242"), ldexp(6273271706052298, -800));
-  EXPECT_EQ(ToDouble("899810892172646163.e283"), ldexp(7563892574477827, 947));
-  EXPECT_EQ(ToDouble("7120190517612959703.e120"), ldexp(5385467232557565, 409));
-  EXPECT_EQ(ToDouble("25188282901709339043.e-252"),
-            ldexp(5635662608542340, -825));
-  EXPECT_EQ(ToDouble("308984926168550152811.e-052"),
-            ldexp(5644774693823803, -157));
-  EXPECT_EQ(ToDouble("6372891218502368041059.e064"),
-            ldexp(4616868614322430, 233));
-
-  EXPECT_EQ(ToFloat("3.e-23"), ldexpf(9507380, -98));
-  EXPECT_EQ(ToFloat("57.e18"), ldexpf(12960300, 42));
-  EXPECT_EQ(ToFloat("789.e-35"), ldexpf(10739312, -130));
-  EXPECT_EQ(ToFloat("2539.e-18"), ldexpf(11990089, -72));
-  EXPECT_EQ(ToFloat("76173.e28"), ldexpf(9845130, 86));
-  EXPECT_EQ(ToFloat("887745.e-11"), ldexpf(9760860, -40));
-  EXPECT_EQ(ToFloat("5382571.e-37"), ldexpf(11447463, -124));
-  EXPECT_EQ(ToFloat("82381273.e-35"), ldexpf(8554961, -113));
-  EXPECT_EQ(ToFloat("750486563.e-38"), ldexpf(9975678, -120));
-  EXPECT_EQ(ToFloat("3752432815.e-39"), ldexpf(9975678, -121));
-  EXPECT_EQ(ToFloat("75224575729.e-45"), ldexpf(13105970, -137));
-  EXPECT_EQ(ToFloat("459926601011.e15"), ldexpf(12466336, 65));
-}
-
-// Common test logic for converting a string which lies exactly halfway between
-// two target floats.
-//
-// mantissa and exponent represent the precise value between two floating point
-// numbers, `expected_low` and `expected_high`.  The floating point
-// representation to parse in `StrCat(mantissa, "e", exponent)`.
-//
-// This function checks that an input just slightly less than the exact value
-// is rounded down to `expected_low`, and an input just slightly greater than
-// the exact value is rounded up to `expected_high`.
-//
-// The exact value should round to `expected_half`, which must be either
-// `expected_low` or `expected_high`.
-template <typename FloatType>
-void TestHalfwayValue(const std::string& mantissa, int exponent,
-                      FloatType expected_low, FloatType expected_high,
-                      FloatType expected_half) {
-  std::string low_rep = mantissa;
-  low_rep[low_rep.size() - 1] -= 1;
-  absl::StrAppend(&low_rep, std::string(1000, '9'), "e", exponent);
-
-  FloatType actual_low = 0;
-  absl::from_chars(low_rep.data(), low_rep.data() + low_rep.size(), actual_low);
-  EXPECT_EQ(expected_low, actual_low);
-
-  std::string high_rep =
-      absl::StrCat(mantissa, std::string(1000, '0'), "1e", exponent);
-  FloatType actual_high = 0;
-  absl::from_chars(high_rep.data(), high_rep.data() + high_rep.size(),
-                   actual_high);
-  EXPECT_EQ(expected_high, actual_high);
-
-  std::string halfway_rep = absl::StrCat(mantissa, "e", exponent);
-  FloatType actual_half = 0;
-  absl::from_chars(halfway_rep.data(), halfway_rep.data() + halfway_rep.size(),
-                   actual_half);
-  EXPECT_EQ(expected_half, actual_half);
-}
-
-TEST(FromChars, DoubleRounding) {
-  const double zero = 0.0;
-  const double first_subnormal = nextafter(zero, 1.0);
-  const double second_subnormal = nextafter(first_subnormal, 1.0);
-
-  const double first_normal = DBL_MIN;
-  const double last_subnormal = nextafter(first_normal, 0.0);
-  const double second_normal = nextafter(first_normal, 1.0);
-
-  const double last_normal = DBL_MAX;
-  const double penultimate_normal = nextafter(last_normal, 0.0);
-
-  // Various test cases for numbers between two representable floats.  Each
-  // call to TestHalfwayValue tests a number just below and just above the
-  // halfway point, as well as the number exactly between them.
-
-  // Test between zero and first_subnormal.  Round-to-even tie rounds down.
-  TestHalfwayValue(
-      "2."
-      "470328229206232720882843964341106861825299013071623822127928412503377536"
-      "351043759326499181808179961898982823477228588654633283551779698981993873"
-      "980053909390631503565951557022639229085839244910518443593180284993653615"
-      "250031937045767824921936562366986365848075700158576926990370631192827955"
-      "855133292783433840935197801553124659726357957462276646527282722005637400"
-      "648549997709659947045402082816622623785739345073633900796776193057750674"
-      "017632467360096895134053553745851666113422376667860416215968046191446729"
-      "184030053005753084904876539171138659164623952491262365388187963623937328"
-      "042389101867234849766823508986338858792562830275599565752445550725518931"
-      "369083625477918694866799496832404970582102851318545139621383772282614543"
-      "7693412532098591327667236328125",
-      -324, zero, first_subnormal, zero);
-
-  // first_subnormal and second_subnormal.  Round-to-even tie rounds up.
-  TestHalfwayValue(
-      "7."
-      "410984687618698162648531893023320585475897039214871466383785237510132609"
-      "053131277979497545424539885696948470431685765963899850655339096945981621"
-      "940161728171894510697854671067917687257517734731555330779540854980960845"
-      "750095811137303474765809687100959097544227100475730780971111893578483867"
-      "565399878350301522805593404659373979179073872386829939581848166016912201"
-      "945649993128979841136206248449867871357218035220901702390328579173252022"
-      "052897402080290685402160661237554998340267130003581248647904138574340187"
-      "552090159017259254714629617513415977493871857473787096164563890871811984"
-      "127167305601704549300470526959016576377688490826798697257336652176556794"
-      "107250876433756084600398490497214911746308553955635418864151316847843631"
-      "3080237596295773983001708984375",
-      -324, first_subnormal, second_subnormal, second_subnormal);
-
-  // last_subnormal and first_normal.  Round-to-even tie rounds up.
-  TestHalfwayValue(
-      "2."
-      "225073858507201136057409796709131975934819546351645648023426109724822222"
-      "021076945516529523908135087914149158913039621106870086438694594645527657"
-      "207407820621743379988141063267329253552286881372149012981122451451889849"
-      "057222307285255133155755015914397476397983411801999323962548289017107081"
-      "850690630666655994938275772572015763062690663332647565300009245888316433"
-      "037779791869612049497390377829704905051080609940730262937128958950003583"
-      "799967207254304360284078895771796150945516748243471030702609144621572289"
-      "880258182545180325707018860872113128079512233426288368622321503775666622"
-      "503982534335974568884423900265498198385487948292206894721689831099698365"
-      "846814022854243330660339850886445804001034933970427567186443383770486037"
-      "86162277173854562306587467901408672332763671875",
-      -308, last_subnormal, first_normal, first_normal);
-
-  // first_normal and second_normal.  Round-to-even tie rounds down.
-  TestHalfwayValue(
-      "2."
-      "225073858507201630123055637955676152503612414573018013083228724049586647"
-      "606759446192036794116886953213985520549032000903434781884412325572184367"
-      "563347617020518175998922941393629966742598285899994830148971433555578567"
-      "693279306015978183162142425067962460785295885199272493577688320732492479"
-      "924816869232247165964934329258783950102250973957579510571600738343645738"
-      "494324192997092179207389919761694314131497173265255020084997973676783743"
-      "155205818804439163810572367791175177756227497413804253387084478193655533"
-      "073867420834526162513029462022730109054820067654020201547112002028139700"
-      "141575259123440177362244273712468151750189745559978653234255886219611516"
-      "335924167958029604477064946470184777360934300451421683607013647479513962"
-      "13837722826145437693412532098591327667236328125",
-      -308, first_normal, second_normal, first_normal);
-
-  // penultimate_normal and last_normal.  Round-to-even rounds down.
-  TestHalfwayValue(
-      "1."
-      "797693134862315608353258760581052985162070023416521662616611746258695532"
-      "672923265745300992879465492467506314903358770175220871059269879629062776"
-      "047355692132901909191523941804762171253349609463563872612866401980290377"
-      "995141836029815117562837277714038305214839639239356331336428021390916694"
-      "57927874464075218944",
-      308, penultimate_normal, last_normal, penultimate_normal);
-}
-
-// Same test cases as DoubleRounding, now with new and improved Much Smaller
-// Precision!
-TEST(FromChars, FloatRounding) {
-  const float zero = 0.0;
-  const float first_subnormal = nextafterf(zero, 1.0);
-  const float second_subnormal = nextafterf(first_subnormal, 1.0);
-
-  const float first_normal = FLT_MIN;
-  const float last_subnormal = nextafterf(first_normal, 0.0);
-  const float second_normal = nextafterf(first_normal, 1.0);
-
-  const float last_normal = FLT_MAX;
-  const float penultimate_normal = nextafterf(last_normal, 0.0);
-
-  // Test between zero and first_subnormal.  Round-to-even tie rounds down.
-  TestHalfwayValue(
-      "7."
-      "006492321624085354618647916449580656401309709382578858785341419448955413"
-      "42930300743319094181060791015625",
-      -46, zero, first_subnormal, zero);
-
-  // first_subnormal and second_subnormal.  Round-to-even tie rounds up.
-  TestHalfwayValue(
-      "2."
-      "101947696487225606385594374934874196920392912814773657635602425834686624"
-      "028790902229957282543182373046875",
-      -45, first_subnormal, second_subnormal, second_subnormal);
-
-  // last_subnormal and first_normal.  Round-to-even tie rounds up.
-  TestHalfwayValue(
-      "1."
-      "175494280757364291727882991035766513322858992758990427682963118425003064"
-      "9651730385585324256680905818939208984375",
-      -38, last_subnormal, first_normal, first_normal);
-
-  // first_normal and second_normal.  Round-to-even tie rounds down.
-  TestHalfwayValue(
-      "1."
-      "175494420887210724209590083408724842314472120785184615334540294131831453"
-      "9442813071445925743319094181060791015625",
-      -38, first_normal, second_normal, first_normal);
-
-  // penultimate_normal and last_normal.  Round-to-even rounds down.
-  TestHalfwayValue("3.40282336497324057985868971510891282432", 38,
-                   penultimate_normal, last_normal, penultimate_normal);
-}
-
-TEST(FromChars, Underflow) {
-  // Check that underflow is handled correctly, according to the specification
-  // in DR 3081.
-  double d;
-  float f;
-  absl::from_chars_result result;
-
-  std::string negative_underflow = "-1e-1000";
-  const char* begin = negative_underflow.data();
-  const char* end = begin + negative_underflow.size();
-  d = 100.0;
-  result = absl::from_chars(begin, end, d);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_TRUE(std::signbit(d));  // negative
-  EXPECT_GE(d, -std::numeric_limits<double>::min());
-  f = 100.0;
-  result = absl::from_chars(begin, end, f);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_TRUE(std::signbit(f));  // negative
-  EXPECT_GE(f, -std::numeric_limits<float>::min());
-
-  std::string positive_underflow = "1e-1000";
-  begin = positive_underflow.data();
-  end = begin + positive_underflow.size();
-  d = -100.0;
-  result = absl::from_chars(begin, end, d);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_FALSE(std::signbit(d));  // positive
-  EXPECT_LE(d, std::numeric_limits<double>::min());
-  f = -100.0;
-  result = absl::from_chars(begin, end, f);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_FALSE(std::signbit(f));  // positive
-  EXPECT_LE(f, std::numeric_limits<float>::min());
-}
-
-TEST(FromChars, Overflow) {
-  // Check that overflow is handled correctly, according to the specification
-  // in DR 3081.
-  double d;
-  float f;
-  absl::from_chars_result result;
-
-  std::string negative_overflow = "-1e1000";
-  const char* begin = negative_overflow.data();
-  const char* end = begin + negative_overflow.size();
-  d = 100.0;
-  result = absl::from_chars(begin, end, d);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_TRUE(std::signbit(d));  // negative
-  EXPECT_EQ(d, -std::numeric_limits<double>::max());
-  f = 100.0;
-  result = absl::from_chars(begin, end, f);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_TRUE(std::signbit(f));  // negative
-  EXPECT_EQ(f, -std::numeric_limits<float>::max());
-
-  std::string positive_overflow = "1e1000";
-  begin = positive_overflow.data();
-  end = begin + positive_overflow.size();
-  d = -100.0;
-  result = absl::from_chars(begin, end, d);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_FALSE(std::signbit(d));  // positive
-  EXPECT_EQ(d, std::numeric_limits<double>::max());
-  f = -100.0;
-  result = absl::from_chars(begin, end, f);
-  EXPECT_EQ(result.ptr, end);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_FALSE(std::signbit(f));  // positive
-  EXPECT_EQ(f, std::numeric_limits<float>::max());
-}
-
-TEST(FromChars, RegressionTestsFromFuzzer) {
-  absl::string_view src = "0x21900000p00000000099";
-  float f;
-  auto result = absl::from_chars(src.data(), src.data() + src.size(), f);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-}
-
-TEST(FromChars, ReturnValuePtr) {
-  // Check that `ptr` points one past the number scanned, even if that number
-  // is not representable.
-  double d;
-  absl::from_chars_result result;
-
-  std::string normal = "3.14@#$%@#$%";
-  result = absl::from_chars(normal.data(), normal.data() + normal.size(), d);
-  EXPECT_EQ(result.ec, std::errc());
-  EXPECT_EQ(result.ptr - normal.data(), 4);
-
-  std::string overflow = "1e1000@#$%@#$%";
-  result = absl::from_chars(overflow.data(),
-                            overflow.data() + overflow.size(), d);
-  EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-  EXPECT_EQ(result.ptr - overflow.data(), 6);
-
-  std::string garbage = "#$%@#$%";
-  result = absl::from_chars(garbage.data(),
-                            garbage.data() + garbage.size(), d);
-  EXPECT_EQ(result.ec, std::errc::invalid_argument);
-  EXPECT_EQ(result.ptr - garbage.data(), 0);
-}
-
-// Check for a wide range of inputs that strtod() and absl::from_chars() exactly
-// agree on the conversion amount.
-//
-// This test assumes the platform's strtod() uses perfect round_to_nearest
-// rounding.
-TEST(FromChars, TestVersusStrtod) {
-  for (int mantissa = 1000000; mantissa <= 9999999; mantissa += 501) {
-    for (int exponent = -300; exponent < 300; ++exponent) {
-      std::string candidate = absl::StrCat(mantissa, "e", exponent);
-      double strtod_value = strtod(candidate.c_str(), nullptr);
-      double absl_value = 0;
-      absl::from_chars(candidate.data(), candidate.data() + candidate.size(),
-                       absl_value);
-      ASSERT_EQ(strtod_value, absl_value) << candidate;
-    }
-  }
-}
-
-// Check for a wide range of inputs that strtof() and absl::from_chars() exactly
-// agree on the conversion amount.
-//
-// This test assumes the platform's strtof() uses perfect round_to_nearest
-// rounding.
-TEST(FromChars, TestVersusStrtof) {
-  for (int mantissa = 1000000; mantissa <= 9999999; mantissa += 501) {
-    for (int exponent = -43; exponent < 32; ++exponent) {
-      std::string candidate = absl::StrCat(mantissa, "e", exponent);
-      float strtod_value = strtof(candidate.c_str(), nullptr);
-      float absl_value = 0;
-      absl::from_chars(candidate.data(), candidate.data() + candidate.size(),
-                       absl_value);
-      ASSERT_EQ(strtod_value, absl_value) << candidate;
-    }
-  }
-}
-
-// Tests if two floating point values have identical bit layouts.  (EXPECT_EQ
-// is not suitable for NaN testing, since NaNs are never equal.)
-template <typename Float>
-bool Identical(Float a, Float b) {
-  return 0 == memcmp(&a, &b, sizeof(Float));
-}
-
-// Check that NaNs are parsed correctly.  The spec requires that
-// std::from_chars on "NaN(123abc)" return the same value as std::nan("123abc").
-// How such an n-char-sequence affects the generated NaN is unspecified, so we
-// just test for symmetry with std::nan and strtod here.
-//
-// (In Linux, this parses the value as a number and stuffs that number into the
-// free bits of a quiet NaN.)
-TEST(FromChars, NaNDoubles) {
-  for (std::string n_char_sequence :
-       {"", "1", "2", "3", "fff", "FFF", "200000", "400000", "4000000000000",
-        "8000000000000", "abc123", "legal_but_unexpected",
-        "99999999999999999999999", "_"}) {
-    std::string input = absl::StrCat("nan(", n_char_sequence, ")");
-    SCOPED_TRACE(input);
-    double from_chars_double;
-    absl::from_chars(input.data(), input.data() + input.size(),
-                     from_chars_double);
-    double std_nan_double = std::nan(n_char_sequence.c_str());
-    EXPECT_TRUE(Identical(from_chars_double, std_nan_double));
-
-    // Also check that we match strtod()'s behavior.  This test assumes that the
-    // platform has a compliant strtod().
-#if ABSL_STRTOD_HANDLES_NAN_CORRECTLY
-    double strtod_double = strtod(input.c_str(), nullptr);
-    EXPECT_TRUE(Identical(from_chars_double, strtod_double));
-#endif  // ABSL_STRTOD_HANDLES_NAN_CORRECTLY
-
-    // Check that we can parse a negative NaN
-    std::string negative_input = "-" + input;
-    double negative_from_chars_double;
-    absl::from_chars(negative_input.data(),
-                     negative_input.data() + negative_input.size(),
-                     negative_from_chars_double);
-    EXPECT_TRUE(std::signbit(negative_from_chars_double));
-    EXPECT_FALSE(Identical(negative_from_chars_double, from_chars_double));
-    from_chars_double = std::copysign(from_chars_double, -1.0);
-    EXPECT_TRUE(Identical(negative_from_chars_double, from_chars_double));
-  }
-}
-
-TEST(FromChars, NaNFloats) {
-  for (std::string n_char_sequence :
-       {"", "1", "2", "3", "fff", "FFF", "200000", "400000", "4000000000000",
-        "8000000000000", "abc123", "legal_but_unexpected",
-        "99999999999999999999999", "_"}) {
-    std::string input = absl::StrCat("nan(", n_char_sequence, ")");
-    SCOPED_TRACE(input);
-    float from_chars_float;
-    absl::from_chars(input.data(), input.data() + input.size(),
-                     from_chars_float);
-    float std_nan_float = std::nanf(n_char_sequence.c_str());
-    EXPECT_TRUE(Identical(from_chars_float, std_nan_float));
-
-    // Also check that we match strtof()'s behavior.  This test assumes that the
-    // platform has a compliant strtof().
-#if ABSL_STRTOD_HANDLES_NAN_CORRECTLY
-    float strtof_float = strtof(input.c_str(), nullptr);
-    EXPECT_TRUE(Identical(from_chars_float, strtof_float));
-#endif  // ABSL_STRTOD_HANDLES_NAN_CORRECTLY
-
-    // Check that we can parse a negative NaN
-    std::string negative_input = "-" + input;
-    float negative_from_chars_float;
-    absl::from_chars(negative_input.data(),
-                     negative_input.data() + negative_input.size(),
-                     negative_from_chars_float);
-    EXPECT_TRUE(std::signbit(negative_from_chars_float));
-    EXPECT_FALSE(Identical(negative_from_chars_float, from_chars_float));
-    // Use the (float, float) overload of std::copysign to prevent narrowing;
-    // see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98251.
-    from_chars_float = std::copysign(from_chars_float, -1.0f);
-    EXPECT_TRUE(Identical(negative_from_chars_float, from_chars_float));
-  }
-}
-
-// Returns an integer larger than step.  The values grow exponentially.
-int NextStep(int step) {
-  return step + (step >> 2) + 1;
-}
-
-// Test a conversion on a family of input strings, checking that the calculation
-// is correct for in-bounds values, and that overflow and underflow are done
-// correctly for out-of-bounds values.
-//
-// input_generator maps from an integer index to a string to test.
-// expected_generator maps from an integer index to an expected Float value.
-// from_chars conversion of input_generator(i) should result in
-// expected_generator(i).
-//
-// lower_bound and upper_bound denote the smallest and largest values for which
-// the conversion is expected to succeed.
-template <typename Float>
-void TestOverflowAndUnderflow(
-    const std::function<std::string(int)>& input_generator,
-    const std::function<Float(int)>& expected_generator, int lower_bound,
-    int upper_bound) {
-  // test legal values near lower_bound
-  int index, step;
-  for (index = lower_bound, step = 1; index < upper_bound;
-       index += step, step = NextStep(step)) {
-    std::string input = input_generator(index);
-    SCOPED_TRACE(input);
-    Float expected = expected_generator(index);
-    Float actual;
-    auto result =
-        absl::from_chars(input.data(), input.data() + input.size(), actual);
-    EXPECT_EQ(result.ec, std::errc());
-    EXPECT_EQ(expected, actual)
-        << absl::StrFormat("%a vs %a", expected, actual);
-  }
-  // test legal values near upper_bound
-  for (index = upper_bound, step = 1; index > lower_bound;
-       index -= step, step = NextStep(step)) {
-    std::string input = input_generator(index);
-    SCOPED_TRACE(input);
-    Float expected = expected_generator(index);
-    Float actual;
-    auto result =
-        absl::from_chars(input.data(), input.data() + input.size(), actual);
-    EXPECT_EQ(result.ec, std::errc());
-    EXPECT_EQ(expected, actual)
-        << absl::StrFormat("%a vs %a", expected, actual);
-  }
-  // Test underflow values below lower_bound
-  for (index = lower_bound - 1, step = 1; index > -1000000;
-       index -= step, step = NextStep(step)) {
-    std::string input = input_generator(index);
-    SCOPED_TRACE(input);
-    Float actual;
-    auto result =
-        absl::from_chars(input.data(), input.data() + input.size(), actual);
-    EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-    EXPECT_LT(actual, 1.0);  // check for underflow
-  }
-  // Test overflow values above upper_bound
-  for (index = upper_bound + 1, step = 1; index < 1000000;
-       index += step, step = NextStep(step)) {
-    std::string input = input_generator(index);
-    SCOPED_TRACE(input);
-    Float actual;
-    auto result =
-        absl::from_chars(input.data(), input.data() + input.size(), actual);
-    EXPECT_EQ(result.ec, std::errc::result_out_of_range);
-    EXPECT_GT(actual, 1.0);  // check for overflow
-  }
-}
-
-// Check that overflow and underflow are caught correctly for hex doubles.
-//
-// The largest representable double is 0x1.fffffffffffffp+1023, and the
-// smallest representable subnormal is 0x0.0000000000001p-1022, which equals
-// 0x1p-1074.  Therefore 1023 and -1074 are the limits of acceptable exponents
-// in this test.
-TEST(FromChars, HexdecimalDoubleLimits) {
-  auto input_gen = [](int index) { return absl::StrCat("0x1.0p", index); };
-  auto expected_gen = [](int index) { return std::ldexp(1.0, index); };
-  TestOverflowAndUnderflow<double>(input_gen, expected_gen, -1074, 1023);
-}
-
-// Check that overflow and underflow are caught correctly for hex floats.
-//
-// The largest representable float is 0x1.fffffep+127, and the smallest
-// representable subnormal is 0x0.000002p-126, which equals 0x1p-149.
-// Therefore 127 and -149 are the limits of acceptable exponents in this test.
-TEST(FromChars, HexdecimalFloatLimits) {
-  auto input_gen = [](int index) { return absl::StrCat("0x1.0p", index); };
-  auto expected_gen = [](int index) { return std::ldexp(1.0f, index); };
-  TestOverflowAndUnderflow<float>(input_gen, expected_gen, -149, 127);
-}
-
-// Check that overflow and underflow are caught correctly for decimal doubles.
-//
-// The largest representable double is about 1.8e308, and the smallest
-// representable subnormal is about 5e-324.  '1e-324' therefore rounds away from
-// the smallest representable positive value.  -323 and 308 are the limits of
-// acceptable exponents in this test.
-TEST(FromChars, DecimalDoubleLimits) {
-  auto input_gen = [](int index) { return absl::StrCat("1.0e", index); };
-  auto expected_gen = [](int index) { return Pow10(index); };
-  TestOverflowAndUnderflow<double>(input_gen, expected_gen, -323, 308);
-}
-
-// Check that overflow and underflow are caught correctly for decimal floats.
-//
-// The largest representable float is about 3.4e38, and the smallest
-// representable subnormal is about 1.45e-45.  '1e-45' therefore rounds towards
-// the smallest representable positive value.  -45 and 38 are the limits of
-// acceptable exponents in this test.
-TEST(FromChars, DecimalFloatLimits) {
-  auto input_gen = [](int index) { return absl::StrCat("1.0e", index); };
-  auto expected_gen = [](int index) { return Pow10(index); };
-  TestOverflowAndUnderflow<float>(input_gen, expected_gen, -45, 38);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/cord.cc b/third_party/abseil/absl/strings/cord.cc
deleted file mode 100644
index 7cadf75..0000000
--- a/third_party/abseil/absl/strings/cord.cc
+++ /dev/null
@@ -1,1825 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/cord.h"
-
-#include <algorithm>
-#include <atomic>
-#include <cstddef>
-#include <cstdio>
-#include <cstdlib>
-#include <iomanip>
-#include <iostream>
-#include <limits>
-#include <ostream>
-#include <sstream>
-#include <type_traits>
-#include <unordered_set>
-#include <vector>
-
-#include "absl/base/casts.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/container/fixed_array.h"
-#include "absl/container/inlined_vector.h"
-#include "absl/strings/escaping.h"
-#include "absl/strings/internal/cord_internal.h"
-#include "absl/strings/internal/cord_rep_flat.h"
-#include "absl/strings/internal/resize_uninitialized.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_join.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-using ::absl::cord_internal::CordRep;
-using ::absl::cord_internal::CordRepConcat;
-using ::absl::cord_internal::CordRepExternal;
-using ::absl::cord_internal::CordRepFlat;
-using ::absl::cord_internal::CordRepSubstring;
-
-using ::absl::cord_internal::kMinFlatLength;
-using ::absl::cord_internal::kMaxFlatLength;
-
-using ::absl::cord_internal::CONCAT;
-using ::absl::cord_internal::EXTERNAL;
-using ::absl::cord_internal::FLAT;
-using ::absl::cord_internal::RING;
-using ::absl::cord_internal::SUBSTRING;
-
-using ::absl::cord_internal::kInlinedVectorSize;
-using ::absl::cord_internal::kMaxBytesToCopy;
-
-constexpr uint64_t Fibonacci(unsigned char n, uint64_t a = 0, uint64_t b = 1) {
-  return n == 0 ? a : Fibonacci(n - 1, b, a + b);
-}
-
-static_assert(Fibonacci(63) == 6557470319842,
-              "Fibonacci values computed incorrectly");
-
-// Minimum length required for a given depth tree -- a tree is considered
-// balanced if
-//      length(t) >= min_length[depth(t)]
-// The root node depth is allowed to become twice as large to reduce rebalancing
-// for larger strings (see IsRootBalanced).
-static constexpr uint64_t min_length[] = {
-    Fibonacci(2),          Fibonacci(3),  Fibonacci(4),  Fibonacci(5),
-    Fibonacci(6),          Fibonacci(7),  Fibonacci(8),  Fibonacci(9),
-    Fibonacci(10),         Fibonacci(11), Fibonacci(12), Fibonacci(13),
-    Fibonacci(14),         Fibonacci(15), Fibonacci(16), Fibonacci(17),
-    Fibonacci(18),         Fibonacci(19), Fibonacci(20), Fibonacci(21),
-    Fibonacci(22),         Fibonacci(23), Fibonacci(24), Fibonacci(25),
-    Fibonacci(26),         Fibonacci(27), Fibonacci(28), Fibonacci(29),
-    Fibonacci(30),         Fibonacci(31), Fibonacci(32), Fibonacci(33),
-    Fibonacci(34),         Fibonacci(35), Fibonacci(36), Fibonacci(37),
-    Fibonacci(38),         Fibonacci(39), Fibonacci(40), Fibonacci(41),
-    Fibonacci(42),         Fibonacci(43), Fibonacci(44), Fibonacci(45),
-    Fibonacci(46),         Fibonacci(47),
-    0xffffffffffffffffull,  // Avoid overflow
-};
-
-static const int kMinLengthSize = ABSL_ARRAYSIZE(min_length);
-
-static inline bool IsRootBalanced(CordRep* node) {
-  if (node->tag != CONCAT) {
-    return true;
-  } else if (node->concat()->depth() <= 15) {
-    return true;
-  } else if (node->concat()->depth() > kMinLengthSize) {
-    return false;
-  } else {
-    // Allow depth to become twice as large as implied by fibonacci rule to
-    // reduce rebalancing for larger strings.
-    return (node->length >= min_length[node->concat()->depth() / 2]);
-  }
-}
-
-static CordRep* Rebalance(CordRep* node);
-static void DumpNode(CordRep* rep, bool include_data, std::ostream* os);
-static bool VerifyNode(CordRep* root, CordRep* start_node,
-                       bool full_validation);
-
-static inline CordRep* VerifyTree(CordRep* node) {
-  // Verification is expensive, so only do it in debug mode.
-  // Even in debug mode we normally do only light validation.
-  // If you are debugging Cord itself, you should define the
-  // macro EXTRA_CORD_VALIDATION, e.g. by adding
-  // --copt=-DEXTRA_CORD_VALIDATION to the blaze line.
-#ifdef EXTRA_CORD_VALIDATION
-  assert(node == nullptr || VerifyNode(node, node, /*full_validation=*/true));
-#else   // EXTRA_CORD_VALIDATION
-  assert(node == nullptr || VerifyNode(node, node, /*full_validation=*/false));
-#endif  // EXTRA_CORD_VALIDATION
-  static_cast<void>(&VerifyNode);
-
-  return node;
-}
-
-// Return the depth of a node
-static int Depth(const CordRep* rep) {
-  if (rep->tag == CONCAT) {
-    return rep->concat()->depth();
-  } else {
-    return 0;
-  }
-}
-
-static void SetConcatChildren(CordRepConcat* concat, CordRep* left,
-                              CordRep* right) {
-  concat->left = left;
-  concat->right = right;
-
-  concat->length = left->length + right->length;
-  concat->set_depth(1 + std::max(Depth(left), Depth(right)));
-}
-
-// Create a concatenation of the specified nodes.
-// Does not change the refcounts of "left" and "right".
-// The returned node has a refcount of 1.
-static CordRep* RawConcat(CordRep* left, CordRep* right) {
-  // Avoid making degenerate concat nodes (one child is empty)
-  if (left == nullptr) return right;
-  if (right == nullptr) return left;
-  if (left->length == 0) {
-    CordRep::Unref(left);
-    return right;
-  }
-  if (right->length == 0) {
-    CordRep::Unref(right);
-    return left;
-  }
-
-  CordRepConcat* rep = new CordRepConcat();
-  rep->tag = CONCAT;
-  SetConcatChildren(rep, left, right);
-
-  return rep;
-}
-
-static CordRep* Concat(CordRep* left, CordRep* right) {
-  CordRep* rep = RawConcat(left, right);
-  if (rep != nullptr && !IsRootBalanced(rep)) {
-    rep = Rebalance(rep);
-  }
-  return VerifyTree(rep);
-}
-
-// Make a balanced tree out of an array of leaf nodes.
-static CordRep* MakeBalancedTree(CordRep** reps, size_t n) {
-  // Make repeated passes over the array, merging adjacent pairs
-  // until we are left with just a single node.
-  while (n > 1) {
-    size_t dst = 0;
-    for (size_t src = 0; src < n; src += 2) {
-      if (src + 1 < n) {
-        reps[dst] = Concat(reps[src], reps[src + 1]);
-      } else {
-        reps[dst] = reps[src];
-      }
-      dst++;
-    }
-    n = dst;
-  }
-
-  return reps[0];
-}
-
-// Create a new tree out of the specified array.
-// The returned node has a refcount of 1.
-static CordRep* NewTree(const char* data,
-                        size_t length,
-                        size_t alloc_hint) {
-  if (length == 0) return nullptr;
-  absl::FixedArray<CordRep*> reps((length - 1) / kMaxFlatLength + 1);
-  size_t n = 0;
-  do {
-    const size_t len = std::min(length, kMaxFlatLength);
-    CordRep* rep = CordRepFlat::New(len + alloc_hint);
-    rep->length = len;
-    memcpy(rep->data, data, len);
-    reps[n++] = VerifyTree(rep);
-    data += len;
-    length -= len;
-  } while (length != 0);
-  return MakeBalancedTree(reps.data(), n);
-}
-
-namespace cord_internal {
-
-void InitializeCordRepExternal(absl::string_view data, CordRepExternal* rep) {
-  assert(!data.empty());
-  rep->length = data.size();
-  rep->tag = EXTERNAL;
-  rep->base = data.data();
-  VerifyTree(rep);
-}
-
-}  // namespace cord_internal
-
-static CordRep* NewSubstring(CordRep* child, size_t offset, size_t length) {
-  // Never create empty substring nodes
-  if (length == 0) {
-    CordRep::Unref(child);
-    return nullptr;
-  } else {
-    CordRepSubstring* rep = new CordRepSubstring();
-    assert((offset + length) <= child->length);
-    rep->length = length;
-    rep->tag = SUBSTRING;
-    rep->start = offset;
-    rep->child = child;
-    return VerifyTree(rep);
-  }
-}
-
-// --------------------------------------------------------------------
-// Cord::InlineRep functions
-
-constexpr unsigned char Cord::InlineRep::kMaxInline;
-
-inline void Cord::InlineRep::set_data(const char* data, size_t n,
-                                      bool nullify_tail) {
-  static_assert(kMaxInline == 15, "set_data is hard-coded for a length of 15");
-
-  cord_internal::SmallMemmove(data_.as_chars, data, n, nullify_tail);
-  set_tagged_size(static_cast<char>(n));
-}
-
-inline char* Cord::InlineRep::set_data(size_t n) {
-  assert(n <= kMaxInline);
-  ResetToEmpty();
-  set_tagged_size(static_cast<char>(n));
-  return data_.as_chars;
-}
-
-inline CordRep* Cord::InlineRep::force_tree(size_t extra_hint) {
-  size_t len = tagged_size();
-  if (len > kMaxInline) {
-    return data_.as_tree.rep;
-  }
-
-  CordRep* result = CordRepFlat::New(len + extra_hint);
-  result->length = len;
-  static_assert(kMinFlatLength >= sizeof(data_.as_chars), "");
-  memcpy(result->data, data_.as_chars, sizeof(data_.as_chars));
-  set_tree(result);
-  return result;
-}
-
-inline void Cord::InlineRep::reduce_size(size_t n) {
-  size_t tag = tagged_size();
-  assert(tag <= kMaxInline);
-  assert(tag >= n);
-  tag -= n;
-  memset(data_.as_chars + tag, 0, n);
-  set_tagged_size(static_cast<char>(tag));
-}
-
-inline void Cord::InlineRep::remove_prefix(size_t n) {
-  cord_internal::SmallMemmove(data_.as_chars, data_.as_chars + n,
-                              tagged_size() - n);
-  reduce_size(n);
-}
-
-void Cord::InlineRep::AppendTree(CordRep* tree) {
-  if (tree == nullptr) return;
-  size_t len = tagged_size();
-  if (len == 0) {
-    set_tree(tree);
-  } else {
-    set_tree(Concat(force_tree(0), tree));
-  }
-}
-
-void Cord::InlineRep::PrependTree(CordRep* tree) {
-  assert(tree != nullptr);
-  size_t len = tagged_size();
-  if (len == 0) {
-    set_tree(tree);
-  } else {
-    set_tree(Concat(tree, force_tree(0)));
-  }
-}
-
-// Searches for a non-full flat node at the rightmost leaf of the tree. If a
-// suitable leaf is found, the function will update the length field for all
-// nodes to account for the size increase. The append region address will be
-// written to region and the actual size increase will be written to size.
-static inline bool PrepareAppendRegion(CordRep* root, char** region,
-                                       size_t* size, size_t max_length) {
-  // Search down the right-hand path for a non-full FLAT node.
-  CordRep* dst = root;
-  while (dst->tag == CONCAT && dst->refcount.IsOne()) {
-    dst = dst->concat()->right;
-  }
-
-  if (dst->tag < FLAT || !dst->refcount.IsOne()) {
-    *region = nullptr;
-    *size = 0;
-    return false;
-  }
-
-  const size_t in_use = dst->length;
-  const size_t capacity = dst->flat()->Capacity();
-  if (in_use == capacity) {
-    *region = nullptr;
-    *size = 0;
-    return false;
-  }
-
-  size_t size_increase = std::min(capacity - in_use, max_length);
-
-  // We need to update the length fields for all nodes, including the leaf node.
-  for (CordRep* rep = root; rep != dst; rep = rep->concat()->right) {
-    rep->length += size_increase;
-  }
-  dst->length += size_increase;
-
-  *region = dst->data + in_use;
-  *size = size_increase;
-  return true;
-}
-
-void Cord::InlineRep::GetAppendRegion(char** region, size_t* size,
-                                      size_t max_length) {
-  if (max_length == 0) {
-    *region = nullptr;
-    *size = 0;
-    return;
-  }
-
-  // Try to fit in the inline buffer if possible.
-  size_t inline_length = tagged_size();
-  if (inline_length < kMaxInline && max_length <= kMaxInline - inline_length) {
-    *region = data_.as_chars + inline_length;
-    *size = max_length;
-    set_tagged_size(static_cast<char>(inline_length + max_length));
-    return;
-  }
-
-  CordRep* root = force_tree(max_length);
-
-  if (PrepareAppendRegion(root, region, size, max_length)) {
-    return;
-  }
-
-  // Allocate new node.
-  CordRepFlat* new_node =
-      CordRepFlat::New(std::max(static_cast<size_t>(root->length), max_length));
-  new_node->length = std::min(new_node->Capacity(), max_length);
-  *region = new_node->data;
-  *size = new_node->length;
-  replace_tree(Concat(root, new_node));
-}
-
-void Cord::InlineRep::GetAppendRegion(char** region, size_t* size) {
-  const size_t max_length = std::numeric_limits<size_t>::max();
-
-  // Try to fit in the inline buffer if possible.
-  size_t inline_length = tagged_size();
-  if (inline_length < kMaxInline) {
-    *region = data_.as_chars + inline_length;
-    *size = kMaxInline - inline_length;
-    set_tagged_size(kMaxInline);
-    return;
-  }
-
-  CordRep* root = force_tree(max_length);
-
-  if (PrepareAppendRegion(root, region, size, max_length)) {
-    return;
-  }
-
-  // Allocate new node.
-  CordRepFlat* new_node = CordRepFlat::New(root->length);
-  new_node->length = new_node->Capacity();
-  *region = new_node->data;
-  *size = new_node->length;
-  replace_tree(Concat(root, new_node));
-}
-
-// If the rep is a leaf, this will increment the value at total_mem_usage and
-// will return true.
-static bool RepMemoryUsageLeaf(const CordRep* rep, size_t* total_mem_usage) {
-  if (rep->tag >= FLAT) {
-    *total_mem_usage += rep->flat()->AllocatedSize();
-    return true;
-  }
-  if (rep->tag == EXTERNAL) {
-    *total_mem_usage += sizeof(CordRepConcat) + rep->length;
-    return true;
-  }
-  return false;
-}
-
-void Cord::InlineRep::AssignSlow(const Cord::InlineRep& src) {
-  ClearSlow();
-
-  data_ = src.data_;
-  if (is_tree()) {
-    CordRep::Ref(tree());
-  }
-}
-
-void Cord::InlineRep::ClearSlow() {
-  if (is_tree()) {
-    CordRep::Unref(tree());
-  }
-  ResetToEmpty();
-}
-
-// --------------------------------------------------------------------
-// Constructors and destructors
-
-Cord::Cord(const Cord& src) : contents_(src.contents_) {
-  if (CordRep* tree = contents_.tree()) {
-    CordRep::Ref(tree);
-  }
-}
-
-Cord::Cord(absl::string_view src) {
-  const size_t n = src.size();
-  if (n <= InlineRep::kMaxInline) {
-    contents_.set_data(src.data(), n, false);
-  } else {
-    contents_.set_tree(NewTree(src.data(), n, 0));
-  }
-}
-
-template <typename T, Cord::EnableIfString<T>>
-Cord::Cord(T&& src) {
-  if (
-      // String is short: copy data to avoid external block overhead.
-      src.size() <= kMaxBytesToCopy ||
-      // String is wasteful: copy data to avoid pinning too much unused memory.
-      src.size() < src.capacity() / 2
-  ) {
-    if (src.size() <= InlineRep::kMaxInline) {
-      contents_.set_data(src.data(), src.size(), false);
-    } else {
-      contents_.set_tree(NewTree(src.data(), src.size(), 0));
-    }
-  } else {
-    struct StringReleaser {
-      void operator()(absl::string_view /* data */) {}
-      std::string data;
-    };
-    const absl::string_view original_data = src;
-    auto* rep = static_cast<
-        ::absl::cord_internal::CordRepExternalImpl<StringReleaser>*>(
-        absl::cord_internal::NewExternalRep(
-            original_data, StringReleaser{std::forward<T>(src)}));
-    // Moving src may have invalidated its data pointer, so adjust it.
-    rep->base = rep->template get<0>().data.data();
-    contents_.set_tree(rep);
-  }
-}
-
-template Cord::Cord(std::string&& src);
-
-// The destruction code is separate so that the compiler can determine
-// that it does not need to call the destructor on a moved-from Cord.
-void Cord::DestroyCordSlow() {
-  if (CordRep* tree = contents_.tree()) {
-    CordRep::Unref(VerifyTree(tree));
-  }
-}
-
-// --------------------------------------------------------------------
-// Mutators
-
-void Cord::Clear() {
-  if (CordRep* tree = contents_.clear()) {
-    CordRep::Unref(tree);
-  }
-}
-
-Cord& Cord::operator=(absl::string_view src) {
-
-  const char* data = src.data();
-  size_t length = src.size();
-  CordRep* tree = contents_.tree();
-  if (length <= InlineRep::kMaxInline) {
-    // Embed into this->contents_
-    contents_.set_data(data, length, true);
-    if (tree) CordRep::Unref(tree);
-    return *this;
-  }
-  if (tree != nullptr && tree->tag >= FLAT &&
-      tree->flat()->Capacity() >= length &&
-      tree->refcount.IsOne()) {
-    // Copy in place if the existing FLAT node is reusable.
-    memmove(tree->data, data, length);
-    tree->length = length;
-    VerifyTree(tree);
-    return *this;
-  }
-  contents_.set_tree(NewTree(data, length, 0));
-  if (tree) CordRep::Unref(tree);
-  return *this;
-}
-
-template <typename T, Cord::EnableIfString<T>>
-Cord& Cord::operator=(T&& src) {
-  if (src.size() <= kMaxBytesToCopy) {
-    *this = absl::string_view(src);
-  } else {
-    *this = Cord(std::forward<T>(src));
-  }
-  return *this;
-}
-
-template Cord& Cord::operator=(std::string&& src);
-
-// TODO(sanjay): Move to Cord::InlineRep section of file.  For now,
-// we keep it here to make diffs easier.
-void Cord::InlineRep::AppendArray(const char* src_data, size_t src_size) {
-  if (src_size == 0) return;  // memcpy(_, nullptr, 0) is undefined.
-  // Try to fit in the inline buffer if possible.
-  size_t inline_length = tagged_size();
-  if (inline_length < kMaxInline && src_size <= kMaxInline - inline_length) {
-    // Append new data to embedded array
-    set_tagged_size(static_cast<char>(inline_length + src_size));
-    memcpy(data_.as_chars + inline_length, src_data, src_size);
-    return;
-  }
-
-  CordRep* root = tree();
-
-  size_t appended = 0;
-  if (root) {
-    char* region;
-    if (PrepareAppendRegion(root, &region, &appended, src_size)) {
-      memcpy(region, src_data, appended);
-    }
-  } else {
-    // It is possible that src_data == data_, but when we transition from an
-    // InlineRep to a tree we need to assign data_ = root via set_tree. To
-    // avoid corrupting the source data before we copy it, delay calling
-    // set_tree until after we've copied data.
-    // We are going from an inline size to beyond inline size. Make the new size
-    // either double the inlined size, or the added size + 10%.
-    const size_t size1 = inline_length * 2 + src_size;
-    const size_t size2 = inline_length + src_size / 10;
-    root = CordRepFlat::New(std::max<size_t>(size1, size2));
-    appended = std::min(
-        src_size, root->flat()->Capacity() - inline_length);
-    memcpy(root->data, data_.as_chars, inline_length);
-    memcpy(root->data + inline_length, src_data, appended);
-    root->length = inline_length + appended;
-    set_tree(root);
-  }
-
-  src_data += appended;
-  src_size -= appended;
-  if (src_size == 0) {
-    return;
-  }
-
-  // Use new block(s) for any remaining bytes that were not handled above.
-  // Alloc extra memory only if the right child of the root of the new tree is
-  // going to be a FLAT node, which will permit further inplace appends.
-  size_t length = src_size;
-  if (src_size < kMaxFlatLength) {
-    // The new length is either
-    // - old size + 10%
-    // - old_size + src_size
-    // This will cause a reasonable conservative step-up in size that is still
-    // large enough to avoid excessive amounts of small fragments being added.
-    length = std::max<size_t>(root->length / 10, src_size);
-  }
-  set_tree(Concat(root, NewTree(src_data, src_size, length - src_size)));
-}
-
-inline CordRep* Cord::TakeRep() const& {
-  return CordRep::Ref(contents_.tree());
-}
-
-inline CordRep* Cord::TakeRep() && {
-  CordRep* rep = contents_.tree();
-  contents_.clear();
-  return rep;
-}
-
-template <typename C>
-inline void Cord::AppendImpl(C&& src) {
-  if (empty()) {
-    // In case of an empty destination avoid allocating a new node, do not copy
-    // data.
-    *this = std::forward<C>(src);
-    return;
-  }
-
-  // For short cords, it is faster to copy data if there is room in dst.
-  const size_t src_size = src.contents_.size();
-  if (src_size <= kMaxBytesToCopy) {
-    CordRep* src_tree = src.contents_.tree();
-    if (src_tree == nullptr) {
-      // src has embedded data.
-      contents_.AppendArray(src.contents_.data(), src_size);
-      return;
-    }
-    if (src_tree->tag >= FLAT) {
-      // src tree just has one flat node.
-      contents_.AppendArray(src_tree->data, src_size);
-      return;
-    }
-    if (&src == this) {
-      // ChunkIterator below assumes that src is not modified during traversal.
-      Append(Cord(src));
-      return;
-    }
-    // TODO(mec): Should we only do this if "dst" has space?
-    for (absl::string_view chunk : src.Chunks()) {
-      Append(chunk);
-    }
-    return;
-  }
-
-  // Guaranteed to be a tree (kMaxBytesToCopy > kInlinedSize)
-  contents_.AppendTree(std::forward<C>(src).TakeRep());
-}
-
-void Cord::Append(const Cord& src) { AppendImpl(src); }
-
-void Cord::Append(Cord&& src) { AppendImpl(std::move(src)); }
-
-template <typename T, Cord::EnableIfString<T>>
-void Cord::Append(T&& src) {
-  if (src.size() <= kMaxBytesToCopy) {
-    Append(absl::string_view(src));
-  } else {
-    Append(Cord(std::forward<T>(src)));
-  }
-}
-
-template void Cord::Append(std::string&& src);
-
-void Cord::Prepend(const Cord& src) {
-  CordRep* src_tree = src.contents_.tree();
-  if (src_tree != nullptr) {
-    CordRep::Ref(src_tree);
-    contents_.PrependTree(src_tree);
-    return;
-  }
-
-  // `src` cord is inlined.
-  absl::string_view src_contents(src.contents_.data(), src.contents_.size());
-  return Prepend(src_contents);
-}
-
-void Cord::Prepend(absl::string_view src) {
-  if (src.empty()) return;  // memcpy(_, nullptr, 0) is undefined.
-  size_t cur_size = contents_.size();
-  if (!contents_.is_tree() && cur_size + src.size() <= InlineRep::kMaxInline) {
-    // Use embedded storage.
-    char data[InlineRep::kMaxInline + 1] = {0};
-    data[InlineRep::kMaxInline] = cur_size + src.size();  // set size
-    memcpy(data, src.data(), src.size());
-    memcpy(data + src.size(), contents_.data(), cur_size);
-    memcpy(reinterpret_cast<void*>(&contents_), data,
-           InlineRep::kMaxInline + 1);
-  } else {
-    contents_.PrependTree(NewTree(src.data(), src.size(), 0));
-  }
-}
-
-template <typename T, Cord::EnableIfString<T>>
-inline void Cord::Prepend(T&& src) {
-  if (src.size() <= kMaxBytesToCopy) {
-    Prepend(absl::string_view(src));
-  } else {
-    Prepend(Cord(std::forward<T>(src)));
-  }
-}
-
-template void Cord::Prepend(std::string&& src);
-
-static CordRep* RemovePrefixFrom(CordRep* node, size_t n) {
-  if (n >= node->length) return nullptr;
-  if (n == 0) return CordRep::Ref(node);
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> rhs_stack;
-
-  while (node->tag == CONCAT) {
-    assert(n <= node->length);
-    if (n < node->concat()->left->length) {
-      // Push right to stack, descend left.
-      rhs_stack.push_back(node->concat()->right);
-      node = node->concat()->left;
-    } else {
-      // Drop left, descend right.
-      n -= node->concat()->left->length;
-      node = node->concat()->right;
-    }
-  }
-  assert(n <= node->length);
-
-  if (n == 0) {
-    CordRep::Ref(node);
-  } else {
-    size_t start = n;
-    size_t len = node->length - n;
-    if (node->tag == SUBSTRING) {
-      // Consider in-place update of node, similar to in RemoveSuffixFrom().
-      start += node->substring()->start;
-      node = node->substring()->child;
-    }
-    node = NewSubstring(CordRep::Ref(node), start, len);
-  }
-  while (!rhs_stack.empty()) {
-    node = Concat(node, CordRep::Ref(rhs_stack.back()));
-    rhs_stack.pop_back();
-  }
-  return node;
-}
-
-// RemoveSuffixFrom() is very similar to RemovePrefixFrom(), with the
-// exception that removing a suffix has an optimization where a node may be
-// edited in place iff that node and all its ancestors have a refcount of 1.
-static CordRep* RemoveSuffixFrom(CordRep* node, size_t n) {
-  if (n >= node->length) return nullptr;
-  if (n == 0) return CordRep::Ref(node);
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> lhs_stack;
-  bool inplace_ok = node->refcount.IsOne();
-
-  while (node->tag == CONCAT) {
-    assert(n <= node->length);
-    if (n < node->concat()->right->length) {
-      // Push left to stack, descend right.
-      lhs_stack.push_back(node->concat()->left);
-      node = node->concat()->right;
-    } else {
-      // Drop right, descend left.
-      n -= node->concat()->right->length;
-      node = node->concat()->left;
-    }
-    inplace_ok = inplace_ok && node->refcount.IsOne();
-  }
-  assert(n <= node->length);
-
-  if (n == 0) {
-    CordRep::Ref(node);
-  } else if (inplace_ok && node->tag != EXTERNAL) {
-    // Consider making a new buffer if the current node capacity is much
-    // larger than the new length.
-    CordRep::Ref(node);
-    node->length -= n;
-  } else {
-    size_t start = 0;
-    size_t len = node->length - n;
-    if (node->tag == SUBSTRING) {
-      start = node->substring()->start;
-      node = node->substring()->child;
-    }
-    node = NewSubstring(CordRep::Ref(node), start, len);
-  }
-  while (!lhs_stack.empty()) {
-    node = Concat(CordRep::Ref(lhs_stack.back()), node);
-    lhs_stack.pop_back();
-  }
-  return node;
-}
-
-void Cord::RemovePrefix(size_t n) {
-  ABSL_INTERNAL_CHECK(n <= size(),
-                      absl::StrCat("Requested prefix size ", n,
-                                   " exceeds Cord's size ", size()));
-  CordRep* tree = contents_.tree();
-  if (tree == nullptr) {
-    contents_.remove_prefix(n);
-  } else {
-    CordRep* newrep = RemovePrefixFrom(tree, n);
-    CordRep::Unref(tree);
-    contents_.replace_tree(VerifyTree(newrep));
-  }
-}
-
-void Cord::RemoveSuffix(size_t n) {
-  ABSL_INTERNAL_CHECK(n <= size(),
-                      absl::StrCat("Requested suffix size ", n,
-                                   " exceeds Cord's size ", size()));
-  CordRep* tree = contents_.tree();
-  if (tree == nullptr) {
-    contents_.reduce_size(n);
-  } else {
-    CordRep* newrep = RemoveSuffixFrom(tree, n);
-    CordRep::Unref(tree);
-    contents_.replace_tree(VerifyTree(newrep));
-  }
-}
-
-// Work item for NewSubRange().
-struct SubRange {
-  SubRange(CordRep* a_node, size_t a_pos, size_t a_n)
-      : node(a_node), pos(a_pos), n(a_n) {}
-  CordRep* node;  // nullptr means concat last 2 results.
-  size_t pos;
-  size_t n;
-};
-
-static CordRep* NewSubRange(CordRep* node, size_t pos, size_t n) {
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> results;
-  absl::InlinedVector<SubRange, kInlinedVectorSize> todo;
-  todo.push_back(SubRange(node, pos, n));
-  do {
-    const SubRange& sr = todo.back();
-    node = sr.node;
-    pos = sr.pos;
-    n = sr.n;
-    todo.pop_back();
-
-    if (node == nullptr) {
-      assert(results.size() >= 2);
-      CordRep* right = results.back();
-      results.pop_back();
-      CordRep* left = results.back();
-      results.pop_back();
-      results.push_back(Concat(left, right));
-    } else if (pos == 0 && n == node->length) {
-      results.push_back(CordRep::Ref(node));
-    } else if (node->tag != CONCAT) {
-      if (node->tag == SUBSTRING) {
-        pos += node->substring()->start;
-        node = node->substring()->child;
-      }
-      results.push_back(NewSubstring(CordRep::Ref(node), pos, n));
-    } else if (pos + n <= node->concat()->left->length) {
-      todo.push_back(SubRange(node->concat()->left, pos, n));
-    } else if (pos >= node->concat()->left->length) {
-      pos -= node->concat()->left->length;
-      todo.push_back(SubRange(node->concat()->right, pos, n));
-    } else {
-      size_t left_n = node->concat()->left->length - pos;
-      todo.push_back(SubRange(nullptr, 0, 0));  // Concat()
-      todo.push_back(SubRange(node->concat()->right, 0, n - left_n));
-      todo.push_back(SubRange(node->concat()->left, pos, left_n));
-    }
-  } while (!todo.empty());
-  assert(results.size() == 1);
-  return results[0];
-}
-
-Cord Cord::Subcord(size_t pos, size_t new_size) const {
-  Cord sub_cord;
-  size_t length = size();
-  if (pos > length) pos = length;
-  if (new_size > length - pos) new_size = length - pos;
-  CordRep* tree = contents_.tree();
-  if (tree == nullptr) {
-    // sub_cord is newly constructed, no need to re-zero-out the tail of
-    // contents_ memory.
-    sub_cord.contents_.set_data(contents_.data() + pos, new_size, false);
-  } else if (new_size == 0) {
-    // We want to return empty subcord, so nothing to do.
-  } else if (new_size <= InlineRep::kMaxInline) {
-    Cord::ChunkIterator it = chunk_begin();
-    it.AdvanceBytes(pos);
-    char* dest = sub_cord.contents_.data_.as_chars;
-    size_t remaining_size = new_size;
-    while (remaining_size > it->size()) {
-      cord_internal::SmallMemmove(dest, it->data(), it->size());
-      remaining_size -= it->size();
-      dest += it->size();
-      ++it;
-    }
-    cord_internal::SmallMemmove(dest, it->data(), remaining_size);
-    sub_cord.contents_.set_tagged_size(new_size);
-  } else {
-    sub_cord.contents_.set_tree(NewSubRange(tree, pos, new_size));
-  }
-  return sub_cord;
-}
-
-// --------------------------------------------------------------------
-// Balancing
-
-class CordForest {
- public:
-  explicit CordForest(size_t length)
-      : root_length_(length), trees_(kMinLengthSize, nullptr) {}
-
-  void Build(CordRep* cord_root) {
-    std::vector<CordRep*> pending = {cord_root};
-
-    while (!pending.empty()) {
-      CordRep* node = pending.back();
-      pending.pop_back();
-      CheckNode(node);
-      if (ABSL_PREDICT_FALSE(node->tag != CONCAT)) {
-        AddNode(node);
-        continue;
-      }
-
-      CordRepConcat* concat_node = node->concat();
-      if (concat_node->depth() >= kMinLengthSize ||
-          concat_node->length < min_length[concat_node->depth()]) {
-        pending.push_back(concat_node->right);
-        pending.push_back(concat_node->left);
-
-        if (concat_node->refcount.IsOne()) {
-          concat_node->left = concat_freelist_;
-          concat_freelist_ = concat_node;
-        } else {
-          CordRep::Ref(concat_node->right);
-          CordRep::Ref(concat_node->left);
-          CordRep::Unref(concat_node);
-        }
-      } else {
-        AddNode(node);
-      }
-    }
-  }
-
-  CordRep* ConcatNodes() {
-    CordRep* sum = nullptr;
-    for (auto* node : trees_) {
-      if (node == nullptr) continue;
-
-      sum = PrependNode(node, sum);
-      root_length_ -= node->length;
-      if (root_length_ == 0) break;
-    }
-    ABSL_INTERNAL_CHECK(sum != nullptr, "Failed to locate sum node");
-    return VerifyTree(sum);
-  }
-
- private:
-  CordRep* AppendNode(CordRep* node, CordRep* sum) {
-    return (sum == nullptr) ? node : MakeConcat(sum, node);
-  }
-
-  CordRep* PrependNode(CordRep* node, CordRep* sum) {
-    return (sum == nullptr) ? node : MakeConcat(node, sum);
-  }
-
-  void AddNode(CordRep* node) {
-    CordRep* sum = nullptr;
-
-    // Collect together everything with which we will merge with node
-    int i = 0;
-    for (; node->length > min_length[i + 1]; ++i) {
-      auto& tree_at_i = trees_[i];
-
-      if (tree_at_i == nullptr) continue;
-      sum = PrependNode(tree_at_i, sum);
-      tree_at_i = nullptr;
-    }
-
-    sum = AppendNode(node, sum);
-
-    // Insert sum into appropriate place in the forest
-    for (; sum->length >= min_length[i]; ++i) {
-      auto& tree_at_i = trees_[i];
-      if (tree_at_i == nullptr) continue;
-
-      sum = MakeConcat(tree_at_i, sum);
-      tree_at_i = nullptr;
-    }
-
-    // min_length[0] == 1, which means sum->length >= min_length[0]
-    assert(i > 0);
-    trees_[i - 1] = sum;
-  }
-
-  // Make concat node trying to resue existing CordRepConcat nodes we
-  // already collected in the concat_freelist_.
-  CordRep* MakeConcat(CordRep* left, CordRep* right) {
-    if (concat_freelist_ == nullptr) return RawConcat(left, right);
-
-    CordRepConcat* rep = concat_freelist_;
-    if (concat_freelist_->left == nullptr) {
-      concat_freelist_ = nullptr;
-    } else {
-      concat_freelist_ = concat_freelist_->left->concat();
-    }
-    SetConcatChildren(rep, left, right);
-
-    return rep;
-  }
-
-  static void CheckNode(CordRep* node) {
-    ABSL_INTERNAL_CHECK(node->length != 0u, "");
-    if (node->tag == CONCAT) {
-      ABSL_INTERNAL_CHECK(node->concat()->left != nullptr, "");
-      ABSL_INTERNAL_CHECK(node->concat()->right != nullptr, "");
-      ABSL_INTERNAL_CHECK(node->length == (node->concat()->left->length +
-                                           node->concat()->right->length),
-                          "");
-    }
-  }
-
-  size_t root_length_;
-
-  // use an inlined vector instead of a flat array to get bounds checking
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> trees_;
-
-  // List of concat nodes we can re-use for Cord balancing.
-  CordRepConcat* concat_freelist_ = nullptr;
-};
-
-static CordRep* Rebalance(CordRep* node) {
-  VerifyTree(node);
-  assert(node->tag == CONCAT);
-
-  if (node->length == 0) {
-    return nullptr;
-  }
-
-  CordForest forest(node->length);
-  forest.Build(node);
-  return forest.ConcatNodes();
-}
-
-// --------------------------------------------------------------------
-// Comparators
-
-namespace {
-
-int ClampResult(int memcmp_res) {
-  return static_cast<int>(memcmp_res > 0) - static_cast<int>(memcmp_res < 0);
-}
-
-int CompareChunks(absl::string_view* lhs, absl::string_view* rhs,
-                  size_t* size_to_compare) {
-  size_t compared_size = std::min(lhs->size(), rhs->size());
-  assert(*size_to_compare >= compared_size);
-  *size_to_compare -= compared_size;
-
-  int memcmp_res = ::memcmp(lhs->data(), rhs->data(), compared_size);
-  if (memcmp_res != 0) return memcmp_res;
-
-  lhs->remove_prefix(compared_size);
-  rhs->remove_prefix(compared_size);
-
-  return 0;
-}
-
-// This overload set computes comparison results from memcmp result. This
-// interface is used inside GenericCompare below. Differet implementations
-// are specialized for int and bool. For int we clamp result to {-1, 0, 1}
-// set. For bool we just interested in "value == 0".
-template <typename ResultType>
-ResultType ComputeCompareResult(int memcmp_res) {
-  return ClampResult(memcmp_res);
-}
-template <>
-bool ComputeCompareResult<bool>(int memcmp_res) {
-  return memcmp_res == 0;
-}
-
-}  // namespace
-
-// Helper routine. Locates the first flat chunk of the Cord without
-// initializing the iterator.
-inline absl::string_view Cord::InlineRep::FindFlatStartPiece() const {
-  size_t n = tagged_size();
-  if (n <= kMaxInline) {
-    return absl::string_view(data_.as_chars, n);
-  }
-
-  CordRep* node = tree();
-  if (node->tag >= FLAT) {
-    return absl::string_view(node->data, node->length);
-  }
-
-  if (node->tag == EXTERNAL) {
-    return absl::string_view(node->external()->base, node->length);
-  }
-
-  // Walk down the left branches until we hit a non-CONCAT node.
-  while (node->tag == CONCAT) {
-    node = node->concat()->left;
-  }
-
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  assert(length != 0);
-
-  if (node->tag == SUBSTRING) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  if (node->tag >= FLAT) {
-    return absl::string_view(node->data + offset, length);
-  }
-
-  assert((node->tag == EXTERNAL) && "Expect FLAT or EXTERNAL node here");
-
-  return absl::string_view(node->external()->base + offset, length);
-}
-
-inline int Cord::CompareSlowPath(absl::string_view rhs, size_t compared_size,
-                                 size_t size_to_compare) const {
-  auto advance = [](Cord::ChunkIterator* it, absl::string_view* chunk) {
-    if (!chunk->empty()) return true;
-    ++*it;
-    if (it->bytes_remaining_ == 0) return false;
-    *chunk = **it;
-    return true;
-  };
-
-  Cord::ChunkIterator lhs_it = chunk_begin();
-
-  // compared_size is inside first chunk.
-  absl::string_view lhs_chunk =
-      (lhs_it.bytes_remaining_ != 0) ? *lhs_it : absl::string_view();
-  assert(compared_size <= lhs_chunk.size());
-  assert(compared_size <= rhs.size());
-  lhs_chunk.remove_prefix(compared_size);
-  rhs.remove_prefix(compared_size);
-  size_to_compare -= compared_size;  // skip already compared size.
-
-  while (advance(&lhs_it, &lhs_chunk) && !rhs.empty()) {
-    int comparison_result = CompareChunks(&lhs_chunk, &rhs, &size_to_compare);
-    if (comparison_result != 0) return comparison_result;
-    if (size_to_compare == 0) return 0;
-  }
-
-  return static_cast<int>(rhs.empty()) - static_cast<int>(lhs_chunk.empty());
-}
-
-inline int Cord::CompareSlowPath(const Cord& rhs, size_t compared_size,
-                                 size_t size_to_compare) const {
-  auto advance = [](Cord::ChunkIterator* it, absl::string_view* chunk) {
-    if (!chunk->empty()) return true;
-    ++*it;
-    if (it->bytes_remaining_ == 0) return false;
-    *chunk = **it;
-    return true;
-  };
-
-  Cord::ChunkIterator lhs_it = chunk_begin();
-  Cord::ChunkIterator rhs_it = rhs.chunk_begin();
-
-  // compared_size is inside both first chunks.
-  absl::string_view lhs_chunk =
-      (lhs_it.bytes_remaining_ != 0) ? *lhs_it : absl::string_view();
-  absl::string_view rhs_chunk =
-      (rhs_it.bytes_remaining_ != 0) ? *rhs_it : absl::string_view();
-  assert(compared_size <= lhs_chunk.size());
-  assert(compared_size <= rhs_chunk.size());
-  lhs_chunk.remove_prefix(compared_size);
-  rhs_chunk.remove_prefix(compared_size);
-  size_to_compare -= compared_size;  // skip already compared size.
-
-  while (advance(&lhs_it, &lhs_chunk) && advance(&rhs_it, &rhs_chunk)) {
-    int memcmp_res = CompareChunks(&lhs_chunk, &rhs_chunk, &size_to_compare);
-    if (memcmp_res != 0) return memcmp_res;
-    if (size_to_compare == 0) return 0;
-  }
-
-  return static_cast<int>(rhs_chunk.empty()) -
-         static_cast<int>(lhs_chunk.empty());
-}
-
-inline absl::string_view Cord::GetFirstChunk(const Cord& c) {
-  return c.contents_.FindFlatStartPiece();
-}
-inline absl::string_view Cord::GetFirstChunk(absl::string_view sv) {
-  return sv;
-}
-
-// Compares up to 'size_to_compare' bytes of 'lhs' with 'rhs'. It is assumed
-// that 'size_to_compare' is greater that size of smallest of first chunks.
-template <typename ResultType, typename RHS>
-ResultType GenericCompare(const Cord& lhs, const RHS& rhs,
-                          size_t size_to_compare) {
-  absl::string_view lhs_chunk = Cord::GetFirstChunk(lhs);
-  absl::string_view rhs_chunk = Cord::GetFirstChunk(rhs);
-
-  size_t compared_size = std::min(lhs_chunk.size(), rhs_chunk.size());
-  assert(size_to_compare >= compared_size);
-  int memcmp_res = ::memcmp(lhs_chunk.data(), rhs_chunk.data(), compared_size);
-  if (compared_size == size_to_compare || memcmp_res != 0) {
-    return ComputeCompareResult<ResultType>(memcmp_res);
-  }
-
-  return ComputeCompareResult<ResultType>(
-      lhs.CompareSlowPath(rhs, compared_size, size_to_compare));
-}
-
-bool Cord::EqualsImpl(absl::string_view rhs, size_t size_to_compare) const {
-  return GenericCompare<bool>(*this, rhs, size_to_compare);
-}
-
-bool Cord::EqualsImpl(const Cord& rhs, size_t size_to_compare) const {
-  return GenericCompare<bool>(*this, rhs, size_to_compare);
-}
-
-template <typename RHS>
-inline int SharedCompareImpl(const Cord& lhs, const RHS& rhs) {
-  size_t lhs_size = lhs.size();
-  size_t rhs_size = rhs.size();
-  if (lhs_size == rhs_size) {
-    return GenericCompare<int>(lhs, rhs, lhs_size);
-  }
-  if (lhs_size < rhs_size) {
-    auto data_comp_res = GenericCompare<int>(lhs, rhs, lhs_size);
-    return data_comp_res == 0 ? -1 : data_comp_res;
-  }
-
-  auto data_comp_res = GenericCompare<int>(lhs, rhs, rhs_size);
-  return data_comp_res == 0 ? +1 : data_comp_res;
-}
-
-int Cord::Compare(absl::string_view rhs) const {
-  return SharedCompareImpl(*this, rhs);
-}
-
-int Cord::CompareImpl(const Cord& rhs) const {
-  return SharedCompareImpl(*this, rhs);
-}
-
-bool Cord::EndsWith(absl::string_view rhs) const {
-  size_t my_size = size();
-  size_t rhs_size = rhs.size();
-
-  if (my_size < rhs_size) return false;
-
-  Cord tmp(*this);
-  tmp.RemovePrefix(my_size - rhs_size);
-  return tmp.EqualsImpl(rhs, rhs_size);
-}
-
-bool Cord::EndsWith(const Cord& rhs) const {
-  size_t my_size = size();
-  size_t rhs_size = rhs.size();
-
-  if (my_size < rhs_size) return false;
-
-  Cord tmp(*this);
-  tmp.RemovePrefix(my_size - rhs_size);
-  return tmp.EqualsImpl(rhs, rhs_size);
-}
-
-// --------------------------------------------------------------------
-// Misc.
-
-Cord::operator std::string() const {
-  std::string s;
-  absl::CopyCordToString(*this, &s);
-  return s;
-}
-
-void CopyCordToString(const Cord& src, std::string* dst) {
-  if (!src.contents_.is_tree()) {
-    src.contents_.CopyTo(dst);
-  } else {
-    absl::strings_internal::STLStringResizeUninitialized(dst, src.size());
-    src.CopyToArraySlowPath(&(*dst)[0]);
-  }
-}
-
-void Cord::CopyToArraySlowPath(char* dst) const {
-  assert(contents_.is_tree());
-  absl::string_view fragment;
-  if (GetFlatAux(contents_.tree(), &fragment)) {
-    memcpy(dst, fragment.data(), fragment.size());
-    return;
-  }
-  for (absl::string_view chunk : Chunks()) {
-    memcpy(dst, chunk.data(), chunk.size());
-    dst += chunk.size();
-  }
-}
-
-Cord::ChunkIterator& Cord::ChunkIterator::AdvanceStack() {
-  auto& stack_of_right_children = stack_of_right_children_;
-  if (stack_of_right_children.empty()) {
-    assert(!current_chunk_.empty());  // Called on invalid iterator.
-    // We have reached the end of the Cord.
-    return *this;
-  }
-
-  // Process the next node on the stack.
-  CordRep* node = stack_of_right_children.back();
-  stack_of_right_children.pop_back();
-
-  // Walk down the left branches until we hit a non-CONCAT node. Save the
-  // right children to the stack for subsequent traversal.
-  while (node->tag == CONCAT) {
-    stack_of_right_children.push_back(node->concat()->right);
-    node = node->concat()->left;
-  }
-
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  if (node->tag == SUBSTRING) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  assert(node->tag == EXTERNAL || node->tag >= FLAT);
-  assert(length != 0);
-  const char* data =
-      node->tag == EXTERNAL ? node->external()->base : node->data;
-  current_chunk_ = absl::string_view(data + offset, length);
-  current_leaf_ = node;
-  return *this;
-}
-
-Cord Cord::ChunkIterator::AdvanceAndReadBytes(size_t n) {
-  ABSL_HARDENING_ASSERT(bytes_remaining_ >= n &&
-                        "Attempted to iterate past `end()`");
-  Cord subcord;
-
-  if (n <= InlineRep::kMaxInline) {
-    // Range to read fits in inline data. Flatten it.
-    char* data = subcord.contents_.set_data(n);
-    while (n > current_chunk_.size()) {
-      memcpy(data, current_chunk_.data(), current_chunk_.size());
-      data += current_chunk_.size();
-      n -= current_chunk_.size();
-      ++*this;
-    }
-    memcpy(data, current_chunk_.data(), n);
-    if (n < current_chunk_.size()) {
-      RemoveChunkPrefix(n);
-    } else if (n > 0) {
-      ++*this;
-    }
-    return subcord;
-  }
-  auto& stack_of_right_children = stack_of_right_children_;
-  if (n < current_chunk_.size()) {
-    // Range to read is a proper subrange of the current chunk.
-    assert(current_leaf_ != nullptr);
-    CordRep* subnode = CordRep::Ref(current_leaf_);
-    const char* data =
-        subnode->tag == EXTERNAL ? subnode->external()->base : subnode->data;
-    subnode = NewSubstring(subnode, current_chunk_.data() - data, n);
-    subcord.contents_.set_tree(VerifyTree(subnode));
-    RemoveChunkPrefix(n);
-    return subcord;
-  }
-
-  // Range to read begins with a proper subrange of the current chunk.
-  assert(!current_chunk_.empty());
-  assert(current_leaf_ != nullptr);
-  CordRep* subnode = CordRep::Ref(current_leaf_);
-  if (current_chunk_.size() < subnode->length) {
-    const char* data =
-        subnode->tag == EXTERNAL ? subnode->external()->base : subnode->data;
-    subnode = NewSubstring(subnode, current_chunk_.data() - data,
-                           current_chunk_.size());
-  }
-  n -= current_chunk_.size();
-  bytes_remaining_ -= current_chunk_.size();
-
-  // Process the next node(s) on the stack, reading whole subtrees depending on
-  // their length and how many bytes we are advancing.
-  CordRep* node = nullptr;
-  while (!stack_of_right_children.empty()) {
-    node = stack_of_right_children.back();
-    stack_of_right_children.pop_back();
-    if (node->length > n) break;
-    // TODO(qrczak): This might unnecessarily recreate existing concat nodes.
-    // Avoiding that would need pretty complicated logic (instead of
-    // current_leaf, keep current_subtree_ which points to the highest node
-    // such that the current leaf can be found on the path of left children
-    // starting from current_subtree_; delay creating subnode while node is
-    // below current_subtree_; find the proper node along the path of left
-    // children starting from current_subtree_ if this loop exits while staying
-    // below current_subtree_; etc.; alternatively, push parents instead of
-    // right children on the stack).
-    subnode = Concat(subnode, CordRep::Ref(node));
-    n -= node->length;
-    bytes_remaining_ -= node->length;
-    node = nullptr;
-  }
-
-  if (node == nullptr) {
-    // We have reached the end of the Cord.
-    assert(bytes_remaining_ == 0);
-    subcord.contents_.set_tree(VerifyTree(subnode));
-    return subcord;
-  }
-
-  // Walk down the appropriate branches until we hit a non-CONCAT node. Save the
-  // right children to the stack for subsequent traversal.
-  while (node->tag == CONCAT) {
-    if (node->concat()->left->length > n) {
-      // Push right, descend left.
-      stack_of_right_children.push_back(node->concat()->right);
-      node = node->concat()->left;
-    } else {
-      // Read left, descend right.
-      subnode = Concat(subnode, CordRep::Ref(node->concat()->left));
-      n -= node->concat()->left->length;
-      bytes_remaining_ -= node->concat()->left->length;
-      node = node->concat()->right;
-    }
-  }
-
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  if (node->tag == SUBSTRING) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  // Range to read ends with a proper (possibly empty) subrange of the current
-  // chunk.
-  assert(node->tag == EXTERNAL || node->tag >= FLAT);
-  assert(length > n);
-  if (n > 0) {
-    subnode = Concat(subnode, NewSubstring(CordRep::Ref(node), offset, n));
-  }
-  const char* data =
-      node->tag == EXTERNAL ? node->external()->base : node->data;
-  current_chunk_ = absl::string_view(data + offset + n, length - n);
-  current_leaf_ = node;
-  bytes_remaining_ -= n;
-  subcord.contents_.set_tree(VerifyTree(subnode));
-  return subcord;
-}
-
-void Cord::ChunkIterator::AdvanceBytesSlowPath(size_t n) {
-  assert(bytes_remaining_ >= n && "Attempted to iterate past `end()`");
-  assert(n >= current_chunk_.size());  // This should only be called when
-                                       // iterating to a new node.
-
-  n -= current_chunk_.size();
-  bytes_remaining_ -= current_chunk_.size();
-
-  if (stack_of_right_children_.empty()) {
-    // We have reached the end of the Cord.
-    assert(bytes_remaining_ == 0);
-    return;
-  }
-
-  // Process the next node(s) on the stack, skipping whole subtrees depending on
-  // their length and how many bytes we are advancing.
-  CordRep* node = nullptr;
-  auto& stack_of_right_children = stack_of_right_children_;
-  while (!stack_of_right_children.empty()) {
-    node = stack_of_right_children.back();
-    stack_of_right_children.pop_back();
-    if (node->length > n) break;
-    n -= node->length;
-    bytes_remaining_ -= node->length;
-    node = nullptr;
-  }
-
-  if (node == nullptr) {
-    // We have reached the end of the Cord.
-    assert(bytes_remaining_ == 0);
-    return;
-  }
-
-  // Walk down the appropriate branches until we hit a non-CONCAT node. Save the
-  // right children to the stack for subsequent traversal.
-  while (node->tag == CONCAT) {
-    if (node->concat()->left->length > n) {
-      // Push right, descend left.
-      stack_of_right_children.push_back(node->concat()->right);
-      node = node->concat()->left;
-    } else {
-      // Skip left, descend right.
-      n -= node->concat()->left->length;
-      bytes_remaining_ -= node->concat()->left->length;
-      node = node->concat()->right;
-    }
-  }
-
-  // Get the child node if we encounter a SUBSTRING.
-  size_t offset = 0;
-  size_t length = node->length;
-  if (node->tag == SUBSTRING) {
-    offset = node->substring()->start;
-    node = node->substring()->child;
-  }
-
-  assert(node->tag == EXTERNAL || node->tag >= FLAT);
-  assert(length > n);
-  const char* data =
-      node->tag == EXTERNAL ? node->external()->base : node->data;
-  current_chunk_ = absl::string_view(data + offset + n, length - n);
-  current_leaf_ = node;
-  bytes_remaining_ -= n;
-}
-
-char Cord::operator[](size_t i) const {
-  ABSL_HARDENING_ASSERT(i < size());
-  size_t offset = i;
-  const CordRep* rep = contents_.tree();
-  if (rep == nullptr) {
-    return contents_.data()[i];
-  }
-  while (true) {
-    assert(rep != nullptr);
-    assert(offset < rep->length);
-    if (rep->tag >= FLAT) {
-      // Get the "i"th character directly from the flat array.
-      return rep->data[offset];
-    } else if (rep->tag == EXTERNAL) {
-      // Get the "i"th character from the external array.
-      return rep->external()->base[offset];
-    } else if (rep->tag == CONCAT) {
-      // Recursively branch to the side of the concatenation that the "i"th
-      // character is on.
-      size_t left_length = rep->concat()->left->length;
-      if (offset < left_length) {
-        rep = rep->concat()->left;
-      } else {
-        offset -= left_length;
-        rep = rep->concat()->right;
-      }
-    } else {
-      // This must be a substring a node, so bypass it to get to the child.
-      assert(rep->tag == SUBSTRING);
-      offset += rep->substring()->start;
-      rep = rep->substring()->child;
-    }
-  }
-}
-
-absl::string_view Cord::FlattenSlowPath() {
-  size_t total_size = size();
-  CordRep* new_rep;
-  char* new_buffer;
-
-  // Try to put the contents into a new flat rep. If they won't fit in the
-  // biggest possible flat node, use an external rep instead.
-  if (total_size <= kMaxFlatLength) {
-    new_rep = CordRepFlat::New(total_size);
-    new_rep->length = total_size;
-    new_buffer = new_rep->data;
-    CopyToArraySlowPath(new_buffer);
-  } else {
-    new_buffer = std::allocator<char>().allocate(total_size);
-    CopyToArraySlowPath(new_buffer);
-    new_rep = absl::cord_internal::NewExternalRep(
-        absl::string_view(new_buffer, total_size), [](absl::string_view s) {
-          std::allocator<char>().deallocate(const_cast<char*>(s.data()),
-                                            s.size());
-        });
-  }
-  if (CordRep* tree = contents_.tree()) {
-    CordRep::Unref(tree);
-  }
-  contents_.set_tree(new_rep);
-  return absl::string_view(new_buffer, total_size);
-}
-
-/* static */ bool Cord::GetFlatAux(CordRep* rep, absl::string_view* fragment) {
-  assert(rep != nullptr);
-  if (rep->tag >= FLAT) {
-    *fragment = absl::string_view(rep->data, rep->length);
-    return true;
-  } else if (rep->tag == EXTERNAL) {
-    *fragment = absl::string_view(rep->external()->base, rep->length);
-    return true;
-  } else if (rep->tag == SUBSTRING) {
-    CordRep* child = rep->substring()->child;
-    if (child->tag >= FLAT) {
-      *fragment =
-          absl::string_view(child->data + rep->substring()->start, rep->length);
-      return true;
-    } else if (child->tag == EXTERNAL) {
-      *fragment = absl::string_view(
-          child->external()->base + rep->substring()->start, rep->length);
-      return true;
-    }
-  }
-  return false;
-}
-
-/* static */ void Cord::ForEachChunkAux(
-    absl::cord_internal::CordRep* rep,
-    absl::FunctionRef<void(absl::string_view)> callback) {
-  assert(rep != nullptr);
-  int stack_pos = 0;
-  constexpr int stack_max = 128;
-  // Stack of right branches for tree traversal
-  absl::cord_internal::CordRep* stack[stack_max];
-  absl::cord_internal::CordRep* current_node = rep;
-  while (true) {
-    if (current_node->tag == CONCAT) {
-      if (stack_pos == stack_max) {
-        // There's no more room on our stack array to add another right branch,
-        // and the idea is to avoid allocations, so call this function
-        // recursively to navigate this subtree further.  (This is not something
-        // we expect to happen in practice).
-        ForEachChunkAux(current_node, callback);
-
-        // Pop the next right branch and iterate.
-        current_node = stack[--stack_pos];
-        continue;
-      } else {
-        // Save the right branch for later traversal and continue down the left
-        // branch.
-        stack[stack_pos++] = current_node->concat()->right;
-        current_node = current_node->concat()->left;
-        continue;
-      }
-    }
-    // This is a leaf node, so invoke our callback.
-    absl::string_view chunk;
-    bool success = GetFlatAux(current_node, &chunk);
-    assert(success);
-    if (success) {
-      callback(chunk);
-    }
-    if (stack_pos == 0) {
-      // end of traversal
-      return;
-    }
-    current_node = stack[--stack_pos];
-  }
-}
-
-static void DumpNode(CordRep* rep, bool include_data, std::ostream* os) {
-  const int kIndentStep = 1;
-  int indent = 0;
-  absl::InlinedVector<CordRep*, kInlinedVectorSize> stack;
-  absl::InlinedVector<int, kInlinedVectorSize> indents;
-  for (;;) {
-    *os << std::setw(3) << rep->refcount.Get();
-    *os << " " << std::setw(7) << rep->length;
-    *os << " [";
-    if (include_data) *os << static_cast<void*>(rep);
-    *os << "]";
-    *os << " " << (IsRootBalanced(rep) ? 'b' : 'u');
-    *os << " " << std::setw(indent) << "";
-    if (rep->tag == CONCAT) {
-      *os << "CONCAT depth=" << Depth(rep) << "\n";
-      indent += kIndentStep;
-      indents.push_back(indent);
-      stack.push_back(rep->concat()->right);
-      rep = rep->concat()->left;
-    } else if (rep->tag == SUBSTRING) {
-      *os << "SUBSTRING @ " << rep->substring()->start << "\n";
-      indent += kIndentStep;
-      rep = rep->substring()->child;
-    } else {  // Leaf
-      if (rep->tag == EXTERNAL) {
-        *os << "EXTERNAL [";
-        if (include_data)
-          *os << absl::CEscape(std::string(rep->external()->base, rep->length));
-        *os << "]\n";
-      } else {
-        *os << "FLAT cap=" << rep->flat()->Capacity()
-            << " [";
-        if (include_data)
-          *os << absl::CEscape(std::string(rep->data, rep->length));
-        *os << "]\n";
-      }
-      if (stack.empty()) break;
-      rep = stack.back();
-      stack.pop_back();
-      indent = indents.back();
-      indents.pop_back();
-    }
-  }
-  ABSL_INTERNAL_CHECK(indents.empty(), "");
-}
-
-static std::string ReportError(CordRep* root, CordRep* node) {
-  std::ostringstream buf;
-  buf << "Error at node " << node << " in:";
-  DumpNode(root, true, &buf);
-  return buf.str();
-}
-
-static bool VerifyNode(CordRep* root, CordRep* start_node,
-                       bool full_validation) {
-  absl::InlinedVector<CordRep*, 2> worklist;
-  worklist.push_back(start_node);
-  do {
-    CordRep* node = worklist.back();
-    worklist.pop_back();
-
-    ABSL_INTERNAL_CHECK(node != nullptr, ReportError(root, node));
-    if (node != root) {
-      ABSL_INTERNAL_CHECK(node->length != 0, ReportError(root, node));
-    }
-
-    if (node->tag == CONCAT) {
-      ABSL_INTERNAL_CHECK(node->concat()->left != nullptr,
-                          ReportError(root, node));
-      ABSL_INTERNAL_CHECK(node->concat()->right != nullptr,
-                          ReportError(root, node));
-      ABSL_INTERNAL_CHECK((node->length == node->concat()->left->length +
-                                               node->concat()->right->length),
-                          ReportError(root, node));
-      if (full_validation) {
-        worklist.push_back(node->concat()->right);
-        worklist.push_back(node->concat()->left);
-      }
-    } else if (node->tag >= FLAT) {
-      ABSL_INTERNAL_CHECK(
-          node->length <= node->flat()->Capacity(),
-          ReportError(root, node));
-    } else if (node->tag == EXTERNAL) {
-      ABSL_INTERNAL_CHECK(node->external()->base != nullptr,
-                          ReportError(root, node));
-    } else if (node->tag == SUBSTRING) {
-      ABSL_INTERNAL_CHECK(
-          node->substring()->start < node->substring()->child->length,
-          ReportError(root, node));
-      ABSL_INTERNAL_CHECK(node->substring()->start + node->length <=
-                              node->substring()->child->length,
-                          ReportError(root, node));
-    }
-  } while (!worklist.empty());
-  return true;
-}
-
-// Traverses the tree and computes the total memory allocated.
-/* static */ size_t Cord::MemoryUsageAux(const CordRep* rep) {
-  size_t total_mem_usage = 0;
-
-  // Allow a quick exit for the common case that the root is a leaf.
-  if (RepMemoryUsageLeaf(rep, &total_mem_usage)) {
-    return total_mem_usage;
-  }
-
-  // Iterate over the tree. cur_node is never a leaf node and leaf nodes will
-  // never be appended to tree_stack. This reduces overhead from manipulating
-  // tree_stack.
-  absl::InlinedVector<const CordRep*, kInlinedVectorSize> tree_stack;
-  const CordRep* cur_node = rep;
-  while (true) {
-    const CordRep* next_node = nullptr;
-
-    if (cur_node->tag == CONCAT) {
-      total_mem_usage += sizeof(CordRepConcat);
-      const CordRep* left = cur_node->concat()->left;
-      if (!RepMemoryUsageLeaf(left, &total_mem_usage)) {
-        next_node = left;
-      }
-
-      const CordRep* right = cur_node->concat()->right;
-      if (!RepMemoryUsageLeaf(right, &total_mem_usage)) {
-        if (next_node) {
-          tree_stack.push_back(next_node);
-        }
-        next_node = right;
-      }
-    } else {
-      // Since cur_node is not a leaf or a concat node it must be a substring.
-      assert(cur_node->tag == SUBSTRING);
-      total_mem_usage += sizeof(CordRepSubstring);
-      next_node = cur_node->substring()->child;
-      if (RepMemoryUsageLeaf(next_node, &total_mem_usage)) {
-        next_node = nullptr;
-      }
-    }
-
-    if (!next_node) {
-      if (tree_stack.empty()) {
-        return total_mem_usage;
-      }
-      next_node = tree_stack.back();
-      tree_stack.pop_back();
-    }
-    cur_node = next_node;
-  }
-}
-
-std::ostream& operator<<(std::ostream& out, const Cord& cord) {
-  for (absl::string_view chunk : cord.Chunks()) {
-    out.write(chunk.data(), chunk.size());
-  }
-  return out;
-}
-
-namespace strings_internal {
-size_t CordTestAccess::FlatOverhead() { return cord_internal::kFlatOverhead; }
-size_t CordTestAccess::MaxFlatLength() { return cord_internal::kMaxFlatLength; }
-size_t CordTestAccess::FlatTagToLength(uint8_t tag) {
-  return cord_internal::TagToLength(tag);
-}
-uint8_t CordTestAccess::LengthToTag(size_t s) {
-  ABSL_INTERNAL_CHECK(s <= kMaxFlatLength, absl::StrCat("Invalid length ", s));
-  return cord_internal::AllocatedSizeToTag(s + cord_internal::kFlatOverhead);
-}
-size_t CordTestAccess::SizeofCordRepConcat() { return sizeof(CordRepConcat); }
-size_t CordTestAccess::SizeofCordRepExternal() {
-  return sizeof(CordRepExternal);
-}
-size_t CordTestAccess::SizeofCordRepSubstring() {
-  return sizeof(CordRepSubstring);
-}
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/cord.h b/third_party/abseil/absl/strings/cord.h
deleted file mode 100644
index 7136f03..0000000
--- a/third_party/abseil/absl/strings/cord.h
+++ /dev/null
@@ -1,1322 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: cord.h
-// -----------------------------------------------------------------------------
-//
-// This file defines the `absl::Cord` data structure and operations on that data
-// structure. A Cord is a string-like sequence of characters optimized for
-// specific use cases. Unlike a `std::string`, which stores an array of
-// contiguous characters, Cord data is stored in a structure consisting of
-// separate, reference-counted "chunks." (Currently, this implementation is a
-// tree structure, though that implementation may change.)
-//
-// Because a Cord consists of these chunks, data can be added to or removed from
-// a Cord during its lifetime. Chunks may also be shared between Cords. Unlike a
-// `std::string`, a Cord can therefore accomodate data that changes over its
-// lifetime, though it's not quite "mutable"; it can change only in the
-// attachment, detachment, or rearrangement of chunks of its constituent data.
-//
-// A Cord provides some benefit over `std::string` under the following (albeit
-// narrow) circumstances:
-//
-//   * Cord data is designed to grow and shrink over a Cord's lifetime. Cord
-//     provides efficient insertions and deletions at the start and end of the
-//     character sequences, avoiding copies in those cases. Static data should
-//     generally be stored as strings.
-//   * External memory consisting of string-like data can be directly added to
-//     a Cord without requiring copies or allocations.
-//   * Cord data may be shared and copied cheaply. Cord provides a copy-on-write
-//     implementation and cheap sub-Cord operations. Copying a Cord is an O(1)
-//     operation.
-//
-// As a consequence to the above, Cord data is generally large. Small data
-// should generally use strings, as construction of a Cord requires some
-// overhead. Small Cords (<= 15 bytes) are represented inline, but most small
-// Cords are expected to grow over their lifetimes.
-//
-// Note that because a Cord is made up of separate chunked data, random access
-// to character data within a Cord is slower than within a `std::string`.
-//
-// Thread Safety
-//
-// Cord has the same thread-safety properties as many other types like
-// std::string, std::vector<>, int, etc -- it is thread-compatible. In
-// particular, if threads do not call non-const methods, then it is safe to call
-// const methods without synchronization. Copying a Cord produces a new instance
-// that can be used concurrently with the original in arbitrary ways.
-
-#ifndef ABSL_STRINGS_CORD_H_
-#define ABSL_STRINGS_CORD_H_
-
-#include <algorithm>
-#include <cstddef>
-#include <cstdint>
-#include <cstring>
-#include <iosfwd>
-#include <iterator>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/per_thread_tls.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/container/inlined_vector.h"
-#include "absl/functional/function_ref.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/internal/cord_internal.h"
-#include "absl/strings/internal/resize_uninitialized.h"
-#include "absl/strings/internal/string_constant.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-class Cord;
-class CordTestPeer;
-template <typename Releaser>
-Cord MakeCordFromExternal(absl::string_view, Releaser&&);
-void CopyCordToString(const Cord& src, std::string* dst);
-
-// Cord
-//
-// A Cord is a sequence of characters, designed to be more efficient than a
-// `std::string` in certain circumstances: namely, large string data that needs
-// to change over its lifetime or shared, especially when such data is shared
-// across API boundaries.
-//
-// A Cord stores its character data in a structure that allows efficient prepend
-// and append operations. This makes a Cord useful for large string data sent
-// over in a wire format that may need to be prepended or appended at some point
-// during the data exchange (e.g. HTTP, protocol buffers). For example, a
-// Cord is useful for storing an HTTP request, and prepending an HTTP header to
-// such a request.
-//
-// Cords should not be used for storing general string data, however. They
-// require overhead to construct and are slower than strings for random access.
-//
-// The Cord API provides the following common API operations:
-//
-// * Create or assign Cords out of existing string data, memory, or other Cords
-// * Append and prepend data to an existing Cord
-// * Create new Sub-Cords from existing Cord data
-// * Swap Cord data and compare Cord equality
-// * Write out Cord data by constructing a `std::string`
-//
-// Additionally, the API provides iterator utilities to iterate through Cord
-// data via chunks or character bytes.
-//
-class Cord {
- private:
-  template <typename T>
-  using EnableIfString =
-      absl::enable_if_t<std::is_same<T, std::string>::value, int>;
-
- public:
-  // Cord::Cord() Constructors.
-
-  // Creates an empty Cord.
-  constexpr Cord() noexcept;
-
-  // Creates a Cord from an existing Cord. Cord is copyable and efficiently
-  // movable. The moved-from state is valid but unspecified.
-  Cord(const Cord& src);
-  Cord(Cord&& src) noexcept;
-  Cord& operator=(const Cord& x);
-  Cord& operator=(Cord&& x) noexcept;
-
-  // Creates a Cord from a `src` string. This constructor is marked explicit to
-  // prevent implicit Cord constructions from arguments convertible to an
-  // `absl::string_view`.
-  explicit Cord(absl::string_view src);
-  Cord& operator=(absl::string_view src);
-
-  // Creates a Cord from a `std::string&&` rvalue. These constructors are
-  // templated to avoid ambiguities for types that are convertible to both
-  // `absl::string_view` and `std::string`, such as `const char*`.
-  template <typename T, EnableIfString<T> = 0>
-  explicit Cord(T&& src);
-  template <typename T, EnableIfString<T> = 0>
-  Cord& operator=(T&& src);
-
-  // Cord::~Cord()
-  //
-  // Destructs the Cord.
-  ~Cord() {
-    if (contents_.is_tree()) DestroyCordSlow();
-  }
-
-  // MakeCordFromExternal()
-  //
-  // Creates a Cord that takes ownership of external string memory. The
-  // contents of `data` are not copied to the Cord; instead, the external
-  // memory is added to the Cord and reference-counted. This data may not be
-  // changed for the life of the Cord, though it may be prepended or appended
-  // to.
-  //
-  // `MakeCordFromExternal()` takes a callable "releaser" that is invoked when
-  // the reference count for `data` reaches zero. As noted above, this data must
-  // remain live until the releaser is invoked. The callable releaser also must:
-  //
-  //   * be move constructible
-  //   * support `void operator()(absl::string_view) const` or `void operator()`
-  //
-  // Example:
-  //
-  // Cord MakeCord(BlockPool* pool) {
-  //   Block* block = pool->NewBlock();
-  //   FillBlock(block);
-  //   return absl::MakeCordFromExternal(
-  //       block->ToStringView(),
-  //       [pool, block](absl::string_view v) {
-  //         pool->FreeBlock(block, v);
-  //       });
-  // }
-  //
-  // WARNING: Because a Cord can be reference-counted, it's likely a bug if your
-  // releaser doesn't do anything. For example, consider the following:
-  //
-  // void Foo(const char* buffer, int len) {
-  //   auto c = absl::MakeCordFromExternal(absl::string_view(buffer, len),
-  //                                       [](absl::string_view) {});
-  //
-  //   // BUG: If Bar() copies its cord for any reason, including keeping a
-  //   // substring of it, the lifetime of buffer might be extended beyond
-  //   // when Foo() returns.
-  //   Bar(c);
-  // }
-  template <typename Releaser>
-  friend Cord MakeCordFromExternal(absl::string_view data, Releaser&& releaser);
-
-  // Cord::Clear()
-  //
-  // Releases the Cord data. Any nodes that share data with other Cords, if
-  // applicable, will have their reference counts reduced by 1.
-  void Clear();
-
-  // Cord::Append()
-  //
-  // Appends data to the Cord, which may come from another Cord or other string
-  // data.
-  void Append(const Cord& src);
-  void Append(Cord&& src);
-  void Append(absl::string_view src);
-  template <typename T, EnableIfString<T> = 0>
-  void Append(T&& src);
-
-  // Cord::Prepend()
-  //
-  // Prepends data to the Cord, which may come from another Cord or other string
-  // data.
-  void Prepend(const Cord& src);
-  void Prepend(absl::string_view src);
-  template <typename T, EnableIfString<T> = 0>
-  void Prepend(T&& src);
-
-  // Cord::RemovePrefix()
-  //
-  // Removes the first `n` bytes of a Cord.
-  void RemovePrefix(size_t n);
-  void RemoveSuffix(size_t n);
-
-  // Cord::Subcord()
-  //
-  // Returns a new Cord representing the subrange [pos, pos + new_size) of
-  // *this. If pos >= size(), the result is empty(). If
-  // (pos + new_size) >= size(), the result is the subrange [pos, size()).
-  Cord Subcord(size_t pos, size_t new_size) const;
-
-  // Cord::swap()
-  //
-  // Swaps the contents of the Cord with `other`.
-  void swap(Cord& other) noexcept;
-
-  // swap()
-  //
-  // Swaps the contents of two Cords.
-  friend void swap(Cord& x, Cord& y) noexcept {
-    x.swap(y);
-  }
-
-  // Cord::size()
-  //
-  // Returns the size of the Cord.
-  size_t size() const;
-
-  // Cord::empty()
-  //
-  // Determines whether the given Cord is empty, returning `true` is so.
-  bool empty() const;
-
-  // Cord::EstimatedMemoryUsage()
-  //
-  // Returns the *approximate* number of bytes held in full or in part by this
-  // Cord (which may not remain the same between invocations).  Note that Cords
-  // that share memory could each be "charged" independently for the same shared
-  // memory.
-  size_t EstimatedMemoryUsage() const;
-
-  // Cord::Compare()
-  //
-  // Compares 'this' Cord with rhs. This function and its relatives treat Cords
-  // as sequences of unsigned bytes. The comparison is a straightforward
-  // lexicographic comparison. `Cord::Compare()` returns values as follows:
-  //
-  //   -1  'this' Cord is smaller
-  //    0  two Cords are equal
-  //    1  'this' Cord is larger
-  int Compare(absl::string_view rhs) const;
-  int Compare(const Cord& rhs) const;
-
-  // Cord::StartsWith()
-  //
-  // Determines whether the Cord starts with the passed string data `rhs`.
-  bool StartsWith(const Cord& rhs) const;
-  bool StartsWith(absl::string_view rhs) const;
-
-  // Cord::EndsWidth()
-  //
-  // Determines whether the Cord ends with the passed string data `rhs`.
-  bool EndsWith(absl::string_view rhs) const;
-  bool EndsWith(const Cord& rhs) const;
-
-  // Cord::operator std::string()
-  //
-  // Converts a Cord into a `std::string()`. This operator is marked explicit to
-  // prevent unintended Cord usage in functions that take a string.
-  explicit operator std::string() const;
-
-  // CopyCordToString()
-  //
-  // Copies the contents of a `src` Cord into a `*dst` string.
-  //
-  // This function optimizes the case of reusing the destination string since it
-  // can reuse previously allocated capacity. However, this function does not
-  // guarantee that pointers previously returned by `dst->data()` remain valid
-  // even if `*dst` had enough capacity to hold `src`. If `*dst` is a new
-  // object, prefer to simply use the conversion operator to `std::string`.
-  friend void CopyCordToString(const Cord& src, std::string* dst);
-
-  class CharIterator;
-
-  //----------------------------------------------------------------------------
-  // Cord::ChunkIterator
-  //----------------------------------------------------------------------------
-  //
-  // A `Cord::ChunkIterator` allows iteration over the constituent chunks of its
-  // Cord. Such iteration allows you to perform non-const operatons on the data
-  // of a Cord without modifying it.
-  //
-  // Generally, you do not instantiate a `Cord::ChunkIterator` directly;
-  // instead, you create one implicitly through use of the `Cord::Chunks()`
-  // member function.
-  //
-  // The `Cord::ChunkIterator` has the following properties:
-  //
-  //   * The iterator is invalidated after any non-const operation on the
-  //     Cord object over which it iterates.
-  //   * The `string_view` returned by dereferencing a valid, non-`end()`
-  //     iterator is guaranteed to be non-empty.
-  //   * Two `ChunkIterator` objects can be compared equal if and only if they
-  //     remain valid and iterate over the same Cord.
-  //   * The iterator in this case is a proxy iterator; the `string_view`
-  //     returned by the iterator does not live inside the Cord, and its
-  //     lifetime is limited to the lifetime of the iterator itself. To help
-  //     prevent lifetime issues, `ChunkIterator::reference` is not a true
-  //     reference type and is equivalent to `value_type`.
-  //   * The iterator keeps state that can grow for Cords that contain many
-  //     nodes and are imbalanced due to sharing. Prefer to pass this type by
-  //     const reference instead of by value.
-  class ChunkIterator {
-   public:
-    using iterator_category = std::input_iterator_tag;
-    using value_type = absl::string_view;
-    using difference_type = ptrdiff_t;
-    using pointer = const value_type*;
-    using reference = value_type;
-
-    ChunkIterator() = default;
-
-    ChunkIterator& operator++();
-    ChunkIterator operator++(int);
-    bool operator==(const ChunkIterator& other) const;
-    bool operator!=(const ChunkIterator& other) const;
-    reference operator*() const;
-    pointer operator->() const;
-
-    friend class Cord;
-    friend class CharIterator;
-
-   private:
-    // Stack of right children of concat nodes that we have to visit.
-    // Keep this at the end of the structure to avoid cache-thrashing.
-    // TODO(jgm): Benchmark to see if there's a more optimal value than 47 for
-    // the inlined vector size (47 exists for backward compatibility).
-    using Stack = absl::InlinedVector<absl::cord_internal::CordRep*, 47>;
-
-    // Constructs a `begin()` iterator from `cord`.
-    explicit ChunkIterator(const Cord* cord);
-
-    // Removes `n` bytes from `current_chunk_`. Expects `n` to be smaller than
-    // `current_chunk_.size()`.
-    void RemoveChunkPrefix(size_t n);
-    Cord AdvanceAndReadBytes(size_t n);
-    void AdvanceBytes(size_t n);
-
-    // Stack specific operator++
-    ChunkIterator& AdvanceStack();
-
-    // Iterates `n` bytes, where `n` is expected to be greater than or equal to
-    // `current_chunk_.size()`.
-    void AdvanceBytesSlowPath(size_t n);
-
-    // A view into bytes of the current `CordRep`. It may only be a view to a
-    // suffix of bytes if this is being used by `CharIterator`.
-    absl::string_view current_chunk_;
-    // The current leaf, or `nullptr` if the iterator points to short data.
-    // If the current chunk is a substring node, current_leaf_ points to the
-    // underlying flat or external node.
-    absl::cord_internal::CordRep* current_leaf_ = nullptr;
-    // The number of bytes left in the `Cord` over which we are iterating.
-    size_t bytes_remaining_ = 0;
-    // See 'Stack' alias definition.
-    Stack stack_of_right_children_;
-  };
-
-  // Cord::ChunkIterator::chunk_begin()
-  //
-  // Returns an iterator to the first chunk of the `Cord`.
-  //
-  // Generally, prefer using `Cord::Chunks()` within a range-based for loop for
-  // iterating over the chunks of a Cord. This method may be useful for getting
-  // a `ChunkIterator` where range-based for-loops are not useful.
-  //
-  // Example:
-  //
-  //   absl::Cord::ChunkIterator FindAsChunk(const absl::Cord& c,
-  //                                         absl::string_view s) {
-  //     return std::find(c.chunk_begin(), c.chunk_end(), s);
-  //   }
-  ChunkIterator chunk_begin() const;
-
-  // Cord::ChunkItertator::chunk_end()
-  //
-  // Returns an iterator one increment past the last chunk of the `Cord`.
-  //
-  // Generally, prefer using `Cord::Chunks()` within a range-based for loop for
-  // iterating over the chunks of a Cord. This method may be useful for getting
-  // a `ChunkIterator` where range-based for-loops may not be available.
-  ChunkIterator chunk_end() const;
-
-  //----------------------------------------------------------------------------
-  // Cord::ChunkIterator::ChunkRange
-  //----------------------------------------------------------------------------
-  //
-  // `ChunkRange` is a helper class for iterating over the chunks of the `Cord`,
-  // producing an iterator which can be used within a range-based for loop.
-  // Construction of a `ChunkRange` will return an iterator pointing to the
-  // first chunk of the Cord. Generally, do not construct a `ChunkRange`
-  // directly; instead, prefer to use the `Cord::Chunks()` method.
-  //
-  // Implementation note: `ChunkRange` is simply a convenience wrapper over
-  // `Cord::chunk_begin()` and `Cord::chunk_end()`.
-  class ChunkRange {
-   public:
-    explicit ChunkRange(const Cord* cord) : cord_(cord) {}
-
-    ChunkIterator begin() const;
-    ChunkIterator end() const;
-
-   private:
-    const Cord* cord_;
-  };
-
-  // Cord::Chunks()
-  //
-  // Returns a `Cord::ChunkIterator::ChunkRange` for iterating over the chunks
-  // of a `Cord` with a range-based for-loop. For most iteration tasks on a
-  // Cord, use `Cord::Chunks()` to retrieve this iterator.
-  //
-  // Example:
-  //
-  //   void ProcessChunks(const Cord& cord) {
-  //     for (absl::string_view chunk : cord.Chunks()) { ... }
-  //   }
-  //
-  // Note that the ordinary caveats of temporary lifetime extension apply:
-  //
-  //   void Process() {
-  //     for (absl::string_view chunk : CordFactory().Chunks()) {
-  //       // The temporary Cord returned by CordFactory has been destroyed!
-  //     }
-  //   }
-  ChunkRange Chunks() const;
-
-  //----------------------------------------------------------------------------
-  // Cord::CharIterator
-  //----------------------------------------------------------------------------
-  //
-  // A `Cord::CharIterator` allows iteration over the constituent characters of
-  // a `Cord`.
-  //
-  // Generally, you do not instantiate a `Cord::CharIterator` directly; instead,
-  // you create one implicitly through use of the `Cord::Chars()` member
-  // function.
-  //
-  // A `Cord::CharIterator` has the following properties:
-  //
-  //   * The iterator is invalidated after any non-const operation on the
-  //     Cord object over which it iterates.
-  //   * Two `CharIterator` objects can be compared equal if and only if they
-  //     remain valid and iterate over the same Cord.
-  //   * The iterator keeps state that can grow for Cords that contain many
-  //     nodes and are imbalanced due to sharing. Prefer to pass this type by
-  //     const reference instead of by value.
-  //   * This type cannot act as a forward iterator because a `Cord` can reuse
-  //     sections of memory. This fact violates the requirement for forward
-  //     iterators to compare equal if dereferencing them returns the same
-  //     object.
-  class CharIterator {
-   public:
-    using iterator_category = std::input_iterator_tag;
-    using value_type = char;
-    using difference_type = ptrdiff_t;
-    using pointer = const char*;
-    using reference = const char&;
-
-    CharIterator() = default;
-
-    CharIterator& operator++();
-    CharIterator operator++(int);
-    bool operator==(const CharIterator& other) const;
-    bool operator!=(const CharIterator& other) const;
-    reference operator*() const;
-    pointer operator->() const;
-
-    friend Cord;
-
-   private:
-    explicit CharIterator(const Cord* cord) : chunk_iterator_(cord) {}
-
-    ChunkIterator chunk_iterator_;
-  };
-
-  // Cord::CharIterator::AdvanceAndRead()
-  //
-  // Advances the `Cord::CharIterator` by `n_bytes` and returns the bytes
-  // advanced as a separate `Cord`. `n_bytes` must be less than or equal to the
-  // number of bytes within the Cord; otherwise, behavior is undefined. It is
-  // valid to pass `char_end()` and `0`.
-  static Cord AdvanceAndRead(CharIterator* it, size_t n_bytes);
-
-  // Cord::CharIterator::Advance()
-  //
-  // Advances the `Cord::CharIterator` by `n_bytes`. `n_bytes` must be less than
-  // or equal to the number of bytes remaining within the Cord; otherwise,
-  // behavior is undefined. It is valid to pass `char_end()` and `0`.
-  static void Advance(CharIterator* it, size_t n_bytes);
-
-  // Cord::CharIterator::ChunkRemaining()
-  //
-  // Returns the longest contiguous view starting at the iterator's position.
-  //
-  // `it` must be dereferenceable.
-  static absl::string_view ChunkRemaining(const CharIterator& it);
-
-  // Cord::CharIterator::char_begin()
-  //
-  // Returns an iterator to the first character of the `Cord`.
-  //
-  // Generally, prefer using `Cord::Chars()` within a range-based for loop for
-  // iterating over the chunks of a Cord. This method may be useful for getting
-  // a `CharIterator` where range-based for-loops may not be available.
-  CharIterator char_begin() const;
-
-  // Cord::CharIterator::char_end()
-  //
-  // Returns an iterator to one past the last character of the `Cord`.
-  //
-  // Generally, prefer using `Cord::Chars()` within a range-based for loop for
-  // iterating over the chunks of a Cord. This method may be useful for getting
-  // a `CharIterator` where range-based for-loops are not useful.
-  CharIterator char_end() const;
-
-  // Cord::CharIterator::CharRange
-  //
-  // `CharRange` is a helper class for iterating over the characters of a
-  // producing an iterator which can be used within a range-based for loop.
-  // Construction of a `CharRange` will return an iterator pointing to the first
-  // character of the Cord. Generally, do not construct a `CharRange` directly;
-  // instead, prefer to use the `Cord::Chars()` method show below.
-  //
-  // Implementation note: `CharRange` is simply a convenience wrapper over
-  // `Cord::char_begin()` and `Cord::char_end()`.
-  class CharRange {
-   public:
-    explicit CharRange(const Cord* cord) : cord_(cord) {}
-
-    CharIterator begin() const;
-    CharIterator end() const;
-
-   private:
-    const Cord* cord_;
-  };
-
-  // Cord::CharIterator::Chars()
-  //
-  // Returns a `Cord::CharIterator` for iterating over the characters of a
-  // `Cord` with a range-based for-loop. For most character-based iteration
-  // tasks on a Cord, use `Cord::Chars()` to retrieve this iterator.
-  //
-  // Example:
-  //
-  //   void ProcessCord(const Cord& cord) {
-  //     for (char c : cord.Chars()) { ... }
-  //   }
-  //
-  // Note that the ordinary caveats of temporary lifetime extension apply:
-  //
-  //   void Process() {
-  //     for (char c : CordFactory().Chars()) {
-  //       // The temporary Cord returned by CordFactory has been destroyed!
-  //     }
-  //   }
-  CharRange Chars() const;
-
-  // Cord::operator[]
-  //
-  // Gets the "i"th character of the Cord and returns it, provided that
-  // 0 <= i < Cord.size().
-  //
-  // NOTE: This routine is reasonably efficient. It is roughly
-  // logarithmic based on the number of chunks that make up the cord. Still,
-  // if you need to iterate over the contents of a cord, you should
-  // use a CharIterator/ChunkIterator rather than call operator[] or Get()
-  // repeatedly in a loop.
-  char operator[](size_t i) const;
-
-  // Cord::TryFlat()
-  //
-  // If this cord's representation is a single flat array, returns a
-  // string_view referencing that array.  Otherwise returns nullopt.
-  absl::optional<absl::string_view> TryFlat() const;
-
-  // Cord::Flatten()
-  //
-  // Flattens the cord into a single array and returns a view of the data.
-  //
-  // If the cord was already flat, the contents are not modified.
-  absl::string_view Flatten();
-
-  // Supports absl::Cord as a sink object for absl::Format().
-  friend void AbslFormatFlush(absl::Cord* cord, absl::string_view part) {
-    cord->Append(part);
-  }
-
-  template <typename H>
-  friend H AbslHashValue(H hash_state, const absl::Cord& c) {
-    absl::optional<absl::string_view> maybe_flat = c.TryFlat();
-    if (maybe_flat.has_value()) {
-      return H::combine(std::move(hash_state), *maybe_flat);
-    }
-    return c.HashFragmented(std::move(hash_state));
-  }
-
-  // Create a Cord with the contents of StringConstant<T>::value.
-  // No allocations will be done and no data will be copied.
-  // This is an INTERNAL API and subject to change or removal. This API can only
-  // be used by spelling absl::strings_internal::MakeStringConstant, which is
-  // also an internal API.
-  template <typename T>
-  explicit constexpr Cord(strings_internal::StringConstant<T>);
-
- private:
-  friend class CordTestPeer;
-  friend bool operator==(const Cord& lhs, const Cord& rhs);
-  friend bool operator==(const Cord& lhs, absl::string_view rhs);
-
-  // Calls the provided function once for each cord chunk, in order.  Unlike
-  // Chunks(), this API will not allocate memory.
-  void ForEachChunk(absl::FunctionRef<void(absl::string_view)>) const;
-
-  // Allocates new contiguous storage for the contents of the cord. This is
-  // called by Flatten() when the cord was not already flat.
-  absl::string_view FlattenSlowPath();
-
-  // Actual cord contents are hidden inside the following simple
-  // class so that we can isolate the bulk of cord.cc from changes
-  // to the representation.
-  //
-  // InlineRep holds either a tree pointer, or an array of kMaxInline bytes.
-  class InlineRep {
-   public:
-    static constexpr unsigned char kMaxInline = cord_internal::kMaxInline;
-    static_assert(kMaxInline >= sizeof(absl::cord_internal::CordRep*), "");
-    static constexpr unsigned char kTreeFlag = cord_internal::kTreeFlag;
-    static constexpr unsigned char kProfiledFlag = cord_internal::kProfiledFlag;
-
-    constexpr InlineRep() : data_() {}
-    InlineRep(const InlineRep& src);
-    InlineRep(InlineRep&& src);
-    InlineRep& operator=(const InlineRep& src);
-    InlineRep& operator=(InlineRep&& src) noexcept;
-
-    explicit constexpr InlineRep(cord_internal::InlineData data);
-
-    void Swap(InlineRep* rhs);
-    bool empty() const;
-    size_t size() const;
-    const char* data() const;  // Returns nullptr if holding pointer
-    void set_data(const char* data, size_t n,
-                  bool nullify_tail);  // Discards pointer, if any
-    char* set_data(size_t n);  // Write data to the result
-    // Returns nullptr if holding bytes
-    absl::cord_internal::CordRep* tree() const;
-    // Discards old pointer, if any
-    void set_tree(absl::cord_internal::CordRep* rep);
-    // Replaces a tree with a new root. This is faster than set_tree, but it
-    // should only be used when it's clear that the old rep was a tree.
-    void replace_tree(absl::cord_internal::CordRep* rep);
-    // Returns non-null iff was holding a pointer
-    absl::cord_internal::CordRep* clear();
-    // Converts to pointer if necessary.
-    absl::cord_internal::CordRep* force_tree(size_t extra_hint);
-    void reduce_size(size_t n);  // REQUIRES: holding data
-    void remove_prefix(size_t n);  // REQUIRES: holding data
-    void AppendArray(const char* src_data, size_t src_size);
-    absl::string_view FindFlatStartPiece() const;
-    void AppendTree(absl::cord_internal::CordRep* tree);
-    void PrependTree(absl::cord_internal::CordRep* tree);
-    void GetAppendRegion(char** region, size_t* size, size_t max_length);
-    void GetAppendRegion(char** region, size_t* size);
-    bool IsSame(const InlineRep& other) const {
-      return memcmp(&data_, &other.data_, sizeof(data_)) == 0;
-    }
-    int BitwiseCompare(const InlineRep& other) const {
-      uint64_t x, y;
-      // Use memcpy to avoid aliasing issues.
-      memcpy(&x, &data_, sizeof(x));
-      memcpy(&y, &other.data_, sizeof(y));
-      if (x == y) {
-        memcpy(&x, reinterpret_cast<const char*>(&data_) + 8, sizeof(x));
-        memcpy(&y, reinterpret_cast<const char*>(&other.data_) + 8, sizeof(y));
-        if (x == y) return 0;
-      }
-      return absl::big_endian::FromHost64(x) < absl::big_endian::FromHost64(y)
-                 ? -1
-                 : 1;
-    }
-    void CopyTo(std::string* dst) const {
-      // memcpy is much faster when operating on a known size. On most supported
-      // platforms, the small string optimization is large enough that resizing
-      // to 15 bytes does not cause a memory allocation.
-      absl::strings_internal::STLStringResizeUninitialized(dst,
-                                                           sizeof(data_) - 1);
-      memcpy(&(*dst)[0], &data_, sizeof(data_) - 1);
-      // erase is faster than resize because the logic for memory allocation is
-      // not needed.
-      dst->erase(tagged_size());
-    }
-
-    // Copies the inline contents into `dst`. Assumes the cord is not empty.
-    void CopyToArray(char* dst) const;
-
-    bool is_tree() const { return tagged_size() > kMaxInline; }
-
-   private:
-    friend class Cord;
-
-    void AssignSlow(const InlineRep& src);
-    // Unrefs the tree, stops profiling, and zeroes the contents
-    void ClearSlow();
-
-    void ResetToEmpty() { data_ = {}; }
-
-    // This uses reinterpret_cast instead of the union to avoid accessing the
-    // inactive union element. The tagged size is not a common prefix.
-    void set_tagged_size(char new_tag) {
-      reinterpret_cast<char*>(&data_)[kMaxInline] = new_tag;
-    }
-    char tagged_size() const {
-      return reinterpret_cast<const char*>(&data_)[kMaxInline];
-    }
-
-    cord_internal::InlineData data_;
-  };
-  InlineRep contents_;
-
-  // Helper for MemoryUsage().
-  static size_t MemoryUsageAux(const absl::cord_internal::CordRep* rep);
-
-  // Helper for GetFlat() and TryFlat().
-  static bool GetFlatAux(absl::cord_internal::CordRep* rep,
-                         absl::string_view* fragment);
-
-  // Helper for ForEachChunk().
-  static void ForEachChunkAux(
-      absl::cord_internal::CordRep* rep,
-      absl::FunctionRef<void(absl::string_view)> callback);
-
-  // The destructor for non-empty Cords.
-  void DestroyCordSlow();
-
-  // Out-of-line implementation of slower parts of logic.
-  void CopyToArraySlowPath(char* dst) const;
-  int CompareSlowPath(absl::string_view rhs, size_t compared_size,
-                      size_t size_to_compare) const;
-  int CompareSlowPath(const Cord& rhs, size_t compared_size,
-                      size_t size_to_compare) const;
-  bool EqualsImpl(absl::string_view rhs, size_t size_to_compare) const;
-  bool EqualsImpl(const Cord& rhs, size_t size_to_compare) const;
-  int CompareImpl(const Cord& rhs) const;
-
-  template <typename ResultType, typename RHS>
-  friend ResultType GenericCompare(const Cord& lhs, const RHS& rhs,
-                                   size_t size_to_compare);
-  static absl::string_view GetFirstChunk(const Cord& c);
-  static absl::string_view GetFirstChunk(absl::string_view sv);
-
-  // Returns a new reference to contents_.tree(), or steals an existing
-  // reference if called on an rvalue.
-  absl::cord_internal::CordRep* TakeRep() const&;
-  absl::cord_internal::CordRep* TakeRep() &&;
-
-  // Helper for Append().
-  template <typename C>
-  void AppendImpl(C&& src);
-
-  // Helper for AbslHashValue().
-  template <typename H>
-  H HashFragmented(H hash_state) const {
-    typename H::AbslInternalPiecewiseCombiner combiner;
-    ForEachChunk([&combiner, &hash_state](absl::string_view chunk) {
-      hash_state = combiner.add_buffer(std::move(hash_state), chunk.data(),
-                                       chunk.size());
-    });
-    return H::combine(combiner.finalize(std::move(hash_state)), size());
-  }
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// allow a Cord to be logged
-extern std::ostream& operator<<(std::ostream& out, const Cord& cord);
-
-// ------------------------------------------------------------------
-// Internal details follow.  Clients should ignore.
-
-namespace cord_internal {
-
-// Fast implementation of memmove for up to 15 bytes. This implementation is
-// safe for overlapping regions. If nullify_tail is true, the destination is
-// padded with '\0' up to 16 bytes.
-inline void SmallMemmove(char* dst, const char* src, size_t n,
-                         bool nullify_tail = false) {
-  if (n >= 8) {
-    assert(n <= 16);
-    uint64_t buf1;
-    uint64_t buf2;
-    memcpy(&buf1, src, 8);
-    memcpy(&buf2, src + n - 8, 8);
-    if (nullify_tail) {
-      memset(dst + 8, 0, 8);
-    }
-    memcpy(dst, &buf1, 8);
-    memcpy(dst + n - 8, &buf2, 8);
-  } else if (n >= 4) {
-    uint32_t buf1;
-    uint32_t buf2;
-    memcpy(&buf1, src, 4);
-    memcpy(&buf2, src + n - 4, 4);
-    if (nullify_tail) {
-      memset(dst + 4, 0, 4);
-      memset(dst + 8, 0, 8);
-    }
-    memcpy(dst, &buf1, 4);
-    memcpy(dst + n - 4, &buf2, 4);
-  } else {
-    if (n != 0) {
-      dst[0] = src[0];
-      dst[n / 2] = src[n / 2];
-      dst[n - 1] = src[n - 1];
-    }
-    if (nullify_tail) {
-      memset(dst + 8, 0, 8);
-      memset(dst + n, 0, 8);
-    }
-  }
-}
-
-// Does non-template-specific `CordRepExternal` initialization.
-// Expects `data` to be non-empty.
-void InitializeCordRepExternal(absl::string_view data, CordRepExternal* rep);
-
-// Creates a new `CordRep` that owns `data` and `releaser` and returns a pointer
-// to it, or `nullptr` if `data` was empty.
-template <typename Releaser>
-// NOLINTNEXTLINE - suppress clang-tidy raw pointer return.
-CordRep* NewExternalRep(absl::string_view data, Releaser&& releaser) {
-  using ReleaserType = absl::decay_t<Releaser>;
-  if (data.empty()) {
-    // Never create empty external nodes.
-    InvokeReleaser(Rank0{}, ReleaserType(std::forward<Releaser>(releaser)),
-                   data);
-    return nullptr;
-  }
-
-  CordRepExternal* rep = new CordRepExternalImpl<ReleaserType>(
-      std::forward<Releaser>(releaser), 0);
-  InitializeCordRepExternal(data, rep);
-  return rep;
-}
-
-// Overload for function reference types that dispatches using a function
-// pointer because there are no `alignof()` or `sizeof()` a function reference.
-// NOLINTNEXTLINE - suppress clang-tidy raw pointer return.
-inline CordRep* NewExternalRep(absl::string_view data,
-                               void (&releaser)(absl::string_view)) {
-  return NewExternalRep(data, &releaser);
-}
-
-}  // namespace cord_internal
-
-template <typename Releaser>
-Cord MakeCordFromExternal(absl::string_view data, Releaser&& releaser) {
-  Cord cord;
-  cord.contents_.set_tree(::absl::cord_internal::NewExternalRep(
-      data, std::forward<Releaser>(releaser)));
-  return cord;
-}
-
-constexpr Cord::InlineRep::InlineRep(cord_internal::InlineData data)
-    : data_(data) {}
-
-inline Cord::InlineRep::InlineRep(const Cord::InlineRep& src) {
-  data_ = src.data_;
-}
-
-inline Cord::InlineRep::InlineRep(Cord::InlineRep&& src) {
-  data_ = src.data_;
-  src.ResetToEmpty();
-}
-
-inline Cord::InlineRep& Cord::InlineRep::operator=(const Cord::InlineRep& src) {
-  if (this == &src) {
-    return *this;
-  }
-  if (!is_tree() && !src.is_tree()) {
-    data_ = src.data_;
-    return *this;
-  }
-  AssignSlow(src);
-  return *this;
-}
-
-inline Cord::InlineRep& Cord::InlineRep::operator=(
-    Cord::InlineRep&& src) noexcept {
-  if (is_tree()) {
-    ClearSlow();
-  }
-  data_ = src.data_;
-  src.ResetToEmpty();
-  return *this;
-}
-
-inline void Cord::InlineRep::Swap(Cord::InlineRep* rhs) {
-  if (rhs == this) {
-    return;
-  }
-
-  std::swap(data_, rhs->data_);
-}
-
-inline const char* Cord::InlineRep::data() const {
-  return is_tree() ? nullptr : data_.as_chars;
-}
-
-inline absl::cord_internal::CordRep* Cord::InlineRep::tree() const {
-  if (is_tree()) {
-    return data_.as_tree.rep;
-  } else {
-    return nullptr;
-  }
-}
-
-inline bool Cord::InlineRep::empty() const { return tagged_size() == 0; }
-
-inline size_t Cord::InlineRep::size() const {
-  const char tag = tagged_size();
-  if (tag <= kMaxInline) return tag;
-  return static_cast<size_t>(tree()->length);
-}
-
-inline void Cord::InlineRep::set_tree(absl::cord_internal::CordRep* rep) {
-  if (rep == nullptr) {
-    ResetToEmpty();
-  } else {
-    bool was_tree = is_tree();
-    data_.as_tree = {rep, {}, tagged_size()};
-    if (!was_tree) {
-      // If we were not a tree already, set the tag.
-      // Otherwise, leave it alone because it might have the profile bit on.
-      set_tagged_size(kTreeFlag);
-    }
-  }
-}
-
-inline void Cord::InlineRep::replace_tree(absl::cord_internal::CordRep* rep) {
-  ABSL_ASSERT(is_tree());
-  if (ABSL_PREDICT_FALSE(rep == nullptr)) {
-    set_tree(rep);
-    return;
-  }
-  data_.as_tree = {rep, {}, tagged_size()};
-}
-
-inline absl::cord_internal::CordRep* Cord::InlineRep::clear() {
-  absl::cord_internal::CordRep* result = tree();
-  ResetToEmpty();
-  return result;
-}
-
-inline void Cord::InlineRep::CopyToArray(char* dst) const {
-  assert(!is_tree());
-  size_t n = tagged_size();
-  assert(n != 0);
-  cord_internal::SmallMemmove(dst, data_.as_chars, n);
-}
-
-constexpr inline Cord::Cord() noexcept {}
-
-template <typename T>
-constexpr Cord::Cord(strings_internal::StringConstant<T>)
-    : contents_(strings_internal::StringConstant<T>::value.size() <=
-                        cord_internal::kMaxInline
-                    ? cord_internal::InlineData(
-                          strings_internal::StringConstant<T>::value)
-                    : cord_internal::InlineData(cord_internal::AsTree{
-                          &cord_internal::ConstInitExternalStorage<
-                              strings_internal::StringConstant<T>>::value,
-                          {},
-                          cord_internal::kTreeFlag})) {}
-
-inline Cord& Cord::operator=(const Cord& x) {
-  contents_ = x.contents_;
-  return *this;
-}
-
-inline Cord::Cord(Cord&& src) noexcept : contents_(std::move(src.contents_)) {}
-
-inline void Cord::swap(Cord& other) noexcept {
-  contents_.Swap(&other.contents_);
-}
-
-inline Cord& Cord::operator=(Cord&& x) noexcept {
-  contents_ = std::move(x.contents_);
-  return *this;
-}
-
-extern template Cord::Cord(std::string&& src);
-extern template Cord& Cord::operator=(std::string&& src);
-
-inline size_t Cord::size() const {
-  // Length is 1st field in str.rep_
-  return contents_.size();
-}
-
-inline bool Cord::empty() const { return contents_.empty(); }
-
-inline size_t Cord::EstimatedMemoryUsage() const {
-  size_t result = sizeof(Cord);
-  if (const absl::cord_internal::CordRep* rep = contents_.tree()) {
-    result += MemoryUsageAux(rep);
-  }
-  return result;
-}
-
-inline absl::optional<absl::string_view> Cord::TryFlat() const {
-  absl::cord_internal::CordRep* rep = contents_.tree();
-  if (rep == nullptr) {
-    return absl::string_view(contents_.data(), contents_.size());
-  }
-  absl::string_view fragment;
-  if (GetFlatAux(rep, &fragment)) {
-    return fragment;
-  }
-  return absl::nullopt;
-}
-
-inline absl::string_view Cord::Flatten() {
-  absl::cord_internal::CordRep* rep = contents_.tree();
-  if (rep == nullptr) {
-    return absl::string_view(contents_.data(), contents_.size());
-  } else {
-    absl::string_view already_flat_contents;
-    if (GetFlatAux(rep, &already_flat_contents)) {
-      return already_flat_contents;
-    }
-  }
-  return FlattenSlowPath();
-}
-
-inline void Cord::Append(absl::string_view src) {
-  contents_.AppendArray(src.data(), src.size());
-}
-
-extern template void Cord::Append(std::string&& src);
-extern template void Cord::Prepend(std::string&& src);
-
-inline int Cord::Compare(const Cord& rhs) const {
-  if (!contents_.is_tree() && !rhs.contents_.is_tree()) {
-    return contents_.BitwiseCompare(rhs.contents_);
-  }
-
-  return CompareImpl(rhs);
-}
-
-// Does 'this' cord start/end with rhs
-inline bool Cord::StartsWith(const Cord& rhs) const {
-  if (contents_.IsSame(rhs.contents_)) return true;
-  size_t rhs_size = rhs.size();
-  if (size() < rhs_size) return false;
-  return EqualsImpl(rhs, rhs_size);
-}
-
-inline bool Cord::StartsWith(absl::string_view rhs) const {
-  size_t rhs_size = rhs.size();
-  if (size() < rhs_size) return false;
-  return EqualsImpl(rhs, rhs_size);
-}
-
-inline Cord::ChunkIterator::ChunkIterator(const Cord* cord)
-    : bytes_remaining_(cord->size()) {
-  if (cord->empty()) return;
-  if (cord->contents_.is_tree()) {
-    stack_of_right_children_.push_back(cord->contents_.tree());
-    operator++();
-  } else {
-    current_chunk_ = absl::string_view(cord->contents_.data(), cord->size());
-  }
-}
-
-inline Cord::ChunkIterator& Cord::ChunkIterator::operator++() {
-  ABSL_HARDENING_ASSERT(bytes_remaining_ > 0 &&
-                        "Attempted to iterate past `end()`");
-  assert(bytes_remaining_ >= current_chunk_.size());
-  bytes_remaining_ -= current_chunk_.size();
-  if (bytes_remaining_ > 0) {
-    return AdvanceStack();
-  } else {
-    current_chunk_ = {};
-  }
-  return *this;
-}
-
-inline Cord::ChunkIterator Cord::ChunkIterator::operator++(int) {
-  ChunkIterator tmp(*this);
-  operator++();
-  return tmp;
-}
-
-inline bool Cord::ChunkIterator::operator==(const ChunkIterator& other) const {
-  return bytes_remaining_ == other.bytes_remaining_;
-}
-
-inline bool Cord::ChunkIterator::operator!=(const ChunkIterator& other) const {
-  return !(*this == other);
-}
-
-inline Cord::ChunkIterator::reference Cord::ChunkIterator::operator*() const {
-  ABSL_HARDENING_ASSERT(bytes_remaining_ != 0);
-  return current_chunk_;
-}
-
-inline Cord::ChunkIterator::pointer Cord::ChunkIterator::operator->() const {
-  ABSL_HARDENING_ASSERT(bytes_remaining_ != 0);
-  return &current_chunk_;
-}
-
-inline void Cord::ChunkIterator::RemoveChunkPrefix(size_t n) {
-  assert(n < current_chunk_.size());
-  current_chunk_.remove_prefix(n);
-  bytes_remaining_ -= n;
-}
-
-inline void Cord::ChunkIterator::AdvanceBytes(size_t n) {
-  if (ABSL_PREDICT_TRUE(n < current_chunk_.size())) {
-    RemoveChunkPrefix(n);
-  } else if (n != 0) {
-    AdvanceBytesSlowPath(n);
-  }
-}
-
-inline Cord::ChunkIterator Cord::chunk_begin() const {
-  return ChunkIterator(this);
-}
-
-inline Cord::ChunkIterator Cord::chunk_end() const { return ChunkIterator(); }
-
-inline Cord::ChunkIterator Cord::ChunkRange::begin() const {
-  return cord_->chunk_begin();
-}
-
-inline Cord::ChunkIterator Cord::ChunkRange::end() const {
-  return cord_->chunk_end();
-}
-
-inline Cord::ChunkRange Cord::Chunks() const { return ChunkRange(this); }
-
-inline Cord::CharIterator& Cord::CharIterator::operator++() {
-  if (ABSL_PREDICT_TRUE(chunk_iterator_->size() > 1)) {
-    chunk_iterator_.RemoveChunkPrefix(1);
-  } else {
-    ++chunk_iterator_;
-  }
-  return *this;
-}
-
-inline Cord::CharIterator Cord::CharIterator::operator++(int) {
-  CharIterator tmp(*this);
-  operator++();
-  return tmp;
-}
-
-inline bool Cord::CharIterator::operator==(const CharIterator& other) const {
-  return chunk_iterator_ == other.chunk_iterator_;
-}
-
-inline bool Cord::CharIterator::operator!=(const CharIterator& other) const {
-  return !(*this == other);
-}
-
-inline Cord::CharIterator::reference Cord::CharIterator::operator*() const {
-  return *chunk_iterator_->data();
-}
-
-inline Cord::CharIterator::pointer Cord::CharIterator::operator->() const {
-  return chunk_iterator_->data();
-}
-
-inline Cord Cord::AdvanceAndRead(CharIterator* it, size_t n_bytes) {
-  assert(it != nullptr);
-  return it->chunk_iterator_.AdvanceAndReadBytes(n_bytes);
-}
-
-inline void Cord::Advance(CharIterator* it, size_t n_bytes) {
-  assert(it != nullptr);
-  it->chunk_iterator_.AdvanceBytes(n_bytes);
-}
-
-inline absl::string_view Cord::ChunkRemaining(const CharIterator& it) {
-  return *it.chunk_iterator_;
-}
-
-inline Cord::CharIterator Cord::char_begin() const {
-  return CharIterator(this);
-}
-
-inline Cord::CharIterator Cord::char_end() const { return CharIterator(); }
-
-inline Cord::CharIterator Cord::CharRange::begin() const {
-  return cord_->char_begin();
-}
-
-inline Cord::CharIterator Cord::CharRange::end() const {
-  return cord_->char_end();
-}
-
-inline Cord::CharRange Cord::Chars() const { return CharRange(this); }
-
-inline void Cord::ForEachChunk(
-    absl::FunctionRef<void(absl::string_view)> callback) const {
-  absl::cord_internal::CordRep* rep = contents_.tree();
-  if (rep == nullptr) {
-    callback(absl::string_view(contents_.data(), contents_.size()));
-  } else {
-    return ForEachChunkAux(rep, callback);
-  }
-}
-
-// Nonmember Cord-to-Cord relational operarators.
-inline bool operator==(const Cord& lhs, const Cord& rhs) {
-  if (lhs.contents_.IsSame(rhs.contents_)) return true;
-  size_t rhs_size = rhs.size();
-  if (lhs.size() != rhs_size) return false;
-  return lhs.EqualsImpl(rhs, rhs_size);
-}
-
-inline bool operator!=(const Cord& x, const Cord& y) { return !(x == y); }
-inline bool operator<(const Cord& x, const Cord& y) {
-  return x.Compare(y) < 0;
-}
-inline bool operator>(const Cord& x, const Cord& y) {
-  return x.Compare(y) > 0;
-}
-inline bool operator<=(const Cord& x, const Cord& y) {
-  return x.Compare(y) <= 0;
-}
-inline bool operator>=(const Cord& x, const Cord& y) {
-  return x.Compare(y) >= 0;
-}
-
-// Nonmember Cord-to-absl::string_view relational operators.
-//
-// Due to implicit conversions, these also enable comparisons of Cord with
-// with std::string, ::string, and const char*.
-inline bool operator==(const Cord& lhs, absl::string_view rhs) {
-  size_t lhs_size = lhs.size();
-  size_t rhs_size = rhs.size();
-  if (lhs_size != rhs_size) return false;
-  return lhs.EqualsImpl(rhs, rhs_size);
-}
-
-inline bool operator==(absl::string_view x, const Cord& y) { return y == x; }
-inline bool operator!=(const Cord& x, absl::string_view y) { return !(x == y); }
-inline bool operator!=(absl::string_view x, const Cord& y) { return !(x == y); }
-inline bool operator<(const Cord& x, absl::string_view y) {
-  return x.Compare(y) < 0;
-}
-inline bool operator<(absl::string_view x, const Cord& y) {
-  return y.Compare(x) > 0;
-}
-inline bool operator>(const Cord& x, absl::string_view y) { return y < x; }
-inline bool operator>(absl::string_view x, const Cord& y) { return y < x; }
-inline bool operator<=(const Cord& x, absl::string_view y) { return !(y < x); }
-inline bool operator<=(absl::string_view x, const Cord& y) { return !(y < x); }
-inline bool operator>=(const Cord& x, absl::string_view y) { return !(x < y); }
-inline bool operator>=(absl::string_view x, const Cord& y) { return !(x < y); }
-
-// Some internals exposed to test code.
-namespace strings_internal {
-class CordTestAccess {
- public:
-  static size_t FlatOverhead();
-  static size_t MaxFlatLength();
-  static size_t SizeofCordRepConcat();
-  static size_t SizeofCordRepExternal();
-  static size_t SizeofCordRepSubstring();
-  static size_t FlatTagToLength(uint8_t tag);
-  static uint8_t LengthToTag(size_t s);
-};
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_CORD_H_
diff --git a/third_party/abseil/absl/strings/cord_test.cc b/third_party/abseil/absl/strings/cord_test.cc
deleted file mode 100644
index 7942bfc..0000000
--- a/third_party/abseil/absl/strings/cord_test.cc
+++ /dev/null
@@ -1,1711 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/cord.h"
-
-#include <algorithm>
-#include <climits>
-#include <cstdio>
-#include <iterator>
-#include <map>
-#include <numeric>
-#include <random>
-#include <sstream>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/casts.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/container/fixed_array.h"
-#include "absl/strings/cord_test_helpers.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/string_view.h"
-
-typedef std::mt19937_64 RandomEngine;
-
-static std::string RandomLowercaseString(RandomEngine* rng);
-static std::string RandomLowercaseString(RandomEngine* rng, size_t length);
-
-static int GetUniformRandomUpTo(RandomEngine* rng, int upper_bound) {
-  if (upper_bound > 0) {
-    std::uniform_int_distribution<int> uniform(0, upper_bound - 1);
-    return uniform(*rng);
-  } else {
-    return 0;
-  }
-}
-
-static size_t GetUniformRandomUpTo(RandomEngine* rng, size_t upper_bound) {
-  if (upper_bound > 0) {
-    std::uniform_int_distribution<size_t> uniform(0, upper_bound - 1);
-    return uniform(*rng);
-  } else {
-    return 0;
-  }
-}
-
-static int32_t GenerateSkewedRandom(RandomEngine* rng, int max_log) {
-  const uint32_t base = (*rng)() % (max_log + 1);
-  const uint32_t mask = ((base < 32) ? (1u << base) : 0u) - 1u;
-  return (*rng)() & mask;
-}
-
-static std::string RandomLowercaseString(RandomEngine* rng) {
-  int length;
-  std::bernoulli_distribution one_in_1k(0.001);
-  std::bernoulli_distribution one_in_10k(0.0001);
-  // With low probability, make a large fragment
-  if (one_in_10k(*rng)) {
-    length = GetUniformRandomUpTo(rng, 1048576);
-  } else if (one_in_1k(*rng)) {
-    length = GetUniformRandomUpTo(rng, 10000);
-  } else {
-    length = GenerateSkewedRandom(rng, 10);
-  }
-  return RandomLowercaseString(rng, length);
-}
-
-static std::string RandomLowercaseString(RandomEngine* rng, size_t length) {
-  std::string result(length, '\0');
-  std::uniform_int_distribution<int> chars('a', 'z');
-  std::generate(result.begin(), result.end(),
-                [&]() { return static_cast<char>(chars(*rng)); });
-  return result;
-}
-
-static void DoNothing(absl::string_view /* data */, void* /* arg */) {}
-
-static void DeleteExternalString(absl::string_view data, void* arg) {
-  std::string* s = reinterpret_cast<std::string*>(arg);
-  EXPECT_EQ(data, *s);
-  delete s;
-}
-
-// Add "s" to *dst via `MakeCordFromExternal`
-static void AddExternalMemory(absl::string_view s, absl::Cord* dst) {
-  std::string* str = new std::string(s.data(), s.size());
-  dst->Append(absl::MakeCordFromExternal(*str, [str](absl::string_view data) {
-    DeleteExternalString(data, str);
-  }));
-}
-
-static void DumpGrowth() {
-  absl::Cord str;
-  for (int i = 0; i < 1000; i++) {
-    char c = 'a' + i % 26;
-    str.Append(absl::string_view(&c, 1));
-  }
-}
-
-// Make a Cord with some number of fragments.  Return the size (in bytes)
-// of the smallest fragment.
-static size_t AppendWithFragments(const std::string& s, RandomEngine* rng,
-                                  absl::Cord* cord) {
-  size_t j = 0;
-  const size_t max_size = s.size() / 5;  // Make approx. 10 fragments
-  size_t min_size = max_size;            // size of smallest fragment
-  while (j < s.size()) {
-    size_t N = 1 + GetUniformRandomUpTo(rng, max_size);
-    if (N > (s.size() - j)) {
-      N = s.size() - j;
-    }
-    if (N < min_size) {
-      min_size = N;
-    }
-
-    std::bernoulli_distribution coin_flip(0.5);
-    if (coin_flip(*rng)) {
-      // Grow by adding an external-memory.
-      AddExternalMemory(absl::string_view(s.data() + j, N), cord);
-    } else {
-      cord->Append(absl::string_view(s.data() + j, N));
-    }
-    j += N;
-  }
-  return min_size;
-}
-
-// Add an external memory that contains the specified std::string to cord
-static void AddNewStringBlock(const std::string& str, absl::Cord* dst) {
-  char* data = new char[str.size()];
-  memcpy(data, str.data(), str.size());
-  dst->Append(absl::MakeCordFromExternal(
-      absl::string_view(data, str.size()),
-      [](absl::string_view s) { delete[] s.data(); }));
-}
-
-// Make a Cord out of many different types of nodes.
-static absl::Cord MakeComposite() {
-  absl::Cord cord;
-  cord.Append("the");
-  AddExternalMemory(" quick brown", &cord);
-  AddExternalMemory(" fox jumped", &cord);
-
-  absl::Cord full(" over");
-  AddExternalMemory(" the lazy", &full);
-  AddNewStringBlock(" dog slept the whole day away", &full);
-  absl::Cord substring = full.Subcord(0, 18);
-
-  // Make substring long enough to defeat the copying fast path in Append.
-  substring.Append(std::string(1000, '.'));
-  cord.Append(substring);
-  cord = cord.Subcord(0, cord.size() - 998);  // Remove most of extra junk
-
-  return cord;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class CordTestPeer {
- public:
-  static void ForEachChunk(
-      const Cord& c, absl::FunctionRef<void(absl::string_view)> callback) {
-    c.ForEachChunk(callback);
-  }
-
-  static bool IsTree(const Cord& c) { return c.contents_.is_tree(); }
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-TEST(Cord, AllFlatSizes) {
-  using absl::strings_internal::CordTestAccess;
-
-  for (size_t s = 0; s < CordTestAccess::MaxFlatLength(); s++) {
-    // Make a string of length s.
-    std::string src;
-    while (src.size() < s) {
-      src.push_back('a' + (src.size() % 26));
-    }
-
-    absl::Cord dst(src);
-    EXPECT_EQ(std::string(dst), src) << s;
-  }
-}
-
-// We create a Cord at least 128GB in size using the fact that Cords can
-// internally reference-count; thus the Cord is enormous without actually
-// consuming very much memory.
-TEST(GigabyteCord, FromExternal) {
-  const size_t one_gig = 1024U * 1024U * 1024U;
-  size_t max_size = 2 * one_gig;
-  if (sizeof(max_size) > 4) max_size = 128 * one_gig;
-
-  size_t length = 128 * 1024;
-  char* data = new char[length];
-  absl::Cord from = absl::MakeCordFromExternal(
-      absl::string_view(data, length),
-      [](absl::string_view sv) { delete[] sv.data(); });
-
-  // This loop may seem odd due to its combination of exponential doubling of
-  // size and incremental size increases.  We do it incrementally to be sure the
-  // Cord will need rebalancing and will exercise code that, in the past, has
-  // caused crashes in production.  We grow exponentially so that the code will
-  // execute in a reasonable amount of time.
-  absl::Cord c;
-  ABSL_RAW_LOG(INFO, "Made a Cord with %zu bytes!", c.size());
-  c.Append(from);
-  while (c.size() < max_size) {
-    c.Append(c);
-    c.Append(from);
-    c.Append(from);
-    c.Append(from);
-    c.Append(from);
-  }
-
-  for (int i = 0; i < 1024; ++i) {
-    c.Append(from);
-  }
-  ABSL_RAW_LOG(INFO, "Made a Cord with %zu bytes!", c.size());
-  // Note: on a 32-bit build, this comes out to   2,818,048,000 bytes.
-  // Note: on a 64-bit build, this comes out to 171,932,385,280 bytes.
-}
-
-static absl::Cord MakeExternalCord(int size) {
-  char* buffer = new char[size];
-  memset(buffer, 'x', size);
-  absl::Cord cord;
-  cord.Append(absl::MakeCordFromExternal(
-      absl::string_view(buffer, size),
-      [](absl::string_view s) { delete[] s.data(); }));
-  return cord;
-}
-
-// Extern to fool clang that this is not constant. Needed to suppress
-// a warning of unsafe code we want to test.
-extern bool my_unique_true_boolean;
-bool my_unique_true_boolean = true;
-
-TEST(Cord, Assignment) {
-  absl::Cord x(absl::string_view("hi there"));
-  absl::Cord y(x);
-  ASSERT_EQ(std::string(x), "hi there");
-  ASSERT_EQ(std::string(y), "hi there");
-  ASSERT_TRUE(x == y);
-  ASSERT_TRUE(x <= y);
-  ASSERT_TRUE(y <= x);
-
-  x = absl::string_view("foo");
-  ASSERT_EQ(std::string(x), "foo");
-  ASSERT_EQ(std::string(y), "hi there");
-  ASSERT_TRUE(x < y);
-  ASSERT_TRUE(y > x);
-  ASSERT_TRUE(x != y);
-  ASSERT_TRUE(x <= y);
-  ASSERT_TRUE(y >= x);
-
-  x = "foo";
-  ASSERT_EQ(x, "foo");
-
-  // Test that going from inline rep to tree we don't leak memory.
-  std::vector<std::pair<absl::string_view, absl::string_view>>
-      test_string_pairs = {{"hi there", "foo"},
-                           {"loooooong coooooord", "short cord"},
-                           {"short cord", "loooooong coooooord"},
-                           {"loooooong coooooord1", "loooooong coooooord2"}};
-  for (std::pair<absl::string_view, absl::string_view> test_strings :
-       test_string_pairs) {
-    absl::Cord tmp(test_strings.first);
-    absl::Cord z(std::move(tmp));
-    ASSERT_EQ(std::string(z), test_strings.first);
-    tmp = test_strings.second;
-    z = std::move(tmp);
-    ASSERT_EQ(std::string(z), test_strings.second);
-  }
-  {
-    // Test that self-move assignment doesn't crash/leak.
-    // Do not write such code!
-    absl::Cord my_small_cord("foo");
-    absl::Cord my_big_cord("loooooong coooooord");
-    // Bypass clang's warning on self move-assignment.
-    absl::Cord* my_small_alias =
-        my_unique_true_boolean ? &my_small_cord : &my_big_cord;
-    absl::Cord* my_big_alias =
-        !my_unique_true_boolean ? &my_small_cord : &my_big_cord;
-
-    *my_small_alias = std::move(my_small_cord);
-    *my_big_alias = std::move(my_big_cord);
-    // my_small_cord and my_big_cord are in an unspecified but valid
-    // state, and will be correctly destroyed here.
-  }
-}
-
-TEST(Cord, StartsEndsWith) {
-  absl::Cord x(absl::string_view("abcde"));
-  absl::Cord empty("");
-
-  ASSERT_TRUE(x.StartsWith(absl::Cord("abcde")));
-  ASSERT_TRUE(x.StartsWith(absl::Cord("abc")));
-  ASSERT_TRUE(x.StartsWith(absl::Cord("")));
-  ASSERT_TRUE(empty.StartsWith(absl::Cord("")));
-  ASSERT_TRUE(x.EndsWith(absl::Cord("abcde")));
-  ASSERT_TRUE(x.EndsWith(absl::Cord("cde")));
-  ASSERT_TRUE(x.EndsWith(absl::Cord("")));
-  ASSERT_TRUE(empty.EndsWith(absl::Cord("")));
-
-  ASSERT_TRUE(!x.StartsWith(absl::Cord("xyz")));
-  ASSERT_TRUE(!empty.StartsWith(absl::Cord("xyz")));
-  ASSERT_TRUE(!x.EndsWith(absl::Cord("xyz")));
-  ASSERT_TRUE(!empty.EndsWith(absl::Cord("xyz")));
-
-  ASSERT_TRUE(x.StartsWith("abcde"));
-  ASSERT_TRUE(x.StartsWith("abc"));
-  ASSERT_TRUE(x.StartsWith(""));
-  ASSERT_TRUE(empty.StartsWith(""));
-  ASSERT_TRUE(x.EndsWith("abcde"));
-  ASSERT_TRUE(x.EndsWith("cde"));
-  ASSERT_TRUE(x.EndsWith(""));
-  ASSERT_TRUE(empty.EndsWith(""));
-
-  ASSERT_TRUE(!x.StartsWith("xyz"));
-  ASSERT_TRUE(!empty.StartsWith("xyz"));
-  ASSERT_TRUE(!x.EndsWith("xyz"));
-  ASSERT_TRUE(!empty.EndsWith("xyz"));
-}
-
-TEST(Cord, Subcord) {
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-  const std::string s = RandomLowercaseString(&rng, 1024);
-
-  absl::Cord a;
-  AppendWithFragments(s, &rng, &a);
-  ASSERT_EQ(s.size(), a.size());
-
-  // Check subcords of a, from a variety of interesting points.
-  std::set<size_t> positions;
-  for (int i = 0; i <= 32; ++i) {
-    positions.insert(i);
-    positions.insert(i * 32 - 1);
-    positions.insert(i * 32);
-    positions.insert(i * 32 + 1);
-    positions.insert(a.size() - i);
-  }
-  positions.insert(237);
-  positions.insert(732);
-  for (size_t pos : positions) {
-    if (pos > a.size()) continue;
-    for (size_t end_pos : positions) {
-      if (end_pos < pos || end_pos > a.size()) continue;
-      absl::Cord sa = a.Subcord(pos, end_pos - pos);
-      EXPECT_EQ(absl::string_view(s).substr(pos, end_pos - pos),
-                std::string(sa))
-          << a;
-    }
-  }
-
-  // Do the same thing for an inline cord.
-  const std::string sh = "short";
-  absl::Cord c(sh);
-  for (size_t pos = 0; pos <= sh.size(); ++pos) {
-    for (size_t n = 0; n <= sh.size() - pos; ++n) {
-      absl::Cord sc = c.Subcord(pos, n);
-      EXPECT_EQ(sh.substr(pos, n), std::string(sc)) << c;
-    }
-  }
-
-  // Check subcords of subcords.
-  absl::Cord sa = a.Subcord(0, a.size());
-  std::string ss = s.substr(0, s.size());
-  while (sa.size() > 1) {
-    sa = sa.Subcord(1, sa.size() - 2);
-    ss = ss.substr(1, ss.size() - 2);
-    EXPECT_EQ(ss, std::string(sa)) << a;
-    if (HasFailure()) break;  // halt cascade
-  }
-
-  // It is OK to ask for too much.
-  sa = a.Subcord(0, a.size() + 1);
-  EXPECT_EQ(s, std::string(sa));
-
-  // It is OK to ask for something beyond the end.
-  sa = a.Subcord(a.size() + 1, 0);
-  EXPECT_TRUE(sa.empty());
-  sa = a.Subcord(a.size() + 1, 1);
-  EXPECT_TRUE(sa.empty());
-}
-
-TEST(Cord, Swap) {
-  absl::string_view a("Dexter");
-  absl::string_view b("Mandark");
-  absl::Cord x(a);
-  absl::Cord y(b);
-  swap(x, y);
-  ASSERT_EQ(x, absl::Cord(b));
-  ASSERT_EQ(y, absl::Cord(a));
-  x.swap(y);
-  ASSERT_EQ(x, absl::Cord(a));
-  ASSERT_EQ(y, absl::Cord(b));
-}
-
-static void VerifyCopyToString(const absl::Cord& cord) {
-  std::string initially_empty;
-  absl::CopyCordToString(cord, &initially_empty);
-  EXPECT_EQ(initially_empty, cord);
-
-  constexpr size_t kInitialLength = 1024;
-  std::string has_initial_contents(kInitialLength, 'x');
-  const char* address_before_copy = has_initial_contents.data();
-  absl::CopyCordToString(cord, &has_initial_contents);
-  EXPECT_EQ(has_initial_contents, cord);
-
-  if (cord.size() <= kInitialLength) {
-    EXPECT_EQ(has_initial_contents.data(), address_before_copy)
-        << "CopyCordToString allocated new string storage; "
-           "has_initial_contents = \""
-        << has_initial_contents << "\"";
-  }
-}
-
-TEST(Cord, CopyToString) {
-  VerifyCopyToString(absl::Cord());
-  VerifyCopyToString(absl::Cord("small cord"));
-  VerifyCopyToString(
-      absl::MakeFragmentedCord({"fragmented ", "cord ", "to ", "test ",
-                                "copying ", "to ", "a ", "string."}));
-}
-
-TEST(TryFlat, Empty) {
-  absl::Cord c;
-  EXPECT_EQ(c.TryFlat(), "");
-}
-
-TEST(TryFlat, Flat) {
-  absl::Cord c("hello");
-  EXPECT_EQ(c.TryFlat(), "hello");
-}
-
-TEST(TryFlat, SubstrInlined) {
-  absl::Cord c("hello");
-  c.RemovePrefix(1);
-  EXPECT_EQ(c.TryFlat(), "ello");
-}
-
-TEST(TryFlat, SubstrFlat) {
-  absl::Cord c("longer than 15 bytes");
-  c.RemovePrefix(1);
-  EXPECT_EQ(c.TryFlat(), "onger than 15 bytes");
-}
-
-TEST(TryFlat, Concat) {
-  absl::Cord c = absl::MakeFragmentedCord({"hel", "lo"});
-  EXPECT_EQ(c.TryFlat(), absl::nullopt);
-}
-
-TEST(TryFlat, External) {
-  absl::Cord c = absl::MakeCordFromExternal("hell", [](absl::string_view) {});
-  EXPECT_EQ(c.TryFlat(), "hell");
-}
-
-TEST(TryFlat, SubstrExternal) {
-  absl::Cord c = absl::MakeCordFromExternal("hell", [](absl::string_view) {});
-  c.RemovePrefix(1);
-  EXPECT_EQ(c.TryFlat(), "ell");
-}
-
-TEST(TryFlat, SubstrConcat) {
-  absl::Cord c = absl::MakeFragmentedCord({"hello", " world"});
-  c.RemovePrefix(1);
-  EXPECT_EQ(c.TryFlat(), absl::nullopt);
-}
-
-static bool IsFlat(const absl::Cord& c) {
-  return c.chunk_begin() == c.chunk_end() || ++c.chunk_begin() == c.chunk_end();
-}
-
-static void VerifyFlatten(absl::Cord c) {
-  std::string old_contents(c);
-  absl::string_view old_flat;
-  bool already_flat_and_non_empty = IsFlat(c) && !c.empty();
-  if (already_flat_and_non_empty) {
-    old_flat = *c.chunk_begin();
-  }
-  absl::string_view new_flat = c.Flatten();
-
-  // Verify that the contents of the flattened Cord are correct.
-  EXPECT_EQ(new_flat, old_contents);
-  EXPECT_EQ(std::string(c), old_contents);
-
-  // If the Cord contained data and was already flat, verify that the data
-  // wasn't copied.
-  if (already_flat_and_non_empty) {
-    EXPECT_EQ(old_flat.data(), new_flat.data())
-        << "Allocated new memory even though the Cord was already flat.";
-  }
-
-  // Verify that the flattened Cord is in fact flat.
-  EXPECT_TRUE(IsFlat(c));
-}
-
-TEST(Cord, Flatten) {
-  VerifyFlatten(absl::Cord());
-  VerifyFlatten(absl::Cord("small cord"));
-  VerifyFlatten(absl::Cord("larger than small buffer optimization"));
-  VerifyFlatten(absl::MakeFragmentedCord({"small ", "fragmented ", "cord"}));
-
-  // Test with a cord that is longer than the largest flat buffer
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-  VerifyFlatten(absl::Cord(RandomLowercaseString(&rng, 8192)));
-}
-
-// Test data
-namespace {
-class TestData {
- private:
-  std::vector<std::string> data_;
-
-  // Return a std::string of the specified length.
-  static std::string MakeString(int length) {
-    std::string result;
-    char buf[30];
-    snprintf(buf, sizeof(buf), "(%d)", length);
-    while (result.size() < length) {
-      result += buf;
-    }
-    result.resize(length);
-    return result;
-  }
-
- public:
-  TestData() {
-    // short strings increasing in length by one
-    for (int i = 0; i < 30; i++) {
-      data_.push_back(MakeString(i));
-    }
-
-    // strings around half kMaxFlatLength
-    static const int kMaxFlatLength = 4096 - 9;
-    static const int kHalf = kMaxFlatLength / 2;
-
-    for (int i = -10; i <= +10; i++) {
-      data_.push_back(MakeString(kHalf + i));
-    }
-
-    for (int i = -10; i <= +10; i++) {
-      data_.push_back(MakeString(kMaxFlatLength + i));
-    }
-  }
-
-  size_t size() const { return data_.size(); }
-  const std::string& data(size_t i) const { return data_[i]; }
-};
-}  // namespace
-
-TEST(Cord, MultipleLengths) {
-  TestData d;
-  for (size_t i = 0; i < d.size(); i++) {
-    std::string a = d.data(i);
-
-    {  // Construct from Cord
-      absl::Cord tmp(a);
-      absl::Cord x(tmp);
-      EXPECT_EQ(a, std::string(x)) << "'" << a << "'";
-    }
-
-    {  // Construct from absl::string_view
-      absl::Cord x(a);
-      EXPECT_EQ(a, std::string(x)) << "'" << a << "'";
-    }
-
-    {  // Append cord to self
-      absl::Cord self(a);
-      self.Append(self);
-      EXPECT_EQ(a + a, std::string(self)) << "'" << a << "' + '" << a << "'";
-    }
-
-    {  // Prepend cord to self
-      absl::Cord self(a);
-      self.Prepend(self);
-      EXPECT_EQ(a + a, std::string(self)) << "'" << a << "' + '" << a << "'";
-    }
-
-    // Try to append/prepend others
-    for (size_t j = 0; j < d.size(); j++) {
-      std::string b = d.data(j);
-
-      {  // CopyFrom Cord
-        absl::Cord x(a);
-        absl::Cord y(b);
-        x = y;
-        EXPECT_EQ(b, std::string(x)) << "'" << a << "' + '" << b << "'";
-      }
-
-      {  // CopyFrom absl::string_view
-        absl::Cord x(a);
-        x = b;
-        EXPECT_EQ(b, std::string(x)) << "'" << a << "' + '" << b << "'";
-      }
-
-      {  // Cord::Append(Cord)
-        absl::Cord x(a);
-        absl::Cord y(b);
-        x.Append(y);
-        EXPECT_EQ(a + b, std::string(x)) << "'" << a << "' + '" << b << "'";
-      }
-
-      {  // Cord::Append(absl::string_view)
-        absl::Cord x(a);
-        x.Append(b);
-        EXPECT_EQ(a + b, std::string(x)) << "'" << a << "' + '" << b << "'";
-      }
-
-      {  // Cord::Prepend(Cord)
-        absl::Cord x(a);
-        absl::Cord y(b);
-        x.Prepend(y);
-        EXPECT_EQ(b + a, std::string(x)) << "'" << b << "' + '" << a << "'";
-      }
-
-      {  // Cord::Prepend(absl::string_view)
-        absl::Cord x(a);
-        x.Prepend(b);
-        EXPECT_EQ(b + a, std::string(x)) << "'" << b << "' + '" << a << "'";
-      }
-    }
-  }
-}
-
-namespace {
-
-TEST(Cord, RemoveSuffixWithExternalOrSubstring) {
-  absl::Cord cord = absl::MakeCordFromExternal(
-      "foo bar baz", [](absl::string_view s) { DoNothing(s, nullptr); });
-
-  EXPECT_EQ("foo bar baz", std::string(cord));
-
-  // This RemoveSuffix() will wrap the EXTERNAL node in a SUBSTRING node.
-  cord.RemoveSuffix(4);
-  EXPECT_EQ("foo bar", std::string(cord));
-
-  // This RemoveSuffix() will adjust the SUBSTRING node in-place.
-  cord.RemoveSuffix(4);
-  EXPECT_EQ("foo", std::string(cord));
-}
-
-TEST(Cord, RemoveSuffixMakesZeroLengthNode) {
-  absl::Cord c;
-  c.Append(absl::Cord(std::string(100, 'x')));
-  absl::Cord other_ref = c;  // Prevent inplace appends
-  c.Append(absl::Cord(std::string(200, 'y')));
-  c.RemoveSuffix(200);
-  EXPECT_EQ(std::string(100, 'x'), std::string(c));
-}
-
-}  // namespace
-
-// CordSpliceTest contributed by hendrie.
-namespace {
-
-// Create a cord with an external memory block filled with 'z'
-absl::Cord CordWithZedBlock(size_t size) {
-  char* data = new char[size];
-  if (size > 0) {
-    memset(data, 'z', size);
-  }
-  absl::Cord cord = absl::MakeCordFromExternal(
-      absl::string_view(data, size),
-      [](absl::string_view s) { delete[] s.data(); });
-  return cord;
-}
-
-// Establish that ZedBlock does what we think it does.
-TEST(CordSpliceTest, ZedBlock) {
-  absl::Cord blob = CordWithZedBlock(10);
-  EXPECT_EQ(10, blob.size());
-  std::string s;
-  absl::CopyCordToString(blob, &s);
-  EXPECT_EQ("zzzzzzzzzz", s);
-}
-
-TEST(CordSpliceTest, ZedBlock0) {
-  absl::Cord blob = CordWithZedBlock(0);
-  EXPECT_EQ(0, blob.size());
-  std::string s;
-  absl::CopyCordToString(blob, &s);
-  EXPECT_EQ("", s);
-}
-
-TEST(CordSpliceTest, ZedBlockSuffix1) {
-  absl::Cord blob = CordWithZedBlock(10);
-  EXPECT_EQ(10, blob.size());
-  absl::Cord suffix(blob);
-  suffix.RemovePrefix(9);
-  EXPECT_EQ(1, suffix.size());
-  std::string s;
-  absl::CopyCordToString(suffix, &s);
-  EXPECT_EQ("z", s);
-}
-
-// Remove all of a prefix block
-TEST(CordSpliceTest, ZedBlockSuffix0) {
-  absl::Cord blob = CordWithZedBlock(10);
-  EXPECT_EQ(10, blob.size());
-  absl::Cord suffix(blob);
-  suffix.RemovePrefix(10);
-  EXPECT_EQ(0, suffix.size());
-  std::string s;
-  absl::CopyCordToString(suffix, &s);
-  EXPECT_EQ("", s);
-}
-
-absl::Cord BigCord(size_t len, char v) {
-  std::string s(len, v);
-  return absl::Cord(s);
-}
-
-// Splice block into cord.
-absl::Cord SpliceCord(const absl::Cord& blob, int64_t offset,
-                      const absl::Cord& block) {
-  ABSL_RAW_CHECK(offset >= 0, "");
-  ABSL_RAW_CHECK(offset + block.size() <= blob.size(), "");
-  absl::Cord result(blob);
-  result.RemoveSuffix(blob.size() - offset);
-  result.Append(block);
-  absl::Cord suffix(blob);
-  suffix.RemovePrefix(offset + block.size());
-  result.Append(suffix);
-  ABSL_RAW_CHECK(blob.size() == result.size(), "");
-  return result;
-}
-
-// Taking an empty suffix of a block breaks appending.
-TEST(CordSpliceTest, RemoveEntireBlock1) {
-  absl::Cord zero = CordWithZedBlock(10);
-  absl::Cord suffix(zero);
-  suffix.RemovePrefix(10);
-  absl::Cord result;
-  result.Append(suffix);
-}
-
-TEST(CordSpliceTest, RemoveEntireBlock2) {
-  absl::Cord zero = CordWithZedBlock(10);
-  absl::Cord prefix(zero);
-  prefix.RemoveSuffix(10);
-  absl::Cord suffix(zero);
-  suffix.RemovePrefix(10);
-  absl::Cord result(prefix);
-  result.Append(suffix);
-}
-
-TEST(CordSpliceTest, RemoveEntireBlock3) {
-  absl::Cord blob = CordWithZedBlock(10);
-  absl::Cord block = BigCord(10, 'b');
-  blob = SpliceCord(blob, 0, block);
-}
-
-struct CordCompareTestCase {
-  template <typename LHS, typename RHS>
-  CordCompareTestCase(const LHS& lhs, const RHS& rhs)
-      : lhs_cord(lhs), rhs_cord(rhs) {}
-
-  absl::Cord lhs_cord;
-  absl::Cord rhs_cord;
-};
-
-const auto sign = [](int x) { return x == 0 ? 0 : (x > 0 ? 1 : -1); };
-
-void VerifyComparison(const CordCompareTestCase& test_case) {
-  std::string lhs_string(test_case.lhs_cord);
-  std::string rhs_string(test_case.rhs_cord);
-  int expected = sign(lhs_string.compare(rhs_string));
-  EXPECT_EQ(expected, test_case.lhs_cord.Compare(test_case.rhs_cord))
-      << "LHS=" << lhs_string << "; RHS=" << rhs_string;
-  EXPECT_EQ(expected, test_case.lhs_cord.Compare(rhs_string))
-      << "LHS=" << lhs_string << "; RHS=" << rhs_string;
-  EXPECT_EQ(-expected, test_case.rhs_cord.Compare(test_case.lhs_cord))
-      << "LHS=" << rhs_string << "; RHS=" << lhs_string;
-  EXPECT_EQ(-expected, test_case.rhs_cord.Compare(lhs_string))
-      << "LHS=" << rhs_string << "; RHS=" << lhs_string;
-}
-
-TEST(Cord, Compare) {
-  absl::Cord subcord("aaaaaBBBBBcccccDDDDD");
-  subcord = subcord.Subcord(3, 10);
-
-  absl::Cord tmp("aaaaaaaaaaaaaaaa");
-  tmp.Append("BBBBBBBBBBBBBBBB");
-  absl::Cord concat = absl::Cord("cccccccccccccccc");
-  concat.Append("DDDDDDDDDDDDDDDD");
-  concat.Prepend(tmp);
-
-  absl::Cord concat2("aaaaaaaaaaaaa");
-  concat2.Append("aaaBBBBBBBBBBBBBBBBccccc");
-  concat2.Append("cccccccccccDDDDDDDDDDDDDD");
-  concat2.Append("DD");
-
-  std::vector<CordCompareTestCase> test_cases = {{
-      // Inline cords
-      {"abcdef", "abcdef"},
-      {"abcdef", "abcdee"},
-      {"abcdef", "abcdeg"},
-      {"bbcdef", "abcdef"},
-      {"bbcdef", "abcdeg"},
-      {"abcdefa", "abcdef"},
-      {"abcdef", "abcdefa"},
-
-      // Small flat cords
-      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBcccccDDDDD"},
-      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBxccccDDDDD"},
-      {"aaaaaBBBBBcxcccDDDDD", "aaaaaBBBBBcccccDDDDD"},
-      {"aaaaaBBBBBxccccDDDDD", "aaaaaBBBBBcccccDDDDX"},
-      {"aaaaaBBBBBcccccDDDDDa", "aaaaaBBBBBcccccDDDDD"},
-      {"aaaaaBBBBBcccccDDDDD", "aaaaaBBBBBcccccDDDDDa"},
-
-      // Subcords
-      {subcord, subcord},
-      {subcord, "aaBBBBBccc"},
-      {subcord, "aaBBBBBccd"},
-      {subcord, "aaBBBBBccb"},
-      {subcord, "aaBBBBBxcb"},
-      {subcord, "aaBBBBBccca"},
-      {subcord, "aaBBBBBcc"},
-
-      // Concats
-      {concat, concat},
-      {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDDD"},
-      {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBcccccccccccccccxDDDDDDDDDDDDDDDD"},
-      {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBacccccccccccccccDDDDDDDDDDDDDDDD"},
-      {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDD"},
-      {concat,
-       "aaaaaaaaaaaaaaaaBBBBBBBBBBBBBBBBccccccccccccccccDDDDDDDDDDDDDDDDe"},
-
-      {concat, concat2},
-  }};
-
-  for (const auto& tc : test_cases) {
-    VerifyComparison(tc);
-  }
-}
-
-TEST(Cord, CompareAfterAssign) {
-  absl::Cord a("aaaaaa1111111");
-  absl::Cord b("aaaaaa2222222");
-  a = "cccccc";
-  b = "cccccc";
-  EXPECT_EQ(a, b);
-  EXPECT_FALSE(a < b);
-
-  a = "aaaa";
-  b = "bbbbb";
-  a = "";
-  b = "";
-  EXPECT_EQ(a, b);
-  EXPECT_FALSE(a < b);
-}
-
-// Test CompareTo() and ComparePrefix() against string and substring
-// comparison methods from basic_string.
-static void TestCompare(const absl::Cord& c, const absl::Cord& d,
-                        RandomEngine* rng) {
-  typedef std::basic_string<uint8_t> ustring;
-  ustring cs(reinterpret_cast<const uint8_t*>(std::string(c).data()), c.size());
-  ustring ds(reinterpret_cast<const uint8_t*>(std::string(d).data()), d.size());
-  // ustring comparison is ideal because we expect Cord comparisons to be
-  // based on unsigned byte comparisons regardless of whether char is signed.
-  int expected = sign(cs.compare(ds));
-  EXPECT_EQ(expected, sign(c.Compare(d))) << c << ", " << d;
-}
-
-TEST(Compare, ComparisonIsUnsigned) {
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-  std::uniform_int_distribution<uint32_t> uniform_uint8(0, 255);
-  char x = static_cast<char>(uniform_uint8(rng));
-  TestCompare(
-      absl::Cord(std::string(GetUniformRandomUpTo(&rng, 100), x)),
-      absl::Cord(std::string(GetUniformRandomUpTo(&rng, 100), x ^ 0x80)), &rng);
-}
-
-TEST(Compare, RandomComparisons) {
-  const int kIters = 5000;
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-
-  int n = GetUniformRandomUpTo(&rng, 5000);
-  absl::Cord a[] = {MakeExternalCord(n),
-                    absl::Cord("ant"),
-                    absl::Cord("elephant"),
-                    absl::Cord("giraffe"),
-                    absl::Cord(std::string(GetUniformRandomUpTo(&rng, 100),
-                                           GetUniformRandomUpTo(&rng, 100))),
-                    absl::Cord(""),
-                    absl::Cord("x"),
-                    absl::Cord("A"),
-                    absl::Cord("B"),
-                    absl::Cord("C")};
-  for (int i = 0; i < kIters; i++) {
-    absl::Cord c, d;
-    for (int j = 0; j < (i % 7) + 1; j++) {
-      c.Append(a[GetUniformRandomUpTo(&rng, ABSL_ARRAYSIZE(a))]);
-      d.Append(a[GetUniformRandomUpTo(&rng, ABSL_ARRAYSIZE(a))]);
-    }
-    std::bernoulli_distribution coin_flip(0.5);
-    TestCompare(coin_flip(rng) ? c : absl::Cord(std::string(c)),
-                coin_flip(rng) ? d : absl::Cord(std::string(d)), &rng);
-  }
-}
-
-template <typename T1, typename T2>
-void CompareOperators() {
-  const T1 a("a");
-  const T2 b("b");
-
-  EXPECT_TRUE(a == a);
-  // For pointer type (i.e. `const char*`), operator== compares the address
-  // instead of the string, so `a == const char*("a")` isn't necessarily true.
-  EXPECT_TRUE(std::is_pointer<T1>::value || a == T1("a"));
-  EXPECT_TRUE(std::is_pointer<T2>::value || a == T2("a"));
-  EXPECT_FALSE(a == b);
-
-  EXPECT_TRUE(a != b);
-  EXPECT_FALSE(a != a);
-
-  EXPECT_TRUE(a < b);
-  EXPECT_FALSE(b < a);
-
-  EXPECT_TRUE(b > a);
-  EXPECT_FALSE(a > b);
-
-  EXPECT_TRUE(a >= a);
-  EXPECT_TRUE(b >= a);
-  EXPECT_FALSE(a >= b);
-
-  EXPECT_TRUE(a <= a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_FALSE(b <= a);
-}
-
-TEST(ComparisonOperators, Cord_Cord) {
-  CompareOperators<absl::Cord, absl::Cord>();
-}
-
-TEST(ComparisonOperators, Cord_StringPiece) {
-  CompareOperators<absl::Cord, absl::string_view>();
-}
-
-TEST(ComparisonOperators, StringPiece_Cord) {
-  CompareOperators<absl::string_view, absl::Cord>();
-}
-
-TEST(ComparisonOperators, Cord_string) {
-  CompareOperators<absl::Cord, std::string>();
-}
-
-TEST(ComparisonOperators, string_Cord) {
-  CompareOperators<std::string, absl::Cord>();
-}
-
-TEST(ComparisonOperators, stdstring_Cord) {
-  CompareOperators<std::string, absl::Cord>();
-}
-
-TEST(ComparisonOperators, Cord_stdstring) {
-  CompareOperators<absl::Cord, std::string>();
-}
-
-TEST(ComparisonOperators, charstar_Cord) {
-  CompareOperators<const char*, absl::Cord>();
-}
-
-TEST(ComparisonOperators, Cord_charstar) {
-  CompareOperators<absl::Cord, const char*>();
-}
-
-TEST(ConstructFromExternal, ReleaserInvoked) {
-  // Empty external memory means the releaser should be called immediately.
-  {
-    bool invoked = false;
-    auto releaser = [&invoked](absl::string_view) { invoked = true; };
-    {
-      auto c = absl::MakeCordFromExternal("", releaser);
-      EXPECT_TRUE(invoked);
-    }
-  }
-
-  // If the size of the data is small enough, a future constructor
-  // implementation may copy the bytes and immediately invoke the releaser
-  // instead of creating an external node. We make a large dummy std::string to
-  // make this test independent of such an optimization.
-  std::string large_dummy(2048, 'c');
-  {
-    bool invoked = false;
-    auto releaser = [&invoked](absl::string_view) { invoked = true; };
-    {
-      auto c = absl::MakeCordFromExternal(large_dummy, releaser);
-      EXPECT_FALSE(invoked);
-    }
-    EXPECT_TRUE(invoked);
-  }
-
-  {
-    bool invoked = false;
-    auto releaser = [&invoked](absl::string_view) { invoked = true; };
-    {
-      absl::Cord copy;
-      {
-        auto c = absl::MakeCordFromExternal(large_dummy, releaser);
-        copy = c;
-        EXPECT_FALSE(invoked);
-      }
-      EXPECT_FALSE(invoked);
-    }
-    EXPECT_TRUE(invoked);
-  }
-}
-
-TEST(ConstructFromExternal, CompareContents) {
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-
-  for (int length = 1; length <= 2048; length *= 2) {
-    std::string data = RandomLowercaseString(&rng, length);
-    auto* external = new std::string(data);
-    auto cord =
-        absl::MakeCordFromExternal(*external, [external](absl::string_view sv) {
-          EXPECT_EQ(external->data(), sv.data());
-          EXPECT_EQ(external->size(), sv.size());
-          delete external;
-        });
-    EXPECT_EQ(data, cord);
-  }
-}
-
-TEST(ConstructFromExternal, LargeReleaser) {
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-  constexpr size_t kLength = 256;
-  std::string data = RandomLowercaseString(&rng, kLength);
-  std::array<char, kLength> data_array;
-  for (size_t i = 0; i < kLength; ++i) data_array[i] = data[i];
-  bool invoked = false;
-  auto releaser = [data_array, &invoked](absl::string_view data) {
-    EXPECT_EQ(data, absl::string_view(data_array.data(), data_array.size()));
-    invoked = true;
-  };
-  (void)absl::MakeCordFromExternal(data, releaser);
-  EXPECT_TRUE(invoked);
-}
-
-TEST(ConstructFromExternal, FunctionPointerReleaser) {
-  static absl::string_view data("hello world");
-  static bool invoked;
-  auto* releaser =
-      static_cast<void (*)(absl::string_view)>([](absl::string_view sv) {
-        EXPECT_EQ(data, sv);
-        invoked = true;
-      });
-  invoked = false;
-  (void)absl::MakeCordFromExternal(data, releaser);
-  EXPECT_TRUE(invoked);
-
-  invoked = false;
-  (void)absl::MakeCordFromExternal(data, *releaser);
-  EXPECT_TRUE(invoked);
-}
-
-TEST(ConstructFromExternal, MoveOnlyReleaser) {
-  struct Releaser {
-    explicit Releaser(bool* invoked) : invoked(invoked) {}
-    Releaser(Releaser&& other) noexcept : invoked(other.invoked) {}
-    void operator()(absl::string_view) const { *invoked = true; }
-
-    bool* invoked;
-  };
-
-  bool invoked = false;
-  (void)absl::MakeCordFromExternal("dummy", Releaser(&invoked));
-  EXPECT_TRUE(invoked);
-}
-
-TEST(ConstructFromExternal, NoArgLambda) {
-  bool invoked = false;
-  (void)absl::MakeCordFromExternal("dummy", [&invoked]() { invoked = true; });
-  EXPECT_TRUE(invoked);
-}
-
-TEST(ConstructFromExternal, StringViewArgLambda) {
-  bool invoked = false;
-  (void)absl::MakeCordFromExternal(
-      "dummy", [&invoked](absl::string_view) { invoked = true; });
-  EXPECT_TRUE(invoked);
-}
-
-TEST(ConstructFromExternal, NonTrivialReleaserDestructor) {
-  struct Releaser {
-    explicit Releaser(bool* destroyed) : destroyed(destroyed) {}
-    ~Releaser() { *destroyed = true; }
-    void operator()(absl::string_view) const {}
-
-    bool* destroyed;
-  };
-
-  bool destroyed = false;
-  Releaser releaser(&destroyed);
-  (void)absl::MakeCordFromExternal("dummy", releaser);
-  EXPECT_TRUE(destroyed);
-}
-
-TEST(ConstructFromExternal, ReferenceQualifierOverloads) {
-  struct Releaser {
-    void operator()(absl::string_view) & { *lvalue_invoked = true; }
-    void operator()(absl::string_view) && { *rvalue_invoked = true; }
-
-    bool* lvalue_invoked;
-    bool* rvalue_invoked;
-  };
-
-  bool lvalue_invoked = false;
-  bool rvalue_invoked = false;
-  Releaser releaser = {&lvalue_invoked, &rvalue_invoked};
-  (void)absl::MakeCordFromExternal("", releaser);
-  EXPECT_FALSE(lvalue_invoked);
-  EXPECT_TRUE(rvalue_invoked);
-  rvalue_invoked = false;
-
-  (void)absl::MakeCordFromExternal("dummy", releaser);
-  EXPECT_FALSE(lvalue_invoked);
-  EXPECT_TRUE(rvalue_invoked);
-  rvalue_invoked = false;
-
-  // NOLINTNEXTLINE: suppress clang-tidy std::move on trivially copyable type.
-  (void)absl::MakeCordFromExternal("dummy", std::move(releaser));
-  EXPECT_FALSE(lvalue_invoked);
-  EXPECT_TRUE(rvalue_invoked);
-}
-
-TEST(ExternalMemory, BasicUsage) {
-  static const char* strings[] = {"", "hello", "there"};
-  for (const char* str : strings) {
-    absl::Cord dst("(prefix)");
-    AddExternalMemory(str, &dst);
-    dst.Append("(suffix)");
-    EXPECT_EQ((std::string("(prefix)") + str + std::string("(suffix)")),
-              std::string(dst));
-  }
-}
-
-TEST(ExternalMemory, RemovePrefixSuffix) {
-  // Exhaustively try all sub-strings.
-  absl::Cord cord = MakeComposite();
-  std::string s = std::string(cord);
-  for (int offset = 0; offset <= s.size(); offset++) {
-    for (int length = 0; length <= s.size() - offset; length++) {
-      absl::Cord result(cord);
-      result.RemovePrefix(offset);
-      result.RemoveSuffix(result.size() - length);
-      EXPECT_EQ(s.substr(offset, length), std::string(result))
-          << offset << " " << length;
-    }
-  }
-}
-
-TEST(ExternalMemory, Get) {
-  absl::Cord cord("hello");
-  AddExternalMemory(" world!", &cord);
-  AddExternalMemory(" how are ", &cord);
-  cord.Append(" you?");
-  std::string s = std::string(cord);
-  for (int i = 0; i < s.size(); i++) {
-    EXPECT_EQ(s[i], cord[i]);
-  }
-}
-
-// CordMemoryUsage tests verify the correctness of the EstimatedMemoryUsage()
-// These tests take into account that the reported memory usage is approximate
-// and non-deterministic. For all tests, We verify that the reported memory
-// usage is larger than `size()`, and less than `size() * 1.5` as a cord should
-// never reserve more 'extra' capacity than half of its size as it grows.
-// Additionally we have some whiteboxed expectations based on our knowledge of
-// the layout and size of empty and inlined cords, and flat nodes.
-
-TEST(CordMemoryUsage, Empty) {
-  EXPECT_EQ(sizeof(absl::Cord), absl::Cord().EstimatedMemoryUsage());
-}
-
-TEST(CordMemoryUsage, Embedded) {
-  absl::Cord a("hello");
-  EXPECT_EQ(a.EstimatedMemoryUsage(), sizeof(absl::Cord));
-}
-
-TEST(CordMemoryUsage, EmbeddedAppend) {
-  absl::Cord a("a");
-  absl::Cord b("bcd");
-  EXPECT_EQ(b.EstimatedMemoryUsage(), sizeof(absl::Cord));
-  a.Append(b);
-  EXPECT_EQ(a.EstimatedMemoryUsage(), sizeof(absl::Cord));
-}
-
-TEST(CordMemoryUsage, ExternalMemory) {
-  static const int kLength = 1000;
-  absl::Cord cord;
-  AddExternalMemory(std::string(kLength, 'x'), &cord);
-  EXPECT_GT(cord.EstimatedMemoryUsage(), kLength);
-  EXPECT_LE(cord.EstimatedMemoryUsage(), kLength * 1.5);
-}
-
-TEST(CordMemoryUsage, Flat) {
-  static const int kLength = 125;
-  absl::Cord a(std::string(kLength, 'a'));
-  EXPECT_GT(a.EstimatedMemoryUsage(), kLength);
-  EXPECT_LE(a.EstimatedMemoryUsage(), kLength * 1.5);
-}
-
-TEST(CordMemoryUsage, AppendFlat) {
-  using absl::strings_internal::CordTestAccess;
-  absl::Cord a(std::string(CordTestAccess::MaxFlatLength(), 'a'));
-  size_t length = a.EstimatedMemoryUsage();
-  a.Append(std::string(CordTestAccess::MaxFlatLength(), 'b'));
-  size_t delta = a.EstimatedMemoryUsage() - length;
-  EXPECT_GT(delta, CordTestAccess::MaxFlatLength());
-  EXPECT_LE(delta, CordTestAccess::MaxFlatLength() * 1.5);
-}
-
-// Regtest for a change that had to be rolled back because it expanded out
-// of the InlineRep too soon, which was observable through MemoryUsage().
-TEST(CordMemoryUsage, InlineRep) {
-  constexpr size_t kMaxInline = 15;  // Cord::InlineRep::N
-  const std::string small_string(kMaxInline, 'x');
-  absl::Cord c1(small_string);
-
-  absl::Cord c2;
-  c2.Append(small_string);
-  EXPECT_EQ(c1, c2);
-  EXPECT_EQ(c1.EstimatedMemoryUsage(), c2.EstimatedMemoryUsage());
-}
-
-}  // namespace
-
-// Regtest for 7510292 (fix a bug introduced by 7465150)
-TEST(Cord, Concat_Append) {
-  // Create a rep of type CONCAT
-  absl::Cord s1("foobarbarbarbarbar");
-  s1.Append("abcdefgabcdefgabcdefgabcdefgabcdefgabcdefgabcdefg");
-  size_t size = s1.size();
-
-  // Create a copy of s1 and append to it.
-  absl::Cord s2 = s1;
-  s2.Append("x");
-
-  // 7465150 modifies s1 when it shouldn't.
-  EXPECT_EQ(s1.size(), size);
-  EXPECT_EQ(s2.size(), size + 1);
-}
-
-TEST(MakeFragmentedCord, MakeFragmentedCordFromInitializerList) {
-  absl::Cord fragmented =
-      absl::MakeFragmentedCord({"A ", "fragmented ", "Cord"});
-
-  EXPECT_EQ("A fragmented Cord", fragmented);
-
-  auto chunk_it = fragmented.chunk_begin();
-
-  ASSERT_TRUE(chunk_it != fragmented.chunk_end());
-  EXPECT_EQ("A ", *chunk_it);
-
-  ASSERT_TRUE(++chunk_it != fragmented.chunk_end());
-  EXPECT_EQ("fragmented ", *chunk_it);
-
-  ASSERT_TRUE(++chunk_it != fragmented.chunk_end());
-  EXPECT_EQ("Cord", *chunk_it);
-
-  ASSERT_TRUE(++chunk_it == fragmented.chunk_end());
-}
-
-TEST(MakeFragmentedCord, MakeFragmentedCordFromVector) {
-  std::vector<absl::string_view> chunks = {"A ", "fragmented ", "Cord"};
-  absl::Cord fragmented = absl::MakeFragmentedCord(chunks);
-
-  EXPECT_EQ("A fragmented Cord", fragmented);
-
-  auto chunk_it = fragmented.chunk_begin();
-
-  ASSERT_TRUE(chunk_it != fragmented.chunk_end());
-  EXPECT_EQ("A ", *chunk_it);
-
-  ASSERT_TRUE(++chunk_it != fragmented.chunk_end());
-  EXPECT_EQ("fragmented ", *chunk_it);
-
-  ASSERT_TRUE(++chunk_it != fragmented.chunk_end());
-  EXPECT_EQ("Cord", *chunk_it);
-
-  ASSERT_TRUE(++chunk_it == fragmented.chunk_end());
-}
-
-TEST(CordChunkIterator, Traits) {
-  static_assert(std::is_copy_constructible<absl::Cord::ChunkIterator>::value,
-                "");
-  static_assert(std::is_copy_assignable<absl::Cord::ChunkIterator>::value, "");
-
-  // Move semantics to satisfy swappable via std::swap
-  static_assert(std::is_move_constructible<absl::Cord::ChunkIterator>::value,
-                "");
-  static_assert(std::is_move_assignable<absl::Cord::ChunkIterator>::value, "");
-
-  static_assert(
-      std::is_same<
-          std::iterator_traits<absl::Cord::ChunkIterator>::iterator_category,
-          std::input_iterator_tag>::value,
-      "");
-  static_assert(
-      std::is_same<std::iterator_traits<absl::Cord::ChunkIterator>::value_type,
-                   absl::string_view>::value,
-      "");
-  static_assert(
-      std::is_same<
-          std::iterator_traits<absl::Cord::ChunkIterator>::difference_type,
-          ptrdiff_t>::value,
-      "");
-  static_assert(
-      std::is_same<std::iterator_traits<absl::Cord::ChunkIterator>::pointer,
-                   const absl::string_view*>::value,
-      "");
-  static_assert(
-      std::is_same<std::iterator_traits<absl::Cord::ChunkIterator>::reference,
-                   absl::string_view>::value,
-      "");
-}
-
-static void VerifyChunkIterator(const absl::Cord& cord,
-                                size_t expected_chunks) {
-  EXPECT_EQ(cord.chunk_begin() == cord.chunk_end(), cord.empty()) << cord;
-  EXPECT_EQ(cord.chunk_begin() != cord.chunk_end(), !cord.empty());
-
-  absl::Cord::ChunkRange range = cord.Chunks();
-  EXPECT_EQ(range.begin() == range.end(), cord.empty());
-  EXPECT_EQ(range.begin() != range.end(), !cord.empty());
-
-  std::string content(cord);
-  size_t pos = 0;
-  auto pre_iter = cord.chunk_begin(), post_iter = cord.chunk_begin();
-  size_t n_chunks = 0;
-  while (pre_iter != cord.chunk_end() && post_iter != cord.chunk_end()) {
-    EXPECT_FALSE(pre_iter == cord.chunk_end());   // NOLINT: explicitly test ==
-    EXPECT_FALSE(post_iter == cord.chunk_end());  // NOLINT
-
-    EXPECT_EQ(pre_iter, post_iter);
-    EXPECT_EQ(*pre_iter, *post_iter);
-
-    EXPECT_EQ(pre_iter->data(), (*pre_iter).data());
-    EXPECT_EQ(pre_iter->size(), (*pre_iter).size());
-
-    absl::string_view chunk = *pre_iter;
-    EXPECT_FALSE(chunk.empty());
-    EXPECT_LE(pos + chunk.size(), content.size());
-    EXPECT_EQ(absl::string_view(content.c_str() + pos, chunk.size()), chunk);
-
-    int n_equal_iterators = 0;
-    for (absl::Cord::ChunkIterator it = range.begin(); it != range.end();
-         ++it) {
-      n_equal_iterators += static_cast<int>(it == pre_iter);
-    }
-    EXPECT_EQ(n_equal_iterators, 1);
-
-    ++pre_iter;
-    EXPECT_EQ(*post_iter++, chunk);
-
-    pos += chunk.size();
-    ++n_chunks;
-  }
-  EXPECT_EQ(expected_chunks, n_chunks);
-  EXPECT_EQ(pos, content.size());
-  EXPECT_TRUE(pre_iter == cord.chunk_end());   // NOLINT: explicitly test ==
-  EXPECT_TRUE(post_iter == cord.chunk_end());  // NOLINT
-}
-
-TEST(CordChunkIterator, Operations) {
-  absl::Cord empty_cord;
-  VerifyChunkIterator(empty_cord, 0);
-
-  absl::Cord small_buffer_cord("small cord");
-  VerifyChunkIterator(small_buffer_cord, 1);
-
-  absl::Cord flat_node_cord("larger than small buffer optimization");
-  VerifyChunkIterator(flat_node_cord, 1);
-
-  VerifyChunkIterator(
-      absl::MakeFragmentedCord({"a ", "small ", "fragmented ", "cord ", "for ",
-                                "testing ", "chunk ", "iterations."}),
-      8);
-
-  absl::Cord reused_nodes_cord(std::string(40, 'c'));
-  reused_nodes_cord.Prepend(absl::Cord(std::string(40, 'b')));
-  reused_nodes_cord.Prepend(absl::Cord(std::string(40, 'a')));
-  size_t expected_chunks = 3;
-  for (int i = 0; i < 8; ++i) {
-    reused_nodes_cord.Prepend(reused_nodes_cord);
-    expected_chunks *= 2;
-    VerifyChunkIterator(reused_nodes_cord, expected_chunks);
-  }
-
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-  absl::Cord flat_cord(RandomLowercaseString(&rng, 256));
-  absl::Cord subcords;
-  for (int i = 0; i < 128; ++i) subcords.Prepend(flat_cord.Subcord(i, 128));
-  VerifyChunkIterator(subcords, 128);
-}
-
-TEST(CordCharIterator, Traits) {
-  static_assert(std::is_copy_constructible<absl::Cord::CharIterator>::value,
-                "");
-  static_assert(std::is_copy_assignable<absl::Cord::CharIterator>::value, "");
-
-  // Move semantics to satisfy swappable via std::swap
-  static_assert(std::is_move_constructible<absl::Cord::CharIterator>::value,
-                "");
-  static_assert(std::is_move_assignable<absl::Cord::CharIterator>::value, "");
-
-  static_assert(
-      std::is_same<
-          std::iterator_traits<absl::Cord::CharIterator>::iterator_category,
-          std::input_iterator_tag>::value,
-      "");
-  static_assert(
-      std::is_same<std::iterator_traits<absl::Cord::CharIterator>::value_type,
-                   char>::value,
-      "");
-  static_assert(
-      std::is_same<
-          std::iterator_traits<absl::Cord::CharIterator>::difference_type,
-          ptrdiff_t>::value,
-      "");
-  static_assert(
-      std::is_same<std::iterator_traits<absl::Cord::CharIterator>::pointer,
-                   const char*>::value,
-      "");
-  static_assert(
-      std::is_same<std::iterator_traits<absl::Cord::CharIterator>::reference,
-                   const char&>::value,
-      "");
-}
-
-static void VerifyCharIterator(const absl::Cord& cord) {
-  EXPECT_EQ(cord.char_begin() == cord.char_end(), cord.empty());
-  EXPECT_EQ(cord.char_begin() != cord.char_end(), !cord.empty());
-
-  absl::Cord::CharRange range = cord.Chars();
-  EXPECT_EQ(range.begin() == range.end(), cord.empty());
-  EXPECT_EQ(range.begin() != range.end(), !cord.empty());
-
-  size_t i = 0;
-  absl::Cord::CharIterator pre_iter = cord.char_begin();
-  absl::Cord::CharIterator post_iter = cord.char_begin();
-  std::string content(cord);
-  while (pre_iter != cord.char_end() && post_iter != cord.char_end()) {
-    EXPECT_FALSE(pre_iter == cord.char_end());   // NOLINT: explicitly test ==
-    EXPECT_FALSE(post_iter == cord.char_end());  // NOLINT
-
-    EXPECT_LT(i, cord.size());
-    EXPECT_EQ(content[i], *pre_iter);
-
-    EXPECT_EQ(pre_iter, post_iter);
-    EXPECT_EQ(*pre_iter, *post_iter);
-    EXPECT_EQ(&*pre_iter, &*post_iter);
-
-    EXPECT_EQ(&*pre_iter, pre_iter.operator->());
-
-    const char* character_address = &*pre_iter;
-    absl::Cord::CharIterator copy = pre_iter;
-    ++copy;
-    EXPECT_EQ(character_address, &*pre_iter);
-
-    int n_equal_iterators = 0;
-    for (absl::Cord::CharIterator it = range.begin(); it != range.end(); ++it) {
-      n_equal_iterators += static_cast<int>(it == pre_iter);
-    }
-    EXPECT_EQ(n_equal_iterators, 1);
-
-    absl::Cord::CharIterator advance_iter = range.begin();
-    absl::Cord::Advance(&advance_iter, i);
-    EXPECT_EQ(pre_iter, advance_iter);
-
-    advance_iter = range.begin();
-    EXPECT_EQ(absl::Cord::AdvanceAndRead(&advance_iter, i), cord.Subcord(0, i));
-    EXPECT_EQ(pre_iter, advance_iter);
-
-    advance_iter = pre_iter;
-    absl::Cord::Advance(&advance_iter, cord.size() - i);
-    EXPECT_EQ(range.end(), advance_iter);
-
-    advance_iter = pre_iter;
-    EXPECT_EQ(absl::Cord::AdvanceAndRead(&advance_iter, cord.size() - i),
-              cord.Subcord(i, cord.size() - i));
-    EXPECT_EQ(range.end(), advance_iter);
-
-    ++i;
-    ++pre_iter;
-    post_iter++;
-  }
-  EXPECT_EQ(i, cord.size());
-  EXPECT_TRUE(pre_iter == cord.char_end());   // NOLINT: explicitly test ==
-  EXPECT_TRUE(post_iter == cord.char_end());  // NOLINT
-
-  absl::Cord::CharIterator zero_advanced_end = cord.char_end();
-  absl::Cord::Advance(&zero_advanced_end, 0);
-  EXPECT_EQ(zero_advanced_end, cord.char_end());
-
-  absl::Cord::CharIterator it = cord.char_begin();
-  for (absl::string_view chunk : cord.Chunks()) {
-    while (!chunk.empty()) {
-      EXPECT_EQ(absl::Cord::ChunkRemaining(it), chunk);
-      chunk.remove_prefix(1);
-      ++it;
-    }
-  }
-}
-
-TEST(CordCharIterator, Operations) {
-  absl::Cord empty_cord;
-  VerifyCharIterator(empty_cord);
-
-  absl::Cord small_buffer_cord("small cord");
-  VerifyCharIterator(small_buffer_cord);
-
-  absl::Cord flat_node_cord("larger than small buffer optimization");
-  VerifyCharIterator(flat_node_cord);
-
-  VerifyCharIterator(
-      absl::MakeFragmentedCord({"a ", "small ", "fragmented ", "cord ", "for ",
-                                "testing ", "character ", "iteration."}));
-
-  absl::Cord reused_nodes_cord("ghi");
-  reused_nodes_cord.Prepend(absl::Cord("def"));
-  reused_nodes_cord.Prepend(absl::Cord("abc"));
-  for (int i = 0; i < 4; ++i) {
-    reused_nodes_cord.Prepend(reused_nodes_cord);
-    VerifyCharIterator(reused_nodes_cord);
-  }
-
-  RandomEngine rng(testing::GTEST_FLAG(random_seed));
-  absl::Cord flat_cord(RandomLowercaseString(&rng, 256));
-  absl::Cord subcords;
-  for (int i = 0; i < 4; ++i) subcords.Prepend(flat_cord.Subcord(16 * i, 128));
-  VerifyCharIterator(subcords);
-}
-
-TEST(Cord, StreamingOutput) {
-  absl::Cord c =
-      absl::MakeFragmentedCord({"A ", "small ", "fragmented ", "Cord", "."});
-  std::stringstream output;
-  output << c;
-  EXPECT_EQ("A small fragmented Cord.", output.str());
-}
-
-TEST(Cord, ForEachChunk) {
-  for (int num_elements : {1, 10, 200}) {
-    SCOPED_TRACE(num_elements);
-    std::vector<std::string> cord_chunks;
-    for (int i = 0; i < num_elements; ++i) {
-      cord_chunks.push_back(absl::StrCat("[", i, "]"));
-    }
-    absl::Cord c = absl::MakeFragmentedCord(cord_chunks);
-
-    std::vector<std::string> iterated_chunks;
-    absl::CordTestPeer::ForEachChunk(c,
-                                     [&iterated_chunks](absl::string_view sv) {
-                                       iterated_chunks.emplace_back(sv);
-                                     });
-    EXPECT_EQ(iterated_chunks, cord_chunks);
-  }
-}
-
-TEST(Cord, SmallBufferAssignFromOwnData) {
-  constexpr size_t kMaxInline = 15;
-  std::string contents = "small buff cord";
-  EXPECT_EQ(contents.size(), kMaxInline);
-  for (size_t pos = 0; pos < contents.size(); ++pos) {
-    for (size_t count = contents.size() - pos; count > 0; --count) {
-      absl::Cord c(contents);
-      absl::string_view flat = c.Flatten();
-      c = flat.substr(pos, count);
-      EXPECT_EQ(c, contents.substr(pos, count))
-          << "pos = " << pos << "; count = " << count;
-    }
-  }
-}
-
-TEST(Cord, Format) {
-  absl::Cord c;
-  absl::Format(&c, "There were %04d little %s.", 3, "pigs");
-  EXPECT_EQ(c, "There were 0003 little pigs.");
-  absl::Format(&c, "And %-3llx bad wolf!", 1);
-  EXPECT_EQ(c, "There were 0003 little pigs.And 1   bad wolf!");
-}
-
-TEST(CordDeathTest, Hardening) {
-  absl::Cord cord("hello");
-  // These statement should abort the program in all builds modes.
-  EXPECT_DEATH_IF_SUPPORTED(cord.RemovePrefix(6), "");
-  EXPECT_DEATH_IF_SUPPORTED(cord.RemoveSuffix(6), "");
-
-  bool test_hardening = false;
-  ABSL_HARDENING_ASSERT([&]() {
-    // This only runs when ABSL_HARDENING_ASSERT is active.
-    test_hardening = true;
-    return true;
-  }());
-  if (!test_hardening) return;
-
-  EXPECT_DEATH_IF_SUPPORTED(cord[5], "");
-  EXPECT_DEATH_IF_SUPPORTED(*cord.chunk_end(), "");
-  EXPECT_DEATH_IF_SUPPORTED(static_cast<void>(cord.chunk_end()->empty()), "");
-  EXPECT_DEATH_IF_SUPPORTED(++cord.chunk_end(), "");
-}
-
-class AfterExitCordTester {
- public:
-  bool Set(absl::Cord* cord, absl::string_view expected) {
-    cord_ = cord;
-    expected_ = expected;
-    return true;
-  }
-
-  ~AfterExitCordTester() {
-    EXPECT_EQ(*cord_, expected_);
-  }
- private:
-  absl::Cord* cord_;
-  absl::string_view expected_;
-};
-
-template <typename Str>
-void TestConstinitConstructor(Str) {
-  const auto expected = Str::value;
-  // Defined before `cord` to be destroyed after it.
-  static AfterExitCordTester exit_tester;  // NOLINT
-  ABSL_CONST_INIT static absl::Cord cord(Str{});  // NOLINT
-  static bool init_exit_tester = exit_tester.Set(&cord, expected);
-  (void)init_exit_tester;
-
-  EXPECT_EQ(cord, expected);
-  // Copy the object and test the copy, and the original.
-  {
-    absl::Cord copy = cord;
-    EXPECT_EQ(copy, expected);
-  }
-  // The original still works
-  EXPECT_EQ(cord, expected);
-
-  // Try making adding more structure to the tree.
-  {
-    absl::Cord copy = cord;
-    std::string expected_copy(expected);
-    for (int i = 0; i < 10; ++i) {
-      copy.Append(cord);
-      absl::StrAppend(&expected_copy, expected);
-      EXPECT_EQ(copy, expected_copy);
-    }
-  }
-
-  // Make sure we are using the right branch during constant evaluation.
-  EXPECT_EQ(absl::CordTestPeer::IsTree(cord), cord.size() >= 16);
-
-  for (int i = 0; i < 10; ++i) {
-    // Make a few more Cords from the same global rep.
-    // This tests what happens when the refcount for it gets below 1.
-    EXPECT_EQ(expected, absl::Cord(Str{}));
-  }
-}
-
-constexpr int SimpleStrlen(const char* p) {
-  return *p ? 1 + SimpleStrlen(p + 1) : 0;
-}
-
-struct ShortView {
-  constexpr absl::string_view operator()() const {
-    return absl::string_view("SSO string", SimpleStrlen("SSO string"));
-  }
-};
-
-struct LongView {
-  constexpr absl::string_view operator()() const {
-    return absl::string_view("String that does not fit SSO.",
-                             SimpleStrlen("String that does not fit SSO."));
-  }
-};
-
-
-TEST(Cord, ConstinitConstructor) {
-  TestConstinitConstructor(
-      absl::strings_internal::MakeStringConstant(ShortView{}));
-  TestConstinitConstructor(
-      absl::strings_internal::MakeStringConstant(LongView{}));
-}
diff --git a/third_party/abseil/absl/strings/cord_test_helpers.h b/third_party/abseil/absl/strings/cord_test_helpers.h
deleted file mode 100644
index f1036e3..0000000
--- a/third_party/abseil/absl/strings/cord_test_helpers.h
+++ /dev/null
@@ -1,60 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_STRINGS_CORD_TEST_HELPERS_H_
-#define ABSL_STRINGS_CORD_TEST_HELPERS_H_
-
-#include "absl/strings/cord.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Creates a multi-segment Cord from an iterable container of strings.  The
-// resulting Cord is guaranteed to have one segment for every string in the
-// container.  This allows code to be unit tested with multi-segment Cord
-// inputs.
-//
-// Example:
-//
-//   absl::Cord c = absl::MakeFragmentedCord({"A ", "fragmented ", "Cord"});
-//   EXPECT_FALSE(c.GetFlat(&unused));
-//
-// The mechanism by which this Cord is created is an implementation detail.  Any
-// implementation that produces a multi-segment Cord may produce a flat Cord in
-// the future as new optimizations are added to the Cord class.
-// MakeFragmentedCord will, however, always be updated to return a multi-segment
-// Cord.
-template <typename Container>
-Cord MakeFragmentedCord(const Container& c) {
-  Cord result;
-  for (const auto& s : c) {
-    auto* external = new std::string(s);
-    Cord tmp = absl::MakeCordFromExternal(
-        *external, [external](absl::string_view) { delete external; });
-    tmp.Prepend(result);
-    result = tmp;
-  }
-  return result;
-}
-
-inline Cord MakeFragmentedCord(std::initializer_list<absl::string_view> list) {
-  return MakeFragmentedCord<std::initializer_list<absl::string_view>>(list);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_CORD_TEST_HELPERS_H_
diff --git a/third_party/abseil/absl/strings/escaping.cc b/third_party/abseil/absl/strings/escaping.cc
deleted file mode 100644
index 18b20b8..0000000
--- a/third_party/abseil/absl/strings/escaping.cc
+++ /dev/null
@@ -1,949 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/escaping.h"
-
-#include <algorithm>
-#include <cassert>
-#include <cstdint>
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <string>
-
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/strings/internal/char_map.h"
-#include "absl/strings/internal/escaping.h"
-#include "absl/strings/internal/resize_uninitialized.h"
-#include "absl/strings/internal/utf8.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_join.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-// These are used for the leave_nulls_escaped argument to CUnescapeInternal().
-constexpr bool kUnescapeNulls = false;
-
-inline bool is_octal_digit(char c) { return ('0' <= c) && (c <= '7'); }
-
-inline int hex_digit_to_int(char c) {
-  static_assert('0' == 0x30 && 'A' == 0x41 && 'a' == 0x61,
-                "Character set must be ASCII.");
-  assert(absl::ascii_isxdigit(c));
-  int x = static_cast<unsigned char>(c);
-  if (x > '9') {
-    x += 9;
-  }
-  return x & 0xf;
-}
-
-inline bool IsSurrogate(char32_t c, absl::string_view src, std::string* error) {
-  if (c >= 0xD800 && c <= 0xDFFF) {
-    if (error) {
-      *error = absl::StrCat("invalid surrogate character (0xD800-DFFF): \\",
-                            src);
-    }
-    return true;
-  }
-  return false;
-}
-
-// ----------------------------------------------------------------------
-// CUnescapeInternal()
-//    Implements both CUnescape() and CUnescapeForNullTerminatedString().
-//
-//    Unescapes C escape sequences and is the reverse of CEscape().
-//
-//    If 'source' is valid, stores the unescaped string and its size in
-//    'dest' and 'dest_len' respectively, and returns true. Otherwise
-//    returns false and optionally stores the error description in
-//    'error'. Set 'error' to nullptr to disable error reporting.
-//
-//    'dest' should point to a buffer that is at least as big as 'source'.
-//    'source' and 'dest' may be the same.
-//
-//     NOTE: any changes to this function must also be reflected in the older
-//     UnescapeCEscapeSequences().
-// ----------------------------------------------------------------------
-bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
-                       char* dest, ptrdiff_t* dest_len, std::string* error) {
-  char* d = dest;
-  const char* p = source.data();
-  const char* end = p + source.size();
-  const char* last_byte = end - 1;
-
-  // Small optimization for case where source = dest and there's no escaping
-  while (p == d && p < end && *p != '\\') p++, d++;
-
-  while (p < end) {
-    if (*p != '\\') {
-      *d++ = *p++;
-    } else {
-      if (++p > last_byte) {  // skip past the '\\'
-        if (error) *error = "String cannot end with \\";
-        return false;
-      }
-      switch (*p) {
-        case 'a':  *d++ = '\a';  break;
-        case 'b':  *d++ = '\b';  break;
-        case 'f':  *d++ = '\f';  break;
-        case 'n':  *d++ = '\n';  break;
-        case 'r':  *d++ = '\r';  break;
-        case 't':  *d++ = '\t';  break;
-        case 'v':  *d++ = '\v';  break;
-        case '\\': *d++ = '\\';  break;
-        case '?':  *d++ = '\?';  break;    // \?  Who knew?
-        case '\'': *d++ = '\'';  break;
-        case '"':  *d++ = '\"';  break;
-        case '0':
-        case '1':
-        case '2':
-        case '3':
-        case '4':
-        case '5':
-        case '6':
-        case '7': {
-          // octal digit: 1 to 3 digits
-          const char* octal_start = p;
-          unsigned int ch = *p - '0';
-          if (p < last_byte && is_octal_digit(p[1])) ch = ch * 8 + *++p - '0';
-          if (p < last_byte && is_octal_digit(p[1]))
-            ch = ch * 8 + *++p - '0';      // now points at last digit
-          if (ch > 0xff) {
-            if (error) {
-              *error = "Value of \\" +
-                       std::string(octal_start, p + 1 - octal_start) +
-                       " exceeds 0xff";
-            }
-            return false;
-          }
-          if ((ch == 0) && leave_nulls_escaped) {
-            // Copy the escape sequence for the null character
-            const ptrdiff_t octal_size = p + 1 - octal_start;
-            *d++ = '\\';
-            memmove(d, octal_start, octal_size);
-            d += octal_size;
-            break;
-          }
-          *d++ = ch;
-          break;
-        }
-        case 'x':
-        case 'X': {
-          if (p >= last_byte) {
-            if (error) *error = "String cannot end with \\x";
-            return false;
-          } else if (!absl::ascii_isxdigit(p[1])) {
-            if (error) *error = "\\x cannot be followed by a non-hex digit";
-            return false;
-          }
-          unsigned int ch = 0;
-          const char* hex_start = p;
-          while (p < last_byte && absl::ascii_isxdigit(p[1]))
-            // Arbitrarily many hex digits
-            ch = (ch << 4) + hex_digit_to_int(*++p);
-          if (ch > 0xFF) {
-            if (error) {
-              *error = "Value of \\" +
-                       std::string(hex_start, p + 1 - hex_start) +
-                       " exceeds 0xff";
-            }
-            return false;
-          }
-          if ((ch == 0) && leave_nulls_escaped) {
-            // Copy the escape sequence for the null character
-            const ptrdiff_t hex_size = p + 1 - hex_start;
-            *d++ = '\\';
-            memmove(d, hex_start, hex_size);
-            d += hex_size;
-            break;
-          }
-          *d++ = ch;
-          break;
-        }
-        case 'u': {
-          // \uhhhh => convert 4 hex digits to UTF-8
-          char32_t rune = 0;
-          const char* hex_start = p;
-          if (p + 4 >= end) {
-            if (error) {
-              *error = "\\u must be followed by 4 hex digits: \\" +
-                       std::string(hex_start, p + 1 - hex_start);
-            }
-            return false;
-          }
-          for (int i = 0; i < 4; ++i) {
-            // Look one char ahead.
-            if (absl::ascii_isxdigit(p[1])) {
-              rune = (rune << 4) + hex_digit_to_int(*++p);  // Advance p.
-            } else {
-              if (error) {
-                *error = "\\u must be followed by 4 hex digits: \\" +
-                         std::string(hex_start, p + 1 - hex_start);
-              }
-              return false;
-            }
-          }
-          if ((rune == 0) && leave_nulls_escaped) {
-            // Copy the escape sequence for the null character
-            *d++ = '\\';
-            memmove(d, hex_start, 5);  // u0000
-            d += 5;
-            break;
-          }
-          if (IsSurrogate(rune, absl::string_view(hex_start, 5), error)) {
-            return false;
-          }
-          d += strings_internal::EncodeUTF8Char(d, rune);
-          break;
-        }
-        case 'U': {
-          // \Uhhhhhhhh => convert 8 hex digits to UTF-8
-          char32_t rune = 0;
-          const char* hex_start = p;
-          if (p + 8 >= end) {
-            if (error) {
-              *error = "\\U must be followed by 8 hex digits: \\" +
-                       std::string(hex_start, p + 1 - hex_start);
-            }
-            return false;
-          }
-          for (int i = 0; i < 8; ++i) {
-            // Look one char ahead.
-            if (absl::ascii_isxdigit(p[1])) {
-              // Don't change rune until we're sure this
-              // is within the Unicode limit, but do advance p.
-              uint32_t newrune = (rune << 4) + hex_digit_to_int(*++p);
-              if (newrune > 0x10FFFF) {
-                if (error) {
-                  *error = "Value of \\" +
-                           std::string(hex_start, p + 1 - hex_start) +
-                           " exceeds Unicode limit (0x10FFFF)";
-                }
-                return false;
-              } else {
-                rune = newrune;
-              }
-            } else {
-              if (error) {
-                *error = "\\U must be followed by 8 hex digits: \\" +
-                         std::string(hex_start, p + 1 - hex_start);
-              }
-              return false;
-            }
-          }
-          if ((rune == 0) && leave_nulls_escaped) {
-            // Copy the escape sequence for the null character
-            *d++ = '\\';
-            memmove(d, hex_start, 9);  // U00000000
-            d += 9;
-            break;
-          }
-          if (IsSurrogate(rune, absl::string_view(hex_start, 9), error)) {
-            return false;
-          }
-          d += strings_internal::EncodeUTF8Char(d, rune);
-          break;
-        }
-        default: {
-          if (error) *error = std::string("Unknown escape sequence: \\") + *p;
-          return false;
-        }
-      }
-      p++;                                 // read past letter we escaped
-    }
-  }
-  *dest_len = d - dest;
-  return true;
-}
-
-// ----------------------------------------------------------------------
-// CUnescapeInternal()
-//
-//    Same as above but uses a std::string for output. 'source' and 'dest'
-//    may be the same.
-// ----------------------------------------------------------------------
-bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
-                       std::string* dest, std::string* error) {
-  strings_internal::STLStringResizeUninitialized(dest, source.size());
-
-  ptrdiff_t dest_size;
-  if (!CUnescapeInternal(source,
-                         leave_nulls_escaped,
-                         &(*dest)[0],
-                         &dest_size,
-                         error)) {
-    return false;
-  }
-  dest->erase(dest_size);
-  return true;
-}
-
-// ----------------------------------------------------------------------
-// CEscape()
-// CHexEscape()
-// Utf8SafeCEscape()
-// Utf8SafeCHexEscape()
-//    Escapes 'src' using C-style escape sequences.  This is useful for
-//    preparing query flags.  The 'Hex' version uses hexadecimal rather than
-//    octal sequences.  The 'Utf8Safe' version does not touch UTF-8 bytes.
-//
-//    Escaped chars: \n, \r, \t, ", ', \, and !absl::ascii_isprint().
-// ----------------------------------------------------------------------
-std::string CEscapeInternal(absl::string_view src, bool use_hex,
-                            bool utf8_safe) {
-  std::string dest;
-  bool last_hex_escape = false;  // true if last output char was \xNN.
-
-  for (unsigned char c : src) {
-    bool is_hex_escape = false;
-    switch (c) {
-      case '\n': dest.append("\\" "n"); break;
-      case '\r': dest.append("\\" "r"); break;
-      case '\t': dest.append("\\" "t"); break;
-      case '\"': dest.append("\\" "\""); break;
-      case '\'': dest.append("\\" "'"); break;
-      case '\\': dest.append("\\" "\\"); break;
-      default:
-        // Note that if we emit \xNN and the src character after that is a hex
-        // digit then that digit must be escaped too to prevent it being
-        // interpreted as part of the character code by C.
-        if ((!utf8_safe || c < 0x80) &&
-            (!absl::ascii_isprint(c) ||
-             (last_hex_escape && absl::ascii_isxdigit(c)))) {
-          if (use_hex) {
-            dest.append("\\" "x");
-            dest.push_back(numbers_internal::kHexChar[c / 16]);
-            dest.push_back(numbers_internal::kHexChar[c % 16]);
-            is_hex_escape = true;
-          } else {
-            dest.append("\\");
-            dest.push_back(numbers_internal::kHexChar[c / 64]);
-            dest.push_back(numbers_internal::kHexChar[(c % 64) / 8]);
-            dest.push_back(numbers_internal::kHexChar[c % 8]);
-          }
-        } else {
-          dest.push_back(c);
-          break;
-        }
-    }
-    last_hex_escape = is_hex_escape;
-  }
-
-  return dest;
-}
-
-/* clang-format off */
-constexpr char c_escaped_len[256] = {
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 4, 4, 2, 4, 4,  // \t, \n, \r
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1,  // ", '
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // '0'..'9'
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // 'A'..'O'
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1,  // 'P'..'Z', '\'
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  // 'a'..'o'
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4,  // 'p'..'z', DEL
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-};
-/* clang-format on */
-
-// Calculates the length of the C-style escaped version of 'src'.
-// Assumes that non-printable characters are escaped using octal sequences, and
-// that UTF-8 bytes are not handled specially.
-inline size_t CEscapedLength(absl::string_view src) {
-  size_t escaped_len = 0;
-  for (unsigned char c : src) escaped_len += c_escaped_len[c];
-  return escaped_len;
-}
-
-void CEscapeAndAppendInternal(absl::string_view src, std::string* dest) {
-  size_t escaped_len = CEscapedLength(src);
-  if (escaped_len == src.size()) {
-    dest->append(src.data(), src.size());
-    return;
-  }
-
-  size_t cur_dest_len = dest->size();
-  strings_internal::STLStringResizeUninitialized(dest,
-                                                 cur_dest_len + escaped_len);
-  char* append_ptr = &(*dest)[cur_dest_len];
-
-  for (unsigned char c : src) {
-    int char_len = c_escaped_len[c];
-    if (char_len == 1) {
-      *append_ptr++ = c;
-    } else if (char_len == 2) {
-      switch (c) {
-        case '\n':
-          *append_ptr++ = '\\';
-          *append_ptr++ = 'n';
-          break;
-        case '\r':
-          *append_ptr++ = '\\';
-          *append_ptr++ = 'r';
-          break;
-        case '\t':
-          *append_ptr++ = '\\';
-          *append_ptr++ = 't';
-          break;
-        case '\"':
-          *append_ptr++ = '\\';
-          *append_ptr++ = '\"';
-          break;
-        case '\'':
-          *append_ptr++ = '\\';
-          *append_ptr++ = '\'';
-          break;
-        case '\\':
-          *append_ptr++ = '\\';
-          *append_ptr++ = '\\';
-          break;
-      }
-    } else {
-      *append_ptr++ = '\\';
-      *append_ptr++ = '0' + c / 64;
-      *append_ptr++ = '0' + (c % 64) / 8;
-      *append_ptr++ = '0' + c % 8;
-    }
-  }
-}
-
-bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
-                            size_t szdest, const signed char* unbase64,
-                            size_t* len) {
-  static const char kPad64Equals = '=';
-  static const char kPad64Dot = '.';
-
-  size_t destidx = 0;
-  int decode = 0;
-  int state = 0;
-  unsigned int ch = 0;
-  unsigned int temp = 0;
-
-  // If "char" is signed by default, using *src as an array index results in
-  // accessing negative array elements. Treat the input as a pointer to
-  // unsigned char to avoid this.
-  const unsigned char* src = reinterpret_cast<const unsigned char*>(src_param);
-
-  // The GET_INPUT macro gets the next input character, skipping
-  // over any whitespace, and stopping when we reach the end of the
-  // string or when we read any non-data character.  The arguments are
-  // an arbitrary identifier (used as a label for goto) and the number
-  // of data bytes that must remain in the input to avoid aborting the
-  // loop.
-#define GET_INPUT(label, remain)                                \
-  label:                                                        \
-  --szsrc;                                                      \
-  ch = *src++;                                                  \
-  decode = unbase64[ch];                                        \
-  if (decode < 0) {                                             \
-    if (absl::ascii_isspace(ch) && szsrc >= remain) goto label; \
-    state = 4 - remain;                                         \
-    break;                                                      \
-  }
-
-  // if dest is null, we're just checking to see if it's legal input
-  // rather than producing output.  (I suspect this could just be done
-  // with a regexp...).  We duplicate the loop so this test can be
-  // outside it instead of in every iteration.
-
-  if (dest) {
-    // This loop consumes 4 input bytes and produces 3 output bytes
-    // per iteration.  We can't know at the start that there is enough
-    // data left in the string for a full iteration, so the loop may
-    // break out in the middle; if so 'state' will be set to the
-    // number of input bytes read.
-
-    while (szsrc >= 4) {
-      // We'll start by optimistically assuming that the next four
-      // bytes of the string (src[0..3]) are four good data bytes
-      // (that is, no nulls, whitespace, padding chars, or illegal
-      // chars).  We need to test src[0..2] for nulls individually
-      // before constructing temp to preserve the property that we
-      // never read past a null in the string (no matter how long
-      // szsrc claims the string is).
-
-      if (!src[0] || !src[1] || !src[2] ||
-          ((temp = ((unsigned(unbase64[src[0]]) << 18) |
-                    (unsigned(unbase64[src[1]]) << 12) |
-                    (unsigned(unbase64[src[2]]) << 6) |
-                    (unsigned(unbase64[src[3]])))) &
-           0x80000000)) {
-        // Iff any of those four characters was bad (null, illegal,
-        // whitespace, padding), then temp's high bit will be set
-        // (because unbase64[] is -1 for all bad characters).
-        //
-        // We'll back up and resort to the slower decoder, which knows
-        // how to handle those cases.
-
-        GET_INPUT(first, 4);
-        temp = decode;
-        GET_INPUT(second, 3);
-        temp = (temp << 6) | decode;
-        GET_INPUT(third, 2);
-        temp = (temp << 6) | decode;
-        GET_INPUT(fourth, 1);
-        temp = (temp << 6) | decode;
-      } else {
-        // We really did have four good data bytes, so advance four
-        // characters in the string.
-
-        szsrc -= 4;
-        src += 4;
-      }
-
-      // temp has 24 bits of input, so write that out as three bytes.
-
-      if (destidx + 3 > szdest) return false;
-      dest[destidx + 2] = temp;
-      temp >>= 8;
-      dest[destidx + 1] = temp;
-      temp >>= 8;
-      dest[destidx] = temp;
-      destidx += 3;
-    }
-  } else {
-    while (szsrc >= 4) {
-      if (!src[0] || !src[1] || !src[2] ||
-          ((temp = ((unsigned(unbase64[src[0]]) << 18) |
-                    (unsigned(unbase64[src[1]]) << 12) |
-                    (unsigned(unbase64[src[2]]) << 6) |
-                    (unsigned(unbase64[src[3]])))) &
-           0x80000000)) {
-        GET_INPUT(first_no_dest, 4);
-        GET_INPUT(second_no_dest, 3);
-        GET_INPUT(third_no_dest, 2);
-        GET_INPUT(fourth_no_dest, 1);
-      } else {
-        szsrc -= 4;
-        src += 4;
-      }
-      destidx += 3;
-    }
-  }
-
-#undef GET_INPUT
-
-  // if the loop terminated because we read a bad character, return
-  // now.
-  if (decode < 0 && ch != kPad64Equals && ch != kPad64Dot &&
-      !absl::ascii_isspace(ch))
-    return false;
-
-  if (ch == kPad64Equals || ch == kPad64Dot) {
-    // if we stopped by hitting an '=' or '.', un-read that character -- we'll
-    // look at it again when we count to check for the proper number of
-    // equals signs at the end.
-    ++szsrc;
-    --src;
-  } else {
-    // This loop consumes 1 input byte per iteration.  It's used to
-    // clean up the 0-3 input bytes remaining when the first, faster
-    // loop finishes.  'temp' contains the data from 'state' input
-    // characters read by the first loop.
-    while (szsrc > 0) {
-      --szsrc;
-      ch = *src++;
-      decode = unbase64[ch];
-      if (decode < 0) {
-        if (absl::ascii_isspace(ch)) {
-          continue;
-        } else if (ch == kPad64Equals || ch == kPad64Dot) {
-          // back up one character; we'll read it again when we check
-          // for the correct number of pad characters at the end.
-          ++szsrc;
-          --src;
-          break;
-        } else {
-          return false;
-        }
-      }
-
-      // Each input character gives us six bits of output.
-      temp = (temp << 6) | decode;
-      ++state;
-      if (state == 4) {
-        // If we've accumulated 24 bits of output, write that out as
-        // three bytes.
-        if (dest) {
-          if (destidx + 3 > szdest) return false;
-          dest[destidx + 2] = temp;
-          temp >>= 8;
-          dest[destidx + 1] = temp;
-          temp >>= 8;
-          dest[destidx] = temp;
-        }
-        destidx += 3;
-        state = 0;
-        temp = 0;
-      }
-    }
-  }
-
-  // Process the leftover data contained in 'temp' at the end of the input.
-  int expected_equals = 0;
-  switch (state) {
-    case 0:
-      // Nothing left over; output is a multiple of 3 bytes.
-      break;
-
-    case 1:
-      // Bad input; we have 6 bits left over.
-      return false;
-
-    case 2:
-      // Produce one more output byte from the 12 input bits we have left.
-      if (dest) {
-        if (destidx + 1 > szdest) return false;
-        temp >>= 4;
-        dest[destidx] = temp;
-      }
-      ++destidx;
-      expected_equals = 2;
-      break;
-
-    case 3:
-      // Produce two more output bytes from the 18 input bits we have left.
-      if (dest) {
-        if (destidx + 2 > szdest) return false;
-        temp >>= 2;
-        dest[destidx + 1] = temp;
-        temp >>= 8;
-        dest[destidx] = temp;
-      }
-      destidx += 2;
-      expected_equals = 1;
-      break;
-
-    default:
-      // state should have no other values at this point.
-      ABSL_RAW_LOG(FATAL, "This can't happen; base64 decoder state = %d",
-                   state);
-  }
-
-  // The remainder of the string should be all whitespace, mixed with
-  // exactly 0 equals signs, or exactly 'expected_equals' equals
-  // signs.  (Always accepting 0 equals signs is an Abseil extension
-  // not covered in the RFC, as is accepting dot as the pad character.)
-
-  int equals = 0;
-  while (szsrc > 0) {
-    if (*src == kPad64Equals || *src == kPad64Dot)
-      ++equals;
-    else if (!absl::ascii_isspace(*src))
-      return false;
-    --szsrc;
-    ++src;
-  }
-
-  const bool ok = (equals == 0 || equals == expected_equals);
-  if (ok) *len = destidx;
-  return ok;
-}
-
-// The arrays below were generated by the following code
-// #include <sys/time.h>
-// #include <stdlib.h>
-// #include <string.h>
-// main()
-// {
-//   static const char Base64[] =
-//     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-//   char* pos;
-//   int idx, i, j;
-//   printf("    ");
-//   for (i = 0; i < 255; i += 8) {
-//     for (j = i; j < i + 8; j++) {
-//       pos = strchr(Base64, j);
-//       if ((pos == nullptr) || (j == 0))
-//         idx = -1;
-//       else
-//         idx = pos - Base64;
-//       if (idx == -1)
-//         printf(" %2d,     ", idx);
-//       else
-//         printf(" %2d/*%c*/,", idx, j);
-//     }
-//     printf("\n    ");
-//   }
-// }
-//
-// where the value of "Base64[]" was replaced by one of the base-64 conversion
-// tables from the functions below.
-/* clang-format off */
-constexpr signed char kUnBase64[] = {
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      62/*+*/, -1,      -1,      -1,      63/*/ */,
-    52/*0*/, 53/*1*/, 54/*2*/, 55/*3*/, 56/*4*/, 57/*5*/, 58/*6*/, 59/*7*/,
-    60/*8*/, 61/*9*/, -1,      -1,      -1,      -1,      -1,      -1,
-    -1,       0/*A*/,  1/*B*/,  2/*C*/,  3/*D*/,  4/*E*/,  5/*F*/,  6/*G*/,
-    07/*H*/,  8/*I*/,  9/*J*/, 10/*K*/, 11/*L*/, 12/*M*/, 13/*N*/, 14/*O*/,
-    15/*P*/, 16/*Q*/, 17/*R*/, 18/*S*/, 19/*T*/, 20/*U*/, 21/*V*/, 22/*W*/,
-    23/*X*/, 24/*Y*/, 25/*Z*/, -1,      -1,      -1,      -1,      -1,
-    -1,      26/*a*/, 27/*b*/, 28/*c*/, 29/*d*/, 30/*e*/, 31/*f*/, 32/*g*/,
-    33/*h*/, 34/*i*/, 35/*j*/, 36/*k*/, 37/*l*/, 38/*m*/, 39/*n*/, 40/*o*/,
-    41/*p*/, 42/*q*/, 43/*r*/, 44/*s*/, 45/*t*/, 46/*u*/, 47/*v*/, 48/*w*/,
-    49/*x*/, 50/*y*/, 51/*z*/, -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1
-};
-
-constexpr signed char kUnWebSafeBase64[] = {
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      62/*-*/, -1,      -1,
-    52/*0*/, 53/*1*/, 54/*2*/, 55/*3*/, 56/*4*/, 57/*5*/, 58/*6*/, 59/*7*/,
-    60/*8*/, 61/*9*/, -1,      -1,      -1,      -1,      -1,      -1,
-    -1,       0/*A*/,  1/*B*/,  2/*C*/,  3/*D*/,  4/*E*/,  5/*F*/,  6/*G*/,
-    07/*H*/,  8/*I*/,  9/*J*/, 10/*K*/, 11/*L*/, 12/*M*/, 13/*N*/, 14/*O*/,
-    15/*P*/, 16/*Q*/, 17/*R*/, 18/*S*/, 19/*T*/, 20/*U*/, 21/*V*/, 22/*W*/,
-    23/*X*/, 24/*Y*/, 25/*Z*/, -1,      -1,      -1,      -1,      63/*_*/,
-    -1,      26/*a*/, 27/*b*/, 28/*c*/, 29/*d*/, 30/*e*/, 31/*f*/, 32/*g*/,
-    33/*h*/, 34/*i*/, 35/*j*/, 36/*k*/, 37/*l*/, 38/*m*/, 39/*n*/, 40/*o*/,
-    41/*p*/, 42/*q*/, 43/*r*/, 44/*s*/, 45/*t*/, 46/*u*/, 47/*v*/, 48/*w*/,
-    49/*x*/, 50/*y*/, 51/*z*/, -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1,
-    -1,      -1,      -1,      -1,      -1,      -1,      -1,      -1
-};
-/* clang-format on */
-
-constexpr char kWebSafeBase64Chars[] =
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
-
-template <typename String>
-bool Base64UnescapeInternal(const char* src, size_t slen, String* dest,
-                            const signed char* unbase64) {
-  // Determine the size of the output string.  Base64 encodes every 3 bytes into
-  // 4 characters.  any leftover chars are added directly for good measure.
-  // This is documented in the base64 RFC: http://tools.ietf.org/html/rfc3548
-  const size_t dest_len = 3 * (slen / 4) + (slen % 4);
-
-  strings_internal::STLStringResizeUninitialized(dest, dest_len);
-
-  // We are getting the destination buffer by getting the beginning of the
-  // string and converting it into a char *.
-  size_t len;
-  const bool ok =
-      Base64UnescapeInternal(src, slen, &(*dest)[0], dest_len, unbase64, &len);
-  if (!ok) {
-    dest->clear();
-    return false;
-  }
-
-  // could be shorter if there was padding
-  assert(len <= dest_len);
-  dest->erase(len);
-
-  return true;
-}
-
-/* clang-format off */
-constexpr char kHexValueLenient[256] = {
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  1,  2,  3,  4,  5,  6, 7, 8, 9, 0, 0, 0, 0, 0, 0,  // '0'..'9'
-    0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0,  // 'A'..'F'
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0,  // 'a'..'f'
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0,  0,  0,  0,  0,  0,  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-
-/* clang-format on */
-
-// This is a templated function so that T can be either a char*
-// or a string.  This works because we use the [] operator to access
-// individual characters at a time.
-template <typename T>
-void HexStringToBytesInternal(const char* from, T to, ptrdiff_t num) {
-  for (int i = 0; i < num; i++) {
-    to[i] = (kHexValueLenient[from[i * 2] & 0xFF] << 4) +
-            (kHexValueLenient[from[i * 2 + 1] & 0xFF]);
-  }
-}
-
-// This is a templated function so that T can be either a char* or a
-// std::string.
-template <typename T>
-void BytesToHexStringInternal(const unsigned char* src, T dest, ptrdiff_t num) {
-  auto dest_ptr = &dest[0];
-  for (auto src_ptr = src; src_ptr != (src + num); ++src_ptr, dest_ptr += 2) {
-    const char* hex_p = &numbers_internal::kHexTable[*src_ptr * 2];
-    std::copy(hex_p, hex_p + 2, dest_ptr);
-  }
-}
-
-}  // namespace
-
-// ----------------------------------------------------------------------
-// CUnescape()
-//
-// See CUnescapeInternal() for implementation details.
-// ----------------------------------------------------------------------
-bool CUnescape(absl::string_view source, std::string* dest,
-               std::string* error) {
-  return CUnescapeInternal(source, kUnescapeNulls, dest, error);
-}
-
-std::string CEscape(absl::string_view src) {
-  std::string dest;
-  CEscapeAndAppendInternal(src, &dest);
-  return dest;
-}
-
-std::string CHexEscape(absl::string_view src) {
-  return CEscapeInternal(src, true, false);
-}
-
-std::string Utf8SafeCEscape(absl::string_view src) {
-  return CEscapeInternal(src, false, true);
-}
-
-std::string Utf8SafeCHexEscape(absl::string_view src) {
-  return CEscapeInternal(src, true, true);
-}
-
-// ----------------------------------------------------------------------
-// Base64Unescape() - base64 decoder
-// Base64Escape() - base64 encoder
-// WebSafeBase64Unescape() - Google's variation of base64 decoder
-// WebSafeBase64Escape() - Google's variation of base64 encoder
-//
-// Check out
-// http://tools.ietf.org/html/rfc2045 for formal description, but what we
-// care about is that...
-//   Take the encoded stuff in groups of 4 characters and turn each
-//   character into a code 0 to 63 thus:
-//           A-Z map to 0 to 25
-//           a-z map to 26 to 51
-//           0-9 map to 52 to 61
-//           +(- for WebSafe) maps to 62
-//           /(_ for WebSafe) maps to 63
-//   There will be four numbers, all less than 64 which can be represented
-//   by a 6 digit binary number (aaaaaa, bbbbbb, cccccc, dddddd respectively).
-//   Arrange the 6 digit binary numbers into three bytes as such:
-//   aaaaaabb bbbbcccc ccdddddd
-//   Equals signs (one or two) are used at the end of the encoded block to
-//   indicate that the text was not an integer multiple of three bytes long.
-// ----------------------------------------------------------------------
-
-bool Base64Unescape(absl::string_view src, std::string* dest) {
-  return Base64UnescapeInternal(src.data(), src.size(), dest, kUnBase64);
-}
-
-bool WebSafeBase64Unescape(absl::string_view src, std::string* dest) {
-  return Base64UnescapeInternal(src.data(), src.size(), dest, kUnWebSafeBase64);
-}
-
-void Base64Escape(absl::string_view src, std::string* dest) {
-  strings_internal::Base64EscapeInternal(
-      reinterpret_cast<const unsigned char*>(src.data()), src.size(), dest,
-      true, strings_internal::kBase64Chars);
-}
-
-void WebSafeBase64Escape(absl::string_view src, std::string* dest) {
-  strings_internal::Base64EscapeInternal(
-      reinterpret_cast<const unsigned char*>(src.data()), src.size(), dest,
-      false, kWebSafeBase64Chars);
-}
-
-std::string Base64Escape(absl::string_view src) {
-  std::string dest;
-  strings_internal::Base64EscapeInternal(
-      reinterpret_cast<const unsigned char*>(src.data()), src.size(), &dest,
-      true, strings_internal::kBase64Chars);
-  return dest;
-}
-
-std::string WebSafeBase64Escape(absl::string_view src) {
-  std::string dest;
-  strings_internal::Base64EscapeInternal(
-      reinterpret_cast<const unsigned char*>(src.data()), src.size(), &dest,
-      false, kWebSafeBase64Chars);
-  return dest;
-}
-
-std::string HexStringToBytes(absl::string_view from) {
-  std::string result;
-  const auto num = from.size() / 2;
-  strings_internal::STLStringResizeUninitialized(&result, num);
-  absl::HexStringToBytesInternal<std::string&>(from.data(), result, num);
-  return result;
-}
-
-std::string BytesToHexString(absl::string_view from) {
-  std::string result;
-  strings_internal::STLStringResizeUninitialized(&result, 2 * from.size());
-  absl::BytesToHexStringInternal<std::string&>(
-      reinterpret_cast<const unsigned char*>(from.data()), result, from.size());
-  return result;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/escaping.h b/third_party/abseil/absl/strings/escaping.h
deleted file mode 100644
index f5ca26c..0000000
--- a/third_party/abseil/absl/strings/escaping.h
+++ /dev/null
@@ -1,164 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: escaping.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains string utilities involved in escaping and
-// unescaping strings in various ways.
-
-#ifndef ABSL_STRINGS_ESCAPING_H_
-#define ABSL_STRINGS_ESCAPING_H_
-
-#include <cstddef>
-#include <string>
-#include <vector>
-
-#include "absl/base/macros.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/str_join.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// CUnescape()
-//
-// Unescapes a `source` string and copies it into `dest`, rewriting C-style
-// escape sequences (https://en.cppreference.com/w/cpp/language/escape) into
-// their proper code point equivalents, returning `true` if successful.
-//
-// The following unescape sequences can be handled:
-//
-//   * ASCII escape sequences ('\n','\r','\\', etc.) to their ASCII equivalents
-//   * Octal escape sequences ('\nnn') to byte nnn. The unescaped value must
-//     resolve to a single byte or an error will occur. E.g. values greater than
-//     0xff will produce an error.
-//   * Hexadecimal escape sequences ('\xnn') to byte nn. While an arbitrary
-//     number of following digits are allowed, the unescaped value must resolve
-//     to a single byte or an error will occur. E.g. '\x0045' is equivalent to
-//     '\x45', but '\x1234' will produce an error.
-//   * Unicode escape sequences ('\unnnn' for exactly four hex digits or
-//     '\Unnnnnnnn' for exactly eight hex digits, which will be encoded in
-//     UTF-8. (E.g., `\u2019` unescapes to the three bytes 0xE2, 0x80, and
-//     0x99).
-//
-// If any errors are encountered, this function returns `false`, leaving the
-// `dest` output parameter in an unspecified state, and stores the first
-// encountered error in `error`. To disable error reporting, set `error` to
-// `nullptr` or use the overload with no error reporting below.
-//
-// Example:
-//
-//   std::string s = "foo\\rbar\\nbaz\\t";
-//   std::string unescaped_s;
-//   if (!absl::CUnescape(s, &unescaped_s) {
-//     ...
-//   }
-//   EXPECT_EQ(unescaped_s, "foo\rbar\nbaz\t");
-bool CUnescape(absl::string_view source, std::string* dest, std::string* error);
-
-// Overload of `CUnescape()` with no error reporting.
-inline bool CUnescape(absl::string_view source, std::string* dest) {
-  return CUnescape(source, dest, nullptr);
-}
-
-// CEscape()
-//
-// Escapes a 'src' string using C-style escapes sequences
-// (https://en.cppreference.com/w/cpp/language/escape), escaping other
-// non-printable/non-whitespace bytes as octal sequences (e.g. "\377").
-//
-// Example:
-//
-//   std::string s = "foo\rbar\tbaz\010\011\012\013\014\x0d\n";
-//   std::string escaped_s = absl::CEscape(s);
-//   EXPECT_EQ(escaped_s, "foo\\rbar\\tbaz\\010\\t\\n\\013\\014\\r\\n");
-std::string CEscape(absl::string_view src);
-
-// CHexEscape()
-//
-// Escapes a 'src' string using C-style escape sequences, escaping
-// other non-printable/non-whitespace bytes as hexadecimal sequences (e.g.
-// "\xFF").
-//
-// Example:
-//
-//   std::string s = "foo\rbar\tbaz\010\011\012\013\014\x0d\n";
-//   std::string escaped_s = absl::CHexEscape(s);
-//   EXPECT_EQ(escaped_s, "foo\\rbar\\tbaz\\x08\\t\\n\\x0b\\x0c\\r\\n");
-std::string CHexEscape(absl::string_view src);
-
-// Utf8SafeCEscape()
-//
-// Escapes a 'src' string using C-style escape sequences, escaping bytes as
-// octal sequences, and passing through UTF-8 characters without conversion.
-// I.e., when encountering any bytes with their high bit set, this function
-// will not escape those values, whether or not they are valid UTF-8.
-std::string Utf8SafeCEscape(absl::string_view src);
-
-// Utf8SafeCHexEscape()
-//
-// Escapes a 'src' string using C-style escape sequences, escaping bytes as
-// hexadecimal sequences, and passing through UTF-8 characters without
-// conversion.
-std::string Utf8SafeCHexEscape(absl::string_view src);
-
-// Base64Unescape()
-//
-// Converts a `src` string encoded in Base64 to its binary equivalent, writing
-// it to a `dest` buffer, returning `true` on success. If `src` contains invalid
-// characters, `dest` is cleared and returns `false`.
-bool Base64Unescape(absl::string_view src, std::string* dest);
-
-// WebSafeBase64Unescape()
-//
-// Converts a `src` string encoded in Base64 to its binary equivalent, writing
-// it to a `dest` buffer, but using '-' instead of '+', and '_' instead of '/'.
-// If `src` contains invalid characters, `dest` is cleared and returns `false`.
-bool WebSafeBase64Unescape(absl::string_view src, std::string* dest);
-
-// Base64Escape()
-//
-// Encodes a `src` string into a base64-encoded string, with padding characters.
-// This function conforms with RFC 4648 section 4 (base64).
-void Base64Escape(absl::string_view src, std::string* dest);
-std::string Base64Escape(absl::string_view src);
-
-// WebSafeBase64Escape()
-//
-// Encodes a `src` string into a base64-like string, using '-' instead of '+'
-// and '_' instead of '/', and without padding. This function conforms with RFC
-// 4648 section 5 (base64url).
-void WebSafeBase64Escape(absl::string_view src, std::string* dest);
-std::string WebSafeBase64Escape(absl::string_view src);
-
-// HexStringToBytes()
-//
-// Converts an ASCII hex string into bytes, returning binary data of length
-// `from.size()/2`.
-std::string HexStringToBytes(absl::string_view from);
-
-// BytesToHexString()
-//
-// Converts binary data into an ASCII text string, returning a string of size
-// `2*from.size()`.
-std::string BytesToHexString(absl::string_view from);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_ESCAPING_H_
diff --git a/third_party/abseil/absl/strings/escaping_benchmark.cc b/third_party/abseil/absl/strings/escaping_benchmark.cc
deleted file mode 100644
index 10d5b03..0000000
--- a/third_party/abseil/absl/strings/escaping_benchmark.cc
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/escaping.h"
-
-#include <cstdio>
-#include <cstring>
-#include <random>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/internal/escaping_test_common.h"
-
-namespace {
-
-void BM_CUnescapeHexString(benchmark::State& state) {
-  std::string src;
-  for (int i = 0; i < 50; i++) {
-    src += "\\x55";
-  }
-  std::string dest;
-  for (auto _ : state) {
-    absl::CUnescape(src, &dest);
-  }
-}
-BENCHMARK(BM_CUnescapeHexString);
-
-void BM_WebSafeBase64Escape_string(benchmark::State& state) {
-  std::string raw;
-  for (int i = 0; i < 10; ++i) {
-    for (const auto& test_set : absl::strings_internal::base64_strings()) {
-      raw += std::string(test_set.plaintext);
-    }
-  }
-
-  // The actual benchmark loop is tiny...
-  std::string escaped;
-  for (auto _ : state) {
-    absl::WebSafeBase64Escape(raw, &escaped);
-  }
-
-  // We want to be sure the compiler doesn't throw away the loop above,
-  // and the easiest way to ensure that is to round-trip the results and verify
-  // them.
-  std::string round_trip;
-  absl::WebSafeBase64Unescape(escaped, &round_trip);
-  ABSL_RAW_CHECK(round_trip == raw, "");
-}
-BENCHMARK(BM_WebSafeBase64Escape_string);
-
-// Used for the CEscape benchmarks
-const char kStringValueNoEscape[] = "1234567890";
-const char kStringValueSomeEscaped[] = "123\n56789\xA1";
-const char kStringValueMostEscaped[] = "\xA1\xA2\ny\xA4\xA5\xA6z\b\r";
-
-void CEscapeBenchmarkHelper(benchmark::State& state, const char* string_value,
-                            int max_len) {
-  std::string src;
-  while (src.size() < max_len) {
-    absl::StrAppend(&src, string_value);
-  }
-
-  for (auto _ : state) {
-    absl::CEscape(src);
-  }
-}
-
-void BM_CEscape_NoEscape(benchmark::State& state) {
-  CEscapeBenchmarkHelper(state, kStringValueNoEscape, state.range(0));
-}
-BENCHMARK(BM_CEscape_NoEscape)->Range(1, 1 << 14);
-
-void BM_CEscape_SomeEscaped(benchmark::State& state) {
-  CEscapeBenchmarkHelper(state, kStringValueSomeEscaped, state.range(0));
-}
-BENCHMARK(BM_CEscape_SomeEscaped)->Range(1, 1 << 14);
-
-void BM_CEscape_MostEscaped(benchmark::State& state) {
-  CEscapeBenchmarkHelper(state, kStringValueMostEscaped, state.range(0));
-}
-BENCHMARK(BM_CEscape_MostEscaped)->Range(1, 1 << 14);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/escaping_test.cc b/third_party/abseil/absl/strings/escaping_test.cc
deleted file mode 100644
index 45671a0..0000000
--- a/third_party/abseil/absl/strings/escaping_test.cc
+++ /dev/null
@@ -1,664 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/escaping.h"
-
-#include <array>
-#include <cstdio>
-#include <cstring>
-#include <memory>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/container/fixed_array.h"
-#include "absl/strings/str_cat.h"
-
-#include "absl/strings/internal/escaping_test_common.h"
-
-namespace {
-
-struct epair {
-  std::string escaped;
-  std::string unescaped;
-};
-
-TEST(CEscape, EscapeAndUnescape) {
-  const std::string inputs[] = {
-      std::string("foo\nxx\r\b\0023"),
-      std::string(""),
-      std::string("abc"),
-      std::string("\1chad_rules"),
-      std::string("\1arnar_drools"),
-      std::string("xxxx\r\t'\"\\"),
-      std::string("\0xx\0", 4),
-      std::string("\x01\x31"),
-      std::string("abc\xb\x42\141bc"),
-      std::string("123\1\x31\x32\x33"),
-      std::string("\xc1\xca\x1b\x62\x19o\xcc\x04"),
-      std::string(
-          "\\\"\xe8\xb0\xb7\xe6\xad\x8c\\\" is Google\\\'s Chinese name"),
-  };
-  // Do this twice, once for octal escapes and once for hex escapes.
-  for (int kind = 0; kind < 4; kind++) {
-    for (const std::string& original : inputs) {
-      std::string escaped;
-      switch (kind) {
-        case 0:
-          escaped = absl::CEscape(original);
-          break;
-        case 1:
-          escaped = absl::CHexEscape(original);
-          break;
-        case 2:
-          escaped = absl::Utf8SafeCEscape(original);
-          break;
-        case 3:
-          escaped = absl::Utf8SafeCHexEscape(original);
-          break;
-      }
-      std::string unescaped_str;
-      EXPECT_TRUE(absl::CUnescape(escaped, &unescaped_str));
-      EXPECT_EQ(unescaped_str, original);
-
-      unescaped_str.erase();
-      std::string error;
-      EXPECT_TRUE(absl::CUnescape(escaped, &unescaped_str, &error));
-      EXPECT_EQ(error, "");
-
-      // Check in-place unescaping
-      std::string s = escaped;
-      EXPECT_TRUE(absl::CUnescape(s, &s));
-      ASSERT_EQ(s, original);
-    }
-  }
-  // Check that all possible two character strings can be escaped then
-  // unescaped successfully.
-  for (int char0 = 0; char0 < 256; char0++) {
-    for (int char1 = 0; char1 < 256; char1++) {
-      char chars[2];
-      chars[0] = char0;
-      chars[1] = char1;
-      std::string s(chars, 2);
-      std::string escaped = absl::CHexEscape(s);
-      std::string unescaped;
-      EXPECT_TRUE(absl::CUnescape(escaped, &unescaped));
-      EXPECT_EQ(s, unescaped);
-    }
-  }
-}
-
-TEST(CEscape, BasicEscaping) {
-  epair oct_values[] = {
-      {"foo\\rbar\\nbaz\\t", "foo\rbar\nbaz\t"},
-      {"\\'full of \\\"sound\\\" and \\\"fury\\\"\\'",
-       "'full of \"sound\" and \"fury\"'"},
-      {"signi\\\\fying\\\\ nothing\\\\", "signi\\fying\\ nothing\\"},
-      {"\\010\\t\\n\\013\\014\\r", "\010\011\012\013\014\015"}
-  };
-  epair hex_values[] = {
-      {"ubik\\rubik\\nubik\\t", "ubik\rubik\nubik\t"},
-      {"I\\\'ve just seen a \\\"face\\\"",
-       "I've just seen a \"face\""},
-      {"hel\\\\ter\\\\skel\\\\ter\\\\", "hel\\ter\\skel\\ter\\"},
-      {"\\x08\\t\\n\\x0b\\x0c\\r", "\010\011\012\013\014\015"}
-  };
-  epair utf8_oct_values[] = {
-      {"\xe8\xb0\xb7\xe6\xad\x8c\\r\xe8\xb0\xb7\xe6\xad\x8c\\nbaz\\t",
-       "\xe8\xb0\xb7\xe6\xad\x8c\r\xe8\xb0\xb7\xe6\xad\x8c\nbaz\t"},
-      {"\\\"\xe8\xb0\xb7\xe6\xad\x8c\\\" is Google\\\'s Chinese name",
-       "\"\xe8\xb0\xb7\xe6\xad\x8c\" is Google\'s Chinese name"},
-      {"\xe3\x83\xa1\xe3\x83\xbc\xe3\x83\xab\\\\are\\\\Japanese\\\\chars\\\\",
-       "\xe3\x83\xa1\xe3\x83\xbc\xe3\x83\xab\\are\\Japanese\\chars\\"},
-      {"\xed\x81\xac\xeb\xa1\xac\\010\\t\\n\\013\\014\\r",
-       "\xed\x81\xac\xeb\xa1\xac\010\011\012\013\014\015"}
-  };
-  epair utf8_hex_values[] = {
-      {"\x20\xe4\xbd\xa0\\t\xe5\xa5\xbd,\\r!\\n",
-       "\x20\xe4\xbd\xa0\t\xe5\xa5\xbd,\r!\n"},
-      {"\xe8\xa9\xa6\xe9\xa8\x93\\\' means \\\"test\\\"",
-       "\xe8\xa9\xa6\xe9\xa8\x93\' means \"test\""},
-      {"\\\\\xe6\x88\x91\\\\:\\\\\xe6\x9d\xa8\xe6\xac\xa2\\\\",
-       "\\\xe6\x88\x91\\:\\\xe6\x9d\xa8\xe6\xac\xa2\\"},
-      {"\xed\x81\xac\xeb\xa1\xac\\x08\\t\\n\\x0b\\x0c\\r",
-       "\xed\x81\xac\xeb\xa1\xac\010\011\012\013\014\015"}
-  };
-
-  for (const epair& val : oct_values) {
-    std::string escaped = absl::CEscape(val.unescaped);
-    EXPECT_EQ(escaped, val.escaped);
-  }
-  for (const epair& val : hex_values) {
-    std::string escaped = absl::CHexEscape(val.unescaped);
-    EXPECT_EQ(escaped, val.escaped);
-  }
-  for (const epair& val : utf8_oct_values) {
-    std::string escaped = absl::Utf8SafeCEscape(val.unescaped);
-    EXPECT_EQ(escaped, val.escaped);
-  }
-  for (const epair& val : utf8_hex_values) {
-    std::string escaped = absl::Utf8SafeCHexEscape(val.unescaped);
-    EXPECT_EQ(escaped, val.escaped);
-  }
-}
-
-TEST(Unescape, BasicFunction) {
-  epair tests[] =
-    {{"", ""},
-     {"\\u0030", "0"},
-     {"\\u00A3", "\xC2\xA3"},
-     {"\\u22FD", "\xE2\x8B\xBD"},
-     {"\\U00010000", "\xF0\x90\x80\x80"},
-     {"\\U0010FFFD", "\xF4\x8F\xBF\xBD"}};
-  for (const epair& val : tests) {
-    std::string out;
-    EXPECT_TRUE(absl::CUnescape(val.escaped, &out));
-    EXPECT_EQ(out, val.unescaped);
-  }
-  std::string bad[] = {"\\u1",         // too short
-                       "\\U1",         // too short
-                       "\\Uffffff",    // exceeds 0x10ffff (largest Unicode)
-                       "\\U00110000",  // exceeds 0x10ffff (largest Unicode)
-                       "\\uD835",      // surrogate character (D800-DFFF)
-                       "\\U0000DD04",  // surrogate character (D800-DFFF)
-                       "\\777",        // exceeds 0xff
-                       "\\xABCD"};     // exceeds 0xff
-  for (const std::string& e : bad) {
-    std::string error;
-    std::string out;
-    EXPECT_FALSE(absl::CUnescape(e, &out, &error));
-    EXPECT_FALSE(error.empty());
-
-    out.erase();
-    EXPECT_FALSE(absl::CUnescape(e, &out));
-  }
-}
-
-class CUnescapeTest : public testing::Test {
- protected:
-  static const char kStringWithMultipleOctalNulls[];
-  static const char kStringWithMultipleHexNulls[];
-  static const char kStringWithMultipleUnicodeNulls[];
-
-  std::string result_string_;
-};
-
-const char CUnescapeTest::kStringWithMultipleOctalNulls[] =
-    "\\0\\n"    // null escape \0 plus newline
-    "0\\n"      // just a number 0 (not a null escape) plus newline
-    "\\00\\12"  // null escape \00 plus octal newline code
-    "\\000";    // null escape \000
-
-// This has the same ingredients as kStringWithMultipleOctalNulls
-// but with \x hex escapes instead of octal escapes.
-const char CUnescapeTest::kStringWithMultipleHexNulls[] =
-    "\\x0\\n"
-    "0\\n"
-    "\\x00\\xa"
-    "\\x000";
-
-const char CUnescapeTest::kStringWithMultipleUnicodeNulls[] =
-    "\\u0000\\n"    // short-form (4-digit) null escape plus newline
-    "0\\n"          // just a number 0 (not a null escape) plus newline
-    "\\U00000000";  // long-form (8-digit) null escape
-
-TEST_F(CUnescapeTest, Unescapes1CharOctalNull) {
-  std::string original_string = "\\0";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes2CharOctalNull) {
-  std::string original_string = "\\00";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes3CharOctalNull) {
-  std::string original_string = "\\000";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes1CharHexNull) {
-  std::string original_string = "\\x0";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes2CharHexNull) {
-  std::string original_string = "\\x00";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes3CharHexNull) {
-  std::string original_string = "\\x000";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes4CharUnicodeNull) {
-  std::string original_string = "\\u0000";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, Unescapes8CharUnicodeNull) {
-  std::string original_string = "\\U00000000";
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0", 1), result_string_);
-}
-
-TEST_F(CUnescapeTest, UnescapesMultipleOctalNulls) {
-  std::string original_string(kStringWithMultipleOctalNulls);
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  // All escapes, including newlines and null escapes, should have been
-  // converted to the equivalent characters.
-  EXPECT_EQ(std::string("\0\n"
-                        "0\n"
-                        "\0\n"
-                        "\0",
-                        7),
-            result_string_);
-}
-
-
-TEST_F(CUnescapeTest, UnescapesMultipleHexNulls) {
-  std::string original_string(kStringWithMultipleHexNulls);
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0\n"
-                        "0\n"
-                        "\0\n"
-                        "\0",
-                        7),
-            result_string_);
-}
-
-TEST_F(CUnescapeTest, UnescapesMultipleUnicodeNulls) {
-  std::string original_string(kStringWithMultipleUnicodeNulls);
-  EXPECT_TRUE(absl::CUnescape(original_string, &result_string_));
-  EXPECT_EQ(std::string("\0\n"
-                        "0\n"
-                        "\0",
-                        5),
-            result_string_);
-}
-
-static struct {
-  absl::string_view plaintext;
-  absl::string_view cyphertext;
-} const base64_tests[] = {
-    // Empty string.
-    {{"", 0}, {"", 0}},
-    {{nullptr, 0},
-     {"", 0}},  // if length is zero, plaintext ptr must be ignored!
-
-    // Basic bit patterns;
-    // values obtained with "echo -n '...' | uuencode -m test"
-
-    {{"\000", 1}, "AA=="},
-    {{"\001", 1}, "AQ=="},
-    {{"\002", 1}, "Ag=="},
-    {{"\004", 1}, "BA=="},
-    {{"\010", 1}, "CA=="},
-    {{"\020", 1}, "EA=="},
-    {{"\040", 1}, "IA=="},
-    {{"\100", 1}, "QA=="},
-    {{"\200", 1}, "gA=="},
-
-    {{"\377", 1}, "/w=="},
-    {{"\376", 1}, "/g=="},
-    {{"\375", 1}, "/Q=="},
-    {{"\373", 1}, "+w=="},
-    {{"\367", 1}, "9w=="},
-    {{"\357", 1}, "7w=="},
-    {{"\337", 1}, "3w=="},
-    {{"\277", 1}, "vw=="},
-    {{"\177", 1}, "fw=="},
-    {{"\000\000", 2}, "AAA="},
-    {{"\000\001", 2}, "AAE="},
-    {{"\000\002", 2}, "AAI="},
-    {{"\000\004", 2}, "AAQ="},
-    {{"\000\010", 2}, "AAg="},
-    {{"\000\020", 2}, "ABA="},
-    {{"\000\040", 2}, "ACA="},
-    {{"\000\100", 2}, "AEA="},
-    {{"\000\200", 2}, "AIA="},
-    {{"\001\000", 2}, "AQA="},
-    {{"\002\000", 2}, "AgA="},
-    {{"\004\000", 2}, "BAA="},
-    {{"\010\000", 2}, "CAA="},
-    {{"\020\000", 2}, "EAA="},
-    {{"\040\000", 2}, "IAA="},
-    {{"\100\000", 2}, "QAA="},
-    {{"\200\000", 2}, "gAA="},
-
-    {{"\377\377", 2}, "//8="},
-    {{"\377\376", 2}, "//4="},
-    {{"\377\375", 2}, "//0="},
-    {{"\377\373", 2}, "//s="},
-    {{"\377\367", 2}, "//c="},
-    {{"\377\357", 2}, "/+8="},
-    {{"\377\337", 2}, "/98="},
-    {{"\377\277", 2}, "/78="},
-    {{"\377\177", 2}, "/38="},
-    {{"\376\377", 2}, "/v8="},
-    {{"\375\377", 2}, "/f8="},
-    {{"\373\377", 2}, "+/8="},
-    {{"\367\377", 2}, "9/8="},
-    {{"\357\377", 2}, "7/8="},
-    {{"\337\377", 2}, "3/8="},
-    {{"\277\377", 2}, "v/8="},
-    {{"\177\377", 2}, "f/8="},
-
-    {{"\000\000\000", 3}, "AAAA"},
-    {{"\000\000\001", 3}, "AAAB"},
-    {{"\000\000\002", 3}, "AAAC"},
-    {{"\000\000\004", 3}, "AAAE"},
-    {{"\000\000\010", 3}, "AAAI"},
-    {{"\000\000\020", 3}, "AAAQ"},
-    {{"\000\000\040", 3}, "AAAg"},
-    {{"\000\000\100", 3}, "AABA"},
-    {{"\000\000\200", 3}, "AACA"},
-    {{"\000\001\000", 3}, "AAEA"},
-    {{"\000\002\000", 3}, "AAIA"},
-    {{"\000\004\000", 3}, "AAQA"},
-    {{"\000\010\000", 3}, "AAgA"},
-    {{"\000\020\000", 3}, "ABAA"},
-    {{"\000\040\000", 3}, "ACAA"},
-    {{"\000\100\000", 3}, "AEAA"},
-    {{"\000\200\000", 3}, "AIAA"},
-    {{"\001\000\000", 3}, "AQAA"},
-    {{"\002\000\000", 3}, "AgAA"},
-    {{"\004\000\000", 3}, "BAAA"},
-    {{"\010\000\000", 3}, "CAAA"},
-    {{"\020\000\000", 3}, "EAAA"},
-    {{"\040\000\000", 3}, "IAAA"},
-    {{"\100\000\000", 3}, "QAAA"},
-    {{"\200\000\000", 3}, "gAAA"},
-
-    {{"\377\377\377", 3}, "////"},
-    {{"\377\377\376", 3}, "///+"},
-    {{"\377\377\375", 3}, "///9"},
-    {{"\377\377\373", 3}, "///7"},
-    {{"\377\377\367", 3}, "///3"},
-    {{"\377\377\357", 3}, "///v"},
-    {{"\377\377\337", 3}, "///f"},
-    {{"\377\377\277", 3}, "//+/"},
-    {{"\377\377\177", 3}, "//9/"},
-    {{"\377\376\377", 3}, "//7/"},
-    {{"\377\375\377", 3}, "//3/"},
-    {{"\377\373\377", 3}, "//v/"},
-    {{"\377\367\377", 3}, "//f/"},
-    {{"\377\357\377", 3}, "/+//"},
-    {{"\377\337\377", 3}, "/9//"},
-    {{"\377\277\377", 3}, "/7//"},
-    {{"\377\177\377", 3}, "/3//"},
-    {{"\376\377\377", 3}, "/v//"},
-    {{"\375\377\377", 3}, "/f//"},
-    {{"\373\377\377", 3}, "+///"},
-    {{"\367\377\377", 3}, "9///"},
-    {{"\357\377\377", 3}, "7///"},
-    {{"\337\377\377", 3}, "3///"},
-    {{"\277\377\377", 3}, "v///"},
-    {{"\177\377\377", 3}, "f///"},
-
-    // Random numbers: values obtained with
-    //
-    //  #! /bin/bash
-    //  dd bs=$1 count=1 if=/dev/random of=/tmp/bar.random
-    //  od -N $1 -t o1 /tmp/bar.random
-    //  uuencode -m test < /tmp/bar.random
-    //
-    // where $1 is the number of bytes (2, 3)
-
-    {{"\243\361", 2}, "o/E="},
-    {{"\024\167", 2}, "FHc="},
-    {{"\313\252", 2}, "y6o="},
-    {{"\046\041", 2}, "JiE="},
-    {{"\145\236", 2}, "ZZ4="},
-    {{"\254\325", 2}, "rNU="},
-    {{"\061\330", 2}, "Mdg="},
-    {{"\245\032", 2}, "pRo="},
-    {{"\006\000", 2}, "BgA="},
-    {{"\375\131", 2}, "/Vk="},
-    {{"\303\210", 2}, "w4g="},
-    {{"\040\037", 2}, "IB8="},
-    {{"\261\372", 2}, "sfo="},
-    {{"\335\014", 2}, "3Qw="},
-    {{"\233\217", 2}, "m48="},
-    {{"\373\056", 2}, "+y4="},
-    {{"\247\232", 2}, "p5o="},
-    {{"\107\053", 2}, "Rys="},
-    {{"\204\077", 2}, "hD8="},
-    {{"\276\211", 2}, "vok="},
-    {{"\313\110", 2}, "y0g="},
-    {{"\363\376", 2}, "8/4="},
-    {{"\251\234", 2}, "qZw="},
-    {{"\103\262", 2}, "Q7I="},
-    {{"\142\312", 2}, "Yso="},
-    {{"\067\211", 2}, "N4k="},
-    {{"\220\001", 2}, "kAE="},
-    {{"\152\240", 2}, "aqA="},
-    {{"\367\061", 2}, "9zE="},
-    {{"\133\255", 2}, "W60="},
-    {{"\176\035", 2}, "fh0="},
-    {{"\032\231", 2}, "Gpk="},
-
-    {{"\013\007\144", 3}, "Cwdk"},
-    {{"\030\112\106", 3}, "GEpG"},
-    {{"\047\325\046", 3}, "J9Um"},
-    {{"\310\160\022", 3}, "yHAS"},
-    {{"\131\100\237", 3}, "WUCf"},
-    {{"\064\342\134", 3}, "NOJc"},
-    {{"\010\177\004", 3}, "CH8E"},
-    {{"\345\147\205", 3}, "5WeF"},
-    {{"\300\343\360", 3}, "wOPw"},
-    {{"\061\240\201", 3}, "MaCB"},
-    {{"\225\333\044", 3}, "ldsk"},
-    {{"\215\137\352", 3}, "jV/q"},
-    {{"\371\147\160", 3}, "+Wdw"},
-    {{"\030\320\051", 3}, "GNAp"},
-    {{"\044\174\241", 3}, "JHyh"},
-    {{"\260\127\037", 3}, "sFcf"},
-    {{"\111\045\033", 3}, "SSUb"},
-    {{"\202\114\107", 3}, "gkxH"},
-    {{"\057\371\042", 3}, "L/ki"},
-    {{"\223\247\244", 3}, "k6ek"},
-    {{"\047\216\144", 3}, "J45k"},
-    {{"\203\070\327", 3}, "gzjX"},
-    {{"\247\140\072", 3}, "p2A6"},
-    {{"\124\115\116", 3}, "VE1O"},
-    {{"\157\162\050", 3}, "b3Io"},
-    {{"\357\223\004", 3}, "75ME"},
-    {{"\052\117\156", 3}, "Kk9u"},
-    {{"\347\154\000", 3}, "52wA"},
-    {{"\303\012\142", 3}, "wwpi"},
-    {{"\060\035\362", 3}, "MB3y"},
-    {{"\130\226\361", 3}, "WJbx"},
-    {{"\173\013\071", 3}, "ews5"},
-    {{"\336\004\027", 3}, "3gQX"},
-    {{"\357\366\234", 3}, "7/ac"},
-    {{"\353\304\111", 3}, "68RJ"},
-    {{"\024\264\131", 3}, "FLRZ"},
-    {{"\075\114\251", 3}, "PUyp"},
-    {{"\315\031\225", 3}, "zRmV"},
-    {{"\154\201\276", 3}, "bIG+"},
-    {{"\200\066\072", 3}, "gDY6"},
-    {{"\142\350\267", 3}, "Yui3"},
-    {{"\033\000\166", 3}, "GwB2"},
-    {{"\210\055\077", 3}, "iC0/"},
-    {{"\341\037\124", 3}, "4R9U"},
-    {{"\161\103\152", 3}, "cUNq"},
-    {{"\270\142\131", 3}, "uGJZ"},
-    {{"\337\076\074", 3}, "3z48"},
-    {{"\375\106\362", 3}, "/Uby"},
-    {{"\227\301\127", 3}, "l8FX"},
-    {{"\340\002\234", 3}, "4AKc"},
-    {{"\121\064\033", 3}, "UTQb"},
-    {{"\157\134\143", 3}, "b1xj"},
-    {{"\247\055\327", 3}, "py3X"},
-    {{"\340\142\005", 3}, "4GIF"},
-    {{"\060\260\143", 3}, "MLBj"},
-    {{"\075\203\170", 3}, "PYN4"},
-    {{"\143\160\016", 3}, "Y3AO"},
-    {{"\313\013\063", 3}, "ywsz"},
-    {{"\174\236\135", 3}, "fJ5d"},
-    {{"\103\047\026", 3}, "QycW"},
-    {{"\365\005\343", 3}, "9QXj"},
-    {{"\271\160\223", 3}, "uXCT"},
-    {{"\362\255\172", 3}, "8q16"},
-    {{"\113\012\015", 3}, "SwoN"},
-
-    // various lengths, generated by this python script:
-    //
-    // from std::string import lowercase as lc
-    // for i in range(27):
-    //   print '{ %2d, "%s",%s "%s" },' % (i, lc[:i], ' ' * (26-i),
-    //                                     lc[:i].encode('base64').strip())
-
-    {{"", 0}, {"", 0}},
-    {"a", "YQ=="},
-    {"ab", "YWI="},
-    {"abc", "YWJj"},
-    {"abcd", "YWJjZA=="},
-    {"abcde", "YWJjZGU="},
-    {"abcdef", "YWJjZGVm"},
-    {"abcdefg", "YWJjZGVmZw=="},
-    {"abcdefgh", "YWJjZGVmZ2g="},
-    {"abcdefghi", "YWJjZGVmZ2hp"},
-    {"abcdefghij", "YWJjZGVmZ2hpag=="},
-    {"abcdefghijk", "YWJjZGVmZ2hpams="},
-    {"abcdefghijkl", "YWJjZGVmZ2hpamts"},
-    {"abcdefghijklm", "YWJjZGVmZ2hpamtsbQ=="},
-    {"abcdefghijklmn", "YWJjZGVmZ2hpamtsbW4="},
-    {"abcdefghijklmno", "YWJjZGVmZ2hpamtsbW5v"},
-    {"abcdefghijklmnop", "YWJjZGVmZ2hpamtsbW5vcA=="},
-    {"abcdefghijklmnopq", "YWJjZGVmZ2hpamtsbW5vcHE="},
-    {"abcdefghijklmnopqr", "YWJjZGVmZ2hpamtsbW5vcHFy"},
-    {"abcdefghijklmnopqrs", "YWJjZGVmZ2hpamtsbW5vcHFycw=="},
-    {"abcdefghijklmnopqrst", "YWJjZGVmZ2hpamtsbW5vcHFyc3Q="},
-    {"abcdefghijklmnopqrstu", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1"},
-    {"abcdefghijklmnopqrstuv", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dg=="},
-    {"abcdefghijklmnopqrstuvw", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnc="},
-    {"abcdefghijklmnopqrstuvwx", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4"},
-    {"abcdefghijklmnopqrstuvwxy", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eQ=="},
-    {"abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo="},
-};
-
-template <typename StringType>
-void TestEscapeAndUnescape() {
-  // Check the short strings; this tests the math (and boundaries)
-  for (const auto& tc : base64_tests) {
-    StringType encoded("this junk should be ignored");
-    absl::Base64Escape(tc.plaintext, &encoded);
-    EXPECT_EQ(encoded, tc.cyphertext);
-    EXPECT_EQ(absl::Base64Escape(tc.plaintext), tc.cyphertext);
-
-    StringType decoded("this junk should be ignored");
-    EXPECT_TRUE(absl::Base64Unescape(encoded, &decoded));
-    EXPECT_EQ(decoded, tc.plaintext);
-
-    StringType websafe(tc.cyphertext);
-    for (int c = 0; c < websafe.size(); ++c) {
-      if ('+' == websafe[c]) websafe[c] = '-';
-      if ('/' == websafe[c]) websafe[c] = '_';
-      if ('=' == websafe[c]) {
-        websafe.resize(c);
-        break;
-      }
-    }
-
-    encoded = "this junk should be ignored";
-    absl::WebSafeBase64Escape(tc.plaintext, &encoded);
-    EXPECT_EQ(encoded, websafe);
-    EXPECT_EQ(absl::WebSafeBase64Escape(tc.plaintext), websafe);
-
-    // Let's try the string version of the decoder
-    decoded = "this junk should be ignored";
-    EXPECT_TRUE(absl::WebSafeBase64Unescape(websafe, &decoded));
-    EXPECT_EQ(decoded, tc.plaintext);
-  }
-
-  // Now try the long strings, this tests the streaming
-  for (const auto& tc : absl::strings_internal::base64_strings()) {
-    StringType buffer;
-    absl::WebSafeBase64Escape(tc.plaintext, &buffer);
-    EXPECT_EQ(tc.cyphertext, buffer);
-    EXPECT_EQ(absl::WebSafeBase64Escape(tc.plaintext), tc.cyphertext);
-  }
-
-  // Verify the behavior when decoding bad data
-  {
-    absl::string_view data_set[] = {"ab-/", absl::string_view("\0bcd", 4),
-                                    absl::string_view("abc.\0", 5)};
-    for (absl::string_view bad_data : data_set) {
-      StringType buf;
-      EXPECT_FALSE(absl::Base64Unescape(bad_data, &buf));
-      EXPECT_FALSE(absl::WebSafeBase64Unescape(bad_data, &buf));
-      EXPECT_TRUE(buf.empty());
-    }
-  }
-}
-
-TEST(Base64, EscapeAndUnescape) {
-  TestEscapeAndUnescape<std::string>();
-}
-
-TEST(Base64, DISABLED_HugeData) {
-  const size_t kSize = size_t(3) * 1000 * 1000 * 1000;
-  static_assert(kSize % 3 == 0, "kSize must be divisible by 3");
-  const std::string huge(kSize, 'x');
-
-  std::string escaped;
-  absl::Base64Escape(huge, &escaped);
-
-  // Generates the string that should match a base64 encoded "xxx..." string.
-  // "xxx" in base64 is "eHh4".
-  std::string expected_encoding;
-  expected_encoding.reserve(kSize / 3 * 4);
-  for (size_t i = 0; i < kSize / 3; ++i) {
-    expected_encoding.append("eHh4");
-  }
-  EXPECT_EQ(expected_encoding, escaped);
-
-  std::string unescaped;
-  EXPECT_TRUE(absl::Base64Unescape(escaped, &unescaped));
-  EXPECT_EQ(huge, unescaped);
-}
-
-TEST(HexAndBack, HexStringToBytes_and_BytesToHexString) {
-  std::string hex_mixed = "0123456789abcdefABCDEF";
-  std::string bytes_expected = "\x01\x23\x45\x67\x89\xab\xcd\xef\xAB\xCD\xEF";
-  std::string hex_only_lower = "0123456789abcdefabcdef";
-
-  std::string bytes_result = absl::HexStringToBytes(hex_mixed);
-  EXPECT_EQ(bytes_expected, bytes_result);
-
-  std::string prefix_valid = hex_mixed + "?";
-  std::string prefix_valid_result = absl::HexStringToBytes(
-      absl::string_view(prefix_valid.data(), prefix_valid.size() - 1));
-  EXPECT_EQ(bytes_expected, prefix_valid_result);
-
-  std::string infix_valid = "?" + hex_mixed + "???";
-  std::string infix_valid_result = absl::HexStringToBytes(
-      absl::string_view(infix_valid.data() + 1, hex_mixed.size()));
-  EXPECT_EQ(bytes_expected, infix_valid_result);
-
-  std::string hex_result = absl::BytesToHexString(bytes_expected);
-  EXPECT_EQ(hex_only_lower, hex_result);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/char_map.h b/third_party/abseil/absl/strings/internal/char_map.h
deleted file mode 100644
index 61484de..0000000
--- a/third_party/abseil/absl/strings/internal/char_map.h
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Character Map Class
-//
-// A fast, bit-vector map for 8-bit unsigned characters.
-// This class is useful for non-character purposes as well.
-
-#ifndef ABSL_STRINGS_INTERNAL_CHAR_MAP_H_
-#define ABSL_STRINGS_INTERNAL_CHAR_MAP_H_
-
-#include <cstddef>
-#include <cstdint>
-#include <cstring>
-
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-class Charmap {
- public:
-  constexpr Charmap() : m_() {}
-
-  // Initializes with a given char*.  Note that NUL is not treated as
-  // a terminator, but rather a char to be flicked.
-  Charmap(const char* str, int len) : m_() {
-    while (len--) SetChar(*str++);
-  }
-
-  // Initializes with a given char*.  NUL is treated as a terminator
-  // and will not be in the charmap.
-  explicit Charmap(const char* str) : m_() {
-    while (*str) SetChar(*str++);
-  }
-
-  constexpr bool contains(unsigned char c) const {
-    return (m_[c / 64] >> (c % 64)) & 0x1;
-  }
-
-  // Returns true if and only if a character exists in both maps.
-  bool IntersectsWith(const Charmap& c) const {
-    for (size_t i = 0; i < ABSL_ARRAYSIZE(m_); ++i) {
-      if ((m_[i] & c.m_[i]) != 0) return true;
-    }
-    return false;
-  }
-
-  bool IsZero() const {
-    for (uint64_t c : m_) {
-      if (c != 0) return false;
-    }
-    return true;
-  }
-
-  // Containing only a single specified char.
-  static constexpr Charmap Char(char x) {
-    return Charmap(CharMaskForWord(x, 0), CharMaskForWord(x, 1),
-                   CharMaskForWord(x, 2), CharMaskForWord(x, 3));
-  }
-
-  // Containing all the chars in the C-string 's'.
-  // Note that this is expensively recursive because of the C++11 constexpr
-  // formulation. Use only in constexpr initializers.
-  static constexpr Charmap FromString(const char* s) {
-    return *s == 0 ? Charmap() : (Char(*s) | FromString(s + 1));
-  }
-
-  // Containing all the chars in the closed interval [lo,hi].
-  static constexpr Charmap Range(char lo, char hi) {
-    return Charmap(RangeForWord(lo, hi, 0), RangeForWord(lo, hi, 1),
-                   RangeForWord(lo, hi, 2), RangeForWord(lo, hi, 3));
-  }
-
-  friend constexpr Charmap operator&(const Charmap& a, const Charmap& b) {
-    return Charmap(a.m_[0] & b.m_[0], a.m_[1] & b.m_[1], a.m_[2] & b.m_[2],
-                   a.m_[3] & b.m_[3]);
-  }
-
-  friend constexpr Charmap operator|(const Charmap& a, const Charmap& b) {
-    return Charmap(a.m_[0] | b.m_[0], a.m_[1] | b.m_[1], a.m_[2] | b.m_[2],
-                   a.m_[3] | b.m_[3]);
-  }
-
-  friend constexpr Charmap operator~(const Charmap& a) {
-    return Charmap(~a.m_[0], ~a.m_[1], ~a.m_[2], ~a.m_[3]);
-  }
-
- private:
-  constexpr Charmap(uint64_t b0, uint64_t b1, uint64_t b2, uint64_t b3)
-      : m_{b0, b1, b2, b3} {}
-
-  static constexpr uint64_t RangeForWord(unsigned char lo, unsigned char hi,
-                                         uint64_t word) {
-    return OpenRangeFromZeroForWord(hi + 1, word) &
-           ~OpenRangeFromZeroForWord(lo, word);
-  }
-
-  // All the chars in the specified word of the range [0, upper).
-  static constexpr uint64_t OpenRangeFromZeroForWord(uint64_t upper,
-                                                     uint64_t word) {
-    return (upper <= 64 * word)
-               ? 0
-               : (upper >= 64 * (word + 1))
-                     ? ~static_cast<uint64_t>(0)
-                     : (~static_cast<uint64_t>(0) >> (64 - upper % 64));
-  }
-
-  static constexpr uint64_t CharMaskForWord(unsigned char x, uint64_t word) {
-    return (x / 64 == word) ? (static_cast<uint64_t>(1) << (x % 64)) : 0;
-  }
-
- private:
-  void SetChar(unsigned char c) {
-    m_[c / 64] |= static_cast<uint64_t>(1) << (c % 64);
-  }
-
-  uint64_t m_[4];
-};
-
-// Mirror the char-classifying predicates in <cctype>
-constexpr Charmap UpperCharmap() { return Charmap::Range('A', 'Z'); }
-constexpr Charmap LowerCharmap() { return Charmap::Range('a', 'z'); }
-constexpr Charmap DigitCharmap() { return Charmap::Range('0', '9'); }
-constexpr Charmap AlphaCharmap() { return LowerCharmap() | UpperCharmap(); }
-constexpr Charmap AlnumCharmap() { return DigitCharmap() | AlphaCharmap(); }
-constexpr Charmap XDigitCharmap() {
-  return DigitCharmap() | Charmap::Range('A', 'F') | Charmap::Range('a', 'f');
-}
-constexpr Charmap PrintCharmap() { return Charmap::Range(0x20, 0x7e); }
-constexpr Charmap SpaceCharmap() { return Charmap::FromString("\t\n\v\f\r "); }
-constexpr Charmap CntrlCharmap() {
-  return Charmap::Range(0, 0x7f) & ~PrintCharmap();
-}
-constexpr Charmap BlankCharmap() { return Charmap::FromString("\t "); }
-constexpr Charmap GraphCharmap() { return PrintCharmap() & ~SpaceCharmap(); }
-constexpr Charmap PunctCharmap() { return GraphCharmap() & ~AlnumCharmap(); }
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_CHAR_MAP_H_
diff --git a/third_party/abseil/absl/strings/internal/char_map_benchmark.cc b/third_party/abseil/absl/strings/internal/char_map_benchmark.cc
deleted file mode 100644
index 5cef967..0000000
--- a/third_party/abseil/absl/strings/internal/char_map_benchmark.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/char_map.h"
-
-#include <cstdint>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-absl::strings_internal::Charmap MakeBenchmarkMap() {
-  absl::strings_internal::Charmap m;
-  uint32_t x[] = {0x0, 0x1, 0x2, 0x3, 0xf, 0xe, 0xd, 0xc};
-  for (uint32_t& t : x) t *= static_cast<uint32_t>(0x11111111UL);
-  for (uint32_t i = 0; i < 256; ++i) {
-    if ((x[i / 32] >> (i % 32)) & 1)
-      m = m | absl::strings_internal::Charmap::Char(i);
-  }
-  return m;
-}
-
-// Micro-benchmark for Charmap::contains.
-void BM_Contains(benchmark::State& state) {
-  // Loop-body replicated 10 times to increase time per iteration.
-  // Argument continuously changed to avoid generating common subexpressions.
-  const absl::strings_internal::Charmap benchmark_map = MakeBenchmarkMap();
-  unsigned char c = 0;
-  int ops = 0;
-  for (auto _ : state) {
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-    ops += benchmark_map.contains(c++);
-  }
-  benchmark::DoNotOptimize(ops);
-}
-BENCHMARK(BM_Contains);
-
-// We don't bother benchmarking Charmap::IsZero or Charmap::IntersectsWith;
-// their running time is data-dependent and it is not worth characterizing
-// "typical" data.
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/char_map_test.cc b/third_party/abseil/absl/strings/internal/char_map_test.cc
deleted file mode 100644
index d330624..0000000
--- a/third_party/abseil/absl/strings/internal/char_map_test.cc
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/char_map.h"
-
-#include <cctype>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-constexpr absl::strings_internal::Charmap everything_map =
-    ~absl::strings_internal::Charmap();
-constexpr absl::strings_internal::Charmap nothing_map{};
-
-TEST(Charmap, AllTests) {
-  const absl::strings_internal::Charmap also_nothing_map("", 0);
-  ASSERT_TRUE(everything_map.contains('\0'));
-  ASSERT_TRUE(!nothing_map.contains('\0'));
-  ASSERT_TRUE(!also_nothing_map.contains('\0'));
-  for (unsigned char ch = 1; ch != 0; ++ch) {
-    ASSERT_TRUE(everything_map.contains(ch));
-    ASSERT_TRUE(!nothing_map.contains(ch));
-    ASSERT_TRUE(!also_nothing_map.contains(ch));
-  }
-
-  const absl::strings_internal::Charmap symbols("&@#@^!@?", 5);
-  ASSERT_TRUE(symbols.contains('&'));
-  ASSERT_TRUE(symbols.contains('@'));
-  ASSERT_TRUE(symbols.contains('#'));
-  ASSERT_TRUE(symbols.contains('^'));
-  ASSERT_TRUE(!symbols.contains('!'));
-  ASSERT_TRUE(!symbols.contains('?'));
-  int cnt = 0;
-  for (unsigned char ch = 1; ch != 0; ++ch)
-    cnt += symbols.contains(ch);
-  ASSERT_EQ(cnt, 4);
-
-  const absl::strings_internal::Charmap lets("^abcde", 3);
-  const absl::strings_internal::Charmap lets2("fghij\0klmnop", 10);
-  const absl::strings_internal::Charmap lets3("fghij\0klmnop");
-  ASSERT_TRUE(lets2.contains('k'));
-  ASSERT_TRUE(!lets3.contains('k'));
-
-  ASSERT_TRUE(symbols.IntersectsWith(lets));
-  ASSERT_TRUE(!lets2.IntersectsWith(lets));
-  ASSERT_TRUE(lets.IntersectsWith(symbols));
-  ASSERT_TRUE(!lets.IntersectsWith(lets2));
-
-  ASSERT_TRUE(nothing_map.IsZero());
-  ASSERT_TRUE(!lets.IsZero());
-}
-
-namespace {
-std::string Members(const absl::strings_internal::Charmap& m) {
-  std::string r;
-  for (size_t i = 0; i < 256; ++i)
-    if (m.contains(i)) r.push_back(i);
-  return r;
-}
-
-std::string ClosedRangeString(unsigned char lo, unsigned char hi) {
-  // Don't depend on lo<hi. Just increment until lo==hi.
-  std::string s;
-  while (true) {
-    s.push_back(lo);
-    if (lo == hi) break;
-    ++lo;
-  }
-  return s;
-}
-
-}  // namespace
-
-TEST(Charmap, Constexpr) {
-  constexpr absl::strings_internal::Charmap kEmpty = nothing_map;
-  EXPECT_THAT(Members(kEmpty), "");
-  constexpr absl::strings_internal::Charmap kA =
-      absl::strings_internal::Charmap::Char('A');
-  EXPECT_THAT(Members(kA), "A");
-  constexpr absl::strings_internal::Charmap kAZ =
-      absl::strings_internal::Charmap::Range('A', 'Z');
-  EXPECT_THAT(Members(kAZ), "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
-  constexpr absl::strings_internal::Charmap kIdentifier =
-      absl::strings_internal::Charmap::Range('0', '9') |
-      absl::strings_internal::Charmap::Range('A', 'Z') |
-      absl::strings_internal::Charmap::Range('a', 'z') |
-      absl::strings_internal::Charmap::Char('_');
-  EXPECT_THAT(Members(kIdentifier),
-              "0123456789"
-              "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-              "_"
-              "abcdefghijklmnopqrstuvwxyz");
-  constexpr absl::strings_internal::Charmap kAll = everything_map;
-  for (size_t i = 0; i < 256; ++i) {
-    EXPECT_TRUE(kAll.contains(i)) << i;
-  }
-  constexpr absl::strings_internal::Charmap kHello =
-      absl::strings_internal::Charmap::FromString("Hello, world!");
-  EXPECT_THAT(Members(kHello), " !,Hdelorw");
-
-  // test negation and intersection
-  constexpr absl::strings_internal::Charmap kABC =
-      absl::strings_internal::Charmap::Range('A', 'Z') &
-      ~absl::strings_internal::Charmap::Range('D', 'Z');
-  EXPECT_THAT(Members(kABC), "ABC");
-}
-
-TEST(Charmap, Range) {
-  // Exhaustive testing takes too long, so test some of the boundaries that
-  // are perhaps going to cause trouble.
-  std::vector<size_t> poi = {0,   1,   2,   3,   4,   7,   8,   9,  15,
-                             16,  17,  30,  31,  32,  33,  63,  64, 65,
-                             127, 128, 129, 223, 224, 225, 254, 255};
-  for (auto lo = poi.begin(); lo != poi.end(); ++lo) {
-    SCOPED_TRACE(*lo);
-    for (auto hi = lo; hi != poi.end(); ++hi) {
-      SCOPED_TRACE(*hi);
-      EXPECT_THAT(Members(absl::strings_internal::Charmap::Range(*lo, *hi)),
-                  ClosedRangeString(*lo, *hi));
-    }
-  }
-}
-
-bool AsBool(int x) { return static_cast<bool>(x); }
-
-TEST(CharmapCtype, Match) {
-  for (int c = 0; c < 256; ++c) {
-    SCOPED_TRACE(c);
-    SCOPED_TRACE(static_cast<char>(c));
-    EXPECT_EQ(AsBool(std::isupper(c)),
-              absl::strings_internal::UpperCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::islower(c)),
-              absl::strings_internal::LowerCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isdigit(c)),
-              absl::strings_internal::DigitCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isalpha(c)),
-              absl::strings_internal::AlphaCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isalnum(c)),
-              absl::strings_internal::AlnumCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isxdigit(c)),
-              absl::strings_internal::XDigitCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isprint(c)),
-              absl::strings_internal::PrintCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isspace(c)),
-              absl::strings_internal::SpaceCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::iscntrl(c)),
-              absl::strings_internal::CntrlCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isblank(c)),
-              absl::strings_internal::BlankCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::isgraph(c)),
-              absl::strings_internal::GraphCharmap().contains(c));
-    EXPECT_EQ(AsBool(std::ispunct(c)),
-              absl::strings_internal::PunctCharmap().contains(c));
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/charconv_bigint.cc b/third_party/abseil/absl/strings/internal/charconv_bigint.cc
deleted file mode 100644
index ebf8c07..0000000
--- a/third_party/abseil/absl/strings/internal/charconv_bigint.cc
+++ /dev/null
@@ -1,359 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/charconv_bigint.h"
-
-#include <algorithm>
-#include <cassert>
-#include <string>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-namespace {
-
-// Table containing some large powers of 5, for fast computation.
-
-// Constant step size for entries in the kLargePowersOfFive table.  Each entry
-// is larger than the previous entry by a factor of 5**kLargePowerOfFiveStep
-// (or 5**27).
-//
-// In other words, the Nth entry in the table is 5**(27*N).
-//
-// 5**27 is the largest power of 5 that fits in 64 bits.
-constexpr int kLargePowerOfFiveStep = 27;
-
-// The largest legal index into the kLargePowersOfFive table.
-//
-// In other words, the largest precomputed power of 5 is 5**(27*20).
-constexpr int kLargestPowerOfFiveIndex = 20;
-
-// Table of powers of (5**27), up to (5**27)**20 == 5**540.
-//
-// Used to generate large powers of 5 while limiting the number of repeated
-// multiplications required.
-//
-// clang-format off
-const uint32_t kLargePowersOfFive[] = {
-// 5**27 (i=1), start=0, end=2
-  0xfa10079dU, 0x6765c793U,
-// 5**54 (i=2), start=2, end=6
-  0x97d9f649U, 0x6664242dU, 0x29939b14U, 0x29c30f10U,
-// 5**81 (i=3), start=6, end=12
-  0xc4f809c5U, 0x7bf3f22aU, 0x67bdae34U, 0xad340517U, 0x369d1b5fU, 0x10de1593U,
-// 5**108 (i=4), start=12, end=20
-  0x92b260d1U, 0x9efff7c7U, 0x81de0ec6U, 0xaeba5d56U, 0x410664a4U, 0x4f40737aU,
-  0x20d3846fU, 0x06d00f73U,
-// 5**135 (i=5), start=20, end=30
-  0xff1b172dU, 0x13a1d71cU, 0xefa07617U, 0x7f682d3dU, 0xff8c90c0U, 0x3f0131e7U,
-  0x3fdcb9feU, 0x917b0177U, 0x16c407a7U, 0x02c06b9dU,
-// 5**162 (i=6), start=30, end=42
-  0x960f7199U, 0x056667ecU, 0xe07aefd8U, 0x80f2b9ccU, 0x8273f5e3U, 0xeb9a214aU,
-  0x40b38005U, 0x0e477ad4U, 0x277d08e6U, 0xfa28b11eU, 0xd3f7d784U, 0x011c835bU,
-// 5**189 (i=7), start=42, end=56
-  0xf723d9d5U, 0x3282d3f3U, 0xe00857d1U, 0x69659d25U, 0x2cf117cfU, 0x24da6d07U,
-  0x954d1417U, 0x3e5d8cedU, 0x7a8bb766U, 0xfd785ae6U, 0x645436d2U, 0x40c78b34U,
-  0x94151217U, 0x0072e9f7U,
-// 5**216 (i=8), start=56, end=72
-  0x2b416aa1U, 0x7893c5a7U, 0xe37dc6d4U, 0x2bad2beaU, 0xf0fc846cU, 0x7575ae4bU,
-  0x62587b14U, 0x83b67a34U, 0x02110cdbU, 0xf7992f55U, 0x00deb022U, 0xa4a23becU,
-  0x8af5c5cdU, 0xb85b654fU, 0x818df38bU, 0x002e69d2U,
-// 5**243 (i=9), start=72, end=90
-  0x3518cbbdU, 0x20b0c15fU, 0x38756c2fU, 0xfb5dc3ddU, 0x22ad2d94U, 0xbf35a952U,
-  0xa699192aU, 0x9a613326U, 0xad2a9cedU, 0xd7f48968U, 0xe87dfb54U, 0xc8f05db6U,
-  0x5ef67531U, 0x31c1ab49U, 0xe202ac9fU, 0x9b2957b5U, 0xa143f6d3U, 0x0012bf07U,
-// 5**270 (i=10), start=90, end=110
-  0x8b971de9U, 0x21aba2e1U, 0x63944362U, 0x57172336U, 0xd9544225U, 0xfb534166U,
-  0x08c563eeU, 0x14640ee2U, 0x24e40d31U, 0x02b06537U, 0x03887f14U, 0x0285e533U,
-  0xb744ef26U, 0x8be3a6c4U, 0x266979b4U, 0x6761ece2U, 0xd9cb39e4U, 0xe67de319U,
-  0x0d39e796U, 0x00079250U,
-// 5**297 (i=11), start=110, end=132
-  0x260eb6e5U, 0xf414a796U, 0xee1a7491U, 0xdb9368ebU, 0xf50c105bU, 0x59157750U,
-  0x9ed2fb5cU, 0xf6e56d8bU, 0xeaee8d23U, 0x0f319f75U, 0x2aa134d6U, 0xac2908e9U,
-  0xd4413298U, 0x02f02a55U, 0x989d5a7aU, 0x70dde184U, 0xba8040a7U, 0x03200981U,
-  0xbe03b11cU, 0x3c1c2a18U, 0xd60427a1U, 0x00030ee0U,
-// 5**324 (i=12), start=132, end=156
-  0xce566d71U, 0xf1c4aa25U, 0x4e93ca53U, 0xa72283d0U, 0x551a73eaU, 0x3d0538e2U,
-  0x8da4303fU, 0x6a58de60U, 0x0e660221U, 0x49cf61a6U, 0x8d058fc1U, 0xb9d1a14cU,
-  0x4bab157dU, 0xc85c6932U, 0x518c8b9eU, 0x9b92b8d0U, 0x0d8a0e21U, 0xbd855df9U,
-  0xb3ea59a1U, 0x8da29289U, 0x4584d506U, 0x3752d80fU, 0xb72569c6U, 0x00013c33U,
-// 5**351 (i=13), start=156, end=182
-  0x190f354dU, 0x83695cfeU, 0xe5a4d0c7U, 0xb60fb7e8U, 0xee5bbcc4U, 0xb922054cU,
-  0xbb4f0d85U, 0x48394028U, 0x1d8957dbU, 0x0d7edb14U, 0x4ecc7587U, 0x505e9e02U,
-  0x4c87f36bU, 0x99e66bd6U, 0x44b9ed35U, 0x753037d4U, 0xe5fe5f27U, 0x2742c203U,
-  0x13b2ed2bU, 0xdc525d2cU, 0xe6fde59aU, 0x77ffb18fU, 0x13c5752cU, 0x08a84bccU,
-  0x859a4940U, 0x00007fb6U,
-// 5**378 (i=14), start=182, end=210
-  0x4f98cb39U, 0xa60edbbcU, 0x83b5872eU, 0xa501acffU, 0x9cc76f78U, 0xbadd4c73U,
-  0x43e989faU, 0xca7acf80U, 0x2e0c824fU, 0xb19f4ffcU, 0x092fd81cU, 0xe4eb645bU,
-  0xa1ff84c2U, 0x8a5a83baU, 0xa8a1fae9U, 0x1db43609U, 0xb0fed50bU, 0x0dd7d2bdU,
-  0x7d7accd8U, 0x91fa640fU, 0x37dcc6c5U, 0x1c417fd5U, 0xe4d462adU, 0xe8a43399U,
-  0x131bf9a5U, 0x8df54d29U, 0x36547dc1U, 0x00003395U,
-// 5**405 (i=15), start=210, end=240
-  0x5bd330f5U, 0x77d21967U, 0x1ac481b7U, 0x6be2f7ceU, 0x7f4792a9U, 0xe84c2c52U,
-  0x84592228U, 0x9dcaf829U, 0xdab44ce1U, 0x3d0c311bU, 0x532e297dU, 0x4704e8b4U,
-  0x9cdc32beU, 0x41e64d9dU, 0x7717bea1U, 0xa824c00dU, 0x08f50b27U, 0x0f198d77U,
-  0x49bbfdf0U, 0x025c6c69U, 0xd4e55cd3U, 0xf083602bU, 0xb9f0fecdU, 0xc0864aeaU,
-  0x9cb98681U, 0xaaf620e9U, 0xacb6df30U, 0x4faafe66U, 0x8af13c3bU, 0x000014d5U,
-// 5**432 (i=16), start=240, end=272
-  0x682bb941U, 0x89a9f297U, 0xcba75d7bU, 0x404217b1U, 0xb4e519e9U, 0xa1bc162bU,
-  0xf7f5910aU, 0x98715af5U, 0x2ff53e57U, 0xe3ef118cU, 0x490c4543U, 0xbc9b1734U,
-  0x2affbe4dU, 0x4cedcb4cU, 0xfb14e99eU, 0x35e34212U, 0xece39c24U, 0x07673ab3U,
-  0xe73115ddU, 0xd15d38e7U, 0x093eed3bU, 0xf8e7eac5U, 0x78a8cc80U, 0x25227aacU,
-  0x3f590551U, 0x413da1cbU, 0xdf643a55U, 0xab65ad44U, 0xd70b23d7U, 0xc672cd76U,
-  0x3364ea62U, 0x0000086aU,
-// 5**459 (i=17), start=272, end=306
-  0x22f163ddU, 0x23cf07acU, 0xbe2af6c2U, 0xf412f6f6U, 0xc3ff541eU, 0x6eeaf7deU,
-  0xa47047e0U, 0x408cda92U, 0x0f0eeb08U, 0x56deba9dU, 0xcfc6b090U, 0x8bbbdf04U,
-  0x3933cdb3U, 0x9e7bb67dU, 0x9f297035U, 0x38946244U, 0xee1d37bbU, 0xde898174U,
-  0x63f3559dU, 0x705b72fbU, 0x138d27d9U, 0xf8603a78U, 0x735eec44U, 0xe30987d5U,
-  0xc6d38070U, 0x9cfe548eU, 0x9ff01422U, 0x7c564aa8U, 0x91cc60baU, 0xcbc3565dU,
-  0x7550a50bU, 0x6909aeadU, 0x13234c45U, 0x00000366U,
-// 5**486 (i=18), start=306, end=342
-  0x17954989U, 0x3a7d7709U, 0x98042de5U, 0xa9011443U, 0x45e723c2U, 0x269ffd6fU,
-  0x58852a46U, 0xaaa1042aU, 0x2eee8153U, 0xb2b6c39eU, 0xaf845b65U, 0xf6c365d7U,
-  0xe4cffb2bU, 0xc840e90cU, 0xabea8abbU, 0x5c58f8d2U, 0x5c19fa3aU, 0x4670910aU,
-  0x4449f21cU, 0xefa645b3U, 0xcc427decU, 0x083c3d73U, 0x467cb413U, 0x6fe10ae4U,
-  0x3caffc72U, 0x9f8da55eU, 0x5e5c8ea7U, 0x490594bbU, 0xf0871b0bU, 0xdd89816cU,
-  0x8e931df8U, 0xe85ce1c9U, 0xcca090a5U, 0x575fa16bU, 0x6b9f106cU, 0x0000015fU,
-// 5**513 (i=19), start=342, end=380
-  0xee20d805U, 0x57bc3c07U, 0xcdea624eU, 0xd3f0f52dU, 0x9924b4f4U, 0xcf968640U,
-  0x61d41962U, 0xe87fb464U, 0xeaaf51c7U, 0x564c8b60U, 0xccda4028U, 0x529428bbU,
-  0x313a1fa8U, 0x96bd0f94U, 0x7a82ebaaU, 0xad99e7e9U, 0xf2668cd4U, 0xbe33a45eU,
-  0xfd0db669U, 0x87ee369fU, 0xd3ec20edU, 0x9c4d7db7U, 0xdedcf0d8U, 0x7cd2ca64U,
-  0xe25a6577U, 0x61003fd4U, 0xe56f54ccU, 0x10b7c748U, 0x40526e5eU, 0x7300ae87U,
-  0x5c439261U, 0x2c0ff469U, 0xbf723f12U, 0xb2379b61U, 0xbf59b4f5U, 0xc91b1c3fU,
-  0xf0046d27U, 0x0000008dU,
-// 5**540 (i=20), start=380, end=420
-  0x525c9e11U, 0xf4e0eb41U, 0xebb2895dU, 0x5da512f9U, 0x7d9b29d4U, 0x452f4edcU,
-  0x0b90bc37U, 0x341777cbU, 0x63d269afU, 0x1da77929U, 0x0a5c1826U, 0x77991898U,
-  0x5aeddf86U, 0xf853a877U, 0x538c31ccU, 0xe84896daU, 0xb7a0010bU, 0x17ef4de5U,
-  0xa52a2adeU, 0x029fd81cU, 0x987ce701U, 0x27fefd77U, 0xdb46c66fU, 0x5d301900U,
-  0x496998c0U, 0xbb6598b9U, 0x5eebb607U, 0xe547354aU, 0xdf4a2f7eU, 0xf06c4955U,
-  0x96242ffaU, 0x1775fb27U, 0xbecc58ceU, 0xebf2a53bU, 0x3eaad82aU, 0xf41137baU,
-  0x573e6fbaU, 0xfb4866b8U, 0x54002148U, 0x00000039U,
-};
-// clang-format on
-
-// Returns a pointer to the big integer data for (5**27)**i.  i must be
-// between 1 and 20, inclusive.
-const uint32_t* LargePowerOfFiveData(int i) {
-  return kLargePowersOfFive + i * (i - 1);
-}
-
-// Returns the size of the big integer data for (5**27)**i, in words.  i must be
-// between 1 and 20, inclusive.
-int LargePowerOfFiveSize(int i) { return 2 * i; }
-}  // namespace
-
-ABSL_DLL const uint32_t kFiveToNth[14] = {
-    1,     5,      25,      125,     625,      3125,      15625,
-    78125, 390625, 1953125, 9765625, 48828125, 244140625, 1220703125,
-};
-
-ABSL_DLL const uint32_t kTenToNth[10] = {
-    1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000,
-};
-
-template <int max_words>
-int BigUnsigned<max_words>::ReadFloatMantissa(const ParsedFloat& fp,
-                                              int significant_digits) {
-  SetToZero();
-  assert(fp.type == FloatType::kNumber);
-
-  if (fp.subrange_begin == nullptr) {
-    // We already exactly parsed the mantissa, so no more work is necessary.
-    words_[0] = fp.mantissa & 0xffffffffu;
-    words_[1] = fp.mantissa >> 32;
-    if (words_[1]) {
-      size_ = 2;
-    } else if (words_[0]) {
-      size_ = 1;
-    }
-    return fp.exponent;
-  }
-  int exponent_adjust =
-      ReadDigits(fp.subrange_begin, fp.subrange_end, significant_digits);
-  return fp.literal_exponent + exponent_adjust;
-}
-
-template <int max_words>
-int BigUnsigned<max_words>::ReadDigits(const char* begin, const char* end,
-                                       int significant_digits) {
-  assert(significant_digits <= Digits10() + 1);
-  SetToZero();
-
-  bool after_decimal_point = false;
-  // Discard any leading zeroes before the decimal point
-  while (begin < end && *begin == '0') {
-    ++begin;
-  }
-  int dropped_digits = 0;
-  // Discard any trailing zeroes.  These may or may not be after the decimal
-  // point.
-  while (begin < end && *std::prev(end) == '0') {
-    --end;
-    ++dropped_digits;
-  }
-  if (begin < end && *std::prev(end) == '.') {
-    // If the string ends in '.', either before or after dropping zeroes, then
-    // drop the decimal point and look for more digits to drop.
-    dropped_digits = 0;
-    --end;
-    while (begin < end && *std::prev(end) == '0') {
-      --end;
-      ++dropped_digits;
-    }
-  } else if (dropped_digits) {
-    // We dropped digits, and aren't sure if they're before or after the decimal
-    // point.  Figure that out now.
-    const char* dp = std::find(begin, end, '.');
-    if (dp != end) {
-      // The dropped trailing digits were after the decimal point, so don't
-      // count them.
-      dropped_digits = 0;
-    }
-  }
-  // Any non-fraction digits we dropped need to be accounted for in our exponent
-  // adjustment.
-  int exponent_adjust = dropped_digits;
-
-  uint32_t queued = 0;
-  int digits_queued = 0;
-  for (; begin != end && significant_digits > 0; ++begin) {
-    if (*begin == '.') {
-      after_decimal_point = true;
-      continue;
-    }
-    if (after_decimal_point) {
-      // For each fractional digit we emit in our parsed integer, adjust our
-      // decimal exponent to compensate.
-      --exponent_adjust;
-    }
-    int digit = (*begin - '0');
-    --significant_digits;
-    if (significant_digits == 0 && std::next(begin) != end &&
-        (digit == 0 || digit == 5)) {
-      // If this is the very last significant digit, but insignificant digits
-      // remain, we know that the last of those remaining significant digits is
-      // nonzero.  (If it wasn't, we would have stripped it before we got here.)
-      // So if this final digit is a 0 or 5, adjust it upward by 1.
-      //
-      // This adjustment is what allows incredibly large mantissas ending in
-      // 500000...000000000001 to correctly round up, rather than to nearest.
-      ++digit;
-    }
-    queued = 10 * queued + digit;
-    ++digits_queued;
-    if (digits_queued == kMaxSmallPowerOfTen) {
-      MultiplyBy(kTenToNth[kMaxSmallPowerOfTen]);
-      AddWithCarry(0, queued);
-      queued = digits_queued = 0;
-    }
-  }
-  // Encode any remaining digits.
-  if (digits_queued) {
-    MultiplyBy(kTenToNth[digits_queued]);
-    AddWithCarry(0, queued);
-  }
-
-  // If any insignificant digits remain, we will drop them.  But if we have not
-  // yet read the decimal point, then we have to adjust the exponent to account
-  // for the dropped digits.
-  if (begin < end && !after_decimal_point) {
-    // This call to std::find will result in a pointer either to the decimal
-    // point, or to the end of our buffer if there was none.
-    //
-    // Either way, [begin, decimal_point) will contain the set of dropped digits
-    // that require an exponent adjustment.
-    const char* decimal_point = std::find(begin, end, '.');
-    exponent_adjust += (decimal_point - begin);
-  }
-  return exponent_adjust;
-}
-
-template <int max_words>
-/* static */ BigUnsigned<max_words> BigUnsigned<max_words>::FiveToTheNth(
-    int n) {
-  BigUnsigned answer(1u);
-
-  // Seed from the table of large powers, if possible.
-  bool first_pass = true;
-  while (n >= kLargePowerOfFiveStep) {
-    int big_power =
-        std::min(n / kLargePowerOfFiveStep, kLargestPowerOfFiveIndex);
-    if (first_pass) {
-      // just copy, rather than multiplying by 1
-      std::copy(
-          LargePowerOfFiveData(big_power),
-          LargePowerOfFiveData(big_power) + LargePowerOfFiveSize(big_power),
-          answer.words_);
-      answer.size_ = LargePowerOfFiveSize(big_power);
-      first_pass = false;
-    } else {
-      answer.MultiplyBy(LargePowerOfFiveSize(big_power),
-                        LargePowerOfFiveData(big_power));
-    }
-    n -= kLargePowerOfFiveStep * big_power;
-  }
-  answer.MultiplyByFiveToTheNth(n);
-  return answer;
-}
-
-template <int max_words>
-void BigUnsigned<max_words>::MultiplyStep(int original_size,
-                                          const uint32_t* other_words,
-                                          int other_size, int step) {
-  int this_i = std::min(original_size - 1, step);
-  int other_i = step - this_i;
-
-  uint64_t this_word = 0;
-  uint64_t carry = 0;
-  for (; this_i >= 0 && other_i < other_size; --this_i, ++other_i) {
-    uint64_t product = words_[this_i];
-    product *= other_words[other_i];
-    this_word += product;
-    carry += (this_word >> 32);
-    this_word &= 0xffffffff;
-  }
-  AddWithCarry(step + 1, carry);
-  words_[step] = this_word & 0xffffffff;
-  if (this_word > 0 && size_ <= step) {
-    size_ = step + 1;
-  }
-}
-
-template <int max_words>
-std::string BigUnsigned<max_words>::ToString() const {
-  BigUnsigned<max_words> copy = *this;
-  std::string result;
-  // Build result in reverse order
-  while (copy.size() > 0) {
-    int next_digit = copy.DivMod<10>();
-    result.push_back('0' + next_digit);
-  }
-  if (result.empty()) {
-    result.push_back('0');
-  }
-  std::reverse(result.begin(), result.end());
-  return result;
-}
-
-template class BigUnsigned<4>;
-template class BigUnsigned<84>;
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/charconv_bigint.h b/third_party/abseil/absl/strings/internal/charconv_bigint.h
deleted file mode 100644
index 8f70297..0000000
--- a/third_party/abseil/absl/strings/internal/charconv_bigint.h
+++ /dev/null
@@ -1,423 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_CHARCONV_BIGINT_H_
-#define ABSL_STRINGS_INTERNAL_CHARCONV_BIGINT_H_
-
-#include <algorithm>
-#include <cstdint>
-#include <iostream>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/internal/charconv_parse.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// The largest power that 5 that can be raised to, and still fit in a uint32_t.
-constexpr int kMaxSmallPowerOfFive = 13;
-// The largest power that 10 that can be raised to, and still fit in a uint32_t.
-constexpr int kMaxSmallPowerOfTen = 9;
-
-ABSL_DLL extern const uint32_t
-    kFiveToNth[kMaxSmallPowerOfFive + 1];
-ABSL_DLL extern const uint32_t kTenToNth[kMaxSmallPowerOfTen + 1];
-
-// Large, fixed-width unsigned integer.
-//
-// Exact rounding for decimal-to-binary floating point conversion requires very
-// large integer math, but a design goal of absl::from_chars is to avoid
-// allocating memory.  The integer precision needed for decimal-to-binary
-// conversions is large but bounded, so a huge fixed-width integer class
-// suffices.
-//
-// This is an intentionally limited big integer class.  Only needed operations
-// are implemented.  All storage lives in an array data member, and all
-// arithmetic is done in-place, to avoid requiring separate storage for operand
-// and result.
-//
-// This is an internal class.  Some methods live in the .cc file, and are
-// instantiated only for the values of max_words we need.
-template <int max_words>
-class BigUnsigned {
- public:
-  static_assert(max_words == 4 || max_words == 84,
-                "unsupported max_words value");
-
-  BigUnsigned() : size_(0), words_{} {}
-  explicit constexpr BigUnsigned(uint64_t v)
-      : size_((v >> 32) ? 2 : v ? 1 : 0),
-        words_{static_cast<uint32_t>(v & 0xffffffffu),
-               static_cast<uint32_t>(v >> 32)} {}
-
-  // Constructs a BigUnsigned from the given string_view containing a decimal
-  // value.  If the input string is not a decimal integer, constructs a 0
-  // instead.
-  explicit BigUnsigned(absl::string_view sv) : size_(0), words_{} {
-    // Check for valid input, returning a 0 otherwise.  This is reasonable
-    // behavior only because this constructor is for unit tests.
-    if (std::find_if_not(sv.begin(), sv.end(), ascii_isdigit) != sv.end() ||
-        sv.empty()) {
-      return;
-    }
-    int exponent_adjust =
-        ReadDigits(sv.data(), sv.data() + sv.size(), Digits10() + 1);
-    if (exponent_adjust > 0) {
-      MultiplyByTenToTheNth(exponent_adjust);
-    }
-  }
-
-  // Loads the mantissa value of a previously-parsed float.
-  //
-  // Returns the associated decimal exponent.  The value of the parsed float is
-  // exactly *this * 10**exponent.
-  int ReadFloatMantissa(const ParsedFloat& fp, int significant_digits);
-
-  // Returns the number of decimal digits of precision this type provides.  All
-  // numbers with this many decimal digits or fewer are representable by this
-  // type.
-  //
-  // Analagous to std::numeric_limits<BigUnsigned>::digits10.
-  static constexpr int Digits10() {
-    // 9975007/1035508 is very slightly less than log10(2**32).
-    return static_cast<uint64_t>(max_words) * 9975007 / 1035508;
-  }
-
-  // Shifts left by the given number of bits.
-  void ShiftLeft(int count) {
-    if (count > 0) {
-      const int word_shift = count / 32;
-      if (word_shift >= max_words) {
-        SetToZero();
-        return;
-      }
-      size_ = (std::min)(size_ + word_shift, max_words);
-      count %= 32;
-      if (count == 0) {
-        std::copy_backward(words_, words_ + size_ - word_shift, words_ + size_);
-      } else {
-        for (int i = (std::min)(size_, max_words - 1); i > word_shift; --i) {
-          words_[i] = (words_[i - word_shift] << count) |
-                      (words_[i - word_shift - 1] >> (32 - count));
-        }
-        words_[word_shift] = words_[0] << count;
-        // Grow size_ if necessary.
-        if (size_ < max_words && words_[size_]) {
-          ++size_;
-        }
-      }
-      std::fill(words_, words_ + word_shift, 0u);
-    }
-  }
-
-
-  // Multiplies by v in-place.
-  void MultiplyBy(uint32_t v) {
-    if (size_ == 0 || v == 1) {
-      return;
-    }
-    if (v == 0) {
-      SetToZero();
-      return;
-    }
-    const uint64_t factor = v;
-    uint64_t window = 0;
-    for (int i = 0; i < size_; ++i) {
-      window += factor * words_[i];
-      words_[i] = window & 0xffffffff;
-      window >>= 32;
-    }
-    // If carry bits remain and there's space for them, grow size_.
-    if (window && size_ < max_words) {
-      words_[size_] = window & 0xffffffff;
-      ++size_;
-    }
-  }
-
-  void MultiplyBy(uint64_t v) {
-    uint32_t words[2];
-    words[0] = static_cast<uint32_t>(v);
-    words[1] = static_cast<uint32_t>(v >> 32);
-    if (words[1] == 0) {
-      MultiplyBy(words[0]);
-    } else {
-      MultiplyBy(2, words);
-    }
-  }
-
-  // Multiplies in place by 5 to the power of n.  n must be non-negative.
-  void MultiplyByFiveToTheNth(int n) {
-    while (n >= kMaxSmallPowerOfFive) {
-      MultiplyBy(kFiveToNth[kMaxSmallPowerOfFive]);
-      n -= kMaxSmallPowerOfFive;
-    }
-    if (n > 0) {
-      MultiplyBy(kFiveToNth[n]);
-    }
-  }
-
-  // Multiplies in place by 10 to the power of n.  n must be non-negative.
-  void MultiplyByTenToTheNth(int n) {
-    if (n > kMaxSmallPowerOfTen) {
-      // For large n, raise to a power of 5, then shift left by the same amount.
-      // (10**n == 5**n * 2**n.)  This requires fewer multiplications overall.
-      MultiplyByFiveToTheNth(n);
-      ShiftLeft(n);
-    } else if (n > 0) {
-      // We can do this more quickly for very small N by using a single
-      // multiplication.
-      MultiplyBy(kTenToNth[n]);
-    }
-  }
-
-  // Returns the value of 5**n, for non-negative n.  This implementation uses
-  // a lookup table, and is faster then seeding a BigUnsigned with 1 and calling
-  // MultiplyByFiveToTheNth().
-  static BigUnsigned FiveToTheNth(int n);
-
-  // Multiplies by another BigUnsigned, in-place.
-  template <int M>
-  void MultiplyBy(const BigUnsigned<M>& other) {
-    MultiplyBy(other.size(), other.words());
-  }
-
-  void SetToZero() {
-    std::fill(words_, words_ + size_, 0u);
-    size_ = 0;
-  }
-
-  // Returns the value of the nth word of this BigUnsigned.  This is
-  // range-checked, and returns 0 on out-of-bounds accesses.
-  uint32_t GetWord(int index) const {
-    if (index < 0 || index >= size_) {
-      return 0;
-    }
-    return words_[index];
-  }
-
-  // Returns this integer as a decimal string.  This is not used in the decimal-
-  // to-binary conversion; it is intended to aid in testing.
-  std::string ToString() const;
-
-  int size() const { return size_; }
-  const uint32_t* words() const { return words_; }
-
- private:
-  // Reads the number between [begin, end), possibly containing a decimal point,
-  // into this BigUnsigned.
-  //
-  // Callers are required to ensure [begin, end) contains a valid number, with
-  // one or more decimal digits and at most one decimal point.  This routine
-  // will behave unpredictably if these preconditions are not met.
-  //
-  // Only the first `significant_digits` digits are read.  Digits beyond this
-  // limit are "sticky": If the final significant digit is 0 or 5, and if any
-  // dropped digit is nonzero, then that final significant digit is adjusted up
-  // to 1 or 6.  This adjustment allows for precise rounding.
-  //
-  // Returns `exponent_adjustment`, a power-of-ten exponent adjustment to
-  // account for the decimal point and for dropped significant digits.  After
-  // this function returns,
-  //   actual_value_of_parsed_string ~= *this * 10**exponent_adjustment.
-  int ReadDigits(const char* begin, const char* end, int significant_digits);
-
-  // Performs a step of big integer multiplication.  This computes the full
-  // (64-bit-wide) values that should be added at the given index (step), and
-  // adds to that location in-place.
-  //
-  // Because our math all occurs in place, we must multiply starting from the
-  // highest word working downward.  (This is a bit more expensive due to the
-  // extra carries involved.)
-  //
-  // This must be called in steps, for each word to be calculated, starting from
-  // the high end and working down to 0.  The first value of `step` should be
-  //   `std::min(original_size + other.size_ - 2, max_words - 1)`.
-  // The reason for this expression is that multiplying the i'th word from one
-  // multiplicand and the j'th word of another multiplicand creates a
-  // two-word-wide value to be stored at the (i+j)'th element.  The highest
-  // word indices we will access are `original_size - 1` from this object, and
-  // `other.size_ - 1` from our operand.  Therefore,
-  // `original_size + other.size_ - 2` is the first step we should calculate,
-  // but limited on an upper bound by max_words.
-
-  // Working from high-to-low ensures that we do not overwrite the portions of
-  // the initial value of *this which are still needed for later steps.
-  //
-  // Once called with step == 0, *this contains the result of the
-  // multiplication.
-  //
-  // `original_size` is the size_ of *this before the first call to
-  // MultiplyStep().  `other_words` and `other_size` are the contents of our
-  // operand.  `step` is the step to perform, as described above.
-  void MultiplyStep(int original_size, const uint32_t* other_words,
-                    int other_size, int step);
-
-  void MultiplyBy(int other_size, const uint32_t* other_words) {
-    const int original_size = size_;
-    const int first_step =
-        (std::min)(original_size + other_size - 2, max_words - 1);
-    for (int step = first_step; step >= 0; --step) {
-      MultiplyStep(original_size, other_words, other_size, step);
-    }
-  }
-
-  // Adds a 32-bit value to the index'th word, with carry.
-  void AddWithCarry(int index, uint32_t value) {
-    if (value) {
-      while (index < max_words && value > 0) {
-        words_[index] += value;
-        // carry if we overflowed in this word:
-        if (value > words_[index]) {
-          value = 1;
-          ++index;
-        } else {
-          value = 0;
-        }
-      }
-      size_ = (std::min)(max_words, (std::max)(index + 1, size_));
-    }
-  }
-
-  void AddWithCarry(int index, uint64_t value) {
-    if (value && index < max_words) {
-      uint32_t high = value >> 32;
-      uint32_t low = value & 0xffffffff;
-      words_[index] += low;
-      if (words_[index] < low) {
-        ++high;
-        if (high == 0) {
-          // Carry from the low word caused our high word to overflow.
-          // Short circuit here to do the right thing.
-          AddWithCarry(index + 2, static_cast<uint32_t>(1));
-          return;
-        }
-      }
-      if (high > 0) {
-        AddWithCarry(index + 1, high);
-      } else {
-        // Normally 32-bit AddWithCarry() sets size_, but since we don't call
-        // it when `high` is 0, do it ourselves here.
-        size_ = (std::min)(max_words, (std::max)(index + 1, size_));
-      }
-    }
-  }
-
-  // Divide this in place by a constant divisor.  Returns the remainder of the
-  // division.
-  template <uint32_t divisor>
-  uint32_t DivMod() {
-    uint64_t accumulator = 0;
-    for (int i = size_ - 1; i >= 0; --i) {
-      accumulator <<= 32;
-      accumulator += words_[i];
-      // accumulator / divisor will never overflow an int32_t in this loop
-      words_[i] = static_cast<uint32_t>(accumulator / divisor);
-      accumulator = accumulator % divisor;
-    }
-    while (size_ > 0 && words_[size_ - 1] == 0) {
-      --size_;
-    }
-    return static_cast<uint32_t>(accumulator);
-  }
-
-  // The number of elements in words_ that may carry significant values.
-  // All elements beyond this point are 0.
-  //
-  // When size_ is 0, this BigUnsigned stores the value 0.
-  // When size_ is nonzero, is *not* guaranteed that words_[size_ - 1] is
-  // nonzero.  This can occur due to overflow truncation.
-  // In particular, x.size_ != y.size_ does *not* imply x != y.
-  int size_;
-  uint32_t words_[max_words];
-};
-
-// Compares two big integer instances.
-//
-// Returns -1 if lhs < rhs, 0 if lhs == rhs, and 1 if lhs > rhs.
-template <int N, int M>
-int Compare(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  int limit = (std::max)(lhs.size(), rhs.size());
-  for (int i = limit - 1; i >= 0; --i) {
-    const uint32_t lhs_word = lhs.GetWord(i);
-    const uint32_t rhs_word = rhs.GetWord(i);
-    if (lhs_word < rhs_word) {
-      return -1;
-    } else if (lhs_word > rhs_word) {
-      return 1;
-    }
-  }
-  return 0;
-}
-
-template <int N, int M>
-bool operator==(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  int limit = (std::max)(lhs.size(), rhs.size());
-  for (int i = 0; i < limit; ++i) {
-    if (lhs.GetWord(i) != rhs.GetWord(i)) {
-      return false;
-    }
-  }
-  return true;
-}
-
-template <int N, int M>
-bool operator!=(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  return !(lhs == rhs);
-}
-
-template <int N, int M>
-bool operator<(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  return Compare(lhs, rhs) == -1;
-}
-
-template <int N, int M>
-bool operator>(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  return rhs < lhs;
-}
-template <int N, int M>
-bool operator<=(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  return !(rhs < lhs);
-}
-template <int N, int M>
-bool operator>=(const BigUnsigned<N>& lhs, const BigUnsigned<M>& rhs) {
-  return !(lhs < rhs);
-}
-
-// Output operator for BigUnsigned, for testing purposes only.
-template <int N>
-std::ostream& operator<<(std::ostream& os, const BigUnsigned<N>& num) {
-  return os << num.ToString();
-}
-
-// Explicit instantiation declarations for the sizes of BigUnsigned that we
-// are using.
-//
-// For now, the choices of 4 and 84 are arbitrary; 4 is a small value that is
-// still bigger than an int128, and 84 is a large value we will want to use
-// in the from_chars implementation.
-//
-// Comments justifying the use of 84 belong in the from_chars implementation,
-// and will be added in a follow-up CL.
-extern template class BigUnsigned<4>;
-extern template class BigUnsigned<84>;
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_CHARCONV_BIGINT_H_
diff --git a/third_party/abseil/absl/strings/internal/charconv_bigint_test.cc b/third_party/abseil/absl/strings/internal/charconv_bigint_test.cc
deleted file mode 100644
index a8b9945..0000000
--- a/third_party/abseil/absl/strings/internal/charconv_bigint_test.cc
+++ /dev/null
@@ -1,260 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/charconv_bigint.h"
-
-#include <string>
-
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-TEST(BigUnsigned, ShiftLeft) {
-  {
-    // Check that 3 * 2**100 is calculated correctly
-    BigUnsigned<4> num(3u);
-    num.ShiftLeft(100);
-    EXPECT_EQ(num, BigUnsigned<4>("3802951800684688204490109616128"));
-  }
-  {
-    // Test that overflow is truncated properly.
-    // 15 is 4 bits long, and BigUnsigned<4> is a 128-bit bigint.
-    // Shifting left by 125 bits should truncate off the high bit, so that
-    //   15 << 125 == 7 << 125
-    // after truncation.
-    BigUnsigned<4> a(15u);
-    BigUnsigned<4> b(7u);
-    BigUnsigned<4> c(3u);
-    a.ShiftLeft(125);
-    b.ShiftLeft(125);
-    c.ShiftLeft(125);
-    EXPECT_EQ(a, b);
-    EXPECT_NE(a, c);
-  }
-  {
-    // Same test, larger bigint:
-    BigUnsigned<84> a(15u);
-    BigUnsigned<84> b(7u);
-    BigUnsigned<84> c(3u);
-    a.ShiftLeft(84 * 32 - 3);
-    b.ShiftLeft(84 * 32 - 3);
-    c.ShiftLeft(84 * 32 - 3);
-    EXPECT_EQ(a, b);
-    EXPECT_NE(a, c);
-  }
-  {
-    // Check that incrementally shifting has the same result as doing it all at
-    // once (attempting to capture corner cases.)
-    const std::string seed = "1234567890123456789012345678901234567890";
-    BigUnsigned<84> a(seed);
-    for (int i = 1; i <= 84 * 32; ++i) {
-      a.ShiftLeft(1);
-      BigUnsigned<84> b(seed);
-      b.ShiftLeft(i);
-      EXPECT_EQ(a, b);
-    }
-    // And we should have fully rotated all bits off by now:
-    EXPECT_EQ(a, BigUnsigned<84>(0u));
-  }
-  {
-    // Bit shifting large and small numbers by large and small offsets.
-    // Intended to exercise bounds-checking corner on ShiftLeft() (directly
-    // and under asan).
-
-    // 2**(32*84)-1
-    const BigUnsigned<84> all_bits_one(
-        "1474444211396924248063325089479706787923460402125687709454567433186613"
-        "6228083464060749874845919674257665016359189106695900028098437021384227"
-        "3285029708032466536084583113729486015826557532750465299832071590813090"
-        "2011853039837649252477307070509704043541368002938784757296893793903797"
-        "8180292336310543540677175225040919704702800559606097685920595947397024"
-        "8303316808753252115729411497720357971050627997031988036134171378490368"
-        "6008000778741115399296162550786288457245180872759047016734959330367829"
-        "5235612397427686310674725251378116268607113017720538636924549612987647"
-        "5767411074510311386444547332882472126067840027882117834454260409440463"
-        "9345147252664893456053258463203120637089916304618696601333953616715125"
-        "2115882482473279040772264257431663818610405673876655957323083702713344"
-        "4201105427930770976052393421467136557055");
-    const BigUnsigned<84> zero(0u);
-    const BigUnsigned<84> one(1u);
-    // in bounds shifts
-    for (int i = 1; i < 84*32; ++i) {
-      // shifting all_bits_one to the left should result in a smaller number,
-      // since the high bits rotate off and the low bits are replaced with
-      // zeroes.
-      BigUnsigned<84> big_shifted = all_bits_one;
-      big_shifted.ShiftLeft(i);
-      EXPECT_GT(all_bits_one, big_shifted);
-      // Shifting 1 to the left should instead result in a larger number.
-      BigUnsigned<84> small_shifted = one;
-      small_shifted.ShiftLeft(i);
-      EXPECT_LT(one, small_shifted);
-    }
-    // Shifting by zero or a negative number has no effect
-    for (int no_op_shift : {0, -1, -84 * 32, std::numeric_limits<int>::min()}) {
-      BigUnsigned<84> big_shifted = all_bits_one;
-      big_shifted.ShiftLeft(no_op_shift);
-      EXPECT_EQ(all_bits_one, big_shifted);
-      BigUnsigned<84> small_shifted = one;
-      big_shifted.ShiftLeft(no_op_shift);
-      EXPECT_EQ(one, small_shifted);
-    }
-    // Shifting by an amount greater than the number of bits should result in
-    // zero.
-    for (int out_of_bounds_shift :
-         {84 * 32, 84 * 32 + 1, std::numeric_limits<int>::max()}) {
-      BigUnsigned<84> big_shifted = all_bits_one;
-      big_shifted.ShiftLeft(out_of_bounds_shift);
-      EXPECT_EQ(zero, big_shifted);
-      BigUnsigned<84> small_shifted = one;
-      small_shifted.ShiftLeft(out_of_bounds_shift);
-      EXPECT_EQ(zero, small_shifted);
-    }
-  }
-}
-
-TEST(BigUnsigned, MultiplyByUint32) {
-  const BigUnsigned<84> factorial_100(
-      "933262154439441526816992388562667004907159682643816214685929638952175999"
-      "932299156089414639761565182862536979208272237582511852109168640000000000"
-      "00000000000000");
-  BigUnsigned<84> a(1u);
-  for (uint32_t i = 1; i <= 100; ++i) {
-    a.MultiplyBy(i);
-  }
-  EXPECT_EQ(a, BigUnsigned<84>(factorial_100));
-}
-
-TEST(BigUnsigned, MultiplyByBigUnsigned) {
-  {
-    // Put the terms of factorial_200 into two bigints, and multiply them
-    // together.
-    const BigUnsigned<84> factorial_200(
-        "7886578673647905035523632139321850622951359776871732632947425332443594"
-        "4996340334292030428401198462390417721213891963883025764279024263710506"
-        "1926624952829931113462857270763317237396988943922445621451664240254033"
-        "2918641312274282948532775242424075739032403212574055795686602260319041"
-        "7032406235170085879617892222278962370389737472000000000000000000000000"
-        "0000000000000000000000000");
-    BigUnsigned<84> evens(1u);
-    BigUnsigned<84> odds(1u);
-    for (uint32_t i = 1; i < 200; i += 2) {
-      odds.MultiplyBy(i);
-      evens.MultiplyBy(i + 1);
-    }
-    evens.MultiplyBy(odds);
-    EXPECT_EQ(evens, factorial_200);
-  }
-  {
-    // Multiply various powers of 10 together.
-    for (int a = 0 ; a < 700; a += 25) {
-      SCOPED_TRACE(a);
-      BigUnsigned<84> a_value("3" + std::string(a, '0'));
-      for (int b = 0; b < (700 - a); b += 25) {
-        SCOPED_TRACE(b);
-        BigUnsigned<84> b_value("2" + std::string(b, '0'));
-        BigUnsigned<84> expected_product("6" + std::string(a + b, '0'));
-        b_value.MultiplyBy(a_value);
-        EXPECT_EQ(b_value, expected_product);
-      }
-    }
-  }
-}
-
-TEST(BigUnsigned, MultiplyByOverflow) {
-  {
-    // Check that multiplcation overflow predictably truncates.
-
-    // A big int with all bits on.
-    BigUnsigned<4> all_bits_on("340282366920938463463374607431768211455");
-    // Modulo 2**128, this is equal to -1.  Therefore the square of this,
-    // modulo 2**128, should be 1.
-    all_bits_on.MultiplyBy(all_bits_on);
-    EXPECT_EQ(all_bits_on, BigUnsigned<4>(1u));
-  }
-  {
-    // Try multiplying a large bigint by 2**50, and compare the result to
-    // shifting.
-    BigUnsigned<4> value_1("12345678901234567890123456789012345678");
-    BigUnsigned<4> value_2("12345678901234567890123456789012345678");
-    BigUnsigned<4> two_to_fiftieth(1u);
-    two_to_fiftieth.ShiftLeft(50);
-
-    value_1.ShiftLeft(50);
-    value_2.MultiplyBy(two_to_fiftieth);
-    EXPECT_EQ(value_1, value_2);
-  }
-}
-
-TEST(BigUnsigned, FiveToTheNth) {
-  {
-    // Sanity check that MultiplyByFiveToTheNth gives consistent answers, up to
-    // and including overflow.
-    for (int i = 0; i < 1160; ++i) {
-      SCOPED_TRACE(i);
-      BigUnsigned<84> value_1(123u);
-      BigUnsigned<84> value_2(123u);
-      value_1.MultiplyByFiveToTheNth(i);
-      for (int j = 0; j < i; j++) {
-        value_2.MultiplyBy(5u);
-      }
-      EXPECT_EQ(value_1, value_2);
-    }
-  }
-  {
-    // Check that the faster, table-lookup-based static method returns the same
-    // result that multiplying in-place would return, up to and including
-    // overflow.
-    for (int i = 0; i < 1160; ++i) {
-      SCOPED_TRACE(i);
-      BigUnsigned<84> value_1(1u);
-      value_1.MultiplyByFiveToTheNth(i);
-      BigUnsigned<84> value_2 = BigUnsigned<84>::FiveToTheNth(i);
-      EXPECT_EQ(value_1, value_2);
-    }
-  }
-}
-
-TEST(BigUnsigned, TenToTheNth) {
-  {
-    // Sanity check MultiplyByTenToTheNth.
-    for (int i = 0; i < 800; ++i) {
-      SCOPED_TRACE(i);
-      BigUnsigned<84> value_1(123u);
-      BigUnsigned<84> value_2(123u);
-      value_1.MultiplyByTenToTheNth(i);
-      for (int j = 0; j < i; j++) {
-        value_2.MultiplyBy(10u);
-      }
-      EXPECT_EQ(value_1, value_2);
-    }
-  }
-  {
-    // Alternate testing approach, taking advantage of the decimal parser.
-    for (int i = 0; i < 200; ++i) {
-      SCOPED_TRACE(i);
-      BigUnsigned<84> value_1(135u);
-      value_1.MultiplyByTenToTheNth(i);
-      BigUnsigned<84> value_2("135" + std::string(i, '0'));
-      EXPECT_EQ(value_1, value_2);
-    }
-  }
-}
-
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/charconv_parse.cc b/third_party/abseil/absl/strings/internal/charconv_parse.cc
deleted file mode 100644
index 8b11868..0000000
--- a/third_party/abseil/absl/strings/internal/charconv_parse.cc
+++ /dev/null
@@ -1,504 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/charconv_parse.h"
-#include "absl/strings/charconv.h"
-
-#include <cassert>
-#include <cstdint>
-#include <limits>
-
-#include "absl/strings/internal/memutil.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-// ParseFloat<10> will read the first 19 significant digits of the mantissa.
-// This number was chosen for multiple reasons.
-//
-// (a) First, for whatever integer type we choose to represent the mantissa, we
-// want to choose the largest possible number of decimal digits for that integer
-// type.  We are using uint64_t, which can express any 19-digit unsigned
-// integer.
-//
-// (b) Second, we need to parse enough digits that the binary value of any
-// mantissa we capture has more bits of resolution than the mantissa
-// representation in the target float.  Our algorithm requires at least 3 bits
-// of headway, but 19 decimal digits give a little more than that.
-//
-// The following static assertions verify the above comments:
-constexpr int kDecimalMantissaDigitsMax = 19;
-
-static_assert(std::numeric_limits<uint64_t>::digits10 ==
-                  kDecimalMantissaDigitsMax,
-              "(a) above");
-
-// IEEE doubles, which we assume in Abseil, have 53 binary bits of mantissa.
-static_assert(std::numeric_limits<double>::is_iec559, "IEEE double assumed");
-static_assert(std::numeric_limits<double>::radix == 2, "IEEE double fact");
-static_assert(std::numeric_limits<double>::digits == 53, "IEEE double fact");
-
-// The lowest valued 19-digit decimal mantissa we can read still contains
-// sufficient information to reconstruct a binary mantissa.
-static_assert(1000000000000000000u > (uint64_t(1) << (53 + 3)), "(b) above");
-
-// ParseFloat<16> will read the first 15 significant digits of the mantissa.
-//
-// Because a base-16-to-base-2 conversion can be done exactly, we do not need
-// to maximize the number of scanned hex digits to improve our conversion.  What
-// is required is to scan two more bits than the mantissa can represent, so that
-// we always round correctly.
-//
-// (One extra bit does not suffice to perform correct rounding, since a number
-// exactly halfway between two representable floats has unique rounding rules,
-// so we need to differentiate between a "halfway between" number and a "closer
-// to the larger value" number.)
-constexpr int kHexadecimalMantissaDigitsMax = 15;
-
-// The minimum number of significant bits that will be read from
-// kHexadecimalMantissaDigitsMax hex digits.  We must subtract by three, since
-// the most significant digit can be a "1", which only contributes a single
-// significant bit.
-constexpr int kGuaranteedHexadecimalMantissaBitPrecision =
-    4 * kHexadecimalMantissaDigitsMax - 3;
-
-static_assert(kGuaranteedHexadecimalMantissaBitPrecision >
-                  std::numeric_limits<double>::digits + 2,
-              "kHexadecimalMantissaDigitsMax too small");
-
-// We also impose a limit on the number of significant digits we will read from
-// an exponent, to avoid having to deal with integer overflow.  We use 9 for
-// this purpose.
-//
-// If we read a 9 digit exponent, the end result of the conversion will
-// necessarily be infinity or zero, depending on the sign of the exponent.
-// Therefore we can just drop extra digits on the floor without any extra
-// logic.
-constexpr int kDecimalExponentDigitsMax = 9;
-static_assert(std::numeric_limits<int>::digits10 >= kDecimalExponentDigitsMax,
-              "int type too small");
-
-// To avoid incredibly large inputs causing integer overflow for our exponent,
-// we impose an arbitrary but very large limit on the number of significant
-// digits we will accept.  The implementation refuses to match a string with
-// more consecutive significant mantissa digits than this.
-constexpr int kDecimalDigitLimit = 50000000;
-
-// Corresponding limit for hexadecimal digit inputs.  This is one fourth the
-// amount of kDecimalDigitLimit, since each dropped hexadecimal digit requires
-// a binary exponent adjustment of 4.
-constexpr int kHexadecimalDigitLimit = kDecimalDigitLimit / 4;
-
-// The largest exponent we can read is 999999999 (per
-// kDecimalExponentDigitsMax), and the largest exponent adjustment we can get
-// from dropped mantissa digits is 2 * kDecimalDigitLimit, and the sum of these
-// comfortably fits in an integer.
-//
-// We count kDecimalDigitLimit twice because there are independent limits for
-// numbers before and after the decimal point.  (In the case where there are no
-// significant digits before the decimal point, there are independent limits for
-// post-decimal-point leading zeroes and for significant digits.)
-static_assert(999999999 + 2 * kDecimalDigitLimit <
-                  std::numeric_limits<int>::max(),
-              "int type too small");
-static_assert(999999999 + 2 * (4 * kHexadecimalDigitLimit) <
-                  std::numeric_limits<int>::max(),
-              "int type too small");
-
-// Returns true if the provided bitfield allows parsing an exponent value
-// (e.g., "1.5e100").
-bool AllowExponent(chars_format flags) {
-  bool fixed = (flags & chars_format::fixed) == chars_format::fixed;
-  bool scientific =
-      (flags & chars_format::scientific) == chars_format::scientific;
-  return scientific || !fixed;
-}
-
-// Returns true if the provided bitfield requires an exponent value be present.
-bool RequireExponent(chars_format flags) {
-  bool fixed = (flags & chars_format::fixed) == chars_format::fixed;
-  bool scientific =
-      (flags & chars_format::scientific) == chars_format::scientific;
-  return scientific && !fixed;
-}
-
-const int8_t kAsciiToInt[256] = {
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0,  1,  2,  3,  4,  5,  6,  7,  8,
-    9,  -1, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-    -1, -1, -1, -1, -1, -1, -1, -1, -1};
-
-// Returns true if `ch` is a digit in the given base
-template <int base>
-bool IsDigit(char ch);
-
-// Converts a valid `ch` to its digit value in the given base.
-template <int base>
-unsigned ToDigit(char ch);
-
-// Returns true if `ch` is the exponent delimiter for the given base.
-template <int base>
-bool IsExponentCharacter(char ch);
-
-// Returns the maximum number of significant digits we will read for a float
-// in the given base.
-template <int base>
-constexpr int MantissaDigitsMax();
-
-// Returns the largest consecutive run of digits we will accept when parsing a
-// number in the given base.
-template <int base>
-constexpr int DigitLimit();
-
-// Returns the amount the exponent must be adjusted by for each dropped digit.
-// (For decimal this is 1, since the digits are in base 10 and the exponent base
-// is also 10, but for hexadecimal this is 4, since the digits are base 16 but
-// the exponent base is 2.)
-template <int base>
-constexpr int DigitMagnitude();
-
-template <>
-bool IsDigit<10>(char ch) {
-  return ch >= '0' && ch <= '9';
-}
-template <>
-bool IsDigit<16>(char ch) {
-  return kAsciiToInt[static_cast<unsigned char>(ch)] >= 0;
-}
-
-template <>
-unsigned ToDigit<10>(char ch) {
-  return ch - '0';
-}
-template <>
-unsigned ToDigit<16>(char ch) {
-  return kAsciiToInt[static_cast<unsigned char>(ch)];
-}
-
-template <>
-bool IsExponentCharacter<10>(char ch) {
-  return ch == 'e' || ch == 'E';
-}
-
-template <>
-bool IsExponentCharacter<16>(char ch) {
-  return ch == 'p' || ch == 'P';
-}
-
-template <>
-constexpr int MantissaDigitsMax<10>() {
-  return kDecimalMantissaDigitsMax;
-}
-template <>
-constexpr int MantissaDigitsMax<16>() {
-  return kHexadecimalMantissaDigitsMax;
-}
-
-template <>
-constexpr int DigitLimit<10>() {
-  return kDecimalDigitLimit;
-}
-template <>
-constexpr int DigitLimit<16>() {
-  return kHexadecimalDigitLimit;
-}
-
-template <>
-constexpr int DigitMagnitude<10>() {
-  return 1;
-}
-template <>
-constexpr int DigitMagnitude<16>() {
-  return 4;
-}
-
-// Reads decimal digits from [begin, end) into *out.  Returns the number of
-// digits consumed.
-//
-// After max_digits has been read, keeps consuming characters, but no longer
-// adjusts *out.  If a nonzero digit is dropped this way, *dropped_nonzero_digit
-// is set; otherwise, it is left unmodified.
-//
-// If no digits are matched, returns 0 and leaves *out unchanged.
-//
-// ConsumeDigits does not protect against overflow on *out; max_digits must
-// be chosen with respect to type T to avoid the possibility of overflow.
-template <int base, typename T>
-int ConsumeDigits(const char* begin, const char* end, int max_digits, T* out,
-                  bool* dropped_nonzero_digit) {
-  if (base == 10) {
-    assert(max_digits <= std::numeric_limits<T>::digits10);
-  } else if (base == 16) {
-    assert(max_digits * 4 <= std::numeric_limits<T>::digits);
-  }
-  const char* const original_begin = begin;
-
-  // Skip leading zeros, but only if *out is zero.
-  // They don't cause an overflow so we don't have to count them for
-  // `max_digits`.
-  while (!*out && end != begin && *begin == '0') ++begin;
-
-  T accumulator = *out;
-  const char* significant_digits_end =
-      (end - begin > max_digits) ? begin + max_digits : end;
-  while (begin < significant_digits_end && IsDigit<base>(*begin)) {
-    // Do not guard against *out overflow; max_digits was chosen to avoid this.
-    // Do assert against it, to detect problems in debug builds.
-    auto digit = static_cast<T>(ToDigit<base>(*begin));
-    assert(accumulator * base >= accumulator);
-    accumulator *= base;
-    assert(accumulator + digit >= accumulator);
-    accumulator += digit;
-    ++begin;
-  }
-  bool dropped_nonzero = false;
-  while (begin < end && IsDigit<base>(*begin)) {
-    dropped_nonzero = dropped_nonzero || (*begin != '0');
-    ++begin;
-  }
-  if (dropped_nonzero && dropped_nonzero_digit != nullptr) {
-    *dropped_nonzero_digit = true;
-  }
-  *out = accumulator;
-  return static_cast<int>(begin - original_begin);
-}
-
-// Returns true if `v` is one of the chars allowed inside parentheses following
-// a NaN.
-bool IsNanChar(char v) {
-  return (v == '_') || (v >= '0' && v <= '9') || (v >= 'a' && v <= 'z') ||
-         (v >= 'A' && v <= 'Z');
-}
-
-// Checks the range [begin, end) for a strtod()-formatted infinity or NaN.  If
-// one is found, sets `out` appropriately and returns true.
-bool ParseInfinityOrNan(const char* begin, const char* end,
-                        strings_internal::ParsedFloat* out) {
-  if (end - begin < 3) {
-    return false;
-  }
-  switch (*begin) {
-    case 'i':
-    case 'I': {
-      // An infinity string consists of the characters "inf" or "infinity",
-      // case insensitive.
-      if (strings_internal::memcasecmp(begin + 1, "nf", 2) != 0) {
-        return false;
-      }
-      out->type = strings_internal::FloatType::kInfinity;
-      if (end - begin >= 8 &&
-          strings_internal::memcasecmp(begin + 3, "inity", 5) == 0) {
-        out->end = begin + 8;
-      } else {
-        out->end = begin + 3;
-      }
-      return true;
-    }
-    case 'n':
-    case 'N': {
-      // A NaN consists of the characters "nan", case insensitive, optionally
-      // followed by a parenthesized sequence of zero or more alphanumeric
-      // characters and/or underscores.
-      if (strings_internal::memcasecmp(begin + 1, "an", 2) != 0) {
-        return false;
-      }
-      out->type = strings_internal::FloatType::kNan;
-      out->end = begin + 3;
-      // NaN is allowed to be followed by a parenthesized string, consisting of
-      // only the characters [a-zA-Z0-9_].  Match that if it's present.
-      begin += 3;
-      if (begin < end && *begin == '(') {
-        const char* nan_begin = begin + 1;
-        while (nan_begin < end && IsNanChar(*nan_begin)) {
-          ++nan_begin;
-        }
-        if (nan_begin < end && *nan_begin == ')') {
-          // We found an extra NaN specifier range
-          out->subrange_begin = begin + 1;
-          out->subrange_end = nan_begin;
-          out->end = nan_begin + 1;
-        }
-      }
-      return true;
-    }
-    default:
-      return false;
-  }
-}
-}  // namespace
-
-namespace strings_internal {
-
-template <int base>
-strings_internal::ParsedFloat ParseFloat(const char* begin, const char* end,
-                                         chars_format format_flags) {
-  strings_internal::ParsedFloat result;
-
-  // Exit early if we're given an empty range.
-  if (begin == end) return result;
-
-  // Handle the infinity and NaN cases.
-  if (ParseInfinityOrNan(begin, end, &result)) {
-    return result;
-  }
-
-  const char* const mantissa_begin = begin;
-  while (begin < end && *begin == '0') {
-    ++begin;  // skip leading zeros
-  }
-  uint64_t mantissa = 0;
-
-  int exponent_adjustment = 0;
-  bool mantissa_is_inexact = false;
-  int pre_decimal_digits = ConsumeDigits<base>(
-      begin, end, MantissaDigitsMax<base>(), &mantissa, &mantissa_is_inexact);
-  begin += pre_decimal_digits;
-  int digits_left;
-  if (pre_decimal_digits >= DigitLimit<base>()) {
-    // refuse to parse pathological inputs
-    return result;
-  } else if (pre_decimal_digits > MantissaDigitsMax<base>()) {
-    // We dropped some non-fraction digits on the floor.  Adjust our exponent
-    // to compensate.
-    exponent_adjustment =
-        static_cast<int>(pre_decimal_digits - MantissaDigitsMax<base>());
-    digits_left = 0;
-  } else {
-    digits_left =
-        static_cast<int>(MantissaDigitsMax<base>() - pre_decimal_digits);
-  }
-  if (begin < end && *begin == '.') {
-    ++begin;
-    if (mantissa == 0) {
-      // If we haven't seen any nonzero digits yet, keep skipping zeros.  We
-      // have to adjust the exponent to reflect the changed place value.
-      const char* begin_zeros = begin;
-      while (begin < end && *begin == '0') {
-        ++begin;
-      }
-      int zeros_skipped = static_cast<int>(begin - begin_zeros);
-      if (zeros_skipped >= DigitLimit<base>()) {
-        // refuse to parse pathological inputs
-        return result;
-      }
-      exponent_adjustment -= static_cast<int>(zeros_skipped);
-    }
-    int post_decimal_digits = ConsumeDigits<base>(
-        begin, end, digits_left, &mantissa, &mantissa_is_inexact);
-    begin += post_decimal_digits;
-
-    // Since `mantissa` is an integer, each significant digit we read after
-    // the decimal point requires an adjustment to the exponent. "1.23e0" will
-    // be stored as `mantissa` == 123 and `exponent` == -2 (that is,
-    // "123e-2").
-    if (post_decimal_digits >= DigitLimit<base>()) {
-      // refuse to parse pathological inputs
-      return result;
-    } else if (post_decimal_digits > digits_left) {
-      exponent_adjustment -= digits_left;
-    } else {
-      exponent_adjustment -= post_decimal_digits;
-    }
-  }
-  // If we've found no mantissa whatsoever, this isn't a number.
-  if (mantissa_begin == begin) {
-    return result;
-  }
-  // A bare "." doesn't count as a mantissa either.
-  if (begin - mantissa_begin == 1 && *mantissa_begin == '.') {
-    return result;
-  }
-
-  if (mantissa_is_inexact) {
-    // We dropped significant digits on the floor.  Handle this appropriately.
-    if (base == 10) {
-      // If we truncated significant decimal digits, store the full range of the
-      // mantissa for future big integer math for exact rounding.
-      result.subrange_begin = mantissa_begin;
-      result.subrange_end = begin;
-    } else if (base == 16) {
-      // If we truncated hex digits, reflect this fact by setting the low
-      // ("sticky") bit.  This allows for correct rounding in all cases.
-      mantissa |= 1;
-    }
-  }
-  result.mantissa = mantissa;
-
-  const char* const exponent_begin = begin;
-  result.literal_exponent = 0;
-  bool found_exponent = false;
-  if (AllowExponent(format_flags) && begin < end &&
-      IsExponentCharacter<base>(*begin)) {
-    bool negative_exponent = false;
-    ++begin;
-    if (begin < end && *begin == '-') {
-      negative_exponent = true;
-      ++begin;
-    } else if (begin < end && *begin == '+') {
-      ++begin;
-    }
-    const char* const exponent_digits_begin = begin;
-    // Exponent is always expressed in decimal, even for hexadecimal floats.
-    begin += ConsumeDigits<10>(begin, end, kDecimalExponentDigitsMax,
-                               &result.literal_exponent, nullptr);
-    if (begin == exponent_digits_begin) {
-      // there were no digits where we expected an exponent.  We failed to read
-      // an exponent and should not consume the 'e' after all.  Rewind 'begin'.
-      found_exponent = false;
-      begin = exponent_begin;
-    } else {
-      found_exponent = true;
-      if (negative_exponent) {
-        result.literal_exponent = -result.literal_exponent;
-      }
-    }
-  }
-
-  if (!found_exponent && RequireExponent(format_flags)) {
-    // Provided flags required an exponent, but none was found.  This results
-    // in a failure to scan.
-    return result;
-  }
-
-  // Success!
-  result.type = strings_internal::FloatType::kNumber;
-  if (result.mantissa > 0) {
-    result.exponent = result.literal_exponent +
-                      (DigitMagnitude<base>() * exponent_adjustment);
-  } else {
-    result.exponent = 0;
-  }
-  result.end = begin;
-  return result;
-}
-
-template ParsedFloat ParseFloat<10>(const char* begin, const char* end,
-                                    chars_format format_flags);
-template ParsedFloat ParseFloat<16>(const char* begin, const char* end,
-                                    chars_format format_flags);
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/charconv_parse.h b/third_party/abseil/absl/strings/internal/charconv_parse.h
deleted file mode 100644
index 505998b..0000000
--- a/third_party/abseil/absl/strings/internal/charconv_parse.h
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_CHARCONV_PARSE_H_
-#define ABSL_STRINGS_INTERNAL_CHARCONV_PARSE_H_
-
-#include <cstdint>
-
-#include "absl/base/config.h"
-#include "absl/strings/charconv.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// Enum indicating whether a parsed float is a number or special value.
-enum class FloatType { kNumber, kInfinity, kNan };
-
-// The decomposed parts of a parsed `float` or `double`.
-struct ParsedFloat {
-  // Representation of the parsed mantissa, with the decimal point adjusted to
-  // make it an integer.
-  //
-  // During decimal scanning, this contains 19 significant digits worth of
-  // mantissa value.  If digits beyond this point are found, they
-  // are truncated, and if any of these dropped digits are nonzero, then
-  // `mantissa` is inexact, and the full mantissa is stored in [subrange_begin,
-  // subrange_end).
-  //
-  // During hexadecimal scanning, this contains 15 significant hex digits worth
-  // of mantissa value.  Digits beyond this point are sticky -- they are
-  // truncated, but if any dropped digits are nonzero, the low bit of mantissa
-  // will be set.  (This allows for precise rounding, and avoids the need
-  // to store the full mantissa in [subrange_begin, subrange_end).)
-  uint64_t mantissa = 0;
-
-  // Floating point expontent.  This reflects any decimal point adjustments and
-  // any truncated digits from the mantissa.  The absolute value of the parsed
-  // number is represented by mantissa * (base ** exponent), where base==10 for
-  // decimal floats, and base==2 for hexadecimal floats.
-  int exponent = 0;
-
-  // The literal exponent value scanned from the input, or 0 if none was
-  // present.  This does not reflect any adjustments applied to mantissa.
-  int literal_exponent = 0;
-
-  // The type of number scanned.
-  FloatType type = FloatType::kNumber;
-
-  // When non-null, [subrange_begin, subrange_end) marks a range of characters
-  // that require further processing.  The meaning is dependent on float type.
-  // If type == kNumber and this is set, this is a "wide input": the input
-  // mantissa contained more than 19 digits.  The range contains the full
-  // mantissa.  It plus `literal_exponent` need to be examined to find the best
-  // floating point match.
-  // If type == kNan and this is set, the range marks the contents of a
-  // matched parenthesized character region after the NaN.
-  const char* subrange_begin = nullptr;
-  const char* subrange_end = nullptr;
-
-  // One-past-the-end of the successfully parsed region, or nullptr if no
-  // matching pattern was found.
-  const char* end = nullptr;
-};
-
-// Read the floating point number in the provided range, and populate
-// ParsedFloat accordingly.
-//
-// format_flags is a bitmask value specifying what patterns this API will match.
-// `scientific` and `fixed`  are honored per std::from_chars rules
-// ([utility.from.chars], C++17): if exactly one of these bits is set, then an
-// exponent is required, or dislallowed, respectively.
-//
-// Template parameter `base` must be either 10 or 16.  For base 16, a "0x" is
-// *not* consumed.  The `hex` bit from format_flags is ignored by ParseFloat.
-template <int base>
-ParsedFloat ParseFloat(const char* begin, const char* end,
-                       absl::chars_format format_flags);
-
-extern template ParsedFloat ParseFloat<10>(const char* begin, const char* end,
-                                           absl::chars_format format_flags);
-extern template ParsedFloat ParseFloat<16>(const char* begin, const char* end,
-                                           absl::chars_format format_flags);
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_STRINGS_INTERNAL_CHARCONV_PARSE_H_
diff --git a/third_party/abseil/absl/strings/internal/charconv_parse_test.cc b/third_party/abseil/absl/strings/internal/charconv_parse_test.cc
deleted file mode 100644
index bc2d111..0000000
--- a/third_party/abseil/absl/strings/internal/charconv_parse_test.cc
+++ /dev/null
@@ -1,357 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/charconv_parse.h"
-
-#include <string>
-#include <utility>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/str_cat.h"
-
-using absl::chars_format;
-using absl::strings_internal::FloatType;
-using absl::strings_internal::ParsedFloat;
-using absl::strings_internal::ParseFloat;
-
-namespace {
-
-// Check that a given string input is parsed to the expected mantissa and
-// exponent.
-//
-// Input string `s` must contain a '$' character.  It marks the end of the
-// characters that should be consumed by the match.  It is stripped from the
-// input to ParseFloat.
-//
-// If input string `s` contains '[' and ']' characters, these mark the region
-// of characters that should be marked as the "subrange".  For NaNs, this is
-// the location of the extended NaN string.  For numbers, this is the location
-// of the full, over-large mantissa.
-template <int base>
-void ExpectParsedFloat(std::string s, absl::chars_format format_flags,
-                       FloatType expected_type, uint64_t expected_mantissa,
-                       int expected_exponent,
-                       int expected_literal_exponent = -999) {
-  SCOPED_TRACE(s);
-
-  int begin_subrange = -1;
-  int end_subrange = -1;
-  // If s contains '[' and ']', then strip these characters and set the subrange
-  // indices appropriately.
-  std::string::size_type open_bracket_pos = s.find('[');
-  if (open_bracket_pos != std::string::npos) {
-    begin_subrange = static_cast<int>(open_bracket_pos);
-    s.replace(open_bracket_pos, 1, "");
-    std::string::size_type close_bracket_pos = s.find(']');
-    ABSL_RAW_CHECK(close_bracket_pos != absl::string_view::npos,
-                   "Test input contains [ without matching ]");
-    end_subrange = static_cast<int>(close_bracket_pos);
-    s.replace(close_bracket_pos, 1, "");
-  }
-  const std::string::size_type expected_characters_matched = s.find('$');
-  ABSL_RAW_CHECK(expected_characters_matched != std::string::npos,
-                 "Input string must contain $");
-  s.replace(expected_characters_matched, 1, "");
-
-  ParsedFloat parsed =
-      ParseFloat<base>(s.data(), s.data() + s.size(), format_flags);
-
-  EXPECT_NE(parsed.end, nullptr);
-  if (parsed.end == nullptr) {
-    return;  // The following tests are not useful if we fully failed to parse
-  }
-  EXPECT_EQ(parsed.type, expected_type);
-  if (begin_subrange == -1) {
-    EXPECT_EQ(parsed.subrange_begin, nullptr);
-    EXPECT_EQ(parsed.subrange_end, nullptr);
-  } else {
-    EXPECT_EQ(parsed.subrange_begin, s.data() + begin_subrange);
-    EXPECT_EQ(parsed.subrange_end, s.data() + end_subrange);
-  }
-  if (parsed.type == FloatType::kNumber) {
-    EXPECT_EQ(parsed.mantissa, expected_mantissa);
-    EXPECT_EQ(parsed.exponent, expected_exponent);
-    if (expected_literal_exponent != -999) {
-      EXPECT_EQ(parsed.literal_exponent, expected_literal_exponent);
-    }
-  }
-  auto characters_matched = static_cast<int>(parsed.end - s.data());
-  EXPECT_EQ(characters_matched, expected_characters_matched);
-}
-
-// Check that a given string input is parsed to the expected mantissa and
-// exponent.
-//
-// Input string `s` must contain a '$' character.  It marks the end of the
-// characters that were consumed by the match.
-template <int base>
-void ExpectNumber(std::string s, absl::chars_format format_flags,
-                  uint64_t expected_mantissa, int expected_exponent,
-                  int expected_literal_exponent = -999) {
-  ExpectParsedFloat<base>(std::move(s), format_flags, FloatType::kNumber,
-                          expected_mantissa, expected_exponent,
-                          expected_literal_exponent);
-}
-
-// Check that a given string input is parsed to the given special value.
-//
-// This tests against both number bases, since infinities and NaNs have
-// identical representations in both modes.
-void ExpectSpecial(const std::string& s, absl::chars_format format_flags,
-                   FloatType type) {
-  ExpectParsedFloat<10>(s, format_flags, type, 0, 0);
-  ExpectParsedFloat<16>(s, format_flags, type, 0, 0);
-}
-
-// Check that a given input string is not matched by Float.
-template <int base>
-void ExpectFailedParse(absl::string_view s, absl::chars_format format_flags) {
-  ParsedFloat parsed =
-      ParseFloat<base>(s.data(), s.data() + s.size(), format_flags);
-  EXPECT_EQ(parsed.end, nullptr);
-}
-
-TEST(ParseFloat, SimpleValue) {
-  // Test that various forms of floating point numbers all parse correctly.
-  ExpectNumber<10>("1.23456789e5$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789e+5$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789E5$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789e05$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("123.456789e3$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("0.000123456789e9$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("123456.789$", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("123456789e-3$", chars_format::general, 123456789, -3);
-
-  ExpectNumber<16>("1.234abcdefp28$", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("1.234abcdefp+28$", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("1.234ABCDEFp28$", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("1.234AbCdEfP0028$", chars_format::general, 0x1234abcdef,
-                   -8);
-  ExpectNumber<16>("123.4abcdefp20$", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("0.0001234abcdefp44$", chars_format::general, 0x1234abcdef,
-                   -8);
-  ExpectNumber<16>("1234abcd.ef$", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("1234abcdefp-8$", chars_format::general, 0x1234abcdef, -8);
-
-  // ExpectNumber does not attempt to drop trailing zeroes.
-  ExpectNumber<10>("0001.2345678900e005$", chars_format::general, 12345678900,
-                   -5);
-  ExpectNumber<16>("0001.234abcdef000p28$", chars_format::general,
-                   0x1234abcdef000, -20);
-
-  // Ensure non-matching characters after a number are ignored, even when they
-  // look like potentially matching characters.
-  ExpectNumber<10>("1.23456789e5$   ", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789e5$e5e5", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789e5$.25", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789e5$-", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("1.23456789e5$PUPPERS!!!", chars_format::general, 123456789,
-                   -3);
-  ExpectNumber<10>("123456.789$efghij", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("123456.789$e", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("123456.789$p5", chars_format::general, 123456789, -3);
-  ExpectNumber<10>("123456.789$.10", chars_format::general, 123456789, -3);
-
-  ExpectNumber<16>("1.234abcdefp28$   ", chars_format::general, 0x1234abcdef,
-                   -8);
-  ExpectNumber<16>("1.234abcdefp28$p28", chars_format::general, 0x1234abcdef,
-                   -8);
-  ExpectNumber<16>("1.234abcdefp28$.125", chars_format::general, 0x1234abcdef,
-                   -8);
-  ExpectNumber<16>("1.234abcdefp28$-", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("1.234abcdefp28$KITTEHS!!!", chars_format::general,
-                   0x1234abcdef, -8);
-  ExpectNumber<16>("1234abcd.ef$ghijk", chars_format::general, 0x1234abcdef,
-                   -8);
-  ExpectNumber<16>("1234abcd.ef$p", chars_format::general, 0x1234abcdef, -8);
-  ExpectNumber<16>("1234abcd.ef$.10", chars_format::general, 0x1234abcdef, -8);
-
-  // Ensure we can read a full resolution mantissa without overflow.
-  ExpectNumber<10>("9999999999999999999$", chars_format::general,
-                   9999999999999999999u, 0);
-  ExpectNumber<16>("fffffffffffffff$", chars_format::general,
-                   0xfffffffffffffffu, 0);
-
-  // Check that zero is consistently read.
-  ExpectNumber<10>("0$", chars_format::general, 0, 0);
-  ExpectNumber<16>("0$", chars_format::general, 0, 0);
-  ExpectNumber<10>("000000000000000000000000000000000000000$",
-                   chars_format::general, 0, 0);
-  ExpectNumber<16>("000000000000000000000000000000000000000$",
-                   chars_format::general, 0, 0);
-  ExpectNumber<10>("0000000000000000000000.000000000000000000$",
-                   chars_format::general, 0, 0);
-  ExpectNumber<16>("0000000000000000000000.000000000000000000$",
-                   chars_format::general, 0, 0);
-  ExpectNumber<10>("0.00000000000000000000000000000000e123456$",
-                   chars_format::general, 0, 0);
-  ExpectNumber<16>("0.00000000000000000000000000000000p123456$",
-                   chars_format::general, 0, 0);
-}
-
-TEST(ParseFloat, LargeDecimalMantissa) {
-  // After 19 significant decimal digits in the mantissa, ParsedFloat will
-  // truncate additional digits.  We need to test that:
-  //   1) the truncation to 19 digits happens
-  //   2) the returned exponent reflects the dropped significant digits
-  //   3) a correct literal_exponent is set
-  //
-  // If and only if a significant digit is found after 19 digits, then the
-  // entirety of the mantissa in case the exact value is needed to make a
-  // rounding decision.  The [ and ] characters below denote where such a
-  // subregion was marked by by ParseFloat.  They are not part of the input.
-
-  // Mark a capture group only if a dropped digit is significant (nonzero).
-  ExpectNumber<10>("100000000000000000000000000$", chars_format::general,
-                   1000000000000000000,
-                   /* adjusted exponent */ 8);
-
-  ExpectNumber<10>("123456789123456789100000000$", chars_format::general,
-                   1234567891234567891,
-                   /* adjusted exponent */ 8);
-
-  ExpectNumber<10>("[123456789123456789123456789]$", chars_format::general,
-                   1234567891234567891,
-                   /* adjusted exponent */ 8,
-                   /* literal exponent */ 0);
-
-  ExpectNumber<10>("[123456789123456789100000009]$", chars_format::general,
-                   1234567891234567891,
-                   /* adjusted exponent */ 8,
-                   /* literal exponent */ 0);
-
-  ExpectNumber<10>("[123456789123456789120000000]$", chars_format::general,
-                   1234567891234567891,
-                   /* adjusted exponent */ 8,
-                   /* literal exponent */ 0);
-
-  // Leading zeroes should not count towards the 19 significant digit limit
-  ExpectNumber<10>("[00000000123456789123456789123456789]$",
-                   chars_format::general, 1234567891234567891,
-                   /* adjusted exponent */ 8,
-                   /* literal exponent */ 0);
-
-  ExpectNumber<10>("00000000123456789123456789100000000$",
-                   chars_format::general, 1234567891234567891,
-                   /* adjusted exponent */ 8);
-
-  // Truncated digits after the decimal point should not cause a further
-  // exponent adjustment.
-  ExpectNumber<10>("1.234567891234567891e123$", chars_format::general,
-                   1234567891234567891, 105);
-  ExpectNumber<10>("[1.23456789123456789123456789]e123$", chars_format::general,
-                   1234567891234567891,
-                   /* adjusted exponent */ 105,
-                   /* literal exponent */ 123);
-
-  // Ensure we truncate, and not round.  (The from_chars algorithm we use
-  // depends on our guess missing low, if it misses, so we need the rounding
-  // error to be downward.)
-  ExpectNumber<10>("[1999999999999999999999]$", chars_format::general,
-                   1999999999999999999,
-                   /* adjusted exponent */ 3,
-                   /* literal exponent */ 0);
-}
-
-TEST(ParseFloat, LargeHexadecimalMantissa) {
-  // After 15 significant hex digits in the mantissa, ParsedFloat will treat
-  // additional digits as sticky,  We need to test that:
-  //   1) The truncation to 15 digits happens
-  //   2) The returned exponent reflects the dropped significant digits
-  //   3) If a nonzero digit is dropped, the low bit of mantissa is set.
-
-  ExpectNumber<16>("123456789abcdef123456789abcdef$", chars_format::general,
-                   0x123456789abcdef, 60);
-
-  // Leading zeroes should not count towards the 15 significant digit limit
-  ExpectNumber<16>("000000123456789abcdef123456789abcdef$",
-                   chars_format::general, 0x123456789abcdef, 60);
-
-  // Truncated digits after the radix point should not cause a further
-  // exponent adjustment.
-  ExpectNumber<16>("1.23456789abcdefp100$", chars_format::general,
-                   0x123456789abcdef, 44);
-  ExpectNumber<16>("1.23456789abcdef123456789abcdefp100$",
-                   chars_format::general, 0x123456789abcdef, 44);
-
-  // test sticky digit behavior.  The low bit should be set iff any dropped
-  // digit is nonzero.
-  ExpectNumber<16>("123456789abcdee123456789abcdee$", chars_format::general,
-                   0x123456789abcdef, 60);
-  ExpectNumber<16>("123456789abcdee000000000000001$", chars_format::general,
-                   0x123456789abcdef, 60);
-  ExpectNumber<16>("123456789abcdee000000000000000$", chars_format::general,
-                   0x123456789abcdee, 60);
-}
-
-TEST(ParseFloat, ScientificVsFixed) {
-  // In fixed mode, an exponent is never matched (but the remainder of the
-  // number will be matched.)
-  ExpectNumber<10>("1.23456789$e5", chars_format::fixed, 123456789, -8);
-  ExpectNumber<10>("123456.789$", chars_format::fixed, 123456789, -3);
-  ExpectNumber<16>("1.234abcdef$p28", chars_format::fixed, 0x1234abcdef, -36);
-  ExpectNumber<16>("1234abcd.ef$", chars_format::fixed, 0x1234abcdef, -8);
-
-  // In scientific mode, numbers don't match *unless* they have an exponent.
-  ExpectNumber<10>("1.23456789e5$", chars_format::scientific, 123456789, -3);
-  ExpectFailedParse<10>("-123456.789$", chars_format::scientific);
-  ExpectNumber<16>("1.234abcdefp28$", chars_format::scientific, 0x1234abcdef,
-                   -8);
-  ExpectFailedParse<16>("1234abcd.ef$", chars_format::scientific);
-}
-
-TEST(ParseFloat, Infinity) {
-  ExpectFailedParse<10>("in", chars_format::general);
-  ExpectFailedParse<16>("in", chars_format::general);
-  ExpectFailedParse<10>("inx", chars_format::general);
-  ExpectFailedParse<16>("inx", chars_format::general);
-  ExpectSpecial("inf$", chars_format::general, FloatType::kInfinity);
-  ExpectSpecial("Inf$", chars_format::general, FloatType::kInfinity);
-  ExpectSpecial("INF$", chars_format::general, FloatType::kInfinity);
-  ExpectSpecial("inf$inite", chars_format::general, FloatType::kInfinity);
-  ExpectSpecial("iNfInItY$", chars_format::general, FloatType::kInfinity);
-  ExpectSpecial("infinity$!!!", chars_format::general, FloatType::kInfinity);
-}
-
-TEST(ParseFloat, NaN) {
-  ExpectFailedParse<10>("na", chars_format::general);
-  ExpectFailedParse<16>("na", chars_format::general);
-  ExpectFailedParse<10>("nah", chars_format::general);
-  ExpectFailedParse<16>("nah", chars_format::general);
-  ExpectSpecial("nan$", chars_format::general, FloatType::kNan);
-  ExpectSpecial("NaN$", chars_format::general, FloatType::kNan);
-  ExpectSpecial("nAn$", chars_format::general, FloatType::kNan);
-  ExpectSpecial("NAN$", chars_format::general, FloatType::kNan);
-  ExpectSpecial("NaN$aNaNaNaNaBatman!", chars_format::general, FloatType::kNan);
-
-  // A parenthesized sequence of the characters [a-zA-Z0-9_] is allowed to
-  // appear after an NaN.  Check that this is allowed, and that the correct
-  // characters are grouped.
-  //
-  // (The characters [ and ] in the pattern below delimit the expected matched
-  // subgroup; they are not part of the input passed to ParseFloat.)
-  ExpectSpecial("nan([0xabcdef])$", chars_format::general, FloatType::kNan);
-  ExpectSpecial("nan([0xabcdef])$...", chars_format::general, FloatType::kNan);
-  ExpectSpecial("nan([0xabcdef])$)...", chars_format::general, FloatType::kNan);
-  ExpectSpecial("nan([])$", chars_format::general, FloatType::kNan);
-  ExpectSpecial("nan([aAzZ09_])$", chars_format::general, FloatType::kNan);
-  // If the subgroup contains illegal characters, don't match it at all.
-  ExpectSpecial("nan$(bad-char)", chars_format::general, FloatType::kNan);
-  // Also cope with a missing close paren.
-  ExpectSpecial("nan$(0xabcdef", chars_format::general, FloatType::kNan);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/cord_internal.cc b/third_party/abseil/absl/strings/internal/cord_internal.cc
deleted file mode 100644
index 59f2e4d..0000000
--- a/third_party/abseil/absl/strings/internal/cord_internal.cc
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include "absl/strings/internal/cord_internal.h"
-
-#include <atomic>
-#include <cassert>
-#include <memory>
-
-#include "absl/container/inlined_vector.h"
-#include "absl/strings/internal/cord_rep_flat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace cord_internal {
-
-ABSL_CONST_INIT std::atomic<bool> cord_ring_buffer_enabled(
-    kCordEnableRingBufferDefault);
-ABSL_CONST_INIT std::atomic<bool> shallow_subcords_enabled(
-    kCordShallowSubcordsDefault);
-
-void CordRep::Destroy(CordRep* rep) {
-  assert(rep != nullptr);
-
-  absl::InlinedVector<CordRep*, Constants::kInlinedVectorSize> pending;
-  while (true) {
-    assert(!rep->refcount.IsImmortal());
-    if (rep->tag == CONCAT) {
-      CordRepConcat* rep_concat = rep->concat();
-      CordRep* right = rep_concat->right;
-      if (!right->refcount.Decrement()) {
-        pending.push_back(right);
-      }
-      CordRep* left = rep_concat->left;
-      delete rep_concat;
-      rep = nullptr;
-      if (!left->refcount.Decrement()) {
-        rep = left;
-        continue;
-      }
-    } else if (rep->tag == EXTERNAL) {
-      CordRepExternal::Delete(rep);
-      rep = nullptr;
-    } else if (rep->tag == SUBSTRING) {
-      CordRepSubstring* rep_substring = rep->substring();
-      CordRep* child = rep_substring->child;
-      delete rep_substring;
-      rep = nullptr;
-      if (!child->refcount.Decrement()) {
-        rep = child;
-        continue;
-      }
-    } else {
-      CordRepFlat::Delete(rep);
-      rep = nullptr;
-    }
-
-    if (!pending.empty()) {
-      rep = pending.back();
-      pending.pop_back();
-    } else {
-      break;
-    }
-  }
-}
-
-}  // namespace cord_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/cord_internal.h b/third_party/abseil/absl/strings/internal/cord_internal.h
deleted file mode 100644
index 57e7046..0000000
--- a/third_party/abseil/absl/strings/internal/cord_internal.h
+++ /dev/null
@@ -1,408 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_CORD_INTERNAL_H_
-#define ABSL_STRINGS_INTERNAL_CORD_INTERNAL_H_
-
-#include <atomic>
-#include <cassert>
-#include <cstddef>
-#include <cstdint>
-#include <type_traits>
-
-#include "absl/base/internal/invoke.h"
-#include "absl/base/optimization.h"
-#include "absl/container/internal/compressed_tuple.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace cord_internal {
-
-// Default feature enable states for cord ring buffers
-enum CordFeatureDefaults {
-  kCordEnableRingBufferDefault = false,
-  kCordShallowSubcordsDefault = false
-};
-
-extern std::atomic<bool> cord_ring_buffer_enabled;
-extern std::atomic<bool> shallow_subcords_enabled;
-
-inline void enable_cord_ring_buffer(bool enable) {
-  cord_ring_buffer_enabled.store(enable, std::memory_order_relaxed);
-}
-
-inline void enable_shallow_subcords(bool enable) {
-  shallow_subcords_enabled.store(enable, std::memory_order_relaxed);
-}
-
-enum Constants {
-  // The inlined size to use with absl::InlinedVector.
-  //
-  // Note: The InlinedVectors in this file (and in cord.h) do not need to use
-  // the same value for their inlined size. The fact that they do is historical.
-  // It may be desirable for each to use a different inlined size optimized for
-  // that InlinedVector's usage.
-  //
-  // TODO(jgm): Benchmark to see if there's a more optimal value than 47 for
-  // the inlined vector size (47 exists for backward compatibility).
-  kInlinedVectorSize = 47,
-
-  // Prefer copying blocks of at most this size, otherwise reference count.
-  kMaxBytesToCopy = 511
-};
-
-// Wraps std::atomic for reference counting.
-class Refcount {
- public:
-  constexpr Refcount() : count_{kRefIncrement} {}
-  struct Immortal {};
-  explicit constexpr Refcount(Immortal) : count_(kImmortalTag) {}
-
-  // Increments the reference count. Imposes no memory ordering.
-  inline void Increment() {
-    count_.fetch_add(kRefIncrement, std::memory_order_relaxed);
-  }
-
-  // Asserts that the current refcount is greater than 0. If the refcount is
-  // greater than 1, decrements the reference count.
-  //
-  // Returns false if there are no references outstanding; true otherwise.
-  // Inserts barriers to ensure that state written before this method returns
-  // false will be visible to a thread that just observed this method returning
-  // false.
-  inline bool Decrement() {
-    int32_t refcount = count_.load(std::memory_order_acquire);
-    assert(refcount > 0 || refcount & kImmortalTag);
-    return refcount != kRefIncrement &&
-           count_.fetch_sub(kRefIncrement, std::memory_order_acq_rel) !=
-               kRefIncrement;
-  }
-
-  // Same as Decrement but expect that refcount is greater than 1.
-  inline bool DecrementExpectHighRefcount() {
-    int32_t refcount =
-        count_.fetch_sub(kRefIncrement, std::memory_order_acq_rel);
-    assert(refcount > 0 || refcount & kImmortalTag);
-    return refcount != kRefIncrement;
-  }
-
-  // Returns the current reference count using acquire semantics.
-  inline int32_t Get() const {
-    return count_.load(std::memory_order_acquire) >> kImmortalShift;
-  }
-
-  // Returns whether the atomic integer is 1.
-  // If the reference count is used in the conventional way, a
-  // reference count of 1 implies that the current thread owns the
-  // reference and no other thread shares it.
-  // This call performs the test for a reference count of one, and
-  // performs the memory barrier needed for the owning thread
-  // to act on the object, knowing that it has exclusive access to the
-  // object.
-  inline bool IsOne() {
-    return count_.load(std::memory_order_acquire) == kRefIncrement;
-  }
-
-  bool IsImmortal() const {
-    return (count_.load(std::memory_order_relaxed) & kImmortalTag) != 0;
-  }
-
- private:
-  // We reserve the bottom bit to tag a reference count as immortal.
-  // By making it `1` we ensure that we never reach `0` when adding/subtracting
-  // `2`, thus it never looks as if it should be destroyed.
-  // These are used for the StringConstant constructor where we do not increase
-  // the refcount at construction time (due to constinit requirements) but we
-  // will still decrease it at destruction time to avoid branching on Unref.
-  enum {
-    kImmortalShift = 1,
-    kRefIncrement = 1 << kImmortalShift,
-    kImmortalTag = kRefIncrement - 1
-  };
-
-  std::atomic<int32_t> count_;
-};
-
-// The overhead of a vtable is too much for Cord, so we roll our own subclasses
-// using only a single byte to differentiate classes from each other - the "tag"
-// byte.  Define the subclasses first so we can provide downcasting helper
-// functions in the base class.
-
-struct CordRepConcat;
-struct CordRepExternal;
-struct CordRepFlat;
-struct CordRepSubstring;
-
-// Various representations that we allow
-enum CordRepKind {
-  CONCAT        = 0,
-  EXTERNAL      = 1,
-  SUBSTRING     = 2,
-  RING          = 3,
-
-  // We have different tags for different sized flat arrays,
-  // starting with FLAT, and limited to MAX_FLAT_TAG. The 224 value is based on
-  // the current 'size to tag' encoding of 8 / 32 bytes. If a new tag is needed
-  // in the future, then 'FLAT' and 'MAX_FLAT_TAG' should be adjusted as well
-  // as the Tag <---> Size logic so that FLAT stil represents the minimum flat
-  // allocation size. (32 bytes as of now).
-  FLAT = 4,
-  MAX_FLAT_TAG = 224,
-};
-
-struct CordRep {
-  CordRep() = default;
-  constexpr CordRep(Refcount::Immortal immortal, size_t l)
-      : length(l), refcount(immortal), tag(EXTERNAL), data{} {}
-
-  // The following three fields have to be less than 32 bytes since
-  // that is the smallest supported flat node size.
-  size_t length;
-  Refcount refcount;
-  // If tag < FLAT, it represents CordRepKind and indicates the type of node.
-  // Otherwise, the node type is CordRepFlat and the tag is the encoded size.
-  uint8_t tag;
-  char data[1];  // Starting point for flat array: MUST BE LAST FIELD of CordRep
-
-  inline CordRepConcat* concat();
-  inline const CordRepConcat* concat() const;
-  inline CordRepSubstring* substring();
-  inline const CordRepSubstring* substring() const;
-  inline CordRepExternal* external();
-  inline const CordRepExternal* external() const;
-  inline CordRepFlat* flat();
-  inline const CordRepFlat* flat() const;
-
-  // --------------------------------------------------------------------
-  // Memory management
-
-  // This internal routine is called from the cold path of Unref below. Keeping
-  // it in a separate routine allows good inlining of Unref into many profitable
-  // call sites. However, the call to this function can be highly disruptive to
-  // the register pressure in those callers. To minimize the cost to callers, we
-  // use a special LLVM calling convention that preserves most registers. This
-  // allows the call to this routine in cold paths to not disrupt the caller's
-  // register pressure. This calling convention is not available on all
-  // platforms; we intentionally allow LLVM to ignore the attribute rather than
-  // attempting to hardcode the list of supported platforms.
-#if defined(__clang__) && !defined(__i386__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wattributes"
-  __attribute__((preserve_most))
-#pragma clang diagnostic pop
-#endif
-  static void Destroy(CordRep* rep);
-
-  // Increments the reference count of `rep`.
-  // Requires `rep` to be a non-null pointer value.
-  static inline CordRep* Ref(CordRep* rep);
-
-  // Decrements the reference count of `rep`. Destroys rep if count reaches
-  // zero. Requires `rep` to be a non-null pointer value.
-  static inline void Unref(CordRep* rep);
-};
-
-struct CordRepConcat : public CordRep {
-  CordRep* left;
-  CordRep* right;
-
-  uint8_t depth() const { return static_cast<uint8_t>(data[0]); }
-  void set_depth(uint8_t depth) { data[0] = static_cast<char>(depth); }
-};
-
-struct CordRepSubstring : public CordRep {
-  size_t start;  // Starting offset of substring in child
-  CordRep* child;
-};
-
-// Type for function pointer that will invoke the releaser function and also
-// delete the `CordRepExternalImpl` corresponding to the passed in
-// `CordRepExternal`.
-using ExternalReleaserInvoker = void (*)(CordRepExternal*);
-
-// External CordReps are allocated together with a type erased releaser. The
-// releaser is stored in the memory directly following the CordRepExternal.
-struct CordRepExternal : public CordRep {
-  CordRepExternal() = default;
-  explicit constexpr CordRepExternal(absl::string_view str)
-      : CordRep(Refcount::Immortal{}, str.size()),
-        base(str.data()),
-        releaser_invoker(nullptr) {}
-
-  const char* base;
-  // Pointer to function that knows how to call and destroy the releaser.
-  ExternalReleaserInvoker releaser_invoker;
-
-  // Deletes (releases) the external rep.
-  // Requires rep != nullptr and rep->tag == EXTERNAL
-  static void Delete(CordRep* rep);
-};
-
-struct Rank1 {};
-struct Rank0 : Rank1 {};
-
-template <typename Releaser, typename = ::absl::base_internal::invoke_result_t<
-                                 Releaser, absl::string_view>>
-void InvokeReleaser(Rank0, Releaser&& releaser, absl::string_view data) {
-  ::absl::base_internal::invoke(std::forward<Releaser>(releaser), data);
-}
-
-template <typename Releaser,
-          typename = ::absl::base_internal::invoke_result_t<Releaser>>
-void InvokeReleaser(Rank1, Releaser&& releaser, absl::string_view) {
-  ::absl::base_internal::invoke(std::forward<Releaser>(releaser));
-}
-
-// We use CompressedTuple so that we can benefit from EBCO.
-template <typename Releaser>
-struct CordRepExternalImpl
-    : public CordRepExternal,
-      public ::absl::container_internal::CompressedTuple<Releaser> {
-  // The extra int arg is so that we can avoid interfering with copy/move
-  // constructors while still benefitting from perfect forwarding.
-  template <typename T>
-  CordRepExternalImpl(T&& releaser, int)
-      : CordRepExternalImpl::CompressedTuple(std::forward<T>(releaser)) {
-    this->releaser_invoker = &Release;
-  }
-
-  ~CordRepExternalImpl() {
-    InvokeReleaser(Rank0{}, std::move(this->template get<0>()),
-                   absl::string_view(base, length));
-  }
-
-  static void Release(CordRepExternal* rep) {
-    delete static_cast<CordRepExternalImpl*>(rep);
-  }
-};
-
-inline void CordRepExternal::Delete(CordRep* rep) {
-  assert(rep != nullptr && rep->tag == EXTERNAL);
-  auto* rep_external = static_cast<CordRepExternal*>(rep);
-  assert(rep_external->releaser_invoker != nullptr);
-  rep_external->releaser_invoker(rep_external);
-}
-
-template <typename Str>
-struct ConstInitExternalStorage {
-  ABSL_CONST_INIT static CordRepExternal value;
-};
-
-template <typename Str>
-CordRepExternal ConstInitExternalStorage<Str>::value(Str::value);
-
-enum {
-  kMaxInline = 15,
-  // Tag byte & kMaxInline means we are storing a pointer.
-  kTreeFlag = 1 << 4,
-  // Tag byte & kProfiledFlag means we are profiling the Cord.
-  kProfiledFlag = 1 << 5
-};
-
-// If the data has length <= kMaxInline, we store it in `as_chars`, and
-// store the size in `tagged_size`.
-// Else we store it in a tree and store a pointer to that tree in
-// `as_tree.rep` and store a tag in `tagged_size`.
-struct AsTree {
-  absl::cord_internal::CordRep* rep;
-  char padding[kMaxInline + 1 - sizeof(absl::cord_internal::CordRep*) - 1];
-  char tagged_size;
-};
-
-constexpr char GetOrNull(absl::string_view data, size_t pos) {
-  return pos < data.size() ? data[pos] : '\0';
-}
-
-union InlineData {
-  constexpr InlineData() : as_chars{} {}
-  explicit constexpr InlineData(AsTree tree) : as_tree(tree) {}
-  explicit constexpr InlineData(absl::string_view chars)
-      : as_chars{GetOrNull(chars, 0),  GetOrNull(chars, 1),
-                 GetOrNull(chars, 2),  GetOrNull(chars, 3),
-                 GetOrNull(chars, 4),  GetOrNull(chars, 5),
-                 GetOrNull(chars, 6),  GetOrNull(chars, 7),
-                 GetOrNull(chars, 8),  GetOrNull(chars, 9),
-                 GetOrNull(chars, 10), GetOrNull(chars, 11),
-                 GetOrNull(chars, 12), GetOrNull(chars, 13),
-                 GetOrNull(chars, 14), static_cast<char>(chars.size())} {}
-
-  AsTree as_tree;
-  char as_chars[kMaxInline + 1];
-};
-static_assert(sizeof(InlineData) == kMaxInline + 1, "");
-static_assert(sizeof(AsTree) == sizeof(InlineData), "");
-static_assert(offsetof(AsTree, tagged_size) == kMaxInline, "");
-
-inline CordRepConcat* CordRep::concat() {
-  assert(tag == CONCAT);
-  return static_cast<CordRepConcat*>(this);
-}
-
-inline const CordRepConcat* CordRep::concat() const {
-  assert(tag == CONCAT);
-  return static_cast<const CordRepConcat*>(this);
-}
-
-inline CordRepSubstring* CordRep::substring() {
-  assert(tag == SUBSTRING);
-  return static_cast<CordRepSubstring*>(this);
-}
-
-inline const CordRepSubstring* CordRep::substring() const {
-  assert(tag == SUBSTRING);
-  return static_cast<const CordRepSubstring*>(this);
-}
-
-inline CordRepExternal* CordRep::external() {
-  assert(tag == EXTERNAL);
-  return static_cast<CordRepExternal*>(this);
-}
-
-inline const CordRepExternal* CordRep::external() const {
-  assert(tag == EXTERNAL);
-  return static_cast<const CordRepExternal*>(this);
-}
-
-inline CordRepFlat* CordRep::flat() {
-  assert(tag >= FLAT && tag <= MAX_FLAT_TAG);
-  return reinterpret_cast<CordRepFlat*>(this);
-}
-
-inline const CordRepFlat* CordRep::flat() const {
-  assert(tag >= FLAT && tag <= MAX_FLAT_TAG);
-  return reinterpret_cast<const CordRepFlat*>(this);
-}
-
-inline CordRep* CordRep::Ref(CordRep* rep) {
-  assert(rep != nullptr);
-  rep->refcount.Increment();
-  return rep;
-}
-
-inline void CordRep::Unref(CordRep* rep) {
-  assert(rep != nullptr);
-  // Expect refcount to be 0. Avoiding the cost of an atomic decrement should
-  // typically outweigh the cost of an extra branch checking for ref == 1.
-  if (ABSL_PREDICT_FALSE(!rep->refcount.DecrementExpectHighRefcount())) {
-    Destroy(rep);
-  }
-}
-
-}  // namespace cord_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_STRINGS_INTERNAL_CORD_INTERNAL_H_
diff --git a/third_party/abseil/absl/strings/internal/cord_rep_flat.h b/third_party/abseil/absl/strings/internal/cord_rep_flat.h
deleted file mode 100644
index af3d961..0000000
--- a/third_party/abseil/absl/strings/internal/cord_rep_flat.h
+++ /dev/null
@@ -1,129 +0,0 @@
-// Copyright 2020 The Abseil Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_CORD_REP_FLAT_H_
-#define ABSL_STRINGS_INTERNAL_CORD_REP_FLAT_H_
-
-#include <cassert>
-#include <cstddef>
-#include <cstdint>
-#include <memory>
-
-#include "absl/strings/internal/cord_internal.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace cord_internal {
-
-// Note: all constants below are never ODR used and internal to cord, we define
-// these as static constexpr to avoid 'in struct' definition and usage clutter.
-
-// Largest and smallest flat node lengths we are willing to allocate
-// Flat allocation size is stored in tag, which currently can encode sizes up
-// to 4K, encoded as multiple of either 8 or 32 bytes.
-// If we allow for larger sizes, we need to change this to 8/64, 16/128, etc.
-// kMinFlatSize is bounded by tag needing to be at least FLAT * 8 bytes, and
-// ideally a 'nice' size aligning with allocation and cacheline sizes like 32.
-// kMaxFlatSize is bounded by the size resulting in a computed tag no greater
-// than MAX_FLAT_TAG. MAX_FLAT_TAG provides for additional 'high' tag values.
-static constexpr size_t kFlatOverhead = offsetof(CordRep, data);
-static constexpr size_t kMinFlatSize = 32;
-static constexpr size_t kMaxFlatSize = 4096;
-static constexpr size_t kMaxFlatLength = kMaxFlatSize - kFlatOverhead;
-static constexpr size_t kMinFlatLength = kMinFlatSize - kFlatOverhead;
-
-constexpr size_t AllocatedSizeToTagUnchecked(size_t size) {
-  return (size <= 1024) ? size / 8 : 128 + size / 32 - 1024 / 32;
-}
-
-static_assert(kMinFlatSize / 8 >= FLAT, "");
-static_assert(AllocatedSizeToTagUnchecked(kMaxFlatSize) <= MAX_FLAT_TAG, "");
-
-// Helper functions for rounded div, and rounding to exact sizes.
-constexpr size_t DivUp(size_t n, size_t m) { return (n + m - 1) / m; }
-constexpr size_t RoundUp(size_t n, size_t m) { return DivUp(n, m) * m; }
-
-// Returns the size to the nearest equal or larger value that can be
-// expressed exactly as a tag value.
-inline size_t RoundUpForTag(size_t size) {
-  return RoundUp(size, (size <= 1024) ? 8 : 32);
-}
-
-// Converts the allocated size to a tag, rounding down if the size
-// does not exactly match a 'tag expressible' size value. The result is
-// undefined if the size exceeds the maximum size that can be encoded in
-// a tag, i.e., if size is larger than TagToAllocatedSize(<max tag>).
-inline uint8_t AllocatedSizeToTag(size_t size) {
-  const size_t tag = AllocatedSizeToTagUnchecked(size);
-  assert(tag <= MAX_FLAT_TAG);
-  return static_cast<uint8_t>(tag);
-}
-
-// Converts the provided tag to the corresponding allocated size
-constexpr size_t TagToAllocatedSize(uint8_t tag) {
-  return (tag <= 128) ? (tag * 8) : (1024 + (tag - 128) * 32);
-}
-
-// Converts the provided tag to the corresponding available data length
-constexpr size_t TagToLength(uint8_t tag) {
-  return TagToAllocatedSize(tag) - kFlatOverhead;
-}
-
-// Enforce that kMaxFlatSize maps to a well-known exact tag value.
-static_assert(TagToAllocatedSize(224) == kMaxFlatSize, "Bad tag logic");
-
-struct CordRepFlat : public CordRep {
-  // Creates a new flat node.
-  static CordRepFlat* New(size_t len) {
-    if (len <= kMinFlatLength) {
-      len = kMinFlatLength;
-    } else if (len > kMaxFlatLength) {
-      len = kMaxFlatLength;
-    }
-
-    // Round size up so it matches a size we can exactly express in a tag.
-    const size_t size = RoundUpForTag(len + kFlatOverhead);
-    void* const raw_rep = ::operator new(size);
-    CordRepFlat* rep = new (raw_rep) CordRepFlat();
-    rep->tag = AllocatedSizeToTag(size);
-    return rep;
-  }
-
-  // Deletes a CordRepFlat instance created previously through a call to New().
-  // Flat CordReps are allocated and constructed with raw ::operator new and
-  // placement new, and must be destructed and deallocated accordingly.
-  static void Delete(CordRep*rep) {
-    assert(rep->tag >= FLAT);
-#if defined(__cpp_sized_deallocation)
-    size_t size = TagToAllocatedSize(rep->tag);
-    rep->~CordRep();
-    ::operator delete(rep, size);
-#else
-    rep->~CordRep();
-    ::operator delete(rep);
-#endif
-  }
-
-  // Returns the maximum capacity (payload size) of this instance.
-  size_t Capacity() const { return TagToLength(tag); }
-
-  // Returns the allocated size (payload + overhead) of this instance.
-  size_t AllocatedSize() const { return TagToAllocatedSize(tag); }
-};
-
-}  // namespace cord_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_CORD_REP_FLAT_H_
diff --git a/third_party/abseil/absl/strings/internal/escaping.cc b/third_party/abseil/absl/strings/internal/escaping.cc
deleted file mode 100644
index c527128..0000000
--- a/third_party/abseil/absl/strings/internal/escaping.cc
+++ /dev/null
@@ -1,180 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/escaping.h"
-
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-const char kBase64Chars[] =
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-size_t CalculateBase64EscapedLenInternal(size_t input_len, bool do_padding) {
-  // Base64 encodes three bytes of input at a time. If the input is not
-  // divisible by three, we pad as appropriate.
-  //
-  // (from https://tools.ietf.org/html/rfc3548)
-  // Special processing is performed if fewer than 24 bits are available
-  // at the end of the data being encoded.  A full encoding quantum is
-  // always completed at the end of a quantity.  When fewer than 24 input
-  // bits are available in an input group, zero bits are added (on the
-  // right) to form an integral number of 6-bit groups.  Padding at the
-  // end of the data is performed using the '=' character.  Since all base
-  // 64 input is an integral number of octets, only the following cases
-  // can arise:
-
-  // Base64 encodes each three bytes of input into four bytes of output.
-  size_t len = (input_len / 3) * 4;
-
-  if (input_len % 3 == 0) {
-    // (from https://tools.ietf.org/html/rfc3548)
-    // (1) the final quantum of encoding input is an integral multiple of 24
-    // bits; here, the final unit of encoded output will be an integral
-    // multiple of 4 characters with no "=" padding,
-  } else if (input_len % 3 == 1) {
-    // (from https://tools.ietf.org/html/rfc3548)
-    // (2) the final quantum of encoding input is exactly 8 bits; here, the
-    // final unit of encoded output will be two characters followed by two
-    // "=" padding characters, or
-    len += 2;
-    if (do_padding) {
-      len += 2;
-    }
-  } else {  // (input_len % 3 == 2)
-    // (from https://tools.ietf.org/html/rfc3548)
-    // (3) the final quantum of encoding input is exactly 16 bits; here, the
-    // final unit of encoded output will be three characters followed by one
-    // "=" padding character.
-    len += 3;
-    if (do_padding) {
-      len += 1;
-    }
-  }
-
-  assert(len >= input_len);  // make sure we didn't overflow
-  return len;
-}
-
-size_t Base64EscapeInternal(const unsigned char* src, size_t szsrc, char* dest,
-                            size_t szdest, const char* base64,
-                            bool do_padding) {
-  static const char kPad64 = '=';
-
-  if (szsrc * 4 > szdest * 3) return 0;
-
-  char* cur_dest = dest;
-  const unsigned char* cur_src = src;
-
-  char* const limit_dest = dest + szdest;
-  const unsigned char* const limit_src = src + szsrc;
-
-  // Three bytes of data encodes to four characters of cyphertext.
-  // So we can pump through three-byte chunks atomically.
-  if (szsrc >= 3) {                    // "limit_src - 3" is UB if szsrc < 3.
-    while (cur_src < limit_src - 3) {  // While we have >= 32 bits.
-      uint32_t in = absl::big_endian::Load32(cur_src) >> 8;
-
-      cur_dest[0] = base64[in >> 18];
-      in &= 0x3FFFF;
-      cur_dest[1] = base64[in >> 12];
-      in &= 0xFFF;
-      cur_dest[2] = base64[in >> 6];
-      in &= 0x3F;
-      cur_dest[3] = base64[in];
-
-      cur_dest += 4;
-      cur_src += 3;
-    }
-  }
-  // To save time, we didn't update szdest or szsrc in the loop.  So do it now.
-  szdest = limit_dest - cur_dest;
-  szsrc = limit_src - cur_src;
-
-  /* now deal with the tail (<=3 bytes) */
-  switch (szsrc) {
-    case 0:
-      // Nothing left; nothing more to do.
-      break;
-    case 1: {
-      // One byte left: this encodes to two characters, and (optionally)
-      // two pad characters to round out the four-character cypherblock.
-      if (szdest < 2) return 0;
-      uint32_t in = cur_src[0];
-      cur_dest[0] = base64[in >> 2];
-      in &= 0x3;
-      cur_dest[1] = base64[in << 4];
-      cur_dest += 2;
-      szdest -= 2;
-      if (do_padding) {
-        if (szdest < 2) return 0;
-        cur_dest[0] = kPad64;
-        cur_dest[1] = kPad64;
-        cur_dest += 2;
-        szdest -= 2;
-      }
-      break;
-    }
-    case 2: {
-      // Two bytes left: this encodes to three characters, and (optionally)
-      // one pad character to round out the four-character cypherblock.
-      if (szdest < 3) return 0;
-      uint32_t in = absl::big_endian::Load16(cur_src);
-      cur_dest[0] = base64[in >> 10];
-      in &= 0x3FF;
-      cur_dest[1] = base64[in >> 4];
-      in &= 0x00F;
-      cur_dest[2] = base64[in << 2];
-      cur_dest += 3;
-      szdest -= 3;
-      if (do_padding) {
-        if (szdest < 1) return 0;
-        cur_dest[0] = kPad64;
-        cur_dest += 1;
-        szdest -= 1;
-      }
-      break;
-    }
-    case 3: {
-      // Three bytes left: same as in the big loop above.  We can't do this in
-      // the loop because the loop above always reads 4 bytes, and the fourth
-      // byte is past the end of the input.
-      if (szdest < 4) return 0;
-      uint32_t in = (cur_src[0] << 16) + absl::big_endian::Load16(cur_src + 1);
-      cur_dest[0] = base64[in >> 18];
-      in &= 0x3FFFF;
-      cur_dest[1] = base64[in >> 12];
-      in &= 0xFFF;
-      cur_dest[2] = base64[in >> 6];
-      in &= 0x3F;
-      cur_dest[3] = base64[in];
-      cur_dest += 4;
-      szdest -= 4;
-      break;
-    }
-    default:
-      // Should not be reached: blocks of 4 bytes are handled
-      // in the while loop before this switch statement.
-      ABSL_RAW_LOG(FATAL, "Logic problem? szsrc = %zu", szsrc);
-      break;
-  }
-  return (cur_dest - dest);
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/escaping.h b/third_party/abseil/absl/strings/internal/escaping.h
deleted file mode 100644
index 6a9ce60..0000000
--- a/third_party/abseil/absl/strings/internal/escaping.h
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_ESCAPING_H_
-#define ABSL_STRINGS_INTERNAL_ESCAPING_H_
-
-#include <cassert>
-
-#include "absl/strings/internal/resize_uninitialized.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-ABSL_CONST_INIT extern const char kBase64Chars[];
-
-// Calculates how long a string will be when it is base64 encoded given its
-// length and whether or not the result should be padded.
-size_t CalculateBase64EscapedLenInternal(size_t input_len, bool do_padding);
-
-// Base64-encodes `src` using the alphabet provided in `base64` and writes the
-// result to `dest`. If `do_padding` is true, `dest` is padded with '=' chars
-// until its length is a multiple of 3. Returns the length of `dest`.
-size_t Base64EscapeInternal(const unsigned char* src, size_t szsrc, char* dest,
-                            size_t szdest, const char* base64, bool do_padding);
-
-// Base64-encodes `src` using the alphabet provided in `base64` and writes the
-// result to `dest`. If `do_padding` is true, `dest` is padded with '=' chars
-// until its length is a multiple of 3.
-template <typename String>
-void Base64EscapeInternal(const unsigned char* src, size_t szsrc, String* dest,
-                          bool do_padding, const char* base64_chars) {
-  const size_t calc_escaped_size =
-      CalculateBase64EscapedLenInternal(szsrc, do_padding);
-  STLStringResizeUninitialized(dest, calc_escaped_size);
-
-  const size_t escaped_len = Base64EscapeInternal(
-      src, szsrc, &(*dest)[0], dest->size(), base64_chars, do_padding);
-  assert(calc_escaped_size == escaped_len);
-  dest->erase(escaped_len);
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_ESCAPING_H_
diff --git a/third_party/abseil/absl/strings/internal/escaping_test_common.h b/third_party/abseil/absl/strings/internal/escaping_test_common.h
deleted file mode 100644
index 7b18017..0000000
--- a/third_party/abseil/absl/strings/internal/escaping_test_common.h
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This test contains common things needed by both escaping_test.cc and
-// escaping_benchmark.cc.
-
-#ifndef ABSL_STRINGS_INTERNAL_ESCAPING_TEST_COMMON_H_
-#define ABSL_STRINGS_INTERNAL_ESCAPING_TEST_COMMON_H_
-
-#include <array>
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-struct base64_testcase {
-  absl::string_view plaintext;
-  absl::string_view cyphertext;
-};
-
-inline const std::array<base64_testcase, 5>& base64_strings() {
-  static const std::array<base64_testcase, 5> testcase{{
-      // Some google quotes
-      // Cyphertext created with "uuencode (GNU sharutils) 4.6.3"
-      // (Note that we're testing the websafe encoding, though, so if
-      // you add messages, be sure to run "tr -- '+/' '-_'" on the output)
-      { "I was always good at math and science, and I never realized "
-        "that was unusual or somehow undesirable. So one of the things "
-        "I care a lot about is helping to remove that stigma, "
-        "to show girls that you can be feminine, you can like the things "
-        "that girls like, but you can also be really good at technology. "
-        "You can be really good at building things."
-        " - Marissa Meyer, Newsweek, 2010-12-22" "\n",
-
-        "SSB3YXMgYWx3YXlzIGdvb2QgYXQgbWF0aCBhbmQgc2NpZW5jZSwgYW5kIEkg"
-        "bmV2ZXIgcmVhbGl6ZWQgdGhhdCB3YXMgdW51c3VhbCBvciBzb21laG93IHVu"
-        "ZGVzaXJhYmxlLiBTbyBvbmUgb2YgdGhlIHRoaW5ncyBJIGNhcmUgYSBsb3Qg"
-        "YWJvdXQgaXMgaGVscGluZyB0byByZW1vdmUgdGhhdCBzdGlnbWEsIHRvIHNo"
-        "b3cgZ2lybHMgdGhhdCB5b3UgY2FuIGJlIGZlbWluaW5lLCB5b3UgY2FuIGxp"
-        "a2UgdGhlIHRoaW5ncyB0aGF0IGdpcmxzIGxpa2UsIGJ1dCB5b3UgY2FuIGFs"
-        "c28gYmUgcmVhbGx5IGdvb2QgYXQgdGVjaG5vbG9neS4gWW91IGNhbiBiZSBy"
-        "ZWFsbHkgZ29vZCBhdCBidWlsZGluZyB0aGluZ3MuIC0gTWFyaXNzYSBNZXll"
-        "ciwgTmV3c3dlZWssIDIwMTAtMTItMjIK" },
-
-      { "Typical first year for a new cluster: "
-        "~0.5 overheating "
-        "~1 PDU failure "
-        "~1 rack-move "
-        "~1 network rewiring "
-        "~20 rack failures "
-        "~5 racks go wonky "
-        "~8 network maintenances "
-        "~12 router reloads "
-        "~3 router failures "
-        "~dozens of minor 30-second blips for dns "
-        "~1000 individual machine failures "
-        "~thousands of hard drive failures "
-        "slow disks, bad memory, misconfigured machines, flaky machines, etc."
-        " - Jeff Dean, The Joys of Real Hardware" "\n",
-
-        "VHlwaWNhbCBmaXJzdCB5ZWFyIGZvciBhIG5ldyBjbHVzdGVyOiB-MC41IG92"
-        "ZXJoZWF0aW5nIH4xIFBEVSBmYWlsdXJlIH4xIHJhY2stbW92ZSB-MSBuZXR3"
-        "b3JrIHJld2lyaW5nIH4yMCByYWNrIGZhaWx1cmVzIH41IHJhY2tzIGdvIHdv"
-        "bmt5IH44IG5ldHdvcmsgbWFpbnRlbmFuY2VzIH4xMiByb3V0ZXIgcmVsb2Fk"
-        "cyB-MyByb3V0ZXIgZmFpbHVyZXMgfmRvemVucyBvZiBtaW5vciAzMC1zZWNv"
-        "bmQgYmxpcHMgZm9yIGRucyB-MTAwMCBpbmRpdmlkdWFsIG1hY2hpbmUgZmFp"
-        "bHVyZXMgfnRob3VzYW5kcyBvZiBoYXJkIGRyaXZlIGZhaWx1cmVzIHNsb3cg"
-        "ZGlza3MsIGJhZCBtZW1vcnksIG1pc2NvbmZpZ3VyZWQgbWFjaGluZXMsIGZs"
-        "YWt5IG1hY2hpbmVzLCBldGMuIC0gSmVmZiBEZWFuLCBUaGUgSm95cyBvZiBS"
-        "ZWFsIEhhcmR3YXJlCg" },
-
-      { "I'm the head of the webspam team at Google.  "
-        "That means that if you type your name into Google and get porn back, "
-        "it's my fault. Unless you're a porn star, in which case porn is a "
-        "completely reasonable response."
-        " - Matt Cutts, Google Plus" "\n",
-
-        "SSdtIHRoZSBoZWFkIG9mIHRoZSB3ZWJzcGFtIHRlYW0gYXQgR29vZ2xlLiAg"
-        "VGhhdCBtZWFucyB0aGF0IGlmIHlvdSB0eXBlIHlvdXIgbmFtZSBpbnRvIEdv"
-        "b2dsZSBhbmQgZ2V0IHBvcm4gYmFjaywgaXQncyBteSBmYXVsdC4gVW5sZXNz"
-        "IHlvdSdyZSBhIHBvcm4gc3RhciwgaW4gd2hpY2ggY2FzZSBwb3JuIGlzIGEg"
-        "Y29tcGxldGVseSByZWFzb25hYmxlIHJlc3BvbnNlLiAtIE1hdHQgQ3V0dHMs"
-        "IEdvb2dsZSBQbHVzCg" },
-
-      { "It will still be a long time before machines approach human "
-        "intelligence. "
-        "But luckily, machines don't actually have to be intelligent; "
-        "they just have to fake it. Access to a wealth of information, "
-        "combined with a rudimentary decision-making capacity, "
-        "can often be almost as useful. Of course, the results are better yet "
-        "when coupled with intelligence. A reference librarian with access to "
-        "a good search engine is a formidable tool."
-        " - Craig Silverstein, Siemens Pictures of the Future, Spring 2004"
-        "\n",
-
-        "SXQgd2lsbCBzdGlsbCBiZSBhIGxvbmcgdGltZSBiZWZvcmUgbWFjaGluZXMg"
-        "YXBwcm9hY2ggaHVtYW4gaW50ZWxsaWdlbmNlLiBCdXQgbHVja2lseSwgbWFj"
-        "aGluZXMgZG9uJ3QgYWN0dWFsbHkgaGF2ZSB0byBiZSBpbnRlbGxpZ2VudDsg"
-        "dGhleSBqdXN0IGhhdmUgdG8gZmFrZSBpdC4gQWNjZXNzIHRvIGEgd2VhbHRo"
-        "IG9mIGluZm9ybWF0aW9uLCBjb21iaW5lZCB3aXRoIGEgcnVkaW1lbnRhcnkg"
-        "ZGVjaXNpb24tbWFraW5nIGNhcGFjaXR5LCBjYW4gb2Z0ZW4gYmUgYWxtb3N0"
-        "IGFzIHVzZWZ1bC4gT2YgY291cnNlLCB0aGUgcmVzdWx0cyBhcmUgYmV0dGVy"
-        "IHlldCB3aGVuIGNvdXBsZWQgd2l0aCBpbnRlbGxpZ2VuY2UuIEEgcmVmZXJl"
-        "bmNlIGxpYnJhcmlhbiB3aXRoIGFjY2VzcyB0byBhIGdvb2Qgc2VhcmNoIGVu"
-        "Z2luZSBpcyBhIGZvcm1pZGFibGUgdG9vbC4gLSBDcmFpZyBTaWx2ZXJzdGVp"
-        "biwgU2llbWVucyBQaWN0dXJlcyBvZiB0aGUgRnV0dXJlLCBTcHJpbmcgMjAw"
-        "NAo" },
-
-      // Degenerate edge case
-      { "",
-        "" },
-  }};
-
-  return testcase;
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_ESCAPING_TEST_COMMON_H_
diff --git a/third_party/abseil/absl/strings/internal/memutil.cc b/third_party/abseil/absl/strings/internal/memutil.cc
deleted file mode 100644
index 2519c68..0000000
--- a/third_party/abseil/absl/strings/internal/memutil.cc
+++ /dev/null
@@ -1,112 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/memutil.h"
-
-#include <cstdlib>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-int memcasecmp(const char* s1, const char* s2, size_t len) {
-  const unsigned char* us1 = reinterpret_cast<const unsigned char*>(s1);
-  const unsigned char* us2 = reinterpret_cast<const unsigned char*>(s2);
-
-  for (size_t i = 0; i < len; i++) {
-    const int diff =
-        int{static_cast<unsigned char>(absl::ascii_tolower(us1[i]))} -
-        int{static_cast<unsigned char>(absl::ascii_tolower(us2[i]))};
-    if (diff != 0) return diff;
-  }
-  return 0;
-}
-
-char* memdup(const char* s, size_t slen) {
-  void* copy;
-  if ((copy = malloc(slen)) == nullptr) return nullptr;
-  memcpy(copy, s, slen);
-  return reinterpret_cast<char*>(copy);
-}
-
-char* memrchr(const char* s, int c, size_t slen) {
-  for (const char* e = s + slen - 1; e >= s; e--) {
-    if (*e == c) return const_cast<char*>(e);
-  }
-  return nullptr;
-}
-
-size_t memspn(const char* s, size_t slen, const char* accept) {
-  const char* p = s;
-  const char* spanp;
-  char c, sc;
-
-cont:
-  c = *p++;
-  if (slen-- == 0) return p - 1 - s;
-  for (spanp = accept; (sc = *spanp++) != '\0';)
-    if (sc == c) goto cont;
-  return p - 1 - s;
-}
-
-size_t memcspn(const char* s, size_t slen, const char* reject) {
-  const char* p = s;
-  const char* spanp;
-  char c, sc;
-
-  while (slen-- != 0) {
-    c = *p++;
-    for (spanp = reject; (sc = *spanp++) != '\0';)
-      if (sc == c) return p - 1 - s;
-  }
-  return p - s;
-}
-
-char* mempbrk(const char* s, size_t slen, const char* accept) {
-  const char* scanp;
-  int sc;
-
-  for (; slen; ++s, --slen) {
-    for (scanp = accept; (sc = *scanp++) != '\0';)
-      if (sc == *s) return const_cast<char*>(s);
-  }
-  return nullptr;
-}
-
-// This is significantly faster for case-sensitive matches with very
-// few possible matches.  See unit test for benchmarks.
-const char* memmatch(const char* phaystack, size_t haylen, const char* pneedle,
-                     size_t neelen) {
-  if (0 == neelen) {
-    return phaystack;  // even if haylen is 0
-  }
-  if (haylen < neelen) return nullptr;
-
-  const char* match;
-  const char* hayend = phaystack + haylen - neelen + 1;
-  // A static cast is used here to work around the fact that memchr returns
-  // a void* on Posix-compliant systems and const void* on Windows.
-  while ((match = static_cast<const char*>(
-              memchr(phaystack, pneedle[0], hayend - phaystack)))) {
-    if (memcmp(match, pneedle, neelen) == 0)
-      return match;
-    else
-      phaystack = match + 1;
-  }
-  return nullptr;
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/memutil.h b/third_party/abseil/absl/strings/internal/memutil.h
deleted file mode 100644
index 9ad0535..0000000
--- a/third_party/abseil/absl/strings/internal/memutil.h
+++ /dev/null
@@ -1,148 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// These routines provide mem versions of standard C string routines,
-// such as strpbrk.  They function exactly the same as the str versions,
-// so if you wonder what they are, replace the word "mem" by
-// "str" and check out the man page.  I could return void*, as the
-// strutil.h mem*() routines tend to do, but I return char* instead
-// since this is by far the most common way these functions are called.
-//
-// The difference between the mem and str versions is the mem version
-// takes a pointer and a length, rather than a '\0'-terminated string.
-// The memcase* routines defined here assume the locale is "C"
-// (they use absl::ascii_tolower instead of tolower).
-//
-// These routines are based on the BSD library.
-//
-// Here's a list of routines from string.h, and their mem analogues.
-// Functions in lowercase are defined in string.h; those in UPPERCASE
-// are defined here:
-//
-// strlen                  --
-// strcat strncat          MEMCAT
-// strcpy strncpy          memcpy
-// --                      memccpy   (very cool function, btw)
-// --                      memmove
-// --                      memset
-// strcmp strncmp          memcmp
-// strcasecmp strncasecmp  MEMCASECMP
-// strchr                  memchr
-// strcoll                 --
-// strxfrm                 --
-// strdup strndup          MEMDUP
-// strrchr                 MEMRCHR
-// strspn                  MEMSPN
-// strcspn                 MEMCSPN
-// strpbrk                 MEMPBRK
-// strstr                  MEMSTR MEMMEM
-// (g)strcasestr           MEMCASESTR MEMCASEMEM
-// strtok                  --
-// strprefix               MEMPREFIX      (strprefix is from strutil.h)
-// strcaseprefix           MEMCASEPREFIX  (strcaseprefix is from strutil.h)
-// strsuffix               MEMSUFFIX      (strsuffix is from strutil.h)
-// strcasesuffix           MEMCASESUFFIX  (strcasesuffix is from strutil.h)
-// --                      MEMIS
-// --                      MEMCASEIS
-// strcount                MEMCOUNT       (strcount is from strutil.h)
-
-#ifndef ABSL_STRINGS_INTERNAL_MEMUTIL_H_
-#define ABSL_STRINGS_INTERNAL_MEMUTIL_H_
-
-#include <cstddef>
-#include <cstring>
-
-#include "absl/base/port.h"  // disable some warnings on Windows
-#include "absl/strings/ascii.h"  // for absl::ascii_tolower
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-inline char* memcat(char* dest, size_t destlen, const char* src,
-                    size_t srclen) {
-  return reinterpret_cast<char*>(memcpy(dest + destlen, src, srclen));
-}
-
-int memcasecmp(const char* s1, const char* s2, size_t len);
-char* memdup(const char* s, size_t slen);
-char* memrchr(const char* s, int c, size_t slen);
-size_t memspn(const char* s, size_t slen, const char* accept);
-size_t memcspn(const char* s, size_t slen, const char* reject);
-char* mempbrk(const char* s, size_t slen, const char* accept);
-
-// This is for internal use only.  Don't call this directly
-template <bool case_sensitive>
-const char* int_memmatch(const char* haystack, size_t haylen,
-                         const char* needle, size_t neelen) {
-  if (0 == neelen) {
-    return haystack;  // even if haylen is 0
-  }
-  const char* hayend = haystack + haylen;
-  const char* needlestart = needle;
-  const char* needleend = needlestart + neelen;
-
-  for (; haystack < hayend; ++haystack) {
-    char hay = case_sensitive
-                   ? *haystack
-                   : absl::ascii_tolower(static_cast<unsigned char>(*haystack));
-    char nee = case_sensitive
-                   ? *needle
-                   : absl::ascii_tolower(static_cast<unsigned char>(*needle));
-    if (hay == nee) {
-      if (++needle == needleend) {
-        return haystack + 1 - neelen;
-      }
-    } else if (needle != needlestart) {
-      // must back up haystack in case a prefix matched (find "aab" in "aaab")
-      haystack -= needle - needlestart;  // for loop will advance one more
-      needle = needlestart;
-    }
-  }
-  return nullptr;
-}
-
-// These are the guys you can call directly
-inline const char* memstr(const char* phaystack, size_t haylen,
-                          const char* pneedle) {
-  return int_memmatch<true>(phaystack, haylen, pneedle, strlen(pneedle));
-}
-
-inline const char* memcasestr(const char* phaystack, size_t haylen,
-                              const char* pneedle) {
-  return int_memmatch<false>(phaystack, haylen, pneedle, strlen(pneedle));
-}
-
-inline const char* memmem(const char* phaystack, size_t haylen,
-                          const char* pneedle, size_t needlelen) {
-  return int_memmatch<true>(phaystack, haylen, pneedle, needlelen);
-}
-
-inline const char* memcasemem(const char* phaystack, size_t haylen,
-                              const char* pneedle, size_t needlelen) {
-  return int_memmatch<false>(phaystack, haylen, pneedle, needlelen);
-}
-
-// This is significantly faster for case-sensitive matches with very
-// few possible matches.  See unit test for benchmarks.
-const char* memmatch(const char* phaystack, size_t haylen, const char* pneedle,
-                     size_t neelen);
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_MEMUTIL_H_
diff --git a/third_party/abseil/absl/strings/internal/memutil_benchmark.cc b/third_party/abseil/absl/strings/internal/memutil_benchmark.cc
deleted file mode 100644
index dc95c3e..0000000
--- a/third_party/abseil/absl/strings/internal/memutil_benchmark.cc
+++ /dev/null
@@ -1,323 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/memutil.h"
-
-#include <algorithm>
-#include <cstdlib>
-
-#include "benchmark/benchmark.h"
-#include "absl/strings/ascii.h"
-
-// We fill the haystack with aaaaaaaaaaaaaaaaaa...aaaab.
-// That gives us:
-// - an easy search: 'b'
-// - a medium search: 'ab'.  That means every letter is a possible match.
-// - a pathological search: 'aaaaaa.......aaaaab' (half as many a's as haytack)
-// We benchmark case-sensitive and case-insensitive versions of
-// three memmem implementations:
-// - memmem() from memutil.h
-// - search() from STL
-// - memmatch(), a custom implementation using memchr and memcmp.
-// Here are sample results:
-//
-// Run on (12 X 3800 MHz CPU s)
-// CPU Caches:
-//   L1 Data 32K (x6)
-//   L1 Instruction 32K (x6)
-//   L2 Unified 256K (x6)
-//   L3 Unified 15360K (x1)
-// ----------------------------------------------------------------
-// Benchmark                           Time          CPU Iterations
-// ----------------------------------------------------------------
-// BM_Memmem                        3583 ns      3582 ns     196469  2.59966GB/s
-// BM_MemmemMedium                 13743 ns     13742 ns      50901  693.986MB/s
-// BM_MemmemPathological        13695030 ns  13693977 ns         51  713.133kB/s
-// BM_Memcasemem                    3299 ns      3299 ns     212942  2.82309GB/s
-// BM_MemcasememMedium             16407 ns     16406 ns      42170  581.309MB/s
-// BM_MemcasememPathological    17267745 ns  17266030 ns         41  565.598kB/s
-// BM_Search                        1610 ns      1609 ns     431321  5.78672GB/s
-// BM_SearchMedium                 11111 ns     11110 ns      63001  858.414MB/s
-// BM_SearchPathological        12117390 ns  12116397 ns         58  805.984kB/s
-// BM_Searchcase                    3081 ns      3081 ns     229949  3.02313GB/s
-// BM_SearchcaseMedium             16003 ns     16001 ns      44170  595.998MB/s
-// BM_SearchcasePathological    15823413 ns  15821909 ns         44  617.222kB/s
-// BM_Memmatch                       197 ns       197 ns    3584225  47.2951GB/s
-// BM_MemmatchMedium               52333 ns     52329 ns      13280  182.244MB/s
-// BM_MemmatchPathological        659799 ns    659727 ns       1058  14.4556MB/s
-// BM_Memcasematch                  5460 ns      5460 ns     127606  1.70586GB/s
-// BM_MemcasematchMedium           32861 ns     32857 ns      21258  290.248MB/s
-// BM_MemcasematchPathological  15154243 ns  15153089 ns         46  644.464kB/s
-// BM_MemmemStartup                    5 ns         5 ns  150821500
-// BM_SearchStartup                    5 ns         5 ns  150644203
-// BM_MemmatchStartup                  7 ns         7 ns   97068802
-//
-// Conclusions:
-//
-// The following recommendations are based on the sample results above. However,
-// we have found that the performance of STL search can vary significantly
-// depending on compiler and standard library implementation. We recommend you
-// run the benchmarks for yourself on relevant platforms.
-//
-// If you need case-insensitive, STL search is slightly better than memmem for
-// all cases.
-//
-// Case-sensitive is more subtle:
-// Custom memmatch is _very_ fast at scanning, so if you have very few possible
-// matches in your haystack, that's the way to go. Performance drops
-// significantly with more matches.
-//
-// STL search is slightly faster than memmem in the medium and pathological
-// benchmarks. However, the performance of memmem is currently more dependable
-// across platforms and build configurations.
-
-namespace {
-
-constexpr int kHaystackSize = 10000;
-constexpr int64_t kHaystackSize64 = kHaystackSize;
-const char* MakeHaystack() {
-  char* haystack = new char[kHaystackSize];
-  for (int i = 0; i < kHaystackSize - 1; ++i) haystack[i] = 'a';
-  haystack[kHaystackSize - 1] = 'b';
-  return haystack;
-}
-const char* const kHaystack = MakeHaystack();
-
-void BM_Memmem(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::strings_internal::memmem(kHaystack, kHaystackSize, "b", 1));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_Memmem);
-
-void BM_MemmemMedium(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::strings_internal::memmem(kHaystack, kHaystackSize, "ab", 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemmemMedium);
-
-void BM_MemmemPathological(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::strings_internal::memmem(
-        kHaystack, kHaystackSize, kHaystack + kHaystackSize / 2,
-        kHaystackSize - kHaystackSize / 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemmemPathological);
-
-void BM_Memcasemem(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::strings_internal::memcasemem(kHaystack, kHaystackSize, "b", 1));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_Memcasemem);
-
-void BM_MemcasememMedium(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::strings_internal::memcasemem(kHaystack, kHaystackSize, "ab", 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemcasememMedium);
-
-void BM_MemcasememPathological(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::strings_internal::memcasemem(
-        kHaystack, kHaystackSize, kHaystack + kHaystackSize / 2,
-        kHaystackSize - kHaystackSize / 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemcasememPathological);
-
-bool case_eq(const char a, const char b) {
-  return absl::ascii_tolower(a) == absl::ascii_tolower(b);
-}
-
-void BM_Search(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::search(kHaystack, kHaystack + kHaystackSize,
-                                         kHaystack + kHaystackSize - 1,
-                                         kHaystack + kHaystackSize));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_Search);
-
-void BM_SearchMedium(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::search(kHaystack, kHaystack + kHaystackSize,
-                                         kHaystack + kHaystackSize - 2,
-                                         kHaystack + kHaystackSize));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_SearchMedium);
-
-void BM_SearchPathological(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::search(kHaystack, kHaystack + kHaystackSize,
-                                         kHaystack + kHaystackSize / 2,
-                                         kHaystack + kHaystackSize));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_SearchPathological);
-
-void BM_Searchcase(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::search(kHaystack, kHaystack + kHaystackSize,
-                                         kHaystack + kHaystackSize - 1,
-                                         kHaystack + kHaystackSize, case_eq));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_Searchcase);
-
-void BM_SearchcaseMedium(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::search(kHaystack, kHaystack + kHaystackSize,
-                                         kHaystack + kHaystackSize - 2,
-                                         kHaystack + kHaystackSize, case_eq));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_SearchcaseMedium);
-
-void BM_SearchcasePathological(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::search(kHaystack, kHaystack + kHaystackSize,
-                                         kHaystack + kHaystackSize / 2,
-                                         kHaystack + kHaystackSize, case_eq));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_SearchcasePathological);
-
-char* memcasechr(const char* s, int c, size_t slen) {
-  c = absl::ascii_tolower(c);
-  for (; slen; ++s, --slen) {
-    if (absl::ascii_tolower(*s) == c) return const_cast<char*>(s);
-  }
-  return nullptr;
-}
-
-const char* memcasematch(const char* phaystack, size_t haylen,
-                         const char* pneedle, size_t neelen) {
-  if (0 == neelen) {
-    return phaystack;  // even if haylen is 0
-  }
-  if (haylen < neelen) return nullptr;
-
-  const char* match;
-  const char* hayend = phaystack + haylen - neelen + 1;
-  while ((match = static_cast<char*>(
-              memcasechr(phaystack, pneedle[0], hayend - phaystack)))) {
-    if (absl::strings_internal::memcasecmp(match, pneedle, neelen) == 0)
-      return match;
-    else
-      phaystack = match + 1;
-  }
-  return nullptr;
-}
-
-void BM_Memmatch(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::strings_internal::memmatch(kHaystack, kHaystackSize, "b", 1));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_Memmatch);
-
-void BM_MemmatchMedium(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::strings_internal::memmatch(kHaystack, kHaystackSize, "ab", 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemmatchMedium);
-
-void BM_MemmatchPathological(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::strings_internal::memmatch(
-        kHaystack, kHaystackSize, kHaystack + kHaystackSize / 2,
-        kHaystackSize - kHaystackSize / 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemmatchPathological);
-
-void BM_Memcasematch(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(memcasematch(kHaystack, kHaystackSize, "b", 1));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_Memcasematch);
-
-void BM_MemcasematchMedium(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(memcasematch(kHaystack, kHaystackSize, "ab", 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemcasematchMedium);
-
-void BM_MemcasematchPathological(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(memcasematch(kHaystack, kHaystackSize,
-                                          kHaystack + kHaystackSize / 2,
-                                          kHaystackSize - kHaystackSize / 2));
-  }
-  state.SetBytesProcessed(kHaystackSize64 * state.iterations());
-}
-BENCHMARK(BM_MemcasematchPathological);
-
-void BM_MemmemStartup(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::strings_internal::memmem(
-        kHaystack + kHaystackSize - 10, 10, kHaystack + kHaystackSize - 1, 1));
-  }
-}
-BENCHMARK(BM_MemmemStartup);
-
-void BM_SearchStartup(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        std::search(kHaystack + kHaystackSize - 10, kHaystack + kHaystackSize,
-                    kHaystack + kHaystackSize - 1, kHaystack + kHaystackSize));
-  }
-}
-BENCHMARK(BM_SearchStartup);
-
-void BM_MemmatchStartup(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(absl::strings_internal::memmatch(
-        kHaystack + kHaystackSize - 10, 10, kHaystack + kHaystackSize - 1, 1));
-  }
-}
-BENCHMARK(BM_MemmatchStartup);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/memutil_test.cc b/third_party/abseil/absl/strings/internal/memutil_test.cc
deleted file mode 100644
index d8681dd..0000000
--- a/third_party/abseil/absl/strings/internal/memutil_test.cc
+++ /dev/null
@@ -1,179 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Unit test for memutil.cc
-
-#include "absl/strings/internal/memutil.h"
-
-#include <cstdlib>
-
-#include "gtest/gtest.h"
-#include "absl/strings/ascii.h"
-
-namespace {
-
-static char* memcasechr(const char* s, int c, size_t slen) {
-  c = absl::ascii_tolower(c);
-  for (; slen; ++s, --slen) {
-    if (absl::ascii_tolower(*s) == c) return const_cast<char*>(s);
-  }
-  return nullptr;
-}
-
-static const char* memcasematch(const char* phaystack, size_t haylen,
-                                const char* pneedle, size_t neelen) {
-  if (0 == neelen) {
-    return phaystack;  // even if haylen is 0
-  }
-  if (haylen < neelen) return nullptr;
-
-  const char* match;
-  const char* hayend = phaystack + haylen - neelen + 1;
-  while ((match = static_cast<char*>(
-              memcasechr(phaystack, pneedle[0], hayend - phaystack)))) {
-    if (absl::strings_internal::memcasecmp(match, pneedle, neelen) == 0)
-      return match;
-    else
-      phaystack = match + 1;
-  }
-  return nullptr;
-}
-
-TEST(MemUtilTest, AllTests) {
-  // check memutil functions
-  char a[1000];
-  absl::strings_internal::memcat(a, 0, "hello", sizeof("hello") - 1);
-  absl::strings_internal::memcat(a, 5, " there", sizeof(" there") - 1);
-
-  EXPECT_EQ(absl::strings_internal::memcasecmp(a, "heLLO there",
-                                               sizeof("hello there") - 1),
-            0);
-  EXPECT_EQ(absl::strings_internal::memcasecmp(a, "heLLO therf",
-                                               sizeof("hello there") - 1),
-            -1);
-  EXPECT_EQ(absl::strings_internal::memcasecmp(a, "heLLO therf",
-                                               sizeof("hello there") - 2),
-            0);
-  EXPECT_EQ(absl::strings_internal::memcasecmp(a, "whatever", 0), 0);
-
-  char* p = absl::strings_internal::memdup("hello", 5);
-  free(p);
-
-  p = absl::strings_internal::memrchr("hello there", 'e',
-                                      sizeof("hello there") - 1);
-  EXPECT_TRUE(p && p[-1] == 'r');
-  p = absl::strings_internal::memrchr("hello there", 'e',
-                                      sizeof("hello there") - 2);
-  EXPECT_TRUE(p && p[-1] == 'h');
-  p = absl::strings_internal::memrchr("hello there", 'u',
-                                      sizeof("hello there") - 1);
-  EXPECT_TRUE(p == nullptr);
-
-  int len = absl::strings_internal::memspn("hello there",
-                                           sizeof("hello there") - 1, "hole");
-  EXPECT_EQ(len, sizeof("hello") - 1);
-  len = absl::strings_internal::memspn("hello there", sizeof("hello there") - 1,
-                                       "u");
-  EXPECT_EQ(len, 0);
-  len = absl::strings_internal::memspn("hello there", sizeof("hello there") - 1,
-                                       "");
-  EXPECT_EQ(len, 0);
-  len = absl::strings_internal::memspn("hello there", sizeof("hello there") - 1,
-                                       "trole h");
-  EXPECT_EQ(len, sizeof("hello there") - 1);
-  len = absl::strings_internal::memspn("hello there!",
-                                       sizeof("hello there!") - 1, "trole h");
-  EXPECT_EQ(len, sizeof("hello there") - 1);
-  len = absl::strings_internal::memspn("hello there!",
-                                       sizeof("hello there!") - 2, "trole h!");
-  EXPECT_EQ(len, sizeof("hello there!") - 2);
-
-  len = absl::strings_internal::memcspn("hello there",
-                                        sizeof("hello there") - 1, "leho");
-  EXPECT_EQ(len, 0);
-  len = absl::strings_internal::memcspn("hello there",
-                                        sizeof("hello there") - 1, "u");
-  EXPECT_EQ(len, sizeof("hello there") - 1);
-  len = absl::strings_internal::memcspn("hello there",
-                                        sizeof("hello there") - 1, "");
-  EXPECT_EQ(len, sizeof("hello there") - 1);
-  len = absl::strings_internal::memcspn("hello there",
-                                        sizeof("hello there") - 1, " ");
-  EXPECT_EQ(len, 5);
-
-  p = absl::strings_internal::mempbrk("hello there", sizeof("hello there") - 1,
-                                      "leho");
-  EXPECT_TRUE(p && p[1] == 'e' && p[2] == 'l');
-  p = absl::strings_internal::mempbrk("hello there", sizeof("hello there") - 1,
-                                      "nu");
-  EXPECT_TRUE(p == nullptr);
-  p = absl::strings_internal::mempbrk("hello there!",
-                                      sizeof("hello there!") - 2, "!");
-  EXPECT_TRUE(p == nullptr);
-  p = absl::strings_internal::mempbrk("hello there", sizeof("hello there") - 1,
-                                      " t ");
-  EXPECT_TRUE(p && p[-1] == 'o' && p[1] == 't');
-
-  {
-    const char kHaystack[] = "0123456789";
-    EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 0, "", 0), kHaystack);
-    EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "012", 3),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "0xx", 1),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "789", 3),
-              kHaystack + 7);
-    EXPECT_EQ(absl::strings_internal::memmem(kHaystack, 10, "9xx", 1),
-              kHaystack + 9);
-    EXPECT_TRUE(absl::strings_internal::memmem(kHaystack, 10, "9xx", 3) ==
-                nullptr);
-    EXPECT_TRUE(absl::strings_internal::memmem(kHaystack, 10, "xxx", 1) ==
-                nullptr);
-  }
-  {
-    const char kHaystack[] = "aBcDeFgHiJ";
-    EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 0, "", 0),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "Abc", 3),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "Axx", 1),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "hIj", 3),
-              kHaystack + 7);
-    EXPECT_EQ(absl::strings_internal::memcasemem(kHaystack, 10, "jxx", 1),
-              kHaystack + 9);
-    EXPECT_TRUE(absl::strings_internal::memcasemem(kHaystack, 10, "jxx", 3) ==
-                nullptr);
-    EXPECT_TRUE(absl::strings_internal::memcasemem(kHaystack, 10, "xxx", 1) ==
-                nullptr);
-  }
-  {
-    const char kHaystack[] = "0123456789";
-    EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 0, "", 0), kHaystack);
-    EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "012", 3),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "0xx", 1),
-              kHaystack);
-    EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "789", 3),
-              kHaystack + 7);
-    EXPECT_EQ(absl::strings_internal::memmatch(kHaystack, 10, "9xx", 1),
-              kHaystack + 9);
-    EXPECT_TRUE(absl::strings_internal::memmatch(kHaystack, 10, "9xx", 3) ==
-                nullptr);
-    EXPECT_TRUE(absl::strings_internal::memmatch(kHaystack, 10, "xxx", 1) ==
-                nullptr);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/numbers_test_common.h b/third_party/abseil/absl/strings/internal/numbers_test_common.h
deleted file mode 100644
index eaa88a8..0000000
--- a/third_party/abseil/absl/strings/internal/numbers_test_common.h
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This file contains common things needed by numbers_test.cc,
-// numbers_legacy_test.cc and numbers_benchmark.cc.
-
-#ifndef ABSL_STRINGS_INTERNAL_NUMBERS_TEST_COMMON_H_
-#define ABSL_STRINGS_INTERNAL_NUMBERS_TEST_COMMON_H_
-
-#include <array>
-#include <cstdint>
-#include <limits>
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-template <typename IntType>
-inline bool Itoa(IntType value, int base, std::string* destination) {
-  destination->clear();
-  if (base <= 1 || base > 36) {
-    return false;
-  }
-
-  if (value == 0) {
-    destination->push_back('0');
-    return true;
-  }
-
-  bool negative = value < 0;
-  while (value != 0) {
-    const IntType next_value = value / base;
-    // Can't use std::abs here because of problems when IntType is unsigned.
-    int remainder =
-        static_cast<int>(value > next_value * base ? value - next_value * base
-                                                   : next_value * base - value);
-    char c = remainder < 10 ? '0' + remainder : 'A' + remainder - 10;
-    destination->insert(0, 1, c);
-    value = next_value;
-  }
-
-  if (negative) {
-    destination->insert(0, 1, '-');
-  }
-  return true;
-}
-
-struct uint32_test_case {
-  const char* str;
-  bool expect_ok;
-  int base;  // base to pass to the conversion function
-  uint32_t expected;
-};
-
-inline const std::array<uint32_test_case, 27>& strtouint32_test_cases() {
-  static const std::array<uint32_test_case, 27> test_cases{{
-      {"0xffffffff", true, 16, (std::numeric_limits<uint32_t>::max)()},
-      {"0x34234324", true, 16, 0x34234324},
-      {"34234324", true, 16, 0x34234324},
-      {"0", true, 16, 0},
-      {" \t\n 0xffffffff", true, 16, (std::numeric_limits<uint32_t>::max)()},
-      {" \f\v 46", true, 10, 46},  // must accept weird whitespace
-      {" \t\n 72717222", true, 8, 072717222},
-      {" \t\n 072717222", true, 8, 072717222},
-      {" \t\n 072717228", false, 8, 07271722},
-      {"0", true, 0, 0},
-
-      // Base-10 version.
-      {"34234324", true, 0, 34234324},
-      {"4294967295", true, 0, (std::numeric_limits<uint32_t>::max)()},
-      {"34234324 \n\t", true, 10, 34234324},
-
-      // Unusual base
-      {"0", true, 3, 0},
-      {"2", true, 3, 2},
-      {"11", true, 3, 4},
-
-      // Invalid uints.
-      {"", false, 0, 0},
-      {"  ", false, 0, 0},
-      {"abc", false, 0, 0},  // would be valid hex, but prefix is missing
-      {"34234324a", false, 0, 34234324},
-      {"34234.3", false, 0, 34234},
-      {"-1", false, 0, 0},
-      {"   -123", false, 0, 0},
-      {" \t\n -123", false, 0, 0},
-
-      // Out of bounds.
-      {"4294967296", false, 0, (std::numeric_limits<uint32_t>::max)()},
-      {"0x100000000", false, 0, (std::numeric_limits<uint32_t>::max)()},
-      {nullptr, false, 0, 0},
-  }};
-  return test_cases;
-}
-
-struct uint64_test_case {
-  const char* str;
-  bool expect_ok;
-  int base;
-  uint64_t expected;
-};
-
-inline const std::array<uint64_test_case, 34>& strtouint64_test_cases() {
-  static const std::array<uint64_test_case, 34> test_cases{{
-      {"0x3423432448783446", true, 16, int64_t{0x3423432448783446}},
-      {"3423432448783446", true, 16, int64_t{0x3423432448783446}},
-
-      {"0", true, 16, 0},
-      {"000", true, 0, 0},
-      {"0", true, 0, 0},
-      {" \t\n 0xffffffffffffffff", true, 16,
-       (std::numeric_limits<uint64_t>::max)()},
-
-      {"012345670123456701234", true, 8, int64_t{012345670123456701234}},
-      {"12345670123456701234", true, 8, int64_t{012345670123456701234}},
-
-      {"12845670123456701234", false, 8, 0},
-
-      // Base-10 version.
-      {"34234324487834466", true, 0, int64_t{34234324487834466}},
-
-      {" \t\n 18446744073709551615", true, 0,
-       (std::numeric_limits<uint64_t>::max)()},
-
-      {"34234324487834466 \n\t ", true, 0, int64_t{34234324487834466}},
-
-      {" \f\v 46", true, 10, 46},  // must accept weird whitespace
-
-      // Unusual base
-      {"0", true, 3, 0},
-      {"2", true, 3, 2},
-      {"11", true, 3, 4},
-
-      {"0", true, 0, 0},
-
-      // Invalid uints.
-      {"", false, 0, 0},
-      {"  ", false, 0, 0},
-      {"abc", false, 0, 0},
-      {"34234324487834466a", false, 0, 0},
-      {"34234487834466.3", false, 0, 0},
-      {"-1", false, 0, 0},
-      {"   -123", false, 0, 0},
-      {" \t\n -123", false, 0, 0},
-
-      // Out of bounds.
-      {"18446744073709551616", false, 10, 0},
-      {"18446744073709551616", false, 0, 0},
-      {"0x10000000000000000", false, 16,
-       (std::numeric_limits<uint64_t>::max)()},
-      {"0X10000000000000000", false, 16,
-       (std::numeric_limits<uint64_t>::max)()},  // 0X versus 0x.
-      {"0x10000000000000000", false, 0, (std::numeric_limits<uint64_t>::max)()},
-      {"0X10000000000000000", false, 0,
-       (std::numeric_limits<uint64_t>::max)()},  // 0X versus 0x.
-
-      {"0x1234", true, 16, 0x1234},
-
-      // Base-10 string version.
-      {"1234", true, 0, 1234},
-      {nullptr, false, 0, 0},
-  }};
-  return test_cases;
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_NUMBERS_TEST_COMMON_H_
diff --git a/third_party/abseil/absl/strings/internal/ostringstream.cc b/third_party/abseil/absl/strings/internal/ostringstream.cc
deleted file mode 100644
index 05324c7..0000000
--- a/third_party/abseil/absl/strings/internal/ostringstream.cc
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/ostringstream.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-OStringStream::Buf::int_type OStringStream::overflow(int c) {
-  assert(s_);
-  if (!Buf::traits_type::eq_int_type(c, Buf::traits_type::eof()))
-    s_->push_back(static_cast<char>(c));
-  return 1;
-}
-
-std::streamsize OStringStream::xsputn(const char* s, std::streamsize n) {
-  assert(s_);
-  s_->append(s, n);
-  return n;
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/ostringstream.h b/third_party/abseil/absl/strings/internal/ostringstream.h
deleted file mode 100644
index d25d604..0000000
--- a/third_party/abseil/absl/strings/internal/ostringstream.h
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_OSTRINGSTREAM_H_
-#define ABSL_STRINGS_INTERNAL_OSTRINGSTREAM_H_
-
-#include <cassert>
-#include <ostream>
-#include <streambuf>
-#include <string>
-
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// The same as std::ostringstream but appends to a user-specified std::string,
-// and is faster. It is ~70% faster to create, ~50% faster to write to, and
-// completely free to extract the result std::string.
-//
-//   std::string s;
-//   OStringStream strm(&s);
-//   strm << 42 << ' ' << 3.14;  // appends to `s`
-//
-// The stream object doesn't have to be named. Starting from C++11 operator<<
-// works with rvalues of std::ostream.
-//
-//   std::string s;
-//   OStringStream(&s) << 42 << ' ' << 3.14;  // appends to `s`
-//
-// OStringStream is faster to create than std::ostringstream but it's still
-// relatively slow. Avoid creating multiple streams where a single stream will
-// do.
-//
-// Creates unnecessary instances of OStringStream: slow.
-//
-//   std::string s;
-//   OStringStream(&s) << 42;
-//   OStringStream(&s) << ' ';
-//   OStringStream(&s) << 3.14;
-//
-// Creates a single instance of OStringStream and reuses it: fast.
-//
-//   std::string s;
-//   OStringStream strm(&s);
-//   strm << 42;
-//   strm << ' ';
-//   strm << 3.14;
-//
-// Note: flush() has no effect. No reason to call it.
-class OStringStream : private std::basic_streambuf<char>, public std::ostream {
- public:
-  // The argument can be null, in which case you'll need to call str(p) with a
-  // non-null argument before you can write to the stream.
-  //
-  // The destructor of OStringStream doesn't use the std::string. It's OK to
-  // destroy the std::string before the stream.
-  explicit OStringStream(std::string* s) : std::ostream(this), s_(s) {}
-
-  std::string* str() { return s_; }
-  const std::string* str() const { return s_; }
-  void str(std::string* s) { s_ = s; }
-
- private:
-  using Buf = std::basic_streambuf<char>;
-
-  Buf::int_type overflow(int c) override;
-  std::streamsize xsputn(const char* s, std::streamsize n) override;
-
-  std::string* s_;
-};
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_OSTRINGSTREAM_H_
diff --git a/third_party/abseil/absl/strings/internal/ostringstream_benchmark.cc b/third_party/abseil/absl/strings/internal/ostringstream_benchmark.cc
deleted file mode 100644
index 5979f18..0000000
--- a/third_party/abseil/absl/strings/internal/ostringstream_benchmark.cc
+++ /dev/null
@@ -1,106 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/ostringstream.h"
-
-#include <sstream>
-#include <string>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-enum StringType {
-  kNone,
-  kStdString,
-};
-
-// Benchmarks for std::ostringstream.
-template <StringType kOutput>
-void BM_StdStream(benchmark::State& state) {
-  const int num_writes = state.range(0);
-  const int bytes_per_write = state.range(1);
-  const std::string payload(bytes_per_write, 'x');
-  for (auto _ : state) {
-    std::ostringstream strm;
-    benchmark::DoNotOptimize(strm);
-    for (int i = 0; i != num_writes; ++i) {
-      strm << payload;
-    }
-    switch (kOutput) {
-      case kNone: {
-        break;
-      }
-      case kStdString: {
-        std::string s = strm.str();
-        benchmark::DoNotOptimize(s);
-        break;
-      }
-    }
-  }
-}
-
-// Create the stream, optionally write to it, then destroy it.
-BENCHMARK_TEMPLATE(BM_StdStream, kNone)
-    ->ArgPair(0, 0)
-    ->ArgPair(1, 16)   // 16 bytes is small enough for SSO
-    ->ArgPair(1, 256)  // 256 bytes requires heap allocation
-    ->ArgPair(1024, 256);
-// Create the stream, write to it, get std::string out, then destroy.
-BENCHMARK_TEMPLATE(BM_StdStream, kStdString)
-    ->ArgPair(1, 16)   // 16 bytes is small enough for SSO
-    ->ArgPair(1, 256)  // 256 bytes requires heap allocation
-    ->ArgPair(1024, 256);
-
-// Benchmarks for OStringStream.
-template <StringType kOutput>
-void BM_CustomStream(benchmark::State& state) {
-  const int num_writes = state.range(0);
-  const int bytes_per_write = state.range(1);
-  const std::string payload(bytes_per_write, 'x');
-  for (auto _ : state) {
-    std::string out;
-    absl::strings_internal::OStringStream strm(&out);
-    benchmark::DoNotOptimize(strm);
-    for (int i = 0; i != num_writes; ++i) {
-      strm << payload;
-    }
-    switch (kOutput) {
-      case kNone: {
-        break;
-      }
-      case kStdString: {
-        std::string s = out;
-        benchmark::DoNotOptimize(s);
-        break;
-      }
-    }
-  }
-}
-
-// Create the stream, optionally write to it, then destroy it.
-BENCHMARK_TEMPLATE(BM_CustomStream, kNone)
-    ->ArgPair(0, 0)
-    ->ArgPair(1, 16)   // 16 bytes is small enough for SSO
-    ->ArgPair(1, 256)  // 256 bytes requires heap allocation
-    ->ArgPair(1024, 256);
-// Create the stream, write to it, get std::string out, then destroy.
-// It's not useful in practice to extract std::string from OStringStream; we
-// measure it for completeness.
-BENCHMARK_TEMPLATE(BM_CustomStream, kStdString)
-    ->ArgPair(1, 16)   // 16 bytes is small enough for SSO
-    ->ArgPair(1, 256)  // 256 bytes requires heap allocation
-    ->ArgPair(1024, 256);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/ostringstream_test.cc b/third_party/abseil/absl/strings/internal/ostringstream_test.cc
deleted file mode 100644
index 2879e50..0000000
--- a/third_party/abseil/absl/strings/internal/ostringstream_test.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/ostringstream.h"
-
-#include <memory>
-#include <ostream>
-#include <string>
-#include <type_traits>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(OStringStream, IsOStream) {
-  static_assert(
-      std::is_base_of<std::ostream, absl::strings_internal::OStringStream>(),
-      "");
-}
-
-TEST(OStringStream, ConstructDestroy) {
-  {
-    absl::strings_internal::OStringStream strm(nullptr);
-    EXPECT_EQ(nullptr, strm.str());
-  }
-  {
-    std::string s = "abc";
-    {
-      absl::strings_internal::OStringStream strm(&s);
-      EXPECT_EQ(&s, strm.str());
-    }
-    EXPECT_EQ("abc", s);
-  }
-  {
-    std::unique_ptr<std::string> s(new std::string);
-    absl::strings_internal::OStringStream strm(s.get());
-    s.reset();
-  }
-}
-
-TEST(OStringStream, Str) {
-  std::string s1;
-  absl::strings_internal::OStringStream strm(&s1);
-  const absl::strings_internal::OStringStream& c_strm(strm);
-
-  static_assert(std::is_same<decltype(strm.str()), std::string*>(), "");
-  static_assert(std::is_same<decltype(c_strm.str()), const std::string*>(), "");
-
-  EXPECT_EQ(&s1, strm.str());
-  EXPECT_EQ(&s1, c_strm.str());
-
-  strm.str(&s1);
-  EXPECT_EQ(&s1, strm.str());
-  EXPECT_EQ(&s1, c_strm.str());
-
-  std::string s2;
-  strm.str(&s2);
-  EXPECT_EQ(&s2, strm.str());
-  EXPECT_EQ(&s2, c_strm.str());
-
-  strm.str(nullptr);
-  EXPECT_EQ(nullptr, strm.str());
-  EXPECT_EQ(nullptr, c_strm.str());
-}
-
-TEST(OStreamStream, WriteToLValue) {
-  std::string s = "abc";
-  {
-    absl::strings_internal::OStringStream strm(&s);
-    EXPECT_EQ("abc", s);
-    strm << "";
-    EXPECT_EQ("abc", s);
-    strm << 42;
-    EXPECT_EQ("abc42", s);
-    strm << 'x' << 'y';
-    EXPECT_EQ("abc42xy", s);
-  }
-  EXPECT_EQ("abc42xy", s);
-}
-
-TEST(OStreamStream, WriteToRValue) {
-  std::string s = "abc";
-  absl::strings_internal::OStringStream(&s) << "";
-  EXPECT_EQ("abc", s);
-  absl::strings_internal::OStringStream(&s) << 42;
-  EXPECT_EQ("abc42", s);
-  absl::strings_internal::OStringStream(&s) << 'x' << 'y';
-  EXPECT_EQ("abc42xy", s);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/pow10_helper.cc b/third_party/abseil/absl/strings/internal/pow10_helper.cc
deleted file mode 100644
index 42e96c3..0000000
--- a/third_party/abseil/absl/strings/internal/pow10_helper.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/pow10_helper.h"
-
-#include <cmath>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-namespace {
-
-// The exact value of 1e23 falls precisely halfway between two representable
-// doubles. Furthermore, the rounding rules we prefer (break ties by rounding
-// to the nearest even) dictate in this case that the number should be rounded
-// down, but this is not completely specified for floating-point literals in
-// C++. (It just says to use the default rounding mode of the standard
-// library.) We ensure the result we want by using a number that has an
-// unambiguous correctly rounded answer.
-constexpr double k1e23 = 9999999999999999e7;
-
-constexpr double kPowersOfTen[] = {
-    0.0,    1e-323, 1e-322, 1e-321, 1e-320, 1e-319, 1e-318, 1e-317, 1e-316,
-    1e-315, 1e-314, 1e-313, 1e-312, 1e-311, 1e-310, 1e-309, 1e-308, 1e-307,
-    1e-306, 1e-305, 1e-304, 1e-303, 1e-302, 1e-301, 1e-300, 1e-299, 1e-298,
-    1e-297, 1e-296, 1e-295, 1e-294, 1e-293, 1e-292, 1e-291, 1e-290, 1e-289,
-    1e-288, 1e-287, 1e-286, 1e-285, 1e-284, 1e-283, 1e-282, 1e-281, 1e-280,
-    1e-279, 1e-278, 1e-277, 1e-276, 1e-275, 1e-274, 1e-273, 1e-272, 1e-271,
-    1e-270, 1e-269, 1e-268, 1e-267, 1e-266, 1e-265, 1e-264, 1e-263, 1e-262,
-    1e-261, 1e-260, 1e-259, 1e-258, 1e-257, 1e-256, 1e-255, 1e-254, 1e-253,
-    1e-252, 1e-251, 1e-250, 1e-249, 1e-248, 1e-247, 1e-246, 1e-245, 1e-244,
-    1e-243, 1e-242, 1e-241, 1e-240, 1e-239, 1e-238, 1e-237, 1e-236, 1e-235,
-    1e-234, 1e-233, 1e-232, 1e-231, 1e-230, 1e-229, 1e-228, 1e-227, 1e-226,
-    1e-225, 1e-224, 1e-223, 1e-222, 1e-221, 1e-220, 1e-219, 1e-218, 1e-217,
-    1e-216, 1e-215, 1e-214, 1e-213, 1e-212, 1e-211, 1e-210, 1e-209, 1e-208,
-    1e-207, 1e-206, 1e-205, 1e-204, 1e-203, 1e-202, 1e-201, 1e-200, 1e-199,
-    1e-198, 1e-197, 1e-196, 1e-195, 1e-194, 1e-193, 1e-192, 1e-191, 1e-190,
-    1e-189, 1e-188, 1e-187, 1e-186, 1e-185, 1e-184, 1e-183, 1e-182, 1e-181,
-    1e-180, 1e-179, 1e-178, 1e-177, 1e-176, 1e-175, 1e-174, 1e-173, 1e-172,
-    1e-171, 1e-170, 1e-169, 1e-168, 1e-167, 1e-166, 1e-165, 1e-164, 1e-163,
-    1e-162, 1e-161, 1e-160, 1e-159, 1e-158, 1e-157, 1e-156, 1e-155, 1e-154,
-    1e-153, 1e-152, 1e-151, 1e-150, 1e-149, 1e-148, 1e-147, 1e-146, 1e-145,
-    1e-144, 1e-143, 1e-142, 1e-141, 1e-140, 1e-139, 1e-138, 1e-137, 1e-136,
-    1e-135, 1e-134, 1e-133, 1e-132, 1e-131, 1e-130, 1e-129, 1e-128, 1e-127,
-    1e-126, 1e-125, 1e-124, 1e-123, 1e-122, 1e-121, 1e-120, 1e-119, 1e-118,
-    1e-117, 1e-116, 1e-115, 1e-114, 1e-113, 1e-112, 1e-111, 1e-110, 1e-109,
-    1e-108, 1e-107, 1e-106, 1e-105, 1e-104, 1e-103, 1e-102, 1e-101, 1e-100,
-    1e-99,  1e-98,  1e-97,  1e-96,  1e-95,  1e-94,  1e-93,  1e-92,  1e-91,
-    1e-90,  1e-89,  1e-88,  1e-87,  1e-86,  1e-85,  1e-84,  1e-83,  1e-82,
-    1e-81,  1e-80,  1e-79,  1e-78,  1e-77,  1e-76,  1e-75,  1e-74,  1e-73,
-    1e-72,  1e-71,  1e-70,  1e-69,  1e-68,  1e-67,  1e-66,  1e-65,  1e-64,
-    1e-63,  1e-62,  1e-61,  1e-60,  1e-59,  1e-58,  1e-57,  1e-56,  1e-55,
-    1e-54,  1e-53,  1e-52,  1e-51,  1e-50,  1e-49,  1e-48,  1e-47,  1e-46,
-    1e-45,  1e-44,  1e-43,  1e-42,  1e-41,  1e-40,  1e-39,  1e-38,  1e-37,
-    1e-36,  1e-35,  1e-34,  1e-33,  1e-32,  1e-31,  1e-30,  1e-29,  1e-28,
-    1e-27,  1e-26,  1e-25,  1e-24,  1e-23,  1e-22,  1e-21,  1e-20,  1e-19,
-    1e-18,  1e-17,  1e-16,  1e-15,  1e-14,  1e-13,  1e-12,  1e-11,  1e-10,
-    1e-9,   1e-8,   1e-7,   1e-6,   1e-5,   1e-4,   1e-3,   1e-2,   1e-1,
-    1e+0,   1e+1,   1e+2,   1e+3,   1e+4,   1e+5,   1e+6,   1e+7,   1e+8,
-    1e+9,   1e+10,  1e+11,  1e+12,  1e+13,  1e+14,  1e+15,  1e+16,  1e+17,
-    1e+18,  1e+19,  1e+20,  1e+21,  1e+22,  k1e23,  1e+24,  1e+25,  1e+26,
-    1e+27,  1e+28,  1e+29,  1e+30,  1e+31,  1e+32,  1e+33,  1e+34,  1e+35,
-    1e+36,  1e+37,  1e+38,  1e+39,  1e+40,  1e+41,  1e+42,  1e+43,  1e+44,
-    1e+45,  1e+46,  1e+47,  1e+48,  1e+49,  1e+50,  1e+51,  1e+52,  1e+53,
-    1e+54,  1e+55,  1e+56,  1e+57,  1e+58,  1e+59,  1e+60,  1e+61,  1e+62,
-    1e+63,  1e+64,  1e+65,  1e+66,  1e+67,  1e+68,  1e+69,  1e+70,  1e+71,
-    1e+72,  1e+73,  1e+74,  1e+75,  1e+76,  1e+77,  1e+78,  1e+79,  1e+80,
-    1e+81,  1e+82,  1e+83,  1e+84,  1e+85,  1e+86,  1e+87,  1e+88,  1e+89,
-    1e+90,  1e+91,  1e+92,  1e+93,  1e+94,  1e+95,  1e+96,  1e+97,  1e+98,
-    1e+99,  1e+100, 1e+101, 1e+102, 1e+103, 1e+104, 1e+105, 1e+106, 1e+107,
-    1e+108, 1e+109, 1e+110, 1e+111, 1e+112, 1e+113, 1e+114, 1e+115, 1e+116,
-    1e+117, 1e+118, 1e+119, 1e+120, 1e+121, 1e+122, 1e+123, 1e+124, 1e+125,
-    1e+126, 1e+127, 1e+128, 1e+129, 1e+130, 1e+131, 1e+132, 1e+133, 1e+134,
-    1e+135, 1e+136, 1e+137, 1e+138, 1e+139, 1e+140, 1e+141, 1e+142, 1e+143,
-    1e+144, 1e+145, 1e+146, 1e+147, 1e+148, 1e+149, 1e+150, 1e+151, 1e+152,
-    1e+153, 1e+154, 1e+155, 1e+156, 1e+157, 1e+158, 1e+159, 1e+160, 1e+161,
-    1e+162, 1e+163, 1e+164, 1e+165, 1e+166, 1e+167, 1e+168, 1e+169, 1e+170,
-    1e+171, 1e+172, 1e+173, 1e+174, 1e+175, 1e+176, 1e+177, 1e+178, 1e+179,
-    1e+180, 1e+181, 1e+182, 1e+183, 1e+184, 1e+185, 1e+186, 1e+187, 1e+188,
-    1e+189, 1e+190, 1e+191, 1e+192, 1e+193, 1e+194, 1e+195, 1e+196, 1e+197,
-    1e+198, 1e+199, 1e+200, 1e+201, 1e+202, 1e+203, 1e+204, 1e+205, 1e+206,
-    1e+207, 1e+208, 1e+209, 1e+210, 1e+211, 1e+212, 1e+213, 1e+214, 1e+215,
-    1e+216, 1e+217, 1e+218, 1e+219, 1e+220, 1e+221, 1e+222, 1e+223, 1e+224,
-    1e+225, 1e+226, 1e+227, 1e+228, 1e+229, 1e+230, 1e+231, 1e+232, 1e+233,
-    1e+234, 1e+235, 1e+236, 1e+237, 1e+238, 1e+239, 1e+240, 1e+241, 1e+242,
-    1e+243, 1e+244, 1e+245, 1e+246, 1e+247, 1e+248, 1e+249, 1e+250, 1e+251,
-    1e+252, 1e+253, 1e+254, 1e+255, 1e+256, 1e+257, 1e+258, 1e+259, 1e+260,
-    1e+261, 1e+262, 1e+263, 1e+264, 1e+265, 1e+266, 1e+267, 1e+268, 1e+269,
-    1e+270, 1e+271, 1e+272, 1e+273, 1e+274, 1e+275, 1e+276, 1e+277, 1e+278,
-    1e+279, 1e+280, 1e+281, 1e+282, 1e+283, 1e+284, 1e+285, 1e+286, 1e+287,
-    1e+288, 1e+289, 1e+290, 1e+291, 1e+292, 1e+293, 1e+294, 1e+295, 1e+296,
-    1e+297, 1e+298, 1e+299, 1e+300, 1e+301, 1e+302, 1e+303, 1e+304, 1e+305,
-    1e+306, 1e+307, 1e+308,
-};
-
-}  // namespace
-
-double Pow10(int exp) {
-  if (exp < -324) {
-    return 0.0;
-  } else if (exp > 308) {
-    return INFINITY;
-  } else {
-    return kPowersOfTen[exp + 324];
-  }
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/pow10_helper.h b/third_party/abseil/absl/strings/internal/pow10_helper.h
deleted file mode 100644
index c37c2c3..0000000
--- a/third_party/abseil/absl/strings/internal/pow10_helper.h
+++ /dev/null
@@ -1,40 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This test helper library contains a table of powers of 10, to guarantee
-// precise values are computed across the full range of doubles. We can't rely
-// on the pow() function, because not all standard libraries ship a version
-// that is precise.
-#ifndef ABSL_STRINGS_INTERNAL_POW10_HELPER_H_
-#define ABSL_STRINGS_INTERNAL_POW10_HELPER_H_
-
-#include <vector>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// Computes the precise value of 10^exp. (I.e. the nearest representable
-// double to the exact value, rounding to nearest-even in the (single) case of
-// being exactly halfway between.)
-double Pow10(int exp);
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_POW10_HELPER_H_
diff --git a/third_party/abseil/absl/strings/internal/pow10_helper_test.cc b/third_party/abseil/absl/strings/internal/pow10_helper_test.cc
deleted file mode 100644
index a4ff76d..0000000
--- a/third_party/abseil/absl/strings/internal/pow10_helper_test.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/pow10_helper.h"
-
-#include <cmath>
-
-#include "gtest/gtest.h"
-#include "absl/strings/str_format.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-namespace {
-
-struct TestCase {
-  int power;           // Testing Pow10(power)
-  uint64_t significand;  // Raw bits of the expected value
-  int radix;           // significand is adjusted by 2^radix
-};
-
-TEST(Pow10HelperTest, Works) {
-  // The logic in pow10_helper.cc is so simple that theoretically we don't even
-  // need a test. However, we're paranoid and believe that there may be
-  // compilers that don't round floating-point literals correctly, even though
-  // it is specified by the standard. We check various edge cases, just to be
-  // sure.
-  constexpr TestCase kTestCases[] = {
-      // Subnormals
-      {-323, 0x2, -1074},
-      {-322, 0x14, -1074},
-      {-321, 0xca, -1074},
-      {-320, 0x7e8, -1074},
-      {-319, 0x4f10, -1074},
-      {-318, 0x316a2, -1074},
-      {-317, 0x1ee257, -1074},
-      {-316, 0x134d761, -1074},
-      {-315, 0xc1069cd, -1074},
-      {-314, 0x78a42205, -1074},
-      {-313, 0x4b6695433, -1074},
-      {-312, 0x2f201d49fb, -1074},
-      {-311, 0x1d74124e3d1, -1074},
-      {-310, 0x12688b70e62b, -1074},
-      {-309, 0xb8157268fdaf, -1074},
-      {-308, 0x730d67819e8d2, -1074},
-      // Values that are very close to rounding the other way.
-      // Comment shows difference of significand from the true value.
-      {-307, 0x11fa182c40c60d, -1072},  // -.4588
-      {-290, 0x18f2b061aea072, -1016},  //  .4854
-      {-276, 0x11BA03F5B21000, -969},   //  .4709
-      {-259, 0x1899C2F6732210, -913},   //  .4830
-      {-252, 0x1D53844EE47DD1, -890},   // -.4743
-      {-227, 0x1E5297287C2F45, -807},   // -.4708
-      {-198, 0x1322E220A5B17E, -710},   // -.4714
-      {-195, 0x12B010D3E1CF56, -700},   //  .4928
-      {-192, 0x123FF06EEA847A, -690},   //  .4968
-      {-163, 0x1708D0F84D3DE7, -594},   // -.4977
-      {-145, 0x13FAAC3E3FA1F3, -534},   // -.4785
-      {-111, 0x133D4032C2C7F5, -421},   //  .4774
-      {-106, 0x1D5B561574765B, -405},   // -.4869
-      {-104, 0x16EF5B40C2FC77, -398},   // -.4741
-      {-88, 0x197683DF2F268D, -345},    // -.4738
-      {-86, 0x13E497065CD61F, -338},    //  .4736
-      {-76, 0x17288E1271F513, -305},    // -.4761
-      {-63, 0x1A53FC9631D10D, -262},    //  .4929
-      {-30, 0x14484BFEEBC2A0, -152},    //  .4758
-      {-21, 0x12E3B40A0E9B4F, -122},    // -.4916
-      {-5, 0x14F8B588E368F1, -69},      //  .4829
-      {23, 0x152D02C7E14AF6, 24},       // -.5000 (exactly, round-to-even)
-      {29, 0x1431E0FAE6D721, 44},       // -.4870
-      {34, 0x1ED09BEAD87C03, 60},       // -.4721
-      {70, 0x172EBAD6DDC73D, 180},      //  .4733
-      {105, 0x1BE7ABD3781ECA, 296},     // -.4850
-      {126, 0x17A2ECC414A03F, 366},     // -.4999
-      {130, 0x1CDA62055B2D9E, 379},     //  .4855
-      {165, 0x115D847AD00087, 496},     // -.4913
-      {172, 0x14B378469B6732, 519},     //  .4818
-      {187, 0x1262DFEEBBB0F9, 569},     // -.4805
-      {210, 0x18557F31326BBB, 645},     // -.4992
-      {212, 0x1302CB5E6F642A, 652},     // -.4838
-      {215, 0x1290BA9A38C7D1, 662},     // -.4881
-      {236, 0x1F736F9B3494E9, 731},     //  .4707
-      {244, 0x176EC98994F489, 758},     //  .4924
-      {250, 0x1658E3AB795204, 778},     // -.4963
-      {252, 0x117571DDF6C814, 785},     //  .4873
-      {254, 0x1B4781EAD1989E, 791},     // -.4887
-      {260, 0x1A03FDE214CAF1, 811},     //  .4784
-      {284, 0x1585041B2C477F, 891},     //  .4798
-      {304, 0x1D2A1BE4048F90, 957},     // -.4987
-      // Out-of-range values
-      {-324, 0x0, 0},
-      {-325, 0x0, 0},
-      {-326, 0x0, 0},
-      {309, 1, 2000},
-      {310, 1, 2000},
-      {311, 1, 2000},
-  };
-  for (const TestCase& test_case : kTestCases) {
-    EXPECT_EQ(Pow10(test_case.power),
-              std::ldexp(test_case.significand, test_case.radix))
-        << absl::StrFormat("Failure for Pow10(%d): %a vs %a", test_case.power,
-                           Pow10(test_case.power),
-                           std::ldexp(test_case.significand, test_case.radix));
-  }
-}
-
-}  // namespace
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/resize_uninitialized.h b/third_party/abseil/absl/strings/internal/resize_uninitialized.h
deleted file mode 100644
index e42628e..0000000
--- a/third_party/abseil/absl/strings/internal/resize_uninitialized.h
+++ /dev/null
@@ -1,73 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_STRINGS_INTERNAL_RESIZE_UNINITIALIZED_H_
-#define ABSL_STRINGS_INTERNAL_RESIZE_UNINITIALIZED_H_
-
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/port.h"
-#include "absl/meta/type_traits.h"  //  for void_t
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// Is a subclass of true_type or false_type, depending on whether or not
-// T has a __resize_default_init member.
-template <typename string_type, typename = void>
-struct ResizeUninitializedTraits {
-  using HasMember = std::false_type;
-  static void Resize(string_type* s, size_t new_size) { s->resize(new_size); }
-};
-
-// __resize_default_init is provided by libc++ >= 8.0
-template <typename string_type>
-struct ResizeUninitializedTraits<
-    string_type, absl::void_t<decltype(std::declval<string_type&>()
-                                           .__resize_default_init(237))> > {
-  using HasMember = std::true_type;
-  static void Resize(string_type* s, size_t new_size) {
-    s->__resize_default_init(new_size);
-  }
-};
-
-// Returns true if the std::string implementation supports a resize where
-// the new characters added to the std::string are left untouched.
-//
-// (A better name might be "STLStringSupportsUninitializedResize", alluding to
-// the previous function.)
-template <typename string_type>
-inline constexpr bool STLStringSupportsNontrashingResize(string_type*) {
-  return ResizeUninitializedTraits<string_type>::HasMember::value;
-}
-
-// Like str->resize(new_size), except any new characters added to "*str" as a
-// result of resizing may be left uninitialized, rather than being filled with
-// '0' bytes. Typically used when code is then going to overwrite the backing
-// store of the std::string with known data.
-template <typename string_type, typename = void>
-inline void STLStringResizeUninitialized(string_type* s, size_t new_size) {
-  ResizeUninitializedTraits<string_type>::Resize(s, new_size);
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_RESIZE_UNINITIALIZED_H_
diff --git a/third_party/abseil/absl/strings/internal/resize_uninitialized_test.cc b/third_party/abseil/absl/strings/internal/resize_uninitialized_test.cc
deleted file mode 100644
index 0f8b3c2..0000000
--- a/third_party/abseil/absl/strings/internal/resize_uninitialized_test.cc
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/resize_uninitialized.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-int resize_call_count = 0;
-
-// A mock string class whose only purpose is to track how many times its
-// resize() method has been called.
-struct resizable_string {
-  size_t size() const { return 0; }
-  char& operator[](size_t) {
-    static char c = '\0';
-    return c;
-  }
-  void resize(size_t) { resize_call_count += 1; }
-};
-
-int resize_default_init_call_count = 0;
-
-// A mock string class whose only purpose is to track how many times its
-// resize() and __resize_default_init() methods have been called.
-struct resize_default_init_string {
-  size_t size() const { return 0; }
-  char& operator[](size_t) {
-    static char c = '\0';
-    return c;
-  }
-  void resize(size_t) { resize_call_count += 1; }
-  void __resize_default_init(size_t) { resize_default_init_call_count += 1; }
-};
-
-TEST(ResizeUninit, WithAndWithout) {
-  resize_call_count = 0;
-  resize_default_init_call_count = 0;
-  {
-    resizable_string rs;
-
-    EXPECT_EQ(resize_call_count, 0);
-    EXPECT_EQ(resize_default_init_call_count, 0);
-    EXPECT_FALSE(
-        absl::strings_internal::STLStringSupportsNontrashingResize(&rs));
-    EXPECT_EQ(resize_call_count, 0);
-    EXPECT_EQ(resize_default_init_call_count, 0);
-    absl::strings_internal::STLStringResizeUninitialized(&rs, 237);
-    EXPECT_EQ(resize_call_count, 1);
-    EXPECT_EQ(resize_default_init_call_count, 0);
-  }
-
-  resize_call_count = 0;
-  resize_default_init_call_count = 0;
-  {
-    resize_default_init_string rus;
-
-    EXPECT_EQ(resize_call_count, 0);
-    EXPECT_EQ(resize_default_init_call_count, 0);
-    EXPECT_TRUE(
-        absl::strings_internal::STLStringSupportsNontrashingResize(&rus));
-    EXPECT_EQ(resize_call_count, 0);
-    EXPECT_EQ(resize_default_init_call_count, 0);
-    absl::strings_internal::STLStringResizeUninitialized(&rus, 237);
-    EXPECT_EQ(resize_call_count, 0);
-    EXPECT_EQ(resize_default_init_call_count, 1);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/stl_type_traits.h b/third_party/abseil/absl/strings/internal/stl_type_traits.h
deleted file mode 100644
index 6035ca4..0000000
--- a/third_party/abseil/absl/strings/internal/stl_type_traits.h
+++ /dev/null
@@ -1,248 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// Thie file provides the IsStrictlyBaseOfAndConvertibleToSTLContainer type
-// trait metafunction to assist in working with the _GLIBCXX_DEBUG debug
-// wrappers of STL containers.
-//
-// DO NOT INCLUDE THIS FILE DIRECTLY. Use this file by including
-// absl/strings/str_split.h.
-//
-// IWYU pragma: private, include "absl/strings/str_split.h"
-
-#ifndef ABSL_STRINGS_INTERNAL_STL_TYPE_TRAITS_H_
-#define ABSL_STRINGS_INTERNAL_STL_TYPE_TRAITS_H_
-
-#include <array>
-#include <bitset>
-#include <deque>
-#include <forward_list>
-#include <list>
-#include <map>
-#include <set>
-#include <type_traits>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-template <typename C, template <typename...> class T>
-struct IsSpecializationImpl : std::false_type {};
-template <template <typename...> class T, typename... Args>
-struct IsSpecializationImpl<T<Args...>, T> : std::true_type {};
-template <typename C, template <typename...> class T>
-using IsSpecialization = IsSpecializationImpl<absl::decay_t<C>, T>;
-
-template <typename C>
-struct IsArrayImpl : std::false_type {};
-template <template <typename, size_t> class A, typename T, size_t N>
-struct IsArrayImpl<A<T, N>> : std::is_same<A<T, N>, std::array<T, N>> {};
-template <typename C>
-using IsArray = IsArrayImpl<absl::decay_t<C>>;
-
-template <typename C>
-struct IsBitsetImpl : std::false_type {};
-template <template <size_t> class B, size_t N>
-struct IsBitsetImpl<B<N>> : std::is_same<B<N>, std::bitset<N>> {};
-template <typename C>
-using IsBitset = IsBitsetImpl<absl::decay_t<C>>;
-
-template <typename C>
-struct IsSTLContainer
-    : absl::disjunction<
-          IsArray<C>, IsBitset<C>, IsSpecialization<C, std::deque>,
-          IsSpecialization<C, std::forward_list>,
-          IsSpecialization<C, std::list>, IsSpecialization<C, std::map>,
-          IsSpecialization<C, std::multimap>, IsSpecialization<C, std::set>,
-          IsSpecialization<C, std::multiset>,
-          IsSpecialization<C, std::unordered_map>,
-          IsSpecialization<C, std::unordered_multimap>,
-          IsSpecialization<C, std::unordered_set>,
-          IsSpecialization<C, std::unordered_multiset>,
-          IsSpecialization<C, std::vector>> {};
-
-template <typename C, template <typename...> class T, typename = void>
-struct IsBaseOfSpecializationImpl : std::false_type {};
-// IsBaseOfSpecializationImpl needs multiple partial specializations to SFINAE
-// on the existence of container dependent types and plug them into the STL
-// template.
-template <typename C, template <typename, typename> class T>
-struct IsBaseOfSpecializationImpl<
-    C, T, absl::void_t<typename C::value_type, typename C::allocator_type>>
-    : std::is_base_of<C,
-                      T<typename C::value_type, typename C::allocator_type>> {};
-template <typename C, template <typename, typename, typename> class T>
-struct IsBaseOfSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::key_compare,
-                 typename C::allocator_type>>
-    : std::is_base_of<C, T<typename C::key_type, typename C::key_compare,
-                           typename C::allocator_type>> {};
-template <typename C, template <typename, typename, typename, typename> class T>
-struct IsBaseOfSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::mapped_type,
-                 typename C::key_compare, typename C::allocator_type>>
-    : std::is_base_of<C,
-                      T<typename C::key_type, typename C::mapped_type,
-                        typename C::key_compare, typename C::allocator_type>> {
-};
-template <typename C, template <typename, typename, typename, typename> class T>
-struct IsBaseOfSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::hasher,
-                 typename C::key_equal, typename C::allocator_type>>
-    : std::is_base_of<C, T<typename C::key_type, typename C::hasher,
-                           typename C::key_equal, typename C::allocator_type>> {
-};
-template <typename C,
-          template <typename, typename, typename, typename, typename> class T>
-struct IsBaseOfSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::mapped_type,
-                 typename C::hasher, typename C::key_equal,
-                 typename C::allocator_type>>
-    : std::is_base_of<C, T<typename C::key_type, typename C::mapped_type,
-                           typename C::hasher, typename C::key_equal,
-                           typename C::allocator_type>> {};
-template <typename C, template <typename...> class T>
-using IsBaseOfSpecialization = IsBaseOfSpecializationImpl<absl::decay_t<C>, T>;
-
-template <typename C>
-struct IsBaseOfArrayImpl : std::false_type {};
-template <template <typename, size_t> class A, typename T, size_t N>
-struct IsBaseOfArrayImpl<A<T, N>> : std::is_base_of<A<T, N>, std::array<T, N>> {
-};
-template <typename C>
-using IsBaseOfArray = IsBaseOfArrayImpl<absl::decay_t<C>>;
-
-template <typename C>
-struct IsBaseOfBitsetImpl : std::false_type {};
-template <template <size_t> class B, size_t N>
-struct IsBaseOfBitsetImpl<B<N>> : std::is_base_of<B<N>, std::bitset<N>> {};
-template <typename C>
-using IsBaseOfBitset = IsBaseOfBitsetImpl<absl::decay_t<C>>;
-
-template <typename C>
-struct IsBaseOfSTLContainer
-    : absl::disjunction<IsBaseOfArray<C>, IsBaseOfBitset<C>,
-                        IsBaseOfSpecialization<C, std::deque>,
-                        IsBaseOfSpecialization<C, std::forward_list>,
-                        IsBaseOfSpecialization<C, std::list>,
-                        IsBaseOfSpecialization<C, std::map>,
-                        IsBaseOfSpecialization<C, std::multimap>,
-                        IsBaseOfSpecialization<C, std::set>,
-                        IsBaseOfSpecialization<C, std::multiset>,
-                        IsBaseOfSpecialization<C, std::unordered_map>,
-                        IsBaseOfSpecialization<C, std::unordered_multimap>,
-                        IsBaseOfSpecialization<C, std::unordered_set>,
-                        IsBaseOfSpecialization<C, std::unordered_multiset>,
-                        IsBaseOfSpecialization<C, std::vector>> {};
-
-template <typename C, template <typename...> class T, typename = void>
-struct IsConvertibleToSpecializationImpl : std::false_type {};
-// IsConvertibleToSpecializationImpl needs multiple partial specializations to
-// SFINAE on the existence of container dependent types and plug them into the
-// STL template.
-template <typename C, template <typename, typename> class T>
-struct IsConvertibleToSpecializationImpl<
-    C, T, absl::void_t<typename C::value_type, typename C::allocator_type>>
-    : std::is_convertible<
-          C, T<typename C::value_type, typename C::allocator_type>> {};
-template <typename C, template <typename, typename, typename> class T>
-struct IsConvertibleToSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::key_compare,
-                 typename C::allocator_type>>
-    : std::is_convertible<C, T<typename C::key_type, typename C::key_compare,
-                               typename C::allocator_type>> {};
-template <typename C, template <typename, typename, typename, typename> class T>
-struct IsConvertibleToSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::mapped_type,
-                 typename C::key_compare, typename C::allocator_type>>
-    : std::is_convertible<
-          C, T<typename C::key_type, typename C::mapped_type,
-               typename C::key_compare, typename C::allocator_type>> {};
-template <typename C, template <typename, typename, typename, typename> class T>
-struct IsConvertibleToSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::hasher,
-                 typename C::key_equal, typename C::allocator_type>>
-    : std::is_convertible<
-          C, T<typename C::key_type, typename C::hasher, typename C::key_equal,
-               typename C::allocator_type>> {};
-template <typename C,
-          template <typename, typename, typename, typename, typename> class T>
-struct IsConvertibleToSpecializationImpl<
-    C, T,
-    absl::void_t<typename C::key_type, typename C::mapped_type,
-                 typename C::hasher, typename C::key_equal,
-                 typename C::allocator_type>>
-    : std::is_convertible<C, T<typename C::key_type, typename C::mapped_type,
-                               typename C::hasher, typename C::key_equal,
-                               typename C::allocator_type>> {};
-template <typename C, template <typename...> class T>
-using IsConvertibleToSpecialization =
-    IsConvertibleToSpecializationImpl<absl::decay_t<C>, T>;
-
-template <typename C>
-struct IsConvertibleToArrayImpl : std::false_type {};
-template <template <typename, size_t> class A, typename T, size_t N>
-struct IsConvertibleToArrayImpl<A<T, N>>
-    : std::is_convertible<A<T, N>, std::array<T, N>> {};
-template <typename C>
-using IsConvertibleToArray = IsConvertibleToArrayImpl<absl::decay_t<C>>;
-
-template <typename C>
-struct IsConvertibleToBitsetImpl : std::false_type {};
-template <template <size_t> class B, size_t N>
-struct IsConvertibleToBitsetImpl<B<N>>
-    : std::is_convertible<B<N>, std::bitset<N>> {};
-template <typename C>
-using IsConvertibleToBitset = IsConvertibleToBitsetImpl<absl::decay_t<C>>;
-
-template <typename C>
-struct IsConvertibleToSTLContainer
-    : absl::disjunction<
-          IsConvertibleToArray<C>, IsConvertibleToBitset<C>,
-          IsConvertibleToSpecialization<C, std::deque>,
-          IsConvertibleToSpecialization<C, std::forward_list>,
-          IsConvertibleToSpecialization<C, std::list>,
-          IsConvertibleToSpecialization<C, std::map>,
-          IsConvertibleToSpecialization<C, std::multimap>,
-          IsConvertibleToSpecialization<C, std::set>,
-          IsConvertibleToSpecialization<C, std::multiset>,
-          IsConvertibleToSpecialization<C, std::unordered_map>,
-          IsConvertibleToSpecialization<C, std::unordered_multimap>,
-          IsConvertibleToSpecialization<C, std::unordered_set>,
-          IsConvertibleToSpecialization<C, std::unordered_multiset>,
-          IsConvertibleToSpecialization<C, std::vector>> {};
-
-template <typename C>
-struct IsStrictlyBaseOfAndConvertibleToSTLContainer
-    : absl::conjunction<absl::negation<IsSTLContainer<C>>,
-                        IsBaseOfSTLContainer<C>,
-                        IsConvertibleToSTLContainer<C>> {};
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_STRINGS_INTERNAL_STL_TYPE_TRAITS_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/arg.cc b/third_party/abseil/absl/strings/internal/str_format/arg.cc
deleted file mode 100644
index e28a29b..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/arg.cc
+++ /dev/null
@@ -1,488 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//
-// POSIX spec:
-//   http://pubs.opengroup.org/onlinepubs/009695399/functions/fprintf.html
-//
-#include "absl/strings/internal/str_format/arg.h"
-
-#include <cassert>
-#include <cerrno>
-#include <cstdlib>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/port.h"
-#include "absl/strings/internal/str_format/float_conversion.h"
-#include "absl/strings/numbers.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-namespace {
-
-// Reduce *capacity by s.size(), clipped to a 0 minimum.
-void ReducePadding(string_view s, size_t *capacity) {
-  *capacity = Excess(s.size(), *capacity);
-}
-
-// Reduce *capacity by n, clipped to a 0 minimum.
-void ReducePadding(size_t n, size_t *capacity) {
-  *capacity = Excess(n, *capacity);
-}
-
-template <typename T>
-struct MakeUnsigned : std::make_unsigned<T> {};
-template <>
-struct MakeUnsigned<absl::int128> {
-  using type = absl::uint128;
-};
-template <>
-struct MakeUnsigned<absl::uint128> {
-  using type = absl::uint128;
-};
-
-template <typename T>
-struct IsSigned : std::is_signed<T> {};
-template <>
-struct IsSigned<absl::int128> : std::true_type {};
-template <>
-struct IsSigned<absl::uint128> : std::false_type {};
-
-// Integral digit printer.
-// Call one of the PrintAs* routines after construction once.
-// Use with_neg_and_zero/without_neg_or_zero/is_negative to access the results.
-class IntDigits {
- public:
-  // Print the unsigned integer as octal.
-  // Supports unsigned integral types and uint128.
-  template <typename T>
-  void PrintAsOct(T v) {
-    static_assert(!IsSigned<T>::value, "");
-    char *p = storage_ + sizeof(storage_);
-    do {
-      *--p = static_cast<char>('0' + (static_cast<size_t>(v) & 7));
-      v >>= 3;
-    } while (v);
-    start_ = p;
-    size_ = storage_ + sizeof(storage_) - p;
-  }
-
-  // Print the signed or unsigned integer as decimal.
-  // Supports all integral types.
-  template <typename T>
-  void PrintAsDec(T v) {
-    static_assert(std::is_integral<T>::value, "");
-    start_ = storage_;
-    size_ = numbers_internal::FastIntToBuffer(v, storage_) - storage_;
-  }
-
-  void PrintAsDec(int128 v) {
-    auto u = static_cast<uint128>(v);
-    bool add_neg = false;
-    if (v < 0) {
-      add_neg = true;
-      u = uint128{} - u;
-    }
-    PrintAsDec(u, add_neg);
-  }
-
-  void PrintAsDec(uint128 v, bool add_neg = false) {
-    // This function can be sped up if needed. We can call FastIntToBuffer
-    // twice, or fix FastIntToBuffer to support uint128.
-    char *p = storage_ + sizeof(storage_);
-    do {
-      p -= 2;
-      numbers_internal::PutTwoDigits(static_cast<size_t>(v % 100), p);
-      v /= 100;
-    } while (v);
-    if (p[0] == '0') {
-      // We printed one too many hexits.
-      ++p;
-    }
-    if (add_neg) {
-      *--p = '-';
-    }
-    size_ = storage_ + sizeof(storage_) - p;
-    start_ = p;
-  }
-
-  // Print the unsigned integer as hex using lowercase.
-  // Supports unsigned integral types and uint128.
-  template <typename T>
-  void PrintAsHexLower(T v) {
-    static_assert(!IsSigned<T>::value, "");
-    char *p = storage_ + sizeof(storage_);
-
-    do {
-      p -= 2;
-      constexpr const char* table = numbers_internal::kHexTable;
-      std::memcpy(p, table + 2 * (static_cast<size_t>(v) & 0xFF), 2);
-      if (sizeof(T) == 1) break;
-      v >>= 8;
-    } while (v);
-    if (p[0] == '0') {
-      // We printed one too many digits.
-      ++p;
-    }
-    start_ = p;
-    size_ = storage_ + sizeof(storage_) - p;
-  }
-
-  // Print the unsigned integer as hex using uppercase.
-  // Supports unsigned integral types and uint128.
-  template <typename T>
-  void PrintAsHexUpper(T v) {
-    static_assert(!IsSigned<T>::value, "");
-    char *p = storage_ + sizeof(storage_);
-
-    // kHexTable is only lowercase, so do it manually for uppercase.
-    do {
-      *--p = "0123456789ABCDEF"[static_cast<size_t>(v) & 15];
-      v >>= 4;
-    } while (v);
-    start_ = p;
-    size_ = storage_ + sizeof(storage_) - p;
-  }
-
-  // The printed value including the '-' sign if available.
-  // For inputs of value `0`, this will return "0"
-  string_view with_neg_and_zero() const { return {start_, size_}; }
-
-  // The printed value not including the '-' sign.
-  // For inputs of value `0`, this will return "".
-  string_view without_neg_or_zero() const {
-    static_assert('-' < '0', "The check below verifies both.");
-    size_t advance = start_[0] <= '0' ? 1 : 0;
-    return {start_ + advance, size_ - advance};
-  }
-
-  bool is_negative() const { return start_[0] == '-'; }
-
- private:
-  const char *start_;
-  size_t size_;
-  // Max size: 128 bit value as octal -> 43 digits, plus sign char
-  char storage_[128 / 3 + 1 + 1];
-};
-
-// Note: 'o' conversions do not have a base indicator, it's just that
-// the '#' flag is specified to modify the precision for 'o' conversions.
-string_view BaseIndicator(const IntDigits &as_digits,
-                          const FormatConversionSpecImpl conv) {
-  // always show 0x for %p.
-  bool alt = conv.has_alt_flag() ||
-             conv.conversion_char() == FormatConversionCharInternal::p;
-  bool hex = (conv.conversion_char() == FormatConversionCharInternal::x ||
-              conv.conversion_char() == FormatConversionCharInternal::X ||
-              conv.conversion_char() == FormatConversionCharInternal::p);
-  // From the POSIX description of '#' flag:
-  //   "For x or X conversion specifiers, a non-zero result shall have
-  //   0x (or 0X) prefixed to it."
-  if (alt && hex && !as_digits.without_neg_or_zero().empty()) {
-    return conv.conversion_char() == FormatConversionCharInternal::X ? "0X"
-                                                                     : "0x";
-  }
-  return {};
-}
-
-string_view SignColumn(bool neg, const FormatConversionSpecImpl conv) {
-  if (conv.conversion_char() == FormatConversionCharInternal::d ||
-      conv.conversion_char() == FormatConversionCharInternal::i) {
-    if (neg) return "-";
-    if (conv.has_show_pos_flag()) return "+";
-    if (conv.has_sign_col_flag()) return " ";
-  }
-  return {};
-}
-
-bool ConvertCharImpl(unsigned char v, const FormatConversionSpecImpl conv,
-                     FormatSinkImpl *sink) {
-  size_t fill = 0;
-  if (conv.width() >= 0) fill = conv.width();
-  ReducePadding(1, &fill);
-  if (!conv.has_left_flag()) sink->Append(fill, ' ');
-  sink->Append(1, v);
-  if (conv.has_left_flag()) sink->Append(fill, ' ');
-  return true;
-}
-
-bool ConvertIntImplInnerSlow(const IntDigits &as_digits,
-                             const FormatConversionSpecImpl conv,
-                             FormatSinkImpl *sink) {
-  // Print as a sequence of Substrings:
-  //   [left_spaces][sign][base_indicator][zeroes][formatted][right_spaces]
-  size_t fill = 0;
-  if (conv.width() >= 0) fill = conv.width();
-
-  string_view formatted = as_digits.without_neg_or_zero();
-  ReducePadding(formatted, &fill);
-
-  string_view sign = SignColumn(as_digits.is_negative(), conv);
-  ReducePadding(sign, &fill);
-
-  string_view base_indicator = BaseIndicator(as_digits, conv);
-  ReducePadding(base_indicator, &fill);
-
-  int precision = conv.precision();
-  bool precision_specified = precision >= 0;
-  if (!precision_specified)
-    precision = 1;
-
-  if (conv.has_alt_flag() &&
-      conv.conversion_char() == FormatConversionCharInternal::o) {
-    // From POSIX description of the '#' (alt) flag:
-    //   "For o conversion, it increases the precision (if necessary) to
-    //   force the first digit of the result to be zero."
-    if (formatted.empty() || *formatted.begin() != '0') {
-      int needed = static_cast<int>(formatted.size()) + 1;
-      precision = std::max(precision, needed);
-    }
-  }
-
-  size_t num_zeroes = Excess(formatted.size(), precision);
-  ReducePadding(num_zeroes, &fill);
-
-  size_t num_left_spaces = !conv.has_left_flag() ? fill : 0;
-  size_t num_right_spaces = conv.has_left_flag() ? fill : 0;
-
-  // From POSIX description of the '0' (zero) flag:
-  //   "For d, i, o, u, x, and X conversion specifiers, if a precision
-  //   is specified, the '0' flag is ignored."
-  if (!precision_specified && conv.has_zero_flag()) {
-    num_zeroes += num_left_spaces;
-    num_left_spaces = 0;
-  }
-
-  sink->Append(num_left_spaces, ' ');
-  sink->Append(sign);
-  sink->Append(base_indicator);
-  sink->Append(num_zeroes, '0');
-  sink->Append(formatted);
-  sink->Append(num_right_spaces, ' ');
-  return true;
-}
-
-template <typename T>
-bool ConvertIntArg(T v, const FormatConversionSpecImpl conv,
-                   FormatSinkImpl *sink) {
-  using U = typename MakeUnsigned<T>::type;
-  IntDigits as_digits;
-
-  // This odd casting is due to a bug in -Wswitch behavior in gcc49 which causes
-  // it to complain about a switch/case type mismatch, even though both are
-  // FormatConverionChar.  Likely this is because at this point
-  // FormatConversionChar is declared, but not defined.
-  switch (static_cast<uint8_t>(conv.conversion_char())) {
-    case static_cast<uint8_t>(FormatConversionCharInternal::c):
-      return ConvertCharImpl(static_cast<unsigned char>(v), conv, sink);
-
-    case static_cast<uint8_t>(FormatConversionCharInternal::o):
-      as_digits.PrintAsOct(static_cast<U>(v));
-      break;
-
-    case static_cast<uint8_t>(FormatConversionCharInternal::x):
-      as_digits.PrintAsHexLower(static_cast<U>(v));
-      break;
-    case static_cast<uint8_t>(FormatConversionCharInternal::X):
-      as_digits.PrintAsHexUpper(static_cast<U>(v));
-      break;
-
-    case static_cast<uint8_t>(FormatConversionCharInternal::u):
-      as_digits.PrintAsDec(static_cast<U>(v));
-      break;
-
-    case static_cast<uint8_t>(FormatConversionCharInternal::d):
-    case static_cast<uint8_t>(FormatConversionCharInternal::i):
-      as_digits.PrintAsDec(v);
-      break;
-
-    case static_cast<uint8_t>(FormatConversionCharInternal::a):
-    case static_cast<uint8_t>(FormatConversionCharInternal::e):
-    case static_cast<uint8_t>(FormatConversionCharInternal::f):
-    case static_cast<uint8_t>(FormatConversionCharInternal::g):
-    case static_cast<uint8_t>(FormatConversionCharInternal::A):
-    case static_cast<uint8_t>(FormatConversionCharInternal::E):
-    case static_cast<uint8_t>(FormatConversionCharInternal::F):
-    case static_cast<uint8_t>(FormatConversionCharInternal::G):
-      return ConvertFloatImpl(static_cast<double>(v), conv, sink);
-
-    default:
-       ABSL_INTERNAL_ASSUME(false);
-  }
-
-  if (conv.is_basic()) {
-    sink->Append(as_digits.with_neg_and_zero());
-    return true;
-  }
-  return ConvertIntImplInnerSlow(as_digits, conv, sink);
-}
-
-template <typename T>
-bool ConvertFloatArg(T v, const FormatConversionSpecImpl conv,
-                     FormatSinkImpl *sink) {
-  return FormatConversionCharIsFloat(conv.conversion_char()) &&
-         ConvertFloatImpl(v, conv, sink);
-}
-
-inline bool ConvertStringArg(string_view v, const FormatConversionSpecImpl conv,
-                             FormatSinkImpl *sink) {
-  if (conv.is_basic()) {
-    sink->Append(v);
-    return true;
-  }
-  return sink->PutPaddedString(v, conv.width(), conv.precision(),
-                               conv.has_left_flag());
-}
-
-}  // namespace
-
-// ==================== Strings ====================
-StringConvertResult FormatConvertImpl(const std::string &v,
-                                      const FormatConversionSpecImpl conv,
-                                      FormatSinkImpl *sink) {
-  return {ConvertStringArg(v, conv, sink)};
-}
-
-StringConvertResult FormatConvertImpl(string_view v,
-                                      const FormatConversionSpecImpl conv,
-                                      FormatSinkImpl *sink) {
-  return {ConvertStringArg(v, conv, sink)};
-}
-
-ArgConvertResult<FormatConversionCharSetUnion(
-    FormatConversionCharSetInternal::s, FormatConversionCharSetInternal::p)>
-FormatConvertImpl(const char *v, const FormatConversionSpecImpl conv,
-                  FormatSinkImpl *sink) {
-  if (conv.conversion_char() == FormatConversionCharInternal::p)
-    return {FormatConvertImpl(VoidPtr(v), conv, sink).value};
-  size_t len;
-  if (v == nullptr) {
-    len = 0;
-  } else if (conv.precision() < 0) {
-    len = std::strlen(v);
-  } else {
-    // If precision is set, we look for the NUL-terminator on the valid range.
-    len = std::find(v, v + conv.precision(), '\0') - v;
-  }
-  return {ConvertStringArg(string_view(v, len), conv, sink)};
-}
-
-// ==================== Raw pointers ====================
-ArgConvertResult<FormatConversionCharSetInternal::p> FormatConvertImpl(
-    VoidPtr v, const FormatConversionSpecImpl conv, FormatSinkImpl *sink) {
-  if (!v.value) {
-    sink->Append("(nil)");
-    return {true};
-  }
-  IntDigits as_digits;
-  as_digits.PrintAsHexLower(v.value);
-  return {ConvertIntImplInnerSlow(as_digits, conv, sink)};
-}
-
-// ==================== Floats ====================
-FloatingConvertResult FormatConvertImpl(float v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertFloatArg(v, conv, sink)};
-}
-FloatingConvertResult FormatConvertImpl(double v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertFloatArg(v, conv, sink)};
-}
-FloatingConvertResult FormatConvertImpl(long double v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertFloatArg(v, conv, sink)};
-}
-
-// ==================== Chars ====================
-IntegralConvertResult FormatConvertImpl(char v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(signed char v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(unsigned char v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-
-// ==================== Ints ====================
-IntegralConvertResult FormatConvertImpl(short v,  // NOLINT
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(unsigned short v,  // NOLINT
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(int v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(unsigned v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(long v,  // NOLINT
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(unsigned long v,  // NOLINT
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(long long v,  // NOLINT
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(unsigned long long v,  // NOLINT
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(absl::int128 v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-IntegralConvertResult FormatConvertImpl(absl::uint128 v,
-                                        const FormatConversionSpecImpl conv,
-                                        FormatSinkImpl *sink) {
-  return {ConvertIntArg(v, conv, sink)};
-}
-
-ABSL_INTERNAL_FORMAT_DISPATCH_OVERLOADS_EXPAND_();
-
-
-
-}  // namespace str_format_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/arg.h b/third_party/abseil/absl/strings/internal/str_format/arg.h
deleted file mode 100644
index 7040c86..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/arg.h
+++ /dev/null
@@ -1,518 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_ARG_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_ARG_H_
-
-#include <string.h>
-#include <wchar.h>
-
-#include <cstdio>
-#include <iomanip>
-#include <limits>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/port.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/internal/str_format/extension.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class Cord;
-class FormatCountCapture;
-class FormatSink;
-
-template <absl::FormatConversionCharSet C>
-struct FormatConvertResult;
-class FormatConversionSpec;
-
-namespace str_format_internal {
-
-template <typename T, typename = void>
-struct HasUserDefinedConvert : std::false_type {};
-
-template <typename T>
-struct HasUserDefinedConvert<T, void_t<decltype(AbslFormatConvert(
-                                    std::declval<const T&>(),
-                                    std::declval<const FormatConversionSpec&>(),
-                                    std::declval<FormatSink*>()))>>
-    : std::true_type {};
-
-void AbslFormatConvert();  // Stops the lexical name lookup
-template <typename T>
-auto FormatConvertImpl(const T& v, FormatConversionSpecImpl conv,
-                       FormatSinkImpl* sink)
-    -> decltype(AbslFormatConvert(v,
-                                  std::declval<const FormatConversionSpec&>(),
-                                  std::declval<FormatSink*>())) {
-  using FormatConversionSpecT =
-      absl::enable_if_t<sizeof(const T& (*)()) != 0, FormatConversionSpec>;
-  using FormatSinkT =
-      absl::enable_if_t<sizeof(const T& (*)()) != 0, FormatSink>;
-  auto fcs = conv.Wrap<FormatConversionSpecT>();
-  auto fs = sink->Wrap<FormatSinkT>();
-  return AbslFormatConvert(v, fcs, &fs);
-}
-
-template <typename T>
-class StreamedWrapper;
-
-// If 'v' can be converted (in the printf sense) according to 'conv',
-// then convert it, appending to `sink` and return `true`.
-// Otherwise fail and return `false`.
-
-// AbslFormatConvert(v, conv, sink) is intended to be found by ADL on 'v'
-// as an extension mechanism. These FormatConvertImpl functions are the default
-// implementations.
-// The ADL search is augmented via the 'Sink*' parameter, which also
-// serves as a disambiguator to reject possible unintended 'AbslFormatConvert'
-// functions in the namespaces associated with 'v'.
-
-// Raw pointers.
-struct VoidPtr {
-  VoidPtr() = default;
-  template <typename T,
-            decltype(reinterpret_cast<uintptr_t>(std::declval<T*>())) = 0>
-  VoidPtr(T* ptr)  // NOLINT
-      : value(ptr ? reinterpret_cast<uintptr_t>(ptr) : 0) {}
-  uintptr_t value;
-};
-
-template <FormatConversionCharSet C>
-struct ArgConvertResult {
-  bool value;
-};
-
-template <FormatConversionCharSet C>
-constexpr FormatConversionCharSet ExtractCharSet(FormatConvertResult<C>) {
-  return C;
-}
-
-template <FormatConversionCharSet C>
-constexpr FormatConversionCharSet ExtractCharSet(ArgConvertResult<C>) {
-  return C;
-}
-
-using StringConvertResult =
-    ArgConvertResult<FormatConversionCharSetInternal::s>;
-ArgConvertResult<FormatConversionCharSetInternal::p> FormatConvertImpl(
-    VoidPtr v, FormatConversionSpecImpl conv, FormatSinkImpl* sink);
-
-// Strings.
-StringConvertResult FormatConvertImpl(const std::string& v,
-                                      FormatConversionSpecImpl conv,
-                                      FormatSinkImpl* sink);
-StringConvertResult FormatConvertImpl(string_view v,
-                                      FormatConversionSpecImpl conv,
-                                      FormatSinkImpl* sink);
-ArgConvertResult<FormatConversionCharSetUnion(
-    FormatConversionCharSetInternal::s, FormatConversionCharSetInternal::p)>
-FormatConvertImpl(const char* v, const FormatConversionSpecImpl conv,
-                  FormatSinkImpl* sink);
-
-template <class AbslCord, typename std::enable_if<std::is_same<
-                              AbslCord, absl::Cord>::value>::type* = nullptr>
-StringConvertResult FormatConvertImpl(const AbslCord& value,
-                                      FormatConversionSpecImpl conv,
-                                      FormatSinkImpl* sink) {
-  bool is_left = conv.has_left_flag();
-  size_t space_remaining = 0;
-
-  int width = conv.width();
-  if (width >= 0) space_remaining = width;
-
-  size_t to_write = value.size();
-
-  int precision = conv.precision();
-  if (precision >= 0)
-    to_write = (std::min)(to_write, static_cast<size_t>(precision));
-
-  space_remaining = Excess(to_write, space_remaining);
-
-  if (space_remaining > 0 && !is_left) sink->Append(space_remaining, ' ');
-
-  for (string_view piece : value.Chunks()) {
-    if (piece.size() > to_write) {
-      piece.remove_suffix(piece.size() - to_write);
-      to_write = 0;
-    } else {
-      to_write -= piece.size();
-    }
-    sink->Append(piece);
-    if (to_write == 0) {
-      break;
-    }
-  }
-
-  if (space_remaining > 0 && is_left) sink->Append(space_remaining, ' ');
-  return {true};
-}
-
-using IntegralConvertResult = ArgConvertResult<FormatConversionCharSetUnion(
-    FormatConversionCharSetInternal::c,
-    FormatConversionCharSetInternal::kNumeric,
-    FormatConversionCharSetInternal::kStar)>;
-using FloatingConvertResult =
-    ArgConvertResult<FormatConversionCharSetInternal::kFloating>;
-
-// Floats.
-FloatingConvertResult FormatConvertImpl(float v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-FloatingConvertResult FormatConvertImpl(double v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-FloatingConvertResult FormatConvertImpl(long double v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-
-// Chars.
-IntegralConvertResult FormatConvertImpl(char v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(signed char v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(unsigned char v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-
-// Ints.
-IntegralConvertResult FormatConvertImpl(short v,  // NOLINT
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(unsigned short v,  // NOLINT
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(int v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(unsigned v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(long v,  // NOLINT
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(unsigned long v,  // NOLINT
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(long long v,  // NOLINT
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(unsigned long long v,  // NOLINT
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(int128 v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-IntegralConvertResult FormatConvertImpl(uint128 v,
-                                        FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink);
-template <typename T, enable_if_t<std::is_same<T, bool>::value, int> = 0>
-IntegralConvertResult FormatConvertImpl(T v, FormatConversionSpecImpl conv,
-                                        FormatSinkImpl* sink) {
-  return FormatConvertImpl(static_cast<int>(v), conv, sink);
-}
-
-// We provide this function to help the checker, but it is never defined.
-// FormatArgImpl will use the underlying Convert functions instead.
-template <typename T>
-typename std::enable_if<std::is_enum<T>::value &&
-                            !HasUserDefinedConvert<T>::value,
-                        IntegralConvertResult>::type
-FormatConvertImpl(T v, FormatConversionSpecImpl conv, FormatSinkImpl* sink);
-
-template <typename T>
-StringConvertResult FormatConvertImpl(const StreamedWrapper<T>& v,
-                                      FormatConversionSpecImpl conv,
-                                      FormatSinkImpl* out) {
-  std::ostringstream oss;
-  oss << v.v_;
-  if (!oss) return {false};
-  return str_format_internal::FormatConvertImpl(oss.str(), conv, out);
-}
-
-// Use templates and dependent types to delay evaluation of the function
-// until after FormatCountCapture is fully defined.
-struct FormatCountCaptureHelper {
-  template <class T = int>
-  static ArgConvertResult<FormatConversionCharSetInternal::n> ConvertHelper(
-      const FormatCountCapture& v, FormatConversionSpecImpl conv,
-      FormatSinkImpl* sink) {
-    const absl::enable_if_t<sizeof(T) != 0, FormatCountCapture>& v2 = v;
-
-    if (conv.conversion_char() !=
-        str_format_internal::FormatConversionCharInternal::n) {
-      return {false};
-    }
-    *v2.p_ = static_cast<int>(sink->size());
-    return {true};
-  }
-};
-
-template <class T = int>
-ArgConvertResult<FormatConversionCharSetInternal::n> FormatConvertImpl(
-    const FormatCountCapture& v, FormatConversionSpecImpl conv,
-    FormatSinkImpl* sink) {
-  return FormatCountCaptureHelper::ConvertHelper(v, conv, sink);
-}
-
-// Helper friend struct to hide implementation details from the public API of
-// FormatArgImpl.
-struct FormatArgImplFriend {
-  template <typename Arg>
-  static bool ToInt(Arg arg, int* out) {
-    // A value initialized FormatConversionSpecImpl has a `none` conv, which
-    // tells the dispatcher to run the `int` conversion.
-    return arg.dispatcher_(arg.data_, {}, out);
-  }
-
-  template <typename Arg>
-  static bool Convert(Arg arg, FormatConversionSpecImpl conv,
-                      FormatSinkImpl* out) {
-    return arg.dispatcher_(arg.data_, conv, out);
-  }
-
-  template <typename Arg>
-  static typename Arg::Dispatcher GetVTablePtrForTest(Arg arg) {
-    return arg.dispatcher_;
-  }
-};
-
-template <typename Arg>
-constexpr FormatConversionCharSet ArgumentToConv() {
-  return absl::str_format_internal::ExtractCharSet(
-      decltype(str_format_internal::FormatConvertImpl(
-          std::declval<const Arg&>(),
-          std::declval<const FormatConversionSpecImpl&>(),
-          std::declval<FormatSinkImpl*>())){});
-}
-
-// A type-erased handle to a format argument.
-class FormatArgImpl {
- private:
-  enum { kInlinedSpace = 8 };
-
-  using VoidPtr = str_format_internal::VoidPtr;
-
-  union Data {
-    const void* ptr;
-    const volatile void* volatile_ptr;
-    char buf[kInlinedSpace];
-  };
-
-  using Dispatcher = bool (*)(Data, FormatConversionSpecImpl, void* out);
-
-  template <typename T>
-  struct store_by_value
-      : std::integral_constant<bool, (sizeof(T) <= kInlinedSpace) &&
-                                         (std::is_integral<T>::value ||
-                                          std::is_floating_point<T>::value ||
-                                          std::is_pointer<T>::value ||
-                                          std::is_same<VoidPtr, T>::value)> {};
-
-  enum StoragePolicy { ByPointer, ByVolatilePointer, ByValue };
-  template <typename T>
-  struct storage_policy
-      : std::integral_constant<StoragePolicy,
-                               (std::is_volatile<T>::value
-                                    ? ByVolatilePointer
-                                    : (store_by_value<T>::value ? ByValue
-                                                                : ByPointer))> {
-  };
-
-  // To reduce the number of vtables we will decay values before hand.
-  // Anything with a user-defined Convert will get its own vtable.
-  // For everything else:
-  //   - Decay char* and char arrays into `const char*`
-  //   - Decay any other pointer to `const void*`
-  //   - Decay all enums to their underlying type.
-  //   - Decay function pointers to void*.
-  template <typename T, typename = void>
-  struct DecayType {
-    static constexpr bool kHasUserDefined =
-        str_format_internal::HasUserDefinedConvert<T>::value;
-    using type = typename std::conditional<
-        !kHasUserDefined && std::is_convertible<T, const char*>::value,
-        const char*,
-        typename std::conditional<!kHasUserDefined &&
-                                      std::is_convertible<T, VoidPtr>::value,
-                                  VoidPtr, const T&>::type>::type;
-  };
-  template <typename T>
-  struct DecayType<T,
-                   typename std::enable_if<
-                       !str_format_internal::HasUserDefinedConvert<T>::value &&
-                       std::is_enum<T>::value>::type> {
-    using type = typename std::underlying_type<T>::type;
-  };
-
- public:
-  template <typename T>
-  explicit FormatArgImpl(const T& value) {
-    using D = typename DecayType<T>::type;
-    static_assert(
-        std::is_same<D, const T&>::value || storage_policy<D>::value == ByValue,
-        "Decayed types must be stored by value");
-    Init(static_cast<D>(value));
-  }
-
- private:
-  friend struct str_format_internal::FormatArgImplFriend;
-  template <typename T, StoragePolicy = storage_policy<T>::value>
-  struct Manager;
-
-  template <typename T>
-  struct Manager<T, ByPointer> {
-    static Data SetValue(const T& value) {
-      Data data;
-      data.ptr = std::addressof(value);
-      return data;
-    }
-
-    static const T& Value(Data arg) { return *static_cast<const T*>(arg.ptr); }
-  };
-
-  template <typename T>
-  struct Manager<T, ByVolatilePointer> {
-    static Data SetValue(const T& value) {
-      Data data;
-      data.volatile_ptr = &value;
-      return data;
-    }
-
-    static const T& Value(Data arg) {
-      return *static_cast<const T*>(arg.volatile_ptr);
-    }
-  };
-
-  template <typename T>
-  struct Manager<T, ByValue> {
-    static Data SetValue(const T& value) {
-      Data data;
-      memcpy(data.buf, &value, sizeof(value));
-      return data;
-    }
-
-    static T Value(Data arg) {
-      T value;
-      memcpy(&value, arg.buf, sizeof(T));
-      return value;
-    }
-  };
-
-  template <typename T>
-  void Init(const T& value) {
-    data_ = Manager<T>::SetValue(value);
-    dispatcher_ = &Dispatch<T>;
-  }
-
-  template <typename T>
-  static int ToIntVal(const T& val) {
-    using CommonType = typename std::conditional<std::is_signed<T>::value,
-                                                 int64_t, uint64_t>::type;
-    if (static_cast<CommonType>(val) >
-        static_cast<CommonType>((std::numeric_limits<int>::max)())) {
-      return (std::numeric_limits<int>::max)();
-    } else if (std::is_signed<T>::value &&
-               static_cast<CommonType>(val) <
-                   static_cast<CommonType>((std::numeric_limits<int>::min)())) {
-      return (std::numeric_limits<int>::min)();
-    }
-    return static_cast<int>(val);
-  }
-
-  template <typename T>
-  static bool ToInt(Data arg, int* out, std::true_type /* is_integral */,
-                    std::false_type) {
-    *out = ToIntVal(Manager<T>::Value(arg));
-    return true;
-  }
-
-  template <typename T>
-  static bool ToInt(Data arg, int* out, std::false_type,
-                    std::true_type /* is_enum */) {
-    *out = ToIntVal(static_cast<typename std::underlying_type<T>::type>(
-        Manager<T>::Value(arg)));
-    return true;
-  }
-
-  template <typename T>
-  static bool ToInt(Data, int*, std::false_type, std::false_type) {
-    return false;
-  }
-
-  template <typename T>
-  static bool Dispatch(Data arg, FormatConversionSpecImpl spec, void* out) {
-    // A `none` conv indicates that we want the `int` conversion.
-    if (ABSL_PREDICT_FALSE(spec.conversion_char() ==
-                           FormatConversionCharInternal::kNone)) {
-      return ToInt<T>(arg, static_cast<int*>(out), std::is_integral<T>(),
-                      std::is_enum<T>());
-    }
-    if (ABSL_PREDICT_FALSE(!Contains(ArgumentToConv<T>(),
-                                     spec.conversion_char()))) {
-      return false;
-    }
-    return str_format_internal::FormatConvertImpl(
-               Manager<T>::Value(arg), spec,
-               static_cast<FormatSinkImpl*>(out))
-        .value;
-  }
-
-  Data data_;
-  Dispatcher dispatcher_;
-};
-
-#define ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(T, E)                     \
-  E template bool FormatArgImpl::Dispatch<T>(Data, FormatConversionSpecImpl, \
-                                             void*)
-
-#define ABSL_INTERNAL_FORMAT_DISPATCH_OVERLOADS_EXPAND_(...)                   \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(str_format_internal::VoidPtr,     \
-                                             __VA_ARGS__);                     \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(bool, __VA_ARGS__);               \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(char, __VA_ARGS__);               \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(signed char, __VA_ARGS__);        \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(unsigned char, __VA_ARGS__);      \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(short, __VA_ARGS__); /* NOLINT */ \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(unsigned short,      /* NOLINT */ \
-                                             __VA_ARGS__);                     \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(int, __VA_ARGS__);                \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(unsigned int, __VA_ARGS__);       \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(long, __VA_ARGS__); /* NOLINT */  \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(unsigned long,      /* NOLINT */  \
-                                             __VA_ARGS__);                     \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(long long, /* NOLINT */           \
-                                             __VA_ARGS__);                     \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(unsigned long long, /* NOLINT */  \
-                                             __VA_ARGS__);                     \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(int128, __VA_ARGS__);             \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(uint128, __VA_ARGS__);            \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(float, __VA_ARGS__);              \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(double, __VA_ARGS__);             \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(long double, __VA_ARGS__);        \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(const char*, __VA_ARGS__);        \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(std::string, __VA_ARGS__);        \
-  ABSL_INTERNAL_FORMAT_DISPATCH_INSTANTIATE_(string_view, __VA_ARGS__)
-
-ABSL_INTERNAL_FORMAT_DISPATCH_OVERLOADS_EXPAND_(extern);
-
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_ARG_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/arg_test.cc b/third_party/abseil/absl/strings/internal/str_format/arg_test.cc
deleted file mode 100644
index 1261937..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/arg_test.cc
+++ /dev/null
@@ -1,130 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/arg.h"
-
-#include <ostream>
-#include <string>
-#include "gtest/gtest.h"
-#include "absl/strings/str_format.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-namespace {
-
-class FormatArgImplTest : public ::testing::Test {
- public:
-  enum Color { kRed, kGreen, kBlue };
-
-  static const char *hi() { return "hi"; }
-
-  struct X {};
-
-  X x_;
-};
-
-inline FormatConvertResult<FormatConversionCharSet{}> AbslFormatConvert(
-    const FormatArgImplTest::X &, const FormatConversionSpec &, FormatSink *) {
-  return {false};
-}
-
-TEST_F(FormatArgImplTest, ToInt) {
-  int out = 0;
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(FormatArgImpl(1), &out));
-  EXPECT_EQ(1, out);
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(FormatArgImpl(-1), &out));
-  EXPECT_EQ(-1, out);
-  EXPECT_TRUE(
-      FormatArgImplFriend::ToInt(FormatArgImpl(static_cast<char>(64)), &out));
-  EXPECT_EQ(64, out);
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(
-      FormatArgImpl(static_cast<unsigned long long>(123456)), &out));  // NOLINT
-  EXPECT_EQ(123456, out);
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(
-      FormatArgImpl(static_cast<unsigned long long>(  // NOLINT
-                        std::numeric_limits<int>::max()) +
-                    1),
-      &out));
-  EXPECT_EQ(std::numeric_limits<int>::max(), out);
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(
-      FormatArgImpl(static_cast<long long>(  // NOLINT
-                        std::numeric_limits<int>::min()) -
-                    10),
-      &out));
-  EXPECT_EQ(std::numeric_limits<int>::min(), out);
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(FormatArgImpl(false), &out));
-  EXPECT_EQ(0, out);
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(FormatArgImpl(true), &out));
-  EXPECT_EQ(1, out);
-  EXPECT_FALSE(FormatArgImplFriend::ToInt(FormatArgImpl(2.2), &out));
-  EXPECT_FALSE(FormatArgImplFriend::ToInt(FormatArgImpl(3.2f), &out));
-  EXPECT_FALSE(FormatArgImplFriend::ToInt(
-      FormatArgImpl(static_cast<int *>(nullptr)), &out));
-  EXPECT_FALSE(FormatArgImplFriend::ToInt(FormatArgImpl(hi()), &out));
-  EXPECT_FALSE(FormatArgImplFriend::ToInt(FormatArgImpl("hi"), &out));
-  EXPECT_FALSE(FormatArgImplFriend::ToInt(FormatArgImpl(x_), &out));
-  EXPECT_TRUE(FormatArgImplFriend::ToInt(FormatArgImpl(kBlue), &out));
-  EXPECT_EQ(2, out);
-}
-
-extern const char kMyArray[];
-
-TEST_F(FormatArgImplTest, CharArraysDecayToCharPtr) {
-  const char* a = "";
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl(a)),
-            FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl("")));
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl(a)),
-            FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl("A")));
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl(a)),
-            FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl("ABC")));
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl(a)),
-            FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl(kMyArray)));
-}
-
-TEST_F(FormatArgImplTest, OtherPtrDecayToVoidPtr) {
-  auto expected = FormatArgImplFriend::GetVTablePtrForTest(
-      FormatArgImpl(static_cast<void *>(nullptr)));
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(
-                FormatArgImpl(static_cast<int *>(nullptr))),
-            expected);
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(
-                FormatArgImpl(static_cast<volatile int *>(nullptr))),
-            expected);
-
-  auto p = static_cast<void (*)()>([] {});
-  EXPECT_EQ(FormatArgImplFriend::GetVTablePtrForTest(FormatArgImpl(p)),
-            expected);
-}
-
-TEST_F(FormatArgImplTest, WorksWithCharArraysOfUnknownSize) {
-  std::string s;
-  FormatSinkImpl sink(&s);
-  FormatConversionSpecImpl conv;
-  FormatConversionSpecImplFriend::SetConversionChar(
-      FormatConversionCharInternal::s, &conv);
-  FormatConversionSpecImplFriend::SetFlags(Flags(), &conv);
-  FormatConversionSpecImplFriend::SetWidth(-1, &conv);
-  FormatConversionSpecImplFriend::SetPrecision(-1, &conv);
-  EXPECT_TRUE(
-      FormatArgImplFriend::Convert(FormatArgImpl(kMyArray), conv, &sink));
-  sink.Flush();
-  EXPECT_EQ("ABCDE", s);
-}
-const char kMyArray[] = "ABCDE";
-
-}  // namespace
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/bind.cc b/third_party/abseil/absl/strings/internal/str_format/bind.cc
deleted file mode 100644
index 4e68b90..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/bind.cc
+++ /dev/null
@@ -1,259 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/bind.h"
-
-#include <cerrno>
-#include <limits>
-#include <sstream>
-#include <string>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-namespace {
-
-inline bool BindFromPosition(int position, int* value,
-                             absl::Span<const FormatArgImpl> pack) {
-  assert(position > 0);
-  if (static_cast<size_t>(position) > pack.size()) {
-    return false;
-  }
-  // -1 because positions are 1-based
-  return FormatArgImplFriend::ToInt(pack[position - 1], value);
-}
-
-class ArgContext {
- public:
-  explicit ArgContext(absl::Span<const FormatArgImpl> pack) : pack_(pack) {}
-
-  // Fill 'bound' with the results of applying the context's argument pack
-  // to the specified 'unbound'. We synthesize a BoundConversion by
-  // lining up a UnboundConversion with a user argument. We also
-  // resolve any '*' specifiers for width and precision, so after
-  // this call, 'bound' has all the information it needs to be formatted.
-  // Returns false on failure.
-  bool Bind(const UnboundConversion* unbound, BoundConversion* bound);
-
- private:
-  absl::Span<const FormatArgImpl> pack_;
-};
-
-inline bool ArgContext::Bind(const UnboundConversion* unbound,
-                             BoundConversion* bound) {
-  const FormatArgImpl* arg = nullptr;
-  int arg_position = unbound->arg_position;
-  if (static_cast<size_t>(arg_position - 1) >= pack_.size()) return false;
-  arg = &pack_[arg_position - 1];  // 1-based
-
-  if (!unbound->flags.basic) {
-    int width = unbound->width.value();
-    bool force_left = false;
-    if (unbound->width.is_from_arg()) {
-      if (!BindFromPosition(unbound->width.get_from_arg(), &width, pack_))
-        return false;
-      if (width < 0) {
-        // "A negative field width is taken as a '-' flag followed by a
-        // positive field width."
-        force_left = true;
-        // Make sure we don't overflow the width when negating it.
-        width = -std::max(width, -std::numeric_limits<int>::max());
-      }
-    }
-
-    int precision = unbound->precision.value();
-    if (unbound->precision.is_from_arg()) {
-      if (!BindFromPosition(unbound->precision.get_from_arg(), &precision,
-                            pack_))
-        return false;
-    }
-
-    FormatConversionSpecImplFriend::SetWidth(width, bound);
-    FormatConversionSpecImplFriend::SetPrecision(precision, bound);
-
-    if (force_left) {
-      Flags flags = unbound->flags;
-      flags.left = true;
-      FormatConversionSpecImplFriend::SetFlags(flags, bound);
-    } else {
-      FormatConversionSpecImplFriend::SetFlags(unbound->flags, bound);
-    }
-  } else {
-    FormatConversionSpecImplFriend::SetFlags(unbound->flags, bound);
-    FormatConversionSpecImplFriend::SetWidth(-1, bound);
-    FormatConversionSpecImplFriend::SetPrecision(-1, bound);
-  }
-  FormatConversionSpecImplFriend::SetConversionChar(unbound->conv, bound);
-  bound->set_arg(arg);
-  return true;
-}
-
-template <typename Converter>
-class ConverterConsumer {
- public:
-  ConverterConsumer(Converter converter, absl::Span<const FormatArgImpl> pack)
-      : converter_(converter), arg_context_(pack) {}
-
-  bool Append(string_view s) {
-    converter_.Append(s);
-    return true;
-  }
-  bool ConvertOne(const UnboundConversion& conv, string_view conv_string) {
-    BoundConversion bound;
-    if (!arg_context_.Bind(&conv, &bound)) return false;
-    return converter_.ConvertOne(bound, conv_string);
-  }
-
- private:
-  Converter converter_;
-  ArgContext arg_context_;
-};
-
-template <typename Converter>
-bool ConvertAll(const UntypedFormatSpecImpl format,
-                absl::Span<const FormatArgImpl> args, Converter converter) {
-  if (format.has_parsed_conversion()) {
-    return format.parsed_conversion()->ProcessFormat(
-        ConverterConsumer<Converter>(converter, args));
-  } else {
-    return ParseFormatString(format.str(),
-                             ConverterConsumer<Converter>(converter, args));
-  }
-}
-
-class DefaultConverter {
- public:
-  explicit DefaultConverter(FormatSinkImpl* sink) : sink_(sink) {}
-
-  void Append(string_view s) const { sink_->Append(s); }
-
-  bool ConvertOne(const BoundConversion& bound, string_view /*conv*/) const {
-    return FormatArgImplFriend::Convert(*bound.arg(), bound, sink_);
-  }
-
- private:
-  FormatSinkImpl* sink_;
-};
-
-class SummarizingConverter {
- public:
-  explicit SummarizingConverter(FormatSinkImpl* sink) : sink_(sink) {}
-
-  void Append(string_view s) const { sink_->Append(s); }
-
-  bool ConvertOne(const BoundConversion& bound, string_view /*conv*/) const {
-    UntypedFormatSpecImpl spec("%d");
-
-    std::ostringstream ss;
-    ss << "{" << Streamable(spec, {*bound.arg()}) << ":"
-       << FormatConversionSpecImplFriend::FlagsToString(bound);
-    if (bound.width() >= 0) ss << bound.width();
-    if (bound.precision() >= 0) ss << "." << bound.precision();
-    ss << bound.conversion_char() << "}";
-    Append(ss.str());
-    return true;
-  }
-
- private:
-  FormatSinkImpl* sink_;
-};
-
-}  // namespace
-
-bool BindWithPack(const UnboundConversion* props,
-                  absl::Span<const FormatArgImpl> pack,
-                  BoundConversion* bound) {
-  return ArgContext(pack).Bind(props, bound);
-}
-
-std::string Summarize(const UntypedFormatSpecImpl format,
-                      absl::Span<const FormatArgImpl> args) {
-  typedef SummarizingConverter Converter;
-  std::string out;
-  {
-    // inner block to destroy sink before returning out. It ensures a last
-    // flush.
-    FormatSinkImpl sink(&out);
-    if (!ConvertAll(format, args, Converter(&sink))) {
-      return "";
-    }
-  }
-  return out;
-}
-
-bool FormatUntyped(FormatRawSinkImpl raw_sink,
-                   const UntypedFormatSpecImpl format,
-                   absl::Span<const FormatArgImpl> args) {
-  FormatSinkImpl sink(raw_sink);
-  using Converter = DefaultConverter;
-  return ConvertAll(format, args, Converter(&sink));
-}
-
-std::ostream& Streamable::Print(std::ostream& os) const {
-  if (!FormatUntyped(&os, format_, args_)) os.setstate(std::ios::failbit);
-  return os;
-}
-
-std::string& AppendPack(std::string* out, const UntypedFormatSpecImpl format,
-                        absl::Span<const FormatArgImpl> args) {
-  size_t orig = out->size();
-  if (ABSL_PREDICT_FALSE(!FormatUntyped(out, format, args))) {
-    out->erase(orig);
-  }
-  return *out;
-}
-
-std::string FormatPack(const UntypedFormatSpecImpl format,
-                       absl::Span<const FormatArgImpl> args) {
-  std::string out;
-  if (ABSL_PREDICT_FALSE(!FormatUntyped(&out, format, args))) {
-    out.clear();
-  }
-  return out;
-}
-
-int FprintF(std::FILE* output, const UntypedFormatSpecImpl format,
-            absl::Span<const FormatArgImpl> args) {
-  FILERawSink sink(output);
-  if (!FormatUntyped(&sink, format, args)) {
-    errno = EINVAL;
-    return -1;
-  }
-  if (sink.error()) {
-    errno = sink.error();
-    return -1;
-  }
-  if (sink.count() > static_cast<size_t>(std::numeric_limits<int>::max())) {
-    errno = EFBIG;
-    return -1;
-  }
-  return static_cast<int>(sink.count());
-}
-
-int SnprintF(char* output, size_t size, const UntypedFormatSpecImpl format,
-             absl::Span<const FormatArgImpl> args) {
-  BufferRawSink sink(output, size ? size - 1 : 0);
-  if (!FormatUntyped(&sink, format, args)) {
-    errno = EINVAL;
-    return -1;
-  }
-  size_t total = sink.total_written();
-  if (size) output[std::min(total, size - 1)] = 0;
-  return static_cast<int>(total);
-}
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/bind.h b/third_party/abseil/absl/strings/internal/str_format/bind.h
deleted file mode 100644
index 267cc0e..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/bind.h
+++ /dev/null
@@ -1,217 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_BIND_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_BIND_H_
-
-#include <array>
-#include <cstdio>
-#include <sstream>
-#include <string>
-
-#include "absl/base/port.h"
-#include "absl/strings/internal/str_format/arg.h"
-#include "absl/strings/internal/str_format/checker.h"
-#include "absl/strings/internal/str_format/parser.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class UntypedFormatSpec;
-
-namespace str_format_internal {
-
-class BoundConversion : public FormatConversionSpecImpl {
- public:
-  const FormatArgImpl* arg() const { return arg_; }
-  void set_arg(const FormatArgImpl* a) { arg_ = a; }
-
- private:
-  const FormatArgImpl* arg_;
-};
-
-// This is the type-erased class that the implementation uses.
-class UntypedFormatSpecImpl {
- public:
-  UntypedFormatSpecImpl() = delete;
-
-  explicit UntypedFormatSpecImpl(string_view s)
-      : data_(s.data()), size_(s.size()) {}
-  explicit UntypedFormatSpecImpl(
-      const str_format_internal::ParsedFormatBase* pc)
-      : data_(pc), size_(~size_t{}) {}
-
-  bool has_parsed_conversion() const { return size_ == ~size_t{}; }
-
-  string_view str() const {
-    assert(!has_parsed_conversion());
-    return string_view(static_cast<const char*>(data_), size_);
-  }
-  const str_format_internal::ParsedFormatBase* parsed_conversion() const {
-    assert(has_parsed_conversion());
-    return static_cast<const str_format_internal::ParsedFormatBase*>(data_);
-  }
-
-  template <typename T>
-  static const UntypedFormatSpecImpl& Extract(const T& s) {
-    return s.spec_;
-  }
-
- private:
-  const void* data_;
-  size_t size_;
-};
-
-template <typename T, FormatConversionCharSet...>
-struct MakeDependent {
-  using type = T;
-};
-
-// Implicitly convertible from `const char*`, `string_view`, and the
-// `ExtendedParsedFormat` type. This abstraction allows all format functions to
-// operate on any without providing too many overloads.
-template <FormatConversionCharSet... Args>
-class FormatSpecTemplate
-    : public MakeDependent<UntypedFormatSpec, Args...>::type {
-  using Base = typename MakeDependent<UntypedFormatSpec, Args...>::type;
-
- public:
-#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-  // Honeypot overload for when the string is not constexpr.
-  // We use the 'unavailable' attribute to give a better compiler error than
-  // just 'method is deleted'.
-  FormatSpecTemplate(...)  // NOLINT
-      __attribute__((unavailable("Format string is not constexpr.")));
-
-  // Honeypot overload for when the format is constexpr and invalid.
-  // We use the 'unavailable' attribute to give a better compiler error than
-  // just 'method is deleted'.
-  // To avoid checking the format twice, we just check that the format is
-  // constexpr. If is it valid, then the overload below will kick in.
-  // We add the template here to make this overload have lower priority.
-  template <typename = void>
-  FormatSpecTemplate(const char* s)  // NOLINT
-      __attribute__((
-          enable_if(str_format_internal::EnsureConstexpr(s), "constexpr trap"),
-          unavailable(
-              "Format specified does not match the arguments passed.")));
-
-  template <typename T = void>
-  FormatSpecTemplate(string_view s)  // NOLINT
-      __attribute__((enable_if(str_format_internal::EnsureConstexpr(s),
-                               "constexpr trap"))) {
-    static_assert(sizeof(T*) == 0,
-                  "Format specified does not match the arguments passed.");
-  }
-
-  // Good format overload.
-  FormatSpecTemplate(const char* s)  // NOLINT
-      __attribute__((enable_if(ValidFormatImpl<Args...>(s), "bad format trap")))
-      : Base(s) {}
-
-  FormatSpecTemplate(string_view s)  // NOLINT
-      __attribute__((enable_if(ValidFormatImpl<Args...>(s), "bad format trap")))
-      : Base(s) {}
-
-#else  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-  FormatSpecTemplate(const char* s) : Base(s) {}  // NOLINT
-  FormatSpecTemplate(string_view s) : Base(s) {}  // NOLINT
-
-#endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-  template <
-      FormatConversionCharSet... C,
-      typename = typename std::enable_if<sizeof...(C) == sizeof...(Args)>::type,
-      typename = typename std::enable_if<AllOf(Contains(Args,
-                                                        C)...)>::type>
-  FormatSpecTemplate(const ExtendedParsedFormat<C...>& pc)  // NOLINT
-      : Base(&pc) {}
-};
-
-class Streamable {
- public:
-  Streamable(const UntypedFormatSpecImpl& format,
-             absl::Span<const FormatArgImpl> args)
-      : format_(format) {
-    if (args.size() <= ABSL_ARRAYSIZE(few_args_)) {
-      for (size_t i = 0; i < args.size(); ++i) {
-        few_args_[i] = args[i];
-      }
-      args_ = absl::MakeSpan(few_args_, args.size());
-    } else {
-      many_args_.assign(args.begin(), args.end());
-      args_ = many_args_;
-    }
-  }
-
-  std::ostream& Print(std::ostream& os) const;
-
-  friend std::ostream& operator<<(std::ostream& os, const Streamable& l) {
-    return l.Print(os);
-  }
-
- private:
-  const UntypedFormatSpecImpl& format_;
-  absl::Span<const FormatArgImpl> args_;
-  // if args_.size() is 4 or less:
-  FormatArgImpl few_args_[4] = {FormatArgImpl(0), FormatArgImpl(0),
-                                FormatArgImpl(0), FormatArgImpl(0)};
-  // if args_.size() is more than 4:
-  std::vector<FormatArgImpl> many_args_;
-};
-
-// for testing
-std::string Summarize(UntypedFormatSpecImpl format,
-                      absl::Span<const FormatArgImpl> args);
-bool BindWithPack(const UnboundConversion* props,
-                  absl::Span<const FormatArgImpl> pack, BoundConversion* bound);
-
-bool FormatUntyped(FormatRawSinkImpl raw_sink,
-                   UntypedFormatSpecImpl format,
-                   absl::Span<const FormatArgImpl> args);
-
-std::string& AppendPack(std::string* out, UntypedFormatSpecImpl format,
-                        absl::Span<const FormatArgImpl> args);
-
-std::string FormatPack(const UntypedFormatSpecImpl format,
-                       absl::Span<const FormatArgImpl> args);
-
-int FprintF(std::FILE* output, UntypedFormatSpecImpl format,
-            absl::Span<const FormatArgImpl> args);
-int SnprintF(char* output, size_t size, UntypedFormatSpecImpl format,
-             absl::Span<const FormatArgImpl> args);
-
-// Returned by Streamed(v). Converts via '%s' to the std::string created
-// by std::ostream << v.
-template <typename T>
-class StreamedWrapper {
- public:
-  explicit StreamedWrapper(const T& v) : v_(v) { }
-
- private:
-  template <typename S>
-  friend ArgConvertResult<FormatConversionCharSetInternal::s> FormatConvertImpl(
-      const StreamedWrapper<S>& v, FormatConversionSpecImpl conv,
-      FormatSinkImpl* out);
-  const T& v_;
-};
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_BIND_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/bind_test.cc b/third_party/abseil/absl/strings/internal/str_format/bind_test.cc
deleted file mode 100644
index 1eef9c4..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/bind_test.cc
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/bind.h"
-
-#include <string.h>
-#include <limits>
-
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-namespace {
-
-class FormatBindTest : public ::testing::Test {
- public:
-  bool Extract(const char *s, UnboundConversion *props, int *next) const {
-    return ConsumeUnboundConversion(s, s + strlen(s), props, next) ==
-           s + strlen(s);
-  }
-};
-
-TEST_F(FormatBindTest, BindSingle) {
-  struct Expectation {
-    int line;
-    const char *fmt;
-    int ok_phases;
-    const FormatArgImpl *arg;
-    int width;
-    int precision;
-    int next_arg;
-  };
-  const int no = -1;
-  const int ia[] = { 10, 20, 30, 40};
-  const FormatArgImpl args[] = {FormatArgImpl(ia[0]), FormatArgImpl(ia[1]),
-                                FormatArgImpl(ia[2]), FormatArgImpl(ia[3])};
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
-  const Expectation kExpect[] = {
-    {__LINE__, "d",          2, &args[0], no, no, 2},
-    {__LINE__, "4d",         2, &args[0],  4, no, 2},
-    {__LINE__, ".5d",        2, &args[0], no,  5, 2},
-    {__LINE__, "4.5d",       2, &args[0],  4,  5, 2},
-    {__LINE__, "*d",         2, &args[1], 10, no, 3},
-    {__LINE__, ".*d",        2, &args[1], no, 10, 3},
-    {__LINE__, "*.*d",       2, &args[2], 10, 20, 4},
-    {__LINE__, "1$d",        2, &args[0], no, no, 0},
-    {__LINE__, "2$d",        2, &args[1], no, no, 0},
-    {__LINE__, "3$d",        2, &args[2], no, no, 0},
-    {__LINE__, "4$d",        2, &args[3], no, no, 0},
-    {__LINE__, "2$*1$d",     2, &args[1], 10, no, 0},
-    {__LINE__, "2$*2$d",     2, &args[1], 20, no, 0},
-    {__LINE__, "2$*3$d",     2, &args[1], 30, no, 0},
-    {__LINE__, "2$.*1$d",    2, &args[1], no, 10, 0},
-    {__LINE__, "2$.*2$d",    2, &args[1], no, 20, 0},
-    {__LINE__, "2$.*3$d",    2, &args[1], no, 30, 0},
-    {__LINE__, "2$*3$.*1$d", 2, &args[1], 30, 10, 0},
-    {__LINE__, "2$*2$.*2$d", 2, &args[1], 20, 20, 0},
-    {__LINE__, "2$*1$.*3$d", 2, &args[1], 10, 30, 0},
-    {__LINE__, "2$*3$.*1$d", 2, &args[1], 30, 10, 0},
-    {__LINE__, "1$*d",       0},  // indexed, then positional
-    {__LINE__, "*2$d",       0},  // positional, then indexed
-    {__LINE__, "6$d",        1},  // arg position out of bounds
-    {__LINE__, "1$6$d",      0},  // width position incorrectly specified
-    {__LINE__, "1$.6$d",     0},  // precision position incorrectly specified
-    {__LINE__, "1$*6$d",     1},  // width position out of bounds
-    {__LINE__, "1$.*6$d",    1},  // precision position out of bounds
-  };
-#pragma GCC diagnostic pop
-  for (const Expectation &e : kExpect) {
-    SCOPED_TRACE(e.line);
-    SCOPED_TRACE(e.fmt);
-    UnboundConversion props;
-    BoundConversion bound;
-    int ok_phases = 0;
-    int next = 0;
-    if (Extract(e.fmt, &props, &next)) {
-      ++ok_phases;
-      if (BindWithPack(&props, args, &bound)) {
-        ++ok_phases;
-      }
-    }
-    EXPECT_EQ(e.ok_phases, ok_phases);
-    if (e.ok_phases < 2) continue;
-    if (e.arg != nullptr) {
-      EXPECT_EQ(e.arg, bound.arg());
-    }
-    EXPECT_EQ(e.width, bound.width());
-    EXPECT_EQ(e.precision, bound.precision());
-  }
-}
-
-TEST_F(FormatBindTest, WidthUnderflowRegression) {
-  UnboundConversion props;
-  BoundConversion bound;
-  int next = 0;
-  const int args_i[] = {std::numeric_limits<int>::min(), 17};
-  const FormatArgImpl args[] = {FormatArgImpl(args_i[0]),
-                                FormatArgImpl(args_i[1])};
-  ASSERT_TRUE(Extract("*d", &props, &next));
-  ASSERT_TRUE(BindWithPack(&props, args, &bound));
-
-  EXPECT_EQ(bound.width(), std::numeric_limits<int>::max());
-  EXPECT_EQ(bound.arg(), args + 1);
-}
-
-TEST_F(FormatBindTest, FormatPack) {
-  struct Expectation {
-    int line;
-    const char *fmt;
-    const char *summary;
-  };
-  const int ia[] = { 10, 20, 30, 40, -10 };
-  const FormatArgImpl args[] = {FormatArgImpl(ia[0]), FormatArgImpl(ia[1]),
-                                FormatArgImpl(ia[2]), FormatArgImpl(ia[3]),
-                                FormatArgImpl(ia[4])};
-  const Expectation kExpect[] = {
-      {__LINE__, "a%4db%dc", "a{10:4d}b{20:d}c"},
-      {__LINE__, "a%.4db%dc", "a{10:.4d}b{20:d}c"},
-      {__LINE__, "a%4.5db%dc", "a{10:4.5d}b{20:d}c"},
-      {__LINE__, "a%db%4.5dc", "a{10:d}b{20:4.5d}c"},
-      {__LINE__, "a%db%*.*dc", "a{10:d}b{40:20.30d}c"},
-      {__LINE__, "a%.*fb", "a{20:.10f}b"},
-      {__LINE__, "a%1$db%2$*3$.*4$dc", "a{10:d}b{20:30.40d}c"},
-      {__LINE__, "a%4$db%3$*2$.*1$dc", "a{40:d}b{30:20.10d}c"},
-      {__LINE__, "a%04ldb", "a{10:04d}b"},
-      {__LINE__, "a%-#04lldb", "a{10:-#04d}b"},
-      {__LINE__, "a%1$*5$db", "a{10:-10d}b"},
-      {__LINE__, "a%1$.*5$db", "a{10:d}b"},
-  };
-  for (const Expectation &e : kExpect) {
-    absl::string_view fmt = e.fmt;
-    SCOPED_TRACE(e.line);
-    SCOPED_TRACE(e.fmt);
-    UntypedFormatSpecImpl format(fmt);
-    EXPECT_EQ(e.summary,
-              str_format_internal::Summarize(format, absl::MakeSpan(args)))
-        << "line:" << e.line;
-  }
-}
-
-}  // namespace
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/checker.h b/third_party/abseil/absl/strings/internal/str_format/checker.h
deleted file mode 100644
index 2a2601e..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/checker.h
+++ /dev/null
@@ -1,333 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_CHECKER_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_CHECKER_H_
-
-#include "absl/base/attributes.h"
-#include "absl/strings/internal/str_format/arg.h"
-#include "absl/strings/internal/str_format/extension.h"
-
-// Compile time check support for entry points.
-
-#ifndef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-#if ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__)
-#define ABSL_INTERNAL_ENABLE_FORMAT_CHECKER 1
-#endif  // ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__)
-#endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-constexpr bool AllOf() { return true; }
-
-template <typename... T>
-constexpr bool AllOf(bool b, T... t) {
-  return b && AllOf(t...);
-}
-
-#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-constexpr bool ContainsChar(const char* chars, char c) {
-  return *chars == c || (*chars && ContainsChar(chars + 1, c));
-}
-
-// A constexpr compatible list of Convs.
-struct ConvList {
-  const FormatConversionCharSet* array;
-  int count;
-
-  // We do the bound check here to avoid having to do it on the callers.
-  // Returning an empty FormatConversionCharSet has the same effect as
-  // short circuiting because it will never match any conversion.
-  constexpr FormatConversionCharSet operator[](int i) const {
-    return i < count ? array[i] : FormatConversionCharSet{};
-  }
-
-  constexpr ConvList without_front() const {
-    return count != 0 ? ConvList{array + 1, count - 1} : *this;
-  }
-};
-
-template <size_t count>
-struct ConvListT {
-  // Make sure the array has size > 0.
-  FormatConversionCharSet list[count ? count : 1];
-};
-
-constexpr char GetChar(string_view str, size_t index) {
-  return index < str.size() ? str[index] : char{};
-}
-
-constexpr string_view ConsumeFront(string_view str, size_t len = 1) {
-  return len <= str.size() ? string_view(str.data() + len, str.size() - len)
-                           : string_view();
-}
-
-constexpr string_view ConsumeAnyOf(string_view format, const char* chars) {
-  return ContainsChar(chars, GetChar(format, 0))
-             ? ConsumeAnyOf(ConsumeFront(format), chars)
-             : format;
-}
-
-constexpr bool IsDigit(char c) { return c >= '0' && c <= '9'; }
-
-// Helper class for the ParseDigits function.
-// It encapsulates the two return values we need there.
-struct Integer {
-  string_view format;
-  int value;
-
-  // If the next character is a '$', consume it.
-  // Otherwise, make `this` an invalid positional argument.
-  constexpr Integer ConsumePositionalDollar() const {
-    return GetChar(format, 0) == '$' ? Integer{ConsumeFront(format), value}
-                                     : Integer{format, 0};
-  }
-};
-
-constexpr Integer ParseDigits(string_view format, int value = 0) {
-  return IsDigit(GetChar(format, 0))
-             ? ParseDigits(ConsumeFront(format),
-                           10 * value + GetChar(format, 0) - '0')
-             : Integer{format, value};
-}
-
-// Parse digits for a positional argument.
-// The parsing also consumes the '$'.
-constexpr Integer ParsePositional(string_view format) {
-  return ParseDigits(format).ConsumePositionalDollar();
-}
-
-// Parses a single conversion specifier.
-// See ConvParser::Run() for post conditions.
-class ConvParser {
-  constexpr ConvParser SetFormat(string_view format) const {
-    return ConvParser(format, args_, error_, arg_position_, is_positional_);
-  }
-
-  constexpr ConvParser SetArgs(ConvList args) const {
-    return ConvParser(format_, args, error_, arg_position_, is_positional_);
-  }
-
-  constexpr ConvParser SetError(bool error) const {
-    return ConvParser(format_, args_, error_ || error, arg_position_,
-                      is_positional_);
-  }
-
-  constexpr ConvParser SetArgPosition(int arg_position) const {
-    return ConvParser(format_, args_, error_, arg_position, is_positional_);
-  }
-
-  // Consumes the next arg and verifies that it matches `conv`.
-  // `error_` is set if there is no next arg or if it doesn't match `conv`.
-  constexpr ConvParser ConsumeNextArg(char conv) const {
-    return SetArgs(args_.without_front()).SetError(!Contains(args_[0], conv));
-  }
-
-  // Verify that positional argument `i.value` matches `conv`.
-  // `error_` is set if `i.value` is not a valid argument or if it doesn't
-  // match.
-  constexpr ConvParser VerifyPositional(Integer i, char conv) const {
-    return SetFormat(i.format).SetError(!Contains(args_[i.value - 1], conv));
-  }
-
-  // Parse the position of the arg and store it in `arg_position_`.
-  constexpr ConvParser ParseArgPosition(Integer arg) const {
-    return SetFormat(arg.format).SetArgPosition(arg.value);
-  }
-
-  // Consume the flags.
-  constexpr ConvParser ParseFlags() const {
-    return SetFormat(ConsumeAnyOf(format_, "-+ #0"));
-  }
-
-  // Consume the width.
-  // If it is '*', we verify that it matches `args_`. `error_` is set if it
-  // doesn't match.
-  constexpr ConvParser ParseWidth() const {
-    return IsDigit(GetChar(format_, 0))
-               ? SetFormat(ParseDigits(format_).format)
-               : GetChar(format_, 0) == '*'
-                     ? is_positional_
-                           ? VerifyPositional(
-                                 ParsePositional(ConsumeFront(format_)), '*')
-                           : SetFormat(ConsumeFront(format_))
-                                 .ConsumeNextArg('*')
-                     : *this;
-  }
-
-  // Consume the precision.
-  // If it is '*', we verify that it matches `args_`. `error_` is set if it
-  // doesn't match.
-  constexpr ConvParser ParsePrecision() const {
-    return GetChar(format_, 0) != '.'
-               ? *this
-               : GetChar(format_, 1) == '*'
-                     ? is_positional_
-                           ? VerifyPositional(
-                                 ParsePositional(ConsumeFront(format_, 2)), '*')
-                           : SetFormat(ConsumeFront(format_, 2))
-                                 .ConsumeNextArg('*')
-                     : SetFormat(ParseDigits(ConsumeFront(format_)).format);
-  }
-
-  // Consume the length characters.
-  constexpr ConvParser ParseLength() const {
-    return SetFormat(ConsumeAnyOf(format_, "lLhjztq"));
-  }
-
-  // Consume the conversion character and verify that it matches `args_`.
-  // `error_` is set if it doesn't match.
-  constexpr ConvParser ParseConversion() const {
-    return is_positional_
-               ? VerifyPositional({ConsumeFront(format_), arg_position_},
-                                  GetChar(format_, 0))
-               : ConsumeNextArg(GetChar(format_, 0))
-                     .SetFormat(ConsumeFront(format_));
-  }
-
-  constexpr ConvParser(string_view format, ConvList args, bool error,
-                       int arg_position, bool is_positional)
-      : format_(format),
-        args_(args),
-        error_(error),
-        arg_position_(arg_position),
-        is_positional_(is_positional) {}
-
- public:
-  constexpr ConvParser(string_view format, ConvList args, bool is_positional)
-      : format_(format),
-        args_(args),
-        error_(false),
-        arg_position_(0),
-        is_positional_(is_positional) {}
-
-  // Consume the whole conversion specifier.
-  // `format()` will be set to the character after the conversion character.
-  // `error()` will be set if any of the arguments do not match.
-  constexpr ConvParser Run() const {
-    return (is_positional_ ? ParseArgPosition(ParsePositional(format_)) : *this)
-        .ParseFlags()
-        .ParseWidth()
-        .ParsePrecision()
-        .ParseLength()
-        .ParseConversion();
-  }
-
-  constexpr string_view format() const { return format_; }
-  constexpr ConvList args() const { return args_; }
-  constexpr bool error() const { return error_; }
-  constexpr bool is_positional() const { return is_positional_; }
-
- private:
-  string_view format_;
-  // Current list of arguments. If we are not in positional mode we will consume
-  // from the front.
-  ConvList args_;
-  bool error_;
-  // Holds the argument position of the conversion character, if we are in
-  // positional mode. Otherwise, it is unspecified.
-  int arg_position_;
-  // Whether we are in positional mode.
-  // It changes the behavior of '*' and where to find the converted argument.
-  bool is_positional_;
-};
-
-// Parses a whole format expression.
-// See FormatParser::Run().
-class FormatParser {
-  static constexpr bool FoundPercent(string_view format) {
-    return format.empty() ||
-           (GetChar(format, 0) == '%' && GetChar(format, 1) != '%');
-  }
-
-  // We use an inner function to increase the recursion limit.
-  // The inner function consumes up to `limit` characters on every run.
-  // This increases the limit from 512 to ~512*limit.
-  static constexpr string_view ConsumeNonPercentInner(string_view format,
-                                                      int limit = 20) {
-    return FoundPercent(format) || !limit
-               ? format
-               : ConsumeNonPercentInner(
-                     ConsumeFront(format, GetChar(format, 0) == '%' &&
-                                                  GetChar(format, 1) == '%'
-                                              ? 2
-                                              : 1),
-                     limit - 1);
-  }
-
-  // Consume characters until the next conversion spec %.
-  // It skips %%.
-  static constexpr string_view ConsumeNonPercent(string_view format) {
-    return FoundPercent(format)
-               ? format
-               : ConsumeNonPercent(ConsumeNonPercentInner(format));
-  }
-
-  static constexpr bool IsPositional(string_view format) {
-    return IsDigit(GetChar(format, 0)) ? IsPositional(ConsumeFront(format))
-                                       : GetChar(format, 0) == '$';
-  }
-
-  constexpr bool RunImpl(bool is_positional) const {
-    // In non-positional mode we require all arguments to be consumed.
-    // In positional mode just reaching the end of the format without errors is
-    // enough.
-    return (format_.empty() && (is_positional || args_.count == 0)) ||
-           (!format_.empty() &&
-            ValidateArg(
-                ConvParser(ConsumeFront(format_), args_, is_positional).Run()));
-  }
-
-  constexpr bool ValidateArg(ConvParser conv) const {
-    return !conv.error() && FormatParser(conv.format(), conv.args())
-                                .RunImpl(conv.is_positional());
-  }
-
- public:
-  constexpr FormatParser(string_view format, ConvList args)
-      : format_(ConsumeNonPercent(format)), args_(args) {}
-
-  // Runs the parser for `format` and `args`.
-  // It verifies that the format is valid and that all conversion specifiers
-  // match the arguments passed.
-  // In non-positional mode it also verfies that all arguments are consumed.
-  constexpr bool Run() const {
-    return RunImpl(!format_.empty() && IsPositional(ConsumeFront(format_)));
-  }
-
- private:
-  string_view format_;
-  // Current list of arguments.
-  // If we are not in positional mode we will consume from the front and will
-  // have to be empty in the end.
-  ConvList args_;
-};
-
-template <FormatConversionCharSet... C>
-constexpr bool ValidFormatImpl(string_view format) {
-  return FormatParser(format,
-                      {ConvListT<sizeof...(C)>{{C...}}.list, sizeof...(C)})
-      .Run();
-}
-
-#endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_CHECKER_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/checker_test.cc b/third_party/abseil/absl/strings/internal/str_format/checker_test.cc
deleted file mode 100644
index 7c70f47..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/checker_test.cc
+++ /dev/null
@@ -1,170 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/str_format.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-namespace {
-
-std::string ConvToString(FormatConversionCharSet conv) {
-  std::string out;
-#define CONV_SET_CASE(c)                                    \
-  if (Contains(conv, FormatConversionCharSetInternal::c)) { \
-    out += #c;                                              \
-  }
-  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(CONV_SET_CASE, )
-#undef CONV_SET_CASE
-  if (Contains(conv, FormatConversionCharSetInternal::kStar)) {
-    out += "*";
-  }
-  return out;
-}
-
-TEST(StrFormatChecker, ArgumentToConv) {
-  FormatConversionCharSet conv = ArgumentToConv<std::string>();
-  EXPECT_EQ(ConvToString(conv), "s");
-
-  conv = ArgumentToConv<const char*>();
-  EXPECT_EQ(ConvToString(conv), "sp");
-
-  conv = ArgumentToConv<double>();
-  EXPECT_EQ(ConvToString(conv), "fFeEgGaA");
-
-  conv = ArgumentToConv<int>();
-  EXPECT_EQ(ConvToString(conv), "cdiouxXfFeEgGaA*");
-
-  conv = ArgumentToConv<std::string*>();
-  EXPECT_EQ(ConvToString(conv), "p");
-}
-
-#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-struct Case {
-  bool result;
-  const char* format;
-};
-
-template <typename... Args>
-constexpr Case ValidFormat(const char* format) {
-  return {ValidFormatImpl<ArgumentToConv<Args>()...>(format), format};
-}
-
-TEST(StrFormatChecker, ValidFormat) {
-  // We want to make sure these expressions are constexpr and they have the
-  // expected value.
-  // If they are not constexpr the attribute will just ignore them and not give
-  // a compile time error.
-  enum e {};
-  enum class e2 {};
-  constexpr Case trues[] = {
-      ValidFormat<>("abc"),  //
-
-      ValidFormat<e>("%d"),                             //
-      ValidFormat<e2>("%d"),                            //
-      ValidFormat<int>("%% %d"),                        //
-      ValidFormat<int>("%ld"),                          //
-      ValidFormat<int>("%lld"),                         //
-      ValidFormat<std::string>("%s"),                   //
-      ValidFormat<std::string>("%10s"),                 //
-      ValidFormat<int>("%.10x"),                        //
-      ValidFormat<int, int>("%*.3x"),                   //
-      ValidFormat<int>("%1.d"),                         //
-      ValidFormat<int>("%.d"),                          //
-      ValidFormat<int, double>("%d %g"),                //
-      ValidFormat<int, std::string>("%*s"),             //
-      ValidFormat<int, double>("%.*f"),                 //
-      ValidFormat<void (*)(), volatile int*>("%p %p"),  //
-      ValidFormat<string_view, const char*, double, void*>(
-          "string_view=%s const char*=%s double=%f void*=%p)"),
-
-      ValidFormat<int>("%% %1$d"),               //
-      ValidFormat<int>("%1$ld"),                 //
-      ValidFormat<int>("%1$lld"),                //
-      ValidFormat<std::string>("%1$s"),          //
-      ValidFormat<std::string>("%1$10s"),        //
-      ValidFormat<int>("%1$.10x"),               //
-      ValidFormat<int>("%1$*1$.*1$d"),           //
-      ValidFormat<int, int>("%1$*2$.3x"),        //
-      ValidFormat<int>("%1$1.d"),                //
-      ValidFormat<int>("%1$.d"),                 //
-      ValidFormat<double, int>("%2$d %1$g"),     //
-      ValidFormat<int, std::string>("%2$*1$s"),  //
-      ValidFormat<int, double>("%2$.*1$f"),      //
-      ValidFormat<void*, string_view, const char*, double>(
-          "string_view=%2$s const char*=%3$s double=%4$f void*=%1$p "
-          "repeat=%3$s)")};
-
-  for (Case c : trues) {
-    EXPECT_TRUE(c.result) << c.format;
-  }
-
-  constexpr Case falses[] = {
-      ValidFormat<int>(""),  //
-
-      ValidFormat<e>("%s"),                  //
-      ValidFormat<e2>("%s"),                 //
-      ValidFormat<>("%s"),                   //
-      ValidFormat<>("%r"),                   //
-      ValidFormat<int>("%s"),                //
-      ValidFormat<int>("%.1.d"),             //
-      ValidFormat<int>("%*1d"),              //
-      ValidFormat<int>("%1-d"),              //
-      ValidFormat<std::string, int>("%*s"),  //
-      ValidFormat<int>("%*d"),               //
-      ValidFormat<std::string>("%p"),        //
-      ValidFormat<int (*)(int)>("%d"),       //
-
-      ValidFormat<>("%3$d"),                     //
-      ValidFormat<>("%1$r"),                     //
-      ValidFormat<int>("%1$s"),                  //
-      ValidFormat<int>("%1$.1.d"),               //
-      ValidFormat<int>("%1$*2$1d"),              //
-      ValidFormat<int>("%1$1-d"),                //
-      ValidFormat<std::string, int>("%2$*1$s"),  //
-      ValidFormat<std::string>("%1$p"),
-
-      ValidFormat<int, int>("%d %2$d"),  //
-  };
-
-  for (Case c : falses) {
-    EXPECT_FALSE(c.result) << c.format;
-  }
-}
-
-TEST(StrFormatChecker, LongFormat) {
-#define CHARS_X_40 "1234567890123456789012345678901234567890"
-#define CHARS_X_400                                                            \
-  CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 CHARS_X_40 \
-      CHARS_X_40 CHARS_X_40 CHARS_X_40
-#define CHARS_X_4000                                                      \
-  CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400 \
-      CHARS_X_400 CHARS_X_400 CHARS_X_400 CHARS_X_400
-  constexpr char long_format[] =
-      CHARS_X_4000 "%d" CHARS_X_4000 "%s" CHARS_X_4000;
-  constexpr bool is_valid = ValidFormat<int, std::string>(long_format).result;
-  EXPECT_TRUE(is_valid);
-}
-
-#endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-
-}  // namespace
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/convert_test.cc b/third_party/abseil/absl/strings/internal/str_format/convert_test.cc
deleted file mode 100644
index 375db0a..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/convert_test.cc
+++ /dev/null
@@ -1,1242 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <errno.h>
-#include <stdarg.h>
-#include <stdio.h>
-
-#include <cctype>
-#include <cmath>
-#include <limits>
-#include <string>
-#include <thread>  // NOLINT
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/internal/str_format/bind.h"
-#include "absl/strings/match.h"
-#include "absl/types/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-namespace {
-
-struct NativePrintfTraits {
-  bool hex_float_has_glibc_rounding;
-  bool hex_float_prefers_denormal_repr;
-  bool hex_float_uses_minimal_precision_when_not_specified;
-  bool hex_float_optimizes_leading_digit_bit_count;
-};
-
-template <typename T, size_t N>
-size_t ArraySize(T (&)[N]) {
-  return N;
-}
-
-std::string LengthModFor(float) { return ""; }
-std::string LengthModFor(double) { return ""; }
-std::string LengthModFor(long double) { return "L"; }
-std::string LengthModFor(char) { return "hh"; }
-std::string LengthModFor(signed char) { return "hh"; }
-std::string LengthModFor(unsigned char) { return "hh"; }
-std::string LengthModFor(short) { return "h"; }           // NOLINT
-std::string LengthModFor(unsigned short) { return "h"; }  // NOLINT
-std::string LengthModFor(int) { return ""; }
-std::string LengthModFor(unsigned) { return ""; }
-std::string LengthModFor(long) { return "l"; }                 // NOLINT
-std::string LengthModFor(unsigned long) { return "l"; }        // NOLINT
-std::string LengthModFor(long long) { return "ll"; }           // NOLINT
-std::string LengthModFor(unsigned long long) { return "ll"; }  // NOLINT
-
-std::string EscCharImpl(int v) {
-  if (std::isprint(static_cast<unsigned char>(v))) {
-    return std::string(1, static_cast<char>(v));
-  }
-  char buf[64];
-  int n = snprintf(buf, sizeof(buf), "\\%#.2x",
-                   static_cast<unsigned>(v & 0xff));
-  assert(n > 0 && n < sizeof(buf));
-  return std::string(buf, n);
-}
-
-std::string Esc(char v) { return EscCharImpl(v); }
-std::string Esc(signed char v) { return EscCharImpl(v); }
-std::string Esc(unsigned char v) { return EscCharImpl(v); }
-
-template <typename T>
-std::string Esc(const T &v) {
-  std::ostringstream oss;
-  oss << v;
-  return oss.str();
-}
-
-void StrAppendV(std::string *dst, const char *format, va_list ap) {
-  // First try with a small fixed size buffer
-  static const int kSpaceLength = 1024;
-  char space[kSpaceLength];
-
-  // It's possible for methods that use a va_list to invalidate
-  // the data in it upon use.  The fix is to make a copy
-  // of the structure before using it and use that copy instead.
-  va_list backup_ap;
-  va_copy(backup_ap, ap);
-  int result = vsnprintf(space, kSpaceLength, format, backup_ap);
-  va_end(backup_ap);
-  if (result < kSpaceLength) {
-    if (result >= 0) {
-      // Normal case -- everything fit.
-      dst->append(space, result);
-      return;
-    }
-    if (result < 0) {
-      // Just an error.
-      return;
-    }
-  }
-
-  // Increase the buffer size to the size requested by vsnprintf,
-  // plus one for the closing \0.
-  int length = result + 1;
-  char *buf = new char[length];
-
-  // Restore the va_list before we use it again
-  va_copy(backup_ap, ap);
-  result = vsnprintf(buf, length, format, backup_ap);
-  va_end(backup_ap);
-
-  if (result >= 0 && result < length) {
-    // It fit
-    dst->append(buf, result);
-  }
-  delete[] buf;
-}
-
-void StrAppend(std::string *out, const char *format, ...) {
-  va_list ap;
-  va_start(ap, format);
-  StrAppendV(out, format, ap);
-  va_end(ap);
-}
-
-std::string StrPrint(const char *format, ...) {
-  va_list ap;
-  va_start(ap, format);
-  std::string result;
-  StrAppendV(&result, format, ap);
-  va_end(ap);
-  return result;
-}
-
-NativePrintfTraits VerifyNativeImplementationImpl() {
-  NativePrintfTraits result;
-
-  // >>> hex_float_has_glibc_rounding. To have glibc's rounding behavior we need
-  // to meet three requirements:
-  //
-  //   - The threshold for rounding up is 8 (for e.g. MSVC uses 9).
-  //   - If the digits lower than than the 8 are non-zero then we round up.
-  //   - If the digits lower than the 8 are all zero then we round toward even.
-  //
-  // The numbers below represent all the cases covering {below,at,above} the
-  // threshold (8) with both {zero,non-zero} lower bits and both {even,odd}
-  // preceding digits.
-  const double d0079 = 65657.0;  // 0x1.0079p+16
-  const double d0179 = 65913.0;  // 0x1.0179p+16
-  const double d0080 = 65664.0;  // 0x1.0080p+16
-  const double d0180 = 65920.0;  // 0x1.0180p+16
-  const double d0081 = 65665.0;  // 0x1.0081p+16
-  const double d0181 = 65921.0;  // 0x1.0181p+16
-  result.hex_float_has_glibc_rounding =
-      StartsWith(StrPrint("%.2a", d0079), "0x1.00") &&
-      StartsWith(StrPrint("%.2a", d0179), "0x1.01") &&
-      StartsWith(StrPrint("%.2a", d0080), "0x1.00") &&
-      StartsWith(StrPrint("%.2a", d0180), "0x1.02") &&
-      StartsWith(StrPrint("%.2a", d0081), "0x1.01") &&
-      StartsWith(StrPrint("%.2a", d0181), "0x1.02");
-
-  // >>> hex_float_prefers_denormal_repr. Formatting `denormal` on glibc yields
-  // "0x0.0000000000001p-1022", whereas on std libs that don't use denormal
-  // representation it would either be 0x1p-1074 or 0x1.0000000000000-1074.
-  const double denormal = std::numeric_limits<double>::denorm_min();
-  result.hex_float_prefers_denormal_repr =
-      StartsWith(StrPrint("%a", denormal), "0x0.0000000000001");
-
-  // >>> hex_float_uses_minimal_precision_when_not_specified. Some (non-glibc)
-  // libs will format the following as "0x1.0079000000000p+16".
-  result.hex_float_uses_minimal_precision_when_not_specified =
-      (StrPrint("%a", d0079) == "0x1.0079p+16");
-
-  // >>> hex_float_optimizes_leading_digit_bit_count. The number 1.5, when
-  // formatted by glibc should yield "0x1.8p+0" for `double` and "0xcp-3" for
-  // `long double`, i.e., number of bits in the leading digit is adapted to the
-  // number of bits in the mantissa.
-  const double d_15 = 1.5;
-  const long double ld_15 = 1.5;
-  result.hex_float_optimizes_leading_digit_bit_count =
-      StartsWith(StrPrint("%a", d_15), "0x1.8") &&
-      StartsWith(StrPrint("%La", ld_15), "0xc");
-
-  return result;
-}
-
-const NativePrintfTraits &VerifyNativeImplementation() {
-  static NativePrintfTraits native_traits = VerifyNativeImplementationImpl();
-  return native_traits;
-}
-
-class FormatConvertTest : public ::testing::Test { };
-
-template <typename T>
-void TestStringConvert(const T& str) {
-  const FormatArgImpl args[] = {FormatArgImpl(str)};
-  struct Expectation {
-    const char *out;
-    const char *fmt;
-  };
-  const Expectation kExpect[] = {
-    {"hello",  "%1$s"      },
-    {"",       "%1$.s"     },
-    {"",       "%1$.0s"    },
-    {"h",      "%1$.1s"    },
-    {"he",     "%1$.2s"    },
-    {"hello",  "%1$.10s"   },
-    {" hello", "%1$6s"     },
-    {"   he",  "%1$5.2s"   },
-    {"he   ",  "%1$-5.2s"  },
-    {"hello ", "%1$-6.10s" },
-  };
-  for (const Expectation &e : kExpect) {
-    UntypedFormatSpecImpl format(e.fmt);
-    EXPECT_EQ(e.out, FormatPack(format, absl::MakeSpan(args)));
-  }
-}
-
-TEST_F(FormatConvertTest, BasicString) {
-  TestStringConvert("hello");  // As char array.
-  TestStringConvert(static_cast<const char*>("hello"));
-  TestStringConvert(std::string("hello"));
-  TestStringConvert(string_view("hello"));
-}
-
-TEST_F(FormatConvertTest, NullString) {
-  const char* p = nullptr;
-  UntypedFormatSpecImpl format("%s");
-  EXPECT_EQ("", FormatPack(format, {FormatArgImpl(p)}));
-}
-
-TEST_F(FormatConvertTest, StringPrecision) {
-  // We cap at the precision.
-  char c = 'a';
-  const char* p = &c;
-  UntypedFormatSpecImpl format("%.1s");
-  EXPECT_EQ("a", FormatPack(format, {FormatArgImpl(p)}));
-
-  // We cap at the NUL-terminator.
-  p = "ABC";
-  UntypedFormatSpecImpl format2("%.10s");
-  EXPECT_EQ("ABC", FormatPack(format2, {FormatArgImpl(p)}));
-}
-
-// Pointer formatting is implementation defined. This checks that the argument
-// can be matched to `ptr`.
-MATCHER_P(MatchesPointerString, ptr, "") {
-  if (ptr == nullptr && arg == "(nil)") {
-    return true;
-  }
-  void* parsed = nullptr;
-  if (sscanf(arg.c_str(), "%p", &parsed) != 1) {
-    ABSL_RAW_LOG(FATAL, "Could not parse %s", arg.c_str());
-  }
-  return ptr == parsed;
-}
-
-TEST_F(FormatConvertTest, Pointer) {
-  static int x = 0;
-  const int *xp = &x;
-  char c = 'h';
-  char *mcp = &c;
-  const char *cp = "hi";
-  const char *cnil = nullptr;
-  const int *inil = nullptr;
-  using VoidF = void (*)();
-  VoidF fp = [] {}, fnil = nullptr;
-  volatile char vc;
-  volatile char *vcp = &vc;
-  volatile char *vcnil = nullptr;
-  const FormatArgImpl args_array[] = {
-      FormatArgImpl(xp),   FormatArgImpl(cp),  FormatArgImpl(inil),
-      FormatArgImpl(cnil), FormatArgImpl(mcp), FormatArgImpl(fp),
-      FormatArgImpl(fnil), FormatArgImpl(vcp), FormatArgImpl(vcnil),
-  };
-  auto args = absl::MakeConstSpan(args_array);
-
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%20p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%.1p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%.20p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%30.20p"), args),
-              MatchesPointerString(&x));
-
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%-p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%-20p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%-.1p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%.20p"), args),
-              MatchesPointerString(&x));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%-30.20p"), args),
-              MatchesPointerString(&x));
-
-  // const char*
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%2$p"), args),
-              MatchesPointerString(cp));
-  // null const int*
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%3$p"), args),
-              MatchesPointerString(nullptr));
-  // null const char*
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%4$p"), args),
-              MatchesPointerString(nullptr));
-  // nonconst char*
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%5$p"), args),
-              MatchesPointerString(mcp));
-
-  // function pointers
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%6$p"), args),
-              MatchesPointerString(reinterpret_cast<const void*>(fp)));
-  EXPECT_THAT(
-      FormatPack(UntypedFormatSpecImpl("%8$p"), args),
-      MatchesPointerString(reinterpret_cast<volatile const void *>(vcp)));
-
-  // null function pointers
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%7$p"), args),
-              MatchesPointerString(nullptr));
-  EXPECT_THAT(FormatPack(UntypedFormatSpecImpl("%9$p"), args),
-              MatchesPointerString(nullptr));
-}
-
-struct Cardinal {
-  enum Pos { k1 = 1, k2 = 2, k3 = 3 };
-  enum Neg { kM1 = -1, kM2 = -2, kM3 = -3 };
-};
-
-TEST_F(FormatConvertTest, Enum) {
-  const Cardinal::Pos k3 = Cardinal::k3;
-  const Cardinal::Neg km3 = Cardinal::kM3;
-  const FormatArgImpl args[] = {FormatArgImpl(k3), FormatArgImpl(km3)};
-  UntypedFormatSpecImpl format("%1$d");
-  UntypedFormatSpecImpl format2("%2$d");
-  EXPECT_EQ("3", FormatPack(format, absl::MakeSpan(args)));
-  EXPECT_EQ("-3", FormatPack(format2, absl::MakeSpan(args)));
-}
-
-template <typename T>
-class TypedFormatConvertTest : public FormatConvertTest { };
-
-TYPED_TEST_SUITE_P(TypedFormatConvertTest);
-
-std::vector<std::string> AllFlagCombinations() {
-  const char kFlags[] = {'-', '#', '0', '+', ' '};
-  std::vector<std::string> result;
-  for (size_t fsi = 0; fsi < (1ull << ArraySize(kFlags)); ++fsi) {
-    std::string flag_set;
-    for (size_t fi = 0; fi < ArraySize(kFlags); ++fi)
-      if (fsi & (1ull << fi))
-        flag_set += kFlags[fi];
-    result.push_back(flag_set);
-  }
-  return result;
-}
-
-TYPED_TEST_P(TypedFormatConvertTest, AllIntsWithFlags) {
-  typedef TypeParam T;
-  typedef typename std::make_unsigned<T>::type UnsignedT;
-  using remove_volatile_t = typename std::remove_volatile<T>::type;
-  const T kMin = std::numeric_limits<remove_volatile_t>::min();
-  const T kMax = std::numeric_limits<remove_volatile_t>::max();
-  const T kVals[] = {
-      remove_volatile_t(1),
-      remove_volatile_t(2),
-      remove_volatile_t(3),
-      remove_volatile_t(123),
-      remove_volatile_t(-1),
-      remove_volatile_t(-2),
-      remove_volatile_t(-3),
-      remove_volatile_t(-123),
-      remove_volatile_t(0),
-      kMax - remove_volatile_t(1),
-      kMax,
-      kMin + remove_volatile_t(1),
-      kMin,
-  };
-  const char kConvChars[] = {'d', 'i', 'u', 'o', 'x', 'X'};
-  const std::string kWid[] = {"", "4", "10"};
-  const std::string kPrec[] = {"", ".", ".0", ".4", ".10"};
-
-  const std::vector<std::string> flag_sets = AllFlagCombinations();
-
-  for (size_t vi = 0; vi < ArraySize(kVals); ++vi) {
-    const T val = kVals[vi];
-    SCOPED_TRACE(Esc(val));
-    const FormatArgImpl args[] = {FormatArgImpl(val)};
-    for (size_t ci = 0; ci < ArraySize(kConvChars); ++ci) {
-      const char conv_char = kConvChars[ci];
-      for (size_t fsi = 0; fsi < flag_sets.size(); ++fsi) {
-        const std::string &flag_set = flag_sets[fsi];
-        for (size_t wi = 0; wi < ArraySize(kWid); ++wi) {
-          const std::string &wid = kWid[wi];
-          for (size_t pi = 0; pi < ArraySize(kPrec); ++pi) {
-            const std::string &prec = kPrec[pi];
-
-            const bool is_signed_conv = (conv_char == 'd' || conv_char == 'i');
-            const bool is_unsigned_to_signed =
-                !std::is_signed<T>::value && is_signed_conv;
-            // Don't consider sign-related flags '+' and ' ' when doing
-            // unsigned to signed conversions.
-            if (is_unsigned_to_signed &&
-                flag_set.find_first_of("+ ") != std::string::npos) {
-              continue;
-            }
-
-            std::string new_fmt("%");
-            new_fmt += flag_set;
-            new_fmt += wid;
-            new_fmt += prec;
-            // old and new always agree up to here.
-            std::string old_fmt = new_fmt;
-            new_fmt += conv_char;
-            std::string old_result;
-            if (is_unsigned_to_signed) {
-              // don't expect agreement on unsigned formatted as signed,
-              // as printf can't do that conversion properly. For those
-              // cases, we do expect agreement with printf with a "%u"
-              // and the unsigned equivalent of 'val'.
-              UnsignedT uval = val;
-              old_fmt += LengthModFor(uval);
-              old_fmt += "u";
-              old_result = StrPrint(old_fmt.c_str(), uval);
-            } else {
-              old_fmt += LengthModFor(val);
-              old_fmt += conv_char;
-              old_result = StrPrint(old_fmt.c_str(), val);
-            }
-
-            SCOPED_TRACE(std::string() + " old_fmt: \"" + old_fmt +
-                         "\"'"
-                         " new_fmt: \"" +
-                         new_fmt + "\"");
-            UntypedFormatSpecImpl format(new_fmt);
-            EXPECT_EQ(old_result, FormatPack(format, absl::MakeSpan(args)));
-          }
-        }
-      }
-    }
-  }
-}
-
-TYPED_TEST_P(TypedFormatConvertTest, Char) {
-  typedef TypeParam T;
-  using remove_volatile_t = typename std::remove_volatile<T>::type;
-  static const T kMin = std::numeric_limits<remove_volatile_t>::min();
-  static const T kMax = std::numeric_limits<remove_volatile_t>::max();
-  T kVals[] = {
-    remove_volatile_t(1), remove_volatile_t(2), remove_volatile_t(10),
-    remove_volatile_t(-1), remove_volatile_t(-2), remove_volatile_t(-10),
-    remove_volatile_t(0),
-    kMin + remove_volatile_t(1), kMin,
-    kMax - remove_volatile_t(1), kMax
-  };
-  for (const T &c : kVals) {
-    const FormatArgImpl args[] = {FormatArgImpl(c)};
-    UntypedFormatSpecImpl format("%c");
-    EXPECT_EQ(StrPrint("%c", c), FormatPack(format, absl::MakeSpan(args)));
-  }
-}
-
-REGISTER_TYPED_TEST_CASE_P(TypedFormatConvertTest, AllIntsWithFlags, Char);
-
-typedef ::testing::Types<
-    int, unsigned, volatile int,
-    short, unsigned short,
-    long, unsigned long,
-    long long, unsigned long long,
-    signed char, unsigned char, char>
-    AllIntTypes;
-INSTANTIATE_TYPED_TEST_CASE_P(TypedFormatConvertTestWithAllIntTypes,
-                              TypedFormatConvertTest, AllIntTypes);
-TEST_F(FormatConvertTest, VectorBool) {
-  // Make sure vector<bool>'s values behave as bools.
-  std::vector<bool> v = {true, false};
-  const std::vector<bool> cv = {true, false};
-  EXPECT_EQ("1,0,1,0",
-            FormatPack(UntypedFormatSpecImpl("%d,%d,%d,%d"),
-                       absl::Span<const FormatArgImpl>(
-                           {FormatArgImpl(v[0]), FormatArgImpl(v[1]),
-                            FormatArgImpl(cv[0]), FormatArgImpl(cv[1])})));
-}
-
-
-TEST_F(FormatConvertTest, Int128) {
-  absl::int128 positive = static_cast<absl::int128>(0x1234567890abcdef) * 1979;
-  absl::int128 negative = -positive;
-  absl::int128 max = absl::Int128Max(), min = absl::Int128Min();
-  const FormatArgImpl args[] = {FormatArgImpl(positive),
-                                FormatArgImpl(negative), FormatArgImpl(max),
-                                FormatArgImpl(min)};
-
-  struct Case {
-    const char* format;
-    const char* expected;
-  } cases[] = {
-      {"%1$d", "2595989796776606496405"},
-      {"%1$30d", "        2595989796776606496405"},
-      {"%1$-30d", "2595989796776606496405        "},
-      {"%1$u", "2595989796776606496405"},
-      {"%1$x", "8cba9876066020f695"},
-      {"%2$d", "-2595989796776606496405"},
-      {"%2$30d", "       -2595989796776606496405"},
-      {"%2$-30d", "-2595989796776606496405       "},
-      {"%2$u", "340282366920938460867384810655161715051"},
-      {"%2$x", "ffffffffffffff73456789f99fdf096b"},
-      {"%3$d", "170141183460469231731687303715884105727"},
-      {"%3$u", "170141183460469231731687303715884105727"},
-      {"%3$x", "7fffffffffffffffffffffffffffffff"},
-      {"%4$d", "-170141183460469231731687303715884105728"},
-      {"%4$x", "80000000000000000000000000000000"},
-  };
-
-  for (auto c : cases) {
-    UntypedFormatSpecImpl format(c.format);
-    EXPECT_EQ(c.expected, FormatPack(format, absl::MakeSpan(args)));
-  }
-}
-
-TEST_F(FormatConvertTest, Uint128) {
-  absl::uint128 v = static_cast<absl::uint128>(0x1234567890abcdef) * 1979;
-  absl::uint128 max = absl::Uint128Max();
-  const FormatArgImpl args[] = {FormatArgImpl(v), FormatArgImpl(max)};
-
-  struct Case {
-    const char* format;
-    const char* expected;
-  } cases[] = {
-      {"%1$d", "2595989796776606496405"},
-      {"%1$30d", "        2595989796776606496405"},
-      {"%1$-30d", "2595989796776606496405        "},
-      {"%1$u", "2595989796776606496405"},
-      {"%1$x", "8cba9876066020f695"},
-      {"%2$d", "340282366920938463463374607431768211455"},
-      {"%2$u", "340282366920938463463374607431768211455"},
-      {"%2$x", "ffffffffffffffffffffffffffffffff"},
-  };
-
-  for (auto c : cases) {
-    UntypedFormatSpecImpl format(c.format);
-    EXPECT_EQ(c.expected, FormatPack(format, absl::MakeSpan(args)));
-  }
-}
-
-template <typename Floating>
-void TestWithMultipleFormatsHelper(const std::vector<Floating> &floats) {
-  const NativePrintfTraits &native_traits = VerifyNativeImplementation();
-  // Reserve the space to ensure we don't allocate memory in the output itself.
-  std::string str_format_result;
-  str_format_result.reserve(1 << 20);
-  std::string string_printf_result;
-  string_printf_result.reserve(1 << 20);
-
-  const char *const kFormats[] = {
-      "%",  "%.3", "%8.5", "%500",   "%.5000", "%.60", "%.30",   "%03",
-      "%+", "% ",  "%-10", "%#15.3", "%#.0",   "%.0",  "%1$*2$", "%1$.*2$"};
-
-  for (const char *fmt : kFormats) {
-    for (char f : {'f', 'F',  //
-                   'g', 'G',  //
-                   'a', 'A',  //
-                   'e', 'E'}) {
-      std::string fmt_str = std::string(fmt) + f;
-
-      if (fmt == absl::string_view("%.5000") && f != 'f' && f != 'F' &&
-          f != 'a' && f != 'A') {
-        // This particular test takes way too long with snprintf.
-        // Disable for the case we are not implementing natively.
-        continue;
-      }
-
-      if ((f == 'a' || f == 'A') &&
-          !native_traits.hex_float_has_glibc_rounding) {
-        continue;
-      }
-
-      for (Floating d : floats) {
-        if (!native_traits.hex_float_prefers_denormal_repr &&
-            (f == 'a' || f == 'A') && std::fpclassify(d) == FP_SUBNORMAL) {
-          continue;
-        }
-        int i = -10;
-        FormatArgImpl args[2] = {FormatArgImpl(d), FormatArgImpl(i)};
-        UntypedFormatSpecImpl format(fmt_str);
-
-        string_printf_result.clear();
-        StrAppend(&string_printf_result, fmt_str.c_str(), d, i);
-        str_format_result.clear();
-
-        {
-          AppendPack(&str_format_result, format, absl::MakeSpan(args));
-        }
-
-        if (string_printf_result != str_format_result) {
-          // We use ASSERT_EQ here because failures are usually correlated and a
-          // bug would print way too many failed expectations causing the test
-          // to time out.
-          ASSERT_EQ(string_printf_result, str_format_result)
-              << fmt_str << " " << StrPrint("%.18g", d) << " "
-              << StrPrint("%a", d) << " " << StrPrint("%.50f", d);
-        }
-      }
-    }
-  }
-}
-
-TEST_F(FormatConvertTest, Float) {
-#ifdef _MSC_VER
-  // MSVC has a different rounding policy than us so we can't test our
-  // implementation against the native one there.
-  return;
-#endif  // _MSC_VER
-
-  std::vector<float> floats = {0.0f,
-                               -0.0f,
-                               .9999999f,
-                               9999999.f,
-                               std::numeric_limits<float>::max(),
-                               -std::numeric_limits<float>::max(),
-                               std::numeric_limits<float>::min(),
-                               -std::numeric_limits<float>::min(),
-                               std::numeric_limits<float>::lowest(),
-                               -std::numeric_limits<float>::lowest(),
-                               std::numeric_limits<float>::epsilon(),
-                               std::numeric_limits<float>::epsilon() + 1.0f,
-                               std::numeric_limits<float>::infinity(),
-                               -std::numeric_limits<float>::infinity()};
-
-  // Some regression tests.
-  floats.push_back(0.999999989f);
-
-  if (std::numeric_limits<float>::has_denorm != std::denorm_absent) {
-    floats.push_back(std::numeric_limits<float>::denorm_min());
-    floats.push_back(-std::numeric_limits<float>::denorm_min());
-  }
-
-  for (float base :
-       {1.f, 12.f, 123.f, 1234.f, 12345.f, 123456.f, 1234567.f, 12345678.f,
-        123456789.f, 1234567890.f, 12345678901.f, 12345678.f, 12345678.f}) {
-    for (int exp = -123; exp <= 123; ++exp) {
-      for (int sign : {1, -1}) {
-        floats.push_back(sign * std::ldexp(base, exp));
-      }
-    }
-  }
-
-  for (int exp = -300; exp <= 300; ++exp) {
-    const float all_ones_mantissa = 0xffffff;
-    floats.push_back(std::ldexp(all_ones_mantissa, exp));
-  }
-
-  // Remove duplicates to speed up the logic below.
-  std::sort(floats.begin(), floats.end());
-  floats.erase(std::unique(floats.begin(), floats.end()), floats.end());
-
-#ifndef __APPLE__
-  // Apple formats NaN differently (+nan) vs. (nan)
-  floats.push_back(std::nan(""));
-#endif
-
-  TestWithMultipleFormatsHelper(floats);
-}
-
-TEST_F(FormatConvertTest, Double) {
-#ifdef _MSC_VER
-  // MSVC has a different rounding policy than us so we can't test our
-  // implementation against the native one there.
-  return;
-#endif  // _MSC_VER
-
-  std::vector<double> doubles = {0.0,
-                                 -0.0,
-                                 .99999999999999,
-                                 99999999999999.,
-                                 std::numeric_limits<double>::max(),
-                                 -std::numeric_limits<double>::max(),
-                                 std::numeric_limits<double>::min(),
-                                 -std::numeric_limits<double>::min(),
-                                 std::numeric_limits<double>::lowest(),
-                                 -std::numeric_limits<double>::lowest(),
-                                 std::numeric_limits<double>::epsilon(),
-                                 std::numeric_limits<double>::epsilon() + 1,
-                                 std::numeric_limits<double>::infinity(),
-                                 -std::numeric_limits<double>::infinity()};
-
-  // Some regression tests.
-  doubles.push_back(0.99999999999999989);
-
-  if (std::numeric_limits<double>::has_denorm != std::denorm_absent) {
-    doubles.push_back(std::numeric_limits<double>::denorm_min());
-    doubles.push_back(-std::numeric_limits<double>::denorm_min());
-  }
-
-  for (double base :
-       {1., 12., 123., 1234., 12345., 123456., 1234567., 12345678., 123456789.,
-        1234567890., 12345678901., 123456789012., 1234567890123.}) {
-    for (int exp = -123; exp <= 123; ++exp) {
-      for (int sign : {1, -1}) {
-        doubles.push_back(sign * std::ldexp(base, exp));
-      }
-    }
-  }
-
-  // Workaround libc bug.
-  // https://sourceware.org/bugzilla/show_bug.cgi?id=22142
-  const bool gcc_bug_22142 =
-      StrPrint("%f", std::numeric_limits<double>::max()) !=
-      "1797693134862315708145274237317043567980705675258449965989174768031"
-      "5726078002853876058955863276687817154045895351438246423432132688946"
-      "4182768467546703537516986049910576551282076245490090389328944075868"
-      "5084551339423045832369032229481658085593321233482747978262041447231"
-      "68738177180919299881250404026184124858368.000000";
-
-  if (!gcc_bug_22142) {
-    for (int exp = -300; exp <= 300; ++exp) {
-      const double all_ones_mantissa = 0x1fffffffffffff;
-      doubles.push_back(std::ldexp(all_ones_mantissa, exp));
-    }
-  }
-
-  if (gcc_bug_22142) {
-    for (auto &d : doubles) {
-      using L = std::numeric_limits<double>;
-      double d2 = std::abs(d);
-      if (d2 == L::max() || d2 == L::min() || d2 == L::denorm_min()) {
-        d = 0;
-      }
-    }
-  }
-
-  // Remove duplicates to speed up the logic below.
-  std::sort(doubles.begin(), doubles.end());
-  doubles.erase(std::unique(doubles.begin(), doubles.end()), doubles.end());
-
-#ifndef __APPLE__
-  // Apple formats NaN differently (+nan) vs. (nan)
-  doubles.push_back(std::nan(""));
-#endif
-
-  TestWithMultipleFormatsHelper(doubles);
-}
-
-TEST_F(FormatConvertTest, DoubleRound) {
-  std::string s;
-  const auto format = [&](const char *fmt, double d) -> std::string & {
-    s.clear();
-    FormatArgImpl args[1] = {FormatArgImpl(d)};
-    AppendPack(&s, UntypedFormatSpecImpl(fmt), absl::MakeSpan(args));
-#if !defined(_MSC_VER)
-    // MSVC has a different rounding policy than us so we can't test our
-    // implementation against the native one there.
-    EXPECT_EQ(StrPrint(fmt, d), s);
-#endif  // _MSC_VER
-
-    return s;
-  };
-  // All of these values have to be exactly represented.
-  // Otherwise we might not be testing what we think we are testing.
-
-  // These values can fit in a 64bit "fast" representation.
-  const double exact_value = 0.00000000000005684341886080801486968994140625;
-  assert(exact_value == std::pow(2, -44));
-  // Round up at a 5xx.
-  EXPECT_EQ(format("%.13f", exact_value), "0.0000000000001");
-  // Round up at a >5
-  EXPECT_EQ(format("%.14f", exact_value), "0.00000000000006");
-  // Round down at a <5
-  EXPECT_EQ(format("%.16f", exact_value), "0.0000000000000568");
-  // Nine handling
-  EXPECT_EQ(format("%.35f", exact_value),
-            "0.00000000000005684341886080801486969");
-  EXPECT_EQ(format("%.36f", exact_value),
-            "0.000000000000056843418860808014869690");
-  // Round down the last nine.
-  EXPECT_EQ(format("%.37f", exact_value),
-            "0.0000000000000568434188608080148696899");
-  EXPECT_EQ(format("%.10f", 0.000003814697265625), "0.0000038147");
-  // Round up the last nine
-  EXPECT_EQ(format("%.11f", 0.000003814697265625), "0.00000381470");
-  EXPECT_EQ(format("%.12f", 0.000003814697265625), "0.000003814697");
-
-  // Round to even (down)
-  EXPECT_EQ(format("%.43f", exact_value),
-            "0.0000000000000568434188608080148696899414062");
-  // Exact
-  EXPECT_EQ(format("%.44f", exact_value),
-            "0.00000000000005684341886080801486968994140625");
-  // Round to even (up), let make the last digits 75 instead of 25
-  EXPECT_EQ(format("%.43f", exact_value + std::pow(2, -43)),
-            "0.0000000000001705302565824240446090698242188");
-  // Exact, just to check.
-  EXPECT_EQ(format("%.44f", exact_value + std::pow(2, -43)),
-            "0.00000000000017053025658242404460906982421875");
-
-  // This value has to be small enough that it won't fit in the uint128
-  // representation for printing.
-  const double small_exact_value =
-      0.000000000000000000000000000000000000752316384526264005099991383822237233803945956334136013765601092018187046051025390625;  // NOLINT
-  assert(small_exact_value == std::pow(2, -120));
-  // Round up at a 5xx.
-  EXPECT_EQ(format("%.37f", small_exact_value),
-            "0.0000000000000000000000000000000000008");
-  // Round down at a <5
-  EXPECT_EQ(format("%.38f", small_exact_value),
-            "0.00000000000000000000000000000000000075");
-  // Round up at a >5
-  EXPECT_EQ(format("%.41f", small_exact_value),
-            "0.00000000000000000000000000000000000075232");
-  // Nine handling
-  EXPECT_EQ(format("%.55f", small_exact_value),
-            "0.0000000000000000000000000000000000007523163845262640051");
-  EXPECT_EQ(format("%.56f", small_exact_value),
-            "0.00000000000000000000000000000000000075231638452626400510");
-  EXPECT_EQ(format("%.57f", small_exact_value),
-            "0.000000000000000000000000000000000000752316384526264005100");
-  EXPECT_EQ(format("%.58f", small_exact_value),
-            "0.0000000000000000000000000000000000007523163845262640051000");
-  // Round down the last nine
-  EXPECT_EQ(format("%.59f", small_exact_value),
-            "0.00000000000000000000000000000000000075231638452626400509999");
-  // Round up the last nine
-  EXPECT_EQ(format("%.79f", small_exact_value),
-            "0.000000000000000000000000000000000000"
-            "7523163845262640050999913838222372338039460");
-
-  // Round to even (down)
-  EXPECT_EQ(format("%.119f", small_exact_value),
-            "0.000000000000000000000000000000000000"
-            "75231638452626400509999138382223723380"
-            "394595633413601376560109201818704605102539062");
-  // Exact
-  EXPECT_EQ(format("%.120f", small_exact_value),
-            "0.000000000000000000000000000000000000"
-            "75231638452626400509999138382223723380"
-            "3945956334136013765601092018187046051025390625");
-  // Round to even (up), let make the last digits 75 instead of 25
-  EXPECT_EQ(format("%.119f", small_exact_value + std::pow(2, -119)),
-            "0.000000000000000000000000000000000002"
-            "25694915357879201529997415146671170141"
-            "183786900240804129680327605456113815307617188");
-  // Exact, just to check.
-  EXPECT_EQ(format("%.120f", small_exact_value + std::pow(2, -119)),
-            "0.000000000000000000000000000000000002"
-            "25694915357879201529997415146671170141"
-            "1837869002408041296803276054561138153076171875");
-}
-
-TEST_F(FormatConvertTest, DoubleRoundA) {
-  const NativePrintfTraits &native_traits = VerifyNativeImplementation();
-  std::string s;
-  const auto format = [&](const char *fmt, double d) -> std::string & {
-    s.clear();
-    FormatArgImpl args[1] = {FormatArgImpl(d)};
-    AppendPack(&s, UntypedFormatSpecImpl(fmt), absl::MakeSpan(args));
-    if (native_traits.hex_float_has_glibc_rounding) {
-      EXPECT_EQ(StrPrint(fmt, d), s);
-    }
-    return s;
-  };
-
-  // 0x1.00018000p+100
-  const double on_boundary_odd = 1267679614447900152596896153600.0;
-  EXPECT_EQ(format("%.0a", on_boundary_odd), "0x1p+100");
-  EXPECT_EQ(format("%.1a", on_boundary_odd), "0x1.0p+100");
-  EXPECT_EQ(format("%.2a", on_boundary_odd), "0x1.00p+100");
-  EXPECT_EQ(format("%.3a", on_boundary_odd), "0x1.000p+100");
-  EXPECT_EQ(format("%.4a", on_boundary_odd), "0x1.0002p+100");  // round
-  EXPECT_EQ(format("%.5a", on_boundary_odd), "0x1.00018p+100");
-  EXPECT_EQ(format("%.6a", on_boundary_odd), "0x1.000180p+100");
-
-  // 0x1.00028000p-2
-  const double on_boundary_even = 0.250009536743164062500;
-  EXPECT_EQ(format("%.0a", on_boundary_even), "0x1p-2");
-  EXPECT_EQ(format("%.1a", on_boundary_even), "0x1.0p-2");
-  EXPECT_EQ(format("%.2a", on_boundary_even), "0x1.00p-2");
-  EXPECT_EQ(format("%.3a", on_boundary_even), "0x1.000p-2");
-  EXPECT_EQ(format("%.4a", on_boundary_even), "0x1.0002p-2");  // no round
-  EXPECT_EQ(format("%.5a", on_boundary_even), "0x1.00028p-2");
-  EXPECT_EQ(format("%.6a", on_boundary_even), "0x1.000280p-2");
-
-  // 0x1.00018001p+1
-  const double slightly_over = 2.00004577683284878730773925781250;
-  EXPECT_EQ(format("%.0a", slightly_over), "0x1p+1");
-  EXPECT_EQ(format("%.1a", slightly_over), "0x1.0p+1");
-  EXPECT_EQ(format("%.2a", slightly_over), "0x1.00p+1");
-  EXPECT_EQ(format("%.3a", slightly_over), "0x1.000p+1");
-  EXPECT_EQ(format("%.4a", slightly_over), "0x1.0002p+1");
-  EXPECT_EQ(format("%.5a", slightly_over), "0x1.00018p+1");
-  EXPECT_EQ(format("%.6a", slightly_over), "0x1.000180p+1");
-
-  // 0x1.00017fffp+0
-  const double slightly_under = 1.000022887950763106346130371093750;
-  EXPECT_EQ(format("%.0a", slightly_under), "0x1p+0");
-  EXPECT_EQ(format("%.1a", slightly_under), "0x1.0p+0");
-  EXPECT_EQ(format("%.2a", slightly_under), "0x1.00p+0");
-  EXPECT_EQ(format("%.3a", slightly_under), "0x1.000p+0");
-  EXPECT_EQ(format("%.4a", slightly_under), "0x1.0001p+0");
-  EXPECT_EQ(format("%.5a", slightly_under), "0x1.00018p+0");
-  EXPECT_EQ(format("%.6a", slightly_under), "0x1.000180p+0");
-  EXPECT_EQ(format("%.7a", slightly_under), "0x1.0001800p+0");
-
-  // 0x1.1b3829ac28058p+3
-  const double hex_value = 8.85060580848964661981881363317370414733886718750;
-  EXPECT_EQ(format("%.0a", hex_value), "0x1p+3");
-  EXPECT_EQ(format("%.1a", hex_value), "0x1.2p+3");
-  EXPECT_EQ(format("%.2a", hex_value), "0x1.1bp+3");
-  EXPECT_EQ(format("%.3a", hex_value), "0x1.1b4p+3");
-  EXPECT_EQ(format("%.4a", hex_value), "0x1.1b38p+3");
-  EXPECT_EQ(format("%.5a", hex_value), "0x1.1b383p+3");
-  EXPECT_EQ(format("%.6a", hex_value), "0x1.1b382ap+3");
-  EXPECT_EQ(format("%.7a", hex_value), "0x1.1b3829bp+3");
-  EXPECT_EQ(format("%.8a", hex_value), "0x1.1b3829acp+3");
-  EXPECT_EQ(format("%.9a", hex_value), "0x1.1b3829ac3p+3");
-  EXPECT_EQ(format("%.10a", hex_value), "0x1.1b3829ac28p+3");
-  EXPECT_EQ(format("%.11a", hex_value), "0x1.1b3829ac280p+3");
-  EXPECT_EQ(format("%.12a", hex_value), "0x1.1b3829ac2806p+3");
-  EXPECT_EQ(format("%.13a", hex_value), "0x1.1b3829ac28058p+3");
-  EXPECT_EQ(format("%.14a", hex_value), "0x1.1b3829ac280580p+3");
-  EXPECT_EQ(format("%.15a", hex_value), "0x1.1b3829ac2805800p+3");
-  EXPECT_EQ(format("%.16a", hex_value), "0x1.1b3829ac28058000p+3");
-  EXPECT_EQ(format("%.17a", hex_value), "0x1.1b3829ac280580000p+3");
-  EXPECT_EQ(format("%.18a", hex_value), "0x1.1b3829ac2805800000p+3");
-  EXPECT_EQ(format("%.19a", hex_value), "0x1.1b3829ac28058000000p+3");
-  EXPECT_EQ(format("%.20a", hex_value), "0x1.1b3829ac280580000000p+3");
-  EXPECT_EQ(format("%.21a", hex_value), "0x1.1b3829ac2805800000000p+3");
-
-  // 0x1.0818283848586p+3
-  const double hex_value2 = 8.2529488658208371987257123691961169242858886718750;
-  EXPECT_EQ(format("%.0a", hex_value2), "0x1p+3");
-  EXPECT_EQ(format("%.1a", hex_value2), "0x1.1p+3");
-  EXPECT_EQ(format("%.2a", hex_value2), "0x1.08p+3");
-  EXPECT_EQ(format("%.3a", hex_value2), "0x1.082p+3");
-  EXPECT_EQ(format("%.4a", hex_value2), "0x1.0818p+3");
-  EXPECT_EQ(format("%.5a", hex_value2), "0x1.08183p+3");
-  EXPECT_EQ(format("%.6a", hex_value2), "0x1.081828p+3");
-  EXPECT_EQ(format("%.7a", hex_value2), "0x1.0818284p+3");
-  EXPECT_EQ(format("%.8a", hex_value2), "0x1.08182838p+3");
-  EXPECT_EQ(format("%.9a", hex_value2), "0x1.081828385p+3");
-  EXPECT_EQ(format("%.10a", hex_value2), "0x1.0818283848p+3");
-  EXPECT_EQ(format("%.11a", hex_value2), "0x1.08182838486p+3");
-  EXPECT_EQ(format("%.12a", hex_value2), "0x1.081828384858p+3");
-  EXPECT_EQ(format("%.13a", hex_value2), "0x1.0818283848586p+3");
-  EXPECT_EQ(format("%.14a", hex_value2), "0x1.08182838485860p+3");
-  EXPECT_EQ(format("%.15a", hex_value2), "0x1.081828384858600p+3");
-  EXPECT_EQ(format("%.16a", hex_value2), "0x1.0818283848586000p+3");
-  EXPECT_EQ(format("%.17a", hex_value2), "0x1.08182838485860000p+3");
-  EXPECT_EQ(format("%.18a", hex_value2), "0x1.081828384858600000p+3");
-  EXPECT_EQ(format("%.19a", hex_value2), "0x1.0818283848586000000p+3");
-  EXPECT_EQ(format("%.20a", hex_value2), "0x1.08182838485860000000p+3");
-  EXPECT_EQ(format("%.21a", hex_value2), "0x1.081828384858600000000p+3");
-}
-
-TEST_F(FormatConvertTest, LongDoubleRoundA) {
-  if (std::numeric_limits<long double>::digits % 4 != 0) {
-    // This test doesn't really make sense to run on platforms where a long
-    // double has a different mantissa size (mod 4) than Prod, since then the
-    // leading digit will be formatted differently.
-    return;
-  }
-  const NativePrintfTraits &native_traits = VerifyNativeImplementation();
-  std::string s;
-  const auto format = [&](const char *fmt, long double d) -> std::string & {
-    s.clear();
-    FormatArgImpl args[1] = {FormatArgImpl(d)};
-    AppendPack(&s, UntypedFormatSpecImpl(fmt), absl::MakeSpan(args));
-    if (native_traits.hex_float_has_glibc_rounding &&
-        native_traits.hex_float_optimizes_leading_digit_bit_count) {
-      EXPECT_EQ(StrPrint(fmt, d), s);
-    }
-    return s;
-  };
-
-  // 0x8.8p+4
-  const long double on_boundary_even = 136.0;
-  EXPECT_EQ(format("%.0La", on_boundary_even), "0x8p+4");
-  EXPECT_EQ(format("%.1La", on_boundary_even), "0x8.8p+4");
-  EXPECT_EQ(format("%.2La", on_boundary_even), "0x8.80p+4");
-  EXPECT_EQ(format("%.3La", on_boundary_even), "0x8.800p+4");
-  EXPECT_EQ(format("%.4La", on_boundary_even), "0x8.8000p+4");
-  EXPECT_EQ(format("%.5La", on_boundary_even), "0x8.80000p+4");
-  EXPECT_EQ(format("%.6La", on_boundary_even), "0x8.800000p+4");
-
-  // 0x9.8p+4
-  const long double on_boundary_odd = 152.0;
-  EXPECT_EQ(format("%.0La", on_boundary_odd), "0xap+4");
-  EXPECT_EQ(format("%.1La", on_boundary_odd), "0x9.8p+4");
-  EXPECT_EQ(format("%.2La", on_boundary_odd), "0x9.80p+4");
-  EXPECT_EQ(format("%.3La", on_boundary_odd), "0x9.800p+4");
-  EXPECT_EQ(format("%.4La", on_boundary_odd), "0x9.8000p+4");
-  EXPECT_EQ(format("%.5La", on_boundary_odd), "0x9.80000p+4");
-  EXPECT_EQ(format("%.6La", on_boundary_odd), "0x9.800000p+4");
-
-  // 0x8.80001p+24
-  const long double slightly_over = 142606352.0;
-  EXPECT_EQ(format("%.0La", slightly_over), "0x9p+24");
-  EXPECT_EQ(format("%.1La", slightly_over), "0x8.8p+24");
-  EXPECT_EQ(format("%.2La", slightly_over), "0x8.80p+24");
-  EXPECT_EQ(format("%.3La", slightly_over), "0x8.800p+24");
-  EXPECT_EQ(format("%.4La", slightly_over), "0x8.8000p+24");
-  EXPECT_EQ(format("%.5La", slightly_over), "0x8.80001p+24");
-  EXPECT_EQ(format("%.6La", slightly_over), "0x8.800010p+24");
-
-  // 0x8.7ffffp+24
-  const long double slightly_under = 142606320.0;
-  EXPECT_EQ(format("%.0La", slightly_under), "0x8p+24");
-  EXPECT_EQ(format("%.1La", slightly_under), "0x8.8p+24");
-  EXPECT_EQ(format("%.2La", slightly_under), "0x8.80p+24");
-  EXPECT_EQ(format("%.3La", slightly_under), "0x8.800p+24");
-  EXPECT_EQ(format("%.4La", slightly_under), "0x8.8000p+24");
-  EXPECT_EQ(format("%.5La", slightly_under), "0x8.7ffffp+24");
-  EXPECT_EQ(format("%.6La", slightly_under), "0x8.7ffff0p+24");
-  EXPECT_EQ(format("%.7La", slightly_under), "0x8.7ffff00p+24");
-
-  // 0xc.0828384858688000p+128
-  const long double eights = 4094231060438608800781871108094404067328.0;
-  EXPECT_EQ(format("%.0La", eights), "0xcp+128");
-  EXPECT_EQ(format("%.1La", eights), "0xc.1p+128");
-  EXPECT_EQ(format("%.2La", eights), "0xc.08p+128");
-  EXPECT_EQ(format("%.3La", eights), "0xc.083p+128");
-  EXPECT_EQ(format("%.4La", eights), "0xc.0828p+128");
-  EXPECT_EQ(format("%.5La", eights), "0xc.08284p+128");
-  EXPECT_EQ(format("%.6La", eights), "0xc.082838p+128");
-  EXPECT_EQ(format("%.7La", eights), "0xc.0828385p+128");
-  EXPECT_EQ(format("%.8La", eights), "0xc.08283848p+128");
-  EXPECT_EQ(format("%.9La", eights), "0xc.082838486p+128");
-  EXPECT_EQ(format("%.10La", eights), "0xc.0828384858p+128");
-  EXPECT_EQ(format("%.11La", eights), "0xc.08283848587p+128");
-  EXPECT_EQ(format("%.12La", eights), "0xc.082838485868p+128");
-  EXPECT_EQ(format("%.13La", eights), "0xc.0828384858688p+128");
-  EXPECT_EQ(format("%.14La", eights), "0xc.08283848586880p+128");
-  EXPECT_EQ(format("%.15La", eights), "0xc.082838485868800p+128");
-  EXPECT_EQ(format("%.16La", eights), "0xc.0828384858688000p+128");
-}
-
-// We don't actually store the results. This is just to exercise the rest of the
-// machinery.
-struct NullSink {
-  friend void AbslFormatFlush(NullSink *sink, string_view str) {}
-};
-
-template <typename... T>
-bool FormatWithNullSink(absl::string_view fmt, const T &... a) {
-  NullSink sink;
-  FormatArgImpl args[] = {FormatArgImpl(a)...};
-  return FormatUntyped(&sink, UntypedFormatSpecImpl(fmt), absl::MakeSpan(args));
-}
-
-TEST_F(FormatConvertTest, ExtremeWidthPrecision) {
-  for (const char *fmt : {"f"}) {
-    for (double d : {1e-100, 1.0, 1e100}) {
-      constexpr int max = std::numeric_limits<int>::max();
-      EXPECT_TRUE(FormatWithNullSink(std::string("%.*") + fmt, max, d));
-      EXPECT_TRUE(FormatWithNullSink(std::string("%1.*") + fmt, max, d));
-      EXPECT_TRUE(FormatWithNullSink(std::string("%*") + fmt, max, d));
-      EXPECT_TRUE(FormatWithNullSink(std::string("%*.*") + fmt, max, max, d));
-    }
-  }
-}
-
-TEST_F(FormatConvertTest, LongDouble) {
-#ifdef _MSC_VER
-  // MSVC has a different rounding policy than us so we can't test our
-  // implementation against the native one there.
-  return;
-#endif  // _MSC_VER
-  const NativePrintfTraits &native_traits = VerifyNativeImplementation();
-  const char *const kFormats[] = {"%",    "%.3", "%8.5", "%9",  "%.5000",
-                                  "%.60", "%+",  "% ",   "%-10"};
-
-  std::vector<long double> doubles = {
-      0.0,
-      -0.0,
-      std::numeric_limits<long double>::max(),
-      -std::numeric_limits<long double>::max(),
-      std::numeric_limits<long double>::min(),
-      -std::numeric_limits<long double>::min(),
-      std::numeric_limits<long double>::infinity(),
-      -std::numeric_limits<long double>::infinity()};
-
-  for (long double base : {1.L, 12.L, 123.L, 1234.L, 12345.L, 123456.L,
-                           1234567.L, 12345678.L, 123456789.L, 1234567890.L,
-                           12345678901.L, 123456789012.L, 1234567890123.L,
-                           // This value is not representable in double, but it
-                           // is in long double that uses the extended format.
-                           // This is to verify that we are not truncating the
-                           // value mistakenly through a double.
-                           10000000000000000.25L}) {
-    for (int exp : {-1000, -500, 0, 500, 1000}) {
-      for (int sign : {1, -1}) {
-        doubles.push_back(sign * std::ldexp(base, exp));
-        doubles.push_back(sign / std::ldexp(base, exp));
-      }
-    }
-  }
-
-  // Regression tests
-  //
-  // Using a string literal because not all platforms support hex literals or it
-  // might be out of range.
-  doubles.push_back(std::strtold("-0xf.ffffffb5feafffbp-16324L", nullptr));
-
-  for (const char *fmt : kFormats) {
-    for (char f : {'f', 'F',  //
-                   'g', 'G',  //
-                   'a', 'A',  //
-                   'e', 'E'}) {
-      std::string fmt_str = std::string(fmt) + 'L' + f;
-
-      if (fmt == absl::string_view("%.5000") && f != 'f' && f != 'F' &&
-          f != 'a' && f != 'A') {
-        // This particular test takes way too long with snprintf.
-        // Disable for the case we are not implementing natively.
-        continue;
-      }
-
-      if (f == 'a' || f == 'A') {
-        if (!native_traits.hex_float_has_glibc_rounding ||
-            !native_traits.hex_float_optimizes_leading_digit_bit_count) {
-          continue;
-        }
-      }
-
-      for (auto d : doubles) {
-        FormatArgImpl arg(d);
-        UntypedFormatSpecImpl format(fmt_str);
-        // We use ASSERT_EQ here because failures are usually correlated and a
-        // bug would print way too many failed expectations causing the test to
-        // time out.
-        ASSERT_EQ(StrPrint(fmt_str.c_str(), d), FormatPack(format, {&arg, 1}))
-            << fmt_str << " " << StrPrint("%.18Lg", d) << " "
-            << StrPrint("%La", d) << " " << StrPrint("%.1080Lf", d);
-      }
-    }
-  }
-}
-
-TEST_F(FormatConvertTest, IntAsDouble) {
-  const NativePrintfTraits &native_traits = VerifyNativeImplementation();
-  const int kMin = std::numeric_limits<int>::min();
-  const int kMax = std::numeric_limits<int>::max();
-  const int ia[] = {
-    1, 2, 3, 123,
-    -1, -2, -3, -123,
-    0, kMax - 1, kMax, kMin + 1, kMin };
-  for (const int fx : ia) {
-    SCOPED_TRACE(fx);
-    const FormatArgImpl args[] = {FormatArgImpl(fx)};
-    struct Expectation {
-      int line;
-      std::string out;
-      const char *fmt;
-    };
-    const double dx = static_cast<double>(fx);
-    std::vector<Expectation> expect = {
-        {__LINE__, StrPrint("%f", dx), "%f"},
-        {__LINE__, StrPrint("%12f", dx), "%12f"},
-        {__LINE__, StrPrint("%.12f", dx), "%.12f"},
-        {__LINE__, StrPrint("%.12a", dx), "%.12a"},
-    };
-    if (native_traits.hex_float_uses_minimal_precision_when_not_specified) {
-      Expectation ex = {__LINE__, StrPrint("%12a", dx), "%12a"};
-      expect.push_back(ex);
-    }
-    for (const Expectation &e : expect) {
-      SCOPED_TRACE(e.line);
-      SCOPED_TRACE(e.fmt);
-      UntypedFormatSpecImpl format(e.fmt);
-      EXPECT_EQ(e.out, FormatPack(format, absl::MakeSpan(args)));
-    }
-  }
-}
-
-template <typename T>
-bool FormatFails(const char* test_format, T value) {
-  std::string format_string = std::string("<<") + test_format + ">>";
-  UntypedFormatSpecImpl format(format_string);
-
-  int one = 1;
-  const FormatArgImpl args[] = {FormatArgImpl(value), FormatArgImpl(one)};
-  EXPECT_EQ(FormatPack(format, absl::MakeSpan(args)), "")
-      << "format=" << test_format << " value=" << value;
-  return FormatPack(format, absl::MakeSpan(args)).empty();
-}
-
-TEST_F(FormatConvertTest, ExpectedFailures) {
-  // Int input
-  EXPECT_TRUE(FormatFails("%p", 1));
-  EXPECT_TRUE(FormatFails("%s", 1));
-  EXPECT_TRUE(FormatFails("%n", 1));
-
-  // Double input
-  EXPECT_TRUE(FormatFails("%p", 1.));
-  EXPECT_TRUE(FormatFails("%s", 1.));
-  EXPECT_TRUE(FormatFails("%n", 1.));
-  EXPECT_TRUE(FormatFails("%c", 1.));
-  EXPECT_TRUE(FormatFails("%d", 1.));
-  EXPECT_TRUE(FormatFails("%x", 1.));
-  EXPECT_TRUE(FormatFails("%*d", 1.));
-
-  // String input
-  EXPECT_TRUE(FormatFails("%n", ""));
-  EXPECT_TRUE(FormatFails("%c", ""));
-  EXPECT_TRUE(FormatFails("%d", ""));
-  EXPECT_TRUE(FormatFails("%x", ""));
-  EXPECT_TRUE(FormatFails("%f", ""));
-  EXPECT_TRUE(FormatFails("%*d", ""));
-}
-
-// Sanity check to make sure that we are testing what we think we're testing on
-// e.g. the x86_64+glibc platform.
-TEST_F(FormatConvertTest, GlibcHasCorrectTraits) {
-#if !defined(__GLIBC__) || !defined(__x86_64__)
-  return;
-#endif
-  const NativePrintfTraits &native_traits = VerifyNativeImplementation();
-  // If one of the following tests break then it is either because the above PP
-  // macro guards failed to exclude a new platform (likely) or because something
-  // has changed in the implemention of glibc sprintf float formatting behavior.
-  // If the latter, then the code that computes these flags needs to be
-  // revisited and/or possibly the StrFormat implementation.
-  EXPECT_TRUE(native_traits.hex_float_has_glibc_rounding);
-  EXPECT_TRUE(native_traits.hex_float_prefers_denormal_repr);
-  EXPECT_TRUE(
-      native_traits.hex_float_uses_minimal_precision_when_not_specified);
-  EXPECT_TRUE(native_traits.hex_float_optimizes_leading_digit_bit_count);
-}
-
-}  // namespace
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/extension.cc b/third_party/abseil/absl/strings/internal/str_format/extension.cc
deleted file mode 100644
index bb0d96c..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/extension.cc
+++ /dev/null
@@ -1,75 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/extension.h"
-
-#include <errno.h>
-#include <algorithm>
-#include <string>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-std::string Flags::ToString() const {
-  std::string s;
-  s.append(left     ? "-" : "");
-  s.append(show_pos ? "+" : "");
-  s.append(sign_col ? " " : "");
-  s.append(alt      ? "#" : "");
-  s.append(zero     ? "0" : "");
-  return s;
-}
-
-#define ABSL_INTERNAL_X_VAL(id) \
-  constexpr absl::FormatConversionChar FormatConversionCharInternal::id;
-ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, )
-#undef ABSL_INTERNAL_X_VAL
-// NOLINTNEXTLINE(readability-redundant-declaration)
-constexpr absl::FormatConversionChar FormatConversionCharInternal::kNone;
-
-#define ABSL_INTERNAL_CHAR_SET_CASE(c) \
-  constexpr FormatConversionCharSet FormatConversionCharSetInternal::c;
-ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_CHAR_SET_CASE, )
-#undef ABSL_INTERNAL_CHAR_SET_CASE
-
-// NOLINTNEXTLINE(readability-redundant-declaration)
-constexpr FormatConversionCharSet FormatConversionCharSetInternal::kStar;
-// NOLINTNEXTLINE(readability-redundant-declaration)
-constexpr FormatConversionCharSet FormatConversionCharSetInternal::kIntegral;
-// NOLINTNEXTLINE(readability-redundant-declaration)
-constexpr FormatConversionCharSet FormatConversionCharSetInternal::kFloating;
-// NOLINTNEXTLINE(readability-redundant-declaration)
-constexpr FormatConversionCharSet FormatConversionCharSetInternal::kNumeric;
-// NOLINTNEXTLINE(readability-redundant-declaration)
-constexpr FormatConversionCharSet FormatConversionCharSetInternal::kPointer;
-
-bool FormatSinkImpl::PutPaddedString(string_view value, int width,
-                                     int precision, bool left) {
-  size_t space_remaining = 0;
-  if (width >= 0) space_remaining = width;
-  size_t n = value.size();
-  if (precision >= 0) n = std::min(n, static_cast<size_t>(precision));
-  string_view shown(value.data(), n);
-  space_remaining = Excess(shown.size(), space_remaining);
-  if (!left) Append(space_remaining, ' ');
-  Append(shown);
-  if (left) Append(space_remaining, ' ');
-  return true;
-}
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/extension.h b/third_party/abseil/absl/strings/internal/str_format/extension.h
deleted file mode 100644
index a9b9e13..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/extension.h
+++ /dev/null
@@ -1,427 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_EXTENSION_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_EXTENSION_H_
-
-#include <limits.h>
-
-#include <cstddef>
-#include <cstring>
-#include <ostream>
-
-#include "absl/base/config.h"
-#include "absl/base/port.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/internal/str_format/output.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-enum class FormatConversionChar : uint8_t;
-enum class FormatConversionCharSet : uint64_t;
-
-namespace str_format_internal {
-
-class FormatRawSinkImpl {
- public:
-  // Implicitly convert from any type that provides the hook function as
-  // described above.
-  template <typename T, decltype(str_format_internal::InvokeFlush(
-                            std::declval<T*>(), string_view()))* = nullptr>
-  FormatRawSinkImpl(T* raw)  // NOLINT
-      : sink_(raw), write_(&FormatRawSinkImpl::Flush<T>) {}
-
-  void Write(string_view s) { write_(sink_, s); }
-
-  template <typename T>
-  static FormatRawSinkImpl Extract(T s) {
-    return s.sink_;
-  }
-
- private:
-  template <typename T>
-  static void Flush(void* r, string_view s) {
-    str_format_internal::InvokeFlush(static_cast<T*>(r), s);
-  }
-
-  void* sink_;
-  void (*write_)(void*, string_view);
-};
-
-// An abstraction to which conversions write their string data.
-class FormatSinkImpl {
- public:
-  explicit FormatSinkImpl(FormatRawSinkImpl raw) : raw_(raw) {}
-
-  ~FormatSinkImpl() { Flush(); }
-
-  void Flush() {
-    raw_.Write(string_view(buf_, pos_ - buf_));
-    pos_ = buf_;
-  }
-
-  void Append(size_t n, char c) {
-    if (n == 0) return;
-    size_ += n;
-    auto raw_append = [&](size_t count) {
-      memset(pos_, c, count);
-      pos_ += count;
-    };
-    while (n > Avail()) {
-      n -= Avail();
-      if (Avail() > 0) {
-        raw_append(Avail());
-      }
-      Flush();
-    }
-    raw_append(n);
-  }
-
-  void Append(string_view v) {
-    size_t n = v.size();
-    if (n == 0) return;
-    size_ += n;
-    if (n >= Avail()) {
-      Flush();
-      raw_.Write(v);
-      return;
-    }
-    memcpy(pos_, v.data(), n);
-    pos_ += n;
-  }
-
-  size_t size() const { return size_; }
-
-  // Put 'v' to 'sink' with specified width, precision, and left flag.
-  bool PutPaddedString(string_view v, int width, int precision, bool left);
-
-  template <typename T>
-  T Wrap() {
-    return T(this);
-  }
-
-  template <typename T>
-  static FormatSinkImpl* Extract(T* s) {
-    return s->sink_;
-  }
-
- private:
-  size_t Avail() const { return buf_ + sizeof(buf_) - pos_; }
-
-  FormatRawSinkImpl raw_;
-  size_t size_ = 0;
-  char* pos_ = buf_;
-  char buf_[1024];
-};
-
-struct Flags {
-  bool basic : 1;     // fastest conversion: no flags, width, or precision
-  bool left : 1;      // "-"
-  bool show_pos : 1;  // "+"
-  bool sign_col : 1;  // " "
-  bool alt : 1;       // "#"
-  bool zero : 1;      // "0"
-  std::string ToString() const;
-  friend std::ostream& operator<<(std::ostream& os, const Flags& v) {
-    return os << v.ToString();
-  }
-};
-
-// clang-format off
-#define ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(X_VAL, X_SEP) \
-  /* text */ \
-  X_VAL(c) X_SEP X_VAL(s) X_SEP \
-  /* ints */ \
-  X_VAL(d) X_SEP X_VAL(i) X_SEP X_VAL(o) X_SEP \
-  X_VAL(u) X_SEP X_VAL(x) X_SEP X_VAL(X) X_SEP \
-  /* floats */ \
-  X_VAL(f) X_SEP X_VAL(F) X_SEP X_VAL(e) X_SEP X_VAL(E) X_SEP \
-  X_VAL(g) X_SEP X_VAL(G) X_SEP X_VAL(a) X_SEP X_VAL(A) X_SEP \
-  /* misc */ \
-  X_VAL(n) X_SEP X_VAL(p)
-// clang-format on
-
-// This type should not be referenced, it exists only to provide labels
-// internally that match the values declared in FormatConversionChar in
-// str_format.h. This is meant to allow internal libraries to use the same
-// declared interface type as the public interface
-// (absl::StrFormatConversionChar) while keeping the definition in a public
-// header.
-// Internal libraries should use the form
-// `FormatConversionCharInternal::c`, `FormatConversionCharInternal::kNone` for
-// comparisons.  Use in switch statements is not recommended due to a bug in how
-// gcc 4.9 -Wswitch handles declared but undefined enums.
-struct FormatConversionCharInternal {
-  FormatConversionCharInternal() = delete;
-
- private:
-  // clang-format off
-  enum class Enum : uint8_t {
-    c, s,                    // text
-    d, i, o, u, x, X,        // int
-    f, F, e, E, g, G, a, A,  // float
-    n, p,                    // misc
-    kNone
-  };
-  // clang-format on
- public:
-#define ABSL_INTERNAL_X_VAL(id)              \
-  static constexpr FormatConversionChar id = \
-      static_cast<FormatConversionChar>(Enum::id);
-  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, )
-#undef ABSL_INTERNAL_X_VAL
-  static constexpr FormatConversionChar kNone =
-      static_cast<FormatConversionChar>(Enum::kNone);
-};
-// clang-format on
-
-inline FormatConversionChar FormatConversionCharFromChar(char c) {
-  switch (c) {
-#define ABSL_INTERNAL_X_VAL(id) \
-  case #id[0]:                  \
-    return FormatConversionCharInternal::id;
-    ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL, )
-#undef ABSL_INTERNAL_X_VAL
-  }
-  return FormatConversionCharInternal::kNone;
-}
-
-inline bool FormatConversionCharIsUpper(FormatConversionChar c) {
-  if (c == FormatConversionCharInternal::X ||
-      c == FormatConversionCharInternal::F ||
-      c == FormatConversionCharInternal::E ||
-      c == FormatConversionCharInternal::G ||
-      c == FormatConversionCharInternal::A) {
-    return true;
-  } else {
-    return false;
-  }
-}
-
-inline bool FormatConversionCharIsFloat(FormatConversionChar c) {
-  if (c == FormatConversionCharInternal::a ||
-      c == FormatConversionCharInternal::e ||
-      c == FormatConversionCharInternal::f ||
-      c == FormatConversionCharInternal::g ||
-      c == FormatConversionCharInternal::A ||
-      c == FormatConversionCharInternal::E ||
-      c == FormatConversionCharInternal::F ||
-      c == FormatConversionCharInternal::G) {
-    return true;
-  } else {
-    return false;
-  }
-}
-
-inline char FormatConversionCharToChar(FormatConversionChar c) {
-  if (c == FormatConversionCharInternal::kNone) {
-    return '\0';
-
-#define ABSL_INTERNAL_X_VAL(e)                       \
-  } else if (c == FormatConversionCharInternal::e) { \
-    return #e[0];
-#define ABSL_INTERNAL_X_SEP
-  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_X_VAL,
-                                         ABSL_INTERNAL_X_SEP)
-  } else {
-    return '\0';
-  }
-
-#undef ABSL_INTERNAL_X_VAL
-#undef ABSL_INTERNAL_X_SEP
-}
-
-// The associated char.
-inline std::ostream& operator<<(std::ostream& os, FormatConversionChar v) {
-  char c = FormatConversionCharToChar(v);
-  if (!c) c = '?';
-  return os << c;
-}
-
-struct FormatConversionSpecImplFriend;
-
-class FormatConversionSpecImpl {
- public:
-  // Width and precison are not specified, no flags are set.
-  bool is_basic() const { return flags_.basic; }
-  bool has_left_flag() const { return flags_.left; }
-  bool has_show_pos_flag() const { return flags_.show_pos; }
-  bool has_sign_col_flag() const { return flags_.sign_col; }
-  bool has_alt_flag() const { return flags_.alt; }
-  bool has_zero_flag() const { return flags_.zero; }
-
-  FormatConversionChar conversion_char() const {
-    // Keep this field first in the struct . It generates better code when
-    // accessing it when ConversionSpec is passed by value in registers.
-    static_assert(offsetof(FormatConversionSpecImpl, conv_) == 0, "");
-    return conv_;
-  }
-
-  // Returns the specified width. If width is unspecfied, it returns a negative
-  // value.
-  int width() const { return width_; }
-  // Returns the specified precision. If precision is unspecfied, it returns a
-  // negative value.
-  int precision() const { return precision_; }
-
-  template <typename T>
-  T Wrap() {
-    return T(*this);
-  }
-
- private:
-  friend struct str_format_internal::FormatConversionSpecImplFriend;
-  FormatConversionChar conv_ = FormatConversionCharInternal::kNone;
-  Flags flags_;
-  int width_;
-  int precision_;
-};
-
-struct FormatConversionSpecImplFriend final {
-  static void SetFlags(Flags f, FormatConversionSpecImpl* conv) {
-    conv->flags_ = f;
-  }
-  static void SetConversionChar(FormatConversionChar c,
-                                FormatConversionSpecImpl* conv) {
-    conv->conv_ = c;
-  }
-  static void SetWidth(int w, FormatConversionSpecImpl* conv) {
-    conv->width_ = w;
-  }
-  static void SetPrecision(int p, FormatConversionSpecImpl* conv) {
-    conv->precision_ = p;
-  }
-  static std::string FlagsToString(const FormatConversionSpecImpl& spec) {
-    return spec.flags_.ToString();
-  }
-};
-
-// Type safe OR operator.
-// We need this for two reasons:
-//  1. operator| on enums makes them decay to integers and the result is an
-//     integer. We need the result to stay as an enum.
-//  2. We use "enum class" which would not work even if we accepted the decay.
-constexpr FormatConversionCharSet FormatConversionCharSetUnion(
-    FormatConversionCharSet a) {
-  return a;
-}
-
-template <typename... CharSet>
-constexpr FormatConversionCharSet FormatConversionCharSetUnion(
-    FormatConversionCharSet a, CharSet... rest) {
-  return static_cast<FormatConversionCharSet>(
-      static_cast<uint64_t>(a) |
-      static_cast<uint64_t>(FormatConversionCharSetUnion(rest...)));
-}
-
-constexpr uint64_t FormatConversionCharToConvInt(FormatConversionChar c) {
-  return uint64_t{1} << (1 + static_cast<uint8_t>(c));
-}
-
-constexpr uint64_t FormatConversionCharToConvInt(char conv) {
-  return
-#define ABSL_INTERNAL_CHAR_SET_CASE(c)                                 \
-  conv == #c[0]                                                        \
-      ? FormatConversionCharToConvInt(FormatConversionCharInternal::c) \
-      :
-      ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_CHAR_SET_CASE, )
-#undef ABSL_INTERNAL_CHAR_SET_CASE
-                  conv == '*'
-          ? 1
-          : 0;
-}
-
-constexpr FormatConversionCharSet FormatConversionCharToConvValue(char conv) {
-  return static_cast<FormatConversionCharSet>(
-      FormatConversionCharToConvInt(conv));
-}
-
-struct FormatConversionCharSetInternal {
-#define ABSL_INTERNAL_CHAR_SET_CASE(c)         \
-  static constexpr FormatConversionCharSet c = \
-      FormatConversionCharToConvValue(#c[0]);
-  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(ABSL_INTERNAL_CHAR_SET_CASE, )
-#undef ABSL_INTERNAL_CHAR_SET_CASE
-
-  // Used for width/precision '*' specification.
-  static constexpr FormatConversionCharSet kStar =
-      FormatConversionCharToConvValue('*');
-
-  static constexpr FormatConversionCharSet kIntegral =
-      FormatConversionCharSetUnion(d, i, u, o, x, X);
-  static constexpr FormatConversionCharSet kFloating =
-      FormatConversionCharSetUnion(a, e, f, g, A, E, F, G);
-  static constexpr FormatConversionCharSet kNumeric =
-      FormatConversionCharSetUnion(kIntegral, kFloating);
-  static constexpr FormatConversionCharSet kPointer = p;
-};
-
-// Type safe OR operator.
-// We need this for two reasons:
-//  1. operator| on enums makes them decay to integers and the result is an
-//     integer. We need the result to stay as an enum.
-//  2. We use "enum class" which would not work even if we accepted the decay.
-constexpr FormatConversionCharSet operator|(FormatConversionCharSet a,
-                                            FormatConversionCharSet b) {
-  return FormatConversionCharSetUnion(a, b);
-}
-
-// Overloaded conversion functions to support absl::ParsedFormat.
-// Get a conversion with a single character in it.
-constexpr FormatConversionCharSet ToFormatConversionCharSet(char c) {
-  return static_cast<FormatConversionCharSet>(
-      FormatConversionCharToConvValue(c));
-}
-
-// Get a conversion with a single character in it.
-constexpr FormatConversionCharSet ToFormatConversionCharSet(
-    FormatConversionCharSet c) {
-  return c;
-}
-
-template <typename T>
-void ToFormatConversionCharSet(T) = delete;
-
-// Checks whether `c` exists in `set`.
-constexpr bool Contains(FormatConversionCharSet set, char c) {
-  return (static_cast<uint64_t>(set) &
-          static_cast<uint64_t>(FormatConversionCharToConvValue(c))) != 0;
-}
-
-// Checks whether all the characters in `c` are contained in `set`
-constexpr bool Contains(FormatConversionCharSet set,
-                        FormatConversionCharSet c) {
-  return (static_cast<uint64_t>(set) & static_cast<uint64_t>(c)) ==
-         static_cast<uint64_t>(c);
-}
-
-// Checks whether all the characters in `c` are contained in `set`
-constexpr bool Contains(FormatConversionCharSet set, FormatConversionChar c) {
-  return (static_cast<uint64_t>(set) & FormatConversionCharToConvInt(c)) != 0;
-}
-
-// Return capacity - used, clipped to a minimum of 0.
-inline size_t Excess(size_t used, size_t capacity) {
-  return used < capacity ? capacity - used : 0;
-}
-
-}  // namespace str_format_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_EXTENSION_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/extension_test.cc b/third_party/abseil/absl/strings/internal/str_format/extension_test.cc
deleted file mode 100644
index 1c93fdb..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/extension_test.cc
+++ /dev/null
@@ -1,98 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#include "absl/strings/internal/str_format/extension.h"
-
-#include <random>
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/string_view.h"
-
-namespace my_namespace {
-class UserDefinedType {
- public:
-  UserDefinedType() = default;
-
-  void Append(absl::string_view str) { value_.append(str.data(), str.size()); }
-  const std::string& Value() const { return value_; }
-
-  friend void AbslFormatFlush(UserDefinedType* x, absl::string_view str) {
-    x->Append(str);
-  }
-
- private:
-  std::string value_;
-};
-}  // namespace my_namespace
-
-namespace {
-
-std::string MakeRandomString(size_t len) {
-  std::random_device rd;
-  std::mt19937 gen(rd());
-  std::uniform_int_distribution<> dis('a', 'z');
-  std::string s(len, '0');
-  for (char& c : s) {
-    c = dis(gen);
-  }
-  return s;
-}
-
-TEST(FormatExtensionTest, SinkAppendSubstring) {
-  for (size_t chunk_size : {1, 10, 100, 1000, 10000}) {
-    std::string expected, actual;
-    absl::str_format_internal::FormatSinkImpl sink(&actual);
-    for (size_t chunks = 0; chunks < 10; ++chunks) {
-      std::string rand = MakeRandomString(chunk_size);
-      expected += rand;
-      sink.Append(rand);
-    }
-    sink.Flush();
-    EXPECT_EQ(actual, expected);
-  }
-}
-
-TEST(FormatExtensionTest, SinkAppendChars) {
-  for (size_t chunk_size : {1, 10, 100, 1000, 10000}) {
-    std::string expected, actual;
-    absl::str_format_internal::FormatSinkImpl sink(&actual);
-    for (size_t chunks = 0; chunks < 10; ++chunks) {
-      std::string rand = MakeRandomString(1);
-      expected.append(chunk_size, rand[0]);
-      sink.Append(chunk_size, rand[0]);
-    }
-    sink.Flush();
-    EXPECT_EQ(actual, expected);
-  }
-}
-
-TEST(FormatExtensionTest, VerifyEnumEquality) {
-#define X_VAL(id)                           \
-  EXPECT_EQ(absl::FormatConversionChar::id, \
-            absl::str_format_internal::FormatConversionCharInternal::id);
-  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(X_VAL, );
-#undef X_VAL
-
-#define X_VAL(id)                              \
-  EXPECT_EQ(absl::FormatConversionCharSet::id, \
-            absl::str_format_internal::FormatConversionCharSetInternal::id);
-  ABSL_INTERNAL_CONVERSION_CHARS_EXPAND_(X_VAL, );
-#undef X_VAL
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/str_format/float_conversion.cc b/third_party/abseil/absl/strings/internal/str_format/float_conversion.cc
deleted file mode 100644
index 2aa41aa..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/float_conversion.cc
+++ /dev/null
@@ -1,1418 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/float_conversion.h"
-
-#include <string.h>
-
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <limits>
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/optimization.h"
-#include "absl/functional/function_ref.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/bits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/numbers.h"
-#include "absl/types/optional.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-namespace {
-
-// The code below wants to avoid heap allocations.
-// To do so it needs to allocate memory on the stack.
-// `StackArray` will allocate memory on the stack in the form of a uint32_t
-// array and call the provided callback with said memory.
-// It will allocate memory in increments of 512 bytes. We could allocate the
-// largest needed unconditionally, but that is more than we need in most of
-// cases. This way we use less stack in the common cases.
-class StackArray {
-  using Func = absl::FunctionRef<void(absl::Span<uint32_t>)>;
-  static constexpr size_t kStep = 512 / sizeof(uint32_t);
-  // 5 steps is 2560 bytes, which is enough to hold a long double with the
-  // largest/smallest exponents.
-  // The operations below will static_assert their particular maximum.
-  static constexpr size_t kNumSteps = 5;
-
-  // We do not want this function to be inlined.
-  // Otherwise the caller will allocate the stack space unnecessarily for all
-  // the variants even though it only calls one.
-  template <size_t steps>
-  ABSL_ATTRIBUTE_NOINLINE static void RunWithCapacityImpl(Func f) {
-    uint32_t values[steps * kStep]{};
-    f(absl::MakeSpan(values));
-  }
-
- public:
-  static constexpr size_t kMaxCapacity = kStep * kNumSteps;
-
-  static void RunWithCapacity(size_t capacity, Func f) {
-    assert(capacity <= kMaxCapacity);
-    const size_t step = (capacity + kStep - 1) / kStep;
-    assert(step <= kNumSteps);
-    switch (step) {
-      case 1:
-        return RunWithCapacityImpl<1>(f);
-      case 2:
-        return RunWithCapacityImpl<2>(f);
-      case 3:
-        return RunWithCapacityImpl<3>(f);
-      case 4:
-        return RunWithCapacityImpl<4>(f);
-      case 5:
-        return RunWithCapacityImpl<5>(f);
-    }
-
-    assert(false && "Invalid capacity");
-  }
-};
-
-// Calculates `10 * (*v) + carry` and stores the result in `*v` and returns
-// the carry.
-template <typename Int>
-inline Int MultiplyBy10WithCarry(Int *v, Int carry) {
-  using BiggerInt = absl::conditional_t<sizeof(Int) == 4, uint64_t, uint128>;
-  BiggerInt tmp = 10 * static_cast<BiggerInt>(*v) + carry;
-  *v = static_cast<Int>(tmp);
-  return static_cast<Int>(tmp >> (sizeof(Int) * 8));
-}
-
-// Calculates `(2^64 * carry + *v) / 10`.
-// Stores the quotient in `*v` and returns the remainder.
-// Requires: `0 <= carry <= 9`
-inline uint64_t DivideBy10WithCarry(uint64_t *v, uint64_t carry) {
-  constexpr uint64_t divisor = 10;
-  // 2^64 / divisor = chunk_quotient + chunk_remainder / divisor
-  constexpr uint64_t chunk_quotient = (uint64_t{1} << 63) / (divisor / 2);
-  constexpr uint64_t chunk_remainder = uint64_t{} - chunk_quotient * divisor;
-
-  const uint64_t mod = *v % divisor;
-  const uint64_t next_carry = chunk_remainder * carry + mod;
-  *v = *v / divisor + carry * chunk_quotient + next_carry / divisor;
-  return next_carry % divisor;
-}
-
-// Generates the decimal representation for an integer of the form `v * 2^exp`,
-// where `v` and `exp` are both positive integers.
-// It generates the digits from the left (ie the most significant digit first)
-// to allow for direct printing into the sink.
-//
-// Requires `0 <= exp` and `exp <= numeric_limits<long double>::max_exponent`.
-class BinaryToDecimal {
-  static constexpr int ChunksNeeded(int exp) {
-    // We will left shift a uint128 by `exp` bits, so we need `128+exp` total
-    // bits. Round up to 32.
-    // See constructor for details about adding `10%` to the value.
-    return (128 + exp + 31) / 32 * 11 / 10;
-  }
-
- public:
-  // Run the conversion for `v * 2^exp` and call `f(binary_to_decimal)`.
-  // This function will allocate enough stack space to perform the conversion.
-  static void RunConversion(uint128 v, int exp,
-                            absl::FunctionRef<void(BinaryToDecimal)> f) {
-    assert(exp > 0);
-    assert(exp <= std::numeric_limits<long double>::max_exponent);
-    static_assert(
-        static_cast<int>(StackArray::kMaxCapacity) >=
-            ChunksNeeded(std::numeric_limits<long double>::max_exponent),
-        "");
-
-    StackArray::RunWithCapacity(
-        ChunksNeeded(exp),
-        [=](absl::Span<uint32_t> input) { f(BinaryToDecimal(input, v, exp)); });
-  }
-
-  int TotalDigits() const {
-    return static_cast<int>((decimal_end_ - decimal_start_) * kDigitsPerChunk +
-                            CurrentDigits().size());
-  }
-
-  // See the current block of digits.
-  absl::string_view CurrentDigits() const {
-    return absl::string_view(digits_ + kDigitsPerChunk - size_, size_);
-  }
-
-  // Advance the current view of digits.
-  // Returns `false` when no more digits are available.
-  bool AdvanceDigits() {
-    if (decimal_start_ >= decimal_end_) return false;
-
-    uint32_t w = data_[decimal_start_++];
-    for (size_ = 0; size_ < kDigitsPerChunk; w /= 10) {
-      digits_[kDigitsPerChunk - ++size_] = w % 10 + '0';
-    }
-    return true;
-  }
-
- private:
-  BinaryToDecimal(absl::Span<uint32_t> data, uint128 v, int exp) : data_(data) {
-    // We need to print the digits directly into the sink object without
-    // buffering them all first. To do this we need two things:
-    // - to know the total number of digits to do padding when necessary
-    // - to generate the decimal digits from the left.
-    //
-    // In order to do this, we do a two pass conversion.
-    // On the first pass we convert the binary representation of the value into
-    // a decimal representation in which each uint32_t chunk holds up to 9
-    // decimal digits.  In the second pass we take each decimal-holding-uint32_t
-    // value and generate the ascii decimal digits into `digits_`.
-    //
-    // The binary and decimal representations actually share the same memory
-    // region. As we go converting the chunks from binary to decimal we free
-    // them up and reuse them for the decimal representation. One caveat is that
-    // the decimal representation is around 7% less efficient in space than the
-    // binary one. We allocate an extra 10% memory to account for this. See
-    // ChunksNeeded for this calculation.
-    int chunk_index = exp / 32;
-    decimal_start_ = decimal_end_ = ChunksNeeded(exp);
-    const int offset = exp % 32;
-    // Left shift v by exp bits.
-    data_[chunk_index] = static_cast<uint32_t>(v << offset);
-    for (v >>= (32 - offset); v; v >>= 32)
-      data_[++chunk_index] = static_cast<uint32_t>(v);
-
-    while (chunk_index >= 0) {
-      // While we have more than one chunk available, go in steps of 1e9.
-      // `data_[chunk_index]` holds the highest non-zero binary chunk, so keep
-      // the variable updated.
-      uint32_t carry = 0;
-      for (int i = chunk_index; i >= 0; --i) {
-        uint64_t tmp = uint64_t{data_[i]} + (uint64_t{carry} << 32);
-        data_[i] = static_cast<uint32_t>(tmp / uint64_t{1000000000});
-        carry = static_cast<uint32_t>(tmp % uint64_t{1000000000});
-      }
-
-      // If the highest chunk is now empty, remove it from view.
-      if (data_[chunk_index] == 0) --chunk_index;
-
-      --decimal_start_;
-      assert(decimal_start_ != chunk_index);
-      data_[decimal_start_] = carry;
-    }
-
-    // Fill the first set of digits. The first chunk might not be complete, so
-    // handle differently.
-    for (uint32_t first = data_[decimal_start_++]; first != 0; first /= 10) {
-      digits_[kDigitsPerChunk - ++size_] = first % 10 + '0';
-    }
-  }
-
- private:
-  static constexpr int kDigitsPerChunk = 9;
-
-  int decimal_start_;
-  int decimal_end_;
-
-  char digits_[kDigitsPerChunk];
-  int size_ = 0;
-
-  absl::Span<uint32_t> data_;
-};
-
-// Converts a value of the form `x * 2^-exp` into a sequence of decimal digits.
-// Requires `-exp < 0` and
-// `-exp >= limits<long double>::min_exponent - limits<long double>::digits`.
-class FractionalDigitGenerator {
- public:
-  // Run the conversion for `v * 2^exp` and call `f(generator)`.
-  // This function will allocate enough stack space to perform the conversion.
-  static void RunConversion(
-      uint128 v, int exp, absl::FunctionRef<void(FractionalDigitGenerator)> f) {
-    using Limits = std::numeric_limits<long double>;
-    assert(-exp < 0);
-    assert(-exp >= Limits::min_exponent - 128);
-    static_assert(StackArray::kMaxCapacity >=
-                      (Limits::digits + 128 - Limits::min_exponent + 31) / 32,
-                  "");
-    StackArray::RunWithCapacity((Limits::digits + exp + 31) / 32,
-                                [=](absl::Span<uint32_t> input) {
-                                  f(FractionalDigitGenerator(input, v, exp));
-                                });
-  }
-
-  // Returns true if there are any more non-zero digits left.
-  bool HasMoreDigits() const { return next_digit_ != 0 || chunk_index_ >= 0; }
-
-  // Returns true if the remainder digits are greater than 5000...
-  bool IsGreaterThanHalf() const {
-    return next_digit_ > 5 || (next_digit_ == 5 && chunk_index_ >= 0);
-  }
-  // Returns true if the remainder digits are exactly 5000...
-  bool IsExactlyHalf() const { return next_digit_ == 5 && chunk_index_ < 0; }
-
-  struct Digits {
-    int digit_before_nine;
-    int num_nines;
-  };
-
-  // Get the next set of digits.
-  // They are composed by a non-9 digit followed by a runs of zero or more 9s.
-  Digits GetDigits() {
-    Digits digits{next_digit_, 0};
-
-    next_digit_ = GetOneDigit();
-    while (next_digit_ == 9) {
-      ++digits.num_nines;
-      next_digit_ = GetOneDigit();
-    }
-
-    return digits;
-  }
-
- private:
-  // Return the next digit.
-  int GetOneDigit() {
-    if (chunk_index_ < 0) return 0;
-
-    uint32_t carry = 0;
-    for (int i = chunk_index_; i >= 0; --i) {
-      carry = MultiplyBy10WithCarry(&data_[i], carry);
-    }
-    // If the lowest chunk is now empty, remove it from view.
-    if (data_[chunk_index_] == 0) --chunk_index_;
-    return carry;
-  }
-
-  FractionalDigitGenerator(absl::Span<uint32_t> data, uint128 v, int exp)
-      : chunk_index_(exp / 32), data_(data) {
-    const int offset = exp % 32;
-    // Right shift `v` by `exp` bits.
-    data_[chunk_index_] = static_cast<uint32_t>(v << (32 - offset));
-    v >>= offset;
-    // Make sure we don't overflow the data. We already calculated that
-    // non-zero bits fit, so we might not have space for leading zero bits.
-    for (int pos = chunk_index_; v; v >>= 32)
-      data_[--pos] = static_cast<uint32_t>(v);
-
-    // Fill next_digit_, as GetDigits expects it to be populated always.
-    next_digit_ = GetOneDigit();
-  }
-
-  int next_digit_;
-  int chunk_index_;
-  absl::Span<uint32_t> data_;
-};
-
-// Count the number of leading zero bits.
-int LeadingZeros(uint64_t v) { return countl_zero(v); }
-int LeadingZeros(uint128 v) {
-  auto high = static_cast<uint64_t>(v >> 64);
-  auto low = static_cast<uint64_t>(v);
-  return high != 0 ? countl_zero(high) : 64 + countl_zero(low);
-}
-
-// Round up the text digits starting at `p`.
-// The buffer must have an extra digit that is known to not need rounding.
-// This is done below by having an extra '0' digit on the left.
-void RoundUp(char *p) {
-  while (*p == '9' || *p == '.') {
-    if (*p == '9') *p = '0';
-    --p;
-  }
-  ++*p;
-}
-
-// Check the previous digit and round up or down to follow the round-to-even
-// policy.
-void RoundToEven(char *p) {
-  if (*p == '.') --p;
-  if (*p % 2 == 1) RoundUp(p);
-}
-
-// Simple integral decimal digit printing for values that fit in 64-bits.
-// Returns the pointer to the last written digit.
-char *PrintIntegralDigitsFromRightFast(uint64_t v, char *p) {
-  do {
-    *--p = DivideBy10WithCarry(&v, 0) + '0';
-  } while (v != 0);
-  return p;
-}
-
-// Simple integral decimal digit printing for values that fit in 128-bits.
-// Returns the pointer to the last written digit.
-char *PrintIntegralDigitsFromRightFast(uint128 v, char *p) {
-  auto high = static_cast<uint64_t>(v >> 64);
-  auto low = static_cast<uint64_t>(v);
-
-  while (high != 0) {
-    uint64_t carry = DivideBy10WithCarry(&high, 0);
-    carry = DivideBy10WithCarry(&low, carry);
-    *--p = carry + '0';
-  }
-  return PrintIntegralDigitsFromRightFast(low, p);
-}
-
-// Simple fractional decimal digit printing for values that fir in 64-bits after
-// shifting.
-// Performs rounding if necessary to fit within `precision`.
-// Returns the pointer to one after the last character written.
-char *PrintFractionalDigitsFast(uint64_t v, char *start, int exp,
-                                int precision) {
-  char *p = start;
-  v <<= (64 - exp);
-  while (precision > 0) {
-    if (!v) return p;
-    *p++ = MultiplyBy10WithCarry(&v, uint64_t{0}) + '0';
-    --precision;
-  }
-
-  // We need to round.
-  if (v < 0x8000000000000000) {
-    // We round down, so nothing to do.
-  } else if (v > 0x8000000000000000) {
-    // We round up.
-    RoundUp(p - 1);
-  } else {
-    RoundToEven(p - 1);
-  }
-
-  assert(precision == 0);
-  // Precision can only be zero here.
-  return p;
-}
-
-// Simple fractional decimal digit printing for values that fir in 128-bits
-// after shifting.
-// Performs rounding if necessary to fit within `precision`.
-// Returns the pointer to one after the last character written.
-char *PrintFractionalDigitsFast(uint128 v, char *start, int exp,
-                                int precision) {
-  char *p = start;
-  v <<= (128 - exp);
-  auto high = static_cast<uint64_t>(v >> 64);
-  auto low = static_cast<uint64_t>(v);
-
-  // While we have digits to print and `low` is not empty, do the long
-  // multiplication.
-  while (precision > 0 && low != 0) {
-    uint64_t carry = MultiplyBy10WithCarry(&low, uint64_t{0});
-    carry = MultiplyBy10WithCarry(&high, carry);
-
-    *p++ = carry + '0';
-    --precision;
-  }
-
-  // Now `low` is empty, so use a faster approach for the rest of the digits.
-  // This block is pretty much the same as the main loop for the 64-bit case
-  // above.
-  while (precision > 0) {
-    if (!high) return p;
-    *p++ = MultiplyBy10WithCarry(&high, uint64_t{0}) + '0';
-    --precision;
-  }
-
-  // We need to round.
-  if (high < 0x8000000000000000) {
-    // We round down, so nothing to do.
-  } else if (high > 0x8000000000000000 || low != 0) {
-    // We round up.
-    RoundUp(p - 1);
-  } else {
-    RoundToEven(p - 1);
-  }
-
-  assert(precision == 0);
-  // Precision can only be zero here.
-  return p;
-}
-
-struct FormatState {
-  char sign_char;
-  int precision;
-  const FormatConversionSpecImpl &conv;
-  FormatSinkImpl *sink;
-
-  // In `alt` mode (flag #) we keep the `.` even if there are no fractional
-  // digits. In non-alt mode, we strip it.
-  bool ShouldPrintDot() const { return precision != 0 || conv.has_alt_flag(); }
-};
-
-struct Padding {
-  int left_spaces;
-  int zeros;
-  int right_spaces;
-};
-
-Padding ExtraWidthToPadding(size_t total_size, const FormatState &state) {
-  if (state.conv.width() < 0 ||
-      static_cast<size_t>(state.conv.width()) <= total_size) {
-    return {0, 0, 0};
-  }
-  int missing_chars = state.conv.width() - total_size;
-  if (state.conv.has_left_flag()) {
-    return {0, 0, missing_chars};
-  } else if (state.conv.has_zero_flag()) {
-    return {0, missing_chars, 0};
-  } else {
-    return {missing_chars, 0, 0};
-  }
-}
-
-void FinalPrint(const FormatState &state, absl::string_view data,
-                int padding_offset, int trailing_zeros,
-                absl::string_view data_postfix) {
-  if (state.conv.width() < 0) {
-    // No width specified. Fast-path.
-    if (state.sign_char != '\0') state.sink->Append(1, state.sign_char);
-    state.sink->Append(data);
-    state.sink->Append(trailing_zeros, '0');
-    state.sink->Append(data_postfix);
-    return;
-  }
-
-  auto padding = ExtraWidthToPadding((state.sign_char != '\0' ? 1 : 0) +
-                                         data.size() + data_postfix.size() +
-                                         static_cast<size_t>(trailing_zeros),
-                                     state);
-
-  state.sink->Append(padding.left_spaces, ' ');
-  if (state.sign_char != '\0') state.sink->Append(1, state.sign_char);
-  // Padding in general needs to be inserted somewhere in the middle of `data`.
-  state.sink->Append(data.substr(0, padding_offset));
-  state.sink->Append(padding.zeros, '0');
-  state.sink->Append(data.substr(padding_offset));
-  state.sink->Append(trailing_zeros, '0');
-  state.sink->Append(data_postfix);
-  state.sink->Append(padding.right_spaces, ' ');
-}
-
-// Fastpath %f formatter for when the shifted value fits in a simple integral
-// type.
-// Prints `v*2^exp` with the options from `state`.
-template <typename Int>
-void FormatFFast(Int v, int exp, const FormatState &state) {
-  constexpr int input_bits = sizeof(Int) * 8;
-
-  static constexpr size_t integral_size =
-      /* in case we need to round up an extra digit */ 1 +
-      /* decimal digits for uint128 */ 40 + 1;
-  char buffer[integral_size + /* . */ 1 + /* max digits uint128 */ 128];
-  buffer[integral_size] = '.';
-  char *const integral_digits_end = buffer + integral_size;
-  char *integral_digits_start;
-  char *const fractional_digits_start = buffer + integral_size + 1;
-  char *fractional_digits_end = fractional_digits_start;
-
-  if (exp >= 0) {
-    const int total_bits = input_bits - LeadingZeros(v) + exp;
-    integral_digits_start =
-        total_bits <= 64
-            ? PrintIntegralDigitsFromRightFast(static_cast<uint64_t>(v) << exp,
-                                               integral_digits_end)
-            : PrintIntegralDigitsFromRightFast(static_cast<uint128>(v) << exp,
-                                               integral_digits_end);
-  } else {
-    exp = -exp;
-
-    integral_digits_start = PrintIntegralDigitsFromRightFast(
-        exp < input_bits ? v >> exp : 0, integral_digits_end);
-    // PrintFractionalDigits may pull a carried 1 all the way up through the
-    // integral portion.
-    integral_digits_start[-1] = '0';
-
-    fractional_digits_end =
-        exp <= 64 ? PrintFractionalDigitsFast(v, fractional_digits_start, exp,
-                                              state.precision)
-                  : PrintFractionalDigitsFast(static_cast<uint128>(v),
-                                              fractional_digits_start, exp,
-                                              state.precision);
-    // There was a carry, so include the first digit too.
-    if (integral_digits_start[-1] != '0') --integral_digits_start;
-  }
-
-  size_t size = fractional_digits_end - integral_digits_start;
-
-  // In `alt` mode (flag #) we keep the `.` even if there are no fractional
-  // digits. In non-alt mode, we strip it.
-  if (!state.ShouldPrintDot()) --size;
-  FinalPrint(state, absl::string_view(integral_digits_start, size),
-             /*padding_offset=*/0,
-             static_cast<int>(state.precision - (fractional_digits_end -
-                                                 fractional_digits_start)),
-             /*data_postfix=*/"");
-}
-
-// Slow %f formatter for when the shifted value does not fit in a uint128, and
-// `exp > 0`.
-// Prints `v*2^exp` with the options from `state`.
-// This one is guaranteed to not have fractional digits, so we don't have to
-// worry about anything after the `.`.
-void FormatFPositiveExpSlow(uint128 v, int exp, const FormatState &state) {
-  BinaryToDecimal::RunConversion(v, exp, [&](BinaryToDecimal btd) {
-    const size_t total_digits =
-        btd.TotalDigits() +
-        (state.ShouldPrintDot() ? static_cast<size_t>(state.precision) + 1 : 0);
-
-    const auto padding = ExtraWidthToPadding(
-        total_digits + (state.sign_char != '\0' ? 1 : 0), state);
-
-    state.sink->Append(padding.left_spaces, ' ');
-    if (state.sign_char != '\0') state.sink->Append(1, state.sign_char);
-    state.sink->Append(padding.zeros, '0');
-
-    do {
-      state.sink->Append(btd.CurrentDigits());
-    } while (btd.AdvanceDigits());
-
-    if (state.ShouldPrintDot()) state.sink->Append(1, '.');
-    state.sink->Append(state.precision, '0');
-    state.sink->Append(padding.right_spaces, ' ');
-  });
-}
-
-// Slow %f formatter for when the shifted value does not fit in a uint128, and
-// `exp < 0`.
-// Prints `v*2^exp` with the options from `state`.
-// This one is guaranteed to be < 1.0, so we don't have to worry about integral
-// digits.
-void FormatFNegativeExpSlow(uint128 v, int exp, const FormatState &state) {
-  const size_t total_digits =
-      /* 0 */ 1 +
-      (state.ShouldPrintDot() ? static_cast<size_t>(state.precision) + 1 : 0);
-  auto padding =
-      ExtraWidthToPadding(total_digits + (state.sign_char ? 1 : 0), state);
-  padding.zeros += 1;
-  state.sink->Append(padding.left_spaces, ' ');
-  if (state.sign_char != '\0') state.sink->Append(1, state.sign_char);
-  state.sink->Append(padding.zeros, '0');
-
-  if (state.ShouldPrintDot()) state.sink->Append(1, '.');
-
-  // Print digits
-  int digits_to_go = state.precision;
-
-  FractionalDigitGenerator::RunConversion(
-      v, exp, [&](FractionalDigitGenerator digit_gen) {
-        // There are no digits to print here.
-        if (state.precision == 0) return;
-
-        // We go one digit at a time, while keeping track of runs of nines.
-        // The runs of nines are used to perform rounding when necessary.
-
-        while (digits_to_go > 0 && digit_gen.HasMoreDigits()) {
-          auto digits = digit_gen.GetDigits();
-
-          // Now we have a digit and a run of nines.
-          // See if we can print them all.
-          if (digits.num_nines + 1 < digits_to_go) {
-            // We don't have to round yet, so print them.
-            state.sink->Append(1, digits.digit_before_nine + '0');
-            state.sink->Append(digits.num_nines, '9');
-            digits_to_go -= digits.num_nines + 1;
-
-          } else {
-            // We can't print all the nines, see where we have to truncate.
-
-            bool round_up = false;
-            if (digits.num_nines + 1 > digits_to_go) {
-              // We round up at a nine. No need to print them.
-              round_up = true;
-            } else {
-              // We can fit all the nines, but truncate just after it.
-              if (digit_gen.IsGreaterThanHalf()) {
-                round_up = true;
-              } else if (digit_gen.IsExactlyHalf()) {
-                // Round to even
-                round_up =
-                    digits.num_nines != 0 || digits.digit_before_nine % 2 == 1;
-              }
-            }
-
-            if (round_up) {
-              state.sink->Append(1, digits.digit_before_nine + '1');
-              --digits_to_go;
-              // The rest will be zeros.
-            } else {
-              state.sink->Append(1, digits.digit_before_nine + '0');
-              state.sink->Append(digits_to_go - 1, '9');
-              digits_to_go = 0;
-            }
-            return;
-          }
-        }
-      });
-
-  state.sink->Append(digits_to_go, '0');
-  state.sink->Append(padding.right_spaces, ' ');
-}
-
-template <typename Int>
-void FormatF(Int mantissa, int exp, const FormatState &state) {
-  if (exp >= 0) {
-    const int total_bits = sizeof(Int) * 8 - LeadingZeros(mantissa) + exp;
-
-    // Fallback to the slow stack-based approach if we can't do it in a 64 or
-    // 128 bit state.
-    if (ABSL_PREDICT_FALSE(total_bits > 128)) {
-      return FormatFPositiveExpSlow(mantissa, exp, state);
-    }
-  } else {
-    // Fallback to the slow stack-based approach if we can't do it in a 64 or
-    // 128 bit state.
-    if (ABSL_PREDICT_FALSE(exp < -128)) {
-      return FormatFNegativeExpSlow(mantissa, -exp, state);
-    }
-  }
-  return FormatFFast(mantissa, exp, state);
-}
-
-// Grab the group of four bits (nibble) from `n`. E.g., nibble 1 corresponds to
-// bits 4-7.
-template <typename Int>
-uint8_t GetNibble(Int n, int nibble_index) {
-  constexpr Int mask_low_nibble = Int{0xf};
-  int shift = nibble_index * 4;
-  n &= mask_low_nibble << shift;
-  return static_cast<uint8_t>((n >> shift) & 0xf);
-}
-
-// Add one to the given nibble, applying carry to higher nibbles. Returns true
-// if overflow, false otherwise.
-template <typename Int>
-bool IncrementNibble(int nibble_index, Int *n) {
-  constexpr int kShift = sizeof(Int) * 8 - 1;
-  constexpr int kNumNibbles = sizeof(Int) * 8 / 4;
-  Int before = *n >> kShift;
-  // Here we essentially want to take the number 1 and move it into the requsted
-  // nibble, then add it to *n to effectively increment the nibble. However,
-  // ASan will complain if we try to shift the 1 beyond the limits of the Int,
-  // i.e., if the nibble_index is out of range. So therefore we check for this
-  // and if we are out of range we just add 0 which leaves *n unchanged, which
-  // seems like the reasonable thing to do in that case.
-  *n += ((nibble_index >= kNumNibbles) ? 0 : (Int{1} << (nibble_index * 4)));
-  Int after = *n >> kShift;
-  return (before && !after) || (nibble_index >= kNumNibbles);
-}
-
-// Return a mask with 1's in the given nibble and all lower nibbles.
-template <typename Int>
-Int MaskUpToNibbleInclusive(int nibble_index) {
-  constexpr int kNumNibbles = sizeof(Int) * 8 / 4;
-  static const Int ones = ~Int{0};
-  return ones >> std::max(0, 4 * (kNumNibbles - nibble_index - 1));
-}
-
-// Return a mask with 1's below the given nibble.
-template <typename Int>
-Int MaskUpToNibbleExclusive(int nibble_index) {
-  return nibble_index <= 0 ? 0 : MaskUpToNibbleInclusive<Int>(nibble_index - 1);
-}
-
-template <typename Int>
-Int MoveToNibble(uint8_t nibble, int nibble_index) {
-  return Int{nibble} << (4 * nibble_index);
-}
-
-// Given mantissa size, find optimal # of mantissa bits to put in initial digit.
-//
-// In the hex representation we keep a single hex digit to the left of the dot.
-// However, the question as to how many bits of the mantissa should be put into
-// that hex digit in theory is arbitrary, but in practice it is optimal to
-// choose based on the size of the mantissa. E.g., for a `double`, there are 53
-// mantissa bits, so that means that we should put 1 bit to the left of the dot,
-// thereby leaving 52 bits to the right, which is evenly divisible by four and
-// thus all fractional digits represent actual precision. For a `long double`,
-// on the other hand, there are 64 bits of mantissa, thus we can use all four
-// bits for the initial hex digit and still have a number left over (60) that is
-// a multiple of four. Once again, the goal is to have all fractional digits
-// represent real precision.
-template <typename Float>
-constexpr int HexFloatLeadingDigitSizeInBits() {
-  return std::numeric_limits<Float>::digits % 4 > 0
-             ? std::numeric_limits<Float>::digits % 4
-             : 4;
-}
-
-// This function captures the rounding behavior of glibc for hex float
-// representations. E.g. when rounding 0x1.ab800000 to a precision of .2
-// ("%.2a") glibc will round up because it rounds toward the even number (since
-// 0xb is an odd number, it will round up to 0xc). However, when rounding at a
-// point that is not followed by 800000..., it disregards the parity and rounds
-// up if > 8 and rounds down if < 8.
-template <typename Int>
-bool HexFloatNeedsRoundUp(Int mantissa, int final_nibble_displayed,
-                          uint8_t leading) {
-  // If the last nibble (hex digit) to be displayed is the lowest on in the
-  // mantissa then that means that we don't have any further nibbles to inform
-  // rounding, so don't round.
-  if (final_nibble_displayed <= 0) {
-    return false;
-  }
-  int rounding_nibble_idx = final_nibble_displayed - 1;
-  constexpr int kTotalNibbles = sizeof(Int) * 8 / 4;
-  assert(final_nibble_displayed <= kTotalNibbles);
-  Int mantissa_up_to_rounding_nibble_inclusive =
-      mantissa & MaskUpToNibbleInclusive<Int>(rounding_nibble_idx);
-  Int eight = MoveToNibble<Int>(8, rounding_nibble_idx);
-  if (mantissa_up_to_rounding_nibble_inclusive != eight) {
-    return mantissa_up_to_rounding_nibble_inclusive > eight;
-  }
-  // Nibble in question == 8.
-  uint8_t round_if_odd = (final_nibble_displayed == kTotalNibbles)
-                             ? leading
-                             : GetNibble(mantissa, final_nibble_displayed);
-  return round_if_odd % 2 == 1;
-}
-
-// Stores values associated with a Float type needed by the FormatA
-// implementation in order to avoid templatizing that function by the Float
-// type.
-struct HexFloatTypeParams {
-  template <typename Float>
-  explicit HexFloatTypeParams(Float)
-      : min_exponent(std::numeric_limits<Float>::min_exponent - 1),
-        leading_digit_size_bits(HexFloatLeadingDigitSizeInBits<Float>()) {
-    assert(leading_digit_size_bits >= 1 && leading_digit_size_bits <= 4);
-  }
-
-  int min_exponent;
-  int leading_digit_size_bits;
-};
-
-// Hex Float Rounding. First check if we need to round; if so, then we do that
-// by manipulating (incrementing) the mantissa, that way we can later print the
-// mantissa digits by iterating through them in the same way regardless of
-// whether a rounding happened.
-template <typename Int>
-void FormatARound(bool precision_specified, const FormatState &state,
-                  uint8_t *leading, Int *mantissa, int *exp) {
-  constexpr int kTotalNibbles = sizeof(Int) * 8 / 4;
-  // Index of the last nibble that we could display given precision.
-  int final_nibble_displayed =
-      precision_specified ? std::max(0, (kTotalNibbles - state.precision)) : 0;
-  if (HexFloatNeedsRoundUp(*mantissa, final_nibble_displayed, *leading)) {
-    // Need to round up.
-    bool overflow = IncrementNibble(final_nibble_displayed, mantissa);
-    *leading += (overflow ? 1 : 0);
-    if (ABSL_PREDICT_FALSE(*leading > 15)) {
-      // We have overflowed the leading digit. This would mean that we would
-      // need two hex digits to the left of the dot, which is not allowed. So
-      // adjust the mantissa and exponent so that the result is always 1.0eXXX.
-      *leading = 1;
-      *mantissa = 0;
-      *exp += 4;
-    }
-  }
-  // Now that we have handled a possible round-up we can go ahead and zero out
-  // all the nibbles of the mantissa that we won't need.
-  if (precision_specified) {
-    *mantissa &= ~MaskUpToNibbleExclusive<Int>(final_nibble_displayed);
-  }
-}
-
-template <typename Int>
-void FormatANormalize(const HexFloatTypeParams float_traits, uint8_t *leading,
-                      Int *mantissa, int *exp) {
-  constexpr int kIntBits = sizeof(Int) * 8;
-  static const Int kHighIntBit = Int{1} << (kIntBits - 1);
-  const int kLeadDigitBitsCount = float_traits.leading_digit_size_bits;
-  // Normalize mantissa so that highest bit set is in MSB position, unless we
-  // get interrupted by the exponent threshold.
-  while (*mantissa && !(*mantissa & kHighIntBit)) {
-    if (ABSL_PREDICT_FALSE(*exp - 1 < float_traits.min_exponent)) {
-      *mantissa >>= (float_traits.min_exponent - *exp);
-      *exp = float_traits.min_exponent;
-      return;
-    }
-    *mantissa <<= 1;
-    --*exp;
-  }
-  // Extract bits for leading digit then shift them away leaving the
-  // fractional part.
-  *leading =
-      static_cast<uint8_t>(*mantissa >> (kIntBits - kLeadDigitBitsCount));
-  *exp -= (*mantissa != 0) ? kLeadDigitBitsCount : *exp;
-  *mantissa <<= kLeadDigitBitsCount;
-}
-
-template <typename Int>
-void FormatA(const HexFloatTypeParams float_traits, Int mantissa, int exp,
-             bool uppercase, const FormatState &state) {
-  // Int properties.
-  constexpr int kIntBits = sizeof(Int) * 8;
-  constexpr int kTotalNibbles = sizeof(Int) * 8 / 4;
-  // Did the user specify a precision explicitly?
-  const bool precision_specified = state.conv.precision() >= 0;
-
-  // ========== Normalize/Denormalize ==========
-  exp += kIntBits;  // make all digits fractional digits.
-  // This holds the (up to four) bits of leading digit, i.e., the '1' in the
-  // number 0x1.e6fp+2. It's always > 0 unless number is zero or denormal.
-  uint8_t leading = 0;
-  FormatANormalize(float_traits, &leading, &mantissa, &exp);
-
-  // =============== Rounding ==================
-  // Check if we need to round; if so, then we do that by manipulating
-  // (incrementing) the mantissa before beginning to print characters.
-  FormatARound(precision_specified, state, &leading, &mantissa, &exp);
-
-  // ============= Format Result ===============
-  // This buffer holds the "0x1.ab1de3" portion of "0x1.ab1de3pe+2". Compute the
-  // size with long double which is the largest of the floats.
-  constexpr size_t kBufSizeForHexFloatRepr =
-      2                                               // 0x
-      + std::numeric_limits<long double>::digits / 4  // number of hex digits
-      + 1                                             // round up
-      + 1;                                            // "." (dot)
-  char digits_buffer[kBufSizeForHexFloatRepr];
-  char *digits_iter = digits_buffer;
-  const char *const digits =
-      static_cast<const char *>("0123456789ABCDEF0123456789abcdef") +
-      (uppercase ? 0 : 16);
-
-  // =============== Hex Prefix ================
-  *digits_iter++ = '0';
-  *digits_iter++ = uppercase ? 'X' : 'x';
-
-  // ========== Non-Fractional Digit ===========
-  *digits_iter++ = digits[leading];
-
-  // ================== Dot ====================
-  // There are three reasons we might need a dot. Keep in mind that, at this
-  // point, the mantissa holds only the fractional part.
-  if ((precision_specified && state.precision > 0) ||
-      (!precision_specified && mantissa > 0) || state.conv.has_alt_flag()) {
-    *digits_iter++ = '.';
-  }
-
-  // ============ Fractional Digits ============
-  int digits_emitted = 0;
-  while (mantissa > 0) {
-    *digits_iter++ = digits[GetNibble(mantissa, kTotalNibbles - 1)];
-    mantissa <<= 4;
-    ++digits_emitted;
-  }
-  int trailing_zeros =
-      precision_specified ? state.precision - digits_emitted : 0;
-  assert(trailing_zeros >= 0);
-  auto digits_result = string_view(digits_buffer, digits_iter - digits_buffer);
-
-  // =============== Exponent ==================
-  constexpr size_t kBufSizeForExpDecRepr =
-      numbers_internal::kFastToBufferSize  // requred for FastIntToBuffer
-      + 1                                  // 'p' or 'P'
-      + 1;                                 // '+' or '-'
-  char exp_buffer[kBufSizeForExpDecRepr];
-  exp_buffer[0] = uppercase ? 'P' : 'p';
-  exp_buffer[1] = exp >= 0 ? '+' : '-';
-  numbers_internal::FastIntToBuffer(exp < 0 ? -exp : exp, exp_buffer + 2);
-
-  // ============ Assemble Result ==============
-  FinalPrint(state,           //
-             digits_result,   // 0xN.NNN...
-             2,               // offset in `data` to start padding if needed.
-             trailing_zeros,  // num remaining mantissa padding zeros
-             exp_buffer);     // exponent
-}
-
-char *CopyStringTo(absl::string_view v, char *out) {
-  std::memcpy(out, v.data(), v.size());
-  return out + v.size();
-}
-
-template <typename Float>
-bool FallbackToSnprintf(const Float v, const FormatConversionSpecImpl &conv,
-                        FormatSinkImpl *sink) {
-  int w = conv.width() >= 0 ? conv.width() : 0;
-  int p = conv.precision() >= 0 ? conv.precision() : -1;
-  char fmt[32];
-  {
-    char *fp = fmt;
-    *fp++ = '%';
-    fp = CopyStringTo(FormatConversionSpecImplFriend::FlagsToString(conv), fp);
-    fp = CopyStringTo("*.*", fp);
-    if (std::is_same<long double, Float>()) {
-      *fp++ = 'L';
-    }
-    *fp++ = FormatConversionCharToChar(conv.conversion_char());
-    *fp = 0;
-    assert(fp < fmt + sizeof(fmt));
-  }
-  std::string space(512, '\0');
-  absl::string_view result;
-  while (true) {
-    int n = snprintf(&space[0], space.size(), fmt, w, p, v);
-    if (n < 0) return false;
-    if (static_cast<size_t>(n) < space.size()) {
-      result = absl::string_view(space.data(), n);
-      break;
-    }
-    space.resize(n + 1);
-  }
-  sink->Append(result);
-  return true;
-}
-
-// 128-bits in decimal: ceil(128*log(2)/log(10))
-//   or std::numeric_limits<__uint128_t>::digits10
-constexpr int kMaxFixedPrecision = 39;
-
-constexpr int kBufferLength = /*sign*/ 1 +
-                              /*integer*/ kMaxFixedPrecision +
-                              /*point*/ 1 +
-                              /*fraction*/ kMaxFixedPrecision +
-                              /*exponent e+123*/ 5;
-
-struct Buffer {
-  void push_front(char c) {
-    assert(begin > data);
-    *--begin = c;
-  }
-  void push_back(char c) {
-    assert(end < data + sizeof(data));
-    *end++ = c;
-  }
-  void pop_back() {
-    assert(begin < end);
-    --end;
-  }
-
-  char &back() {
-    assert(begin < end);
-    return end[-1];
-  }
-
-  char last_digit() const { return end[-1] == '.' ? end[-2] : end[-1]; }
-
-  int size() const { return static_cast<int>(end - begin); }
-
-  char data[kBufferLength];
-  char *begin;
-  char *end;
-};
-
-enum class FormatStyle { Fixed, Precision };
-
-// If the value is Inf or Nan, print it and return true.
-// Otherwise, return false.
-template <typename Float>
-bool ConvertNonNumericFloats(char sign_char, Float v,
-                             const FormatConversionSpecImpl &conv,
-                             FormatSinkImpl *sink) {
-  char text[4], *ptr = text;
-  if (sign_char != '\0') *ptr++ = sign_char;
-  if (std::isnan(v)) {
-    ptr = std::copy_n(
-        FormatConversionCharIsUpper(conv.conversion_char()) ? "NAN" : "nan", 3,
-        ptr);
-  } else if (std::isinf(v)) {
-    ptr = std::copy_n(
-        FormatConversionCharIsUpper(conv.conversion_char()) ? "INF" : "inf", 3,
-        ptr);
-  } else {
-    return false;
-  }
-
-  return sink->PutPaddedString(string_view(text, ptr - text), conv.width(), -1,
-                               conv.has_left_flag());
-}
-
-// Round up the last digit of the value.
-// It will carry over and potentially overflow. 'exp' will be adjusted in that
-// case.
-template <FormatStyle mode>
-void RoundUp(Buffer *buffer, int *exp) {
-  char *p = &buffer->back();
-  while (p >= buffer->begin && (*p == '9' || *p == '.')) {
-    if (*p == '9') *p = '0';
-    --p;
-  }
-
-  if (p < buffer->begin) {
-    *p = '1';
-    buffer->begin = p;
-    if (mode == FormatStyle::Precision) {
-      std::swap(p[1], p[2]);  // move the .
-      ++*exp;
-      buffer->pop_back();
-    }
-  } else {
-    ++*p;
-  }
-}
-
-void PrintExponent(int exp, char e, Buffer *out) {
-  out->push_back(e);
-  if (exp < 0) {
-    out->push_back('-');
-    exp = -exp;
-  } else {
-    out->push_back('+');
-  }
-  // Exponent digits.
-  if (exp > 99) {
-    out->push_back(exp / 100 + '0');
-    out->push_back(exp / 10 % 10 + '0');
-    out->push_back(exp % 10 + '0');
-  } else {
-    out->push_back(exp / 10 + '0');
-    out->push_back(exp % 10 + '0');
-  }
-}
-
-template <typename Float, typename Int>
-constexpr bool CanFitMantissa() {
-  return
-#if defined(__clang__) && !defined(__SSE3__)
-      // Workaround for clang bug: https://bugs.llvm.org/show_bug.cgi?id=38289
-      // Casting from long double to uint64_t is miscompiled and drops bits.
-      (!std::is_same<Float, long double>::value ||
-       !std::is_same<Int, uint64_t>::value) &&
-#endif
-      std::numeric_limits<Float>::digits <= std::numeric_limits<Int>::digits;
-}
-
-template <typename Float>
-struct Decomposed {
-  using MantissaType =
-      absl::conditional_t<std::is_same<long double, Float>::value, uint128,
-                          uint64_t>;
-  static_assert(std::numeric_limits<Float>::digits <= sizeof(MantissaType) * 8,
-                "");
-  MantissaType mantissa;
-  int exponent;
-};
-
-// Decompose the double into an integer mantissa and an exponent.
-template <typename Float>
-Decomposed<Float> Decompose(Float v) {
-  int exp;
-  Float m = std::frexp(v, &exp);
-  m = std::ldexp(m, std::numeric_limits<Float>::digits);
-  exp -= std::numeric_limits<Float>::digits;
-
-  return {static_cast<typename Decomposed<Float>::MantissaType>(m), exp};
-}
-
-// Print 'digits' as decimal.
-// In Fixed mode, we add a '.' at the end.
-// In Precision mode, we add a '.' after the first digit.
-template <FormatStyle mode, typename Int>
-int PrintIntegralDigits(Int digits, Buffer *out) {
-  int printed = 0;
-  if (digits) {
-    for (; digits; digits /= 10) out->push_front(digits % 10 + '0');
-    printed = out->size();
-    if (mode == FormatStyle::Precision) {
-      out->push_front(*out->begin);
-      out->begin[1] = '.';
-    } else {
-      out->push_back('.');
-    }
-  } else if (mode == FormatStyle::Fixed) {
-    out->push_front('0');
-    out->push_back('.');
-    printed = 1;
-  }
-  return printed;
-}
-
-// Back out 'extra_digits' digits and round up if necessary.
-bool RemoveExtraPrecision(int extra_digits, bool has_leftover_value,
-                          Buffer *out, int *exp_out) {
-  if (extra_digits <= 0) return false;
-
-  // Back out the extra digits
-  out->end -= extra_digits;
-
-  bool needs_to_round_up = [&] {
-    // We look at the digit just past the end.
-    // There must be 'extra_digits' extra valid digits after end.
-    if (*out->end > '5') return true;
-    if (*out->end < '5') return false;
-    if (has_leftover_value || std::any_of(out->end + 1, out->end + extra_digits,
-                                          [](char c) { return c != '0'; }))
-      return true;
-
-    // Ends in ...50*, round to even.
-    return out->last_digit() % 2 == 1;
-  }();
-
-  if (needs_to_round_up) {
-    RoundUp<FormatStyle::Precision>(out, exp_out);
-  }
-  return true;
-}
-
-// Print the value into the buffer.
-// This will not include the exponent, which will be returned in 'exp_out' for
-// Precision mode.
-template <typename Int, typename Float, FormatStyle mode>
-bool FloatToBufferImpl(Int int_mantissa, int exp, int precision, Buffer *out,
-                       int *exp_out) {
-  assert((CanFitMantissa<Float, Int>()));
-
-  const int int_bits = std::numeric_limits<Int>::digits;
-
-  // In precision mode, we start printing one char to the right because it will
-  // also include the '.'
-  // In fixed mode we put the dot afterwards on the right.
-  out->begin = out->end =
-      out->data + 1 + kMaxFixedPrecision + (mode == FormatStyle::Precision);
-
-  if (exp >= 0) {
-    if (std::numeric_limits<Float>::digits + exp > int_bits) {
-      // The value will overflow the Int
-      return false;
-    }
-    int digits_printed = PrintIntegralDigits<mode>(int_mantissa << exp, out);
-    int digits_to_zero_pad = precision;
-    if (mode == FormatStyle::Precision) {
-      *exp_out = digits_printed - 1;
-      digits_to_zero_pad -= digits_printed - 1;
-      if (RemoveExtraPrecision(-digits_to_zero_pad, false, out, exp_out)) {
-        return true;
-      }
-    }
-    for (; digits_to_zero_pad-- > 0;) out->push_back('0');
-    return true;
-  }
-
-  exp = -exp;
-  // We need at least 4 empty bits for the next decimal digit.
-  // We will multiply by 10.
-  if (exp > int_bits - 4) return false;
-
-  const Int mask = (Int{1} << exp) - 1;
-
-  // Print the integral part first.
-  int digits_printed = PrintIntegralDigits<mode>(int_mantissa >> exp, out);
-  int_mantissa &= mask;
-
-  int fractional_count = precision;
-  if (mode == FormatStyle::Precision) {
-    if (digits_printed == 0) {
-      // Find the first non-zero digit, when in Precision mode.
-      *exp_out = 0;
-      if (int_mantissa) {
-        while (int_mantissa <= mask) {
-          int_mantissa *= 10;
-          --*exp_out;
-        }
-      }
-      out->push_front(static_cast<char>(int_mantissa >> exp) + '0');
-      out->push_back('.');
-      int_mantissa &= mask;
-    } else {
-      // We already have a digit, and a '.'
-      *exp_out = digits_printed - 1;
-      fractional_count -= *exp_out;
-      if (RemoveExtraPrecision(-fractional_count, int_mantissa != 0, out,
-                               exp_out)) {
-        // If we had enough digits, return right away.
-        // The code below will try to round again otherwise.
-        return true;
-      }
-    }
-  }
-
-  auto get_next_digit = [&] {
-    int_mantissa *= 10;
-    int digit = static_cast<int>(int_mantissa >> exp);
-    int_mantissa &= mask;
-    return digit;
-  };
-
-  // Print fractional_count more digits, if available.
-  for (; fractional_count > 0; --fractional_count) {
-    out->push_back(get_next_digit() + '0');
-  }
-
-  int next_digit = get_next_digit();
-  if (next_digit > 5 ||
-      (next_digit == 5 && (int_mantissa || out->last_digit() % 2 == 1))) {
-    RoundUp<mode>(out, exp_out);
-  }
-
-  return true;
-}
-
-template <FormatStyle mode, typename Float>
-bool FloatToBuffer(Decomposed<Float> decomposed, int precision, Buffer *out,
-                   int *exp) {
-  if (precision > kMaxFixedPrecision) return false;
-
-  // Try with uint64_t.
-  if (CanFitMantissa<Float, std::uint64_t>() &&
-      FloatToBufferImpl<std::uint64_t, Float, mode>(
-          static_cast<std::uint64_t>(decomposed.mantissa),
-          static_cast<std::uint64_t>(decomposed.exponent), precision, out, exp))
-    return true;
-
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  // If that is not enough, try with __uint128_t.
-  return CanFitMantissa<Float, __uint128_t>() &&
-         FloatToBufferImpl<__uint128_t, Float, mode>(
-             static_cast<__uint128_t>(decomposed.mantissa),
-             static_cast<__uint128_t>(decomposed.exponent), precision, out,
-             exp);
-#endif
-  return false;
-}
-
-void WriteBufferToSink(char sign_char, absl::string_view str,
-                       const FormatConversionSpecImpl &conv,
-                       FormatSinkImpl *sink) {
-  int left_spaces = 0, zeros = 0, right_spaces = 0;
-  int missing_chars =
-      conv.width() >= 0 ? std::max(conv.width() - static_cast<int>(str.size()) -
-                                       static_cast<int>(sign_char != 0),
-                                   0)
-                        : 0;
-  if (conv.has_left_flag()) {
-    right_spaces = missing_chars;
-  } else if (conv.has_zero_flag()) {
-    zeros = missing_chars;
-  } else {
-    left_spaces = missing_chars;
-  }
-
-  sink->Append(left_spaces, ' ');
-  if (sign_char != '\0') sink->Append(1, sign_char);
-  sink->Append(zeros, '0');
-  sink->Append(str);
-  sink->Append(right_spaces, ' ');
-}
-
-template <typename Float>
-bool FloatToSink(const Float v, const FormatConversionSpecImpl &conv,
-                 FormatSinkImpl *sink) {
-  // Print the sign or the sign column.
-  Float abs_v = v;
-  char sign_char = 0;
-  if (std::signbit(abs_v)) {
-    sign_char = '-';
-    abs_v = -abs_v;
-  } else if (conv.has_show_pos_flag()) {
-    sign_char = '+';
-  } else if (conv.has_sign_col_flag()) {
-    sign_char = ' ';
-  }
-
-  // Print nan/inf.
-  if (ConvertNonNumericFloats(sign_char, abs_v, conv, sink)) {
-    return true;
-  }
-
-  int precision = conv.precision() < 0 ? 6 : conv.precision();
-
-  int exp = 0;
-
-  auto decomposed = Decompose(abs_v);
-
-  Buffer buffer;
-
-  FormatConversionChar c = conv.conversion_char();
-
-  if (c == FormatConversionCharInternal::f ||
-      c == FormatConversionCharInternal::F) {
-    FormatF(decomposed.mantissa, decomposed.exponent,
-            {sign_char, precision, conv, sink});
-    return true;
-  } else if (c == FormatConversionCharInternal::e ||
-             c == FormatConversionCharInternal::E) {
-    if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
-                                               &exp)) {
-      return FallbackToSnprintf(v, conv, sink);
-    }
-    if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back();
-    PrintExponent(
-        exp, FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e',
-        &buffer);
-  } else if (c == FormatConversionCharInternal::g ||
-             c == FormatConversionCharInternal::G) {
-    precision = std::max(0, precision - 1);
-    if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
-                                               &exp)) {
-      return FallbackToSnprintf(v, conv, sink);
-    }
-    if (precision + 1 > exp && exp >= -4) {
-      if (exp < 0) {
-        // Have 1.23456, needs 0.00123456
-        // Move the first digit
-        buffer.begin[1] = *buffer.begin;
-        // Add some zeros
-        for (; exp < -1; ++exp) *buffer.begin-- = '0';
-        *buffer.begin-- = '.';
-        *buffer.begin = '0';
-      } else if (exp > 0) {
-        // Have 1.23456, needs 1234.56
-        // Move the '.' exp positions to the right.
-        std::rotate(buffer.begin + 1, buffer.begin + 2, buffer.begin + exp + 2);
-      }
-      exp = 0;
-    }
-    if (!conv.has_alt_flag()) {
-      while (buffer.back() == '0') buffer.pop_back();
-      if (buffer.back() == '.') buffer.pop_back();
-    }
-    if (exp) {
-      PrintExponent(
-          exp, FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e',
-          &buffer);
-    }
-  } else if (c == FormatConversionCharInternal::a ||
-             c == FormatConversionCharInternal::A) {
-    bool uppercase = (c == FormatConversionCharInternal::A);
-    FormatA(HexFloatTypeParams(Float{}), decomposed.mantissa,
-            decomposed.exponent, uppercase, {sign_char, precision, conv, sink});
-    return true;
-  } else {
-    return false;
-  }
-
-  WriteBufferToSink(sign_char,
-                    absl::string_view(buffer.begin, buffer.end - buffer.begin),
-                    conv, sink);
-
-  return true;
-}
-
-}  // namespace
-
-bool ConvertFloatImpl(long double v, const FormatConversionSpecImpl &conv,
-                      FormatSinkImpl *sink) {
-  if (std::numeric_limits<long double>::digits ==
-      2 * std::numeric_limits<double>::digits) {
-    // This is the `double-double` representation of `long double`.
-    // We do not handle it natively. Fallback to snprintf.
-    return FallbackToSnprintf(v, conv, sink);
-  }
-
-  return FloatToSink(v, conv, sink);
-}
-
-bool ConvertFloatImpl(float v, const FormatConversionSpecImpl &conv,
-                      FormatSinkImpl *sink) {
-  return FloatToSink(static_cast<double>(v), conv, sink);
-}
-
-bool ConvertFloatImpl(double v, const FormatConversionSpecImpl &conv,
-                      FormatSinkImpl *sink) {
-  return FloatToSink(v, conv, sink);
-}
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/float_conversion.h b/third_party/abseil/absl/strings/internal/str_format/float_conversion.h
deleted file mode 100644
index 71100e7..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/float_conversion.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_FLOAT_CONVERSION_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_FLOAT_CONVERSION_H_
-
-#include "absl/strings/internal/str_format/extension.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-bool ConvertFloatImpl(float v, const FormatConversionSpecImpl &conv,
-                      FormatSinkImpl *sink);
-
-bool ConvertFloatImpl(double v, const FormatConversionSpecImpl &conv,
-                      FormatSinkImpl *sink);
-
-bool ConvertFloatImpl(long double v, const FormatConversionSpecImpl &conv,
-                      FormatSinkImpl *sink);
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_FLOAT_CONVERSION_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/output.cc b/third_party/abseil/absl/strings/internal/str_format/output.cc
deleted file mode 100644
index c4b2470..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/output.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/output.h"
-
-#include <errno.h>
-#include <cstring>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-namespace {
-struct ClearErrnoGuard {
-  ClearErrnoGuard() : old_value(errno) { errno = 0; }
-  ~ClearErrnoGuard() {
-    if (!errno) errno = old_value;
-  }
-  int old_value;
-};
-}  // namespace
-
-void BufferRawSink::Write(string_view v) {
-  size_t to_write = std::min(v.size(), size_);
-  std::memcpy(buffer_, v.data(), to_write);
-  buffer_ += to_write;
-  size_ -= to_write;
-  total_written_ += v.size();
-}
-
-void FILERawSink::Write(string_view v) {
-  while (!v.empty() && !error_) {
-    // Reset errno to zero in case the libc implementation doesn't set errno
-    // when a failure occurs.
-    ClearErrnoGuard guard;
-
-    if (size_t result = std::fwrite(v.data(), 1, v.size(), output_)) {
-      // Some progress was made.
-      count_ += result;
-      v.remove_prefix(result);
-    } else {
-      if (errno == EINTR) {
-        continue;
-      } else if (errno) {
-        error_ = errno;
-      } else if (std::ferror(output_)) {
-        // Non-POSIX compliant libc implementations may not set errno, so we
-        // have check the streams error indicator.
-        error_ = EBADF;
-      } else {
-        // We're likely on a non-POSIX system that encountered EINTR but had no
-        // way of reporting it.
-        continue;
-      }
-    }
-  }
-}
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/output.h b/third_party/abseil/absl/strings/internal/str_format/output.h
deleted file mode 100644
index 8030dae..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/output.h
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Output extension hooks for the Format library.
-// `internal::InvokeFlush` calls the appropriate flush function for the
-// specified output argument.
-// `BufferRawSink` is a simple output sink for a char buffer. Used by SnprintF.
-// `FILERawSink` is a std::FILE* based sink. Used by PrintF and FprintF.
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
-
-#include <cstdio>
-#include <ostream>
-#include <string>
-
-#include "absl/base/port.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-// RawSink implementation that writes into a char* buffer.
-// It will not overflow the buffer, but will keep the total count of chars
-// that would have been written.
-class BufferRawSink {
- public:
-  BufferRawSink(char* buffer, size_t size) : buffer_(buffer), size_(size) {}
-
-  size_t total_written() const { return total_written_; }
-  void Write(string_view v);
-
- private:
-  char* buffer_;
-  size_t size_;
-  size_t total_written_ = 0;
-};
-
-// RawSink implementation that writes into a FILE*.
-// It keeps track of the total number of bytes written and any error encountered
-// during the writes.
-class FILERawSink {
- public:
-  explicit FILERawSink(std::FILE* output) : output_(output) {}
-
-  void Write(string_view v);
-
-  size_t count() const { return count_; }
-  int error() const { return error_; }
-
- private:
-  std::FILE* output_;
-  int error_ = 0;
-  size_t count_ = 0;
-};
-
-// Provide RawSink integration with common types from the STL.
-inline void AbslFormatFlush(std::string* out, string_view s) {
-  out->append(s.data(), s.size());
-}
-inline void AbslFormatFlush(std::ostream* out, string_view s) {
-  out->write(s.data(), s.size());
-}
-
-inline void AbslFormatFlush(FILERawSink* sink, string_view v) {
-  sink->Write(v);
-}
-
-inline void AbslFormatFlush(BufferRawSink* sink, string_view v) {
-  sink->Write(v);
-}
-
-// This is a SFINAE to get a better compiler error message when the type
-// is not supported.
-template <typename T>
-auto InvokeFlush(T* out, string_view s) -> decltype(AbslFormatFlush(out, s)) {
-  AbslFormatFlush(out, s);
-}
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_OUTPUT_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/output_test.cc b/third_party/abseil/absl/strings/internal/str_format/output_test.cc
deleted file mode 100644
index ce2e91a..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/output_test.cc
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/output.h"
-
-#include <sstream>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/cord.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-TEST(InvokeFlush, String) {
-  std::string str = "ABC";
-  str_format_internal::InvokeFlush(&str, "DEF");
-  EXPECT_EQ(str, "ABCDEF");
-}
-
-TEST(InvokeFlush, Stream) {
-  std::stringstream str;
-  str << "ABC";
-  str_format_internal::InvokeFlush(&str, "DEF");
-  EXPECT_EQ(str.str(), "ABCDEF");
-}
-
-TEST(InvokeFlush, Cord) {
-  absl::Cord str("ABC");
-  str_format_internal::InvokeFlush(&str, "DEF");
-  EXPECT_EQ(str, "ABCDEF");
-}
-
-TEST(BufferRawSink, Limits) {
-  char buf[16];
-  {
-    std::fill(std::begin(buf), std::end(buf), 'x');
-    str_format_internal::BufferRawSink bufsink(buf, sizeof(buf) - 1);
-    str_format_internal::InvokeFlush(&bufsink, "Hello World237");
-    EXPECT_EQ(std::string(buf, sizeof(buf)), "Hello World237xx");
-  }
-  {
-    std::fill(std::begin(buf), std::end(buf), 'x');
-    str_format_internal::BufferRawSink bufsink(buf, sizeof(buf) - 1);
-    str_format_internal::InvokeFlush(&bufsink, "Hello World237237");
-    EXPECT_EQ(std::string(buf, sizeof(buf)), "Hello World2372x");
-  }
-  {
-    std::fill(std::begin(buf), std::end(buf), 'x');
-    str_format_internal::BufferRawSink bufsink(buf, sizeof(buf) - 1);
-    str_format_internal::InvokeFlush(&bufsink, "Hello World");
-    str_format_internal::InvokeFlush(&bufsink, "237");
-    EXPECT_EQ(std::string(buf, sizeof(buf)), "Hello World237xx");
-  }
-  {
-    std::fill(std::begin(buf), std::end(buf), 'x');
-    str_format_internal::BufferRawSink bufsink(buf, sizeof(buf) - 1);
-    str_format_internal::InvokeFlush(&bufsink, "Hello World");
-    str_format_internal::InvokeFlush(&bufsink, "237237");
-    EXPECT_EQ(std::string(buf, sizeof(buf)), "Hello World2372x");
-  }
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/parser.cc b/third_party/abseil/absl/strings/internal/str_format/parser.cc
deleted file mode 100644
index f308d02..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/parser.cc
+++ /dev/null
@@ -1,350 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/parser.h"
-
-#include <assert.h>
-#include <string.h>
-#include <wchar.h>
-#include <cctype>
-#include <cstdint>
-
-#include <algorithm>
-#include <initializer_list>
-#include <limits>
-#include <ostream>
-#include <string>
-#include <unordered_set>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-using CC = FormatConversionCharInternal;
-using LM = LengthMod;
-
-ABSL_CONST_INIT const ConvTag kTags[256] = {
-    {},    {},    {},    {},    {},    {},    {},    {},     // 00-07
-    {},    {},    {},    {},    {},    {},    {},    {},     // 08-0f
-    {},    {},    {},    {},    {},    {},    {},    {},     // 10-17
-    {},    {},    {},    {},    {},    {},    {},    {},     // 18-1f
-    {},    {},    {},    {},    {},    {},    {},    {},     // 20-27
-    {},    {},    {},    {},    {},    {},    {},    {},     // 28-2f
-    {},    {},    {},    {},    {},    {},    {},    {},     // 30-37
-    {},    {},    {},    {},    {},    {},    {},    {},     // 38-3f
-    {},    CC::A, {},    {},    {},    CC::E, CC::F, CC::G,  // @ABCDEFG
-    {},    {},    {},    {},    LM::L, {},    {},    {},     // HIJKLMNO
-    {},    {},    {},    {},    {},    {},    {},    {},     // PQRSTUVW
-    CC::X, {},    {},    {},    {},    {},    {},    {},     // XYZ[\]^_
-    {},    CC::a, {},    CC::c, CC::d, CC::e, CC::f, CC::g,  // `abcdefg
-    LM::h, CC::i, LM::j, {},    LM::l, {},    CC::n, CC::o,  // hijklmno
-    CC::p, LM::q, {},    CC::s, LM::t, CC::u, {},    {},     // pqrstuvw
-    CC::x, {},    LM::z, {},    {},    {},    {},    {},     // xyz{|}!
-    {},    {},    {},    {},    {},    {},    {},    {},     // 80-87
-    {},    {},    {},    {},    {},    {},    {},    {},     // 88-8f
-    {},    {},    {},    {},    {},    {},    {},    {},     // 90-97
-    {},    {},    {},    {},    {},    {},    {},    {},     // 98-9f
-    {},    {},    {},    {},    {},    {},    {},    {},     // a0-a7
-    {},    {},    {},    {},    {},    {},    {},    {},     // a8-af
-    {},    {},    {},    {},    {},    {},    {},    {},     // b0-b7
-    {},    {},    {},    {},    {},    {},    {},    {},     // b8-bf
-    {},    {},    {},    {},    {},    {},    {},    {},     // c0-c7
-    {},    {},    {},    {},    {},    {},    {},    {},     // c8-cf
-    {},    {},    {},    {},    {},    {},    {},    {},     // d0-d7
-    {},    {},    {},    {},    {},    {},    {},    {},     // d8-df
-    {},    {},    {},    {},    {},    {},    {},    {},     // e0-e7
-    {},    {},    {},    {},    {},    {},    {},    {},     // e8-ef
-    {},    {},    {},    {},    {},    {},    {},    {},     // f0-f7
-    {},    {},    {},    {},    {},    {},    {},    {},     // f8-ff
-};
-
-namespace {
-
-bool CheckFastPathSetting(const UnboundConversion& conv) {
-  bool should_be_basic = !conv.flags.left &&      //
-                         !conv.flags.show_pos &&  //
-                         !conv.flags.sign_col &&  //
-                         !conv.flags.alt &&       //
-                         !conv.flags.zero &&      //
-                         (conv.width.value() == -1) &&
-                         (conv.precision.value() == -1);
-  if (should_be_basic != conv.flags.basic) {
-    fprintf(stderr,
-            "basic=%d left=%d show_pos=%d sign_col=%d alt=%d zero=%d "
-            "width=%d precision=%d\n",
-            conv.flags.basic, conv.flags.left, conv.flags.show_pos,
-            conv.flags.sign_col, conv.flags.alt, conv.flags.zero,
-            conv.width.value(), conv.precision.value());
-  }
-  return should_be_basic == conv.flags.basic;
-}
-
-template <bool is_positional>
-const char *ConsumeConversion(const char *pos, const char *const end,
-                              UnboundConversion *conv, int *next_arg) {
-  const char* const original_pos = pos;
-  char c;
-  // Read the next char into `c` and update `pos`. Returns false if there are
-  // no more chars to read.
-#define ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR()          \
-  do {                                                  \
-    if (ABSL_PREDICT_FALSE(pos == end)) return nullptr; \
-    c = *pos++;                                         \
-  } while (0)
-
-  const auto parse_digits = [&] {
-    int digits = c - '0';
-    // We do not want to overflow `digits` so we consume at most digits10
-    // digits. If there are more digits the parsing will fail later on when the
-    // digit doesn't match the expected characters.
-    int num_digits = std::numeric_limits<int>::digits10;
-    for (;;) {
-      if (ABSL_PREDICT_FALSE(pos == end)) break;
-      c = *pos++;
-      if (!std::isdigit(c)) break;
-      --num_digits;
-      if (ABSL_PREDICT_FALSE(!num_digits)) break;
-      digits = 10 * digits + c - '0';
-    }
-    return digits;
-  };
-
-  if (is_positional) {
-    ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-    if (ABSL_PREDICT_FALSE(c < '1' || c > '9')) return nullptr;
-    conv->arg_position = parse_digits();
-    assert(conv->arg_position > 0);
-    if (ABSL_PREDICT_FALSE(c != '$')) return nullptr;
-  }
-
-  ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-
-  // We should start with the basic flag on.
-  assert(conv->flags.basic);
-
-  // Any non alpha character makes this conversion not basic.
-  // This includes flags (-+ #0), width (1-9, *) or precision (.).
-  // All conversion characters and length modifiers are alpha characters.
-  if (c < 'A') {
-    conv->flags.basic = false;
-
-    for (; c <= '0';) {
-      // FIXME: We might be able to speed this up reusing the lookup table from
-      // above. It might require changing Flags to be a plain integer where we
-      // can |= a value.
-      switch (c) {
-        case '-':
-          conv->flags.left = true;
-          break;
-        case '+':
-          conv->flags.show_pos = true;
-          break;
-        case ' ':
-          conv->flags.sign_col = true;
-          break;
-        case '#':
-          conv->flags.alt = true;
-          break;
-        case '0':
-          conv->flags.zero = true;
-          break;
-        default:
-          goto flags_done;
-      }
-      ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-    }
-flags_done:
-
-    if (c <= '9') {
-      if (c >= '0') {
-        int maybe_width = parse_digits();
-        if (!is_positional && c == '$') {
-          if (ABSL_PREDICT_FALSE(*next_arg != 0)) return nullptr;
-          // Positional conversion.
-          *next_arg = -1;
-          conv->flags = Flags();
-          conv->flags.basic = true;
-          return ConsumeConversion<true>(original_pos, end, conv, next_arg);
-        }
-        conv->width.set_value(maybe_width);
-      } else if (c == '*') {
-        ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-        if (is_positional) {
-          if (ABSL_PREDICT_FALSE(c < '1' || c > '9')) return nullptr;
-          conv->width.set_from_arg(parse_digits());
-          if (ABSL_PREDICT_FALSE(c != '$')) return nullptr;
-          ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-        } else {
-          conv->width.set_from_arg(++*next_arg);
-        }
-      }
-    }
-
-    if (c == '.') {
-      ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-      if (std::isdigit(c)) {
-        conv->precision.set_value(parse_digits());
-      } else if (c == '*') {
-        ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-        if (is_positional) {
-          if (ABSL_PREDICT_FALSE(c < '1' || c > '9')) return nullptr;
-          conv->precision.set_from_arg(parse_digits());
-          if (c != '$') return nullptr;
-          ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-        } else {
-          conv->precision.set_from_arg(++*next_arg);
-        }
-      } else {
-        conv->precision.set_value(0);
-      }
-    }
-  }
-
-  auto tag = GetTagForChar(c);
-
-  if (ABSL_PREDICT_FALSE(!tag.is_conv())) {
-    if (ABSL_PREDICT_FALSE(!tag.is_length())) return nullptr;
-
-    // It is a length modifier.
-    using str_format_internal::LengthMod;
-    LengthMod length_mod = tag.as_length();
-    ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-    if (c == 'h' && length_mod == LengthMod::h) {
-      conv->length_mod = LengthMod::hh;
-      ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-    } else if (c == 'l' && length_mod == LengthMod::l) {
-      conv->length_mod = LengthMod::ll;
-      ABSL_FORMAT_PARSER_INTERNAL_GET_CHAR();
-    } else {
-      conv->length_mod = length_mod;
-    }
-    tag = GetTagForChar(c);
-    if (ABSL_PREDICT_FALSE(!tag.is_conv())) return nullptr;
-  }
-
-  assert(CheckFastPathSetting(*conv));
-  (void)(&CheckFastPathSetting);
-
-  conv->conv = tag.as_conv();
-  if (!is_positional) conv->arg_position = ++*next_arg;
-  return pos;
-}
-
-}  // namespace
-
-std::string LengthModToString(LengthMod v) {
-  switch (v) {
-    case LengthMod::h:
-      return "h";
-    case LengthMod::hh:
-      return "hh";
-    case LengthMod::l:
-      return "l";
-    case LengthMod::ll:
-      return "ll";
-    case LengthMod::L:
-      return "L";
-    case LengthMod::j:
-      return "j";
-    case LengthMod::z:
-      return "z";
-    case LengthMod::t:
-      return "t";
-    case LengthMod::q:
-      return "q";
-    case LengthMod::none:
-      return "";
-  }
-  return "";
-}
-
-const char *ConsumeUnboundConversion(const char *p, const char *end,
-                                     UnboundConversion *conv, int *next_arg) {
-  if (*next_arg < 0) return ConsumeConversion<true>(p, end, conv, next_arg);
-  return ConsumeConversion<false>(p, end, conv, next_arg);
-}
-
-struct ParsedFormatBase::ParsedFormatConsumer {
-  explicit ParsedFormatConsumer(ParsedFormatBase *parsedformat)
-      : parsed(parsedformat), data_pos(parsedformat->data_.get()) {}
-
-  bool Append(string_view s) {
-    if (s.empty()) return true;
-
-    size_t text_end = AppendText(s);
-
-    if (!parsed->items_.empty() && !parsed->items_.back().is_conversion) {
-      // Let's extend the existing text run.
-      parsed->items_.back().text_end = text_end;
-    } else {
-      // Let's make a new text run.
-      parsed->items_.push_back({false, text_end, {}});
-    }
-    return true;
-  }
-
-  bool ConvertOne(const UnboundConversion &conv, string_view s) {
-    size_t text_end = AppendText(s);
-    parsed->items_.push_back({true, text_end, conv});
-    return true;
-  }
-
-  size_t AppendText(string_view s) {
-    memcpy(data_pos, s.data(), s.size());
-    data_pos += s.size();
-    return static_cast<size_t>(data_pos - parsed->data_.get());
-  }
-
-  ParsedFormatBase *parsed;
-  char* data_pos;
-};
-
-ParsedFormatBase::ParsedFormatBase(
-    string_view format, bool allow_ignored,
-    std::initializer_list<FormatConversionCharSet> convs)
-    : data_(format.empty() ? nullptr : new char[format.size()]) {
-  has_error_ = !ParseFormatString(format, ParsedFormatConsumer(this)) ||
-               !MatchesConversions(allow_ignored, convs);
-}
-
-bool ParsedFormatBase::MatchesConversions(
-    bool allow_ignored,
-    std::initializer_list<FormatConversionCharSet> convs) const {
-  std::unordered_set<int> used;
-  auto add_if_valid_conv = [&](int pos, char c) {
-      if (static_cast<size_t>(pos) > convs.size() ||
-          !Contains(convs.begin()[pos - 1], c))
-        return false;
-      used.insert(pos);
-      return true;
-  };
-  for (const ConversionItem &item : items_) {
-    if (!item.is_conversion) continue;
-    auto &conv = item.conv;
-    if (conv.precision.is_from_arg() &&
-        !add_if_valid_conv(conv.precision.get_from_arg(), '*'))
-      return false;
-    if (conv.width.is_from_arg() &&
-        !add_if_valid_conv(conv.width.get_from_arg(), '*'))
-      return false;
-    if (!add_if_valid_conv(conv.arg_position,
-                           FormatConversionCharToChar(conv.conv)))
-      return false;
-  }
-  return used.size() == convs.size() || allow_ignored;
-}
-
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_format/parser.h b/third_party/abseil/absl/strings/internal/str_format/parser.h
deleted file mode 100644
index 6504dd3..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/parser.h
+++ /dev/null
@@ -1,349 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_PARSER_H_
-#define ABSL_STRINGS_INTERNAL_STR_FORMAT_PARSER_H_
-
-#include <limits.h>
-#include <stddef.h>
-#include <stdlib.h>
-
-#include <cassert>
-#include <cstdint>
-#include <initializer_list>
-#include <iosfwd>
-#include <iterator>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "absl/strings/internal/str_format/checker.h"
-#include "absl/strings/internal/str_format/extension.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-enum class LengthMod : std::uint8_t { h, hh, l, ll, L, j, z, t, q, none };
-
-std::string LengthModToString(LengthMod v);
-
-// The analyzed properties of a single specified conversion.
-struct UnboundConversion {
-  UnboundConversion()
-      : flags() /* This is required to zero all the fields of flags. */ {
-    flags.basic = true;
-  }
-
-  class InputValue {
-   public:
-    void set_value(int value) {
-      assert(value >= 0);
-      value_ = value;
-    }
-    int value() const { return value_; }
-
-    // Marks the value as "from arg". aka the '*' format.
-    // Requires `value >= 1`.
-    // When set, is_from_arg() return true and get_from_arg() returns the
-    // original value.
-    // `value()`'s return value is unspecfied in this state.
-    void set_from_arg(int value) {
-      assert(value > 0);
-      value_ = -value - 1;
-    }
-    bool is_from_arg() const { return value_ < -1; }
-    int get_from_arg() const {
-      assert(is_from_arg());
-      return -value_ - 1;
-    }
-
-   private:
-    int value_ = -1;
-  };
-
-  // No need to initialize. It will always be set in the parser.
-  int arg_position;
-
-  InputValue width;
-  InputValue precision;
-
-  Flags flags;
-  LengthMod length_mod = LengthMod::none;
-  FormatConversionChar conv = FormatConversionCharInternal::kNone;
-};
-
-// Consume conversion spec prefix (not including '%') of [p, end) if valid.
-// Examples of valid specs would be e.g.: "s", "d", "-12.6f".
-// If valid, it returns the first character following the conversion spec,
-// and the spec part is broken down and returned in 'conv'.
-// If invalid, returns nullptr.
-const char* ConsumeUnboundConversion(const char* p, const char* end,
-                                     UnboundConversion* conv, int* next_arg);
-
-// Helper tag class for the table below.
-// It allows fast `char -> ConversionChar/LengthMod` checking and
-// conversions.
-class ConvTag {
- public:
-  constexpr ConvTag(FormatConversionChar conversion_char)  // NOLINT
-      : tag_(static_cast<int8_t>(conversion_char)) {}
-  // We invert the length modifiers to make them negative so that we can easily
-  // test for them.
-  constexpr ConvTag(LengthMod length_mod)  // NOLINT
-      : tag_(~static_cast<std::int8_t>(length_mod)) {}
-  // Everything else is -128, which is negative to make is_conv() simpler.
-  constexpr ConvTag() : tag_(-128) {}
-
-  bool is_conv() const { return tag_ >= 0; }
-  bool is_length() const { return tag_ < 0 && tag_ != -128; }
-  FormatConversionChar as_conv() const {
-    assert(is_conv());
-    return static_cast<FormatConversionChar>(tag_);
-  }
-  LengthMod as_length() const {
-    assert(is_length());
-    return static_cast<LengthMod>(~tag_);
-  }
-
- private:
-  std::int8_t tag_;
-};
-
-extern const ConvTag kTags[256];
-// Keep a single table for all the conversion chars and length modifiers.
-inline ConvTag GetTagForChar(char c) {
-  return kTags[static_cast<unsigned char>(c)];
-}
-
-// Parse the format string provided in 'src' and pass the identified items into
-// 'consumer'.
-// Text runs will be passed by calling
-//   Consumer::Append(string_view);
-// ConversionItems will be passed by calling
-//   Consumer::ConvertOne(UnboundConversion, string_view);
-// In the case of ConvertOne, the string_view that is passed is the
-// portion of the format string corresponding to the conversion, not including
-// the leading %. On success, it returns true. On failure, it stops and returns
-// false.
-template <typename Consumer>
-bool ParseFormatString(string_view src, Consumer consumer) {
-  int next_arg = 0;
-  const char* p = src.data();
-  const char* const end = p + src.size();
-  while (p != end) {
-    const char* percent = static_cast<const char*>(memchr(p, '%', end - p));
-    if (!percent) {
-      // We found the last substring.
-      return consumer.Append(string_view(p, end - p));
-    }
-    // We found a percent, so push the text run then process the percent.
-    if (ABSL_PREDICT_FALSE(!consumer.Append(string_view(p, percent - p)))) {
-      return false;
-    }
-    if (ABSL_PREDICT_FALSE(percent + 1 >= end)) return false;
-
-    auto tag = GetTagForChar(percent[1]);
-    if (tag.is_conv()) {
-      if (ABSL_PREDICT_FALSE(next_arg < 0)) {
-        // This indicates an error in the format string.
-        // The only way to get `next_arg < 0` here is to have a positional
-        // argument first which sets next_arg to -1 and then a non-positional
-        // argument.
-        return false;
-      }
-      p = percent + 2;
-
-      // Keep this case separate from the one below.
-      // ConvertOne is more efficient when the compiler can see that the `basic`
-      // flag is set.
-      UnboundConversion conv;
-      conv.conv = tag.as_conv();
-      conv.arg_position = ++next_arg;
-      if (ABSL_PREDICT_FALSE(
-              !consumer.ConvertOne(conv, string_view(percent + 1, 1)))) {
-        return false;
-      }
-    } else if (percent[1] != '%') {
-      UnboundConversion conv;
-      p = ConsumeUnboundConversion(percent + 1, end, &conv, &next_arg);
-      if (ABSL_PREDICT_FALSE(p == nullptr)) return false;
-      if (ABSL_PREDICT_FALSE(!consumer.ConvertOne(
-          conv, string_view(percent + 1, p - (percent + 1))))) {
-        return false;
-      }
-    } else {
-      if (ABSL_PREDICT_FALSE(!consumer.Append("%"))) return false;
-      p = percent + 2;
-      continue;
-    }
-  }
-  return true;
-}
-
-// Always returns true, or fails to compile in a constexpr context if s does not
-// point to a constexpr char array.
-constexpr bool EnsureConstexpr(string_view s) {
-  return s.empty() || s[0] == s[0];
-}
-
-class ParsedFormatBase {
- public:
-  explicit ParsedFormatBase(
-      string_view format, bool allow_ignored,
-      std::initializer_list<FormatConversionCharSet> convs);
-
-  ParsedFormatBase(const ParsedFormatBase& other) { *this = other; }
-
-  ParsedFormatBase(ParsedFormatBase&& other) { *this = std::move(other); }
-
-  ParsedFormatBase& operator=(const ParsedFormatBase& other) {
-    if (this == &other) return *this;
-    has_error_ = other.has_error_;
-    items_ = other.items_;
-    size_t text_size = items_.empty() ? 0 : items_.back().text_end;
-    data_.reset(new char[text_size]);
-    memcpy(data_.get(), other.data_.get(), text_size);
-    return *this;
-  }
-
-  ParsedFormatBase& operator=(ParsedFormatBase&& other) {
-    if (this == &other) return *this;
-    has_error_ = other.has_error_;
-    data_ = std::move(other.data_);
-    items_ = std::move(other.items_);
-    // Reset the vector to make sure the invariants hold.
-    other.items_.clear();
-    return *this;
-  }
-
-  template <typename Consumer>
-  bool ProcessFormat(Consumer consumer) const {
-    const char* const base = data_.get();
-    string_view text(base, 0);
-    for (const auto& item : items_) {
-      const char* const end = text.data() + text.size();
-      text = string_view(end, (base + item.text_end) - end);
-      if (item.is_conversion) {
-        if (!consumer.ConvertOne(item.conv, text)) return false;
-      } else {
-        if (!consumer.Append(text)) return false;
-      }
-    }
-    return !has_error_;
-  }
-
-  bool has_error() const { return has_error_; }
-
- private:
-  // Returns whether the conversions match and if !allow_ignored it verifies
-  // that all conversions are used by the format.
-  bool MatchesConversions(
-      bool allow_ignored,
-      std::initializer_list<FormatConversionCharSet> convs) const;
-
-  struct ParsedFormatConsumer;
-
-  struct ConversionItem {
-    bool is_conversion;
-    // Points to the past-the-end location of this element in the data_ array.
-    size_t text_end;
-    UnboundConversion conv;
-  };
-
-  bool has_error_;
-  std::unique_ptr<char[]> data_;
-  std::vector<ConversionItem> items_;
-};
-
-
-// A value type representing a preparsed format.  These can be created, copied
-// around, and reused to speed up formatting loops.
-// The user must specify through the template arguments the conversion
-// characters used in the format. This will be checked at compile time.
-//
-// This class uses Conv enum values to specify each argument.
-// This allows for more flexibility as you can specify multiple possible
-// conversion characters for each argument.
-// ParsedFormat<char...> is a simplified alias for when the user only
-// needs to specify a single conversion character for each argument.
-//
-// Example:
-//   // Extended format supports multiple characters per argument:
-//   using MyFormat = ExtendedParsedFormat<Conv::d | Conv::x>;
-//   MyFormat GetFormat(bool use_hex) {
-//     if (use_hex) return MyFormat("foo %x bar");
-//     return MyFormat("foo %d bar");
-//   }
-//   // 'format' can be used with any value that supports 'd' and 'x',
-//   // like `int`.
-//   auto format = GetFormat(use_hex);
-//   value = StringF(format, i);
-//
-// This class also supports runtime format checking with the ::New() and
-// ::NewAllowIgnored() factory functions.
-// This is the only API that allows the user to pass a runtime specified format
-// string. These factory functions will return NULL if the format does not match
-// the conversions requested by the user.
-template <FormatConversionCharSet... C>
-class ExtendedParsedFormat : public str_format_internal::ParsedFormatBase {
- public:
-  explicit ExtendedParsedFormat(string_view format)
-#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-      __attribute__((
-          enable_if(str_format_internal::EnsureConstexpr(format),
-                    "Format string is not constexpr."),
-          enable_if(str_format_internal::ValidFormatImpl<C...>(format),
-                    "Format specified does not match the template arguments.")))
-#endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-      : ExtendedParsedFormat(format, false) {
-  }
-
-  // ExtendedParsedFormat factory function.
-  // The user still has to specify the conversion characters, but they will not
-  // be checked at compile time. Instead, it will be checked at runtime.
-  // This delays the checking to runtime, but allows the user to pass
-  // dynamically sourced formats.
-  // It returns NULL if the format does not match the conversion characters.
-  // The user is responsible for checking the return value before using it.
-  //
-  // The 'New' variant will check that all the specified arguments are being
-  // consumed by the format and return NULL if any argument is being ignored.
-  // The 'NewAllowIgnored' variant will not verify this and will allow formats
-  // that ignore arguments.
-  static std::unique_ptr<ExtendedParsedFormat> New(string_view format) {
-    return New(format, false);
-  }
-  static std::unique_ptr<ExtendedParsedFormat> NewAllowIgnored(
-      string_view format) {
-    return New(format, true);
-  }
-
- private:
-  static std::unique_ptr<ExtendedParsedFormat> New(string_view format,
-                                                   bool allow_ignored) {
-    std::unique_ptr<ExtendedParsedFormat> conv(
-        new ExtendedParsedFormat(format, allow_ignored));
-    if (conv->has_error()) return nullptr;
-    return conv;
-  }
-
-  ExtendedParsedFormat(string_view s, bool allow_ignored)
-      : ParsedFormatBase(s, allow_ignored, {C...}) {}
-};
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_FORMAT_PARSER_H_
diff --git a/third_party/abseil/absl/strings/internal/str_format/parser_test.cc b/third_party/abseil/absl/strings/internal/str_format/parser_test.cc
deleted file mode 100644
index a5fa1c7..0000000
--- a/third_party/abseil/absl/strings/internal/str_format/parser_test.cc
+++ /dev/null
@@ -1,427 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/str_format/parser.h"
-
-#include <string.h>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace str_format_internal {
-
-namespace {
-
-using testing::Pair;
-
-TEST(LengthModTest, Names) {
-  struct Expectation {
-    int line;
-    LengthMod mod;
-    const char *name;
-  };
-  const Expectation kExpect[] = {
-    {__LINE__, LengthMod::none, ""  },
-    {__LINE__, LengthMod::h,    "h" },
-    {__LINE__, LengthMod::hh,   "hh"},
-    {__LINE__, LengthMod::l,    "l" },
-    {__LINE__, LengthMod::ll,   "ll"},
-    {__LINE__, LengthMod::L,    "L" },
-    {__LINE__, LengthMod::j,    "j" },
-    {__LINE__, LengthMod::z,    "z" },
-    {__LINE__, LengthMod::t,    "t" },
-    {__LINE__, LengthMod::q,    "q" },
-  };
-  EXPECT_EQ(ABSL_ARRAYSIZE(kExpect), 10);
-  for (auto e : kExpect) {
-    SCOPED_TRACE(e.line);
-    EXPECT_EQ(e.name, LengthModToString(e.mod));
-  }
-}
-
-TEST(ConversionCharTest, Names) {
-  struct Expectation {
-    FormatConversionChar id;
-    char name;
-  };
-  // clang-format off
-  const Expectation kExpect[] = {
-#define X(c) {FormatConversionCharInternal::c, #c[0]}
-    X(c), X(s),                                      // text
-    X(d), X(i), X(o), X(u), X(x), X(X),              // int
-    X(f), X(F), X(e), X(E), X(g), X(G), X(a), X(A),  // float
-    X(n), X(p),                                      // misc
-#undef X
-    {FormatConversionCharInternal::kNone, '\0'},
-  };
-  // clang-format on
-  for (auto e : kExpect) {
-    SCOPED_TRACE(e.name);
-    FormatConversionChar v = e.id;
-    EXPECT_EQ(e.name, FormatConversionCharToChar(v));
-  }
-}
-
-class ConsumeUnboundConversionTest : public ::testing::Test {
- public:
-  std::pair<string_view, string_view> Consume(string_view src) {
-    int next = 0;
-    o = UnboundConversion();  // refresh
-    const char* p = ConsumeUnboundConversion(
-        src.data(), src.data() + src.size(), &o, &next);
-    if (!p) return {{}, src};
-    return {string_view(src.data(), p - src.data()),
-            string_view(p, src.data() + src.size() - p)};
-  }
-
-  bool Run(const char *fmt, bool force_positional = false) {
-    int next = force_positional ? -1 : 0;
-    o = UnboundConversion();  // refresh
-    return ConsumeUnboundConversion(fmt, fmt + strlen(fmt), &o, &next) ==
-           fmt + strlen(fmt);
-  }
-  UnboundConversion o;
-};
-
-TEST_F(ConsumeUnboundConversionTest, ConsumeSpecification) {
-  struct Expectation {
-    int line;
-    string_view src;
-    string_view out;
-    string_view src_post;
-  };
-  const Expectation kExpect[] = {
-    {__LINE__, "",     "",     ""  },
-    {__LINE__, "b",    "",     "b" },  // 'b' is invalid
-    {__LINE__, "ba",   "",     "ba"},  // 'b' is invalid
-    {__LINE__, "l",    "",     "l" },  // just length mod isn't okay
-    {__LINE__, "d",    "d",    ""  },  // basic
-    {__LINE__, "d ",   "d",    " " },  // leave suffix
-    {__LINE__, "dd",   "d",    "d" },  // don't be greedy
-    {__LINE__, "d9",   "d",    "9" },  // leave non-space suffix
-    {__LINE__, "dzz",  "d",    "zz"},  // length mod as suffix
-    {__LINE__, "1$*2$d", "1$*2$d", ""  },  // arg indexing and * allowed.
-    {__LINE__, "0-14.3hhd", "0-14.3hhd", ""},  // precision, width
-    {__LINE__, " 0-+#14.3hhd", " 0-+#14.3hhd", ""},  // flags
-  };
-  for (const auto& e : kExpect) {
-    SCOPED_TRACE(e.line);
-    EXPECT_THAT(Consume(e.src), Pair(e.out, e.src_post));
-  }
-}
-
-TEST_F(ConsumeUnboundConversionTest, BasicConversion) {
-  EXPECT_FALSE(Run(""));
-  EXPECT_FALSE(Run("z"));
-
-  EXPECT_FALSE(Run("dd"));  // no excess allowed
-
-  EXPECT_TRUE(Run("d"));
-  EXPECT_EQ('d', FormatConversionCharToChar(o.conv));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_LT(o.width.value(), 0);
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_LT(o.precision.value(), 0);
-  EXPECT_EQ(1, o.arg_position);
-}
-
-TEST_F(ConsumeUnboundConversionTest, ArgPosition) {
-  EXPECT_TRUE(Run("d"));
-  EXPECT_EQ(1, o.arg_position);
-  EXPECT_TRUE(Run("3$d"));
-  EXPECT_EQ(3, o.arg_position);
-  EXPECT_TRUE(Run("1$d"));
-  EXPECT_EQ(1, o.arg_position);
-  EXPECT_TRUE(Run("1$d", true));
-  EXPECT_EQ(1, o.arg_position);
-  EXPECT_TRUE(Run("123$d"));
-  EXPECT_EQ(123, o.arg_position);
-  EXPECT_TRUE(Run("123$d", true));
-  EXPECT_EQ(123, o.arg_position);
-  EXPECT_TRUE(Run("10$d"));
-  EXPECT_EQ(10, o.arg_position);
-  EXPECT_TRUE(Run("10$d", true));
-  EXPECT_EQ(10, o.arg_position);
-
-  // Position can't be zero.
-  EXPECT_FALSE(Run("0$d"));
-  EXPECT_FALSE(Run("0$d", true));
-  EXPECT_FALSE(Run("1$*0$d"));
-  EXPECT_FALSE(Run("1$.*0$d"));
-
-  // Position can't start with a zero digit at all. That is not a 'decimal'.
-  EXPECT_FALSE(Run("01$p"));
-  EXPECT_FALSE(Run("01$p", true));
-  EXPECT_FALSE(Run("1$*01$p"));
-  EXPECT_FALSE(Run("1$.*01$p"));
-}
-
-TEST_F(ConsumeUnboundConversionTest, WidthAndPrecision) {
-  EXPECT_TRUE(Run("14d"));
-  EXPECT_EQ('d', FormatConversionCharToChar(o.conv));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_EQ(14, o.width.value());
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_LT(o.precision.value(), 0);
-
-  EXPECT_TRUE(Run("14.d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_EQ(14, o.width.value());
-  EXPECT_EQ(0, o.precision.value());
-
-  EXPECT_TRUE(Run(".d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_LT(o.width.value(), 0);
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_EQ(0, o.precision.value());
-
-  EXPECT_TRUE(Run(".5d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_LT(o.width.value(), 0);
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_EQ(5, o.precision.value());
-
-  EXPECT_TRUE(Run(".0d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_LT(o.width.value(), 0);
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_EQ(0, o.precision.value());
-
-  EXPECT_TRUE(Run("14.5d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_EQ(14, o.width.value());
-  EXPECT_EQ(5, o.precision.value());
-
-  EXPECT_TRUE(Run("*.*d"));
-  EXPECT_TRUE(o.width.is_from_arg());
-  EXPECT_EQ(1, o.width.get_from_arg());
-  EXPECT_TRUE(o.precision.is_from_arg());
-  EXPECT_EQ(2, o.precision.get_from_arg());
-  EXPECT_EQ(3, o.arg_position);
-
-  EXPECT_TRUE(Run("*d"));
-  EXPECT_TRUE(o.width.is_from_arg());
-  EXPECT_EQ(1, o.width.get_from_arg());
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_LT(o.precision.value(), 0);
-  EXPECT_EQ(2, o.arg_position);
-
-  EXPECT_TRUE(Run(".*d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_LT(o.width.value(), 0);
-  EXPECT_TRUE(o.precision.is_from_arg());
-  EXPECT_EQ(1, o.precision.get_from_arg());
-  EXPECT_EQ(2, o.arg_position);
-
-  // mixed implicit and explicit: didn't specify arg position.
-  EXPECT_FALSE(Run("*23$.*34$d"));
-
-  EXPECT_TRUE(Run("12$*23$.*34$d"));
-  EXPECT_EQ(12, o.arg_position);
-  EXPECT_TRUE(o.width.is_from_arg());
-  EXPECT_EQ(23, o.width.get_from_arg());
-  EXPECT_TRUE(o.precision.is_from_arg());
-  EXPECT_EQ(34, o.precision.get_from_arg());
-
-  EXPECT_TRUE(Run("2$*5$.*9$d"));
-  EXPECT_EQ(2, o.arg_position);
-  EXPECT_TRUE(o.width.is_from_arg());
-  EXPECT_EQ(5, o.width.get_from_arg());
-  EXPECT_TRUE(o.precision.is_from_arg());
-  EXPECT_EQ(9, o.precision.get_from_arg());
-
-  EXPECT_FALSE(Run(".*0$d")) << "no arg 0";
-
-  // Large values
-  EXPECT_TRUE(Run("999999999.999999999d"));
-  EXPECT_FALSE(o.width.is_from_arg());
-  EXPECT_EQ(999999999, o.width.value());
-  EXPECT_FALSE(o.precision.is_from_arg());
-  EXPECT_EQ(999999999, o.precision.value());
-
-  EXPECT_FALSE(Run("1000000000.999999999d"));
-  EXPECT_FALSE(Run("999999999.1000000000d"));
-  EXPECT_FALSE(Run("9999999999d"));
-  EXPECT_FALSE(Run(".9999999999d"));
-}
-
-TEST_F(ConsumeUnboundConversionTest, Flags) {
-  static const char kAllFlags[] = "-+ #0";
-  static const int kNumFlags = ABSL_ARRAYSIZE(kAllFlags) - 1;
-  for (int rev = 0; rev < 2; ++rev) {
-    for (int i = 0; i < 1 << kNumFlags; ++i) {
-      std::string fmt;
-      for (int k = 0; k < kNumFlags; ++k)
-        if ((i >> k) & 1) fmt += kAllFlags[k];
-      // flag order shouldn't matter
-      if (rev == 1) { std::reverse(fmt.begin(), fmt.end()); }
-      fmt += 'd';
-      SCOPED_TRACE(fmt);
-      EXPECT_TRUE(Run(fmt.c_str()));
-      EXPECT_EQ(fmt.find('-') == std::string::npos, !o.flags.left);
-      EXPECT_EQ(fmt.find('+') == std::string::npos, !o.flags.show_pos);
-      EXPECT_EQ(fmt.find(' ') == std::string::npos, !o.flags.sign_col);
-      EXPECT_EQ(fmt.find('#') == std::string::npos, !o.flags.alt);
-      EXPECT_EQ(fmt.find('0') == std::string::npos, !o.flags.zero);
-    }
-  }
-}
-
-TEST_F(ConsumeUnboundConversionTest, BasicFlag) {
-  // Flag is on
-  for (const char* fmt : {"d", "llx", "G", "1$X"}) {
-    SCOPED_TRACE(fmt);
-    EXPECT_TRUE(Run(fmt));
-    EXPECT_TRUE(o.flags.basic);
-  }
-
-  // Flag is off
-  for (const char* fmt : {"3d", ".llx", "-G", "1$#X"}) {
-    SCOPED_TRACE(fmt);
-    EXPECT_TRUE(Run(fmt));
-    EXPECT_FALSE(o.flags.basic);
-  }
-}
-
-TEST_F(ConsumeUnboundConversionTest, LengthMod) {
-  EXPECT_TRUE(Run("d"));
-  EXPECT_EQ(LengthMod::none, o.length_mod);
-  EXPECT_TRUE(Run("hd"));
-  EXPECT_EQ(LengthMod::h, o.length_mod);
-  EXPECT_TRUE(Run("hhd"));
-  EXPECT_EQ(LengthMod::hh, o.length_mod);
-  EXPECT_TRUE(Run("ld"));
-  EXPECT_EQ(LengthMod::l, o.length_mod);
-  EXPECT_TRUE(Run("lld"));
-  EXPECT_EQ(LengthMod::ll, o.length_mod);
-  EXPECT_TRUE(Run("Lf"));
-  EXPECT_EQ(LengthMod::L, o.length_mod);
-  EXPECT_TRUE(Run("qf"));
-  EXPECT_EQ(LengthMod::q, o.length_mod);
-  EXPECT_TRUE(Run("jd"));
-  EXPECT_EQ(LengthMod::j, o.length_mod);
-  EXPECT_TRUE(Run("zd"));
-  EXPECT_EQ(LengthMod::z, o.length_mod);
-  EXPECT_TRUE(Run("td"));
-  EXPECT_EQ(LengthMod::t, o.length_mod);
-}
-
-struct SummarizeConsumer {
-  std::string* out;
-  explicit SummarizeConsumer(std::string* out) : out(out) {}
-
-  bool Append(string_view s) {
-    *out += "[" + std::string(s) + "]";
-    return true;
-  }
-
-  bool ConvertOne(const UnboundConversion& conv, string_view s) {
-    *out += "{";
-    *out += std::string(s);
-    *out += ":";
-    *out += std::to_string(conv.arg_position) + "$";
-    if (conv.width.is_from_arg()) {
-      *out += std::to_string(conv.width.get_from_arg()) + "$*";
-    }
-    if (conv.precision.is_from_arg()) {
-      *out += "." + std::to_string(conv.precision.get_from_arg()) + "$*";
-    }
-    *out += FormatConversionCharToChar(conv.conv);
-    *out += "}";
-    return true;
-  }
-};
-
-std::string SummarizeParsedFormat(const ParsedFormatBase& pc) {
-  std::string out;
-  if (!pc.ProcessFormat(SummarizeConsumer(&out))) out += "!";
-  return out;
-}
-
-class ParsedFormatTest : public testing::Test {};
-
-TEST_F(ParsedFormatTest, ValueSemantics) {
-  ParsedFormatBase p1({}, true, {});  // empty format
-  EXPECT_EQ("", SummarizeParsedFormat(p1));
-
-  ParsedFormatBase p2 = p1;  // copy construct (empty)
-  EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p2));
-
-  p1 = ParsedFormatBase("hello%s", true,
-                        {FormatConversionCharSetInternal::s});  // move assign
-  EXPECT_EQ("[hello]{s:1$s}", SummarizeParsedFormat(p1));
-
-  ParsedFormatBase p3 = p1;  // copy construct (nonempty)
-  EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p3));
-
-  using std::swap;
-  swap(p1, p2);
-  EXPECT_EQ("", SummarizeParsedFormat(p1));
-  EXPECT_EQ("[hello]{s:1$s}", SummarizeParsedFormat(p2));
-  swap(p1, p2);  // undo
-
-  p2 = p1;  // copy assign
-  EXPECT_EQ(SummarizeParsedFormat(p1), SummarizeParsedFormat(p2));
-}
-
-struct ExpectParse {
-  const char* in;
-  std::initializer_list<FormatConversionCharSet> conv_set;
-  const char* out;
-};
-
-TEST_F(ParsedFormatTest, Parsing) {
-  // Parse should be equivalent to that obtained by ConversionParseIterator.
-  // No need to retest the parsing edge cases here.
-  const ExpectParse kExpect[] = {
-      {"", {}, ""},
-      {"ab", {}, "[ab]"},
-      {"a%d", {FormatConversionCharSetInternal::d}, "[a]{d:1$d}"},
-      {"a%+d", {FormatConversionCharSetInternal::d}, "[a]{+d:1$d}"},
-      {"a% d", {FormatConversionCharSetInternal::d}, "[a]{ d:1$d}"},
-      {"a%b %d", {}, "[a]!"},  // stop after error
-  };
-  for (const auto& e : kExpect) {
-    SCOPED_TRACE(e.in);
-    EXPECT_EQ(e.out,
-              SummarizeParsedFormat(ParsedFormatBase(e.in, false, e.conv_set)));
-  }
-}
-
-TEST_F(ParsedFormatTest, ParsingFlagOrder) {
-  const ExpectParse kExpect[] = {
-      {"a%+ 0d", {FormatConversionCharSetInternal::d}, "[a]{+ 0d:1$d}"},
-      {"a%+0 d", {FormatConversionCharSetInternal::d}, "[a]{+0 d:1$d}"},
-      {"a%0+ d", {FormatConversionCharSetInternal::d}, "[a]{0+ d:1$d}"},
-      {"a% +0d", {FormatConversionCharSetInternal::d}, "[a]{ +0d:1$d}"},
-      {"a%0 +d", {FormatConversionCharSetInternal::d}, "[a]{0 +d:1$d}"},
-      {"a% 0+d", {FormatConversionCharSetInternal::d}, "[a]{ 0+d:1$d}"},
-      {"a%+   0+d", {FormatConversionCharSetInternal::d}, "[a]{+   0+d:1$d}"},
-  };
-  for (const auto& e : kExpect) {
-    SCOPED_TRACE(e.in);
-    EXPECT_EQ(e.out,
-              SummarizeParsedFormat(ParsedFormatBase(e.in, false, e.conv_set)));
-  }
-}
-
-}  // namespace
-}  // namespace str_format_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/str_join_internal.h b/third_party/abseil/absl/strings/internal/str_join_internal.h
deleted file mode 100644
index 31dbf67..0000000
--- a/third_party/abseil/absl/strings/internal/str_join_internal.h
+++ /dev/null
@@ -1,314 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// This file declares INTERNAL parts of the Join API that are inlined/templated
-// or otherwise need to be available at compile time. The main abstractions
-// defined in this file are:
-//
-//   - A handful of default Formatters
-//   - JoinAlgorithm() overloads
-//   - JoinRange() overloads
-//   - JoinTuple()
-//
-// DO NOT INCLUDE THIS FILE DIRECTLY. Use this file by including
-// absl/strings/str_join.h
-//
-// IWYU pragma: private, include "absl/strings/str_join.h"
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_JOIN_INTERNAL_H_
-#define ABSL_STRINGS_INTERNAL_STR_JOIN_INTERNAL_H_
-
-#include <cstring>
-#include <iterator>
-#include <memory>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "absl/strings/internal/ostringstream.h"
-#include "absl/strings/internal/resize_uninitialized.h"
-#include "absl/strings/str_cat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-//
-// Formatter objects
-//
-// The following are implementation classes for standard Formatter objects. The
-// factory functions that users will call to create and use these formatters are
-// defined and documented in strings/join.h.
-//
-
-// The default formatter. Converts alpha-numeric types to strings.
-struct AlphaNumFormatterImpl {
-  // This template is needed in order to support passing in a dereferenced
-  // vector<bool>::iterator
-  template <typename T>
-  void operator()(std::string* out, const T& t) const {
-    StrAppend(out, AlphaNum(t));
-  }
-
-  void operator()(std::string* out, const AlphaNum& t) const {
-    StrAppend(out, t);
-  }
-};
-
-// A type that's used to overload the JoinAlgorithm() function (defined below)
-// for ranges that do not require additional formatting (e.g., a range of
-// strings).
-
-struct NoFormatter : public AlphaNumFormatterImpl {};
-
-// Formats types to strings using the << operator.
-class StreamFormatterImpl {
- public:
-  // The method isn't const because it mutates state. Making it const will
-  // render StreamFormatterImpl thread-hostile.
-  template <typename T>
-  void operator()(std::string* out, const T& t) {
-    // The stream is created lazily to avoid paying the relatively high cost
-    // of its construction when joining an empty range.
-    if (strm_) {
-      strm_->clear();  // clear the bad, fail and eof bits in case they were set
-      strm_->str(out);
-    } else {
-      strm_.reset(new strings_internal::OStringStream(out));
-    }
-    *strm_ << t;
-  }
-
- private:
-  std::unique_ptr<strings_internal::OStringStream> strm_;
-};
-
-// Formats a std::pair<>. The 'first' member is formatted using f1_ and the
-// 'second' member is formatted using f2_. sep_ is the separator.
-template <typename F1, typename F2>
-class PairFormatterImpl {
- public:
-  PairFormatterImpl(F1 f1, absl::string_view sep, F2 f2)
-      : f1_(std::move(f1)), sep_(sep), f2_(std::move(f2)) {}
-
-  template <typename T>
-  void operator()(std::string* out, const T& p) {
-    f1_(out, p.first);
-    out->append(sep_);
-    f2_(out, p.second);
-  }
-
-  template <typename T>
-  void operator()(std::string* out, const T& p) const {
-    f1_(out, p.first);
-    out->append(sep_);
-    f2_(out, p.second);
-  }
-
- private:
-  F1 f1_;
-  std::string sep_;
-  F2 f2_;
-};
-
-// Wraps another formatter and dereferences the argument to operator() then
-// passes the dereferenced argument to the wrapped formatter. This can be
-// useful, for example, to join a std::vector<int*>.
-template <typename Formatter>
-class DereferenceFormatterImpl {
- public:
-  DereferenceFormatterImpl() : f_() {}
-  explicit DereferenceFormatterImpl(Formatter&& f)
-      : f_(std::forward<Formatter>(f)) {}
-
-  template <typename T>
-  void operator()(std::string* out, const T& t) {
-    f_(out, *t);
-  }
-
-  template <typename T>
-  void operator()(std::string* out, const T& t) const {
-    f_(out, *t);
-  }
-
- private:
-  Formatter f_;
-};
-
-// DefaultFormatter<T> is a traits class that selects a default Formatter to use
-// for the given type T. The ::Type member names the Formatter to use. This is
-// used by the strings::Join() functions that do NOT take a Formatter argument,
-// in which case a default Formatter must be chosen.
-//
-// AlphaNumFormatterImpl is the default in the base template, followed by
-// specializations for other types.
-template <typename ValueType>
-struct DefaultFormatter {
-  typedef AlphaNumFormatterImpl Type;
-};
-template <>
-struct DefaultFormatter<const char*> {
-  typedef AlphaNumFormatterImpl Type;
-};
-template <>
-struct DefaultFormatter<char*> {
-  typedef AlphaNumFormatterImpl Type;
-};
-template <>
-struct DefaultFormatter<std::string> {
-  typedef NoFormatter Type;
-};
-template <>
-struct DefaultFormatter<absl::string_view> {
-  typedef NoFormatter Type;
-};
-template <typename ValueType>
-struct DefaultFormatter<ValueType*> {
-  typedef DereferenceFormatterImpl<typename DefaultFormatter<ValueType>::Type>
-      Type;
-};
-
-template <typename ValueType>
-struct DefaultFormatter<std::unique_ptr<ValueType>>
-    : public DefaultFormatter<ValueType*> {};
-
-//
-// JoinAlgorithm() functions
-//
-
-// The main joining algorithm. This simply joins the elements in the given
-// iterator range, each separated by the given separator, into an output string,
-// and formats each element using the provided Formatter object.
-template <typename Iterator, typename Formatter>
-std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
-                          Formatter&& f) {
-  std::string result;
-  absl::string_view sep("");
-  for (Iterator it = start; it != end; ++it) {
-    result.append(sep.data(), sep.size());
-    f(&result, *it);
-    sep = s;
-  }
-  return result;
-}
-
-// A joining algorithm that's optimized for a forward iterator range of
-// string-like objects that do not need any additional formatting. This is to
-// optimize the common case of joining, say, a std::vector<string> or a
-// std::vector<absl::string_view>.
-//
-// This is an overload of the previous JoinAlgorithm() function. Here the
-// Formatter argument is of type NoFormatter. Since NoFormatter is an internal
-// type, this overload is only invoked when strings::Join() is called with a
-// range of string-like objects (e.g., std::string, absl::string_view), and an
-// explicit Formatter argument was NOT specified.
-//
-// The optimization is that the needed space will be reserved in the output
-// string to avoid the need to resize while appending. To do this, the iterator
-// range will be traversed twice: once to calculate the total needed size, and
-// then again to copy the elements and delimiters to the output string.
-template <typename Iterator,
-          typename = typename std::enable_if<std::is_convertible<
-              typename std::iterator_traits<Iterator>::iterator_category,
-              std::forward_iterator_tag>::value>::type>
-std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
-                          NoFormatter) {
-  std::string result;
-  if (start != end) {
-    // Sums size
-    size_t result_size = start->size();
-    for (Iterator it = start; ++it != end;) {
-      result_size += s.size();
-      result_size += it->size();
-    }
-
-    if (result_size > 0) {
-      STLStringResizeUninitialized(&result, result_size);
-
-      // Joins strings
-      char* result_buf = &*result.begin();
-      memcpy(result_buf, start->data(), start->size());
-      result_buf += start->size();
-      for (Iterator it = start; ++it != end;) {
-        memcpy(result_buf, s.data(), s.size());
-        result_buf += s.size();
-        memcpy(result_buf, it->data(), it->size());
-        result_buf += it->size();
-      }
-    }
-  }
-
-  return result;
-}
-
-// JoinTupleLoop implements a loop over the elements of a std::tuple, which
-// are heterogeneous. The primary template matches the tuple interior case. It
-// continues the iteration after appending a separator (for nonzero indices)
-// and formatting an element of the tuple. The specialization for the I=N case
-// matches the end-of-tuple, and terminates the iteration.
-template <size_t I, size_t N>
-struct JoinTupleLoop {
-  template <typename Tup, typename Formatter>
-  void operator()(std::string* out, const Tup& tup, absl::string_view sep,
-                  Formatter&& fmt) {
-    if (I > 0) out->append(sep.data(), sep.size());
-    fmt(out, std::get<I>(tup));
-    JoinTupleLoop<I + 1, N>()(out, tup, sep, fmt);
-  }
-};
-template <size_t N>
-struct JoinTupleLoop<N, N> {
-  template <typename Tup, typename Formatter>
-  void operator()(std::string*, const Tup&, absl::string_view, Formatter&&) {}
-};
-
-template <typename... T, typename Formatter>
-std::string JoinAlgorithm(const std::tuple<T...>& tup, absl::string_view sep,
-                          Formatter&& fmt) {
-  std::string result;
-  JoinTupleLoop<0, sizeof...(T)>()(&result, tup, sep, fmt);
-  return result;
-}
-
-template <typename Iterator>
-std::string JoinRange(Iterator first, Iterator last,
-                      absl::string_view separator) {
-  // No formatter was explicitly given, so a default must be chosen.
-  typedef typename std::iterator_traits<Iterator>::value_type ValueType;
-  typedef typename DefaultFormatter<ValueType>::Type Formatter;
-  return JoinAlgorithm(first, last, separator, Formatter());
-}
-
-template <typename Range, typename Formatter>
-std::string JoinRange(const Range& range, absl::string_view separator,
-                      Formatter&& fmt) {
-  using std::begin;
-  using std::end;
-  return JoinAlgorithm(begin(range), end(range), separator, fmt);
-}
-
-template <typename Range>
-std::string JoinRange(const Range& range, absl::string_view separator) {
-  using std::begin;
-  using std::end;
-  return JoinRange(begin(range), end(range), separator);
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_JOIN_INTERNAL_H_
diff --git a/third_party/abseil/absl/strings/internal/str_split_internal.h b/third_party/abseil/absl/strings/internal/str_split_internal.h
deleted file mode 100644
index a2f41c1..0000000
--- a/third_party/abseil/absl/strings/internal/str_split_internal.h
+++ /dev/null
@@ -1,430 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// This file declares INTERNAL parts of the Split API that are inline/templated
-// or otherwise need to be available at compile time. The main abstractions
-// defined in here are
-//
-//   - ConvertibleToStringView
-//   - SplitIterator<>
-//   - Splitter<>
-//
-// DO NOT INCLUDE THIS FILE DIRECTLY. Use this file by including
-// absl/strings/str_split.h.
-//
-// IWYU pragma: private, include "absl/strings/str_split.h"
-
-#ifndef ABSL_STRINGS_INTERNAL_STR_SPLIT_INTERNAL_H_
-#define ABSL_STRINGS_INTERNAL_STR_SPLIT_INTERNAL_H_
-
-#include <array>
-#include <initializer_list>
-#include <iterator>
-#include <map>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-
-#ifdef _GLIBCXX_DEBUG
-#include "absl/strings/internal/stl_type_traits.h"
-#endif  // _GLIBCXX_DEBUG
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// This class is implicitly constructible from everything that absl::string_view
-// is implicitly constructible from, except for rvalue strings.  This means it
-// can be used as a function parameter in places where passing a temporary
-// string might cause memory lifetime issues.
-class ConvertibleToStringView {
- public:
-  ConvertibleToStringView(const char* s)  // NOLINT(runtime/explicit)
-      : value_(s) {}
-  ConvertibleToStringView(char* s) : value_(s) {}  // NOLINT(runtime/explicit)
-  ConvertibleToStringView(absl::string_view s)     // NOLINT(runtime/explicit)
-      : value_(s) {}
-  ConvertibleToStringView(const std::string& s)  // NOLINT(runtime/explicit)
-      : value_(s) {}
-
-  // Matches rvalue strings and moves their data to a member.
-  ConvertibleToStringView(std::string&& s) = delete;
-  ConvertibleToStringView(const std::string&& s) = delete;
-
-  absl::string_view value() const { return value_; }
-
- private:
-  absl::string_view value_;
-};
-
-// An iterator that enumerates the parts of a string from a Splitter. The text
-// to be split, the Delimiter, and the Predicate are all taken from the given
-// Splitter object. Iterators may only be compared if they refer to the same
-// Splitter instance.
-//
-// This class is NOT part of the public splitting API.
-template <typename Splitter>
-class SplitIterator {
- public:
-  using iterator_category = std::input_iterator_tag;
-  using value_type = absl::string_view;
-  using difference_type = ptrdiff_t;
-  using pointer = const value_type*;
-  using reference = const value_type&;
-
-  enum State { kInitState, kLastState, kEndState };
-  SplitIterator(State state, const Splitter* splitter)
-      : pos_(0),
-        state_(state),
-        splitter_(splitter),
-        delimiter_(splitter->delimiter()),
-        predicate_(splitter->predicate()) {
-    // Hack to maintain backward compatibility. This one block makes it so an
-    // empty absl::string_view whose .data() happens to be nullptr behaves
-    // *differently* from an otherwise empty absl::string_view whose .data() is
-    // not nullptr. This is an undesirable difference in general, but this
-    // behavior is maintained to avoid breaking existing code that happens to
-    // depend on this old behavior/bug. Perhaps it will be fixed one day. The
-    // difference in behavior is as follows:
-    //   Split(absl::string_view(""), '-');  // {""}
-    //   Split(absl::string_view(), '-');    // {}
-    if (splitter_->text().data() == nullptr) {
-      state_ = kEndState;
-      pos_ = splitter_->text().size();
-      return;
-    }
-
-    if (state_ == kEndState) {
-      pos_ = splitter_->text().size();
-    } else {
-      ++(*this);
-    }
-  }
-
-  bool at_end() const { return state_ == kEndState; }
-
-  reference operator*() const { return curr_; }
-  pointer operator->() const { return &curr_; }
-
-  SplitIterator& operator++() {
-    do {
-      if (state_ == kLastState) {
-        state_ = kEndState;
-        return *this;
-      }
-      const absl::string_view text = splitter_->text();
-      const absl::string_view d = delimiter_.Find(text, pos_);
-      if (d.data() == text.data() + text.size()) state_ = kLastState;
-      curr_ = text.substr(pos_, d.data() - (text.data() + pos_));
-      pos_ += curr_.size() + d.size();
-    } while (!predicate_(curr_));
-    return *this;
-  }
-
-  SplitIterator operator++(int) {
-    SplitIterator old(*this);
-    ++(*this);
-    return old;
-  }
-
-  friend bool operator==(const SplitIterator& a, const SplitIterator& b) {
-    return a.state_ == b.state_ && a.pos_ == b.pos_;
-  }
-
-  friend bool operator!=(const SplitIterator& a, const SplitIterator& b) {
-    return !(a == b);
-  }
-
- private:
-  size_t pos_;
-  State state_;
-  absl::string_view curr_;
-  const Splitter* splitter_;
-  typename Splitter::DelimiterType delimiter_;
-  typename Splitter::PredicateType predicate_;
-};
-
-// HasMappedType<T>::value is true iff there exists a type T::mapped_type.
-template <typename T, typename = void>
-struct HasMappedType : std::false_type {};
-template <typename T>
-struct HasMappedType<T, absl::void_t<typename T::mapped_type>>
-    : std::true_type {};
-
-// HasValueType<T>::value is true iff there exists a type T::value_type.
-template <typename T, typename = void>
-struct HasValueType : std::false_type {};
-template <typename T>
-struct HasValueType<T, absl::void_t<typename T::value_type>> : std::true_type {
-};
-
-// HasConstIterator<T>::value is true iff there exists a type T::const_iterator.
-template <typename T, typename = void>
-struct HasConstIterator : std::false_type {};
-template <typename T>
-struct HasConstIterator<T, absl::void_t<typename T::const_iterator>>
-    : std::true_type {};
-
-// IsInitializerList<T>::value is true iff T is an std::initializer_list. More
-// details below in Splitter<> where this is used.
-std::false_type IsInitializerListDispatch(...);  // default: No
-template <typename T>
-std::true_type IsInitializerListDispatch(std::initializer_list<T>*);
-template <typename T>
-struct IsInitializerList
-    : decltype(IsInitializerListDispatch(static_cast<T*>(nullptr))) {};
-
-// A SplitterIsConvertibleTo<C>::type alias exists iff the specified condition
-// is true for type 'C'.
-//
-// Restricts conversion to container-like types (by testing for the presence of
-// a const_iterator member type) and also to disable conversion to an
-// std::initializer_list (which also has a const_iterator). Otherwise, code
-// compiled in C++11 will get an error due to ambiguous conversion paths (in
-// C++11 std::vector<T>::operator= is overloaded to take either a std::vector<T>
-// or an std::initializer_list<T>).
-
-template <typename C, bool has_value_type, bool has_mapped_type>
-struct SplitterIsConvertibleToImpl : std::false_type {};
-
-template <typename C>
-struct SplitterIsConvertibleToImpl<C, true, false>
-    : std::is_constructible<typename C::value_type, absl::string_view> {};
-
-template <typename C>
-struct SplitterIsConvertibleToImpl<C, true, true>
-    : absl::conjunction<
-          std::is_constructible<typename C::key_type, absl::string_view>,
-          std::is_constructible<typename C::mapped_type, absl::string_view>> {};
-
-template <typename C>
-struct SplitterIsConvertibleTo
-    : SplitterIsConvertibleToImpl<
-          C,
-#ifdef _GLIBCXX_DEBUG
-          !IsStrictlyBaseOfAndConvertibleToSTLContainer<C>::value &&
-#endif  // _GLIBCXX_DEBUG
-              !IsInitializerList<
-                  typename std::remove_reference<C>::type>::value &&
-              HasValueType<C>::value && HasConstIterator<C>::value,
-          HasMappedType<C>::value> {
-};
-
-// This class implements the range that is returned by absl::StrSplit(). This
-// class has templated conversion operators that allow it to be implicitly
-// converted to a variety of types that the caller may have specified on the
-// left-hand side of an assignment.
-//
-// The main interface for interacting with this class is through its implicit
-// conversion operators. However, this class may also be used like a container
-// in that it has .begin() and .end() member functions. It may also be used
-// within a range-for loop.
-//
-// Output containers can be collections of any type that is constructible from
-// an absl::string_view.
-//
-// An Predicate functor may be supplied. This predicate will be used to filter
-// the split strings: only strings for which the predicate returns true will be
-// kept. A Predicate object is any unary functor that takes an absl::string_view
-// and returns bool.
-//
-// The StringType parameter can be either string_view or string, depending on
-// whether the Splitter refers to a string stored elsewhere, or if the string
-// resides inside the Splitter itself.
-template <typename Delimiter, typename Predicate, typename StringType>
-class Splitter {
- public:
-  using DelimiterType = Delimiter;
-  using PredicateType = Predicate;
-  using const_iterator = strings_internal::SplitIterator<Splitter>;
-  using value_type = typename std::iterator_traits<const_iterator>::value_type;
-
-  Splitter(StringType input_text, Delimiter d, Predicate p)
-      : text_(std::move(input_text)),
-        delimiter_(std::move(d)),
-        predicate_(std::move(p)) {}
-
-  absl::string_view text() const { return text_; }
-  const Delimiter& delimiter() const { return delimiter_; }
-  const Predicate& predicate() const { return predicate_; }
-
-  // Range functions that iterate the split substrings as absl::string_view
-  // objects. These methods enable a Splitter to be used in a range-based for
-  // loop.
-  const_iterator begin() const { return {const_iterator::kInitState, this}; }
-  const_iterator end() const { return {const_iterator::kEndState, this}; }
-
-  // An implicit conversion operator that is restricted to only those containers
-  // that the splitter is convertible to.
-  template <typename Container,
-            typename = typename std::enable_if<
-                SplitterIsConvertibleTo<Container>::value>::type>
-  operator Container() const {  // NOLINT(runtime/explicit)
-    return ConvertToContainer<Container, typename Container::value_type,
-                              HasMappedType<Container>::value>()(*this);
-  }
-
-  // Returns a pair with its .first and .second members set to the first two
-  // strings returned by the begin() iterator. Either/both of .first and .second
-  // will be constructed with empty strings if the iterator doesn't have a
-  // corresponding value.
-  template <typename First, typename Second>
-  operator std::pair<First, Second>() const {  // NOLINT(runtime/explicit)
-    absl::string_view first, second;
-    auto it = begin();
-    if (it != end()) {
-      first = *it;
-      if (++it != end()) {
-        second = *it;
-      }
-    }
-    return {First(first), Second(second)};
-  }
-
- private:
-  // ConvertToContainer is a functor converting a Splitter to the requested
-  // Container of ValueType. It is specialized below to optimize splitting to
-  // certain combinations of Container and ValueType.
-  //
-  // This base template handles the generic case of storing the split results in
-  // the requested non-map-like container and converting the split substrings to
-  // the requested type.
-  template <typename Container, typename ValueType, bool is_map = false>
-  struct ConvertToContainer {
-    Container operator()(const Splitter& splitter) const {
-      Container c;
-      auto it = std::inserter(c, c.end());
-      for (const auto& sp : splitter) {
-        *it++ = ValueType(sp);
-      }
-      return c;
-    }
-  };
-
-  // Partial specialization for a std::vector<absl::string_view>.
-  //
-  // Optimized for the common case of splitting to a
-  // std::vector<absl::string_view>. In this case we first split the results to
-  // a small array of absl::string_view on the stack, to reduce reallocations.
-  template <typename A>
-  struct ConvertToContainer<std::vector<absl::string_view, A>,
-                            absl::string_view, false> {
-    std::vector<absl::string_view, A> operator()(
-        const Splitter& splitter) const {
-      struct raw_view {
-        const char* data;
-        size_t size;
-        operator absl::string_view() const {  // NOLINT(runtime/explicit)
-          return {data, size};
-        }
-      };
-      std::vector<absl::string_view, A> v;
-      std::array<raw_view, 16> ar;
-      for (auto it = splitter.begin(); !it.at_end();) {
-        size_t index = 0;
-        do {
-          ar[index].data = it->data();
-          ar[index].size = it->size();
-          ++it;
-        } while (++index != ar.size() && !it.at_end());
-        v.insert(v.end(), ar.begin(), ar.begin() + index);
-      }
-      return v;
-    }
-  };
-
-  // Partial specialization for a std::vector<std::string>.
-  //
-  // Optimized for the common case of splitting to a std::vector<std::string>.
-  // In this case we first split the results to a std::vector<absl::string_view>
-  // so the returned std::vector<std::string> can have space reserved to avoid
-  // std::string moves.
-  template <typename A>
-  struct ConvertToContainer<std::vector<std::string, A>, std::string, false> {
-    std::vector<std::string, A> operator()(const Splitter& splitter) const {
-      const std::vector<absl::string_view> v = splitter;
-      return std::vector<std::string, A>(v.begin(), v.end());
-    }
-  };
-
-  // Partial specialization for containers of pairs (e.g., maps).
-  //
-  // The algorithm is to insert a new pair into the map for each even-numbered
-  // item, with the even-numbered item as the key with a default-constructed
-  // value. Each odd-numbered item will then be assigned to the last pair's
-  // value.
-  template <typename Container, typename First, typename Second>
-  struct ConvertToContainer<Container, std::pair<const First, Second>, true> {
-    Container operator()(const Splitter& splitter) const {
-      Container m;
-      typename Container::iterator it;
-      bool insert = true;
-      for (const auto& sp : splitter) {
-        if (insert) {
-          it = Inserter<Container>::Insert(&m, First(sp), Second());
-        } else {
-          it->second = Second(sp);
-        }
-        insert = !insert;
-      }
-      return m;
-    }
-
-    // Inserts the key and value into the given map, returning an iterator to
-    // the inserted item. Specialized for std::map and std::multimap to use
-    // emplace() and adapt emplace()'s return value.
-    template <typename Map>
-    struct Inserter {
-      using M = Map;
-      template <typename... Args>
-      static typename M::iterator Insert(M* m, Args&&... args) {
-        return m->insert(std::make_pair(std::forward<Args>(args)...)).first;
-      }
-    };
-
-    template <typename... Ts>
-    struct Inserter<std::map<Ts...>> {
-      using M = std::map<Ts...>;
-      template <typename... Args>
-      static typename M::iterator Insert(M* m, Args&&... args) {
-        return m->emplace(std::make_pair(std::forward<Args>(args)...)).first;
-      }
-    };
-
-    template <typename... Ts>
-    struct Inserter<std::multimap<Ts...>> {
-      using M = std::multimap<Ts...>;
-      template <typename... Args>
-      static typename M::iterator Insert(M* m, Args&&... args) {
-        return m->emplace(std::make_pair(std::forward<Args>(args)...));
-      }
-    };
-  };
-
-  StringType text_;
-  Delimiter delimiter_;
-  Predicate predicate_;
-};
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STR_SPLIT_INTERNAL_H_
diff --git a/third_party/abseil/absl/strings/internal/string_constant.h b/third_party/abseil/absl/strings/internal/string_constant.h
deleted file mode 100644
index a11336b..0000000
--- a/third_party/abseil/absl/strings/internal/string_constant.h
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_
-#define ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_
-
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// StringConstant<T> represents a compile time string constant.
-// It can be accessed via its `absl::string_view value` static member.
-// It is guaranteed that the `string_view` returned has constant `.data()`,
-// constant `.size()` and constant `value[i]` for all `0 <= i < .size()`
-//
-// The `T` is an opaque type. It is guaranteed that different string constants
-// will have different values of `T`. This allows users to associate the string
-// constant with other static state at compile time.
-//
-// Instances should be made using the `MakeStringConstant()` factory function
-// below.
-template <typename T>
-struct StringConstant {
-  static constexpr absl::string_view value = T{}();
-  constexpr absl::string_view operator()() const { return value; }
-
-  // Check to be sure `view` points to constant data.
-  // Otherwise, it can't be constant evaluated.
-  static_assert(value.empty() || 2 * value[0] != 1,
-                "The input string_view must point to constant data.");
-};
-
-template <typename T>
-constexpr absl::string_view StringConstant<T>::value;  // NOLINT
-
-// Factory function for `StringConstant` instances.
-// It supports callables that have a constexpr default constructor and a
-// constexpr operator().
-// It must return an `absl::string_view` or `const char*` pointing to constant
-// data. This is validated at compile time.
-template <typename T>
-constexpr StringConstant<T> MakeStringConstant(T) {
-  return {};
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_
diff --git a/third_party/abseil/absl/strings/internal/string_constant_test.cc b/third_party/abseil/absl/strings/internal/string_constant_test.cc
deleted file mode 100644
index 392833c..0000000
--- a/third_party/abseil/absl/strings/internal/string_constant_test.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/string_constant.h"
-
-#include "absl/meta/type_traits.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-using absl::strings_internal::MakeStringConstant;
-
-struct Callable {
-  constexpr absl::string_view operator()() const {
-    return absl::string_view("Callable", 8);
-  }
-};
-
-TEST(StringConstant, Traits) {
-  constexpr auto str = MakeStringConstant(Callable{});
-  using T = decltype(str);
-
-  EXPECT_TRUE(std::is_empty<T>::value);
-  EXPECT_TRUE(std::is_trivial<T>::value);
-  EXPECT_TRUE(absl::is_trivially_default_constructible<T>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<T>::value);
-  EXPECT_TRUE(absl::is_trivially_move_constructible<T>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<T>::value);
-}
-
-TEST(StringConstant, MakeFromCallable) {
-  constexpr auto str = MakeStringConstant(Callable{});
-  using T = decltype(str);
-  EXPECT_EQ(Callable{}(), T::value);
-  EXPECT_EQ(Callable{}(), str());
-}
-
-TEST(StringConstant, MakeFromStringConstant) {
-  // We want to make sure the StringConstant itself is a valid input to the
-  // factory function.
-  constexpr auto str = MakeStringConstant(Callable{});
-  constexpr auto str2 = MakeStringConstant(str);
-  using T = decltype(str2);
-  EXPECT_EQ(Callable{}(), T::value);
-  EXPECT_EQ(Callable{}(), str2());
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/internal/utf8.cc b/third_party/abseil/absl/strings/internal/utf8.cc
deleted file mode 100644
index 8fd8edc..0000000
--- a/third_party/abseil/absl/strings/internal/utf8.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// UTF8 utilities, implemented to reduce dependencies.
-
-#include "absl/strings/internal/utf8.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-size_t EncodeUTF8Char(char *buffer, char32_t utf8_char) {
-  if (utf8_char <= 0x7F) {
-    *buffer = static_cast<char>(utf8_char);
-    return 1;
-  } else if (utf8_char <= 0x7FF) {
-    buffer[1] = 0x80 | (utf8_char & 0x3F);
-    utf8_char >>= 6;
-    buffer[0] = 0xC0 | utf8_char;
-    return 2;
-  } else if (utf8_char <= 0xFFFF) {
-    buffer[2] = 0x80 | (utf8_char & 0x3F);
-    utf8_char >>= 6;
-    buffer[1] = 0x80 | (utf8_char & 0x3F);
-    utf8_char >>= 6;
-    buffer[0] = 0xE0 | utf8_char;
-    return 3;
-  } else {
-    buffer[3] = 0x80 | (utf8_char & 0x3F);
-    utf8_char >>= 6;
-    buffer[2] = 0x80 | (utf8_char & 0x3F);
-    utf8_char >>= 6;
-    buffer[1] = 0x80 | (utf8_char & 0x3F);
-    utf8_char >>= 6;
-    buffer[0] = 0xF0 | utf8_char;
-    return 4;
-  }
-}
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/internal/utf8.h b/third_party/abseil/absl/strings/internal/utf8.h
deleted file mode 100644
index 32fb109..0000000
--- a/third_party/abseil/absl/strings/internal/utf8.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// UTF8 utilities, implemented to reduce dependencies.
-
-#ifndef ABSL_STRINGS_INTERNAL_UTF8_H_
-#define ABSL_STRINGS_INTERNAL_UTF8_H_
-
-#include <cstddef>
-#include <cstdint>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-// For Unicode code points 0 through 0x10FFFF, EncodeUTF8Char writes
-// out the UTF-8 encoding into buffer, and returns the number of chars
-// it wrote.
-//
-// As described in https://tools.ietf.org/html/rfc3629#section-3 , the encodings
-// are:
-//    00 -     7F : 0xxxxxxx
-//    80 -    7FF : 110xxxxx 10xxxxxx
-//   800 -   FFFF : 1110xxxx 10xxxxxx 10xxxxxx
-// 10000 - 10FFFF : 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-//
-// Values greater than 0x10FFFF are not supported and may or may not write
-// characters into buffer, however never will more than kMaxEncodedUTF8Size
-// bytes be written, regardless of the value of utf8_char.
-enum { kMaxEncodedUTF8Size = 4 };
-size_t EncodeUTF8Char(char *buffer, char32_t utf8_char);
-
-}  // namespace strings_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_UTF8_H_
diff --git a/third_party/abseil/absl/strings/internal/utf8_test.cc b/third_party/abseil/absl/strings/internal/utf8_test.cc
deleted file mode 100644
index 88dd503..0000000
--- a/third_party/abseil/absl/strings/internal/utf8_test.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/internal/utf8.h"
-
-#include <cstdint>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/base/port.h"
-
-namespace {
-
-#if !defined(__cpp_char8_t)
-#if defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wc++2a-compat"
-#endif
-TEST(EncodeUTF8Char, BasicFunction) {
-  std::pair<char32_t, std::string> tests[] = {{0x0030, u8"\u0030"},
-                                              {0x00A3, u8"\u00A3"},
-                                              {0x00010000, u8"\U00010000"},
-                                              {0x0000FFFF, u8"\U0000FFFF"},
-                                              {0x0010FFFD, u8"\U0010FFFD"}};
-  for (auto &test : tests) {
-    char buf0[7] = {'\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00'};
-    char buf1[7] = {'\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF'};
-    char *buf0_written =
-        &buf0[absl::strings_internal::EncodeUTF8Char(buf0, test.first)];
-    char *buf1_written =
-        &buf1[absl::strings_internal::EncodeUTF8Char(buf1, test.first)];
-    int apparent_length = 7;
-    while (buf0[apparent_length - 1] == '\x00' &&
-           buf1[apparent_length - 1] == '\xFF') {
-      if (--apparent_length == 0) break;
-    }
-    EXPECT_EQ(apparent_length, buf0_written - buf0);
-    EXPECT_EQ(apparent_length, buf1_written - buf1);
-    EXPECT_EQ(apparent_length, test.second.length());
-    EXPECT_EQ(std::string(buf0, apparent_length), test.second);
-    EXPECT_EQ(std::string(buf1, apparent_length), test.second);
-  }
-  char buf[32] = "Don't Tread On Me";
-  EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf, 0x00110000),
-            absl::strings_internal::kMaxEncodedUTF8Size);
-  char buf2[32] = "Negative is invalid but sane";
-  EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf2, -1),
-            absl::strings_internal::kMaxEncodedUTF8Size);
-}
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-#endif  // !defined(__cpp_char8_t)
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/match.cc b/third_party/abseil/absl/strings/match.cc
deleted file mode 100644
index 2d67250..0000000
--- a/third_party/abseil/absl/strings/match.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/match.h"
-
-#include "absl/strings/internal/memutil.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-bool EqualsIgnoreCase(absl::string_view piece1,
-                      absl::string_view piece2) noexcept {
-  return (piece1.size() == piece2.size() &&
-          0 == absl::strings_internal::memcasecmp(piece1.data(), piece2.data(),
-                                                  piece1.size()));
-  // memcasecmp uses absl::ascii_tolower().
-}
-
-bool StartsWithIgnoreCase(absl::string_view text,
-                          absl::string_view prefix) noexcept {
-  return (text.size() >= prefix.size()) &&
-         EqualsIgnoreCase(text.substr(0, prefix.size()), prefix);
-}
-
-bool EndsWithIgnoreCase(absl::string_view text,
-                        absl::string_view suffix) noexcept {
-  return (text.size() >= suffix.size()) &&
-         EqualsIgnoreCase(text.substr(text.size() - suffix.size()), suffix);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/match.h b/third_party/abseil/absl/strings/match.h
deleted file mode 100644
index 038cbb3..0000000
--- a/third_party/abseil/absl/strings/match.h
+++ /dev/null
@@ -1,100 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: match.h
-// -----------------------------------------------------------------------------
-//
-// This file contains simple utilities for performing string matching checks.
-// All of these function parameters are specified as `absl::string_view`,
-// meaning that these functions can accept `std::string`, `absl::string_view` or
-// NUL-terminated C-style strings.
-//
-// Examples:
-//   std::string s = "foo";
-//   absl::string_view sv = "f";
-//   assert(absl::StrContains(s, sv));
-//
-// Note: The order of parameters in these functions is designed to mimic the
-// order an equivalent member function would exhibit;
-// e.g. `s.Contains(x)` ==> `absl::StrContains(s, x).
-#ifndef ABSL_STRINGS_MATCH_H_
-#define ABSL_STRINGS_MATCH_H_
-
-#include <cstring>
-
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// StrContains()
-//
-// Returns whether a given string `haystack` contains the substring `needle`.
-inline bool StrContains(absl::string_view haystack,
-                        absl::string_view needle) noexcept {
-  return haystack.find(needle, 0) != haystack.npos;
-}
-
-inline bool StrContains(absl::string_view haystack, char needle) noexcept {
-  return haystack.find(needle) != haystack.npos;
-}
-
-// StartsWith()
-//
-// Returns whether a given string `text` begins with `prefix`.
-inline bool StartsWith(absl::string_view text,
-                       absl::string_view prefix) noexcept {
-  return prefix.empty() ||
-         (text.size() >= prefix.size() &&
-          memcmp(text.data(), prefix.data(), prefix.size()) == 0);
-}
-
-// EndsWith()
-//
-// Returns whether a given string `text` ends with `suffix`.
-inline bool EndsWith(absl::string_view text,
-                     absl::string_view suffix) noexcept {
-  return suffix.empty() ||
-         (text.size() >= suffix.size() &&
-          memcmp(text.data() + (text.size() - suffix.size()), suffix.data(),
-                 suffix.size()) == 0);
-}
-
-// EqualsIgnoreCase()
-//
-// Returns whether given ASCII strings `piece1` and `piece2` are equal, ignoring
-// case in the comparison.
-bool EqualsIgnoreCase(absl::string_view piece1,
-                      absl::string_view piece2) noexcept;
-
-// StartsWithIgnoreCase()
-//
-// Returns whether a given ASCII string `text` starts with `prefix`,
-// ignoring case in the comparison.
-bool StartsWithIgnoreCase(absl::string_view text,
-                          absl::string_view prefix) noexcept;
-
-// EndsWithIgnoreCase()
-//
-// Returns whether a given ASCII string `text` ends with `suffix`, ignoring
-// case in the comparison.
-bool EndsWithIgnoreCase(absl::string_view text,
-                        absl::string_view suffix) noexcept;
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_MATCH_H_
diff --git a/third_party/abseil/absl/strings/match_test.cc b/third_party/abseil/absl/strings/match_test.cc
deleted file mode 100644
index 5841bc1..0000000
--- a/third_party/abseil/absl/strings/match_test.cc
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/match.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(MatchTest, StartsWith) {
-  const std::string s1("123\0abc", 7);
-  const absl::string_view a("foobar");
-  const absl::string_view b(s1);
-  const absl::string_view e;
-  EXPECT_TRUE(absl::StartsWith(a, a));
-  EXPECT_TRUE(absl::StartsWith(a, "foo"));
-  EXPECT_TRUE(absl::StartsWith(a, e));
-  EXPECT_TRUE(absl::StartsWith(b, s1));
-  EXPECT_TRUE(absl::StartsWith(b, b));
-  EXPECT_TRUE(absl::StartsWith(b, e));
-  EXPECT_TRUE(absl::StartsWith(e, ""));
-  EXPECT_FALSE(absl::StartsWith(a, b));
-  EXPECT_FALSE(absl::StartsWith(b, a));
-  EXPECT_FALSE(absl::StartsWith(e, a));
-}
-
-TEST(MatchTest, EndsWith) {
-  const std::string s1("123\0abc", 7);
-  const absl::string_view a("foobar");
-  const absl::string_view b(s1);
-  const absl::string_view e;
-  EXPECT_TRUE(absl::EndsWith(a, a));
-  EXPECT_TRUE(absl::EndsWith(a, "bar"));
-  EXPECT_TRUE(absl::EndsWith(a, e));
-  EXPECT_TRUE(absl::EndsWith(b, s1));
-  EXPECT_TRUE(absl::EndsWith(b, b));
-  EXPECT_TRUE(absl::EndsWith(b, e));
-  EXPECT_TRUE(absl::EndsWith(e, ""));
-  EXPECT_FALSE(absl::EndsWith(a, b));
-  EXPECT_FALSE(absl::EndsWith(b, a));
-  EXPECT_FALSE(absl::EndsWith(e, a));
-}
-
-TEST(MatchTest, Contains) {
-  absl::string_view a("abcdefg");
-  absl::string_view b("abcd");
-  absl::string_view c("efg");
-  absl::string_view d("gh");
-  EXPECT_TRUE(absl::StrContains(a, a));
-  EXPECT_TRUE(absl::StrContains(a, b));
-  EXPECT_TRUE(absl::StrContains(a, c));
-  EXPECT_FALSE(absl::StrContains(a, d));
-  EXPECT_TRUE(absl::StrContains("", ""));
-  EXPECT_TRUE(absl::StrContains("abc", ""));
-  EXPECT_FALSE(absl::StrContains("", "a"));
-}
-
-TEST(MatchTest, ContainsChar) {
-  absl::string_view a("abcdefg");
-  absl::string_view b("abcd");
-  EXPECT_TRUE(absl::StrContains(a, 'a'));
-  EXPECT_TRUE(absl::StrContains(a, 'b'));
-  EXPECT_TRUE(absl::StrContains(a, 'e'));
-  EXPECT_FALSE(absl::StrContains(a, 'h'));
-
-  EXPECT_TRUE(absl::StrContains(b, 'a'));
-  EXPECT_TRUE(absl::StrContains(b, 'b'));
-  EXPECT_FALSE(absl::StrContains(b, 'e'));
-  EXPECT_FALSE(absl::StrContains(b, 'h'));
-
-  EXPECT_FALSE(absl::StrContains("", 'a'));
-  EXPECT_FALSE(absl::StrContains("", 'a'));
-}
-
-TEST(MatchTest, ContainsNull) {
-  const std::string s = "foo";
-  const char* cs = "foo";
-  const absl::string_view sv("foo");
-  const absl::string_view sv2("foo\0bar", 4);
-  EXPECT_EQ(s, "foo");
-  EXPECT_EQ(sv, "foo");
-  EXPECT_NE(sv2, "foo");
-  EXPECT_TRUE(absl::EndsWith(s, sv));
-  EXPECT_TRUE(absl::StartsWith(cs, sv));
-  EXPECT_TRUE(absl::StrContains(cs, sv));
-  EXPECT_FALSE(absl::StrContains(cs, sv2));
-}
-
-TEST(MatchTest, EqualsIgnoreCase) {
-  std::string text = "the";
-  absl::string_view data(text);
-
-  EXPECT_TRUE(absl::EqualsIgnoreCase(data, "The"));
-  EXPECT_TRUE(absl::EqualsIgnoreCase(data, "THE"));
-  EXPECT_TRUE(absl::EqualsIgnoreCase(data, "the"));
-  EXPECT_FALSE(absl::EqualsIgnoreCase(data, "Quick"));
-  EXPECT_FALSE(absl::EqualsIgnoreCase(data, "then"));
-}
-
-TEST(MatchTest, StartsWithIgnoreCase) {
-  EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", "foo"));
-  EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", "Fo"));
-  EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", ""));
-  EXPECT_FALSE(absl::StartsWithIgnoreCase("foo", "fooo"));
-  EXPECT_FALSE(absl::StartsWithIgnoreCase("", "fo"));
-}
-
-TEST(MatchTest, EndsWithIgnoreCase) {
-  EXPECT_TRUE(absl::EndsWithIgnoreCase("foo", "foo"));
-  EXPECT_TRUE(absl::EndsWithIgnoreCase("foo", "Oo"));
-  EXPECT_TRUE(absl::EndsWithIgnoreCase("foo", ""));
-  EXPECT_FALSE(absl::EndsWithIgnoreCase("foo", "fooo"));
-  EXPECT_FALSE(absl::EndsWithIgnoreCase("", "fo"));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/numbers.cc b/third_party/abseil/absl/strings/numbers.cc
deleted file mode 100644
index e6bf44c..0000000
--- a/third_party/abseil/absl/strings/numbers.cc
+++ /dev/null
@@ -1,1083 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file contains string processing functions related to
-// numeric values.
-
-#include "absl/strings/numbers.h"
-
-#include <algorithm>
-#include <cassert>
-#include <cfloat>  // for DBL_DIG and FLT_DIG
-#include <cmath>   // for HUGE_VAL
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <utility>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/numeric/bits.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/charconv.h"
-#include "absl/strings/escaping.h"
-#include "absl/strings/internal/memutil.h"
-#include "absl/strings/match.h"
-#include "absl/strings/str_cat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-bool SimpleAtof(absl::string_view str, float* out) {
-  *out = 0.0;
-  str = StripAsciiWhitespace(str);
-  if (!str.empty() && str[0] == '+') {
-    str.remove_prefix(1);
-  }
-  auto result = absl::from_chars(str.data(), str.data() + str.size(), *out);
-  if (result.ec == std::errc::invalid_argument) {
-    return false;
-  }
-  if (result.ptr != str.data() + str.size()) {
-    // not all non-whitespace characters consumed
-    return false;
-  }
-  // from_chars() with DR 3081's current wording will return max() on
-  // overflow.  SimpleAtof returns infinity instead.
-  if (result.ec == std::errc::result_out_of_range) {
-    if (*out > 1.0) {
-      *out = std::numeric_limits<float>::infinity();
-    } else if (*out < -1.0) {
-      *out = -std::numeric_limits<float>::infinity();
-    }
-  }
-  return true;
-}
-
-bool SimpleAtod(absl::string_view str, double* out) {
-  *out = 0.0;
-  str = StripAsciiWhitespace(str);
-  if (!str.empty() && str[0] == '+') {
-    str.remove_prefix(1);
-  }
-  auto result = absl::from_chars(str.data(), str.data() + str.size(), *out);
-  if (result.ec == std::errc::invalid_argument) {
-    return false;
-  }
-  if (result.ptr != str.data() + str.size()) {
-    // not all non-whitespace characters consumed
-    return false;
-  }
-  // from_chars() with DR 3081's current wording will return max() on
-  // overflow.  SimpleAtod returns infinity instead.
-  if (result.ec == std::errc::result_out_of_range) {
-    if (*out > 1.0) {
-      *out = std::numeric_limits<double>::infinity();
-    } else if (*out < -1.0) {
-      *out = -std::numeric_limits<double>::infinity();
-    }
-  }
-  return true;
-}
-
-bool SimpleAtob(absl::string_view str, bool* out) {
-  ABSL_RAW_CHECK(out != nullptr, "Output pointer must not be nullptr.");
-  if (EqualsIgnoreCase(str, "true") || EqualsIgnoreCase(str, "t") ||
-      EqualsIgnoreCase(str, "yes") || EqualsIgnoreCase(str, "y") ||
-      EqualsIgnoreCase(str, "1")) {
-    *out = true;
-    return true;
-  }
-  if (EqualsIgnoreCase(str, "false") || EqualsIgnoreCase(str, "f") ||
-      EqualsIgnoreCase(str, "no") || EqualsIgnoreCase(str, "n") ||
-      EqualsIgnoreCase(str, "0")) {
-    *out = false;
-    return true;
-  }
-  return false;
-}
-
-// ----------------------------------------------------------------------
-// FastIntToBuffer() overloads
-//
-// Like the Fast*ToBuffer() functions above, these are intended for speed.
-// Unlike the Fast*ToBuffer() functions, however, these functions write
-// their output to the beginning of the buffer.  The caller is responsible
-// for ensuring that the buffer has enough space to hold the output.
-//
-// Returns a pointer to the end of the string (i.e. the null character
-// terminating the string).
-// ----------------------------------------------------------------------
-
-namespace {
-
-// Used to optimize printing a decimal number's final digit.
-const char one_ASCII_final_digits[10][2] {
-  {'0', 0}, {'1', 0}, {'2', 0}, {'3', 0}, {'4', 0},
-  {'5', 0}, {'6', 0}, {'7', 0}, {'8', 0}, {'9', 0},
-};
-
-}  // namespace
-
-char* numbers_internal::FastIntToBuffer(uint32_t i, char* buffer) {
-  uint32_t digits;
-  // The idea of this implementation is to trim the number of divides to as few
-  // as possible, and also reducing memory stores and branches, by going in
-  // steps of two digits at a time rather than one whenever possible.
-  // The huge-number case is first, in the hopes that the compiler will output
-  // that case in one branch-free block of code, and only output conditional
-  // branches into it from below.
-  if (i >= 1000000000) {     // >= 1,000,000,000
-    digits = i / 100000000;  //      100,000,000
-    i -= digits * 100000000;
-    PutTwoDigits(digits, buffer);
-    buffer += 2;
-  lt100_000_000:
-    digits = i / 1000000;  // 1,000,000
-    i -= digits * 1000000;
-    PutTwoDigits(digits, buffer);
-    buffer += 2;
-  lt1_000_000:
-    digits = i / 10000;  // 10,000
-    i -= digits * 10000;
-    PutTwoDigits(digits, buffer);
-    buffer += 2;
-  lt10_000:
-    digits = i / 100;
-    i -= digits * 100;
-    PutTwoDigits(digits, buffer);
-    buffer += 2;
- lt100:
-    digits = i;
-    PutTwoDigits(digits, buffer);
-    buffer += 2;
-    *buffer = 0;
-    return buffer;
-  }
-
-  if (i < 100) {
-    digits = i;
-    if (i >= 10) goto lt100;
-    memcpy(buffer, one_ASCII_final_digits[i], 2);
-    return buffer + 1;
-  }
-  if (i < 10000) {  //    10,000
-    if (i >= 1000) goto lt10_000;
-    digits = i / 100;
-    i -= digits * 100;
-    *buffer++ = '0' + digits;
-    goto lt100;
-  }
-  if (i < 1000000) {  //    1,000,000
-    if (i >= 100000) goto lt1_000_000;
-    digits = i / 10000;  //    10,000
-    i -= digits * 10000;
-    *buffer++ = '0' + digits;
-    goto lt10_000;
-  }
-  if (i < 100000000) {  //    100,000,000
-    if (i >= 10000000) goto lt100_000_000;
-    digits = i / 1000000;  //   1,000,000
-    i -= digits * 1000000;
-    *buffer++ = '0' + digits;
-    goto lt1_000_000;
-  }
-  // we already know that i < 1,000,000,000
-  digits = i / 100000000;  //   100,000,000
-  i -= digits * 100000000;
-  *buffer++ = '0' + digits;
-  goto lt100_000_000;
-}
-
-char* numbers_internal::FastIntToBuffer(int32_t i, char* buffer) {
-  uint32_t u = i;
-  if (i < 0) {
-    *buffer++ = '-';
-    // We need to do the negation in modular (i.e., "unsigned")
-    // arithmetic; MSVC++ apprently warns for plain "-u", so
-    // we write the equivalent expression "0 - u" instead.
-    u = 0 - u;
-  }
-  return numbers_internal::FastIntToBuffer(u, buffer);
-}
-
-char* numbers_internal::FastIntToBuffer(uint64_t i, char* buffer) {
-  uint32_t u32 = static_cast<uint32_t>(i);
-  if (u32 == i) return numbers_internal::FastIntToBuffer(u32, buffer);
-
-  // Here we know i has at least 10 decimal digits.
-  uint64_t top_1to11 = i / 1000000000;
-  u32 = static_cast<uint32_t>(i - top_1to11 * 1000000000);
-  uint32_t top_1to11_32 = static_cast<uint32_t>(top_1to11);
-
-  if (top_1to11_32 == top_1to11) {
-    buffer = numbers_internal::FastIntToBuffer(top_1to11_32, buffer);
-  } else {
-    // top_1to11 has more than 32 bits too; print it in two steps.
-    uint32_t top_8to9 = static_cast<uint32_t>(top_1to11 / 100);
-    uint32_t mid_2 = static_cast<uint32_t>(top_1to11 - top_8to9 * 100);
-    buffer = numbers_internal::FastIntToBuffer(top_8to9, buffer);
-    PutTwoDigits(mid_2, buffer);
-    buffer += 2;
-  }
-
-  // We have only 9 digits now, again the maximum uint32_t can handle fully.
-  uint32_t digits = u32 / 10000000;  // 10,000,000
-  u32 -= digits * 10000000;
-  PutTwoDigits(digits, buffer);
-  buffer += 2;
-  digits = u32 / 100000;  // 100,000
-  u32 -= digits * 100000;
-  PutTwoDigits(digits, buffer);
-  buffer += 2;
-  digits = u32 / 1000;  // 1,000
-  u32 -= digits * 1000;
-  PutTwoDigits(digits, buffer);
-  buffer += 2;
-  digits = u32 / 10;
-  u32 -= digits * 10;
-  PutTwoDigits(digits, buffer);
-  buffer += 2;
-  memcpy(buffer, one_ASCII_final_digits[u32], 2);
-  return buffer + 1;
-}
-
-char* numbers_internal::FastIntToBuffer(int64_t i, char* buffer) {
-  uint64_t u = i;
-  if (i < 0) {
-    *buffer++ = '-';
-    u = 0 - u;
-  }
-  return numbers_internal::FastIntToBuffer(u, buffer);
-}
-
-// Given a 128-bit number expressed as a pair of uint64_t, high half first,
-// return that number multiplied by the given 32-bit value.  If the result is
-// too large to fit in a 128-bit number, divide it by 2 until it fits.
-static std::pair<uint64_t, uint64_t> Mul32(std::pair<uint64_t, uint64_t> num,
-                                           uint32_t mul) {
-  uint64_t bits0_31 = num.second & 0xFFFFFFFF;
-  uint64_t bits32_63 = num.second >> 32;
-  uint64_t bits64_95 = num.first & 0xFFFFFFFF;
-  uint64_t bits96_127 = num.first >> 32;
-
-  // The picture so far: each of these 64-bit values has only the lower 32 bits
-  // filled in.
-  // bits96_127:          [ 00000000 xxxxxxxx ]
-  // bits64_95:                    [ 00000000 xxxxxxxx ]
-  // bits32_63:                             [ 00000000 xxxxxxxx ]
-  // bits0_31:                                       [ 00000000 xxxxxxxx ]
-
-  bits0_31 *= mul;
-  bits32_63 *= mul;
-  bits64_95 *= mul;
-  bits96_127 *= mul;
-
-  // Now the top halves may also have value, though all 64 of their bits will
-  // never be set at the same time, since they are a result of a 32x32 bit
-  // multiply.  This makes the carry calculation slightly easier.
-  // bits96_127:          [ mmmmmmmm | mmmmmmmm ]
-  // bits64_95:                    [ | mmmmmmmm mmmmmmmm | ]
-  // bits32_63:                      |        [ mmmmmmmm | mmmmmmmm ]
-  // bits0_31:                       |                 [ | mmmmmmmm mmmmmmmm ]
-  // eventually:        [ bits128_up | ...bits64_127.... | ..bits0_63... ]
-
-  uint64_t bits0_63 = bits0_31 + (bits32_63 << 32);
-  uint64_t bits64_127 = bits64_95 + (bits96_127 << 32) + (bits32_63 >> 32) +
-                        (bits0_63 < bits0_31);
-  uint64_t bits128_up = (bits96_127 >> 32) + (bits64_127 < bits64_95);
-  if (bits128_up == 0) return {bits64_127, bits0_63};
-
-  auto shift = static_cast<unsigned>(bit_width(bits128_up));
-  uint64_t lo = (bits0_63 >> shift) + (bits64_127 << (64 - shift));
-  uint64_t hi = (bits64_127 >> shift) + (bits128_up << (64 - shift));
-  return {hi, lo};
-}
-
-// Compute num * 5 ^ expfive, and return the first 128 bits of the result,
-// where the first bit is always a one.  So PowFive(1, 0) starts 0b100000,
-// PowFive(1, 1) starts 0b101000, PowFive(1, 2) starts 0b110010, etc.
-static std::pair<uint64_t, uint64_t> PowFive(uint64_t num, int expfive) {
-  std::pair<uint64_t, uint64_t> result = {num, 0};
-  while (expfive >= 13) {
-    // 5^13 is the highest power of five that will fit in a 32-bit integer.
-    result = Mul32(result, 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5);
-    expfive -= 13;
-  }
-  constexpr int powers_of_five[13] = {
-      1,
-      5,
-      5 * 5,
-      5 * 5 * 5,
-      5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
-      5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5};
-  result = Mul32(result, powers_of_five[expfive & 15]);
-  int shift = countl_zero(result.first);
-  if (shift != 0) {
-    result.first = (result.first << shift) + (result.second >> (64 - shift));
-    result.second = (result.second << shift);
-  }
-  return result;
-}
-
-struct ExpDigits {
-  int32_t exponent;
-  char digits[6];
-};
-
-// SplitToSix converts value, a positive double-precision floating-point number,
-// into a base-10 exponent and 6 ASCII digits, where the first digit is never
-// zero.  For example, SplitToSix(1) returns an exponent of zero and a digits
-// array of {'1', '0', '0', '0', '0', '0'}.  If value is exactly halfway between
-// two possible representations, e.g. value = 100000.5, then "round to even" is
-// performed.
-static ExpDigits SplitToSix(const double value) {
-  ExpDigits exp_dig;
-  int exp = 5;
-  double d = value;
-  // First step: calculate a close approximation of the output, where the
-  // value d will be between 100,000 and 999,999, representing the digits
-  // in the output ASCII array, and exp is the base-10 exponent.  It would be
-  // faster to use a table here, and to look up the base-2 exponent of value,
-  // however value is an IEEE-754 64-bit number, so the table would have 2,000
-  // entries, which is not cache-friendly.
-  if (d >= 999999.5) {
-    if (d >= 1e+261) exp += 256, d *= 1e-256;
-    if (d >= 1e+133) exp += 128, d *= 1e-128;
-    if (d >= 1e+69) exp += 64, d *= 1e-64;
-    if (d >= 1e+37) exp += 32, d *= 1e-32;
-    if (d >= 1e+21) exp += 16, d *= 1e-16;
-    if (d >= 1e+13) exp += 8, d *= 1e-8;
-    if (d >= 1e+9) exp += 4, d *= 1e-4;
-    if (d >= 1e+7) exp += 2, d *= 1e-2;
-    if (d >= 1e+6) exp += 1, d *= 1e-1;
-  } else {
-    if (d < 1e-250) exp -= 256, d *= 1e256;
-    if (d < 1e-122) exp -= 128, d *= 1e128;
-    if (d < 1e-58) exp -= 64, d *= 1e64;
-    if (d < 1e-26) exp -= 32, d *= 1e32;
-    if (d < 1e-10) exp -= 16, d *= 1e16;
-    if (d < 1e-2) exp -= 8, d *= 1e8;
-    if (d < 1e+2) exp -= 4, d *= 1e4;
-    if (d < 1e+4) exp -= 2, d *= 1e2;
-    if (d < 1e+5) exp -= 1, d *= 1e1;
-  }
-  // At this point, d is in the range [99999.5..999999.5) and exp is in the
-  // range [-324..308]. Since we need to round d up, we want to add a half
-  // and truncate.
-  // However, the technique above may have lost some precision, due to its
-  // repeated multiplication by constants that each may be off by half a bit
-  // of precision.  This only matters if we're close to the edge though.
-  // Since we'd like to know if the fractional part of d is close to a half,
-  // we multiply it by 65536 and see if the fractional part is close to 32768.
-  // (The number doesn't have to be a power of two,but powers of two are faster)
-  uint64_t d64k = d * 65536;
-  int dddddd;  // A 6-digit decimal integer.
-  if ((d64k % 65536) == 32767 || (d64k % 65536) == 32768) {
-    // OK, it's fairly likely that precision was lost above, which is
-    // not a surprise given only 52 mantissa bits are available.  Therefore
-    // redo the calculation using 128-bit numbers.  (64 bits are not enough).
-
-    // Start out with digits rounded down; maybe add one below.
-    dddddd = static_cast<int>(d64k / 65536);
-
-    // mantissa is a 64-bit integer representing M.mmm... * 2^63.  The actual
-    // value we're representing, of course, is M.mmm... * 2^exp2.
-    int exp2;
-    double m = std::frexp(value, &exp2);
-    uint64_t mantissa = m * (32768.0 * 65536.0 * 65536.0 * 65536.0);
-    // std::frexp returns an m value in the range [0.5, 1.0), however we
-    // can't multiply it by 2^64 and convert to an integer because some FPUs
-    // throw an exception when converting an number higher than 2^63 into an
-    // integer - even an unsigned 64-bit integer!  Fortunately it doesn't matter
-    // since m only has 52 significant bits anyway.
-    mantissa <<= 1;
-    exp2 -= 64;  // not needed, but nice for debugging
-
-    // OK, we are here to compare:
-    //     (dddddd + 0.5) * 10^(exp-5)  vs.  mantissa * 2^exp2
-    // so we can round up dddddd if appropriate.  Those values span the full
-    // range of 600 orders of magnitude of IEE 64-bit floating-point.
-    // Fortunately, we already know they are very close, so we don't need to
-    // track the base-2 exponent of both sides.  This greatly simplifies the
-    // the math since the 2^exp2 calculation is unnecessary and the power-of-10
-    // calculation can become a power-of-5 instead.
-
-    std::pair<uint64_t, uint64_t> edge, val;
-    if (exp >= 6) {
-      // Compare (dddddd + 0.5) * 5 ^ (exp - 5) to mantissa
-      // Since we're tossing powers of two, 2 * dddddd + 1 is the
-      // same as dddddd + 0.5
-      edge = PowFive(2 * dddddd + 1, exp - 5);
-
-      val.first = mantissa;
-      val.second = 0;
-    } else {
-      // We can't compare (dddddd + 0.5) * 5 ^ (exp - 5) to mantissa as we did
-      // above because (exp - 5) is negative.  So we compare (dddddd + 0.5) to
-      // mantissa * 5 ^ (5 - exp)
-      edge = PowFive(2 * dddddd + 1, 0);
-
-      val = PowFive(mantissa, 5 - exp);
-    }
-    // printf("exp=%d %016lx %016lx vs %016lx %016lx\n", exp, val.first,
-    //        val.second, edge.first, edge.second);
-    if (val > edge) {
-      dddddd++;
-    } else if (val == edge) {
-      dddddd += (dddddd & 1);
-    }
-  } else {
-    // Here, we are not close to the edge.
-    dddddd = static_cast<int>((d64k + 32768) / 65536);
-  }
-  if (dddddd == 1000000) {
-    dddddd = 100000;
-    exp += 1;
-  }
-  exp_dig.exponent = exp;
-
-  int two_digits = dddddd / 10000;
-  dddddd -= two_digits * 10000;
-  numbers_internal::PutTwoDigits(two_digits, &exp_dig.digits[0]);
-
-  two_digits = dddddd / 100;
-  dddddd -= two_digits * 100;
-  numbers_internal::PutTwoDigits(two_digits, &exp_dig.digits[2]);
-
-  numbers_internal::PutTwoDigits(dddddd, &exp_dig.digits[4]);
-  return exp_dig;
-}
-
-// Helper function for fast formatting of floating-point.
-// The result is the same as "%g", a.k.a. "%.6g".
-size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
-  static_assert(std::numeric_limits<float>::is_iec559,
-                "IEEE-754/IEC-559 support only");
-
-  char* out = buffer;  // we write data to out, incrementing as we go, but
-                       // FloatToBuffer always returns the address of the buffer
-                       // passed in.
-
-  if (std::isnan(d)) {
-    strcpy(out, "nan");  // NOLINT(runtime/printf)
-    return 3;
-  }
-  if (d == 0) {  // +0 and -0 are handled here
-    if (std::signbit(d)) *out++ = '-';
-    *out++ = '0';
-    *out = 0;
-    return out - buffer;
-  }
-  if (d < 0) {
-    *out++ = '-';
-    d = -d;
-  }
-  if (std::isinf(d)) {
-    strcpy(out, "inf");  // NOLINT(runtime/printf)
-    return out + 3 - buffer;
-  }
-
-  auto exp_dig = SplitToSix(d);
-  int exp = exp_dig.exponent;
-  const char* digits = exp_dig.digits;
-  out[0] = '0';
-  out[1] = '.';
-  switch (exp) {
-    case 5:
-      memcpy(out, &digits[0], 6), out += 6;
-      *out = 0;
-      return out - buffer;
-    case 4:
-      memcpy(out, &digits[0], 5), out += 5;
-      if (digits[5] != '0') {
-        *out++ = '.';
-        *out++ = digits[5];
-      }
-      *out = 0;
-      return out - buffer;
-    case 3:
-      memcpy(out, &digits[0], 4), out += 4;
-      if ((digits[5] | digits[4]) != '0') {
-        *out++ = '.';
-        *out++ = digits[4];
-        if (digits[5] != '0') *out++ = digits[5];
-      }
-      *out = 0;
-      return out - buffer;
-    case 2:
-      memcpy(out, &digits[0], 3), out += 3;
-      *out++ = '.';
-      memcpy(out, &digits[3], 3);
-      out += 3;
-      while (out[-1] == '0') --out;
-      if (out[-1] == '.') --out;
-      *out = 0;
-      return out - buffer;
-    case 1:
-      memcpy(out, &digits[0], 2), out += 2;
-      *out++ = '.';
-      memcpy(out, &digits[2], 4);
-      out += 4;
-      while (out[-1] == '0') --out;
-      if (out[-1] == '.') --out;
-      *out = 0;
-      return out - buffer;
-    case 0:
-      memcpy(out, &digits[0], 1), out += 1;
-      *out++ = '.';
-      memcpy(out, &digits[1], 5);
-      out += 5;
-      while (out[-1] == '0') --out;
-      if (out[-1] == '.') --out;
-      *out = 0;
-      return out - buffer;
-    case -4:
-      out[2] = '0';
-      ++out;
-      ABSL_FALLTHROUGH_INTENDED;
-    case -3:
-      out[2] = '0';
-      ++out;
-      ABSL_FALLTHROUGH_INTENDED;
-    case -2:
-      out[2] = '0';
-      ++out;
-      ABSL_FALLTHROUGH_INTENDED;
-    case -1:
-      out += 2;
-      memcpy(out, &digits[0], 6);
-      out += 6;
-      while (out[-1] == '0') --out;
-      *out = 0;
-      return out - buffer;
-  }
-  assert(exp < -4 || exp >= 6);
-  out[0] = digits[0];
-  assert(out[1] == '.');
-  out += 2;
-  memcpy(out, &digits[1], 5), out += 5;
-  while (out[-1] == '0') --out;
-  if (out[-1] == '.') --out;
-  *out++ = 'e';
-  if (exp > 0) {
-    *out++ = '+';
-  } else {
-    *out++ = '-';
-    exp = -exp;
-  }
-  if (exp > 99) {
-    int dig1 = exp / 100;
-    exp -= dig1 * 100;
-    *out++ = '0' + dig1;
-  }
-  PutTwoDigits(exp, out);
-  out += 2;
-  *out = 0;
-  return out - buffer;
-}
-
-namespace {
-// Represents integer values of digits.
-// Uses 36 to indicate an invalid character since we support
-// bases up to 36.
-static const int8_t kAsciiToInt[256] = {
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,  // 16 36s.
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 0,  1,  2,  3,  4,  5,
-    6,  7,  8,  9,  36, 36, 36, 36, 36, 36, 36, 10, 11, 12, 13, 14, 15, 16, 17,
-    18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
-    36, 36, 36, 36, 36, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
-    24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
-    36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36};
-
-// Parse the sign and optional hex or oct prefix in text.
-inline bool safe_parse_sign_and_base(absl::string_view* text /*inout*/,
-                                     int* base_ptr /*inout*/,
-                                     bool* negative_ptr /*output*/) {
-  if (text->data() == nullptr) {
-    return false;
-  }
-
-  const char* start = text->data();
-  const char* end = start + text->size();
-  int base = *base_ptr;
-
-  // Consume whitespace.
-  while (start < end && absl::ascii_isspace(start[0])) {
-    ++start;
-  }
-  while (start < end && absl::ascii_isspace(end[-1])) {
-    --end;
-  }
-  if (start >= end) {
-    return false;
-  }
-
-  // Consume sign.
-  *negative_ptr = (start[0] == '-');
-  if (*negative_ptr || start[0] == '+') {
-    ++start;
-    if (start >= end) {
-      return false;
-    }
-  }
-
-  // Consume base-dependent prefix.
-  //  base 0: "0x" -> base 16, "0" -> base 8, default -> base 10
-  //  base 16: "0x" -> base 16
-  // Also validate the base.
-  if (base == 0) {
-    if (end - start >= 2 && start[0] == '0' &&
-        (start[1] == 'x' || start[1] == 'X')) {
-      base = 16;
-      start += 2;
-      if (start >= end) {
-        // "0x" with no digits after is invalid.
-        return false;
-      }
-    } else if (end - start >= 1 && start[0] == '0') {
-      base = 8;
-      start += 1;
-    } else {
-      base = 10;
-    }
-  } else if (base == 16) {
-    if (end - start >= 2 && start[0] == '0' &&
-        (start[1] == 'x' || start[1] == 'X')) {
-      start += 2;
-      if (start >= end) {
-        // "0x" with no digits after is invalid.
-        return false;
-      }
-    }
-  } else if (base >= 2 && base <= 36) {
-    // okay
-  } else {
-    return false;
-  }
-  *text = absl::string_view(start, end - start);
-  *base_ptr = base;
-  return true;
-}
-
-// Consume digits.
-//
-// The classic loop:
-//
-//   for each digit
-//     value = value * base + digit
-//   value *= sign
-//
-// The classic loop needs overflow checking.  It also fails on the most
-// negative integer, -2147483648 in 32-bit two's complement representation.
-//
-// My improved loop:
-//
-//  if (!negative)
-//    for each digit
-//      value = value * base
-//      value = value + digit
-//  else
-//    for each digit
-//      value = value * base
-//      value = value - digit
-//
-// Overflow checking becomes simple.
-
-// Lookup tables per IntType:
-// vmax/base and vmin/base are precomputed because division costs at least 8ns.
-// TODO(junyer): Doing this per base instead (i.e. an array of structs, not a
-// struct of arrays) would probably be better in terms of d-cache for the most
-// commonly used bases.
-template <typename IntType>
-struct LookupTables {
-  ABSL_CONST_INIT static const IntType kVmaxOverBase[];
-  ABSL_CONST_INIT static const IntType kVminOverBase[];
-};
-
-// An array initializer macro for X/base where base in [0, 36].
-// However, note that lookups for base in [0, 1] should never happen because
-// base has been validated to be in [2, 36] by safe_parse_sign_and_base().
-#define X_OVER_BASE_INITIALIZER(X)                                        \
-  {                                                                       \
-    0, 0, X / 2, X / 3, X / 4, X / 5, X / 6, X / 7, X / 8, X / 9, X / 10, \
-        X / 11, X / 12, X / 13, X / 14, X / 15, X / 16, X / 17, X / 18,   \
-        X / 19, X / 20, X / 21, X / 22, X / 23, X / 24, X / 25, X / 26,   \
-        X / 27, X / 28, X / 29, X / 30, X / 31, X / 32, X / 33, X / 34,   \
-        X / 35, X / 36,                                                   \
-  }
-
-// This kVmaxOverBase is generated with
-//  for (int base = 2; base < 37; ++base) {
-//    absl::uint128 max = std::numeric_limits<absl::uint128>::max();
-//    auto result = max / base;
-//    std::cout << "    MakeUint128(" << absl::Uint128High64(result) << "u, "
-//              << absl::Uint128Low64(result) << "u),\n";
-//  }
-// See https://godbolt.org/z/aneYsb
-//
-// uint128& operator/=(uint128) is not constexpr, so hardcode the resulting
-// array to avoid a static initializer.
-template<>
-const uint128 LookupTables<uint128>::kVmaxOverBase[] = {
-    0,
-    0,
-    MakeUint128(9223372036854775807u, 18446744073709551615u),
-    MakeUint128(6148914691236517205u, 6148914691236517205u),
-    MakeUint128(4611686018427387903u, 18446744073709551615u),
-    MakeUint128(3689348814741910323u, 3689348814741910323u),
-    MakeUint128(3074457345618258602u, 12297829382473034410u),
-    MakeUint128(2635249153387078802u, 5270498306774157604u),
-    MakeUint128(2305843009213693951u, 18446744073709551615u),
-    MakeUint128(2049638230412172401u, 14347467612885206812u),
-    MakeUint128(1844674407370955161u, 11068046444225730969u),
-    MakeUint128(1676976733973595601u, 8384883669867978007u),
-    MakeUint128(1537228672809129301u, 6148914691236517205u),
-    MakeUint128(1418980313362273201u, 4256940940086819603u),
-    MakeUint128(1317624576693539401u, 2635249153387078802u),
-    MakeUint128(1229782938247303441u, 1229782938247303441u),
-    MakeUint128(1152921504606846975u, 18446744073709551615u),
-    MakeUint128(1085102592571150095u, 1085102592571150095u),
-    MakeUint128(1024819115206086200u, 16397105843297379214u),
-    MakeUint128(970881267037344821u, 16504981539634861972u),
-    MakeUint128(922337203685477580u, 14757395258967641292u),
-    MakeUint128(878416384462359600u, 14054662151397753612u),
-    MakeUint128(838488366986797800u, 13415813871788764811u),
-    MakeUint128(802032351030850070u, 4812194106185100421u),
-    MakeUint128(768614336404564650u, 12297829382473034410u),
-    MakeUint128(737869762948382064u, 11805916207174113034u),
-    MakeUint128(709490156681136600u, 11351842506898185609u),
-    MakeUint128(683212743470724133u, 17080318586768103348u),
-    MakeUint128(658812288346769700u, 10540996613548315209u),
-    MakeUint128(636094623231363848u, 15266270957552732371u),
-    MakeUint128(614891469123651720u, 9838263505978427528u),
-    MakeUint128(595056260442243600u, 9520900167075897608u),
-    MakeUint128(576460752303423487u, 18446744073709551615u),
-    MakeUint128(558992244657865200u, 8943875914525843207u),
-    MakeUint128(542551296285575047u, 9765923333140350855u),
-    MakeUint128(527049830677415760u, 8432797290838652167u),
-    MakeUint128(512409557603043100u, 8198552921648689607u),
-};
-
-// This kVmaxOverBase generated with
-//   for (int base = 2; base < 37; ++base) {
-//    absl::int128 max = std::numeric_limits<absl::int128>::max();
-//    auto result = max / base;
-//    std::cout << "\tMakeInt128(" << absl::Int128High64(result) << ", "
-//              << absl::Int128Low64(result) << "u),\n";
-//  }
-// See https://godbolt.org/z/7djYWz
-//
-// int128& operator/=(int128) is not constexpr, so hardcode the resulting array
-// to avoid a static initializer.
-template<>
-const int128 LookupTables<int128>::kVmaxOverBase[] = {
-    0,
-    0,
-    MakeInt128(4611686018427387903, 18446744073709551615u),
-    MakeInt128(3074457345618258602, 12297829382473034410u),
-    MakeInt128(2305843009213693951, 18446744073709551615u),
-    MakeInt128(1844674407370955161, 11068046444225730969u),
-    MakeInt128(1537228672809129301, 6148914691236517205u),
-    MakeInt128(1317624576693539401, 2635249153387078802u),
-    MakeInt128(1152921504606846975, 18446744073709551615u),
-    MakeInt128(1024819115206086200, 16397105843297379214u),
-    MakeInt128(922337203685477580, 14757395258967641292u),
-    MakeInt128(838488366986797800, 13415813871788764811u),
-    MakeInt128(768614336404564650, 12297829382473034410u),
-    MakeInt128(709490156681136600, 11351842506898185609u),
-    MakeInt128(658812288346769700, 10540996613548315209u),
-    MakeInt128(614891469123651720, 9838263505978427528u),
-    MakeInt128(576460752303423487, 18446744073709551615u),
-    MakeInt128(542551296285575047, 9765923333140350855u),
-    MakeInt128(512409557603043100, 8198552921648689607u),
-    MakeInt128(485440633518672410, 17475862806672206794u),
-    MakeInt128(461168601842738790, 7378697629483820646u),
-    MakeInt128(439208192231179800, 7027331075698876806u),
-    MakeInt128(419244183493398900, 6707906935894382405u),
-    MakeInt128(401016175515425035, 2406097053092550210u),
-    MakeInt128(384307168202282325, 6148914691236517205u),
-    MakeInt128(368934881474191032, 5902958103587056517u),
-    MakeInt128(354745078340568300, 5675921253449092804u),
-    MakeInt128(341606371735362066, 17763531330238827482u),
-    MakeInt128(329406144173384850, 5270498306774157604u),
-    MakeInt128(318047311615681924, 7633135478776366185u),
-    MakeInt128(307445734561825860, 4919131752989213764u),
-    MakeInt128(297528130221121800, 4760450083537948804u),
-    MakeInt128(288230376151711743, 18446744073709551615u),
-    MakeInt128(279496122328932600, 4471937957262921603u),
-    MakeInt128(271275648142787523, 14106333703424951235u),
-    MakeInt128(263524915338707880, 4216398645419326083u),
-    MakeInt128(256204778801521550, 4099276460824344803u),
-};
-
-// This kVminOverBase generated with
-//  for (int base = 2; base < 37; ++base) {
-//    absl::int128 min = std::numeric_limits<absl::int128>::min();
-//    auto result = min / base;
-//    std::cout << "\tMakeInt128(" << absl::Int128High64(result) << ", "
-//              << absl::Int128Low64(result) << "u),\n";
-//  }
-//
-// See https://godbolt.org/z/7djYWz
-//
-// int128& operator/=(int128) is not constexpr, so hardcode the resulting array
-// to avoid a static initializer.
-template<>
-const int128 LookupTables<int128>::kVminOverBase[] = {
-    0,
-    0,
-    MakeInt128(-4611686018427387904, 0u),
-    MakeInt128(-3074457345618258603, 6148914691236517206u),
-    MakeInt128(-2305843009213693952, 0u),
-    MakeInt128(-1844674407370955162, 7378697629483820647u),
-    MakeInt128(-1537228672809129302, 12297829382473034411u),
-    MakeInt128(-1317624576693539402, 15811494920322472814u),
-    MakeInt128(-1152921504606846976, 0u),
-    MakeInt128(-1024819115206086201, 2049638230412172402u),
-    MakeInt128(-922337203685477581, 3689348814741910324u),
-    MakeInt128(-838488366986797801, 5030930201920786805u),
-    MakeInt128(-768614336404564651, 6148914691236517206u),
-    MakeInt128(-709490156681136601, 7094901566811366007u),
-    MakeInt128(-658812288346769701, 7905747460161236407u),
-    MakeInt128(-614891469123651721, 8608480567731124088u),
-    MakeInt128(-576460752303423488, 0u),
-    MakeInt128(-542551296285575048, 8680820740569200761u),
-    MakeInt128(-512409557603043101, 10248191152060862009u),
-    MakeInt128(-485440633518672411, 970881267037344822u),
-    MakeInt128(-461168601842738791, 11068046444225730970u),
-    MakeInt128(-439208192231179801, 11419412998010674810u),
-    MakeInt128(-419244183493398901, 11738837137815169211u),
-    MakeInt128(-401016175515425036, 16040647020617001406u),
-    MakeInt128(-384307168202282326, 12297829382473034411u),
-    MakeInt128(-368934881474191033, 12543785970122495099u),
-    MakeInt128(-354745078340568301, 12770822820260458812u),
-    MakeInt128(-341606371735362067, 683212743470724134u),
-    MakeInt128(-329406144173384851, 13176245766935394012u),
-    MakeInt128(-318047311615681925, 10813608594933185431u),
-    MakeInt128(-307445734561825861, 13527612320720337852u),
-    MakeInt128(-297528130221121801, 13686293990171602812u),
-    MakeInt128(-288230376151711744, 0u),
-    MakeInt128(-279496122328932601, 13974806116446630013u),
-    MakeInt128(-271275648142787524, 4340410370284600381u),
-    MakeInt128(-263524915338707881, 14230345428290225533u),
-    MakeInt128(-256204778801521551, 14347467612885206813u),
-};
-
-template <typename IntType>
-const IntType LookupTables<IntType>::kVmaxOverBase[] =
-    X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::max());
-
-template <typename IntType>
-const IntType LookupTables<IntType>::kVminOverBase[] =
-    X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::min());
-
-#undef X_OVER_BASE_INITIALIZER
-
-template <typename IntType>
-inline bool safe_parse_positive_int(absl::string_view text, int base,
-                                    IntType* value_p) {
-  IntType value = 0;
-  const IntType vmax = std::numeric_limits<IntType>::max();
-  assert(vmax > 0);
-  assert(base >= 0);
-  assert(vmax >= static_cast<IntType>(base));
-  const IntType vmax_over_base = LookupTables<IntType>::kVmaxOverBase[base];
-  assert(base < 2 ||
-         std::numeric_limits<IntType>::max() / base == vmax_over_base);
-  const char* start = text.data();
-  const char* end = start + text.size();
-  // loop over digits
-  for (; start < end; ++start) {
-    unsigned char c = static_cast<unsigned char>(start[0]);
-    int digit = kAsciiToInt[c];
-    if (digit >= base) {
-      *value_p = value;
-      return false;
-    }
-    if (value > vmax_over_base) {
-      *value_p = vmax;
-      return false;
-    }
-    value *= base;
-    if (value > vmax - digit) {
-      *value_p = vmax;
-      return false;
-    }
-    value += digit;
-  }
-  *value_p = value;
-  return true;
-}
-
-template <typename IntType>
-inline bool safe_parse_negative_int(absl::string_view text, int base,
-                                    IntType* value_p) {
-  IntType value = 0;
-  const IntType vmin = std::numeric_limits<IntType>::min();
-  assert(vmin < 0);
-  assert(vmin <= 0 - base);
-  IntType vmin_over_base = LookupTables<IntType>::kVminOverBase[base];
-  assert(base < 2 ||
-         std::numeric_limits<IntType>::min() / base == vmin_over_base);
-  // 2003 c++ standard [expr.mul]
-  // "... the sign of the remainder is implementation-defined."
-  // Although (vmin/base)*base + vmin%base is always vmin.
-  // 2011 c++ standard tightens the spec but we cannot rely on it.
-  // TODO(junyer): Handle this in the lookup table generation.
-  if (vmin % base > 0) {
-    vmin_over_base += 1;
-  }
-  const char* start = text.data();
-  const char* end = start + text.size();
-  // loop over digits
-  for (; start < end; ++start) {
-    unsigned char c = static_cast<unsigned char>(start[0]);
-    int digit = kAsciiToInt[c];
-    if (digit >= base) {
-      *value_p = value;
-      return false;
-    }
-    if (value < vmin_over_base) {
-      *value_p = vmin;
-      return false;
-    }
-    value *= base;
-    if (value < vmin + digit) {
-      *value_p = vmin;
-      return false;
-    }
-    value -= digit;
-  }
-  *value_p = value;
-  return true;
-}
-
-// Input format based on POSIX.1-2008 strtol
-// http://pubs.opengroup.org/onlinepubs/9699919799/functions/strtol.html
-template <typename IntType>
-inline bool safe_int_internal(absl::string_view text, IntType* value_p,
-                              int base) {
-  *value_p = 0;
-  bool negative;
-  if (!safe_parse_sign_and_base(&text, &base, &negative)) {
-    return false;
-  }
-  if (!negative) {
-    return safe_parse_positive_int(text, base, value_p);
-  } else {
-    return safe_parse_negative_int(text, base, value_p);
-  }
-}
-
-template <typename IntType>
-inline bool safe_uint_internal(absl::string_view text, IntType* value_p,
-                               int base) {
-  *value_p = 0;
-  bool negative;
-  if (!safe_parse_sign_and_base(&text, &base, &negative) || negative) {
-    return false;
-  }
-  return safe_parse_positive_int(text, base, value_p);
-}
-}  // anonymous namespace
-
-namespace numbers_internal {
-
-// Digit conversion.
-ABSL_CONST_INIT ABSL_DLL const char kHexChar[] =
-    "0123456789abcdef";
-
-ABSL_CONST_INIT ABSL_DLL const char kHexTable[513] =
-    "000102030405060708090a0b0c0d0e0f"
-    "101112131415161718191a1b1c1d1e1f"
-    "202122232425262728292a2b2c2d2e2f"
-    "303132333435363738393a3b3c3d3e3f"
-    "404142434445464748494a4b4c4d4e4f"
-    "505152535455565758595a5b5c5d5e5f"
-    "606162636465666768696a6b6c6d6e6f"
-    "707172737475767778797a7b7c7d7e7f"
-    "808182838485868788898a8b8c8d8e8f"
-    "909192939495969798999a9b9c9d9e9f"
-    "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
-    "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
-    "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
-    "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
-    "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
-    "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
-
-ABSL_CONST_INIT ABSL_DLL const char two_ASCII_digits[100][2] = {
-    {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, {'0', '5'},
-    {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, {'1', '0'}, {'1', '1'},
-    {'1', '2'}, {'1', '3'}, {'1', '4'}, {'1', '5'}, {'1', '6'}, {'1', '7'},
-    {'1', '8'}, {'1', '9'}, {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'},
-    {'2', '4'}, {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'},
-    {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'}, {'3', '5'},
-    {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'}, {'4', '0'}, {'4', '1'},
-    {'4', '2'}, {'4', '3'}, {'4', '4'}, {'4', '5'}, {'4', '6'}, {'4', '7'},
-    {'4', '8'}, {'4', '9'}, {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'},
-    {'5', '4'}, {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'},
-    {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'}, {'6', '5'},
-    {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'}, {'7', '0'}, {'7', '1'},
-    {'7', '2'}, {'7', '3'}, {'7', '4'}, {'7', '5'}, {'7', '6'}, {'7', '7'},
-    {'7', '8'}, {'7', '9'}, {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'},
-    {'8', '4'}, {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'},
-    {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'}, {'9', '5'},
-    {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'}};
-
-bool safe_strto32_base(absl::string_view text, int32_t* value, int base) {
-  return safe_int_internal<int32_t>(text, value, base);
-}
-
-bool safe_strto64_base(absl::string_view text, int64_t* value, int base) {
-  return safe_int_internal<int64_t>(text, value, base);
-}
-
-bool safe_strto128_base(absl::string_view text, int128* value, int base) {
-  return safe_int_internal<absl::int128>(text, value, base);
-}
-
-bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base) {
-  return safe_uint_internal<uint32_t>(text, value, base);
-}
-
-bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base) {
-  return safe_uint_internal<uint64_t>(text, value, base);
-}
-
-bool safe_strtou128_base(absl::string_view text, uint128* value, int base) {
-  return safe_uint_internal<absl::uint128>(text, value, base);
-}
-
-}  // namespace numbers_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/numbers.h b/third_party/abseil/absl/strings/numbers.h
deleted file mode 100644
index ffc738f..0000000
--- a/third_party/abseil/absl/strings/numbers.h
+++ /dev/null
@@ -1,265 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: numbers.h
-// -----------------------------------------------------------------------------
-//
-// This package contains functions for converting strings to numbers. For
-// converting numbers to strings, use `StrCat()` or `StrAppend()` in str_cat.h,
-// which automatically detect and convert most number values appropriately.
-
-#ifndef ABSL_STRINGS_NUMBERS_H_
-#define ABSL_STRINGS_NUMBERS_H_
-
-#ifdef __SSE4_2__
-#include <x86intrin.h>
-#endif
-
-#include <cstddef>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <limits>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/config.h"
-#ifdef __SSE4_2__
-// TODO(jorg): Remove this when we figure out the right way
-// to swap bytes on SSE 4.2 that works with the compilers
-// we claim to support.  Also, add tests for the compiler
-// that doesn't support the Intel _bswap64 intrinsic but
-// does support all the SSE 4.2 intrinsics
-#include "absl/base/internal/endian.h"
-#endif
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/numeric/bits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// SimpleAtoi()
-//
-// Converts the given string (optionally followed or preceded by ASCII
-// whitespace) into an integer value, returning `true` if successful. The string
-// must reflect a base-10 integer whose value falls within the range of the
-// integer type (optionally preceded by a `+` or `-`). If any errors are
-// encountered, this function returns `false`, leaving `out` in an unspecified
-// state.
-template <typename int_type>
-ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view str, int_type* out);
-
-// SimpleAtof()
-//
-// Converts the given string (optionally followed or preceded by ASCII
-// whitespace) into a float, which may be rounded on overflow or underflow,
-// returning `true` if successful.
-// See https://en.cppreference.com/w/c/string/byte/strtof for details about the
-// allowed formats for `str`, except SimpleAtof() is locale-independent and will
-// always use the "C" locale. If any errors are encountered, this function
-// returns `false`, leaving `out` in an unspecified state.
-ABSL_MUST_USE_RESULT bool SimpleAtof(absl::string_view str, float* out);
-
-// SimpleAtod()
-//
-// Converts the given string (optionally followed or preceded by ASCII
-// whitespace) into a double, which may be rounded on overflow or underflow,
-// returning `true` if successful.
-// See https://en.cppreference.com/w/c/string/byte/strtof for details about the
-// allowed formats for `str`, except SimpleAtod is locale-independent and will
-// always use the "C" locale. If any errors are encountered, this function
-// returns `false`, leaving `out` in an unspecified state.
-ABSL_MUST_USE_RESULT bool SimpleAtod(absl::string_view str, double* out);
-
-// SimpleAtob()
-//
-// Converts the given string into a boolean, returning `true` if successful.
-// The following case-insensitive strings are interpreted as boolean `true`:
-// "true", "t", "yes", "y", "1". The following case-insensitive strings
-// are interpreted as boolean `false`: "false", "f", "no", "n", "0". If any
-// errors are encountered, this function returns `false`, leaving `out` in an
-// unspecified state.
-ABSL_MUST_USE_RESULT bool SimpleAtob(absl::string_view str, bool* out);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// End of public API.  Implementation details follow.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace numbers_internal {
-
-// Digit conversion.
-ABSL_DLL extern const char kHexChar[17];  // 0123456789abcdef
-ABSL_DLL extern const char
-    kHexTable[513];  // 000102030405060708090a0b0c0d0e0f1011...
-ABSL_DLL extern const char
-    two_ASCII_digits[100][2];  // 00, 01, 02, 03...
-
-// Writes a two-character representation of 'i' to 'buf'. 'i' must be in the
-// range 0 <= i < 100, and buf must have space for two characters. Example:
-//   char buf[2];
-//   PutTwoDigits(42, buf);
-//   // buf[0] == '4'
-//   // buf[1] == '2'
-inline void PutTwoDigits(size_t i, char* buf) {
-  assert(i < 100);
-  memcpy(buf, two_ASCII_digits[i], 2);
-}
-
-// safe_strto?() functions for implementing SimpleAtoi()
-bool safe_strto32_base(absl::string_view text, int32_t* value, int base);
-bool safe_strto64_base(absl::string_view text, int64_t* value, int base);
-bool safe_strto128_base(absl::string_view text, absl::int128* value,
-                         int base);
-bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base);
-bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base);
-bool safe_strtou128_base(absl::string_view text, absl::uint128* value,
-                         int base);
-
-static const int kFastToBufferSize = 32;
-static const int kSixDigitsToBufferSize = 16;
-
-// Helper function for fast formatting of floating-point values.
-// The result is the same as printf's "%g", a.k.a. "%.6g"; that is, six
-// significant digits are returned, trailing zeros are removed, and numbers
-// outside the range 0.0001-999999 are output using scientific notation
-// (1.23456e+06). This routine is heavily optimized.
-// Required buffer size is `kSixDigitsToBufferSize`.
-size_t SixDigitsToBuffer(double d, char* buffer);
-
-// These functions are intended for speed. All functions take an output buffer
-// as an argument and return a pointer to the last byte they wrote, which is the
-// terminating '\0'. At most `kFastToBufferSize` bytes are written.
-char* FastIntToBuffer(int32_t, char*);
-char* FastIntToBuffer(uint32_t, char*);
-char* FastIntToBuffer(int64_t, char*);
-char* FastIntToBuffer(uint64_t, char*);
-
-// For enums and integer types that are not an exact match for the types above,
-// use templates to call the appropriate one of the four overloads above.
-template <typename int_type>
-char* FastIntToBuffer(int_type i, char* buffer) {
-  static_assert(sizeof(i) <= 64 / 8,
-                "FastIntToBuffer works only with 64-bit-or-less integers.");
-  // TODO(jorg): This signed-ness check is used because it works correctly
-  // with enums, and it also serves to check that int_type is not a pointer.
-  // If one day something like std::is_signed<enum E> works, switch to it.
-  if (static_cast<int_type>(1) - 2 < 0) {  // Signed
-    if (sizeof(i) > 32 / 8) {           // 33-bit to 64-bit
-      return FastIntToBuffer(static_cast<int64_t>(i), buffer);
-    } else {  // 32-bit or less
-      return FastIntToBuffer(static_cast<int32_t>(i), buffer);
-    }
-  } else {                     // Unsigned
-    if (sizeof(i) > 32 / 8) {  // 33-bit to 64-bit
-      return FastIntToBuffer(static_cast<uint64_t>(i), buffer);
-    } else {  // 32-bit or less
-      return FastIntToBuffer(static_cast<uint32_t>(i), buffer);
-    }
-  }
-}
-
-// Implementation of SimpleAtoi, generalized to support arbitrary base (used
-// with base different from 10 elsewhere in Abseil implementation).
-template <typename int_type>
-ABSL_MUST_USE_RESULT bool safe_strtoi_base(absl::string_view s, int_type* out,
-                                           int base) {
-  static_assert(sizeof(*out) == 4 || sizeof(*out) == 8,
-                "SimpleAtoi works only with 32-bit or 64-bit integers.");
-  static_assert(!std::is_floating_point<int_type>::value,
-                "Use SimpleAtof or SimpleAtod instead.");
-  bool parsed;
-  // TODO(jorg): This signed-ness check is used because it works correctly
-  // with enums, and it also serves to check that int_type is not a pointer.
-  // If one day something like std::is_signed<enum E> works, switch to it.
-  if (static_cast<int_type>(1) - 2 < 0) {  // Signed
-    if (sizeof(*out) == 64 / 8) {       // 64-bit
-      int64_t val;
-      parsed = numbers_internal::safe_strto64_base(s, &val, base);
-      *out = static_cast<int_type>(val);
-    } else {  // 32-bit
-      int32_t val;
-      parsed = numbers_internal::safe_strto32_base(s, &val, base);
-      *out = static_cast<int_type>(val);
-    }
-  } else {                         // Unsigned
-    if (sizeof(*out) == 64 / 8) {  // 64-bit
-      uint64_t val;
-      parsed = numbers_internal::safe_strtou64_base(s, &val, base);
-      *out = static_cast<int_type>(val);
-    } else {  // 32-bit
-      uint32_t val;
-      parsed = numbers_internal::safe_strtou32_base(s, &val, base);
-      *out = static_cast<int_type>(val);
-    }
-  }
-  return parsed;
-}
-
-// FastHexToBufferZeroPad16()
-//
-// Outputs `val` into `out` as if by `snprintf(out, 17, "%016x", val)` but
-// without the terminating null character. Thus `out` must be of length >= 16.
-// Returns the number of non-pad digits of the output (it can never be zero
-// since 0 has one digit).
-inline size_t FastHexToBufferZeroPad16(uint64_t val, char* out) {
-#ifdef __SSE4_2__
-  uint64_t be = absl::big_endian::FromHost64(val);
-  const auto kNibbleMask = _mm_set1_epi8(0xf);
-  const auto kHexDigits = _mm_setr_epi8('0', '1', '2', '3', '4', '5', '6', '7',
-                                        '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
-  auto v = _mm_loadl_epi64(reinterpret_cast<__m128i*>(&be));  // load lo dword
-  auto v4 = _mm_srli_epi64(v, 4);                            // shift 4 right
-  auto il = _mm_unpacklo_epi8(v4, v);                        // interleave bytes
-  auto m = _mm_and_si128(il, kNibbleMask);                   // mask out nibbles
-  auto hexchars = _mm_shuffle_epi8(kHexDigits, m);           // hex chars
-  _mm_storeu_si128(reinterpret_cast<__m128i*>(out), hexchars);
-#else
-  for (int i = 0; i < 8; ++i) {
-    auto byte = (val >> (56 - 8 * i)) & 0xFF;
-    auto* hex = &absl::numbers_internal::kHexTable[byte * 2];
-    std::memcpy(out + 2 * i, hex, 2);
-  }
-#endif
-  // | 0x1 so that even 0 has 1 digit.
-  return 16 - countl_zero(val | 0x1) / 4;
-}
-
-}  // namespace numbers_internal
-
-template <typename int_type>
-ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view str, int_type* out) {
-  return numbers_internal::safe_strtoi_base(str, out, 10);
-}
-
-ABSL_MUST_USE_RESULT inline bool SimpleAtoi(absl::string_view str,
-                                            absl::int128* out) {
-  return numbers_internal::safe_strto128_base(str, out, 10);
-}
-
-ABSL_MUST_USE_RESULT inline bool SimpleAtoi(absl::string_view str,
-                                            absl::uint128* out) {
-  return numbers_internal::safe_strtou128_base(str, out, 10);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_NUMBERS_H_
diff --git a/third_party/abseil/absl/strings/numbers_benchmark.cc b/third_party/abseil/absl/strings/numbers_benchmark.cc
deleted file mode 100644
index 6e79b3e..0000000
--- a/third_party/abseil/absl/strings/numbers_benchmark.cc
+++ /dev/null
@@ -1,286 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdint>
-#include <random>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/distributions.h"
-#include "absl/random/random.h"
-#include "absl/strings/numbers.h"
-
-namespace {
-
-template <typename T>
-void BM_FastIntToBuffer(benchmark::State& state) {
-  const int inc = state.range(0);
-  char buf[absl::numbers_internal::kFastToBufferSize];
-  // Use the unsigned type to increment to take advantage of well-defined
-  // modular arithmetic.
-  typename std::make_unsigned<T>::type x = 0;
-  for (auto _ : state) {
-    absl::numbers_internal::FastIntToBuffer(static_cast<T>(x), buf);
-    x += inc;
-  }
-}
-BENCHMARK_TEMPLATE(BM_FastIntToBuffer, int32_t)->Range(0, 1 << 15);
-BENCHMARK_TEMPLATE(BM_FastIntToBuffer, int64_t)->Range(0, 1 << 30);
-
-// Creates an integer that would be printed as `num_digits` repeated 7s in the
-// given `base`. `base` must be greater than or equal to 8.
-int64_t RepeatedSevens(int num_digits, int base) {
-  ABSL_RAW_CHECK(base >= 8, "");
-  int64_t num = 7;
-  while (--num_digits) num = base * num + 7;
-  return num;
-}
-
-void BM_safe_strto32_string(benchmark::State& state) {
-  const int digits = state.range(0);
-  const int base = state.range(1);
-  std::string str(digits, '7');  // valid in octal, decimal and hex
-  int32_t value = 0;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::numbers_internal::safe_strto32_base(str, &value, base));
-  }
-  ABSL_RAW_CHECK(value == RepeatedSevens(digits, base), "");
-}
-BENCHMARK(BM_safe_strto32_string)
-    ->ArgPair(1, 8)
-    ->ArgPair(1, 10)
-    ->ArgPair(1, 16)
-    ->ArgPair(2, 8)
-    ->ArgPair(2, 10)
-    ->ArgPair(2, 16)
-    ->ArgPair(4, 8)
-    ->ArgPair(4, 10)
-    ->ArgPair(4, 16)
-    ->ArgPair(8, 8)
-    ->ArgPair(8, 10)
-    ->ArgPair(8, 16)
-    ->ArgPair(10, 8)
-    ->ArgPair(9, 10);
-
-void BM_safe_strto64_string(benchmark::State& state) {
-  const int digits = state.range(0);
-  const int base = state.range(1);
-  std::string str(digits, '7');  // valid in octal, decimal and hex
-  int64_t value = 0;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::numbers_internal::safe_strto64_base(str, &value, base));
-  }
-  ABSL_RAW_CHECK(value == RepeatedSevens(digits, base), "");
-}
-BENCHMARK(BM_safe_strto64_string)
-    ->ArgPair(1, 8)
-    ->ArgPair(1, 10)
-    ->ArgPair(1, 16)
-    ->ArgPair(2, 8)
-    ->ArgPair(2, 10)
-    ->ArgPair(2, 16)
-    ->ArgPair(4, 8)
-    ->ArgPair(4, 10)
-    ->ArgPair(4, 16)
-    ->ArgPair(8, 8)
-    ->ArgPair(8, 10)
-    ->ArgPair(8, 16)
-    ->ArgPair(16, 8)
-    ->ArgPair(16, 10)
-    ->ArgPair(16, 16);
-
-void BM_safe_strtou32_string(benchmark::State& state) {
-  const int digits = state.range(0);
-  const int base = state.range(1);
-  std::string str(digits, '7');  // valid in octal, decimal and hex
-  uint32_t value = 0;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::numbers_internal::safe_strtou32_base(str, &value, base));
-  }
-  ABSL_RAW_CHECK(value == RepeatedSevens(digits, base), "");
-}
-BENCHMARK(BM_safe_strtou32_string)
-    ->ArgPair(1, 8)
-    ->ArgPair(1, 10)
-    ->ArgPair(1, 16)
-    ->ArgPair(2, 8)
-    ->ArgPair(2, 10)
-    ->ArgPair(2, 16)
-    ->ArgPair(4, 8)
-    ->ArgPair(4, 10)
-    ->ArgPair(4, 16)
-    ->ArgPair(8, 8)
-    ->ArgPair(8, 10)
-    ->ArgPair(8, 16)
-    ->ArgPair(10, 8)
-    ->ArgPair(9, 10);
-
-void BM_safe_strtou64_string(benchmark::State& state) {
-  const int digits = state.range(0);
-  const int base = state.range(1);
-  std::string str(digits, '7');  // valid in octal, decimal and hex
-  uint64_t value = 0;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(
-        absl::numbers_internal::safe_strtou64_base(str, &value, base));
-  }
-  ABSL_RAW_CHECK(value == RepeatedSevens(digits, base), "");
-}
-BENCHMARK(BM_safe_strtou64_string)
-    ->ArgPair(1, 8)
-    ->ArgPair(1, 10)
-    ->ArgPair(1, 16)
-    ->ArgPair(2, 8)
-    ->ArgPair(2, 10)
-    ->ArgPair(2, 16)
-    ->ArgPair(4, 8)
-    ->ArgPair(4, 10)
-    ->ArgPair(4, 16)
-    ->ArgPair(8, 8)
-    ->ArgPair(8, 10)
-    ->ArgPair(8, 16)
-    ->ArgPair(16, 8)
-    ->ArgPair(16, 10)
-    ->ArgPair(16, 16);
-
-// Returns a vector of `num_strings` strings. Each string represents a
-// floating point number with `num_digits` digits before the decimal point and
-// another `num_digits` digits after.
-std::vector<std::string> MakeFloatStrings(int num_strings, int num_digits) {
-  // For convenience, use a random number generator to generate the test data.
-  // We don't actually need random properties, so use a fixed seed.
-  std::minstd_rand0 rng(1);
-  std::uniform_int_distribution<int> random_digit('0', '9');
-
-  std::vector<std::string> float_strings(num_strings);
-  for (std::string& s : float_strings) {
-    s.reserve(2 * num_digits + 1);
-    for (int i = 0; i < num_digits; ++i) {
-      s.push_back(static_cast<char>(random_digit(rng)));
-    }
-    s.push_back('.');
-    for (int i = 0; i < num_digits; ++i) {
-      s.push_back(static_cast<char>(random_digit(rng)));
-    }
-  }
-  return float_strings;
-}
-
-template <typename StringType>
-StringType GetStringAs(const std::string& s) {
-  return static_cast<StringType>(s);
-}
-template <>
-const char* GetStringAs<const char*>(const std::string& s) {
-  return s.c_str();
-}
-
-template <typename StringType>
-std::vector<StringType> GetStringsAs(const std::vector<std::string>& strings) {
-  std::vector<StringType> result;
-  result.reserve(strings.size());
-  for (const std::string& s : strings) {
-    result.push_back(GetStringAs<StringType>(s));
-  }
-  return result;
-}
-
-template <typename T>
-void BM_SimpleAtof(benchmark::State& state) {
-  const int num_strings = state.range(0);
-  const int num_digits = state.range(1);
-  std::vector<std::string> backing_strings =
-      MakeFloatStrings(num_strings, num_digits);
-  std::vector<T> inputs = GetStringsAs<T>(backing_strings);
-  float value;
-  for (auto _ : state) {
-    for (const T& input : inputs) {
-      benchmark::DoNotOptimize(absl::SimpleAtof(input, &value));
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_SimpleAtof, absl::string_view)
-    ->ArgPair(10, 1)
-    ->ArgPair(10, 2)
-    ->ArgPair(10, 4)
-    ->ArgPair(10, 8);
-BENCHMARK_TEMPLATE(BM_SimpleAtof, const char*)
-    ->ArgPair(10, 1)
-    ->ArgPair(10, 2)
-    ->ArgPair(10, 4)
-    ->ArgPair(10, 8);
-BENCHMARK_TEMPLATE(BM_SimpleAtof, std::string)
-    ->ArgPair(10, 1)
-    ->ArgPair(10, 2)
-    ->ArgPair(10, 4)
-    ->ArgPair(10, 8);
-
-template <typename T>
-void BM_SimpleAtod(benchmark::State& state) {
-  const int num_strings = state.range(0);
-  const int num_digits = state.range(1);
-  std::vector<std::string> backing_strings =
-      MakeFloatStrings(num_strings, num_digits);
-  std::vector<T> inputs = GetStringsAs<T>(backing_strings);
-  double value;
-  for (auto _ : state) {
-    for (const T& input : inputs) {
-      benchmark::DoNotOptimize(absl::SimpleAtod(input, &value));
-    }
-  }
-}
-BENCHMARK_TEMPLATE(BM_SimpleAtod, absl::string_view)
-    ->ArgPair(10, 1)
-    ->ArgPair(10, 2)
-    ->ArgPair(10, 4)
-    ->ArgPair(10, 8);
-BENCHMARK_TEMPLATE(BM_SimpleAtod, const char*)
-    ->ArgPair(10, 1)
-    ->ArgPair(10, 2)
-    ->ArgPair(10, 4)
-    ->ArgPair(10, 8);
-BENCHMARK_TEMPLATE(BM_SimpleAtod, std::string)
-    ->ArgPair(10, 1)
-    ->ArgPair(10, 2)
-    ->ArgPair(10, 4)
-    ->ArgPair(10, 8);
-
-void BM_FastHexToBufferZeroPad16(benchmark::State& state) {
-  absl::BitGen rng;
-  std::vector<uint64_t> nums;
-  nums.resize(1000);
-  auto min = std::numeric_limits<uint64_t>::min();
-  auto max = std::numeric_limits<uint64_t>::max();
-  for (auto& num : nums) {
-    num = absl::LogUniform(rng, min, max);
-  }
-
-  char buf[16];
-  while (state.KeepRunningBatch(nums.size())) {
-    for (auto num : nums) {
-      auto digits = absl::numbers_internal::FastHexToBufferZeroPad16(num, buf);
-      benchmark::DoNotOptimize(digits);
-      benchmark::DoNotOptimize(buf);
-    }
-  }
-}
-BENCHMARK(BM_FastHexToBufferZeroPad16);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/numbers_test.cc b/third_party/abseil/absl/strings/numbers_test.cc
deleted file mode 100644
index 27616bf..0000000
--- a/third_party/abseil/absl/strings/numbers_test.cc
+++ /dev/null
@@ -1,1356 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file tests string processing functions related to numeric values.
-
-#include "absl/strings/numbers.h"
-
-#include <sys/types.h>
-
-#include <cfenv>  // NOLINT(build/c++11)
-#include <cinttypes>
-#include <climits>
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <limits>
-#include <numeric>
-#include <random>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/random/distributions.h"
-#include "absl/random/random.h"
-#include "absl/strings/internal/numbers_test_common.h"
-#include "absl/strings/internal/ostringstream.h"
-#include "absl/strings/internal/pow10_helper.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-using absl::SimpleAtoi;
-using absl::numbers_internal::kSixDigitsToBufferSize;
-using absl::numbers_internal::safe_strto32_base;
-using absl::numbers_internal::safe_strto64_base;
-using absl::numbers_internal::safe_strtou32_base;
-using absl::numbers_internal::safe_strtou64_base;
-using absl::numbers_internal::SixDigitsToBuffer;
-using absl::strings_internal::Itoa;
-using absl::strings_internal::strtouint32_test_cases;
-using absl::strings_internal::strtouint64_test_cases;
-using testing::Eq;
-using testing::MatchesRegex;
-
-// Number of floats to test with.
-// 5,000,000 is a reasonable default for a test that only takes a few seconds.
-// 1,000,000,000+ triggers checking for all possible mantissa values for
-// double-precision tests. 2,000,000,000+ triggers checking for every possible
-// single-precision float.
-const int kFloatNumCases = 5000000;
-
-// This is a slow, brute-force routine to compute the exact base-10
-// representation of a double-precision floating-point number.  It
-// is useful for debugging only.
-std::string PerfectDtoa(double d) {
-  if (d == 0) return "0";
-  if (d < 0) return "-" + PerfectDtoa(-d);
-
-  // Basic theory: decompose d into mantissa and exp, where
-  // d = mantissa * 2^exp, and exp is as close to zero as possible.
-  int64_t mantissa, exp = 0;
-  while (d >= 1ULL << 63) ++exp, d *= 0.5;
-  while ((mantissa = d) != d) --exp, d *= 2.0;
-
-  // Then convert mantissa to ASCII, and either double it (if
-  // exp > 0) or halve it (if exp < 0) repeatedly.  "halve it"
-  // in this case means multiplying it by five and dividing by 10.
-  constexpr int maxlen = 1100;  // worst case is actually 1030 or so.
-  char buf[maxlen + 5];
-  for (int64_t num = mantissa, pos = maxlen; --pos >= 0;) {
-    buf[pos] = '0' + (num % 10);
-    num /= 10;
-  }
-  char* begin = &buf[0];
-  char* end = buf + maxlen;
-  for (int i = 0; i != exp; i += (exp > 0) ? 1 : -1) {
-    int carry = 0;
-    for (char* p = end; --p != begin;) {
-      int dig = *p - '0';
-      dig = dig * (exp > 0 ? 2 : 5) + carry;
-      carry = dig / 10;
-      dig %= 10;
-      *p = '0' + dig;
-    }
-  }
-  if (exp < 0) {
-    // "dividing by 10" above means we have to add the decimal point.
-    memmove(end + 1 + exp, end + exp, 1 - exp);
-    end[exp] = '.';
-    ++end;
-  }
-  while (*begin == '0' && begin[1] != '.') ++begin;
-  return {begin, end};
-}
-
-TEST(ToString, PerfectDtoa) {
-  EXPECT_THAT(PerfectDtoa(1), Eq("1"));
-  EXPECT_THAT(PerfectDtoa(0.1),
-              Eq("0.1000000000000000055511151231257827021181583404541015625"));
-  EXPECT_THAT(PerfectDtoa(1e24), Eq("999999999999999983222784"));
-  EXPECT_THAT(PerfectDtoa(5e-324), MatchesRegex("0.0000.*625"));
-  for (int i = 0; i < 100; ++i) {
-    for (double multiplier :
-         {1e-300, 1e-200, 1e-100, 0.1, 1.0, 10.0, 1e100, 1e300}) {
-      double d = multiplier * i;
-      std::string s = PerfectDtoa(d);
-      EXPECT_DOUBLE_EQ(d, strtod(s.c_str(), nullptr));
-    }
-  }
-}
-
-template <typename integer>
-struct MyInteger {
-  integer i;
-  explicit constexpr MyInteger(integer i) : i(i) {}
-  constexpr operator integer() const { return i; }
-
-  constexpr MyInteger operator+(MyInteger other) const { return i + other.i; }
-  constexpr MyInteger operator-(MyInteger other) const { return i - other.i; }
-  constexpr MyInteger operator*(MyInteger other) const { return i * other.i; }
-  constexpr MyInteger operator/(MyInteger other) const { return i / other.i; }
-
-  constexpr bool operator<(MyInteger other) const { return i < other.i; }
-  constexpr bool operator<=(MyInteger other) const { return i <= other.i; }
-  constexpr bool operator==(MyInteger other) const { return i == other.i; }
-  constexpr bool operator>=(MyInteger other) const { return i >= other.i; }
-  constexpr bool operator>(MyInteger other) const { return i > other.i; }
-  constexpr bool operator!=(MyInteger other) const { return i != other.i; }
-
-  integer as_integer() const { return i; }
-};
-
-typedef MyInteger<int64_t> MyInt64;
-typedef MyInteger<uint64_t> MyUInt64;
-
-void CheckInt32(int32_t x) {
-  char buffer[absl::numbers_internal::kFastToBufferSize];
-  char* actual = absl::numbers_internal::FastIntToBuffer(x, buffer);
-  std::string expected = std::to_string(x);
-  EXPECT_EQ(expected, std::string(buffer, actual)) << " Input " << x;
-
-  char* generic_actual = absl::numbers_internal::FastIntToBuffer(x, buffer);
-  EXPECT_EQ(expected, std::string(buffer, generic_actual)) << " Input " << x;
-}
-
-void CheckInt64(int64_t x) {
-  char buffer[absl::numbers_internal::kFastToBufferSize + 3];
-  buffer[0] = '*';
-  buffer[23] = '*';
-  buffer[24] = '*';
-  char* actual = absl::numbers_internal::FastIntToBuffer(x, &buffer[1]);
-  std::string expected = std::to_string(x);
-  EXPECT_EQ(expected, std::string(&buffer[1], actual)) << " Input " << x;
-  EXPECT_EQ(buffer[0], '*');
-  EXPECT_EQ(buffer[23], '*');
-  EXPECT_EQ(buffer[24], '*');
-
-  char* my_actual =
-      absl::numbers_internal::FastIntToBuffer(MyInt64(x), &buffer[1]);
-  EXPECT_EQ(expected, std::string(&buffer[1], my_actual)) << " Input " << x;
-}
-
-void CheckUInt32(uint32_t x) {
-  char buffer[absl::numbers_internal::kFastToBufferSize];
-  char* actual = absl::numbers_internal::FastIntToBuffer(x, buffer);
-  std::string expected = std::to_string(x);
-  EXPECT_EQ(expected, std::string(buffer, actual)) << " Input " << x;
-
-  char* generic_actual = absl::numbers_internal::FastIntToBuffer(x, buffer);
-  EXPECT_EQ(expected, std::string(buffer, generic_actual)) << " Input " << x;
-}
-
-void CheckUInt64(uint64_t x) {
-  char buffer[absl::numbers_internal::kFastToBufferSize + 1];
-  char* actual = absl::numbers_internal::FastIntToBuffer(x, &buffer[1]);
-  std::string expected = std::to_string(x);
-  EXPECT_EQ(expected, std::string(&buffer[1], actual)) << " Input " << x;
-
-  char* generic_actual = absl::numbers_internal::FastIntToBuffer(x, &buffer[1]);
-  EXPECT_EQ(expected, std::string(&buffer[1], generic_actual))
-      << " Input " << x;
-
-  char* my_actual =
-      absl::numbers_internal::FastIntToBuffer(MyUInt64(x), &buffer[1]);
-  EXPECT_EQ(expected, std::string(&buffer[1], my_actual)) << " Input " << x;
-}
-
-void CheckHex64(uint64_t v) {
-  char expected[16 + 1];
-  std::string actual = absl::StrCat(absl::Hex(v, absl::kZeroPad16));
-  snprintf(expected, sizeof(expected), "%016" PRIx64, static_cast<uint64_t>(v));
-  EXPECT_EQ(expected, actual) << " Input " << v;
-  actual = absl::StrCat(absl::Hex(v, absl::kSpacePad16));
-  snprintf(expected, sizeof(expected), "%16" PRIx64, static_cast<uint64_t>(v));
-  EXPECT_EQ(expected, actual) << " Input " << v;
-}
-
-TEST(Numbers, TestFastPrints) {
-  for (int i = -100; i <= 100; i++) {
-    CheckInt32(i);
-    CheckInt64(i);
-  }
-  for (int i = 0; i <= 100; i++) {
-    CheckUInt32(i);
-    CheckUInt64(i);
-  }
-  // Test min int to make sure that works
-  CheckInt32(INT_MIN);
-  CheckInt32(INT_MAX);
-  CheckInt64(LONG_MIN);
-  CheckInt64(uint64_t{1000000000});
-  CheckInt64(uint64_t{9999999999});
-  CheckInt64(uint64_t{100000000000000});
-  CheckInt64(uint64_t{999999999999999});
-  CheckInt64(uint64_t{1000000000000000000});
-  CheckInt64(uint64_t{1199999999999999999});
-  CheckInt64(int64_t{-700000000000000000});
-  CheckInt64(LONG_MAX);
-  CheckUInt32(std::numeric_limits<uint32_t>::max());
-  CheckUInt64(uint64_t{1000000000});
-  CheckUInt64(uint64_t{9999999999});
-  CheckUInt64(uint64_t{100000000000000});
-  CheckUInt64(uint64_t{999999999999999});
-  CheckUInt64(uint64_t{1000000000000000000});
-  CheckUInt64(uint64_t{1199999999999999999});
-  CheckUInt64(std::numeric_limits<uint64_t>::max());
-
-  for (int i = 0; i < 10000; i++) {
-    CheckHex64(i);
-  }
-  CheckHex64(uint64_t{0x123456789abcdef0});
-}
-
-template <typename int_type, typename in_val_type>
-void VerifySimpleAtoiGood(in_val_type in_value, int_type exp_value) {
-  std::string s;
-  // (u)int128 can be streamed but not StrCat'd.
-  absl::strings_internal::OStringStream(&s) << in_value;
-  int_type x = static_cast<int_type>(~exp_value);
-  EXPECT_TRUE(SimpleAtoi(s, &x))
-      << "in_value=" << in_value << " s=" << s << " x=" << x;
-  EXPECT_EQ(exp_value, x);
-  x = static_cast<int_type>(~exp_value);
-  EXPECT_TRUE(SimpleAtoi(s.c_str(), &x));
-  EXPECT_EQ(exp_value, x);
-}
-
-template <typename int_type, typename in_val_type>
-void VerifySimpleAtoiBad(in_val_type in_value) {
-  std::string s;
-  // (u)int128 can be streamed but not StrCat'd.
-  absl::strings_internal::OStringStream(&s) << in_value;
-  int_type x;
-  EXPECT_FALSE(SimpleAtoi(s, &x));
-  EXPECT_FALSE(SimpleAtoi(s.c_str(), &x));
-}
-
-TEST(NumbersTest, Atoi) {
-  // SimpleAtoi(absl::string_view, int32_t)
-  VerifySimpleAtoiGood<int32_t>(0, 0);
-  VerifySimpleAtoiGood<int32_t>(42, 42);
-  VerifySimpleAtoiGood<int32_t>(-42, -42);
-
-  VerifySimpleAtoiGood<int32_t>(std::numeric_limits<int32_t>::min(),
-                                std::numeric_limits<int32_t>::min());
-  VerifySimpleAtoiGood<int32_t>(std::numeric_limits<int32_t>::max(),
-                                std::numeric_limits<int32_t>::max());
-
-  // SimpleAtoi(absl::string_view, uint32_t)
-  VerifySimpleAtoiGood<uint32_t>(0, 0);
-  VerifySimpleAtoiGood<uint32_t>(42, 42);
-  VerifySimpleAtoiBad<uint32_t>(-42);
-
-  VerifySimpleAtoiBad<uint32_t>(std::numeric_limits<int32_t>::min());
-  VerifySimpleAtoiGood<uint32_t>(std::numeric_limits<int32_t>::max(),
-                                 std::numeric_limits<int32_t>::max());
-  VerifySimpleAtoiGood<uint32_t>(std::numeric_limits<uint32_t>::max(),
-                                 std::numeric_limits<uint32_t>::max());
-  VerifySimpleAtoiBad<uint32_t>(std::numeric_limits<int64_t>::min());
-  VerifySimpleAtoiBad<uint32_t>(std::numeric_limits<int64_t>::max());
-  VerifySimpleAtoiBad<uint32_t>(std::numeric_limits<uint64_t>::max());
-
-  // SimpleAtoi(absl::string_view, int64_t)
-  VerifySimpleAtoiGood<int64_t>(0, 0);
-  VerifySimpleAtoiGood<int64_t>(42, 42);
-  VerifySimpleAtoiGood<int64_t>(-42, -42);
-
-  VerifySimpleAtoiGood<int64_t>(std::numeric_limits<int32_t>::min(),
-                                std::numeric_limits<int32_t>::min());
-  VerifySimpleAtoiGood<int64_t>(std::numeric_limits<int32_t>::max(),
-                                std::numeric_limits<int32_t>::max());
-  VerifySimpleAtoiGood<int64_t>(std::numeric_limits<uint32_t>::max(),
-                                std::numeric_limits<uint32_t>::max());
-  VerifySimpleAtoiGood<int64_t>(std::numeric_limits<int64_t>::min(),
-                                std::numeric_limits<int64_t>::min());
-  VerifySimpleAtoiGood<int64_t>(std::numeric_limits<int64_t>::max(),
-                                std::numeric_limits<int64_t>::max());
-  VerifySimpleAtoiBad<int64_t>(std::numeric_limits<uint64_t>::max());
-
-  // SimpleAtoi(absl::string_view, uint64_t)
-  VerifySimpleAtoiGood<uint64_t>(0, 0);
-  VerifySimpleAtoiGood<uint64_t>(42, 42);
-  VerifySimpleAtoiBad<uint64_t>(-42);
-
-  VerifySimpleAtoiBad<uint64_t>(std::numeric_limits<int32_t>::min());
-  VerifySimpleAtoiGood<uint64_t>(std::numeric_limits<int32_t>::max(),
-                                 std::numeric_limits<int32_t>::max());
-  VerifySimpleAtoiGood<uint64_t>(std::numeric_limits<uint32_t>::max(),
-                                 std::numeric_limits<uint32_t>::max());
-  VerifySimpleAtoiBad<uint64_t>(std::numeric_limits<int64_t>::min());
-  VerifySimpleAtoiGood<uint64_t>(std::numeric_limits<int64_t>::max(),
-                                 std::numeric_limits<int64_t>::max());
-  VerifySimpleAtoiGood<uint64_t>(std::numeric_limits<uint64_t>::max(),
-                                 std::numeric_limits<uint64_t>::max());
-
-  // SimpleAtoi(absl::string_view, absl::uint128)
-  VerifySimpleAtoiGood<absl::uint128>(0, 0);
-  VerifySimpleAtoiGood<absl::uint128>(42, 42);
-  VerifySimpleAtoiBad<absl::uint128>(-42);
-
-  VerifySimpleAtoiBad<absl::uint128>(std::numeric_limits<int32_t>::min());
-  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<int32_t>::max(),
-                                      std::numeric_limits<int32_t>::max());
-  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<uint32_t>::max(),
-                                      std::numeric_limits<uint32_t>::max());
-  VerifySimpleAtoiBad<absl::uint128>(std::numeric_limits<int64_t>::min());
-  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<int64_t>::max(),
-                                      std::numeric_limits<int64_t>::max());
-  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<uint64_t>::max(),
-                                      std::numeric_limits<uint64_t>::max());
-  VerifySimpleAtoiGood<absl::uint128>(
-      std::numeric_limits<absl::uint128>::max(),
-      std::numeric_limits<absl::uint128>::max());
-
-  // SimpleAtoi(absl::string_view, absl::int128)
-  VerifySimpleAtoiGood<absl::int128>(0, 0);
-  VerifySimpleAtoiGood<absl::int128>(42, 42);
-  VerifySimpleAtoiGood<absl::int128>(-42, -42);
-
-  VerifySimpleAtoiGood<absl::int128>(std::numeric_limits<int32_t>::min(),
-                                      std::numeric_limits<int32_t>::min());
-  VerifySimpleAtoiGood<absl::int128>(std::numeric_limits<int32_t>::max(),
-                                      std::numeric_limits<int32_t>::max());
-  VerifySimpleAtoiGood<absl::int128>(std::numeric_limits<uint32_t>::max(),
-                                      std::numeric_limits<uint32_t>::max());
-  VerifySimpleAtoiGood<absl::int128>(std::numeric_limits<int64_t>::min(),
-                                      std::numeric_limits<int64_t>::min());
-  VerifySimpleAtoiGood<absl::int128>(std::numeric_limits<int64_t>::max(),
-                                      std::numeric_limits<int64_t>::max());
-  VerifySimpleAtoiGood<absl::int128>(std::numeric_limits<uint64_t>::max(),
-                                      std::numeric_limits<uint64_t>::max());
-  VerifySimpleAtoiGood<absl::int128>(
-      std::numeric_limits<absl::int128>::min(),
-      std::numeric_limits<absl::int128>::min());
-  VerifySimpleAtoiGood<absl::int128>(
-      std::numeric_limits<absl::int128>::max(),
-      std::numeric_limits<absl::int128>::max());
-  VerifySimpleAtoiBad<absl::int128>(std::numeric_limits<absl::uint128>::max());
-
-  // Some other types
-  VerifySimpleAtoiGood<int>(-42, -42);
-  VerifySimpleAtoiGood<int32_t>(-42, -42);
-  VerifySimpleAtoiGood<uint32_t>(42, 42);
-  VerifySimpleAtoiGood<unsigned int>(42, 42);
-  VerifySimpleAtoiGood<int64_t>(-42, -42);
-  VerifySimpleAtoiGood<long>(-42, -42);  // NOLINT: runtime-int
-  VerifySimpleAtoiGood<uint64_t>(42, 42);
-  VerifySimpleAtoiGood<size_t>(42, 42);
-  VerifySimpleAtoiGood<std::string::size_type>(42, 42);
-}
-
-TEST(NumbersTest, Atod) {
-  double d;
-  EXPECT_TRUE(absl::SimpleAtod("nan", &d));
-  EXPECT_TRUE(std::isnan(d));
-}
-
-TEST(NumbersTest, Atoenum) {
-  enum E01 {
-    E01_zero = 0,
-    E01_one = 1,
-  };
-
-  VerifySimpleAtoiGood<E01>(E01_zero, E01_zero);
-  VerifySimpleAtoiGood<E01>(E01_one, E01_one);
-
-  enum E_101 {
-    E_101_minusone = -1,
-    E_101_zero = 0,
-    E_101_one = 1,
-  };
-
-  VerifySimpleAtoiGood<E_101>(E_101_minusone, E_101_minusone);
-  VerifySimpleAtoiGood<E_101>(E_101_zero, E_101_zero);
-  VerifySimpleAtoiGood<E_101>(E_101_one, E_101_one);
-
-  enum E_bigint {
-    E_bigint_zero = 0,
-    E_bigint_one = 1,
-    E_bigint_max31 = static_cast<int32_t>(0x7FFFFFFF),
-  };
-
-  VerifySimpleAtoiGood<E_bigint>(E_bigint_zero, E_bigint_zero);
-  VerifySimpleAtoiGood<E_bigint>(E_bigint_one, E_bigint_one);
-  VerifySimpleAtoiGood<E_bigint>(E_bigint_max31, E_bigint_max31);
-
-  enum E_fullint {
-    E_fullint_zero = 0,
-    E_fullint_one = 1,
-    E_fullint_max31 = static_cast<int32_t>(0x7FFFFFFF),
-    E_fullint_min32 = INT32_MIN,
-  };
-
-  VerifySimpleAtoiGood<E_fullint>(E_fullint_zero, E_fullint_zero);
-  VerifySimpleAtoiGood<E_fullint>(E_fullint_one, E_fullint_one);
-  VerifySimpleAtoiGood<E_fullint>(E_fullint_max31, E_fullint_max31);
-  VerifySimpleAtoiGood<E_fullint>(E_fullint_min32, E_fullint_min32);
-
-  enum E_biguint {
-    E_biguint_zero = 0,
-    E_biguint_one = 1,
-    E_biguint_max31 = static_cast<uint32_t>(0x7FFFFFFF),
-    E_biguint_max32 = static_cast<uint32_t>(0xFFFFFFFF),
-  };
-
-  VerifySimpleAtoiGood<E_biguint>(E_biguint_zero, E_biguint_zero);
-  VerifySimpleAtoiGood<E_biguint>(E_biguint_one, E_biguint_one);
-  VerifySimpleAtoiGood<E_biguint>(E_biguint_max31, E_biguint_max31);
-  VerifySimpleAtoiGood<E_biguint>(E_biguint_max32, E_biguint_max32);
-}
-
-TEST(stringtest, safe_strto32_base) {
-  int32_t value;
-  EXPECT_TRUE(safe_strto32_base("0x34234324", &value, 16));
-  EXPECT_EQ(0x34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base("0X34234324", &value, 16));
-  EXPECT_EQ(0x34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base("34234324", &value, 16));
-  EXPECT_EQ(0x34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base("0", &value, 16));
-  EXPECT_EQ(0, value);
-
-  EXPECT_TRUE(safe_strto32_base(" \t\n -0x34234324", &value, 16));
-  EXPECT_EQ(-0x34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base(" \t\n -34234324", &value, 16));
-  EXPECT_EQ(-0x34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base("7654321", &value, 8));
-  EXPECT_EQ(07654321, value);
-
-  EXPECT_TRUE(safe_strto32_base("-01234", &value, 8));
-  EXPECT_EQ(-01234, value);
-
-  EXPECT_FALSE(safe_strto32_base("1834", &value, 8));
-
-  // Autodetect base.
-  EXPECT_TRUE(safe_strto32_base("0", &value, 0));
-  EXPECT_EQ(0, value);
-
-  EXPECT_TRUE(safe_strto32_base("077", &value, 0));
-  EXPECT_EQ(077, value);  // Octal interpretation
-
-  // Leading zero indicates octal, but then followed by invalid digit.
-  EXPECT_FALSE(safe_strto32_base("088", &value, 0));
-
-  // Leading 0x indicated hex, but then followed by invalid digit.
-  EXPECT_FALSE(safe_strto32_base("0xG", &value, 0));
-
-  // Base-10 version.
-  EXPECT_TRUE(safe_strto32_base("34234324", &value, 10));
-  EXPECT_EQ(34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base("0", &value, 10));
-  EXPECT_EQ(0, value);
-
-  EXPECT_TRUE(safe_strto32_base(" \t\n -34234324", &value, 10));
-  EXPECT_EQ(-34234324, value);
-
-  EXPECT_TRUE(safe_strto32_base("34234324 \n\t ", &value, 10));
-  EXPECT_EQ(34234324, value);
-
-  // Invalid ints.
-  EXPECT_FALSE(safe_strto32_base("", &value, 10));
-  EXPECT_FALSE(safe_strto32_base("  ", &value, 10));
-  EXPECT_FALSE(safe_strto32_base("abc", &value, 10));
-  EXPECT_FALSE(safe_strto32_base("34234324a", &value, 10));
-  EXPECT_FALSE(safe_strto32_base("34234.3", &value, 10));
-
-  // Out of bounds.
-  EXPECT_FALSE(safe_strto32_base("2147483648", &value, 10));
-  EXPECT_FALSE(safe_strto32_base("-2147483649", &value, 10));
-
-  // String version.
-  EXPECT_TRUE(safe_strto32_base(std::string("0x1234"), &value, 16));
-  EXPECT_EQ(0x1234, value);
-
-  // Base-10 string version.
-  EXPECT_TRUE(safe_strto32_base("1234", &value, 10));
-  EXPECT_EQ(1234, value);
-}
-
-TEST(stringtest, safe_strto32_range) {
-  // These tests verify underflow/overflow behaviour.
-  int32_t value;
-  EXPECT_FALSE(safe_strto32_base("2147483648", &value, 10));
-  EXPECT_EQ(std::numeric_limits<int32_t>::max(), value);
-
-  EXPECT_TRUE(safe_strto32_base("-2147483648", &value, 10));
-  EXPECT_EQ(std::numeric_limits<int32_t>::min(), value);
-
-  EXPECT_FALSE(safe_strto32_base("-2147483649", &value, 10));
-  EXPECT_EQ(std::numeric_limits<int32_t>::min(), value);
-}
-
-TEST(stringtest, safe_strto64_range) {
-  // These tests verify underflow/overflow behaviour.
-  int64_t value;
-  EXPECT_FALSE(safe_strto64_base("9223372036854775808", &value, 10));
-  EXPECT_EQ(std::numeric_limits<int64_t>::max(), value);
-
-  EXPECT_TRUE(safe_strto64_base("-9223372036854775808", &value, 10));
-  EXPECT_EQ(std::numeric_limits<int64_t>::min(), value);
-
-  EXPECT_FALSE(safe_strto64_base("-9223372036854775809", &value, 10));
-  EXPECT_EQ(std::numeric_limits<int64_t>::min(), value);
-}
-
-TEST(stringtest, safe_strto32_leading_substring) {
-  // These tests verify this comment in numbers.h:
-  // On error, returns false, and sets *value to: [...]
-  //   conversion of leading substring if available ("123@@@" -> 123)
-  //   0 if no leading substring available
-  int32_t value;
-  EXPECT_FALSE(safe_strto32_base("04069@@@", &value, 10));
-  EXPECT_EQ(4069, value);
-
-  EXPECT_FALSE(safe_strto32_base("04069@@@", &value, 8));
-  EXPECT_EQ(0406, value);
-
-  EXPECT_FALSE(safe_strto32_base("04069balloons", &value, 10));
-  EXPECT_EQ(4069, value);
-
-  EXPECT_FALSE(safe_strto32_base("04069balloons", &value, 16));
-  EXPECT_EQ(0x4069ba, value);
-
-  EXPECT_FALSE(safe_strto32_base("@@@", &value, 10));
-  EXPECT_EQ(0, value);  // there was no leading substring
-}
-
-TEST(stringtest, safe_strto64_leading_substring) {
-  // These tests verify this comment in numbers.h:
-  // On error, returns false, and sets *value to: [...]
-  //   conversion of leading substring if available ("123@@@" -> 123)
-  //   0 if no leading substring available
-  int64_t value;
-  EXPECT_FALSE(safe_strto64_base("04069@@@", &value, 10));
-  EXPECT_EQ(4069, value);
-
-  EXPECT_FALSE(safe_strto64_base("04069@@@", &value, 8));
-  EXPECT_EQ(0406, value);
-
-  EXPECT_FALSE(safe_strto64_base("04069balloons", &value, 10));
-  EXPECT_EQ(4069, value);
-
-  EXPECT_FALSE(safe_strto64_base("04069balloons", &value, 16));
-  EXPECT_EQ(0x4069ba, value);
-
-  EXPECT_FALSE(safe_strto64_base("@@@", &value, 10));
-  EXPECT_EQ(0, value);  // there was no leading substring
-}
-
-TEST(stringtest, safe_strto64_base) {
-  int64_t value;
-  EXPECT_TRUE(safe_strto64_base("0x3423432448783446", &value, 16));
-  EXPECT_EQ(int64_t{0x3423432448783446}, value);
-
-  EXPECT_TRUE(safe_strto64_base("3423432448783446", &value, 16));
-  EXPECT_EQ(int64_t{0x3423432448783446}, value);
-
-  EXPECT_TRUE(safe_strto64_base("0", &value, 16));
-  EXPECT_EQ(0, value);
-
-  EXPECT_TRUE(safe_strto64_base(" \t\n -0x3423432448783446", &value, 16));
-  EXPECT_EQ(int64_t{-0x3423432448783446}, value);
-
-  EXPECT_TRUE(safe_strto64_base(" \t\n -3423432448783446", &value, 16));
-  EXPECT_EQ(int64_t{-0x3423432448783446}, value);
-
-  EXPECT_TRUE(safe_strto64_base("123456701234567012", &value, 8));
-  EXPECT_EQ(int64_t{0123456701234567012}, value);
-
-  EXPECT_TRUE(safe_strto64_base("-017777777777777", &value, 8));
-  EXPECT_EQ(int64_t{-017777777777777}, value);
-
-  EXPECT_FALSE(safe_strto64_base("19777777777777", &value, 8));
-
-  // Autodetect base.
-  EXPECT_TRUE(safe_strto64_base("0", &value, 0));
-  EXPECT_EQ(0, value);
-
-  EXPECT_TRUE(safe_strto64_base("077", &value, 0));
-  EXPECT_EQ(077, value);  // Octal interpretation
-
-  // Leading zero indicates octal, but then followed by invalid digit.
-  EXPECT_FALSE(safe_strto64_base("088", &value, 0));
-
-  // Leading 0x indicated hex, but then followed by invalid digit.
-  EXPECT_FALSE(safe_strto64_base("0xG", &value, 0));
-
-  // Base-10 version.
-  EXPECT_TRUE(safe_strto64_base("34234324487834466", &value, 10));
-  EXPECT_EQ(int64_t{34234324487834466}, value);
-
-  EXPECT_TRUE(safe_strto64_base("0", &value, 10));
-  EXPECT_EQ(0, value);
-
-  EXPECT_TRUE(safe_strto64_base(" \t\n -34234324487834466", &value, 10));
-  EXPECT_EQ(int64_t{-34234324487834466}, value);
-
-  EXPECT_TRUE(safe_strto64_base("34234324487834466 \n\t ", &value, 10));
-  EXPECT_EQ(int64_t{34234324487834466}, value);
-
-  // Invalid ints.
-  EXPECT_FALSE(safe_strto64_base("", &value, 10));
-  EXPECT_FALSE(safe_strto64_base("  ", &value, 10));
-  EXPECT_FALSE(safe_strto64_base("abc", &value, 10));
-  EXPECT_FALSE(safe_strto64_base("34234324487834466a", &value, 10));
-  EXPECT_FALSE(safe_strto64_base("34234487834466.3", &value, 10));
-
-  // Out of bounds.
-  EXPECT_FALSE(safe_strto64_base("9223372036854775808", &value, 10));
-  EXPECT_FALSE(safe_strto64_base("-9223372036854775809", &value, 10));
-
-  // String version.
-  EXPECT_TRUE(safe_strto64_base(std::string("0x1234"), &value, 16));
-  EXPECT_EQ(0x1234, value);
-
-  // Base-10 string version.
-  EXPECT_TRUE(safe_strto64_base("1234", &value, 10));
-  EXPECT_EQ(1234, value);
-}
-
-const size_t kNumRandomTests = 10000;
-
-template <typename IntType>
-void test_random_integer_parse_base(bool (*parse_func)(absl::string_view,
-                                                       IntType* value,
-                                                       int base)) {
-  using RandomEngine = std::minstd_rand0;
-  std::random_device rd;
-  RandomEngine rng(rd());
-  std::uniform_int_distribution<IntType> random_int(
-      std::numeric_limits<IntType>::min());
-  std::uniform_int_distribution<int> random_base(2, 35);
-  for (size_t i = 0; i < kNumRandomTests; i++) {
-    IntType value = random_int(rng);
-    int base = random_base(rng);
-    std::string str_value;
-    EXPECT_TRUE(Itoa<IntType>(value, base, &str_value));
-    IntType parsed_value;
-
-    // Test successful parse
-    EXPECT_TRUE(parse_func(str_value, &parsed_value, base));
-    EXPECT_EQ(parsed_value, value);
-
-    // Test overflow
-    EXPECT_FALSE(
-        parse_func(absl::StrCat(std::numeric_limits<IntType>::max(), value),
-                   &parsed_value, base));
-
-    // Test underflow
-    if (std::numeric_limits<IntType>::min() < 0) {
-      EXPECT_FALSE(
-          parse_func(absl::StrCat(std::numeric_limits<IntType>::min(), value),
-                     &parsed_value, base));
-    } else {
-      EXPECT_FALSE(parse_func(absl::StrCat("-", value), &parsed_value, base));
-    }
-  }
-}
-
-TEST(stringtest, safe_strto32_random) {
-  test_random_integer_parse_base<int32_t>(&safe_strto32_base);
-}
-TEST(stringtest, safe_strto64_random) {
-  test_random_integer_parse_base<int64_t>(&safe_strto64_base);
-}
-TEST(stringtest, safe_strtou32_random) {
-  test_random_integer_parse_base<uint32_t>(&safe_strtou32_base);
-}
-TEST(stringtest, safe_strtou64_random) {
-  test_random_integer_parse_base<uint64_t>(&safe_strtou64_base);
-}
-TEST(stringtest, safe_strtou128_random) {
-  // random number generators don't work for uint128, and
-  // uint128 can be streamed but not StrCat'd, so this code must be custom
-  // implemented for uint128, but is generally the same as what's above.
-  // test_random_integer_parse_base<absl::uint128>(
-  //     &absl::numbers_internal::safe_strtou128_base);
-  using RandomEngine = std::minstd_rand0;
-  using IntType = absl::uint128;
-  constexpr auto parse_func = &absl::numbers_internal::safe_strtou128_base;
-
-  std::random_device rd;
-  RandomEngine rng(rd());
-  std::uniform_int_distribution<uint64_t> random_uint64(
-      std::numeric_limits<uint64_t>::min());
-  std::uniform_int_distribution<int> random_base(2, 35);
-
-  for (size_t i = 0; i < kNumRandomTests; i++) {
-    IntType value = random_uint64(rng);
-    value = (value << 64) + random_uint64(rng);
-    int base = random_base(rng);
-    std::string str_value;
-    EXPECT_TRUE(Itoa<IntType>(value, base, &str_value));
-    IntType parsed_value;
-
-    // Test successful parse
-    EXPECT_TRUE(parse_func(str_value, &parsed_value, base));
-    EXPECT_EQ(parsed_value, value);
-
-    // Test overflow
-    std::string s;
-    absl::strings_internal::OStringStream(&s)
-        << std::numeric_limits<IntType>::max() << value;
-    EXPECT_FALSE(parse_func(s, &parsed_value, base));
-
-    // Test underflow
-    s.clear();
-    absl::strings_internal::OStringStream(&s) << "-" << value;
-    EXPECT_FALSE(parse_func(s, &parsed_value, base));
-  }
-}
-TEST(stringtest, safe_strto128_random) {
-  // random number generators don't work for int128, and
-  // int128 can be streamed but not StrCat'd, so this code must be custom
-  // implemented for int128, but is generally the same as what's above.
-  // test_random_integer_parse_base<absl::int128>(
-  //     &absl::numbers_internal::safe_strto128_base);
-  using RandomEngine = std::minstd_rand0;
-  using IntType = absl::int128;
-  constexpr auto parse_func = &absl::numbers_internal::safe_strto128_base;
-
-  std::random_device rd;
-  RandomEngine rng(rd());
-  std::uniform_int_distribution<int64_t> random_int64(
-      std::numeric_limits<int64_t>::min());
-  std::uniform_int_distribution<uint64_t> random_uint64(
-      std::numeric_limits<uint64_t>::min());
-  std::uniform_int_distribution<int> random_base(2, 35);
-
-  for (size_t i = 0; i < kNumRandomTests; ++i) {
-    int64_t high = random_int64(rng);
-    uint64_t low = random_uint64(rng);
-    IntType value = absl::MakeInt128(high, low);
-
-    int base = random_base(rng);
-    std::string str_value;
-    EXPECT_TRUE(Itoa<IntType>(value, base, &str_value));
-    IntType parsed_value;
-
-    // Test successful parse
-    EXPECT_TRUE(parse_func(str_value, &parsed_value, base));
-    EXPECT_EQ(parsed_value, value);
-
-    // Test overflow
-    std::string s;
-    absl::strings_internal::OStringStream(&s)
-        << std::numeric_limits<IntType>::max() << value;
-    EXPECT_FALSE(parse_func(s, &parsed_value, base));
-
-    // Test underflow
-    s.clear();
-    absl::strings_internal::OStringStream(&s)
-        << std::numeric_limits<IntType>::min() << value;
-    EXPECT_FALSE(parse_func(s, &parsed_value, base));
-  }
-}
-
-TEST(stringtest, safe_strtou32_base) {
-  for (int i = 0; strtouint32_test_cases()[i].str != nullptr; ++i) {
-    const auto& e = strtouint32_test_cases()[i];
-    uint32_t value;
-    EXPECT_EQ(e.expect_ok, safe_strtou32_base(e.str, &value, e.base))
-        << "str=\"" << e.str << "\" base=" << e.base;
-    if (e.expect_ok) {
-      EXPECT_EQ(e.expected, value) << "i=" << i << " str=\"" << e.str
-                                   << "\" base=" << e.base;
-    }
-  }
-}
-
-TEST(stringtest, safe_strtou32_base_length_delimited) {
-  for (int i = 0; strtouint32_test_cases()[i].str != nullptr; ++i) {
-    const auto& e = strtouint32_test_cases()[i];
-    std::string tmp(e.str);
-    tmp.append("12");  // Adds garbage at the end.
-
-    uint32_t value;
-    EXPECT_EQ(e.expect_ok,
-              safe_strtou32_base(absl::string_view(tmp.data(), strlen(e.str)),
-                                 &value, e.base))
-        << "str=\"" << e.str << "\" base=" << e.base;
-    if (e.expect_ok) {
-      EXPECT_EQ(e.expected, value) << "i=" << i << " str=" << e.str
-                                   << " base=" << e.base;
-    }
-  }
-}
-
-TEST(stringtest, safe_strtou64_base) {
-  for (int i = 0; strtouint64_test_cases()[i].str != nullptr; ++i) {
-    const auto& e = strtouint64_test_cases()[i];
-    uint64_t value;
-    EXPECT_EQ(e.expect_ok, safe_strtou64_base(e.str, &value, e.base))
-        << "str=\"" << e.str << "\" base=" << e.base;
-    if (e.expect_ok) {
-      EXPECT_EQ(e.expected, value) << "str=" << e.str << " base=" << e.base;
-    }
-  }
-}
-
-TEST(stringtest, safe_strtou64_base_length_delimited) {
-  for (int i = 0; strtouint64_test_cases()[i].str != nullptr; ++i) {
-    const auto& e = strtouint64_test_cases()[i];
-    std::string tmp(e.str);
-    tmp.append("12");  // Adds garbage at the end.
-
-    uint64_t value;
-    EXPECT_EQ(e.expect_ok,
-              safe_strtou64_base(absl::string_view(tmp.data(), strlen(e.str)),
-                                 &value, e.base))
-        << "str=\"" << e.str << "\" base=" << e.base;
-    if (e.expect_ok) {
-      EXPECT_EQ(e.expected, value) << "str=\"" << e.str << "\" base=" << e.base;
-    }
-  }
-}
-
-// feenableexcept() and fedisableexcept() are extensions supported by some libc
-// implementations.
-#if defined(__GLIBC__) || defined(__BIONIC__)
-#define ABSL_HAVE_FEENABLEEXCEPT 1
-#define ABSL_HAVE_FEDISABLEEXCEPT 1
-#endif
-
-class SimpleDtoaTest : public testing::Test {
- protected:
-  void SetUp() override {
-    // Store the current floating point env & clear away any pending exceptions.
-    feholdexcept(&fp_env_);
-#ifdef ABSL_HAVE_FEENABLEEXCEPT
-    // Turn on floating point exceptions.
-    feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
-#endif
-  }
-
-  void TearDown() override {
-    // Restore the floating point environment to the original state.
-    // In theory fedisableexcept is unnecessary; fesetenv will also do it.
-    // In practice, our toolchains have subtle bugs.
-#ifdef ABSL_HAVE_FEDISABLEEXCEPT
-    fedisableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
-#endif
-    fesetenv(&fp_env_);
-  }
-
-  std::string ToNineDigits(double value) {
-    char buffer[16];  // more than enough for %.9g
-    snprintf(buffer, sizeof(buffer), "%.9g", value);
-    return buffer;
-  }
-
-  fenv_t fp_env_;
-};
-
-// Run the given runnable functor for "cases" test cases, chosen over the
-// available range of float.  pi and e and 1/e are seeded, and then all
-// available integer powers of 2 and 10 are multiplied against them.  In
-// addition to trying all those values, we try the next higher and next lower
-// float, and then we add additional test cases evenly distributed between them.
-// Each test case is passed to runnable as both a positive and negative value.
-template <typename R>
-void ExhaustiveFloat(uint32_t cases, R&& runnable) {
-  runnable(0.0f);
-  runnable(-0.0f);
-  if (cases >= 2e9) {  // more than 2 billion?  Might as well run them all.
-    for (float f = 0; f < std::numeric_limits<float>::max(); ) {
-      f = nextafterf(f, std::numeric_limits<float>::max());
-      runnable(-f);
-      runnable(f);
-    }
-    return;
-  }
-  std::set<float> floats = {3.4028234e38f};
-  for (float f : {1.0, 3.14159265, 2.718281828, 1 / 2.718281828}) {
-    for (float testf = f; testf != 0; testf *= 0.1f) floats.insert(testf);
-    for (float testf = f; testf != 0; testf *= 0.5f) floats.insert(testf);
-    for (float testf = f; testf < 3e38f / 2; testf *= 2.0f)
-      floats.insert(testf);
-    for (float testf = f; testf < 3e38f / 10; testf *= 10) floats.insert(testf);
-  }
-
-  float last = *floats.begin();
-
-  runnable(last);
-  runnable(-last);
-  int iters_per_float = cases / floats.size();
-  if (iters_per_float == 0) iters_per_float = 1;
-  for (float f : floats) {
-    if (f == last) continue;
-    float testf = std::nextafter(last, std::numeric_limits<float>::max());
-    runnable(testf);
-    runnable(-testf);
-    last = testf;
-    if (f == last) continue;
-    double step = (double{f} - last) / iters_per_float;
-    for (double d = last + step; d < f; d += step) {
-      testf = d;
-      if (testf != last) {
-        runnable(testf);
-        runnable(-testf);
-        last = testf;
-      }
-    }
-    testf = std::nextafter(f, 0.0f);
-    if (testf > last) {
-      runnable(testf);
-      runnable(-testf);
-      last = testf;
-    }
-    if (f != last) {
-      runnable(f);
-      runnable(-f);
-      last = f;
-    }
-  }
-}
-
-TEST_F(SimpleDtoaTest, ExhaustiveDoubleToSixDigits) {
-  uint64_t test_count = 0;
-  std::vector<double> mismatches;
-  auto checker = [&](double d) {
-    if (d != d) return;  // rule out NaNs
-    ++test_count;
-    char sixdigitsbuf[kSixDigitsToBufferSize] = {0};
-    SixDigitsToBuffer(d, sixdigitsbuf);
-    char snprintfbuf[kSixDigitsToBufferSize] = {0};
-    snprintf(snprintfbuf, kSixDigitsToBufferSize, "%g", d);
-    if (strcmp(sixdigitsbuf, snprintfbuf) != 0) {
-      mismatches.push_back(d);
-      if (mismatches.size() < 10) {
-        ABSL_RAW_LOG(ERROR, "%s",
-                     absl::StrCat("Six-digit failure with double.  ", "d=", d,
-                                  "=", d, " sixdigits=", sixdigitsbuf,
-                                  " printf(%g)=", snprintfbuf)
-                         .c_str());
-      }
-    }
-  };
-  // Some quick sanity checks...
-  checker(5e-324);
-  checker(1e-308);
-  checker(1.0);
-  checker(1.000005);
-  checker(1.7976931348623157e308);
-  checker(0.00390625);
-#ifndef _MSC_VER
-  // on MSVC, snprintf() rounds it to 0.00195313. SixDigitsToBuffer() rounds it
-  // to 0.00195312 (round half to even).
-  checker(0.001953125);
-#endif
-  checker(0.005859375);
-  // Some cases where the rounding is very very close
-  checker(1.089095e-15);
-  checker(3.274195e-55);
-  checker(6.534355e-146);
-  checker(2.920845e+234);
-
-  if (mismatches.empty()) {
-    test_count = 0;
-    ExhaustiveFloat(kFloatNumCases, checker);
-
-    test_count = 0;
-    std::vector<int> digit_testcases{
-        100000, 100001, 100002, 100005, 100010, 100020, 100050, 100100,  // misc
-        195312, 195313,  // 1.953125 is a case where we round down, just barely.
-        200000, 500000, 800000,  // misc mid-range cases
-        585937, 585938,  // 5.859375 is a case where we round up, just barely.
-        900000, 990000, 999000, 999900, 999990, 999996, 999997, 999998, 999999};
-    if (kFloatNumCases >= 1e9) {
-      // If at least 1 billion test cases were requested, user wants an
-      // exhaustive test. So let's test all mantissas, too.
-      constexpr int min_mantissa = 100000, max_mantissa = 999999;
-      digit_testcases.resize(max_mantissa - min_mantissa + 1);
-      std::iota(digit_testcases.begin(), digit_testcases.end(), min_mantissa);
-    }
-
-    for (int exponent = -324; exponent <= 308; ++exponent) {
-      double powten = absl::strings_internal::Pow10(exponent);
-      if (powten == 0) powten = 5e-324;
-      if (kFloatNumCases >= 1e9) {
-        // The exhaustive test takes a very long time, so log progress.
-        char buf[kSixDigitsToBufferSize];
-        ABSL_RAW_LOG(
-            INFO, "%s",
-            absl::StrCat("Exp ", exponent, " powten=", powten, "(", powten,
-                         ") (",
-                         std::string(buf, SixDigitsToBuffer(powten, buf)), ")")
-                .c_str());
-      }
-      for (int digits : digit_testcases) {
-        if (exponent == 308 && digits >= 179769) break;  // don't overflow!
-        double digiform = (digits + 0.5) * 0.00001;
-        double testval = digiform * powten;
-        double pretestval = nextafter(testval, 0);
-        double posttestval = nextafter(testval, 1.7976931348623157e308);
-        checker(testval);
-        checker(pretestval);
-        checker(posttestval);
-      }
-    }
-  } else {
-    EXPECT_EQ(mismatches.size(), 0);
-    for (size_t i = 0; i < mismatches.size(); ++i) {
-      if (i > 100) i = mismatches.size() - 1;
-      double d = mismatches[i];
-      char sixdigitsbuf[kSixDigitsToBufferSize] = {0};
-      SixDigitsToBuffer(d, sixdigitsbuf);
-      char snprintfbuf[kSixDigitsToBufferSize] = {0};
-      snprintf(snprintfbuf, kSixDigitsToBufferSize, "%g", d);
-      double before = nextafter(d, 0.0);
-      double after = nextafter(d, 1.7976931348623157e308);
-      char b1[32], b2[kSixDigitsToBufferSize];
-      ABSL_RAW_LOG(
-          ERROR, "%s",
-          absl::StrCat(
-              "Mismatch #", i, "  d=", d, " (", ToNineDigits(d), ")",
-              " sixdigits='", sixdigitsbuf, "'", " snprintf='", snprintfbuf,
-              "'", " Before.=", PerfectDtoa(before), " ",
-              (SixDigitsToBuffer(before, b2), b2),
-              " vs snprintf=", (snprintf(b1, sizeof(b1), "%g", before), b1),
-              " Perfect=", PerfectDtoa(d), " ", (SixDigitsToBuffer(d, b2), b2),
-              " vs snprintf=", (snprintf(b1, sizeof(b1), "%g", d), b1),
-              " After.=.", PerfectDtoa(after), " ",
-              (SixDigitsToBuffer(after, b2), b2),
-              " vs snprintf=", (snprintf(b1, sizeof(b1), "%g", after), b1))
-              .c_str());
-    }
-  }
-}
-
-TEST(StrToInt32, Partial) {
-  struct Int32TestLine {
-    std::string input;
-    bool status;
-    int32_t value;
-  };
-  const int32_t int32_min = std::numeric_limits<int32_t>::min();
-  const int32_t int32_max = std::numeric_limits<int32_t>::max();
-  Int32TestLine int32_test_line[] = {
-      {"", false, 0},
-      {" ", false, 0},
-      {"-", false, 0},
-      {"123@@@", false, 123},
-      {absl::StrCat(int32_min, int32_max), false, int32_min},
-      {absl::StrCat(int32_max, int32_max), false, int32_max},
-  };
-
-  for (const Int32TestLine& test_line : int32_test_line) {
-    int32_t value = -2;
-    bool status = safe_strto32_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = -2;
-    status = safe_strto32_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = -2;
-    status = safe_strto32_base(absl::string_view(test_line.input), &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-  }
-}
-
-TEST(StrToUint32, Partial) {
-  struct Uint32TestLine {
-    std::string input;
-    bool status;
-    uint32_t value;
-  };
-  const uint32_t uint32_max = std::numeric_limits<uint32_t>::max();
-  Uint32TestLine uint32_test_line[] = {
-      {"", false, 0},
-      {" ", false, 0},
-      {"-", false, 0},
-      {"123@@@", false, 123},
-      {absl::StrCat(uint32_max, uint32_max), false, uint32_max},
-  };
-
-  for (const Uint32TestLine& test_line : uint32_test_line) {
-    uint32_t value = 2;
-    bool status = safe_strtou32_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = 2;
-    status = safe_strtou32_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = 2;
-    status = safe_strtou32_base(absl::string_view(test_line.input), &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-  }
-}
-
-TEST(StrToInt64, Partial) {
-  struct Int64TestLine {
-    std::string input;
-    bool status;
-    int64_t value;
-  };
-  const int64_t int64_min = std::numeric_limits<int64_t>::min();
-  const int64_t int64_max = std::numeric_limits<int64_t>::max();
-  Int64TestLine int64_test_line[] = {
-      {"", false, 0},
-      {" ", false, 0},
-      {"-", false, 0},
-      {"123@@@", false, 123},
-      {absl::StrCat(int64_min, int64_max), false, int64_min},
-      {absl::StrCat(int64_max, int64_max), false, int64_max},
-  };
-
-  for (const Int64TestLine& test_line : int64_test_line) {
-    int64_t value = -2;
-    bool status = safe_strto64_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = -2;
-    status = safe_strto64_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = -2;
-    status = safe_strto64_base(absl::string_view(test_line.input), &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-  }
-}
-
-TEST(StrToUint64, Partial) {
-  struct Uint64TestLine {
-    std::string input;
-    bool status;
-    uint64_t value;
-  };
-  const uint64_t uint64_max = std::numeric_limits<uint64_t>::max();
-  Uint64TestLine uint64_test_line[] = {
-      {"", false, 0},
-      {" ", false, 0},
-      {"-", false, 0},
-      {"123@@@", false, 123},
-      {absl::StrCat(uint64_max, uint64_max), false, uint64_max},
-  };
-
-  for (const Uint64TestLine& test_line : uint64_test_line) {
-    uint64_t value = 2;
-    bool status = safe_strtou64_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = 2;
-    status = safe_strtou64_base(test_line.input, &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-    value = 2;
-    status = safe_strtou64_base(absl::string_view(test_line.input), &value, 10);
-    EXPECT_EQ(test_line.status, status) << test_line.input;
-    EXPECT_EQ(test_line.value, value) << test_line.input;
-  }
-}
-
-TEST(StrToInt32Base, PrefixOnly) {
-  struct Int32TestLine {
-    std::string input;
-    bool status;
-    int32_t value;
-  };
-  Int32TestLine int32_test_line[] = {
-    { "", false, 0 },
-    { "-", false, 0 },
-    { "-0", true, 0 },
-    { "0", true, 0 },
-    { "0x", false, 0 },
-    { "-0x", false, 0 },
-  };
-  const int base_array[] = { 0, 2, 8, 10, 16 };
-
-  for (const Int32TestLine& line : int32_test_line) {
-    for (const int base : base_array) {
-      int32_t value = 2;
-      bool status = safe_strto32_base(line.input.c_str(), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strto32_base(line.input, &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strto32_base(absl::string_view(line.input), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-    }
-  }
-}
-
-TEST(StrToUint32Base, PrefixOnly) {
-  struct Uint32TestLine {
-    std::string input;
-    bool status;
-    uint32_t value;
-  };
-  Uint32TestLine uint32_test_line[] = {
-    { "", false, 0 },
-    { "0", true, 0 },
-    { "0x", false, 0 },
-  };
-  const int base_array[] = { 0, 2, 8, 10, 16 };
-
-  for (const Uint32TestLine& line : uint32_test_line) {
-    for (const int base : base_array) {
-      uint32_t value = 2;
-      bool status = safe_strtou32_base(line.input.c_str(), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strtou32_base(line.input, &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strtou32_base(absl::string_view(line.input), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-    }
-  }
-}
-
-TEST(StrToInt64Base, PrefixOnly) {
-  struct Int64TestLine {
-    std::string input;
-    bool status;
-    int64_t value;
-  };
-  Int64TestLine int64_test_line[] = {
-    { "", false, 0 },
-    { "-", false, 0 },
-    { "-0", true, 0 },
-    { "0", true, 0 },
-    { "0x", false, 0 },
-    { "-0x", false, 0 },
-  };
-  const int base_array[] = { 0, 2, 8, 10, 16 };
-
-  for (const Int64TestLine& line : int64_test_line) {
-    for (const int base : base_array) {
-      int64_t value = 2;
-      bool status = safe_strto64_base(line.input.c_str(), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strto64_base(line.input, &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strto64_base(absl::string_view(line.input), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-    }
-  }
-}
-
-TEST(StrToUint64Base, PrefixOnly) {
-  struct Uint64TestLine {
-    std::string input;
-    bool status;
-    uint64_t value;
-  };
-  Uint64TestLine uint64_test_line[] = {
-    { "", false, 0 },
-    { "0", true, 0 },
-    { "0x", false, 0 },
-  };
-  const int base_array[] = { 0, 2, 8, 10, 16 };
-
-  for (const Uint64TestLine& line : uint64_test_line) {
-    for (const int base : base_array) {
-      uint64_t value = 2;
-      bool status = safe_strtou64_base(line.input.c_str(), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strtou64_base(line.input, &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-      value = 2;
-      status = safe_strtou64_base(absl::string_view(line.input), &value, base);
-      EXPECT_EQ(line.status, status) << line.input << " " << base;
-      EXPECT_EQ(line.value, value) << line.input << " " << base;
-    }
-  }
-}
-
-void TestFastHexToBufferZeroPad16(uint64_t v) {
-  char buf[16];
-  auto digits = absl::numbers_internal::FastHexToBufferZeroPad16(v, buf);
-  absl::string_view res(buf, 16);
-  char buf2[17];
-  snprintf(buf2, sizeof(buf2), "%016" PRIx64, v);
-  EXPECT_EQ(res, buf2) << v;
-  size_t expected_digits = snprintf(buf2, sizeof(buf2), "%" PRIx64, v);
-  EXPECT_EQ(digits, expected_digits) << v;
-}
-
-TEST(FastHexToBufferZeroPad16, Smoke) {
-  TestFastHexToBufferZeroPad16(std::numeric_limits<uint64_t>::min());
-  TestFastHexToBufferZeroPad16(std::numeric_limits<uint64_t>::max());
-  TestFastHexToBufferZeroPad16(std::numeric_limits<int64_t>::min());
-  TestFastHexToBufferZeroPad16(std::numeric_limits<int64_t>::max());
-  absl::BitGen rng;
-  for (int i = 0; i < 100000; ++i) {
-    TestFastHexToBufferZeroPad16(
-        absl::LogUniform(rng, std::numeric_limits<uint64_t>::min(),
-                         std::numeric_limits<uint64_t>::max()));
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_cat.cc b/third_party/abseil/absl/strings/str_cat.cc
deleted file mode 100644
index dd5d25b..0000000
--- a/third_party/abseil/absl/strings/str_cat.cc
+++ /dev/null
@@ -1,246 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_cat.h"
-
-#include <assert.h>
-
-#include <algorithm>
-#include <cstdint>
-#include <cstring>
-
-#include "absl/strings/ascii.h"
-#include "absl/strings/internal/resize_uninitialized.h"
-#include "absl/strings/numbers.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-AlphaNum::AlphaNum(Hex hex) {
-  static_assert(numbers_internal::kFastToBufferSize >= 32,
-                "This function only works when output buffer >= 32 bytes long");
-  char* const end = &digits_[numbers_internal::kFastToBufferSize];
-  auto real_width =
-      absl::numbers_internal::FastHexToBufferZeroPad16(hex.value, end - 16);
-  if (real_width >= hex.width) {
-    piece_ = absl::string_view(end - real_width, real_width);
-  } else {
-    // Pad first 16 chars because FastHexToBufferZeroPad16 pads only to 16 and
-    // max pad width can be up to 20.
-    std::memset(end - 32, hex.fill, 16);
-    // Patch up everything else up to the real_width.
-    std::memset(end - real_width - 16, hex.fill, 16);
-    piece_ = absl::string_view(end - hex.width, hex.width);
-  }
-}
-
-AlphaNum::AlphaNum(Dec dec) {
-  assert(dec.width <= numbers_internal::kFastToBufferSize);
-  char* const end = &digits_[numbers_internal::kFastToBufferSize];
-  char* const minfill = end - dec.width;
-  char* writer = end;
-  uint64_t value = dec.value;
-  bool neg = dec.neg;
-  while (value > 9) {
-    *--writer = '0' + (value % 10);
-    value /= 10;
-  }
-  *--writer = '0' + value;
-  if (neg) *--writer = '-';
-
-  ptrdiff_t fillers = writer - minfill;
-  if (fillers > 0) {
-    // Tricky: if the fill character is ' ', then it's <fill><+/-><digits>
-    // But...: if the fill character is '0', then it's <+/-><fill><digits>
-    bool add_sign_again = false;
-    if (neg && dec.fill == '0') {  // If filling with '0',
-      ++writer;                    // ignore the sign we just added
-      add_sign_again = true;       // and re-add the sign later.
-    }
-    writer -= fillers;
-    std::fill_n(writer, fillers, dec.fill);
-    if (add_sign_again) *--writer = '-';
-  }
-
-  piece_ = absl::string_view(writer, end - writer);
-}
-
-// ----------------------------------------------------------------------
-// StrCat()
-//    This merges the given strings or integers, with no delimiter. This
-//    is designed to be the fastest possible way to construct a string out
-//    of a mix of raw C strings, string_views, strings, and integer values.
-// ----------------------------------------------------------------------
-
-// Append is merely a version of memcpy that returns the address of the byte
-// after the area just overwritten.
-static char* Append(char* out, const AlphaNum& x) {
-  // memcpy is allowed to overwrite arbitrary memory, so doing this after the
-  // call would force an extra fetch of x.size().
-  char* after = out + x.size();
-  if (x.size() != 0) {
-    memcpy(out, x.data(), x.size());
-  }
-  return after;
-}
-
-std::string StrCat(const AlphaNum& a, const AlphaNum& b) {
-  std::string result;
-  absl::strings_internal::STLStringResizeUninitialized(&result,
-                                                       a.size() + b.size());
-  char* const begin = &result[0];
-  char* out = begin;
-  out = Append(out, a);
-  out = Append(out, b);
-  assert(out == begin + result.size());
-  return result;
-}
-
-std::string StrCat(const AlphaNum& a, const AlphaNum& b, const AlphaNum& c) {
-  std::string result;
-  strings_internal::STLStringResizeUninitialized(
-      &result, a.size() + b.size() + c.size());
-  char* const begin = &result[0];
-  char* out = begin;
-  out = Append(out, a);
-  out = Append(out, b);
-  out = Append(out, c);
-  assert(out == begin + result.size());
-  return result;
-}
-
-std::string StrCat(const AlphaNum& a, const AlphaNum& b, const AlphaNum& c,
-                   const AlphaNum& d) {
-  std::string result;
-  strings_internal::STLStringResizeUninitialized(
-      &result, a.size() + b.size() + c.size() + d.size());
-  char* const begin = &result[0];
-  char* out = begin;
-  out = Append(out, a);
-  out = Append(out, b);
-  out = Append(out, c);
-  out = Append(out, d);
-  assert(out == begin + result.size());
-  return result;
-}
-
-namespace strings_internal {
-
-// Do not call directly - these are not part of the public API.
-std::string CatPieces(std::initializer_list<absl::string_view> pieces) {
-  std::string result;
-  size_t total_size = 0;
-  for (const absl::string_view& piece : pieces) total_size += piece.size();
-  strings_internal::STLStringResizeUninitialized(&result, total_size);
-
-  char* const begin = &result[0];
-  char* out = begin;
-  for (const absl::string_view& piece : pieces) {
-    const size_t this_size = piece.size();
-    if (this_size != 0) {
-      memcpy(out, piece.data(), this_size);
-      out += this_size;
-    }
-  }
-  assert(out == begin + result.size());
-  return result;
-}
-
-// It's possible to call StrAppend with an absl::string_view that is itself a
-// fragment of the string we're appending to.  However the results of this are
-// random. Therefore, check for this in debug mode.  Use unsigned math so we
-// only have to do one comparison. Note, there's an exception case: appending an
-// empty string is always allowed.
-#define ASSERT_NO_OVERLAP(dest, src) \
-  assert(((src).size() == 0) ||      \
-         (uintptr_t((src).data() - (dest).data()) > uintptr_t((dest).size())))
-
-void AppendPieces(std::string* dest,
-                  std::initializer_list<absl::string_view> pieces) {
-  size_t old_size = dest->size();
-  size_t total_size = old_size;
-  for (const absl::string_view& piece : pieces) {
-    ASSERT_NO_OVERLAP(*dest, piece);
-    total_size += piece.size();
-  }
-  strings_internal::STLStringResizeUninitialized(dest, total_size);
-
-  char* const begin = &(*dest)[0];
-  char* out = begin + old_size;
-  for (const absl::string_view& piece : pieces) {
-    const size_t this_size = piece.size();
-    if (this_size != 0) {
-      memcpy(out, piece.data(), this_size);
-      out += this_size;
-    }
-  }
-  assert(out == begin + dest->size());
-}
-
-}  // namespace strings_internal
-
-void StrAppend(std::string* dest, const AlphaNum& a) {
-  ASSERT_NO_OVERLAP(*dest, a);
-  dest->append(a.data(), a.size());
-}
-
-void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b) {
-  ASSERT_NO_OVERLAP(*dest, a);
-  ASSERT_NO_OVERLAP(*dest, b);
-  std::string::size_type old_size = dest->size();
-  strings_internal::STLStringResizeUninitialized(
-      dest, old_size + a.size() + b.size());
-  char* const begin = &(*dest)[0];
-  char* out = begin + old_size;
-  out = Append(out, a);
-  out = Append(out, b);
-  assert(out == begin + dest->size());
-}
-
-void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b,
-               const AlphaNum& c) {
-  ASSERT_NO_OVERLAP(*dest, a);
-  ASSERT_NO_OVERLAP(*dest, b);
-  ASSERT_NO_OVERLAP(*dest, c);
-  std::string::size_type old_size = dest->size();
-  strings_internal::STLStringResizeUninitialized(
-      dest, old_size + a.size() + b.size() + c.size());
-  char* const begin = &(*dest)[0];
-  char* out = begin + old_size;
-  out = Append(out, a);
-  out = Append(out, b);
-  out = Append(out, c);
-  assert(out == begin + dest->size());
-}
-
-void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b,
-               const AlphaNum& c, const AlphaNum& d) {
-  ASSERT_NO_OVERLAP(*dest, a);
-  ASSERT_NO_OVERLAP(*dest, b);
-  ASSERT_NO_OVERLAP(*dest, c);
-  ASSERT_NO_OVERLAP(*dest, d);
-  std::string::size_type old_size = dest->size();
-  strings_internal::STLStringResizeUninitialized(
-      dest, old_size + a.size() + b.size() + c.size() + d.size());
-  char* const begin = &(*dest)[0];
-  char* out = begin + old_size;
-  out = Append(out, a);
-  out = Append(out, b);
-  out = Append(out, c);
-  out = Append(out, d);
-  assert(out == begin + dest->size());
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/str_cat.h b/third_party/abseil/absl/strings/str_cat.h
deleted file mode 100644
index a8a85c7..0000000
--- a/third_party/abseil/absl/strings/str_cat.h
+++ /dev/null
@@ -1,408 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: str_cat.h
-// -----------------------------------------------------------------------------
-//
-// This package contains functions for efficiently concatenating and appending
-// strings: `StrCat()` and `StrAppend()`. Most of the work within these routines
-// is actually handled through use of a special AlphaNum type, which was
-// designed to be used as a parameter type that efficiently manages conversion
-// to strings and avoids copies in the above operations.
-//
-// Any routine accepting either a string or a number may accept `AlphaNum`.
-// The basic idea is that by accepting a `const AlphaNum &` as an argument
-// to your function, your callers will automagically convert bools, integers,
-// and floating point values to strings for you.
-//
-// NOTE: Use of `AlphaNum` outside of the //absl/strings package is unsupported
-// except for the specific case of function parameters of type `AlphaNum` or
-// `const AlphaNum &`. In particular, instantiating `AlphaNum` directly as a
-// stack variable is not supported.
-//
-// Conversion from 8-bit values is not accepted because, if it were, then an
-// attempt to pass ':' instead of ":" might result in a 58 ending up in your
-// result.
-//
-// Bools convert to "0" or "1". Pointers to types other than `char *` are not
-// valid inputs. No output is generated for null `char *` pointers.
-//
-// Floating point numbers are formatted with six-digit precision, which is
-// the default for "std::cout <<" or printf "%g" (the same as "%.6g").
-//
-// You can convert to hexadecimal output rather than decimal output using the
-// `Hex` type contained here. To do so, pass `Hex(my_int)` as a parameter to
-// `StrCat()` or `StrAppend()`. You may specify a minimum hex field width using
-// a `PadSpec` enum.
-//
-// -----------------------------------------------------------------------------
-
-#ifndef ABSL_STRINGS_STR_CAT_H_
-#define ABSL_STRINGS_STR_CAT_H_
-
-#include <array>
-#include <cstdint>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/port.h"
-#include "absl/strings/numbers.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace strings_internal {
-// AlphaNumBuffer allows a way to pass a string to StrCat without having to do
-// memory allocation.  It is simply a pair of a fixed-size character array, and
-// a size.  Please don't use outside of absl, yet.
-template <size_t max_size>
-struct AlphaNumBuffer {
-  std::array<char, max_size> data;
-  size_t size;
-};
-
-}  // namespace strings_internal
-
-// Enum that specifies the number of significant digits to return in a `Hex` or
-// `Dec` conversion and fill character to use. A `kZeroPad2` value, for example,
-// would produce hexadecimal strings such as "0a","0f" and a 'kSpacePad5' value
-// would produce hexadecimal strings such as "    a","    f".
-enum PadSpec : uint8_t {
-  kNoPad = 1,
-  kZeroPad2,
-  kZeroPad3,
-  kZeroPad4,
-  kZeroPad5,
-  kZeroPad6,
-  kZeroPad7,
-  kZeroPad8,
-  kZeroPad9,
-  kZeroPad10,
-  kZeroPad11,
-  kZeroPad12,
-  kZeroPad13,
-  kZeroPad14,
-  kZeroPad15,
-  kZeroPad16,
-  kZeroPad17,
-  kZeroPad18,
-  kZeroPad19,
-  kZeroPad20,
-
-  kSpacePad2 = kZeroPad2 + 64,
-  kSpacePad3,
-  kSpacePad4,
-  kSpacePad5,
-  kSpacePad6,
-  kSpacePad7,
-  kSpacePad8,
-  kSpacePad9,
-  kSpacePad10,
-  kSpacePad11,
-  kSpacePad12,
-  kSpacePad13,
-  kSpacePad14,
-  kSpacePad15,
-  kSpacePad16,
-  kSpacePad17,
-  kSpacePad18,
-  kSpacePad19,
-  kSpacePad20,
-};
-
-// -----------------------------------------------------------------------------
-// Hex
-// -----------------------------------------------------------------------------
-//
-// `Hex` stores a set of hexadecimal string conversion parameters for use
-// within `AlphaNum` string conversions.
-struct Hex {
-  uint64_t value;
-  uint8_t width;
-  char fill;
-
-  template <typename Int>
-  explicit Hex(
-      Int v, PadSpec spec = absl::kNoPad,
-      typename std::enable_if<sizeof(Int) == 1 &&
-                              !std::is_pointer<Int>::value>::type* = nullptr)
-      : Hex(spec, static_cast<uint8_t>(v)) {}
-  template <typename Int>
-  explicit Hex(
-      Int v, PadSpec spec = absl::kNoPad,
-      typename std::enable_if<sizeof(Int) == 2 &&
-                              !std::is_pointer<Int>::value>::type* = nullptr)
-      : Hex(spec, static_cast<uint16_t>(v)) {}
-  template <typename Int>
-  explicit Hex(
-      Int v, PadSpec spec = absl::kNoPad,
-      typename std::enable_if<sizeof(Int) == 4 &&
-                              !std::is_pointer<Int>::value>::type* = nullptr)
-      : Hex(spec, static_cast<uint32_t>(v)) {}
-  template <typename Int>
-  explicit Hex(
-      Int v, PadSpec spec = absl::kNoPad,
-      typename std::enable_if<sizeof(Int) == 8 &&
-                              !std::is_pointer<Int>::value>::type* = nullptr)
-      : Hex(spec, static_cast<uint64_t>(v)) {}
-  template <typename Pointee>
-  explicit Hex(Pointee* v, PadSpec spec = absl::kNoPad)
-      : Hex(spec, reinterpret_cast<uintptr_t>(v)) {}
-
- private:
-  Hex(PadSpec spec, uint64_t v)
-      : value(v),
-        width(spec == absl::kNoPad
-                  ? 1
-                  : spec >= absl::kSpacePad2 ? spec - absl::kSpacePad2 + 2
-                                             : spec - absl::kZeroPad2 + 2),
-        fill(spec >= absl::kSpacePad2 ? ' ' : '0') {}
-};
-
-// -----------------------------------------------------------------------------
-// Dec
-// -----------------------------------------------------------------------------
-//
-// `Dec` stores a set of decimal string conversion parameters for use
-// within `AlphaNum` string conversions.  Dec is slower than the default
-// integer conversion, so use it only if you need padding.
-struct Dec {
-  uint64_t value;
-  uint8_t width;
-  char fill;
-  bool neg;
-
-  template <typename Int>
-  explicit Dec(Int v, PadSpec spec = absl::kNoPad,
-               typename std::enable_if<(sizeof(Int) <= 8)>::type* = nullptr)
-      : value(v >= 0 ? static_cast<uint64_t>(v)
-                     : uint64_t{0} - static_cast<uint64_t>(v)),
-        width(spec == absl::kNoPad
-                  ? 1
-                  : spec >= absl::kSpacePad2 ? spec - absl::kSpacePad2 + 2
-                                             : spec - absl::kZeroPad2 + 2),
-        fill(spec >= absl::kSpacePad2 ? ' ' : '0'),
-        neg(v < 0) {}
-};
-
-// -----------------------------------------------------------------------------
-// AlphaNum
-// -----------------------------------------------------------------------------
-//
-// The `AlphaNum` class acts as the main parameter type for `StrCat()` and
-// `StrAppend()`, providing efficient conversion of numeric, boolean, and
-// hexadecimal values (through the `Hex` type) into strings.
-
-class AlphaNum {
- public:
-  // No bool ctor -- bools convert to an integral type.
-  // A bool ctor would also convert incoming pointers (bletch).
-
-  AlphaNum(int x)  // NOLINT(runtime/explicit)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
-  AlphaNum(unsigned int x)  // NOLINT(runtime/explicit)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
-  AlphaNum(long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
-  AlphaNum(unsigned long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
-  AlphaNum(long long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
-  AlphaNum(unsigned long long x)  // NOLINT(*)
-      : piece_(digits_,
-               numbers_internal::FastIntToBuffer(x, digits_) - &digits_[0]) {}
-
-  AlphaNum(float f)  // NOLINT(runtime/explicit)
-      : piece_(digits_, numbers_internal::SixDigitsToBuffer(f, digits_)) {}
-  AlphaNum(double f)  // NOLINT(runtime/explicit)
-      : piece_(digits_, numbers_internal::SixDigitsToBuffer(f, digits_)) {}
-
-  AlphaNum(Hex hex);  // NOLINT(runtime/explicit)
-  AlphaNum(Dec dec);  // NOLINT(runtime/explicit)
-
-  template <size_t size>
-  AlphaNum(  // NOLINT(runtime/explicit)
-      const strings_internal::AlphaNumBuffer<size>& buf)
-      : piece_(&buf.data[0], buf.size) {}
-
-  AlphaNum(const char* c_str) : piece_(c_str) {}  // NOLINT(runtime/explicit)
-  AlphaNum(absl::string_view pc) : piece_(pc) {}  // NOLINT(runtime/explicit)
-
-  template <typename Allocator>
-  AlphaNum(  // NOLINT(runtime/explicit)
-      const std::basic_string<char, std::char_traits<char>, Allocator>& str)
-      : piece_(str) {}
-
-  // Use string literals ":" instead of character literals ':'.
-  AlphaNum(char c) = delete;  // NOLINT(runtime/explicit)
-
-  AlphaNum(const AlphaNum&) = delete;
-  AlphaNum& operator=(const AlphaNum&) = delete;
-
-  absl::string_view::size_type size() const { return piece_.size(); }
-  const char* data() const { return piece_.data(); }
-  absl::string_view Piece() const { return piece_; }
-
-  // Normal enums are already handled by the integer formatters.
-  // This overload matches only scoped enums.
-  template <typename T,
-            typename = typename std::enable_if<
-                std::is_enum<T>{} && !std::is_convertible<T, int>{}>::type>
-  AlphaNum(T e)  // NOLINT(runtime/explicit)
-      : AlphaNum(static_cast<typename std::underlying_type<T>::type>(e)) {}
-
-  // vector<bool>::reference and const_reference require special help to
-  // convert to `AlphaNum` because it requires two user defined conversions.
-  template <
-      typename T,
-      typename std::enable_if<
-          std::is_class<T>::value &&
-          (std::is_same<T, std::vector<bool>::reference>::value ||
-           std::is_same<T, std::vector<bool>::const_reference>::value)>::type* =
-          nullptr>
-  AlphaNum(T e) : AlphaNum(static_cast<bool>(e)) {}  // NOLINT(runtime/explicit)
-
- private:
-  absl::string_view piece_;
-  char digits_[numbers_internal::kFastToBufferSize];
-};
-
-// -----------------------------------------------------------------------------
-// StrCat()
-// -----------------------------------------------------------------------------
-//
-// Merges given strings or numbers, using no delimiter(s), returning the merged
-// result as a string.
-//
-// `StrCat()` is designed to be the fastest possible way to construct a string
-// out of a mix of raw C strings, string_views, strings, bool values,
-// and numeric values.
-//
-// Don't use `StrCat()` for user-visible strings. The localization process
-// works poorly on strings built up out of fragments.
-//
-// For clarity and performance, don't use `StrCat()` when appending to a
-// string. Use `StrAppend()` instead. In particular, avoid using any of these
-// (anti-)patterns:
-//
-//   str.append(StrCat(...))
-//   str += StrCat(...)
-//   str = StrCat(str, ...)
-//
-// The last case is the worst, with a potential to change a loop
-// from a linear time operation with O(1) dynamic allocations into a
-// quadratic time operation with O(n) dynamic allocations.
-//
-// See `StrAppend()` below for more information.
-
-namespace strings_internal {
-
-// Do not call directly - this is not part of the public API.
-std::string CatPieces(std::initializer_list<absl::string_view> pieces);
-void AppendPieces(std::string* dest,
-                  std::initializer_list<absl::string_view> pieces);
-
-}  // namespace strings_internal
-
-ABSL_MUST_USE_RESULT inline std::string StrCat() { return std::string(); }
-
-ABSL_MUST_USE_RESULT inline std::string StrCat(const AlphaNum& a) {
-  return std::string(a.data(), a.size());
-}
-
-ABSL_MUST_USE_RESULT std::string StrCat(const AlphaNum& a, const AlphaNum& b);
-ABSL_MUST_USE_RESULT std::string StrCat(const AlphaNum& a, const AlphaNum& b,
-                                        const AlphaNum& c);
-ABSL_MUST_USE_RESULT std::string StrCat(const AlphaNum& a, const AlphaNum& b,
-                                        const AlphaNum& c, const AlphaNum& d);
-
-// Support 5 or more arguments
-template <typename... AV>
-ABSL_MUST_USE_RESULT inline std::string StrCat(
-    const AlphaNum& a, const AlphaNum& b, const AlphaNum& c, const AlphaNum& d,
-    const AlphaNum& e, const AV&... args) {
-  return strings_internal::CatPieces(
-      {a.Piece(), b.Piece(), c.Piece(), d.Piece(), e.Piece(),
-       static_cast<const AlphaNum&>(args).Piece()...});
-}
-
-// -----------------------------------------------------------------------------
-// StrAppend()
-// -----------------------------------------------------------------------------
-//
-// Appends a string or set of strings to an existing string, in a similar
-// fashion to `StrCat()`.
-//
-// WARNING: `StrAppend(&str, a, b, c, ...)` requires that none of the
-// a, b, c, parameters be a reference into str. For speed, `StrAppend()` does
-// not try to check each of its input arguments to be sure that they are not
-// a subset of the string being appended to. That is, while this will work:
-//
-//   std::string s = "foo";
-//   s += s;
-//
-// This output is undefined:
-//
-//   std::string s = "foo";
-//   StrAppend(&s, s);
-//
-// This output is undefined as well, since `absl::string_view` does not own its
-// data:
-//
-//   std::string s = "foobar";
-//   absl::string_view p = s;
-//   StrAppend(&s, p);
-
-inline void StrAppend(std::string*) {}
-void StrAppend(std::string* dest, const AlphaNum& a);
-void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b);
-void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b,
-               const AlphaNum& c);
-void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b,
-               const AlphaNum& c, const AlphaNum& d);
-
-// Support 5 or more arguments
-template <typename... AV>
-inline void StrAppend(std::string* dest, const AlphaNum& a, const AlphaNum& b,
-                      const AlphaNum& c, const AlphaNum& d, const AlphaNum& e,
-                      const AV&... args) {
-  strings_internal::AppendPieces(
-      dest, {a.Piece(), b.Piece(), c.Piece(), d.Piece(), e.Piece(),
-             static_cast<const AlphaNum&>(args).Piece()...});
-}
-
-// Helper function for the future StrCat default floating-point format, %.6g
-// This is fast.
-inline strings_internal::AlphaNumBuffer<
-    numbers_internal::kSixDigitsToBufferSize>
-SixDigits(double d) {
-  strings_internal::AlphaNumBuffer<numbers_internal::kSixDigitsToBufferSize>
-      result;
-  result.size = numbers_internal::SixDigitsToBuffer(d, &result.data[0]);
-  return result;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STR_CAT_H_
diff --git a/third_party/abseil/absl/strings/str_cat_benchmark.cc b/third_party/abseil/absl/strings/str_cat_benchmark.cc
deleted file mode 100644
index 02c4dbe..0000000
--- a/third_party/abseil/absl/strings/str_cat_benchmark.cc
+++ /dev/null
@@ -1,187 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_cat.h"
-
-#include <cstdint>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "absl/strings/substitute.h"
-
-namespace {
-
-const char kStringOne[] = "Once Upon A Time, ";
-const char kStringTwo[] = "There was a string benchmark";
-
-// We want to include negative numbers in the benchmark, so this function
-// is used to count 0, 1, -1, 2, -2, 3, -3, ...
-inline int IncrementAlternatingSign(int i) {
-  return i > 0 ? -i : 1 - i;
-}
-
-void BM_Sum_By_StrCat(benchmark::State& state) {
-  int i = 0;
-  char foo[100];
-  for (auto _ : state) {
-    // NOLINTNEXTLINE(runtime/printf)
-    strcpy(foo, absl::StrCat(kStringOne, i, kStringTwo, i * 65536ULL).c_str());
-    int sum = 0;
-    for (char* f = &foo[0]; *f != 0; ++f) {
-      sum += *f;
-    }
-    benchmark::DoNotOptimize(sum);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_Sum_By_StrCat);
-
-void BM_StrCat_By_snprintf(benchmark::State& state) {
-  int i = 0;
-  char on_stack[1000];
-  for (auto _ : state) {
-    snprintf(on_stack, sizeof(on_stack), "%s %s:%d", kStringOne, kStringTwo, i);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_StrCat_By_snprintf);
-
-void BM_StrCat_By_Strings(benchmark::State& state) {
-  int i = 0;
-  for (auto _ : state) {
-    std::string result =
-        std::string(kStringOne) + " " + kStringTwo + ":" + absl::StrCat(i);
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_StrCat_By_Strings);
-
-void BM_StrCat_By_StringOpPlus(benchmark::State& state) {
-  int i = 0;
-  for (auto _ : state) {
-    std::string result = kStringOne;
-    result += " ";
-    result += kStringTwo;
-    result += ":";
-    result += absl::StrCat(i);
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_StrCat_By_StringOpPlus);
-
-void BM_StrCat_By_StrCat(benchmark::State& state) {
-  int i = 0;
-  for (auto _ : state) {
-    std::string result = absl::StrCat(kStringOne, " ", kStringTwo, ":", i);
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_StrCat_By_StrCat);
-
-void BM_HexCat_By_StrCat(benchmark::State& state) {
-  int i = 0;
-  for (auto _ : state) {
-    std::string result =
-        absl::StrCat(kStringOne, " ", absl::Hex(int64_t{i} + 0x10000000));
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_HexCat_By_StrCat);
-
-void BM_HexCat_By_Substitute(benchmark::State& state) {
-  int i = 0;
-  for (auto _ : state) {
-    std::string result = absl::Substitute(
-        "$0 $1", kStringOne, reinterpret_cast<void*>(int64_t{i} + 0x10000000));
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_HexCat_By_Substitute);
-
-void BM_FloatToString_By_StrCat(benchmark::State& state) {
-  int i = 0;
-  float foo = 0.0f;
-  for (auto _ : state) {
-    std::string result = absl::StrCat(foo += 1.001f, " != ", int64_t{i});
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_FloatToString_By_StrCat);
-
-void BM_DoubleToString_By_SixDigits(benchmark::State& state) {
-  int i = 0;
-  double foo = 0.0;
-  for (auto _ : state) {
-    std::string result =
-        absl::StrCat(absl::SixDigits(foo += 1.001), " != ", int64_t{i});
-    benchmark::DoNotOptimize(result);
-    i = IncrementAlternatingSign(i);
-  }
-}
-BENCHMARK(BM_DoubleToString_By_SixDigits);
-
-template <typename... Chunks>
-void BM_StrAppendImpl(benchmark::State& state, size_t total_bytes,
-                      Chunks... chunks) {
-  for (auto s : state) {
-    std::string result;
-    while (result.size() < total_bytes) {
-      absl::StrAppend(&result, chunks...);
-      benchmark::DoNotOptimize(result);
-    }
-  }
-}
-
-void BM_StrAppend(benchmark::State& state) {
-  const int total_bytes = state.range(0);
-  const int chunks_at_a_time = state.range(1);
-  const absl::string_view kChunk = "0123456789";
-
-  switch (chunks_at_a_time) {
-    case 1:
-      return BM_StrAppendImpl(state, total_bytes, kChunk);
-    case 2:
-      return BM_StrAppendImpl(state, total_bytes, kChunk, kChunk);
-    case 4:
-      return BM_StrAppendImpl(state, total_bytes, kChunk, kChunk, kChunk,
-                              kChunk);
-    case 8:
-      return BM_StrAppendImpl(state, total_bytes, kChunk, kChunk, kChunk,
-                              kChunk, kChunk, kChunk, kChunk, kChunk);
-    default:
-      std::abort();
-  }
-}
-
-template <typename B>
-void StrAppendConfig(B* benchmark) {
-  for (int bytes : {10, 100, 1000, 10000}) {
-    for (int chunks : {1, 2, 4, 8}) {
-      // Only add the ones that divide properly. Otherwise we are over counting.
-      if (bytes % (10 * chunks) == 0) {
-        benchmark->Args({bytes, chunks});
-      }
-    }
-  }
-}
-
-BENCHMARK(BM_StrAppend)->Apply(StrAppendConfig);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_cat_test.cc b/third_party/abseil/absl/strings/str_cat_test.cc
deleted file mode 100644
index f3770dc..0000000
--- a/third_party/abseil/absl/strings/str_cat_test.cc
+++ /dev/null
@@ -1,610 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Unit tests for all str_cat.h functions
-
-#include "absl/strings/str_cat.h"
-
-#include <cstdint>
-#include <string>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/strings/substitute.h"
-
-#ifdef __ANDROID__
-// Android assert messages only go to system log, so death tests cannot inspect
-// the message for matching.
-#define ABSL_EXPECT_DEBUG_DEATH(statement, regex) \
-  EXPECT_DEBUG_DEATH(statement, ".*")
-#else
-#define ABSL_EXPECT_DEBUG_DEATH(statement, regex) \
-  EXPECT_DEBUG_DEATH(statement, regex)
-#endif
-
-namespace {
-
-// Test absl::StrCat of ints and longs of various sizes and signdedness.
-TEST(StrCat, Ints) {
-  const short s = -1;  // NOLINT(runtime/int)
-  const uint16_t us = 2;
-  const int i = -3;
-  const unsigned int ui = 4;
-  const long l = -5;                 // NOLINT(runtime/int)
-  const unsigned long ul = 6;        // NOLINT(runtime/int)
-  const long long ll = -7;           // NOLINT(runtime/int)
-  const unsigned long long ull = 8;  // NOLINT(runtime/int)
-  const ptrdiff_t ptrdiff = -9;
-  const size_t size = 10;
-  const intptr_t intptr = -12;
-  const uintptr_t uintptr = 13;
-  std::string answer;
-  answer = absl::StrCat(s, us);
-  EXPECT_EQ(answer, "-12");
-  answer = absl::StrCat(i, ui);
-  EXPECT_EQ(answer, "-34");
-  answer = absl::StrCat(l, ul);
-  EXPECT_EQ(answer, "-56");
-  answer = absl::StrCat(ll, ull);
-  EXPECT_EQ(answer, "-78");
-  answer = absl::StrCat(ptrdiff, size);
-  EXPECT_EQ(answer, "-910");
-  answer = absl::StrCat(ptrdiff, intptr);
-  EXPECT_EQ(answer, "-9-12");
-  answer = absl::StrCat(uintptr, 0);
-  EXPECT_EQ(answer, "130");
-}
-
-TEST(StrCat, Enums) {
-  enum SmallNumbers { One = 1, Ten = 10 } e = Ten;
-  EXPECT_EQ("10", absl::StrCat(e));
-  EXPECT_EQ("-5", absl::StrCat(SmallNumbers(-5)));
-
-  enum class Option { Boxers = 1, Briefs = -1 };
-
-  EXPECT_EQ("-1", absl::StrCat(Option::Briefs));
-
-  enum class Airplane : uint64_t {
-    Airbus = 1,
-    Boeing = 1000,
-    Canary = 10000000000  // too big for "int"
-  };
-
-  EXPECT_EQ("10000000000", absl::StrCat(Airplane::Canary));
-
-  enum class TwoGig : int32_t {
-    TwoToTheZero = 1,
-    TwoToTheSixteenth = 1 << 16,
-    TwoToTheThirtyFirst = INT32_MIN
-  };
-  EXPECT_EQ("65536", absl::StrCat(TwoGig::TwoToTheSixteenth));
-  EXPECT_EQ("-2147483648", absl::StrCat(TwoGig::TwoToTheThirtyFirst));
-  EXPECT_EQ("-1", absl::StrCat(static_cast<TwoGig>(-1)));
-
-  enum class FourGig : uint32_t {
-    TwoToTheZero = 1,
-    TwoToTheSixteenth = 1 << 16,
-    TwoToTheThirtyFirst = 1U << 31  // too big for "int"
-  };
-  EXPECT_EQ("65536", absl::StrCat(FourGig::TwoToTheSixteenth));
-  EXPECT_EQ("2147483648", absl::StrCat(FourGig::TwoToTheThirtyFirst));
-  EXPECT_EQ("4294967295", absl::StrCat(static_cast<FourGig>(-1)));
-
-  EXPECT_EQ("10000000000", absl::StrCat(Airplane::Canary));
-}
-
-TEST(StrCat, Basics) {
-  std::string result;
-
-  std::string strs[] = {"Hello", "Cruel", "World"};
-
-  std::string stdstrs[] = {
-    "std::Hello",
-    "std::Cruel",
-    "std::World"
-  };
-
-  absl::string_view pieces[] = {"Hello", "Cruel", "World"};
-
-  const char* c_strs[] = {
-    "Hello",
-    "Cruel",
-    "World"
-  };
-
-  int32_t i32s[] = {'H', 'C', 'W'};
-  uint64_t ui64s[] = {12345678910LL, 10987654321LL};
-
-  EXPECT_EQ(absl::StrCat(), "");
-
-  result = absl::StrCat(false, true, 2, 3);
-  EXPECT_EQ(result, "0123");
-
-  result = absl::StrCat(-1);
-  EXPECT_EQ(result, "-1");
-
-  result = absl::StrCat(absl::SixDigits(0.5));
-  EXPECT_EQ(result, "0.5");
-
-  result = absl::StrCat(strs[1], pieces[2]);
-  EXPECT_EQ(result, "CruelWorld");
-
-  result = absl::StrCat(stdstrs[1], " ", stdstrs[2]);
-  EXPECT_EQ(result, "std::Cruel std::World");
-
-  result = absl::StrCat(strs[0], ", ", pieces[2]);
-  EXPECT_EQ(result, "Hello, World");
-
-  result = absl::StrCat(strs[0], ", ", strs[1], " ", strs[2], "!");
-  EXPECT_EQ(result, "Hello, Cruel World!");
-
-  result = absl::StrCat(pieces[0], ", ", pieces[1], " ", pieces[2]);
-  EXPECT_EQ(result, "Hello, Cruel World");
-
-  result = absl::StrCat(c_strs[0], ", ", c_strs[1], " ", c_strs[2]);
-  EXPECT_EQ(result, "Hello, Cruel World");
-
-  result = absl::StrCat("ASCII ", i32s[0], ", ", i32s[1], " ", i32s[2], "!");
-  EXPECT_EQ(result, "ASCII 72, 67 87!");
-
-  result = absl::StrCat(ui64s[0], ", ", ui64s[1], "!");
-  EXPECT_EQ(result, "12345678910, 10987654321!");
-
-  std::string one =
-      "1";  // Actually, it's the size of this string that we want; a
-            // 64-bit build distinguishes between size_t and uint64_t,
-            // even though they're both unsigned 64-bit values.
-  result = absl::StrCat("And a ", one.size(), " and a ",
-                        &result[2] - &result[0], " and a ", one, " 2 3 4", "!");
-  EXPECT_EQ(result, "And a 1 and a 2 and a 1 2 3 4!");
-
-  // result = absl::StrCat("Single chars won't compile", '!');
-  // result = absl::StrCat("Neither will nullptrs", nullptr);
-  result =
-      absl::StrCat("To output a char by ASCII/numeric value, use +: ", '!' + 0);
-  EXPECT_EQ(result, "To output a char by ASCII/numeric value, use +: 33");
-
-  float f = 100000.5;
-  result = absl::StrCat("A hundred K and a half is ", absl::SixDigits(f));
-  EXPECT_EQ(result, "A hundred K and a half is 100000");
-
-  f = 100001.5;
-  result =
-      absl::StrCat("A hundred K and one and a half is ", absl::SixDigits(f));
-  EXPECT_EQ(result, "A hundred K and one and a half is 100002");
-
-  double d = 100000.5;
-  d *= d;
-  result =
-      absl::StrCat("A hundred K and a half squared is ", absl::SixDigits(d));
-  EXPECT_EQ(result, "A hundred K and a half squared is 1.00001e+10");
-
-  result = absl::StrCat(1, 2, 333, 4444, 55555, 666666, 7777777, 88888888,
-                        999999999);
-  EXPECT_EQ(result, "12333444455555666666777777788888888999999999");
-}
-
-TEST(StrCat, CornerCases) {
-  std::string result;
-
-  result = absl::StrCat("");  // NOLINT
-  EXPECT_EQ(result, "");
-  result = absl::StrCat("", "");
-  EXPECT_EQ(result, "");
-  result = absl::StrCat("", "", "");
-  EXPECT_EQ(result, "");
-  result = absl::StrCat("", "", "", "");
-  EXPECT_EQ(result, "");
-  result = absl::StrCat("", "", "", "", "");
-  EXPECT_EQ(result, "");
-}
-
-// A minimal allocator that uses malloc().
-template <typename T>
-struct Mallocator {
-  typedef T value_type;
-  typedef size_t size_type;
-  typedef ptrdiff_t difference_type;
-  typedef T* pointer;
-  typedef const T* const_pointer;
-  typedef T& reference;
-  typedef const T& const_reference;
-
-  size_type max_size() const {
-    return size_t(std::numeric_limits<size_type>::max()) / sizeof(value_type);
-  }
-  template <typename U>
-  struct rebind {
-    typedef Mallocator<U> other;
-  };
-  Mallocator() = default;
-  template <class U>
-  Mallocator(const Mallocator<U>&) {}  // NOLINT(runtime/explicit)
-
-  T* allocate(size_t n) { return static_cast<T*>(std::malloc(n * sizeof(T))); }
-  void deallocate(T* p, size_t) { std::free(p); }
-};
-template <typename T, typename U>
-bool operator==(const Mallocator<T>&, const Mallocator<U>&) {
-  return true;
-}
-template <typename T, typename U>
-bool operator!=(const Mallocator<T>&, const Mallocator<U>&) {
-  return false;
-}
-
-TEST(StrCat, CustomAllocator) {
-  using mstring =
-      std::basic_string<char, std::char_traits<char>, Mallocator<char>>;
-  const mstring str1("PARACHUTE OFF A BLIMP INTO MOSCONE!!");
-
-  const mstring str2("Read this book about coffee tables");
-
-  std::string result = absl::StrCat(str1, str2);
-  EXPECT_EQ(result,
-            "PARACHUTE OFF A BLIMP INTO MOSCONE!!"
-            "Read this book about coffee tables");
-}
-
-TEST(StrCat, MaxArgs) {
-  std::string result;
-  // Test 10 up to 26 arguments, the old maximum
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a");
-  EXPECT_EQ(result, "123456789a");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b");
-  EXPECT_EQ(result, "123456789ab");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c");
-  EXPECT_EQ(result, "123456789abc");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d");
-  EXPECT_EQ(result, "123456789abcd");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e");
-  EXPECT_EQ(result, "123456789abcde");
-  result =
-      absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f");
-  EXPECT_EQ(result, "123456789abcdef");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g");
-  EXPECT_EQ(result, "123456789abcdefg");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h");
-  EXPECT_EQ(result, "123456789abcdefgh");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i");
-  EXPECT_EQ(result, "123456789abcdefghi");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j");
-  EXPECT_EQ(result, "123456789abcdefghij");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k");
-  EXPECT_EQ(result, "123456789abcdefghijk");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l");
-  EXPECT_EQ(result, "123456789abcdefghijkl");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m");
-  EXPECT_EQ(result, "123456789abcdefghijklm");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n");
-  EXPECT_EQ(result, "123456789abcdefghijklmn");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n", "o");
-  EXPECT_EQ(result, "123456789abcdefghijklmno");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n", "o", "p");
-  EXPECT_EQ(result, "123456789abcdefghijklmnop");
-  result = absl::StrCat(1, 2, 3, 4, 5, 6, 7, 8, 9, "a", "b", "c", "d", "e", "f",
-                        "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q");
-  EXPECT_EQ(result, "123456789abcdefghijklmnopq");
-  // No limit thanks to C++11's variadic templates
-  result = absl::StrCat(
-      1, 2, 3, 4, 5, 6, 7, 8, 9, 10, "a", "b", "c", "d", "e", "f", "g", "h",
-      "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w",
-      "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L",
-      "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");
-  EXPECT_EQ(result,
-            "12345678910abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
-}
-
-TEST(StrAppend, Basics) {
-  std::string result = "existing text";
-
-  std::string strs[] = {"Hello", "Cruel", "World"};
-
-  std::string stdstrs[] = {
-    "std::Hello",
-    "std::Cruel",
-    "std::World"
-  };
-
-  absl::string_view pieces[] = {"Hello", "Cruel", "World"};
-
-  const char* c_strs[] = {
-    "Hello",
-    "Cruel",
-    "World"
-  };
-
-  int32_t i32s[] = {'H', 'C', 'W'};
-  uint64_t ui64s[] = {12345678910LL, 10987654321LL};
-
-  std::string::size_type old_size = result.size();
-  absl::StrAppend(&result);
-  EXPECT_EQ(result.size(), old_size);
-
-  old_size = result.size();
-  absl::StrAppend(&result, strs[0]);
-  EXPECT_EQ(result.substr(old_size), "Hello");
-
-  old_size = result.size();
-  absl::StrAppend(&result, strs[1], pieces[2]);
-  EXPECT_EQ(result.substr(old_size), "CruelWorld");
-
-  old_size = result.size();
-  absl::StrAppend(&result, stdstrs[0], ", ", pieces[2]);
-  EXPECT_EQ(result.substr(old_size), "std::Hello, World");
-
-  old_size = result.size();
-  absl::StrAppend(&result, strs[0], ", ", stdstrs[1], " ", strs[2], "!");
-  EXPECT_EQ(result.substr(old_size), "Hello, std::Cruel World!");
-
-  old_size = result.size();
-  absl::StrAppend(&result, pieces[0], ", ", pieces[1], " ", pieces[2]);
-  EXPECT_EQ(result.substr(old_size), "Hello, Cruel World");
-
-  old_size = result.size();
-  absl::StrAppend(&result, c_strs[0], ", ", c_strs[1], " ", c_strs[2]);
-  EXPECT_EQ(result.substr(old_size), "Hello, Cruel World");
-
-  old_size = result.size();
-  absl::StrAppend(&result, "ASCII ", i32s[0], ", ", i32s[1], " ", i32s[2], "!");
-  EXPECT_EQ(result.substr(old_size), "ASCII 72, 67 87!");
-
-  old_size = result.size();
-  absl::StrAppend(&result, ui64s[0], ", ", ui64s[1], "!");
-  EXPECT_EQ(result.substr(old_size), "12345678910, 10987654321!");
-
-  std::string one =
-      "1";  // Actually, it's the size of this string that we want; a
-            // 64-bit build distinguishes between size_t and uint64_t,
-            // even though they're both unsigned 64-bit values.
-  old_size = result.size();
-  absl::StrAppend(&result, "And a ", one.size(), " and a ",
-                  &result[2] - &result[0], " and a ", one, " 2 3 4", "!");
-  EXPECT_EQ(result.substr(old_size), "And a 1 and a 2 and a 1 2 3 4!");
-
-  // result = absl::StrCat("Single chars won't compile", '!');
-  // result = absl::StrCat("Neither will nullptrs", nullptr);
-  old_size = result.size();
-  absl::StrAppend(&result,
-                  "To output a char by ASCII/numeric value, use +: ", '!' + 0);
-  EXPECT_EQ(result.substr(old_size),
-            "To output a char by ASCII/numeric value, use +: 33");
-
-  // Test 9 arguments, the old maximum
-  old_size = result.size();
-  absl::StrAppend(&result, 1, 22, 333, 4444, 55555, 666666, 7777777, 88888888,
-                  9);
-  EXPECT_EQ(result.substr(old_size), "1223334444555556666667777777888888889");
-
-  // No limit thanks to C++11's variadic templates
-  old_size = result.size();
-  absl::StrAppend(
-      &result, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,                           //
-      "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",  //
-      "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",  //
-      "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",  //
-      "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",  //
-      "No limit thanks to C++11's variadic templates");
-  EXPECT_EQ(result.substr(old_size),
-            "12345678910abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
-            "No limit thanks to C++11's variadic templates");
-}
-
-TEST(StrCat, VectorBoolReferenceTypes) {
-  std::vector<bool> v;
-  v.push_back(true);
-  v.push_back(false);
-  std::vector<bool> const& cv = v;
-  // Test that vector<bool>::reference and vector<bool>::const_reference
-  // are handled as if the were really bool types and not the proxy types
-  // they really are.
-  std::string result = absl::StrCat(v[0], v[1], cv[0], cv[1]); // NOLINT
-  EXPECT_EQ(result, "1010");
-}
-
-// Passing nullptr to memcpy is undefined behavior and this test
-// provides coverage of codepaths that handle empty strings with nullptrs.
-TEST(StrCat, AvoidsMemcpyWithNullptr) {
-  EXPECT_EQ(absl::StrCat(42, absl::string_view{}), "42");
-
-  // Cover CatPieces code.
-  EXPECT_EQ(absl::StrCat(1, 2, 3, 4, 5, absl::string_view{}), "12345");
-
-  // Cover AppendPieces.
-  std::string result;
-  absl::StrAppend(&result, 1, 2, 3, 4, 5, absl::string_view{});
-  EXPECT_EQ(result, "12345");
-}
-
-#ifdef GTEST_HAS_DEATH_TEST
-TEST(StrAppend, Death) {
-  std::string s = "self";
-  // on linux it's "assertion", on mac it's "Assertion",
-  // on chromiumos it's "Assertion ... failed".
-  ABSL_EXPECT_DEBUG_DEATH(absl::StrAppend(&s, s.c_str() + 1),
-                          "ssertion.*failed");
-  ABSL_EXPECT_DEBUG_DEATH(absl::StrAppend(&s, s), "ssertion.*failed");
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-TEST(StrAppend, CornerCases) {
-  std::string result;
-  absl::StrAppend(&result, "");
-  EXPECT_EQ(result, "");
-  absl::StrAppend(&result, "", "");
-  EXPECT_EQ(result, "");
-  absl::StrAppend(&result, "", "", "");
-  EXPECT_EQ(result, "");
-  absl::StrAppend(&result, "", "", "", "");
-  EXPECT_EQ(result, "");
-  absl::StrAppend(&result, "", "", "", "", "");
-  EXPECT_EQ(result, "");
-}
-
-TEST(StrAppend, CornerCasesNonEmptyAppend) {
-  for (std::string result : {"hello", "a string too long to fit in the SSO"}) {
-    const std::string expected = result;
-    absl::StrAppend(&result, "");
-    EXPECT_EQ(result, expected);
-    absl::StrAppend(&result, "", "");
-    EXPECT_EQ(result, expected);
-    absl::StrAppend(&result, "", "", "");
-    EXPECT_EQ(result, expected);
-    absl::StrAppend(&result, "", "", "", "");
-    EXPECT_EQ(result, expected);
-    absl::StrAppend(&result, "", "", "", "", "");
-    EXPECT_EQ(result, expected);
-  }
-}
-
-template <typename IntType>
-void CheckHex(IntType v, const char* nopad_format, const char* zeropad_format,
-              const char* spacepad_format) {
-  char expected[256];
-
-  std::string actual = absl::StrCat(absl::Hex(v, absl::kNoPad));
-  snprintf(expected, sizeof(expected), nopad_format, v);
-  EXPECT_EQ(expected, actual) << " decimal value " << v;
-
-  for (int spec = absl::kZeroPad2; spec <= absl::kZeroPad20; ++spec) {
-    std::string actual =
-        absl::StrCat(absl::Hex(v, static_cast<absl::PadSpec>(spec)));
-    snprintf(expected, sizeof(expected), zeropad_format,
-             spec - absl::kZeroPad2 + 2, v);
-    EXPECT_EQ(expected, actual) << " decimal value " << v;
-  }
-
-  for (int spec = absl::kSpacePad2; spec <= absl::kSpacePad20; ++spec) {
-    std::string actual =
-        absl::StrCat(absl::Hex(v, static_cast<absl::PadSpec>(spec)));
-    snprintf(expected, sizeof(expected), spacepad_format,
-             spec - absl::kSpacePad2 + 2, v);
-    EXPECT_EQ(expected, actual) << " decimal value " << v;
-  }
-}
-
-template <typename IntType>
-void CheckDec(IntType v, const char* nopad_format, const char* zeropad_format,
-              const char* spacepad_format) {
-  char expected[256];
-
-  std::string actual = absl::StrCat(absl::Dec(v, absl::kNoPad));
-  snprintf(expected, sizeof(expected), nopad_format, v);
-  EXPECT_EQ(expected, actual) << " decimal value " << v;
-
-  for (int spec = absl::kZeroPad2; spec <= absl::kZeroPad20; ++spec) {
-    std::string actual =
-        absl::StrCat(absl::Dec(v, static_cast<absl::PadSpec>(spec)));
-    snprintf(expected, sizeof(expected), zeropad_format,
-             spec - absl::kZeroPad2 + 2, v);
-    EXPECT_EQ(expected, actual)
-        << " decimal value " << v << " format '" << zeropad_format
-        << "' digits " << (spec - absl::kZeroPad2 + 2);
-  }
-
-  for (int spec = absl::kSpacePad2; spec <= absl::kSpacePad20; ++spec) {
-    std::string actual =
-        absl::StrCat(absl::Dec(v, static_cast<absl::PadSpec>(spec)));
-    snprintf(expected, sizeof(expected), spacepad_format,
-             spec - absl::kSpacePad2 + 2, v);
-    EXPECT_EQ(expected, actual)
-        << " decimal value " << v << " format '" << spacepad_format
-        << "' digits " << (spec - absl::kSpacePad2 + 2);
-  }
-}
-
-void CheckHexDec64(uint64_t v) {
-  unsigned long long ullv = v;  // NOLINT(runtime/int)
-
-  CheckHex(ullv, "%llx", "%0*llx", "%*llx");
-  CheckDec(ullv, "%llu", "%0*llu", "%*llu");
-
-  long long llv = static_cast<long long>(ullv);  // NOLINT(runtime/int)
-  CheckDec(llv, "%lld", "%0*lld", "%*lld");
-
-  if (sizeof(v) == sizeof(&v)) {
-    auto uintptr = static_cast<uintptr_t>(v);
-    void* ptr = reinterpret_cast<void*>(uintptr);
-    CheckHex(ptr, "%llx", "%0*llx", "%*llx");
-  }
-}
-
-void CheckHexDec32(uint32_t uv) {
-  CheckHex(uv, "%x", "%0*x", "%*x");
-  CheckDec(uv, "%u", "%0*u", "%*u");
-  int32_t v = static_cast<int32_t>(uv);
-  CheckDec(v, "%d", "%0*d", "%*d");
-
-  if (sizeof(v) == sizeof(&v)) {
-    auto uintptr = static_cast<uintptr_t>(v);
-    void* ptr = reinterpret_cast<void*>(uintptr);
-    CheckHex(ptr, "%x", "%0*x", "%*x");
-  }
-}
-
-void CheckAll(uint64_t v) {
-  CheckHexDec64(v);
-  CheckHexDec32(static_cast<uint32_t>(v));
-}
-
-void TestFastPrints() {
-  // Test all small ints; there aren't many and they're common.
-  for (int i = 0; i < 10000; i++) {
-    CheckAll(i);
-  }
-
-  CheckAll(std::numeric_limits<uint64_t>::max());
-  CheckAll(std::numeric_limits<uint64_t>::max() - 1);
-  CheckAll(std::numeric_limits<int64_t>::min());
-  CheckAll(std::numeric_limits<int64_t>::min() + 1);
-  CheckAll(std::numeric_limits<uint32_t>::max());
-  CheckAll(std::numeric_limits<uint32_t>::max() - 1);
-  CheckAll(std::numeric_limits<int32_t>::min());
-  CheckAll(std::numeric_limits<int32_t>::min() + 1);
-  CheckAll(999999999);              // fits in 32 bits
-  CheckAll(1000000000);             // fits in 32 bits
-  CheckAll(9999999999);             // doesn't fit in 32 bits
-  CheckAll(10000000000);            // doesn't fit in 32 bits
-  CheckAll(999999999999999999);     // fits in signed 64-bit
-  CheckAll(9999999999999999999u);   // fits in unsigned 64-bit, but not signed.
-  CheckAll(1000000000000000000);    // fits in signed 64-bit
-  CheckAll(10000000000000000000u);  // fits in unsigned 64-bit, but not signed.
-
-  CheckAll(999999999876543210);    // check all decimal digits, signed
-  CheckAll(9999999999876543210u);  // check all decimal digits, unsigned.
-  CheckAll(0x123456789abcdef0);    // check all hex digits
-  CheckAll(0x12345678);
-
-  int8_t minus_one_8bit = -1;
-  EXPECT_EQ("ff", absl::StrCat(absl::Hex(minus_one_8bit)));
-
-  int16_t minus_one_16bit = -1;
-  EXPECT_EQ("ffff", absl::StrCat(absl::Hex(minus_one_16bit)));
-}
-
-TEST(Numbers, TestFunctionsMovedOverFromNumbersMain) {
-  TestFastPrints();
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_format.h b/third_party/abseil/absl/strings/str_format.h
deleted file mode 100644
index 0146510..0000000
--- a/third_party/abseil/absl/strings/str_format.h
+++ /dev/null
@@ -1,813 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: str_format.h
-// -----------------------------------------------------------------------------
-//
-// The `str_format` library is a typesafe replacement for the family of
-// `printf()` string formatting routines within the `<cstdio>` standard library
-// header. Like the `printf` family, `str_format` uses a "format string" to
-// perform argument substitutions based on types. See the `FormatSpec` section
-// below for format string documentation.
-//
-// Example:
-//
-//   std::string s = absl::StrFormat(
-//                      "%s %s You have $%d!", "Hello", name, dollars);
-//
-// The library consists of the following basic utilities:
-//
-//   * `absl::StrFormat()`, a type-safe replacement for `std::sprintf()`, to
-//     write a format string to a `string` value.
-//   * `absl::StrAppendFormat()` to append a format string to a `string`
-//   * `absl::StreamFormat()` to more efficiently write a format string to a
-//     stream, such as`std::cout`.
-//   * `absl::PrintF()`, `absl::FPrintF()` and `absl::SNPrintF()` as
-//     replacements for `std::printf()`, `std::fprintf()` and `std::snprintf()`.
-//
-//     Note: a version of `std::sprintf()` is not supported as it is
-//     generally unsafe due to buffer overflows.
-//
-// Additionally, you can provide a format string (and its associated arguments)
-// using one of the following abstractions:
-//
-//   * A `FormatSpec` class template fully encapsulates a format string and its
-//     type arguments and is usually provided to `str_format` functions as a
-//     variadic argument of type `FormatSpec<Arg...>`. The `FormatSpec<Args...>`
-//     template is evaluated at compile-time, providing type safety.
-//   * A `ParsedFormat` instance, which encapsulates a specific, pre-compiled
-//     format string for a specific set of type(s), and which can be passed
-//     between API boundaries. (The `FormatSpec` type should not be used
-//     directly except as an argument type for wrapper functions.)
-//
-// The `str_format` library provides the ability to output its format strings to
-// arbitrary sink types:
-//
-//   * A generic `Format()` function to write outputs to arbitrary sink types,
-//     which must implement a `FormatRawSink` interface.
-//
-//   * A `FormatUntyped()` function that is similar to `Format()` except it is
-//     loosely typed. `FormatUntyped()` is not a template and does not perform
-//     any compile-time checking of the format string; instead, it returns a
-//     boolean from a runtime check.
-//
-// In addition, the `str_format` library provides extension points for
-// augmenting formatting to new types.  See "StrFormat Extensions" below.
-
-#ifndef ABSL_STRINGS_STR_FORMAT_H_
-#define ABSL_STRINGS_STR_FORMAT_H_
-
-#include <cstdio>
-#include <string>
-
-#include "absl/strings/internal/str_format/arg.h"  // IWYU pragma: export
-#include "absl/strings/internal/str_format/bind.h"  // IWYU pragma: export
-#include "absl/strings/internal/str_format/checker.h"  // IWYU pragma: export
-#include "absl/strings/internal/str_format/extension.h"  // IWYU pragma: export
-#include "absl/strings/internal/str_format/parser.h"  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// UntypedFormatSpec
-//
-// A type-erased class that can be used directly within untyped API entry
-// points. An `UntypedFormatSpec` is specifically used as an argument to
-// `FormatUntyped()`.
-//
-// Example:
-//
-//   absl::UntypedFormatSpec format("%d");
-//   std::string out;
-//   CHECK(absl::FormatUntyped(&out, format, {absl::FormatArg(1)}));
-class UntypedFormatSpec {
- public:
-  UntypedFormatSpec() = delete;
-  UntypedFormatSpec(const UntypedFormatSpec&) = delete;
-  UntypedFormatSpec& operator=(const UntypedFormatSpec&) = delete;
-
-  explicit UntypedFormatSpec(string_view s) : spec_(s) {}
-
- protected:
-  explicit UntypedFormatSpec(const str_format_internal::ParsedFormatBase* pc)
-      : spec_(pc) {}
-
- private:
-  friend str_format_internal::UntypedFormatSpecImpl;
-  str_format_internal::UntypedFormatSpecImpl spec_;
-};
-
-// FormatStreamed()
-//
-// Takes a streamable argument and returns an object that can print it
-// with '%s'. Allows printing of types that have an `operator<<` but no
-// intrinsic type support within `StrFormat()` itself.
-//
-// Example:
-//
-//   absl::StrFormat("%s", absl::FormatStreamed(obj));
-template <typename T>
-str_format_internal::StreamedWrapper<T> FormatStreamed(const T& v) {
-  return str_format_internal::StreamedWrapper<T>(v);
-}
-
-// FormatCountCapture
-//
-// This class provides a way to safely wrap `StrFormat()` captures of `%n`
-// conversions, which denote the number of characters written by a formatting
-// operation to this point, into an integer value.
-//
-// This wrapper is designed to allow safe usage of `%n` within `StrFormat(); in
-// the `printf()` family of functions, `%n` is not safe to use, as the `int *`
-// buffer can be used to capture arbitrary data.
-//
-// Example:
-//
-//   int n = 0;
-//   std::string s = absl::StrFormat("%s%d%n", "hello", 123,
-//                       absl::FormatCountCapture(&n));
-//   EXPECT_EQ(8, n);
-class FormatCountCapture {
- public:
-  explicit FormatCountCapture(int* p) : p_(p) {}
-
- private:
-  // FormatCountCaptureHelper is used to define FormatConvertImpl() for this
-  // class.
-  friend struct str_format_internal::FormatCountCaptureHelper;
-  // Unused() is here because of the false positive from -Wunused-private-field
-  // p_ is used in the templated function of the friend FormatCountCaptureHelper
-  // class.
-  int* Unused() { return p_; }
-  int* p_;
-};
-
-// FormatSpec
-//
-// The `FormatSpec` type defines the makeup of a format string within the
-// `str_format` library. It is a variadic class template that is evaluated at
-// compile-time, according to the format string and arguments that are passed to
-// it.
-//
-// You should not need to manipulate this type directly. You should only name it
-// if you are writing wrapper functions which accept format arguments that will
-// be provided unmodified to functions in this library. Such a wrapper function
-// might be a class method that provides format arguments and/or internally uses
-// the result of formatting.
-//
-// For a `FormatSpec` to be valid at compile-time, it must be provided as
-// either:
-//
-// * A `constexpr` literal or `absl::string_view`, which is how it most often
-//   used.
-// * A `ParsedFormat` instantiation, which ensures the format string is
-//   valid before use. (See below.)
-//
-// Example:
-//
-//   // Provided as a string literal.
-//   absl::StrFormat("Welcome to %s, Number %d!", "The Village", 6);
-//
-//   // Provided as a constexpr absl::string_view.
-//   constexpr absl::string_view formatString = "Welcome to %s, Number %d!";
-//   absl::StrFormat(formatString, "The Village", 6);
-//
-//   // Provided as a pre-compiled ParsedFormat object.
-//   // Note that this example is useful only for illustration purposes.
-//   absl::ParsedFormat<'s', 'd'> formatString("Welcome to %s, Number %d!");
-//   absl::StrFormat(formatString, "TheVillage", 6);
-//
-// A format string generally follows the POSIX syntax as used within the POSIX
-// `printf` specification.
-//
-// (See http://pubs.opengroup.org/onlinepubs/9699919799/functions/fprintf.html.)
-//
-// In specific, the `FormatSpec` supports the following type specifiers:
-//   * `c` for characters
-//   * `s` for strings
-//   * `d` or `i` for integers
-//   * `o` for unsigned integer conversions into octal
-//   * `x` or `X` for unsigned integer conversions into hex
-//   * `u` for unsigned integers
-//   * `f` or `F` for floating point values into decimal notation
-//   * `e` or `E` for floating point values into exponential notation
-//   * `a` or `A` for floating point values into hex exponential notation
-//   * `g` or `G` for floating point values into decimal or exponential
-//     notation based on their precision
-//   * `p` for pointer address values
-//   * `n` for the special case of writing out the number of characters
-//     written to this point. The resulting value must be captured within an
-//     `absl::FormatCountCapture` type.
-//
-// Implementation-defined behavior:
-//   * A null pointer provided to "%s" or "%p" is output as "(nil)".
-//   * A non-null pointer provided to "%p" is output in hex as if by %#x or
-//     %#lx.
-//
-// NOTE: `o`, `x\X` and `u` will convert signed values to their unsigned
-// counterpart before formatting.
-//
-// Examples:
-//     "%c", 'a'                -> "a"
-//     "%c", 32                 -> " "
-//     "%s", "C"                -> "C"
-//     "%s", std::string("C++") -> "C++"
-//     "%d", -10                -> "-10"
-//     "%o", 10                 -> "12"
-//     "%x", 16                 -> "10"
-//     "%f", 123456789          -> "123456789.000000"
-//     "%e", .01                -> "1.00000e-2"
-//     "%a", -3.0               -> "-0x1.8p+1"
-//     "%g", .01                -> "1e-2"
-//     "%p", (void*)&value      -> "0x7ffdeb6ad2a4"
-//
-//     int n = 0;
-//     std::string s = absl::StrFormat(
-//         "%s%d%n", "hello", 123, absl::FormatCountCapture(&n));
-//     EXPECT_EQ(8, n);
-//
-// The `FormatSpec` intrinsically supports all of these fundamental C++ types:
-//
-// *   Characters: `char`, `signed char`, `unsigned char`
-// *   Integers: `int`, `short`, `unsigned short`, `unsigned`, `long`,
-//         `unsigned long`, `long long`, `unsigned long long`
-// *   Floating-point: `float`, `double`, `long double`
-//
-// However, in the `str_format` library, a format conversion specifies a broader
-// C++ conceptual category instead of an exact type. For example, `%s` binds to
-// any string-like argument, so `std::string`, `absl::string_view`, and
-// `const char*` are all accepted. Likewise, `%d` accepts any integer-like
-// argument, etc.
-
-template <typename... Args>
-using FormatSpec = str_format_internal::FormatSpecTemplate<
-    str_format_internal::ArgumentToConv<Args>()...>;
-
-// ParsedFormat
-//
-// A `ParsedFormat` is a class template representing a preparsed `FormatSpec`,
-// with template arguments specifying the conversion characters used within the
-// format string. Such characters must be valid format type specifiers, and
-// these type specifiers are checked at compile-time.
-//
-// Instances of `ParsedFormat` can be created, copied, and reused to speed up
-// formatting loops. A `ParsedFormat` may either be constructed statically, or
-// dynamically through its `New()` factory function, which only constructs a
-// runtime object if the format is valid at that time.
-//
-// Example:
-//
-//   // Verified at compile time.
-//   absl::ParsedFormat<'s', 'd'> formatString("Welcome to %s, Number %d!");
-//   absl::StrFormat(formatString, "TheVillage", 6);
-//
-//   // Verified at runtime.
-//   auto format_runtime = absl::ParsedFormat<'d'>::New(format_string);
-//   if (format_runtime) {
-//     value = absl::StrFormat(*format_runtime, i);
-//   } else {
-//     ... error case ...
-//   }
-
-#if defined(__cpp_nontype_template_parameter_auto)
-// If C++17 is available, an 'extended' format is also allowed that can specify
-// multiple conversion characters per format argument, using a combination of
-// `absl::FormatConversionCharSet` enum values (logically a set union)
-//  via the `|` operator. (Single character-based arguments are still accepted,
-// but cannot be combined). Some common conversions also have predefined enum
-// values, such as `absl::FormatConversionCharSet::kIntegral`.
-//
-// Example:
-//   // Extended format supports multiple conversion characters per argument,
-//   // specified via a combination of `FormatConversionCharSet` enums.
-//   using MyFormat = absl::ParsedFormat<absl::FormatConversionCharSet::d |
-//                                       absl::FormatConversionCharSet::x>;
-//   MyFormat GetFormat(bool use_hex) {
-//     if (use_hex) return MyFormat("foo %x bar");
-//     return MyFormat("foo %d bar");
-//   }
-//   // `format` can be used with any value that supports 'd' and 'x',
-//   // like `int`.
-//   auto format = GetFormat(use_hex);
-//   value = StringF(format, i);
-template <auto... Conv>
-using ParsedFormat = absl::str_format_internal::ExtendedParsedFormat<
-    absl::str_format_internal::ToFormatConversionCharSet(Conv)...>;
-#else
-template <char... Conv>
-using ParsedFormat = str_format_internal::ExtendedParsedFormat<
-    absl::str_format_internal::ToFormatConversionCharSet(Conv)...>;
-#endif  // defined(__cpp_nontype_template_parameter_auto)
-
-// StrFormat()
-//
-// Returns a `string` given a `printf()`-style format string and zero or more
-// additional arguments. Use it as you would `sprintf()`. `StrFormat()` is the
-// primary formatting function within the `str_format` library, and should be
-// used in most cases where you need type-safe conversion of types into
-// formatted strings.
-//
-// The format string generally consists of ordinary character data along with
-// one or more format conversion specifiers (denoted by the `%` character).
-// Ordinary character data is returned unchanged into the result string, while
-// each conversion specification performs a type substitution from
-// `StrFormat()`'s other arguments. See the comments for `FormatSpec` for full
-// information on the makeup of this format string.
-//
-// Example:
-//
-//   std::string s = absl::StrFormat(
-//       "Welcome to %s, Number %d!", "The Village", 6);
-//   EXPECT_EQ("Welcome to The Village, Number 6!", s);
-//
-// Returns an empty string in case of error.
-template <typename... Args>
-ABSL_MUST_USE_RESULT std::string StrFormat(const FormatSpec<Args...>& format,
-                                           const Args&... args) {
-  return str_format_internal::FormatPack(
-      str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// StrAppendFormat()
-//
-// Appends to a `dst` string given a format string, and zero or more additional
-// arguments, returning `*dst` as a convenience for chaining purposes. Appends
-// nothing in case of error (but possibly alters its capacity).
-//
-// Example:
-//
-//   std::string orig("For example PI is approximately ");
-//   std::cout << StrAppendFormat(&orig, "%12.6f", 3.14);
-template <typename... Args>
-std::string& StrAppendFormat(std::string* dst,
-                             const FormatSpec<Args...>& format,
-                             const Args&... args) {
-  return str_format_internal::AppendPack(
-      dst, str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// StreamFormat()
-//
-// Writes to an output stream given a format string and zero or more arguments,
-// generally in a manner that is more efficient than streaming the result of
-// `absl:: StrFormat()`. The returned object must be streamed before the full
-// expression ends.
-//
-// Example:
-//
-//   std::cout << StreamFormat("%12.6f", 3.14);
-template <typename... Args>
-ABSL_MUST_USE_RESULT str_format_internal::Streamable StreamFormat(
-    const FormatSpec<Args...>& format, const Args&... args) {
-  return str_format_internal::Streamable(
-      str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// PrintF()
-//
-// Writes to stdout given a format string and zero or more arguments. This
-// function is functionally equivalent to `std::printf()` (and type-safe);
-// prefer `absl::PrintF()` over `std::printf()`.
-//
-// Example:
-//
-//   std::string_view s = "Ulaanbaatar";
-//   absl::PrintF("The capital of Mongolia is %s", s);
-//
-//   Outputs: "The capital of Mongolia is Ulaanbaatar"
-//
-template <typename... Args>
-int PrintF(const FormatSpec<Args...>& format, const Args&... args) {
-  return str_format_internal::FprintF(
-      stdout, str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// FPrintF()
-//
-// Writes to a file given a format string and zero or more arguments. This
-// function is functionally equivalent to `std::fprintf()` (and type-safe);
-// prefer `absl::FPrintF()` over `std::fprintf()`.
-//
-// Example:
-//
-//   std::string_view s = "Ulaanbaatar";
-//   absl::FPrintF(stdout, "The capital of Mongolia is %s", s);
-//
-//   Outputs: "The capital of Mongolia is Ulaanbaatar"
-//
-template <typename... Args>
-int FPrintF(std::FILE* output, const FormatSpec<Args...>& format,
-            const Args&... args) {
-  return str_format_internal::FprintF(
-      output, str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// SNPrintF()
-//
-// Writes to a sized buffer given a format string and zero or more arguments.
-// This function is functionally equivalent to `std::snprintf()` (and
-// type-safe); prefer `absl::SNPrintF()` over `std::snprintf()`.
-//
-// In particular, a successful call to `absl::SNPrintF()` writes at most `size`
-// bytes of the formatted output to `output`, including a NUL-terminator, and
-// returns the number of bytes that would have been written if truncation did
-// not occur. In the event of an error, a negative value is returned and `errno`
-// is set.
-//
-// Example:
-//
-//   std::string_view s = "Ulaanbaatar";
-//   char output[128];
-//   absl::SNPrintF(output, sizeof(output),
-//                  "The capital of Mongolia is %s", s);
-//
-//   Post-condition: output == "The capital of Mongolia is Ulaanbaatar"
-//
-template <typename... Args>
-int SNPrintF(char* output, std::size_t size, const FormatSpec<Args...>& format,
-             const Args&... args) {
-  return str_format_internal::SnprintF(
-      output, size, str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// -----------------------------------------------------------------------------
-// Custom Output Formatting Functions
-// -----------------------------------------------------------------------------
-
-// FormatRawSink
-//
-// FormatRawSink is a type erased wrapper around arbitrary sink objects
-// specifically used as an argument to `Format()`.
-//
-// All the object has to do define an overload of `AbslFormatFlush()` for the
-// sink, usually by adding a ADL-based free function in the same namespace as
-// the sink:
-//
-//   void AbslFormatFlush(MySink* dest, absl::string_view part);
-//
-// where `dest` is the pointer passed to `absl::Format()`. The function should
-// append `part` to `dest`.
-//
-// FormatRawSink does not own the passed sink object. The passed object must
-// outlive the FormatRawSink.
-class FormatRawSink {
- public:
-  // Implicitly convert from any type that provides the hook function as
-  // described above.
-  template <typename T,
-            typename = typename std::enable_if<std::is_constructible<
-                str_format_internal::FormatRawSinkImpl, T*>::value>::type>
-  FormatRawSink(T* raw)  // NOLINT
-      : sink_(raw) {}
-
- private:
-  friend str_format_internal::FormatRawSinkImpl;
-  str_format_internal::FormatRawSinkImpl sink_;
-};
-
-// Format()
-//
-// Writes a formatted string to an arbitrary sink object (implementing the
-// `absl::FormatRawSink` interface), using a format string and zero or more
-// additional arguments.
-//
-// By default, `std::string`, `std::ostream`, and `absl::Cord` are supported as
-// destination objects. If a `std::string` is used the formatted string is
-// appended to it.
-//
-// `absl::Format()` is a generic version of `absl::StrAppendFormat()`, for
-// custom sinks. The format string, like format strings for `StrFormat()`, is
-// checked at compile-time.
-//
-// On failure, this function returns `false` and the state of the sink is
-// unspecified.
-template <typename... Args>
-bool Format(FormatRawSink raw_sink, const FormatSpec<Args...>& format,
-            const Args&... args) {
-  return str_format_internal::FormatUntyped(
-      str_format_internal::FormatRawSinkImpl::Extract(raw_sink),
-      str_format_internal::UntypedFormatSpecImpl::Extract(format),
-      {str_format_internal::FormatArgImpl(args)...});
-}
-
-// FormatArg
-//
-// A type-erased handle to a format argument specifically used as an argument to
-// `FormatUntyped()`. You may construct `FormatArg` by passing
-// reference-to-const of any printable type. `FormatArg` is both copyable and
-// assignable. The source data must outlive the `FormatArg` instance. See
-// example below.
-//
-using FormatArg = str_format_internal::FormatArgImpl;
-
-// FormatUntyped()
-//
-// Writes a formatted string to an arbitrary sink object (implementing the
-// `absl::FormatRawSink` interface), using an `UntypedFormatSpec` and zero or
-// more additional arguments.
-//
-// This function acts as the most generic formatting function in the
-// `str_format` library. The caller provides a raw sink, an unchecked format
-// string, and (usually) a runtime specified list of arguments; no compile-time
-// checking of formatting is performed within this function. As a result, a
-// caller should check the return value to verify that no error occurred.
-// On failure, this function returns `false` and the state of the sink is
-// unspecified.
-//
-// The arguments are provided in an `absl::Span<const absl::FormatArg>`.
-// Each `absl::FormatArg` object binds to a single argument and keeps a
-// reference to it. The values used to create the `FormatArg` objects must
-// outlive this function call. (See `str_format_arg.h` for information on
-// the `FormatArg` class.)_
-//
-// Example:
-//
-//   std::optional<std::string> FormatDynamic(
-//       const std::string& in_format,
-//       const vector<std::string>& in_args) {
-//     std::string out;
-//     std::vector<absl::FormatArg> args;
-//     for (const auto& v : in_args) {
-//       // It is important that 'v' is a reference to the objects in in_args.
-//       // The values we pass to FormatArg must outlive the call to
-//       // FormatUntyped.
-//       args.emplace_back(v);
-//     }
-//     absl::UntypedFormatSpec format(in_format);
-//     if (!absl::FormatUntyped(&out, format, args)) {
-//       return std::nullopt;
-//     }
-//     return std::move(out);
-//   }
-//
-ABSL_MUST_USE_RESULT inline bool FormatUntyped(
-    FormatRawSink raw_sink, const UntypedFormatSpec& format,
-    absl::Span<const FormatArg> args) {
-  return str_format_internal::FormatUntyped(
-      str_format_internal::FormatRawSinkImpl::Extract(raw_sink),
-      str_format_internal::UntypedFormatSpecImpl::Extract(format), args);
-}
-
-//------------------------------------------------------------------------------
-// StrFormat Extensions
-//------------------------------------------------------------------------------
-//
-// AbslFormatConvert()
-//
-// The StrFormat library provides a customization API for formatting
-// user-defined types using absl::StrFormat(). The API relies on detecting an
-// overload in the user-defined type's namespace of a free (non-member)
-// `AbslFormatConvert()` function, usually as a friend definition with the
-// following signature:
-//
-// absl::FormatConvertResult<...> AbslFormatConvert(
-//     const X& value,
-//     const absl::FormatConversionSpec& spec,
-//     absl::FormatSink *sink);
-//
-// An `AbslFormatConvert()` overload for a type should only be declared in the
-// same file and namespace as said type.
-//
-// The abstractions within this definition include:
-//
-// * An `absl::FormatConversionSpec` to specify the fields to pull from a
-//   user-defined type's format string
-// * An `absl::FormatSink` to hold the converted string data during the
-//   conversion process.
-// * An `absl::FormatConvertResult` to hold the status of the returned
-//   formatting operation
-//
-// The return type encodes all the conversion characters that your
-// AbslFormatConvert() routine accepts.  The return value should be {true}.
-// A return value of {false} will result in `StrFormat()` returning
-// an empty string.  This result will be propagated to the result of
-// `FormatUntyped`.
-//
-// Example:
-//
-// struct Point {
-//   // To add formatting support to `Point`, we simply need to add a free
-//   // (non-member) function `AbslFormatConvert()`.  This method interprets
-//   // `spec` to print in the request format. The allowed conversion characters
-//   // can be restricted via the type of the result, in this example
-//   // string and integral formatting are allowed (but not, for instance
-//   // floating point characters like "%f").  You can add such a free function
-//   // using a friend declaration within the body of the class:
-//   friend absl::FormatConvertResult<absl::FormatConversionCharSet::kString |
-//                                    absl::FormatConversionCharSet::kIntegral>
-//   AbslFormatConvert(const Point& p, const absl::FormatConversionSpec& spec,
-//                     absl::FormatSink* s) {
-//     if (spec.conversion_char() == absl::FormatConversionChar::s) {
-//       s->Append(absl::StrCat("x=", p.x, " y=", p.y));
-//     } else {
-//       s->Append(absl::StrCat(p.x, ",", p.y));
-//     }
-//     return {true};
-//   }
-//
-//   int x;
-//   int y;
-// };
-
-// clang-format off
-
-// FormatConversionChar
-//
-// Specifies the formatting character provided in the format string
-// passed to `StrFormat()`.
-enum class FormatConversionChar : uint8_t {
-  c, s,                    // text
-  d, i, o, u, x, X,        // int
-  f, F, e, E, g, G, a, A,  // float
-  n, p                     // misc
-};
-// clang-format on
-
-// FormatConversionSpec
-//
-// Specifies modifications to the conversion of the format string, through use
-// of one or more format flags in the source format string.
-class FormatConversionSpec {
- public:
-  // FormatConversionSpec::is_basic()
-  //
-  // Indicates that width and precision are not specified, and no additional
-  // flags are set for this conversion character in the format string.
-  bool is_basic() const { return impl_.is_basic(); }
-
-  // FormatConversionSpec::has_left_flag()
-  //
-  // Indicates whether the result should be left justified for this conversion
-  // character in the format string. This flag is set through use of a '-'
-  // character in the format string. E.g. "%-s"
-  bool has_left_flag() const { return impl_.has_left_flag(); }
-
-  // FormatConversionSpec::has_show_pos_flag()
-  //
-  // Indicates whether a sign column is prepended to the result for this
-  // conversion character in the format string, even if the result is positive.
-  // This flag is set through use of a '+' character in the format string.
-  // E.g. "%+d"
-  bool has_show_pos_flag() const { return impl_.has_show_pos_flag(); }
-
-  // FormatConversionSpec::has_sign_col_flag()
-  //
-  // Indicates whether a mandatory sign column is added to the result for this
-  // conversion character. This flag is set through use of a space character
-  // (' ') in the format string. E.g. "% i"
-  bool has_sign_col_flag() const { return impl_.has_sign_col_flag(); }
-
-  // FormatConversionSpec::has_alt_flag()
-  //
-  // Indicates whether an "alternate" format is applied to the result for this
-  // conversion character. Alternative forms depend on the type of conversion
-  // character, and unallowed alternatives are undefined. This flag is set
-  // through use of a '#' character in the format string. E.g. "%#h"
-  bool has_alt_flag() const { return impl_.has_alt_flag(); }
-
-  // FormatConversionSpec::has_zero_flag()
-  //
-  // Indicates whether zeroes should be prepended to the result for this
-  // conversion character instead of spaces. This flag is set through use of the
-  // '0' character in the format string. E.g. "%0f"
-  bool has_zero_flag() const { return impl_.has_zero_flag(); }
-
-  // FormatConversionSpec::conversion_char()
-  //
-  // Returns the underlying conversion character.
-  FormatConversionChar conversion_char() const {
-    return impl_.conversion_char();
-  }
-
-  // FormatConversionSpec::width()
-  //
-  // Returns the specified width (indicated through use of a non-zero integer
-  // value or '*' character) of the conversion character. If width is
-  // unspecified, it returns a negative value.
-  int width() const { return impl_.width(); }
-
-  // FormatConversionSpec::precision()
-  //
-  // Returns the specified precision (through use of the '.' character followed
-  // by a non-zero integer value or '*' character) of the conversion character.
-  // If precision is unspecified, it returns a negative value.
-  int precision() const { return impl_.precision(); }
-
- private:
-  explicit FormatConversionSpec(
-      str_format_internal::FormatConversionSpecImpl impl)
-      : impl_(impl) {}
-
-  friend str_format_internal::FormatConversionSpecImpl;
-
-  absl::str_format_internal::FormatConversionSpecImpl impl_;
-};
-
-// Type safe OR operator for FormatConversionCharSet to allow accepting multiple
-// conversion chars in custom format converters.
-constexpr FormatConversionCharSet operator|(FormatConversionCharSet a,
-                                            FormatConversionCharSet b) {
-  return static_cast<FormatConversionCharSet>(static_cast<uint64_t>(a) |
-                                              static_cast<uint64_t>(b));
-}
-
-// FormatConversionCharSet
-//
-// Specifies the _accepted_ conversion types as a template parameter to
-// FormatConvertResult for custom implementations of `AbslFormatConvert`.
-// Note the helper predefined alias definitions (kIntegral, etc.) below.
-enum class FormatConversionCharSet : uint64_t {
-  // text
-  c = str_format_internal::FormatConversionCharToConvInt('c'),
-  s = str_format_internal::FormatConversionCharToConvInt('s'),
-  // integer
-  d = str_format_internal::FormatConversionCharToConvInt('d'),
-  i = str_format_internal::FormatConversionCharToConvInt('i'),
-  o = str_format_internal::FormatConversionCharToConvInt('o'),
-  u = str_format_internal::FormatConversionCharToConvInt('u'),
-  x = str_format_internal::FormatConversionCharToConvInt('x'),
-  X = str_format_internal::FormatConversionCharToConvInt('X'),
-  // Float
-  f = str_format_internal::FormatConversionCharToConvInt('f'),
-  F = str_format_internal::FormatConversionCharToConvInt('F'),
-  e = str_format_internal::FormatConversionCharToConvInt('e'),
-  E = str_format_internal::FormatConversionCharToConvInt('E'),
-  g = str_format_internal::FormatConversionCharToConvInt('g'),
-  G = str_format_internal::FormatConversionCharToConvInt('G'),
-  a = str_format_internal::FormatConversionCharToConvInt('a'),
-  A = str_format_internal::FormatConversionCharToConvInt('A'),
-  // misc
-  n = str_format_internal::FormatConversionCharToConvInt('n'),
-  p = str_format_internal::FormatConversionCharToConvInt('p'),
-
-  // Used for width/precision '*' specification.
-  kStar = static_cast<uint64_t>(
-      absl::str_format_internal::FormatConversionCharSetInternal::kStar),
-  // Some predefined values:
-  kIntegral = d | i | u | o | x | X,
-  kFloating = a | e | f | g | A | E | F | G,
-  kNumeric = kIntegral | kFloating,
-  kString = s,
-  kPointer = p,
-};
-
-// FormatSink
-//
-// An abstraction to which conversions write their string data.
-//
-class FormatSink {
- public:
-  // Appends `count` copies of `ch`.
-  void Append(size_t count, char ch) { sink_->Append(count, ch); }
-
-  void Append(string_view v) { sink_->Append(v); }
-
-  // Appends the first `precision` bytes of `v`. If this is less than
-  // `width`, spaces will be appended first (if `left` is false), or
-  // after (if `left` is true) to ensure the total amount appended is
-  // at least `width`.
-  bool PutPaddedString(string_view v, int width, int precision, bool left) {
-    return sink_->PutPaddedString(v, width, precision, left);
-  }
-
- private:
-  friend str_format_internal::FormatSinkImpl;
-  explicit FormatSink(str_format_internal::FormatSinkImpl* s) : sink_(s) {}
-  str_format_internal::FormatSinkImpl* sink_;
-};
-
-// FormatConvertResult
-//
-// Indicates whether a call to AbslFormatConvert() was successful.
-// This return type informs the StrFormat extension framework (through
-// ADL but using the return type) of what conversion characters are supported.
-// It is strongly discouraged to return {false}, as this will result in an
-// empty string in StrFormat.
-template <FormatConversionCharSet C>
-struct FormatConvertResult {
-  bool value;
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STR_FORMAT_H_
diff --git a/third_party/abseil/absl/strings/str_format_test.cc b/third_party/abseil/absl/strings/str_format_test.cc
deleted file mode 100644
index c60027a..0000000
--- a/third_party/abseil/absl/strings/str_format_test.cc
+++ /dev/null
@@ -1,774 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_format.h"
-
-#include <cstdarg>
-#include <cstdint>
-#include <cstdio>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/cord.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-using str_format_internal::FormatArgImpl;
-
-using FormatEntryPointTest = ::testing::Test;
-
-TEST_F(FormatEntryPointTest, Format) {
-  std::string sink;
-  EXPECT_TRUE(Format(&sink, "A format %d", 123));
-  EXPECT_EQ("A format 123", sink);
-  sink.clear();
-
-  ParsedFormat<'d'> pc("A format %d");
-  EXPECT_TRUE(Format(&sink, pc, 123));
-  EXPECT_EQ("A format 123", sink);
-}
-TEST_F(FormatEntryPointTest, UntypedFormat) {
-  constexpr const char* formats[] = {
-    "",
-    "a",
-    "%80d",
-#if !defined(_MSC_VER) && !defined(__ANDROID__) && !defined(__native_client__)
-    // MSVC, NaCL and Android don't support positional syntax.
-    "complicated multipart %% %1$d format %1$0999d",
-#endif  // _MSC_VER
-  };
-  for (const char* fmt : formats) {
-    std::string actual;
-    int i = 123;
-    FormatArgImpl arg_123(i);
-    absl::Span<const FormatArgImpl> args(&arg_123, 1);
-    UntypedFormatSpec format(fmt);
-
-    EXPECT_TRUE(FormatUntyped(&actual, format, args));
-    char buf[4096]{};
-    snprintf(buf, sizeof(buf), fmt, 123);
-    EXPECT_EQ(
-        str_format_internal::FormatPack(
-            str_format_internal::UntypedFormatSpecImpl::Extract(format), args),
-        buf);
-    EXPECT_EQ(actual, buf);
-  }
-  // The internal version works with a preparsed format.
-  ParsedFormat<'d'> pc("A format %d");
-  int i = 345;
-  FormatArg arg(i);
-  std::string out;
-  EXPECT_TRUE(str_format_internal::FormatUntyped(
-      &out, str_format_internal::UntypedFormatSpecImpl(&pc), {&arg, 1}));
-  EXPECT_EQ("A format 345", out);
-}
-
-TEST_F(FormatEntryPointTest, StringFormat) {
-  EXPECT_EQ("123", StrFormat("%d", 123));
-  constexpr absl::string_view view("=%d=", 4);
-  EXPECT_EQ("=123=", StrFormat(view, 123));
-}
-
-TEST_F(FormatEntryPointTest, AppendFormat) {
-  std::string s;
-  std::string& r = StrAppendFormat(&s, "%d", 123);
-  EXPECT_EQ(&s, &r);  // should be same object
-  EXPECT_EQ("123", r);
-}
-
-TEST_F(FormatEntryPointTest, AppendFormatFail) {
-  std::string s = "orig";
-
-  UntypedFormatSpec format(" more %d");
-  FormatArgImpl arg("not an int");
-
-  EXPECT_EQ("orig",
-            str_format_internal::AppendPack(
-                &s, str_format_internal::UntypedFormatSpecImpl::Extract(format),
-                {&arg, 1}));
-}
-
-
-TEST_F(FormatEntryPointTest, ManyArgs) {
-  EXPECT_EQ("24", StrFormat("%24$d", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
-                            14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24));
-  EXPECT_EQ("60", StrFormat("%60$d", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
-                            14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
-                            27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
-                            40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
-                            53, 54, 55, 56, 57, 58, 59, 60));
-}
-
-TEST_F(FormatEntryPointTest, Preparsed) {
-  ParsedFormat<'d'> pc("%d");
-  EXPECT_EQ("123", StrFormat(pc, 123));
-  // rvalue ok?
-  EXPECT_EQ("123", StrFormat(ParsedFormat<'d'>("%d"), 123));
-  constexpr absl::string_view view("=%d=", 4);
-  EXPECT_EQ("=123=", StrFormat(ParsedFormat<'d'>(view), 123));
-}
-
-TEST_F(FormatEntryPointTest, FormatCountCapture) {
-  int n = 0;
-  EXPECT_EQ("", StrFormat("%n", FormatCountCapture(&n)));
-  EXPECT_EQ(0, n);
-  EXPECT_EQ("123", StrFormat("%d%n", 123, FormatCountCapture(&n)));
-  EXPECT_EQ(3, n);
-}
-
-TEST_F(FormatEntryPointTest, FormatCountCaptureWrongType) {
-  // Should reject int*.
-  int n = 0;
-  UntypedFormatSpec format("%d%n");
-  int i = 123, *ip = &n;
-  FormatArgImpl args[2] = {FormatArgImpl(i), FormatArgImpl(ip)};
-
-  EXPECT_EQ("", str_format_internal::FormatPack(
-                    str_format_internal::UntypedFormatSpecImpl::Extract(format),
-                    absl::MakeSpan(args)));
-}
-
-TEST_F(FormatEntryPointTest, FormatCountCaptureMultiple) {
-  int n1 = 0;
-  int n2 = 0;
-  EXPECT_EQ("    1         2",
-            StrFormat("%5d%n%10d%n", 1, FormatCountCapture(&n1), 2,
-                      FormatCountCapture(&n2)));
-  EXPECT_EQ(5, n1);
-  EXPECT_EQ(15, n2);
-}
-
-TEST_F(FormatEntryPointTest, FormatCountCaptureExample) {
-  int n;
-  std::string s;
-  StrAppendFormat(&s, "%s: %n%s\n", "(1,1)", FormatCountCapture(&n), "(1,2)");
-  StrAppendFormat(&s, "%*s%s\n", n, "", "(2,2)");
-  EXPECT_EQ(7, n);
-  EXPECT_EQ(
-      "(1,1): (1,2)\n"
-      "       (2,2)\n",
-      s);
-}
-
-TEST_F(FormatEntryPointTest, Stream) {
-  const std::string formats[] = {
-    "",
-    "a",
-    "%80d",
-    "%d %u %c %s %f %g",
-#if !defined(_MSC_VER) && !defined(__ANDROID__) && !defined(__native_client__)
-    // MSVC, NaCL and Android don't support positional syntax.
-    "complicated multipart %% %1$d format %1$080d",
-#endif  // _MSC_VER
-  };
-  std::string buf(4096, '\0');
-  for (const auto& fmt : formats) {
-    const auto parsed =
-        ParsedFormat<'d', 'u', 'c', 's', 'f', 'g'>::NewAllowIgnored(fmt);
-    std::ostringstream oss;
-    oss << StreamFormat(*parsed, 123, 3, 49, "multistreaming!!!", 1.01, 1.01);
-    int fmt_result = snprintf(&*buf.begin(), buf.size(), fmt.c_str(),  //
-                                 123, 3, 49, "multistreaming!!!", 1.01, 1.01);
-    ASSERT_TRUE(oss) << fmt;
-    ASSERT_TRUE(fmt_result >= 0 && static_cast<size_t>(fmt_result) < buf.size())
-        << fmt_result;
-    EXPECT_EQ(buf.c_str(), oss.str());
-  }
-}
-
-TEST_F(FormatEntryPointTest, StreamOk) {
-  std::ostringstream oss;
-  oss << StreamFormat("hello %d", 123);
-  EXPECT_EQ("hello 123", oss.str());
-  EXPECT_TRUE(oss.good());
-}
-
-TEST_F(FormatEntryPointTest, StreamFail) {
-  std::ostringstream oss;
-  UntypedFormatSpec format("hello %d");
-  FormatArgImpl arg("non-numeric");
-  oss << str_format_internal::Streamable(
-      str_format_internal::UntypedFormatSpecImpl::Extract(format), {&arg, 1});
-  EXPECT_EQ("hello ", oss.str());  // partial write
-  EXPECT_TRUE(oss.fail());
-}
-
-std::string WithSnprintf(const char* fmt, ...) {
-  std::string buf;
-  buf.resize(128);
-  va_list va;
-  va_start(va, fmt);
-  int r = vsnprintf(&*buf.begin(), buf.size(), fmt, va);
-  va_end(va);
-  EXPECT_GE(r, 0);
-  EXPECT_LT(r, buf.size());
-  buf.resize(r);
-  return buf;
-}
-
-TEST_F(FormatEntryPointTest, FloatPrecisionArg) {
-  // Test that positional parameters for width and precision
-  // are indexed to precede the value.
-  // Also sanity check the same formats against snprintf.
-  EXPECT_EQ("0.1", StrFormat("%.1f", 0.1));
-  EXPECT_EQ("0.1", WithSnprintf("%.1f", 0.1));
-  EXPECT_EQ("  0.1", StrFormat("%*.1f", 5, 0.1));
-  EXPECT_EQ("  0.1", WithSnprintf("%*.1f", 5, 0.1));
-  EXPECT_EQ("0.1", StrFormat("%.*f", 1, 0.1));
-  EXPECT_EQ("0.1", WithSnprintf("%.*f", 1, 0.1));
-  EXPECT_EQ("  0.1", StrFormat("%*.*f", 5, 1, 0.1));
-  EXPECT_EQ("  0.1", WithSnprintf("%*.*f", 5, 1, 0.1));
-}
-namespace streamed_test {
-struct X {};
-std::ostream& operator<<(std::ostream& os, const X&) {
-  return os << "X";
-}
-}  // streamed_test
-
-TEST_F(FormatEntryPointTest, FormatStreamed) {
-  EXPECT_EQ("123", StrFormat("%s", FormatStreamed(123)));
-  EXPECT_EQ("  123", StrFormat("%5s", FormatStreamed(123)));
-  EXPECT_EQ("123  ", StrFormat("%-5s", FormatStreamed(123)));
-  EXPECT_EQ("X", StrFormat("%s", FormatStreamed(streamed_test::X())));
-  EXPECT_EQ("123", StrFormat("%s", FormatStreamed(StreamFormat("%d", 123))));
-}
-
-// Helper class that creates a temporary file and exposes a FILE* to it.
-// It will close the file on destruction.
-class TempFile {
- public:
-  TempFile() : file_(std::tmpfile()) {}
-  ~TempFile() { std::fclose(file_); }
-
-  std::FILE* file() const { return file_; }
-
-  // Read the file into a string.
-  std::string ReadFile() {
-    std::fseek(file_, 0, SEEK_END);
-    int size = std::ftell(file_);
-    EXPECT_GT(size, 0);
-    std::rewind(file_);
-    std::string str(2 * size, ' ');
-    int read_bytes = std::fread(&str[0], 1, str.size(), file_);
-    EXPECT_EQ(read_bytes, size);
-    str.resize(read_bytes);
-    EXPECT_TRUE(std::feof(file_));
-    return str;
-  }
-
- private:
-  std::FILE* file_;
-};
-
-TEST_F(FormatEntryPointTest, FPrintF) {
-  TempFile tmp;
-  int result =
-      FPrintF(tmp.file(), "STRING: %s NUMBER: %010d", std::string("ABC"), -19);
-  EXPECT_EQ(result, 30);
-  EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
-}
-
-TEST_F(FormatEntryPointTest, FPrintFError) {
-  errno = 0;
-  int result = FPrintF(stdin, "ABC");
-  EXPECT_LT(result, 0);
-  EXPECT_EQ(errno, EBADF);
-}
-
-#ifdef __GLIBC__
-TEST_F(FormatEntryPointTest, FprintfTooLarge) {
-  std::FILE* f = std::fopen("/dev/null", "w");
-  int width = 2000000000;
-  errno = 0;
-  int result = FPrintF(f, "%*d %*d", width, 0, width, 0);
-  EXPECT_LT(result, 0);
-  EXPECT_EQ(errno, EFBIG);
-  std::fclose(f);
-}
-
-TEST_F(FormatEntryPointTest, PrintF) {
-  int stdout_tmp = dup(STDOUT_FILENO);
-
-  TempFile tmp;
-  std::fflush(stdout);
-  dup2(fileno(tmp.file()), STDOUT_FILENO);
-
-  int result = PrintF("STRING: %s NUMBER: %010d", std::string("ABC"), -19);
-
-  std::fflush(stdout);
-  dup2(stdout_tmp, STDOUT_FILENO);
-  close(stdout_tmp);
-
-  EXPECT_EQ(result, 30);
-  EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
-}
-#endif  // __GLIBC__
-
-TEST_F(FormatEntryPointTest, SNPrintF) {
-  char buffer[16];
-  int result =
-      SNPrintF(buffer, sizeof(buffer), "STRING: %s", std::string("ABC"));
-  EXPECT_EQ(result, 11);
-  EXPECT_EQ(std::string(buffer), "STRING: ABC");
-
-  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 123456);
-  EXPECT_EQ(result, 14);
-  EXPECT_EQ(std::string(buffer), "NUMBER: 123456");
-
-  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 1234567);
-  EXPECT_EQ(result, 15);
-  EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
-
-  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 12345678);
-  EXPECT_EQ(result, 16);
-  EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
-
-  result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 123456789);
-  EXPECT_EQ(result, 17);
-  EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
-
-  result = SNPrintF(nullptr, 0, "Just checking the %s of the output.", "size");
-  EXPECT_EQ(result, 37);
-}
-
-TEST(StrFormat, BehavesAsDocumented) {
-  std::string s = absl::StrFormat("%s, %d!", "Hello", 123);
-  EXPECT_EQ("Hello, 123!", s);
-  // The format of a replacement is
-  // '%'[position][flags][width['.'precision]][length_modifier][format]
-  EXPECT_EQ(absl::StrFormat("%1$+3.2Lf", 1.1), "+1.10");
-  // Text conversion:
-  //     "c" - Character.              Eg: 'a' -> "A", 20 -> " "
-  EXPECT_EQ(StrFormat("%c", 'a'), "a");
-  EXPECT_EQ(StrFormat("%c", 0x20), " ");
-  //           Formats char and integral types: int, long, uint64_t, etc.
-  EXPECT_EQ(StrFormat("%c", int{'a'}), "a");
-  EXPECT_EQ(StrFormat("%c", long{'a'}), "a");  // NOLINT
-  EXPECT_EQ(StrFormat("%c", uint64_t{'a'}), "a");
-  //     "s" - string       Eg: "C" -> "C", std::string("C++") -> "C++"
-  //           Formats std::string, char*, string_view, and Cord.
-  EXPECT_EQ(StrFormat("%s", "C"), "C");
-  EXPECT_EQ(StrFormat("%s", std::string("C++")), "C++");
-  EXPECT_EQ(StrFormat("%s", string_view("view")), "view");
-  EXPECT_EQ(StrFormat("%s", absl::Cord("cord")), "cord");
-  // Integral Conversion
-  //     These format integral types: char, int, long, uint64_t, etc.
-  EXPECT_EQ(StrFormat("%d", char{10}), "10");
-  EXPECT_EQ(StrFormat("%d", int{10}), "10");
-  EXPECT_EQ(StrFormat("%d", long{10}), "10");  // NOLINT
-  EXPECT_EQ(StrFormat("%d", uint64_t{10}), "10");
-  //     d,i - signed decimal          Eg: -10 -> "-10"
-  EXPECT_EQ(StrFormat("%d", -10), "-10");
-  EXPECT_EQ(StrFormat("%i", -10), "-10");
-  //      o  - octal                   Eg:  10 -> "12"
-  EXPECT_EQ(StrFormat("%o", 10), "12");
-  //      u  - unsigned decimal        Eg:  10 -> "10"
-  EXPECT_EQ(StrFormat("%u", 10), "10");
-  //     x/X - lower,upper case hex    Eg:  10 -> "a"/"A"
-  EXPECT_EQ(StrFormat("%x", 10), "a");
-  EXPECT_EQ(StrFormat("%X", 10), "A");
-  // Floating-point, with upper/lower-case output.
-  //     These format floating points types: float, double, long double, etc.
-  EXPECT_EQ(StrFormat("%.1f", float{1}), "1.0");
-  EXPECT_EQ(StrFormat("%.1f", double{1}), "1.0");
-  const long double long_double = 1.0;
-  EXPECT_EQ(StrFormat("%.1f", long_double), "1.0");
-  //     These also format integral types: char, int, long, uint64_t, etc.:
-  EXPECT_EQ(StrFormat("%.1f", char{1}), "1.0");
-  EXPECT_EQ(StrFormat("%.1f", int{1}), "1.0");
-  EXPECT_EQ(StrFormat("%.1f", long{1}), "1.0");  // NOLINT
-  EXPECT_EQ(StrFormat("%.1f", uint64_t{1}), "1.0");
-  //     f/F - decimal.                Eg: 123456789 -> "123456789.000000"
-  EXPECT_EQ(StrFormat("%f", 123456789), "123456789.000000");
-  EXPECT_EQ(StrFormat("%F", 123456789), "123456789.000000");
-  //     e/E - exponentiated           Eg: .01 -> "1.00000e-2"/"1.00000E-2"
-  EXPECT_EQ(StrFormat("%e", .01), "1.000000e-02");
-  EXPECT_EQ(StrFormat("%E", .01), "1.000000E-02");
-  //     g/G - exponentiate to fit     Eg: .01 -> "0.01", 1e10 ->"1e+10"/"1E+10"
-  EXPECT_EQ(StrFormat("%g", .01), "0.01");
-  EXPECT_EQ(StrFormat("%g", 1e10), "1e+10");
-  EXPECT_EQ(StrFormat("%G", 1e10), "1E+10");
-  //     a/A - lower,upper case hex    Eg: -3.0 -> "-0x1.8p+1"/"-0X1.8P+1"
-
-// On Android platform <=21, there is a regression in hexfloat formatting.
-#if !defined(__ANDROID_API__) || __ANDROID_API__ > 21
-  EXPECT_EQ(StrFormat("%.1a", -3.0), "-0x1.8p+1");  // .1 to fix MSVC output
-  EXPECT_EQ(StrFormat("%.1A", -3.0), "-0X1.8P+1");  // .1 to fix MSVC output
-#endif
-
-  // Other conversion
-  int64_t value = 0x7ffdeb4;
-  auto ptr_value = static_cast<uintptr_t>(value);
-  const int& something = *reinterpret_cast<const int*>(ptr_value);
-  EXPECT_EQ(StrFormat("%p", &something), StrFormat("0x%x", ptr_value));
-
-  // Output widths are supported, with optional flags.
-  EXPECT_EQ(StrFormat("%3d", 1), "  1");
-  EXPECT_EQ(StrFormat("%3d", 123456), "123456");
-  EXPECT_EQ(StrFormat("%06.2f", 1.234), "001.23");
-  EXPECT_EQ(StrFormat("%+d", 1), "+1");
-  EXPECT_EQ(StrFormat("% d", 1), " 1");
-  EXPECT_EQ(StrFormat("%-4d", -1), "-1  ");
-  EXPECT_EQ(StrFormat("%#o", 10), "012");
-  EXPECT_EQ(StrFormat("%#x", 15), "0xf");
-  EXPECT_EQ(StrFormat("%04d", 8), "0008");
-  // Posix positional substitution.
-  EXPECT_EQ(absl::StrFormat("%2$s, %3$s, %1$s!", "vici", "veni", "vidi"),
-            "veni, vidi, vici!");
-  // Length modifiers are ignored.
-  EXPECT_EQ(StrFormat("%hhd", int{1}), "1");
-  EXPECT_EQ(StrFormat("%hd", int{1}), "1");
-  EXPECT_EQ(StrFormat("%ld", int{1}), "1");
-  EXPECT_EQ(StrFormat("%lld", int{1}), "1");
-  EXPECT_EQ(StrFormat("%Ld", int{1}), "1");
-  EXPECT_EQ(StrFormat("%jd", int{1}), "1");
-  EXPECT_EQ(StrFormat("%zd", int{1}), "1");
-  EXPECT_EQ(StrFormat("%td", int{1}), "1");
-  EXPECT_EQ(StrFormat("%qd", int{1}), "1");
-}
-
-using str_format_internal::ExtendedParsedFormat;
-using str_format_internal::ParsedFormatBase;
-
-struct SummarizeConsumer {
-  std::string* out;
-  explicit SummarizeConsumer(std::string* out) : out(out) {}
-
-  bool Append(string_view s) {
-    *out += "[" + std::string(s) + "]";
-    return true;
-  }
-
-  bool ConvertOne(const str_format_internal::UnboundConversion& conv,
-                  string_view s) {
-    *out += "{";
-    *out += std::string(s);
-    *out += ":";
-    *out += std::to_string(conv.arg_position) + "$";
-    if (conv.width.is_from_arg()) {
-      *out += std::to_string(conv.width.get_from_arg()) + "$*";
-    }
-    if (conv.precision.is_from_arg()) {
-      *out += "." + std::to_string(conv.precision.get_from_arg()) + "$*";
-    }
-    *out += str_format_internal::FormatConversionCharToChar(conv.conv);
-    *out += "}";
-    return true;
-  }
-};
-
-std::string SummarizeParsedFormat(const ParsedFormatBase& pc) {
-  std::string out;
-  if (!pc.ProcessFormat(SummarizeConsumer(&out))) out += "!";
-  return out;
-}
-
-using ParsedFormatTest = ::testing::Test;
-
-TEST_F(ParsedFormatTest, SimpleChecked) {
-  EXPECT_EQ("[ABC]{d:1$d}[DEF]",
-            SummarizeParsedFormat(ParsedFormat<'d'>("ABC%dDEF")));
-  EXPECT_EQ("{s:1$s}[FFF]{d:2$d}[ZZZ]{f:3$f}",
-            SummarizeParsedFormat(ParsedFormat<'s', 'd', 'f'>("%sFFF%dZZZ%f")));
-  EXPECT_EQ("{s:1$s}[ ]{.*d:3$.2$*d}",
-            SummarizeParsedFormat(ParsedFormat<'s', '*', 'd'>("%s %.*d")));
-}
-
-TEST_F(ParsedFormatTest, SimpleUncheckedCorrect) {
-  auto f = ParsedFormat<'d'>::New("ABC%dDEF");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("[ABC]{d:1$d}[DEF]", SummarizeParsedFormat(*f));
-
-  std::string format = "%sFFF%dZZZ%f";
-  auto f2 = ParsedFormat<'s', 'd', 'f'>::New(format);
-
-  ASSERT_TRUE(f2);
-  EXPECT_EQ("{s:1$s}[FFF]{d:2$d}[ZZZ]{f:3$f}", SummarizeParsedFormat(*f2));
-
-  f2 = ParsedFormat<'s', 'd', 'f'>::New("%s %d %f");
-
-  ASSERT_TRUE(f2);
-  EXPECT_EQ("{s:1$s}[ ]{d:2$d}[ ]{f:3$f}", SummarizeParsedFormat(*f2));
-
-  auto star = ParsedFormat<'*', 'd'>::New("%*d");
-  ASSERT_TRUE(star);
-  EXPECT_EQ("{*d:2$1$*d}", SummarizeParsedFormat(*star));
-
-  auto dollar = ParsedFormat<'d', 's'>::New("%2$s %1$d");
-  ASSERT_TRUE(dollar);
-  EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}", SummarizeParsedFormat(*dollar));
-  // with reuse
-  dollar = ParsedFormat<'d', 's'>::New("%2$s %1$d %1$d");
-  ASSERT_TRUE(dollar);
-  EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}[ ]{1$d:1$d}",
-            SummarizeParsedFormat(*dollar));
-}
-
-TEST_F(ParsedFormatTest, SimpleUncheckedIgnoredArgs) {
-  EXPECT_FALSE((ParsedFormat<'d', 's'>::New("ABC")));
-  EXPECT_FALSE((ParsedFormat<'d', 's'>::New("%dABC")));
-  EXPECT_FALSE((ParsedFormat<'d', 's'>::New("ABC%2$s")));
-  auto f = ParsedFormat<'d', 's'>::NewAllowIgnored("ABC");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("[ABC]", SummarizeParsedFormat(*f));
-  f = ParsedFormat<'d', 's'>::NewAllowIgnored("%dABC");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("{d:1$d}[ABC]", SummarizeParsedFormat(*f));
-  f = ParsedFormat<'d', 's'>::NewAllowIgnored("ABC%2$s");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("[ABC]{2$s:2$s}", SummarizeParsedFormat(*f));
-}
-
-TEST_F(ParsedFormatTest, SimpleUncheckedUnsupported) {
-  EXPECT_FALSE(ParsedFormat<'d'>::New("%1$d %1$x"));
-  EXPECT_FALSE(ParsedFormat<'x'>::New("%1$d %1$x"));
-}
-
-TEST_F(ParsedFormatTest, SimpleUncheckedIncorrect) {
-  EXPECT_FALSE(ParsedFormat<'d'>::New(""));
-
-  EXPECT_FALSE(ParsedFormat<'d'>::New("ABC%dDEF%d"));
-
-  std::string format = "%sFFF%dZZZ%f";
-  EXPECT_FALSE((ParsedFormat<'s', 'd', 'g'>::New(format)));
-}
-
-#if defined(__cpp_nontype_template_parameter_auto)
-
-template <auto T>
-std::true_type IsValidParsedFormatArgTest(ParsedFormat<T>*);
-
-template <auto T>
-std::false_type IsValidParsedFormatArgTest(...);
-
-template <auto T>
-using IsValidParsedFormatArg = decltype(IsValidParsedFormatArgTest<T>(nullptr));
-
-TEST_F(ParsedFormatTest, OnlyValidTypesAllowed) {
-  ASSERT_TRUE(IsValidParsedFormatArg<'c'>::value);
-
-  ASSERT_TRUE(IsValidParsedFormatArg<FormatConversionCharSet::d>::value);
-
-  ASSERT_TRUE(IsValidParsedFormatArg<absl::FormatConversionCharSet::d |
-                                     absl::FormatConversionCharSet::x>::value);
-  ASSERT_TRUE(
-      IsValidParsedFormatArg<absl::FormatConversionCharSet::kIntegral>::value);
-
-  // This is an easy mistake to make, however, this will reduce to an integer
-  // which has no meaning, so we need to ensure it doesn't compile.
-  ASSERT_FALSE(IsValidParsedFormatArg<'x' | 'd'>::value);
-
-  // For now, we disallow construction based on ConversionChar (rather than
-  // CharSet)
-  ASSERT_FALSE(IsValidParsedFormatArg<absl::FormatConversionChar::d>::value);
-}
-
-TEST_F(ParsedFormatTest, ExtendedTyping) {
-  EXPECT_FALSE(ParsedFormat<FormatConversionCharSet::d>::New(""));
-  ASSERT_TRUE(ParsedFormat<absl::FormatConversionCharSet::d>::New("%d"));
-  auto v1 = ParsedFormat<'d', absl::FormatConversionCharSet::s>::New("%d%s");
-  ASSERT_TRUE(v1);
-  auto v2 = ParsedFormat<absl::FormatConversionCharSet::d, 's'>::New("%d%s");
-  ASSERT_TRUE(v2);
-  auto v3 = ParsedFormat<absl::FormatConversionCharSet::d |
-                             absl::FormatConversionCharSet::s,
-                         's'>::New("%d%s");
-  ASSERT_TRUE(v3);
-  auto v4 = ParsedFormat<absl::FormatConversionCharSet::d |
-                             absl::FormatConversionCharSet::s,
-                         's'>::New("%s%s");
-  ASSERT_TRUE(v4);
-}
-#endif
-
-TEST_F(ParsedFormatTest, UncheckedCorrect) {
-  auto f =
-      ExtendedParsedFormat<absl::FormatConversionCharSet::d>::New("ABC%dDEF");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("[ABC]{d:1$d}[DEF]", SummarizeParsedFormat(*f));
-
-  std::string format = "%sFFF%dZZZ%f";
-  auto f2 = ExtendedParsedFormat<
-      absl::FormatConversionCharSet::kString, absl::FormatConversionCharSet::d,
-      absl::FormatConversionCharSet::kFloating>::New(format);
-
-  ASSERT_TRUE(f2);
-  EXPECT_EQ("{s:1$s}[FFF]{d:2$d}[ZZZ]{f:3$f}", SummarizeParsedFormat(*f2));
-
-  f2 = ExtendedParsedFormat<
-      absl::FormatConversionCharSet::kString, absl::FormatConversionCharSet::d,
-      absl::FormatConversionCharSet::kFloating>::New("%s %d %f");
-
-  ASSERT_TRUE(f2);
-  EXPECT_EQ("{s:1$s}[ ]{d:2$d}[ ]{f:3$f}", SummarizeParsedFormat(*f2));
-
-  auto star =
-      ExtendedParsedFormat<absl::FormatConversionCharSet::kStar,
-                           absl::FormatConversionCharSet::d>::New("%*d");
-  ASSERT_TRUE(star);
-  EXPECT_EQ("{*d:2$1$*d}", SummarizeParsedFormat(*star));
-
-  auto dollar =
-      ExtendedParsedFormat<absl::FormatConversionCharSet::d,
-                           absl::FormatConversionCharSet::s>::New("%2$s %1$d");
-  ASSERT_TRUE(dollar);
-  EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}", SummarizeParsedFormat(*dollar));
-  // with reuse
-  dollar = ExtendedParsedFormat<
-      absl::FormatConversionCharSet::d,
-      absl::FormatConversionCharSet::s>::New("%2$s %1$d %1$d");
-  ASSERT_TRUE(dollar);
-  EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}[ ]{1$d:1$d}",
-            SummarizeParsedFormat(*dollar));
-}
-
-TEST_F(ParsedFormatTest, UncheckedIgnoredArgs) {
-  EXPECT_FALSE(
-      (ExtendedParsedFormat<absl::FormatConversionCharSet::d,
-                            absl::FormatConversionCharSet::s>::New("ABC")));
-  EXPECT_FALSE(
-      (ExtendedParsedFormat<absl::FormatConversionCharSet::d,
-                            absl::FormatConversionCharSet::s>::New("%dABC")));
-  EXPECT_FALSE(
-      (ExtendedParsedFormat<absl::FormatConversionCharSet::d,
-                            absl::FormatConversionCharSet::s>::New("ABC%2$s")));
-  auto f = ExtendedParsedFormat<
-      absl::FormatConversionCharSet::d,
-      absl::FormatConversionCharSet::s>::NewAllowIgnored("ABC");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("[ABC]", SummarizeParsedFormat(*f));
-  f = ExtendedParsedFormat<
-      absl::FormatConversionCharSet::d,
-      absl::FormatConversionCharSet::s>::NewAllowIgnored("%dABC");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("{d:1$d}[ABC]", SummarizeParsedFormat(*f));
-  f = ExtendedParsedFormat<
-      absl::FormatConversionCharSet::d,
-      absl::FormatConversionCharSet::s>::NewAllowIgnored("ABC%2$s");
-  ASSERT_TRUE(f);
-  EXPECT_EQ("[ABC]{2$s:2$s}", SummarizeParsedFormat(*f));
-}
-
-TEST_F(ParsedFormatTest, UncheckedMultipleTypes) {
-  auto dx =
-      ExtendedParsedFormat<absl::FormatConversionCharSet::d |
-                           absl::FormatConversionCharSet::x>::New("%1$d %1$x");
-  EXPECT_TRUE(dx);
-  EXPECT_EQ("{1$d:1$d}[ ]{1$x:1$x}", SummarizeParsedFormat(*dx));
-
-  dx = ExtendedParsedFormat<absl::FormatConversionCharSet::d |
-                            absl::FormatConversionCharSet::x>::New("%1$d");
-  EXPECT_TRUE(dx);
-  EXPECT_EQ("{1$d:1$d}", SummarizeParsedFormat(*dx));
-}
-
-TEST_F(ParsedFormatTest, UncheckedIncorrect) {
-  EXPECT_FALSE(ExtendedParsedFormat<absl::FormatConversionCharSet::d>::New(""));
-
-  EXPECT_FALSE(ExtendedParsedFormat<absl::FormatConversionCharSet::d>::New(
-      "ABC%dDEF%d"));
-
-  std::string format = "%sFFF%dZZZ%f";
-  EXPECT_FALSE(
-      (ExtendedParsedFormat<absl::FormatConversionCharSet::s,
-                            absl::FormatConversionCharSet::d,
-                            absl::FormatConversionCharSet::g>::New(format)));
-}
-
-TEST_F(ParsedFormatTest, RegressionMixPositional) {
-  EXPECT_FALSE(
-      (ExtendedParsedFormat<absl::FormatConversionCharSet::d,
-                            absl::FormatConversionCharSet::o>::New("%1$d %o")));
-}
-
-using FormatWrapperTest = ::testing::Test;
-
-// Plain wrapper for StrFormat.
-template <typename... Args>
-std::string WrappedFormat(const absl::FormatSpec<Args...>& format,
-                          const Args&... args) {
-  return StrFormat(format, args...);
-}
-
-TEST_F(FormatWrapperTest, ConstexprStringFormat) {
-  EXPECT_EQ(WrappedFormat("%s there", "hello"), "hello there");
-}
-
-TEST_F(FormatWrapperTest, ParsedFormat) {
-  ParsedFormat<'s'> format("%s there");
-  EXPECT_EQ(WrappedFormat(format, "hello"), "hello there");
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-using FormatExtensionTest = ::testing::Test;
-
-struct Point {
-  friend absl::FormatConvertResult<absl::FormatConversionCharSet::kString |
-                                   absl::FormatConversionCharSet::kIntegral>
-  AbslFormatConvert(const Point& p, const absl::FormatConversionSpec& spec,
-                    absl::FormatSink* s) {
-    if (spec.conversion_char() == absl::FormatConversionChar::s) {
-      s->Append(absl::StrCat("x=", p.x, " y=", p.y));
-    } else {
-      s->Append(absl::StrCat(p.x, ",", p.y));
-    }
-    return {true};
-  }
-
-  int x = 10;
-  int y = 20;
-};
-
-TEST_F(FormatExtensionTest, AbslFormatConvertExample) {
-  Point p;
-  EXPECT_EQ(absl::StrFormat("a %s z", p), "a x=10 y=20 z");
-  EXPECT_EQ(absl::StrFormat("a %d z", p), "a 10,20 z");
-
-  // Typed formatting will fail to compile an invalid format.
-  // StrFormat("%f", p);  // Does not compile.
-  std::string actual;
-  absl::UntypedFormatSpec f1("%f");
-  // FormatUntyped will return false for bad character.
-  EXPECT_FALSE(absl::FormatUntyped(&actual, f1, {absl::FormatArg(p)}));
-}
-
-// Some codegen thunks that we can use to easily dump the generated assembly for
-// different StrFormat calls.
-
-std::string CodegenAbslStrFormatInt(int i) {  // NOLINT
-  return absl::StrFormat("%d", i);
-}
-
-std::string CodegenAbslStrFormatIntStringInt64(int i, const std::string& s,
-                                               int64_t i64) {  // NOLINT
-  return absl::StrFormat("%d %s %d", i, s, i64);
-}
-
-void CodegenAbslStrAppendFormatInt(std::string* out, int i) {  // NOLINT
-  absl::StrAppendFormat(out, "%d", i);
-}
-
-void CodegenAbslStrAppendFormatIntStringInt64(std::string* out, int i,
-                                              const std::string& s,
-                                              int64_t i64) {  // NOLINT
-  absl::StrAppendFormat(out, "%d %s %d", i, s, i64);
-}
diff --git a/third_party/abseil/absl/strings/str_join.h b/third_party/abseil/absl/strings/str_join.h
deleted file mode 100644
index ae5731a..0000000
--- a/third_party/abseil/absl/strings/str_join.h
+++ /dev/null
@@ -1,293 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: str_join.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains functions for joining a range of elements and
-// returning the result as a std::string. StrJoin operations are specified by
-// passing a range, a separator string to use between the elements joined, and
-// an optional Formatter responsible for converting each argument in the range
-// to a string. If omitted, a default `AlphaNumFormatter()` is called on the
-// elements to be joined, using the same formatting that `absl::StrCat()` uses.
-// This package defines a number of default formatters, and you can define your
-// own implementations.
-//
-// Ranges are specified by passing a container with `std::begin()` and
-// `std::end()` iterators, container-specific `begin()` and `end()` iterators, a
-// brace-initialized `std::initializer_list`, or a `std::tuple` of heterogeneous
-// objects. The separator string is specified as an `absl::string_view`.
-//
-// Because the default formatter uses the `absl::AlphaNum` class,
-// `absl::StrJoin()`, like `absl::StrCat()`, will work out-of-the-box on
-// collections of strings, ints, floats, doubles, etc.
-//
-// Example:
-//
-//   std::vector<std::string> v = {"foo", "bar", "baz"};
-//   std::string s = absl::StrJoin(v, "-");
-//   EXPECT_EQ("foo-bar-baz", s);
-//
-// See comments on the `absl::StrJoin()` function for more examples.
-
-#ifndef ABSL_STRINGS_STR_JOIN_H_
-#define ABSL_STRINGS_STR_JOIN_H_
-
-#include <cstdio>
-#include <cstring>
-#include <initializer_list>
-#include <iterator>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/macros.h"
-#include "absl/strings/internal/str_join_internal.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// Concept: Formatter
-// -----------------------------------------------------------------------------
-//
-// A Formatter is a function object that is responsible for formatting its
-// argument as a string and appending it to a given output std::string.
-// Formatters may be implemented as function objects, lambdas, or normal
-// functions. You may provide your own Formatter to enable `absl::StrJoin()` to
-// work with arbitrary types.
-//
-// The following is an example of a custom Formatter that simply uses
-// `std::to_string()` to format an integer as a std::string.
-//
-//   struct MyFormatter {
-//     void operator()(std::string* out, int i) const {
-//       out->append(std::to_string(i));
-//     }
-//   };
-//
-// You would use the above formatter by passing an instance of it as the final
-// argument to `absl::StrJoin()`:
-//
-//   std::vector<int> v = {1, 2, 3, 4};
-//   std::string s = absl::StrJoin(v, "-", MyFormatter());
-//   EXPECT_EQ("1-2-3-4", s);
-//
-// The following standard formatters are provided within this file:
-//
-// - `AlphaNumFormatter()` (the default)
-// - `StreamFormatter()`
-// - `PairFormatter()`
-// - `DereferenceFormatter()`
-
-// AlphaNumFormatter()
-//
-// Default formatter used if none is specified. Uses `absl::AlphaNum` to convert
-// numeric arguments to strings.
-inline strings_internal::AlphaNumFormatterImpl AlphaNumFormatter() {
-  return strings_internal::AlphaNumFormatterImpl();
-}
-
-// StreamFormatter()
-//
-// Formats its argument using the << operator.
-inline strings_internal::StreamFormatterImpl StreamFormatter() {
-  return strings_internal::StreamFormatterImpl();
-}
-
-// Function Template: PairFormatter(Formatter, absl::string_view, Formatter)
-//
-// Formats a `std::pair` by putting a given separator between the pair's
-// `.first` and `.second` members. This formatter allows you to specify
-// custom Formatters for both the first and second member of each pair.
-template <typename FirstFormatter, typename SecondFormatter>
-inline strings_internal::PairFormatterImpl<FirstFormatter, SecondFormatter>
-PairFormatter(FirstFormatter f1, absl::string_view sep, SecondFormatter f2) {
-  return strings_internal::PairFormatterImpl<FirstFormatter, SecondFormatter>(
-      std::move(f1), sep, std::move(f2));
-}
-
-// Function overload of PairFormatter() for using a default
-// `AlphaNumFormatter()` for each Formatter in the pair.
-inline strings_internal::PairFormatterImpl<
-    strings_internal::AlphaNumFormatterImpl,
-    strings_internal::AlphaNumFormatterImpl>
-PairFormatter(absl::string_view sep) {
-  return PairFormatter(AlphaNumFormatter(), sep, AlphaNumFormatter());
-}
-
-// Function Template: DereferenceFormatter(Formatter)
-//
-// Formats its argument by dereferencing it and then applying the given
-// formatter. This formatter is useful for formatting a container of
-// pointer-to-T. This pattern often shows up when joining repeated fields in
-// protocol buffers.
-template <typename Formatter>
-strings_internal::DereferenceFormatterImpl<Formatter> DereferenceFormatter(
-    Formatter&& f) {
-  return strings_internal::DereferenceFormatterImpl<Formatter>(
-      std::forward<Formatter>(f));
-}
-
-// Function overload of `DererefenceFormatter()` for using a default
-// `AlphaNumFormatter()`.
-inline strings_internal::DereferenceFormatterImpl<
-    strings_internal::AlphaNumFormatterImpl>
-DereferenceFormatter() {
-  return strings_internal::DereferenceFormatterImpl<
-      strings_internal::AlphaNumFormatterImpl>(AlphaNumFormatter());
-}
-
-// -----------------------------------------------------------------------------
-// StrJoin()
-// -----------------------------------------------------------------------------
-//
-// Joins a range of elements and returns the result as a std::string.
-// `absl::StrJoin()` takes a range, a separator string to use between the
-// elements joined, and an optional Formatter responsible for converting each
-// argument in the range to a string.
-//
-// If omitted, the default `AlphaNumFormatter()` is called on the elements to be
-// joined.
-//
-// Example 1:
-//   // Joins a collection of strings. This pattern also works with a collection
-//   // of `absl::string_view` or even `const char*`.
-//   std::vector<std::string> v = {"foo", "bar", "baz"};
-//   std::string s = absl::StrJoin(v, "-");
-//   EXPECT_EQ("foo-bar-baz", s);
-//
-// Example 2:
-//   // Joins the values in the given `std::initializer_list<>` specified using
-//   // brace initialization. This pattern also works with an initializer_list
-//   // of ints or `absl::string_view` -- any `AlphaNum`-compatible type.
-//   std::string s = absl::StrJoin({"foo", "bar", "baz"}, "-");
-//   EXPECT_EQ("foo-bar-baz", s);
-//
-// Example 3:
-//   // Joins a collection of ints. This pattern also works with floats,
-//   // doubles, int64s -- any `StrCat()`-compatible type.
-//   std::vector<int> v = {1, 2, 3, -4};
-//   std::string s = absl::StrJoin(v, "-");
-//   EXPECT_EQ("1-2-3--4", s);
-//
-// Example 4:
-//   // Joins a collection of pointer-to-int. By default, pointers are
-//   // dereferenced and the pointee is formatted using the default format for
-//   // that type; such dereferencing occurs for all levels of indirection, so
-//   // this pattern works just as well for `std::vector<int**>` as for
-//   // `std::vector<int*>`.
-//   int x = 1, y = 2, z = 3;
-//   std::vector<int*> v = {&x, &y, &z};
-//   std::string s = absl::StrJoin(v, "-");
-//   EXPECT_EQ("1-2-3", s);
-//
-// Example 5:
-//   // Dereferencing of `std::unique_ptr<>` is also supported:
-//   std::vector<std::unique_ptr<int>> v
-//   v.emplace_back(new int(1));
-//   v.emplace_back(new int(2));
-//   v.emplace_back(new int(3));
-//   std::string s = absl::StrJoin(v, "-");
-//   EXPECT_EQ("1-2-3", s);
-//
-// Example 6:
-//   // Joins a `std::map`, with each key-value pair separated by an equals
-//   // sign. This pattern would also work with, say, a
-//   // `std::vector<std::pair<>>`.
-//   std::map<std::string, int> m = {
-//       std::make_pair("a", 1),
-//       std::make_pair("b", 2),
-//       std::make_pair("c", 3)};
-//   std::string s = absl::StrJoin(m, ",", absl::PairFormatter("="));
-//   EXPECT_EQ("a=1,b=2,c=3", s);
-//
-// Example 7:
-//   // These examples show how `absl::StrJoin()` handles a few common edge
-//   // cases:
-//   std::vector<std::string> v_empty;
-//   EXPECT_EQ("", absl::StrJoin(v_empty, "-"));
-//
-//   std::vector<std::string> v_one_item = {"foo"};
-//   EXPECT_EQ("foo", absl::StrJoin(v_one_item, "-"));
-//
-//   std::vector<std::string> v_empty_string = {""};
-//   EXPECT_EQ("", absl::StrJoin(v_empty_string, "-"));
-//
-//   std::vector<std::string> v_one_item_empty_string = {"a", ""};
-//   EXPECT_EQ("a-", absl::StrJoin(v_one_item_empty_string, "-"));
-//
-//   std::vector<std::string> v_two_empty_string = {"", ""};
-//   EXPECT_EQ("-", absl::StrJoin(v_two_empty_string, "-"));
-//
-// Example 8:
-//   // Joins a `std::tuple<T...>` of heterogeneous types, converting each to
-//   // a std::string using the `absl::AlphaNum` class.
-//   std::string s = absl::StrJoin(std::make_tuple(123, "abc", 0.456), "-");
-//   EXPECT_EQ("123-abc-0.456", s);
-
-template <typename Iterator, typename Formatter>
-std::string StrJoin(Iterator start, Iterator end, absl::string_view sep,
-                    Formatter&& fmt) {
-  return strings_internal::JoinAlgorithm(start, end, sep, fmt);
-}
-
-template <typename Range, typename Formatter>
-std::string StrJoin(const Range& range, absl::string_view separator,
-                    Formatter&& fmt) {
-  return strings_internal::JoinRange(range, separator, fmt);
-}
-
-template <typename T, typename Formatter>
-std::string StrJoin(std::initializer_list<T> il, absl::string_view separator,
-                    Formatter&& fmt) {
-  return strings_internal::JoinRange(il, separator, fmt);
-}
-
-template <typename... T, typename Formatter>
-std::string StrJoin(const std::tuple<T...>& value, absl::string_view separator,
-                    Formatter&& fmt) {
-  return strings_internal::JoinAlgorithm(value, separator, fmt);
-}
-
-template <typename Iterator>
-std::string StrJoin(Iterator start, Iterator end, absl::string_view separator) {
-  return strings_internal::JoinRange(start, end, separator);
-}
-
-template <typename Range>
-std::string StrJoin(const Range& range, absl::string_view separator) {
-  return strings_internal::JoinRange(range, separator);
-}
-
-template <typename T>
-std::string StrJoin(std::initializer_list<T> il,
-                    absl::string_view separator) {
-  return strings_internal::JoinRange(il, separator);
-}
-
-template <typename... T>
-std::string StrJoin(const std::tuple<T...>& value,
-                    absl::string_view separator) {
-  return strings_internal::JoinAlgorithm(value, separator, AlphaNumFormatter());
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STR_JOIN_H_
diff --git a/third_party/abseil/absl/strings/str_join_benchmark.cc b/third_party/abseil/absl/strings/str_join_benchmark.cc
deleted file mode 100644
index d6f689f..0000000
--- a/third_party/abseil/absl/strings/str_join_benchmark.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-//
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_join.h"
-
-#include <string>
-#include <vector>
-#include <utility>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-void BM_Join2_Strings(benchmark::State& state) {
-  const int string_len = state.range(0);
-  const int num_strings = state.range(1);
-  const std::string s(string_len, 'x');
-  const std::vector<std::string> v(num_strings, s);
-  for (auto _ : state) {
-    std::string s = absl::StrJoin(v, "-");
-    benchmark::DoNotOptimize(s);
-  }
-}
-BENCHMARK(BM_Join2_Strings)
-    ->ArgPair(1 << 0, 1 << 3)
-    ->ArgPair(1 << 10, 1 << 3)
-    ->ArgPair(1 << 13, 1 << 3)
-    ->ArgPair(1 << 0, 1 << 10)
-    ->ArgPair(1 << 10, 1 << 10)
-    ->ArgPair(1 << 13, 1 << 10)
-    ->ArgPair(1 << 0, 1 << 13)
-    ->ArgPair(1 << 10, 1 << 13)
-    ->ArgPair(1 << 13, 1 << 13);
-
-void BM_Join2_Ints(benchmark::State& state) {
-  const int num_ints = state.range(0);
-  const std::vector<int> v(num_ints, 42);
-  for (auto _ : state) {
-    std::string s = absl::StrJoin(v, "-");
-    benchmark::DoNotOptimize(s);
-  }
-}
-BENCHMARK(BM_Join2_Ints)->Range(0, 1 << 13);
-
-void BM_Join2_KeysAndValues(benchmark::State& state) {
-  const int string_len = state.range(0);
-  const int num_pairs = state.range(1);
-  const std::string s(string_len, 'x');
-  const std::vector<std::pair<std::string, int>> v(num_pairs,
-                                                   std::make_pair(s, 42));
-  for (auto _ : state) {
-    std::string s = absl::StrJoin(v, ",", absl::PairFormatter("="));
-    benchmark::DoNotOptimize(s);
-  }
-}
-BENCHMARK(BM_Join2_KeysAndValues)
-    ->ArgPair(1 << 0, 1 << 3)
-    ->ArgPair(1 << 10, 1 << 3)
-    ->ArgPair(1 << 13, 1 << 3)
-    ->ArgPair(1 << 0, 1 << 10)
-    ->ArgPair(1 << 10, 1 << 10)
-    ->ArgPair(1 << 13, 1 << 10)
-    ->ArgPair(1 << 0, 1 << 13)
-    ->ArgPair(1 << 10, 1 << 13)
-    ->ArgPair(1 << 13, 1 << 13);
-
-void BM_JoinStreamable(benchmark::State& state) {
-  const int string_len = state.range(0);
-  const int num_strings = state.range(1);
-  const std::vector<std::string> v(num_strings, std::string(string_len, 'x'));
-  for (auto _ : state) {
-    std::string s = absl::StrJoin(v, "", absl::StreamFormatter());
-    benchmark::DoNotOptimize(s);
-  }
-}
-BENCHMARK(BM_JoinStreamable)
-    ->ArgPair(0, 0)
-    ->ArgPair(16, 1)
-    ->ArgPair(256, 1)
-    ->ArgPair(16, 16)
-    ->ArgPair(256, 16)
-    ->ArgPair(16, 256)
-    ->ArgPair(256, 256);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_join_test.cc b/third_party/abseil/absl/strings/str_join_test.cc
deleted file mode 100644
index 2be6256..0000000
--- a/third_party/abseil/absl/strings/str_join_test.cc
+++ /dev/null
@@ -1,474 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Unit tests for all join.h functions
-
-#include "absl/strings/str_join.h"
-
-#include <cstddef>
-#include <cstdint>
-#include <cstdio>
-#include <functional>
-#include <initializer_list>
-#include <map>
-#include <memory>
-#include <ostream>
-#include <tuple>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/macros.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-
-namespace {
-
-TEST(StrJoin, APIExamples) {
-  {
-    // Collection of strings
-    std::vector<std::string> v = {"foo", "bar", "baz"};
-    EXPECT_EQ("foo-bar-baz", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Collection of absl::string_view
-    std::vector<absl::string_view> v = {"foo", "bar", "baz"};
-    EXPECT_EQ("foo-bar-baz", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Collection of const char*
-    std::vector<const char*> v = {"foo", "bar", "baz"};
-    EXPECT_EQ("foo-bar-baz", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Collection of non-const char*
-    std::string a = "foo", b = "bar", c = "baz";
-    std::vector<char*> v = {&a[0], &b[0], &c[0]};
-    EXPECT_EQ("foo-bar-baz", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Collection of ints
-    std::vector<int> v = {1, 2, 3, -4};
-    EXPECT_EQ("1-2-3--4", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Literals passed as a std::initializer_list
-    std::string s = absl::StrJoin({"a", "b", "c"}, "-");
-    EXPECT_EQ("a-b-c", s);
-  }
-  {
-    // Join a std::tuple<T...>.
-    std::string s = absl::StrJoin(std::make_tuple(123, "abc", 0.456), "-");
-    EXPECT_EQ("123-abc-0.456", s);
-  }
-
-  {
-    // Collection of unique_ptrs
-    std::vector<std::unique_ptr<int>> v;
-    v.emplace_back(new int(1));
-    v.emplace_back(new int(2));
-    v.emplace_back(new int(3));
-    EXPECT_EQ("1-2-3", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Array of ints
-    const int a[] = {1, 2, 3, -4};
-    EXPECT_EQ("1-2-3--4", absl::StrJoin(a, a + ABSL_ARRAYSIZE(a), "-"));
-  }
-
-  {
-    // Collection of pointers
-    int x = 1, y = 2, z = 3;
-    std::vector<int*> v = {&x, &y, &z};
-    EXPECT_EQ("1-2-3", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Collection of pointers to pointers
-    int x = 1, y = 2, z = 3;
-    int *px = &x, *py = &y, *pz = &z;
-    std::vector<int**> v = {&px, &py, &pz};
-    EXPECT_EQ("1-2-3", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // Collection of pointers to std::string
-    std::string a("a"), b("b");
-    std::vector<std::string*> v = {&a, &b};
-    EXPECT_EQ("a-b", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // A std::map, which is a collection of std::pair<>s.
-    std::map<std::string, int> m = {{"a", 1}, {"b", 2}, {"c", 3}};
-    EXPECT_EQ("a=1,b=2,c=3", absl::StrJoin(m, ",", absl::PairFormatter("=")));
-  }
-
-  {
-    // Shows absl::StrSplit and absl::StrJoin working together. This example is
-    // equivalent to s/=/-/g.
-    const std::string s = "a=b=c=d";
-    EXPECT_EQ("a-b-c-d", absl::StrJoin(absl::StrSplit(s, "="), "-"));
-  }
-
-  //
-  // A few examples of edge cases
-  //
-
-  {
-    // Empty range yields an empty string.
-    std::vector<std::string> v;
-    EXPECT_EQ("", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // A range of 1 element gives a string with that element but no
-    // separator.
-    std::vector<std::string> v = {"foo"};
-    EXPECT_EQ("foo", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // A range with a single empty string element
-    std::vector<std::string> v = {""};
-    EXPECT_EQ("", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // A range with 2 elements, one of which is an empty string
-    std::vector<std::string> v = {"a", ""};
-    EXPECT_EQ("a-", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // A range with 2 empty elements.
-    std::vector<std::string> v = {"", ""};
-    EXPECT_EQ("-", absl::StrJoin(v, "-"));
-  }
-
-  {
-    // A std::vector of bool.
-    std::vector<bool> v = {true, false, true};
-    EXPECT_EQ("1-0-1", absl::StrJoin(v, "-"));
-  }
-}
-
-TEST(StrJoin, CustomFormatter) {
-  std::vector<std::string> v{"One", "Two", "Three"};
-  {
-    std::string joined =
-        absl::StrJoin(v, "", [](std::string* out, const std::string& in) {
-          absl::StrAppend(out, "(", in, ")");
-        });
-    EXPECT_EQ("(One)(Two)(Three)", joined);
-  }
-  {
-    class ImmovableFormatter {
-     public:
-      void operator()(std::string* out, const std::string& in) {
-        absl::StrAppend(out, "(", in, ")");
-      }
-      ImmovableFormatter() {}
-      ImmovableFormatter(const ImmovableFormatter&) = delete;
-    };
-    EXPECT_EQ("(One)(Two)(Three)", absl::StrJoin(v, "", ImmovableFormatter()));
-  }
-  {
-    class OverloadedFormatter {
-     public:
-      void operator()(std::string* out, const std::string& in) {
-        absl::StrAppend(out, "(", in, ")");
-      }
-      void operator()(std::string* out, const std::string& in) const {
-        absl::StrAppend(out, "[", in, "]");
-      }
-    };
-    EXPECT_EQ("(One)(Two)(Three)", absl::StrJoin(v, "", OverloadedFormatter()));
-    const OverloadedFormatter fmt = {};
-    EXPECT_EQ("[One][Two][Three]", absl::StrJoin(v, "", fmt));
-  }
-}
-
-//
-// Tests the Formatters
-//
-
-TEST(AlphaNumFormatter, FormatterAPI) {
-  // Not an exhaustive test. See strings/strcat_test.h for the exhaustive test
-  // of what AlphaNum can convert.
-  auto f = absl::AlphaNumFormatter();
-  std::string s;
-  f(&s, "Testing: ");
-  f(&s, static_cast<int>(1));
-  f(&s, static_cast<int16_t>(2));
-  f(&s, static_cast<int64_t>(3));
-  f(&s, static_cast<float>(4));
-  f(&s, static_cast<double>(5));
-  f(&s, static_cast<unsigned>(6));
-  f(&s, static_cast<size_t>(7));
-  f(&s, absl::string_view(" OK"));
-  EXPECT_EQ("Testing: 1234567 OK", s);
-}
-
-// Make sure people who are mistakenly using std::vector<bool> even though
-// they're not memory-constrained can use absl::AlphaNumFormatter().
-TEST(AlphaNumFormatter, VectorOfBool) {
-  auto f = absl::AlphaNumFormatter();
-  std::string s;
-  std::vector<bool> v = {true, false, true};
-  f(&s, *v.cbegin());
-  f(&s, *v.begin());
-  f(&s, v[1]);
-  EXPECT_EQ("110", s);
-}
-
-TEST(AlphaNumFormatter, AlphaNum) {
-  auto f = absl::AlphaNumFormatter();
-  std::string s;
-  f(&s, absl::AlphaNum("hello"));
-  EXPECT_EQ("hello", s);
-}
-
-struct StreamableType {
-  std::string contents;
-};
-inline std::ostream& operator<<(std::ostream& os, const StreamableType& t) {
-  os << "Streamable:" << t.contents;
-  return os;
-}
-
-TEST(StreamFormatter, FormatterAPI) {
-  auto f = absl::StreamFormatter();
-  std::string s;
-  f(&s, "Testing: ");
-  f(&s, static_cast<int>(1));
-  f(&s, static_cast<int16_t>(2));
-  f(&s, static_cast<int64_t>(3));
-  f(&s, static_cast<float>(4));
-  f(&s, static_cast<double>(5));
-  f(&s, static_cast<unsigned>(6));
-  f(&s, static_cast<size_t>(7));
-  f(&s, absl::string_view(" OK "));
-  StreamableType streamable = {"object"};
-  f(&s, streamable);
-  EXPECT_EQ("Testing: 1234567 OK Streamable:object", s);
-}
-
-// A dummy formatter that wraps each element in parens. Used in some tests
-// below.
-struct TestingParenFormatter {
-  template <typename T>
-  void operator()(std::string* s, const T& t) {
-    absl::StrAppend(s, "(", t, ")");
-  }
-};
-
-TEST(PairFormatter, FormatterAPI) {
-  {
-    // Tests default PairFormatter(sep) that uses AlphaNumFormatter for the
-    // 'first' and 'second' members.
-    const auto f = absl::PairFormatter("=");
-    std::string s;
-    f(&s, std::make_pair("a", "b"));
-    f(&s, std::make_pair(1, 2));
-    EXPECT_EQ("a=b1=2", s);
-  }
-
-  {
-    // Tests using a custom formatter for the 'first' and 'second' members.
-    auto f = absl::PairFormatter(TestingParenFormatter(), "=",
-                                 TestingParenFormatter());
-    std::string s;
-    f(&s, std::make_pair("a", "b"));
-    f(&s, std::make_pair(1, 2));
-    EXPECT_EQ("(a)=(b)(1)=(2)", s);
-  }
-}
-
-TEST(DereferenceFormatter, FormatterAPI) {
-  {
-    // Tests wrapping the default AlphaNumFormatter.
-    const absl::strings_internal::DereferenceFormatterImpl<
-        absl::strings_internal::AlphaNumFormatterImpl>
-        f;
-    int x = 1, y = 2, z = 3;
-    std::string s;
-    f(&s, &x);
-    f(&s, &y);
-    f(&s, &z);
-    EXPECT_EQ("123", s);
-  }
-
-  {
-    // Tests wrapping std::string's default formatter.
-    absl::strings_internal::DereferenceFormatterImpl<
-        absl::strings_internal::DefaultFormatter<std::string>::Type>
-        f;
-
-    std::string x = "x";
-    std::string y = "y";
-    std::string z = "z";
-    std::string s;
-    f(&s, &x);
-    f(&s, &y);
-    f(&s, &z);
-    EXPECT_EQ(s, "xyz");
-  }
-
-  {
-    // Tests wrapping a custom formatter.
-    auto f = absl::DereferenceFormatter(TestingParenFormatter());
-    int x = 1, y = 2, z = 3;
-    std::string s;
-    f(&s, &x);
-    f(&s, &y);
-    f(&s, &z);
-    EXPECT_EQ("(1)(2)(3)", s);
-  }
-
-  {
-    absl::strings_internal::DereferenceFormatterImpl<
-        absl::strings_internal::AlphaNumFormatterImpl>
-        f;
-    auto x = std::unique_ptr<int>(new int(1));
-    auto y = std::unique_ptr<int>(new int(2));
-    auto z = std::unique_ptr<int>(new int(3));
-    std::string s;
-    f(&s, x);
-    f(&s, y);
-    f(&s, z);
-    EXPECT_EQ("123", s);
-  }
-}
-
-//
-// Tests the interfaces for the 4 public Join function overloads. The semantics
-// of the algorithm is covered in the above APIExamples test.
-//
-TEST(StrJoin, PublicAPIOverloads) {
-  std::vector<std::string> v = {"a", "b", "c"};
-
-  // Iterators + formatter
-  EXPECT_EQ("a-b-c",
-            absl::StrJoin(v.begin(), v.end(), "-", absl::AlphaNumFormatter()));
-  // Range + formatter
-  EXPECT_EQ("a-b-c", absl::StrJoin(v, "-", absl::AlphaNumFormatter()));
-  // Iterators, no formatter
-  EXPECT_EQ("a-b-c", absl::StrJoin(v.begin(), v.end(), "-"));
-  // Range, no formatter
-  EXPECT_EQ("a-b-c", absl::StrJoin(v, "-"));
-}
-
-TEST(StrJoin, Array) {
-  const absl::string_view a[] = {"a", "b", "c"};
-  EXPECT_EQ("a-b-c", absl::StrJoin(a, "-"));
-}
-
-TEST(StrJoin, InitializerList) {
-  { EXPECT_EQ("a-b-c", absl::StrJoin({"a", "b", "c"}, "-")); }
-
-  {
-    auto a = {"a", "b", "c"};
-    EXPECT_EQ("a-b-c", absl::StrJoin(a, "-"));
-  }
-
-  {
-    std::initializer_list<const char*> a = {"a", "b", "c"};
-    EXPECT_EQ("a-b-c", absl::StrJoin(a, "-"));
-  }
-
-  {
-    std::initializer_list<std::string> a = {"a", "b", "c"};
-    EXPECT_EQ("a-b-c", absl::StrJoin(a, "-"));
-  }
-
-  {
-    std::initializer_list<absl::string_view> a = {"a", "b", "c"};
-    EXPECT_EQ("a-b-c", absl::StrJoin(a, "-"));
-  }
-
-  {
-    // Tests initializer_list with a non-default formatter
-    auto a = {"a", "b", "c"};
-    TestingParenFormatter f;
-    EXPECT_EQ("(a)-(b)-(c)", absl::StrJoin(a, "-", f));
-  }
-
-  {
-    // initializer_list of ints
-    EXPECT_EQ("1-2-3", absl::StrJoin({1, 2, 3}, "-"));
-  }
-
-  {
-    // Tests initializer_list of ints with a non-default formatter
-    auto a = {1, 2, 3};
-    TestingParenFormatter f;
-    EXPECT_EQ("(1)-(2)-(3)", absl::StrJoin(a, "-", f));
-  }
-}
-
-TEST(StrJoin, Tuple) {
-  EXPECT_EQ("", absl::StrJoin(std::make_tuple(), "-"));
-  EXPECT_EQ("hello", absl::StrJoin(std::make_tuple("hello"), "-"));
-
-  int x(10);
-  std::string y("hello");
-  double z(3.14);
-  EXPECT_EQ("10-hello-3.14", absl::StrJoin(std::make_tuple(x, y, z), "-"));
-
-  // Faster! Faster!!
-  EXPECT_EQ("10-hello-3.14",
-            absl::StrJoin(std::make_tuple(x, std::cref(y), z), "-"));
-
-  struct TestFormatter {
-    char buffer[128];
-    void operator()(std::string* out, int v) {
-      snprintf(buffer, sizeof(buffer), "%#.8x", v);
-      out->append(buffer);
-    }
-    void operator()(std::string* out, double v) {
-      snprintf(buffer, sizeof(buffer), "%#.0f", v);
-      out->append(buffer);
-    }
-    void operator()(std::string* out, const std::string& v) {
-      snprintf(buffer, sizeof(buffer), "%.4s", v.c_str());
-      out->append(buffer);
-    }
-  };
-  EXPECT_EQ("0x0000000a-hell-3.",
-            absl::StrJoin(std::make_tuple(x, y, z), "-", TestFormatter()));
-  EXPECT_EQ(
-      "0x0000000a-hell-3.",
-      absl::StrJoin(std::make_tuple(x, std::cref(y), z), "-", TestFormatter()));
-  EXPECT_EQ("0x0000000a-hell-3.",
-            absl::StrJoin(std::make_tuple(&x, &y, &z), "-",
-                          absl::DereferenceFormatter(TestFormatter())));
-  EXPECT_EQ("0x0000000a-hell-3.",
-            absl::StrJoin(std::make_tuple(absl::make_unique<int>(x),
-                                          absl::make_unique<std::string>(y),
-                                          absl::make_unique<double>(z)),
-                          "-", absl::DereferenceFormatter(TestFormatter())));
-  EXPECT_EQ("0x0000000a-hell-3.",
-            absl::StrJoin(std::make_tuple(absl::make_unique<int>(x), &y, &z),
-                          "-", absl::DereferenceFormatter(TestFormatter())));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_replace.cc b/third_party/abseil/absl/strings/str_replace.cc
deleted file mode 100644
index 2bd5fa9..0000000
--- a/third_party/abseil/absl/strings/str_replace.cc
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_replace.h"
-
-#include "absl/strings/str_cat.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace strings_internal {
-
-using FixedMapping =
-    std::initializer_list<std::pair<absl::string_view, absl::string_view>>;
-
-// Applies the ViableSubstitutions in subs_ptr to the absl::string_view s, and
-// stores the result in *result_ptr. Returns the number of substitutions that
-// occurred.
-int ApplySubstitutions(
-    absl::string_view s,
-    std::vector<strings_internal::ViableSubstitution>* subs_ptr,
-    std::string* result_ptr) {
-  auto& subs = *subs_ptr;
-  int substitutions = 0;
-  size_t pos = 0;
-  while (!subs.empty()) {
-    auto& sub = subs.back();
-    if (sub.offset >= pos) {
-      if (pos <= s.size()) {
-        StrAppend(result_ptr, s.substr(pos, sub.offset - pos), sub.replacement);
-      }
-      pos = sub.offset + sub.old.size();
-      substitutions += 1;
-    }
-    sub.offset = s.find(sub.old, pos);
-    if (sub.offset == s.npos) {
-      subs.pop_back();
-    } else {
-      // Insertion sort to ensure the last ViableSubstitution continues to be
-      // before all the others.
-      size_t index = subs.size();
-      while (--index && subs[index - 1].OccursBefore(subs[index])) {
-        std::swap(subs[index], subs[index - 1]);
-      }
-    }
-  }
-  result_ptr->append(s.data() + pos, s.size() - pos);
-  return substitutions;
-}
-
-}  // namespace strings_internal
-
-// We can implement this in terms of the generic StrReplaceAll, but
-// we must specify the template overload because C++ cannot deduce the type
-// of an initializer_list parameter to a function, and also if we don't specify
-// the type, we just call ourselves.
-//
-// Note that we implement them here, rather than in the header, so that they
-// aren't inlined.
-
-std::string StrReplaceAll(absl::string_view s,
-                          strings_internal::FixedMapping replacements) {
-  return StrReplaceAll<strings_internal::FixedMapping>(s, replacements);
-}
-
-int StrReplaceAll(strings_internal::FixedMapping replacements,
-                  std::string* target) {
-  return StrReplaceAll<strings_internal::FixedMapping>(replacements, target);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/str_replace.h b/third_party/abseil/absl/strings/str_replace.h
deleted file mode 100644
index 273c707..0000000
--- a/third_party/abseil/absl/strings/str_replace.h
+++ /dev/null
@@ -1,219 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: str_replace.h
-// -----------------------------------------------------------------------------
-//
-// This file defines `absl::StrReplaceAll()`, a general-purpose string
-// replacement function designed for large, arbitrary text substitutions,
-// especially on strings which you are receiving from some other system for
-// further processing (e.g. processing regular expressions, escaping HTML
-// entities, etc.). `StrReplaceAll` is designed to be efficient even when only
-// one substitution is being performed, or when substitution is rare.
-//
-// If the string being modified is known at compile-time, and the substitutions
-// vary, `absl::Substitute()` may be a better choice.
-//
-// Example:
-//
-// std::string html_escaped = absl::StrReplaceAll(user_input, {
-//                                                {"&", "&amp;"},
-//                                                {"<", "&lt;"},
-//                                                {">", "&gt;"},
-//                                                {"\"", "&quot;"},
-//                                                {"'", "&#39;"}});
-#ifndef ABSL_STRINGS_STR_REPLACE_H_
-#define ABSL_STRINGS_STR_REPLACE_H_
-
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "absl/base/attributes.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// StrReplaceAll()
-//
-// Replaces character sequences within a given string with replacements provided
-// within an initializer list of key/value pairs. Candidate replacements are
-// considered in order as they occur within the string, with earlier matches
-// taking precedence, and longer matches taking precedence for candidates
-// starting at the same position in the string. Once a substitution is made, the
-// replaced text is not considered for any further substitutions.
-//
-// Example:
-//
-//   std::string s = absl::StrReplaceAll(
-//       "$who bought $count #Noun. Thanks $who!",
-//       {{"$count", absl::StrCat(5)},
-//        {"$who", "Bob"},
-//        {"#Noun", "Apples"}});
-//   EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
-ABSL_MUST_USE_RESULT std::string StrReplaceAll(
-    absl::string_view s,
-    std::initializer_list<std::pair<absl::string_view, absl::string_view>>
-        replacements);
-
-// Overload of `StrReplaceAll()` to accept a container of key/value replacement
-// pairs (typically either an associative map or a `std::vector` of `std::pair`
-// elements). A vector of pairs is generally more efficient.
-//
-// Examples:
-//
-//   std::map<const absl::string_view, const absl::string_view> replacements;
-//   replacements["$who"] = "Bob";
-//   replacements["$count"] = "5";
-//   replacements["#Noun"] = "Apples";
-//   std::string s = absl::StrReplaceAll(
-//       "$who bought $count #Noun. Thanks $who!",
-//       replacements);
-//   EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
-//
-//   // A std::vector of std::pair elements can be more efficient.
-//   std::vector<std::pair<const absl::string_view, std::string>> replacements;
-//   replacements.push_back({"&", "&amp;"});
-//   replacements.push_back({"<", "&lt;"});
-//   replacements.push_back({">", "&gt;"});
-//   std::string s = absl::StrReplaceAll("if (ptr < &foo)",
-//                                  replacements);
-//   EXPECT_EQ("if (ptr &lt; &amp;foo)", s);
-template <typename StrToStrMapping>
-std::string StrReplaceAll(absl::string_view s,
-                          const StrToStrMapping& replacements);
-
-// Overload of `StrReplaceAll()` to replace character sequences within a given
-// output string *in place* with replacements provided within an initializer
-// list of key/value pairs, returning the number of substitutions that occurred.
-//
-// Example:
-//
-//   std::string s = std::string("$who bought $count #Noun. Thanks $who!");
-//   int count;
-//   count = absl::StrReplaceAll({{"$count", absl::StrCat(5)},
-//                               {"$who", "Bob"},
-//                               {"#Noun", "Apples"}}, &s);
-//  EXPECT_EQ(count, 4);
-//  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
-int StrReplaceAll(
-    std::initializer_list<std::pair<absl::string_view, absl::string_view>>
-        replacements,
-    std::string* target);
-
-// Overload of `StrReplaceAll()` to replace patterns within a given output
-// string *in place* with replacements provided within a container of key/value
-// pairs.
-//
-// Example:
-//
-//   std::string s = std::string("if (ptr < &foo)");
-//   int count = absl::StrReplaceAll({{"&", "&amp;"},
-//                                    {"<", "&lt;"},
-//                                    {">", "&gt;"}}, &s);
-//  EXPECT_EQ(count, 2);
-//  EXPECT_EQ("if (ptr &lt; &amp;foo)", s);
-template <typename StrToStrMapping>
-int StrReplaceAll(const StrToStrMapping& replacements, std::string* target);
-
-// Implementation details only, past this point.
-namespace strings_internal {
-
-struct ViableSubstitution {
-  absl::string_view old;
-  absl::string_view replacement;
-  size_t offset;
-
-  ViableSubstitution(absl::string_view old_str,
-                     absl::string_view replacement_str, size_t offset_val)
-      : old(old_str), replacement(replacement_str), offset(offset_val) {}
-
-  // One substitution occurs "before" another (takes priority) if either
-  // it has the lowest offset, or it has the same offset but a larger size.
-  bool OccursBefore(const ViableSubstitution& y) const {
-    if (offset != y.offset) return offset < y.offset;
-    return old.size() > y.old.size();
-  }
-};
-
-// Build a vector of ViableSubstitutions based on the given list of
-// replacements. subs can be implemented as a priority_queue. However, it turns
-// out that most callers have small enough a list of substitutions that the
-// overhead of such a queue isn't worth it.
-template <typename StrToStrMapping>
-std::vector<ViableSubstitution> FindSubstitutions(
-    absl::string_view s, const StrToStrMapping& replacements) {
-  std::vector<ViableSubstitution> subs;
-  subs.reserve(replacements.size());
-
-  for (const auto& rep : replacements) {
-    using std::get;
-    absl::string_view old(get<0>(rep));
-
-    size_t pos = s.find(old);
-    if (pos == s.npos) continue;
-
-    // Ignore attempts to replace "". This condition is almost never true,
-    // but above condition is frequently true. That's why we test for this
-    // now and not before.
-    if (old.empty()) continue;
-
-    subs.emplace_back(old, get<1>(rep), pos);
-
-    // Insertion sort to ensure the last ViableSubstitution comes before
-    // all the others.
-    size_t index = subs.size();
-    while (--index && subs[index - 1].OccursBefore(subs[index])) {
-      std::swap(subs[index], subs[index - 1]);
-    }
-  }
-  return subs;
-}
-
-int ApplySubstitutions(absl::string_view s,
-                       std::vector<ViableSubstitution>* subs_ptr,
-                       std::string* result_ptr);
-
-}  // namespace strings_internal
-
-template <typename StrToStrMapping>
-std::string StrReplaceAll(absl::string_view s,
-                          const StrToStrMapping& replacements) {
-  auto subs = strings_internal::FindSubstitutions(s, replacements);
-  std::string result;
-  result.reserve(s.size());
-  strings_internal::ApplySubstitutions(s, &subs, &result);
-  return result;
-}
-
-template <typename StrToStrMapping>
-int StrReplaceAll(const StrToStrMapping& replacements, std::string* target) {
-  auto subs = strings_internal::FindSubstitutions(*target, replacements);
-  if (subs.empty()) return 0;
-
-  std::string result;
-  result.reserve(target->size());
-  int substitutions =
-      strings_internal::ApplySubstitutions(*target, &subs, &result);
-  target->swap(result);
-  return substitutions;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STR_REPLACE_H_
diff --git a/third_party/abseil/absl/strings/str_replace_benchmark.cc b/third_party/abseil/absl/strings/str_replace_benchmark.cc
deleted file mode 100644
index 01331da..0000000
--- a/third_party/abseil/absl/strings/str_replace_benchmark.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_replace.h"
-
-#include <cstring>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace {
-
-std::string* big_string;
-std::string* after_replacing_the;
-std::string* after_replacing_many;
-
-struct Replacement {
-  const char* needle;
-  const char* replacement;
-} replacements[] = {
-    {"the", "box"},          //
-    {"brown", "quick"},      //
-    {"jumped", "liquored"},  //
-    {"dozen", "brown"},      //
-    {"lazy", "pack"},        //
-    {"liquor", "shakes"},    //
-};
-
-// Here, we set up a string for use in global-replace benchmarks.
-// We started with a million blanks, and then deterministically insert
-// 10,000 copies each of two pangrams.  The result is a string that is
-// 40% blank space and 60% these words.  'the' occurs 18,247 times and
-// all the substitutions together occur 49,004 times.
-//
-// We then create "after_replacing_the" to be a string that is a result of
-// replacing "the" with "box" in big_string.
-//
-// And then we create "after_replacing_many" to be a string that is result
-// of preferring several substitutions.
-void SetUpStrings() {
-  if (big_string == nullptr) {
-    size_t r = 0;
-    big_string = new std::string(1000 * 1000, ' ');
-    for (std::string phrase : {"the quick brown fox jumped over the lazy dogs",
-                               "pack my box with the five dozen liquor jugs"}) {
-      for (int i = 0; i < 10 * 1000; ++i) {
-        r = r * 237 + 41;  // not very random.
-        memcpy(&(*big_string)[r % (big_string->size() - phrase.size())],
-               phrase.data(), phrase.size());
-      }
-    }
-    // big_string->resize(50);
-    // OK, we've set up the string, now let's set up expectations - first by
-    // just replacing "the" with "box"
-    after_replacing_the = new std::string(*big_string);
-    for (size_t pos = 0;
-         (pos = after_replacing_the->find("the", pos)) != std::string::npos;) {
-      memcpy(&(*after_replacing_the)[pos], "box", 3);
-    }
-    // And then with all the replacements.
-    after_replacing_many = new std::string(*big_string);
-    for (size_t pos = 0;;) {
-      size_t next_pos = static_cast<size_t>(-1);
-      const char* needle_string = nullptr;
-      const char* replacement_string = nullptr;
-      for (const auto& r : replacements) {
-        auto needlepos = after_replacing_many->find(r.needle, pos);
-        if (needlepos != std::string::npos && needlepos < next_pos) {
-          next_pos = needlepos;
-          needle_string = r.needle;
-          replacement_string = r.replacement;
-        }
-      }
-      if (next_pos > after_replacing_many->size()) break;
-      after_replacing_many->replace(next_pos, strlen(needle_string),
-                                    replacement_string);
-      next_pos += strlen(replacement_string);
-      pos = next_pos;
-    }
-  }
-}
-
-void BM_StrReplaceAllOneReplacement(benchmark::State& state) {
-  SetUpStrings();
-  std::string src = *big_string;
-  for (auto _ : state) {
-    std::string dest = absl::StrReplaceAll(src, {{"the", "box"}});
-    ABSL_RAW_CHECK(dest == *after_replacing_the,
-                   "not benchmarking intended behavior");
-  }
-}
-BENCHMARK(BM_StrReplaceAllOneReplacement);
-
-void BM_StrReplaceAll(benchmark::State& state) {
-  SetUpStrings();
-  std::string src = *big_string;
-  for (auto _ : state) {
-    std::string dest = absl::StrReplaceAll(src, {{"the", "box"},
-                                                 {"brown", "quick"},
-                                                 {"jumped", "liquored"},
-                                                 {"dozen", "brown"},
-                                                 {"lazy", "pack"},
-                                                 {"liquor", "shakes"}});
-    ABSL_RAW_CHECK(dest == *after_replacing_many,
-                   "not benchmarking intended behavior");
-  }
-}
-BENCHMARK(BM_StrReplaceAll);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_replace_test.cc b/third_party/abseil/absl/strings/str_replace_test.cc
deleted file mode 100644
index 9d8c7f7..0000000
--- a/third_party/abseil/absl/strings/str_replace_test.cc
+++ /dev/null
@@ -1,341 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_replace.h"
-
-#include <list>
-#include <map>
-#include <tuple>
-
-#include "gtest/gtest.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-
-TEST(StrReplaceAll, OneReplacement) {
-  std::string s;
-
-  // Empty string.
-  s = absl::StrReplaceAll(s, {{"", ""}});
-  EXPECT_EQ(s, "");
-  s = absl::StrReplaceAll(s, {{"x", ""}});
-  EXPECT_EQ(s, "");
-  s = absl::StrReplaceAll(s, {{"", "y"}});
-  EXPECT_EQ(s, "");
-  s = absl::StrReplaceAll(s, {{"x", "y"}});
-  EXPECT_EQ(s, "");
-
-  // Empty substring.
-  s = absl::StrReplaceAll("abc", {{"", ""}});
-  EXPECT_EQ(s, "abc");
-  s = absl::StrReplaceAll("abc", {{"", "y"}});
-  EXPECT_EQ(s, "abc");
-  s = absl::StrReplaceAll("abc", {{"x", ""}});
-  EXPECT_EQ(s, "abc");
-
-  // Substring not found.
-  s = absl::StrReplaceAll("abc", {{"xyz", "123"}});
-  EXPECT_EQ(s, "abc");
-
-  // Replace entire string.
-  s = absl::StrReplaceAll("abc", {{"abc", "xyz"}});
-  EXPECT_EQ(s, "xyz");
-
-  // Replace once at the start.
-  s = absl::StrReplaceAll("abc", {{"a", "x"}});
-  EXPECT_EQ(s, "xbc");
-
-  // Replace once in the middle.
-  s = absl::StrReplaceAll("abc", {{"b", "x"}});
-  EXPECT_EQ(s, "axc");
-
-  // Replace once at the end.
-  s = absl::StrReplaceAll("abc", {{"c", "x"}});
-  EXPECT_EQ(s, "abx");
-
-  // Replace multiple times with varying lengths of original/replacement.
-  s = absl::StrReplaceAll("ababa", {{"a", "xxx"}});
-  EXPECT_EQ(s, "xxxbxxxbxxx");
-
-  s = absl::StrReplaceAll("ababa", {{"b", "xxx"}});
-  EXPECT_EQ(s, "axxxaxxxa");
-
-  s = absl::StrReplaceAll("aaabaaabaaa", {{"aaa", "x"}});
-  EXPECT_EQ(s, "xbxbx");
-
-  s = absl::StrReplaceAll("abbbabbba", {{"bbb", "x"}});
-  EXPECT_EQ(s, "axaxa");
-
-  // Overlapping matches are replaced greedily.
-  s = absl::StrReplaceAll("aaa", {{"aa", "x"}});
-  EXPECT_EQ(s, "xa");
-
-  // The replacements are not recursive.
-  s = absl::StrReplaceAll("aaa", {{"aa", "a"}});
-  EXPECT_EQ(s, "aa");
-}
-
-TEST(StrReplaceAll, ManyReplacements) {
-  std::string s;
-
-  // Empty string.
-  s = absl::StrReplaceAll("", {{"", ""}, {"x", ""}, {"", "y"}, {"x", "y"}});
-  EXPECT_EQ(s, "");
-
-  // Empty substring.
-  s = absl::StrReplaceAll("abc", {{"", ""}, {"", "y"}, {"x", ""}});
-  EXPECT_EQ(s, "abc");
-
-  // Replace entire string, one char at a time
-  s = absl::StrReplaceAll("abc", {{"a", "x"}, {"b", "y"}, {"c", "z"}});
-  EXPECT_EQ(s, "xyz");
-  s = absl::StrReplaceAll("zxy", {{"z", "x"}, {"x", "y"}, {"y", "z"}});
-  EXPECT_EQ(s, "xyz");
-
-  // Replace once at the start (longer matches take precedence)
-  s = absl::StrReplaceAll("abc", {{"a", "x"}, {"ab", "xy"}, {"abc", "xyz"}});
-  EXPECT_EQ(s, "xyz");
-
-  // Replace once in the middle.
-  s = absl::StrReplaceAll(
-      "Abc!", {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc", "yz"}, {"c", "z"}});
-  EXPECT_EQ(s, "Ayz!");
-
-  // Replace once at the end.
-  s = absl::StrReplaceAll(
-      "Abc!",
-      {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc!", "yz?"}, {"c!", "z;"}});
-  EXPECT_EQ(s, "Ayz?");
-
-  // Replace multiple times with varying lengths of original/replacement.
-  s = absl::StrReplaceAll("ababa", {{"a", "xxx"}, {"b", "XXXX"}});
-  EXPECT_EQ(s, "xxxXXXXxxxXXXXxxx");
-
-  // Overlapping matches are replaced greedily.
-  s = absl::StrReplaceAll("aaa", {{"aa", "x"}, {"a", "X"}});
-  EXPECT_EQ(s, "xX");
-  s = absl::StrReplaceAll("aaa", {{"a", "X"}, {"aa", "x"}});
-  EXPECT_EQ(s, "xX");
-
-  // Two well-known sentences
-  s = absl::StrReplaceAll("the quick brown fox jumped over the lazy dogs",
-                          {
-                              {"brown", "box"},
-                              {"dogs", "jugs"},
-                              {"fox", "with"},
-                              {"jumped", "five"},
-                              {"over", "dozen"},
-                              {"quick", "my"},
-                              {"the", "pack"},
-                              {"the lazy", "liquor"},
-                          });
-  EXPECT_EQ(s, "pack my box with five dozen liquor jugs");
-}
-
-TEST(StrReplaceAll, ManyReplacementsInMap) {
-  std::map<const char *, const char *> replacements;
-  replacements["$who"] = "Bob";
-  replacements["$count"] = "5";
-  replacements["#Noun"] = "Apples";
-  std::string s = absl::StrReplaceAll("$who bought $count #Noun. Thanks $who!",
-                                      replacements);
-  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
-}
-
-TEST(StrReplaceAll, ReplacementsInPlace) {
-  std::string s = std::string("$who bought $count #Noun. Thanks $who!");
-  int count;
-  count = absl::StrReplaceAll({{"$count", absl::StrCat(5)},
-                              {"$who", "Bob"},
-                              {"#Noun", "Apples"}}, &s);
-  EXPECT_EQ(count, 4);
-  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
-}
-
-TEST(StrReplaceAll, ReplacementsInPlaceInMap) {
-  std::string s = std::string("$who bought $count #Noun. Thanks $who!");
-  std::map<absl::string_view, absl::string_view> replacements;
-  replacements["$who"] = "Bob";
-  replacements["$count"] = "5";
-  replacements["#Noun"] = "Apples";
-  int count;
-  count = absl::StrReplaceAll(replacements, &s);
-  EXPECT_EQ(count, 4);
-  EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
-}
-
-struct Cont {
-  Cont() {}
-  explicit Cont(absl::string_view src) : data(src) {}
-
-  absl::string_view data;
-};
-
-template <int index>
-absl::string_view get(const Cont& c) {
-  auto splitter = absl::StrSplit(c.data, ':');
-  auto it = splitter.begin();
-  for (int i = 0; i < index; ++i) ++it;
-
-  return *it;
-}
-
-TEST(StrReplaceAll, VariableNumber) {
-  std::string s;
-  {
-    std::vector<std::pair<std::string, std::string>> replacements;
-
-    s = "abc";
-    EXPECT_EQ(0, absl::StrReplaceAll(replacements, &s));
-    EXPECT_EQ("abc", s);
-
-    s = "abc";
-    replacements.push_back({"a", "A"});
-    EXPECT_EQ(1, absl::StrReplaceAll(replacements, &s));
-    EXPECT_EQ("Abc", s);
-
-    s = "abc";
-    replacements.push_back({"b", "B"});
-    EXPECT_EQ(2, absl::StrReplaceAll(replacements, &s));
-    EXPECT_EQ("ABc", s);
-
-    s = "abc";
-    replacements.push_back({"d", "D"});
-    EXPECT_EQ(2, absl::StrReplaceAll(replacements, &s));
-    EXPECT_EQ("ABc", s);
-
-    EXPECT_EQ("ABcABc", absl::StrReplaceAll("abcabc", replacements));
-  }
-
-  {
-    std::map<const char*, const char*> replacements;
-    replacements["aa"] = "x";
-    replacements["a"] = "X";
-    s = "aaa";
-    EXPECT_EQ(2, absl::StrReplaceAll(replacements, &s));
-    EXPECT_EQ("xX", s);
-
-    EXPECT_EQ("xxX", absl::StrReplaceAll("aaaaa", replacements));
-  }
-
-  {
-    std::list<std::pair<absl::string_view, absl::string_view>> replacements = {
-        {"a", "x"}, {"b", "y"}, {"c", "z"}};
-
-    std::string s = absl::StrReplaceAll("abc", replacements);
-    EXPECT_EQ(s, "xyz");
-  }
-
-  {
-    using X = std::tuple<absl::string_view, std::string, int>;
-    std::vector<X> replacements(3);
-    replacements[0] = X{"a", "x", 1};
-    replacements[1] = X{"b", "y", 0};
-    replacements[2] = X{"c", "z", -1};
-
-    std::string s = absl::StrReplaceAll("abc", replacements);
-    EXPECT_EQ(s, "xyz");
-  }
-
-  {
-    std::vector<Cont> replacements(3);
-    replacements[0] = Cont{"a:x"};
-    replacements[1] = Cont{"b:y"};
-    replacements[2] = Cont{"c:z"};
-
-    std::string s = absl::StrReplaceAll("abc", replacements);
-    EXPECT_EQ(s, "xyz");
-  }
-}
-
-// Same as above, but using the in-place variant of absl::StrReplaceAll,
-// that returns the # of replacements performed.
-TEST(StrReplaceAll, Inplace) {
-  std::string s;
-  int reps;
-
-  // Empty string.
-  s = "";
-  reps = absl::StrReplaceAll({{"", ""}, {"x", ""}, {"", "y"}, {"x", "y"}}, &s);
-  EXPECT_EQ(reps, 0);
-  EXPECT_EQ(s, "");
-
-  // Empty substring.
-  s = "abc";
-  reps = absl::StrReplaceAll({{"", ""}, {"", "y"}, {"x", ""}}, &s);
-  EXPECT_EQ(reps, 0);
-  EXPECT_EQ(s, "abc");
-
-  // Replace entire string, one char at a time
-  s = "abc";
-  reps = absl::StrReplaceAll({{"a", "x"}, {"b", "y"}, {"c", "z"}}, &s);
-  EXPECT_EQ(reps, 3);
-  EXPECT_EQ(s, "xyz");
-  s = "zxy";
-  reps = absl::StrReplaceAll({{"z", "x"}, {"x", "y"}, {"y", "z"}}, &s);
-  EXPECT_EQ(reps, 3);
-  EXPECT_EQ(s, "xyz");
-
-  // Replace once at the start (longer matches take precedence)
-  s = "abc";
-  reps = absl::StrReplaceAll({{"a", "x"}, {"ab", "xy"}, {"abc", "xyz"}}, &s);
-  EXPECT_EQ(reps, 1);
-  EXPECT_EQ(s, "xyz");
-
-  // Replace once in the middle.
-  s = "Abc!";
-  reps = absl::StrReplaceAll(
-      {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc", "yz"}, {"c", "z"}}, &s);
-  EXPECT_EQ(reps, 1);
-  EXPECT_EQ(s, "Ayz!");
-
-  // Replace once at the end.
-  s = "Abc!";
-  reps = absl::StrReplaceAll(
-      {{"a", "x"}, {"ab", "xy"}, {"b", "y"}, {"bc!", "yz?"}, {"c!", "z;"}}, &s);
-  EXPECT_EQ(reps, 1);
-  EXPECT_EQ(s, "Ayz?");
-
-  // Replace multiple times with varying lengths of original/replacement.
-  s = "ababa";
-  reps = absl::StrReplaceAll({{"a", "xxx"}, {"b", "XXXX"}}, &s);
-  EXPECT_EQ(reps, 5);
-  EXPECT_EQ(s, "xxxXXXXxxxXXXXxxx");
-
-  // Overlapping matches are replaced greedily.
-  s = "aaa";
-  reps = absl::StrReplaceAll({{"aa", "x"}, {"a", "X"}}, &s);
-  EXPECT_EQ(reps, 2);
-  EXPECT_EQ(s, "xX");
-  s = "aaa";
-  reps = absl::StrReplaceAll({{"a", "X"}, {"aa", "x"}}, &s);
-  EXPECT_EQ(reps, 2);
-  EXPECT_EQ(s, "xX");
-
-  // Two well-known sentences
-  s = "the quick brown fox jumped over the lazy dogs";
-  reps = absl::StrReplaceAll(
-      {
-          {"brown", "box"},
-          {"dogs", "jugs"},
-          {"fox", "with"},
-          {"jumped", "five"},
-          {"over", "dozen"},
-          {"quick", "my"},
-          {"the", "pack"},
-          {"the lazy", "liquor"},
-      },
-      &s);
-  EXPECT_EQ(reps, 8);
-  EXPECT_EQ(s, "pack my box with five dozen liquor jugs");
-}
diff --git a/third_party/abseil/absl/strings/str_split.cc b/third_party/abseil/absl/strings/str_split.cc
deleted file mode 100644
index e08c26b..0000000
--- a/third_party/abseil/absl/strings/str_split.cc
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_split.h"
-
-#include <algorithm>
-#include <cassert>
-#include <cstdint>
-#include <cstdlib>
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <memory>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/ascii.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-// This GenericFind() template function encapsulates the finding algorithm
-// shared between the ByString and ByAnyChar delimiters. The FindPolicy
-// template parameter allows each delimiter to customize the actual find
-// function to use and the length of the found delimiter. For example, the
-// Literal delimiter will ultimately use absl::string_view::find(), and the
-// AnyOf delimiter will use absl::string_view::find_first_of().
-template <typename FindPolicy>
-absl::string_view GenericFind(absl::string_view text,
-                              absl::string_view delimiter, size_t pos,
-                              FindPolicy find_policy) {
-  if (delimiter.empty() && text.length() > 0) {
-    // Special case for empty string delimiters: always return a zero-length
-    // absl::string_view referring to the item at position 1 past pos.
-    return absl::string_view(text.data() + pos + 1, 0);
-  }
-  size_t found_pos = absl::string_view::npos;
-  absl::string_view found(text.data() + text.size(),
-                          0);  // By default, not found
-  found_pos = find_policy.Find(text, delimiter, pos);
-  if (found_pos != absl::string_view::npos) {
-    found = absl::string_view(text.data() + found_pos,
-                              find_policy.Length(delimiter));
-  }
-  return found;
-}
-
-// Finds using absl::string_view::find(), therefore the length of the found
-// delimiter is delimiter.length().
-struct LiteralPolicy {
-  size_t Find(absl::string_view text, absl::string_view delimiter, size_t pos) {
-    return text.find(delimiter, pos);
-  }
-  size_t Length(absl::string_view delimiter) { return delimiter.length(); }
-};
-
-// Finds using absl::string_view::find_first_of(), therefore the length of the
-// found delimiter is 1.
-struct AnyOfPolicy {
-  size_t Find(absl::string_view text, absl::string_view delimiter, size_t pos) {
-    return text.find_first_of(delimiter, pos);
-  }
-  size_t Length(absl::string_view /* delimiter */) { return 1; }
-};
-
-}  // namespace
-
-//
-// ByString
-//
-
-ByString::ByString(absl::string_view sp) : delimiter_(sp) {}
-
-absl::string_view ByString::Find(absl::string_view text, size_t pos) const {
-  if (delimiter_.length() == 1) {
-    // Much faster to call find on a single character than on an
-    // absl::string_view.
-    size_t found_pos = text.find(delimiter_[0], pos);
-    if (found_pos == absl::string_view::npos)
-      return absl::string_view(text.data() + text.size(), 0);
-    return text.substr(found_pos, 1);
-  }
-  return GenericFind(text, delimiter_, pos, LiteralPolicy());
-}
-
-//
-// ByChar
-//
-
-absl::string_view ByChar::Find(absl::string_view text, size_t pos) const {
-  size_t found_pos = text.find(c_, pos);
-  if (found_pos == absl::string_view::npos)
-    return absl::string_view(text.data() + text.size(), 0);
-  return text.substr(found_pos, 1);
-}
-
-//
-// ByAnyChar
-//
-
-ByAnyChar::ByAnyChar(absl::string_view sp) : delimiters_(sp) {}
-
-absl::string_view ByAnyChar::Find(absl::string_view text, size_t pos) const {
-  return GenericFind(text, delimiters_, pos, AnyOfPolicy());
-}
-
-//
-// ByLength
-//
-ByLength::ByLength(ptrdiff_t length) : length_(length) {
-  ABSL_RAW_CHECK(length > 0, "");
-}
-
-absl::string_view ByLength::Find(absl::string_view text,
-                                      size_t pos) const {
-  pos = std::min(pos, text.size());  // truncate `pos`
-  absl::string_view substr = text.substr(pos);
-  // If the string is shorter than the chunk size we say we
-  // "can't find the delimiter" so this will be the last chunk.
-  if (substr.length() <= static_cast<size_t>(length_))
-    return absl::string_view(text.data() + text.size(), 0);
-
-  return absl::string_view(substr.data() + length_, 0);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/str_split.h b/third_party/abseil/absl/strings/str_split.h
deleted file mode 100644
index bfbca42..0000000
--- a/third_party/abseil/absl/strings/str_split.h
+++ /dev/null
@@ -1,548 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: str_split.h
-// -----------------------------------------------------------------------------
-//
-// This file contains functions for splitting strings. It defines the main
-// `StrSplit()` function, several delimiters for determining the boundaries on
-// which to split the string, and predicates for filtering delimited results.
-// `StrSplit()` adapts the returned collection to the type specified by the
-// caller.
-//
-// Example:
-//
-//   // Splits the given string on commas. Returns the results in a
-//   // vector of strings.
-//   std::vector<std::string> v = absl::StrSplit("a,b,c", ',');
-//   // Can also use ","
-//   // v[0] == "a", v[1] == "b", v[2] == "c"
-//
-// See StrSplit() below for more information.
-#ifndef ABSL_STRINGS_STR_SPLIT_H_
-#define ABSL_STRINGS_STR_SPLIT_H_
-
-#include <algorithm>
-#include <cstddef>
-#include <map>
-#include <set>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/strings/internal/str_split_internal.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-//------------------------------------------------------------------------------
-// Delimiters
-//------------------------------------------------------------------------------
-//
-// `StrSplit()` uses delimiters to define the boundaries between elements in the
-// provided input. Several `Delimiter` types are defined below. If a string
-// (`const char*`, `std::string`, or `absl::string_view`) is passed in place of
-// an explicit `Delimiter` object, `StrSplit()` treats it the same way as if it
-// were passed a `ByString` delimiter.
-//
-// A `Delimiter` is an object with a `Find()` function that knows how to find
-// the first occurrence of itself in a given `absl::string_view`.
-//
-// The following `Delimiter` types are available for use within `StrSplit()`:
-//
-//   - `ByString` (default for string arguments)
-//   - `ByChar` (default for a char argument)
-//   - `ByAnyChar`
-//   - `ByLength`
-//   - `MaxSplits`
-//
-// A Delimiter's `Find()` member function will be passed an input `text` that is
-// to be split and a position (`pos`) to begin searching for the next delimiter
-// in `text`. The returned absl::string_view should refer to the next occurrence
-// (after `pos`) of the represented delimiter; this returned absl::string_view
-// represents the next location where the input `text` should be broken.
-//
-// The returned absl::string_view may be zero-length if the Delimiter does not
-// represent a part of the string (e.g., a fixed-length delimiter). If no
-// delimiter is found in the input `text`, a zero-length absl::string_view
-// referring to `text.end()` should be returned (e.g.,
-// `text.substr(text.size())`). It is important that the returned
-// absl::string_view always be within the bounds of the input `text` given as an
-// argument--it must not refer to a string that is physically located outside of
-// the given string.
-//
-// The following example is a simple Delimiter object that is created with a
-// single char and will look for that char in the text passed to the `Find()`
-// function:
-//
-//   struct SimpleDelimiter {
-//     const char c_;
-//     explicit SimpleDelimiter(char c) : c_(c) {}
-//     absl::string_view Find(absl::string_view text, size_t pos) {
-//       auto found = text.find(c_, pos);
-//       if (found == absl::string_view::npos)
-//         return text.substr(text.size());
-//
-//       return text.substr(found, 1);
-//     }
-//   };
-
-// ByString
-//
-// A sub-string delimiter. If `StrSplit()` is passed a string in place of a
-// `Delimiter` object, the string will be implicitly converted into a
-// `ByString` delimiter.
-//
-// Example:
-//
-//   // Because a string literal is converted to an `absl::ByString`,
-//   // the following two splits are equivalent.
-//
-//   std::vector<std::string> v1 = absl::StrSplit("a, b, c", ", ");
-//
-//   using absl::ByString;
-//   std::vector<std::string> v2 = absl::StrSplit("a, b, c",
-//                                                ByString(", "));
-//   // v[0] == "a", v[1] == "b", v[2] == "c"
-class ByString {
- public:
-  explicit ByString(absl::string_view sp);
-  absl::string_view Find(absl::string_view text, size_t pos) const;
-
- private:
-  const std::string delimiter_;
-};
-
-// ByChar
-//
-// A single character delimiter. `ByChar` is functionally equivalent to a
-// 1-char string within a `ByString` delimiter, but slightly more efficient.
-//
-// Example:
-//
-//   // Because a char literal is converted to a absl::ByChar,
-//   // the following two splits are equivalent.
-//   std::vector<std::string> v1 = absl::StrSplit("a,b,c", ',');
-//   using absl::ByChar;
-//   std::vector<std::string> v2 = absl::StrSplit("a,b,c", ByChar(','));
-//   // v[0] == "a", v[1] == "b", v[2] == "c"
-//
-// `ByChar` is also the default delimiter if a single character is given
-// as the delimiter to `StrSplit()`. For example, the following calls are
-// equivalent:
-//
-//   std::vector<std::string> v = absl::StrSplit("a-b", '-');
-//
-//   using absl::ByChar;
-//   std::vector<std::string> v = absl::StrSplit("a-b", ByChar('-'));
-//
-class ByChar {
- public:
-  explicit ByChar(char c) : c_(c) {}
-  absl::string_view Find(absl::string_view text, size_t pos) const;
-
- private:
-  char c_;
-};
-
-// ByAnyChar
-//
-// A delimiter that will match any of the given byte-sized characters within
-// its provided string.
-//
-// Note: this delimiter works with single-byte string data, but does not work
-// with variable-width encodings, such as UTF-8.
-//
-// Example:
-//
-//   using absl::ByAnyChar;
-//   std::vector<std::string> v = absl::StrSplit("a,b=c", ByAnyChar(",="));
-//   // v[0] == "a", v[1] == "b", v[2] == "c"
-//
-// If `ByAnyChar` is given the empty string, it behaves exactly like
-// `ByString` and matches each individual character in the input string.
-//
-class ByAnyChar {
- public:
-  explicit ByAnyChar(absl::string_view sp);
-  absl::string_view Find(absl::string_view text, size_t pos) const;
-
- private:
-  const std::string delimiters_;
-};
-
-// ByLength
-//
-// A delimiter for splitting into equal-length strings. The length argument to
-// the constructor must be greater than 0.
-//
-// Note: this delimiter works with single-byte string data, but does not work
-// with variable-width encodings, such as UTF-8.
-//
-// Example:
-//
-//   using absl::ByLength;
-//   std::vector<std::string> v = absl::StrSplit("123456789", ByLength(3));
-
-//   // v[0] == "123", v[1] == "456", v[2] == "789"
-//
-// Note that the string does not have to be a multiple of the fixed split
-// length. In such a case, the last substring will be shorter.
-//
-//   using absl::ByLength;
-//   std::vector<std::string> v = absl::StrSplit("12345", ByLength(2));
-//
-//   // v[0] == "12", v[1] == "34", v[2] == "5"
-class ByLength {
- public:
-  explicit ByLength(ptrdiff_t length);
-  absl::string_view Find(absl::string_view text, size_t pos) const;
-
- private:
-  const ptrdiff_t length_;
-};
-
-namespace strings_internal {
-
-// A traits-like metafunction for selecting the default Delimiter object type
-// for a particular Delimiter type. The base case simply exposes type Delimiter
-// itself as the delimiter's Type. However, there are specializations for
-// string-like objects that map them to the ByString delimiter object.
-// This allows functions like absl::StrSplit() and absl::MaxSplits() to accept
-// string-like objects (e.g., ',') as delimiter arguments but they will be
-// treated as if a ByString delimiter was given.
-template <typename Delimiter>
-struct SelectDelimiter {
-  using type = Delimiter;
-};
-
-template <>
-struct SelectDelimiter<char> {
-  using type = ByChar;
-};
-template <>
-struct SelectDelimiter<char*> {
-  using type = ByString;
-};
-template <>
-struct SelectDelimiter<const char*> {
-  using type = ByString;
-};
-template <>
-struct SelectDelimiter<absl::string_view> {
-  using type = ByString;
-};
-template <>
-struct SelectDelimiter<std::string> {
-  using type = ByString;
-};
-
-// Wraps another delimiter and sets a max number of matches for that delimiter.
-template <typename Delimiter>
-class MaxSplitsImpl {
- public:
-  MaxSplitsImpl(Delimiter delimiter, int limit)
-      : delimiter_(delimiter), limit_(limit), count_(0) {}
-  absl::string_view Find(absl::string_view text, size_t pos) {
-    if (count_++ == limit_) {
-      return absl::string_view(text.data() + text.size(),
-                               0);  // No more matches.
-    }
-    return delimiter_.Find(text, pos);
-  }
-
- private:
-  Delimiter delimiter_;
-  const int limit_;
-  int count_;
-};
-
-}  // namespace strings_internal
-
-// MaxSplits()
-//
-// A delimiter that limits the number of matches which can occur to the passed
-// `limit`. The last element in the returned collection will contain all
-// remaining unsplit pieces, which may contain instances of the delimiter.
-// The collection will contain at most `limit` + 1 elements.
-// Example:
-//
-//   using absl::MaxSplits;
-//   std::vector<std::string> v = absl::StrSplit("a,b,c", MaxSplits(',', 1));
-//
-//   // v[0] == "a", v[1] == "b,c"
-template <typename Delimiter>
-inline strings_internal::MaxSplitsImpl<
-    typename strings_internal::SelectDelimiter<Delimiter>::type>
-MaxSplits(Delimiter delimiter, int limit) {
-  typedef
-      typename strings_internal::SelectDelimiter<Delimiter>::type DelimiterType;
-  return strings_internal::MaxSplitsImpl<DelimiterType>(
-      DelimiterType(delimiter), limit);
-}
-
-//------------------------------------------------------------------------------
-// Predicates
-//------------------------------------------------------------------------------
-//
-// Predicates filter the results of a `StrSplit()` by determining whether or not
-// a resultant element is included in the result set. A predicate may be passed
-// as an optional third argument to the `StrSplit()` function.
-//
-// Predicates are unary functions (or functors) that take a single
-// `absl::string_view` argument and return a bool indicating whether the
-// argument should be included (`true`) or excluded (`false`).
-//
-// Predicates are useful when filtering out empty substrings. By default, empty
-// substrings may be returned by `StrSplit()`, which is similar to the way split
-// functions work in other programming languages.
-
-// AllowEmpty()
-//
-// Always returns `true`, indicating that all strings--including empty
-// strings--should be included in the split output. This predicate is not
-// strictly needed because this is the default behavior of `StrSplit()`;
-// however, it might be useful at some call sites to make the intent explicit.
-//
-// Example:
-//
-//  std::vector<std::string> v = absl::StrSplit(" a , ,,b,", ',', AllowEmpty());
-//
-//  // v[0] == " a ", v[1] == " ", v[2] == "", v[3] = "b", v[4] == ""
-struct AllowEmpty {
-  bool operator()(absl::string_view) const { return true; }
-};
-
-// SkipEmpty()
-//
-// Returns `false` if the given `absl::string_view` is empty, indicating that
-// `StrSplit()` should omit the empty string.
-//
-// Example:
-//
-//   std::vector<std::string> v = absl::StrSplit(",a,,b,", ',', SkipEmpty());
-//
-//   // v[0] == "a", v[1] == "b"
-//
-// Note: `SkipEmpty()` does not consider a string containing only whitespace
-// to be empty. To skip such whitespace as well, use the `SkipWhitespace()`
-// predicate.
-struct SkipEmpty {
-  bool operator()(absl::string_view sp) const { return !sp.empty(); }
-};
-
-// SkipWhitespace()
-//
-// Returns `false` if the given `absl::string_view` is empty *or* contains only
-// whitespace, indicating that `StrSplit()` should omit the string.
-//
-// Example:
-//
-//   std::vector<std::string> v = absl::StrSplit(" a , ,,b,",
-//                                               ',', SkipWhitespace());
-//   // v[0] == " a ", v[1] == "b"
-//
-//   // SkipEmpty() would return whitespace elements
-//   std::vector<std::string> v = absl::StrSplit(" a , ,,b,", ',', SkipEmpty());
-//   // v[0] == " a ", v[1] == " ", v[2] == "b"
-struct SkipWhitespace {
-  bool operator()(absl::string_view sp) const {
-    sp = absl::StripAsciiWhitespace(sp);
-    return !sp.empty();
-  }
-};
-
-template <typename T>
-using EnableSplitIfString =
-    typename std::enable_if<std::is_same<T, std::string>::value ||
-                            std::is_same<T, const std::string>::value,
-                            int>::type;
-
-//------------------------------------------------------------------------------
-//                                  StrSplit()
-//------------------------------------------------------------------------------
-
-// StrSplit()
-//
-// Splits a given string based on the provided `Delimiter` object, returning the
-// elements within the type specified by the caller. Optionally, you may pass a
-// `Predicate` to `StrSplit()` indicating whether to include or exclude the
-// resulting element within the final result set. (See the overviews for
-// Delimiters and Predicates above.)
-//
-// Example:
-//
-//   std::vector<std::string> v = absl::StrSplit("a,b,c,d", ',');
-//   // v[0] == "a", v[1] == "b", v[2] == "c", v[3] == "d"
-//
-// You can also provide an explicit `Delimiter` object:
-//
-// Example:
-//
-//   using absl::ByAnyChar;
-//   std::vector<std::string> v = absl::StrSplit("a,b=c", ByAnyChar(",="));
-//   // v[0] == "a", v[1] == "b", v[2] == "c"
-//
-// See above for more information on delimiters.
-//
-// By default, empty strings are included in the result set. You can optionally
-// include a third `Predicate` argument to apply a test for whether the
-// resultant element should be included in the result set:
-//
-// Example:
-//
-//   std::vector<std::string> v = absl::StrSplit(" a , ,,b,",
-//                                               ',', SkipWhitespace());
-//   // v[0] == " a ", v[1] == "b"
-//
-// See above for more information on predicates.
-//
-//------------------------------------------------------------------------------
-// StrSplit() Return Types
-//------------------------------------------------------------------------------
-//
-// The `StrSplit()` function adapts the returned collection to the collection
-// specified by the caller (e.g. `std::vector` above). The returned collections
-// may contain `std::string`, `absl::string_view` (in which case the original
-// string being split must ensure that it outlives the collection), or any
-// object that can be explicitly created from an `absl::string_view`. This
-// behavior works for:
-//
-// 1) All standard STL containers including `std::vector`, `std::list`,
-//    `std::deque`, `std::set`,`std::multiset`, 'std::map`, and `std::multimap`
-// 2) `std::pair` (which is not actually a container). See below.
-//
-// Example:
-//
-//   // The results are returned as `absl::string_view` objects. Note that we
-//   // have to ensure that the input string outlives any results.
-//   std::vector<absl::string_view> v = absl::StrSplit("a,b,c", ',');
-//
-//   // Stores results in a std::set<std::string>, which also performs
-//   // de-duplication and orders the elements in ascending order.
-//   std::set<std::string> a = absl::StrSplit("b,a,c,a,b", ',');
-//   // v[0] == "a", v[1] == "b", v[2] = "c"
-//
-//   // `StrSplit()` can be used within a range-based for loop, in which case
-//   // each element will be of type `absl::string_view`.
-//   std::vector<std::string> v;
-//   for (const auto sv : absl::StrSplit("a,b,c", ',')) {
-//     if (sv != "b") v.emplace_back(sv);
-//   }
-//   // v[0] == "a", v[1] == "c"
-//
-//   // Stores results in a map. The map implementation assumes that the input
-//   // is provided as a series of key/value pairs. For example, the 0th element
-//   // resulting from the split will be stored as a key to the 1st element. If
-//   // an odd number of elements are resolved, the last element is paired with
-//   // a default-constructed value (e.g., empty string).
-//   std::map<std::string, std::string> m = absl::StrSplit("a,b,c", ',');
-//   // m["a"] == "b", m["c"] == ""     // last component value equals ""
-//
-// Splitting to `std::pair` is an interesting case because it can hold only two
-// elements and is not a collection type. When splitting to a `std::pair` the
-// first two split strings become the `std::pair` `.first` and `.second`
-// members, respectively. The remaining split substrings are discarded. If there
-// are less than two split substrings, the empty string is used for the
-// corresponding
-// `std::pair` member.
-//
-// Example:
-//
-//   // Stores first two split strings as the members in a std::pair.
-//   std::pair<std::string, std::string> p = absl::StrSplit("a,b,c", ',');
-//   // p.first == "a", p.second == "b"       // "c" is omitted.
-//
-// The `StrSplit()` function can be used multiple times to perform more
-// complicated splitting logic, such as intelligently parsing key-value pairs.
-//
-// Example:
-//
-//   // The input string "a=b=c,d=e,f=,g" becomes
-//   // { "a" => "b=c", "d" => "e", "f" => "", "g" => "" }
-//   std::map<std::string, std::string> m;
-//   for (absl::string_view sp : absl::StrSplit("a=b=c,d=e,f=,g", ',')) {
-//     m.insert(absl::StrSplit(sp, absl::MaxSplits('=', 1)));
-//   }
-//   EXPECT_EQ("b=c", m.find("a")->second);
-//   EXPECT_EQ("e", m.find("d")->second);
-//   EXPECT_EQ("", m.find("f")->second);
-//   EXPECT_EQ("", m.find("g")->second);
-//
-// WARNING: Due to a legacy bug that is maintained for backward compatibility,
-// splitting the following empty string_views produces different results:
-//
-//   absl::StrSplit(absl::string_view(""), '-');  // {""}
-//   absl::StrSplit(absl::string_view(), '-');    // {}, but should be {""}
-//
-// Try not to depend on this distinction because the bug may one day be fixed.
-template <typename Delimiter>
-strings_internal::Splitter<
-    typename strings_internal::SelectDelimiter<Delimiter>::type, AllowEmpty,
-    absl::string_view>
-StrSplit(strings_internal::ConvertibleToStringView text, Delimiter d) {
-  using DelimiterType =
-      typename strings_internal::SelectDelimiter<Delimiter>::type;
-  return strings_internal::Splitter<DelimiterType, AllowEmpty,
-                                    absl::string_view>(
-      text.value(), DelimiterType(d), AllowEmpty());
-}
-
-template <typename Delimiter, typename StringType,
-          EnableSplitIfString<StringType> = 0>
-strings_internal::Splitter<
-    typename strings_internal::SelectDelimiter<Delimiter>::type, AllowEmpty,
-    std::string>
-StrSplit(StringType&& text, Delimiter d) {
-  using DelimiterType =
-      typename strings_internal::SelectDelimiter<Delimiter>::type;
-  return strings_internal::Splitter<DelimiterType, AllowEmpty, std::string>(
-      std::move(text), DelimiterType(d), AllowEmpty());
-}
-
-template <typename Delimiter, typename Predicate>
-strings_internal::Splitter<
-    typename strings_internal::SelectDelimiter<Delimiter>::type, Predicate,
-    absl::string_view>
-StrSplit(strings_internal::ConvertibleToStringView text, Delimiter d,
-         Predicate p) {
-  using DelimiterType =
-      typename strings_internal::SelectDelimiter<Delimiter>::type;
-  return strings_internal::Splitter<DelimiterType, Predicate,
-                                    absl::string_view>(
-      text.value(), DelimiterType(d), std::move(p));
-}
-
-template <typename Delimiter, typename Predicate, typename StringType,
-          EnableSplitIfString<StringType> = 0>
-strings_internal::Splitter<
-    typename strings_internal::SelectDelimiter<Delimiter>::type, Predicate,
-    std::string>
-StrSplit(StringType&& text, Delimiter d, Predicate p) {
-  using DelimiterType =
-      typename strings_internal::SelectDelimiter<Delimiter>::type;
-  return strings_internal::Splitter<DelimiterType, Predicate, std::string>(
-      std::move(text), DelimiterType(d), std::move(p));
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STR_SPLIT_H_
diff --git a/third_party/abseil/absl/strings/str_split_benchmark.cc b/third_party/abseil/absl/strings/str_split_benchmark.cc
deleted file mode 100644
index f38dfcf..0000000
--- a/third_party/abseil/absl/strings/str_split_benchmark.cc
+++ /dev/null
@@ -1,180 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_split.h"
-
-#include <iterator>
-#include <string>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/string_view.h"
-
-namespace {
-
-std::string MakeTestString(int desired_length) {
-  static const int kAverageValueLen = 25;
-  std::string test(desired_length * kAverageValueLen, 'x');
-  for (int i = 1; i < test.size(); i += kAverageValueLen) {
-    test[i] = ';';
-  }
-  return test;
-}
-
-void BM_Split2StringView(benchmark::State& state) {
-  std::string test = MakeTestString(state.range(0));
-  for (auto _ : state) {
-    std::vector<absl::string_view> result = absl::StrSplit(test, ';');
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_Split2StringView, 0, 1 << 20);
-
-static const absl::string_view kDelimiters = ";:,.";
-
-std::string MakeMultiDelimiterTestString(int desired_length) {
-  static const int kAverageValueLen = 25;
-  std::string test(desired_length * kAverageValueLen, 'x');
-  for (int i = 0; i * kAverageValueLen < test.size(); ++i) {
-    // Cycle through a variety of delimiters.
-    test[i * kAverageValueLen] = kDelimiters[i % kDelimiters.size()];
-  }
-  return test;
-}
-
-// Measure StrSplit with ByAnyChar with four delimiters to choose from.
-void BM_Split2StringViewByAnyChar(benchmark::State& state) {
-  std::string test = MakeMultiDelimiterTestString(state.range(0));
-  for (auto _ : state) {
-    std::vector<absl::string_view> result =
-        absl::StrSplit(test, absl::ByAnyChar(kDelimiters));
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_Split2StringViewByAnyChar, 0, 1 << 20);
-
-void BM_Split2StringViewLifted(benchmark::State& state) {
-  std::string test = MakeTestString(state.range(0));
-  std::vector<absl::string_view> result;
-  for (auto _ : state) {
-    result = absl::StrSplit(test, ';');
-  }
-  benchmark::DoNotOptimize(result);
-}
-BENCHMARK_RANGE(BM_Split2StringViewLifted, 0, 1 << 20);
-
-void BM_Split2String(benchmark::State& state) {
-  std::string test = MakeTestString(state.range(0));
-  for (auto _ : state) {
-    std::vector<std::string> result = absl::StrSplit(test, ';');
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_Split2String, 0, 1 << 20);
-
-// This benchmark is for comparing Split2 to Split1 (SplitStringUsing). In
-// particular, this benchmark uses SkipEmpty() to match SplitStringUsing's
-// behavior.
-void BM_Split2SplitStringUsing(benchmark::State& state) {
-  std::string test = MakeTestString(state.range(0));
-  for (auto _ : state) {
-    std::vector<std::string> result =
-        absl::StrSplit(test, ';', absl::SkipEmpty());
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_Split2SplitStringUsing, 0, 1 << 20);
-
-void BM_SplitStringToUnorderedSet(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string test(len, 'x');
-  for (int i = 1; i < len; i += 2) {
-    test[i] = ';';
-  }
-  for (auto _ : state) {
-    std::unordered_set<std::string> result =
-        absl::StrSplit(test, ':', absl::SkipEmpty());
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_SplitStringToUnorderedSet, 0, 1 << 20);
-
-void BM_SplitStringToUnorderedMap(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string test(len, 'x');
-  for (int i = 1; i < len; i += 2) {
-    test[i] = ';';
-  }
-  for (auto _ : state) {
-    std::unordered_map<std::string, std::string> result =
-        absl::StrSplit(test, ':', absl::SkipEmpty());
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_SplitStringToUnorderedMap, 0, 1 << 20);
-
-void BM_SplitStringAllowEmpty(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string test(len, 'x');
-  for (int i = 1; i < len; i += 2) {
-    test[i] = ';';
-  }
-  for (auto _ : state) {
-    std::vector<std::string> result = absl::StrSplit(test, ';');
-    benchmark::DoNotOptimize(result);
-  }
-}
-BENCHMARK_RANGE(BM_SplitStringAllowEmpty, 0, 1 << 20);
-
-struct OneCharLiteral {
-  char operator()() const { return 'X'; }
-};
-
-struct OneCharStringLiteral {
-  const char* operator()() const { return "X"; }
-};
-
-template <typename DelimiterFactory>
-void BM_SplitStringWithOneChar(benchmark::State& state) {
-  const auto delimiter = DelimiterFactory()();
-  std::vector<absl::string_view> pieces;
-  size_t v = 0;
-  for (auto _ : state) {
-    pieces = absl::StrSplit("The quick brown fox jumps over the lazy dog",
-                            delimiter);
-    v += pieces.size();
-  }
-  ABSL_RAW_CHECK(v == state.iterations(), "");
-}
-BENCHMARK_TEMPLATE(BM_SplitStringWithOneChar, OneCharLiteral);
-BENCHMARK_TEMPLATE(BM_SplitStringWithOneChar, OneCharStringLiteral);
-
-template <typename DelimiterFactory>
-void BM_SplitStringWithOneCharNoVector(benchmark::State& state) {
-  const auto delimiter = DelimiterFactory()();
-  size_t v = 0;
-  for (auto _ : state) {
-    auto splitter = absl::StrSplit(
-        "The quick brown fox jumps over the lazy dog", delimiter);
-    v += std::distance(splitter.begin(), splitter.end());
-  }
-  ABSL_RAW_CHECK(v == state.iterations(), "");
-}
-BENCHMARK_TEMPLATE(BM_SplitStringWithOneCharNoVector, OneCharLiteral);
-BENCHMARK_TEMPLATE(BM_SplitStringWithOneCharNoVector, OneCharStringLiteral);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/str_split_test.cc b/third_party/abseil/absl/strings/str_split_test.cc
deleted file mode 100644
index 7f7c097..0000000
--- a/third_party/abseil/absl/strings/str_split_test.cc
+++ /dev/null
@@ -1,953 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/str_split.h"
-
-#include <deque>
-#include <initializer_list>
-#include <list>
-#include <map>
-#include <memory>
-#include <string>
-#include <type_traits>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/macros.h"
-#include "absl/container/flat_hash_map.h"
-#include "absl/container/node_hash_map.h"
-#include "absl/strings/numbers.h"
-
-namespace {
-
-using ::testing::ElementsAre;
-using ::testing::Pair;
-using ::testing::UnorderedElementsAre;
-
-TEST(Split, TraitsTest) {
-  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<int>::value,
-                "");
-  static_assert(
-      !absl::strings_internal::SplitterIsConvertibleTo<std::string>::value, "");
-  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
-                    std::vector<std::string>>::value,
-                "");
-  static_assert(
-      !absl::strings_internal::SplitterIsConvertibleTo<std::vector<int>>::value,
-      "");
-  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
-                    std::vector<absl::string_view>>::value,
-                "");
-  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
-                    std::map<std::string, std::string>>::value,
-                "");
-  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
-                    std::map<absl::string_view, absl::string_view>>::value,
-                "");
-  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<
-                    std::map<int, std::string>>::value,
-                "");
-  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<
-                    std::map<std::string, int>>::value,
-                "");
-}
-
-// This tests the overall split API, which is made up of the absl::StrSplit()
-// function and the Delimiter objects in the absl:: namespace.
-// This TEST macro is outside of any namespace to require full specification of
-// namespaces just like callers will need to use.
-TEST(Split, APIExamples) {
-  {
-    // Passes string delimiter. Assumes the default of ByString.
-    std::vector<std::string> v = absl::StrSplit("a,b,c", ",");  // NOLINT
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-
-    // Equivalent to...
-    using absl::ByString;
-    v = absl::StrSplit("a,b,c", ByString(","));
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-
-    // Equivalent to...
-    EXPECT_THAT(absl::StrSplit("a,b,c", ByString(",")),
-                ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Same as above, but using a single character as the delimiter.
-    std::vector<std::string> v = absl::StrSplit("a,b,c", ',');
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-
-    // Equivalent to...
-    using absl::ByChar;
-    v = absl::StrSplit("a,b,c", ByChar(','));
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Uses the Literal string "=>" as the delimiter.
-    const std::vector<std::string> v = absl::StrSplit("a=>b=>c", "=>");
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // The substrings are returned as string_views, eliminating copying.
-    std::vector<absl::string_view> v = absl::StrSplit("a,b,c", ',');
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Leading and trailing empty substrings.
-    std::vector<std::string> v = absl::StrSplit(",a,b,c,", ',');
-    EXPECT_THAT(v, ElementsAre("", "a", "b", "c", ""));
-  }
-
-  {
-    // Splits on a delimiter that is not found.
-    std::vector<std::string> v = absl::StrSplit("abc", ',');
-    EXPECT_THAT(v, ElementsAre("abc"));
-  }
-
-  {
-    // Splits the input string into individual characters by using an empty
-    // string as the delimiter.
-    std::vector<std::string> v = absl::StrSplit("abc", "");
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Splits string data with embedded NUL characters, using NUL as the
-    // delimiter. A simple delimiter of "\0" doesn't work because strlen() will
-    // say that's the empty string when constructing the absl::string_view
-    // delimiter. Instead, a non-empty string containing NUL can be used as the
-    // delimiter.
-    std::string embedded_nulls("a\0b\0c", 5);
-    std::string null_delim("\0", 1);
-    std::vector<std::string> v = absl::StrSplit(embedded_nulls, null_delim);
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Stores first two split strings as the members in a std::pair.
-    std::pair<std::string, std::string> p = absl::StrSplit("a,b,c", ',');
-    EXPECT_EQ("a", p.first);
-    EXPECT_EQ("b", p.second);
-    // "c" is omitted because std::pair can hold only two elements.
-  }
-
-  {
-    // Results stored in std::set<std::string>
-    std::set<std::string> v = absl::StrSplit("a,b,c,a,b,c,a,b,c", ',');
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Uses a non-const char* delimiter.
-    char a[] = ",";
-    char* d = a + 0;
-    std::vector<std::string> v = absl::StrSplit("a,b,c", d);
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Results split using either of , or ;
-    using absl::ByAnyChar;
-    std::vector<std::string> v = absl::StrSplit("a,b;c", ByAnyChar(",;"));
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Uses the SkipWhitespace predicate.
-    using absl::SkipWhitespace;
-    std::vector<std::string> v =
-        absl::StrSplit(" a , ,,b,", ',', SkipWhitespace());
-    EXPECT_THAT(v, ElementsAre(" a ", "b"));
-  }
-
-  {
-    // Uses the ByLength delimiter.
-    using absl::ByLength;
-    std::vector<std::string> v = absl::StrSplit("abcdefg", ByLength(3));
-    EXPECT_THAT(v, ElementsAre("abc", "def", "g"));
-  }
-
-  {
-    // Different forms of initialization / conversion.
-    std::vector<std::string> v1 = absl::StrSplit("a,b,c", ',');
-    EXPECT_THAT(v1, ElementsAre("a", "b", "c"));
-    std::vector<std::string> v2(absl::StrSplit("a,b,c", ','));
-    EXPECT_THAT(v2, ElementsAre("a", "b", "c"));
-    auto v3 = std::vector<std::string>(absl::StrSplit("a,b,c", ','));
-    EXPECT_THAT(v3, ElementsAre("a", "b", "c"));
-    v3 = absl::StrSplit("a,b,c", ',');
-    EXPECT_THAT(v3, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Results stored in a std::map.
-    std::map<std::string, std::string> m = absl::StrSplit("a,1,b,2,a,3", ',');
-    EXPECT_EQ(2, m.size());
-    EXPECT_EQ("3", m["a"]);
-    EXPECT_EQ("2", m["b"]);
-  }
-
-  {
-    // Results stored in a std::multimap.
-    std::multimap<std::string, std::string> m =
-        absl::StrSplit("a,1,b,2,a,3", ',');
-    EXPECT_EQ(3, m.size());
-    auto it = m.find("a");
-    EXPECT_EQ("1", it->second);
-    ++it;
-    EXPECT_EQ("3", it->second);
-    it = m.find("b");
-    EXPECT_EQ("2", it->second);
-  }
-
-  {
-    // Demonstrates use in a range-based for loop in C++11.
-    std::string s = "x,x,x,x,x,x,x";
-    for (absl::string_view sp : absl::StrSplit(s, ',')) {
-      EXPECT_EQ("x", sp);
-    }
-  }
-
-  {
-    // Demonstrates use with a Predicate in a range-based for loop.
-    using absl::SkipWhitespace;
-    std::string s = " ,x,,x,,x,x,x,,";
-    for (absl::string_view sp : absl::StrSplit(s, ',', SkipWhitespace())) {
-      EXPECT_EQ("x", sp);
-    }
-  }
-
-  {
-    // Demonstrates a "smart" split to std::map using two separate calls to
-    // absl::StrSplit. One call to split the records, and another call to split
-    // the keys and values. This also uses the Limit delimiter so that the
-    // std::string "a=b=c" will split to "a" -> "b=c".
-    std::map<std::string, std::string> m;
-    for (absl::string_view sp : absl::StrSplit("a=b=c,d=e,f=,g", ',')) {
-      m.insert(absl::StrSplit(sp, absl::MaxSplits('=', 1)));
-    }
-    EXPECT_EQ("b=c", m.find("a")->second);
-    EXPECT_EQ("e", m.find("d")->second);
-    EXPECT_EQ("", m.find("f")->second);
-    EXPECT_EQ("", m.find("g")->second);
-  }
-}
-
-//
-// Tests for SplitIterator
-//
-
-TEST(SplitIterator, Basics) {
-  auto splitter = absl::StrSplit("a,b", ',');
-  auto it = splitter.begin();
-  auto end = splitter.end();
-
-  EXPECT_NE(it, end);
-  EXPECT_EQ("a", *it);  // tests dereference
-  ++it;                 // tests preincrement
-  EXPECT_NE(it, end);
-  EXPECT_EQ("b",
-            std::string(it->data(), it->size()));  // tests dereference as ptr
-  it++;                                            // tests postincrement
-  EXPECT_EQ(it, end);
-}
-
-// Simple Predicate to skip a particular string.
-class Skip {
- public:
-  explicit Skip(const std::string& s) : s_(s) {}
-  bool operator()(absl::string_view sp) { return sp != s_; }
-
- private:
-  std::string s_;
-};
-
-TEST(SplitIterator, Predicate) {
-  auto splitter = absl::StrSplit("a,b,c", ',', Skip("b"));
-  auto it = splitter.begin();
-  auto end = splitter.end();
-
-  EXPECT_NE(it, end);
-  EXPECT_EQ("a", *it);  // tests dereference
-  ++it;                 // tests preincrement -- "b" should be skipped here.
-  EXPECT_NE(it, end);
-  EXPECT_EQ("c",
-            std::string(it->data(), it->size()));  // tests dereference as ptr
-  it++;                                            // tests postincrement
-  EXPECT_EQ(it, end);
-}
-
-TEST(SplitIterator, EdgeCases) {
-  // Expected input and output, assuming a delimiter of ','
-  struct {
-    std::string in;
-    std::vector<std::string> expect;
-  } specs[] = {
-      {"", {""}},
-      {"foo", {"foo"}},
-      {",", {"", ""}},
-      {",foo", {"", "foo"}},
-      {"foo,", {"foo", ""}},
-      {",foo,", {"", "foo", ""}},
-      {"foo,bar", {"foo", "bar"}},
-  };
-
-  for (const auto& spec : specs) {
-    SCOPED_TRACE(spec.in);
-    auto splitter = absl::StrSplit(spec.in, ',');
-    auto it = splitter.begin();
-    auto end = splitter.end();
-    for (const auto& expected : spec.expect) {
-      EXPECT_NE(it, end);
-      EXPECT_EQ(expected, *it++);
-    }
-    EXPECT_EQ(it, end);
-  }
-}
-
-TEST(Splitter, Const) {
-  const auto splitter = absl::StrSplit("a,b,c", ',');
-  EXPECT_THAT(splitter, ElementsAre("a", "b", "c"));
-}
-
-TEST(Split, EmptyAndNull) {
-  // Attention: Splitting a null absl::string_view is different than splitting
-  // an empty absl::string_view even though both string_views are considered
-  // equal. This behavior is likely surprising and undesirable. However, to
-  // maintain backward compatibility, there is a small "hack" in
-  // str_split_internal.h that preserves this behavior. If that behavior is ever
-  // changed/fixed, this test will need to be updated.
-  EXPECT_THAT(absl::StrSplit(absl::string_view(""), '-'), ElementsAre(""));
-  EXPECT_THAT(absl::StrSplit(absl::string_view(), '-'), ElementsAre());
-}
-
-TEST(SplitIterator, EqualityAsEndCondition) {
-  auto splitter = absl::StrSplit("a,b,c", ',');
-  auto it = splitter.begin();
-  auto it2 = it;
-
-  // Increments it2 twice to point to "c" in the input text.
-  ++it2;
-  ++it2;
-  EXPECT_EQ("c", *it2);
-
-  // This test uses a non-end SplitIterator as the terminating condition in a
-  // for loop. This relies on SplitIterator equality for non-end SplitIterators
-  // working correctly. At this point it2 points to "c", and we use that as the
-  // "end" condition in this test.
-  std::vector<absl::string_view> v;
-  for (; it != it2; ++it) {
-    v.push_back(*it);
-  }
-  EXPECT_THAT(v, ElementsAre("a", "b"));
-}
-
-//
-// Tests for Splitter
-//
-
-TEST(Splitter, RangeIterators) {
-  auto splitter = absl::StrSplit("a,b,c", ',');
-  std::vector<absl::string_view> output;
-  for (const absl::string_view& p : splitter) {
-    output.push_back(p);
-  }
-  EXPECT_THAT(output, ElementsAre("a", "b", "c"));
-}
-
-// Some template functions for use in testing conversion operators
-template <typename ContainerType, typename Splitter>
-void TestConversionOperator(const Splitter& splitter) {
-  ContainerType output = splitter;
-  EXPECT_THAT(output, UnorderedElementsAre("a", "b", "c", "d"));
-}
-
-template <typename MapType, typename Splitter>
-void TestMapConversionOperator(const Splitter& splitter) {
-  MapType m = splitter;
-  EXPECT_THAT(m, UnorderedElementsAre(Pair("a", "b"), Pair("c", "d")));
-}
-
-template <typename FirstType, typename SecondType, typename Splitter>
-void TestPairConversionOperator(const Splitter& splitter) {
-  std::pair<FirstType, SecondType> p = splitter;
-  EXPECT_EQ(p, (std::pair<FirstType, SecondType>("a", "b")));
-}
-
-TEST(Splitter, ConversionOperator) {
-  auto splitter = absl::StrSplit("a,b,c,d", ',');
-
-  TestConversionOperator<std::vector<absl::string_view>>(splitter);
-  TestConversionOperator<std::vector<std::string>>(splitter);
-  TestConversionOperator<std::list<absl::string_view>>(splitter);
-  TestConversionOperator<std::list<std::string>>(splitter);
-  TestConversionOperator<std::deque<absl::string_view>>(splitter);
-  TestConversionOperator<std::deque<std::string>>(splitter);
-  TestConversionOperator<std::set<absl::string_view>>(splitter);
-  TestConversionOperator<std::set<std::string>>(splitter);
-  TestConversionOperator<std::multiset<absl::string_view>>(splitter);
-  TestConversionOperator<std::multiset<std::string>>(splitter);
-  TestConversionOperator<std::unordered_set<std::string>>(splitter);
-
-  // Tests conversion to map-like objects.
-
-  TestMapConversionOperator<std::map<absl::string_view, absl::string_view>>(
-      splitter);
-  TestMapConversionOperator<std::map<absl::string_view, std::string>>(splitter);
-  TestMapConversionOperator<std::map<std::string, absl::string_view>>(splitter);
-  TestMapConversionOperator<std::map<std::string, std::string>>(splitter);
-  TestMapConversionOperator<
-      std::multimap<absl::string_view, absl::string_view>>(splitter);
-  TestMapConversionOperator<std::multimap<absl::string_view, std::string>>(
-      splitter);
-  TestMapConversionOperator<std::multimap<std::string, absl::string_view>>(
-      splitter);
-  TestMapConversionOperator<std::multimap<std::string, std::string>>(splitter);
-  TestMapConversionOperator<std::unordered_map<std::string, std::string>>(
-      splitter);
-  TestMapConversionOperator<
-      absl::node_hash_map<absl::string_view, absl::string_view>>(splitter);
-  TestMapConversionOperator<
-      absl::node_hash_map<absl::string_view, std::string>>(splitter);
-  TestMapConversionOperator<
-      absl::node_hash_map<std::string, absl::string_view>>(splitter);
-  TestMapConversionOperator<
-      absl::flat_hash_map<absl::string_view, absl::string_view>>(splitter);
-  TestMapConversionOperator<
-      absl::flat_hash_map<absl::string_view, std::string>>(splitter);
-  TestMapConversionOperator<
-      absl::flat_hash_map<std::string, absl::string_view>>(splitter);
-
-  // Tests conversion to std::pair
-
-  TestPairConversionOperator<absl::string_view, absl::string_view>(splitter);
-  TestPairConversionOperator<absl::string_view, std::string>(splitter);
-  TestPairConversionOperator<std::string, absl::string_view>(splitter);
-  TestPairConversionOperator<std::string, std::string>(splitter);
-}
-
-// A few additional tests for conversion to std::pair. This conversion is
-// different from others because a std::pair always has exactly two elements:
-// .first and .second. The split has to work even when the split has
-// less-than, equal-to, and more-than 2 strings.
-TEST(Splitter, ToPair) {
-  {
-    // Empty string
-    std::pair<std::string, std::string> p = absl::StrSplit("", ',');
-    EXPECT_EQ("", p.first);
-    EXPECT_EQ("", p.second);
-  }
-
-  {
-    // Only first
-    std::pair<std::string, std::string> p = absl::StrSplit("a", ',');
-    EXPECT_EQ("a", p.first);
-    EXPECT_EQ("", p.second);
-  }
-
-  {
-    // Only second
-    std::pair<std::string, std::string> p = absl::StrSplit(",b", ',');
-    EXPECT_EQ("", p.first);
-    EXPECT_EQ("b", p.second);
-  }
-
-  {
-    // First and second.
-    std::pair<std::string, std::string> p = absl::StrSplit("a,b", ',');
-    EXPECT_EQ("a", p.first);
-    EXPECT_EQ("b", p.second);
-  }
-
-  {
-    // First and second and then more stuff that will be ignored.
-    std::pair<std::string, std::string> p = absl::StrSplit("a,b,c", ',');
-    EXPECT_EQ("a", p.first);
-    EXPECT_EQ("b", p.second);
-    // "c" is omitted.
-  }
-}
-
-TEST(Splitter, Predicates) {
-  static const char kTestChars[] = ",a, ,b,";
-  using absl::AllowEmpty;
-  using absl::SkipEmpty;
-  using absl::SkipWhitespace;
-
-  {
-    // No predicate. Does not skip empties.
-    auto splitter = absl::StrSplit(kTestChars, ',');
-    std::vector<std::string> v = splitter;
-    EXPECT_THAT(v, ElementsAre("", "a", " ", "b", ""));
-  }
-
-  {
-    // Allows empty strings. Same behavior as no predicate at all.
-    auto splitter = absl::StrSplit(kTestChars, ',', AllowEmpty());
-    std::vector<std::string> v_allowempty = splitter;
-    EXPECT_THAT(v_allowempty, ElementsAre("", "a", " ", "b", ""));
-
-    // Ensures AllowEmpty equals the behavior with no predicate.
-    auto splitter_nopredicate = absl::StrSplit(kTestChars, ',');
-    std::vector<std::string> v_nopredicate = splitter_nopredicate;
-    EXPECT_EQ(v_allowempty, v_nopredicate);
-  }
-
-  {
-    // Skips empty strings.
-    auto splitter = absl::StrSplit(kTestChars, ',', SkipEmpty());
-    std::vector<std::string> v = splitter;
-    EXPECT_THAT(v, ElementsAre("a", " ", "b"));
-  }
-
-  {
-    // Skips empty and all-whitespace strings.
-    auto splitter = absl::StrSplit(kTestChars, ',', SkipWhitespace());
-    std::vector<std::string> v = splitter;
-    EXPECT_THAT(v, ElementsAre("a", "b"));
-  }
-}
-
-//
-// Tests for StrSplit()
-//
-
-TEST(Split, Basics) {
-  {
-    // Doesn't really do anything useful because the return value is ignored,
-    // but it should work.
-    absl::StrSplit("a,b,c", ',');
-  }
-
-  {
-    std::vector<absl::string_view> v = absl::StrSplit("a,b,c", ',');
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    std::vector<std::string> v = absl::StrSplit("a,b,c", ',');
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-  }
-
-  {
-    // Ensures that assignment works. This requires a little extra work with
-    // C++11 because of overloads with initializer_list.
-    std::vector<std::string> v;
-    v = absl::StrSplit("a,b,c", ',');
-
-    EXPECT_THAT(v, ElementsAre("a", "b", "c"));
-    std::map<std::string, std::string> m;
-    m = absl::StrSplit("a,b,c", ',');
-    EXPECT_EQ(2, m.size());
-    std::unordered_map<std::string, std::string> hm;
-    hm = absl::StrSplit("a,b,c", ',');
-    EXPECT_EQ(2, hm.size());
-  }
-}
-
-absl::string_view ReturnStringView() { return "Hello World"; }
-const char* ReturnConstCharP() { return "Hello World"; }
-char* ReturnCharP() { return const_cast<char*>("Hello World"); }
-
-TEST(Split, AcceptsCertainTemporaries) {
-  std::vector<std::string> v;
-  v = absl::StrSplit(ReturnStringView(), ' ');
-  EXPECT_THAT(v, ElementsAre("Hello", "World"));
-  v = absl::StrSplit(ReturnConstCharP(), ' ');
-  EXPECT_THAT(v, ElementsAre("Hello", "World"));
-  v = absl::StrSplit(ReturnCharP(), ' ');
-  EXPECT_THAT(v, ElementsAre("Hello", "World"));
-}
-
-TEST(Split, Temporary) {
-  // Use a std::string longer than the SSO length, so that when the temporary is
-  // destroyed, if the splitter keeps a reference to the string's contents,
-  // it'll reference freed memory instead of just dead on-stack memory.
-  const char input[] = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u";
-  EXPECT_LT(sizeof(std::string), ABSL_ARRAYSIZE(input))
-      << "Input should be larger than fits on the stack.";
-
-  // This happens more often in C++11 as part of a range-based for loop.
-  auto splitter = absl::StrSplit(std::string(input), ',');
-  std::string expected = "a";
-  for (absl::string_view letter : splitter) {
-    EXPECT_EQ(expected, letter);
-    ++expected[0];
-  }
-  EXPECT_EQ("v", expected);
-
-  // This happens more often in C++11 as part of a range-based for loop.
-  auto std_splitter = absl::StrSplit(std::string(input), ',');
-  expected = "a";
-  for (absl::string_view letter : std_splitter) {
-    EXPECT_EQ(expected, letter);
-    ++expected[0];
-  }
-  EXPECT_EQ("v", expected);
-}
-
-template <typename T>
-static std::unique_ptr<T> CopyToHeap(const T& value) {
-  return std::unique_ptr<T>(new T(value));
-}
-
-TEST(Split, LvalueCaptureIsCopyable) {
-  std::string input = "a,b";
-  auto heap_splitter = CopyToHeap(absl::StrSplit(input, ','));
-  auto stack_splitter = *heap_splitter;
-  heap_splitter.reset();
-  std::vector<std::string> result = stack_splitter;
-  EXPECT_THAT(result, testing::ElementsAre("a", "b"));
-}
-
-TEST(Split, TemporaryCaptureIsCopyable) {
-  auto heap_splitter = CopyToHeap(absl::StrSplit(std::string("a,b"), ','));
-  auto stack_splitter = *heap_splitter;
-  heap_splitter.reset();
-  std::vector<std::string> result = stack_splitter;
-  EXPECT_THAT(result, testing::ElementsAre("a", "b"));
-}
-
-TEST(Split, SplitterIsCopyableAndMoveable) {
-  auto a = absl::StrSplit("foo", '-');
-
-  // Ensures that the following expressions compile.
-  auto b = a;             // Copy construct
-  auto c = std::move(a);  // Move construct
-  b = c;                  // Copy assign
-  c = std::move(b);       // Move assign
-
-  EXPECT_THAT(c, ElementsAre("foo"));
-}
-
-TEST(Split, StringDelimiter) {
-  {
-    std::vector<absl::string_view> v = absl::StrSplit("a,b", ',');
-    EXPECT_THAT(v, ElementsAre("a", "b"));
-  }
-
-  {
-    std::vector<absl::string_view> v = absl::StrSplit("a,b", std::string(","));
-    EXPECT_THAT(v, ElementsAre("a", "b"));
-  }
-
-  {
-    std::vector<absl::string_view> v =
-        absl::StrSplit("a,b", absl::string_view(","));
-    EXPECT_THAT(v, ElementsAre("a", "b"));
-  }
-}
-
-#if !defined(__cpp_char8_t)
-#if defined(__clang__)
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wc++2a-compat"
-#endif
-TEST(Split, UTF8) {
-  // Tests splitting utf8 strings and utf8 delimiters.
-  std::string utf8_string = u8"\u03BA\u1F79\u03C3\u03BC\u03B5";
-  {
-    // A utf8 input string with an ascii delimiter.
-    std::string to_split = "a," + utf8_string;
-    std::vector<absl::string_view> v = absl::StrSplit(to_split, ',');
-    EXPECT_THAT(v, ElementsAre("a", utf8_string));
-  }
-
-  {
-    // A utf8 input string and a utf8 delimiter.
-    std::string to_split = "a," + utf8_string + ",b";
-    std::string unicode_delimiter = "," + utf8_string + ",";
-    std::vector<absl::string_view> v =
-        absl::StrSplit(to_split, unicode_delimiter);
-    EXPECT_THAT(v, ElementsAre("a", "b"));
-  }
-
-  {
-    // A utf8 input string and ByAnyChar with ascii chars.
-    std::vector<absl::string_view> v =
-        absl::StrSplit(u8"Foo h\u00E4llo th\u4E1Ere", absl::ByAnyChar(" \t"));
-    EXPECT_THAT(v, ElementsAre("Foo", u8"h\u00E4llo", u8"th\u4E1Ere"));
-  }
-}
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-#endif  // !defined(__cpp_char8_t)
-
-TEST(Split, EmptyStringDelimiter) {
-  {
-    std::vector<std::string> v = absl::StrSplit("", "");
-    EXPECT_THAT(v, ElementsAre(""));
-  }
-
-  {
-    std::vector<std::string> v = absl::StrSplit("a", "");
-    EXPECT_THAT(v, ElementsAre("a"));
-  }
-
-  {
-    std::vector<std::string> v = absl::StrSplit("ab", "");
-    EXPECT_THAT(v, ElementsAre("a", "b"));
-  }
-
-  {
-    std::vector<std::string> v = absl::StrSplit("a b", "");
-    EXPECT_THAT(v, ElementsAre("a", " ", "b"));
-  }
-}
-
-TEST(Split, SubstrDelimiter) {
-  std::vector<absl::string_view> results;
-  absl::string_view delim("//");
-
-  results = absl::StrSplit("", delim);
-  EXPECT_THAT(results, ElementsAre(""));
-
-  results = absl::StrSplit("//", delim);
-  EXPECT_THAT(results, ElementsAre("", ""));
-
-  results = absl::StrSplit("ab", delim);
-  EXPECT_THAT(results, ElementsAre("ab"));
-
-  results = absl::StrSplit("ab//", delim);
-  EXPECT_THAT(results, ElementsAre("ab", ""));
-
-  results = absl::StrSplit("ab/", delim);
-  EXPECT_THAT(results, ElementsAre("ab/"));
-
-  results = absl::StrSplit("a/b", delim);
-  EXPECT_THAT(results, ElementsAre("a/b"));
-
-  results = absl::StrSplit("a//b", delim);
-  EXPECT_THAT(results, ElementsAre("a", "b"));
-
-  results = absl::StrSplit("a///b", delim);
-  EXPECT_THAT(results, ElementsAre("a", "/b"));
-
-  results = absl::StrSplit("a////b", delim);
-  EXPECT_THAT(results, ElementsAre("a", "", "b"));
-}
-
-TEST(Split, EmptyResults) {
-  std::vector<absl::string_view> results;
-
-  results = absl::StrSplit("", '#');
-  EXPECT_THAT(results, ElementsAre(""));
-
-  results = absl::StrSplit("#", '#');
-  EXPECT_THAT(results, ElementsAre("", ""));
-
-  results = absl::StrSplit("#cd", '#');
-  EXPECT_THAT(results, ElementsAre("", "cd"));
-
-  results = absl::StrSplit("ab#cd#", '#');
-  EXPECT_THAT(results, ElementsAre("ab", "cd", ""));
-
-  results = absl::StrSplit("ab##cd", '#');
-  EXPECT_THAT(results, ElementsAre("ab", "", "cd"));
-
-  results = absl::StrSplit("ab##", '#');
-  EXPECT_THAT(results, ElementsAre("ab", "", ""));
-
-  results = absl::StrSplit("ab#ab#", '#');
-  EXPECT_THAT(results, ElementsAre("ab", "ab", ""));
-
-  results = absl::StrSplit("aaaa", 'a');
-  EXPECT_THAT(results, ElementsAre("", "", "", "", ""));
-
-  results = absl::StrSplit("", '#', absl::SkipEmpty());
-  EXPECT_THAT(results, ElementsAre());
-}
-
-template <typename Delimiter>
-static bool IsFoundAtStartingPos(absl::string_view text, Delimiter d,
-                                 size_t starting_pos, int expected_pos) {
-  absl::string_view found = d.Find(text, starting_pos);
-  return found.data() != text.data() + text.size() &&
-         expected_pos == found.data() - text.data();
-}
-
-// Helper function for testing Delimiter objects. Returns true if the given
-// Delimiter is found in the given string at the given position. This function
-// tests two cases:
-//   1. The actual text given, staring at position 0
-//   2. The text given with leading padding that should be ignored
-template <typename Delimiter>
-static bool IsFoundAt(absl::string_view text, Delimiter d, int expected_pos) {
-  const std::string leading_text = ",x,y,z,";
-  return IsFoundAtStartingPos(text, d, 0, expected_pos) &&
-         IsFoundAtStartingPos(leading_text + std::string(text), d,
-                              leading_text.length(),
-                              expected_pos + leading_text.length());
-}
-
-//
-// Tests for ByString
-//
-
-// Tests using any delimiter that represents a single comma.
-template <typename Delimiter>
-void TestComma(Delimiter d) {
-  EXPECT_TRUE(IsFoundAt(",", d, 0));
-  EXPECT_TRUE(IsFoundAt("a,", d, 1));
-  EXPECT_TRUE(IsFoundAt(",b", d, 0));
-  EXPECT_TRUE(IsFoundAt("a,b", d, 1));
-  EXPECT_TRUE(IsFoundAt("a,b,", d, 1));
-  EXPECT_TRUE(IsFoundAt("a,b,c", d, 1));
-  EXPECT_FALSE(IsFoundAt("", d, -1));
-  EXPECT_FALSE(IsFoundAt(" ", d, -1));
-  EXPECT_FALSE(IsFoundAt("a", d, -1));
-  EXPECT_FALSE(IsFoundAt("a b c", d, -1));
-  EXPECT_FALSE(IsFoundAt("a;b;c", d, -1));
-  EXPECT_FALSE(IsFoundAt(";", d, -1));
-}
-
-TEST(Delimiter, ByString) {
-  using absl::ByString;
-  TestComma(ByString(","));
-
-  // Works as named variable.
-  ByString comma_string(",");
-  TestComma(comma_string);
-
-  // The first occurrence of empty string ("") in a string is at position 0.
-  // There is a test below that demonstrates this for absl::string_view::find().
-  // If the ByString delimiter returned position 0 for this, there would
-  // be an infinite loop in the SplitIterator code. To avoid this, empty string
-  // is a special case in that it always returns the item at position 1.
-  absl::string_view abc("abc");
-  EXPECT_EQ(0, abc.find(""));  // "" is found at position 0
-  ByString empty("");
-  EXPECT_FALSE(IsFoundAt("", empty, 0));
-  EXPECT_FALSE(IsFoundAt("a", empty, 0));
-  EXPECT_TRUE(IsFoundAt("ab", empty, 1));
-  EXPECT_TRUE(IsFoundAt("abc", empty, 1));
-}
-
-TEST(Split, ByChar) {
-  using absl::ByChar;
-  TestComma(ByChar(','));
-
-  // Works as named variable.
-  ByChar comma_char(',');
-  TestComma(comma_char);
-}
-
-//
-// Tests for ByAnyChar
-//
-
-TEST(Delimiter, ByAnyChar) {
-  using absl::ByAnyChar;
-  ByAnyChar one_delim(",");
-  // Found
-  EXPECT_TRUE(IsFoundAt(",", one_delim, 0));
-  EXPECT_TRUE(IsFoundAt("a,", one_delim, 1));
-  EXPECT_TRUE(IsFoundAt("a,b", one_delim, 1));
-  EXPECT_TRUE(IsFoundAt(",b", one_delim, 0));
-  // Not found
-  EXPECT_FALSE(IsFoundAt("", one_delim, -1));
-  EXPECT_FALSE(IsFoundAt(" ", one_delim, -1));
-  EXPECT_FALSE(IsFoundAt("a", one_delim, -1));
-  EXPECT_FALSE(IsFoundAt("a;b;c", one_delim, -1));
-  EXPECT_FALSE(IsFoundAt(";", one_delim, -1));
-
-  ByAnyChar two_delims(",;");
-  // Found
-  EXPECT_TRUE(IsFoundAt(",", two_delims, 0));
-  EXPECT_TRUE(IsFoundAt(";", two_delims, 0));
-  EXPECT_TRUE(IsFoundAt(",;", two_delims, 0));
-  EXPECT_TRUE(IsFoundAt(";,", two_delims, 0));
-  EXPECT_TRUE(IsFoundAt(",;b", two_delims, 0));
-  EXPECT_TRUE(IsFoundAt(";,b", two_delims, 0));
-  EXPECT_TRUE(IsFoundAt("a;,", two_delims, 1));
-  EXPECT_TRUE(IsFoundAt("a,;", two_delims, 1));
-  EXPECT_TRUE(IsFoundAt("a;,b", two_delims, 1));
-  EXPECT_TRUE(IsFoundAt("a,;b", two_delims, 1));
-  // Not found
-  EXPECT_FALSE(IsFoundAt("", two_delims, -1));
-  EXPECT_FALSE(IsFoundAt(" ", two_delims, -1));
-  EXPECT_FALSE(IsFoundAt("a", two_delims, -1));
-  EXPECT_FALSE(IsFoundAt("a=b=c", two_delims, -1));
-  EXPECT_FALSE(IsFoundAt("=", two_delims, -1));
-
-  // ByAnyChar behaves just like ByString when given a delimiter of empty
-  // string. That is, it always returns a zero-length absl::string_view
-  // referring to the item at position 1, not position 0.
-  ByAnyChar empty("");
-  EXPECT_FALSE(IsFoundAt("", empty, 0));
-  EXPECT_FALSE(IsFoundAt("a", empty, 0));
-  EXPECT_TRUE(IsFoundAt("ab", empty, 1));
-  EXPECT_TRUE(IsFoundAt("abc", empty, 1));
-}
-
-//
-// Tests for ByLength
-//
-
-TEST(Delimiter, ByLength) {
-  using absl::ByLength;
-
-  ByLength four_char_delim(4);
-
-  // Found
-  EXPECT_TRUE(IsFoundAt("abcde", four_char_delim, 4));
-  EXPECT_TRUE(IsFoundAt("abcdefghijklmnopqrstuvwxyz", four_char_delim, 4));
-  EXPECT_TRUE(IsFoundAt("a b,c\nd", four_char_delim, 4));
-  // Not found
-  EXPECT_FALSE(IsFoundAt("", four_char_delim, 0));
-  EXPECT_FALSE(IsFoundAt("a", four_char_delim, 0));
-  EXPECT_FALSE(IsFoundAt("ab", four_char_delim, 0));
-  EXPECT_FALSE(IsFoundAt("abc", four_char_delim, 0));
-  EXPECT_FALSE(IsFoundAt("abcd", four_char_delim, 0));
-}
-
-TEST(Split, WorksWithLargeStrings) {
-  if (sizeof(size_t) > 4) {
-    std::string s((uint32_t{1} << 31) + 1, 'x');  // 2G + 1 byte
-    s.back() = '-';
-    std::vector<absl::string_view> v = absl::StrSplit(s, '-');
-    EXPECT_EQ(2, v.size());
-    // The first element will contain 2G of 'x's.
-    // testing::StartsWith is too slow with a 2G string.
-    EXPECT_EQ('x', v[0][0]);
-    EXPECT_EQ('x', v[0][1]);
-    EXPECT_EQ('x', v[0][3]);
-    EXPECT_EQ("", v[1]);
-  }
-}
-
-TEST(SplitInternalTest, TypeTraits) {
-  EXPECT_FALSE(absl::strings_internal::HasMappedType<int>::value);
-  EXPECT_TRUE(
-      (absl::strings_internal::HasMappedType<std::map<int, int>>::value));
-  EXPECT_FALSE(absl::strings_internal::HasValueType<int>::value);
-  EXPECT_TRUE(
-      (absl::strings_internal::HasValueType<std::map<int, int>>::value));
-  EXPECT_FALSE(absl::strings_internal::HasConstIterator<int>::value);
-  EXPECT_TRUE(
-      (absl::strings_internal::HasConstIterator<std::map<int, int>>::value));
-  EXPECT_FALSE(absl::strings_internal::IsInitializerList<int>::value);
-  EXPECT_TRUE((absl::strings_internal::IsInitializerList<
-               std::initializer_list<int>>::value));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/string_view.cc b/third_party/abseil/absl/strings/string_view.cc
deleted file mode 100644
index c5f5de9..0000000
--- a/third_party/abseil/absl/strings/string_view.cc
+++ /dev/null
@@ -1,235 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/string_view.h"
-
-#ifndef ABSL_USES_STD_STRING_VIEW
-
-#include <algorithm>
-#include <climits>
-#include <cstring>
-#include <ostream>
-
-#include "absl/strings/internal/memutil.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-void WritePadding(std::ostream& o, size_t pad) {
-  char fill_buf[32];
-  memset(fill_buf, o.fill(), sizeof(fill_buf));
-  while (pad) {
-    size_t n = std::min(pad, sizeof(fill_buf));
-    o.write(fill_buf, n);
-    pad -= n;
-  }
-}
-
-class LookupTable {
- public:
-  // For each character in wanted, sets the index corresponding
-  // to the ASCII code of that character. This is used by
-  // the find_.*_of methods below to tell whether or not a character is in
-  // the lookup table in constant time.
-  explicit LookupTable(string_view wanted) {
-    for (char c : wanted) {
-      table_[Index(c)] = true;
-    }
-  }
-  bool operator[](char c) const { return table_[Index(c)]; }
-
- private:
-  static unsigned char Index(char c) { return static_cast<unsigned char>(c); }
-  bool table_[UCHAR_MAX + 1] = {};
-};
-
-}  // namespace
-
-std::ostream& operator<<(std::ostream& o, string_view piece) {
-  std::ostream::sentry sentry(o);
-  if (sentry) {
-    size_t lpad = 0;
-    size_t rpad = 0;
-    if (static_cast<size_t>(o.width()) > piece.size()) {
-      size_t pad = o.width() - piece.size();
-      if ((o.flags() & o.adjustfield) == o.left) {
-        rpad = pad;
-      } else {
-        lpad = pad;
-      }
-    }
-    if (lpad) WritePadding(o, lpad);
-    o.write(piece.data(), piece.size());
-    if (rpad) WritePadding(o, rpad);
-    o.width(0);
-  }
-  return o;
-}
-
-string_view::size_type string_view::find(string_view s, size_type pos) const
-    noexcept {
-  if (empty() || pos > length_) {
-    if (empty() && pos == 0 && s.empty()) return 0;
-    return npos;
-  }
-  const char* result =
-      strings_internal::memmatch(ptr_ + pos, length_ - pos, s.ptr_, s.length_);
-  return result ? result - ptr_ : npos;
-}
-
-string_view::size_type string_view::find(char c, size_type pos) const noexcept {
-  if (empty() || pos >= length_) {
-    return npos;
-  }
-  const char* result =
-      static_cast<const char*>(memchr(ptr_ + pos, c, length_ - pos));
-  return result != nullptr ? result - ptr_ : npos;
-}
-
-string_view::size_type string_view::rfind(string_view s, size_type pos) const
-    noexcept {
-  if (length_ < s.length_) return npos;
-  if (s.empty()) return std::min(length_, pos);
-  const char* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_;
-  const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_);
-  return result != last ? result - ptr_ : npos;
-}
-
-// Search range is [0..pos] inclusive.  If pos == npos, search everything.
-string_view::size_type string_view::rfind(char c, size_type pos) const
-    noexcept {
-  // Note: memrchr() is not available on Windows.
-  if (empty()) return npos;
-  for (size_type i = std::min(pos, length_ - 1);; --i) {
-    if (ptr_[i] == c) {
-      return i;
-    }
-    if (i == 0) break;
-  }
-  return npos;
-}
-
-string_view::size_type string_view::find_first_of(string_view s,
-                                                  size_type pos) const
-    noexcept {
-  if (empty() || s.empty()) {
-    return npos;
-  }
-  // Avoid the cost of LookupTable() for a single-character search.
-  if (s.length_ == 1) return find_first_of(s.ptr_[0], pos);
-  LookupTable tbl(s);
-  for (size_type i = pos; i < length_; ++i) {
-    if (tbl[ptr_[i]]) {
-      return i;
-    }
-  }
-  return npos;
-}
-
-string_view::size_type string_view::find_first_not_of(string_view s,
-                                                      size_type pos) const
-    noexcept {
-  if (empty()) return npos;
-  // Avoid the cost of LookupTable() for a single-character search.
-  if (s.length_ == 1) return find_first_not_of(s.ptr_[0], pos);
-  LookupTable tbl(s);
-  for (size_type i = pos; i < length_; ++i) {
-    if (!tbl[ptr_[i]]) {
-      return i;
-    }
-  }
-  return npos;
-}
-
-string_view::size_type string_view::find_first_not_of(char c,
-                                                      size_type pos) const
-    noexcept {
-  if (empty()) return npos;
-  for (; pos < length_; ++pos) {
-    if (ptr_[pos] != c) {
-      return pos;
-    }
-  }
-  return npos;
-}
-
-string_view::size_type string_view::find_last_of(string_view s,
-                                                 size_type pos) const noexcept {
-  if (empty() || s.empty()) return npos;
-  // Avoid the cost of LookupTable() for a single-character search.
-  if (s.length_ == 1) return find_last_of(s.ptr_[0], pos);
-  LookupTable tbl(s);
-  for (size_type i = std::min(pos, length_ - 1);; --i) {
-    if (tbl[ptr_[i]]) {
-      return i;
-    }
-    if (i == 0) break;
-  }
-  return npos;
-}
-
-string_view::size_type string_view::find_last_not_of(string_view s,
-                                                     size_type pos) const
-    noexcept {
-  if (empty()) return npos;
-  size_type i = std::min(pos, length_ - 1);
-  if (s.empty()) return i;
-  // Avoid the cost of LookupTable() for a single-character search.
-  if (s.length_ == 1) return find_last_not_of(s.ptr_[0], pos);
-  LookupTable tbl(s);
-  for (;; --i) {
-    if (!tbl[ptr_[i]]) {
-      return i;
-    }
-    if (i == 0) break;
-  }
-  return npos;
-}
-
-string_view::size_type string_view::find_last_not_of(char c,
-                                                     size_type pos) const
-    noexcept {
-  if (empty()) return npos;
-  size_type i = std::min(pos, length_ - 1);
-  for (;; --i) {
-    if (ptr_[i] != c) {
-      return i;
-    }
-    if (i == 0) break;
-  }
-  return npos;
-}
-
-// MSVC has non-standard behavior that implicitly creates definitions for static
-// const members. These implicit definitions conflict with explicit out-of-class
-// member definitions that are required by the C++ standard, resulting in
-// LNK1169 "multiply defined" errors at link time. __declspec(selectany) asks
-// MSVC to choose only one definition for the symbol it decorates. See details
-// at https://msdn.microsoft.com/en-us/library/34h23df8(v=vs.100).aspx
-#ifdef _MSC_VER
-#define ABSL_STRING_VIEW_SELECTANY __declspec(selectany)
-#else
-#define ABSL_STRING_VIEW_SELECTANY
-#endif
-
-ABSL_STRING_VIEW_SELECTANY
-constexpr string_view::size_type string_view::npos;
-ABSL_STRING_VIEW_SELECTANY
-constexpr string_view::size_type string_view::kMaxSize;
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_STRING_VIEW
diff --git a/third_party/abseil/absl/strings/string_view.h b/third_party/abseil/absl/strings/string_view.h
deleted file mode 100644
index 5260b5b..0000000
--- a/third_party/abseil/absl/strings/string_view.h
+++ /dev/null
@@ -1,629 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: string_view.h
-// -----------------------------------------------------------------------------
-//
-// This file contains the definition of the `absl::string_view` class. A
-// `string_view` points to a contiguous span of characters, often part or all of
-// another `std::string`, double-quoted string literal, character array, or even
-// another `string_view`.
-//
-// This `absl::string_view` abstraction is designed to be a drop-in
-// replacement for the C++17 `std::string_view` abstraction.
-#ifndef ABSL_STRINGS_STRING_VIEW_H_
-#define ABSL_STRINGS_STRING_VIEW_H_
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <cstring>
-#include <iosfwd>
-#include <iterator>
-#include <limits>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"
-
-#ifdef ABSL_USES_STD_STRING_VIEW
-
-#include <string_view>  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using string_view = std::string_view;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_STRING_VIEW
-
-#if ABSL_HAVE_BUILTIN(__builtin_memcmp) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_INTERNAL_STRING_VIEW_MEMCMP __builtin_memcmp
-#else  // ABSL_HAVE_BUILTIN(__builtin_memcmp)
-#define ABSL_INTERNAL_STRING_VIEW_MEMCMP memcmp
-#endif  // ABSL_HAVE_BUILTIN(__builtin_memcmp)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// absl::string_view
-//
-// A `string_view` provides a lightweight view into the string data provided by
-// a `std::string`, double-quoted string literal, character array, or even
-// another `string_view`. A `string_view` does *not* own the string to which it
-// points, and that data cannot be modified through the view.
-//
-// You can use `string_view` as a function or method parameter anywhere a
-// parameter can receive a double-quoted string literal, `const char*`,
-// `std::string`, or another `absl::string_view` argument with no need to copy
-// the string data. Systematic use of `string_view` within function arguments
-// reduces data copies and `strlen()` calls.
-//
-// Because of its small size, prefer passing `string_view` by value:
-//
-//   void MyFunction(absl::string_view arg);
-//
-// If circumstances require, you may also pass one by const reference:
-//
-//   void MyFunction(const absl::string_view& arg);  // not preferred
-//
-// Passing by value generates slightly smaller code for many architectures.
-//
-// In either case, the source data of the `string_view` must outlive the
-// `string_view` itself.
-//
-// A `string_view` is also suitable for local variables if you know that the
-// lifetime of the underlying object is longer than the lifetime of your
-// `string_view` variable. However, beware of binding a `string_view` to a
-// temporary value:
-//
-//   // BAD use of string_view: lifetime problem
-//   absl::string_view sv = obj.ReturnAString();
-//
-//   // GOOD use of string_view: str outlives sv
-//   std::string str = obj.ReturnAString();
-//   absl::string_view sv = str;
-//
-// Due to lifetime issues, a `string_view` is sometimes a poor choice for a
-// return value and usually a poor choice for a data member. If you do use a
-// `string_view` this way, it is your responsibility to ensure that the object
-// pointed to by the `string_view` outlives the `string_view`.
-//
-// A `string_view` may represent a whole string or just part of a string. For
-// example, when splitting a string, `std::vector<absl::string_view>` is a
-// natural data type for the output.
-//
-// For another example, a Cord is a non-contiguous, potentially very
-// long string-like object.  The Cord class has an interface that iteratively
-// provides string_view objects that point to the successive pieces of a Cord
-// object.
-//
-// When constructed from a source which is NUL-terminated, the `string_view`
-// itself will not include the NUL-terminator unless a specific size (including
-// the NUL) is passed to the constructor. As a result, common idioms that work
-// on NUL-terminated strings do not work on `string_view` objects. If you write
-// code that scans a `string_view`, you must check its length rather than test
-// for nul, for example. Note, however, that nuls may still be embedded within
-// a `string_view` explicitly.
-//
-// You may create a null `string_view` in two ways:
-//
-//   absl::string_view sv;
-//   absl::string_view sv(nullptr, 0);
-//
-// For the above, `sv.data() == nullptr`, `sv.length() == 0`, and
-// `sv.empty() == true`. Also, if you create a `string_view` with a non-null
-// pointer then `sv.data() != nullptr`. Thus, you can use `string_view()` to
-// signal an undefined value that is different from other `string_view` values
-// in a similar fashion to how `const char* p1 = nullptr;` is different from
-// `const char* p2 = "";`. However, in practice, it is not recommended to rely
-// on this behavior.
-//
-// Be careful not to confuse a null `string_view` with an empty one. A null
-// `string_view` is an empty `string_view`, but some empty `string_view`s are
-// not null. Prefer checking for emptiness over checking for null.
-//
-// There are many ways to create an empty string_view:
-//
-//   const char* nullcp = nullptr;
-//   // string_view.size() will return 0 in all cases.
-//   absl::string_view();
-//   absl::string_view(nullcp, 0);
-//   absl::string_view("");
-//   absl::string_view("", 0);
-//   absl::string_view("abcdef", 0);
-//   absl::string_view("abcdef" + 6, 0);
-//
-// All empty `string_view` objects whether null or not, are equal:
-//
-//   absl::string_view() == absl::string_view("", 0)
-//   absl::string_view(nullptr, 0) == absl::string_view("abcdef"+6, 0)
-class string_view {
- public:
-  using traits_type = std::char_traits<char>;
-  using value_type = char;
-  using pointer = char*;
-  using const_pointer = const char*;
-  using reference = char&;
-  using const_reference = const char&;
-  using const_iterator = const char*;
-  using iterator = const_iterator;
-  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
-  using reverse_iterator = const_reverse_iterator;
-  using size_type = size_t;
-  using difference_type = std::ptrdiff_t;
-
-  static constexpr size_type npos = static_cast<size_type>(-1);
-
-  // Null `string_view` constructor
-  constexpr string_view() noexcept : ptr_(nullptr), length_(0) {}
-
-  // Implicit constructors
-
-  template <typename Allocator>
-  string_view(  // NOLINT(runtime/explicit)
-      const std::basic_string<char, std::char_traits<char>, Allocator>&
-          str) noexcept
-      // This is implemented in terms of `string_view(p, n)` so `str.size()`
-      // doesn't need to be reevaluated after `ptr_` is set.
-      : string_view(str.data(), str.size()) {}
-
-  // Implicit constructor of a `string_view` from NUL-terminated `str`. When
-  // accepting possibly null strings, use `absl::NullSafeStringView(str)`
-  // instead (see below).
-  constexpr string_view(const char* str)  // NOLINT(runtime/explicit)
-      : ptr_(str),
-        length_(str ? CheckLengthInternal(StrlenInternal(str)) : 0) {}
-
-  // Implicit constructor of a `string_view` from a `const char*` and length.
-  constexpr string_view(const char* data, size_type len)
-      : ptr_(data), length_(CheckLengthInternal(len)) {}
-
-  // NOTE: Harmlessly omitted to work around gdb bug.
-  //   constexpr string_view(const string_view&) noexcept = default;
-  //   string_view& operator=(const string_view&) noexcept = default;
-
-  // Iterators
-
-  // string_view::begin()
-  //
-  // Returns an iterator pointing to the first character at the beginning of the
-  // `string_view`, or `end()` if the `string_view` is empty.
-  constexpr const_iterator begin() const noexcept { return ptr_; }
-
-  // string_view::end()
-  //
-  // Returns an iterator pointing just beyond the last character at the end of
-  // the `string_view`. This iterator acts as a placeholder; attempting to
-  // access it results in undefined behavior.
-  constexpr const_iterator end() const noexcept { return ptr_ + length_; }
-
-  // string_view::cbegin()
-  //
-  // Returns a const iterator pointing to the first character at the beginning
-  // of the `string_view`, or `end()` if the `string_view` is empty.
-  constexpr const_iterator cbegin() const noexcept { return begin(); }
-
-  // string_view::cend()
-  //
-  // Returns a const iterator pointing just beyond the last character at the end
-  // of the `string_view`. This pointer acts as a placeholder; attempting to
-  // access its element results in undefined behavior.
-  constexpr const_iterator cend() const noexcept { return end(); }
-
-  // string_view::rbegin()
-  //
-  // Returns a reverse iterator pointing to the last character at the end of the
-  // `string_view`, or `rend()` if the `string_view` is empty.
-  const_reverse_iterator rbegin() const noexcept {
-    return const_reverse_iterator(end());
-  }
-
-  // string_view::rend()
-  //
-  // Returns a reverse iterator pointing just before the first character at the
-  // beginning of the `string_view`. This pointer acts as a placeholder;
-  // attempting to access its element results in undefined behavior.
-  const_reverse_iterator rend() const noexcept {
-    return const_reverse_iterator(begin());
-  }
-
-  // string_view::crbegin()
-  //
-  // Returns a const reverse iterator pointing to the last character at the end
-  // of the `string_view`, or `crend()` if the `string_view` is empty.
-  const_reverse_iterator crbegin() const noexcept { return rbegin(); }
-
-  // string_view::crend()
-  //
-  // Returns a const reverse iterator pointing just before the first character
-  // at the beginning of the `string_view`. This pointer acts as a placeholder;
-  // attempting to access its element results in undefined behavior.
-  const_reverse_iterator crend() const noexcept { return rend(); }
-
-  // Capacity Utilities
-
-  // string_view::size()
-  //
-  // Returns the number of characters in the `string_view`.
-  constexpr size_type size() const noexcept {
-    return length_;
-  }
-
-  // string_view::length()
-  //
-  // Returns the number of characters in the `string_view`. Alias for `size()`.
-  constexpr size_type length() const noexcept { return size(); }
-
-  // string_view::max_size()
-  //
-  // Returns the maximum number of characters the `string_view` can hold.
-  constexpr size_type max_size() const noexcept { return kMaxSize; }
-
-  // string_view::empty()
-  //
-  // Checks if the `string_view` is empty (refers to no characters).
-  constexpr bool empty() const noexcept { return length_ == 0; }
-
-  // string_view::operator[]
-  //
-  // Returns the ith element of the `string_view` using the array operator.
-  // Note that this operator does not perform any bounds checking.
-  constexpr const_reference operator[](size_type i) const {
-    return ABSL_HARDENING_ASSERT(i < size()), ptr_[i];
-  }
-
-  // string_view::at()
-  //
-  // Returns the ith element of the `string_view`. Bounds checking is performed,
-  // and an exception of type `std::out_of_range` will be thrown on invalid
-  // access.
-  constexpr const_reference at(size_type i) const {
-    return ABSL_PREDICT_TRUE(i < size())
-               ? ptr_[i]
-               : ((void)base_internal::ThrowStdOutOfRange(
-                      "absl::string_view::at"),
-                  ptr_[i]);
-  }
-
-  // string_view::front()
-  //
-  // Returns the first element of a `string_view`.
-  constexpr const_reference front() const {
-    return ABSL_HARDENING_ASSERT(!empty()), ptr_[0];
-  }
-
-  // string_view::back()
-  //
-  // Returns the last element of a `string_view`.
-  constexpr const_reference back() const {
-    return ABSL_HARDENING_ASSERT(!empty()), ptr_[size() - 1];
-  }
-
-  // string_view::data()
-  //
-  // Returns a pointer to the underlying character array (which is of course
-  // stored elsewhere). Note that `string_view::data()` may contain embedded nul
-  // characters, but the returned buffer may or may not be NUL-terminated;
-  // therefore, do not pass `data()` to a routine that expects a NUL-terminated
-  // string.
-  constexpr const_pointer data() const noexcept { return ptr_; }
-
-  // Modifiers
-
-  // string_view::remove_prefix()
-  //
-  // Removes the first `n` characters from the `string_view`. Note that the
-  // underlying string is not changed, only the view.
-  void remove_prefix(size_type n) {
-    ABSL_HARDENING_ASSERT(n <= length_);
-    ptr_ += n;
-    length_ -= n;
-  }
-
-  // string_view::remove_suffix()
-  //
-  // Removes the last `n` characters from the `string_view`. Note that the
-  // underlying string is not changed, only the view.
-  void remove_suffix(size_type n) {
-    ABSL_HARDENING_ASSERT(n <= length_);
-    length_ -= n;
-  }
-
-  // string_view::swap()
-  //
-  // Swaps this `string_view` with another `string_view`.
-  void swap(string_view& s) noexcept {
-    auto t = *this;
-    *this = s;
-    s = t;
-  }
-
-  // Explicit conversion operators
-
-  // Converts to `std::basic_string`.
-  template <typename A>
-  explicit operator std::basic_string<char, traits_type, A>() const {
-    if (!data()) return {};
-    return std::basic_string<char, traits_type, A>(data(), size());
-  }
-
-  // string_view::copy()
-  //
-  // Copies the contents of the `string_view` at offset `pos` and length `n`
-  // into `buf`.
-  size_type copy(char* buf, size_type n, size_type pos = 0) const {
-    if (ABSL_PREDICT_FALSE(pos > length_)) {
-      base_internal::ThrowStdOutOfRange("absl::string_view::copy");
-    }
-    size_type rlen = (std::min)(length_ - pos, n);
-    if (rlen > 0) {
-      const char* start = ptr_ + pos;
-      traits_type::copy(buf, start, rlen);
-    }
-    return rlen;
-  }
-
-  // string_view::substr()
-  //
-  // Returns a "substring" of the `string_view` (at offset `pos` and length
-  // `n`) as another string_view. This function throws `std::out_of_bounds` if
-  // `pos > size`.
-  // Use absl::ClippedSubstr if you need a truncating substr operation.
-  constexpr string_view substr(size_type pos, size_type n = npos) const {
-    return ABSL_PREDICT_FALSE(pos > length_)
-               ? (base_internal::ThrowStdOutOfRange(
-                      "absl::string_view::substr"),
-                  string_view())
-               : string_view(ptr_ + pos, Min(n, length_ - pos));
-  }
-
-  // string_view::compare()
-  //
-  // Performs a lexicographical comparison between the `string_view` and
-  // another `absl::string_view`, returning -1 if `this` is less than, 0 if
-  // `this` is equal to, and 1 if `this` is greater than the passed string
-  // view. Note that in the case of data equality, a further comparison is made
-  // on the respective sizes of the two `string_view`s to determine which is
-  // smaller, equal, or greater.
-  constexpr int compare(string_view x) const noexcept {
-    return CompareImpl(length_, x.length_,
-                       Min(length_, x.length_) == 0
-                           ? 0
-                           : ABSL_INTERNAL_STRING_VIEW_MEMCMP(
-                                 ptr_, x.ptr_, Min(length_, x.length_)));
-  }
-
-  // Overload of `string_view::compare()` for comparing a substring of the
-  // 'string_view` and another `absl::string_view`.
-  int compare(size_type pos1, size_type count1, string_view v) const {
-    return substr(pos1, count1).compare(v);
-  }
-
-  // Overload of `string_view::compare()` for comparing a substring of the
-  // `string_view` and a substring of another `absl::string_view`.
-  int compare(size_type pos1, size_type count1, string_view v, size_type pos2,
-              size_type count2) const {
-    return substr(pos1, count1).compare(v.substr(pos2, count2));
-  }
-
-  // Overload of `string_view::compare()` for comparing a `string_view` and a
-  // a different  C-style string `s`.
-  int compare(const char* s) const { return compare(string_view(s)); }
-
-  // Overload of `string_view::compare()` for comparing a substring of the
-  // `string_view` and a different string C-style string `s`.
-  int compare(size_type pos1, size_type count1, const char* s) const {
-    return substr(pos1, count1).compare(string_view(s));
-  }
-
-  // Overload of `string_view::compare()` for comparing a substring of the
-  // `string_view` and a substring of a different C-style string `s`.
-  int compare(size_type pos1, size_type count1, const char* s,
-              size_type count2) const {
-    return substr(pos1, count1).compare(string_view(s, count2));
-  }
-
-  // Find Utilities
-
-  // string_view::find()
-  //
-  // Finds the first occurrence of the substring `s` within the `string_view`,
-  // returning the position of the first character's match, or `npos` if no
-  // match was found.
-  size_type find(string_view s, size_type pos = 0) const noexcept;
-
-  // Overload of `string_view::find()` for finding the given character `c`
-  // within the `string_view`.
-  size_type find(char c, size_type pos = 0) const noexcept;
-
-  // string_view::rfind()
-  //
-  // Finds the last occurrence of a substring `s` within the `string_view`,
-  // returning the position of the first character's match, or `npos` if no
-  // match was found.
-  size_type rfind(string_view s, size_type pos = npos) const
-      noexcept;
-
-  // Overload of `string_view::rfind()` for finding the last given character `c`
-  // within the `string_view`.
-  size_type rfind(char c, size_type pos = npos) const noexcept;
-
-  // string_view::find_first_of()
-  //
-  // Finds the first occurrence of any of the characters in `s` within the
-  // `string_view`, returning the start position of the match, or `npos` if no
-  // match was found.
-  size_type find_first_of(string_view s, size_type pos = 0) const
-      noexcept;
-
-  // Overload of `string_view::find_first_of()` for finding a character `c`
-  // within the `string_view`.
-  size_type find_first_of(char c, size_type pos = 0) const
-      noexcept {
-    return find(c, pos);
-  }
-
-  // string_view::find_last_of()
-  //
-  // Finds the last occurrence of any of the characters in `s` within the
-  // `string_view`, returning the start position of the match, or `npos` if no
-  // match was found.
-  size_type find_last_of(string_view s, size_type pos = npos) const
-      noexcept;
-
-  // Overload of `string_view::find_last_of()` for finding a character `c`
-  // within the `string_view`.
-  size_type find_last_of(char c, size_type pos = npos) const
-      noexcept {
-    return rfind(c, pos);
-  }
-
-  // string_view::find_first_not_of()
-  //
-  // Finds the first occurrence of any of the characters not in `s` within the
-  // `string_view`, returning the start position of the first non-match, or
-  // `npos` if no non-match was found.
-  size_type find_first_not_of(string_view s, size_type pos = 0) const noexcept;
-
-  // Overload of `string_view::find_first_not_of()` for finding a character
-  // that is not `c` within the `string_view`.
-  size_type find_first_not_of(char c, size_type pos = 0) const noexcept;
-
-  // string_view::find_last_not_of()
-  //
-  // Finds the last occurrence of any of the characters not in `s` within the
-  // `string_view`, returning the start position of the last non-match, or
-  // `npos` if no non-match was found.
-  size_type find_last_not_of(string_view s,
-                                          size_type pos = npos) const noexcept;
-
-  // Overload of `string_view::find_last_not_of()` for finding a character
-  // that is not `c` within the `string_view`.
-  size_type find_last_not_of(char c, size_type pos = npos) const
-      noexcept;
-
- private:
-  static constexpr size_type kMaxSize =
-      (std::numeric_limits<difference_type>::max)();
-
-  static constexpr size_type CheckLengthInternal(size_type len) {
-    return ABSL_HARDENING_ASSERT(len <= kMaxSize), len;
-  }
-
-  static constexpr size_type StrlenInternal(const char* str) {
-#if defined(_MSC_VER) && _MSC_VER >= 1910 && !defined(__clang__)
-    // MSVC 2017+ can evaluate this at compile-time.
-    const char* begin = str;
-    while (*str != '\0') ++str;
-    return str - begin;
-#elif ABSL_HAVE_BUILTIN(__builtin_strlen) || \
-    (defined(__GNUC__) && !defined(__clang__))
-    // GCC has __builtin_strlen according to
-    // https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Other-Builtins.html, but
-    // ABSL_HAVE_BUILTIN doesn't detect that, so we use the extra checks above.
-    // __builtin_strlen is constexpr.
-    return __builtin_strlen(str);
-#else
-    return str ? strlen(str) : 0;
-#endif
-  }
-
-  static constexpr size_t Min(size_type length_a, size_type length_b) {
-    return length_a < length_b ? length_a : length_b;
-  }
-
-  static constexpr int CompareImpl(size_type length_a, size_type length_b,
-                                   int compare_result) {
-    return compare_result == 0 ? static_cast<int>(length_a > length_b) -
-                                     static_cast<int>(length_a < length_b)
-                               : (compare_result < 0 ? -1 : 1);
-  }
-
-  const char* ptr_;
-  size_type length_;
-};
-
-// This large function is defined inline so that in a fairly common case where
-// one of the arguments is a literal, the compiler can elide a lot of the
-// following comparisons.
-constexpr bool operator==(string_view x, string_view y) noexcept {
-  return x.size() == y.size() &&
-         (x.empty() ||
-          ABSL_INTERNAL_STRING_VIEW_MEMCMP(x.data(), y.data(), x.size()) == 0);
-}
-
-constexpr bool operator!=(string_view x, string_view y) noexcept {
-  return !(x == y);
-}
-
-constexpr bool operator<(string_view x, string_view y) noexcept {
-  return x.compare(y) < 0;
-}
-
-constexpr bool operator>(string_view x, string_view y) noexcept {
-  return y < x;
-}
-
-constexpr bool operator<=(string_view x, string_view y) noexcept {
-  return !(y < x);
-}
-
-constexpr bool operator>=(string_view x, string_view y) noexcept {
-  return !(x < y);
-}
-
-// IO Insertion Operator
-std::ostream& operator<<(std::ostream& o, string_view piece);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef ABSL_INTERNAL_STRING_VIEW_MEMCMP
-
-#endif  // ABSL_USES_STD_STRING_VIEW
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// ClippedSubstr()
-//
-// Like `s.substr(pos, n)`, but clips `pos` to an upper bound of `s.size()`.
-// Provided because std::string_view::substr throws if `pos > size()`
-inline string_view ClippedSubstr(string_view s, size_t pos,
-                                 size_t n = string_view::npos) {
-  pos = (std::min)(pos, static_cast<size_t>(s.size()));
-  return s.substr(pos, n);
-}
-
-// NullSafeStringView()
-//
-// Creates an `absl::string_view` from a pointer `p` even if it's null-valued.
-// This function should be used where an `absl::string_view` can be created from
-// a possibly-null pointer.
-constexpr string_view NullSafeStringView(const char* p) {
-  return p ? string_view(p) : string_view();
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STRING_VIEW_H_
diff --git a/third_party/abseil/absl/strings/string_view_benchmark.cc b/third_party/abseil/absl/strings/string_view_benchmark.cc
deleted file mode 100644
index 0d74e23..0000000
--- a/third_party/abseil/absl/strings/string_view_benchmark.cc
+++ /dev/null
@@ -1,381 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/string_view.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <map>
-#include <random>
-#include <string>
-#include <unordered_set>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/attributes.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-void BM_StringViewFromString(benchmark::State& state) {
-  std::string s(state.range(0), 'x');
-  std::string* ps = &s;
-  struct SV {
-    SV() = default;
-    explicit SV(const std::string& s) : sv(s) {}
-    absl::string_view sv;
-  } sv;
-  SV* psv = &sv;
-  benchmark::DoNotOptimize(ps);
-  benchmark::DoNotOptimize(psv);
-  for (auto _ : state) {
-    new (psv) SV(*ps);
-    benchmark::DoNotOptimize(sv);
-  }
-}
-BENCHMARK(BM_StringViewFromString)->Arg(12)->Arg(128);
-
-// Provide a forcibly out-of-line wrapper for operator== that can be used in
-// benchmarks to measure the impact of inlining.
-ABSL_ATTRIBUTE_NOINLINE
-bool NonInlinedEq(absl::string_view a, absl::string_view b) { return a == b; }
-
-// We use functions that cannot be inlined to perform the comparison loops so
-// that inlining of the operator== can't optimize away *everything*.
-ABSL_ATTRIBUTE_NOINLINE
-void DoEqualityComparisons(benchmark::State& state, absl::string_view a,
-                           absl::string_view b) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(a == b);
-  }
-}
-
-void BM_EqualIdentical(benchmark::State& state) {
-  std::string x(state.range(0), 'a');
-  DoEqualityComparisons(state, x, x);
-}
-BENCHMARK(BM_EqualIdentical)->DenseRange(0, 3)->Range(4, 1 << 10);
-
-void BM_EqualSame(benchmark::State& state) {
-  std::string x(state.range(0), 'a');
-  std::string y = x;
-  DoEqualityComparisons(state, x, y);
-}
-BENCHMARK(BM_EqualSame)
-    ->DenseRange(0, 10)
-    ->Arg(20)
-    ->Arg(40)
-    ->Arg(70)
-    ->Arg(110)
-    ->Range(160, 4096);
-
-void BM_EqualDifferent(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string x(len, 'a');
-  std::string y = x;
-  if (len > 0) {
-    y[len - 1] = 'b';
-  }
-  DoEqualityComparisons(state, x, y);
-}
-BENCHMARK(BM_EqualDifferent)->DenseRange(0, 3)->Range(4, 1 << 10);
-
-// This benchmark is intended to check that important simplifications can be
-// made with absl::string_view comparisons against constant strings. The idea is
-// that if constant strings cause redundant components of the comparison, the
-// compiler should detect and eliminate them. Here we use 8 different strings,
-// each with the same size. Provided our comparison makes the implementation
-// inline-able by the compiler, it should fold all of these away into a single
-// size check once per loop iteration.
-ABSL_ATTRIBUTE_NOINLINE
-void DoConstantSizeInlinedEqualityComparisons(benchmark::State& state,
-                                              absl::string_view a) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(a == "aaa");
-    benchmark::DoNotOptimize(a == "bbb");
-    benchmark::DoNotOptimize(a == "ccc");
-    benchmark::DoNotOptimize(a == "ddd");
-    benchmark::DoNotOptimize(a == "eee");
-    benchmark::DoNotOptimize(a == "fff");
-    benchmark::DoNotOptimize(a == "ggg");
-    benchmark::DoNotOptimize(a == "hhh");
-  }
-}
-void BM_EqualConstantSizeInlined(benchmark::State& state) {
-  std::string x(state.range(0), 'a');
-  DoConstantSizeInlinedEqualityComparisons(state, x);
-}
-// We only need to check for size of 3, and <> 3 as this benchmark only has to
-// do with size differences.
-BENCHMARK(BM_EqualConstantSizeInlined)->DenseRange(2, 4);
-
-// This benchmark exists purely to give context to the above timings: this is
-// what they would look like if the compiler is completely unable to simplify
-// between two comparisons when they are comparing against constant strings.
-ABSL_ATTRIBUTE_NOINLINE
-void DoConstantSizeNonInlinedEqualityComparisons(benchmark::State& state,
-                                                 absl::string_view a) {
-  for (auto _ : state) {
-    // Force these out-of-line to compare with the above function.
-    benchmark::DoNotOptimize(NonInlinedEq(a, "aaa"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "bbb"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "ccc"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "ddd"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "eee"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "fff"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "ggg"));
-    benchmark::DoNotOptimize(NonInlinedEq(a, "hhh"));
-  }
-}
-
-void BM_EqualConstantSizeNonInlined(benchmark::State& state) {
-  std::string x(state.range(0), 'a');
-  DoConstantSizeNonInlinedEqualityComparisons(state, x);
-}
-// We only need to check for size of 3, and <> 3 as this benchmark only has to
-// do with size differences.
-BENCHMARK(BM_EqualConstantSizeNonInlined)->DenseRange(2, 4);
-
-void BM_CompareSame(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string x;
-  for (int i = 0; i < len; i++) {
-    x += 'a';
-  }
-  std::string y = x;
-  absl::string_view a = x;
-  absl::string_view b = y;
-
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(a);
-    benchmark::DoNotOptimize(b);
-    benchmark::DoNotOptimize(a.compare(b));
-  }
-}
-BENCHMARK(BM_CompareSame)->DenseRange(0, 3)->Range(4, 1 << 10);
-
-void BM_CompareFirstOneLess(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string x(len, 'a');
-  std::string y = x;
-  y.back() = 'b';
-  absl::string_view a = x;
-  absl::string_view b = y;
-
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(a);
-    benchmark::DoNotOptimize(b);
-    benchmark::DoNotOptimize(a.compare(b));
-  }
-}
-BENCHMARK(BM_CompareFirstOneLess)->DenseRange(1, 3)->Range(4, 1 << 10);
-
-void BM_CompareSecondOneLess(benchmark::State& state) {
-  const int len = state.range(0);
-  std::string x(len, 'a');
-  std::string y = x;
-  x.back() = 'b';
-  absl::string_view a = x;
-  absl::string_view b = y;
-
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(a);
-    benchmark::DoNotOptimize(b);
-    benchmark::DoNotOptimize(a.compare(b));
-  }
-}
-BENCHMARK(BM_CompareSecondOneLess)->DenseRange(1, 3)->Range(4, 1 << 10);
-
-void BM_find_string_view_len_one(benchmark::State& state) {
-  std::string haystack(state.range(0), '0');
-  absl::string_view s(haystack);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s.find("x"));  // not present; length 1
-  }
-}
-BENCHMARK(BM_find_string_view_len_one)->Range(1, 1 << 20);
-
-void BM_find_string_view_len_two(benchmark::State& state) {
-  std::string haystack(state.range(0), '0');
-  absl::string_view s(haystack);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s.find("xx"));  // not present; length 2
-  }
-}
-BENCHMARK(BM_find_string_view_len_two)->Range(1, 1 << 20);
-
-void BM_find_one_char(benchmark::State& state) {
-  std::string haystack(state.range(0), '0');
-  absl::string_view s(haystack);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s.find('x'));  // not present
-  }
-}
-BENCHMARK(BM_find_one_char)->Range(1, 1 << 20);
-
-void BM_rfind_one_char(benchmark::State& state) {
-  std::string haystack(state.range(0), '0');
-  absl::string_view s(haystack);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s.rfind('x'));  // not present
-  }
-}
-BENCHMARK(BM_rfind_one_char)->Range(1, 1 << 20);
-
-void BM_worst_case_find_first_of(benchmark::State& state, int haystack_len) {
-  const int needle_len = state.range(0);
-  std::string needle;
-  for (int i = 0; i < needle_len; ++i) {
-    needle += 'a' + i;
-  }
-  std::string haystack(haystack_len, '0');  // 1000 zeros.
-
-  absl::string_view s(haystack);
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s.find_first_of(needle));
-  }
-}
-
-void BM_find_first_of_short(benchmark::State& state) {
-  BM_worst_case_find_first_of(state, 10);
-}
-
-void BM_find_first_of_medium(benchmark::State& state) {
-  BM_worst_case_find_first_of(state, 100);
-}
-
-void BM_find_first_of_long(benchmark::State& state) {
-  BM_worst_case_find_first_of(state, 1000);
-}
-
-BENCHMARK(BM_find_first_of_short)->DenseRange(0, 4)->Arg(8)->Arg(16)->Arg(32);
-BENCHMARK(BM_find_first_of_medium)->DenseRange(0, 4)->Arg(8)->Arg(16)->Arg(32);
-BENCHMARK(BM_find_first_of_long)->DenseRange(0, 4)->Arg(8)->Arg(16)->Arg(32);
-
-struct EasyMap : public std::map<absl::string_view, uint64_t> {
-  explicit EasyMap(size_t) {}
-};
-
-// This templated benchmark helper function is intended to stress operator== or
-// operator< in a realistic test.  It surely isn't entirely realistic, but it's
-// a start.  The test creates a map of type Map, a template arg, and populates
-// it with table_size key/value pairs. Each key has WordsPerKey words.  After
-// creating the map, a number of lookups are done in random order.  Some keys
-// are used much more frequently than others in this phase of the test.
-template <typename Map, int WordsPerKey>
-void StringViewMapBenchmark(benchmark::State& state) {
-  const int table_size = state.range(0);
-  const double kFractionOfKeysThatAreHot = 0.2;
-  const int kNumLookupsOfHotKeys = 20;
-  const int kNumLookupsOfColdKeys = 1;
-  const char* words[] = {"the",   "quick",  "brown",    "fox",      "jumped",
-                         "over",  "the",    "lazy",     "dog",      "and",
-                         "found", "a",      "large",    "mushroom", "and",
-                         "a",     "couple", "crickets", "eating",   "pie"};
-  // Create some keys that consist of words in random order.
-  std::random_device r;
-  std::seed_seq seed({r(), r(), r(), r(), r(), r(), r(), r()});
-  std::mt19937 rng(seed);
-  std::vector<std::string> keys(table_size);
-  std::vector<int> all_indices;
-  const int kBlockSize = 1 << 12;
-  std::unordered_set<std::string> t(kBlockSize);
-  std::uniform_int_distribution<int> uniform(0, ABSL_ARRAYSIZE(words) - 1);
-  for (int i = 0; i < table_size; i++) {
-    all_indices.push_back(i);
-    do {
-      keys[i].clear();
-      for (int j = 0; j < WordsPerKey; j++) {
-        absl::StrAppend(&keys[i], j > 0 ? " " : "", words[uniform(rng)]);
-      }
-    } while (!t.insert(keys[i]).second);
-  }
-
-  // Create a list of strings to lookup: a permutation of the array of
-  // keys we just created, with repeats.  "Hot" keys get repeated more.
-  std::shuffle(all_indices.begin(), all_indices.end(), rng);
-  const int num_hot = table_size * kFractionOfKeysThatAreHot;
-  const int num_cold = table_size - num_hot;
-  std::vector<int> hot_indices(all_indices.begin(),
-                               all_indices.begin() + num_hot);
-  std::vector<int> indices;
-  for (int i = 0; i < kNumLookupsOfColdKeys; i++) {
-    indices.insert(indices.end(), all_indices.begin(), all_indices.end());
-  }
-  for (int i = 0; i < kNumLookupsOfHotKeys - kNumLookupsOfColdKeys; i++) {
-    indices.insert(indices.end(), hot_indices.begin(), hot_indices.end());
-  }
-  std::shuffle(indices.begin(), indices.end(), rng);
-  ABSL_RAW_CHECK(
-      num_cold * kNumLookupsOfColdKeys + num_hot * kNumLookupsOfHotKeys ==
-          indices.size(),
-      "");
-  // After constructing the array we probe it with absl::string_views built from
-  // test_strings.  This means operator== won't see equal pointers, so
-  // it'll have to check for equal lengths and equal characters.
-  std::vector<std::string> test_strings(indices.size());
-  for (int i = 0; i < indices.size(); i++) {
-    test_strings[i] = keys[indices[i]];
-  }
-
-  // Run the benchmark. It includes map construction but is mostly
-  // map lookups.
-  for (auto _ : state) {
-    Map h(table_size);
-    for (int i = 0; i < table_size; i++) {
-      h[keys[i]] = i * 2;
-    }
-    ABSL_RAW_CHECK(h.size() == table_size, "");
-    uint64_t sum = 0;
-    for (int i = 0; i < indices.size(); i++) {
-      sum += h[test_strings[i]];
-    }
-    benchmark::DoNotOptimize(sum);
-  }
-}
-
-void BM_StdMap_4(benchmark::State& state) {
-  StringViewMapBenchmark<EasyMap, 4>(state);
-}
-BENCHMARK(BM_StdMap_4)->Range(1 << 10, 1 << 16);
-
-void BM_StdMap_8(benchmark::State& state) {
-  StringViewMapBenchmark<EasyMap, 8>(state);
-}
-BENCHMARK(BM_StdMap_8)->Range(1 << 10, 1 << 16);
-
-void BM_CopyToStringNative(benchmark::State& state) {
-  std::string src(state.range(0), 'x');
-  absl::string_view sv(src);
-  std::string dst;
-  for (auto _ : state) {
-    dst.assign(sv.begin(), sv.end());
-  }
-}
-BENCHMARK(BM_CopyToStringNative)->Range(1 << 3, 1 << 12);
-
-void BM_AppendToStringNative(benchmark::State& state) {
-  std::string src(state.range(0), 'x');
-  absl::string_view sv(src);
-  std::string dst;
-  for (auto _ : state) {
-    dst.clear();
-    dst.insert(dst.end(), sv.begin(), sv.end());
-  }
-}
-BENCHMARK(BM_AppendToStringNative)->Range(1 << 3, 1 << 12);
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/string_view_test.cc b/third_party/abseil/absl/strings/string_view_test.cc
deleted file mode 100644
index 643af8f..0000000
--- a/third_party/abseil/absl/strings/string_view_test.cc
+++ /dev/null
@@ -1,1264 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/string_view.h"
-
-#include <stdlib.h>
-#include <iomanip>
-#include <iterator>
-#include <limits>
-#include <map>
-#include <sstream>
-#include <stdexcept>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/options.h"
-
-#if defined(ABSL_HAVE_STD_STRING_VIEW) || defined(__ANDROID__)
-// We don't control the death messaging when using std::string_view.
-// Android assert messages only go to system log, so death tests cannot inspect
-// the message for matching.
-#define ABSL_EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-  EXPECT_DEATH_IF_SUPPORTED(statement, ".*")
-#else
-#define ABSL_EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-  EXPECT_DEATH_IF_SUPPORTED(statement, regex)
-#endif
-
-namespace {
-
-// A minimal allocator that uses malloc().
-template <typename T>
-struct Mallocator {
-  typedef T value_type;
-  typedef size_t size_type;
-  typedef ptrdiff_t difference_type;
-  typedef T* pointer;
-  typedef const T* const_pointer;
-  typedef T& reference;
-  typedef const T& const_reference;
-
-  size_type max_size() const {
-    return size_t(std::numeric_limits<size_type>::max()) / sizeof(value_type);
-  }
-  template <typename U>
-  struct rebind {
-    typedef Mallocator<U> other;
-  };
-  Mallocator() = default;
-  template <class U>
-  Mallocator(const Mallocator<U>&) {}  // NOLINT(runtime/explicit)
-
-  T* allocate(size_t n) { return static_cast<T*>(std::malloc(n * sizeof(T))); }
-  void deallocate(T* p, size_t) { std::free(p); }
-};
-template <typename T, typename U>
-bool operator==(const Mallocator<T>&, const Mallocator<U>&) {
-  return true;
-}
-template <typename T, typename U>
-bool operator!=(const Mallocator<T>&, const Mallocator<U>&) {
-  return false;
-}
-
-TEST(StringViewTest, Ctor) {
-  {
-    // Null.
-    absl::string_view s10;
-    EXPECT_TRUE(s10.data() == nullptr);
-    EXPECT_EQ(0, s10.length());
-  }
-
-  {
-    // const char* without length.
-    const char* hello = "hello";
-    absl::string_view s20(hello);
-    EXPECT_TRUE(s20.data() == hello);
-    EXPECT_EQ(5, s20.length());
-
-    // const char* with length.
-    absl::string_view s21(hello, 4);
-    EXPECT_TRUE(s21.data() == hello);
-    EXPECT_EQ(4, s21.length());
-
-    // Not recommended, but valid C++
-    absl::string_view s22(hello, 6);
-    EXPECT_TRUE(s22.data() == hello);
-    EXPECT_EQ(6, s22.length());
-  }
-
-  {
-    // std::string.
-    std::string hola = "hola";
-    absl::string_view s30(hola);
-    EXPECT_TRUE(s30.data() == hola.data());
-    EXPECT_EQ(4, s30.length());
-
-    // std::string with embedded '\0'.
-    hola.push_back('\0');
-    hola.append("h2");
-    hola.push_back('\0');
-    absl::string_view s31(hola);
-    EXPECT_TRUE(s31.data() == hola.data());
-    EXPECT_EQ(8, s31.length());
-  }
-
-  {
-    using mstring =
-        std::basic_string<char, std::char_traits<char>, Mallocator<char>>;
-    mstring str1("BUNGIE-JUMPING!");
-    const mstring str2("SLEEPING!");
-
-    absl::string_view s1(str1);
-    s1.remove_prefix(strlen("BUNGIE-JUM"));
-
-    absl::string_view s2(str2);
-    s2.remove_prefix(strlen("SLEE"));
-
-    EXPECT_EQ(s1, s2);
-    EXPECT_EQ(s1, "PING!");
-  }
-
-  // TODO(mec): absl::string_view(const absl::string_view&);
-}
-
-TEST(StringViewTest, Swap) {
-  absl::string_view a("a");
-  absl::string_view b("bbb");
-  EXPECT_TRUE(noexcept(a.swap(b)));
-  a.swap(b);
-  EXPECT_EQ(a, "bbb");
-  EXPECT_EQ(b, "a");
-  a.swap(b);
-  EXPECT_EQ(a, "a");
-  EXPECT_EQ(b, "bbb");
-}
-
-TEST(StringViewTest, STLComparator) {
-  std::string s1("foo");
-  std::string s2("bar");
-  std::string s3("baz");
-
-  absl::string_view p1(s1);
-  absl::string_view p2(s2);
-  absl::string_view p3(s3);
-
-  typedef std::map<absl::string_view, int> TestMap;
-  TestMap map;
-
-  map.insert(std::make_pair(p1, 0));
-  map.insert(std::make_pair(p2, 1));
-  map.insert(std::make_pair(p3, 2));
-  EXPECT_EQ(map.size(), 3);
-
-  TestMap::const_iterator iter = map.begin();
-  EXPECT_EQ(iter->second, 1);
-  ++iter;
-  EXPECT_EQ(iter->second, 2);
-  ++iter;
-  EXPECT_EQ(iter->second, 0);
-  ++iter;
-  EXPECT_TRUE(iter == map.end());
-
-  TestMap::iterator new_iter = map.find("zot");
-  EXPECT_TRUE(new_iter == map.end());
-
-  new_iter = map.find("bar");
-  EXPECT_TRUE(new_iter != map.end());
-
-  map.erase(new_iter);
-  EXPECT_EQ(map.size(), 2);
-
-  iter = map.begin();
-  EXPECT_EQ(iter->second, 2);
-  ++iter;
-  EXPECT_EQ(iter->second, 0);
-  ++iter;
-  EXPECT_TRUE(iter == map.end());
-}
-
-#define COMPARE(result, op, x, y)                                      \
-  EXPECT_EQ(result, absl::string_view((x)) op absl::string_view((y))); \
-  EXPECT_EQ(result, absl::string_view((x)).compare(absl::string_view((y))) op 0)
-
-TEST(StringViewTest, ComparisonOperators) {
-  COMPARE(true, ==, "",   "");
-  COMPARE(true, ==, "", absl::string_view());
-  COMPARE(true, ==, absl::string_view(), "");
-  COMPARE(true, ==, "a",  "a");
-  COMPARE(true, ==, "aa", "aa");
-  COMPARE(false, ==, "a",  "");
-  COMPARE(false, ==, "",   "a");
-  COMPARE(false, ==, "a",  "b");
-  COMPARE(false, ==, "a",  "aa");
-  COMPARE(false, ==, "aa", "a");
-
-  COMPARE(false, !=, "",   "");
-  COMPARE(false, !=, "a",  "a");
-  COMPARE(false, !=, "aa", "aa");
-  COMPARE(true, !=, "a",  "");
-  COMPARE(true, !=, "",   "a");
-  COMPARE(true, !=, "a",  "b");
-  COMPARE(true, !=, "a",  "aa");
-  COMPARE(true, !=, "aa", "a");
-
-  COMPARE(true, <, "a",  "b");
-  COMPARE(true, <, "a",  "aa");
-  COMPARE(true, <, "aa", "b");
-  COMPARE(true, <, "aa", "bb");
-  COMPARE(false, <, "a",  "a");
-  COMPARE(false, <, "b",  "a");
-  COMPARE(false, <, "aa", "a");
-  COMPARE(false, <, "b",  "aa");
-  COMPARE(false, <, "bb", "aa");
-
-  COMPARE(true, <=, "a",  "a");
-  COMPARE(true, <=, "a",  "b");
-  COMPARE(true, <=, "a",  "aa");
-  COMPARE(true, <=, "aa", "b");
-  COMPARE(true, <=, "aa", "bb");
-  COMPARE(false, <=, "b",  "a");
-  COMPARE(false, <=, "aa", "a");
-  COMPARE(false, <=, "b",  "aa");
-  COMPARE(false, <=, "bb", "aa");
-
-  COMPARE(false, >=, "a",  "b");
-  COMPARE(false, >=, "a",  "aa");
-  COMPARE(false, >=, "aa", "b");
-  COMPARE(false, >=, "aa", "bb");
-  COMPARE(true, >=, "a",  "a");
-  COMPARE(true, >=, "b",  "a");
-  COMPARE(true, >=, "aa", "a");
-  COMPARE(true, >=, "b",  "aa");
-  COMPARE(true, >=, "bb", "aa");
-
-  COMPARE(false, >, "a",  "a");
-  COMPARE(false, >, "a",  "b");
-  COMPARE(false, >, "a",  "aa");
-  COMPARE(false, >, "aa", "b");
-  COMPARE(false, >, "aa", "bb");
-  COMPARE(true, >, "b",  "a");
-  COMPARE(true, >, "aa", "a");
-  COMPARE(true, >, "b",  "aa");
-  COMPARE(true, >, "bb", "aa");
-}
-
-TEST(StringViewTest, ComparisonOperatorsByCharacterPosition) {
-  std::string x;
-  for (int i = 0; i < 256; i++) {
-    x += 'a';
-    std::string y = x;
-    COMPARE(true, ==, x, y);
-    for (int j = 0; j < i; j++) {
-      std::string z = x;
-      z[j] = 'b';       // Differs in position 'j'
-      COMPARE(false, ==, x, z);
-      COMPARE(true, <, x, z);
-      COMPARE(true, >, z, x);
-      if (j + 1 < i) {
-        z[j + 1] = 'A';  // Differs in position 'j+1' as well
-        COMPARE(false, ==, x, z);
-        COMPARE(true, <, x, z);
-        COMPARE(true, >, z, x);
-        z[j + 1] = 'z';  // Differs in position 'j+1' as well
-        COMPARE(false, ==, x, z);
-        COMPARE(true, <, x, z);
-        COMPARE(true, >, z, x);
-      }
-    }
-  }
-}
-#undef COMPARE
-
-// Sadly, our users often confuse std::string::npos with
-// absl::string_view::npos; So much so that we test here that they are the same.
-// They need to both be unsigned, and both be the maximum-valued integer of
-// their type.
-
-template <typename T>
-struct is_type {
-  template <typename U>
-  static bool same(U) {
-    return false;
-  }
-  static bool same(T) { return true; }
-};
-
-TEST(StringViewTest, NposMatchesStdStringView) {
-  EXPECT_EQ(absl::string_view::npos, std::string::npos);
-
-  EXPECT_TRUE(is_type<size_t>::same(absl::string_view::npos));
-  EXPECT_FALSE(is_type<size_t>::same(""));
-
-  // Make sure absl::string_view::npos continues to be a header constant.
-  char test[absl::string_view::npos & 1] = {0};
-  EXPECT_EQ(0, test[0]);
-}
-
-TEST(StringViewTest, STL1) {
-  const absl::string_view a("abcdefghijklmnopqrstuvwxyz");
-  const absl::string_view b("abc");
-  const absl::string_view c("xyz");
-  const absl::string_view d("foobar");
-  const absl::string_view e;
-  std::string temp("123");
-  temp += '\0';
-  temp += "456";
-  const absl::string_view f(temp);
-
-  EXPECT_EQ(a[6], 'g');
-  EXPECT_EQ(b[0], 'a');
-  EXPECT_EQ(c[2], 'z');
-  EXPECT_EQ(f[3], '\0');
-  EXPECT_EQ(f[5], '5');
-
-  EXPECT_EQ(*d.data(), 'f');
-  EXPECT_EQ(d.data()[5], 'r');
-  EXPECT_TRUE(e.data() == nullptr);
-
-  EXPECT_EQ(*a.begin(), 'a');
-  EXPECT_EQ(*(b.begin() + 2), 'c');
-  EXPECT_EQ(*(c.end() - 1), 'z');
-
-  EXPECT_EQ(*a.rbegin(), 'z');
-  EXPECT_EQ(*(b.rbegin() + 2), 'a');
-  EXPECT_EQ(*(c.rend() - 1), 'x');
-  EXPECT_TRUE(a.rbegin() + 26 == a.rend());
-
-  EXPECT_EQ(a.size(), 26);
-  EXPECT_EQ(b.size(), 3);
-  EXPECT_EQ(c.size(), 3);
-  EXPECT_EQ(d.size(), 6);
-  EXPECT_EQ(e.size(), 0);
-  EXPECT_EQ(f.size(), 7);
-
-  EXPECT_TRUE(!d.empty());
-  EXPECT_TRUE(d.begin() != d.end());
-  EXPECT_TRUE(d.begin() + 6 == d.end());
-
-  EXPECT_TRUE(e.empty());
-  EXPECT_TRUE(e.begin() == e.end());
-
-  char buf[4] = { '%', '%', '%', '%' };
-  EXPECT_EQ(a.copy(buf, 4), 4);
-  EXPECT_EQ(buf[0], a[0]);
-  EXPECT_EQ(buf[1], a[1]);
-  EXPECT_EQ(buf[2], a[2]);
-  EXPECT_EQ(buf[3], a[3]);
-  EXPECT_EQ(a.copy(buf, 3, 7), 3);
-  EXPECT_EQ(buf[0], a[7]);
-  EXPECT_EQ(buf[1], a[8]);
-  EXPECT_EQ(buf[2], a[9]);
-  EXPECT_EQ(buf[3], a[3]);
-  EXPECT_EQ(c.copy(buf, 99), 3);
-  EXPECT_EQ(buf[0], c[0]);
-  EXPECT_EQ(buf[1], c[1]);
-  EXPECT_EQ(buf[2], c[2]);
-  EXPECT_EQ(buf[3], a[3]);
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW(a.copy(buf, 1, 27), std::out_of_range);
-#else
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(a.copy(buf, 1, 27), "absl::string_view::copy");
-#endif
-}
-
-// Separated from STL1() because some compilers produce an overly
-// large stack frame for the combined function.
-TEST(StringViewTest, STL2) {
-  const absl::string_view a("abcdefghijklmnopqrstuvwxyz");
-  const absl::string_view b("abc");
-  const absl::string_view c("xyz");
-  absl::string_view d("foobar");
-  const absl::string_view e;
-  const absl::string_view f(
-      "123"
-      "\0"
-      "456",
-      7);
-
-  d = absl::string_view();
-  EXPECT_EQ(d.size(), 0);
-  EXPECT_TRUE(d.empty());
-  EXPECT_TRUE(d.data() == nullptr);
-  EXPECT_TRUE(d.begin() == d.end());
-
-  EXPECT_EQ(a.find(b), 0);
-  EXPECT_EQ(a.find(b, 1), absl::string_view::npos);
-  EXPECT_EQ(a.find(c), 23);
-  EXPECT_EQ(a.find(c, 9), 23);
-  EXPECT_EQ(a.find(c, absl::string_view::npos), absl::string_view::npos);
-  EXPECT_EQ(b.find(c), absl::string_view::npos);
-  EXPECT_EQ(b.find(c, absl::string_view::npos), absl::string_view::npos);
-  EXPECT_EQ(a.find(d), 0);
-  EXPECT_EQ(a.find(e), 0);
-  EXPECT_EQ(a.find(d, 12), 12);
-  EXPECT_EQ(a.find(e, 17), 17);
-  absl::string_view g("xx not found bb");
-  EXPECT_EQ(a.find(g), absl::string_view::npos);
-  // empty string nonsense
-  EXPECT_EQ(d.find(b), absl::string_view::npos);
-  EXPECT_EQ(e.find(b), absl::string_view::npos);
-  EXPECT_EQ(d.find(b, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find(b, 7), absl::string_view::npos);
-
-  size_t empty_search_pos = std::string().find(std::string());
-  EXPECT_EQ(d.find(d), empty_search_pos);
-  EXPECT_EQ(d.find(e), empty_search_pos);
-  EXPECT_EQ(e.find(d), empty_search_pos);
-  EXPECT_EQ(e.find(e), empty_search_pos);
-  EXPECT_EQ(d.find(d, 4), std::string().find(std::string(), 4));
-  EXPECT_EQ(d.find(e, 4), std::string().find(std::string(), 4));
-  EXPECT_EQ(e.find(d, 4), std::string().find(std::string(), 4));
-  EXPECT_EQ(e.find(e, 4), std::string().find(std::string(), 4));
-
-  EXPECT_EQ(a.find('a'), 0);
-  EXPECT_EQ(a.find('c'), 2);
-  EXPECT_EQ(a.find('z'), 25);
-  EXPECT_EQ(a.find('$'), absl::string_view::npos);
-  EXPECT_EQ(a.find('\0'), absl::string_view::npos);
-  EXPECT_EQ(f.find('\0'), 3);
-  EXPECT_EQ(f.find('3'), 2);
-  EXPECT_EQ(f.find('5'), 5);
-  EXPECT_EQ(g.find('o'), 4);
-  EXPECT_EQ(g.find('o', 4), 4);
-  EXPECT_EQ(g.find('o', 5), 8);
-  EXPECT_EQ(a.find('b', 5), absl::string_view::npos);
-  // empty string nonsense
-  EXPECT_EQ(d.find('\0'), absl::string_view::npos);
-  EXPECT_EQ(e.find('\0'), absl::string_view::npos);
-  EXPECT_EQ(d.find('\0', 4), absl::string_view::npos);
-  EXPECT_EQ(e.find('\0', 7), absl::string_view::npos);
-  EXPECT_EQ(d.find('x'), absl::string_view::npos);
-  EXPECT_EQ(e.find('x'), absl::string_view::npos);
-  EXPECT_EQ(d.find('x', 4), absl::string_view::npos);
-  EXPECT_EQ(e.find('x', 7), absl::string_view::npos);
-
-  EXPECT_EQ(a.rfind(b), 0);
-  EXPECT_EQ(a.rfind(b, 1), 0);
-  EXPECT_EQ(a.rfind(c), 23);
-  EXPECT_EQ(a.rfind(c, 22), absl::string_view::npos);
-  EXPECT_EQ(a.rfind(c, 1), absl::string_view::npos);
-  EXPECT_EQ(a.rfind(c, 0), absl::string_view::npos);
-  EXPECT_EQ(b.rfind(c), absl::string_view::npos);
-  EXPECT_EQ(b.rfind(c, 0), absl::string_view::npos);
-  EXPECT_EQ(a.rfind(d), std::string(a).rfind(std::string()));
-  EXPECT_EQ(a.rfind(e), std::string(a).rfind(std::string()));
-  EXPECT_EQ(a.rfind(d, 12), 12);
-  EXPECT_EQ(a.rfind(e, 17), 17);
-  EXPECT_EQ(a.rfind(g), absl::string_view::npos);
-  EXPECT_EQ(d.rfind(b), absl::string_view::npos);
-  EXPECT_EQ(e.rfind(b), absl::string_view::npos);
-  EXPECT_EQ(d.rfind(b, 4), absl::string_view::npos);
-  EXPECT_EQ(e.rfind(b, 7), absl::string_view::npos);
-  // empty string nonsense
-  EXPECT_EQ(d.rfind(d, 4), std::string().rfind(std::string()));
-  EXPECT_EQ(e.rfind(d, 7), std::string().rfind(std::string()));
-  EXPECT_EQ(d.rfind(e, 4), std::string().rfind(std::string()));
-  EXPECT_EQ(e.rfind(e, 7), std::string().rfind(std::string()));
-  EXPECT_EQ(d.rfind(d), std::string().rfind(std::string()));
-  EXPECT_EQ(e.rfind(d), std::string().rfind(std::string()));
-  EXPECT_EQ(d.rfind(e), std::string().rfind(std::string()));
-  EXPECT_EQ(e.rfind(e), std::string().rfind(std::string()));
-
-  EXPECT_EQ(g.rfind('o'), 8);
-  EXPECT_EQ(g.rfind('q'), absl::string_view::npos);
-  EXPECT_EQ(g.rfind('o', 8), 8);
-  EXPECT_EQ(g.rfind('o', 7), 4);
-  EXPECT_EQ(g.rfind('o', 3), absl::string_view::npos);
-  EXPECT_EQ(f.rfind('\0'), 3);
-  EXPECT_EQ(f.rfind('\0', 12), 3);
-  EXPECT_EQ(f.rfind('3'), 2);
-  EXPECT_EQ(f.rfind('5'), 5);
-  // empty string nonsense
-  EXPECT_EQ(d.rfind('o'), absl::string_view::npos);
-  EXPECT_EQ(e.rfind('o'), absl::string_view::npos);
-  EXPECT_EQ(d.rfind('o', 4), absl::string_view::npos);
-  EXPECT_EQ(e.rfind('o', 7), absl::string_view::npos);
-}
-
-// Continued from STL2
-TEST(StringViewTest, STL2FindFirst) {
-  const absl::string_view a("abcdefghijklmnopqrstuvwxyz");
-  const absl::string_view b("abc");
-  const absl::string_view c("xyz");
-  absl::string_view d("foobar");
-  const absl::string_view e;
-  const absl::string_view f(
-      "123"
-      "\0"
-      "456",
-      7);
-  absl::string_view g("xx not found bb");
-
-  d = absl::string_view();
-  EXPECT_EQ(a.find_first_of(b), 0);
-  EXPECT_EQ(a.find_first_of(b, 0), 0);
-  EXPECT_EQ(a.find_first_of(b, 1), 1);
-  EXPECT_EQ(a.find_first_of(b, 2), 2);
-  EXPECT_EQ(a.find_first_of(b, 3), absl::string_view::npos);
-  EXPECT_EQ(a.find_first_of(c), 23);
-  EXPECT_EQ(a.find_first_of(c, 23), 23);
-  EXPECT_EQ(a.find_first_of(c, 24), 24);
-  EXPECT_EQ(a.find_first_of(c, 25), 25);
-  EXPECT_EQ(a.find_first_of(c, 26), absl::string_view::npos);
-  EXPECT_EQ(g.find_first_of(b), 13);
-  EXPECT_EQ(g.find_first_of(c), 0);
-  EXPECT_EQ(a.find_first_of(f), absl::string_view::npos);
-  EXPECT_EQ(f.find_first_of(a), absl::string_view::npos);
-  // empty string nonsense
-  EXPECT_EQ(a.find_first_of(d), absl::string_view::npos);
-  EXPECT_EQ(a.find_first_of(e), absl::string_view::npos);
-  EXPECT_EQ(d.find_first_of(b), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_of(b), absl::string_view::npos);
-  EXPECT_EQ(d.find_first_of(d), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_of(d), absl::string_view::npos);
-  EXPECT_EQ(d.find_first_of(e), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_of(e), absl::string_view::npos);
-
-  EXPECT_EQ(a.find_first_not_of(b), 3);
-  EXPECT_EQ(a.find_first_not_of(c), 0);
-  EXPECT_EQ(b.find_first_not_of(a), absl::string_view::npos);
-  EXPECT_EQ(c.find_first_not_of(a), absl::string_view::npos);
-  EXPECT_EQ(f.find_first_not_of(a), 0);
-  EXPECT_EQ(a.find_first_not_of(f), 0);
-  EXPECT_EQ(a.find_first_not_of(d), 0);
-  EXPECT_EQ(a.find_first_not_of(e), 0);
-  // empty string nonsense
-  EXPECT_EQ(a.find_first_not_of(d), 0);
-  EXPECT_EQ(a.find_first_not_of(e), 0);
-  EXPECT_EQ(a.find_first_not_of(d, 1), 1);
-  EXPECT_EQ(a.find_first_not_of(e, 1), 1);
-  EXPECT_EQ(a.find_first_not_of(d, a.size() - 1), a.size() - 1);
-  EXPECT_EQ(a.find_first_not_of(e, a.size() - 1), a.size() - 1);
-  EXPECT_EQ(a.find_first_not_of(d, a.size()), absl::string_view::npos);
-  EXPECT_EQ(a.find_first_not_of(e, a.size()), absl::string_view::npos);
-  EXPECT_EQ(a.find_first_not_of(d, absl::string_view::npos),
-            absl::string_view::npos);
-  EXPECT_EQ(a.find_first_not_of(e, absl::string_view::npos),
-            absl::string_view::npos);
-  EXPECT_EQ(d.find_first_not_of(a), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_not_of(a), absl::string_view::npos);
-  EXPECT_EQ(d.find_first_not_of(d), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_not_of(d), absl::string_view::npos);
-  EXPECT_EQ(d.find_first_not_of(e), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_not_of(e), absl::string_view::npos);
-
-  absl::string_view h("====");
-  EXPECT_EQ(h.find_first_not_of('='), absl::string_view::npos);
-  EXPECT_EQ(h.find_first_not_of('=', 3), absl::string_view::npos);
-  EXPECT_EQ(h.find_first_not_of('\0'), 0);
-  EXPECT_EQ(g.find_first_not_of('x'), 2);
-  EXPECT_EQ(f.find_first_not_of('\0'), 0);
-  EXPECT_EQ(f.find_first_not_of('\0', 3), 4);
-  EXPECT_EQ(f.find_first_not_of('\0', 2), 2);
-  // empty string nonsense
-  EXPECT_EQ(d.find_first_not_of('x'), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_not_of('x'), absl::string_view::npos);
-  EXPECT_EQ(d.find_first_not_of('\0'), absl::string_view::npos);
-  EXPECT_EQ(e.find_first_not_of('\0'), absl::string_view::npos);
-}
-
-// Continued from STL2
-TEST(StringViewTest, STL2FindLast) {
-  const absl::string_view a("abcdefghijklmnopqrstuvwxyz");
-  const absl::string_view b("abc");
-  const absl::string_view c("xyz");
-  absl::string_view d("foobar");
-  const absl::string_view e;
-  const absl::string_view f(
-      "123"
-      "\0"
-      "456",
-      7);
-  absl::string_view g("xx not found bb");
-  absl::string_view h("====");
-  absl::string_view i("56");
-
-  d = absl::string_view();
-  EXPECT_EQ(h.find_last_of(a), absl::string_view::npos);
-  EXPECT_EQ(g.find_last_of(a), g.size()-1);
-  EXPECT_EQ(a.find_last_of(b), 2);
-  EXPECT_EQ(a.find_last_of(c), a.size()-1);
-  EXPECT_EQ(f.find_last_of(i), 6);
-  EXPECT_EQ(a.find_last_of('a'), 0);
-  EXPECT_EQ(a.find_last_of('b'), 1);
-  EXPECT_EQ(a.find_last_of('z'), 25);
-  EXPECT_EQ(a.find_last_of('a', 5), 0);
-  EXPECT_EQ(a.find_last_of('b', 5), 1);
-  EXPECT_EQ(a.find_last_of('b', 0), absl::string_view::npos);
-  EXPECT_EQ(a.find_last_of('z', 25), 25);
-  EXPECT_EQ(a.find_last_of('z', 24), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_of(i, 5), 5);
-  EXPECT_EQ(f.find_last_of(i, 6), 6);
-  EXPECT_EQ(f.find_last_of(a, 4), absl::string_view::npos);
-  // empty string nonsense
-  EXPECT_EQ(f.find_last_of(d), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_of(e), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_of(d, 4), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_of(e, 4), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_of(d), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_of(e), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_of(d), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_of(e), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_of(f), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_of(f), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_of(d, 4), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_of(e, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_of(d, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_of(e, 4), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_of(f, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_of(f, 4), absl::string_view::npos);
-
-  EXPECT_EQ(a.find_last_not_of(b), a.size()-1);
-  EXPECT_EQ(a.find_last_not_of(c), 22);
-  EXPECT_EQ(b.find_last_not_of(a), absl::string_view::npos);
-  EXPECT_EQ(b.find_last_not_of(b), absl::string_view::npos);
-  EXPECT_EQ(f.find_last_not_of(i), 4);
-  EXPECT_EQ(a.find_last_not_of(c, 24), 22);
-  EXPECT_EQ(a.find_last_not_of(b, 3), 3);
-  EXPECT_EQ(a.find_last_not_of(b, 2), absl::string_view::npos);
-  // empty string nonsense
-  EXPECT_EQ(f.find_last_not_of(d), f.size()-1);
-  EXPECT_EQ(f.find_last_not_of(e), f.size()-1);
-  EXPECT_EQ(f.find_last_not_of(d, 4), 4);
-  EXPECT_EQ(f.find_last_not_of(e, 4), 4);
-  EXPECT_EQ(d.find_last_not_of(d), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_not_of(e), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of(d), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of(e), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_not_of(f), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of(f), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_not_of(d, 4), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_not_of(e, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of(d, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of(e, 4), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_not_of(f, 4), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of(f, 4), absl::string_view::npos);
-
-  EXPECT_EQ(h.find_last_not_of('x'), h.size() - 1);
-  EXPECT_EQ(h.find_last_not_of('='), absl::string_view::npos);
-  EXPECT_EQ(b.find_last_not_of('c'), 1);
-  EXPECT_EQ(h.find_last_not_of('x', 2), 2);
-  EXPECT_EQ(h.find_last_not_of('=', 2), absl::string_view::npos);
-  EXPECT_EQ(b.find_last_not_of('b', 1), 0);
-  // empty string nonsense
-  EXPECT_EQ(d.find_last_not_of('x'), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of('x'), absl::string_view::npos);
-  EXPECT_EQ(d.find_last_not_of('\0'), absl::string_view::npos);
-  EXPECT_EQ(e.find_last_not_of('\0'), absl::string_view::npos);
-}
-
-// Continued from STL2
-TEST(StringViewTest, STL2Substr) {
-  const absl::string_view a("abcdefghijklmnopqrstuvwxyz");
-  const absl::string_view b("abc");
-  const absl::string_view c("xyz");
-  absl::string_view d("foobar");
-  const absl::string_view e;
-
-  d = absl::string_view();
-  EXPECT_EQ(a.substr(0, 3), b);
-  EXPECT_EQ(a.substr(23), c);
-  EXPECT_EQ(a.substr(23, 3), c);
-  EXPECT_EQ(a.substr(23, 99), c);
-  EXPECT_EQ(a.substr(0), a);
-  EXPECT_EQ(a.substr(3, 2), "de");
-  // empty string nonsense
-  EXPECT_EQ(d.substr(0, 99), e);
-  // use of npos
-  EXPECT_EQ(a.substr(0, absl::string_view::npos), a);
-  EXPECT_EQ(a.substr(23, absl::string_view::npos), c);
-  // throw exception
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW((void)a.substr(99, 2), std::out_of_range);
-#else
-  ABSL_EXPECT_DEATH_IF_SUPPORTED((void)a.substr(99, 2),
-                                 "absl::string_view::substr");
-#endif
-}
-
-TEST(StringViewTest, TruncSubstr) {
-  const absl::string_view hi("hi");
-  EXPECT_EQ("", absl::ClippedSubstr(hi, 0, 0));
-  EXPECT_EQ("h", absl::ClippedSubstr(hi, 0, 1));
-  EXPECT_EQ("hi", absl::ClippedSubstr(hi, 0));
-  EXPECT_EQ("i", absl::ClippedSubstr(hi, 1));
-  EXPECT_EQ("", absl::ClippedSubstr(hi, 2));
-  EXPECT_EQ("", absl::ClippedSubstr(hi, 3));  // truncation
-  EXPECT_EQ("", absl::ClippedSubstr(hi, 3, 2));  // truncation
-}
-
-TEST(StringViewTest, UTF8) {
-  std::string utf8 = "\u00E1";
-  std::string utf8_twice = utf8 + " " + utf8;
-  int utf8_len = strlen(utf8.data());
-  EXPECT_EQ(utf8_len, absl::string_view(utf8_twice).find_first_of(" "));
-  EXPECT_EQ(utf8_len, absl::string_view(utf8_twice).find_first_of(" \t"));
-}
-
-TEST(StringViewTest, FindConformance) {
-  struct {
-    std::string haystack;
-    std::string needle;
-  } specs[] = {
-    {"", ""},
-    {"", "a"},
-    {"a", ""},
-    {"a", "a"},
-    {"a", "b"},
-    {"aa", ""},
-    {"aa", "a"},
-    {"aa", "b"},
-    {"ab", "a"},
-    {"ab", "b"},
-    {"abcd", ""},
-    {"abcd", "a"},
-    {"abcd", "d"},
-    {"abcd", "ab"},
-    {"abcd", "bc"},
-    {"abcd", "cd"},
-    {"abcd", "abcd"},
-  };
-  for (const auto& s : specs) {
-    SCOPED_TRACE(s.haystack);
-    SCOPED_TRACE(s.needle);
-    std::string st = s.haystack;
-    absl::string_view sp = s.haystack;
-    for (size_t i = 0; i <= sp.size(); ++i) {
-      size_t pos = (i == sp.size()) ? absl::string_view::npos : i;
-      SCOPED_TRACE(pos);
-      EXPECT_EQ(sp.find(s.needle, pos),
-                st.find(s.needle, pos));
-      EXPECT_EQ(sp.rfind(s.needle, pos),
-                st.rfind(s.needle, pos));
-      EXPECT_EQ(sp.find_first_of(s.needle, pos),
-                st.find_first_of(s.needle, pos));
-      EXPECT_EQ(sp.find_first_not_of(s.needle, pos),
-                st.find_first_not_of(s.needle, pos));
-      EXPECT_EQ(sp.find_last_of(s.needle, pos),
-                st.find_last_of(s.needle, pos));
-      EXPECT_EQ(sp.find_last_not_of(s.needle, pos),
-                st.find_last_not_of(s.needle, pos));
-    }
-  }
-}
-
-TEST(StringViewTest, Remove) {
-  absl::string_view a("foobar");
-  std::string s1("123");
-  s1 += '\0';
-  s1 += "456";
-  absl::string_view e;
-  std::string s2;
-
-  // remove_prefix
-  absl::string_view c(a);
-  c.remove_prefix(3);
-  EXPECT_EQ(c, "bar");
-  c = a;
-  c.remove_prefix(0);
-  EXPECT_EQ(c, a);
-  c.remove_prefix(c.size());
-  EXPECT_EQ(c, e);
-
-  // remove_suffix
-  c = a;
-  c.remove_suffix(3);
-  EXPECT_EQ(c, "foo");
-  c = a;
-  c.remove_suffix(0);
-  EXPECT_EQ(c, a);
-  c.remove_suffix(c.size());
-  EXPECT_EQ(c, e);
-}
-
-TEST(StringViewTest, Set) {
-  absl::string_view a("foobar");
-  absl::string_view empty;
-  absl::string_view b;
-
-  // set
-  b = absl::string_view("foobar", 6);
-  EXPECT_EQ(b, a);
-  b = absl::string_view("foobar", 0);
-  EXPECT_EQ(b, empty);
-  b = absl::string_view("foobar", 7);
-  EXPECT_NE(b, a);
-
-  b = absl::string_view("foobar");
-  EXPECT_EQ(b, a);
-}
-
-TEST(StringViewTest, FrontBack) {
-  static const char arr[] = "abcd";
-  const absl::string_view csp(arr, 4);
-  EXPECT_EQ(&arr[0], &csp.front());
-  EXPECT_EQ(&arr[3], &csp.back());
-}
-
-TEST(StringViewTest, FrontBackSingleChar) {
-  static const char c = 'a';
-  const absl::string_view csp(&c, 1);
-  EXPECT_EQ(&c, &csp.front());
-  EXPECT_EQ(&c, &csp.back());
-}
-
-TEST(StringViewTest, FrontBackEmpty) {
-#ifndef ABSL_USES_STD_STRING_VIEW
-#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
-  // Abseil's string_view implementation has debug assertions that check that
-  // front() and back() are not called on an empty string_view.
-  absl::string_view sv;
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(sv.front(), "");
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(sv.back(), "");
-#endif
-#endif
-}
-
-// `std::string_view::string_view(const char*)` calls
-// `std::char_traits<char>::length(const char*)` to get the string length. In
-// libc++, it doesn't allow `nullptr` in the constexpr context, with the error
-// "read of dereferenced null pointer is not allowed in a constant expression".
-// At run time, the behavior of `std::char_traits::length()` on `nullptr` is
-// undefined by the standard and usually results in crash with libc++.
-// GCC also started rejected this in libstdc++ starting in GCC9.
-// In MSVC, creating a constexpr string_view from nullptr also triggers an
-// "unevaluable pointer value" error. This compiler implementation conforms
-// to the standard, but `absl::string_view` implements a different
-// behavior for historical reasons. We work around tests that construct
-// `string_view` from `nullptr` when using libc++.
-#if !defined(ABSL_USES_STD_STRING_VIEW) ||                    \
-    (!(defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE >= 9) && \
-     !defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
-#define ABSL_HAVE_STRING_VIEW_FROM_NULLPTR 1
-#endif
-
-TEST(StringViewTest, NULLInput) {
-  absl::string_view s;
-  EXPECT_EQ(s.data(), nullptr);
-  EXPECT_EQ(s.size(), 0);
-
-#ifdef ABSL_HAVE_STRING_VIEW_FROM_NULLPTR
-  s = absl::string_view(nullptr);
-  EXPECT_EQ(s.data(), nullptr);
-  EXPECT_EQ(s.size(), 0);
-
-  // .ToString() on a absl::string_view with nullptr should produce the empty
-  // string.
-  EXPECT_EQ("", std::string(s));
-#endif  // ABSL_HAVE_STRING_VIEW_FROM_NULLPTR
-}
-
-TEST(StringViewTest, Comparisons2) {
-  // The `compare` member has 6 overloads (v: string_view, s: const char*):
-  //  (1) compare(v)
-  //  (2) compare(pos1, count1, v)
-  //  (3) compare(pos1, count1, v, pos2, count2)
-  //  (4) compare(s)
-  //  (5) compare(pos1, count1, s)
-  //  (6) compare(pos1, count1, s, count2)
-
-  absl::string_view abc("abcdefghijklmnopqrstuvwxyz");
-
-  // check comparison operations on strings longer than 4 bytes.
-  EXPECT_EQ(abc, absl::string_view("abcdefghijklmnopqrstuvwxyz"));
-  EXPECT_EQ(abc.compare(absl::string_view("abcdefghijklmnopqrstuvwxyz")), 0);
-
-  EXPECT_LT(abc, absl::string_view("abcdefghijklmnopqrstuvwxzz"));
-  EXPECT_LT(abc.compare(absl::string_view("abcdefghijklmnopqrstuvwxzz")), 0);
-
-  EXPECT_GT(abc, absl::string_view("abcdefghijklmnopqrstuvwxyy"));
-  EXPECT_GT(abc.compare(absl::string_view("abcdefghijklmnopqrstuvwxyy")), 0);
-
-  // The "substr" variants of `compare`.
-  absl::string_view digits("0123456789");
-  auto npos = absl::string_view::npos;
-
-  // Taking string_view
-  EXPECT_EQ(digits.compare(3, npos, absl::string_view("3456789")), 0);  // 2
-  EXPECT_EQ(digits.compare(3, 4, absl::string_view("3456")), 0);        // 2
-  EXPECT_EQ(digits.compare(10, 0, absl::string_view()), 0);             // 2
-  EXPECT_EQ(digits.compare(3, 4, absl::string_view("0123456789"), 3, 4),
-            0);  // 3
-  EXPECT_LT(digits.compare(3, 4, absl::string_view("0123456789"), 3, 5),
-            0);  // 3
-  EXPECT_LT(digits.compare(0, npos, absl::string_view("0123456789"), 3, 5),
-            0);  // 3
-  // Taking const char*
-  EXPECT_EQ(digits.compare(3, 4, "3456"), 0);                 // 5
-  EXPECT_EQ(digits.compare(3, npos, "3456789"), 0);           // 5
-  EXPECT_EQ(digits.compare(10, 0, ""), 0);                    // 5
-  EXPECT_EQ(digits.compare(3, 4, "0123456789", 3, 4), 0);     // 6
-  EXPECT_LT(digits.compare(3, 4, "0123456789", 3, 5), 0);     // 6
-  EXPECT_LT(digits.compare(0, npos, "0123456789", 3, 5), 0);  // 6
-}
-
-TEST(StringViewTest, At) {
-  absl::string_view abc = "abc";
-  EXPECT_EQ(abc.at(0), 'a');
-  EXPECT_EQ(abc.at(1), 'b');
-  EXPECT_EQ(abc.at(2), 'c');
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW((void)abc.at(3), std::out_of_range);
-#else
-  ABSL_EXPECT_DEATH_IF_SUPPORTED((void)abc.at(3), "absl::string_view::at");
-#endif
-}
-
-struct MyCharAlloc : std::allocator<char> {};
-
-TEST(StringViewTest, ExplicitConversionOperator) {
-  absl::string_view sp = "hi";
-  EXPECT_EQ(sp, std::string(sp));
-}
-
-TEST(StringViewTest, NullSafeStringView) {
-  {
-    absl::string_view s = absl::NullSafeStringView(nullptr);
-    EXPECT_EQ(nullptr, s.data());
-    EXPECT_EQ(0, s.size());
-    EXPECT_EQ(absl::string_view(), s);
-  }
-  {
-    static const char kHi[] = "hi";
-    absl::string_view s = absl::NullSafeStringView(kHi);
-    EXPECT_EQ(kHi, s.data());
-    EXPECT_EQ(strlen(kHi), s.size());
-    EXPECT_EQ(absl::string_view("hi"), s);
-  }
-}
-
-TEST(StringViewTest, ConstexprNullSafeStringView) {
-  {
-    constexpr absl::string_view s = absl::NullSafeStringView(nullptr);
-    EXPECT_EQ(nullptr, s.data());
-    EXPECT_EQ(0, s.size());
-    EXPECT_EQ(absl::string_view(), s);
-  }
-#if !defined(_MSC_VER) || _MSC_VER >= 1910
-  // MSVC 2017+ is required for good constexpr string_view support.
-  // See the implementation of `absl::string_view::StrlenInternal()`.
-  {
-    static constexpr char kHi[] = "hi";
-    absl::string_view s = absl::NullSafeStringView(kHi);
-    EXPECT_EQ(kHi, s.data());
-    EXPECT_EQ(strlen(kHi), s.size());
-    EXPECT_EQ(absl::string_view("hi"), s);
-  }
-  {
-    constexpr absl::string_view s = absl::NullSafeStringView("hello");
-    EXPECT_EQ(s.size(), 5);
-    EXPECT_EQ("hello", s);
-  }
-#endif
-}
-
-TEST(StringViewTest, ConstexprCompiles) {
-  constexpr absl::string_view sp;
-#ifdef ABSL_HAVE_STRING_VIEW_FROM_NULLPTR
-  constexpr absl::string_view cstr(nullptr);
-#endif
-  constexpr absl::string_view cstr_len("cstr", 4);
-
-#if defined(ABSL_USES_STD_STRING_VIEW)
-  // In libstdc++ (as of 7.2), `std::string_view::string_view(const char*)`
-  // calls `std::char_traits<char>::length(const char*)` to get the string
-  // length, but it is not marked constexpr yet. See GCC bug:
-  // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78156
-  // Also, there is a LWG issue that adds constexpr to length() which was just
-  // resolved 2017-06-02. See
-  // http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#2232
-  // TODO(zhangxy): Update the condition when libstdc++ adopts the constexpr
-  // length().
-#if !defined(__GLIBCXX__)
-#define ABSL_HAVE_CONSTEXPR_STRING_VIEW_FROM_CSTR 1
-#endif  // !__GLIBCXX__
-
-#else  // ABSL_USES_STD_STRING_VIEW
-
-// This duplicates the check for __builtin_strlen in the header.
-#if ABSL_HAVE_BUILTIN(__builtin_strlen) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_HAVE_CONSTEXPR_STRING_VIEW_FROM_CSTR 1
-#elif defined(__GNUC__)  // GCC or clang
-#error GCC/clang should have constexpr string_view.
-#endif
-
-// MSVC 2017+ should be able to construct a constexpr string_view from a cstr.
-#if defined(_MSC_VER) && _MSC_VER >= 1910
-#define ABSL_HAVE_CONSTEXPR_STRING_VIEW_FROM_CSTR 1
-#endif
-
-#endif  // ABSL_USES_STD_STRING_VIEW
-
-#ifdef ABSL_HAVE_CONSTEXPR_STRING_VIEW_FROM_CSTR
-  constexpr absl::string_view cstr_strlen("foo");
-  EXPECT_EQ(cstr_strlen.length(), 3);
-  constexpr absl::string_view cstr_strlen2 = "bar";
-  EXPECT_EQ(cstr_strlen2, "bar");
-
-#if ABSL_HAVE_BUILTIN(__builtin_memcmp) || \
-    (defined(__GNUC__) && !defined(__clang__))
-#define ABSL_HAVE_CONSTEXPR_STRING_VIEW_COMPARISON 1
-#endif
-#ifdef ABSL_HAVE_CONSTEXPR_STRING_VIEW_COMPARISON
-  constexpr absl::string_view foo = "foo";
-  constexpr absl::string_view bar = "bar";
-  constexpr bool foo_eq_bar = foo == bar;
-  constexpr bool foo_ne_bar = foo != bar;
-  constexpr bool foo_lt_bar = foo < bar;
-  constexpr bool foo_le_bar = foo <= bar;
-  constexpr bool foo_gt_bar = foo > bar;
-  constexpr bool foo_ge_bar = foo >= bar;
-  constexpr int foo_compare_bar = foo.compare(bar);
-  EXPECT_FALSE(foo_eq_bar);
-  EXPECT_TRUE(foo_ne_bar);
-  EXPECT_FALSE(foo_lt_bar);
-  EXPECT_FALSE(foo_le_bar);
-  EXPECT_TRUE(foo_gt_bar);
-  EXPECT_TRUE(foo_ge_bar);
-  EXPECT_GT(foo_compare_bar, 0);
-#endif
-#endif
-
-#if !defined(__clang__) || 3 < __clang_major__ || \
-  (3 == __clang_major__ && 4 < __clang_minor__)
-  // older clang versions (< 3.5) complain that:
-  //   "cannot perform pointer arithmetic on null pointer"
-  constexpr absl::string_view::iterator const_begin_empty = sp.begin();
-  constexpr absl::string_view::iterator const_end_empty = sp.end();
-  EXPECT_EQ(const_begin_empty, const_end_empty);
-
-#ifdef ABSL_HAVE_STRING_VIEW_FROM_NULLPTR
-  constexpr absl::string_view::iterator const_begin_nullptr = cstr.begin();
-  constexpr absl::string_view::iterator const_end_nullptr = cstr.end();
-  EXPECT_EQ(const_begin_nullptr, const_end_nullptr);
-#endif  // ABSL_HAVE_STRING_VIEW_FROM_NULLPTR
-#endif  // !defined(__clang__) || ...
-
-  constexpr absl::string_view::iterator const_begin = cstr_len.begin();
-  constexpr absl::string_view::iterator const_end = cstr_len.end();
-  constexpr absl::string_view::size_type const_size = cstr_len.size();
-  constexpr absl::string_view::size_type const_length = cstr_len.length();
-  static_assert(const_begin + const_size == const_end,
-                "pointer arithmetic check");
-  static_assert(const_begin + const_length == const_end,
-                "pointer arithmetic check");
-#ifndef _MSC_VER
-  // MSVC has bugs doing constexpr pointer arithmetic.
-  // https://developercommunity.visualstudio.com/content/problem/482192/bad-pointer-arithmetic-in-constepxr-2019-rc1-svc1.html
-  EXPECT_EQ(const_begin + const_size, const_end);
-  EXPECT_EQ(const_begin + const_length, const_end);
-#endif
-
-  constexpr bool isempty = sp.empty();
-  EXPECT_TRUE(isempty);
-
-  constexpr const char c = cstr_len[2];
-  EXPECT_EQ(c, 't');
-
-  constexpr const char cfront = cstr_len.front();
-  constexpr const char cback = cstr_len.back();
-  EXPECT_EQ(cfront, 'c');
-  EXPECT_EQ(cback, 'r');
-
-  constexpr const char* np = sp.data();
-  constexpr const char* cstr_ptr = cstr_len.data();
-  EXPECT_EQ(np, nullptr);
-  EXPECT_NE(cstr_ptr, nullptr);
-
-  constexpr size_t sp_npos = sp.npos;
-  EXPECT_EQ(sp_npos, -1);
-}
-
-TEST(StringViewTest, ConstexprSubstr) {
-  constexpr absl::string_view foobar("foobar", 6);
-  constexpr absl::string_view foo = foobar.substr(0, 3);
-  constexpr absl::string_view bar = foobar.substr(3);
-  EXPECT_EQ(foo, "foo");
-  EXPECT_EQ(bar, "bar");
-}
-
-TEST(StringViewTest, Noexcept) {
-  EXPECT_TRUE((std::is_nothrow_constructible<absl::string_view,
-                                             const std::string&>::value));
-  EXPECT_TRUE((std::is_nothrow_constructible<absl::string_view,
-                                             const std::string&>::value));
-  EXPECT_TRUE(std::is_nothrow_constructible<absl::string_view>::value);
-  constexpr absl::string_view sp;
-  EXPECT_TRUE(noexcept(sp.begin()));
-  EXPECT_TRUE(noexcept(sp.end()));
-  EXPECT_TRUE(noexcept(sp.cbegin()));
-  EXPECT_TRUE(noexcept(sp.cend()));
-  EXPECT_TRUE(noexcept(sp.rbegin()));
-  EXPECT_TRUE(noexcept(sp.rend()));
-  EXPECT_TRUE(noexcept(sp.crbegin()));
-  EXPECT_TRUE(noexcept(sp.crend()));
-  EXPECT_TRUE(noexcept(sp.size()));
-  EXPECT_TRUE(noexcept(sp.length()));
-  EXPECT_TRUE(noexcept(sp.empty()));
-  EXPECT_TRUE(noexcept(sp.data()));
-  EXPECT_TRUE(noexcept(sp.compare(sp)));
-  EXPECT_TRUE(noexcept(sp.find(sp)));
-  EXPECT_TRUE(noexcept(sp.find('f')));
-  EXPECT_TRUE(noexcept(sp.rfind(sp)));
-  EXPECT_TRUE(noexcept(sp.rfind('f')));
-  EXPECT_TRUE(noexcept(sp.find_first_of(sp)));
-  EXPECT_TRUE(noexcept(sp.find_first_of('f')));
-  EXPECT_TRUE(noexcept(sp.find_last_of(sp)));
-  EXPECT_TRUE(noexcept(sp.find_last_of('f')));
-  EXPECT_TRUE(noexcept(sp.find_first_not_of(sp)));
-  EXPECT_TRUE(noexcept(sp.find_first_not_of('f')));
-  EXPECT_TRUE(noexcept(sp.find_last_not_of(sp)));
-  EXPECT_TRUE(noexcept(sp.find_last_not_of('f')));
-}
-
-TEST(StringViewTest, BoundsCheck) {
-#ifndef ABSL_USES_STD_STRING_VIEW
-#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
-  // Abseil's string_view implementation has bounds-checking in debug mode.
-  absl::string_view h = "hello";
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(h[5], "");
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(h[-1], "");
-#endif
-#endif
-}
-
-TEST(ComparisonOpsTest, StringCompareNotAmbiguous) {
-  EXPECT_EQ("hello", std::string("hello"));
-  EXPECT_LT("hello", std::string("world"));
-}
-
-TEST(ComparisonOpsTest, HeterogenousStringViewEquals) {
-  EXPECT_EQ(absl::string_view("hello"), std::string("hello"));
-  EXPECT_EQ("hello", absl::string_view("hello"));
-}
-
-TEST(FindOneCharTest, EdgeCases) {
-  absl::string_view a("xxyyyxx");
-
-  // Set a = "xyyyx".
-  a.remove_prefix(1);
-  a.remove_suffix(1);
-
-  EXPECT_EQ(0, a.find('x'));
-  EXPECT_EQ(0, a.find('x', 0));
-  EXPECT_EQ(4, a.find('x', 1));
-  EXPECT_EQ(4, a.find('x', 4));
-  EXPECT_EQ(absl::string_view::npos, a.find('x', 5));
-
-  EXPECT_EQ(4, a.rfind('x'));
-  EXPECT_EQ(4, a.rfind('x', 5));
-  EXPECT_EQ(4, a.rfind('x', 4));
-  EXPECT_EQ(0, a.rfind('x', 3));
-  EXPECT_EQ(0, a.rfind('x', 0));
-
-  // Set a = "yyy".
-  a.remove_prefix(1);
-  a.remove_suffix(1);
-
-  EXPECT_EQ(absl::string_view::npos, a.find('x'));
-  EXPECT_EQ(absl::string_view::npos, a.rfind('x'));
-}
-
-#ifndef ABSL_HAVE_THREAD_SANITIZER  // Allocates too much memory for tsan.
-TEST(HugeStringView, TwoPointTwoGB) {
-  if (sizeof(size_t) <= 4)
-    return;
-  // Try a huge string piece.
-  const size_t size = size_t{2200} * 1000 * 1000;
-  std::string s(size, 'a');
-  absl::string_view sp(s);
-  EXPECT_EQ(size, sp.length());
-  sp.remove_prefix(1);
-  EXPECT_EQ(size - 1, sp.length());
-  sp.remove_suffix(2);
-  EXPECT_EQ(size - 1 - 2, sp.length());
-}
-#endif  // ABSL_HAVE_THREAD_SANITIZER
-
-#if !defined(NDEBUG) && !defined(ABSL_USES_STD_STRING_VIEW)
-TEST(NonNegativeLenTest, NonNegativeLen) {
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(absl::string_view("xyz", -1),
-                                 "len <= kMaxSize");
-}
-
-TEST(LenExceedsMaxSizeTest, LenExceedsMaxSize) {
-  auto max_size = absl::string_view().max_size();
-
-  // This should construct ok (although the view itself is obviously invalid).
-  absl::string_view ok_view("", max_size);
-
-  // Adding one to the max should trigger an assertion.
-  ABSL_EXPECT_DEATH_IF_SUPPORTED(absl::string_view("", max_size + 1),
-                                 "len <= kMaxSize");
-}
-#endif  // !defined(NDEBUG) && !defined(ABSL_USES_STD_STRING_VIEW)
-
-class StringViewStreamTest : public ::testing::Test {
- public:
-  // Set negative 'width' for right justification.
-  template <typename T>
-  std::string Pad(const T& s, int width, char fill = 0) {
-    std::ostringstream oss;
-    if (fill != 0) {
-      oss << std::setfill(fill);
-    }
-    if (width < 0) {
-      width = -width;
-      oss << std::right;
-    }
-    oss << std::setw(width) << s;
-    return oss.str();
-  }
-};
-
-TEST_F(StringViewStreamTest, Padding) {
-  std::string s("hello");
-  absl::string_view sp(s);
-  for (int w = -64; w < 64; ++w) {
-    SCOPED_TRACE(w);
-    EXPECT_EQ(Pad(s, w), Pad(sp, w));
-  }
-  for (int w = -64; w < 64; ++w) {
-    SCOPED_TRACE(w);
-    EXPECT_EQ(Pad(s, w, '#'), Pad(sp, w, '#'));
-  }
-}
-
-TEST_F(StringViewStreamTest, ResetsWidth) {
-  // Width should reset after one formatted write.
-  // If we weren't resetting width after formatting the string_view,
-  // we'd have width=5 carrying over to the printing of the "]",
-  // creating "[###hi####]".
-  std::string s = "hi";
-  absl::string_view sp = s;
-  {
-    std::ostringstream oss;
-    oss << "[" << std::setfill('#') << std::setw(5) << s << "]";
-    ASSERT_EQ("[###hi]", oss.str());
-  }
-  {
-    std::ostringstream oss;
-    oss << "[" << std::setfill('#') << std::setw(5) << sp << "]";
-    EXPECT_EQ("[###hi]", oss.str());
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/strip.h b/third_party/abseil/absl/strings/strip.h
deleted file mode 100644
index 111872c..0000000
--- a/third_party/abseil/absl/strings/strip.h
+++ /dev/null
@@ -1,91 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: strip.h
-// -----------------------------------------------------------------------------
-//
-// This file contains various functions for stripping substrings from a string.
-#ifndef ABSL_STRINGS_STRIP_H_
-#define ABSL_STRINGS_STRIP_H_
-
-#include <cstddef>
-#include <string>
-
-#include "absl/base/macros.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/match.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// ConsumePrefix()
-//
-// Strips the `expected` prefix from the start of the given string, returning
-// `true` if the strip operation succeeded or false otherwise.
-//
-// Example:
-//
-//   absl::string_view input("abc");
-//   EXPECT_TRUE(absl::ConsumePrefix(&input, "a"));
-//   EXPECT_EQ(input, "bc");
-inline bool ConsumePrefix(absl::string_view* str, absl::string_view expected) {
-  if (!absl::StartsWith(*str, expected)) return false;
-  str->remove_prefix(expected.size());
-  return true;
-}
-// ConsumeSuffix()
-//
-// Strips the `expected` suffix from the end of the given string, returning
-// `true` if the strip operation succeeded or false otherwise.
-//
-// Example:
-//
-//   absl::string_view input("abcdef");
-//   EXPECT_TRUE(absl::ConsumeSuffix(&input, "def"));
-//   EXPECT_EQ(input, "abc");
-inline bool ConsumeSuffix(absl::string_view* str, absl::string_view expected) {
-  if (!absl::EndsWith(*str, expected)) return false;
-  str->remove_suffix(expected.size());
-  return true;
-}
-
-// StripPrefix()
-//
-// Returns a view into the input string 'str' with the given 'prefix' removed,
-// but leaving the original string intact. If the prefix does not match at the
-// start of the string, returns the original string instead.
-ABSL_MUST_USE_RESULT inline absl::string_view StripPrefix(
-    absl::string_view str, absl::string_view prefix) {
-  if (absl::StartsWith(str, prefix)) str.remove_prefix(prefix.size());
-  return str;
-}
-
-// StripSuffix()
-//
-// Returns a view into the input string 'str' with the given 'suffix' removed,
-// but leaving the original string intact. If the suffix does not match at the
-// end of the string, returns the original string instead.
-ABSL_MUST_USE_RESULT inline absl::string_view StripSuffix(
-    absl::string_view str, absl::string_view suffix) {
-  if (absl::EndsWith(str, suffix)) str.remove_suffix(suffix.size());
-  return str;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_STRIP_H_
diff --git a/third_party/abseil/absl/strings/strip_test.cc b/third_party/abseil/absl/strings/strip_test.cc
deleted file mode 100644
index e4e00cb..0000000
--- a/third_party/abseil/absl/strings/strip_test.cc
+++ /dev/null
@@ -1,198 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file contains functions that remove a defined part from the string,
-// i.e., strip the string.
-
-#include "absl/strings/strip.h"
-
-#include <cassert>
-#include <cstdio>
-#include <cstring>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/string_view.h"
-
-namespace {
-
-TEST(Strip, ConsumePrefixOneChar) {
-  absl::string_view input("abc");
-  EXPECT_TRUE(absl::ConsumePrefix(&input, "a"));
-  EXPECT_EQ(input, "bc");
-
-  EXPECT_FALSE(absl::ConsumePrefix(&input, "x"));
-  EXPECT_EQ(input, "bc");
-
-  EXPECT_TRUE(absl::ConsumePrefix(&input, "b"));
-  EXPECT_EQ(input, "c");
-
-  EXPECT_TRUE(absl::ConsumePrefix(&input, "c"));
-  EXPECT_EQ(input, "");
-
-  EXPECT_FALSE(absl::ConsumePrefix(&input, "a"));
-  EXPECT_EQ(input, "");
-}
-
-TEST(Strip, ConsumePrefix) {
-  absl::string_view input("abcdef");
-  EXPECT_FALSE(absl::ConsumePrefix(&input, "abcdefg"));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_FALSE(absl::ConsumePrefix(&input, "abce"));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_TRUE(absl::ConsumePrefix(&input, ""));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_FALSE(absl::ConsumePrefix(&input, "abcdeg"));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_TRUE(absl::ConsumePrefix(&input, "abcdef"));
-  EXPECT_EQ(input, "");
-
-  input = "abcdef";
-  EXPECT_TRUE(absl::ConsumePrefix(&input, "abcde"));
-  EXPECT_EQ(input, "f");
-}
-
-TEST(Strip, ConsumeSuffix) {
-  absl::string_view input("abcdef");
-  EXPECT_FALSE(absl::ConsumeSuffix(&input, "abcdefg"));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_TRUE(absl::ConsumeSuffix(&input, ""));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_TRUE(absl::ConsumeSuffix(&input, "def"));
-  EXPECT_EQ(input, "abc");
-
-  input = "abcdef";
-  EXPECT_FALSE(absl::ConsumeSuffix(&input, "abcdeg"));
-  EXPECT_EQ(input, "abcdef");
-
-  EXPECT_TRUE(absl::ConsumeSuffix(&input, "f"));
-  EXPECT_EQ(input, "abcde");
-
-  EXPECT_TRUE(absl::ConsumeSuffix(&input, "abcde"));
-  EXPECT_EQ(input, "");
-}
-
-TEST(Strip, StripPrefix) {
-  const absl::string_view null_str;
-
-  EXPECT_EQ(absl::StripPrefix("foobar", "foo"), "bar");
-  EXPECT_EQ(absl::StripPrefix("foobar", ""), "foobar");
-  EXPECT_EQ(absl::StripPrefix("foobar", null_str), "foobar");
-  EXPECT_EQ(absl::StripPrefix("foobar", "foobar"), "");
-  EXPECT_EQ(absl::StripPrefix("foobar", "bar"), "foobar");
-  EXPECT_EQ(absl::StripPrefix("foobar", "foobarr"), "foobar");
-  EXPECT_EQ(absl::StripPrefix("", ""), "");
-}
-
-TEST(Strip, StripSuffix) {
-  const absl::string_view null_str;
-
-  EXPECT_EQ(absl::StripSuffix("foobar", "bar"), "foo");
-  EXPECT_EQ(absl::StripSuffix("foobar", ""), "foobar");
-  EXPECT_EQ(absl::StripSuffix("foobar", null_str), "foobar");
-  EXPECT_EQ(absl::StripSuffix("foobar", "foobar"), "");
-  EXPECT_EQ(absl::StripSuffix("foobar", "foo"), "foobar");
-  EXPECT_EQ(absl::StripSuffix("foobar", "ffoobar"), "foobar");
-  EXPECT_EQ(absl::StripSuffix("", ""), "");
-}
-
-TEST(Strip, RemoveExtraAsciiWhitespace) {
-  const char* inputs[] = {
-      "No extra space",
-      "  Leading whitespace",
-      "Trailing whitespace  ",
-      "  Leading and trailing  ",
-      " Whitespace \t  in\v   middle  ",
-      "'Eeeeep!  \n Newlines!\n",
-      "nospaces",
-  };
-  const char* outputs[] = {
-      "No extra space",
-      "Leading whitespace",
-      "Trailing whitespace",
-      "Leading and trailing",
-      "Whitespace in middle",
-      "'Eeeeep! Newlines!",
-      "nospaces",
-  };
-  int NUM_TESTS = 7;
-
-  for (int i = 0; i < NUM_TESTS; i++) {
-    std::string s(inputs[i]);
-    absl::RemoveExtraAsciiWhitespace(&s);
-    EXPECT_STREQ(outputs[i], s.c_str());
-  }
-
-  // Test that absl::RemoveExtraAsciiWhitespace returns immediately for empty
-  // strings (It was adding the \0 character to the C++ std::string, which broke
-  // tests involving empty())
-  std::string zero_string = "";
-  assert(zero_string.empty());
-  absl::RemoveExtraAsciiWhitespace(&zero_string);
-  EXPECT_EQ(zero_string.size(), 0);
-  EXPECT_TRUE(zero_string.empty());
-}
-
-TEST(Strip, StripTrailingAsciiWhitespace) {
-  std::string test = "foo  ";
-  absl::StripTrailingAsciiWhitespace(&test);
-  EXPECT_EQ(test, "foo");
-
-  test = "   ";
-  absl::StripTrailingAsciiWhitespace(&test);
-  EXPECT_EQ(test, "");
-
-  test = "";
-  absl::StripTrailingAsciiWhitespace(&test);
-  EXPECT_EQ(test, "");
-
-  test = " abc\t";
-  absl::StripTrailingAsciiWhitespace(&test);
-  EXPECT_EQ(test, " abc");
-}
-
-TEST(String, StripLeadingAsciiWhitespace) {
-  absl::string_view orig = "\t  \n\f\r\n\vfoo";
-  EXPECT_EQ("foo", absl::StripLeadingAsciiWhitespace(orig));
-  orig = "\t  \n\f\r\v\n\t  \n\f\r\v\n";
-  EXPECT_EQ(absl::string_view(), absl::StripLeadingAsciiWhitespace(orig));
-}
-
-TEST(Strip, StripAsciiWhitespace) {
-  std::string test2 = "\t  \f\r\n\vfoo \t\f\r\v\n";
-  absl::StripAsciiWhitespace(&test2);
-  EXPECT_EQ(test2, "foo");
-  std::string test3 = "bar";
-  absl::StripAsciiWhitespace(&test3);
-  EXPECT_EQ(test3, "bar");
-  std::string test4 = "\t  \f\r\n\vfoo";
-  absl::StripAsciiWhitespace(&test4);
-  EXPECT_EQ(test4, "foo");
-  std::string test5 = "foo \t\f\r\v\n";
-  absl::StripAsciiWhitespace(&test5);
-  EXPECT_EQ(test5, "foo");
-  absl::string_view test6("\t  \f\r\n\vfoo \t\f\r\v\n");
-  test6 = absl::StripAsciiWhitespace(test6);
-  EXPECT_EQ(test6, "foo");
-  test6 = absl::StripAsciiWhitespace(test6);
-  EXPECT_EQ(test6, "foo");  // already stripped
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/strings/substitute.cc b/third_party/abseil/absl/strings/substitute.cc
deleted file mode 100644
index 1f3c740..0000000
--- a/third_party/abseil/absl/strings/substitute.cc
+++ /dev/null
@@ -1,171 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/substitute.h"
-
-#include <algorithm>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/escaping.h"
-#include "absl/strings/internal/resize_uninitialized.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace substitute_internal {
-
-void SubstituteAndAppendArray(std::string* output, absl::string_view format,
-                              const absl::string_view* args_array,
-                              size_t num_args) {
-  // Determine total size needed.
-  size_t size = 0;
-  for (size_t i = 0; i < format.size(); i++) {
-    if (format[i] == '$') {
-      if (i + 1 >= format.size()) {
-#ifndef NDEBUG
-        ABSL_RAW_LOG(FATAL,
-                     "Invalid absl::Substitute() format string: \"%s\".",
-                     absl::CEscape(format).c_str());
-#endif
-        return;
-      } else if (absl::ascii_isdigit(format[i + 1])) {
-        int index = format[i + 1] - '0';
-        if (static_cast<size_t>(index) >= num_args) {
-#ifndef NDEBUG
-          ABSL_RAW_LOG(
-              FATAL,
-              "Invalid absl::Substitute() format string: asked for \"$"
-              "%d\", but only %d args were given.  Full format string was: "
-              "\"%s\".",
-              index, static_cast<int>(num_args), absl::CEscape(format).c_str());
-#endif
-          return;
-        }
-        size += args_array[index].size();
-        ++i;  // Skip next char.
-      } else if (format[i + 1] == '$') {
-        ++size;
-        ++i;  // Skip next char.
-      } else {
-#ifndef NDEBUG
-        ABSL_RAW_LOG(FATAL,
-                     "Invalid absl::Substitute() format string: \"%s\".",
-                     absl::CEscape(format).c_str());
-#endif
-        return;
-      }
-    } else {
-      ++size;
-    }
-  }
-
-  if (size == 0) return;
-
-  // Build the string.
-  size_t original_size = output->size();
-  strings_internal::STLStringResizeUninitialized(output, original_size + size);
-  char* target = &(*output)[original_size];
-  for (size_t i = 0; i < format.size(); i++) {
-    if (format[i] == '$') {
-      if (absl::ascii_isdigit(format[i + 1])) {
-        const absl::string_view src = args_array[format[i + 1] - '0'];
-        target = std::copy(src.begin(), src.end(), target);
-        ++i;  // Skip next char.
-      } else if (format[i + 1] == '$') {
-        *target++ = '$';
-        ++i;  // Skip next char.
-      }
-    } else {
-      *target++ = format[i];
-    }
-  }
-
-  assert(target == output->data() + output->size());
-}
-
-Arg::Arg(const void* value) {
-  static_assert(sizeof(scratch_) >= sizeof(value) * 2 + 2,
-                "fix sizeof(scratch_)");
-  if (value == nullptr) {
-    piece_ = "NULL";
-  } else {
-    char* ptr = scratch_ + sizeof(scratch_);
-    uintptr_t num = reinterpret_cast<uintptr_t>(value);
-    do {
-      *--ptr = absl::numbers_internal::kHexChar[num & 0xf];
-      num >>= 4;
-    } while (num != 0);
-    *--ptr = 'x';
-    *--ptr = '0';
-    piece_ = absl::string_view(ptr, scratch_ + sizeof(scratch_) - ptr);
-  }
-}
-
-// TODO(jorg): Don't duplicate so much code between here and str_cat.cc
-Arg::Arg(Hex hex) {
-  char* const end = &scratch_[numbers_internal::kFastToBufferSize];
-  char* writer = end;
-  uint64_t value = hex.value;
-  do {
-    *--writer = absl::numbers_internal::kHexChar[value & 0xF];
-    value >>= 4;
-  } while (value != 0);
-
-  char* beg;
-  if (end - writer < hex.width) {
-    beg = end - hex.width;
-    std::fill_n(beg, writer - beg, hex.fill);
-  } else {
-    beg = writer;
-  }
-
-  piece_ = absl::string_view(beg, end - beg);
-}
-
-// TODO(jorg): Don't duplicate so much code between here and str_cat.cc
-Arg::Arg(Dec dec) {
-  assert(dec.width <= numbers_internal::kFastToBufferSize);
-  char* const end = &scratch_[numbers_internal::kFastToBufferSize];
-  char* const minfill = end - dec.width;
-  char* writer = end;
-  uint64_t value = dec.value;
-  bool neg = dec.neg;
-  while (value > 9) {
-    *--writer = '0' + (value % 10);
-    value /= 10;
-  }
-  *--writer = '0' + value;
-  if (neg) *--writer = '-';
-
-  ptrdiff_t fillers = writer - minfill;
-  if (fillers > 0) {
-    // Tricky: if the fill character is ' ', then it's <fill><+/-><digits>
-    // But...: if the fill character is '0', then it's <+/-><fill><digits>
-    bool add_sign_again = false;
-    if (neg && dec.fill == '0') {  // If filling with '0',
-      ++writer;                    // ignore the sign we just added
-      add_sign_again = true;       // and re-add the sign later.
-    }
-    writer -= fillers;
-    std::fill_n(writer, fillers, dec.fill);
-    if (add_sign_again) *--writer = '-';
-  }
-
-  piece_ = absl::string_view(writer, end - writer);
-}
-
-}  // namespace substitute_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/strings/substitute.h b/third_party/abseil/absl/strings/substitute.h
deleted file mode 100644
index c6da4dc..0000000
--- a/third_party/abseil/absl/strings/substitute.h
+++ /dev/null
@@ -1,696 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: substitute.h
-// -----------------------------------------------------------------------------
-//
-// This package contains functions for efficiently performing string
-// substitutions using a format string with positional notation:
-// `Substitute()` and `SubstituteAndAppend()`.
-//
-// Unlike printf-style format specifiers, `Substitute()` functions do not need
-// to specify the type of the substitution arguments. Supported arguments
-// following the format string, such as strings, string_views, ints,
-// floats, and bools, are automatically converted to strings during the
-// substitution process. (See below for a full list of supported types.)
-//
-// `Substitute()` does not allow you to specify *how* to format a value, beyond
-// the default conversion to string. For example, you cannot format an integer
-// in hex.
-//
-// The format string uses positional identifiers indicated by a dollar sign ($)
-// and single digit positional ids to indicate which substitution arguments to
-// use at that location within the format string.
-//
-// A '$$' sequence in the format string causes a literal '$' character to be
-// output.
-//
-// Example 1:
-//   std::string s = Substitute("$1 purchased $0 $2 for $$10. Thanks $1!",
-//                              5, "Bob", "Apples");
-//   EXPECT_EQ("Bob purchased 5 Apples for $10. Thanks Bob!", s);
-//
-// Example 2:
-//   std::string s = "Hi. ";
-//   SubstituteAndAppend(&s, "My name is $0 and I am $1 years old.", "Bob", 5);
-//   EXPECT_EQ("Hi. My name is Bob and I am 5 years old.", s);
-//
-// Supported types:
-//   * absl::string_view, std::string, const char* (null is equivalent to "")
-//   * int32_t, int64_t, uint32_t, uint64_t
-//   * float, double
-//   * bool (Printed as "true" or "false")
-//   * pointer types other than char* (Printed as "0x<lower case hex string>",
-//     except that null is printed as "NULL")
-//
-// If an invalid format string is provided, Substitute returns an empty string
-// and SubstituteAndAppend does not change the provided output string.
-// A format string is invalid if it:
-//   * ends in an unescaped $ character,
-//     e.g. "Hello $", or
-//   * calls for a position argument which is not provided,
-//     e.g. Substitute("Hello $2", "world"), or
-//   * specifies a non-digit, non-$ character after an unescaped $ character,
-//     e.g. "Hello $f".
-// In debug mode, i.e. #ifndef NDEBUG, such errors terminate the program.
-
-#ifndef ABSL_STRINGS_SUBSTITUTE_H_
-#define ABSL_STRINGS_SUBSTITUTE_H_
-
-#include <cstring>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/escaping.h"
-#include "absl/strings/numbers.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace substitute_internal {
-
-// Arg
-//
-// This class provides an argument type for `absl::Substitute()` and
-// `absl::SubstituteAndAppend()`. `Arg` handles implicit conversion of various
-// types to a string. (`Arg` is very similar to the `AlphaNum` class in
-// `StrCat()`.)
-//
-// This class has implicit constructors.
-class Arg {
- public:
-  // Overloads for string-y things
-  //
-  // Explicitly overload `const char*` so the compiler doesn't cast to `bool`.
-  Arg(const char* value)  // NOLINT(runtime/explicit)
-      : piece_(absl::NullSafeStringView(value)) {}
-  template <typename Allocator>
-  Arg(  // NOLINT
-      const std::basic_string<char, std::char_traits<char>, Allocator>&
-          value) noexcept
-      : piece_(value) {}
-  Arg(absl::string_view value)  // NOLINT(runtime/explicit)
-      : piece_(value) {}
-
-  // Overloads for primitives
-  //
-  // No overloads are available for signed and unsigned char because if people
-  // are explicitly declaring their chars as signed or unsigned then they are
-  // probably using them as 8-bit integers and would probably prefer an integer
-  // representation. However, we can't really know, so we make the caller decide
-  // what to do.
-  Arg(char value)  // NOLINT(runtime/explicit)
-      : piece_(scratch_, 1) {
-    scratch_[0] = value;
-  }
-  Arg(short value)  // NOLINT(*)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(unsigned short value)  // NOLINT(*)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(int value)  // NOLINT(runtime/explicit)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(unsigned int value)  // NOLINT(runtime/explicit)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(long value)  // NOLINT(*)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(unsigned long value)  // NOLINT(*)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(long long value)  // NOLINT(*)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(unsigned long long value)  // NOLINT(*)
-      : piece_(scratch_,
-               numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
-  Arg(float value)  // NOLINT(runtime/explicit)
-      : piece_(scratch_, numbers_internal::SixDigitsToBuffer(value, scratch_)) {
-  }
-  Arg(double value)  // NOLINT(runtime/explicit)
-      : piece_(scratch_, numbers_internal::SixDigitsToBuffer(value, scratch_)) {
-  }
-  Arg(bool value)  // NOLINT(runtime/explicit)
-      : piece_(value ? "true" : "false") {}
-
-  Arg(Hex hex);  // NOLINT(runtime/explicit)
-  Arg(Dec dec);  // NOLINT(runtime/explicit)
-
-  // vector<bool>::reference and const_reference require special help to
-  // convert to `AlphaNum` because it requires two user defined conversions.
-  template <typename T,
-            absl::enable_if_t<
-                std::is_class<T>::value &&
-                (std::is_same<T, std::vector<bool>::reference>::value ||
-                 std::is_same<T, std::vector<bool>::const_reference>::value)>* =
-                nullptr>
-  Arg(T value)  // NOLINT(google-explicit-constructor)
-      : Arg(static_cast<bool>(value)) {}
-
-  // `void*` values, with the exception of `char*`, are printed as
-  // "0x<hex value>". However, in the case of `nullptr`, "NULL" is printed.
-  Arg(const void* value);  // NOLINT(runtime/explicit)
-
-  Arg(const Arg&) = delete;
-  Arg& operator=(const Arg&) = delete;
-
-  absl::string_view piece() const { return piece_; }
-
- private:
-  absl::string_view piece_;
-  char scratch_[numbers_internal::kFastToBufferSize];
-};
-
-// Internal helper function. Don't call this from outside this implementation.
-// This interface may change without notice.
-void SubstituteAndAppendArray(std::string* output, absl::string_view format,
-                              const absl::string_view* args_array,
-                              size_t num_args);
-
-#if defined(ABSL_BAD_CALL_IF)
-constexpr int CalculateOneBit(const char* format) {
-  // Returns:
-  // * 2^N for '$N' when N is in [0-9]
-  // * 0 for correct '$' escaping: '$$'.
-  // * -1 otherwise.
-  return (*format < '0' || *format > '9') ? (*format == '$' ? 0 : -1)
-                                          : (1 << (*format - '0'));
-}
-
-constexpr const char* SkipNumber(const char* format) {
-  return !*format ? format : (format + 1);
-}
-
-constexpr int PlaceholderBitmask(const char* format) {
-  return !*format
-             ? 0
-             : *format != '$' ? PlaceholderBitmask(format + 1)
-                              : (CalculateOneBit(format + 1) |
-                                 PlaceholderBitmask(SkipNumber(format + 1)));
-}
-#endif  // ABSL_BAD_CALL_IF
-
-}  // namespace substitute_internal
-
-//
-// PUBLIC API
-//
-
-// SubstituteAndAppend()
-//
-// Substitutes variables into a given format string and appends to a given
-// output string. See file comments above for usage.
-//
-// The declarations of `SubstituteAndAppend()` below consist of overloads
-// for passing 0 to 10 arguments, respectively.
-//
-// NOTE: A zero-argument `SubstituteAndAppend()` may be used within variadic
-// templates to allow a variable number of arguments.
-//
-// Example:
-//  template <typename... Args>
-//  void VarMsg(std::string* boilerplate, absl::string_view format,
-//      const Args&... args) {
-//    absl::SubstituteAndAppend(boilerplate, format, args...);
-//  }
-//
-inline void SubstituteAndAppend(std::string* output, absl::string_view format) {
-  substitute_internal::SubstituteAndAppendArray(output, format, nullptr, 0);
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0) {
-  const absl::string_view args[] = {a0.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0,
-                                const substitute_internal::Arg& a1) {
-  const absl::string_view args[] = {a0.piece(), a1.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0,
-                                const substitute_internal::Arg& a1,
-                                const substitute_internal::Arg& a2) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0,
-                                const substitute_internal::Arg& a1,
-                                const substitute_internal::Arg& a2,
-                                const substitute_internal::Arg& a3) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(),
-                                    a3.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0,
-                                const substitute_internal::Arg& a1,
-                                const substitute_internal::Arg& a2,
-                                const substitute_internal::Arg& a3,
-                                const substitute_internal::Arg& a4) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(),
-                                    a3.piece(), a4.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0,
-                                const substitute_internal::Arg& a1,
-                                const substitute_internal::Arg& a2,
-                                const substitute_internal::Arg& a3,
-                                const substitute_internal::Arg& a4,
-                                const substitute_internal::Arg& a5) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(),
-                                    a3.piece(), a4.piece(), a5.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(std::string* output, absl::string_view format,
-                                const substitute_internal::Arg& a0,
-                                const substitute_internal::Arg& a1,
-                                const substitute_internal::Arg& a2,
-                                const substitute_internal::Arg& a3,
-                                const substitute_internal::Arg& a4,
-                                const substitute_internal::Arg& a5,
-                                const substitute_internal::Arg& a6) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(),
-                                    a3.piece(), a4.piece(), a5.piece(),
-                                    a6.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(
-    std::string* output, absl::string_view format,
-    const substitute_internal::Arg& a0, const substitute_internal::Arg& a1,
-    const substitute_internal::Arg& a2, const substitute_internal::Arg& a3,
-    const substitute_internal::Arg& a4, const substitute_internal::Arg& a5,
-    const substitute_internal::Arg& a6, const substitute_internal::Arg& a7) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(),
-                                    a3.piece(), a4.piece(), a5.piece(),
-                                    a6.piece(), a7.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(
-    std::string* output, absl::string_view format,
-    const substitute_internal::Arg& a0, const substitute_internal::Arg& a1,
-    const substitute_internal::Arg& a2, const substitute_internal::Arg& a3,
-    const substitute_internal::Arg& a4, const substitute_internal::Arg& a5,
-    const substitute_internal::Arg& a6, const substitute_internal::Arg& a7,
-    const substitute_internal::Arg& a8) {
-  const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(),
-                                    a3.piece(), a4.piece(), a5.piece(),
-                                    a6.piece(), a7.piece(), a8.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-inline void SubstituteAndAppend(
-    std::string* output, absl::string_view format,
-    const substitute_internal::Arg& a0, const substitute_internal::Arg& a1,
-    const substitute_internal::Arg& a2, const substitute_internal::Arg& a3,
-    const substitute_internal::Arg& a4, const substitute_internal::Arg& a5,
-    const substitute_internal::Arg& a6, const substitute_internal::Arg& a7,
-    const substitute_internal::Arg& a8, const substitute_internal::Arg& a9) {
-  const absl::string_view args[] = {
-      a0.piece(), a1.piece(), a2.piece(), a3.piece(), a4.piece(),
-      a5.piece(), a6.piece(), a7.piece(), a8.piece(), a9.piece()};
-  substitute_internal::SubstituteAndAppendArray(output, format, args,
-                                                ABSL_ARRAYSIZE(args));
-}
-
-#if defined(ABSL_BAD_CALL_IF)
-// This body of functions catches cases where the number of placeholders
-// doesn't match the number of data arguments.
-void SubstituteAndAppend(std::string* output, const char* format)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 0,
-                     "There were no substitution arguments "
-                     "but this format string has a $[0-9] in it");
-
-void SubstituteAndAppend(std::string* output, const char* format,
-                         const substitute_internal::Arg& a0)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1,
-                     "There was 1 substitution argument given, but "
-                     "this format string is either missing its $0, or "
-                     "contains one of $1-$9");
-
-void SubstituteAndAppend(std::string* output, const char* format,
-                         const substitute_internal::Arg& a0,
-                         const substitute_internal::Arg& a1)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 3,
-                     "There were 2 substitution arguments given, but "
-                     "this format string is either missing its $0/$1, or "
-                     "contains one of $2-$9");
-
-void SubstituteAndAppend(std::string* output, const char* format,
-                         const substitute_internal::Arg& a0,
-                         const substitute_internal::Arg& a1,
-                         const substitute_internal::Arg& a2)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 7,
-                     "There were 3 substitution arguments given, but "
-                     "this format string is either missing its $0/$1/$2, or "
-                     "contains one of $3-$9");
-
-void SubstituteAndAppend(std::string* output, const char* format,
-                         const substitute_internal::Arg& a0,
-                         const substitute_internal::Arg& a1,
-                         const substitute_internal::Arg& a2,
-                         const substitute_internal::Arg& a3)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 15,
-                     "There were 4 substitution arguments given, but "
-                     "this format string is either missing its $0-$3, or "
-                     "contains one of $4-$9");
-
-void SubstituteAndAppend(std::string* output, const char* format,
-                         const substitute_internal::Arg& a0,
-                         const substitute_internal::Arg& a1,
-                         const substitute_internal::Arg& a2,
-                         const substitute_internal::Arg& a3,
-                         const substitute_internal::Arg& a4)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 31,
-                     "There were 5 substitution arguments given, but "
-                     "this format string is either missing its $0-$4, or "
-                     "contains one of $5-$9");
-
-void SubstituteAndAppend(std::string* output, const char* format,
-                         const substitute_internal::Arg& a0,
-                         const substitute_internal::Arg& a1,
-                         const substitute_internal::Arg& a2,
-                         const substitute_internal::Arg& a3,
-                         const substitute_internal::Arg& a4,
-                         const substitute_internal::Arg& a5)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 63,
-                     "There were 6 substitution arguments given, but "
-                     "this format string is either missing its $0-$5, or "
-                     "contains one of $6-$9");
-
-void SubstituteAndAppend(
-    std::string* output, const char* format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 127,
-                     "There were 7 substitution arguments given, but "
-                     "this format string is either missing its $0-$6, or "
-                     "contains one of $7-$9");
-
-void SubstituteAndAppend(
-    std::string* output, const char* format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 255,
-                     "There were 8 substitution arguments given, but "
-                     "this format string is either missing its $0-$7, or "
-                     "contains one of $8-$9");
-
-void SubstituteAndAppend(
-    std::string* output, const char* format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7, const substitute_internal::Arg& a8)
-    ABSL_BAD_CALL_IF(
-        substitute_internal::PlaceholderBitmask(format) != 511,
-        "There were 9 substitution arguments given, but "
-        "this format string is either missing its $0-$8, or contains a $9");
-
-void SubstituteAndAppend(
-    std::string* output, const char* format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7, const substitute_internal::Arg& a8,
-    const substitute_internal::Arg& a9)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1023,
-                     "There were 10 substitution arguments given, but this "
-                     "format string doesn't contain all of $0 through $9");
-#endif  // ABSL_BAD_CALL_IF
-
-// Substitute()
-//
-// Substitutes variables into a given format string. See file comments above
-// for usage.
-//
-// The declarations of `Substitute()` below consist of overloads for passing 0
-// to 10 arguments, respectively.
-//
-// NOTE: A zero-argument `Substitute()` may be used within variadic templates to
-// allow a variable number of arguments.
-//
-// Example:
-//  template <typename... Args>
-//  void VarMsg(absl::string_view format, const Args&... args) {
-//    std::string s = absl::Substitute(format, args...);
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(absl::string_view format) {
-  std::string result;
-  SubstituteAndAppend(&result, format);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6, a7);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7, const substitute_internal::Arg& a8) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6, a7, a8);
-  return result;
-}
-
-ABSL_MUST_USE_RESULT inline std::string Substitute(
-    absl::string_view format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7, const substitute_internal::Arg& a8,
-    const substitute_internal::Arg& a9) {
-  std::string result;
-  SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9);
-  return result;
-}
-
-#if defined(ABSL_BAD_CALL_IF)
-// This body of functions catches cases where the number of placeholders
-// doesn't match the number of data arguments.
-std::string Substitute(const char* format)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 0,
-                     "There were no substitution arguments "
-                     "but this format string has a $[0-9] in it");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1,
-                     "There was 1 substitution argument given, but "
-                     "this format string is either missing its $0, or "
-                     "contains one of $1-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 3,
-                     "There were 2 substitution arguments given, but "
-                     "this format string is either missing its $0/$1, or "
-                     "contains one of $2-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1,
-                       const substitute_internal::Arg& a2)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 7,
-                     "There were 3 substitution arguments given, but "
-                     "this format string is either missing its $0/$1/$2, or "
-                     "contains one of $3-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1,
-                       const substitute_internal::Arg& a2,
-                       const substitute_internal::Arg& a3)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 15,
-                     "There were 4 substitution arguments given, but "
-                     "this format string is either missing its $0-$3, or "
-                     "contains one of $4-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1,
-                       const substitute_internal::Arg& a2,
-                       const substitute_internal::Arg& a3,
-                       const substitute_internal::Arg& a4)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 31,
-                     "There were 5 substitution arguments given, but "
-                     "this format string is either missing its $0-$4, or "
-                     "contains one of $5-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1,
-                       const substitute_internal::Arg& a2,
-                       const substitute_internal::Arg& a3,
-                       const substitute_internal::Arg& a4,
-                       const substitute_internal::Arg& a5)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 63,
-                     "There were 6 substitution arguments given, but "
-                     "this format string is either missing its $0-$5, or "
-                     "contains one of $6-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1,
-                       const substitute_internal::Arg& a2,
-                       const substitute_internal::Arg& a3,
-                       const substitute_internal::Arg& a4,
-                       const substitute_internal::Arg& a5,
-                       const substitute_internal::Arg& a6)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 127,
-                     "There were 7 substitution arguments given, but "
-                     "this format string is either missing its $0-$6, or "
-                     "contains one of $7-$9");
-
-std::string Substitute(const char* format, const substitute_internal::Arg& a0,
-                       const substitute_internal::Arg& a1,
-                       const substitute_internal::Arg& a2,
-                       const substitute_internal::Arg& a3,
-                       const substitute_internal::Arg& a4,
-                       const substitute_internal::Arg& a5,
-                       const substitute_internal::Arg& a6,
-                       const substitute_internal::Arg& a7)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 255,
-                     "There were 8 substitution arguments given, but "
-                     "this format string is either missing its $0-$7, or "
-                     "contains one of $8-$9");
-
-std::string Substitute(
-    const char* format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7, const substitute_internal::Arg& a8)
-    ABSL_BAD_CALL_IF(
-        substitute_internal::PlaceholderBitmask(format) != 511,
-        "There were 9 substitution arguments given, but "
-        "this format string is either missing its $0-$8, or contains a $9");
-
-std::string Substitute(
-    const char* format, const substitute_internal::Arg& a0,
-    const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
-    const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
-    const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
-    const substitute_internal::Arg& a7, const substitute_internal::Arg& a8,
-    const substitute_internal::Arg& a9)
-    ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1023,
-                     "There were 10 substitution arguments given, but this "
-                     "format string doesn't contain all of $0 through $9");
-#endif  // ABSL_BAD_CALL_IF
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_SUBSTITUTE_H_
diff --git a/third_party/abseil/absl/strings/substitute_test.cc b/third_party/abseil/absl/strings/substitute_test.cc
deleted file mode 100644
index 442c921..0000000
--- a/third_party/abseil/absl/strings/substitute_test.cc
+++ /dev/null
@@ -1,204 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/strings/substitute.h"
-
-#include <cstdint>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-TEST(SubstituteTest, Substitute) {
-  // Basic.
-  EXPECT_EQ("Hello, world!", absl::Substitute("$0, $1!", "Hello", "world"));
-
-  // Non-char* types.
-  EXPECT_EQ("123 0.2 0.1 foo true false x",
-            absl::Substitute("$0 $1 $2 $3 $4 $5 $6", 123, 0.2, 0.1f,
-                             std::string("foo"), true, false, 'x'));
-
-  // All int types.
-  EXPECT_EQ(
-      "-32767 65535 "
-      "-1234567890 3234567890 "
-      "-1234567890 3234567890 "
-      "-1234567890123456789 9234567890123456789",
-      absl::Substitute(
-          "$0 $1 $2 $3 $4 $5 $6 $7",
-          static_cast<short>(-32767),          // NOLINT(runtime/int)
-          static_cast<unsigned short>(65535),  // NOLINT(runtime/int)
-          -1234567890, 3234567890U, -1234567890L, 3234567890UL,
-          -int64_t{1234567890123456789}, uint64_t{9234567890123456789u}));
-
-  // Hex format
-  EXPECT_EQ("0 1 f ffff0ffff 0123456789abcdef",
-            absl::Substitute("$0$1$2$3$4 $5",  //
-                             absl::Hex(0), absl::Hex(1, absl::kSpacePad2),
-                             absl::Hex(0xf, absl::kSpacePad2),
-                             absl::Hex(int16_t{-1}, absl::kSpacePad5),
-                             absl::Hex(int16_t{-1}, absl::kZeroPad5),
-                             absl::Hex(0x123456789abcdef, absl::kZeroPad16)));
-
-  // Dec format
-  EXPECT_EQ("0 115   -1-0001 81985529216486895",
-            absl::Substitute("$0$1$2$3$4 $5",  //
-                             absl::Dec(0), absl::Dec(1, absl::kSpacePad2),
-                             absl::Dec(0xf, absl::kSpacePad2),
-                             absl::Dec(int16_t{-1}, absl::kSpacePad5),
-                             absl::Dec(int16_t{-1}, absl::kZeroPad5),
-                             absl::Dec(0x123456789abcdef, absl::kZeroPad16)));
-
-  // Pointer.
-  const int* int_p = reinterpret_cast<const int*>(0x12345);
-  std::string str = absl::Substitute("$0", int_p);
-  EXPECT_EQ(absl::StrCat("0x", absl::Hex(int_p)), str);
-
-  // Volatile Pointer.
-  // Like C++ streamed I/O, such pointers implicitly become bool
-  volatile int vol = 237;
-  volatile int *volatile volptr = &vol;
-  str = absl::Substitute("$0", volptr);
-  EXPECT_EQ("true", str);
-
-  // null is special. StrCat prints 0x0. Substitute prints NULL.
-  const uint64_t* null_p = nullptr;
-  str = absl::Substitute("$0", null_p);
-  EXPECT_EQ("NULL", str);
-
-  // char* is also special.
-  const char* char_p = "print me";
-  str = absl::Substitute("$0", char_p);
-  EXPECT_EQ("print me", str);
-
-  char char_buf[16];
-  strncpy(char_buf, "print me too", sizeof(char_buf));
-  str = absl::Substitute("$0", char_buf);
-  EXPECT_EQ("print me too", str);
-
-  // null char* is "doubly" special. Represented as the empty string.
-  char_p = nullptr;
-  str = absl::Substitute("$0", char_p);
-  EXPECT_EQ("", str);
-
-  // Out-of-order.
-  EXPECT_EQ("b, a, c, b", absl::Substitute("$1, $0, $2, $1", "a", "b", "c"));
-
-  // Literal $
-  EXPECT_EQ("$", absl::Substitute("$$"));
-
-  EXPECT_EQ("$1", absl::Substitute("$$1"));
-
-  // Test all overloads.
-  EXPECT_EQ("a", absl::Substitute("$0", "a"));
-  EXPECT_EQ("a b", absl::Substitute("$0 $1", "a", "b"));
-  EXPECT_EQ("a b c", absl::Substitute("$0 $1 $2", "a", "b", "c"));
-  EXPECT_EQ("a b c d", absl::Substitute("$0 $1 $2 $3", "a", "b", "c", "d"));
-  EXPECT_EQ("a b c d e",
-            absl::Substitute("$0 $1 $2 $3 $4", "a", "b", "c", "d", "e"));
-  EXPECT_EQ("a b c d e f", absl::Substitute("$0 $1 $2 $3 $4 $5", "a", "b", "c",
-                                            "d", "e", "f"));
-  EXPECT_EQ("a b c d e f g", absl::Substitute("$0 $1 $2 $3 $4 $5 $6", "a", "b",
-                                              "c", "d", "e", "f", "g"));
-  EXPECT_EQ("a b c d e f g h",
-            absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7", "a", "b", "c", "d", "e",
-                             "f", "g", "h"));
-  EXPECT_EQ("a b c d e f g h i",
-            absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8", "a", "b", "c", "d",
-                             "e", "f", "g", "h", "i"));
-  EXPECT_EQ("a b c d e f g h i j",
-            absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b", "c",
-                             "d", "e", "f", "g", "h", "i", "j"));
-  EXPECT_EQ("a b c d e f g h i j b0",
-            absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8 $9 $10", "a", "b", "c",
-                             "d", "e", "f", "g", "h", "i", "j"));
-
-  const char* null_cstring = nullptr;
-  EXPECT_EQ("Text: ''", absl::Substitute("Text: '$0'", null_cstring));
-}
-
-TEST(SubstituteTest, SubstituteAndAppend) {
-  std::string str = "Hello";
-  absl::SubstituteAndAppend(&str, ", $0!", "world");
-  EXPECT_EQ("Hello, world!", str);
-
-  // Test all overloads.
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0", "a");
-  EXPECT_EQ("a", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1", "a", "b");
-  EXPECT_EQ("a b", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2", "a", "b", "c");
-  EXPECT_EQ("a b c", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3", "a", "b", "c", "d");
-  EXPECT_EQ("a b c d", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4", "a", "b", "c", "d", "e");
-  EXPECT_EQ("a b c d e", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5", "a", "b", "c", "d", "e",
-                            "f");
-  EXPECT_EQ("a b c d e f", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6", "a", "b", "c", "d",
-                            "e", "f", "g");
-  EXPECT_EQ("a b c d e f g", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7", "a", "b", "c", "d",
-                            "e", "f", "g", "h");
-  EXPECT_EQ("a b c d e f g h", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8", "a", "b", "c",
-                            "d", "e", "f", "g", "h", "i");
-  EXPECT_EQ("a b c d e f g h i", str);
-  str.clear();
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b",
-                            "c", "d", "e", "f", "g", "h", "i", "j");
-  EXPECT_EQ("a b c d e f g h i j", str);
-}
-
-TEST(SubstituteTest, VectorBoolRef) {
-  std::vector<bool> v = {true, false};
-  const auto& cv = v;
-  EXPECT_EQ("true false true false",
-            absl::Substitute("$0 $1 $2 $3", v[0], v[1], cv[0], cv[1]));
-
-  std::string str = "Logic be like: ";
-  absl::SubstituteAndAppend(&str, "$0 $1 $2 $3", v[0], v[1], cv[0], cv[1]);
-  EXPECT_EQ("Logic be like: true false true false", str);
-}
-
-#ifdef GTEST_HAS_DEATH_TEST
-
-TEST(SubstituteDeathTest, SubstituteDeath) {
-  EXPECT_DEBUG_DEATH(
-      static_cast<void>(absl::Substitute(absl::string_view("-$2"), "a", "b")),
-      "Invalid absl::Substitute\\(\\) format string: asked for \"\\$2\", "
-      "but only 2 args were given.");
-  EXPECT_DEBUG_DEATH(
-      static_cast<void>(absl::Substitute(absl::string_view("-$z-"))),
-      "Invalid absl::Substitute\\(\\) format string: \"-\\$z-\"");
-  EXPECT_DEBUG_DEATH(
-      static_cast<void>(absl::Substitute(absl::string_view("-$"))),
-      "Invalid absl::Substitute\\(\\) format string: \"-\\$\"");
-}
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace
diff --git a/third_party/abseil/absl/synchronization/BUILD.bazel b/third_party/abseil/absl/synchronization/BUILD.bazel
deleted file mode 100644
index cd4009a..0000000
--- a/third_party/abseil/absl/synchronization/BUILD.bazel
+++ /dev/null
@@ -1,288 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-# Internal data structure for efficiently detecting mutex dependency cycles
-cc_library(
-    name = "graphcycles_internal",
-    srcs = [
-        "internal/graphcycles.cc",
-    ],
-    hdrs = [
-        "internal/graphcycles.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        "//absl/base",
-        "//absl/base:base_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:malloc_internal",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "kernel_timeout_internal",
-    hdrs = ["internal/kernel_timeout.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/synchronization:__pkg__",
-    ],
-    deps = [
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/time",
-    ],
-)
-
-cc_library(
-    name = "synchronization",
-    srcs = [
-        "barrier.cc",
-        "blocking_counter.cc",
-        "internal/create_thread_identity.cc",
-        "internal/per_thread_sem.cc",
-        "internal/waiter.cc",
-        "mutex.cc",
-        "notification.cc",
-    ],
-    hdrs = [
-        "barrier.h",
-        "blocking_counter.h",
-        "internal/create_thread_identity.h",
-        "internal/futex.h",
-        "internal/per_thread_sem.h",
-        "internal/waiter.h",
-        "mutex.h",
-        "notification.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = select({
-        "//absl:windows": [],
-        "//absl:wasm": [],
-        "//conditions:default": ["-pthread"],
-    }) + ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":graphcycles_internal",
-        ":kernel_timeout_internal",
-        "//absl/base",
-        "//absl/base:atomic_hook",
-        "//absl/base:base_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:dynamic_annotations",
-        "//absl/base:malloc_internal",
-        "//absl/base:raw_logging_internal",
-        "//absl/debugging:stacktrace",
-        "//absl/debugging:symbolize",
-        "//absl/time",
-    ],
-)
-
-cc_test(
-    name = "barrier_test",
-    size = "small",
-    srcs = ["barrier_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":synchronization",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "blocking_counter_test",
-    size = "small",
-    srcs = ["blocking_counter_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":synchronization",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "graphcycles_test",
-    size = "medium",
-    srcs = ["internal/graphcycles_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":graphcycles_internal",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "graphcycles_benchmark",
-    srcs = ["internal/graphcycles_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = [
-        "benchmark",
-    ],
-    deps = [
-        ":graphcycles_internal",
-        "//absl/base:raw_logging_internal",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_library(
-    name = "thread_pool",
-    testonly = 1,
-    hdrs = ["internal/thread_pool.h"],
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl:__subpackages__",
-    ],
-    deps = [
-        ":synchronization",
-        "//absl/base:core_headers",
-    ],
-)
-
-cc_test(
-    name = "mutex_test",
-    size = "large",
-    srcs = ["mutex_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    shard_count = 25,
-    deps = [
-        ":synchronization",
-        ":thread_pool",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/memory",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "mutex_benchmark_common",
-    testonly = 1,
-    srcs = ["mutex_benchmark.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/synchronization:__pkg__",
-    ],
-    deps = [
-        ":synchronization",
-        ":thread_pool",
-        "//absl/base",
-        "//absl/base:config",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-    alwayslink = 1,
-)
-
-cc_binary(
-    name = "mutex_benchmark",
-    testonly = 1,
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        ":mutex_benchmark_common",
-    ],
-)
-
-cc_test(
-    name = "notification_test",
-    size = "small",
-    srcs = ["notification_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":synchronization",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "per_thread_sem_test_common",
-    testonly = 1,
-    srcs = ["internal/per_thread_sem_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":synchronization",
-        "//absl/base",
-        "//absl/base:config",
-        "//absl/strings",
-        "//absl/time",
-        "@com_google_googletest//:gtest",
-    ],
-    alwayslink = 1,
-)
-
-cc_test(
-    name = "per_thread_sem_test",
-    size = "medium",
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":per_thread_sem_test_common",
-        ":synchronization",
-        "//absl/strings",
-        "//absl/time",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "lifetime_test",
-    srcs = [
-        "lifetime_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["no_test_ios_x86_64"],
-    deps = [
-        ":synchronization",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-    ],
-)
diff --git a/third_party/abseil/absl/synchronization/CMakeLists.txt b/third_party/abseil/absl/synchronization/CMakeLists.txt
deleted file mode 100644
index e633d0b..0000000
--- a/third_party/abseil/absl/synchronization/CMakeLists.txt
+++ /dev/null
@@ -1,216 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    graphcycles_internal
-  HDRS
-    "internal/graphcycles.h"
-  SRCS
-    "internal/graphcycles.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::malloc_internal
-    absl::raw_logging_internal
-)
-
-absl_cc_library(
-  NAME
-    kernel_timeout_internal
-  HDRS
-    "internal/kernel_timeout.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::core_headers
-    absl::raw_logging_internal
-    absl::time
-)
-
-absl_cc_library(
-  NAME
-    synchronization
-  HDRS
-    "barrier.h"
-    "blocking_counter.h"
-    "internal/create_thread_identity.h"
-    "internal/futex.h"
-    "internal/per_thread_sem.h"
-    "internal/waiter.h"
-    "mutex.h"
-    "notification.h"
-  SRCS
-    "barrier.cc"
-    "blocking_counter.cc"
-    "internal/create_thread_identity.cc"
-    "internal/per_thread_sem.cc"
-    "internal/waiter.cc"
-    "notification.cc"
-    "mutex.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::graphcycles_internal
-    absl::kernel_timeout_internal
-    absl::atomic_hook
-    absl::base
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::dynamic_annotations
-    absl::malloc_internal
-    absl::raw_logging_internal
-    absl::stacktrace
-    absl::symbolize
-    absl::time
-    Threads::Threads
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    barrier_test
-  SRCS
-    "barrier_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::synchronization
-    absl::time
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    blocking_counter_test
-  SRCS
-    "blocking_counter_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::synchronization
-    absl::time
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    graphcycles_test
-  SRCS
-    "internal/graphcycles_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::graphcycles_internal
-    absl::core_headers
-    absl::raw_logging_internal
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    thread_pool
-  HDRS
-    "internal/thread_pool.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::synchronization
-    absl::core_headers
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    mutex_test
-  SRCS
-    "mutex_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::synchronization
-    absl::thread_pool
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::memory
-    absl::raw_logging_internal
-    absl::time
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    notification_test
-  SRCS
-    "notification_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::synchronization
-    absl::time
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    per_thread_sem_test_common
-  SRCS
-    "internal/per_thread_sem_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::synchronization
-    absl::base
-    absl::config
-    absl::strings
-    absl::time
-    gmock
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    per_thread_sem_test
-  SRCS
-    "internal/per_thread_sem_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::per_thread_sem_test_common
-    absl::synchronization
-    absl::strings
-    absl::time
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    lifetime_test
-  SRCS
-    "lifetime_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::synchronization
-    absl::core_headers
-    absl::raw_logging_internal
-)
diff --git a/third_party/abseil/absl/synchronization/barrier.cc b/third_party/abseil/absl/synchronization/barrier.cc
deleted file mode 100644
index 0dfd795..0000000
--- a/third_party/abseil/absl/synchronization/barrier.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/barrier.h"
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Return whether int *arg is zero.
-static bool IsZero(void *arg) {
-  return 0 == *reinterpret_cast<int *>(arg);
-}
-
-bool Barrier::Block() {
-  MutexLock l(&this->lock_);
-
-  this->num_to_block_--;
-  if (this->num_to_block_ < 0) {
-    ABSL_RAW_LOG(
-        FATAL,
-        "Block() called too many times.  num_to_block_=%d out of total=%d",
-        this->num_to_block_, this->num_to_exit_);
-  }
-
-  this->lock_.Await(Condition(IsZero, &this->num_to_block_));
-
-  // Determine which thread can safely delete this Barrier object
-  this->num_to_exit_--;
-  ABSL_RAW_CHECK(this->num_to_exit_ >= 0, "barrier underflow");
-
-  // If num_to_exit_ == 0 then all other threads in the barrier have
-  // exited the Wait() and have released the Mutex so this thread is
-  // free to delete the barrier.
-  return this->num_to_exit_ == 0;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/barrier.h b/third_party/abseil/absl/synchronization/barrier.h
deleted file mode 100644
index d8e7544..0000000
--- a/third_party/abseil/absl/synchronization/barrier.h
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// barrier.h
-// -----------------------------------------------------------------------------
-
-#ifndef ABSL_SYNCHRONIZATION_BARRIER_H_
-#define ABSL_SYNCHRONIZATION_BARRIER_H_
-
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Barrier
-//
-// This class creates a barrier which blocks threads until a prespecified
-// threshold of threads (`num_threads`) utilizes the barrier. A thread utilizes
-// the `Barrier` by calling `Block()` on the barrier, which will block that
-// thread; no call to `Block()` will return until `num_threads` threads have
-// called it.
-//
-// Exactly one call to `Block()` will return `true`, which is then responsible
-// for destroying the barrier; because stack allocation will cause the barrier
-// to be deleted when it is out of scope, barriers should not be stack
-// allocated.
-//
-// Example:
-//
-//   // Main thread creates a `Barrier`:
-//   barrier = new Barrier(num_threads);
-//
-//   // Each participating thread could then call:
-//   if (barrier->Block()) delete barrier;  // Exactly one call to `Block()`
-//                                          // returns `true`; that call
-//                                          // deletes the barrier.
-class Barrier {
- public:
-  // `num_threads` is the number of threads that will participate in the barrier
-  explicit Barrier(int num_threads)
-      : num_to_block_(num_threads), num_to_exit_(num_threads) {}
-
-  Barrier(const Barrier&) = delete;
-  Barrier& operator=(const Barrier&) = delete;
-
-  // Barrier::Block()
-  //
-  // Blocks the current thread, and returns only when the `num_threads`
-  // threshold of threads utilizing this barrier has been reached. `Block()`
-  // returns `true` for precisely one caller, which may then destroy the
-  // barrier.
-  //
-  // Memory ordering: For any threads X and Y, any action taken by X
-  // before X calls `Block()` will be visible to Y after Y returns from
-  // `Block()`.
-  bool Block();
-
- private:
-  Mutex lock_;
-  int num_to_block_ ABSL_GUARDED_BY(lock_);
-  int num_to_exit_ ABSL_GUARDED_BY(lock_);
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_SYNCHRONIZATION_BARRIER_H_
diff --git a/third_party/abseil/absl/synchronization/barrier_test.cc b/third_party/abseil/absl/synchronization/barrier_test.cc
deleted file mode 100644
index bfc6cb1..0000000
--- a/third_party/abseil/absl/synchronization/barrier_test.cc
+++ /dev/null
@@ -1,75 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/barrier.h"
-
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/time/clock.h"
-
-
-TEST(Barrier, SanityTest) {
-  constexpr int kNumThreads = 10;
-  absl::Barrier* barrier = new absl::Barrier(kNumThreads);
-
-  absl::Mutex mutex;
-  int counter = 0;  // Guarded by mutex.
-
-  auto thread_func = [&] {
-    if (barrier->Block()) {
-      // This thread is the last thread to reach the barrier so it is
-      // responsible for deleting it.
-      delete barrier;
-    }
-
-    // Increment the counter.
-    absl::MutexLock lock(&mutex);
-    ++counter;
-  };
-
-  // Start (kNumThreads - 1) threads running thread_func.
-  std::vector<std::thread> threads;
-  for (int i = 0; i < kNumThreads - 1; ++i) {
-    threads.push_back(std::thread(thread_func));
-  }
-
-  // Give (kNumThreads - 1) threads a chance to reach the barrier.
-  // This test assumes at least one thread will have run after the
-  // sleep has elapsed. Sleeping in a test is usually bad form, but we
-  // need to make sure that we are testing the barrier instead of some
-  // other synchronization method.
-  absl::SleepFor(absl::Seconds(1));
-
-  // The counter should still be zero since no thread should have
-  // been able to pass the barrier yet.
-  {
-    absl::MutexLock lock(&mutex);
-    EXPECT_EQ(counter, 0);
-  }
-
-  // Start 1 more thread. This should make all threads pass the barrier.
-  threads.push_back(std::thread(thread_func));
-
-  // All threads should now be able to proceed and finish.
-  for (auto& thread : threads) {
-    thread.join();
-  }
-
-  // All threads should now have incremented the counter.
-  absl::MutexLock lock(&mutex);
-  EXPECT_EQ(counter, kNumThreads);
-}
diff --git a/third_party/abseil/absl/synchronization/blocking_counter.cc b/third_party/abseil/absl/synchronization/blocking_counter.cc
deleted file mode 100644
index 3cea7ae..0000000
--- a/third_party/abseil/absl/synchronization/blocking_counter.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/blocking_counter.h"
-
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Return whether int *arg is zero.
-static bool IsZero(void *arg) {
-  return 0 == *reinterpret_cast<int *>(arg);
-}
-
-bool BlockingCounter::DecrementCount() {
-  MutexLock l(&lock_);
-  count_--;
-  if (count_ < 0) {
-    ABSL_RAW_LOG(
-        FATAL,
-        "BlockingCounter::DecrementCount() called too many times.  count=%d",
-        count_);
-  }
-  return count_ == 0;
-}
-
-void BlockingCounter::Wait() {
-  MutexLock l(&this->lock_);
-  ABSL_RAW_CHECK(count_ >= 0, "BlockingCounter underflow");
-
-  // only one thread may call Wait(). To support more than one thread,
-  // implement a counter num_to_exit, like in the Barrier class.
-  ABSL_RAW_CHECK(num_waiting_ == 0, "multiple threads called Wait()");
-  num_waiting_++;
-
-  this->lock_.Await(Condition(IsZero, &this->count_));
-
-  // At this point, We know that all threads executing DecrementCount have
-  // released the lock, and so will not touch this object again.
-  // Therefore, the thread calling this method is free to delete the object
-  // after we return from this method.
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/blocking_counter.h b/third_party/abseil/absl/synchronization/blocking_counter.h
deleted file mode 100644
index 1f53f9f..0000000
--- a/third_party/abseil/absl/synchronization/blocking_counter.h
+++ /dev/null
@@ -1,99 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// blocking_counter.h
-// -----------------------------------------------------------------------------
-
-#ifndef ABSL_SYNCHRONIZATION_BLOCKING_COUNTER_H_
-#define ABSL_SYNCHRONIZATION_BLOCKING_COUNTER_H_
-
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// BlockingCounter
-//
-// This class allows a thread to block for a pre-specified number of actions.
-// `BlockingCounter` maintains a single non-negative abstract integer "count"
-// with an initial value `initial_count`. A thread can then call `Wait()` on
-// this blocking counter to block until the specified number of events occur;
-// worker threads then call 'DecrementCount()` on the counter upon completion of
-// their work. Once the counter's internal "count" reaches zero, the blocked
-// thread unblocks.
-//
-// A `BlockingCounter` requires the following:
-//     - its `initial_count` is non-negative.
-//     - the number of calls to `DecrementCount()` on it is at most
-//       `initial_count`.
-//     - `Wait()` is called at most once on it.
-//
-// Given the above requirements, a `BlockingCounter` provides the following
-// guarantees:
-//     - Once its internal "count" reaches zero, no legal action on the object
-//       can further change the value of "count".
-//     - When `Wait()` returns, it is legal to destroy the `BlockingCounter`.
-//     - When `Wait()` returns, the number of calls to `DecrementCount()` on
-//       this blocking counter exactly equals `initial_count`.
-//
-// Example:
-//     BlockingCounter bcount(N);         // there are N items of work
-//     ... Allow worker threads to start.
-//     ... On completing each work item, workers do:
-//     ... bcount.DecrementCount();      // an item of work has been completed
-//
-//     bcount.Wait();                    // wait for all work to be complete
-//
-class BlockingCounter {
- public:
-  explicit BlockingCounter(int initial_count)
-      : count_(initial_count), num_waiting_(0) {}
-
-  BlockingCounter(const BlockingCounter&) = delete;
-  BlockingCounter& operator=(const BlockingCounter&) = delete;
-
-  // BlockingCounter::DecrementCount()
-  //
-  // Decrements the counter's "count" by one, and return "count == 0". This
-  // function requires that "count != 0" when it is called.
-  //
-  // Memory ordering: For any threads X and Y, any action taken by X
-  // before it calls `DecrementCount()` is visible to thread Y after
-  // Y's call to `DecrementCount()`, provided Y's call returns `true`.
-  bool DecrementCount();
-
-  // BlockingCounter::Wait()
-  //
-  // Blocks until the counter reaches zero. This function may be called at most
-  // once. On return, `DecrementCount()` will have been called "initial_count"
-  // times and the blocking counter may be destroyed.
-  //
-  // Memory ordering: For any threads X and Y, any action taken by X
-  // before X calls `DecrementCount()` is visible to Y after Y returns
-  // from `Wait()`.
-  void Wait();
-
- private:
-  Mutex lock_;
-  int count_ ABSL_GUARDED_BY(lock_);
-  int num_waiting_ ABSL_GUARDED_BY(lock_);
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_SYNCHRONIZATION_BLOCKING_COUNTER_H_
diff --git a/third_party/abseil/absl/synchronization/blocking_counter_test.cc b/third_party/abseil/absl/synchronization/blocking_counter_test.cc
deleted file mode 100644
index 2926224..0000000
--- a/third_party/abseil/absl/synchronization/blocking_counter_test.cc
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/blocking_counter.h"
-
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-void PauseAndDecreaseCounter(BlockingCounter* counter, int* done) {
-  absl::SleepFor(absl::Seconds(1));
-  *done = 1;
-  counter->DecrementCount();
-}
-
-TEST(BlockingCounterTest, BasicFunctionality) {
-  // This test verifies that BlockingCounter functions correctly. Starts a
-  // number of threads that just sleep for a second and decrement a counter.
-
-  // Initialize the counter.
-  const int num_workers = 10;
-  BlockingCounter counter(num_workers);
-
-  std::vector<std::thread> workers;
-  std::vector<int> done(num_workers, 0);
-
-  // Start a number of parallel tasks that will just wait for a seconds and
-  // then decrement the count.
-  workers.reserve(num_workers);
-  for (int k = 0; k < num_workers; k++) {
-    workers.emplace_back(
-        [&counter, &done, k] { PauseAndDecreaseCounter(&counter, &done[k]); });
-  }
-
-  // Wait for the threads to have all finished.
-  counter.Wait();
-
-  // Check that all the workers have completed.
-  for (int k = 0; k < num_workers; k++) {
-    EXPECT_EQ(1, done[k]);
-  }
-
-  for (std::thread& w : workers) {
-    w.join();
-  }
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/internal/create_thread_identity.cc b/third_party/abseil/absl/synchronization/internal/create_thread_identity.cc
deleted file mode 100644
index 53a71b3..0000000
--- a/third_party/abseil/absl/synchronization/internal/create_thread_identity.cc
+++ /dev/null
@@ -1,140 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <stdint.h>
-#include <new>
-
-// This file is a no-op if the required LowLevelAlloc support is missing.
-#include "absl/base/internal/low_level_alloc.h"
-#ifndef ABSL_LOW_LEVEL_ALLOC_MISSING
-
-#include <string.h>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/synchronization/internal/per_thread_sem.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// ThreadIdentity storage is persistent, we maintain a free-list of previously
-// released ThreadIdentity objects.
-ABSL_CONST_INIT static base_internal::SpinLock freelist_lock(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-ABSL_CONST_INIT static base_internal::ThreadIdentity* thread_identity_freelist;
-
-// A per-thread destructor for reclaiming associated ThreadIdentity objects.
-// Since we must preserve their storage we cache them for re-use.
-void ReclaimThreadIdentity(void* v) {
-  base_internal::ThreadIdentity* identity =
-      static_cast<base_internal::ThreadIdentity*>(v);
-
-  // all_locks might have been allocated by the Mutex implementation.
-  // We free it here when we are notified that our thread is dying.
-  if (identity->per_thread_synch.all_locks != nullptr) {
-    base_internal::LowLevelAlloc::Free(identity->per_thread_synch.all_locks);
-  }
-
-  PerThreadSem::Destroy(identity);
-
-  // We must explicitly clear the current thread's identity:
-  // (a) Subsequent (unrelated) per-thread destructors may require an identity.
-  //     We must guarantee a new identity is used in this case (this instructor
-  //     will be reinvoked up to PTHREAD_DESTRUCTOR_ITERATIONS in this case).
-  // (b) ThreadIdentity implementations may depend on memory that is not
-  //     reinitialized before reuse.  We must allow explicit clearing of the
-  //     association state in this case.
-  base_internal::ClearCurrentThreadIdentity();
-  {
-    base_internal::SpinLockHolder l(&freelist_lock);
-    identity->next = thread_identity_freelist;
-    thread_identity_freelist = identity;
-  }
-}
-
-// Return value rounded up to next multiple of align.
-// Align must be a power of two.
-static intptr_t RoundUp(intptr_t addr, intptr_t align) {
-  return (addr + align - 1) & ~(align - 1);
-}
-
-static void ResetThreadIdentity(base_internal::ThreadIdentity* identity) {
-  base_internal::PerThreadSynch* pts = &identity->per_thread_synch;
-  pts->next = nullptr;
-  pts->skip = nullptr;
-  pts->may_skip = false;
-  pts->waitp = nullptr;
-  pts->suppress_fatal_errors = false;
-  pts->readers = 0;
-  pts->priority = 0;
-  pts->next_priority_read_cycles = 0;
-  pts->state.store(base_internal::PerThreadSynch::State::kAvailable,
-                   std::memory_order_relaxed);
-  pts->maybe_unlocking = false;
-  pts->wake = false;
-  pts->cond_waiter = false;
-  pts->all_locks = nullptr;
-  identity->blocked_count_ptr = nullptr;
-  identity->ticker.store(0, std::memory_order_relaxed);
-  identity->wait_start.store(0, std::memory_order_relaxed);
-  identity->is_idle.store(false, std::memory_order_relaxed);
-  identity->next = nullptr;
-}
-
-static base_internal::ThreadIdentity* NewThreadIdentity() {
-  base_internal::ThreadIdentity* identity = nullptr;
-
-  {
-    // Re-use a previously released object if possible.
-    base_internal::SpinLockHolder l(&freelist_lock);
-    if (thread_identity_freelist) {
-      identity = thread_identity_freelist;  // Take list-head.
-      thread_identity_freelist = thread_identity_freelist->next;
-    }
-  }
-
-  if (identity == nullptr) {
-    // Allocate enough space to align ThreadIdentity to a multiple of
-    // PerThreadSynch::kAlignment. This space is never released (it is
-    // added to a freelist by ReclaimThreadIdentity instead).
-    void* allocation = base_internal::LowLevelAlloc::Alloc(
-        sizeof(*identity) + base_internal::PerThreadSynch::kAlignment - 1);
-    // Round up the address to the required alignment.
-    identity = reinterpret_cast<base_internal::ThreadIdentity*>(
-        RoundUp(reinterpret_cast<intptr_t>(allocation),
-                base_internal::PerThreadSynch::kAlignment));
-  }
-  ResetThreadIdentity(identity);
-
-  return identity;
-}
-
-// Allocates and attaches ThreadIdentity object for the calling thread.  Returns
-// the new identity.
-// REQUIRES: CurrentThreadIdentity(false) == nullptr
-base_internal::ThreadIdentity* CreateThreadIdentity() {
-  base_internal::ThreadIdentity* identity = NewThreadIdentity();
-  PerThreadSem::Init(identity);
-  // Associate the value with the current thread, and attach our destructor.
-  base_internal::SetCurrentThreadIdentity(identity, ReclaimThreadIdentity);
-  return identity;
-}
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_LOW_LEVEL_ALLOC_MISSING
diff --git a/third_party/abseil/absl/synchronization/internal/create_thread_identity.h b/third_party/abseil/absl/synchronization/internal/create_thread_identity.h
deleted file mode 100644
index e121f68..0000000
--- a/third_party/abseil/absl/synchronization/internal/create_thread_identity.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright 2017 The Abseil Authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// Interface for getting the current ThreadIdentity, creating one if necessary.
-// See thread_identity.h.
-//
-// This file is separate from thread_identity.h because creating a new
-// ThreadIdentity requires slightly higher level libraries (per_thread_sem
-// and low_level_alloc) than accessing an existing one.  This separation allows
-// us to have a smaller //absl/base:base.
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_CREATE_THREAD_IDENTITY_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_CREATE_THREAD_IDENTITY_H_
-
-#include "absl/base/internal/thread_identity.h"
-#include "absl/base/port.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// Allocates and attaches a ThreadIdentity object for the calling thread.
-// For private use only.
-base_internal::ThreadIdentity* CreateThreadIdentity();
-
-// A per-thread destructor for reclaiming associated ThreadIdentity objects.
-// For private use only.
-void ReclaimThreadIdentity(void* v);
-
-// Returns the ThreadIdentity object representing the calling thread; guaranteed
-// to be unique for its lifetime.  The returned object will remain valid for the
-// program's lifetime; although it may be re-assigned to a subsequent thread.
-// If one does not exist for the calling thread, allocate it now.
-inline base_internal::ThreadIdentity* GetOrCreateCurrentThreadIdentity() {
-  base_internal::ThreadIdentity* identity =
-      base_internal::CurrentThreadIdentityIfPresent();
-  if (ABSL_PREDICT_FALSE(identity == nullptr)) {
-    return CreateThreadIdentity();
-  }
-  return identity;
-}
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_SYNCHRONIZATION_INTERNAL_CREATE_THREAD_IDENTITY_H_
diff --git a/third_party/abseil/absl/synchronization/internal/futex.h b/third_party/abseil/absl/synchronization/internal/futex.h
deleted file mode 100644
index 06fbd6d..0000000
--- a/third_party/abseil/absl/synchronization/internal/futex.h
+++ /dev/null
@@ -1,154 +0,0 @@
-// Copyright 2020 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_FUTEX_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_FUTEX_H_
-
-#include "absl/base/config.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#else
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#ifdef __linux__
-#include <linux/futex.h>
-#include <sys/syscall.h>
-#endif
-
-#include <errno.h>
-#include <stdio.h>
-#include <time.h>
-
-#include <atomic>
-#include <cstdint>
-
-#include "absl/base/optimization.h"
-#include "absl/synchronization/internal/kernel_timeout.h"
-
-#ifdef ABSL_INTERNAL_HAVE_FUTEX
-#error ABSL_INTERNAL_HAVE_FUTEX may not be set on the command line
-#elif defined(__BIONIC__)
-// Bionic supports all the futex operations we need even when some of the futex
-// definitions are missing.
-#define ABSL_INTERNAL_HAVE_FUTEX
-#elif defined(__linux__) && defined(FUTEX_CLOCK_REALTIME)
-// FUTEX_CLOCK_REALTIME requires Linux >= 2.6.28.
-#define ABSL_INTERNAL_HAVE_FUTEX
-#endif
-
-#ifdef ABSL_INTERNAL_HAVE_FUTEX
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// Some Android headers are missing these definitions even though they
-// support these futex operations.
-#ifdef __BIONIC__
-#ifndef SYS_futex
-#define SYS_futex __NR_futex
-#endif
-#ifndef FUTEX_WAIT_BITSET
-#define FUTEX_WAIT_BITSET 9
-#endif
-#ifndef FUTEX_PRIVATE_FLAG
-#define FUTEX_PRIVATE_FLAG 128
-#endif
-#ifndef FUTEX_CLOCK_REALTIME
-#define FUTEX_CLOCK_REALTIME 256
-#endif
-#ifndef FUTEX_BITSET_MATCH_ANY
-#define FUTEX_BITSET_MATCH_ANY 0xFFFFFFFF
-#endif
-#endif
-
-#if defined(__NR_futex_time64) && !defined(SYS_futex_time64)
-#define SYS_futex_time64 __NR_futex_time64
-#endif
-
-#if defined(SYS_futex_time64) && !defined(SYS_futex)
-#define SYS_futex SYS_futex_time64
-#endif
-
-class FutexImpl {
- public:
-  static int WaitUntil(std::atomic<int32_t> *v, int32_t val,
-                       KernelTimeout t) {
-    int err = 0;
-    if (t.has_timeout()) {
-      // https://locklessinc.com/articles/futex_cheat_sheet/
-      // Unlike FUTEX_WAIT, FUTEX_WAIT_BITSET uses absolute time.
-      struct timespec abs_timeout = t.MakeAbsTimespec();
-      // Atomically check that the futex value is still 0, and if it
-      // is, sleep until abs_timeout or until woken by FUTEX_WAKE.
-      err = syscall(
-          SYS_futex, reinterpret_cast<int32_t *>(v),
-          FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME, val,
-          &abs_timeout, nullptr, FUTEX_BITSET_MATCH_ANY);
-    } else {
-      // Atomically check that the futex value is still 0, and if it
-      // is, sleep until woken by FUTEX_WAKE.
-      err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                    FUTEX_WAIT | FUTEX_PRIVATE_FLAG, val, nullptr);
-    }
-    if (ABSL_PREDICT_FALSE(err != 0)) {
-      err = -errno;
-    }
-    return err;
-  }
-
-  static int WaitBitsetAbsoluteTimeout(std::atomic<int32_t> *v, int32_t val,
-                                       int32_t bits,
-                                       const struct timespec *abstime) {
-    int err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                      FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG, val, abstime,
-                      nullptr, bits);
-    if (ABSL_PREDICT_FALSE(err != 0)) {
-      err = -errno;
-    }
-    return err;
-  }
-
-  static int Wake(std::atomic<int32_t> *v, int32_t count) {
-    int err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                      FUTEX_WAKE | FUTEX_PRIVATE_FLAG, count);
-    if (ABSL_PREDICT_FALSE(err < 0)) {
-      err = -errno;
-    }
-    return err;
-  }
-
-  // FUTEX_WAKE_BITSET
-  static int WakeBitset(std::atomic<int32_t> *v, int32_t count, int32_t bits) {
-    int err = syscall(SYS_futex, reinterpret_cast<int32_t *>(v),
-                      FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG, count, nullptr,
-                      nullptr, bits);
-    if (ABSL_PREDICT_FALSE(err < 0)) {
-      err = -errno;
-    }
-    return err;
-  }
-};
-
-class Futex : public FutexImpl {};
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_INTERNAL_HAVE_FUTEX
-
-#endif  // ABSL_SYNCHRONIZATION_INTERNAL_FUTEX_H_
diff --git a/third_party/abseil/absl/synchronization/internal/graphcycles.cc b/third_party/abseil/absl/synchronization/internal/graphcycles.cc
deleted file mode 100644
index 27fec21..0000000
--- a/third_party/abseil/absl/synchronization/internal/graphcycles.cc
+++ /dev/null
@@ -1,698 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// GraphCycles provides incremental cycle detection on a dynamic
-// graph using the following algorithm:
-//
-// A dynamic topological sort algorithm for directed acyclic graphs
-// David J. Pearce, Paul H. J. Kelly
-// Journal of Experimental Algorithmics (JEA) JEA Homepage archive
-// Volume 11, 2006, Article No. 1.7
-//
-// Brief summary of the algorithm:
-//
-// (1) Maintain a rank for each node that is consistent
-//     with the topological sort of the graph. I.e., path from x to y
-//     implies rank[x] < rank[y].
-// (2) When a new edge (x->y) is inserted, do nothing if rank[x] < rank[y].
-// (3) Otherwise: adjust ranks in the neighborhood of x and y.
-
-#include "absl/base/attributes.h"
-// This file is a no-op if the required LowLevelAlloc support is missing.
-#include "absl/base/internal/low_level_alloc.h"
-#ifndef ABSL_LOW_LEVEL_ALLOC_MISSING
-
-#include "absl/synchronization/internal/graphcycles.h"
-
-#include <algorithm>
-#include <array>
-#include <limits>
-#include "absl/base/internal/hide_ptr.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-
-// Do not use STL.   This module does not use standard memory allocation.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-namespace {
-
-// Avoid LowLevelAlloc's default arena since it calls malloc hooks in
-// which people are doing things like acquiring Mutexes.
-ABSL_CONST_INIT static absl::base_internal::SpinLock arena_mu(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-ABSL_CONST_INIT static base_internal::LowLevelAlloc::Arena* arena;
-
-static void InitArenaIfNecessary() {
-  arena_mu.Lock();
-  if (arena == nullptr) {
-    arena = base_internal::LowLevelAlloc::NewArena(0);
-  }
-  arena_mu.Unlock();
-}
-
-// Number of inlined elements in Vec.  Hash table implementation
-// relies on this being a power of two.
-static const uint32_t kInline = 8;
-
-// A simple LowLevelAlloc based resizable vector with inlined storage
-// for a few elements.  T must be a plain type since constructor
-// and destructor are not run on elements of type T managed by Vec.
-template <typename T>
-class Vec {
- public:
-  Vec() { Init(); }
-  ~Vec() { Discard(); }
-
-  void clear() {
-    Discard();
-    Init();
-  }
-
-  bool empty() const { return size_ == 0; }
-  uint32_t size() const { return size_; }
-  T* begin() { return ptr_; }
-  T* end() { return ptr_ + size_; }
-  const T& operator[](uint32_t i) const { return ptr_[i]; }
-  T& operator[](uint32_t i) { return ptr_[i]; }
-  const T& back() const { return ptr_[size_-1]; }
-  void pop_back() { size_--; }
-
-  void push_back(const T& v) {
-    if (size_ == capacity_) Grow(size_ + 1);
-    ptr_[size_] = v;
-    size_++;
-  }
-
-  void resize(uint32_t n) {
-    if (n > capacity_) Grow(n);
-    size_ = n;
-  }
-
-  void fill(const T& val) {
-    for (uint32_t i = 0; i < size(); i++) {
-      ptr_[i] = val;
-    }
-  }
-
-  // Guarantees src is empty at end.
-  // Provided for the hash table resizing code below.
-  void MoveFrom(Vec<T>* src) {
-    if (src->ptr_ == src->space_) {
-      // Need to actually copy
-      resize(src->size_);
-      std::copy(src->ptr_, src->ptr_ + src->size_, ptr_);
-      src->size_ = 0;
-    } else {
-      Discard();
-      ptr_ = src->ptr_;
-      size_ = src->size_;
-      capacity_ = src->capacity_;
-      src->Init();
-    }
-  }
-
- private:
-  T* ptr_;
-  T space_[kInline];
-  uint32_t size_;
-  uint32_t capacity_;
-
-  void Init() {
-    ptr_ = space_;
-    size_ = 0;
-    capacity_ = kInline;
-  }
-
-  void Discard() {
-    if (ptr_ != space_) base_internal::LowLevelAlloc::Free(ptr_);
-  }
-
-  void Grow(uint32_t n) {
-    while (capacity_ < n) {
-      capacity_ *= 2;
-    }
-    size_t request = static_cast<size_t>(capacity_) * sizeof(T);
-    T* copy = static_cast<T*>(
-        base_internal::LowLevelAlloc::AllocWithArena(request, arena));
-    std::copy(ptr_, ptr_ + size_, copy);
-    Discard();
-    ptr_ = copy;
-  }
-
-  Vec(const Vec&) = delete;
-  Vec& operator=(const Vec&) = delete;
-};
-
-// A hash set of non-negative int32_t that uses Vec for its underlying storage.
-class NodeSet {
- public:
-  NodeSet() { Init(); }
-
-  void clear() { Init(); }
-  bool contains(int32_t v) const { return table_[FindIndex(v)] == v; }
-
-  bool insert(int32_t v) {
-    uint32_t i = FindIndex(v);
-    if (table_[i] == v) {
-      return false;
-    }
-    if (table_[i] == kEmpty) {
-      // Only inserting over an empty cell increases the number of occupied
-      // slots.
-      occupied_++;
-    }
-    table_[i] = v;
-    // Double when 75% full.
-    if (occupied_ >= table_.size() - table_.size()/4) Grow();
-    return true;
-  }
-
-  void erase(uint32_t v) {
-    uint32_t i = FindIndex(v);
-    if (static_cast<uint32_t>(table_[i]) == v) {
-      table_[i] = kDel;
-    }
-  }
-
-  // Iteration: is done via HASH_FOR_EACH
-  // Example:
-  //    HASH_FOR_EACH(elem, node->out) { ... }
-#define HASH_FOR_EACH(elem, eset) \
-  for (int32_t elem, _cursor = 0; (eset).Next(&_cursor, &elem); )
-  bool Next(int32_t* cursor, int32_t* elem) {
-    while (static_cast<uint32_t>(*cursor) < table_.size()) {
-      int32_t v = table_[*cursor];
-      (*cursor)++;
-      if (v >= 0) {
-        *elem = v;
-        return true;
-      }
-    }
-    return false;
-  }
-
- private:
-  enum : int32_t { kEmpty = -1, kDel = -2 };
-  Vec<int32_t> table_;
-  uint32_t occupied_;     // Count of non-empty slots (includes deleted slots)
-
-  static uint32_t Hash(uint32_t a) { return a * 41; }
-
-  // Return index for storing v.  May return an empty index or deleted index
-  int FindIndex(int32_t v) const {
-    // Search starting at hash index.
-    const uint32_t mask = table_.size() - 1;
-    uint32_t i = Hash(v) & mask;
-    int deleted_index = -1;  // If >= 0, index of first deleted element we see
-    while (true) {
-      int32_t e = table_[i];
-      if (v == e) {
-        return i;
-      } else if (e == kEmpty) {
-        // Return any previously encountered deleted slot.
-        return (deleted_index >= 0) ? deleted_index : i;
-      } else if (e == kDel && deleted_index < 0) {
-        // Keep searching since v might be present later.
-        deleted_index = i;
-      }
-      i = (i + 1) & mask;  // Linear probing; quadratic is slightly slower.
-    }
-  }
-
-  void Init() {
-    table_.clear();
-    table_.resize(kInline);
-    table_.fill(kEmpty);
-    occupied_ = 0;
-  }
-
-  void Grow() {
-    Vec<int32_t> copy;
-    copy.MoveFrom(&table_);
-    occupied_ = 0;
-    table_.resize(copy.size() * 2);
-    table_.fill(kEmpty);
-
-    for (const auto& e : copy) {
-      if (e >= 0) insert(e);
-    }
-  }
-
-  NodeSet(const NodeSet&) = delete;
-  NodeSet& operator=(const NodeSet&) = delete;
-};
-
-// We encode a node index and a node version in GraphId.  The version
-// number is incremented when the GraphId is freed which automatically
-// invalidates all copies of the GraphId.
-
-inline GraphId MakeId(int32_t index, uint32_t version) {
-  GraphId g;
-  g.handle =
-      (static_cast<uint64_t>(version) << 32) | static_cast<uint32_t>(index);
-  return g;
-}
-
-inline int32_t NodeIndex(GraphId id) {
-  return static_cast<uint32_t>(id.handle & 0xfffffffful);
-}
-
-inline uint32_t NodeVersion(GraphId id) {
-  return static_cast<uint32_t>(id.handle >> 32);
-}
-
-struct Node {
-  int32_t rank;               // rank number assigned by Pearce-Kelly algorithm
-  uint32_t version;           // Current version number
-  int32_t next_hash;          // Next entry in hash table
-  bool visited;               // Temporary marker used by depth-first-search
-  uintptr_t masked_ptr;       // User-supplied pointer
-  NodeSet in;                 // List of immediate predecessor nodes in graph
-  NodeSet out;                // List of immediate successor nodes in graph
-  int priority;               // Priority of recorded stack trace.
-  int nstack;                 // Depth of recorded stack trace.
-  void* stack[40];            // stack[0,nstack-1] holds stack trace for node.
-};
-
-// Hash table for pointer to node index lookups.
-class PointerMap {
- public:
-  explicit PointerMap(const Vec<Node*>* nodes) : nodes_(nodes) {
-    table_.fill(-1);
-  }
-
-  int32_t Find(void* ptr) {
-    auto masked = base_internal::HidePtr(ptr);
-    for (int32_t i = table_[Hash(ptr)]; i != -1;) {
-      Node* n = (*nodes_)[i];
-      if (n->masked_ptr == masked) return i;
-      i = n->next_hash;
-    }
-    return -1;
-  }
-
-  void Add(void* ptr, int32_t i) {
-    int32_t* head = &table_[Hash(ptr)];
-    (*nodes_)[i]->next_hash = *head;
-    *head = i;
-  }
-
-  int32_t Remove(void* ptr) {
-    // Advance through linked list while keeping track of the
-    // predecessor slot that points to the current entry.
-    auto masked = base_internal::HidePtr(ptr);
-    for (int32_t* slot = &table_[Hash(ptr)]; *slot != -1; ) {
-      int32_t index = *slot;
-      Node* n = (*nodes_)[index];
-      if (n->masked_ptr == masked) {
-        *slot = n->next_hash;  // Remove n from linked list
-        n->next_hash = -1;
-        return index;
-      }
-      slot = &n->next_hash;
-    }
-    return -1;
-  }
-
- private:
-  // Number of buckets in hash table for pointer lookups.
-  static constexpr uint32_t kHashTableSize = 8171;  // should be prime
-
-  const Vec<Node*>* nodes_;
-  std::array<int32_t, kHashTableSize> table_;
-
-  static uint32_t Hash(void* ptr) {
-    return reinterpret_cast<uintptr_t>(ptr) % kHashTableSize;
-  }
-};
-
-}  // namespace
-
-struct GraphCycles::Rep {
-  Vec<Node*> nodes_;
-  Vec<int32_t> free_nodes_;  // Indices for unused entries in nodes_
-  PointerMap ptrmap_;
-
-  // Temporary state.
-  Vec<int32_t> deltaf_;  // Results of forward DFS
-  Vec<int32_t> deltab_;  // Results of backward DFS
-  Vec<int32_t> list_;    // All nodes to reprocess
-  Vec<int32_t> merged_;  // Rank values to assign to list_ entries
-  Vec<int32_t> stack_;   // Emulates recursion stack for depth-first searches
-
-  Rep() : ptrmap_(&nodes_) {}
-};
-
-static Node* FindNode(GraphCycles::Rep* rep, GraphId id) {
-  Node* n = rep->nodes_[NodeIndex(id)];
-  return (n->version == NodeVersion(id)) ? n : nullptr;
-}
-
-GraphCycles::GraphCycles() {
-  InitArenaIfNecessary();
-  rep_ = new (base_internal::LowLevelAlloc::AllocWithArena(sizeof(Rep), arena))
-      Rep;
-}
-
-GraphCycles::~GraphCycles() {
-  for (auto* node : rep_->nodes_) {
-    node->Node::~Node();
-    base_internal::LowLevelAlloc::Free(node);
-  }
-  rep_->Rep::~Rep();
-  base_internal::LowLevelAlloc::Free(rep_);
-}
-
-bool GraphCycles::CheckInvariants() const {
-  Rep* r = rep_;
-  NodeSet ranks;  // Set of ranks seen so far.
-  for (uint32_t x = 0; x < r->nodes_.size(); x++) {
-    Node* nx = r->nodes_[x];
-    void* ptr = base_internal::UnhidePtr<void>(nx->masked_ptr);
-    if (ptr != nullptr && static_cast<uint32_t>(r->ptrmap_.Find(ptr)) != x) {
-      ABSL_RAW_LOG(FATAL, "Did not find live node in hash table %u %p", x, ptr);
-    }
-    if (nx->visited) {
-      ABSL_RAW_LOG(FATAL, "Did not clear visited marker on node %u", x);
-    }
-    if (!ranks.insert(nx->rank)) {
-      ABSL_RAW_LOG(FATAL, "Duplicate occurrence of rank %d", nx->rank);
-    }
-    HASH_FOR_EACH(y, nx->out) {
-      Node* ny = r->nodes_[y];
-      if (nx->rank >= ny->rank) {
-        ABSL_RAW_LOG(FATAL, "Edge %u->%d has bad rank assignment %d->%d", x, y,
-                     nx->rank, ny->rank);
-      }
-    }
-  }
-  return true;
-}
-
-GraphId GraphCycles::GetId(void* ptr) {
-  int32_t i = rep_->ptrmap_.Find(ptr);
-  if (i != -1) {
-    return MakeId(i, rep_->nodes_[i]->version);
-  } else if (rep_->free_nodes_.empty()) {
-    Node* n =
-        new (base_internal::LowLevelAlloc::AllocWithArena(sizeof(Node), arena))
-            Node;
-    n->version = 1;  // Avoid 0 since it is used by InvalidGraphId()
-    n->visited = false;
-    n->rank = rep_->nodes_.size();
-    n->masked_ptr = base_internal::HidePtr(ptr);
-    n->nstack = 0;
-    n->priority = 0;
-    rep_->nodes_.push_back(n);
-    rep_->ptrmap_.Add(ptr, n->rank);
-    return MakeId(n->rank, n->version);
-  } else {
-    // Preserve preceding rank since the set of ranks in use must be
-    // a permutation of [0,rep_->nodes_.size()-1].
-    int32_t r = rep_->free_nodes_.back();
-    rep_->free_nodes_.pop_back();
-    Node* n = rep_->nodes_[r];
-    n->masked_ptr = base_internal::HidePtr(ptr);
-    n->nstack = 0;
-    n->priority = 0;
-    rep_->ptrmap_.Add(ptr, r);
-    return MakeId(r, n->version);
-  }
-}
-
-void GraphCycles::RemoveNode(void* ptr) {
-  int32_t i = rep_->ptrmap_.Remove(ptr);
-  if (i == -1) {
-    return;
-  }
-  Node* x = rep_->nodes_[i];
-  HASH_FOR_EACH(y, x->out) {
-    rep_->nodes_[y]->in.erase(i);
-  }
-  HASH_FOR_EACH(y, x->in) {
-    rep_->nodes_[y]->out.erase(i);
-  }
-  x->in.clear();
-  x->out.clear();
-  x->masked_ptr = base_internal::HidePtr<void>(nullptr);
-  if (x->version == std::numeric_limits<uint32_t>::max()) {
-    // Cannot use x any more
-  } else {
-    x->version++;  // Invalidates all copies of node.
-    rep_->free_nodes_.push_back(i);
-  }
-}
-
-void* GraphCycles::Ptr(GraphId id) {
-  Node* n = FindNode(rep_, id);
-  return n == nullptr ? nullptr
-                      : base_internal::UnhidePtr<void>(n->masked_ptr);
-}
-
-bool GraphCycles::HasNode(GraphId node) {
-  return FindNode(rep_, node) != nullptr;
-}
-
-bool GraphCycles::HasEdge(GraphId x, GraphId y) const {
-  Node* xn = FindNode(rep_, x);
-  return xn && FindNode(rep_, y) && xn->out.contains(NodeIndex(y));
-}
-
-void GraphCycles::RemoveEdge(GraphId x, GraphId y) {
-  Node* xn = FindNode(rep_, x);
-  Node* yn = FindNode(rep_, y);
-  if (xn && yn) {
-    xn->out.erase(NodeIndex(y));
-    yn->in.erase(NodeIndex(x));
-    // No need to update the rank assignment since a previous valid
-    // rank assignment remains valid after an edge deletion.
-  }
-}
-
-static bool ForwardDFS(GraphCycles::Rep* r, int32_t n, int32_t upper_bound);
-static void BackwardDFS(GraphCycles::Rep* r, int32_t n, int32_t lower_bound);
-static void Reorder(GraphCycles::Rep* r);
-static void Sort(const Vec<Node*>&, Vec<int32_t>* delta);
-static void MoveToList(
-    GraphCycles::Rep* r, Vec<int32_t>* src, Vec<int32_t>* dst);
-
-bool GraphCycles::InsertEdge(GraphId idx, GraphId idy) {
-  Rep* r = rep_;
-  const int32_t x = NodeIndex(idx);
-  const int32_t y = NodeIndex(idy);
-  Node* nx = FindNode(r, idx);
-  Node* ny = FindNode(r, idy);
-  if (nx == nullptr || ny == nullptr) return true;  // Expired ids
-
-  if (nx == ny) return false;  // Self edge
-  if (!nx->out.insert(y)) {
-    // Edge already exists.
-    return true;
-  }
-
-  ny->in.insert(x);
-
-  if (nx->rank <= ny->rank) {
-    // New edge is consistent with existing rank assignment.
-    return true;
-  }
-
-  // Current rank assignments are incompatible with the new edge.  Recompute.
-  // We only need to consider nodes that fall in the range [ny->rank,nx->rank].
-  if (!ForwardDFS(r, y, nx->rank)) {
-    // Found a cycle.  Undo the insertion and tell caller.
-    nx->out.erase(y);
-    ny->in.erase(x);
-    // Since we do not call Reorder() on this path, clear any visited
-    // markers left by ForwardDFS.
-    for (const auto& d : r->deltaf_) {
-      r->nodes_[d]->visited = false;
-    }
-    return false;
-  }
-  BackwardDFS(r, x, ny->rank);
-  Reorder(r);
-  return true;
-}
-
-static bool ForwardDFS(GraphCycles::Rep* r, int32_t n, int32_t upper_bound) {
-  // Avoid recursion since stack space might be limited.
-  // We instead keep a stack of nodes to visit.
-  r->deltaf_.clear();
-  r->stack_.clear();
-  r->stack_.push_back(n);
-  while (!r->stack_.empty()) {
-    n = r->stack_.back();
-    r->stack_.pop_back();
-    Node* nn = r->nodes_[n];
-    if (nn->visited) continue;
-
-    nn->visited = true;
-    r->deltaf_.push_back(n);
-
-    HASH_FOR_EACH(w, nn->out) {
-      Node* nw = r->nodes_[w];
-      if (nw->rank == upper_bound) {
-        return false;  // Cycle
-      }
-      if (!nw->visited && nw->rank < upper_bound) {
-        r->stack_.push_back(w);
-      }
-    }
-  }
-  return true;
-}
-
-static void BackwardDFS(GraphCycles::Rep* r, int32_t n, int32_t lower_bound) {
-  r->deltab_.clear();
-  r->stack_.clear();
-  r->stack_.push_back(n);
-  while (!r->stack_.empty()) {
-    n = r->stack_.back();
-    r->stack_.pop_back();
-    Node* nn = r->nodes_[n];
-    if (nn->visited) continue;
-
-    nn->visited = true;
-    r->deltab_.push_back(n);
-
-    HASH_FOR_EACH(w, nn->in) {
-      Node* nw = r->nodes_[w];
-      if (!nw->visited && lower_bound < nw->rank) {
-        r->stack_.push_back(w);
-      }
-    }
-  }
-}
-
-static void Reorder(GraphCycles::Rep* r) {
-  Sort(r->nodes_, &r->deltab_);
-  Sort(r->nodes_, &r->deltaf_);
-
-  // Adds contents of delta lists to list_ (backwards deltas first).
-  r->list_.clear();
-  MoveToList(r, &r->deltab_, &r->list_);
-  MoveToList(r, &r->deltaf_, &r->list_);
-
-  // Produce sorted list of all ranks that will be reassigned.
-  r->merged_.resize(r->deltab_.size() + r->deltaf_.size());
-  std::merge(r->deltab_.begin(), r->deltab_.end(),
-             r->deltaf_.begin(), r->deltaf_.end(),
-             r->merged_.begin());
-
-  // Assign the ranks in order to the collected list.
-  for (uint32_t i = 0; i < r->list_.size(); i++) {
-    r->nodes_[r->list_[i]]->rank = r->merged_[i];
-  }
-}
-
-static void Sort(const Vec<Node*>& nodes, Vec<int32_t>* delta) {
-  struct ByRank {
-    const Vec<Node*>* nodes;
-    bool operator()(int32_t a, int32_t b) const {
-      return (*nodes)[a]->rank < (*nodes)[b]->rank;
-    }
-  };
-  ByRank cmp;
-  cmp.nodes = &nodes;
-  std::sort(delta->begin(), delta->end(), cmp);
-}
-
-static void MoveToList(
-    GraphCycles::Rep* r, Vec<int32_t>* src, Vec<int32_t>* dst) {
-  for (auto& v : *src) {
-    int32_t w = v;
-    v = r->nodes_[w]->rank;         // Replace v entry with its rank
-    r->nodes_[w]->visited = false;  // Prepare for future DFS calls
-    dst->push_back(w);
-  }
-}
-
-int GraphCycles::FindPath(GraphId idx, GraphId idy, int max_path_len,
-                          GraphId path[]) const {
-  Rep* r = rep_;
-  if (FindNode(r, idx) == nullptr || FindNode(r, idy) == nullptr) return 0;
-  const int32_t x = NodeIndex(idx);
-  const int32_t y = NodeIndex(idy);
-
-  // Forward depth first search starting at x until we hit y.
-  // As we descend into a node, we push it onto the path.
-  // As we leave a node, we remove it from the path.
-  int path_len = 0;
-
-  NodeSet seen;
-  r->stack_.clear();
-  r->stack_.push_back(x);
-  while (!r->stack_.empty()) {
-    int32_t n = r->stack_.back();
-    r->stack_.pop_back();
-    if (n < 0) {
-      // Marker to indicate that we are leaving a node
-      path_len--;
-      continue;
-    }
-
-    if (path_len < max_path_len) {
-      path[path_len] = MakeId(n, rep_->nodes_[n]->version);
-    }
-    path_len++;
-    r->stack_.push_back(-1);  // Will remove tentative path entry
-
-    if (n == y) {
-      return path_len;
-    }
-
-    HASH_FOR_EACH(w, r->nodes_[n]->out) {
-      if (seen.insert(w)) {
-        r->stack_.push_back(w);
-      }
-    }
-  }
-
-  return 0;
-}
-
-bool GraphCycles::IsReachable(GraphId x, GraphId y) const {
-  return FindPath(x, y, 0, nullptr) > 0;
-}
-
-void GraphCycles::UpdateStackTrace(GraphId id, int priority,
-                                   int (*get_stack_trace)(void** stack, int)) {
-  Node* n = FindNode(rep_, id);
-  if (n == nullptr || n->priority >= priority) {
-    return;
-  }
-  n->nstack = (*get_stack_trace)(n->stack, ABSL_ARRAYSIZE(n->stack));
-  n->priority = priority;
-}
-
-int GraphCycles::GetStackTrace(GraphId id, void*** ptr) {
-  Node* n = FindNode(rep_, id);
-  if (n == nullptr) {
-    *ptr = nullptr;
-    return 0;
-  } else {
-    *ptr = n->stack;
-    return n->nstack;
-  }
-}
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_LOW_LEVEL_ALLOC_MISSING
diff --git a/third_party/abseil/absl/synchronization/internal/graphcycles.h b/third_party/abseil/absl/synchronization/internal/graphcycles.h
deleted file mode 100644
index ceba33e..0000000
--- a/third_party/abseil/absl/synchronization/internal/graphcycles.h
+++ /dev/null
@@ -1,141 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_GRAPHCYCLES_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_GRAPHCYCLES_H_
-
-// GraphCycles detects the introduction of a cycle into a directed
-// graph that is being built up incrementally.
-//
-// Nodes are identified by small integers.  It is not possible to
-// record multiple edges with the same (source, destination) pair;
-// requests to add an edge where one already exists are silently
-// ignored.
-//
-// It is also not possible to introduce a cycle; an attempt to insert
-// an edge that would introduce a cycle fails and returns false.
-//
-// GraphCycles uses no internal locking; calls into it should be
-// serialized externally.
-
-// Performance considerations:
-//   Works well on sparse graphs, poorly on dense graphs.
-//   Extra information is maintained incrementally to detect cycles quickly.
-//   InsertEdge() is very fast when the edge already exists, and reasonably fast
-//   otherwise.
-//   FindPath() is linear in the size of the graph.
-// The current implementation uses O(|V|+|E|) space.
-
-#include <cstdint>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// Opaque identifier for a graph node.
-struct GraphId {
-  uint64_t handle;
-
-  bool operator==(const GraphId& x) const { return handle == x.handle; }
-  bool operator!=(const GraphId& x) const { return handle != x.handle; }
-};
-
-// Return an invalid graph id that will never be assigned by GraphCycles.
-inline GraphId InvalidGraphId() {
-  return GraphId{0};
-}
-
-class GraphCycles {
- public:
-  GraphCycles();
-  ~GraphCycles();
-
-  // Return the id to use for ptr, assigning one if necessary.
-  // Subsequent calls with the same ptr value will return the same id
-  // until Remove().
-  GraphId GetId(void* ptr);
-
-  // Remove "ptr" from the graph.  Its corresponding node and all
-  // edges to and from it are removed.
-  void RemoveNode(void* ptr);
-
-  // Return the pointer associated with id, or nullptr if id is not
-  // currently in the graph.
-  void* Ptr(GraphId id);
-
-  // Attempt to insert an edge from source_node to dest_node.  If the
-  // edge would introduce a cycle, return false without making any
-  // changes. Otherwise add the edge and return true.
-  bool InsertEdge(GraphId source_node, GraphId dest_node);
-
-  // Remove any edge that exists from source_node to dest_node.
-  void RemoveEdge(GraphId source_node, GraphId dest_node);
-
-  // Return whether node exists in the graph.
-  bool HasNode(GraphId node);
-
-  // Return whether there is an edge directly from source_node to dest_node.
-  bool HasEdge(GraphId source_node, GraphId dest_node) const;
-
-  // Return whether dest_node is reachable from source_node
-  // by following edges.
-  bool IsReachable(GraphId source_node, GraphId dest_node) const;
-
-  // Find a path from "source" to "dest".  If such a path exists,
-  // place the nodes on the path in the array path[], and return
-  // the number of nodes on the path.  If the path is longer than
-  // max_path_len nodes, only the first max_path_len nodes are placed
-  // in path[].  The client should compare the return value with
-  // max_path_len" to see when this occurs.  If no path exists, return
-  // 0.  Any valid path stored in path[] will start with "source" and
-  // end with "dest".  There is no guarantee that the path is the
-  // shortest, but no node will appear twice in the path, except the
-  // source and destination node if they are identical; therefore, the
-  // return value is at most one greater than the number of nodes in
-  // the graph.
-  int FindPath(GraphId source, GraphId dest, int max_path_len,
-               GraphId path[]) const;
-
-  // Update the stack trace recorded for id with the current stack
-  // trace if the last time it was updated had a smaller priority
-  // than the priority passed on this call.
-  //
-  // *get_stack_trace is called to get the stack trace.
-  void UpdateStackTrace(GraphId id, int priority,
-                        int (*get_stack_trace)(void**, int));
-
-  // Set *ptr to the beginning of the array that holds the recorded
-  // stack trace for id and return the depth of the stack trace.
-  int GetStackTrace(GraphId id, void*** ptr);
-
-  // Check internal invariants. Crashes on failure, returns true on success.
-  // Expensive: should only be called from graphcycles_test.cc.
-  bool CheckInvariants() const;
-
-  // ----------------------------------------------------
-  struct Rep;
- private:
-  Rep *rep_;      // opaque representation
-  GraphCycles(const GraphCycles&) = delete;
-  GraphCycles& operator=(const GraphCycles&) = delete;
-};
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif
diff --git a/third_party/abseil/absl/synchronization/internal/graphcycles_benchmark.cc b/third_party/abseil/absl/synchronization/internal/graphcycles_benchmark.cc
deleted file mode 100644
index 54823e0..0000000
--- a/third_party/abseil/absl/synchronization/internal/graphcycles_benchmark.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/internal/graphcycles.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace {
-
-void BM_StressTest(benchmark::State& state) {
-  const int num_nodes = state.range(0);
-  while (state.KeepRunningBatch(num_nodes)) {
-    absl::synchronization_internal::GraphCycles g;
-    std::vector<absl::synchronization_internal::GraphId> nodes(num_nodes);
-    for (int i = 0; i < num_nodes; i++) {
-      nodes[i] = g.GetId(reinterpret_cast<void*>(static_cast<uintptr_t>(i)));
-    }
-    for (int i = 0; i < num_nodes; i++) {
-      int end = std::min(num_nodes, i + 5);
-      for (int j = i + 1; j < end; j++) {
-        ABSL_RAW_CHECK(g.InsertEdge(nodes[i], nodes[j]), "");
-      }
-    }
-  }
-}
-BENCHMARK(BM_StressTest)->Range(2048, 1048576);
-
-}  // namespace
diff --git a/third_party/abseil/absl/synchronization/internal/graphcycles_test.cc b/third_party/abseil/absl/synchronization/internal/graphcycles_test.cc
deleted file mode 100644
index 74eaffe..0000000
--- a/third_party/abseil/absl/synchronization/internal/graphcycles_test.cc
+++ /dev/null
@@ -1,464 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/internal/graphcycles.h"
-
-#include <map>
-#include <random>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// We emulate a GraphCycles object with a node vector and an edge vector.
-// We then compare the two implementations.
-
-using Nodes = std::vector<int>;
-struct Edge {
-  int from;
-  int to;
-};
-using Edges = std::vector<Edge>;
-using RandomEngine = std::mt19937_64;
-
-// Mapping from integer index to GraphId.
-typedef std::map<int, GraphId> IdMap;
-static GraphId Get(const IdMap& id, int num) {
-  auto iter = id.find(num);
-  return (iter == id.end()) ? InvalidGraphId() : iter->second;
-}
-
-// Return whether "to" is reachable from "from".
-static bool IsReachable(Edges *edges, int from, int to,
-                        std::unordered_set<int> *seen) {
-  seen->insert(from);     // we are investigating "from"; don't do it again
-  if (from == to) return true;
-  for (const auto &edge : *edges) {
-    if (edge.from == from) {
-      if (edge.to == to) {  // success via edge directly
-        return true;
-      } else if (seen->find(edge.to) == seen->end() &&  // success via edge
-                 IsReachable(edges, edge.to, to, seen)) {
-        return true;
-      }
-    }
-  }
-  return false;
-}
-
-static void PrintEdges(Edges *edges) {
-  ABSL_RAW_LOG(INFO, "EDGES (%zu)", edges->size());
-  for (const auto &edge : *edges) {
-    int a = edge.from;
-    int b = edge.to;
-    ABSL_RAW_LOG(INFO, "%d %d", a, b);
-  }
-  ABSL_RAW_LOG(INFO, "---");
-}
-
-static void PrintGCEdges(Nodes *nodes, const IdMap &id, GraphCycles *gc) {
-  ABSL_RAW_LOG(INFO, "GC EDGES");
-  for (int a : *nodes) {
-    for (int b : *nodes) {
-      if (gc->HasEdge(Get(id, a), Get(id, b))) {
-        ABSL_RAW_LOG(INFO, "%d %d", a, b);
-      }
-    }
-  }
-  ABSL_RAW_LOG(INFO, "---");
-}
-
-static void PrintTransitiveClosure(Nodes *nodes, Edges *edges) {
-  ABSL_RAW_LOG(INFO, "Transitive closure");
-  for (int a : *nodes) {
-    for (int b : *nodes) {
-      std::unordered_set<int> seen;
-      if (IsReachable(edges, a, b, &seen)) {
-        ABSL_RAW_LOG(INFO, "%d %d", a, b);
-      }
-    }
-  }
-  ABSL_RAW_LOG(INFO, "---");
-}
-
-static void PrintGCTransitiveClosure(Nodes *nodes, const IdMap &id,
-                                     GraphCycles *gc) {
-  ABSL_RAW_LOG(INFO, "GC Transitive closure");
-  for (int a : *nodes) {
-    for (int b : *nodes) {
-      if (gc->IsReachable(Get(id, a), Get(id, b))) {
-        ABSL_RAW_LOG(INFO, "%d %d", a, b);
-      }
-    }
-  }
-  ABSL_RAW_LOG(INFO, "---");
-}
-
-static void CheckTransitiveClosure(Nodes *nodes, Edges *edges, const IdMap &id,
-                                   GraphCycles *gc) {
-  std::unordered_set<int> seen;
-  for (const auto &a : *nodes) {
-    for (const auto &b : *nodes) {
-      seen.clear();
-      bool gc_reachable = gc->IsReachable(Get(id, a), Get(id, b));
-      bool reachable = IsReachable(edges, a, b, &seen);
-      if (gc_reachable != reachable) {
-        PrintEdges(edges);
-        PrintGCEdges(nodes, id, gc);
-        PrintTransitiveClosure(nodes, edges);
-        PrintGCTransitiveClosure(nodes, id, gc);
-        ABSL_RAW_LOG(FATAL, "gc_reachable %s reachable %s a %d b %d",
-                     gc_reachable ? "true" : "false",
-                     reachable ? "true" : "false", a, b);
-      }
-    }
-  }
-}
-
-static void CheckEdges(Nodes *nodes, Edges *edges, const IdMap &id,
-                       GraphCycles *gc) {
-  int count = 0;
-  for (const auto &edge : *edges) {
-    int a = edge.from;
-    int b = edge.to;
-    if (!gc->HasEdge(Get(id, a), Get(id, b))) {
-      PrintEdges(edges);
-      PrintGCEdges(nodes, id, gc);
-      ABSL_RAW_LOG(FATAL, "!gc->HasEdge(%d, %d)", a, b);
-    }
-  }
-  for (const auto &a : *nodes) {
-    for (const auto &b : *nodes) {
-      if (gc->HasEdge(Get(id, a), Get(id, b))) {
-        count++;
-      }
-    }
-  }
-  if (count != edges->size()) {
-    PrintEdges(edges);
-    PrintGCEdges(nodes, id, gc);
-    ABSL_RAW_LOG(FATAL, "edges->size() %zu  count %d", edges->size(), count);
-  }
-}
-
-static void CheckInvariants(const GraphCycles &gc) {
-  if (ABSL_PREDICT_FALSE(!gc.CheckInvariants()))
-    ABSL_RAW_LOG(FATAL, "CheckInvariants");
-}
-
-// Returns the index of a randomly chosen node in *nodes.
-// Requires *nodes be non-empty.
-static int RandomNode(RandomEngine* rng, Nodes *nodes) {
-  std::uniform_int_distribution<int> uniform(0, nodes->size()-1);
-  return uniform(*rng);
-}
-
-// Returns the index of a randomly chosen edge in *edges.
-// Requires *edges be non-empty.
-static int RandomEdge(RandomEngine* rng, Edges *edges) {
-  std::uniform_int_distribution<int> uniform(0, edges->size()-1);
-  return uniform(*rng);
-}
-
-// Returns the index of edge (from, to) in *edges or -1 if it is not in *edges.
-static int EdgeIndex(Edges *edges, int from, int to) {
-  int i = 0;
-  while (i != edges->size() &&
-         ((*edges)[i].from != from || (*edges)[i].to != to)) {
-    i++;
-  }
-  return i == edges->size()? -1 : i;
-}
-
-TEST(GraphCycles, RandomizedTest) {
-  int next_node = 0;
-  Nodes nodes;
-  Edges edges;   // from, to
-  IdMap id;
-  GraphCycles graph_cycles;
-  static const int kMaxNodes = 7;  // use <= 7 nodes to keep test short
-  static const int kDataOffset = 17;  // an offset to the node-specific data
-  int n = 100000;
-  int op = 0;
-  RandomEngine rng(testing::UnitTest::GetInstance()->random_seed());
-  std::uniform_int_distribution<int> uniform(0, 5);
-
-  auto ptr = [](intptr_t i) {
-    return reinterpret_cast<void*>(i + kDataOffset);
-  };
-
-  for (int iter = 0; iter != n; iter++) {
-    for (const auto &node : nodes) {
-      ASSERT_EQ(graph_cycles.Ptr(Get(id, node)), ptr(node)) << " node " << node;
-    }
-    CheckEdges(&nodes, &edges, id, &graph_cycles);
-    CheckTransitiveClosure(&nodes, &edges, id, &graph_cycles);
-    op = uniform(rng);
-    switch (op) {
-    case 0:     // Add a node
-      if (nodes.size() < kMaxNodes) {
-        int new_node = next_node++;
-        GraphId new_gnode = graph_cycles.GetId(ptr(new_node));
-        ASSERT_NE(new_gnode, InvalidGraphId());
-        id[new_node] = new_gnode;
-        ASSERT_EQ(ptr(new_node), graph_cycles.Ptr(new_gnode));
-        nodes.push_back(new_node);
-      }
-      break;
-
-    case 1:    // Remove a node
-      if (nodes.size() > 0) {
-        int node_index = RandomNode(&rng, &nodes);
-        int node = nodes[node_index];
-        nodes[node_index] = nodes.back();
-        nodes.pop_back();
-        graph_cycles.RemoveNode(ptr(node));
-        ASSERT_EQ(graph_cycles.Ptr(Get(id, node)), nullptr);
-        id.erase(node);
-        int i = 0;
-        while (i != edges.size()) {
-          if (edges[i].from == node || edges[i].to == node) {
-            edges[i] = edges.back();
-            edges.pop_back();
-          } else {
-            i++;
-          }
-        }
-      }
-      break;
-
-    case 2:   // Add an edge
-      if (nodes.size() > 0) {
-        int from = RandomNode(&rng, &nodes);
-        int to = RandomNode(&rng, &nodes);
-        if (EdgeIndex(&edges, nodes[from], nodes[to]) == -1) {
-          if (graph_cycles.InsertEdge(id[nodes[from]], id[nodes[to]])) {
-            Edge new_edge;
-            new_edge.from = nodes[from];
-            new_edge.to = nodes[to];
-            edges.push_back(new_edge);
-          } else {
-            std::unordered_set<int> seen;
-            ASSERT_TRUE(IsReachable(&edges, nodes[to], nodes[from], &seen))
-                << "Edge " << nodes[to] << "->" << nodes[from];
-          }
-        }
-      }
-      break;
-
-    case 3:    // Remove an edge
-      if (edges.size() > 0) {
-        int i = RandomEdge(&rng, &edges);
-        int from = edges[i].from;
-        int to = edges[i].to;
-        ASSERT_EQ(i, EdgeIndex(&edges, from, to));
-        edges[i] = edges.back();
-        edges.pop_back();
-        ASSERT_EQ(-1, EdgeIndex(&edges, from, to));
-        graph_cycles.RemoveEdge(id[from], id[to]);
-      }
-      break;
-
-    case 4:   // Check a path
-      if (nodes.size() > 0) {
-        int from = RandomNode(&rng, &nodes);
-        int to = RandomNode(&rng, &nodes);
-        GraphId path[2*kMaxNodes];
-        int path_len = graph_cycles.FindPath(id[nodes[from]], id[nodes[to]],
-                                             ABSL_ARRAYSIZE(path), path);
-        std::unordered_set<int> seen;
-        bool reachable = IsReachable(&edges, nodes[from], nodes[to], &seen);
-        bool gc_reachable =
-            graph_cycles.IsReachable(Get(id, nodes[from]), Get(id, nodes[to]));
-        ASSERT_EQ(path_len != 0, reachable);
-        ASSERT_EQ(path_len != 0, gc_reachable);
-        // In the following line, we add one because a node can appear
-        // twice, if the path is from that node to itself, perhaps via
-        // every other node.
-        ASSERT_LE(path_len, kMaxNodes + 1);
-        if (path_len != 0) {
-          ASSERT_EQ(id[nodes[from]], path[0]);
-          ASSERT_EQ(id[nodes[to]], path[path_len-1]);
-          for (int i = 1; i < path_len; i++) {
-            ASSERT_TRUE(graph_cycles.HasEdge(path[i-1], path[i]));
-          }
-        }
-      }
-      break;
-
-    case 5:  // Check invariants
-      CheckInvariants(graph_cycles);
-      break;
-
-    default:
-      ABSL_RAW_LOG(FATAL, "op %d", op);
-    }
-
-    // Very rarely, test graph expansion by adding then removing many nodes.
-    std::bernoulli_distribution one_in_1024(1.0 / 1024);
-    if (one_in_1024(rng)) {
-      CheckEdges(&nodes, &edges, id, &graph_cycles);
-      CheckTransitiveClosure(&nodes, &edges, id, &graph_cycles);
-      for (int i = 0; i != 256; i++) {
-        int new_node = next_node++;
-        GraphId new_gnode = graph_cycles.GetId(ptr(new_node));
-        ASSERT_NE(InvalidGraphId(), new_gnode);
-        id[new_node] = new_gnode;
-        ASSERT_EQ(ptr(new_node), graph_cycles.Ptr(new_gnode));
-        for (const auto &node : nodes) {
-          ASSERT_NE(node, new_node);
-        }
-        nodes.push_back(new_node);
-      }
-      for (int i = 0; i != 256; i++) {
-        ASSERT_GT(nodes.size(), 0);
-        int node_index = RandomNode(&rng, &nodes);
-        int node = nodes[node_index];
-        nodes[node_index] = nodes.back();
-        nodes.pop_back();
-        graph_cycles.RemoveNode(ptr(node));
-        id.erase(node);
-        int j = 0;
-        while (j != edges.size()) {
-          if (edges[j].from == node || edges[j].to == node) {
-            edges[j] = edges.back();
-            edges.pop_back();
-          } else {
-            j++;
-          }
-        }
-      }
-      CheckInvariants(graph_cycles);
-    }
-  }
-}
-
-class GraphCyclesTest : public ::testing::Test {
- public:
-  IdMap id_;
-  GraphCycles g_;
-
-  static void* Ptr(int i) {
-    return reinterpret_cast<void*>(static_cast<uintptr_t>(i));
-  }
-
-  static int Num(void* ptr) {
-    return static_cast<int>(reinterpret_cast<uintptr_t>(ptr));
-  }
-
-  // Test relies on ith NewNode() call returning Node numbered i
-  GraphCyclesTest() {
-    for (int i = 0; i < 100; i++) {
-      id_[i] = g_.GetId(Ptr(i));
-    }
-    CheckInvariants(g_);
-  }
-
-  bool AddEdge(int x, int y) {
-    return g_.InsertEdge(Get(id_, x), Get(id_, y));
-  }
-
-  void AddMultiples() {
-    // For every node x > 0: add edge to 2*x, 3*x
-    for (int x = 1; x < 25; x++) {
-      EXPECT_TRUE(AddEdge(x, 2*x)) << x;
-      EXPECT_TRUE(AddEdge(x, 3*x)) << x;
-    }
-    CheckInvariants(g_);
-  }
-
-  std::string Path(int x, int y) {
-    GraphId path[5];
-    int np = g_.FindPath(Get(id_, x), Get(id_, y), ABSL_ARRAYSIZE(path), path);
-    std::string result;
-    for (int i = 0; i < np; i++) {
-      if (i >= ABSL_ARRAYSIZE(path)) {
-        result += " ...";
-        break;
-      }
-      if (!result.empty()) result.push_back(' ');
-      char buf[20];
-      snprintf(buf, sizeof(buf), "%d", Num(g_.Ptr(path[i])));
-      result += buf;
-    }
-    return result;
-  }
-};
-
-TEST_F(GraphCyclesTest, NoCycle) {
-  AddMultiples();
-  CheckInvariants(g_);
-}
-
-TEST_F(GraphCyclesTest, SimpleCycle) {
-  AddMultiples();
-  EXPECT_FALSE(AddEdge(8, 4));
-  EXPECT_EQ("4 8", Path(4, 8));
-  CheckInvariants(g_);
-}
-
-TEST_F(GraphCyclesTest, IndirectCycle) {
-  AddMultiples();
-  EXPECT_TRUE(AddEdge(16, 9));
-  CheckInvariants(g_);
-  EXPECT_FALSE(AddEdge(9, 2));
-  EXPECT_EQ("2 4 8 16 9", Path(2, 9));
-  CheckInvariants(g_);
-}
-
-TEST_F(GraphCyclesTest, LongPath) {
-  ASSERT_TRUE(AddEdge(2, 4));
-  ASSERT_TRUE(AddEdge(4, 6));
-  ASSERT_TRUE(AddEdge(6, 8));
-  ASSERT_TRUE(AddEdge(8, 10));
-  ASSERT_TRUE(AddEdge(10, 12));
-  ASSERT_FALSE(AddEdge(12, 2));
-  EXPECT_EQ("2 4 6 8 10 ...", Path(2, 12));
-  CheckInvariants(g_);
-}
-
-TEST_F(GraphCyclesTest, RemoveNode) {
-  ASSERT_TRUE(AddEdge(1, 2));
-  ASSERT_TRUE(AddEdge(2, 3));
-  ASSERT_TRUE(AddEdge(3, 4));
-  ASSERT_TRUE(AddEdge(4, 5));
-  g_.RemoveNode(g_.Ptr(id_[3]));
-  id_.erase(3);
-  ASSERT_TRUE(AddEdge(5, 1));
-}
-
-TEST_F(GraphCyclesTest, ManyEdges) {
-  const int N = 50;
-  for (int i = 0; i < N; i++) {
-    for (int j = 1; j < N; j++) {
-      ASSERT_TRUE(AddEdge(i, i+j));
-    }
-  }
-  CheckInvariants(g_);
-  ASSERT_TRUE(AddEdge(2*N-1, 0));
-  CheckInvariants(g_);
-  ASSERT_FALSE(AddEdge(10, 9));
-  CheckInvariants(g_);
-}
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/internal/kernel_timeout.h b/third_party/abseil/absl/synchronization/internal/kernel_timeout.h
deleted file mode 100644
index bbd4d2d..0000000
--- a/third_party/abseil/absl/synchronization/internal/kernel_timeout.h
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// An optional absolute timeout, with nanosecond granularity,
-// compatible with absl::Time. Suitable for in-register
-// parameter-passing (e.g. syscalls.)
-// Constructible from a absl::Time (for a timeout to be respected) or {}
-// (for "no timeout".)
-// This is a private low-level API for use by a handful of low-level
-// components that are friends of this class. Higher-level components
-// should build APIs based on absl::Time and absl::Duration.
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_KERNEL_TIMEOUT_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_KERNEL_TIMEOUT_H_
-
-#include <time.h>
-
-#include <algorithm>
-#include <limits>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-class Futex;
-class Waiter;
-
-class KernelTimeout {
- public:
-  // A timeout that should expire at <t>.  Any value, in the full
-  // InfinitePast() to InfiniteFuture() range, is valid here and will be
-  // respected.
-  explicit KernelTimeout(absl::Time t) : ns_(MakeNs(t)) {}
-  // No timeout.
-  KernelTimeout() : ns_(0) {}
-
-  // A more explicit factory for those who prefer it.  Equivalent to {}.
-  static KernelTimeout Never() { return {}; }
-
-  // We explicitly do not support other custom formats: timespec, int64_t nanos.
-  // Unify on this and absl::Time, please.
-
-  bool has_timeout() const { return ns_ != 0; }
-
-  // Convert to parameter for sem_timedwait/futex/similar.  Only for approved
-  // users.  Do not call if !has_timeout.
-  struct timespec MakeAbsTimespec();
-
- private:
-  // internal rep, not user visible: ns after unix epoch.
-  // zero = no timeout.
-  // Negative we treat as an unlikely (and certainly expired!) but valid
-  // timeout.
-  int64_t ns_;
-
-  static int64_t MakeNs(absl::Time t) {
-    // optimization--InfiniteFuture is common "no timeout" value
-    // and cheaper to compare than convert.
-    if (t == absl::InfiniteFuture()) return 0;
-    int64_t x = ToUnixNanos(t);
-
-    // A timeout that lands exactly on the epoch (x=0) needs to be respected,
-    // so we alter it unnoticably to 1.  Negative timeouts are in
-    // theory supported, but handled poorly by the kernel (long
-    // delays) so push them forward too; since all such times have
-    // already passed, it's indistinguishable.
-    if (x <= 0) x = 1;
-    // A time larger than what can be represented to the kernel is treated
-    // as no timeout.
-    if (x == (std::numeric_limits<int64_t>::max)()) x = 0;
-    return x;
-  }
-
-#ifdef _WIN32
-  // Converts to milliseconds from now, or INFINITE when
-  // !has_timeout(). For use by SleepConditionVariableSRW on
-  // Windows. Callers should recognize that the return value is a
-  // relative duration (it should be recomputed by calling this method
-  // in the case of a spurious wakeup).
-  // This header file may be included transitively by public header files,
-  // so we define our own DWORD and INFINITE instead of getting them from
-  // <intsafe.h> and <WinBase.h>.
-  typedef unsigned long DWord;  // NOLINT
-  DWord InMillisecondsFromNow() const {
-    constexpr DWord kInfinite = (std::numeric_limits<DWord>::max)();
-    if (!has_timeout()) {
-      return kInfinite;
-    }
-    // The use of absl::Now() to convert from absolute time to
-    // relative time means that absl::Now() cannot use anything that
-    // depends on KernelTimeout (for example, Mutex) on Windows.
-    int64_t now = ToUnixNanos(absl::Now());
-    if (ns_ >= now) {
-      // Round up so that Now() + ms_from_now >= ns_.
-      constexpr uint64_t max_nanos =
-          (std::numeric_limits<int64_t>::max)() - 999999u;
-      uint64_t ms_from_now =
-          (std::min<uint64_t>(max_nanos, ns_ - now) + 999999u) / 1000000u;
-      if (ms_from_now > kInfinite) {
-        return kInfinite;
-      }
-      return static_cast<DWord>(ms_from_now);
-    }
-    return 0;
-  }
-#endif
-
-  friend class Futex;
-  friend class Waiter;
-};
-
-inline struct timespec KernelTimeout::MakeAbsTimespec() {
-  int64_t n = ns_;
-  static const int64_t kNanosPerSecond = 1000 * 1000 * 1000;
-  if (n == 0) {
-    ABSL_RAW_LOG(
-        ERROR, "Tried to create a timespec from a non-timeout; never do this.");
-    // But we'll try to continue sanely.  no-timeout ~= saturated timeout.
-    n = (std::numeric_limits<int64_t>::max)();
-  }
-
-  // Kernel APIs validate timespecs as being at or after the epoch,
-  // despite the kernel time type being signed.  However, no one can
-  // tell the difference between a timeout at or before the epoch (since
-  // all such timeouts have expired!)
-  if (n < 0) n = 0;
-
-  struct timespec abstime;
-  int64_t seconds = (std::min)(n / kNanosPerSecond,
-                               int64_t{(std::numeric_limits<time_t>::max)()});
-  abstime.tv_sec = static_cast<time_t>(seconds);
-  abstime.tv_nsec = static_cast<decltype(abstime.tv_nsec)>(n % kNanosPerSecond);
-  return abstime;
-}
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_SYNCHRONIZATION_INTERNAL_KERNEL_TIMEOUT_H_
diff --git a/third_party/abseil/absl/synchronization/internal/per_thread_sem.cc b/third_party/abseil/absl/synchronization/internal/per_thread_sem.cc
deleted file mode 100644
index 821ca9b..0000000
--- a/third_party/abseil/absl/synchronization/internal/per_thread_sem.cc
+++ /dev/null
@@ -1,106 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This file is a no-op if the required LowLevelAlloc support is missing.
-#include "absl/base/internal/low_level_alloc.h"
-#ifndef ABSL_LOW_LEVEL_ALLOC_MISSING
-
-#include "absl/synchronization/internal/per_thread_sem.h"
-
-#include <atomic>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/synchronization/internal/waiter.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-void PerThreadSem::SetThreadBlockedCounter(std::atomic<int> *counter) {
-  base_internal::ThreadIdentity *identity;
-  identity = GetOrCreateCurrentThreadIdentity();
-  identity->blocked_count_ptr = counter;
-}
-
-std::atomic<int> *PerThreadSem::GetThreadBlockedCounter() {
-  base_internal::ThreadIdentity *identity;
-  identity = GetOrCreateCurrentThreadIdentity();
-  return identity->blocked_count_ptr;
-}
-
-void PerThreadSem::Init(base_internal::ThreadIdentity *identity) {
-  new (Waiter::GetWaiter(identity)) Waiter();
-  identity->ticker.store(0, std::memory_order_relaxed);
-  identity->wait_start.store(0, std::memory_order_relaxed);
-  identity->is_idle.store(false, std::memory_order_relaxed);
-}
-
-void PerThreadSem::Destroy(base_internal::ThreadIdentity *identity) {
-  Waiter::GetWaiter(identity)->~Waiter();
-}
-
-void PerThreadSem::Tick(base_internal::ThreadIdentity *identity) {
-  const int ticker =
-      identity->ticker.fetch_add(1, std::memory_order_relaxed) + 1;
-  const int wait_start = identity->wait_start.load(std::memory_order_relaxed);
-  const bool is_idle = identity->is_idle.load(std::memory_order_relaxed);
-  if (wait_start && (ticker - wait_start > Waiter::kIdlePeriods) && !is_idle) {
-    // Wakeup the waiting thread since it is time for it to become idle.
-    Waiter::GetWaiter(identity)->Poke();
-  }
-}
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-extern "C" {
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalPerThreadSemPost(
-    absl::base_internal::ThreadIdentity *identity) {
-  absl::synchronization_internal::Waiter::GetWaiter(identity)->Post();
-}
-
-ABSL_ATTRIBUTE_WEAK bool AbslInternalPerThreadSemWait(
-    absl::synchronization_internal::KernelTimeout t) {
-  bool timeout = false;
-  absl::base_internal::ThreadIdentity *identity;
-  identity = absl::synchronization_internal::GetOrCreateCurrentThreadIdentity();
-
-  // Ensure wait_start != 0.
-  int ticker = identity->ticker.load(std::memory_order_relaxed);
-  identity->wait_start.store(ticker ? ticker : 1, std::memory_order_relaxed);
-  identity->is_idle.store(false, std::memory_order_relaxed);
-
-  if (identity->blocked_count_ptr != nullptr) {
-    // Increment count of threads blocked in a given thread pool.
-    identity->blocked_count_ptr->fetch_add(1, std::memory_order_relaxed);
-  }
-
-  timeout =
-      !absl::synchronization_internal::Waiter::GetWaiter(identity)->Wait(t);
-
-  if (identity->blocked_count_ptr != nullptr) {
-    identity->blocked_count_ptr->fetch_sub(1, std::memory_order_relaxed);
-  }
-
-  identity->is_idle.store(false, std::memory_order_relaxed);
-  identity->wait_start.store(0, std::memory_order_relaxed);
-  return !timeout;
-}
-
-}  // extern "C"
-
-#endif  // ABSL_LOW_LEVEL_ALLOC_MISSING
diff --git a/third_party/abseil/absl/synchronization/internal/per_thread_sem.h b/third_party/abseil/absl/synchronization/internal/per_thread_sem.h
deleted file mode 100644
index 2228b6e..0000000
--- a/third_party/abseil/absl/synchronization/internal/per_thread_sem.h
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// PerThreadSem is a low-level synchronization primitive controlling the
-// runnability of a single thread, used internally by Mutex and CondVar.
-//
-// This is NOT a general-purpose synchronization mechanism, and should not be
-// used directly by applications.  Applications should use Mutex and CondVar.
-//
-// The semantics of PerThreadSem are the same as that of a counting semaphore.
-// Each thread maintains an abstract "count" value associated with its identity.
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_PER_THREAD_SEM_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_PER_THREAD_SEM_H_
-
-#include <atomic>
-
-#include "absl/base/internal/thread_identity.h"
-#include "absl/synchronization/internal/create_thread_identity.h"
-#include "absl/synchronization/internal/kernel_timeout.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class Mutex;
-
-namespace synchronization_internal {
-
-class PerThreadSem {
- public:
-  PerThreadSem() = delete;
-  PerThreadSem(const PerThreadSem&) = delete;
-  PerThreadSem& operator=(const PerThreadSem&) = delete;
-
-  // Routine invoked periodically (once a second) by a background thread.
-  // Has no effect on user-visible state.
-  static void Tick(base_internal::ThreadIdentity* identity);
-
-  // ---------------------------------------------------------------------------
-  // Routines used by autosizing threadpools to detect when threads are
-  // blocked.  Each thread has a counter pointer, initially zero.  If non-zero,
-  // the implementation atomically increments the counter when it blocks on a
-  // semaphore, a decrements it again when it wakes.  This allows a threadpool
-  // to keep track of how many of its threads are blocked.
-  // SetThreadBlockedCounter() should be used only by threadpool
-  // implementations.  GetThreadBlockedCounter() should be used by modules that
-  // block threads; if the pointer returned is non-zero, the location should be
-  // incremented before the thread blocks, and decremented after it wakes.
-  static void SetThreadBlockedCounter(std::atomic<int> *counter);
-  static std::atomic<int> *GetThreadBlockedCounter();
-
- private:
-  // Create the PerThreadSem associated with "identity".  Initializes count=0.
-  // REQUIRES: May only be called by ThreadIdentity.
-  static void Init(base_internal::ThreadIdentity* identity);
-
-  // Destroy the PerThreadSem associated with "identity".
-  // REQUIRES: May only be called by ThreadIdentity.
-  static void Destroy(base_internal::ThreadIdentity* identity);
-
-  // Increments "identity"'s count.
-  static inline void Post(base_internal::ThreadIdentity* identity);
-
-  // Waits until either our count > 0 or t has expired.
-  // If count > 0, decrements count and returns true.  Otherwise returns false.
-  // !t.has_timeout() => Wait(t) will return true.
-  static inline bool Wait(KernelTimeout t);
-
-  // Permitted callers.
-  friend class PerThreadSemTest;
-  friend class absl::Mutex;
-  friend absl::base_internal::ThreadIdentity* CreateThreadIdentity();
-  friend void ReclaimThreadIdentity(void* v);
-};
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// In some build configurations we pass --detect-odr-violations to the
-// gold linker.  This causes it to flag weak symbol overrides as ODR
-// violations.  Because ODR only applies to C++ and not C,
-// --detect-odr-violations ignores symbols not mangled with C++ names.
-// By changing our extension points to be extern "C", we dodge this
-// check.
-extern "C" {
-void AbslInternalPerThreadSemPost(
-    absl::base_internal::ThreadIdentity* identity);
-bool AbslInternalPerThreadSemWait(
-    absl::synchronization_internal::KernelTimeout t);
-}  // extern "C"
-
-void absl::synchronization_internal::PerThreadSem::Post(
-    absl::base_internal::ThreadIdentity* identity) {
-  AbslInternalPerThreadSemPost(identity);
-}
-
-bool absl::synchronization_internal::PerThreadSem::Wait(
-    absl::synchronization_internal::KernelTimeout t) {
-  return AbslInternalPerThreadSemWait(t);
-}
-
-#endif  // ABSL_SYNCHRONIZATION_INTERNAL_PER_THREAD_SEM_H_
diff --git a/third_party/abseil/absl/synchronization/internal/per_thread_sem_test.cc b/third_party/abseil/absl/synchronization/internal/per_thread_sem_test.cc
deleted file mode 100644
index 8cf59e6..0000000
--- a/third_party/abseil/absl/synchronization/internal/per_thread_sem_test.cc
+++ /dev/null
@@ -1,181 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/internal/per_thread_sem.h"
-
-#include <atomic>
-#include <condition_variable>  // NOLINT(build/c++11)
-#include <functional>
-#include <limits>
-#include <mutex>               // NOLINT(build/c++11)
-#include <string>
-#include <thread>              // NOLINT(build/c++11)
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/cycleclock.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/strings/str_cat.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-
-// In this test we explicitly avoid the use of synchronization
-// primitives which might use PerThreadSem, most notably absl::Mutex.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-class SimpleSemaphore {
- public:
-  SimpleSemaphore() : count_(0) {}
-
-  // Decrements (locks) the semaphore. If the semaphore's value is
-  // greater than zero, then the decrement proceeds, and the function
-  // returns, immediately. If the semaphore currently has the value
-  // zero, then the call blocks until it becomes possible to perform
-  // the decrement.
-  void Wait() {
-    std::unique_lock<std::mutex> lock(mu_);
-    cv_.wait(lock, [this]() { return count_ > 0; });
-    --count_;
-    cv_.notify_one();
-  }
-
-  // Increments (unlocks) the semaphore. If the semaphore's value
-  // consequently becomes greater than zero, then another thread
-  // blocked Wait() call will be woken up and proceed to lock the
-  // semaphore.
-  void Post() {
-    std::lock_guard<std::mutex> lock(mu_);
-    ++count_;
-    cv_.notify_one();
-  }
-
- private:
-  std::mutex mu_;
-  std::condition_variable cv_;
-  int count_;
-};
-
-struct ThreadData {
-  int num_iterations;                 // Number of replies to send.
-  SimpleSemaphore identity2_written;  // Posted by thread writing identity2.
-  base_internal::ThreadIdentity *identity1;  // First Post()-er.
-  base_internal::ThreadIdentity *identity2;  // First Wait()-er.
-  KernelTimeout timeout;
-};
-
-// Need friendship with PerThreadSem.
-class PerThreadSemTest : public testing::Test {
- public:
-  static void TimingThread(ThreadData* t) {
-    t->identity2 = GetOrCreateCurrentThreadIdentity();
-    t->identity2_written.Post();
-    while (t->num_iterations--) {
-      Wait(t->timeout);
-      Post(t->identity1);
-    }
-  }
-
-  void TestTiming(const char *msg, bool timeout) {
-    static const int kNumIterations = 100;
-    ThreadData t;
-    t.num_iterations = kNumIterations;
-    t.timeout = timeout ?
-        KernelTimeout(absl::Now() + absl::Seconds(10000))  // far in the future
-        : KernelTimeout::Never();
-    t.identity1 = GetOrCreateCurrentThreadIdentity();
-
-    // We can't use the Thread class here because it uses the Mutex
-    // class which will invoke PerThreadSem, so we use std::thread instead.
-    std::thread partner_thread(std::bind(TimingThread, &t));
-
-    // Wait for our partner thread to register their identity.
-    t.identity2_written.Wait();
-
-    int64_t min_cycles = std::numeric_limits<int64_t>::max();
-    int64_t total_cycles = 0;
-    for (int i = 0; i < kNumIterations; ++i) {
-      absl::SleepFor(absl::Milliseconds(20));
-      int64_t cycles = base_internal::CycleClock::Now();
-      Post(t.identity2);
-      Wait(t.timeout);
-      cycles = base_internal::CycleClock::Now() - cycles;
-      min_cycles = std::min(min_cycles, cycles);
-      total_cycles += cycles;
-    }
-    std::string out = StrCat(
-        msg, "min cycle count=", min_cycles, " avg cycle count=",
-        absl::SixDigits(static_cast<double>(total_cycles) / kNumIterations));
-    printf("%s\n", out.c_str());
-
-    partner_thread.join();
-  }
-
- protected:
-  static void Post(base_internal::ThreadIdentity *id) {
-    PerThreadSem::Post(id);
-  }
-  static bool Wait(KernelTimeout t) {
-    return PerThreadSem::Wait(t);
-  }
-
-  // convenience overload
-  static bool Wait(absl::Time t) {
-    return Wait(KernelTimeout(t));
-  }
-
-  static void Tick(base_internal::ThreadIdentity *identity) {
-    PerThreadSem::Tick(identity);
-  }
-};
-
-namespace {
-
-TEST_F(PerThreadSemTest, WithoutTimeout) {
-  PerThreadSemTest::TestTiming("Without timeout: ", false);
-}
-
-TEST_F(PerThreadSemTest, WithTimeout) {
-  PerThreadSemTest::TestTiming("With timeout:    ", true);
-}
-
-TEST_F(PerThreadSemTest, Timeouts) {
-  const absl::Duration delay = absl::Milliseconds(50);
-  const absl::Time start = absl::Now();
-  EXPECT_FALSE(Wait(start + delay));
-  const absl::Duration elapsed = absl::Now() - start;
-  // Allow for a slight early return, to account for quality of implementation
-  // issues on various platforms.
-  const absl::Duration slop = absl::Microseconds(200);
-  EXPECT_LE(delay - slop, elapsed)
-      << "Wait returned " << delay - elapsed
-      << " early (with " << slop << " slop), start time was " << start;
-
-  absl::Time negative_timeout = absl::UnixEpoch() - absl::Milliseconds(100);
-  EXPECT_FALSE(Wait(negative_timeout));
-  EXPECT_LE(negative_timeout, absl::Now() + slop);  // trivially true :)
-
-  Post(GetOrCreateCurrentThreadIdentity());
-  // The wait here has an expired timeout, but we have a wake to consume,
-  // so this should succeed
-  EXPECT_TRUE(Wait(negative_timeout));
-}
-
-}  // namespace
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/internal/thread_pool.h b/third_party/abseil/absl/synchronization/internal/thread_pool.h
deleted file mode 100644
index 0cb96da..0000000
--- a/third_party/abseil/absl/synchronization/internal/thread_pool.h
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_THREAD_POOL_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_THREAD_POOL_H_
-
-#include <cassert>
-#include <cstddef>
-#include <functional>
-#include <queue>
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// A simple ThreadPool implementation for tests.
-class ThreadPool {
- public:
-  explicit ThreadPool(int num_threads) {
-    for (int i = 0; i < num_threads; ++i) {
-      threads_.push_back(std::thread(&ThreadPool::WorkLoop, this));
-    }
-  }
-
-  ThreadPool(const ThreadPool &) = delete;
-  ThreadPool &operator=(const ThreadPool &) = delete;
-
-  ~ThreadPool() {
-    {
-      absl::MutexLock l(&mu_);
-      for (size_t i = 0; i < threads_.size(); i++) {
-        queue_.push(nullptr);  // Shutdown signal.
-      }
-    }
-    for (auto &t : threads_) {
-      t.join();
-    }
-  }
-
-  // Schedule a function to be run on a ThreadPool thread immediately.
-  void Schedule(std::function<void()> func) {
-    assert(func != nullptr);
-    absl::MutexLock l(&mu_);
-    queue_.push(std::move(func));
-  }
-
- private:
-  bool WorkAvailable() const ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_) {
-    return !queue_.empty();
-  }
-
-  void WorkLoop() {
-    while (true) {
-      std::function<void()> func;
-      {
-        absl::MutexLock l(&mu_);
-        mu_.Await(absl::Condition(this, &ThreadPool::WorkAvailable));
-        func = std::move(queue_.front());
-        queue_.pop();
-      }
-      if (func == nullptr) {  // Shutdown signal.
-        break;
-      }
-      func();
-    }
-  }
-
-  absl::Mutex mu_;
-  std::queue<std::function<void()>> queue_ ABSL_GUARDED_BY(mu_);
-  std::vector<std::thread> threads_;
-};
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_SYNCHRONIZATION_INTERNAL_THREAD_POOL_H_
diff --git a/third_party/abseil/absl/synchronization/internal/waiter.cc b/third_party/abseil/absl/synchronization/internal/waiter.cc
deleted file mode 100644
index 2123be6..0000000
--- a/third_party/abseil/absl/synchronization/internal/waiter.cc
+++ /dev/null
@@ -1,428 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/internal/waiter.h"
-
-#include "absl/base/config.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#else
-#include <pthread.h>
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#ifdef __linux__
-#include <linux/futex.h>
-#include <sys/syscall.h>
-#endif
-
-#ifdef ABSL_HAVE_SEMAPHORE_H
-#include <semaphore.h>
-#endif
-
-#include <errno.h>
-#include <stdio.h>
-#include <time.h>
-
-#include <atomic>
-#include <cassert>
-#include <cstdint>
-#include <new>
-#include <type_traits>
-
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/base/optimization.h"
-#include "absl/synchronization/internal/kernel_timeout.h"
-
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-static void MaybeBecomeIdle() {
-  base_internal::ThreadIdentity *identity =
-      base_internal::CurrentThreadIdentityIfPresent();
-  assert(identity != nullptr);
-  const bool is_idle = identity->is_idle.load(std::memory_order_relaxed);
-  const int ticker = identity->ticker.load(std::memory_order_relaxed);
-  const int wait_start = identity->wait_start.load(std::memory_order_relaxed);
-  if (!is_idle && ticker - wait_start > Waiter::kIdlePeriods) {
-    identity->is_idle.store(true, std::memory_order_relaxed);
-  }
-}
-
-#if ABSL_WAITER_MODE == ABSL_WAITER_MODE_FUTEX
-
-Waiter::Waiter() {
-  futex_.store(0, std::memory_order_relaxed);
-}
-
-Waiter::~Waiter() = default;
-
-bool Waiter::Wait(KernelTimeout t) {
-  // Loop until we can atomically decrement futex from a positive
-  // value, waiting on a futex while we believe it is zero.
-  // Note that, since the thread ticker is just reset, we don't need to check
-  // whether the thread is idle on the very first pass of the loop.
-  bool first_pass = true;
-  while (true) {
-    int32_t x = futex_.load(std::memory_order_relaxed);
-    while (x != 0) {
-      if (!futex_.compare_exchange_weak(x, x - 1,
-                                        std::memory_order_acquire,
-                                        std::memory_order_relaxed)) {
-        continue;  // Raced with someone, retry.
-      }
-      return true;  // Consumed a wakeup, we are done.
-    }
-
-
-    if (!first_pass) MaybeBecomeIdle();
-    const int err = Futex::WaitUntil(&futex_, 0, t);
-    if (err != 0) {
-      if (err == -EINTR || err == -EWOULDBLOCK) {
-        // Do nothing, the loop will retry.
-      } else if (err == -ETIMEDOUT) {
-        return false;
-      } else {
-        ABSL_RAW_LOG(FATAL, "Futex operation failed with error %d\n", err);
-      }
-    }
-    first_pass = false;
-  }
-}
-
-void Waiter::Post() {
-  if (futex_.fetch_add(1, std::memory_order_release) == 0) {
-    // We incremented from 0, need to wake a potential waiter.
-    Poke();
-  }
-}
-
-void Waiter::Poke() {
-  // Wake one thread waiting on the futex.
-  const int err = Futex::Wake(&futex_, 1);
-  if (ABSL_PREDICT_FALSE(err < 0)) {
-    ABSL_RAW_LOG(FATAL, "Futex operation failed with error %d\n", err);
-  }
-}
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_CONDVAR
-
-class PthreadMutexHolder {
- public:
-  explicit PthreadMutexHolder(pthread_mutex_t *mu) : mu_(mu) {
-    const int err = pthread_mutex_lock(mu_);
-    if (err != 0) {
-      ABSL_RAW_LOG(FATAL, "pthread_mutex_lock failed: %d", err);
-    }
-  }
-
-  PthreadMutexHolder(const PthreadMutexHolder &rhs) = delete;
-  PthreadMutexHolder &operator=(const PthreadMutexHolder &rhs) = delete;
-
-  ~PthreadMutexHolder() {
-    const int err = pthread_mutex_unlock(mu_);
-    if (err != 0) {
-      ABSL_RAW_LOG(FATAL, "pthread_mutex_unlock failed: %d", err);
-    }
-  }
-
- private:
-  pthread_mutex_t *mu_;
-};
-
-Waiter::Waiter() {
-  const int err = pthread_mutex_init(&mu_, 0);
-  if (err != 0) {
-    ABSL_RAW_LOG(FATAL, "pthread_mutex_init failed: %d", err);
-  }
-
-  const int err2 = pthread_cond_init(&cv_, 0);
-  if (err2 != 0) {
-    ABSL_RAW_LOG(FATAL, "pthread_cond_init failed: %d", err2);
-  }
-
-  waiter_count_ = 0;
-  wakeup_count_ = 0;
-}
-
-Waiter::~Waiter() {
-  const int err = pthread_mutex_destroy(&mu_);
-  if (err != 0) {
-    ABSL_RAW_LOG(FATAL, "pthread_mutex_destroy failed: %d", err);
-  }
-
-  const int err2 = pthread_cond_destroy(&cv_);
-  if (err2 != 0) {
-    ABSL_RAW_LOG(FATAL, "pthread_cond_destroy failed: %d", err2);
-  }
-}
-
-bool Waiter::Wait(KernelTimeout t) {
-  struct timespec abs_timeout;
-  if (t.has_timeout()) {
-    abs_timeout = t.MakeAbsTimespec();
-  }
-
-  PthreadMutexHolder h(&mu_);
-  ++waiter_count_;
-  // Loop until we find a wakeup to consume or timeout.
-  // Note that, since the thread ticker is just reset, we don't need to check
-  // whether the thread is idle on the very first pass of the loop.
-  bool first_pass = true;
-  while (wakeup_count_ == 0) {
-    if (!first_pass) MaybeBecomeIdle();
-    // No wakeups available, time to wait.
-    if (!t.has_timeout()) {
-      const int err = pthread_cond_wait(&cv_, &mu_);
-      if (err != 0) {
-        ABSL_RAW_LOG(FATAL, "pthread_cond_wait failed: %d", err);
-      }
-    } else {
-      const int err = pthread_cond_timedwait(&cv_, &mu_, &abs_timeout);
-      if (err == ETIMEDOUT) {
-        --waiter_count_;
-        return false;
-      }
-      if (err != 0) {
-        ABSL_RAW_LOG(FATAL, "pthread_cond_timedwait failed: %d", err);
-      }
-    }
-    first_pass = false;
-  }
-  // Consume a wakeup and we're done.
-  --wakeup_count_;
-  --waiter_count_;
-  return true;
-}
-
-void Waiter::Post() {
-  PthreadMutexHolder h(&mu_);
-  ++wakeup_count_;
-  InternalCondVarPoke();
-}
-
-void Waiter::Poke() {
-  PthreadMutexHolder h(&mu_);
-  InternalCondVarPoke();
-}
-
-void Waiter::InternalCondVarPoke() {
-  if (waiter_count_ != 0) {
-    const int err = pthread_cond_signal(&cv_);
-    if (ABSL_PREDICT_FALSE(err != 0)) {
-      ABSL_RAW_LOG(FATAL, "pthread_cond_signal failed: %d", err);
-    }
-  }
-}
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_SEM
-
-Waiter::Waiter() {
-  if (sem_init(&sem_, 0, 0) != 0) {
-    ABSL_RAW_LOG(FATAL, "sem_init failed with errno %d\n", errno);
-  }
-  wakeups_.store(0, std::memory_order_relaxed);
-}
-
-Waiter::~Waiter() {
-  if (sem_destroy(&sem_) != 0) {
-    ABSL_RAW_LOG(FATAL, "sem_destroy failed with errno %d\n", errno);
-  }
-}
-
-bool Waiter::Wait(KernelTimeout t) {
-  struct timespec abs_timeout;
-  if (t.has_timeout()) {
-    abs_timeout = t.MakeAbsTimespec();
-  }
-
-  // Loop until we timeout or consume a wakeup.
-  // Note that, since the thread ticker is just reset, we don't need to check
-  // whether the thread is idle on the very first pass of the loop.
-  bool first_pass = true;
-  while (true) {
-    int x = wakeups_.load(std::memory_order_relaxed);
-    while (x != 0) {
-      if (!wakeups_.compare_exchange_weak(x, x - 1,
-                                          std::memory_order_acquire,
-                                          std::memory_order_relaxed)) {
-        continue;  // Raced with someone, retry.
-      }
-      // Successfully consumed a wakeup, we're done.
-      return true;
-    }
-
-    if (!first_pass) MaybeBecomeIdle();
-    // Nothing to consume, wait (looping on EINTR).
-    while (true) {
-      if (!t.has_timeout()) {
-        if (sem_wait(&sem_) == 0) break;
-        if (errno == EINTR) continue;
-        ABSL_RAW_LOG(FATAL, "sem_wait failed: %d", errno);
-      } else {
-        if (sem_timedwait(&sem_, &abs_timeout) == 0) break;
-        if (errno == EINTR) continue;
-        if (errno == ETIMEDOUT) return false;
-        ABSL_RAW_LOG(FATAL, "sem_timedwait failed: %d", errno);
-      }
-    }
-    first_pass = false;
-  }
-}
-
-void Waiter::Post() {
-  // Post a wakeup.
-  if (wakeups_.fetch_add(1, std::memory_order_release) == 0) {
-    // We incremented from 0, need to wake a potential waiter.
-    Poke();
-  }
-}
-
-void Waiter::Poke() {
-  if (sem_post(&sem_) != 0) {  // Wake any semaphore waiter.
-    ABSL_RAW_LOG(FATAL, "sem_post failed with errno %d\n", errno);
-  }
-}
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_WIN32
-
-class Waiter::WinHelper {
- public:
-  static SRWLOCK *GetLock(Waiter *w) {
-    return reinterpret_cast<SRWLOCK *>(&w->mu_storage_);
-  }
-
-  static CONDITION_VARIABLE *GetCond(Waiter *w) {
-    return reinterpret_cast<CONDITION_VARIABLE *>(&w->cv_storage_);
-  }
-
-  static_assert(sizeof(SRWLOCK) == sizeof(void *),
-                "`mu_storage_` does not have the same size as SRWLOCK");
-  static_assert(alignof(SRWLOCK) == alignof(void *),
-                "`mu_storage_` does not have the same alignment as SRWLOCK");
-
-  static_assert(sizeof(CONDITION_VARIABLE) == sizeof(void *),
-                "`ABSL_CONDITION_VARIABLE_STORAGE` does not have the same size "
-                "as `CONDITION_VARIABLE`");
-  static_assert(
-      alignof(CONDITION_VARIABLE) == alignof(void *),
-      "`cv_storage_` does not have the same alignment as `CONDITION_VARIABLE`");
-
-  // The SRWLOCK and CONDITION_VARIABLE types must be trivially constructible
-  // and destructible because we never call their constructors or destructors.
-  static_assert(std::is_trivially_constructible<SRWLOCK>::value,
-                "The `SRWLOCK` type must be trivially constructible");
-  static_assert(
-      std::is_trivially_constructible<CONDITION_VARIABLE>::value,
-      "The `CONDITION_VARIABLE` type must be trivially constructible");
-  static_assert(std::is_trivially_destructible<SRWLOCK>::value,
-                "The `SRWLOCK` type must be trivially destructible");
-  static_assert(std::is_trivially_destructible<CONDITION_VARIABLE>::value,
-                "The `CONDITION_VARIABLE` type must be trivially destructible");
-};
-
-class LockHolder {
- public:
-  explicit LockHolder(SRWLOCK* mu) : mu_(mu) {
-    AcquireSRWLockExclusive(mu_);
-  }
-
-  LockHolder(const LockHolder&) = delete;
-  LockHolder& operator=(const LockHolder&) = delete;
-
-  ~LockHolder() {
-    ReleaseSRWLockExclusive(mu_);
-  }
-
- private:
-  SRWLOCK* mu_;
-};
-
-Waiter::Waiter() {
-  auto *mu = ::new (static_cast<void *>(&mu_storage_)) SRWLOCK;
-  auto *cv = ::new (static_cast<void *>(&cv_storage_)) CONDITION_VARIABLE;
-  InitializeSRWLock(mu);
-  InitializeConditionVariable(cv);
-  waiter_count_ = 0;
-  wakeup_count_ = 0;
-}
-
-// SRW locks and condition variables do not need to be explicitly destroyed.
-// https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-initializesrwlock
-// https://stackoverflow.com/questions/28975958/why-does-windows-have-no-deleteconditionvariable-function-to-go-together-with
-Waiter::~Waiter() = default;
-
-bool Waiter::Wait(KernelTimeout t) {
-  SRWLOCK *mu = WinHelper::GetLock(this);
-  CONDITION_VARIABLE *cv = WinHelper::GetCond(this);
-
-  LockHolder h(mu);
-  ++waiter_count_;
-
-  // Loop until we find a wakeup to consume or timeout.
-  // Note that, since the thread ticker is just reset, we don't need to check
-  // whether the thread is idle on the very first pass of the loop.
-  bool first_pass = true;
-  while (wakeup_count_ == 0) {
-    if (!first_pass) MaybeBecomeIdle();
-    // No wakeups available, time to wait.
-    if (!SleepConditionVariableSRW(cv, mu, t.InMillisecondsFromNow(), 0)) {
-      // GetLastError() returns a Win32 DWORD, but we assign to
-      // unsigned long to simplify the ABSL_RAW_LOG case below.  The uniform
-      // initialization guarantees this is not a narrowing conversion.
-      const unsigned long err{GetLastError()};  // NOLINT(runtime/int)
-      if (err == ERROR_TIMEOUT) {
-        --waiter_count_;
-        return false;
-      } else {
-        ABSL_RAW_LOG(FATAL, "SleepConditionVariableSRW failed: %lu", err);
-      }
-    }
-    first_pass = false;
-  }
-  // Consume a wakeup and we're done.
-  --wakeup_count_;
-  --waiter_count_;
-  return true;
-}
-
-void Waiter::Post() {
-  LockHolder h(WinHelper::GetLock(this));
-  ++wakeup_count_;
-  InternalCondVarPoke();
-}
-
-void Waiter::Poke() {
-  LockHolder h(WinHelper::GetLock(this));
-  InternalCondVarPoke();
-}
-
-void Waiter::InternalCondVarPoke() {
-  if (waiter_count_ != 0) {
-    WakeConditionVariable(WinHelper::GetCond(this));
-  }
-}
-
-#else
-#error Unknown ABSL_WAITER_MODE
-#endif
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/internal/waiter.h b/third_party/abseil/absl/synchronization/internal/waiter.h
deleted file mode 100644
index be3df18..0000000
--- a/third_party/abseil/absl/synchronization/internal/waiter.h
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#ifndef ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
-#define ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
-
-#include "absl/base/config.h"
-
-#ifdef _WIN32
-#include <sdkddkver.h>
-#else
-#include <pthread.h>
-#endif
-
-#ifdef __linux__
-#include <linux/futex.h>
-#endif
-
-#ifdef ABSL_HAVE_SEMAPHORE_H
-#include <semaphore.h>
-#endif
-
-#include <atomic>
-#include <cstdint>
-
-#include "absl/base/internal/thread_identity.h"
-#include "absl/synchronization/internal/futex.h"
-#include "absl/synchronization/internal/kernel_timeout.h"
-
-// May be chosen at compile time via -DABSL_FORCE_WAITER_MODE=<index>
-#define ABSL_WAITER_MODE_FUTEX 0
-#define ABSL_WAITER_MODE_SEM 1
-#define ABSL_WAITER_MODE_CONDVAR 2
-#define ABSL_WAITER_MODE_WIN32 3
-
-#if defined(ABSL_FORCE_WAITER_MODE)
-#define ABSL_WAITER_MODE ABSL_FORCE_WAITER_MODE
-#elif defined(_WIN32) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_WIN32
-#elif defined(ABSL_INTERNAL_HAVE_FUTEX)
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_FUTEX
-#elif defined(ABSL_HAVE_SEMAPHORE_H)
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_SEM
-#else
-#define ABSL_WAITER_MODE ABSL_WAITER_MODE_CONDVAR
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace synchronization_internal {
-
-// Waiter is an OS-specific semaphore.
-class Waiter {
- public:
-  // Prepare any data to track waits.
-  Waiter();
-
-  // Not copyable or movable
-  Waiter(const Waiter&) = delete;
-  Waiter& operator=(const Waiter&) = delete;
-
-  // Destroy any data to track waits.
-  ~Waiter();
-
-  // Blocks the calling thread until a matching call to `Post()` or
-  // `t` has passed. Returns `true` if woken (`Post()` called),
-  // `false` on timeout.
-  bool Wait(KernelTimeout t);
-
-  // Restart the caller of `Wait()` as with a normal semaphore.
-  void Post();
-
-  // If anyone is waiting, wake them up temporarily and cause them to
-  // call `MaybeBecomeIdle()`. They will then return to waiting for a
-  // `Post()` or timeout.
-  void Poke();
-
-  // Returns the Waiter associated with the identity.
-  static Waiter* GetWaiter(base_internal::ThreadIdentity* identity) {
-    static_assert(
-        sizeof(Waiter) <= sizeof(base_internal::ThreadIdentity::WaiterState),
-        "Insufficient space for Waiter");
-    return reinterpret_cast<Waiter*>(identity->waiter_state.data);
-  }
-
-  // How many periods to remain idle before releasing resources
-#ifndef ABSL_HAVE_THREAD_SANITIZER
-  static constexpr int kIdlePeriods = 60;
-#else
-  // Memory consumption under ThreadSanitizer is a serious concern,
-  // so we release resources sooner. The value of 1 leads to 1 to 2 second
-  // delay before marking a thread as idle.
-  static const int kIdlePeriods = 1;
-#endif
-
- private:
-#if ABSL_WAITER_MODE == ABSL_WAITER_MODE_FUTEX
-  // Futexes are defined by specification to be 32-bits.
-  // Thus std::atomic<int32_t> must be just an int32_t with lockfree methods.
-  std::atomic<int32_t> futex_;
-  static_assert(sizeof(int32_t) == sizeof(futex_), "Wrong size for futex");
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_CONDVAR
-  // REQUIRES: mu_ must be held.
-  void InternalCondVarPoke();
-
-  pthread_mutex_t mu_;
-  pthread_cond_t cv_;
-  int waiter_count_;
-  int wakeup_count_;  // Unclaimed wakeups.
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_SEM
-  sem_t sem_;
-  // This seems superfluous, but for Poke() we need to cause spurious
-  // wakeups on the semaphore. Hence we can't actually use the
-  // semaphore's count.
-  std::atomic<int> wakeups_;
-
-#elif ABSL_WAITER_MODE == ABSL_WAITER_MODE_WIN32
-  // WinHelper - Used to define utilities for accessing the lock and
-  // condition variable storage once the types are complete.
-  class WinHelper;
-
-  // REQUIRES: WinHelper::GetLock(this) must be held.
-  void InternalCondVarPoke();
-
-  // We can't include Windows.h in our headers, so we use aligned charachter
-  // buffers to define the storage of SRWLOCK and CONDITION_VARIABLE.
-  alignas(void*) unsigned char mu_storage_[sizeof(void*)];
-  alignas(void*) unsigned char cv_storage_[sizeof(void*)];
-  int waiter_count_;
-  int wakeup_count_;
-
-#else
-  #error Unknown ABSL_WAITER_MODE
-#endif
-};
-
-}  // namespace synchronization_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_SYNCHRONIZATION_INTERNAL_WAITER_H_
diff --git a/third_party/abseil/absl/synchronization/lifetime_test.cc b/third_party/abseil/absl/synchronization/lifetime_test.cc
deleted file mode 100644
index cc973a3..0000000
--- a/third_party/abseil/absl/synchronization/lifetime_test.cc
+++ /dev/null
@@ -1,181 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdlib>
-#include <thread>  // NOLINT(build/c++11), Abseil test
-#include <type_traits>
-
-#include "absl/base/attributes.h"
-#include "absl/base/const_init.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/synchronization/notification.h"
-
-namespace {
-
-// A two-threaded test which checks that Mutex, CondVar, and Notification have
-// correct basic functionality.  The intent is to establish that they
-// function correctly in various phases of construction and destruction.
-//
-// Thread one acquires a lock on 'mutex', wakes thread two via 'notification',
-// then waits for 'state' to be set, as signalled by 'condvar'.
-//
-// Thread two waits on 'notification', then sets 'state' inside the 'mutex',
-// signalling the change via 'condvar'.
-//
-// These tests use ABSL_RAW_CHECK to validate invariants, rather than EXPECT or
-// ASSERT from gUnit, because we need to invoke them during global destructors,
-// when gUnit teardown would have already begun.
-void ThreadOne(absl::Mutex* mutex, absl::CondVar* condvar,
-               absl::Notification* notification, bool* state) {
-  // Test that the notification is in a valid initial state.
-  ABSL_RAW_CHECK(!notification->HasBeenNotified(), "invalid Notification");
-  ABSL_RAW_CHECK(*state == false, "*state not initialized");
-
-  {
-    absl::MutexLock lock(mutex);
-
-    notification->Notify();
-    ABSL_RAW_CHECK(notification->HasBeenNotified(), "invalid Notification");
-
-    while (*state == false) {
-      condvar->Wait(mutex);
-    }
-  }
-}
-
-void ThreadTwo(absl::Mutex* mutex, absl::CondVar* condvar,
-               absl::Notification* notification, bool* state) {
-  ABSL_RAW_CHECK(*state == false, "*state not initialized");
-
-  // Wake thread one
-  notification->WaitForNotification();
-  ABSL_RAW_CHECK(notification->HasBeenNotified(), "invalid Notification");
-  {
-    absl::MutexLock lock(mutex);
-    *state = true;
-    condvar->Signal();
-  }
-}
-
-// Launch thread 1 and thread 2, and block on their completion.
-// If any of 'mutex', 'condvar', or 'notification' is nullptr, use a locally
-// constructed instance instead.
-void RunTests(absl::Mutex* mutex, absl::CondVar* condvar) {
-  absl::Mutex default_mutex;
-  absl::CondVar default_condvar;
-  absl::Notification notification;
-  if (!mutex) {
-    mutex = &default_mutex;
-  }
-  if (!condvar) {
-    condvar = &default_condvar;
-  }
-  bool state = false;
-  std::thread thread_one(ThreadOne, mutex, condvar, &notification, &state);
-  std::thread thread_two(ThreadTwo, mutex, condvar, &notification, &state);
-  thread_one.join();
-  thread_two.join();
-}
-
-void TestLocals() {
-  absl::Mutex mutex;
-  absl::CondVar condvar;
-  RunTests(&mutex, &condvar);
-}
-
-// Normal kConstInit usage
-ABSL_CONST_INIT absl::Mutex const_init_mutex(absl::kConstInit);
-void TestConstInitGlobal() { RunTests(&const_init_mutex, nullptr); }
-
-// Global variables during start and termination
-//
-// In a translation unit, static storage duration variables are initialized in
-// the order of their definitions, and destroyed in the reverse order of their
-// definitions.  We can use this to arrange for tests to be run on these objects
-// before they are created, and after they are destroyed.
-
-using Function = void (*)();
-
-class OnConstruction {
- public:
-  explicit OnConstruction(Function fn) { fn(); }
-};
-
-class OnDestruction {
- public:
-  explicit OnDestruction(Function fn) : fn_(fn) {}
-  ~OnDestruction() { fn_(); }
- private:
-  Function fn_;
-};
-
-// These tests require that the compiler correctly supports C++11 constant
-// initialization... but MSVC has a known regression since v19.10:
-// https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html
-// TODO(epastor): Limit the affected range once MSVC fixes this bug.
-#if defined(__clang__) || !(defined(_MSC_VER) && _MSC_VER > 1900)
-// kConstInit
-// Test early usage.  (Declaration comes first; definitions must appear after
-// the test runner.)
-extern absl::Mutex early_const_init_mutex;
-// (Normally I'd write this +[], to make the cast-to-function-pointer explicit,
-// but in some MSVC setups we support, lambdas provide conversion operators to
-// different flavors of function pointers, making this trick ambiguous.)
-OnConstruction test_early_const_init([] {
-  RunTests(&early_const_init_mutex, nullptr);
-});
-// This definition appears before test_early_const_init, but it should be
-// initialized first (due to constant initialization).  Test that the object
-// actually works when constructed this way.
-ABSL_CONST_INIT absl::Mutex early_const_init_mutex(absl::kConstInit);
-
-// Furthermore, test that the const-init c'tor doesn't stomp over the state of
-// a Mutex.  Really, this is a test that the platform under test correctly
-// supports C++11 constant initialization.  (The constant-initialization
-// constructors of globals "happen at link time"; memory is pre-initialized,
-// before the constructors of either grab_lock or check_still_locked are run.)
-extern absl::Mutex const_init_sanity_mutex;
-OnConstruction grab_lock([]() ABSL_NO_THREAD_SAFETY_ANALYSIS {
-  const_init_sanity_mutex.Lock();
-});
-ABSL_CONST_INIT absl::Mutex const_init_sanity_mutex(absl::kConstInit);
-OnConstruction check_still_locked([]() ABSL_NO_THREAD_SAFETY_ANALYSIS {
-  const_init_sanity_mutex.AssertHeld();
-  const_init_sanity_mutex.Unlock();
-});
-#endif  // defined(__clang__) || !(defined(_MSC_VER) && _MSC_VER > 1900)
-
-// Test shutdown usage.  (Declarations come first; definitions must appear after
-// the test runner.)
-extern absl::Mutex late_const_init_mutex;
-// OnDestruction is being used here as a global variable, even though it has a
-// non-trivial destructor.  This is against the style guide.  We're violating
-// that rule here to check that the exception we allow for kConstInit is safe.
-// NOLINTNEXTLINE
-OnDestruction test_late_const_init([] {
-  RunTests(&late_const_init_mutex, nullptr);
-});
-ABSL_CONST_INIT absl::Mutex late_const_init_mutex(absl::kConstInit);
-
-}  // namespace
-
-int main() {
-  TestLocals();
-  TestConstInitGlobal();
-  // Explicitly call exit(0) here, to make it clear that we intend for the
-  // above global object destructors to run.
-  std::exit(0);
-}
diff --git a/third_party/abseil/absl/synchronization/mutex.cc b/third_party/abseil/absl/synchronization/mutex.cc
deleted file mode 100644
index 9e01393..0000000
--- a/third_party/abseil/absl/synchronization/mutex.cc
+++ /dev/null
@@ -1,2740 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/mutex.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#ifdef ERROR
-#undef ERROR
-#endif
-#else
-#include <fcntl.h>
-#include <pthread.h>
-#include <sched.h>
-#include <sys/time.h>
-#endif
-
-#include <assert.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <algorithm>
-#include <atomic>
-#include <cinttypes>
-#include <thread>  // NOLINT(build/c++11)
-
-#include "absl/base/attributes.h"
-#include "absl/base/call_once.h"
-#include "absl/base/config.h"
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/atomic_hook.h"
-#include "absl/base/internal/cycleclock.h"
-#include "absl/base/internal/hide_ptr.h"
-#include "absl/base/internal/low_level_alloc.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/internal/sysinfo.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/base/internal/tsan_mutex_interface.h"
-#include "absl/base/port.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/synchronization/internal/graphcycles.h"
-#include "absl/synchronization/internal/per_thread_sem.h"
-#include "absl/time/time.h"
-
-using absl::base_internal::CurrentThreadIdentityIfPresent;
-using absl::base_internal::PerThreadSynch;
-using absl::base_internal::SchedulingGuard;
-using absl::base_internal::ThreadIdentity;
-using absl::synchronization_internal::GetOrCreateCurrentThreadIdentity;
-using absl::synchronization_internal::GraphCycles;
-using absl::synchronization_internal::GraphId;
-using absl::synchronization_internal::InvalidGraphId;
-using absl::synchronization_internal::KernelTimeout;
-using absl::synchronization_internal::PerThreadSem;
-
-extern "C" {
-ABSL_ATTRIBUTE_WEAK void AbslInternalMutexYield() { std::this_thread::yield(); }
-}  // extern "C"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-#if defined(ABSL_HAVE_THREAD_SANITIZER)
-constexpr OnDeadlockCycle kDeadlockDetectionDefault = OnDeadlockCycle::kIgnore;
-#else
-constexpr OnDeadlockCycle kDeadlockDetectionDefault = OnDeadlockCycle::kAbort;
-#endif
-
-ABSL_CONST_INIT std::atomic<OnDeadlockCycle> synch_deadlock_detection(
-    kDeadlockDetectionDefault);
-ABSL_CONST_INIT std::atomic<bool> synch_check_invariants(false);
-
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-absl::base_internal::AtomicHook<void (*)(int64_t wait_cycles)>
-    submit_profile_data;
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES absl::base_internal::AtomicHook<void (*)(
-    const char *msg, const void *obj, int64_t wait_cycles)>
-    mutex_tracer;
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
-    absl::base_internal::AtomicHook<void (*)(const char *msg, const void *cv)>
-        cond_var_tracer;
-ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES absl::base_internal::AtomicHook<
-    bool (*)(const void *pc, char *out, int out_size)>
-    symbolizer(absl::Symbolize);
-
-}  // namespace
-
-static inline bool EvalConditionAnnotated(const Condition *cond, Mutex *mu,
-                                          bool locking, bool trylock,
-                                          bool read_lock);
-
-void RegisterMutexProfiler(void (*fn)(int64_t wait_timestamp)) {
-  submit_profile_data.Store(fn);
-}
-
-void RegisterMutexTracer(void (*fn)(const char *msg, const void *obj,
-                                    int64_t wait_cycles)) {
-  mutex_tracer.Store(fn);
-}
-
-void RegisterCondVarTracer(void (*fn)(const char *msg, const void *cv)) {
-  cond_var_tracer.Store(fn);
-}
-
-void RegisterSymbolizer(bool (*fn)(const void *pc, char *out, int out_size)) {
-  symbolizer.Store(fn);
-}
-
-struct ABSL_CACHELINE_ALIGNED MutexGlobals {
-  absl::once_flag once;
-  int num_cpus = 0;
-  int spinloop_iterations = 0;
-};
-
-static const MutexGlobals& GetMutexGlobals() {
-  ABSL_CONST_INIT static MutexGlobals data;
-  absl::base_internal::LowLevelCallOnce(&data.once, [&]() {
-    data.num_cpus = absl::base_internal::NumCPUs();
-    data.spinloop_iterations = data.num_cpus > 1 ? 1500 : 0;
-  });
-  return data;
-}
-
-// Spinlock delay on iteration c.  Returns new c.
-namespace {
-  enum DelayMode { AGGRESSIVE, GENTLE };
-};
-
-namespace synchronization_internal {
-int MutexDelay(int32_t c, int mode) {
-  // If this a uniprocessor, only yield/sleep.  Otherwise, if the mode is
-  // aggressive then spin many times before yielding.  If the mode is
-  // gentle then spin only a few times before yielding.  Aggressive spinning is
-  // used to ensure that an Unlock() call, which  must get the spin lock for
-  // any thread to make progress gets it without undue delay.
-  const int32_t limit =
-      GetMutexGlobals().num_cpus > 1 ? (mode == AGGRESSIVE ? 5000 : 250) : 0;
-  if (c < limit) {
-    // Spin.
-    c++;
-  } else {
-    SchedulingGuard::ScopedEnable enable_rescheduling;
-    ABSL_TSAN_MUTEX_PRE_DIVERT(nullptr, 0);
-    if (c == limit) {
-      // Yield once.
-      AbslInternalMutexYield();
-      c++;
-    } else {
-      // Then wait.
-      absl::SleepFor(absl::Microseconds(10));
-      c = 0;
-    }
-    ABSL_TSAN_MUTEX_POST_DIVERT(nullptr, 0);
-  }
-  return c;
-}
-}  // namespace synchronization_internal
-
-// --------------------------Generic atomic ops
-// Ensure that "(*pv & bits) == bits" by doing an atomic update of "*pv" to
-// "*pv | bits" if necessary.  Wait until (*pv & wait_until_clear)==0
-// before making any change.
-// This is used to set flags in mutex and condition variable words.
-static void AtomicSetBits(std::atomic<intptr_t>* pv, intptr_t bits,
-                          intptr_t wait_until_clear) {
-  intptr_t v;
-  do {
-    v = pv->load(std::memory_order_relaxed);
-  } while ((v & bits) != bits &&
-           ((v & wait_until_clear) != 0 ||
-            !pv->compare_exchange_weak(v, v | bits,
-                                       std::memory_order_release,
-                                       std::memory_order_relaxed)));
-}
-
-// Ensure that "(*pv & bits) == 0" by doing an atomic update of "*pv" to
-// "*pv & ~bits" if necessary.  Wait until (*pv & wait_until_clear)==0
-// before making any change.
-// This is used to unset flags in mutex and condition variable words.
-static void AtomicClearBits(std::atomic<intptr_t>* pv, intptr_t bits,
-                            intptr_t wait_until_clear) {
-  intptr_t v;
-  do {
-    v = pv->load(std::memory_order_relaxed);
-  } while ((v & bits) != 0 &&
-           ((v & wait_until_clear) != 0 ||
-            !pv->compare_exchange_weak(v, v & ~bits,
-                                       std::memory_order_release,
-                                       std::memory_order_relaxed)));
-}
-
-//------------------------------------------------------------------
-
-// Data for doing deadlock detection.
-ABSL_CONST_INIT static absl::base_internal::SpinLock deadlock_graph_mu(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-
-// Graph used to detect deadlocks.
-ABSL_CONST_INIT static GraphCycles *deadlock_graph
-    ABSL_GUARDED_BY(deadlock_graph_mu) ABSL_PT_GUARDED_BY(deadlock_graph_mu);
-
-//------------------------------------------------------------------
-// An event mechanism for debugging mutex use.
-// It also allows mutexes to be given names for those who can't handle
-// addresses, and instead like to give their data structures names like
-// "Henry", "Fido", or "Rupert IV, King of Yondavia".
-
-namespace {  // to prevent name pollution
-enum {       // Mutex and CondVar events passed as "ev" to PostSynchEvent
-             // Mutex events
-  SYNCH_EV_TRYLOCK_SUCCESS,
-  SYNCH_EV_TRYLOCK_FAILED,
-  SYNCH_EV_READERTRYLOCK_SUCCESS,
-  SYNCH_EV_READERTRYLOCK_FAILED,
-  SYNCH_EV_LOCK,
-  SYNCH_EV_LOCK_RETURNING,
-  SYNCH_EV_READERLOCK,
-  SYNCH_EV_READERLOCK_RETURNING,
-  SYNCH_EV_UNLOCK,
-  SYNCH_EV_READERUNLOCK,
-
-  // CondVar events
-  SYNCH_EV_WAIT,
-  SYNCH_EV_WAIT_RETURNING,
-  SYNCH_EV_SIGNAL,
-  SYNCH_EV_SIGNALALL,
-};
-
-enum {                    // Event flags
-  SYNCH_F_R = 0x01,       // reader event
-  SYNCH_F_LCK = 0x02,     // PostSynchEvent called with mutex held
-  SYNCH_F_TRY = 0x04,     // TryLock or ReaderTryLock
-  SYNCH_F_UNLOCK = 0x08,  // Unlock or ReaderUnlock
-
-  SYNCH_F_LCK_W = SYNCH_F_LCK,
-  SYNCH_F_LCK_R = SYNCH_F_LCK | SYNCH_F_R,
-};
-}  // anonymous namespace
-
-// Properties of the events.
-static const struct {
-  int flags;
-  const char *msg;
-} event_properties[] = {
-    {SYNCH_F_LCK_W | SYNCH_F_TRY, "TryLock succeeded "},
-    {0, "TryLock failed "},
-    {SYNCH_F_LCK_R | SYNCH_F_TRY, "ReaderTryLock succeeded "},
-    {0, "ReaderTryLock failed "},
-    {0, "Lock blocking "},
-    {SYNCH_F_LCK_W, "Lock returning "},
-    {0, "ReaderLock blocking "},
-    {SYNCH_F_LCK_R, "ReaderLock returning "},
-    {SYNCH_F_LCK_W | SYNCH_F_UNLOCK, "Unlock "},
-    {SYNCH_F_LCK_R | SYNCH_F_UNLOCK, "ReaderUnlock "},
-    {0, "Wait on "},
-    {0, "Wait unblocked "},
-    {0, "Signal on "},
-    {0, "SignalAll on "},
-};
-
-ABSL_CONST_INIT static absl::base_internal::SpinLock synch_event_mu(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-
-// Hash table size; should be prime > 2.
-// Can't be too small, as it's used for deadlock detection information.
-static constexpr uint32_t kNSynchEvent = 1031;
-
-static struct SynchEvent {     // this is a trivial hash table for the events
-  // struct is freed when refcount reaches 0
-  int refcount ABSL_GUARDED_BY(synch_event_mu);
-
-  // buckets have linear, 0-terminated  chains
-  SynchEvent *next ABSL_GUARDED_BY(synch_event_mu);
-
-  // Constant after initialization
-  uintptr_t masked_addr;  // object at this address is called "name"
-
-  // No explicit synchronization used.  Instead we assume that the
-  // client who enables/disables invariants/logging on a Mutex does so
-  // while the Mutex is not being concurrently accessed by others.
-  void (*invariant)(void *arg);  // called on each event
-  void *arg;            // first arg to (*invariant)()
-  bool log;             // logging turned on
-
-  // Constant after initialization
-  char name[1];         // actually longer---NUL-terminated string
-} * synch_event[kNSynchEvent] ABSL_GUARDED_BY(synch_event_mu);
-
-// Ensure that the object at "addr" has a SynchEvent struct associated with it,
-// set "bits" in the word there (waiting until lockbit is clear before doing
-// so), and return a refcounted reference that will remain valid until
-// UnrefSynchEvent() is called.  If a new SynchEvent is allocated,
-// the string name is copied into it.
-// When used with a mutex, the caller should also ensure that kMuEvent
-// is set in the mutex word, and similarly for condition variables and kCVEvent.
-static SynchEvent *EnsureSynchEvent(std::atomic<intptr_t> *addr,
-                                    const char *name, intptr_t bits,
-                                    intptr_t lockbit) {
-  uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
-  SynchEvent *e;
-  // first look for existing SynchEvent struct..
-  synch_event_mu.Lock();
-  for (e = synch_event[h];
-       e != nullptr && e->masked_addr != base_internal::HidePtr(addr);
-       e = e->next) {
-  }
-  if (e == nullptr) {  // no SynchEvent struct found; make one.
-    if (name == nullptr) {
-      name = "";
-    }
-    size_t l = strlen(name);
-    e = reinterpret_cast<SynchEvent *>(
-        base_internal::LowLevelAlloc::Alloc(sizeof(*e) + l));
-    e->refcount = 2;    // one for return value, one for linked list
-    e->masked_addr = base_internal::HidePtr(addr);
-    e->invariant = nullptr;
-    e->arg = nullptr;
-    e->log = false;
-    strcpy(e->name, name);  // NOLINT(runtime/printf)
-    e->next = synch_event[h];
-    AtomicSetBits(addr, bits, lockbit);
-    synch_event[h] = e;
-  } else {
-    e->refcount++;      // for return value
-  }
-  synch_event_mu.Unlock();
-  return e;
-}
-
-// Deallocate the SynchEvent *e, whose refcount has fallen to zero.
-static void DeleteSynchEvent(SynchEvent *e) {
-  base_internal::LowLevelAlloc::Free(e);
-}
-
-// Decrement the reference count of *e, or do nothing if e==null.
-static void UnrefSynchEvent(SynchEvent *e) {
-  if (e != nullptr) {
-    synch_event_mu.Lock();
-    bool del = (--(e->refcount) == 0);
-    synch_event_mu.Unlock();
-    if (del) {
-      DeleteSynchEvent(e);
-    }
-  }
-}
-
-// Forget the mapping from the object (Mutex or CondVar) at address addr
-// to SynchEvent object, and clear "bits" in its word (waiting until lockbit
-// is clear before doing so).
-static void ForgetSynchEvent(std::atomic<intptr_t> *addr, intptr_t bits,
-                             intptr_t lockbit) {
-  uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
-  SynchEvent **pe;
-  SynchEvent *e;
-  synch_event_mu.Lock();
-  for (pe = &synch_event[h];
-       (e = *pe) != nullptr && e->masked_addr != base_internal::HidePtr(addr);
-       pe = &e->next) {
-  }
-  bool del = false;
-  if (e != nullptr) {
-    *pe = e->next;
-    del = (--(e->refcount) == 0);
-  }
-  AtomicClearBits(addr, bits, lockbit);
-  synch_event_mu.Unlock();
-  if (del) {
-    DeleteSynchEvent(e);
-  }
-}
-
-// Return a refcounted reference to the SynchEvent of the object at address
-// "addr", if any.  The pointer returned is valid until the UnrefSynchEvent() is
-// called.
-static SynchEvent *GetSynchEvent(const void *addr) {
-  uint32_t h = reinterpret_cast<intptr_t>(addr) % kNSynchEvent;
-  SynchEvent *e;
-  synch_event_mu.Lock();
-  for (e = synch_event[h];
-       e != nullptr && e->masked_addr != base_internal::HidePtr(addr);
-       e = e->next) {
-  }
-  if (e != nullptr) {
-    e->refcount++;
-  }
-  synch_event_mu.Unlock();
-  return e;
-}
-
-// Called when an event "ev" occurs on a Mutex of CondVar "obj"
-// if event recording is on
-static void PostSynchEvent(void *obj, int ev) {
-  SynchEvent *e = GetSynchEvent(obj);
-  // logging is on if event recording is on and either there's no event struct,
-  // or it explicitly says to log
-  if (e == nullptr || e->log) {
-    void *pcs[40];
-    int n = absl::GetStackTrace(pcs, ABSL_ARRAYSIZE(pcs), 1);
-    // A buffer with enough space for the ASCII for all the PCs, even on a
-    // 64-bit machine.
-    char buffer[ABSL_ARRAYSIZE(pcs) * 24];
-    int pos = snprintf(buffer, sizeof (buffer), " @");
-    for (int i = 0; i != n; i++) {
-      pos += snprintf(&buffer[pos], sizeof (buffer) - pos, " %p", pcs[i]);
-    }
-    ABSL_RAW_LOG(INFO, "%s%p %s %s", event_properties[ev].msg, obj,
-                 (e == nullptr ? "" : e->name), buffer);
-  }
-  const int flags = event_properties[ev].flags;
-  if ((flags & SYNCH_F_LCK) != 0 && e != nullptr && e->invariant != nullptr) {
-    // Calling the invariant as is causes problems under ThreadSanitizer.
-    // We are currently inside of Mutex Lock/Unlock and are ignoring all
-    // memory accesses and synchronization. If the invariant transitively
-    // synchronizes something else and we ignore the synchronization, we will
-    // get false positive race reports later.
-    // Reuse EvalConditionAnnotated to properly call into user code.
-    struct local {
-      static bool pred(SynchEvent *ev) {
-        (*ev->invariant)(ev->arg);
-        return false;
-      }
-    };
-    Condition cond(&local::pred, e);
-    Mutex *mu = static_cast<Mutex *>(obj);
-    const bool locking = (flags & SYNCH_F_UNLOCK) == 0;
-    const bool trylock = (flags & SYNCH_F_TRY) != 0;
-    const bool read_lock = (flags & SYNCH_F_R) != 0;
-    EvalConditionAnnotated(&cond, mu, locking, trylock, read_lock);
-  }
-  UnrefSynchEvent(e);
-}
-
-//------------------------------------------------------------------
-
-// The SynchWaitParams struct encapsulates the way in which a thread is waiting:
-// whether it has a timeout, the condition, exclusive/shared, and whether a
-// condition variable wait has an associated Mutex (as opposed to another
-// type of lock).  It also points to the PerThreadSynch struct of its thread.
-// cv_word tells Enqueue() to enqueue on a CondVar using CondVarEnqueue().
-//
-// This structure is held on the stack rather than directly in
-// PerThreadSynch because a thread can be waiting on multiple Mutexes if,
-// while waiting on one Mutex, the implementation calls a client callback
-// (such as a Condition function) that acquires another Mutex. We don't
-// strictly need to allow this, but programmers become confused if we do not
-// allow them to use functions such a LOG() within Condition functions.  The
-// PerThreadSynch struct points at the most recent SynchWaitParams struct when
-// the thread is on a Mutex's waiter queue.
-struct SynchWaitParams {
-  SynchWaitParams(Mutex::MuHow how_arg, const Condition *cond_arg,
-                  KernelTimeout timeout_arg, Mutex *cvmu_arg,
-                  PerThreadSynch *thread_arg,
-                  std::atomic<intptr_t> *cv_word_arg)
-      : how(how_arg),
-        cond(cond_arg),
-        timeout(timeout_arg),
-        cvmu(cvmu_arg),
-        thread(thread_arg),
-        cv_word(cv_word_arg),
-        contention_start_cycles(base_internal::CycleClock::Now()) {}
-
-  const Mutex::MuHow how;  // How this thread needs to wait.
-  const Condition *cond;  // The condition that this thread is waiting for.
-                          // In Mutex, this field is set to zero if a timeout
-                          // expires.
-  KernelTimeout timeout;  // timeout expiry---absolute time
-                          // In Mutex, this field is set to zero if a timeout
-                          // expires.
-  Mutex *const cvmu;      // used for transfer from cond var to mutex
-  PerThreadSynch *const thread;  // thread that is waiting
-
-  // If not null, thread should be enqueued on the CondVar whose state
-  // word is cv_word instead of queueing normally on the Mutex.
-  std::atomic<intptr_t> *cv_word;
-
-  int64_t contention_start_cycles;  // Time (in cycles) when this thread started
-                                    // to contend for the mutex.
-};
-
-struct SynchLocksHeld {
-  int n;              // number of valid entries in locks[]
-  bool overflow;      // true iff we overflowed the array at some point
-  struct {
-    Mutex *mu;        // lock acquired
-    int32_t count;      // times acquired
-    GraphId id;       // deadlock_graph id of acquired lock
-  } locks[40];
-  // If a thread overfills the array during deadlock detection, we
-  // continue, discarding information as needed.  If no overflow has
-  // taken place, we can provide more error checking, such as
-  // detecting when a thread releases a lock it does not hold.
-};
-
-// A sentinel value in lists that is not 0.
-// A 0 value is used to mean "not on a list".
-static PerThreadSynch *const kPerThreadSynchNull =
-  reinterpret_cast<PerThreadSynch *>(1);
-
-static SynchLocksHeld *LocksHeldAlloc() {
-  SynchLocksHeld *ret = reinterpret_cast<SynchLocksHeld *>(
-      base_internal::LowLevelAlloc::Alloc(sizeof(SynchLocksHeld)));
-  ret->n = 0;
-  ret->overflow = false;
-  return ret;
-}
-
-// Return the PerThreadSynch-struct for this thread.
-static PerThreadSynch *Synch_GetPerThread() {
-  ThreadIdentity *identity = GetOrCreateCurrentThreadIdentity();
-  return &identity->per_thread_synch;
-}
-
-static PerThreadSynch *Synch_GetPerThreadAnnotated(Mutex *mu) {
-  if (mu) {
-    ABSL_TSAN_MUTEX_PRE_DIVERT(mu, 0);
-  }
-  PerThreadSynch *w = Synch_GetPerThread();
-  if (mu) {
-    ABSL_TSAN_MUTEX_POST_DIVERT(mu, 0);
-  }
-  return w;
-}
-
-static SynchLocksHeld *Synch_GetAllLocks() {
-  PerThreadSynch *s = Synch_GetPerThread();
-  if (s->all_locks == nullptr) {
-    s->all_locks = LocksHeldAlloc();  // Freed by ReclaimThreadIdentity.
-  }
-  return s->all_locks;
-}
-
-// Post on "w"'s associated PerThreadSem.
-inline void Mutex::IncrementSynchSem(Mutex *mu, PerThreadSynch *w) {
-  if (mu) {
-    ABSL_TSAN_MUTEX_PRE_DIVERT(mu, 0);
-  }
-  PerThreadSem::Post(w->thread_identity());
-  if (mu) {
-    ABSL_TSAN_MUTEX_POST_DIVERT(mu, 0);
-  }
-}
-
-// Wait on "w"'s associated PerThreadSem; returns false if timeout expired.
-bool Mutex::DecrementSynchSem(Mutex *mu, PerThreadSynch *w, KernelTimeout t) {
-  if (mu) {
-    ABSL_TSAN_MUTEX_PRE_DIVERT(mu, 0);
-  }
-  assert(w == Synch_GetPerThread());
-  static_cast<void>(w);
-  bool res = PerThreadSem::Wait(t);
-  if (mu) {
-    ABSL_TSAN_MUTEX_POST_DIVERT(mu, 0);
-  }
-  return res;
-}
-
-// We're in a fatal signal handler that hopes to use Mutex and to get
-// lucky by not deadlocking.  We try to improve its chances of success
-// by effectively disabling some of the consistency checks.  This will
-// prevent certain ABSL_RAW_CHECK() statements from being triggered when
-// re-rentry is detected.  The ABSL_RAW_CHECK() statements are those in the
-// Mutex code checking that the "waitp" field has not been reused.
-void Mutex::InternalAttemptToUseMutexInFatalSignalHandler() {
-  // Fix the per-thread state only if it exists.
-  ThreadIdentity *identity = CurrentThreadIdentityIfPresent();
-  if (identity != nullptr) {
-    identity->per_thread_synch.suppress_fatal_errors = true;
-  }
-  // Don't do deadlock detection when we are already failing.
-  synch_deadlock_detection.store(OnDeadlockCycle::kIgnore,
-                                 std::memory_order_release);
-}
-
-// --------------------------time support
-
-// Return the current time plus the timeout.  Use the same clock as
-// PerThreadSem::Wait() for consistency.  Unfortunately, we don't have
-// such a choice when a deadline is given directly.
-static absl::Time DeadlineFromTimeout(absl::Duration timeout) {
-#ifndef _WIN32
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return absl::TimeFromTimeval(tv) + timeout;
-#else
-  return absl::Now() + timeout;
-#endif
-}
-
-// --------------------------Mutexes
-
-// In the layout below, the msb of the bottom byte is currently unused.  Also,
-// the following constraints were considered in choosing the layout:
-//  o Both the debug allocator's "uninitialized" and "freed" patterns (0xab and
-//    0xcd) are illegal: reader and writer lock both held.
-//  o kMuWriter and kMuEvent should exceed kMuDesig and kMuWait, to enable the
-//    bit-twiddling trick in Mutex::Unlock().
-//  o kMuWriter / kMuReader == kMuWrWait / kMuWait,
-//    to enable the bit-twiddling trick in CheckForMutexCorruption().
-static const intptr_t kMuReader      = 0x0001L;  // a reader holds the lock
-static const intptr_t kMuDesig       = 0x0002L;  // there's a designated waker
-static const intptr_t kMuWait        = 0x0004L;  // threads are waiting
-static const intptr_t kMuWriter      = 0x0008L;  // a writer holds the lock
-static const intptr_t kMuEvent       = 0x0010L;  // record this mutex's events
-// INVARIANT1:  there's a thread that was blocked on the mutex, is
-// no longer, yet has not yet acquired the mutex.  If there's a
-// designated waker, all threads can avoid taking the slow path in
-// unlock because the designated waker will subsequently acquire
-// the lock and wake someone.  To maintain INVARIANT1 the bit is
-// set when a thread is unblocked(INV1a), and threads that were
-// unblocked reset the bit when they either acquire or re-block
-// (INV1b).
-static const intptr_t kMuWrWait      = 0x0020L;  // runnable writer is waiting
-                                                 // for a reader
-static const intptr_t kMuSpin        = 0x0040L;  // spinlock protects wait list
-static const intptr_t kMuLow         = 0x00ffL;  // mask all mutex bits
-static const intptr_t kMuHigh        = ~kMuLow;  // mask pointer/reader count
-
-// Hack to make constant values available to gdb pretty printer
-enum {
-  kGdbMuSpin = kMuSpin,
-  kGdbMuEvent = kMuEvent,
-  kGdbMuWait = kMuWait,
-  kGdbMuWriter = kMuWriter,
-  kGdbMuDesig = kMuDesig,
-  kGdbMuWrWait = kMuWrWait,
-  kGdbMuReader = kMuReader,
-  kGdbMuLow = kMuLow,
-};
-
-// kMuWrWait implies kMuWait.
-// kMuReader and kMuWriter are mutually exclusive.
-// If kMuReader is zero, there are no readers.
-// Otherwise, if kMuWait is zero, the high order bits contain a count of the
-// number of readers.  Otherwise, the reader count is held in
-// PerThreadSynch::readers of the most recently queued waiter, again in the
-// bits above kMuLow.
-static const intptr_t kMuOne = 0x0100;  // a count of one reader
-
-// flags passed to Enqueue and LockSlow{,WithTimeout,Loop}
-static const int kMuHasBlocked = 0x01;  // already blocked (MUST == 1)
-static const int kMuIsCond = 0x02;      // conditional waiter (CV or Condition)
-
-static_assert(PerThreadSynch::kAlignment > kMuLow,
-              "PerThreadSynch::kAlignment must be greater than kMuLow");
-
-// This struct contains various bitmasks to be used in
-// acquiring and releasing a mutex in a particular mode.
-struct MuHowS {
-  // if all the bits in fast_need_zero are zero, the lock can be acquired by
-  // adding fast_add and oring fast_or.  The bit kMuDesig should be reset iff
-  // this is the designated waker.
-  intptr_t fast_need_zero;
-  intptr_t fast_or;
-  intptr_t fast_add;
-
-  intptr_t slow_need_zero;  // fast_need_zero with events (e.g. logging)
-
-  intptr_t slow_inc_need_zero;  // if all the bits in slow_inc_need_zero are
-                                // zero a reader can acquire a read share by
-                                // setting the reader bit and incrementing
-                                // the reader count (in last waiter since
-                                // we're now slow-path).  kMuWrWait be may
-                                // be ignored if we already waited once.
-};
-
-static const MuHowS kSharedS = {
-    // shared or read lock
-    kMuWriter | kMuWait | kMuEvent,   // fast_need_zero
-    kMuReader,                        // fast_or
-    kMuOne,                           // fast_add
-    kMuWriter | kMuWait,              // slow_need_zero
-    kMuSpin | kMuWriter | kMuWrWait,  // slow_inc_need_zero
-};
-static const MuHowS kExclusiveS = {
-    // exclusive or write lock
-    kMuWriter | kMuReader | kMuEvent,  // fast_need_zero
-    kMuWriter,                         // fast_or
-    0,                                 // fast_add
-    kMuWriter | kMuReader,             // slow_need_zero
-    ~static_cast<intptr_t>(0),         // slow_inc_need_zero
-};
-static const Mutex::MuHow kShared = &kSharedS;        // shared lock
-static const Mutex::MuHow kExclusive = &kExclusiveS;  // exclusive lock
-
-#ifdef NDEBUG
-static constexpr bool kDebugMode = false;
-#else
-static constexpr bool kDebugMode = true;
-#endif
-
-#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-static unsigned TsanFlags(Mutex::MuHow how) {
-  return how == kShared ? __tsan_mutex_read_lock : 0;
-}
-#endif
-
-static bool DebugOnlyIsExiting() {
-  return false;
-}
-
-Mutex::~Mutex() {
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  if ((v & kMuEvent) != 0 && !DebugOnlyIsExiting()) {
-    ForgetSynchEvent(&this->mu_, kMuEvent, kMuSpin);
-  }
-  if (kDebugMode) {
-    this->ForgetDeadlockInfo();
-  }
-  ABSL_TSAN_MUTEX_DESTROY(this, __tsan_mutex_not_static);
-}
-
-void Mutex::EnableDebugLog(const char *name) {
-  SynchEvent *e = EnsureSynchEvent(&this->mu_, name, kMuEvent, kMuSpin);
-  e->log = true;
-  UnrefSynchEvent(e);
-}
-
-void EnableMutexInvariantDebugging(bool enabled) {
-  synch_check_invariants.store(enabled, std::memory_order_release);
-}
-
-void Mutex::EnableInvariantDebugging(void (*invariant)(void *),
-                                     void *arg) {
-  if (synch_check_invariants.load(std::memory_order_acquire) &&
-      invariant != nullptr) {
-    SynchEvent *e = EnsureSynchEvent(&this->mu_, nullptr, kMuEvent, kMuSpin);
-    e->invariant = invariant;
-    e->arg = arg;
-    UnrefSynchEvent(e);
-  }
-}
-
-void SetMutexDeadlockDetectionMode(OnDeadlockCycle mode) {
-  synch_deadlock_detection.store(mode, std::memory_order_release);
-}
-
-// Return true iff threads x and y are waiting on the same condition for the
-// same type of lock.  Requires that x and y be waiting on the same Mutex
-// queue.
-static bool MuSameCondition(PerThreadSynch *x, PerThreadSynch *y) {
-  return x->waitp->how == y->waitp->how &&
-         Condition::GuaranteedEqual(x->waitp->cond, y->waitp->cond);
-}
-
-// Given the contents of a mutex word containing a PerThreadSynch pointer,
-// return the pointer.
-static inline PerThreadSynch *GetPerThreadSynch(intptr_t v) {
-  return reinterpret_cast<PerThreadSynch *>(v & kMuHigh);
-}
-
-// The next several routines maintain the per-thread next and skip fields
-// used in the Mutex waiter queue.
-// The queue is a circular singly-linked list, of which the "head" is the
-// last element, and head->next if the first element.
-// The skip field has the invariant:
-//   For thread x, x->skip is one of:
-//     - invalid (iff x is not in a Mutex wait queue),
-//     - null, or
-//     - a pointer to a distinct thread waiting later in the same Mutex queue
-//       such that all threads in [x, x->skip] have the same condition and
-//       lock type (MuSameCondition() is true for all pairs in [x, x->skip]).
-// In addition, if x->skip is  valid, (x->may_skip || x->skip == null)
-//
-// By the spec of MuSameCondition(), it is not necessary when removing the
-// first runnable thread y from the front a Mutex queue to adjust the skip
-// field of another thread x because if x->skip==y, x->skip must (have) become
-// invalid before y is removed.  The function TryRemove can remove a specified
-// thread from an arbitrary position in the queue whether runnable or not, so
-// it fixes up skip fields that would otherwise be left dangling.
-// The statement
-//     if (x->may_skip && MuSameCondition(x, x->next)) { x->skip = x->next; }
-// maintains the invariant provided x is not the last waiter in a Mutex queue
-// The statement
-//          if (x->skip != null) { x->skip = x->skip->skip; }
-// maintains the invariant.
-
-// Returns the last thread y in a mutex waiter queue such that all threads in
-// [x, y] inclusive share the same condition.  Sets skip fields of some threads
-// in that range to optimize future evaluation of Skip() on x values in
-// the range.  Requires thread x is in a mutex waiter queue.
-// The locking is unusual.  Skip() is called under these conditions:
-//   - spinlock is held in call from Enqueue(), with maybe_unlocking == false
-//   - Mutex is held in call from UnlockSlow() by last unlocker, with
-//     maybe_unlocking == true
-//   - both Mutex and spinlock are held in call from DequeueAllWakeable() (from
-//     UnlockSlow()) and TryRemove()
-// These cases are mutually exclusive, so Skip() never runs concurrently
-// with itself on the same Mutex.   The skip chain is used in these other places
-// that cannot occur concurrently:
-//   - FixSkip() (from TryRemove()) - spinlock and Mutex are held)
-//   - Dequeue() (with spinlock and Mutex held)
-//   - UnlockSlow() (with spinlock and Mutex held)
-// A more complex case is Enqueue()
-//   - Enqueue() (with spinlock held and maybe_unlocking == false)
-//               This is the first case in which Skip is called, above.
-//   - Enqueue() (without spinlock held; but queue is empty and being freshly
-//                formed)
-//   - Enqueue() (with spinlock held and maybe_unlocking == true)
-// The first case has mutual exclusion, and the second isolation through
-// working on an otherwise unreachable data structure.
-// In the last case, Enqueue() is required to change no skip/next pointers
-// except those in the added node and the former "head" node.  This implies
-// that the new node is added after head, and so must be the new head or the
-// new front of the queue.
-static PerThreadSynch *Skip(PerThreadSynch *x) {
-  PerThreadSynch *x0 = nullptr;
-  PerThreadSynch *x1 = x;
-  PerThreadSynch *x2 = x->skip;
-  if (x2 != nullptr) {
-    // Each iteration attempts to advance sequence (x0,x1,x2) to next sequence
-    // such that   x1 == x0->skip && x2 == x1->skip
-    while ((x0 = x1, x1 = x2, x2 = x2->skip) != nullptr) {
-      x0->skip = x2;      // short-circuit skip from x0 to x2
-    }
-    x->skip = x1;         // short-circuit skip from x to result
-  }
-  return x1;
-}
-
-// "ancestor" appears before "to_be_removed" in the same Mutex waiter queue.
-// The latter is going to be removed out of order, because of a timeout.
-// Check whether "ancestor" has a skip field pointing to "to_be_removed",
-// and fix it if it does.
-static void FixSkip(PerThreadSynch *ancestor, PerThreadSynch *to_be_removed) {
-  if (ancestor->skip == to_be_removed) {  // ancestor->skip left dangling
-    if (to_be_removed->skip != nullptr) {
-      ancestor->skip = to_be_removed->skip;  // can skip past to_be_removed
-    } else if (ancestor->next != to_be_removed) {  // they are not adjacent
-      ancestor->skip = ancestor->next;             // can skip one past ancestor
-    } else {
-      ancestor->skip = nullptr;  // can't skip at all
-    }
-  }
-}
-
-static void CondVarEnqueue(SynchWaitParams *waitp);
-
-// Enqueue thread "waitp->thread" on a waiter queue.
-// Called with mutex spinlock held if head != nullptr
-// If head==nullptr and waitp->cv_word==nullptr, then Enqueue() is
-// idempotent; it alters no state associated with the existing (empty)
-// queue.
-//
-// If waitp->cv_word == nullptr, queue the thread at either the front or
-// the end (according to its priority) of the circular mutex waiter queue whose
-// head is "head", and return the new head.  mu is the previous mutex state,
-// which contains the reader count (perhaps adjusted for the operation in
-// progress) if the list was empty and a read lock held, and the holder hint if
-// the list was empty and a write lock held.  (flags & kMuIsCond) indicates
-// whether this thread was transferred from a CondVar or is waiting for a
-// non-trivial condition.  In this case, Enqueue() never returns nullptr
-//
-// If waitp->cv_word != nullptr, CondVarEnqueue() is called, and "head" is
-// returned. This mechanism is used by CondVar to queue a thread on the
-// condition variable queue instead of the mutex queue in implementing Wait().
-// In this case, Enqueue() can return nullptr (if head==nullptr).
-static PerThreadSynch *Enqueue(PerThreadSynch *head,
-                               SynchWaitParams *waitp, intptr_t mu, int flags) {
-  // If we have been given a cv_word, call CondVarEnqueue() and return
-  // the previous head of the Mutex waiter queue.
-  if (waitp->cv_word != nullptr) {
-    CondVarEnqueue(waitp);
-    return head;
-  }
-
-  PerThreadSynch *s = waitp->thread;
-  ABSL_RAW_CHECK(
-      s->waitp == nullptr ||    // normal case
-          s->waitp == waitp ||  // Fer()---transfer from condition variable
-          s->suppress_fatal_errors,
-      "detected illegal recursion into Mutex code");
-  s->waitp = waitp;
-  s->skip = nullptr;             // maintain skip invariant (see above)
-  s->may_skip = true;            // always true on entering queue
-  s->wake = false;               // not being woken
-  s->cond_waiter = ((flags & kMuIsCond) != 0);
-  if (head == nullptr) {         // s is the only waiter
-    s->next = s;                 // it's the only entry in the cycle
-    s->readers = mu;             // reader count is from mu word
-    s->maybe_unlocking = false;  // no one is searching an empty list
-    head = s;                    // s is new head
-  } else {
-    PerThreadSynch *enqueue_after = nullptr;  // we'll put s after this element
-#ifdef ABSL_HAVE_PTHREAD_GETSCHEDPARAM
-    int64_t now_cycles = base_internal::CycleClock::Now();
-    if (s->next_priority_read_cycles < now_cycles) {
-      // Every so often, update our idea of the thread's priority.
-      // pthread_getschedparam() is 5% of the block/wakeup time;
-      // base_internal::CycleClock::Now() is 0.5%.
-      int policy;
-      struct sched_param param;
-      const int err = pthread_getschedparam(pthread_self(), &policy, &param);
-      if (err != 0) {
-        ABSL_RAW_LOG(ERROR, "pthread_getschedparam failed: %d", err);
-      } else {
-        s->priority = param.sched_priority;
-        s->next_priority_read_cycles =
-            now_cycles +
-            static_cast<int64_t>(base_internal::CycleClock::Frequency());
-      }
-    }
-    if (s->priority > head->priority) {  // s's priority is above head's
-      // try to put s in priority-fifo order, or failing that at the front.
-      if (!head->maybe_unlocking) {
-        // No unlocker can be scanning the queue, so we can insert between
-        // skip-chains, and within a skip-chain if it has the same condition as
-        // s.  We insert in priority-fifo order, examining the end of every
-        // skip-chain, plus every element with the same condition as s.
-        PerThreadSynch *advance_to = head;    // next value of enqueue_after
-        PerThreadSynch *cur;                  // successor of enqueue_after
-        do {
-          enqueue_after = advance_to;
-          cur = enqueue_after->next;  // this advance ensures progress
-          advance_to = Skip(cur);   // normally, advance to end of skip chain
-                                    // (side-effect: optimizes skip chain)
-          if (advance_to != cur && s->priority > advance_to->priority &&
-              MuSameCondition(s, cur)) {
-            // but this skip chain is not a singleton, s has higher priority
-            // than its tail and has the same condition as the chain,
-            // so we can insert within the skip-chain
-            advance_to = cur;         // advance by just one
-          }
-        } while (s->priority <= advance_to->priority);
-              // termination guaranteed because s->priority > head->priority
-              // and head is the end of a skip chain
-      } else if (waitp->how == kExclusive &&
-                 Condition::GuaranteedEqual(waitp->cond, nullptr)) {
-        // An unlocker could be scanning the queue, but we know it will recheck
-        // the queue front for writers that have no condition, which is what s
-        // is, so an insert at front is safe.
-        enqueue_after = head;       // add after head, at front
-      }
-    }
-#endif
-    if (enqueue_after != nullptr) {
-      s->next = enqueue_after->next;
-      enqueue_after->next = s;
-
-      // enqueue_after can be: head, Skip(...), or cur.
-      // The first two imply enqueue_after->skip == nullptr, and
-      // the last is used only if MuSameCondition(s, cur).
-      // We require this because clearing enqueue_after->skip
-      // is impossible; enqueue_after's predecessors might also
-      // incorrectly skip over s if we were to allow other
-      // insertion points.
-      ABSL_RAW_CHECK(
-          enqueue_after->skip == nullptr || MuSameCondition(enqueue_after, s),
-          "Mutex Enqueue failure");
-
-      if (enqueue_after != head && enqueue_after->may_skip &&
-          MuSameCondition(enqueue_after, enqueue_after->next)) {
-        // enqueue_after can skip to its new successor, s
-        enqueue_after->skip = enqueue_after->next;
-      }
-      if (MuSameCondition(s, s->next)) {  // s->may_skip is known to be true
-        s->skip = s->next;                // s may skip to its successor
-      }
-    } else {   // enqueue not done any other way, so
-               // we're inserting s at the back
-      // s will become new head; copy data from head into it
-      s->next = head->next;        // add s after head
-      head->next = s;
-      s->readers = head->readers;  // reader count is from previous head
-      s->maybe_unlocking = head->maybe_unlocking;  // same for unlock hint
-      if (head->may_skip && MuSameCondition(head, s)) {
-        // head now has successor; may skip
-        head->skip = s;
-      }
-      head = s;  // s is new head
-    }
-  }
-  s->state.store(PerThreadSynch::kQueued, std::memory_order_relaxed);
-  return head;
-}
-
-// Dequeue the successor pw->next of thread pw from the Mutex waiter queue
-// whose last element is head.  The new head element is returned, or null
-// if the list is made empty.
-// Dequeue is called with both spinlock and Mutex held.
-static PerThreadSynch *Dequeue(PerThreadSynch *head, PerThreadSynch *pw) {
-  PerThreadSynch *w = pw->next;
-  pw->next = w->next;         // snip w out of list
-  if (head == w) {            // we removed the head
-    head = (pw == w) ? nullptr : pw;  // either emptied list, or pw is new head
-  } else if (pw != head && MuSameCondition(pw, pw->next)) {
-    // pw can skip to its new successor
-    if (pw->next->skip !=
-        nullptr) {  // either skip to its successors skip target
-      pw->skip = pw->next->skip;
-    } else {                   // or to pw's successor
-      pw->skip = pw->next;
-    }
-  }
-  return head;
-}
-
-// Traverse the elements [ pw->next, h] of the circular list whose last element
-// is head.
-// Remove all elements with wake==true and place them in the
-// singly-linked list wake_list in the order found.   Assumes that
-// there is only one such element if the element has how == kExclusive.
-// Return the new head.
-static PerThreadSynch *DequeueAllWakeable(PerThreadSynch *head,
-                                          PerThreadSynch *pw,
-                                          PerThreadSynch **wake_tail) {
-  PerThreadSynch *orig_h = head;
-  PerThreadSynch *w = pw->next;
-  bool skipped = false;
-  do {
-    if (w->wake) {                    // remove this element
-      ABSL_RAW_CHECK(pw->skip == nullptr, "bad skip in DequeueAllWakeable");
-      // we're removing pw's successor so either pw->skip is zero or we should
-      // already have removed pw since if pw->skip!=null, pw has the same
-      // condition as w.
-      head = Dequeue(head, pw);
-      w->next = *wake_tail;           // keep list terminated
-      *wake_tail = w;                 // add w to wake_list;
-      wake_tail = &w->next;           // next addition to end
-      if (w->waitp->how == kExclusive) {  // wake at most 1 writer
-        break;
-      }
-    } else {                // not waking this one; skip
-      pw = Skip(w);       // skip as much as possible
-      skipped = true;
-    }
-    w = pw->next;
-    // We want to stop processing after we've considered the original head,
-    // orig_h.  We can't test for w==orig_h in the loop because w may skip over
-    // it; we are guaranteed only that w's predecessor will not skip over
-    // orig_h.  When we've considered orig_h, either we've processed it and
-    // removed it (so orig_h != head), or we considered it and skipped it (so
-    // skipped==true && pw == head because skipping from head always skips by
-    // just one, leaving pw pointing at head).  So we want to
-    // continue the loop with the negation of that expression.
-  } while (orig_h == head && (pw != head || !skipped));
-  return head;
-}
-
-// Try to remove thread s from the list of waiters on this mutex.
-// Does nothing if s is not on the waiter list.
-void Mutex::TryRemove(PerThreadSynch *s) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  // acquire spinlock & lock
-  if ((v & (kMuWait | kMuSpin | kMuWriter | kMuReader)) == kMuWait &&
-      mu_.compare_exchange_strong(v, v | kMuSpin | kMuWriter,
-                                  std::memory_order_acquire,
-                                  std::memory_order_relaxed)) {
-    PerThreadSynch *h = GetPerThreadSynch(v);
-    if (h != nullptr) {
-      PerThreadSynch *pw = h;   // pw is w's predecessor
-      PerThreadSynch *w;
-      if ((w = pw->next) != s) {  // search for thread,
-        do {                      // processing at least one element
-          if (!MuSameCondition(s, w)) {  // seeking different condition
-            pw = Skip(w);                // so skip all that won't match
-            // we don't have to worry about dangling skip fields
-            // in the threads we skipped; none can point to s
-            // because their condition differs from s
-          } else {          // seeking same condition
-            FixSkip(w, s);  // fix up any skip pointer from w to s
-            pw = w;
-          }
-          // don't search further if we found the thread, or we're about to
-          // process the first thread again.
-        } while ((w = pw->next) != s && pw != h);
-      }
-      if (w == s) {                 // found thread; remove it
-        // pw->skip may be non-zero here; the loop above ensured that
-        // no ancestor of s can skip to s, so removal is safe anyway.
-        h = Dequeue(h, pw);
-        s->next = nullptr;
-        s->state.store(PerThreadSynch::kAvailable, std::memory_order_release);
-      }
-    }
-    intptr_t nv;
-    do {                        // release spinlock and lock
-      v = mu_.load(std::memory_order_relaxed);
-      nv = v & (kMuDesig | kMuEvent);
-      if (h != nullptr) {
-        nv |= kMuWait | reinterpret_cast<intptr_t>(h);
-        h->readers = 0;            // we hold writer lock
-        h->maybe_unlocking = false;  // finished unlocking
-      }
-    } while (!mu_.compare_exchange_weak(v, nv,
-                                        std::memory_order_release,
-                                        std::memory_order_relaxed));
-  }
-}
-
-// Wait until thread "s", which must be the current thread, is removed from the
-// this mutex's waiter queue.  If "s->waitp->timeout" has a timeout, wake up
-// if the wait extends past the absolute time specified, even if "s" is still
-// on the mutex queue.  In this case, remove "s" from the queue and return
-// true, otherwise return false.
-ABSL_XRAY_LOG_ARGS(1) void Mutex::Block(PerThreadSynch *s) {
-  while (s->state.load(std::memory_order_acquire) == PerThreadSynch::kQueued) {
-    if (!DecrementSynchSem(this, s, s->waitp->timeout)) {
-      // After a timeout, we go into a spin loop until we remove ourselves
-      // from the queue, or someone else removes us.  We can't be sure to be
-      // able to remove ourselves in a single lock acquisition because this
-      // mutex may be held, and the holder has the right to read the centre
-      // of the waiter queue without holding the spinlock.
-      this->TryRemove(s);
-      int c = 0;
-      while (s->next != nullptr) {
-        c = synchronization_internal::MutexDelay(c, GENTLE);
-        this->TryRemove(s);
-      }
-      if (kDebugMode) {
-        // This ensures that we test the case that TryRemove() is called when s
-        // is not on the queue.
-        this->TryRemove(s);
-      }
-      s->waitp->timeout = KernelTimeout::Never();      // timeout is satisfied
-      s->waitp->cond = nullptr;  // condition no longer relevant for wakeups
-    }
-  }
-  ABSL_RAW_CHECK(s->waitp != nullptr || s->suppress_fatal_errors,
-                 "detected illegal recursion in Mutex code");
-  s->waitp = nullptr;
-}
-
-// Wake thread w, and return the next thread in the list.
-PerThreadSynch *Mutex::Wakeup(PerThreadSynch *w) {
-  PerThreadSynch *next = w->next;
-  w->next = nullptr;
-  w->state.store(PerThreadSynch::kAvailable, std::memory_order_release);
-  IncrementSynchSem(this, w);
-
-  return next;
-}
-
-static GraphId GetGraphIdLocked(Mutex *mu)
-    ABSL_EXCLUSIVE_LOCKS_REQUIRED(deadlock_graph_mu) {
-  if (!deadlock_graph) {  // (re)create the deadlock graph.
-    deadlock_graph =
-        new (base_internal::LowLevelAlloc::Alloc(sizeof(*deadlock_graph)))
-            GraphCycles;
-  }
-  return deadlock_graph->GetId(mu);
-}
-
-static GraphId GetGraphId(Mutex *mu) ABSL_LOCKS_EXCLUDED(deadlock_graph_mu) {
-  deadlock_graph_mu.Lock();
-  GraphId id = GetGraphIdLocked(mu);
-  deadlock_graph_mu.Unlock();
-  return id;
-}
-
-// Record a lock acquisition.  This is used in debug mode for deadlock
-// detection.  The held_locks pointer points to the relevant data
-// structure for each case.
-static void LockEnter(Mutex* mu, GraphId id, SynchLocksHeld *held_locks) {
-  int n = held_locks->n;
-  int i = 0;
-  while (i != n && held_locks->locks[i].id != id) {
-    i++;
-  }
-  if (i == n) {
-    if (n == ABSL_ARRAYSIZE(held_locks->locks)) {
-      held_locks->overflow = true;  // lost some data
-    } else {                        // we have room for lock
-      held_locks->locks[i].mu = mu;
-      held_locks->locks[i].count = 1;
-      held_locks->locks[i].id = id;
-      held_locks->n = n + 1;
-    }
-  } else {
-    held_locks->locks[i].count++;
-  }
-}
-
-// Record a lock release.  Each call to LockEnter(mu, id, x) should be
-// eventually followed by a call to LockLeave(mu, id, x) by the same thread.
-// It does not process the event if is not needed when deadlock detection is
-// disabled.
-static void LockLeave(Mutex* mu, GraphId id, SynchLocksHeld *held_locks) {
-  int n = held_locks->n;
-  int i = 0;
-  while (i != n && held_locks->locks[i].id != id) {
-    i++;
-  }
-  if (i == n) {
-    if (!held_locks->overflow) {
-      // The deadlock id may have been reassigned after ForgetDeadlockInfo,
-      // but in that case mu should still be present.
-      i = 0;
-      while (i != n && held_locks->locks[i].mu != mu) {
-        i++;
-      }
-      if (i == n) {  // mu missing means releasing unheld lock
-        SynchEvent *mu_events = GetSynchEvent(mu);
-        ABSL_RAW_LOG(FATAL,
-                     "thread releasing lock it does not hold: %p %s; "
-                     ,
-                     static_cast<void *>(mu),
-                     mu_events == nullptr ? "" : mu_events->name);
-      }
-    }
-  } else if (held_locks->locks[i].count == 1) {
-    held_locks->n = n - 1;
-    held_locks->locks[i] = held_locks->locks[n - 1];
-    held_locks->locks[n - 1].id = InvalidGraphId();
-    held_locks->locks[n - 1].mu =
-        nullptr;  // clear mu to please the leak detector.
-  } else {
-    assert(held_locks->locks[i].count > 0);
-    held_locks->locks[i].count--;
-  }
-}
-
-// Call LockEnter() if in debug mode and deadlock detection is enabled.
-static inline void DebugOnlyLockEnter(Mutex *mu) {
-  if (kDebugMode) {
-    if (synch_deadlock_detection.load(std::memory_order_acquire) !=
-        OnDeadlockCycle::kIgnore) {
-      LockEnter(mu, GetGraphId(mu), Synch_GetAllLocks());
-    }
-  }
-}
-
-// Call LockEnter() if in debug mode and deadlock detection is enabled.
-static inline void DebugOnlyLockEnter(Mutex *mu, GraphId id) {
-  if (kDebugMode) {
-    if (synch_deadlock_detection.load(std::memory_order_acquire) !=
-        OnDeadlockCycle::kIgnore) {
-      LockEnter(mu, id, Synch_GetAllLocks());
-    }
-  }
-}
-
-// Call LockLeave() if in debug mode and deadlock detection is enabled.
-static inline void DebugOnlyLockLeave(Mutex *mu) {
-  if (kDebugMode) {
-    if (synch_deadlock_detection.load(std::memory_order_acquire) !=
-        OnDeadlockCycle::kIgnore) {
-      LockLeave(mu, GetGraphId(mu), Synch_GetAllLocks());
-    }
-  }
-}
-
-static char *StackString(void **pcs, int n, char *buf, int maxlen,
-                         bool symbolize) {
-  static const int kSymLen = 200;
-  char sym[kSymLen];
-  int len = 0;
-  for (int i = 0; i != n; i++) {
-    if (symbolize) {
-      if (!symbolizer(pcs[i], sym, kSymLen)) {
-        sym[0] = '\0';
-      }
-      snprintf(buf + len, maxlen - len, "%s\t@ %p %s\n",
-               (i == 0 ? "\n" : ""),
-               pcs[i], sym);
-    } else {
-      snprintf(buf + len, maxlen - len, " %p", pcs[i]);
-    }
-    len += strlen(&buf[len]);
-  }
-  return buf;
-}
-
-static char *CurrentStackString(char *buf, int maxlen, bool symbolize) {
-  void *pcs[40];
-  return StackString(pcs, absl::GetStackTrace(pcs, ABSL_ARRAYSIZE(pcs), 2), buf,
-                     maxlen, symbolize);
-}
-
-namespace {
-enum { kMaxDeadlockPathLen = 10 };  // maximum length of a deadlock cycle;
-                                    // a path this long would be remarkable
-// Buffers required to report a deadlock.
-// We do not allocate them on stack to avoid large stack frame.
-struct DeadlockReportBuffers {
-  char buf[6100];
-  GraphId path[kMaxDeadlockPathLen];
-};
-
-struct ScopedDeadlockReportBuffers {
-  ScopedDeadlockReportBuffers() {
-    b = reinterpret_cast<DeadlockReportBuffers *>(
-        base_internal::LowLevelAlloc::Alloc(sizeof(*b)));
-  }
-  ~ScopedDeadlockReportBuffers() { base_internal::LowLevelAlloc::Free(b); }
-  DeadlockReportBuffers *b;
-};
-
-// Helper to pass to GraphCycles::UpdateStackTrace.
-int GetStack(void** stack, int max_depth) {
-  return absl::GetStackTrace(stack, max_depth, 3);
-}
-}  // anonymous namespace
-
-// Called in debug mode when a thread is about to acquire a lock in a way that
-// may block.
-static GraphId DeadlockCheck(Mutex *mu) {
-  if (synch_deadlock_detection.load(std::memory_order_acquire) ==
-      OnDeadlockCycle::kIgnore) {
-    return InvalidGraphId();
-  }
-
-  SynchLocksHeld *all_locks = Synch_GetAllLocks();
-
-  absl::base_internal::SpinLockHolder lock(&deadlock_graph_mu);
-  const GraphId mu_id = GetGraphIdLocked(mu);
-
-  if (all_locks->n == 0) {
-    // There are no other locks held. Return now so that we don't need to
-    // call GetSynchEvent(). This way we do not record the stack trace
-    // for this Mutex. It's ok, since if this Mutex is involved in a deadlock,
-    // it can't always be the first lock acquired by a thread.
-    return mu_id;
-  }
-
-  // We prefer to keep stack traces that show a thread holding and acquiring
-  // as many locks as possible.  This increases the chances that a given edge
-  // in the acquires-before graph will be represented in the stack traces
-  // recorded for the locks.
-  deadlock_graph->UpdateStackTrace(mu_id, all_locks->n + 1, GetStack);
-
-  // For each other mutex already held by this thread:
-  for (int i = 0; i != all_locks->n; i++) {
-    const GraphId other_node_id = all_locks->locks[i].id;
-    const Mutex *other =
-        static_cast<const Mutex *>(deadlock_graph->Ptr(other_node_id));
-    if (other == nullptr) {
-      // Ignore stale lock
-      continue;
-    }
-
-    // Add the acquired-before edge to the graph.
-    if (!deadlock_graph->InsertEdge(other_node_id, mu_id)) {
-      ScopedDeadlockReportBuffers scoped_buffers;
-      DeadlockReportBuffers *b = scoped_buffers.b;
-      static int number_of_reported_deadlocks = 0;
-      number_of_reported_deadlocks++;
-      // Symbolize only 2 first deadlock report to avoid huge slowdowns.
-      bool symbolize = number_of_reported_deadlocks <= 2;
-      ABSL_RAW_LOG(ERROR, "Potential Mutex deadlock: %s",
-                   CurrentStackString(b->buf, sizeof (b->buf), symbolize));
-      int len = 0;
-      for (int j = 0; j != all_locks->n; j++) {
-        void* pr = deadlock_graph->Ptr(all_locks->locks[j].id);
-        if (pr != nullptr) {
-          snprintf(b->buf + len, sizeof (b->buf) - len, " %p", pr);
-          len += static_cast<int>(strlen(&b->buf[len]));
-        }
-      }
-      ABSL_RAW_LOG(ERROR, "Acquiring %p    Mutexes held: %s",
-                   static_cast<void *>(mu), b->buf);
-      ABSL_RAW_LOG(ERROR, "Cycle: ");
-      int path_len = deadlock_graph->FindPath(
-          mu_id, other_node_id, ABSL_ARRAYSIZE(b->path), b->path);
-      for (int j = 0; j != path_len; j++) {
-        GraphId id = b->path[j];
-        Mutex *path_mu = static_cast<Mutex *>(deadlock_graph->Ptr(id));
-        if (path_mu == nullptr) continue;
-        void** stack;
-        int depth = deadlock_graph->GetStackTrace(id, &stack);
-        snprintf(b->buf, sizeof(b->buf),
-                 "mutex@%p stack: ", static_cast<void *>(path_mu));
-        StackString(stack, depth, b->buf + strlen(b->buf),
-                    static_cast<int>(sizeof(b->buf) - strlen(b->buf)),
-                    symbolize);
-        ABSL_RAW_LOG(ERROR, "%s", b->buf);
-      }
-      if (synch_deadlock_detection.load(std::memory_order_acquire) ==
-          OnDeadlockCycle::kAbort) {
-        deadlock_graph_mu.Unlock();  // avoid deadlock in fatal sighandler
-        ABSL_RAW_LOG(FATAL, "dying due to potential deadlock");
-        return mu_id;
-      }
-      break;   // report at most one potential deadlock per acquisition
-    }
-  }
-
-  return mu_id;
-}
-
-// Invoke DeadlockCheck() iff we're in debug mode and
-// deadlock checking has been enabled.
-static inline GraphId DebugOnlyDeadlockCheck(Mutex *mu) {
-  if (kDebugMode && synch_deadlock_detection.load(std::memory_order_acquire) !=
-                        OnDeadlockCycle::kIgnore) {
-    return DeadlockCheck(mu);
-  } else {
-    return InvalidGraphId();
-  }
-}
-
-void Mutex::ForgetDeadlockInfo() {
-  if (kDebugMode && synch_deadlock_detection.load(std::memory_order_acquire) !=
-                        OnDeadlockCycle::kIgnore) {
-    deadlock_graph_mu.Lock();
-    if (deadlock_graph != nullptr) {
-      deadlock_graph->RemoveNode(this);
-    }
-    deadlock_graph_mu.Unlock();
-  }
-}
-
-void Mutex::AssertNotHeld() const {
-  // We have the data to allow this check only if in debug mode and deadlock
-  // detection is enabled.
-  if (kDebugMode &&
-      (mu_.load(std::memory_order_relaxed) & (kMuWriter | kMuReader)) != 0 &&
-      synch_deadlock_detection.load(std::memory_order_acquire) !=
-          OnDeadlockCycle::kIgnore) {
-    GraphId id = GetGraphId(const_cast<Mutex *>(this));
-    SynchLocksHeld *locks = Synch_GetAllLocks();
-    for (int i = 0; i != locks->n; i++) {
-      if (locks->locks[i].id == id) {
-        SynchEvent *mu_events = GetSynchEvent(this);
-        ABSL_RAW_LOG(FATAL, "thread should not hold mutex %p %s",
-                     static_cast<const void *>(this),
-                     (mu_events == nullptr ? "" : mu_events->name));
-      }
-    }
-  }
-}
-
-// Attempt to acquire *mu, and return whether successful.  The implementation
-// may spin for a short while if the lock cannot be acquired immediately.
-static bool TryAcquireWithSpinning(std::atomic<intptr_t>* mu) {
-  int c = GetMutexGlobals().spinloop_iterations;
-  do {  // do/while somewhat faster on AMD
-    intptr_t v = mu->load(std::memory_order_relaxed);
-    if ((v & (kMuReader|kMuEvent)) != 0) {
-      return false;  // a reader or tracing -> give up
-    } else if (((v & kMuWriter) == 0) &&  // no holder -> try to acquire
-               mu->compare_exchange_strong(v, kMuWriter | v,
-                                           std::memory_order_acquire,
-                                           std::memory_order_relaxed)) {
-      return true;
-    }
-  } while (--c > 0);
-  return false;
-}
-
-ABSL_XRAY_LOG_ARGS(1) void Mutex::Lock() {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, 0);
-  GraphId id = DebugOnlyDeadlockCheck(this);
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  // try fast acquire, then spin loop
-  if ((v & (kMuWriter | kMuReader | kMuEvent)) != 0 ||
-      !mu_.compare_exchange_strong(v, kMuWriter | v,
-                                   std::memory_order_acquire,
-                                   std::memory_order_relaxed)) {
-    // try spin acquire, then slow loop
-    if (!TryAcquireWithSpinning(&this->mu_)) {
-      this->LockSlow(kExclusive, nullptr, 0);
-    }
-  }
-  DebugOnlyLockEnter(this, id);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, 0, 0);
-}
-
-ABSL_XRAY_LOG_ARGS(1) void Mutex::ReaderLock() {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_read_lock);
-  GraphId id = DebugOnlyDeadlockCheck(this);
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  // try fast acquire, then slow loop
-  if ((v & (kMuWriter | kMuWait | kMuEvent)) != 0 ||
-      !mu_.compare_exchange_strong(v, (kMuReader | v) + kMuOne,
-                                   std::memory_order_acquire,
-                                   std::memory_order_relaxed)) {
-    this->LockSlow(kShared, nullptr, 0);
-  }
-  DebugOnlyLockEnter(this, id);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, __tsan_mutex_read_lock, 0);
-}
-
-void Mutex::LockWhen(const Condition &cond) {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, 0);
-  GraphId id = DebugOnlyDeadlockCheck(this);
-  this->LockSlow(kExclusive, &cond, 0);
-  DebugOnlyLockEnter(this, id);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, 0, 0);
-}
-
-bool Mutex::LockWhenWithTimeout(const Condition &cond, absl::Duration timeout) {
-  return LockWhenWithDeadline(cond, DeadlineFromTimeout(timeout));
-}
-
-bool Mutex::LockWhenWithDeadline(const Condition &cond, absl::Time deadline) {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, 0);
-  GraphId id = DebugOnlyDeadlockCheck(this);
-  bool res = LockSlowWithDeadline(kExclusive, &cond,
-                                  KernelTimeout(deadline), 0);
-  DebugOnlyLockEnter(this, id);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, 0, 0);
-  return res;
-}
-
-void Mutex::ReaderLockWhen(const Condition &cond) {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_read_lock);
-  GraphId id = DebugOnlyDeadlockCheck(this);
-  this->LockSlow(kShared, &cond, 0);
-  DebugOnlyLockEnter(this, id);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, __tsan_mutex_read_lock, 0);
-}
-
-bool Mutex::ReaderLockWhenWithTimeout(const Condition &cond,
-                                      absl::Duration timeout) {
-  return ReaderLockWhenWithDeadline(cond, DeadlineFromTimeout(timeout));
-}
-
-bool Mutex::ReaderLockWhenWithDeadline(const Condition &cond,
-                                       absl::Time deadline) {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_read_lock);
-  GraphId id = DebugOnlyDeadlockCheck(this);
-  bool res = LockSlowWithDeadline(kShared, &cond, KernelTimeout(deadline), 0);
-  DebugOnlyLockEnter(this, id);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, __tsan_mutex_read_lock, 0);
-  return res;
-}
-
-void Mutex::Await(const Condition &cond) {
-  if (cond.Eval()) {    // condition already true; nothing to do
-    if (kDebugMode) {
-      this->AssertReaderHeld();
-    }
-  } else {              // normal case
-    ABSL_RAW_CHECK(this->AwaitCommon(cond, KernelTimeout::Never()),
-                   "condition untrue on return from Await");
-  }
-}
-
-bool Mutex::AwaitWithTimeout(const Condition &cond, absl::Duration timeout) {
-  return AwaitWithDeadline(cond, DeadlineFromTimeout(timeout));
-}
-
-bool Mutex::AwaitWithDeadline(const Condition &cond, absl::Time deadline) {
-  if (cond.Eval()) {      // condition already true; nothing to do
-    if (kDebugMode) {
-      this->AssertReaderHeld();
-    }
-    return true;
-  }
-
-  KernelTimeout t{deadline};
-  bool res = this->AwaitCommon(cond, t);
-  ABSL_RAW_CHECK(res || t.has_timeout(),
-                 "condition untrue on return from Await");
-  return res;
-}
-
-bool Mutex::AwaitCommon(const Condition &cond, KernelTimeout t) {
-  this->AssertReaderHeld();
-  MuHow how =
-      (mu_.load(std::memory_order_relaxed) & kMuWriter) ? kExclusive : kShared;
-  ABSL_TSAN_MUTEX_PRE_UNLOCK(this, TsanFlags(how));
-  SynchWaitParams waitp(
-      how, &cond, t, nullptr /*no cvmu*/, Synch_GetPerThreadAnnotated(this),
-      nullptr /*no cv_word*/);
-  int flags = kMuHasBlocked;
-  if (!Condition::GuaranteedEqual(&cond, nullptr)) {
-    flags |= kMuIsCond;
-  }
-  this->UnlockSlow(&waitp);
-  this->Block(waitp.thread);
-  ABSL_TSAN_MUTEX_POST_UNLOCK(this, TsanFlags(how));
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, TsanFlags(how));
-  this->LockSlowLoop(&waitp, flags);
-  bool res = waitp.cond != nullptr ||  // => cond known true from LockSlowLoop
-             EvalConditionAnnotated(&cond, this, true, false, how == kShared);
-  ABSL_TSAN_MUTEX_POST_LOCK(this, TsanFlags(how), 0);
-  return res;
-}
-
-ABSL_XRAY_LOG_ARGS(1) bool Mutex::TryLock() {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this, __tsan_mutex_try_lock);
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  if ((v & (kMuWriter | kMuReader | kMuEvent)) == 0 &&  // try fast acquire
-      mu_.compare_exchange_strong(v, kMuWriter | v,
-                                  std::memory_order_acquire,
-                                  std::memory_order_relaxed)) {
-    DebugOnlyLockEnter(this);
-    ABSL_TSAN_MUTEX_POST_LOCK(this, __tsan_mutex_try_lock, 0);
-    return true;
-  }
-  if ((v & kMuEvent) != 0) {              // we're recording events
-    if ((v & kExclusive->slow_need_zero) == 0 &&  // try fast acquire
-        mu_.compare_exchange_strong(
-            v, (kExclusive->fast_or | v) + kExclusive->fast_add,
-            std::memory_order_acquire, std::memory_order_relaxed)) {
-      DebugOnlyLockEnter(this);
-      PostSynchEvent(this, SYNCH_EV_TRYLOCK_SUCCESS);
-      ABSL_TSAN_MUTEX_POST_LOCK(this, __tsan_mutex_try_lock, 0);
-      return true;
-    } else {
-      PostSynchEvent(this, SYNCH_EV_TRYLOCK_FAILED);
-    }
-  }
-  ABSL_TSAN_MUTEX_POST_LOCK(
-      this, __tsan_mutex_try_lock | __tsan_mutex_try_lock_failed, 0);
-  return false;
-}
-
-ABSL_XRAY_LOG_ARGS(1) bool Mutex::ReaderTryLock() {
-  ABSL_TSAN_MUTEX_PRE_LOCK(this,
-                           __tsan_mutex_read_lock | __tsan_mutex_try_lock);
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  // The while-loops (here and below) iterate only if the mutex word keeps
-  // changing (typically because the reader count changes) under the CAS.  We
-  // limit the number of attempts to avoid having to think about livelock.
-  int loop_limit = 5;
-  while ((v & (kMuWriter|kMuWait|kMuEvent)) == 0 && loop_limit != 0) {
-    if (mu_.compare_exchange_strong(v, (kMuReader | v) + kMuOne,
-                                    std::memory_order_acquire,
-                                    std::memory_order_relaxed)) {
-      DebugOnlyLockEnter(this);
-      ABSL_TSAN_MUTEX_POST_LOCK(
-          this, __tsan_mutex_read_lock | __tsan_mutex_try_lock, 0);
-      return true;
-    }
-    loop_limit--;
-    v = mu_.load(std::memory_order_relaxed);
-  }
-  if ((v & kMuEvent) != 0) {   // we're recording events
-    loop_limit = 5;
-    while ((v & kShared->slow_need_zero) == 0 && loop_limit != 0) {
-      if (mu_.compare_exchange_strong(v, (kMuReader | v) + kMuOne,
-                                      std::memory_order_acquire,
-                                      std::memory_order_relaxed)) {
-        DebugOnlyLockEnter(this);
-        PostSynchEvent(this, SYNCH_EV_READERTRYLOCK_SUCCESS);
-        ABSL_TSAN_MUTEX_POST_LOCK(
-            this, __tsan_mutex_read_lock | __tsan_mutex_try_lock, 0);
-        return true;
-      }
-      loop_limit--;
-      v = mu_.load(std::memory_order_relaxed);
-    }
-    if ((v & kMuEvent) != 0) {
-      PostSynchEvent(this, SYNCH_EV_READERTRYLOCK_FAILED);
-    }
-  }
-  ABSL_TSAN_MUTEX_POST_LOCK(this,
-                            __tsan_mutex_read_lock | __tsan_mutex_try_lock |
-                                __tsan_mutex_try_lock_failed,
-                            0);
-  return false;
-}
-
-ABSL_XRAY_LOG_ARGS(1) void Mutex::Unlock() {
-  ABSL_TSAN_MUTEX_PRE_UNLOCK(this, 0);
-  DebugOnlyLockLeave(this);
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-
-  if (kDebugMode && ((v & (kMuWriter | kMuReader)) != kMuWriter)) {
-    ABSL_RAW_LOG(FATAL, "Mutex unlocked when destroyed or not locked: v=0x%x",
-                 static_cast<unsigned>(v));
-  }
-
-  // should_try_cas is whether we'll try a compare-and-swap immediately.
-  // NOTE: optimized out when kDebugMode is false.
-  bool should_try_cas = ((v & (kMuEvent | kMuWriter)) == kMuWriter &&
-                          (v & (kMuWait | kMuDesig)) != kMuWait);
-  // But, we can use an alternate computation of it, that compilers
-  // currently don't find on their own.  When that changes, this function
-  // can be simplified.
-  intptr_t x = (v ^ (kMuWriter | kMuWait)) & (kMuWriter | kMuEvent);
-  intptr_t y = (v ^ (kMuWriter | kMuWait)) & (kMuWait | kMuDesig);
-  // Claim: "x == 0 && y > 0" is equal to should_try_cas.
-  // Also, because kMuWriter and kMuEvent exceed kMuDesig and kMuWait,
-  // all possible non-zero values for x exceed all possible values for y.
-  // Therefore, (x == 0 && y > 0) == (x < y).
-  if (kDebugMode && should_try_cas != (x < y)) {
-    // We would usually use PRIdPTR here, but is not correctly implemented
-    // within the android toolchain.
-    ABSL_RAW_LOG(FATAL, "internal logic error %llx %llx %llx\n",
-                 static_cast<long long>(v), static_cast<long long>(x),
-                 static_cast<long long>(y));
-  }
-  if (x < y &&
-      mu_.compare_exchange_strong(v, v & ~(kMuWrWait | kMuWriter),
-                                  std::memory_order_release,
-                                  std::memory_order_relaxed)) {
-    // fast writer release (writer with no waiters or with designated waker)
-  } else {
-    this->UnlockSlow(nullptr /*no waitp*/);  // take slow path
-  }
-  ABSL_TSAN_MUTEX_POST_UNLOCK(this, 0);
-}
-
-// Requires v to represent a reader-locked state.
-static bool ExactlyOneReader(intptr_t v) {
-  assert((v & (kMuWriter|kMuReader)) == kMuReader);
-  assert((v & kMuHigh) != 0);
-  // The more straightforward "(v & kMuHigh) == kMuOne" also works, but
-  // on some architectures the following generates slightly smaller code.
-  // It may be faster too.
-  constexpr intptr_t kMuMultipleWaitersMask = kMuHigh ^ kMuOne;
-  return (v & kMuMultipleWaitersMask) == 0;
-}
-
-ABSL_XRAY_LOG_ARGS(1) void Mutex::ReaderUnlock() {
-  ABSL_TSAN_MUTEX_PRE_UNLOCK(this, __tsan_mutex_read_lock);
-  DebugOnlyLockLeave(this);
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  assert((v & (kMuWriter|kMuReader)) == kMuReader);
-  if ((v & (kMuReader|kMuWait|kMuEvent)) == kMuReader) {
-    // fast reader release (reader with no waiters)
-    intptr_t clear = ExactlyOneReader(v) ? kMuReader|kMuOne : kMuOne;
-    if (mu_.compare_exchange_strong(v, v - clear,
-                                    std::memory_order_release,
-                                    std::memory_order_relaxed)) {
-      ABSL_TSAN_MUTEX_POST_UNLOCK(this, __tsan_mutex_read_lock);
-      return;
-    }
-  }
-  this->UnlockSlow(nullptr /*no waitp*/);  // take slow path
-  ABSL_TSAN_MUTEX_POST_UNLOCK(this, __tsan_mutex_read_lock);
-}
-
-// The zap_desig_waker bitmask is used to clear the designated waker flag in
-// the mutex if this thread has blocked, and therefore may be the designated
-// waker.
-static const intptr_t zap_desig_waker[] = {
-    ~static_cast<intptr_t>(0),  // not blocked
-    ~static_cast<intptr_t>(
-        kMuDesig)  // blocked; turn off the designated waker bit
-};
-
-// The ignore_waiting_writers bitmask is used to ignore the existence
-// of waiting writers if a reader that has already blocked once
-// wakes up.
-static const intptr_t ignore_waiting_writers[] = {
-    ~static_cast<intptr_t>(0),  // not blocked
-    ~static_cast<intptr_t>(
-        kMuWrWait)  // blocked; pretend there are no waiting writers
-};
-
-// Internal version of LockWhen().  See LockSlowWithDeadline()
-ABSL_ATTRIBUTE_NOINLINE void Mutex::LockSlow(MuHow how, const Condition *cond,
-                                             int flags) {
-  ABSL_RAW_CHECK(
-      this->LockSlowWithDeadline(how, cond, KernelTimeout::Never(), flags),
-      "condition untrue on return from LockSlow");
-}
-
-// Compute cond->Eval() and tell race detectors that we do it under mutex mu.
-static inline bool EvalConditionAnnotated(const Condition *cond, Mutex *mu,
-                                          bool locking, bool trylock,
-                                          bool read_lock) {
-  // Delicate annotation dance.
-  // We are currently inside of read/write lock/unlock operation.
-  // All memory accesses are ignored inside of mutex operations + for unlock
-  // operation tsan considers that we've already released the mutex.
-  bool res = false;
-#ifdef ABSL_INTERNAL_HAVE_TSAN_INTERFACE
-  const int flags = read_lock ? __tsan_mutex_read_lock : 0;
-  const int tryflags = flags | (trylock ? __tsan_mutex_try_lock : 0);
-#endif
-  if (locking) {
-    // For lock we pretend that we have finished the operation,
-    // evaluate the predicate, then unlock the mutex and start locking it again
-    // to match the annotation at the end of outer lock operation.
-    // Note: we can't simply do POST_LOCK, Eval, PRE_LOCK, because then tsan
-    // will think the lock acquisition is recursive which will trigger
-    // deadlock detector.
-    ABSL_TSAN_MUTEX_POST_LOCK(mu, tryflags, 0);
-    res = cond->Eval();
-    // There is no "try" version of Unlock, so use flags instead of tryflags.
-    ABSL_TSAN_MUTEX_PRE_UNLOCK(mu, flags);
-    ABSL_TSAN_MUTEX_POST_UNLOCK(mu, flags);
-    ABSL_TSAN_MUTEX_PRE_LOCK(mu, tryflags);
-  } else {
-    // Similarly, for unlock we pretend that we have unlocked the mutex,
-    // lock the mutex, evaluate the predicate, and start unlocking it again
-    // to match the annotation at the end of outer unlock operation.
-    ABSL_TSAN_MUTEX_POST_UNLOCK(mu, flags);
-    ABSL_TSAN_MUTEX_PRE_LOCK(mu, flags);
-    ABSL_TSAN_MUTEX_POST_LOCK(mu, flags, 0);
-    res = cond->Eval();
-    ABSL_TSAN_MUTEX_PRE_UNLOCK(mu, flags);
-  }
-  // Prevent unused param warnings in non-TSAN builds.
-  static_cast<void>(mu);
-  static_cast<void>(trylock);
-  static_cast<void>(read_lock);
-  return res;
-}
-
-// Compute cond->Eval() hiding it from race detectors.
-// We are hiding it because inside of UnlockSlow we can evaluate a predicate
-// that was just added by a concurrent Lock operation; Lock adds the predicate
-// to the internal Mutex list without actually acquiring the Mutex
-// (it only acquires the internal spinlock, which is rightfully invisible for
-// tsan). As the result there is no tsan-visible synchronization between the
-// addition and this thread. So if we would enable race detection here,
-// it would race with the predicate initialization.
-static inline bool EvalConditionIgnored(Mutex *mu, const Condition *cond) {
-  // Memory accesses are already ignored inside of lock/unlock operations,
-  // but synchronization operations are also ignored. When we evaluate the
-  // predicate we must ignore only memory accesses but not synchronization,
-  // because missed synchronization can lead to false reports later.
-  // So we "divert" (which un-ignores both memory accesses and synchronization)
-  // and then separately turn on ignores of memory accesses.
-  ABSL_TSAN_MUTEX_PRE_DIVERT(mu, 0);
-  ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_BEGIN();
-  bool res = cond->Eval();
-  ABSL_ANNOTATE_IGNORE_READS_AND_WRITES_END();
-  ABSL_TSAN_MUTEX_POST_DIVERT(mu, 0);
-  static_cast<void>(mu);  // Prevent unused param warning in non-TSAN builds.
-  return res;
-}
-
-// Internal equivalent of *LockWhenWithDeadline(), where
-//   "t" represents the absolute timeout; !t.has_timeout() means "forever".
-//   "how" is "kShared" (for ReaderLockWhen) or "kExclusive" (for LockWhen)
-// In flags, bits are ored together:
-// - kMuHasBlocked indicates that the client has already blocked on the call so
-//   the designated waker bit must be cleared and waiting writers should not
-//   obstruct this call
-// - kMuIsCond indicates that this is a conditional acquire (condition variable,
-//   Await,  LockWhen) so contention profiling should be suppressed.
-bool Mutex::LockSlowWithDeadline(MuHow how, const Condition *cond,
-                                 KernelTimeout t, int flags) {
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  bool unlock = false;
-  if ((v & how->fast_need_zero) == 0 &&  // try fast acquire
-      mu_.compare_exchange_strong(
-          v, (how->fast_or | (v & zap_desig_waker[flags & kMuHasBlocked])) +
-                 how->fast_add,
-          std::memory_order_acquire, std::memory_order_relaxed)) {
-    if (cond == nullptr ||
-        EvalConditionAnnotated(cond, this, true, false, how == kShared)) {
-      return true;
-    }
-    unlock = true;
-  }
-  SynchWaitParams waitp(
-      how, cond, t, nullptr /*no cvmu*/, Synch_GetPerThreadAnnotated(this),
-      nullptr /*no cv_word*/);
-  if (!Condition::GuaranteedEqual(cond, nullptr)) {
-    flags |= kMuIsCond;
-  }
-  if (unlock) {
-    this->UnlockSlow(&waitp);
-    this->Block(waitp.thread);
-    flags |= kMuHasBlocked;
-  }
-  this->LockSlowLoop(&waitp, flags);
-  return waitp.cond != nullptr ||  // => cond known true from LockSlowLoop
-         cond == nullptr ||
-         EvalConditionAnnotated(cond, this, true, false, how == kShared);
-}
-
-// RAW_CHECK_FMT() takes a condition, a printf-style format string, and
-// the printf-style argument list.   The format string must be a literal.
-// Arguments after the first are not evaluated unless the condition is true.
-#define RAW_CHECK_FMT(cond, ...)                                   \
-  do {                                                             \
-    if (ABSL_PREDICT_FALSE(!(cond))) {                             \
-      ABSL_RAW_LOG(FATAL, "Check " #cond " failed: " __VA_ARGS__); \
-    }                                                              \
-  } while (0)
-
-static void CheckForMutexCorruption(intptr_t v, const char* label) {
-  // Test for either of two situations that should not occur in v:
-  //   kMuWriter and kMuReader
-  //   kMuWrWait and !kMuWait
-  const uintptr_t w = v ^ kMuWait;
-  // By flipping that bit, we can now test for:
-  //   kMuWriter and kMuReader in w
-  //   kMuWrWait and kMuWait in w
-  // We've chosen these two pairs of values to be so that they will overlap,
-  // respectively, when the word is left shifted by three.  This allows us to
-  // save a branch in the common (correct) case of them not being coincident.
-  static_assert(kMuReader << 3 == kMuWriter, "must match");
-  static_assert(kMuWait << 3 == kMuWrWait, "must match");
-  if (ABSL_PREDICT_TRUE((w & (w << 3) & (kMuWriter | kMuWrWait)) == 0)) return;
-  RAW_CHECK_FMT((v & (kMuWriter | kMuReader)) != (kMuWriter | kMuReader),
-                "%s: Mutex corrupt: both reader and writer lock held: %p",
-                label, reinterpret_cast<void *>(v));
-  RAW_CHECK_FMT((v & (kMuWait | kMuWrWait)) != kMuWrWait,
-                "%s: Mutex corrupt: waiting writer with no waiters: %p",
-                label, reinterpret_cast<void *>(v));
-  assert(false);
-}
-
-void Mutex::LockSlowLoop(SynchWaitParams *waitp, int flags) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
-  int c = 0;
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  if ((v & kMuEvent) != 0) {
-    PostSynchEvent(this,
-         waitp->how == kExclusive?  SYNCH_EV_LOCK: SYNCH_EV_READERLOCK);
-  }
-  ABSL_RAW_CHECK(
-      waitp->thread->waitp == nullptr || waitp->thread->suppress_fatal_errors,
-      "detected illegal recursion into Mutex code");
-  for (;;) {
-    v = mu_.load(std::memory_order_relaxed);
-    CheckForMutexCorruption(v, "Lock");
-    if ((v & waitp->how->slow_need_zero) == 0) {
-      if (mu_.compare_exchange_strong(
-              v, (waitp->how->fast_or |
-                  (v & zap_desig_waker[flags & kMuHasBlocked])) +
-                     waitp->how->fast_add,
-              std::memory_order_acquire, std::memory_order_relaxed)) {
-        if (waitp->cond == nullptr ||
-            EvalConditionAnnotated(waitp->cond, this, true, false,
-                                   waitp->how == kShared)) {
-          break;  // we timed out, or condition true, so return
-        }
-        this->UnlockSlow(waitp);  // got lock but condition false
-        this->Block(waitp->thread);
-        flags |= kMuHasBlocked;
-        c = 0;
-      }
-    } else {                      // need to access waiter list
-      bool dowait = false;
-      if ((v & (kMuSpin|kMuWait)) == 0) {   // no waiters
-        // This thread tries to become the one and only waiter.
-        PerThreadSynch *new_h = Enqueue(nullptr, waitp, v, flags);
-        intptr_t nv = (v & zap_desig_waker[flags & kMuHasBlocked] & kMuLow) |
-                      kMuWait;
-        ABSL_RAW_CHECK(new_h != nullptr, "Enqueue to empty list failed");
-        if (waitp->how == kExclusive && (v & kMuReader) != 0) {
-          nv |= kMuWrWait;
-        }
-        if (mu_.compare_exchange_strong(
-                v, reinterpret_cast<intptr_t>(new_h) | nv,
-                std::memory_order_release, std::memory_order_relaxed)) {
-          dowait = true;
-        } else {            // attempted Enqueue() failed
-          // zero out the waitp field set by Enqueue()
-          waitp->thread->waitp = nullptr;
-        }
-      } else if ((v & waitp->how->slow_inc_need_zero &
-                  ignore_waiting_writers[flags & kMuHasBlocked]) == 0) {
-        // This is a reader that needs to increment the reader count,
-        // but the count is currently held in the last waiter.
-        if (mu_.compare_exchange_strong(
-                v, (v & zap_desig_waker[flags & kMuHasBlocked]) | kMuSpin |
-                       kMuReader,
-                std::memory_order_acquire, std::memory_order_relaxed)) {
-          PerThreadSynch *h = GetPerThreadSynch(v);
-          h->readers += kMuOne;       // inc reader count in waiter
-          do {                        // release spinlock
-            v = mu_.load(std::memory_order_relaxed);
-          } while (!mu_.compare_exchange_weak(v, (v & ~kMuSpin) | kMuReader,
-                                              std::memory_order_release,
-                                              std::memory_order_relaxed));
-          if (waitp->cond == nullptr ||
-              EvalConditionAnnotated(waitp->cond, this, true, false,
-                                     waitp->how == kShared)) {
-            break;  // we timed out, or condition true, so return
-          }
-          this->UnlockSlow(waitp);           // got lock but condition false
-          this->Block(waitp->thread);
-          flags |= kMuHasBlocked;
-          c = 0;
-        }
-      } else if ((v & kMuSpin) == 0 &&  // attempt to queue ourselves
-                 mu_.compare_exchange_strong(
-                     v, (v & zap_desig_waker[flags & kMuHasBlocked]) | kMuSpin |
-                            kMuWait,
-                     std::memory_order_acquire, std::memory_order_relaxed)) {
-        PerThreadSynch *h = GetPerThreadSynch(v);
-        PerThreadSynch *new_h = Enqueue(h, waitp, v, flags);
-        intptr_t wr_wait = 0;
-        ABSL_RAW_CHECK(new_h != nullptr, "Enqueue to list failed");
-        if (waitp->how == kExclusive && (v & kMuReader) != 0) {
-          wr_wait = kMuWrWait;      // give priority to a waiting writer
-        }
-        do {                        // release spinlock
-          v = mu_.load(std::memory_order_relaxed);
-        } while (!mu_.compare_exchange_weak(
-            v, (v & (kMuLow & ~kMuSpin)) | kMuWait | wr_wait |
-            reinterpret_cast<intptr_t>(new_h),
-            std::memory_order_release, std::memory_order_relaxed));
-        dowait = true;
-      }
-      if (dowait) {
-        this->Block(waitp->thread);  // wait until removed from list or timeout
-        flags |= kMuHasBlocked;
-        c = 0;
-      }
-    }
-    ABSL_RAW_CHECK(
-        waitp->thread->waitp == nullptr || waitp->thread->suppress_fatal_errors,
-        "detected illegal recursion into Mutex code");
-    // delay, then try again
-    c = synchronization_internal::MutexDelay(c, GENTLE);
-  }
-  ABSL_RAW_CHECK(
-      waitp->thread->waitp == nullptr || waitp->thread->suppress_fatal_errors,
-      "detected illegal recursion into Mutex code");
-  if ((v & kMuEvent) != 0) {
-    PostSynchEvent(this,
-                   waitp->how == kExclusive? SYNCH_EV_LOCK_RETURNING :
-                                      SYNCH_EV_READERLOCK_RETURNING);
-  }
-}
-
-// Unlock this mutex, which is held by the current thread.
-// If waitp is non-zero, it must be the wait parameters for the current thread
-// which holds the lock but is not runnable because its condition is false
-// or it is in the process of blocking on a condition variable; it must requeue
-// itself on the mutex/condvar to wait for its condition to become true.
-ABSL_ATTRIBUTE_NOINLINE void Mutex::UnlockSlow(SynchWaitParams *waitp) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
-  intptr_t v = mu_.load(std::memory_order_relaxed);
-  this->AssertReaderHeld();
-  CheckForMutexCorruption(v, "Unlock");
-  if ((v & kMuEvent) != 0) {
-    PostSynchEvent(this,
-                (v & kMuWriter) != 0? SYNCH_EV_UNLOCK: SYNCH_EV_READERUNLOCK);
-  }
-  int c = 0;
-  // the waiter under consideration to wake, or zero
-  PerThreadSynch *w = nullptr;
-  // the predecessor to w or zero
-  PerThreadSynch *pw = nullptr;
-  // head of the list searched previously, or zero
-  PerThreadSynch *old_h = nullptr;
-  // a condition that's known to be false.
-  const Condition *known_false = nullptr;
-  PerThreadSynch *wake_list = kPerThreadSynchNull;   // list of threads to wake
-  intptr_t wr_wait = 0;        // set to kMuWrWait if we wake a reader and a
-                               // later writer could have acquired the lock
-                               // (starvation avoidance)
-  ABSL_RAW_CHECK(waitp == nullptr || waitp->thread->waitp == nullptr ||
-                     waitp->thread->suppress_fatal_errors,
-                 "detected illegal recursion into Mutex code");
-  // This loop finds threads wake_list to wakeup if any, and removes them from
-  // the list of waiters.  In addition, it places waitp.thread on the queue of
-  // waiters if waitp is non-zero.
-  for (;;) {
-    v = mu_.load(std::memory_order_relaxed);
-    if ((v & kMuWriter) != 0 && (v & (kMuWait | kMuDesig)) != kMuWait &&
-        waitp == nullptr) {
-      // fast writer release (writer with no waiters or with designated waker)
-      if (mu_.compare_exchange_strong(v, v & ~(kMuWrWait | kMuWriter),
-                                      std::memory_order_release,
-                                      std::memory_order_relaxed)) {
-        return;
-      }
-    } else if ((v & (kMuReader | kMuWait)) == kMuReader && waitp == nullptr) {
-      // fast reader release (reader with no waiters)
-      intptr_t clear = ExactlyOneReader(v) ? kMuReader | kMuOne : kMuOne;
-      if (mu_.compare_exchange_strong(v, v - clear,
-                                      std::memory_order_release,
-                                      std::memory_order_relaxed)) {
-        return;
-      }
-    } else if ((v & kMuSpin) == 0 &&  // attempt to get spinlock
-               mu_.compare_exchange_strong(v, v | kMuSpin,
-                                           std::memory_order_acquire,
-                                           std::memory_order_relaxed)) {
-      if ((v & kMuWait) == 0) {       // no one to wake
-        intptr_t nv;
-        bool do_enqueue = true;  // always Enqueue() the first time
-        ABSL_RAW_CHECK(waitp != nullptr,
-                       "UnlockSlow is confused");  // about to sleep
-        do {    // must loop to release spinlock as reader count may change
-          v = mu_.load(std::memory_order_relaxed);
-          // decrement reader count if there are readers
-          intptr_t new_readers = (v >= kMuOne)?  v - kMuOne : v;
-          PerThreadSynch *new_h = nullptr;
-          if (do_enqueue) {
-            // If we are enqueuing on a CondVar (waitp->cv_word != nullptr) then
-            // we must not retry here.  The initial attempt will always have
-            // succeeded, further attempts would enqueue us against *this due to
-            // Fer() handling.
-            do_enqueue = (waitp->cv_word == nullptr);
-            new_h = Enqueue(nullptr, waitp, new_readers, kMuIsCond);
-          }
-          intptr_t clear = kMuWrWait | kMuWriter;  // by default clear write bit
-          if ((v & kMuWriter) == 0 && ExactlyOneReader(v)) {  // last reader
-            clear = kMuWrWait | kMuReader;                    // clear read bit
-          }
-          nv = (v & kMuLow & ~clear & ~kMuSpin);
-          if (new_h != nullptr) {
-            nv |= kMuWait | reinterpret_cast<intptr_t>(new_h);
-          } else {  // new_h could be nullptr if we queued ourselves on a
-                    // CondVar
-            // In that case, we must place the reader count back in the mutex
-            // word, as Enqueue() did not store it in the new waiter.
-            nv |= new_readers & kMuHigh;
-          }
-          // release spinlock & our lock; retry if reader-count changed
-          // (writer count cannot change since we hold lock)
-        } while (!mu_.compare_exchange_weak(v, nv,
-                                            std::memory_order_release,
-                                            std::memory_order_relaxed));
-        break;
-      }
-
-      // There are waiters.
-      // Set h to the head of the circular waiter list.
-      PerThreadSynch *h = GetPerThreadSynch(v);
-      if ((v & kMuReader) != 0 && (h->readers & kMuHigh) > kMuOne) {
-        // a reader but not the last
-        h->readers -= kMuOne;  // release our lock
-        intptr_t nv = v;       // normally just release spinlock
-        if (waitp != nullptr) {  // but waitp!=nullptr => must queue ourselves
-          PerThreadSynch *new_h = Enqueue(h, waitp, v, kMuIsCond);
-          ABSL_RAW_CHECK(new_h != nullptr,
-                         "waiters disappeared during Enqueue()!");
-          nv &= kMuLow;
-          nv |= kMuWait | reinterpret_cast<intptr_t>(new_h);
-        }
-        mu_.store(nv, std::memory_order_release);  // release spinlock
-        // can release with a store because there were waiters
-        break;
-      }
-
-      // Either we didn't search before, or we marked the queue
-      // as "maybe_unlocking" and no one else should have changed it.
-      ABSL_RAW_CHECK(old_h == nullptr || h->maybe_unlocking,
-                     "Mutex queue changed beneath us");
-
-      // The lock is becoming free, and there's a waiter
-      if (old_h != nullptr &&
-          !old_h->may_skip) {                  // we used old_h as a terminator
-        old_h->may_skip = true;                // allow old_h to skip once more
-        ABSL_RAW_CHECK(old_h->skip == nullptr, "illegal skip from head");
-        if (h != old_h && MuSameCondition(old_h, old_h->next)) {
-          old_h->skip = old_h->next;  // old_h not head & can skip to successor
-        }
-      }
-      if (h->next->waitp->how == kExclusive &&
-          Condition::GuaranteedEqual(h->next->waitp->cond, nullptr)) {
-        // easy case: writer with no condition; no need to search
-        pw = h;                       // wake w, the successor of h (=pw)
-        w = h->next;
-        w->wake = true;
-        // We are waking up a writer.  This writer may be racing against
-        // an already awake reader for the lock.  We want the
-        // writer to usually win this race,
-        // because if it doesn't, we can potentially keep taking a reader
-        // perpetually and writers will starve.  Worse than
-        // that, this can also starve other readers if kMuWrWait gets set
-        // later.
-        wr_wait = kMuWrWait;
-      } else if (w != nullptr && (w->waitp->how == kExclusive || h == old_h)) {
-        // we found a waiter w to wake on a previous iteration and either it's
-        // a writer, or we've searched the entire list so we have all the
-        // readers.
-        if (pw == nullptr) {  // if w's predecessor is unknown, it must be h
-          pw = h;
-        }
-      } else {
-        // At this point we don't know all the waiters to wake, and the first
-        // waiter has a condition or is a reader.  We avoid searching over
-        // waiters we've searched on previous iterations by starting at
-        // old_h if it's set.  If old_h==h, there's no one to wakeup at all.
-        if (old_h == h) {      // we've searched before, and nothing's new
-                               // so there's no one to wake.
-          intptr_t nv = (v & ~(kMuReader|kMuWriter|kMuWrWait));
-          h->readers = 0;
-          h->maybe_unlocking = false;   // finished unlocking
-          if (waitp != nullptr) {       // we must queue ourselves and sleep
-            PerThreadSynch *new_h = Enqueue(h, waitp, v, kMuIsCond);
-            nv &= kMuLow;
-            if (new_h != nullptr) {
-              nv |= kMuWait | reinterpret_cast<intptr_t>(new_h);
-            }  // else new_h could be nullptr if we queued ourselves on a
-               // CondVar
-          }
-          // release spinlock & lock
-          // can release with a store because there were waiters
-          mu_.store(nv, std::memory_order_release);
-          break;
-        }
-
-        // set up to walk the list
-        PerThreadSynch *w_walk;   // current waiter during list walk
-        PerThreadSynch *pw_walk;  // previous waiter during list walk
-        if (old_h != nullptr) {  // we've searched up to old_h before
-          pw_walk = old_h;
-          w_walk = old_h->next;
-        } else {            // no prior search, start at beginning
-          pw_walk =
-              nullptr;  // h->next's predecessor may change; don't record it
-          w_walk = h->next;
-        }
-
-        h->may_skip = false;  // ensure we never skip past h in future searches
-                              // even if other waiters are queued after it.
-        ABSL_RAW_CHECK(h->skip == nullptr, "illegal skip from head");
-
-        h->maybe_unlocking = true;  // we're about to scan the waiter list
-                                    // without the spinlock held.
-                                    // Enqueue must be conservative about
-                                    // priority queuing.
-
-        // We must release the spinlock to evaluate the conditions.
-        mu_.store(v, std::memory_order_release);  // release just spinlock
-        // can release with a store because there were waiters
-
-        // h is the last waiter queued, and w_walk the first unsearched waiter.
-        // Without the spinlock, the locations mu_ and h->next may now change
-        // underneath us, but since we hold the lock itself, the only legal
-        // change is to add waiters between h and w_walk.  Therefore, it's safe
-        // to walk the path from w_walk to h inclusive. (TryRemove() can remove
-        // a waiter anywhere, but it acquires both the spinlock and the Mutex)
-
-        old_h = h;        // remember we searched to here
-
-        // Walk the path upto and including h looking for waiters we can wake.
-        while (pw_walk != h) {
-          w_walk->wake = false;
-          if (w_walk->waitp->cond ==
-                  nullptr ||  // no condition => vacuously true OR
-              (w_walk->waitp->cond != known_false &&
-               // this thread's condition is not known false, AND
-               //  is in fact true
-               EvalConditionIgnored(this, w_walk->waitp->cond))) {
-            if (w == nullptr) {
-              w_walk->wake = true;    // can wake this waiter
-              w = w_walk;
-              pw = pw_walk;
-              if (w_walk->waitp->how == kExclusive) {
-                wr_wait = kMuWrWait;
-                break;                // bail if waking this writer
-              }
-            } else if (w_walk->waitp->how == kShared) {  // wake if a reader
-              w_walk->wake = true;
-            } else {   // writer with true condition
-              wr_wait = kMuWrWait;
-            }
-          } else {                  // can't wake; condition false
-            known_false = w_walk->waitp->cond;  // remember last false condition
-          }
-          if (w_walk->wake) {   // we're waking reader w_walk
-            pw_walk = w_walk;   // don't skip similar waiters
-          } else {              // not waking; skip as much as possible
-            pw_walk = Skip(w_walk);
-          }
-          // If pw_walk == h, then load of pw_walk->next can race with
-          // concurrent write in Enqueue(). However, at the same time
-          // we do not need to do the load, because we will bail out
-          // from the loop anyway.
-          if (pw_walk != h) {
-            w_walk = pw_walk->next;
-          }
-        }
-
-        continue;  // restart for(;;)-loop to wakeup w or to find more waiters
-      }
-      ABSL_RAW_CHECK(pw->next == w, "pw not w's predecessor");
-      // The first (and perhaps only) waiter we've chosen to wake is w, whose
-      // predecessor is pw.  If w is a reader, we must wake all the other
-      // waiters with wake==true as well.  We may also need to queue
-      // ourselves if waitp != null.  The spinlock and the lock are still
-      // held.
-
-      // This traverses the list in [ pw->next, h ], where h is the head,
-      // removing all elements with wake==true and placing them in the
-      // singly-linked list wake_list.  Returns the new head.
-      h = DequeueAllWakeable(h, pw, &wake_list);
-
-      intptr_t nv = (v & kMuEvent) | kMuDesig;
-                                             // assume no waiters left,
-                                             // set kMuDesig for INV1a
-
-      if (waitp != nullptr) {  // we must queue ourselves and sleep
-        h = Enqueue(h, waitp, v, kMuIsCond);
-        // h is new last waiter; could be null if we queued ourselves on a
-        // CondVar
-      }
-
-      ABSL_RAW_CHECK(wake_list != kPerThreadSynchNull,
-                     "unexpected empty wake list");
-
-      if (h != nullptr) {  // there are waiters left
-        h->readers = 0;
-        h->maybe_unlocking = false;     // finished unlocking
-        nv |= wr_wait | kMuWait | reinterpret_cast<intptr_t>(h);
-      }
-
-      // release both spinlock & lock
-      // can release with a store because there were waiters
-      mu_.store(nv, std::memory_order_release);
-      break;  // out of for(;;)-loop
-    }
-    // aggressive here; no one can proceed till we do
-    c = synchronization_internal::MutexDelay(c, AGGRESSIVE);
-  }                            // end of for(;;)-loop
-
-  if (wake_list != kPerThreadSynchNull) {
-    int64_t enqueue_timestamp = wake_list->waitp->contention_start_cycles;
-    bool cond_waiter = wake_list->cond_waiter;
-    do {
-      wake_list = Wakeup(wake_list);              // wake waiters
-    } while (wake_list != kPerThreadSynchNull);
-    if (!cond_waiter) {
-      // Sample lock contention events only if the (first) waiter was trying to
-      // acquire the lock, not waiting on a condition variable or Condition.
-      int64_t wait_cycles =
-          base_internal::CycleClock::Now() - enqueue_timestamp;
-      mutex_tracer("slow release", this, wait_cycles);
-      ABSL_TSAN_MUTEX_PRE_DIVERT(this, 0);
-      submit_profile_data(enqueue_timestamp);
-      ABSL_TSAN_MUTEX_POST_DIVERT(this, 0);
-    }
-  }
-}
-
-// Used by CondVar implementation to reacquire mutex after waking from
-// condition variable.  This routine is used instead of Lock() because the
-// waiting thread may have been moved from the condition variable queue to the
-// mutex queue without a wakeup, by Trans().  In that case, when the thread is
-// finally woken, the woken thread will believe it has been woken from the
-// condition variable (i.e. its PC will be in when in the CondVar code), when
-// in fact it has just been woken from the mutex.  Thus, it must enter the slow
-// path of the mutex in the same state as if it had just woken from the mutex.
-// That is, it must ensure to clear kMuDesig (INV1b).
-void Mutex::Trans(MuHow how) {
-  this->LockSlow(how, nullptr, kMuHasBlocked | kMuIsCond);
-}
-
-// Used by CondVar implementation to effectively wake thread w from the
-// condition variable.  If this mutex is free, we simply wake the thread.
-// It will later acquire the mutex with high probability.  Otherwise, we
-// enqueue thread w on this mutex.
-void Mutex::Fer(PerThreadSynch *w) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
-  int c = 0;
-  ABSL_RAW_CHECK(w->waitp->cond == nullptr,
-                 "Mutex::Fer while waiting on Condition");
-  ABSL_RAW_CHECK(!w->waitp->timeout.has_timeout(),
-                 "Mutex::Fer while in timed wait");
-  ABSL_RAW_CHECK(w->waitp->cv_word == nullptr,
-                 "Mutex::Fer with pending CondVar queueing");
-  for (;;) {
-    intptr_t v = mu_.load(std::memory_order_relaxed);
-    // Note: must not queue if the mutex is unlocked (nobody will wake it).
-    // For example, we can have only kMuWait (conditional) or maybe
-    // kMuWait|kMuWrWait.
-    // conflicting != 0 implies that the waking thread cannot currently take
-    // the mutex, which in turn implies that someone else has it and can wake
-    // us if we queue.
-    const intptr_t conflicting =
-        kMuWriter | (w->waitp->how == kShared ? 0 : kMuReader);
-    if ((v & conflicting) == 0) {
-      w->next = nullptr;
-      w->state.store(PerThreadSynch::kAvailable, std::memory_order_release);
-      IncrementSynchSem(this, w);
-      return;
-    } else {
-      if ((v & (kMuSpin|kMuWait)) == 0) {       // no waiters
-        // This thread tries to become the one and only waiter.
-        PerThreadSynch *new_h = Enqueue(nullptr, w->waitp, v, kMuIsCond);
-        ABSL_RAW_CHECK(new_h != nullptr,
-                       "Enqueue failed");  // we must queue ourselves
-        if (mu_.compare_exchange_strong(
-                v, reinterpret_cast<intptr_t>(new_h) | (v & kMuLow) | kMuWait,
-                std::memory_order_release, std::memory_order_relaxed)) {
-          return;
-        }
-      } else if ((v & kMuSpin) == 0 &&
-                 mu_.compare_exchange_strong(v, v | kMuSpin | kMuWait)) {
-        PerThreadSynch *h = GetPerThreadSynch(v);
-        PerThreadSynch *new_h = Enqueue(h, w->waitp, v, kMuIsCond);
-        ABSL_RAW_CHECK(new_h != nullptr,
-                       "Enqueue failed");  // we must queue ourselves
-        do {
-          v = mu_.load(std::memory_order_relaxed);
-        } while (!mu_.compare_exchange_weak(
-            v,
-            (v & kMuLow & ~kMuSpin) | kMuWait |
-                reinterpret_cast<intptr_t>(new_h),
-            std::memory_order_release, std::memory_order_relaxed));
-        return;
-      }
-    }
-    c = synchronization_internal::MutexDelay(c, GENTLE);
-  }
-}
-
-void Mutex::AssertHeld() const {
-  if ((mu_.load(std::memory_order_relaxed) & kMuWriter) == 0) {
-    SynchEvent *e = GetSynchEvent(this);
-    ABSL_RAW_LOG(FATAL, "thread should hold write lock on Mutex %p %s",
-                 static_cast<const void *>(this),
-                 (e == nullptr ? "" : e->name));
-  }
-}
-
-void Mutex::AssertReaderHeld() const {
-  if ((mu_.load(std::memory_order_relaxed) & (kMuReader | kMuWriter)) == 0) {
-    SynchEvent *e = GetSynchEvent(this);
-    ABSL_RAW_LOG(
-        FATAL, "thread should hold at least a read lock on Mutex %p %s",
-        static_cast<const void *>(this), (e == nullptr ? "" : e->name));
-  }
-}
-
-// -------------------------------- condition variables
-static const intptr_t kCvSpin = 0x0001L;   // spinlock protects waiter list
-static const intptr_t kCvEvent = 0x0002L;  // record events
-
-static const intptr_t kCvLow = 0x0003L;  // low order bits of CV
-
-// Hack to make constant values available to gdb pretty printer
-enum { kGdbCvSpin = kCvSpin, kGdbCvEvent = kCvEvent, kGdbCvLow = kCvLow, };
-
-static_assert(PerThreadSynch::kAlignment > kCvLow,
-              "PerThreadSynch::kAlignment must be greater than kCvLow");
-
-void CondVar::EnableDebugLog(const char *name) {
-  SynchEvent *e = EnsureSynchEvent(&this->cv_, name, kCvEvent, kCvSpin);
-  e->log = true;
-  UnrefSynchEvent(e);
-}
-
-CondVar::~CondVar() {
-  if ((cv_.load(std::memory_order_relaxed) & kCvEvent) != 0) {
-    ForgetSynchEvent(&this->cv_, kCvEvent, kCvSpin);
-  }
-}
-
-
-// Remove thread s from the list of waiters on this condition variable.
-void CondVar::Remove(PerThreadSynch *s) {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
-  intptr_t v;
-  int c = 0;
-  for (v = cv_.load(std::memory_order_relaxed);;
-       v = cv_.load(std::memory_order_relaxed)) {
-    if ((v & kCvSpin) == 0 &&  // attempt to acquire spinlock
-        cv_.compare_exchange_strong(v, v | kCvSpin,
-                                    std::memory_order_acquire,
-                                    std::memory_order_relaxed)) {
-      PerThreadSynch *h = reinterpret_cast<PerThreadSynch *>(v & ~kCvLow);
-      if (h != nullptr) {
-        PerThreadSynch *w = h;
-        while (w->next != s && w->next != h) {  // search for thread
-          w = w->next;
-        }
-        if (w->next == s) {           // found thread; remove it
-          w->next = s->next;
-          if (h == s) {
-            h = (w == s) ? nullptr : w;
-          }
-          s->next = nullptr;
-          s->state.store(PerThreadSynch::kAvailable, std::memory_order_release);
-        }
-      }
-                                      // release spinlock
-      cv_.store((v & kCvEvent) | reinterpret_cast<intptr_t>(h),
-                std::memory_order_release);
-      return;
-    } else {
-      // try again after a delay
-      c = synchronization_internal::MutexDelay(c, GENTLE);
-    }
-  }
-}
-
-// Queue thread waitp->thread on condition variable word cv_word using
-// wait parameters waitp.
-// We split this into a separate routine, rather than simply doing it as part
-// of WaitCommon().  If we were to queue ourselves on the condition variable
-// before calling Mutex::UnlockSlow(), the Mutex code might be re-entered (via
-// the logging code, or via a Condition function) and might potentially attempt
-// to block this thread.  That would be a problem if the thread were already on
-// a the condition variable waiter queue.  Thus, we use the waitp->cv_word
-// to tell the unlock code to call CondVarEnqueue() to queue the thread on the
-// condition variable queue just before the mutex is to be unlocked, and (most
-// importantly) after any call to an external routine that might re-enter the
-// mutex code.
-static void CondVarEnqueue(SynchWaitParams *waitp) {
-  // This thread might be transferred to the Mutex queue by Fer() when
-  // we are woken.  To make sure that is what happens, Enqueue() doesn't
-  // call CondVarEnqueue() again but instead uses its normal code.  We
-  // must do this before we queue ourselves so that cv_word will be null
-  // when seen by the dequeuer, who may wish immediately to requeue
-  // this thread on another queue.
-  std::atomic<intptr_t> *cv_word = waitp->cv_word;
-  waitp->cv_word = nullptr;
-
-  intptr_t v = cv_word->load(std::memory_order_relaxed);
-  int c = 0;
-  while ((v & kCvSpin) != 0 ||  // acquire spinlock
-         !cv_word->compare_exchange_weak(v, v | kCvSpin,
-                                         std::memory_order_acquire,
-                                         std::memory_order_relaxed)) {
-    c = synchronization_internal::MutexDelay(c, GENTLE);
-    v = cv_word->load(std::memory_order_relaxed);
-  }
-  ABSL_RAW_CHECK(waitp->thread->waitp == nullptr, "waiting when shouldn't be");
-  waitp->thread->waitp = waitp;      // prepare ourselves for waiting
-  PerThreadSynch *h = reinterpret_cast<PerThreadSynch *>(v & ~kCvLow);
-  if (h == nullptr) {  // add this thread to waiter list
-    waitp->thread->next = waitp->thread;
-  } else {
-    waitp->thread->next = h->next;
-    h->next = waitp->thread;
-  }
-  waitp->thread->state.store(PerThreadSynch::kQueued,
-                             std::memory_order_relaxed);
-  cv_word->store((v & kCvEvent) | reinterpret_cast<intptr_t>(waitp->thread),
-                 std::memory_order_release);
-}
-
-bool CondVar::WaitCommon(Mutex *mutex, KernelTimeout t) {
-  bool rc = false;          // return value; true iff we timed-out
-
-  intptr_t mutex_v = mutex->mu_.load(std::memory_order_relaxed);
-  Mutex::MuHow mutex_how = ((mutex_v & kMuWriter) != 0) ? kExclusive : kShared;
-  ABSL_TSAN_MUTEX_PRE_UNLOCK(mutex, TsanFlags(mutex_how));
-
-  // maybe trace this call
-  intptr_t v = cv_.load(std::memory_order_relaxed);
-  cond_var_tracer("Wait", this);
-  if ((v & kCvEvent) != 0) {
-    PostSynchEvent(this, SYNCH_EV_WAIT);
-  }
-
-  // Release mu and wait on condition variable.
-  SynchWaitParams waitp(mutex_how, nullptr, t, mutex,
-                        Synch_GetPerThreadAnnotated(mutex), &cv_);
-  // UnlockSlow() will call CondVarEnqueue() just before releasing the
-  // Mutex, thus queuing this thread on the condition variable.  See
-  // CondVarEnqueue() for the reasons.
-  mutex->UnlockSlow(&waitp);
-
-  // wait for signal
-  while (waitp.thread->state.load(std::memory_order_acquire) ==
-         PerThreadSynch::kQueued) {
-    if (!Mutex::DecrementSynchSem(mutex, waitp.thread, t)) {
-      this->Remove(waitp.thread);
-      rc = true;
-    }
-  }
-
-  ABSL_RAW_CHECK(waitp.thread->waitp != nullptr, "not waiting when should be");
-  waitp.thread->waitp = nullptr;  // cleanup
-
-  // maybe trace this call
-  cond_var_tracer("Unwait", this);
-  if ((v & kCvEvent) != 0) {
-    PostSynchEvent(this, SYNCH_EV_WAIT_RETURNING);
-  }
-
-  // From synchronization point of view Wait is unlock of the mutex followed
-  // by lock of the mutex. We've annotated start of unlock in the beginning
-  // of the function. Now, finish unlock and annotate lock of the mutex.
-  // (Trans is effectively lock).
-  ABSL_TSAN_MUTEX_POST_UNLOCK(mutex, TsanFlags(mutex_how));
-  ABSL_TSAN_MUTEX_PRE_LOCK(mutex, TsanFlags(mutex_how));
-  mutex->Trans(mutex_how);  // Reacquire mutex
-  ABSL_TSAN_MUTEX_POST_LOCK(mutex, TsanFlags(mutex_how), 0);
-  return rc;
-}
-
-bool CondVar::WaitWithTimeout(Mutex *mu, absl::Duration timeout) {
-  return WaitWithDeadline(mu, DeadlineFromTimeout(timeout));
-}
-
-bool CondVar::WaitWithDeadline(Mutex *mu, absl::Time deadline) {
-  return WaitCommon(mu, KernelTimeout(deadline));
-}
-
-void CondVar::Wait(Mutex *mu) {
-  WaitCommon(mu, KernelTimeout::Never());
-}
-
-// Wake thread w
-// If it was a timed wait, w will be waiting on w->cv
-// Otherwise, if it was not a Mutex mutex, w will be waiting on w->sem
-// Otherwise, w is transferred to the Mutex mutex via Mutex::Fer().
-void CondVar::Wakeup(PerThreadSynch *w) {
-  if (w->waitp->timeout.has_timeout() || w->waitp->cvmu == nullptr) {
-    // The waiting thread only needs to observe "w->state == kAvailable" to be
-    // released, we must cache "cvmu" before clearing "next".
-    Mutex *mu = w->waitp->cvmu;
-    w->next = nullptr;
-    w->state.store(PerThreadSynch::kAvailable, std::memory_order_release);
-    Mutex::IncrementSynchSem(mu, w);
-  } else {
-    w->waitp->cvmu->Fer(w);
-  }
-}
-
-void CondVar::Signal() {
-  SchedulingGuard::ScopedDisable disable_rescheduling;
-  ABSL_TSAN_MUTEX_PRE_SIGNAL(nullptr, 0);
-  intptr_t v;
-  int c = 0;
-  for (v = cv_.load(std::memory_order_relaxed); v != 0;
-       v = cv_.load(std::memory_order_relaxed)) {
-    if ((v & kCvSpin) == 0 &&  // attempt to acquire spinlock
-        cv_.compare_exchange_strong(v, v | kCvSpin,
-                                    std::memory_order_acquire,
-                                    std::memory_order_relaxed)) {
-      PerThreadSynch *h = reinterpret_cast<PerThreadSynch *>(v & ~kCvLow);
-      PerThreadSynch *w = nullptr;
-      if (h != nullptr) {  // remove first waiter
-        w = h->next;
-        if (w == h) {
-          h = nullptr;
-        } else {
-          h->next = w->next;
-        }
-      }
-                                      // release spinlock
-      cv_.store((v & kCvEvent) | reinterpret_cast<intptr_t>(h),
-                std::memory_order_release);
-      if (w != nullptr) {
-        CondVar::Wakeup(w);                // wake waiter, if there was one
-        cond_var_tracer("Signal wakeup", this);
-      }
-      if ((v & kCvEvent) != 0) {
-        PostSynchEvent(this, SYNCH_EV_SIGNAL);
-      }
-      ABSL_TSAN_MUTEX_POST_SIGNAL(nullptr, 0);
-      return;
-    } else {
-      c = synchronization_internal::MutexDelay(c, GENTLE);
-    }
-  }
-  ABSL_TSAN_MUTEX_POST_SIGNAL(nullptr, 0);
-}
-
-void CondVar::SignalAll () {
-  ABSL_TSAN_MUTEX_PRE_SIGNAL(nullptr, 0);
-  intptr_t v;
-  int c = 0;
-  for (v = cv_.load(std::memory_order_relaxed); v != 0;
-       v = cv_.load(std::memory_order_relaxed)) {
-    // empty the list if spinlock free
-    // We do this by simply setting the list to empty using
-    // compare and swap.   We then have the entire list in our hands,
-    // which cannot be changing since we grabbed it while no one
-    // held the lock.
-    if ((v & kCvSpin) == 0 &&
-        cv_.compare_exchange_strong(v, v & kCvEvent, std::memory_order_acquire,
-                                    std::memory_order_relaxed)) {
-      PerThreadSynch *h = reinterpret_cast<PerThreadSynch *>(v & ~kCvLow);
-      if (h != nullptr) {
-        PerThreadSynch *w;
-        PerThreadSynch *n = h->next;
-        do {                          // for every thread, wake it up
-          w = n;
-          n = n->next;
-          CondVar::Wakeup(w);
-        } while (w != h);
-        cond_var_tracer("SignalAll wakeup", this);
-      }
-      if ((v & kCvEvent) != 0) {
-        PostSynchEvent(this, SYNCH_EV_SIGNALALL);
-      }
-      ABSL_TSAN_MUTEX_POST_SIGNAL(nullptr, 0);
-      return;
-    } else {
-      // try again after a delay
-      c = synchronization_internal::MutexDelay(c, GENTLE);
-    }
-  }
-  ABSL_TSAN_MUTEX_POST_SIGNAL(nullptr, 0);
-}
-
-void ReleasableMutexLock::Release() {
-  ABSL_RAW_CHECK(this->mu_ != nullptr,
-                 "ReleasableMutexLock::Release may only be called once");
-  this->mu_->Unlock();
-  this->mu_ = nullptr;
-}
-
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-extern "C" void __tsan_read1(void *addr);
-#else
-#define __tsan_read1(addr)  // do nothing if TSan not enabled
-#endif
-
-// A function that just returns its argument, dereferenced
-static bool Dereference(void *arg) {
-  // ThreadSanitizer does not instrument this file for memory accesses.
-  // This function dereferences a user variable that can participate
-  // in a data race, so we need to manually tell TSan about this memory access.
-  __tsan_read1(arg);
-  return *(static_cast<bool *>(arg));
-}
-
-Condition::Condition() {}   // null constructor, used for kTrue only
-const Condition Condition::kTrue;
-
-Condition::Condition(bool (*func)(void *), void *arg)
-    : eval_(&CallVoidPtrFunction),
-      function_(func),
-      method_(nullptr),
-      arg_(arg) {}
-
-bool Condition::CallVoidPtrFunction(const Condition *c) {
-  return (*c->function_)(c->arg_);
-}
-
-Condition::Condition(const bool *cond)
-    : eval_(CallVoidPtrFunction),
-      function_(Dereference),
-      method_(nullptr),
-      // const_cast is safe since Dereference does not modify arg
-      arg_(const_cast<bool *>(cond)) {}
-
-bool Condition::Eval() const {
-  // eval_ == null for kTrue
-  return (this->eval_ == nullptr) || (*this->eval_)(this);
-}
-
-bool Condition::GuaranteedEqual(const Condition *a, const Condition *b) {
-  if (a == nullptr) {
-    return b == nullptr || b->eval_ == nullptr;
-  }
-  if (b == nullptr || b->eval_ == nullptr) {
-    return a->eval_ == nullptr;
-  }
-  return a->eval_ == b->eval_ && a->function_ == b->function_ &&
-         a->arg_ == b->arg_ && a->method_ == b->method_;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/mutex.h b/third_party/abseil/absl/synchronization/mutex.h
deleted file mode 100644
index 598d1e0..0000000
--- a/third_party/abseil/absl/synchronization/mutex.h
+++ /dev/null
@@ -1,1084 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// mutex.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines a `Mutex` -- a mutually exclusive lock -- and the
-// most common type of synchronization primitive for facilitating locks on
-// shared resources. A mutex is used to prevent multiple threads from accessing
-// and/or writing to a shared resource concurrently.
-//
-// Unlike a `std::mutex`, the Abseil `Mutex` provides the following additional
-// features:
-//   * Conditional predicates intrinsic to the `Mutex` object
-//   * Shared/reader locks, in addition to standard exclusive/writer locks
-//   * Deadlock detection and debug support.
-//
-// The following helper classes are also defined within this file:
-//
-//  MutexLock - An RAII wrapper to acquire and release a `Mutex` for exclusive/
-//              write access within the current scope.
-//
-//  ReaderMutexLock
-//            - An RAII wrapper to acquire and release a `Mutex` for shared/read
-//              access within the current scope.
-//
-//  WriterMutexLock
-//            - Effectively an alias for `MutexLock` above, designed for use in
-//              distinguishing reader and writer locks within code.
-//
-// In addition to simple mutex locks, this file also defines ways to perform
-// locking under certain conditions.
-//
-//  Condition - (Preferred) Used to wait for a particular predicate that
-//              depends on state protected by the `Mutex` to become true.
-//  CondVar   - A lower-level variant of `Condition` that relies on
-//              application code to explicitly signal the `CondVar` when
-//              a condition has been met.
-//
-// See below for more information on using `Condition` or `CondVar`.
-//
-// Mutexes and mutex behavior can be quite complicated. The information within
-// this header file is limited, as a result. Please consult the Mutex guide for
-// more complete information and examples.
-
-#ifndef ABSL_SYNCHRONIZATION_MUTEX_H_
-#define ABSL_SYNCHRONIZATION_MUTEX_H_
-
-#include <atomic>
-#include <cstdint>
-#include <string>
-
-#include "absl/base/const_init.h"
-#include "absl/base/internal/identity.h"
-#include "absl/base/internal/low_level_alloc.h"
-#include "absl/base/internal/thread_identity.h"
-#include "absl/base/internal/tsan_mutex_interface.h"
-#include "absl/base/port.h"
-#include "absl/base/thread_annotations.h"
-#include "absl/synchronization/internal/kernel_timeout.h"
-#include "absl/synchronization/internal/per_thread_sem.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class Condition;
-struct SynchWaitParams;
-
-// -----------------------------------------------------------------------------
-// Mutex
-// -----------------------------------------------------------------------------
-//
-// A `Mutex` is a non-reentrant (aka non-recursive) Mutually Exclusive lock
-// on some resource, typically a variable or data structure with associated
-// invariants. Proper usage of mutexes prevents concurrent access by different
-// threads to the same resource.
-//
-// A `Mutex` has two basic operations: `Mutex::Lock()` and `Mutex::Unlock()`.
-// The `Lock()` operation *acquires* a `Mutex` (in a state known as an
-// *exclusive* -- or write -- lock), while the `Unlock()` operation *releases* a
-// Mutex. During the span of time between the Lock() and Unlock() operations,
-// a mutex is said to be *held*. By design all mutexes support exclusive/write
-// locks, as this is the most common way to use a mutex.
-//
-// The `Mutex` state machine for basic lock/unlock operations is quite simple:
-//
-// |                | Lock()     | Unlock() |
-// |----------------+------------+----------|
-// | Free           | Exclusive  | invalid  |
-// | Exclusive      | blocks     | Free     |
-//
-// Attempts to `Unlock()` must originate from the thread that performed the
-// corresponding `Lock()` operation.
-//
-// An "invalid" operation is disallowed by the API. The `Mutex` implementation
-// is allowed to do anything on an invalid call, including but not limited to
-// crashing with a useful error message, silently succeeding, or corrupting
-// data structures. In debug mode, the implementation attempts to crash with a
-// useful error message.
-//
-// `Mutex` is not guaranteed to be "fair" in prioritizing waiting threads; it
-// is, however, approximately fair over long periods, and starvation-free for
-// threads at the same priority.
-//
-// The lock/unlock primitives are now annotated with lock annotations
-// defined in (base/thread_annotations.h). When writing multi-threaded code,
-// you should use lock annotations whenever possible to document your lock
-// synchronization policy. Besides acting as documentation, these annotations
-// also help compilers or static analysis tools to identify and warn about
-// issues that could potentially result in race conditions and deadlocks.
-//
-// For more information about the lock annotations, please see
-// [Thread Safety Analysis](http://clang.llvm.org/docs/ThreadSafetyAnalysis.html)
-// in the Clang documentation.
-//
-// See also `MutexLock`, below, for scoped `Mutex` acquisition.
-
-class ABSL_LOCKABLE Mutex {
- public:
-  // Creates a `Mutex` that is not held by anyone. This constructor is
-  // typically used for Mutexes allocated on the heap or the stack.
-  //
-  // To create `Mutex` instances with static storage duration
-  // (e.g. a namespace-scoped or global variable), see
-  // `Mutex::Mutex(absl::kConstInit)` below instead.
-  Mutex();
-
-  // Creates a mutex with static storage duration.  A global variable
-  // constructed this way avoids the lifetime issues that can occur on program
-  // startup and shutdown.  (See absl/base/const_init.h.)
-  //
-  // For Mutexes allocated on the heap and stack, instead use the default
-  // constructor, which can interact more fully with the thread sanitizer.
-  //
-  // Example usage:
-  //   namespace foo {
-  //   ABSL_CONST_INIT Mutex mu(absl::kConstInit);
-  //   }
-  explicit constexpr Mutex(absl::ConstInitType);
-
-  ~Mutex();
-
-  // Mutex::Lock()
-  //
-  // Blocks the calling thread, if necessary, until this `Mutex` is free, and
-  // then acquires it exclusively. (This lock is also known as a "write lock.")
-  void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION();
-
-  // Mutex::Unlock()
-  //
-  // Releases this `Mutex` and returns it from the exclusive/write state to the
-  // free state. Caller must hold the `Mutex` exclusively.
-  void Unlock() ABSL_UNLOCK_FUNCTION();
-
-  // Mutex::TryLock()
-  //
-  // If the mutex can be acquired without blocking, does so exclusively and
-  // returns `true`. Otherwise, returns `false`. Returns `true` with high
-  // probability if the `Mutex` was free.
-  bool TryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true);
-
-  // Mutex::AssertHeld()
-  //
-  // Return immediately if this thread holds the `Mutex` exclusively (in write
-  // mode). Otherwise, may report an error (typically by crashing with a
-  // diagnostic), or may return immediately.
-  void AssertHeld() const ABSL_ASSERT_EXCLUSIVE_LOCK();
-
-  // ---------------------------------------------------------------------------
-  // Reader-Writer Locking
-  // ---------------------------------------------------------------------------
-
-  // A Mutex can also be used as a starvation-free reader-writer lock.
-  // Neither read-locks nor write-locks are reentrant/recursive to avoid
-  // potential client programming errors.
-  //
-  // The Mutex API provides `Writer*()` aliases for the existing `Lock()`,
-  // `Unlock()` and `TryLock()` methods for use within applications mixing
-  // reader/writer locks. Using `Reader*()` and `Writer*()` operations in this
-  // manner can make locking behavior clearer when mixing read and write modes.
-  //
-  // Introducing reader locks necessarily complicates the `Mutex` state
-  // machine somewhat. The table below illustrates the allowed state transitions
-  // of a mutex in such cases. Note that ReaderLock() may block even if the lock
-  // is held in shared mode; this occurs when another thread is blocked on a
-  // call to WriterLock().
-  //
-  // ---------------------------------------------------------------------------
-  //     Operation: WriterLock() Unlock()  ReaderLock()           ReaderUnlock()
-  // ---------------------------------------------------------------------------
-  // State
-  // ---------------------------------------------------------------------------
-  // Free           Exclusive    invalid   Shared(1)              invalid
-  // Shared(1)      blocks       invalid   Shared(2) or blocks    Free
-  // Shared(n) n>1  blocks       invalid   Shared(n+1) or blocks  Shared(n-1)
-  // Exclusive      blocks       Free      blocks                 invalid
-  // ---------------------------------------------------------------------------
-  //
-  // In comments below, "shared" refers to a state of Shared(n) for any n > 0.
-
-  // Mutex::ReaderLock()
-  //
-  // Blocks the calling thread, if necessary, until this `Mutex` is either free,
-  // or in shared mode, and then acquires a share of it. Note that
-  // `ReaderLock()` will block if some other thread has an exclusive/writer lock
-  // on the mutex.
-
-  void ReaderLock() ABSL_SHARED_LOCK_FUNCTION();
-
-  // Mutex::ReaderUnlock()
-  //
-  // Releases a read share of this `Mutex`. `ReaderUnlock` may return a mutex to
-  // the free state if this thread holds the last reader lock on the mutex. Note
-  // that you cannot call `ReaderUnlock()` on a mutex held in write mode.
-  void ReaderUnlock() ABSL_UNLOCK_FUNCTION();
-
-  // Mutex::ReaderTryLock()
-  //
-  // If the mutex can be acquired without blocking, acquires this mutex for
-  // shared access and returns `true`. Otherwise, returns `false`. Returns
-  // `true` with high probability if the `Mutex` was free or shared.
-  bool ReaderTryLock() ABSL_SHARED_TRYLOCK_FUNCTION(true);
-
-  // Mutex::AssertReaderHeld()
-  //
-  // Returns immediately if this thread holds the `Mutex` in at least shared
-  // mode (read mode). Otherwise, may report an error (typically by
-  // crashing with a diagnostic), or may return immediately.
-  void AssertReaderHeld() const ABSL_ASSERT_SHARED_LOCK();
-
-  // Mutex::WriterLock()
-  // Mutex::WriterUnlock()
-  // Mutex::WriterTryLock()
-  //
-  // Aliases for `Mutex::Lock()`, `Mutex::Unlock()`, and `Mutex::TryLock()`.
-  //
-  // These methods may be used (along with the complementary `Reader*()`
-  // methods) to distingish simple exclusive `Mutex` usage (`Lock()`,
-  // etc.) from reader/writer lock usage.
-  void WriterLock() ABSL_EXCLUSIVE_LOCK_FUNCTION() { this->Lock(); }
-
-  void WriterUnlock() ABSL_UNLOCK_FUNCTION() { this->Unlock(); }
-
-  bool WriterTryLock() ABSL_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
-    return this->TryLock();
-  }
-
-  // ---------------------------------------------------------------------------
-  // Conditional Critical Regions
-  // ---------------------------------------------------------------------------
-
-  // Conditional usage of a `Mutex` can occur using two distinct paradigms:
-  //
-  //   * Use of `Mutex` member functions with `Condition` objects.
-  //   * Use of the separate `CondVar` abstraction.
-  //
-  // In general, prefer use of `Condition` and the `Mutex` member functions
-  // listed below over `CondVar`. When there are multiple threads waiting on
-  // distinctly different conditions, however, a battery of `CondVar`s may be
-  // more efficient. This section discusses use of `Condition` objects.
-  //
-  // `Mutex` contains member functions for performing lock operations only under
-  // certain conditions, of class `Condition`. For correctness, the `Condition`
-  // must return a boolean that is a pure function, only of state protected by
-  // the `Mutex`. The condition must be invariant w.r.t. environmental state
-  // such as thread, cpu id, or time, and must be `noexcept`. The condition will
-  // always be invoked with the mutex held in at least read mode, so you should
-  // not block it for long periods or sleep it on a timer.
-  //
-  // Since a condition must not depend directly on the current time, use
-  // `*WithTimeout()` member function variants to make your condition
-  // effectively true after a given duration, or `*WithDeadline()` variants to
-  // make your condition effectively true after a given time.
-  //
-  // The condition function should have no side-effects aside from debug
-  // logging; as a special exception, the function may acquire other mutexes
-  // provided it releases all those that it acquires.  (This exception was
-  // required to allow logging.)
-
-  // Mutex::Await()
-  //
-  // Unlocks this `Mutex` and blocks until simultaneously both `cond` is `true`
-  // and this `Mutex` can be reacquired, then reacquires this `Mutex` in the
-  // same mode in which it was previously held. If the condition is initially
-  // `true`, `Await()` *may* skip the release/re-acquire step.
-  //
-  // `Await()` requires that this thread holds this `Mutex` in some mode.
-  void Await(const Condition &cond);
-
-  // Mutex::LockWhen()
-  // Mutex::ReaderLockWhen()
-  // Mutex::WriterLockWhen()
-  //
-  // Blocks until simultaneously both `cond` is `true` and this `Mutex` can
-  // be acquired, then atomically acquires this `Mutex`. `LockWhen()` is
-  // logically equivalent to `*Lock(); Await();` though they may have different
-  // performance characteristics.
-  void LockWhen(const Condition &cond) ABSL_EXCLUSIVE_LOCK_FUNCTION();
-
-  void ReaderLockWhen(const Condition &cond) ABSL_SHARED_LOCK_FUNCTION();
-
-  void WriterLockWhen(const Condition &cond) ABSL_EXCLUSIVE_LOCK_FUNCTION() {
-    this->LockWhen(cond);
-  }
-
-  // ---------------------------------------------------------------------------
-  // Mutex Variants with Timeouts/Deadlines
-  // ---------------------------------------------------------------------------
-
-  // Mutex::AwaitWithTimeout()
-  // Mutex::AwaitWithDeadline()
-  //
-  // Unlocks this `Mutex` and blocks until simultaneously:
-  //   - either `cond` is true or the {timeout has expired, deadline has passed}
-  //     and
-  //   - this `Mutex` can be reacquired,
-  // then reacquire this `Mutex` in the same mode in which it was previously
-  // held, returning `true` iff `cond` is `true` on return.
-  //
-  // If the condition is initially `true`, the implementation *may* skip the
-  // release/re-acquire step and return immediately.
-  //
-  // Deadlines in the past are equivalent to an immediate deadline.
-  // Negative timeouts are equivalent to a zero timeout.
-  //
-  // This method requires that this thread holds this `Mutex` in some mode.
-  bool AwaitWithTimeout(const Condition &cond, absl::Duration timeout);
-
-  bool AwaitWithDeadline(const Condition &cond, absl::Time deadline);
-
-  // Mutex::LockWhenWithTimeout()
-  // Mutex::ReaderLockWhenWithTimeout()
-  // Mutex::WriterLockWhenWithTimeout()
-  //
-  // Blocks until simultaneously both:
-  //   - either `cond` is `true` or the timeout has expired, and
-  //   - this `Mutex` can be acquired,
-  // then atomically acquires this `Mutex`, returning `true` iff `cond` is
-  // `true` on return.
-  //
-  // Negative timeouts are equivalent to a zero timeout.
-  bool LockWhenWithTimeout(const Condition &cond, absl::Duration timeout)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION();
-  bool ReaderLockWhenWithTimeout(const Condition &cond, absl::Duration timeout)
-      ABSL_SHARED_LOCK_FUNCTION();
-  bool WriterLockWhenWithTimeout(const Condition &cond, absl::Duration timeout)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION() {
-    return this->LockWhenWithTimeout(cond, timeout);
-  }
-
-  // Mutex::LockWhenWithDeadline()
-  // Mutex::ReaderLockWhenWithDeadline()
-  // Mutex::WriterLockWhenWithDeadline()
-  //
-  // Blocks until simultaneously both:
-  //   - either `cond` is `true` or the deadline has been passed, and
-  //   - this `Mutex` can be acquired,
-  // then atomically acquires this Mutex, returning `true` iff `cond` is `true`
-  // on return.
-  //
-  // Deadlines in the past are equivalent to an immediate deadline.
-  bool LockWhenWithDeadline(const Condition &cond, absl::Time deadline)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION();
-  bool ReaderLockWhenWithDeadline(const Condition &cond, absl::Time deadline)
-      ABSL_SHARED_LOCK_FUNCTION();
-  bool WriterLockWhenWithDeadline(const Condition &cond, absl::Time deadline)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION() {
-    return this->LockWhenWithDeadline(cond, deadline);
-  }
-
-  // ---------------------------------------------------------------------------
-  // Debug Support: Invariant Checking, Deadlock Detection, Logging.
-  // ---------------------------------------------------------------------------
-
-  // Mutex::EnableInvariantDebugging()
-  //
-  // If `invariant`!=null and if invariant debugging has been enabled globally,
-  // cause `(*invariant)(arg)` to be called at moments when the invariant for
-  // this `Mutex` should hold (for example: just after acquire, just before
-  // release).
-  //
-  // The routine `invariant` should have no side-effects since it is not
-  // guaranteed how many times it will be called; it should check the invariant
-  // and crash if it does not hold. Enabling global invariant debugging may
-  // substantially reduce `Mutex` performance; it should be set only for
-  // non-production runs.  Optimization options may also disable invariant
-  // checks.
-  void EnableInvariantDebugging(void (*invariant)(void *), void *arg);
-
-  // Mutex::EnableDebugLog()
-  //
-  // Cause all subsequent uses of this `Mutex` to be logged via
-  // `ABSL_RAW_LOG(INFO)`. Log entries are tagged with `name` if no previous
-  // call to `EnableInvariantDebugging()` or `EnableDebugLog()` has been made.
-  //
-  // Note: This method substantially reduces `Mutex` performance.
-  void EnableDebugLog(const char *name);
-
-  // Deadlock detection
-
-  // Mutex::ForgetDeadlockInfo()
-  //
-  // Forget any deadlock-detection information previously gathered
-  // about this `Mutex`. Call this method in debug mode when the lock ordering
-  // of a `Mutex` changes.
-  void ForgetDeadlockInfo();
-
-  // Mutex::AssertNotHeld()
-  //
-  // Return immediately if this thread does not hold this `Mutex` in any
-  // mode; otherwise, may report an error (typically by crashing with a
-  // diagnostic), or may return immediately.
-  //
-  // Currently this check is performed only if all of:
-  //    - in debug mode
-  //    - SetMutexDeadlockDetectionMode() has been set to kReport or kAbort
-  //    - number of locks concurrently held by this thread is not large.
-  // are true.
-  void AssertNotHeld() const;
-
-  // Special cases.
-
-  // A `MuHow` is a constant that indicates how a lock should be acquired.
-  // Internal implementation detail.  Clients should ignore.
-  typedef const struct MuHowS *MuHow;
-
-  // Mutex::InternalAttemptToUseMutexInFatalSignalHandler()
-  //
-  // Causes the `Mutex` implementation to prepare itself for re-entry caused by
-  // future use of `Mutex` within a fatal signal handler. This method is
-  // intended for use only for last-ditch attempts to log crash information.
-  // It does not guarantee that attempts to use Mutexes within the handler will
-  // not deadlock; it merely makes other faults less likely.
-  //
-  // WARNING:  This routine must be invoked from a signal handler, and the
-  // signal handler must either loop forever or terminate the process.
-  // Attempts to return from (or `longjmp` out of) the signal handler once this
-  // call has been made may cause arbitrary program behaviour including
-  // crashes and deadlocks.
-  static void InternalAttemptToUseMutexInFatalSignalHandler();
-
- private:
-  std::atomic<intptr_t> mu_;  // The Mutex state.
-
-  // Post()/Wait() versus associated PerThreadSem; in class for required
-  // friendship with PerThreadSem.
-  static inline void IncrementSynchSem(Mutex *mu,
-                                       base_internal::PerThreadSynch *w);
-  static inline bool DecrementSynchSem(
-      Mutex *mu, base_internal::PerThreadSynch *w,
-      synchronization_internal::KernelTimeout t);
-
-  // slow path acquire
-  void LockSlowLoop(SynchWaitParams *waitp, int flags);
-  // wrappers around LockSlowLoop()
-  bool LockSlowWithDeadline(MuHow how, const Condition *cond,
-                            synchronization_internal::KernelTimeout t,
-                            int flags);
-  void LockSlow(MuHow how, const Condition *cond,
-                int flags) ABSL_ATTRIBUTE_COLD;
-  // slow path release
-  void UnlockSlow(SynchWaitParams *waitp) ABSL_ATTRIBUTE_COLD;
-  // Common code between Await() and AwaitWithTimeout/Deadline()
-  bool AwaitCommon(const Condition &cond,
-                   synchronization_internal::KernelTimeout t);
-  // Attempt to remove thread s from queue.
-  void TryRemove(base_internal::PerThreadSynch *s);
-  // Block a thread on mutex.
-  void Block(base_internal::PerThreadSynch *s);
-  // Wake a thread; return successor.
-  base_internal::PerThreadSynch *Wakeup(base_internal::PerThreadSynch *w);
-
-  friend class CondVar;   // for access to Trans()/Fer().
-  void Trans(MuHow how);  // used for CondVar->Mutex transfer
-  void Fer(
-      base_internal::PerThreadSynch *w);  // used for CondVar->Mutex transfer
-
-  // Catch the error of writing Mutex when intending MutexLock.
-  Mutex(const volatile Mutex * /*ignored*/) {}  // NOLINT(runtime/explicit)
-
-  Mutex(const Mutex&) = delete;
-  Mutex& operator=(const Mutex&) = delete;
-};
-
-// -----------------------------------------------------------------------------
-// Mutex RAII Wrappers
-// -----------------------------------------------------------------------------
-
-// MutexLock
-//
-// `MutexLock` is a helper class, which acquires and releases a `Mutex` via
-// RAII.
-//
-// Example:
-//
-// Class Foo {
-//  public:
-//   Foo::Bar* Baz() {
-//     MutexLock lock(&mu_);
-//     ...
-//     return bar;
-//   }
-//
-// private:
-//   Mutex mu_;
-// };
-class ABSL_SCOPED_LOCKABLE MutexLock {
- public:
-  // Constructors
-
-  // Calls `mu->Lock()` and returns when that call returns. That is, `*mu` is
-  // guaranteed to be locked when this object is constructed. Requires that
-  // `mu` be dereferenceable.
-  explicit MutexLock(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu) : mu_(mu) {
-    this->mu_->Lock();
-  }
-
-  // Like above, but calls `mu->LockWhen(cond)` instead. That is, in addition to
-  // the above, the condition given by `cond` is also guaranteed to hold when
-  // this object is constructed.
-  explicit MutexLock(Mutex *mu, const Condition &cond)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    this->mu_->LockWhen(cond);
-  }
-
-  MutexLock(const MutexLock &) = delete;  // NOLINT(runtime/mutex)
-  MutexLock(MutexLock&&) = delete;  // NOLINT(runtime/mutex)
-  MutexLock& operator=(const MutexLock&) = delete;
-  MutexLock& operator=(MutexLock&&) = delete;
-
-  ~MutexLock() ABSL_UNLOCK_FUNCTION() { this->mu_->Unlock(); }
-
- private:
-  Mutex *const mu_;
-};
-
-// ReaderMutexLock
-//
-// The `ReaderMutexLock` is a helper class, like `MutexLock`, which acquires and
-// releases a shared lock on a `Mutex` via RAII.
-class ABSL_SCOPED_LOCKABLE ReaderMutexLock {
- public:
-  explicit ReaderMutexLock(Mutex *mu) ABSL_SHARED_LOCK_FUNCTION(mu) : mu_(mu) {
-    mu->ReaderLock();
-  }
-
-  explicit ReaderMutexLock(Mutex *mu, const Condition &cond)
-      ABSL_SHARED_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    mu->ReaderLockWhen(cond);
-  }
-
-  ReaderMutexLock(const ReaderMutexLock&) = delete;
-  ReaderMutexLock(ReaderMutexLock&&) = delete;
-  ReaderMutexLock& operator=(const ReaderMutexLock&) = delete;
-  ReaderMutexLock& operator=(ReaderMutexLock&&) = delete;
-
-  ~ReaderMutexLock() ABSL_UNLOCK_FUNCTION() { this->mu_->ReaderUnlock(); }
-
- private:
-  Mutex *const mu_;
-};
-
-// WriterMutexLock
-//
-// The `WriterMutexLock` is a helper class, like `MutexLock`, which acquires and
-// releases a write (exclusive) lock on a `Mutex` via RAII.
-class ABSL_SCOPED_LOCKABLE WriterMutexLock {
- public:
-  explicit WriterMutexLock(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    mu->WriterLock();
-  }
-
-  explicit WriterMutexLock(Mutex *mu, const Condition &cond)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    mu->WriterLockWhen(cond);
-  }
-
-  WriterMutexLock(const WriterMutexLock&) = delete;
-  WriterMutexLock(WriterMutexLock&&) = delete;
-  WriterMutexLock& operator=(const WriterMutexLock&) = delete;
-  WriterMutexLock& operator=(WriterMutexLock&&) = delete;
-
-  ~WriterMutexLock() ABSL_UNLOCK_FUNCTION() { this->mu_->WriterUnlock(); }
-
- private:
-  Mutex *const mu_;
-};
-
-// -----------------------------------------------------------------------------
-// Condition
-// -----------------------------------------------------------------------------
-//
-// As noted above, `Mutex` contains a number of member functions which take a
-// `Condition` as an argument; clients can wait for conditions to become `true`
-// before attempting to acquire the mutex. These sections are known as
-// "condition critical" sections. To use a `Condition`, you simply need to
-// construct it, and use within an appropriate `Mutex` member function;
-// everything else in the `Condition` class is an implementation detail.
-//
-// A `Condition` is specified as a function pointer which returns a boolean.
-// `Condition` functions should be pure functions -- their results should depend
-// only on passed arguments, should not consult any external state (such as
-// clocks), and should have no side-effects, aside from debug logging. Any
-// objects that the function may access should be limited to those which are
-// constant while the mutex is blocked on the condition (e.g. a stack variable),
-// or objects of state protected explicitly by the mutex.
-//
-// No matter which construction is used for `Condition`, the underlying
-// function pointer / functor / callable must not throw any
-// exceptions. Correctness of `Mutex` / `Condition` is not guaranteed in
-// the face of a throwing `Condition`. (When Abseil is allowed to depend
-// on C++17, these function pointers will be explicitly marked
-// `noexcept`; until then this requirement cannot be enforced in the
-// type system.)
-//
-// Note: to use a `Condition`, you need only construct it and pass it to a
-// suitable `Mutex' member function, such as `Mutex::Await()`, or to the
-// constructor of one of the scope guard classes.
-//
-// Example using LockWhen/Unlock:
-//
-//   // assume count_ is not internal reference count
-//   int count_ ABSL_GUARDED_BY(mu_);
-//   Condition count_is_zero(+[](int *count) { return *count == 0; }, &count_);
-//
-//   mu_.LockWhen(count_is_zero);
-//   // ...
-//   mu_.Unlock();
-//
-// Example using a scope guard:
-//
-//   {
-//     MutexLock lock(&mu_, count_is_zero);
-//     // ...
-//   }
-//
-// When multiple threads are waiting on exactly the same condition, make sure
-// that they are constructed with the same parameters (same pointer to function
-// + arg, or same pointer to object + method), so that the mutex implementation
-// can avoid redundantly evaluating the same condition for each thread.
-class Condition {
- public:
-  // A Condition that returns the result of "(*func)(arg)"
-  Condition(bool (*func)(void *), void *arg);
-
-  // Templated version for people who are averse to casts.
-  //
-  // To use a lambda, prepend it with unary plus, which converts the lambda
-  // into a function pointer:
-  //     Condition(+[](T* t) { return ...; }, arg).
-  //
-  // Note: lambdas in this case must contain no bound variables.
-  //
-  // See class comment for performance advice.
-  template<typename T>
-  Condition(bool (*func)(T *), T *arg);
-
-  // Templated version for invoking a method that returns a `bool`.
-  //
-  // `Condition(object, &Class::Method)` constructs a `Condition` that evaluates
-  // `object->Method()`.
-  //
-  // Implementation Note: `absl::internal::identity` is used to allow methods to
-  // come from base classes. A simpler signature like
-  // `Condition(T*, bool (T::*)())` does not suffice.
-  template<typename T>
-  Condition(T *object, bool (absl::internal::identity<T>::type::* method)());
-
-  // Same as above, for const members
-  template<typename T>
-  Condition(const T *object,
-            bool (absl::internal::identity<T>::type::* method)() const);
-
-  // A Condition that returns the value of `*cond`
-  explicit Condition(const bool *cond);
-
-  // Templated version for invoking a functor that returns a `bool`.
-  // This approach accepts pointers to non-mutable lambdas, `std::function`,
-  // the result of` std::bind` and user-defined functors that define
-  // `bool F::operator()() const`.
-  //
-  // Example:
-  //
-  //   auto reached = [this, current]() {
-  //     mu_.AssertReaderHeld();                // For annotalysis.
-  //     return processed_ >= current;
-  //   };
-  //   mu_.Await(Condition(&reached));
-  //
-  // NOTE: never use "mu_.AssertHeld()" instead of "mu_.AssertReaderHeld()" in
-  // the lambda as it may be called when the mutex is being unlocked from a
-  // scope holding only a reader lock, which will make the assertion not
-  // fulfilled and crash the binary.
-
-  // See class comment for performance advice. In particular, if there
-  // might be more than one waiter for the same condition, make sure
-  // that all waiters construct the condition with the same pointers.
-
-  // Implementation note: The second template parameter ensures that this
-  // constructor doesn't participate in overload resolution if T doesn't have
-  // `bool operator() const`.
-  template <typename T, typename E = decltype(
-      static_cast<bool (T::*)() const>(&T::operator()))>
-  explicit Condition(const T *obj)
-      : Condition(obj, static_cast<bool (T::*)() const>(&T::operator())) {}
-
-  // A Condition that always returns `true`.
-  static const Condition kTrue;
-
-  // Evaluates the condition.
-  bool Eval() const;
-
-  // Returns `true` if the two conditions are guaranteed to return the same
-  // value if evaluated at the same time, `false` if the evaluation *may* return
-  // different results.
-  //
-  // Two `Condition` values are guaranteed equal if both their `func` and `arg`
-  // components are the same. A null pointer is equivalent to a `true`
-  // condition.
-  static bool GuaranteedEqual(const Condition *a, const Condition *b);
-
- private:
-  typedef bool (*InternalFunctionType)(void * arg);
-  typedef bool (Condition::*InternalMethodType)();
-  typedef bool (*InternalMethodCallerType)(void * arg,
-                                           InternalMethodType internal_method);
-
-  bool (*eval_)(const Condition*);  // Actual evaluator
-  InternalFunctionType function_;   // function taking pointer returning bool
-  InternalMethodType method_;       // method returning bool
-  void *arg_;                       // arg of function_ or object of method_
-
-  Condition();        // null constructor used only to create kTrue
-
-  // Various functions eval_ can point to:
-  static bool CallVoidPtrFunction(const Condition*);
-  template <typename T> static bool CastAndCallFunction(const Condition* c);
-  template <typename T> static bool CastAndCallMethod(const Condition* c);
-};
-
-// -----------------------------------------------------------------------------
-// CondVar
-// -----------------------------------------------------------------------------
-//
-// A condition variable, reflecting state evaluated separately outside of the
-// `Mutex` object, which can be signaled to wake callers.
-// This class is not normally needed; use `Mutex` member functions such as
-// `Mutex::Await()` and intrinsic `Condition` abstractions. In rare cases
-// with many threads and many conditions, `CondVar` may be faster.
-//
-// The implementation may deliver signals to any condition variable at
-// any time, even when no call to `Signal()` or `SignalAll()` is made; as a
-// result, upon being awoken, you must check the logical condition you have
-// been waiting upon.
-//
-// Examples:
-//
-// Usage for a thread waiting for some condition C protected by mutex mu:
-//       mu.Lock();
-//       while (!C) { cv->Wait(&mu); }        // releases and reacquires mu
-//       //  C holds; process data
-//       mu.Unlock();
-//
-// Usage to wake T is:
-//       mu.Lock();
-//      // process data, possibly establishing C
-//      if (C) { cv->Signal(); }
-//      mu.Unlock();
-//
-// If C may be useful to more than one waiter, use `SignalAll()` instead of
-// `Signal()`.
-//
-// With this implementation it is efficient to use `Signal()/SignalAll()` inside
-// the locked region; this usage can make reasoning about your program easier.
-//
-class CondVar {
- public:
-  // A `CondVar` allocated on the heap or on the stack can use the this
-  // constructor.
-  CondVar();
-  ~CondVar();
-
-  // CondVar::Wait()
-  //
-  // Atomically releases a `Mutex` and blocks on this condition variable.
-  // Waits until awakened by a call to `Signal()` or `SignalAll()` (or a
-  // spurious wakeup), then reacquires the `Mutex` and returns.
-  //
-  // Requires and ensures that the current thread holds the `Mutex`.
-  void Wait(Mutex *mu);
-
-  // CondVar::WaitWithTimeout()
-  //
-  // Atomically releases a `Mutex` and blocks on this condition variable.
-  // Waits until awakened by a call to `Signal()` or `SignalAll()` (or a
-  // spurious wakeup), or until the timeout has expired, then reacquires
-  // the `Mutex` and returns.
-  //
-  // Returns true if the timeout has expired without this `CondVar`
-  // being signalled in any manner. If both the timeout has expired
-  // and this `CondVar` has been signalled, the implementation is free
-  // to return `true` or `false`.
-  //
-  // Requires and ensures that the current thread holds the `Mutex`.
-  bool WaitWithTimeout(Mutex *mu, absl::Duration timeout);
-
-  // CondVar::WaitWithDeadline()
-  //
-  // Atomically releases a `Mutex` and blocks on this condition variable.
-  // Waits until awakened by a call to `Signal()` or `SignalAll()` (or a
-  // spurious wakeup), or until the deadline has passed, then reacquires
-  // the `Mutex` and returns.
-  //
-  // Deadlines in the past are equivalent to an immediate deadline.
-  //
-  // Returns true if the deadline has passed without this `CondVar`
-  // being signalled in any manner. If both the deadline has passed
-  // and this `CondVar` has been signalled, the implementation is free
-  // to return `true` or `false`.
-  //
-  // Requires and ensures that the current thread holds the `Mutex`.
-  bool WaitWithDeadline(Mutex *mu, absl::Time deadline);
-
-  // CondVar::Signal()
-  //
-  // Signal this `CondVar`; wake at least one waiter if one exists.
-  void Signal();
-
-  // CondVar::SignalAll()
-  //
-  // Signal this `CondVar`; wake all waiters.
-  void SignalAll();
-
-  // CondVar::EnableDebugLog()
-  //
-  // Causes all subsequent uses of this `CondVar` to be logged via
-  // `ABSL_RAW_LOG(INFO)`. Log entries are tagged with `name` if `name != 0`.
-  // Note: this method substantially reduces `CondVar` performance.
-  void EnableDebugLog(const char *name);
-
- private:
-  bool WaitCommon(Mutex *mutex, synchronization_internal::KernelTimeout t);
-  void Remove(base_internal::PerThreadSynch *s);
-  void Wakeup(base_internal::PerThreadSynch *w);
-  std::atomic<intptr_t> cv_;  // Condition variable state.
-  CondVar(const CondVar&) = delete;
-  CondVar& operator=(const CondVar&) = delete;
-};
-
-
-// Variants of MutexLock.
-//
-// If you find yourself using one of these, consider instead using
-// Mutex::Unlock() and/or if-statements for clarity.
-
-// MutexLockMaybe
-//
-// MutexLockMaybe is like MutexLock, but is a no-op when mu is null.
-class ABSL_SCOPED_LOCKABLE MutexLockMaybe {
- public:
-  explicit MutexLockMaybe(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    if (this->mu_ != nullptr) {
-      this->mu_->Lock();
-    }
-  }
-
-  explicit MutexLockMaybe(Mutex *mu, const Condition &cond)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    if (this->mu_ != nullptr) {
-      this->mu_->LockWhen(cond);
-    }
-  }
-
-  ~MutexLockMaybe() ABSL_UNLOCK_FUNCTION() {
-    if (this->mu_ != nullptr) { this->mu_->Unlock(); }
-  }
-
- private:
-  Mutex *const mu_;
-  MutexLockMaybe(const MutexLockMaybe&) = delete;
-  MutexLockMaybe(MutexLockMaybe&&) = delete;
-  MutexLockMaybe& operator=(const MutexLockMaybe&) = delete;
-  MutexLockMaybe& operator=(MutexLockMaybe&&) = delete;
-};
-
-// ReleasableMutexLock
-//
-// ReleasableMutexLock is like MutexLock, but permits `Release()` of its
-// mutex before destruction. `Release()` may be called at most once.
-class ABSL_SCOPED_LOCKABLE ReleasableMutexLock {
- public:
-  explicit ReleasableMutexLock(Mutex *mu) ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    this->mu_->Lock();
-  }
-
-  explicit ReleasableMutexLock(Mutex *mu, const Condition &cond)
-      ABSL_EXCLUSIVE_LOCK_FUNCTION(mu)
-      : mu_(mu) {
-    this->mu_->LockWhen(cond);
-  }
-
-  ~ReleasableMutexLock() ABSL_UNLOCK_FUNCTION() {
-    if (this->mu_ != nullptr) { this->mu_->Unlock(); }
-  }
-
-  void Release() ABSL_UNLOCK_FUNCTION();
-
- private:
-  Mutex *mu_;
-  ReleasableMutexLock(const ReleasableMutexLock&) = delete;
-  ReleasableMutexLock(ReleasableMutexLock&&) = delete;
-  ReleasableMutexLock& operator=(const ReleasableMutexLock&) = delete;
-  ReleasableMutexLock& operator=(ReleasableMutexLock&&) = delete;
-};
-
-inline Mutex::Mutex() : mu_(0) {
-  ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static);
-}
-
-inline constexpr Mutex::Mutex(absl::ConstInitType) : mu_(0) {}
-
-inline CondVar::CondVar() : cv_(0) {}
-
-// static
-template <typename T>
-bool Condition::CastAndCallMethod(const Condition *c) {
-  typedef bool (T::*MemberType)();
-  MemberType rm = reinterpret_cast<MemberType>(c->method_);
-  T *x = static_cast<T *>(c->arg_);
-  return (x->*rm)();
-}
-
-// static
-template <typename T>
-bool Condition::CastAndCallFunction(const Condition *c) {
-  typedef bool (*FuncType)(T *);
-  FuncType fn = reinterpret_cast<FuncType>(c->function_);
-  T *x = static_cast<T *>(c->arg_);
-  return (*fn)(x);
-}
-
-template <typename T>
-inline Condition::Condition(bool (*func)(T *), T *arg)
-    : eval_(&CastAndCallFunction<T>),
-      function_(reinterpret_cast<InternalFunctionType>(func)),
-      method_(nullptr),
-      arg_(const_cast<void *>(static_cast<const void *>(arg))) {}
-
-template <typename T>
-inline Condition::Condition(T *object,
-                            bool (absl::internal::identity<T>::type::*method)())
-    : eval_(&CastAndCallMethod<T>),
-      function_(nullptr),
-      method_(reinterpret_cast<InternalMethodType>(method)),
-      arg_(object) {}
-
-template <typename T>
-inline Condition::Condition(const T *object,
-                            bool (absl::internal::identity<T>::type::*method)()
-                                const)
-    : eval_(&CastAndCallMethod<T>),
-      function_(nullptr),
-      method_(reinterpret_cast<InternalMethodType>(method)),
-      arg_(reinterpret_cast<void *>(const_cast<T *>(object))) {}
-
-// Register a hook for profiling support.
-//
-// The function pointer registered here will be called whenever a mutex is
-// contended.  The callback is given the absl/base/cycleclock.h timestamp when
-// waiting began.
-//
-// Calls to this function do not race or block, but there is no ordering
-// guaranteed between calls to this function and call to the provided hook.
-// In particular, the previously registered hook may still be called for some
-// time after this function returns.
-void RegisterMutexProfiler(void (*fn)(int64_t wait_timestamp));
-
-// Register a hook for Mutex tracing.
-//
-// The function pointer registered here will be called whenever a mutex is
-// contended.  The callback is given an opaque handle to the contended mutex,
-// an event name, and the number of wait cycles (as measured by
-// //absl/base/internal/cycleclock.h, and which may not be real
-// "cycle" counts.)
-//
-// The only event name currently sent is "slow release".
-//
-// This has the same memory ordering concerns as RegisterMutexProfiler() above.
-void RegisterMutexTracer(void (*fn)(const char *msg, const void *obj,
-                                    int64_t wait_cycles));
-
-// TODO(gfalcon): Combine RegisterMutexProfiler() and RegisterMutexTracer()
-// into a single interface, since they are only ever called in pairs.
-
-// Register a hook for CondVar tracing.
-//
-// The function pointer registered here will be called here on various CondVar
-// events.  The callback is given an opaque handle to the CondVar object and
-// a string identifying the event.  This is thread-safe, but only a single
-// tracer can be registered.
-//
-// Events that can be sent are "Wait", "Unwait", "Signal wakeup", and
-// "SignalAll wakeup".
-//
-// This has the same memory ordering concerns as RegisterMutexProfiler() above.
-void RegisterCondVarTracer(void (*fn)(const char *msg, const void *cv));
-
-// Register a hook for symbolizing stack traces in deadlock detector reports.
-//
-// 'pc' is the program counter being symbolized, 'out' is the buffer to write
-// into, and 'out_size' is the size of the buffer.  This function can return
-// false if symbolizing failed, or true if a NUL-terminated symbol was written
-// to 'out.'
-//
-// This has the same memory ordering concerns as RegisterMutexProfiler() above.
-//
-// DEPRECATED: The default symbolizer function is absl::Symbolize() and the
-// ability to register a different hook for symbolizing stack traces will be
-// removed on or after 2023-05-01.
-ABSL_DEPRECATED("absl::RegisterSymbolizer() is deprecated and will be removed "
-                "on or after 2023-05-01")
-void RegisterSymbolizer(bool (*fn)(const void *pc, char *out, int out_size));
-
-// EnableMutexInvariantDebugging()
-//
-// Enable or disable global support for Mutex invariant debugging.  If enabled,
-// then invariant predicates can be registered per-Mutex for debug checking.
-// See Mutex::EnableInvariantDebugging().
-void EnableMutexInvariantDebugging(bool enabled);
-
-// When in debug mode, and when the feature has been enabled globally, the
-// implementation will keep track of lock ordering and complain (or optionally
-// crash) if a cycle is detected in the acquired-before graph.
-
-// Possible modes of operation for the deadlock detector in debug mode.
-enum class OnDeadlockCycle {
-  kIgnore,  // Neither report on nor attempt to track cycles in lock ordering
-  kReport,  // Report lock cycles to stderr when detected
-  kAbort,  // Report lock cycles to stderr when detected, then abort
-};
-
-// SetMutexDeadlockDetectionMode()
-//
-// Enable or disable global support for detection of potential deadlocks
-// due to Mutex lock ordering inversions.  When set to 'kIgnore', tracking of
-// lock ordering is disabled.  Otherwise, in debug builds, a lock ordering graph
-// will be maintained internally, and detected cycles will be reported in
-// the manner chosen here.
-void SetMutexDeadlockDetectionMode(OnDeadlockCycle mode);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// In some build configurations we pass --detect-odr-violations to the
-// gold linker.  This causes it to flag weak symbol overrides as ODR
-// violations.  Because ODR only applies to C++ and not C,
-// --detect-odr-violations ignores symbols not mangled with C++ names.
-// By changing our extension points to be extern "C", we dodge this
-// check.
-extern "C" {
-void AbslInternalMutexYield();
-}  // extern "C"
-
-#endif  // ABSL_SYNCHRONIZATION_MUTEX_H_
diff --git a/third_party/abseil/absl/synchronization/mutex_benchmark.cc b/third_party/abseil/absl/synchronization/mutex_benchmark.cc
deleted file mode 100644
index 933ea14..0000000
--- a/third_party/abseil/absl/synchronization/mutex_benchmark.cc
+++ /dev/null
@@ -1,224 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdint>
-#include <mutex>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/cycleclock.h"
-#include "absl/base/internal/spinlock.h"
-#include "absl/synchronization/blocking_counter.h"
-#include "absl/synchronization/internal/thread_pool.h"
-#include "absl/synchronization/mutex.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-void BM_Mutex(benchmark::State& state) {
-  static absl::Mutex* mu = new absl::Mutex;
-  for (auto _ : state) {
-    absl::MutexLock lock(mu);
-  }
-}
-BENCHMARK(BM_Mutex)->UseRealTime()->Threads(1)->ThreadPerCpu();
-
-static void DelayNs(int64_t ns, int* data) {
-  int64_t end = absl::base_internal::CycleClock::Now() +
-                ns * absl::base_internal::CycleClock::Frequency() / 1e9;
-  while (absl::base_internal::CycleClock::Now() < end) {
-    ++(*data);
-    benchmark::DoNotOptimize(*data);
-  }
-}
-
-template <typename MutexType>
-class RaiiLocker {
- public:
-  explicit RaiiLocker(MutexType* mu) : mu_(mu) { mu_->Lock(); }
-  ~RaiiLocker() { mu_->Unlock(); }
- private:
-  MutexType* mu_;
-};
-
-template <>
-class RaiiLocker<std::mutex> {
- public:
-  explicit RaiiLocker(std::mutex* mu) : mu_(mu) { mu_->lock(); }
-  ~RaiiLocker() { mu_->unlock(); }
- private:
-  std::mutex* mu_;
-};
-
-template <typename MutexType>
-void BM_Contended(benchmark::State& state) {
-  struct Shared {
-    MutexType mu;
-    int data = 0;
-  };
-  static auto* shared = new Shared;
-  int local = 0;
-  for (auto _ : state) {
-    // Here we model both local work outside of the critical section as well as
-    // some work inside of the critical section. The idea is to capture some
-    // more or less realisitic contention levels.
-    // If contention is too low, the benchmark won't measure anything useful.
-    // If contention is unrealistically high, the benchmark will favor
-    // bad mutex implementations that block and otherwise distract threads
-    // from the mutex and shared state for as much as possible.
-    // To achieve this amount of local work is multiplied by number of threads
-    // to keep ratio between local work and critical section approximately
-    // equal regardless of number of threads.
-    DelayNs(100 * state.threads, &local);
-    RaiiLocker<MutexType> locker(&shared->mu);
-    DelayNs(state.range(0), &shared->data);
-  }
-}
-
-BENCHMARK_TEMPLATE(BM_Contended, absl::Mutex)
-    ->UseRealTime()
-    // ThreadPerCpu poorly handles non-power-of-two CPU counts.
-    ->Threads(1)
-    ->Threads(2)
-    ->Threads(4)
-    ->Threads(6)
-    ->Threads(8)
-    ->Threads(12)
-    ->Threads(16)
-    ->Threads(24)
-    ->Threads(32)
-    ->Threads(48)
-    ->Threads(64)
-    ->Threads(96)
-    ->Threads(128)
-    ->Threads(192)
-    ->Threads(256)
-    // Some empirically chosen amounts of work in critical section.
-    // 1 is low contention, 200 is high contention and few values in between.
-    ->Arg(1)
-    ->Arg(20)
-    ->Arg(50)
-    ->Arg(200);
-
-BENCHMARK_TEMPLATE(BM_Contended, absl::base_internal::SpinLock)
-    ->UseRealTime()
-    // ThreadPerCpu poorly handles non-power-of-two CPU counts.
-    ->Threads(1)
-    ->Threads(2)
-    ->Threads(4)
-    ->Threads(6)
-    ->Threads(8)
-    ->Threads(12)
-    ->Threads(16)
-    ->Threads(24)
-    ->Threads(32)
-    ->Threads(48)
-    ->Threads(64)
-    ->Threads(96)
-    ->Threads(128)
-    ->Threads(192)
-    ->Threads(256)
-    // Some empirically chosen amounts of work in critical section.
-    // 1 is low contention, 200 is high contention and few values in between.
-    ->Arg(1)
-    ->Arg(20)
-    ->Arg(50)
-    ->Arg(200);
-
-BENCHMARK_TEMPLATE(BM_Contended, std::mutex)
-    ->UseRealTime()
-    // ThreadPerCpu poorly handles non-power-of-two CPU counts.
-    ->Threads(1)
-    ->Threads(2)
-    ->Threads(4)
-    ->Threads(6)
-    ->Threads(8)
-    ->Threads(12)
-    ->Threads(16)
-    ->Threads(24)
-    ->Threads(32)
-    ->Threads(48)
-    ->Threads(64)
-    ->Threads(96)
-    ->Threads(128)
-    ->Threads(192)
-    ->Threads(256)
-    // Some empirically chosen amounts of work in critical section.
-    // 1 is low contention, 200 is high contention and few values in between.
-    ->Arg(1)
-    ->Arg(20)
-    ->Arg(50)
-    ->Arg(200);
-
-// Measure the overhead of conditions on mutex release (when they must be
-// evaluated).  Mutex has (some) support for equivalence classes allowing
-// Conditions with the same function/argument to potentially not be multiply
-// evaluated.
-//
-// num_classes==0 is used for the special case of every waiter being distinct.
-void BM_ConditionWaiters(benchmark::State& state) {
-  int num_classes = state.range(0);
-  int num_waiters = state.range(1);
-
-  struct Helper {
-    static void Waiter(absl::BlockingCounter* init, absl::Mutex* m, int* p) {
-      init->DecrementCount();
-      m->LockWhen(absl::Condition(
-          static_cast<bool (*)(int*)>([](int* v) { return *v == 0; }), p));
-      m->Unlock();
-    }
-  };
-
-  if (num_classes == 0) {
-    // No equivalence classes.
-    num_classes = num_waiters;
-  }
-
-  absl::BlockingCounter init(num_waiters);
-  absl::Mutex mu;
-  std::vector<int> equivalence_classes(num_classes, 1);
-
-  // Must be declared last to be destroyed first.
-  absl::synchronization_internal::ThreadPool pool(num_waiters);
-
-  for (int i = 0; i < num_waiters; i++) {
-    // Mutex considers Conditions with the same function and argument
-    // to be equivalent.
-    pool.Schedule([&, i] {
-      Helper::Waiter(&init, &mu, &equivalence_classes[i % num_classes]);
-    });
-  }
-  init.Wait();
-
-  for (auto _ : state) {
-    mu.Lock();
-    mu.Unlock();  // Each unlock requires Condition evaluation for our waiters.
-  }
-
-  mu.Lock();
-  for (int i = 0; i < num_classes; i++) {
-    equivalence_classes[i] = 0;
-  }
-  mu.Unlock();
-}
-
-// Some configurations have higher thread limits than others.
-#if defined(__linux__) && !defined(ABSL_HAVE_THREAD_SANITIZER)
-constexpr int kMaxConditionWaiters = 8192;
-#else
-constexpr int kMaxConditionWaiters = 1024;
-#endif
-BENCHMARK(BM_ConditionWaiters)->RangePair(0, 2, 1, kMaxConditionWaiters);
-
-}  // namespace
diff --git a/third_party/abseil/absl/synchronization/mutex_test.cc b/third_party/abseil/absl/synchronization/mutex_test.cc
deleted file mode 100644
index 058f757..0000000
--- a/third_party/abseil/absl/synchronization/mutex_test.cc
+++ /dev/null
@@ -1,1706 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/mutex.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <cstdlib>
-#include <functional>
-#include <memory>
-#include <random>
-#include <string>
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/base/internal/sysinfo.h"
-#include "absl/memory/memory.h"
-#include "absl/synchronization/internal/thread_pool.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-
-namespace {
-
-// TODO(dmauro): Replace with a commandline flag.
-static constexpr bool kExtendedTest = false;
-
-std::unique_ptr<absl::synchronization_internal::ThreadPool> CreatePool(
-    int threads) {
-  return absl::make_unique<absl::synchronization_internal::ThreadPool>(threads);
-}
-
-std::unique_ptr<absl::synchronization_internal::ThreadPool>
-CreateDefaultPool() {
-  return CreatePool(kExtendedTest ? 32 : 10);
-}
-
-// Hack to schedule a function to run on a thread pool thread after a
-// duration has elapsed.
-static void ScheduleAfter(absl::synchronization_internal::ThreadPool *tp,
-                          absl::Duration after,
-                          const std::function<void()> &func) {
-  tp->Schedule([func, after] {
-    absl::SleepFor(after);
-    func();
-  });
-}
-
-struct TestContext {
-  int iterations;
-  int threads;
-  int g0;  // global 0
-  int g1;  // global 1
-  absl::Mutex mu;
-  absl::CondVar cv;
-};
-
-// To test whether the invariant check call occurs
-static std::atomic<bool> invariant_checked;
-
-static bool GetInvariantChecked() {
-  return invariant_checked.load(std::memory_order_relaxed);
-}
-
-static void SetInvariantChecked(bool new_value) {
-  invariant_checked.store(new_value, std::memory_order_relaxed);
-}
-
-static void CheckSumG0G1(void *v) {
-  TestContext *cxt = static_cast<TestContext *>(v);
-  ABSL_RAW_CHECK(cxt->g0 == -cxt->g1, "Error in CheckSumG0G1");
-  SetInvariantChecked(true);
-}
-
-static void TestMu(TestContext *cxt, int c) {
-  for (int i = 0; i != cxt->iterations; i++) {
-    absl::MutexLock l(&cxt->mu);
-    int a = cxt->g0 + 1;
-    cxt->g0 = a;
-    cxt->g1--;
-  }
-}
-
-static void TestTry(TestContext *cxt, int c) {
-  for (int i = 0; i != cxt->iterations; i++) {
-    do {
-      std::this_thread::yield();
-    } while (!cxt->mu.TryLock());
-    int a = cxt->g0 + 1;
-    cxt->g0 = a;
-    cxt->g1--;
-    cxt->mu.Unlock();
-  }
-}
-
-static void TestR20ms(TestContext *cxt, int c) {
-  for (int i = 0; i != cxt->iterations; i++) {
-    absl::ReaderMutexLock l(&cxt->mu);
-    absl::SleepFor(absl::Milliseconds(20));
-    cxt->mu.AssertReaderHeld();
-  }
-}
-
-static void TestRW(TestContext *cxt, int c) {
-  if ((c & 1) == 0) {
-    for (int i = 0; i != cxt->iterations; i++) {
-      absl::WriterMutexLock l(&cxt->mu);
-      cxt->g0++;
-      cxt->g1--;
-      cxt->mu.AssertHeld();
-      cxt->mu.AssertReaderHeld();
-    }
-  } else {
-    for (int i = 0; i != cxt->iterations; i++) {
-      absl::ReaderMutexLock l(&cxt->mu);
-      ABSL_RAW_CHECK(cxt->g0 == -cxt->g1, "Error in TestRW");
-      cxt->mu.AssertReaderHeld();
-    }
-  }
-}
-
-struct MyContext {
-  int target;
-  TestContext *cxt;
-  bool MyTurn();
-};
-
-bool MyContext::MyTurn() {
-  TestContext *cxt = this->cxt;
-  return cxt->g0 == this->target || cxt->g0 == cxt->iterations;
-}
-
-static void TestAwait(TestContext *cxt, int c) {
-  MyContext mc;
-  mc.target = c;
-  mc.cxt = cxt;
-  absl::MutexLock l(&cxt->mu);
-  cxt->mu.AssertHeld();
-  while (cxt->g0 < cxt->iterations) {
-    cxt->mu.Await(absl::Condition(&mc, &MyContext::MyTurn));
-    ABSL_RAW_CHECK(mc.MyTurn(), "Error in TestAwait");
-    cxt->mu.AssertHeld();
-    if (cxt->g0 < cxt->iterations) {
-      int a = cxt->g0 + 1;
-      cxt->g0 = a;
-      mc.target += cxt->threads;
-    }
-  }
-}
-
-static void TestSignalAll(TestContext *cxt, int c) {
-  int target = c;
-  absl::MutexLock l(&cxt->mu);
-  cxt->mu.AssertHeld();
-  while (cxt->g0 < cxt->iterations) {
-    while (cxt->g0 != target && cxt->g0 != cxt->iterations) {
-      cxt->cv.Wait(&cxt->mu);
-    }
-    if (cxt->g0 < cxt->iterations) {
-      int a = cxt->g0 + 1;
-      cxt->g0 = a;
-      cxt->cv.SignalAll();
-      target += cxt->threads;
-    }
-  }
-}
-
-static void TestSignal(TestContext *cxt, int c) {
-  ABSL_RAW_CHECK(cxt->threads == 2, "TestSignal should use 2 threads");
-  int target = c;
-  absl::MutexLock l(&cxt->mu);
-  cxt->mu.AssertHeld();
-  while (cxt->g0 < cxt->iterations) {
-    while (cxt->g0 != target && cxt->g0 != cxt->iterations) {
-      cxt->cv.Wait(&cxt->mu);
-    }
-    if (cxt->g0 < cxt->iterations) {
-      int a = cxt->g0 + 1;
-      cxt->g0 = a;
-      cxt->cv.Signal();
-      target += cxt->threads;
-    }
-  }
-}
-
-static void TestCVTimeout(TestContext *cxt, int c) {
-  int target = c;
-  absl::MutexLock l(&cxt->mu);
-  cxt->mu.AssertHeld();
-  while (cxt->g0 < cxt->iterations) {
-    while (cxt->g0 != target && cxt->g0 != cxt->iterations) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(100));
-    }
-    if (cxt->g0 < cxt->iterations) {
-      int a = cxt->g0 + 1;
-      cxt->g0 = a;
-      cxt->cv.SignalAll();
-      target += cxt->threads;
-    }
-  }
-}
-
-static bool G0GE2(TestContext *cxt) { return cxt->g0 >= 2; }
-
-static void TestTime(TestContext *cxt, int c, bool use_cv) {
-  ABSL_RAW_CHECK(cxt->iterations == 1, "TestTime should only use 1 iteration");
-  ABSL_RAW_CHECK(cxt->threads > 2, "TestTime should use more than 2 threads");
-  const bool kFalse = false;
-  absl::Condition false_cond(&kFalse);
-  absl::Condition g0ge2(G0GE2, cxt);
-  if (c == 0) {
-    absl::MutexLock l(&cxt->mu);
-
-    absl::Time start = absl::Now();
-    if (use_cv) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(1));
-    } else {
-      ABSL_RAW_CHECK(!cxt->mu.AwaitWithTimeout(false_cond, absl::Seconds(1)),
-                     "TestTime failed");
-    }
-    absl::Duration elapsed = absl::Now() - start;
-    ABSL_RAW_CHECK(
-        absl::Seconds(0.9) <= elapsed && elapsed <= absl::Seconds(2.0),
-        "TestTime failed");
-    ABSL_RAW_CHECK(cxt->g0 == 1, "TestTime failed");
-
-    start = absl::Now();
-    if (use_cv) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(1));
-    } else {
-      ABSL_RAW_CHECK(!cxt->mu.AwaitWithTimeout(false_cond, absl::Seconds(1)),
-                     "TestTime failed");
-    }
-    elapsed = absl::Now() - start;
-    ABSL_RAW_CHECK(
-        absl::Seconds(0.9) <= elapsed && elapsed <= absl::Seconds(2.0),
-        "TestTime failed");
-    cxt->g0++;
-    if (use_cv) {
-      cxt->cv.Signal();
-    }
-
-    start = absl::Now();
-    if (use_cv) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(4));
-    } else {
-      ABSL_RAW_CHECK(!cxt->mu.AwaitWithTimeout(false_cond, absl::Seconds(4)),
-                     "TestTime failed");
-    }
-    elapsed = absl::Now() - start;
-    ABSL_RAW_CHECK(
-        absl::Seconds(3.9) <= elapsed && elapsed <= absl::Seconds(6.0),
-        "TestTime failed");
-    ABSL_RAW_CHECK(cxt->g0 >= 3, "TestTime failed");
-
-    start = absl::Now();
-    if (use_cv) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(1));
-    } else {
-      ABSL_RAW_CHECK(!cxt->mu.AwaitWithTimeout(false_cond, absl::Seconds(1)),
-                     "TestTime failed");
-    }
-    elapsed = absl::Now() - start;
-    ABSL_RAW_CHECK(
-        absl::Seconds(0.9) <= elapsed && elapsed <= absl::Seconds(2.0),
-        "TestTime failed");
-    if (use_cv) {
-      cxt->cv.SignalAll();
-    }
-
-    start = absl::Now();
-    if (use_cv) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(1));
-    } else {
-      ABSL_RAW_CHECK(!cxt->mu.AwaitWithTimeout(false_cond, absl::Seconds(1)),
-                     "TestTime failed");
-    }
-    elapsed = absl::Now() - start;
-    ABSL_RAW_CHECK(absl::Seconds(0.9) <= elapsed &&
-                   elapsed <= absl::Seconds(2.0), "TestTime failed");
-    ABSL_RAW_CHECK(cxt->g0 == cxt->threads, "TestTime failed");
-
-  } else if (c == 1) {
-    absl::MutexLock l(&cxt->mu);
-    const absl::Time start = absl::Now();
-    if (use_cv) {
-      cxt->cv.WaitWithTimeout(&cxt->mu, absl::Milliseconds(500));
-    } else {
-      ABSL_RAW_CHECK(
-          !cxt->mu.AwaitWithTimeout(false_cond, absl::Milliseconds(500)),
-          "TestTime failed");
-    }
-    const absl::Duration elapsed = absl::Now() - start;
-    ABSL_RAW_CHECK(
-        absl::Seconds(0.4) <= elapsed && elapsed <= absl::Seconds(0.9),
-        "TestTime failed");
-    cxt->g0++;
-  } else if (c == 2) {
-    absl::MutexLock l(&cxt->mu);
-    if (use_cv) {
-      while (cxt->g0 < 2) {
-        cxt->cv.WaitWithTimeout(&cxt->mu, absl::Seconds(100));
-      }
-    } else {
-      ABSL_RAW_CHECK(cxt->mu.AwaitWithTimeout(g0ge2, absl::Seconds(100)),
-                     "TestTime failed");
-    }
-    cxt->g0++;
-  } else {
-    absl::MutexLock l(&cxt->mu);
-    if (use_cv) {
-      while (cxt->g0 < 2) {
-        cxt->cv.Wait(&cxt->mu);
-      }
-    } else {
-      cxt->mu.Await(g0ge2);
-    }
-    cxt->g0++;
-  }
-}
-
-static void TestMuTime(TestContext *cxt, int c) { TestTime(cxt, c, false); }
-
-static void TestCVTime(TestContext *cxt, int c) { TestTime(cxt, c, true); }
-
-static void EndTest(int *c0, int *c1, absl::Mutex *mu, absl::CondVar *cv,
-                    const std::function<void(int)>& cb) {
-  mu->Lock();
-  int c = (*c0)++;
-  mu->Unlock();
-  cb(c);
-  absl::MutexLock l(mu);
-  (*c1)++;
-  cv->Signal();
-}
-
-// Code common to RunTest() and RunTestWithInvariantDebugging().
-static int RunTestCommon(TestContext *cxt, void (*test)(TestContext *cxt, int),
-                         int threads, int iterations, int operations) {
-  absl::Mutex mu2;
-  absl::CondVar cv2;
-  int c0 = 0;
-  int c1 = 0;
-  cxt->g0 = 0;
-  cxt->g1 = 0;
-  cxt->iterations = iterations;
-  cxt->threads = threads;
-  absl::synchronization_internal::ThreadPool tp(threads);
-  for (int i = 0; i != threads; i++) {
-    tp.Schedule(std::bind(&EndTest, &c0, &c1, &mu2, &cv2,
-                          std::function<void(int)>(
-                              std::bind(test, cxt, std::placeholders::_1))));
-  }
-  mu2.Lock();
-  while (c1 != threads) {
-    cv2.Wait(&mu2);
-  }
-  mu2.Unlock();
-  return cxt->g0;
-}
-
-// Basis for the parameterized tests configured below.
-static int RunTest(void (*test)(TestContext *cxt, int), int threads,
-                   int iterations, int operations) {
-  TestContext cxt;
-  return RunTestCommon(&cxt, test, threads, iterations, operations);
-}
-
-// Like RunTest(), but sets an invariant on the tested Mutex and
-// verifies that the invariant check happened. The invariant function
-// will be passed the TestContext* as its arg and must call
-// SetInvariantChecked(true);
-#if !defined(ABSL_MUTEX_ENABLE_INVARIANT_DEBUGGING_NOT_IMPLEMENTED)
-static int RunTestWithInvariantDebugging(void (*test)(TestContext *cxt, int),
-                                         int threads, int iterations,
-                                         int operations,
-                                         void (*invariant)(void *)) {
-  absl::EnableMutexInvariantDebugging(true);
-  SetInvariantChecked(false);
-  TestContext cxt;
-  cxt.mu.EnableInvariantDebugging(invariant, &cxt);
-  int ret = RunTestCommon(&cxt, test, threads, iterations, operations);
-  ABSL_RAW_CHECK(GetInvariantChecked(), "Invariant not checked");
-  absl::EnableMutexInvariantDebugging(false);  // Restore.
-  return ret;
-}
-#endif
-
-// --------------------------------------------------------
-// Test for fix of bug in TryRemove()
-struct TimeoutBugStruct {
-  absl::Mutex mu;
-  bool a;
-  int a_waiter_count;
-};
-
-static void WaitForA(TimeoutBugStruct *x) {
-  x->mu.LockWhen(absl::Condition(&x->a));
-  x->a_waiter_count--;
-  x->mu.Unlock();
-}
-
-static bool NoAWaiters(TimeoutBugStruct *x) { return x->a_waiter_count == 0; }
-
-// Test that a CondVar.Wait(&mutex) can un-block a call to mutex.Await() in
-// another thread.
-TEST(Mutex, CondVarWaitSignalsAwait) {
-  // Use a struct so the lock annotations apply.
-  struct {
-    absl::Mutex barrier_mu;
-    bool barrier ABSL_GUARDED_BY(barrier_mu) = false;
-
-    absl::Mutex release_mu;
-    bool release ABSL_GUARDED_BY(release_mu) = false;
-    absl::CondVar released_cv;
-  } state;
-
-  auto pool = CreateDefaultPool();
-
-  // Thread A.  Sets barrier, waits for release using Mutex::Await, then
-  // signals released_cv.
-  pool->Schedule([&state] {
-    state.release_mu.Lock();
-
-    state.barrier_mu.Lock();
-    state.barrier = true;
-    state.barrier_mu.Unlock();
-
-    state.release_mu.Await(absl::Condition(&state.release));
-    state.released_cv.Signal();
-    state.release_mu.Unlock();
-  });
-
-  state.barrier_mu.LockWhen(absl::Condition(&state.barrier));
-  state.barrier_mu.Unlock();
-  state.release_mu.Lock();
-  // Thread A is now blocked on release by way of Mutex::Await().
-
-  // Set release.  Calling released_cv.Wait() should un-block thread A,
-  // which will signal released_cv.  If not, the test will hang.
-  state.release = true;
-  state.released_cv.Wait(&state.release_mu);
-  state.release_mu.Unlock();
-}
-
-// Test that a CondVar.WaitWithTimeout(&mutex) can un-block a call to
-// mutex.Await() in another thread.
-TEST(Mutex, CondVarWaitWithTimeoutSignalsAwait) {
-  // Use a struct so the lock annotations apply.
-  struct {
-    absl::Mutex barrier_mu;
-    bool barrier ABSL_GUARDED_BY(barrier_mu) = false;
-
-    absl::Mutex release_mu;
-    bool release ABSL_GUARDED_BY(release_mu) = false;
-    absl::CondVar released_cv;
-  } state;
-
-  auto pool = CreateDefaultPool();
-
-  // Thread A.  Sets barrier, waits for release using Mutex::Await, then
-  // signals released_cv.
-  pool->Schedule([&state] {
-    state.release_mu.Lock();
-
-    state.barrier_mu.Lock();
-    state.barrier = true;
-    state.barrier_mu.Unlock();
-
-    state.release_mu.Await(absl::Condition(&state.release));
-    state.released_cv.Signal();
-    state.release_mu.Unlock();
-  });
-
-  state.barrier_mu.LockWhen(absl::Condition(&state.barrier));
-  state.barrier_mu.Unlock();
-  state.release_mu.Lock();
-  // Thread A is now blocked on release by way of Mutex::Await().
-
-  // Set release.  Calling released_cv.Wait() should un-block thread A,
-  // which will signal released_cv.  If not, the test will hang.
-  state.release = true;
-  EXPECT_TRUE(
-      !state.released_cv.WaitWithTimeout(&state.release_mu, absl::Seconds(10)))
-      << "; Unrecoverable test failure: CondVar::WaitWithTimeout did not "
-         "unblock the absl::Mutex::Await call in another thread.";
-
-  state.release_mu.Unlock();
-}
-
-// Test for regression of a bug in loop of TryRemove()
-TEST(Mutex, MutexTimeoutBug) {
-  auto tp = CreateDefaultPool();
-
-  TimeoutBugStruct x;
-  x.a = false;
-  x.a_waiter_count = 2;
-  tp->Schedule(std::bind(&WaitForA, &x));
-  tp->Schedule(std::bind(&WaitForA, &x));
-  absl::SleepFor(absl::Seconds(1));  // Allow first two threads to hang.
-  // The skip field of the second will point to the first because there are
-  // only two.
-
-  // Now cause a thread waiting on an always-false to time out
-  // This would deadlock when the bug was present.
-  bool always_false = false;
-  x.mu.LockWhenWithTimeout(absl::Condition(&always_false),
-                           absl::Milliseconds(500));
-
-  // if we get here, the bug is not present.   Cleanup the state.
-
-  x.a = true;                                    // wakeup the two waiters on A
-  x.mu.Await(absl::Condition(&NoAWaiters, &x));  // wait for them to exit
-  x.mu.Unlock();
-}
-
-struct CondVarWaitDeadlock : testing::TestWithParam<int> {
-  absl::Mutex mu;
-  absl::CondVar cv;
-  bool cond1 = false;
-  bool cond2 = false;
-  bool read_lock1;
-  bool read_lock2;
-  bool signal_unlocked;
-
-  CondVarWaitDeadlock() {
-    read_lock1 = GetParam() & (1 << 0);
-    read_lock2 = GetParam() & (1 << 1);
-    signal_unlocked = GetParam() & (1 << 2);
-  }
-
-  void Waiter1() {
-    if (read_lock1) {
-      mu.ReaderLock();
-      while (!cond1) {
-        cv.Wait(&mu);
-      }
-      mu.ReaderUnlock();
-    } else {
-      mu.Lock();
-      while (!cond1) {
-        cv.Wait(&mu);
-      }
-      mu.Unlock();
-    }
-  }
-
-  void Waiter2() {
-    if (read_lock2) {
-      mu.ReaderLockWhen(absl::Condition(&cond2));
-      mu.ReaderUnlock();
-    } else {
-      mu.LockWhen(absl::Condition(&cond2));
-      mu.Unlock();
-    }
-  }
-};
-
-// Test for a deadlock bug in Mutex::Fer().
-// The sequence of events that lead to the deadlock is:
-// 1. waiter1 blocks on cv in read mode (mu bits = 0).
-// 2. waiter2 blocks on mu in either mode (mu bits = kMuWait).
-// 3. main thread locks mu, sets cond1, unlocks mu (mu bits = kMuWait).
-// 4. main thread signals on cv and this eventually calls Mutex::Fer().
-// Currently Fer wakes waiter1 since mu bits = kMuWait (mutex is unlocked).
-// Before the bug fix Fer neither woke waiter1 nor queued it on mutex,
-// which resulted in deadlock.
-TEST_P(CondVarWaitDeadlock, Test) {
-  auto waiter1 = CreatePool(1);
-  auto waiter2 = CreatePool(1);
-  waiter1->Schedule([this] { this->Waiter1(); });
-  waiter2->Schedule([this] { this->Waiter2(); });
-
-  // Wait while threads block (best-effort is fine).
-  absl::SleepFor(absl::Milliseconds(100));
-
-  // Wake condwaiter.
-  mu.Lock();
-  cond1 = true;
-  if (signal_unlocked) {
-    mu.Unlock();
-    cv.Signal();
-  } else {
-    cv.Signal();
-    mu.Unlock();
-  }
-  waiter1.reset();  // "join" waiter1
-
-  // Wake waiter.
-  mu.Lock();
-  cond2 = true;
-  mu.Unlock();
-  waiter2.reset();  // "join" waiter2
-}
-
-INSTANTIATE_TEST_SUITE_P(CondVarWaitDeadlockTest, CondVarWaitDeadlock,
-                         ::testing::Range(0, 8),
-                         ::testing::PrintToStringParamName());
-
-// --------------------------------------------------------
-// Test for fix of bug in DequeueAllWakeable()
-// Bug was that if there was more than one waiting reader
-// and all should be woken, the most recently blocked one
-// would not be.
-
-struct DequeueAllWakeableBugStruct {
-  absl::Mutex mu;
-  absl::Mutex mu2;       // protects all fields below
-  int unfinished_count;  // count of unfinished readers; under mu2
-  bool done1;            // unfinished_count == 0; under mu2
-  int finished_count;    // count of finished readers, under mu2
-  bool done2;            // finished_count == 0; under mu2
-};
-
-// Test for regression of a bug in loop of DequeueAllWakeable()
-static void AcquireAsReader(DequeueAllWakeableBugStruct *x) {
-  x->mu.ReaderLock();
-  x->mu2.Lock();
-  x->unfinished_count--;
-  x->done1 = (x->unfinished_count == 0);
-  x->mu2.Unlock();
-  // make sure that both readers acquired mu before we release it.
-  absl::SleepFor(absl::Seconds(2));
-  x->mu.ReaderUnlock();
-
-  x->mu2.Lock();
-  x->finished_count--;
-  x->done2 = (x->finished_count == 0);
-  x->mu2.Unlock();
-}
-
-// Test for regression of a bug in loop of DequeueAllWakeable()
-TEST(Mutex, MutexReaderWakeupBug) {
-  auto tp = CreateDefaultPool();
-
-  DequeueAllWakeableBugStruct x;
-  x.unfinished_count = 2;
-  x.done1 = false;
-  x.finished_count = 2;
-  x.done2 = false;
-  x.mu.Lock();  // acquire mu exclusively
-  // queue two thread that will block on reader locks on x.mu
-  tp->Schedule(std::bind(&AcquireAsReader, &x));
-  tp->Schedule(std::bind(&AcquireAsReader, &x));
-  absl::SleepFor(absl::Seconds(1));  // give time for reader threads to block
-  x.mu.Unlock();                     // wake them up
-
-  // both readers should finish promptly
-  EXPECT_TRUE(
-      x.mu2.LockWhenWithTimeout(absl::Condition(&x.done1), absl::Seconds(10)));
-  x.mu2.Unlock();
-
-  EXPECT_TRUE(
-      x.mu2.LockWhenWithTimeout(absl::Condition(&x.done2), absl::Seconds(10)));
-  x.mu2.Unlock();
-}
-
-struct LockWhenTestStruct {
-  absl::Mutex mu1;
-  bool cond = false;
-
-  absl::Mutex mu2;
-  bool waiting = false;
-};
-
-static bool LockWhenTestIsCond(LockWhenTestStruct* s) {
-  s->mu2.Lock();
-  s->waiting = true;
-  s->mu2.Unlock();
-  return s->cond;
-}
-
-static void LockWhenTestWaitForIsCond(LockWhenTestStruct* s) {
-  s->mu1.LockWhen(absl::Condition(&LockWhenTestIsCond, s));
-  s->mu1.Unlock();
-}
-
-TEST(Mutex, LockWhen) {
-  LockWhenTestStruct s;
-
-  std::thread t(LockWhenTestWaitForIsCond, &s);
-  s.mu2.LockWhen(absl::Condition(&s.waiting));
-  s.mu2.Unlock();
-
-  s.mu1.Lock();
-  s.cond = true;
-  s.mu1.Unlock();
-
-  t.join();
-}
-
-TEST(Mutex, LockWhenGuard) {
-  absl::Mutex mu;
-  int n = 30;
-  bool done = false;
-
-  // We don't inline the lambda because the conversion is ambiguous in MSVC.
-  bool (*cond_eq_10)(int *) = [](int *p) { return *p == 10; };
-  bool (*cond_lt_10)(int *) = [](int *p) { return *p < 10; };
-
-  std::thread t1([&mu, &n, &done, cond_eq_10]() {
-    absl::ReaderMutexLock lock(&mu, absl::Condition(cond_eq_10, &n));
-    done = true;
-  });
-
-  std::thread t2[10];
-  for (std::thread &t : t2) {
-    t = std::thread([&mu, &n, cond_lt_10]() {
-      absl::WriterMutexLock lock(&mu, absl::Condition(cond_lt_10, &n));
-      ++n;
-    });
-  }
-
-  {
-    absl::MutexLock lock(&mu);
-    n = 0;
-  }
-
-  for (std::thread &t : t2) t.join();
-  t1.join();
-
-  EXPECT_TRUE(done);
-  EXPECT_EQ(n, 10);
-}
-
-// --------------------------------------------------------
-// The following test requires Mutex::ReaderLock to be a real shared
-// lock, which is not the case in all builds.
-#if !defined(ABSL_MUTEX_READER_LOCK_IS_EXCLUSIVE)
-
-// Test for fix of bug in UnlockSlow() that incorrectly decremented the reader
-// count when putting a thread to sleep waiting for a false condition when the
-// lock was not held.
-
-// For this bug to strike, we make a thread wait on a free mutex with no
-// waiters by causing its wakeup condition to be false.   Then the
-// next two acquirers must be readers.   The bug causes the lock
-// to be released when one reader unlocks, rather than both.
-
-struct ReaderDecrementBugStruct {
-  bool cond;  // to delay first thread (under mu)
-  int done;   // reference count (under mu)
-  absl::Mutex mu;
-
-  bool waiting_on_cond;   // under mu2
-  bool have_reader_lock;  // under mu2
-  bool complete;          // under mu2
-  absl::Mutex mu2;        // > mu
-};
-
-// L >= mu, L < mu_waiting_on_cond
-static bool IsCond(void *v) {
-  ReaderDecrementBugStruct *x = reinterpret_cast<ReaderDecrementBugStruct *>(v);
-  x->mu2.Lock();
-  x->waiting_on_cond = true;
-  x->mu2.Unlock();
-  return x->cond;
-}
-
-// L >= mu
-static bool AllDone(void *v) {
-  ReaderDecrementBugStruct *x = reinterpret_cast<ReaderDecrementBugStruct *>(v);
-  return x->done == 0;
-}
-
-// L={}
-static void WaitForCond(ReaderDecrementBugStruct *x) {
-  absl::Mutex dummy;
-  absl::MutexLock l(&dummy);
-  x->mu.LockWhen(absl::Condition(&IsCond, x));
-  x->done--;
-  x->mu.Unlock();
-}
-
-// L={}
-static void GetReadLock(ReaderDecrementBugStruct *x) {
-  x->mu.ReaderLock();
-  x->mu2.Lock();
-  x->have_reader_lock = true;
-  x->mu2.Await(absl::Condition(&x->complete));
-  x->mu2.Unlock();
-  x->mu.ReaderUnlock();
-  x->mu.Lock();
-  x->done--;
-  x->mu.Unlock();
-}
-
-// Test for reader counter being decremented incorrectly by waiter
-// with false condition.
-TEST(Mutex, MutexReaderDecrementBug) ABSL_NO_THREAD_SAFETY_ANALYSIS {
-  ReaderDecrementBugStruct x;
-  x.cond = false;
-  x.waiting_on_cond = false;
-  x.have_reader_lock = false;
-  x.complete = false;
-  x.done = 2;  // initial ref count
-
-  // Run WaitForCond() and wait for it to sleep
-  std::thread thread1(WaitForCond, &x);
-  x.mu2.LockWhen(absl::Condition(&x.waiting_on_cond));
-  x.mu2.Unlock();
-
-  // Run GetReadLock(), and wait for it to get the read lock
-  std::thread thread2(GetReadLock, &x);
-  x.mu2.LockWhen(absl::Condition(&x.have_reader_lock));
-  x.mu2.Unlock();
-
-  // Get the reader lock ourselves, and release it.
-  x.mu.ReaderLock();
-  x.mu.ReaderUnlock();
-
-  // The lock should be held in read mode by GetReadLock().
-  // If we have the bug, the lock will be free.
-  x.mu.AssertReaderHeld();
-
-  // Wake up all the threads.
-  x.mu2.Lock();
-  x.complete = true;
-  x.mu2.Unlock();
-
-  // TODO(delesley): turn on analysis once lock upgrading is supported.
-  // (This call upgrades the lock from shared to exclusive.)
-  x.mu.Lock();
-  x.cond = true;
-  x.mu.Await(absl::Condition(&AllDone, &x));
-  x.mu.Unlock();
-
-  thread1.join();
-  thread2.join();
-}
-#endif  // !ABSL_MUTEX_READER_LOCK_IS_EXCLUSIVE
-
-// Test that we correctly handle the situation when a lock is
-// held and then destroyed (w/o unlocking).
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-// TSAN reports errors when locked Mutexes are destroyed.
-TEST(Mutex, DISABLED_LockedMutexDestructionBug) NO_THREAD_SAFETY_ANALYSIS {
-#else
-TEST(Mutex, LockedMutexDestructionBug) ABSL_NO_THREAD_SAFETY_ANALYSIS {
-#endif
-  for (int i = 0; i != 10; i++) {
-    // Create, lock and destroy 10 locks.
-    const int kNumLocks = 10;
-    auto mu = absl::make_unique<absl::Mutex[]>(kNumLocks);
-    for (int j = 0; j != kNumLocks; j++) {
-      if ((j % 2) == 0) {
-        mu[j].WriterLock();
-      } else {
-        mu[j].ReaderLock();
-      }
-    }
-  }
-}
-
-// --------------------------------------------------------
-// Test for bug with pattern of readers using a condvar.  The bug was that if a
-// reader went to sleep on a condition variable while one or more other readers
-// held the lock, but there were no waiters, the reader count (held in the
-// mutex word) would be lost.  (This is because Enqueue() had at one time
-// always placed the thread on the Mutex queue.  Later (CL 4075610), to
-// tolerate re-entry into Mutex from a Condition predicate, Enqueue() was
-// changed so that it could also place a thread on a condition-variable.  This
-// introduced the case where Enqueue() returned with an empty queue, and this
-// case was handled incorrectly in one place.)
-
-static void ReaderForReaderOnCondVar(absl::Mutex *mu, absl::CondVar *cv,
-                                     int *running) {
-  std::random_device dev;
-  std::mt19937 gen(dev());
-  std::uniform_int_distribution<int> random_millis(0, 15);
-  mu->ReaderLock();
-  while (*running == 3) {
-    absl::SleepFor(absl::Milliseconds(random_millis(gen)));
-    cv->WaitWithTimeout(mu, absl::Milliseconds(random_millis(gen)));
-  }
-  mu->ReaderUnlock();
-  mu->Lock();
-  (*running)--;
-  mu->Unlock();
-}
-
-struct True {
-  template <class... Args>
-  bool operator()(Args...) const {
-    return true;
-  }
-};
-
-struct DerivedTrue : True {};
-
-TEST(Mutex, FunctorCondition) {
-  {  // Variadic
-    True f;
-    EXPECT_TRUE(absl::Condition(&f).Eval());
-  }
-
-  {  // Inherited
-    DerivedTrue g;
-    EXPECT_TRUE(absl::Condition(&g).Eval());
-  }
-
-  {  // lambda
-    int value = 3;
-    auto is_zero = [&value] { return value == 0; };
-    absl::Condition c(&is_zero);
-    EXPECT_FALSE(c.Eval());
-    value = 0;
-    EXPECT_TRUE(c.Eval());
-  }
-
-  {  // bind
-    int value = 0;
-    auto is_positive = std::bind(std::less<int>(), 0, std::cref(value));
-    absl::Condition c(&is_positive);
-    EXPECT_FALSE(c.Eval());
-    value = 1;
-    EXPECT_TRUE(c.Eval());
-  }
-
-  {  // std::function
-    int value = 3;
-    std::function<bool()> is_zero = [&value] { return value == 0; };
-    absl::Condition c(&is_zero);
-    EXPECT_FALSE(c.Eval());
-    value = 0;
-    EXPECT_TRUE(c.Eval());
-  }
-}
-
-static bool IntIsZero(int *x) { return *x == 0; }
-
-// Test for reader waiting condition variable when there are other readers
-// but no waiters.
-TEST(Mutex, TestReaderOnCondVar) {
-  auto tp = CreateDefaultPool();
-  absl::Mutex mu;
-  absl::CondVar cv;
-  int running = 3;
-  tp->Schedule(std::bind(&ReaderForReaderOnCondVar, &mu, &cv, &running));
-  tp->Schedule(std::bind(&ReaderForReaderOnCondVar, &mu, &cv, &running));
-  absl::SleepFor(absl::Seconds(2));
-  mu.Lock();
-  running--;
-  mu.Await(absl::Condition(&IntIsZero, &running));
-  mu.Unlock();
-}
-
-// --------------------------------------------------------
-struct AcquireFromConditionStruct {
-  absl::Mutex mu0;   // protects value, done
-  int value;         // times condition function is called; under mu0,
-  bool done;         // done with test?  under mu0
-  absl::Mutex mu1;   // used to attempt to mess up state of mu0
-  absl::CondVar cv;  // so the condition function can be invoked from
-                     // CondVar::Wait().
-};
-
-static bool ConditionWithAcquire(AcquireFromConditionStruct *x) {
-  x->value++;  // count times this function is called
-
-  if (x->value == 2 || x->value == 3) {
-    // On the second and third invocation of this function, sleep for 100ms,
-    // but with the side-effect of altering the state of a Mutex other than
-    // than one for which this is a condition.  The spec now explicitly allows
-    // this side effect; previously it did not.  it was illegal.
-    bool always_false = false;
-    x->mu1.LockWhenWithTimeout(absl::Condition(&always_false),
-                               absl::Milliseconds(100));
-    x->mu1.Unlock();
-  }
-  ABSL_RAW_CHECK(x->value < 4, "should not be invoked a fourth time");
-
-  // We arrange for the condition to return true on only the 2nd and 3rd calls.
-  return x->value == 2 || x->value == 3;
-}
-
-static void WaitForCond2(AcquireFromConditionStruct *x) {
-  // wait for cond0 to become true
-  x->mu0.LockWhen(absl::Condition(&ConditionWithAcquire, x));
-  x->done = true;
-  x->mu0.Unlock();
-}
-
-// Test for Condition whose function acquires other Mutexes
-TEST(Mutex, AcquireFromCondition) {
-  auto tp = CreateDefaultPool();
-
-  AcquireFromConditionStruct x;
-  x.value = 0;
-  x.done = false;
-  tp->Schedule(
-      std::bind(&WaitForCond2, &x));  // run WaitForCond2() in a thread T
-  // T will hang because the first invocation of ConditionWithAcquire() will
-  // return false.
-  absl::SleepFor(absl::Milliseconds(500));  // allow T time to hang
-
-  x.mu0.Lock();
-  x.cv.WaitWithTimeout(&x.mu0, absl::Milliseconds(500));  // wake T
-  // T will be woken because the Wait() will call ConditionWithAcquire()
-  // for the second time, and it will return true.
-
-  x.mu0.Unlock();
-
-  // T will then acquire the lock and recheck its own condition.
-  // It will find the condition true, as this is the third invocation,
-  // but the use of another Mutex by the calling function will
-  // cause the old mutex implementation to think that the outer
-  // LockWhen() has timed out because the inner LockWhenWithTimeout() did.
-  // T will then check the condition a fourth time because it finds a
-  // timeout occurred.  This should not happen in the new
-  // implementation that allows the Condition function to use Mutexes.
-
-  // It should also succeed, even though the Condition function
-  // is being invoked from CondVar::Wait, and thus this thread
-  // is conceptually waiting both on the condition variable, and on mu2.
-
-  x.mu0.LockWhen(absl::Condition(&x.done));
-  x.mu0.Unlock();
-}
-
-TEST(Mutex, DeadlockDetector) {
-  absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kAbort);
-
-  // check that we can call ForgetDeadlockInfo() on a lock with the lock held
-  absl::Mutex m1;
-  absl::Mutex m2;
-  absl::Mutex m3;
-  absl::Mutex m4;
-
-  m1.Lock();  // m1 gets ID1
-  m2.Lock();  // m2 gets ID2
-  m3.Lock();  // m3 gets ID3
-  m3.Unlock();
-  m2.Unlock();
-  // m1 still held
-  m1.ForgetDeadlockInfo();  // m1 loses ID
-  m2.Lock();                // m2 gets ID2
-  m3.Lock();                // m3 gets ID3
-  m4.Lock();                // m4 gets ID4
-  m3.Unlock();
-  m2.Unlock();
-  m4.Unlock();
-  m1.Unlock();
-}
-
-// Bazel has a test "warning" file that programs can write to if the
-// test should pass with a warning.  This class disables the warning
-// file until it goes out of scope.
-class ScopedDisableBazelTestWarnings {
- public:
-  ScopedDisableBazelTestWarnings() {
-#ifdef _WIN32
-    char file[MAX_PATH];
-    if (GetEnvironmentVariableA(kVarName, file, sizeof(file)) < sizeof(file)) {
-      warnings_output_file_ = file;
-      SetEnvironmentVariableA(kVarName, nullptr);
-    }
-#else
-    const char *file = getenv(kVarName);
-    if (file != nullptr) {
-      warnings_output_file_ = file;
-      unsetenv(kVarName);
-    }
-#endif
-  }
-
-  ~ScopedDisableBazelTestWarnings() {
-    if (!warnings_output_file_.empty()) {
-#ifdef _WIN32
-      SetEnvironmentVariableA(kVarName, warnings_output_file_.c_str());
-#else
-      setenv(kVarName, warnings_output_file_.c_str(), 0);
-#endif
-    }
-  }
-
- private:
-  static const char kVarName[];
-  std::string warnings_output_file_;
-};
-const char ScopedDisableBazelTestWarnings::kVarName[] =
-    "TEST_WARNINGS_OUTPUT_FILE";
-
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-// This test intentionally creates deadlocks to test the deadlock detector.
-TEST(Mutex, DISABLED_DeadlockDetectorBazelWarning) {
-#else
-TEST(Mutex, DeadlockDetectorBazelWarning) {
-#endif
-  absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kReport);
-
-  // Cause deadlock detection to detect something, if it's
-  // compiled in and enabled.  But turn off the bazel warning.
-  ScopedDisableBazelTestWarnings disable_bazel_test_warnings;
-
-  absl::Mutex mu0;
-  absl::Mutex mu1;
-  bool got_mu0 = mu0.TryLock();
-  mu1.Lock();  // acquire mu1 while holding mu0
-  if (got_mu0) {
-    mu0.Unlock();
-  }
-  if (mu0.TryLock()) {  // try lock shouldn't cause deadlock detector to fire
-    mu0.Unlock();
-  }
-  mu0.Lock();  // acquire mu0 while holding mu1; should get one deadlock
-               // report here
-  mu0.Unlock();
-  mu1.Unlock();
-
-  absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kAbort);
-}
-
-// This test is tagged with NO_THREAD_SAFETY_ANALYSIS because the
-// annotation-based static thread-safety analysis is not currently
-// predicate-aware and cannot tell if the two for-loops that acquire and
-// release the locks have the same predicates.
-TEST(Mutex, DeadlockDetectorStressTest) ABSL_NO_THREAD_SAFETY_ANALYSIS {
-  // Stress test: Here we create a large number of locks and use all of them.
-  // If a deadlock detector keeps a full graph of lock acquisition order,
-  // it will likely be too slow for this test to pass.
-  const int n_locks = 1 << 17;
-  auto array_of_locks = absl::make_unique<absl::Mutex[]>(n_locks);
-  for (int i = 0; i < n_locks; i++) {
-    int end = std::min(n_locks, i + 5);
-    // acquire and then release locks i, i+1, ..., i+4
-    for (int j = i; j < end; j++) {
-      array_of_locks[j].Lock();
-    }
-    for (int j = i; j < end; j++) {
-      array_of_locks[j].Unlock();
-    }
-  }
-}
-
-#ifdef ABSL_HAVE_THREAD_SANITIZER
-// TSAN reports errors when locked Mutexes are destroyed.
-TEST(Mutex, DISABLED_DeadlockIdBug) NO_THREAD_SAFETY_ANALYSIS {
-#else
-TEST(Mutex, DeadlockIdBug) ABSL_NO_THREAD_SAFETY_ANALYSIS {
-#endif
-  // Test a scenario where a cached deadlock graph node id in the
-  // list of held locks is not invalidated when the corresponding
-  // mutex is deleted.
-  absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kAbort);
-  // Mutex that will be destroyed while being held
-  absl::Mutex *a = new absl::Mutex;
-  // Other mutexes needed by test
-  absl::Mutex b, c;
-
-  // Hold mutex.
-  a->Lock();
-
-  // Force deadlock id assignment by acquiring another lock.
-  b.Lock();
-  b.Unlock();
-
-  // Delete the mutex. The Mutex destructor tries to remove held locks,
-  // but the attempt isn't foolproof.  It can fail if:
-  //   (a) Deadlock detection is currently disabled.
-  //   (b) The destruction is from another thread.
-  // We exploit (a) by temporarily disabling deadlock detection.
-  absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kIgnore);
-  delete a;
-  absl::SetMutexDeadlockDetectionMode(absl::OnDeadlockCycle::kAbort);
-
-  // Now acquire another lock which will force a deadlock id assignment.
-  // We should end up getting assigned the same deadlock id that was
-  // freed up when "a" was deleted, which will cause a spurious deadlock
-  // report if the held lock entry for "a" was not invalidated.
-  c.Lock();
-  c.Unlock();
-}
-
-// --------------------------------------------------------
-// Test for timeouts/deadlines on condition waits that are specified using
-// absl::Duration and absl::Time.  For each waiting function we test with
-// a timeout/deadline that has already expired/passed, one that is infinite
-// and so never expires/passes, and one that will expire/pass in the near
-// future.
-
-static absl::Duration TimeoutTestAllowedSchedulingDelay() {
-  // Note: we use a function here because Microsoft Visual Studio fails to
-  // properly initialize constexpr static absl::Duration variables.
-  return absl::Milliseconds(150);
-}
-
-// Returns true if `actual_delay` is close enough to `expected_delay` to pass
-// the timeouts/deadlines test.  Otherwise, logs warnings and returns false.
-ABSL_MUST_USE_RESULT
-static bool DelayIsWithinBounds(absl::Duration expected_delay,
-                                absl::Duration actual_delay) {
-  bool pass = true;
-  // Do not allow the observed delay to be less than expected.  This may occur
-  // in practice due to clock skew or when the synchronization primitives use a
-  // different clock than absl::Now(), but these cases should be handled by the
-  // the retry mechanism in each TimeoutTest.
-  if (actual_delay < expected_delay) {
-    ABSL_RAW_LOG(WARNING,
-                 "Actual delay %s was too short, expected %s (difference %s)",
-                 absl::FormatDuration(actual_delay).c_str(),
-                 absl::FormatDuration(expected_delay).c_str(),
-                 absl::FormatDuration(actual_delay - expected_delay).c_str());
-    pass = false;
-  }
-  // If the expected delay is <= zero then allow a small error tolerance, since
-  // we do not expect context switches to occur during test execution.
-  // Otherwise, thread scheduling delays may be substantial in rare cases, so
-  // tolerate up to kTimeoutTestAllowedSchedulingDelay of error.
-  absl::Duration tolerance = expected_delay <= absl::ZeroDuration()
-                                 ? absl::Milliseconds(10)
-                                 : TimeoutTestAllowedSchedulingDelay();
-  if (actual_delay > expected_delay + tolerance) {
-    ABSL_RAW_LOG(WARNING,
-                 "Actual delay %s was too long, expected %s (difference %s)",
-                 absl::FormatDuration(actual_delay).c_str(),
-                 absl::FormatDuration(expected_delay).c_str(),
-                 absl::FormatDuration(actual_delay - expected_delay).c_str());
-    pass = false;
-  }
-  return pass;
-}
-
-// Parameters for TimeoutTest, below.
-struct TimeoutTestParam {
-  // The file and line number (used for logging purposes only).
-  const char *from_file;
-  int from_line;
-
-  // Should the absolute deadline API based on absl::Time be tested?  If false,
-  // the relative deadline API based on absl::Duration is tested.
-  bool use_absolute_deadline;
-
-  // The deadline/timeout used when calling the API being tested
-  // (e.g. Mutex::LockWhenWithDeadline).
-  absl::Duration wait_timeout;
-
-  // The delay before the condition will be set true by the test code.  If zero
-  // or negative, the condition is set true immediately (before calling the API
-  // being tested).  Otherwise, if infinite, the condition is never set true.
-  // Otherwise a closure is scheduled for the future that sets the condition
-  // true.
-  absl::Duration satisfy_condition_delay;
-
-  // The expected result of the condition after the call to the API being
-  // tested. Generally `true` means the condition was true when the API returns,
-  // `false` indicates an expected timeout.
-  bool expected_result;
-
-  // The expected delay before the API under test returns.  This is inherently
-  // flaky, so some slop is allowed (see `DelayIsWithinBounds` above), and the
-  // test keeps trying indefinitely until this constraint passes.
-  absl::Duration expected_delay;
-};
-
-// Print a `TimeoutTestParam` to a debug log.
-std::ostream &operator<<(std::ostream &os, const TimeoutTestParam &param) {
-  return os << "from: " << param.from_file << ":" << param.from_line
-            << " use_absolute_deadline: "
-            << (param.use_absolute_deadline ? "true" : "false")
-            << " wait_timeout: " << param.wait_timeout
-            << " satisfy_condition_delay: " << param.satisfy_condition_delay
-            << " expected_result: "
-            << (param.expected_result ? "true" : "false")
-            << " expected_delay: " << param.expected_delay;
-}
-
-std::string FormatString(const TimeoutTestParam &param) {
-  std::ostringstream os;
-  os << param;
-  return os.str();
-}
-
-// Like `thread::Executor::ScheduleAt` except:
-// a) Delays zero or negative are executed immediately in the current thread.
-// b) Infinite delays are never scheduled.
-// c) Calls this test's `ScheduleAt` helper instead of using `pool` directly.
-static void RunAfterDelay(absl::Duration delay,
-                          absl::synchronization_internal::ThreadPool *pool,
-                          const std::function<void()> &callback) {
-  if (delay <= absl::ZeroDuration()) {
-    callback();  // immediate
-  } else if (delay != absl::InfiniteDuration()) {
-    ScheduleAfter(pool, delay, callback);
-  }
-}
-
-class TimeoutTest : public ::testing::Test,
-                    public ::testing::WithParamInterface<TimeoutTestParam> {};
-
-std::vector<TimeoutTestParam> MakeTimeoutTestParamValues() {
-  // The `finite` delay is a finite, relatively short, delay.  We make it larger
-  // than our allowed scheduling delay (slop factor) to avoid confusion when
-  // diagnosing test failures.  The other constants here have clear meanings.
-  const absl::Duration finite = 3 * TimeoutTestAllowedSchedulingDelay();
-  const absl::Duration never = absl::InfiniteDuration();
-  const absl::Duration negative = -absl::InfiniteDuration();
-  const absl::Duration immediate = absl::ZeroDuration();
-
-  // Every test case is run twice; once using the absolute deadline API and once
-  // using the relative timeout API.
-  std::vector<TimeoutTestParam> values;
-  for (bool use_absolute_deadline : {false, true}) {
-    // Tests with a negative timeout (deadline in the past), which should
-    // immediately return current state of the condition.
-
-    // The condition is already true:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        negative,   // wait_timeout
-        immediate,  // satisfy_condition_delay
-        true,       // expected_result
-        immediate,  // expected_delay
-    });
-
-    // The condition becomes true, but the timeout has already expired:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        negative,  // wait_timeout
-        finite,    // satisfy_condition_delay
-        false,     // expected_result
-        immediate  // expected_delay
-    });
-
-    // The condition never becomes true:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        negative,  // wait_timeout
-        never,     // satisfy_condition_delay
-        false,     // expected_result
-        immediate  // expected_delay
-    });
-
-    // Tests with an infinite timeout (deadline in the infinite future), which
-    // should only return when the condition becomes true.
-
-    // The condition is already true:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        never,      // wait_timeout
-        immediate,  // satisfy_condition_delay
-        true,       // expected_result
-        immediate   // expected_delay
-    });
-
-    // The condition becomes true before the (infinite) expiry:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        never,   // wait_timeout
-        finite,  // satisfy_condition_delay
-        true,    // expected_result
-        finite,  // expected_delay
-    });
-
-    // Tests with a (small) finite timeout (deadline soon), with the condition
-    // becoming true both before and after its expiry.
-
-    // The condition is already true:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        never,      // wait_timeout
-        immediate,  // satisfy_condition_delay
-        true,       // expected_result
-        immediate   // expected_delay
-    });
-
-    // The condition becomes true before the expiry:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        finite * 2,  // wait_timeout
-        finite,      // satisfy_condition_delay
-        true,        // expected_result
-        finite       // expected_delay
-    });
-
-    // The condition becomes true, but the timeout has already expired:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        finite,      // wait_timeout
-        finite * 2,  // satisfy_condition_delay
-        false,       // expected_result
-        finite       // expected_delay
-    });
-
-    // The condition never becomes true:
-    values.push_back(TimeoutTestParam{
-        __FILE__, __LINE__, use_absolute_deadline,
-        finite,  // wait_timeout
-        never,   // satisfy_condition_delay
-        false,   // expected_result
-        finite   // expected_delay
-    });
-  }
-  return values;
-}
-
-// Instantiate `TimeoutTest` with `MakeTimeoutTestParamValues()`.
-INSTANTIATE_TEST_SUITE_P(All, TimeoutTest,
-                         testing::ValuesIn(MakeTimeoutTestParamValues()));
-
-TEST_P(TimeoutTest, Await) {
-  const TimeoutTestParam params = GetParam();
-  ABSL_RAW_LOG(INFO, "Params: %s", FormatString(params).c_str());
-
-  // Because this test asserts bounds on scheduling delays it is flaky.  To
-  // compensate it loops forever until it passes.  Failures express as test
-  // timeouts, in which case the test log can be used to diagnose the issue.
-  for (int attempt = 1;; ++attempt) {
-    ABSL_RAW_LOG(INFO, "Attempt %d", attempt);
-
-    absl::Mutex mu;
-    bool value = false;  // condition value (under mu)
-
-    std::unique_ptr<absl::synchronization_internal::ThreadPool> pool =
-        CreateDefaultPool();
-    RunAfterDelay(params.satisfy_condition_delay, pool.get(), [&] {
-      absl::MutexLock l(&mu);
-      value = true;
-    });
-
-    absl::MutexLock lock(&mu);
-    absl::Time start_time = absl::Now();
-    absl::Condition cond(&value);
-    bool result =
-        params.use_absolute_deadline
-            ? mu.AwaitWithDeadline(cond, start_time + params.wait_timeout)
-            : mu.AwaitWithTimeout(cond, params.wait_timeout);
-    if (DelayIsWithinBounds(params.expected_delay, absl::Now() - start_time)) {
-      EXPECT_EQ(params.expected_result, result);
-      break;
-    }
-  }
-}
-
-TEST_P(TimeoutTest, LockWhen) {
-  const TimeoutTestParam params = GetParam();
-  ABSL_RAW_LOG(INFO, "Params: %s", FormatString(params).c_str());
-
-  // Because this test asserts bounds on scheduling delays it is flaky.  To
-  // compensate it loops forever until it passes.  Failures express as test
-  // timeouts, in which case the test log can be used to diagnose the issue.
-  for (int attempt = 1;; ++attempt) {
-    ABSL_RAW_LOG(INFO, "Attempt %d", attempt);
-
-    absl::Mutex mu;
-    bool value = false;  // condition value (under mu)
-
-    std::unique_ptr<absl::synchronization_internal::ThreadPool> pool =
-        CreateDefaultPool();
-    RunAfterDelay(params.satisfy_condition_delay, pool.get(), [&] {
-      absl::MutexLock l(&mu);
-      value = true;
-    });
-
-    absl::Time start_time = absl::Now();
-    absl::Condition cond(&value);
-    bool result =
-        params.use_absolute_deadline
-            ? mu.LockWhenWithDeadline(cond, start_time + params.wait_timeout)
-            : mu.LockWhenWithTimeout(cond, params.wait_timeout);
-    mu.Unlock();
-
-    if (DelayIsWithinBounds(params.expected_delay, absl::Now() - start_time)) {
-      EXPECT_EQ(params.expected_result, result);
-      break;
-    }
-  }
-}
-
-TEST_P(TimeoutTest, ReaderLockWhen) {
-  const TimeoutTestParam params = GetParam();
-  ABSL_RAW_LOG(INFO, "Params: %s", FormatString(params).c_str());
-
-  // Because this test asserts bounds on scheduling delays it is flaky.  To
-  // compensate it loops forever until it passes.  Failures express as test
-  // timeouts, in which case the test log can be used to diagnose the issue.
-  for (int attempt = 0;; ++attempt) {
-    ABSL_RAW_LOG(INFO, "Attempt %d", attempt);
-
-    absl::Mutex mu;
-    bool value = false;  // condition value (under mu)
-
-    std::unique_ptr<absl::synchronization_internal::ThreadPool> pool =
-        CreateDefaultPool();
-    RunAfterDelay(params.satisfy_condition_delay, pool.get(), [&] {
-      absl::MutexLock l(&mu);
-      value = true;
-    });
-
-    absl::Time start_time = absl::Now();
-    bool result =
-        params.use_absolute_deadline
-            ? mu.ReaderLockWhenWithDeadline(absl::Condition(&value),
-                                            start_time + params.wait_timeout)
-            : mu.ReaderLockWhenWithTimeout(absl::Condition(&value),
-                                           params.wait_timeout);
-    mu.ReaderUnlock();
-
-    if (DelayIsWithinBounds(params.expected_delay, absl::Now() - start_time)) {
-      EXPECT_EQ(params.expected_result, result);
-      break;
-    }
-  }
-}
-
-TEST_P(TimeoutTest, Wait) {
-  const TimeoutTestParam params = GetParam();
-  ABSL_RAW_LOG(INFO, "Params: %s", FormatString(params).c_str());
-
-  // Because this test asserts bounds on scheduling delays it is flaky.  To
-  // compensate it loops forever until it passes.  Failures express as test
-  // timeouts, in which case the test log can be used to diagnose the issue.
-  for (int attempt = 0;; ++attempt) {
-    ABSL_RAW_LOG(INFO, "Attempt %d", attempt);
-
-    absl::Mutex mu;
-    bool value = false;  // condition value (under mu)
-    absl::CondVar cv;    // signals a change of `value`
-
-    std::unique_ptr<absl::synchronization_internal::ThreadPool> pool =
-        CreateDefaultPool();
-    RunAfterDelay(params.satisfy_condition_delay, pool.get(), [&] {
-      absl::MutexLock l(&mu);
-      value = true;
-      cv.Signal();
-    });
-
-    absl::MutexLock lock(&mu);
-    absl::Time start_time = absl::Now();
-    absl::Duration timeout = params.wait_timeout;
-    absl::Time deadline = start_time + timeout;
-    while (!value) {
-      if (params.use_absolute_deadline ? cv.WaitWithDeadline(&mu, deadline)
-                                       : cv.WaitWithTimeout(&mu, timeout)) {
-        break;  // deadline/timeout exceeded
-      }
-      timeout = deadline - absl::Now();  // recompute
-    }
-    bool result = value;  // note: `mu` is still held
-
-    if (DelayIsWithinBounds(params.expected_delay, absl::Now() - start_time)) {
-      EXPECT_EQ(params.expected_result, result);
-      break;
-    }
-  }
-}
-
-TEST(Mutex, Logging) {
-  // Allow user to look at logging output
-  absl::Mutex logged_mutex;
-  logged_mutex.EnableDebugLog("fido_mutex");
-  absl::CondVar logged_cv;
-  logged_cv.EnableDebugLog("rover_cv");
-  logged_mutex.Lock();
-  logged_cv.WaitWithTimeout(&logged_mutex, absl::Milliseconds(20));
-  logged_mutex.Unlock();
-  logged_mutex.ReaderLock();
-  logged_mutex.ReaderUnlock();
-  logged_mutex.Lock();
-  logged_mutex.Unlock();
-  logged_cv.Signal();
-  logged_cv.SignalAll();
-}
-
-// --------------------------------------------------------
-
-// Generate the vector of thread counts for tests parameterized on thread count.
-static std::vector<int> AllThreadCountValues() {
-  if (kExtendedTest) {
-    return {2, 4, 8, 10, 16, 20, 24, 30, 32};
-  }
-  return {2, 4, 10};
-}
-
-// A test fixture parameterized by thread count.
-class MutexVariableThreadCountTest : public ::testing::TestWithParam<int> {};
-
-// Instantiate the above with AllThreadCountOptions().
-INSTANTIATE_TEST_SUITE_P(ThreadCounts, MutexVariableThreadCountTest,
-                         ::testing::ValuesIn(AllThreadCountValues()),
-                         ::testing::PrintToStringParamName());
-
-// Reduces iterations by some factor for slow platforms
-// (determined empirically).
-static int ScaleIterations(int x) {
-  // ABSL_MUTEX_READER_LOCK_IS_EXCLUSIVE is set in the implementation
-  // of Mutex that uses either std::mutex or pthread_mutex_t. Use
-  // these as keys to determine the slow implementation.
-#if defined(ABSL_MUTEX_READER_LOCK_IS_EXCLUSIVE)
-  return x / 10;
-#else
-  return x;
-#endif
-}
-
-TEST_P(MutexVariableThreadCountTest, Mutex) {
-  int threads = GetParam();
-  int iterations = ScaleIterations(10000000) / threads;
-  int operations = threads * iterations;
-  EXPECT_EQ(RunTest(&TestMu, threads, iterations, operations), operations);
-#if !defined(ABSL_MUTEX_ENABLE_INVARIANT_DEBUGGING_NOT_IMPLEMENTED)
-  iterations = std::min(iterations, 10);
-  operations = threads * iterations;
-  EXPECT_EQ(RunTestWithInvariantDebugging(&TestMu, threads, iterations,
-                                          operations, CheckSumG0G1),
-            operations);
-#endif
-}
-
-TEST_P(MutexVariableThreadCountTest, Try) {
-  int threads = GetParam();
-  int iterations = 1000000 / threads;
-  int operations = iterations * threads;
-  EXPECT_EQ(RunTest(&TestTry, threads, iterations, operations), operations);
-#if !defined(ABSL_MUTEX_ENABLE_INVARIANT_DEBUGGING_NOT_IMPLEMENTED)
-  iterations = std::min(iterations, 10);
-  operations = threads * iterations;
-  EXPECT_EQ(RunTestWithInvariantDebugging(&TestTry, threads, iterations,
-                                          operations, CheckSumG0G1),
-            operations);
-#endif
-}
-
-TEST_P(MutexVariableThreadCountTest, R20ms) {
-  int threads = GetParam();
-  int iterations = 100;
-  int operations = iterations * threads;
-  EXPECT_EQ(RunTest(&TestR20ms, threads, iterations, operations), 0);
-}
-
-TEST_P(MutexVariableThreadCountTest, RW) {
-  int threads = GetParam();
-  int iterations = ScaleIterations(20000000) / threads;
-  int operations = iterations * threads;
-  EXPECT_EQ(RunTest(&TestRW, threads, iterations, operations), operations / 2);
-#if !defined(ABSL_MUTEX_ENABLE_INVARIANT_DEBUGGING_NOT_IMPLEMENTED)
-  iterations = std::min(iterations, 10);
-  operations = threads * iterations;
-  EXPECT_EQ(RunTestWithInvariantDebugging(&TestRW, threads, iterations,
-                                          operations, CheckSumG0G1),
-            operations / 2);
-#endif
-}
-
-TEST_P(MutexVariableThreadCountTest, Await) {
-  int threads = GetParam();
-  int iterations = ScaleIterations(500000);
-  int operations = iterations;
-  EXPECT_EQ(RunTest(&TestAwait, threads, iterations, operations), operations);
-}
-
-TEST_P(MutexVariableThreadCountTest, SignalAll) {
-  int threads = GetParam();
-  int iterations = 200000 / threads;
-  int operations = iterations;
-  EXPECT_EQ(RunTest(&TestSignalAll, threads, iterations, operations),
-            operations);
-}
-
-TEST(Mutex, Signal) {
-  int threads = 2;  // TestSignal must use two threads
-  int iterations = 200000;
-  int operations = iterations;
-  EXPECT_EQ(RunTest(&TestSignal, threads, iterations, operations), operations);
-}
-
-TEST(Mutex, Timed) {
-  int threads = 10;  // Use a fixed thread count of 10
-  int iterations = 1000;
-  int operations = iterations;
-  EXPECT_EQ(RunTest(&TestCVTimeout, threads, iterations, operations),
-            operations);
-}
-
-TEST(Mutex, CVTime) {
-  int threads = 10;  // Use a fixed thread count of 10
-  int iterations = 1;
-  EXPECT_EQ(RunTest(&TestCVTime, threads, iterations, 1),
-            threads * iterations);
-}
-
-TEST(Mutex, MuTime) {
-  int threads = 10;  // Use a fixed thread count of 10
-  int iterations = 1;
-  EXPECT_EQ(RunTest(&TestMuTime, threads, iterations, 1), threads * iterations);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/synchronization/notification.cc b/third_party/abseil/absl/synchronization/notification.cc
deleted file mode 100644
index e91b903..0000000
--- a/third_party/abseil/absl/synchronization/notification.cc
+++ /dev/null
@@ -1,78 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/notification.h"
-
-#include <atomic>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-void Notification::Notify() {
-  MutexLock l(&this->mutex_);
-
-#ifndef NDEBUG
-  if (ABSL_PREDICT_FALSE(notified_yet_.load(std::memory_order_relaxed))) {
-    ABSL_RAW_LOG(
-        FATAL,
-        "Notify() method called more than once for Notification object %p",
-        static_cast<void *>(this));
-  }
-#endif
-
-  notified_yet_.store(true, std::memory_order_release);
-}
-
-Notification::~Notification() {
-  // Make sure that the thread running Notify() exits before the object is
-  // destructed.
-  MutexLock l(&this->mutex_);
-}
-
-void Notification::WaitForNotification() const {
-  if (!HasBeenNotifiedInternal(&this->notified_yet_)) {
-    this->mutex_.LockWhen(Condition(&HasBeenNotifiedInternal,
-                                    &this->notified_yet_));
-    this->mutex_.Unlock();
-  }
-}
-
-bool Notification::WaitForNotificationWithTimeout(
-    absl::Duration timeout) const {
-  bool notified = HasBeenNotifiedInternal(&this->notified_yet_);
-  if (!notified) {
-    notified = this->mutex_.LockWhenWithTimeout(
-        Condition(&HasBeenNotifiedInternal, &this->notified_yet_), timeout);
-    this->mutex_.Unlock();
-  }
-  return notified;
-}
-
-bool Notification::WaitForNotificationWithDeadline(absl::Time deadline) const {
-  bool notified = HasBeenNotifiedInternal(&this->notified_yet_);
-  if (!notified) {
-    notified = this->mutex_.LockWhenWithDeadline(
-        Condition(&HasBeenNotifiedInternal, &this->notified_yet_), deadline);
-    this->mutex_.Unlock();
-  }
-  return notified;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/synchronization/notification.h b/third_party/abseil/absl/synchronization/notification.h
deleted file mode 100644
index 9a354ca..0000000
--- a/third_party/abseil/absl/synchronization/notification.h
+++ /dev/null
@@ -1,123 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// notification.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines a `Notification` abstraction, which allows threads
-// to receive notification of a single occurrence of a single event.
-//
-// The `Notification` object maintains a private boolean "notified" state that
-// transitions to `true` at most once. The `Notification` class provides the
-// following primary member functions:
-//   * `HasBeenNotified() `to query its state
-//   * `WaitForNotification*()` to have threads wait until the "notified" state
-//      is `true`.
-//   * `Notify()` to set the notification's "notified" state to `true` and
-//     notify all waiting threads that the event has occurred.
-//     This method may only be called once.
-//
-// Note that while `Notify()` may only be called once, it is perfectly valid to
-// call any of the `WaitForNotification*()` methods multiple times, from
-// multiple threads -- even after the notification's "notified" state has been
-// set -- in which case those methods will immediately return.
-//
-// Note that the lifetime of a `Notification` requires careful consideration;
-// it might not be safe to destroy a notification after calling `Notify()` since
-// it is still legal for other threads to call `WaitForNotification*()` methods
-// on the notification. However, observers responding to a "notified" state of
-// `true` can safely delete the notification without interfering with the call
-// to `Notify()` in the other thread.
-//
-// Memory ordering: For any threads X and Y, if X calls `Notify()`, then any
-// action taken by X before it calls `Notify()` is visible to thread Y after:
-//  * Y returns from `WaitForNotification()`, or
-//  * Y receives a `true` return value from either `HasBeenNotified()` or
-//    `WaitForNotificationWithTimeout()`.
-
-#ifndef ABSL_SYNCHRONIZATION_NOTIFICATION_H_
-#define ABSL_SYNCHRONIZATION_NOTIFICATION_H_
-
-#include <atomic>
-
-#include "absl/base/macros.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// Notification
-// -----------------------------------------------------------------------------
-class Notification {
- public:
-  // Initializes the "notified" state to unnotified.
-  Notification() : notified_yet_(false) {}
-  explicit Notification(bool prenotify) : notified_yet_(prenotify) {}
-  Notification(const Notification&) = delete;
-  Notification& operator=(const Notification&) = delete;
-  ~Notification();
-
-  // Notification::HasBeenNotified()
-  //
-  // Returns the value of the notification's internal "notified" state.
-  bool HasBeenNotified() const {
-    return HasBeenNotifiedInternal(&this->notified_yet_);
-  }
-
-  // Notification::WaitForNotification()
-  //
-  // Blocks the calling thread until the notification's "notified" state is
-  // `true`. Note that if `Notify()` has been previously called on this
-  // notification, this function will immediately return.
-  void WaitForNotification() const;
-
-  // Notification::WaitForNotificationWithTimeout()
-  //
-  // Blocks until either the notification's "notified" state is `true` (which
-  // may occur immediately) or the timeout has elapsed, returning the value of
-  // its "notified" state in either case.
-  bool WaitForNotificationWithTimeout(absl::Duration timeout) const;
-
-  // Notification::WaitForNotificationWithDeadline()
-  //
-  // Blocks until either the notification's "notified" state is `true` (which
-  // may occur immediately) or the deadline has expired, returning the value of
-  // its "notified" state in either case.
-  bool WaitForNotificationWithDeadline(absl::Time deadline) const;
-
-  // Notification::Notify()
-  //
-  // Sets the "notified" state of this notification to `true` and wakes waiting
-  // threads. Note: do not call `Notify()` multiple times on the same
-  // `Notification`; calling `Notify()` more than once on the same notification
-  // results in undefined behavior.
-  void Notify();
-
- private:
-  static inline bool HasBeenNotifiedInternal(
-      const std::atomic<bool>* notified_yet) {
-    return notified_yet->load(std::memory_order_acquire);
-  }
-
-  mutable Mutex mutex_;
-  std::atomic<bool> notified_yet_;  // written under mutex_
-};
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_SYNCHRONIZATION_NOTIFICATION_H_
diff --git a/third_party/abseil/absl/synchronization/notification_test.cc b/third_party/abseil/absl/synchronization/notification_test.cc
deleted file mode 100644
index 100ea76..0000000
--- a/third_party/abseil/absl/synchronization/notification_test.cc
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/synchronization/notification.h"
-
-#include <thread>  // NOLINT(build/c++11)
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/synchronization/mutex.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// A thread-safe class that holds a counter.
-class ThreadSafeCounter {
- public:
-  ThreadSafeCounter() : count_(0) {}
-
-  void Increment() {
-    MutexLock lock(&mutex_);
-    ++count_;
-  }
-
-  int Get() const {
-    MutexLock lock(&mutex_);
-    return count_;
-  }
-
-  void WaitUntilGreaterOrEqual(int n) {
-    MutexLock lock(&mutex_);
-    auto cond = [this, n]() { return count_ >= n; };
-    mutex_.Await(Condition(&cond));
-  }
-
- private:
-  mutable Mutex mutex_;
-  int count_;
-};
-
-// Runs the |i|'th worker thread for the tests in BasicTests().  Increments the
-// |ready_counter|, waits on the |notification|, and then increments the
-// |done_counter|.
-static void RunWorker(int i, ThreadSafeCounter* ready_counter,
-                      Notification* notification,
-                      ThreadSafeCounter* done_counter) {
-  ready_counter->Increment();
-  notification->WaitForNotification();
-  done_counter->Increment();
-}
-
-// Tests that the |notification| properly blocks and awakens threads.  Assumes
-// that the |notification| is not yet triggered.  If |notify_before_waiting| is
-// true, the |notification| is triggered before any threads are created, so the
-// threads never block in WaitForNotification().  Otherwise, the |notification|
-// is triggered at a later point when most threads are likely to be blocking in
-// WaitForNotification().
-static void BasicTests(bool notify_before_waiting, Notification* notification) {
-  EXPECT_FALSE(notification->HasBeenNotified());
-  EXPECT_FALSE(
-      notification->WaitForNotificationWithTimeout(absl::Milliseconds(0)));
-  EXPECT_FALSE(notification->WaitForNotificationWithDeadline(absl::Now()));
-
-  const absl::Duration delay = absl::Milliseconds(50);
-  const absl::Time start = absl::Now();
-  EXPECT_FALSE(notification->WaitForNotificationWithTimeout(delay));
-  const absl::Duration elapsed = absl::Now() - start;
-
-  // Allow for a slight early return, to account for quality of implementation
-  // issues on various platforms.
-  const absl::Duration slop = absl::Microseconds(200);
-  EXPECT_LE(delay - slop, elapsed)
-      << "WaitForNotificationWithTimeout returned " << delay - elapsed
-      << " early (with " << slop << " slop), start time was " << start;
-
-  ThreadSafeCounter ready_counter;
-  ThreadSafeCounter done_counter;
-
-  if (notify_before_waiting) {
-    notification->Notify();
-  }
-
-  // Create a bunch of threads that increment the |done_counter| after being
-  // notified.
-  const int kNumThreads = 10;
-  std::vector<std::thread> workers;
-  for (int i = 0; i < kNumThreads; ++i) {
-    workers.push_back(std::thread(&RunWorker, i, &ready_counter, notification,
-                                  &done_counter));
-  }
-
-  if (!notify_before_waiting) {
-    ready_counter.WaitUntilGreaterOrEqual(kNumThreads);
-
-    // Workers have not been notified yet, so the |done_counter| should be
-    // unmodified.
-    EXPECT_EQ(0, done_counter.Get());
-
-    notification->Notify();
-  }
-
-  // After notifying and then joining the workers, both counters should be
-  // fully incremented.
-  notification->WaitForNotification();  // should exit immediately
-  EXPECT_TRUE(notification->HasBeenNotified());
-  EXPECT_TRUE(notification->WaitForNotificationWithTimeout(absl::Seconds(0)));
-  EXPECT_TRUE(notification->WaitForNotificationWithDeadline(absl::Now()));
-  for (std::thread& worker : workers) {
-    worker.join();
-  }
-  EXPECT_EQ(kNumThreads, ready_counter.Get());
-  EXPECT_EQ(kNumThreads, done_counter.Get());
-}
-
-TEST(NotificationTest, SanityTest) {
-  Notification local_notification1, local_notification2;
-  BasicTests(false, &local_notification1);
-  BasicTests(true, &local_notification2);
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/BUILD.bazel b/third_party/abseil/absl/time/BUILD.bazel
deleted file mode 100644
index 3e25ca2..0000000
--- a/third_party/abseil/absl/time/BUILD.bazel
+++ /dev/null
@@ -1,126 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "time",
-    srcs = [
-        "civil_time.cc",
-        "clock.cc",
-        "duration.cc",
-        "format.cc",
-        "internal/get_current_time_chrono.inc",
-        "internal/get_current_time_posix.inc",
-        "time.cc",
-    ],
-    hdrs = [
-        "civil_time.h",
-        "clock.h",
-        "time.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base",
-        "//absl/base:core_headers",
-        "//absl/base:raw_logging_internal",
-        "//absl/numeric:int128",
-        "//absl/strings",
-        "//absl/time/internal/cctz:civil_time",
-        "//absl/time/internal/cctz:time_zone",
-    ],
-)
-
-cc_library(
-    name = "test_util",
-    testonly = 1,
-    srcs = [
-        "internal/test_util.cc",
-        "internal/zoneinfo.inc",
-    ],
-    hdrs = ["internal/test_util.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = [
-        "//absl/time:__pkg__",
-    ],
-    deps = [
-        ":time",
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-        "//absl/time/internal/cctz:time_zone",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "time_test",
-    srcs = [
-        "civil_time_test.cc",
-        "clock_test.cc",
-        "duration_test.cc",
-        "format_test.cc",
-        "time_test.cc",
-        "time_zone_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":test_util",
-        ":time",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/numeric:int128",
-        "//absl/time/internal/cctz:time_zone",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "time_benchmark",
-    srcs = [
-        "civil_time_benchmark.cc",
-        "clock_benchmark.cc",
-        "duration_benchmark.cc",
-        "format_benchmark.cc",
-        "time_benchmark.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = [
-        "benchmark",
-    ],
-    deps = [
-        ":test_util",
-        ":time",
-        "//absl/base",
-        "//absl/base:core_headers",
-        "//absl/flags:flag",
-        "//absl/hash",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
diff --git a/third_party/abseil/absl/time/CMakeLists.txt b/third_party/abseil/absl/time/CMakeLists.txt
deleted file mode 100644
index 00bdd49..0000000
--- a/third_party/abseil/absl/time/CMakeLists.txt
+++ /dev/null
@@ -1,128 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    time
-  HDRS
-    "civil_time.h"
-    "clock.h"
-    "time.h"
-  SRCS
-    "civil_time.cc"
-    "clock.cc"
-    "duration.cc"
-    "format.cc"
-    "internal/get_current_time_chrono.inc"
-    "internal/get_current_time_posix.inc"
-    "time.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base
-    absl::civil_time
-    absl::core_headers
-    absl::int128
-    absl::raw_logging_internal
-    absl::strings
-    absl::time_zone
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    civil_time
-  HDRS
-    "internal/cctz/include/cctz/civil_time.h"
-    "internal/cctz/include/cctz/civil_time_detail.h"
-  SRCS
-  "internal/cctz/src/civil_time_detail.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-)
-
-if(APPLE)
-  find_library(CoreFoundation CoreFoundation)
-endif()
-
-absl_cc_library(
-  NAME
-    time_zone
-  HDRS
-    "internal/cctz/include/cctz/time_zone.h"
-    "internal/cctz/include/cctz/zone_info_source.h"
-  SRCS
-    "internal/cctz/src/time_zone_fixed.cc"
-    "internal/cctz/src/time_zone_fixed.h"
-    "internal/cctz/src/time_zone_format.cc"
-    "internal/cctz/src/time_zone_if.cc"
-    "internal/cctz/src/time_zone_if.h"
-    "internal/cctz/src/time_zone_impl.cc"
-    "internal/cctz/src/time_zone_impl.h"
-    "internal/cctz/src/time_zone_info.cc"
-    "internal/cctz/src/time_zone_info.h"
-    "internal/cctz/src/time_zone_libc.cc"
-    "internal/cctz/src/time_zone_libc.h"
-    "internal/cctz/src/time_zone_lookup.cc"
-    "internal/cctz/src/time_zone_posix.cc"
-    "internal/cctz/src/time_zone_posix.h"
-    "internal/cctz/src/tzfile.h"
-    "internal/cctz/src/zone_info_source.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    $<$<PLATFORM_ID:Darwin>:${CoreFoundation}>
-)
-
-absl_cc_library(
-  NAME
-    time_internal_test_util
-  HDRS
-    "internal/test_util.h"
-  SRCS
-    "internal/test_util.cc"
-    "internal/zoneinfo.inc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::time
-    absl::config
-    absl::raw_logging_internal
-    absl::time_zone
-    gmock
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    time_test
-  SRCS
-    "civil_time_test.cc"
-    "clock_test.cc"
-    "duration_test.cc"
-    "format_test.cc"
-    "time_test.cc"
-    "time_zone_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::time_internal_test_util
-    absl::time
-    absl::config
-    absl::core_headers
-    absl::time_zone
-    gmock_main
-)
diff --git a/third_party/abseil/absl/time/civil_time.cc b/third_party/abseil/absl/time/civil_time.cc
deleted file mode 100644
index bdfe9ce..0000000
--- a/third_party/abseil/absl/time/civil_time.cc
+++ /dev/null
@@ -1,175 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/civil_time.h"
-
-#include <cstdlib>
-#include <string>
-
-#include "absl/strings/str_cat.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-// Since a civil time has a larger year range than absl::Time (64-bit years vs
-// 64-bit seconds, respectively) we normalize years to roughly +/- 400 years
-// around the year 2400, which will produce an equivalent year in a range that
-// absl::Time can handle.
-inline civil_year_t NormalizeYear(civil_year_t year) {
-  return 2400 + year % 400;
-}
-
-// Formats the given CivilSecond according to the given format.
-std::string FormatYearAnd(string_view fmt, CivilSecond cs) {
-  const CivilSecond ncs(NormalizeYear(cs.year()), cs.month(), cs.day(),
-                        cs.hour(), cs.minute(), cs.second());
-  const TimeZone utc = UTCTimeZone();
-  // TODO(absl-team): Avoid conversion of fmt string.
-  return StrCat(cs.year(),
-                FormatTime(std::string(fmt), FromCivil(ncs, utc), utc));
-}
-
-template <typename CivilT>
-bool ParseYearAnd(string_view fmt, string_view s, CivilT* c) {
-  // Civil times support a larger year range than absl::Time, so we need to
-  // parse the year separately, normalize it, then use absl::ParseTime on the
-  // normalized string.
-  const std::string ss = std::string(s);  // TODO(absl-team): Avoid conversion.
-  const char* const np = ss.c_str();
-  char* endp;
-  errno = 0;
-  const civil_year_t y =
-      std::strtoll(np, &endp, 10);  // NOLINT(runtime/deprecated_fn)
-  if (endp == np || errno == ERANGE) return false;
-  const std::string norm = StrCat(NormalizeYear(y), endp);
-
-  const TimeZone utc = UTCTimeZone();
-  Time t;
-  if (ParseTime(StrCat("%Y", fmt), norm, utc, &t, nullptr)) {
-    const auto cs = ToCivilSecond(t, utc);
-    *c = CivilT(y, cs.month(), cs.day(), cs.hour(), cs.minute(), cs.second());
-    return true;
-  }
-
-  return false;
-}
-
-// Tries to parse the type as a CivilT1, but then assigns the result to the
-// argument of type CivilT2.
-template <typename CivilT1, typename CivilT2>
-bool ParseAs(string_view s, CivilT2* c) {
-  CivilT1 t1;
-  if (ParseCivilTime(s, &t1)) {
-    *c = CivilT2(t1);
-    return true;
-  }
-  return false;
-}
-
-template <typename CivilT>
-bool ParseLenient(string_view s, CivilT* c) {
-  // A fastpath for when the given string data parses exactly into the given
-  // type T (e.g., s="YYYY-MM-DD" and CivilT=CivilDay).
-  if (ParseCivilTime(s, c)) return true;
-  // Try parsing as each of the 6 types, trying the most common types first
-  // (based on csearch results).
-  if (ParseAs<CivilDay>(s, c)) return true;
-  if (ParseAs<CivilSecond>(s, c)) return true;
-  if (ParseAs<CivilHour>(s, c)) return true;
-  if (ParseAs<CivilMonth>(s, c)) return true;
-  if (ParseAs<CivilMinute>(s, c)) return true;
-  if (ParseAs<CivilYear>(s, c)) return true;
-  return false;
-}
-}  // namespace
-
-std::string FormatCivilTime(CivilSecond c) {
-  return FormatYearAnd("-%m-%d%ET%H:%M:%S", c);
-}
-std::string FormatCivilTime(CivilMinute c) {
-  return FormatYearAnd("-%m-%d%ET%H:%M", c);
-}
-std::string FormatCivilTime(CivilHour c) {
-  return FormatYearAnd("-%m-%d%ET%H", c);
-}
-std::string FormatCivilTime(CivilDay c) { return FormatYearAnd("-%m-%d", c); }
-std::string FormatCivilTime(CivilMonth c) { return FormatYearAnd("-%m", c); }
-std::string FormatCivilTime(CivilYear c) { return FormatYearAnd("", c); }
-
-bool ParseCivilTime(string_view s, CivilSecond* c) {
-  return ParseYearAnd("-%m-%d%ET%H:%M:%S", s, c);
-}
-bool ParseCivilTime(string_view s, CivilMinute* c) {
-  return ParseYearAnd("-%m-%d%ET%H:%M", s, c);
-}
-bool ParseCivilTime(string_view s, CivilHour* c) {
-  return ParseYearAnd("-%m-%d%ET%H", s, c);
-}
-bool ParseCivilTime(string_view s, CivilDay* c) {
-  return ParseYearAnd("-%m-%d", s, c);
-}
-bool ParseCivilTime(string_view s, CivilMonth* c) {
-  return ParseYearAnd("-%m", s, c);
-}
-bool ParseCivilTime(string_view s, CivilYear* c) {
-  return ParseYearAnd("", s, c);
-}
-
-bool ParseLenientCivilTime(string_view s, CivilSecond* c) {
-  return ParseLenient(s, c);
-}
-bool ParseLenientCivilTime(string_view s, CivilMinute* c) {
-  return ParseLenient(s, c);
-}
-bool ParseLenientCivilTime(string_view s, CivilHour* c) {
-  return ParseLenient(s, c);
-}
-bool ParseLenientCivilTime(string_view s, CivilDay* c) {
-  return ParseLenient(s, c);
-}
-bool ParseLenientCivilTime(string_view s, CivilMonth* c) {
-  return ParseLenient(s, c);
-}
-bool ParseLenientCivilTime(string_view s, CivilYear* c) {
-  return ParseLenient(s, c);
-}
-
-namespace time_internal {
-
-std::ostream& operator<<(std::ostream& os, CivilYear y) {
-  return os << FormatCivilTime(y);
-}
-std::ostream& operator<<(std::ostream& os, CivilMonth m) {
-  return os << FormatCivilTime(m);
-}
-std::ostream& operator<<(std::ostream& os, CivilDay d) {
-  return os << FormatCivilTime(d);
-}
-std::ostream& operator<<(std::ostream& os, CivilHour h) {
-  return os << FormatCivilTime(h);
-}
-std::ostream& operator<<(std::ostream& os, CivilMinute m) {
-  return os << FormatCivilTime(m);
-}
-std::ostream& operator<<(std::ostream& os, CivilSecond s) {
-  return os << FormatCivilTime(s);
-}
-
-}  // namespace time_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/civil_time.h b/third_party/abseil/absl/time/civil_time.h
deleted file mode 100644
index bb46004..0000000
--- a/third_party/abseil/absl/time/civil_time.h
+++ /dev/null
@@ -1,538 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: civil_time.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines abstractions for computing with "civil time".
-// The term "civil time" refers to the legally recognized human-scale time
-// that is represented by the six fields `YYYY-MM-DD hh:mm:ss`. A "date"
-// is perhaps the most common example of a civil time (represented here as
-// an `absl::CivilDay`).
-//
-// Modern-day civil time follows the Gregorian Calendar and is a
-// time-zone-independent concept: a civil time of "2015-06-01 12:00:00", for
-// example, is not tied to a time zone. Put another way, a civil time does not
-// map to a unique point in time; a civil time must be mapped to an absolute
-// time *through* a time zone.
-//
-// Because a civil time is what most people think of as "time," it is common to
-// map absolute times to civil times to present to users.
-//
-// Time zones define the relationship between absolute and civil times. Given an
-// absolute or civil time and a time zone, you can compute the other time:
-//
-//   Civil Time = F(Absolute Time, Time Zone)
-//   Absolute Time = G(Civil Time, Time Zone)
-//
-// The Abseil time library allows you to construct such civil times from
-// absolute times; consult time.h for such functionality.
-//
-// This library provides six classes for constructing civil-time objects, and
-// provides several helper functions for rounding, iterating, and performing
-// arithmetic on civil-time objects, while avoiding complications like
-// daylight-saving time (DST):
-//
-//   * `absl::CivilSecond`
-//   * `absl::CivilMinute`
-//   * `absl::CivilHour`
-//   * `absl::CivilDay`
-//   * `absl::CivilMonth`
-//   * `absl::CivilYear`
-//
-// Example:
-//
-//   // Construct a civil-time object for a specific day
-//   const absl::CivilDay cd(1969, 07, 20);
-//
-//   // Construct a civil-time object for a specific second
-//   const absl::CivilSecond cd(2018, 8, 1, 12, 0, 1);
-//
-// Note: In C++14 and later, this library is usable in a constexpr context.
-//
-// Example:
-//
-//   // Valid in C++14
-//   constexpr absl::CivilDay cd(1969, 07, 20);
-
-#ifndef ABSL_TIME_CIVIL_TIME_H_
-#define ABSL_TIME_CIVIL_TIME_H_
-
-#include <string>
-
-#include "absl/strings/string_view.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace time_internal {
-struct second_tag : cctz::detail::second_tag {};
-struct minute_tag : second_tag, cctz::detail::minute_tag {};
-struct hour_tag : minute_tag, cctz::detail::hour_tag {};
-struct day_tag : hour_tag, cctz::detail::day_tag {};
-struct month_tag : day_tag, cctz::detail::month_tag {};
-struct year_tag : month_tag, cctz::detail::year_tag {};
-}  // namespace time_internal
-
-// -----------------------------------------------------------------------------
-// CivilSecond, CivilMinute, CivilHour, CivilDay, CivilMonth, CivilYear
-// -----------------------------------------------------------------------------
-//
-// Each of these civil-time types is a simple value type with the same
-// interface for construction and the same six accessors for each of the civil
-// time fields (year, month, day, hour, minute, and second, aka YMDHMS). These
-// classes differ only in their alignment, which is indicated by the type name
-// and specifies the field on which arithmetic operates.
-//
-// CONSTRUCTION
-//
-// Each of the civil-time types can be constructed in two ways: by directly
-// passing to the constructor up to six integers representing the YMDHMS fields,
-// or by copying the YMDHMS fields from a differently aligned civil-time type.
-// Omitted fields are assigned their minimum valid value. Hours, minutes, and
-// seconds will be set to 0, month and day will be set to 1. Since there is no
-// minimum year, the default is 1970.
-//
-// Examples:
-//
-//   absl::CivilDay default_value;               // 1970-01-01 00:00:00
-//
-//   absl::CivilDay a(2015, 2, 3);               // 2015-02-03 00:00:00
-//   absl::CivilDay b(2015, 2, 3, 4, 5, 6);      // 2015-02-03 00:00:00
-//   absl::CivilDay c(2015);                     // 2015-01-01 00:00:00
-//
-//   absl::CivilSecond ss(2015, 2, 3, 4, 5, 6);  // 2015-02-03 04:05:06
-//   absl::CivilMinute mm(ss);                   // 2015-02-03 04:05:00
-//   absl::CivilHour hh(mm);                     // 2015-02-03 04:00:00
-//   absl::CivilDay d(hh);                       // 2015-02-03 00:00:00
-//   absl::CivilMonth m(d);                      // 2015-02-01 00:00:00
-//   absl::CivilYear y(m);                       // 2015-01-01 00:00:00
-//
-//   m = absl::CivilMonth(y);                    // 2015-01-01 00:00:00
-//   d = absl::CivilDay(m);                      // 2015-01-01 00:00:00
-//   hh = absl::CivilHour(d);                    // 2015-01-01 00:00:00
-//   mm = absl::CivilMinute(hh);                 // 2015-01-01 00:00:00
-//   ss = absl::CivilSecond(mm);                 // 2015-01-01 00:00:00
-//
-// Each civil-time class is aligned to the civil-time field indicated in the
-// class's name after normalization. Alignment is performed by setting all the
-// inferior fields to their minimum valid value (as described above). The
-// following are examples of how each of the six types would align the fields
-// representing November 22, 2015 at 12:34:56 in the afternoon. (Note: the
-// string format used here is not important; it's just a shorthand way of
-// showing the six YMDHMS fields.)
-//
-//   absl::CivilSecond   : 2015-11-22 12:34:56
-//   absl::CivilMinute   : 2015-11-22 12:34:00
-//   absl::CivilHour     : 2015-11-22 12:00:00
-//   absl::CivilDay      : 2015-11-22 00:00:00
-//   absl::CivilMonth    : 2015-11-01 00:00:00
-//   absl::CivilYear     : 2015-01-01 00:00:00
-//
-// Each civil-time type performs arithmetic on the field to which it is
-// aligned. This means that adding 1 to an absl::CivilDay increments the day
-// field (normalizing as necessary), and subtracting 7 from an absl::CivilMonth
-// operates on the month field (normalizing as necessary). All arithmetic
-// produces a valid civil time. Difference requires two similarly aligned
-// civil-time objects and returns the scalar answer in units of the objects'
-// alignment. For example, the difference between two absl::CivilHour objects
-// will give an answer in units of civil hours.
-//
-// ALIGNMENT CONVERSION
-//
-// The alignment of a civil-time object cannot change, but the object may be
-// used to construct a new object with a different alignment. This is referred
-// to as "realigning". When realigning to a type with the same or more
-// precision (e.g., absl::CivilDay -> absl::CivilSecond), the conversion may be
-// performed implicitly since no information is lost. However, if information
-// could be discarded (e.g., CivilSecond -> CivilDay), the conversion must
-// be explicit at the call site.
-//
-// Examples:
-//
-//   void UseDay(absl::CivilDay day);
-//
-//   absl::CivilSecond cs;
-//   UseDay(cs);                  // Won't compile because data may be discarded
-//   UseDay(absl::CivilDay(cs));  // OK: explicit conversion
-//
-//   absl::CivilDay cd;
-//   UseDay(cd);                  // OK: no conversion needed
-//
-//   absl::CivilMonth cm;
-//   UseDay(cm);                  // OK: implicit conversion to absl::CivilDay
-//
-// NORMALIZATION
-//
-// Normalization takes invalid values and adjusts them to produce valid values.
-// Within the civil-time library, integer arguments passed to the Civil*
-// constructors may be out-of-range, in which case they are normalized by
-// carrying overflow into a field of courser granularity to produce valid
-// civil-time objects. This normalization enables natural arithmetic on
-// constructor arguments without worrying about the field's range.
-//
-// Examples:
-//
-//   // Out-of-range; normalized to 2016-11-01
-//   absl::CivilDay d(2016, 10, 32);
-//   // Out-of-range, negative: normalized to 2016-10-30T23
-//   absl::CivilHour h1(2016, 10, 31, -1);
-//   // Normalization is cumulative: normalized to 2016-10-30T23
-//   absl::CivilHour h2(2016, 10, 32, -25);
-//
-// Note: If normalization is undesired, you can signal an error by comparing
-// the constructor arguments to the normalized values returned by the YMDHMS
-// properties.
-//
-// COMPARISON
-//
-// Comparison between civil-time objects considers all six YMDHMS fields,
-// regardless of the type's alignment. Comparison between differently aligned
-// civil-time types is allowed.
-//
-// Examples:
-//
-//   absl::CivilDay feb_3(2015, 2, 3);  // 2015-02-03 00:00:00
-//   absl::CivilDay mar_4(2015, 3, 4);  // 2015-03-04 00:00:00
-//   // feb_3 < mar_4
-//   // absl::CivilYear(feb_3) == absl::CivilYear(mar_4)
-//
-//   absl::CivilSecond feb_3_noon(2015, 2, 3, 12, 0, 0);  // 2015-02-03 12:00:00
-//   // feb_3 < feb_3_noon
-//   // feb_3 == absl::CivilDay(feb_3_noon)
-//
-//   // Iterates all the days of February 2015.
-//   for (absl::CivilDay d(2015, 2, 1); d < absl::CivilMonth(2015, 3); ++d) {
-//     // ...
-//   }
-//
-// ARITHMETIC
-//
-// Civil-time types support natural arithmetic operators such as addition,
-// subtraction, and difference. Arithmetic operates on the civil-time field
-// indicated in the type's name. Difference operators require arguments with
-// the same alignment and return the answer in units of the alignment.
-//
-// Example:
-//
-//   absl::CivilDay a(2015, 2, 3);
-//   ++a;                              // 2015-02-04 00:00:00
-//   --a;                              // 2015-02-03 00:00:00
-//   absl::CivilDay b = a + 1;         // 2015-02-04 00:00:00
-//   absl::CivilDay c = 1 + b;         // 2015-02-05 00:00:00
-//   int n = c - a;                    // n = 2 (civil days)
-//   int m = c - absl::CivilMonth(c);  // Won't compile: different types.
-//
-// ACCESSORS
-//
-// Each civil-time type has accessors for all six of the civil-time fields:
-// year, month, day, hour, minute, and second.
-//
-// civil_year_t year()
-// int          month()
-// int          day()
-// int          hour()
-// int          minute()
-// int          second()
-//
-// Recall that fields inferior to the type's alignment will be set to their
-// minimum valid value.
-//
-// Example:
-//
-//   absl::CivilDay d(2015, 6, 28);
-//   // d.year() == 2015
-//   // d.month() == 6
-//   // d.day() == 28
-//   // d.hour() == 0
-//   // d.minute() == 0
-//   // d.second() == 0
-//
-// CASE STUDY: Adding a month to January 31.
-//
-// One of the classic questions that arises when considering a civil time
-// library (or a date library or a date/time library) is this:
-//   "What is the result of adding a month to January 31?"
-// This is an interesting question because it is unclear what is meant by a
-// "month", and several different answers are possible, depending on context:
-//
-//   1. March 3 (or 2 if a leap year), if "add a month" means to add a month to
-//      the current month, and adjust the date to overflow the extra days into
-//      March. In this case the result of "February 31" would be normalized as
-//      within the civil-time library.
-//   2. February 28 (or 29 if a leap year), if "add a month" means to add a
-//      month, and adjust the date while holding the resulting month constant.
-//      In this case, the result of "February 31" would be truncated to the last
-//      day in February.
-//   3. An error. The caller may get some error, an exception, an invalid date
-//      object, or perhaps return `false`. This may make sense because there is
-//      no single unambiguously correct answer to the question.
-//
-// Practically speaking, any answer that is not what the programmer intended
-// is the wrong answer.
-//
-// The Abseil time library avoids this problem by making it impossible to
-// ask ambiguous questions. All civil-time objects are aligned to a particular
-// civil-field boundary (such as aligned to a year, month, day, hour, minute,
-// or second), and arithmetic operates on the field to which the object is
-// aligned. This means that in order to "add a month" the object must first be
-// aligned to a month boundary, which is equivalent to the first day of that
-// month.
-//
-// Of course, there are ways to compute an answer the question at hand using
-// this Abseil time library, but they require the programmer to be explicit
-// about the answer they expect. To illustrate, let's see how to compute all
-// three of the above possible answers to the question of "Jan 31 plus 1
-// month":
-//
-// Example:
-//
-//   const absl::CivilDay d(2015, 1, 31);
-//
-//   // Answer 1:
-//   // Add 1 to the month field in the constructor, and rely on normalization.
-//   const auto normalized = absl::CivilDay(d.year(), d.month() + 1, d.day());
-//   // normalized == 2015-03-03 (aka Feb 31)
-//
-//   // Answer 2:
-//   // Add 1 to month field, capping to the end of next month.
-//   const auto next_month = absl::CivilMonth(d) + 1;
-//   const auto last_day_of_next_month = absl::CivilDay(next_month + 1) - 1;
-//   const auto capped = std::min(normalized, last_day_of_next_month);
-//   // capped == 2015-02-28
-//
-//   // Answer 3:
-//   // Signal an error if the normalized answer is not in next month.
-//   if (absl::CivilMonth(normalized) != next_month) {
-//     // error, month overflow
-//   }
-//
-using CivilSecond =
-    time_internal::cctz::detail::civil_time<time_internal::second_tag>;
-using CivilMinute =
-    time_internal::cctz::detail::civil_time<time_internal::minute_tag>;
-using CivilHour =
-    time_internal::cctz::detail::civil_time<time_internal::hour_tag>;
-using CivilDay =
-    time_internal::cctz::detail::civil_time<time_internal::day_tag>;
-using CivilMonth =
-    time_internal::cctz::detail::civil_time<time_internal::month_tag>;
-using CivilYear =
-    time_internal::cctz::detail::civil_time<time_internal::year_tag>;
-
-// civil_year_t
-//
-// Type alias of a civil-time year value. This type is guaranteed to (at least)
-// support any year value supported by `time_t`.
-//
-// Example:
-//
-//   absl::CivilSecond cs = ...;
-//   absl::civil_year_t y = cs.year();
-//   cs = absl::CivilSecond(y, 1, 1, 0, 0, 0);  // CivilSecond(CivilYear(cs))
-//
-using civil_year_t = time_internal::cctz::year_t;
-
-// civil_diff_t
-//
-// Type alias of the difference between two civil-time values.
-// This type is used to indicate arguments that are not
-// normalized (such as parameters to the civil-time constructors), the results
-// of civil-time subtraction, or the operand to civil-time addition.
-//
-// Example:
-//
-//   absl::civil_diff_t n_sec = cs1 - cs2;             // cs1 == cs2 + n_sec;
-//
-using civil_diff_t = time_internal::cctz::diff_t;
-
-// Weekday::monday, Weekday::tuesday, Weekday::wednesday, Weekday::thursday,
-// Weekday::friday, Weekday::saturday, Weekday::sunday
-//
-// The Weekday enum class represents the civil-time concept of a "weekday" with
-// members for all days of the week.
-//
-//   absl::Weekday wd = absl::Weekday::thursday;
-//
-using Weekday = time_internal::cctz::weekday;
-
-// GetWeekday()
-//
-// Returns the absl::Weekday for the given (realigned) civil-time value.
-//
-// Example:
-//
-//   absl::CivilDay a(2015, 8, 13);
-//   absl::Weekday wd = absl::GetWeekday(a);  // wd == absl::Weekday::thursday
-//
-inline Weekday GetWeekday(CivilSecond cs) {
-  return time_internal::cctz::get_weekday(cs);
-}
-
-// NextWeekday()
-// PrevWeekday()
-//
-// Returns the absl::CivilDay that strictly follows or precedes a given
-// absl::CivilDay, and that falls on the given absl::Weekday.
-//
-// Example, given the following month:
-//
-//       August 2015
-//   Su Mo Tu We Th Fr Sa
-//                      1
-//    2  3  4  5  6  7  8
-//    9 10 11 12 13 14 15
-//   16 17 18 19 20 21 22
-//   23 24 25 26 27 28 29
-//   30 31
-//
-//   absl::CivilDay a(2015, 8, 13);
-//   // absl::GetWeekday(a) == absl::Weekday::thursday
-//   absl::CivilDay b = absl::NextWeekday(a, absl::Weekday::thursday);
-//   // b = 2015-08-20
-//   absl::CivilDay c = absl::PrevWeekday(a, absl::Weekday::thursday);
-//   // c = 2015-08-06
-//
-//   absl::CivilDay d = ...
-//   // Gets the following Thursday if d is not already Thursday
-//   absl::CivilDay thurs1 = absl::NextWeekday(d - 1, absl::Weekday::thursday);
-//   // Gets the previous Thursday if d is not already Thursday
-//   absl::CivilDay thurs2 = absl::PrevWeekday(d + 1, absl::Weekday::thursday);
-//
-inline CivilDay NextWeekday(CivilDay cd, Weekday wd) {
-  return CivilDay(time_internal::cctz::next_weekday(cd, wd));
-}
-inline CivilDay PrevWeekday(CivilDay cd, Weekday wd) {
-  return CivilDay(time_internal::cctz::prev_weekday(cd, wd));
-}
-
-// GetYearDay()
-//
-// Returns the day-of-year for the given (realigned) civil-time value.
-//
-// Example:
-//
-//   absl::CivilDay a(2015, 1, 1);
-//   int yd_jan_1 = absl::GetYearDay(a);   // yd_jan_1 = 1
-//   absl::CivilDay b(2015, 12, 31);
-//   int yd_dec_31 = absl::GetYearDay(b);  // yd_dec_31 = 365
-//
-inline int GetYearDay(CivilSecond cs) {
-  return time_internal::cctz::get_yearday(cs);
-}
-
-// FormatCivilTime()
-//
-// Formats the given civil-time value into a string value of the following
-// format:
-//
-//  Type        | Format
-//  ---------------------------------
-//  CivilSecond | YYYY-MM-DDTHH:MM:SS
-//  CivilMinute | YYYY-MM-DDTHH:MM
-//  CivilHour   | YYYY-MM-DDTHH
-//  CivilDay    | YYYY-MM-DD
-//  CivilMonth  | YYYY-MM
-//  CivilYear   | YYYY
-//
-// Example:
-//
-//   absl::CivilDay d = absl::CivilDay(1969, 7, 20);
-//   std::string day_string = absl::FormatCivilTime(d);  // "1969-07-20"
-//
-std::string FormatCivilTime(CivilSecond c);
-std::string FormatCivilTime(CivilMinute c);
-std::string FormatCivilTime(CivilHour c);
-std::string FormatCivilTime(CivilDay c);
-std::string FormatCivilTime(CivilMonth c);
-std::string FormatCivilTime(CivilYear c);
-
-// absl::ParseCivilTime()
-//
-// Parses a civil-time value from the specified `absl::string_view` into the
-// passed output parameter. Returns `true` upon successful parsing.
-//
-// The expected form of the input string is as follows:
-//
-//  Type        | Format
-//  ---------------------------------
-//  CivilSecond | YYYY-MM-DDTHH:MM:SS
-//  CivilMinute | YYYY-MM-DDTHH:MM
-//  CivilHour   | YYYY-MM-DDTHH
-//  CivilDay    | YYYY-MM-DD
-//  CivilMonth  | YYYY-MM
-//  CivilYear   | YYYY
-//
-// Example:
-//
-//   absl::CivilDay d;
-//   bool ok = absl::ParseCivilTime("2018-01-02", &d); // OK
-//
-// Note that parsing will fail if the string's format does not match the
-// expected type exactly. `ParseLenientCivilTime()` below is more lenient.
-//
-bool ParseCivilTime(absl::string_view s, CivilSecond* c);
-bool ParseCivilTime(absl::string_view s, CivilMinute* c);
-bool ParseCivilTime(absl::string_view s, CivilHour* c);
-bool ParseCivilTime(absl::string_view s, CivilDay* c);
-bool ParseCivilTime(absl::string_view s, CivilMonth* c);
-bool ParseCivilTime(absl::string_view s, CivilYear* c);
-
-// ParseLenientCivilTime()
-//
-// Parses any of the formats accepted by `absl::ParseCivilTime()`, but is more
-// lenient if the format of the string does not exactly match the associated
-// type.
-//
-// Example:
-//
-//   absl::CivilDay d;
-//   bool ok = absl::ParseLenientCivilTime("1969-07-20", &d); // OK
-//   ok = absl::ParseLenientCivilTime("1969-07-20T10", &d);   // OK: T10 floored
-//   ok = absl::ParseLenientCivilTime("1969-07", &d);   // OK: day defaults to 1
-//
-bool ParseLenientCivilTime(absl::string_view s, CivilSecond* c);
-bool ParseLenientCivilTime(absl::string_view s, CivilMinute* c);
-bool ParseLenientCivilTime(absl::string_view s, CivilHour* c);
-bool ParseLenientCivilTime(absl::string_view s, CivilDay* c);
-bool ParseLenientCivilTime(absl::string_view s, CivilMonth* c);
-bool ParseLenientCivilTime(absl::string_view s, CivilYear* c);
-
-namespace time_internal {  // For functions found via ADL on civil-time tags.
-
-// Streaming Operators
-//
-// Each civil-time type may be sent to an output stream using operator<<().
-// The result matches the string produced by `FormatCivilTime()`.
-//
-// Example:
-//
-//   absl::CivilDay d = absl::CivilDay(1969, 7, 20);
-//   std::cout << "Date is: " << d << "\n";
-//
-std::ostream& operator<<(std::ostream& os, CivilYear y);
-std::ostream& operator<<(std::ostream& os, CivilMonth m);
-std::ostream& operator<<(std::ostream& os, CivilDay d);
-std::ostream& operator<<(std::ostream& os, CivilHour h);
-std::ostream& operator<<(std::ostream& os, CivilMinute m);
-std::ostream& operator<<(std::ostream& os, CivilSecond s);
-
-}  // namespace time_internal
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_CIVIL_TIME_H_
diff --git a/third_party/abseil/absl/time/civil_time_benchmark.cc b/third_party/abseil/absl/time/civil_time_benchmark.cc
deleted file mode 100644
index f04dbe2..0000000
--- a/third_party/abseil/absl/time/civil_time_benchmark.cc
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/civil_time.h"
-
-#include <numeric>
-#include <vector>
-
-#include "absl/hash/hash.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-// Run on (12 X 3492 MHz CPUs); 2018-11-05T13:44:29.814239103-08:00
-// CPU: Intel Haswell with HyperThreading (6 cores) dL1:32KB dL2:256KB dL3:15MB
-// Benchmark                 Time(ns)        CPU(ns)     Iterations
-// ----------------------------------------------------------------
-// BM_Difference_Days              14.5           14.5     48531105
-// BM_Step_Days                    12.6           12.6     54876006
-// BM_Format                      587            587        1000000
-// BM_Parse                       692            692        1000000
-// BM_RoundTripFormatParse       1309           1309         532075
-// BM_CivilYearAbslHash             0.710          0.710  976400000
-// BM_CivilMonthAbslHash            1.13           1.13   619500000
-// BM_CivilDayAbslHash              1.70           1.70   426000000
-// BM_CivilHourAbslHash             2.45           2.45   287600000
-// BM_CivilMinuteAbslHash           3.21           3.21   226200000
-// BM_CivilSecondAbslHash           4.10           4.10   171800000
-
-void BM_Difference_Days(benchmark::State& state) {
-  const absl::CivilDay c(2014, 8, 22);
-  const absl::CivilDay epoch(1970, 1, 1);
-  while (state.KeepRunning()) {
-    const absl::civil_diff_t n = c - epoch;
-    benchmark::DoNotOptimize(n);
-  }
-}
-BENCHMARK(BM_Difference_Days);
-
-void BM_Step_Days(benchmark::State& state) {
-  const absl::CivilDay kStart(2014, 8, 22);
-  absl::CivilDay c = kStart;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(++c);
-  }
-}
-BENCHMARK(BM_Step_Days);
-
-void BM_Format(benchmark::State& state) {
-  const absl::CivilSecond c(2014, 1, 2, 3, 4, 5);
-  while (state.KeepRunning()) {
-    const std::string s = absl::FormatCivilTime(c);
-    benchmark::DoNotOptimize(s);
-  }
-}
-BENCHMARK(BM_Format);
-
-void BM_Parse(benchmark::State& state) {
-  const std::string f = "2014-01-02T03:04:05";
-  absl::CivilSecond c;
-  while (state.KeepRunning()) {
-    const bool b = absl::ParseCivilTime(f, &c);
-    benchmark::DoNotOptimize(b);
-  }
-}
-BENCHMARK(BM_Parse);
-
-void BM_RoundTripFormatParse(benchmark::State& state) {
-  const absl::CivilSecond c(2014, 1, 2, 3, 4, 5);
-  absl::CivilSecond out;
-  while (state.KeepRunning()) {
-    const bool b = absl::ParseCivilTime(absl::FormatCivilTime(c), &out);
-    benchmark::DoNotOptimize(b);
-  }
-}
-BENCHMARK(BM_RoundTripFormatParse);
-
-template <typename T>
-void BM_CivilTimeAbslHash(benchmark::State& state) {
-  const int kSize = 100000;
-  std::vector<T> civil_times(kSize);
-  std::iota(civil_times.begin(), civil_times.end(), T(2018));
-
-  absl::Hash<T> absl_hasher;
-  while (state.KeepRunningBatch(kSize)) {
-    for (const T civil_time : civil_times) {
-      benchmark::DoNotOptimize(absl_hasher(civil_time));
-    }
-  }
-}
-void BM_CivilYearAbslHash(benchmark::State& state) {
-  BM_CivilTimeAbslHash<absl::CivilYear>(state);
-}
-void BM_CivilMonthAbslHash(benchmark::State& state) {
-  BM_CivilTimeAbslHash<absl::CivilMonth>(state);
-}
-void BM_CivilDayAbslHash(benchmark::State& state) {
-  BM_CivilTimeAbslHash<absl::CivilDay>(state);
-}
-void BM_CivilHourAbslHash(benchmark::State& state) {
-  BM_CivilTimeAbslHash<absl::CivilHour>(state);
-}
-void BM_CivilMinuteAbslHash(benchmark::State& state) {
-  BM_CivilTimeAbslHash<absl::CivilMinute>(state);
-}
-void BM_CivilSecondAbslHash(benchmark::State& state) {
-  BM_CivilTimeAbslHash<absl::CivilSecond>(state);
-}
-BENCHMARK(BM_CivilYearAbslHash);
-BENCHMARK(BM_CivilMonthAbslHash);
-BENCHMARK(BM_CivilDayAbslHash);
-BENCHMARK(BM_CivilHourAbslHash);
-BENCHMARK(BM_CivilMinuteAbslHash);
-BENCHMARK(BM_CivilSecondAbslHash);
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/civil_time_test.cc b/third_party/abseil/absl/time/civil_time_test.cc
deleted file mode 100644
index 0ebd97a..0000000
--- a/third_party/abseil/absl/time/civil_time_test.cc
+++ /dev/null
@@ -1,1243 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/civil_time.h"
-
-#include <limits>
-#include <sstream>
-#include <type_traits>
-
-#include "absl/base/macros.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(CivilTime, DefaultConstruction) {
-  absl::CivilSecond ss;
-  EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss));
-
-  absl::CivilMinute mm;
-  EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm));
-
-  absl::CivilHour hh;
-  EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh));
-
-  absl::CivilDay d;
-  EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d));
-
-  absl::CivilMonth m;
-  EXPECT_EQ("1970-01", absl::FormatCivilTime(m));
-
-  absl::CivilYear y;
-  EXPECT_EQ("1970", absl::FormatCivilTime(y));
-}
-
-TEST(CivilTime, StructMember) {
-  struct S {
-    absl::CivilDay day;
-  };
-  S s = {};
-  EXPECT_EQ(absl::CivilDay{}, s.day);
-}
-
-TEST(CivilTime, FieldsConstruction) {
-  EXPECT_EQ("2015-01-02T03:04:05",
-            absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02T03:04:00",
-            absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02T03:00:00",
-            absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02T00:00:00",
-            absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01T00:00:00",
-            absl::FormatCivilTime(absl::CivilSecond(2015, 1)));
-  EXPECT_EQ("2015-01-01T00:00:00",
-            absl::FormatCivilTime(absl::CivilSecond(2015)));
-
-  EXPECT_EQ("2015-01-02T03:04",
-            absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02T03:04",
-            absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02T03:00",
-            absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02T00:00",
-            absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01T00:00",
-            absl::FormatCivilTime(absl::CivilMinute(2015, 1)));
-  EXPECT_EQ("2015-01-01T00:00",
-            absl::FormatCivilTime(absl::CivilMinute(2015)));
-
-  EXPECT_EQ("2015-01-02T03",
-            absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02T03",
-            absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02T03",
-            absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02T00",
-            absl::FormatCivilTime(absl::CivilHour(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01T00",
-            absl::FormatCivilTime(absl::CivilHour(2015, 1)));
-  EXPECT_EQ("2015-01-01T00",
-            absl::FormatCivilTime(absl::CivilHour(2015)));
-
-  EXPECT_EQ("2015-01-02",
-            absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02",
-            absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02",
-            absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02",
-            absl::FormatCivilTime(absl::CivilDay(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01",
-            absl::FormatCivilTime(absl::CivilDay(2015, 1)));
-  EXPECT_EQ("2015-01-01",
-            absl::FormatCivilTime(absl::CivilDay(2015)));
-
-  EXPECT_EQ("2015-01",
-            absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01",
-            absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01",
-            absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01",
-            absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2)));
-  EXPECT_EQ("2015-01",
-            absl::FormatCivilTime(absl::CivilMonth(2015, 1)));
-  EXPECT_EQ("2015-01",
-            absl::FormatCivilTime(absl::CivilMonth(2015)));
-
-  EXPECT_EQ("2015",
-            absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015",
-            absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015",
-            absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3)));
-  EXPECT_EQ("2015",
-            absl::FormatCivilTime(absl::CivilYear(2015, 1, 2)));
-  EXPECT_EQ("2015",
-            absl::FormatCivilTime(absl::CivilYear(2015, 1)));
-  EXPECT_EQ("2015",
-            absl::FormatCivilTime(absl::CivilYear(2015)));
-}
-
-TEST(CivilTime, FieldsConstructionLimits) {
-  const int kIntMax = std::numeric_limits<int>::max();
-  EXPECT_EQ("2038-01-19T03:14:07",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, 1, 0, 0, kIntMax)));
-  EXPECT_EQ("6121-02-11T05:21:07",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, 1, 0, kIntMax, kIntMax)));
-  EXPECT_EQ("251104-11-20T12:21:07",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, 1, kIntMax, kIntMax, kIntMax)));
-  EXPECT_EQ("6130715-05-30T12:21:07",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, kIntMax, kIntMax, kIntMax, kIntMax)));
-  EXPECT_EQ("185087685-11-26T12:21:07",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, kIntMax, kIntMax, kIntMax, kIntMax, kIntMax)));
-
-  const int kIntMin = std::numeric_limits<int>::min();
-  EXPECT_EQ("1901-12-13T20:45:52",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, 1, 0, 0, kIntMin)));
-  EXPECT_EQ("-2182-11-20T18:37:52",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, 1, 0, kIntMin, kIntMin)));
-  EXPECT_EQ("-247165-02-11T10:37:52",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, 1, kIntMin, kIntMin, kIntMin)));
-  EXPECT_EQ("-6126776-08-01T10:37:52",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, 1, kIntMin, kIntMin, kIntMin, kIntMin)));
-  EXPECT_EQ("-185083747-10-31T10:37:52",
-            absl::FormatCivilTime(absl::CivilSecond(
-                1970, kIntMin, kIntMin, kIntMin, kIntMin, kIntMin)));
-}
-
-TEST(CivilTime, RangeLimits) {
-  const absl::civil_year_t kYearMax =
-      std::numeric_limits<absl::civil_year_t>::max();
-  EXPECT_EQ(absl::CivilYear(kYearMax),
-            absl::CivilYear::max());
-  EXPECT_EQ(absl::CivilMonth(kYearMax, 12),
-            absl::CivilMonth::max());
-  EXPECT_EQ(absl::CivilDay(kYearMax, 12, 31),
-            absl::CivilDay::max());
-  EXPECT_EQ(absl::CivilHour(kYearMax, 12, 31, 23),
-            absl::CivilHour::max());
-  EXPECT_EQ(absl::CivilMinute(kYearMax, 12, 31, 23, 59),
-            absl::CivilMinute::max());
-  EXPECT_EQ(absl::CivilSecond(kYearMax, 12, 31, 23, 59, 59),
-            absl::CivilSecond::max());
-
-  const absl::civil_year_t kYearMin =
-      std::numeric_limits<absl::civil_year_t>::min();
-  EXPECT_EQ(absl::CivilYear(kYearMin),
-            absl::CivilYear::min());
-  EXPECT_EQ(absl::CivilMonth(kYearMin, 1),
-            absl::CivilMonth::min());
-  EXPECT_EQ(absl::CivilDay(kYearMin, 1, 1),
-            absl::CivilDay::min());
-  EXPECT_EQ(absl::CivilHour(kYearMin, 1, 1, 0),
-            absl::CivilHour::min());
-  EXPECT_EQ(absl::CivilMinute(kYearMin, 1, 1, 0, 0),
-            absl::CivilMinute::min());
-  EXPECT_EQ(absl::CivilSecond(kYearMin, 1, 1, 0, 0, 0),
-            absl::CivilSecond::min());
-}
-
-TEST(CivilTime, ImplicitCrossAlignment) {
-  absl::CivilYear year(2015);
-  absl::CivilMonth month = year;
-  absl::CivilDay day = month;
-  absl::CivilHour hour = day;
-  absl::CivilMinute minute = hour;
-  absl::CivilSecond second = minute;
-
-  second = year;
-  EXPECT_EQ(second, year);
-  second = month;
-  EXPECT_EQ(second, month);
-  second = day;
-  EXPECT_EQ(second, day);
-  second = hour;
-  EXPECT_EQ(second, hour);
-  second = minute;
-  EXPECT_EQ(second, minute);
-
-  minute = year;
-  EXPECT_EQ(minute, year);
-  minute = month;
-  EXPECT_EQ(minute, month);
-  minute = day;
-  EXPECT_EQ(minute, day);
-  minute = hour;
-  EXPECT_EQ(minute, hour);
-
-  hour = year;
-  EXPECT_EQ(hour, year);
-  hour = month;
-  EXPECT_EQ(hour, month);
-  hour = day;
-  EXPECT_EQ(hour, day);
-
-  day = year;
-  EXPECT_EQ(day, year);
-  day = month;
-  EXPECT_EQ(day, month);
-
-  month = year;
-  EXPECT_EQ(month, year);
-
-  // Ensures unsafe conversions are not allowed.
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilSecond, absl::CivilMinute>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilSecond, absl::CivilHour>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilSecond, absl::CivilDay>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilSecond, absl::CivilMonth>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilSecond, absl::CivilYear>::value));
-
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilMinute, absl::CivilHour>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilMinute, absl::CivilDay>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilMinute, absl::CivilMonth>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilMinute, absl::CivilYear>::value));
-
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilHour, absl::CivilDay>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilHour, absl::CivilMonth>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilHour, absl::CivilYear>::value));
-
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilDay, absl::CivilMonth>::value));
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilDay, absl::CivilYear>::value));
-
-  EXPECT_FALSE(
-      (std::is_convertible<absl::CivilMonth, absl::CivilYear>::value));
-}
-
-TEST(CivilTime, ExplicitCrossAlignment) {
-  //
-  // Assign from smaller units -> larger units
-  //
-
-  absl::CivilSecond second(2015, 1, 2, 3, 4, 5);
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second));
-
-  absl::CivilMinute minute(second);
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute));
-
-  absl::CivilHour hour(minute);
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour));
-
-  absl::CivilDay day(hour);
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day));
-
-  absl::CivilMonth month(day);
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(month));
-
-  absl::CivilYear year(month);
-  EXPECT_EQ("2015", absl::FormatCivilTime(year));
-
-  //
-  // Now assign from larger units -> smaller units
-  //
-
-  month = absl::CivilMonth(year);
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(month));
-
-  day = absl::CivilDay(month);
-  EXPECT_EQ("2015-01-01", absl::FormatCivilTime(day));
-
-  hour = absl::CivilHour(day);
-  EXPECT_EQ("2015-01-01T00", absl::FormatCivilTime(hour));
-
-  minute = absl::CivilMinute(hour);
-  EXPECT_EQ("2015-01-01T00:00", absl::FormatCivilTime(minute));
-
-  second = absl::CivilSecond(minute);
-  EXPECT_EQ("2015-01-01T00:00:00", absl::FormatCivilTime(second));
-}
-
-// Metafunction to test whether difference is allowed between two types.
-template <typename T1, typename T2>
-struct HasDiff {
-  template <typename U1, typename U2>
-  static std::false_type test(...);
-  template <typename U1, typename U2>
-  static std::true_type test(decltype(std::declval<U1>() - std::declval<U2>()));
-  static constexpr bool value = decltype(test<T1, T2>(0))::value;
-};
-
-TEST(CivilTime, DisallowCrossAlignedDifference) {
-  // Difference is allowed between types with the same alignment.
-  static_assert(HasDiff<absl::CivilSecond, absl::CivilSecond>::value, "");
-  static_assert(HasDiff<absl::CivilMinute, absl::CivilMinute>::value, "");
-  static_assert(HasDiff<absl::CivilHour, absl::CivilHour>::value, "");
-  static_assert(HasDiff<absl::CivilDay, absl::CivilDay>::value, "");
-  static_assert(HasDiff<absl::CivilMonth, absl::CivilMonth>::value, "");
-  static_assert(HasDiff<absl::CivilYear, absl::CivilYear>::value, "");
-
-  // Difference is disallowed between types with different alignments.
-  static_assert(!HasDiff<absl::CivilSecond, absl::CivilMinute>::value, "");
-  static_assert(!HasDiff<absl::CivilSecond, absl::CivilHour>::value, "");
-  static_assert(!HasDiff<absl::CivilSecond, absl::CivilDay>::value, "");
-  static_assert(!HasDiff<absl::CivilSecond, absl::CivilMonth>::value, "");
-  static_assert(!HasDiff<absl::CivilSecond, absl::CivilYear>::value, "");
-
-  static_assert(!HasDiff<absl::CivilMinute, absl::CivilHour>::value, "");
-  static_assert(!HasDiff<absl::CivilMinute, absl::CivilDay>::value, "");
-  static_assert(!HasDiff<absl::CivilMinute, absl::CivilMonth>::value, "");
-  static_assert(!HasDiff<absl::CivilMinute, absl::CivilYear>::value, "");
-
-  static_assert(!HasDiff<absl::CivilHour, absl::CivilDay>::value, "");
-  static_assert(!HasDiff<absl::CivilHour, absl::CivilMonth>::value, "");
-  static_assert(!HasDiff<absl::CivilHour, absl::CivilYear>::value, "");
-
-  static_assert(!HasDiff<absl::CivilDay, absl::CivilMonth>::value, "");
-  static_assert(!HasDiff<absl::CivilDay, absl::CivilYear>::value, "");
-
-  static_assert(!HasDiff<absl::CivilMonth, absl::CivilYear>::value, "");
-}
-
-TEST(CivilTime, ValueSemantics) {
-  const absl::CivilHour a(2015, 1, 2, 3);
-  const absl::CivilHour b = a;
-  const absl::CivilHour c(b);
-  absl::CivilHour d;
-  d = c;
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(d));
-}
-
-TEST(CivilTime, Relational) {
-  // Tests that the alignment unit is ignored in comparison.
-  const absl::CivilYear year(2014);
-  const absl::CivilMonth month(year);
-  EXPECT_EQ(year, month);
-
-#define TEST_RELATIONAL(OLDER, YOUNGER) \
-  do {                                  \
-    EXPECT_FALSE(OLDER < OLDER);        \
-    EXPECT_FALSE(OLDER > OLDER);        \
-    EXPECT_TRUE(OLDER >= OLDER);        \
-    EXPECT_TRUE(OLDER <= OLDER);        \
-    EXPECT_FALSE(YOUNGER < YOUNGER);    \
-    EXPECT_FALSE(YOUNGER > YOUNGER);    \
-    EXPECT_TRUE(YOUNGER >= YOUNGER);    \
-    EXPECT_TRUE(YOUNGER <= YOUNGER);    \
-    EXPECT_EQ(OLDER, OLDER);            \
-    EXPECT_NE(OLDER, YOUNGER);          \
-    EXPECT_LT(OLDER, YOUNGER);          \
-    EXPECT_LE(OLDER, YOUNGER);          \
-    EXPECT_GT(YOUNGER, OLDER);          \
-    EXPECT_GE(YOUNGER, OLDER);          \
-  } while (0)
-
-  // Alignment is ignored in comparison (verified above), so CivilSecond is
-  // used to test comparison in all field positions.
-  TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
-                  absl::CivilSecond(2015, 1, 1, 0, 0, 0));
-  TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
-                  absl::CivilSecond(2014, 2, 1, 0, 0, 0));
-  TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
-                  absl::CivilSecond(2014, 1, 2, 0, 0, 0));
-  TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
-                  absl::CivilSecond(2014, 1, 1, 1, 0, 0));
-  TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 1, 0, 0),
-                  absl::CivilSecond(2014, 1, 1, 1, 1, 0));
-  TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 1, 1, 0),
-                  absl::CivilSecond(2014, 1, 1, 1, 1, 1));
-
-  // Tests the relational operators of two different civil-time types.
-  TEST_RELATIONAL(absl::CivilDay(2014, 1, 1),
-                  absl::CivilMinute(2014, 1, 1, 1, 1));
-  TEST_RELATIONAL(absl::CivilDay(2014, 1, 1),
-                  absl::CivilMonth(2014, 2));
-
-#undef TEST_RELATIONAL
-}
-
-TEST(CivilTime, Arithmetic) {
-  absl::CivilSecond second(2015, 1, 2, 3, 4, 5);
-  EXPECT_EQ("2015-01-02T03:04:06", absl::FormatCivilTime(second += 1));
-  EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(second + 1));
-  EXPECT_EQ("2015-01-02T03:04:08", absl::FormatCivilTime(2 + second));
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second - 1));
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second -= 1));
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second++));
-  EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(++second));
-  EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(second--));
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(--second));
-
-  absl::CivilMinute minute(2015, 1, 2, 3, 4);
-  EXPECT_EQ("2015-01-02T03:05", absl::FormatCivilTime(minute += 1));
-  EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(minute + 1));
-  EXPECT_EQ("2015-01-02T03:07", absl::FormatCivilTime(2 + minute));
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute - 1));
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute -= 1));
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute++));
-  EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(++minute));
-  EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(minute--));
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(--minute));
-
-  absl::CivilHour hour(2015, 1, 2, 3);
-  EXPECT_EQ("2015-01-02T04", absl::FormatCivilTime(hour += 1));
-  EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(hour + 1));
-  EXPECT_EQ("2015-01-02T06", absl::FormatCivilTime(2 + hour));
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour - 1));
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour -= 1));
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour++));
-  EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(++hour));
-  EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(hour--));
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(--hour));
-
-  absl::CivilDay day(2015, 1, 2);
-  EXPECT_EQ("2015-01-03", absl::FormatCivilTime(day += 1));
-  EXPECT_EQ("2015-01-04", absl::FormatCivilTime(day + 1));
-  EXPECT_EQ("2015-01-05", absl::FormatCivilTime(2 + day));
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day - 1));
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day -= 1));
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day++));
-  EXPECT_EQ("2015-01-04", absl::FormatCivilTime(++day));
-  EXPECT_EQ("2015-01-04", absl::FormatCivilTime(day--));
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(--day));
-
-  absl::CivilMonth month(2015, 1);
-  EXPECT_EQ("2015-02", absl::FormatCivilTime(month += 1));
-  EXPECT_EQ("2015-03", absl::FormatCivilTime(month + 1));
-  EXPECT_EQ("2015-04", absl::FormatCivilTime(2 + month));
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(month - 1));
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(month -= 1));
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(month++));
-  EXPECT_EQ("2015-03", absl::FormatCivilTime(++month));
-  EXPECT_EQ("2015-03", absl::FormatCivilTime(month--));
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(--month));
-
-  absl::CivilYear year(2015);
-  EXPECT_EQ("2016", absl::FormatCivilTime(year += 1));
-  EXPECT_EQ("2017", absl::FormatCivilTime(year + 1));
-  EXPECT_EQ("2018", absl::FormatCivilTime(2 + year));
-  EXPECT_EQ("2015", absl::FormatCivilTime(year - 1));
-  EXPECT_EQ("2015", absl::FormatCivilTime(year -= 1));
-  EXPECT_EQ("2015", absl::FormatCivilTime(year++));
-  EXPECT_EQ("2017", absl::FormatCivilTime(++year));
-  EXPECT_EQ("2017", absl::FormatCivilTime(year--));
-  EXPECT_EQ("2015", absl::FormatCivilTime(--year));
-}
-
-TEST(CivilTime, ArithmeticLimits) {
-  const int kIntMax = std::numeric_limits<int>::max();
-  const int kIntMin = std::numeric_limits<int>::min();
-
-  absl::CivilSecond second(1970, 1, 1, 0, 0, 0);
-  second += kIntMax;
-  EXPECT_EQ("2038-01-19T03:14:07", absl::FormatCivilTime(second));
-  second -= kIntMax;
-  EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(second));
-  second += kIntMin;
-  EXPECT_EQ("1901-12-13T20:45:52", absl::FormatCivilTime(second));
-  second -= kIntMin;
-  EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(second));
-
-  absl::CivilMinute minute(1970, 1, 1, 0, 0);
-  minute += kIntMax;
-  EXPECT_EQ("6053-01-23T02:07", absl::FormatCivilTime(minute));
-  minute -= kIntMax;
-  EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(minute));
-  minute += kIntMin;
-  EXPECT_EQ("-2114-12-08T21:52", absl::FormatCivilTime(minute));
-  minute -= kIntMin;
-  EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(minute));
-
-  absl::CivilHour hour(1970, 1, 1, 0);
-  hour += kIntMax;
-  EXPECT_EQ("246953-10-09T07", absl::FormatCivilTime(hour));
-  hour -= kIntMax;
-  EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hour));
-  hour += kIntMin;
-  EXPECT_EQ("-243014-03-24T16", absl::FormatCivilTime(hour));
-  hour -= kIntMin;
-  EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hour));
-
-  absl::CivilDay day(1970, 1, 1);
-  day += kIntMax;
-  EXPECT_EQ("5881580-07-11", absl::FormatCivilTime(day));
-  day -= kIntMax;
-  EXPECT_EQ("1970-01-01", absl::FormatCivilTime(day));
-  day += kIntMin;
-  EXPECT_EQ("-5877641-06-23", absl::FormatCivilTime(day));
-  day -= kIntMin;
-  EXPECT_EQ("1970-01-01", absl::FormatCivilTime(day));
-
-  absl::CivilMonth month(1970, 1);
-  month += kIntMax;
-  EXPECT_EQ("178958940-08", absl::FormatCivilTime(month));
-  month -= kIntMax;
-  EXPECT_EQ("1970-01", absl::FormatCivilTime(month));
-  month += kIntMin;
-  EXPECT_EQ("-178955001-05", absl::FormatCivilTime(month));
-  month -= kIntMin;
-  EXPECT_EQ("1970-01", absl::FormatCivilTime(month));
-
-  absl::CivilYear year(0);
-  year += kIntMax;
-  EXPECT_EQ("2147483647", absl::FormatCivilTime(year));
-  year -= kIntMax;
-  EXPECT_EQ("0", absl::FormatCivilTime(year));
-  year += kIntMin;
-  EXPECT_EQ("-2147483648", absl::FormatCivilTime(year));
-  year -= kIntMin;
-  EXPECT_EQ("0", absl::FormatCivilTime(year));
-}
-
-TEST(CivilTime, Difference) {
-  absl::CivilSecond second(2015, 1, 2, 3, 4, 5);
-  EXPECT_EQ(0, second - second);
-  EXPECT_EQ(10, (second + 10) - second);
-  EXPECT_EQ(-10, (second - 10) - second);
-
-  absl::CivilMinute minute(2015, 1, 2, 3, 4);
-  EXPECT_EQ(0, minute - minute);
-  EXPECT_EQ(10, (minute + 10) - minute);
-  EXPECT_EQ(-10, (minute - 10) - minute);
-
-  absl::CivilHour hour(2015, 1, 2, 3);
-  EXPECT_EQ(0, hour - hour);
-  EXPECT_EQ(10, (hour + 10) - hour);
-  EXPECT_EQ(-10, (hour - 10) - hour);
-
-  absl::CivilDay day(2015, 1, 2);
-  EXPECT_EQ(0, day - day);
-  EXPECT_EQ(10, (day + 10) - day);
-  EXPECT_EQ(-10, (day - 10) - day);
-
-  absl::CivilMonth month(2015, 1);
-  EXPECT_EQ(0, month - month);
-  EXPECT_EQ(10, (month + 10) - month);
-  EXPECT_EQ(-10, (month - 10) - month);
-
-  absl::CivilYear year(2015);
-  EXPECT_EQ(0, year - year);
-  EXPECT_EQ(10, (year + 10) - year);
-  EXPECT_EQ(-10, (year - 10) - year);
-}
-
-TEST(CivilTime, DifferenceLimits) {
-  const absl::civil_diff_t kDiffMax =
-      std::numeric_limits<absl::civil_diff_t>::max();
-  const absl::civil_diff_t kDiffMin =
-      std::numeric_limits<absl::civil_diff_t>::min();
-
-  // Check day arithmetic at the end of the year range.
-  const absl::CivilDay max_day(kDiffMax, 12, 31);
-  EXPECT_EQ(1, max_day - (max_day - 1));
-  EXPECT_EQ(-1, (max_day - 1) - max_day);
-
-  // Check day arithmetic at the start of the year range.
-  const absl::CivilDay min_day(kDiffMin, 1, 1);
-  EXPECT_EQ(1, (min_day + 1) - min_day);
-  EXPECT_EQ(-1, min_day - (min_day + 1));
-
-  // Check the limits of the return value.
-  const absl::CivilDay d1(1970, 1, 1);
-  const absl::CivilDay d2(25252734927768524, 7, 27);
-  EXPECT_EQ(kDiffMax, d2 - d1);
-  EXPECT_EQ(kDiffMin, d1 - (d2 + 1));
-}
-
-TEST(CivilTime, Properties) {
-  absl::CivilSecond ss(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, ss.year());
-  EXPECT_EQ(2, ss.month());
-  EXPECT_EQ(3, ss.day());
-  EXPECT_EQ(4, ss.hour());
-  EXPECT_EQ(5, ss.minute());
-  EXPECT_EQ(6, ss.second());
-  EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(ss));
-  EXPECT_EQ(34, absl::GetYearDay(ss));
-
-  absl::CivilMinute mm(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, mm.year());
-  EXPECT_EQ(2, mm.month());
-  EXPECT_EQ(3, mm.day());
-  EXPECT_EQ(4, mm.hour());
-  EXPECT_EQ(5, mm.minute());
-  EXPECT_EQ(0, mm.second());
-  EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(mm));
-  EXPECT_EQ(34, absl::GetYearDay(mm));
-
-  absl::CivilHour hh(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, hh.year());
-  EXPECT_EQ(2, hh.month());
-  EXPECT_EQ(3, hh.day());
-  EXPECT_EQ(4, hh.hour());
-  EXPECT_EQ(0, hh.minute());
-  EXPECT_EQ(0, hh.second());
-  EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(hh));
-  EXPECT_EQ(34, absl::GetYearDay(hh));
-
-  absl::CivilDay d(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, d.year());
-  EXPECT_EQ(2, d.month());
-  EXPECT_EQ(3, d.day());
-  EXPECT_EQ(0, d.hour());
-  EXPECT_EQ(0, d.minute());
-  EXPECT_EQ(0, d.second());
-  EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(d));
-  EXPECT_EQ(34, absl::GetYearDay(d));
-
-  absl::CivilMonth m(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, m.year());
-  EXPECT_EQ(2, m.month());
-  EXPECT_EQ(1, m.day());
-  EXPECT_EQ(0, m.hour());
-  EXPECT_EQ(0, m.minute());
-  EXPECT_EQ(0, m.second());
-  EXPECT_EQ(absl::Weekday::sunday, absl::GetWeekday(m));
-  EXPECT_EQ(32, absl::GetYearDay(m));
-
-  absl::CivilYear y(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, y.year());
-  EXPECT_EQ(1, y.month());
-  EXPECT_EQ(1, y.day());
-  EXPECT_EQ(0, y.hour());
-  EXPECT_EQ(0, y.minute());
-  EXPECT_EQ(0, y.second());
-  EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(y));
-  EXPECT_EQ(1, absl::GetYearDay(y));
-}
-
-TEST(CivilTime, Format) {
-  absl::CivilSecond ss;
-  EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss));
-
-  absl::CivilMinute mm;
-  EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm));
-
-  absl::CivilHour hh;
-  EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh));
-
-  absl::CivilDay d;
-  EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d));
-
-  absl::CivilMonth m;
-  EXPECT_EQ("1970-01", absl::FormatCivilTime(m));
-
-  absl::CivilYear y;
-  EXPECT_EQ("1970", absl::FormatCivilTime(y));
-}
-
-TEST(CivilTime, Parse) {
-  absl::CivilSecond ss;
-  absl::CivilMinute mm;
-  absl::CivilHour hh;
-  absl::CivilDay d;
-  absl::CivilMonth m;
-  absl::CivilYear y;
-
-  // CivilSecond OK; others fail
-  EXPECT_TRUE(absl::ParseCivilTime("2015-01-02T03:04:05", &ss));
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(ss));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &mm));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &hh));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &d));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &m));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &y));
-
-  // CivilMinute OK; others fail
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &ss));
-  EXPECT_TRUE(absl::ParseCivilTime("2015-01-02T03:04", &mm));
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(mm));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &hh));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &d));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &m));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &y));
-
-  // CivilHour OK; others fail
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &ss));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &mm));
-  EXPECT_TRUE(absl::ParseCivilTime("2015-01-02T03", &hh));
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hh));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &d));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &m));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &y));
-
-  // CivilDay OK; others fail
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &ss));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &mm));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &hh));
-  EXPECT_TRUE(absl::ParseCivilTime("2015-01-02", &d));
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(d));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &m));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &y));
-
-  // CivilMonth OK; others fail
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01", &ss));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01", &mm));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01", &hh));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01", &d));
-  EXPECT_TRUE(absl::ParseCivilTime("2015-01", &m));
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(m));
-  EXPECT_FALSE(absl::ParseCivilTime("2015-01", &y));
-
-  // CivilYear OK; others fail
-  EXPECT_FALSE(absl::ParseCivilTime("2015", &ss));
-  EXPECT_FALSE(absl::ParseCivilTime("2015", &mm));
-  EXPECT_FALSE(absl::ParseCivilTime("2015", &hh));
-  EXPECT_FALSE(absl::ParseCivilTime("2015", &d));
-  EXPECT_FALSE(absl::ParseCivilTime("2015", &m));
-  EXPECT_TRUE(absl::ParseCivilTime("2015", &y));
-  EXPECT_EQ("2015", absl::FormatCivilTime(y));
-}
-
-TEST(CivilTime, FormatAndParseLenient) {
-  absl::CivilSecond ss;
-  EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss));
-
-  absl::CivilMinute mm;
-  EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm));
-
-  absl::CivilHour hh;
-  EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh));
-
-  absl::CivilDay d;
-  EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d));
-
-  absl::CivilMonth m;
-  EXPECT_EQ("1970-01", absl::FormatCivilTime(m));
-
-  absl::CivilYear y;
-  EXPECT_EQ("1970", absl::FormatCivilTime(y));
-
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &ss));
-  EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(ss));
-
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &mm));
-  EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(mm));
-
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &hh));
-  EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hh));
-
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &d));
-  EXPECT_EQ("2015-01-02", absl::FormatCivilTime(d));
-
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &m));
-  EXPECT_EQ("2015-01", absl::FormatCivilTime(m));
-
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &y));
-  EXPECT_EQ("2015", absl::FormatCivilTime(y));
-}
-
-TEST(CivilTime, ParseEdgeCases) {
-  absl::CivilSecond ss;
-  EXPECT_TRUE(
-      absl::ParseLenientCivilTime("9223372036854775807-12-31T23:59:59", &ss));
-  EXPECT_EQ("9223372036854775807-12-31T23:59:59", absl::FormatCivilTime(ss));
-  EXPECT_TRUE(
-      absl::ParseLenientCivilTime("-9223372036854775808-01-01T00:00:00", &ss));
-  EXPECT_EQ("-9223372036854775808-01-01T00:00:00", absl::FormatCivilTime(ss));
-
-  absl::CivilMinute mm;
-  EXPECT_TRUE(
-      absl::ParseLenientCivilTime("9223372036854775807-12-31T23:59", &mm));
-  EXPECT_EQ("9223372036854775807-12-31T23:59", absl::FormatCivilTime(mm));
-  EXPECT_TRUE(
-      absl::ParseLenientCivilTime("-9223372036854775808-01-01T00:00", &mm));
-  EXPECT_EQ("-9223372036854775808-01-01T00:00", absl::FormatCivilTime(mm));
-
-  absl::CivilHour hh;
-  EXPECT_TRUE(
-      absl::ParseLenientCivilTime("9223372036854775807-12-31T23", &hh));
-  EXPECT_EQ("9223372036854775807-12-31T23", absl::FormatCivilTime(hh));
-  EXPECT_TRUE(
-      absl::ParseLenientCivilTime("-9223372036854775808-01-01T00", &hh));
-  EXPECT_EQ("-9223372036854775808-01-01T00", absl::FormatCivilTime(hh));
-
-  absl::CivilDay d;
-  EXPECT_TRUE(absl::ParseLenientCivilTime("9223372036854775807-12-31", &d));
-  EXPECT_EQ("9223372036854775807-12-31", absl::FormatCivilTime(d));
-  EXPECT_TRUE(absl::ParseLenientCivilTime("-9223372036854775808-01-01", &d));
-  EXPECT_EQ("-9223372036854775808-01-01", absl::FormatCivilTime(d));
-
-  absl::CivilMonth m;
-  EXPECT_TRUE(absl::ParseLenientCivilTime("9223372036854775807-12", &m));
-  EXPECT_EQ("9223372036854775807-12", absl::FormatCivilTime(m));
-  EXPECT_TRUE(absl::ParseLenientCivilTime("-9223372036854775808-01", &m));
-  EXPECT_EQ("-9223372036854775808-01", absl::FormatCivilTime(m));
-
-  absl::CivilYear y;
-  EXPECT_TRUE(absl::ParseLenientCivilTime("9223372036854775807", &y));
-  EXPECT_EQ("9223372036854775807", absl::FormatCivilTime(y));
-  EXPECT_TRUE(absl::ParseLenientCivilTime("-9223372036854775808", &y));
-  EXPECT_EQ("-9223372036854775808", absl::FormatCivilTime(y));
-
-  // Tests some valid, but interesting, cases
-  EXPECT_TRUE(absl::ParseLenientCivilTime("0", &ss)) << ss;
-  EXPECT_EQ(absl::CivilYear(0), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime("0-1", &ss)) << ss;
-  EXPECT_EQ(absl::CivilMonth(0, 1), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015 ", &ss)) << ss;
-  EXPECT_EQ(absl::CivilYear(2015), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015-6 ", &ss)) << ss;
-  EXPECT_EQ(absl::CivilMonth(2015, 6), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-6-7", &ss)) << ss;
-  EXPECT_EQ(absl::CivilDay(2015, 6, 7), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015-6-7 ", &ss)) << ss;
-  EXPECT_EQ(absl::CivilDay(2015, 6, 7), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime("2015-06-07T10:11:12 ", &ss)) << ss;
-  EXPECT_EQ(absl::CivilSecond(2015, 6, 7, 10, 11, 12), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015-06-07T10:11:12 ", &ss)) << ss;
-  EXPECT_EQ(absl::CivilSecond(2015, 6, 7, 10, 11, 12), ss);
-  EXPECT_TRUE(absl::ParseLenientCivilTime("-01-01", &ss)) << ss;
-  EXPECT_EQ(absl::CivilMonth(-1, 1), ss);
-
-  // Tests some invalid cases
-  EXPECT_FALSE(absl::ParseLenientCivilTime("01-01-2015", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015-", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("0xff-01", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-30T04:05:06", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-03T04:05:96", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("X2015-02-03T04:05:06", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-03T04:05:003", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015 -02-03T04:05:06", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-03-04:05:06", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("2015:02:03T04-05-06", &ss)) << ss;
-  EXPECT_FALSE(absl::ParseLenientCivilTime("9223372036854775808", &y)) << y;
-}
-
-TEST(CivilTime, OutputStream) {
-  absl::CivilSecond cs(2016, 2, 3, 4, 5, 6);
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::CivilYear(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016.................X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::CivilMonth(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02..............X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::CivilDay(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03...........X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::CivilHour(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03T04........X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::CivilMinute(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03T04:05.....X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::CivilSecond(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03T04:05:06..X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << absl::Weekday::wednesday;
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..Wednesday............X..", ss.str());
-  }
-}
-
-TEST(CivilTime, Weekday) {
-  absl::CivilDay d(1970, 1, 1);
-  EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(d)) << d;
-
-  // We used to get this wrong for years < -30.
-  d = absl::CivilDay(-31, 12, 24);
-  EXPECT_EQ(absl::Weekday::wednesday, absl::GetWeekday(d)) << d;
-}
-
-TEST(CivilTime, NextPrevWeekday) {
-  // Jan 1, 1970 was a Thursday.
-  const absl::CivilDay thursday(1970, 1, 1);
-
-  // Thursday -> Thursday
-  absl::CivilDay d = absl::NextWeekday(thursday, absl::Weekday::thursday);
-  EXPECT_EQ(7, d - thursday) << d;
-  EXPECT_EQ(d - 14, absl::PrevWeekday(thursday, absl::Weekday::thursday));
-
-  // Thursday -> Friday
-  d = absl::NextWeekday(thursday, absl::Weekday::friday);
-  EXPECT_EQ(1, d - thursday) << d;
-  EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::friday));
-
-  // Thursday -> Saturday
-  d = absl::NextWeekday(thursday, absl::Weekday::saturday);
-  EXPECT_EQ(2, d - thursday) << d;
-  EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::saturday));
-
-  // Thursday -> Sunday
-  d = absl::NextWeekday(thursday, absl::Weekday::sunday);
-  EXPECT_EQ(3, d - thursday) << d;
-  EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::sunday));
-
-  // Thursday -> Monday
-  d = absl::NextWeekday(thursday, absl::Weekday::monday);
-  EXPECT_EQ(4, d - thursday) << d;
-  EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::monday));
-
-  // Thursday -> Tuesday
-  d = absl::NextWeekday(thursday, absl::Weekday::tuesday);
-  EXPECT_EQ(5, d - thursday) << d;
-  EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::tuesday));
-
-  // Thursday -> Wednesday
-  d = absl::NextWeekday(thursday, absl::Weekday::wednesday);
-  EXPECT_EQ(6, d - thursday) << d;
-  EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::wednesday));
-}
-
-// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
-TEST(CivilTime, DifferenceWithHugeYear) {
-  absl::CivilDay d1(9223372036854775807, 1, 1);
-  absl::CivilDay d2(9223372036854775807, 12, 31);
-  EXPECT_EQ(364, d2 - d1);
-
-  d1 = absl::CivilDay(-9223372036854775807 - 1, 1, 1);
-  d2 = absl::CivilDay(-9223372036854775807 - 1, 12, 31);
-  EXPECT_EQ(365, d2 - d1);
-
-  // Check the limits of the return value at the end of the year range.
-  d1 = absl::CivilDay(9223372036854775807, 1, 1);
-  d2 = absl::CivilDay(9198119301927009252, 6, 6);
-  EXPECT_EQ(9223372036854775807, d1 - d2);
-  d2 = d2 - 1;
-  EXPECT_EQ(-9223372036854775807 - 1, d2 - d1);
-
-  // Check the limits of the return value at the start of the year range.
-  d1 = absl::CivilDay(-9223372036854775807 - 1, 1, 1);
-  d2 = absl::CivilDay(-9198119301927009254, 7, 28);
-  EXPECT_EQ(9223372036854775807, d2 - d1);
-  d2 = d2 + 1;
-  EXPECT_EQ(-9223372036854775807 - 1, d1 - d2);
-
-  // Check the limits of the return value from either side of year 0.
-  d1 = absl::CivilDay(-12626367463883278, 9, 3);
-  d2 = absl::CivilDay(12626367463883277, 3, 28);
-  EXPECT_EQ(9223372036854775807, d2 - d1);
-  d2 = d2 + 1;
-  EXPECT_EQ(-9223372036854775807 - 1, d1 - d2);
-}
-
-// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
-TEST(CivilTime, DifferenceNoIntermediateOverflow) {
-  // The difference up to the minute field would be below the minimum
-  // int64_t, but the 52 extra seconds brings us back to the minimum.
-  absl::CivilSecond s1(-292277022657, 1, 27, 8, 29 - 1, 52);
-  absl::CivilSecond s2(1970, 1, 1, 0, 0 - 1, 0);
-  EXPECT_EQ(-9223372036854775807 - 1, s1 - s2);
-
-  // The difference up to the minute field would be above the maximum
-  // int64_t, but the -53 extra seconds brings us back to the maximum.
-  s1 = absl::CivilSecond(292277026596, 12, 4, 15, 30, 7 - 7);
-  s2 = absl::CivilSecond(1970, 1, 1, 0, 0, 0 - 7);
-  EXPECT_EQ(9223372036854775807, s1 - s2);
-}
-
-TEST(CivilTime, NormalizeSimpleOverflow) {
-  absl::CivilSecond cs;
-  cs = absl::CivilSecond(2013, 11, 15, 16, 32, 59 + 1);
-  EXPECT_EQ("2013-11-15T16:33:00", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16, 59 + 1, 14);
-  EXPECT_EQ("2013-11-15T17:00:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 23 + 1, 32, 14);
-  EXPECT_EQ("2013-11-16T00:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 30 + 1, 16, 32, 14);
-  EXPECT_EQ("2013-12-01T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 12 + 1, 15, 16, 32, 14);
-  EXPECT_EQ("2014-01-15T16:32:14", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeSimpleUnderflow) {
-  absl::CivilSecond cs;
-  cs = absl::CivilSecond(2013, 11, 15, 16, 32, 0 - 1);
-  EXPECT_EQ("2013-11-15T16:31:59", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16, 0 - 1, 14);
-  EXPECT_EQ("2013-11-15T15:59:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 0 - 1, 32, 14);
-  EXPECT_EQ("2013-11-14T23:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 1 - 1, 16, 32, 14);
-  EXPECT_EQ("2013-10-31T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 1 - 1, 15, 16, 32, 14);
-  EXPECT_EQ("2012-12-15T16:32:14", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeMultipleOverflow) {
-  absl::CivilSecond cs(2013, 12, 31, 23, 59, 59 + 1);
-  EXPECT_EQ("2014-01-01T00:00:00", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeMultipleUnderflow) {
-  absl::CivilSecond cs(2014, 1, 1, 0, 0, 0 - 1);
-  EXPECT_EQ("2013-12-31T23:59:59", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeOverflowLimits) {
-  absl::CivilSecond cs;
-
-  const int kintmax = std::numeric_limits<int>::max();
-  cs = absl::CivilSecond(0, kintmax, kintmax, kintmax, kintmax, kintmax);
-  EXPECT_EQ("185085715-11-27T12:21:07", absl::FormatCivilTime(cs));
-
-  const int kintmin = std::numeric_limits<int>::min();
-  cs = absl::CivilSecond(0, kintmin, kintmin, kintmin, kintmin, kintmin);
-  EXPECT_EQ("-185085717-10-31T10:37:52", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeComplexOverflow) {
-  absl::CivilSecond cs;
-  cs = absl::CivilSecond(2013, 11, 15, 16, 32, 14 + 123456789);
-  EXPECT_EQ("2017-10-14T14:05:23", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16, 32 + 1234567, 14);
-  EXPECT_EQ("2016-03-22T00:39:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16 + 123456, 32, 14);
-  EXPECT_EQ("2027-12-16T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15 + 1234, 16, 32, 14);
-  EXPECT_EQ("2017-04-02T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11 + 123, 15, 16, 32, 14);
-  EXPECT_EQ("2024-02-15T16:32:14", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeComplexUnderflow) {
-  absl::CivilSecond cs;
-  cs = absl::CivilSecond(1999, 3, 0, 0, 0, 0);  // year 400
-  EXPECT_EQ("1999-02-28T00:00:00", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16, 32, 14 - 123456789);
-  EXPECT_EQ("2009-12-17T18:59:05", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16, 32 - 1234567, 14);
-  EXPECT_EQ("2011-07-12T08:25:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15, 16 - 123456, 32, 14);
-  EXPECT_EQ("1999-10-16T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11, 15 - 1234, 16, 32, 14);
-  EXPECT_EQ("2010-06-30T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11 - 123, 15, 16, 32, 14);
-  EXPECT_EQ("2003-08-15T16:32:14", absl::FormatCivilTime(cs));
-}
-
-TEST(CivilTime, NormalizeMishmash) {
-  absl::CivilSecond cs;
-  cs = absl::CivilSecond(2013, 11 - 123, 15 + 1234, 16 - 123456, 32 + 1234567,
-                         14 - 123456789);
-  EXPECT_EQ("1991-05-09T03:06:05", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11 + 123, 15 - 1234, 16 + 123456, 32 - 1234567,
-                         14 + 123456789);
-  EXPECT_EQ("2036-05-24T05:58:23", absl::FormatCivilTime(cs));
-
-  cs = absl::CivilSecond(2013, 11, -146097 + 1, 16, 32, 14);
-  EXPECT_EQ("1613-11-01T16:32:14", absl::FormatCivilTime(cs));
-  cs = absl::CivilSecond(2013, 11 + 400 * 12, -146097 + 1, 16, 32, 14);
-  EXPECT_EQ("2013-11-01T16:32:14", absl::FormatCivilTime(cs));
-}
-
-// Convert all the days from 1970-1-1 to 1970-1-146097 (aka 2369-12-31)
-// and check that they normalize to the expected time.  146097 days span
-// the 400-year Gregorian cycle used during normalization.
-TEST(CivilTime, NormalizeAllTheDays) {
-  absl::CivilDay expected(1970, 1, 1);
-  for (int day = 1; day <= 146097; ++day) {
-    absl::CivilSecond cs(1970, 1, day, 0, 0, 0);
-    EXPECT_EQ(expected, cs);
-    ++expected;
-  }
-}
-
-TEST(CivilTime, NormalizeWithHugeYear) {
-  absl::CivilMonth c(9223372036854775807, 1);
-  EXPECT_EQ("9223372036854775807-01", absl::FormatCivilTime(c));
-  c = c - 1;  // Causes normalization
-  EXPECT_EQ("9223372036854775806-12", absl::FormatCivilTime(c));
-
-  c = absl::CivilMonth(-9223372036854775807 - 1, 1);
-  EXPECT_EQ("-9223372036854775808-01", absl::FormatCivilTime(c));
-  c = c + 12;  // Causes normalization
-  EXPECT_EQ("-9223372036854775807-01", absl::FormatCivilTime(c));
-}
-
-TEST(CivilTime, LeapYears) {
-  const absl::CivilSecond s1(2013, 2, 28 + 1, 0, 0, 0);
-  EXPECT_EQ("2013-03-01T00:00:00", absl::FormatCivilTime(s1));
-
-  const absl::CivilSecond s2(2012, 2, 28 + 1, 0, 0, 0);
-  EXPECT_EQ("2012-02-29T00:00:00", absl::FormatCivilTime(s2));
-
-  const absl::CivilSecond s3(1900, 2, 28 + 1, 0, 0, 0);
-  EXPECT_EQ("1900-03-01T00:00:00", absl::FormatCivilTime(s3));
-
-  const struct {
-    int year;
-    int days;
-    struct {
-      int month;
-      int day;
-    } leap_day;  // The date of the day after Feb 28.
-  } kLeapYearTable[]{
-      {1900, 365, {3, 1}},
-      {1999, 365, {3, 1}},
-      {2000, 366, {2, 29}},  // leap year
-      {2001, 365, {3, 1}},
-      {2002, 365, {3, 1}},
-      {2003, 365, {3, 1}},
-      {2004, 366, {2, 29}},  // leap year
-      {2005, 365, {3, 1}},
-      {2006, 365, {3, 1}},
-      {2007, 365, {3, 1}},
-      {2008, 366, {2, 29}},  // leap year
-      {2009, 365, {3, 1}},
-      {2100, 365, {3, 1}},
-  };
-
-  for (int i = 0; i < ABSL_ARRAYSIZE(kLeapYearTable); ++i) {
-    const int y = kLeapYearTable[i].year;
-    const int m = kLeapYearTable[i].leap_day.month;
-    const int d = kLeapYearTable[i].leap_day.day;
-    const int n = kLeapYearTable[i].days;
-
-    // Tests incrementing through the leap day.
-    const absl::CivilDay feb28(y, 2, 28);
-    const absl::CivilDay next_day = feb28 + 1;
-    EXPECT_EQ(m, next_day.month());
-    EXPECT_EQ(d, next_day.day());
-
-    // Tests difference in days of leap years.
-    const absl::CivilYear year(feb28);
-    const absl::CivilYear next_year = year + 1;
-    EXPECT_EQ(n, absl::CivilDay(next_year) - absl::CivilDay(year));
-  }
-}
-
-TEST(CivilTime, FirstThursdayInMonth) {
-  const absl::CivilDay nov1(2014, 11, 1);
-  const absl::CivilDay thursday =
-      absl::NextWeekday(nov1 - 1, absl::Weekday::thursday);
-  EXPECT_EQ("2014-11-06", absl::FormatCivilTime(thursday));
-
-  // Bonus: Date of Thanksgiving in the United States
-  // Rule: Fourth Thursday of November
-  const absl::CivilDay thanksgiving = thursday +  7 * 3;
-  EXPECT_EQ("2014-11-27", absl::FormatCivilTime(thanksgiving));
-}
-
-TEST(CivilTime, DocumentationExample) {
-  absl::CivilSecond second(2015, 6, 28, 1, 2, 3);  // 2015-06-28 01:02:03
-  absl::CivilMinute minute(second);                // 2015-06-28 01:02:00
-  absl::CivilDay day(minute);                      // 2015-06-28 00:00:00
-
-  second -= 1;                    // 2015-06-28 01:02:02
-  --second;                       // 2015-06-28 01:02:01
-  EXPECT_EQ(minute, second - 1);  // Comparison between types
-  EXPECT_LT(minute, second);
-
-  // int diff = second - minute;  // ERROR: Mixed types, won't compile
-
-  absl::CivilDay june_1(2015, 6, 1);  // Pass fields to c'tor.
-  int diff = day - june_1;            // Num days between 'day' and June 1
-  EXPECT_EQ(27, diff);
-
-  // Fields smaller than alignment are floored to their minimum value.
-  absl::CivilDay day_floor(2015, 1, 2, 9, 9, 9);
-  EXPECT_EQ(0, day_floor.hour());  // 09:09:09 is floored
-  EXPECT_EQ(absl::CivilDay(2015, 1, 2), day_floor);
-
-  // Unspecified fields default to their minium value
-  absl::CivilDay day_default(2015);  // Defaults to Jan 1
-  EXPECT_EQ(absl::CivilDay(2015, 1, 1), day_default);
-
-  // Iterates all the days of June.
-  absl::CivilMonth june(day);  // CivilDay -> CivilMonth
-  absl::CivilMonth july = june + 1;
-  for (absl::CivilDay day = june_1; day < july; ++day) {
-    // ...
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/clock.cc b/third_party/abseil/absl/time/clock.cc
deleted file mode 100644
index 6862e01..0000000
--- a/third_party/abseil/absl/time/clock.cc
+++ /dev/null
@@ -1,567 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/clock.h"
-
-#include "absl/base/attributes.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <cerrno>
-#include <cstdint>
-#include <ctime>
-#include <limits>
-
-#include "absl/base/internal/spinlock.h"
-#include "absl/base/internal/unscaledcycleclock.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/base/thread_annotations.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-Time Now() {
-  // TODO(bww): Get a timespec instead so we don't have to divide.
-  int64_t n = absl::GetCurrentTimeNanos();
-  if (n >= 0) {
-    return time_internal::FromUnixDuration(
-        time_internal::MakeDuration(n / 1000000000, n % 1000000000 * 4));
-  }
-  return time_internal::FromUnixDuration(absl::Nanoseconds(n));
-}
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// Decide if we should use the fast GetCurrentTimeNanos() algorithm
-// based on the cyclecounter, otherwise just get the time directly
-// from the OS on every call. This can be chosen at compile-time via
-// -DABSL_USE_CYCLECLOCK_FOR_GET_CURRENT_TIME_NANOS=[0|1]
-#ifndef ABSL_USE_CYCLECLOCK_FOR_GET_CURRENT_TIME_NANOS
-#if ABSL_USE_UNSCALED_CYCLECLOCK
-#define ABSL_USE_CYCLECLOCK_FOR_GET_CURRENT_TIME_NANOS 1
-#else
-#define ABSL_USE_CYCLECLOCK_FOR_GET_CURRENT_TIME_NANOS 0
-#endif
-#endif
-
-#if defined(__APPLE__) || defined(_WIN32)
-#include "absl/time/internal/get_current_time_chrono.inc"
-#else
-#include "absl/time/internal/get_current_time_posix.inc"
-#endif
-
-// Allows override by test.
-#ifndef GET_CURRENT_TIME_NANOS_FROM_SYSTEM
-#define GET_CURRENT_TIME_NANOS_FROM_SYSTEM() \
-  ::absl::time_internal::GetCurrentTimeNanosFromSystem()
-#endif
-
-#if !ABSL_USE_CYCLECLOCK_FOR_GET_CURRENT_TIME_NANOS
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-int64_t GetCurrentTimeNanos() { return GET_CURRENT_TIME_NANOS_FROM_SYSTEM(); }
-ABSL_NAMESPACE_END
-}  // namespace absl
-#else  // Use the cyclecounter-based implementation below.
-
-// Allows override by test.
-#ifndef GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW
-#define GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW() \
-  ::absl::time_internal::UnscaledCycleClockWrapperForGetCurrentTime::Now()
-#endif
-
-// The following counters are used only by the test code.
-static int64_t stats_initializations;
-static int64_t stats_reinitializations;
-static int64_t stats_calibrations;
-static int64_t stats_slow_paths;
-static int64_t stats_fast_slow_paths;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-// This is a friend wrapper around UnscaledCycleClock::Now()
-// (needed to access UnscaledCycleClock).
-class UnscaledCycleClockWrapperForGetCurrentTime {
- public:
-  static int64_t Now() { return base_internal::UnscaledCycleClock::Now(); }
-};
-}  // namespace time_internal
-
-// uint64_t is used in this module to provide an extra bit in multiplications
-
-// Return the time in ns as told by the kernel interface.  Place in *cycleclock
-// the value of the cycleclock at about the time of the syscall.
-// This call represents the time base that this module synchronizes to.
-// Ensures that *cycleclock does not step back by up to (1 << 16) from
-// last_cycleclock, to discard small backward counter steps.  (Larger steps are
-// assumed to be complete resyncs, which shouldn't happen.  If they do, a full
-// reinitialization of the outer algorithm should occur.)
-static int64_t GetCurrentTimeNanosFromKernel(uint64_t last_cycleclock,
-                                             uint64_t *cycleclock) {
-  // We try to read clock values at about the same time as the kernel clock.
-  // This value gets adjusted up or down as estimate of how long that should
-  // take, so we can reject attempts that take unusually long.
-  static std::atomic<uint64_t> approx_syscall_time_in_cycles{10 * 1000};
-
-  uint64_t local_approx_syscall_time_in_cycles =  // local copy
-      approx_syscall_time_in_cycles.load(std::memory_order_relaxed);
-
-  int64_t current_time_nanos_from_system;
-  uint64_t before_cycles;
-  uint64_t after_cycles;
-  uint64_t elapsed_cycles;
-  int loops = 0;
-  do {
-    before_cycles = GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW();
-    current_time_nanos_from_system = GET_CURRENT_TIME_NANOS_FROM_SYSTEM();
-    after_cycles = GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW();
-    // elapsed_cycles is unsigned, so is large on overflow
-    elapsed_cycles = after_cycles - before_cycles;
-    if (elapsed_cycles >= local_approx_syscall_time_in_cycles &&
-        ++loops == 20) {  // clock changed frequencies?  Back off.
-      loops = 0;
-      if (local_approx_syscall_time_in_cycles < 1000 * 1000) {
-        local_approx_syscall_time_in_cycles =
-            (local_approx_syscall_time_in_cycles + 1) << 1;
-      }
-      approx_syscall_time_in_cycles.store(
-          local_approx_syscall_time_in_cycles,
-          std::memory_order_relaxed);
-    }
-  } while (elapsed_cycles >= local_approx_syscall_time_in_cycles ||
-           last_cycleclock - after_cycles < (static_cast<uint64_t>(1) << 16));
-
-  // Number of times in a row we've seen a kernel time call take substantially
-  // less than approx_syscall_time_in_cycles.
-  static std::atomic<uint32_t> seen_smaller{ 0 };
-
-  // Adjust approx_syscall_time_in_cycles to be within a factor of 2
-  // of the typical time to execute one iteration of the loop above.
-  if ((local_approx_syscall_time_in_cycles >> 1) < elapsed_cycles) {
-    // measured time is no smaller than half current approximation
-    seen_smaller.store(0, std::memory_order_relaxed);
-  } else if (seen_smaller.fetch_add(1, std::memory_order_relaxed) >= 3) {
-    // smaller delays several times in a row; reduce approximation by 12.5%
-    const uint64_t new_approximation =
-        local_approx_syscall_time_in_cycles -
-        (local_approx_syscall_time_in_cycles >> 3);
-    approx_syscall_time_in_cycles.store(new_approximation,
-                                        std::memory_order_relaxed);
-    seen_smaller.store(0, std::memory_order_relaxed);
-  }
-
-  *cycleclock = after_cycles;
-  return current_time_nanos_from_system;
-}
-
-
-// ---------------------------------------------------------------------
-// An implementation of reader-write locks that use no atomic ops in the read
-// case.  This is a generalization of Lamport's method for reading a multiword
-// clock.  Increment a word on each write acquisition, using the low-order bit
-// as a spinlock; the word is the high word of the "clock".  Readers read the
-// high word, then all other data, then the high word again, and repeat the
-// read if the reads of the high words yields different answers, or an odd
-// value (either case suggests possible interference from a writer).
-// Here we use a spinlock to ensure only one writer at a time, rather than
-// spinning on the bottom bit of the word to benefit from SpinLock
-// spin-delay tuning.
-
-// Acquire seqlock (*seq) and return the value to be written to unlock.
-static inline uint64_t SeqAcquire(std::atomic<uint64_t> *seq) {
-  uint64_t x = seq->fetch_add(1, std::memory_order_relaxed);
-
-  // We put a release fence between update to *seq and writes to shared data.
-  // Thus all stores to shared data are effectively release operations and
-  // update to *seq above cannot be re-ordered past any of them.  Note that
-  // this barrier is not for the fetch_add above.  A release barrier for the
-  // fetch_add would be before it, not after.
-  std::atomic_thread_fence(std::memory_order_release);
-
-  return x + 2;   // original word plus 2
-}
-
-// Release seqlock (*seq) by writing x to it---a value previously returned by
-// SeqAcquire.
-static inline void SeqRelease(std::atomic<uint64_t> *seq, uint64_t x) {
-  // The unlock store to *seq must have release ordering so that all
-  // updates to shared data must finish before this store.
-  seq->store(x, std::memory_order_release);  // release lock for readers
-}
-
-// ---------------------------------------------------------------------
-
-// "nsscaled" is unit of time equal to a (2**kScale)th of a nanosecond.
-enum { kScale = 30 };
-
-// The minimum interval between samples of the time base.
-// We pick enough time to amortize the cost of the sample,
-// to get a reasonably accurate cycle counter rate reading,
-// and not so much that calculations will overflow 64-bits.
-static const uint64_t kMinNSBetweenSamples = 2000 << 20;
-
-// We require that kMinNSBetweenSamples shifted by kScale
-// have at least a bit left over for 64-bit calculations.
-static_assert(((kMinNSBetweenSamples << (kScale + 1)) >> (kScale + 1)) ==
-               kMinNSBetweenSamples,
-               "cannot represent kMaxBetweenSamplesNSScaled");
-
-// A reader-writer lock protecting the static locations below.
-// See SeqAcquire() and SeqRelease() above.
-ABSL_CONST_INIT static absl::base_internal::SpinLock lock(
-    absl::kConstInit, base_internal::SCHEDULE_KERNEL_ONLY);
-ABSL_CONST_INIT static std::atomic<uint64_t> seq(0);
-
-// data from a sample of the kernel's time value
-struct TimeSampleAtomic {
-  std::atomic<uint64_t> raw_ns;              // raw kernel time
-  std::atomic<uint64_t> base_ns;             // our estimate of time
-  std::atomic<uint64_t> base_cycles;         // cycle counter reading
-  std::atomic<uint64_t> nsscaled_per_cycle;  // cycle period
-  // cycles before we'll sample again (a scaled reciprocal of the period,
-  // to avoid a division on the fast path).
-  std::atomic<uint64_t> min_cycles_per_sample;
-};
-// Same again, but with non-atomic types
-struct TimeSample {
-  uint64_t raw_ns;                 // raw kernel time
-  uint64_t base_ns;                // our estimate of time
-  uint64_t base_cycles;            // cycle counter reading
-  uint64_t nsscaled_per_cycle;     // cycle period
-  uint64_t min_cycles_per_sample;  // approx cycles before next sample
-};
-
-static struct TimeSampleAtomic last_sample;   // the last sample; under seq
-
-static int64_t GetCurrentTimeNanosSlowPath() ABSL_ATTRIBUTE_COLD;
-
-// Read the contents of *atomic into *sample.
-// Each field is read atomically, but to maintain atomicity between fields,
-// the access must be done under a lock.
-static void ReadTimeSampleAtomic(const struct TimeSampleAtomic *atomic,
-                                 struct TimeSample *sample) {
-  sample->base_ns = atomic->base_ns.load(std::memory_order_relaxed);
-  sample->base_cycles = atomic->base_cycles.load(std::memory_order_relaxed);
-  sample->nsscaled_per_cycle =
-      atomic->nsscaled_per_cycle.load(std::memory_order_relaxed);
-  sample->min_cycles_per_sample =
-      atomic->min_cycles_per_sample.load(std::memory_order_relaxed);
-  sample->raw_ns = atomic->raw_ns.load(std::memory_order_relaxed);
-}
-
-// Public routine.
-// Algorithm:  We wish to compute real time from a cycle counter.  In normal
-// operation, we construct a piecewise linear approximation to the kernel time
-// source, using the cycle counter value.  The start of each line segment is at
-// the same point as the end of the last, but may have a different slope (that
-// is, a different idea of the cycle counter frequency).  Every couple of
-// seconds, the kernel time source is sampled and compared with the current
-// approximation.  A new slope is chosen that, if followed for another couple
-// of seconds, will correct the error at the current position.  The information
-// for a sample is in the "last_sample" struct.  The linear approximation is
-//   estimated_time = last_sample.base_ns +
-//     last_sample.ns_per_cycle * (counter_reading - last_sample.base_cycles)
-// (ns_per_cycle is actually stored in different units and scaled, to avoid
-// overflow).  The base_ns of the next linear approximation is the
-// estimated_time using the last approximation; the base_cycles is the cycle
-// counter value at that time; the ns_per_cycle is the number of ns per cycle
-// measured since the last sample, but adjusted so that most of the difference
-// between the estimated_time and the kernel time will be corrected by the
-// estimated time to the next sample.  In normal operation, this algorithm
-// relies on:
-// - the cycle counter and kernel time rates not changing a lot in a few
-//   seconds.
-// - the client calling into the code often compared to a couple of seconds, so
-//   the time to the next correction can be estimated.
-// Any time ns_per_cycle is not known, a major error is detected, or the
-// assumption about frequent calls is violated, the implementation returns the
-// kernel time.  It records sufficient data that a linear approximation can
-// resume a little later.
-
-int64_t GetCurrentTimeNanos() {
-  // read the data from the "last_sample" struct (but don't need raw_ns yet)
-  // The reads of "seq" and test of the values emulate a reader lock.
-  uint64_t base_ns;
-  uint64_t base_cycles;
-  uint64_t nsscaled_per_cycle;
-  uint64_t min_cycles_per_sample;
-  uint64_t seq_read0;
-  uint64_t seq_read1;
-
-  // If we have enough information to interpolate, the value returned will be
-  // derived from this cycleclock-derived time estimate.  On some platforms
-  // (POWER) the function to retrieve this value has enough complexity to
-  // contribute to register pressure - reading it early before initializing
-  // the other pieces of the calculation minimizes spill/restore instructions,
-  // minimizing icache cost.
-  uint64_t now_cycles = GET_CURRENT_TIME_NANOS_CYCLECLOCK_NOW();
-
-  // Acquire pairs with the barrier in SeqRelease - if this load sees that
-  // store, the shared-data reads necessarily see that SeqRelease's updates
-  // to the same shared data.
-  seq_read0 = seq.load(std::memory_order_acquire);
-
-  base_ns = last_sample.base_ns.load(std::memory_order_relaxed);
-  base_cycles = last_sample.base_cycles.load(std::memory_order_relaxed);
-  nsscaled_per_cycle =
-      last_sample.nsscaled_per_cycle.load(std::memory_order_relaxed);
-  min_cycles_per_sample =
-      last_sample.min_cycles_per_sample.load(std::memory_order_relaxed);
-
-  // This acquire fence pairs with the release fence in SeqAcquire.  Since it
-  // is sequenced between reads of shared data and seq_read1, the reads of
-  // shared data are effectively acquiring.
-  std::atomic_thread_fence(std::memory_order_acquire);
-
-  // The shared-data reads are effectively acquire ordered, and the
-  // shared-data writes are effectively release ordered. Therefore if our
-  // shared-data reads see any of a particular update's shared-data writes,
-  // seq_read1 is guaranteed to see that update's SeqAcquire.
-  seq_read1 = seq.load(std::memory_order_relaxed);
-
-  // Fast path.  Return if min_cycles_per_sample has not yet elapsed since the
-  // last sample, and we read a consistent sample.  The fast path activates
-  // only when min_cycles_per_sample is non-zero, which happens when we get an
-  // estimate for the cycle time.  The predicate will fail if now_cycles <
-  // base_cycles, or if some other thread is in the slow path.
-  //
-  // Since we now read now_cycles before base_ns, it is possible for now_cycles
-  // to be less than base_cycles (if we were interrupted between those loads and
-  // last_sample was updated). This is harmless, because delta_cycles will wrap
-  // and report a time much much bigger than min_cycles_per_sample. In that case
-  // we will take the slow path.
-  uint64_t delta_cycles = now_cycles - base_cycles;
-  if (seq_read0 == seq_read1 && (seq_read0 & 1) == 0 &&
-      delta_cycles < min_cycles_per_sample) {
-    return base_ns + ((delta_cycles * nsscaled_per_cycle) >> kScale);
-  }
-  return GetCurrentTimeNanosSlowPath();
-}
-
-// Return (a << kScale)/b.
-// Zero is returned if b==0.   Scaling is performed internally to
-// preserve precision without overflow.
-static uint64_t SafeDivideAndScale(uint64_t a, uint64_t b) {
-  // Find maximum safe_shift so that
-  //  0 <= safe_shift <= kScale  and  (a << safe_shift) does not overflow.
-  int safe_shift = kScale;
-  while (((a << safe_shift) >> safe_shift) != a) {
-    safe_shift--;
-  }
-  uint64_t scaled_b = b >> (kScale - safe_shift);
-  uint64_t quotient = 0;
-  if (scaled_b != 0) {
-    quotient = (a << safe_shift) / scaled_b;
-  }
-  return quotient;
-}
-
-static uint64_t UpdateLastSample(
-    uint64_t now_cycles, uint64_t now_ns, uint64_t delta_cycles,
-    const struct TimeSample *sample) ABSL_ATTRIBUTE_COLD;
-
-// The slow path of GetCurrentTimeNanos().  This is taken while gathering
-// initial samples, when enough time has elapsed since the last sample, and if
-// any other thread is writing to last_sample.
-//
-// Manually mark this 'noinline' to minimize stack frame size of the fast
-// path.  Without this, sometimes a compiler may inline this big block of code
-// into the fast path.  That causes lots of register spills and reloads that
-// are unnecessary unless the slow path is taken.
-//
-// TODO(absl-team): Remove this attribute when our compiler is smart enough
-// to do the right thing.
-ABSL_ATTRIBUTE_NOINLINE
-static int64_t GetCurrentTimeNanosSlowPath() ABSL_LOCKS_EXCLUDED(lock) {
-  // Serialize access to slow-path.  Fast-path readers are not blocked yet, and
-  // code below must not modify last_sample until the seqlock is acquired.
-  lock.Lock();
-
-  // Sample the kernel time base.  This is the definition of
-  // "now" if we take the slow path.
-  static uint64_t last_now_cycles;  // protected by lock
-  uint64_t now_cycles;
-  uint64_t now_ns = GetCurrentTimeNanosFromKernel(last_now_cycles, &now_cycles);
-  last_now_cycles = now_cycles;
-
-  uint64_t estimated_base_ns;
-
-  // ----------
-  // Read the "last_sample" values again; this time holding the write lock.
-  struct TimeSample sample;
-  ReadTimeSampleAtomic(&last_sample, &sample);
-
-  // ----------
-  // Try running the fast path again; another thread may have updated the
-  // sample between our run of the fast path and the sample we just read.
-  uint64_t delta_cycles = now_cycles - sample.base_cycles;
-  if (delta_cycles < sample.min_cycles_per_sample) {
-    // Another thread updated the sample.  This path does not take the seqlock
-    // so that blocked readers can make progress without blocking new readers.
-    estimated_base_ns = sample.base_ns +
-        ((delta_cycles * sample.nsscaled_per_cycle) >> kScale);
-    stats_fast_slow_paths++;
-  } else {
-    estimated_base_ns =
-        UpdateLastSample(now_cycles, now_ns, delta_cycles, &sample);
-  }
-
-  lock.Unlock();
-
-  return estimated_base_ns;
-}
-
-// Main part of the algorithm.  Locks out readers, updates the approximation
-// using the new sample from the kernel, and stores the result in last_sample
-// for readers.  Returns the new estimated time.
-static uint64_t UpdateLastSample(uint64_t now_cycles, uint64_t now_ns,
-                                 uint64_t delta_cycles,
-                                 const struct TimeSample *sample)
-    ABSL_EXCLUSIVE_LOCKS_REQUIRED(lock) {
-  uint64_t estimated_base_ns = now_ns;
-  uint64_t lock_value = SeqAcquire(&seq);  // acquire seqlock to block readers
-
-  // The 5s in the next if-statement limits the time for which we will trust
-  // the cycle counter and our last sample to give a reasonable result.
-  // Errors in the rate of the source clock can be multiplied by the ratio
-  // between this limit and kMinNSBetweenSamples.
-  if (sample->raw_ns == 0 ||  // no recent sample, or clock went backwards
-      sample->raw_ns + static_cast<uint64_t>(5) * 1000 * 1000 * 1000 < now_ns ||
-      now_ns < sample->raw_ns || now_cycles < sample->base_cycles) {
-    // record this sample, and forget any previously known slope.
-    last_sample.raw_ns.store(now_ns, std::memory_order_relaxed);
-    last_sample.base_ns.store(estimated_base_ns, std::memory_order_relaxed);
-    last_sample.base_cycles.store(now_cycles, std::memory_order_relaxed);
-    last_sample.nsscaled_per_cycle.store(0, std::memory_order_relaxed);
-    last_sample.min_cycles_per_sample.store(0, std::memory_order_relaxed);
-    stats_initializations++;
-  } else if (sample->raw_ns + 500 * 1000 * 1000 < now_ns &&
-             sample->base_cycles + 50 < now_cycles) {
-    // Enough time has passed to compute the cycle time.
-    if (sample->nsscaled_per_cycle != 0) {  // Have a cycle time estimate.
-      // Compute time from counter reading, but avoiding overflow
-      // delta_cycles may be larger than on the fast path.
-      uint64_t estimated_scaled_ns;
-      int s = -1;
-      do {
-        s++;
-        estimated_scaled_ns = (delta_cycles >> s) * sample->nsscaled_per_cycle;
-      } while (estimated_scaled_ns / sample->nsscaled_per_cycle !=
-               (delta_cycles >> s));
-      estimated_base_ns = sample->base_ns +
-                          (estimated_scaled_ns >> (kScale - s));
-    }
-
-    // Compute the assumed cycle time kMinNSBetweenSamples ns into the future
-    // assuming the cycle counter rate stays the same as the last interval.
-    uint64_t ns = now_ns - sample->raw_ns;
-    uint64_t measured_nsscaled_per_cycle = SafeDivideAndScale(ns, delta_cycles);
-
-    uint64_t assumed_next_sample_delta_cycles =
-        SafeDivideAndScale(kMinNSBetweenSamples, measured_nsscaled_per_cycle);
-
-    int64_t diff_ns = now_ns - estimated_base_ns;  // estimate low by this much
-
-    // We want to set nsscaled_per_cycle so that our estimate of the ns time
-    // at the assumed cycle time is the assumed ns time.
-    // That is, we want to set nsscaled_per_cycle so:
-    //  kMinNSBetweenSamples + diff_ns  ==
-    //  (assumed_next_sample_delta_cycles * nsscaled_per_cycle) >> kScale
-    // But we wish to damp oscillations, so instead correct only most
-    // of our current error, by solving:
-    //  kMinNSBetweenSamples + diff_ns - (diff_ns / 16) ==
-    //  (assumed_next_sample_delta_cycles * nsscaled_per_cycle) >> kScale
-    ns = kMinNSBetweenSamples + diff_ns - (diff_ns / 16);
-    uint64_t new_nsscaled_per_cycle =
-        SafeDivideAndScale(ns, assumed_next_sample_delta_cycles);
-    if (new_nsscaled_per_cycle != 0 &&
-        diff_ns < 100 * 1000 * 1000 && -diff_ns < 100 * 1000 * 1000) {
-      // record the cycle time measurement
-      last_sample.nsscaled_per_cycle.store(
-          new_nsscaled_per_cycle, std::memory_order_relaxed);
-      uint64_t new_min_cycles_per_sample =
-          SafeDivideAndScale(kMinNSBetweenSamples, new_nsscaled_per_cycle);
-      last_sample.min_cycles_per_sample.store(
-          new_min_cycles_per_sample, std::memory_order_relaxed);
-      stats_calibrations++;
-    } else {  // something went wrong; forget the slope
-      last_sample.nsscaled_per_cycle.store(0, std::memory_order_relaxed);
-      last_sample.min_cycles_per_sample.store(0, std::memory_order_relaxed);
-      estimated_base_ns = now_ns;
-      stats_reinitializations++;
-    }
-    last_sample.raw_ns.store(now_ns, std::memory_order_relaxed);
-    last_sample.base_ns.store(estimated_base_ns, std::memory_order_relaxed);
-    last_sample.base_cycles.store(now_cycles, std::memory_order_relaxed);
-  } else {
-    // have a sample, but no slope; waiting for enough time for a calibration
-    stats_slow_paths++;
-  }
-
-  SeqRelease(&seq, lock_value);  // release the readers
-
-  return estimated_base_ns;
-}
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_USE_CYCLECLOCK_FOR_GET_CURRENT_TIME_NANOS
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-// Returns the maximum duration that SleepOnce() can sleep for.
-constexpr absl::Duration MaxSleep() {
-#ifdef _WIN32
-  // Windows Sleep() takes unsigned long argument in milliseconds.
-  return absl::Milliseconds(
-      std::numeric_limits<unsigned long>::max());  // NOLINT(runtime/int)
-#else
-  return absl::Seconds(std::numeric_limits<time_t>::max());
-#endif
-}
-
-// Sleeps for the given duration.
-// REQUIRES: to_sleep <= MaxSleep().
-void SleepOnce(absl::Duration to_sleep) {
-#ifdef _WIN32
-  Sleep(to_sleep / absl::Milliseconds(1));
-#else
-  struct timespec sleep_time = absl::ToTimespec(to_sleep);
-  while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR) {
-    // Ignore signals and wait for the full interval to elapse.
-  }
-#endif
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-extern "C" {
-
-ABSL_ATTRIBUTE_WEAK void AbslInternalSleepFor(absl::Duration duration) {
-  while (duration > absl::ZeroDuration()) {
-    absl::Duration to_sleep = std::min(duration, absl::MaxSleep());
-    absl::SleepOnce(to_sleep);
-    duration -= to_sleep;
-  }
-}
-
-}  // extern "C"
diff --git a/third_party/abseil/absl/time/clock.h b/third_party/abseil/absl/time/clock.h
deleted file mode 100644
index 27764a9..0000000
--- a/third_party/abseil/absl/time/clock.h
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: clock.h
-// -----------------------------------------------------------------------------
-//
-// This header file contains utility functions for working with the system-wide
-// realtime clock. For descriptions of the main time abstractions used within
-// this header file, consult the time.h header file.
-#ifndef ABSL_TIME_CLOCK_H_
-#define ABSL_TIME_CLOCK_H_
-
-#include "absl/base/macros.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Now()
-//
-// Returns the current time, expressed as an `absl::Time` absolute time value.
-absl::Time Now();
-
-// GetCurrentTimeNanos()
-//
-// Returns the current time, expressed as a count of nanoseconds since the Unix
-// Epoch (https://en.wikipedia.org/wiki/Unix_time). Prefer `absl::Now()` instead
-// for all but the most performance-sensitive cases (i.e. when you are calling
-// this function hundreds of thousands of times per second).
-int64_t GetCurrentTimeNanos();
-
-// SleepFor()
-//
-// Sleeps for the specified duration, expressed as an `absl::Duration`.
-//
-// Notes:
-// * Signal interruptions will not reduce the sleep duration.
-// * Returns immediately when passed a nonpositive duration.
-void SleepFor(absl::Duration duration);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-// -----------------------------------------------------------------------------
-// Implementation Details
-// -----------------------------------------------------------------------------
-
-// In some build configurations we pass --detect-odr-violations to the
-// gold linker.  This causes it to flag weak symbol overrides as ODR
-// violations.  Because ODR only applies to C++ and not C,
-// --detect-odr-violations ignores symbols not mangled with C++ names.
-// By changing our extension points to be extern "C", we dodge this
-// check.
-extern "C" {
-void AbslInternalSleepFor(absl::Duration duration);
-}  // extern "C"
-
-inline void absl::SleepFor(absl::Duration duration) {
-  AbslInternalSleepFor(duration);
-}
-
-#endif  // ABSL_TIME_CLOCK_H_
diff --git a/third_party/abseil/absl/time/clock_benchmark.cc b/third_party/abseil/absl/time/clock_benchmark.cc
deleted file mode 100644
index c5c795e..0000000
--- a/third_party/abseil/absl/time/clock_benchmark.cc
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/clock.h"
-
-#if !defined(_WIN32)
-#include <sys/time.h>
-#else
-#include <winsock2.h>
-#endif  // _WIN32
-#include <cstdio>
-
-#include "absl/base/internal/cycleclock.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-void BM_Clock_Now_AbslTime(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Now());
-  }
-}
-BENCHMARK(BM_Clock_Now_AbslTime);
-
-void BM_Clock_Now_GetCurrentTimeNanos(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::GetCurrentTimeNanos());
-  }
-}
-BENCHMARK(BM_Clock_Now_GetCurrentTimeNanos);
-
-void BM_Clock_Now_AbslTime_ToUnixNanos(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToUnixNanos(absl::Now()));
-  }
-}
-BENCHMARK(BM_Clock_Now_AbslTime_ToUnixNanos);
-
-void BM_Clock_Now_CycleClock(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::base_internal::CycleClock::Now());
-  }
-}
-BENCHMARK(BM_Clock_Now_CycleClock);
-
-#if !defined(_WIN32)
-static void BM_Clock_Now_gettimeofday(benchmark::State& state) {
-  struct timeval tv;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(gettimeofday(&tv, nullptr));
-  }
-}
-BENCHMARK(BM_Clock_Now_gettimeofday);
-
-static void BM_Clock_Now_clock_gettime(benchmark::State& state) {
-  struct timespec ts;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(clock_gettime(CLOCK_REALTIME, &ts));
-  }
-}
-BENCHMARK(BM_Clock_Now_clock_gettime);
-#endif  // _WIN32
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/clock_test.cc b/third_party/abseil/absl/time/clock_test.cc
deleted file mode 100644
index 4bcfc6b..0000000
--- a/third_party/abseil/absl/time/clock_test.cc
+++ /dev/null
@@ -1,118 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/clock.h"
-
-#include "absl/base/config.h"
-#if defined(ABSL_HAVE_ALARM)
-#include <signal.h>
-#include <unistd.h>
-#elif defined(__linux__) || defined(__APPLE__)
-#error all known Linux and Apple targets have alarm
-#endif
-
-#include "gtest/gtest.h"
-#include "absl/time/time.h"
-
-namespace {
-
-TEST(Time, Now) {
-  const absl::Time before = absl::FromUnixNanos(absl::GetCurrentTimeNanos());
-  const absl::Time now = absl::Now();
-  const absl::Time after = absl::FromUnixNanos(absl::GetCurrentTimeNanos());
-  EXPECT_GE(now, before);
-  EXPECT_GE(after, now);
-}
-
-enum class AlarmPolicy { kWithoutAlarm, kWithAlarm };
-
-#if defined(ABSL_HAVE_ALARM)
-bool alarm_handler_invoked = false;
-
-void AlarmHandler(int signo) {
-  ASSERT_EQ(signo, SIGALRM);
-  alarm_handler_invoked = true;
-}
-#endif
-
-// Does SleepFor(d) take between lower_bound and upper_bound at least
-// once between now and (now + timeout)?  If requested (and supported),
-// add an alarm for the middle of the sleep period and expect it to fire.
-bool SleepForBounded(absl::Duration d, absl::Duration lower_bound,
-                     absl::Duration upper_bound, absl::Duration timeout,
-                     AlarmPolicy alarm_policy, int* attempts) {
-  const absl::Time deadline = absl::Now() + timeout;
-  while (absl::Now() < deadline) {
-#if defined(ABSL_HAVE_ALARM)
-    sig_t old_alarm = SIG_DFL;
-    if (alarm_policy == AlarmPolicy::kWithAlarm) {
-      alarm_handler_invoked = false;
-      old_alarm = signal(SIGALRM, AlarmHandler);
-      alarm(absl::ToInt64Seconds(d / 2));
-    }
-#else
-    EXPECT_EQ(alarm_policy, AlarmPolicy::kWithoutAlarm);
-#endif
-    ++*attempts;
-    absl::Time start = absl::Now();
-    absl::SleepFor(d);
-    absl::Duration actual = absl::Now() - start;
-#if defined(ABSL_HAVE_ALARM)
-    if (alarm_policy == AlarmPolicy::kWithAlarm) {
-      signal(SIGALRM, old_alarm);
-      if (!alarm_handler_invoked) continue;
-    }
-#endif
-    if (lower_bound <= actual && actual <= upper_bound) {
-      return true;  // yes, the SleepFor() was correctly bounded
-    }
-  }
-  return false;
-}
-
-testing::AssertionResult AssertSleepForBounded(absl::Duration d,
-                                               absl::Duration early,
-                                               absl::Duration late,
-                                               absl::Duration timeout,
-                                               AlarmPolicy alarm_policy) {
-  const absl::Duration lower_bound = d - early;
-  const absl::Duration upper_bound = d + late;
-  int attempts = 0;
-  if (SleepForBounded(d, lower_bound, upper_bound, timeout, alarm_policy,
-                      &attempts)) {
-    return testing::AssertionSuccess();
-  }
-  return testing::AssertionFailure()
-         << "SleepFor(" << d << ") did not return within [" << lower_bound
-         << ":" << upper_bound << "] in " << attempts << " attempt"
-         << (attempts == 1 ? "" : "s") << " over " << timeout
-         << (alarm_policy == AlarmPolicy::kWithAlarm ? " with" : " without")
-         << " an alarm";
-}
-
-// Tests that SleepFor() returns neither too early nor too late.
-TEST(SleepFor, Bounded) {
-  const absl::Duration d = absl::Milliseconds(2500);
-  const absl::Duration early = absl::Milliseconds(100);
-  const absl::Duration late = absl::Milliseconds(300);
-  const absl::Duration timeout = 48 * d;
-  EXPECT_TRUE(AssertSleepForBounded(d, early, late, timeout,
-                                    AlarmPolicy::kWithoutAlarm));
-#if defined(ABSL_HAVE_ALARM)
-  EXPECT_TRUE(AssertSleepForBounded(d, early, late, timeout,
-                                    AlarmPolicy::kWithAlarm));
-#endif
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/duration.cc b/third_party/abseil/absl/time/duration.cc
deleted file mode 100644
index 4443109..0000000
--- a/third_party/abseil/absl/time/duration.cc
+++ /dev/null
@@ -1,954 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// The implementation of the absl::Duration class, which is declared in
-// //absl/time.h.  This class behaves like a numeric type; it has no public
-// methods and is used only through the operators defined here.
-//
-// Implementation notes:
-//
-// An absl::Duration is represented as
-//
-//   rep_hi_ : (int64_t)  Whole seconds
-//   rep_lo_ : (uint32_t) Fractions of a second
-//
-// The seconds value (rep_hi_) may be positive or negative as appropriate.
-// The fractional seconds (rep_lo_) is always a positive offset from rep_hi_.
-// The API for Duration guarantees at least nanosecond resolution, which
-// means rep_lo_ could have a max value of 1B - 1 if it stored nanoseconds.
-// However, to utilize more of the available 32 bits of space in rep_lo_,
-// we instead store quarters of a nanosecond in rep_lo_ resulting in a max
-// value of 4B - 1.  This allows us to correctly handle calculations like
-// 0.5 nanos + 0.5 nanos = 1 nano.  The following example shows the actual
-// Duration rep using quarters of a nanosecond.
-//
-//    2.5 sec = {rep_hi_=2,  rep_lo_=2000000000}  // lo = 4 * 500000000
-//   -2.5 sec = {rep_hi_=-3, rep_lo_=2000000000}
-//
-// Infinite durations are represented as Durations with the rep_lo_ field set
-// to all 1s.
-//
-//   +InfiniteDuration:
-//     rep_hi_ : kint64max
-//     rep_lo_ : ~0U
-//
-//   -InfiniteDuration:
-//     rep_hi_ : kint64min
-//     rep_lo_ : ~0U
-//
-// Arithmetic overflows/underflows to +/- infinity and saturates.
-
-#if defined(_MSC_VER)
-#include <winsock2.h>  // for timeval
-#endif
-
-#include <algorithm>
-#include <cassert>
-#include <cctype>
-#include <cerrno>
-#include <cmath>
-#include <cstdint>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <functional>
-#include <limits>
-#include <string>
-
-#include "absl/base/casts.h"
-#include "absl/base/macros.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/string_view.h"
-#include "absl/strings/strip.h"
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-using time_internal::kTicksPerNanosecond;
-using time_internal::kTicksPerSecond;
-
-constexpr int64_t kint64max = std::numeric_limits<int64_t>::max();
-constexpr int64_t kint64min = std::numeric_limits<int64_t>::min();
-
-// Can't use std::isinfinite() because it doesn't exist on windows.
-inline bool IsFinite(double d) {
-  if (std::isnan(d)) return false;
-  return d != std::numeric_limits<double>::infinity() &&
-         d != -std::numeric_limits<double>::infinity();
-}
-
-inline bool IsValidDivisor(double d) {
-  if (std::isnan(d)) return false;
-  return d != 0.0;
-}
-
-// Can't use std::round() because it is only available in C++11.
-// Note that we ignore the possibility of floating-point over/underflow.
-template <typename Double>
-inline double Round(Double d) {
-  return d < 0 ? std::ceil(d - 0.5) : std::floor(d + 0.5);
-}
-
-// *sec may be positive or negative.  *ticks must be in the range
-// -kTicksPerSecond < *ticks < kTicksPerSecond.  If *ticks is negative it
-// will be normalized to a positive value by adjusting *sec accordingly.
-inline void NormalizeTicks(int64_t* sec, int64_t* ticks) {
-  if (*ticks < 0) {
-    --*sec;
-    *ticks += kTicksPerSecond;
-  }
-}
-
-// Makes a uint128 from the absolute value of the given scalar.
-inline uint128 MakeU128(int64_t a) {
-  uint128 u128 = 0;
-  if (a < 0) {
-    ++u128;
-    ++a;  // Makes it safe to negate 'a'
-    a = -a;
-  }
-  u128 += static_cast<uint64_t>(a);
-  return u128;
-}
-
-// Makes a uint128 count of ticks out of the absolute value of the Duration.
-inline uint128 MakeU128Ticks(Duration d) {
-  int64_t rep_hi = time_internal::GetRepHi(d);
-  uint32_t rep_lo = time_internal::GetRepLo(d);
-  if (rep_hi < 0) {
-    ++rep_hi;
-    rep_hi = -rep_hi;
-    rep_lo = kTicksPerSecond - rep_lo;
-  }
-  uint128 u128 = static_cast<uint64_t>(rep_hi);
-  u128 *= static_cast<uint64_t>(kTicksPerSecond);
-  u128 += rep_lo;
-  return u128;
-}
-
-// Breaks a uint128 of ticks into a Duration.
-inline Duration MakeDurationFromU128(uint128 u128, bool is_neg) {
-  int64_t rep_hi;
-  uint32_t rep_lo;
-  const uint64_t h64 = Uint128High64(u128);
-  const uint64_t l64 = Uint128Low64(u128);
-  if (h64 == 0) {  // fastpath
-    const uint64_t hi = l64 / kTicksPerSecond;
-    rep_hi = static_cast<int64_t>(hi);
-    rep_lo = static_cast<uint32_t>(l64 - hi * kTicksPerSecond);
-  } else {
-    // kMaxRepHi64 is the high 64 bits of (2^63 * kTicksPerSecond).
-    // Any positive tick count whose high 64 bits are >= kMaxRepHi64
-    // is not representable as a Duration.  A negative tick count can
-    // have its high 64 bits == kMaxRepHi64 but only when the low 64
-    // bits are all zero, otherwise it is not representable either.
-    const uint64_t kMaxRepHi64 = 0x77359400UL;
-    if (h64 >= kMaxRepHi64) {
-      if (is_neg && h64 == kMaxRepHi64 && l64 == 0) {
-        // Avoid trying to represent -kint64min below.
-        return time_internal::MakeDuration(kint64min);
-      }
-      return is_neg ? -InfiniteDuration() : InfiniteDuration();
-    }
-    const uint128 kTicksPerSecond128 = static_cast<uint64_t>(kTicksPerSecond);
-    const uint128 hi = u128 / kTicksPerSecond128;
-    rep_hi = static_cast<int64_t>(Uint128Low64(hi));
-    rep_lo =
-        static_cast<uint32_t>(Uint128Low64(u128 - hi * kTicksPerSecond128));
-  }
-  if (is_neg) {
-    rep_hi = -rep_hi;
-    if (rep_lo != 0) {
-      --rep_hi;
-      rep_lo = kTicksPerSecond - rep_lo;
-    }
-  }
-  return time_internal::MakeDuration(rep_hi, rep_lo);
-}
-
-// Convert between int64_t and uint64_t, preserving representation. This
-// allows us to do arithmetic in the unsigned domain, where overflow has
-// well-defined behavior. See operator+=() and operator-=().
-//
-// C99 7.20.1.1.1, as referenced by C++11 18.4.1.2, says, "The typedef
-// name intN_t designates a signed integer type with width N, no padding
-// bits, and a two's complement representation." So, we can convert to
-// and from the corresponding uint64_t value using a bit cast.
-inline uint64_t EncodeTwosComp(int64_t v) {
-  return absl::bit_cast<uint64_t>(v);
-}
-inline int64_t DecodeTwosComp(uint64_t v) { return absl::bit_cast<int64_t>(v); }
-
-// Note: The overflow detection in this function is done using greater/less *or
-// equal* because kint64max/min is too large to be represented exactly in a
-// double (which only has 53 bits of precision). In order to avoid assigning to
-// rep->hi a double value that is too large for an int64_t (and therefore is
-// undefined), we must consider computations that equal kint64max/min as a
-// double as overflow cases.
-inline bool SafeAddRepHi(double a_hi, double b_hi, Duration* d) {
-  double c = a_hi + b_hi;
-  if (c >= static_cast<double>(kint64max)) {
-    *d = InfiniteDuration();
-    return false;
-  }
-  if (c <= static_cast<double>(kint64min)) {
-    *d = -InfiniteDuration();
-    return false;
-  }
-  *d = time_internal::MakeDuration(c, time_internal::GetRepLo(*d));
-  return true;
-}
-
-// A functor that's similar to std::multiplies<T>, except this returns the max
-// T value instead of overflowing. This is only defined for uint128.
-template <typename Ignored>
-struct SafeMultiply {
-  uint128 operator()(uint128 a, uint128 b) const {
-    // b hi is always zero because it originated as an int64_t.
-    assert(Uint128High64(b) == 0);
-    // Fastpath to avoid the expensive overflow check with division.
-    if (Uint128High64(a) == 0) {
-      return (((Uint128Low64(a) | Uint128Low64(b)) >> 32) == 0)
-                 ? static_cast<uint128>(Uint128Low64(a) * Uint128Low64(b))
-                 : a * b;
-    }
-    return b == 0 ? b : (a > kuint128max / b) ? kuint128max : a * b;
-  }
-};
-
-// Scales (i.e., multiplies or divides, depending on the Operation template)
-// the Duration d by the int64_t r.
-template <template <typename> class Operation>
-inline Duration ScaleFixed(Duration d, int64_t r) {
-  const uint128 a = MakeU128Ticks(d);
-  const uint128 b = MakeU128(r);
-  const uint128 q = Operation<uint128>()(a, b);
-  const bool is_neg = (time_internal::GetRepHi(d) < 0) != (r < 0);
-  return MakeDurationFromU128(q, is_neg);
-}
-
-// Scales (i.e., multiplies or divides, depending on the Operation template)
-// the Duration d by the double r.
-template <template <typename> class Operation>
-inline Duration ScaleDouble(Duration d, double r) {
-  Operation<double> op;
-  double hi_doub = op(time_internal::GetRepHi(d), r);
-  double lo_doub = op(time_internal::GetRepLo(d), r);
-
-  double hi_int = 0;
-  double hi_frac = std::modf(hi_doub, &hi_int);
-
-  // Moves hi's fractional bits to lo.
-  lo_doub /= kTicksPerSecond;
-  lo_doub += hi_frac;
-
-  double lo_int = 0;
-  double lo_frac = std::modf(lo_doub, &lo_int);
-
-  // Rolls lo into hi if necessary.
-  int64_t lo64 = Round(lo_frac * kTicksPerSecond);
-
-  Duration ans;
-  if (!SafeAddRepHi(hi_int, lo_int, &ans)) return ans;
-  int64_t hi64 = time_internal::GetRepHi(ans);
-  if (!SafeAddRepHi(hi64, lo64 / kTicksPerSecond, &ans)) return ans;
-  hi64 = time_internal::GetRepHi(ans);
-  lo64 %= kTicksPerSecond;
-  NormalizeTicks(&hi64, &lo64);
-  return time_internal::MakeDuration(hi64, lo64);
-}
-
-// Tries to divide num by den as fast as possible by looking for common, easy
-// cases. If the division was done, the quotient is in *q and the remainder is
-// in *rem and true will be returned.
-inline bool IDivFastPath(const Duration num, const Duration den, int64_t* q,
-                         Duration* rem) {
-  // Bail if num or den is an infinity.
-  if (time_internal::IsInfiniteDuration(num) ||
-      time_internal::IsInfiniteDuration(den))
-    return false;
-
-  int64_t num_hi = time_internal::GetRepHi(num);
-  uint32_t num_lo = time_internal::GetRepLo(num);
-  int64_t den_hi = time_internal::GetRepHi(den);
-  uint32_t den_lo = time_internal::GetRepLo(den);
-
-  if (den_hi == 0 && den_lo == kTicksPerNanosecond) {
-    // Dividing by 1ns
-    if (num_hi >= 0 && num_hi < (kint64max - kTicksPerSecond) / 1000000000) {
-      *q = num_hi * 1000000000 + num_lo / kTicksPerNanosecond;
-      *rem = time_internal::MakeDuration(0, num_lo % den_lo);
-      return true;
-    }
-  } else if (den_hi == 0 && den_lo == 100 * kTicksPerNanosecond) {
-    // Dividing by 100ns (common when converting to Universal time)
-    if (num_hi >= 0 && num_hi < (kint64max - kTicksPerSecond) / 10000000) {
-      *q = num_hi * 10000000 + num_lo / (100 * kTicksPerNanosecond);
-      *rem = time_internal::MakeDuration(0, num_lo % den_lo);
-      return true;
-    }
-  } else if (den_hi == 0 && den_lo == 1000 * kTicksPerNanosecond) {
-    // Dividing by 1us
-    if (num_hi >= 0 && num_hi < (kint64max - kTicksPerSecond) / 1000000) {
-      *q = num_hi * 1000000 + num_lo / (1000 * kTicksPerNanosecond);
-      *rem = time_internal::MakeDuration(0, num_lo % den_lo);
-      return true;
-    }
-  } else if (den_hi == 0 && den_lo == 1000000 * kTicksPerNanosecond) {
-    // Dividing by 1ms
-    if (num_hi >= 0 && num_hi < (kint64max - kTicksPerSecond) / 1000) {
-      *q = num_hi * 1000 + num_lo / (1000000 * kTicksPerNanosecond);
-      *rem = time_internal::MakeDuration(0, num_lo % den_lo);
-      return true;
-    }
-  } else if (den_hi > 0 && den_lo == 0) {
-    // Dividing by positive multiple of 1s
-    if (num_hi >= 0) {
-      if (den_hi == 1) {
-        *q = num_hi;
-        *rem = time_internal::MakeDuration(0, num_lo);
-        return true;
-      }
-      *q = num_hi / den_hi;
-      *rem = time_internal::MakeDuration(num_hi % den_hi, num_lo);
-      return true;
-    }
-    if (num_lo != 0) {
-      num_hi += 1;
-    }
-    int64_t quotient = num_hi / den_hi;
-    int64_t rem_sec = num_hi % den_hi;
-    if (rem_sec > 0) {
-      rem_sec -= den_hi;
-      quotient += 1;
-    }
-    if (num_lo != 0) {
-      rem_sec -= 1;
-    }
-    *q = quotient;
-    *rem = time_internal::MakeDuration(rem_sec, num_lo);
-    return true;
-  }
-
-  return false;
-}
-
-}  // namespace
-
-namespace time_internal {
-
-// The 'satq' argument indicates whether the quotient should saturate at the
-// bounds of int64_t.  If it does saturate, the difference will spill over to
-// the remainder.  If it does not saturate, the remainder remain accurate,
-// but the returned quotient will over/underflow int64_t and should not be used.
-int64_t IDivDuration(bool satq, const Duration num, const Duration den,
-                     Duration* rem) {
-  int64_t q = 0;
-  if (IDivFastPath(num, den, &q, rem)) {
-    return q;
-  }
-
-  const bool num_neg = num < ZeroDuration();
-  const bool den_neg = den < ZeroDuration();
-  const bool quotient_neg = num_neg != den_neg;
-
-  if (time_internal::IsInfiniteDuration(num) || den == ZeroDuration()) {
-    *rem = num_neg ? -InfiniteDuration() : InfiniteDuration();
-    return quotient_neg ? kint64min : kint64max;
-  }
-  if (time_internal::IsInfiniteDuration(den)) {
-    *rem = num;
-    return 0;
-  }
-
-  const uint128 a = MakeU128Ticks(num);
-  const uint128 b = MakeU128Ticks(den);
-  uint128 quotient128 = a / b;
-
-  if (satq) {
-    // Limits the quotient to the range of int64_t.
-    if (quotient128 > uint128(static_cast<uint64_t>(kint64max))) {
-      quotient128 = quotient_neg ? uint128(static_cast<uint64_t>(kint64min))
-                                 : uint128(static_cast<uint64_t>(kint64max));
-    }
-  }
-
-  const uint128 remainder128 = a - quotient128 * b;
-  *rem = MakeDurationFromU128(remainder128, num_neg);
-
-  if (!quotient_neg || quotient128 == 0) {
-    return Uint128Low64(quotient128) & kint64max;
-  }
-  // The quotient needs to be negated, but we need to carefully handle
-  // quotient128s with the top bit on.
-  return -static_cast<int64_t>(Uint128Low64(quotient128 - 1) & kint64max) - 1;
-}
-
-}  // namespace time_internal
-
-//
-// Additive operators.
-//
-
-Duration& Duration::operator+=(Duration rhs) {
-  if (time_internal::IsInfiniteDuration(*this)) return *this;
-  if (time_internal::IsInfiniteDuration(rhs)) return *this = rhs;
-  const int64_t orig_rep_hi = rep_hi_;
-  rep_hi_ =
-      DecodeTwosComp(EncodeTwosComp(rep_hi_) + EncodeTwosComp(rhs.rep_hi_));
-  if (rep_lo_ >= kTicksPerSecond - rhs.rep_lo_) {
-    rep_hi_ = DecodeTwosComp(EncodeTwosComp(rep_hi_) + 1);
-    rep_lo_ -= kTicksPerSecond;
-  }
-  rep_lo_ += rhs.rep_lo_;
-  if (rhs.rep_hi_ < 0 ? rep_hi_ > orig_rep_hi : rep_hi_ < orig_rep_hi) {
-    return *this = rhs.rep_hi_ < 0 ? -InfiniteDuration() : InfiniteDuration();
-  }
-  return *this;
-}
-
-Duration& Duration::operator-=(Duration rhs) {
-  if (time_internal::IsInfiniteDuration(*this)) return *this;
-  if (time_internal::IsInfiniteDuration(rhs)) {
-    return *this = rhs.rep_hi_ >= 0 ? -InfiniteDuration() : InfiniteDuration();
-  }
-  const int64_t orig_rep_hi = rep_hi_;
-  rep_hi_ =
-      DecodeTwosComp(EncodeTwosComp(rep_hi_) - EncodeTwosComp(rhs.rep_hi_));
-  if (rep_lo_ < rhs.rep_lo_) {
-    rep_hi_ = DecodeTwosComp(EncodeTwosComp(rep_hi_) - 1);
-    rep_lo_ += kTicksPerSecond;
-  }
-  rep_lo_ -= rhs.rep_lo_;
-  if (rhs.rep_hi_ < 0 ? rep_hi_ < orig_rep_hi : rep_hi_ > orig_rep_hi) {
-    return *this = rhs.rep_hi_ >= 0 ? -InfiniteDuration() : InfiniteDuration();
-  }
-  return *this;
-}
-
-//
-// Multiplicative operators.
-//
-
-Duration& Duration::operator*=(int64_t r) {
-  if (time_internal::IsInfiniteDuration(*this)) {
-    const bool is_neg = (r < 0) != (rep_hi_ < 0);
-    return *this = is_neg ? -InfiniteDuration() : InfiniteDuration();
-  }
-  return *this = ScaleFixed<SafeMultiply>(*this, r);
-}
-
-Duration& Duration::operator*=(double r) {
-  if (time_internal::IsInfiniteDuration(*this) || !IsFinite(r)) {
-    const bool is_neg = (std::signbit(r) != 0) != (rep_hi_ < 0);
-    return *this = is_neg ? -InfiniteDuration() : InfiniteDuration();
-  }
-  return *this = ScaleDouble<std::multiplies>(*this, r);
-}
-
-Duration& Duration::operator/=(int64_t r) {
-  if (time_internal::IsInfiniteDuration(*this) || r == 0) {
-    const bool is_neg = (r < 0) != (rep_hi_ < 0);
-    return *this = is_neg ? -InfiniteDuration() : InfiniteDuration();
-  }
-  return *this = ScaleFixed<std::divides>(*this, r);
-}
-
-Duration& Duration::operator/=(double r) {
-  if (time_internal::IsInfiniteDuration(*this) || !IsValidDivisor(r)) {
-    const bool is_neg = (std::signbit(r) != 0) != (rep_hi_ < 0);
-    return *this = is_neg ? -InfiniteDuration() : InfiniteDuration();
-  }
-  return *this = ScaleDouble<std::divides>(*this, r);
-}
-
-Duration& Duration::operator%=(Duration rhs) {
-  time_internal::IDivDuration(false, *this, rhs, this);
-  return *this;
-}
-
-double FDivDuration(Duration num, Duration den) {
-  // Arithmetic with infinity is sticky.
-  if (time_internal::IsInfiniteDuration(num) || den == ZeroDuration()) {
-    return (num < ZeroDuration()) == (den < ZeroDuration())
-               ? std::numeric_limits<double>::infinity()
-               : -std::numeric_limits<double>::infinity();
-  }
-  if (time_internal::IsInfiniteDuration(den)) return 0.0;
-
-  double a =
-      static_cast<double>(time_internal::GetRepHi(num)) * kTicksPerSecond +
-      time_internal::GetRepLo(num);
-  double b =
-      static_cast<double>(time_internal::GetRepHi(den)) * kTicksPerSecond +
-      time_internal::GetRepLo(den);
-  return a / b;
-}
-
-//
-// Trunc/Floor/Ceil.
-//
-
-Duration Trunc(Duration d, Duration unit) {
-  return d - (d % unit);
-}
-
-Duration Floor(const Duration d, const Duration unit) {
-  const absl::Duration td = Trunc(d, unit);
-  return td <= d ? td : td - AbsDuration(unit);
-}
-
-Duration Ceil(const Duration d, const Duration unit) {
-  const absl::Duration td = Trunc(d, unit);
-  return td >= d ? td : td + AbsDuration(unit);
-}
-
-//
-// Factory functions.
-//
-
-Duration DurationFromTimespec(timespec ts) {
-  if (static_cast<uint64_t>(ts.tv_nsec) < 1000 * 1000 * 1000) {
-    int64_t ticks = ts.tv_nsec * kTicksPerNanosecond;
-    return time_internal::MakeDuration(ts.tv_sec, ticks);
-  }
-  return Seconds(ts.tv_sec) + Nanoseconds(ts.tv_nsec);
-}
-
-Duration DurationFromTimeval(timeval tv) {
-  if (static_cast<uint64_t>(tv.tv_usec) < 1000 * 1000) {
-    int64_t ticks = tv.tv_usec * 1000 * kTicksPerNanosecond;
-    return time_internal::MakeDuration(tv.tv_sec, ticks);
-  }
-  return Seconds(tv.tv_sec) + Microseconds(tv.tv_usec);
-}
-
-//
-// Conversion to other duration types.
-//
-
-int64_t ToInt64Nanoseconds(Duration d) {
-  if (time_internal::GetRepHi(d) >= 0 &&
-      time_internal::GetRepHi(d) >> 33 == 0) {
-    return (time_internal::GetRepHi(d) * 1000 * 1000 * 1000) +
-           (time_internal::GetRepLo(d) / kTicksPerNanosecond);
-  }
-  return d / Nanoseconds(1);
-}
-int64_t ToInt64Microseconds(Duration d) {
-  if (time_internal::GetRepHi(d) >= 0 &&
-      time_internal::GetRepHi(d) >> 43 == 0) {
-    return (time_internal::GetRepHi(d) * 1000 * 1000) +
-           (time_internal::GetRepLo(d) / (kTicksPerNanosecond * 1000));
-  }
-  return d / Microseconds(1);
-}
-int64_t ToInt64Milliseconds(Duration d) {
-  if (time_internal::GetRepHi(d) >= 0 &&
-      time_internal::GetRepHi(d) >> 53 == 0) {
-    return (time_internal::GetRepHi(d) * 1000) +
-           (time_internal::GetRepLo(d) / (kTicksPerNanosecond * 1000 * 1000));
-  }
-  return d / Milliseconds(1);
-}
-int64_t ToInt64Seconds(Duration d) {
-  int64_t hi = time_internal::GetRepHi(d);
-  if (time_internal::IsInfiniteDuration(d)) return hi;
-  if (hi < 0 && time_internal::GetRepLo(d) != 0) ++hi;
-  return hi;
-}
-int64_t ToInt64Minutes(Duration d) {
-  int64_t hi = time_internal::GetRepHi(d);
-  if (time_internal::IsInfiniteDuration(d)) return hi;
-  if (hi < 0 && time_internal::GetRepLo(d) != 0) ++hi;
-  return hi / 60;
-}
-int64_t ToInt64Hours(Duration d) {
-  int64_t hi = time_internal::GetRepHi(d);
-  if (time_internal::IsInfiniteDuration(d)) return hi;
-  if (hi < 0 && time_internal::GetRepLo(d) != 0) ++hi;
-  return hi / (60 * 60);
-}
-
-double ToDoubleNanoseconds(Duration d) {
-  return FDivDuration(d, Nanoseconds(1));
-}
-double ToDoubleMicroseconds(Duration d) {
-  return FDivDuration(d, Microseconds(1));
-}
-double ToDoubleMilliseconds(Duration d) {
-  return FDivDuration(d, Milliseconds(1));
-}
-double ToDoubleSeconds(Duration d) {
-  return FDivDuration(d, Seconds(1));
-}
-double ToDoubleMinutes(Duration d) {
-  return FDivDuration(d, Minutes(1));
-}
-double ToDoubleHours(Duration d) {
-  return FDivDuration(d, Hours(1));
-}
-
-timespec ToTimespec(Duration d) {
-  timespec ts;
-  if (!time_internal::IsInfiniteDuration(d)) {
-    int64_t rep_hi = time_internal::GetRepHi(d);
-    uint32_t rep_lo = time_internal::GetRepLo(d);
-    if (rep_hi < 0) {
-      // Tweak the fields so that unsigned division of rep_lo
-      // maps to truncation (towards zero) for the timespec.
-      rep_lo += kTicksPerNanosecond - 1;
-      if (rep_lo >= kTicksPerSecond) {
-        rep_hi += 1;
-        rep_lo -= kTicksPerSecond;
-      }
-    }
-    ts.tv_sec = rep_hi;
-    if (ts.tv_sec == rep_hi) {  // no time_t narrowing
-      ts.tv_nsec = rep_lo / kTicksPerNanosecond;
-      return ts;
-    }
-  }
-  if (d >= ZeroDuration()) {
-    ts.tv_sec = std::numeric_limits<time_t>::max();
-    ts.tv_nsec = 1000 * 1000 * 1000 - 1;
-  } else {
-    ts.tv_sec = std::numeric_limits<time_t>::min();
-    ts.tv_nsec = 0;
-  }
-  return ts;
-}
-
-timeval ToTimeval(Duration d) {
-  timeval tv;
-  timespec ts = ToTimespec(d);
-  if (ts.tv_sec < 0) {
-    // Tweak the fields so that positive division of tv_nsec
-    // maps to truncation (towards zero) for the timeval.
-    ts.tv_nsec += 1000 - 1;
-    if (ts.tv_nsec >= 1000 * 1000 * 1000) {
-      ts.tv_sec += 1;
-      ts.tv_nsec -= 1000 * 1000 * 1000;
-    }
-  }
-  tv.tv_sec = ts.tv_sec;
-  if (tv.tv_sec != ts.tv_sec) {  // narrowing
-    if (ts.tv_sec < 0) {
-      tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::min();
-      tv.tv_usec = 0;
-    } else {
-      tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::max();
-      tv.tv_usec = 1000 * 1000 - 1;
-    }
-    return tv;
-  }
-  tv.tv_usec = static_cast<int>(ts.tv_nsec / 1000);  // suseconds_t
-  return tv;
-}
-
-std::chrono::nanoseconds ToChronoNanoseconds(Duration d) {
-  return time_internal::ToChronoDuration<std::chrono::nanoseconds>(d);
-}
-std::chrono::microseconds ToChronoMicroseconds(Duration d) {
-  return time_internal::ToChronoDuration<std::chrono::microseconds>(d);
-}
-std::chrono::milliseconds ToChronoMilliseconds(Duration d) {
-  return time_internal::ToChronoDuration<std::chrono::milliseconds>(d);
-}
-std::chrono::seconds ToChronoSeconds(Duration d) {
-  return time_internal::ToChronoDuration<std::chrono::seconds>(d);
-}
-std::chrono::minutes ToChronoMinutes(Duration d) {
-  return time_internal::ToChronoDuration<std::chrono::minutes>(d);
-}
-std::chrono::hours ToChronoHours(Duration d) {
-  return time_internal::ToChronoDuration<std::chrono::hours>(d);
-}
-
-//
-// To/From string formatting.
-//
-
-namespace {
-
-// Formats a positive 64-bit integer in the given field width.  Note that
-// it is up to the caller of Format64() to ensure that there is sufficient
-// space before ep to hold the conversion.
-char* Format64(char* ep, int width, int64_t v) {
-  do {
-    --width;
-    *--ep = '0' + (v % 10);  // contiguous digits
-  } while (v /= 10);
-  while (--width >= 0) *--ep = '0';  // zero pad
-  return ep;
-}
-
-// Helpers for FormatDuration() that format 'n' and append it to 'out'
-// followed by the given 'unit'.  If 'n' formats to "0", nothing is
-// appended (not even the unit).
-
-// A type that encapsulates how to display a value of a particular unit. For
-// values that are displayed with fractional parts, the precision indicates
-// where to round the value. The precision varies with the display unit because
-// a Duration can hold only quarters of a nanosecond, so displaying information
-// beyond that is just noise.
-//
-// For example, a microsecond value of 42.00025xxxxx should not display beyond 5
-// fractional digits, because it is in the noise of what a Duration can
-// represent.
-struct DisplayUnit {
-  absl::string_view abbr;
-  int prec;
-  double pow10;
-};
-ABSL_CONST_INIT const DisplayUnit kDisplayNano = {"ns", 2, 1e2};
-ABSL_CONST_INIT const DisplayUnit kDisplayMicro = {"us", 5, 1e5};
-ABSL_CONST_INIT const DisplayUnit kDisplayMilli = {"ms", 8, 1e8};
-ABSL_CONST_INIT const DisplayUnit kDisplaySec = {"s", 11, 1e11};
-ABSL_CONST_INIT const DisplayUnit kDisplayMin = {"m", -1, 0.0};  // prec ignored
-ABSL_CONST_INIT const DisplayUnit kDisplayHour = {"h", -1,
-                                                  0.0};  // prec ignored
-
-void AppendNumberUnit(std::string* out, int64_t n, DisplayUnit unit) {
-  char buf[sizeof("2562047788015216")];  // hours in max duration
-  char* const ep = buf + sizeof(buf);
-  char* bp = Format64(ep, 0, n);
-  if (*bp != '0' || bp + 1 != ep) {
-    out->append(bp, ep - bp);
-    out->append(unit.abbr.data(), unit.abbr.size());
-  }
-}
-
-// Note: unit.prec is limited to double's digits10 value (typically 15) so it
-// always fits in buf[].
-void AppendNumberUnit(std::string* out, double n, DisplayUnit unit) {
-  constexpr int kBufferSize = std::numeric_limits<double>::digits10;
-  const int prec = std::min(kBufferSize, unit.prec);
-  char buf[kBufferSize];  // also large enough to hold integer part
-  char* ep = buf + sizeof(buf);
-  double d = 0;
-  int64_t frac_part = Round(std::modf(n, &d) * unit.pow10);
-  int64_t int_part = d;
-  if (int_part != 0 || frac_part != 0) {
-    char* bp = Format64(ep, 0, int_part);  // always < 1000
-    out->append(bp, ep - bp);
-    if (frac_part != 0) {
-      out->push_back('.');
-      bp = Format64(ep, prec, frac_part);
-      while (ep[-1] == '0') --ep;
-      out->append(bp, ep - bp);
-    }
-    out->append(unit.abbr.data(), unit.abbr.size());
-  }
-}
-
-}  // namespace
-
-// From Go's doc at https://golang.org/pkg/time/#Duration.String
-//   [FormatDuration] returns a string representing the duration in the
-//   form "72h3m0.5s". Leading zero units are omitted.  As a special
-//   case, durations less than one second format use a smaller unit
-//   (milli-, micro-, or nanoseconds) to ensure that the leading digit
-//   is non-zero.
-// Unlike Go, we format the zero duration as 0, with no unit.
-std::string FormatDuration(Duration d) {
-  const Duration min_duration = Seconds(kint64min);
-  if (d == min_duration) {
-    // Avoid needing to negate kint64min by directly returning what the
-    // following code should produce in that case.
-    return "-2562047788015215h30m8s";
-  }
-  std::string s;
-  if (d < ZeroDuration()) {
-    s.append("-");
-    d = -d;
-  }
-  if (d == InfiniteDuration()) {
-    s.append("inf");
-  } else if (d < Seconds(1)) {
-    // Special case for durations with a magnitude < 1 second.  The duration
-    // is printed as a fraction of a single unit, e.g., "1.2ms".
-    if (d < Microseconds(1)) {
-      AppendNumberUnit(&s, FDivDuration(d, Nanoseconds(1)), kDisplayNano);
-    } else if (d < Milliseconds(1)) {
-      AppendNumberUnit(&s, FDivDuration(d, Microseconds(1)), kDisplayMicro);
-    } else {
-      AppendNumberUnit(&s, FDivDuration(d, Milliseconds(1)), kDisplayMilli);
-    }
-  } else {
-    AppendNumberUnit(&s, IDivDuration(d, Hours(1), &d), kDisplayHour);
-    AppendNumberUnit(&s, IDivDuration(d, Minutes(1), &d), kDisplayMin);
-    AppendNumberUnit(&s, FDivDuration(d, Seconds(1)), kDisplaySec);
-  }
-  if (s.empty() || s == "-") {
-    s = "0";
-  }
-  return s;
-}
-
-namespace {
-
-// A helper for ParseDuration() that parses a leading number from the given
-// string and stores the result in *int_part/*frac_part/*frac_scale.  The
-// given string pointer is modified to point to the first unconsumed char.
-bool ConsumeDurationNumber(const char** dpp, const char* ep, int64_t* int_part,
-                           int64_t* frac_part, int64_t* frac_scale) {
-  *int_part = 0;
-  *frac_part = 0;
-  *frac_scale = 1;  // invariant: *frac_part < *frac_scale
-  const char* start = *dpp;
-  for (; *dpp != ep; *dpp += 1) {
-    const int d = **dpp - '0';  // contiguous digits
-    if (d < 0 || 10 <= d) break;
-
-    if (*int_part > kint64max / 10) return false;
-    *int_part *= 10;
-    if (*int_part > kint64max - d) return false;
-    *int_part += d;
-  }
-  const bool int_part_empty = (*dpp == start);
-  if (*dpp == ep || **dpp != '.') return !int_part_empty;
-
-  for (*dpp += 1; *dpp != ep; *dpp += 1) {
-    const int d = **dpp - '0';  // contiguous digits
-    if (d < 0 || 10 <= d) break;
-    if (*frac_scale <= kint64max / 10) {
-      *frac_part *= 10;
-      *frac_part += d;
-      *frac_scale *= 10;
-    }
-  }
-  return !int_part_empty || *frac_scale != 1;
-}
-
-// A helper for ParseDuration() that parses a leading unit designator (e.g.,
-// ns, us, ms, s, m, h) from the given string and stores the resulting unit
-// in "*unit".  The given string pointer is modified to point to the first
-// unconsumed char.
-bool ConsumeDurationUnit(const char** start, const char* end, Duration* unit) {
-  size_t size = end - *start;
-  switch (size) {
-    case 0:
-      return false;
-    default:
-      switch (**start) {
-        case 'n':
-          if (*(*start + 1) == 's') {
-            *start += 2;
-            *unit = Nanoseconds(1);
-            return true;
-          }
-          break;
-        case 'u':
-          if (*(*start + 1) == 's') {
-            *start += 2;
-            *unit = Microseconds(1);
-            return true;
-          }
-          break;
-        case 'm':
-          if (*(*start + 1) == 's') {
-            *start += 2;
-            *unit = Milliseconds(1);
-            return true;
-          }
-          break;
-        default:
-          break;
-      }
-      ABSL_FALLTHROUGH_INTENDED;
-    case 1:
-      switch (**start) {
-        case 's':
-          *unit = Seconds(1);
-          *start += 1;
-          return true;
-        case 'm':
-          *unit = Minutes(1);
-          *start += 1;
-          return true;
-        case 'h':
-          *unit = Hours(1);
-          *start += 1;
-          return true;
-        default:
-          return false;
-      }
-  }
-}
-
-}  // namespace
-
-// From Go's doc at https://golang.org/pkg/time/#ParseDuration
-//   [ParseDuration] parses a duration string. A duration string is
-//   a possibly signed sequence of decimal numbers, each with optional
-//   fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m".
-//   Valid time units are "ns", "us" "ms", "s", "m", "h".
-bool ParseDuration(absl::string_view dur_sv, Duration* d) {
-  int sign = 1;
-  if (absl::ConsumePrefix(&dur_sv, "-")) {
-    sign = -1;
-  } else {
-    absl::ConsumePrefix(&dur_sv, "+");
-  }
-  if (dur_sv.empty()) return false;
-
-  // Special case for a string of "0".
-  if (dur_sv == "0") {
-    *d = ZeroDuration();
-    return true;
-  }
-
-  if (dur_sv == "inf") {
-    *d = sign * InfiniteDuration();
-    return true;
-  }
-
-  const char* start = dur_sv.data();
-  const char* end = start + dur_sv.size();
-
-  Duration dur;
-  while (start != end) {
-    int64_t int_part;
-    int64_t frac_part;
-    int64_t frac_scale;
-    Duration unit;
-    if (!ConsumeDurationNumber(&start, end, &int_part, &frac_part,
-                               &frac_scale) ||
-        !ConsumeDurationUnit(&start, end, &unit)) {
-      return false;
-    }
-    if (int_part != 0) dur += sign * int_part * unit;
-    if (frac_part != 0) dur += sign * frac_part * unit / frac_scale;
-  }
-  *d = dur;
-  return true;
-}
-
-bool AbslParseFlag(absl::string_view text, Duration* dst, std::string*) {
-  return ParseDuration(text, dst);
-}
-
-std::string AbslUnparseFlag(Duration d) { return FormatDuration(d); }
-bool ParseFlag(const std::string& text, Duration* dst, std::string* ) {
-  return ParseDuration(text, dst);
-}
-
-std::string UnparseFlag(Duration d) { return FormatDuration(d); }
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/duration_benchmark.cc b/third_party/abseil/absl/time/duration_benchmark.cc
deleted file mode 100644
index 56820f3..0000000
--- a/third_party/abseil/absl/time/duration_benchmark.cc
+++ /dev/null
@@ -1,444 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <ctime>
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/flags/flag.h"
-#include "absl/time/time.h"
-#include "benchmark/benchmark.h"
-
-ABSL_FLAG(absl::Duration, absl_duration_flag_for_benchmark,
-          absl::Milliseconds(1),
-          "Flag to use for benchmarking duration flag access speed.");
-
-namespace {
-
-//
-// Factory functions
-//
-
-void BM_Duration_Factory_Nanoseconds(benchmark::State& state) {
-  int64_t i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Nanoseconds(i));
-    i += 314159;
-  }
-}
-BENCHMARK(BM_Duration_Factory_Nanoseconds);
-
-void BM_Duration_Factory_Microseconds(benchmark::State& state) {
-  int64_t i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Microseconds(i));
-    i += 314;
-  }
-}
-BENCHMARK(BM_Duration_Factory_Microseconds);
-
-void BM_Duration_Factory_Milliseconds(benchmark::State& state) {
-  int64_t i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Milliseconds(i));
-    i += 1;
-  }
-}
-BENCHMARK(BM_Duration_Factory_Milliseconds);
-
-void BM_Duration_Factory_Seconds(benchmark::State& state) {
-  int64_t i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Seconds(i));
-    i += 1;
-  }
-}
-BENCHMARK(BM_Duration_Factory_Seconds);
-
-void BM_Duration_Factory_Minutes(benchmark::State& state) {
-  int64_t i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Minutes(i));
-    i += 1;
-  }
-}
-BENCHMARK(BM_Duration_Factory_Minutes);
-
-void BM_Duration_Factory_Hours(benchmark::State& state) {
-  int64_t i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Hours(i));
-    i += 1;
-  }
-}
-BENCHMARK(BM_Duration_Factory_Hours);
-
-void BM_Duration_Factory_DoubleNanoseconds(benchmark::State& state) {
-  double d = 1;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Nanoseconds(d));
-    d = d * 1.00000001 + 1;
-  }
-}
-BENCHMARK(BM_Duration_Factory_DoubleNanoseconds);
-
-void BM_Duration_Factory_DoubleMicroseconds(benchmark::State& state) {
-  double d = 1e-3;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Microseconds(d));
-    d = d * 1.00000001 + 1e-3;
-  }
-}
-BENCHMARK(BM_Duration_Factory_DoubleMicroseconds);
-
-void BM_Duration_Factory_DoubleMilliseconds(benchmark::State& state) {
-  double d = 1e-6;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Milliseconds(d));
-    d = d * 1.00000001 + 1e-6;
-  }
-}
-BENCHMARK(BM_Duration_Factory_DoubleMilliseconds);
-
-void BM_Duration_Factory_DoubleSeconds(benchmark::State& state) {
-  double d = 1e-9;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Seconds(d));
-    d = d * 1.00000001 + 1e-9;
-  }
-}
-BENCHMARK(BM_Duration_Factory_DoubleSeconds);
-
-void BM_Duration_Factory_DoubleMinutes(benchmark::State& state) {
-  double d = 1e-9;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Minutes(d));
-    d = d * 1.00000001 + 1e-9;
-  }
-}
-BENCHMARK(BM_Duration_Factory_DoubleMinutes);
-
-void BM_Duration_Factory_DoubleHours(benchmark::State& state) {
-  double d = 1e-9;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::Hours(d));
-    d = d * 1.00000001 + 1e-9;
-  }
-}
-BENCHMARK(BM_Duration_Factory_DoubleHours);
-
-//
-// Arithmetic
-//
-
-void BM_Duration_Addition(benchmark::State& state) {
-  absl::Duration d = absl::Nanoseconds(1);
-  absl::Duration step = absl::Milliseconds(1);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(d += step);
-  }
-}
-BENCHMARK(BM_Duration_Addition);
-
-void BM_Duration_Subtraction(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(std::numeric_limits<int64_t>::max());
-  absl::Duration step = absl::Milliseconds(1);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(d -= step);
-  }
-}
-BENCHMARK(BM_Duration_Subtraction);
-
-void BM_Duration_Multiplication_Fixed(benchmark::State& state) {
-  absl::Duration d = absl::Milliseconds(1);
-  absl::Duration s;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(s += d * (i + 1));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_Multiplication_Fixed);
-
-void BM_Duration_Multiplication_Double(benchmark::State& state) {
-  absl::Duration d = absl::Milliseconds(1);
-  absl::Duration s;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(s += d * (i + 1.0));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_Multiplication_Double);
-
-void BM_Duration_Division_Fixed(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(1);
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(d /= i + 1);
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_Division_Fixed);
-
-void BM_Duration_Division_Double(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(1);
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(d /= i + 1.0);
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_Division_Double);
-
-void BM_Duration_FDivDuration_Nanoseconds(benchmark::State& state) {
-  double d = 1;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(
-        d += absl::FDivDuration(absl::Milliseconds(i), absl::Nanoseconds(1)));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_FDivDuration_Nanoseconds);
-
-void BM_Duration_IDivDuration_Nanoseconds(benchmark::State& state) {
-  int64_t a = 1;
-  absl::Duration ignore;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(a +=
-                             absl::IDivDuration(absl::Nanoseconds(i),
-                                                absl::Nanoseconds(1), &ignore));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_IDivDuration_Nanoseconds);
-
-void BM_Duration_IDivDuration_Microseconds(benchmark::State& state) {
-  int64_t a = 1;
-  absl::Duration ignore;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(a += absl::IDivDuration(absl::Microseconds(i),
-                                                     absl::Microseconds(1),
-                                                     &ignore));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_IDivDuration_Microseconds);
-
-void BM_Duration_IDivDuration_Milliseconds(benchmark::State& state) {
-  int64_t a = 1;
-  absl::Duration ignore;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(a += absl::IDivDuration(absl::Milliseconds(i),
-                                                     absl::Milliseconds(1),
-                                                     &ignore));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_IDivDuration_Milliseconds);
-
-void BM_Duration_IDivDuration_Seconds(benchmark::State& state) {
-  int64_t a = 1;
-  absl::Duration ignore;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(
-        a += absl::IDivDuration(absl::Seconds(i), absl::Seconds(1), &ignore));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_IDivDuration_Seconds);
-
-void BM_Duration_IDivDuration_Minutes(benchmark::State& state) {
-  int64_t a = 1;
-  absl::Duration ignore;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(
-        a += absl::IDivDuration(absl::Minutes(i), absl::Minutes(1), &ignore));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_IDivDuration_Minutes);
-
-void BM_Duration_IDivDuration_Hours(benchmark::State& state) {
-  int64_t a = 1;
-  absl::Duration ignore;
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(
-        a += absl::IDivDuration(absl::Hours(i), absl::Hours(1), &ignore));
-    ++i;
-  }
-}
-BENCHMARK(BM_Duration_IDivDuration_Hours);
-
-void BM_Duration_ToInt64Nanoseconds(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(100000);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToInt64Nanoseconds(d));
-  }
-}
-BENCHMARK(BM_Duration_ToInt64Nanoseconds);
-
-void BM_Duration_ToInt64Microseconds(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(100000);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToInt64Microseconds(d));
-  }
-}
-BENCHMARK(BM_Duration_ToInt64Microseconds);
-
-void BM_Duration_ToInt64Milliseconds(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(100000);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToInt64Milliseconds(d));
-  }
-}
-BENCHMARK(BM_Duration_ToInt64Milliseconds);
-
-void BM_Duration_ToInt64Seconds(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(100000);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToInt64Seconds(d));
-  }
-}
-BENCHMARK(BM_Duration_ToInt64Seconds);
-
-void BM_Duration_ToInt64Minutes(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(100000);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToInt64Minutes(d));
-  }
-}
-BENCHMARK(BM_Duration_ToInt64Minutes);
-
-void BM_Duration_ToInt64Hours(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(100000);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToInt64Hours(d));
-  }
-}
-BENCHMARK(BM_Duration_ToInt64Hours);
-
-//
-// To/FromTimespec
-//
-
-void BM_Duration_ToTimespec_AbslTime(benchmark::State& state) {
-  absl::Duration d = absl::Seconds(1);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToTimespec(d));
-  }
-}
-BENCHMARK(BM_Duration_ToTimespec_AbslTime);
-
-ABSL_ATTRIBUTE_NOINLINE timespec DoubleToTimespec(double seconds) {
-  timespec ts;
-  ts.tv_sec = seconds;
-  ts.tv_nsec = (seconds - ts.tv_sec) * (1000 * 1000 * 1000);
-  return ts;
-}
-
-void BM_Duration_ToTimespec_Double(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(DoubleToTimespec(1.0));
-  }
-}
-BENCHMARK(BM_Duration_ToTimespec_Double);
-
-void BM_Duration_FromTimespec_AbslTime(benchmark::State& state) {
-  timespec ts;
-  ts.tv_sec = 0;
-  ts.tv_nsec = 0;
-  while (state.KeepRunning()) {
-    if (++ts.tv_nsec == 1000 * 1000 * 1000) {
-      ++ts.tv_sec;
-      ts.tv_nsec = 0;
-    }
-    benchmark::DoNotOptimize(absl::DurationFromTimespec(ts));
-  }
-}
-BENCHMARK(BM_Duration_FromTimespec_AbslTime);
-
-ABSL_ATTRIBUTE_NOINLINE double TimespecToDouble(timespec ts) {
-  return ts.tv_sec + (ts.tv_nsec / (1000 * 1000 * 1000));
-}
-
-void BM_Duration_FromTimespec_Double(benchmark::State& state) {
-  timespec ts;
-  ts.tv_sec = 0;
-  ts.tv_nsec = 0;
-  while (state.KeepRunning()) {
-    if (++ts.tv_nsec == 1000 * 1000 * 1000) {
-      ++ts.tv_sec;
-      ts.tv_nsec = 0;
-    }
-    benchmark::DoNotOptimize(TimespecToDouble(ts));
-  }
-}
-BENCHMARK(BM_Duration_FromTimespec_Double);
-
-//
-// String conversions
-//
-
-const char* const kDurations[] = {
-    "0",                                   // 0
-    "123ns",                               // 1
-    "1h2m3s",                              // 2
-    "-2h3m4.005006007s",                   // 3
-    "2562047788015215h30m7.99999999975s",  // 4
-};
-const int kNumDurations = sizeof(kDurations) / sizeof(kDurations[0]);
-
-void BM_Duration_FormatDuration(benchmark::State& state) {
-  const std::string s = kDurations[state.range(0)];
-  state.SetLabel(s);
-  absl::Duration d;
-  absl::ParseDuration(kDurations[state.range(0)], &d);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::FormatDuration(d));
-  }
-}
-BENCHMARK(BM_Duration_FormatDuration)->DenseRange(0, kNumDurations - 1);
-
-void BM_Duration_ParseDuration(benchmark::State& state) {
-  const std::string s = kDurations[state.range(0)];
-  state.SetLabel(s);
-  absl::Duration d;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ParseDuration(s, &d));
-  }
-}
-BENCHMARK(BM_Duration_ParseDuration)->DenseRange(0, kNumDurations - 1);
-
-//
-// Flag access
-//
-void BM_Duration_GetFlag(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(
-        absl::GetFlag(FLAGS_absl_duration_flag_for_benchmark));
-  }
-}
-BENCHMARK(BM_Duration_GetFlag);
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/duration_test.cc b/third_party/abseil/absl/time/duration_test.cc
deleted file mode 100644
index 4d85a2c..0000000
--- a/third_party/abseil/absl/time/duration_test.cc
+++ /dev/null
@@ -1,1808 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#if defined(_MSC_VER)
-#include <winsock2.h>  // for timeval
-#endif
-
-#include <chrono>  // NOLINT(build/c++11)
-#include <cmath>
-#include <cstdint>
-#include <ctime>
-#include <iomanip>
-#include <limits>
-#include <random>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/time/time.h"
-
-namespace {
-
-constexpr int64_t kint64max = std::numeric_limits<int64_t>::max();
-constexpr int64_t kint64min = std::numeric_limits<int64_t>::min();
-
-// Approximates the given number of years. This is only used to make some test
-// code more readable.
-absl::Duration ApproxYears(int64_t n) { return absl::Hours(n) * 365 * 24; }
-
-// A gMock matcher to match timespec values. Use this matcher like:
-// timespec ts1, ts2;
-// EXPECT_THAT(ts1, TimespecMatcher(ts2));
-MATCHER_P(TimespecMatcher, ts, "") {
-  if (ts.tv_sec == arg.tv_sec && ts.tv_nsec == arg.tv_nsec)
-    return true;
-  *result_listener << "expected: {" << ts.tv_sec << ", " << ts.tv_nsec << "} ";
-  *result_listener << "actual: {" << arg.tv_sec << ", " << arg.tv_nsec << "}";
-  return false;
-}
-
-// A gMock matcher to match timeval values. Use this matcher like:
-// timeval tv1, tv2;
-// EXPECT_THAT(tv1, TimevalMatcher(tv2));
-MATCHER_P(TimevalMatcher, tv, "") {
-  if (tv.tv_sec == arg.tv_sec && tv.tv_usec == arg.tv_usec)
-    return true;
-  *result_listener << "expected: {" << tv.tv_sec << ", " << tv.tv_usec << "} ";
-  *result_listener << "actual: {" << arg.tv_sec << ", " << arg.tv_usec << "}";
-  return false;
-}
-
-TEST(Duration, ConstExpr) {
-  constexpr absl::Duration d0 = absl::ZeroDuration();
-  static_assert(d0 == absl::ZeroDuration(), "ZeroDuration()");
-  constexpr absl::Duration d1 = absl::Seconds(1);
-  static_assert(d1 == absl::Seconds(1), "Seconds(1)");
-  static_assert(d1 != absl::ZeroDuration(), "Seconds(1)");
-  constexpr absl::Duration d2 = absl::InfiniteDuration();
-  static_assert(d2 == absl::InfiniteDuration(), "InfiniteDuration()");
-  static_assert(d2 != absl::ZeroDuration(), "InfiniteDuration()");
-}
-
-TEST(Duration, ValueSemantics) {
-  // If this compiles, the test passes.
-  constexpr absl::Duration a;      // Default construction
-  constexpr absl::Duration b = a;  // Copy construction
-  constexpr absl::Duration c(b);   // Copy construction (again)
-
-  absl::Duration d;
-  d = c;  // Assignment
-}
-
-TEST(Duration, Factories) {
-  constexpr absl::Duration zero = absl::ZeroDuration();
-  constexpr absl::Duration nano = absl::Nanoseconds(1);
-  constexpr absl::Duration micro = absl::Microseconds(1);
-  constexpr absl::Duration milli = absl::Milliseconds(1);
-  constexpr absl::Duration sec = absl::Seconds(1);
-  constexpr absl::Duration min = absl::Minutes(1);
-  constexpr absl::Duration hour = absl::Hours(1);
-
-  EXPECT_EQ(zero, absl::Duration());
-  EXPECT_EQ(zero, absl::Seconds(0));
-  EXPECT_EQ(nano, absl::Nanoseconds(1));
-  EXPECT_EQ(micro, absl::Nanoseconds(1000));
-  EXPECT_EQ(milli, absl::Microseconds(1000));
-  EXPECT_EQ(sec, absl::Milliseconds(1000));
-  EXPECT_EQ(min, absl::Seconds(60));
-  EXPECT_EQ(hour, absl::Minutes(60));
-
-  // Tests factory limits
-  const absl::Duration inf = absl::InfiniteDuration();
-
-  EXPECT_GT(inf, absl::Seconds(kint64max));
-  EXPECT_LT(-inf, absl::Seconds(kint64min));
-  EXPECT_LT(-inf, absl::Seconds(-kint64max));
-
-  EXPECT_EQ(inf, absl::Minutes(kint64max));
-  EXPECT_EQ(-inf, absl::Minutes(kint64min));
-  EXPECT_EQ(-inf, absl::Minutes(-kint64max));
-  EXPECT_GT(inf, absl::Minutes(kint64max / 60));
-  EXPECT_LT(-inf, absl::Minutes(kint64min / 60));
-  EXPECT_LT(-inf, absl::Minutes(-kint64max / 60));
-
-  EXPECT_EQ(inf, absl::Hours(kint64max));
-  EXPECT_EQ(-inf, absl::Hours(kint64min));
-  EXPECT_EQ(-inf, absl::Hours(-kint64max));
-  EXPECT_GT(inf, absl::Hours(kint64max / 3600));
-  EXPECT_LT(-inf, absl::Hours(kint64min / 3600));
-  EXPECT_LT(-inf, absl::Hours(-kint64max / 3600));
-}
-
-TEST(Duration, ToConversion) {
-#define TEST_DURATION_CONVERSION(UNIT)                                  \
-  do {                                                                  \
-    const absl::Duration d = absl::UNIT(1.5);                           \
-    constexpr absl::Duration z = absl::ZeroDuration();                  \
-    constexpr absl::Duration inf = absl::InfiniteDuration();            \
-    constexpr double dbl_inf = std::numeric_limits<double>::infinity(); \
-    EXPECT_EQ(kint64min, absl::ToInt64##UNIT(-inf));                    \
-    EXPECT_EQ(-1, absl::ToInt64##UNIT(-d));                             \
-    EXPECT_EQ(0, absl::ToInt64##UNIT(z));                               \
-    EXPECT_EQ(1, absl::ToInt64##UNIT(d));                               \
-    EXPECT_EQ(kint64max, absl::ToInt64##UNIT(inf));                     \
-    EXPECT_EQ(-dbl_inf, absl::ToDouble##UNIT(-inf));                    \
-    EXPECT_EQ(-1.5, absl::ToDouble##UNIT(-d));                          \
-    EXPECT_EQ(0, absl::ToDouble##UNIT(z));                              \
-    EXPECT_EQ(1.5, absl::ToDouble##UNIT(d));                            \
-    EXPECT_EQ(dbl_inf, absl::ToDouble##UNIT(inf));                      \
-  } while (0)
-
-  TEST_DURATION_CONVERSION(Nanoseconds);
-  TEST_DURATION_CONVERSION(Microseconds);
-  TEST_DURATION_CONVERSION(Milliseconds);
-  TEST_DURATION_CONVERSION(Seconds);
-  TEST_DURATION_CONVERSION(Minutes);
-  TEST_DURATION_CONVERSION(Hours);
-
-#undef TEST_DURATION_CONVERSION
-}
-
-template <int64_t N>
-void TestToConversion() {
-  constexpr absl::Duration nano = absl::Nanoseconds(N);
-  EXPECT_EQ(N, absl::ToInt64Nanoseconds(nano));
-  EXPECT_EQ(0, absl::ToInt64Microseconds(nano));
-  EXPECT_EQ(0, absl::ToInt64Milliseconds(nano));
-  EXPECT_EQ(0, absl::ToInt64Seconds(nano));
-  EXPECT_EQ(0, absl::ToInt64Minutes(nano));
-  EXPECT_EQ(0, absl::ToInt64Hours(nano));
-  const absl::Duration micro = absl::Microseconds(N);
-  EXPECT_EQ(N * 1000, absl::ToInt64Nanoseconds(micro));
-  EXPECT_EQ(N, absl::ToInt64Microseconds(micro));
-  EXPECT_EQ(0, absl::ToInt64Milliseconds(micro));
-  EXPECT_EQ(0, absl::ToInt64Seconds(micro));
-  EXPECT_EQ(0, absl::ToInt64Minutes(micro));
-  EXPECT_EQ(0, absl::ToInt64Hours(micro));
-  const absl::Duration milli = absl::Milliseconds(N);
-  EXPECT_EQ(N * 1000 * 1000, absl::ToInt64Nanoseconds(milli));
-  EXPECT_EQ(N * 1000, absl::ToInt64Microseconds(milli));
-  EXPECT_EQ(N, absl::ToInt64Milliseconds(milli));
-  EXPECT_EQ(0, absl::ToInt64Seconds(milli));
-  EXPECT_EQ(0, absl::ToInt64Minutes(milli));
-  EXPECT_EQ(0, absl::ToInt64Hours(milli));
-  const absl::Duration sec = absl::Seconds(N);
-  EXPECT_EQ(N * 1000 * 1000 * 1000, absl::ToInt64Nanoseconds(sec));
-  EXPECT_EQ(N * 1000 * 1000, absl::ToInt64Microseconds(sec));
-  EXPECT_EQ(N * 1000, absl::ToInt64Milliseconds(sec));
-  EXPECT_EQ(N, absl::ToInt64Seconds(sec));
-  EXPECT_EQ(0, absl::ToInt64Minutes(sec));
-  EXPECT_EQ(0, absl::ToInt64Hours(sec));
-  const absl::Duration min = absl::Minutes(N);
-  EXPECT_EQ(N * 60 * 1000 * 1000 * 1000, absl::ToInt64Nanoseconds(min));
-  EXPECT_EQ(N * 60 * 1000 * 1000, absl::ToInt64Microseconds(min));
-  EXPECT_EQ(N * 60 * 1000, absl::ToInt64Milliseconds(min));
-  EXPECT_EQ(N * 60, absl::ToInt64Seconds(min));
-  EXPECT_EQ(N, absl::ToInt64Minutes(min));
-  EXPECT_EQ(0, absl::ToInt64Hours(min));
-  const absl::Duration hour = absl::Hours(N);
-  EXPECT_EQ(N * 60 * 60 * 1000 * 1000 * 1000, absl::ToInt64Nanoseconds(hour));
-  EXPECT_EQ(N * 60 * 60 * 1000 * 1000, absl::ToInt64Microseconds(hour));
-  EXPECT_EQ(N * 60 * 60 * 1000, absl::ToInt64Milliseconds(hour));
-  EXPECT_EQ(N * 60 * 60, absl::ToInt64Seconds(hour));
-  EXPECT_EQ(N * 60, absl::ToInt64Minutes(hour));
-  EXPECT_EQ(N, absl::ToInt64Hours(hour));
-}
-
-TEST(Duration, ToConversionDeprecated) {
-  TestToConversion<43>();
-  TestToConversion<1>();
-  TestToConversion<0>();
-  TestToConversion<-1>();
-  TestToConversion<-43>();
-}
-
-template <int64_t N>
-void TestFromChronoBasicEquality() {
-  using std::chrono::nanoseconds;
-  using std::chrono::microseconds;
-  using std::chrono::milliseconds;
-  using std::chrono::seconds;
-  using std::chrono::minutes;
-  using std::chrono::hours;
-
-  static_assert(absl::Nanoseconds(N) == absl::FromChrono(nanoseconds(N)), "");
-  static_assert(absl::Microseconds(N) == absl::FromChrono(microseconds(N)), "");
-  static_assert(absl::Milliseconds(N) == absl::FromChrono(milliseconds(N)), "");
-  static_assert(absl::Seconds(N) == absl::FromChrono(seconds(N)), "");
-  static_assert(absl::Minutes(N) == absl::FromChrono(minutes(N)), "");
-  static_assert(absl::Hours(N) == absl::FromChrono(hours(N)), "");
-}
-
-TEST(Duration, FromChrono) {
-  TestFromChronoBasicEquality<-123>();
-  TestFromChronoBasicEquality<-1>();
-  TestFromChronoBasicEquality<0>();
-  TestFromChronoBasicEquality<1>();
-  TestFromChronoBasicEquality<123>();
-
-  // Minutes (might, depending on the platform) saturate at +inf.
-  const auto chrono_minutes_max = std::chrono::minutes::max();
-  const auto minutes_max = absl::FromChrono(chrono_minutes_max);
-  const int64_t minutes_max_count = chrono_minutes_max.count();
-  if (minutes_max_count > kint64max / 60) {
-    EXPECT_EQ(absl::InfiniteDuration(), minutes_max);
-  } else {
-    EXPECT_EQ(absl::Minutes(minutes_max_count), minutes_max);
-  }
-
-  // Minutes (might, depending on the platform) saturate at -inf.
-  const auto chrono_minutes_min = std::chrono::minutes::min();
-  const auto minutes_min = absl::FromChrono(chrono_minutes_min);
-  const int64_t minutes_min_count = chrono_minutes_min.count();
-  if (minutes_min_count < kint64min / 60) {
-    EXPECT_EQ(-absl::InfiniteDuration(), minutes_min);
-  } else {
-    EXPECT_EQ(absl::Minutes(minutes_min_count), minutes_min);
-  }
-
-  // Hours (might, depending on the platform) saturate at +inf.
-  const auto chrono_hours_max = std::chrono::hours::max();
-  const auto hours_max = absl::FromChrono(chrono_hours_max);
-  const int64_t hours_max_count = chrono_hours_max.count();
-  if (hours_max_count > kint64max / 3600) {
-    EXPECT_EQ(absl::InfiniteDuration(), hours_max);
-  } else {
-    EXPECT_EQ(absl::Hours(hours_max_count), hours_max);
-  }
-
-  // Hours (might, depending on the platform) saturate at -inf.
-  const auto chrono_hours_min = std::chrono::hours::min();
-  const auto hours_min = absl::FromChrono(chrono_hours_min);
-  const int64_t hours_min_count = chrono_hours_min.count();
-  if (hours_min_count < kint64min / 3600) {
-    EXPECT_EQ(-absl::InfiniteDuration(), hours_min);
-  } else {
-    EXPECT_EQ(absl::Hours(hours_min_count), hours_min);
-  }
-}
-
-template <int64_t N>
-void TestToChrono() {
-  using std::chrono::nanoseconds;
-  using std::chrono::microseconds;
-  using std::chrono::milliseconds;
-  using std::chrono::seconds;
-  using std::chrono::minutes;
-  using std::chrono::hours;
-
-  EXPECT_EQ(nanoseconds(N), absl::ToChronoNanoseconds(absl::Nanoseconds(N)));
-  EXPECT_EQ(microseconds(N), absl::ToChronoMicroseconds(absl::Microseconds(N)));
-  EXPECT_EQ(milliseconds(N), absl::ToChronoMilliseconds(absl::Milliseconds(N)));
-  EXPECT_EQ(seconds(N), absl::ToChronoSeconds(absl::Seconds(N)));
-
-  constexpr auto absl_minutes = absl::Minutes(N);
-  auto chrono_minutes = minutes(N);
-  if (absl_minutes == -absl::InfiniteDuration()) {
-    chrono_minutes = minutes::min();
-  } else if (absl_minutes == absl::InfiniteDuration()) {
-    chrono_minutes = minutes::max();
-  }
-  EXPECT_EQ(chrono_minutes, absl::ToChronoMinutes(absl_minutes));
-
-  constexpr auto absl_hours = absl::Hours(N);
-  auto chrono_hours = hours(N);
-  if (absl_hours == -absl::InfiniteDuration()) {
-    chrono_hours = hours::min();
-  } else if (absl_hours == absl::InfiniteDuration()) {
-    chrono_hours = hours::max();
-  }
-  EXPECT_EQ(chrono_hours, absl::ToChronoHours(absl_hours));
-}
-
-TEST(Duration, ToChrono) {
-  using std::chrono::nanoseconds;
-  using std::chrono::microseconds;
-  using std::chrono::milliseconds;
-  using std::chrono::seconds;
-  using std::chrono::minutes;
-  using std::chrono::hours;
-
-  TestToChrono<kint64min>();
-  TestToChrono<-1>();
-  TestToChrono<0>();
-  TestToChrono<1>();
-  TestToChrono<kint64max>();
-
-  // Verify truncation toward zero.
-  const auto tick = absl::Nanoseconds(1) / 4;
-  EXPECT_EQ(nanoseconds(0), absl::ToChronoNanoseconds(tick));
-  EXPECT_EQ(nanoseconds(0), absl::ToChronoNanoseconds(-tick));
-  EXPECT_EQ(microseconds(0), absl::ToChronoMicroseconds(tick));
-  EXPECT_EQ(microseconds(0), absl::ToChronoMicroseconds(-tick));
-  EXPECT_EQ(milliseconds(0), absl::ToChronoMilliseconds(tick));
-  EXPECT_EQ(milliseconds(0), absl::ToChronoMilliseconds(-tick));
-  EXPECT_EQ(seconds(0), absl::ToChronoSeconds(tick));
-  EXPECT_EQ(seconds(0), absl::ToChronoSeconds(-tick));
-  EXPECT_EQ(minutes(0), absl::ToChronoMinutes(tick));
-  EXPECT_EQ(minutes(0), absl::ToChronoMinutes(-tick));
-  EXPECT_EQ(hours(0), absl::ToChronoHours(tick));
-  EXPECT_EQ(hours(0), absl::ToChronoHours(-tick));
-
-  // Verifies +/- infinity saturation at max/min.
-  constexpr auto inf = absl::InfiniteDuration();
-  EXPECT_EQ(nanoseconds::min(), absl::ToChronoNanoseconds(-inf));
-  EXPECT_EQ(nanoseconds::max(), absl::ToChronoNanoseconds(inf));
-  EXPECT_EQ(microseconds::min(), absl::ToChronoMicroseconds(-inf));
-  EXPECT_EQ(microseconds::max(), absl::ToChronoMicroseconds(inf));
-  EXPECT_EQ(milliseconds::min(), absl::ToChronoMilliseconds(-inf));
-  EXPECT_EQ(milliseconds::max(), absl::ToChronoMilliseconds(inf));
-  EXPECT_EQ(seconds::min(), absl::ToChronoSeconds(-inf));
-  EXPECT_EQ(seconds::max(), absl::ToChronoSeconds(inf));
-  EXPECT_EQ(minutes::min(), absl::ToChronoMinutes(-inf));
-  EXPECT_EQ(minutes::max(), absl::ToChronoMinutes(inf));
-  EXPECT_EQ(hours::min(), absl::ToChronoHours(-inf));
-  EXPECT_EQ(hours::max(), absl::ToChronoHours(inf));
-}
-
-TEST(Duration, FactoryOverloads) {
-  enum E { kOne = 1 };
-#define TEST_FACTORY_OVERLOADS(NAME)                                          \
-  EXPECT_EQ(1, NAME(kOne) / NAME(kOne));                                      \
-  EXPECT_EQ(1, NAME(static_cast<int8_t>(1)) / NAME(1));                       \
-  EXPECT_EQ(1, NAME(static_cast<int16_t>(1)) / NAME(1));                      \
-  EXPECT_EQ(1, NAME(static_cast<int32_t>(1)) / NAME(1));                      \
-  EXPECT_EQ(1, NAME(static_cast<int64_t>(1)) / NAME(1));                      \
-  EXPECT_EQ(1, NAME(static_cast<uint8_t>(1)) / NAME(1));                      \
-  EXPECT_EQ(1, NAME(static_cast<uint16_t>(1)) / NAME(1));                     \
-  EXPECT_EQ(1, NAME(static_cast<uint32_t>(1)) / NAME(1));                     \
-  EXPECT_EQ(1, NAME(static_cast<uint64_t>(1)) / NAME(1));                     \
-  EXPECT_EQ(NAME(1) / 2, NAME(static_cast<float>(0.5)));                      \
-  EXPECT_EQ(NAME(1) / 2, NAME(static_cast<double>(0.5)));                     \
-  EXPECT_EQ(1.5, absl::FDivDuration(NAME(static_cast<float>(1.5)), NAME(1))); \
-  EXPECT_EQ(1.5, absl::FDivDuration(NAME(static_cast<double>(1.5)), NAME(1)));
-
-  TEST_FACTORY_OVERLOADS(absl::Nanoseconds);
-  TEST_FACTORY_OVERLOADS(absl::Microseconds);
-  TEST_FACTORY_OVERLOADS(absl::Milliseconds);
-  TEST_FACTORY_OVERLOADS(absl::Seconds);
-  TEST_FACTORY_OVERLOADS(absl::Minutes);
-  TEST_FACTORY_OVERLOADS(absl::Hours);
-
-#undef TEST_FACTORY_OVERLOADS
-
-  EXPECT_EQ(absl::Milliseconds(1500), absl::Seconds(1.5));
-  EXPECT_LT(absl::Nanoseconds(1), absl::Nanoseconds(1.5));
-  EXPECT_GT(absl::Nanoseconds(2), absl::Nanoseconds(1.5));
-
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-  EXPECT_EQ(absl::InfiniteDuration(), absl::Nanoseconds(dbl_inf));
-  EXPECT_EQ(absl::InfiniteDuration(), absl::Microseconds(dbl_inf));
-  EXPECT_EQ(absl::InfiniteDuration(), absl::Milliseconds(dbl_inf));
-  EXPECT_EQ(absl::InfiniteDuration(), absl::Seconds(dbl_inf));
-  EXPECT_EQ(absl::InfiniteDuration(), absl::Minutes(dbl_inf));
-  EXPECT_EQ(absl::InfiniteDuration(), absl::Hours(dbl_inf));
-  EXPECT_EQ(-absl::InfiniteDuration(), absl::Nanoseconds(-dbl_inf));
-  EXPECT_EQ(-absl::InfiniteDuration(), absl::Microseconds(-dbl_inf));
-  EXPECT_EQ(-absl::InfiniteDuration(), absl::Milliseconds(-dbl_inf));
-  EXPECT_EQ(-absl::InfiniteDuration(), absl::Seconds(-dbl_inf));
-  EXPECT_EQ(-absl::InfiniteDuration(), absl::Minutes(-dbl_inf));
-  EXPECT_EQ(-absl::InfiniteDuration(), absl::Hours(-dbl_inf));
-}
-
-TEST(Duration, InfinityExamples) {
-  // These examples are used in the documentation in time.h. They are
-  // written so that they can be copy-n-pasted easily.
-
-  constexpr absl::Duration inf = absl::InfiniteDuration();
-  constexpr absl::Duration d = absl::Seconds(1);  // Any finite duration
-
-  EXPECT_TRUE(inf == inf + inf);
-  EXPECT_TRUE(inf == inf + d);
-  EXPECT_TRUE(inf == inf - inf);
-  EXPECT_TRUE(-inf == d - inf);
-
-  EXPECT_TRUE(inf == d * 1e100);
-  EXPECT_TRUE(0 == d / inf);  // NOLINT(readability/check)
-
-  // Division by zero returns infinity, or kint64min/MAX where necessary.
-  EXPECT_TRUE(inf == d / 0);
-  EXPECT_TRUE(kint64max == d / absl::ZeroDuration());
-}
-
-TEST(Duration, InfinityComparison) {
-  const absl::Duration inf = absl::InfiniteDuration();
-  const absl::Duration any_dur = absl::Seconds(1);
-
-  // Equality
-  EXPECT_EQ(inf, inf);
-  EXPECT_EQ(-inf, -inf);
-  EXPECT_NE(inf, -inf);
-  EXPECT_NE(any_dur, inf);
-  EXPECT_NE(any_dur, -inf);
-
-  // Relational
-  EXPECT_GT(inf, any_dur);
-  EXPECT_LT(-inf, any_dur);
-  EXPECT_LT(-inf, inf);
-  EXPECT_GT(inf, -inf);
-}
-
-TEST(Duration, InfinityAddition) {
-  const absl::Duration sec_max = absl::Seconds(kint64max);
-  const absl::Duration sec_min = absl::Seconds(kint64min);
-  const absl::Duration any_dur = absl::Seconds(1);
-  const absl::Duration inf = absl::InfiniteDuration();
-
-  // Addition
-  EXPECT_EQ(inf, inf + inf);
-  EXPECT_EQ(inf, inf + -inf);
-  EXPECT_EQ(-inf, -inf + inf);
-  EXPECT_EQ(-inf, -inf + -inf);
-
-  EXPECT_EQ(inf, inf + any_dur);
-  EXPECT_EQ(inf, any_dur + inf);
-  EXPECT_EQ(-inf, -inf + any_dur);
-  EXPECT_EQ(-inf, any_dur + -inf);
-
-  // Interesting case
-  absl::Duration almost_inf = sec_max + absl::Nanoseconds(999999999);
-  EXPECT_GT(inf, almost_inf);
-  almost_inf += -absl::Nanoseconds(999999999);
-  EXPECT_GT(inf, almost_inf);
-
-  // Addition overflow/underflow
-  EXPECT_EQ(inf, sec_max + absl::Seconds(1));
-  EXPECT_EQ(inf, sec_max + sec_max);
-  EXPECT_EQ(-inf, sec_min + -absl::Seconds(1));
-  EXPECT_EQ(-inf, sec_min + -sec_max);
-
-  // For reference: IEEE 754 behavior
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-  EXPECT_TRUE(std::isinf(dbl_inf + dbl_inf));
-  EXPECT_TRUE(std::isnan(dbl_inf + -dbl_inf));  // We return inf
-  EXPECT_TRUE(std::isnan(-dbl_inf + dbl_inf));  // We return inf
-  EXPECT_TRUE(std::isinf(-dbl_inf + -dbl_inf));
-}
-
-TEST(Duration, InfinitySubtraction) {
-  const absl::Duration sec_max = absl::Seconds(kint64max);
-  const absl::Duration sec_min = absl::Seconds(kint64min);
-  const absl::Duration any_dur = absl::Seconds(1);
-  const absl::Duration inf = absl::InfiniteDuration();
-
-  // Subtraction
-  EXPECT_EQ(inf, inf - inf);
-  EXPECT_EQ(inf, inf - -inf);
-  EXPECT_EQ(-inf, -inf - inf);
-  EXPECT_EQ(-inf, -inf - -inf);
-
-  EXPECT_EQ(inf, inf - any_dur);
-  EXPECT_EQ(-inf, any_dur - inf);
-  EXPECT_EQ(-inf, -inf - any_dur);
-  EXPECT_EQ(inf, any_dur - -inf);
-
-  // Subtraction overflow/underflow
-  EXPECT_EQ(inf, sec_max - -absl::Seconds(1));
-  EXPECT_EQ(inf, sec_max - -sec_max);
-  EXPECT_EQ(-inf, sec_min - absl::Seconds(1));
-  EXPECT_EQ(-inf, sec_min - sec_max);
-
-  // Interesting case
-  absl::Duration almost_neg_inf = sec_min;
-  EXPECT_LT(-inf, almost_neg_inf);
-  almost_neg_inf -= -absl::Nanoseconds(1);
-  EXPECT_LT(-inf, almost_neg_inf);
-
-  // For reference: IEEE 754 behavior
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-  EXPECT_TRUE(std::isnan(dbl_inf - dbl_inf));  // We return inf
-  EXPECT_TRUE(std::isinf(dbl_inf - -dbl_inf));
-  EXPECT_TRUE(std::isinf(-dbl_inf - dbl_inf));
-  EXPECT_TRUE(std::isnan(-dbl_inf - -dbl_inf));  // We return inf
-}
-
-TEST(Duration, InfinityMultiplication) {
-  const absl::Duration sec_max = absl::Seconds(kint64max);
-  const absl::Duration sec_min = absl::Seconds(kint64min);
-  const absl::Duration inf = absl::InfiniteDuration();
-
-#define TEST_INF_MUL_WITH_TYPE(T)                                     \
-  EXPECT_EQ(inf, inf * static_cast<T>(2));                            \
-  EXPECT_EQ(-inf, inf * static_cast<T>(-2));                          \
-  EXPECT_EQ(-inf, -inf * static_cast<T>(2));                          \
-  EXPECT_EQ(inf, -inf * static_cast<T>(-2));                          \
-  EXPECT_EQ(inf, inf * static_cast<T>(0));                            \
-  EXPECT_EQ(-inf, -inf * static_cast<T>(0));                          \
-  EXPECT_EQ(inf, sec_max * static_cast<T>(2));                        \
-  EXPECT_EQ(inf, sec_min * static_cast<T>(-2));                       \
-  EXPECT_EQ(inf, (sec_max / static_cast<T>(2)) * static_cast<T>(3));  \
-  EXPECT_EQ(-inf, sec_max * static_cast<T>(-2));                      \
-  EXPECT_EQ(-inf, sec_min * static_cast<T>(2));                       \
-  EXPECT_EQ(-inf, (sec_min / static_cast<T>(2)) * static_cast<T>(3));
-
-  TEST_INF_MUL_WITH_TYPE(int64_t);  // NOLINT(readability/function)
-  TEST_INF_MUL_WITH_TYPE(double);   // NOLINT(readability/function)
-
-#undef TEST_INF_MUL_WITH_TYPE
-
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-  EXPECT_EQ(inf, inf * dbl_inf);
-  EXPECT_EQ(-inf, -inf * dbl_inf);
-  EXPECT_EQ(-inf, inf * -dbl_inf);
-  EXPECT_EQ(inf, -inf * -dbl_inf);
-
-  const absl::Duration any_dur = absl::Seconds(1);
-  EXPECT_EQ(inf, any_dur * dbl_inf);
-  EXPECT_EQ(-inf, -any_dur * dbl_inf);
-  EXPECT_EQ(-inf, any_dur * -dbl_inf);
-  EXPECT_EQ(inf, -any_dur * -dbl_inf);
-
-  // Fixed-point multiplication will produce a finite value, whereas floating
-  // point fuzziness will overflow to inf.
-  EXPECT_NE(absl::InfiniteDuration(), absl::Seconds(1) * kint64max);
-  EXPECT_EQ(inf, absl::Seconds(1) * static_cast<double>(kint64max));
-  EXPECT_NE(-absl::InfiniteDuration(), absl::Seconds(1) * kint64min);
-  EXPECT_EQ(-inf, absl::Seconds(1) * static_cast<double>(kint64min));
-
-  // Note that sec_max * or / by 1.0 overflows to inf due to the 53-bit
-  // limitations of double.
-  EXPECT_NE(inf, sec_max);
-  EXPECT_NE(inf, sec_max / 1);
-  EXPECT_EQ(inf, sec_max / 1.0);
-  EXPECT_NE(inf, sec_max * 1);
-  EXPECT_EQ(inf, sec_max * 1.0);
-}
-
-TEST(Duration, InfinityDivision) {
-  const absl::Duration sec_max = absl::Seconds(kint64max);
-  const absl::Duration sec_min = absl::Seconds(kint64min);
-  const absl::Duration inf = absl::InfiniteDuration();
-
-  // Division of Duration by a double
-#define TEST_INF_DIV_WITH_TYPE(T)            \
-  EXPECT_EQ(inf, inf / static_cast<T>(2));   \
-  EXPECT_EQ(-inf, inf / static_cast<T>(-2)); \
-  EXPECT_EQ(-inf, -inf / static_cast<T>(2)); \
-  EXPECT_EQ(inf, -inf / static_cast<T>(-2));
-
-  TEST_INF_DIV_WITH_TYPE(int64_t);  // NOLINT(readability/function)
-  TEST_INF_DIV_WITH_TYPE(double);   // NOLINT(readability/function)
-
-#undef TEST_INF_DIV_WITH_TYPE
-
-  // Division of Duration by a double overflow/underflow
-  EXPECT_EQ(inf, sec_max / 0.5);
-  EXPECT_EQ(inf, sec_min / -0.5);
-  EXPECT_EQ(inf, ((sec_max / 0.5) + absl::Seconds(1)) / 0.5);
-  EXPECT_EQ(-inf, sec_max / -0.5);
-  EXPECT_EQ(-inf, sec_min / 0.5);
-  EXPECT_EQ(-inf, ((sec_min / 0.5) - absl::Seconds(1)) / 0.5);
-
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-  EXPECT_EQ(inf, inf / dbl_inf);
-  EXPECT_EQ(-inf, inf / -dbl_inf);
-  EXPECT_EQ(-inf, -inf / dbl_inf);
-  EXPECT_EQ(inf, -inf / -dbl_inf);
-
-  const absl::Duration any_dur = absl::Seconds(1);
-  EXPECT_EQ(absl::ZeroDuration(), any_dur / dbl_inf);
-  EXPECT_EQ(absl::ZeroDuration(), any_dur / -dbl_inf);
-  EXPECT_EQ(absl::ZeroDuration(), -any_dur / dbl_inf);
-  EXPECT_EQ(absl::ZeroDuration(), -any_dur / -dbl_inf);
-}
-
-TEST(Duration, InfinityModulus) {
-  const absl::Duration sec_max = absl::Seconds(kint64max);
-  const absl::Duration any_dur = absl::Seconds(1);
-  const absl::Duration inf = absl::InfiniteDuration();
-
-  EXPECT_EQ(inf, inf % inf);
-  EXPECT_EQ(inf, inf % -inf);
-  EXPECT_EQ(-inf, -inf % -inf);
-  EXPECT_EQ(-inf, -inf % inf);
-
-  EXPECT_EQ(any_dur, any_dur % inf);
-  EXPECT_EQ(any_dur, any_dur % -inf);
-  EXPECT_EQ(-any_dur, -any_dur % inf);
-  EXPECT_EQ(-any_dur, -any_dur % -inf);
-
-  EXPECT_EQ(inf, inf % -any_dur);
-  EXPECT_EQ(inf, inf % any_dur);
-  EXPECT_EQ(-inf, -inf % -any_dur);
-  EXPECT_EQ(-inf, -inf % any_dur);
-
-  // Remainder isn't affected by overflow.
-  EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Seconds(1));
-  EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Milliseconds(1));
-  EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Microseconds(1));
-  EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Nanoseconds(1));
-  EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Nanoseconds(1) / 4);
-}
-
-TEST(Duration, InfinityIDiv) {
-  const absl::Duration sec_max = absl::Seconds(kint64max);
-  const absl::Duration any_dur = absl::Seconds(1);
-  const absl::Duration inf = absl::InfiniteDuration();
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-
-  // IDivDuration (int64_t return value + a remainer)
-  absl::Duration rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64max, absl::IDivDuration(inf, inf, &rem));
-  EXPECT_EQ(inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64max, absl::IDivDuration(-inf, -inf, &rem));
-  EXPECT_EQ(-inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64max, absl::IDivDuration(inf, any_dur, &rem));
-  EXPECT_EQ(inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(0, absl::IDivDuration(any_dur, inf, &rem));
-  EXPECT_EQ(any_dur, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64max, absl::IDivDuration(-inf, -any_dur, &rem));
-  EXPECT_EQ(-inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(0, absl::IDivDuration(-any_dur, -inf, &rem));
-  EXPECT_EQ(-any_dur, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64min, absl::IDivDuration(-inf, inf, &rem));
-  EXPECT_EQ(-inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64min, absl::IDivDuration(inf, -inf, &rem));
-  EXPECT_EQ(inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64min, absl::IDivDuration(-inf, any_dur, &rem));
-  EXPECT_EQ(-inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(0, absl::IDivDuration(-any_dur, inf, &rem));
-  EXPECT_EQ(-any_dur, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(kint64min, absl::IDivDuration(inf, -any_dur, &rem));
-  EXPECT_EQ(inf, rem);
-
-  rem = absl::ZeroDuration();
-  EXPECT_EQ(0, absl::IDivDuration(any_dur, -inf, &rem));
-  EXPECT_EQ(any_dur, rem);
-
-  // IDivDuration overflow/underflow
-  rem = any_dur;
-  EXPECT_EQ(kint64max,
-            absl::IDivDuration(sec_max, absl::Nanoseconds(1) / 4, &rem));
-  EXPECT_EQ(sec_max - absl::Nanoseconds(kint64max) / 4, rem);
-
-  rem = any_dur;
-  EXPECT_EQ(kint64max,
-            absl::IDivDuration(sec_max, absl::Milliseconds(1), &rem));
-  EXPECT_EQ(sec_max - absl::Milliseconds(kint64max), rem);
-
-  rem = any_dur;
-  EXPECT_EQ(kint64max,
-            absl::IDivDuration(-sec_max, -absl::Milliseconds(1), &rem));
-  EXPECT_EQ(-sec_max + absl::Milliseconds(kint64max), rem);
-
-  rem = any_dur;
-  EXPECT_EQ(kint64min,
-            absl::IDivDuration(-sec_max, absl::Milliseconds(1), &rem));
-  EXPECT_EQ(-sec_max - absl::Milliseconds(kint64min), rem);
-
-  rem = any_dur;
-  EXPECT_EQ(kint64min,
-            absl::IDivDuration(sec_max, -absl::Milliseconds(1), &rem));
-  EXPECT_EQ(sec_max + absl::Milliseconds(kint64min), rem);
-
-  //
-  // operator/(Duration, Duration) is a wrapper for IDivDuration().
-  //
-
-  // IEEE 754 says inf / inf should be nan, but int64_t doesn't have
-  // nan so we'll return kint64max/kint64min instead.
-  EXPECT_TRUE(std::isnan(dbl_inf / dbl_inf));
-  EXPECT_EQ(kint64max, inf / inf);
-  EXPECT_EQ(kint64max, -inf / -inf);
-  EXPECT_EQ(kint64min, -inf / inf);
-  EXPECT_EQ(kint64min, inf / -inf);
-
-  EXPECT_TRUE(std::isinf(dbl_inf / 2.0));
-  EXPECT_EQ(kint64max, inf / any_dur);
-  EXPECT_EQ(kint64max, -inf / -any_dur);
-  EXPECT_EQ(kint64min, -inf / any_dur);
-  EXPECT_EQ(kint64min, inf / -any_dur);
-
-  EXPECT_EQ(0.0, 2.0 / dbl_inf);
-  EXPECT_EQ(0, any_dur / inf);
-  EXPECT_EQ(0, any_dur / -inf);
-  EXPECT_EQ(0, -any_dur / inf);
-  EXPECT_EQ(0, -any_dur / -inf);
-  EXPECT_EQ(0, absl::ZeroDuration() / inf);
-
-  // Division of Duration by a Duration overflow/underflow
-  EXPECT_EQ(kint64max, sec_max / absl::Milliseconds(1));
-  EXPECT_EQ(kint64max, -sec_max / -absl::Milliseconds(1));
-  EXPECT_EQ(kint64min, -sec_max / absl::Milliseconds(1));
-  EXPECT_EQ(kint64min, sec_max / -absl::Milliseconds(1));
-}
-
-TEST(Duration, InfinityFDiv) {
-  const absl::Duration any_dur = absl::Seconds(1);
-  const absl::Duration inf = absl::InfiniteDuration();
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-
-  EXPECT_EQ(dbl_inf, absl::FDivDuration(inf, inf));
-  EXPECT_EQ(dbl_inf, absl::FDivDuration(-inf, -inf));
-  EXPECT_EQ(dbl_inf, absl::FDivDuration(inf, any_dur));
-  EXPECT_EQ(0.0, absl::FDivDuration(any_dur, inf));
-  EXPECT_EQ(dbl_inf, absl::FDivDuration(-inf, -any_dur));
-  EXPECT_EQ(0.0, absl::FDivDuration(-any_dur, -inf));
-
-  EXPECT_EQ(-dbl_inf, absl::FDivDuration(-inf, inf));
-  EXPECT_EQ(-dbl_inf, absl::FDivDuration(inf, -inf));
-  EXPECT_EQ(-dbl_inf, absl::FDivDuration(-inf, any_dur));
-  EXPECT_EQ(0.0, absl::FDivDuration(-any_dur, inf));
-  EXPECT_EQ(-dbl_inf, absl::FDivDuration(inf, -any_dur));
-  EXPECT_EQ(0.0, absl::FDivDuration(any_dur, -inf));
-}
-
-TEST(Duration, DivisionByZero) {
-  const absl::Duration zero = absl::ZeroDuration();
-  const absl::Duration inf = absl::InfiniteDuration();
-  const absl::Duration any_dur = absl::Seconds(1);
-  const double dbl_inf = std::numeric_limits<double>::infinity();
-  const double dbl_denorm = std::numeric_limits<double>::denorm_min();
-
-  // Operator/(Duration, double)
-  EXPECT_EQ(inf, zero / 0.0);
-  EXPECT_EQ(-inf, zero / -0.0);
-  EXPECT_EQ(inf, any_dur / 0.0);
-  EXPECT_EQ(-inf, any_dur / -0.0);
-  EXPECT_EQ(-inf, -any_dur / 0.0);
-  EXPECT_EQ(inf, -any_dur / -0.0);
-
-  // Tests dividing by a number very close to, but not quite zero.
-  EXPECT_EQ(zero, zero / dbl_denorm);
-  EXPECT_EQ(zero, zero / -dbl_denorm);
-  EXPECT_EQ(inf, any_dur / dbl_denorm);
-  EXPECT_EQ(-inf, any_dur / -dbl_denorm);
-  EXPECT_EQ(-inf, -any_dur / dbl_denorm);
-  EXPECT_EQ(inf, -any_dur / -dbl_denorm);
-
-  // IDiv
-  absl::Duration rem = zero;
-  EXPECT_EQ(kint64max, absl::IDivDuration(zero, zero, &rem));
-  EXPECT_EQ(inf, rem);
-
-  rem = zero;
-  EXPECT_EQ(kint64max, absl::IDivDuration(any_dur, zero, &rem));
-  EXPECT_EQ(inf, rem);
-
-  rem = zero;
-  EXPECT_EQ(kint64min, absl::IDivDuration(-any_dur, zero, &rem));
-  EXPECT_EQ(-inf, rem);
-
-  // Operator/(Duration, Duration)
-  EXPECT_EQ(kint64max, zero / zero);
-  EXPECT_EQ(kint64max, any_dur / zero);
-  EXPECT_EQ(kint64min, -any_dur / zero);
-
-  // FDiv
-  EXPECT_EQ(dbl_inf, absl::FDivDuration(zero, zero));
-  EXPECT_EQ(dbl_inf, absl::FDivDuration(any_dur, zero));
-  EXPECT_EQ(-dbl_inf, absl::FDivDuration(-any_dur, zero));
-}
-
-TEST(Duration, NaN) {
-  // Note that IEEE 754 does not define the behavior of a nan's sign when it is
-  // copied, so the code below allows for either + or - InfiniteDuration.
-#define TEST_NAN_HANDLING(NAME, NAN)           \
-  do {                                         \
-    const auto inf = absl::InfiniteDuration(); \
-    auto x = NAME(NAN);                        \
-    EXPECT_TRUE(x == inf || x == -inf);        \
-    auto y = NAME(42);                         \
-    y *= NAN;                                  \
-    EXPECT_TRUE(y == inf || y == -inf);        \
-    auto z = NAME(42);                         \
-    z /= NAN;                                  \
-    EXPECT_TRUE(z == inf || z == -inf);        \
-  } while (0)
-
-  const double nan = std::numeric_limits<double>::quiet_NaN();
-  TEST_NAN_HANDLING(absl::Nanoseconds, nan);
-  TEST_NAN_HANDLING(absl::Microseconds, nan);
-  TEST_NAN_HANDLING(absl::Milliseconds, nan);
-  TEST_NAN_HANDLING(absl::Seconds, nan);
-  TEST_NAN_HANDLING(absl::Minutes, nan);
-  TEST_NAN_HANDLING(absl::Hours, nan);
-
-  TEST_NAN_HANDLING(absl::Nanoseconds, -nan);
-  TEST_NAN_HANDLING(absl::Microseconds, -nan);
-  TEST_NAN_HANDLING(absl::Milliseconds, -nan);
-  TEST_NAN_HANDLING(absl::Seconds, -nan);
-  TEST_NAN_HANDLING(absl::Minutes, -nan);
-  TEST_NAN_HANDLING(absl::Hours, -nan);
-
-#undef TEST_NAN_HANDLING
-}
-
-TEST(Duration, Range) {
-  const absl::Duration range = ApproxYears(100 * 1e9);
-  const absl::Duration range_future = range;
-  const absl::Duration range_past = -range;
-
-  EXPECT_LT(range_future, absl::InfiniteDuration());
-  EXPECT_GT(range_past, -absl::InfiniteDuration());
-
-  const absl::Duration full_range = range_future - range_past;
-  EXPECT_GT(full_range, absl::ZeroDuration());
-  EXPECT_LT(full_range, absl::InfiniteDuration());
-
-  const absl::Duration neg_full_range = range_past - range_future;
-  EXPECT_LT(neg_full_range, absl::ZeroDuration());
-  EXPECT_GT(neg_full_range, -absl::InfiniteDuration());
-
-  EXPECT_LT(neg_full_range, full_range);
-  EXPECT_EQ(neg_full_range, -full_range);
-}
-
-TEST(Duration, RelationalOperators) {
-#define TEST_REL_OPS(UNIT)               \
-  static_assert(UNIT(2) == UNIT(2), ""); \
-  static_assert(UNIT(1) != UNIT(2), ""); \
-  static_assert(UNIT(1) < UNIT(2), "");  \
-  static_assert(UNIT(3) > UNIT(2), "");  \
-  static_assert(UNIT(1) <= UNIT(2), ""); \
-  static_assert(UNIT(2) <= UNIT(2), ""); \
-  static_assert(UNIT(3) >= UNIT(2), ""); \
-  static_assert(UNIT(2) >= UNIT(2), "");
-
-  TEST_REL_OPS(absl::Nanoseconds);
-  TEST_REL_OPS(absl::Microseconds);
-  TEST_REL_OPS(absl::Milliseconds);
-  TEST_REL_OPS(absl::Seconds);
-  TEST_REL_OPS(absl::Minutes);
-  TEST_REL_OPS(absl::Hours);
-
-#undef TEST_REL_OPS
-}
-
-TEST(Duration, Addition) {
-#define TEST_ADD_OPS(UNIT)                  \
-  do {                                      \
-    EXPECT_EQ(UNIT(2), UNIT(1) + UNIT(1));  \
-    EXPECT_EQ(UNIT(1), UNIT(2) - UNIT(1));  \
-    EXPECT_EQ(UNIT(0), UNIT(2) - UNIT(2));  \
-    EXPECT_EQ(UNIT(-1), UNIT(1) - UNIT(2)); \
-    EXPECT_EQ(UNIT(-2), UNIT(0) - UNIT(2)); \
-    EXPECT_EQ(UNIT(-2), UNIT(1) - UNIT(3)); \
-    absl::Duration a = UNIT(1);             \
-    a += UNIT(1);                           \
-    EXPECT_EQ(UNIT(2), a);                  \
-    a -= UNIT(1);                           \
-    EXPECT_EQ(UNIT(1), a);                  \
-  } while (0)
-
-  TEST_ADD_OPS(absl::Nanoseconds);
-  TEST_ADD_OPS(absl::Microseconds);
-  TEST_ADD_OPS(absl::Milliseconds);
-  TEST_ADD_OPS(absl::Seconds);
-  TEST_ADD_OPS(absl::Minutes);
-  TEST_ADD_OPS(absl::Hours);
-
-#undef TEST_ADD_OPS
-
-  EXPECT_EQ(absl::Seconds(2), absl::Seconds(3) - 2 * absl::Milliseconds(500));
-  EXPECT_EQ(absl::Seconds(2) + absl::Milliseconds(500),
-            absl::Seconds(3) - absl::Milliseconds(500));
-
-  EXPECT_EQ(absl::Seconds(1) + absl::Milliseconds(998),
-            absl::Milliseconds(999) + absl::Milliseconds(999));
-
-  EXPECT_EQ(absl::Milliseconds(-1),
-            absl::Milliseconds(998) - absl::Milliseconds(999));
-
-  // Tests fractions of a nanoseconds. These are implementation details only.
-  EXPECT_GT(absl::Nanoseconds(1), absl::Nanoseconds(1) / 2);
-  EXPECT_EQ(absl::Nanoseconds(1),
-            absl::Nanoseconds(1) / 2 + absl::Nanoseconds(1) / 2);
-  EXPECT_GT(absl::Nanoseconds(1) / 4, absl::Nanoseconds(0));
-  EXPECT_EQ(absl::Nanoseconds(1) / 8, absl::Nanoseconds(0));
-
-  // Tests subtraction that will cause wrap around of the rep_lo_ bits.
-  absl::Duration d_7_5 = absl::Seconds(7) + absl::Milliseconds(500);
-  absl::Duration d_3_7 = absl::Seconds(3) + absl::Milliseconds(700);
-  absl::Duration ans_3_8 = absl::Seconds(3) + absl::Milliseconds(800);
-  EXPECT_EQ(ans_3_8, d_7_5 - d_3_7);
-
-  // Subtracting min_duration
-  absl::Duration min_dur = absl::Seconds(kint64min);
-  EXPECT_EQ(absl::Seconds(0), min_dur - min_dur);
-  EXPECT_EQ(absl::Seconds(kint64max), absl::Seconds(-1) - min_dur);
-}
-
-TEST(Duration, Negation) {
-  // By storing negations of various values in constexpr variables we
-  // verify that the initializers are constant expressions.
-  constexpr absl::Duration negated_zero_duration = -absl::ZeroDuration();
-  EXPECT_EQ(negated_zero_duration, absl::ZeroDuration());
-
-  constexpr absl::Duration negated_infinite_duration =
-      -absl::InfiniteDuration();
-  EXPECT_NE(negated_infinite_duration, absl::InfiniteDuration());
-  EXPECT_EQ(-negated_infinite_duration, absl::InfiniteDuration());
-
-  // The public APIs to check if a duration is infinite depend on using
-  // -InfiniteDuration(), but we're trying to test operator- here, so we
-  // need to use the lower-level internal query IsInfiniteDuration.
-  EXPECT_TRUE(
-      absl::time_internal::IsInfiniteDuration(negated_infinite_duration));
-
-  // The largest Duration is kint64max seconds and kTicksPerSecond - 1 ticks.
-  // Using the absl::time_internal::MakeDuration API is the cleanest way to
-  // construct that Duration.
-  constexpr absl::Duration max_duration = absl::time_internal::MakeDuration(
-      kint64max, absl::time_internal::kTicksPerSecond - 1);
-  constexpr absl::Duration negated_max_duration = -max_duration;
-  // The largest negatable value is one tick above the minimum representable;
-  // it's the negation of max_duration.
-  constexpr absl::Duration nearly_min_duration =
-      absl::time_internal::MakeDuration(kint64min, int64_t{1});
-  constexpr absl::Duration negated_nearly_min_duration = -nearly_min_duration;
-
-  EXPECT_EQ(negated_max_duration, nearly_min_duration);
-  EXPECT_EQ(negated_nearly_min_duration, max_duration);
-  EXPECT_EQ(-(-max_duration), max_duration);
-
-  constexpr absl::Duration min_duration =
-      absl::time_internal::MakeDuration(kint64min);
-  constexpr absl::Duration negated_min_duration = -min_duration;
-  EXPECT_EQ(negated_min_duration, absl::InfiniteDuration());
-}
-
-TEST(Duration, AbsoluteValue) {
-  EXPECT_EQ(absl::ZeroDuration(), AbsDuration(absl::ZeroDuration()));
-  EXPECT_EQ(absl::Seconds(1), AbsDuration(absl::Seconds(1)));
-  EXPECT_EQ(absl::Seconds(1), AbsDuration(absl::Seconds(-1)));
-
-  EXPECT_EQ(absl::InfiniteDuration(), AbsDuration(absl::InfiniteDuration()));
-  EXPECT_EQ(absl::InfiniteDuration(), AbsDuration(-absl::InfiniteDuration()));
-
-  absl::Duration max_dur =
-      absl::Seconds(kint64max) + (absl::Seconds(1) - absl::Nanoseconds(1) / 4);
-  EXPECT_EQ(max_dur, AbsDuration(max_dur));
-
-  absl::Duration min_dur = absl::Seconds(kint64min);
-  EXPECT_EQ(absl::InfiniteDuration(), AbsDuration(min_dur));
-  EXPECT_EQ(max_dur, AbsDuration(min_dur + absl::Nanoseconds(1) / 4));
-}
-
-TEST(Duration, Multiplication) {
-#define TEST_MUL_OPS(UNIT)                                    \
-  do {                                                        \
-    EXPECT_EQ(UNIT(5), UNIT(2) * 2.5);                        \
-    EXPECT_EQ(UNIT(2), UNIT(5) / 2.5);                        \
-    EXPECT_EQ(UNIT(-5), UNIT(-2) * 2.5);                      \
-    EXPECT_EQ(UNIT(-5), -UNIT(2) * 2.5);                      \
-    EXPECT_EQ(UNIT(-5), UNIT(2) * -2.5);                      \
-    EXPECT_EQ(UNIT(-2), UNIT(-5) / 2.5);                      \
-    EXPECT_EQ(UNIT(-2), -UNIT(5) / 2.5);                      \
-    EXPECT_EQ(UNIT(-2), UNIT(5) / -2.5);                      \
-    EXPECT_EQ(UNIT(2), UNIT(11) % UNIT(3));                   \
-    absl::Duration a = UNIT(2);                               \
-    a *= 2.5;                                                 \
-    EXPECT_EQ(UNIT(5), a);                                    \
-    a /= 2.5;                                                 \
-    EXPECT_EQ(UNIT(2), a);                                    \
-    a %= UNIT(1);                                             \
-    EXPECT_EQ(UNIT(0), a);                                    \
-    absl::Duration big = UNIT(1000000000);                    \
-    big *= 3;                                                 \
-    big /= 3;                                                 \
-    EXPECT_EQ(UNIT(1000000000), big);                         \
-    EXPECT_EQ(-UNIT(2), -UNIT(2));                            \
-    EXPECT_EQ(-UNIT(2), UNIT(2) * -1);                        \
-    EXPECT_EQ(-UNIT(2), -1 * UNIT(2));                        \
-    EXPECT_EQ(-UNIT(-2), UNIT(2));                            \
-    EXPECT_EQ(2, UNIT(2) / UNIT(1));                          \
-    absl::Duration rem;                                       \
-    EXPECT_EQ(2, absl::IDivDuration(UNIT(2), UNIT(1), &rem)); \
-    EXPECT_EQ(2.0, absl::FDivDuration(UNIT(2), UNIT(1)));     \
-  } while (0)
-
-  TEST_MUL_OPS(absl::Nanoseconds);
-  TEST_MUL_OPS(absl::Microseconds);
-  TEST_MUL_OPS(absl::Milliseconds);
-  TEST_MUL_OPS(absl::Seconds);
-  TEST_MUL_OPS(absl::Minutes);
-  TEST_MUL_OPS(absl::Hours);
-
-#undef TEST_MUL_OPS
-
-  // Ensures that multiplication and division by 1 with a maxed-out durations
-  // doesn't lose precision.
-  absl::Duration max_dur =
-      absl::Seconds(kint64max) + (absl::Seconds(1) - absl::Nanoseconds(1) / 4);
-  absl::Duration min_dur = absl::Seconds(kint64min);
-  EXPECT_EQ(max_dur, max_dur * 1);
-  EXPECT_EQ(max_dur, max_dur / 1);
-  EXPECT_EQ(min_dur, min_dur * 1);
-  EXPECT_EQ(min_dur, min_dur / 1);
-
-  // Tests division on a Duration with a large number of significant digits.
-  // Tests when the digits span hi and lo as well as only in hi.
-  absl::Duration sigfigs = absl::Seconds(2000000000) + absl::Nanoseconds(3);
-  EXPECT_EQ(absl::Seconds(666666666) + absl::Nanoseconds(666666667) +
-                absl::Nanoseconds(1) / 2,
-            sigfigs / 3);
-  sigfigs = absl::Seconds(int64_t{7000000000});
-  EXPECT_EQ(absl::Seconds(2333333333) + absl::Nanoseconds(333333333) +
-                absl::Nanoseconds(1) / 4,
-            sigfigs / 3);
-
-  EXPECT_EQ(absl::Seconds(7) + absl::Milliseconds(500), absl::Seconds(3) * 2.5);
-  EXPECT_EQ(absl::Seconds(8) * -1 + absl::Milliseconds(300),
-            (absl::Seconds(2) + absl::Milliseconds(200)) * -3.5);
-  EXPECT_EQ(-absl::Seconds(8) + absl::Milliseconds(300),
-            (absl::Seconds(2) + absl::Milliseconds(200)) * -3.5);
-  EXPECT_EQ(absl::Seconds(1) + absl::Milliseconds(875),
-            (absl::Seconds(7) + absl::Milliseconds(500)) / 4);
-  EXPECT_EQ(absl::Seconds(30),
-            (absl::Seconds(7) + absl::Milliseconds(500)) / 0.25);
-  EXPECT_EQ(absl::Seconds(3),
-            (absl::Seconds(7) + absl::Milliseconds(500)) / 2.5);
-
-  // Tests division remainder.
-  EXPECT_EQ(absl::Nanoseconds(0), absl::Nanoseconds(7) % absl::Nanoseconds(1));
-  EXPECT_EQ(absl::Nanoseconds(0), absl::Nanoseconds(0) % absl::Nanoseconds(10));
-  EXPECT_EQ(absl::Nanoseconds(2), absl::Nanoseconds(7) % absl::Nanoseconds(5));
-  EXPECT_EQ(absl::Nanoseconds(2), absl::Nanoseconds(2) % absl::Nanoseconds(5));
-
-  EXPECT_EQ(absl::Nanoseconds(1), absl::Nanoseconds(10) % absl::Nanoseconds(3));
-  EXPECT_EQ(absl::Nanoseconds(1),
-            absl::Nanoseconds(10) % absl::Nanoseconds(-3));
-  EXPECT_EQ(absl::Nanoseconds(-1),
-            absl::Nanoseconds(-10) % absl::Nanoseconds(3));
-  EXPECT_EQ(absl::Nanoseconds(-1),
-            absl::Nanoseconds(-10) % absl::Nanoseconds(-3));
-
-  EXPECT_EQ(absl::Milliseconds(100),
-            absl::Seconds(1) % absl::Milliseconds(300));
-  EXPECT_EQ(
-      absl::Milliseconds(300),
-      (absl::Seconds(3) + absl::Milliseconds(800)) % absl::Milliseconds(500));
-
-  EXPECT_EQ(absl::Nanoseconds(1), absl::Nanoseconds(1) % absl::Seconds(1));
-  EXPECT_EQ(absl::Nanoseconds(-1), absl::Nanoseconds(-1) % absl::Seconds(1));
-  EXPECT_EQ(0, absl::Nanoseconds(-1) / absl::Seconds(1));  // Actual -1e-9
-
-  // Tests identity a = (a/b)*b + a%b
-#define TEST_MOD_IDENTITY(a, b) \
-  EXPECT_EQ((a), ((a) / (b))*(b) + ((a)%(b)))
-
-  TEST_MOD_IDENTITY(absl::Seconds(0), absl::Seconds(2));
-  TEST_MOD_IDENTITY(absl::Seconds(1), absl::Seconds(1));
-  TEST_MOD_IDENTITY(absl::Seconds(1), absl::Seconds(2));
-  TEST_MOD_IDENTITY(absl::Seconds(2), absl::Seconds(1));
-
-  TEST_MOD_IDENTITY(absl::Seconds(-2), absl::Seconds(1));
-  TEST_MOD_IDENTITY(absl::Seconds(2), absl::Seconds(-1));
-  TEST_MOD_IDENTITY(absl::Seconds(-2), absl::Seconds(-1));
-
-  TEST_MOD_IDENTITY(absl::Nanoseconds(0), absl::Nanoseconds(2));
-  TEST_MOD_IDENTITY(absl::Nanoseconds(1), absl::Nanoseconds(1));
-  TEST_MOD_IDENTITY(absl::Nanoseconds(1), absl::Nanoseconds(2));
-  TEST_MOD_IDENTITY(absl::Nanoseconds(2), absl::Nanoseconds(1));
-
-  TEST_MOD_IDENTITY(absl::Nanoseconds(-2), absl::Nanoseconds(1));
-  TEST_MOD_IDENTITY(absl::Nanoseconds(2), absl::Nanoseconds(-1));
-  TEST_MOD_IDENTITY(absl::Nanoseconds(-2), absl::Nanoseconds(-1));
-
-  // Mixed seconds + subseconds
-  absl::Duration mixed_a = absl::Seconds(1) + absl::Nanoseconds(2);
-  absl::Duration mixed_b = absl::Seconds(1) + absl::Nanoseconds(3);
-
-  TEST_MOD_IDENTITY(absl::Seconds(0), mixed_a);
-  TEST_MOD_IDENTITY(mixed_a, mixed_a);
-  TEST_MOD_IDENTITY(mixed_a, mixed_b);
-  TEST_MOD_IDENTITY(mixed_b, mixed_a);
-
-  TEST_MOD_IDENTITY(-mixed_a, mixed_b);
-  TEST_MOD_IDENTITY(mixed_a, -mixed_b);
-  TEST_MOD_IDENTITY(-mixed_a, -mixed_b);
-
-#undef TEST_MOD_IDENTITY
-}
-
-TEST(Duration, Truncation) {
-  const absl::Duration d = absl::Nanoseconds(1234567890);
-  const absl::Duration inf = absl::InfiniteDuration();
-  for (int unit_sign : {1, -1}) {  // sign shouldn't matter
-    EXPECT_EQ(absl::Nanoseconds(1234567890),
-              Trunc(d, unit_sign * absl::Nanoseconds(1)));
-    EXPECT_EQ(absl::Microseconds(1234567),
-              Trunc(d, unit_sign * absl::Microseconds(1)));
-    EXPECT_EQ(absl::Milliseconds(1234),
-              Trunc(d, unit_sign * absl::Milliseconds(1)));
-    EXPECT_EQ(absl::Seconds(1), Trunc(d, unit_sign * absl::Seconds(1)));
-    EXPECT_EQ(inf, Trunc(inf, unit_sign * absl::Seconds(1)));
-
-    EXPECT_EQ(absl::Nanoseconds(-1234567890),
-              Trunc(-d, unit_sign * absl::Nanoseconds(1)));
-    EXPECT_EQ(absl::Microseconds(-1234567),
-              Trunc(-d, unit_sign * absl::Microseconds(1)));
-    EXPECT_EQ(absl::Milliseconds(-1234),
-              Trunc(-d, unit_sign * absl::Milliseconds(1)));
-    EXPECT_EQ(absl::Seconds(-1), Trunc(-d, unit_sign * absl::Seconds(1)));
-    EXPECT_EQ(-inf, Trunc(-inf, unit_sign * absl::Seconds(1)));
-  }
-}
-
-TEST(Duration, Flooring) {
-  const absl::Duration d = absl::Nanoseconds(1234567890);
-  const absl::Duration inf = absl::InfiniteDuration();
-  for (int unit_sign : {1, -1}) {  // sign shouldn't matter
-    EXPECT_EQ(absl::Nanoseconds(1234567890),
-              absl::Floor(d, unit_sign * absl::Nanoseconds(1)));
-    EXPECT_EQ(absl::Microseconds(1234567),
-              absl::Floor(d, unit_sign * absl::Microseconds(1)));
-    EXPECT_EQ(absl::Milliseconds(1234),
-              absl::Floor(d, unit_sign * absl::Milliseconds(1)));
-    EXPECT_EQ(absl::Seconds(1), absl::Floor(d, unit_sign * absl::Seconds(1)));
-    EXPECT_EQ(inf, absl::Floor(inf, unit_sign * absl::Seconds(1)));
-
-    EXPECT_EQ(absl::Nanoseconds(-1234567890),
-              absl::Floor(-d, unit_sign * absl::Nanoseconds(1)));
-    EXPECT_EQ(absl::Microseconds(-1234568),
-              absl::Floor(-d, unit_sign * absl::Microseconds(1)));
-    EXPECT_EQ(absl::Milliseconds(-1235),
-              absl::Floor(-d, unit_sign * absl::Milliseconds(1)));
-    EXPECT_EQ(absl::Seconds(-2), absl::Floor(-d, unit_sign * absl::Seconds(1)));
-    EXPECT_EQ(-inf, absl::Floor(-inf, unit_sign * absl::Seconds(1)));
-  }
-}
-
-TEST(Duration, Ceiling) {
-  const absl::Duration d = absl::Nanoseconds(1234567890);
-  const absl::Duration inf = absl::InfiniteDuration();
-  for (int unit_sign : {1, -1}) {  // // sign shouldn't matter
-    EXPECT_EQ(absl::Nanoseconds(1234567890),
-              absl::Ceil(d, unit_sign * absl::Nanoseconds(1)));
-    EXPECT_EQ(absl::Microseconds(1234568),
-              absl::Ceil(d, unit_sign * absl::Microseconds(1)));
-    EXPECT_EQ(absl::Milliseconds(1235),
-              absl::Ceil(d, unit_sign * absl::Milliseconds(1)));
-    EXPECT_EQ(absl::Seconds(2), absl::Ceil(d, unit_sign * absl::Seconds(1)));
-    EXPECT_EQ(inf, absl::Ceil(inf, unit_sign * absl::Seconds(1)));
-
-    EXPECT_EQ(absl::Nanoseconds(-1234567890),
-              absl::Ceil(-d, unit_sign * absl::Nanoseconds(1)));
-    EXPECT_EQ(absl::Microseconds(-1234567),
-              absl::Ceil(-d, unit_sign * absl::Microseconds(1)));
-    EXPECT_EQ(absl::Milliseconds(-1234),
-              absl::Ceil(-d, unit_sign * absl::Milliseconds(1)));
-    EXPECT_EQ(absl::Seconds(-1), absl::Ceil(-d, unit_sign * absl::Seconds(1)));
-    EXPECT_EQ(-inf, absl::Ceil(-inf, unit_sign * absl::Seconds(1)));
-  }
-}
-
-TEST(Duration, RoundTripUnits) {
-  const int kRange = 100000;
-
-#define ROUND_TRIP_UNIT(U, LOW, HIGH)          \
-  do {                                         \
-    for (int64_t i = LOW; i < HIGH; ++i) {     \
-      absl::Duration d = absl::U(i);           \
-      if (d == absl::InfiniteDuration())       \
-        EXPECT_EQ(kint64max, d / absl::U(1));  \
-      else if (d == -absl::InfiniteDuration()) \
-        EXPECT_EQ(kint64min, d / absl::U(1));  \
-      else                                     \
-        EXPECT_EQ(i, absl::U(i) / absl::U(1)); \
-    }                                          \
-  } while (0)
-
-  ROUND_TRIP_UNIT(Nanoseconds, kint64min, kint64min + kRange);
-  ROUND_TRIP_UNIT(Nanoseconds, -kRange, kRange);
-  ROUND_TRIP_UNIT(Nanoseconds, kint64max - kRange, kint64max);
-
-  ROUND_TRIP_UNIT(Microseconds, kint64min, kint64min + kRange);
-  ROUND_TRIP_UNIT(Microseconds, -kRange, kRange);
-  ROUND_TRIP_UNIT(Microseconds, kint64max - kRange, kint64max);
-
-  ROUND_TRIP_UNIT(Milliseconds, kint64min, kint64min + kRange);
-  ROUND_TRIP_UNIT(Milliseconds, -kRange, kRange);
-  ROUND_TRIP_UNIT(Milliseconds, kint64max - kRange, kint64max);
-
-  ROUND_TRIP_UNIT(Seconds, kint64min, kint64min + kRange);
-  ROUND_TRIP_UNIT(Seconds, -kRange, kRange);
-  ROUND_TRIP_UNIT(Seconds, kint64max - kRange, kint64max);
-
-  ROUND_TRIP_UNIT(Minutes, kint64min / 60, kint64min / 60 + kRange);
-  ROUND_TRIP_UNIT(Minutes, -kRange, kRange);
-  ROUND_TRIP_UNIT(Minutes, kint64max / 60 - kRange, kint64max / 60);
-
-  ROUND_TRIP_UNIT(Hours, kint64min / 3600, kint64min / 3600 + kRange);
-  ROUND_TRIP_UNIT(Hours, -kRange, kRange);
-  ROUND_TRIP_UNIT(Hours, kint64max / 3600 - kRange, kint64max / 3600);
-
-#undef ROUND_TRIP_UNIT
-}
-
-TEST(Duration, TruncConversions) {
-  // Tests ToTimespec()/DurationFromTimespec()
-  const struct {
-    absl::Duration d;
-    timespec ts;
-  } to_ts[] = {
-      {absl::Seconds(1) + absl::Nanoseconds(1), {1, 1}},
-      {absl::Seconds(1) + absl::Nanoseconds(1) / 2, {1, 0}},
-      {absl::Seconds(1) + absl::Nanoseconds(0), {1, 0}},
-      {absl::Seconds(0) + absl::Nanoseconds(0), {0, 0}},
-      {absl::Seconds(0) - absl::Nanoseconds(1) / 2, {0, 0}},
-      {absl::Seconds(0) - absl::Nanoseconds(1), {-1, 999999999}},
-      {absl::Seconds(-1) + absl::Nanoseconds(1), {-1, 1}},
-      {absl::Seconds(-1) + absl::Nanoseconds(1) / 2, {-1, 1}},
-      {absl::Seconds(-1) + absl::Nanoseconds(0), {-1, 0}},
-      {absl::Seconds(-1) - absl::Nanoseconds(1) / 2, {-1, 0}},
-  };
-  for (const auto& test : to_ts) {
-    EXPECT_THAT(absl::ToTimespec(test.d), TimespecMatcher(test.ts));
-  }
-  const struct {
-    timespec ts;
-    absl::Duration d;
-  } from_ts[] = {
-      {{1, 1}, absl::Seconds(1) + absl::Nanoseconds(1)},
-      {{1, 0}, absl::Seconds(1) + absl::Nanoseconds(0)},
-      {{0, 0}, absl::Seconds(0) + absl::Nanoseconds(0)},
-      {{0, -1}, absl::Seconds(0) - absl::Nanoseconds(1)},
-      {{-1, 999999999}, absl::Seconds(0) - absl::Nanoseconds(1)},
-      {{-1, 1}, absl::Seconds(-1) + absl::Nanoseconds(1)},
-      {{-1, 0}, absl::Seconds(-1) + absl::Nanoseconds(0)},
-      {{-1, -1}, absl::Seconds(-1) - absl::Nanoseconds(1)},
-      {{-2, 999999999}, absl::Seconds(-1) - absl::Nanoseconds(1)},
-  };
-  for (const auto& test : from_ts) {
-    EXPECT_EQ(test.d, absl::DurationFromTimespec(test.ts));
-  }
-
-  // Tests ToTimeval()/DurationFromTimeval() (same as timespec above)
-  const struct {
-    absl::Duration d;
-    timeval tv;
-  } to_tv[] = {
-      {absl::Seconds(1) + absl::Microseconds(1), {1, 1}},
-      {absl::Seconds(1) + absl::Microseconds(1) / 2, {1, 0}},
-      {absl::Seconds(1) + absl::Microseconds(0), {1, 0}},
-      {absl::Seconds(0) + absl::Microseconds(0), {0, 0}},
-      {absl::Seconds(0) - absl::Microseconds(1) / 2, {0, 0}},
-      {absl::Seconds(0) - absl::Microseconds(1), {-1, 999999}},
-      {absl::Seconds(-1) + absl::Microseconds(1), {-1, 1}},
-      {absl::Seconds(-1) + absl::Microseconds(1) / 2, {-1, 1}},
-      {absl::Seconds(-1) + absl::Microseconds(0), {-1, 0}},
-      {absl::Seconds(-1) - absl::Microseconds(1) / 2, {-1, 0}},
-  };
-  for (const auto& test : to_tv) {
-    EXPECT_THAT(absl::ToTimeval(test.d), TimevalMatcher(test.tv));
-  }
-  const struct {
-    timeval tv;
-    absl::Duration d;
-  } from_tv[] = {
-      {{1, 1}, absl::Seconds(1) + absl::Microseconds(1)},
-      {{1, 0}, absl::Seconds(1) + absl::Microseconds(0)},
-      {{0, 0}, absl::Seconds(0) + absl::Microseconds(0)},
-      {{0, -1}, absl::Seconds(0) - absl::Microseconds(1)},
-      {{-1, 999999}, absl::Seconds(0) - absl::Microseconds(1)},
-      {{-1, 1}, absl::Seconds(-1) + absl::Microseconds(1)},
-      {{-1, 0}, absl::Seconds(-1) + absl::Microseconds(0)},
-      {{-1, -1}, absl::Seconds(-1) - absl::Microseconds(1)},
-      {{-2, 999999}, absl::Seconds(-1) - absl::Microseconds(1)},
-  };
-  for (const auto& test : from_tv) {
-    EXPECT_EQ(test.d, absl::DurationFromTimeval(test.tv));
-  }
-}
-
-TEST(Duration, SmallConversions) {
-  // Special tests for conversions of small durations.
-
-  EXPECT_EQ(absl::ZeroDuration(), absl::Seconds(0));
-  // TODO(bww): Is the next one OK?
-  EXPECT_EQ(absl::ZeroDuration(), absl::Seconds(0.124999999e-9));
-  EXPECT_EQ(absl::Nanoseconds(1) / 4, absl::Seconds(0.125e-9));
-  EXPECT_EQ(absl::Nanoseconds(1) / 4, absl::Seconds(0.250e-9));
-  EXPECT_EQ(absl::Nanoseconds(1) / 2, absl::Seconds(0.375e-9));
-  EXPECT_EQ(absl::Nanoseconds(1) / 2, absl::Seconds(0.500e-9));
-  EXPECT_EQ(absl::Nanoseconds(3) / 4, absl::Seconds(0.625e-9));
-  EXPECT_EQ(absl::Nanoseconds(3) / 4, absl::Seconds(0.750e-9));
-  EXPECT_EQ(absl::Nanoseconds(1), absl::Seconds(0.875e-9));
-  EXPECT_EQ(absl::Nanoseconds(1), absl::Seconds(1.000e-9));
-
-  EXPECT_EQ(absl::ZeroDuration(), absl::Seconds(-0.124999999e-9));
-  EXPECT_EQ(-absl::Nanoseconds(1) / 4, absl::Seconds(-0.125e-9));
-  EXPECT_EQ(-absl::Nanoseconds(1) / 4, absl::Seconds(-0.250e-9));
-  EXPECT_EQ(-absl::Nanoseconds(1) / 2, absl::Seconds(-0.375e-9));
-  EXPECT_EQ(-absl::Nanoseconds(1) / 2, absl::Seconds(-0.500e-9));
-  EXPECT_EQ(-absl::Nanoseconds(3) / 4, absl::Seconds(-0.625e-9));
-  EXPECT_EQ(-absl::Nanoseconds(3) / 4, absl::Seconds(-0.750e-9));
-  EXPECT_EQ(-absl::Nanoseconds(1), absl::Seconds(-0.875e-9));
-  EXPECT_EQ(-absl::Nanoseconds(1), absl::Seconds(-1.000e-9));
-
-  timespec ts;
-  ts.tv_sec = 0;
-  ts.tv_nsec = 0;
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(0)), TimespecMatcher(ts));
-  // TODO(bww): Are the next three OK?
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(1) / 4), TimespecMatcher(ts));
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(2) / 4), TimespecMatcher(ts));
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(3) / 4), TimespecMatcher(ts));
-  ts.tv_nsec = 1;
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(4) / 4), TimespecMatcher(ts));
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(5) / 4), TimespecMatcher(ts));
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(6) / 4), TimespecMatcher(ts));
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(7) / 4), TimespecMatcher(ts));
-  ts.tv_nsec = 2;
-  EXPECT_THAT(ToTimespec(absl::Nanoseconds(8) / 4), TimespecMatcher(ts));
-
-  timeval tv;
-  tv.tv_sec = 0;
-  tv.tv_usec = 0;
-  EXPECT_THAT(ToTimeval(absl::Nanoseconds(0)), TimevalMatcher(tv));
-  // TODO(bww): Is the next one OK?
-  EXPECT_THAT(ToTimeval(absl::Nanoseconds(999)), TimevalMatcher(tv));
-  tv.tv_usec = 1;
-  EXPECT_THAT(ToTimeval(absl::Nanoseconds(1000)), TimevalMatcher(tv));
-  EXPECT_THAT(ToTimeval(absl::Nanoseconds(1999)), TimevalMatcher(tv));
-  tv.tv_usec = 2;
-  EXPECT_THAT(ToTimeval(absl::Nanoseconds(2000)), TimevalMatcher(tv));
-}
-
-void VerifySameAsMul(double time_as_seconds, int* const misses) {
-  auto direct_seconds = absl::Seconds(time_as_seconds);
-  auto mul_by_one_second = time_as_seconds * absl::Seconds(1);
-  if (direct_seconds != mul_by_one_second) {
-    if (*misses > 10) return;
-    ASSERT_LE(++(*misses), 10) << "Too many errors, not reporting more.";
-    EXPECT_EQ(direct_seconds, mul_by_one_second)
-        << "given double time_as_seconds = " << std::setprecision(17)
-        << time_as_seconds;
-  }
-}
-
-// For a variety of interesting durations, we find the exact point
-// where one double converts to that duration, and the very next double
-// converts to the next duration.  For both of those points, verify that
-// Seconds(point) returns the same duration as point * Seconds(1.0)
-TEST(Duration, ToDoubleSecondsCheckEdgeCases) {
-  constexpr uint32_t kTicksPerSecond = absl::time_internal::kTicksPerSecond;
-  constexpr auto duration_tick = absl::time_internal::MakeDuration(0, 1u);
-  int misses = 0;
-  for (int64_t seconds = 0; seconds < 99; ++seconds) {
-    uint32_t tick_vals[] = {0, +999, +999999, +999999999, kTicksPerSecond - 1,
-                            0, 1000, 1000000, 1000000000, kTicksPerSecond,
-                            1, 1001, 1000001, 1000000001, kTicksPerSecond + 1,
-                            2, 1002, 1000002, 1000000002, kTicksPerSecond + 2,
-                            3, 1003, 1000003, 1000000003, kTicksPerSecond + 3,
-                            4, 1004, 1000004, 1000000004, kTicksPerSecond + 4,
-                            5, 6,    7,       8,          9};
-    for (uint32_t ticks : tick_vals) {
-      absl::Duration s_plus_t = absl::Seconds(seconds) + ticks * duration_tick;
-      for (absl::Duration d : {s_plus_t, -s_plus_t}) {
-        absl::Duration after_d = d + duration_tick;
-        EXPECT_NE(d, after_d);
-        EXPECT_EQ(after_d - d, duration_tick);
-
-        double low_edge = ToDoubleSeconds(d);
-        EXPECT_EQ(d, absl::Seconds(low_edge));
-
-        double high_edge = ToDoubleSeconds(after_d);
-        EXPECT_EQ(after_d, absl::Seconds(high_edge));
-
-        for (;;) {
-          double midpoint = low_edge + (high_edge - low_edge) / 2;
-          if (midpoint == low_edge || midpoint == high_edge) break;
-          absl::Duration mid_duration = absl::Seconds(midpoint);
-          if (mid_duration == d) {
-            low_edge = midpoint;
-          } else {
-            EXPECT_EQ(mid_duration, after_d);
-            high_edge = midpoint;
-          }
-        }
-        // Now low_edge is the highest double that converts to Duration d,
-        // and high_edge is the lowest double that converts to Duration after_d.
-        VerifySameAsMul(low_edge, &misses);
-        VerifySameAsMul(high_edge, &misses);
-      }
-    }
-  }
-}
-
-TEST(Duration, ToDoubleSecondsCheckRandom) {
-  std::random_device rd;
-  std::seed_seq seed({rd(), rd(), rd(), rd(), rd(), rd(), rd(), rd()});
-  std::mt19937_64 gen(seed);
-  // We want doubles distributed from 1/8ns up to 2^63, where
-  // as many values are tested from 1ns to 2ns as from 1sec to 2sec,
-  // so even distribute along a log-scale of those values, and
-  // exponentiate before using them.  (9.223377e+18 is just slightly
-  // out of bounds for absl::Duration.)
-  std::uniform_real_distribution<double> uniform(std::log(0.125e-9),
-                                                 std::log(9.223377e+18));
-  int misses = 0;
-  for (int i = 0; i < 1000000; ++i) {
-    double d = std::exp(uniform(gen));
-    VerifySameAsMul(d, &misses);
-    VerifySameAsMul(-d, &misses);
-  }
-}
-
-TEST(Duration, ConversionSaturation) {
-  absl::Duration d;
-
-  const auto max_timeval_sec =
-      std::numeric_limits<decltype(timeval::tv_sec)>::max();
-  const auto min_timeval_sec =
-      std::numeric_limits<decltype(timeval::tv_sec)>::min();
-  timeval tv;
-  tv.tv_sec = max_timeval_sec;
-  tv.tv_usec = 999998;
-  d = absl::DurationFromTimeval(tv);
-  tv = ToTimeval(d);
-  EXPECT_EQ(max_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(999998, tv.tv_usec);
-  d += absl::Microseconds(1);
-  tv = ToTimeval(d);
-  EXPECT_EQ(max_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(999999, tv.tv_usec);
-  d += absl::Microseconds(1);  // no effect
-  tv = ToTimeval(d);
-  EXPECT_EQ(max_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(999999, tv.tv_usec);
-
-  tv.tv_sec = min_timeval_sec;
-  tv.tv_usec = 1;
-  d = absl::DurationFromTimeval(tv);
-  tv = ToTimeval(d);
-  EXPECT_EQ(min_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(1, tv.tv_usec);
-  d -= absl::Microseconds(1);
-  tv = ToTimeval(d);
-  EXPECT_EQ(min_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(0, tv.tv_usec);
-  d -= absl::Microseconds(1);  // no effect
-  tv = ToTimeval(d);
-  EXPECT_EQ(min_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(0, tv.tv_usec);
-
-  const auto max_timespec_sec =
-      std::numeric_limits<decltype(timespec::tv_sec)>::max();
-  const auto min_timespec_sec =
-      std::numeric_limits<decltype(timespec::tv_sec)>::min();
-  timespec ts;
-  ts.tv_sec = max_timespec_sec;
-  ts.tv_nsec = 999999998;
-  d = absl::DurationFromTimespec(ts);
-  ts = absl::ToTimespec(d);
-  EXPECT_EQ(max_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(999999998, ts.tv_nsec);
-  d += absl::Nanoseconds(1);
-  ts = absl::ToTimespec(d);
-  EXPECT_EQ(max_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(999999999, ts.tv_nsec);
-  d += absl::Nanoseconds(1);  // no effect
-  ts = absl::ToTimespec(d);
-  EXPECT_EQ(max_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(999999999, ts.tv_nsec);
-
-  ts.tv_sec = min_timespec_sec;
-  ts.tv_nsec = 1;
-  d = absl::DurationFromTimespec(ts);
-  ts = absl::ToTimespec(d);
-  EXPECT_EQ(min_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(1, ts.tv_nsec);
-  d -= absl::Nanoseconds(1);
-  ts = absl::ToTimespec(d);
-  EXPECT_EQ(min_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(0, ts.tv_nsec);
-  d -= absl::Nanoseconds(1);  // no effect
-  ts = absl::ToTimespec(d);
-  EXPECT_EQ(min_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(0, ts.tv_nsec);
-}
-
-TEST(Duration, FormatDuration) {
-  // Example from Go's docs.
-  EXPECT_EQ("72h3m0.5s",
-            absl::FormatDuration(absl::Hours(72) + absl::Minutes(3) +
-                                 absl::Milliseconds(500)));
-  // Go's largest time: 2540400h10m10.000000000s
-  EXPECT_EQ("2540400h10m10s",
-            absl::FormatDuration(absl::Hours(2540400) + absl::Minutes(10) +
-                                 absl::Seconds(10)));
-
-  EXPECT_EQ("0", absl::FormatDuration(absl::ZeroDuration()));
-  EXPECT_EQ("0", absl::FormatDuration(absl::Seconds(0)));
-  EXPECT_EQ("0", absl::FormatDuration(absl::Nanoseconds(0)));
-
-  EXPECT_EQ("1ns", absl::FormatDuration(absl::Nanoseconds(1)));
-  EXPECT_EQ("1us", absl::FormatDuration(absl::Microseconds(1)));
-  EXPECT_EQ("1ms", absl::FormatDuration(absl::Milliseconds(1)));
-  EXPECT_EQ("1s", absl::FormatDuration(absl::Seconds(1)));
-  EXPECT_EQ("1m", absl::FormatDuration(absl::Minutes(1)));
-  EXPECT_EQ("1h", absl::FormatDuration(absl::Hours(1)));
-
-  EXPECT_EQ("1h1m", absl::FormatDuration(absl::Hours(1) + absl::Minutes(1)));
-  EXPECT_EQ("1h1s", absl::FormatDuration(absl::Hours(1) + absl::Seconds(1)));
-  EXPECT_EQ("1m1s", absl::FormatDuration(absl::Minutes(1) + absl::Seconds(1)));
-
-  EXPECT_EQ("1h0.25s",
-            absl::FormatDuration(absl::Hours(1) + absl::Milliseconds(250)));
-  EXPECT_EQ("1m0.25s",
-            absl::FormatDuration(absl::Minutes(1) + absl::Milliseconds(250)));
-  EXPECT_EQ("1h1m0.25s",
-            absl::FormatDuration(absl::Hours(1) + absl::Minutes(1) +
-                                 absl::Milliseconds(250)));
-  EXPECT_EQ("1h0.0005s",
-            absl::FormatDuration(absl::Hours(1) + absl::Microseconds(500)));
-  EXPECT_EQ("1h0.0000005s",
-            absl::FormatDuration(absl::Hours(1) + absl::Nanoseconds(500)));
-
-  // Subsecond special case.
-  EXPECT_EQ("1.5ns", absl::FormatDuration(absl::Nanoseconds(1) +
-                                          absl::Nanoseconds(1) / 2));
-  EXPECT_EQ("1.25ns", absl::FormatDuration(absl::Nanoseconds(1) +
-                                           absl::Nanoseconds(1) / 4));
-  EXPECT_EQ("1ns", absl::FormatDuration(absl::Nanoseconds(1) +
-                                        absl::Nanoseconds(1) / 9));
-  EXPECT_EQ("1.2us", absl::FormatDuration(absl::Microseconds(1) +
-                                          absl::Nanoseconds(200)));
-  EXPECT_EQ("1.2ms", absl::FormatDuration(absl::Milliseconds(1) +
-                                          absl::Microseconds(200)));
-  EXPECT_EQ("1.0002ms", absl::FormatDuration(absl::Milliseconds(1) +
-                                             absl::Nanoseconds(200)));
-  EXPECT_EQ("1.00001ms", absl::FormatDuration(absl::Milliseconds(1) +
-                                              absl::Nanoseconds(10)));
-  EXPECT_EQ("1.000001ms",
-            absl::FormatDuration(absl::Milliseconds(1) + absl::Nanoseconds(1)));
-
-  // Negative durations.
-  EXPECT_EQ("-1ns", absl::FormatDuration(absl::Nanoseconds(-1)));
-  EXPECT_EQ("-1us", absl::FormatDuration(absl::Microseconds(-1)));
-  EXPECT_EQ("-1ms", absl::FormatDuration(absl::Milliseconds(-1)));
-  EXPECT_EQ("-1s", absl::FormatDuration(absl::Seconds(-1)));
-  EXPECT_EQ("-1m", absl::FormatDuration(absl::Minutes(-1)));
-  EXPECT_EQ("-1h", absl::FormatDuration(absl::Hours(-1)));
-
-  EXPECT_EQ("-1h1m",
-            absl::FormatDuration(-(absl::Hours(1) + absl::Minutes(1))));
-  EXPECT_EQ("-1h1s",
-            absl::FormatDuration(-(absl::Hours(1) + absl::Seconds(1))));
-  EXPECT_EQ("-1m1s",
-            absl::FormatDuration(-(absl::Minutes(1) + absl::Seconds(1))));
-
-  EXPECT_EQ("-1ns", absl::FormatDuration(absl::Nanoseconds(-1)));
-  EXPECT_EQ("-1.2us", absl::FormatDuration(
-                          -(absl::Microseconds(1) + absl::Nanoseconds(200))));
-  EXPECT_EQ("-1.2ms", absl::FormatDuration(
-                          -(absl::Milliseconds(1) + absl::Microseconds(200))));
-  EXPECT_EQ("-1.0002ms", absl::FormatDuration(-(absl::Milliseconds(1) +
-                                                absl::Nanoseconds(200))));
-  EXPECT_EQ("-1.00001ms", absl::FormatDuration(-(absl::Milliseconds(1) +
-                                                 absl::Nanoseconds(10))));
-  EXPECT_EQ("-1.000001ms", absl::FormatDuration(-(absl::Milliseconds(1) +
-                                                  absl::Nanoseconds(1))));
-
-  //
-  // Interesting corner cases.
-  //
-
-  const absl::Duration qns = absl::Nanoseconds(1) / 4;
-  const absl::Duration max_dur =
-      absl::Seconds(kint64max) + (absl::Seconds(1) - qns);
-  const absl::Duration min_dur = absl::Seconds(kint64min);
-
-  EXPECT_EQ("0.25ns", absl::FormatDuration(qns));
-  EXPECT_EQ("-0.25ns", absl::FormatDuration(-qns));
-  EXPECT_EQ("2562047788015215h30m7.99999999975s",
-            absl::FormatDuration(max_dur));
-  EXPECT_EQ("-2562047788015215h30m8s", absl::FormatDuration(min_dur));
-
-  // Tests printing full precision from units that print using FDivDuration
-  EXPECT_EQ("55.00000000025s", absl::FormatDuration(absl::Seconds(55) + qns));
-  EXPECT_EQ("55.00000025ms",
-            absl::FormatDuration(absl::Milliseconds(55) + qns));
-  EXPECT_EQ("55.00025us", absl::FormatDuration(absl::Microseconds(55) + qns));
-  EXPECT_EQ("55.25ns", absl::FormatDuration(absl::Nanoseconds(55) + qns));
-
-  // Formatting infinity
-  EXPECT_EQ("inf", absl::FormatDuration(absl::InfiniteDuration()));
-  EXPECT_EQ("-inf", absl::FormatDuration(-absl::InfiniteDuration()));
-
-  // Formatting approximately +/- 100 billion years
-  const absl::Duration huge_range = ApproxYears(100000000000);
-  EXPECT_EQ("876000000000000h", absl::FormatDuration(huge_range));
-  EXPECT_EQ("-876000000000000h", absl::FormatDuration(-huge_range));
-
-  EXPECT_EQ("876000000000000h0.999999999s",
-            absl::FormatDuration(huge_range +
-                                 (absl::Seconds(1) - absl::Nanoseconds(1))));
-  EXPECT_EQ("876000000000000h0.9999999995s",
-            absl::FormatDuration(
-                huge_range + (absl::Seconds(1) - absl::Nanoseconds(1) / 2)));
-  EXPECT_EQ("876000000000000h0.99999999975s",
-            absl::FormatDuration(
-                huge_range + (absl::Seconds(1) - absl::Nanoseconds(1) / 4)));
-
-  EXPECT_EQ("-876000000000000h0.999999999s",
-            absl::FormatDuration(-huge_range -
-                                 (absl::Seconds(1) - absl::Nanoseconds(1))));
-  EXPECT_EQ("-876000000000000h0.9999999995s",
-            absl::FormatDuration(
-                -huge_range - (absl::Seconds(1) - absl::Nanoseconds(1) / 2)));
-  EXPECT_EQ("-876000000000000h0.99999999975s",
-            absl::FormatDuration(
-                -huge_range - (absl::Seconds(1) - absl::Nanoseconds(1) / 4)));
-}
-
-TEST(Duration, ParseDuration) {
-  absl::Duration d;
-
-  // No specified unit. Should only work for zero and infinity.
-  EXPECT_TRUE(absl::ParseDuration("0", &d));
-  EXPECT_EQ(absl::ZeroDuration(), d);
-  EXPECT_TRUE(absl::ParseDuration("+0", &d));
-  EXPECT_EQ(absl::ZeroDuration(), d);
-  EXPECT_TRUE(absl::ParseDuration("-0", &d));
-  EXPECT_EQ(absl::ZeroDuration(), d);
-
-  EXPECT_TRUE(absl::ParseDuration("inf", &d));
-  EXPECT_EQ(absl::InfiniteDuration(), d);
-  EXPECT_TRUE(absl::ParseDuration("+inf", &d));
-  EXPECT_EQ(absl::InfiniteDuration(), d);
-  EXPECT_TRUE(absl::ParseDuration("-inf", &d));
-  EXPECT_EQ(-absl::InfiniteDuration(), d);
-  EXPECT_FALSE(absl::ParseDuration("infBlah", &d));
-
-  // Illegal input forms.
-  EXPECT_FALSE(absl::ParseDuration("", &d));
-  EXPECT_FALSE(absl::ParseDuration("0.0", &d));
-  EXPECT_FALSE(absl::ParseDuration(".0", &d));
-  EXPECT_FALSE(absl::ParseDuration(".", &d));
-  EXPECT_FALSE(absl::ParseDuration("01", &d));
-  EXPECT_FALSE(absl::ParseDuration("1", &d));
-  EXPECT_FALSE(absl::ParseDuration("-1", &d));
-  EXPECT_FALSE(absl::ParseDuration("2", &d));
-  EXPECT_FALSE(absl::ParseDuration("2 s", &d));
-  EXPECT_FALSE(absl::ParseDuration(".s", &d));
-  EXPECT_FALSE(absl::ParseDuration("-.s", &d));
-  EXPECT_FALSE(absl::ParseDuration("s", &d));
-  EXPECT_FALSE(absl::ParseDuration(" 2s", &d));
-  EXPECT_FALSE(absl::ParseDuration("2s ", &d));
-  EXPECT_FALSE(absl::ParseDuration(" 2s ", &d));
-  EXPECT_FALSE(absl::ParseDuration("2mt", &d));
-  EXPECT_FALSE(absl::ParseDuration("1e3s", &d));
-
-  // One unit type.
-  EXPECT_TRUE(absl::ParseDuration("1ns", &d));
-  EXPECT_EQ(absl::Nanoseconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1us", &d));
-  EXPECT_EQ(absl::Microseconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1ms", &d));
-  EXPECT_EQ(absl::Milliseconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1s", &d));
-  EXPECT_EQ(absl::Seconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("2m", &d));
-  EXPECT_EQ(absl::Minutes(2), d);
-  EXPECT_TRUE(absl::ParseDuration("2h", &d));
-  EXPECT_EQ(absl::Hours(2), d);
-
-  // Huge counts of a unit.
-  EXPECT_TRUE(absl::ParseDuration("9223372036854775807us", &d));
-  EXPECT_EQ(absl::Microseconds(9223372036854775807), d);
-  EXPECT_TRUE(absl::ParseDuration("-9223372036854775807us", &d));
-  EXPECT_EQ(absl::Microseconds(-9223372036854775807), d);
-
-  // Multiple units.
-  EXPECT_TRUE(absl::ParseDuration("2h3m4s", &d));
-  EXPECT_EQ(absl::Hours(2) + absl::Minutes(3) + absl::Seconds(4), d);
-  EXPECT_TRUE(absl::ParseDuration("3m4s5us", &d));
-  EXPECT_EQ(absl::Minutes(3) + absl::Seconds(4) + absl::Microseconds(5), d);
-  EXPECT_TRUE(absl::ParseDuration("2h3m4s5ms6us7ns", &d));
-  EXPECT_EQ(absl::Hours(2) + absl::Minutes(3) + absl::Seconds(4) +
-                absl::Milliseconds(5) + absl::Microseconds(6) +
-                absl::Nanoseconds(7),
-            d);
-
-  // Multiple units out of order.
-  EXPECT_TRUE(absl::ParseDuration("2us3m4s5h", &d));
-  EXPECT_EQ(absl::Hours(5) + absl::Minutes(3) + absl::Seconds(4) +
-                absl::Microseconds(2),
-            d);
-
-  // Fractional values of units.
-  EXPECT_TRUE(absl::ParseDuration("1.5ns", &d));
-  EXPECT_EQ(1.5 * absl::Nanoseconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1.5us", &d));
-  EXPECT_EQ(1.5 * absl::Microseconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1.5ms", &d));
-  EXPECT_EQ(1.5 * absl::Milliseconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1.5s", &d));
-  EXPECT_EQ(1.5 * absl::Seconds(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1.5m", &d));
-  EXPECT_EQ(1.5 * absl::Minutes(1), d);
-  EXPECT_TRUE(absl::ParseDuration("1.5h", &d));
-  EXPECT_EQ(1.5 * absl::Hours(1), d);
-
-  // Huge fractional counts of a unit.
-  EXPECT_TRUE(absl::ParseDuration("0.4294967295s", &d));
-  EXPECT_EQ(absl::Nanoseconds(429496729) + absl::Nanoseconds(1) / 2, d);
-  EXPECT_TRUE(absl::ParseDuration("0.429496729501234567890123456789s", &d));
-  EXPECT_EQ(absl::Nanoseconds(429496729) + absl::Nanoseconds(1) / 2, d);
-
-  // Negative durations.
-  EXPECT_TRUE(absl::ParseDuration("-1s", &d));
-  EXPECT_EQ(absl::Seconds(-1), d);
-  EXPECT_TRUE(absl::ParseDuration("-1m", &d));
-  EXPECT_EQ(absl::Minutes(-1), d);
-  EXPECT_TRUE(absl::ParseDuration("-1h", &d));
-  EXPECT_EQ(absl::Hours(-1), d);
-
-  EXPECT_TRUE(absl::ParseDuration("-1h2s", &d));
-  EXPECT_EQ(-(absl::Hours(1) + absl::Seconds(2)), d);
-  EXPECT_FALSE(absl::ParseDuration("1h-2s", &d));
-  EXPECT_FALSE(absl::ParseDuration("-1h-2s", &d));
-  EXPECT_FALSE(absl::ParseDuration("-1h -2s", &d));
-}
-
-TEST(Duration, FormatParseRoundTrip) {
-#define TEST_PARSE_ROUNDTRIP(d)                \
-  do {                                         \
-    std::string s = absl::FormatDuration(d);   \
-    absl::Duration dur;                        \
-    EXPECT_TRUE(absl::ParseDuration(s, &dur)); \
-    EXPECT_EQ(d, dur);                         \
-  } while (0)
-
-  TEST_PARSE_ROUNDTRIP(absl::Nanoseconds(1));
-  TEST_PARSE_ROUNDTRIP(absl::Microseconds(1));
-  TEST_PARSE_ROUNDTRIP(absl::Milliseconds(1));
-  TEST_PARSE_ROUNDTRIP(absl::Seconds(1));
-  TEST_PARSE_ROUNDTRIP(absl::Minutes(1));
-  TEST_PARSE_ROUNDTRIP(absl::Hours(1));
-  TEST_PARSE_ROUNDTRIP(absl::Hours(1) + absl::Nanoseconds(2));
-
-  TEST_PARSE_ROUNDTRIP(absl::Nanoseconds(-1));
-  TEST_PARSE_ROUNDTRIP(absl::Microseconds(-1));
-  TEST_PARSE_ROUNDTRIP(absl::Milliseconds(-1));
-  TEST_PARSE_ROUNDTRIP(absl::Seconds(-1));
-  TEST_PARSE_ROUNDTRIP(absl::Minutes(-1));
-  TEST_PARSE_ROUNDTRIP(absl::Hours(-1));
-
-  TEST_PARSE_ROUNDTRIP(absl::Hours(-1) + absl::Nanoseconds(2));
-  TEST_PARSE_ROUNDTRIP(absl::Hours(1) + absl::Nanoseconds(-2));
-  TEST_PARSE_ROUNDTRIP(absl::Hours(-1) + absl::Nanoseconds(-2));
-
-  TEST_PARSE_ROUNDTRIP(absl::Nanoseconds(1) +
-                       absl::Nanoseconds(1) / 4);  // 1.25ns
-
-  const absl::Duration huge_range = ApproxYears(100000000000);
-  TEST_PARSE_ROUNDTRIP(huge_range);
-  TEST_PARSE_ROUNDTRIP(huge_range + (absl::Seconds(1) - absl::Nanoseconds(1)));
-
-#undef TEST_PARSE_ROUNDTRIP
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/format.cc b/third_party/abseil/absl/time/format.cc
deleted file mode 100644
index 4005fb7..0000000
--- a/third_party/abseil/absl/time/format.cc
+++ /dev/null
@@ -1,160 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <string.h>
-
-#include <cctype>
-#include <cstdint>
-
-#include "absl/strings/match.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-#include "absl/time/time.h"
-
-namespace cctz = absl::time_internal::cctz;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-ABSL_DLL extern const char RFC3339_full[] = "%Y-%m-%d%ET%H:%M:%E*S%Ez";
-ABSL_DLL extern const char RFC3339_sec[] = "%Y-%m-%d%ET%H:%M:%S%Ez";
-
-ABSL_DLL extern const char RFC1123_full[] = "%a, %d %b %E4Y %H:%M:%S %z";
-ABSL_DLL extern const char RFC1123_no_wday[] = "%d %b %E4Y %H:%M:%S %z";
-
-namespace {
-
-const char kInfiniteFutureStr[] = "infinite-future";
-const char kInfinitePastStr[] = "infinite-past";
-
-struct cctz_parts {
-  cctz::time_point<cctz::seconds> sec;
-  cctz::detail::femtoseconds fem;
-};
-
-inline cctz::time_point<cctz::seconds> unix_epoch() {
-  return std::chrono::time_point_cast<cctz::seconds>(
-      std::chrono::system_clock::from_time_t(0));
-}
-
-// Splits a Time into seconds and femtoseconds, which can be used with CCTZ.
-// Requires that 't' is finite. See duration.cc for details about rep_hi and
-// rep_lo.
-cctz_parts Split(absl::Time t) {
-  const auto d = time_internal::ToUnixDuration(t);
-  const int64_t rep_hi = time_internal::GetRepHi(d);
-  const int64_t rep_lo = time_internal::GetRepLo(d);
-  const auto sec = unix_epoch() + cctz::seconds(rep_hi);
-  const auto fem = cctz::detail::femtoseconds(rep_lo * (1000 * 1000 / 4));
-  return {sec, fem};
-}
-
-// Joins the given seconds and femtoseconds into a Time. See duration.cc for
-// details about rep_hi and rep_lo.
-absl::Time Join(const cctz_parts& parts) {
-  const int64_t rep_hi = (parts.sec - unix_epoch()).count();
-  const uint32_t rep_lo = parts.fem.count() / (1000 * 1000 / 4);
-  const auto d = time_internal::MakeDuration(rep_hi, rep_lo);
-  return time_internal::FromUnixDuration(d);
-}
-
-}  // namespace
-
-std::string FormatTime(absl::string_view format, absl::Time t,
-                       absl::TimeZone tz) {
-  if (t == absl::InfiniteFuture()) return std::string(kInfiniteFutureStr);
-  if (t == absl::InfinitePast()) return std::string(kInfinitePastStr);
-  const auto parts = Split(t);
-  return cctz::detail::format(std::string(format), parts.sec, parts.fem,
-                              cctz::time_zone(tz));
-}
-
-std::string FormatTime(absl::Time t, absl::TimeZone tz) {
-  return FormatTime(RFC3339_full, t, tz);
-}
-
-std::string FormatTime(absl::Time t) {
-  return absl::FormatTime(RFC3339_full, t, absl::LocalTimeZone());
-}
-
-bool ParseTime(absl::string_view format, absl::string_view input,
-               absl::Time* time, std::string* err) {
-  return absl::ParseTime(format, input, absl::UTCTimeZone(), time, err);
-}
-
-// If the input string does not contain an explicit UTC offset, interpret
-// the fields with respect to the given TimeZone.
-bool ParseTime(absl::string_view format, absl::string_view input,
-               absl::TimeZone tz, absl::Time* time, std::string* err) {
-  auto strip_leading_space = [](absl::string_view* sv) {
-    while (!sv->empty()) {
-      if (!std::isspace(sv->front())) return;
-      sv->remove_prefix(1);
-    }
-  };
-
-  // Portable toolchains means we don't get nice constexpr here.
-  struct Literal {
-    const char* name;
-    size_t size;
-    absl::Time value;
-  };
-  static Literal literals[] = {
-      {kInfiniteFutureStr, strlen(kInfiniteFutureStr), InfiniteFuture()},
-      {kInfinitePastStr, strlen(kInfinitePastStr), InfinitePast()},
-  };
-  strip_leading_space(&input);
-  for (const auto& lit : literals) {
-    if (absl::StartsWith(input, absl::string_view(lit.name, lit.size))) {
-      absl::string_view tail = input;
-      tail.remove_prefix(lit.size);
-      strip_leading_space(&tail);
-      if (tail.empty()) {
-        *time = lit.value;
-        return true;
-      }
-    }
-  }
-
-  std::string error;
-  cctz_parts parts;
-  const bool b =
-      cctz::detail::parse(std::string(format), std::string(input),
-                          cctz::time_zone(tz), &parts.sec, &parts.fem, &error);
-  if (b) {
-    *time = Join(parts);
-  } else if (err != nullptr) {
-    *err = error;
-  }
-  return b;
-}
-
-// Functions required to support absl::Time flags.
-bool AbslParseFlag(absl::string_view text, absl::Time* t, std::string* error) {
-  return absl::ParseTime(RFC3339_full, text, absl::UTCTimeZone(), t, error);
-}
-
-std::string AbslUnparseFlag(absl::Time t) {
-  return absl::FormatTime(RFC3339_full, t, absl::UTCTimeZone());
-}
-bool ParseFlag(const std::string& text, absl::Time* t, std::string* error) {
-  return absl::ParseTime(RFC3339_full, text, absl::UTCTimeZone(), t, error);
-}
-
-std::string UnparseFlag(absl::Time t) {
-  return absl::FormatTime(RFC3339_full, t, absl::UTCTimeZone());
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/format_benchmark.cc b/third_party/abseil/absl/time/format_benchmark.cc
deleted file mode 100644
index 19e481d..0000000
--- a/third_party/abseil/absl/time/format_benchmark.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstddef>
-#include <string>
-
-#include "absl/time/internal/test_util.h"
-#include "absl/time/time.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-namespace {
-const char* const kFormats[] = {
-    absl::RFC1123_full,     // 0
-    absl::RFC1123_no_wday,  // 1
-    absl::RFC3339_full,     // 2
-    absl::RFC3339_sec,      // 3
-    "%Y-%m-%d%ET%H:%M:%S",  // 4
-    "%Y-%m-%d",             // 5
-};
-const int kNumFormats = sizeof(kFormats) / sizeof(kFormats[0]);
-}  // namespace
-
-void BM_Format_FormatTime(benchmark::State& state) {
-  const std::string fmt = kFormats[state.range(0)];
-  state.SetLabel(fmt);
-  const absl::TimeZone lax =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  const absl::Time t =
-      absl::FromCivil(absl::CivilSecond(1977, 6, 28, 9, 8, 7), lax) +
-      absl::Nanoseconds(1);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::FormatTime(fmt, t, lax).length());
-  }
-}
-BENCHMARK(BM_Format_FormatTime)->DenseRange(0, kNumFormats - 1);
-
-void BM_Format_ParseTime(benchmark::State& state) {
-  const std::string fmt = kFormats[state.range(0)];
-  state.SetLabel(fmt);
-  const absl::TimeZone lax =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  absl::Time t = absl::FromCivil(absl::CivilSecond(1977, 6, 28, 9, 8, 7), lax) +
-                 absl::Nanoseconds(1);
-  const std::string when = absl::FormatTime(fmt, t, lax);
-  std::string err;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ParseTime(fmt, when, lax, &t, &err));
-  }
-}
-BENCHMARK(BM_Format_ParseTime)->DenseRange(0, kNumFormats - 1);
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/format_test.cc b/third_party/abseil/absl/time/format_test.cc
deleted file mode 100644
index a9a1eb8..0000000
--- a/third_party/abseil/absl/time/format_test.cc
+++ /dev/null
@@ -1,441 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdint>
-#include <limits>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/time/internal/test_util.h"
-#include "absl/time/time.h"
-
-using testing::HasSubstr;
-
-namespace {
-
-// A helper that tests the given format specifier by itself, and with leading
-// and trailing characters.  For example: TestFormatSpecifier(t, "%a", "Thu").
-void TestFormatSpecifier(absl::Time t, absl::TimeZone tz,
-                         const std::string& fmt, const std::string& ans) {
-  EXPECT_EQ(ans, absl::FormatTime(fmt, t, tz));
-  EXPECT_EQ("xxx " + ans, absl::FormatTime("xxx " + fmt, t, tz));
-  EXPECT_EQ(ans + " yyy", absl::FormatTime(fmt + " yyy", t, tz));
-  EXPECT_EQ("xxx " + ans + " yyy",
-            absl::FormatTime("xxx " + fmt + " yyy", t, tz));
-}
-
-//
-// Testing FormatTime()
-//
-
-TEST(FormatTime, Basics) {
-  absl::TimeZone tz = absl::UTCTimeZone();
-  absl::Time t = absl::FromTimeT(0);
-
-  // Starts with a couple basic edge cases.
-  EXPECT_EQ("", absl::FormatTime("", t, tz));
-  EXPECT_EQ(" ", absl::FormatTime(" ", t, tz));
-  EXPECT_EQ("  ", absl::FormatTime("  ", t, tz));
-  EXPECT_EQ("xxx", absl::FormatTime("xxx", t, tz));
-  std::string big(128, 'x');
-  EXPECT_EQ(big, absl::FormatTime(big, t, tz));
-  // Cause the 1024-byte buffer to grow.
-  std::string bigger(100000, 'x');
-  EXPECT_EQ(bigger, absl::FormatTime(bigger, t, tz));
-
-  t += absl::Hours(13) + absl::Minutes(4) + absl::Seconds(5);
-  t += absl::Milliseconds(6) + absl::Microseconds(7) + absl::Nanoseconds(8);
-  EXPECT_EQ("1970-01-01", absl::FormatTime("%Y-%m-%d", t, tz));
-  EXPECT_EQ("13:04:05", absl::FormatTime("%H:%M:%S", t, tz));
-  EXPECT_EQ("13:04:05.006", absl::FormatTime("%H:%M:%E3S", t, tz));
-  EXPECT_EQ("13:04:05.006007", absl::FormatTime("%H:%M:%E6S", t, tz));
-  EXPECT_EQ("13:04:05.006007008", absl::FormatTime("%H:%M:%E9S", t, tz));
-}
-
-TEST(FormatTime, LocaleSpecific) {
-  const absl::TimeZone tz = absl::UTCTimeZone();
-  absl::Time t = absl::FromTimeT(0);
-
-  TestFormatSpecifier(t, tz, "%a", "Thu");
-  TestFormatSpecifier(t, tz, "%A", "Thursday");
-  TestFormatSpecifier(t, tz, "%b", "Jan");
-  TestFormatSpecifier(t, tz, "%B", "January");
-
-  // %c should at least produce the numeric year and time-of-day.
-  const std::string s =
-      absl::FormatTime("%c", absl::FromTimeT(0), absl::UTCTimeZone());
-  EXPECT_THAT(s, HasSubstr("1970"));
-  EXPECT_THAT(s, HasSubstr("00:00:00"));
-
-  TestFormatSpecifier(t, tz, "%p", "AM");
-  TestFormatSpecifier(t, tz, "%x", "01/01/70");
-  TestFormatSpecifier(t, tz, "%X", "00:00:00");
-}
-
-TEST(FormatTime, ExtendedSeconds) {
-  const absl::TimeZone tz = absl::UTCTimeZone();
-
-  // No subseconds.
-  absl::Time t = absl::FromTimeT(0) + absl::Seconds(5);
-  EXPECT_EQ("05", absl::FormatTime("%E*S", t, tz));
-  EXPECT_EQ("05.000000000000000", absl::FormatTime("%E15S", t, tz));
-
-  // With subseconds.
-  t += absl::Milliseconds(6) + absl::Microseconds(7) + absl::Nanoseconds(8);
-  EXPECT_EQ("05.006007008", absl::FormatTime("%E*S", t, tz));
-  EXPECT_EQ("05", absl::FormatTime("%E0S", t, tz));
-  EXPECT_EQ("05.006007008000000", absl::FormatTime("%E15S", t, tz));
-
-  // Times before the Unix epoch.
-  t = absl::FromUnixMicros(-1);
-  EXPECT_EQ("1969-12-31 23:59:59.999999",
-            absl::FormatTime("%Y-%m-%d %H:%M:%E*S", t, tz));
-
-  // Here is a "%E*S" case we got wrong for a while.  While the first
-  // instant below is correctly rendered as "...:07.333304", the second
-  // one used to appear as "...:07.33330499999999999".
-  t = absl::FromUnixMicros(1395024427333304);
-  EXPECT_EQ("2014-03-17 02:47:07.333304",
-            absl::FormatTime("%Y-%m-%d %H:%M:%E*S", t, tz));
-  t += absl::Microseconds(1);
-  EXPECT_EQ("2014-03-17 02:47:07.333305",
-            absl::FormatTime("%Y-%m-%d %H:%M:%E*S", t, tz));
-}
-
-TEST(FormatTime, RFC1123FormatPadsYear) {  // locale specific
-  absl::TimeZone tz = absl::UTCTimeZone();
-
-  // A year of 77 should be padded to 0077.
-  absl::Time t = absl::FromCivil(absl::CivilSecond(77, 6, 28, 9, 8, 7), tz);
-  EXPECT_EQ("Mon, 28 Jun 0077 09:08:07 +0000",
-            absl::FormatTime(absl::RFC1123_full, t, tz));
-  EXPECT_EQ("28 Jun 0077 09:08:07 +0000",
-            absl::FormatTime(absl::RFC1123_no_wday, t, tz));
-}
-
-TEST(FormatTime, InfiniteTime) {
-  absl::TimeZone tz = absl::time_internal::LoadTimeZone("America/Los_Angeles");
-
-  // The format and timezone are ignored.
-  EXPECT_EQ("infinite-future",
-            absl::FormatTime("%H:%M blah", absl::InfiniteFuture(), tz));
-  EXPECT_EQ("infinite-past",
-            absl::FormatTime("%H:%M blah", absl::InfinitePast(), tz));
-}
-
-//
-// Testing ParseTime()
-//
-
-TEST(ParseTime, Basics) {
-  absl::Time t = absl::FromTimeT(1234567890);
-  std::string err;
-
-  // Simple edge cases.
-  EXPECT_TRUE(absl::ParseTime("", "", &t, &err)) << err;
-  EXPECT_EQ(absl::UnixEpoch(), t);  // everything defaulted
-  EXPECT_TRUE(absl::ParseTime(" ", " ", &t, &err)) << err;
-  EXPECT_TRUE(absl::ParseTime("  ", "  ", &t, &err)) << err;
-  EXPECT_TRUE(absl::ParseTime("x", "x", &t, &err)) << err;
-  EXPECT_TRUE(absl::ParseTime("xxx", "xxx", &t, &err)) << err;
-
-  EXPECT_TRUE(absl::ParseTime("%Y-%m-%d %H:%M:%S %z",
-                              "2013-06-28 19:08:09 -0800", &t, &err))
-      << err;
-  const auto ci = absl::FixedTimeZone(-8 * 60 * 60).At(t);
-  EXPECT_EQ(absl::CivilSecond(2013, 6, 28, 19, 8, 9), ci.cs);
-  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
-}
-
-TEST(ParseTime, NullErrorString) {
-  absl::Time t;
-  EXPECT_FALSE(absl::ParseTime("%Q", "invalid format", &t, nullptr));
-  EXPECT_FALSE(absl::ParseTime("%H", "12 trailing data", &t, nullptr));
-  EXPECT_FALSE(
-      absl::ParseTime("%H out of range", "42 out of range", &t, nullptr));
-}
-
-TEST(ParseTime, WithTimeZone) {
-  const absl::TimeZone tz =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  absl::Time t;
-  std::string e;
-
-  // We can parse a string without a UTC offset if we supply a timezone.
-  EXPECT_TRUE(
-      absl::ParseTime("%Y-%m-%d %H:%M:%S", "2013-06-28 19:08:09", tz, &t, &e))
-      << e;
-  auto ci = tz.At(t);
-  EXPECT_EQ(absl::CivilSecond(2013, 6, 28, 19, 8, 9), ci.cs);
-  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
-
-  // But the timezone is ignored when a UTC offset is present.
-  EXPECT_TRUE(absl::ParseTime("%Y-%m-%d %H:%M:%S %z",
-                              "2013-06-28 19:08:09 +0800", tz, &t, &e))
-      << e;
-  ci = absl::FixedTimeZone(8 * 60 * 60).At(t);
-  EXPECT_EQ(absl::CivilSecond(2013, 6, 28, 19, 8, 9), ci.cs);
-  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
-}
-
-TEST(ParseTime, ErrorCases) {
-  absl::Time t = absl::FromTimeT(0);
-  std::string err;
-
-  EXPECT_FALSE(absl::ParseTime("%S", "123", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-
-  // Can't parse an illegal format specifier.
-  err.clear();
-  EXPECT_FALSE(absl::ParseTime("%Q", "x", &t, &err)) << err;
-  // Exact contents of "err" are platform-dependent because of
-  // differences in the strptime implementation between macOS and Linux.
-  EXPECT_FALSE(err.empty());
-
-  // Fails because of trailing, unparsed data "blah".
-  EXPECT_FALSE(absl::ParseTime("%m-%d", "2-3 blah", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-
-  // Feb 31 requires normalization.
-  EXPECT_FALSE(absl::ParseTime("%m-%d", "2-31", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Out-of-range"));
-
-  // Check that we cannot have spaces in UTC offsets.
-  EXPECT_TRUE(absl::ParseTime("%z", "-0203", &t, &err)) << err;
-  EXPECT_FALSE(absl::ParseTime("%z", "- 2 3", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_TRUE(absl::ParseTime("%Ez", "-02:03", &t, &err)) << err;
-  EXPECT_FALSE(absl::ParseTime("%Ez", "- 2: 3", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-
-  // Check that we reject other malformed UTC offsets.
-  EXPECT_FALSE(absl::ParseTime("%Ez", "+-08:00", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%Ez", "-+08:00", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-
-  // Check that we do not accept "-0" in fields that allow zero.
-  EXPECT_FALSE(absl::ParseTime("%Y", "-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%E4Y", "-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%H", "-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%M", "-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%S", "-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%z", "+-000", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%Ez", "+-0:00", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-  EXPECT_FALSE(absl::ParseTime("%z", "-00-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-  EXPECT_FALSE(absl::ParseTime("%Ez", "-00:-0", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-}
-
-TEST(ParseTime, ExtendedSeconds) {
-  std::string err;
-  absl::Time t;
-
-  // Here is a "%E*S" case we got wrong for a while.  The fractional
-  // part of the first instant is less than 2^31 and was correctly
-  // parsed, while the second (and any subsecond field >=2^31) failed.
-  t = absl::UnixEpoch();
-  EXPECT_TRUE(absl::ParseTime("%E*S", "0.2147483647", &t, &err)) << err;
-  EXPECT_EQ(absl::UnixEpoch() + absl::Nanoseconds(214748364) +
-                absl::Nanoseconds(1) / 2,
-            t);
-  t = absl::UnixEpoch();
-  EXPECT_TRUE(absl::ParseTime("%E*S", "0.2147483648", &t, &err)) << err;
-  EXPECT_EQ(absl::UnixEpoch() + absl::Nanoseconds(214748364) +
-                absl::Nanoseconds(3) / 4,
-            t);
-
-  // We should also be able to specify long strings of digits far
-  // beyond the current resolution and have them convert the same way.
-  t = absl::UnixEpoch();
-  EXPECT_TRUE(absl::ParseTime(
-      "%E*S", "0.214748364801234567890123456789012345678901234567890123456789",
-      &t, &err))
-      << err;
-  EXPECT_EQ(absl::UnixEpoch() + absl::Nanoseconds(214748364) +
-                absl::Nanoseconds(3) / 4,
-            t);
-}
-
-TEST(ParseTime, ExtendedOffsetErrors) {
-  std::string err;
-  absl::Time t;
-
-  // %z against +-HHMM.
-  EXPECT_FALSE(absl::ParseTime("%z", "-123", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-
-  // %z against +-HH.
-  EXPECT_FALSE(absl::ParseTime("%z", "-1", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-
-  // %Ez against +-HH:MM.
-  EXPECT_FALSE(absl::ParseTime("%Ez", "-12:3", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-
-  // %Ez against +-HHMM.
-  EXPECT_FALSE(absl::ParseTime("%Ez", "-123", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
-
-  // %Ez against +-HH.
-  EXPECT_FALSE(absl::ParseTime("%Ez", "-1", &t, &err)) << err;
-  EXPECT_THAT(err, HasSubstr("Failed to parse"));
-}
-
-TEST(ParseTime, InfiniteTime) {
-  absl::Time t;
-  std::string err;
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-future", &t, &err));
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-
-  // Surrounding whitespace.
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-future", &t, &err));
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-future  ", &t, &err));
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-future  ", &t, &err));
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-past", &t, &err));
-  EXPECT_EQ(absl::InfinitePast(), t);
-
-  // Surrounding whitespace.
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-past", &t, &err));
-  EXPECT_EQ(absl::InfinitePast(), t);
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-past  ", &t, &err));
-  EXPECT_EQ(absl::InfinitePast(), t);
-  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-past  ", &t, &err));
-  EXPECT_EQ(absl::InfinitePast(), t);
-
-  // "infinite-future" as literal string
-  absl::TimeZone tz = absl::UTCTimeZone();
-  EXPECT_TRUE(absl::ParseTime("infinite-future %H:%M", "infinite-future 03:04",
-                              &t, &err));
-  EXPECT_NE(absl::InfiniteFuture(), t);
-  EXPECT_EQ(3, tz.At(t).cs.hour());
-  EXPECT_EQ(4, tz.At(t).cs.minute());
-
-  // "infinite-past" as literal string
-  EXPECT_TRUE(
-      absl::ParseTime("infinite-past %H:%M", "infinite-past 03:04", &t, &err));
-  EXPECT_NE(absl::InfinitePast(), t);
-  EXPECT_EQ(3, tz.At(t).cs.hour());
-  EXPECT_EQ(4, tz.At(t).cs.minute());
-
-  // The input doesn't match the format.
-  EXPECT_FALSE(absl::ParseTime("infinite-future %H:%M", "03:04", &t, &err));
-  EXPECT_FALSE(absl::ParseTime("infinite-past %H:%M", "03:04", &t, &err));
-}
-
-TEST(ParseTime, FailsOnUnrepresentableTime) {
-  const absl::TimeZone utc = absl::UTCTimeZone();
-  absl::Time t;
-  EXPECT_FALSE(
-      absl::ParseTime("%Y-%m-%d", "-292277022657-01-27", utc, &t, nullptr));
-  EXPECT_TRUE(
-      absl::ParseTime("%Y-%m-%d", "-292277022657-01-28", utc, &t, nullptr));
-  EXPECT_TRUE(
-      absl::ParseTime("%Y-%m-%d", "292277026596-12-04", utc, &t, nullptr));
-  EXPECT_FALSE(
-      absl::ParseTime("%Y-%m-%d", "292277026596-12-05", utc, &t, nullptr));
-}
-
-//
-// Roundtrip test for FormatTime()/ParseTime().
-//
-
-TEST(FormatParse, RoundTrip) {
-  const absl::TimeZone lax =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  const absl::Time in =
-      absl::FromCivil(absl::CivilSecond(1977, 6, 28, 9, 8, 7), lax);
-  const absl::Duration subseconds = absl::Nanoseconds(654321);
-  std::string err;
-
-  // RFC3339, which renders subseconds.
-  {
-    absl::Time out;
-    const std::string s =
-        absl::FormatTime(absl::RFC3339_full, in + subseconds, lax);
-    EXPECT_TRUE(absl::ParseTime(absl::RFC3339_full, s, &out, &err))
-        << s << ": " << err;
-    EXPECT_EQ(in + subseconds, out);  // RFC3339_full includes %Ez
-  }
-
-  // RFC1123, which only does whole seconds.
-  {
-    absl::Time out;
-    const std::string s = absl::FormatTime(absl::RFC1123_full, in, lax);
-    EXPECT_TRUE(absl::ParseTime(absl::RFC1123_full, s, &out, &err))
-        << s << ": " << err;
-    EXPECT_EQ(in, out);  // RFC1123_full includes %z
-  }
-
-  // `absl::FormatTime()` falls back to strftime() for "%c", which appears to
-  // work. On Windows, `absl::ParseTime()` falls back to std::get_time() which
-  // appears to fail on "%c" (or at least on the "%c" text produced by
-  // `strftime()`). This makes it fail the round-trip test.
-  //
-  // Under the emscripten compiler `absl::ParseTime() falls back to
-  // `strptime()`, but that ends up using a different definition for "%c"
-  // compared to `strftime()`, also causing the round-trip test to fail
-  // (see https://github.com/kripken/emscripten/pull/7491).
-#if !defined(_MSC_VER) && !defined(__EMSCRIPTEN__)
-  // Even though we don't know what %c will produce, it should roundtrip,
-  // but only in the 0-offset timezone.
-  {
-    absl::Time out;
-    const std::string s = absl::FormatTime("%c", in, absl::UTCTimeZone());
-    EXPECT_TRUE(absl::ParseTime("%c", s, &out, &err)) << s << ": " << err;
-    EXPECT_EQ(in, out);
-  }
-#endif  // !_MSC_VER && !__EMSCRIPTEN__
-}
-
-TEST(FormatParse, RoundTripDistantFuture) {
-  const absl::TimeZone tz = absl::UTCTimeZone();
-  const absl::Time in =
-      absl::FromUnixSeconds(std::numeric_limits<int64_t>::max());
-  std::string err;
-
-  absl::Time out;
-  const std::string s = absl::FormatTime(absl::RFC3339_full, in, tz);
-  EXPECT_TRUE(absl::ParseTime(absl::RFC3339_full, s, &out, &err))
-      << s << ": " << err;
-  EXPECT_EQ(in, out);
-}
-
-TEST(FormatParse, RoundTripDistantPast) {
-  const absl::TimeZone tz = absl::UTCTimeZone();
-  const absl::Time in =
-      absl::FromUnixSeconds(std::numeric_limits<int64_t>::min());
-  std::string err;
-
-  absl::Time out;
-  const std::string s = absl::FormatTime(absl::RFC3339_full, in, tz);
-  EXPECT_TRUE(absl::ParseTime(absl::RFC3339_full, s, &out, &err))
-      << s << ": " << err;
-  EXPECT_EQ(in, out);
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/internal/cctz/BUILD.bazel b/third_party/abseil/absl/time/internal/cctz/BUILD.bazel
deleted file mode 100644
index f549af6..0000000
--- a/third_party/abseil/absl/time/internal/cctz/BUILD.bazel
+++ /dev/null
@@ -1,171 +0,0 @@
-# Copyright 2016 Google Inc. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#   https://www.apache.org/licenses/LICENSE-2.0
-#
-#   Unless required by applicable law or agreed to in writing, software
-#   distributed under the License is distributed on an "AS IS" BASIS,
-#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#   See the License for the specific language governing permissions and
-#   limitations under the License.
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-
-package(features = ["-parse_headers"])
-
-licenses(["notice"])
-
-filegroup(
-    name = "zoneinfo",
-    srcs = glob(["testdata/zoneinfo/**"]),
-)
-
-config_setting(
-    name = "osx",
-    constraint_values = [
-        "@platforms//os:osx",
-    ],
-)
-
-config_setting(
-    name = "ios",
-    constraint_values = [
-        "@platforms//os:ios",
-    ],
-)
-
-### libraries
-
-cc_library(
-    name = "civil_time",
-    srcs = ["src/civil_time_detail.cc"],
-    hdrs = [
-        "include/cctz/civil_time.h",
-    ],
-    textual_hdrs = ["include/cctz/civil_time_detail.h"],
-    visibility = ["//visibility:public"],
-    deps = ["//absl/base:config"],
-)
-
-cc_library(
-    name = "time_zone",
-    srcs = [
-        "src/time_zone_fixed.cc",
-        "src/time_zone_fixed.h",
-        "src/time_zone_format.cc",
-        "src/time_zone_if.cc",
-        "src/time_zone_if.h",
-        "src/time_zone_impl.cc",
-        "src/time_zone_impl.h",
-        "src/time_zone_info.cc",
-        "src/time_zone_info.h",
-        "src/time_zone_libc.cc",
-        "src/time_zone_libc.h",
-        "src/time_zone_lookup.cc",
-        "src/time_zone_posix.cc",
-        "src/time_zone_posix.h",
-        "src/tzfile.h",
-        "src/zone_info_source.cc",
-    ],
-    hdrs = [
-        "include/cctz/time_zone.h",
-        "include/cctz/zone_info_source.h",
-    ],
-    linkopts = select({
-        ":osx": [
-            "-framework Foundation",
-        ],
-        ":ios": [
-            "-framework Foundation",
-        ],
-        "//conditions:default": [],
-    }),
-    visibility = ["//visibility:public"],
-    deps = [
-        ":civil_time",
-        "//absl/base:config",
-    ],
-)
-
-### tests
-
-test_suite(
-    name = "all_tests",
-    visibility = ["//visibility:public"],
-)
-
-cc_test(
-    name = "civil_time_test",
-    size = "small",
-    srcs = ["src/civil_time_test.cc"],
-    deps = [
-        ":civil_time",
-        "//absl/base:config",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "time_zone_format_test",
-    size = "small",
-    srcs = ["src/time_zone_format_test.cc"],
-    data = [":zoneinfo"],
-    tags = [
-        "no_test_android_arm",
-        "no_test_android_arm64",
-        "no_test_android_x86",
-    ],
-    deps = [
-        ":civil_time",
-        ":time_zone",
-        "//absl/base:config",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "time_zone_lookup_test",
-    size = "small",
-    timeout = "moderate",
-    srcs = ["src/time_zone_lookup_test.cc"],
-    data = [":zoneinfo"],
-    tags = [
-        "no_test_android_arm",
-        "no_test_android_arm64",
-        "no_test_android_x86",
-    ],
-    deps = [
-        ":civil_time",
-        ":time_zone",
-        "//absl/base:config",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-### benchmarks
-
-cc_test(
-    name = "cctz_benchmark",
-    srcs = [
-        "src/cctz_benchmark.cc",
-        "src/time_zone_if.h",
-        "src/time_zone_impl.h",
-        "src/time_zone_info.h",
-        "src/tzfile.h",
-    ],
-    linkstatic = 1,
-    tags = ["benchmark"],
-    deps = [
-        ":civil_time",
-        ":time_zone",
-        "//absl/base:config",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-### examples
-
-### binaries
diff --git a/third_party/abseil/absl/time/internal/cctz/include/cctz/civil_time.h b/third_party/abseil/absl/time/internal/cctz/include/cctz/civil_time.h
deleted file mode 100644
index d47ff86..0000000
--- a/third_party/abseil/absl/time/internal/cctz/include/cctz/civil_time.h
+++ /dev/null
@@ -1,332 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_H_
-#define ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_H_
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time_detail.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// The term "civil time" refers to the legally recognized human-scale time
-// that is represented by the six fields YYYY-MM-DD hh:mm:ss. Modern-day civil
-// time follows the Gregorian Calendar and is a time-zone-independent concept.
-// A "date" is perhaps the most common example of a civil time (represented in
-// this library as cctz::civil_day). This library provides six classes and a
-// handful of functions that help with rounding, iterating, and arithmetic on
-// civil times while avoiding complications like daylight-saving time (DST).
-//
-// The following six classes form the core of this civil-time library:
-//
-//   * civil_second
-//   * civil_minute
-//   * civil_hour
-//   * civil_day
-//   * civil_month
-//   * civil_year
-//
-// Each class is a simple value type with the same interface for construction
-// and the same six accessors for each of the civil fields (year, month, day,
-// hour, minute, and second, aka YMDHMS). These classes differ only in their
-// alignment, which is indicated by the type name and specifies the field on
-// which arithmetic operates.
-//
-// Each class can be constructed by passing up to six optional integer
-// arguments representing the YMDHMS fields (in that order) to the
-// constructor. Omitted fields are assigned their minimum valid value. Hours,
-// minutes, and seconds will be set to 0, month and day will be set to 1, and
-// since there is no minimum valid year, it will be set to 1970. So, a
-// default-constructed civil-time object will have YMDHMS fields representing
-// "1970-01-01 00:00:00". Fields that are out-of-range are normalized (e.g.,
-// October 32 -> November 1) so that all civil-time objects represent valid
-// values.
-//
-// Each civil-time class is aligned to the civil-time field indicated in the
-// class's name after normalization. Alignment is performed by setting all the
-// inferior fields to their minimum valid value (as described above). The
-// following are examples of how each of the six types would align the fields
-// representing November 22, 2015 at 12:34:56 in the afternoon. (Note: the
-// string format used here is not important; it's just a shorthand way of
-// showing the six YMDHMS fields.)
-//
-//   civil_second  2015-11-22 12:34:56
-//   civil_minute  2015-11-22 12:34:00
-//   civil_hour    2015-11-22 12:00:00
-//   civil_day     2015-11-22 00:00:00
-//   civil_month   2015-11-01 00:00:00
-//   civil_year    2015-01-01 00:00:00
-//
-// Each civil-time type performs arithmetic on the field to which it is
-// aligned. This means that adding 1 to a civil_day increments the day field
-// (normalizing as necessary), and subtracting 7 from a civil_month operates
-// on the month field (normalizing as necessary). All arithmetic produces a
-// valid civil time. Difference requires two similarly aligned civil-time
-// objects and returns the scalar answer in units of the objects' alignment.
-// For example, the difference between two civil_hour objects will give an
-// answer in units of civil hours.
-//
-// In addition to the six civil-time types just described, there are
-// a handful of helper functions and algorithms for performing common
-// calculations. These are described below.
-//
-// Note: In C++14 and later, this library is usable in a constexpr context.
-//
-// CONSTRUCTION:
-//
-// Each of the civil-time types can be constructed in two ways: by directly
-// passing to the constructor up to six (optional) integers representing the
-// YMDHMS fields, or by copying the YMDHMS fields from a differently aligned
-// civil-time type.
-//
-//   civil_day default_value;  // 1970-01-01 00:00:00
-//
-//   civil_day a(2015, 2, 3);           // 2015-02-03 00:00:00
-//   civil_day b(2015, 2, 3, 4, 5, 6);  // 2015-02-03 00:00:00
-//   civil_day c(2015);                 // 2015-01-01 00:00:00
-//
-//   civil_second ss(2015, 2, 3, 4, 5, 6);  // 2015-02-03 04:05:06
-//   civil_minute mm(ss);                   // 2015-02-03 04:05:00
-//   civil_hour hh(mm);                     // 2015-02-03 04:00:00
-//   civil_day d(hh);                       // 2015-02-03 00:00:00
-//   civil_month m(d);                      // 2015-02-01 00:00:00
-//   civil_year y(m);                       // 2015-01-01 00:00:00
-//
-//   m = civil_month(y);     // 2015-01-01 00:00:00
-//   d = civil_day(m);       // 2015-01-01 00:00:00
-//   hh = civil_hour(d);     // 2015-01-01 00:00:00
-//   mm = civil_minute(hh);  // 2015-01-01 00:00:00
-//   ss = civil_second(mm);  // 2015-01-01 00:00:00
-//
-// ALIGNMENT CONVERSION:
-//
-// The alignment of a civil-time object cannot change, but the object may be
-// used to construct a new object with a different alignment. This is referred
-// to as "realigning". When realigning to a type with the same or more
-// precision (e.g., civil_day -> civil_second), the conversion may be
-// performed implicitly since no information is lost. However, if information
-// could be discarded (e.g., civil_second -> civil_day), the conversion must
-// be explicit at the call site.
-//
-//   void fun(const civil_day& day);
-//
-//   civil_second cs;
-//   fun(cs);  // Won't compile because data may be discarded
-//   fun(civil_day(cs));  // OK: explicit conversion
-//
-//   civil_day cd;
-//   fun(cd);  // OK: no conversion needed
-//
-//   civil_month cm;
-//   fun(cm);  // OK: implicit conversion to civil_day
-//
-// NORMALIZATION:
-//
-// Integer arguments passed to the constructor may be out-of-range, in which
-// case they are normalized to produce a valid civil-time object. This enables
-// natural arithmetic on constructor arguments without worrying about the
-// field's range. Normalization guarantees that there are no invalid
-// civil-time objects.
-//
-//   civil_day d(2016, 10, 32);  // Out-of-range day; normalized to 2016-11-01
-//
-// Note: If normalization is undesired, you can signal an error by comparing
-// the constructor arguments to the normalized values returned by the YMDHMS
-// properties.
-//
-// PROPERTIES:
-//
-// All civil-time types have accessors for all six of the civil-time fields:
-// year, month, day, hour, minute, and second. Recall that fields inferior to
-// the type's alignment will be set to their minimum valid value.
-//
-//   civil_day d(2015, 6, 28);
-//   // d.year() == 2015
-//   // d.month() == 6
-//   // d.day() == 28
-//   // d.hour() == 0
-//   // d.minute() == 0
-//   // d.second() == 0
-//
-// COMPARISON:
-//
-// Comparison always considers all six YMDHMS fields, regardless of the type's
-// alignment. Comparison between differently aligned civil-time types is
-// allowed.
-//
-//   civil_day feb_3(2015, 2, 3);  // 2015-02-03 00:00:00
-//   civil_day mar_4(2015, 3, 4);  // 2015-03-04 00:00:00
-//   // feb_3 < mar_4
-//   // civil_year(feb_3) == civil_year(mar_4)
-//
-//   civil_second feb_3_noon(2015, 2, 3, 12, 0, 0);  // 2015-02-03 12:00:00
-//   // feb_3 < feb_3_noon
-//   // feb_3 == civil_day(feb_3_noon)
-//
-//   // Iterates all the days of February 2015.
-//   for (civil_day d(2015, 2, 1); d < civil_month(2015, 3); ++d) {
-//     // ...
-//   }
-//
-// STREAMING:
-//
-// Each civil-time type may be sent to an output stream using operator<<().
-// The output format follows the pattern "YYYY-MM-DDThh:mm:ss" where fields
-// inferior to the type's alignment are omitted.
-//
-//   civil_second cs(2015, 2, 3, 4, 5, 6);
-//   std::cout << cs << "\n";  // Outputs: 2015-02-03T04:05:06
-//
-//   civil_day cd(cs);
-//   std::cout << cd << "\n";  // Outputs: 2015-02-03
-//
-//   civil_year cy(cs);
-//   std::cout << cy << "\n";  // Outputs: 2015
-//
-// ARITHMETIC:
-//
-// Civil-time types support natural arithmetic operators such as addition,
-// subtraction, and difference. Arithmetic operates on the civil-time field
-// indicated in the type's name. Difference requires arguments with the same
-// alignment and returns the answer in units of the alignment.
-//
-//   civil_day a(2015, 2, 3);
-//   ++a;                         // 2015-02-04 00:00:00
-//   --a;                         // 2015-02-03 00:00:00
-//   civil_day b = a + 1;         // 2015-02-04 00:00:00
-//   civil_day c = 1 + b;         // 2015-02-05 00:00:00
-//   int n = c - a;               // n = 2 (civil days)
-//   int m = c - civil_month(c);  // Won't compile: different types.
-//
-// EXAMPLE: Adding a month to January 31.
-//
-// One of the classic questions that arises when considering a civil-time
-// library (or a date library or a date/time library) is this: "What happens
-// when you add a month to January 31?" This is an interesting question
-// because there could be a number of possible answers:
-//
-//   1. March 3 (or 2 if a leap year). This may make sense if the operation
-//      wants the equivalent of February 31.
-//   2. February 28 (or 29 if a leap year). This may make sense if the operation
-//      wants the last day of January to go to the last day of February.
-//   3. Error. The caller may get some error, an exception, an invalid date
-//      object, or maybe false is returned. This may make sense because there is
-//      no single unambiguously correct answer to the question.
-//
-// Practically speaking, any answer that is not what the programmer intended
-// is the wrong answer.
-//
-// This civil-time library avoids the problem by making it impossible to ask
-// ambiguous questions. All civil-time objects are aligned to a particular
-// civil-field boundary (such as aligned to a year, month, day, hour, minute,
-// or second), and arithmetic operates on the field to which the object is
-// aligned. This means that in order to "add a month" the object must first be
-// aligned to a month boundary, which is equivalent to the first day of that
-// month.
-//
-// Of course, there are ways to compute an answer the question at hand using
-// this civil-time library, but they require the programmer to be explicit
-// about the answer they expect. To illustrate, let's see how to compute all
-// three of the above possible answers to the question of "Jan 31 plus 1
-// month":
-//
-//   const civil_day d(2015, 1, 31);
-//
-//   // Answer 1:
-//   // Add 1 to the month field in the constructor, and rely on normalization.
-//   const auto ans_normalized = civil_day(d.year(), d.month() + 1, d.day());
-//   // ans_normalized == 2015-03-03 (aka Feb 31)
-//
-//   // Answer 2:
-//   // Add 1 to month field, capping to the end of next month.
-//   const auto next_month = civil_month(d) + 1;
-//   const auto last_day_of_next_month = civil_day(next_month + 1) - 1;
-//   const auto ans_capped = std::min(ans_normalized, last_day_of_next_month);
-//   // ans_capped == 2015-02-28
-//
-//   // Answer 3:
-//   // Signal an error if the normalized answer is not in next month.
-//   if (civil_month(ans_normalized) != next_month) {
-//     // error, month overflow
-//   }
-//
-using civil_year = detail::civil_year;
-using civil_month = detail::civil_month;
-using civil_day = detail::civil_day;
-using civil_hour = detail::civil_hour;
-using civil_minute = detail::civil_minute;
-using civil_second = detail::civil_second;
-
-// An enum class with members monday, tuesday, wednesday, thursday, friday,
-// saturday, and sunday. These enum values may be sent to an output stream
-// using operator<<(). The result is the full weekday name in English with a
-// leading capital letter.
-//
-//   weekday wd = weekday::thursday;
-//   std::cout << wd << "\n";  // Outputs: Thursday
-//
-using detail::weekday;
-
-// Returns the weekday for the given civil-time value.
-//
-//   civil_day a(2015, 8, 13);
-//   weekday wd = get_weekday(a);  // wd == weekday::thursday
-//
-using detail::get_weekday;
-
-// Returns the civil_day that strictly follows or precedes the given
-// civil_day, and that falls on the given weekday.
-//
-// For example, given:
-//
-//     August 2015
-// Su Mo Tu We Th Fr Sa
-//                    1
-//  2  3  4  5  6  7  8
-//  9 10 11 12 13 14 15
-// 16 17 18 19 20 21 22
-// 23 24 25 26 27 28 29
-// 30 31
-//
-//   civil_day a(2015, 8, 13);  // get_weekday(a) == weekday::thursday
-//   civil_day b = next_weekday(a, weekday::thursday);  // b = 2015-08-20
-//   civil_day c = prev_weekday(a, weekday::thursday);  // c = 2015-08-06
-//
-//   civil_day d = ...
-//   // Gets the following Thursday if d is not already Thursday
-//   civil_day thurs1 = next_weekday(d - 1, weekday::thursday);
-//   // Gets the previous Thursday if d is not already Thursday
-//   civil_day thurs2 = prev_weekday(d + 1, weekday::thursday);
-//
-using detail::next_weekday;
-using detail::prev_weekday;
-
-// Returns the day-of-year for the given civil-time value.
-//
-//   civil_day a(2015, 1, 1);
-//   int yd_jan_1 = get_yearday(a);   // yd_jan_1 = 1
-//   civil_day b(2015, 12, 31);
-//   int yd_dec_31 = get_yearday(b);  // yd_dec_31 = 365
-//
-using detail::get_yearday;
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/include/cctz/civil_time_detail.h b/third_party/abseil/absl/time/internal/cctz/include/cctz/civil_time_detail.h
deleted file mode 100644
index 8aadde5..0000000
--- a/third_party/abseil/absl/time/internal/cctz/include/cctz/civil_time_detail.h
+++ /dev/null
@@ -1,628 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_DETAIL_H_
-#define ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_DETAIL_H_
-
-#include <cstdint>
-#include <limits>
-#include <ostream>
-#include <type_traits>
-
-#include "absl/base/config.h"
-
-// Disable constexpr support unless we are in C++14 mode.
-#if __cpp_constexpr >= 201304 || (defined(_MSC_VER) && _MSC_VER >= 1910)
-#define CONSTEXPR_D constexpr  // data
-#define CONSTEXPR_F constexpr  // function
-#define CONSTEXPR_M constexpr  // member
-#else
-#define CONSTEXPR_D const
-#define CONSTEXPR_F inline
-#define CONSTEXPR_M
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// Support years that at least span the range of 64-bit time_t values.
-using year_t = std::int_fast64_t;
-
-// Type alias that indicates an argument is not normalized (e.g., the
-// constructor parameters and operands/results of addition/subtraction).
-using diff_t = std::int_fast64_t;
-
-namespace detail {
-
-// Type aliases that indicate normalized argument values.
-using month_t = std::int_fast8_t;   // [1:12]
-using day_t = std::int_fast8_t;     // [1:31]
-using hour_t = std::int_fast8_t;    // [0:23]
-using minute_t = std::int_fast8_t;  // [0:59]
-using second_t = std::int_fast8_t;  // [0:59]
-
-// Normalized civil-time fields: Y-M-D HH:MM:SS.
-struct fields {
-  CONSTEXPR_M fields(year_t year, month_t month, day_t day, hour_t hour,
-                     minute_t minute, second_t second)
-      : y(year), m(month), d(day), hh(hour), mm(minute), ss(second) {}
-  std::int_least64_t y;
-  std::int_least8_t m;
-  std::int_least8_t d;
-  std::int_least8_t hh;
-  std::int_least8_t mm;
-  std::int_least8_t ss;
-};
-
-struct second_tag {};
-struct minute_tag : second_tag {};
-struct hour_tag : minute_tag {};
-struct day_tag : hour_tag {};
-struct month_tag : day_tag {};
-struct year_tag : month_tag {};
-
-////////////////////////////////////////////////////////////////////////
-
-// Field normalization (without avoidable overflow).
-
-namespace impl {
-
-CONSTEXPR_F bool is_leap_year(year_t y) noexcept {
-  return y % 4 == 0 && (y % 100 != 0 || y % 400 == 0);
-}
-CONSTEXPR_F int year_index(year_t y, month_t m) noexcept {
-  return (static_cast<int>((y + (m > 2)) % 400) + 400) % 400;
-}
-CONSTEXPR_F int days_per_century(year_t y, month_t m) noexcept {
-  const int yi = year_index(y, m);
-  return 36524 + (yi == 0 || yi > 300);
-}
-CONSTEXPR_F int days_per_4years(year_t y, month_t m) noexcept {
-  const int yi = year_index(y, m);
-  return 1460 + (yi == 0 || yi > 300 || (yi - 1) % 100 < 96);
-}
-CONSTEXPR_F int days_per_year(year_t y, month_t m) noexcept {
-  return is_leap_year(y + (m > 2)) ? 366 : 365;
-}
-CONSTEXPR_F int days_per_month(year_t y, month_t m) noexcept {
-  CONSTEXPR_D int k_days_per_month[1 + 12] = {
-      -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31  // non leap year
-  };
-  return k_days_per_month[m] + (m == 2 && is_leap_year(y));
-}
-
-CONSTEXPR_F fields n_day(year_t y, month_t m, diff_t d, diff_t cd, hour_t hh,
-                         minute_t mm, second_t ss) noexcept {
-  year_t ey = y % 400;
-  const year_t oey = ey;
-  ey += (cd / 146097) * 400;
-  cd %= 146097;
-  if (cd < 0) {
-    ey -= 400;
-    cd += 146097;
-  }
-  ey += (d / 146097) * 400;
-  d = d % 146097 + cd;
-  if (d > 0) {
-    if (d > 146097) {
-      ey += 400;
-      d -= 146097;
-    }
-  } else {
-    if (d > -365) {
-      // We often hit the previous year when stepping a civil time backwards,
-      // so special case it to avoid counting up by 100/4/1-year chunks.
-      ey -= 1;
-      d += days_per_year(ey, m);
-    } else {
-      ey -= 400;
-      d += 146097;
-    }
-  }
-  if (d > 365) {
-    for (;;) {
-      int n = days_per_century(ey, m);
-      if (d <= n) break;
-      d -= n;
-      ey += 100;
-    }
-    for (;;) {
-      int n = days_per_4years(ey, m);
-      if (d <= n) break;
-      d -= n;
-      ey += 4;
-    }
-    for (;;) {
-      int n = days_per_year(ey, m);
-      if (d <= n) break;
-      d -= n;
-      ++ey;
-    }
-  }
-  if (d > 28) {
-    for (;;) {
-      int n = days_per_month(ey, m);
-      if (d <= n) break;
-      d -= n;
-      if (++m > 12) {
-        ++ey;
-        m = 1;
-      }
-    }
-  }
-  return fields(y + (ey - oey), m, static_cast<day_t>(d), hh, mm, ss);
-}
-CONSTEXPR_F fields n_mon(year_t y, diff_t m, diff_t d, diff_t cd, hour_t hh,
-                         minute_t mm, second_t ss) noexcept {
-  if (m != 12) {
-    y += m / 12;
-    m %= 12;
-    if (m <= 0) {
-      y -= 1;
-      m += 12;
-    }
-  }
-  return n_day(y, static_cast<month_t>(m), d, cd, hh, mm, ss);
-}
-CONSTEXPR_F fields n_hour(year_t y, diff_t m, diff_t d, diff_t cd, diff_t hh,
-                          minute_t mm, second_t ss) noexcept {
-  cd += hh / 24;
-  hh %= 24;
-  if (hh < 0) {
-    cd -= 1;
-    hh += 24;
-  }
-  return n_mon(y, m, d, cd, static_cast<hour_t>(hh), mm, ss);
-}
-CONSTEXPR_F fields n_min(year_t y, diff_t m, diff_t d, diff_t hh, diff_t ch,
-                         diff_t mm, second_t ss) noexcept {
-  ch += mm / 60;
-  mm %= 60;
-  if (mm < 0) {
-    ch -= 1;
-    mm += 60;
-  }
-  return n_hour(y, m, d, hh / 24 + ch / 24, hh % 24 + ch % 24,
-                static_cast<minute_t>(mm), ss);
-}
-CONSTEXPR_F fields n_sec(year_t y, diff_t m, diff_t d, diff_t hh, diff_t mm,
-                         diff_t ss) noexcept {
-  // Optimization for when (non-constexpr) fields are already normalized.
-  if (0 <= ss && ss < 60) {
-    const second_t nss = static_cast<second_t>(ss);
-    if (0 <= mm && mm < 60) {
-      const minute_t nmm = static_cast<minute_t>(mm);
-      if (0 <= hh && hh < 24) {
-        const hour_t nhh = static_cast<hour_t>(hh);
-        if (1 <= d && d <= 28 && 1 <= m && m <= 12) {
-          const day_t nd = static_cast<day_t>(d);
-          const month_t nm = static_cast<month_t>(m);
-          return fields(y, nm, nd, nhh, nmm, nss);
-        }
-        return n_mon(y, m, d, 0, nhh, nmm, nss);
-      }
-      return n_hour(y, m, d, hh / 24, hh % 24, nmm, nss);
-    }
-    return n_min(y, m, d, hh, mm / 60, mm % 60, nss);
-  }
-  diff_t cm = ss / 60;
-  ss %= 60;
-  if (ss < 0) {
-    cm -= 1;
-    ss += 60;
-  }
-  return n_min(y, m, d, hh, mm / 60 + cm / 60, mm % 60 + cm % 60,
-               static_cast<second_t>(ss));
-}
-
-}  // namespace impl
-
-////////////////////////////////////////////////////////////////////////
-
-// Increments the indicated (normalized) field by "n".
-CONSTEXPR_F fields step(second_tag, fields f, diff_t n) noexcept {
-  return impl::n_sec(f.y, f.m, f.d, f.hh, f.mm + n / 60, f.ss + n % 60);
-}
-CONSTEXPR_F fields step(minute_tag, fields f, diff_t n) noexcept {
-  return impl::n_min(f.y, f.m, f.d, f.hh + n / 60, 0, f.mm + n % 60, f.ss);
-}
-CONSTEXPR_F fields step(hour_tag, fields f, diff_t n) noexcept {
-  return impl::n_hour(f.y, f.m, f.d + n / 24, 0, f.hh + n % 24, f.mm, f.ss);
-}
-CONSTEXPR_F fields step(day_tag, fields f, diff_t n) noexcept {
-  return impl::n_day(f.y, f.m, f.d, n, f.hh, f.mm, f.ss);
-}
-CONSTEXPR_F fields step(month_tag, fields f, diff_t n) noexcept {
-  return impl::n_mon(f.y + n / 12, f.m + n % 12, f.d, 0, f.hh, f.mm, f.ss);
-}
-CONSTEXPR_F fields step(year_tag, fields f, diff_t n) noexcept {
-  return fields(f.y + n, f.m, f.d, f.hh, f.mm, f.ss);
-}
-
-////////////////////////////////////////////////////////////////////////
-
-namespace impl {
-
-// Returns (v * f + a) but avoiding intermediate overflow when possible.
-CONSTEXPR_F diff_t scale_add(diff_t v, diff_t f, diff_t a) noexcept {
-  return (v < 0) ? ((v + 1) * f + a) - f : ((v - 1) * f + a) + f;
-}
-
-// Map a (normalized) Y/M/D to the number of days before/after 1970-01-01.
-// Probably overflows for years outside [-292277022656:292277026595].
-CONSTEXPR_F diff_t ymd_ord(year_t y, month_t m, day_t d) noexcept {
-  const diff_t eyear = (m <= 2) ? y - 1 : y;
-  const diff_t era = (eyear >= 0 ? eyear : eyear - 399) / 400;
-  const diff_t yoe = eyear - era * 400;
-  const diff_t doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1;
-  const diff_t doe = yoe * 365 + yoe / 4 - yoe / 100 + doy;
-  return era * 146097 + doe - 719468;
-}
-
-// Returns the difference in days between two normalized Y-M-D tuples.
-// ymd_ord() will encounter integer overflow given extreme year values,
-// yet the difference between two such extreme values may actually be
-// small, so we take a little care to avoid overflow when possible by
-// exploiting the 146097-day cycle.
-CONSTEXPR_F diff_t day_difference(year_t y1, month_t m1, day_t d1, year_t y2,
-                                  month_t m2, day_t d2) noexcept {
-  const diff_t a_c4_off = y1 % 400;
-  const diff_t b_c4_off = y2 % 400;
-  diff_t c4_diff = (y1 - a_c4_off) - (y2 - b_c4_off);
-  diff_t delta = ymd_ord(a_c4_off, m1, d1) - ymd_ord(b_c4_off, m2, d2);
-  if (c4_diff > 0 && delta < 0) {
-    delta += 2 * 146097;
-    c4_diff -= 2 * 400;
-  } else if (c4_diff < 0 && delta > 0) {
-    delta -= 2 * 146097;
-    c4_diff += 2 * 400;
-  }
-  return (c4_diff / 400 * 146097) + delta;
-}
-
-}  // namespace impl
-
-// Returns the difference between fields structs using the indicated unit.
-CONSTEXPR_F diff_t difference(year_tag, fields f1, fields f2) noexcept {
-  return f1.y - f2.y;
-}
-CONSTEXPR_F diff_t difference(month_tag, fields f1, fields f2) noexcept {
-  return impl::scale_add(difference(year_tag{}, f1, f2), 12, (f1.m - f2.m));
-}
-CONSTEXPR_F diff_t difference(day_tag, fields f1, fields f2) noexcept {
-  return impl::day_difference(f1.y, f1.m, f1.d, f2.y, f2.m, f2.d);
-}
-CONSTEXPR_F diff_t difference(hour_tag, fields f1, fields f2) noexcept {
-  return impl::scale_add(difference(day_tag{}, f1, f2), 24, (f1.hh - f2.hh));
-}
-CONSTEXPR_F diff_t difference(minute_tag, fields f1, fields f2) noexcept {
-  return impl::scale_add(difference(hour_tag{}, f1, f2), 60, (f1.mm - f2.mm));
-}
-CONSTEXPR_F diff_t difference(second_tag, fields f1, fields f2) noexcept {
-  return impl::scale_add(difference(minute_tag{}, f1, f2), 60, f1.ss - f2.ss);
-}
-
-////////////////////////////////////////////////////////////////////////
-
-// Aligns the (normalized) fields struct to the indicated field.
-CONSTEXPR_F fields align(second_tag, fields f) noexcept { return f; }
-CONSTEXPR_F fields align(minute_tag, fields f) noexcept {
-  return fields{f.y, f.m, f.d, f.hh, f.mm, 0};
-}
-CONSTEXPR_F fields align(hour_tag, fields f) noexcept {
-  return fields{f.y, f.m, f.d, f.hh, 0, 0};
-}
-CONSTEXPR_F fields align(day_tag, fields f) noexcept {
-  return fields{f.y, f.m, f.d, 0, 0, 0};
-}
-CONSTEXPR_F fields align(month_tag, fields f) noexcept {
-  return fields{f.y, f.m, 1, 0, 0, 0};
-}
-CONSTEXPR_F fields align(year_tag, fields f) noexcept {
-  return fields{f.y, 1, 1, 0, 0, 0};
-}
-
-////////////////////////////////////////////////////////////////////////
-
-namespace impl {
-
-template <typename H>
-H AbslHashValueImpl(second_tag, H h, fields f) {
-  return H::combine(std::move(h), f.y, f.m, f.d, f.hh, f.mm, f.ss);
-}
-template <typename H>
-H AbslHashValueImpl(minute_tag, H h, fields f) {
-  return H::combine(std::move(h), f.y, f.m, f.d, f.hh, f.mm);
-}
-template <typename H>
-H AbslHashValueImpl(hour_tag, H h, fields f) {
-  return H::combine(std::move(h), f.y, f.m, f.d, f.hh);
-}
-template <typename H>
-H AbslHashValueImpl(day_tag, H h, fields f) {
-  return H::combine(std::move(h), f.y, f.m, f.d);
-}
-template <typename H>
-H AbslHashValueImpl(month_tag, H h, fields f) {
-  return H::combine(std::move(h), f.y, f.m);
-}
-template <typename H>
-H AbslHashValueImpl(year_tag, H h, fields f) {
-  return H::combine(std::move(h), f.y);
-}
-
-}  // namespace impl
-
-////////////////////////////////////////////////////////////////////////
-
-template <typename T>
-class civil_time {
- public:
-  explicit CONSTEXPR_M civil_time(year_t y, diff_t m = 1, diff_t d = 1,
-                                  diff_t hh = 0, diff_t mm = 0,
-                                  diff_t ss = 0) noexcept
-      : civil_time(impl::n_sec(y, m, d, hh, mm, ss)) {}
-
-  CONSTEXPR_M civil_time() noexcept : f_{1970, 1, 1, 0, 0, 0} {}
-  civil_time(const civil_time&) = default;
-  civil_time& operator=(const civil_time&) = default;
-
-  // Conversion between civil times of different alignment. Conversion to
-  // a more precise alignment is allowed implicitly (e.g., day -> hour),
-  // but conversion where information is discarded must be explicit
-  // (e.g., second -> minute).
-  template <typename U, typename S>
-  using preserves_data =
-      typename std::enable_if<std::is_base_of<U, S>::value>::type;
-  template <typename U>
-  CONSTEXPR_M civil_time(const civil_time<U>& ct,
-                         preserves_data<T, U>* = nullptr) noexcept
-      : civil_time(ct.f_) {}
-  template <typename U>
-  explicit CONSTEXPR_M civil_time(const civil_time<U>& ct,
-                                  preserves_data<U, T>* = nullptr) noexcept
-      : civil_time(ct.f_) {}
-
-  // Factories for the maximum/minimum representable civil_time.
-  static CONSTEXPR_F civil_time(max)() {
-    const auto max_year = (std::numeric_limits<std::int_least64_t>::max)();
-    return civil_time(max_year, 12, 31, 23, 59, 59);
-  }
-  static CONSTEXPR_F civil_time(min)() {
-    const auto min_year = (std::numeric_limits<std::int_least64_t>::min)();
-    return civil_time(min_year, 1, 1, 0, 0, 0);
-  }
-
-  // Field accessors.  Note: All but year() return an int.
-  CONSTEXPR_M year_t year() const noexcept { return f_.y; }
-  CONSTEXPR_M int month() const noexcept { return f_.m; }
-  CONSTEXPR_M int day() const noexcept { return f_.d; }
-  CONSTEXPR_M int hour() const noexcept { return f_.hh; }
-  CONSTEXPR_M int minute() const noexcept { return f_.mm; }
-  CONSTEXPR_M int second() const noexcept { return f_.ss; }
-
-  // Assigning arithmetic.
-  CONSTEXPR_M civil_time& operator+=(diff_t n) noexcept {
-    return *this = *this + n;
-  }
-  CONSTEXPR_M civil_time& operator-=(diff_t n) noexcept {
-    return *this = *this - n;
-  }
-  CONSTEXPR_M civil_time& operator++() noexcept { return *this += 1; }
-  CONSTEXPR_M civil_time operator++(int) noexcept {
-    const civil_time a = *this;
-    ++*this;
-    return a;
-  }
-  CONSTEXPR_M civil_time& operator--() noexcept { return *this -= 1; }
-  CONSTEXPR_M civil_time operator--(int) noexcept {
-    const civil_time a = *this;
-    --*this;
-    return a;
-  }
-
-  // Binary arithmetic operators.
-  friend CONSTEXPR_F civil_time operator+(civil_time a, diff_t n) noexcept {
-    return civil_time(step(T{}, a.f_, n));
-  }
-  friend CONSTEXPR_F civil_time operator+(diff_t n, civil_time a) noexcept {
-    return a + n;
-  }
-  friend CONSTEXPR_F civil_time operator-(civil_time a, diff_t n) noexcept {
-    return n != (std::numeric_limits<diff_t>::min)()
-               ? civil_time(step(T{}, a.f_, -n))
-               : civil_time(step(T{}, step(T{}, a.f_, -(n + 1)), 1));
-  }
-  friend CONSTEXPR_F diff_t operator-(civil_time lhs, civil_time rhs) noexcept {
-    return difference(T{}, lhs.f_, rhs.f_);
-  }
-
-  template <typename H>
-  friend H AbslHashValue(H h, civil_time a) {
-    return impl::AbslHashValueImpl(T{}, std::move(h), a.f_);
-  }
-
- private:
-  // All instantiations of this template are allowed to call the following
-  // private constructor and access the private fields member.
-  template <typename U>
-  friend class civil_time;
-
-  // The designated constructor that all others eventually call.
-  explicit CONSTEXPR_M civil_time(fields f) noexcept : f_(align(T{}, f)) {}
-
-  fields f_;
-};
-
-// Disallows difference between differently aligned types.
-// auto n = civil_day(...) - civil_hour(...);  // would be confusing.
-template <typename T, typename U>
-CONSTEXPR_F diff_t operator-(civil_time<T>, civil_time<U>) = delete;
-
-using civil_year = civil_time<year_tag>;
-using civil_month = civil_time<month_tag>;
-using civil_day = civil_time<day_tag>;
-using civil_hour = civil_time<hour_tag>;
-using civil_minute = civil_time<minute_tag>;
-using civil_second = civil_time<second_tag>;
-
-////////////////////////////////////////////////////////////////////////
-
-// Relational operators that work with differently aligned objects.
-// Always compares all six fields.
-template <typename T1, typename T2>
-CONSTEXPR_F bool operator<(const civil_time<T1>& lhs,
-                           const civil_time<T2>& rhs) noexcept {
-  return (
-      lhs.year() < rhs.year() ||
-      (lhs.year() == rhs.year() &&
-       (lhs.month() < rhs.month() ||
-        (lhs.month() == rhs.month() &&
-         (lhs.day() < rhs.day() || (lhs.day() == rhs.day() &&
-                                    (lhs.hour() < rhs.hour() ||
-                                     (lhs.hour() == rhs.hour() &&
-                                      (lhs.minute() < rhs.minute() ||
-                                       (lhs.minute() == rhs.minute() &&
-                                        (lhs.second() < rhs.second())))))))))));
-}
-template <typename T1, typename T2>
-CONSTEXPR_F bool operator<=(const civil_time<T1>& lhs,
-                            const civil_time<T2>& rhs) noexcept {
-  return !(rhs < lhs);
-}
-template <typename T1, typename T2>
-CONSTEXPR_F bool operator>=(const civil_time<T1>& lhs,
-                            const civil_time<T2>& rhs) noexcept {
-  return !(lhs < rhs);
-}
-template <typename T1, typename T2>
-CONSTEXPR_F bool operator>(const civil_time<T1>& lhs,
-                           const civil_time<T2>& rhs) noexcept {
-  return rhs < lhs;
-}
-template <typename T1, typename T2>
-CONSTEXPR_F bool operator==(const civil_time<T1>& lhs,
-                            const civil_time<T2>& rhs) noexcept {
-  return lhs.year() == rhs.year() && lhs.month() == rhs.month() &&
-         lhs.day() == rhs.day() && lhs.hour() == rhs.hour() &&
-         lhs.minute() == rhs.minute() && lhs.second() == rhs.second();
-}
-template <typename T1, typename T2>
-CONSTEXPR_F bool operator!=(const civil_time<T1>& lhs,
-                            const civil_time<T2>& rhs) noexcept {
-  return !(lhs == rhs);
-}
-
-////////////////////////////////////////////////////////////////////////
-
-enum class weekday {
-  monday,
-  tuesday,
-  wednesday,
-  thursday,
-  friday,
-  saturday,
-  sunday,
-};
-
-CONSTEXPR_F weekday get_weekday(const civil_second& cs) noexcept {
-  CONSTEXPR_D weekday k_weekday_by_mon_off[13] = {
-      weekday::monday,    weekday::tuesday,  weekday::wednesday,
-      weekday::thursday,  weekday::friday,   weekday::saturday,
-      weekday::sunday,    weekday::monday,   weekday::tuesday,
-      weekday::wednesday, weekday::thursday, weekday::friday,
-      weekday::saturday,
-  };
-  CONSTEXPR_D int k_weekday_offsets[1 + 12] = {
-      -1, 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4,
-  };
-  year_t wd = 2400 + (cs.year() % 400) - (cs.month() < 3);
-  wd += wd / 4 - wd / 100 + wd / 400;
-  wd += k_weekday_offsets[cs.month()] + cs.day();
-  return k_weekday_by_mon_off[wd % 7 + 6];
-}
-
-////////////////////////////////////////////////////////////////////////
-
-CONSTEXPR_F civil_day next_weekday(civil_day cd, weekday wd) noexcept {
-  CONSTEXPR_D weekday k_weekdays_forw[14] = {
-      weekday::monday,    weekday::tuesday,  weekday::wednesday,
-      weekday::thursday,  weekday::friday,   weekday::saturday,
-      weekday::sunday,    weekday::monday,   weekday::tuesday,
-      weekday::wednesday, weekday::thursday, weekday::friday,
-      weekday::saturday,  weekday::sunday,
-  };
-  weekday base = get_weekday(cd);
-  for (int i = 0;; ++i) {
-    if (base == k_weekdays_forw[i]) {
-      for (int j = i + 1;; ++j) {
-        if (wd == k_weekdays_forw[j]) {
-          return cd + (j - i);
-        }
-      }
-    }
-  }
-}
-
-CONSTEXPR_F civil_day prev_weekday(civil_day cd, weekday wd) noexcept {
-  CONSTEXPR_D weekday k_weekdays_back[14] = {
-      weekday::sunday,   weekday::saturday,  weekday::friday,
-      weekday::thursday, weekday::wednesday, weekday::tuesday,
-      weekday::monday,   weekday::sunday,    weekday::saturday,
-      weekday::friday,   weekday::thursday,  weekday::wednesday,
-      weekday::tuesday,  weekday::monday,
-  };
-  weekday base = get_weekday(cd);
-  for (int i = 0;; ++i) {
-    if (base == k_weekdays_back[i]) {
-      for (int j = i + 1;; ++j) {
-        if (wd == k_weekdays_back[j]) {
-          return cd - (j - i);
-        }
-      }
-    }
-  }
-}
-
-CONSTEXPR_F int get_yearday(const civil_second& cs) noexcept {
-  CONSTEXPR_D int k_month_offsets[1 + 12] = {
-      -1, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334,
-  };
-  const int feb29 = (cs.month() > 2 && impl::is_leap_year(cs.year()));
-  return k_month_offsets[cs.month()] + feb29 + cs.day();
-}
-
-////////////////////////////////////////////////////////////////////////
-
-std::ostream& operator<<(std::ostream& os, const civil_year& y);
-std::ostream& operator<<(std::ostream& os, const civil_month& m);
-std::ostream& operator<<(std::ostream& os, const civil_day& d);
-std::ostream& operator<<(std::ostream& os, const civil_hour& h);
-std::ostream& operator<<(std::ostream& os, const civil_minute& m);
-std::ostream& operator<<(std::ostream& os, const civil_second& s);
-std::ostream& operator<<(std::ostream& os, weekday wd);
-
-}  // namespace detail
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef CONSTEXPR_M
-#undef CONSTEXPR_F
-#undef CONSTEXPR_D
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_CIVIL_TIME_DETAIL_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/include/cctz/time_zone.h b/third_party/abseil/absl/time/internal/cctz/include/cctz/time_zone.h
deleted file mode 100644
index 5562a37..0000000
--- a/third_party/abseil/absl/time/internal/cctz/include/cctz/time_zone.h
+++ /dev/null
@@ -1,386 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-// A library for translating between absolute times (represented by
-// std::chrono::time_points of the std::chrono::system_clock) and civil
-// times (represented by cctz::civil_second) using the rules defined by
-// a time zone (cctz::time_zone).
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_H_
-
-#include <chrono>
-#include <cstdint>
-#include <string>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// Convenience aliases. Not intended as public API points.
-template <typename D>
-using time_point = std::chrono::time_point<std::chrono::system_clock, D>;
-using seconds = std::chrono::duration<std::int_fast64_t>;
-using sys_seconds = seconds;  // Deprecated.  Use cctz::seconds instead.
-
-namespace detail {
-template <typename D>
-inline std::pair<time_point<seconds>, D> split_seconds(
-    const time_point<D>& tp) {
-  auto sec = std::chrono::time_point_cast<seconds>(tp);
-  auto sub = tp - sec;
-  if (sub.count() < 0) {
-    sec -= seconds(1);
-    sub += seconds(1);
-  }
-  return {sec, std::chrono::duration_cast<D>(sub)};
-}
-inline std::pair<time_point<seconds>, seconds> split_seconds(
-    const time_point<seconds>& tp) {
-  return {tp, seconds::zero()};
-}
-}  // namespace detail
-
-// cctz::time_zone is an opaque, small, value-type class representing a
-// geo-political region within which particular rules are used for mapping
-// between absolute and civil times. Time zones are named using the TZ
-// identifiers from the IANA Time Zone Database, such as "America/Los_Angeles"
-// or "Australia/Sydney". Time zones are created from factory functions such
-// as load_time_zone(). Note: strings like "PST" and "EDT" are not valid TZ
-// identifiers.
-//
-// Example:
-//   cctz::time_zone utc = cctz::utc_time_zone();
-//   cctz::time_zone pst = cctz::fixed_time_zone(std::chrono::hours(-8));
-//   cctz::time_zone loc = cctz::local_time_zone();
-//   cctz::time_zone lax;
-//   if (!cctz::load_time_zone("America/Los_Angeles", &lax)) { ... }
-//
-// See also:
-// - http://www.iana.org/time-zones
-// - https://en.wikipedia.org/wiki/Zoneinfo
-class time_zone {
- public:
-  time_zone() : time_zone(nullptr) {}  // Equivalent to UTC
-  time_zone(const time_zone&) = default;
-  time_zone& operator=(const time_zone&) = default;
-
-  std::string name() const;
-
-  // An absolute_lookup represents the civil time (cctz::civil_second) within
-  // this time_zone at the given absolute time (time_point). There are
-  // additionally a few other fields that may be useful when working with
-  // older APIs, such as std::tm.
-  //
-  // Example:
-  //   const cctz::time_zone tz = ...
-  //   const auto tp = std::chrono::system_clock::now();
-  //   const cctz::time_zone::absolute_lookup al = tz.lookup(tp);
-  struct absolute_lookup {
-    civil_second cs;
-    // Note: The following fields exist for backward compatibility with older
-    // APIs. Accessing these fields directly is a sign of imprudent logic in
-    // the calling code. Modern time-related code should only access this data
-    // indirectly by way of cctz::format().
-    int offset;        // civil seconds east of UTC
-    bool is_dst;       // is offset non-standard?
-    const char* abbr;  // time-zone abbreviation (e.g., "PST")
-  };
-  absolute_lookup lookup(const time_point<seconds>& tp) const;
-  template <typename D>
-  absolute_lookup lookup(const time_point<D>& tp) const {
-    return lookup(detail::split_seconds(tp).first);
-  }
-
-  // A civil_lookup represents the absolute time(s) (time_point) that
-  // correspond to the given civil time (cctz::civil_second) within this
-  // time_zone. Usually the given civil time represents a unique instant
-  // in time, in which case the conversion is unambiguous. However,
-  // within this time zone, the given civil time may be skipped (e.g.,
-  // during a positive UTC offset shift), or repeated (e.g., during a
-  // negative UTC offset shift). To account for these possibilities,
-  // civil_lookup is richer than just a single time_point.
-  //
-  // In all cases the civil_lookup::kind enum will indicate the nature
-  // of the given civil-time argument, and the pre, trans, and post
-  // members will give the absolute time answers using the pre-transition
-  // offset, the transition point itself, and the post-transition offset,
-  // respectively (all three times are equal if kind == UNIQUE). If any
-  // of these three absolute times is outside the representable range of a
-  // time_point<seconds> the field is set to its maximum/minimum value.
-  //
-  // Example:
-  //   cctz::time_zone lax;
-  //   if (!cctz::load_time_zone("America/Los_Angeles", &lax)) { ... }
-  //
-  //   // A unique civil time.
-  //   auto jan01 = lax.lookup(cctz::civil_second(2011, 1, 1, 0, 0, 0));
-  //   // jan01.kind == cctz::time_zone::civil_lookup::UNIQUE
-  //   // jan01.pre    is 2011/01/01 00:00:00 -0800
-  //   // jan01.trans  is 2011/01/01 00:00:00 -0800
-  //   // jan01.post   is 2011/01/01 00:00:00 -0800
-  //
-  //   // A Spring DST transition, when there is a gap in civil time.
-  //   auto mar13 = lax.lookup(cctz::civil_second(2011, 3, 13, 2, 15, 0));
-  //   // mar13.kind == cctz::time_zone::civil_lookup::SKIPPED
-  //   // mar13.pre   is 2011/03/13 03:15:00 -0700
-  //   // mar13.trans is 2011/03/13 03:00:00 -0700
-  //   // mar13.post  is 2011/03/13 01:15:00 -0800
-  //
-  //   // A Fall DST transition, when civil times are repeated.
-  //   auto nov06 = lax.lookup(cctz::civil_second(2011, 11, 6, 1, 15, 0));
-  //   // nov06.kind == cctz::time_zone::civil_lookup::REPEATED
-  //   // nov06.pre   is 2011/11/06 01:15:00 -0700
-  //   // nov06.trans is 2011/11/06 01:00:00 -0800
-  //   // nov06.post  is 2011/11/06 01:15:00 -0800
-  struct civil_lookup {
-    enum civil_kind {
-      UNIQUE,    // the civil time was singular (pre == trans == post)
-      SKIPPED,   // the civil time did not exist (pre >= trans > post)
-      REPEATED,  // the civil time was ambiguous (pre < trans <= post)
-    } kind;
-    time_point<seconds> pre;    // uses the pre-transition offset
-    time_point<seconds> trans;  // instant of civil-offset change
-    time_point<seconds> post;   // uses the post-transition offset
-  };
-  civil_lookup lookup(const civil_second& cs) const;
-
-  // Finds the time of the next/previous offset change in this time zone.
-  //
-  // By definition, next_transition(tp, &trans) returns false when tp has
-  // its maximum value, and prev_transition(tp, &trans) returns false
-  // when tp has its minimum value. If the zone has no transitions, the
-  // result will also be false no matter what the argument.
-  //
-  // Otherwise, when tp has its minimum value, next_transition(tp, &trans)
-  // returns true and sets trans to the first recorded transition. Chains
-  // of calls to next_transition()/prev_transition() will eventually return
-  // false, but it is unspecified exactly when next_transition(tp, &trans)
-  // jumps to false, or what time is set by prev_transition(tp, &trans) for
-  // a very distant tp.
-  //
-  // Note: Enumeration of time-zone transitions is for informational purposes
-  // only. Modern time-related code should not care about when offset changes
-  // occur.
-  //
-  // Example:
-  //   cctz::time_zone nyc;
-  //   if (!cctz::load_time_zone("America/New_York", &nyc)) { ... }
-  //   const auto now = std::chrono::system_clock::now();
-  //   auto tp = cctz::time_point<cctz::seconds>::min();
-  //   cctz::time_zone::civil_transition trans;
-  //   while (tp <= now && nyc.next_transition(tp, &trans)) {
-  //     // transition: trans.from -> trans.to
-  //     tp = nyc.lookup(trans.to).trans;
-  //   }
-  struct civil_transition {
-    civil_second from;  // the civil time we jump from
-    civil_second to;    // the civil time we jump to
-  };
-  bool next_transition(const time_point<seconds>& tp,
-                       civil_transition* trans) const;
-  template <typename D>
-  bool next_transition(const time_point<D>& tp, civil_transition* trans) const {
-    return next_transition(detail::split_seconds(tp).first, trans);
-  }
-  bool prev_transition(const time_point<seconds>& tp,
-                       civil_transition* trans) const;
-  template <typename D>
-  bool prev_transition(const time_point<D>& tp, civil_transition* trans) const {
-    return prev_transition(detail::split_seconds(tp).first, trans);
-  }
-
-  // version() and description() provide additional information about the
-  // time zone. The content of each of the returned strings is unspecified,
-  // however, when the IANA Time Zone Database is the underlying data source
-  // the version() string will be in the familar form (e.g, "2018e") or
-  // empty when unavailable.
-  //
-  // Note: These functions are for informational or testing purposes only.
-  std::string version() const;  // empty when unknown
-  std::string description() const;
-
-  // Relational operators.
-  friend bool operator==(time_zone lhs, time_zone rhs) {
-    return &lhs.effective_impl() == &rhs.effective_impl();
-  }
-  friend bool operator!=(time_zone lhs, time_zone rhs) { return !(lhs == rhs); }
-
-  template <typename H>
-  friend H AbslHashValue(H h, time_zone tz) {
-    return H::combine(std::move(h), &tz.effective_impl());
-  }
-
-  class Impl;
-
- private:
-  explicit time_zone(const Impl* impl) : impl_(impl) {}
-  const Impl& effective_impl() const;  // handles implicit UTC
-  const Impl* impl_;
-};
-
-// Loads the named time zone. May perform I/O on the initial load.
-// If the name is invalid, or some other kind of error occurs, returns
-// false and "*tz" is set to the UTC time zone.
-bool load_time_zone(const std::string& name, time_zone* tz);
-
-// Returns a time_zone representing UTC. Cannot fail.
-time_zone utc_time_zone();
-
-// Returns a time zone that is a fixed offset (seconds east) from UTC.
-// Note: If the absolute value of the offset is greater than 24 hours
-// you'll get UTC (i.e., zero offset) instead.
-time_zone fixed_time_zone(const seconds& offset);
-
-// Returns a time zone representing the local time zone. Falls back to UTC.
-// Note: local_time_zone.name() may only be something like "localtime".
-time_zone local_time_zone();
-
-// Returns the civil time (cctz::civil_second) within the given time zone at
-// the given absolute time (time_point). Since the additional fields provided
-// by the time_zone::absolute_lookup struct should rarely be needed in modern
-// code, this convert() function is simpler and should be preferred.
-template <typename D>
-inline civil_second convert(const time_point<D>& tp, const time_zone& tz) {
-  return tz.lookup(tp).cs;
-}
-
-// Returns the absolute time (time_point) that corresponds to the given civil
-// time within the given time zone. If the civil time is not unique (i.e., if
-// it was either repeated or non-existent), then the returned time_point is
-// the best estimate that preserves relative order. That is, this function
-// guarantees that if cs1 < cs2, then convert(cs1, tz) <= convert(cs2, tz).
-inline time_point<seconds> convert(const civil_second& cs,
-                                   const time_zone& tz) {
-  const time_zone::civil_lookup cl = tz.lookup(cs);
-  if (cl.kind == time_zone::civil_lookup::SKIPPED) return cl.trans;
-  return cl.pre;
-}
-
-namespace detail {
-using femtoseconds = std::chrono::duration<std::int_fast64_t, std::femto>;
-std::string format(const std::string&, const time_point<seconds>&,
-                   const femtoseconds&, const time_zone&);
-bool parse(const std::string&, const std::string&, const time_zone&,
-           time_point<seconds>*, femtoseconds*, std::string* err = nullptr);
-}  // namespace detail
-
-// Formats the given time_point in the given cctz::time_zone according to
-// the provided format string. Uses strftime()-like formatting options,
-// with the following extensions:
-//
-//   - %Ez  - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm)
-//   - %E*z - Full-resolution numeric UTC offset (+hh:mm:ss or -hh:mm:ss)
-//   - %E#S - Seconds with # digits of fractional precision
-//   - %E*S - Seconds with full fractional precision (a literal '*')
-//   - %E#f - Fractional seconds with # digits of precision
-//   - %E*f - Fractional seconds with full precision (a literal '*')
-//   - %E4Y - Four-character years (-999 ... -001, 0000, 0001 ... 9999)
-//   - %ET  - The RFC3339 "date-time" separator "T"
-//
-// Note that %E0S behaves like %S, and %E0f produces no characters. In
-// contrast %E*f always produces at least one digit, which may be '0'.
-//
-// Note that %Y produces as many characters as it takes to fully render the
-// year. A year outside of [-999:9999] when formatted with %E4Y will produce
-// more than four characters, just like %Y.
-//
-// Tip: Format strings should include the UTC offset (e.g., %z, %Ez, or %E*z)
-// so that the resulting string uniquely identifies an absolute time.
-//
-// Example:
-//   cctz::time_zone lax;
-//   if (!cctz::load_time_zone("America/Los_Angeles", &lax)) { ... }
-//   auto tp = cctz::convert(cctz::civil_second(2013, 1, 2, 3, 4, 5), lax);
-//   std::string f = cctz::format("%H:%M:%S", tp, lax);  // "03:04:05"
-//   f = cctz::format("%H:%M:%E3S", tp, lax);            // "03:04:05.000"
-template <typename D>
-inline std::string format(const std::string& fmt, const time_point<D>& tp,
-                          const time_zone& tz) {
-  const auto p = detail::split_seconds(tp);
-  const auto n = std::chrono::duration_cast<detail::femtoseconds>(p.second);
-  return detail::format(fmt, p.first, n, tz);
-}
-
-// Parses an input string according to the provided format string and
-// returns the corresponding time_point. Uses strftime()-like formatting
-// options, with the same extensions as cctz::format(), but with the
-// exceptions that %E#S is interpreted as %E*S, and %E#f as %E*f. %Ez
-// and %E*z also accept the same inputs, which (along with %z) includes
-// 'z' and 'Z' as synonyms for +00:00.  %ET accepts either 'T' or 't'.
-//
-// %Y consumes as many numeric characters as it can, so the matching data
-// should always be terminated with a non-numeric. %E4Y always consumes
-// exactly four characters, including any sign.
-//
-// Unspecified fields are taken from the default date and time of ...
-//
-//   "1970-01-01 00:00:00.0 +0000"
-//
-// For example, parsing a string of "15:45" (%H:%M) will return a time_point
-// that represents "1970-01-01 15:45:00.0 +0000".
-//
-// Note that parse() returns time instants, so it makes most sense to parse
-// fully-specified date/time strings that include a UTC offset (%z, %Ez, or
-// %E*z).
-//
-// Note also that parse() only heeds the fields year, month, day, hour,
-// minute, (fractional) second, and UTC offset. Other fields, like weekday (%a
-// or %A), while parsed for syntactic validity, are ignored in the conversion.
-//
-// Date and time fields that are out-of-range will be treated as errors rather
-// than normalizing them like cctz::civil_second() would do. For example, it
-// is an error to parse the date "Oct 32, 2013" because 32 is out of range.
-//
-// A second of ":60" is normalized to ":00" of the following minute with
-// fractional seconds discarded. The following table shows how the given
-// seconds and subseconds will be parsed:
-//
-//   "59.x" -> 59.x  // exact
-//   "60.x" -> 00.0  // normalized
-//   "00.x" -> 00.x  // exact
-//
-// Errors are indicated by returning false.
-//
-// Example:
-//   const cctz::time_zone tz = ...
-//   std::chrono::system_clock::time_point tp;
-//   if (cctz::parse("%Y-%m-%d", "2015-10-09", tz, &tp)) {
-//     ...
-//   }
-template <typename D>
-inline bool parse(const std::string& fmt, const std::string& input,
-                  const time_zone& tz, time_point<D>* tpp) {
-  time_point<seconds> sec;
-  detail::femtoseconds fs;
-  const bool b = detail::parse(fmt, input, tz, &sec, &fs);
-  if (b) {
-    // TODO: Return false if unrepresentable as a time_point<D>.
-    *tpp = std::chrono::time_point_cast<D>(sec);
-    *tpp += std::chrono::duration_cast<D>(fs);
-  }
-  return b;
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/include/cctz/zone_info_source.h b/third_party/abseil/absl/time/internal/cctz/include/cctz/zone_info_source.h
deleted file mode 100644
index 012eb4e..0000000
--- a/third_party/abseil/absl/time/internal/cctz/include/cctz/zone_info_source.h
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_ZONE_INFO_SOURCE_H_
-#define ABSL_TIME_INTERNAL_CCTZ_ZONE_INFO_SOURCE_H_
-
-#include <cstddef>
-#include <functional>
-#include <memory>
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// A stdio-like interface for providing zoneinfo data for a particular zone.
-class ZoneInfoSource {
- public:
-  virtual ~ZoneInfoSource();
-
-  virtual std::size_t Read(void* ptr, std::size_t size) = 0;  // like fread()
-  virtual int Skip(std::size_t offset) = 0;                   // like fseek()
-
-  // Until the zoneinfo data supports versioning information, we provide
-  // a way for a ZoneInfoSource to indicate it out-of-band.  The default
-  // implementation returns an empty string.
-  virtual std::string Version() const;
-};
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz_extension {
-
-// A function-pointer type for a factory that returns a ZoneInfoSource
-// given the name of a time zone and a fallback factory.  Returns null
-// when the data for the named zone cannot be found.
-using ZoneInfoSourceFactory =
-    std::unique_ptr<absl::time_internal::cctz::ZoneInfoSource> (*)(
-        const std::string&,
-        const std::function<std::unique_ptr<
-            absl::time_internal::cctz::ZoneInfoSource>(const std::string&)>&);
-
-// The user can control the mapping of zone names to zoneinfo data by
-// providing a definition for cctz_extension::zone_info_source_factory.
-// For example, given functions my_factory() and my_other_factory() that
-// can return a ZoneInfoSource for a named zone, we could inject them into
-// cctz::load_time_zone() with:
-//
-//   namespace cctz_extension {
-//   namespace {
-//   std::unique_ptr<cctz::ZoneInfoSource> CustomFactory(
-//       const std::string& name,
-//       const std::function<std::unique_ptr<cctz::ZoneInfoSource>(
-//           const std::string& name)>& fallback_factory) {
-//     if (auto zip = my_factory(name)) return zip;
-//     if (auto zip = fallback_factory(name)) return zip;
-//     if (auto zip = my_other_factory(name)) return zip;
-//     return nullptr;
-//   }
-//   }  // namespace
-//   ZoneInfoSourceFactory zone_info_source_factory = CustomFactory;
-//   }  // namespace cctz_extension
-//
-// This might be used, say, to use zoneinfo data embedded in the program,
-// or read from a (possibly compressed) file archive, or both.
-//
-// cctz_extension::zone_info_source_factory() will be called:
-//   (1) from the same thread as the cctz::load_time_zone() call,
-//   (2) only once for any zone name, and
-//   (3) serially (i.e., no concurrent execution).
-//
-// The fallback factory obtains zoneinfo data by reading files in ${TZDIR},
-// and it is used automatically when no zone_info_source_factory definition
-// is linked into the program.
-extern ZoneInfoSourceFactory zone_info_source_factory;
-
-}  // namespace cctz_extension
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_ZONE_INFO_SOURCE_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/cctz_benchmark.cc b/third_party/abseil/absl/time/internal/cctz/src/cctz_benchmark.cc
deleted file mode 100644
index 4e39188..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/cctz_benchmark.cc
+++ /dev/null
@@ -1,1030 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include <algorithm>
-#include <cassert>
-#include <chrono>
-#include <ctime>
-#include <random>
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-#include "time_zone_impl.h"
-
-namespace {
-
-namespace cctz = absl::time_internal::cctz;
-
-void BM_Difference_Days(benchmark::State& state) {
-  const cctz::civil_day c(2014, 8, 22);
-  const cctz::civil_day epoch(1970, 1, 1);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(c - epoch);
-  }
-}
-BENCHMARK(BM_Difference_Days);
-
-void BM_Step_Days(benchmark::State& state) {
-  const cctz::civil_day kStart(2014, 8, 22);
-  cctz::civil_day c = kStart;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(++c);
-  }
-}
-BENCHMARK(BM_Step_Days);
-
-void BM_GetWeekday(benchmark::State& state) {
-  const cctz::civil_day c(2014, 8, 22);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::get_weekday(c));
-  }
-}
-BENCHMARK(BM_GetWeekday);
-
-void BM_NextWeekday(benchmark::State& state) {
-  const cctz::civil_day kStart(2014, 8, 22);
-  const cctz::civil_day kDays[7] = {
-      kStart + 0, kStart + 1, kStart + 2, kStart + 3,
-      kStart + 4, kStart + 5, kStart + 6,
-  };
-  const cctz::weekday kWeekdays[7] = {
-      cctz::weekday::monday,   cctz::weekday::tuesday, cctz::weekday::wednesday,
-      cctz::weekday::thursday, cctz::weekday::friday,  cctz::weekday::saturday,
-      cctz::weekday::sunday,
-  };
-  while (state.KeepRunningBatch(7 * 7)) {
-    for (const auto from : kDays) {
-      for (const auto to : kWeekdays) {
-        benchmark::DoNotOptimize(cctz::next_weekday(from, to));
-      }
-    }
-  }
-}
-BENCHMARK(BM_NextWeekday);
-
-void BM_PrevWeekday(benchmark::State& state) {
-  const cctz::civil_day kStart(2014, 8, 22);
-  const cctz::civil_day kDays[7] = {
-      kStart + 0, kStart + 1, kStart + 2, kStart + 3,
-      kStart + 4, kStart + 5, kStart + 6,
-  };
-  const cctz::weekday kWeekdays[7] = {
-      cctz::weekday::monday,   cctz::weekday::tuesday, cctz::weekday::wednesday,
-      cctz::weekday::thursday, cctz::weekday::friday,  cctz::weekday::saturday,
-      cctz::weekday::sunday,
-  };
-  while (state.KeepRunningBatch(7 * 7)) {
-    for (const auto from : kDays) {
-      for (const auto to : kWeekdays) {
-        benchmark::DoNotOptimize(cctz::prev_weekday(from, to));
-      }
-    }
-  }
-}
-BENCHMARK(BM_PrevWeekday);
-
-const char RFC3339_full[] = "%Y-%m-%d%ET%H:%M:%E*S%Ez";
-const char RFC3339_sec[] = "%Y-%m-%d%ET%H:%M:%S%Ez";
-
-const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z";
-const char RFC1123_no_wday[] = "%d %b %Y %H:%M:%S %z";
-
-// A list of known time-zone names.
-// TODO: Refactor with src/time_zone_lookup_test.cc.
-const char* const kTimeZoneNames[] = {"Africa/Abidjan",
-                                      "Africa/Accra",
-                                      "Africa/Addis_Ababa",
-                                      "Africa/Algiers",
-                                      "Africa/Asmara",
-                                      "Africa/Asmera",
-                                      "Africa/Bamako",
-                                      "Africa/Bangui",
-                                      "Africa/Banjul",
-                                      "Africa/Bissau",
-                                      "Africa/Blantyre",
-                                      "Africa/Brazzaville",
-                                      "Africa/Bujumbura",
-                                      "Africa/Cairo",
-                                      "Africa/Casablanca",
-                                      "Africa/Ceuta",
-                                      "Africa/Conakry",
-                                      "Africa/Dakar",
-                                      "Africa/Dar_es_Salaam",
-                                      "Africa/Djibouti",
-                                      "Africa/Douala",
-                                      "Africa/El_Aaiun",
-                                      "Africa/Freetown",
-                                      "Africa/Gaborone",
-                                      "Africa/Harare",
-                                      "Africa/Johannesburg",
-                                      "Africa/Juba",
-                                      "Africa/Kampala",
-                                      "Africa/Khartoum",
-                                      "Africa/Kigali",
-                                      "Africa/Kinshasa",
-                                      "Africa/Lagos",
-                                      "Africa/Libreville",
-                                      "Africa/Lome",
-                                      "Africa/Luanda",
-                                      "Africa/Lubumbashi",
-                                      "Africa/Lusaka",
-                                      "Africa/Malabo",
-                                      "Africa/Maputo",
-                                      "Africa/Maseru",
-                                      "Africa/Mbabane",
-                                      "Africa/Mogadishu",
-                                      "Africa/Monrovia",
-                                      "Africa/Nairobi",
-                                      "Africa/Ndjamena",
-                                      "Africa/Niamey",
-                                      "Africa/Nouakchott",
-                                      "Africa/Ouagadougou",
-                                      "Africa/Porto-Novo",
-                                      "Africa/Sao_Tome",
-                                      "Africa/Timbuktu",
-                                      "Africa/Tripoli",
-                                      "Africa/Tunis",
-                                      "Africa/Windhoek",
-                                      "America/Adak",
-                                      "America/Anchorage",
-                                      "America/Anguilla",
-                                      "America/Antigua",
-                                      "America/Araguaina",
-                                      "America/Argentina/Buenos_Aires",
-                                      "America/Argentina/Catamarca",
-                                      "America/Argentina/ComodRivadavia",
-                                      "America/Argentina/Cordoba",
-                                      "America/Argentina/Jujuy",
-                                      "America/Argentina/La_Rioja",
-                                      "America/Argentina/Mendoza",
-                                      "America/Argentina/Rio_Gallegos",
-                                      "America/Argentina/Salta",
-                                      "America/Argentina/San_Juan",
-                                      "America/Argentina/San_Luis",
-                                      "America/Argentina/Tucuman",
-                                      "America/Argentina/Ushuaia",
-                                      "America/Aruba",
-                                      "America/Asuncion",
-                                      "America/Atikokan",
-                                      "America/Atka",
-                                      "America/Bahia",
-                                      "America/Bahia_Banderas",
-                                      "America/Barbados",
-                                      "America/Belem",
-                                      "America/Belize",
-                                      "America/Blanc-Sablon",
-                                      "America/Boa_Vista",
-                                      "America/Bogota",
-                                      "America/Boise",
-                                      "America/Buenos_Aires",
-                                      "America/Cambridge_Bay",
-                                      "America/Campo_Grande",
-                                      "America/Cancun",
-                                      "America/Caracas",
-                                      "America/Catamarca",
-                                      "America/Cayenne",
-                                      "America/Cayman",
-                                      "America/Chicago",
-                                      "America/Chihuahua",
-                                      "America/Coral_Harbour",
-                                      "America/Cordoba",
-                                      "America/Costa_Rica",
-                                      "America/Creston",
-                                      "America/Cuiaba",
-                                      "America/Curacao",
-                                      "America/Danmarkshavn",
-                                      "America/Dawson",
-                                      "America/Dawson_Creek",
-                                      "America/Denver",
-                                      "America/Detroit",
-                                      "America/Dominica",
-                                      "America/Edmonton",
-                                      "America/Eirunepe",
-                                      "America/El_Salvador",
-                                      "America/Ensenada",
-                                      "America/Fort_Nelson",
-                                      "America/Fort_Wayne",
-                                      "America/Fortaleza",
-                                      "America/Glace_Bay",
-                                      "America/Godthab",
-                                      "America/Goose_Bay",
-                                      "America/Grand_Turk",
-                                      "America/Grenada",
-                                      "America/Guadeloupe",
-                                      "America/Guatemala",
-                                      "America/Guayaquil",
-                                      "America/Guyana",
-                                      "America/Halifax",
-                                      "America/Havana",
-                                      "America/Hermosillo",
-                                      "America/Indiana/Indianapolis",
-                                      "America/Indiana/Knox",
-                                      "America/Indiana/Marengo",
-                                      "America/Indiana/Petersburg",
-                                      "America/Indiana/Tell_City",
-                                      "America/Indiana/Vevay",
-                                      "America/Indiana/Vincennes",
-                                      "America/Indiana/Winamac",
-                                      "America/Indianapolis",
-                                      "America/Inuvik",
-                                      "America/Iqaluit",
-                                      "America/Jamaica",
-                                      "America/Jujuy",
-                                      "America/Juneau",
-                                      "America/Kentucky/Louisville",
-                                      "America/Kentucky/Monticello",
-                                      "America/Knox_IN",
-                                      "America/Kralendijk",
-                                      "America/La_Paz",
-                                      "America/Lima",
-                                      "America/Los_Angeles",
-                                      "America/Louisville",
-                                      "America/Lower_Princes",
-                                      "America/Maceio",
-                                      "America/Managua",
-                                      "America/Manaus",
-                                      "America/Marigot",
-                                      "America/Martinique",
-                                      "America/Matamoros",
-                                      "America/Mazatlan",
-                                      "America/Mendoza",
-                                      "America/Menominee",
-                                      "America/Merida",
-                                      "America/Metlakatla",
-                                      "America/Mexico_City",
-                                      "America/Miquelon",
-                                      "America/Moncton",
-                                      "America/Monterrey",
-                                      "America/Montevideo",
-                                      "America/Montreal",
-                                      "America/Montserrat",
-                                      "America/Nassau",
-                                      "America/New_York",
-                                      "America/Nipigon",
-                                      "America/Nome",
-                                      "America/Noronha",
-                                      "America/North_Dakota/Beulah",
-                                      "America/North_Dakota/Center",
-                                      "America/North_Dakota/New_Salem",
-                                      "America/Nuuk",
-                                      "America/Ojinaga",
-                                      "America/Panama",
-                                      "America/Pangnirtung",
-                                      "America/Paramaribo",
-                                      "America/Phoenix",
-                                      "America/Port-au-Prince",
-                                      "America/Port_of_Spain",
-                                      "America/Porto_Acre",
-                                      "America/Porto_Velho",
-                                      "America/Puerto_Rico",
-                                      "America/Punta_Arenas",
-                                      "America/Rainy_River",
-                                      "America/Rankin_Inlet",
-                                      "America/Recife",
-                                      "America/Regina",
-                                      "America/Resolute",
-                                      "America/Rio_Branco",
-                                      "America/Rosario",
-                                      "America/Santa_Isabel",
-                                      "America/Santarem",
-                                      "America/Santiago",
-                                      "America/Santo_Domingo",
-                                      "America/Sao_Paulo",
-                                      "America/Scoresbysund",
-                                      "America/Shiprock",
-                                      "America/Sitka",
-                                      "America/St_Barthelemy",
-                                      "America/St_Johns",
-                                      "America/St_Kitts",
-                                      "America/St_Lucia",
-                                      "America/St_Thomas",
-                                      "America/St_Vincent",
-                                      "America/Swift_Current",
-                                      "America/Tegucigalpa",
-                                      "America/Thule",
-                                      "America/Thunder_Bay",
-                                      "America/Tijuana",
-                                      "America/Toronto",
-                                      "America/Tortola",
-                                      "America/Vancouver",
-                                      "America/Virgin",
-                                      "America/Whitehorse",
-                                      "America/Winnipeg",
-                                      "America/Yakutat",
-                                      "America/Yellowknife",
-                                      "Antarctica/Casey",
-                                      "Antarctica/Davis",
-                                      "Antarctica/DumontDUrville",
-                                      "Antarctica/Macquarie",
-                                      "Antarctica/Mawson",
-                                      "Antarctica/McMurdo",
-                                      "Antarctica/Palmer",
-                                      "Antarctica/Rothera",
-                                      "Antarctica/South_Pole",
-                                      "Antarctica/Syowa",
-                                      "Antarctica/Troll",
-                                      "Antarctica/Vostok",
-                                      "Arctic/Longyearbyen",
-                                      "Asia/Aden",
-                                      "Asia/Almaty",
-                                      "Asia/Amman",
-                                      "Asia/Anadyr",
-                                      "Asia/Aqtau",
-                                      "Asia/Aqtobe",
-                                      "Asia/Ashgabat",
-                                      "Asia/Ashkhabad",
-                                      "Asia/Atyrau",
-                                      "Asia/Baghdad",
-                                      "Asia/Bahrain",
-                                      "Asia/Baku",
-                                      "Asia/Bangkok",
-                                      "Asia/Barnaul",
-                                      "Asia/Beirut",
-                                      "Asia/Bishkek",
-                                      "Asia/Brunei",
-                                      "Asia/Calcutta",
-                                      "Asia/Chita",
-                                      "Asia/Choibalsan",
-                                      "Asia/Chongqing",
-                                      "Asia/Chungking",
-                                      "Asia/Colombo",
-                                      "Asia/Dacca",
-                                      "Asia/Damascus",
-                                      "Asia/Dhaka",
-                                      "Asia/Dili",
-                                      "Asia/Dubai",
-                                      "Asia/Dushanbe",
-                                      "Asia/Famagusta",
-                                      "Asia/Gaza",
-                                      "Asia/Harbin",
-                                      "Asia/Hebron",
-                                      "Asia/Ho_Chi_Minh",
-                                      "Asia/Hong_Kong",
-                                      "Asia/Hovd",
-                                      "Asia/Irkutsk",
-                                      "Asia/Istanbul",
-                                      "Asia/Jakarta",
-                                      "Asia/Jayapura",
-                                      "Asia/Jerusalem",
-                                      "Asia/Kabul",
-                                      "Asia/Kamchatka",
-                                      "Asia/Karachi",
-                                      "Asia/Kashgar",
-                                      "Asia/Kathmandu",
-                                      "Asia/Katmandu",
-                                      "Asia/Khandyga",
-                                      "Asia/Kolkata",
-                                      "Asia/Krasnoyarsk",
-                                      "Asia/Kuala_Lumpur",
-                                      "Asia/Kuching",
-                                      "Asia/Kuwait",
-                                      "Asia/Macao",
-                                      "Asia/Macau",
-                                      "Asia/Magadan",
-                                      "Asia/Makassar",
-                                      "Asia/Manila",
-                                      "Asia/Muscat",
-                                      "Asia/Nicosia",
-                                      "Asia/Novokuznetsk",
-                                      "Asia/Novosibirsk",
-                                      "Asia/Omsk",
-                                      "Asia/Oral",
-                                      "Asia/Phnom_Penh",
-                                      "Asia/Pontianak",
-                                      "Asia/Pyongyang",
-                                      "Asia/Qatar",
-                                      "Asia/Qostanay",
-                                      "Asia/Qyzylorda",
-                                      "Asia/Rangoon",
-                                      "Asia/Riyadh",
-                                      "Asia/Saigon",
-                                      "Asia/Sakhalin",
-                                      "Asia/Samarkand",
-                                      "Asia/Seoul",
-                                      "Asia/Shanghai",
-                                      "Asia/Singapore",
-                                      "Asia/Srednekolymsk",
-                                      "Asia/Taipei",
-                                      "Asia/Tashkent",
-                                      "Asia/Tbilisi",
-                                      "Asia/Tehran",
-                                      "Asia/Tel_Aviv",
-                                      "Asia/Thimbu",
-                                      "Asia/Thimphu",
-                                      "Asia/Tokyo",
-                                      "Asia/Tomsk",
-                                      "Asia/Ujung_Pandang",
-                                      "Asia/Ulaanbaatar",
-                                      "Asia/Ulan_Bator",
-                                      "Asia/Urumqi",
-                                      "Asia/Ust-Nera",
-                                      "Asia/Vientiane",
-                                      "Asia/Vladivostok",
-                                      "Asia/Yakutsk",
-                                      "Asia/Yangon",
-                                      "Asia/Yekaterinburg",
-                                      "Asia/Yerevan",
-                                      "Atlantic/Azores",
-                                      "Atlantic/Bermuda",
-                                      "Atlantic/Canary",
-                                      "Atlantic/Cape_Verde",
-                                      "Atlantic/Faeroe",
-                                      "Atlantic/Faroe",
-                                      "Atlantic/Jan_Mayen",
-                                      "Atlantic/Madeira",
-                                      "Atlantic/Reykjavik",
-                                      "Atlantic/South_Georgia",
-                                      "Atlantic/St_Helena",
-                                      "Atlantic/Stanley",
-                                      "Australia/ACT",
-                                      "Australia/Adelaide",
-                                      "Australia/Brisbane",
-                                      "Australia/Broken_Hill",
-                                      "Australia/Canberra",
-                                      "Australia/Currie",
-                                      "Australia/Darwin",
-                                      "Australia/Eucla",
-                                      "Australia/Hobart",
-                                      "Australia/LHI",
-                                      "Australia/Lindeman",
-                                      "Australia/Lord_Howe",
-                                      "Australia/Melbourne",
-                                      "Australia/NSW",
-                                      "Australia/North",
-                                      "Australia/Perth",
-                                      "Australia/Queensland",
-                                      "Australia/South",
-                                      "Australia/Sydney",
-                                      "Australia/Tasmania",
-                                      "Australia/Victoria",
-                                      "Australia/West",
-                                      "Australia/Yancowinna",
-                                      "Brazil/Acre",
-                                      "Brazil/DeNoronha",
-                                      "Brazil/East",
-                                      "Brazil/West",
-                                      "CET",
-                                      "CST6CDT",
-                                      "Canada/Atlantic",
-                                      "Canada/Central",
-                                      "Canada/Eastern",
-                                      "Canada/Mountain",
-                                      "Canada/Newfoundland",
-                                      "Canada/Pacific",
-                                      "Canada/Saskatchewan",
-                                      "Canada/Yukon",
-                                      "Chile/Continental",
-                                      "Chile/EasterIsland",
-                                      "Cuba",
-                                      "EET",
-                                      "EST",
-                                      "EST5EDT",
-                                      "Egypt",
-                                      "Eire",
-                                      "Etc/GMT",
-                                      "Etc/GMT+0",
-                                      "Etc/GMT+1",
-                                      "Etc/GMT+10",
-                                      "Etc/GMT+11",
-                                      "Etc/GMT+12",
-                                      "Etc/GMT+2",
-                                      "Etc/GMT+3",
-                                      "Etc/GMT+4",
-                                      "Etc/GMT+5",
-                                      "Etc/GMT+6",
-                                      "Etc/GMT+7",
-                                      "Etc/GMT+8",
-                                      "Etc/GMT+9",
-                                      "Etc/GMT-0",
-                                      "Etc/GMT-1",
-                                      "Etc/GMT-10",
-                                      "Etc/GMT-11",
-                                      "Etc/GMT-12",
-                                      "Etc/GMT-13",
-                                      "Etc/GMT-14",
-                                      "Etc/GMT-2",
-                                      "Etc/GMT-3",
-                                      "Etc/GMT-4",
-                                      "Etc/GMT-5",
-                                      "Etc/GMT-6",
-                                      "Etc/GMT-7",
-                                      "Etc/GMT-8",
-                                      "Etc/GMT-9",
-                                      "Etc/GMT0",
-                                      "Etc/Greenwich",
-                                      "Etc/UCT",
-                                      "Etc/UTC",
-                                      "Etc/Universal",
-                                      "Etc/Zulu",
-                                      "Europe/Amsterdam",
-                                      "Europe/Andorra",
-                                      "Europe/Astrakhan",
-                                      "Europe/Athens",
-                                      "Europe/Belfast",
-                                      "Europe/Belgrade",
-                                      "Europe/Berlin",
-                                      "Europe/Bratislava",
-                                      "Europe/Brussels",
-                                      "Europe/Bucharest",
-                                      "Europe/Budapest",
-                                      "Europe/Busingen",
-                                      "Europe/Chisinau",
-                                      "Europe/Copenhagen",
-                                      "Europe/Dublin",
-                                      "Europe/Gibraltar",
-                                      "Europe/Guernsey",
-                                      "Europe/Helsinki",
-                                      "Europe/Isle_of_Man",
-                                      "Europe/Istanbul",
-                                      "Europe/Jersey",
-                                      "Europe/Kaliningrad",
-                                      "Europe/Kiev",
-                                      "Europe/Kirov",
-                                      "Europe/Lisbon",
-                                      "Europe/Ljubljana",
-                                      "Europe/London",
-                                      "Europe/Luxembourg",
-                                      "Europe/Madrid",
-                                      "Europe/Malta",
-                                      "Europe/Mariehamn",
-                                      "Europe/Minsk",
-                                      "Europe/Monaco",
-                                      "Europe/Moscow",
-                                      "Europe/Nicosia",
-                                      "Europe/Oslo",
-                                      "Europe/Paris",
-                                      "Europe/Podgorica",
-                                      "Europe/Prague",
-                                      "Europe/Riga",
-                                      "Europe/Rome",
-                                      "Europe/Samara",
-                                      "Europe/San_Marino",
-                                      "Europe/Sarajevo",
-                                      "Europe/Saratov",
-                                      "Europe/Simferopol",
-                                      "Europe/Skopje",
-                                      "Europe/Sofia",
-                                      "Europe/Stockholm",
-                                      "Europe/Tallinn",
-                                      "Europe/Tirane",
-                                      "Europe/Tiraspol",
-                                      "Europe/Ulyanovsk",
-                                      "Europe/Uzhgorod",
-                                      "Europe/Vaduz",
-                                      "Europe/Vatican",
-                                      "Europe/Vienna",
-                                      "Europe/Vilnius",
-                                      "Europe/Volgograd",
-                                      "Europe/Warsaw",
-                                      "Europe/Zagreb",
-                                      "Europe/Zaporozhye",
-                                      "Europe/Zurich",
-                                      "GB",
-                                      "GB-Eire",
-                                      "GMT",
-                                      "GMT+0",
-                                      "GMT-0",
-                                      "GMT0",
-                                      "Greenwich",
-                                      "HST",
-                                      "Hongkong",
-                                      "Iceland",
-                                      "Indian/Antananarivo",
-                                      "Indian/Chagos",
-                                      "Indian/Christmas",
-                                      "Indian/Cocos",
-                                      "Indian/Comoro",
-                                      "Indian/Kerguelen",
-                                      "Indian/Mahe",
-                                      "Indian/Maldives",
-                                      "Indian/Mauritius",
-                                      "Indian/Mayotte",
-                                      "Indian/Reunion",
-                                      "Iran",
-                                      "Israel",
-                                      "Jamaica",
-                                      "Japan",
-                                      "Kwajalein",
-                                      "Libya",
-                                      "MET",
-                                      "MST",
-                                      "MST7MDT",
-                                      "Mexico/BajaNorte",
-                                      "Mexico/BajaSur",
-                                      "Mexico/General",
-                                      "NZ",
-                                      "NZ-CHAT",
-                                      "Navajo",
-                                      "PRC",
-                                      "PST8PDT",
-                                      "Pacific/Apia",
-                                      "Pacific/Auckland",
-                                      "Pacific/Bougainville",
-                                      "Pacific/Chatham",
-                                      "Pacific/Chuuk",
-                                      "Pacific/Easter",
-                                      "Pacific/Efate",
-                                      "Pacific/Enderbury",
-                                      "Pacific/Fakaofo",
-                                      "Pacific/Fiji",
-                                      "Pacific/Funafuti",
-                                      "Pacific/Galapagos",
-                                      "Pacific/Gambier",
-                                      "Pacific/Guadalcanal",
-                                      "Pacific/Guam",
-                                      "Pacific/Honolulu",
-                                      "Pacific/Johnston",
-                                      "Pacific/Kiritimati",
-                                      "Pacific/Kosrae",
-                                      "Pacific/Kwajalein",
-                                      "Pacific/Majuro",
-                                      "Pacific/Marquesas",
-                                      "Pacific/Midway",
-                                      "Pacific/Nauru",
-                                      "Pacific/Niue",
-                                      "Pacific/Norfolk",
-                                      "Pacific/Noumea",
-                                      "Pacific/Pago_Pago",
-                                      "Pacific/Palau",
-                                      "Pacific/Pitcairn",
-                                      "Pacific/Pohnpei",
-                                      "Pacific/Ponape",
-                                      "Pacific/Port_Moresby",
-                                      "Pacific/Rarotonga",
-                                      "Pacific/Saipan",
-                                      "Pacific/Samoa",
-                                      "Pacific/Tahiti",
-                                      "Pacific/Tarawa",
-                                      "Pacific/Tongatapu",
-                                      "Pacific/Truk",
-                                      "Pacific/Wake",
-                                      "Pacific/Wallis",
-                                      "Pacific/Yap",
-                                      "Poland",
-                                      "Portugal",
-                                      "ROC",
-                                      "ROK",
-                                      "Singapore",
-                                      "Turkey",
-                                      "UCT",
-                                      "US/Alaska",
-                                      "US/Aleutian",
-                                      "US/Arizona",
-                                      "US/Central",
-                                      "US/East-Indiana",
-                                      "US/Eastern",
-                                      "US/Hawaii",
-                                      "US/Indiana-Starke",
-                                      "US/Michigan",
-                                      "US/Mountain",
-                                      "US/Pacific",
-                                      "US/Samoa",
-                                      "UTC",
-                                      "Universal",
-                                      "W-SU",
-                                      "WET",
-                                      "Zulu",
-                                      nullptr};
-
-std::vector<std::string> AllTimeZoneNames() {
-  std::vector<std::string> names;
-  for (const char* const* namep = kTimeZoneNames; *namep != nullptr; ++namep) {
-    names.push_back(std::string("file:") + *namep);
-  }
-  assert(!names.empty());
-
-  std::mt19937 urbg(42);  // a UniformRandomBitGenerator with fixed seed
-  std::shuffle(names.begin(), names.end(), urbg);
-  return names;
-}
-
-cctz::time_zone TestTimeZone() {
-  cctz::time_zone tz;
-  cctz::load_time_zone("America/Los_Angeles", &tz);
-  return tz;
-}
-
-void BM_Zone_LoadUTCTimeZoneFirst(benchmark::State& state) {
-  cctz::time_zone tz;
-  cctz::load_time_zone("UTC", &tz);  // in case we're first
-  cctz::time_zone::Impl::ClearTimeZoneMapTestOnly();
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::load_time_zone("UTC", &tz));
-  }
-}
-BENCHMARK(BM_Zone_LoadUTCTimeZoneFirst);
-
-void BM_Zone_LoadUTCTimeZoneLast(benchmark::State& state) {
-  cctz::time_zone tz;
-  for (const auto& name : AllTimeZoneNames()) {
-    cctz::load_time_zone(name, &tz);  // prime cache
-  }
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::load_time_zone("UTC", &tz));
-  }
-}
-BENCHMARK(BM_Zone_LoadUTCTimeZoneLast);
-
-void BM_Zone_LoadTimeZoneFirst(benchmark::State& state) {
-  cctz::time_zone tz = cctz::utc_time_zone();  // in case we're first
-  const std::string name = "file:America/Los_Angeles";
-  while (state.KeepRunning()) {
-    state.PauseTiming();
-    cctz::time_zone::Impl::ClearTimeZoneMapTestOnly();
-    state.ResumeTiming();
-    benchmark::DoNotOptimize(cctz::load_time_zone(name, &tz));
-  }
-}
-BENCHMARK(BM_Zone_LoadTimeZoneFirst);
-
-void BM_Zone_LoadTimeZoneCached(benchmark::State& state) {
-  cctz::time_zone tz = cctz::utc_time_zone();  // in case we're first
-  cctz::time_zone::Impl::ClearTimeZoneMapTestOnly();
-  const std::string name = "file:America/Los_Angeles";
-  cctz::load_time_zone(name, &tz);  // prime cache
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::load_time_zone(name, &tz));
-  }
-}
-BENCHMARK(BM_Zone_LoadTimeZoneCached);
-
-void BM_Zone_LoadLocalTimeZoneCached(benchmark::State& state) {
-  cctz::utc_time_zone();  // in case we're first
-  cctz::time_zone::Impl::ClearTimeZoneMapTestOnly();
-  cctz::local_time_zone();  // prime cache
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::local_time_zone());
-  }
-}
-BENCHMARK(BM_Zone_LoadLocalTimeZoneCached);
-
-void BM_Zone_LoadAllTimeZonesFirst(benchmark::State& state) {
-  cctz::time_zone tz;
-  const std::vector<std::string> names = AllTimeZoneNames();
-  for (auto index = names.size(); state.KeepRunning(); ++index) {
-    if (index == names.size()) {
-      index = 0;
-    }
-    if (index == 0) {
-      state.PauseTiming();
-      cctz::time_zone::Impl::ClearTimeZoneMapTestOnly();
-      state.ResumeTiming();
-    }
-    benchmark::DoNotOptimize(cctz::load_time_zone(names[index], &tz));
-  }
-}
-BENCHMARK(BM_Zone_LoadAllTimeZonesFirst);
-
-void BM_Zone_LoadAllTimeZonesCached(benchmark::State& state) {
-  cctz::time_zone tz;
-  const std::vector<std::string> names = AllTimeZoneNames();
-  for (const auto& name : names) {
-    cctz::load_time_zone(name, &tz);  // prime cache
-  }
-  for (auto index = names.size(); state.KeepRunning(); ++index) {
-    if (index == names.size()) {
-      index = 0;
-    }
-    benchmark::DoNotOptimize(cctz::load_time_zone(names[index], &tz));
-  }
-}
-BENCHMARK(BM_Zone_LoadAllTimeZonesCached);
-
-void BM_Zone_TimeZoneEqualityImplicit(benchmark::State& state) {
-  cctz::time_zone tz;  // implicit UTC
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(tz == tz);
-  }
-}
-BENCHMARK(BM_Zone_TimeZoneEqualityImplicit);
-
-void BM_Zone_TimeZoneEqualityExplicit(benchmark::State& state) {
-  cctz::time_zone tz = cctz::utc_time_zone();  // explicit UTC
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(tz == tz);
-  }
-}
-BENCHMARK(BM_Zone_TimeZoneEqualityExplicit);
-
-void BM_Zone_UTCTimeZone(benchmark::State& state) {
-  cctz::time_zone tz;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::utc_time_zone());
-  }
-}
-BENCHMARK(BM_Zone_UTCTimeZone);
-
-// In each "ToCivil" benchmark we switch between two instants separated
-// by at least one transition in order to defeat any internal caching of
-// previous results (e.g., see local_time_hint_).
-//
-// The "UTC" variants use UTC instead of the Google/local time zone.
-
-void BM_Time_ToCivil_CCTZ(benchmark::State& state) {
-  const cctz::time_zone tz = TestTimeZone();
-  std::chrono::system_clock::time_point tp =
-      std::chrono::system_clock::from_time_t(1384569027);
-  std::chrono::system_clock::time_point tp2 =
-      std::chrono::system_clock::from_time_t(1418962578);
-  while (state.KeepRunning()) {
-    std::swap(tp, tp2);
-    tp += std::chrono::seconds(1);
-    benchmark::DoNotOptimize(cctz::convert(tp, tz));
-  }
-}
-BENCHMARK(BM_Time_ToCivil_CCTZ);
-
-void BM_Time_ToCivil_Libc(benchmark::State& state) {
-  // No timezone support, so just use localtime.
-  time_t t = 1384569027;
-  time_t t2 = 1418962578;
-  struct tm tm;
-  while (state.KeepRunning()) {
-    std::swap(t, t2);
-    t += 1;
-#if defined(_WIN32) || defined(_WIN64)
-    benchmark::DoNotOptimize(localtime_s(&tm, &t));
-#else
-    benchmark::DoNotOptimize(localtime_r(&t, &tm));
-#endif
-  }
-}
-BENCHMARK(BM_Time_ToCivil_Libc);
-
-void BM_Time_ToCivilUTC_CCTZ(benchmark::State& state) {
-  const cctz::time_zone tz = cctz::utc_time_zone();
-  std::chrono::system_clock::time_point tp =
-      std::chrono::system_clock::from_time_t(1384569027);
-  while (state.KeepRunning()) {
-    tp += std::chrono::seconds(1);
-    benchmark::DoNotOptimize(cctz::convert(tp, tz));
-  }
-}
-BENCHMARK(BM_Time_ToCivilUTC_CCTZ);
-
-void BM_Time_ToCivilUTC_Libc(benchmark::State& state) {
-  time_t t = 1384569027;
-  struct tm tm;
-  while (state.KeepRunning()) {
-    t += 1;
-#if defined(_WIN32) || defined(_WIN64)
-    benchmark::DoNotOptimize(gmtime_s(&tm, &t));
-#else
-    benchmark::DoNotOptimize(gmtime_r(&t, &tm));
-#endif
-  }
-}
-BENCHMARK(BM_Time_ToCivilUTC_Libc);
-
-// In each "FromCivil" benchmark we switch between two YMDhms values
-// separated by at least one transition in order to defeat any internal
-// caching of previous results (e.g., see time_local_hint_).
-//
-// The "UTC" variants use UTC instead of the Google/local time zone.
-// The "Day0" variants require normalization of the day of month.
-
-void BM_Time_FromCivil_CCTZ(benchmark::State& state) {
-  const cctz::time_zone tz = TestTimeZone();
-  int i = 0;
-  while (state.KeepRunning()) {
-    if ((i++ & 1) == 0) {
-      benchmark::DoNotOptimize(
-          cctz::convert(cctz::civil_second(2014, 12, 18, 20, 16, 18), tz));
-    } else {
-      benchmark::DoNotOptimize(
-          cctz::convert(cctz::civil_second(2013, 11, 15, 18, 30, 27), tz));
-    }
-  }
-}
-BENCHMARK(BM_Time_FromCivil_CCTZ);
-
-void BM_Time_FromCivil_Libc(benchmark::State& state) {
-  // No timezone support, so just use localtime.
-  int i = 0;
-  while (state.KeepRunning()) {
-    struct tm tm;
-    if ((i++ & 1) == 0) {
-      tm.tm_year = 2014 - 1900;
-      tm.tm_mon = 12 - 1;
-      tm.tm_mday = 18;
-      tm.tm_hour = 20;
-      tm.tm_min = 16;
-      tm.tm_sec = 18;
-    } else {
-      tm.tm_year = 2013 - 1900;
-      tm.tm_mon = 11 - 1;
-      tm.tm_mday = 15;
-      tm.tm_hour = 18;
-      tm.tm_min = 30;
-      tm.tm_sec = 27;
-    }
-    tm.tm_isdst = -1;
-    benchmark::DoNotOptimize(mktime(&tm));
-  }
-}
-BENCHMARK(BM_Time_FromCivil_Libc);
-
-void BM_Time_FromCivilUTC_CCTZ(benchmark::State& state) {
-  const cctz::time_zone tz = cctz::utc_time_zone();
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(
-        cctz::convert(cctz::civil_second(2014, 12, 18, 20, 16, 18), tz));
-  }
-}
-BENCHMARK(BM_Time_FromCivilUTC_CCTZ);
-
-// There is no BM_Time_FromCivilUTC_Libc.
-
-void BM_Time_FromCivilDay0_CCTZ(benchmark::State& state) {
-  const cctz::time_zone tz = TestTimeZone();
-  int i = 0;
-  while (state.KeepRunning()) {
-    if ((i++ & 1) == 0) {
-      benchmark::DoNotOptimize(
-          cctz::convert(cctz::civil_second(2014, 12, 0, 20, 16, 18), tz));
-    } else {
-      benchmark::DoNotOptimize(
-          cctz::convert(cctz::civil_second(2013, 11, 0, 18, 30, 27), tz));
-    }
-  }
-}
-BENCHMARK(BM_Time_FromCivilDay0_CCTZ);
-
-void BM_Time_FromCivilDay0_Libc(benchmark::State& state) {
-  // No timezone support, so just use localtime.
-  int i = 0;
-  while (state.KeepRunning()) {
-    struct tm tm;
-    if ((i++ & 1) == 0) {
-      tm.tm_year = 2014 - 1900;
-      tm.tm_mon = 12 - 1;
-      tm.tm_mday = 0;
-      tm.tm_hour = 20;
-      tm.tm_min = 16;
-      tm.tm_sec = 18;
-    } else {
-      tm.tm_year = 2013 - 1900;
-      tm.tm_mon = 11 - 1;
-      tm.tm_mday = 0;
-      tm.tm_hour = 18;
-      tm.tm_min = 30;
-      tm.tm_sec = 27;
-    }
-    tm.tm_isdst = -1;
-    benchmark::DoNotOptimize(mktime(&tm));
-  }
-}
-BENCHMARK(BM_Time_FromCivilDay0_Libc);
-
-const char* const kFormats[] = {
-    RFC1123_full,           // 0
-    RFC1123_no_wday,        // 1
-    RFC3339_full,           // 2
-    RFC3339_sec,            // 3
-    "%Y-%m-%d%ET%H:%M:%S",  // 4
-    "%Y-%m-%d",             // 5
-};
-const int kNumFormats = sizeof(kFormats) / sizeof(kFormats[0]);
-
-void BM_Format_FormatTime(benchmark::State& state) {
-  const std::string fmt = kFormats[state.range(0)];
-  state.SetLabel(fmt);
-  const cctz::time_zone tz = TestTimeZone();
-  const std::chrono::system_clock::time_point tp =
-      cctz::convert(cctz::civil_second(1977, 6, 28, 9, 8, 7), tz) +
-      std::chrono::microseconds(1);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::format(fmt, tp, tz));
-  }
-}
-BENCHMARK(BM_Format_FormatTime)->DenseRange(0, kNumFormats - 1);
-
-void BM_Format_ParseTime(benchmark::State& state) {
-  const std::string fmt = kFormats[state.range(0)];
-  state.SetLabel(fmt);
-  const cctz::time_zone tz = TestTimeZone();
-  std::chrono::system_clock::time_point tp =
-      cctz::convert(cctz::civil_second(1977, 6, 28, 9, 8, 7), tz) +
-      std::chrono::microseconds(1);
-  const std::string when = cctz::format(fmt, tp, tz);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(cctz::parse(fmt, when, tz, &tp));
-  }
-}
-BENCHMARK(BM_Format_ParseTime)->DenseRange(0, kNumFormats - 1);
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/internal/cctz/src/civil_time_detail.cc b/third_party/abseil/absl/time/internal/cctz/src/civil_time_detail.cc
deleted file mode 100644
index 0b07e39..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/civil_time_detail.cc
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "absl/time/internal/cctz/include/cctz/civil_time_detail.h"
-
-#include <iomanip>
-#include <ostream>
-#include <sstream>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-namespace detail {
-
-// Output stream operators output a format matching YYYY-MM-DDThh:mm:ss,
-// while omitting fields inferior to the type's alignment. For example,
-// civil_day is formatted only as YYYY-MM-DD.
-std::ostream& operator<<(std::ostream& os, const civil_year& y) {
-  std::stringstream ss;
-  ss << y.year();  // No padding.
-  return os << ss.str();
-}
-std::ostream& operator<<(std::ostream& os, const civil_month& m) {
-  std::stringstream ss;
-  ss << civil_year(m) << '-';
-  ss << std::setfill('0') << std::setw(2) << m.month();
-  return os << ss.str();
-}
-std::ostream& operator<<(std::ostream& os, const civil_day& d) {
-  std::stringstream ss;
-  ss << civil_month(d) << '-';
-  ss << std::setfill('0') << std::setw(2) << d.day();
-  return os << ss.str();
-}
-std::ostream& operator<<(std::ostream& os, const civil_hour& h) {
-  std::stringstream ss;
-  ss << civil_day(h) << 'T';
-  ss << std::setfill('0') << std::setw(2) << h.hour();
-  return os << ss.str();
-}
-std::ostream& operator<<(std::ostream& os, const civil_minute& m) {
-  std::stringstream ss;
-  ss << civil_hour(m) << ':';
-  ss << std::setfill('0') << std::setw(2) << m.minute();
-  return os << ss.str();
-}
-std::ostream& operator<<(std::ostream& os, const civil_second& s) {
-  std::stringstream ss;
-  ss << civil_minute(s) << ':';
-  ss << std::setfill('0') << std::setw(2) << s.second();
-  return os << ss.str();
-}
-
-////////////////////////////////////////////////////////////////////////
-
-std::ostream& operator<<(std::ostream& os, weekday wd) {
-  switch (wd) {
-    case weekday::monday:
-      return os << "Monday";
-    case weekday::tuesday:
-      return os << "Tuesday";
-    case weekday::wednesday:
-      return os << "Wednesday";
-    case weekday::thursday:
-      return os << "Thursday";
-    case weekday::friday:
-      return os << "Friday";
-    case weekday::saturday:
-      return os << "Saturday";
-    case weekday::sunday:
-      return os << "Sunday";
-  }
-  return os;  // Should never get here, but -Wreturn-type may warn without this.
-}
-
-}  // namespace detail
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/civil_time_test.cc b/third_party/abseil/absl/time/internal/cctz/src/civil_time_test.cc
deleted file mode 100644
index a5a7123..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/civil_time_test.cc
+++ /dev/null
@@ -1,1066 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-
-#include <iomanip>
-#include <limits>
-#include <sstream>
-#include <string>
-#include <type_traits>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-template <typename T>
-std::string Format(const T& t) {
-  std::stringstream ss;
-  ss << t;
-  return ss.str();
-}
-
-}  // namespace
-
-#if __cpp_constexpr >= 201304 || (defined(_MSC_VER) && _MSC_VER >= 1910)
-// Construction constexpr tests
-
-TEST(CivilTime, Normal) {
-  constexpr civil_second css(2016, 1, 28, 17, 14, 12);
-  static_assert(css.second() == 12, "Normal.second");
-  constexpr civil_minute cmm(2016, 1, 28, 17, 14);
-  static_assert(cmm.minute() == 14, "Normal.minute");
-  constexpr civil_hour chh(2016, 1, 28, 17);
-  static_assert(chh.hour() == 17, "Normal.hour");
-  constexpr civil_day cd(2016, 1, 28);
-  static_assert(cd.day() == 28, "Normal.day");
-  constexpr civil_month cm(2016, 1);
-  static_assert(cm.month() == 1, "Normal.month");
-  constexpr civil_year cy(2016);
-  static_assert(cy.year() == 2016, "Normal.year");
-}
-
-TEST(CivilTime, Conversion) {
-  constexpr civil_year cy(2016);
-  static_assert(cy.year() == 2016, "Conversion.year");
-  constexpr civil_month cm(cy);
-  static_assert(cm.month() == 1, "Conversion.month");
-  constexpr civil_day cd(cm);
-  static_assert(cd.day() == 1, "Conversion.day");
-  constexpr civil_hour chh(cd);
-  static_assert(chh.hour() == 0, "Conversion.hour");
-  constexpr civil_minute cmm(chh);
-  static_assert(cmm.minute() == 0, "Conversion.minute");
-  constexpr civil_second css(cmm);
-  static_assert(css.second() == 0, "Conversion.second");
-}
-
-// Normalization constexpr tests
-
-TEST(CivilTime, Normalized) {
-  constexpr civil_second cs(2016, 1, 28, 17, 14, 12);
-  static_assert(cs.year() == 2016, "Normalized.year");
-  static_assert(cs.month() == 1, "Normalized.month");
-  static_assert(cs.day() == 28, "Normalized.day");
-  static_assert(cs.hour() == 17, "Normalized.hour");
-  static_assert(cs.minute() == 14, "Normalized.minute");
-  static_assert(cs.second() == 12, "Normalized.second");
-}
-
-TEST(CivilTime, SecondOverflow) {
-  constexpr civil_second cs(2016, 1, 28, 17, 14, 121);
-  static_assert(cs.year() == 2016, "SecondOverflow.year");
-  static_assert(cs.month() == 1, "SecondOverflow.month");
-  static_assert(cs.day() == 28, "SecondOverflow.day");
-  static_assert(cs.hour() == 17, "SecondOverflow.hour");
-  static_assert(cs.minute() == 16, "SecondOverflow.minute");
-  static_assert(cs.second() == 1, "SecondOverflow.second");
-}
-
-TEST(CivilTime, SecondUnderflow) {
-  constexpr civil_second cs(2016, 1, 28, 17, 14, -121);
-  static_assert(cs.year() == 2016, "SecondUnderflow.year");
-  static_assert(cs.month() == 1, "SecondUnderflow.month");
-  static_assert(cs.day() == 28, "SecondUnderflow.day");
-  static_assert(cs.hour() == 17, "SecondUnderflow.hour");
-  static_assert(cs.minute() == 11, "SecondUnderflow.minute");
-  static_assert(cs.second() == 59, "SecondUnderflow.second");
-}
-
-TEST(CivilTime, MinuteOverflow) {
-  constexpr civil_second cs(2016, 1, 28, 17, 121, 12);
-  static_assert(cs.year() == 2016, "MinuteOverflow.year");
-  static_assert(cs.month() == 1, "MinuteOverflow.month");
-  static_assert(cs.day() == 28, "MinuteOverflow.day");
-  static_assert(cs.hour() == 19, "MinuteOverflow.hour");
-  static_assert(cs.minute() == 1, "MinuteOverflow.minute");
-  static_assert(cs.second() == 12, "MinuteOverflow.second");
-}
-
-TEST(CivilTime, MinuteUnderflow) {
-  constexpr civil_second cs(2016, 1, 28, 17, -121, 12);
-  static_assert(cs.year() == 2016, "MinuteUnderflow.year");
-  static_assert(cs.month() == 1, "MinuteUnderflow.month");
-  static_assert(cs.day() == 28, "MinuteUnderflow.day");
-  static_assert(cs.hour() == 14, "MinuteUnderflow.hour");
-  static_assert(cs.minute() == 59, "MinuteUnderflow.minute");
-  static_assert(cs.second() == 12, "MinuteUnderflow.second");
-}
-
-TEST(CivilTime, HourOverflow) {
-  constexpr civil_second cs(2016, 1, 28, 49, 14, 12);
-  static_assert(cs.year() == 2016, "HourOverflow.year");
-  static_assert(cs.month() == 1, "HourOverflow.month");
-  static_assert(cs.day() == 30, "HourOverflow.day");
-  static_assert(cs.hour() == 1, "HourOverflow.hour");
-  static_assert(cs.minute() == 14, "HourOverflow.minute");
-  static_assert(cs.second() == 12, "HourOverflow.second");
-}
-
-TEST(CivilTime, HourUnderflow) {
-  constexpr civil_second cs(2016, 1, 28, -49, 14, 12);
-  static_assert(cs.year() == 2016, "HourUnderflow.year");
-  static_assert(cs.month() == 1, "HourUnderflow.month");
-  static_assert(cs.day() == 25, "HourUnderflow.day");
-  static_assert(cs.hour() == 23, "HourUnderflow.hour");
-  static_assert(cs.minute() == 14, "HourUnderflow.minute");
-  static_assert(cs.second() == 12, "HourUnderflow.second");
-}
-
-TEST(CivilTime, MonthOverflow) {
-  constexpr civil_second cs(2016, 25, 28, 17, 14, 12);
-  static_assert(cs.year() == 2018, "MonthOverflow.year");
-  static_assert(cs.month() == 1, "MonthOverflow.month");
-  static_assert(cs.day() == 28, "MonthOverflow.day");
-  static_assert(cs.hour() == 17, "MonthOverflow.hour");
-  static_assert(cs.minute() == 14, "MonthOverflow.minute");
-  static_assert(cs.second() == 12, "MonthOverflow.second");
-}
-
-TEST(CivilTime, MonthUnderflow) {
-  constexpr civil_second cs(2016, -25, 28, 17, 14, 12);
-  static_assert(cs.year() == 2013, "MonthUnderflow.year");
-  static_assert(cs.month() == 11, "MonthUnderflow.month");
-  static_assert(cs.day() == 28, "MonthUnderflow.day");
-  static_assert(cs.hour() == 17, "MonthUnderflow.hour");
-  static_assert(cs.minute() == 14, "MonthUnderflow.minute");
-  static_assert(cs.second() == 12, "MonthUnderflow.second");
-}
-
-TEST(CivilTime, C4Overflow) {
-  constexpr civil_second cs(2016, 1, 292195, 17, 14, 12);
-  static_assert(cs.year() == 2816, "C4Overflow.year");
-  static_assert(cs.month() == 1, "C4Overflow.month");
-  static_assert(cs.day() == 1, "C4Overflow.day");
-  static_assert(cs.hour() == 17, "C4Overflow.hour");
-  static_assert(cs.minute() == 14, "C4Overflow.minute");
-  static_assert(cs.second() == 12, "C4Overflow.second");
-}
-
-TEST(CivilTime, C4Underflow) {
-  constexpr civil_second cs(2016, 1, -292195, 17, 14, 12);
-  static_assert(cs.year() == 1215, "C4Underflow.year");
-  static_assert(cs.month() == 12, "C4Underflow.month");
-  static_assert(cs.day() == 30, "C4Underflow.day");
-  static_assert(cs.hour() == 17, "C4Underflow.hour");
-  static_assert(cs.minute() == 14, "C4Underflow.minute");
-  static_assert(cs.second() == 12, "C4Underflow.second");
-}
-
-TEST(CivilTime, MixedNormalization) {
-  constexpr civil_second cs(2016, -42, 122, 99, -147, 4949);
-  static_assert(cs.year() == 2012, "MixedNormalization.year");
-  static_assert(cs.month() == 10, "MixedNormalization.month");
-  static_assert(cs.day() == 4, "MixedNormalization.day");
-  static_assert(cs.hour() == 1, "MixedNormalization.hour");
-  static_assert(cs.minute() == 55, "MixedNormalization.minute");
-  static_assert(cs.second() == 29, "MixedNormalization.second");
-}
-
-// Relational constexpr tests
-
-TEST(CivilTime, Less) {
-  constexpr civil_second cs1(2016, 1, 28, 17, 14, 12);
-  constexpr civil_second cs2(2016, 1, 28, 17, 14, 13);
-  constexpr bool less = cs1 < cs2;
-  static_assert(less, "Less");
-}
-
-// Arithmetic constexpr tests
-
-TEST(CivilTime, Addition) {
-  constexpr civil_second cs1(2016, 1, 28, 17, 14, 12);
-  constexpr civil_second cs2 = cs1 + 50;
-  static_assert(cs2.year() == 2016, "Addition.year");
-  static_assert(cs2.month() == 1, "Addition.month");
-  static_assert(cs2.day() == 28, "Addition.day");
-  static_assert(cs2.hour() == 17, "Addition.hour");
-  static_assert(cs2.minute() == 15, "Addition.minute");
-  static_assert(cs2.second() == 2, "Addition.second");
-}
-
-TEST(CivilTime, Subtraction) {
-  constexpr civil_second cs1(2016, 1, 28, 17, 14, 12);
-  constexpr civil_second cs2 = cs1 - 50;
-  static_assert(cs2.year() == 2016, "Subtraction.year");
-  static_assert(cs2.month() == 1, "Subtraction.month");
-  static_assert(cs2.day() == 28, "Subtraction.day");
-  static_assert(cs2.hour() == 17, "Subtraction.hour");
-  static_assert(cs2.minute() == 13, "Subtraction.minute");
-  static_assert(cs2.second() == 22, "Subtraction.second");
-}
-
-TEST(CivilTime, Difference) {
-  constexpr civil_day cd1(2016, 1, 28);
-  constexpr civil_day cd2(2015, 1, 28);
-  constexpr int diff = cd1 - cd2;
-  static_assert(diff == 365, "Difference");
-}
-
-// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
-TEST(CivilTime, ConstructionWithHugeYear) {
-  constexpr civil_hour h(-9223372036854775807, 1, 1, -1);
-  static_assert(h.year() == -9223372036854775807 - 1,
-                "ConstructionWithHugeYear");
-  static_assert(h.month() == 12, "ConstructionWithHugeYear");
-  static_assert(h.day() == 31, "ConstructionWithHugeYear");
-  static_assert(h.hour() == 23, "ConstructionWithHugeYear");
-}
-
-// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
-TEST(CivilTime, DifferenceWithHugeYear) {
-  {
-    constexpr civil_day d1(9223372036854775807, 1, 1);
-    constexpr civil_day d2(9223372036854775807, 12, 31);
-    static_assert(d2 - d1 == 364, "DifferenceWithHugeYear");
-  }
-  {
-    constexpr civil_day d1(-9223372036854775807 - 1, 1, 1);
-    constexpr civil_day d2(-9223372036854775807 - 1, 12, 31);
-    static_assert(d2 - d1 == 365, "DifferenceWithHugeYear");
-  }
-  {
-    // Check the limits of the return value at the end of the year range.
-    constexpr civil_day d1(9223372036854775807, 1, 1);
-    constexpr civil_day d2(9198119301927009252, 6, 6);
-    static_assert(d1 - d2 == 9223372036854775807, "DifferenceWithHugeYear");
-    static_assert((d2 - 1) - d1 == -9223372036854775807 - 1,
-                  "DifferenceWithHugeYear");
-  }
-  {
-    // Check the limits of the return value at the start of the year range.
-    constexpr civil_day d1(-9223372036854775807 - 1, 1, 1);
-    constexpr civil_day d2(-9198119301927009254, 7, 28);
-    static_assert(d2 - d1 == 9223372036854775807, "DifferenceWithHugeYear");
-    static_assert(d1 - (d2 + 1) == -9223372036854775807 - 1,
-                  "DifferenceWithHugeYear");
-  }
-  {
-    // Check the limits of the return value from either side of year 0.
-    constexpr civil_day d1(-12626367463883278, 9, 3);
-    constexpr civil_day d2(12626367463883277, 3, 28);
-    static_assert(d2 - d1 == 9223372036854775807, "DifferenceWithHugeYear");
-    static_assert(d1 - (d2 + 1) == -9223372036854775807 - 1,
-                  "DifferenceWithHugeYear");
-  }
-}
-
-// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
-TEST(CivilTime, DifferenceNoIntermediateOverflow) {
-  {
-    // The difference up to the minute field would be below the minimum
-    // diff_t, but the 52 extra seconds brings us back to the minimum.
-    constexpr civil_second s1(-292277022657, 1, 27, 8, 29 - 1, 52);
-    constexpr civil_second s2(1970, 1, 1, 0, 0 - 1, 0);
-    static_assert(s1 - s2 == -9223372036854775807 - 1,
-                  "DifferenceNoIntermediateOverflow");
-  }
-  {
-    // The difference up to the minute field would be above the maximum
-    // diff_t, but the -53 extra seconds brings us back to the maximum.
-    constexpr civil_second s1(292277026596, 12, 4, 15, 30, 7 - 7);
-    constexpr civil_second s2(1970, 1, 1, 0, 0, 0 - 7);
-    static_assert(s1 - s2 == 9223372036854775807,
-                  "DifferenceNoIntermediateOverflow");
-  }
-}
-
-// Helper constexpr tests
-
-TEST(CivilTime, WeekDay) {
-  constexpr civil_day cd(2016, 1, 28);
-  constexpr weekday wd = get_weekday(cd);
-  static_assert(wd == weekday::thursday, "Weekday");
-}
-
-TEST(CivilTime, NextWeekDay) {
-  constexpr civil_day cd(2016, 1, 28);
-  constexpr civil_day next = next_weekday(cd, weekday::thursday);
-  static_assert(next.year() == 2016, "NextWeekDay.year");
-  static_assert(next.month() == 2, "NextWeekDay.month");
-  static_assert(next.day() == 4, "NextWeekDay.day");
-}
-
-TEST(CivilTime, PrevWeekDay) {
-  constexpr civil_day cd(2016, 1, 28);
-  constexpr civil_day prev = prev_weekday(cd, weekday::thursday);
-  static_assert(prev.year() == 2016, "PrevWeekDay.year");
-  static_assert(prev.month() == 1, "PrevWeekDay.month");
-  static_assert(prev.day() == 21, "PrevWeekDay.day");
-}
-
-TEST(CivilTime, YearDay) {
-  constexpr civil_day cd(2016, 1, 28);
-  constexpr int yd = get_yearday(cd);
-  static_assert(yd == 28, "YearDay");
-}
-#endif  // __cpp_constexpr >= 201304 || (defined(_MSC_VER) && _MSC_VER >= 1910)
-
-// The remaining tests do not use constexpr.
-
-TEST(CivilTime, DefaultConstruction) {
-  civil_second ss;
-  EXPECT_EQ("1970-01-01T00:00:00", Format(ss));
-
-  civil_minute mm;
-  EXPECT_EQ("1970-01-01T00:00", Format(mm));
-
-  civil_hour hh;
-  EXPECT_EQ("1970-01-01T00", Format(hh));
-
-  civil_day d;
-  EXPECT_EQ("1970-01-01", Format(d));
-
-  civil_month m;
-  EXPECT_EQ("1970-01", Format(m));
-
-  civil_year y;
-  EXPECT_EQ("1970", Format(y));
-}
-
-TEST(CivilTime, StructMember) {
-  struct S {
-    civil_day day;
-  };
-  S s = {};
-  EXPECT_EQ(civil_day{}, s.day);
-}
-
-TEST(CivilTime, FieldsConstruction) {
-  EXPECT_EQ("2015-01-02T03:04:05", Format(civil_second(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02T03:04:00", Format(civil_second(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02T03:00:00", Format(civil_second(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02T00:00:00", Format(civil_second(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01T00:00:00", Format(civil_second(2015, 1)));
-  EXPECT_EQ("2015-01-01T00:00:00", Format(civil_second(2015)));
-
-  EXPECT_EQ("2015-01-02T03:04", Format(civil_minute(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02T03:04", Format(civil_minute(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02T03:00", Format(civil_minute(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02T00:00", Format(civil_minute(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01T00:00", Format(civil_minute(2015, 1)));
-  EXPECT_EQ("2015-01-01T00:00", Format(civil_minute(2015)));
-
-  EXPECT_EQ("2015-01-02T03", Format(civil_hour(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02T03", Format(civil_hour(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02T03", Format(civil_hour(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02T00", Format(civil_hour(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01T00", Format(civil_hour(2015, 1)));
-  EXPECT_EQ("2015-01-01T00", Format(civil_hour(2015)));
-
-  EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2)));
-  EXPECT_EQ("2015-01-01", Format(civil_day(2015, 1)));
-  EXPECT_EQ("2015-01-01", Format(civil_day(2015)));
-
-  EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2, 3)));
-  EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2)));
-  EXPECT_EQ("2015-01", Format(civil_month(2015, 1)));
-  EXPECT_EQ("2015-01", Format(civil_month(2015)));
-
-  EXPECT_EQ("2015", Format(civil_year(2015, 1, 2, 3, 4, 5)));
-  EXPECT_EQ("2015", Format(civil_year(2015, 1, 2, 3, 4)));
-  EXPECT_EQ("2015", Format(civil_year(2015, 1, 2, 3)));
-  EXPECT_EQ("2015", Format(civil_year(2015, 1, 2)));
-  EXPECT_EQ("2015", Format(civil_year(2015, 1)));
-  EXPECT_EQ("2015", Format(civil_year(2015)));
-}
-
-TEST(CivilTime, FieldsConstructionLimits) {
-  const int kIntMax = std::numeric_limits<int>::max();
-  EXPECT_EQ("2038-01-19T03:14:07",
-            Format(civil_second(1970, 1, 1, 0, 0, kIntMax)));
-  EXPECT_EQ("6121-02-11T05:21:07",
-            Format(civil_second(1970, 1, 1, 0, kIntMax, kIntMax)));
-  EXPECT_EQ("251104-11-20T12:21:07",
-            Format(civil_second(1970, 1, 1, kIntMax, kIntMax, kIntMax)));
-  EXPECT_EQ("6130715-05-30T12:21:07",
-            Format(civil_second(1970, 1, kIntMax, kIntMax, kIntMax, kIntMax)));
-  EXPECT_EQ(
-      "185087685-11-26T12:21:07",
-      Format(civil_second(1970, kIntMax, kIntMax, kIntMax, kIntMax, kIntMax)));
-
-  const int kIntMin = std::numeric_limits<int>::min();
-  EXPECT_EQ("1901-12-13T20:45:52",
-            Format(civil_second(1970, 1, 1, 0, 0, kIntMin)));
-  EXPECT_EQ("-2182-11-20T18:37:52",
-            Format(civil_second(1970, 1, 1, 0, kIntMin, kIntMin)));
-  EXPECT_EQ("-247165-02-11T10:37:52",
-            Format(civil_second(1970, 1, 1, kIntMin, kIntMin, kIntMin)));
-  EXPECT_EQ("-6126776-08-01T10:37:52",
-            Format(civil_second(1970, 1, kIntMin, kIntMin, kIntMin, kIntMin)));
-  EXPECT_EQ(
-      "-185083747-10-31T10:37:52",
-      Format(civil_second(1970, kIntMin, kIntMin, kIntMin, kIntMin, kIntMin)));
-}
-
-TEST(CivilTime, ImplicitCrossAlignment) {
-  civil_year year(2015);
-  civil_month month = year;
-  civil_day day = month;
-  civil_hour hour = day;
-  civil_minute minute = hour;
-  civil_second second = minute;
-
-  second = year;
-  EXPECT_EQ(second, year);
-  second = month;
-  EXPECT_EQ(second, month);
-  second = day;
-  EXPECT_EQ(second, day);
-  second = hour;
-  EXPECT_EQ(second, hour);
-  second = minute;
-  EXPECT_EQ(second, minute);
-
-  minute = year;
-  EXPECT_EQ(minute, year);
-  minute = month;
-  EXPECT_EQ(minute, month);
-  minute = day;
-  EXPECT_EQ(minute, day);
-  minute = hour;
-  EXPECT_EQ(minute, hour);
-
-  hour = year;
-  EXPECT_EQ(hour, year);
-  hour = month;
-  EXPECT_EQ(hour, month);
-  hour = day;
-  EXPECT_EQ(hour, day);
-
-  day = year;
-  EXPECT_EQ(day, year);
-  day = month;
-  EXPECT_EQ(day, month);
-
-  month = year;
-  EXPECT_EQ(month, year);
-
-  // Ensures unsafe conversions are not allowed.
-  EXPECT_FALSE((std::is_convertible<civil_second, civil_minute>::value));
-  EXPECT_FALSE((std::is_convertible<civil_second, civil_hour>::value));
-  EXPECT_FALSE((std::is_convertible<civil_second, civil_day>::value));
-  EXPECT_FALSE((std::is_convertible<civil_second, civil_month>::value));
-  EXPECT_FALSE((std::is_convertible<civil_second, civil_year>::value));
-
-  EXPECT_FALSE((std::is_convertible<civil_minute, civil_hour>::value));
-  EXPECT_FALSE((std::is_convertible<civil_minute, civil_day>::value));
-  EXPECT_FALSE((std::is_convertible<civil_minute, civil_month>::value));
-  EXPECT_FALSE((std::is_convertible<civil_minute, civil_year>::value));
-
-  EXPECT_FALSE((std::is_convertible<civil_hour, civil_day>::value));
-  EXPECT_FALSE((std::is_convertible<civil_hour, civil_month>::value));
-  EXPECT_FALSE((std::is_convertible<civil_hour, civil_year>::value));
-
-  EXPECT_FALSE((std::is_convertible<civil_day, civil_month>::value));
-  EXPECT_FALSE((std::is_convertible<civil_day, civil_year>::value));
-
-  EXPECT_FALSE((std::is_convertible<civil_month, civil_year>::value));
-}
-
-TEST(CivilTime, ExplicitCrossAlignment) {
-  //
-  // Assign from smaller units -> larger units
-  //
-
-  civil_second second(2015, 1, 2, 3, 4, 5);
-  EXPECT_EQ("2015-01-02T03:04:05", Format(second));
-
-  civil_minute minute(second);
-  EXPECT_EQ("2015-01-02T03:04", Format(minute));
-
-  civil_hour hour(minute);
-  EXPECT_EQ("2015-01-02T03", Format(hour));
-
-  civil_day day(hour);
-  EXPECT_EQ("2015-01-02", Format(day));
-
-  civil_month month(day);
-  EXPECT_EQ("2015-01", Format(month));
-
-  civil_year year(month);
-  EXPECT_EQ("2015", Format(year));
-
-  //
-  // Now assign from larger units -> smaller units
-  //
-
-  month = civil_month(year);
-  EXPECT_EQ("2015-01", Format(month));
-
-  day = civil_day(month);
-  EXPECT_EQ("2015-01-01", Format(day));
-
-  hour = civil_hour(day);
-  EXPECT_EQ("2015-01-01T00", Format(hour));
-
-  minute = civil_minute(hour);
-  EXPECT_EQ("2015-01-01T00:00", Format(minute));
-
-  second = civil_second(minute);
-  EXPECT_EQ("2015-01-01T00:00:00", Format(second));
-}
-
-// Metafunction to test whether difference is allowed between two types.
-template <typename T1, typename T2>
-struct HasDifference {
-  template <typename U1, typename U2>
-  static std::false_type test(...);
-  template <typename U1, typename U2>
-  static std::true_type test(decltype(std::declval<U1>() - std::declval<U2>()));
-  static constexpr bool value = decltype(test<T1, T2>(0))::value;
-};
-
-TEST(CivilTime, DisallowCrossAlignedDifference) {
-  // Difference is allowed between types with the same alignment.
-  static_assert(HasDifference<civil_second, civil_second>::value, "");
-  static_assert(HasDifference<civil_minute, civil_minute>::value, "");
-  static_assert(HasDifference<civil_hour, civil_hour>::value, "");
-  static_assert(HasDifference<civil_day, civil_day>::value, "");
-  static_assert(HasDifference<civil_month, civil_month>::value, "");
-  static_assert(HasDifference<civil_year, civil_year>::value, "");
-
-  // Difference is disallowed between types with different alignments.
-  static_assert(!HasDifference<civil_second, civil_minute>::value, "");
-  static_assert(!HasDifference<civil_second, civil_hour>::value, "");
-  static_assert(!HasDifference<civil_second, civil_day>::value, "");
-  static_assert(!HasDifference<civil_second, civil_month>::value, "");
-  static_assert(!HasDifference<civil_second, civil_year>::value, "");
-
-  static_assert(!HasDifference<civil_minute, civil_hour>::value, "");
-  static_assert(!HasDifference<civil_minute, civil_day>::value, "");
-  static_assert(!HasDifference<civil_minute, civil_month>::value, "");
-  static_assert(!HasDifference<civil_minute, civil_year>::value, "");
-
-  static_assert(!HasDifference<civil_hour, civil_day>::value, "");
-  static_assert(!HasDifference<civil_hour, civil_month>::value, "");
-  static_assert(!HasDifference<civil_hour, civil_year>::value, "");
-
-  static_assert(!HasDifference<civil_day, civil_month>::value, "");
-  static_assert(!HasDifference<civil_day, civil_year>::value, "");
-
-  static_assert(!HasDifference<civil_month, civil_year>::value, "");
-}
-
-TEST(CivilTime, ValueSemantics) {
-  const civil_hour a(2015, 1, 2, 3);
-  const civil_hour b = a;
-  const civil_hour c(b);
-  civil_hour d;
-  d = c;
-  EXPECT_EQ("2015-01-02T03", Format(d));
-}
-
-TEST(CivilTime, Relational) {
-  // Tests that the alignment unit is ignored in comparison.
-  const civil_year year(2014);
-  const civil_month month(year);
-  EXPECT_EQ(year, month);
-
-#define TEST_RELATIONAL(OLDER, YOUNGER) \
-  do {                                  \
-    EXPECT_FALSE(OLDER < OLDER);        \
-    EXPECT_FALSE(OLDER > OLDER);        \
-    EXPECT_TRUE(OLDER >= OLDER);        \
-    EXPECT_TRUE(OLDER <= OLDER);        \
-    EXPECT_FALSE(YOUNGER < YOUNGER);    \
-    EXPECT_FALSE(YOUNGER > YOUNGER);    \
-    EXPECT_TRUE(YOUNGER >= YOUNGER);    \
-    EXPECT_TRUE(YOUNGER <= YOUNGER);    \
-    EXPECT_EQ(OLDER, OLDER);            \
-    EXPECT_NE(OLDER, YOUNGER);          \
-    EXPECT_LT(OLDER, YOUNGER);          \
-    EXPECT_LE(OLDER, YOUNGER);          \
-    EXPECT_GT(YOUNGER, OLDER);          \
-    EXPECT_GE(YOUNGER, OLDER);          \
-  } while (0)
-
-  // Alignment is ignored in comparison (verified above), so kSecond is used
-  // to test comparison in all field positions.
-  TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0),
-                  civil_second(2015, 1, 1, 0, 0, 0));
-  TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0),
-                  civil_second(2014, 2, 1, 0, 0, 0));
-  TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0),
-                  civil_second(2014, 1, 2, 0, 0, 0));
-  TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0),
-                  civil_second(2014, 1, 1, 1, 0, 0));
-  TEST_RELATIONAL(civil_second(2014, 1, 1, 1, 0, 0),
-                  civil_second(2014, 1, 1, 1, 1, 0));
-  TEST_RELATIONAL(civil_second(2014, 1, 1, 1, 1, 0),
-                  civil_second(2014, 1, 1, 1, 1, 1));
-
-  // Tests the relational operators of two different civil-time types.
-  TEST_RELATIONAL(civil_day(2014, 1, 1), civil_minute(2014, 1, 1, 1, 1));
-  TEST_RELATIONAL(civil_day(2014, 1, 1), civil_month(2014, 2));
-
-#undef TEST_RELATIONAL
-}
-
-TEST(CivilTime, Arithmetic) {
-  civil_second second(2015, 1, 2, 3, 4, 5);
-  EXPECT_EQ("2015-01-02T03:04:06", Format(second += 1));
-  EXPECT_EQ("2015-01-02T03:04:07", Format(second + 1));
-  EXPECT_EQ("2015-01-02T03:04:08", Format(2 + second));
-  EXPECT_EQ("2015-01-02T03:04:05", Format(second - 1));
-  EXPECT_EQ("2015-01-02T03:04:05", Format(second -= 1));
-  EXPECT_EQ("2015-01-02T03:04:05", Format(second++));
-  EXPECT_EQ("2015-01-02T03:04:07", Format(++second));
-  EXPECT_EQ("2015-01-02T03:04:07", Format(second--));
-  EXPECT_EQ("2015-01-02T03:04:05", Format(--second));
-
-  civil_minute minute(2015, 1, 2, 3, 4);
-  EXPECT_EQ("2015-01-02T03:05", Format(minute += 1));
-  EXPECT_EQ("2015-01-02T03:06", Format(minute + 1));
-  EXPECT_EQ("2015-01-02T03:07", Format(2 + minute));
-  EXPECT_EQ("2015-01-02T03:04", Format(minute - 1));
-  EXPECT_EQ("2015-01-02T03:04", Format(minute -= 1));
-  EXPECT_EQ("2015-01-02T03:04", Format(minute++));
-  EXPECT_EQ("2015-01-02T03:06", Format(++minute));
-  EXPECT_EQ("2015-01-02T03:06", Format(minute--));
-  EXPECT_EQ("2015-01-02T03:04", Format(--minute));
-
-  civil_hour hour(2015, 1, 2, 3);
-  EXPECT_EQ("2015-01-02T04", Format(hour += 1));
-  EXPECT_EQ("2015-01-02T05", Format(hour + 1));
-  EXPECT_EQ("2015-01-02T06", Format(2 + hour));
-  EXPECT_EQ("2015-01-02T03", Format(hour - 1));
-  EXPECT_EQ("2015-01-02T03", Format(hour -= 1));
-  EXPECT_EQ("2015-01-02T03", Format(hour++));
-  EXPECT_EQ("2015-01-02T05", Format(++hour));
-  EXPECT_EQ("2015-01-02T05", Format(hour--));
-  EXPECT_EQ("2015-01-02T03", Format(--hour));
-
-  civil_day day(2015, 1, 2);
-  EXPECT_EQ("2015-01-03", Format(day += 1));
-  EXPECT_EQ("2015-01-04", Format(day + 1));
-  EXPECT_EQ("2015-01-05", Format(2 + day));
-  EXPECT_EQ("2015-01-02", Format(day - 1));
-  EXPECT_EQ("2015-01-02", Format(day -= 1));
-  EXPECT_EQ("2015-01-02", Format(day++));
-  EXPECT_EQ("2015-01-04", Format(++day));
-  EXPECT_EQ("2015-01-04", Format(day--));
-  EXPECT_EQ("2015-01-02", Format(--day));
-
-  civil_month month(2015, 1);
-  EXPECT_EQ("2015-02", Format(month += 1));
-  EXPECT_EQ("2015-03", Format(month + 1));
-  EXPECT_EQ("2015-04", Format(2 + month));
-  EXPECT_EQ("2015-01", Format(month - 1));
-  EXPECT_EQ("2015-01", Format(month -= 1));
-  EXPECT_EQ("2015-01", Format(month++));
-  EXPECT_EQ("2015-03", Format(++month));
-  EXPECT_EQ("2015-03", Format(month--));
-  EXPECT_EQ("2015-01", Format(--month));
-
-  civil_year year(2015);
-  EXPECT_EQ("2016", Format(year += 1));
-  EXPECT_EQ("2017", Format(year + 1));
-  EXPECT_EQ("2018", Format(2 + year));
-  EXPECT_EQ("2015", Format(year - 1));
-  EXPECT_EQ("2015", Format(year -= 1));
-  EXPECT_EQ("2015", Format(year++));
-  EXPECT_EQ("2017", Format(++year));
-  EXPECT_EQ("2017", Format(year--));
-  EXPECT_EQ("2015", Format(--year));
-}
-
-TEST(CivilTime, ArithmeticLimits) {
-  const int kIntMax = std::numeric_limits<int>::max();
-  const int kIntMin = std::numeric_limits<int>::min();
-
-  civil_second second(1970, 1, 1, 0, 0, 0);
-  second += kIntMax;
-  EXPECT_EQ("2038-01-19T03:14:07", Format(second));
-  second -= kIntMax;
-  EXPECT_EQ("1970-01-01T00:00:00", Format(second));
-  second += kIntMin;
-  EXPECT_EQ("1901-12-13T20:45:52", Format(second));
-  second -= kIntMin;
-  EXPECT_EQ("1970-01-01T00:00:00", Format(second));
-
-  civil_minute minute(1970, 1, 1, 0, 0);
-  minute += kIntMax;
-  EXPECT_EQ("6053-01-23T02:07", Format(minute));
-  minute -= kIntMax;
-  EXPECT_EQ("1970-01-01T00:00", Format(minute));
-  minute += kIntMin;
-  EXPECT_EQ("-2114-12-08T21:52", Format(minute));
-  minute -= kIntMin;
-  EXPECT_EQ("1970-01-01T00:00", Format(minute));
-
-  civil_hour hour(1970, 1, 1, 0);
-  hour += kIntMax;
-  EXPECT_EQ("246953-10-09T07", Format(hour));
-  hour -= kIntMax;
-  EXPECT_EQ("1970-01-01T00", Format(hour));
-  hour += kIntMin;
-  EXPECT_EQ("-243014-03-24T16", Format(hour));
-  hour -= kIntMin;
-  EXPECT_EQ("1970-01-01T00", Format(hour));
-
-  civil_day day(1970, 1, 1);
-  day += kIntMax;
-  EXPECT_EQ("5881580-07-11", Format(day));
-  day -= kIntMax;
-  EXPECT_EQ("1970-01-01", Format(day));
-  day += kIntMin;
-  EXPECT_EQ("-5877641-06-23", Format(day));
-  day -= kIntMin;
-  EXPECT_EQ("1970-01-01", Format(day));
-
-  civil_month month(1970, 1);
-  month += kIntMax;
-  EXPECT_EQ("178958940-08", Format(month));
-  month -= kIntMax;
-  EXPECT_EQ("1970-01", Format(month));
-  month += kIntMin;
-  EXPECT_EQ("-178955001-05", Format(month));
-  month -= kIntMin;
-  EXPECT_EQ("1970-01", Format(month));
-
-  civil_year year(0);
-  year += kIntMax;
-  EXPECT_EQ("2147483647", Format(year));
-  year -= kIntMax;
-  EXPECT_EQ("0", Format(year));
-  year += kIntMin;
-  EXPECT_EQ("-2147483648", Format(year));
-  year -= kIntMin;
-  EXPECT_EQ("0", Format(year));
-}
-
-TEST(CivilTime, ArithmeticDifference) {
-  civil_second second(2015, 1, 2, 3, 4, 5);
-  EXPECT_EQ(0, second - second);
-  EXPECT_EQ(10, (second + 10) - second);
-  EXPECT_EQ(-10, (second - 10) - second);
-
-  civil_minute minute(2015, 1, 2, 3, 4);
-  EXPECT_EQ(0, minute - minute);
-  EXPECT_EQ(10, (minute + 10) - minute);
-  EXPECT_EQ(-10, (minute - 10) - minute);
-
-  civil_hour hour(2015, 1, 2, 3);
-  EXPECT_EQ(0, hour - hour);
-  EXPECT_EQ(10, (hour + 10) - hour);
-  EXPECT_EQ(-10, (hour - 10) - hour);
-
-  civil_day day(2015, 1, 2);
-  EXPECT_EQ(0, day - day);
-  EXPECT_EQ(10, (day + 10) - day);
-  EXPECT_EQ(-10, (day - 10) - day);
-
-  civil_month month(2015, 1);
-  EXPECT_EQ(0, month - month);
-  EXPECT_EQ(10, (month + 10) - month);
-  EXPECT_EQ(-10, (month - 10) - month);
-
-  civil_year year(2015);
-  EXPECT_EQ(0, year - year);
-  EXPECT_EQ(10, (year + 10) - year);
-  EXPECT_EQ(-10, (year - 10) - year);
-}
-
-TEST(CivilTime, DifferenceLimits) {
-  const int kIntMax = std::numeric_limits<int>::max();
-  const int kIntMin = std::numeric_limits<int>::min();
-
-  // Check day arithmetic at the end of the year range.
-  const civil_day max_day(kIntMax, 12, 31);
-  EXPECT_EQ(1, max_day - (max_day - 1));
-  EXPECT_EQ(-1, (max_day - 1) - max_day);
-
-  // Check day arithmetic at the end of the year range.
-  const civil_day min_day(kIntMin, 1, 1);
-  EXPECT_EQ(1, (min_day + 1) - min_day);
-  EXPECT_EQ(-1, min_day - (min_day + 1));
-
-  // Check the limits of the return value.
-  const civil_day d1(1970, 1, 1);
-  const civil_day d2(5881580, 7, 11);
-  EXPECT_EQ(kIntMax, d2 - d1);
-  EXPECT_EQ(kIntMin, d1 - (d2 + 1));
-}
-
-TEST(CivilTime, Properties) {
-  civil_second ss(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, ss.year());
-  EXPECT_EQ(2, ss.month());
-  EXPECT_EQ(3, ss.day());
-  EXPECT_EQ(4, ss.hour());
-  EXPECT_EQ(5, ss.minute());
-  EXPECT_EQ(6, ss.second());
-  EXPECT_EQ(weekday::tuesday, get_weekday(ss));
-  EXPECT_EQ(34, get_yearday(ss));
-
-  civil_minute mm(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, mm.year());
-  EXPECT_EQ(2, mm.month());
-  EXPECT_EQ(3, mm.day());
-  EXPECT_EQ(4, mm.hour());
-  EXPECT_EQ(5, mm.minute());
-  EXPECT_EQ(0, mm.second());
-  EXPECT_EQ(weekday::tuesday, get_weekday(mm));
-  EXPECT_EQ(34, get_yearday(mm));
-
-  civil_hour hh(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, hh.year());
-  EXPECT_EQ(2, hh.month());
-  EXPECT_EQ(3, hh.day());
-  EXPECT_EQ(4, hh.hour());
-  EXPECT_EQ(0, hh.minute());
-  EXPECT_EQ(0, hh.second());
-  EXPECT_EQ(weekday::tuesday, get_weekday(hh));
-  EXPECT_EQ(34, get_yearday(hh));
-
-  civil_day d(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, d.year());
-  EXPECT_EQ(2, d.month());
-  EXPECT_EQ(3, d.day());
-  EXPECT_EQ(0, d.hour());
-  EXPECT_EQ(0, d.minute());
-  EXPECT_EQ(0, d.second());
-  EXPECT_EQ(weekday::tuesday, get_weekday(d));
-  EXPECT_EQ(34, get_yearday(d));
-
-  civil_month m(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, m.year());
-  EXPECT_EQ(2, m.month());
-  EXPECT_EQ(1, m.day());
-  EXPECT_EQ(0, m.hour());
-  EXPECT_EQ(0, m.minute());
-  EXPECT_EQ(0, m.second());
-  EXPECT_EQ(weekday::sunday, get_weekday(m));
-  EXPECT_EQ(32, get_yearday(m));
-
-  civil_year y(2015, 2, 3, 4, 5, 6);
-  EXPECT_EQ(2015, y.year());
-  EXPECT_EQ(1, y.month());
-  EXPECT_EQ(1, y.day());
-  EXPECT_EQ(0, y.hour());
-  EXPECT_EQ(0, y.minute());
-  EXPECT_EQ(0, y.second());
-  EXPECT_EQ(weekday::thursday, get_weekday(y));
-  EXPECT_EQ(1, get_yearday(y));
-}
-
-TEST(CivilTime, OutputStream) {
-  // Tests formatting of civil_year, which does not pad.
-  EXPECT_EQ("2016", Format(civil_year(2016)));
-  EXPECT_EQ("123", Format(civil_year(123)));
-  EXPECT_EQ("0", Format(civil_year(0)));
-  EXPECT_EQ("-1", Format(civil_year(-1)));
-
-  // Tests formatting of sub-year types, which pad to 2 digits
-  EXPECT_EQ("2016-02", Format(civil_month(2016, 2)));
-  EXPECT_EQ("2016-02-03", Format(civil_day(2016, 2, 3)));
-  EXPECT_EQ("2016-02-03T04", Format(civil_hour(2016, 2, 3, 4)));
-  EXPECT_EQ("2016-02-03T04:05", Format(civil_minute(2016, 2, 3, 4, 5)));
-  EXPECT_EQ("2016-02-03T04:05:06", Format(civil_second(2016, 2, 3, 4, 5, 6)));
-
-  // Tests formatting of weekday.
-  EXPECT_EQ("Monday", Format(weekday::monday));
-  EXPECT_EQ("Tuesday", Format(weekday::tuesday));
-  EXPECT_EQ("Wednesday", Format(weekday::wednesday));
-  EXPECT_EQ("Thursday", Format(weekday::thursday));
-  EXPECT_EQ("Friday", Format(weekday::friday));
-  EXPECT_EQ("Saturday", Format(weekday::saturday));
-  EXPECT_EQ("Sunday", Format(weekday::sunday));
-}
-
-TEST(CivilTime, OutputStreamLeftFillWidth) {
-  civil_second cs(2016, 2, 3, 4, 5, 6);
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << civil_year(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016.................X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << civil_month(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02..............X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << civil_day(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03...........X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << civil_hour(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03T04........X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << civil_minute(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03T04:05.....X..", ss.str());
-  }
-  {
-    std::stringstream ss;
-    ss << std::left << std::setfill('.');
-    ss << std::setw(3) << 'X';
-    ss << std::setw(21) << civil_second(cs);
-    ss << std::setw(3) << 'X';
-    EXPECT_EQ("X..2016-02-03T04:05:06..X..", ss.str());
-  }
-}
-
-TEST(CivilTime, NextPrevWeekday) {
-  // Jan 1, 1970 was a Thursday.
-  const civil_day thursday(1970, 1, 1);
-  EXPECT_EQ(weekday::thursday, get_weekday(thursday));
-
-  // Thursday -> Thursday
-  civil_day d = next_weekday(thursday, weekday::thursday);
-  EXPECT_EQ(7, d - thursday) << Format(d);
-  EXPECT_EQ(d - 14, prev_weekday(thursday, weekday::thursday));
-
-  // Thursday -> Friday
-  d = next_weekday(thursday, weekday::friday);
-  EXPECT_EQ(1, d - thursday) << Format(d);
-  EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::friday));
-
-  // Thursday -> Saturday
-  d = next_weekday(thursday, weekday::saturday);
-  EXPECT_EQ(2, d - thursday) << Format(d);
-  EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::saturday));
-
-  // Thursday -> Sunday
-  d = next_weekday(thursday, weekday::sunday);
-  EXPECT_EQ(3, d - thursday) << Format(d);
-  EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::sunday));
-
-  // Thursday -> Monday
-  d = next_weekday(thursday, weekday::monday);
-  EXPECT_EQ(4, d - thursday) << Format(d);
-  EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::monday));
-
-  // Thursday -> Tuesday
-  d = next_weekday(thursday, weekday::tuesday);
-  EXPECT_EQ(5, d - thursday) << Format(d);
-  EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::tuesday));
-
-  // Thursday -> Wednesday
-  d = next_weekday(thursday, weekday::wednesday);
-  EXPECT_EQ(6, d - thursday) << Format(d);
-  EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::wednesday));
-}
-
-TEST(CivilTime, NormalizeWithHugeYear) {
-  civil_month c(9223372036854775807, 1);
-  EXPECT_EQ("9223372036854775807-01", Format(c));
-  c = c - 1;  // Causes normalization
-  EXPECT_EQ("9223372036854775806-12", Format(c));
-
-  c = civil_month(-9223372036854775807 - 1, 1);
-  EXPECT_EQ("-9223372036854775808-01", Format(c));
-  c = c + 12;  // Causes normalization
-  EXPECT_EQ("-9223372036854775807-01", Format(c));
-}
-
-TEST(CivilTime, LeapYears) {
-  // Test data for leap years.
-  const struct {
-    int year;
-    int days;
-    struct {
-      int month;
-      int day;
-    } leap_day;  // The date of the day after Feb 28.
-  } kLeapYearTable[]{
-      {1900, 365, {3, 1}},  {1999, 365, {3, 1}},
-      {2000, 366, {2, 29}},  // leap year
-      {2001, 365, {3, 1}},  {2002, 365, {3, 1}},
-      {2003, 365, {3, 1}},  {2004, 366, {2, 29}},  // leap year
-      {2005, 365, {3, 1}},  {2006, 365, {3, 1}},
-      {2007, 365, {3, 1}},  {2008, 366, {2, 29}},  // leap year
-      {2009, 365, {3, 1}},  {2100, 365, {3, 1}},
-  };
-
-  for (const auto& e : kLeapYearTable) {
-    // Tests incrementing through the leap day.
-    const civil_day feb28(e.year, 2, 28);
-    const civil_day next_day = feb28 + 1;
-    EXPECT_EQ(e.leap_day.month, next_day.month());
-    EXPECT_EQ(e.leap_day.day, next_day.day());
-
-    // Tests difference in days of leap years.
-    const civil_year year(feb28);
-    const civil_year next_year = year + 1;
-    EXPECT_EQ(e.days, civil_day(next_year) - civil_day(year));
-  }
-}
-
-TEST(CivilTime, FirstThursdayInMonth) {
-  const civil_day nov1(2014, 11, 1);
-  const civil_day thursday = next_weekday(nov1 - 1, weekday::thursday);
-  EXPECT_EQ("2014-11-06", Format(thursday));
-
-  // Bonus: Date of Thanksgiving in the United States
-  // Rule: Fourth Thursday of November
-  const civil_day thanksgiving = thursday + 7 * 3;
-  EXPECT_EQ("2014-11-27", Format(thanksgiving));
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_fixed.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_fixed.cc
deleted file mode 100644
index 303c024..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_fixed.cc
+++ /dev/null
@@ -1,140 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "time_zone_fixed.h"
-
-#include <algorithm>
-#include <cassert>
-#include <chrono>
-#include <cstring>
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-// The prefix used for the internal names of fixed-offset zones.
-const char kFixedZonePrefix[] = "Fixed/UTC";
-
-const char kDigits[] = "0123456789";
-
-char* Format02d(char* p, int v) {
-  *p++ = kDigits[(v / 10) % 10];
-  *p++ = kDigits[v % 10];
-  return p;
-}
-
-int Parse02d(const char* p) {
-  if (const char* ap = std::strchr(kDigits, *p)) {
-    int v = static_cast<int>(ap - kDigits);
-    if (const char* bp = std::strchr(kDigits, *++p)) {
-      return (v * 10) + static_cast<int>(bp - kDigits);
-    }
-  }
-  return -1;
-}
-
-}  // namespace
-
-bool FixedOffsetFromName(const std::string& name, seconds* offset) {
-  if (name.compare(0, std::string::npos, "UTC", 3) == 0) {
-    *offset = seconds::zero();
-    return true;
-  }
-
-  const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1;
-  const char* const ep = kFixedZonePrefix + prefix_len;
-  if (name.size() != prefix_len + 9)  // <prefix>+99:99:99
-    return false;
-  if (!std::equal(kFixedZonePrefix, ep, name.begin())) return false;
-  const char* np = name.data() + prefix_len;
-  if (np[0] != '+' && np[0] != '-') return false;
-  if (np[3] != ':' || np[6] != ':')  // see note below about large offsets
-    return false;
-
-  int hours = Parse02d(np + 1);
-  if (hours == -1) return false;
-  int mins = Parse02d(np + 4);
-  if (mins == -1) return false;
-  int secs = Parse02d(np + 7);
-  if (secs == -1) return false;
-
-  secs += ((hours * 60) + mins) * 60;
-  if (secs > 24 * 60 * 60) return false;  // outside supported offset range
-  *offset = seconds(secs * (np[0] == '-' ? -1 : 1));  // "-" means west
-  return true;
-}
-
-std::string FixedOffsetToName(const seconds& offset) {
-  if (offset == seconds::zero()) return "UTC";
-  if (offset < std::chrono::hours(-24) || offset > std::chrono::hours(24)) {
-    // We don't support fixed-offset zones more than 24 hours
-    // away from UTC to avoid complications in rendering such
-    // offsets and to (somewhat) limit the total number of zones.
-    return "UTC";
-  }
-  int offset_seconds = static_cast<int>(offset.count());
-  const char sign = (offset_seconds < 0 ? '-' : '+');
-  int offset_minutes = offset_seconds / 60;
-  offset_seconds %= 60;
-  if (sign == '-') {
-    if (offset_seconds > 0) {
-      offset_seconds -= 60;
-      offset_minutes += 1;
-    }
-    offset_seconds = -offset_seconds;
-    offset_minutes = -offset_minutes;
-  }
-  int offset_hours = offset_minutes / 60;
-  offset_minutes %= 60;
-  const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1;
-  char buf[prefix_len + sizeof("-24:00:00")];
-  char* ep = std::copy(kFixedZonePrefix, kFixedZonePrefix + prefix_len, buf);
-  *ep++ = sign;
-  ep = Format02d(ep, offset_hours);
-  *ep++ = ':';
-  ep = Format02d(ep, offset_minutes);
-  *ep++ = ':';
-  ep = Format02d(ep, offset_seconds);
-  *ep++ = '\0';
-  assert(ep == buf + sizeof(buf));
-  return buf;
-}
-
-std::string FixedOffsetToAbbr(const seconds& offset) {
-  std::string abbr = FixedOffsetToName(offset);
-  const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1;
-  if (abbr.size() == prefix_len + 9) {         // <prefix>+99:99:99
-    abbr.erase(0, prefix_len);                 // +99:99:99
-    abbr.erase(6, 1);                          // +99:9999
-    abbr.erase(3, 1);                          // +999999
-    if (abbr[5] == '0' && abbr[6] == '0') {    // +999900
-      abbr.erase(5, 2);                        // +9999
-      if (abbr[3] == '0' && abbr[4] == '0') {  // +9900
-        abbr.erase(3, 2);                      // +99
-      }
-    }
-  }
-  return abbr;
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_fixed.h b/third_party/abseil/absl/time/internal/cctz/src/time_zone_fixed.h
deleted file mode 100644
index e74a0bb..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_fixed.h
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_FIXED_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_FIXED_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// Helper functions for dealing with the names and abbreviations
-// of time zones that are a fixed offset (seconds east) from UTC.
-// FixedOffsetFromName() extracts the offset from a valid fixed-offset
-// name, while FixedOffsetToName() and FixedOffsetToAbbr() generate
-// the canonical zone name and abbreviation respectively for the given
-// offset.
-//
-// A fixed-offset name looks like "Fixed/UTC<+-><hours>:<mins>:<secs>".
-// Its abbreviation is of the form "UTC(<+->H?H(MM(SS)?)?)?" where the
-// optional pieces are omitted when their values are zero.  (Note that
-// the sign is the opposite of that used in a POSIX TZ specification.)
-//
-// Note: FixedOffsetFromName() fails on syntax errors or when the parsed
-// offset exceeds 24 hours.  FixedOffsetToName() and FixedOffsetToAbbr()
-// both produce "UTC" when the argument offset exceeds 24 hours.
-bool FixedOffsetFromName(const std::string& name, seconds* offset);
-std::string FixedOffsetToName(const seconds& offset);
-std::string FixedOffsetToAbbr(const seconds& offset);
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_FIXED_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_format.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_format.cc
deleted file mode 100644
index d8cb047..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_format.cc
+++ /dev/null
@@ -1,1029 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#if !defined(HAS_STRPTIME)
-#if !defined(_MSC_VER) && !defined(__MINGW32__)
-#define HAS_STRPTIME 1  // assume everyone has strptime() except windows
-#endif
-#endif
-
-#if defined(HAS_STRPTIME) && HAS_STRPTIME
-#if !defined(_XOPEN_SOURCE)
-#define _XOPEN_SOURCE  // Definedness suffices for strptime.
-#endif
-#endif
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-// Include time.h directly since, by C++ standards, ctime doesn't have to
-// declare strptime.
-#include <time.h>
-
-#include <cctype>
-#include <chrono>
-#include <cstddef>
-#include <cstdint>
-#include <cstring>
-#include <ctime>
-#include <limits>
-#include <string>
-#include <vector>
-#if !HAS_STRPTIME
-#include <iomanip>
-#include <sstream>
-#endif
-
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "time_zone_if.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-namespace detail {
-
-namespace {
-
-#if !HAS_STRPTIME
-// Build a strptime() using C++11's std::get_time().
-char* strptime(const char* s, const char* fmt, std::tm* tm) {
-  std::istringstream input(s);
-  input >> std::get_time(tm, fmt);
-  if (input.fail()) return nullptr;
-  return const_cast<char*>(s) +
-         (input.eof() ? strlen(s) : static_cast<std::size_t>(input.tellg()));
-}
-#endif
-
-// Convert a cctz::weekday to a tm_wday value (0-6, Sunday = 0).
-int ToTmWday(weekday wd) {
-  switch (wd) {
-    case weekday::sunday:
-      return 0;
-    case weekday::monday:
-      return 1;
-    case weekday::tuesday:
-      return 2;
-    case weekday::wednesday:
-      return 3;
-    case weekday::thursday:
-      return 4;
-    case weekday::friday:
-      return 5;
-    case weekday::saturday:
-      return 6;
-  }
-  return 0; /*NOTREACHED*/
-}
-
-// Convert a tm_wday value (0-6, Sunday = 0) to a cctz::weekday.
-weekday FromTmWday(int tm_wday) {
-  switch (tm_wday) {
-    case 0:
-      return weekday::sunday;
-    case 1:
-      return weekday::monday;
-    case 2:
-      return weekday::tuesday;
-    case 3:
-      return weekday::wednesday;
-    case 4:
-      return weekday::thursday;
-    case 5:
-      return weekday::friday;
-    case 6:
-      return weekday::saturday;
-  }
-  return weekday::sunday; /*NOTREACHED*/
-}
-
-std::tm ToTM(const time_zone::absolute_lookup& al) {
-  std::tm tm{};
-  tm.tm_sec = al.cs.second();
-  tm.tm_min = al.cs.minute();
-  tm.tm_hour = al.cs.hour();
-  tm.tm_mday = al.cs.day();
-  tm.tm_mon = al.cs.month() - 1;
-
-  // Saturate tm.tm_year is cases of over/underflow.
-  if (al.cs.year() < std::numeric_limits<int>::min() + 1900) {
-    tm.tm_year = std::numeric_limits<int>::min();
-  } else if (al.cs.year() - 1900 > std::numeric_limits<int>::max()) {
-    tm.tm_year = std::numeric_limits<int>::max();
-  } else {
-    tm.tm_year = static_cast<int>(al.cs.year() - 1900);
-  }
-
-  tm.tm_wday = ToTmWday(get_weekday(al.cs));
-  tm.tm_yday = get_yearday(al.cs) - 1;
-  tm.tm_isdst = al.is_dst ? 1 : 0;
-  return tm;
-}
-
-// Returns the week of the year [0:53] given a civil day and the day on
-// which weeks are defined to start.
-int ToWeek(const civil_day& cd, weekday week_start) {
-  const civil_day d(cd.year() % 400, cd.month(), cd.day());
-  return static_cast<int>((d - prev_weekday(civil_year(d), week_start)) / 7);
-}
-
-const char kDigits[] = "0123456789";
-
-// Formats a 64-bit integer in the given field width.  Note that it is up
-// to the caller of Format64() [and Format02d()/FormatOffset()] to ensure
-// that there is sufficient space before ep to hold the conversion.
-char* Format64(char* ep, int width, std::int_fast64_t v) {
-  bool neg = false;
-  if (v < 0) {
-    --width;
-    neg = true;
-    if (v == std::numeric_limits<std::int_fast64_t>::min()) {
-      // Avoid negating minimum value.
-      std::int_fast64_t last_digit = -(v % 10);
-      v /= 10;
-      if (last_digit < 0) {
-        ++v;
-        last_digit += 10;
-      }
-      --width;
-      *--ep = kDigits[last_digit];
-    }
-    v = -v;
-  }
-  do {
-    --width;
-    *--ep = kDigits[v % 10];
-  } while (v /= 10);
-  while (--width >= 0) *--ep = '0';  // zero pad
-  if (neg) *--ep = '-';
-  return ep;
-}
-
-// Formats [0 .. 99] as %02d.
-char* Format02d(char* ep, int v) {
-  *--ep = kDigits[v % 10];
-  *--ep = kDigits[(v / 10) % 10];
-  return ep;
-}
-
-// Formats a UTC offset, like +00:00.
-char* FormatOffset(char* ep, int offset, const char* mode) {
-  // TODO: Follow the RFC3339 "Unknown Local Offset Convention" and
-  // generate a "negative zero" when we're formatting a zero offset
-  // as the result of a failed load_time_zone().
-  char sign = '+';
-  if (offset < 0) {
-    offset = -offset;  // bounded by 24h so no overflow
-    sign = '-';
-  }
-  const int seconds = offset % 60;
-  const int minutes = (offset /= 60) % 60;
-  const int hours = offset /= 60;
-  const char sep = mode[0];
-  const bool ext = (sep != '\0' && mode[1] == '*');
-  const bool ccc = (ext && mode[2] == ':');
-  if (ext && (!ccc || seconds != 0)) {
-    ep = Format02d(ep, seconds);
-    *--ep = sep;
-  } else {
-    // If we're not rendering seconds, sub-minute negative offsets
-    // should get a positive sign (e.g., offset=-10s => "+00:00").
-    if (hours == 0 && minutes == 0) sign = '+';
-  }
-  if (!ccc || minutes != 0 || seconds != 0) {
-    ep = Format02d(ep, minutes);
-    if (sep != '\0') *--ep = sep;
-  }
-  ep = Format02d(ep, hours);
-  *--ep = sign;
-  return ep;
-}
-
-// Formats a std::tm using strftime(3).
-void FormatTM(std::string* out, const std::string& fmt, const std::tm& tm) {
-  // strftime(3) returns the number of characters placed in the output
-  // array (which may be 0 characters).  It also returns 0 to indicate
-  // an error, like the array wasn't large enough.  To accommodate this,
-  // the following code grows the buffer size from 2x the format string
-  // length up to 32x.
-  for (std::size_t i = 2; i != 32; i *= 2) {
-    std::size_t buf_size = fmt.size() * i;
-    std::vector<char> buf(buf_size);
-    if (std::size_t len = strftime(&buf[0], buf_size, fmt.c_str(), &tm)) {
-      out->append(&buf[0], len);
-      return;
-    }
-  }
-}
-
-// Used for %E#S/%E#f specifiers and for data values in parse().
-template <typename T>
-const char* ParseInt(const char* dp, int width, T min, T max, T* vp) {
-  if (dp != nullptr) {
-    const T kmin = std::numeric_limits<T>::min();
-    bool erange = false;
-    bool neg = false;
-    T value = 0;
-    if (*dp == '-') {
-      neg = true;
-      if (width <= 0 || --width != 0) {
-        ++dp;
-      } else {
-        dp = nullptr;  // width was 1
-      }
-    }
-    if (const char* const bp = dp) {
-      while (const char* cp = strchr(kDigits, *dp)) {
-        int d = static_cast<int>(cp - kDigits);
-        if (d >= 10) break;
-        if (value < kmin / 10) {
-          erange = true;
-          break;
-        }
-        value *= 10;
-        if (value < kmin + d) {
-          erange = true;
-          break;
-        }
-        value -= d;
-        dp += 1;
-        if (width > 0 && --width == 0) break;
-      }
-      if (dp != bp && !erange && (neg || value != kmin)) {
-        if (!neg || value != 0) {
-          if (!neg) value = -value;  // make positive
-          if (min <= value && value <= max) {
-            *vp = value;
-          } else {
-            dp = nullptr;
-          }
-        } else {
-          dp = nullptr;
-        }
-      } else {
-        dp = nullptr;
-      }
-    }
-  }
-  return dp;
-}
-
-// The number of base-10 digits that can be represented by a signed 64-bit
-// integer.  That is, 10^kDigits10_64 <= 2^63 - 1 < 10^(kDigits10_64 + 1).
-const int kDigits10_64 = 18;
-
-// 10^n for everything that can be represented by a signed 64-bit integer.
-const std::int_fast64_t kExp10[kDigits10_64 + 1] = {
-    1,
-    10,
-    100,
-    1000,
-    10000,
-    100000,
-    1000000,
-    10000000,
-    100000000,
-    1000000000,
-    10000000000,
-    100000000000,
-    1000000000000,
-    10000000000000,
-    100000000000000,
-    1000000000000000,
-    10000000000000000,
-    100000000000000000,
-    1000000000000000000,
-};
-
-}  // namespace
-
-// Uses strftime(3) to format the given Time.  The following extended format
-// specifiers are also supported:
-//
-//   - %Ez  - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm)
-//   - %E*z - Full-resolution numeric UTC offset (+hh:mm:ss or -hh:mm:ss)
-//   - %E#S - Seconds with # digits of fractional precision
-//   - %E*S - Seconds with full fractional precision (a literal '*')
-//   - %E4Y - Four-character years (-999 ... -001, 0000, 0001 ... 9999)
-//   - %ET  - The RFC3339 "date-time" separator "T"
-//
-// The standard specifiers from RFC3339_* (%Y, %m, %d, %H, %M, and %S) are
-// handled internally for performance reasons.  strftime(3) is slow due to
-// a POSIX requirement to respect changes to ${TZ}.
-//
-// The TZ/GNU %s extension is handled internally because strftime() has
-// to use mktime() to generate it, and that assumes the local time zone.
-//
-// We also handle the %z and %Z specifiers to accommodate platforms that do
-// not support the tm_gmtoff and tm_zone extensions to std::tm.
-//
-// Requires that zero() <= fs < seconds(1).
-std::string format(const std::string& format, const time_point<seconds>& tp,
-                   const detail::femtoseconds& fs, const time_zone& tz) {
-  std::string result;
-  result.reserve(format.size());  // A reasonable guess for the result size.
-  const time_zone::absolute_lookup al = tz.lookup(tp);
-  const std::tm tm = ToTM(al);
-
-  // Scratch buffer for internal conversions.
-  char buf[3 + kDigits10_64];  // enough for longest conversion
-  char* const ep = buf + sizeof(buf);
-  char* bp;  // works back from ep
-
-  // Maintain three, disjoint subsequences that span format.
-  //   [format.begin() ... pending) : already formatted into result
-  //   [pending ... cur) : formatting pending, but no special cases
-  //   [cur ... format.end()) : unexamined
-  // Initially, everything is in the unexamined part.
-  const char* pending = format.c_str();  // NUL terminated
-  const char* cur = pending;
-  const char* end = pending + format.length();
-
-  while (cur != end) {  // while something is unexamined
-    // Moves cur to the next percent sign.
-    const char* start = cur;
-    while (cur != end && *cur != '%') ++cur;
-
-    // If the new pending text is all ordinary, copy it out.
-    if (cur != start && pending == start) {
-      result.append(pending, static_cast<std::size_t>(cur - pending));
-      pending = start = cur;
-    }
-
-    // Span the sequential percent signs.
-    const char* percent = cur;
-    while (cur != end && *cur == '%') ++cur;
-
-    // If the new pending text is all percents, copy out one
-    // percent for every matched pair, then skip those pairs.
-    if (cur != start && pending == start) {
-      std::size_t escaped = static_cast<std::size_t>(cur - pending) / 2;
-      result.append(pending, escaped);
-      pending += escaped * 2;
-      // Also copy out a single trailing percent.
-      if (pending != cur && cur == end) {
-        result.push_back(*pending++);
-      }
-    }
-
-    // Loop unless we have an unescaped percent.
-    if (cur == end || (cur - percent) % 2 == 0) continue;
-
-    // Simple specifiers that we handle ourselves.
-    if (strchr("YmdeUuWwHMSzZs%", *cur)) {
-      if (cur - 1 != pending) {
-        FormatTM(&result, std::string(pending, cur - 1), tm);
-      }
-      switch (*cur) {
-        case 'Y':
-          // This avoids the tm.tm_year overflow problem for %Y, however
-          // tm.tm_year will still be used by other specifiers like %D.
-          bp = Format64(ep, 0, al.cs.year());
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'm':
-          bp = Format02d(ep, al.cs.month());
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'd':
-        case 'e':
-          bp = Format02d(ep, al.cs.day());
-          if (*cur == 'e' && *bp == '0') *bp = ' ';  // for Windows
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'U':
-          bp = Format02d(ep, ToWeek(civil_day(al.cs), weekday::sunday));
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'u':
-          bp = Format64(ep, 0, tm.tm_wday ? tm.tm_wday : 7);
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'W':
-          bp = Format02d(ep, ToWeek(civil_day(al.cs), weekday::monday));
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'w':
-          bp = Format64(ep, 0, tm.tm_wday);
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'H':
-          bp = Format02d(ep, al.cs.hour());
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'M':
-          bp = Format02d(ep, al.cs.minute());
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'S':
-          bp = Format02d(ep, al.cs.second());
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'z':
-          bp = FormatOffset(ep, al.offset, "");
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case 'Z':
-          result.append(al.abbr);
-          break;
-        case 's':
-          bp = Format64(ep, 0, ToUnixSeconds(tp));
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          break;
-        case '%':
-          result.push_back('%');
-          break;
-      }
-      pending = ++cur;
-      continue;
-    }
-
-    // More complex specifiers that we handle ourselves.
-    if (*cur == ':' && cur + 1 != end) {
-      if (*(cur + 1) == 'z') {
-        // Formats %:z.
-        if (cur - 1 != pending) {
-          FormatTM(&result, std::string(pending, cur - 1), tm);
-        }
-        bp = FormatOffset(ep, al.offset, ":");
-        result.append(bp, static_cast<std::size_t>(ep - bp));
-        pending = cur += 2;
-        continue;
-      }
-      if (*(cur + 1) == ':' && cur + 2 != end) {
-        if (*(cur + 2) == 'z') {
-          // Formats %::z.
-          if (cur - 1 != pending) {
-            FormatTM(&result, std::string(pending, cur - 1), tm);
-          }
-          bp = FormatOffset(ep, al.offset, ":*");
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          pending = cur += 3;
-          continue;
-        }
-        if (*(cur + 2) == ':' && cur + 3 != end) {
-          if (*(cur + 3) == 'z') {
-            // Formats %:::z.
-            if (cur - 1 != pending) {
-              FormatTM(&result, std::string(pending, cur - 1), tm);
-            }
-            bp = FormatOffset(ep, al.offset, ":*:");
-            result.append(bp, static_cast<std::size_t>(ep - bp));
-            pending = cur += 4;
-            continue;
-          }
-        }
-      }
-    }
-
-    // Loop if there is no E modifier.
-    if (*cur != 'E' || ++cur == end) continue;
-
-    // Format our extensions.
-    if (*cur == 'T') {
-      // Formats %ET.
-      if (cur - 2 != pending) {
-        FormatTM(&result, std::string(pending, cur - 2), tm);
-      }
-      result.append("T");
-      pending = ++cur;
-    } else if (*cur == 'z') {
-      // Formats %Ez.
-      if (cur - 2 != pending) {
-        FormatTM(&result, std::string(pending, cur - 2), tm);
-      }
-      bp = FormatOffset(ep, al.offset, ":");
-      result.append(bp, static_cast<std::size_t>(ep - bp));
-      pending = ++cur;
-    } else if (*cur == '*' && cur + 1 != end && *(cur + 1) == 'z') {
-      // Formats %E*z.
-      if (cur - 2 != pending) {
-        FormatTM(&result, std::string(pending, cur - 2), tm);
-      }
-      bp = FormatOffset(ep, al.offset, ":*");
-      result.append(bp, static_cast<std::size_t>(ep - bp));
-      pending = cur += 2;
-    } else if (*cur == '*' && cur + 1 != end &&
-               (*(cur + 1) == 'S' || *(cur + 1) == 'f')) {
-      // Formats %E*S or %E*F.
-      if (cur - 2 != pending) {
-        FormatTM(&result, std::string(pending, cur - 2), tm);
-      }
-      char* cp = ep;
-      bp = Format64(cp, 15, fs.count());
-      while (cp != bp && cp[-1] == '0') --cp;
-      switch (*(cur + 1)) {
-        case 'S':
-          if (cp != bp) *--bp = '.';
-          bp = Format02d(bp, al.cs.second());
-          break;
-        case 'f':
-          if (cp == bp) *--bp = '0';
-          break;
-      }
-      result.append(bp, static_cast<std::size_t>(cp - bp));
-      pending = cur += 2;
-    } else if (*cur == '4' && cur + 1 != end && *(cur + 1) == 'Y') {
-      // Formats %E4Y.
-      if (cur - 2 != pending) {
-        FormatTM(&result, std::string(pending, cur - 2), tm);
-      }
-      bp = Format64(ep, 4, al.cs.year());
-      result.append(bp, static_cast<std::size_t>(ep - bp));
-      pending = cur += 2;
-    } else if (std::isdigit(*cur)) {
-      // Possibly found %E#S or %E#f.
-      int n = 0;
-      if (const char* np = ParseInt(cur, 0, 0, 1024, &n)) {
-        if (*np == 'S' || *np == 'f') {
-          // Formats %E#S or %E#f.
-          if (cur - 2 != pending) {
-            FormatTM(&result, std::string(pending, cur - 2), tm);
-          }
-          bp = ep;
-          if (n > 0) {
-            if (n > kDigits10_64) n = kDigits10_64;
-            bp = Format64(bp, n,
-                          (n > 15) ? fs.count() * kExp10[n - 15]
-                                   : fs.count() / kExp10[15 - n]);
-            if (*np == 'S') *--bp = '.';
-          }
-          if (*np == 'S') bp = Format02d(bp, al.cs.second());
-          result.append(bp, static_cast<std::size_t>(ep - bp));
-          pending = cur = ++np;
-        }
-      }
-    }
-  }
-
-  // Formats any remaining data.
-  if (end != pending) {
-    FormatTM(&result, std::string(pending, end), tm);
-  }
-
-  return result;
-}
-
-namespace {
-
-const char* ParseOffset(const char* dp, const char* mode, int* offset) {
-  if (dp != nullptr) {
-    const char first = *dp++;
-    if (first == '+' || first == '-') {
-      char sep = mode[0];
-      int hours = 0;
-      int minutes = 0;
-      int seconds = 0;
-      const char* ap = ParseInt(dp, 2, 0, 23, &hours);
-      if (ap != nullptr && ap - dp == 2) {
-        dp = ap;
-        if (sep != '\0' && *ap == sep) ++ap;
-        const char* bp = ParseInt(ap, 2, 0, 59, &minutes);
-        if (bp != nullptr && bp - ap == 2) {
-          dp = bp;
-          if (sep != '\0' && *bp == sep) ++bp;
-          const char* cp = ParseInt(bp, 2, 0, 59, &seconds);
-          if (cp != nullptr && cp - bp == 2) dp = cp;
-        }
-        *offset = ((hours * 60 + minutes) * 60) + seconds;
-        if (first == '-') *offset = -*offset;
-      } else {
-        dp = nullptr;
-      }
-    } else if (first == 'Z' || first == 'z') {  // Zulu
-      *offset = 0;
-    } else {
-      dp = nullptr;
-    }
-  }
-  return dp;
-}
-
-const char* ParseZone(const char* dp, std::string* zone) {
-  zone->clear();
-  if (dp != nullptr) {
-    while (*dp != '\0' && !std::isspace(*dp)) zone->push_back(*dp++);
-    if (zone->empty()) dp = nullptr;
-  }
-  return dp;
-}
-
-const char* ParseSubSeconds(const char* dp, detail::femtoseconds* subseconds) {
-  if (dp != nullptr) {
-    std::int_fast64_t v = 0;
-    std::int_fast64_t exp = 0;
-    const char* const bp = dp;
-    while (const char* cp = strchr(kDigits, *dp)) {
-      int d = static_cast<int>(cp - kDigits);
-      if (d >= 10) break;
-      if (exp < 15) {
-        exp += 1;
-        v *= 10;
-        v += d;
-      }
-      ++dp;
-    }
-    if (dp != bp) {
-      v *= kExp10[15 - exp];
-      *subseconds = detail::femtoseconds(v);
-    } else {
-      dp = nullptr;
-    }
-  }
-  return dp;
-}
-
-// Parses a string into a std::tm using strptime(3).
-const char* ParseTM(const char* dp, const char* fmt, std::tm* tm) {
-  if (dp != nullptr) {
-    dp = strptime(dp, fmt, tm);
-  }
-  return dp;
-}
-
-// Sets year, tm_mon and tm_mday given the year, week_num, and tm_wday,
-// and the day on which weeks are defined to start.  Returns false if year
-// would need to move outside its bounds.
-bool FromWeek(int week_num, weekday week_start, year_t* year, std::tm* tm) {
-  const civil_year y(*year % 400);
-  civil_day cd = prev_weekday(y, week_start);  // week 0
-  cd = next_weekday(cd - 1, FromTmWday(tm->tm_wday)) + (week_num * 7);
-  if (const year_t shift = cd.year() - y.year()) {
-    if (shift > 0) {
-      if (*year > std::numeric_limits<year_t>::max() - shift) return false;
-    } else {
-      if (*year < std::numeric_limits<year_t>::min() - shift) return false;
-    }
-    *year += shift;
-  }
-  tm->tm_mon = cd.month() - 1;
-  tm->tm_mday = cd.day();
-  return true;
-}
-
-}  // namespace
-
-// Uses strptime(3) to parse the given input.  Supports the same extended
-// format specifiers as format(), although %E#S and %E*S are treated
-// identically (and similarly for %E#f and %E*f).  %Ez and %E*z also accept
-// the same inputs. %ET accepts either 'T' or 't'.
-//
-// The standard specifiers from RFC3339_* (%Y, %m, %d, %H, %M, and %S) are
-// handled internally so that we can normally avoid strptime() altogether
-// (which is particularly helpful when the native implementation is broken).
-//
-// The TZ/GNU %s extension is handled internally because strptime() has to
-// use localtime_r() to generate it, and that assumes the local time zone.
-//
-// We also handle the %z specifier to accommodate platforms that do not
-// support the tm_gmtoff extension to std::tm.  %Z is parsed but ignored.
-bool parse(const std::string& format, const std::string& input,
-           const time_zone& tz, time_point<seconds>* sec,
-           detail::femtoseconds* fs, std::string* err) {
-  // The unparsed input.
-  const char* data = input.c_str();  // NUL terminated
-
-  // Skips leading whitespace.
-  while (std::isspace(*data)) ++data;
-
-  const year_t kyearmax = std::numeric_limits<year_t>::max();
-  const year_t kyearmin = std::numeric_limits<year_t>::min();
-
-  // Sets default values for unspecified fields.
-  bool saw_year = false;
-  year_t year = 1970;
-  std::tm tm{};
-  tm.tm_year = 1970 - 1900;
-  tm.tm_mon = 1 - 1;  // Jan
-  tm.tm_mday = 1;
-  tm.tm_hour = 0;
-  tm.tm_min = 0;
-  tm.tm_sec = 0;
-  tm.tm_wday = 4;  // Thu
-  tm.tm_yday = 0;
-  tm.tm_isdst = 0;
-  auto subseconds = detail::femtoseconds::zero();
-  bool saw_offset = false;
-  int offset = 0;  // No offset from passed tz.
-  std::string zone = "UTC";
-
-  const char* fmt = format.c_str();  // NUL terminated
-  bool twelve_hour = false;
-  bool afternoon = false;
-  int week_num = -1;
-  weekday week_start = weekday::sunday;
-
-  bool saw_percent_s = false;
-  std::int_fast64_t percent_s = 0;
-
-  // Steps through format, one specifier at a time.
-  while (data != nullptr && *fmt != '\0') {
-    if (std::isspace(*fmt)) {
-      while (std::isspace(*data)) ++data;
-      while (std::isspace(*++fmt)) continue;
-      continue;
-    }
-
-    if (*fmt != '%') {
-      if (*data == *fmt) {
-        ++data;
-        ++fmt;
-      } else {
-        data = nullptr;
-      }
-      continue;
-    }
-
-    const char* percent = fmt;
-    if (*++fmt == '\0') {
-      data = nullptr;
-      continue;
-    }
-    switch (*fmt++) {
-      case 'Y':
-        // Symmetrically with FormatTime(), directly handing %Y avoids the
-        // tm.tm_year overflow problem.  However, tm.tm_year will still be
-        // used by other specifiers like %D.
-        data = ParseInt(data, 0, kyearmin, kyearmax, &year);
-        if (data != nullptr) saw_year = true;
-        continue;
-      case 'm':
-        data = ParseInt(data, 2, 1, 12, &tm.tm_mon);
-        if (data != nullptr) tm.tm_mon -= 1;
-        week_num = -1;
-        continue;
-      case 'd':
-      case 'e':
-        data = ParseInt(data, 2, 1, 31, &tm.tm_mday);
-        week_num = -1;
-        continue;
-      case 'U':
-        data = ParseInt(data, 0, 0, 53, &week_num);
-        week_start = weekday::sunday;
-        continue;
-      case 'W':
-        data = ParseInt(data, 0, 0, 53, &week_num);
-        week_start = weekday::monday;
-        continue;
-      case 'u':
-        data = ParseInt(data, 0, 1, 7, &tm.tm_wday);
-        if (data != nullptr) tm.tm_wday %= 7;
-        continue;
-      case 'w':
-        data = ParseInt(data, 0, 0, 6, &tm.tm_wday);
-        continue;
-      case 'H':
-        data = ParseInt(data, 2, 0, 23, &tm.tm_hour);
-        twelve_hour = false;
-        continue;
-      case 'M':
-        data = ParseInt(data, 2, 0, 59, &tm.tm_min);
-        continue;
-      case 'S':
-        data = ParseInt(data, 2, 0, 60, &tm.tm_sec);
-        continue;
-      case 'I':
-      case 'l':
-      case 'r':  // probably uses %I
-        twelve_hour = true;
-        break;
-      case 'R':  // uses %H
-      case 'T':  // uses %H
-      case 'c':  // probably uses %H
-      case 'X':  // probably uses %H
-        twelve_hour = false;
-        break;
-      case 'z':
-        data = ParseOffset(data, "", &offset);
-        if (data != nullptr) saw_offset = true;
-        continue;
-      case 'Z':  // ignored; zone abbreviations are ambiguous
-        data = ParseZone(data, &zone);
-        continue;
-      case 's':
-        data =
-            ParseInt(data, 0, std::numeric_limits<std::int_fast64_t>::min(),
-                     std::numeric_limits<std::int_fast64_t>::max(), &percent_s);
-        if (data != nullptr) saw_percent_s = true;
-        continue;
-      case ':':
-        if (fmt[0] == 'z' ||
-            (fmt[0] == ':' &&
-             (fmt[1] == 'z' || (fmt[1] == ':' && fmt[2] == 'z')))) {
-          data = ParseOffset(data, ":", &offset);
-          if (data != nullptr) saw_offset = true;
-          fmt += (fmt[0] == 'z') ? 1 : (fmt[1] == 'z') ? 2 : 3;
-          continue;
-        }
-        break;
-      case '%':
-        data = (*data == '%' ? data + 1 : nullptr);
-        continue;
-      case 'E':
-        if (fmt[0] == 'T') {
-          if (*data == 'T' || *data == 't') {
-            ++data;
-            ++fmt;
-          } else {
-            data = nullptr;
-          }
-          continue;
-        }
-        if (fmt[0] == 'z' || (fmt[0] == '*' && fmt[1] == 'z')) {
-          data = ParseOffset(data, ":", &offset);
-          if (data != nullptr) saw_offset = true;
-          fmt += (fmt[0] == 'z') ? 1 : 2;
-          continue;
-        }
-        if (fmt[0] == '*' && fmt[1] == 'S') {
-          data = ParseInt(data, 2, 0, 60, &tm.tm_sec);
-          if (data != nullptr && *data == '.') {
-            data = ParseSubSeconds(data + 1, &subseconds);
-          }
-          fmt += 2;
-          continue;
-        }
-        if (fmt[0] == '*' && fmt[1] == 'f') {
-          if (data != nullptr && std::isdigit(*data)) {
-            data = ParseSubSeconds(data, &subseconds);
-          }
-          fmt += 2;
-          continue;
-        }
-        if (fmt[0] == '4' && fmt[1] == 'Y') {
-          const char* bp = data;
-          data = ParseInt(data, 4, year_t{-999}, year_t{9999}, &year);
-          if (data != nullptr) {
-            if (data - bp == 4) {
-              saw_year = true;
-            } else {
-              data = nullptr;  // stopped too soon
-            }
-          }
-          fmt += 2;
-          continue;
-        }
-        if (std::isdigit(*fmt)) {
-          int n = 0;  // value ignored
-          if (const char* np = ParseInt(fmt, 0, 0, 1024, &n)) {
-            if (*np == 'S') {
-              data = ParseInt(data, 2, 0, 60, &tm.tm_sec);
-              if (data != nullptr && *data == '.') {
-                data = ParseSubSeconds(data + 1, &subseconds);
-              }
-              fmt = ++np;
-              continue;
-            }
-            if (*np == 'f') {
-              if (data != nullptr && std::isdigit(*data)) {
-                data = ParseSubSeconds(data, &subseconds);
-              }
-              fmt = ++np;
-              continue;
-            }
-          }
-        }
-        if (*fmt == 'c') twelve_hour = false;  // probably uses %H
-        if (*fmt == 'X') twelve_hour = false;  // probably uses %H
-        if (*fmt != '\0') ++fmt;
-        break;
-      case 'O':
-        if (*fmt == 'H') twelve_hour = false;
-        if (*fmt == 'I') twelve_hour = true;
-        if (*fmt != '\0') ++fmt;
-        break;
-    }
-
-    // Parses the current specifier.
-    const char* orig_data = data;
-    std::string spec(percent, static_cast<std::size_t>(fmt - percent));
-    data = ParseTM(data, spec.c_str(), &tm);
-
-    // If we successfully parsed %p we need to remember whether the result
-    // was AM or PM so that we can adjust tm_hour before time_zone::lookup().
-    // So reparse the input with a known AM hour, and check if it is shifted
-    // to a PM hour.
-    if (spec == "%p" && data != nullptr) {
-      std::string test_input = "1";
-      test_input.append(orig_data, static_cast<std::size_t>(data - orig_data));
-      const char* test_data = test_input.c_str();
-      std::tm tmp{};
-      ParseTM(test_data, "%I%p", &tmp);
-      afternoon = (tmp.tm_hour == 13);
-    }
-  }
-
-  // Adjust a 12-hour tm_hour value if it should be in the afternoon.
-  if (twelve_hour && afternoon && tm.tm_hour < 12) {
-    tm.tm_hour += 12;
-  }
-
-  if (data == nullptr) {
-    if (err != nullptr) *err = "Failed to parse input";
-    return false;
-  }
-
-  // Skip any remaining whitespace.
-  while (std::isspace(*data)) ++data;
-
-  // parse() must consume the entire input string.
-  if (*data != '\0') {
-    if (err != nullptr) *err = "Illegal trailing data in input string";
-    return false;
-  }
-
-  // If we saw %s then we ignore anything else and return that time.
-  if (saw_percent_s) {
-    *sec = FromUnixSeconds(percent_s);
-    *fs = detail::femtoseconds::zero();
-    return true;
-  }
-
-  // If we saw %z, %Ez, or %E*z then we want to interpret the parsed fields
-  // in UTC and then shift by that offset.  Otherwise we want to interpret
-  // the fields directly in the passed time_zone.
-  time_zone ptz = saw_offset ? utc_time_zone() : tz;
-
-  // Allows a leap second of 60 to normalize forward to the following ":00".
-  if (tm.tm_sec == 60) {
-    tm.tm_sec -= 1;
-    offset -= 1;
-    subseconds = detail::femtoseconds::zero();
-  }
-
-  if (!saw_year) {
-    year = year_t{tm.tm_year};
-    if (year > kyearmax - 1900) {
-      // Platform-dependent, maybe unreachable.
-      if (err != nullptr) *err = "Out-of-range year";
-      return false;
-    }
-    year += 1900;
-  }
-
-  // Compute year, tm.tm_mon and tm.tm_mday if we parsed a week number.
-  if (week_num != -1) {
-    if (!FromWeek(week_num, week_start, &year, &tm)) {
-      if (err != nullptr) *err = "Out-of-range field";
-      return false;
-    }
-  }
-
-  const int month = tm.tm_mon + 1;
-  civil_second cs(year, month, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
-
-  // parse() should not allow normalization. Due to the restricted field
-  // ranges above (see ParseInt()), the only possibility is for days to roll
-  // into months. That is, parsing "Sep 31" should not produce "Oct 1".
-  if (cs.month() != month || cs.day() != tm.tm_mday) {
-    if (err != nullptr) *err = "Out-of-range field";
-    return false;
-  }
-
-  // Accounts for the offset adjustment before converting to absolute time.
-  if ((offset < 0 && cs > civil_second::max() + offset) ||
-      (offset > 0 && cs < civil_second::min() + offset)) {
-    if (err != nullptr) *err = "Out-of-range field";
-    return false;
-  }
-  cs -= offset;
-
-  const auto tp = ptz.lookup(cs).pre;
-  // Checks for overflow/underflow and returns an error as necessary.
-  if (tp == time_point<seconds>::max()) {
-    const auto al = ptz.lookup(time_point<seconds>::max());
-    if (cs > al.cs) {
-      if (err != nullptr) *err = "Out-of-range field";
-      return false;
-    }
-  }
-  if (tp == time_point<seconds>::min()) {
-    const auto al = ptz.lookup(time_point<seconds>::min());
-    if (cs < al.cs) {
-      if (err != nullptr) *err = "Out-of-range field";
-      return false;
-    }
-  }
-
-  *sec = tp;
-  *fs = subseconds;
-  return true;
-}
-
-}  // namespace detail
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_format_test.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_format_test.cc
deleted file mode 100644
index a11f93e..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_format_test.cc
+++ /dev/null
@@ -1,1603 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include <chrono>
-#include <iomanip>
-#include <sstream>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-namespace chrono = std::chrono;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-// This helper is a macro so that failed expectations show up with the
-// correct line numbers.
-#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \
-  do {                                                            \
-    time_zone::absolute_lookup al = tz.lookup(tp);                \
-    EXPECT_EQ(y, al.cs.year());                                   \
-    EXPECT_EQ(m, al.cs.month());                                  \
-    EXPECT_EQ(d, al.cs.day());                                    \
-    EXPECT_EQ(hh, al.cs.hour());                                  \
-    EXPECT_EQ(mm, al.cs.minute());                                \
-    EXPECT_EQ(ss, al.cs.second());                                \
-    EXPECT_EQ(off, al.offset);                                    \
-    EXPECT_TRUE(isdst == al.is_dst);                              \
-    EXPECT_STREQ(zone, al.abbr);                                  \
-  } while (0)
-
-const char RFC3339_full[] = "%Y-%m-%d%ET%H:%M:%E*S%Ez";
-const char RFC3339_sec[] = "%Y-%m-%d%ET%H:%M:%S%Ez";
-
-const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z";
-const char RFC1123_no_wday[] = "%d %b %Y %H:%M:%S %z";
-
-// A helper that tests the given format specifier by itself, and with leading
-// and trailing characters.  For example: TestFormatSpecifier(tp, "%a", "Thu").
-template <typename D>
-void TestFormatSpecifier(time_point<D> tp, time_zone tz, const std::string& fmt,
-                         const std::string& ans) {
-  EXPECT_EQ(ans, format(fmt, tp, tz)) << fmt;
-  EXPECT_EQ("xxx " + ans, format("xxx " + fmt, tp, tz));
-  EXPECT_EQ(ans + " yyy", format(fmt + " yyy", tp, tz));
-  EXPECT_EQ("xxx " + ans + " yyy", format("xxx " + fmt + " yyy", tp, tz));
-}
-
-}  // namespace
-
-//
-// Testing format()
-//
-
-TEST(Format, TimePointResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-  const time_point<chrono::nanoseconds> t0 =
-      chrono::system_clock::from_time_t(1420167845) +
-      chrono::milliseconds(123) + chrono::microseconds(456) +
-      chrono::nanoseconds(789);
-  EXPECT_EQ(
-      "03:04:05.123456789",
-      format(kFmt, chrono::time_point_cast<chrono::nanoseconds>(t0), utc));
-  EXPECT_EQ(
-      "03:04:05.123456",
-      format(kFmt, chrono::time_point_cast<chrono::microseconds>(t0), utc));
-  EXPECT_EQ(
-      "03:04:05.123",
-      format(kFmt, chrono::time_point_cast<chrono::milliseconds>(t0), utc));
-  EXPECT_EQ("03:04:05",
-            format(kFmt, chrono::time_point_cast<chrono::seconds>(t0), utc));
-  EXPECT_EQ(
-      "03:04:05",
-      format(kFmt,
-             chrono::time_point_cast<absl::time_internal::cctz::seconds>(t0),
-             utc));
-  EXPECT_EQ("03:04:00",
-            format(kFmt, chrono::time_point_cast<chrono::minutes>(t0), utc));
-  EXPECT_EQ("03:00:00",
-            format(kFmt, chrono::time_point_cast<chrono::hours>(t0), utc));
-}
-
-TEST(Format, TimePointExtendedResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-  const time_point<absl::time_internal::cctz::seconds> tp =
-      chrono::time_point_cast<absl::time_internal::cctz::seconds>(
-          chrono::system_clock::from_time_t(0)) +
-      chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56);
-
-  EXPECT_EQ(
-      "12:34:56.123456789012345",
-      detail::format(kFmt, tp, detail::femtoseconds(123456789012345), utc));
-  EXPECT_EQ(
-      "12:34:56.012345678901234",
-      detail::format(kFmt, tp, detail::femtoseconds(12345678901234), utc));
-  EXPECT_EQ("12:34:56.001234567890123",
-            detail::format(kFmt, tp, detail::femtoseconds(1234567890123), utc));
-  EXPECT_EQ("12:34:56.000123456789012",
-            detail::format(kFmt, tp, detail::femtoseconds(123456789012), utc));
-
-  EXPECT_EQ("12:34:56.000000000000123",
-            detail::format(kFmt, tp, detail::femtoseconds(123), utc));
-  EXPECT_EQ("12:34:56.000000000000012",
-            detail::format(kFmt, tp, detail::femtoseconds(12), utc));
-  EXPECT_EQ("12:34:56.000000000000001",
-            detail::format(kFmt, tp, detail::femtoseconds(1), utc));
-}
-
-TEST(Format, Basics) {
-  time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-
-  // Starts with a couple basic edge cases.
-  EXPECT_EQ("", format("", tp, tz));
-  EXPECT_EQ(" ", format(" ", tp, tz));
-  EXPECT_EQ("  ", format("  ", tp, tz));
-  EXPECT_EQ("xxx", format("xxx", tp, tz));
-  std::string big(128, 'x');
-  EXPECT_EQ(big, format(big, tp, tz));
-  // Cause the 1024-byte buffer to grow.
-  std::string bigger(100000, 'x');
-  EXPECT_EQ(bigger, format(bigger, tp, tz));
-
-  tp += chrono::hours(13) + chrono::minutes(4) + chrono::seconds(5);
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("1970-01-01", format("%Y-%m-%d", tp, tz));
-  EXPECT_EQ("13:04:05", format("%H:%M:%S", tp, tz));
-  EXPECT_EQ("13:04:05.006", format("%H:%M:%E3S", tp, tz));
-  EXPECT_EQ("13:04:05.006007", format("%H:%M:%E6S", tp, tz));
-  EXPECT_EQ("13:04:05.006007008", format("%H:%M:%E9S", tp, tz));
-}
-
-TEST(Format, PosixConversions) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  TestFormatSpecifier(tp, tz, "%d", "01");
-  TestFormatSpecifier(tp, tz, "%e", " 1");  // extension but internal support
-  TestFormatSpecifier(tp, tz, "%H", "00");
-  TestFormatSpecifier(tp, tz, "%I", "12");
-  TestFormatSpecifier(tp, tz, "%j", "001");
-  TestFormatSpecifier(tp, tz, "%m", "01");
-  TestFormatSpecifier(tp, tz, "%M", "00");
-  TestFormatSpecifier(tp, tz, "%S", "00");
-  TestFormatSpecifier(tp, tz, "%U", "00");
-#if !defined(__EMSCRIPTEN__)
-  TestFormatSpecifier(tp, tz, "%w", "4");  // 4=Thursday
-#endif
-  TestFormatSpecifier(tp, tz, "%W", "00");
-  TestFormatSpecifier(tp, tz, "%y", "70");
-  TestFormatSpecifier(tp, tz, "%Y", "1970");
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%Z", "UTC");
-  TestFormatSpecifier(tp, tz, "%%", "%");
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-  TestFormatSpecifier(tp, tz, "%C", "19");
-  TestFormatSpecifier(tp, tz, "%D", "01/01/70");
-  TestFormatSpecifier(tp, tz, "%F", "1970-01-01");
-  TestFormatSpecifier(tp, tz, "%g", "70");
-  TestFormatSpecifier(tp, tz, "%G", "1970");
-  TestFormatSpecifier(tp, tz, "%k", " 0");
-  TestFormatSpecifier(tp, tz, "%l", "12");
-  TestFormatSpecifier(tp, tz, "%n", "\n");
-  TestFormatSpecifier(tp, tz, "%R", "00:00");
-  TestFormatSpecifier(tp, tz, "%t", "\t");
-  TestFormatSpecifier(tp, tz, "%T", "00:00:00");
-  TestFormatSpecifier(tp, tz, "%u", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%V", "01");
-  TestFormatSpecifier(tp, tz, "%s", "0");
-#endif
-}
-
-TEST(Format, LocaleSpecific) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  TestFormatSpecifier(tp, tz, "%a", "Thu");
-  TestFormatSpecifier(tp, tz, "%A", "Thursday");
-  TestFormatSpecifier(tp, tz, "%b", "Jan");
-  TestFormatSpecifier(tp, tz, "%B", "January");
-
-  // %c should at least produce the numeric year and time-of-day.
-  const std::string s = format("%c", tp, utc_time_zone());
-  EXPECT_THAT(s, testing::HasSubstr("1970"));
-  EXPECT_THAT(s, testing::HasSubstr("00:00:00"));
-
-  TestFormatSpecifier(tp, tz, "%p", "AM");
-  TestFormatSpecifier(tp, tz, "%x", "01/01/70");
-  TestFormatSpecifier(tp, tz, "%X", "00:00:00");
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-  TestFormatSpecifier(tp, tz, "%h", "Jan");  // Same as %b
-  TestFormatSpecifier(tp, tz, "%P", "am");
-  TestFormatSpecifier(tp, tz, "%r", "12:00:00 AM");
-
-  // Modified conversion specifiers %E_
-  TestFormatSpecifier(tp, tz, "%Ec", "Thu Jan  1 00:00:00 1970");
-  TestFormatSpecifier(tp, tz, "%EC", "19");
-  TestFormatSpecifier(tp, tz, "%Ex", "01/01/70");
-  TestFormatSpecifier(tp, tz, "%EX", "00:00:00");
-  TestFormatSpecifier(tp, tz, "%Ey", "70");
-  TestFormatSpecifier(tp, tz, "%EY", "1970");
-
-  // Modified conversion specifiers %O_
-  TestFormatSpecifier(tp, tz, "%Od", "01");
-  TestFormatSpecifier(tp, tz, "%Oe", " 1");
-  TestFormatSpecifier(tp, tz, "%OH", "00");
-  TestFormatSpecifier(tp, tz, "%OI", "12");
-  TestFormatSpecifier(tp, tz, "%Om", "01");
-  TestFormatSpecifier(tp, tz, "%OM", "00");
-  TestFormatSpecifier(tp, tz, "%OS", "00");
-  TestFormatSpecifier(tp, tz, "%Ou", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%OU", "00");
-  TestFormatSpecifier(tp, tz, "%OV", "01");
-  TestFormatSpecifier(tp, tz, "%Ow", "4");  // 4=Thursday
-  TestFormatSpecifier(tp, tz, "%OW", "00");
-  TestFormatSpecifier(tp, tz, "%Oy", "70");
-#endif
-}
-
-TEST(Format, Escaping) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  TestFormatSpecifier(tp, tz, "%%", "%");
-  TestFormatSpecifier(tp, tz, "%%a", "%a");
-  TestFormatSpecifier(tp, tz, "%%b", "%b");
-  TestFormatSpecifier(tp, tz, "%%Ea", "%Ea");
-  TestFormatSpecifier(tp, tz, "%%Es", "%Es");
-  TestFormatSpecifier(tp, tz, "%%E3S", "%E3S");
-  TestFormatSpecifier(tp, tz, "%%OS", "%OS");
-  TestFormatSpecifier(tp, tz, "%%O3S", "%O3S");
-
-  // Multiple levels of escaping.
-  TestFormatSpecifier(tp, tz, "%%%Y", "%1970");
-  TestFormatSpecifier(tp, tz, "%%%E3S", "%00.000");
-  TestFormatSpecifier(tp, tz, "%%%%E3S", "%%E3S");
-}
-
-TEST(Format, ExtendedSeconds) {
-  const time_zone tz = utc_time_zone();
-
-  // No subseconds.
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-  tp += chrono::seconds(5);
-  EXPECT_EQ("05", format("%E*S", tp, tz));
-  EXPECT_EQ("05", format("%E0S", tp, tz));
-  EXPECT_EQ("05.0", format("%E1S", tp, tz));
-  EXPECT_EQ("05.00", format("%E2S", tp, tz));
-  EXPECT_EQ("05.000", format("%E3S", tp, tz));
-  EXPECT_EQ("05.0000", format("%E4S", tp, tz));
-  EXPECT_EQ("05.00000", format("%E5S", tp, tz));
-  EXPECT_EQ("05.000000", format("%E6S", tp, tz));
-  EXPECT_EQ("05.0000000", format("%E7S", tp, tz));
-  EXPECT_EQ("05.00000000", format("%E8S", tp, tz));
-  EXPECT_EQ("05.000000000", format("%E9S", tp, tz));
-  EXPECT_EQ("05.0000000000", format("%E10S", tp, tz));
-  EXPECT_EQ("05.00000000000", format("%E11S", tp, tz));
-  EXPECT_EQ("05.000000000000", format("%E12S", tp, tz));
-  EXPECT_EQ("05.0000000000000", format("%E13S", tp, tz));
-  EXPECT_EQ("05.00000000000000", format("%E14S", tp, tz));
-  EXPECT_EQ("05.000000000000000", format("%E15S", tp, tz));
-
-  // With subseconds.
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("05.006007008", format("%E*S", tp, tz));
-  EXPECT_EQ("05", format("%E0S", tp, tz));
-  EXPECT_EQ("05.0", format("%E1S", tp, tz));
-  EXPECT_EQ("05.00", format("%E2S", tp, tz));
-  EXPECT_EQ("05.006", format("%E3S", tp, tz));
-  EXPECT_EQ("05.0060", format("%E4S", tp, tz));
-  EXPECT_EQ("05.00600", format("%E5S", tp, tz));
-  EXPECT_EQ("05.006007", format("%E6S", tp, tz));
-  EXPECT_EQ("05.0060070", format("%E7S", tp, tz));
-  EXPECT_EQ("05.00600700", format("%E8S", tp, tz));
-  EXPECT_EQ("05.006007008", format("%E9S", tp, tz));
-  EXPECT_EQ("05.0060070080", format("%E10S", tp, tz));
-  EXPECT_EQ("05.00600700800", format("%E11S", tp, tz));
-  EXPECT_EQ("05.006007008000", format("%E12S", tp, tz));
-  EXPECT_EQ("05.0060070080000", format("%E13S", tp, tz));
-  EXPECT_EQ("05.00600700800000", format("%E14S", tp, tz));
-  EXPECT_EQ("05.006007008000000", format("%E15S", tp, tz));
-
-  // Times before the Unix epoch.
-  tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1);
-  EXPECT_EQ("1969-12-31 23:59:59.999999",
-            format("%Y-%m-%d %H:%M:%E*S", tp, tz));
-
-  // Here is a "%E*S" case we got wrong for a while.  While the first
-  // instant below is correctly rendered as "...:07.333304", the second
-  // one used to appear as "...:07.33330499999999999".
-  tp = chrono::system_clock::from_time_t(0) +
-       chrono::microseconds(1395024427333304);
-  EXPECT_EQ("2014-03-17 02:47:07.333304",
-            format("%Y-%m-%d %H:%M:%E*S", tp, tz));
-  tp += chrono::microseconds(1);
-  EXPECT_EQ("2014-03-17 02:47:07.333305",
-            format("%Y-%m-%d %H:%M:%E*S", tp, tz));
-}
-
-TEST(Format, ExtendedSubeconds) {
-  const time_zone tz = utc_time_zone();
-
-  // No subseconds.
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-  tp += chrono::seconds(5);
-  EXPECT_EQ("0", format("%E*f", tp, tz));
-  EXPECT_EQ("", format("%E0f", tp, tz));
-  EXPECT_EQ("0", format("%E1f", tp, tz));
-  EXPECT_EQ("00", format("%E2f", tp, tz));
-  EXPECT_EQ("000", format("%E3f", tp, tz));
-  EXPECT_EQ("0000", format("%E4f", tp, tz));
-  EXPECT_EQ("00000", format("%E5f", tp, tz));
-  EXPECT_EQ("000000", format("%E6f", tp, tz));
-  EXPECT_EQ("0000000", format("%E7f", tp, tz));
-  EXPECT_EQ("00000000", format("%E8f", tp, tz));
-  EXPECT_EQ("000000000", format("%E9f", tp, tz));
-  EXPECT_EQ("0000000000", format("%E10f", tp, tz));
-  EXPECT_EQ("00000000000", format("%E11f", tp, tz));
-  EXPECT_EQ("000000000000", format("%E12f", tp, tz));
-  EXPECT_EQ("0000000000000", format("%E13f", tp, tz));
-  EXPECT_EQ("00000000000000", format("%E14f", tp, tz));
-  EXPECT_EQ("000000000000000", format("%E15f", tp, tz));
-
-  // With subseconds.
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("006007008", format("%E*f", tp, tz));
-  EXPECT_EQ("", format("%E0f", tp, tz));
-  EXPECT_EQ("0", format("%E1f", tp, tz));
-  EXPECT_EQ("00", format("%E2f", tp, tz));
-  EXPECT_EQ("006", format("%E3f", tp, tz));
-  EXPECT_EQ("0060", format("%E4f", tp, tz));
-  EXPECT_EQ("00600", format("%E5f", tp, tz));
-  EXPECT_EQ("006007", format("%E6f", tp, tz));
-  EXPECT_EQ("0060070", format("%E7f", tp, tz));
-  EXPECT_EQ("00600700", format("%E8f", tp, tz));
-  EXPECT_EQ("006007008", format("%E9f", tp, tz));
-  EXPECT_EQ("0060070080", format("%E10f", tp, tz));
-  EXPECT_EQ("00600700800", format("%E11f", tp, tz));
-  EXPECT_EQ("006007008000", format("%E12f", tp, tz));
-  EXPECT_EQ("0060070080000", format("%E13f", tp, tz));
-  EXPECT_EQ("00600700800000", format("%E14f", tp, tz));
-  EXPECT_EQ("006007008000000", format("%E15f", tp, tz));
-
-  // Times before the Unix epoch.
-  tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1);
-  EXPECT_EQ("1969-12-31 23:59:59.999999",
-            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz));
-
-  // Here is a "%E*S" case we got wrong for a while.  While the first
-  // instant below is correctly rendered as "...:07.333304", the second
-  // one used to appear as "...:07.33330499999999999".
-  tp = chrono::system_clock::from_time_t(0) +
-       chrono::microseconds(1395024427333304);
-  EXPECT_EQ("2014-03-17 02:47:07.333304",
-            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz));
-  tp += chrono::microseconds(1);
-  EXPECT_EQ("2014-03-17 02:47:07.333305",
-            format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz));
-}
-
-TEST(Format, CompareExtendSecondsVsSubseconds) {
-  const time_zone tz = utc_time_zone();
-
-  // This test case illustrates the differences/similarities between:
-  //   fmt_A: %E<prec>S
-  //   fmt_B: %S.%E<prec>f
-  auto fmt_A = [](const std::string& prec) { return "%E" + prec + "S"; };
-  auto fmt_B = [](const std::string& prec) { return "%S.%E" + prec + "f"; };
-
-  // No subseconds:
-  time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0);
-  tp += chrono::seconds(5);
-  // ... %E*S and %S.%E*f are different.
-  EXPECT_EQ("05", format(fmt_A("*"), tp, tz));
-  EXPECT_EQ("05.0", format(fmt_B("*"), tp, tz));
-  // ... %E0S and %S.%E0f are different.
-  EXPECT_EQ("05", format(fmt_A("0"), tp, tz));
-  EXPECT_EQ("05.", format(fmt_B("0"), tp, tz));
-  // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15].
-  for (int prec = 1; prec <= 15; ++prec) {
-    const std::string a = format(fmt_A(std::to_string(prec)), tp, tz);
-    const std::string b = format(fmt_B(std::to_string(prec)), tp, tz);
-    EXPECT_EQ(a, b) << "prec=" << prec;
-  }
-
-  // With subseconds:
-  // ... %E*S and %S.%E*f are the same.
-  tp += chrono::milliseconds(6) + chrono::microseconds(7) +
-        chrono::nanoseconds(8);
-  EXPECT_EQ("05.006007008", format(fmt_A("*"), tp, tz));
-  EXPECT_EQ("05.006007008", format(fmt_B("*"), tp, tz));
-  // ... %E0S and %S.%E0f are different.
-  EXPECT_EQ("05", format(fmt_A("0"), tp, tz));
-  EXPECT_EQ("05.", format(fmt_B("0"), tp, tz));
-  // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15].
-  for (int prec = 1; prec <= 15; ++prec) {
-    const std::string a = format(fmt_A(std::to_string(prec)), tp, tz);
-    const std::string b = format(fmt_B(std::to_string(prec)), tp, tz);
-    EXPECT_EQ(a, b) << "prec=" << prec;
-  }
-}
-
-TEST(Format, ExtendedOffset) {
-  const auto tp = chrono::system_clock::from_time_t(0);
-
-  auto tz = fixed_time_zone(absl::time_internal::cctz::seconds::zero());
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:00");
-
-  tz = fixed_time_zone(chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:00");
-
-  tz = fixed_time_zone(-chrono::seconds(56));  // NOTE: +00:00
-  TestFormatSpecifier(tp, tz, "%z", "+0000");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:00");
-
-  tz = fixed_time_zone(chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "+0034");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:34");
-
-  tz = fixed_time_zone(-chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "-0034");
-  TestFormatSpecifier(tp, tz, "%:z", "-00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-00:34");
-
-  tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+0034");
-  TestFormatSpecifier(tp, tz, "%:z", "+00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+00:34");
-
-  tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "-0034");
-  TestFormatSpecifier(tp, tz, "%:z", "-00:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-00:34");
-
-  tz = fixed_time_zone(chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%z", "+1200");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:00");
-
-  tz = fixed_time_zone(-chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%z", "-1200");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:00");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+1200");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:00");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "-1200");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:00");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:00");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "+1234");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:34");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%z", "-1234");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:34");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) +
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "+1234");
-  TestFormatSpecifier(tp, tz, "%:z", "+12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "+12:34");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) -
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%z", "-1234");
-  TestFormatSpecifier(tp, tz, "%:z", "-12:34");
-  TestFormatSpecifier(tp, tz, "%Ez", "-12:34");
-}
-
-TEST(Format, ExtendedSecondOffset) {
-  const auto tp = chrono::system_clock::from_time_t(0);
-
-  auto tz = fixed_time_zone(absl::time_internal::cctz::seconds::zero());
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:00:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:00:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00");
-
-  tz = fixed_time_zone(chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00:00:56");
-
-  tz = fixed_time_zone(-chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-00:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-00:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-00:00:56");
-
-  tz = fixed_time_zone(chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00:34");
-
-  tz = fixed_time_zone(-chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "-00:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "-00:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "-00:34");
-
-  tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+00:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+00:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+00:34:56");
-
-  tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-00:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-00:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-00:34:56");
-
-  tz = fixed_time_zone(chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:00:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:00:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12");
-
-  tz = fixed_time_zone(-chrono::hours(12));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:00:00");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:00:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12:00:56");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:00:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:00:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12:00:56");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12:34");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:34:00");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:34:00");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12:34");
-
-  tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) +
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "+12:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "+12:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "+12:34:56");
-
-  tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) -
-                       chrono::seconds(56));
-  TestFormatSpecifier(tp, tz, "%E*z", "-12:34:56");
-  TestFormatSpecifier(tp, tz, "%::z", "-12:34:56");
-  TestFormatSpecifier(tp, tz, "%:::z", "-12:34:56");
-}
-
-TEST(Format, ExtendedYears) {
-  const time_zone utc = utc_time_zone();
-  const char e4y_fmt[] = "%E4Y%m%d";  // no separators
-
-  // %E4Y zero-pads the year to produce at least 4 chars, including the sign.
-  auto tp = convert(civil_second(-999, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-9991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(-99, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-0991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(-9, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-0091127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(-1, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-0011127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(0, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00001127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(1, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00011127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(9, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00091127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(99, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("00991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(999, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("09991127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(9999, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("99991127", format(e4y_fmt, tp, utc));
-
-  // When the year is outside [-999:9999], more than 4 chars are produced.
-  tp = convert(civil_second(-1000, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("-10001127", format(e4y_fmt, tp, utc));
-  tp = convert(civil_second(10000, 11, 27, 0, 0, 0), utc);
-  EXPECT_EQ("100001127", format(e4y_fmt, tp, utc));
-}
-
-TEST(Format, RFC3339Format) {
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-
-  time_point<chrono::nanoseconds> tp =
-      convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::milliseconds(100);
-  EXPECT_EQ("1977-06-28T09:08:07.1-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::milliseconds(20);
-  EXPECT_EQ("1977-06-28T09:08:07.12-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::milliseconds(3);
-  EXPECT_EQ("1977-06-28T09:08:07.123-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::microseconds(400);
-  EXPECT_EQ("1977-06-28T09:08:07.1234-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::microseconds(50);
-  EXPECT_EQ("1977-06-28T09:08:07.12345-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::microseconds(6);
-  EXPECT_EQ("1977-06-28T09:08:07.123456-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::nanoseconds(700);
-  EXPECT_EQ("1977-06-28T09:08:07.1234567-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::nanoseconds(80);
-  EXPECT_EQ("1977-06-28T09:08:07.12345678-07:00", format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-
-  tp += chrono::nanoseconds(9);
-  EXPECT_EQ("1977-06-28T09:08:07.123456789-07:00",
-            format(RFC3339_full, tp, tz));
-  EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz));
-}
-
-TEST(Format, RFC1123Format) {  // locale specific
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-
-  auto tp = convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-  EXPECT_EQ("Tue, 28 Jun 1977 09:08:07 -0700", format(RFC1123_full, tp, tz));
-  EXPECT_EQ("28 Jun 1977 09:08:07 -0700", format(RFC1123_no_wday, tp, tz));
-}
-
-TEST(Format, Week) {
-  const time_zone utc = utc_time_zone();
-
-  auto tp = convert(civil_second(2017, 1, 1, 0, 0, 0), utc);
-  EXPECT_EQ("2017-01-7", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2017-00-0", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2017, 12, 31, 0, 0, 0), utc);
-  EXPECT_EQ("2017-53-7", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2017-52-0", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2018, 1, 1, 0, 0, 0), utc);
-  EXPECT_EQ("2018-00-1", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2018-01-1", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2018, 12, 31, 0, 0, 0), utc);
-  EXPECT_EQ("2018-52-1", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2018-53-1", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2019, 1, 1, 0, 0, 0), utc);
-  EXPECT_EQ("2019-00-2", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2019-00-2", format("%Y-%W-%w", tp, utc));
-
-  tp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc);
-  EXPECT_EQ("2019-52-2", format("%Y-%U-%u", tp, utc));
-  EXPECT_EQ("2019-52-2", format("%Y-%W-%w", tp, utc));
-}
-
-//
-// Testing parse()
-//
-
-TEST(Parse, TimePointResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-
-  time_point<chrono::nanoseconds> tp_ns;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_ns));
-  EXPECT_EQ("03:04:05.123456789", format(kFmt, tp_ns, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ns));
-  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_ns, utc));
-
-  time_point<chrono::microseconds> tp_us;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_us));
-  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_us));
-  EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_us));
-  EXPECT_EQ("03:04:05.123", format(kFmt, tp_us, utc));
-
-  time_point<chrono::milliseconds> tp_ms;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ms));
-  EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_ms));
-  EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_ms));
-  EXPECT_EQ("03:04:05", format(kFmt, tp_ms, utc));
-
-  time_point<chrono::seconds> tp_s;
-  EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_s));
-  EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc));
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_s));
-  EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc));
-
-  time_point<chrono::minutes> tp_m;
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_m));
-  EXPECT_EQ("03:04:00", format(kFmt, tp_m, utc));
-
-  time_point<chrono::hours> tp_h;
-  EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_h));
-  EXPECT_EQ("03:00:00", format(kFmt, tp_h, utc));
-}
-
-TEST(Parse, TimePointExtendedResolution) {
-  const char kFmt[] = "%H:%M:%E*S";
-  const time_zone utc = utc_time_zone();
-
-  time_point<absl::time_internal::cctz::seconds> tp;
-  detail::femtoseconds fs;
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.123456789012345", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.123456789012345", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.012345678901234", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.012345678901234", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.001234567890123", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.001234567890123", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000123", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.000000000000123", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000012", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.000000000000012", detail::format(kFmt, tp, fs, utc));
-  EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000001", utc, &tp, &fs));
-  EXPECT_EQ("12:34:56.000000000000001", detail::format(kFmt, tp, fs, utc));
-}
-
-TEST(Parse, Basics) {
-  time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp =
-      chrono::system_clock::from_time_t(1234567890);
-
-  // Simple edge cases.
-  EXPECT_TRUE(parse("", "", tz, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(0), tp);  // everything defaulted
-  EXPECT_TRUE(parse(" ", " ", tz, &tp));
-  EXPECT_TRUE(parse("  ", "  ", tz, &tp));
-  EXPECT_TRUE(parse("x", "x", tz, &tp));
-  EXPECT_TRUE(parse("xxx", "xxx", tz, &tp));
-
-  EXPECT_TRUE(
-      parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 -0800", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 29, 3, 8, 9, 0, false, "UTC");
-}
-
-TEST(Parse, WithTimeZone) {
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-  time_point<chrono::nanoseconds> tp;
-
-  // We can parse a string without a UTC offset if we supply a timezone.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2013-06-28 19:08:09", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 19, 8, 9, -7 * 60 * 60, true, "PDT");
-
-  // But the timezone is ignored when a UTC offset is present.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 +0800",
-                    utc_time_zone(), &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 19 - 8 - 7, 8, 9, -7 * 60 * 60, true, "PDT");
-
-  // Check a skipped time (a Spring DST transition). parse() uses the
-  // pre-transition offset.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-03-13 02:15:00", tz, &tp));
-  ExpectTime(tp, tz, 2011, 3, 13, 3, 15, 0, -7 * 60 * 60, true, "PDT");
-
-  // Check a repeated time (a Fall DST transition).  parse() uses the
-  // pre-transition offset.
-  EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-11-06 01:15:00", tz, &tp));
-  ExpectTime(tp, tz, 2011, 11, 6, 1, 15, 0, -7 * 60 * 60, true, "PDT");
-}
-
-TEST(Parse, LeapSecond) {
-  time_zone tz;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz));
-  time_point<chrono::nanoseconds> tp;
-
-  // ":59" -> ":59"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT");
-
-  // ":59.5" -> ":59.5"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59.5-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT");
-
-  // ":60" -> ":00"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT");
-
-  // ":60.5" -> ":00.0"
-  EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60.5-08:00", tz, &tp));
-  ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT");
-
-  // ":61" -> error
-  EXPECT_FALSE(parse(RFC3339_full, "2013-06-28T07:08:61-08:00", tz, &tp));
-}
-
-TEST(Parse, ErrorCases) {
-  const time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-
-  // Illegal trailing data.
-  EXPECT_FALSE(parse("%S", "123", tz, &tp));
-
-  // Can't parse an illegal format specifier.
-  EXPECT_FALSE(parse("%Q", "x", tz, &tp));
-
-  // Fails because of trailing, unparsed data "blah".
-  EXPECT_FALSE(parse("%m-%d", "2-3 blah", tz, &tp));
-
-  // Trailing whitespace is allowed.
-  EXPECT_TRUE(parse("%m-%d", "2-3  ", tz, &tp));
-  EXPECT_EQ(2, convert(tp, utc_time_zone()).month());
-  EXPECT_EQ(3, convert(tp, utc_time_zone()).day());
-
-  // Feb 31 requires normalization.
-  EXPECT_FALSE(parse("%m-%d", "2-31", tz, &tp));
-
-  // Check that we cannot have spaces in UTC offsets.
-  EXPECT_TRUE(parse("%z", "-0203", tz, &tp));
-  EXPECT_FALSE(parse("%z", "- 2 3", tz, &tp));
-  EXPECT_TRUE(parse("%Ez", "-02:03", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "- 2: 3", tz, &tp));
-
-  // Check that we reject other malformed UTC offsets.
-  EXPECT_FALSE(parse("%Ez", "+-08:00", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "-+08:00", tz, &tp));
-
-  // Check that we do not accept "-0" in fields that allow zero.
-  EXPECT_FALSE(parse("%Y", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%E4Y", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%H", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%M", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%S", "-0", tz, &tp));
-  EXPECT_FALSE(parse("%z", "+-000", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "+-0:00", tz, &tp));
-  EXPECT_FALSE(parse("%z", "-00-0", tz, &tp));
-  EXPECT_FALSE(parse("%Ez", "-00:-0", tz, &tp));
-}
-
-TEST(Parse, PosixConversions) {
-  time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-  const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-
-  tp = reset;
-  EXPECT_TRUE(parse("%d", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());
-
-  // %e is an extension, but is supported internally.
-  tp = reset;
-  EXPECT_TRUE(parse("%e", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());  // Equivalent to %d
-
-  tp = reset;
-  EXPECT_TRUE(parse("%H", "17", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%I", "5", tz, &tp));
-  EXPECT_EQ(5, convert(tp, tz).hour());
-
-  // %j is parsed but ignored.
-  EXPECT_TRUE(parse("%j", "32", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%m", "11", tz, &tp));
-  EXPECT_EQ(11, convert(tp, tz).month());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%M", "33", tz, &tp));
-  EXPECT_EQ(33, convert(tp, tz).minute());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%S", "55", tz, &tp));
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  // %U is parsed but ignored.
-  EXPECT_TRUE(parse("%U", "15", tz, &tp));
-
-  // %w is parsed but ignored.
-  EXPECT_TRUE(parse("%w", "2", tz, &tp));
-
-  // %W is parsed but ignored.
-  EXPECT_TRUE(parse("%W", "22", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%y", "04", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Y", "2004", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  EXPECT_TRUE(parse("%%", "%", tz, &tp));
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-
-  // Because we handle each (non-internal) specifier in a separate call
-  // to strptime(), there is no way to group %C and %y together.  So we
-  // just skip the %C/%y case.
-#if 0
-  tp = reset;
-  EXPECT_TRUE(parse("%C %y", "20 04", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-#endif
-
-  tp = reset;
-  EXPECT_TRUE(parse("%D", "02/03/04", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-  EXPECT_EQ(3, convert(tp, tz).day());
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  EXPECT_TRUE(parse("%n", "\n", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%R", "03:44", tz, &tp));
-  EXPECT_EQ(3, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-
-  EXPECT_TRUE(parse("%t", "\t\v\f\n\r ", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%T", "03:44:55", tz, &tp));
-  EXPECT_EQ(3, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1234567890", tz, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp);
-
-  // %s conversion, like %z/%Ez, pays no heed to the optional zone.
-  time_zone lax;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax));
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1234567890", lax, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp);
-
-  // This is most important when the time has the same YMDhms
-  // breakdown in the zone as some other time.  For example, ...
-  //  1414917000 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PDT)
-  //  1414920600 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PST)
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1414917000", lax, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1414917000), tp);
-  tp = reset;
-  EXPECT_TRUE(parse("%s", "1414920600", lax, &tp));
-  EXPECT_EQ(chrono::system_clock::from_time_t(1414920600), tp);
-#endif
-}
-
-TEST(Parse, LocaleSpecific) {
-  time_zone tz = utc_time_zone();
-  auto tp = chrono::system_clock::from_time_t(0);
-  const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz);
-
-  // %a is parsed but ignored.
-  EXPECT_TRUE(parse("%a", "Mon", tz, &tp));
-
-  // %A is parsed but ignored.
-  EXPECT_TRUE(parse("%A", "Monday", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%b", "Feb", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%B", "February", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-
-  // %p is parsed but ignored if it's alone.  But it's used with %I.
-  EXPECT_TRUE(parse("%p", "AM", tz, &tp));
-  tp = reset;
-  EXPECT_TRUE(parse("%I %p", "5 PM", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%x", "02/03/04", tz, &tp));
-  if (convert(tp, tz).month() == 2) {
-    EXPECT_EQ(3, convert(tp, tz).day());
-  } else {
-    EXPECT_EQ(2, convert(tp, tz).day());
-    EXPECT_EQ(3, convert(tp, tz).month());
-  }
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%X", "15:44:55", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-#if defined(__linux__)
-  // SU/C99/TZ extensions
-
-  tp = reset;
-  EXPECT_TRUE(parse("%h", "Feb", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());  // Equivalent to %b
-
-  tp = reset;
-  EXPECT_TRUE(parse("%l %p", "5 PM", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%r", "03:44:55 PM", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Ec", "Tue Nov 19 05:06:07 2013", tz, &tp));
-  EXPECT_EQ(convert(civil_second(2013, 11, 19, 5, 6, 7), tz), tp);
-
-  // Modified conversion specifiers %E_
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Ex", "02/03/04", tz, &tp));
-  EXPECT_EQ(2, convert(tp, tz).month());
-  EXPECT_EQ(3, convert(tp, tz).day());
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%EX", "15:44:55", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).hour());
-  EXPECT_EQ(44, convert(tp, tz).minute());
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  // %Ey, the year offset from %EC, doesn't really make sense alone as there
-  // is no way to represent it in tm_year (%EC is not simply the century).
-  // Yet, because we handle each (non-internal) specifier in a separate call
-  // to strptime(), there is no way to group %EC and %Ey either.  So we just
-  // skip the %EC and %Ey cases.
-
-  tp = reset;
-  EXPECT_TRUE(parse("%EY", "2004", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-
-  // Modified conversion specifiers %O_
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Od", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Oe", "15", tz, &tp));
-  EXPECT_EQ(15, convert(tp, tz).day());  // Equivalent to %d
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OH", "17", tz, &tp));
-  EXPECT_EQ(17, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OI", "5", tz, &tp));
-  EXPECT_EQ(5, convert(tp, tz).hour());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Om", "11", tz, &tp));
-  EXPECT_EQ(11, convert(tp, tz).month());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OM", "33", tz, &tp));
-  EXPECT_EQ(33, convert(tp, tz).minute());
-
-  tp = reset;
-  EXPECT_TRUE(parse("%OS", "55", tz, &tp));
-  EXPECT_EQ(55, convert(tp, tz).second());
-
-  // %OU is parsed but ignored.
-  EXPECT_TRUE(parse("%OU", "15", tz, &tp));
-
-  // %Ow is parsed but ignored.
-  EXPECT_TRUE(parse("%Ow", "2", tz, &tp));
-
-  // %OW is parsed but ignored.
-  EXPECT_TRUE(parse("%OW", "22", tz, &tp));
-
-  tp = reset;
-  EXPECT_TRUE(parse("%Oy", "04", tz, &tp));
-  EXPECT_EQ(2004, convert(tp, tz).year());
-#endif
-}
-
-TEST(Parse, ExtendedSeconds) {
-  const time_zone tz = utc_time_zone();
-  const time_point<chrono::nanoseconds> unix_epoch =
-      chrono::system_clock::from_time_t(0);
-
-  // All %E<prec>S cases are treated the same as %E*S on input.
-  auto precisions = {"*", "0", "1",  "2",  "3",  "4",  "5",  "6", "7",
-                     "8", "9", "10", "11", "12", "13", "14", "15"};
-  for (const std::string& prec : precisions) {
-    const std::string fmt = "%E" + prec + "S";
-    SCOPED_TRACE(fmt);
-    time_point<chrono::nanoseconds> tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "5", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.0", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.00", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.6", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.60", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.600", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.67", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.670", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "05.678", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(678), tp);
-  }
-
-  // Here is a "%E*S" case we got wrong for a while.  The fractional
-  // part of the first instant is less than 2^31 and was correctly
-  // parsed, while the second (and any subsecond field >=2^31) failed.
-  time_point<chrono::nanoseconds> tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*S", "0.2147483647", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-  tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*S", "0.2147483648", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-
-  // We should also be able to specify long strings of digits far
-  // beyond the current resolution and have them convert the same way.
-  tp = unix_epoch;
-  EXPECT_TRUE(parse(
-      "%E*S", "0.214748364801234567890123456789012345678901234567890123456789",
-      tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-}
-
-TEST(Parse, ExtendedSecondsScan) {
-  const time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp;
-  for (int ms = 0; ms < 1000; ms += 111) {
-    for (int us = 0; us < 1000; us += 27) {
-      const int micros = ms * 1000 + us;
-      for (int ns = 0; ns < 1000; ns += 9) {
-        const auto expected = chrono::system_clock::from_time_t(0) +
-                              chrono::nanoseconds(micros * 1000 + ns);
-        std::ostringstream oss;
-        oss << "0." << std::setfill('0') << std::setw(3);
-        oss << ms << std::setw(3) << us << std::setw(3) << ns;
-        const std::string input = oss.str();
-        EXPECT_TRUE(parse("%E*S", input, tz, &tp));
-        EXPECT_EQ(expected, tp) << input;
-      }
-    }
-  }
-}
-
-TEST(Parse, ExtendedSubeconds) {
-  const time_zone tz = utc_time_zone();
-  const time_point<chrono::nanoseconds> unix_epoch =
-      chrono::system_clock::from_time_t(0);
-
-  // All %E<prec>f cases are treated the same as %E*f on input.
-  auto precisions = {"*", "0", "1",  "2",  "3",  "4",  "5",  "6", "7",
-                     "8", "9", "10", "11", "12", "13", "14", "15"};
-  for (const std::string& prec : precisions) {
-    const std::string fmt = "%E" + prec + "f";
-    SCOPED_TRACE(fmt);
-    time_point<chrono::nanoseconds> tp = unix_epoch - chrono::seconds(1);
-    EXPECT_TRUE(parse(fmt, "", tz, &tp));
-    EXPECT_EQ(unix_epoch, tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "6", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "60", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "600", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "67", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "670", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "678", tz, &tp));
-    EXPECT_EQ(unix_epoch + chrono::milliseconds(678), tp);
-    tp = unix_epoch;
-    EXPECT_TRUE(parse(fmt, "6789", tz, &tp));
-    EXPECT_EQ(
-        unix_epoch + chrono::milliseconds(678) + chrono::microseconds(900), tp);
-  }
-
-  // Here is a "%E*f" case we got wrong for a while.  The fractional
-  // part of the first instant is less than 2^31 and was correctly
-  // parsed, while the second (and any subsecond field >=2^31) failed.
-  time_point<chrono::nanoseconds> tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*f", "2147483647", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-  tp = unix_epoch;
-  EXPECT_TRUE(parse("%E*f", "2147483648", tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-
-  // We should also be able to specify long strings of digits far
-  // beyond the current resolution and have them convert the same way.
-  tp = unix_epoch;
-  EXPECT_TRUE(parse(
-      "%E*f", "214748364801234567890123456789012345678901234567890123456789",
-      tz, &tp));
-  EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp);
-}
-
-TEST(Parse, ExtendedSubecondsScan) {
-  time_point<chrono::nanoseconds> tp;
-  const time_zone tz = utc_time_zone();
-  for (int ms = 0; ms < 1000; ms += 111) {
-    for (int us = 0; us < 1000; us += 27) {
-      const int micros = ms * 1000 + us;
-      for (int ns = 0; ns < 1000; ns += 9) {
-        std::ostringstream oss;
-        oss << std::setfill('0') << std::setw(3) << ms;
-        oss << std::setw(3) << us << std::setw(3) << ns;
-        const std::string nanos = oss.str();
-        const auto expected = chrono::system_clock::from_time_t(0) +
-                              chrono::nanoseconds(micros * 1000 + ns);
-        for (int ps = 0; ps < 1000; ps += 250) {
-          std::ostringstream ps_oss;
-          oss << std::setfill('0') << std::setw(3) << ps;
-          const std::string input = nanos + ps_oss.str() + "999";
-          EXPECT_TRUE(parse("%E*f", input, tz, &tp));
-          EXPECT_EQ(expected + chrono::nanoseconds(ps) / 1000, tp) << input;
-        }
-      }
-    }
-  }
-}
-
-TEST(Parse, ExtendedOffset) {
-  const time_zone utc = utc_time_zone();
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  EXPECT_TRUE(parse("%Ez", "+00:00", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse("%Ez", "-12:34", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-  EXPECT_TRUE(parse("%Ez", "+12:34", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-  EXPECT_FALSE(parse("%Ez", "-12:3", utc, &tp));
-
-  for (auto fmt : {"%Ez", "%z"}) {
-    EXPECT_TRUE(parse(fmt, "+0000", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-123", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-1", utc, &tp));
-  }
-}
-
-TEST(Parse, ExtendedSecondOffset) {
-  const time_zone utc = utc_time_zone();
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  for (auto fmt : {"%Ez", "%E*z", "%:z", "%::z", "%:::z"}) {
-    EXPECT_TRUE(parse(fmt, "+00:00:00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12:34:56", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12:34:56", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-12:34:5", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+000000", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-123456", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+123456", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-12345", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+00:00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12:34", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12:34", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-12:3", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+0000", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+1234", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-123", utc, &tp));
-
-    EXPECT_TRUE(parse(fmt, "+00", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "-12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp);
-    EXPECT_TRUE(parse(fmt, "+12", utc, &tp));
-    EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp);
-    EXPECT_FALSE(parse(fmt, "-1", utc, &tp));
-  }
-}
-
-TEST(Parse, ExtendedYears) {
-  const time_zone utc = utc_time_zone();
-  const char e4y_fmt[] = "%E4Y%m%d";  // no separators
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  // %E4Y consumes exactly four chars, including any sign.
-  EXPECT_TRUE(parse(e4y_fmt, "-9991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-999, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "-0991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-99, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "-0091127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-9, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "-0011127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(-1, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00001127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(0, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00011127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(1, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00091127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(9, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "00991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(99, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "09991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(999, 11, 27, 0, 0, 0), utc), tp);
-  EXPECT_TRUE(parse(e4y_fmt, "99991127", utc, &tp));
-  EXPECT_EQ(convert(civil_second(9999, 11, 27, 0, 0, 0), utc), tp);
-
-  // When the year is outside [-999:9999], the parse fails.
-  EXPECT_FALSE(parse(e4y_fmt, "-10001127", utc, &tp));
-  EXPECT_FALSE(parse(e4y_fmt, "100001127", utc, &tp));
-}
-
-TEST(Parse, RFC3339Format) {
-  const time_zone tz = utc_time_zone();
-  time_point<chrono::nanoseconds> tp;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00+00:00", tz, &tp));
-  ExpectTime(tp, tz, 2014, 2, 12, 20, 21, 0, 0, false, "UTC");
-
-  // Check that %ET also accepts "t".
-  time_point<chrono::nanoseconds> tp2;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12t20:21:00+00:00", tz, &tp2));
-  EXPECT_EQ(tp, tp2);
-
-  // Check that %Ez also accepts "Z" as a synonym for "+00:00".
-  time_point<chrono::nanoseconds> tp3;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00Z", tz, &tp3));
-  EXPECT_EQ(tp, tp3);
-
-  // Check that %Ez also accepts "z" as a synonym for "+00:00".
-  time_point<chrono::nanoseconds> tp4;
-  EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00z", tz, &tp4));
-  EXPECT_EQ(tp, tp4);
-}
-
-TEST(Parse, Week) {
-  const time_zone utc = utc_time_zone();
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  auto exp = convert(civil_second(2017, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2017-01-7", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2017-00-0", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2017, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2017-53-7", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2017-52-0", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2018, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2018-00-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2018-01-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2018, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2018-52-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2018-53-1", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2019, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2019-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2019-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2019-52-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2019-52-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-}
-
-TEST(Parse, WeekYearShift) {
-  // %U/%W conversions with week values in {0, 52, 53} can slip
-  // into the previous/following calendar years.
-  const time_zone utc = utc_time_zone();
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  auto exp = convert(civil_second(2019, 12, 31, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2020-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2020-00-2", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  exp = convert(civil_second(2021, 1, 1, 0, 0, 0), utc);
-  EXPECT_TRUE(parse("%Y-%U-%u", "2020-52-5", utc, &tp));
-  EXPECT_EQ(exp, tp);
-  EXPECT_TRUE(parse("%Y-%W-%w", "2020-52-5", utc, &tp));
-  EXPECT_EQ(exp, tp);
-
-  // Slipping into the previous/following calendar years should fail when
-  // we're already at the extremes.
-  EXPECT_FALSE(parse("%Y-%U-%u", "-9223372036854775808-0-7", utc, &tp));
-  EXPECT_FALSE(parse("%Y-%U-%u", "9223372036854775807-53-7", utc, &tp));
-}
-
-TEST(Parse, MaxRange) {
-  const time_zone utc = utc_time_zone();
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  // tests the upper limit using +00:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "292277026596-12-04T15:30:07+00:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::max());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "292277026596-12-04T15:30:08+00:00", utc, &tp));
-
-  // tests the upper limit using -01:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "292277026596-12-04T14:30:07-01:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::max());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "292277026596-12-04T15:30:07-01:00", utc, &tp));
-
-  // tests the lower limit using +00:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "-292277022657-01-27T08:29:52+00:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::min());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "-292277022657-01-27T08:29:51+00:00", utc, &tp));
-
-  // tests the lower limit using +01:00 offset
-  EXPECT_TRUE(
-      parse(RFC3339_sec, "-292277022657-01-27T09:29:52+01:00", utc, &tp));
-  EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::min());
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "-292277022657-01-27T08:29:51+01:00", utc, &tp));
-
-  // tests max/min civil-second overflow
-  EXPECT_FALSE(
-      parse(RFC3339_sec, "9223372036854775807-12-31T23:59:59-00:01", utc, &tp));
-  EXPECT_FALSE(parse(RFC3339_sec, "-9223372036854775808-01-01T00:00:00+00:01",
-                     utc, &tp));
-
-  // TODO: Add tests that parsing times with fractional seconds overflow
-  // appropriately. This can't be done until cctz::parse() properly detects
-  // overflow when combining the chrono seconds and femto.
-}
-
-//
-// Roundtrip test for format()/parse().
-//
-
-TEST(FormatParse, RoundTrip) {
-  time_zone lax;
-  EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax));
-  const auto in = convert(civil_second(1977, 6, 28, 9, 8, 7), lax);
-  const auto subseconds = chrono::nanoseconds(654321);
-
-  // RFC3339, which renders subseconds.
-  {
-    time_point<chrono::nanoseconds> out;
-    const std::string s = format(RFC3339_full, in + subseconds, lax);
-    EXPECT_TRUE(parse(RFC3339_full, s, lax, &out)) << s;
-    EXPECT_EQ(in + subseconds, out);  // RFC3339_full includes %Ez
-  }
-
-  // RFC1123, which only does whole seconds.
-  {
-    time_point<chrono::nanoseconds> out;
-    const std::string s = format(RFC1123_full, in, lax);
-    EXPECT_TRUE(parse(RFC1123_full, s, lax, &out)) << s;
-    EXPECT_EQ(in, out);  // RFC1123_full includes %z
-  }
-
-#if defined(_WIN32) || defined(_WIN64)
-  // Initial investigations indicate the %c does not roundtrip on Windows.
-  // TODO: Figure out what is going on here (perhaps a locale problem).
-#elif defined(__EMSCRIPTEN__)
-  // strftime() and strptime() use different defintions for "%c" under
-  // emscripten (see https://github.com/kripken/emscripten/pull/7491),
-  // causing its round-trip test to fail.
-#else
-  // Even though we don't know what %c will produce, it should roundtrip,
-  // but only in the 0-offset timezone.
-  {
-    time_point<chrono::nanoseconds> out;
-    time_zone utc = utc_time_zone();
-    const std::string s = format("%c", in, utc);
-    EXPECT_TRUE(parse("%c", s, utc, &out)) << s;
-    EXPECT_EQ(in, out);
-  }
-#endif
-}
-
-TEST(FormatParse, RoundTripDistantFuture) {
-  const time_zone utc = utc_time_zone();
-  const time_point<absl::time_internal::cctz::seconds> in =
-      time_point<absl::time_internal::cctz::seconds>::max();
-  const std::string s = format(RFC3339_full, in, utc);
-  time_point<absl::time_internal::cctz::seconds> out;
-  EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s;
-  EXPECT_EQ(in, out);
-}
-
-TEST(FormatParse, RoundTripDistantPast) {
-  const time_zone utc = utc_time_zone();
-  const time_point<absl::time_internal::cctz::seconds> in =
-      time_point<absl::time_internal::cctz::seconds>::min();
-  const std::string s = format(RFC3339_full, in, utc);
-  time_point<absl::time_internal::cctz::seconds> out;
-  EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s;
-  EXPECT_EQ(in, out);
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_if.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_if.cc
deleted file mode 100644
index 0319b2f..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_if.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "time_zone_if.h"
-
-#include "absl/base/config.h"
-#include "time_zone_info.h"
-#include "time_zone_libc.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-std::unique_ptr<TimeZoneIf> TimeZoneIf::Load(const std::string& name) {
-  // Support "libc:localtime" and "libc:*" to access the legacy
-  // localtime and UTC support respectively from the C library.
-  if (name.compare(0, 5, "libc:") == 0) {
-    return std::unique_ptr<TimeZoneIf>(new TimeZoneLibC(name.substr(5)));
-  }
-
-  // Otherwise use the "zoneinfo" implementation by default.
-  std::unique_ptr<TimeZoneInfo> tz(new TimeZoneInfo);
-  if (!tz->Load(name)) tz.reset();
-  return std::unique_ptr<TimeZoneIf>(tz.release());
-}
-
-// Defined out-of-line to avoid emitting a weak vtable in all TUs.
-TimeZoneIf::~TimeZoneIf() {}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_if.h b/third_party/abseil/absl/time/internal/cctz/src/time_zone_if.h
deleted file mode 100644
index 32c0891..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_if.h
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
-
-#include <chrono>
-#include <cstdint>
-#include <memory>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// A simple interface used to hide time-zone complexities from time_zone::Impl.
-// Subclasses implement the functions for civil-time conversions in the zone.
-class TimeZoneIf {
- public:
-  // A factory function for TimeZoneIf implementations.
-  static std::unique_ptr<TimeZoneIf> Load(const std::string& name);
-
-  virtual ~TimeZoneIf();
-
-  virtual time_zone::absolute_lookup BreakTime(
-      const time_point<seconds>& tp) const = 0;
-  virtual time_zone::civil_lookup MakeTime(const civil_second& cs) const = 0;
-
-  virtual bool NextTransition(const time_point<seconds>& tp,
-                              time_zone::civil_transition* trans) const = 0;
-  virtual bool PrevTransition(const time_point<seconds>& tp,
-                              time_zone::civil_transition* trans) const = 0;
-
-  virtual std::string Version() const = 0;
-  virtual std::string Description() const = 0;
-
- protected:
-  TimeZoneIf() {}
-};
-
-// Convert between time_point<seconds> and a count of seconds since the
-// Unix epoch.  We assume that the std::chrono::system_clock and the
-// Unix clock are second aligned, but not that they share an epoch.
-inline std::int_fast64_t ToUnixSeconds(const time_point<seconds>& tp) {
-  return (tp - std::chrono::time_point_cast<seconds>(
-                   std::chrono::system_clock::from_time_t(0)))
-      .count();
-}
-inline time_point<seconds> FromUnixSeconds(std::int_fast64_t t) {
-  return std::chrono::time_point_cast<seconds>(
-             std::chrono::system_clock::from_time_t(0)) +
-         seconds(t);
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_impl.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_impl.cc
deleted file mode 100644
index f34e3ae..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_impl.cc
+++ /dev/null
@@ -1,113 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "time_zone_impl.h"
-
-#include <deque>
-#include <memory>
-#include <mutex>
-#include <string>
-#include <unordered_map>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "time_zone_fixed.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-// time_zone::Impls are linked into a map to support fast lookup by name.
-using TimeZoneImplByName =
-    std::unordered_map<std::string, const time_zone::Impl*>;
-TimeZoneImplByName* time_zone_map = nullptr;
-
-// Mutual exclusion for time_zone_map.
-std::mutex& TimeZoneMutex() {
-  // This mutex is intentionally "leaked" to avoid the static deinitialization
-  // order fiasco (std::mutex's destructor is not trivial on many platforms).
-  static std::mutex* time_zone_mutex = new std::mutex;
-  return *time_zone_mutex;
-}
-
-}  // namespace
-
-time_zone time_zone::Impl::UTC() { return time_zone(UTCImpl()); }
-
-bool time_zone::Impl::LoadTimeZone(const std::string& name, time_zone* tz) {
-  const Impl* const utc_impl = UTCImpl();
-
-  // Check for UTC (which is never a key in time_zone_map).
-  auto offset = seconds::zero();
-  if (FixedOffsetFromName(name, &offset) && offset == seconds::zero()) {
-    *tz = time_zone(utc_impl);
-    return true;
-  }
-
-  // Check whether the time zone has already been loaded.
-  {
-    std::lock_guard<std::mutex> lock(TimeZoneMutex());
-    if (time_zone_map != nullptr) {
-      TimeZoneImplByName::const_iterator itr = time_zone_map->find(name);
-      if (itr != time_zone_map->end()) {
-        *tz = time_zone(itr->second);
-        return itr->second != utc_impl;
-      }
-    }
-  }
-
-  // Load the new time zone (outside the lock).
-  std::unique_ptr<const Impl> new_impl(new Impl(name));
-
-  // Add the new time zone to the map.
-  std::lock_guard<std::mutex> lock(TimeZoneMutex());
-  if (time_zone_map == nullptr) time_zone_map = new TimeZoneImplByName;
-  const Impl*& impl = (*time_zone_map)[name];
-  if (impl == nullptr) {  // this thread won any load race
-    impl = new_impl->zone_ ? new_impl.release() : utc_impl;
-  }
-  *tz = time_zone(impl);
-  return impl != utc_impl;
-}
-
-void time_zone::Impl::ClearTimeZoneMapTestOnly() {
-  std::lock_guard<std::mutex> lock(TimeZoneMutex());
-  if (time_zone_map != nullptr) {
-    // Existing time_zone::Impl* entries are in the wild, so we can't delete
-    // them. Instead, we move them to a private container, where they are
-    // logically unreachable but not "leaked".  Future requests will result
-    // in reloading the data.
-    static auto* cleared = new std::deque<const time_zone::Impl*>;
-    for (const auto& element : *time_zone_map) {
-      cleared->push_back(element.second);
-    }
-    time_zone_map->clear();
-  }
-}
-
-time_zone::Impl::Impl(const std::string& name)
-    : name_(name), zone_(TimeZoneIf::Load(name_)) {}
-
-const time_zone::Impl* time_zone::Impl::UTCImpl() {
-  static const Impl* utc_impl = new Impl("UTC");  // never fails
-  return utc_impl;
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_impl.h b/third_party/abseil/absl/time/internal/cctz/src/time_zone_impl.h
deleted file mode 100644
index 7d747ba..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_impl.h
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IMPL_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IMPL_H_
-
-#include <memory>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-#include "time_zone_if.h"
-#include "time_zone_info.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// time_zone::Impl is the internal object referenced by a cctz::time_zone.
-class time_zone::Impl {
- public:
-  // The UTC time zone. Also used for other time zones that fail to load.
-  static time_zone UTC();
-
-  // Load a named time zone. Returns false if the name is invalid, or if
-  // some other kind of error occurs. Note that loading "UTC" never fails.
-  static bool LoadTimeZone(const std::string& name, time_zone* tz);
-
-  // Clears the map of cached time zones.  Primarily for use in benchmarks
-  // that gauge the performance of loading/parsing the time-zone data.
-  static void ClearTimeZoneMapTestOnly();
-
-  // The primary key is the time-zone ID (e.g., "America/New_York").
-  const std::string& Name() const {
-    // TODO: It would nice if the zoneinfo data included the zone name.
-    return name_;
-  }
-
-  // Breaks a time_point down to civil-time components in this time zone.
-  time_zone::absolute_lookup BreakTime(const time_point<seconds>& tp) const {
-    return zone_->BreakTime(tp);
-  }
-
-  // Converts the civil-time components in this time zone into a time_point.
-  // That is, the opposite of BreakTime(). The requested civil time may be
-  // ambiguous or illegal due to a change of UTC offset.
-  time_zone::civil_lookup MakeTime(const civil_second& cs) const {
-    return zone_->MakeTime(cs);
-  }
-
-  // Finds the time of the next/previous offset change in this time zone.
-  bool NextTransition(const time_point<seconds>& tp,
-                      time_zone::civil_transition* trans) const {
-    return zone_->NextTransition(tp, trans);
-  }
-  bool PrevTransition(const time_point<seconds>& tp,
-                      time_zone::civil_transition* trans) const {
-    return zone_->PrevTransition(tp, trans);
-  }
-
-  // Returns an implementation-defined version string for this time zone.
-  std::string Version() const { return zone_->Version(); }
-
-  // Returns an implementation-defined description of this time zone.
-  std::string Description() const { return zone_->Description(); }
-
- private:
-  explicit Impl(const std::string& name);
-  static const Impl* UTCImpl();
-
-  const std::string name_;
-  std::unique_ptr<TimeZoneIf> zone_;
-};
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IMPL_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_info.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_info.cc
deleted file mode 100644
index 8039353..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_info.cc
+++ /dev/null
@@ -1,965 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-// This file implements the TimeZoneIf interface using the "zoneinfo"
-// data provided by the IANA Time Zone Database (i.e., the only real game
-// in town).
-//
-// TimeZoneInfo represents the history of UTC-offset changes within a time
-// zone. Most changes are due to daylight-saving rules, but occasionally
-// shifts are made to the time-zone's base offset. The database only attempts
-// to be definitive for times since 1970, so be wary of local-time conversions
-// before that. Also, rule and zone-boundary changes are made at the whim
-// of governments, so the conversion of future times needs to be taken with
-// a grain of salt.
-//
-// For more information see tzfile(5), http://www.iana.org/time-zones, or
-// https://en.wikipedia.org/wiki/Zoneinfo.
-//
-// Note that we assume the proleptic Gregorian calendar and 60-second
-// minutes throughout.
-
-#include "time_zone_info.h"
-
-#include <algorithm>
-#include <cassert>
-#include <chrono>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <functional>
-#include <memory>
-#include <sstream>
-#include <string>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "time_zone_fixed.h"
-#include "time_zone_posix.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-inline bool IsLeap(year_t year) {
-  return (year % 4) == 0 && ((year % 100) != 0 || (year % 400) == 0);
-}
-
-// The number of days in non-leap and leap years respectively.
-const std::int_least32_t kDaysPerYear[2] = {365, 366};
-
-// The day offsets of the beginning of each (1-based) month in non-leap and
-// leap years respectively (e.g., 335 days before December in a leap year).
-const std::int_least16_t kMonthOffsets[2][1 + 12 + 1] = {
-    {-1, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
-    {-1, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366},
-};
-
-// We reject leap-second encoded zoneinfo and so assume 60-second minutes.
-const std::int_least32_t kSecsPerDay = 24 * 60 * 60;
-
-// 400-year chunks always have 146097 days (20871 weeks).
-const std::int_least64_t kSecsPer400Years = 146097LL * kSecsPerDay;
-
-// Like kDaysPerYear[] but scaled up by a factor of kSecsPerDay.
-const std::int_least32_t kSecsPerYear[2] = {
-    365 * kSecsPerDay,
-    366 * kSecsPerDay,
-};
-
-// Convert a cctz::weekday to a POSIX TZ weekday number (0==Sun, ..., 6=Sat).
-inline int ToPosixWeekday(weekday wd) {
-  switch (wd) {
-    case weekday::sunday:
-      return 0;
-    case weekday::monday:
-      return 1;
-    case weekday::tuesday:
-      return 2;
-    case weekday::wednesday:
-      return 3;
-    case weekday::thursday:
-      return 4;
-    case weekday::friday:
-      return 5;
-    case weekday::saturday:
-      return 6;
-  }
-  return 0; /*NOTREACHED*/
-}
-
-// Single-byte, unsigned numeric values are encoded directly.
-inline std::uint_fast8_t Decode8(const char* cp) {
-  return static_cast<std::uint_fast8_t>(*cp) & 0xff;
-}
-
-// Multi-byte, numeric values are encoded using a MSB first,
-// twos-complement representation. These helpers decode, from
-// the given address, 4-byte and 8-byte values respectively.
-// Note: If int_fastXX_t == intXX_t and this machine is not
-// twos complement, then there will be at least one input value
-// we cannot represent.
-std::int_fast32_t Decode32(const char* cp) {
-  std::uint_fast32_t v = 0;
-  for (int i = 0; i != (32 / 8); ++i) v = (v << 8) | Decode8(cp++);
-  const std::int_fast32_t s32max = 0x7fffffff;
-  const auto s32maxU = static_cast<std::uint_fast32_t>(s32max);
-  if (v <= s32maxU) return static_cast<std::int_fast32_t>(v);
-  return static_cast<std::int_fast32_t>(v - s32maxU - 1) - s32max - 1;
-}
-
-std::int_fast64_t Decode64(const char* cp) {
-  std::uint_fast64_t v = 0;
-  for (int i = 0; i != (64 / 8); ++i) v = (v << 8) | Decode8(cp++);
-  const std::int_fast64_t s64max = 0x7fffffffffffffff;
-  const auto s64maxU = static_cast<std::uint_fast64_t>(s64max);
-  if (v <= s64maxU) return static_cast<std::int_fast64_t>(v);
-  return static_cast<std::int_fast64_t>(v - s64maxU - 1) - s64max - 1;
-}
-
-// Generate a year-relative offset for a PosixTransition.
-std::int_fast64_t TransOffset(bool leap_year, int jan1_weekday,
-                              const PosixTransition& pt) {
-  std::int_fast64_t days = 0;
-  switch (pt.date.fmt) {
-    case PosixTransition::J: {
-      days = pt.date.j.day;
-      if (!leap_year || days < kMonthOffsets[1][3]) days -= 1;
-      break;
-    }
-    case PosixTransition::N: {
-      days = pt.date.n.day;
-      break;
-    }
-    case PosixTransition::M: {
-      const bool last_week = (pt.date.m.week == 5);
-      days = kMonthOffsets[leap_year][pt.date.m.month + last_week];
-      const std::int_fast64_t weekday = (jan1_weekday + days) % 7;
-      if (last_week) {
-        days -= (weekday + 7 - 1 - pt.date.m.weekday) % 7 + 1;
-      } else {
-        days += (pt.date.m.weekday + 7 - weekday) % 7;
-        days += (pt.date.m.week - 1) * 7;
-      }
-      break;
-    }
-  }
-  return (days * kSecsPerDay) + pt.time.offset;
-}
-
-inline time_zone::civil_lookup MakeUnique(const time_point<seconds>& tp) {
-  time_zone::civil_lookup cl;
-  cl.kind = time_zone::civil_lookup::UNIQUE;
-  cl.pre = cl.trans = cl.post = tp;
-  return cl;
-}
-
-inline time_zone::civil_lookup MakeUnique(std::int_fast64_t unix_time) {
-  return MakeUnique(FromUnixSeconds(unix_time));
-}
-
-inline time_zone::civil_lookup MakeSkipped(const Transition& tr,
-                                           const civil_second& cs) {
-  time_zone::civil_lookup cl;
-  cl.kind = time_zone::civil_lookup::SKIPPED;
-  cl.pre = FromUnixSeconds(tr.unix_time - 1 + (cs - tr.prev_civil_sec));
-  cl.trans = FromUnixSeconds(tr.unix_time);
-  cl.post = FromUnixSeconds(tr.unix_time - (tr.civil_sec - cs));
-  return cl;
-}
-
-inline time_zone::civil_lookup MakeRepeated(const Transition& tr,
-                                            const civil_second& cs) {
-  time_zone::civil_lookup cl;
-  cl.kind = time_zone::civil_lookup::REPEATED;
-  cl.pre = FromUnixSeconds(tr.unix_time - 1 - (tr.prev_civil_sec - cs));
-  cl.trans = FromUnixSeconds(tr.unix_time);
-  cl.post = FromUnixSeconds(tr.unix_time + (cs - tr.civil_sec));
-  return cl;
-}
-
-inline civil_second YearShift(const civil_second& cs, year_t shift) {
-  return civil_second(cs.year() + shift, cs.month(), cs.day(), cs.hour(),
-                      cs.minute(), cs.second());
-}
-
-}  // namespace
-
-// What (no leap-seconds) UTC+seconds zoneinfo would look like.
-bool TimeZoneInfo::ResetToBuiltinUTC(const seconds& offset) {
-  transition_types_.resize(1);
-  TransitionType& tt(transition_types_.back());
-  tt.utc_offset = static_cast<std::int_least32_t>(offset.count());
-  tt.is_dst = false;
-  tt.abbr_index = 0;
-
-  // We temporarily add some redundant, contemporary (2015 through 2025)
-  // transitions for performance reasons.  See TimeZoneInfo::LocalTime().
-  // TODO: Fix the performance issue and remove the extra transitions.
-  transitions_.clear();
-  transitions_.reserve(12);
-  for (const std::int_fast64_t unix_time : {
-           -(1LL << 59),  // a "first half" transition
-           1420070400LL,  // 2015-01-01T00:00:00+00:00
-           1451606400LL,  // 2016-01-01T00:00:00+00:00
-           1483228800LL,  // 2017-01-01T00:00:00+00:00
-           1514764800LL,  // 2018-01-01T00:00:00+00:00
-           1546300800LL,  // 2019-01-01T00:00:00+00:00
-           1577836800LL,  // 2020-01-01T00:00:00+00:00
-           1609459200LL,  // 2021-01-01T00:00:00+00:00
-           1640995200LL,  // 2022-01-01T00:00:00+00:00
-           1672531200LL,  // 2023-01-01T00:00:00+00:00
-           1704067200LL,  // 2024-01-01T00:00:00+00:00
-           1735689600LL,  // 2025-01-01T00:00:00+00:00
-       }) {
-    Transition& tr(*transitions_.emplace(transitions_.end()));
-    tr.unix_time = unix_time;
-    tr.type_index = 0;
-    tr.civil_sec = LocalTime(tr.unix_time, tt).cs;
-    tr.prev_civil_sec = tr.civil_sec - 1;
-  }
-
-  default_transition_type_ = 0;
-  abbreviations_ = FixedOffsetToAbbr(offset);
-  abbreviations_.append(1, '\0');
-  future_spec_.clear();  // never needed for a fixed-offset zone
-  extended_ = false;
-
-  tt.civil_max = LocalTime(seconds::max().count(), tt).cs;
-  tt.civil_min = LocalTime(seconds::min().count(), tt).cs;
-
-  transitions_.shrink_to_fit();
-  return true;
-}
-
-// Builds the in-memory header using the raw bytes from the file.
-bool TimeZoneInfo::Header::Build(const tzhead& tzh) {
-  std::int_fast32_t v;
-  if ((v = Decode32(tzh.tzh_timecnt)) < 0) return false;
-  timecnt = static_cast<std::size_t>(v);
-  if ((v = Decode32(tzh.tzh_typecnt)) < 0) return false;
-  typecnt = static_cast<std::size_t>(v);
-  if ((v = Decode32(tzh.tzh_charcnt)) < 0) return false;
-  charcnt = static_cast<std::size_t>(v);
-  if ((v = Decode32(tzh.tzh_leapcnt)) < 0) return false;
-  leapcnt = static_cast<std::size_t>(v);
-  if ((v = Decode32(tzh.tzh_ttisstdcnt)) < 0) return false;
-  ttisstdcnt = static_cast<std::size_t>(v);
-  if ((v = Decode32(tzh.tzh_ttisutcnt)) < 0) return false;
-  ttisutcnt = static_cast<std::size_t>(v);
-  return true;
-}
-
-// How many bytes of data are associated with this header. The result
-// depends upon whether this is a section with 4-byte or 8-byte times.
-std::size_t TimeZoneInfo::Header::DataLength(std::size_t time_len) const {
-  std::size_t len = 0;
-  len += (time_len + 1) * timecnt;  // unix_time + type_index
-  len += (4 + 1 + 1) * typecnt;     // utc_offset + is_dst + abbr_index
-  len += 1 * charcnt;               // abbreviations
-  len += (time_len + 4) * leapcnt;  // leap-time + TAI-UTC
-  len += 1 * ttisstdcnt;            // UTC/local indicators
-  len += 1 * ttisutcnt;             // standard/wall indicators
-  return len;
-}
-
-// zic(8) can generate no-op transitions when a zone changes rules at an
-// instant when there is actually no discontinuity.  So we check whether
-// two transitions have equivalent types (same offset/is_dst/abbr).
-bool TimeZoneInfo::EquivTransitions(std::uint_fast8_t tt1_index,
-                                    std::uint_fast8_t tt2_index) const {
-  if (tt1_index == tt2_index) return true;
-  const TransitionType& tt1(transition_types_[tt1_index]);
-  const TransitionType& tt2(transition_types_[tt2_index]);
-  if (tt1.utc_offset != tt2.utc_offset) return false;
-  if (tt1.is_dst != tt2.is_dst) return false;
-  if (tt1.abbr_index != tt2.abbr_index) return false;
-  return true;
-}
-
-// Find/make a transition type with these attributes.
-bool TimeZoneInfo::GetTransitionType(std::int_fast32_t utc_offset, bool is_dst,
-                                     const std::string& abbr,
-                                     std::uint_least8_t* index) {
-  std::size_t type_index = 0;
-  std::size_t abbr_index = abbreviations_.size();
-  for (; type_index != transition_types_.size(); ++type_index) {
-    const TransitionType& tt(transition_types_[type_index]);
-    const char* tt_abbr = &abbreviations_[tt.abbr_index];
-    if (tt_abbr == abbr) abbr_index = tt.abbr_index;
-    if (tt.utc_offset == utc_offset && tt.is_dst == is_dst) {
-      if (abbr_index == tt.abbr_index) break;  // reuse
-    }
-  }
-  if (type_index > 255 || abbr_index > 255) {
-    // No index space (8 bits) available for a new type or abbreviation.
-    return false;
-  }
-  if (type_index == transition_types_.size()) {
-    TransitionType& tt(*transition_types_.emplace(transition_types_.end()));
-    tt.utc_offset = static_cast<std::int_least32_t>(utc_offset);
-    tt.is_dst = is_dst;
-    if (abbr_index == abbreviations_.size()) {
-      abbreviations_.append(abbr);
-      abbreviations_.append(1, '\0');
-    }
-    tt.abbr_index = static_cast<std::uint_least8_t>(abbr_index);
-  }
-  *index = static_cast<std::uint_least8_t>(type_index);
-  return true;
-}
-
-// Use the POSIX-TZ-environment-variable-style string to handle times
-// in years after the last transition stored in the zoneinfo data.
-bool TimeZoneInfo::ExtendTransitions() {
-  extended_ = false;
-  if (future_spec_.empty()) return true;  // last transition prevails
-
-  PosixTimeZone posix;
-  if (!ParsePosixSpec(future_spec_, &posix)) return false;
-
-  // Find transition type for the future std specification.
-  std::uint_least8_t std_ti;
-  if (!GetTransitionType(posix.std_offset, false, posix.std_abbr, &std_ti))
-    return false;
-
-  if (posix.dst_abbr.empty()) {  // std only
-    // The future specification should match the last transition, and
-    // that means that handling the future will fall out naturally.
-    return EquivTransitions(transitions_.back().type_index, std_ti);
-  }
-
-  // Find transition type for the future dst specification.
-  std::uint_least8_t dst_ti;
-  if (!GetTransitionType(posix.dst_offset, true, posix.dst_abbr, &dst_ti))
-    return false;
-
-  // Extend the transitions for an additional 400 years using the
-  // future specification. Years beyond those can be handled by
-  // mapping back to a cycle-equivalent year within that range.
-  // We may need two additional transitions for the current year.
-  transitions_.reserve(transitions_.size() + 400 * 2 + 2);
-  extended_ = true;
-
-  const Transition& last(transitions_.back());
-  const std::int_fast64_t last_time = last.unix_time;
-  const TransitionType& last_tt(transition_types_[last.type_index]);
-  last_year_ = LocalTime(last_time, last_tt).cs.year();
-  bool leap_year = IsLeap(last_year_);
-  const civil_second jan1(last_year_);
-  std::int_fast64_t jan1_time = jan1 - civil_second();
-  int jan1_weekday = ToPosixWeekday(get_weekday(jan1));
-
-  Transition dst = {0, dst_ti, civil_second(), civil_second()};
-  Transition std = {0, std_ti, civil_second(), civil_second()};
-  for (const year_t limit = last_year_ + 400;; ++last_year_) {
-    auto dst_trans_off = TransOffset(leap_year, jan1_weekday, posix.dst_start);
-    auto std_trans_off = TransOffset(leap_year, jan1_weekday, posix.dst_end);
-    dst.unix_time = jan1_time + dst_trans_off - posix.std_offset;
-    std.unix_time = jan1_time + std_trans_off - posix.dst_offset;
-    const auto* ta = dst.unix_time < std.unix_time ? &dst : &std;
-    const auto* tb = dst.unix_time < std.unix_time ? &std : &dst;
-    if (last_time < tb->unix_time) {
-      if (last_time < ta->unix_time) transitions_.push_back(*ta);
-      transitions_.push_back(*tb);
-    }
-    if (last_year_ == limit) break;
-    jan1_time += kSecsPerYear[leap_year];
-    jan1_weekday = (jan1_weekday + kDaysPerYear[leap_year]) % 7;
-    leap_year = !leap_year && IsLeap(last_year_ + 1);
-  }
-
-  return true;
-}
-
-bool TimeZoneInfo::Load(ZoneInfoSource* zip) {
-  // Read and validate the header.
-  tzhead tzh;
-  if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) return false;
-  if (strncmp(tzh.tzh_magic, TZ_MAGIC, sizeof(tzh.tzh_magic)) != 0)
-    return false;
-  Header hdr;
-  if (!hdr.Build(tzh)) return false;
-  std::size_t time_len = 4;
-  if (tzh.tzh_version[0] != '\0') {
-    // Skip the 4-byte data.
-    if (zip->Skip(hdr.DataLength(time_len)) != 0) return false;
-    // Read and validate the header for the 8-byte data.
-    if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) return false;
-    if (strncmp(tzh.tzh_magic, TZ_MAGIC, sizeof(tzh.tzh_magic)) != 0)
-      return false;
-    if (tzh.tzh_version[0] == '\0') return false;
-    if (!hdr.Build(tzh)) return false;
-    time_len = 8;
-  }
-  if (hdr.typecnt == 0) return false;
-  if (hdr.leapcnt != 0) {
-    // This code assumes 60-second minutes so we do not want
-    // the leap-second encoded zoneinfo. We could reverse the
-    // compensation, but the "right" encoding is rarely used
-    // so currently we simply reject such data.
-    return false;
-  }
-  if (hdr.ttisstdcnt != 0 && hdr.ttisstdcnt != hdr.typecnt) return false;
-  if (hdr.ttisutcnt != 0 && hdr.ttisutcnt != hdr.typecnt) return false;
-
-  // Read the data into a local buffer.
-  std::size_t len = hdr.DataLength(time_len);
-  std::vector<char> tbuf(len);
-  if (zip->Read(tbuf.data(), len) != len) return false;
-  const char* bp = tbuf.data();
-
-  // Decode and validate the transitions.
-  transitions_.reserve(hdr.timecnt + 2);
-  transitions_.resize(hdr.timecnt);
-  for (std::size_t i = 0; i != hdr.timecnt; ++i) {
-    transitions_[i].unix_time = (time_len == 4) ? Decode32(bp) : Decode64(bp);
-    bp += time_len;
-    if (i != 0) {
-      // Check that the transitions are ordered by time (as zic guarantees).
-      if (!Transition::ByUnixTime()(transitions_[i - 1], transitions_[i]))
-        return false;  // out of order
-    }
-  }
-  bool seen_type_0 = false;
-  for (std::size_t i = 0; i != hdr.timecnt; ++i) {
-    transitions_[i].type_index = Decode8(bp++);
-    if (transitions_[i].type_index >= hdr.typecnt) return false;
-    if (transitions_[i].type_index == 0) seen_type_0 = true;
-  }
-
-  // Decode and validate the transition types.
-  transition_types_.reserve(hdr.typecnt + 2);
-  transition_types_.resize(hdr.typecnt);
-  for (std::size_t i = 0; i != hdr.typecnt; ++i) {
-    transition_types_[i].utc_offset =
-        static_cast<std::int_least32_t>(Decode32(bp));
-    if (transition_types_[i].utc_offset >= kSecsPerDay ||
-        transition_types_[i].utc_offset <= -kSecsPerDay)
-      return false;
-    bp += 4;
-    transition_types_[i].is_dst = (Decode8(bp++) != 0);
-    transition_types_[i].abbr_index = Decode8(bp++);
-    if (transition_types_[i].abbr_index >= hdr.charcnt) return false;
-  }
-
-  // Determine the before-first-transition type.
-  default_transition_type_ = 0;
-  if (seen_type_0 && hdr.timecnt != 0) {
-    std::uint_fast8_t index = 0;
-    if (transition_types_[0].is_dst) {
-      index = transitions_[0].type_index;
-      while (index != 0 && transition_types_[index].is_dst) --index;
-    }
-    while (index != hdr.typecnt && transition_types_[index].is_dst) ++index;
-    if (index != hdr.typecnt) default_transition_type_ = index;
-  }
-
-  // Copy all the abbreviations.
-  abbreviations_.reserve(hdr.charcnt + 10);
-  abbreviations_.assign(bp, hdr.charcnt);
-  bp += hdr.charcnt;
-
-  // Skip the unused portions. We've already dispensed with leap-second
-  // encoded zoneinfo. The ttisstd/ttisgmt indicators only apply when
-  // interpreting a POSIX spec that does not include start/end rules, and
-  // that isn't the case here (see "zic -p").
-  bp += (8 + 4) * hdr.leapcnt;  // leap-time + TAI-UTC
-  bp += 1 * hdr.ttisstdcnt;     // UTC/local indicators
-  bp += 1 * hdr.ttisutcnt;      // standard/wall indicators
-  assert(bp == tbuf.data() + tbuf.size());
-
-  future_spec_.clear();
-  if (tzh.tzh_version[0] != '\0') {
-    // Snarf up the NL-enclosed future POSIX spec. Note
-    // that version '3' files utilize an extended format.
-    auto get_char = [](ZoneInfoSource* azip) -> int {
-      unsigned char ch;  // all non-EOF results are positive
-      return (azip->Read(&ch, 1) == 1) ? ch : EOF;
-    };
-    if (get_char(zip) != '\n') return false;
-    for (int c = get_char(zip); c != '\n'; c = get_char(zip)) {
-      if (c == EOF) return false;
-      future_spec_.push_back(static_cast<char>(c));
-    }
-  }
-
-  // We don't check for EOF so that we're forwards compatible.
-
-  // If we did not find version information during the standard loading
-  // process (as of tzh_version '3' that is unsupported), then ask the
-  // ZoneInfoSource for any out-of-bound version string it may be privy to.
-  if (version_.empty()) {
-    version_ = zip->Version();
-  }
-
-  // Trim redundant transitions. zic may have added these to work around
-  // differences between the glibc and reference implementations (see
-  // zic.c:dontmerge) and the Qt library (see zic.c:WORK_AROUND_QTBUG_53071).
-  // For us, they just get in the way when we do future_spec_ extension.
-  while (hdr.timecnt > 1) {
-    if (!EquivTransitions(transitions_[hdr.timecnt - 1].type_index,
-                          transitions_[hdr.timecnt - 2].type_index)) {
-      break;
-    }
-    hdr.timecnt -= 1;
-  }
-  transitions_.resize(hdr.timecnt);
-
-  // Ensure that there is always a transition in the first half of the
-  // time line (the second half is handled below) so that the signed
-  // difference between a civil_second and the civil_second of its
-  // previous transition is always representable, without overflow.
-  if (transitions_.empty() || transitions_.front().unix_time >= 0) {
-    Transition& tr(*transitions_.emplace(transitions_.begin()));
-    tr.unix_time = -(1LL << 59);  // -18267312070-10-26T17:01:52+00:00
-    tr.type_index = default_transition_type_;
-  }
-
-  // Extend the transitions using the future specification.
-  if (!ExtendTransitions()) return false;
-
-  // Ensure that there is always a transition in the second half of the
-  // time line (the first half is handled above) so that the signed
-  // difference between a civil_second and the civil_second of its
-  // previous transition is always representable, without overflow.
-  const Transition& last(transitions_.back());
-  if (last.unix_time < 0) {
-    const std::uint_fast8_t type_index = last.type_index;
-    Transition& tr(*transitions_.emplace(transitions_.end()));
-    tr.unix_time = 2147483647;  // 2038-01-19T03:14:07+00:00
-    tr.type_index = type_index;
-  }
-
-  // Compute the local civil time for each transition and the preceding
-  // second. These will be used for reverse conversions in MakeTime().
-  const TransitionType* ttp = &transition_types_[default_transition_type_];
-  for (std::size_t i = 0; i != transitions_.size(); ++i) {
-    Transition& tr(transitions_[i]);
-    tr.prev_civil_sec = LocalTime(tr.unix_time, *ttp).cs - 1;
-    ttp = &transition_types_[tr.type_index];
-    tr.civil_sec = LocalTime(tr.unix_time, *ttp).cs;
-    if (i != 0) {
-      // Check that the transitions are ordered by civil time. Essentially
-      // this means that an offset change cannot cross another such change.
-      // No one does this in practice, and we depend on it in MakeTime().
-      if (!Transition::ByCivilTime()(transitions_[i - 1], tr))
-        return false;  // out of order
-    }
-  }
-
-  // Compute the maximum/minimum civil times that can be converted to a
-  // time_point<seconds> for each of the zone's transition types.
-  for (auto& tt : transition_types_) {
-    tt.civil_max = LocalTime(seconds::max().count(), tt).cs;
-    tt.civil_min = LocalTime(seconds::min().count(), tt).cs;
-  }
-
-  transitions_.shrink_to_fit();
-  return true;
-}
-
-namespace {
-
-// fopen(3) adaptor.
-inline FILE* FOpen(const char* path, const char* mode) {
-#if defined(_MSC_VER)
-  FILE* fp;
-  if (fopen_s(&fp, path, mode) != 0) fp = nullptr;
-  return fp;
-#else
-  return fopen(path, mode);  // TODO: Enable the close-on-exec flag.
-#endif
-}
-
-// A stdio(3)-backed implementation of ZoneInfoSource.
-class FileZoneInfoSource : public ZoneInfoSource {
- public:
-  static std::unique_ptr<ZoneInfoSource> Open(const std::string& name);
-
-  std::size_t Read(void* ptr, std::size_t size) override {
-    size = std::min(size, len_);
-    std::size_t nread = fread(ptr, 1, size, fp_.get());
-    len_ -= nread;
-    return nread;
-  }
-  int Skip(std::size_t offset) override {
-    offset = std::min(offset, len_);
-    int rc = fseek(fp_.get(), static_cast<long>(offset), SEEK_CUR);
-    if (rc == 0) len_ -= offset;
-    return rc;
-  }
-  std::string Version() const override {
-    // TODO: It would nice if the zoneinfo data included the tzdb version.
-    return std::string();
-  }
-
- protected:
-  explicit FileZoneInfoSource(
-      FILE* fp, std::size_t len = std::numeric_limits<std::size_t>::max())
-      : fp_(fp, fclose), len_(len) {}
-
- private:
-  std::unique_ptr<FILE, int (*)(FILE*)> fp_;
-  std::size_t len_;
-};
-
-std::unique_ptr<ZoneInfoSource> FileZoneInfoSource::Open(
-    const std::string& name) {
-  // Use of the "file:" prefix is intended for testing purposes only.
-  const std::size_t pos = (name.compare(0, 5, "file:") == 0) ? 5 : 0;
-
-  // Map the time-zone name to a path name.
-  std::string path;
-  if (pos == name.size() || name[pos] != '/') {
-    const char* tzdir = "/usr/share/zoneinfo";
-    char* tzdir_env = nullptr;
-#if defined(_MSC_VER)
-    _dupenv_s(&tzdir_env, nullptr, "TZDIR");
-#else
-    tzdir_env = std::getenv("TZDIR");
-#endif
-    if (tzdir_env && *tzdir_env) tzdir = tzdir_env;
-    path += tzdir;
-    path += '/';
-#if defined(_MSC_VER)
-    free(tzdir_env);
-#endif
-  }
-  path.append(name, pos, std::string::npos);
-
-  // Open the zoneinfo file.
-  FILE* fp = FOpen(path.c_str(), "rb");
-  if (fp == nullptr) return nullptr;
-  std::size_t length = 0;
-  if (fseek(fp, 0, SEEK_END) == 0) {
-    long offset = ftell(fp);
-    if (offset >= 0) {
-      length = static_cast<std::size_t>(offset);
-    }
-    rewind(fp);
-  }
-  return std::unique_ptr<ZoneInfoSource>(new FileZoneInfoSource(fp, length));
-}
-
-class AndroidZoneInfoSource : public FileZoneInfoSource {
- public:
-  static std::unique_ptr<ZoneInfoSource> Open(const std::string& name);
-  std::string Version() const override { return version_; }
-
- private:
-  explicit AndroidZoneInfoSource(FILE* fp, std::size_t len, const char* vers)
-      : FileZoneInfoSource(fp, len), version_(vers) {}
-  std::string version_;
-};
-
-std::unique_ptr<ZoneInfoSource> AndroidZoneInfoSource::Open(
-    const std::string& name) {
-  // Use of the "file:" prefix is intended for testing purposes only.
-  const std::size_t pos = (name.compare(0, 5, "file:") == 0) ? 5 : 0;
-
-  // See Android's libc/tzcode/bionic.cpp for additional information.
-  for (const char* tzdata : {"/data/misc/zoneinfo/current/tzdata",
-                             "/system/usr/share/zoneinfo/tzdata"}) {
-    std::unique_ptr<FILE, int (*)(FILE*)> fp(FOpen(tzdata, "rb"), fclose);
-    if (fp.get() == nullptr) continue;
-
-    char hbuf[24];  // covers header.zonetab_offset too
-    if (fread(hbuf, 1, sizeof(hbuf), fp.get()) != sizeof(hbuf)) continue;
-    if (strncmp(hbuf, "tzdata", 6) != 0) continue;
-    const char* vers = (hbuf[11] == '\0') ? hbuf + 6 : "";
-    const std::int_fast32_t index_offset = Decode32(hbuf + 12);
-    const std::int_fast32_t data_offset = Decode32(hbuf + 16);
-    if (index_offset < 0 || data_offset < index_offset) continue;
-    if (fseek(fp.get(), static_cast<long>(index_offset), SEEK_SET) != 0)
-      continue;
-
-    char ebuf[52];  // covers entry.unused too
-    const std::size_t index_size =
-        static_cast<std::size_t>(data_offset - index_offset);
-    const std::size_t zonecnt = index_size / sizeof(ebuf);
-    if (zonecnt * sizeof(ebuf) != index_size) continue;
-    for (std::size_t i = 0; i != zonecnt; ++i) {
-      if (fread(ebuf, 1, sizeof(ebuf), fp.get()) != sizeof(ebuf)) break;
-      const std::int_fast32_t start = data_offset + Decode32(ebuf + 40);
-      const std::int_fast32_t length = Decode32(ebuf + 44);
-      if (start < 0 || length < 0) break;
-      ebuf[40] = '\0';  // ensure zone name is NUL terminated
-      if (strcmp(name.c_str() + pos, ebuf) == 0) {
-        if (fseek(fp.get(), static_cast<long>(start), SEEK_SET) != 0) break;
-        return std::unique_ptr<ZoneInfoSource>(new AndroidZoneInfoSource(
-            fp.release(), static_cast<std::size_t>(length), vers));
-      }
-    }
-  }
-
-  return nullptr;
-}
-
-}  // namespace
-
-bool TimeZoneInfo::Load(const std::string& name) {
-  // We can ensure that the loading of UTC or any other fixed-offset
-  // zone never fails because the simple, fixed-offset state can be
-  // internally generated. Note that this depends on our choice to not
-  // accept leap-second encoded ("right") zoneinfo.
-  auto offset = seconds::zero();
-  if (FixedOffsetFromName(name, &offset)) {
-    return ResetToBuiltinUTC(offset);
-  }
-
-  // Find and use a ZoneInfoSource to load the named zone.
-  auto zip = cctz_extension::zone_info_source_factory(
-      name, [](const std::string& n) -> std::unique_ptr<ZoneInfoSource> {
-        if (auto z = FileZoneInfoSource::Open(n)) return z;
-        if (auto z = AndroidZoneInfoSource::Open(n)) return z;
-        return nullptr;
-      });
-  return zip != nullptr && Load(zip.get());
-}
-
-// BreakTime() translation for a particular transition type.
-time_zone::absolute_lookup TimeZoneInfo::LocalTime(
-    std::int_fast64_t unix_time, const TransitionType& tt) const {
-  // A civil time in "+offset" looks like (time+offset) in UTC.
-  // Note: We perform two additions in the civil_second domain to
-  // sidestep the chance of overflow in (unix_time + tt.utc_offset).
-  return {(civil_second() + unix_time) + tt.utc_offset, tt.utc_offset,
-          tt.is_dst, &abbreviations_[tt.abbr_index]};
-}
-
-// BreakTime() translation for a particular transition.
-time_zone::absolute_lookup TimeZoneInfo::LocalTime(std::int_fast64_t unix_time,
-                                                   const Transition& tr) const {
-  const TransitionType& tt = transition_types_[tr.type_index];
-  // Note: (unix_time - tr.unix_time) will never overflow as we
-  // have ensured that there is always a "nearby" transition.
-  return {tr.civil_sec + (unix_time - tr.unix_time),  // TODO: Optimize.
-          tt.utc_offset, tt.is_dst, &abbreviations_[tt.abbr_index]};
-}
-
-// MakeTime() translation with a conversion-preserving +N * 400-year shift.
-time_zone::civil_lookup TimeZoneInfo::TimeLocal(const civil_second& cs,
-                                                year_t c4_shift) const {
-  assert(last_year_ - 400 < cs.year() && cs.year() <= last_year_);
-  time_zone::civil_lookup cl = MakeTime(cs);
-  if (c4_shift > seconds::max().count() / kSecsPer400Years) {
-    cl.pre = cl.trans = cl.post = time_point<seconds>::max();
-  } else {
-    const auto offset = seconds(c4_shift * kSecsPer400Years);
-    const auto limit = time_point<seconds>::max() - offset;
-    for (auto* tp : {&cl.pre, &cl.trans, &cl.post}) {
-      if (*tp > limit) {
-        *tp = time_point<seconds>::max();
-      } else {
-        *tp += offset;
-      }
-    }
-  }
-  return cl;
-}
-
-time_zone::absolute_lookup TimeZoneInfo::BreakTime(
-    const time_point<seconds>& tp) const {
-  std::int_fast64_t unix_time = ToUnixSeconds(tp);
-  const std::size_t timecnt = transitions_.size();
-  assert(timecnt != 0);  // We always add a transition.
-
-  if (unix_time < transitions_[0].unix_time) {
-    return LocalTime(unix_time, transition_types_[default_transition_type_]);
-  }
-  if (unix_time >= transitions_[timecnt - 1].unix_time) {
-    // After the last transition. If we extended the transitions using
-    // future_spec_, shift back to a supported year using the 400-year
-    // cycle of calendaric equivalence and then compensate accordingly.
-    if (extended_) {
-      const std::int_fast64_t diff =
-          unix_time - transitions_[timecnt - 1].unix_time;
-      const year_t shift = diff / kSecsPer400Years + 1;
-      const auto d = seconds(shift * kSecsPer400Years);
-      time_zone::absolute_lookup al = BreakTime(tp - d);
-      al.cs = YearShift(al.cs, shift * 400);
-      return al;
-    }
-    return LocalTime(unix_time, transitions_[timecnt - 1]);
-  }
-
-  const std::size_t hint = local_time_hint_.load(std::memory_order_relaxed);
-  if (0 < hint && hint < timecnt) {
-    if (transitions_[hint - 1].unix_time <= unix_time) {
-      if (unix_time < transitions_[hint].unix_time) {
-        return LocalTime(unix_time, transitions_[hint - 1]);
-      }
-    }
-  }
-
-  const Transition target = {unix_time, 0, civil_second(), civil_second()};
-  const Transition* begin = &transitions_[0];
-  const Transition* tr = std::upper_bound(begin, begin + timecnt, target,
-                                          Transition::ByUnixTime());
-  local_time_hint_.store(static_cast<std::size_t>(tr - begin),
-                         std::memory_order_relaxed);
-  return LocalTime(unix_time, *--tr);
-}
-
-time_zone::civil_lookup TimeZoneInfo::MakeTime(const civil_second& cs) const {
-  const std::size_t timecnt = transitions_.size();
-  assert(timecnt != 0);  // We always add a transition.
-
-  // Find the first transition after our target civil time.
-  const Transition* tr = nullptr;
-  const Transition* begin = &transitions_[0];
-  const Transition* end = begin + timecnt;
-  if (cs < begin->civil_sec) {
-    tr = begin;
-  } else if (cs >= transitions_[timecnt - 1].civil_sec) {
-    tr = end;
-  } else {
-    const std::size_t hint = time_local_hint_.load(std::memory_order_relaxed);
-    if (0 < hint && hint < timecnt) {
-      if (transitions_[hint - 1].civil_sec <= cs) {
-        if (cs < transitions_[hint].civil_sec) {
-          tr = begin + hint;
-        }
-      }
-    }
-    if (tr == nullptr) {
-      const Transition target = {0, 0, cs, civil_second()};
-      tr = std::upper_bound(begin, end, target, Transition::ByCivilTime());
-      time_local_hint_.store(static_cast<std::size_t>(tr - begin),
-                             std::memory_order_relaxed);
-    }
-  }
-
-  if (tr == begin) {
-    if (tr->prev_civil_sec >= cs) {
-      // Before first transition, so use the default offset.
-      const TransitionType& tt(transition_types_[default_transition_type_]);
-      if (cs < tt.civil_min) return MakeUnique(time_point<seconds>::min());
-      return MakeUnique(cs - (civil_second() + tt.utc_offset));
-    }
-    // tr->prev_civil_sec < cs < tr->civil_sec
-    return MakeSkipped(*tr, cs);
-  }
-
-  if (tr == end) {
-    if (cs > (--tr)->prev_civil_sec) {
-      // After the last transition. If we extended the transitions using
-      // future_spec_, shift back to a supported year using the 400-year
-      // cycle of calendaric equivalence and then compensate accordingly.
-      if (extended_ && cs.year() > last_year_) {
-        const year_t shift = (cs.year() - last_year_ - 1) / 400 + 1;
-        return TimeLocal(YearShift(cs, shift * -400), shift);
-      }
-      const TransitionType& tt(transition_types_[tr->type_index]);
-      if (cs > tt.civil_max) return MakeUnique(time_point<seconds>::max());
-      return MakeUnique(tr->unix_time + (cs - tr->civil_sec));
-    }
-    // tr->civil_sec <= cs <= tr->prev_civil_sec
-    return MakeRepeated(*tr, cs);
-  }
-
-  if (tr->prev_civil_sec < cs) {
-    // tr->prev_civil_sec < cs < tr->civil_sec
-    return MakeSkipped(*tr, cs);
-  }
-
-  if (cs <= (--tr)->prev_civil_sec) {
-    // tr->civil_sec <= cs <= tr->prev_civil_sec
-    return MakeRepeated(*tr, cs);
-  }
-
-  // In between transitions.
-  return MakeUnique(tr->unix_time + (cs - tr->civil_sec));
-}
-
-std::string TimeZoneInfo::Version() const { return version_; }
-
-std::string TimeZoneInfo::Description() const {
-  std::ostringstream oss;
-  oss << "#trans=" << transitions_.size();
-  oss << " #types=" << transition_types_.size();
-  oss << " spec='" << future_spec_ << "'";
-  return oss.str();
-}
-
-bool TimeZoneInfo::NextTransition(const time_point<seconds>& tp,
-                                  time_zone::civil_transition* trans) const {
-  if (transitions_.empty()) return false;
-  const Transition* begin = &transitions_[0];
-  const Transition* end = begin + transitions_.size();
-  if (begin->unix_time <= -(1LL << 59)) {
-    // Do not report the BIG_BANG found in some zoneinfo data as it is
-    // really a sentinel, not a transition.  See pre-2018f tz/zic.c.
-    ++begin;
-  }
-  std::int_fast64_t unix_time = ToUnixSeconds(tp);
-  const Transition target = {unix_time, 0, civil_second(), civil_second()};
-  const Transition* tr =
-      std::upper_bound(begin, end, target, Transition::ByUnixTime());
-  for (; tr != end; ++tr) {  // skip no-op transitions
-    std::uint_fast8_t prev_type_index =
-        (tr == begin) ? default_transition_type_ : tr[-1].type_index;
-    if (!EquivTransitions(prev_type_index, tr[0].type_index)) break;
-  }
-  // When tr == end we return false, ignoring future_spec_.
-  if (tr == end) return false;
-  trans->from = tr->prev_civil_sec + 1;
-  trans->to = tr->civil_sec;
-  return true;
-}
-
-bool TimeZoneInfo::PrevTransition(const time_point<seconds>& tp,
-                                  time_zone::civil_transition* trans) const {
-  if (transitions_.empty()) return false;
-  const Transition* begin = &transitions_[0];
-  const Transition* end = begin + transitions_.size();
-  if (begin->unix_time <= -(1LL << 59)) {
-    // Do not report the BIG_BANG found in some zoneinfo data as it is
-    // really a sentinel, not a transition.  See pre-2018f tz/zic.c.
-    ++begin;
-  }
-  std::int_fast64_t unix_time = ToUnixSeconds(tp);
-  if (FromUnixSeconds(unix_time) != tp) {
-    if (unix_time == std::numeric_limits<std::int_fast64_t>::max()) {
-      if (end == begin) return false;  // Ignore future_spec_.
-      trans->from = (--end)->prev_civil_sec + 1;
-      trans->to = end->civil_sec;
-      return true;
-    }
-    unix_time += 1;  // ceils
-  }
-  const Transition target = {unix_time, 0, civil_second(), civil_second()};
-  const Transition* tr =
-      std::lower_bound(begin, end, target, Transition::ByUnixTime());
-  for (; tr != begin; --tr) {  // skip no-op transitions
-    std::uint_fast8_t prev_type_index =
-        (tr - 1 == begin) ? default_transition_type_ : tr[-2].type_index;
-    if (!EquivTransitions(prev_type_index, tr[-1].type_index)) break;
-  }
-  // When tr == end we return the "last" transition, ignoring future_spec_.
-  if (tr == begin) return false;
-  trans->from = (--tr)->prev_civil_sec + 1;
-  trans->to = tr->civil_sec;
-  return true;
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_info.h b/third_party/abseil/absl/time/internal/cctz/src/time_zone_info.h
deleted file mode 100644
index 2467ff5..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_info.h
+++ /dev/null
@@ -1,137 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_INFO_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_INFO_H_
-
-#include <atomic>
-#include <cstddef>
-#include <cstdint>
-#include <string>
-#include <vector>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-#include "absl/time/internal/cctz/include/cctz/zone_info_source.h"
-#include "time_zone_if.h"
-#include "tzfile.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// A transition to a new UTC offset.
-struct Transition {
-  std::int_least64_t unix_time;   // the instant of this transition
-  std::uint_least8_t type_index;  // index of the transition type
-  civil_second civil_sec;         // local civil time of transition
-  civil_second prev_civil_sec;    // local civil time one second earlier
-
-  struct ByUnixTime {
-    inline bool operator()(const Transition& lhs, const Transition& rhs) const {
-      return lhs.unix_time < rhs.unix_time;
-    }
-  };
-  struct ByCivilTime {
-    inline bool operator()(const Transition& lhs, const Transition& rhs) const {
-      return lhs.civil_sec < rhs.civil_sec;
-    }
-  };
-};
-
-// The characteristics of a particular transition.
-struct TransitionType {
-  std::int_least32_t utc_offset;  // the new prevailing UTC offset
-  civil_second civil_max;         // max convertible civil time for offset
-  civil_second civil_min;         // min convertible civil time for offset
-  bool is_dst;                    // did we move into daylight-saving time
-  std::uint_least8_t abbr_index;  // index of the new abbreviation
-};
-
-// A time zone backed by the IANA Time Zone Database (zoneinfo).
-class TimeZoneInfo : public TimeZoneIf {
- public:
-  TimeZoneInfo() = default;
-  TimeZoneInfo(const TimeZoneInfo&) = delete;
-  TimeZoneInfo& operator=(const TimeZoneInfo&) = delete;
-
-  // Loads the zoneinfo for the given name, returning true if successful.
-  bool Load(const std::string& name);
-
-  // TimeZoneIf implementations.
-  time_zone::absolute_lookup BreakTime(
-      const time_point<seconds>& tp) const override;
-  time_zone::civil_lookup MakeTime(const civil_second& cs) const override;
-  bool NextTransition(const time_point<seconds>& tp,
-                      time_zone::civil_transition* trans) const override;
-  bool PrevTransition(const time_point<seconds>& tp,
-                      time_zone::civil_transition* trans) const override;
-  std::string Version() const override;
-  std::string Description() const override;
-
- private:
-  struct Header {            // counts of:
-    std::size_t timecnt;     // transition times
-    std::size_t typecnt;     // transition types
-    std::size_t charcnt;     // zone abbreviation characters
-    std::size_t leapcnt;     // leap seconds (we expect none)
-    std::size_t ttisstdcnt;  // UTC/local indicators (unused)
-    std::size_t ttisutcnt;   // standard/wall indicators (unused)
-
-    bool Build(const tzhead& tzh);
-    std::size_t DataLength(std::size_t time_len) const;
-  };
-
-  bool GetTransitionType(std::int_fast32_t utc_offset, bool is_dst,
-                         const std::string& abbr, std::uint_least8_t* index);
-  bool EquivTransitions(std::uint_fast8_t tt1_index,
-                        std::uint_fast8_t tt2_index) const;
-  bool ExtendTransitions();
-
-  bool ResetToBuiltinUTC(const seconds& offset);
-  bool Load(ZoneInfoSource* zip);
-
-  // Helpers for BreakTime() and MakeTime().
-  time_zone::absolute_lookup LocalTime(std::int_fast64_t unix_time,
-                                       const TransitionType& tt) const;
-  time_zone::absolute_lookup LocalTime(std::int_fast64_t unix_time,
-                                       const Transition& tr) const;
-  time_zone::civil_lookup TimeLocal(const civil_second& cs,
-                                    year_t c4_shift) const;
-
-  std::vector<Transition> transitions_;  // ordered by unix_time and civil_sec
-  std::vector<TransitionType> transition_types_;  // distinct transition types
-  std::uint_fast8_t default_transition_type_;     // for before first transition
-  std::string abbreviations_;  // all the NUL-terminated abbreviations
-
-  std::string version_;      // the tzdata version if available
-  std::string future_spec_;  // for after the last zic transition
-  bool extended_;            // future_spec_ was used to generate transitions
-  year_t last_year_;         // the final year of the generated transitions
-
-  // We remember the transitions found during the last BreakTime() and
-  // MakeTime() calls. If the next request is for the same transition we
-  // will avoid re-searching.
-  mutable std::atomic<std::size_t> local_time_hint_ = {};  // BreakTime() hint
-  mutable std::atomic<std::size_t> time_local_hint_ = {};  // MakeTime() hint
-};
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_INFO_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_libc.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_libc.cc
deleted file mode 100644
index 887dd09..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_libc.cc
+++ /dev/null
@@ -1,315 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#if defined(_WIN32) || defined(_WIN64)
-#define _CRT_SECURE_NO_WARNINGS 1
-#endif
-
-#include "time_zone_libc.h"
-
-#include <chrono>
-#include <ctime>
-#include <limits>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-#if defined(_AIX)
-extern "C" {
-extern long altzone;
-}
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-#if defined(_WIN32) || defined(_WIN64)
-// Uses the globals: '_timezone', '_dstbias' and '_tzname'.
-auto tm_gmtoff(const std::tm& tm) -> decltype(_timezone + _dstbias) {
-  const bool is_dst = tm.tm_isdst > 0;
-  return _timezone + (is_dst ? _dstbias : 0);
-}
-auto tm_zone(const std::tm& tm) -> decltype(_tzname[0]) {
-  const bool is_dst = tm.tm_isdst > 0;
-  return _tzname[is_dst];
-}
-#elif defined(__sun) || defined(_AIX)
-// Uses the globals: 'timezone', 'altzone' and 'tzname'.
-auto tm_gmtoff(const std::tm& tm) -> decltype(timezone) {
-  const bool is_dst = tm.tm_isdst > 0;
-  return is_dst ? altzone : timezone;
-}
-auto tm_zone(const std::tm& tm) -> decltype(tzname[0]) {
-  const bool is_dst = tm.tm_isdst > 0;
-  return tzname[is_dst];
-}
-#elif defined(__native_client__) || defined(__myriad2__) || \
-    defined(__EMSCRIPTEN__)
-// Uses the globals: 'timezone' and 'tzname'.
-auto tm_gmtoff(const std::tm& tm) -> decltype(_timezone + 0) {
-  const bool is_dst = tm.tm_isdst > 0;
-  return _timezone + (is_dst ? 60 * 60 : 0);
-}
-auto tm_zone(const std::tm& tm) -> decltype(tzname[0]) {
-  const bool is_dst = tm.tm_isdst > 0;
-  return tzname[is_dst];
-}
-#else
-// Adapt to different spellings of the struct std::tm extension fields.
-#if defined(tm_gmtoff)
-auto tm_gmtoff(const std::tm& tm) -> decltype(tm.tm_gmtoff) {
-  return tm.tm_gmtoff;
-}
-#elif defined(__tm_gmtoff)
-auto tm_gmtoff(const std::tm& tm) -> decltype(tm.__tm_gmtoff) {
-  return tm.__tm_gmtoff;
-}
-#else
-template <typename T>
-auto tm_gmtoff(const T& tm) -> decltype(tm.tm_gmtoff) {
-  return tm.tm_gmtoff;
-}
-template <typename T>
-auto tm_gmtoff(const T& tm) -> decltype(tm.__tm_gmtoff) {
-  return tm.__tm_gmtoff;
-}
-#endif  // tm_gmtoff
-#if defined(tm_zone)
-auto tm_zone(const std::tm& tm) -> decltype(tm.tm_zone) { return tm.tm_zone; }
-#elif defined(__tm_zone)
-auto tm_zone(const std::tm& tm) -> decltype(tm.__tm_zone) {
-  return tm.__tm_zone;
-}
-#else
-template <typename T>
-auto tm_zone(const T& tm) -> decltype(tm.tm_zone) {
-  return tm.tm_zone;
-}
-template <typename T>
-auto tm_zone(const T& tm) -> decltype(tm.__tm_zone) {
-  return tm.__tm_zone;
-}
-#endif  // tm_zone
-#endif
-
-inline std::tm* gm_time(const std::time_t* timep, std::tm* result) {
-#if defined(_WIN32) || defined(_WIN64)
-  return gmtime_s(result, timep) ? nullptr : result;
-#else
-  return gmtime_r(timep, result);
-#endif
-}
-
-inline std::tm* local_time(const std::time_t* timep, std::tm* result) {
-#if defined(_WIN32) || defined(_WIN64)
-  return localtime_s(result, timep) ? nullptr : result;
-#else
-  return localtime_r(timep, result);
-#endif
-}
-
-// Converts a civil second and "dst" flag into a time_t and UTC offset.
-// Returns false if time_t cannot represent the requested civil second.
-// Caller must have already checked that cs.year() will fit into a tm_year.
-bool make_time(const civil_second& cs, int is_dst, std::time_t* t, int* off) {
-  std::tm tm;
-  tm.tm_year = static_cast<int>(cs.year() - year_t{1900});
-  tm.tm_mon = cs.month() - 1;
-  tm.tm_mday = cs.day();
-  tm.tm_hour = cs.hour();
-  tm.tm_min = cs.minute();
-  tm.tm_sec = cs.second();
-  tm.tm_isdst = is_dst;
-  *t = std::mktime(&tm);
-  if (*t == std::time_t{-1}) {
-    std::tm tm2;
-    const std::tm* tmp = local_time(t, &tm2);
-    if (tmp == nullptr || tmp->tm_year != tm.tm_year ||
-        tmp->tm_mon != tm.tm_mon || tmp->tm_mday != tm.tm_mday ||
-        tmp->tm_hour != tm.tm_hour || tmp->tm_min != tm.tm_min ||
-        tmp->tm_sec != tm.tm_sec) {
-      // A true error (not just one second before the epoch).
-      return false;
-    }
-  }
-  *off = static_cast<int>(tm_gmtoff(tm));
-  return true;
-}
-
-// Find the least time_t in [lo:hi] where local time matches offset, given:
-// (1) lo doesn't match, (2) hi does, and (3) there is only one transition.
-std::time_t find_trans(std::time_t lo, std::time_t hi, int offset) {
-  std::tm tm;
-  while (lo + 1 != hi) {
-    const std::time_t mid = lo + (hi - lo) / 2;
-    std::tm* tmp = local_time(&mid, &tm);
-    if (tmp != nullptr) {
-      if (tm_gmtoff(*tmp) == offset) {
-        hi = mid;
-      } else {
-        lo = mid;
-      }
-    } else {
-      // If std::tm cannot hold some result we resort to a linear search,
-      // ignoring all failed conversions.  Slow, but never really happens.
-      while (++lo != hi) {
-        tmp = local_time(&lo, &tm);
-        if (tmp != nullptr) {
-          if (tm_gmtoff(*tmp) == offset) break;
-        }
-      }
-      return lo;
-    }
-  }
-  return hi;
-}
-
-}  // namespace
-
-TimeZoneLibC::TimeZoneLibC(const std::string& name)
-    : local_(name == "localtime") {}
-
-time_zone::absolute_lookup TimeZoneLibC::BreakTime(
-    const time_point<seconds>& tp) const {
-  time_zone::absolute_lookup al;
-  al.offset = 0;
-  al.is_dst = false;
-  al.abbr = "-00";
-
-  const std::int_fast64_t s = ToUnixSeconds(tp);
-
-  // If std::time_t cannot hold the input we saturate the output.
-  if (s < std::numeric_limits<std::time_t>::min()) {
-    al.cs = civil_second::min();
-    return al;
-  }
-  if (s > std::numeric_limits<std::time_t>::max()) {
-    al.cs = civil_second::max();
-    return al;
-  }
-
-  const std::time_t t = static_cast<std::time_t>(s);
-  std::tm tm;
-  std::tm* tmp = local_ ? local_time(&t, &tm) : gm_time(&t, &tm);
-
-  // If std::tm cannot hold the result we saturate the output.
-  if (tmp == nullptr) {
-    al.cs = (s < 0) ? civil_second::min() : civil_second::max();
-    return al;
-  }
-
-  const year_t year = tmp->tm_year + year_t{1900};
-  al.cs = civil_second(year, tmp->tm_mon + 1, tmp->tm_mday, tmp->tm_hour,
-                       tmp->tm_min, tmp->tm_sec);
-  al.offset = static_cast<int>(tm_gmtoff(*tmp));
-  al.abbr = local_ ? tm_zone(*tmp) : "UTC";  // as expected by cctz
-  al.is_dst = tmp->tm_isdst > 0;
-  return al;
-}
-
-time_zone::civil_lookup TimeZoneLibC::MakeTime(const civil_second& cs) const {
-  if (!local_) {
-    // If time_point<seconds> cannot hold the result we saturate.
-    static const civil_second min_tp_cs =
-        civil_second() + ToUnixSeconds(time_point<seconds>::min());
-    static const civil_second max_tp_cs =
-        civil_second() + ToUnixSeconds(time_point<seconds>::max());
-    const time_point<seconds> tp = (cs < min_tp_cs) ? time_point<seconds>::min()
-                                   : (cs > max_tp_cs)
-                                       ? time_point<seconds>::max()
-                                       : FromUnixSeconds(cs - civil_second());
-    return {time_zone::civil_lookup::UNIQUE, tp, tp, tp};
-  }
-
-  // If tm_year cannot hold the requested year we saturate the result.
-  if (cs.year() < 0) {
-    if (cs.year() < std::numeric_limits<int>::min() + year_t{1900}) {
-      const time_point<seconds> tp = time_point<seconds>::min();
-      return {time_zone::civil_lookup::UNIQUE, tp, tp, tp};
-    }
-  } else {
-    if (cs.year() - year_t{1900} > std::numeric_limits<int>::max()) {
-      const time_point<seconds> tp = time_point<seconds>::max();
-      return {time_zone::civil_lookup::UNIQUE, tp, tp, tp};
-    }
-  }
-
-  // We probe with "is_dst" values of 0 and 1 to try to distinguish unique
-  // civil seconds from skipped or repeated ones.  This is not always possible
-  // however, as the "dst" flag does not change over some offset transitions.
-  // We are also subject to the vagaries of mktime() implementations.
-  std::time_t t0, t1;
-  int offset0, offset1;
-  if (make_time(cs, 0, &t0, &offset0) && make_time(cs, 1, &t1, &offset1)) {
-    if (t0 == t1) {
-      // The civil time was singular (pre == trans == post).
-      const time_point<seconds> tp = FromUnixSeconds(t0);
-      return {time_zone::civil_lookup::UNIQUE, tp, tp, tp};
-    }
-
-    if (t0 > t1) {
-      std::swap(t0, t1);
-      std::swap(offset0, offset1);
-    }
-    const std::time_t tt = find_trans(t0, t1, offset1);
-    const time_point<seconds> trans = FromUnixSeconds(tt);
-
-    if (offset0 < offset1) {
-      // The civil time did not exist (pre >= trans > post).
-      const time_point<seconds> pre = FromUnixSeconds(t1);
-      const time_point<seconds> post = FromUnixSeconds(t0);
-      return {time_zone::civil_lookup::SKIPPED, pre, trans, post};
-    }
-
-    // The civil time was ambiguous (pre < trans <= post).
-    const time_point<seconds> pre = FromUnixSeconds(t0);
-    const time_point<seconds> post = FromUnixSeconds(t1);
-    return {time_zone::civil_lookup::REPEATED, pre, trans, post};
-  }
-
-  // make_time() failed somehow so we saturate the result.
-  const time_point<seconds> tp = (cs < civil_second())
-                                     ? time_point<seconds>::min()
-                                     : time_point<seconds>::max();
-  return {time_zone::civil_lookup::UNIQUE, tp, tp, tp};
-}
-
-bool TimeZoneLibC::NextTransition(const time_point<seconds>&,
-                                  time_zone::civil_transition*) const {
-  return false;
-}
-
-bool TimeZoneLibC::PrevTransition(const time_point<seconds>&,
-                                  time_zone::civil_transition*) const {
-  return false;
-}
-
-std::string TimeZoneLibC::Version() const {
-  return std::string();  // unknown
-}
-
-std::string TimeZoneLibC::Description() const {
-  return local_ ? "localtime" : "UTC";
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_libc.h b/third_party/abseil/absl/time/internal/cctz/src/time_zone_libc.h
deleted file mode 100644
index 1da9039..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_libc.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_
-
-#include <string>
-
-#include "absl/base/config.h"
-#include "time_zone_if.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// A time zone backed by gmtime_r(3), localtime_r(3), and mktime(3),
-// and which therefore only supports UTC and the local time zone.
-// TODO: Add support for fixed offsets from UTC.
-class TimeZoneLibC : public TimeZoneIf {
- public:
-  explicit TimeZoneLibC(const std::string& name);
-
-  // TimeZoneIf implementations.
-  time_zone::absolute_lookup BreakTime(
-      const time_point<seconds>& tp) const override;
-  time_zone::civil_lookup MakeTime(const civil_second& cs) const override;
-  bool NextTransition(const time_point<seconds>& tp,
-                      time_zone::civil_transition* trans) const override;
-  bool PrevTransition(const time_point<seconds>& tp,
-                      time_zone::civil_transition* trans) const override;
-  std::string Version() const override;
-  std::string Description() const override;
-
- private:
-  const bool local_;  // localtime or UTC
-};
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_lookup.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_lookup.cc
deleted file mode 100644
index efdea64..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_lookup.cc
+++ /dev/null
@@ -1,187 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-#if defined(__ANDROID__)
-#include <sys/system_properties.h>
-#if defined(__ANDROID_API__) && __ANDROID_API__ >= 21
-#include <dlfcn.h>
-#endif
-#endif
-
-#if defined(__APPLE__)
-#include <CoreFoundation/CFTimeZone.h>
-
-#include <vector>
-#endif
-
-#include <cstdlib>
-#include <cstring>
-#include <string>
-
-#include "time_zone_fixed.h"
-#include "time_zone_impl.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-#if defined(__ANDROID__) && defined(__ANDROID_API__) && __ANDROID_API__ >= 21
-namespace {
-// Android 'L' removes __system_property_get() from the NDK, however
-// it is still a hidden symbol in libc so we use dlsym() to access it.
-// See Chromium's base/sys_info_android.cc for a similar example.
-
-using property_get_func = int (*)(const char*, char*);
-
-property_get_func LoadSystemPropertyGet() {
-  int flag = RTLD_LAZY | RTLD_GLOBAL;
-#if defined(RTLD_NOLOAD)
-  flag |= RTLD_NOLOAD;  // libc.so should already be resident
-#endif
-  if (void* handle = dlopen("libc.so", flag)) {
-    void* sym = dlsym(handle, "__system_property_get");
-    dlclose(handle);
-    return reinterpret_cast<property_get_func>(sym);
-  }
-  return nullptr;
-}
-
-int __system_property_get(const char* name, char* value) {
-  static property_get_func system_property_get = LoadSystemPropertyGet();
-  return system_property_get ? system_property_get(name, value) : -1;
-}
-
-}  // namespace
-#endif
-
-std::string time_zone::name() const { return effective_impl().Name(); }
-
-time_zone::absolute_lookup time_zone::lookup(
-    const time_point<seconds>& tp) const {
-  return effective_impl().BreakTime(tp);
-}
-
-time_zone::civil_lookup time_zone::lookup(const civil_second& cs) const {
-  return effective_impl().MakeTime(cs);
-}
-
-bool time_zone::next_transition(const time_point<seconds>& tp,
-                                civil_transition* trans) const {
-  return effective_impl().NextTransition(tp, trans);
-}
-
-bool time_zone::prev_transition(const time_point<seconds>& tp,
-                                civil_transition* trans) const {
-  return effective_impl().PrevTransition(tp, trans);
-}
-
-std::string time_zone::version() const { return effective_impl().Version(); }
-
-std::string time_zone::description() const {
-  return effective_impl().Description();
-}
-
-const time_zone::Impl& time_zone::effective_impl() const {
-  if (impl_ == nullptr) {
-    // Dereferencing an implicit-UTC time_zone is expected to be
-    // rare, so we don't mind paying a small synchronization cost.
-    return *time_zone::Impl::UTC().impl_;
-  }
-  return *impl_;
-}
-
-bool load_time_zone(const std::string& name, time_zone* tz) {
-  return time_zone::Impl::LoadTimeZone(name, tz);
-}
-
-time_zone utc_time_zone() {
-  return time_zone::Impl::UTC();  // avoid name lookup
-}
-
-time_zone fixed_time_zone(const seconds& offset) {
-  time_zone tz;
-  load_time_zone(FixedOffsetToName(offset), &tz);
-  return tz;
-}
-
-time_zone local_time_zone() {
-  const char* zone = ":localtime";
-#if defined(__ANDROID__)
-  char sysprop[PROP_VALUE_MAX];
-  if (__system_property_get("persist.sys.timezone", sysprop) > 0) {
-    zone = sysprop;
-  }
-#endif
-#if defined(__APPLE__)
-  std::vector<char> buffer;
-  CFTimeZoneRef tz_default = CFTimeZoneCopyDefault();
-  if (CFStringRef tz_name = CFTimeZoneGetName(tz_default)) {
-    CFStringEncoding encoding = kCFStringEncodingUTF8;
-    CFIndex length = CFStringGetLength(tz_name);
-    buffer.resize(CFStringGetMaximumSizeForEncoding(length, encoding) + 1);
-    if (CFStringGetCString(tz_name, &buffer[0], buffer.size(), encoding)) {
-      zone = &buffer[0];
-    }
-  }
-  CFRelease(tz_default);
-#endif
-
-  // Allow ${TZ} to override to default zone.
-  char* tz_env = nullptr;
-#if defined(_MSC_VER)
-  _dupenv_s(&tz_env, nullptr, "TZ");
-#else
-  tz_env = std::getenv("TZ");
-#endif
-  if (tz_env) zone = tz_env;
-
-  // We only support the "[:]<zone-name>" form.
-  if (*zone == ':') ++zone;
-
-  // Map "localtime" to a system-specific name, but
-  // allow ${LOCALTIME} to override the default name.
-  char* localtime_env = nullptr;
-  if (strcmp(zone, "localtime") == 0) {
-#if defined(_MSC_VER)
-    // System-specific default is just "localtime".
-    _dupenv_s(&localtime_env, nullptr, "LOCALTIME");
-#else
-    zone = "/etc/localtime";  // System-specific default.
-    localtime_env = std::getenv("LOCALTIME");
-#endif
-    if (localtime_env) zone = localtime_env;
-  }
-
-  const std::string name = zone;
-#if defined(_MSC_VER)
-  free(localtime_env);
-  free(tz_env);
-#endif
-
-  time_zone tz;
-  load_time_zone(name, &tz);  // Falls back to UTC.
-  // TODO: Follow the RFC3339 "Unknown Local Offset Convention" and
-  // arrange for %z to generate "-0000" when we don't know the local
-  // offset because the load_time_zone() failed and we're using UTC.
-  return tz;
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_lookup_test.cc
deleted file mode 100644
index 9a1a8d6..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ /dev/null
@@ -1,1442 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include <chrono>
-#include <cstddef>
-#include <cstdlib>
-#include <future>
-#include <limits>
-#include <string>
-#include <thread>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-namespace chrono = std::chrono;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-// A list of known time-zone names.
-const char* const kTimeZoneNames[] = {"Africa/Abidjan",
-                                      "Africa/Accra",
-                                      "Africa/Addis_Ababa",
-                                      "Africa/Algiers",
-                                      "Africa/Asmara",
-                                      "Africa/Asmera",
-                                      "Africa/Bamako",
-                                      "Africa/Bangui",
-                                      "Africa/Banjul",
-                                      "Africa/Bissau",
-                                      "Africa/Blantyre",
-                                      "Africa/Brazzaville",
-                                      "Africa/Bujumbura",
-                                      "Africa/Cairo",
-                                      "Africa/Casablanca",
-                                      "Africa/Ceuta",
-                                      "Africa/Conakry",
-                                      "Africa/Dakar",
-                                      "Africa/Dar_es_Salaam",
-                                      "Africa/Djibouti",
-                                      "Africa/Douala",
-                                      "Africa/El_Aaiun",
-                                      "Africa/Freetown",
-                                      "Africa/Gaborone",
-                                      "Africa/Harare",
-                                      "Africa/Johannesburg",
-                                      "Africa/Juba",
-                                      "Africa/Kampala",
-                                      "Africa/Khartoum",
-                                      "Africa/Kigali",
-                                      "Africa/Kinshasa",
-                                      "Africa/Lagos",
-                                      "Africa/Libreville",
-                                      "Africa/Lome",
-                                      "Africa/Luanda",
-                                      "Africa/Lubumbashi",
-                                      "Africa/Lusaka",
-                                      "Africa/Malabo",
-                                      "Africa/Maputo",
-                                      "Africa/Maseru",
-                                      "Africa/Mbabane",
-                                      "Africa/Mogadishu",
-                                      "Africa/Monrovia",
-                                      "Africa/Nairobi",
-                                      "Africa/Ndjamena",
-                                      "Africa/Niamey",
-                                      "Africa/Nouakchott",
-                                      "Africa/Ouagadougou",
-                                      "Africa/Porto-Novo",
-                                      "Africa/Sao_Tome",
-                                      "Africa/Timbuktu",
-                                      "Africa/Tripoli",
-                                      "Africa/Tunis",
-                                      "Africa/Windhoek",
-                                      "America/Adak",
-                                      "America/Anchorage",
-                                      "America/Anguilla",
-                                      "America/Antigua",
-                                      "America/Araguaina",
-                                      "America/Argentina/Buenos_Aires",
-                                      "America/Argentina/Catamarca",
-                                      "America/Argentina/ComodRivadavia",
-                                      "America/Argentina/Cordoba",
-                                      "America/Argentina/Jujuy",
-                                      "America/Argentina/La_Rioja",
-                                      "America/Argentina/Mendoza",
-                                      "America/Argentina/Rio_Gallegos",
-                                      "America/Argentina/Salta",
-                                      "America/Argentina/San_Juan",
-                                      "America/Argentina/San_Luis",
-                                      "America/Argentina/Tucuman",
-                                      "America/Argentina/Ushuaia",
-                                      "America/Aruba",
-                                      "America/Asuncion",
-                                      "America/Atikokan",
-                                      "America/Atka",
-                                      "America/Bahia",
-                                      "America/Bahia_Banderas",
-                                      "America/Barbados",
-                                      "America/Belem",
-                                      "America/Belize",
-                                      "America/Blanc-Sablon",
-                                      "America/Boa_Vista",
-                                      "America/Bogota",
-                                      "America/Boise",
-                                      "America/Buenos_Aires",
-                                      "America/Cambridge_Bay",
-                                      "America/Campo_Grande",
-                                      "America/Cancun",
-                                      "America/Caracas",
-                                      "America/Catamarca",
-                                      "America/Cayenne",
-                                      "America/Cayman",
-                                      "America/Chicago",
-                                      "America/Chihuahua",
-                                      "America/Coral_Harbour",
-                                      "America/Cordoba",
-                                      "America/Costa_Rica",
-                                      "America/Creston",
-                                      "America/Cuiaba",
-                                      "America/Curacao",
-                                      "America/Danmarkshavn",
-                                      "America/Dawson",
-                                      "America/Dawson_Creek",
-                                      "America/Denver",
-                                      "America/Detroit",
-                                      "America/Dominica",
-                                      "America/Edmonton",
-                                      "America/Eirunepe",
-                                      "America/El_Salvador",
-                                      "America/Ensenada",
-                                      "America/Fort_Nelson",
-                                      "America/Fort_Wayne",
-                                      "America/Fortaleza",
-                                      "America/Glace_Bay",
-                                      "America/Godthab",
-                                      "America/Goose_Bay",
-                                      "America/Grand_Turk",
-                                      "America/Grenada",
-                                      "America/Guadeloupe",
-                                      "America/Guatemala",
-                                      "America/Guayaquil",
-                                      "America/Guyana",
-                                      "America/Halifax",
-                                      "America/Havana",
-                                      "America/Hermosillo",
-                                      "America/Indiana/Indianapolis",
-                                      "America/Indiana/Knox",
-                                      "America/Indiana/Marengo",
-                                      "America/Indiana/Petersburg",
-                                      "America/Indiana/Tell_City",
-                                      "America/Indiana/Vevay",
-                                      "America/Indiana/Vincennes",
-                                      "America/Indiana/Winamac",
-                                      "America/Indianapolis",
-                                      "America/Inuvik",
-                                      "America/Iqaluit",
-                                      "America/Jamaica",
-                                      "America/Jujuy",
-                                      "America/Juneau",
-                                      "America/Kentucky/Louisville",
-                                      "America/Kentucky/Monticello",
-                                      "America/Knox_IN",
-                                      "America/Kralendijk",
-                                      "America/La_Paz",
-                                      "America/Lima",
-                                      "America/Los_Angeles",
-                                      "America/Louisville",
-                                      "America/Lower_Princes",
-                                      "America/Maceio",
-                                      "America/Managua",
-                                      "America/Manaus",
-                                      "America/Marigot",
-                                      "America/Martinique",
-                                      "America/Matamoros",
-                                      "America/Mazatlan",
-                                      "America/Mendoza",
-                                      "America/Menominee",
-                                      "America/Merida",
-                                      "America/Metlakatla",
-                                      "America/Mexico_City",
-                                      "America/Miquelon",
-                                      "America/Moncton",
-                                      "America/Monterrey",
-                                      "America/Montevideo",
-                                      "America/Montreal",
-                                      "America/Montserrat",
-                                      "America/Nassau",
-                                      "America/New_York",
-                                      "America/Nipigon",
-                                      "America/Nome",
-                                      "America/Noronha",
-                                      "America/North_Dakota/Beulah",
-                                      "America/North_Dakota/Center",
-                                      "America/North_Dakota/New_Salem",
-                                      "America/Nuuk",
-                                      "America/Ojinaga",
-                                      "America/Panama",
-                                      "America/Pangnirtung",
-                                      "America/Paramaribo",
-                                      "America/Phoenix",
-                                      "America/Port-au-Prince",
-                                      "America/Port_of_Spain",
-                                      "America/Porto_Acre",
-                                      "America/Porto_Velho",
-                                      "America/Puerto_Rico",
-                                      "America/Punta_Arenas",
-                                      "America/Rainy_River",
-                                      "America/Rankin_Inlet",
-                                      "America/Recife",
-                                      "America/Regina",
-                                      "America/Resolute",
-                                      "America/Rio_Branco",
-                                      "America/Rosario",
-                                      "America/Santa_Isabel",
-                                      "America/Santarem",
-                                      "America/Santiago",
-                                      "America/Santo_Domingo",
-                                      "America/Sao_Paulo",
-                                      "America/Scoresbysund",
-                                      "America/Shiprock",
-                                      "America/Sitka",
-                                      "America/St_Barthelemy",
-                                      "America/St_Johns",
-                                      "America/St_Kitts",
-                                      "America/St_Lucia",
-                                      "America/St_Thomas",
-                                      "America/St_Vincent",
-                                      "America/Swift_Current",
-                                      "America/Tegucigalpa",
-                                      "America/Thule",
-                                      "America/Thunder_Bay",
-                                      "America/Tijuana",
-                                      "America/Toronto",
-                                      "America/Tortola",
-                                      "America/Vancouver",
-                                      "America/Virgin",
-                                      "America/Whitehorse",
-                                      "America/Winnipeg",
-                                      "America/Yakutat",
-                                      "America/Yellowknife",
-                                      "Antarctica/Casey",
-                                      "Antarctica/Davis",
-                                      "Antarctica/DumontDUrville",
-                                      "Antarctica/Macquarie",
-                                      "Antarctica/Mawson",
-                                      "Antarctica/McMurdo",
-                                      "Antarctica/Palmer",
-                                      "Antarctica/Rothera",
-                                      "Antarctica/South_Pole",
-                                      "Antarctica/Syowa",
-                                      "Antarctica/Troll",
-                                      "Antarctica/Vostok",
-                                      "Arctic/Longyearbyen",
-                                      "Asia/Aden",
-                                      "Asia/Almaty",
-                                      "Asia/Amman",
-                                      "Asia/Anadyr",
-                                      "Asia/Aqtau",
-                                      "Asia/Aqtobe",
-                                      "Asia/Ashgabat",
-                                      "Asia/Ashkhabad",
-                                      "Asia/Atyrau",
-                                      "Asia/Baghdad",
-                                      "Asia/Bahrain",
-                                      "Asia/Baku",
-                                      "Asia/Bangkok",
-                                      "Asia/Barnaul",
-                                      "Asia/Beirut",
-                                      "Asia/Bishkek",
-                                      "Asia/Brunei",
-                                      "Asia/Calcutta",
-                                      "Asia/Chita",
-                                      "Asia/Choibalsan",
-                                      "Asia/Chongqing",
-                                      "Asia/Chungking",
-                                      "Asia/Colombo",
-                                      "Asia/Dacca",
-                                      "Asia/Damascus",
-                                      "Asia/Dhaka",
-                                      "Asia/Dili",
-                                      "Asia/Dubai",
-                                      "Asia/Dushanbe",
-                                      "Asia/Famagusta",
-                                      "Asia/Gaza",
-                                      "Asia/Harbin",
-                                      "Asia/Hebron",
-                                      "Asia/Ho_Chi_Minh",
-                                      "Asia/Hong_Kong",
-                                      "Asia/Hovd",
-                                      "Asia/Irkutsk",
-                                      "Asia/Istanbul",
-                                      "Asia/Jakarta",
-                                      "Asia/Jayapura",
-                                      "Asia/Jerusalem",
-                                      "Asia/Kabul",
-                                      "Asia/Kamchatka",
-                                      "Asia/Karachi",
-                                      "Asia/Kashgar",
-                                      "Asia/Kathmandu",
-                                      "Asia/Katmandu",
-                                      "Asia/Khandyga",
-                                      "Asia/Kolkata",
-                                      "Asia/Krasnoyarsk",
-                                      "Asia/Kuala_Lumpur",
-                                      "Asia/Kuching",
-                                      "Asia/Kuwait",
-                                      "Asia/Macao",
-                                      "Asia/Macau",
-                                      "Asia/Magadan",
-                                      "Asia/Makassar",
-                                      "Asia/Manila",
-                                      "Asia/Muscat",
-                                      "Asia/Nicosia",
-                                      "Asia/Novokuznetsk",
-                                      "Asia/Novosibirsk",
-                                      "Asia/Omsk",
-                                      "Asia/Oral",
-                                      "Asia/Phnom_Penh",
-                                      "Asia/Pontianak",
-                                      "Asia/Pyongyang",
-                                      "Asia/Qatar",
-                                      "Asia/Qostanay",
-                                      "Asia/Qyzylorda",
-                                      "Asia/Rangoon",
-                                      "Asia/Riyadh",
-                                      "Asia/Saigon",
-                                      "Asia/Sakhalin",
-                                      "Asia/Samarkand",
-                                      "Asia/Seoul",
-                                      "Asia/Shanghai",
-                                      "Asia/Singapore",
-                                      "Asia/Srednekolymsk",
-                                      "Asia/Taipei",
-                                      "Asia/Tashkent",
-                                      "Asia/Tbilisi",
-                                      "Asia/Tehran",
-                                      "Asia/Tel_Aviv",
-                                      "Asia/Thimbu",
-                                      "Asia/Thimphu",
-                                      "Asia/Tokyo",
-                                      "Asia/Tomsk",
-                                      "Asia/Ujung_Pandang",
-                                      "Asia/Ulaanbaatar",
-                                      "Asia/Ulan_Bator",
-                                      "Asia/Urumqi",
-                                      "Asia/Ust-Nera",
-                                      "Asia/Vientiane",
-                                      "Asia/Vladivostok",
-                                      "Asia/Yakutsk",
-                                      "Asia/Yangon",
-                                      "Asia/Yekaterinburg",
-                                      "Asia/Yerevan",
-                                      "Atlantic/Azores",
-                                      "Atlantic/Bermuda",
-                                      "Atlantic/Canary",
-                                      "Atlantic/Cape_Verde",
-                                      "Atlantic/Faeroe",
-                                      "Atlantic/Faroe",
-                                      "Atlantic/Jan_Mayen",
-                                      "Atlantic/Madeira",
-                                      "Atlantic/Reykjavik",
-                                      "Atlantic/South_Georgia",
-                                      "Atlantic/St_Helena",
-                                      "Atlantic/Stanley",
-                                      "Australia/ACT",
-                                      "Australia/Adelaide",
-                                      "Australia/Brisbane",
-                                      "Australia/Broken_Hill",
-                                      "Australia/Canberra",
-                                      "Australia/Currie",
-                                      "Australia/Darwin",
-                                      "Australia/Eucla",
-                                      "Australia/Hobart",
-                                      "Australia/LHI",
-                                      "Australia/Lindeman",
-                                      "Australia/Lord_Howe",
-                                      "Australia/Melbourne",
-                                      "Australia/NSW",
-                                      "Australia/North",
-                                      "Australia/Perth",
-                                      "Australia/Queensland",
-                                      "Australia/South",
-                                      "Australia/Sydney",
-                                      "Australia/Tasmania",
-                                      "Australia/Victoria",
-                                      "Australia/West",
-                                      "Australia/Yancowinna",
-                                      "Brazil/Acre",
-                                      "Brazil/DeNoronha",
-                                      "Brazil/East",
-                                      "Brazil/West",
-                                      "CET",
-                                      "CST6CDT",
-                                      "Canada/Atlantic",
-                                      "Canada/Central",
-                                      "Canada/Eastern",
-                                      "Canada/Mountain",
-                                      "Canada/Newfoundland",
-                                      "Canada/Pacific",
-                                      "Canada/Saskatchewan",
-                                      "Canada/Yukon",
-                                      "Chile/Continental",
-                                      "Chile/EasterIsland",
-                                      "Cuba",
-                                      "EET",
-                                      "EST",
-                                      "EST5EDT",
-                                      "Egypt",
-                                      "Eire",
-                                      "Etc/GMT",
-                                      "Etc/GMT+0",
-                                      "Etc/GMT+1",
-                                      "Etc/GMT+10",
-                                      "Etc/GMT+11",
-                                      "Etc/GMT+12",
-                                      "Etc/GMT+2",
-                                      "Etc/GMT+3",
-                                      "Etc/GMT+4",
-                                      "Etc/GMT+5",
-                                      "Etc/GMT+6",
-                                      "Etc/GMT+7",
-                                      "Etc/GMT+8",
-                                      "Etc/GMT+9",
-                                      "Etc/GMT-0",
-                                      "Etc/GMT-1",
-                                      "Etc/GMT-10",
-                                      "Etc/GMT-11",
-                                      "Etc/GMT-12",
-                                      "Etc/GMT-13",
-                                      "Etc/GMT-14",
-                                      "Etc/GMT-2",
-                                      "Etc/GMT-3",
-                                      "Etc/GMT-4",
-                                      "Etc/GMT-5",
-                                      "Etc/GMT-6",
-                                      "Etc/GMT-7",
-                                      "Etc/GMT-8",
-                                      "Etc/GMT-9",
-                                      "Etc/GMT0",
-                                      "Etc/Greenwich",
-                                      "Etc/UCT",
-                                      "Etc/UTC",
-                                      "Etc/Universal",
-                                      "Etc/Zulu",
-                                      "Europe/Amsterdam",
-                                      "Europe/Andorra",
-                                      "Europe/Astrakhan",
-                                      "Europe/Athens",
-                                      "Europe/Belfast",
-                                      "Europe/Belgrade",
-                                      "Europe/Berlin",
-                                      "Europe/Bratislava",
-                                      "Europe/Brussels",
-                                      "Europe/Bucharest",
-                                      "Europe/Budapest",
-                                      "Europe/Busingen",
-                                      "Europe/Chisinau",
-                                      "Europe/Copenhagen",
-                                      "Europe/Dublin",
-                                      "Europe/Gibraltar",
-                                      "Europe/Guernsey",
-                                      "Europe/Helsinki",
-                                      "Europe/Isle_of_Man",
-                                      "Europe/Istanbul",
-                                      "Europe/Jersey",
-                                      "Europe/Kaliningrad",
-                                      "Europe/Kiev",
-                                      "Europe/Kirov",
-                                      "Europe/Lisbon",
-                                      "Europe/Ljubljana",
-                                      "Europe/London",
-                                      "Europe/Luxembourg",
-                                      "Europe/Madrid",
-                                      "Europe/Malta",
-                                      "Europe/Mariehamn",
-                                      "Europe/Minsk",
-                                      "Europe/Monaco",
-                                      "Europe/Moscow",
-                                      "Europe/Nicosia",
-                                      "Europe/Oslo",
-                                      "Europe/Paris",
-                                      "Europe/Podgorica",
-                                      "Europe/Prague",
-                                      "Europe/Riga",
-                                      "Europe/Rome",
-                                      "Europe/Samara",
-                                      "Europe/San_Marino",
-                                      "Europe/Sarajevo",
-                                      "Europe/Saratov",
-                                      "Europe/Simferopol",
-                                      "Europe/Skopje",
-                                      "Europe/Sofia",
-                                      "Europe/Stockholm",
-                                      "Europe/Tallinn",
-                                      "Europe/Tirane",
-                                      "Europe/Tiraspol",
-                                      "Europe/Ulyanovsk",
-                                      "Europe/Uzhgorod",
-                                      "Europe/Vaduz",
-                                      "Europe/Vatican",
-                                      "Europe/Vienna",
-                                      "Europe/Vilnius",
-                                      "Europe/Volgograd",
-                                      "Europe/Warsaw",
-                                      "Europe/Zagreb",
-                                      "Europe/Zaporozhye",
-                                      "Europe/Zurich",
-                                      "GB",
-                                      "GB-Eire",
-                                      "GMT",
-                                      "GMT+0",
-                                      "GMT-0",
-                                      "GMT0",
-                                      "Greenwich",
-                                      "HST",
-                                      "Hongkong",
-                                      "Iceland",
-                                      "Indian/Antananarivo",
-                                      "Indian/Chagos",
-                                      "Indian/Christmas",
-                                      "Indian/Cocos",
-                                      "Indian/Comoro",
-                                      "Indian/Kerguelen",
-                                      "Indian/Mahe",
-                                      "Indian/Maldives",
-                                      "Indian/Mauritius",
-                                      "Indian/Mayotte",
-                                      "Indian/Reunion",
-                                      "Iran",
-                                      "Israel",
-                                      "Jamaica",
-                                      "Japan",
-                                      "Kwajalein",
-                                      "Libya",
-                                      "MET",
-                                      "MST",
-                                      "MST7MDT",
-                                      "Mexico/BajaNorte",
-                                      "Mexico/BajaSur",
-                                      "Mexico/General",
-                                      "NZ",
-                                      "NZ-CHAT",
-                                      "Navajo",
-                                      "PRC",
-                                      "PST8PDT",
-                                      "Pacific/Apia",
-                                      "Pacific/Auckland",
-                                      "Pacific/Bougainville",
-                                      "Pacific/Chatham",
-                                      "Pacific/Chuuk",
-                                      "Pacific/Easter",
-                                      "Pacific/Efate",
-                                      "Pacific/Enderbury",
-                                      "Pacific/Fakaofo",
-                                      "Pacific/Fiji",
-                                      "Pacific/Funafuti",
-                                      "Pacific/Galapagos",
-                                      "Pacific/Gambier",
-                                      "Pacific/Guadalcanal",
-                                      "Pacific/Guam",
-                                      "Pacific/Honolulu",
-                                      "Pacific/Johnston",
-                                      "Pacific/Kiritimati",
-                                      "Pacific/Kosrae",
-                                      "Pacific/Kwajalein",
-                                      "Pacific/Majuro",
-                                      "Pacific/Marquesas",
-                                      "Pacific/Midway",
-                                      "Pacific/Nauru",
-                                      "Pacific/Niue",
-                                      "Pacific/Norfolk",
-                                      "Pacific/Noumea",
-                                      "Pacific/Pago_Pago",
-                                      "Pacific/Palau",
-                                      "Pacific/Pitcairn",
-                                      "Pacific/Pohnpei",
-                                      "Pacific/Ponape",
-                                      "Pacific/Port_Moresby",
-                                      "Pacific/Rarotonga",
-                                      "Pacific/Saipan",
-                                      "Pacific/Samoa",
-                                      "Pacific/Tahiti",
-                                      "Pacific/Tarawa",
-                                      "Pacific/Tongatapu",
-                                      "Pacific/Truk",
-                                      "Pacific/Wake",
-                                      "Pacific/Wallis",
-                                      "Pacific/Yap",
-                                      "Poland",
-                                      "Portugal",
-                                      "ROC",
-                                      "ROK",
-                                      "Singapore",
-                                      "Turkey",
-                                      "UCT",
-                                      "US/Alaska",
-                                      "US/Aleutian",
-                                      "US/Arizona",
-                                      "US/Central",
-                                      "US/East-Indiana",
-                                      "US/Eastern",
-                                      "US/Hawaii",
-                                      "US/Indiana-Starke",
-                                      "US/Michigan",
-                                      "US/Mountain",
-                                      "US/Pacific",
-                                      "US/Samoa",
-                                      "UTC",
-                                      "Universal",
-                                      "W-SU",
-                                      "WET",
-                                      "Zulu",
-                                      nullptr};
-
-// Helper to return a loaded time zone by value (UTC on error).
-time_zone LoadZone(const std::string& name) {
-  time_zone tz;
-  load_time_zone(name, &tz);
-  return tz;
-}
-
-// This helper is a macro so that failed expectations show up with the
-// correct line numbers.
-#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \
-  do {                                                            \
-    time_zone::absolute_lookup al = tz.lookup(tp);                \
-    EXPECT_EQ(y, al.cs.year());                                   \
-    EXPECT_EQ(m, al.cs.month());                                  \
-    EXPECT_EQ(d, al.cs.day());                                    \
-    EXPECT_EQ(hh, al.cs.hour());                                  \
-    EXPECT_EQ(mm, al.cs.minute());                                \
-    EXPECT_EQ(ss, al.cs.second());                                \
-    EXPECT_EQ(off, al.offset);                                    \
-    EXPECT_TRUE(isdst == al.is_dst);                              \
-    /* EXPECT_STREQ(zone, al.abbr); */                            \
-  } while (0)
-
-// These tests sometimes run on platforms that have zoneinfo data so old
-// that the transition we are attempting to check does not exist, most
-// notably Android emulators.  Fortunately, AndroidZoneInfoSource supports
-// time_zone::version() so, in cases where we've learned that it matters,
-// we can make the check conditionally.
-int VersionCmp(time_zone tz, const std::string& target) {
-  std::string version = tz.version();
-  if (version.empty() && !target.empty()) return 1;  // unknown > known
-  return version.compare(target);
-}
-
-}  // namespace
-
-#if !defined(__EMSCRIPTEN__)
-TEST(TimeZones, LoadZonesConcurrently) {
-  std::promise<void> ready_promise;
-  std::shared_future<void> ready_future(ready_promise.get_future());
-  auto load_zones = [ready_future](std::promise<void>* started,
-                                   std::set<std::string>* failures) {
-    started->set_value();
-    ready_future.wait();
-    for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) {
-      std::string zone = *np;
-      time_zone tz;
-      if (load_time_zone(zone, &tz)) {
-        EXPECT_EQ(zone, tz.name());
-      } else {
-        failures->insert(zone);
-      }
-    }
-  };
-
-  const std::size_t n_threads = 128;
-  std::vector<std::thread> threads;
-  std::vector<std::set<std::string>> thread_failures(n_threads);
-  for (std::size_t i = 0; i != n_threads; ++i) {
-    std::promise<void> started;
-    threads.emplace_back(load_zones, &started, &thread_failures[i]);
-    started.get_future().wait();
-  }
-  ready_promise.set_value();
-  for (auto& thread : threads) {
-    thread.join();
-  }
-
-  // Allow a small number of failures to account for skew between
-  // the contents of kTimeZoneNames and the zoneinfo data source.
-#if defined(__ANDROID__)
-  // Cater to the possibility of using an even older zoneinfo data
-  // source when running on Android, where it is difficult to override
-  // the bionic tzdata provided by the test environment.
-  const std::size_t max_failures = 20;
-#else
-  const std::size_t max_failures = 3;
-#endif
-  std::set<std::string> failures;
-  for (const auto& thread_failure : thread_failures) {
-    failures.insert(thread_failure.begin(), thread_failure.end());
-  }
-  EXPECT_LE(failures.size(), max_failures) << testing::PrintToString(failures);
-}
-#endif
-
-TEST(TimeZone, NamedTimeZones) {
-  const time_zone utc = utc_time_zone();
-  EXPECT_EQ("UTC", utc.name());
-  const time_zone nyc = LoadZone("America/New_York");
-  EXPECT_EQ("America/New_York", nyc.name());
-  const time_zone syd = LoadZone("Australia/Sydney");
-  EXPECT_EQ("Australia/Sydney", syd.name());
-  const time_zone fixed0 =
-      fixed_time_zone(absl::time_internal::cctz::seconds::zero());
-  EXPECT_EQ("UTC", fixed0.name());
-  const time_zone fixed_pos = fixed_time_zone(
-      chrono::hours(3) + chrono::minutes(25) + chrono::seconds(45));
-  EXPECT_EQ("Fixed/UTC+03:25:45", fixed_pos.name());
-  const time_zone fixed_neg = fixed_time_zone(
-      -(chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56)));
-  EXPECT_EQ("Fixed/UTC-12:34:56", fixed_neg.name());
-}
-
-TEST(TimeZone, Failures) {
-  time_zone tz;
-  EXPECT_FALSE(load_time_zone(":America/Los_Angeles", &tz));
-
-  tz = LoadZone("America/Los_Angeles");
-  EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz));
-  EXPECT_EQ(chrono::system_clock::from_time_t(0),
-            convert(civil_second(1970, 1, 1, 0, 0, 0), tz));  // UTC
-
-  // Ensures that the load still fails on a subsequent attempt.
-  tz = LoadZone("America/Los_Angeles");
-  EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz));
-  EXPECT_EQ(chrono::system_clock::from_time_t(0),
-            convert(civil_second(1970, 1, 1, 0, 0, 0), tz));  // UTC
-
-  // Loading an empty string timezone should fail.
-  tz = LoadZone("America/Los_Angeles");
-  EXPECT_FALSE(load_time_zone("", &tz));
-  EXPECT_EQ(chrono::system_clock::from_time_t(0),
-            convert(civil_second(1970, 1, 1, 0, 0, 0), tz));  // UTC
-}
-
-TEST(TimeZone, Equality) {
-  const time_zone a;
-  const time_zone b;
-  EXPECT_EQ(a, b);
-  EXPECT_EQ(a.name(), b.name());
-
-  const time_zone implicit_utc;
-  const time_zone explicit_utc = utc_time_zone();
-  EXPECT_EQ(implicit_utc, explicit_utc);
-  EXPECT_EQ(implicit_utc.name(), explicit_utc.name());
-
-  const time_zone fixed_zero =
-      fixed_time_zone(absl::time_internal::cctz::seconds::zero());
-  EXPECT_EQ(fixed_zero, LoadZone(fixed_zero.name()));
-  EXPECT_EQ(fixed_zero, explicit_utc);
-
-  const time_zone fixed_utc = LoadZone("Fixed/UTC+00:00:00");
-  EXPECT_EQ(fixed_utc, LoadZone(fixed_utc.name()));
-  EXPECT_EQ(fixed_utc, explicit_utc);
-
-  const time_zone fixed_pos = fixed_time_zone(
-      chrono::hours(3) + chrono::minutes(25) + chrono::seconds(45));
-  EXPECT_EQ(fixed_pos, LoadZone(fixed_pos.name()));
-  EXPECT_NE(fixed_pos, explicit_utc);
-  const time_zone fixed_neg = fixed_time_zone(
-      -(chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56)));
-  EXPECT_EQ(fixed_neg, LoadZone(fixed_neg.name()));
-  EXPECT_NE(fixed_neg, explicit_utc);
-
-  const time_zone fixed_lim = fixed_time_zone(chrono::hours(24));
-  EXPECT_EQ(fixed_lim, LoadZone(fixed_lim.name()));
-  EXPECT_NE(fixed_lim, explicit_utc);
-  const time_zone fixed_ovfl =
-      fixed_time_zone(chrono::hours(24) + chrono::seconds(1));
-  EXPECT_EQ(fixed_ovfl, LoadZone(fixed_ovfl.name()));
-  EXPECT_EQ(fixed_ovfl, explicit_utc);
-
-  EXPECT_EQ(fixed_time_zone(chrono::seconds(1)),
-            fixed_time_zone(chrono::seconds(1)));
-
-  const time_zone local = local_time_zone();
-  EXPECT_EQ(local, LoadZone(local.name()));
-
-  time_zone la = LoadZone("America/Los_Angeles");
-  time_zone nyc = LoadZone("America/New_York");
-  EXPECT_NE(la, nyc);
-}
-
-TEST(StdChronoTimePoint, TimeTAlignment) {
-  // Ensures that the Unix epoch and the system clock epoch are an integral
-  // number of seconds apart. This simplifies conversions to/from time_t.
-  auto diff =
-      chrono::system_clock::time_point() - chrono::system_clock::from_time_t(0);
-  EXPECT_EQ(chrono::system_clock::time_point::duration::zero(),
-            diff % chrono::seconds(1));
-}
-
-TEST(BreakTime, TimePointResolution) {
-  const time_zone utc = utc_time_zone();
-  const auto t0 = chrono::system_clock::from_time_t(0);
-
-  ExpectTime(chrono::time_point_cast<chrono::nanoseconds>(t0), utc, 1970, 1, 1,
-             0, 0, 0, 0, false, "UTC");
-  ExpectTime(chrono::time_point_cast<chrono::microseconds>(t0), utc, 1970, 1, 1,
-             0, 0, 0, 0, false, "UTC");
-  ExpectTime(chrono::time_point_cast<chrono::milliseconds>(t0), utc, 1970, 1, 1,
-             0, 0, 0, 0, false, "UTC");
-  ExpectTime(chrono::time_point_cast<chrono::seconds>(t0), utc, 1970, 1, 1, 0,
-             0, 0, 0, false, "UTC");
-  ExpectTime(chrono::time_point_cast<absl::time_internal::cctz::seconds>(t0),
-             utc, 1970, 1, 1, 0, 0, 0, 0, false, "UTC");
-  ExpectTime(chrono::time_point_cast<chrono::minutes>(t0), utc, 1970, 1, 1, 0,
-             0, 0, 0, false, "UTC");
-  ExpectTime(chrono::time_point_cast<chrono::hours>(t0), utc, 1970, 1, 1, 0, 0,
-             0, 0, false, "UTC");
-}
-
-TEST(BreakTime, LocalTimeInUTC) {
-  const time_zone tz = utc_time_zone();
-  const auto tp = chrono::system_clock::from_time_t(0);
-  ExpectTime(tp, tz, 1970, 1, 1, 0, 0, 0, 0, false, "UTC");
-  EXPECT_EQ(weekday::thursday, get_weekday(convert(tp, tz)));
-}
-
-TEST(BreakTime, LocalTimeInUTCUnaligned) {
-  const time_zone tz = utc_time_zone();
-  const auto tp =
-      chrono::system_clock::from_time_t(0) - chrono::milliseconds(500);
-  ExpectTime(tp, tz, 1969, 12, 31, 23, 59, 59, 0, false, "UTC");
-  EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz)));
-}
-
-TEST(BreakTime, LocalTimePosix) {
-  // See IEEE Std 1003.1-1988 B.2.3 General Terms, Epoch.
-  const time_zone tz = utc_time_zone();
-  const auto tp = chrono::system_clock::from_time_t(536457599);
-  ExpectTime(tp, tz, 1986, 12, 31, 23, 59, 59, 0, false, "UTC");
-  EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz)));
-}
-
-TEST(TimeZoneImpl, LocalTimeInFixed) {
-  const absl::time_internal::cctz::seconds offset =
-      -(chrono::hours(8) + chrono::minutes(33) + chrono::seconds(47));
-  const time_zone tz = fixed_time_zone(offset);
-  const auto tp = chrono::system_clock::from_time_t(0);
-  ExpectTime(tp, tz, 1969, 12, 31, 15, 26, 13, offset.count(), false,
-             "-083347");
-  EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz)));
-}
-
-TEST(BreakTime, LocalTimeInNewYork) {
-  const time_zone tz = LoadZone("America/New_York");
-  const auto tp = chrono::system_clock::from_time_t(45);
-  ExpectTime(tp, tz, 1969, 12, 31, 19, 0, 45, -5 * 60 * 60, false, "EST");
-  EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz)));
-}
-
-TEST(BreakTime, LocalTimeInMTV) {
-  const time_zone tz = LoadZone("America/Los_Angeles");
-  const auto tp = chrono::system_clock::from_time_t(1380855729);
-  ExpectTime(tp, tz, 2013, 10, 3, 20, 2, 9, -7 * 60 * 60, true, "PDT");
-  EXPECT_EQ(weekday::thursday, get_weekday(convert(tp, tz)));
-}
-
-TEST(BreakTime, LocalTimeInSydney) {
-  const time_zone tz = LoadZone("Australia/Sydney");
-  const auto tp = chrono::system_clock::from_time_t(90);
-  ExpectTime(tp, tz, 1970, 1, 1, 10, 1, 30, 10 * 60 * 60, false, "AEST");
-  EXPECT_EQ(weekday::thursday, get_weekday(convert(tp, tz)));
-}
-
-TEST(MakeTime, TimePointResolution) {
-  const time_zone utc = utc_time_zone();
-  const time_point<chrono::nanoseconds> tp_ns =
-      convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
-  EXPECT_EQ("04:05", format("%M:%E*S", tp_ns, utc));
-  const time_point<chrono::microseconds> tp_us =
-      convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
-  EXPECT_EQ("04:05", format("%M:%E*S", tp_us, utc));
-  const time_point<chrono::milliseconds> tp_ms =
-      convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
-  EXPECT_EQ("04:05", format("%M:%E*S", tp_ms, utc));
-  const time_point<chrono::seconds> tp_s =
-      convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
-  EXPECT_EQ("04:05", format("%M:%E*S", tp_s, utc));
-  const time_point<absl::time_internal::cctz::seconds> tp_s64 =
-      convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
-  EXPECT_EQ("04:05", format("%M:%E*S", tp_s64, utc));
-
-  // These next two require chrono::time_point_cast because the conversion
-  // from a resolution of seconds (the return value of convert()) to a
-  // coarser resolution requires an explicit cast.
-  const time_point<chrono::minutes> tp_m =
-      chrono::time_point_cast<chrono::minutes>(
-          convert(civil_second(2015, 1, 2, 3, 4, 5), utc));
-  EXPECT_EQ("04:00", format("%M:%E*S", tp_m, utc));
-  const time_point<chrono::hours> tp_h = chrono::time_point_cast<chrono::hours>(
-      convert(civil_second(2015, 1, 2, 3, 4, 5), utc));
-  EXPECT_EQ("00:00", format("%M:%E*S", tp_h, utc));
-}
-
-TEST(MakeTime, Normalization) {
-  const time_zone tz = LoadZone("America/New_York");
-  const auto tp = convert(civil_second(2009, 2, 13, 18, 31, 30), tz);
-  EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp);
-
-  // Now requests for the same time_point but with out-of-range fields.
-  EXPECT_EQ(tp, convert(civil_second(2008, 14, 13, 18, 31, 30), tz));  // month
-  EXPECT_EQ(tp, convert(civil_second(2009, 1, 44, 18, 31, 30), tz));   // day
-  EXPECT_EQ(tp, convert(civil_second(2009, 2, 12, 42, 31, 30), tz));   // hour
-  EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 17, 91, 30), tz));   // minute
-  EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 18, 30, 90), tz));   // second
-}
-
-// NOTE: Run this with -ftrapv to detect overflow problems.
-TEST(MakeTime, SysSecondsLimits) {
-  const char RFC3339[] = "%Y-%m-%d%ET%H:%M:%S%Ez";
-  const time_zone utc = utc_time_zone();
-  const time_zone east = fixed_time_zone(chrono::hours(14));
-  const time_zone west = fixed_time_zone(-chrono::hours(14));
-  time_point<absl::time_internal::cctz::seconds> tp;
-
-  // Approach the maximal time_point<cctz::seconds> value from below.
-  tp = convert(civil_second(292277026596, 12, 4, 15, 30, 6), utc);
-  EXPECT_EQ("292277026596-12-04T15:30:06+00:00", format(RFC3339, tp, utc));
-  tp = convert(civil_second(292277026596, 12, 4, 15, 30, 7), utc);
-  EXPECT_EQ("292277026596-12-04T15:30:07+00:00", format(RFC3339, tp, utc));
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-  tp = convert(civil_second(292277026596, 12, 4, 15, 30, 8), utc);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-  tp = convert(civil_second::max(), utc);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-
-  // Checks that we can also get the maximal value for a far-east zone.
-  tp = convert(civil_second(292277026596, 12, 5, 5, 30, 7), east);
-  EXPECT_EQ("292277026596-12-05T05:30:07+14:00", format(RFC3339, tp, east));
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-  tp = convert(civil_second(292277026596, 12, 5, 5, 30, 8), east);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-  tp = convert(civil_second::max(), east);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-
-  // Checks that we can also get the maximal value for a far-west zone.
-  tp = convert(civil_second(292277026596, 12, 4, 1, 30, 7), west);
-  EXPECT_EQ("292277026596-12-04T01:30:07-14:00", format(RFC3339, tp, west));
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-  tp = convert(civil_second(292277026596, 12, 4, 7, 30, 8), west);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-  tp = convert(civil_second::max(), west);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
-
-  // Approach the minimal time_point<cctz::seconds> value from above.
-  tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 53), utc);
-  EXPECT_EQ("-292277022657-01-27T08:29:53+00:00", format(RFC3339, tp, utc));
-  tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 52), utc);
-  EXPECT_EQ("-292277022657-01-27T08:29:52+00:00", format(RFC3339, tp, utc));
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-  tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 51), utc);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-  tp = convert(civil_second::min(), utc);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-
-  // Checks that we can also get the minimal value for a far-east zone.
-  tp = convert(civil_second(-292277022657, 1, 27, 22, 29, 52), east);
-  EXPECT_EQ("-292277022657-01-27T22:29:52+14:00", format(RFC3339, tp, east));
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-  tp = convert(civil_second(-292277022657, 1, 27, 22, 29, 51), east);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-  tp = convert(civil_second::min(), east);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-
-  // Checks that we can also get the minimal value for a far-west zone.
-  tp = convert(civil_second(-292277022657, 1, 26, 18, 29, 52), west);
-  EXPECT_EQ("-292277022657-01-26T18:29:52-14:00", format(RFC3339, tp, west));
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-  tp = convert(civil_second(-292277022657, 1, 26, 18, 29, 51), west);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-  tp = convert(civil_second::min(), west);
-  EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
-
-  // Some similar checks for the "libc" time-zone implementation.
-  if (sizeof(std::time_t) >= 8) {
-    // Checks that "tm_year + 1900", as used by the "libc" implementation,
-    // can produce year values beyond the range on an int without overflow.
-#if defined(_WIN32) || defined(_WIN64)
-    // localtime_s() and gmtime_s() don't believe in years outside [1970:3000].
-#else
-    const time_zone cut = LoadZone("libc:UTC");
-    const year_t max_tm_year = year_t{std::numeric_limits<int>::max()} + 1900;
-    tp = convert(civil_second(max_tm_year, 12, 31, 23, 59, 59), cut);
-#if defined(__FreeBSD__) || defined(__OpenBSD__)
-    // The BSD gmtime_r() fails on extreme positive tm_year values.
-#else
-    EXPECT_EQ("2147485547-12-31T23:59:59+00:00", format(RFC3339, tp, cut));
-#endif
-    const year_t min_tm_year = year_t{std::numeric_limits<int>::min()} + 1900;
-    tp = convert(civil_second(min_tm_year, 1, 1, 0, 0, 0), cut);
-    EXPECT_EQ("-2147481748-01-01T00:00:00+00:00", format(RFC3339, tp, cut));
-#endif
-  }
-}
-
-TEST(MakeTime, LocalTimeLibC) {
-  // Checks that cctz and libc agree on transition points in [1970:2037].
-  //
-  // We limit this test case to environments where:
-  //  1) we know how to change the time zone used by localtime()/mktime(),
-  //  2) cctz and localtime()/mktime() will use similar-enough tzdata, and
-  //  3) we have some idea about how mktime() behaves during transitions.
-#if defined(__linux__) && !defined(__ANDROID__)
-  const char* const ep = getenv("TZ");
-  std::string tz_name = (ep != nullptr) ? ep : "";
-  for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) {
-    ASSERT_EQ(0, setenv("TZ", *np, 1));  // change what "localtime" means
-    const auto zi = local_time_zone();
-    const auto lc = LoadZone("libc:localtime");
-    time_zone::civil_transition transition;
-    for (auto tp = zi.lookup(civil_second()).trans;
-         zi.next_transition(tp, &transition);
-         tp = zi.lookup(transition.to).trans) {
-      const auto fcl = zi.lookup(transition.from);
-      const auto tcl = zi.lookup(transition.to);
-      civil_second cs;  // compare cs in zi and lc
-      if (fcl.kind == time_zone::civil_lookup::UNIQUE) {
-        if (tcl.kind == time_zone::civil_lookup::UNIQUE) {
-          // Both unique; must be an is_dst or abbr change.
-          ASSERT_EQ(transition.from, transition.to);
-          const auto trans = fcl.trans;
-          const auto tal = zi.lookup(trans);
-          const auto tprev = trans - absl::time_internal::cctz::seconds(1);
-          const auto pal = zi.lookup(tprev);
-          if (pal.is_dst == tal.is_dst) {
-            ASSERT_STRNE(pal.abbr, tal.abbr);
-          }
-          continue;
-        }
-        ASSERT_EQ(time_zone::civil_lookup::REPEATED, tcl.kind);
-        cs = transition.to;
-      } else {
-        ASSERT_EQ(time_zone::civil_lookup::UNIQUE, tcl.kind);
-        ASSERT_EQ(time_zone::civil_lookup::SKIPPED, fcl.kind);
-        cs = transition.from;
-      }
-      if (cs.year() > 2037) break;  // limit test time (and to 32-bit time_t)
-      const auto cl_zi = zi.lookup(cs);
-      if (zi.lookup(cl_zi.pre).is_dst == zi.lookup(cl_zi.post).is_dst) {
-        // The "libc" implementation cannot correctly classify transitions
-        // that don't change the "tm_isdst" flag.  In Europe/Volgograd, for
-        // example, there is a SKIPPED transition from +03 to +04 with dst=F
-        // on both sides ...
-        //   1540681199 = 2018-10-28 01:59:59 +03:00:00 [dst=F off=10800]
-        //   1540681200 = 2018-10-28 03:00:00 +04:00:00 [dst=F off=14400]
-        // but std::mktime(2018-10-28 02:00:00, tm_isdst=0) fails, unlike,
-        // say, the similar Europe/Chisinau transition from +02 to +03 ...
-        //   1521935999 = 2018-03-25 01:59:59 +02:00:00 [dst=F off=7200]
-        //   1521936000 = 2018-03-25 03:00:00 +03:00:00 [dst=T off=10800]
-        // where std::mktime(2018-03-25 02:00:00, tm_isdst=0) succeeds and
-        // returns 1521936000.
-        continue;
-      }
-      if (cs == civil_second(2037, 10, 4, 2, 0, 0)) {
-        const std::string tzname = *np;
-        if (tzname == "Africa/Casablanca" || tzname == "Africa/El_Aaiun") {
-          // The "libc" implementation gets this transition wrong (at least
-          // until 2018g when it was removed), returning an offset of 3600
-          // instead of 0.  TODO: Revert this when 2018g is ubiquitous.
-          continue;
-        }
-      }
-      const auto cl_lc = lc.lookup(cs);
-      SCOPED_TRACE(testing::Message() << "For " << cs << " in " << *np);
-      EXPECT_EQ(cl_zi.kind, cl_lc.kind);
-      EXPECT_EQ(cl_zi.pre, cl_lc.pre);
-      EXPECT_EQ(cl_zi.trans, cl_lc.trans);
-      EXPECT_EQ(cl_zi.post, cl_lc.post);
-    }
-  }
-  if (ep == nullptr) {
-    ASSERT_EQ(0, unsetenv("TZ"));
-  } else {
-    ASSERT_EQ(0, setenv("TZ", tz_name.c_str(), 1));
-  }
-#endif
-}
-
-TEST(NextTransition, UTC) {
-  const auto tz = utc_time_zone();
-  time_zone::civil_transition trans;
-
-  auto tp = time_point<absl::time_internal::cctz::seconds>::min();
-  EXPECT_FALSE(tz.next_transition(tp, &trans));
-
-  tp = time_point<absl::time_internal::cctz::seconds>::max();
-  EXPECT_FALSE(tz.next_transition(tp, &trans));
-}
-
-TEST(PrevTransition, UTC) {
-  const auto tz = utc_time_zone();
-  time_zone::civil_transition trans;
-
-  auto tp = time_point<absl::time_internal::cctz::seconds>::max();
-  EXPECT_FALSE(tz.prev_transition(tp, &trans));
-
-  tp = time_point<absl::time_internal::cctz::seconds>::min();
-  EXPECT_FALSE(tz.prev_transition(tp, &trans));
-}
-
-TEST(NextTransition, AmericaNewYork) {
-  const auto tz = LoadZone("America/New_York");
-  time_zone::civil_transition trans;
-
-  auto tp = convert(civil_second(2018, 6, 30, 0, 0, 0), tz);
-  EXPECT_TRUE(tz.next_transition(tp, &trans));
-  EXPECT_EQ(civil_second(2018, 11, 4, 2, 0, 0), trans.from);
-  EXPECT_EQ(civil_second(2018, 11, 4, 1, 0, 0), trans.to);
-
-  tp = time_point<absl::time_internal::cctz::seconds>::max();
-  EXPECT_FALSE(tz.next_transition(tp, &trans));
-
-  tp = time_point<absl::time_internal::cctz::seconds>::min();
-  EXPECT_TRUE(tz.next_transition(tp, &trans));
-  if (trans.from == civil_second(1918, 3, 31, 2, 0, 0)) {
-    // It looks like the tzdata is only 32 bit (probably macOS),
-    // which bottoms out at 1901-12-13T20:45:52+00:00.
-    EXPECT_EQ(civil_second(1918, 3, 31, 3, 0, 0), trans.to);
-  } else {
-    EXPECT_EQ(civil_second(1883, 11, 18, 12, 3, 58), trans.from);
-    EXPECT_EQ(civil_second(1883, 11, 18, 12, 0, 0), trans.to);
-  }
-}
-
-TEST(PrevTransition, AmericaNewYork) {
-  const auto tz = LoadZone("America/New_York");
-  time_zone::civil_transition trans;
-
-  auto tp = convert(civil_second(2018, 6, 30, 0, 0, 0), tz);
-  EXPECT_TRUE(tz.prev_transition(tp, &trans));
-  EXPECT_EQ(civil_second(2018, 3, 11, 2, 0, 0), trans.from);
-  EXPECT_EQ(civil_second(2018, 3, 11, 3, 0, 0), trans.to);
-
-  tp = time_point<absl::time_internal::cctz::seconds>::min();
-  EXPECT_FALSE(tz.prev_transition(tp, &trans));
-
-  tp = time_point<absl::time_internal::cctz::seconds>::max();
-  EXPECT_TRUE(tz.prev_transition(tp, &trans));
-  // We have a transition but we don't know which one.
-}
-
-TEST(TimeZoneEdgeCase, AmericaNewYork) {
-  const time_zone tz = LoadZone("America/New_York");
-
-  // Spring 1:59:59 -> 3:00:00
-  auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -5 * 3600, false, "EST");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 3, 10, 3, 0, 0, -4 * 3600, true, "EDT");
-
-  // Fall 1:59:59 -> 1:00:00
-  tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -4 * 3600, true, "EDT");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -5 * 3600, false, "EST");
-}
-
-TEST(TimeZoneEdgeCase, AmericaLosAngeles) {
-  const time_zone tz = LoadZone("America/Los_Angeles");
-
-  // Spring 1:59:59 -> 3:00:00
-  auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -8 * 3600, false, "PST");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 3, 10, 3, 0, 0, -7 * 3600, true, "PDT");
-
-  // Fall 1:59:59 -> 1:00:00
-  tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -7 * 3600, true, "PDT");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -8 * 3600, false, "PST");
-}
-
-TEST(TimeZoneEdgeCase, ArizonaNoTransition) {
-  const time_zone tz = LoadZone("America/Phoenix");
-
-  // No transition in Spring.
-  auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -7 * 3600, false, "MST");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 3, 10, 2, 0, 0, -7 * 3600, false, "MST");
-
-  // No transition in Fall.
-  tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -7 * 3600, false, "MST");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 11, 3, 2, 0, 0, -7 * 3600, false, "MST");
-}
-
-TEST(TimeZoneEdgeCase, AsiaKathmandu) {
-  const time_zone tz = LoadZone("Asia/Kathmandu");
-
-  // A non-DST offset change from +0530 to +0545
-  //
-  //   504901799 == Tue, 31 Dec 1985 23:59:59 +0530 (+0530)
-  //   504901800 == Wed,  1 Jan 1986 00:15:00 +0545 (+0545)
-  auto tp = convert(civil_second(1985, 12, 31, 23, 59, 59), tz);
-  ExpectTime(tp, tz, 1985, 12, 31, 23, 59, 59, 5.5 * 3600, false, "+0530");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 1986, 1, 1, 0, 15, 0, 5.75 * 3600, false, "+0545");
-}
-
-TEST(TimeZoneEdgeCase, PacificChatham) {
-  const time_zone tz = LoadZone("Pacific/Chatham");
-
-  // One-hour DST offset changes, but at atypical values
-  //
-  //   1365256799 == Sun,  7 Apr 2013 03:44:59 +1345 (+1345)
-  //   1365256800 == Sun,  7 Apr 2013 02:45:00 +1245 (+1245)
-  auto tp = convert(civil_second(2013, 4, 7, 3, 44, 59), tz);
-  ExpectTime(tp, tz, 2013, 4, 7, 3, 44, 59, 13.75 * 3600, true, "+1345");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 4, 7, 2, 45, 0, 12.75 * 3600, false, "+1245");
-
-  //   1380376799 == Sun, 29 Sep 2013 02:44:59 +1245 (+1245)
-  //   1380376800 == Sun, 29 Sep 2013 03:45:00 +1345 (+1345)
-  tp = convert(civil_second(2013, 9, 29, 2, 44, 59), tz);
-  ExpectTime(tp, tz, 2013, 9, 29, 2, 44, 59, 12.75 * 3600, false, "+1245");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 9, 29, 3, 45, 0, 13.75 * 3600, true, "+1345");
-}
-
-TEST(TimeZoneEdgeCase, AustraliaLordHowe) {
-  const time_zone tz = LoadZone("Australia/Lord_Howe");
-
-  // Half-hour DST offset changes
-  //
-  //   1365260399 == Sun,  7 Apr 2013 01:59:59 +1100 (+11)
-  //   1365260400 == Sun,  7 Apr 2013 01:30:00 +1030 (+1030)
-  auto tp = convert(civil_second(2013, 4, 7, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 4, 7, 1, 59, 59, 11 * 3600, true, "+11");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 4, 7, 1, 30, 0, 10.5 * 3600, false, "+1030");
-
-  //   1380986999 == Sun,  6 Oct 2013 01:59:59 +1030 (+1030)
-  //   1380987000 == Sun,  6 Oct 2013 02:30:00 +1100 (+11)
-  tp = convert(civil_second(2013, 10, 6, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 2013, 10, 6, 1, 59, 59, 10.5 * 3600, false, "+1030");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2013, 10, 6, 2, 30, 0, 11 * 3600, true, "+11");
-}
-
-TEST(TimeZoneEdgeCase, PacificApia) {
-  const time_zone tz = LoadZone("Pacific/Apia");
-
-  // At the end of December 2011, Samoa jumped forward by one day,
-  // skipping 30 December from the local calendar, when the nation
-  // moved to the west of the International Date Line.
-  //
-  // A one-day, non-DST offset change
-  //
-  //   1325239199 == Thu, 29 Dec 2011 23:59:59 -1000 (-10)
-  //   1325239200 == Sat, 31 Dec 2011 00:00:00 +1400 (+14)
-  auto tp = convert(civil_second(2011, 12, 29, 23, 59, 59), tz);
-  ExpectTime(tp, tz, 2011, 12, 29, 23, 59, 59, -10 * 3600, true, "-10");
-  EXPECT_EQ(363, get_yearday(convert(tp, tz)));
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2011, 12, 31, 0, 0, 0, 14 * 3600, true, "+14");
-  EXPECT_EQ(365, get_yearday(convert(tp, tz)));
-}
-
-TEST(TimeZoneEdgeCase, AfricaCairo) {
-  const time_zone tz = LoadZone("Africa/Cairo");
-
-  if (VersionCmp(tz, "2014c") >= 0) {
-    // An interesting case of midnight not existing.
-    //
-    //   1400191199 == Thu, 15 May 2014 23:59:59 +0200 (EET)
-    //   1400191200 == Fri, 16 May 2014 01:00:00 +0300 (EEST)
-    auto tp = convert(civil_second(2014, 5, 15, 23, 59, 59), tz);
-    ExpectTime(tp, tz, 2014, 5, 15, 23, 59, 59, 2 * 3600, false, "EET");
-    tp += absl::time_internal::cctz::seconds(1);
-    ExpectTime(tp, tz, 2014, 5, 16, 1, 0, 0, 3 * 3600, true, "EEST");
-  }
-}
-
-TEST(TimeZoneEdgeCase, AfricaMonrovia) {
-  const time_zone tz = LoadZone("Africa/Monrovia");
-
-  if (VersionCmp(tz, "2017b") >= 0) {
-    // Strange offset change -00:44:30 -> +00:00:00 (non-DST)
-    //
-    //   63593069 == Thu,  6 Jan 1972 23:59:59 -0044 (MMT)
-    //   63593070 == Fri,  7 Jan 1972 00:44:30 +0000 (GMT)
-    auto tp = convert(civil_second(1972, 1, 6, 23, 59, 59), tz);
-    ExpectTime(tp, tz, 1972, 1, 6, 23, 59, 59, -44.5 * 60, false, "MMT");
-    tp += absl::time_internal::cctz::seconds(1);
-    ExpectTime(tp, tz, 1972, 1, 7, 0, 44, 30, 0 * 60, false, "GMT");
-  }
-}
-
-TEST(TimeZoneEdgeCase, AmericaJamaica) {
-  // Jamaica discontinued DST transitions in 1983, and is now at a
-  // constant -0500.  This makes it an interesting edge-case target.
-  // Note that the 32-bit times used in a (tzh_version == 0) zoneinfo
-  // file cannot represent the abbreviation-only transition of 1890,
-  // so we ignore the abbreviation by expecting what we received.
-  const time_zone tz = LoadZone("America/Jamaica");
-
-  // Before the first transition.
-  if (!tz.version().empty() && VersionCmp(tz, "2018d") >= 0) {
-    // We avoid the expectations on the -18430 offset below unless we are
-    // certain we have commit 907241e (Fix off-by-1 error for Jamaica and
-    // T&C before 1913) from 2018d.  TODO: Remove the "version() not empty"
-    // part when 2018d is generally available from /usr/share/zoneinfo.
-    auto tp = convert(civil_second(1889, 12, 31, 0, 0, 0), tz);
-    ExpectTime(tp, tz, 1889, 12, 31, 0, 0, 0, -18430, false,
-               tz.lookup(tp).abbr);
-
-    // Over the first (abbreviation-change only) transition.
-    //   -2524503170 == Tue, 31 Dec 1889 23:59:59 -0507 (LMT)
-    //   -2524503169 == Wed,  1 Jan 1890 00:00:00 -0507 (KMT)
-    tp = convert(civil_second(1889, 12, 31, 23, 59, 59), tz);
-    ExpectTime(tp, tz, 1889, 12, 31, 23, 59, 59, -18430, false,
-               tz.lookup(tp).abbr);
-    tp += absl::time_internal::cctz::seconds(1);
-    ExpectTime(tp, tz, 1890, 1, 1, 0, 0, 0, -18430, false, "KMT");
-  }
-
-  // Over the last (DST) transition.
-  //     436341599 == Sun, 30 Oct 1983 01:59:59 -0400 (EDT)
-  //     436341600 == Sun, 30 Oct 1983 01:00:00 -0500 (EST)
-  auto tp = convert(civil_second(1983, 10, 30, 1, 59, 59), tz);
-  ExpectTime(tp, tz, 1983, 10, 30, 1, 59, 59, -4 * 3600, true, "EDT");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 1983, 10, 30, 1, 0, 0, -5 * 3600, false, "EST");
-
-  // After the last transition.
-  tp = convert(civil_second(1983, 12, 31, 23, 59, 59), tz);
-  ExpectTime(tp, tz, 1983, 12, 31, 23, 59, 59, -5 * 3600, false, "EST");
-}
-
-TEST(TimeZoneEdgeCase, WET) {
-  // Cover some non-existent times within forward transitions.
-  const time_zone tz = LoadZone("WET");
-
-  // Before the first transition.
-  auto tp = convert(civil_second(1977, 1, 1, 0, 0, 0), tz);
-  ExpectTime(tp, tz, 1977, 1, 1, 0, 0, 0, 0, false, "WET");
-
-  // Over the first transition.
-  //     228877199 == Sun,  3 Apr 1977 00:59:59 +0000 (WET)
-  //     228877200 == Sun,  3 Apr 1977 02:00:00 +0100 (WEST)
-  tp = convert(civil_second(1977, 4, 3, 0, 59, 59), tz);
-  ExpectTime(tp, tz, 1977, 4, 3, 0, 59, 59, 0, false, "WET");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 1977, 4, 3, 2, 0, 0, 1 * 3600, true, "WEST");
-
-  // A non-existent time within the first transition.
-  time_zone::civil_lookup cl1 = tz.lookup(civil_second(1977, 4, 3, 1, 15, 0));
-  EXPECT_EQ(time_zone::civil_lookup::SKIPPED, cl1.kind);
-  ExpectTime(cl1.pre, tz, 1977, 4, 3, 2, 15, 0, 1 * 3600, true, "WEST");
-  ExpectTime(cl1.trans, tz, 1977, 4, 3, 2, 0, 0, 1 * 3600, true, "WEST");
-  ExpectTime(cl1.post, tz, 1977, 4, 3, 0, 15, 0, 0 * 3600, false, "WET");
-
-  // A non-existent time within the second forward transition.
-  time_zone::civil_lookup cl2 = tz.lookup(civil_second(1978, 4, 2, 1, 15, 0));
-  EXPECT_EQ(time_zone::civil_lookup::SKIPPED, cl2.kind);
-  ExpectTime(cl2.pre, tz, 1978, 4, 2, 2, 15, 0, 1 * 3600, true, "WEST");
-  ExpectTime(cl2.trans, tz, 1978, 4, 2, 2, 0, 0, 1 * 3600, true, "WEST");
-  ExpectTime(cl2.post, tz, 1978, 4, 2, 0, 15, 0, 0 * 3600, false, "WET");
-}
-
-TEST(TimeZoneEdgeCase, FixedOffsets) {
-  const time_zone gmtm5 = LoadZone("Etc/GMT+5");  // -0500
-  auto tp = convert(civil_second(1970, 1, 1, 0, 0, 0), gmtm5);
-  ExpectTime(tp, gmtm5, 1970, 1, 1, 0, 0, 0, -5 * 3600, false, "-05");
-  EXPECT_EQ(chrono::system_clock::from_time_t(5 * 3600), tp);
-
-  const time_zone gmtp5 = LoadZone("Etc/GMT-5");  // +0500
-  tp = convert(civil_second(1970, 1, 1, 0, 0, 0), gmtp5);
-  ExpectTime(tp, gmtp5, 1970, 1, 1, 0, 0, 0, 5 * 3600, false, "+05");
-  EXPECT_EQ(chrono::system_clock::from_time_t(-5 * 3600), tp);
-}
-
-TEST(TimeZoneEdgeCase, NegativeYear) {
-  // Tests transition from year 0 (aka 1BCE) to year -1.
-  const time_zone tz = utc_time_zone();
-  auto tp = convert(civil_second(0, 1, 1, 0, 0, 0), tz);
-  ExpectTime(tp, tz, 0, 1, 1, 0, 0, 0, 0 * 3600, false, "UTC");
-  EXPECT_EQ(weekday::saturday, get_weekday(convert(tp, tz)));
-  tp -= absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, -1, 12, 31, 23, 59, 59, 0 * 3600, false, "UTC");
-  EXPECT_EQ(weekday::friday, get_weekday(convert(tp, tz)));
-}
-
-TEST(TimeZoneEdgeCase, UTC32bitLimit) {
-  const time_zone tz = utc_time_zone();
-
-  // Limits of signed 32-bit time_t
-  //
-  //   2147483647 == Tue, 19 Jan 2038 03:14:07 +0000 (UTC)
-  //   2147483648 == Tue, 19 Jan 2038 03:14:08 +0000 (UTC)
-  auto tp = convert(civil_second(2038, 1, 19, 3, 14, 7), tz);
-  ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 7, 0 * 3600, false, "UTC");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 8, 0 * 3600, false, "UTC");
-}
-
-TEST(TimeZoneEdgeCase, UTC5DigitYear) {
-  const time_zone tz = utc_time_zone();
-
-  // Rollover to 5-digit year
-  //
-  //   253402300799 == Fri, 31 Dec 9999 23:59:59 +0000 (UTC)
-  //   253402300800 == Sat,  1 Jan 1000 00:00:00 +0000 (UTC)
-  auto tp = convert(civil_second(9999, 12, 31, 23, 59, 59), tz);
-  ExpectTime(tp, tz, 9999, 12, 31, 23, 59, 59, 0 * 3600, false, "UTC");
-  tp += absl::time_internal::cctz::seconds(1);
-  ExpectTime(tp, tz, 10000, 1, 1, 0, 0, 0, 0 * 3600, false, "UTC");
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_posix.cc b/third_party/abseil/absl/time/internal/cctz/src/time_zone_posix.cc
deleted file mode 100644
index 5cdd09e..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_posix.cc
+++ /dev/null
@@ -1,159 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "time_zone_posix.h"
-
-#include <cstddef>
-#include <cstring>
-#include <limits>
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-namespace {
-
-const char kDigits[] = "0123456789";
-
-const char* ParseInt(const char* p, int min, int max, int* vp) {
-  int value = 0;
-  const char* op = p;
-  const int kMaxInt = std::numeric_limits<int>::max();
-  for (; const char* dp = strchr(kDigits, *p); ++p) {
-    int d = static_cast<int>(dp - kDigits);
-    if (d >= 10) break;  // '\0'
-    if (value > kMaxInt / 10) return nullptr;
-    value *= 10;
-    if (value > kMaxInt - d) return nullptr;
-    value += d;
-  }
-  if (p == op || value < min || value > max) return nullptr;
-  *vp = value;
-  return p;
-}
-
-// abbr = <.*?> | [^-+,\d]{3,}
-const char* ParseAbbr(const char* p, std::string* abbr) {
-  const char* op = p;
-  if (*p == '<') {  // special zoneinfo <...> form
-    while (*++p != '>') {
-      if (*p == '\0') return nullptr;
-    }
-    abbr->assign(op + 1, static_cast<std::size_t>(p - op) - 1);
-    return ++p;
-  }
-  while (*p != '\0') {
-    if (strchr("-+,", *p)) break;
-    if (strchr(kDigits, *p)) break;
-    ++p;
-  }
-  if (p - op < 3) return nullptr;
-  abbr->assign(op, static_cast<std::size_t>(p - op));
-  return p;
-}
-
-// offset = [+|-]hh[:mm[:ss]] (aggregated into single seconds value)
-const char* ParseOffset(const char* p, int min_hour, int max_hour, int sign,
-                        std::int_fast32_t* offset) {
-  if (p == nullptr) return nullptr;
-  if (*p == '+' || *p == '-') {
-    if (*p++ == '-') sign = -sign;
-  }
-  int hours = 0;
-  int minutes = 0;
-  int seconds = 0;
-
-  p = ParseInt(p, min_hour, max_hour, &hours);
-  if (p == nullptr) return nullptr;
-  if (*p == ':') {
-    p = ParseInt(p + 1, 0, 59, &minutes);
-    if (p == nullptr) return nullptr;
-    if (*p == ':') {
-      p = ParseInt(p + 1, 0, 59, &seconds);
-      if (p == nullptr) return nullptr;
-    }
-  }
-  *offset = sign * ((((hours * 60) + minutes) * 60) + seconds);
-  return p;
-}
-
-// datetime = ( Jn | n | Mm.w.d ) [ / offset ]
-const char* ParseDateTime(const char* p, PosixTransition* res) {
-  if (p != nullptr && *p == ',') {
-    if (*++p == 'M') {
-      int month = 0;
-      if ((p = ParseInt(p + 1, 1, 12, &month)) != nullptr && *p == '.') {
-        int week = 0;
-        if ((p = ParseInt(p + 1, 1, 5, &week)) != nullptr && *p == '.') {
-          int weekday = 0;
-          if ((p = ParseInt(p + 1, 0, 6, &weekday)) != nullptr) {
-            res->date.fmt = PosixTransition::M;
-            res->date.m.month = static_cast<std::int_fast8_t>(month);
-            res->date.m.week = static_cast<std::int_fast8_t>(week);
-            res->date.m.weekday = static_cast<std::int_fast8_t>(weekday);
-          }
-        }
-      }
-    } else if (*p == 'J') {
-      int day = 0;
-      if ((p = ParseInt(p + 1, 1, 365, &day)) != nullptr) {
-        res->date.fmt = PosixTransition::J;
-        res->date.j.day = static_cast<std::int_fast16_t>(day);
-      }
-    } else {
-      int day = 0;
-      if ((p = ParseInt(p, 0, 365, &day)) != nullptr) {
-        res->date.fmt = PosixTransition::N;
-        res->date.n.day = static_cast<std::int_fast16_t>(day);
-      }
-    }
-  }
-  if (p != nullptr) {
-    res->time.offset = 2 * 60 * 60;  // default offset is 02:00:00
-    if (*p == '/') p = ParseOffset(p + 1, -167, 167, 1, &res->time.offset);
-  }
-  return p;
-}
-
-}  // namespace
-
-// spec = std offset [ dst [ offset ] , datetime , datetime ]
-bool ParsePosixSpec(const std::string& spec, PosixTimeZone* res) {
-  const char* p = spec.c_str();
-  if (*p == ':') return false;
-
-  p = ParseAbbr(p, &res->std_abbr);
-  p = ParseOffset(p, 0, 24, -1, &res->std_offset);
-  if (p == nullptr) return false;
-  if (*p == '\0') return true;
-
-  p = ParseAbbr(p, &res->dst_abbr);
-  if (p == nullptr) return false;
-  res->dst_offset = res->std_offset + (60 * 60);  // default
-  if (*p != ',') p = ParseOffset(p, 0, 24, -1, &res->dst_offset);
-
-  p = ParseDateTime(p, &res->dst_start);
-  p = ParseDateTime(p, &res->dst_end);
-
-  return p != nullptr && *p == '\0';
-}
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/src/time_zone_posix.h b/third_party/abseil/absl/time/internal/cctz/src/time_zone_posix.h
deleted file mode 100644
index 0cf2905..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/time_zone_posix.h
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-// Parsing of a POSIX zone spec as described in the TZ part of section 8.3 in
-// http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap08.html.
-//
-// The current POSIX spec for America/Los_Angeles is "PST8PDT,M3.2.0,M11.1.0",
-// which would be broken down as ...
-//
-//   PosixTimeZone {
-//     std_abbr = "PST"
-//     std_offset = -28800
-//     dst_abbr = "PDT"
-//     dst_offset = -25200
-//     dst_start = PosixTransition {
-//       date {
-//         m {
-//           month = 3
-//           week = 2
-//           weekday = 0
-//         }
-//       }
-//       time {
-//         offset = 7200
-//       }
-//     }
-//     dst_end = PosixTransition {
-//       date {
-//         m {
-//           month = 11
-//           week = 1
-//           weekday = 0
-//         }
-//       }
-//       time {
-//         offset = 7200
-//       }
-//     }
-//   }
-
-#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_POSIX_H_
-#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_POSIX_H_
-
-#include <cstdint>
-#include <string>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// The date/time of the transition. The date is specified as either:
-// (J) the Nth day of the year (1 <= N <= 365), excluding leap days, or
-// (N) the Nth day of the year (0 <= N <= 365), including leap days, or
-// (M) the Nth weekday of a month (e.g., the 2nd Sunday in March).
-// The time, specified as a day offset, identifies the particular moment
-// of the transition, and may be negative or >= 24h, and in which case
-// it would take us to another day, and perhaps week, or even month.
-struct PosixTransition {
-  enum DateFormat { J, N, M };
-
-  struct Date {
-    struct NonLeapDay {
-      std::int_fast16_t day;  // day of non-leap year [1:365]
-    };
-    struct Day {
-      std::int_fast16_t day;  // day of year [0:365]
-    };
-    struct MonthWeekWeekday {
-      std::int_fast8_t month;    // month of year [1:12]
-      std::int_fast8_t week;     // week of month [1:5] (5==last)
-      std::int_fast8_t weekday;  // 0==Sun, ..., 6=Sat
-    };
-
-    DateFormat fmt;
-
-    union {
-      NonLeapDay j;
-      Day n;
-      MonthWeekWeekday m;
-    };
-  };
-
-  struct Time {
-    std::int_fast32_t offset;  // seconds before/after 00:00:00
-  };
-
-  Date date;
-  Time time;
-};
-
-// The entirety of a POSIX-string specified time-zone rule. The standard
-// abbreviation and offset are always given. If the time zone includes
-// daylight saving, then the daylight abbrevation is non-empty and the
-// remaining fields are also valid. Note that the start/end transitions
-// are not ordered---in the southern hemisphere the transition to end
-// daylight time occurs first in any particular year.
-struct PosixTimeZone {
-  std::string std_abbr;
-  std::int_fast32_t std_offset;
-
-  std::string dst_abbr;
-  std::int_fast32_t dst_offset;
-  PosixTransition dst_start;
-  PosixTransition dst_end;
-};
-
-// Breaks down a POSIX time-zone specification into its constituent pieces,
-// filling in any missing values (DST offset, or start/end transition times)
-// with the standard-defined defaults. Returns false if the specification
-// could not be parsed (although some fields of *res may have been altered).
-bool ParsePosixSpec(const std::string& spec, PosixTimeZone* res);
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_POSIX_H_
diff --git a/third_party/abseil/absl/time/internal/cctz/src/tzfile.h b/third_party/abseil/absl/time/internal/cctz/src/tzfile.h
deleted file mode 100644
index 269fa36..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/tzfile.h
+++ /dev/null
@@ -1,122 +0,0 @@
-/* Layout and location of TZif files.  */
-
-#ifndef TZFILE_H
-
-#define TZFILE_H
-
-/*
-** This file is in the public domain, so clarified as of
-** 1996-06-05 by Arthur David Olson.
-*/
-
-/*
-** This header is for use ONLY with the time conversion code.
-** There is no guarantee that it will remain unchanged,
-** or that it will remain at all.
-** Do NOT copy it to any system include directory.
-** Thank you!
-*/
-
-/*
-** Information about time zone files.
-*/
-
-#ifndef TZDIR
-#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */
-#endif                              /* !defined TZDIR */
-
-#ifndef TZDEFAULT
-#define TZDEFAULT "/etc/localtime"
-#endif /* !defined TZDEFAULT */
-
-#ifndef TZDEFRULES
-#define TZDEFRULES "posixrules"
-#endif /* !defined TZDEFRULES */
-
-/* See Internet RFC 8536 for more details about the following format.  */
-
-/*
-** Each file begins with. . .
-*/
-
-#define TZ_MAGIC "TZif"
-
-struct tzhead {
-  char tzh_magic[4];      /* TZ_MAGIC */
-  char tzh_version[1];    /* '\0' or '2' or '3' as of 2013 */
-  char tzh_reserved[15];  /* reserved; must be zero */
-  char tzh_ttisutcnt[4];  /* coded number of trans. time flags */
-  char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
-  char tzh_leapcnt[4];    /* coded number of leap seconds */
-  char tzh_timecnt[4];    /* coded number of transition times */
-  char tzh_typecnt[4];    /* coded number of local time types */
-  char tzh_charcnt[4];    /* coded number of abbr. chars */
-};
-
-/*
-** . . .followed by. . .
-**
-**	tzh_timecnt (char [4])s		coded transition times a la time(2)
-**	tzh_timecnt (unsigned char)s	types of local time starting at above
-**	tzh_typecnt repetitions of
-**		one (char [4])		coded UT offset in seconds
-**		one (unsigned char)	used to set tm_isdst
-**		one (unsigned char)	that's an abbreviation list index
-**	tzh_charcnt (char)s		'\0'-terminated zone abbreviations
-**	tzh_leapcnt repetitions of
-**		one (char [4])		coded leap second transition times
-**		one (char [4])		total correction after above
-**	tzh_ttisstdcnt (char)s		indexed by type; if 1, transition
-**					time is standard time, if 0,
-**					transition time is local (wall clock)
-**					time; if absent, transition times are
-**					assumed to be local time
-**	tzh_ttisutcnt (char)s		indexed by type; if 1, transition
-**					time is UT, if 0, transition time is
-**					local time; if absent, transition
-**					times are assumed to be local time.
-**					When this is 1, the corresponding
-**					std/wall indicator must also be 1.
-*/
-
-/*
-** If tzh_version is '2' or greater, the above is followed by a second instance
-** of tzhead and a second instance of the data in which each coded transition
-** time uses 8 rather than 4 chars,
-** then a POSIX-TZ-environment-variable-style string for use in handling
-** instants after the last transition time stored in the file
-** (with nothing between the newlines if there is no POSIX representation for
-** such instants).
-**
-** If tz_version is '3' or greater, the above is extended as follows.
-** First, the POSIX TZ string's hour offset may range from -167
-** through 167 as compared to the POSIX-required 0 through 24.
-** Second, its DST start time may be January 1 at 00:00 and its stop
-** time December 31 at 24:00 plus the difference between DST and
-** standard time, indicating DST all year.
-*/
-
-/*
-** In the current implementation, "tzset()" refuses to deal with files that
-** exceed any of the limits below.
-*/
-
-#ifndef TZ_MAX_TIMES
-#define TZ_MAX_TIMES 2000
-#endif /* !defined TZ_MAX_TIMES */
-
-#ifndef TZ_MAX_TYPES
-/* This must be at least 17 for Europe/Samara and Europe/Vilnius.  */
-#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
-#endif                   /* !defined TZ_MAX_TYPES */
-
-#ifndef TZ_MAX_CHARS
-#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
-                        /* (limited by what unsigned chars can hold) */
-#endif                  /* !defined TZ_MAX_CHARS */
-
-#ifndef TZ_MAX_LEAPS
-#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
-#endif                  /* !defined TZ_MAX_LEAPS */
-
-#endif /* !defined TZFILE_H */
diff --git a/third_party/abseil/absl/time/internal/cctz/src/zone_info_source.cc b/third_party/abseil/absl/time/internal/cctz/src/zone_info_source.cc
deleted file mode 100644
index 7209533..0000000
--- a/third_party/abseil/absl/time/internal/cctz/src/zone_info_source.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2016 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   https://www.apache.org/licenses/LICENSE-2.0
-//
-//   Unless required by applicable law or agreed to in writing, software
-//   distributed under the License is distributed on an "AS IS" BASIS,
-//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//   See the License for the specific language governing permissions and
-//   limitations under the License.
-
-#include "absl/time/internal/cctz/include/cctz/zone_info_source.h"
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz {
-
-// Defined out-of-line to avoid emitting a weak vtable in all TUs.
-ZoneInfoSource::~ZoneInfoSource() {}
-std::string ZoneInfoSource::Version() const { return std::string(); }
-
-}  // namespace cctz
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz_extension {
-
-namespace {
-
-// A default for cctz_extension::zone_info_source_factory, which simply
-// defers to the fallback factory.
-std::unique_ptr<absl::time_internal::cctz::ZoneInfoSource> DefaultFactory(
-    const std::string& name,
-    const std::function<
-        std::unique_ptr<absl::time_internal::cctz::ZoneInfoSource>(
-            const std::string& name)>& fallback_factory) {
-  return fallback_factory(name);
-}
-
-}  // namespace
-
-// A "weak" definition for cctz_extension::zone_info_source_factory.
-// The user may override this with their own "strong" definition (see
-// zone_info_source.h).
-#if !defined(__has_attribute)
-#define __has_attribute(x) 0
-#endif
-// MinGW is GCC on Windows, so while it asserts __has_attribute(weak), the
-// Windows linker cannot handle that. Nor does the MinGW compiler know how to
-// pass "#pragma comment(linker, ...)" to the Windows linker.
-#if (__has_attribute(weak) || defined(__GNUC__)) && !defined(__MINGW32__)
-ZoneInfoSourceFactory zone_info_source_factory __attribute__((weak)) =
-    DefaultFactory;
-#elif defined(_MSC_VER) && !defined(__MINGW32__) && !defined(_LIBCPP_VERSION)
-extern ZoneInfoSourceFactory zone_info_source_factory;
-extern ZoneInfoSourceFactory default_factory;
-ZoneInfoSourceFactory default_factory = DefaultFactory;
-#if defined(_M_IX86)
-#pragma comment(                                                                                                         \
-    linker,                                                                                                              \
-    "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                    \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZA")
-#elif defined(_M_IA_64) || defined(_M_AMD64) || defined(_M_ARM) || \
-    defined(_M_ARM64)
-#pragma comment(                                                                                                          \
-    linker,                                                                                                               \
-    "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                     \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZEA")
-#else
-#error Unsupported MSVC platform
-#endif  // _M_<PLATFORM>
-#else
-// Make it a "strong" definition if we have no other choice.
-ZoneInfoSourceFactory zone_info_source_factory = DefaultFactory;
-#endif
-
-}  // namespace cctz_extension
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/README.zoneinfo b/third_party/abseil/absl/time/internal/cctz/testdata/README.zoneinfo
deleted file mode 100644
index 95fb4a9..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/README.zoneinfo
+++ /dev/null
@@ -1,37 +0,0 @@
-testdata/zoneinfo contains time-zone data files that may be used with CCTZ.
-Install them in a location referenced by the ${TZDIR} environment variable.
-Symbolic and hard links have been eliminated for portability.
-
-On Linux systems the distribution's versions of these files can probably
-already be found in the default ${TZDIR} location, /usr/share/zoneinfo.
-
-New versions can be generated using the following shell script.
-
-  #!/bin/sh -
-  set -e
-  DESTDIR=$(mktemp -d)
-  trap "rm -fr ${DESTDIR}" 0 2 15
-  (
-    cd ${DESTDIR}
-    git clone https://github.com/eggert/tz.git
-    make --directory=tz \
-        install DESTDIR=${DESTDIR} \
-                DATAFORM=vanguard \
-                TZDIR=/zoneinfo \
-                REDO=posix_only \
-                LOCALTIME=Factory \
-                TZDATA_TEXT= \
-                ZONETABLES=zone1970.tab
-    tar --create --dereference --hard-dereference --file tzfile.tar \
-        --directory=tz tzfile.h
-    tar --create --dereference --hard-dereference --file zoneinfo.tar \
-        --exclude=zoneinfo/posixrules zoneinfo \
-        --directory=tz version
-  )
-  tar --extract --directory src --file ${DESTDIR}/tzfile.tar
-  tar --extract --directory testdata --file ${DESTDIR}/zoneinfo.tar
-  exit 0
-
-To run the CCTZ tests using the testdata/zoneinfo files, execute:
-
-  bazel test --test_env=TZDIR=${PWD}/testdata/zoneinfo ...
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/version b/third_party/abseil/absl/time/internal/cctz/testdata/version
deleted file mode 100644
index b4410dc..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/version
+++ /dev/null
@@ -1 +0,0 @@
-2020d
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Abidjan b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Abidjan
deleted file mode 100644
index 8906e88..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Abidjan
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra
deleted file mode 100644
index 9ca907b..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Accra
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa
deleted file mode 100644
index d3c0bb3..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Addis_Ababa
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Algiers b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Algiers
deleted file mode 100644
index 56a4dd2..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Algiers
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara
deleted file mode 100644
index d3c0bb3..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmara
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera
deleted file mode 100644
index d3c0bb3..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Asmera
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako
deleted file mode 100644
index 8906e88..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bamako
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui
deleted file mode 100644
index 2f2ce2f..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Bangui
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul
deleted file mode 100644
index 8906e88..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/Africa/Banjul
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diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/iso3166.tab
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@@ -1,274 +0,0 @@
-# ISO 3166 alpha-2 country codes
-#
-# This file is in the public domain, so clarified as of
-# 2009-05-17 by Arthur David Olson.
-#
-# From Paul Eggert (2015-05-02):
-# This file contains a table of two-letter country codes.  Columns are
-# separated by a single tab.  Lines beginning with '#' are comments.
-# All text uses UTF-8 encoding.  The columns of the table are as follows:
-#
-# 1.  ISO 3166-1 alpha-2 country code, current as of
-#     ISO 3166-1 N976 (2018-11-06).  See: Updates on ISO 3166-1
-#     https://isotc.iso.org/livelink/livelink/Open/16944257
-# 2.  The usual English name for the coded region,
-#     chosen so that alphabetic sorting of subsets produces helpful lists.
-#     This is not the same as the English name in the ISO 3166 tables.
-#
-# The table is sorted by country code.
-#
-# This table is intended as an aid for users, to help them select time
-# zone data appropriate for their practical needs.  It is not intended
-# to take or endorse any position on legal or territorial claims.
-#
-#country-
-#code	name of country, territory, area, or subdivision
-AD	Andorra
-AE	United Arab Emirates
-AF	Afghanistan
-AG	Antigua & Barbuda
-AI	Anguilla
-AL	Albania
-AM	Armenia
-AO	Angola
-AQ	Antarctica
-AR	Argentina
-AS	Samoa (American)
-AT	Austria
-AU	Australia
-AW	Aruba
-AX	Åland Islands
-AZ	Azerbaijan
-BA	Bosnia & Herzegovina
-BB	Barbados
-BD	Bangladesh
-BE	Belgium
-BF	Burkina Faso
-BG	Bulgaria
-BH	Bahrain
-BI	Burundi
-BJ	Benin
-BL	St Barthelemy
-BM	Bermuda
-BN	Brunei
-BO	Bolivia
-BQ	Caribbean NL
-BR	Brazil
-BS	Bahamas
-BT	Bhutan
-BV	Bouvet Island
-BW	Botswana
-BY	Belarus
-BZ	Belize
-CA	Canada
-CC	Cocos (Keeling) Islands
-CD	Congo (Dem. Rep.)
-CF	Central African Rep.
-CG	Congo (Rep.)
-CH	Switzerland
-CI	Côte d'Ivoire
-CK	Cook Islands
-CL	Chile
-CM	Cameroon
-CN	China
-CO	Colombia
-CR	Costa Rica
-CU	Cuba
-CV	Cape Verde
-CW	Curaçao
-CX	Christmas Island
-CY	Cyprus
-CZ	Czech Republic
-DE	Germany
-DJ	Djibouti
-DK	Denmark
-DM	Dominica
-DO	Dominican Republic
-DZ	Algeria
-EC	Ecuador
-EE	Estonia
-EG	Egypt
-EH	Western Sahara
-ER	Eritrea
-ES	Spain
-ET	Ethiopia
-FI	Finland
-FJ	Fiji
-FK	Falkland Islands
-FM	Micronesia
-FO	Faroe Islands
-FR	France
-GA	Gabon
-GB	Britain (UK)
-GD	Grenada
-GE	Georgia
-GF	French Guiana
-GG	Guernsey
-GH	Ghana
-GI	Gibraltar
-GL	Greenland
-GM	Gambia
-GN	Guinea
-GP	Guadeloupe
-GQ	Equatorial Guinea
-GR	Greece
-GS	South Georgia & the South Sandwich Islands
-GT	Guatemala
-GU	Guam
-GW	Guinea-Bissau
-GY	Guyana
-HK	Hong Kong
-HM	Heard Island & McDonald Islands
-HN	Honduras
-HR	Croatia
-HT	Haiti
-HU	Hungary
-ID	Indonesia
-IE	Ireland
-IL	Israel
-IM	Isle of Man
-IN	India
-IO	British Indian Ocean Territory
-IQ	Iraq
-IR	Iran
-IS	Iceland
-IT	Italy
-JE	Jersey
-JM	Jamaica
-JO	Jordan
-JP	Japan
-KE	Kenya
-KG	Kyrgyzstan
-KH	Cambodia
-KI	Kiribati
-KM	Comoros
-KN	St Kitts & Nevis
-KP	Korea (North)
-KR	Korea (South)
-KW	Kuwait
-KY	Cayman Islands
-KZ	Kazakhstan
-LA	Laos
-LB	Lebanon
-LC	St Lucia
-LI	Liechtenstein
-LK	Sri Lanka
-LR	Liberia
-LS	Lesotho
-LT	Lithuania
-LU	Luxembourg
-LV	Latvia
-LY	Libya
-MA	Morocco
-MC	Monaco
-MD	Moldova
-ME	Montenegro
-MF	St Martin (French)
-MG	Madagascar
-MH	Marshall Islands
-MK	North Macedonia
-ML	Mali
-MM	Myanmar (Burma)
-MN	Mongolia
-MO	Macau
-MP	Northern Mariana Islands
-MQ	Martinique
-MR	Mauritania
-MS	Montserrat
-MT	Malta
-MU	Mauritius
-MV	Maldives
-MW	Malawi
-MX	Mexico
-MY	Malaysia
-MZ	Mozambique
-NA	Namibia
-NC	New Caledonia
-NE	Niger
-NF	Norfolk Island
-NG	Nigeria
-NI	Nicaragua
-NL	Netherlands
-NO	Norway
-NP	Nepal
-NR	Nauru
-NU	Niue
-NZ	New Zealand
-OM	Oman
-PA	Panama
-PE	Peru
-PF	French Polynesia
-PG	Papua New Guinea
-PH	Philippines
-PK	Pakistan
-PL	Poland
-PM	St Pierre & Miquelon
-PN	Pitcairn
-PR	Puerto Rico
-PS	Palestine
-PT	Portugal
-PW	Palau
-PY	Paraguay
-QA	Qatar
-RE	Réunion
-RO	Romania
-RS	Serbia
-RU	Russia
-RW	Rwanda
-SA	Saudi Arabia
-SB	Solomon Islands
-SC	Seychelles
-SD	Sudan
-SE	Sweden
-SG	Singapore
-SH	St Helena
-SI	Slovenia
-SJ	Svalbard & Jan Mayen
-SK	Slovakia
-SL	Sierra Leone
-SM	San Marino
-SN	Senegal
-SO	Somalia
-SR	Suriname
-SS	South Sudan
-ST	Sao Tome & Principe
-SV	El Salvador
-SX	St Maarten (Dutch)
-SY	Syria
-SZ	Eswatini (Swaziland)
-TC	Turks & Caicos Is
-TD	Chad
-TF	French Southern & Antarctic Lands
-TG	Togo
-TH	Thailand
-TJ	Tajikistan
-TK	Tokelau
-TL	East Timor
-TM	Turkmenistan
-TN	Tunisia
-TO	Tonga
-TR	Turkey
-TT	Trinidad & Tobago
-TV	Tuvalu
-TW	Taiwan
-TZ	Tanzania
-UA	Ukraine
-UG	Uganda
-UM	US minor outlying islands
-US	United States
-UY	Uruguay
-UZ	Uzbekistan
-VA	Vatican City
-VC	St Vincent
-VE	Venezuela
-VG	Virgin Islands (UK)
-VI	Virgin Islands (US)
-VN	Vietnam
-VU	Vanuatu
-WF	Wallis & Futuna
-WS	Samoa (western)
-YE	Yemen
-YT	Mayotte
-ZA	South Africa
-ZM	Zambia
-ZW	Zimbabwe
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/localtime b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/localtime
deleted file mode 100644
index afeeb88..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/localtime
+++ /dev/null
Binary files differ
diff --git a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab b/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
deleted file mode 100644
index 53ee77e..0000000
--- a/third_party/abseil/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
+++ /dev/null
@@ -1,384 +0,0 @@
-# tzdb timezone descriptions
-#
-# This file is in the public domain.
-#
-# From Paul Eggert (2018-06-27):
-# This file contains a table where each row stands for a timezone where
-# civil timestamps have agreed since 1970.  Columns are separated by
-# a single tab.  Lines beginning with '#' are comments.  All text uses
-# UTF-8 encoding.  The columns of the table are as follows:
-#
-# 1.  The countries that overlap the timezone, as a comma-separated list
-#     of ISO 3166 2-character country codes.  See the file 'iso3166.tab'.
-# 2.  Latitude and longitude of the timezone's principal location
-#     in ISO 6709 sign-degrees-minutes-seconds format,
-#     either ±DDMM±DDDMM or ±DDMMSS±DDDMMSS,
-#     first latitude (+ is north), then longitude (+ is east).
-# 3.  Timezone name used in value of TZ environment variable.
-#     Please see the theory.html file for how these names are chosen.
-#     If multiple timezones overlap a country, each has a row in the
-#     table, with each column 1 containing the country code.
-# 4.  Comments; present if and only if a country has multiple timezones.
-#
-# If a timezone covers multiple countries, the most-populous city is used,
-# and that country is listed first in column 1; any other countries
-# are listed alphabetically by country code.  The table is sorted
-# first by country code, then (if possible) by an order within the
-# country that (1) makes some geographical sense, and (2) puts the
-# most populous timezones first, where that does not contradict (1).
-#
-# This table is intended as an aid for users, to help them select timezones
-# appropriate for their practical needs.  It is not intended to take or
-# endorse any position on legal or territorial claims.
-#
-#country-
-#codes	coordinates	TZ	comments
-AD	+4230+00131	Europe/Andorra
-AE,OM	+2518+05518	Asia/Dubai
-AF	+3431+06912	Asia/Kabul
-AL	+4120+01950	Europe/Tirane
-AM	+4011+04430	Asia/Yerevan
-AQ	-6617+11031	Antarctica/Casey	Casey
-AQ	-6835+07758	Antarctica/Davis	Davis
-AQ	-6640+14001	Antarctica/DumontDUrville	Dumont-d'Urville
-AQ	-6736+06253	Antarctica/Mawson	Mawson
-AQ	-6448-06406	Antarctica/Palmer	Palmer
-AQ	-6734-06808	Antarctica/Rothera	Rothera
-AQ	-690022+0393524	Antarctica/Syowa	Syowa
-AQ	-720041+0023206	Antarctica/Troll	Troll
-AQ	-7824+10654	Antarctica/Vostok	Vostok
-AR	-3436-05827	America/Argentina/Buenos_Aires	Buenos Aires (BA, CF)
-AR	-3124-06411	America/Argentina/Cordoba	Argentina (most areas: CB, CC, CN, ER, FM, MN, SE, SF)
-AR	-2447-06525	America/Argentina/Salta	Salta (SA, LP, NQ, RN)
-AR	-2411-06518	America/Argentina/Jujuy	Jujuy (JY)
-AR	-2649-06513	America/Argentina/Tucuman	Tucumán (TM)
-AR	-2828-06547	America/Argentina/Catamarca	Catamarca (CT); Chubut (CH)
-AR	-2926-06651	America/Argentina/La_Rioja	La Rioja (LR)
-AR	-3132-06831	America/Argentina/San_Juan	San Juan (SJ)
-AR	-3253-06849	America/Argentina/Mendoza	Mendoza (MZ)
-AR	-3319-06621	America/Argentina/San_Luis	San Luis (SL)
-AR	-5138-06913	America/Argentina/Rio_Gallegos	Santa Cruz (SC)
-AR	-5448-06818	America/Argentina/Ushuaia	Tierra del Fuego (TF)
-AS,UM	-1416-17042	Pacific/Pago_Pago	Samoa, Midway
-AT	+4813+01620	Europe/Vienna
-AU	-3133+15905	Australia/Lord_Howe	Lord Howe Island
-AU	-5430+15857	Antarctica/Macquarie	Macquarie Island
-AU	-4253+14719	Australia/Hobart	Tasmania (most areas)
-AU	-3956+14352	Australia/Currie	Tasmania (King Island)
-AU	-3749+14458	Australia/Melbourne	Victoria
-AU	-3352+15113	Australia/Sydney	New South Wales (most areas)
-AU	-3157+14127	Australia/Broken_Hill	New South Wales (Yancowinna)
-AU	-2728+15302	Australia/Brisbane	Queensland (most areas)
-AU	-2016+14900	Australia/Lindeman	Queensland (Whitsunday Islands)
-AU	-3455+13835	Australia/Adelaide	South Australia
-AU	-1228+13050	Australia/Darwin	Northern Territory
-AU	-3157+11551	Australia/Perth	Western Australia (most areas)
-AU	-3143+12852	Australia/Eucla	Western Australia (Eucla)
-AZ	+4023+04951	Asia/Baku
-BB	+1306-05937	America/Barbados
-BD	+2343+09025	Asia/Dhaka
-BE	+5050+00420	Europe/Brussels
-BG	+4241+02319	Europe/Sofia
-BM	+3217-06446	Atlantic/Bermuda
-BN	+0456+11455	Asia/Brunei
-BO	-1630-06809	America/La_Paz
-BR	-0351-03225	America/Noronha	Atlantic islands
-BR	-0127-04829	America/Belem	Pará (east); Amapá
-BR	-0343-03830	America/Fortaleza	Brazil (northeast: MA, PI, CE, RN, PB)
-BR	-0803-03454	America/Recife	Pernambuco
-BR	-0712-04812	America/Araguaina	Tocantins
-BR	-0940-03543	America/Maceio	Alagoas, Sergipe
-BR	-1259-03831	America/Bahia	Bahia
-BR	-2332-04637	America/Sao_Paulo	Brazil (southeast: GO, DF, MG, ES, RJ, SP, PR, SC, RS)
-BR	-2027-05437	America/Campo_Grande	Mato Grosso do Sul
-BR	-1535-05605	America/Cuiaba	Mato Grosso
-BR	-0226-05452	America/Santarem	Pará (west)
-BR	-0846-06354	America/Porto_Velho	Rondônia
-BR	+0249-06040	America/Boa_Vista	Roraima
-BR	-0308-06001	America/Manaus	Amazonas (east)
-BR	-0640-06952	America/Eirunepe	Amazonas (west)
-BR	-0958-06748	America/Rio_Branco	Acre
-BS	+2505-07721	America/Nassau
-BT	+2728+08939	Asia/Thimphu
-BY	+5354+02734	Europe/Minsk
-BZ	+1730-08812	America/Belize
-CA	+4734-05243	America/St_Johns	Newfoundland; Labrador (southeast)
-CA	+4439-06336	America/Halifax	Atlantic - NS (most areas); PE
-CA	+4612-05957	America/Glace_Bay	Atlantic - NS (Cape Breton)
-CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
-CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
-CA	+5125-05707	America/Blanc-Sablon	AST - QC (Lower North Shore)
-CA	+4339-07923	America/Toronto	Eastern - ON, QC (most areas)
-CA	+4901-08816	America/Nipigon	Eastern - ON, QC (no DST 1967-73)
-CA	+4823-08915	America/Thunder_Bay	Eastern - ON (Thunder Bay)
-CA	+6344-06828	America/Iqaluit	Eastern - NU (most east areas)
-CA	+6608-06544	America/Pangnirtung	Eastern - NU (Pangnirtung)
-CA	+484531-0913718	America/Atikokan	EST - ON (Atikokan); NU (Coral H)
-CA	+4953-09709	America/Winnipeg	Central - ON (west); Manitoba
-CA	+4843-09434	America/Rainy_River	Central - ON (Rainy R, Ft Frances)
-CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
-CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
-CA	+5024-10439	America/Regina	CST - SK (most areas)
-CA	+5017-10750	America/Swift_Current	CST - SK (midwest)
-CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); SK (W)
-CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
-CA	+6227-11421	America/Yellowknife	Mountain - NT (central)
-CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
-CA	+4906-11631	America/Creston	MST - BC (Creston)
-CA	+5946-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
-CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
-CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
-CA	+6043-13503	America/Whitehorse	Pacific - Yukon (east)
-CA	+6404-13925	America/Dawson	Pacific - Yukon (west)
-CC	-1210+09655	Indian/Cocos
-CH,DE,LI	+4723+00832	Europe/Zurich	Swiss time
-CI,BF,GM,GN,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
-CK	-2114-15946	Pacific/Rarotonga
-CL	-3327-07040	America/Santiago	Chile (most areas)
-CL	-5309-07055	America/Punta_Arenas	Region of Magallanes
-CL	-2709-10926	Pacific/Easter	Easter Island
-CN	+3114+12128	Asia/Shanghai	Beijing Time
-CN	+4348+08735	Asia/Urumqi	Xinjiang Time
-CO	+0436-07405	America/Bogota
-CR	+0956-08405	America/Costa_Rica
-CU	+2308-08222	America/Havana
-CV	+1455-02331	Atlantic/Cape_Verde
-CW,AW,BQ,SX	+1211-06900	America/Curacao
-CX	-1025+10543	Indian/Christmas
-CY	+3510+03322	Asia/Nicosia	Cyprus (most areas)
-CY	+3507+03357	Asia/Famagusta	Northern Cyprus
-CZ,SK	+5005+01426	Europe/Prague
-DE	+5230+01322	Europe/Berlin	Germany (most areas)
-DK	+5540+01235	Europe/Copenhagen
-DO	+1828-06954	America/Santo_Domingo
-DZ	+3647+00303	Africa/Algiers
-EC	-0210-07950	America/Guayaquil	Ecuador (mainland)
-EC	-0054-08936	Pacific/Galapagos	Galápagos Islands
-EE	+5925+02445	Europe/Tallinn
-EG	+3003+03115	Africa/Cairo
-EH	+2709-01312	Africa/El_Aaiun
-ES	+4024-00341	Europe/Madrid	Spain (mainland)
-ES	+3553-00519	Africa/Ceuta	Ceuta, Melilla
-ES	+2806-01524	Atlantic/Canary	Canary Islands
-FI,AX	+6010+02458	Europe/Helsinki
-FJ	-1808+17825	Pacific/Fiji
-FK	-5142-05751	Atlantic/Stanley
-FM	+0725+15147	Pacific/Chuuk	Chuuk/Truk, Yap
-FM	+0658+15813	Pacific/Pohnpei	Pohnpei/Ponape
-FM	+0519+16259	Pacific/Kosrae	Kosrae
-FO	+6201-00646	Atlantic/Faroe
-FR	+4852+00220	Europe/Paris
-GB,GG,IM,JE	+513030-0000731	Europe/London
-GE	+4143+04449	Asia/Tbilisi
-GF	+0456-05220	America/Cayenne
-GH	+0533-00013	Africa/Accra
-GI	+3608-00521	Europe/Gibraltar
-GL	+6411-05144	America/Nuuk	Greenland (most areas)
-GL	+7646-01840	America/Danmarkshavn	National Park (east coast)
-GL	+7029-02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit
-GL	+7634-06847	America/Thule	Thule/Pituffik
-GR	+3758+02343	Europe/Athens
-GS	-5416-03632	Atlantic/South_Georgia
-GT	+1438-09031	America/Guatemala
-GU,MP	+1328+14445	Pacific/Guam
-GW	+1151-01535	Africa/Bissau
-GY	+0648-05810	America/Guyana
-HK	+2217+11409	Asia/Hong_Kong
-HN	+1406-08713	America/Tegucigalpa
-HT	+1832-07220	America/Port-au-Prince
-HU	+4730+01905	Europe/Budapest
-ID	-0610+10648	Asia/Jakarta	Java, Sumatra
-ID	-0002+10920	Asia/Pontianak	Borneo (west, central)
-ID	-0507+11924	Asia/Makassar	Borneo (east, south); Sulawesi/Celebes, Bali, Nusa Tengarra; Timor (west)
-ID	-0232+14042	Asia/Jayapura	New Guinea (West Papua / Irian Jaya); Malukus/Moluccas
-IE	+5320-00615	Europe/Dublin
-IL	+314650+0351326	Asia/Jerusalem
-IN	+2232+08822	Asia/Kolkata
-IO	-0720+07225	Indian/Chagos
-IQ	+3321+04425	Asia/Baghdad
-IR	+3540+05126	Asia/Tehran
-IS	+6409-02151	Atlantic/Reykjavik
-IT,SM,VA	+4154+01229	Europe/Rome
-JM	+175805-0764736	America/Jamaica
-JO	+3157+03556	Asia/Amman
-JP	+353916+1394441	Asia/Tokyo
-KE,DJ,ER,ET,KM,MG,SO,TZ,UG,YT	-0117+03649	Africa/Nairobi
-KG	+4254+07436	Asia/Bishkek
-KI	+0125+17300	Pacific/Tarawa	Gilbert Islands
-KI	-0308-17105	Pacific/Enderbury	Phoenix Islands
-KI	+0152-15720	Pacific/Kiritimati	Line Islands
-KP	+3901+12545	Asia/Pyongyang
-KR	+3733+12658	Asia/Seoul
-KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
-KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
-KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
-KZ	+5017+05710	Asia/Aqtobe	Aqtöbe/Aktobe
-KZ	+4431+05016	Asia/Aqtau	Mangghystaū/Mankistau
-KZ	+4707+05156	Asia/Atyrau	Atyraū/Atirau/Gur'yev
-KZ	+5113+05121	Asia/Oral	West Kazakhstan
-LB	+3353+03530	Asia/Beirut
-LK	+0656+07951	Asia/Colombo
-LR	+0618-01047	Africa/Monrovia
-LT	+5441+02519	Europe/Vilnius
-LU	+4936+00609	Europe/Luxembourg
-LV	+5657+02406	Europe/Riga
-LY	+3254+01311	Africa/Tripoli
-MA	+3339-00735	Africa/Casablanca
-MC	+4342+00723	Europe/Monaco
-MD	+4700+02850	Europe/Chisinau
-MH	+0709+17112	Pacific/Majuro	Marshall Islands (most areas)
-MH	+0905+16720	Pacific/Kwajalein	Kwajalein
-MM	+1647+09610	Asia/Yangon
-MN	+4755+10653	Asia/Ulaanbaatar	Mongolia (most areas)
-MN	+4801+09139	Asia/Hovd	Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan
-MN	+4804+11430	Asia/Choibalsan	Dornod, Sükhbaatar
-MO	+221150+1133230	Asia/Macau
-MQ	+1436-06105	America/Martinique
-MT	+3554+01431	Europe/Malta
-MU	-2010+05730	Indian/Mauritius
-MV	+0410+07330	Indian/Maldives
-MX	+1924-09909	America/Mexico_City	Central Time
-MX	+2105-08646	America/Cancun	Eastern Standard Time - Quintana Roo
-MX	+2058-08937	America/Merida	Central Time - Campeche, Yucatán
-MX	+2540-10019	America/Monterrey	Central Time - Durango; Coahuila, Nuevo León, Tamaulipas (most areas)
-MX	+2550-09730	America/Matamoros	Central Time US - Coahuila, Nuevo León, Tamaulipas (US border)
-MX	+2313-10625	America/Mazatlan	Mountain Time - Baja California Sur, Nayarit, Sinaloa
-MX	+2838-10605	America/Chihuahua	Mountain Time - Chihuahua (most areas)
-MX	+2934-10425	America/Ojinaga	Mountain Time US - Chihuahua (US border)
-MX	+2904-11058	America/Hermosillo	Mountain Standard Time - Sonora
-MX	+3232-11701	America/Tijuana	Pacific Time US - Baja California
-MX	+2048-10515	America/Bahia_Banderas	Central Time - Bahía de Banderas
-MY	+0310+10142	Asia/Kuala_Lumpur	Malaysia (peninsula)
-MY	+0133+11020	Asia/Kuching	Sabah, Sarawak
-MZ,BI,BW,CD,MW,RW,ZM,ZW	-2558+03235	Africa/Maputo	Central Africa Time
-NA	-2234+01706	Africa/Windhoek
-NC	-2216+16627	Pacific/Noumea
-NF	-2903+16758	Pacific/Norfolk
-NG,AO,BJ,CD,CF,CG,CM,GA,GQ,NE	+0627+00324	Africa/Lagos	West Africa Time
-NI	+1209-08617	America/Managua
-NL	+5222+00454	Europe/Amsterdam
-NO,SJ	+5955+01045	Europe/Oslo
-NP	+2743+08519	Asia/Kathmandu
-NR	-0031+16655	Pacific/Nauru
-NU	-1901-16955	Pacific/Niue
-NZ,AQ	-3652+17446	Pacific/Auckland	New Zealand time
-NZ	-4357-17633	Pacific/Chatham	Chatham Islands
-PA,KY	+0858-07932	America/Panama
-PE	-1203-07703	America/Lima
-PF	-1732-14934	Pacific/Tahiti	Society Islands
-PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
-PF	-2308-13457	Pacific/Gambier	Gambier Islands
-PG	-0930+14710	Pacific/Port_Moresby	Papua New Guinea (most areas)
-PG	-0613+15534	Pacific/Bougainville	Bougainville
-PH	+1435+12100	Asia/Manila
-PK	+2452+06703	Asia/Karachi
-PL	+5215+02100	Europe/Warsaw
-PM	+4703-05620	America/Miquelon
-PN	-2504-13005	Pacific/Pitcairn
-PR	+182806-0660622	America/Puerto_Rico
-PS	+3130+03428	Asia/Gaza	Gaza Strip
-PS	+313200+0350542	Asia/Hebron	West Bank
-PT	+3843-00908	Europe/Lisbon	Portugal (mainland)
-PT	+3238-01654	Atlantic/Madeira	Madeira Islands
-PT	+3744-02540	Atlantic/Azores	Azores
-PW	+0720+13429	Pacific/Palau
-PY	-2516-05740	America/Asuncion
-QA,BH	+2517+05132	Asia/Qatar
-RE,TF	-2052+05528	Indian/Reunion	Réunion, Crozet, Scattered Islands
-RO	+4426+02606	Europe/Bucharest
-RS,BA,HR,ME,MK,SI	+4450+02030	Europe/Belgrade
-RU	+5443+02030	Europe/Kaliningrad	MSK-01 - Kaliningrad
-RU	+554521+0373704	Europe/Moscow	MSK+00 - Moscow area
-# Mention RU and UA alphabetically.  See "territorial claims" above.
-RU,UA	+4457+03406	Europe/Simferopol	Crimea
-RU	+5836+04939	Europe/Kirov	MSK+00 - Kirov
-RU	+4621+04803	Europe/Astrakhan	MSK+01 - Astrakhan
-RU	+4844+04425	Europe/Volgograd	MSK+01 - Volgograd
-RU	+5134+04602	Europe/Saratov	MSK+01 - Saratov
-RU	+5420+04824	Europe/Ulyanovsk	MSK+01 - Ulyanovsk
-RU	+5312+05009	Europe/Samara	MSK+01 - Samara, Udmurtia
-RU	+5651+06036	Asia/Yekaterinburg	MSK+02 - Urals
-RU	+5500+07324	Asia/Omsk	MSK+03 - Omsk
-RU	+5502+08255	Asia/Novosibirsk	MSK+04 - Novosibirsk
-RU	+5322+08345	Asia/Barnaul	MSK+04 - Altai
-RU	+5630+08458	Asia/Tomsk	MSK+04 - Tomsk
-RU	+5345+08707	Asia/Novokuznetsk	MSK+04 - Kemerovo
-RU	+5601+09250	Asia/Krasnoyarsk	MSK+04 - Krasnoyarsk area
-RU	+5216+10420	Asia/Irkutsk	MSK+05 - Irkutsk, Buryatia
-RU	+5203+11328	Asia/Chita	MSK+06 - Zabaykalsky
-RU	+6200+12940	Asia/Yakutsk	MSK+06 - Lena River
-RU	+623923+1353314	Asia/Khandyga	MSK+06 - Tomponsky, Ust-Maysky
-RU	+4310+13156	Asia/Vladivostok	MSK+07 - Amur River
-RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky
-RU	+5934+15048	Asia/Magadan	MSK+08 - Magadan
-RU	+4658+14242	Asia/Sakhalin	MSK+08 - Sakhalin Island
-RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is
-RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
-RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
-SA,KW,YE	+2438+04643	Asia/Riyadh
-SB	-0932+16012	Pacific/Guadalcanal
-SC	-0440+05528	Indian/Mahe
-SD	+1536+03232	Africa/Khartoum
-SE	+5920+01803	Europe/Stockholm
-SG	+0117+10351	Asia/Singapore
-SR	+0550-05510	America/Paramaribo
-SS	+0451+03137	Africa/Juba
-ST	+0020+00644	Africa/Sao_Tome
-SV	+1342-08912	America/El_Salvador
-SY	+3330+03618	Asia/Damascus
-TC	+2128-07108	America/Grand_Turk
-TD	+1207+01503	Africa/Ndjamena
-TF	-492110+0701303	Indian/Kerguelen	Kerguelen, St Paul Island, Amsterdam Island
-TH,KH,LA,VN	+1345+10031	Asia/Bangkok	Indochina (most areas)
-TJ	+3835+06848	Asia/Dushanbe
-TK	-0922-17114	Pacific/Fakaofo
-TL	-0833+12535	Asia/Dili
-TM	+3757+05823	Asia/Ashgabat
-TN	+3648+01011	Africa/Tunis
-TO	-2110-17510	Pacific/Tongatapu
-TR	+4101+02858	Europe/Istanbul
-TT,AG,AI,BL,DM,GD,GP,KN,LC,MF,MS,VC,VG,VI	+1039-06131	America/Port_of_Spain
-TV	-0831+17913	Pacific/Funafuti
-TW	+2503+12130	Asia/Taipei
-UA	+5026+03031	Europe/Kiev	Ukraine (most areas)
-UA	+4837+02218	Europe/Uzhgorod	Transcarpathia
-UA	+4750+03510	Europe/Zaporozhye	Zaporozhye and east Lugansk
-UM	+1917+16637	Pacific/Wake	Wake Island
-US	+404251-0740023	America/New_York	Eastern (most areas)
-US	+421953-0830245	America/Detroit	Eastern - MI (most areas)
-US	+381515-0854534	America/Kentucky/Louisville	Eastern - KY (Louisville area)
-US	+364947-0845057	America/Kentucky/Monticello	Eastern - KY (Wayne)
-US	+394606-0860929	America/Indiana/Indianapolis	Eastern - IN (most areas)
-US	+384038-0873143	America/Indiana/Vincennes	Eastern - IN (Da, Du, K, Mn)
-US	+410305-0863611	America/Indiana/Winamac	Eastern - IN (Pulaski)
-US	+382232-0862041	America/Indiana/Marengo	Eastern - IN (Crawford)
-US	+382931-0871643	America/Indiana/Petersburg	Eastern - IN (Pike)
-US	+384452-0850402	America/Indiana/Vevay	Eastern - IN (Switzerland)
-US	+415100-0873900	America/Chicago	Central (most areas)
-US	+375711-0864541	America/Indiana/Tell_City	Central - IN (Perry)
-US	+411745-0863730	America/Indiana/Knox	Central - IN (Starke)
-US	+450628-0873651	America/Menominee	Central - MI (Wisconsin border)
-US	+470659-1011757	America/North_Dakota/Center	Central - ND (Oliver)
-US	+465042-1012439	America/North_Dakota/New_Salem	Central - ND (Morton rural)
-US	+471551-1014640	America/North_Dakota/Beulah	Central - ND (Mercer)
-US	+394421-1045903	America/Denver	Mountain (most areas)
-US	+433649-1161209	America/Boise	Mountain - ID (south); OR (east)
-US	+332654-1120424	America/Phoenix	MST - Arizona (except Navajo)
-US	+340308-1181434	America/Los_Angeles	Pacific
-US	+611305-1495401	America/Anchorage	Alaska (most areas)
-US	+581807-1342511	America/Juneau	Alaska - Juneau area
-US	+571035-1351807	America/Sitka	Alaska - Sitka area
-US	+550737-1313435	America/Metlakatla	Alaska - Annette Island
-US	+593249-1394338	America/Yakutat	Alaska - Yakutat
-US	+643004-1652423	America/Nome	Alaska (west)
-US	+515248-1763929	America/Adak	Aleutian Islands
-US,UM	+211825-1575130	Pacific/Honolulu	Hawaii
-UY	-345433-0561245	America/Montevideo
-UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
-UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
-VE	+1030-06656	America/Caracas
-VN	+1045+10640	Asia/Ho_Chi_Minh	Vietnam (south)
-VU	-1740+16825	Pacific/Efate
-WF	-1318-17610	Pacific/Wallis
-WS	-1350-17144	Pacific/Apia
-ZA,LS,SZ	-2615+02800	Africa/Johannesburg
diff --git a/third_party/abseil/absl/time/internal/get_current_time_chrono.inc b/third_party/abseil/absl/time/internal/get_current_time_chrono.inc
deleted file mode 100644
index 5eeb640..0000000
--- a/third_party/abseil/absl/time/internal/get_current_time_chrono.inc
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <chrono>
-#include <cstdint>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-
-static int64_t GetCurrentTimeNanosFromSystem() {
-  return std::chrono::duration_cast<std::chrono::nanoseconds>(
-             std::chrono::system_clock::now() -
-             std::chrono::system_clock::from_time_t(0))
-      .count();
-}
-
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/get_current_time_posix.inc b/third_party/abseil/absl/time/internal/get_current_time_posix.inc
deleted file mode 100644
index 4207200..0000000
--- a/third_party/abseil/absl/time/internal/get_current_time_posix.inc
+++ /dev/null
@@ -1,24 +0,0 @@
-#include "absl/time/clock.h"
-
-#include <sys/time.h>
-#include <ctime>
-#include <cstdint>
-
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-
-static int64_t GetCurrentTimeNanosFromSystem() {
-  const int64_t kNanosPerSecond = 1000 * 1000 * 1000;
-  struct timespec ts;
-  ABSL_RAW_CHECK(clock_gettime(CLOCK_REALTIME, &ts) == 0,
-                 "Failed to read real-time clock.");
-  return (int64_t{ts.tv_sec} * kNanosPerSecond +
-          int64_t{ts.tv_nsec});
-}
-
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/test_util.cc b/third_party/abseil/absl/time/internal/test_util.cc
deleted file mode 100644
index 9a485a0..0000000
--- a/third_party/abseil/absl/time/internal/test_util.cc
+++ /dev/null
@@ -1,131 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/internal/test_util.h"
-
-#include <algorithm>
-#include <cstddef>
-#include <cstring>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/time/internal/cctz/include/cctz/zone_info_source.h"
-
-namespace cctz = absl::time_internal::cctz;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-
-TimeZone LoadTimeZone(const std::string& name) {
-  TimeZone tz;
-  ABSL_RAW_CHECK(LoadTimeZone(name, &tz), name.c_str());
-  return tz;
-}
-
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-namespace cctz_extension {
-namespace {
-
-// Embed the zoneinfo data for time zones used during tests and benchmarks.
-// The data was generated using "xxd -i zoneinfo-file".  There is no need
-// to update the data as long as the tests do not depend on recent changes
-// (and the past rules remain the same).
-#include "absl/time/internal/zoneinfo.inc"
-
-const struct ZoneInfo {
-  const char* name;
-  const char* data;
-  std::size_t length;
-} kZoneInfo[] = {
-    // The three real time zones used by :time_test and :time_benchmark.
-    {"America/Los_Angeles",  //
-     reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
-    {"America/New_York",  //
-     reinterpret_cast<char*>(America_New_York), America_New_York_len},
-    {"Australia/Sydney",  //
-     reinterpret_cast<char*>(Australia_Sydney), Australia_Sydney_len},
-
-    // Other zones named in tests but which should fail to load.
-    {"Invalid/TimeZone", nullptr, 0},
-    {"", nullptr, 0},
-
-    // Also allow for loading the local time zone under TZ=US/Pacific.
-    {"US/Pacific",  //
-     reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
-
-    // Allows use of the local time zone from a system-specific location.
-#ifdef _MSC_VER
-    {"localtime",  //
-     reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
-#else
-    {"/etc/localtime",  //
-     reinterpret_cast<char*>(America_Los_Angeles), America_Los_Angeles_len},
-#endif
-};
-
-class TestZoneInfoSource : public cctz::ZoneInfoSource {
- public:
-  TestZoneInfoSource(const char* data, std::size_t size)
-      : data_(data), end_(data + size) {}
-
-  std::size_t Read(void* ptr, std::size_t size) override {
-    const std::size_t len = std::min<std::size_t>(size, end_ - data_);
-    memcpy(ptr, data_, len);
-    data_ += len;
-    return len;
-  }
-
-  int Skip(std::size_t offset) override {
-    data_ += std::min<std::size_t>(offset, end_ - data_);
-    return 0;
-  }
-
- private:
-  const char* data_;
-  const char* const end_;
-};
-
-std::unique_ptr<cctz::ZoneInfoSource> TestFactory(
-    const std::string& name,
-    const std::function<std::unique_ptr<cctz::ZoneInfoSource>(
-        const std::string& name)>& /*fallback_factory*/) {
-  for (const ZoneInfo& zoneinfo : kZoneInfo) {
-    if (name == zoneinfo.name) {
-      if (zoneinfo.data == nullptr) return nullptr;
-      return std::unique_ptr<cctz::ZoneInfoSource>(
-          new TestZoneInfoSource(zoneinfo.data, zoneinfo.length));
-    }
-  }
-  ABSL_RAW_LOG(FATAL, "Unexpected time zone \"%s\" in test", name.c_str());
-  return nullptr;
-}
-
-}  // namespace
-
-#if !defined(__MINGW32__)
-// MinGW does not support the weak symbol extension mechanism.
-ZoneInfoSourceFactory zone_info_source_factory = TestFactory;
-#endif
-
-}  // namespace cctz_extension
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/internal/test_util.h b/third_party/abseil/absl/time/internal/test_util.h
deleted file mode 100644
index 5c4bf1f..0000000
--- a/third_party/abseil/absl/time/internal/test_util.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_TIME_INTERNAL_TEST_UTIL_H_
-#define ABSL_TIME_INTERNAL_TEST_UTIL_H_
-
-#include <string>
-
-#include "absl/time/time.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace time_internal {
-
-// Loads the named timezone, but dies on any failure.
-absl::TimeZone LoadTimeZone(const std::string& name);
-
-}  // namespace time_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_INTERNAL_TEST_UTIL_H_
diff --git a/third_party/abseil/absl/time/internal/zoneinfo.inc b/third_party/abseil/absl/time/internal/zoneinfo.inc
deleted file mode 100644
index bfed829..0000000
--- a/third_party/abseil/absl/time/internal/zoneinfo.inc
+++ /dev/null
@@ -1,729 +0,0 @@
-unsigned char America_Los_Angeles[] = {
-  0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x14, 0x80, 0x00, 0x00, 0x00,
-  0x9e, 0xa6, 0x48, 0xa0, 0x9f, 0xbb, 0x15, 0x90, 0xa0, 0x86, 0x2a, 0xa0,
-  0xa1, 0x9a, 0xf7, 0x90, 0xcb, 0x89, 0x1a, 0xa0, 0xd2, 0x23, 0xf4, 0x70,
-  0xd2, 0x61, 0x26, 0x10, 0xd6, 0xfe, 0x74, 0x5c, 0xd8, 0x80, 0xad, 0x90,
-  0xda, 0xfe, 0xc3, 0x90, 0xdb, 0xc0, 0x90, 0x10, 0xdc, 0xde, 0xa5, 0x90,
-  0xdd, 0xa9, 0xac, 0x90, 0xde, 0xbe, 0x87, 0x90, 0xdf, 0x89, 0x8e, 0x90,
-  0xe0, 0x9e, 0x69, 0x90, 0xe1, 0x69, 0x70, 0x90, 0xe2, 0x7e, 0x4b, 0x90,
-  0xe3, 0x49, 0x52, 0x90, 0xe4, 0x5e, 0x2d, 0x90, 0xe5, 0x29, 0x34, 0x90,
-  0xe6, 0x47, 0x4a, 0x10, 0xe7, 0x12, 0x51, 0x10, 0xe8, 0x27, 0x2c, 0x10,
-  0xe8, 0xf2, 0x33, 0x10, 0xea, 0x07, 0x0e, 0x10, 0xea, 0xd2, 0x15, 0x10,
-  0xeb, 0xe6, 0xf0, 0x10, 0xec, 0xb1, 0xf7, 0x10, 0xed, 0xc6, 0xd2, 0x10,
-  0xee, 0x91, 0xd9, 0x10, 0xef, 0xaf, 0xee, 0x90, 0xf0, 0x71, 0xbb, 0x10,
-  0xf1, 0x8f, 0xd0, 0x90, 0xf2, 0x7f, 0xc1, 0x90, 0xf3, 0x6f, 0xb2, 0x90,
-  0xf4, 0x5f, 0xa3, 0x90, 0xf5, 0x4f, 0x94, 0x90, 0xf6, 0x3f, 0x85, 0x90,
-  0xf7, 0x2f, 0x76, 0x90, 0xf8, 0x28, 0xa2, 0x10, 0xf9, 0x0f, 0x58, 0x90,
-  0xfa, 0x08, 0x84, 0x10, 0xfa, 0xf8, 0x83, 0x20, 0xfb, 0xe8, 0x66, 0x10,
-  0xfc, 0xd8, 0x65, 0x20, 0xfd, 0xc8, 0x48, 0x10, 0xfe, 0xb8, 0x47, 0x20,
-  0xff, 0xa8, 0x2a, 0x10, 0x00, 0x98, 0x29, 0x20, 0x01, 0x88, 0x0c, 0x10,
-  0x02, 0x78, 0x0b, 0x20, 0x03, 0x71, 0x28, 0x90, 0x04, 0x61, 0x27, 0xa0,
-  0x05, 0x51, 0x0a, 0x90, 0x06, 0x41, 0x09, 0xa0, 0x07, 0x30, 0xec, 0x90,
-  0x07, 0x8d, 0x43, 0xa0, 0x09, 0x10, 0xce, 0x90, 0x09, 0xad, 0xbf, 0x20,
-  0x0a, 0xf0, 0xb0, 0x90, 0x0b, 0xe0, 0xaf, 0xa0, 0x0c, 0xd9, 0xcd, 0x10,
-  0x0d, 0xc0, 0x91, 0xa0, 0x0e, 0xb9, 0xaf, 0x10, 0x0f, 0xa9, 0xae, 0x20,
-  0x10, 0x99, 0x91, 0x10, 0x11, 0x89, 0x90, 0x20, 0x12, 0x79, 0x73, 0x10,
-  0x13, 0x69, 0x72, 0x20, 0x14, 0x59, 0x55, 0x10, 0x15, 0x49, 0x54, 0x20,
-  0x16, 0x39, 0x37, 0x10, 0x17, 0x29, 0x36, 0x20, 0x18, 0x22, 0x53, 0x90,
-  0x19, 0x09, 0x18, 0x20, 0x1a, 0x02, 0x35, 0x90, 0x1a, 0xf2, 0x34, 0xa0,
-  0x1b, 0xe2, 0x17, 0x90, 0x1c, 0xd2, 0x16, 0xa0, 0x1d, 0xc1, 0xf9, 0x90,
-  0x1e, 0xb1, 0xf8, 0xa0, 0x1f, 0xa1, 0xdb, 0x90, 0x20, 0x76, 0x2b, 0x20,
-  0x21, 0x81, 0xbd, 0x90, 0x22, 0x56, 0x0d, 0x20, 0x23, 0x6a, 0xda, 0x10,
-  0x24, 0x35, 0xef, 0x20, 0x25, 0x4a, 0xbc, 0x10, 0x26, 0x15, 0xd1, 0x20,
-  0x27, 0x2a, 0x9e, 0x10, 0x27, 0xfe, 0xed, 0xa0, 0x29, 0x0a, 0x80, 0x10,
-  0x29, 0xde, 0xcf, 0xa0, 0x2a, 0xea, 0x62, 0x10, 0x2b, 0xbe, 0xb1, 0xa0,
-  0x2c, 0xd3, 0x7e, 0x90, 0x2d, 0x9e, 0x93, 0xa0, 0x2e, 0xb3, 0x60, 0x90,
-  0x2f, 0x7e, 0x75, 0xa0, 0x30, 0x93, 0x42, 0x90, 0x31, 0x67, 0x92, 0x20,
-  0x32, 0x73, 0x24, 0x90, 0x33, 0x47, 0x74, 0x20, 0x34, 0x53, 0x06, 0x90,
-  0x35, 0x27, 0x56, 0x20, 0x36, 0x32, 0xe8, 0x90, 0x37, 0x07, 0x38, 0x20,
-  0x38, 0x1c, 0x05, 0x10, 0x38, 0xe7, 0x1a, 0x20, 0x39, 0xfb, 0xe7, 0x10,
-  0x3a, 0xc6, 0xfc, 0x20, 0x3b, 0xdb, 0xc9, 0x10, 0x3c, 0xb0, 0x18, 0xa0,
-  0x3d, 0xbb, 0xab, 0x10, 0x3e, 0x8f, 0xfa, 0xa0, 0x3f, 0x9b, 0x8d, 0x10,
-  0x40, 0x6f, 0xdc, 0xa0, 0x41, 0x84, 0xa9, 0x90, 0x42, 0x4f, 0xbe, 0xa0,
-  0x43, 0x64, 0x8b, 0x90, 0x44, 0x2f, 0xa0, 0xa0, 0x45, 0x44, 0x6d, 0x90,
-  0x45, 0xf3, 0xd3, 0x20, 0x47, 0x2d, 0x8a, 0x10, 0x47, 0xd3, 0xb5, 0x20,
-  0x49, 0x0d, 0x6c, 0x10, 0x49, 0xb3, 0x97, 0x20, 0x4a, 0xed, 0x4e, 0x10,
-  0x4b, 0x9c, 0xb3, 0xa0, 0x4c, 0xd6, 0x6a, 0x90, 0x4d, 0x7c, 0x95, 0xa0,
-  0x4e, 0xb6, 0x4c, 0x90, 0x4f, 0x5c, 0x77, 0xa0, 0x50, 0x96, 0x2e, 0x90,
-  0x51, 0x3c, 0x59, 0xa0, 0x52, 0x76, 0x10, 0x90, 0x53, 0x1c, 0x3b, 0xa0,
-  0x54, 0x55, 0xf2, 0x90, 0x54, 0xfc, 0x1d, 0xa0, 0x56, 0x35, 0xd4, 0x90,
-  0x56, 0xe5, 0x3a, 0x20, 0x58, 0x1e, 0xf1, 0x10, 0x58, 0xc5, 0x1c, 0x20,
-  0x59, 0xfe, 0xd3, 0x10, 0x5a, 0xa4, 0xfe, 0x20, 0x5b, 0xde, 0xb5, 0x10,
-  0x5c, 0x84, 0xe0, 0x20, 0x5d, 0xbe, 0x97, 0x10, 0x5e, 0x64, 0xc2, 0x20,
-  0x5f, 0x9e, 0x79, 0x10, 0x60, 0x4d, 0xde, 0xa0, 0x61, 0x87, 0x95, 0x90,
-  0x62, 0x2d, 0xc0, 0xa0, 0x63, 0x67, 0x77, 0x90, 0x64, 0x0d, 0xa2, 0xa0,
-  0x65, 0x47, 0x59, 0x90, 0x65, 0xed, 0x84, 0xa0, 0x67, 0x27, 0x3b, 0x90,
-  0x67, 0xcd, 0x66, 0xa0, 0x69, 0x07, 0x1d, 0x90, 0x69, 0xad, 0x48, 0xa0,
-  0x6a, 0xe6, 0xff, 0x90, 0x6b, 0x96, 0x65, 0x20, 0x6c, 0xd0, 0x1c, 0x10,
-  0x6d, 0x76, 0x47, 0x20, 0x6e, 0xaf, 0xfe, 0x10, 0x6f, 0x56, 0x29, 0x20,
-  0x70, 0x8f, 0xe0, 0x10, 0x71, 0x36, 0x0b, 0x20, 0x72, 0x6f, 0xc2, 0x10,
-  0x73, 0x15, 0xed, 0x20, 0x74, 0x4f, 0xa4, 0x10, 0x74, 0xff, 0x09, 0xa0,
-  0x76, 0x38, 0xc0, 0x90, 0x76, 0xde, 0xeb, 0xa0, 0x78, 0x18, 0xa2, 0x90,
-  0x78, 0xbe, 0xcd, 0xa0, 0x79, 0xf8, 0x84, 0x90, 0x7a, 0x9e, 0xaf, 0xa0,
-  0x7b, 0xd8, 0x66, 0x90, 0x7c, 0x7e, 0x91, 0xa0, 0x7d, 0xb8, 0x48, 0x90,
-  0x7e, 0x5e, 0x73, 0xa0, 0x7f, 0x98, 0x2a, 0x90, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x03, 0x04, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
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-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0xff, 0xff, 0x91, 0x26, 0x00, 0x00, 0xff, 0xff, 0x9d, 0x90, 0x01,
-  0x04, 0xff, 0xff, 0x8f, 0x80, 0x00, 0x08, 0xff, 0xff, 0x9d, 0x90, 0x01,
-  0x0c, 0xff, 0xff, 0x9d, 0x90, 0x01, 0x10, 0x4c, 0x4d, 0x54, 0x00, 0x50,
-  0x44, 0x54, 0x00, 0x50, 0x53, 0x54, 0x00, 0x50, 0x57, 0x54, 0x00, 0x50,
-  0x50, 0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
-  0x01, 0x0a, 0x50, 0x53, 0x54, 0x38, 0x50, 0x44, 0x54, 0x2c, 0x4d, 0x33,
-  0x2e, 0x32, 0x2e, 0x30, 0x2c, 0x4d, 0x31, 0x31, 0x2e, 0x31, 0x2e, 0x30,
-  0x0a
-};
-unsigned int America_Los_Angeles_len = 2845;
-unsigned char America_New_York[] = {
-  0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xec,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x14, 0x80, 0x00, 0x00, 0x00,
-  0x9e, 0xa6, 0x1e, 0x70, 0x9f, 0xba, 0xeb, 0x60, 0xa0, 0x86, 0x00, 0x70,
-  0xa1, 0x9a, 0xcd, 0x60, 0xa2, 0x65, 0xe2, 0x70, 0xa3, 0x83, 0xe9, 0xe0,
-  0xa4, 0x6a, 0xae, 0x70, 0xa5, 0x35, 0xa7, 0x60, 0xa6, 0x53, 0xca, 0xf0,
-  0xa7, 0x15, 0x89, 0x60, 0xa8, 0x33, 0xac, 0xf0, 0xa8, 0xfe, 0xa5, 0xe0,
-  0xaa, 0x13, 0x8e, 0xf0, 0xaa, 0xde, 0x87, 0xe0, 0xab, 0xf3, 0x70, 0xf0,
-  0xac, 0xbe, 0x69, 0xe0, 0xad, 0xd3, 0x52, 0xf0, 0xae, 0x9e, 0x4b, 0xe0,
-  0xaf, 0xb3, 0x34, 0xf0, 0xb0, 0x7e, 0x2d, 0xe0, 0xb1, 0x9c, 0x51, 0x70,
-  0xb2, 0x67, 0x4a, 0x60, 0xb3, 0x7c, 0x33, 0x70, 0xb4, 0x47, 0x2c, 0x60,
-  0xb5, 0x5c, 0x15, 0x70, 0xb6, 0x27, 0x0e, 0x60, 0xb7, 0x3b, 0xf7, 0x70,
-  0xb8, 0x06, 0xf0, 0x60, 0xb9, 0x1b, 0xd9, 0x70, 0xb9, 0xe6, 0xd2, 0x60,
-  0xbb, 0x04, 0xf5, 0xf0, 0xbb, 0xc6, 0xb4, 0x60, 0xbc, 0xe4, 0xd7, 0xf0,
-  0xbd, 0xaf, 0xd0, 0xe0, 0xbe, 0xc4, 0xb9, 0xf0, 0xbf, 0x8f, 0xb2, 0xe0,
-  0xc0, 0xa4, 0x9b, 0xf0, 0xc1, 0x6f, 0x94, 0xe0, 0xc2, 0x84, 0x7d, 0xf0,
-  0xc3, 0x4f, 0x76, 0xe0, 0xc4, 0x64, 0x5f, 0xf0, 0xc5, 0x2f, 0x58, 0xe0,
-  0xc6, 0x4d, 0x7c, 0x70, 0xc7, 0x0f, 0x3a, 0xe0, 0xc8, 0x2d, 0x5e, 0x70,
-  0xc8, 0xf8, 0x57, 0x60, 0xca, 0x0d, 0x40, 0x70, 0xca, 0xd8, 0x39, 0x60,
-  0xcb, 0x88, 0xf0, 0x70, 0xd2, 0x23, 0xf4, 0x70, 0xd2, 0x60, 0xfb, 0xe0,
-  0xd3, 0x75, 0xe4, 0xf0, 0xd4, 0x40, 0xdd, 0xe0, 0xd5, 0x55, 0xc6, 0xf0,
-  0xd6, 0x20, 0xbf, 0xe0, 0xd7, 0x35, 0xa8, 0xf0, 0xd8, 0x00, 0xa1, 0xe0,
-  0xd9, 0x15, 0x8a, 0xf0, 0xd9, 0xe0, 0x83, 0xe0, 0xda, 0xfe, 0xa7, 0x70,
-  0xdb, 0xc0, 0x65, 0xe0, 0xdc, 0xde, 0x89, 0x70, 0xdd, 0xa9, 0x82, 0x60,
-  0xde, 0xbe, 0x6b, 0x70, 0xdf, 0x89, 0x64, 0x60, 0xe0, 0x9e, 0x4d, 0x70,
-  0xe1, 0x69, 0x46, 0x60, 0xe2, 0x7e, 0x2f, 0x70, 0xe3, 0x49, 0x28, 0x60,
-  0xe4, 0x5e, 0x11, 0x70, 0xe5, 0x57, 0x2e, 0xe0, 0xe6, 0x47, 0x2d, 0xf0,
-  0xe7, 0x37, 0x10, 0xe0, 0xe8, 0x27, 0x0f, 0xf0, 0xe9, 0x16, 0xf2, 0xe0,
-  0xea, 0x06, 0xf1, 0xf0, 0xea, 0xf6, 0xd4, 0xe0, 0xeb, 0xe6, 0xd3, 0xf0,
-  0xec, 0xd6, 0xb6, 0xe0, 0xed, 0xc6, 0xb5, 0xf0, 0xee, 0xbf, 0xd3, 0x60,
-  0xef, 0xaf, 0xd2, 0x70, 0xf0, 0x9f, 0xb5, 0x60, 0xf1, 0x8f, 0xb4, 0x70,
-  0xf2, 0x7f, 0x97, 0x60, 0xf3, 0x6f, 0x96, 0x70, 0xf4, 0x5f, 0x79, 0x60,
-  0xf5, 0x4f, 0x78, 0x70, 0xf6, 0x3f, 0x5b, 0x60, 0xf7, 0x2f, 0x5a, 0x70,
-  0xf8, 0x28, 0x77, 0xe0, 0xf9, 0x0f, 0x3c, 0x70, 0xfa, 0x08, 0x59, 0xe0,
-  0xfa, 0xf8, 0x58, 0xf0, 0xfb, 0xe8, 0x3b, 0xe0, 0xfc, 0xd8, 0x3a, 0xf0,
-  0xfd, 0xc8, 0x1d, 0xe0, 0xfe, 0xb8, 0x1c, 0xf0, 0xff, 0xa7, 0xff, 0xe0,
-  0x00, 0x97, 0xfe, 0xf0, 0x01, 0x87, 0xe1, 0xe0, 0x02, 0x77, 0xe0, 0xf0,
-  0x03, 0x70, 0xfe, 0x60, 0x04, 0x60, 0xfd, 0x70, 0x05, 0x50, 0xe0, 0x60,
-  0x06, 0x40, 0xdf, 0x70, 0x07, 0x30, 0xc2, 0x60, 0x07, 0x8d, 0x19, 0x70,
-  0x09, 0x10, 0xa4, 0x60, 0x09, 0xad, 0x94, 0xf0, 0x0a, 0xf0, 0x86, 0x60,
-  0x0b, 0xe0, 0x85, 0x70, 0x0c, 0xd9, 0xa2, 0xe0, 0x0d, 0xc0, 0x67, 0x70,
-  0x0e, 0xb9, 0x84, 0xe0, 0x0f, 0xa9, 0x83, 0xf0, 0x10, 0x99, 0x66, 0xe0,
-  0x11, 0x89, 0x65, 0xf0, 0x12, 0x79, 0x48, 0xe0, 0x13, 0x69, 0x47, 0xf0,
-  0x14, 0x59, 0x2a, 0xe0, 0x15, 0x49, 0x29, 0xf0, 0x16, 0x39, 0x0c, 0xe0,
-  0x17, 0x29, 0x0b, 0xf0, 0x18, 0x22, 0x29, 0x60, 0x19, 0x08, 0xed, 0xf0,
-  0x1a, 0x02, 0x0b, 0x60, 0x1a, 0xf2, 0x0a, 0x70, 0x1b, 0xe1, 0xed, 0x60,
-  0x1c, 0xd1, 0xec, 0x70, 0x1d, 0xc1, 0xcf, 0x60, 0x1e, 0xb1, 0xce, 0x70,
-  0x1f, 0xa1, 0xb1, 0x60, 0x20, 0x76, 0x00, 0xf0, 0x21, 0x81, 0x93, 0x60,
-  0x22, 0x55, 0xe2, 0xf0, 0x23, 0x6a, 0xaf, 0xe0, 0x24, 0x35, 0xc4, 0xf0,
-  0x25, 0x4a, 0x91, 0xe0, 0x26, 0x15, 0xa6, 0xf0, 0x27, 0x2a, 0x73, 0xe0,
-  0x27, 0xfe, 0xc3, 0x70, 0x29, 0x0a, 0x55, 0xe0, 0x29, 0xde, 0xa5, 0x70,
-  0x2a, 0xea, 0x37, 0xe0, 0x2b, 0xbe, 0x87, 0x70, 0x2c, 0xd3, 0x54, 0x60,
-  0x2d, 0x9e, 0x69, 0x70, 0x2e, 0xb3, 0x36, 0x60, 0x2f, 0x7e, 0x4b, 0x70,
-  0x30, 0x93, 0x18, 0x60, 0x31, 0x67, 0x67, 0xf0, 0x32, 0x72, 0xfa, 0x60,
-  0x33, 0x47, 0x49, 0xf0, 0x34, 0x52, 0xdc, 0x60, 0x35, 0x27, 0x2b, 0xf0,
-  0x36, 0x32, 0xbe, 0x60, 0x37, 0x07, 0x0d, 0xf0, 0x38, 0x1b, 0xda, 0xe0,
-  0x38, 0xe6, 0xef, 0xf0, 0x39, 0xfb, 0xbc, 0xe0, 0x3a, 0xc6, 0xd1, 0xf0,
-  0x3b, 0xdb, 0x9e, 0xe0, 0x3c, 0xaf, 0xee, 0x70, 0x3d, 0xbb, 0x80, 0xe0,
-  0x3e, 0x8f, 0xd0, 0x70, 0x3f, 0x9b, 0x62, 0xe0, 0x40, 0x6f, 0xb2, 0x70,
-  0x41, 0x84, 0x7f, 0x60, 0x42, 0x4f, 0x94, 0x70, 0x43, 0x64, 0x61, 0x60,
-  0x44, 0x2f, 0x76, 0x70, 0x45, 0x44, 0x43, 0x60, 0x45, 0xf3, 0xa8, 0xf0,
-  0x47, 0x2d, 0x5f, 0xe0, 0x47, 0xd3, 0x8a, 0xf0, 0x49, 0x0d, 0x41, 0xe0,
-  0x49, 0xb3, 0x6c, 0xf0, 0x4a, 0xed, 0x23, 0xe0, 0x4b, 0x9c, 0x89, 0x70,
-  0x4c, 0xd6, 0x40, 0x60, 0x4d, 0x7c, 0x6b, 0x70, 0x4e, 0xb6, 0x22, 0x60,
-  0x4f, 0x5c, 0x4d, 0x70, 0x50, 0x96, 0x04, 0x60, 0x51, 0x3c, 0x2f, 0x70,
-  0x52, 0x75, 0xe6, 0x60, 0x53, 0x1c, 0x11, 0x70, 0x54, 0x55, 0xc8, 0x60,
-  0x54, 0xfb, 0xf3, 0x70, 0x56, 0x35, 0xaa, 0x60, 0x56, 0xe5, 0x0f, 0xf0,
-  0x58, 0x1e, 0xc6, 0xe0, 0x58, 0xc4, 0xf1, 0xf0, 0x59, 0xfe, 0xa8, 0xe0,
-  0x5a, 0xa4, 0xd3, 0xf0, 0x5b, 0xde, 0x8a, 0xe0, 0x5c, 0x84, 0xb5, 0xf0,
-  0x5d, 0xbe, 0x6c, 0xe0, 0x5e, 0x64, 0x97, 0xf0, 0x5f, 0x9e, 0x4e, 0xe0,
-  0x60, 0x4d, 0xb4, 0x70, 0x61, 0x87, 0x6b, 0x60, 0x62, 0x2d, 0x96, 0x70,
-  0x63, 0x67, 0x4d, 0x60, 0x64, 0x0d, 0x78, 0x70, 0x65, 0x47, 0x2f, 0x60,
-  0x65, 0xed, 0x5a, 0x70, 0x67, 0x27, 0x11, 0x60, 0x67, 0xcd, 0x3c, 0x70,
-  0x69, 0x06, 0xf3, 0x60, 0x69, 0xad, 0x1e, 0x70, 0x6a, 0xe6, 0xd5, 0x60,
-  0x6b, 0x96, 0x3a, 0xf0, 0x6c, 0xcf, 0xf1, 0xe0, 0x6d, 0x76, 0x1c, 0xf0,
-  0x6e, 0xaf, 0xd3, 0xe0, 0x6f, 0x55, 0xfe, 0xf0, 0x70, 0x8f, 0xb5, 0xe0,
-  0x71, 0x35, 0xe0, 0xf0, 0x72, 0x6f, 0x97, 0xe0, 0x73, 0x15, 0xc2, 0xf0,
-  0x74, 0x4f, 0x79, 0xe0, 0x74, 0xfe, 0xdf, 0x70, 0x76, 0x38, 0x96, 0x60,
-  0x76, 0xde, 0xc1, 0x70, 0x78, 0x18, 0x78, 0x60, 0x78, 0xbe, 0xa3, 0x70,
-  0x79, 0xf8, 0x5a, 0x60, 0x7a, 0x9e, 0x85, 0x70, 0x7b, 0xd8, 0x3c, 0x60,
-  0x7c, 0x7e, 0x67, 0x70, 0x7d, 0xb8, 0x1e, 0x60, 0x7e, 0x5e, 0x49, 0x70,
-  0x7f, 0x98, 0x00, 0x60, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x03, 0x04, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0xff, 0xff, 0xba, 0x9e, 0x00, 0x00, 0xff, 0xff, 0xc7, 0xc0, 0x01, 0x04,
-  0xff, 0xff, 0xb9, 0xb0, 0x00, 0x08, 0xff, 0xff, 0xc7, 0xc0, 0x01, 0x0c,
-  0xff, 0xff, 0xc7, 0xc0, 0x01, 0x10, 0x4c, 0x4d, 0x54, 0x00, 0x45, 0x44,
-  0x54, 0x00, 0x45, 0x53, 0x54, 0x00, 0x45, 0x57, 0x54, 0x00, 0x45, 0x50,
-  0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01,
-  0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xed,
-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x14, 0xf8, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x5e, 0x03, 0xf0, 0x90,
-  0xff, 0xff, 0xff, 0xff, 0x9e, 0xa6, 0x1e, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0x9f, 0xba, 0xeb, 0x60, 0xff, 0xff, 0xff, 0xff, 0xa0, 0x86, 0x00, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xa1, 0x9a, 0xcd, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xa2, 0x65, 0xe2, 0x70, 0xff, 0xff, 0xff, 0xff, 0xa3, 0x83, 0xe9, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xa4, 0x6a, 0xae, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xa5, 0x35, 0xa7, 0x60, 0xff, 0xff, 0xff, 0xff, 0xa6, 0x53, 0xca, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xa7, 0x15, 0x89, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xa8, 0x33, 0xac, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xa8, 0xfe, 0xa5, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xaa, 0x13, 0x8e, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xaa, 0xde, 0x87, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xab, 0xf3, 0x70, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xac, 0xbe, 0x69, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xad, 0xd3, 0x52, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xae, 0x9e, 0x4b, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xaf, 0xb3, 0x34, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xb0, 0x7e, 0x2d, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xb1, 0x9c, 0x51, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xb2, 0x67, 0x4a, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xb3, 0x7c, 0x33, 0x70, 0xff, 0xff, 0xff, 0xff, 0xb4, 0x47, 0x2c, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xb5, 0x5c, 0x15, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xb6, 0x27, 0x0e, 0x60, 0xff, 0xff, 0xff, 0xff, 0xb7, 0x3b, 0xf7, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xb8, 0x06, 0xf0, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xb9, 0x1b, 0xd9, 0x70, 0xff, 0xff, 0xff, 0xff, 0xb9, 0xe6, 0xd2, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xbb, 0x04, 0xf5, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xbb, 0xc6, 0xb4, 0x60, 0xff, 0xff, 0xff, 0xff, 0xbc, 0xe4, 0xd7, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xbd, 0xaf, 0xd0, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xbe, 0xc4, 0xb9, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xbf, 0x8f, 0xb2, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xc0, 0xa4, 0x9b, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xc1, 0x6f, 0x94, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xc2, 0x84, 0x7d, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xc3, 0x4f, 0x76, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xc4, 0x64, 0x5f, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xc5, 0x2f, 0x58, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xc6, 0x4d, 0x7c, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xc7, 0x0f, 0x3a, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xc8, 0x2d, 0x5e, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xc8, 0xf8, 0x57, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xca, 0x0d, 0x40, 0x70, 0xff, 0xff, 0xff, 0xff, 0xca, 0xd8, 0x39, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xcb, 0x88, 0xf0, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xd2, 0x23, 0xf4, 0x70, 0xff, 0xff, 0xff, 0xff, 0xd2, 0x60, 0xfb, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xd3, 0x75, 0xe4, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xd4, 0x40, 0xdd, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xd5, 0x55, 0xc6, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xd6, 0x20, 0xbf, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xd7, 0x35, 0xa8, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xd8, 0x00, 0xa1, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xd9, 0x15, 0x8a, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xd9, 0xe0, 0x83, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xda, 0xfe, 0xa7, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xdb, 0xc0, 0x65, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xdc, 0xde, 0x89, 0x70, 0xff, 0xff, 0xff, 0xff, 0xdd, 0xa9, 0x82, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xde, 0xbe, 0x6b, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xdf, 0x89, 0x64, 0x60, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x9e, 0x4d, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xe1, 0x69, 0x46, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xe2, 0x7e, 0x2f, 0x70, 0xff, 0xff, 0xff, 0xff, 0xe3, 0x49, 0x28, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xe4, 0x5e, 0x11, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xe5, 0x57, 0x2e, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xe6, 0x47, 0x2d, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xe7, 0x37, 0x10, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xe8, 0x27, 0x0f, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xe9, 0x16, 0xf2, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xea, 0x06, 0xf1, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xea, 0xf6, 0xd4, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xeb, 0xe6, 0xd3, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xec, 0xd6, 0xb6, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xed, 0xc6, 0xb5, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xee, 0xbf, 0xd3, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xef, 0xaf, 0xd2, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xf0, 0x9f, 0xb5, 0x60, 0xff, 0xff, 0xff, 0xff, 0xf1, 0x8f, 0xb4, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xf2, 0x7f, 0x97, 0x60, 0xff, 0xff, 0xff, 0xff,
-  0xf3, 0x6f, 0x96, 0x70, 0xff, 0xff, 0xff, 0xff, 0xf4, 0x5f, 0x79, 0x60,
-  0xff, 0xff, 0xff, 0xff, 0xf5, 0x4f, 0x78, 0x70, 0xff, 0xff, 0xff, 0xff,
-  0xf6, 0x3f, 0x5b, 0x60, 0xff, 0xff, 0xff, 0xff, 0xf7, 0x2f, 0x5a, 0x70,
-  0xff, 0xff, 0xff, 0xff, 0xf8, 0x28, 0x77, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xf9, 0x0f, 0x3c, 0x70, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x08, 0x59, 0xe0,
-  0xff, 0xff, 0xff, 0xff, 0xfa, 0xf8, 0x58, 0xf0, 0xff, 0xff, 0xff, 0xff,
-  0xfb, 0xe8, 0x3b, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xfc, 0xd8, 0x3a, 0xf0,
-  0xff, 0xff, 0xff, 0xff, 0xfd, 0xc8, 0x1d, 0xe0, 0xff, 0xff, 0xff, 0xff,
-  0xfe, 0xb8, 0x1c, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xa7, 0xff, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x97, 0xfe, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x01, 0x87, 0xe1, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x02, 0x77, 0xe0, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x03, 0x70, 0xfe, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x04, 0x60, 0xfd, 0x70, 0x00, 0x00, 0x00, 0x00, 0x05, 0x50, 0xe0, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x06, 0x40, 0xdf, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x07, 0x30, 0xc2, 0x60, 0x00, 0x00, 0x00, 0x00, 0x07, 0x8d, 0x19, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x09, 0x10, 0xa4, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x09, 0xad, 0x94, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x0a, 0xf0, 0x86, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x0b, 0xe0, 0x85, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x0c, 0xd9, 0xa2, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x0d, 0xc0, 0x67, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x0e, 0xb9, 0x84, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x0f, 0xa9, 0x83, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x10, 0x99, 0x66, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x11, 0x89, 0x65, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x12, 0x79, 0x48, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x13, 0x69, 0x47, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x14, 0x59, 0x2a, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x15, 0x49, 0x29, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x16, 0x39, 0x0c, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x17, 0x29, 0x0b, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x18, 0x22, 0x29, 0x60, 0x00, 0x00, 0x00, 0x00, 0x19, 0x08, 0xed, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x1a, 0x02, 0x0b, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x1a, 0xf2, 0x0a, 0x70, 0x00, 0x00, 0x00, 0x00, 0x1b, 0xe1, 0xed, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x1c, 0xd1, 0xec, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x1d, 0xc1, 0xcf, 0x60, 0x00, 0x00, 0x00, 0x00, 0x1e, 0xb1, 0xce, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x1f, 0xa1, 0xb1, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x20, 0x76, 0x00, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x21, 0x81, 0x93, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x22, 0x55, 0xe2, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x23, 0x6a, 0xaf, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x24, 0x35, 0xc4, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x25, 0x4a, 0x91, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x26, 0x15, 0xa6, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x27, 0x2a, 0x73, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x27, 0xfe, 0xc3, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x29, 0x0a, 0x55, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x29, 0xde, 0xa5, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x2a, 0xea, 0x37, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x2b, 0xbe, 0x87, 0x70, 0x00, 0x00, 0x00, 0x00, 0x2c, 0xd3, 0x54, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x2d, 0x9e, 0x69, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x2e, 0xb3, 0x36, 0x60, 0x00, 0x00, 0x00, 0x00, 0x2f, 0x7e, 0x4b, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x30, 0x93, 0x18, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x31, 0x67, 0x67, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x32, 0x72, 0xfa, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x33, 0x47, 0x49, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x34, 0x52, 0xdc, 0x60, 0x00, 0x00, 0x00, 0x00, 0x35, 0x27, 0x2b, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x36, 0x32, 0xbe, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x37, 0x07, 0x0d, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x38, 0x1b, 0xda, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x38, 0xe6, 0xef, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x39, 0xfb, 0xbc, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x3a, 0xc6, 0xd1, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x3b, 0xdb, 0x9e, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x3c, 0xaf, 0xee, 0x70, 0x00, 0x00, 0x00, 0x00, 0x3d, 0xbb, 0x80, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x3e, 0x8f, 0xd0, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x3f, 0x9b, 0x62, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x40, 0x6f, 0xb2, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x41, 0x84, 0x7f, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x42, 0x4f, 0x94, 0x70, 0x00, 0x00, 0x00, 0x00, 0x43, 0x64, 0x61, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x44, 0x2f, 0x76, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x45, 0x44, 0x43, 0x60, 0x00, 0x00, 0x00, 0x00, 0x45, 0xf3, 0xa8, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x47, 0x2d, 0x5f, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x47, 0xd3, 0x8a, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x49, 0x0d, 0x41, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x49, 0xb3, 0x6c, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x4a, 0xed, 0x23, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x4b, 0x9c, 0x89, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x4c, 0xd6, 0x40, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x4d, 0x7c, 0x6b, 0x70, 0x00, 0x00, 0x00, 0x00, 0x4e, 0xb6, 0x22, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x4f, 0x5c, 0x4d, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x50, 0x96, 0x04, 0x60, 0x00, 0x00, 0x00, 0x00, 0x51, 0x3c, 0x2f, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x52, 0x75, 0xe6, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x53, 0x1c, 0x11, 0x70, 0x00, 0x00, 0x00, 0x00, 0x54, 0x55, 0xc8, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x54, 0xfb, 0xf3, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x56, 0x35, 0xaa, 0x60, 0x00, 0x00, 0x00, 0x00, 0x56, 0xe5, 0x0f, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x58, 0x1e, 0xc6, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x58, 0xc4, 0xf1, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x59, 0xfe, 0xa8, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x5a, 0xa4, 0xd3, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x5b, 0xde, 0x8a, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x5c, 0x84, 0xb5, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x5d, 0xbe, 0x6c, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x5e, 0x64, 0x97, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x5f, 0x9e, 0x4e, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x60, 0x4d, 0xb4, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x61, 0x87, 0x6b, 0x60, 0x00, 0x00, 0x00, 0x00, 0x62, 0x2d, 0x96, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x63, 0x67, 0x4d, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x64, 0x0d, 0x78, 0x70, 0x00, 0x00, 0x00, 0x00, 0x65, 0x47, 0x2f, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x65, 0xed, 0x5a, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x67, 0x27, 0x11, 0x60, 0x00, 0x00, 0x00, 0x00, 0x67, 0xcd, 0x3c, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x69, 0x06, 0xf3, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x69, 0xad, 0x1e, 0x70, 0x00, 0x00, 0x00, 0x00, 0x6a, 0xe6, 0xd5, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x6b, 0x96, 0x3a, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x6c, 0xcf, 0xf1, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x6d, 0x76, 0x1c, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x6e, 0xaf, 0xd3, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x6f, 0x55, 0xfe, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x70, 0x8f, 0xb5, 0xe0,
-  0x00, 0x00, 0x00, 0x00, 0x71, 0x35, 0xe0, 0xf0, 0x00, 0x00, 0x00, 0x00,
-  0x72, 0x6f, 0x97, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x73, 0x15, 0xc2, 0xf0,
-  0x00, 0x00, 0x00, 0x00, 0x74, 0x4f, 0x79, 0xe0, 0x00, 0x00, 0x00, 0x00,
-  0x74, 0xfe, 0xdf, 0x70, 0x00, 0x00, 0x00, 0x00, 0x76, 0x38, 0x96, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x76, 0xde, 0xc1, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x78, 0x18, 0x78, 0x60, 0x00, 0x00, 0x00, 0x00, 0x78, 0xbe, 0xa3, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x79, 0xf8, 0x5a, 0x60, 0x00, 0x00, 0x00, 0x00,
-  0x7a, 0x9e, 0x85, 0x70, 0x00, 0x00, 0x00, 0x00, 0x7b, 0xd8, 0x3c, 0x60,
-  0x00, 0x00, 0x00, 0x00, 0x7c, 0x7e, 0x67, 0x70, 0x00, 0x00, 0x00, 0x00,
-  0x7d, 0xb8, 0x1e, 0x60, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x5e, 0x49, 0x70,
-  0x00, 0x00, 0x00, 0x00, 0x7f, 0x98, 0x00, 0x60, 0x00, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x03, 0x04,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01,
-  0x02, 0x01, 0x02, 0x01, 0x02, 0xff, 0xff, 0xba, 0x9e, 0x00, 0x00, 0xff,
-  0xff, 0xc7, 0xc0, 0x01, 0x04, 0xff, 0xff, 0xb9, 0xb0, 0x00, 0x08, 0xff,
-  0xff, 0xc7, 0xc0, 0x01, 0x0c, 0xff, 0xff, 0xc7, 0xc0, 0x01, 0x10, 0x4c,
-  0x4d, 0x54, 0x00, 0x45, 0x44, 0x54, 0x00, 0x45, 0x53, 0x54, 0x00, 0x45,
-  0x57, 0x54, 0x00, 0x45, 0x50, 0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
-  0x00, 0x00, 0x00, 0x00, 0x01, 0x0a, 0x45, 0x53, 0x54, 0x35, 0x45, 0x44,
-  0x54, 0x2c, 0x4d, 0x33, 0x2e, 0x32, 0x2e, 0x30, 0x2c, 0x4d, 0x31, 0x31,
-  0x2e, 0x31, 0x2e, 0x30, 0x0a
-};
-unsigned int America_New_York_len = 3545;
-unsigned char Australia_Sydney[] = {
-  0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
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-  0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x0e, 0x80, 0x00, 0x00, 0x00,
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-  0x71, 0x59, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x72, 0x49, 0xe9, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x73, 0x39, 0xda, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x74, 0x29, 0xcb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x19, 0xbc, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x76, 0x09, 0xad, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x76, 0xf9, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x77, 0xe9, 0x8f, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x78, 0xd9, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0x79, 0xc9, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7a, 0xb9, 0x62, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0x7b, 0xb2, 0x8d, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x7c, 0xa2, 0x7e, 0x80, 0x00, 0x00, 0x00, 0x00, 0x7d, 0x92, 0x6f, 0x80,
-  0x00, 0x00, 0x00, 0x00, 0x7e, 0x82, 0x60, 0x80, 0x00, 0x00, 0x00, 0x00,
-  0x7f, 0x72, 0x51, 0x80, 0x00, 0x02, 0x01, 0x02, 0x01, 0x02, 0x01, 0x02,
-  0x01, 0x02, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04, 0x03, 0x04,
-  0x03, 0x04, 0x03, 0x00, 0x00, 0x8d, 0xc4, 0x00, 0x00, 0x00, 0x00, 0x9a,
-  0xb0, 0x01, 0x04, 0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09, 0x00, 0x00, 0x9a,
-  0xb0, 0x01, 0x04, 0x00, 0x00, 0x8c, 0xa0, 0x00, 0x09, 0x4c, 0x4d, 0x54,
-  0x00, 0x41, 0x45, 0x44, 0x54, 0x00, 0x41, 0x45, 0x53, 0x54, 0x00, 0x00,
-  0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x41, 0x45,
-  0x53, 0x54, 0x2d, 0x31, 0x30, 0x41, 0x45, 0x44, 0x54, 0x2c, 0x4d, 0x31,
-  0x30, 0x2e, 0x31, 0x2e, 0x30, 0x2c, 0x4d, 0x34, 0x2e, 0x31, 0x2e, 0x30,
-  0x2f, 0x33, 0x0a
-};
-unsigned int Australia_Sydney_len = 2223;
diff --git a/third_party/abseil/absl/time/time.cc b/third_party/abseil/absl/time/time.cc
deleted file mode 100644
index 1ec2026..0000000
--- a/third_party/abseil/absl/time/time.cc
+++ /dev/null
@@ -1,500 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// The implementation of the absl::Time class, which is declared in
-// //absl/time.h.
-//
-// The representation for an absl::Time is an absl::Duration offset from the
-// epoch.  We use the traditional Unix epoch (1970-01-01 00:00:00 +0000)
-// for convenience, but this is not exposed in the API and could be changed.
-//
-// NOTE: To keep type verbosity to a minimum, the following variable naming
-// conventions are used throughout this file.
-//
-// tz: An absl::TimeZone
-// ci: An absl::TimeZone::CivilInfo
-// ti: An absl::TimeZone::TimeInfo
-// cd: An absl::CivilDay or a cctz::civil_day
-// cs: An absl::CivilSecond or a cctz::civil_second
-// bd: An absl::Time::Breakdown
-// cl: A cctz::time_zone::civil_lookup
-// al: A cctz::time_zone::absolute_lookup
-
-#include "absl/time/time.h"
-
-#if defined(_MSC_VER)
-#include <winsock2.h>  // for timeval
-#endif
-
-#include <cstring>
-#include <ctime>
-#include <limits>
-
-#include "absl/time/internal/cctz/include/cctz/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-namespace cctz = absl::time_internal::cctz;
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-inline cctz::time_point<cctz::seconds> unix_epoch() {
-  return std::chrono::time_point_cast<cctz::seconds>(
-      std::chrono::system_clock::from_time_t(0));
-}
-
-// Floors d to the next unit boundary closer to negative infinity.
-inline int64_t FloorToUnit(absl::Duration d, absl::Duration unit) {
-  absl::Duration rem;
-  int64_t q = absl::IDivDuration(d, unit, &rem);
-  return (q > 0 || rem >= ZeroDuration() ||
-          q == std::numeric_limits<int64_t>::min())
-             ? q
-             : q - 1;
-}
-
-inline absl::Time::Breakdown InfiniteFutureBreakdown() {
-  absl::Time::Breakdown bd;
-  bd.year = std::numeric_limits<int64_t>::max();
-  bd.month = 12;
-  bd.day = 31;
-  bd.hour = 23;
-  bd.minute = 59;
-  bd.second = 59;
-  bd.subsecond = absl::InfiniteDuration();
-  bd.weekday = 4;
-  bd.yearday = 365;
-  bd.offset = 0;
-  bd.is_dst = false;
-  bd.zone_abbr = "-00";
-  return bd;
-}
-
-inline absl::Time::Breakdown InfinitePastBreakdown() {
-  Time::Breakdown bd;
-  bd.year = std::numeric_limits<int64_t>::min();
-  bd.month = 1;
-  bd.day = 1;
-  bd.hour = 0;
-  bd.minute = 0;
-  bd.second = 0;
-  bd.subsecond = -absl::InfiniteDuration();
-  bd.weekday = 7;
-  bd.yearday = 1;
-  bd.offset = 0;
-  bd.is_dst = false;
-  bd.zone_abbr = "-00";
-  return bd;
-}
-
-inline absl::TimeZone::CivilInfo InfiniteFutureCivilInfo() {
-  TimeZone::CivilInfo ci;
-  ci.cs = CivilSecond::max();
-  ci.subsecond = InfiniteDuration();
-  ci.offset = 0;
-  ci.is_dst = false;
-  ci.zone_abbr = "-00";
-  return ci;
-}
-
-inline absl::TimeZone::CivilInfo InfinitePastCivilInfo() {
-  TimeZone::CivilInfo ci;
-  ci.cs = CivilSecond::min();
-  ci.subsecond = -InfiniteDuration();
-  ci.offset = 0;
-  ci.is_dst = false;
-  ci.zone_abbr = "-00";
-  return ci;
-}
-
-inline absl::TimeConversion InfiniteFutureTimeConversion() {
-  absl::TimeConversion tc;
-  tc.pre = tc.trans = tc.post = absl::InfiniteFuture();
-  tc.kind = absl::TimeConversion::UNIQUE;
-  tc.normalized = true;
-  return tc;
-}
-
-inline TimeConversion InfinitePastTimeConversion() {
-  absl::TimeConversion tc;
-  tc.pre = tc.trans = tc.post = absl::InfinitePast();
-  tc.kind = absl::TimeConversion::UNIQUE;
-  tc.normalized = true;
-  return tc;
-}
-
-// Makes a Time from sec, overflowing to InfiniteFuture/InfinitePast as
-// necessary. If sec is min/max, then consult cs+tz to check for overlow.
-Time MakeTimeWithOverflow(const cctz::time_point<cctz::seconds>& sec,
-                          const cctz::civil_second& cs,
-                          const cctz::time_zone& tz,
-                          bool* normalized = nullptr) {
-  const auto max = cctz::time_point<cctz::seconds>::max();
-  const auto min = cctz::time_point<cctz::seconds>::min();
-  if (sec == max) {
-    const auto al = tz.lookup(max);
-    if (cs > al.cs) {
-      if (normalized) *normalized = true;
-      return absl::InfiniteFuture();
-    }
-  }
-  if (sec == min) {
-    const auto al = tz.lookup(min);
-    if (cs < al.cs) {
-      if (normalized) *normalized = true;
-      return absl::InfinitePast();
-    }
-  }
-  const auto hi = (sec - unix_epoch()).count();
-  return time_internal::FromUnixDuration(time_internal::MakeDuration(hi));
-}
-
-// Returns Mon=1..Sun=7.
-inline int MapWeekday(const cctz::weekday& wd) {
-  switch (wd) {
-    case cctz::weekday::monday:
-      return 1;
-    case cctz::weekday::tuesday:
-      return 2;
-    case cctz::weekday::wednesday:
-      return 3;
-    case cctz::weekday::thursday:
-      return 4;
-    case cctz::weekday::friday:
-      return 5;
-    case cctz::weekday::saturday:
-      return 6;
-    case cctz::weekday::sunday:
-      return 7;
-  }
-  return 1;
-}
-
-bool FindTransition(const cctz::time_zone& tz,
-                    bool (cctz::time_zone::*find_transition)(
-                        const cctz::time_point<cctz::seconds>& tp,
-                        cctz::time_zone::civil_transition* trans) const,
-                    Time t, TimeZone::CivilTransition* trans) {
-  // Transitions are second-aligned, so we can discard any fractional part.
-  const auto tp = unix_epoch() + cctz::seconds(ToUnixSeconds(t));
-  cctz::time_zone::civil_transition tr;
-  if (!(tz.*find_transition)(tp, &tr)) return false;
-  trans->from = CivilSecond(tr.from);
-  trans->to = CivilSecond(tr.to);
-  return true;
-}
-
-}  // namespace
-
-//
-// Time
-//
-
-absl::Time::Breakdown Time::In(absl::TimeZone tz) const {
-  if (*this == absl::InfiniteFuture()) return InfiniteFutureBreakdown();
-  if (*this == absl::InfinitePast()) return InfinitePastBreakdown();
-
-  const auto tp = unix_epoch() + cctz::seconds(time_internal::GetRepHi(rep_));
-  const auto al = cctz::time_zone(tz).lookup(tp);
-  const auto cs = al.cs;
-  const auto cd = cctz::civil_day(cs);
-
-  absl::Time::Breakdown bd;
-  bd.year = cs.year();
-  bd.month = cs.month();
-  bd.day = cs.day();
-  bd.hour = cs.hour();
-  bd.minute = cs.minute();
-  bd.second = cs.second();
-  bd.subsecond = time_internal::MakeDuration(0, time_internal::GetRepLo(rep_));
-  bd.weekday = MapWeekday(cctz::get_weekday(cd));
-  bd.yearday = cctz::get_yearday(cd);
-  bd.offset = al.offset;
-  bd.is_dst = al.is_dst;
-  bd.zone_abbr = al.abbr;
-  return bd;
-}
-
-//
-// Conversions from/to other time types.
-//
-
-absl::Time FromUDate(double udate) {
-  return time_internal::FromUnixDuration(absl::Milliseconds(udate));
-}
-
-absl::Time FromUniversal(int64_t universal) {
-  return absl::UniversalEpoch() + 100 * absl::Nanoseconds(universal);
-}
-
-int64_t ToUnixNanos(Time t) {
-  if (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >= 0 &&
-      time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >> 33 == 0) {
-    return (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) *
-            1000 * 1000 * 1000) +
-           (time_internal::GetRepLo(time_internal::ToUnixDuration(t)) / 4);
-  }
-  return FloorToUnit(time_internal::ToUnixDuration(t), absl::Nanoseconds(1));
-}
-
-int64_t ToUnixMicros(Time t) {
-  if (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >= 0 &&
-      time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >> 43 == 0) {
-    return (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) *
-            1000 * 1000) +
-           (time_internal::GetRepLo(time_internal::ToUnixDuration(t)) / 4000);
-  }
-  return FloorToUnit(time_internal::ToUnixDuration(t), absl::Microseconds(1));
-}
-
-int64_t ToUnixMillis(Time t) {
-  if (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >= 0 &&
-      time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >> 53 == 0) {
-    return (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) * 1000) +
-           (time_internal::GetRepLo(time_internal::ToUnixDuration(t)) /
-            (4000 * 1000));
-  }
-  return FloorToUnit(time_internal::ToUnixDuration(t), absl::Milliseconds(1));
-}
-
-int64_t ToUnixSeconds(Time t) {
-  return time_internal::GetRepHi(time_internal::ToUnixDuration(t));
-}
-
-time_t ToTimeT(Time t) { return absl::ToTimespec(t).tv_sec; }
-
-double ToUDate(Time t) {
-  return absl::FDivDuration(time_internal::ToUnixDuration(t),
-                            absl::Milliseconds(1));
-}
-
-int64_t ToUniversal(absl::Time t) {
-  return absl::FloorToUnit(t - absl::UniversalEpoch(), absl::Nanoseconds(100));
-}
-
-absl::Time TimeFromTimespec(timespec ts) {
-  return time_internal::FromUnixDuration(absl::DurationFromTimespec(ts));
-}
-
-absl::Time TimeFromTimeval(timeval tv) {
-  return time_internal::FromUnixDuration(absl::DurationFromTimeval(tv));
-}
-
-timespec ToTimespec(Time t) {
-  timespec ts;
-  absl::Duration d = time_internal::ToUnixDuration(t);
-  if (!time_internal::IsInfiniteDuration(d)) {
-    ts.tv_sec = time_internal::GetRepHi(d);
-    if (ts.tv_sec == time_internal::GetRepHi(d)) {  // no time_t narrowing
-      ts.tv_nsec = time_internal::GetRepLo(d) / 4;  // floor
-      return ts;
-    }
-  }
-  if (d >= absl::ZeroDuration()) {
-    ts.tv_sec = std::numeric_limits<time_t>::max();
-    ts.tv_nsec = 1000 * 1000 * 1000 - 1;
-  } else {
-    ts.tv_sec = std::numeric_limits<time_t>::min();
-    ts.tv_nsec = 0;
-  }
-  return ts;
-}
-
-timeval ToTimeval(Time t) {
-  timeval tv;
-  timespec ts = absl::ToTimespec(t);
-  tv.tv_sec = ts.tv_sec;
-  if (tv.tv_sec != ts.tv_sec) {  // narrowing
-    if (ts.tv_sec < 0) {
-      tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::min();
-      tv.tv_usec = 0;
-    } else {
-      tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::max();
-      tv.tv_usec = 1000 * 1000 - 1;
-    }
-    return tv;
-  }
-  tv.tv_usec = static_cast<int>(ts.tv_nsec / 1000);  // suseconds_t
-  return tv;
-}
-
-Time FromChrono(const std::chrono::system_clock::time_point& tp) {
-  return time_internal::FromUnixDuration(time_internal::FromChrono(
-      tp - std::chrono::system_clock::from_time_t(0)));
-}
-
-std::chrono::system_clock::time_point ToChronoTime(absl::Time t) {
-  using D = std::chrono::system_clock::duration;
-  auto d = time_internal::ToUnixDuration(t);
-  if (d < ZeroDuration()) d = Floor(d, FromChrono(D{1}));
-  return std::chrono::system_clock::from_time_t(0) +
-         time_internal::ToChronoDuration<D>(d);
-}
-
-//
-// TimeZone
-//
-
-absl::TimeZone::CivilInfo TimeZone::At(Time t) const {
-  if (t == absl::InfiniteFuture()) return InfiniteFutureCivilInfo();
-  if (t == absl::InfinitePast()) return InfinitePastCivilInfo();
-
-  const auto ud = time_internal::ToUnixDuration(t);
-  const auto tp = unix_epoch() + cctz::seconds(time_internal::GetRepHi(ud));
-  const auto al = cz_.lookup(tp);
-
-  TimeZone::CivilInfo ci;
-  ci.cs = CivilSecond(al.cs);
-  ci.subsecond = time_internal::MakeDuration(0, time_internal::GetRepLo(ud));
-  ci.offset = al.offset;
-  ci.is_dst = al.is_dst;
-  ci.zone_abbr = al.abbr;
-  return ci;
-}
-
-absl::TimeZone::TimeInfo TimeZone::At(CivilSecond ct) const {
-  const cctz::civil_second cs(ct);
-  const auto cl = cz_.lookup(cs);
-
-  TimeZone::TimeInfo ti;
-  switch (cl.kind) {
-    case cctz::time_zone::civil_lookup::UNIQUE:
-      ti.kind = TimeZone::TimeInfo::UNIQUE;
-      break;
-    case cctz::time_zone::civil_lookup::SKIPPED:
-      ti.kind = TimeZone::TimeInfo::SKIPPED;
-      break;
-    case cctz::time_zone::civil_lookup::REPEATED:
-      ti.kind = TimeZone::TimeInfo::REPEATED;
-      break;
-  }
-  ti.pre = MakeTimeWithOverflow(cl.pre, cs, cz_);
-  ti.trans = MakeTimeWithOverflow(cl.trans, cs, cz_);
-  ti.post = MakeTimeWithOverflow(cl.post, cs, cz_);
-  return ti;
-}
-
-bool TimeZone::NextTransition(Time t, CivilTransition* trans) const {
-  return FindTransition(cz_, &cctz::time_zone::next_transition, t, trans);
-}
-
-bool TimeZone::PrevTransition(Time t, CivilTransition* trans) const {
-  return FindTransition(cz_, &cctz::time_zone::prev_transition, t, trans);
-}
-
-//
-// Conversions involving time zones.
-//
-
-absl::TimeConversion ConvertDateTime(int64_t year, int mon, int day, int hour,
-                                     int min, int sec, TimeZone tz) {
-  // Avoids years that are too extreme for CivilSecond to normalize.
-  if (year > 300000000000) return InfiniteFutureTimeConversion();
-  if (year < -300000000000) return InfinitePastTimeConversion();
-
-  const CivilSecond cs(year, mon, day, hour, min, sec);
-  const auto ti = tz.At(cs);
-
-  TimeConversion tc;
-  tc.pre = ti.pre;
-  tc.trans = ti.trans;
-  tc.post = ti.post;
-  switch (ti.kind) {
-    case TimeZone::TimeInfo::UNIQUE:
-      tc.kind = TimeConversion::UNIQUE;
-      break;
-    case TimeZone::TimeInfo::SKIPPED:
-      tc.kind = TimeConversion::SKIPPED;
-      break;
-    case TimeZone::TimeInfo::REPEATED:
-      tc.kind = TimeConversion::REPEATED;
-      break;
-  }
-  tc.normalized = false;
-  if (year != cs.year() || mon != cs.month() || day != cs.day() ||
-      hour != cs.hour() || min != cs.minute() || sec != cs.second()) {
-    tc.normalized = true;
-  }
-  return tc;
-}
-
-absl::Time FromTM(const struct tm& tm, absl::TimeZone tz) {
-  civil_year_t tm_year = tm.tm_year;
-  // Avoids years that are too extreme for CivilSecond to normalize.
-  if (tm_year > 300000000000ll) return InfiniteFuture();
-  if (tm_year < -300000000000ll) return InfinitePast();
-  int tm_mon = tm.tm_mon;
-  if (tm_mon == std::numeric_limits<int>::max()) {
-    tm_mon -= 12;
-    tm_year += 1;
-  }
-  const auto ti = tz.At(CivilSecond(tm_year + 1900, tm_mon + 1, tm.tm_mday,
-                                    tm.tm_hour, tm.tm_min, tm.tm_sec));
-  return tm.tm_isdst == 0 ? ti.post : ti.pre;
-}
-
-struct tm ToTM(absl::Time t, absl::TimeZone tz) {
-  struct tm tm = {};
-
-  const auto ci = tz.At(t);
-  const auto& cs = ci.cs;
-  tm.tm_sec = cs.second();
-  tm.tm_min = cs.minute();
-  tm.tm_hour = cs.hour();
-  tm.tm_mday = cs.day();
-  tm.tm_mon = cs.month() - 1;
-
-  // Saturates tm.tm_year in cases of over/underflow, accounting for the fact
-  // that tm.tm_year is years since 1900.
-  if (cs.year() < std::numeric_limits<int>::min() + 1900) {
-    tm.tm_year = std::numeric_limits<int>::min();
-  } else if (cs.year() > std::numeric_limits<int>::max()) {
-    tm.tm_year = std::numeric_limits<int>::max() - 1900;
-  } else {
-    tm.tm_year = static_cast<int>(cs.year() - 1900);
-  }
-
-  switch (GetWeekday(cs)) {
-    case Weekday::sunday:
-      tm.tm_wday = 0;
-      break;
-    case Weekday::monday:
-      tm.tm_wday = 1;
-      break;
-    case Weekday::tuesday:
-      tm.tm_wday = 2;
-      break;
-    case Weekday::wednesday:
-      tm.tm_wday = 3;
-      break;
-    case Weekday::thursday:
-      tm.tm_wday = 4;
-      break;
-    case Weekday::friday:
-      tm.tm_wday = 5;
-      break;
-    case Weekday::saturday:
-      tm.tm_wday = 6;
-      break;
-  }
-  tm.tm_yday = GetYearDay(cs) - 1;
-  tm.tm_isdst = ci.is_dst ? 1 : 0;
-
-  return tm;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/time/time.h b/third_party/abseil/absl/time/time.h
deleted file mode 100644
index 7250803..0000000
--- a/third_party/abseil/absl/time/time.h
+++ /dev/null
@@ -1,1581 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// File: time.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines abstractions for computing with absolute points
-// in time, durations of time, and formatting and parsing time within a given
-// time zone. The following abstractions are defined:
-//
-//  * `absl::Time` defines an absolute, specific instance in time
-//  * `absl::Duration` defines a signed, fixed-length span of time
-//  * `absl::TimeZone` defines geopolitical time zone regions (as collected
-//     within the IANA Time Zone database (https://www.iana.org/time-zones)).
-//
-// Note: Absolute times are distinct from civil times, which refer to the
-// human-scale time commonly represented by `YYYY-MM-DD hh:mm:ss`. The mapping
-// between absolute and civil times can be specified by use of time zones
-// (`absl::TimeZone` within this API). That is:
-//
-//   Civil Time = F(Absolute Time, Time Zone)
-//   Absolute Time = G(Civil Time, Time Zone)
-//
-// See civil_time.h for abstractions related to constructing and manipulating
-// civil time.
-//
-// Example:
-//
-//   absl::TimeZone nyc;
-//   // LoadTimeZone() may fail so it's always better to check for success.
-//   if (!absl::LoadTimeZone("America/New_York", &nyc)) {
-//      // handle error case
-//   }
-//
-//   // My flight leaves NYC on Jan 2, 2017 at 03:04:05
-//   absl::CivilSecond cs(2017, 1, 2, 3, 4, 5);
-//   absl::Time takeoff = absl::FromCivil(cs, nyc);
-//
-//   absl::Duration flight_duration = absl::Hours(21) + absl::Minutes(35);
-//   absl::Time landing = takeoff + flight_duration;
-//
-//   absl::TimeZone syd;
-//   if (!absl::LoadTimeZone("Australia/Sydney", &syd)) {
-//      // handle error case
-//   }
-//   std::string s = absl::FormatTime(
-//       "My flight will land in Sydney on %Y-%m-%d at %H:%M:%S",
-//       landing, syd);
-
-#ifndef ABSL_TIME_TIME_H_
-#define ABSL_TIME_TIME_H_
-
-#if !defined(_MSC_VER)
-#include <sys/time.h>
-#else
-// We don't include `winsock2.h` because it drags in `windows.h` and friends,
-// and they define conflicting macros like OPAQUE, ERROR, and more. This has the
-// potential to break Abseil users.
-//
-// Instead we only forward declare `timeval` and require Windows users include
-// `winsock2.h` themselves. This is both inconsistent and troublesome, but so is
-// including 'windows.h' so we are picking the lesser of two evils here.
-struct timeval;
-#endif
-#include <chrono>  // NOLINT(build/c++11)
-#include <cmath>
-#include <cstdint>
-#include <ctime>
-#include <ostream>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/macros.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/civil_time.h"
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class Duration;  // Defined below
-class Time;      // Defined below
-class TimeZone;  // Defined below
-
-namespace time_internal {
-int64_t IDivDuration(bool satq, Duration num, Duration den, Duration* rem);
-constexpr Time FromUnixDuration(Duration d);
-constexpr Duration ToUnixDuration(Time t);
-constexpr int64_t GetRepHi(Duration d);
-constexpr uint32_t GetRepLo(Duration d);
-constexpr Duration MakeDuration(int64_t hi, uint32_t lo);
-constexpr Duration MakeDuration(int64_t hi, int64_t lo);
-inline Duration MakePosDoubleDuration(double n);
-constexpr int64_t kTicksPerNanosecond = 4;
-constexpr int64_t kTicksPerSecond = 1000 * 1000 * 1000 * kTicksPerNanosecond;
-template <std::intmax_t N>
-constexpr Duration FromInt64(int64_t v, std::ratio<1, N>);
-constexpr Duration FromInt64(int64_t v, std::ratio<60>);
-constexpr Duration FromInt64(int64_t v, std::ratio<3600>);
-template <typename T>
-using EnableIfIntegral = typename std::enable_if<
-    std::is_integral<T>::value || std::is_enum<T>::value, int>::type;
-template <typename T>
-using EnableIfFloat =
-    typename std::enable_if<std::is_floating_point<T>::value, int>::type;
-}  // namespace time_internal
-
-// Duration
-//
-// The `absl::Duration` class represents a signed, fixed-length span of time.
-// A `Duration` is generated using a unit-specific factory function, or is
-// the result of subtracting one `absl::Time` from another. Durations behave
-// like unit-safe integers and they support all the natural integer-like
-// arithmetic operations. Arithmetic overflows and saturates at +/- infinity.
-// `Duration` should be passed by value rather than const reference.
-//
-// Factory functions `Nanoseconds()`, `Microseconds()`, `Milliseconds()`,
-// `Seconds()`, `Minutes()`, `Hours()` and `InfiniteDuration()` allow for
-// creation of constexpr `Duration` values
-//
-// Examples:
-//
-//   constexpr absl::Duration ten_ns = absl::Nanoseconds(10);
-//   constexpr absl::Duration min = absl::Minutes(1);
-//   constexpr absl::Duration hour = absl::Hours(1);
-//   absl::Duration dur = 60 * min;  // dur == hour
-//   absl::Duration half_sec = absl::Milliseconds(500);
-//   absl::Duration quarter_sec = 0.25 * absl::Seconds(1);
-//
-// `Duration` values can be easily converted to an integral number of units
-// using the division operator.
-//
-// Example:
-//
-//   constexpr absl::Duration dur = absl::Milliseconds(1500);
-//   int64_t ns = dur / absl::Nanoseconds(1);   // ns == 1500000000
-//   int64_t ms = dur / absl::Milliseconds(1);  // ms == 1500
-//   int64_t sec = dur / absl::Seconds(1);    // sec == 1 (subseconds truncated)
-//   int64_t min = dur / absl::Minutes(1);    // min == 0
-//
-// See the `IDivDuration()` and `FDivDuration()` functions below for details on
-// how to access the fractional parts of the quotient.
-//
-// Alternatively, conversions can be performed using helpers such as
-// `ToInt64Microseconds()` and `ToDoubleSeconds()`.
-class Duration {
- public:
-  // Value semantics.
-  constexpr Duration() : rep_hi_(0), rep_lo_(0) {}  // zero-length duration
-
-  // Copyable.
-#if !defined(__clang__) && defined(_MSC_VER) && _MSC_VER < 1910
-  // Explicitly defining the constexpr copy constructor avoids an MSVC bug.
-  constexpr Duration(const Duration& d)
-      : rep_hi_(d.rep_hi_), rep_lo_(d.rep_lo_) {}
-#else
-  constexpr Duration(const Duration& d) = default;
-#endif
-  Duration& operator=(const Duration& d) = default;
-
-  // Compound assignment operators.
-  Duration& operator+=(Duration d);
-  Duration& operator-=(Duration d);
-  Duration& operator*=(int64_t r);
-  Duration& operator*=(double r);
-  Duration& operator/=(int64_t r);
-  Duration& operator/=(double r);
-  Duration& operator%=(Duration rhs);
-
-  // Overloads that forward to either the int64_t or double overloads above.
-  // Integer operands must be representable as int64_t.
-  template <typename T>
-  Duration& operator*=(T r) {
-    int64_t x = r;
-    return *this *= x;
-  }
-  template <typename T>
-  Duration& operator/=(T r) {
-    int64_t x = r;
-    return *this /= x;
-  }
-  Duration& operator*=(float r) { return *this *= static_cast<double>(r); }
-  Duration& operator/=(float r) { return *this /= static_cast<double>(r); }
-
-  template <typename H>
-  friend H AbslHashValue(H h, Duration d) {
-    return H::combine(std::move(h), d.rep_hi_, d.rep_lo_);
-  }
-
- private:
-  friend constexpr int64_t time_internal::GetRepHi(Duration d);
-  friend constexpr uint32_t time_internal::GetRepLo(Duration d);
-  friend constexpr Duration time_internal::MakeDuration(int64_t hi,
-                                                        uint32_t lo);
-  constexpr Duration(int64_t hi, uint32_t lo) : rep_hi_(hi), rep_lo_(lo) {}
-  int64_t rep_hi_;
-  uint32_t rep_lo_;
-};
-
-// Relational Operators
-constexpr bool operator<(Duration lhs, Duration rhs);
-constexpr bool operator>(Duration lhs, Duration rhs) { return rhs < lhs; }
-constexpr bool operator>=(Duration lhs, Duration rhs) { return !(lhs < rhs); }
-constexpr bool operator<=(Duration lhs, Duration rhs) { return !(rhs < lhs); }
-constexpr bool operator==(Duration lhs, Duration rhs);
-constexpr bool operator!=(Duration lhs, Duration rhs) { return !(lhs == rhs); }
-
-// Additive Operators
-constexpr Duration operator-(Duration d);
-inline Duration operator+(Duration lhs, Duration rhs) { return lhs += rhs; }
-inline Duration operator-(Duration lhs, Duration rhs) { return lhs -= rhs; }
-
-// Multiplicative Operators
-// Integer operands must be representable as int64_t.
-template <typename T>
-Duration operator*(Duration lhs, T rhs) {
-  return lhs *= rhs;
-}
-template <typename T>
-Duration operator*(T lhs, Duration rhs) {
-  return rhs *= lhs;
-}
-template <typename T>
-Duration operator/(Duration lhs, T rhs) {
-  return lhs /= rhs;
-}
-inline int64_t operator/(Duration lhs, Duration rhs) {
-  return time_internal::IDivDuration(true, lhs, rhs,
-                                     &lhs);  // trunc towards zero
-}
-inline Duration operator%(Duration lhs, Duration rhs) { return lhs %= rhs; }
-
-// IDivDuration()
-//
-// Divides a numerator `Duration` by a denominator `Duration`, returning the
-// quotient and remainder. The remainder always has the same sign as the
-// numerator. The returned quotient and remainder respect the identity:
-//
-//   numerator = denominator * quotient + remainder
-//
-// Returned quotients are capped to the range of `int64_t`, with the difference
-// spilling into the remainder to uphold the above identity. This means that the
-// remainder returned could differ from the remainder returned by
-// `Duration::operator%` for huge quotients.
-//
-// See also the notes on `InfiniteDuration()` below regarding the behavior of
-// division involving zero and infinite durations.
-//
-// Example:
-//
-//   constexpr absl::Duration a =
-//       absl::Seconds(std::numeric_limits<int64_t>::max());  // big
-//   constexpr absl::Duration b = absl::Nanoseconds(1);       // small
-//
-//   absl::Duration rem = a % b;
-//   // rem == absl::ZeroDuration()
-//
-//   // Here, q would overflow int64_t, so rem accounts for the difference.
-//   int64_t q = absl::IDivDuration(a, b, &rem);
-//   // q == std::numeric_limits<int64_t>::max(), rem == a - b * q
-inline int64_t IDivDuration(Duration num, Duration den, Duration* rem) {
-  return time_internal::IDivDuration(true, num, den,
-                                     rem);  // trunc towards zero
-}
-
-// FDivDuration()
-//
-// Divides a `Duration` numerator into a fractional number of units of a
-// `Duration` denominator.
-//
-// See also the notes on `InfiniteDuration()` below regarding the behavior of
-// division involving zero and infinite durations.
-//
-// Example:
-//
-//   double d = absl::FDivDuration(absl::Milliseconds(1500), absl::Seconds(1));
-//   // d == 1.5
-double FDivDuration(Duration num, Duration den);
-
-// ZeroDuration()
-//
-// Returns a zero-length duration. This function behaves just like the default
-// constructor, but the name helps make the semantics clear at call sites.
-constexpr Duration ZeroDuration() { return Duration(); }
-
-// AbsDuration()
-//
-// Returns the absolute value of a duration.
-inline Duration AbsDuration(Duration d) {
-  return (d < ZeroDuration()) ? -d : d;
-}
-
-// Trunc()
-//
-// Truncates a duration (toward zero) to a multiple of a non-zero unit.
-//
-// Example:
-//
-//   absl::Duration d = absl::Nanoseconds(123456789);
-//   absl::Duration a = absl::Trunc(d, absl::Microseconds(1));  // 123456us
-Duration Trunc(Duration d, Duration unit);
-
-// Floor()
-//
-// Floors a duration using the passed duration unit to its largest value not
-// greater than the duration.
-//
-// Example:
-//
-//   absl::Duration d = absl::Nanoseconds(123456789);
-//   absl::Duration b = absl::Floor(d, absl::Microseconds(1));  // 123456us
-Duration Floor(Duration d, Duration unit);
-
-// Ceil()
-//
-// Returns the ceiling of a duration using the passed duration unit to its
-// smallest value not less than the duration.
-//
-// Example:
-//
-//   absl::Duration d = absl::Nanoseconds(123456789);
-//   absl::Duration c = absl::Ceil(d, absl::Microseconds(1));   // 123457us
-Duration Ceil(Duration d, Duration unit);
-
-// InfiniteDuration()
-//
-// Returns an infinite `Duration`.  To get a `Duration` representing negative
-// infinity, use `-InfiniteDuration()`.
-//
-// Duration arithmetic overflows to +/- infinity and saturates. In general,
-// arithmetic with `Duration` infinities is similar to IEEE 754 infinities
-// except where IEEE 754 NaN would be involved, in which case +/-
-// `InfiniteDuration()` is used in place of a "nan" Duration.
-//
-// Examples:
-//
-//   constexpr absl::Duration inf = absl::InfiniteDuration();
-//   const absl::Duration d = ... any finite duration ...
-//
-//   inf == inf + inf
-//   inf == inf + d
-//   inf == inf - inf
-//   -inf == d - inf
-//
-//   inf == d * 1e100
-//   inf == inf / 2
-//   0 == d / inf
-//   INT64_MAX == inf / d
-//
-//   d < inf
-//   -inf < d
-//
-//   // Division by zero returns infinity, or INT64_MIN/MAX where appropriate.
-//   inf == d / 0
-//   INT64_MAX == d / absl::ZeroDuration()
-//
-// The examples involving the `/` operator above also apply to `IDivDuration()`
-// and `FDivDuration()`.
-constexpr Duration InfiniteDuration();
-
-// Nanoseconds()
-// Microseconds()
-// Milliseconds()
-// Seconds()
-// Minutes()
-// Hours()
-//
-// Factory functions for constructing `Duration` values from an integral number
-// of the unit indicated by the factory function's name. The number must be
-// representable as int64_t.
-//
-// NOTE: no "Days()" factory function exists because "a day" is ambiguous.
-// Civil days are not always 24 hours long, and a 24-hour duration often does
-// not correspond with a civil day. If a 24-hour duration is needed, use
-// `absl::Hours(24)`. If you actually want a civil day, use absl::CivilDay
-// from civil_time.h.
-//
-// Example:
-//
-//   absl::Duration a = absl::Seconds(60);
-//   absl::Duration b = absl::Minutes(1);  // b == a
-constexpr Duration Nanoseconds(int64_t n);
-constexpr Duration Microseconds(int64_t n);
-constexpr Duration Milliseconds(int64_t n);
-constexpr Duration Seconds(int64_t n);
-constexpr Duration Minutes(int64_t n);
-constexpr Duration Hours(int64_t n);
-
-// Factory overloads for constructing `Duration` values from a floating-point
-// number of the unit indicated by the factory function's name. These functions
-// exist for convenience, but they are not as efficient as the integral
-// factories, which should be preferred.
-//
-// Example:
-//
-//   auto a = absl::Seconds(1.5);        // OK
-//   auto b = absl::Milliseconds(1500);  // BETTER
-template <typename T, time_internal::EnableIfFloat<T> = 0>
-Duration Nanoseconds(T n) {
-  return n * Nanoseconds(1);
-}
-template <typename T, time_internal::EnableIfFloat<T> = 0>
-Duration Microseconds(T n) {
-  return n * Microseconds(1);
-}
-template <typename T, time_internal::EnableIfFloat<T> = 0>
-Duration Milliseconds(T n) {
-  return n * Milliseconds(1);
-}
-template <typename T, time_internal::EnableIfFloat<T> = 0>
-Duration Seconds(T n) {
-  if (n >= 0) {  // Note: `NaN >= 0` is false.
-    if (n >= static_cast<T>((std::numeric_limits<int64_t>::max)())) {
-      return InfiniteDuration();
-    }
-    return time_internal::MakePosDoubleDuration(n);
-  } else {
-    if (std::isnan(n))
-      return std::signbit(n) ? -InfiniteDuration() : InfiniteDuration();
-    if (n <= (std::numeric_limits<int64_t>::min)()) return -InfiniteDuration();
-    return -time_internal::MakePosDoubleDuration(-n);
-  }
-}
-template <typename T, time_internal::EnableIfFloat<T> = 0>
-Duration Minutes(T n) {
-  return n * Minutes(1);
-}
-template <typename T, time_internal::EnableIfFloat<T> = 0>
-Duration Hours(T n) {
-  return n * Hours(1);
-}
-
-// ToInt64Nanoseconds()
-// ToInt64Microseconds()
-// ToInt64Milliseconds()
-// ToInt64Seconds()
-// ToInt64Minutes()
-// ToInt64Hours()
-//
-// Helper functions that convert a Duration to an integral count of the
-// indicated unit. These functions are shorthand for the `IDivDuration()`
-// function above; see its documentation for details about overflow, etc.
-//
-// Example:
-//
-//   absl::Duration d = absl::Milliseconds(1500);
-//   int64_t isec = absl::ToInt64Seconds(d);  // isec == 1
-int64_t ToInt64Nanoseconds(Duration d);
-int64_t ToInt64Microseconds(Duration d);
-int64_t ToInt64Milliseconds(Duration d);
-int64_t ToInt64Seconds(Duration d);
-int64_t ToInt64Minutes(Duration d);
-int64_t ToInt64Hours(Duration d);
-
-// ToDoubleNanoSeconds()
-// ToDoubleMicroseconds()
-// ToDoubleMilliseconds()
-// ToDoubleSeconds()
-// ToDoubleMinutes()
-// ToDoubleHours()
-//
-// Helper functions that convert a Duration to a floating point count of the
-// indicated unit. These functions are shorthand for the `FDivDuration()`
-// function above; see its documentation for details about overflow, etc.
-//
-// Example:
-//
-//   absl::Duration d = absl::Milliseconds(1500);
-//   double dsec = absl::ToDoubleSeconds(d);  // dsec == 1.5
-double ToDoubleNanoseconds(Duration d);
-double ToDoubleMicroseconds(Duration d);
-double ToDoubleMilliseconds(Duration d);
-double ToDoubleSeconds(Duration d);
-double ToDoubleMinutes(Duration d);
-double ToDoubleHours(Duration d);
-
-// FromChrono()
-//
-// Converts any of the pre-defined std::chrono durations to an absl::Duration.
-//
-// Example:
-//
-//   std::chrono::milliseconds ms(123);
-//   absl::Duration d = absl::FromChrono(ms);
-constexpr Duration FromChrono(const std::chrono::nanoseconds& d);
-constexpr Duration FromChrono(const std::chrono::microseconds& d);
-constexpr Duration FromChrono(const std::chrono::milliseconds& d);
-constexpr Duration FromChrono(const std::chrono::seconds& d);
-constexpr Duration FromChrono(const std::chrono::minutes& d);
-constexpr Duration FromChrono(const std::chrono::hours& d);
-
-// ToChronoNanoseconds()
-// ToChronoMicroseconds()
-// ToChronoMilliseconds()
-// ToChronoSeconds()
-// ToChronoMinutes()
-// ToChronoHours()
-//
-// Converts an absl::Duration to any of the pre-defined std::chrono durations.
-// If overflow would occur, the returned value will saturate at the min/max
-// chrono duration value instead.
-//
-// Example:
-//
-//   absl::Duration d = absl::Microseconds(123);
-//   auto x = absl::ToChronoMicroseconds(d);
-//   auto y = absl::ToChronoNanoseconds(d);  // x == y
-//   auto z = absl::ToChronoSeconds(absl::InfiniteDuration());
-//   // z == std::chrono::seconds::max()
-std::chrono::nanoseconds ToChronoNanoseconds(Duration d);
-std::chrono::microseconds ToChronoMicroseconds(Duration d);
-std::chrono::milliseconds ToChronoMilliseconds(Duration d);
-std::chrono::seconds ToChronoSeconds(Duration d);
-std::chrono::minutes ToChronoMinutes(Duration d);
-std::chrono::hours ToChronoHours(Duration d);
-
-// FormatDuration()
-//
-// Returns a string representing the duration in the form "72h3m0.5s".
-// Returns "inf" or "-inf" for +/- `InfiniteDuration()`.
-std::string FormatDuration(Duration d);
-
-// Output stream operator.
-inline std::ostream& operator<<(std::ostream& os, Duration d) {
-  return os << FormatDuration(d);
-}
-
-// ParseDuration()
-//
-// Parses a duration string consisting of a possibly signed sequence of
-// decimal numbers, each with an optional fractional part and a unit
-// suffix.  The valid suffixes are "ns", "us" "ms", "s", "m", and "h".
-// Simple examples include "300ms", "-1.5h", and "2h45m".  Parses "0" as
-// `ZeroDuration()`. Parses "inf" and "-inf" as +/- `InfiniteDuration()`.
-bool ParseDuration(absl::string_view dur_string, Duration* d);
-
-// Support for flag values of type Duration. Duration flags must be specified
-// in a format that is valid input for absl::ParseDuration().
-bool AbslParseFlag(absl::string_view text, Duration* dst, std::string* error);
-std::string AbslUnparseFlag(Duration d);
-ABSL_DEPRECATED("Use AbslParseFlag() instead.")
-bool ParseFlag(const std::string& text, Duration* dst, std::string* error);
-ABSL_DEPRECATED("Use AbslUnparseFlag() instead.")
-std::string UnparseFlag(Duration d);
-
-// Time
-//
-// An `absl::Time` represents a specific instant in time. Arithmetic operators
-// are provided for naturally expressing time calculations. Instances are
-// created using `absl::Now()` and the `absl::From*()` factory functions that
-// accept the gamut of other time representations. Formatting and parsing
-// functions are provided for conversion to and from strings.  `absl::Time`
-// should be passed by value rather than const reference.
-//
-// `absl::Time` assumes there are 60 seconds in a minute, which means the
-// underlying time scales must be "smeared" to eliminate leap seconds.
-// See https://developers.google.com/time/smear.
-//
-// Even though `absl::Time` supports a wide range of timestamps, exercise
-// caution when using values in the distant past. `absl::Time` uses the
-// Proleptic Gregorian calendar, which extends the Gregorian calendar backward
-// to dates before its introduction in 1582.
-// See https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar
-// for more information. Use the ICU calendar classes to convert a date in
-// some other calendar (http://userguide.icu-project.org/datetime/calendar).
-//
-// Similarly, standardized time zones are a reasonably recent innovation, with
-// the Greenwich prime meridian being established in 1884. The TZ database
-// itself does not profess accurate offsets for timestamps prior to 1970. The
-// breakdown of future timestamps is subject to the whim of regional
-// governments.
-//
-// The `absl::Time` class represents an instant in time as a count of clock
-// ticks of some granularity (resolution) from some starting point (epoch).
-//
-// `absl::Time` uses a resolution that is high enough to avoid loss in
-// precision, and a range that is wide enough to avoid overflow, when
-// converting between tick counts in most Google time scales (i.e., resolution
-// of at least one nanosecond, and range +/-100 billion years).  Conversions
-// between the time scales are performed by truncating (towards negative
-// infinity) to the nearest representable point.
-//
-// Examples:
-//
-//   absl::Time t1 = ...;
-//   absl::Time t2 = t1 + absl::Minutes(2);
-//   absl::Duration d = t2 - t1;  // == absl::Minutes(2)
-//
-class Time {
- public:
-  // Value semantics.
-
-  // Returns the Unix epoch.  However, those reading your code may not know
-  // or expect the Unix epoch as the default value, so make your code more
-  // readable by explicitly initializing all instances before use.
-  //
-  // Example:
-  //   absl::Time t = absl::UnixEpoch();
-  //   absl::Time t = absl::Now();
-  //   absl::Time t = absl::TimeFromTimeval(tv);
-  //   absl::Time t = absl::InfinitePast();
-  constexpr Time() = default;
-
-  // Copyable.
-  constexpr Time(const Time& t) = default;
-  Time& operator=(const Time& t) = default;
-
-  // Assignment operators.
-  Time& operator+=(Duration d) {
-    rep_ += d;
-    return *this;
-  }
-  Time& operator-=(Duration d) {
-    rep_ -= d;
-    return *this;
-  }
-
-  // Time::Breakdown
-  //
-  // The calendar and wall-clock (aka "civil time") components of an
-  // `absl::Time` in a certain `absl::TimeZone`. This struct is not
-  // intended to represent an instant in time. So, rather than passing
-  // a `Time::Breakdown` to a function, pass an `absl::Time` and an
-  // `absl::TimeZone`.
-  //
-  // Deprecated. Use `absl::TimeZone::CivilInfo`.
-  struct
-      Breakdown {
-    int64_t year;        // year (e.g., 2013)
-    int month;           // month of year [1:12]
-    int day;             // day of month [1:31]
-    int hour;            // hour of day [0:23]
-    int minute;          // minute of hour [0:59]
-    int second;          // second of minute [0:59]
-    Duration subsecond;  // [Seconds(0):Seconds(1)) if finite
-    int weekday;         // 1==Mon, ..., 7=Sun
-    int yearday;         // day of year [1:366]
-
-    // Note: The following fields exist for backward compatibility
-    // with older APIs.  Accessing these fields directly is a sign of
-    // imprudent logic in the calling code.  Modern time-related code
-    // should only access this data indirectly by way of FormatTime().
-    // These fields are undefined for InfiniteFuture() and InfinitePast().
-    int offset;             // seconds east of UTC
-    bool is_dst;            // is offset non-standard?
-    const char* zone_abbr;  // time-zone abbreviation (e.g., "PST")
-  };
-
-  // Time::In()
-  //
-  // Returns the breakdown of this instant in the given TimeZone.
-  //
-  // Deprecated. Use `absl::TimeZone::At(Time)`.
-  Breakdown In(TimeZone tz) const;
-
-  template <typename H>
-  friend H AbslHashValue(H h, Time t) {
-    return H::combine(std::move(h), t.rep_);
-  }
-
- private:
-  friend constexpr Time time_internal::FromUnixDuration(Duration d);
-  friend constexpr Duration time_internal::ToUnixDuration(Time t);
-  friend constexpr bool operator<(Time lhs, Time rhs);
-  friend constexpr bool operator==(Time lhs, Time rhs);
-  friend Duration operator-(Time lhs, Time rhs);
-  friend constexpr Time UniversalEpoch();
-  friend constexpr Time InfiniteFuture();
-  friend constexpr Time InfinitePast();
-  constexpr explicit Time(Duration rep) : rep_(rep) {}
-  Duration rep_;
-};
-
-// Relational Operators
-constexpr bool operator<(Time lhs, Time rhs) { return lhs.rep_ < rhs.rep_; }
-constexpr bool operator>(Time lhs, Time rhs) { return rhs < lhs; }
-constexpr bool operator>=(Time lhs, Time rhs) { return !(lhs < rhs); }
-constexpr bool operator<=(Time lhs, Time rhs) { return !(rhs < lhs); }
-constexpr bool operator==(Time lhs, Time rhs) { return lhs.rep_ == rhs.rep_; }
-constexpr bool operator!=(Time lhs, Time rhs) { return !(lhs == rhs); }
-
-// Additive Operators
-inline Time operator+(Time lhs, Duration rhs) { return lhs += rhs; }
-inline Time operator+(Duration lhs, Time rhs) { return rhs += lhs; }
-inline Time operator-(Time lhs, Duration rhs) { return lhs -= rhs; }
-inline Duration operator-(Time lhs, Time rhs) { return lhs.rep_ - rhs.rep_; }
-
-// UnixEpoch()
-//
-// Returns the `absl::Time` representing "1970-01-01 00:00:00.0 +0000".
-constexpr Time UnixEpoch() { return Time(); }
-
-// UniversalEpoch()
-//
-// Returns the `absl::Time` representing "0001-01-01 00:00:00.0 +0000", the
-// epoch of the ICU Universal Time Scale.
-constexpr Time UniversalEpoch() {
-  // 719162 is the number of days from 0001-01-01 to 1970-01-01,
-  // assuming the Gregorian calendar.
-  return Time(time_internal::MakeDuration(-24 * 719162 * int64_t{3600}, 0U));
-}
-
-// InfiniteFuture()
-//
-// Returns an `absl::Time` that is infinitely far in the future.
-constexpr Time InfiniteFuture() {
-  return Time(
-      time_internal::MakeDuration((std::numeric_limits<int64_t>::max)(), ~0U));
-}
-
-// InfinitePast()
-//
-// Returns an `absl::Time` that is infinitely far in the past.
-constexpr Time InfinitePast() {
-  return Time(
-      time_internal::MakeDuration((std::numeric_limits<int64_t>::min)(), ~0U));
-}
-
-// FromUnixNanos()
-// FromUnixMicros()
-// FromUnixMillis()
-// FromUnixSeconds()
-// FromTimeT()
-// FromUDate()
-// FromUniversal()
-//
-// Creates an `absl::Time` from a variety of other representations.
-constexpr Time FromUnixNanos(int64_t ns);
-constexpr Time FromUnixMicros(int64_t us);
-constexpr Time FromUnixMillis(int64_t ms);
-constexpr Time FromUnixSeconds(int64_t s);
-constexpr Time FromTimeT(time_t t);
-Time FromUDate(double udate);
-Time FromUniversal(int64_t universal);
-
-// ToUnixNanos()
-// ToUnixMicros()
-// ToUnixMillis()
-// ToUnixSeconds()
-// ToTimeT()
-// ToUDate()
-// ToUniversal()
-//
-// Converts an `absl::Time` to a variety of other representations.  Note that
-// these operations round down toward negative infinity where necessary to
-// adjust to the resolution of the result type.  Beware of possible time_t
-// over/underflow in ToTime{T,val,spec}() on 32-bit platforms.
-int64_t ToUnixNanos(Time t);
-int64_t ToUnixMicros(Time t);
-int64_t ToUnixMillis(Time t);
-int64_t ToUnixSeconds(Time t);
-time_t ToTimeT(Time t);
-double ToUDate(Time t);
-int64_t ToUniversal(Time t);
-
-// DurationFromTimespec()
-// DurationFromTimeval()
-// ToTimespec()
-// ToTimeval()
-// TimeFromTimespec()
-// TimeFromTimeval()
-// ToTimespec()
-// ToTimeval()
-//
-// Some APIs use a timespec or a timeval as a Duration (e.g., nanosleep(2)
-// and select(2)), while others use them as a Time (e.g. clock_gettime(2)
-// and gettimeofday(2)), so conversion functions are provided for both cases.
-// The "to timespec/val" direction is easily handled via overloading, but
-// for "from timespec/val" the desired type is part of the function name.
-Duration DurationFromTimespec(timespec ts);
-Duration DurationFromTimeval(timeval tv);
-timespec ToTimespec(Duration d);
-timeval ToTimeval(Duration d);
-Time TimeFromTimespec(timespec ts);
-Time TimeFromTimeval(timeval tv);
-timespec ToTimespec(Time t);
-timeval ToTimeval(Time t);
-
-// FromChrono()
-//
-// Converts a std::chrono::system_clock::time_point to an absl::Time.
-//
-// Example:
-//
-//   auto tp = std::chrono::system_clock::from_time_t(123);
-//   absl::Time t = absl::FromChrono(tp);
-//   // t == absl::FromTimeT(123)
-Time FromChrono(const std::chrono::system_clock::time_point& tp);
-
-// ToChronoTime()
-//
-// Converts an absl::Time to a std::chrono::system_clock::time_point. If
-// overflow would occur, the returned value will saturate at the min/max time
-// point value instead.
-//
-// Example:
-//
-//   absl::Time t = absl::FromTimeT(123);
-//   auto tp = absl::ToChronoTime(t);
-//   // tp == std::chrono::system_clock::from_time_t(123);
-std::chrono::system_clock::time_point ToChronoTime(Time);
-
-// Support for flag values of type Time. Time flags must be specified in a
-// format that matches absl::RFC3339_full. For example:
-//
-//   --start_time=2016-01-02T03:04:05.678+08:00
-//
-// Note: A UTC offset (or 'Z' indicating a zero-offset from UTC) is required.
-//
-// Additionally, if you'd like to specify a time as a count of
-// seconds/milliseconds/etc from the Unix epoch, use an absl::Duration flag
-// and add that duration to absl::UnixEpoch() to get an absl::Time.
-bool AbslParseFlag(absl::string_view text, Time* t, std::string* error);
-std::string AbslUnparseFlag(Time t);
-ABSL_DEPRECATED("Use AbslParseFlag() instead.")
-bool ParseFlag(const std::string& text, Time* t, std::string* error);
-ABSL_DEPRECATED("Use AbslUnparseFlag() instead.")
-std::string UnparseFlag(Time t);
-
-// TimeZone
-//
-// The `absl::TimeZone` is an opaque, small, value-type class representing a
-// geo-political region within which particular rules are used for converting
-// between absolute and civil times (see https://git.io/v59Ly). `absl::TimeZone`
-// values are named using the TZ identifiers from the IANA Time Zone Database,
-// such as "America/Los_Angeles" or "Australia/Sydney". `absl::TimeZone` values
-// are created from factory functions such as `absl::LoadTimeZone()`. Note:
-// strings like "PST" and "EDT" are not valid TZ identifiers. Prefer to pass by
-// value rather than const reference.
-//
-// For more on the fundamental concepts of time zones, absolute times, and civil
-// times, see https://github.com/google/cctz#fundamental-concepts
-//
-// Examples:
-//
-//   absl::TimeZone utc = absl::UTCTimeZone();
-//   absl::TimeZone pst = absl::FixedTimeZone(-8 * 60 * 60);
-//   absl::TimeZone loc = absl::LocalTimeZone();
-//   absl::TimeZone lax;
-//   if (!absl::LoadTimeZone("America/Los_Angeles", &lax)) {
-//     // handle error case
-//   }
-//
-// See also:
-// - https://github.com/google/cctz
-// - https://www.iana.org/time-zones
-// - https://en.wikipedia.org/wiki/Zoneinfo
-class TimeZone {
- public:
-  explicit TimeZone(time_internal::cctz::time_zone tz) : cz_(tz) {}
-  TimeZone() = default;  // UTC, but prefer UTCTimeZone() to be explicit.
-
-  // Copyable.
-  TimeZone(const TimeZone&) = default;
-  TimeZone& operator=(const TimeZone&) = default;
-
-  explicit operator time_internal::cctz::time_zone() const { return cz_; }
-
-  std::string name() const { return cz_.name(); }
-
-  // TimeZone::CivilInfo
-  //
-  // Information about the civil time corresponding to an absolute time.
-  // This struct is not intended to represent an instant in time. So, rather
-  // than passing a `TimeZone::CivilInfo` to a function, pass an `absl::Time`
-  // and an `absl::TimeZone`.
-  struct CivilInfo {
-    CivilSecond cs;
-    Duration subsecond;
-
-    // Note: The following fields exist for backward compatibility
-    // with older APIs.  Accessing these fields directly is a sign of
-    // imprudent logic in the calling code.  Modern time-related code
-    // should only access this data indirectly by way of FormatTime().
-    // These fields are undefined for InfiniteFuture() and InfinitePast().
-    int offset;             // seconds east of UTC
-    bool is_dst;            // is offset non-standard?
-    const char* zone_abbr;  // time-zone abbreviation (e.g., "PST")
-  };
-
-  // TimeZone::At(Time)
-  //
-  // Returns the civil time for this TimeZone at a certain `absl::Time`.
-  // If the input time is infinite, the output civil second will be set to
-  // CivilSecond::max() or min(), and the subsecond will be infinite.
-  //
-  // Example:
-  //
-  //   const auto epoch = lax.At(absl::UnixEpoch());
-  //   // epoch.cs == 1969-12-31 16:00:00
-  //   // epoch.subsecond == absl::ZeroDuration()
-  //   // epoch.offset == -28800
-  //   // epoch.is_dst == false
-  //   // epoch.abbr == "PST"
-  CivilInfo At(Time t) const;
-
-  // TimeZone::TimeInfo
-  //
-  // Information about the absolute times corresponding to a civil time.
-  // (Subseconds must be handled separately.)
-  //
-  // It is possible for a caller to pass a civil-time value that does
-  // not represent an actual or unique instant in time (due to a shift
-  // in UTC offset in the TimeZone, which results in a discontinuity in
-  // the civil-time components). For example, a daylight-saving-time
-  // transition skips or repeats civil times---in the United States,
-  // March 13, 2011 02:15 never occurred, while November 6, 2011 01:15
-  // occurred twice---so requests for such times are not well-defined.
-  // To account for these possibilities, `absl::TimeZone::TimeInfo` is
-  // richer than just a single `absl::Time`.
-  struct TimeInfo {
-    enum CivilKind {
-      UNIQUE,    // the civil time was singular (pre == trans == post)
-      SKIPPED,   // the civil time did not exist (pre >= trans > post)
-      REPEATED,  // the civil time was ambiguous (pre < trans <= post)
-    } kind;
-    Time pre;    // time calculated using the pre-transition offset
-    Time trans;  // when the civil-time discontinuity occurred
-    Time post;   // time calculated using the post-transition offset
-  };
-
-  // TimeZone::At(CivilSecond)
-  //
-  // Returns an `absl::TimeInfo` containing the absolute time(s) for this
-  // TimeZone at an `absl::CivilSecond`. When the civil time is skipped or
-  // repeated, returns times calculated using the pre-transition and post-
-  // transition UTC offsets, plus the transition time itself.
-  //
-  // Examples:
-  //
-  //   // A unique civil time
-  //   const auto jan01 = lax.At(absl::CivilSecond(2011, 1, 1, 0, 0, 0));
-  //   // jan01.kind == TimeZone::TimeInfo::UNIQUE
-  //   // jan01.pre    is 2011-01-01 00:00:00 -0800
-  //   // jan01.trans  is 2011-01-01 00:00:00 -0800
-  //   // jan01.post   is 2011-01-01 00:00:00 -0800
-  //
-  //   // A Spring DST transition, when there is a gap in civil time
-  //   const auto mar13 = lax.At(absl::CivilSecond(2011, 3, 13, 2, 15, 0));
-  //   // mar13.kind == TimeZone::TimeInfo::SKIPPED
-  //   // mar13.pre   is 2011-03-13 03:15:00 -0700
-  //   // mar13.trans is 2011-03-13 03:00:00 -0700
-  //   // mar13.post  is 2011-03-13 01:15:00 -0800
-  //
-  //   // A Fall DST transition, when civil times are repeated
-  //   const auto nov06 = lax.At(absl::CivilSecond(2011, 11, 6, 1, 15, 0));
-  //   // nov06.kind == TimeZone::TimeInfo::REPEATED
-  //   // nov06.pre   is 2011-11-06 01:15:00 -0700
-  //   // nov06.trans is 2011-11-06 01:00:00 -0800
-  //   // nov06.post  is 2011-11-06 01:15:00 -0800
-  TimeInfo At(CivilSecond ct) const;
-
-  // TimeZone::NextTransition()
-  // TimeZone::PrevTransition()
-  //
-  // Finds the time of the next/previous offset change in this time zone.
-  //
-  // By definition, `NextTransition(t, &trans)` returns false when `t` is
-  // `InfiniteFuture()`, and `PrevTransition(t, &trans)` returns false
-  // when `t` is `InfinitePast()`. If the zone has no transitions, the
-  // result will also be false no matter what the argument.
-  //
-  // Otherwise, when `t` is `InfinitePast()`, `NextTransition(t, &trans)`
-  // returns true and sets `trans` to the first recorded transition. Chains
-  // of calls to `NextTransition()/PrevTransition()` will eventually return
-  // false, but it is unspecified exactly when `NextTransition(t, &trans)`
-  // jumps to false, or what time is set by `PrevTransition(t, &trans)` for
-  // a very distant `t`.
-  //
-  // Note: Enumeration of time-zone transitions is for informational purposes
-  // only. Modern time-related code should not care about when offset changes
-  // occur.
-  //
-  // Example:
-  //   absl::TimeZone nyc;
-  //   if (!absl::LoadTimeZone("America/New_York", &nyc)) { ... }
-  //   const auto now = absl::Now();
-  //   auto t = absl::InfinitePast();
-  //   absl::TimeZone::CivilTransition trans;
-  //   while (t <= now && nyc.NextTransition(t, &trans)) {
-  //     // transition: trans.from -> trans.to
-  //     t = nyc.At(trans.to).trans;
-  //   }
-  struct CivilTransition {
-    CivilSecond from;  // the civil time we jump from
-    CivilSecond to;    // the civil time we jump to
-  };
-  bool NextTransition(Time t, CivilTransition* trans) const;
-  bool PrevTransition(Time t, CivilTransition* trans) const;
-
-  template <typename H>
-  friend H AbslHashValue(H h, TimeZone tz) {
-    return H::combine(std::move(h), tz.cz_);
-  }
-
- private:
-  friend bool operator==(TimeZone a, TimeZone b) { return a.cz_ == b.cz_; }
-  friend bool operator!=(TimeZone a, TimeZone b) { return a.cz_ != b.cz_; }
-  friend std::ostream& operator<<(std::ostream& os, TimeZone tz) {
-    return os << tz.name();
-  }
-
-  time_internal::cctz::time_zone cz_;
-};
-
-// LoadTimeZone()
-//
-// Loads the named zone. May perform I/O on the initial load of the named
-// zone. If the name is invalid, or some other kind of error occurs, returns
-// `false` and `*tz` is set to the UTC time zone.
-inline bool LoadTimeZone(absl::string_view name, TimeZone* tz) {
-  if (name == "localtime") {
-    *tz = TimeZone(time_internal::cctz::local_time_zone());
-    return true;
-  }
-  time_internal::cctz::time_zone cz;
-  const bool b = time_internal::cctz::load_time_zone(std::string(name), &cz);
-  *tz = TimeZone(cz);
-  return b;
-}
-
-// FixedTimeZone()
-//
-// Returns a TimeZone that is a fixed offset (seconds east) from UTC.
-// Note: If the absolute value of the offset is greater than 24 hours
-// you'll get UTC (i.e., no offset) instead.
-inline TimeZone FixedTimeZone(int seconds) {
-  return TimeZone(
-      time_internal::cctz::fixed_time_zone(std::chrono::seconds(seconds)));
-}
-
-// UTCTimeZone()
-//
-// Convenience method returning the UTC time zone.
-inline TimeZone UTCTimeZone() {
-  return TimeZone(time_internal::cctz::utc_time_zone());
-}
-
-// LocalTimeZone()
-//
-// Convenience method returning the local time zone, or UTC if there is
-// no configured local zone.  Warning: Be wary of using LocalTimeZone(),
-// and particularly so in a server process, as the zone configured for the
-// local machine should be irrelevant.  Prefer an explicit zone name.
-inline TimeZone LocalTimeZone() {
-  return TimeZone(time_internal::cctz::local_time_zone());
-}
-
-// ToCivilSecond()
-// ToCivilMinute()
-// ToCivilHour()
-// ToCivilDay()
-// ToCivilMonth()
-// ToCivilYear()
-//
-// Helpers for TimeZone::At(Time) to return particularly aligned civil times.
-//
-// Example:
-//
-//   absl::Time t = ...;
-//   absl::TimeZone tz = ...;
-//   const auto cd = absl::ToCivilDay(t, tz);
-inline CivilSecond ToCivilSecond(Time t, TimeZone tz) {
-  return tz.At(t).cs;  // already a CivilSecond
-}
-inline CivilMinute ToCivilMinute(Time t, TimeZone tz) {
-  return CivilMinute(tz.At(t).cs);
-}
-inline CivilHour ToCivilHour(Time t, TimeZone tz) {
-  return CivilHour(tz.At(t).cs);
-}
-inline CivilDay ToCivilDay(Time t, TimeZone tz) {
-  return CivilDay(tz.At(t).cs);
-}
-inline CivilMonth ToCivilMonth(Time t, TimeZone tz) {
-  return CivilMonth(tz.At(t).cs);
-}
-inline CivilYear ToCivilYear(Time t, TimeZone tz) {
-  return CivilYear(tz.At(t).cs);
-}
-
-// FromCivil()
-//
-// Helper for TimeZone::At(CivilSecond) that provides "order-preserving
-// semantics." If the civil time maps to a unique time, that time is
-// returned. If the civil time is repeated in the given time zone, the
-// time using the pre-transition offset is returned. Otherwise, the
-// civil time is skipped in the given time zone, and the transition time
-// is returned. This means that for any two civil times, ct1 and ct2,
-// (ct1 < ct2) => (FromCivil(ct1) <= FromCivil(ct2)), the equal case
-// being when two non-existent civil times map to the same transition time.
-//
-// Note: Accepts civil times of any alignment.
-inline Time FromCivil(CivilSecond ct, TimeZone tz) {
-  const auto ti = tz.At(ct);
-  if (ti.kind == TimeZone::TimeInfo::SKIPPED) return ti.trans;
-  return ti.pre;
-}
-
-// TimeConversion
-//
-// An `absl::TimeConversion` represents the conversion of year, month, day,
-// hour, minute, and second values (i.e., a civil time), in a particular
-// `absl::TimeZone`, to a time instant (an absolute time), as returned by
-// `absl::ConvertDateTime()`. Legacy version of `absl::TimeZone::TimeInfo`.
-//
-// Deprecated. Use `absl::TimeZone::TimeInfo`.
-struct
-    TimeConversion {
-  Time pre;    // time calculated using the pre-transition offset
-  Time trans;  // when the civil-time discontinuity occurred
-  Time post;   // time calculated using the post-transition offset
-
-  enum Kind {
-    UNIQUE,    // the civil time was singular (pre == trans == post)
-    SKIPPED,   // the civil time did not exist
-    REPEATED,  // the civil time was ambiguous
-  };
-  Kind kind;
-
-  bool normalized;  // input values were outside their valid ranges
-};
-
-// ConvertDateTime()
-//
-// Legacy version of `absl::TimeZone::At(absl::CivilSecond)` that takes
-// the civil time as six, separate values (YMDHMS).
-//
-// The input month, day, hour, minute, and second values can be outside
-// of their valid ranges, in which case they will be "normalized" during
-// the conversion.
-//
-// Example:
-//
-//   // "October 32" normalizes to "November 1".
-//   absl::TimeConversion tc =
-//       absl::ConvertDateTime(2013, 10, 32, 8, 30, 0, lax);
-//   // tc.kind == TimeConversion::UNIQUE && tc.normalized == true
-//   // absl::ToCivilDay(tc.pre, tz).month() == 11
-//   // absl::ToCivilDay(tc.pre, tz).day() == 1
-//
-// Deprecated. Use `absl::TimeZone::At(CivilSecond)`.
-TimeConversion ConvertDateTime(int64_t year, int mon, int day, int hour,
-                               int min, int sec, TimeZone tz);
-
-// FromDateTime()
-//
-// A convenience wrapper for `absl::ConvertDateTime()` that simply returns
-// the "pre" `absl::Time`.  That is, the unique result, or the instant that
-// is correct using the pre-transition offset (as if the transition never
-// happened).
-//
-// Example:
-//
-//   absl::Time t = absl::FromDateTime(2017, 9, 26, 9, 30, 0, lax);
-//   // t = 2017-09-26 09:30:00 -0700
-//
-// Deprecated. Use `absl::FromCivil(CivilSecond, TimeZone)`. Note that the
-// behavior of `FromCivil()` differs from `FromDateTime()` for skipped civil
-// times. If you care about that see `absl::TimeZone::At(absl::CivilSecond)`.
-inline Time FromDateTime(int64_t year, int mon, int day, int hour,
-                         int min, int sec, TimeZone tz) {
-  return ConvertDateTime(year, mon, day, hour, min, sec, tz).pre;
-}
-
-// FromTM()
-//
-// Converts the `tm_year`, `tm_mon`, `tm_mday`, `tm_hour`, `tm_min`, and
-// `tm_sec` fields to an `absl::Time` using the given time zone. See ctime(3)
-// for a description of the expected values of the tm fields. If the indicated
-// time instant is not unique (see `absl::TimeZone::At(absl::CivilSecond)`
-// above), the `tm_isdst` field is consulted to select the desired instant
-// (`tm_isdst` > 0 means DST, `tm_isdst` == 0 means no DST, `tm_isdst` < 0
-// means use the post-transition offset).
-Time FromTM(const struct tm& tm, TimeZone tz);
-
-// ToTM()
-//
-// Converts the given `absl::Time` to a struct tm using the given time zone.
-// See ctime(3) for a description of the values of the tm fields.
-struct tm ToTM(Time t, TimeZone tz);
-
-// RFC3339_full
-// RFC3339_sec
-//
-// FormatTime()/ParseTime() format specifiers for RFC3339 date/time strings,
-// with trailing zeros trimmed or with fractional seconds omitted altogether.
-//
-// Note that RFC3339_sec[] matches an ISO 8601 extended format for date and
-// time with UTC offset.  Also note the use of "%Y": RFC3339 mandates that
-// years have exactly four digits, but we allow them to take their natural
-// width.
-ABSL_DLL extern const char RFC3339_full[];  // %Y-%m-%d%ET%H:%M:%E*S%Ez
-ABSL_DLL extern const char RFC3339_sec[];   // %Y-%m-%d%ET%H:%M:%S%Ez
-
-// RFC1123_full
-// RFC1123_no_wday
-//
-// FormatTime()/ParseTime() format specifiers for RFC1123 date/time strings.
-ABSL_DLL extern const char RFC1123_full[];     // %a, %d %b %E4Y %H:%M:%S %z
-ABSL_DLL extern const char RFC1123_no_wday[];  // %d %b %E4Y %H:%M:%S %z
-
-// FormatTime()
-//
-// Formats the given `absl::Time` in the `absl::TimeZone` according to the
-// provided format string. Uses strftime()-like formatting options, with
-// the following extensions:
-//
-//   - %Ez  - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm)
-//   - %E*z - Full-resolution numeric UTC offset (+hh:mm:ss or -hh:mm:ss)
-//   - %E#S - Seconds with # digits of fractional precision
-//   - %E*S - Seconds with full fractional precision (a literal '*')
-//   - %E#f - Fractional seconds with # digits of precision
-//   - %E*f - Fractional seconds with full precision (a literal '*')
-//   - %E4Y - Four-character years (-999 ... -001, 0000, 0001 ... 9999)
-//   - %ET  - The RFC3339 "date-time" separator "T"
-//
-// Note that %E0S behaves like %S, and %E0f produces no characters.  In
-// contrast %E*f always produces at least one digit, which may be '0'.
-//
-// Note that %Y produces as many characters as it takes to fully render the
-// year.  A year outside of [-999:9999] when formatted with %E4Y will produce
-// more than four characters, just like %Y.
-//
-// We recommend that format strings include the UTC offset (%z, %Ez, or %E*z)
-// so that the result uniquely identifies a time instant.
-//
-// Example:
-//
-//   absl::CivilSecond cs(2013, 1, 2, 3, 4, 5);
-//   absl::Time t = absl::FromCivil(cs, lax);
-//   std::string f = absl::FormatTime("%H:%M:%S", t, lax);  // "03:04:05"
-//   f = absl::FormatTime("%H:%M:%E3S", t, lax);  // "03:04:05.000"
-//
-// Note: If the given `absl::Time` is `absl::InfiniteFuture()`, the returned
-// string will be exactly "infinite-future". If the given `absl::Time` is
-// `absl::InfinitePast()`, the returned string will be exactly "infinite-past".
-// In both cases the given format string and `absl::TimeZone` are ignored.
-//
-std::string FormatTime(absl::string_view format, Time t, TimeZone tz);
-
-// Convenience functions that format the given time using the RFC3339_full
-// format.  The first overload uses the provided TimeZone, while the second
-// uses LocalTimeZone().
-std::string FormatTime(Time t, TimeZone tz);
-std::string FormatTime(Time t);
-
-// Output stream operator.
-inline std::ostream& operator<<(std::ostream& os, Time t) {
-  return os << FormatTime(t);
-}
-
-// ParseTime()
-//
-// Parses an input string according to the provided format string and
-// returns the corresponding `absl::Time`. Uses strftime()-like formatting
-// options, with the same extensions as FormatTime(), but with the
-// exceptions that %E#S is interpreted as %E*S, and %E#f as %E*f.  %Ez
-// and %E*z also accept the same inputs, which (along with %z) includes
-// 'z' and 'Z' as synonyms for +00:00.  %ET accepts either 'T' or 't'.
-//
-// %Y consumes as many numeric characters as it can, so the matching data
-// should always be terminated with a non-numeric.  %E4Y always consumes
-// exactly four characters, including any sign.
-//
-// Unspecified fields are taken from the default date and time of ...
-//
-//   "1970-01-01 00:00:00.0 +0000"
-//
-// For example, parsing a string of "15:45" (%H:%M) will return an absl::Time
-// that represents "1970-01-01 15:45:00.0 +0000".
-//
-// Note that since ParseTime() returns time instants, it makes the most sense
-// to parse fully-specified date/time strings that include a UTC offset (%z,
-// %Ez, or %E*z).
-//
-// Note also that `absl::ParseTime()` only heeds the fields year, month, day,
-// hour, minute, (fractional) second, and UTC offset.  Other fields, like
-// weekday (%a or %A), while parsed for syntactic validity, are ignored
-// in the conversion.
-//
-// Date and time fields that are out-of-range will be treated as errors
-// rather than normalizing them like `absl::CivilSecond` does.  For example,
-// it is an error to parse the date "Oct 32, 2013" because 32 is out of range.
-//
-// A leap second of ":60" is normalized to ":00" of the following minute
-// with fractional seconds discarded.  The following table shows how the
-// given seconds and subseconds will be parsed:
-//
-//   "59.x" -> 59.x  // exact
-//   "60.x" -> 00.0  // normalized
-//   "00.x" -> 00.x  // exact
-//
-// Errors are indicated by returning false and assigning an error message
-// to the "err" out param if it is non-null.
-//
-// Note: If the input string is exactly "infinite-future", the returned
-// `absl::Time` will be `absl::InfiniteFuture()` and `true` will be returned.
-// If the input string is "infinite-past", the returned `absl::Time` will be
-// `absl::InfinitePast()` and `true` will be returned.
-//
-bool ParseTime(absl::string_view format, absl::string_view input, Time* time,
-               std::string* err);
-
-// Like ParseTime() above, but if the format string does not contain a UTC
-// offset specification (%z/%Ez/%E*z) then the input is interpreted in the
-// given TimeZone.  This means that the input, by itself, does not identify a
-// unique instant.  Being time-zone dependent, it also admits the possibility
-// of ambiguity or non-existence, in which case the "pre" time (as defined
-// by TimeZone::TimeInfo) is returned.  For these reasons we recommend that
-// all date/time strings include a UTC offset so they're context independent.
-bool ParseTime(absl::string_view format, absl::string_view input, TimeZone tz,
-               Time* time, std::string* err);
-
-// ============================================================================
-// Implementation Details Follow
-// ============================================================================
-
-namespace time_internal {
-
-// Creates a Duration with a given representation.
-// REQUIRES: hi,lo is a valid representation of a Duration as specified
-// in time/duration.cc.
-constexpr Duration MakeDuration(int64_t hi, uint32_t lo = 0) {
-  return Duration(hi, lo);
-}
-
-constexpr Duration MakeDuration(int64_t hi, int64_t lo) {
-  return MakeDuration(hi, static_cast<uint32_t>(lo));
-}
-
-// Make a Duration value from a floating-point number, as long as that number
-// is in the range [ 0 .. numeric_limits<int64_t>::max ), that is, as long as
-// it's positive and can be converted to int64_t without risk of UB.
-inline Duration MakePosDoubleDuration(double n) {
-  const int64_t int_secs = static_cast<int64_t>(n);
-  const uint32_t ticks = static_cast<uint32_t>(
-      (n - static_cast<double>(int_secs)) * kTicksPerSecond + 0.5);
-  return ticks < kTicksPerSecond
-             ? MakeDuration(int_secs, ticks)
-             : MakeDuration(int_secs + 1, ticks - kTicksPerSecond);
-}
-
-// Creates a normalized Duration from an almost-normalized (sec,ticks)
-// pair. sec may be positive or negative.  ticks must be in the range
-// -kTicksPerSecond < *ticks < kTicksPerSecond.  If ticks is negative it
-// will be normalized to a positive value in the resulting Duration.
-constexpr Duration MakeNormalizedDuration(int64_t sec, int64_t ticks) {
-  return (ticks < 0) ? MakeDuration(sec - 1, ticks + kTicksPerSecond)
-                     : MakeDuration(sec, ticks);
-}
-
-// Provide access to the Duration representation.
-constexpr int64_t GetRepHi(Duration d) { return d.rep_hi_; }
-constexpr uint32_t GetRepLo(Duration d) { return d.rep_lo_; }
-
-// Returns true iff d is positive or negative infinity.
-constexpr bool IsInfiniteDuration(Duration d) { return GetRepLo(d) == ~0U; }
-
-// Returns an infinite Duration with the opposite sign.
-// REQUIRES: IsInfiniteDuration(d)
-constexpr Duration OppositeInfinity(Duration d) {
-  return GetRepHi(d) < 0
-             ? MakeDuration((std::numeric_limits<int64_t>::max)(), ~0U)
-             : MakeDuration((std::numeric_limits<int64_t>::min)(), ~0U);
-}
-
-// Returns (-n)-1 (equivalently -(n+1)) without avoidable overflow.
-constexpr int64_t NegateAndSubtractOne(int64_t n) {
-  // Note: Good compilers will optimize this expression to ~n when using
-  // a two's-complement representation (which is required for int64_t).
-  return (n < 0) ? -(n + 1) : (-n) - 1;
-}
-
-// Map between a Time and a Duration since the Unix epoch.  Note that these
-// functions depend on the above mentioned choice of the Unix epoch for the
-// Time representation (and both need to be Time friends).  Without this
-// knowledge, we would need to add-in/subtract-out UnixEpoch() respectively.
-constexpr Time FromUnixDuration(Duration d) { return Time(d); }
-constexpr Duration ToUnixDuration(Time t) { return t.rep_; }
-
-template <std::intmax_t N>
-constexpr Duration FromInt64(int64_t v, std::ratio<1, N>) {
-  static_assert(0 < N && N <= 1000 * 1000 * 1000, "Unsupported ratio");
-  // Subsecond ratios cannot overflow.
-  return MakeNormalizedDuration(
-      v / N, v % N * kTicksPerNanosecond * 1000 * 1000 * 1000 / N);
-}
-constexpr Duration FromInt64(int64_t v, std::ratio<60>) {
-  return (v <= (std::numeric_limits<int64_t>::max)() / 60 &&
-          v >= (std::numeric_limits<int64_t>::min)() / 60)
-             ? MakeDuration(v * 60)
-             : v > 0 ? InfiniteDuration() : -InfiniteDuration();
-}
-constexpr Duration FromInt64(int64_t v, std::ratio<3600>) {
-  return (v <= (std::numeric_limits<int64_t>::max)() / 3600 &&
-          v >= (std::numeric_limits<int64_t>::min)() / 3600)
-             ? MakeDuration(v * 3600)
-             : v > 0 ? InfiniteDuration() : -InfiniteDuration();
-}
-
-// IsValidRep64<T>(0) is true if the expression `int64_t{std::declval<T>()}` is
-// valid. That is, if a T can be assigned to an int64_t without narrowing.
-template <typename T>
-constexpr auto IsValidRep64(int) -> decltype(int64_t{std::declval<T>()} == 0) {
-  return true;
-}
-template <typename T>
-constexpr auto IsValidRep64(char) -> bool {
-  return false;
-}
-
-// Converts a std::chrono::duration to an absl::Duration.
-template <typename Rep, typename Period>
-constexpr Duration FromChrono(const std::chrono::duration<Rep, Period>& d) {
-  static_assert(IsValidRep64<Rep>(0), "duration::rep is invalid");
-  return FromInt64(int64_t{d.count()}, Period{});
-}
-
-template <typename Ratio>
-int64_t ToInt64(Duration d, Ratio) {
-  // Note: This may be used on MSVC, which may have a system_clock period of
-  // std::ratio<1, 10 * 1000 * 1000>
-  return ToInt64Seconds(d * Ratio::den / Ratio::num);
-}
-// Fastpath implementations for the 6 common duration units.
-inline int64_t ToInt64(Duration d, std::nano) {
-  return ToInt64Nanoseconds(d);
-}
-inline int64_t ToInt64(Duration d, std::micro) {
-  return ToInt64Microseconds(d);
-}
-inline int64_t ToInt64(Duration d, std::milli) {
-  return ToInt64Milliseconds(d);
-}
-inline int64_t ToInt64(Duration d, std::ratio<1>) {
-  return ToInt64Seconds(d);
-}
-inline int64_t ToInt64(Duration d, std::ratio<60>) {
-  return ToInt64Minutes(d);
-}
-inline int64_t ToInt64(Duration d, std::ratio<3600>) {
-  return ToInt64Hours(d);
-}
-
-// Converts an absl::Duration to a chrono duration of type T.
-template <typename T>
-T ToChronoDuration(Duration d) {
-  using Rep = typename T::rep;
-  using Period = typename T::period;
-  static_assert(IsValidRep64<Rep>(0), "duration::rep is invalid");
-  if (time_internal::IsInfiniteDuration(d))
-    return d < ZeroDuration() ? (T::min)() : (T::max)();
-  const auto v = ToInt64(d, Period{});
-  if (v > (std::numeric_limits<Rep>::max)()) return (T::max)();
-  if (v < (std::numeric_limits<Rep>::min)()) return (T::min)();
-  return T{v};
-}
-
-}  // namespace time_internal
-
-constexpr Duration Nanoseconds(int64_t n) {
-  return time_internal::FromInt64(n, std::nano{});
-}
-constexpr Duration Microseconds(int64_t n) {
-  return time_internal::FromInt64(n, std::micro{});
-}
-constexpr Duration Milliseconds(int64_t n) {
-  return time_internal::FromInt64(n, std::milli{});
-}
-constexpr Duration Seconds(int64_t n) {
-  return time_internal::FromInt64(n, std::ratio<1>{});
-}
-constexpr Duration Minutes(int64_t n) {
-  return time_internal::FromInt64(n, std::ratio<60>{});
-}
-constexpr Duration Hours(int64_t n) {
-  return time_internal::FromInt64(n, std::ratio<3600>{});
-}
-
-constexpr bool operator<(Duration lhs, Duration rhs) {
-  return time_internal::GetRepHi(lhs) != time_internal::GetRepHi(rhs)
-             ? time_internal::GetRepHi(lhs) < time_internal::GetRepHi(rhs)
-         : time_internal::GetRepHi(lhs) == (std::numeric_limits<int64_t>::min)()
-             ? time_internal::GetRepLo(lhs) + 1 <
-                   time_internal::GetRepLo(rhs) + 1
-             : time_internal::GetRepLo(lhs) < time_internal::GetRepLo(rhs);
-}
-
-constexpr bool operator==(Duration lhs, Duration rhs) {
-  return time_internal::GetRepHi(lhs) == time_internal::GetRepHi(rhs) &&
-         time_internal::GetRepLo(lhs) == time_internal::GetRepLo(rhs);
-}
-
-constexpr Duration operator-(Duration d) {
-  // This is a little interesting because of the special cases.
-  //
-  // If rep_lo_ is zero, we have it easy; it's safe to negate rep_hi_, we're
-  // dealing with an integral number of seconds, and the only special case is
-  // the maximum negative finite duration, which can't be negated.
-  //
-  // Infinities stay infinite, and just change direction.
-  //
-  // Finally we're in the case where rep_lo_ is non-zero, and we can borrow
-  // a second's worth of ticks and avoid overflow (as negating int64_t-min + 1
-  // is safe).
-  return time_internal::GetRepLo(d) == 0
-             ? time_internal::GetRepHi(d) ==
-                       (std::numeric_limits<int64_t>::min)()
-                   ? InfiniteDuration()
-                   : time_internal::MakeDuration(-time_internal::GetRepHi(d))
-             : time_internal::IsInfiniteDuration(d)
-                   ? time_internal::OppositeInfinity(d)
-                   : time_internal::MakeDuration(
-                         time_internal::NegateAndSubtractOne(
-                             time_internal::GetRepHi(d)),
-                         time_internal::kTicksPerSecond -
-                             time_internal::GetRepLo(d));
-}
-
-constexpr Duration InfiniteDuration() {
-  return time_internal::MakeDuration((std::numeric_limits<int64_t>::max)(),
-                                     ~0U);
-}
-
-constexpr Duration FromChrono(const std::chrono::nanoseconds& d) {
-  return time_internal::FromChrono(d);
-}
-constexpr Duration FromChrono(const std::chrono::microseconds& d) {
-  return time_internal::FromChrono(d);
-}
-constexpr Duration FromChrono(const std::chrono::milliseconds& d) {
-  return time_internal::FromChrono(d);
-}
-constexpr Duration FromChrono(const std::chrono::seconds& d) {
-  return time_internal::FromChrono(d);
-}
-constexpr Duration FromChrono(const std::chrono::minutes& d) {
-  return time_internal::FromChrono(d);
-}
-constexpr Duration FromChrono(const std::chrono::hours& d) {
-  return time_internal::FromChrono(d);
-}
-
-constexpr Time FromUnixNanos(int64_t ns) {
-  return time_internal::FromUnixDuration(Nanoseconds(ns));
-}
-
-constexpr Time FromUnixMicros(int64_t us) {
-  return time_internal::FromUnixDuration(Microseconds(us));
-}
-
-constexpr Time FromUnixMillis(int64_t ms) {
-  return time_internal::FromUnixDuration(Milliseconds(ms));
-}
-
-constexpr Time FromUnixSeconds(int64_t s) {
-  return time_internal::FromUnixDuration(Seconds(s));
-}
-
-constexpr Time FromTimeT(time_t t) {
-  return time_internal::FromUnixDuration(Seconds(t));
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TIME_TIME_H_
diff --git a/third_party/abseil/absl/time/time_benchmark.cc b/third_party/abseil/absl/time/time_benchmark.cc
deleted file mode 100644
index 99e6279..0000000
--- a/third_party/abseil/absl/time/time_benchmark.cc
+++ /dev/null
@@ -1,316 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/time.h"
-
-#if !defined(_WIN32)
-#include <sys/time.h>
-#endif  // _WIN32
-#include <algorithm>
-#include <cmath>
-#include <cstddef>
-#include <cstring>
-#include <ctime>
-#include <memory>
-#include <string>
-
-#include "absl/time/clock.h"
-#include "absl/time/internal/test_util.h"
-#include "benchmark/benchmark.h"
-
-namespace {
-
-//
-// Addition/Subtraction of a duration
-//
-
-void BM_Time_Arithmetic(benchmark::State& state) {
-  const absl::Duration nano = absl::Nanoseconds(1);
-  const absl::Duration sec = absl::Seconds(1);
-  absl::Time t = absl::UnixEpoch();
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(t += nano);
-    benchmark::DoNotOptimize(t -= sec);
-  }
-}
-BENCHMARK(BM_Time_Arithmetic);
-
-//
-// Time difference
-//
-
-void BM_Time_Difference(benchmark::State& state) {
-  absl::Time start = absl::Now();
-  absl::Time end = start + absl::Nanoseconds(1);
-  absl::Duration diff;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(diff += end - start);
-  }
-}
-BENCHMARK(BM_Time_Difference);
-
-//
-// ToDateTime
-//
-// In each "ToDateTime" benchmark we switch between two instants
-// separated by at least one transition in order to defeat any
-// internal caching of previous results (e.g., see local_time_hint_).
-//
-// The "UTC" variants use UTC instead of the Google/local time zone.
-//
-
-void BM_Time_ToDateTime_Absl(benchmark::State& state) {
-  const absl::TimeZone tz =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  absl::Time t = absl::FromUnixSeconds(1384569027);
-  absl::Time t2 = absl::FromUnixSeconds(1418962578);
-  while (state.KeepRunning()) {
-    std::swap(t, t2);
-    t += absl::Seconds(1);
-    benchmark::DoNotOptimize(t.In(tz));
-  }
-}
-BENCHMARK(BM_Time_ToDateTime_Absl);
-
-void BM_Time_ToDateTime_Libc(benchmark::State& state) {
-  // No timezone support, so just use localtime.
-  time_t t = 1384569027;
-  time_t t2 = 1418962578;
-  while (state.KeepRunning()) {
-    std::swap(t, t2);
-    t += 1;
-    struct tm tm;
-#if !defined(_WIN32)
-    benchmark::DoNotOptimize(localtime_r(&t, &tm));
-#else   // _WIN32
-    benchmark::DoNotOptimize(localtime_s(&tm, &t));
-#endif  // _WIN32
-  }
-}
-BENCHMARK(BM_Time_ToDateTime_Libc);
-
-void BM_Time_ToDateTimeUTC_Absl(benchmark::State& state) {
-  const absl::TimeZone tz = absl::UTCTimeZone();
-  absl::Time t = absl::FromUnixSeconds(1384569027);
-  while (state.KeepRunning()) {
-    t += absl::Seconds(1);
-    benchmark::DoNotOptimize(t.In(tz));
-  }
-}
-BENCHMARK(BM_Time_ToDateTimeUTC_Absl);
-
-void BM_Time_ToDateTimeUTC_Libc(benchmark::State& state) {
-  time_t t = 1384569027;
-  while (state.KeepRunning()) {
-    t += 1;
-    struct tm tm;
-#if !defined(_WIN32)
-    benchmark::DoNotOptimize(gmtime_r(&t, &tm));
-#else   // _WIN32
-    benchmark::DoNotOptimize(gmtime_s(&tm, &t));
-#endif  // _WIN32
-  }
-}
-BENCHMARK(BM_Time_ToDateTimeUTC_Libc);
-
-//
-// FromUnixMicros
-//
-
-void BM_Time_FromUnixMicros(benchmark::State& state) {
-  int i = 0;
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::FromUnixMicros(i));
-    ++i;
-  }
-}
-BENCHMARK(BM_Time_FromUnixMicros);
-
-void BM_Time_ToUnixNanos(benchmark::State& state) {
-  const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(ToUnixNanos(t));
-  }
-}
-BENCHMARK(BM_Time_ToUnixNanos);
-
-void BM_Time_ToUnixMicros(benchmark::State& state) {
-  const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(ToUnixMicros(t));
-  }
-}
-BENCHMARK(BM_Time_ToUnixMicros);
-
-void BM_Time_ToUnixMillis(benchmark::State& state) {
-  const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(ToUnixMillis(t));
-  }
-}
-BENCHMARK(BM_Time_ToUnixMillis);
-
-void BM_Time_ToUnixSeconds(benchmark::State& state) {
-  const absl::Time t = absl::UnixEpoch() + absl::Seconds(123);
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToUnixSeconds(t));
-  }
-}
-BENCHMARK(BM_Time_ToUnixSeconds);
-
-//
-// FromCivil
-//
-// In each "FromCivil" benchmark we switch between two YMDhms values
-// separated by at least one transition in order to defeat any internal
-// caching of previous results (e.g., see time_local_hint_).
-//
-// The "UTC" variants use UTC instead of the Google/local time zone.
-// The "Day0" variants require normalization of the day of month.
-//
-
-void BM_Time_FromCivil_Absl(benchmark::State& state) {
-  const absl::TimeZone tz =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  int i = 0;
-  while (state.KeepRunning()) {
-    if ((i & 1) == 0) {
-      absl::FromCivil(absl::CivilSecond(2014, 12, 18, 20, 16, 18), tz);
-    } else {
-      absl::FromCivil(absl::CivilSecond(2013, 11, 15, 18, 30, 27), tz);
-    }
-    ++i;
-  }
-}
-BENCHMARK(BM_Time_FromCivil_Absl);
-
-void BM_Time_FromCivil_Libc(benchmark::State& state) {
-  // No timezone support, so just use localtime.
-  int i = 0;
-  while (state.KeepRunning()) {
-    struct tm tm;
-    if ((i & 1) == 0) {
-      tm.tm_year = 2014 - 1900;
-      tm.tm_mon = 12 - 1;
-      tm.tm_mday = 18;
-      tm.tm_hour = 20;
-      tm.tm_min = 16;
-      tm.tm_sec = 18;
-    } else {
-      tm.tm_year = 2013 - 1900;
-      tm.tm_mon = 11 - 1;
-      tm.tm_mday = 15;
-      tm.tm_hour = 18;
-      tm.tm_min = 30;
-      tm.tm_sec = 27;
-    }
-    tm.tm_isdst = -1;
-    mktime(&tm);
-    ++i;
-  }
-}
-BENCHMARK(BM_Time_FromCivil_Libc);
-
-void BM_Time_FromCivilUTC_Absl(benchmark::State& state) {
-  const absl::TimeZone tz = absl::UTCTimeZone();
-  while (state.KeepRunning()) {
-    absl::FromCivil(absl::CivilSecond(2014, 12, 18, 20, 16, 18), tz);
-  }
-}
-BENCHMARK(BM_Time_FromCivilUTC_Absl);
-
-void BM_Time_FromCivilDay0_Absl(benchmark::State& state) {
-  const absl::TimeZone tz =
-      absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  int i = 0;
-  while (state.KeepRunning()) {
-    if ((i & 1) == 0) {
-      absl::FromCivil(absl::CivilSecond(2014, 12, 0, 20, 16, 18), tz);
-    } else {
-      absl::FromCivil(absl::CivilSecond(2013, 11, 0, 18, 30, 27), tz);
-    }
-    ++i;
-  }
-}
-BENCHMARK(BM_Time_FromCivilDay0_Absl);
-
-void BM_Time_FromCivilDay0_Libc(benchmark::State& state) {
-  // No timezone support, so just use localtime.
-  int i = 0;
-  while (state.KeepRunning()) {
-    struct tm tm;
-    if ((i & 1) == 0) {
-      tm.tm_year = 2014 - 1900;
-      tm.tm_mon = 12 - 1;
-      tm.tm_mday = 0;
-      tm.tm_hour = 20;
-      tm.tm_min = 16;
-      tm.tm_sec = 18;
-    } else {
-      tm.tm_year = 2013 - 1900;
-      tm.tm_mon = 11 - 1;
-      tm.tm_mday = 0;
-      tm.tm_hour = 18;
-      tm.tm_min = 30;
-      tm.tm_sec = 27;
-    }
-    tm.tm_isdst = -1;
-    mktime(&tm);
-    ++i;
-  }
-}
-BENCHMARK(BM_Time_FromCivilDay0_Libc);
-
-//
-// To/FromTimespec
-//
-
-void BM_Time_ToTimespec(benchmark::State& state) {
-  absl::Time now = absl::Now();
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::ToTimespec(now));
-  }
-}
-BENCHMARK(BM_Time_ToTimespec);
-
-void BM_Time_FromTimespec(benchmark::State& state) {
-  timespec ts = absl::ToTimespec(absl::Now());
-  while (state.KeepRunning()) {
-    if (++ts.tv_nsec == 1000 * 1000 * 1000) {
-      ++ts.tv_sec;
-      ts.tv_nsec = 0;
-    }
-    benchmark::DoNotOptimize(absl::TimeFromTimespec(ts));
-  }
-}
-BENCHMARK(BM_Time_FromTimespec);
-
-//
-// Comparison with InfiniteFuture/Past
-//
-
-void BM_Time_InfiniteFuture(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::InfiniteFuture());
-  }
-}
-BENCHMARK(BM_Time_InfiniteFuture);
-
-void BM_Time_InfinitePast(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(absl::InfinitePast());
-  }
-}
-BENCHMARK(BM_Time_InfinitePast);
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/time_test.cc b/third_party/abseil/absl/time/time_test.cc
deleted file mode 100644
index cde9423..0000000
--- a/third_party/abseil/absl/time/time_test.cc
+++ /dev/null
@@ -1,1280 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/time.h"
-
-#if defined(_MSC_VER)
-#include <winsock2.h>  // for timeval
-#endif
-
-#include <chrono>  // NOLINT(build/c++11)
-#include <cstring>
-#include <ctime>
-#include <iomanip>
-#include <limits>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/numeric/int128.h"
-#include "absl/time/clock.h"
-#include "absl/time/internal/test_util.h"
-
-namespace {
-
-#if defined(GTEST_USES_SIMPLE_RE) && GTEST_USES_SIMPLE_RE
-const char kZoneAbbrRE[] = ".*";  // just punt
-#else
-const char kZoneAbbrRE[] = "[A-Za-z]{3,4}|[-+][0-9]{2}([0-9]{2})?";
-#endif
-
-// This helper is a macro so that failed expectations show up with the
-// correct line numbers.
-#define EXPECT_CIVIL_INFO(ci, y, m, d, h, min, s, off, isdst)      \
-  do {                                                             \
-    EXPECT_EQ(y, ci.cs.year());                                    \
-    EXPECT_EQ(m, ci.cs.month());                                   \
-    EXPECT_EQ(d, ci.cs.day());                                     \
-    EXPECT_EQ(h, ci.cs.hour());                                    \
-    EXPECT_EQ(min, ci.cs.minute());                                \
-    EXPECT_EQ(s, ci.cs.second());                                  \
-    EXPECT_EQ(off, ci.offset);                                     \
-    EXPECT_EQ(isdst, ci.is_dst);                                   \
-    EXPECT_THAT(ci.zone_abbr, testing::MatchesRegex(kZoneAbbrRE)); \
-  } while (0)
-
-// A gMock matcher to match timespec values. Use this matcher like:
-// timespec ts1, ts2;
-// EXPECT_THAT(ts1, TimespecMatcher(ts2));
-MATCHER_P(TimespecMatcher, ts, "") {
-  if (ts.tv_sec == arg.tv_sec && ts.tv_nsec == arg.tv_nsec) return true;
-  *result_listener << "expected: {" << ts.tv_sec << ", " << ts.tv_nsec << "} ";
-  *result_listener << "actual: {" << arg.tv_sec << ", " << arg.tv_nsec << "}";
-  return false;
-}
-
-// A gMock matcher to match timeval values. Use this matcher like:
-// timeval tv1, tv2;
-// EXPECT_THAT(tv1, TimevalMatcher(tv2));
-MATCHER_P(TimevalMatcher, tv, "") {
-  if (tv.tv_sec == arg.tv_sec && tv.tv_usec == arg.tv_usec) return true;
-  *result_listener << "expected: {" << tv.tv_sec << ", " << tv.tv_usec << "} ";
-  *result_listener << "actual: {" << arg.tv_sec << ", " << arg.tv_usec << "}";
-  return false;
-}
-
-TEST(Time, ConstExpr) {
-  constexpr absl::Time t0 = absl::UnixEpoch();
-  static_assert(t0 == absl::Time(), "UnixEpoch");
-  constexpr absl::Time t1 = absl::InfiniteFuture();
-  static_assert(t1 != absl::Time(), "InfiniteFuture");
-  constexpr absl::Time t2 = absl::InfinitePast();
-  static_assert(t2 != absl::Time(), "InfinitePast");
-  constexpr absl::Time t3 = absl::FromUnixNanos(0);
-  static_assert(t3 == absl::Time(), "FromUnixNanos");
-  constexpr absl::Time t4 = absl::FromUnixMicros(0);
-  static_assert(t4 == absl::Time(), "FromUnixMicros");
-  constexpr absl::Time t5 = absl::FromUnixMillis(0);
-  static_assert(t5 == absl::Time(), "FromUnixMillis");
-  constexpr absl::Time t6 = absl::FromUnixSeconds(0);
-  static_assert(t6 == absl::Time(), "FromUnixSeconds");
-  constexpr absl::Time t7 = absl::FromTimeT(0);
-  static_assert(t7 == absl::Time(), "FromTimeT");
-}
-
-TEST(Time, ValueSemantics) {
-  absl::Time a;      // Default construction
-  absl::Time b = a;  // Copy construction
-  EXPECT_EQ(a, b);
-  absl::Time c(a);  // Copy construction (again)
-  EXPECT_EQ(a, b);
-  EXPECT_EQ(a, c);
-  EXPECT_EQ(b, c);
-  b = c;  // Assignment
-  EXPECT_EQ(a, b);
-  EXPECT_EQ(a, c);
-  EXPECT_EQ(b, c);
-}
-
-TEST(Time, UnixEpoch) {
-  const auto ci = absl::UTCTimeZone().At(absl::UnixEpoch());
-  EXPECT_EQ(absl::CivilSecond(1970, 1, 1, 0, 0, 0), ci.cs);
-  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
-  EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(ci.cs));
-}
-
-TEST(Time, Breakdown) {
-  absl::TimeZone tz = absl::time_internal::LoadTimeZone("America/New_York");
-  absl::Time t = absl::UnixEpoch();
-
-  // The Unix epoch as seen in NYC.
-  auto ci = tz.At(t);
-  EXPECT_CIVIL_INFO(ci, 1969, 12, 31, 19, 0, 0, -18000, false);
-  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
-  EXPECT_EQ(absl::Weekday::wednesday, absl::GetWeekday(ci.cs));
-
-  // Just before the epoch.
-  t -= absl::Nanoseconds(1);
-  ci = tz.At(t);
-  EXPECT_CIVIL_INFO(ci, 1969, 12, 31, 18, 59, 59, -18000, false);
-  EXPECT_EQ(absl::Nanoseconds(999999999), ci.subsecond);
-  EXPECT_EQ(absl::Weekday::wednesday, absl::GetWeekday(ci.cs));
-
-  // Some time later.
-  t += absl::Hours(24) * 2735;
-  t += absl::Hours(18) + absl::Minutes(30) + absl::Seconds(15) +
-       absl::Nanoseconds(9);
-  ci = tz.At(t);
-  EXPECT_CIVIL_INFO(ci, 1977, 6, 28, 14, 30, 15, -14400, true);
-  EXPECT_EQ(8, ci.subsecond / absl::Nanoseconds(1));
-  EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(ci.cs));
-}
-
-TEST(Time, AdditiveOperators) {
-  const absl::Duration d = absl::Nanoseconds(1);
-  const absl::Time t0;
-  const absl::Time t1 = t0 + d;
-
-  EXPECT_EQ(d, t1 - t0);
-  EXPECT_EQ(-d, t0 - t1);
-  EXPECT_EQ(t0, t1 - d);
-
-  absl::Time t(t0);
-  EXPECT_EQ(t0, t);
-  t += d;
-  EXPECT_EQ(t0 + d, t);
-  EXPECT_EQ(d, t - t0);
-  t -= d;
-  EXPECT_EQ(t0, t);
-
-  // Tests overflow between subseconds and seconds.
-  t = absl::UnixEpoch();
-  t += absl::Milliseconds(500);
-  EXPECT_EQ(absl::UnixEpoch() + absl::Milliseconds(500), t);
-  t += absl::Milliseconds(600);
-  EXPECT_EQ(absl::UnixEpoch() + absl::Milliseconds(1100), t);
-  t -= absl::Milliseconds(600);
-  EXPECT_EQ(absl::UnixEpoch() + absl::Milliseconds(500), t);
-  t -= absl::Milliseconds(500);
-  EXPECT_EQ(absl::UnixEpoch(), t);
-}
-
-TEST(Time, RelationalOperators) {
-  constexpr absl::Time t1 = absl::FromUnixNanos(0);
-  constexpr absl::Time t2 = absl::FromUnixNanos(1);
-  constexpr absl::Time t3 = absl::FromUnixNanos(2);
-
-  static_assert(absl::Time() == t1, "");
-  static_assert(t1 == t1, "");
-  static_assert(t2 == t2, "");
-  static_assert(t3 == t3, "");
-
-  static_assert(t1 < t2, "");
-  static_assert(t2 < t3, "");
-  static_assert(t1 < t3, "");
-
-  static_assert(t1 <= t1, "");
-  static_assert(t1 <= t2, "");
-  static_assert(t2 <= t2, "");
-  static_assert(t2 <= t3, "");
-  static_assert(t3 <= t3, "");
-  static_assert(t1 <= t3, "");
-
-  static_assert(t2 > t1, "");
-  static_assert(t3 > t2, "");
-  static_assert(t3 > t1, "");
-
-  static_assert(t2 >= t2, "");
-  static_assert(t2 >= t1, "");
-  static_assert(t3 >= t3, "");
-  static_assert(t3 >= t2, "");
-  static_assert(t1 >= t1, "");
-  static_assert(t3 >= t1, "");
-}
-
-TEST(Time, Infinity) {
-  constexpr absl::Time ifuture = absl::InfiniteFuture();
-  constexpr absl::Time ipast = absl::InfinitePast();
-
-  static_assert(ifuture == ifuture, "");
-  static_assert(ipast == ipast, "");
-  static_assert(ipast < ifuture, "");
-  static_assert(ifuture > ipast, "");
-
-  // Arithmetic saturates
-  EXPECT_EQ(ifuture, ifuture + absl::Seconds(1));
-  EXPECT_EQ(ifuture, ifuture - absl::Seconds(1));
-  EXPECT_EQ(ipast, ipast + absl::Seconds(1));
-  EXPECT_EQ(ipast, ipast - absl::Seconds(1));
-
-  EXPECT_EQ(absl::InfiniteDuration(), ifuture - ifuture);
-  EXPECT_EQ(absl::InfiniteDuration(), ifuture - ipast);
-  EXPECT_EQ(-absl::InfiniteDuration(), ipast - ifuture);
-  EXPECT_EQ(-absl::InfiniteDuration(), ipast - ipast);
-
-  constexpr absl::Time t = absl::UnixEpoch();  // Any finite time.
-  static_assert(t < ifuture, "");
-  static_assert(t > ipast, "");
-
-  EXPECT_EQ(ifuture, t + absl::InfiniteDuration());
-  EXPECT_EQ(ipast, t - absl::InfiniteDuration());
-}
-
-TEST(Time, FloorConversion) {
-#define TEST_FLOOR_CONVERSION(TO, FROM) \
-  EXPECT_EQ(1, TO(FROM(1001)));         \
-  EXPECT_EQ(1, TO(FROM(1000)));         \
-  EXPECT_EQ(0, TO(FROM(999)));          \
-  EXPECT_EQ(0, TO(FROM(1)));            \
-  EXPECT_EQ(0, TO(FROM(0)));            \
-  EXPECT_EQ(-1, TO(FROM(-1)));          \
-  EXPECT_EQ(-1, TO(FROM(-999)));        \
-  EXPECT_EQ(-1, TO(FROM(-1000)));       \
-  EXPECT_EQ(-2, TO(FROM(-1001)));
-
-  TEST_FLOOR_CONVERSION(absl::ToUnixMicros, absl::FromUnixNanos);
-  TEST_FLOOR_CONVERSION(absl::ToUnixMillis, absl::FromUnixMicros);
-  TEST_FLOOR_CONVERSION(absl::ToUnixSeconds, absl::FromUnixMillis);
-  TEST_FLOOR_CONVERSION(absl::ToTimeT, absl::FromUnixMillis);
-
-#undef TEST_FLOOR_CONVERSION
-
-  // Tests ToUnixNanos.
-  EXPECT_EQ(1, absl::ToUnixNanos(absl::UnixEpoch() + absl::Nanoseconds(3) / 2));
-  EXPECT_EQ(1, absl::ToUnixNanos(absl::UnixEpoch() + absl::Nanoseconds(1)));
-  EXPECT_EQ(0, absl::ToUnixNanos(absl::UnixEpoch() + absl::Nanoseconds(1) / 2));
-  EXPECT_EQ(0, absl::ToUnixNanos(absl::UnixEpoch() + absl::Nanoseconds(0)));
-  EXPECT_EQ(-1,
-            absl::ToUnixNanos(absl::UnixEpoch() - absl::Nanoseconds(1) / 2));
-  EXPECT_EQ(-1, absl::ToUnixNanos(absl::UnixEpoch() - absl::Nanoseconds(1)));
-  EXPECT_EQ(-2,
-            absl::ToUnixNanos(absl::UnixEpoch() - absl::Nanoseconds(3) / 2));
-
-  // Tests ToUniversal, which uses a different epoch than the tests above.
-  EXPECT_EQ(1,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(101)));
-  EXPECT_EQ(1,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(100)));
-  EXPECT_EQ(0,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(99)));
-  EXPECT_EQ(0,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(1)));
-  EXPECT_EQ(0,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(0)));
-  EXPECT_EQ(-1,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(-1)));
-  EXPECT_EQ(-1,
-            absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(-99)));
-  EXPECT_EQ(
-      -1, absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(-100)));
-  EXPECT_EQ(
-      -2, absl::ToUniversal(absl::UniversalEpoch() + absl::Nanoseconds(-101)));
-
-  // Tests ToTimespec()/TimeFromTimespec()
-  const struct {
-    absl::Time t;
-    timespec ts;
-  } to_ts[] = {
-      {absl::FromUnixSeconds(1) + absl::Nanoseconds(1), {1, 1}},
-      {absl::FromUnixSeconds(1) + absl::Nanoseconds(1) / 2, {1, 0}},
-      {absl::FromUnixSeconds(1) + absl::Nanoseconds(0), {1, 0}},
-      {absl::FromUnixSeconds(0) + absl::Nanoseconds(0), {0, 0}},
-      {absl::FromUnixSeconds(0) - absl::Nanoseconds(1) / 2, {-1, 999999999}},
-      {absl::FromUnixSeconds(0) - absl::Nanoseconds(1), {-1, 999999999}},
-      {absl::FromUnixSeconds(-1) + absl::Nanoseconds(1), {-1, 1}},
-      {absl::FromUnixSeconds(-1) + absl::Nanoseconds(1) / 2, {-1, 0}},
-      {absl::FromUnixSeconds(-1) + absl::Nanoseconds(0), {-1, 0}},
-      {absl::FromUnixSeconds(-1) - absl::Nanoseconds(1) / 2, {-2, 999999999}},
-  };
-  for (const auto& test : to_ts) {
-    EXPECT_THAT(absl::ToTimespec(test.t), TimespecMatcher(test.ts));
-  }
-  const struct {
-    timespec ts;
-    absl::Time t;
-  } from_ts[] = {
-      {{1, 1}, absl::FromUnixSeconds(1) + absl::Nanoseconds(1)},
-      {{1, 0}, absl::FromUnixSeconds(1) + absl::Nanoseconds(0)},
-      {{0, 0}, absl::FromUnixSeconds(0) + absl::Nanoseconds(0)},
-      {{0, -1}, absl::FromUnixSeconds(0) - absl::Nanoseconds(1)},
-      {{-1, 999999999}, absl::FromUnixSeconds(0) - absl::Nanoseconds(1)},
-      {{-1, 1}, absl::FromUnixSeconds(-1) + absl::Nanoseconds(1)},
-      {{-1, 0}, absl::FromUnixSeconds(-1) + absl::Nanoseconds(0)},
-      {{-1, -1}, absl::FromUnixSeconds(-1) - absl::Nanoseconds(1)},
-      {{-2, 999999999}, absl::FromUnixSeconds(-1) - absl::Nanoseconds(1)},
-  };
-  for (const auto& test : from_ts) {
-    EXPECT_EQ(test.t, absl::TimeFromTimespec(test.ts));
-  }
-
-  // Tests ToTimeval()/TimeFromTimeval() (same as timespec above)
-  const struct {
-    absl::Time t;
-    timeval tv;
-  } to_tv[] = {
-      {absl::FromUnixSeconds(1) + absl::Microseconds(1), {1, 1}},
-      {absl::FromUnixSeconds(1) + absl::Microseconds(1) / 2, {1, 0}},
-      {absl::FromUnixSeconds(1) + absl::Microseconds(0), {1, 0}},
-      {absl::FromUnixSeconds(0) + absl::Microseconds(0), {0, 0}},
-      {absl::FromUnixSeconds(0) - absl::Microseconds(1) / 2, {-1, 999999}},
-      {absl::FromUnixSeconds(0) - absl::Microseconds(1), {-1, 999999}},
-      {absl::FromUnixSeconds(-1) + absl::Microseconds(1), {-1, 1}},
-      {absl::FromUnixSeconds(-1) + absl::Microseconds(1) / 2, {-1, 0}},
-      {absl::FromUnixSeconds(-1) + absl::Microseconds(0), {-1, 0}},
-      {absl::FromUnixSeconds(-1) - absl::Microseconds(1) / 2, {-2, 999999}},
-  };
-  for (const auto& test : to_tv) {
-    EXPECT_THAT(ToTimeval(test.t), TimevalMatcher(test.tv));
-  }
-  const struct {
-    timeval tv;
-    absl::Time t;
-  } from_tv[] = {
-      {{1, 1}, absl::FromUnixSeconds(1) + absl::Microseconds(1)},
-      {{1, 0}, absl::FromUnixSeconds(1) + absl::Microseconds(0)},
-      {{0, 0}, absl::FromUnixSeconds(0) + absl::Microseconds(0)},
-      {{0, -1}, absl::FromUnixSeconds(0) - absl::Microseconds(1)},
-      {{-1, 999999}, absl::FromUnixSeconds(0) - absl::Microseconds(1)},
-      {{-1, 1}, absl::FromUnixSeconds(-1) + absl::Microseconds(1)},
-      {{-1, 0}, absl::FromUnixSeconds(-1) + absl::Microseconds(0)},
-      {{-1, -1}, absl::FromUnixSeconds(-1) - absl::Microseconds(1)},
-      {{-2, 999999}, absl::FromUnixSeconds(-1) - absl::Microseconds(1)},
-  };
-  for (const auto& test : from_tv) {
-    EXPECT_EQ(test.t, absl::TimeFromTimeval(test.tv));
-  }
-
-  // Tests flooring near negative infinity.
-  const int64_t min_plus_1 = std::numeric_limits<int64_t>::min() + 1;
-  EXPECT_EQ(min_plus_1, absl::ToUnixSeconds(absl::FromUnixSeconds(min_plus_1)));
-  EXPECT_EQ(std::numeric_limits<int64_t>::min(),
-            absl::ToUnixSeconds(absl::FromUnixSeconds(min_plus_1) -
-                                absl::Nanoseconds(1) / 2));
-
-  // Tests flooring near positive infinity.
-  EXPECT_EQ(std::numeric_limits<int64_t>::max(),
-            absl::ToUnixSeconds(
-                absl::FromUnixSeconds(std::numeric_limits<int64_t>::max()) +
-                absl::Nanoseconds(1) / 2));
-  EXPECT_EQ(std::numeric_limits<int64_t>::max(),
-            absl::ToUnixSeconds(
-                absl::FromUnixSeconds(std::numeric_limits<int64_t>::max())));
-  EXPECT_EQ(std::numeric_limits<int64_t>::max() - 1,
-            absl::ToUnixSeconds(
-                absl::FromUnixSeconds(std::numeric_limits<int64_t>::max()) -
-                absl::Nanoseconds(1) / 2));
-}
-
-TEST(Time, RoundtripConversion) {
-#define TEST_CONVERSION_ROUND_TRIP(SOURCE, FROM, TO, MATCHER) \
-  EXPECT_THAT(TO(FROM(SOURCE)), MATCHER(SOURCE))
-
-  // FromUnixNanos() and ToUnixNanos()
-  int64_t now_ns = absl::GetCurrentTimeNanos();
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromUnixNanos, absl::ToUnixNanos,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromUnixNanos, absl::ToUnixNanos,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromUnixNanos, absl::ToUnixNanos,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(now_ns, absl::FromUnixNanos, absl::ToUnixNanos,
-                             testing::Eq)
-      << now_ns;
-
-  // FromUnixMicros() and ToUnixMicros()
-  int64_t now_us = absl::GetCurrentTimeNanos() / 1000;
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromUnixMicros, absl::ToUnixMicros,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromUnixMicros, absl::ToUnixMicros,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromUnixMicros, absl::ToUnixMicros,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(now_us, absl::FromUnixMicros, absl::ToUnixMicros,
-                             testing::Eq)
-      << now_us;
-
-  // FromUnixMillis() and ToUnixMillis()
-  int64_t now_ms = absl::GetCurrentTimeNanos() / 1000000;
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromUnixMillis, absl::ToUnixMillis,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromUnixMillis, absl::ToUnixMillis,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromUnixMillis, absl::ToUnixMillis,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(now_ms, absl::FromUnixMillis, absl::ToUnixMillis,
-                             testing::Eq)
-      << now_ms;
-
-  // FromUnixSeconds() and ToUnixSeconds()
-  int64_t now_s = std::time(nullptr);
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromUnixSeconds, absl::ToUnixSeconds,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromUnixSeconds, absl::ToUnixSeconds,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromUnixSeconds, absl::ToUnixSeconds,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(now_s, absl::FromUnixSeconds, absl::ToUnixSeconds,
-                             testing::Eq)
-      << now_s;
-
-  // FromTimeT() and ToTimeT()
-  time_t now_time_t = std::time(nullptr);
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromTimeT, absl::ToTimeT, testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromTimeT, absl::ToTimeT, testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromTimeT, absl::ToTimeT, testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(now_time_t, absl::FromTimeT, absl::ToTimeT,
-                             testing::Eq)
-      << now_time_t;
-
-  // TimeFromTimeval() and ToTimeval()
-  timeval tv;
-  tv.tv_sec = -1;
-  tv.tv_usec = 0;
-  TEST_CONVERSION_ROUND_TRIP(tv, absl::TimeFromTimeval, absl::ToTimeval,
-                             TimevalMatcher);
-  tv.tv_sec = -1;
-  tv.tv_usec = 999999;
-  TEST_CONVERSION_ROUND_TRIP(tv, absl::TimeFromTimeval, absl::ToTimeval,
-                             TimevalMatcher);
-  tv.tv_sec = 0;
-  tv.tv_usec = 0;
-  TEST_CONVERSION_ROUND_TRIP(tv, absl::TimeFromTimeval, absl::ToTimeval,
-                             TimevalMatcher);
-  tv.tv_sec = 0;
-  tv.tv_usec = 1;
-  TEST_CONVERSION_ROUND_TRIP(tv, absl::TimeFromTimeval, absl::ToTimeval,
-                             TimevalMatcher);
-  tv.tv_sec = 1;
-  tv.tv_usec = 0;
-  TEST_CONVERSION_ROUND_TRIP(tv, absl::TimeFromTimeval, absl::ToTimeval,
-                             TimevalMatcher);
-
-  // TimeFromTimespec() and ToTimespec()
-  timespec ts;
-  ts.tv_sec = -1;
-  ts.tv_nsec = 0;
-  TEST_CONVERSION_ROUND_TRIP(ts, absl::TimeFromTimespec, absl::ToTimespec,
-                             TimespecMatcher);
-  ts.tv_sec = -1;
-  ts.tv_nsec = 999999999;
-  TEST_CONVERSION_ROUND_TRIP(ts, absl::TimeFromTimespec, absl::ToTimespec,
-                             TimespecMatcher);
-  ts.tv_sec = 0;
-  ts.tv_nsec = 0;
-  TEST_CONVERSION_ROUND_TRIP(ts, absl::TimeFromTimespec, absl::ToTimespec,
-                             TimespecMatcher);
-  ts.tv_sec = 0;
-  ts.tv_nsec = 1;
-  TEST_CONVERSION_ROUND_TRIP(ts, absl::TimeFromTimespec, absl::ToTimespec,
-                             TimespecMatcher);
-  ts.tv_sec = 1;
-  ts.tv_nsec = 0;
-  TEST_CONVERSION_ROUND_TRIP(ts, absl::TimeFromTimespec, absl::ToTimespec,
-                             TimespecMatcher);
-
-  // FromUDate() and ToUDate()
-  double now_ud = absl::GetCurrentTimeNanos() / 1000000;
-  TEST_CONVERSION_ROUND_TRIP(-1.5, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(-0.5, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(0.5, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(1.5, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq);
-  TEST_CONVERSION_ROUND_TRIP(now_ud, absl::FromUDate, absl::ToUDate,
-                             testing::DoubleEq)
-      << std::fixed << std::setprecision(17) << now_ud;
-
-  // FromUniversal() and ToUniversal()
-  int64_t now_uni = ((719162LL * (24 * 60 * 60)) * (1000 * 1000 * 10)) +
-                    (absl::GetCurrentTimeNanos() / 100);
-  TEST_CONVERSION_ROUND_TRIP(-1, absl::FromUniversal, absl::ToUniversal,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(0, absl::FromUniversal, absl::ToUniversal,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(1, absl::FromUniversal, absl::ToUniversal,
-                             testing::Eq);
-  TEST_CONVERSION_ROUND_TRIP(now_uni, absl::FromUniversal, absl::ToUniversal,
-                             testing::Eq)
-      << now_uni;
-
-#undef TEST_CONVERSION_ROUND_TRIP
-}
-
-template <typename Duration>
-std::chrono::system_clock::time_point MakeChronoUnixTime(const Duration& d) {
-  return std::chrono::system_clock::from_time_t(0) + d;
-}
-
-TEST(Time, FromChrono) {
-  EXPECT_EQ(absl::FromTimeT(-1),
-            absl::FromChrono(std::chrono::system_clock::from_time_t(-1)));
-  EXPECT_EQ(absl::FromTimeT(0),
-            absl::FromChrono(std::chrono::system_clock::from_time_t(0)));
-  EXPECT_EQ(absl::FromTimeT(1),
-            absl::FromChrono(std::chrono::system_clock::from_time_t(1)));
-
-  EXPECT_EQ(
-      absl::FromUnixMillis(-1),
-      absl::FromChrono(MakeChronoUnixTime(std::chrono::milliseconds(-1))));
-  EXPECT_EQ(absl::FromUnixMillis(0),
-            absl::FromChrono(MakeChronoUnixTime(std::chrono::milliseconds(0))));
-  EXPECT_EQ(absl::FromUnixMillis(1),
-            absl::FromChrono(MakeChronoUnixTime(std::chrono::milliseconds(1))));
-
-  // Chrono doesn't define exactly its range and precision (neither does
-  // absl::Time), so let's simply test +/- ~100 years to make sure things work.
-  const auto century_sec = 60 * 60 * 24 * 365 * int64_t{100};
-  const auto century = std::chrono::seconds(century_sec);
-  const auto chrono_future = MakeChronoUnixTime(century);
-  const auto chrono_past = MakeChronoUnixTime(-century);
-  EXPECT_EQ(absl::FromUnixSeconds(century_sec),
-            absl::FromChrono(chrono_future));
-  EXPECT_EQ(absl::FromUnixSeconds(-century_sec), absl::FromChrono(chrono_past));
-
-  // Roundtrip them both back to chrono.
-  EXPECT_EQ(chrono_future,
-            absl::ToChronoTime(absl::FromUnixSeconds(century_sec)));
-  EXPECT_EQ(chrono_past,
-            absl::ToChronoTime(absl::FromUnixSeconds(-century_sec)));
-}
-
-TEST(Time, ToChronoTime) {
-  EXPECT_EQ(std::chrono::system_clock::from_time_t(-1),
-            absl::ToChronoTime(absl::FromTimeT(-1)));
-  EXPECT_EQ(std::chrono::system_clock::from_time_t(0),
-            absl::ToChronoTime(absl::FromTimeT(0)));
-  EXPECT_EQ(std::chrono::system_clock::from_time_t(1),
-            absl::ToChronoTime(absl::FromTimeT(1)));
-
-  EXPECT_EQ(MakeChronoUnixTime(std::chrono::milliseconds(-1)),
-            absl::ToChronoTime(absl::FromUnixMillis(-1)));
-  EXPECT_EQ(MakeChronoUnixTime(std::chrono::milliseconds(0)),
-            absl::ToChronoTime(absl::FromUnixMillis(0)));
-  EXPECT_EQ(MakeChronoUnixTime(std::chrono::milliseconds(1)),
-            absl::ToChronoTime(absl::FromUnixMillis(1)));
-
-  // Time before the Unix epoch should floor, not trunc.
-  const auto tick = absl::Nanoseconds(1) / 4;
-  EXPECT_EQ(std::chrono::system_clock::from_time_t(0) -
-                std::chrono::system_clock::duration(1),
-            absl::ToChronoTime(absl::UnixEpoch() - tick));
-}
-
-// Check that absl::int128 works as a std::chrono::duration representation.
-TEST(Time, Chrono128) {
-  // Define a std::chrono::time_point type whose time[sic]_since_epoch() is
-  // a signed 128-bit count of attoseconds. This has a range and resolution
-  // (currently) beyond those of absl::Time, and undoubtedly also beyond those
-  // of std::chrono::system_clock::time_point.
-  //
-  // Note: The to/from-chrono support should probably be updated to handle
-  // such wide representations.
-  using Timestamp =
-      std::chrono::time_point<std::chrono::system_clock,
-                              std::chrono::duration<absl::int128, std::atto>>;
-
-  // Expect that we can round-trip the std::chrono::system_clock::time_point
-  // extremes through both absl::Time and Timestamp, and that Timestamp can
-  // handle the (current) absl::Time extremes.
-  //
-  // Note: We should use std::chrono::floor() instead of time_point_cast(),
-  // but floor() is only available since c++17.
-  for (const auto tp : {std::chrono::system_clock::time_point::min(),
-                        std::chrono::system_clock::time_point::max()}) {
-    EXPECT_EQ(tp, absl::ToChronoTime(absl::FromChrono(tp)));
-    EXPECT_EQ(tp, std::chrono::time_point_cast<
-                      std::chrono::system_clock::time_point::duration>(
-                      std::chrono::time_point_cast<Timestamp::duration>(tp)));
-  }
-  Timestamp::duration::rep v = std::numeric_limits<int64_t>::min();
-  v *= Timestamp::duration::period::den;
-  auto ts = Timestamp(Timestamp::duration(v));
-  ts += std::chrono::duration<int64_t, std::atto>(0);
-  EXPECT_EQ(std::numeric_limits<int64_t>::min(),
-            ts.time_since_epoch().count() / Timestamp::duration::period::den);
-  EXPECT_EQ(0,
-            ts.time_since_epoch().count() % Timestamp::duration::period::den);
-  v = std::numeric_limits<int64_t>::max();
-  v *= Timestamp::duration::period::den;
-  ts = Timestamp(Timestamp::duration(v));
-  ts += std::chrono::duration<int64_t, std::atto>(999999999750000000);
-  EXPECT_EQ(std::numeric_limits<int64_t>::max(),
-            ts.time_since_epoch().count() / Timestamp::duration::period::den);
-  EXPECT_EQ(999999999750000000,
-            ts.time_since_epoch().count() % Timestamp::duration::period::den);
-}
-
-TEST(Time, TimeZoneAt) {
-  const absl::TimeZone nyc =
-      absl::time_internal::LoadTimeZone("America/New_York");
-  const std::string fmt = "%a, %e %b %Y %H:%M:%S %z (%Z)";
-
-  // A non-transition where the civil time is unique.
-  absl::CivilSecond nov01(2013, 11, 1, 8, 30, 0);
-  const auto nov01_ci = nyc.At(nov01);
-  EXPECT_EQ(absl::TimeZone::TimeInfo::UNIQUE, nov01_ci.kind);
-  EXPECT_EQ("Fri,  1 Nov 2013 08:30:00 -0400 (EDT)",
-            absl::FormatTime(fmt, nov01_ci.pre, nyc));
-  EXPECT_EQ(nov01_ci.pre, nov01_ci.trans);
-  EXPECT_EQ(nov01_ci.pre, nov01_ci.post);
-  EXPECT_EQ(nov01_ci.pre, absl::FromCivil(nov01, nyc));
-
-  // A Spring DST transition, when there is a gap in civil time
-  // and we prefer the later of the possible interpretations of a
-  // non-existent time.
-  absl::CivilSecond mar13(2011, 3, 13, 2, 15, 0);
-  const auto mar_ci = nyc.At(mar13);
-  EXPECT_EQ(absl::TimeZone::TimeInfo::SKIPPED, mar_ci.kind);
-  EXPECT_EQ("Sun, 13 Mar 2011 03:15:00 -0400 (EDT)",
-            absl::FormatTime(fmt, mar_ci.pre, nyc));
-  EXPECT_EQ("Sun, 13 Mar 2011 03:00:00 -0400 (EDT)",
-            absl::FormatTime(fmt, mar_ci.trans, nyc));
-  EXPECT_EQ("Sun, 13 Mar 2011 01:15:00 -0500 (EST)",
-            absl::FormatTime(fmt, mar_ci.post, nyc));
-  EXPECT_EQ(mar_ci.trans, absl::FromCivil(mar13, nyc));
-
-  // A Fall DST transition, when civil times are repeated and
-  // we prefer the earlier of the possible interpretations of an
-  // ambiguous time.
-  absl::CivilSecond nov06(2011, 11, 6, 1, 15, 0);
-  const auto nov06_ci = nyc.At(nov06);
-  EXPECT_EQ(absl::TimeZone::TimeInfo::REPEATED, nov06_ci.kind);
-  EXPECT_EQ("Sun,  6 Nov 2011 01:15:00 -0400 (EDT)",
-            absl::FormatTime(fmt, nov06_ci.pre, nyc));
-  EXPECT_EQ("Sun,  6 Nov 2011 01:00:00 -0500 (EST)",
-            absl::FormatTime(fmt, nov06_ci.trans, nyc));
-  EXPECT_EQ("Sun,  6 Nov 2011 01:15:00 -0500 (EST)",
-            absl::FormatTime(fmt, nov06_ci.post, nyc));
-  EXPECT_EQ(nov06_ci.pre, absl::FromCivil(nov06, nyc));
-
-  // Check that (time_t) -1 is handled correctly.
-  absl::CivilSecond minus1(1969, 12, 31, 18, 59, 59);
-  const auto minus1_cl = nyc.At(minus1);
-  EXPECT_EQ(absl::TimeZone::TimeInfo::UNIQUE, minus1_cl.kind);
-  EXPECT_EQ(-1, absl::ToTimeT(minus1_cl.pre));
-  EXPECT_EQ("Wed, 31 Dec 1969 18:59:59 -0500 (EST)",
-            absl::FormatTime(fmt, minus1_cl.pre, nyc));
-  EXPECT_EQ("Wed, 31 Dec 1969 23:59:59 +0000 (UTC)",
-            absl::FormatTime(fmt, minus1_cl.pre, absl::UTCTimeZone()));
-}
-
-// FromCivil(CivilSecond(year, mon, day, hour, min, sec), UTCTimeZone())
-// has a specialized fastpath implementation, which we exercise here.
-TEST(Time, FromCivilUTC) {
-  const absl::TimeZone utc = absl::UTCTimeZone();
-  const std::string fmt = "%a, %e %b %Y %H:%M:%S %z (%Z)";
-  const int kMax = std::numeric_limits<int>::max();
-  const int kMin = std::numeric_limits<int>::min();
-  absl::Time t;
-
-  // 292091940881 is the last positive year to use the fastpath.
-  t = absl::FromCivil(
-      absl::CivilSecond(292091940881, kMax, kMax, kMax, kMax, kMax), utc);
-  EXPECT_EQ("Fri, 25 Nov 292277026596 12:21:07 +0000 (UTC)",
-            absl::FormatTime(fmt, t, utc));
-  t = absl::FromCivil(
-      absl::CivilSecond(292091940882, kMax, kMax, kMax, kMax, kMax), utc);
-  EXPECT_EQ("infinite-future", absl::FormatTime(fmt, t, utc));  // no overflow
-
-  // -292091936940 is the last negative year to use the fastpath.
-  t = absl::FromCivil(
-      absl::CivilSecond(-292091936940, kMin, kMin, kMin, kMin, kMin), utc);
-  EXPECT_EQ("Fri,  1 Nov -292277022657 10:37:52 +0000 (UTC)",
-            absl::FormatTime(fmt, t, utc));
-  t = absl::FromCivil(
-      absl::CivilSecond(-292091936941, kMin, kMin, kMin, kMin, kMin), utc);
-  EXPECT_EQ("infinite-past", absl::FormatTime(fmt, t, utc));  // no underflow
-
-  // Check that we're counting leap years correctly.
-  t = absl::FromCivil(absl::CivilSecond(1900, 2, 28, 23, 59, 59), utc);
-  EXPECT_EQ("Wed, 28 Feb 1900 23:59:59 +0000 (UTC)",
-            absl::FormatTime(fmt, t, utc));
-  t = absl::FromCivil(absl::CivilSecond(1900, 3, 1, 0, 0, 0), utc);
-  EXPECT_EQ("Thu,  1 Mar 1900 00:00:00 +0000 (UTC)",
-            absl::FormatTime(fmt, t, utc));
-  t = absl::FromCivil(absl::CivilSecond(2000, 2, 29, 23, 59, 59), utc);
-  EXPECT_EQ("Tue, 29 Feb 2000 23:59:59 +0000 (UTC)",
-            absl::FormatTime(fmt, t, utc));
-  t = absl::FromCivil(absl::CivilSecond(2000, 3, 1, 0, 0, 0), utc);
-  EXPECT_EQ("Wed,  1 Mar 2000 00:00:00 +0000 (UTC)",
-            absl::FormatTime(fmt, t, utc));
-}
-
-TEST(Time, ToTM) {
-  const absl::TimeZone utc = absl::UTCTimeZone();
-
-  // Compares the results of ToTM() to gmtime_r() for lots of times over the
-  // course of a few days.
-  const absl::Time start =
-      absl::FromCivil(absl::CivilSecond(2014, 1, 2, 3, 4, 5), utc);
-  const absl::Time end =
-      absl::FromCivil(absl::CivilSecond(2014, 1, 5, 3, 4, 5), utc);
-  for (absl::Time t = start; t < end; t += absl::Seconds(30)) {
-    const struct tm tm_bt = ToTM(t, utc);
-    const time_t tt = absl::ToTimeT(t);
-    struct tm tm_lc;
-#ifdef _WIN32
-    gmtime_s(&tm_lc, &tt);
-#else
-    gmtime_r(&tt, &tm_lc);
-#endif
-    EXPECT_EQ(tm_lc.tm_year, tm_bt.tm_year);
-    EXPECT_EQ(tm_lc.tm_mon, tm_bt.tm_mon);
-    EXPECT_EQ(tm_lc.tm_mday, tm_bt.tm_mday);
-    EXPECT_EQ(tm_lc.tm_hour, tm_bt.tm_hour);
-    EXPECT_EQ(tm_lc.tm_min, tm_bt.tm_min);
-    EXPECT_EQ(tm_lc.tm_sec, tm_bt.tm_sec);
-    EXPECT_EQ(tm_lc.tm_wday, tm_bt.tm_wday);
-    EXPECT_EQ(tm_lc.tm_yday, tm_bt.tm_yday);
-    EXPECT_EQ(tm_lc.tm_isdst, tm_bt.tm_isdst);
-
-    ASSERT_FALSE(HasFailure());
-  }
-
-  // Checks that the tm_isdst field is correct when in standard time.
-  const absl::TimeZone nyc =
-      absl::time_internal::LoadTimeZone("America/New_York");
-  absl::Time t = absl::FromCivil(absl::CivilSecond(2014, 3, 1, 0, 0, 0), nyc);
-  struct tm tm = ToTM(t, nyc);
-  EXPECT_FALSE(tm.tm_isdst);
-
-  // Checks that the tm_isdst field is correct when in daylight time.
-  t = absl::FromCivil(absl::CivilSecond(2014, 4, 1, 0, 0, 0), nyc);
-  tm = ToTM(t, nyc);
-  EXPECT_TRUE(tm.tm_isdst);
-
-  // Checks overflow.
-  tm = ToTM(absl::InfiniteFuture(), nyc);
-  EXPECT_EQ(std::numeric_limits<int>::max() - 1900, tm.tm_year);
-  EXPECT_EQ(11, tm.tm_mon);
-  EXPECT_EQ(31, tm.tm_mday);
-  EXPECT_EQ(23, tm.tm_hour);
-  EXPECT_EQ(59, tm.tm_min);
-  EXPECT_EQ(59, tm.tm_sec);
-  EXPECT_EQ(4, tm.tm_wday);
-  EXPECT_EQ(364, tm.tm_yday);
-  EXPECT_FALSE(tm.tm_isdst);
-
-  // Checks underflow.
-  tm = ToTM(absl::InfinitePast(), nyc);
-  EXPECT_EQ(std::numeric_limits<int>::min(), tm.tm_year);
-  EXPECT_EQ(0, tm.tm_mon);
-  EXPECT_EQ(1, tm.tm_mday);
-  EXPECT_EQ(0, tm.tm_hour);
-  EXPECT_EQ(0, tm.tm_min);
-  EXPECT_EQ(0, tm.tm_sec);
-  EXPECT_EQ(0, tm.tm_wday);
-  EXPECT_EQ(0, tm.tm_yday);
-  EXPECT_FALSE(tm.tm_isdst);
-}
-
-TEST(Time, FromTM) {
-  const absl::TimeZone nyc =
-      absl::time_internal::LoadTimeZone("America/New_York");
-
-  // Verifies that tm_isdst doesn't affect anything when the time is unique.
-  struct tm tm;
-  std::memset(&tm, 0, sizeof(tm));
-  tm.tm_year = 2014 - 1900;
-  tm.tm_mon = 6 - 1;
-  tm.tm_mday = 28;
-  tm.tm_hour = 1;
-  tm.tm_min = 2;
-  tm.tm_sec = 3;
-  tm.tm_isdst = -1;
-  absl::Time t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-06-28T01:02:03-04:00", absl::FormatTime(t, nyc));  // DST
-  tm.tm_isdst = 0;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-06-28T01:02:03-04:00", absl::FormatTime(t, nyc));  // DST
-  tm.tm_isdst = 1;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-06-28T01:02:03-04:00", absl::FormatTime(t, nyc));  // DST
-
-  // Adjusts tm to refer to an ambiguous time.
-  tm.tm_year = 2014 - 1900;
-  tm.tm_mon = 11 - 1;
-  tm.tm_mday = 2;
-  tm.tm_hour = 1;
-  tm.tm_min = 30;
-  tm.tm_sec = 42;
-  tm.tm_isdst = -1;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-11-02T01:30:42-04:00", absl::FormatTime(t, nyc));  // DST
-  tm.tm_isdst = 0;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-11-02T01:30:42-05:00", absl::FormatTime(t, nyc));  // STD
-  tm.tm_isdst = 1;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-11-02T01:30:42-04:00", absl::FormatTime(t, nyc));  // DST
-
-  // Adjusts tm to refer to a skipped time.
-  tm.tm_year = 2014 - 1900;
-  tm.tm_mon = 3 - 1;
-  tm.tm_mday = 9;
-  tm.tm_hour = 2;
-  tm.tm_min = 30;
-  tm.tm_sec = 42;
-  tm.tm_isdst = -1;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-03-09T03:30:42-04:00", absl::FormatTime(t, nyc));  // DST
-  tm.tm_isdst = 0;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-03-09T01:30:42-05:00", absl::FormatTime(t, nyc));  // STD
-  tm.tm_isdst = 1;
-  t = FromTM(tm, nyc);
-  EXPECT_EQ("2014-03-09T03:30:42-04:00", absl::FormatTime(t, nyc));  // DST
-
-  // Adjusts tm to refer to a time with a year larger than 2147483647.
-  tm.tm_year = 2147483647 - 1900 + 1;
-  tm.tm_mon = 6 - 1;
-  tm.tm_mday = 28;
-  tm.tm_hour = 1;
-  tm.tm_min = 2;
-  tm.tm_sec = 3;
-  tm.tm_isdst = -1;
-  t = FromTM(tm, absl::UTCTimeZone());
-  EXPECT_EQ("2147483648-06-28T01:02:03+00:00",
-            absl::FormatTime(t, absl::UTCTimeZone()));
-
-  // Adjusts tm to refer to a time with a very large month.
-  tm.tm_year = 2019 - 1900;
-  tm.tm_mon = 2147483647;
-  tm.tm_mday = 28;
-  tm.tm_hour = 1;
-  tm.tm_min = 2;
-  tm.tm_sec = 3;
-  tm.tm_isdst = -1;
-  t = FromTM(tm, absl::UTCTimeZone());
-  EXPECT_EQ("178958989-08-28T01:02:03+00:00",
-            absl::FormatTime(t, absl::UTCTimeZone()));
-}
-
-TEST(Time, TMRoundTrip) {
-  const absl::TimeZone nyc =
-      absl::time_internal::LoadTimeZone("America/New_York");
-
-  // Test round-tripping across a skipped transition
-  absl::Time start = absl::FromCivil(absl::CivilHour(2014, 3, 9, 0), nyc);
-  absl::Time end = absl::FromCivil(absl::CivilHour(2014, 3, 9, 4), nyc);
-  for (absl::Time t = start; t < end; t += absl::Minutes(1)) {
-    struct tm tm = ToTM(t, nyc);
-    absl::Time rt = FromTM(tm, nyc);
-    EXPECT_EQ(rt, t);
-  }
-
-  // Test round-tripping across an ambiguous transition
-  start = absl::FromCivil(absl::CivilHour(2014, 11, 2, 0), nyc);
-  end = absl::FromCivil(absl::CivilHour(2014, 11, 2, 4), nyc);
-  for (absl::Time t = start; t < end; t += absl::Minutes(1)) {
-    struct tm tm = ToTM(t, nyc);
-    absl::Time rt = FromTM(tm, nyc);
-    EXPECT_EQ(rt, t);
-  }
-
-  // Test round-tripping of unique instants crossing a day boundary
-  start = absl::FromCivil(absl::CivilHour(2014, 6, 27, 22), nyc);
-  end = absl::FromCivil(absl::CivilHour(2014, 6, 28, 4), nyc);
-  for (absl::Time t = start; t < end; t += absl::Minutes(1)) {
-    struct tm tm = ToTM(t, nyc);
-    absl::Time rt = FromTM(tm, nyc);
-    EXPECT_EQ(rt, t);
-  }
-}
-
-TEST(Time, Range) {
-  // The API's documented range is +/- 100 billion years.
-  const absl::Duration range = absl::Hours(24) * 365.2425 * 100000000000;
-
-  // Arithmetic and comparison still works at +/-range around base values.
-  absl::Time bases[2] = {absl::UnixEpoch(), absl::Now()};
-  for (const auto base : bases) {
-    absl::Time bottom = base - range;
-    EXPECT_GT(bottom, bottom - absl::Nanoseconds(1));
-    EXPECT_LT(bottom, bottom + absl::Nanoseconds(1));
-    absl::Time top = base + range;
-    EXPECT_GT(top, top - absl::Nanoseconds(1));
-    EXPECT_LT(top, top + absl::Nanoseconds(1));
-    absl::Duration full_range = 2 * range;
-    EXPECT_EQ(full_range, top - bottom);
-    EXPECT_EQ(-full_range, bottom - top);
-  }
-}
-
-TEST(Time, Limits) {
-  // It is an implementation detail that Time().rep_ == ZeroDuration(),
-  // and that the resolution of a Duration is 1/4 of a nanosecond.
-  const absl::Time zero;
-  const absl::Time max =
-      zero + absl::Seconds(std::numeric_limits<int64_t>::max()) +
-      absl::Nanoseconds(999999999) + absl::Nanoseconds(3) / 4;
-  const absl::Time min =
-      zero + absl::Seconds(std::numeric_limits<int64_t>::min());
-
-  // Some simple max/min bounds checks.
-  EXPECT_LT(max, absl::InfiniteFuture());
-  EXPECT_GT(min, absl::InfinitePast());
-  EXPECT_LT(zero, max);
-  EXPECT_GT(zero, min);
-  EXPECT_GE(absl::UnixEpoch(), min);
-  EXPECT_LT(absl::UnixEpoch(), max);
-
-  // Check sign of Time differences.
-  EXPECT_LT(absl::ZeroDuration(), max - zero);
-  EXPECT_LT(absl::ZeroDuration(),
-            zero - absl::Nanoseconds(1) / 4 - min);  // avoid zero - min
-
-  // Arithmetic works at max - 0.25ns and min + 0.25ns.
-  EXPECT_GT(max, max - absl::Nanoseconds(1) / 4);
-  EXPECT_LT(min, min + absl::Nanoseconds(1) / 4);
-}
-
-TEST(Time, ConversionSaturation) {
-  const absl::TimeZone utc = absl::UTCTimeZone();
-  absl::Time t;
-
-  const auto max_time_t = std::numeric_limits<time_t>::max();
-  const auto min_time_t = std::numeric_limits<time_t>::min();
-  time_t tt = max_time_t - 1;
-  t = absl::FromTimeT(tt);
-  tt = absl::ToTimeT(t);
-  EXPECT_EQ(max_time_t - 1, tt);
-  t += absl::Seconds(1);
-  tt = absl::ToTimeT(t);
-  EXPECT_EQ(max_time_t, tt);
-  t += absl::Seconds(1);  // no effect
-  tt = absl::ToTimeT(t);
-  EXPECT_EQ(max_time_t, tt);
-
-  tt = min_time_t + 1;
-  t = absl::FromTimeT(tt);
-  tt = absl::ToTimeT(t);
-  EXPECT_EQ(min_time_t + 1, tt);
-  t -= absl::Seconds(1);
-  tt = absl::ToTimeT(t);
-  EXPECT_EQ(min_time_t, tt);
-  t -= absl::Seconds(1);  // no effect
-  tt = absl::ToTimeT(t);
-  EXPECT_EQ(min_time_t, tt);
-
-  const auto max_timeval_sec =
-      std::numeric_limits<decltype(timeval::tv_sec)>::max();
-  const auto min_timeval_sec =
-      std::numeric_limits<decltype(timeval::tv_sec)>::min();
-  timeval tv;
-  tv.tv_sec = max_timeval_sec;
-  tv.tv_usec = 999998;
-  t = absl::TimeFromTimeval(tv);
-  tv = ToTimeval(t);
-  EXPECT_EQ(max_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(999998, tv.tv_usec);
-  t += absl::Microseconds(1);
-  tv = ToTimeval(t);
-  EXPECT_EQ(max_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(999999, tv.tv_usec);
-  t += absl::Microseconds(1);  // no effect
-  tv = ToTimeval(t);
-  EXPECT_EQ(max_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(999999, tv.tv_usec);
-
-  tv.tv_sec = min_timeval_sec;
-  tv.tv_usec = 1;
-  t = absl::TimeFromTimeval(tv);
-  tv = ToTimeval(t);
-  EXPECT_EQ(min_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(1, tv.tv_usec);
-  t -= absl::Microseconds(1);
-  tv = ToTimeval(t);
-  EXPECT_EQ(min_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(0, tv.tv_usec);
-  t -= absl::Microseconds(1);  // no effect
-  tv = ToTimeval(t);
-  EXPECT_EQ(min_timeval_sec, tv.tv_sec);
-  EXPECT_EQ(0, tv.tv_usec);
-
-  const auto max_timespec_sec =
-      std::numeric_limits<decltype(timespec::tv_sec)>::max();
-  const auto min_timespec_sec =
-      std::numeric_limits<decltype(timespec::tv_sec)>::min();
-  timespec ts;
-  ts.tv_sec = max_timespec_sec;
-  ts.tv_nsec = 999999998;
-  t = absl::TimeFromTimespec(ts);
-  ts = absl::ToTimespec(t);
-  EXPECT_EQ(max_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(999999998, ts.tv_nsec);
-  t += absl::Nanoseconds(1);
-  ts = absl::ToTimespec(t);
-  EXPECT_EQ(max_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(999999999, ts.tv_nsec);
-  t += absl::Nanoseconds(1);  // no effect
-  ts = absl::ToTimespec(t);
-  EXPECT_EQ(max_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(999999999, ts.tv_nsec);
-
-  ts.tv_sec = min_timespec_sec;
-  ts.tv_nsec = 1;
-  t = absl::TimeFromTimespec(ts);
-  ts = absl::ToTimespec(t);
-  EXPECT_EQ(min_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(1, ts.tv_nsec);
-  t -= absl::Nanoseconds(1);
-  ts = absl::ToTimespec(t);
-  EXPECT_EQ(min_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(0, ts.tv_nsec);
-  t -= absl::Nanoseconds(1);  // no effect
-  ts = absl::ToTimespec(t);
-  EXPECT_EQ(min_timespec_sec, ts.tv_sec);
-  EXPECT_EQ(0, ts.tv_nsec);
-
-  // Checks how TimeZone::At() saturates on infinities.
-  auto ci = utc.At(absl::InfiniteFuture());
-  EXPECT_CIVIL_INFO(ci, std::numeric_limits<int64_t>::max(), 12, 31, 23, 59, 59,
-                    0, false);
-  EXPECT_EQ(absl::InfiniteDuration(), ci.subsecond);
-  EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(ci.cs));
-  EXPECT_EQ(365, absl::GetYearDay(ci.cs));
-  EXPECT_STREQ("-00", ci.zone_abbr);  // artifact of TimeZone::At()
-  ci = utc.At(absl::InfinitePast());
-  EXPECT_CIVIL_INFO(ci, std::numeric_limits<int64_t>::min(), 1, 1, 0, 0, 0, 0,
-                    false);
-  EXPECT_EQ(-absl::InfiniteDuration(), ci.subsecond);
-  EXPECT_EQ(absl::Weekday::sunday, absl::GetWeekday(ci.cs));
-  EXPECT_EQ(1, absl::GetYearDay(ci.cs));
-  EXPECT_STREQ("-00", ci.zone_abbr);  // artifact of TimeZone::At()
-
-  // Approach the maximal Time value from below.
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 4, 15, 30, 6), utc);
-  EXPECT_EQ("292277026596-12-04T15:30:06+00:00",
-            absl::FormatTime(absl::RFC3339_full, t, utc));
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 4, 15, 30, 7), utc);
-  EXPECT_EQ("292277026596-12-04T15:30:07+00:00",
-            absl::FormatTime(absl::RFC3339_full, t, utc));
-  EXPECT_EQ(
-      absl::UnixEpoch() + absl::Seconds(std::numeric_limits<int64_t>::max()),
-      t);
-
-  // Checks that we can also get the maximal Time value for a far-east zone.
-  const absl::TimeZone plus14 = absl::FixedTimeZone(14 * 60 * 60);
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 5, 5, 30, 7), plus14);
-  EXPECT_EQ("292277026596-12-05T05:30:07+14:00",
-            absl::FormatTime(absl::RFC3339_full, t, plus14));
-  EXPECT_EQ(
-      absl::UnixEpoch() + absl::Seconds(std::numeric_limits<int64_t>::max()),
-      t);
-
-  // One second later should push us to infinity.
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 4, 15, 30, 8), utc);
-  EXPECT_EQ("infinite-future", absl::FormatTime(absl::RFC3339_full, t, utc));
-
-  // Approach the minimal Time value from above.
-  t = absl::FromCivil(absl::CivilSecond(-292277022657, 1, 27, 8, 29, 53), utc);
-  EXPECT_EQ("-292277022657-01-27T08:29:53+00:00",
-            absl::FormatTime(absl::RFC3339_full, t, utc));
-  t = absl::FromCivil(absl::CivilSecond(-292277022657, 1, 27, 8, 29, 52), utc);
-  EXPECT_EQ("-292277022657-01-27T08:29:52+00:00",
-            absl::FormatTime(absl::RFC3339_full, t, utc));
-  EXPECT_EQ(
-      absl::UnixEpoch() + absl::Seconds(std::numeric_limits<int64_t>::min()),
-      t);
-
-  // Checks that we can also get the minimal Time value for a far-west zone.
-  const absl::TimeZone minus12 = absl::FixedTimeZone(-12 * 60 * 60);
-  t = absl::FromCivil(absl::CivilSecond(-292277022657, 1, 26, 20, 29, 52),
-                      minus12);
-  EXPECT_EQ("-292277022657-01-26T20:29:52-12:00",
-            absl::FormatTime(absl::RFC3339_full, t, minus12));
-  EXPECT_EQ(
-      absl::UnixEpoch() + absl::Seconds(std::numeric_limits<int64_t>::min()),
-      t);
-
-  // One second before should push us to -infinity.
-  t = absl::FromCivil(absl::CivilSecond(-292277022657, 1, 27, 8, 29, 51), utc);
-  EXPECT_EQ("infinite-past", absl::FormatTime(absl::RFC3339_full, t, utc));
-}
-
-// In zones with POSIX-style recurring rules we use special logic to
-// handle conversions in the distant future.  Here we check the limits
-// of those conversions, particularly with respect to integer overflow.
-TEST(Time, ExtendedConversionSaturation) {
-  const absl::TimeZone syd =
-      absl::time_internal::LoadTimeZone("Australia/Sydney");
-  const absl::TimeZone nyc =
-      absl::time_internal::LoadTimeZone("America/New_York");
-  const absl::Time max =
-      absl::FromUnixSeconds(std::numeric_limits<int64_t>::max());
-  absl::TimeZone::CivilInfo ci;
-  absl::Time t;
-
-  // The maximal time converted in each zone.
-  ci = syd.At(max);
-  EXPECT_CIVIL_INFO(ci, 292277026596, 12, 5, 2, 30, 7, 39600, true);
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 5, 2, 30, 7), syd);
-  EXPECT_EQ(max, t);
-  ci = nyc.At(max);
-  EXPECT_CIVIL_INFO(ci, 292277026596, 12, 4, 10, 30, 7, -18000, false);
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 4, 10, 30, 7), nyc);
-  EXPECT_EQ(max, t);
-
-  // One second later should push us to infinity.
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 5, 2, 30, 8), syd);
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 4, 10, 30, 8), nyc);
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-
-  // And we should stick there.
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 5, 2, 30, 9), syd);
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-  t = absl::FromCivil(absl::CivilSecond(292277026596, 12, 4, 10, 30, 9), nyc);
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-
-  // All the way up to a saturated date/time, without overflow.
-  t = absl::FromCivil(absl::CivilSecond::max(), syd);
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-  t = absl::FromCivil(absl::CivilSecond::max(), nyc);
-  EXPECT_EQ(absl::InfiniteFuture(), t);
-}
-
-TEST(Time, FromCivilAlignment) {
-  const absl::TimeZone utc = absl::UTCTimeZone();
-  const absl::CivilSecond cs(2015, 2, 3, 4, 5, 6);
-  absl::Time t = absl::FromCivil(cs, utc);
-  EXPECT_EQ("2015-02-03T04:05:06+00:00", absl::FormatTime(t, utc));
-  t = absl::FromCivil(absl::CivilMinute(cs), utc);
-  EXPECT_EQ("2015-02-03T04:05:00+00:00", absl::FormatTime(t, utc));
-  t = absl::FromCivil(absl::CivilHour(cs), utc);
-  EXPECT_EQ("2015-02-03T04:00:00+00:00", absl::FormatTime(t, utc));
-  t = absl::FromCivil(absl::CivilDay(cs), utc);
-  EXPECT_EQ("2015-02-03T00:00:00+00:00", absl::FormatTime(t, utc));
-  t = absl::FromCivil(absl::CivilMonth(cs), utc);
-  EXPECT_EQ("2015-02-01T00:00:00+00:00", absl::FormatTime(t, utc));
-  t = absl::FromCivil(absl::CivilYear(cs), utc);
-  EXPECT_EQ("2015-01-01T00:00:00+00:00", absl::FormatTime(t, utc));
-}
-
-TEST(Time, LegacyDateTime) {
-  const absl::TimeZone utc = absl::UTCTimeZone();
-  const std::string ymdhms = "%Y-%m-%d %H:%M:%S";
-  const int kMax = std::numeric_limits<int>::max();
-  const int kMin = std::numeric_limits<int>::min();
-  absl::Time t;
-
-  t = absl::FromDateTime(std::numeric_limits<absl::civil_year_t>::max(), kMax,
-                         kMax, kMax, kMax, kMax, utc);
-  EXPECT_EQ("infinite-future",
-            absl::FormatTime(ymdhms, t, utc));  // no overflow
-  t = absl::FromDateTime(std::numeric_limits<absl::civil_year_t>::min(), kMin,
-                         kMin, kMin, kMin, kMin, utc);
-  EXPECT_EQ("infinite-past", absl::FormatTime(ymdhms, t, utc));  // no overflow
-
-  // Check normalization.
-  EXPECT_TRUE(absl::ConvertDateTime(2013, 10, 32, 8, 30, 0, utc).normalized);
-  t = absl::FromDateTime(2015, 1, 1, 0, 0, 60, utc);
-  EXPECT_EQ("2015-01-01 00:01:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, 1, 0, 60, 0, utc);
-  EXPECT_EQ("2015-01-01 01:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, 1, 24, 0, 0, utc);
-  EXPECT_EQ("2015-01-02 00:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, 32, 0, 0, 0, utc);
-  EXPECT_EQ("2015-02-01 00:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 13, 1, 0, 0, 0, utc);
-  EXPECT_EQ("2016-01-01 00:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 13, 32, 60, 60, 60, utc);
-  EXPECT_EQ("2016-02-03 13:01:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, 1, 0, 0, -1, utc);
-  EXPECT_EQ("2014-12-31 23:59:59", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, 1, 0, -1, 0, utc);
-  EXPECT_EQ("2014-12-31 23:59:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, 1, -1, 0, 0, utc);
-  EXPECT_EQ("2014-12-31 23:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, 1, -1, 0, 0, 0, utc);
-  EXPECT_EQ("2014-12-30 00:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, -1, 1, 0, 0, 0, utc);
-  EXPECT_EQ("2014-11-01 00:00:00", absl::FormatTime(ymdhms, t, utc));
-  t = absl::FromDateTime(2015, -1, -1, -1, -1, -1, utc);
-  EXPECT_EQ("2014-10-29 22:58:59", absl::FormatTime(ymdhms, t, utc));
-}
-
-TEST(Time, NextTransitionUTC) {
-  const auto tz = absl::UTCTimeZone();
-  absl::TimeZone::CivilTransition trans;
-
-  auto t = absl::InfinitePast();
-  EXPECT_FALSE(tz.NextTransition(t, &trans));
-
-  t = absl::InfiniteFuture();
-  EXPECT_FALSE(tz.NextTransition(t, &trans));
-}
-
-TEST(Time, PrevTransitionUTC) {
-  const auto tz = absl::UTCTimeZone();
-  absl::TimeZone::CivilTransition trans;
-
-  auto t = absl::InfiniteFuture();
-  EXPECT_FALSE(tz.PrevTransition(t, &trans));
-
-  t = absl::InfinitePast();
-  EXPECT_FALSE(tz.PrevTransition(t, &trans));
-}
-
-TEST(Time, NextTransitionNYC) {
-  const auto tz = absl::time_internal::LoadTimeZone("America/New_York");
-  absl::TimeZone::CivilTransition trans;
-
-  auto t = absl::FromCivil(absl::CivilSecond(2018, 6, 30, 0, 0, 0), tz);
-  EXPECT_TRUE(tz.NextTransition(t, &trans));
-  EXPECT_EQ(absl::CivilSecond(2018, 11, 4, 2, 0, 0), trans.from);
-  EXPECT_EQ(absl::CivilSecond(2018, 11, 4, 1, 0, 0), trans.to);
-
-  t = absl::InfiniteFuture();
-  EXPECT_FALSE(tz.NextTransition(t, &trans));
-
-  t = absl::InfinitePast();
-  EXPECT_TRUE(tz.NextTransition(t, &trans));
-  if (trans.from == absl::CivilSecond(1918, 03, 31, 2, 0, 0)) {
-    // It looks like the tzdata is only 32 bit (probably macOS),
-    // which bottoms out at 1901-12-13T20:45:52+00:00.
-    EXPECT_EQ(absl::CivilSecond(1918, 3, 31, 3, 0, 0), trans.to);
-  } else {
-    EXPECT_EQ(absl::CivilSecond(1883, 11, 18, 12, 3, 58), trans.from);
-    EXPECT_EQ(absl::CivilSecond(1883, 11, 18, 12, 0, 0), trans.to);
-  }
-}
-
-TEST(Time, PrevTransitionNYC) {
-  const auto tz = absl::time_internal::LoadTimeZone("America/New_York");
-  absl::TimeZone::CivilTransition trans;
-
-  auto t = absl::FromCivil(absl::CivilSecond(2018, 6, 30, 0, 0, 0), tz);
-  EXPECT_TRUE(tz.PrevTransition(t, &trans));
-  EXPECT_EQ(absl::CivilSecond(2018, 3, 11, 2, 0, 0), trans.from);
-  EXPECT_EQ(absl::CivilSecond(2018, 3, 11, 3, 0, 0), trans.to);
-
-  t = absl::InfinitePast();
-  EXPECT_FALSE(tz.PrevTransition(t, &trans));
-
-  t = absl::InfiniteFuture();
-  EXPECT_TRUE(tz.PrevTransition(t, &trans));
-  // We have a transition but we don't know which one.
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/time/time_zone_test.cc b/third_party/abseil/absl/time/time_zone_test.cc
deleted file mode 100644
index 229fcfc..0000000
--- a/third_party/abseil/absl/time/time_zone_test.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/time/internal/cctz/include/cctz/time_zone.h"
-
-#include "gtest/gtest.h"
-#include "absl/time/internal/test_util.h"
-#include "absl/time/time.h"
-
-namespace cctz = absl::time_internal::cctz;
-
-namespace {
-
-TEST(TimeZone, ValueSemantics) {
-  absl::TimeZone tz;
-  absl::TimeZone tz2 = tz;  // Copy-construct
-  EXPECT_EQ(tz, tz2);
-  tz2 = tz;  // Copy-assign
-  EXPECT_EQ(tz, tz2);
-}
-
-TEST(TimeZone, Equality) {
-  absl::TimeZone a, b;
-  EXPECT_EQ(a, b);
-  EXPECT_EQ(a.name(), b.name());
-
-  absl::TimeZone implicit_utc;
-  absl::TimeZone explicit_utc = absl::UTCTimeZone();
-  EXPECT_EQ(implicit_utc, explicit_utc);
-  EXPECT_EQ(implicit_utc.name(), explicit_utc.name());
-
-  absl::TimeZone la = absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  absl::TimeZone nyc = absl::time_internal::LoadTimeZone("America/New_York");
-  EXPECT_NE(la, nyc);
-}
-
-TEST(TimeZone, CCTZConversion) {
-  const cctz::time_zone cz = cctz::utc_time_zone();
-  const absl::TimeZone tz(cz);
-  EXPECT_EQ(cz, cctz::time_zone(tz));
-}
-
-TEST(TimeZone, DefaultTimeZones) {
-  absl::TimeZone tz;
-  EXPECT_EQ("UTC", absl::TimeZone().name());
-  EXPECT_EQ("UTC", absl::UTCTimeZone().name());
-}
-
-TEST(TimeZone, FixedTimeZone) {
-  const absl::TimeZone tz = absl::FixedTimeZone(123);
-  const cctz::time_zone cz = cctz::fixed_time_zone(cctz::seconds(123));
-  EXPECT_EQ(tz, absl::TimeZone(cz));
-}
-
-TEST(TimeZone, LocalTimeZone) {
-  const absl::TimeZone local_tz = absl::LocalTimeZone();
-  absl::TimeZone tz = absl::time_internal::LoadTimeZone("localtime");
-  EXPECT_EQ(tz, local_tz);
-}
-
-TEST(TimeZone, NamedTimeZones) {
-  absl::TimeZone nyc = absl::time_internal::LoadTimeZone("America/New_York");
-  EXPECT_EQ("America/New_York", nyc.name());
-  absl::TimeZone syd = absl::time_internal::LoadTimeZone("Australia/Sydney");
-  EXPECT_EQ("Australia/Sydney", syd.name());
-  absl::TimeZone fixed = absl::FixedTimeZone((((3 * 60) + 25) * 60) + 45);
-  EXPECT_EQ("Fixed/UTC+03:25:45", fixed.name());
-}
-
-TEST(TimeZone, Failures) {
-  absl::TimeZone tz = absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  EXPECT_FALSE(LoadTimeZone("Invalid/TimeZone", &tz));
-  EXPECT_EQ(absl::UTCTimeZone(), tz);  // guaranteed fallback to UTC
-
-  // Ensures that the load still fails on a subsequent attempt.
-  tz = absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  EXPECT_FALSE(LoadTimeZone("Invalid/TimeZone", &tz));
-  EXPECT_EQ(absl::UTCTimeZone(), tz);  // guaranteed fallback to UTC
-
-  // Loading an empty string timezone should fail.
-  tz = absl::time_internal::LoadTimeZone("America/Los_Angeles");
-  EXPECT_FALSE(LoadTimeZone("", &tz));
-  EXPECT_EQ(absl::UTCTimeZone(), tz);  // guaranteed fallback to UTC
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/types/BUILD.bazel b/third_party/abseil/absl/types/BUILD.bazel
deleted file mode 100644
index 83be936..0000000
--- a/third_party/abseil/absl/types/BUILD.bazel
+++ /dev/null
@@ -1,336 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "any",
-    hdrs = ["any.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bad_any_cast",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:fast_type_id",
-        "//absl/meta:type_traits",
-        "//absl/utility",
-    ],
-)
-
-cc_library(
-    name = "bad_any_cast",
-    hdrs = ["bad_any_cast.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bad_any_cast_impl",
-        "//absl/base:config",
-    ],
-)
-
-cc_library(
-    name = "bad_any_cast_impl",
-    srcs = [
-        "bad_any_cast.cc",
-        "bad_any_cast.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    visibility = ["//visibility:private"],
-    deps = [
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_test(
-    name = "any_test",
-    size = "small",
-    srcs = [
-        "any_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":any",
-        "//absl/base:config",
-        "//absl/base:exception_testing",
-        "//absl/base:raw_logging_internal",
-        "//absl/container:test_instance_tracker",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "any_exception_safety_test",
-    srcs = ["any_exception_safety_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":any",
-        "//absl/base:config",
-        "//absl/base:exception_safety_testing",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "span",
-    srcs = [
-        "internal/span.h",
-    ],
-    hdrs = [
-        "span.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/algorithm",
-        "//absl/base:core_headers",
-        "//absl/base:throw_delegate",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "span_test",
-    size = "small",
-    srcs = ["span_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":span",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/base:exception_testing",
-        "//absl/container:fixed_array",
-        "//absl/container:inlined_vector",
-        "//absl/hash:hash_testing",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "optional",
-    srcs = ["internal/optional.h"],
-    hdrs = ["optional.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bad_optional_access",
-        "//absl/base:base_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/utility",
-    ],
-)
-
-cc_library(
-    name = "bad_optional_access",
-    srcs = ["bad_optional_access.cc"],
-    hdrs = ["bad_optional_access.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_library(
-    name = "bad_variant_access",
-    srcs = ["bad_variant_access.cc"],
-    hdrs = ["bad_variant_access.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-    ],
-)
-
-cc_test(
-    name = "optional_test",
-    size = "small",
-    srcs = [
-        "optional_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":optional",
-        "//absl/base:config",
-        "//absl/base:raw_logging_internal",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "optional_exception_safety_test",
-    srcs = [
-        "optional_exception_safety_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":optional",
-        "//absl/base:config",
-        "//absl/base:exception_safety_testing",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "conformance_testing",
-    testonly = 1,
-    hdrs = [
-        "internal/conformance_aliases.h",
-        "internal/conformance_archetype.h",
-        "internal/conformance_profile.h",
-        "internal/conformance_testing.h",
-        "internal/conformance_testing_helpers.h",
-        "internal/parentheses.h",
-        "internal/transform_args.h",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/algorithm:container",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "//absl/utility",
-        "@com_google_googletest//:gtest",
-    ],
-)
-
-cc_test(
-    name = "conformance_testing_test",
-    size = "small",
-    srcs = [
-        "internal/conformance_testing_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":conformance_testing",
-        "//absl/meta:type_traits",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "variant",
-    srcs = ["internal/variant.h"],
-    hdrs = ["variant.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":bad_variant_access",
-        "//absl/base:base_internal",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-        "//absl/utility",
-    ],
-)
-
-cc_test(
-    name = "variant_test",
-    size = "small",
-    srcs = ["variant_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":variant",
-        "//absl/base:config",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "//absl/meta:type_traits",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_test(
-    name = "variant_benchmark",
-    srcs = [
-        "variant_benchmark.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    tags = ["benchmark"],
-    deps = [
-        ":variant",
-        "//absl/utility",
-        "@com_github_google_benchmark//:benchmark_main",
-    ],
-)
-
-cc_test(
-    name = "variant_exception_safety_test",
-    size = "small",
-    srcs = [
-        "variant_exception_safety_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":variant",
-        "//absl/base:config",
-        "//absl/base:exception_safety_testing",
-        "//absl/memory",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
-cc_library(
-    name = "compare",
-    hdrs = ["compare.h"],
-    copts = ABSL_DEFAULT_COPTS,
-    deps = [
-        "//absl/base:core_headers",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "compare_test",
-    size = "small",
-    srcs = [
-        "compare_test.cc",
-    ],
-    copts = ABSL_TEST_COPTS,
-    deps = [
-        ":compare",
-        "//absl/base",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/types/CMakeLists.txt b/third_party/abseil/absl/types/CMakeLists.txt
deleted file mode 100644
index 3f99ad8..0000000
--- a/third_party/abseil/absl/types/CMakeLists.txt
+++ /dev/null
@@ -1,373 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-absl_cc_library(
-  NAME
-    any
-  HDRS
-    "any.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bad_any_cast
-    absl::config
-    absl::core_headers
-    absl::fast_type_id
-    absl::type_traits
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    bad_any_cast
-  HDRS
-   "bad_any_cast.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bad_any_cast_impl
-    absl::config
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    bad_any_cast_impl
-  SRCS
-   "bad_any_cast.h"
-   "bad_any_cast.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::raw_logging_internal
-)
-
-absl_cc_test(
-  NAME
-    any_test
-  SRCS
-    "any_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::any
-    absl::config
-    absl::exception_testing
-    absl::raw_logging_internal
-    absl::test_instance_tracker
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    any_test_noexceptions
-  SRCS
-    "any_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::any
-    absl::config
-    absl::exception_testing
-    absl::raw_logging_internal
-    absl::test_instance_tracker
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    any_exception_safety_test
-  SRCS
-    "any_exception_safety_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::any
-    absl::config
-    absl::exception_safety_testing
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    span
-  HDRS
-    "span.h"
-  SRCS
-    "internal/span.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::algorithm
-    absl::core_headers
-    absl::throw_delegate
-    absl::type_traits
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    span_test
-  SRCS
-    "span_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::span
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::exception_testing
-    absl::fixed_array
-    absl::inlined_vector
-    absl::hash_testing
-    absl::strings
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    span_test_noexceptions
-  SRCS
-    "span_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::span
-    absl::base
-    absl::config
-    absl::core_headers
-    absl::exception_testing
-    absl::fixed_array
-    absl::inlined_vector
-    absl::hash_testing
-    absl::strings
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    optional
-  HDRS
-    "optional.h"
-  SRCS
-    "internal/optional.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bad_optional_access
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::memory
-    absl::type_traits
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    bad_optional_access
-  HDRS
-    "bad_optional_access.h"
-  SRCS
-    "bad_optional_access.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::raw_logging_internal
-  PUBLIC
-)
-
-absl_cc_library(
-  NAME
-    bad_variant_access
-  HDRS
-    "bad_variant_access.h"
-  SRCS
-    "bad_variant_access.cc"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::config
-    absl::raw_logging_internal
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    optional_test
-  SRCS
-    "optional_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::optional
-    absl::config
-    absl::raw_logging_internal
-    absl::strings
-    absl::type_traits
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    optional_exception_safety_test
-  SRCS
-    "optional_exception_safety_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::optional
-    absl::config
-    absl::exception_safety_testing
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    conformance_testing
-  HDRS
-    "internal/conformance_aliases.h"
-    "internal/conformance_archetype.h"
-    "internal/conformance_profile.h"
-    "internal/conformance_testing.h"
-    "internal/conformance_testing_helpers.h"
-    "internal/parentheses.h"
-    "internal/transform_args.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::algorithm
-    absl::debugging
-    absl::type_traits
-    absl::strings
-    absl::utility
-    gmock_main
-  TESTONLY
-)
-
-absl_cc_test(
-  NAME
-    conformance_testing_test
-  SRCS
-    "internal/conformance_testing_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-    ${ABSL_EXCEPTIONS_FLAG}
-  LINKOPTS
-    ${ABSL_EXCEPTIONS_FLAG_LINKOPTS}
-  DEPS
-    absl::conformance_testing
-    absl::type_traits
-    gmock_main
-)
-
-absl_cc_test(
-  NAME
-    conformance_testing_test_no_exceptions
-  SRCS
-    "internal/conformance_testing_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::conformance_testing
-    absl::type_traits
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    variant
-  HDRS
-    "variant.h"
-  SRCS
-    "internal/variant.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::bad_variant_access
-    absl::base_internal
-    absl::config
-    absl::core_headers
-    absl::type_traits
-    absl::utility
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    variant_test
-  SRCS
-    "variant_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::variant
-    absl::config
-    absl::core_headers
-    absl::memory
-    absl::type_traits
-    absl::strings
-    gmock_main
-)
-
-absl_cc_library(
-  NAME
-    compare
-  HDRS
-    "compare.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::core_headers
-    absl::type_traits
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    compare_test
-  SRCS
-    "compare_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::base
-    absl::compare
-    gmock_main
-)
-
-# TODO(cohenjon,zhangxy) Figure out why this test is failing on gcc 4.8
-if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
-else()
-absl_cc_test(
-  NAME
-    variant_exception_safety_test
-  SRCS
-    "variant_exception_safety_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::variant
-    absl::config
-    absl::exception_safety_testing
-    absl::memory
-    gmock_main
-)
-endif()
diff --git a/third_party/abseil/absl/types/any.h b/third_party/abseil/absl/types/any.h
deleted file mode 100644
index fc5a074..0000000
--- a/third_party/abseil/absl/types/any.h
+++ /dev/null
@@ -1,528 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// any.h
-// -----------------------------------------------------------------------------
-//
-// This header file define the `absl::any` type for holding a type-safe value
-// of any type. The 'absl::any` type is useful for providing a way to hold
-// something that is, as yet, unspecified. Such unspecified types
-// traditionally are passed between API boundaries until they are later cast to
-// their "destination" types. To cast to such a destination type, use
-// `absl::any_cast()`. Note that when casting an `absl::any`, you must cast it
-// to an explicit type; implicit conversions will throw.
-//
-// Example:
-//
-//   auto a = absl::any(65);
-//   absl::any_cast<int>(a);         // 65
-//   absl::any_cast<char>(a);        // throws absl::bad_any_cast
-//   absl::any_cast<std::string>(a); // throws absl::bad_any_cast
-//
-// `absl::any` is a C++11 compatible version of the C++17 `std::any` abstraction
-// and is designed to be a drop-in replacement for code compliant with C++17.
-//
-// Traditionally, the behavior of casting to a temporary unspecified type has
-// been accomplished with the `void *` paradigm, where the pointer was to some
-// other unspecified type. `absl::any` provides an "owning" version of `void *`
-// that avoids issues of pointer management.
-//
-// Note: just as in the case of `void *`, use of `absl::any` (and its C++17
-// version `std::any`) is a code smell indicating that your API might not be
-// constructed correctly. We have seen that most uses of `any` are unwarranted,
-// and `absl::any`, like `std::any`, is difficult to use properly. Before using
-// this abstraction, make sure that you should not instead be rewriting your
-// code to be more specific.
-//
-// Abseil has also released an `absl::variant` type (a C++11 compatible version
-// of the C++17 `std::variant`), which is generally preferred for use over
-// `absl::any`.
-#ifndef ABSL_TYPES_ANY_H_
-#define ABSL_TYPES_ANY_H_
-
-#include "absl/base/config.h"
-#include "absl/utility/utility.h"
-
-#ifdef ABSL_USES_STD_ANY
-
-#include <any>  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using std::any;
-using std::any_cast;
-using std::bad_any_cast;
-using std::make_any;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_ANY
-
-#include <algorithm>
-#include <cstddef>
-#include <initializer_list>
-#include <memory>
-#include <stdexcept>
-#include <type_traits>
-#include <typeinfo>
-#include <utility>
-
-#include "absl/base/internal/fast_type_id.h"
-#include "absl/base/macros.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/bad_any_cast.h"
-
-// NOTE: This macro is an implementation detail that is undefined at the bottom
-// of the file. It is not intended for expansion directly from user code.
-#ifdef ABSL_ANY_DETAIL_HAS_RTTI
-#error ABSL_ANY_DETAIL_HAS_RTTI cannot be directly set
-#elif !defined(__GNUC__) || defined(__GXX_RTTI)
-#define ABSL_ANY_DETAIL_HAS_RTTI 1
-#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-class any;
-
-// swap()
-//
-// Swaps two `absl::any` values. Equivalent to `x.swap(y) where `x` and `y` are
-// `absl::any` types.
-void swap(any& x, any& y) noexcept;
-
-// make_any()
-//
-// Constructs an `absl::any` of type `T` with the given arguments.
-template <typename T, typename... Args>
-any make_any(Args&&... args);
-
-// Overload of `absl::make_any()` for constructing an `absl::any` type from an
-// initializer list.
-template <typename T, typename U, typename... Args>
-any make_any(std::initializer_list<U> il, Args&&... args);
-
-// any_cast()
-//
-// Statically casts the value of a `const absl::any` type to the given type.
-// This function will throw `absl::bad_any_cast` if the stored value type of the
-// `absl::any` does not match the cast.
-//
-// `any_cast()` can also be used to get a reference to the internal storage iff
-// a reference type is passed as its `ValueType`:
-//
-// Example:
-//
-//   absl::any my_any = std::vector<int>();
-//   absl::any_cast<std::vector<int>&>(my_any).push_back(42);
-template <typename ValueType>
-ValueType any_cast(const any& operand);
-
-// Overload of `any_cast()` to statically cast the value of a non-const
-// `absl::any` type to the given type. This function will throw
-// `absl::bad_any_cast` if the stored value type of the `absl::any` does not
-// match the cast.
-template <typename ValueType>
-ValueType any_cast(any& operand);  // NOLINT(runtime/references)
-
-// Overload of `any_cast()` to statically cast the rvalue of an `absl::any`
-// type. This function will throw `absl::bad_any_cast` if the stored value type
-// of the `absl::any` does not match the cast.
-template <typename ValueType>
-ValueType any_cast(any&& operand);
-
-// Overload of `any_cast()` to statically cast the value of a const pointer
-// `absl::any` type to the given pointer type, or `nullptr` if the stored value
-// type of the `absl::any` does not match the cast.
-template <typename ValueType>
-const ValueType* any_cast(const any* operand) noexcept;
-
-// Overload of `any_cast()` to statically cast the value of a pointer
-// `absl::any` type to the given pointer type, or `nullptr` if the stored value
-// type of the `absl::any` does not match the cast.
-template <typename ValueType>
-ValueType* any_cast(any* operand) noexcept;
-
-// -----------------------------------------------------------------------------
-// absl::any
-// -----------------------------------------------------------------------------
-//
-// An `absl::any` object provides the facility to either store an instance of a
-// type, known as the "contained object", or no value. An `absl::any` is used to
-// store values of types that are unknown at compile time. The `absl::any`
-// object, when containing a value, must contain a value type; storing a
-// reference type is neither desired nor supported.
-//
-// An `absl::any` can only store a type that is copy-constructible; move-only
-// types are not allowed within an `any` object.
-//
-// Example:
-//
-//   auto a = absl::any(65);                 // Literal, copyable
-//   auto b = absl::any(std::vector<int>()); // Default-initialized, copyable
-//   std::unique_ptr<Foo> my_foo;
-//   auto c = absl::any(std::move(my_foo));  // Error, not copy-constructible
-//
-// Note that `absl::any` makes use of decayed types (`absl::decay_t` in this
-// context) to remove const-volatile qualifiers (known as "cv qualifiers"),
-// decay functions to function pointers, etc. We essentially "decay" a given
-// type into its essential type.
-//
-// `absl::any` makes use of decayed types when determining the basic type `T` of
-// the value to store in the any's contained object. In the documentation below,
-// we explicitly denote this by using the phrase "a decayed type of `T`".
-//
-// Example:
-//
-//   const int a = 4;
-//   absl::any foo(a);  // Decay ensures we store an "int", not a "const int&".
-//
-//   void my_function() {}
-//   absl::any bar(my_function);  // Decay ensures we store a function pointer.
-//
-// `absl::any` is a C++11 compatible version of the C++17 `std::any` abstraction
-// and is designed to be a drop-in replacement for code compliant with C++17.
-class any {
- private:
-  template <typename T>
-  struct IsInPlaceType;
-
- public:
-  // Constructors
-
-  // Constructs an empty `absl::any` object (`any::has_value()` will return
-  // `false`).
-  constexpr any() noexcept;
-
-  // Copy constructs an `absl::any` object with a "contained object" of the
-  // passed type of `other` (or an empty `absl::any` if `other.has_value()` is
-  // `false`.
-  any(const any& other)
-      : obj_(other.has_value() ? other.obj_->Clone()
-                               : std::unique_ptr<ObjInterface>()) {}
-
-  // Move constructs an `absl::any` object with a "contained object" of the
-  // passed type of `other` (or an empty `absl::any` if `other.has_value()` is
-  // `false`).
-  any(any&& other) noexcept = default;
-
-  // Constructs an `absl::any` object with a "contained object" of the decayed
-  // type of `T`, which is initialized via `std::forward<T>(value)`.
-  //
-  // This constructor will not participate in overload resolution if the
-  // decayed type of `T` is not copy-constructible.
-  template <
-      typename T, typename VT = absl::decay_t<T>,
-      absl::enable_if_t<!absl::disjunction<
-          std::is_same<any, VT>, IsInPlaceType<VT>,
-          absl::negation<std::is_copy_constructible<VT> > >::value>* = nullptr>
-  any(T&& value) : obj_(new Obj<VT>(in_place, std::forward<T>(value))) {}
-
-  // Constructs an `absl::any` object with a "contained object" of the decayed
-  // type of `T`, which is initialized via `std::forward<T>(value)`.
-  template <typename T, typename... Args, typename VT = absl::decay_t<T>,
-            absl::enable_if_t<absl::conjunction<
-                std::is_copy_constructible<VT>,
-                std::is_constructible<VT, Args...>>::value>* = nullptr>
-  explicit any(in_place_type_t<T> /*tag*/, Args&&... args)
-      : obj_(new Obj<VT>(in_place, std::forward<Args>(args)...)) {}
-
-  // Constructs an `absl::any` object with a "contained object" of the passed
-  // type `VT` as a decayed type of `T`. `VT` is initialized as if
-  // direct-non-list-initializing an object of type `VT` with the arguments
-  // `initializer_list, std::forward<Args>(args)...`.
-  template <
-      typename T, typename U, typename... Args, typename VT = absl::decay_t<T>,
-      absl::enable_if_t<
-          absl::conjunction<std::is_copy_constructible<VT>,
-                            std::is_constructible<VT, std::initializer_list<U>&,
-                                                  Args...>>::value>* = nullptr>
-  explicit any(in_place_type_t<T> /*tag*/, std::initializer_list<U> ilist,
-               Args&&... args)
-      : obj_(new Obj<VT>(in_place, ilist, std::forward<Args>(args)...)) {}
-
-  // Assignment operators
-
-  // Copy assigns an `absl::any` object with a "contained object" of the
-  // passed type.
-  any& operator=(const any& rhs) {
-    any(rhs).swap(*this);
-    return *this;
-  }
-
-  // Move assigns an `absl::any` object with a "contained object" of the
-  // passed type. `rhs` is left in a valid but otherwise unspecified state.
-  any& operator=(any&& rhs) noexcept {
-    any(std::move(rhs)).swap(*this);
-    return *this;
-  }
-
-  // Assigns an `absl::any` object with a "contained object" of the passed type.
-  template <typename T, typename VT = absl::decay_t<T>,
-            absl::enable_if_t<absl::conjunction<
-                absl::negation<std::is_same<VT, any>>,
-                std::is_copy_constructible<VT>>::value>* = nullptr>
-  any& operator=(T&& rhs) {
-    any tmp(in_place_type_t<VT>(), std::forward<T>(rhs));
-    tmp.swap(*this);
-    return *this;
-  }
-
-  // Modifiers
-
-  // any::emplace()
-  //
-  // Emplaces a value within an `absl::any` object by calling `any::reset()`,
-  // initializing the contained value as if direct-non-list-initializing an
-  // object of type `VT` with the arguments `std::forward<Args>(args)...`, and
-  // returning a reference to the new contained value.
-  //
-  // Note: If an exception is thrown during the call to `VT`'s constructor,
-  // `*this` does not contain a value, and any previously contained value has
-  // been destroyed.
-  template <
-      typename T, typename... Args, typename VT = absl::decay_t<T>,
-      absl::enable_if_t<std::is_copy_constructible<VT>::value &&
-                        std::is_constructible<VT, Args...>::value>* = nullptr>
-  VT& emplace(Args&&... args) {
-    reset();  // NOTE: reset() is required here even in the world of exceptions.
-    Obj<VT>* const object_ptr =
-        new Obj<VT>(in_place, std::forward<Args>(args)...);
-    obj_ = std::unique_ptr<ObjInterface>(object_ptr);
-    return object_ptr->value;
-  }
-
-  // Overload of `any::emplace()` to emplace a value within an `absl::any`
-  // object by calling `any::reset()`, initializing the contained value as if
-  // direct-non-list-initializing an object of type `VT` with the arguments
-  // `initializer_list, std::forward<Args>(args)...`, and returning a reference
-  // to the new contained value.
-  //
-  // Note: If an exception is thrown during the call to `VT`'s constructor,
-  // `*this` does not contain a value, and any previously contained value has
-  // been destroyed. The function shall not participate in overload resolution
-  // unless `is_copy_constructible_v<VT>` is `true` and
-  // `is_constructible_v<VT, initializer_list<U>&, Args...>` is `true`.
-  template <
-      typename T, typename U, typename... Args, typename VT = absl::decay_t<T>,
-      absl::enable_if_t<std::is_copy_constructible<VT>::value &&
-                        std::is_constructible<VT, std::initializer_list<U>&,
-                                              Args...>::value>* = nullptr>
-  VT& emplace(std::initializer_list<U> ilist, Args&&... args) {
-    reset();  // NOTE: reset() is required here even in the world of exceptions.
-    Obj<VT>* const object_ptr =
-        new Obj<VT>(in_place, ilist, std::forward<Args>(args)...);
-    obj_ = std::unique_ptr<ObjInterface>(object_ptr);
-    return object_ptr->value;
-  }
-
-  // any::reset()
-  //
-  // Resets the state of the `absl::any` object, destroying the contained object
-  // if present.
-  void reset() noexcept { obj_ = nullptr; }
-
-  // any::swap()
-  //
-  // Swaps the passed value and the value of this `absl::any` object.
-  void swap(any& other) noexcept { obj_.swap(other.obj_); }
-
-  // Observers
-
-  // any::has_value()
-  //
-  // Returns `true` if the `any` object has a contained value, otherwise
-  // returns `false`.
-  bool has_value() const noexcept { return obj_ != nullptr; }
-
-#if ABSL_ANY_DETAIL_HAS_RTTI
-  // Returns: typeid(T) if *this has a contained object of type T, otherwise
-  // typeid(void).
-  const std::type_info& type() const noexcept {
-    if (has_value()) {
-      return obj_->Type();
-    }
-
-    return typeid(void);
-  }
-#endif  // ABSL_ANY_DETAIL_HAS_RTTI
-
- private:
-  // Tagged type-erased abstraction for holding a cloneable object.
-  class ObjInterface {
-   public:
-    virtual ~ObjInterface() = default;
-    virtual std::unique_ptr<ObjInterface> Clone() const = 0;
-    virtual const void* ObjTypeId() const noexcept = 0;
-#if ABSL_ANY_DETAIL_HAS_RTTI
-    virtual const std::type_info& Type() const noexcept = 0;
-#endif  // ABSL_ANY_DETAIL_HAS_RTTI
-  };
-
-  // Hold a value of some queryable type, with an ability to Clone it.
-  template <typename T>
-  class Obj : public ObjInterface {
-   public:
-    template <typename... Args>
-    explicit Obj(in_place_t /*tag*/, Args&&... args)
-        : value(std::forward<Args>(args)...) {}
-
-    std::unique_ptr<ObjInterface> Clone() const final {
-      return std::unique_ptr<ObjInterface>(new Obj(in_place, value));
-    }
-
-    const void* ObjTypeId() const noexcept final { return IdForType<T>(); }
-
-#if ABSL_ANY_DETAIL_HAS_RTTI
-    const std::type_info& Type() const noexcept final { return typeid(T); }
-#endif  // ABSL_ANY_DETAIL_HAS_RTTI
-
-    T value;
-  };
-
-  std::unique_ptr<ObjInterface> CloneObj() const {
-    if (!obj_) return nullptr;
-    return obj_->Clone();
-  }
-
-  template <typename T>
-  constexpr static const void* IdForType() {
-    // Note: This type dance is to make the behavior consistent with typeid.
-    using NormalizedType =
-        typename std::remove_cv<typename std::remove_reference<T>::type>::type;
-
-    return base_internal::FastTypeId<NormalizedType>();
-  }
-
-  const void* GetObjTypeId() const {
-    return obj_ ? obj_->ObjTypeId() : base_internal::FastTypeId<void>();
-  }
-
-  // `absl::any` nonmember functions //
-
-  // Description at the declaration site (top of file).
-  template <typename ValueType>
-  friend ValueType any_cast(const any& operand);
-
-  // Description at the declaration site (top of file).
-  template <typename ValueType>
-  friend ValueType any_cast(any& operand);  // NOLINT(runtime/references)
-
-  // Description at the declaration site (top of file).
-  template <typename T>
-  friend const T* any_cast(const any* operand) noexcept;
-
-  // Description at the declaration site (top of file).
-  template <typename T>
-  friend T* any_cast(any* operand) noexcept;
-
-  std::unique_ptr<ObjInterface> obj_;
-};
-
-// -----------------------------------------------------------------------------
-// Implementation Details
-// -----------------------------------------------------------------------------
-
-constexpr any::any() noexcept = default;
-
-template <typename T>
-struct any::IsInPlaceType : std::false_type {};
-
-template <typename T>
-struct any::IsInPlaceType<in_place_type_t<T>> : std::true_type {};
-
-inline void swap(any& x, any& y) noexcept { x.swap(y); }
-
-// Description at the declaration site (top of file).
-template <typename T, typename... Args>
-any make_any(Args&&... args) {
-  return any(in_place_type_t<T>(), std::forward<Args>(args)...);
-}
-
-// Description at the declaration site (top of file).
-template <typename T, typename U, typename... Args>
-any make_any(std::initializer_list<U> il, Args&&... args) {
-  return any(in_place_type_t<T>(), il, std::forward<Args>(args)...);
-}
-
-// Description at the declaration site (top of file).
-template <typename ValueType>
-ValueType any_cast(const any& operand) {
-  using U = typename std::remove_cv<
-      typename std::remove_reference<ValueType>::type>::type;
-  static_assert(std::is_constructible<ValueType, const U&>::value,
-                "Invalid ValueType");
-  auto* const result = (any_cast<U>)(&operand);
-  if (result == nullptr) {
-    any_internal::ThrowBadAnyCast();
-  }
-  return static_cast<ValueType>(*result);
-}
-
-// Description at the declaration site (top of file).
-template <typename ValueType>
-ValueType any_cast(any& operand) {  // NOLINT(runtime/references)
-  using U = typename std::remove_cv<
-      typename std::remove_reference<ValueType>::type>::type;
-  static_assert(std::is_constructible<ValueType, U&>::value,
-                "Invalid ValueType");
-  auto* result = (any_cast<U>)(&operand);
-  if (result == nullptr) {
-    any_internal::ThrowBadAnyCast();
-  }
-  return static_cast<ValueType>(*result);
-}
-
-// Description at the declaration site (top of file).
-template <typename ValueType>
-ValueType any_cast(any&& operand) {
-  using U = typename std::remove_cv<
-      typename std::remove_reference<ValueType>::type>::type;
-  static_assert(std::is_constructible<ValueType, U>::value,
-                "Invalid ValueType");
-  return static_cast<ValueType>(std::move((any_cast<U&>)(operand)));
-}
-
-// Description at the declaration site (top of file).
-template <typename T>
-const T* any_cast(const any* operand) noexcept {
-  using U =
-      typename std::remove_cv<typename std::remove_reference<T>::type>::type;
-  return operand && operand->GetObjTypeId() == any::IdForType<U>()
-             ? std::addressof(
-                   static_cast<const any::Obj<U>*>(operand->obj_.get())->value)
-             : nullptr;
-}
-
-// Description at the declaration site (top of file).
-template <typename T>
-T* any_cast(any* operand) noexcept {
-  using U =
-      typename std::remove_cv<typename std::remove_reference<T>::type>::type;
-  return operand && operand->GetObjTypeId() == any::IdForType<U>()
-             ? std::addressof(
-                   static_cast<any::Obj<U>*>(operand->obj_.get())->value)
-             : nullptr;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef ABSL_ANY_DETAIL_HAS_RTTI
-
-#endif  // ABSL_USES_STD_ANY
-
-#endif  // ABSL_TYPES_ANY_H_
diff --git a/third_party/abseil/absl/types/any_exception_safety_test.cc b/third_party/abseil/absl/types/any_exception_safety_test.cc
deleted file mode 100644
index 31c1140..0000000
--- a/third_party/abseil/absl/types/any_exception_safety_test.cc
+++ /dev/null
@@ -1,173 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/any.h"
-
-#include "absl/base/config.h"
-
-// This test is a no-op when absl::any is an alias for std::any and when
-// exceptions are not enabled.
-#if !defined(ABSL_USES_STD_ANY) && defined(ABSL_HAVE_EXCEPTIONS)
-
-#include <typeinfo>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/exception_safety_testing.h"
-
-using Thrower = testing::ThrowingValue<>;
-using NoThrowMoveThrower =
-    testing::ThrowingValue<testing::TypeSpec::kNoThrowMove>;
-using ThrowerList = std::initializer_list<Thrower>;
-using ThrowerVec = std::vector<Thrower>;
-using ThrowingAlloc = testing::ThrowingAllocator<Thrower>;
-using ThrowingThrowerVec = std::vector<Thrower, ThrowingAlloc>;
-
-namespace {
-
-testing::AssertionResult AnyInvariants(absl::any* a) {
-  using testing::AssertionFailure;
-  using testing::AssertionSuccess;
-
-  if (a->has_value()) {
-    if (a->type() == typeid(void)) {
-      return AssertionFailure()
-             << "A non-empty any should not have type `void`";
-    }
-  } else {
-    if (a->type() != typeid(void)) {
-      return AssertionFailure()
-             << "An empty any should have type void, but has type "
-             << a->type().name();
-    }
-  }
-
-  //  Make sure that reset() changes any to a valid state.
-  a->reset();
-  if (a->has_value()) {
-    return AssertionFailure() << "A reset `any` should be valueless";
-  }
-  if (a->type() != typeid(void)) {
-    return AssertionFailure() << "A reset `any` should have type() of `void`, "
-                                 "but instead has type "
-                              << a->type().name();
-  }
-  try {
-    auto unused = absl::any_cast<Thrower>(*a);
-    static_cast<void>(unused);
-    return AssertionFailure()
-           << "A reset `any` should not be able to be any_cast";
-  } catch (const absl::bad_any_cast&) {
-  } catch (...) {
-    return AssertionFailure()
-           << "Unexpected exception thrown from absl::any_cast";
-  }
-  return AssertionSuccess();
-}
-
-testing::AssertionResult AnyIsEmpty(absl::any* a) {
-  if (!a->has_value()) {
-    return testing::AssertionSuccess();
-  }
-  return testing::AssertionFailure()
-         << "a should be empty, but instead has value "
-         << absl::any_cast<Thrower>(*a).Get();
-}
-
-TEST(AnyExceptionSafety, Ctors) {
-  Thrower val(1);
-  testing::TestThrowingCtor<absl::any>(val);
-
-  Thrower copy(val);
-  testing::TestThrowingCtor<absl::any>(copy);
-
-  testing::TestThrowingCtor<absl::any>(absl::in_place_type_t<Thrower>(), 1);
-
-  testing::TestThrowingCtor<absl::any>(absl::in_place_type_t<ThrowerVec>(),
-                                       ThrowerList{val});
-
-  testing::TestThrowingCtor<absl::any,
-                            absl::in_place_type_t<ThrowingThrowerVec>,
-                            ThrowerList, ThrowingAlloc>(
-      absl::in_place_type_t<ThrowingThrowerVec>(), {val}, ThrowingAlloc());
-}
-
-TEST(AnyExceptionSafety, Assignment) {
-  auto original =
-      absl::any(absl::in_place_type_t<Thrower>(), 1, testing::nothrow_ctor);
-  auto any_is_strong = [original](absl::any* ap) {
-    return testing::AssertionResult(ap->has_value() &&
-                                    absl::any_cast<Thrower>(original) ==
-                                        absl::any_cast<Thrower>(*ap));
-  };
-  auto any_strong_tester = testing::MakeExceptionSafetyTester()
-                               .WithInitialValue(original)
-                               .WithContracts(AnyInvariants, any_is_strong);
-
-  Thrower val(2);
-  absl::any any_val(val);
-  NoThrowMoveThrower mv_val(2);
-
-  auto assign_any = [&any_val](absl::any* ap) { *ap = any_val; };
-  auto assign_val = [&val](absl::any* ap) { *ap = val; };
-  auto move = [&val](absl::any* ap) { *ap = std::move(val); };
-  auto move_movable = [&mv_val](absl::any* ap) { *ap = std::move(mv_val); };
-
-  EXPECT_TRUE(any_strong_tester.Test(assign_any));
-  EXPECT_TRUE(any_strong_tester.Test(assign_val));
-  EXPECT_TRUE(any_strong_tester.Test(move));
-  EXPECT_TRUE(any_strong_tester.Test(move_movable));
-
-  auto empty_any_is_strong = [](absl::any* ap) {
-    return testing::AssertionResult{!ap->has_value()};
-  };
-  auto strong_empty_any_tester =
-      testing::MakeExceptionSafetyTester()
-          .WithInitialValue(absl::any{})
-          .WithContracts(AnyInvariants, empty_any_is_strong);
-
-  EXPECT_TRUE(strong_empty_any_tester.Test(assign_any));
-  EXPECT_TRUE(strong_empty_any_tester.Test(assign_val));
-  EXPECT_TRUE(strong_empty_any_tester.Test(move));
-}
-
-TEST(AnyExceptionSafety, Emplace) {
-  auto initial_val =
-      absl::any{absl::in_place_type_t<Thrower>(), 1, testing::nothrow_ctor};
-  auto one_tester = testing::MakeExceptionSafetyTester()
-                        .WithInitialValue(initial_val)
-                        .WithContracts(AnyInvariants, AnyIsEmpty);
-
-  auto emp_thrower = [](absl::any* ap) { ap->emplace<Thrower>(2); };
-  auto emp_throwervec = [](absl::any* ap) {
-    std::initializer_list<Thrower> il{Thrower(2, testing::nothrow_ctor)};
-    ap->emplace<ThrowerVec>(il);
-  };
-  auto emp_movethrower = [](absl::any* ap) {
-    ap->emplace<NoThrowMoveThrower>(2);
-  };
-
-  EXPECT_TRUE(one_tester.Test(emp_thrower));
-  EXPECT_TRUE(one_tester.Test(emp_throwervec));
-  EXPECT_TRUE(one_tester.Test(emp_movethrower));
-
-  auto empty_tester = one_tester.WithInitialValue(absl::any{});
-
-  EXPECT_TRUE(empty_tester.Test(emp_thrower));
-  EXPECT_TRUE(empty_tester.Test(emp_throwervec));
-}
-
-}  // namespace
-
-#endif  // #if !defined(ABSL_USES_STD_ANY) && defined(ABSL_HAVE_EXCEPTIONS)
diff --git a/third_party/abseil/absl/types/any_test.cc b/third_party/abseil/absl/types/any_test.cc
deleted file mode 100644
index 70e4ba2..0000000
--- a/third_party/abseil/absl/types/any_test.cc
+++ /dev/null
@@ -1,781 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/any.h"
-
-// This test is a no-op when absl::any is an alias for std::any.
-#if !defined(ABSL_USES_STD_ANY)
-
-#include <initializer_list>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/exception_testing.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/container/internal/test_instance_tracker.h"
-
-namespace {
-using absl::test_internal::CopyableOnlyInstance;
-using absl::test_internal::InstanceTracker;
-
-template <typename T>
-const T& AsConst(const T& t) {
-  return t;
-}
-
-struct MoveOnly {
-  MoveOnly() = default;
-  explicit MoveOnly(int value) : value(value) {}
-  MoveOnly(MoveOnly&&) = default;
-  MoveOnly& operator=(MoveOnly&&) = default;
-
-  int value = 0;
-};
-
-struct CopyOnly {
-  CopyOnly() = default;
-  explicit CopyOnly(int value) : value(value) {}
-  CopyOnly(CopyOnly&&) = delete;
-  CopyOnly& operator=(CopyOnly&&) = delete;
-  CopyOnly(const CopyOnly&) = default;
-  CopyOnly& operator=(const CopyOnly&) = default;
-
-  int value = 0;
-};
-
-struct MoveOnlyWithListConstructor {
-  MoveOnlyWithListConstructor() = default;
-  explicit MoveOnlyWithListConstructor(std::initializer_list<int> /*ilist*/,
-                                       int value)
-      : value(value) {}
-  MoveOnlyWithListConstructor(MoveOnlyWithListConstructor&&) = default;
-  MoveOnlyWithListConstructor& operator=(MoveOnlyWithListConstructor&&) =
-      default;
-
-  int value = 0;
-};
-
-struct IntMoveOnlyCopyOnly {
-  IntMoveOnlyCopyOnly(int value, MoveOnly /*move_only*/, CopyOnly /*copy_only*/)
-      : value(value) {}
-
-  int value;
-};
-
-struct ListMoveOnlyCopyOnly {
-  ListMoveOnlyCopyOnly(std::initializer_list<int> ilist, MoveOnly /*move_only*/,
-                       CopyOnly /*copy_only*/)
-      : values(ilist) {}
-
-  std::vector<int> values;
-};
-
-using FunctionType = void();
-void FunctionToEmplace() {}
-
-using ArrayType = int[2];
-using DecayedArray = absl::decay_t<ArrayType>;
-
-TEST(AnyTest, Noexcept) {
-  static_assert(std::is_nothrow_default_constructible<absl::any>(), "");
-  static_assert(std::is_nothrow_move_constructible<absl::any>(), "");
-  static_assert(std::is_nothrow_move_assignable<absl::any>(), "");
-  static_assert(noexcept(std::declval<absl::any&>().has_value()), "");
-  static_assert(noexcept(std::declval<absl::any&>().type()), "");
-  static_assert(noexcept(absl::any_cast<int>(std::declval<absl::any*>())), "");
-  static_assert(
-      noexcept(std::declval<absl::any&>().swap(std::declval<absl::any&>())),
-      "");
-
-  using std::swap;
-  static_assert(
-      noexcept(swap(std::declval<absl::any&>(), std::declval<absl::any&>())),
-      "");
-}
-
-TEST(AnyTest, HasValue) {
-  absl::any o;
-  EXPECT_FALSE(o.has_value());
-  o.emplace<int>();
-  EXPECT_TRUE(o.has_value());
-  o.reset();
-  EXPECT_FALSE(o.has_value());
-}
-
-TEST(AnyTest, Type) {
-  absl::any o;
-  EXPECT_EQ(typeid(void), o.type());
-  o.emplace<int>(5);
-  EXPECT_EQ(typeid(int), o.type());
-  o.emplace<float>(5.f);
-  EXPECT_EQ(typeid(float), o.type());
-  o.reset();
-  EXPECT_EQ(typeid(void), o.type());
-}
-
-TEST(AnyTest, EmptyPointerCast) {
-  // pointer-to-unqualified overload
-  {
-    absl::any o;
-    EXPECT_EQ(nullptr, absl::any_cast<int>(&o));
-    o.emplace<int>();
-    EXPECT_NE(nullptr, absl::any_cast<int>(&o));
-    o.reset();
-    EXPECT_EQ(nullptr, absl::any_cast<int>(&o));
-  }
-
-  // pointer-to-const overload
-  {
-    absl::any o;
-    EXPECT_EQ(nullptr, absl::any_cast<int>(&AsConst(o)));
-    o.emplace<int>();
-    EXPECT_NE(nullptr, absl::any_cast<int>(&AsConst(o)));
-    o.reset();
-    EXPECT_EQ(nullptr, absl::any_cast<int>(&AsConst(o)));
-  }
-}
-
-TEST(AnyTest, InPlaceConstruction) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type_t<IntMoveOnlyCopyOnly>(), 5, MoveOnly(),
-              copy_only);
-  IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(5, v.value);
-}
-
-TEST(AnyTest, InPlaceConstructionVariableTemplate) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type<IntMoveOnlyCopyOnly>, 5, MoveOnly(),
-              copy_only);
-  auto& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(5, v.value);
-}
-
-TEST(AnyTest, InPlaceConstructionWithCV) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type_t<const volatile IntMoveOnlyCopyOnly>(), 5,
-              MoveOnly(), copy_only);
-  IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(5, v.value);
-}
-
-TEST(AnyTest, InPlaceConstructionWithCVVariableTemplate) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type<const volatile IntMoveOnlyCopyOnly>, 5,
-              MoveOnly(), copy_only);
-  auto& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(5, v.value);
-}
-
-TEST(AnyTest, InPlaceConstructionWithFunction) {
-  absl::any o(absl::in_place_type_t<FunctionType>(), FunctionToEmplace);
-  FunctionType*& construction_result = absl::any_cast<FunctionType*&>(o);
-  EXPECT_EQ(&FunctionToEmplace, construction_result);
-}
-
-TEST(AnyTest, InPlaceConstructionWithFunctionVariableTemplate) {
-  absl::any o(absl::in_place_type<FunctionType>, FunctionToEmplace);
-  auto& construction_result = absl::any_cast<FunctionType*&>(o);
-  EXPECT_EQ(&FunctionToEmplace, construction_result);
-}
-
-TEST(AnyTest, InPlaceConstructionWithArray) {
-  ArrayType ar = {5, 42};
-  absl::any o(absl::in_place_type_t<ArrayType>(), ar);
-  DecayedArray& construction_result = absl::any_cast<DecayedArray&>(o);
-  EXPECT_EQ(&ar[0], construction_result);
-}
-
-TEST(AnyTest, InPlaceConstructionWithArrayVariableTemplate) {
-  ArrayType ar = {5, 42};
-  absl::any o(absl::in_place_type<ArrayType>, ar);
-  auto& construction_result = absl::any_cast<DecayedArray&>(o);
-  EXPECT_EQ(&ar[0], construction_result);
-}
-
-TEST(AnyTest, InPlaceConstructionIlist) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type_t<ListMoveOnlyCopyOnly>(), {1, 2, 3, 4},
-              MoveOnly(), copy_only);
-  ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  std::vector<int> expected_values = {1, 2, 3, 4};
-  EXPECT_EQ(expected_values, v.values);
-}
-
-TEST(AnyTest, InPlaceConstructionIlistVariableTemplate) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type<ListMoveOnlyCopyOnly>, {1, 2, 3, 4},
-              MoveOnly(), copy_only);
-  auto& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  std::vector<int> expected_values = {1, 2, 3, 4};
-  EXPECT_EQ(expected_values, v.values);
-}
-
-TEST(AnyTest, InPlaceConstructionIlistWithCV) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type_t<const volatile ListMoveOnlyCopyOnly>(),
-              {1, 2, 3, 4}, MoveOnly(), copy_only);
-  ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  std::vector<int> expected_values = {1, 2, 3, 4};
-  EXPECT_EQ(expected_values, v.values);
-}
-
-TEST(AnyTest, InPlaceConstructionIlistWithCVVariableTemplate) {
-  const CopyOnly copy_only{};
-  absl::any o(absl::in_place_type<const volatile ListMoveOnlyCopyOnly>,
-              {1, 2, 3, 4}, MoveOnly(), copy_only);
-  auto& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  std::vector<int> expected_values = {1, 2, 3, 4};
-  EXPECT_EQ(expected_values, v.values);
-}
-
-TEST(AnyTest, InPlaceNoArgs) {
-  absl::any o(absl::in_place_type_t<int>{});
-  EXPECT_EQ(0, absl::any_cast<int&>(o));
-}
-
-TEST(AnyTest, InPlaceNoArgsVariableTemplate) {
-  absl::any o(absl::in_place_type<int>);
-  EXPECT_EQ(0, absl::any_cast<int&>(o));
-}
-
-template <typename Enabler, typename T, typename... Args>
-struct CanEmplaceAnyImpl : std::false_type {};
-
-template <typename T, typename... Args>
-struct CanEmplaceAnyImpl<
-    absl::void_t<decltype(
-        std::declval<absl::any&>().emplace<T>(std::declval<Args>()...))>,
-    T, Args...> : std::true_type {};
-
-template <typename T, typename... Args>
-using CanEmplaceAny = CanEmplaceAnyImpl<void, T, Args...>;
-
-TEST(AnyTest, Emplace) {
-  const CopyOnly copy_only{};
-  absl::any o;
-  EXPECT_TRUE((std::is_same<decltype(o.emplace<IntMoveOnlyCopyOnly>(
-                                5, MoveOnly(), copy_only)),
-                            IntMoveOnlyCopyOnly&>::value));
-  IntMoveOnlyCopyOnly& emplace_result =
-      o.emplace<IntMoveOnlyCopyOnly>(5, MoveOnly(), copy_only);
-  EXPECT_EQ(5, emplace_result.value);
-  IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(5, v.value);
-  EXPECT_EQ(&emplace_result, &v);
-
-  static_assert(!CanEmplaceAny<int, int, int>::value, "");
-  static_assert(!CanEmplaceAny<MoveOnly, MoveOnly>::value, "");
-}
-
-TEST(AnyTest, EmplaceWithCV) {
-  const CopyOnly copy_only{};
-  absl::any o;
-  EXPECT_TRUE(
-      (std::is_same<decltype(o.emplace<const volatile IntMoveOnlyCopyOnly>(
-                        5, MoveOnly(), copy_only)),
-                    IntMoveOnlyCopyOnly&>::value));
-  IntMoveOnlyCopyOnly& emplace_result =
-      o.emplace<const volatile IntMoveOnlyCopyOnly>(5, MoveOnly(), copy_only);
-  EXPECT_EQ(5, emplace_result.value);
-  IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(5, v.value);
-  EXPECT_EQ(&emplace_result, &v);
-}
-
-TEST(AnyTest, EmplaceWithFunction) {
-  absl::any o;
-  EXPECT_TRUE(
-      (std::is_same<decltype(o.emplace<FunctionType>(FunctionToEmplace)),
-                    FunctionType*&>::value));
-  FunctionType*& emplace_result = o.emplace<FunctionType>(FunctionToEmplace);
-  EXPECT_EQ(&FunctionToEmplace, emplace_result);
-}
-
-TEST(AnyTest, EmplaceWithArray) {
-  absl::any o;
-  ArrayType ar = {5, 42};
-  EXPECT_TRUE(
-      (std::is_same<decltype(o.emplace<ArrayType>(ar)), DecayedArray&>::value));
-  DecayedArray& emplace_result = o.emplace<ArrayType>(ar);
-  EXPECT_EQ(&ar[0], emplace_result);
-}
-
-TEST(AnyTest, EmplaceIlist) {
-  const CopyOnly copy_only{};
-  absl::any o;
-  EXPECT_TRUE((std::is_same<decltype(o.emplace<ListMoveOnlyCopyOnly>(
-                                {1, 2, 3, 4}, MoveOnly(), copy_only)),
-                            ListMoveOnlyCopyOnly&>::value));
-  ListMoveOnlyCopyOnly& emplace_result =
-      o.emplace<ListMoveOnlyCopyOnly>({1, 2, 3, 4}, MoveOnly(), copy_only);
-  ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(&v, &emplace_result);
-  std::vector<int> expected_values = {1, 2, 3, 4};
-  EXPECT_EQ(expected_values, v.values);
-
-  static_assert(!CanEmplaceAny<int, std::initializer_list<int>>::value, "");
-  static_assert(!CanEmplaceAny<MoveOnlyWithListConstructor,
-                               std::initializer_list<int>, int>::value,
-                "");
-}
-
-TEST(AnyTest, EmplaceIlistWithCV) {
-  const CopyOnly copy_only{};
-  absl::any o;
-  EXPECT_TRUE(
-      (std::is_same<decltype(o.emplace<const volatile ListMoveOnlyCopyOnly>(
-                        {1, 2, 3, 4}, MoveOnly(), copy_only)),
-                    ListMoveOnlyCopyOnly&>::value));
-  ListMoveOnlyCopyOnly& emplace_result =
-      o.emplace<const volatile ListMoveOnlyCopyOnly>({1, 2, 3, 4}, MoveOnly(),
-                                                     copy_only);
-  ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  EXPECT_EQ(&v, &emplace_result);
-  std::vector<int> expected_values = {1, 2, 3, 4};
-  EXPECT_EQ(expected_values, v.values);
-}
-
-TEST(AnyTest, EmplaceNoArgs) {
-  absl::any o;
-  o.emplace<int>();
-  EXPECT_EQ(0, absl::any_cast<int>(o));
-}
-
-TEST(AnyTest, ConversionConstruction) {
-  {
-    absl::any o = 5;
-    EXPECT_EQ(5, absl::any_cast<int>(o));
-  }
-
-  {
-    const CopyOnly copy_only(5);
-    absl::any o = copy_only;
-    EXPECT_EQ(5, absl::any_cast<CopyOnly&>(o).value);
-  }
-
-  static_assert(!std::is_convertible<MoveOnly, absl::any>::value, "");
-}
-
-TEST(AnyTest, ConversionAssignment) {
-  {
-    absl::any o;
-    o = 5;
-    EXPECT_EQ(5, absl::any_cast<int>(o));
-  }
-
-  {
-    const CopyOnly copy_only(5);
-    absl::any o;
-    o = copy_only;
-    EXPECT_EQ(5, absl::any_cast<CopyOnly&>(o).value);
-  }
-
-  static_assert(!std::is_assignable<MoveOnly, absl::any>::value, "");
-}
-
-// Suppress MSVC warnings.
-// 4521: multiple copy constructors specified
-// We wrote multiple of them to test that the correct overloads are selected.
-#ifdef _MSC_VER
-#pragma warning( push )
-#pragma warning( disable : 4521)
-#endif
-
-// Weird type for testing, only used to make sure we "properly" perfect-forward
-// when being placed into an absl::any (use the l-value constructor if given an
-// l-value rather than use the copy constructor).
-struct WeirdConstructor42 {
-  explicit WeirdConstructor42(int value) : value(value) {}
-
-  // Copy-constructor
-  WeirdConstructor42(const WeirdConstructor42& other) : value(other.value) {}
-
-  // L-value "weird" constructor (used when given an l-value)
-  WeirdConstructor42(
-      WeirdConstructor42& /*other*/)  // NOLINT(runtime/references)
-      : value(42) {}
-
-  int value;
-};
-#ifdef _MSC_VER
-#pragma warning( pop )
-#endif
-
-TEST(AnyTest, WeirdConversionConstruction) {
-  {
-    const WeirdConstructor42 source(5);
-    absl::any o = source;  // Actual copy
-    EXPECT_EQ(5, absl::any_cast<WeirdConstructor42&>(o).value);
-  }
-
-  {
-    WeirdConstructor42 source(5);
-    absl::any o = source;  // Weird "conversion"
-    EXPECT_EQ(42, absl::any_cast<WeirdConstructor42&>(o).value);
-  }
-}
-
-TEST(AnyTest, WeirdConversionAssignment) {
-  {
-    const WeirdConstructor42 source(5);
-    absl::any o;
-    o = source;  // Actual copy
-    EXPECT_EQ(5, absl::any_cast<WeirdConstructor42&>(o).value);
-  }
-
-  {
-    WeirdConstructor42 source(5);
-    absl::any o;
-    o = source;  // Weird "conversion"
-    EXPECT_EQ(42, absl::any_cast<WeirdConstructor42&>(o).value);
-  }
-}
-
-struct Value {};
-
-TEST(AnyTest, AnyCastValue) {
-  {
-    absl::any o;
-    o.emplace<int>(5);
-    EXPECT_EQ(5, absl::any_cast<int>(o));
-    EXPECT_EQ(5, absl::any_cast<int>(AsConst(o)));
-    static_assert(
-        std::is_same<decltype(absl::any_cast<Value>(o)), Value>::value, "");
-  }
-
-  {
-    absl::any o;
-    o.emplace<int>(5);
-    EXPECT_EQ(5, absl::any_cast<const int>(o));
-    EXPECT_EQ(5, absl::any_cast<const int>(AsConst(o)));
-    static_assert(std::is_same<decltype(absl::any_cast<const Value>(o)),
-                               const Value>::value,
-                  "");
-  }
-}
-
-TEST(AnyTest, AnyCastReference) {
-  {
-    absl::any o;
-    o.emplace<int>(5);
-    EXPECT_EQ(5, absl::any_cast<int&>(o));
-    EXPECT_EQ(5, absl::any_cast<const int&>(AsConst(o)));
-    static_assert(
-        std::is_same<decltype(absl::any_cast<Value&>(o)), Value&>::value, "");
-  }
-
-  {
-    absl::any o;
-    o.emplace<int>(5);
-    EXPECT_EQ(5, absl::any_cast<const int>(o));
-    EXPECT_EQ(5, absl::any_cast<const int>(AsConst(o)));
-    static_assert(std::is_same<decltype(absl::any_cast<const Value&>(o)),
-                               const Value&>::value,
-                  "");
-  }
-
-  {
-    absl::any o;
-    o.emplace<int>(5);
-    EXPECT_EQ(5, absl::any_cast<int&&>(std::move(o)));
-    static_assert(std::is_same<decltype(absl::any_cast<Value&&>(std::move(o))),
-                               Value&&>::value,
-                  "");
-  }
-
-  {
-    absl::any o;
-    o.emplace<int>(5);
-    EXPECT_EQ(5, absl::any_cast<const int>(std::move(o)));
-    static_assert(
-        std::is_same<decltype(absl::any_cast<const Value&&>(std::move(o))),
-                     const Value&&>::value,
-        "");
-  }
-}
-
-TEST(AnyTest, AnyCastPointer) {
-  {
-    absl::any o;
-    EXPECT_EQ(nullptr, absl::any_cast<char>(&o));
-    o.emplace<int>(5);
-    EXPECT_EQ(nullptr, absl::any_cast<char>(&o));
-    o.emplace<char>('a');
-    EXPECT_EQ('a', *absl::any_cast<char>(&o));
-    static_assert(
-        std::is_same<decltype(absl::any_cast<Value>(&o)), Value*>::value, "");
-  }
-
-  {
-    absl::any o;
-    EXPECT_EQ(nullptr, absl::any_cast<const char>(&o));
-    o.emplace<int>(5);
-    EXPECT_EQ(nullptr, absl::any_cast<const char>(&o));
-    o.emplace<char>('a');
-    EXPECT_EQ('a', *absl::any_cast<const char>(&o));
-    static_assert(std::is_same<decltype(absl::any_cast<const Value>(&o)),
-                               const Value*>::value,
-                  "");
-  }
-}
-
-TEST(AnyTest, MakeAny) {
-  const CopyOnly copy_only{};
-  auto o = absl::make_any<IntMoveOnlyCopyOnly>(5, MoveOnly(), copy_only);
-  static_assert(std::is_same<decltype(o), absl::any>::value, "");
-  EXPECT_EQ(5, absl::any_cast<IntMoveOnlyCopyOnly&>(o).value);
-}
-
-TEST(AnyTest, MakeAnyIList) {
-  const CopyOnly copy_only{};
-  auto o =
-      absl::make_any<ListMoveOnlyCopyOnly>({1, 2, 3}, MoveOnly(), copy_only);
-  static_assert(std::is_same<decltype(o), absl::any>::value, "");
-  ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o);
-  std::vector<int> expected_values = {1, 2, 3};
-  EXPECT_EQ(expected_values, v.values);
-}
-
-// Test the use of copy constructor and operator=
-TEST(AnyTest, Copy) {
-  InstanceTracker tracker_raii;
-
-  {
-    absl::any o(absl::in_place_type<CopyableOnlyInstance>, 123);
-    CopyableOnlyInstance* f1 = absl::any_cast<CopyableOnlyInstance>(&o);
-
-    absl::any o2(o);
-    const CopyableOnlyInstance* f2 = absl::any_cast<CopyableOnlyInstance>(&o2);
-    EXPECT_EQ(123, f2->value());
-    EXPECT_NE(f1, f2);
-
-    absl::any o3;
-    o3 = o2;
-    const CopyableOnlyInstance* f3 = absl::any_cast<CopyableOnlyInstance>(&o3);
-    EXPECT_EQ(123, f3->value());
-    EXPECT_NE(f2, f3);
-
-    const absl::any o4(4);
-    // copy construct from const lvalue ref.
-    absl::any o5 = o4;
-    EXPECT_EQ(4, absl::any_cast<int>(o4));
-    EXPECT_EQ(4, absl::any_cast<int>(o5));
-
-    // Copy construct from const rvalue ref.
-    absl::any o6 = std::move(o4);  // NOLINT
-    EXPECT_EQ(4, absl::any_cast<int>(o4));
-    EXPECT_EQ(4, absl::any_cast<int>(o6));
-  }
-}
-
-TEST(AnyTest, Move) {
-  InstanceTracker tracker_raii;
-
-  absl::any any1;
-  any1.emplace<CopyableOnlyInstance>(5);
-
-  // This is a copy, so copy count increases to 1.
-  absl::any any2 = any1;
-  EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any1).value());
-  EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any2).value());
-  EXPECT_EQ(1, tracker_raii.copies());
-
-  // This isn't a copy, so copy count doesn't increase.
-  absl::any any3 = std::move(any2);
-  EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any3).value());
-  EXPECT_EQ(1, tracker_raii.copies());
-
-  absl::any any4;
-  any4 = std::move(any3);
-  EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any4).value());
-  EXPECT_EQ(1, tracker_raii.copies());
-
-  absl::any tmp4(4);
-  absl::any o4(std::move(tmp4));  // move construct
-  EXPECT_EQ(4, absl::any_cast<int>(o4));
-  o4 = *&o4;  // self assign
-  EXPECT_EQ(4, absl::any_cast<int>(o4));
-  EXPECT_TRUE(o4.has_value());
-
-  absl::any o5;
-  absl::any tmp5(5);
-  o5 = std::move(tmp5);  // move assign
-  EXPECT_EQ(5, absl::any_cast<int>(o5));
-}
-
-// Reset the ObjectOwner with an object of a different type
-TEST(AnyTest, Reset) {
-  absl::any o;
-  o.emplace<int>();
-
-  o.reset();
-  EXPECT_FALSE(o.has_value());
-
-  o.emplace<char>();
-  EXPECT_TRUE(o.has_value());
-}
-
-TEST(AnyTest, ConversionConstructionCausesOneCopy) {
-  InstanceTracker tracker_raii;
-  CopyableOnlyInstance counter(5);
-  absl::any o(counter);
-  EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(o).value());
-  EXPECT_EQ(1, tracker_raii.copies());
-}
-
-//////////////////////////////////
-// Tests for Exception Behavior //
-//////////////////////////////////
-
-#if defined(ABSL_USES_STD_ANY)
-
-// If using a std `any` implementation, we can't check for a specific message.
-#define ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(...)                      \
-  ABSL_BASE_INTERNAL_EXPECT_FAIL((__VA_ARGS__), absl::bad_any_cast, \
-                                 "")
-
-#else
-
-// If using the absl `any` implementation, we can rely on a specific message.
-#define ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(...)                      \
-  ABSL_BASE_INTERNAL_EXPECT_FAIL((__VA_ARGS__), absl::bad_any_cast, \
-                                 "Bad any cast")
-
-#endif  // defined(ABSL_USES_STD_ANY)
-
-TEST(AnyTest, ThrowBadAlloc) {
-  {
-    absl::any a;
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int&>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int&>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int&&>(absl::any{}));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int&&>(absl::any{}));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int>(absl::any{}));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int>(absl::any{}));
-
-    // const absl::any operand
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int&>(AsConst(a)));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int>(AsConst(a)));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int>(AsConst(a)));
-  }
-
-  {
-    absl::any a(absl::in_place_type<int>);
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float&>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float&>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float&&>(absl::any{}));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(
-        absl::any_cast<const float&&>(absl::any{}));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float>(a));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float>(absl::any{}));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float>(absl::any{}));
-
-    // const absl::any operand
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float&>(AsConst(a)));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float>(AsConst(a)));
-    ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float>(AsConst(a)));
-  }
-}
-
-class BadCopy {};
-
-struct BadCopyable {
-  BadCopyable() = default;
-  BadCopyable(BadCopyable&&) = default;
-  BadCopyable(const BadCopyable&) {
-#ifdef ABSL_HAVE_EXCEPTIONS
-    throw BadCopy();
-#else
-    ABSL_RAW_LOG(FATAL, "Bad copy");
-#endif
-  }
-};
-
-#define ABSL_ANY_TEST_EXPECT_BAD_COPY(...) \
-  ABSL_BASE_INTERNAL_EXPECT_FAIL((__VA_ARGS__), BadCopy, "Bad copy")
-
-// Test the guarantees regarding exceptions in copy/assign.
-TEST(AnyTest, FailedCopy) {
-  {
-    const BadCopyable bad{};
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(absl::any{bad});
-  }
-
-  {
-    absl::any src(absl::in_place_type<BadCopyable>);
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(absl::any{src});
-  }
-
-  {
-    BadCopyable bad;
-    absl::any target;
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target = bad);
-  }
-
-  {
-    BadCopyable bad;
-    absl::any target(absl::in_place_type<BadCopyable>);
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target = bad);
-    EXPECT_TRUE(target.has_value());
-  }
-
-  {
-    absl::any src(absl::in_place_type<BadCopyable>);
-    absl::any target;
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target = src);
-    EXPECT_FALSE(target.has_value());
-  }
-
-  {
-    absl::any src(absl::in_place_type<BadCopyable>);
-    absl::any target(absl::in_place_type<BadCopyable>);
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target = src);
-    EXPECT_TRUE(target.has_value());
-  }
-}
-
-// Test the guarantees regarding exceptions in emplace.
-TEST(AnyTest, FailedEmplace) {
-  {
-    BadCopyable bad;
-    absl::any target;
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad));
-  }
-
-  {
-    BadCopyable bad;
-    absl::any target(absl::in_place_type<int>);
-    ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad));
-#if defined(ABSL_USES_STD_ANY) && defined(__GLIBCXX__)
-    // libstdc++ std::any::emplace() implementation (as of 7.2) has a bug: if an
-    // exception is thrown, *this contains a value.
-#define ABSL_GLIBCXX_ANY_EMPLACE_EXCEPTION_BUG 1
-#endif
-#if defined(ABSL_HAVE_EXCEPTIONS) && \
-    !defined(ABSL_GLIBCXX_ANY_EMPLACE_EXCEPTION_BUG)
-    EXPECT_FALSE(target.has_value());
-#endif
-  }
-}
-
-}  // namespace
-
-#endif  // #if !defined(ABSL_USES_STD_ANY)
diff --git a/third_party/abseil/absl/types/bad_any_cast.cc b/third_party/abseil/absl/types/bad_any_cast.cc
deleted file mode 100644
index b0592cc..0000000
--- a/third_party/abseil/absl/types/bad_any_cast.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/bad_any_cast.h"
-
-#ifndef ABSL_USES_STD_ANY
-
-#include <cstdlib>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-bad_any_cast::~bad_any_cast() = default;
-
-const char* bad_any_cast::what() const noexcept { return "Bad any cast"; }
-
-namespace any_internal {
-
-void ThrowBadAnyCast() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  throw bad_any_cast();
-#else
-  ABSL_RAW_LOG(FATAL, "Bad any cast");
-  std::abort();
-#endif
-}
-
-}  // namespace any_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_ANY
diff --git a/third_party/abseil/absl/types/bad_any_cast.h b/third_party/abseil/absl/types/bad_any_cast.h
deleted file mode 100644
index 114cef8..0000000
--- a/third_party/abseil/absl/types/bad_any_cast.h
+++ /dev/null
@@ -1,75 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// bad_any_cast.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::bad_any_cast` type.
-
-#ifndef ABSL_TYPES_BAD_ANY_CAST_H_
-#define ABSL_TYPES_BAD_ANY_CAST_H_
-
-#include <typeinfo>
-
-#include "absl/base/config.h"
-
-#ifdef ABSL_USES_STD_ANY
-
-#include <any>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using std::bad_any_cast;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_ANY
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// bad_any_cast
-// -----------------------------------------------------------------------------
-//
-// An `absl::bad_any_cast` type is an exception type that is thrown when
-// failing to successfully cast the return value of an `absl::any` object.
-//
-// Example:
-//
-//   auto a = absl::any(65);
-//   absl::any_cast<int>(a);         // 65
-//   try {
-//     absl::any_cast<char>(a);
-//   } catch(const absl::bad_any_cast& e) {
-//     std::cout << "Bad any cast: " << e.what() << '\n';
-//   }
-class bad_any_cast : public std::bad_cast {
- public:
-  ~bad_any_cast() override;
-  const char* what() const noexcept override;
-};
-
-namespace any_internal {
-
-[[noreturn]] void ThrowBadAnyCast();
-
-}  // namespace any_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_ANY
-
-#endif  // ABSL_TYPES_BAD_ANY_CAST_H_
diff --git a/third_party/abseil/absl/types/bad_optional_access.cc b/third_party/abseil/absl/types/bad_optional_access.cc
deleted file mode 100644
index 26aca70..0000000
--- a/third_party/abseil/absl/types/bad_optional_access.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/bad_optional_access.h"
-
-#ifndef ABSL_USES_STD_OPTIONAL
-
-#include <cstdlib>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-bad_optional_access::~bad_optional_access() = default;
-
-const char* bad_optional_access::what() const noexcept {
-  return "optional has no value";
-}
-
-namespace optional_internal {
-
-void throw_bad_optional_access() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  throw bad_optional_access();
-#else
-  ABSL_RAW_LOG(FATAL, "Bad optional access");
-  abort();
-#endif
-}
-
-}  // namespace optional_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_OPTIONAL
diff --git a/third_party/abseil/absl/types/bad_optional_access.h b/third_party/abseil/absl/types/bad_optional_access.h
deleted file mode 100644
index a500286..0000000
--- a/third_party/abseil/absl/types/bad_optional_access.h
+++ /dev/null
@@ -1,78 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// bad_optional_access.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::bad_optional_access` type.
-
-#ifndef ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_
-#define ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_
-
-#include <stdexcept>
-
-#include "absl/base/config.h"
-
-#ifdef ABSL_USES_STD_OPTIONAL
-
-#include <optional>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using std::bad_optional_access;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_OPTIONAL
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// bad_optional_access
-// -----------------------------------------------------------------------------
-//
-// An `absl::bad_optional_access` type is an exception type that is thrown when
-// attempting to access an `absl::optional` object that does not contain a
-// value.
-//
-// Example:
-//
-//   absl::optional<int> o;
-//
-//   try {
-//     int n = o.value();
-//   } catch(const absl::bad_optional_access& e) {
-//     std::cout << "Bad optional access: " << e.what() << '\n';
-//   }
-class bad_optional_access : public std::exception {
- public:
-  bad_optional_access() = default;
-  ~bad_optional_access() override;
-  const char* what() const noexcept override;
-};
-
-namespace optional_internal {
-
-// throw delegator
-[[noreturn]] void throw_bad_optional_access();
-
-}  // namespace optional_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_OPTIONAL
-
-#endif  // ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_
diff --git a/third_party/abseil/absl/types/bad_variant_access.cc b/third_party/abseil/absl/types/bad_variant_access.cc
deleted file mode 100644
index 3dc88cc..0000000
--- a/third_party/abseil/absl/types/bad_variant_access.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/bad_variant_access.h"
-
-#ifndef ABSL_USES_STD_VARIANT
-
-#include <cstdlib>
-#include <stdexcept>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-//////////////////////////
-// [variant.bad.access] //
-//////////////////////////
-
-bad_variant_access::~bad_variant_access() = default;
-
-const char* bad_variant_access::what() const noexcept {
-  return "Bad variant access";
-}
-
-namespace variant_internal {
-
-void ThrowBadVariantAccess() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  throw bad_variant_access();
-#else
-  ABSL_RAW_LOG(FATAL, "Bad variant access");
-  abort();  // TODO(calabrese) Remove once RAW_LOG FATAL is noreturn.
-#endif
-}
-
-void Rethrow() {
-#ifdef ABSL_HAVE_EXCEPTIONS
-  throw;
-#else
-  ABSL_RAW_LOG(FATAL,
-               "Internal error in absl::variant implementation. Attempted to "
-               "rethrow an exception when building with exceptions disabled.");
-  abort();  // TODO(calabrese) Remove once RAW_LOG FATAL is noreturn.
-#endif
-}
-
-}  // namespace variant_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_VARIANT
diff --git a/third_party/abseil/absl/types/bad_variant_access.h b/third_party/abseil/absl/types/bad_variant_access.h
deleted file mode 100644
index 095969f..0000000
--- a/third_party/abseil/absl/types/bad_variant_access.h
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// bad_variant_access.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::bad_variant_access` type.
-
-#ifndef ABSL_TYPES_BAD_VARIANT_ACCESS_H_
-#define ABSL_TYPES_BAD_VARIANT_ACCESS_H_
-
-#include <stdexcept>
-
-#include "absl/base/config.h"
-
-#ifdef ABSL_USES_STD_VARIANT
-
-#include <variant>
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using std::bad_variant_access;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_VARIANT
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// bad_variant_access
-// -----------------------------------------------------------------------------
-//
-// An `absl::bad_variant_access` type is an exception type that is thrown in
-// the following cases:
-//
-//   * Calling `absl::get(absl::variant) with an index or type that does not
-//     match the currently selected alternative type
-//   * Calling `absl::visit on an `absl::variant` that is in the
-//     `variant::valueless_by_exception` state.
-//
-// Example:
-//
-//   absl::variant<int, std::string> v;
-//   v = 1;
-//   try {
-//     absl::get<std::string>(v);
-//   } catch(const absl::bad_variant_access& e) {
-//     std::cout << "Bad variant access: " << e.what() << '\n';
-//   }
-class bad_variant_access : public std::exception {
- public:
-  bad_variant_access() noexcept = default;
-  ~bad_variant_access() override;
-  const char* what() const noexcept override;
-};
-
-namespace variant_internal {
-
-[[noreturn]] void ThrowBadVariantAccess();
-[[noreturn]] void Rethrow();
-
-}  // namespace variant_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_USES_STD_VARIANT
-
-#endif  // ABSL_TYPES_BAD_VARIANT_ACCESS_H_
diff --git a/third_party/abseil/absl/types/compare.h b/third_party/abseil/absl/types/compare.h
deleted file mode 100644
index 19b076e..0000000
--- a/third_party/abseil/absl/types/compare.h
+++ /dev/null
@@ -1,600 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// compare.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::weak_equality`, `absl::strong_equality`,
-// `absl::partial_ordering`, `absl::weak_ordering`, and `absl::strong_ordering`
-// types for storing the results of three way comparisons.
-//
-// Example:
-//   absl::weak_ordering compare(const std::string& a, const std::string& b);
-//
-// These are C++11 compatible versions of the C++20 corresponding types
-// (`std::weak_equality`, etc.) and are designed to be drop-in replacements
-// for code compliant with C++20.
-
-#ifndef ABSL_TYPES_COMPARE_H_
-#define ABSL_TYPES_COMPARE_H_
-
-#include <cstddef>
-#include <cstdint>
-#include <cstdlib>
-#include <type_traits>
-
-#include "absl/base/attributes.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace compare_internal {
-
-using value_type = int8_t;
-
-template <typename T>
-struct Fail {
-  static_assert(sizeof(T) < 0, "Only literal `0` is allowed.");
-};
-
-// We need the NullPtrT template to avoid triggering the modernize-use-nullptr
-// ClangTidy warning in user code.
-template <typename NullPtrT = std::nullptr_t>
-struct OnlyLiteralZero {
-  constexpr OnlyLiteralZero(NullPtrT) noexcept {}  // NOLINT
-
-  // Fails compilation when `nullptr` or integral type arguments other than
-  // `int` are passed. This constructor doesn't accept `int` because literal `0`
-  // has type `int`. Literal `0` arguments will be implicitly converted to
-  // `std::nullptr_t` and accepted by the above constructor, while other `int`
-  // arguments will fail to be converted and cause compilation failure.
-  template <
-      typename T,
-      typename = typename std::enable_if<
-          std::is_same<T, std::nullptr_t>::value ||
-          (std::is_integral<T>::value && !std::is_same<T, int>::value)>::type,
-      typename = typename Fail<T>::type>
-  OnlyLiteralZero(T);  // NOLINT
-};
-
-enum class eq : value_type {
-  equal = 0,
-  equivalent = equal,
-  nonequal = 1,
-  nonequivalent = nonequal,
-};
-
-enum class ord : value_type { less = -1, greater = 1 };
-
-enum class ncmp : value_type { unordered = -127 };
-
-// Define macros to allow for creation or emulation of C++17 inline variables
-// based on whether the feature is supported. Note: we can't use
-// ABSL_INTERNAL_INLINE_CONSTEXPR here because the variables here are of
-// incomplete types so they need to be defined after the types are complete.
-#ifdef __cpp_inline_variables
-
-// A no-op expansion that can be followed by a semicolon at class level.
-#define ABSL_COMPARE_INLINE_BASECLASS_DECL(name) static_assert(true, "")
-
-#define ABSL_COMPARE_INLINE_SUBCLASS_DECL(type, name) \
-  static const type name
-
-#define ABSL_COMPARE_INLINE_INIT(type, name, init) \
-  inline constexpr type type::name(init)
-
-#else  // __cpp_inline_variables
-
-#define ABSL_COMPARE_INLINE_BASECLASS_DECL(name) \
-  ABSL_CONST_INIT static const T name
-
-// A no-op expansion that can be followed by a semicolon at class level.
-#define ABSL_COMPARE_INLINE_SUBCLASS_DECL(type, name) static_assert(true, "")
-
-#define ABSL_COMPARE_INLINE_INIT(type, name, init) \
-  template <typename T>                            \
-  const T compare_internal::type##_base<T>::name(init)
-
-#endif  // __cpp_inline_variables
-
-// These template base classes allow for defining the values of the constants
-// in the header file (for performance) without using inline variables (which
-// aren't available in C++11).
-template <typename T>
-struct weak_equality_base {
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(nonequivalent);
-};
-
-template <typename T>
-struct strong_equality_base {
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equal);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(nonequal);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(nonequivalent);
-};
-
-template <typename T>
-struct partial_ordering_base {
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(less);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(greater);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(unordered);
-};
-
-template <typename T>
-struct weak_ordering_base {
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(less);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(greater);
-};
-
-template <typename T>
-struct strong_ordering_base {
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(less);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equal);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(equivalent);
-  ABSL_COMPARE_INLINE_BASECLASS_DECL(greater);
-};
-
-}  // namespace compare_internal
-
-class weak_equality
-    : public compare_internal::weak_equality_base<weak_equality> {
-  explicit constexpr weak_equality(compare_internal::eq v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  friend struct compare_internal::weak_equality_base<weak_equality>;
-
- public:
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_equality, equivalent);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_equality, nonequivalent);
-
-  // Comparisons
-  friend constexpr bool operator==(
-      weak_equality v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ == 0;
-  }
-  friend constexpr bool operator!=(
-      weak_equality v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ != 0;
-  }
-  friend constexpr bool operator==(compare_internal::OnlyLiteralZero<>,
-                                   weak_equality v) noexcept {
-    return 0 == v.value_;
-  }
-  friend constexpr bool operator!=(compare_internal::OnlyLiteralZero<>,
-                                   weak_equality v) noexcept {
-    return 0 != v.value_;
-  }
-  friend constexpr bool operator==(weak_equality v1,
-                                   weak_equality v2) noexcept {
-    return v1.value_ == v2.value_;
-  }
-  friend constexpr bool operator!=(weak_equality v1,
-                                   weak_equality v2) noexcept {
-    return v1.value_ != v2.value_;
-  }
-
- private:
-  compare_internal::value_type value_;
-};
-ABSL_COMPARE_INLINE_INIT(weak_equality, equivalent,
-                         compare_internal::eq::equivalent);
-ABSL_COMPARE_INLINE_INIT(weak_equality, nonequivalent,
-                         compare_internal::eq::nonequivalent);
-
-class strong_equality
-    : public compare_internal::strong_equality_base<strong_equality> {
-  explicit constexpr strong_equality(compare_internal::eq v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  friend struct compare_internal::strong_equality_base<strong_equality>;
-
- public:
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, equal);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, nonequal);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, equivalent);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_equality, nonequivalent);
-
-  // Conversion
-  constexpr operator weak_equality() const noexcept {  // NOLINT
-    return value_ == 0 ? weak_equality::equivalent
-                       : weak_equality::nonequivalent;
-  }
-  // Comparisons
-  friend constexpr bool operator==(
-      strong_equality v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ == 0;
-  }
-  friend constexpr bool operator!=(
-      strong_equality v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ != 0;
-  }
-  friend constexpr bool operator==(compare_internal::OnlyLiteralZero<>,
-                                   strong_equality v) noexcept {
-    return 0 == v.value_;
-  }
-  friend constexpr bool operator!=(compare_internal::OnlyLiteralZero<>,
-                                   strong_equality v) noexcept {
-    return 0 != v.value_;
-  }
-  friend constexpr bool operator==(strong_equality v1,
-                                   strong_equality v2) noexcept {
-    return v1.value_ == v2.value_;
-  }
-  friend constexpr bool operator!=(strong_equality v1,
-                                   strong_equality v2) noexcept {
-    return v1.value_ != v2.value_;
-  }
-
- private:
-  compare_internal::value_type value_;
-};
-ABSL_COMPARE_INLINE_INIT(strong_equality, equal, compare_internal::eq::equal);
-ABSL_COMPARE_INLINE_INIT(strong_equality, nonequal,
-                         compare_internal::eq::nonequal);
-ABSL_COMPARE_INLINE_INIT(strong_equality, equivalent,
-                         compare_internal::eq::equivalent);
-ABSL_COMPARE_INLINE_INIT(strong_equality, nonequivalent,
-                         compare_internal::eq::nonequivalent);
-
-class partial_ordering
-    : public compare_internal::partial_ordering_base<partial_ordering> {
-  explicit constexpr partial_ordering(compare_internal::eq v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  explicit constexpr partial_ordering(compare_internal::ord v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  explicit constexpr partial_ordering(compare_internal::ncmp v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  friend struct compare_internal::partial_ordering_base<partial_ordering>;
-
-  constexpr bool is_ordered() const noexcept {
-    return value_ !=
-           compare_internal::value_type(compare_internal::ncmp::unordered);
-  }
-
- public:
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, less);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, equivalent);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, greater);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(partial_ordering, unordered);
-
-  // Conversion
-  constexpr operator weak_equality() const noexcept {  // NOLINT
-    return value_ == 0 ? weak_equality::equivalent
-                       : weak_equality::nonequivalent;
-  }
-  // Comparisons
-  friend constexpr bool operator==(
-      partial_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.is_ordered() && v.value_ == 0;
-  }
-  friend constexpr bool operator!=(
-      partial_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return !v.is_ordered() || v.value_ != 0;
-  }
-  friend constexpr bool operator<(
-      partial_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.is_ordered() && v.value_ < 0;
-  }
-  friend constexpr bool operator<=(
-      partial_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.is_ordered() && v.value_ <= 0;
-  }
-  friend constexpr bool operator>(
-      partial_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.is_ordered() && v.value_ > 0;
-  }
-  friend constexpr bool operator>=(
-      partial_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.is_ordered() && v.value_ >= 0;
-  }
-  friend constexpr bool operator==(compare_internal::OnlyLiteralZero<>,
-                                   partial_ordering v) noexcept {
-    return v.is_ordered() && 0 == v.value_;
-  }
-  friend constexpr bool operator!=(compare_internal::OnlyLiteralZero<>,
-                                   partial_ordering v) noexcept {
-    return !v.is_ordered() || 0 != v.value_;
-  }
-  friend constexpr bool operator<(compare_internal::OnlyLiteralZero<>,
-                                  partial_ordering v) noexcept {
-    return v.is_ordered() && 0 < v.value_;
-  }
-  friend constexpr bool operator<=(compare_internal::OnlyLiteralZero<>,
-                                   partial_ordering v) noexcept {
-    return v.is_ordered() && 0 <= v.value_;
-  }
-  friend constexpr bool operator>(compare_internal::OnlyLiteralZero<>,
-                                  partial_ordering v) noexcept {
-    return v.is_ordered() && 0 > v.value_;
-  }
-  friend constexpr bool operator>=(compare_internal::OnlyLiteralZero<>,
-                                   partial_ordering v) noexcept {
-    return v.is_ordered() && 0 >= v.value_;
-  }
-  friend constexpr bool operator==(partial_ordering v1,
-                                   partial_ordering v2) noexcept {
-    return v1.value_ == v2.value_;
-  }
-  friend constexpr bool operator!=(partial_ordering v1,
-                                   partial_ordering v2) noexcept {
-    return v1.value_ != v2.value_;
-  }
-
- private:
-  compare_internal::value_type value_;
-};
-ABSL_COMPARE_INLINE_INIT(partial_ordering, less, compare_internal::ord::less);
-ABSL_COMPARE_INLINE_INIT(partial_ordering, equivalent,
-                         compare_internal::eq::equivalent);
-ABSL_COMPARE_INLINE_INIT(partial_ordering, greater,
-                         compare_internal::ord::greater);
-ABSL_COMPARE_INLINE_INIT(partial_ordering, unordered,
-                         compare_internal::ncmp::unordered);
-
-class weak_ordering
-    : public compare_internal::weak_ordering_base<weak_ordering> {
-  explicit constexpr weak_ordering(compare_internal::eq v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  explicit constexpr weak_ordering(compare_internal::ord v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  friend struct compare_internal::weak_ordering_base<weak_ordering>;
-
- public:
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_ordering, less);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_ordering, equivalent);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(weak_ordering, greater);
-
-  // Conversions
-  constexpr operator weak_equality() const noexcept {  // NOLINT
-    return value_ == 0 ? weak_equality::equivalent
-                       : weak_equality::nonequivalent;
-  }
-  constexpr operator partial_ordering() const noexcept {  // NOLINT
-    return value_ == 0 ? partial_ordering::equivalent
-                       : (value_ < 0 ? partial_ordering::less
-                                     : partial_ordering::greater);
-  }
-  // Comparisons
-  friend constexpr bool operator==(
-      weak_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ == 0;
-  }
-  friend constexpr bool operator!=(
-      weak_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ != 0;
-  }
-  friend constexpr bool operator<(
-      weak_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ < 0;
-  }
-  friend constexpr bool operator<=(
-      weak_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ <= 0;
-  }
-  friend constexpr bool operator>(
-      weak_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ > 0;
-  }
-  friend constexpr bool operator>=(
-      weak_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ >= 0;
-  }
-  friend constexpr bool operator==(compare_internal::OnlyLiteralZero<>,
-                                   weak_ordering v) noexcept {
-    return 0 == v.value_;
-  }
-  friend constexpr bool operator!=(compare_internal::OnlyLiteralZero<>,
-                                   weak_ordering v) noexcept {
-    return 0 != v.value_;
-  }
-  friend constexpr bool operator<(compare_internal::OnlyLiteralZero<>,
-                                  weak_ordering v) noexcept {
-    return 0 < v.value_;
-  }
-  friend constexpr bool operator<=(compare_internal::OnlyLiteralZero<>,
-                                   weak_ordering v) noexcept {
-    return 0 <= v.value_;
-  }
-  friend constexpr bool operator>(compare_internal::OnlyLiteralZero<>,
-                                  weak_ordering v) noexcept {
-    return 0 > v.value_;
-  }
-  friend constexpr bool operator>=(compare_internal::OnlyLiteralZero<>,
-                                   weak_ordering v) noexcept {
-    return 0 >= v.value_;
-  }
-  friend constexpr bool operator==(weak_ordering v1,
-                                   weak_ordering v2) noexcept {
-    return v1.value_ == v2.value_;
-  }
-  friend constexpr bool operator!=(weak_ordering v1,
-                                   weak_ordering v2) noexcept {
-    return v1.value_ != v2.value_;
-  }
-
- private:
-  compare_internal::value_type value_;
-};
-ABSL_COMPARE_INLINE_INIT(weak_ordering, less, compare_internal::ord::less);
-ABSL_COMPARE_INLINE_INIT(weak_ordering, equivalent,
-                         compare_internal::eq::equivalent);
-ABSL_COMPARE_INLINE_INIT(weak_ordering, greater,
-                         compare_internal::ord::greater);
-
-class strong_ordering
-    : public compare_internal::strong_ordering_base<strong_ordering> {
-  explicit constexpr strong_ordering(compare_internal::eq v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  explicit constexpr strong_ordering(compare_internal::ord v) noexcept
-      : value_(static_cast<compare_internal::value_type>(v)) {}
-  friend struct compare_internal::strong_ordering_base<strong_ordering>;
-
- public:
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, less);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, equal);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, equivalent);
-  ABSL_COMPARE_INLINE_SUBCLASS_DECL(strong_ordering, greater);
-
-  // Conversions
-  constexpr operator weak_equality() const noexcept {  // NOLINT
-    return value_ == 0 ? weak_equality::equivalent
-                       : weak_equality::nonequivalent;
-  }
-  constexpr operator strong_equality() const noexcept {  // NOLINT
-    return value_ == 0 ? strong_equality::equal : strong_equality::nonequal;
-  }
-  constexpr operator partial_ordering() const noexcept {  // NOLINT
-    return value_ == 0 ? partial_ordering::equivalent
-                       : (value_ < 0 ? partial_ordering::less
-                                     : partial_ordering::greater);
-  }
-  constexpr operator weak_ordering() const noexcept {  // NOLINT
-    return value_ == 0
-               ? weak_ordering::equivalent
-               : (value_ < 0 ? weak_ordering::less : weak_ordering::greater);
-  }
-  // Comparisons
-  friend constexpr bool operator==(
-      strong_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ == 0;
-  }
-  friend constexpr bool operator!=(
-      strong_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ != 0;
-  }
-  friend constexpr bool operator<(
-      strong_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ < 0;
-  }
-  friend constexpr bool operator<=(
-      strong_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ <= 0;
-  }
-  friend constexpr bool operator>(
-      strong_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ > 0;
-  }
-  friend constexpr bool operator>=(
-      strong_ordering v, compare_internal::OnlyLiteralZero<>) noexcept {
-    return v.value_ >= 0;
-  }
-  friend constexpr bool operator==(compare_internal::OnlyLiteralZero<>,
-                                   strong_ordering v) noexcept {
-    return 0 == v.value_;
-  }
-  friend constexpr bool operator!=(compare_internal::OnlyLiteralZero<>,
-                                   strong_ordering v) noexcept {
-    return 0 != v.value_;
-  }
-  friend constexpr bool operator<(compare_internal::OnlyLiteralZero<>,
-                                  strong_ordering v) noexcept {
-    return 0 < v.value_;
-  }
-  friend constexpr bool operator<=(compare_internal::OnlyLiteralZero<>,
-                                   strong_ordering v) noexcept {
-    return 0 <= v.value_;
-  }
-  friend constexpr bool operator>(compare_internal::OnlyLiteralZero<>,
-                                  strong_ordering v) noexcept {
-    return 0 > v.value_;
-  }
-  friend constexpr bool operator>=(compare_internal::OnlyLiteralZero<>,
-                                   strong_ordering v) noexcept {
-    return 0 >= v.value_;
-  }
-  friend constexpr bool operator==(strong_ordering v1,
-                                   strong_ordering v2) noexcept {
-    return v1.value_ == v2.value_;
-  }
-  friend constexpr bool operator!=(strong_ordering v1,
-                                   strong_ordering v2) noexcept {
-    return v1.value_ != v2.value_;
-  }
-
- private:
-  compare_internal::value_type value_;
-};
-ABSL_COMPARE_INLINE_INIT(strong_ordering, less, compare_internal::ord::less);
-ABSL_COMPARE_INLINE_INIT(strong_ordering, equal, compare_internal::eq::equal);
-ABSL_COMPARE_INLINE_INIT(strong_ordering, equivalent,
-                         compare_internal::eq::equivalent);
-ABSL_COMPARE_INLINE_INIT(strong_ordering, greater,
-                         compare_internal::ord::greater);
-
-#undef ABSL_COMPARE_INLINE_BASECLASS_DECL
-#undef ABSL_COMPARE_INLINE_SUBCLASS_DECL
-#undef ABSL_COMPARE_INLINE_INIT
-
-namespace compare_internal {
-// We also provide these comparator adapter functions for internal absl use.
-
-// Helper functions to do a boolean comparison of two keys given a boolean
-// or three-way comparator.
-// SFINAE prevents implicit conversions to bool (such as from int).
-template <typename Bool,
-          absl::enable_if_t<std::is_same<bool, Bool>::value, int> = 0>
-constexpr bool compare_result_as_less_than(const Bool r) { return r; }
-constexpr bool compare_result_as_less_than(const absl::weak_ordering r) {
-  return r < 0;
-}
-
-template <typename Compare, typename K, typename LK>
-constexpr bool do_less_than_comparison(const Compare &compare, const K &x,
-                                       const LK &y) {
-  return compare_result_as_less_than(compare(x, y));
-}
-
-// Helper functions to do a three-way comparison of two keys given a boolean or
-// three-way comparator.
-// SFINAE prevents implicit conversions to int (such as from bool).
-template <typename Int,
-          absl::enable_if_t<std::is_same<int, Int>::value, int> = 0>
-constexpr absl::weak_ordering compare_result_as_ordering(const Int c) {
-  return c < 0 ? absl::weak_ordering::less
-               : c == 0 ? absl::weak_ordering::equivalent
-                        : absl::weak_ordering::greater;
-}
-constexpr absl::weak_ordering compare_result_as_ordering(
-    const absl::weak_ordering c) {
-  return c;
-}
-
-template <
-    typename Compare, typename K, typename LK,
-    absl::enable_if_t<!std::is_same<bool, absl::result_of_t<Compare(
-                                              const K &, const LK &)>>::value,
-                      int> = 0>
-constexpr absl::weak_ordering do_three_way_comparison(const Compare &compare,
-                                                      const K &x, const LK &y) {
-  return compare_result_as_ordering(compare(x, y));
-}
-template <
-    typename Compare, typename K, typename LK,
-    absl::enable_if_t<std::is_same<bool, absl::result_of_t<Compare(
-                                             const K &, const LK &)>>::value,
-                      int> = 0>
-constexpr absl::weak_ordering do_three_way_comparison(const Compare &compare,
-                                                      const K &x, const LK &y) {
-  return compare(x, y) ? absl::weak_ordering::less
-                       : compare(y, x) ? absl::weak_ordering::greater
-                                       : absl::weak_ordering::equivalent;
-}
-
-}  // namespace compare_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TYPES_COMPARE_H_
diff --git a/third_party/abseil/absl/types/compare_test.cc b/third_party/abseil/absl/types/compare_test.cc
deleted file mode 100644
index 8095baf..0000000
--- a/third_party/abseil/absl/types/compare_test.cc
+++ /dev/null
@@ -1,389 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/compare.h"
-
-#include "gtest/gtest.h"
-#include "absl/base/casts.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-// This is necessary to avoid a bunch of lint warnings suggesting that we use
-// EXPECT_EQ/etc., which doesn't work in this case because they convert the `0`
-// to an int, which can't be converted to the unspecified zero type.
-bool Identity(bool b) { return b; }
-
-TEST(Compare, WeakEquality) {
-  EXPECT_TRUE(Identity(weak_equality::equivalent == 0));
-  EXPECT_TRUE(Identity(0 == weak_equality::equivalent));
-  EXPECT_TRUE(Identity(weak_equality::nonequivalent != 0));
-  EXPECT_TRUE(Identity(0 != weak_equality::nonequivalent));
-  const weak_equality values[] = {weak_equality::equivalent,
-                                  weak_equality::nonequivalent};
-  for (const auto& lhs : values) {
-    for (const auto& rhs : values) {
-      const bool are_equal = &lhs == &rhs;
-      EXPECT_EQ(lhs == rhs, are_equal);
-      EXPECT_EQ(lhs != rhs, !are_equal);
-    }
-  }
-}
-
-TEST(Compare, StrongEquality) {
-  EXPECT_TRUE(Identity(strong_equality::equal == 0));
-  EXPECT_TRUE(Identity(0 == strong_equality::equal));
-  EXPECT_TRUE(Identity(strong_equality::nonequal != 0));
-  EXPECT_TRUE(Identity(0 != strong_equality::nonequal));
-  EXPECT_TRUE(Identity(strong_equality::equivalent == 0));
-  EXPECT_TRUE(Identity(0 == strong_equality::equivalent));
-  EXPECT_TRUE(Identity(strong_equality::nonequivalent != 0));
-  EXPECT_TRUE(Identity(0 != strong_equality::nonequivalent));
-  const strong_equality values[] = {strong_equality::equal,
-                                    strong_equality::nonequal};
-  for (const auto& lhs : values) {
-    for (const auto& rhs : values) {
-      const bool are_equal = &lhs == &rhs;
-      EXPECT_EQ(lhs == rhs, are_equal);
-      EXPECT_EQ(lhs != rhs, !are_equal);
-    }
-  }
-  EXPECT_TRUE(Identity(strong_equality::equivalent == strong_equality::equal));
-  EXPECT_TRUE(
-      Identity(strong_equality::nonequivalent == strong_equality::nonequal));
-}
-
-TEST(Compare, PartialOrdering) {
-  EXPECT_TRUE(Identity(partial_ordering::less < 0));
-  EXPECT_TRUE(Identity(0 > partial_ordering::less));
-  EXPECT_TRUE(Identity(partial_ordering::less <= 0));
-  EXPECT_TRUE(Identity(0 >= partial_ordering::less));
-  EXPECT_TRUE(Identity(partial_ordering::equivalent == 0));
-  EXPECT_TRUE(Identity(0 == partial_ordering::equivalent));
-  EXPECT_TRUE(Identity(partial_ordering::greater > 0));
-  EXPECT_TRUE(Identity(0 < partial_ordering::greater));
-  EXPECT_TRUE(Identity(partial_ordering::greater >= 0));
-  EXPECT_TRUE(Identity(0 <= partial_ordering::greater));
-  EXPECT_TRUE(Identity(partial_ordering::unordered != 0));
-  EXPECT_TRUE(Identity(0 != partial_ordering::unordered));
-  EXPECT_FALSE(Identity(partial_ordering::unordered < 0));
-  EXPECT_FALSE(Identity(0 < partial_ordering::unordered));
-  EXPECT_FALSE(Identity(partial_ordering::unordered <= 0));
-  EXPECT_FALSE(Identity(0 <= partial_ordering::unordered));
-  EXPECT_FALSE(Identity(partial_ordering::unordered > 0));
-  EXPECT_FALSE(Identity(0 > partial_ordering::unordered));
-  EXPECT_FALSE(Identity(partial_ordering::unordered >= 0));
-  EXPECT_FALSE(Identity(0 >= partial_ordering::unordered));
-  const partial_ordering values[] = {
-      partial_ordering::less, partial_ordering::equivalent,
-      partial_ordering::greater, partial_ordering::unordered};
-  for (const auto& lhs : values) {
-    for (const auto& rhs : values) {
-      const bool are_equal = &lhs == &rhs;
-      EXPECT_EQ(lhs == rhs, are_equal);
-      EXPECT_EQ(lhs != rhs, !are_equal);
-    }
-  }
-}
-
-TEST(Compare, WeakOrdering) {
-  EXPECT_TRUE(Identity(weak_ordering::less < 0));
-  EXPECT_TRUE(Identity(0 > weak_ordering::less));
-  EXPECT_TRUE(Identity(weak_ordering::less <= 0));
-  EXPECT_TRUE(Identity(0 >= weak_ordering::less));
-  EXPECT_TRUE(Identity(weak_ordering::equivalent == 0));
-  EXPECT_TRUE(Identity(0 == weak_ordering::equivalent));
-  EXPECT_TRUE(Identity(weak_ordering::greater > 0));
-  EXPECT_TRUE(Identity(0 < weak_ordering::greater));
-  EXPECT_TRUE(Identity(weak_ordering::greater >= 0));
-  EXPECT_TRUE(Identity(0 <= weak_ordering::greater));
-  const weak_ordering values[] = {
-      weak_ordering::less, weak_ordering::equivalent, weak_ordering::greater};
-  for (const auto& lhs : values) {
-    for (const auto& rhs : values) {
-      const bool are_equal = &lhs == &rhs;
-      EXPECT_EQ(lhs == rhs, are_equal);
-      EXPECT_EQ(lhs != rhs, !are_equal);
-    }
-  }
-}
-
-TEST(Compare, StrongOrdering) {
-  EXPECT_TRUE(Identity(strong_ordering::less < 0));
-  EXPECT_TRUE(Identity(0 > strong_ordering::less));
-  EXPECT_TRUE(Identity(strong_ordering::less <= 0));
-  EXPECT_TRUE(Identity(0 >= strong_ordering::less));
-  EXPECT_TRUE(Identity(strong_ordering::equal == 0));
-  EXPECT_TRUE(Identity(0 == strong_ordering::equal));
-  EXPECT_TRUE(Identity(strong_ordering::equivalent == 0));
-  EXPECT_TRUE(Identity(0 == strong_ordering::equivalent));
-  EXPECT_TRUE(Identity(strong_ordering::greater > 0));
-  EXPECT_TRUE(Identity(0 < strong_ordering::greater));
-  EXPECT_TRUE(Identity(strong_ordering::greater >= 0));
-  EXPECT_TRUE(Identity(0 <= strong_ordering::greater));
-  const strong_ordering values[] = {
-      strong_ordering::less, strong_ordering::equal, strong_ordering::greater};
-  for (const auto& lhs : values) {
-    for (const auto& rhs : values) {
-      const bool are_equal = &lhs == &rhs;
-      EXPECT_EQ(lhs == rhs, are_equal);
-      EXPECT_EQ(lhs != rhs, !are_equal);
-    }
-  }
-  EXPECT_TRUE(Identity(strong_ordering::equivalent == strong_ordering::equal));
-}
-
-TEST(Compare, Conversions) {
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_equality::equal) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_equality::nonequal) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_equality::equivalent) == 0));
-  EXPECT_TRUE(Identity(
-      implicit_cast<weak_equality>(strong_equality::nonequivalent) != 0));
-
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(partial_ordering::less) != 0));
-  EXPECT_TRUE(Identity(
-      implicit_cast<weak_equality>(partial_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(partial_ordering::greater) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(partial_ordering::unordered) != 0));
-
-  EXPECT_TRUE(implicit_cast<weak_equality>(weak_ordering::less) != 0);
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(weak_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(weak_ordering::greater) != 0));
-
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(weak_ordering::less) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(weak_ordering::less) < 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(weak_ordering::less) <= 0));
-  EXPECT_TRUE(Identity(
-      implicit_cast<partial_ordering>(weak_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(weak_ordering::greater) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(weak_ordering::greater) > 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(weak_ordering::greater) >= 0));
-
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_ordering::less) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_ordering::equal) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_equality>(strong_ordering::greater) != 0));
-
-  EXPECT_TRUE(
-      Identity(implicit_cast<strong_equality>(strong_ordering::less) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<strong_equality>(strong_ordering::equal) == 0));
-  EXPECT_TRUE(Identity(
-      implicit_cast<strong_equality>(strong_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<strong_equality>(strong_ordering::greater) != 0));
-
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::less) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::less) < 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::less) <= 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::equal) == 0));
-  EXPECT_TRUE(Identity(
-      implicit_cast<partial_ordering>(strong_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::greater) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::greater) > 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<partial_ordering>(strong_ordering::greater) >= 0));
-
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::less) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::less) < 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::less) <= 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::equal) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::equivalent) == 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::greater) != 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::greater) > 0));
-  EXPECT_TRUE(
-      Identity(implicit_cast<weak_ordering>(strong_ordering::greater) >= 0));
-}
-
-struct WeakOrderingLess {
-  template <typename T>
-  absl::weak_ordering operator()(const T& a, const T& b) const {
-    return a < b ? absl::weak_ordering::less
-                 : a == b ? absl::weak_ordering::equivalent
-                          : absl::weak_ordering::greater;
-  }
-};
-
-TEST(CompareResultAsLessThan, SanityTest) {
-  EXPECT_FALSE(absl::compare_internal::compare_result_as_less_than(false));
-  EXPECT_TRUE(absl::compare_internal::compare_result_as_less_than(true));
-
-  EXPECT_TRUE(
-      absl::compare_internal::compare_result_as_less_than(weak_ordering::less));
-  EXPECT_FALSE(absl::compare_internal::compare_result_as_less_than(
-      weak_ordering::equivalent));
-  EXPECT_FALSE(absl::compare_internal::compare_result_as_less_than(
-      weak_ordering::greater));
-}
-
-TEST(DoLessThanComparison, SanityTest) {
-  std::less<int> less;
-  WeakOrderingLess weak;
-
-  EXPECT_TRUE(absl::compare_internal::do_less_than_comparison(less, -1, 0));
-  EXPECT_TRUE(absl::compare_internal::do_less_than_comparison(weak, -1, 0));
-
-  EXPECT_FALSE(absl::compare_internal::do_less_than_comparison(less, 10, 10));
-  EXPECT_FALSE(absl::compare_internal::do_less_than_comparison(weak, 10, 10));
-
-  EXPECT_FALSE(absl::compare_internal::do_less_than_comparison(less, 10, 5));
-  EXPECT_FALSE(absl::compare_internal::do_less_than_comparison(weak, 10, 5));
-}
-
-TEST(CompareResultAsOrdering, SanityTest) {
-  EXPECT_TRUE(
-      Identity(absl::compare_internal::compare_result_as_ordering(-1) < 0));
-  EXPECT_FALSE(
-      Identity(absl::compare_internal::compare_result_as_ordering(-1) == 0));
-  EXPECT_FALSE(
-      Identity(absl::compare_internal::compare_result_as_ordering(-1) > 0));
-  EXPECT_TRUE(Identity(absl::compare_internal::compare_result_as_ordering(
-                           weak_ordering::less) < 0));
-  EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
-                            weak_ordering::less) == 0));
-  EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
-                            weak_ordering::less) > 0));
-
-  EXPECT_FALSE(
-      Identity(absl::compare_internal::compare_result_as_ordering(0) < 0));
-  EXPECT_TRUE(
-      Identity(absl::compare_internal::compare_result_as_ordering(0) == 0));
-  EXPECT_FALSE(
-      Identity(absl::compare_internal::compare_result_as_ordering(0) > 0));
-  EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
-                            weak_ordering::equivalent) < 0));
-  EXPECT_TRUE(Identity(absl::compare_internal::compare_result_as_ordering(
-                           weak_ordering::equivalent) == 0));
-  EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
-                            weak_ordering::equivalent) > 0));
-
-  EXPECT_FALSE(
-      Identity(absl::compare_internal::compare_result_as_ordering(1) < 0));
-  EXPECT_FALSE(
-      Identity(absl::compare_internal::compare_result_as_ordering(1) == 0));
-  EXPECT_TRUE(
-      Identity(absl::compare_internal::compare_result_as_ordering(1) > 0));
-  EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
-                            weak_ordering::greater) < 0));
-  EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
-                            weak_ordering::greater) == 0));
-  EXPECT_TRUE(Identity(absl::compare_internal::compare_result_as_ordering(
-                           weak_ordering::greater) > 0));
-}
-
-TEST(DoThreeWayComparison, SanityTest) {
-  std::less<int> less;
-  WeakOrderingLess weak;
-
-  EXPECT_TRUE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, -1, 0) < 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, -1, 0) == 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, -1, 0) > 0));
-  EXPECT_TRUE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, -1, 0) < 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, -1, 0) == 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, -1, 0) > 0));
-
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, 10, 10) < 0));
-  EXPECT_TRUE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, 10, 10) == 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, 10, 10) > 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, 10, 10) < 0));
-  EXPECT_TRUE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, 10, 10) == 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, 10, 10) > 0));
-
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, 10, 5) < 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, 10, 5) == 0));
-  EXPECT_TRUE(Identity(
-      absl::compare_internal::do_three_way_comparison(less, 10, 5) > 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, 10, 5) < 0));
-  EXPECT_FALSE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, 10, 5) == 0));
-  EXPECT_TRUE(Identity(
-      absl::compare_internal::do_three_way_comparison(weak, 10, 5) > 0));
-}
-
-#ifdef __cpp_inline_variables
-TEST(Compare, StaticAsserts) {
-  static_assert(weak_equality::equivalent == 0, "");
-  static_assert(weak_equality::nonequivalent != 0, "");
-
-  static_assert(strong_equality::equal == 0, "");
-  static_assert(strong_equality::nonequal != 0, "");
-  static_assert(strong_equality::equivalent == 0, "");
-  static_assert(strong_equality::nonequivalent != 0, "");
-
-  static_assert(partial_ordering::less < 0, "");
-  static_assert(partial_ordering::equivalent == 0, "");
-  static_assert(partial_ordering::greater > 0, "");
-  static_assert(partial_ordering::unordered != 0, "");
-
-  static_assert(weak_ordering::less < 0, "");
-  static_assert(weak_ordering::equivalent == 0, "");
-  static_assert(weak_ordering::greater > 0, "");
-
-  static_assert(strong_ordering::less < 0, "");
-  static_assert(strong_ordering::equal == 0, "");
-  static_assert(strong_ordering::equivalent == 0, "");
-  static_assert(strong_ordering::greater > 0, "");
-}
-#endif  // __cpp_inline_variables
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/types/internal/conformance_aliases.h b/third_party/abseil/absl/types/internal/conformance_aliases.h
deleted file mode 100644
index 0cc6884..0000000
--- a/third_party/abseil/absl/types/internal/conformance_aliases.h
+++ /dev/null
@@ -1,447 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// regularity_aliases.h
-// -----------------------------------------------------------------------------
-//
-// This file contains type aliases of common ConformanceProfiles and Archetypes
-// so that they can be directly used by name without creating them from scratch.
-
-#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_ALIASES_H_
-#define ABSL_TYPES_INTERNAL_CONFORMANCE_ALIASES_H_
-
-#include "absl/types/internal/conformance_archetype.h"
-#include "absl/types/internal/conformance_profile.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace types_internal {
-
-// Creates both a Profile and a corresponding Archetype with root name "name".
-#define ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(name, ...)                \
-  struct name##Profile : __VA_ARGS__ {};                                    \
-                                                                            \
-  using name##Archetype = ::absl::types_internal::Archetype<name##Profile>; \
-                                                                            \
-  template <class AbslInternalProfileTag>                                   \
-  using name##Archetype##_ = ::absl::types_internal::Archetype<             \
-      ::absl::types_internal::StrongProfileTypedef<name##Profile,           \
-                                                   AbslInternalProfileTag>>
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasTrivialDefaultConstructor,
-    ConformanceProfile<default_constructible::trivial>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowDefaultConstructor,
-    ConformanceProfile<default_constructible::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasDefaultConstructor, ConformanceProfile<default_constructible::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasTrivialMoveConstructor, ConformanceProfile<default_constructible::maybe,
-                                                  move_constructible::trivial>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowMoveConstructor, ConformanceProfile<default_constructible::maybe,
-                                                  move_constructible::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasMoveConstructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasTrivialCopyConstructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::trivial>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowCopyConstructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasCopyConstructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasTrivialMoveAssign,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::trivial>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowMoveAssign,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasMoveAssign,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasTrivialCopyAssign,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::trivial>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowCopyAssign,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasCopyAssign,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasTrivialDestructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::trivial>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowDestructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasDestructor,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowEquality,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasEquality,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowInequality,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::maybe,
-                       inequality_comparable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasInequality,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::maybe, inequality_comparable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowLessThan,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::maybe, inequality_comparable::maybe,
-                       less_than_comparable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasLessThan,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::maybe, inequality_comparable::maybe,
-                       less_than_comparable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowLessEqual,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::maybe, inequality_comparable::maybe,
-                       less_than_comparable::maybe,
-                       less_equal_comparable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasLessEqual,
-    ConformanceProfile<default_constructible::maybe, move_constructible::maybe,
-                       copy_constructible::maybe, move_assignable::maybe,
-                       copy_assignable::maybe, destructible::maybe,
-                       equality_comparable::maybe, inequality_comparable::maybe,
-                       less_than_comparable::maybe,
-                       less_equal_comparable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowGreaterEqual,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasGreaterEqual,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowGreaterThan,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::maybe,
-        greater_than_comparable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasGreaterThan,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::maybe,
-        greater_than_comparable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasNothrowSwap,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::maybe,
-        greater_than_comparable::maybe, swappable::nothrow>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasSwap,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::maybe,
-        greater_than_comparable::maybe, swappable::yes>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HasStdHashSpecialization,
-    ConformanceProfile<
-        default_constructible::maybe, move_constructible::maybe,
-        copy_constructible::maybe, move_assignable::maybe,
-        copy_assignable::maybe, destructible::maybe, equality_comparable::maybe,
-        inequality_comparable::maybe, less_than_comparable::maybe,
-        less_equal_comparable::maybe, greater_equal_comparable::maybe,
-        greater_than_comparable::maybe, swappable::maybe, hashable::yes>);
-
-////////////////////////////////////////////////////////////////////////////////
-////     The remaining aliases are combinations of the previous aliases.    ////
-////////////////////////////////////////////////////////////////////////////////
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    Equatable, CombineProfiles<HasEqualityProfile, HasInequalityProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    Comparable,
-    CombineProfiles<EquatableProfile, HasLessThanProfile, HasLessEqualProfile,
-                    HasGreaterEqualProfile, HasGreaterThanProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    NothrowEquatable,
-    CombineProfiles<HasNothrowEqualityProfile, HasNothrowInequalityProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    NothrowComparable,
-    CombineProfiles<NothrowEquatableProfile, HasNothrowLessThanProfile,
-                    HasNothrowLessEqualProfile, HasNothrowGreaterEqualProfile,
-                    HasNothrowGreaterThanProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    Value,
-    CombineProfiles<HasNothrowMoveConstructorProfile, HasCopyConstructorProfile,
-                    HasNothrowMoveAssignProfile, HasCopyAssignProfile,
-                    HasNothrowDestructorProfile, HasNothrowSwapProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    EquatableValue, CombineProfiles<EquatableProfile, ValueProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    ComparableValue, CombineProfiles<ComparableProfile, ValueProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    DefaultConstructibleValue,
-    CombineProfiles<HasDefaultConstructorProfile, ValueProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    NothrowMoveConstructible, CombineProfiles<HasNothrowMoveConstructorProfile,
-                                              HasNothrowDestructorProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    EquatableNothrowMoveConstructible,
-    CombineProfiles<EquatableProfile, NothrowMoveConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    ComparableNothrowMoveConstructible,
-    CombineProfiles<ComparableProfile, NothrowMoveConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    DefaultConstructibleNothrowMoveConstructible,
-    CombineProfiles<HasDefaultConstructorProfile,
-                    NothrowMoveConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    CopyConstructible,
-    CombineProfiles<HasNothrowMoveConstructorProfile, HasCopyConstructorProfile,
-                    HasNothrowDestructorProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    EquatableCopyConstructible,
-    CombineProfiles<EquatableProfile, CopyConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    ComparableCopyConstructible,
-    CombineProfiles<ComparableProfile, CopyConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    DefaultConstructibleCopyConstructible,
-    CombineProfiles<HasDefaultConstructorProfile, CopyConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    NothrowMovable,
-    CombineProfiles<HasNothrowMoveConstructorProfile,
-                    HasNothrowMoveAssignProfile, HasNothrowDestructorProfile,
-                    HasNothrowSwapProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    EquatableNothrowMovable,
-    CombineProfiles<EquatableProfile, NothrowMovableProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    ComparableNothrowMovable,
-    CombineProfiles<ComparableProfile, NothrowMovableProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    DefaultConstructibleNothrowMovable,
-    CombineProfiles<HasDefaultConstructorProfile, NothrowMovableProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    TrivialSpecialMemberFunctions,
-    CombineProfiles<HasTrivialDefaultConstructorProfile,
-                    HasTrivialMoveConstructorProfile,
-                    HasTrivialCopyConstructorProfile,
-                    HasTrivialMoveAssignProfile, HasTrivialCopyAssignProfile,
-                    HasTrivialDestructorProfile, HasNothrowSwapProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    TriviallyComplete,
-    CombineProfiles<TrivialSpecialMemberFunctionsProfile, ComparableProfile,
-                    HasStdHashSpecializationProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HashableNothrowMoveConstructible,
-    CombineProfiles<HasStdHashSpecializationProfile,
-                    NothrowMoveConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HashableCopyConstructible,
-    CombineProfiles<HasStdHashSpecializationProfile, CopyConstructibleProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HashableNothrowMovable,
-    CombineProfiles<HasStdHashSpecializationProfile, NothrowMovableProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    HashableValue,
-    CombineProfiles<HasStdHashSpecializationProfile, ValueProfile>);
-
-ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS(
-    ComparableHashableValue,
-    CombineProfiles<HashableValueProfile, ComparableProfile>);
-
-// The "preferred" profiles that we support in Abseil.
-template <template <class...> class Receiver>
-using ExpandBasicProfiles =
-    Receiver<NothrowMoveConstructibleProfile, CopyConstructibleProfile,
-             NothrowMovableProfile, ValueProfile>;
-
-// The basic profiles except that they are also all Equatable.
-template <template <class...> class Receiver>
-using ExpandBasicEquatableProfiles =
-    Receiver<EquatableNothrowMoveConstructibleProfile,
-             EquatableCopyConstructibleProfile, EquatableNothrowMovableProfile,
-             EquatableValueProfile>;
-
-// The basic profiles except that they are also all Comparable.
-template <template <class...> class Receiver>
-using ExpandBasicComparableProfiles =
-    Receiver<ComparableNothrowMoveConstructibleProfile,
-             ComparableCopyConstructibleProfile,
-             ComparableNothrowMovableProfile, ComparableValueProfile>;
-
-// The basic profiles except that they are also all Hashable.
-template <template <class...> class Receiver>
-using ExpandBasicHashableProfiles =
-    Receiver<HashableNothrowMoveConstructibleProfile,
-             HashableCopyConstructibleProfile, HashableNothrowMovableProfile,
-             HashableValueProfile>;
-
-// The basic profiles except that they are also all DefaultConstructible.
-template <template <class...> class Receiver>
-using ExpandBasicDefaultConstructibleProfiles =
-    Receiver<DefaultConstructibleNothrowMoveConstructibleProfile,
-             DefaultConstructibleCopyConstructibleProfile,
-             DefaultConstructibleNothrowMovableProfile,
-             DefaultConstructibleValueProfile>;
-
-// The type profiles that we support in Abseil (all of the previous lists).
-template <template <class...> class Receiver>
-using ExpandSupportedProfiles = Receiver<
-    NothrowMoveConstructibleProfile, CopyConstructibleProfile,
-    NothrowMovableProfile, ValueProfile,
-    EquatableNothrowMoveConstructibleProfile, EquatableCopyConstructibleProfile,
-    EquatableNothrowMovableProfile, EquatableValueProfile,
-    ComparableNothrowMoveConstructibleProfile,
-    ComparableCopyConstructibleProfile, ComparableNothrowMovableProfile,
-    ComparableValueProfile, DefaultConstructibleNothrowMoveConstructibleProfile,
-    DefaultConstructibleCopyConstructibleProfile,
-    DefaultConstructibleNothrowMovableProfile, DefaultConstructibleValueProfile,
-    HashableNothrowMoveConstructibleProfile, HashableCopyConstructibleProfile,
-    HashableNothrowMovableProfile, HashableValueProfile>;
-
-// TODO(calabrese) Include types that have throwing move constructors, since in
-// practice we still need to support them because of standard library types with
-// (potentially) non-noexcept moves.
-
-}  // namespace types_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef ABSL_INTERNAL_PROFILE_AND_ARCHETYPE_ALIAS
-
-#endif  // ABSL_TYPES_INTERNAL_CONFORMANCE_ALIASES_H_
diff --git a/third_party/abseil/absl/types/internal/conformance_archetype.h b/third_party/abseil/absl/types/internal/conformance_archetype.h
deleted file mode 100644
index 2349e0f..0000000
--- a/third_party/abseil/absl/types/internal/conformance_archetype.h
+++ /dev/null
@@ -1,978 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// conformance_archetype.h
-// -----------------------------------------------------------------------------
-//
-// This file contains a facility for generating "archetypes" of out of
-// "Conformance Profiles" (see "conformance_profiles.h" for more information
-// about Conformance Profiles). An archetype is a type that aims to support the
-// bare minimum requirements of a given Conformance Profile. For instance, an
-// archetype that corresponds to an ImmutableProfile has exactly a nothrow
-// move-constructor, a potentially-throwing copy constructor, a nothrow
-// destructor, with all other special-member-functions deleted. These archetypes
-// are useful for testing to make sure that templates are able to work with the
-// kinds of types that they claim to support (i.e. that they do not accidentally
-// under-constrain),
-//
-// The main type template in this file is the Archetype template, which takes
-// a Conformance Profile as a template argument and its instantiations are a
-// minimum-conforming model of that profile.
-
-#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_ARCHETYPE_H_
-#define ABSL_TYPES_INTERNAL_CONFORMANCE_ARCHETYPE_H_
-
-#include <cstddef>
-#include <functional>
-#include <type_traits>
-#include <utility>
-
-#include "absl/meta/type_traits.h"
-#include "absl/types/internal/conformance_profile.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace types_internal {
-
-// A minimum-conforming implementation of a type with properties specified in
-// `Prof`, where `Prof` is a valid Conformance Profile.
-template <class Prof, class /*Enabler*/ = void>
-class Archetype;
-
-// Given an Archetype, obtain the properties of the profile associated with that
-// archetype.
-template <class Archetype>
-struct PropertiesOfArchetype;
-
-template <class Prof>
-struct PropertiesOfArchetype<Archetype<Prof>> {
-  using type = PropertiesOfT<Prof>;
-};
-
-template <class Archetype>
-using PropertiesOfArchetypeT = typename PropertiesOfArchetype<Archetype>::type;
-
-// A metafunction to determine if a type is an `Archetype`.
-template <class T>
-struct IsArchetype : std::false_type {};
-
-template <class Prof>
-struct IsArchetype<Archetype<Prof>> : std::true_type {};
-
-// A constructor tag type used when creating an Archetype with internal state.
-struct MakeArchetypeState {};
-
-// Data stored within an archetype that is copied/compared/hashed when the
-// corresponding operations are used.
-using ArchetypeState = std::size_t;
-
-////////////////////////////////////////////////////////////////////////////////
-//   This section of the file defines a chain of base classes for Archetype,  //
-//   where each base defines a specific special member function with the      //
-//   appropriate properties (deleted, noexcept(false), noexcept, or trivial). //
-////////////////////////////////////////////////////////////////////////////////
-
-// The bottom-most base, which contains the state and the default constructor.
-template <default_constructible DefaultConstructibleValue>
-struct ArchetypeStateBase {
-  static_assert(DefaultConstructibleValue == default_constructible::yes ||
-                    DefaultConstructibleValue == default_constructible::nothrow,
-                "");
-
-  ArchetypeStateBase() noexcept(
-      DefaultConstructibleValue ==
-      default_constructible::
-          nothrow) /*Vacuous archetype_state initialization*/ {}
-  explicit ArchetypeStateBase(MakeArchetypeState, ArchetypeState state) noexcept
-      : archetype_state(state) {}
-
-  ArchetypeState archetype_state;
-};
-
-template <>
-struct ArchetypeStateBase<default_constructible::maybe> {
-  explicit ArchetypeStateBase() = delete;
-  explicit ArchetypeStateBase(MakeArchetypeState, ArchetypeState state) noexcept
-      : archetype_state(state) {}
-
-  ArchetypeState archetype_state;
-};
-
-template <>
-struct ArchetypeStateBase<default_constructible::trivial> {
-  ArchetypeStateBase() = default;
-  explicit ArchetypeStateBase(MakeArchetypeState, ArchetypeState state) noexcept
-      : archetype_state(state) {}
-
-  ArchetypeState archetype_state;
-};
-
-// The move-constructor base
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue>
-struct ArchetypeMoveConstructor
-    : ArchetypeStateBase<DefaultConstructibleValue> {
-  static_assert(MoveConstructibleValue == move_constructible::yes ||
-                    MoveConstructibleValue == move_constructible::nothrow,
-                "");
-
-  explicit ArchetypeMoveConstructor(MakeArchetypeState,
-                                    ArchetypeState state) noexcept
-      : ArchetypeStateBase<DefaultConstructibleValue>(MakeArchetypeState(),
-                                                      state) {}
-
-  ArchetypeMoveConstructor() = default;
-  ArchetypeMoveConstructor(ArchetypeMoveConstructor&& other) noexcept(
-      MoveConstructibleValue == move_constructible::nothrow)
-      : ArchetypeStateBase<DefaultConstructibleValue>(MakeArchetypeState(),
-                                                      other.archetype_state) {}
-  ArchetypeMoveConstructor(const ArchetypeMoveConstructor&) = default;
-  ArchetypeMoveConstructor& operator=(ArchetypeMoveConstructor&&) = default;
-  ArchetypeMoveConstructor& operator=(const ArchetypeMoveConstructor&) =
-      default;
-};
-
-template <default_constructible DefaultConstructibleValue>
-struct ArchetypeMoveConstructor<DefaultConstructibleValue,
-                                move_constructible::trivial>
-    : ArchetypeStateBase<DefaultConstructibleValue> {
-  explicit ArchetypeMoveConstructor(MakeArchetypeState,
-                                    ArchetypeState state) noexcept
-      : ArchetypeStateBase<DefaultConstructibleValue>(MakeArchetypeState(),
-                                                      state) {}
-
-  ArchetypeMoveConstructor() = default;
-};
-
-// The copy-constructor base
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue>
-struct ArchetypeCopyConstructor
-    : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                               MoveConstructibleValue> {
-  static_assert(CopyConstructibleValue == copy_constructible::yes ||
-                    CopyConstructibleValue == copy_constructible::nothrow,
-                "");
-  explicit ArchetypeCopyConstructor(MakeArchetypeState,
-                                    ArchetypeState state) noexcept
-      : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                                 MoveConstructibleValue>(MakeArchetypeState(),
-                                                         state) {}
-
-  ArchetypeCopyConstructor() = default;
-  ArchetypeCopyConstructor(ArchetypeCopyConstructor&&) = default;
-  ArchetypeCopyConstructor(const ArchetypeCopyConstructor& other) noexcept(
-      CopyConstructibleValue == copy_constructible::nothrow)
-      : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                                 MoveConstructibleValue>(
-            MakeArchetypeState(), other.archetype_state) {}
-  ArchetypeCopyConstructor& operator=(ArchetypeCopyConstructor&&) = default;
-  ArchetypeCopyConstructor& operator=(const ArchetypeCopyConstructor&) =
-      default;
-};
-
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue>
-struct ArchetypeCopyConstructor<DefaultConstructibleValue,
-                                MoveConstructibleValue,
-                                copy_constructible::maybe>
-    : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                               MoveConstructibleValue> {
-  explicit ArchetypeCopyConstructor(MakeArchetypeState,
-                                    ArchetypeState state) noexcept
-      : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                                 MoveConstructibleValue>(MakeArchetypeState(),
-                                                         state) {}
-
-  ArchetypeCopyConstructor() = default;
-  ArchetypeCopyConstructor(ArchetypeCopyConstructor&&) = default;
-  ArchetypeCopyConstructor(const ArchetypeCopyConstructor&) = delete;
-  ArchetypeCopyConstructor& operator=(ArchetypeCopyConstructor&&) = default;
-  ArchetypeCopyConstructor& operator=(const ArchetypeCopyConstructor&) =
-      default;
-};
-
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue>
-struct ArchetypeCopyConstructor<DefaultConstructibleValue,
-                                MoveConstructibleValue,
-                                copy_constructible::trivial>
-    : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                               MoveConstructibleValue> {
-  explicit ArchetypeCopyConstructor(MakeArchetypeState,
-                                    ArchetypeState state) noexcept
-      : ArchetypeMoveConstructor<DefaultConstructibleValue,
-                                 MoveConstructibleValue>(MakeArchetypeState(),
-                                                         state) {}
-
-  ArchetypeCopyConstructor() = default;
-};
-
-// The move-assign base
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue>
-struct ArchetypeMoveAssign
-    : ArchetypeCopyConstructor<DefaultConstructibleValue,
-                               MoveConstructibleValue, CopyConstructibleValue> {
-  static_assert(MoveAssignableValue == move_assignable::yes ||
-                    MoveAssignableValue == move_assignable::nothrow,
-                "");
-  explicit ArchetypeMoveAssign(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeCopyConstructor<DefaultConstructibleValue,
-                                 MoveConstructibleValue,
-                                 CopyConstructibleValue>(MakeArchetypeState(),
-                                                         state) {}
-
-  ArchetypeMoveAssign() = default;
-  ArchetypeMoveAssign(ArchetypeMoveAssign&&) = default;
-  ArchetypeMoveAssign(const ArchetypeMoveAssign&) = default;
-  ArchetypeMoveAssign& operator=(ArchetypeMoveAssign&& other) noexcept(
-      MoveAssignableValue == move_assignable::nothrow) {
-    this->archetype_state = other.archetype_state;
-    return *this;
-  }
-
-  ArchetypeMoveAssign& operator=(const ArchetypeMoveAssign&) = default;
-};
-
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue>
-struct ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                           CopyConstructibleValue, move_assignable::trivial>
-    : ArchetypeCopyConstructor<DefaultConstructibleValue,
-                               MoveConstructibleValue, CopyConstructibleValue> {
-  explicit ArchetypeMoveAssign(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeCopyConstructor<DefaultConstructibleValue,
-                                 MoveConstructibleValue,
-                                 CopyConstructibleValue>(MakeArchetypeState(),
-                                                         state) {}
-
-  ArchetypeMoveAssign() = default;
-};
-
-// The copy-assign base
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue,
-          copy_assignable CopyAssignableValue>
-struct ArchetypeCopyAssign
-    : ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                          CopyConstructibleValue, MoveAssignableValue> {
-  static_assert(CopyAssignableValue == copy_assignable::yes ||
-                    CopyAssignableValue == copy_assignable::nothrow,
-                "");
-  explicit ArchetypeCopyAssign(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                            CopyConstructibleValue, MoveAssignableValue>(
-            MakeArchetypeState(), state) {}
-
-  ArchetypeCopyAssign() = default;
-  ArchetypeCopyAssign(ArchetypeCopyAssign&&) = default;
-  ArchetypeCopyAssign(const ArchetypeCopyAssign&) = default;
-  ArchetypeCopyAssign& operator=(ArchetypeCopyAssign&&) = default;
-
-  ArchetypeCopyAssign& operator=(const ArchetypeCopyAssign& other) noexcept(
-      CopyAssignableValue == copy_assignable::nothrow) {
-    this->archetype_state = other.archetype_state;
-    return *this;
-  }
-};
-
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue>
-struct ArchetypeCopyAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                           CopyConstructibleValue, MoveAssignableValue,
-                           copy_assignable::maybe>
-    : ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                          CopyConstructibleValue, MoveAssignableValue> {
-  explicit ArchetypeCopyAssign(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                            CopyConstructibleValue, MoveAssignableValue>(
-            MakeArchetypeState(), state) {}
-
-  ArchetypeCopyAssign() = default;
-  ArchetypeCopyAssign(ArchetypeCopyAssign&&) = default;
-  ArchetypeCopyAssign(const ArchetypeCopyAssign&) = default;
-  ArchetypeCopyAssign& operator=(ArchetypeCopyAssign&&) = default;
-  ArchetypeCopyAssign& operator=(const ArchetypeCopyAssign&) = delete;
-};
-
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue>
-struct ArchetypeCopyAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                           CopyConstructibleValue, MoveAssignableValue,
-                           copy_assignable::trivial>
-    : ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                          CopyConstructibleValue, MoveAssignableValue> {
-  explicit ArchetypeCopyAssign(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeMoveAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                            CopyConstructibleValue, MoveAssignableValue>(
-            MakeArchetypeState(), state) {}
-
-  ArchetypeCopyAssign() = default;
-};
-
-// The destructor base
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue,
-          copy_assignable CopyAssignableValue, destructible DestructibleValue>
-struct ArchetypeDestructor
-    : ArchetypeCopyAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                          CopyConstructibleValue, MoveAssignableValue,
-                          CopyAssignableValue> {
-  static_assert(DestructibleValue == destructible::yes ||
-                    DestructibleValue == destructible::nothrow,
-                "");
-
-  explicit ArchetypeDestructor(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeCopyAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                            CopyConstructibleValue, MoveAssignableValue,
-                            CopyAssignableValue>(MakeArchetypeState(), state) {}
-
-  ArchetypeDestructor() = default;
-  ArchetypeDestructor(ArchetypeDestructor&&) = default;
-  ArchetypeDestructor(const ArchetypeDestructor&) = default;
-  ArchetypeDestructor& operator=(ArchetypeDestructor&&) = default;
-  ArchetypeDestructor& operator=(const ArchetypeDestructor&) = default;
-  ~ArchetypeDestructor() noexcept(DestructibleValue == destructible::nothrow) {}
-};
-
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue,
-          copy_assignable CopyAssignableValue>
-struct ArchetypeDestructor<DefaultConstructibleValue, MoveConstructibleValue,
-                           CopyConstructibleValue, MoveAssignableValue,
-                           CopyAssignableValue, destructible::trivial>
-    : ArchetypeCopyAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                          CopyConstructibleValue, MoveAssignableValue,
-                          CopyAssignableValue> {
-  explicit ArchetypeDestructor(MakeArchetypeState,
-                               ArchetypeState state) noexcept
-      : ArchetypeCopyAssign<DefaultConstructibleValue, MoveConstructibleValue,
-                            CopyConstructibleValue, MoveAssignableValue,
-                            CopyAssignableValue>(MakeArchetypeState(), state) {}
-
-  ArchetypeDestructor() = default;
-};
-
-// An alias to the top of the chain of bases for special-member functions.
-// NOTE: move_constructible::maybe, move_assignable::maybe, and
-// destructible::maybe are handled in the top-level type by way of SFINAE.
-// Because of this, we never instantiate the base classes with
-// move_constructible::maybe, move_assignable::maybe, or destructible::maybe so
-// that we minimize the number of different possible type-template
-// instantiations.
-template <default_constructible DefaultConstructibleValue,
-          move_constructible MoveConstructibleValue,
-          copy_constructible CopyConstructibleValue,
-          move_assignable MoveAssignableValue,
-          copy_assignable CopyAssignableValue, destructible DestructibleValue>
-using ArchetypeSpecialMembersBase = ArchetypeDestructor<
-    DefaultConstructibleValue,
-    MoveConstructibleValue != move_constructible::maybe
-        ? MoveConstructibleValue
-        : move_constructible::nothrow,
-    CopyConstructibleValue,
-    MoveAssignableValue != move_assignable::maybe ? MoveAssignableValue
-                                                  : move_assignable::nothrow,
-    CopyAssignableValue,
-    DestructibleValue != destructible::maybe ? DestructibleValue
-                                             : destructible::nothrow>;
-
-// A function that is used to create an archetype with some associated state.
-template <class Arch>
-Arch MakeArchetype(ArchetypeState state) noexcept {
-  static_assert(IsArchetype<Arch>::value,
-                "The explicit template argument to MakeArchetype is required "
-                "to be an Archetype.");
-  return Arch(MakeArchetypeState(), state);
-}
-
-// This is used to conditionally delete "copy" and "move" constructors in a way
-// that is consistent with what the ConformanceProfile requires and that also
-// strictly enforces the arguments to the copy/move to not come from implicit
-// conversions when dealing with the Archetype.
-template <class Prof, class T>
-constexpr bool ShouldDeleteConstructor() {
-  return !((PropertiesOfT<Prof>::move_constructible_support !=
-                move_constructible::maybe &&
-            std::is_same<T, Archetype<Prof>>::value) ||
-           (PropertiesOfT<Prof>::copy_constructible_support !=
-                copy_constructible::maybe &&
-            (std::is_same<T, const Archetype<Prof>&>::value ||
-             std::is_same<T, Archetype<Prof>&>::value ||
-             std::is_same<T, const Archetype<Prof>>::value)));
-}
-
-// This is used to conditionally delete "copy" and "move" assigns in a way
-// that is consistent with what the ConformanceProfile requires and that also
-// strictly enforces the arguments to the copy/move to not come from implicit
-// conversions when dealing with the Archetype.
-template <class Prof, class T>
-constexpr bool ShouldDeleteAssign() {
-  return !(
-      (PropertiesOfT<Prof>::move_assignable_support != move_assignable::maybe &&
-       std::is_same<T, Archetype<Prof>>::value) ||
-      (PropertiesOfT<Prof>::copy_assignable_support != copy_assignable::maybe &&
-       (std::is_same<T, const Archetype<Prof>&>::value ||
-        std::is_same<T, Archetype<Prof>&>::value ||
-        std::is_same<T, const Archetype<Prof>>::value)));
-}
-
-// TODO(calabrese) Inherit from a chain of secondary bases to pull in the
-// associated functions of other concepts.
-template <class Prof, class Enabler>
-class Archetype : ArchetypeSpecialMembersBase<
-                      PropertiesOfT<Prof>::default_constructible_support,
-                      PropertiesOfT<Prof>::move_constructible_support,
-                      PropertiesOfT<Prof>::copy_constructible_support,
-                      PropertiesOfT<Prof>::move_assignable_support,
-                      PropertiesOfT<Prof>::copy_assignable_support,
-                      PropertiesOfT<Prof>::destructible_support> {
-  static_assert(std::is_same<Enabler, void>::value,
-                "An explicit type must not be passed as the second template "
-                "argument to 'Archetype`.");
-
-  // The cases mentioned in these static_asserts are expected to be handled in
-  // the partial template specializations of Archetype that follow this
-  // definition.
-  static_assert(PropertiesOfT<Prof>::destructible_support !=
-                    destructible::maybe,
-                "");
-  static_assert(PropertiesOfT<Prof>::move_constructible_support !=
-                        move_constructible::maybe ||
-                    PropertiesOfT<Prof>::copy_constructible_support ==
-                        copy_constructible::maybe,
-                "");
-  static_assert(PropertiesOfT<Prof>::move_assignable_support !=
-                        move_assignable::maybe ||
-                    PropertiesOfT<Prof>::copy_assignable_support ==
-                        copy_assignable::maybe,
-                "");
-
- public:
-  Archetype() = default;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-template <class Prof>
-class Archetype<Prof, typename std::enable_if<
-                          PropertiesOfT<Prof>::move_constructible_support !=
-                              move_constructible::maybe &&
-                          PropertiesOfT<Prof>::move_assignable_support ==
-                              move_assignable::maybe &&
-                          PropertiesOfT<Prof>::destructible_support !=
-                              destructible::maybe>::type>
-    : ArchetypeSpecialMembersBase<
-          PropertiesOfT<Prof>::default_constructible_support,
-          PropertiesOfT<Prof>::move_constructible_support,
-          PropertiesOfT<Prof>::copy_constructible_support,
-          PropertiesOfT<Prof>::move_assignable_support,
-          PropertiesOfT<Prof>::copy_assignable_support,
-          PropertiesOfT<Prof>::destructible_support> {
- public:
-  Archetype() = default;
-  Archetype(Archetype&&) = default;
-  Archetype(const Archetype&) = default;
-  Archetype& operator=(Archetype&&) = delete;
-  Archetype& operator=(const Archetype&) = default;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-template <class Prof>
-class Archetype<Prof, typename std::enable_if<
-                          PropertiesOfT<Prof>::move_constructible_support ==
-                              move_constructible::maybe &&
-                          PropertiesOfT<Prof>::move_assignable_support ==
-                              move_assignable::maybe &&
-                          PropertiesOfT<Prof>::destructible_support !=
-                              destructible::maybe>::type>
-    : ArchetypeSpecialMembersBase<
-          PropertiesOfT<Prof>::default_constructible_support,
-          PropertiesOfT<Prof>::move_constructible_support,
-          PropertiesOfT<Prof>::copy_constructible_support,
-          PropertiesOfT<Prof>::move_assignable_support,
-          PropertiesOfT<Prof>::copy_assignable_support,
-          PropertiesOfT<Prof>::destructible_support> {
- public:
-  Archetype() = default;
-  Archetype(Archetype&&) = delete;
-  Archetype(const Archetype&) = default;
-  Archetype& operator=(Archetype&&) = delete;
-  Archetype& operator=(const Archetype&) = default;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-template <class Prof>
-class Archetype<Prof, typename std::enable_if<
-                          PropertiesOfT<Prof>::move_constructible_support ==
-                              move_constructible::maybe &&
-                          PropertiesOfT<Prof>::move_assignable_support !=
-                              move_assignable::maybe &&
-                          PropertiesOfT<Prof>::destructible_support !=
-                              destructible::maybe>::type>
-    : ArchetypeSpecialMembersBase<
-          PropertiesOfT<Prof>::default_constructible_support,
-          PropertiesOfT<Prof>::move_constructible_support,
-          PropertiesOfT<Prof>::copy_constructible_support,
-          PropertiesOfT<Prof>::move_assignable_support,
-          PropertiesOfT<Prof>::copy_assignable_support,
-          PropertiesOfT<Prof>::destructible_support> {
- public:
-  Archetype() = default;
-  Archetype(Archetype&&) = delete;
-  Archetype(const Archetype&) = default;
-  Archetype& operator=(Archetype&&) = default;
-  Archetype& operator=(const Archetype&) = default;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-template <class Prof>
-class Archetype<Prof, typename std::enable_if<
-                          PropertiesOfT<Prof>::move_constructible_support !=
-                              move_constructible::maybe &&
-                          PropertiesOfT<Prof>::move_assignable_support ==
-                              move_assignable::maybe &&
-                          PropertiesOfT<Prof>::destructible_support ==
-                              destructible::maybe>::type>
-    : ArchetypeSpecialMembersBase<
-          PropertiesOfT<Prof>::default_constructible_support,
-          PropertiesOfT<Prof>::move_constructible_support,
-          PropertiesOfT<Prof>::copy_constructible_support,
-          PropertiesOfT<Prof>::move_assignable_support,
-          PropertiesOfT<Prof>::copy_assignable_support,
-          PropertiesOfT<Prof>::destructible_support> {
- public:
-  Archetype() = default;
-  Archetype(Archetype&&) = default;
-  Archetype(const Archetype&) = default;
-  Archetype& operator=(Archetype&&) = delete;
-  Archetype& operator=(const Archetype&) = default;
-  ~Archetype() = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-template <class Prof>
-class Archetype<Prof, typename std::enable_if<
-                          PropertiesOfT<Prof>::move_constructible_support ==
-                              move_constructible::maybe &&
-                          PropertiesOfT<Prof>::move_assignable_support ==
-                              move_assignable::maybe &&
-                          PropertiesOfT<Prof>::destructible_support ==
-                              destructible::maybe>::type>
-    : ArchetypeSpecialMembersBase<
-          PropertiesOfT<Prof>::default_constructible_support,
-          PropertiesOfT<Prof>::move_constructible_support,
-          PropertiesOfT<Prof>::copy_constructible_support,
-          PropertiesOfT<Prof>::move_assignable_support,
-          PropertiesOfT<Prof>::copy_assignable_support,
-          PropertiesOfT<Prof>::destructible_support> {
- public:
-  Archetype() = default;
-  Archetype(Archetype&&) = delete;
-  Archetype(const Archetype&) = default;
-  Archetype& operator=(Archetype&&) = delete;
-  Archetype& operator=(const Archetype&) = default;
-  ~Archetype() = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-template <class Prof>
-class Archetype<Prof, typename std::enable_if<
-                          PropertiesOfT<Prof>::move_constructible_support ==
-                              move_constructible::maybe &&
-                          PropertiesOfT<Prof>::move_assignable_support !=
-                              move_assignable::maybe &&
-                          PropertiesOfT<Prof>::destructible_support ==
-                              destructible::maybe>::type>
-    : ArchetypeSpecialMembersBase<
-          PropertiesOfT<Prof>::default_constructible_support,
-          PropertiesOfT<Prof>::move_constructible_support,
-          PropertiesOfT<Prof>::copy_constructible_support,
-          PropertiesOfT<Prof>::move_assignable_support,
-          PropertiesOfT<Prof>::copy_assignable_support,
-          PropertiesOfT<Prof>::destructible_support> {
- public:
-  Archetype() = default;
-  Archetype(Archetype&&) = delete;
-  Archetype(const Archetype&) = default;
-  Archetype& operator=(Archetype&&) = default;
-  Archetype& operator=(const Archetype&) = default;
-  ~Archetype() = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteConstructor<Prof, T>()>::type* = nullptr>
-  Archetype(T&&) = delete;
-
-  // Disallow moves when requested, and disallow implicit conversions.
-  template <class T, typename std::enable_if<
-                         ShouldDeleteAssign<Prof, T>()>::type* = nullptr>
-  Archetype& operator=(T&&) = delete;
-
-  using ArchetypeSpecialMembersBase<
-      PropertiesOfT<Prof>::default_constructible_support,
-      PropertiesOfT<Prof>::move_constructible_support,
-      PropertiesOfT<Prof>::copy_constructible_support,
-      PropertiesOfT<Prof>::move_assignable_support,
-      PropertiesOfT<Prof>::copy_assignable_support,
-      PropertiesOfT<Prof>::destructible_support>::archetype_state;
-
- private:
-  explicit Archetype(MakeArchetypeState, ArchetypeState state) noexcept
-      : ArchetypeSpecialMembersBase<
-            PropertiesOfT<Prof>::default_constructible_support,
-            PropertiesOfT<Prof>::move_constructible_support,
-            PropertiesOfT<Prof>::copy_constructible_support,
-            PropertiesOfT<Prof>::move_assignable_support,
-            PropertiesOfT<Prof>::copy_assignable_support,
-            PropertiesOfT<Prof>::destructible_support>(MakeArchetypeState(),
-                                                       state) {}
-
-  friend Archetype MakeArchetype<Archetype>(ArchetypeState) noexcept;
-};
-
-// Explicitly deleted swap for Archetype if the profile does not require swap.
-// It is important to delete it rather than simply leave it out so that the
-// "using std::swap;" idiom will result in this deleted overload being picked.
-template <class Prof,
-          absl::enable_if_t<!PropertiesOfT<Prof>::is_swappable, int> = 0>
-void swap(Archetype<Prof>&, Archetype<Prof>&) = delete;  // NOLINT
-
-// A conditionally-noexcept swap implementation for Archetype when the profile
-// supports swap.
-template <class Prof,
-          absl::enable_if_t<PropertiesOfT<Prof>::is_swappable, int> = 0>
-void swap(Archetype<Prof>& lhs, Archetype<Prof>& rhs)  // NOLINT
-    noexcept(PropertiesOfT<Prof>::swappable_support != swappable::yes) {
-  std::swap(lhs.archetype_state, rhs.archetype_state);
-}
-
-// A convertible-to-bool type that is used as the return type of comparison
-// operators since the standard doesn't always require exactly bool.
-struct NothrowBool {
-  explicit NothrowBool() = delete;
-  ~NothrowBool() = default;
-
-  // TODO(calabrese) Delete the copy constructor in C++17 mode since guaranteed
-  // elision makes it not required when returning from a function.
-  // NothrowBool(NothrowBool const&) = delete;
-
-  NothrowBool& operator=(NothrowBool const&) = delete;
-
-  explicit operator bool() const noexcept { return value; }
-
-  static NothrowBool make(bool const value) noexcept {
-    return NothrowBool(value);
-  }
-
- private:
-  explicit NothrowBool(bool const value) noexcept : value(value) {}
-
-  bool value;
-};
-
-// A convertible-to-bool type that is used as the return type of comparison
-// operators since the standard doesn't always require exactly bool.
-// Note: ExceptionalBool has a conversion operator that is not noexcept, so
-// that even when a comparison operator is noexcept, that operation may still
-// potentially throw when converted to bool.
-struct ExceptionalBool {
-  explicit ExceptionalBool() = delete;
-  ~ExceptionalBool() = default;
-
-  // TODO(calabrese) Delete the copy constructor in C++17 mode since guaranteed
-  // elision makes it not required when returning from a function.
-  // ExceptionalBool(ExceptionalBool const&) = delete;
-
-  ExceptionalBool& operator=(ExceptionalBool const&) = delete;
-
-  explicit operator bool() const { return value; }  // NOLINT
-
-  static ExceptionalBool make(bool const value) noexcept {
-    return ExceptionalBool(value);
-  }
-
- private:
-  explicit ExceptionalBool(bool const value) noexcept : value(value) {}
-
-  bool value;
-};
-
-// The following macro is only used as a helper in this file to stamp out
-// comparison operator definitions. It is undefined after usage.
-//
-// NOTE: Non-nothrow operators throw via their result's conversion to bool even
-// though the operation itself is noexcept.
-#define ABSL_TYPES_INTERNAL_OP(enum_name, op)                                \
-  template <class Prof>                                                      \
-  absl::enable_if_t<!PropertiesOfT<Prof>::is_##enum_name, bool> operator op( \
-      const Archetype<Prof>&, const Archetype<Prof>&) = delete;              \
-                                                                             \
-  template <class Prof>                                                      \
-  typename absl::enable_if_t<                                                \
-      PropertiesOfT<Prof>::is_##enum_name,                                   \
-      std::conditional<PropertiesOfT<Prof>::enum_name##_support ==           \
-                           enum_name::nothrow,                               \
-                       NothrowBool, ExceptionalBool>>::type                  \
-  operator op(const Archetype<Prof>& lhs,                                    \
-              const Archetype<Prof>& rhs) noexcept {                         \
-    return absl::conditional_t<                                              \
-        PropertiesOfT<Prof>::enum_name##_support == enum_name::nothrow,      \
-        NothrowBool, ExceptionalBool>::make(lhs.archetype_state op           \
-                                                rhs.archetype_state);        \
-  }
-
-ABSL_TYPES_INTERNAL_OP(equality_comparable, ==);
-ABSL_TYPES_INTERNAL_OP(inequality_comparable, !=);
-ABSL_TYPES_INTERNAL_OP(less_than_comparable, <);
-ABSL_TYPES_INTERNAL_OP(less_equal_comparable, <=);
-ABSL_TYPES_INTERNAL_OP(greater_equal_comparable, >=);
-ABSL_TYPES_INTERNAL_OP(greater_than_comparable, >);
-
-#undef ABSL_TYPES_INTERNAL_OP
-
-// Base class for std::hash specializations when an Archetype doesn't support
-// hashing.
-struct PoisonedHash {
-  PoisonedHash() = delete;
-  PoisonedHash(const PoisonedHash&) = delete;
-  PoisonedHash& operator=(const PoisonedHash&) = delete;
-};
-
-// Base class for std::hash specializations when an Archetype supports hashing.
-template <class Prof>
-struct EnabledHash {
-  using argument_type = Archetype<Prof>;
-  using result_type = std::size_t;
-  result_type operator()(const argument_type& arg) const {
-    return std::hash<ArchetypeState>()(arg.archetype_state);
-  }
-};
-
-}  // namespace types_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace std {
-
-template <class Prof>  // NOLINT
-struct hash<::absl::types_internal::Archetype<Prof>>
-    : conditional<::absl::types_internal::PropertiesOfT<Prof>::is_hashable,
-                  ::absl::types_internal::EnabledHash<Prof>,
-                  ::absl::types_internal::PoisonedHash>::type {};
-
-}  // namespace std
-
-#endif  // ABSL_TYPES_INTERNAL_CONFORMANCE_ARCHETYPE_H_
diff --git a/third_party/abseil/absl/types/internal/conformance_profile.h b/third_party/abseil/absl/types/internal/conformance_profile.h
deleted file mode 100644
index cf64ff4..0000000
--- a/third_party/abseil/absl/types/internal/conformance_profile.h
+++ /dev/null
@@ -1,931 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// conformance_profiles.h
-// -----------------------------------------------------------------------------
-//
-// This file contains templates for representing "Regularity Profiles" and
-// concisely-named versions of commonly used Regularity Profiles.
-//
-// A Regularity Profile is a compile-time description of the types of operations
-// that a given type supports, along with properties of those operations when
-// they do exist. For instance, a Regularity Profile may describe a type that
-// has a move-constructor that is noexcept and a copy constructor that is not
-// noexcept. This description can then be examined and passed around to other
-// templates for the purposes of asserting expectations on user-defined types
-// via a series trait checks, or for determining what kinds of run-time tests
-// are able to be performed.
-//
-// Regularity Profiles are also used when creating "archetypes," which are
-// minimum-conforming types that meet all of the requirements of a given
-// Regularity Profile. For more information regarding archetypes, see
-// "conformance_archetypes.h".
-
-#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_PROFILE_H_
-#define ABSL_TYPES_INTERNAL_CONFORMANCE_PROFILE_H_
-
-#include <set>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/algorithm/container.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/internal/conformance_testing_helpers.h"
-#include "absl/utility/utility.h"
-
-// TODO(calabrese) Add support for extending profiles.
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace types_internal {
-
-// Converts an enum to its underlying integral value.
-template <typename Enum>
-constexpr absl::underlying_type_t<Enum> UnderlyingValue(Enum value) {
-  return static_cast<absl::underlying_type_t<Enum>>(value);
-}
-
-// A tag type used in place of a matcher when checking that an assertion result
-// does not actually contain any errors.
-struct NoError {};
-
-// -----------------------------------------------------------------------------
-// ConformanceErrors
-// -----------------------------------------------------------------------------
-class ConformanceErrors {
- public:
-  // Setup the error reporting mechanism by seeding it with the name of the type
-  // that is being tested.
-  explicit ConformanceErrors(std::string type_name)
-      : assertion_result_(false), type_name_(std::move(type_name)) {
-    assertion_result_ << "\n\n"
-                         "Assuming the following type alias:\n"
-                         "\n"
-                         "  using _T = "
-                      << type_name_ << ";\n\n";
-    outputDivider();
-  }
-
-  // Adds the test name to the list of successfully run tests iff it was not
-  // previously reported as failing. This behavior is useful for tests that
-  // have multiple parts, where failures and successes are reported individually
-  // with the same test name.
-  void addTestSuccess(absl::string_view test_name) {
-    auto normalized_test_name = absl::AsciiStrToLower(test_name);
-
-    // If the test is already reported as failing, do not add it to the list of
-    // successes.
-    if (test_failures_.find(normalized_test_name) == test_failures_.end()) {
-      test_successes_.insert(std::move(normalized_test_name));
-    }
-  }
-
-  // Streams a single error description into the internal buffer (a visual
-  // divider is automatically inserted after the error so that multiple errors
-  // are visibly distinct).
-  //
-  // This function increases the error count by 1.
-  //
-  // TODO(calabrese) Determine desired behavior when if this function throws.
-  template <class... P>
-  void addTestFailure(absl::string_view test_name, const P&... args) {
-    // Output a message related to the test failure.
-    assertion_result_ << "\n\n"
-                         "Failed test: "
-                      << test_name << "\n\n";
-    addTestFailureImpl(args...);
-    assertion_result_ << "\n\n";
-    outputDivider();
-
-    auto normalized_test_name = absl::AsciiStrToLower(test_name);
-
-    // If previous parts of this test succeeded, remove it from that set.
-    test_successes_.erase(normalized_test_name);
-
-    // Add the test name to the list of failed tests.
-    test_failures_.insert(std::move(normalized_test_name));
-
-    has_error_ = true;
-  }
-
-  // Convert this object into a testing::AssertionResult instance such that it
-  // can be used with gtest.
-  ::testing::AssertionResult assertionResult() const {
-    return has_error_ ? assertion_result_ : ::testing::AssertionSuccess();
-  }
-
-  // Convert this object into a testing::AssertionResult instance such that it
-  // can be used with gtest. This overload expects errors, using the specified
-  // matcher.
-  ::testing::AssertionResult expectFailedTests(
-      const std::set<std::string>& test_names) const {
-    // Since we are expecting nonconformance, output an error message when the
-    // type actually conformed to the specified profile.
-    if (!has_error_) {
-      return ::testing::AssertionFailure()
-             << "Unexpected conformance of type:\n"
-                "    "
-             << type_name_ << "\n\n";
-    }
-
-    // Get a list of all expected failures that did not actually fail
-    // (or that were not run).
-    std::vector<std::string> nonfailing_tests;
-    absl::c_set_difference(test_names, test_failures_,
-                           std::back_inserter(nonfailing_tests));
-
-    // Get a list of all "expected failures" that were never actually run.
-    std::vector<std::string> unrun_tests;
-    absl::c_set_difference(nonfailing_tests, test_successes_,
-                           std::back_inserter(unrun_tests));
-
-    // Report when the user specified tests that were not run.
-    if (!unrun_tests.empty()) {
-      const bool tests_were_run =
-          !(test_failures_.empty() && test_successes_.empty());
-
-      // Prepare an assertion result used in the case that tests pass that were
-      // expected to fail.
-      ::testing::AssertionResult result = ::testing::AssertionFailure();
-      result << "When testing type:\n    " << type_name_
-             << "\n\nThe following tests were expected to fail but were not "
-                "run";
-
-      if (tests_were_run) result << " (was the test name spelled correctly?)";
-
-      result << ":\n\n";
-
-      // List all of the tests that unexpectedly passed.
-      for (const auto& test_name : unrun_tests) {
-        result << "    " << test_name << "\n";
-      }
-
-      if (!tests_were_run) result << "\nNo tests were run.";
-
-      if (!test_failures_.empty()) {
-        // List test failures
-        result << "\nThe tests that were run and failed are:\n\n";
-        for (const auto& test_name : test_failures_) {
-          result << "    " << test_name << "\n";
-        }
-      }
-
-      if (!test_successes_.empty()) {
-        // List test successes
-        result << "\nThe tests that were run and succeeded are:\n\n";
-        for (const auto& test_name : test_successes_) {
-          result << "    " << test_name << "\n";
-        }
-      }
-
-      return result;
-    }
-
-    // If some tests passed when they were expected to fail, alert the caller.
-    if (nonfailing_tests.empty()) return ::testing::AssertionSuccess();
-
-    // Prepare an assertion result used in the case that tests pass that were
-    // expected to fail.
-    ::testing::AssertionResult unexpected_successes =
-        ::testing::AssertionFailure();
-    unexpected_successes << "When testing type:\n    " << type_name_
-                         << "\n\nThe following tests passed when they were "
-                            "expected to fail:\n\n";
-
-    // List all of the tests that unexpectedly passed.
-    for (const auto& test_name : nonfailing_tests) {
-      unexpected_successes << "    " << test_name << "\n";
-    }
-
-    return unexpected_successes;
-  }
-
- private:
-  void outputDivider() {
-    assertion_result_ << "========================================";
-  }
-
-  void addTestFailureImpl() {}
-
-  template <class H, class... T>
-  void addTestFailureImpl(const H& head, const T&... tail) {
-    assertion_result_ << head;
-    addTestFailureImpl(tail...);
-  }
-
-  ::testing::AssertionResult assertion_result_;
-  std::set<std::string> test_failures_;
-  std::set<std::string> test_successes_;
-  std::string type_name_;
-  bool has_error_ = false;
-};
-
-template <class T, class /*Enabler*/ = void>
-struct PropertiesOfImpl {};
-
-template <class T>
-struct PropertiesOfImpl<T, absl::void_t<typename T::properties>> {
-  using type = typename T::properties;
-};
-
-template <class T>
-struct PropertiesOfImpl<T, absl::void_t<typename T::profile_alias_of>> {
-  using type = typename PropertiesOfImpl<typename T::profile_alias_of>::type;
-};
-
-template <class T>
-struct PropertiesOf : PropertiesOfImpl<T> {};
-
-template <class T>
-using PropertiesOfT = typename PropertiesOf<T>::type;
-
-// NOTE: These enums use this naming convention to be consistent with the
-// standard trait names, which is useful since it allows us to match up each
-// enum name with a corresponding trait name in macro definitions.
-
-// An enum that describes the various expectations on an operations existence.
-enum class function_support { maybe, yes, nothrow, trivial };
-
-constexpr const char* PessimisticPropertyDescription(function_support v) {
-  return v == function_support::maybe
-             ? "no"
-             : v == function_support::yes
-                   ? "yes, potentially throwing"
-                   : v == function_support::nothrow ? "yes, nothrow"
-                                                    : "yes, trivial";
-}
-
-// Return a string that describes the kind of property support that was
-// expected.
-inline std::string ExpectedFunctionKindList(function_support min,
-                                            function_support max) {
-  if (min == max) {
-    std::string result =
-        absl::StrCat("Expected:\n  ",
-                     PessimisticPropertyDescription(
-                         static_cast<function_support>(UnderlyingValue(min))),
-                     "\n");
-    return result;
-  }
-
-  std::string result = "Expected one of:\n";
-  for (auto curr_support = UnderlyingValue(min);
-       curr_support <= UnderlyingValue(max); ++curr_support) {
-    absl::StrAppend(&result, "  ",
-                    PessimisticPropertyDescription(
-                        static_cast<function_support>(curr_support)),
-                    "\n");
-  }
-
-  return result;
-}
-
-template <class Enum>
-void ExpectModelOfImpl(ConformanceErrors* errors, Enum min_support,
-                       Enum max_support, Enum kind) {
-  const auto kind_value = UnderlyingValue(kind);
-  const auto min_support_value = UnderlyingValue(min_support);
-  const auto max_support_value = UnderlyingValue(max_support);
-
-  if (!(kind_value >= min_support_value && kind_value <= max_support_value)) {
-    errors->addTestFailure(
-        PropertyName(kind), "**Failed property expectation**\n\n",
-        ExpectedFunctionKindList(
-            static_cast<function_support>(min_support_value),
-            static_cast<function_support>(max_support_value)),
-        '\n', "Actual:\n  ",
-        PessimisticPropertyDescription(
-            static_cast<function_support>(kind_value)));
-  } else {
-    errors->addTestSuccess(PropertyName(kind));
-  }
-}
-
-#define ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(description, name) \
-  enum class name { maybe, yes, nothrow, trivial };                   \
-                                                                      \
-  constexpr const char* PropertyName(name v) { return description; }  \
-  static_assert(true, "")  // Force a semicolon when using this macro.
-
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for default construction",
-                                           default_constructible);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for move construction",
-                                           move_constructible);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for copy construction",
-                                           copy_constructible);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for move assignment",
-                                           move_assignable);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for copy assignment",
-                                           copy_assignable);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for destruction",
-                                           destructible);
-
-#undef ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM
-
-#define ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(description, name)     \
-  enum class name { maybe, yes, nothrow };                           \
-                                                                     \
-  constexpr const char* PropertyName(name v) { return description; } \
-  static_assert(true, "")  // Force a semicolon when using this macro.
-
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for ==", equality_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for !=", inequality_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for <", less_than_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for <=", less_equal_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for >=",
-                                      greater_equal_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for >", greater_than_comparable);
-
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for swap", swappable);
-
-#undef ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM
-
-enum class hashable { maybe, yes };
-
-constexpr const char* PropertyName(hashable v) {
-  return "support for std::hash";
-}
-
-template <class T>
-using AlwaysFalse = std::false_type;
-
-#define ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(name, property)   \
-  template <class T>                                                        \
-  constexpr property property##_support_of() {                              \
-    return std::is_##property<T>::value                                     \
-               ? std::is_nothrow_##property<T>::value                       \
-                     ? absl::is_trivially_##property<T>::value              \
-                           ? property::trivial                              \
-                           : property::nothrow                              \
-                     : property::yes                                        \
-               : property::maybe;                                           \
-  }                                                                         \
-                                                                            \
-  template <class T, class MinProf, class MaxProf>                          \
-  void ExpectModelOf##name(ConformanceErrors* errors) {                     \
-    (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::property##_support, \
-                        PropertiesOfT<MaxProf>::property##_support,         \
-                        property##_support_of<T>());                        \
-  }
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(DefaultConstructible,
-                                                  default_constructible);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(MoveConstructible,
-                                                  move_constructible);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(CopyConstructible,
-                                                  copy_constructible);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(MoveAssignable,
-                                                  move_assignable);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(CopyAssignable,
-                                                  copy_assignable);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(Destructible, destructible);
-
-#undef ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER
-
-void BoolFunction(bool) noexcept;
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction for checking if an operation exists through SFINAE.
-//
-// `T` is the type to test and Op is an alias containing the expression to test.
-template <class T, template <class...> class Op, class = void>
-struct IsOpableImpl : std::false_type {};
-
-template <class T, template <class...> class Op>
-struct IsOpableImpl<T, Op, absl::void_t<Op<T>>> : std::true_type {};
-
-template <template <class...> class Op>
-struct IsOpable {
-  template <class T>
-  using apply = typename IsOpableImpl<T, Op>::type;
-};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction for checking if an operation exists and is also noexcept
-// through SFINAE and the noexcept operator.
-///
-// `T` is the type to test and Op is an alias containing the expression to test.
-template <class T, template <class...> class Op, class = void>
-struct IsNothrowOpableImpl : std::false_type {};
-
-template <class T, template <class...> class Op>
-struct IsNothrowOpableImpl<T, Op, absl::enable_if_t<Op<T>::value>>
-    : std::true_type {};
-
-template <template <class...> class Op>
-struct IsNothrowOpable {
-  template <class T>
-  using apply = typename IsNothrowOpableImpl<T, Op>::type;
-};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A macro that produces the necessary function for reporting what kind of
-// support a specific comparison operation has and a function for reporting an
-// error if a given type's support for that operation does not meet the expected
-// requirements.
-#define ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(name, property, op)      \
-  template <class T,                                                           \
-            class Result = std::integral_constant<                             \
-                bool, noexcept((BoolFunction)(std::declval<const T&>() op      \
-                                                  std::declval<const T&>()))>> \
-  using name = Result;                                                         \
-                                                                               \
-  template <class T>                                                           \
-  constexpr property property##_support_of() {                                 \
-    return IsOpable<name>::apply<T>::value                                     \
-               ? IsNothrowOpable<name>::apply<T>::value ? property::nothrow    \
-                                                        : property::yes        \
-               : property::maybe;                                              \
-  }                                                                            \
-                                                                               \
-  template <class T, class MinProf, class MaxProf>                             \
-  void ExpectModelOf##name(ConformanceErrors* errors) {                        \
-    (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::property##_support,    \
-                        PropertiesOfT<MaxProf>::property##_support,            \
-                        property##_support_of<T>());                           \
-  }
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// Generate the necessary support-checking and error reporting functions for
-// each of the comparison operators.
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(EqualityComparable,
-                                              equality_comparable, ==);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(InequalityComparable,
-                                              inequality_comparable, !=);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(LessThanComparable,
-                                              less_than_comparable, <);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(LessEqualComparable,
-                                              less_equal_comparable, <=);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(GreaterEqualComparable,
-                                              greater_equal_comparable, >=);
-
-ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(GreaterThanComparable,
-                                              greater_than_comparable, >);
-
-#undef ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// The necessary support-checking and error-reporting functions for swap.
-template <class T>
-constexpr swappable swappable_support_of() {
-  return type_traits_internal::IsSwappable<T>::value
-             ? type_traits_internal::IsNothrowSwappable<T>::value
-                   ? swappable::nothrow
-                   : swappable::yes
-             : swappable::maybe;
-}
-
-template <class T, class MinProf, class MaxProf>
-void ExpectModelOfSwappable(ConformanceErrors* errors) {
-  (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::swappable_support,
-                      PropertiesOfT<MaxProf>::swappable_support,
-                      swappable_support_of<T>());
-}
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// The necessary support-checking and error-reporting functions for std::hash.
-template <class T>
-constexpr hashable hashable_support_of() {
-  return type_traits_internal::IsHashable<T>::value ? hashable::yes
-                                                    : hashable::maybe;
-}
-
-template <class T, class MinProf, class MaxProf>
-void ExpectModelOfHashable(ConformanceErrors* errors) {
-  (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::hashable_support,
-                      PropertiesOfT<MaxProf>::hashable_support,
-                      hashable_support_of<T>());
-}
-//
-////////////////////////////////////////////////////////////////////////////////
-
-template <
-    default_constructible DefaultConstructibleValue =
-        default_constructible::maybe,
-    move_constructible MoveConstructibleValue = move_constructible::maybe,
-    copy_constructible CopyConstructibleValue = copy_constructible::maybe,
-    move_assignable MoveAssignableValue = move_assignable::maybe,
-    copy_assignable CopyAssignableValue = copy_assignable::maybe,
-    destructible DestructibleValue = destructible::maybe,
-    equality_comparable EqualityComparableValue = equality_comparable::maybe,
-    inequality_comparable InequalityComparableValue =
-        inequality_comparable::maybe,
-    less_than_comparable LessThanComparableValue = less_than_comparable::maybe,
-    less_equal_comparable LessEqualComparableValue =
-        less_equal_comparable::maybe,
-    greater_equal_comparable GreaterEqualComparableValue =
-        greater_equal_comparable::maybe,
-    greater_than_comparable GreaterThanComparableValue =
-        greater_than_comparable::maybe,
-    swappable SwappableValue = swappable::maybe,
-    hashable HashableValue = hashable::maybe>
-struct ConformanceProfile {
-  using properties = ConformanceProfile;
-
-  static constexpr default_constructible
-      default_constructible_support =  // NOLINT
-      DefaultConstructibleValue;
-
-  static constexpr move_constructible move_constructible_support =  // NOLINT
-      MoveConstructibleValue;
-
-  static constexpr copy_constructible copy_constructible_support =  // NOLINT
-      CopyConstructibleValue;
-
-  static constexpr move_assignable move_assignable_support =  // NOLINT
-      MoveAssignableValue;
-
-  static constexpr copy_assignable copy_assignable_support =  // NOLINT
-      CopyAssignableValue;
-
-  static constexpr destructible destructible_support =  // NOLINT
-      DestructibleValue;
-
-  static constexpr equality_comparable equality_comparable_support =  // NOLINT
-      EqualityComparableValue;
-
-  static constexpr inequality_comparable
-      inequality_comparable_support =  // NOLINT
-      InequalityComparableValue;
-
-  static constexpr less_than_comparable
-      less_than_comparable_support =  // NOLINT
-      LessThanComparableValue;
-
-  static constexpr less_equal_comparable
-      less_equal_comparable_support =  // NOLINT
-      LessEqualComparableValue;
-
-  static constexpr greater_equal_comparable
-      greater_equal_comparable_support =  // NOLINT
-      GreaterEqualComparableValue;
-
-  static constexpr greater_than_comparable
-      greater_than_comparable_support =  // NOLINT
-      GreaterThanComparableValue;
-
-  static constexpr swappable swappable_support = SwappableValue;  // NOLINT
-
-  static constexpr hashable hashable_support = HashableValue;  // NOLINT
-
-  static constexpr bool is_default_constructible =  // NOLINT
-      DefaultConstructibleValue != default_constructible::maybe;
-
-  static constexpr bool is_move_constructible =  // NOLINT
-      MoveConstructibleValue != move_constructible::maybe;
-
-  static constexpr bool is_copy_constructible =  // NOLINT
-      CopyConstructibleValue != copy_constructible::maybe;
-
-  static constexpr bool is_move_assignable =  // NOLINT
-      MoveAssignableValue != move_assignable::maybe;
-
-  static constexpr bool is_copy_assignable =  // NOLINT
-      CopyAssignableValue != copy_assignable::maybe;
-
-  static constexpr bool is_destructible =  // NOLINT
-      DestructibleValue != destructible::maybe;
-
-  static constexpr bool is_equality_comparable =  // NOLINT
-      EqualityComparableValue != equality_comparable::maybe;
-
-  static constexpr bool is_inequality_comparable =  // NOLINT
-      InequalityComparableValue != inequality_comparable::maybe;
-
-  static constexpr bool is_less_than_comparable =  // NOLINT
-      LessThanComparableValue != less_than_comparable::maybe;
-
-  static constexpr bool is_less_equal_comparable =  // NOLINT
-      LessEqualComparableValue != less_equal_comparable::maybe;
-
-  static constexpr bool is_greater_equal_comparable =  // NOLINT
-      GreaterEqualComparableValue != greater_equal_comparable::maybe;
-
-  static constexpr bool is_greater_than_comparable =  // NOLINT
-      GreaterThanComparableValue != greater_than_comparable::maybe;
-
-  static constexpr bool is_swappable =  // NOLINT
-      SwappableValue != swappable::maybe;
-
-  static constexpr bool is_hashable =  // NOLINT
-      HashableValue != hashable::maybe;
-};
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// Compliant SFINAE-friendliness is not always present on the standard library
-// implementations that we support. This helper-struct (and associated enum) is
-// used as a means to conditionally check the hashability support of a type.
-enum class CheckHashability { no, yes };
-
-template <class T, CheckHashability ShouldCheckHashability>
-struct conservative_hashable_support_of;
-
-template <class T>
-struct conservative_hashable_support_of<T, CheckHashability::no> {
-  static constexpr hashable Invoke() { return hashable::maybe; }
-};
-
-template <class T>
-struct conservative_hashable_support_of<T, CheckHashability::yes> {
-  static constexpr hashable Invoke() { return hashable_support_of<T>(); }
-};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// The ConformanceProfile that is expected based on introspection into the type
-// by way of trait checks.
-template <class T, CheckHashability ShouldCheckHashability>
-struct SyntacticConformanceProfileOf {
-  using properties = ConformanceProfile<
-      default_constructible_support_of<T>(), move_constructible_support_of<T>(),
-      copy_constructible_support_of<T>(), move_assignable_support_of<T>(),
-      copy_assignable_support_of<T>(), destructible_support_of<T>(),
-      equality_comparable_support_of<T>(),
-      inequality_comparable_support_of<T>(),
-      less_than_comparable_support_of<T>(),
-      less_equal_comparable_support_of<T>(),
-      greater_equal_comparable_support_of<T>(),
-      greater_than_comparable_support_of<T>(), swappable_support_of<T>(),
-      conservative_hashable_support_of<T, ShouldCheckHashability>::Invoke()>;
-};
-
-#define ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL(type, name)     \
-  template <default_constructible DefaultConstructibleValue,                   \
-            move_constructible MoveConstructibleValue,                         \
-            copy_constructible CopyConstructibleValue,                         \
-            move_assignable MoveAssignableValue,                               \
-            copy_assignable CopyAssignableValue,                               \
-            destructible DestructibleValue,                                    \
-            equality_comparable EqualityComparableValue,                       \
-            inequality_comparable InequalityComparableValue,                   \
-            less_than_comparable LessThanComparableValue,                      \
-            less_equal_comparable LessEqualComparableValue,                    \
-            greater_equal_comparable GreaterEqualComparableValue,              \
-            greater_than_comparable GreaterThanComparableValue,                \
-            swappable SwappableValue, hashable HashableValue>                  \
-  constexpr type ConformanceProfile<                                           \
-      DefaultConstructibleValue, MoveConstructibleValue,                       \
-      CopyConstructibleValue, MoveAssignableValue, CopyAssignableValue,        \
-      DestructibleValue, EqualityComparableValue, InequalityComparableValue,   \
-      LessThanComparableValue, LessEqualComparableValue,                       \
-      GreaterEqualComparableValue, GreaterThanComparableValue, SwappableValue, \
-      HashableValue>::name
-
-#define ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(type)           \
-  ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL(type,            \
-                                                         type##_support); \
-  ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL(bool, is_##type)
-
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(default_constructible);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(move_constructible);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(copy_constructible);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(move_assignable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(copy_assignable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(destructible);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(equality_comparable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(inequality_comparable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(less_than_comparable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(less_equal_comparable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(greater_equal_comparable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(greater_than_comparable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(swappable);
-ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(hashable);
-
-#undef ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF
-#undef ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL
-
-// Retrieve the enum with the minimum underlying value.
-// Note: std::min is not constexpr in C++11, which is why this is necessary.
-template <class H>
-constexpr H MinEnum(H head) {
-  return head;
-}
-
-template <class H, class N, class... T>
-constexpr H MinEnum(H head, N next, T... tail) {
-  return (UnderlyingValue)(head) < (UnderlyingValue)(next)
-             ? (MinEnum)(head, tail...)
-             : (MinEnum)(next, tail...);
-}
-
-template <class... Profs>
-struct MinimalProfiles {
-  static constexpr default_constructible
-      default_constructible_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::default_constructible_support...);
-
-  static constexpr move_constructible move_constructible_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::move_constructible_support...);
-
-  static constexpr copy_constructible copy_constructible_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::copy_constructible_support...);
-
-  static constexpr move_assignable move_assignable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::move_assignable_support...);
-
-  static constexpr copy_assignable copy_assignable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::copy_assignable_support...);
-
-  static constexpr destructible destructible_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::destructible_support...);
-
-  static constexpr equality_comparable equality_comparable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::equality_comparable_support...);
-
-  static constexpr inequality_comparable
-      inequality_comparable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::inequality_comparable_support...);
-
-  static constexpr less_than_comparable
-      less_than_comparable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::less_than_comparable_support...);
-
-  static constexpr less_equal_comparable
-      less_equal_comparable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::less_equal_comparable_support...);
-
-  static constexpr greater_equal_comparable
-      greater_equal_comparable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::greater_equal_comparable_support...);
-
-  static constexpr greater_than_comparable
-      greater_than_comparable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::greater_than_comparable_support...);
-
-  static constexpr swappable swappable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::swappable_support...);
-
-  static constexpr hashable hashable_support =  // NOLINT
-      (MinEnum)(PropertiesOfT<Profs>::hashable_support...);
-
-  using properties = ConformanceProfile<
-      default_constructible_support, move_constructible_support,
-      copy_constructible_support, move_assignable_support,
-      copy_assignable_support, destructible_support,
-      equality_comparable_support, inequality_comparable_support,
-      less_than_comparable_support, less_equal_comparable_support,
-      greater_equal_comparable_support, greater_than_comparable_support,
-      swappable_support, hashable_support>;
-};
-
-// Retrieve the enum with the greatest underlying value.
-// Note: std::max is not constexpr in C++11, which is why this is necessary.
-template <class H>
-constexpr H MaxEnum(H head) {
-  return head;
-}
-
-template <class H, class N, class... T>
-constexpr H MaxEnum(H head, N next, T... tail) {
-  return (UnderlyingValue)(next) < (UnderlyingValue)(head)
-             ? (MaxEnum)(head, tail...)
-             : (MaxEnum)(next, tail...);
-}
-
-template <class... Profs>
-struct CombineProfilesImpl {
-  static constexpr default_constructible
-      default_constructible_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::default_constructible_support...);
-
-  static constexpr move_constructible move_constructible_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::move_constructible_support...);
-
-  static constexpr copy_constructible copy_constructible_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::copy_constructible_support...);
-
-  static constexpr move_assignable move_assignable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::move_assignable_support...);
-
-  static constexpr copy_assignable copy_assignable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::copy_assignable_support...);
-
-  static constexpr destructible destructible_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::destructible_support...);
-
-  static constexpr equality_comparable equality_comparable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::equality_comparable_support...);
-
-  static constexpr inequality_comparable
-      inequality_comparable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::inequality_comparable_support...);
-
-  static constexpr less_than_comparable
-      less_than_comparable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::less_than_comparable_support...);
-
-  static constexpr less_equal_comparable
-      less_equal_comparable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::less_equal_comparable_support...);
-
-  static constexpr greater_equal_comparable
-      greater_equal_comparable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::greater_equal_comparable_support...);
-
-  static constexpr greater_than_comparable
-      greater_than_comparable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::greater_than_comparable_support...);
-
-  static constexpr swappable swappable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::swappable_support...);
-
-  static constexpr hashable hashable_support =  // NOLINT
-      (MaxEnum)(PropertiesOfT<Profs>::hashable_support...);
-
-  using properties = ConformanceProfile<
-      default_constructible_support, move_constructible_support,
-      copy_constructible_support, move_assignable_support,
-      copy_assignable_support, destructible_support,
-      equality_comparable_support, inequality_comparable_support,
-      less_than_comparable_support, less_equal_comparable_support,
-      greater_equal_comparable_support, greater_than_comparable_support,
-      swappable_support, hashable_support>;
-};
-
-// NOTE: We use this as opposed to a direct alias of CombineProfilesImpl so that
-// when named aliases of CombineProfiles are created (such as in
-// conformance_aliases.h), we only pay for the combination algorithm on the
-// profiles that are actually used.
-template <class... Profs>
-struct CombineProfiles {
-  using profile_alias_of = CombineProfilesImpl<Profs...>;
-};
-
-template <>
-struct CombineProfiles<> {
-  using properties = ConformanceProfile<>;
-};
-
-template <class Profile, class Tag>
-struct StrongProfileTypedef {
-  using properties = PropertiesOfT<Profile>;
-};
-
-template <class T, class /*Enabler*/ = void>
-struct IsProfileImpl : std::false_type {};
-
-template <class T>
-struct IsProfileImpl<T, absl::void_t<PropertiesOfT<T>>> : std::true_type {};
-
-template <class T>
-struct IsProfile : IsProfileImpl<T>::type {};
-
-// A tag that describes which set of properties we will check when the user
-// requires a strict match in conformance (as opposed to a loose match which
-// allows more-refined support of any given operation).
-//
-// Currently only the RegularityDomain exists and it includes all operations
-// that the conformance testing suite knows about. The intent is that if the
-// suite is expanded to support extension, such as for checking conformance of
-// concepts like Iterators or Containers, additional corresponding domains can
-// be created.
-struct RegularityDomain {};
-
-}  // namespace types_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TYPES_INTERNAL_CONFORMANCE_PROFILE_H_
diff --git a/third_party/abseil/absl/types/internal/conformance_testing.h b/third_party/abseil/absl/types/internal/conformance_testing.h
deleted file mode 100644
index 487b0f7..0000000
--- a/third_party/abseil/absl/types/internal/conformance_testing.h
+++ /dev/null
@@ -1,1386 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// conformance_testing.h
-// -----------------------------------------------------------------------------
-//
-
-#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_H_
-#define ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_H_
-
-////////////////////////////////////////////////////////////////////////////////
-//                                                                            //
-// Many templates in this file take a `T` and a `Prof` type as explicit       //
-// template arguments. These are a type to be checked and a                   //
-// "Regularity Profile" that describes what operations that type `T` is       //
-// expected to support. See "regularity_profiles.h" for more details          //
-// regarding Regularity Profiles.                                             //
-//                                                                            //
-////////////////////////////////////////////////////////////////////////////////
-
-#include <cstddef>
-#include <set>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/ascii.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/internal/conformance_aliases.h"
-#include "absl/types/internal/conformance_archetype.h"
-#include "absl/types/internal/conformance_profile.h"
-#include "absl/types/internal/conformance_testing_helpers.h"
-#include "absl/types/internal/parentheses.h"
-#include "absl/types/internal/transform_args.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace types_internal {
-
-// Returns true if the compiler incorrectly greedily instantiates constexpr
-// templates in any unevaluated context.
-constexpr bool constexpr_instantiation_when_unevaluated() {
-#if defined(__apple_build_version__)  // TODO(calabrese) Make more specific
-  return true;
-#elif defined(__clang__)
-  return __clang_major__ < 4;
-#elif defined(__GNUC__)
-  // TODO(calabrese) Figure out why gcc 7 fails (seems like a different bug)
-  return __GNUC__ < 5 || (__GNUC__ == 5 && __GNUC_MINOR__ < 2) || __GNUC__ >= 7;
-#else
-  return false;
-#endif
-}
-
-// Returns true if the standard library being used incorrectly produces an error
-// when instantiating the definition of a poisoned std::hash specialization.
-constexpr bool poisoned_hash_fails_instantiation() {
-#if defined(_MSC_VER) && !defined(_LIBCPP_VERSION)
-  return _MSC_VER < 1914;
-#else
-  return false;
-#endif
-}
-
-template <class Fun>
-struct GeneratorType {
-  decltype(std::declval<const Fun&>()()) operator()() const
-      noexcept(noexcept(std::declval<const Fun&>()())) {
-    return fun();
-  }
-
-  Fun fun;
-  const char* description;
-};
-
-// A "make" function for the GeneratorType template that deduces the function
-// object type.
-template <class Fun,
-          absl::enable_if_t<IsNullaryCallable<Fun>::value>** = nullptr>
-GeneratorType<Fun> Generator(Fun fun, const char* description) {
-  return GeneratorType<Fun>{absl::move(fun), description};
-}
-
-// A type that contains a set of nullary function objects that each return an
-// instance of the same type and value (though possibly different
-// representations, such as +0 and -0 or two vectors with the same elements but
-// with different capacities).
-template <class... Funs>
-struct EquivalenceClassType {
-  std::tuple<GeneratorType<Funs>...> generators;
-};
-
-// A "make" function for the EquivalenceClassType template that deduces the
-// function object types and is constrained such that a user can only pass in
-// function objects that all have the same return type.
-template <class... Funs, absl::enable_if_t<AreGeneratorsWithTheSameReturnType<
-                             Funs...>::value>** = nullptr>
-EquivalenceClassType<Funs...> EquivalenceClass(GeneratorType<Funs>... funs) {
-  return {std::make_tuple(absl::move(funs)...)};
-}
-
-// A type that contains an ordered series of EquivalenceClassTypes, from
-// smallest value to largest value.
-template <class... EqClasses>
-struct OrderedEquivalenceClasses {
-  std::tuple<EqClasses...> eq_classes;
-};
-
-// An object containing the parts of a given (name, initialization expression),
-// and is capable of generating a string that describes the given.
-struct GivenDeclaration {
-  std::string outputDeclaration(std::size_t width) const {
-    const std::size_t indent_size = 2;
-    std::string result = absl::StrCat("  ", name);
-
-    if (!expression.empty()) {
-      // Indent
-      result.resize(indent_size + width, ' ');
-      absl::StrAppend(&result, " = ", expression, ";\n");
-    } else {
-      absl::StrAppend(&result, ";\n");
-    }
-
-    return result;
-  }
-
-  std::string name;
-  std::string expression;
-};
-
-// Produce a string that contains all of the givens of an error report.
-template <class... Decls>
-std::string PrepareGivenContext(const Decls&... decls) {
-  const std::size_t width = (std::max)({decls.name.size()...});
-  return absl::StrCat("Given:\n", decls.outputDeclaration(width)..., "\n");
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Function objects that perform a check for each comparison operator         //
-////////////////////////////////////////////////////////////////////////////////
-
-#define ABSL_INTERNAL_EXPECT_OP(name, op)                                   \
-  struct Expect##name {                                                     \
-    template <class T>                                                      \
-    void operator()(absl::string_view test_name, absl::string_view context, \
-                    const T& lhs, const T& rhs, absl::string_view lhs_name, \
-                    absl::string_view rhs_name) const {                     \
-      if (!static_cast<bool>(lhs op rhs)) {                                 \
-        errors->addTestFailure(                                             \
-            test_name, absl::StrCat(context,                                \
-                                    "**Unexpected comparison result**\n"    \
-                                    "\n"                                    \
-                                    "Expression:\n"                         \
-                                    "  ",                                   \
-                                    lhs_name, " " #op " ", rhs_name,        \
-                                    "\n"                                    \
-                                    "\n"                                    \
-                                    "Expected: true\n"                      \
-                                    "  Actual: false"));                    \
-      } else {                                                              \
-        errors->addTestSuccess(test_name);                                  \
-      }                                                                     \
-    }                                                                       \
-                                                                            \
-    ConformanceErrors* errors;                                              \
-  };                                                                        \
-                                                                            \
-  struct ExpectNot##name {                                                  \
-    template <class T>                                                      \
-    void operator()(absl::string_view test_name, absl::string_view context, \
-                    const T& lhs, const T& rhs, absl::string_view lhs_name, \
-                    absl::string_view rhs_name) const {                     \
-      if (lhs op rhs) {                                                     \
-        errors->addTestFailure(                                             \
-            test_name, absl::StrCat(context,                                \
-                                    "**Unexpected comparison result**\n"    \
-                                    "\n"                                    \
-                                    "Expression:\n"                         \
-                                    "  ",                                   \
-                                    lhs_name, " " #op " ", rhs_name,        \
-                                    "\n"                                    \
-                                    "\n"                                    \
-                                    "Expected: false\n"                     \
-                                    "  Actual: true"));                     \
-      } else {                                                              \
-        errors->addTestSuccess(test_name);                                  \
-      }                                                                     \
-    }                                                                       \
-                                                                            \
-    ConformanceErrors* errors;                                              \
-  }
-
-ABSL_INTERNAL_EXPECT_OP(Eq, ==);
-ABSL_INTERNAL_EXPECT_OP(Ne, !=);
-ABSL_INTERNAL_EXPECT_OP(Lt, <);
-ABSL_INTERNAL_EXPECT_OP(Le, <=);
-ABSL_INTERNAL_EXPECT_OP(Ge, >=);
-ABSL_INTERNAL_EXPECT_OP(Gt, >);
-
-#undef ABSL_INTERNAL_EXPECT_OP
-
-// A function object that verifies that two objects hash to the same value by
-// way of the std::hash specialization.
-struct ExpectSameHash {
-  template <class T>
-  void operator()(absl::string_view test_name, absl::string_view context,
-                  const T& lhs, const T& rhs, absl::string_view lhs_name,
-                  absl::string_view rhs_name) const {
-    if (std::hash<T>()(lhs) != std::hash<T>()(rhs)) {
-      errors->addTestFailure(
-          test_name, absl::StrCat(context,
-                                  "**Unexpected hash result**\n"
-                                  "\n"
-                                  "Expression:\n"
-                                  "  std::hash<T>()(",
-                                  lhs_name, ") == std::hash<T>()(", rhs_name,
-                                  ")\n"
-                                  "\n"
-                                  "Expected: true\n"
-                                  "  Actual: false"));
-    } else {
-      errors->addTestSuccess(test_name);
-    }
-  }
-
-  ConformanceErrors* errors;
-};
-
-// A function template that takes two objects and verifies that each comparison
-// operator behaves in a way that is consistent with equality. It has "OneWay"
-// in the name because the first argument will always be the left-hand operand
-// of the corresponding comparison operator and the second argument will
-// always be the right-hand operand. It will never switch that order.
-// At a higher level in the test suite, the one-way form is called once for each
-// of the two possible orders whenever lhs and rhs are not the same initializer.
-template <class T, class Prof>
-void ExpectOneWayEquality(ConformanceErrors* errors,
-                          absl::string_view test_name,
-                          absl::string_view context, const T& lhs, const T& rhs,
-                          absl::string_view lhs_name,
-                          absl::string_view rhs_name) {
-  If<PropertiesOfT<Prof>::is_equality_comparable>::Invoke(
-      ExpectEq{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-
-  If<PropertiesOfT<Prof>::is_inequality_comparable>::Invoke(
-      ExpectNotNe{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-
-  If<PropertiesOfT<Prof>::is_less_than_comparable>::Invoke(
-      ExpectNotLt{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-
-  If<PropertiesOfT<Prof>::is_less_equal_comparable>::Invoke(
-      ExpectLe{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-
-  If<PropertiesOfT<Prof>::is_greater_equal_comparable>::Invoke(
-      ExpectGe{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-
-  If<PropertiesOfT<Prof>::is_greater_than_comparable>::Invoke(
-      ExpectNotGt{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-
-  If<PropertiesOfT<Prof>::is_hashable>::Invoke(
-      ExpectSameHash{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
-}
-
-// A function template that takes two objects and verifies that each comparison
-// operator behaves in a way that is consistent with equality. This function
-// differs from ExpectOneWayEquality in that this will do checks with argument
-// order reversed in addition to in-order.
-template <class T, class Prof>
-void ExpectEquality(ConformanceErrors* errors, absl::string_view test_name,
-                    absl::string_view context, const T& lhs, const T& rhs,
-                    absl::string_view lhs_name, absl::string_view rhs_name) {
-  (ExpectOneWayEquality<T, Prof>)(errors, test_name, context, lhs, rhs,
-                                  lhs_name, rhs_name);
-  (ExpectOneWayEquality<T, Prof>)(errors, test_name, context, rhs, lhs,
-                                  rhs_name, lhs_name);
-}
-
-// Given a generator, makes sure that a generated value and a moved-from
-// generated value are equal.
-template <class T, class Prof>
-struct ExpectMoveConstructOneGenerator {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T object = generator();
-    const T moved_object = absl::move(generator());  // Force no elision.
-
-    (ExpectEquality<T, Prof>)(errors, "Move construction",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T object",
-                                                   generator.description},
-                                  GivenDeclaration{"const _T moved_object",
-                                                   std::string("std::move(") +
-                                                       generator.description +
-                                                       ")"}),
-                              object, moved_object, "object", "moved_object");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Given a generator, makes sure that a generated value and a copied-from
-// generated value are equal.
-template <class T, class Prof>
-struct ExpectCopyConstructOneGenerator {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T object = generator();
-    const T copied_object = static_cast<const T&>(generator());
-
-    (ExpectEquality<T, Prof>)(errors, "Copy construction",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T object",
-                                                   generator.description},
-                                  GivenDeclaration{
-                                      "const _T copied_object",
-                                      std::string("static_cast<const _T&>(") +
-                                          generator.description + ")"}),
-                              object, copied_object, "object", "copied_object");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Default-construct and do nothing before destruction.
-//
-// This is useful in exercising the codepath of default construction followed by
-// destruction, but does not explicitly test anything. An example of where this
-// might fail is a default destructor that default-initializes a scalar and a
-// destructor reads the value of that member. Sanitizers can catch this as long
-// as our test attempts to execute such a case.
-template <class T>
-struct ExpectDefaultConstructWithDestruct {
-  void operator()() const {
-    // Scoped so that destructor gets called before reporting success.
-    {
-      T object;
-      static_cast<void>(object);
-    }
-
-    errors->addTestSuccess("Default construction");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Check move-assign into a default-constructed object.
-template <class T, class Prof>
-struct ExpectDefaultConstructWithMoveAssign {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T source_of_truth = generator();
-    T object;
-    object = generator();
-
-    (ExpectEquality<T, Prof>)(errors, "Move assignment",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T object",
-                                                   generator.description},
-                                  GivenDeclaration{"_T object", ""},
-                                  GivenDeclaration{"object",
-                                                   generator.description}),
-                              object, source_of_truth, "std::as_const(object)",
-                              "source_of_truth");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Check copy-assign into a default-constructed object.
-template <class T, class Prof>
-struct ExpectDefaultConstructWithCopyAssign {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T source_of_truth = generator();
-    T object;
-    object = static_cast<const T&>(generator());
-
-    (ExpectEquality<T, Prof>)(errors, "Copy assignment",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T source_of_truth",
-                                                   generator.description},
-                                  GivenDeclaration{"_T object", ""},
-                                  GivenDeclaration{
-                                      "object",
-                                      std::string("static_cast<const _T&>(") +
-                                          generator.description + ")"}),
-                              object, source_of_truth, "std::as_const(object)",
-                              "source_of_truth");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Perform a self move-assign.
-template <class T, class Prof>
-struct ExpectSelfMoveAssign {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    T object = generator();
-    object = absl::move(object);
-
-    // NOTE: Self move-assign results in a valid-but-unspecified state.
-
-    (ExpectEquality<T, Prof>)(errors, "Move assignment",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"_T object",
-                                                   generator.description},
-                                  GivenDeclaration{"object",
-                                                   "std::move(object)"}),
-                              object, object, "object", "object");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Perform a self copy-assign.
-template <class T, class Prof>
-struct ExpectSelfCopyAssign {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T source_of_truth = generator();
-    T object = generator();
-    const T& const_object = object;
-    object = const_object;
-
-    (ExpectEquality<T, Prof>)(errors, "Copy assignment",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T source_of_truth",
-                                                   generator.description},
-                                  GivenDeclaration{"_T object",
-                                                   generator.description},
-                                  GivenDeclaration{"object",
-                                                   "std::as_const(object)"}),
-                              const_object, source_of_truth,
-                              "std::as_const(object)", "source_of_truth");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Perform a self-swap.
-template <class T, class Prof>
-struct ExpectSelfSwap {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T source_of_truth = generator();
-    T object = generator();
-
-    type_traits_internal::Swap(object, object);
-
-    std::string preliminary_info = absl::StrCat(
-        PrepareGivenContext(
-            GivenDeclaration{"const _T source_of_truth", generator.description},
-            GivenDeclaration{"_T object", generator.description}),
-        "After performing a self-swap:\n"
-        "  using std::swap;\n"
-        "  swap(object, object);\n"
-        "\n");
-
-    (ExpectEquality<T, Prof>)(errors, "Swap", std::move(preliminary_info),
-                              object, source_of_truth, "std::as_const(object)",
-                              "source_of_truth");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Perform each of the single-generator checks when necessary operations are
-// supported.
-template <class T, class Prof>
-struct ExpectSelfComparison {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    const T object = generator();
-    (ExpectOneWayEquality<T, Prof>)(errors, "Comparison",
-                                    PrepareGivenContext(GivenDeclaration{
-                                        "const _T object",
-                                        generator.description}),
-                                    object, object, "object", "object");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Perform each of the single-generator checks when necessary operations are
-// supported.
-template <class T, class Prof>
-struct ExpectConsistency {
-  template <class Fun>
-  void operator()(const Fun& generator) const {
-    If<PropertiesOfT<Prof>::is_move_constructible>::Invoke(
-        ExpectMoveConstructOneGenerator<T, Prof>{errors}, generator);
-
-    If<PropertiesOfT<Prof>::is_copy_constructible>::Invoke(
-        ExpectCopyConstructOneGenerator<T, Prof>{errors}, generator);
-
-    If<PropertiesOfT<Prof>::is_default_constructible &&
-       PropertiesOfT<Prof>::is_move_assignable>::
-        Invoke(ExpectDefaultConstructWithMoveAssign<T, Prof>{errors},
-               generator);
-
-    If<PropertiesOfT<Prof>::is_default_constructible &&
-       PropertiesOfT<Prof>::is_copy_assignable>::
-        Invoke(ExpectDefaultConstructWithCopyAssign<T, Prof>{errors},
-               generator);
-
-    If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
-        ExpectSelfMoveAssign<T, Prof>{errors}, generator);
-
-    If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
-        ExpectSelfCopyAssign<T, Prof>{errors}, generator);
-
-    If<PropertiesOfT<Prof>::is_swappable>::Invoke(
-        ExpectSelfSwap<T, Prof>{errors}, generator);
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Check move-assign with two different values.
-template <class T, class Prof>
-struct ExpectMoveAssign {
-  template <class Fun0, class Fun1>
-  void operator()(const Fun0& generator0, const Fun1& generator1) const {
-    const T source_of_truth1 = generator1();
-    T object = generator0();
-    object = generator1();
-
-    (ExpectEquality<T, Prof>)(errors, "Move assignment",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T source_of_truth1",
-                                                   generator1.description},
-                                  GivenDeclaration{"_T object",
-                                                   generator0.description},
-                                  GivenDeclaration{"object",
-                                                   generator1.description}),
-                              object, source_of_truth1, "std::as_const(object)",
-                              "source_of_truth1");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Check copy-assign with two different values.
-template <class T, class Prof>
-struct ExpectCopyAssign {
-  template <class Fun0, class Fun1>
-  void operator()(const Fun0& generator0, const Fun1& generator1) const {
-    const T source_of_truth1 = generator1();
-    T object = generator0();
-    object = static_cast<const T&>(generator1());
-
-    (ExpectEquality<T, Prof>)(errors, "Copy assignment",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T source_of_truth1",
-                                                   generator1.description},
-                                  GivenDeclaration{"_T object",
-                                                   generator0.description},
-                                  GivenDeclaration{
-                                      "object",
-                                      std::string("static_cast<const _T&>(") +
-                                          generator1.description + ")"}),
-                              object, source_of_truth1, "std::as_const(object)",
-                              "source_of_truth1");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Check swap with two different values.
-template <class T, class Prof>
-struct ExpectSwap {
-  template <class Fun0, class Fun1>
-  void operator()(const Fun0& generator0, const Fun1& generator1) const {
-    const T source_of_truth0 = generator0();
-    const T source_of_truth1 = generator1();
-    T object0 = generator0();
-    T object1 = generator1();
-
-    type_traits_internal::Swap(object0, object1);
-
-    const std::string context =
-        PrepareGivenContext(
-            GivenDeclaration{"const _T source_of_truth0",
-                             generator0.description},
-            GivenDeclaration{"const _T source_of_truth1",
-                             generator1.description},
-            GivenDeclaration{"_T object0", generator0.description},
-            GivenDeclaration{"_T object1", generator1.description}) +
-        "After performing a swap:\n"
-        "  using std::swap;\n"
-        "  swap(object0, object1);\n"
-        "\n";
-
-    (ExpectEquality<T, Prof>)(errors, "Swap", context, object0,
-                              source_of_truth1, "std::as_const(object0)",
-                              "source_of_truth1");
-    (ExpectEquality<T, Prof>)(errors, "Swap", context, object1,
-                              source_of_truth0, "std::as_const(object1)",
-                              "source_of_truth0");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Validate that `generator0` and `generator1` produce values that are equal.
-template <class T, class Prof>
-struct ExpectEquivalenceClassComparison {
-  template <class Fun0, class Fun1>
-  void operator()(const Fun0& generator0, const Fun1& generator1) const {
-    const T object0 = generator0();
-    const T object1 = generator1();
-
-    (ExpectEquality<T, Prof>)(errors, "Comparison",
-                              PrepareGivenContext(
-                                  GivenDeclaration{"const _T object0",
-                                                   generator0.description},
-                                  GivenDeclaration{"const _T object1",
-                                                   generator1.description}),
-                              object0, object1, "object0", "object1");
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Validate that all objects in the same equivalence-class have the same value.
-template <class T, class Prof>
-struct ExpectEquivalenceClassConsistency {
-  template <class Fun0, class Fun1>
-  void operator()(const Fun0& generator0, const Fun1& generator1) const {
-    If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
-        ExpectMoveAssign<T, Prof>{errors}, generator0, generator1);
-
-    If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
-        ExpectCopyAssign<T, Prof>{errors}, generator0, generator1);
-
-    If<PropertiesOfT<Prof>::is_swappable>::Invoke(ExpectSwap<T, Prof>{errors},
-                                                  generator0, generator1);
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Given a "lesser" object and a "greater" object, perform every combination of
-// comparison operators supported for the type, expecting consistent results.
-template <class T, class Prof>
-void ExpectOrdered(ConformanceErrors* errors, absl::string_view context,
-                   const T& small, const T& big, absl::string_view small_name,
-                   absl::string_view big_name) {
-  const absl::string_view test_name = "Comparison";
-
-  If<PropertiesOfT<Prof>::is_equality_comparable>::Invoke(
-      ExpectNotEq{errors}, test_name, context, small, big, small_name,
-      big_name);
-  If<PropertiesOfT<Prof>::is_equality_comparable>::Invoke(
-      ExpectNotEq{errors}, test_name, context, big, small, big_name,
-      small_name);
-
-  If<PropertiesOfT<Prof>::is_inequality_comparable>::Invoke(
-      ExpectNe{errors}, test_name, context, small, big, small_name, big_name);
-  If<PropertiesOfT<Prof>::is_inequality_comparable>::Invoke(
-      ExpectNe{errors}, test_name, context, big, small, big_name, small_name);
-
-  If<PropertiesOfT<Prof>::is_less_than_comparable>::Invoke(
-      ExpectLt{errors}, test_name, context, small, big, small_name, big_name);
-  If<PropertiesOfT<Prof>::is_less_than_comparable>::Invoke(
-      ExpectNotLt{errors}, test_name, context, big, small, big_name,
-      small_name);
-
-  If<PropertiesOfT<Prof>::is_less_equal_comparable>::Invoke(
-      ExpectLe{errors}, test_name, context, small, big, small_name, big_name);
-  If<PropertiesOfT<Prof>::is_less_equal_comparable>::Invoke(
-      ExpectNotLe{errors}, test_name, context, big, small, big_name,
-      small_name);
-
-  If<PropertiesOfT<Prof>::is_greater_equal_comparable>::Invoke(
-      ExpectNotGe{errors}, test_name, context, small, big, small_name,
-      big_name);
-  If<PropertiesOfT<Prof>::is_greater_equal_comparable>::Invoke(
-      ExpectGe{errors}, test_name, context, big, small, big_name, small_name);
-
-  If<PropertiesOfT<Prof>::is_greater_than_comparable>::Invoke(
-      ExpectNotGt{errors}, test_name, context, small, big, small_name,
-      big_name);
-  If<PropertiesOfT<Prof>::is_greater_than_comparable>::Invoke(
-      ExpectGt{errors}, test_name, context, big, small, big_name, small_name);
-}
-
-// For every two elements of an equivalence class, makes sure that those two
-// elements compare equal, including checks with the same argument passed as
-// both operands.
-template <class T, class Prof>
-struct ExpectEquivalenceClassComparisons {
-  template <class... Funs>
-  void operator()(EquivalenceClassType<Funs...> eq_class) const {
-    (ForEachTupleElement)(ExpectSelfComparison<T, Prof>{errors},
-                          eq_class.generators);
-
-    (ForEveryTwo)(ExpectEquivalenceClassComparison<T, Prof>{errors},
-                  eq_class.generators);
-  }
-
-  ConformanceErrors* errors;
-};
-
-// For every element of an equivalence class, makes sure that the element is
-// self-consistent (in other words, if any of move/copy/swap are defined,
-// perform those operations and make such that results and operands still
-// compare equal to known values whenever it is required for that operation.
-template <class T, class Prof>
-struct ExpectEquivalenceClass {
-  template <class... Funs>
-  void operator()(EquivalenceClassType<Funs...> eq_class) const {
-    (ForEachTupleElement)(ExpectConsistency<T, Prof>{errors},
-                          eq_class.generators);
-
-    (ForEveryTwo)(ExpectEquivalenceClassConsistency<T, Prof>{errors},
-                  eq_class.generators);
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Validate that the passed-in argument is a generator of a greater value than
-// the one produced by the "small_gen" datamember with respect to all of the
-// comparison operators that Prof requires, with both argument orders to test.
-template <class T, class Prof, class SmallGenerator>
-struct ExpectBiggerGeneratorThanComparisons {
-  template <class BigGenerator>
-  void operator()(BigGenerator big_gen) const {
-    const T small = small_gen();
-    const T big = big_gen();
-
-    (ExpectOrdered<T, Prof>)(errors,
-                             PrepareGivenContext(
-                                 GivenDeclaration{"const _T small",
-                                                  small_gen.description},
-                                 GivenDeclaration{"const _T big",
-                                                  big_gen.description}),
-                             small, big, "small", "big");
-  }
-
-  SmallGenerator small_gen;
-  ConformanceErrors* errors;
-};
-
-// Perform all of the move, copy, and swap checks on the value generated by
-// `small_gen` and the value generated by `big_gen`.
-template <class T, class Prof, class SmallGenerator>
-struct ExpectBiggerGeneratorThan {
-  template <class BigGenerator>
-  void operator()(BigGenerator big_gen) const {
-    If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
-        ExpectMoveAssign<T, Prof>{errors}, small_gen, big_gen);
-    If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
-        ExpectMoveAssign<T, Prof>{errors}, big_gen, small_gen);
-
-    If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
-        ExpectCopyAssign<T, Prof>{errors}, small_gen, big_gen);
-    If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
-        ExpectCopyAssign<T, Prof>{errors}, big_gen, small_gen);
-
-    If<PropertiesOfT<Prof>::is_swappable>::Invoke(ExpectSwap<T, Prof>{errors},
-                                                  small_gen, big_gen);
-  }
-
-  SmallGenerator small_gen;
-  ConformanceErrors* errors;
-};
-
-// Validate that the result of a generator is greater than the results of all
-// generators in an equivalence class with respect to comparisons.
-template <class T, class Prof, class SmallGenerator>
-struct ExpectBiggerGeneratorThanEqClassesComparisons {
-  template <class BigEqClass>
-  void operator()(BigEqClass big_eq_class) const {
-    (ForEachTupleElement)(
-        ExpectBiggerGeneratorThanComparisons<T, Prof, SmallGenerator>{small_gen,
-                                                                      errors},
-        big_eq_class.generators);
-  }
-
-  SmallGenerator small_gen;
-  ConformanceErrors* errors;
-};
-
-// Validate that the non-comparison binary operations required by Prof are
-// correct for the result of each generator of big_eq_class and a generator of
-// the logically smaller value returned by small_gen.
-template <class T, class Prof, class SmallGenerator>
-struct ExpectBiggerGeneratorThanEqClasses {
-  template <class BigEqClass>
-  void operator()(BigEqClass big_eq_class) const {
-    (ForEachTupleElement)(
-        ExpectBiggerGeneratorThan<T, Prof, SmallGenerator>{small_gen, errors},
-        big_eq_class.generators);
-  }
-
-  SmallGenerator small_gen;
-  ConformanceErrors* errors;
-};
-
-// Validate that each equivalence class that is passed is logically less than
-// the equivalence classes that comes later on in the argument list.
-template <class T, class Prof>
-struct ExpectOrderedEquivalenceClassesComparisons {
-  template <class... BigEqClasses>
-  struct Impl {
-    // Validate that the value produced by `small_gen` is less than all of the
-    // values generated by those of the logically larger equivalence classes.
-    template <class SmallGenerator>
-    void operator()(SmallGenerator small_gen) const {
-      (ForEachTupleElement)(ExpectBiggerGeneratorThanEqClassesComparisons<
-                                T, Prof, SmallGenerator>{small_gen, errors},
-                            big_eq_classes);
-    }
-
-    std::tuple<BigEqClasses...> big_eq_classes;
-    ConformanceErrors* errors;
-  };
-
-  // When given no equivalence classes, no validation is necessary.
-  void operator()() const {}
-
-  template <class SmallEqClass, class... BigEqClasses>
-  void operator()(SmallEqClass small_eq_class,
-                  BigEqClasses... big_eq_classes) const {
-    // For each generator in the first equivalence class, make sure that it is
-    // less than each of those in the logically greater equivalence classes.
-    (ForEachTupleElement)(
-        Impl<BigEqClasses...>{std::make_tuple(absl::move(big_eq_classes)...),
-                              errors},
-        small_eq_class.generators);
-
-    // Recurse so that all equivalence class combinations are checked.
-    (*this)(absl::move(big_eq_classes)...);
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Validate that the non-comparison binary operations required by Prof are
-// correct for the result of each generator of big_eq_classes and a generator of
-// the logically smaller value returned by small_gen.
-template <class T, class Prof>
-struct ExpectOrderedEquivalenceClasses {
-  template <class... BigEqClasses>
-  struct Impl {
-    template <class SmallGenerator>
-    void operator()(SmallGenerator small_gen) const {
-      (ForEachTupleElement)(
-          ExpectBiggerGeneratorThanEqClasses<T, Prof, SmallGenerator>{small_gen,
-                                                                      errors},
-          big_eq_classes);
-    }
-
-    std::tuple<BigEqClasses...> big_eq_classes;
-    ConformanceErrors* errors;
-  };
-
-  // Check that small_eq_class is logically consistent and also is logically
-  // less than all values in big_eq_classes.
-  template <class SmallEqClass, class... BigEqClasses>
-  void operator()(SmallEqClass small_eq_class,
-                  BigEqClasses... big_eq_classes) const {
-    (ForEachTupleElement)(
-        Impl<BigEqClasses...>{std::make_tuple(absl::move(big_eq_classes)...),
-                              errors},
-        small_eq_class.generators);
-
-    (*this)(absl::move(big_eq_classes)...);
-  }
-
-  // Terminating case of operator().
-  void operator()() const {}
-
-  ConformanceErrors* errors;
-};
-
-// Validate that a type meets the syntactic requirements of std::hash if the
-// range of profiles requires it.
-template <class T, class MinProf, class MaxProf>
-struct ExpectHashable {
-  void operator()() const {
-    ExpectModelOfHashable<T, MinProf, MaxProf>(errors);
-  }
-
-  ConformanceErrors* errors;
-};
-
-// Validate that the type `T` meets all of the requirements associated with
-// `MinProf` and without going beyond the syntactic properties of `MaxProf`.
-template <class T, class MinProf, class MaxProf>
-struct ExpectModels {
-  void operator()(ConformanceErrors* errors) const {
-    ExpectModelOfDefaultConstructible<T, MinProf, MaxProf>(errors);
-    ExpectModelOfMoveConstructible<T, MinProf, MaxProf>(errors);
-    ExpectModelOfCopyConstructible<T, MinProf, MaxProf>(errors);
-    ExpectModelOfMoveAssignable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfCopyAssignable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfDestructible<T, MinProf, MaxProf>(errors);
-    ExpectModelOfEqualityComparable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfInequalityComparable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfLessThanComparable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfLessEqualComparable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfGreaterEqualComparable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfGreaterThanComparable<T, MinProf, MaxProf>(errors);
-    ExpectModelOfSwappable<T, MinProf, MaxProf>(errors);
-
-    // Only check hashability on compilers that have a compliant default-hash.
-    If<!poisoned_hash_fails_instantiation()>::Invoke(
-        ExpectHashable<T, MinProf, MaxProf>{errors});
-  }
-};
-
-// A metafunction that yields a Profile matching the set of properties that are
-// safe to be checked (lack-of-hashability is only checked on standard library
-// implementations that are standards compliant in that they provide a std::hash
-// primary template that is SFINAE-friendly)
-template <class LogicalProf, class T>
-struct MinimalCheckableProfile {
-  using type =
-      MinimalProfiles<PropertiesOfT<LogicalProf>,
-                      PropertiesOfT<SyntacticConformanceProfileOf<
-                          T, !PropertiesOfT<LogicalProf>::is_hashable &&
-                                     poisoned_hash_fails_instantiation()
-                                 ? CheckHashability::no
-                                 : CheckHashability::yes>>>;
-};
-
-// An identity metafunction
-template <class T>
-struct Always {
-  using type = T;
-};
-
-// Validate the T meets all of the necessary requirements of LogicalProf, with
-// syntactic requirements defined by the profile range [MinProf, MaxProf].
-template <class T, class LogicalProf, class MinProf, class MaxProf,
-          class... EqClasses>
-ConformanceErrors ExpectRegularityImpl(
-    OrderedEquivalenceClasses<EqClasses...> vals) {
-  ConformanceErrors errors((NameOf<T>()));
-
-  If<!constexpr_instantiation_when_unevaluated()>::Invoke(
-      ExpectModels<T, MinProf, MaxProf>(), &errors);
-
-  using minimal_profile = typename absl::conditional_t<
-      constexpr_instantiation_when_unevaluated(), Always<LogicalProf>,
-      MinimalCheckableProfile<LogicalProf, T>>::type;
-
-  If<PropertiesOfT<minimal_profile>::is_default_constructible>::Invoke(
-      ExpectDefaultConstructWithDestruct<T>{&errors});
-
-  //////////////////////////////////////////////////////////////////////////////
-  // Perform all comparison checks first, since later checks depend on their
-  // correctness.
-  //
-  // Check all of the comparisons for all values in the same equivalence
-  // class (equal with respect to comparison operators and hash the same).
-  (ForEachTupleElement)(
-      ExpectEquivalenceClassComparisons<T, minimal_profile>{&errors},
-      vals.eq_classes);
-
-  // Check all of the comparisons for each combination of values that are in
-  // different equivalence classes (not equal with respect to comparison
-  // operators).
-  absl::apply(
-      ExpectOrderedEquivalenceClassesComparisons<T, minimal_profile>{&errors},
-      vals.eq_classes);
-  //
-  //////////////////////////////////////////////////////////////////////////////
-
-  // Perform remaining checks, relying on comparisons.
-  // TODO(calabrese) short circuit if any comparisons above failed.
-  (ForEachTupleElement)(ExpectEquivalenceClass<T, minimal_profile>{&errors},
-                        vals.eq_classes);
-
-  absl::apply(ExpectOrderedEquivalenceClasses<T, minimal_profile>{&errors},
-              vals.eq_classes);
-
-  return errors;
-}
-
-// A type that represents a range of profiles that are acceptable to be matched.
-//
-// `MinProf` is the minimum set of syntactic requirements that must be met.
-//
-// `MaxProf` is the maximum set of syntactic requirements that must be met.
-// This maximum is particularly useful for certain "strictness" checking. Some
-// examples for when this is useful:
-//
-// * Making sure that a type is move-only (rather than simply movable)
-//
-// * Making sure that a member function is *not* noexcept in cases where it
-//   cannot be noexcept, such as if a dependent datamember has certain
-//   operations that are not noexcept.
-//
-// * Making sure that a type tightly matches a spec, such as the standard.
-//
-// `LogicalProf` is the Profile for which run-time testing is to take place.
-//
-// Note: The reason for `LogicalProf` is because it is often the case, when
-// dealing with templates, that a declaration of a given operation is specified,
-// but whose body would fail to instantiate. Examples include the
-// copy-constructor of a standard container when the element-type is move-only,
-// or the comparison operators of a standard container when the element-type
-// does not have the necessary comparison operations defined. The `LogicalProf`
-// parameter allows us to capture the intent of what should be tested at
-// run-time, even in the cases where syntactically it might otherwise appear as
-// though the type undergoing testing supports more than it actually does.
-template <class LogicalProf, class MinProf = LogicalProf,
-          class MaxProf = MinProf>
-struct ProfileRange {
-  using logical_profile = LogicalProf;
-  using min_profile = MinProf;
-  using max_profile = MaxProf;
-};
-
-// Similar to ProfileRange except that it creates a profile range that is
-// coupled with a Domain and is used when testing that a type matches exactly
-// the "minimum" requirements of LogicalProf.
-template <class StrictnessDomain, class LogicalProf,
-          class MinProf = LogicalProf, class MaxProf = MinProf>
-struct StrictProfileRange {
-  // We do not yet support extension.
-  static_assert(
-      std::is_same<StrictnessDomain, RegularityDomain>::value,
-      "Currently, the only valid StrictnessDomain is RegularityDomain.");
-  using strictness_domain = StrictnessDomain;
-  using logical_profile = LogicalProf;
-  using min_profile = MinProf;
-  using max_profile = MaxProf;
-};
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction that creates a StrictProfileRange from a Domain and either a
-// Profile or ProfileRange.
-template <class StrictnessDomain, class ProfOrRange>
-struct MakeStrictProfileRange;
-
-template <class StrictnessDomain, class LogicalProf>
-struct MakeStrictProfileRange {
-  using type = StrictProfileRange<StrictnessDomain, LogicalProf>;
-};
-
-template <class StrictnessDomain, class LogicalProf, class MinProf,
-          class MaxProf>
-struct MakeStrictProfileRange<StrictnessDomain,
-                              ProfileRange<LogicalProf, MinProf, MaxProf>> {
-  using type =
-      StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>;
-};
-
-template <class StrictnessDomain, class ProfOrRange>
-using MakeStrictProfileRangeT =
-    typename MakeStrictProfileRange<StrictnessDomain, ProfOrRange>::type;
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// A profile in the RegularityDomain with the strongest possible requirements.
-using MostStrictProfile =
-    CombineProfiles<TriviallyCompleteProfile, NothrowComparableProfile>;
-
-// Forms a ProfileRange that treats the Profile as the bare minimum requirements
-// of a type.
-template <class LogicalProf, class MinProf = LogicalProf>
-using LooseProfileRange = StrictProfileRange<RegularityDomain, LogicalProf,
-                                             MinProf, MostStrictProfile>;
-
-template <class Prof>
-using MakeLooseProfileRangeT = Prof;
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// The following classes implement the metafunction ProfileRangeOfT<T> that
-// takes either a Profile or ProfileRange and yields the ProfileRange to be
-// used during testing.
-//
-template <class T, class /*Enabler*/ = void>
-struct ProfileRangeOfImpl;
-
-template <class T>
-struct ProfileRangeOfImpl<T, absl::void_t<PropertiesOfT<T>>> {
-  using type = LooseProfileRange<T>;
-};
-
-template <class T>
-struct ProfileRangeOf : ProfileRangeOfImpl<T> {};
-
-template <class StrictnessDomain, class LogicalProf, class MinProf,
-          class MaxProf>
-struct ProfileRangeOf<
-    StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>> {
-  using type =
-      StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>;
-};
-
-template <class T>
-using ProfileRangeOfT = typename ProfileRangeOf<T>::type;
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// Extract the logical profile of a range (what will be runtime tested).
-template <class T>
-using LogicalProfileOfT = typename ProfileRangeOfT<T>::logical_profile;
-
-// Extract the minimal syntactic profile of a range (error if not at least).
-template <class T>
-using MinProfileOfT = typename ProfileRangeOfT<T>::min_profile;
-
-// Extract the maximum syntactic profile of a range (error if more than).
-template <class T>
-using MaxProfileOfT = typename ProfileRangeOfT<T>::max_profile;
-
-////////////////////////////////////////////////////////////////////////////////
-//
-template <class T>
-struct IsProfileOrProfileRange : IsProfile<T>::type {};
-
-template <class StrictnessDomain, class LogicalProf, class MinProf,
-          class MaxProf>
-struct IsProfileOrProfileRange<
-    StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>>
-    : std::true_type {};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// TODO(calabrese): Consider naming the functions in this class the same as
-// the macros (defined later on) so that auto-complete leads to the correct name
-// and so that a user cannot accidentally call a function rather than the macro
-// form.
-template <bool ExpectSuccess, class T, class... EqClasses>
-struct ExpectConformanceOf {
-  // Add a value to be tested. Subsequent calls to this function on the same
-  // object must specify logically "larger" values with respect to the
-  // comparison operators of the type, if any.
-  //
-  // NOTE: This function should not be called directly. A stateless lambda is
-  // implicitly formed and passed when using the INITIALIZER macro at the bottom
-  // of this file.
-  template <class Fun,
-            absl::enable_if_t<std::is_same<
-                ResultOfGeneratorT<GeneratorType<Fun>>, T>::value>** = nullptr>
-  ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...,
-                                           EquivalenceClassType<Fun>>
-  initializer(GeneratorType<Fun> fun) && {
-    return {
-        {std::tuple_cat(absl::move(ordered_vals.eq_classes),
-                        std::make_tuple((EquivalenceClass)(absl::move(fun))))},
-        std::move(expected_failed_tests)};
-  }
-
-  template <class... TestNames,
-            absl::enable_if_t<!ExpectSuccess && sizeof...(EqClasses) == 0 &&
-                              absl::conjunction<std::is_convertible<
-                                  TestNames, absl::string_view>...>::value>** =
-                nullptr>
-  ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...>
-  due_to(TestNames&&... test_names) && {
-    (InsertEach)(&expected_failed_tests,
-                 absl::AsciiStrToLower(absl::string_view(test_names))...);
-
-    return {absl::move(ordered_vals), std::move(expected_failed_tests)};
-  }
-
-  template <class... TestNames, int = 0,  // MSVC disambiguator
-            absl::enable_if_t<ExpectSuccess && sizeof...(EqClasses) == 0 &&
-                              absl::conjunction<std::is_convertible<
-                                  TestNames, absl::string_view>...>::value>** =
-                nullptr>
-  ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...>
-  due_to(TestNames&&... test_names) && {
-    // TODO(calabrese) Instead have DUE_TO only exist via a CRTP base.
-    // This would produce better errors messages than the static_assert.
-    static_assert(!ExpectSuccess,
-                  "DUE_TO cannot be called when conformance is expected -- did "
-                  "you mean to use ASSERT_NONCONFORMANCE_OF?");
-  }
-
-  // Add a value to be tested. Subsequent calls to this function on the same
-  // object must specify logically "larger" values with respect to the
-  // comparison operators of the type, if any.
-  //
-  // NOTE: This function should not be called directly. A stateful lambda is
-  // implicitly formed and passed when using the INITIALIZER macro at the bottom
-  // of this file.
-  template <class Fun,
-            absl::enable_if_t<std::is_same<
-                ResultOfGeneratorT<GeneratorType<Fun>>, T>::value>** = nullptr>
-  ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...,
-                                           EquivalenceClassType<Fun>>
-  dont_class_directly_stateful_initializer(GeneratorType<Fun> fun) && {
-    return {
-        {std::tuple_cat(absl::move(ordered_vals.eq_classes),
-                        std::make_tuple((EquivalenceClass)(absl::move(fun))))},
-        std::move(expected_failed_tests)};
-  }
-
-  // Add a set of value to be tested, where each value is equal with respect to
-  // the comparison operators and std::hash specialization, if defined.
-  template <
-      class... Funs,
-      absl::void_t<absl::enable_if_t<std::is_same<
-          ResultOfGeneratorT<GeneratorType<Funs>>, T>::value>...>** = nullptr>
-  ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...,
-                                           EquivalenceClassType<Funs...>>
-  equivalence_class(GeneratorType<Funs>... funs) && {
-    return {{std::tuple_cat(
-                absl::move(ordered_vals.eq_classes),
-                std::make_tuple((EquivalenceClass)(absl::move(funs)...)))},
-            std::move(expected_failed_tests)};
-  }
-
-  // Execute the tests for the captured set of values, strictly matching a range
-  // of expected profiles in a given domain.
-  template <
-      class ProfRange,
-      absl::enable_if_t<IsProfileOrProfileRange<ProfRange>::value>** = nullptr>
-  ABSL_MUST_USE_RESULT ::testing::AssertionResult with_strict_profile(
-      ProfRange /*profile*/) {
-    ConformanceErrors test_result =
-        (ExpectRegularityImpl<
-            T, LogicalProfileOfT<ProfRange>, MinProfileOfT<ProfRange>,
-            MaxProfileOfT<ProfRange>>)(absl::move(ordered_vals));
-
-    return ExpectSuccess ? test_result.assertionResult()
-                         : test_result.expectFailedTests(expected_failed_tests);
-  }
-
-  // Execute the tests for the captured set of values, loosely matching a range
-  // of expected profiles (loose in that an interface is allowed to be more
-  // refined that a profile suggests, such as a type having a noexcept copy
-  // constructor when all that is required is that the copy constructor exists).
-  template <class Prof, absl::enable_if_t<IsProfile<Prof>::value>** = nullptr>
-  ABSL_MUST_USE_RESULT ::testing::AssertionResult with_loose_profile(
-      Prof /*profile*/) {
-    ConformanceErrors test_result =
-        (ExpectRegularityImpl<
-            T, Prof, Prof,
-            CombineProfiles<TriviallyCompleteProfile,
-                            NothrowComparableProfile>>)(absl::
-                                                            move(ordered_vals));
-
-    return ExpectSuccess ? test_result.assertionResult()
-                         : test_result.expectFailedTests(expected_failed_tests);
-  }
-
-  OrderedEquivalenceClasses<EqClasses...> ordered_vals;
-  std::set<std::string> expected_failed_tests;
-};
-
-template <class T>
-using ExpectConformanceOfType = ExpectConformanceOf</*ExpectSuccess=*/true, T>;
-
-template <class T>
-using ExpectNonconformanceOfType =
-    ExpectConformanceOf</*ExpectSuccess=*/false, T>;
-
-struct EquivalenceClassMaker {
-  // TODO(calabrese) Constrain to callable
-  template <class Fun>
-  static GeneratorType<Fun> initializer(GeneratorType<Fun> fun) {
-    return fun;
-  }
-};
-
-// A top-level macro that begins the builder pattern.
-//
-// The argument here takes the datatype to be tested.
-#define ABSL_INTERNAL_ASSERT_CONFORMANCE_OF(...)                            \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                             \
-  if ABSL_INTERNAL_LPAREN                                                   \
-  const ::testing::AssertionResult gtest_ar =                               \
-      ABSL_INTERNAL_LPAREN ::absl::types_internal::ExpectConformanceOfType< \
-          __VA_ARGS__>()
-
-// Akin to ASSERT_CONFORMANCE_OF except that it expects failure and tries to
-// match text.
-#define ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(...)                            \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
-  if ABSL_INTERNAL_LPAREN                                                      \
-  const ::testing::AssertionResult gtest_ar =                                  \
-      ABSL_INTERNAL_LPAREN ::absl::types_internal::ExpectNonconformanceOfType< \
-          __VA_ARGS__>()
-
-////////////////////////////////////////////////////////////////////////////////
-// NOTE: The following macros look like they are recursive, but are not (macros
-// cannot recurse). These actually refer to member functions of the same name.
-// This is done intentionally so that a user cannot accidentally invoke a
-// member function of the conformance-testing suite without going through the
-// macro.
-////////////////////////////////////////////////////////////////////////////////
-
-// Specify expected test failures as comma-separated strings.
-#define DUE_TO(...) due_to(__VA_ARGS__)
-
-// Specify a value to be tested.
-//
-// Note: Internally, this takes an expression and turns it into the return value
-// of lambda that captures no data. The expression is stringized during
-// preprocessing so that it can be used in error reports.
-#define INITIALIZER(...)                         \
-  initializer(::absl::types_internal::Generator( \
-      [] { return __VA_ARGS__; }, ABSL_INTERNAL_STRINGIZE(__VA_ARGS__)))
-
-// Specify a value to be tested.
-//
-// Note: Internally, this takes an expression and turns it into the return value
-// of lambda that captures data by reference. The expression is stringized
-// during preprocessing so that it can be used in error reports.
-#define STATEFUL_INITIALIZER(...)                         \
-  stateful_initializer(::absl::types_internal::Generator( \
-      [&] { return __VA_ARGS__; }, ABSL_INTERNAL_STRINGIZE(__VA_ARGS__)))
-
-// Used in the builder-pattern.
-//
-// Takes a series of INITIALIZER and/or STATEFUL_INITIALIZER invocations and
-// forwards them along to be tested, grouping them such that the testing suite
-// knows that they are supposed to represent the same logical value (the values
-// compare the same, hash the same, etc.).
-#define EQUIVALENCE_CLASS(...)                    \
-  equivalence_class(ABSL_INTERNAL_TRANSFORM_ARGS( \
-      ABSL_INTERNAL_PREPEND_EQ_MAKER, __VA_ARGS__))
-
-// An invocation of this or WITH_STRICT_PROFILE must end the builder-pattern.
-// It takes a Profile as its argument.
-//
-// This executes the tests and allows types that are "more referined" than the
-// profile specifies, but not less. For instance, if the Profile specifies
-// noexcept copy-constructiblity, the test will fail if the copy-constructor is
-// not noexcept, however, it will succeed if the copy constructor is trivial.
-//
-// This is useful for testing that a type meets some minimum set of
-// requirements.
-#define WITH_LOOSE_PROFILE(...)                                      \
-  with_loose_profile(                                                \
-      ::absl::types_internal::MakeLooseProfileRangeT<__VA_ARGS__>()) \
-      ABSL_INTERNAL_RPAREN ABSL_INTERNAL_RPAREN;                     \
-  else GTEST_FATAL_FAILURE_(gtest_ar.failure_message())  // NOLINT
-
-// An invocation of this or WITH_STRICT_PROFILE must end the builder-pattern.
-// It takes a Domain and a Profile as its arguments.
-//
-// This executes the tests and disallows types that differ at all from the
-// properties of the Profile. For instance, if the Profile specifies noexcept
-// copy-constructiblity, the test will fail if the copy constructor is trivial.
-//
-// This is useful for testing that a type does not do anything more than a
-// specification requires, such as to minimize things like Hyrum's Law, or more
-// commonly, to prevent a type from being "accidentally" copy-constructible in
-// a way that may produce incorrect results, simply because the user forget to
-// delete that operation.
-#define WITH_STRICT_PROFILE(...)                                      \
-  with_strict_profile(                                                \
-      ::absl::types_internal::MakeStrictProfileRangeT<__VA_ARGS__>()) \
-      ABSL_INTERNAL_RPAREN ABSL_INTERNAL_RPAREN;                      \
-  else GTEST_FATAL_FAILURE_(gtest_ar.failure_message())  // NOLINT
-
-// Internal macro that is used in the internals of the EDSL when forming
-// equivalence classes.
-#define ABSL_INTERNAL_PREPEND_EQ_MAKER(arg) \
-  ::absl::types_internal::EquivalenceClassMaker().arg
-
-}  // namespace types_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_H_
diff --git a/third_party/abseil/absl/types/internal/conformance_testing_helpers.h b/third_party/abseil/absl/types/internal/conformance_testing_helpers.h
deleted file mode 100644
index 00775f9..0000000
--- a/third_party/abseil/absl/types/internal/conformance_testing_helpers.h
+++ /dev/null
@@ -1,391 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_
-#define ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_
-
-// Checks to determine whether or not we can use abi::__cxa_demangle
-#if (defined(__ANDROID__) || defined(ANDROID)) && !defined(OS_ANDROID)
-#define ABSL_INTERNAL_OS_ANDROID
-#endif
-
-// We support certain compilers only.  See demangle.h for details.
-#if defined(OS_ANDROID) && (defined(__i386__) || defined(__x86_64__))
-#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 0
-#elif (__GNUC__ >= 4 || (__GNUC__ >= 3 && __GNUC_MINOR__ >= 4)) && \
-    !defined(__mips__)
-#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 1
-#elif defined(__clang__) && !defined(_MSC_VER)
-#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 1
-#else
-#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 0
-#endif
-
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-#include "absl/utility/utility.h"
-
-#if ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE
-#include <cxxabi.h>
-
-#include <cstdlib>
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace types_internal {
-
-// Return a readable name for type T.
-template <class T>
-absl::string_view NameOfImpl() {
-// TODO(calabrese) Investigate using debugging:internal_demangle as a fallback.
-#if ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE
-  int status = 0;
-  char* demangled_name = nullptr;
-
-  demangled_name =
-      abi::__cxa_demangle(typeid(T).name(), nullptr, nullptr, &status);
-
-  if (status == 0 && demangled_name != nullptr) {
-    return demangled_name;
-  } else {
-    return typeid(T).name();
-  }
-#else
-  return typeid(T).name();
-#endif
-  // NOTE: We intentionally leak demangled_name so that it remains valid
-  // throughout the remainder of the program.
-}
-
-// Given a type, returns as nice of a type name as we can produce (demangled).
-//
-// Note: This currently strips cv-qualifiers and references, but that is okay
-// because we only use this internally with unqualified object types.
-template <class T>
-std::string NameOf() {
-  static const absl::string_view result = NameOfImpl<T>();
-  return std::string(result);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// Metafunction to check if a type is callable with no explicit arguments
-template <class Fun, class /*Enabler*/ = void>
-struct IsNullaryCallableImpl : std::false_type {};
-
-template <class Fun>
-struct IsNullaryCallableImpl<
-    Fun, absl::void_t<decltype(std::declval<const Fun&>()())>>
-    : std::true_type {
-  using result_type = decltype(std::declval<const Fun&>()());
-
-  template <class ValueType>
-  using for_type = std::is_same<ValueType, result_type>;
-
-  using void_if_true = void;
-};
-
-template <class Fun>
-struct IsNullaryCallable : IsNullaryCallableImpl<Fun> {};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// A type that contains a function object that returns an instance of a type
-// that is undergoing conformance testing. This function is required to always
-// return the same value upon invocation.
-template <class Fun>
-struct GeneratorType;
-
-// A type that contains a tuple of GeneratorType<Fun> where each Fun has the
-// same return type. The result of each of the different generators should all
-// be equal values, though the underlying object representation may differ (such
-// as if one returns 0.0 and another return -0.0, or if one returns an empty
-// vector and another returns an empty vector with a different capacity.
-template <class... Funs>
-struct EquivalenceClassType;
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction to check if a type is a specialization of EquivalenceClassType
-template <class T>
-struct IsEquivalenceClass : std::false_type {};
-
-template <>
-struct IsEquivalenceClass<EquivalenceClassType<>> : std::true_type {
-  using self = IsEquivalenceClass;
-
-  // A metafunction to check if this EquivalenceClassType is a valid
-  // EquivalenceClassType for a type `ValueType` that is undergoing testing
-  template <class ValueType>
-  using for_type = std::true_type;
-};
-
-template <class Head, class... Tail>
-struct IsEquivalenceClass<EquivalenceClassType<Head, Tail...>>
-    : std::true_type {
-  using self = IsEquivalenceClass;
-
-  // The type undergoing conformance testing that this EquivalenceClass
-  // corresponds to
-  using result_type = typename IsNullaryCallable<Head>::result_type;
-
-  // A metafunction to check if this EquivalenceClassType is a valid
-  // EquivalenceClassType for a type `ValueType` that is undergoing testing
-  template <class ValueType>
-  using for_type = std::is_same<ValueType, result_type>;
-};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// A type that contains an ordered series of EquivalenceClassTypes, where the
-// the function object of each underlying GeneratorType has the same return type
-//
-// These equivalence classes are required to be in a logical ascending order
-// that is consistent with comparison operators that are defined for the return
-// type of each GeneratorType, if any.
-template <class... EqClasses>
-struct OrderedEquivalenceClasses;
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction to determine the return type of the function object contained
-// in a GeneratorType specialization.
-template <class T>
-struct ResultOfGenerator {};
-
-template <class Fun>
-struct ResultOfGenerator<GeneratorType<Fun>> {
-  using type = decltype(std::declval<const Fun&>()());
-};
-
-template <class Fun>
-using ResultOfGeneratorT = typename ResultOfGenerator<GeneratorType<Fun>>::type;
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction that yields true iff each of Funs is a GeneratorType
-// specialization and they all contain functions with the same return type
-template <class /*Enabler*/, class... Funs>
-struct AreGeneratorsWithTheSameReturnTypeImpl : std::false_type {};
-
-template <>
-struct AreGeneratorsWithTheSameReturnTypeImpl<void> : std::true_type {};
-
-template <class Head, class... Tail>
-struct AreGeneratorsWithTheSameReturnTypeImpl<
-    typename std::enable_if<absl::conjunction<std::is_same<
-        ResultOfGeneratorT<Head>, ResultOfGeneratorT<Tail>>...>::value>::type,
-    Head, Tail...> : std::true_type {};
-
-template <class... Funs>
-struct AreGeneratorsWithTheSameReturnType
-    : AreGeneratorsWithTheSameReturnTypeImpl<void, Funs...>::type {};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// A metafunction that yields true iff each of Funs is an EquivalenceClassType
-// specialization and they all contain GeneratorType specializations that have
-// the same return type
-template <class... EqClasses>
-struct AreEquivalenceClassesOfTheSameType {
-  static_assert(sizeof...(EqClasses) != sizeof...(EqClasses), "");
-};
-
-template <>
-struct AreEquivalenceClassesOfTheSameType<> : std::true_type {
-  using self = AreEquivalenceClassesOfTheSameType;
-
-  // Metafunction to check that a type is the same as all of the equivalence
-  // classes, if any.
-  // Note: In this specialization there are no equivalence classes, so the
-  // value type is always compatible.
-  template <class /*ValueType*/>
-  using for_type = std::true_type;
-};
-
-template <class... Funs>
-struct AreEquivalenceClassesOfTheSameType<EquivalenceClassType<Funs...>>
-    : std::true_type {
-  using self = AreEquivalenceClassesOfTheSameType;
-
-  // Metafunction to check that a type is the same as all of the equivalence
-  // classes, if any.
-  template <class ValueType>
-  using for_type = typename IsEquivalenceClass<
-      EquivalenceClassType<Funs...>>::template for_type<ValueType>;
-};
-
-template <class... TailEqClasses>
-struct AreEquivalenceClassesOfTheSameType<
-    EquivalenceClassType<>, EquivalenceClassType<>, TailEqClasses...>
-    : AreEquivalenceClassesOfTheSameType<TailEqClasses...>::self {};
-
-template <class HeadNextFun, class... TailNextFuns, class... TailEqClasses>
-struct AreEquivalenceClassesOfTheSameType<
-    EquivalenceClassType<>, EquivalenceClassType<HeadNextFun, TailNextFuns...>,
-    TailEqClasses...>
-    : AreEquivalenceClassesOfTheSameType<
-          EquivalenceClassType<HeadNextFun, TailNextFuns...>,
-          TailEqClasses...>::self {};
-
-template <class HeadHeadFun, class... TailHeadFuns, class... TailEqClasses>
-struct AreEquivalenceClassesOfTheSameType<
-    EquivalenceClassType<HeadHeadFun, TailHeadFuns...>, EquivalenceClassType<>,
-    TailEqClasses...>
-    : AreEquivalenceClassesOfTheSameType<
-          EquivalenceClassType<HeadHeadFun, TailHeadFuns...>,
-          TailEqClasses...>::self {};
-
-template <class HeadHeadFun, class... TailHeadFuns, class HeadNextFun,
-          class... TailNextFuns, class... TailEqClasses>
-struct AreEquivalenceClassesOfTheSameType<
-    EquivalenceClassType<HeadHeadFun, TailHeadFuns...>,
-    EquivalenceClassType<HeadNextFun, TailNextFuns...>, TailEqClasses...>
-    : absl::conditional_t<
-          IsNullaryCallable<HeadNextFun>::template for_type<
-              typename IsNullaryCallable<HeadHeadFun>::result_type>::value,
-          AreEquivalenceClassesOfTheSameType<
-              EquivalenceClassType<HeadHeadFun, TailHeadFuns...>,
-              TailEqClasses...>,
-          std::false_type> {};
-//
-////////////////////////////////////////////////////////////////////////////////
-
-// Execute a function for each passed-in parameter.
-template <class Fun, class... Cases>
-void ForEachParameter(const Fun& fun, const Cases&... cases) {
-  const std::initializer_list<bool> results = {
-      (static_cast<void>(fun(cases)), true)...};
-
-  (void)results;
-}
-
-// Execute a function on each passed-in parameter (using a bound function).
-template <class Fun>
-struct ForEachParameterFun {
-  template <class... T>
-  void operator()(const T&... cases) const {
-    (ForEachParameter)(fun, cases...);
-  }
-
-  Fun fun;
-};
-
-// Execute a function on each element of a tuple.
-template <class Fun, class Tup>
-void ForEachTupleElement(const Fun& fun, const Tup& tup) {
-  absl::apply(ForEachParameterFun<Fun>{fun}, tup);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// Execute a function for each combination of two elements of a tuple, including
-// combinations of an element with itself.
-template <class Fun, class... T>
-struct ForEveryTwoImpl {
-  template <class Lhs>
-  struct WithBoundLhs {
-    template <class Rhs>
-    void operator()(const Rhs& rhs) const {
-      fun(lhs, rhs);
-    }
-
-    Fun fun;
-    Lhs lhs;
-  };
-
-  template <class Lhs>
-  void operator()(const Lhs& lhs) const {
-    (ForEachTupleElement)(WithBoundLhs<Lhs>{fun, lhs}, args);
-  }
-
-  Fun fun;
-  std::tuple<T...> args;
-};
-
-template <class Fun, class... T>
-void ForEveryTwo(const Fun& fun, std::tuple<T...> args) {
-  (ForEachTupleElement)(ForEveryTwoImpl<Fun, T...>{fun, args}, args);
-}
-//
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-//
-// Insert all values into an associative container
-template<class Container>
-void InsertEach(Container* cont) {
-}
-
-template<class Container, class H, class... T>
-void InsertEach(Container* cont, H&& head, T&&... tail) {
-  cont->insert(head);
-  (InsertEach)(cont, tail...);
-}
-//
-////////////////////////////////////////////////////////////////////////////////
-// A template with a nested "Invoke" static-member-function that executes a
-// passed-in Callable when `Condition` is true, otherwise it ignores the
-// Callable. This is useful for executing a function object with a condition
-// that corresponds to whether or not the Callable can be safely instantiated.
-// It has some overlapping uses with C++17 `if constexpr`.
-template <bool Condition>
-struct If;
-
-template <>
-struct If</*Condition =*/false> {
-  template <class Fun, class... P>
-  static void Invoke(const Fun& /*fun*/, P&&... /*args*/) {}
-};
-
-template <>
-struct If</*Condition =*/true> {
-  template <class Fun, class... P>
-  static void Invoke(const Fun& fun, P&&... args) {
-    // TODO(calabrese) Use std::invoke equivalent instead of function-call.
-    fun(absl::forward<P>(args)...);
-  }
-};
-
-//
-// ABSL_INTERNAL_STRINGIZE(...)
-//
-// This variadic macro transforms its arguments into a c-string literal after
-// expansion.
-//
-// Example:
-//
-//   ABSL_INTERNAL_STRINGIZE(std::array<int, 10>)
-//
-// Results in:
-//
-//   "std::array<int, 10>"
-#define ABSL_INTERNAL_STRINGIZE(...) ABSL_INTERNAL_STRINGIZE_IMPL((__VA_ARGS__))
-#define ABSL_INTERNAL_STRINGIZE_IMPL(arg) ABSL_INTERNAL_STRINGIZE_IMPL2 arg
-#define ABSL_INTERNAL_STRINGIZE_IMPL2(...) #__VA_ARGS__
-
-}  // namespace types_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_
diff --git a/third_party/abseil/absl/types/internal/conformance_testing_test.cc b/third_party/abseil/absl/types/internal/conformance_testing_test.cc
deleted file mode 100644
index cf262fa..0000000
--- a/third_party/abseil/absl/types/internal/conformance_testing_test.cc
+++ /dev/null
@@ -1,1556 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/internal/conformance_testing.h"
-
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/internal/conformance_aliases.h"
-#include "absl/types/internal/conformance_profile.h"
-
-namespace {
-
-namespace ti = absl::types_internal;
-
-template <class T>
-using DefaultConstructibleWithNewImpl = decltype(::new (std::nothrow) T);
-
-template <class T>
-using DefaultConstructibleWithNew =
-    absl::type_traits_internal::is_detected<DefaultConstructibleWithNewImpl, T>;
-
-template <class T>
-using MoveConstructibleWithNewImpl =
-    decltype(::new (std::nothrow) T(std::declval<T>()));
-
-template <class T>
-using MoveConstructibleWithNew =
-    absl::type_traits_internal::is_detected<MoveConstructibleWithNewImpl, T>;
-
-template <class T>
-using CopyConstructibleWithNewImpl =
-    decltype(::new (std::nothrow) T(std::declval<const T&>()));
-
-template <class T>
-using CopyConstructibleWithNew =
-    absl::type_traits_internal::is_detected<CopyConstructibleWithNewImpl, T>;
-
-template <class T,
-          class Result =
-              std::integral_constant<bool, noexcept(::new (std::nothrow) T)>>
-using NothrowDefaultConstructibleWithNewImpl =
-    typename std::enable_if<Result::value>::type;
-
-template <class T>
-using NothrowDefaultConstructibleWithNew =
-    absl::type_traits_internal::is_detected<
-        NothrowDefaultConstructibleWithNewImpl, T>;
-
-template <class T,
-          class Result = std::integral_constant<
-              bool, noexcept(::new (std::nothrow) T(std::declval<T>()))>>
-using NothrowMoveConstructibleWithNewImpl =
-    typename std::enable_if<Result::value>::type;
-
-template <class T>
-using NothrowMoveConstructibleWithNew =
-    absl::type_traits_internal::is_detected<NothrowMoveConstructibleWithNewImpl,
-                                            T>;
-
-template <class T,
-          class Result = std::integral_constant<
-              bool, noexcept(::new (std::nothrow) T(std::declval<const T&>()))>>
-using NothrowCopyConstructibleWithNewImpl =
-    typename std::enable_if<Result::value>::type;
-
-template <class T>
-using NothrowCopyConstructibleWithNew =
-    absl::type_traits_internal::is_detected<NothrowCopyConstructibleWithNewImpl,
-                                            T>;
-
-// NOTE: ?: is used to verify contextually-convertible to bool and not simply
-//       implicit or explicit convertibility.
-#define ABSL_INTERNAL_COMPARISON_OP_EXPR(op) \
-  ((std::declval<const T&>() op std::declval<const T&>()) ? true : true)
-
-#define ABSL_INTERNAL_COMPARISON_OP_TRAIT(name, op)                         \
-  template <class T>                                                        \
-  using name##Impl = decltype(ABSL_INTERNAL_COMPARISON_OP_EXPR(op));        \
-                                                                            \
-  template <class T>                                                        \
-  using name = absl::type_traits_internal::is_detected<name##Impl, T>;      \
-                                                                            \
-  template <class T,                                                        \
-            class Result = std::integral_constant<                          \
-                bool, noexcept(ABSL_INTERNAL_COMPARISON_OP_EXPR(op))>>      \
-  using Nothrow##name##Impl = typename std::enable_if<Result::value>::type; \
-                                                                            \
-  template <class T>                                                        \
-  using Nothrow##name =                                                     \
-      absl::type_traits_internal::is_detected<Nothrow##name##Impl, T>
-
-ABSL_INTERNAL_COMPARISON_OP_TRAIT(EqualityComparable, ==);
-ABSL_INTERNAL_COMPARISON_OP_TRAIT(InequalityComparable, !=);
-ABSL_INTERNAL_COMPARISON_OP_TRAIT(LessThanComparable, <);
-ABSL_INTERNAL_COMPARISON_OP_TRAIT(LessEqualComparable, <=);
-ABSL_INTERNAL_COMPARISON_OP_TRAIT(GreaterEqualComparable, >=);
-ABSL_INTERNAL_COMPARISON_OP_TRAIT(GreaterThanComparable, >);
-
-#undef ABSL_INTERNAL_COMPARISON_OP_TRAIT
-
-template <class T>
-class ProfileTest : public ::testing::Test {};
-
-TYPED_TEST_SUITE_P(ProfileTest);
-
-TYPED_TEST_P(ProfileTest, HasAppropriateConstructionProperties) {
-  using profile = typename TypeParam::profile;
-  using arch = typename TypeParam::arch;
-  using expected_profile = typename TypeParam::expected_profile;
-
-  using props = ti::PropertiesOfT<profile>;
-  using arch_props = ti::PropertiesOfArchetypeT<arch>;
-  using expected_props = ti::PropertiesOfT<expected_profile>;
-
-  // Make sure all of the properties are as expected.
-  // There are seemingly redundant tests here to make it easier to diagnose
-  // the specifics of the failure if something were to go wrong.
-  EXPECT_TRUE((std::is_same<props, arch_props>::value));
-  EXPECT_TRUE((std::is_same<props, expected_props>::value));
-  EXPECT_TRUE((std::is_same<arch_props, expected_props>::value));
-
-  EXPECT_EQ(props::default_constructible_support,
-            expected_props::default_constructible_support);
-
-  EXPECT_EQ(props::move_constructible_support,
-            expected_props::move_constructible_support);
-
-  EXPECT_EQ(props::copy_constructible_support,
-            expected_props::copy_constructible_support);
-
-  EXPECT_EQ(props::destructible_support, expected_props::destructible_support);
-
-  // Avoid additional error message noise when profile and archetype match with
-  // each other but were not what was expected.
-  if (!std::is_same<props, arch_props>::value) {
-    EXPECT_EQ(arch_props::default_constructible_support,
-              expected_props::default_constructible_support);
-
-    EXPECT_EQ(arch_props::move_constructible_support,
-              expected_props::move_constructible_support);
-
-    EXPECT_EQ(arch_props::copy_constructible_support,
-              expected_props::copy_constructible_support);
-
-    EXPECT_EQ(arch_props::destructible_support,
-              expected_props::destructible_support);
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                       Default constructor checks                         //
-  //////////////////////////////////////////////////////////////////////////////
-  EXPECT_EQ(props::default_constructible_support,
-            expected_props::default_constructible_support);
-
-  switch (expected_props::default_constructible_support) {
-    case ti::default_constructible::maybe:
-      EXPECT_FALSE(DefaultConstructibleWithNew<arch>::value);
-      EXPECT_FALSE(NothrowDefaultConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_FALSE(std::is_default_constructible<arch>::value);
-        EXPECT_FALSE(std::is_nothrow_default_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_default_constructible<arch>::value);
-      }
-      break;
-    case ti::default_constructible::yes:
-      EXPECT_TRUE(DefaultConstructibleWithNew<arch>::value);
-      EXPECT_FALSE(NothrowDefaultConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_default_constructible<arch>::value);
-        EXPECT_FALSE(std::is_nothrow_default_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_default_constructible<arch>::value);
-      }
-      break;
-    case ti::default_constructible::nothrow:
-      EXPECT_TRUE(DefaultConstructibleWithNew<arch>::value);
-      EXPECT_TRUE(NothrowDefaultConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_default_constructible<arch>::value);
-        EXPECT_TRUE(std::is_nothrow_default_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_default_constructible<arch>::value);
-
-        // Constructor traits also check the destructor.
-        if (std::is_nothrow_destructible<arch>::value) {
-          EXPECT_TRUE(std::is_nothrow_default_constructible<arch>::value);
-        }
-      }
-      break;
-    case ti::default_constructible::trivial:
-      EXPECT_TRUE(DefaultConstructibleWithNew<arch>::value);
-      EXPECT_TRUE(NothrowDefaultConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_default_constructible<arch>::value);
-        EXPECT_TRUE(std::is_nothrow_default_constructible<arch>::value);
-
-        // Constructor triviality traits require trivially destructible types.
-        if (absl::is_trivially_destructible<arch>::value) {
-          EXPECT_TRUE(absl::is_trivially_default_constructible<arch>::value);
-        }
-      }
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                         Move constructor checks                          //
-  //////////////////////////////////////////////////////////////////////////////
-  EXPECT_EQ(props::move_constructible_support,
-            expected_props::move_constructible_support);
-
-  switch (expected_props::move_constructible_support) {
-    case ti::move_constructible::maybe:
-      EXPECT_FALSE(MoveConstructibleWithNew<arch>::value);
-      EXPECT_FALSE(NothrowMoveConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_FALSE(std::is_move_constructible<arch>::value);
-        EXPECT_FALSE(std::is_nothrow_move_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_move_constructible<arch>::value);
-      }
-      break;
-    case ti::move_constructible::yes:
-      EXPECT_TRUE(MoveConstructibleWithNew<arch>::value);
-      EXPECT_FALSE(NothrowMoveConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_move_constructible<arch>::value);
-        EXPECT_FALSE(std::is_nothrow_move_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_move_constructible<arch>::value);
-      }
-      break;
-    case ti::move_constructible::nothrow:
-      EXPECT_TRUE(MoveConstructibleWithNew<arch>::value);
-      EXPECT_TRUE(NothrowMoveConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_move_constructible<arch>::value);
-        EXPECT_TRUE(std::is_nothrow_move_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_move_constructible<arch>::value);
-
-        // Constructor traits also check the destructor.
-        if (std::is_nothrow_destructible<arch>::value) {
-          EXPECT_TRUE(std::is_nothrow_move_constructible<arch>::value);
-        }
-      }
-      break;
-    case ti::move_constructible::trivial:
-      EXPECT_TRUE(MoveConstructibleWithNew<arch>::value);
-      EXPECT_TRUE(NothrowMoveConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_move_constructible<arch>::value);
-        EXPECT_TRUE(std::is_nothrow_move_constructible<arch>::value);
-
-        // Constructor triviality traits require trivially destructible types.
-        if (absl::is_trivially_destructible<arch>::value) {
-          EXPECT_TRUE(absl::is_trivially_move_constructible<arch>::value);
-        }
-      }
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                         Copy constructor checks                          //
-  //////////////////////////////////////////////////////////////////////////////
-  EXPECT_EQ(props::copy_constructible_support,
-            expected_props::copy_constructible_support);
-
-  switch (expected_props::copy_constructible_support) {
-    case ti::copy_constructible::maybe:
-      EXPECT_FALSE(CopyConstructibleWithNew<arch>::value);
-      EXPECT_FALSE(NothrowCopyConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_FALSE(std::is_copy_constructible<arch>::value);
-        EXPECT_FALSE(std::is_nothrow_copy_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_copy_constructible<arch>::value);
-      }
-      break;
-    case ti::copy_constructible::yes:
-      EXPECT_TRUE(CopyConstructibleWithNew<arch>::value);
-      EXPECT_FALSE(NothrowCopyConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_copy_constructible<arch>::value);
-        EXPECT_FALSE(std::is_nothrow_copy_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_copy_constructible<arch>::value);
-      }
-      break;
-    case ti::copy_constructible::nothrow:
-      EXPECT_TRUE(CopyConstructibleWithNew<arch>::value);
-      EXPECT_TRUE(NothrowCopyConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_copy_constructible<arch>::value);
-        EXPECT_TRUE(std::is_nothrow_copy_constructible<arch>::value);
-        EXPECT_FALSE(absl::is_trivially_copy_constructible<arch>::value);
-
-        // Constructor traits also check the destructor.
-        if (std::is_nothrow_destructible<arch>::value) {
-          EXPECT_TRUE(std::is_nothrow_copy_constructible<arch>::value);
-        }
-      }
-      break;
-    case ti::copy_constructible::trivial:
-      EXPECT_TRUE(CopyConstructibleWithNew<arch>::value);
-      EXPECT_TRUE(NothrowCopyConstructibleWithNew<arch>::value);
-
-      // Standard constructible traits depend on the destructor.
-      if (std::is_destructible<arch>::value) {
-        EXPECT_TRUE(std::is_copy_constructible<arch>::value);
-        EXPECT_TRUE(std::is_nothrow_copy_constructible<arch>::value);
-
-        // Constructor triviality traits require trivially destructible types.
-        if (absl::is_trivially_destructible<arch>::value) {
-          EXPECT_TRUE(absl::is_trivially_copy_constructible<arch>::value);
-        }
-      }
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                           Destructible checks                            //
-  //////////////////////////////////////////////////////////////////////////////
-  EXPECT_EQ(props::destructible_support, expected_props::destructible_support);
-
-  switch (expected_props::destructible_support) {
-    case ti::destructible::maybe:
-      EXPECT_FALSE(std::is_destructible<arch>::value);
-      EXPECT_FALSE(std::is_nothrow_destructible<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_destructible<arch>::value);
-      break;
-    case ti::destructible::yes:
-      EXPECT_TRUE(std::is_destructible<arch>::value);
-      EXPECT_FALSE(std::is_nothrow_destructible<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_destructible<arch>::value);
-      break;
-    case ti::destructible::nothrow:
-      EXPECT_TRUE(std::is_destructible<arch>::value);
-      EXPECT_TRUE(std::is_nothrow_destructible<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_destructible<arch>::value);
-      break;
-    case ti::destructible::trivial:
-      EXPECT_TRUE(std::is_destructible<arch>::value);
-      EXPECT_TRUE(std::is_nothrow_destructible<arch>::value);
-      EXPECT_TRUE(absl::is_trivially_destructible<arch>::value);
-      break;
-  }
-}
-
-TYPED_TEST_P(ProfileTest, HasAppropriateAssignmentProperties) {
-  using profile = typename TypeParam::profile;
-  using arch = typename TypeParam::arch;
-  using expected_profile = typename TypeParam::expected_profile;
-
-  using props = ti::PropertiesOfT<profile>;
-  using arch_props = ti::PropertiesOfArchetypeT<arch>;
-  using expected_props = ti::PropertiesOfT<expected_profile>;
-
-  // Make sure all of the properties are as expected.
-  // There are seemingly redundant tests here to make it easier to diagnose
-  // the specifics of the failure if something were to go wrong.
-  EXPECT_TRUE((std::is_same<props, arch_props>::value));
-  EXPECT_TRUE((std::is_same<props, expected_props>::value));
-  EXPECT_TRUE((std::is_same<arch_props, expected_props>::value));
-
-  EXPECT_EQ(props::move_assignable_support,
-            expected_props::move_assignable_support);
-
-  EXPECT_EQ(props::copy_assignable_support,
-            expected_props::copy_assignable_support);
-
-  // Avoid additional error message noise when profile and archetype match with
-  // each other but were not what was expected.
-  if (!std::is_same<props, arch_props>::value) {
-    EXPECT_EQ(arch_props::move_assignable_support,
-              expected_props::move_assignable_support);
-
-    EXPECT_EQ(arch_props::copy_assignable_support,
-              expected_props::copy_assignable_support);
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                          Move assignment checks                          //
-  //////////////////////////////////////////////////////////////////////////////
-  EXPECT_EQ(props::move_assignable_support,
-            expected_props::move_assignable_support);
-
-  switch (expected_props::move_assignable_support) {
-    case ti::move_assignable::maybe:
-      EXPECT_FALSE(std::is_move_assignable<arch>::value);
-      EXPECT_FALSE(std::is_nothrow_move_assignable<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_move_assignable<arch>::value);
-      break;
-    case ti::move_assignable::yes:
-      EXPECT_TRUE(std::is_move_assignable<arch>::value);
-      EXPECT_FALSE(std::is_nothrow_move_assignable<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_move_assignable<arch>::value);
-      break;
-    case ti::move_assignable::nothrow:
-      EXPECT_TRUE(std::is_move_assignable<arch>::value);
-      EXPECT_TRUE(std::is_nothrow_move_assignable<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_move_assignable<arch>::value);
-      break;
-    case ti::move_assignable::trivial:
-      EXPECT_TRUE(std::is_move_assignable<arch>::value);
-      EXPECT_TRUE(std::is_nothrow_move_assignable<arch>::value);
-      EXPECT_TRUE(absl::is_trivially_move_assignable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                          Copy assignment checks                          //
-  //////////////////////////////////////////////////////////////////////////////
-  EXPECT_EQ(props::copy_assignable_support,
-            expected_props::copy_assignable_support);
-
-  switch (expected_props::copy_assignable_support) {
-    case ti::copy_assignable::maybe:
-      EXPECT_FALSE(std::is_copy_assignable<arch>::value);
-      EXPECT_FALSE(std::is_nothrow_copy_assignable<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_copy_assignable<arch>::value);
-      break;
-    case ti::copy_assignable::yes:
-      EXPECT_TRUE(std::is_copy_assignable<arch>::value);
-      EXPECT_FALSE(std::is_nothrow_copy_assignable<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_copy_assignable<arch>::value);
-      break;
-    case ti::copy_assignable::nothrow:
-      EXPECT_TRUE(std::is_copy_assignable<arch>::value);
-      EXPECT_TRUE(std::is_nothrow_copy_assignable<arch>::value);
-      EXPECT_FALSE(absl::is_trivially_copy_assignable<arch>::value);
-      break;
-    case ti::copy_assignable::trivial:
-      EXPECT_TRUE(std::is_copy_assignable<arch>::value);
-      EXPECT_TRUE(std::is_nothrow_copy_assignable<arch>::value);
-      EXPECT_TRUE(absl::is_trivially_copy_assignable<arch>::value);
-      break;
-  }
-}
-
-TYPED_TEST_P(ProfileTest, HasAppropriateComparisonProperties) {
-  using profile = typename TypeParam::profile;
-  using arch = typename TypeParam::arch;
-  using expected_profile = typename TypeParam::expected_profile;
-
-  using props = ti::PropertiesOfT<profile>;
-  using arch_props = ti::PropertiesOfArchetypeT<arch>;
-  using expected_props = ti::PropertiesOfT<expected_profile>;
-
-  // Make sure all of the properties are as expected.
-  // There are seemingly redundant tests here to make it easier to diagnose
-  // the specifics of the failure if something were to go wrong.
-  EXPECT_TRUE((std::is_same<props, arch_props>::value));
-  EXPECT_TRUE((std::is_same<props, expected_props>::value));
-  EXPECT_TRUE((std::is_same<arch_props, expected_props>::value));
-
-  EXPECT_EQ(props::equality_comparable_support,
-            expected_props::equality_comparable_support);
-
-  EXPECT_EQ(props::inequality_comparable_support,
-            expected_props::inequality_comparable_support);
-
-  EXPECT_EQ(props::less_than_comparable_support,
-            expected_props::less_than_comparable_support);
-
-  EXPECT_EQ(props::less_equal_comparable_support,
-            expected_props::less_equal_comparable_support);
-
-  EXPECT_EQ(props::greater_equal_comparable_support,
-            expected_props::greater_equal_comparable_support);
-
-  EXPECT_EQ(props::greater_than_comparable_support,
-            expected_props::greater_than_comparable_support);
-
-  // Avoid additional error message noise when profile and archetype match with
-  // each other but were not what was expected.
-  if (!std::is_same<props, arch_props>::value) {
-    EXPECT_EQ(arch_props::equality_comparable_support,
-              expected_props::equality_comparable_support);
-
-    EXPECT_EQ(arch_props::inequality_comparable_support,
-              expected_props::inequality_comparable_support);
-
-    EXPECT_EQ(arch_props::less_than_comparable_support,
-              expected_props::less_than_comparable_support);
-
-    EXPECT_EQ(arch_props::less_equal_comparable_support,
-              expected_props::less_equal_comparable_support);
-
-    EXPECT_EQ(arch_props::greater_equal_comparable_support,
-              expected_props::greater_equal_comparable_support);
-
-    EXPECT_EQ(arch_props::greater_than_comparable_support,
-              expected_props::greater_than_comparable_support);
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                        Equality comparable checks                        //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::equality_comparable_support) {
-    case ti::equality_comparable::maybe:
-      EXPECT_FALSE(EqualityComparable<arch>::value);
-      EXPECT_FALSE(NothrowEqualityComparable<arch>::value);
-      break;
-    case ti::equality_comparable::yes:
-      EXPECT_TRUE(EqualityComparable<arch>::value);
-      EXPECT_FALSE(NothrowEqualityComparable<arch>::value);
-      break;
-    case ti::equality_comparable::nothrow:
-      EXPECT_TRUE(EqualityComparable<arch>::value);
-      EXPECT_TRUE(NothrowEqualityComparable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                       Inequality comparable checks                       //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::inequality_comparable_support) {
-    case ti::inequality_comparable::maybe:
-      EXPECT_FALSE(InequalityComparable<arch>::value);
-      EXPECT_FALSE(NothrowInequalityComparable<arch>::value);
-      break;
-    case ti::inequality_comparable::yes:
-      EXPECT_TRUE(InequalityComparable<arch>::value);
-      EXPECT_FALSE(NothrowInequalityComparable<arch>::value);
-      break;
-    case ti::inequality_comparable::nothrow:
-      EXPECT_TRUE(InequalityComparable<arch>::value);
-      EXPECT_TRUE(NothrowInequalityComparable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                       Less than comparable checks                        //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::less_than_comparable_support) {
-    case ti::less_than_comparable::maybe:
-      EXPECT_FALSE(LessThanComparable<arch>::value);
-      EXPECT_FALSE(NothrowLessThanComparable<arch>::value);
-      break;
-    case ti::less_than_comparable::yes:
-      EXPECT_TRUE(LessThanComparable<arch>::value);
-      EXPECT_FALSE(NothrowLessThanComparable<arch>::value);
-      break;
-    case ti::less_than_comparable::nothrow:
-      EXPECT_TRUE(LessThanComparable<arch>::value);
-      EXPECT_TRUE(NothrowLessThanComparable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                      Less equal comparable checks                        //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::less_equal_comparable_support) {
-    case ti::less_equal_comparable::maybe:
-      EXPECT_FALSE(LessEqualComparable<arch>::value);
-      EXPECT_FALSE(NothrowLessEqualComparable<arch>::value);
-      break;
-    case ti::less_equal_comparable::yes:
-      EXPECT_TRUE(LessEqualComparable<arch>::value);
-      EXPECT_FALSE(NothrowLessEqualComparable<arch>::value);
-      break;
-    case ti::less_equal_comparable::nothrow:
-      EXPECT_TRUE(LessEqualComparable<arch>::value);
-      EXPECT_TRUE(NothrowLessEqualComparable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                     Greater equal comparable checks                      //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::greater_equal_comparable_support) {
-    case ti::greater_equal_comparable::maybe:
-      EXPECT_FALSE(GreaterEqualComparable<arch>::value);
-      EXPECT_FALSE(NothrowGreaterEqualComparable<arch>::value);
-      break;
-    case ti::greater_equal_comparable::yes:
-      EXPECT_TRUE(GreaterEqualComparable<arch>::value);
-      EXPECT_FALSE(NothrowGreaterEqualComparable<arch>::value);
-      break;
-    case ti::greater_equal_comparable::nothrow:
-      EXPECT_TRUE(GreaterEqualComparable<arch>::value);
-      EXPECT_TRUE(NothrowGreaterEqualComparable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                     Greater than comparable checks                       //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::greater_than_comparable_support) {
-    case ti::greater_than_comparable::maybe:
-      EXPECT_FALSE(GreaterThanComparable<arch>::value);
-      EXPECT_FALSE(NothrowGreaterThanComparable<arch>::value);
-      break;
-    case ti::greater_than_comparable::yes:
-      EXPECT_TRUE(GreaterThanComparable<arch>::value);
-      EXPECT_FALSE(NothrowGreaterThanComparable<arch>::value);
-      break;
-    case ti::greater_than_comparable::nothrow:
-      EXPECT_TRUE(GreaterThanComparable<arch>::value);
-      EXPECT_TRUE(NothrowGreaterThanComparable<arch>::value);
-      break;
-  }
-}
-
-TYPED_TEST_P(ProfileTest, HasAppropriateAuxilliaryProperties) {
-  using profile = typename TypeParam::profile;
-  using arch = typename TypeParam::arch;
-  using expected_profile = typename TypeParam::expected_profile;
-
-  using props = ti::PropertiesOfT<profile>;
-  using arch_props = ti::PropertiesOfArchetypeT<arch>;
-  using expected_props = ti::PropertiesOfT<expected_profile>;
-
-  // Make sure all of the properties are as expected.
-  // There are seemingly redundant tests here to make it easier to diagnose
-  // the specifics of the failure if something were to go wrong.
-  EXPECT_TRUE((std::is_same<props, arch_props>::value));
-  EXPECT_TRUE((std::is_same<props, expected_props>::value));
-  EXPECT_TRUE((std::is_same<arch_props, expected_props>::value));
-
-  EXPECT_EQ(props::swappable_support, expected_props::swappable_support);
-
-  EXPECT_EQ(props::hashable_support, expected_props::hashable_support);
-
-  // Avoid additional error message noise when profile and archetype match with
-  // each other but were not what was expected.
-  if (!std::is_same<props, arch_props>::value) {
-    EXPECT_EQ(arch_props::swappable_support, expected_props::swappable_support);
-
-    EXPECT_EQ(arch_props::hashable_support, expected_props::hashable_support);
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                            Swappable checks                              //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::swappable_support) {
-    case ti::swappable::maybe:
-      EXPECT_FALSE(absl::type_traits_internal::IsSwappable<arch>::value);
-      EXPECT_FALSE(absl::type_traits_internal::IsNothrowSwappable<arch>::value);
-      break;
-    case ti::swappable::yes:
-      EXPECT_TRUE(absl::type_traits_internal::IsSwappable<arch>::value);
-      EXPECT_FALSE(absl::type_traits_internal::IsNothrowSwappable<arch>::value);
-      break;
-    case ti::swappable::nothrow:
-      EXPECT_TRUE(absl::type_traits_internal::IsSwappable<arch>::value);
-      EXPECT_TRUE(absl::type_traits_internal::IsNothrowSwappable<arch>::value);
-      break;
-  }
-
-  //////////////////////////////////////////////////////////////////////////////
-  //                             Hashable checks                              //
-  //////////////////////////////////////////////////////////////////////////////
-  switch (expected_props::hashable_support) {
-    case ti::hashable::maybe:
-#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-      EXPECT_FALSE(absl::type_traits_internal::IsHashable<arch>::value);
-#endif  // ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-      break;
-    case ti::hashable::yes:
-      EXPECT_TRUE(absl::type_traits_internal::IsHashable<arch>::value);
-      break;
-  }
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ProfileTest, HasAppropriateConstructionProperties,
-                            HasAppropriateAssignmentProperties,
-                            HasAppropriateComparisonProperties,
-                            HasAppropriateAuxilliaryProperties);
-
-template <class Profile, class Arch, class ExpectedProfile>
-struct ProfileAndExpectation {
-  using profile = Profile;
-  using arch = Arch;
-  using expected_profile = ExpectedProfile;
-};
-
-using CoreProfilesToTest = ::testing::Types<
-    // The terminating case of combine (all properties are "maybe").
-    ProfileAndExpectation<ti::CombineProfiles<>,
-                          ti::Archetype<ti::CombineProfiles<>>,
-                          ti::ConformanceProfile<>>,
-
-    // Core default constructor profiles
-    ProfileAndExpectation<
-        ti::HasDefaultConstructorProfile, ti::HasDefaultConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowDefaultConstructorProfile,
-        ti::HasNothrowDefaultConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::nothrow>>,
-    ProfileAndExpectation<
-        ti::HasTrivialDefaultConstructorProfile,
-        ti::HasTrivialDefaultConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::trivial>>,
-
-    // Core move constructor profiles
-    ProfileAndExpectation<
-        ti::HasMoveConstructorProfile, ti::HasMoveConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::maybe,
-                               ti::move_constructible::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowMoveConstructorProfile,
-        ti::HasNothrowMoveConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::maybe,
-                               ti::move_constructible::nothrow>>,
-    ProfileAndExpectation<
-        ti::HasTrivialMoveConstructorProfile,
-        ti::HasTrivialMoveConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::maybe,
-                               ti::move_constructible::trivial>>,
-
-    // Core copy constructor profiles
-    ProfileAndExpectation<
-        ti::HasCopyConstructorProfile, ti::HasCopyConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::maybe,
-                               ti::move_constructible::maybe,
-                               ti::copy_constructible::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowCopyConstructorProfile,
-        ti::HasNothrowCopyConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::maybe,
-                               ti::move_constructible::maybe,
-                               ti::copy_constructible::nothrow>>,
-    ProfileAndExpectation<
-        ti::HasTrivialCopyConstructorProfile,
-        ti::HasTrivialCopyConstructorArchetype,
-        ti::ConformanceProfile<ti::default_constructible::maybe,
-                               ti::move_constructible::maybe,
-                               ti::copy_constructible::trivial>>,
-
-    // Core move assignment profiles
-    ProfileAndExpectation<
-        ti::HasMoveAssignProfile, ti::HasMoveAssignArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowMoveAssignProfile, ti::HasNothrowMoveAssignArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::nothrow>>,
-    ProfileAndExpectation<
-        ti::HasTrivialMoveAssignProfile, ti::HasTrivialMoveAssignArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::trivial>>,
-
-    // Core copy assignment profiles
-    ProfileAndExpectation<
-        ti::HasCopyAssignProfile, ti::HasCopyAssignArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowCopyAssignProfile, ti::HasNothrowCopyAssignArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::nothrow>>,
-    ProfileAndExpectation<
-        ti::HasTrivialCopyAssignProfile, ti::HasTrivialCopyAssignArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::trivial>>,
-
-    // Core destructor profiles
-    ProfileAndExpectation<
-        ti::HasDestructorProfile, ti::HasDestructorArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowDestructorProfile, ti::HasNothrowDestructorArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow>>,
-    ProfileAndExpectation<
-        ti::HasTrivialDestructorProfile, ti::HasTrivialDestructorArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::trivial>>,
-
-    // Core equality comparable profiles
-    ProfileAndExpectation<
-        ti::HasEqualityProfile, ti::HasEqualityArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowEqualityProfile, ti::HasNothrowEqualityArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::nothrow>>,
-
-    // Core inequality comparable profiles
-    ProfileAndExpectation<
-        ti::HasInequalityProfile, ti::HasInequalityArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowInequalityProfile, ti::HasNothrowInequalityArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe,
-            ti::inequality_comparable::nothrow>>,
-
-    // Core less than comparable profiles
-    ProfileAndExpectation<
-        ti::HasLessThanProfile, ti::HasLessThanArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowLessThanProfile, ti::HasNothrowLessThanArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::nothrow>>,
-
-    // Core less equal comparable profiles
-    ProfileAndExpectation<
-        ti::HasLessEqualProfile, ti::HasLessEqualArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowLessEqualProfile, ti::HasNothrowLessEqualArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe,
-            ti::less_equal_comparable::nothrow>>,
-
-    // Core greater equal comparable profiles
-    ProfileAndExpectation<
-        ti::HasGreaterEqualProfile, ti::HasGreaterEqualArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowGreaterEqualProfile, ti::HasNothrowGreaterEqualArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::nothrow>>,
-
-    // Core greater than comparable profiles
-    ProfileAndExpectation<
-        ti::HasGreaterThanProfile, ti::HasGreaterThanArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowGreaterThanProfile, ti::HasNothrowGreaterThanArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::nothrow>>,
-
-    // Core swappable profiles
-    ProfileAndExpectation<
-        ti::HasSwapProfile, ti::HasSwapArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::yes>>,
-    ProfileAndExpectation<
-        ti::HasNothrowSwapProfile, ti::HasNothrowSwapArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::nothrow>>,
-
-    // Core hashable profiles
-    ProfileAndExpectation<
-        ti::HasStdHashSpecializationProfile,
-        ti::HasStdHashSpecializationArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::maybe,
-            ti::hashable::yes>>>;
-
-using CommonProfilesToTest = ::testing::Types<
-    // NothrowMoveConstructible
-    ProfileAndExpectation<
-        ti::NothrowMoveConstructibleProfile,
-        ti::NothrowMoveConstructibleArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow>>,
-
-    // CopyConstructible
-    ProfileAndExpectation<
-        ti::CopyConstructibleProfile, ti::CopyConstructibleArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::yes, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow>>,
-
-    // NothrowMovable
-    ProfileAndExpectation<
-        ti::NothrowMovableProfile, ti::NothrowMovableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::maybe, ti::move_assignable::nothrow,
-            ti::copy_assignable::maybe, ti::destructible::nothrow,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::nothrow>>,
-
-    // Value
-    ProfileAndExpectation<
-        ti::ValueProfile, ti::ValueArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::yes, ti::move_assignable::nothrow,
-            ti::copy_assignable::yes, ti::destructible::nothrow,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::nothrow>>,
-
-    ////////////////////////////////////////////////////////////////////////////
-    //                  Common but also DefaultConstructible                  //
-    ////////////////////////////////////////////////////////////////////////////
-
-    // DefaultConstructibleNothrowMoveConstructible
-    ProfileAndExpectation<
-        ti::DefaultConstructibleNothrowMoveConstructibleProfile,
-        ti::DefaultConstructibleNothrowMoveConstructibleArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::yes, ti::move_constructible::nothrow,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow>>,
-
-    // DefaultConstructibleCopyConstructible
-    ProfileAndExpectation<
-        ti::DefaultConstructibleCopyConstructibleProfile,
-        ti::DefaultConstructibleCopyConstructibleArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::yes, ti::move_constructible::nothrow,
-            ti::copy_constructible::yes, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow>>,
-
-    // DefaultConstructibleNothrowMovable
-    ProfileAndExpectation<
-        ti::DefaultConstructibleNothrowMovableProfile,
-        ti::DefaultConstructibleNothrowMovableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::yes, ti::move_constructible::nothrow,
-            ti::copy_constructible::maybe, ti::move_assignable::nothrow,
-            ti::copy_assignable::maybe, ti::destructible::nothrow,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::nothrow>>,
-
-    // DefaultConstructibleValue
-    ProfileAndExpectation<
-        ti::DefaultConstructibleValueProfile,
-        ti::DefaultConstructibleValueArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::yes, ti::move_constructible::nothrow,
-            ti::copy_constructible::yes, ti::move_assignable::nothrow,
-            ti::copy_assignable::yes, ti::destructible::nothrow,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::nothrow>>>;
-
-using ComparableHelpersProfilesToTest = ::testing::Types<
-    // Equatable
-    ProfileAndExpectation<
-        ti::EquatableProfile, ti::EquatableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes>>,
-
-    // Comparable
-    ProfileAndExpectation<
-        ti::ComparableProfile, ti::ComparableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes,
-            ti::less_than_comparable::yes, ti::less_equal_comparable::yes,
-            ti::greater_equal_comparable::yes,
-            ti::greater_than_comparable::yes>>,
-
-    // NothrowEquatable
-    ProfileAndExpectation<
-        ti::NothrowEquatableProfile, ti::NothrowEquatableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::nothrow,
-            ti::inequality_comparable::nothrow>>,
-
-    // NothrowComparable
-    ProfileAndExpectation<
-        ti::NothrowComparableProfile, ti::NothrowComparableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::maybe,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::maybe,
-            ti::equality_comparable::nothrow,
-            ti::inequality_comparable::nothrow,
-            ti::less_than_comparable::nothrow,
-            ti::less_equal_comparable::nothrow,
-            ti::greater_equal_comparable::nothrow,
-            ti::greater_than_comparable::nothrow>>>;
-
-using CommonComparableProfilesToTest = ::testing::Types<
-    // ComparableNothrowMoveConstructible
-    ProfileAndExpectation<
-        ti::ComparableNothrowMoveConstructibleProfile,
-        ti::ComparableNothrowMoveConstructibleArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::maybe, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes,
-            ti::less_than_comparable::yes, ti::less_equal_comparable::yes,
-            ti::greater_equal_comparable::yes,
-            ti::greater_than_comparable::yes>>,
-
-    // ComparableCopyConstructible
-    ProfileAndExpectation<
-        ti::ComparableCopyConstructibleProfile,
-        ti::ComparableCopyConstructibleArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::yes, ti::move_assignable::maybe,
-            ti::copy_assignable::maybe, ti::destructible::nothrow,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes,
-            ti::less_than_comparable::yes, ti::less_equal_comparable::yes,
-            ti::greater_equal_comparable::yes,
-            ti::greater_than_comparable::yes>>,
-
-    // ComparableNothrowMovable
-    ProfileAndExpectation<
-        ti::ComparableNothrowMovableProfile,
-        ti::ComparableNothrowMovableArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::maybe, ti::move_assignable::nothrow,
-            ti::copy_assignable::maybe, ti::destructible::nothrow,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes,
-            ti::less_than_comparable::yes, ti::less_equal_comparable::yes,
-            ti::greater_equal_comparable::yes, ti::greater_than_comparable::yes,
-            ti::swappable::nothrow>>,
-
-    // ComparableValue
-    ProfileAndExpectation<
-        ti::ComparableValueProfile, ti::ComparableValueArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::maybe, ti::move_constructible::nothrow,
-            ti::copy_constructible::yes, ti::move_assignable::nothrow,
-            ti::copy_assignable::yes, ti::destructible::nothrow,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes,
-            ti::less_than_comparable::yes, ti::less_equal_comparable::yes,
-            ti::greater_equal_comparable::yes, ti::greater_than_comparable::yes,
-            ti::swappable::nothrow>>>;
-
-using TrivialProfilesToTest = ::testing::Types<
-    ProfileAndExpectation<
-        ti::TrivialSpecialMemberFunctionsProfile,
-        ti::TrivialSpecialMemberFunctionsArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::trivial, ti::move_constructible::trivial,
-            ti::copy_constructible::trivial, ti::move_assignable::trivial,
-            ti::copy_assignable::trivial, ti::destructible::trivial,
-            ti::equality_comparable::maybe, ti::inequality_comparable::maybe,
-            ti::less_than_comparable::maybe, ti::less_equal_comparable::maybe,
-            ti::greater_equal_comparable::maybe,
-            ti::greater_than_comparable::maybe, ti::swappable::nothrow>>,
-
-    ProfileAndExpectation<
-        ti::TriviallyCompleteProfile, ti::TriviallyCompleteArchetype,
-        ti::ConformanceProfile<
-            ti::default_constructible::trivial, ti::move_constructible::trivial,
-            ti::copy_constructible::trivial, ti::move_assignable::trivial,
-            ti::copy_assignable::trivial, ti::destructible::trivial,
-            ti::equality_comparable::yes, ti::inequality_comparable::yes,
-            ti::less_than_comparable::yes, ti::less_equal_comparable::yes,
-            ti::greater_equal_comparable::yes, ti::greater_than_comparable::yes,
-            ti::swappable::nothrow, ti::hashable::yes>>>;
-
-INSTANTIATE_TYPED_TEST_SUITE_P(Core, ProfileTest, CoreProfilesToTest);
-INSTANTIATE_TYPED_TEST_SUITE_P(Common, ProfileTest, CommonProfilesToTest);
-INSTANTIATE_TYPED_TEST_SUITE_P(ComparableHelpers, ProfileTest,
-                               ComparableHelpersProfilesToTest);
-INSTANTIATE_TYPED_TEST_SUITE_P(CommonComparable, ProfileTest,
-                               CommonComparableProfilesToTest);
-INSTANTIATE_TYPED_TEST_SUITE_P(Trivial, ProfileTest, TrivialProfilesToTest);
-
-TEST(ConformanceTestingTest, Basic) {
-  using profile = ti::CombineProfiles<ti::TriviallyCompleteProfile,
-                                      ti::NothrowComparableProfile>;
-
-  using lim = std::numeric_limits<float>;
-
-  ABSL_INTERNAL_ASSERT_CONFORMANCE_OF(float)
-      .INITIALIZER(-lim::infinity())
-      .INITIALIZER(lim::lowest())
-      .INITIALIZER(-1.f)
-      .INITIALIZER(-lim::min())
-      .EQUIVALENCE_CLASS(INITIALIZER(-0.f), INITIALIZER(0.f))
-      .INITIALIZER(lim::min())
-      .INITIALIZER(1.f)
-      .INITIALIZER(lim::max())
-      .INITIALIZER(lim::infinity())
-      .WITH_STRICT_PROFILE(absl::types_internal::RegularityDomain, profile);
-}
-
-struct BadMoveConstruct {
-  BadMoveConstruct() = default;
-  BadMoveConstruct(BadMoveConstruct&& other) noexcept
-      : value(other.value + 1) {}
-  BadMoveConstruct& operator=(BadMoveConstruct&& other) noexcept = default;
-  int value = 0;
-
-  friend bool operator==(BadMoveConstruct const& lhs,
-                         BadMoveConstruct const& rhs) {
-    return lhs.value == rhs.value;
-  }
-  friend bool operator!=(BadMoveConstruct const& lhs,
-                         BadMoveConstruct const& rhs) {
-    return lhs.value != rhs.value;
-  }
-};
-
-struct BadMoveAssign {
-  BadMoveAssign() = default;
-  BadMoveAssign(BadMoveAssign&& other) noexcept = default;
-  BadMoveAssign& operator=(BadMoveAssign&& other) noexcept {
-    int new_value = other.value + 1;
-    value = new_value;
-    return *this;
-  }
-  int value = 0;
-
-  friend bool operator==(BadMoveAssign const& lhs, BadMoveAssign const& rhs) {
-    return lhs.value == rhs.value;
-  }
-  friend bool operator!=(BadMoveAssign const& lhs, BadMoveAssign const& rhs) {
-    return lhs.value != rhs.value;
-  }
-};
-
-enum class WhichCompIsBad { eq, ne, lt, le, ge, gt };
-
-template <WhichCompIsBad Which>
-struct BadCompare {
-  int value;
-
-  friend bool operator==(BadCompare const& lhs, BadCompare const& rhs) {
-    return Which == WhichCompIsBad::eq ? lhs.value != rhs.value
-                                       : lhs.value == rhs.value;
-  }
-
-  friend bool operator!=(BadCompare const& lhs, BadCompare const& rhs) {
-    return Which == WhichCompIsBad::ne ? lhs.value == rhs.value
-                                       : lhs.value != rhs.value;
-  }
-
-  friend bool operator<(BadCompare const& lhs, BadCompare const& rhs) {
-    return Which == WhichCompIsBad::lt ? lhs.value >= rhs.value
-                                       : lhs.value < rhs.value;
-  }
-
-  friend bool operator<=(BadCompare const& lhs, BadCompare const& rhs) {
-    return Which == WhichCompIsBad::le ? lhs.value > rhs.value
-                                       : lhs.value <= rhs.value;
-  }
-
-  friend bool operator>=(BadCompare const& lhs, BadCompare const& rhs) {
-    return Which == WhichCompIsBad::ge ? lhs.value < rhs.value
-                                       : lhs.value >= rhs.value;
-  }
-
-  friend bool operator>(BadCompare const& lhs, BadCompare const& rhs) {
-    return Which == WhichCompIsBad::gt ? lhs.value <= rhs.value
-                                       : lhs.value > rhs.value;
-  }
-};
-
-TEST(ConformanceTestingDeathTest, Failures) {
-  {
-    using profile = ti::CombineProfiles<ti::TriviallyCompleteProfile,
-                                        ti::NothrowComparableProfile>;
-
-    // Note: The initializers are intentionally in the wrong order.
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(float)
-        .INITIALIZER(1.f)
-        .INITIALIZER(0.f)
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using profile =
-        ti::CombineProfiles<ti::NothrowMovableProfile, ti::EquatableProfile>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadMoveConstruct)
-        .DUE_TO("Move construction")
-        .INITIALIZER(BadMoveConstruct())
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using profile =
-        ti::CombineProfiles<ti::NothrowMovableProfile, ti::EquatableProfile>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadMoveAssign)
-        .DUE_TO("Move assignment")
-        .INITIALIZER(BadMoveAssign())
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-TEST(ConformanceTestingDeathTest, CompFailures) {
-  using profile = ti::ComparableProfile;
-
-  {
-    using BadComp = BadCompare<WhichCompIsBad::eq>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
-        .DUE_TO("Comparison")
-        .INITIALIZER(BadComp{0})
-        .INITIALIZER(BadComp{1})
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using BadComp = BadCompare<WhichCompIsBad::ne>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
-        .DUE_TO("Comparison")
-        .INITIALIZER(BadComp{0})
-        .INITIALIZER(BadComp{1})
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using BadComp = BadCompare<WhichCompIsBad::lt>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
-        .DUE_TO("Comparison")
-        .INITIALIZER(BadComp{0})
-        .INITIALIZER(BadComp{1})
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using BadComp = BadCompare<WhichCompIsBad::le>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
-        .DUE_TO("Comparison")
-        .INITIALIZER(BadComp{0})
-        .INITIALIZER(BadComp{1})
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using BadComp = BadCompare<WhichCompIsBad::ge>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
-        .DUE_TO("Comparison")
-        .INITIALIZER(BadComp{0})
-        .INITIALIZER(BadComp{1})
-        .WITH_LOOSE_PROFILE(profile);
-  }
-
-  {
-    using BadComp = BadCompare<WhichCompIsBad::gt>;
-
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
-        .DUE_TO("Comparison")
-        .INITIALIZER(BadComp{0})
-        .INITIALIZER(BadComp{1})
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-struct BadSelfMove {
-  BadSelfMove() = default;
-  BadSelfMove(BadSelfMove&&) = default;
-  BadSelfMove& operator=(BadSelfMove&& other) noexcept {
-    if (this == &other) {
-      broken_state = true;
-    }
-    return *this;
-  }
-
-  friend bool operator==(const BadSelfMove& lhs, const BadSelfMove& rhs) {
-    return !(lhs.broken_state || rhs.broken_state);
-  }
-
-  friend bool operator!=(const BadSelfMove& lhs, const BadSelfMove& rhs) {
-    return lhs.broken_state || rhs.broken_state;
-  }
-
-  bool broken_state = false;
-};
-
-TEST(ConformanceTestingDeathTest, SelfMoveFailure) {
-  using profile = ti::EquatableNothrowMovableProfile;
-
-  {
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadSelfMove)
-        .DUE_TO("Move assignment")
-        .INITIALIZER(BadSelfMove())
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-struct BadSelfCopy {
-  BadSelfCopy() = default;
-  BadSelfCopy(BadSelfCopy&&) = default;
-  BadSelfCopy(const BadSelfCopy&) = default;
-  BadSelfCopy& operator=(BadSelfCopy&&) = default;
-  BadSelfCopy& operator=(BadSelfCopy const& other) {
-    if (this == &other) {
-      broken_state = true;
-    }
-    return *this;
-  }
-
-  friend bool operator==(const BadSelfCopy& lhs, const BadSelfCopy& rhs) {
-    return !(lhs.broken_state || rhs.broken_state);
-  }
-
-  friend bool operator!=(const BadSelfCopy& lhs, const BadSelfCopy& rhs) {
-    return lhs.broken_state || rhs.broken_state;
-  }
-
-  bool broken_state = false;
-};
-
-TEST(ConformanceTestingDeathTest, SelfCopyFailure) {
-  using profile = ti::EquatableValueProfile;
-
-  {
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadSelfCopy)
-        .DUE_TO("Copy assignment")
-        .INITIALIZER(BadSelfCopy())
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-struct BadSelfSwap {
-  friend void swap(BadSelfSwap& lhs, BadSelfSwap& rhs) noexcept {
-    if (&lhs == &rhs) lhs.broken_state = true;
-  }
-
-  friend bool operator==(const BadSelfSwap& lhs, const BadSelfSwap& rhs) {
-    return !(lhs.broken_state || rhs.broken_state);
-  }
-
-  friend bool operator!=(const BadSelfSwap& lhs, const BadSelfSwap& rhs) {
-    return lhs.broken_state || rhs.broken_state;
-  }
-
-  bool broken_state = false;
-};
-
-TEST(ConformanceTestingDeathTest, SelfSwapFailure) {
-  using profile = ti::EquatableNothrowMovableProfile;
-
-  {
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadSelfSwap)
-        .DUE_TO("Swap")
-        .INITIALIZER(BadSelfSwap())
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-struct BadDefaultInitializedMoveAssign {
-  BadDefaultInitializedMoveAssign() : default_initialized(true) {}
-  explicit BadDefaultInitializedMoveAssign(int v) : value(v) {}
-  BadDefaultInitializedMoveAssign(
-      BadDefaultInitializedMoveAssign&& other) noexcept
-      : value(other.value) {}
-  BadDefaultInitializedMoveAssign& operator=(
-      BadDefaultInitializedMoveAssign&& other) noexcept {
-    value = other.value;
-    if (default_initialized) ++value;  // Bad move if lhs is default initialized
-    return *this;
-  }
-
-  friend bool operator==(const BadDefaultInitializedMoveAssign& lhs,
-                         const BadDefaultInitializedMoveAssign& rhs) {
-    return lhs.value == rhs.value;
-  }
-
-  friend bool operator!=(const BadDefaultInitializedMoveAssign& lhs,
-                         const BadDefaultInitializedMoveAssign& rhs) {
-    return lhs.value != rhs.value;
-  }
-
-  bool default_initialized = false;
-  int value = 0;
-};
-
-TEST(ConformanceTestingDeathTest, DefaultInitializedMoveAssignFailure) {
-  using profile =
-      ti::CombineProfiles<ti::DefaultConstructibleNothrowMovableProfile,
-                          ti::EquatableProfile>;
-
-  {
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadDefaultInitializedMoveAssign)
-        .DUE_TO("move assignment")
-        .INITIALIZER(BadDefaultInitializedMoveAssign(0))
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-struct BadDefaultInitializedCopyAssign {
-  BadDefaultInitializedCopyAssign() : default_initialized(true) {}
-  explicit BadDefaultInitializedCopyAssign(int v) : value(v) {}
-  BadDefaultInitializedCopyAssign(
-      BadDefaultInitializedCopyAssign&& other) noexcept
-      : value(other.value) {}
-  BadDefaultInitializedCopyAssign(const BadDefaultInitializedCopyAssign& other)
-      : value(other.value) {}
-
-  BadDefaultInitializedCopyAssign& operator=(
-      BadDefaultInitializedCopyAssign&& other) noexcept {
-    value = other.value;
-    return *this;
-  }
-
-  BadDefaultInitializedCopyAssign& operator=(
-      const BadDefaultInitializedCopyAssign& other) {
-    value = other.value;
-    if (default_initialized) ++value;  // Bad move if lhs is default initialized
-    return *this;
-  }
-
-  friend bool operator==(const BadDefaultInitializedCopyAssign& lhs,
-                         const BadDefaultInitializedCopyAssign& rhs) {
-    return lhs.value == rhs.value;
-  }
-
-  friend bool operator!=(const BadDefaultInitializedCopyAssign& lhs,
-                         const BadDefaultInitializedCopyAssign& rhs) {
-    return lhs.value != rhs.value;
-  }
-
-  bool default_initialized = false;
-  int value = 0;
-};
-
-TEST(ConformanceTestingDeathTest, DefaultInitializedAssignFailure) {
-  using profile = ti::CombineProfiles<ti::DefaultConstructibleValueProfile,
-                                      ti::EquatableProfile>;
-
-  {
-    ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadDefaultInitializedCopyAssign)
-        .DUE_TO("copy assignment")
-        .INITIALIZER(BadDefaultInitializedCopyAssign(0))
-        .WITH_LOOSE_PROFILE(profile);
-  }
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/types/internal/optional.h b/third_party/abseil/absl/types/internal/optional.h
deleted file mode 100644
index 92932b6..0000000
--- a/third_party/abseil/absl/types/internal/optional.h
+++ /dev/null
@@ -1,396 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#ifndef ABSL_TYPES_INTERNAL_OPTIONAL_H_
-#define ABSL_TYPES_INTERNAL_OPTIONAL_H_
-
-#include <functional>
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/inline_variable.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/utility/utility.h"
-
-// ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
-//
-// Inheriting constructors is supported in GCC 4.8+, Clang 3.3+ and MSVC 2015.
-// __cpp_inheriting_constructors is a predefined macro and a recommended way to
-// check for this language feature, but GCC doesn't support it until 5.0 and
-// Clang doesn't support it until 3.6.
-// Also, MSVC 2015 has a bug: it doesn't inherit the constexpr template
-// constructor. For example, the following code won't work on MSVC 2015 Update3:
-// struct Base {
-//   int t;
-//   template <typename T>
-//   constexpr Base(T t_) : t(t_) {}
-// };
-// struct Foo : Base {
-//   using Base::Base;
-// }
-// constexpr Foo foo(0);  // doesn't work on MSVC 2015
-#if defined(__clang__)
-#if __has_feature(cxx_inheriting_constructors)
-#define ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS 1
-#endif
-#elif (defined(__GNUC__) &&                                       \
-       (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 8)) || \
-    (__cpp_inheriting_constructors >= 200802) ||                  \
-    (defined(_MSC_VER) && _MSC_VER >= 1910)
-#define ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS 1
-#endif
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// Forward declaration
-template <typename T>
-class optional;
-
-namespace optional_internal {
-
-// This tag type is used as a constructor parameter type for `nullopt_t`.
-struct init_t {
-  explicit init_t() = default;
-};
-
-struct empty_struct {};
-
-// This class stores the data in optional<T>.
-// It is specialized based on whether T is trivially destructible.
-// This is the specialization for non trivially destructible type.
-template <typename T, bool unused = std::is_trivially_destructible<T>::value>
-class optional_data_dtor_base {
-  struct dummy_type {
-    static_assert(sizeof(T) % sizeof(empty_struct) == 0, "");
-    // Use an array to avoid GCC 6 placement-new warning.
-    empty_struct data[sizeof(T) / sizeof(empty_struct)];
-  };
-
- protected:
-  // Whether there is data or not.
-  bool engaged_;
-  // Data storage
-  union {
-    T data_;
-    dummy_type dummy_;
-  };
-
-  void destruct() noexcept {
-    if (engaged_) {
-      data_.~T();
-      engaged_ = false;
-    }
-  }
-
-  // dummy_ must be initialized for constexpr constructor.
-  constexpr optional_data_dtor_base() noexcept : engaged_(false), dummy_{{}} {}
-
-  template <typename... Args>
-  constexpr explicit optional_data_dtor_base(in_place_t, Args&&... args)
-      : engaged_(true), data_(absl::forward<Args>(args)...) {}
-
-  ~optional_data_dtor_base() { destruct(); }
-};
-
-// Specialization for trivially destructible type.
-template <typename T>
-class optional_data_dtor_base<T, true> {
-  struct dummy_type {
-    static_assert(sizeof(T) % sizeof(empty_struct) == 0, "");
-    // Use array to avoid GCC 6 placement-new warning.
-    empty_struct data[sizeof(T) / sizeof(empty_struct)];
-  };
-
- protected:
-  // Whether there is data or not.
-  bool engaged_;
-  // Data storage
-  union {
-    T data_;
-    dummy_type dummy_;
-  };
-  void destruct() noexcept { engaged_ = false; }
-
-  // dummy_ must be initialized for constexpr constructor.
-  constexpr optional_data_dtor_base() noexcept : engaged_(false), dummy_{{}} {}
-
-  template <typename... Args>
-  constexpr explicit optional_data_dtor_base(in_place_t, Args&&... args)
-      : engaged_(true), data_(absl::forward<Args>(args)...) {}
-};
-
-template <typename T>
-class optional_data_base : public optional_data_dtor_base<T> {
- protected:
-  using base = optional_data_dtor_base<T>;
-#ifdef ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
-  using base::base;
-#else
-  optional_data_base() = default;
-
-  template <typename... Args>
-  constexpr explicit optional_data_base(in_place_t t, Args&&... args)
-      : base(t, absl::forward<Args>(args)...) {}
-#endif
-
-  template <typename... Args>
-  void construct(Args&&... args) {
-    // Use dummy_'s address to work around casting cv-qualified T* to void*.
-    ::new (static_cast<void*>(&this->dummy_)) T(std::forward<Args>(args)...);
-    this->engaged_ = true;
-  }
-
-  template <typename U>
-  void assign(U&& u) {
-    if (this->engaged_) {
-      this->data_ = std::forward<U>(u);
-    } else {
-      construct(std::forward<U>(u));
-    }
-  }
-};
-
-// TODO(absl-team): Add another class using
-// std::is_trivially_move_constructible trait when available to match
-// http://cplusplus.github.io/LWG/lwg-defects.html#2900, for types that
-// have trivial move but nontrivial copy.
-// Also, we should be checking is_trivially_copyable here, which is not
-// supported now, so we use is_trivially_* traits instead.
-template <typename T,
-          bool unused = absl::is_trivially_copy_constructible<T>::value&&
-              absl::is_trivially_copy_assignable<typename std::remove_cv<
-                  T>::type>::value&& std::is_trivially_destructible<T>::value>
-class optional_data;
-
-// Trivially copyable types
-template <typename T>
-class optional_data<T, true> : public optional_data_base<T> {
- protected:
-#ifdef ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
-  using optional_data_base<T>::optional_data_base;
-#else
-  optional_data() = default;
-
-  template <typename... Args>
-  constexpr explicit optional_data(in_place_t t, Args&&... args)
-      : optional_data_base<T>(t, absl::forward<Args>(args)...) {}
-#endif
-};
-
-template <typename T>
-class optional_data<T, false> : public optional_data_base<T> {
- protected:
-#ifdef ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
-  using optional_data_base<T>::optional_data_base;
-#else
-  template <typename... Args>
-  constexpr explicit optional_data(in_place_t t, Args&&... args)
-      : optional_data_base<T>(t, absl::forward<Args>(args)...) {}
-#endif
-
-  optional_data() = default;
-
-  optional_data(const optional_data& rhs) : optional_data_base<T>() {
-    if (rhs.engaged_) {
-      this->construct(rhs.data_);
-    }
-  }
-
-  optional_data(optional_data&& rhs) noexcept(
-      absl::default_allocator_is_nothrow::value ||
-      std::is_nothrow_move_constructible<T>::value)
-      : optional_data_base<T>() {
-    if (rhs.engaged_) {
-      this->construct(std::move(rhs.data_));
-    }
-  }
-
-  optional_data& operator=(const optional_data& rhs) {
-    if (rhs.engaged_) {
-      this->assign(rhs.data_);
-    } else {
-      this->destruct();
-    }
-    return *this;
-  }
-
-  optional_data& operator=(optional_data&& rhs) noexcept(
-      std::is_nothrow_move_assignable<T>::value&&
-          std::is_nothrow_move_constructible<T>::value) {
-    if (rhs.engaged_) {
-      this->assign(std::move(rhs.data_));
-    } else {
-      this->destruct();
-    }
-    return *this;
-  }
-};
-
-// Ordered by level of restriction, from low to high.
-// Copyable implies movable.
-enum class copy_traits { copyable = 0, movable = 1, non_movable = 2 };
-
-// Base class for enabling/disabling copy/move constructor.
-template <copy_traits>
-class optional_ctor_base;
-
-template <>
-class optional_ctor_base<copy_traits::copyable> {
- public:
-  constexpr optional_ctor_base() = default;
-  optional_ctor_base(const optional_ctor_base&) = default;
-  optional_ctor_base(optional_ctor_base&&) = default;
-  optional_ctor_base& operator=(const optional_ctor_base&) = default;
-  optional_ctor_base& operator=(optional_ctor_base&&) = default;
-};
-
-template <>
-class optional_ctor_base<copy_traits::movable> {
- public:
-  constexpr optional_ctor_base() = default;
-  optional_ctor_base(const optional_ctor_base&) = delete;
-  optional_ctor_base(optional_ctor_base&&) = default;
-  optional_ctor_base& operator=(const optional_ctor_base&) = default;
-  optional_ctor_base& operator=(optional_ctor_base&&) = default;
-};
-
-template <>
-class optional_ctor_base<copy_traits::non_movable> {
- public:
-  constexpr optional_ctor_base() = default;
-  optional_ctor_base(const optional_ctor_base&) = delete;
-  optional_ctor_base(optional_ctor_base&&) = delete;
-  optional_ctor_base& operator=(const optional_ctor_base&) = default;
-  optional_ctor_base& operator=(optional_ctor_base&&) = default;
-};
-
-// Base class for enabling/disabling copy/move assignment.
-template <copy_traits>
-class optional_assign_base;
-
-template <>
-class optional_assign_base<copy_traits::copyable> {
- public:
-  constexpr optional_assign_base() = default;
-  optional_assign_base(const optional_assign_base&) = default;
-  optional_assign_base(optional_assign_base&&) = default;
-  optional_assign_base& operator=(const optional_assign_base&) = default;
-  optional_assign_base& operator=(optional_assign_base&&) = default;
-};
-
-template <>
-class optional_assign_base<copy_traits::movable> {
- public:
-  constexpr optional_assign_base() = default;
-  optional_assign_base(const optional_assign_base&) = default;
-  optional_assign_base(optional_assign_base&&) = default;
-  optional_assign_base& operator=(const optional_assign_base&) = delete;
-  optional_assign_base& operator=(optional_assign_base&&) = default;
-};
-
-template <>
-class optional_assign_base<copy_traits::non_movable> {
- public:
-  constexpr optional_assign_base() = default;
-  optional_assign_base(const optional_assign_base&) = default;
-  optional_assign_base(optional_assign_base&&) = default;
-  optional_assign_base& operator=(const optional_assign_base&) = delete;
-  optional_assign_base& operator=(optional_assign_base&&) = delete;
-};
-
-template <typename T>
-struct ctor_copy_traits {
-  static constexpr copy_traits traits =
-      std::is_copy_constructible<T>::value
-          ? copy_traits::copyable
-          : std::is_move_constructible<T>::value ? copy_traits::movable
-                                                 : copy_traits::non_movable;
-};
-
-template <typename T>
-struct assign_copy_traits {
-  static constexpr copy_traits traits =
-      absl::is_copy_assignable<T>::value && std::is_copy_constructible<T>::value
-          ? copy_traits::copyable
-          : absl::is_move_assignable<T>::value &&
-                    std::is_move_constructible<T>::value
-                ? copy_traits::movable
-                : copy_traits::non_movable;
-};
-
-// Whether T is constructible or convertible from optional<U>.
-template <typename T, typename U>
-struct is_constructible_convertible_from_optional
-    : std::integral_constant<
-          bool, std::is_constructible<T, optional<U>&>::value ||
-                    std::is_constructible<T, optional<U>&&>::value ||
-                    std::is_constructible<T, const optional<U>&>::value ||
-                    std::is_constructible<T, const optional<U>&&>::value ||
-                    std::is_convertible<optional<U>&, T>::value ||
-                    std::is_convertible<optional<U>&&, T>::value ||
-                    std::is_convertible<const optional<U>&, T>::value ||
-                    std::is_convertible<const optional<U>&&, T>::value> {};
-
-// Whether T is constructible or convertible or assignable from optional<U>.
-template <typename T, typename U>
-struct is_constructible_convertible_assignable_from_optional
-    : std::integral_constant<
-          bool, is_constructible_convertible_from_optional<T, U>::value ||
-                    std::is_assignable<T&, optional<U>&>::value ||
-                    std::is_assignable<T&, optional<U>&&>::value ||
-                    std::is_assignable<T&, const optional<U>&>::value ||
-                    std::is_assignable<T&, const optional<U>&&>::value> {};
-
-// Helper function used by [optional.relops], [optional.comp_with_t],
-// for checking whether an expression is convertible to bool.
-bool convertible_to_bool(bool);
-
-// Base class for std::hash<absl::optional<T>>:
-// If std::hash<std::remove_const_t<T>> is enabled, it provides operator() to
-// compute the hash; Otherwise, it is disabled.
-// Reference N4659 23.14.15 [unord.hash].
-template <typename T, typename = size_t>
-struct optional_hash_base {
-  optional_hash_base() = delete;
-  optional_hash_base(const optional_hash_base&) = delete;
-  optional_hash_base(optional_hash_base&&) = delete;
-  optional_hash_base& operator=(const optional_hash_base&) = delete;
-  optional_hash_base& operator=(optional_hash_base&&) = delete;
-};
-
-template <typename T>
-struct optional_hash_base<T, decltype(std::hash<absl::remove_const_t<T> >()(
-                                 std::declval<absl::remove_const_t<T> >()))> {
-  using argument_type = absl::optional<T>;
-  using result_type = size_t;
-  size_t operator()(const absl::optional<T>& opt) const {
-    absl::type_traits_internal::AssertHashEnabled<absl::remove_const_t<T>>();
-    if (opt) {
-      return std::hash<absl::remove_const_t<T> >()(*opt);
-    } else {
-      return static_cast<size_t>(0x297814aaad196e6dULL);
-    }
-  }
-};
-
-}  // namespace optional_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#undef ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
-
-#endif  // ABSL_TYPES_INTERNAL_OPTIONAL_H_
diff --git a/third_party/abseil/absl/types/internal/parentheses.h b/third_party/abseil/absl/types/internal/parentheses.h
deleted file mode 100644
index 5aebee8..0000000
--- a/third_party/abseil/absl/types/internal/parentheses.h
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// parentheses.h
-// -----------------------------------------------------------------------------
-//
-// This file contains macros that expand to a left parenthesis and a right
-// parenthesis. These are in their own file and are generated from macros
-// because otherwise clang-format gets confused and clang-format off directives
-// do not help.
-//
-// The parentheses macros are used when wanting to require a rescan before
-// expansion of parenthesized text appearing after a function-style macro name.
-
-#ifndef ABSL_TYPES_INTERNAL_PARENTHESES_H_
-#define ABSL_TYPES_INTERNAL_PARENTHESES_H_
-
-#define ABSL_INTERNAL_LPAREN (
-
-#define ABSL_INTERNAL_RPAREN )
-
-#endif  // ABSL_TYPES_INTERNAL_PARENTHESES_H_
diff --git a/third_party/abseil/absl/types/internal/span.h b/third_party/abseil/absl/types/internal/span.h
deleted file mode 100644
index 112612f..0000000
--- a/third_party/abseil/absl/types/internal/span.h
+++ /dev/null
@@ -1,128 +0,0 @@
-//
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-#ifndef ABSL_TYPES_INTERNAL_SPAN_H_
-#define ABSL_TYPES_INTERNAL_SPAN_H_
-
-#include <algorithm>
-#include <cstddef>
-#include <string>
-#include <type_traits>
-
-#include "absl/algorithm/algorithm.h"
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace span_internal {
-// A constexpr min function
-constexpr size_t Min(size_t a, size_t b) noexcept { return a < b ? a : b; }
-
-// Wrappers for access to container data pointers.
-template <typename C>
-constexpr auto GetDataImpl(C& c, char) noexcept  // NOLINT(runtime/references)
-    -> decltype(c.data()) {
-  return c.data();
-}
-
-// Before C++17, std::string::data returns a const char* in all cases.
-inline char* GetDataImpl(std::string& s,  // NOLINT(runtime/references)
-                         int) noexcept {
-  return &s[0];
-}
-
-template <typename C>
-constexpr auto GetData(C& c) noexcept  // NOLINT(runtime/references)
-    -> decltype(GetDataImpl(c, 0)) {
-  return GetDataImpl(c, 0);
-}
-
-// Detection idioms for size() and data().
-template <typename C>
-using HasSize =
-    std::is_integral<absl::decay_t<decltype(std::declval<C&>().size())>>;
-
-// We want to enable conversion from vector<T*> to Span<const T* const> but
-// disable conversion from vector<Derived> to Span<Base>. Here we use
-// the fact that U** is convertible to Q* const* if and only if Q is the same
-// type or a more cv-qualified version of U.  We also decay the result type of
-// data() to avoid problems with classes which have a member function data()
-// which returns a reference.
-template <typename T, typename C>
-using HasData =
-    std::is_convertible<absl::decay_t<decltype(GetData(std::declval<C&>()))>*,
-                        T* const*>;
-
-// Extracts value type from a Container
-template <typename C>
-struct ElementType {
-  using type = typename absl::remove_reference_t<C>::value_type;
-};
-
-template <typename T, size_t N>
-struct ElementType<T (&)[N]> {
-  using type = T;
-};
-
-template <typename C>
-using ElementT = typename ElementType<C>::type;
-
-template <typename T>
-using EnableIfMutable =
-    typename std::enable_if<!std::is_const<T>::value, int>::type;
-
-template <template <typename> class SpanT, typename T>
-bool EqualImpl(SpanT<T> a, SpanT<T> b) {
-  static_assert(std::is_const<T>::value, "");
-  return absl::equal(a.begin(), a.end(), b.begin(), b.end());
-}
-
-template <template <typename> class SpanT, typename T>
-bool LessThanImpl(SpanT<T> a, SpanT<T> b) {
-  // We can't use value_type since that is remove_cv_t<T>, so we go the long way
-  // around.
-  static_assert(std::is_const<T>::value, "");
-  return std::lexicographical_compare(a.begin(), a.end(), b.begin(), b.end());
-}
-
-// The `IsConvertible` classes here are needed because of the
-// `std::is_convertible` bug in libcxx when compiled with GCC. This build
-// configuration is used by Android NDK toolchain. Reference link:
-// https://bugs.llvm.org/show_bug.cgi?id=27538.
-template <typename From, typename To>
-struct IsConvertibleHelper {
- private:
-  static std::true_type testval(To);
-  static std::false_type testval(...);
-
- public:
-  using type = decltype(testval(std::declval<From>()));
-};
-
-template <typename From, typename To>
-struct IsConvertible : IsConvertibleHelper<From, To>::type {};
-
-// TODO(zhangxy): replace `IsConvertible` with `std::is_convertible` once the
-// older version of libcxx is not supported.
-template <typename From, typename To>
-using EnableIfConvertibleTo =
-    typename std::enable_if<IsConvertible<From, To>::value>::type;
-}  // namespace span_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TYPES_INTERNAL_SPAN_H_
diff --git a/third_party/abseil/absl/types/internal/transform_args.h b/third_party/abseil/absl/types/internal/transform_args.h
deleted file mode 100644
index 4a0ab42..0000000
--- a/third_party/abseil/absl/types/internal/transform_args.h
+++ /dev/null
@@ -1,246 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// transform_args.h
-// -----------------------------------------------------------------------------
-//
-// This file contains a higher-order macro that "transforms" each element of a
-// a variadic argument by a provided secondary macro.
-
-#ifndef ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
-#define ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
-
-//
-// ABSL_INTERNAL_CAT(a, b)
-//
-// This macro takes two arguments and concatenates them together via ## after
-// expansion.
-//
-// Example:
-//
-//   ABSL_INTERNAL_CAT(foo_, bar)
-//
-// Results in:
-//
-//   foo_bar
-#define ABSL_INTERNAL_CAT(a, b) ABSL_INTERNAL_CAT_IMPL(a, b)
-#define ABSL_INTERNAL_CAT_IMPL(a, b) a##b
-
-//
-// ABSL_INTERNAL_TRANSFORM_ARGS(m, ...)
-//
-// This macro takes another macro as an argument followed by a trailing series
-// of additional parameters (up to 32 additional arguments). It invokes the
-// passed-in macro once for each of the additional arguments, with the
-// expansions separated by commas.
-//
-// Example:
-//
-//   ABSL_INTERNAL_TRANSFORM_ARGS(MY_MACRO, a, b, c)
-//
-// Results in:
-//
-//   MY_MACRO(a), MY_MACRO(b), MY_MACRO(c)
-//
-// TODO(calabrese) Handle no arguments as a special case.
-#define ABSL_INTERNAL_TRANSFORM_ARGS(m, ...)             \
-  ABSL_INTERNAL_CAT(ABSL_INTERNAL_TRANSFORM_ARGS,        \
-                    ABSL_INTERNAL_NUM_ARGS(__VA_ARGS__)) \
-  (m, __VA_ARGS__)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS1(m, a0) m(a0)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS2(m, a0, a1) m(a0), m(a1)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS3(m, a0, a1, a2) m(a0), m(a1), m(a2)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS4(m, a0, a1, a2, a3) \
-  m(a0), m(a1), m(a2), m(a3)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS5(m, a0, a1, a2, a3, a4) \
-  m(a0), m(a1), m(a2), m(a3), m(a4)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS6(m, a0, a1, a2, a3, a4, a5) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS7(m, a0, a1, a2, a3, a4, a5, a6) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS8(m, a0, a1, a2, a3, a4, a5, a6, a7) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS9(m, a0, a1, a2, a3, a4, a5, a6, a7, a8) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS10(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9)                                    \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS11(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10)                               \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), m(a10)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS12(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11)                          \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS13(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12)                     \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS14(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13)                \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS15(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14)           \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS16(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15)      \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS17(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS18(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17)                                   \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS19(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17, a18)                              \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS20(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17, a18, a19)                         \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS21(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17, a18, a19, a20)                    \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS22(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17, a18, a19, a20, a21)               \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS23(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17, a18, a19, a20, a21, a22)          \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS24(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
-                                       a9, a10, a11, a12, a13, a14, a15, a16, \
-                                       a17, a18, a19, a20, a21, a22, a23)     \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22), m(a23)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS25(m, a0, a1, a2, a3, a4, a5, a6, a7, a8,  \
-                                       a9, a10, a11, a12, a13, a14, a15, a16,  \
-                                       a17, a18, a19, a20, a21, a22, a23, a24) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),        \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18),  \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS26(                                       \
-    m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,  \
-    a16, a17, a18, a19, a20, a21, a22, a23, a24, a25)                         \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS27(                                       \
-    m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,  \
-    a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26)                    \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS28(                                       \
-    m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,  \
-    a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27)               \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS29(                                       \
-    m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,  \
-    a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28)          \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
-      m(a28)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS30(                                       \
-    m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,  \
-    a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29)     \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),       \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
-      m(a28), m(a29)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS31(                                        \
-    m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15,   \
-    a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30) \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),        \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18),  \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27),  \
-      m(a28), m(a29), m(a30)
-
-#define ABSL_INTERNAL_TRANSFORM_ARGS32(m, a0, a1, a2, a3, a4, a5, a6, a7, a8,  \
-                                       a9, a10, a11, a12, a13, a14, a15, a16,  \
-                                       a17, a18, a19, a20, a21, a22, a23, a24, \
-                                       a25, a26, a27, a28, a29, a30, a31)      \
-  m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9),        \
-      m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18),  \
-      m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27),  \
-      m(a28), m(a29), m(a30), m(a31)
-
-#define ABSL_INTERNAL_NUM_ARGS_IMPL(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9,    \
-                                    a10, a11, a12, a13, a14, a15, a16, a17,    \
-                                    a18, a19, a20, a21, a22, a23, a24, a25,    \
-                                    a26, a27, a28, a29, a30, a31, result, ...) \
-  result
-
-#define ABSL_INTERNAL_FORCE_EXPANSION(...) __VA_ARGS__
-
-#define ABSL_INTERNAL_NUM_ARGS(...)                                            \
-  ABSL_INTERNAL_FORCE_EXPANSION(ABSL_INTERNAL_NUM_ARGS_IMPL(                   \
-      __VA_ARGS__, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, \
-      17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, ))
-
-#endif  // ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
diff --git a/third_party/abseil/absl/types/internal/variant.h b/third_party/abseil/absl/types/internal/variant.h
deleted file mode 100644
index 772008c..0000000
--- a/third_party/abseil/absl/types/internal/variant.h
+++ /dev/null
@@ -1,1646 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Implementation details of absl/types/variant.h, pulled into a
-// separate file to avoid cluttering the top of the API header with
-// implementation details.
-
-#ifndef ABSL_TYPES_variant_internal_H_
-#define ABSL_TYPES_variant_internal_H_
-
-#include <cassert>
-#include <cstddef>
-#include <cstdlib>
-#include <memory>
-#include <stdexcept>
-#include <tuple>
-#include <type_traits>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/identity.h"
-#include "absl/base/internal/inline_variable.h"
-#include "absl/base/internal/invoke.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/bad_variant_access.h"
-#include "absl/utility/utility.h"
-
-#if !defined(ABSL_USES_STD_VARIANT)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-template <class... Types>
-class variant;
-
-ABSL_INTERNAL_INLINE_CONSTEXPR(size_t, variant_npos, static_cast<size_t>(-1));
-
-template <class T>
-struct variant_size;
-
-template <std::size_t I, class T>
-struct variant_alternative;
-
-namespace variant_internal {
-
-// NOTE: See specializations below for details.
-template <std::size_t I, class T>
-struct VariantAlternativeSfinae {};
-
-// Requires: I < variant_size_v<T>.
-//
-// Value: The Ith type of Types...
-template <std::size_t I, class T0, class... Tn>
-struct VariantAlternativeSfinae<I, variant<T0, Tn...>>
-    : VariantAlternativeSfinae<I - 1, variant<Tn...>> {};
-
-// Value: T0
-template <class T0, class... Ts>
-struct VariantAlternativeSfinae<0, variant<T0, Ts...>> {
-  using type = T0;
-};
-
-template <std::size_t I, class T>
-using VariantAlternativeSfinaeT = typename VariantAlternativeSfinae<I, T>::type;
-
-// NOTE: Requires T to be a reference type.
-template <class T, class U>
-struct GiveQualsTo;
-
-template <class T, class U>
-struct GiveQualsTo<T&, U> {
-  using type = U&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<T&&, U> {
-  using type = U&&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<const T&, U> {
-  using type = const U&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<const T&&, U> {
-  using type = const U&&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<volatile T&, U> {
-  using type = volatile U&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<volatile T&&, U> {
-  using type = volatile U&&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<volatile const T&, U> {
-  using type = volatile const U&;
-};
-
-template <class T, class U>
-struct GiveQualsTo<volatile const T&&, U> {
-  using type = volatile const U&&;
-};
-
-template <class T, class U>
-using GiveQualsToT = typename GiveQualsTo<T, U>::type;
-
-// Convenience alias, since size_t integral_constant is used a lot in this file.
-template <std::size_t I>
-using SizeT = std::integral_constant<std::size_t, I>;
-
-using NPos = SizeT<variant_npos>;
-
-template <class Variant, class T, class = void>
-struct IndexOfConstructedType {};
-
-template <std::size_t I, class Variant>
-struct VariantAccessResultImpl;
-
-template <std::size_t I, template <class...> class Variantemplate, class... T>
-struct VariantAccessResultImpl<I, Variantemplate<T...>&> {
-  using type = typename absl::variant_alternative<I, variant<T...>>::type&;
-};
-
-template <std::size_t I, template <class...> class Variantemplate, class... T>
-struct VariantAccessResultImpl<I, const Variantemplate<T...>&> {
-  using type =
-      const typename absl::variant_alternative<I, variant<T...>>::type&;
-};
-
-template <std::size_t I, template <class...> class Variantemplate, class... T>
-struct VariantAccessResultImpl<I, Variantemplate<T...>&&> {
-  using type = typename absl::variant_alternative<I, variant<T...>>::type&&;
-};
-
-template <std::size_t I, template <class...> class Variantemplate, class... T>
-struct VariantAccessResultImpl<I, const Variantemplate<T...>&&> {
-  using type =
-      const typename absl::variant_alternative<I, variant<T...>>::type&&;
-};
-
-template <std::size_t I, class Variant>
-using VariantAccessResult =
-    typename VariantAccessResultImpl<I, Variant&&>::type;
-
-// NOTE: This is used instead of std::array to reduce instantiation overhead.
-template <class T, std::size_t Size>
-struct SimpleArray {
-  static_assert(Size != 0, "");
-  T value[Size];
-};
-
-template <class T>
-struct AccessedType {
-  using type = T;
-};
-
-template <class T>
-using AccessedTypeT = typename AccessedType<T>::type;
-
-template <class T, std::size_t Size>
-struct AccessedType<SimpleArray<T, Size>> {
-  using type = AccessedTypeT<T>;
-};
-
-template <class T>
-constexpr T AccessSimpleArray(const T& value) {
-  return value;
-}
-
-template <class T, std::size_t Size, class... SizeT>
-constexpr AccessedTypeT<T> AccessSimpleArray(const SimpleArray<T, Size>& table,
-                                             std::size_t head_index,
-                                             SizeT... tail_indices) {
-  return AccessSimpleArray(table.value[head_index], tail_indices...);
-}
-
-// Note: Intentionally is an alias.
-template <class T>
-using AlwaysZero = SizeT<0>;
-
-template <class Op, class... Vs>
-struct VisitIndicesResultImpl {
-  using type = absl::result_of_t<Op(AlwaysZero<Vs>...)>;
-};
-
-template <class Op, class... Vs>
-using VisitIndicesResultT = typename VisitIndicesResultImpl<Op, Vs...>::type;
-
-template <class ReturnType, class FunctionObject, class EndIndices,
-          class BoundIndices>
-struct MakeVisitationMatrix;
-
-template <class ReturnType, class FunctionObject, std::size_t... Indices>
-constexpr ReturnType call_with_indices(FunctionObject&& function) {
-  static_assert(
-      std::is_same<ReturnType, decltype(std::declval<FunctionObject>()(
-                                   SizeT<Indices>()...))>::value,
-      "Not all visitation overloads have the same return type.");
-  return absl::forward<FunctionObject>(function)(SizeT<Indices>()...);
-}
-
-template <class ReturnType, class FunctionObject, std::size_t... BoundIndices>
-struct MakeVisitationMatrix<ReturnType, FunctionObject, index_sequence<>,
-                            index_sequence<BoundIndices...>> {
-  using ResultType = ReturnType (*)(FunctionObject&&);
-  static constexpr ResultType Run() {
-    return &call_with_indices<ReturnType, FunctionObject,
-                              (BoundIndices - 1)...>;
-  }
-};
-
-template <typename Is, std::size_t J>
-struct AppendToIndexSequence;
-
-template <typename Is, std::size_t J>
-using AppendToIndexSequenceT = typename AppendToIndexSequence<Is, J>::type;
-
-template <std::size_t... Is, std::size_t J>
-struct AppendToIndexSequence<index_sequence<Is...>, J> {
-  using type = index_sequence<Is..., J>;
-};
-
-template <class ReturnType, class FunctionObject, class EndIndices,
-          class CurrIndices, class BoundIndices>
-struct MakeVisitationMatrixImpl;
-
-template <class ReturnType, class FunctionObject, class EndIndices,
-          std::size_t... CurrIndices, class BoundIndices>
-struct MakeVisitationMatrixImpl<ReturnType, FunctionObject, EndIndices,
-                                index_sequence<CurrIndices...>, BoundIndices> {
-  using ResultType = SimpleArray<
-      typename MakeVisitationMatrix<ReturnType, FunctionObject, EndIndices,
-                                    index_sequence<>>::ResultType,
-      sizeof...(CurrIndices)>;
-
-  static constexpr ResultType Run() {
-    return {{MakeVisitationMatrix<
-        ReturnType, FunctionObject, EndIndices,
-        AppendToIndexSequenceT<BoundIndices, CurrIndices>>::Run()...}};
-  }
-};
-
-template <class ReturnType, class FunctionObject, std::size_t HeadEndIndex,
-          std::size_t... TailEndIndices, std::size_t... BoundIndices>
-struct MakeVisitationMatrix<ReturnType, FunctionObject,
-                            index_sequence<HeadEndIndex, TailEndIndices...>,
-                            index_sequence<BoundIndices...>>
-    : MakeVisitationMatrixImpl<ReturnType, FunctionObject,
-                               index_sequence<TailEndIndices...>,
-                               absl::make_index_sequence<HeadEndIndex>,
-                               index_sequence<BoundIndices...>> {};
-
-struct UnreachableSwitchCase {
-  template <class Op>
-  [[noreturn]] static VisitIndicesResultT<Op, std::size_t> Run(
-      Op&& /*ignored*/) {
-#if ABSL_HAVE_BUILTIN(__builtin_unreachable) || \
-    (defined(__GNUC__) && !defined(__clang__))
-    __builtin_unreachable();
-#elif defined(_MSC_VER)
-    __assume(false);
-#else
-    // Try to use assert of false being identified as an unreachable intrinsic.
-    // NOTE: We use assert directly to increase chances of exploiting an assume
-    //       intrinsic.
-    assert(false);  // NOLINT
-
-    // Hack to silence potential no return warning -- cause an infinite loop.
-    return Run(absl::forward<Op>(op));
-#endif  // Checks for __builtin_unreachable
-  }
-};
-
-template <class Op, std::size_t I>
-struct ReachableSwitchCase {
-  static VisitIndicesResultT<Op, std::size_t> Run(Op&& op) {
-    return absl::base_internal::invoke(absl::forward<Op>(op), SizeT<I>());
-  }
-};
-
-// The number 33 is just a guess at a reasonable maximum to our switch. It is
-// not based on any analysis. The reason it is a power of 2 plus 1 instead of a
-// power of 2 is because the number was picked to correspond to a power of 2
-// amount of "normal" alternatives, plus one for the possibility of the user
-// providing "monostate" in addition to the more natural alternatives.
-ABSL_INTERNAL_INLINE_CONSTEXPR(std::size_t, MaxUnrolledVisitCases, 33);
-
-// Note: The default-definition is for unreachable cases.
-template <bool IsReachable>
-struct PickCaseImpl {
-  template <class Op, std::size_t I>
-  using Apply = UnreachableSwitchCase;
-};
-
-template <>
-struct PickCaseImpl</*IsReachable =*/true> {
-  template <class Op, std::size_t I>
-  using Apply = ReachableSwitchCase<Op, I>;
-};
-
-// Note: This form of dance with template aliases is to make sure that we
-//       instantiate a number of templates proportional to the number of variant
-//       alternatives rather than a number of templates proportional to our
-//       maximum unrolled amount of visitation cases (aliases are effectively
-//       "free" whereas other template instantiations are costly).
-template <class Op, std::size_t I, std::size_t EndIndex>
-using PickCase = typename PickCaseImpl<(I < EndIndex)>::template Apply<Op, I>;
-
-template <class ReturnType>
-[[noreturn]] ReturnType TypedThrowBadVariantAccess() {
-  absl::variant_internal::ThrowBadVariantAccess();
-}
-
-// Given N variant sizes, determine the number of cases there would need to be
-// in a single switch-statement that would cover every possibility in the
-// corresponding N-ary visit operation.
-template <std::size_t... NumAlternatives>
-struct NumCasesOfSwitch;
-
-template <std::size_t HeadNumAlternatives, std::size_t... TailNumAlternatives>
-struct NumCasesOfSwitch<HeadNumAlternatives, TailNumAlternatives...> {
-  static constexpr std::size_t value =
-      (HeadNumAlternatives + 1) *
-      NumCasesOfSwitch<TailNumAlternatives...>::value;
-};
-
-template <>
-struct NumCasesOfSwitch<> {
-  static constexpr std::size_t value = 1;
-};
-
-// A switch statement optimizes better than the table of function pointers.
-template <std::size_t EndIndex>
-struct VisitIndicesSwitch {
-  static_assert(EndIndex <= MaxUnrolledVisitCases,
-                "Maximum unrolled switch size exceeded.");
-
-  template <class Op>
-  static VisitIndicesResultT<Op, std::size_t> Run(Op&& op, std::size_t i) {
-    switch (i) {
-      case 0:
-        return PickCase<Op, 0, EndIndex>::Run(absl::forward<Op>(op));
-      case 1:
-        return PickCase<Op, 1, EndIndex>::Run(absl::forward<Op>(op));
-      case 2:
-        return PickCase<Op, 2, EndIndex>::Run(absl::forward<Op>(op));
-      case 3:
-        return PickCase<Op, 3, EndIndex>::Run(absl::forward<Op>(op));
-      case 4:
-        return PickCase<Op, 4, EndIndex>::Run(absl::forward<Op>(op));
-      case 5:
-        return PickCase<Op, 5, EndIndex>::Run(absl::forward<Op>(op));
-      case 6:
-        return PickCase<Op, 6, EndIndex>::Run(absl::forward<Op>(op));
-      case 7:
-        return PickCase<Op, 7, EndIndex>::Run(absl::forward<Op>(op));
-      case 8:
-        return PickCase<Op, 8, EndIndex>::Run(absl::forward<Op>(op));
-      case 9:
-        return PickCase<Op, 9, EndIndex>::Run(absl::forward<Op>(op));
-      case 10:
-        return PickCase<Op, 10, EndIndex>::Run(absl::forward<Op>(op));
-      case 11:
-        return PickCase<Op, 11, EndIndex>::Run(absl::forward<Op>(op));
-      case 12:
-        return PickCase<Op, 12, EndIndex>::Run(absl::forward<Op>(op));
-      case 13:
-        return PickCase<Op, 13, EndIndex>::Run(absl::forward<Op>(op));
-      case 14:
-        return PickCase<Op, 14, EndIndex>::Run(absl::forward<Op>(op));
-      case 15:
-        return PickCase<Op, 15, EndIndex>::Run(absl::forward<Op>(op));
-      case 16:
-        return PickCase<Op, 16, EndIndex>::Run(absl::forward<Op>(op));
-      case 17:
-        return PickCase<Op, 17, EndIndex>::Run(absl::forward<Op>(op));
-      case 18:
-        return PickCase<Op, 18, EndIndex>::Run(absl::forward<Op>(op));
-      case 19:
-        return PickCase<Op, 19, EndIndex>::Run(absl::forward<Op>(op));
-      case 20:
-        return PickCase<Op, 20, EndIndex>::Run(absl::forward<Op>(op));
-      case 21:
-        return PickCase<Op, 21, EndIndex>::Run(absl::forward<Op>(op));
-      case 22:
-        return PickCase<Op, 22, EndIndex>::Run(absl::forward<Op>(op));
-      case 23:
-        return PickCase<Op, 23, EndIndex>::Run(absl::forward<Op>(op));
-      case 24:
-        return PickCase<Op, 24, EndIndex>::Run(absl::forward<Op>(op));
-      case 25:
-        return PickCase<Op, 25, EndIndex>::Run(absl::forward<Op>(op));
-      case 26:
-        return PickCase<Op, 26, EndIndex>::Run(absl::forward<Op>(op));
-      case 27:
-        return PickCase<Op, 27, EndIndex>::Run(absl::forward<Op>(op));
-      case 28:
-        return PickCase<Op, 28, EndIndex>::Run(absl::forward<Op>(op));
-      case 29:
-        return PickCase<Op, 29, EndIndex>::Run(absl::forward<Op>(op));
-      case 30:
-        return PickCase<Op, 30, EndIndex>::Run(absl::forward<Op>(op));
-      case 31:
-        return PickCase<Op, 31, EndIndex>::Run(absl::forward<Op>(op));
-      case 32:
-        return PickCase<Op, 32, EndIndex>::Run(absl::forward<Op>(op));
-      default:
-        ABSL_ASSERT(i == variant_npos);
-        return absl::base_internal::invoke(absl::forward<Op>(op), NPos());
-    }
-  }
-};
-
-template <std::size_t... EndIndices>
-struct VisitIndicesFallback {
-  template <class Op, class... SizeT>
-  static VisitIndicesResultT<Op, SizeT...> Run(Op&& op, SizeT... indices) {
-    return AccessSimpleArray(
-        MakeVisitationMatrix<VisitIndicesResultT<Op, SizeT...>, Op,
-                             index_sequence<(EndIndices + 1)...>,
-                             index_sequence<>>::Run(),
-        (indices + 1)...)(absl::forward<Op>(op));
-  }
-};
-
-// Take an N-dimensional series of indices and convert them into a single index
-// without loss of information. The purpose of this is to be able to convert an
-// N-ary visit operation into a single switch statement.
-template <std::size_t...>
-struct FlattenIndices;
-
-template <std::size_t HeadSize, std::size_t... TailSize>
-struct FlattenIndices<HeadSize, TailSize...> {
-  template<class... SizeType>
-  static constexpr std::size_t Run(std::size_t head, SizeType... tail) {
-    return head + HeadSize * FlattenIndices<TailSize...>::Run(tail...);
-  }
-};
-
-template <>
-struct FlattenIndices<> {
-  static constexpr std::size_t Run() { return 0; }
-};
-
-// Take a single "flattened" index (flattened by FlattenIndices) and determine
-// the value of the index of one of the logically represented dimensions.
-template <std::size_t I, std::size_t IndexToGet, std::size_t HeadSize,
-          std::size_t... TailSize>
-struct UnflattenIndex {
-  static constexpr std::size_t value =
-      UnflattenIndex<I / HeadSize, IndexToGet - 1, TailSize...>::value;
-};
-
-template <std::size_t I, std::size_t HeadSize, std::size_t... TailSize>
-struct UnflattenIndex<I, 0, HeadSize, TailSize...> {
-  static constexpr std::size_t value = (I % HeadSize);
-};
-
-// The backend for converting an N-ary visit operation into a unary visit.
-template <class IndexSequence, std::size_t... EndIndices>
-struct VisitIndicesVariadicImpl;
-
-template <std::size_t... N, std::size_t... EndIndices>
-struct VisitIndicesVariadicImpl<absl::index_sequence<N...>, EndIndices...> {
-  // A type that can take an N-ary function object and converts it to a unary
-  // function object that takes a single, flattened index, and "unflattens" it
-  // into its individual dimensions when forwarding to the wrapped object.
-  template <class Op>
-  struct FlattenedOp {
-    template <std::size_t I>
-    VisitIndicesResultT<Op, decltype(EndIndices)...> operator()(
-        SizeT<I> /*index*/) && {
-      return base_internal::invoke(
-          absl::forward<Op>(op),
-          SizeT<UnflattenIndex<I, N, (EndIndices + 1)...>::value -
-                std::size_t{1}>()...);
-    }
-
-    Op&& op;
-  };
-
-  template <class Op, class... SizeType>
-  static VisitIndicesResultT<Op, decltype(EndIndices)...> Run(
-      Op&& op, SizeType... i) {
-    return VisitIndicesSwitch<NumCasesOfSwitch<EndIndices...>::value>::Run(
-        FlattenedOp<Op>{absl::forward<Op>(op)},
-        FlattenIndices<(EndIndices + std::size_t{1})...>::Run(
-            (i + std::size_t{1})...));
-  }
-};
-
-template <std::size_t... EndIndices>
-struct VisitIndicesVariadic
-    : VisitIndicesVariadicImpl<absl::make_index_sequence<sizeof...(EndIndices)>,
-                               EndIndices...> {};
-
-// This implementation will flatten N-ary visit operations into a single switch
-// statement when the number of cases would be less than our maximum specified
-// switch-statement size.
-// TODO(calabrese)
-//   Based on benchmarks, determine whether the function table approach actually
-//   does optimize better than a chain of switch statements and possibly update
-//   the implementation accordingly. Also consider increasing the maximum switch
-//   size.
-template <std::size_t... EndIndices>
-struct VisitIndices
-    : absl::conditional_t<(NumCasesOfSwitch<EndIndices...>::value <=
-                           MaxUnrolledVisitCases),
-                          VisitIndicesVariadic<EndIndices...>,
-                          VisitIndicesFallback<EndIndices...>> {};
-
-template <std::size_t EndIndex>
-struct VisitIndices<EndIndex>
-    : absl::conditional_t<(EndIndex <= MaxUnrolledVisitCases),
-                          VisitIndicesSwitch<EndIndex>,
-                          VisitIndicesFallback<EndIndex>> {};
-
-// Suppress bogus warning on MSVC: MSVC complains that the `reinterpret_cast`
-// below is returning the address of a temporary or local object.
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4172)
-#endif  // _MSC_VER
-
-// TODO(calabrese) std::launder
-// TODO(calabrese) constexpr
-// NOTE: DO NOT REMOVE the `inline` keyword as it is necessary to work around a
-// MSVC bug. See https://github.com/abseil/abseil-cpp/issues/129 for details.
-template <class Self, std::size_t I>
-inline VariantAccessResult<I, Self> AccessUnion(Self&& self, SizeT<I> /*i*/) {
-  return reinterpret_cast<VariantAccessResult<I, Self>>(self);
-}
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif  // _MSC_VER
-
-template <class T>
-void DeducedDestroy(T& self) {  // NOLINT
-  self.~T();
-}
-
-// NOTE: This type exists as a single entity for variant and its bases to
-// befriend. It contains helper functionality that manipulates the state of the
-// variant, such as the implementation of things like assignment and emplace
-// operations.
-struct VariantCoreAccess {
-  template <class VariantType>
-  static typename VariantType::Variant& Derived(VariantType& self) {  // NOLINT
-    return static_cast<typename VariantType::Variant&>(self);
-  }
-
-  template <class VariantType>
-  static const typename VariantType::Variant& Derived(
-      const VariantType& self) {  // NOLINT
-    return static_cast<const typename VariantType::Variant&>(self);
-  }
-
-  template <class VariantType>
-  static void Destroy(VariantType& self) {  // NOLINT
-    Derived(self).destroy();
-    self.index_ = absl::variant_npos;
-  }
-
-  template <class Variant>
-  static void SetIndex(Variant& self, std::size_t i) {  // NOLINT
-    self.index_ = i;
-  }
-
-  template <class Variant>
-  static void InitFrom(Variant& self, Variant&& other) {  // NOLINT
-    VisitIndices<absl::variant_size<Variant>::value>::Run(
-        InitFromVisitor<Variant, Variant&&>{&self,
-                                            std::forward<Variant>(other)},
-        other.index());
-    self.index_ = other.index();
-  }
-
-  // Access a variant alternative, assuming the index is correct.
-  template <std::size_t I, class Variant>
-  static VariantAccessResult<I, Variant> Access(Variant&& self) {
-    // This cast instead of invocation of AccessUnion with an rvalue is a
-    // workaround for msvc. Without this there is a runtime failure when dealing
-    // with rvalues.
-    // TODO(calabrese) Reduce test case and find a simpler workaround.
-    return static_cast<VariantAccessResult<I, Variant>>(
-        variant_internal::AccessUnion(self.state_, SizeT<I>()));
-  }
-
-  // Access a variant alternative, throwing if the index is incorrect.
-  template <std::size_t I, class Variant>
-  static VariantAccessResult<I, Variant> CheckedAccess(Variant&& self) {
-    if (ABSL_PREDICT_FALSE(self.index_ != I)) {
-      TypedThrowBadVariantAccess<VariantAccessResult<I, Variant>>();
-    }
-
-    return Access<I>(absl::forward<Variant>(self));
-  }
-
-  // The implementation of the move-assignment operation for a variant.
-  template <class VType>
-  struct MoveAssignVisitor {
-    using DerivedType = typename VType::Variant;
-    template <std::size_t NewIndex>
-    void operator()(SizeT<NewIndex> /*new_i*/) const {
-      if (left->index_ == NewIndex) {
-        Access<NewIndex>(*left) = std::move(Access<NewIndex>(*right));
-      } else {
-        Derived(*left).template emplace<NewIndex>(
-            std::move(Access<NewIndex>(*right)));
-      }
-    }
-
-    void operator()(SizeT<absl::variant_npos> /*new_i*/) const {
-      Destroy(*left);
-    }
-
-    VType* left;
-    VType* right;
-  };
-
-  template <class VType>
-  static MoveAssignVisitor<VType> MakeMoveAssignVisitor(VType* left,
-                                                        VType* other) {
-    return {left, other};
-  }
-
-  // The implementation of the assignment operation for a variant.
-  template <class VType>
-  struct CopyAssignVisitor {
-    using DerivedType = typename VType::Variant;
-    template <std::size_t NewIndex>
-    void operator()(SizeT<NewIndex> /*new_i*/) const {
-      using New =
-          typename absl::variant_alternative<NewIndex, DerivedType>::type;
-
-      if (left->index_ == NewIndex) {
-        Access<NewIndex>(*left) = Access<NewIndex>(*right);
-      } else if (std::is_nothrow_copy_constructible<New>::value ||
-                 !std::is_nothrow_move_constructible<New>::value) {
-        Derived(*left).template emplace<NewIndex>(Access<NewIndex>(*right));
-      } else {
-        Derived(*left) = DerivedType(Derived(*right));
-      }
-    }
-
-    void operator()(SizeT<absl::variant_npos> /*new_i*/) const {
-      Destroy(*left);
-    }
-
-    VType* left;
-    const VType* right;
-  };
-
-  template <class VType>
-  static CopyAssignVisitor<VType> MakeCopyAssignVisitor(VType* left,
-                                                        const VType& other) {
-    return {left, &other};
-  }
-
-  // The implementation of conversion-assignment operations for variant.
-  template <class Left, class QualifiedNew>
-  struct ConversionAssignVisitor {
-    using NewIndex =
-        variant_internal::IndexOfConstructedType<Left, QualifiedNew>;
-
-    void operator()(SizeT<NewIndex::value> /*old_i*/
-                    ) const {
-      Access<NewIndex::value>(*left) = absl::forward<QualifiedNew>(other);
-    }
-
-    template <std::size_t OldIndex>
-    void operator()(SizeT<OldIndex> /*old_i*/
-                    ) const {
-      using New =
-          typename absl::variant_alternative<NewIndex::value, Left>::type;
-      if (std::is_nothrow_constructible<New, QualifiedNew>::value ||
-          !std::is_nothrow_move_constructible<New>::value) {
-        left->template emplace<NewIndex::value>(
-            absl::forward<QualifiedNew>(other));
-      } else {
-        // the standard says "equivalent to
-        // operator=(variant(std::forward<T>(t)))", but we use `emplace` here
-        // because the variant's move assignment operator could be deleted.
-        left->template emplace<NewIndex::value>(
-            New(absl::forward<QualifiedNew>(other)));
-      }
-    }
-
-    Left* left;
-    QualifiedNew&& other;
-  };
-
-  template <class Left, class QualifiedNew>
-  static ConversionAssignVisitor<Left, QualifiedNew>
-  MakeConversionAssignVisitor(Left* left, QualifiedNew&& qual) {
-    return {left, absl::forward<QualifiedNew>(qual)};
-  }
-
-  // Backend for operations for `emplace()` which destructs `*self` then
-  // construct a new alternative with `Args...`.
-  template <std::size_t NewIndex, class Self, class... Args>
-  static typename absl::variant_alternative<NewIndex, Self>::type& Replace(
-      Self* self, Args&&... args) {
-    Destroy(*self);
-    using New = typename absl::variant_alternative<NewIndex, Self>::type;
-    New* const result = ::new (static_cast<void*>(&self->state_))
-        New(absl::forward<Args>(args)...);
-    self->index_ = NewIndex;
-    return *result;
-  }
-
-  template <class LeftVariant, class QualifiedRightVariant>
-  struct InitFromVisitor {
-    template <std::size_t NewIndex>
-    void operator()(SizeT<NewIndex> /*new_i*/) const {
-      using Alternative =
-          typename variant_alternative<NewIndex, LeftVariant>::type;
-      ::new (static_cast<void*>(&left->state_)) Alternative(
-          Access<NewIndex>(std::forward<QualifiedRightVariant>(right)));
-    }
-
-    void operator()(SizeT<absl::variant_npos> /*new_i*/) const {
-      // This space intentionally left blank.
-    }
-    LeftVariant* left;
-    QualifiedRightVariant&& right;
-  };
-};
-
-template <class Expected, class... T>
-struct IndexOfImpl;
-
-template <class Expected>
-struct IndexOfImpl<Expected> {
-  using IndexFromEnd = SizeT<0>;
-  using MatchedIndexFromEnd = IndexFromEnd;
-  using MultipleMatches = std::false_type;
-};
-
-template <class Expected, class Head, class... Tail>
-struct IndexOfImpl<Expected, Head, Tail...> : IndexOfImpl<Expected, Tail...> {
-  using IndexFromEnd =
-      SizeT<IndexOfImpl<Expected, Tail...>::IndexFromEnd::value + 1>;
-};
-
-template <class Expected, class... Tail>
-struct IndexOfImpl<Expected, Expected, Tail...>
-    : IndexOfImpl<Expected, Tail...> {
-  using IndexFromEnd =
-      SizeT<IndexOfImpl<Expected, Tail...>::IndexFromEnd::value + 1>;
-  using MatchedIndexFromEnd = IndexFromEnd;
-  using MultipleMatches = std::integral_constant<
-      bool, IndexOfImpl<Expected, Tail...>::MatchedIndexFromEnd::value != 0>;
-};
-
-template <class Expected, class... Types>
-struct IndexOfMeta {
-  using Results = IndexOfImpl<Expected, Types...>;
-  static_assert(!Results::MultipleMatches::value,
-                "Attempted to access a variant by specifying a type that "
-                "matches more than one alternative.");
-  static_assert(Results::MatchedIndexFromEnd::value != 0,
-                "Attempted to access a variant by specifying a type that does "
-                "not match any alternative.");
-  using type = SizeT<sizeof...(Types) - Results::MatchedIndexFromEnd::value>;
-};
-
-template <class Expected, class... Types>
-using IndexOf = typename IndexOfMeta<Expected, Types...>::type;
-
-template <class Variant, class T, std::size_t CurrIndex>
-struct UnambiguousIndexOfImpl;
-
-// Terminating case encountered once we've checked all of the alternatives
-template <class T, std::size_t CurrIndex>
-struct UnambiguousIndexOfImpl<variant<>, T, CurrIndex> : SizeT<CurrIndex> {};
-
-// Case where T is not Head
-template <class Head, class... Tail, class T, std::size_t CurrIndex>
-struct UnambiguousIndexOfImpl<variant<Head, Tail...>, T, CurrIndex>
-    : UnambiguousIndexOfImpl<variant<Tail...>, T, CurrIndex + 1>::type {};
-
-// Case where T is Head
-template <class Head, class... Tail, std::size_t CurrIndex>
-struct UnambiguousIndexOfImpl<variant<Head, Tail...>, Head, CurrIndex>
-    : SizeT<UnambiguousIndexOfImpl<variant<Tail...>, Head, 0>::value ==
-                    sizeof...(Tail)
-                ? CurrIndex
-                : CurrIndex + sizeof...(Tail) + 1> {};
-
-template <class Variant, class T>
-struct UnambiguousIndexOf;
-
-struct NoMatch {
-  struct type {};
-};
-
-template <class... Alts, class T>
-struct UnambiguousIndexOf<variant<Alts...>, T>
-    : std::conditional<UnambiguousIndexOfImpl<variant<Alts...>, T, 0>::value !=
-                           sizeof...(Alts),
-                       UnambiguousIndexOfImpl<variant<Alts...>, T, 0>,
-                       NoMatch>::type::type {};
-
-template <class T, std::size_t /*Dummy*/>
-using UnambiguousTypeOfImpl = T;
-
-template <class Variant, class T>
-using UnambiguousTypeOfT =
-    UnambiguousTypeOfImpl<T, UnambiguousIndexOf<Variant, T>::value>;
-
-template <class H, class... T>
-class VariantStateBase;
-
-// This is an implementation of the "imaginary function" that is described in
-// [variant.ctor]
-// It is used in order to determine which alternative to construct during
-// initialization from some type T.
-template <class Variant, std::size_t I = 0>
-struct ImaginaryFun;
-
-template <std::size_t I>
-struct ImaginaryFun<variant<>, I> {
-  static void Run() = delete;
-};
-
-template <class H, class... T, std::size_t I>
-struct ImaginaryFun<variant<H, T...>, I> : ImaginaryFun<variant<T...>, I + 1> {
-  using ImaginaryFun<variant<T...>, I + 1>::Run;
-
-  // NOTE: const& and && are used instead of by-value due to lack of guaranteed
-  // move elision of C++17. This may have other minor differences, but tests
-  // pass.
-  static SizeT<I> Run(const H&, SizeT<I>);
-  static SizeT<I> Run(H&&, SizeT<I>);
-};
-
-// The following metafunctions are used in constructor and assignment
-// constraints.
-template <class Self, class T>
-struct IsNeitherSelfNorInPlace : std::true_type {};
-
-template <class Self>
-struct IsNeitherSelfNorInPlace<Self, Self> : std::false_type {};
-
-template <class Self, class T>
-struct IsNeitherSelfNorInPlace<Self, in_place_type_t<T>> : std::false_type {};
-
-template <class Self, std::size_t I>
-struct IsNeitherSelfNorInPlace<Self, in_place_index_t<I>> : std::false_type {};
-
-template <class Variant, class T, class = void>
-struct ConversionIsPossibleImpl : std::false_type {};
-
-template <class Variant, class T>
-struct ConversionIsPossibleImpl<
-    Variant, T,
-    void_t<decltype(ImaginaryFun<Variant>::Run(std::declval<T>(), {}))>>
-    : std::true_type {};
-
-template <class Variant, class T>
-struct ConversionIsPossible : ConversionIsPossibleImpl<Variant, T>::type {};
-
-template <class Variant, class T>
-struct IndexOfConstructedType<
-    Variant, T,
-    void_t<decltype(ImaginaryFun<Variant>::Run(std::declval<T>(), {}))>>
-    : decltype(ImaginaryFun<Variant>::Run(std::declval<T>(), {})) {};
-
-template <std::size_t... Is>
-struct ContainsVariantNPos
-    : absl::negation<std::is_same<  // NOLINT
-          absl::integer_sequence<bool, 0 <= Is...>,
-          absl::integer_sequence<bool, Is != absl::variant_npos...>>> {};
-
-template <class Op, class... QualifiedVariants>
-using RawVisitResult =
-    absl::result_of_t<Op(VariantAccessResult<0, QualifiedVariants>...)>;
-
-// NOTE: The spec requires that all return-paths yield the same type and is not
-// SFINAE-friendly, so we can deduce the return type by examining the first
-// result. If it's not callable, then we get an error, but are compliant and
-// fast to compile.
-// TODO(calabrese) Possibly rewrite in a way that yields better compile errors
-// at the cost of longer compile-times.
-template <class Op, class... QualifiedVariants>
-struct VisitResultImpl {
-  using type =
-      absl::result_of_t<Op(VariantAccessResult<0, QualifiedVariants>...)>;
-};
-
-// Done in two steps intentionally so that we don't cause substitution to fail.
-template <class Op, class... QualifiedVariants>
-using VisitResult = typename VisitResultImpl<Op, QualifiedVariants...>::type;
-
-template <class Op, class... QualifiedVariants>
-struct PerformVisitation {
-  using ReturnType = VisitResult<Op, QualifiedVariants...>;
-
-  template <std::size_t... Is>
-  constexpr ReturnType operator()(SizeT<Is>... indices) const {
-    return Run(typename ContainsVariantNPos<Is...>::type{},
-               absl::index_sequence_for<QualifiedVariants...>(), indices...);
-  }
-
-  template <std::size_t... TupIs, std::size_t... Is>
-  constexpr ReturnType Run(std::false_type /*has_valueless*/,
-                           index_sequence<TupIs...>, SizeT<Is>...) const {
-    static_assert(
-        std::is_same<ReturnType,
-                     absl::result_of_t<Op(VariantAccessResult<
-                                          Is, QualifiedVariants>...)>>::value,
-        "All visitation overloads must have the same return type.");
-    return absl::base_internal::invoke(
-        absl::forward<Op>(op),
-        VariantCoreAccess::Access<Is>(
-            absl::forward<QualifiedVariants>(std::get<TupIs>(variant_tup)))...);
-  }
-
-  template <std::size_t... TupIs, std::size_t... Is>
-  [[noreturn]] ReturnType Run(std::true_type /*has_valueless*/,
-                              index_sequence<TupIs...>, SizeT<Is>...) const {
-    absl::variant_internal::ThrowBadVariantAccess();
-  }
-
-  // TODO(calabrese) Avoid using a tuple, which causes lots of instantiations
-  // Attempts using lambda variadic captures fail on current GCC.
-  std::tuple<QualifiedVariants&&...> variant_tup;
-  Op&& op;
-};
-
-template <class... T>
-union Union;
-
-// We want to allow for variant<> to be trivial. For that, we need the default
-// constructor to be trivial, which means we can't define it ourselves.
-// Instead, we use a non-default constructor that takes NoopConstructorTag
-// that doesn't affect the triviality of the types.
-struct NoopConstructorTag {};
-
-template <std::size_t I>
-struct EmplaceTag {};
-
-template <>
-union Union<> {
-  constexpr explicit Union(NoopConstructorTag) noexcept {}
-};
-
-// Suppress bogus warning on MSVC: MSVC complains that Union<T...> has a defined
-// deleted destructor from the `std::is_destructible` check below.
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4624)
-#endif  // _MSC_VER
-
-template <class Head, class... Tail>
-union Union<Head, Tail...> {
-  using TailUnion = Union<Tail...>;
-
-  explicit constexpr Union(NoopConstructorTag /*tag*/) noexcept
-      : tail(NoopConstructorTag()) {}
-
-  template <class... P>
-  explicit constexpr Union(EmplaceTag<0>, P&&... args)
-      : head(absl::forward<P>(args)...) {}
-
-  template <std::size_t I, class... P>
-  explicit constexpr Union(EmplaceTag<I>, P&&... args)
-      : tail(EmplaceTag<I - 1>{}, absl::forward<P>(args)...) {}
-
-  Head head;
-  TailUnion tail;
-};
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif  // _MSC_VER
-
-// TODO(calabrese) Just contain a Union in this union (certain configs fail).
-template <class... T>
-union DestructibleUnionImpl;
-
-template <>
-union DestructibleUnionImpl<> {
-  constexpr explicit DestructibleUnionImpl(NoopConstructorTag) noexcept {}
-};
-
-template <class Head, class... Tail>
-union DestructibleUnionImpl<Head, Tail...> {
-  using TailUnion = DestructibleUnionImpl<Tail...>;
-
-  explicit constexpr DestructibleUnionImpl(NoopConstructorTag /*tag*/) noexcept
-      : tail(NoopConstructorTag()) {}
-
-  template <class... P>
-  explicit constexpr DestructibleUnionImpl(EmplaceTag<0>, P&&... args)
-      : head(absl::forward<P>(args)...) {}
-
-  template <std::size_t I, class... P>
-  explicit constexpr DestructibleUnionImpl(EmplaceTag<I>, P&&... args)
-      : tail(EmplaceTag<I - 1>{}, absl::forward<P>(args)...) {}
-
-  ~DestructibleUnionImpl() {}
-
-  Head head;
-  TailUnion tail;
-};
-
-// This union type is destructible even if one or more T are not trivially
-// destructible. In the case that all T are trivially destructible, then so is
-// this resultant type.
-template <class... T>
-using DestructibleUnion =
-    absl::conditional_t<std::is_destructible<Union<T...>>::value, Union<T...>,
-                        DestructibleUnionImpl<T...>>;
-
-// Deepest base, containing the actual union and the discriminator
-template <class H, class... T>
-class VariantStateBase {
- protected:
-  using Variant = variant<H, T...>;
-
-  template <class LazyH = H,
-            class ConstructibleH = absl::enable_if_t<
-                std::is_default_constructible<LazyH>::value, LazyH>>
-  constexpr VariantStateBase() noexcept(
-      std::is_nothrow_default_constructible<ConstructibleH>::value)
-      : state_(EmplaceTag<0>()), index_(0) {}
-
-  template <std::size_t I, class... P>
-  explicit constexpr VariantStateBase(EmplaceTag<I> tag, P&&... args)
-      : state_(tag, absl::forward<P>(args)...), index_(I) {}
-
-  explicit constexpr VariantStateBase(NoopConstructorTag)
-      : state_(NoopConstructorTag()), index_(variant_npos) {}
-
-  void destroy() {}  // Does nothing (shadowed in child if non-trivial)
-
-  DestructibleUnion<H, T...> state_;
-  std::size_t index_;
-};
-
-using absl::internal::identity;
-
-// OverloadSet::Overload() is a unary function which is overloaded to
-// take any of the element types of the variant, by reference-to-const.
-// The return type of the overload on T is identity<T>, so that you
-// can statically determine which overload was called.
-//
-// Overload() is not defined, so it can only be called in unevaluated
-// contexts.
-template <typename... Ts>
-struct OverloadSet;
-
-template <typename T, typename... Ts>
-struct OverloadSet<T, Ts...> : OverloadSet<Ts...> {
-  using Base = OverloadSet<Ts...>;
-  static identity<T> Overload(const T&);
-  using Base::Overload;
-};
-
-template <>
-struct OverloadSet<> {
-  // For any case not handled above.
-  static void Overload(...);
-};
-
-template <class T>
-using LessThanResult = decltype(std::declval<T>() < std::declval<T>());
-
-template <class T>
-using GreaterThanResult = decltype(std::declval<T>() > std::declval<T>());
-
-template <class T>
-using LessThanOrEqualResult = decltype(std::declval<T>() <= std::declval<T>());
-
-template <class T>
-using GreaterThanOrEqualResult =
-    decltype(std::declval<T>() >= std::declval<T>());
-
-template <class T>
-using EqualResult = decltype(std::declval<T>() == std::declval<T>());
-
-template <class T>
-using NotEqualResult = decltype(std::declval<T>() != std::declval<T>());
-
-using type_traits_internal::is_detected_convertible;
-
-template <class... T>
-using RequireAllHaveEqualT = absl::enable_if_t<
-    absl::conjunction<is_detected_convertible<bool, EqualResult, T>...>::value,
-    bool>;
-
-template <class... T>
-using RequireAllHaveNotEqualT =
-    absl::enable_if_t<absl::conjunction<is_detected_convertible<
-                          bool, NotEqualResult, T>...>::value,
-                      bool>;
-
-template <class... T>
-using RequireAllHaveLessThanT =
-    absl::enable_if_t<absl::conjunction<is_detected_convertible<
-                          bool, LessThanResult, T>...>::value,
-                      bool>;
-
-template <class... T>
-using RequireAllHaveLessThanOrEqualT =
-    absl::enable_if_t<absl::conjunction<is_detected_convertible<
-                          bool, LessThanOrEqualResult, T>...>::value,
-                      bool>;
-
-template <class... T>
-using RequireAllHaveGreaterThanOrEqualT =
-    absl::enable_if_t<absl::conjunction<is_detected_convertible<
-                          bool, GreaterThanOrEqualResult, T>...>::value,
-                      bool>;
-
-template <class... T>
-using RequireAllHaveGreaterThanT =
-    absl::enable_if_t<absl::conjunction<is_detected_convertible<
-                          bool, GreaterThanResult, T>...>::value,
-                      bool>;
-
-// Helper template containing implementations details of variant that can't go
-// in the private section. For convenience, this takes the variant type as a
-// single template parameter.
-template <typename T>
-struct VariantHelper;
-
-template <typename... Ts>
-struct VariantHelper<variant<Ts...>> {
-  // Type metafunction which returns the element type selected if
-  // OverloadSet::Overload() is well-formed when called with argument type U.
-  template <typename U>
-  using BestMatch = decltype(
-      variant_internal::OverloadSet<Ts...>::Overload(std::declval<U>()));
-
-  // Type metafunction which returns true if OverloadSet::Overload() is
-  // well-formed when called with argument type U.
-  // CanAccept can't be just an alias because there is a MSVC bug on parameter
-  // pack expansion involving decltype.
-  template <typename U>
-  struct CanAccept :
-      std::integral_constant<bool, !std::is_void<BestMatch<U>>::value> {};
-
-  // Type metafunction which returns true if Other is an instantiation of
-  // variant, and variants's converting constructor from Other will be
-  // well-formed. We will use this to remove constructors that would be
-  // ill-formed from the overload set.
-  template <typename Other>
-  struct CanConvertFrom;
-
-  template <typename... Us>
-  struct CanConvertFrom<variant<Us...>>
-      : public absl::conjunction<CanAccept<Us>...> {};
-};
-
-// A type with nontrivial copy ctor and trivial move ctor.
-struct TrivialMoveOnly {
-  TrivialMoveOnly(TrivialMoveOnly&&) = default;
-};
-
-// Trait class to detect whether a type is trivially move constructible.
-// A union's defaulted copy/move constructor is deleted if any variant member's
-// copy/move constructor is nontrivial.
-template <typename T>
-struct IsTriviallyMoveConstructible:
-  std::is_move_constructible<Union<T, TrivialMoveOnly>> {};
-
-// To guarantee triviality of all special-member functions that can be trivial,
-// we use a chain of conditional bases for each one.
-// The order of inheritance of bases from child to base are logically:
-//
-// variant
-// VariantCopyAssignBase
-// VariantMoveAssignBase
-// VariantCopyBase
-// VariantMoveBase
-// VariantStateBaseDestructor
-// VariantStateBase
-//
-// Note that there is a separate branch at each base that is dependent on
-// whether or not that corresponding special-member-function can be trivial in
-// the resultant variant type.
-
-template <class... T>
-class VariantStateBaseDestructorNontrivial;
-
-template <class... T>
-class VariantMoveBaseNontrivial;
-
-template <class... T>
-class VariantCopyBaseNontrivial;
-
-template <class... T>
-class VariantMoveAssignBaseNontrivial;
-
-template <class... T>
-class VariantCopyAssignBaseNontrivial;
-
-// Base that is dependent on whether or not the destructor can be trivial.
-template <class... T>
-using VariantStateBaseDestructor =
-    absl::conditional_t<std::is_destructible<Union<T...>>::value,
-                        VariantStateBase<T...>,
-                        VariantStateBaseDestructorNontrivial<T...>>;
-
-// Base that is dependent on whether or not the move-constructor can be
-// implicitly generated by the compiler (trivial or deleted).
-// Previously we were using `std::is_move_constructible<Union<T...>>` to check
-// whether all Ts have trivial move constructor, but it ran into a GCC bug:
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84866
-// So we have to use a different approach (i.e. `HasTrivialMoveConstructor`) to
-// work around the bug.
-template <class... T>
-using VariantMoveBase = absl::conditional_t<
-    absl::disjunction<
-        absl::negation<absl::conjunction<std::is_move_constructible<T>...>>,
-        absl::conjunction<IsTriviallyMoveConstructible<T>...>>::value,
-    VariantStateBaseDestructor<T...>, VariantMoveBaseNontrivial<T...>>;
-
-// Base that is dependent on whether or not the copy-constructor can be trivial.
-template <class... T>
-using VariantCopyBase = absl::conditional_t<
-    absl::disjunction<
-        absl::negation<absl::conjunction<std::is_copy_constructible<T>...>>,
-        std::is_copy_constructible<Union<T...>>>::value,
-    VariantMoveBase<T...>, VariantCopyBaseNontrivial<T...>>;
-
-// Base that is dependent on whether or not the move-assign can be trivial.
-template <class... T>
-using VariantMoveAssignBase = absl::conditional_t<
-    absl::disjunction<
-        absl::conjunction<absl::is_move_assignable<Union<T...>>,
-                          std::is_move_constructible<Union<T...>>,
-                          std::is_destructible<Union<T...>>>,
-        absl::negation<absl::conjunction<std::is_move_constructible<T>...,
-                                         // Note: We're not qualifying this with
-                                         // absl:: because it doesn't compile
-                                         // under MSVC.
-                                         is_move_assignable<T>...>>>::value,
-    VariantCopyBase<T...>, VariantMoveAssignBaseNontrivial<T...>>;
-
-// Base that is dependent on whether or not the copy-assign can be trivial.
-template <class... T>
-using VariantCopyAssignBase = absl::conditional_t<
-    absl::disjunction<
-        absl::conjunction<absl::is_copy_assignable<Union<T...>>,
-                          std::is_copy_constructible<Union<T...>>,
-                          std::is_destructible<Union<T...>>>,
-        absl::negation<absl::conjunction<std::is_copy_constructible<T>...,
-                                         // Note: We're not qualifying this with
-                                         // absl:: because it doesn't compile
-                                         // under MSVC.
-                                         is_copy_assignable<T>...>>>::value,
-    VariantMoveAssignBase<T...>, VariantCopyAssignBaseNontrivial<T...>>;
-
-template <class... T>
-using VariantBase = VariantCopyAssignBase<T...>;
-
-template <class... T>
-class VariantStateBaseDestructorNontrivial : protected VariantStateBase<T...> {
- private:
-  using Base = VariantStateBase<T...>;
-
- protected:
-  using Base::Base;
-
-  VariantStateBaseDestructorNontrivial() = default;
-  VariantStateBaseDestructorNontrivial(VariantStateBaseDestructorNontrivial&&) =
-      default;
-  VariantStateBaseDestructorNontrivial(
-      const VariantStateBaseDestructorNontrivial&) = default;
-  VariantStateBaseDestructorNontrivial& operator=(
-      VariantStateBaseDestructorNontrivial&&) = default;
-  VariantStateBaseDestructorNontrivial& operator=(
-      const VariantStateBaseDestructorNontrivial&) = default;
-
-  struct Destroyer {
-    template <std::size_t I>
-    void operator()(SizeT<I> i) const {
-      using Alternative =
-          typename absl::variant_alternative<I, variant<T...>>::type;
-      variant_internal::AccessUnion(self->state_, i).~Alternative();
-    }
-
-    void operator()(SizeT<absl::variant_npos> /*i*/) const {
-      // This space intentionally left blank
-    }
-
-    VariantStateBaseDestructorNontrivial* self;
-  };
-
-  void destroy() { VisitIndices<sizeof...(T)>::Run(Destroyer{this}, index_); }
-
-  ~VariantStateBaseDestructorNontrivial() { destroy(); }
-
- protected:
-  using Base::index_;
-  using Base::state_;
-};
-
-template <class... T>
-class VariantMoveBaseNontrivial : protected VariantStateBaseDestructor<T...> {
- private:
-  using Base = VariantStateBaseDestructor<T...>;
-
- protected:
-  using Base::Base;
-
-  struct Construct {
-    template <std::size_t I>
-    void operator()(SizeT<I> i) const {
-      using Alternative =
-          typename absl::variant_alternative<I, variant<T...>>::type;
-      ::new (static_cast<void*>(&self->state_)) Alternative(
-          variant_internal::AccessUnion(absl::move(other->state_), i));
-    }
-
-    void operator()(SizeT<absl::variant_npos> /*i*/) const {}
-
-    VariantMoveBaseNontrivial* self;
-    VariantMoveBaseNontrivial* other;
-  };
-
-  VariantMoveBaseNontrivial() = default;
-  VariantMoveBaseNontrivial(VariantMoveBaseNontrivial&& other) noexcept(
-      absl::conjunction<std::is_nothrow_move_constructible<T>...>::value)
-      : Base(NoopConstructorTag()) {
-    VisitIndices<sizeof...(T)>::Run(Construct{this, &other}, other.index_);
-    index_ = other.index_;
-  }
-
-  VariantMoveBaseNontrivial(VariantMoveBaseNontrivial const&) = default;
-
-  VariantMoveBaseNontrivial& operator=(VariantMoveBaseNontrivial&&) = default;
-  VariantMoveBaseNontrivial& operator=(VariantMoveBaseNontrivial const&) =
-      default;
-
- protected:
-  using Base::index_;
-  using Base::state_;
-};
-
-template <class... T>
-class VariantCopyBaseNontrivial : protected VariantMoveBase<T...> {
- private:
-  using Base = VariantMoveBase<T...>;
-
- protected:
-  using Base::Base;
-
-  VariantCopyBaseNontrivial() = default;
-  VariantCopyBaseNontrivial(VariantCopyBaseNontrivial&&) = default;
-
-  struct Construct {
-    template <std::size_t I>
-    void operator()(SizeT<I> i) const {
-      using Alternative =
-          typename absl::variant_alternative<I, variant<T...>>::type;
-      ::new (static_cast<void*>(&self->state_))
-          Alternative(variant_internal::AccessUnion(other->state_, i));
-    }
-
-    void operator()(SizeT<absl::variant_npos> /*i*/) const {}
-
-    VariantCopyBaseNontrivial* self;
-    const VariantCopyBaseNontrivial* other;
-  };
-
-  VariantCopyBaseNontrivial(VariantCopyBaseNontrivial const& other)
-      : Base(NoopConstructorTag()) {
-    VisitIndices<sizeof...(T)>::Run(Construct{this, &other}, other.index_);
-    index_ = other.index_;
-  }
-
-  VariantCopyBaseNontrivial& operator=(VariantCopyBaseNontrivial&&) = default;
-  VariantCopyBaseNontrivial& operator=(VariantCopyBaseNontrivial const&) =
-      default;
-
- protected:
-  using Base::index_;
-  using Base::state_;
-};
-
-template <class... T>
-class VariantMoveAssignBaseNontrivial : protected VariantCopyBase<T...> {
-  friend struct VariantCoreAccess;
-
- private:
-  using Base = VariantCopyBase<T...>;
-
- protected:
-  using Base::Base;
-
-  VariantMoveAssignBaseNontrivial() = default;
-  VariantMoveAssignBaseNontrivial(VariantMoveAssignBaseNontrivial&&) = default;
-  VariantMoveAssignBaseNontrivial(const VariantMoveAssignBaseNontrivial&) =
-      default;
-  VariantMoveAssignBaseNontrivial& operator=(
-      VariantMoveAssignBaseNontrivial const&) = default;
-
-    VariantMoveAssignBaseNontrivial&
-    operator=(VariantMoveAssignBaseNontrivial&& other) noexcept(
-        absl::conjunction<std::is_nothrow_move_constructible<T>...,
-                          std::is_nothrow_move_assignable<T>...>::value) {
-      VisitIndices<sizeof...(T)>::Run(
-          VariantCoreAccess::MakeMoveAssignVisitor(this, &other), other.index_);
-      return *this;
-    }
-
- protected:
-  using Base::index_;
-  using Base::state_;
-};
-
-template <class... T>
-class VariantCopyAssignBaseNontrivial : protected VariantMoveAssignBase<T...> {
-  friend struct VariantCoreAccess;
-
- private:
-  using Base = VariantMoveAssignBase<T...>;
-
- protected:
-  using Base::Base;
-
-  VariantCopyAssignBaseNontrivial() = default;
-  VariantCopyAssignBaseNontrivial(VariantCopyAssignBaseNontrivial&&) = default;
-  VariantCopyAssignBaseNontrivial(const VariantCopyAssignBaseNontrivial&) =
-      default;
-  VariantCopyAssignBaseNontrivial& operator=(
-      VariantCopyAssignBaseNontrivial&&) = default;
-
-    VariantCopyAssignBaseNontrivial& operator=(
-        const VariantCopyAssignBaseNontrivial& other) {
-      VisitIndices<sizeof...(T)>::Run(
-          VariantCoreAccess::MakeCopyAssignVisitor(this, other), other.index_);
-      return *this;
-    }
-
- protected:
-  using Base::index_;
-  using Base::state_;
-};
-
-////////////////////////////////////////
-// Visitors for Comparison Operations //
-////////////////////////////////////////
-
-template <class... Types>
-struct EqualsOp {
-  const variant<Types...>* v;
-  const variant<Types...>* w;
-
-  constexpr bool operator()(SizeT<absl::variant_npos> /*v_i*/) const {
-    return true;
-  }
-
-  template <std::size_t I>
-  constexpr bool operator()(SizeT<I> /*v_i*/) const {
-    return VariantCoreAccess::Access<I>(*v) == VariantCoreAccess::Access<I>(*w);
-  }
-};
-
-template <class... Types>
-struct NotEqualsOp {
-  const variant<Types...>* v;
-  const variant<Types...>* w;
-
-  constexpr bool operator()(SizeT<absl::variant_npos> /*v_i*/) const {
-    return false;
-  }
-
-  template <std::size_t I>
-  constexpr bool operator()(SizeT<I> /*v_i*/) const {
-    return VariantCoreAccess::Access<I>(*v) != VariantCoreAccess::Access<I>(*w);
-  }
-};
-
-template <class... Types>
-struct LessThanOp {
-  const variant<Types...>* v;
-  const variant<Types...>* w;
-
-  constexpr bool operator()(SizeT<absl::variant_npos> /*v_i*/) const {
-    return false;
-  }
-
-  template <std::size_t I>
-  constexpr bool operator()(SizeT<I> /*v_i*/) const {
-    return VariantCoreAccess::Access<I>(*v) < VariantCoreAccess::Access<I>(*w);
-  }
-};
-
-template <class... Types>
-struct GreaterThanOp {
-  const variant<Types...>* v;
-  const variant<Types...>* w;
-
-  constexpr bool operator()(SizeT<absl::variant_npos> /*v_i*/) const {
-    return false;
-  }
-
-  template <std::size_t I>
-  constexpr bool operator()(SizeT<I> /*v_i*/) const {
-    return VariantCoreAccess::Access<I>(*v) > VariantCoreAccess::Access<I>(*w);
-  }
-};
-
-template <class... Types>
-struct LessThanOrEqualsOp {
-  const variant<Types...>* v;
-  const variant<Types...>* w;
-
-  constexpr bool operator()(SizeT<absl::variant_npos> /*v_i*/) const {
-    return true;
-  }
-
-  template <std::size_t I>
-  constexpr bool operator()(SizeT<I> /*v_i*/) const {
-    return VariantCoreAccess::Access<I>(*v) <= VariantCoreAccess::Access<I>(*w);
-  }
-};
-
-template <class... Types>
-struct GreaterThanOrEqualsOp {
-  const variant<Types...>* v;
-  const variant<Types...>* w;
-
-  constexpr bool operator()(SizeT<absl::variant_npos> /*v_i*/) const {
-    return true;
-  }
-
-  template <std::size_t I>
-  constexpr bool operator()(SizeT<I> /*v_i*/) const {
-    return VariantCoreAccess::Access<I>(*v) >= VariantCoreAccess::Access<I>(*w);
-  }
-};
-
-// Precondition: v.index() == w.index();
-template <class... Types>
-struct SwapSameIndex {
-  variant<Types...>* v;
-  variant<Types...>* w;
-  template <std::size_t I>
-  void operator()(SizeT<I>) const {
-    type_traits_internal::Swap(VariantCoreAccess::Access<I>(*v),
-                               VariantCoreAccess::Access<I>(*w));
-  }
-
-  void operator()(SizeT<variant_npos>) const {}
-};
-
-// TODO(calabrese) do this from a different namespace for proper adl usage
-template <class... Types>
-struct Swap {
-  variant<Types...>* v;
-  variant<Types...>* w;
-
-  void generic_swap() const {
-    variant<Types...> tmp(std::move(*w));
-    VariantCoreAccess::Destroy(*w);
-    VariantCoreAccess::InitFrom(*w, std::move(*v));
-    VariantCoreAccess::Destroy(*v);
-    VariantCoreAccess::InitFrom(*v, std::move(tmp));
-  }
-
-  void operator()(SizeT<absl::variant_npos> /*w_i*/) const {
-    if (!v->valueless_by_exception()) {
-      generic_swap();
-    }
-  }
-
-  template <std::size_t Wi>
-  void operator()(SizeT<Wi> /*w_i*/) {
-    if (v->index() == Wi) {
-      VisitIndices<sizeof...(Types)>::Run(SwapSameIndex<Types...>{v, w}, Wi);
-    } else {
-      generic_swap();
-    }
-  }
-};
-
-template <typename Variant, typename = void, typename... Ts>
-struct VariantHashBase {
-  VariantHashBase() = delete;
-  VariantHashBase(const VariantHashBase&) = delete;
-  VariantHashBase(VariantHashBase&&) = delete;
-  VariantHashBase& operator=(const VariantHashBase&) = delete;
-  VariantHashBase& operator=(VariantHashBase&&) = delete;
-};
-
-struct VariantHashVisitor {
-  template <typename T>
-  size_t operator()(const T& t) {
-    return std::hash<T>{}(t);
-  }
-};
-
-template <typename Variant, typename... Ts>
-struct VariantHashBase<Variant,
-                       absl::enable_if_t<absl::conjunction<
-                           type_traits_internal::IsHashable<Ts>...>::value>,
-                       Ts...> {
-  using argument_type = Variant;
-  using result_type = size_t;
-  size_t operator()(const Variant& var) const {
-    type_traits_internal::AssertHashEnabled<Ts...>();
-    if (var.valueless_by_exception()) {
-      return 239799884;
-    }
-    size_t result = VisitIndices<variant_size<Variant>::value>::Run(
-        PerformVisitation<VariantHashVisitor, const Variant&>{
-            std::forward_as_tuple(var), VariantHashVisitor{}},
-        var.index());
-    // Combine the index and the hash result in order to distinguish
-    // std::variant<int, int> holding the same value as different alternative.
-    return result ^ var.index();
-  }
-};
-
-}  // namespace variant_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // !defined(ABSL_USES_STD_VARIANT)
-#endif  // ABSL_TYPES_variant_internal_H_
diff --git a/third_party/abseil/absl/types/optional.h b/third_party/abseil/absl/types/optional.h
deleted file mode 100644
index 61540cf..0000000
--- a/third_party/abseil/absl/types/optional.h
+++ /dev/null
@@ -1,776 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// optional.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines the `absl::optional` type for holding a value which
-// may or may not be present. This type is useful for providing value semantics
-// for operations that may either wish to return or hold "something-or-nothing".
-//
-// Example:
-//
-//   // A common way to signal operation failure is to provide an output
-//   // parameter and a bool return type:
-//   bool AcquireResource(const Input&, Resource * out);
-//
-//   // Providing an absl::optional return type provides a cleaner API:
-//   absl::optional<Resource> AcquireResource(const Input&);
-//
-// `absl::optional` is a C++11 compatible version of the C++17 `std::optional`
-// abstraction and is designed to be a drop-in replacement for code compliant
-// with C++17.
-#ifndef ABSL_TYPES_OPTIONAL_H_
-#define ABSL_TYPES_OPTIONAL_H_
-
-#include "absl/base/config.h"   // TODO(calabrese) IWYU removal?
-#include "absl/utility/utility.h"
-
-#ifdef ABSL_USES_STD_OPTIONAL
-
-#include <optional>  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using std::bad_optional_access;
-using std::optional;
-using std::make_optional;
-using std::nullopt_t;
-using std::nullopt;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_OPTIONAL
-
-#include <cassert>
-#include <functional>
-#include <initializer_list>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/attributes.h"
-#include "absl/base/internal/inline_variable.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/bad_optional_access.h"
-#include "absl/types/internal/optional.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// nullopt_t
-//
-// Class type for `absl::nullopt` used to indicate an `absl::optional<T>` type
-// that does not contain a value.
-struct nullopt_t {
-  // It must not be default-constructible to avoid ambiguity for opt = {}.
-  explicit constexpr nullopt_t(optional_internal::init_t) noexcept {}
-};
-
-// nullopt
-//
-// A tag constant of type `absl::nullopt_t` used to indicate an empty
-// `absl::optional` in certain functions, such as construction or assignment.
-ABSL_INTERNAL_INLINE_CONSTEXPR(nullopt_t, nullopt,
-                               nullopt_t(optional_internal::init_t()));
-
-// -----------------------------------------------------------------------------
-// absl::optional
-// -----------------------------------------------------------------------------
-//
-// A value of type `absl::optional<T>` holds either a value of `T` or an
-// "empty" value.  When it holds a value of `T`, it stores it as a direct
-// sub-object, so `sizeof(optional<T>)` is approximately
-// `sizeof(T) + sizeof(bool)`.
-//
-// This implementation is based on the specification in the latest draft of the
-// C++17 `std::optional` specification as of May 2017, section 20.6.
-//
-// Differences between `absl::optional<T>` and `std::optional<T>` include:
-//
-//    * `constexpr` is not used for non-const member functions.
-//      (dependency on some differences between C++11 and C++14.)
-//    * `absl::nullopt` and `absl::in_place` are not declared `constexpr`. We
-//      need the inline variable support in C++17 for external linkage.
-//    * Throws `absl::bad_optional_access` instead of
-//      `std::bad_optional_access`.
-//    * `make_optional()` cannot be declared `constexpr` due to the absence of
-//      guaranteed copy elision.
-//    * The move constructor's `noexcept` specification is stronger, i.e. if the
-//      default allocator is non-throwing (via setting
-//      `ABSL_ALLOCATOR_NOTHROW`), it evaluates to `noexcept(true)`, because
-//      we assume
-//       a) move constructors should only throw due to allocation failure and
-//       b) if T's move constructor allocates, it uses the same allocation
-//          function as the default allocator.
-//
-template <typename T>
-class optional : private optional_internal::optional_data<T>,
-                 private optional_internal::optional_ctor_base<
-                     optional_internal::ctor_copy_traits<T>::traits>,
-                 private optional_internal::optional_assign_base<
-                     optional_internal::assign_copy_traits<T>::traits> {
-  using data_base = optional_internal::optional_data<T>;
-
- public:
-  typedef T value_type;
-
-  // Constructors
-
-  // Constructs an `optional` holding an empty value, NOT a default constructed
-  // `T`.
-  constexpr optional() noexcept {}
-
-  // Constructs an `optional` initialized with `nullopt` to hold an empty value.
-  constexpr optional(nullopt_t) noexcept {}  // NOLINT(runtime/explicit)
-
-  // Copy constructor, standard semantics
-  optional(const optional&) = default;
-
-  // Move constructor, standard semantics
-  optional(optional&&) = default;
-
-  // Constructs a non-empty `optional` direct-initialized value of type `T` from
-  // the arguments `std::forward<Args>(args)...`  within the `optional`.
-  // (The `in_place_t` is a tag used to indicate that the contained object
-  // should be constructed in-place.)
-  template <typename InPlaceT, typename... Args,
-            absl::enable_if_t<absl::conjunction<
-                std::is_same<InPlaceT, in_place_t>,
-                std::is_constructible<T, Args&&...> >::value>* = nullptr>
-  constexpr explicit optional(InPlaceT, Args&&... args)
-      : data_base(in_place_t(), absl::forward<Args>(args)...) {}
-
-  // Constructs a non-empty `optional` direct-initialized value of type `T` from
-  // the arguments of an initializer_list and `std::forward<Args>(args)...`.
-  // (The `in_place_t` is a tag used to indicate that the contained object
-  // should be constructed in-place.)
-  template <typename U, typename... Args,
-            typename = typename std::enable_if<std::is_constructible<
-                T, std::initializer_list<U>&, Args&&...>::value>::type>
-  constexpr explicit optional(in_place_t, std::initializer_list<U> il,
-                              Args&&... args)
-      : data_base(in_place_t(), il, absl::forward<Args>(args)...) {
-  }
-
-  // Value constructor (implicit)
-  template <
-      typename U = T,
-      typename std::enable_if<
-          absl::conjunction<absl::negation<std::is_same<
-                                in_place_t, typename std::decay<U>::type> >,
-                            absl::negation<std::is_same<
-                                optional<T>, typename std::decay<U>::type> >,
-                            std::is_convertible<U&&, T>,
-                            std::is_constructible<T, U&&> >::value,
-          bool>::type = false>
-  constexpr optional(U&& v) : data_base(in_place_t(), absl::forward<U>(v)) {}
-
-  // Value constructor (explicit)
-  template <
-      typename U = T,
-      typename std::enable_if<
-          absl::conjunction<absl::negation<std::is_same<
-                                in_place_t, typename std::decay<U>::type>>,
-                            absl::negation<std::is_same<
-                                optional<T>, typename std::decay<U>::type>>,
-                            absl::negation<std::is_convertible<U&&, T>>,
-                            std::is_constructible<T, U&&>>::value,
-          bool>::type = false>
-  explicit constexpr optional(U&& v)
-      : data_base(in_place_t(), absl::forward<U>(v)) {}
-
-  // Converting copy constructor (implicit)
-  template <typename U,
-            typename std::enable_if<
-                absl::conjunction<
-                    absl::negation<std::is_same<T, U> >,
-                    std::is_constructible<T, const U&>,
-                    absl::negation<
-                        optional_internal::
-                            is_constructible_convertible_from_optional<T, U> >,
-                    std::is_convertible<const U&, T> >::value,
-                bool>::type = false>
-  optional(const optional<U>& rhs) {
-    if (rhs) {
-      this->construct(*rhs);
-    }
-  }
-
-  // Converting copy constructor (explicit)
-  template <typename U,
-            typename std::enable_if<
-                absl::conjunction<
-                    absl::negation<std::is_same<T, U>>,
-                    std::is_constructible<T, const U&>,
-                    absl::negation<
-                        optional_internal::
-                            is_constructible_convertible_from_optional<T, U>>,
-                    absl::negation<std::is_convertible<const U&, T>>>::value,
-                bool>::type = false>
-  explicit optional(const optional<U>& rhs) {
-    if (rhs) {
-      this->construct(*rhs);
-    }
-  }
-
-  // Converting move constructor (implicit)
-  template <typename U,
-            typename std::enable_if<
-                absl::conjunction<
-                    absl::negation<std::is_same<T, U> >,
-                    std::is_constructible<T, U&&>,
-                    absl::negation<
-                        optional_internal::
-                            is_constructible_convertible_from_optional<T, U> >,
-                    std::is_convertible<U&&, T> >::value,
-                bool>::type = false>
-  optional(optional<U>&& rhs) {
-    if (rhs) {
-      this->construct(std::move(*rhs));
-    }
-  }
-
-  // Converting move constructor (explicit)
-  template <
-      typename U,
-      typename std::enable_if<
-          absl::conjunction<
-              absl::negation<std::is_same<T, U>>, std::is_constructible<T, U&&>,
-              absl::negation<
-                  optional_internal::is_constructible_convertible_from_optional<
-                      T, U>>,
-              absl::negation<std::is_convertible<U&&, T>>>::value,
-          bool>::type = false>
-  explicit optional(optional<U>&& rhs) {
-    if (rhs) {
-      this->construct(std::move(*rhs));
-    }
-  }
-
-  // Destructor. Trivial if `T` is trivially destructible.
-  ~optional() = default;
-
-  // Assignment Operators
-
-  // Assignment from `nullopt`
-  //
-  // Example:
-  //
-  //   struct S { int value; };
-  //   optional<S> opt = absl::nullopt;  // Could also use opt = { };
-  optional& operator=(nullopt_t) noexcept {
-    this->destruct();
-    return *this;
-  }
-
-  // Copy assignment operator, standard semantics
-  optional& operator=(const optional& src) = default;
-
-  // Move assignment operator, standard semantics
-  optional& operator=(optional&& src) = default;
-
-  // Value assignment operators
-  template <
-      typename U = T,
-      typename = typename std::enable_if<absl::conjunction<
-          absl::negation<
-              std::is_same<optional<T>, typename std::decay<U>::type>>,
-          absl::negation<
-              absl::conjunction<std::is_scalar<T>,
-                                std::is_same<T, typename std::decay<U>::type>>>,
-          std::is_constructible<T, U>, std::is_assignable<T&, U>>::value>::type>
-  optional& operator=(U&& v) {
-    this->assign(std::forward<U>(v));
-    return *this;
-  }
-
-  template <
-      typename U,
-      typename = typename std::enable_if<absl::conjunction<
-          absl::negation<std::is_same<T, U>>,
-          std::is_constructible<T, const U&>, std::is_assignable<T&, const U&>,
-          absl::negation<
-              optional_internal::
-                  is_constructible_convertible_assignable_from_optional<
-                      T, U>>>::value>::type>
-  optional& operator=(const optional<U>& rhs) {
-    if (rhs) {
-      this->assign(*rhs);
-    } else {
-      this->destruct();
-    }
-    return *this;
-  }
-
-  template <typename U,
-            typename = typename std::enable_if<absl::conjunction<
-                absl::negation<std::is_same<T, U>>, std::is_constructible<T, U>,
-                std::is_assignable<T&, U>,
-                absl::negation<
-                    optional_internal::
-                        is_constructible_convertible_assignable_from_optional<
-                            T, U>>>::value>::type>
-  optional& operator=(optional<U>&& rhs) {
-    if (rhs) {
-      this->assign(std::move(*rhs));
-    } else {
-      this->destruct();
-    }
-    return *this;
-  }
-
-  // Modifiers
-
-  // optional::reset()
-  //
-  // Destroys the inner `T` value of an `absl::optional` if one is present.
-  ABSL_ATTRIBUTE_REINITIALIZES void reset() noexcept { this->destruct(); }
-
-  // optional::emplace()
-  //
-  // (Re)constructs the underlying `T` in-place with the given forwarded
-  // arguments.
-  //
-  // Example:
-  //
-  //   optional<Foo> opt;
-  //   opt.emplace(arg1,arg2,arg3);  // Constructs Foo(arg1,arg2,arg3)
-  //
-  // If the optional is non-empty, and the `args` refer to subobjects of the
-  // current object, then behaviour is undefined, because the current object
-  // will be destructed before the new object is constructed with `args`.
-  template <typename... Args,
-            typename = typename std::enable_if<
-                std::is_constructible<T, Args&&...>::value>::type>
-  T& emplace(Args&&... args) {
-    this->destruct();
-    this->construct(std::forward<Args>(args)...);
-    return reference();
-  }
-
-  // Emplace reconstruction overload for an initializer list and the given
-  // forwarded arguments.
-  //
-  // Example:
-  //
-  //   struct Foo {
-  //     Foo(std::initializer_list<int>);
-  //   };
-  //
-  //   optional<Foo> opt;
-  //   opt.emplace({1,2,3});  // Constructs Foo({1,2,3})
-  template <typename U, typename... Args,
-            typename = typename std::enable_if<std::is_constructible<
-                T, std::initializer_list<U>&, Args&&...>::value>::type>
-  T& emplace(std::initializer_list<U> il, Args&&... args) {
-    this->destruct();
-    this->construct(il, std::forward<Args>(args)...);
-    return reference();
-  }
-
-  // Swaps
-
-  // Swap, standard semantics
-  void swap(optional& rhs) noexcept(
-      std::is_nothrow_move_constructible<T>::value&&
-          type_traits_internal::IsNothrowSwappable<T>::value) {
-    if (*this) {
-      if (rhs) {
-        type_traits_internal::Swap(**this, *rhs);
-      } else {
-        rhs.construct(std::move(**this));
-        this->destruct();
-      }
-    } else {
-      if (rhs) {
-        this->construct(std::move(*rhs));
-        rhs.destruct();
-      } else {
-        // No effect (swap(disengaged, disengaged)).
-      }
-    }
-  }
-
-  // Observers
-
-  // optional::operator->()
-  //
-  // Accesses the underlying `T` value's member `m` of an `optional`. If the
-  // `optional` is empty, behavior is undefined.
-  //
-  // If you need myOpt->foo in constexpr, use (*myOpt).foo instead.
-  const T* operator->() const {
-    ABSL_HARDENING_ASSERT(this->engaged_);
-    return std::addressof(this->data_);
-  }
-  T* operator->() {
-    ABSL_HARDENING_ASSERT(this->engaged_);
-    return std::addressof(this->data_);
-  }
-
-  // optional::operator*()
-  //
-  // Accesses the underlying `T` value of an `optional`. If the `optional` is
-  // empty, behavior is undefined.
-  constexpr const T& operator*() const& {
-    return ABSL_HARDENING_ASSERT(this->engaged_), reference();
-  }
-  T& operator*() & {
-    ABSL_HARDENING_ASSERT(this->engaged_);
-    return reference();
-  }
-  constexpr const T&& operator*() const && {
-    return ABSL_HARDENING_ASSERT(this->engaged_), absl::move(reference());
-  }
-  T&& operator*() && {
-    ABSL_HARDENING_ASSERT(this->engaged_);
-    return std::move(reference());
-  }
-
-  // optional::operator bool()
-  //
-  // Returns false if and only if the `optional` is empty.
-  //
-  //   if (opt) {
-  //     // do something with *opt or opt->;
-  //   } else {
-  //     // opt is empty.
-  //   }
-  //
-  constexpr explicit operator bool() const noexcept { return this->engaged_; }
-
-  // optional::has_value()
-  //
-  // Determines whether the `optional` contains a value. Returns `false` if and
-  // only if `*this` is empty.
-  constexpr bool has_value() const noexcept { return this->engaged_; }
-
-// Suppress bogus warning on MSVC: MSVC complains call to reference() after
-// throw_bad_optional_access() is unreachable.
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4702)
-#endif  // _MSC_VER
-  // optional::value()
-  //
-  // Returns a reference to an `optional`s underlying value. The constness
-  // and lvalue/rvalue-ness of the `optional` is preserved to the view of
-  // the `T` sub-object. Throws `absl::bad_optional_access` when the `optional`
-  // is empty.
-  constexpr const T& value() const & {
-    return static_cast<bool>(*this)
-               ? reference()
-               : (optional_internal::throw_bad_optional_access(), reference());
-  }
-  T& value() & {
-    return static_cast<bool>(*this)
-               ? reference()
-               : (optional_internal::throw_bad_optional_access(), reference());
-  }
-  T&& value() && {  // NOLINT(build/c++11)
-    return std::move(
-        static_cast<bool>(*this)
-            ? reference()
-            : (optional_internal::throw_bad_optional_access(), reference()));
-  }
-  constexpr const T&& value() const && {  // NOLINT(build/c++11)
-    return absl::move(
-        static_cast<bool>(*this)
-            ? reference()
-            : (optional_internal::throw_bad_optional_access(), reference()));
-  }
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif  // _MSC_VER
-
-  // optional::value_or()
-  //
-  // Returns either the value of `T` or a passed default `v` if the `optional`
-  // is empty.
-  template <typename U>
-  constexpr T value_or(U&& v) const& {
-    static_assert(std::is_copy_constructible<value_type>::value,
-                  "optional<T>::value_or: T must be copy constructible");
-    static_assert(std::is_convertible<U&&, value_type>::value,
-                  "optional<T>::value_or: U must be convertible to T");
-    return static_cast<bool>(*this)
-               ? **this
-               : static_cast<T>(absl::forward<U>(v));
-  }
-  template <typename U>
-  T value_or(U&& v) && {  // NOLINT(build/c++11)
-    static_assert(std::is_move_constructible<value_type>::value,
-                  "optional<T>::value_or: T must be move constructible");
-    static_assert(std::is_convertible<U&&, value_type>::value,
-                  "optional<T>::value_or: U must be convertible to T");
-    return static_cast<bool>(*this) ? std::move(**this)
-                                    : static_cast<T>(std::forward<U>(v));
-  }
-
- private:
-  // Private accessors for internal storage viewed as reference to T.
-  constexpr const T& reference() const { return this->data_; }
-  T& reference() { return this->data_; }
-
-  // T constraint checks.  You can't have an optional of nullopt_t, in_place_t
-  // or a reference.
-  static_assert(
-      !std::is_same<nullopt_t, typename std::remove_cv<T>::type>::value,
-      "optional<nullopt_t> is not allowed.");
-  static_assert(
-      !std::is_same<in_place_t, typename std::remove_cv<T>::type>::value,
-      "optional<in_place_t> is not allowed.");
-  static_assert(!std::is_reference<T>::value,
-                "optional<reference> is not allowed.");
-};
-
-// Non-member functions
-
-// swap()
-//
-// Performs a swap between two `absl::optional` objects, using standard
-// semantics.
-template <typename T, typename std::enable_if<
-                          std::is_move_constructible<T>::value &&
-                              type_traits_internal::IsSwappable<T>::value,
-                          bool>::type = false>
-void swap(optional<T>& a, optional<T>& b) noexcept(noexcept(a.swap(b))) {
-  a.swap(b);
-}
-
-// make_optional()
-//
-// Creates a non-empty `optional<T>` where the type of `T` is deduced. An
-// `absl::optional` can also be explicitly instantiated with
-// `make_optional<T>(v)`.
-//
-// Note: `make_optional()` constructions may be declared `constexpr` for
-// trivially copyable types `T`. Non-trivial types require copy elision
-// support in C++17 for `make_optional` to support `constexpr` on such
-// non-trivial types.
-//
-// Example:
-//
-//   constexpr absl::optional<int> opt = absl::make_optional(1);
-//   static_assert(opt.value() == 1, "");
-template <typename T>
-constexpr optional<typename std::decay<T>::type> make_optional(T&& v) {
-  return optional<typename std::decay<T>::type>(absl::forward<T>(v));
-}
-
-template <typename T, typename... Args>
-constexpr optional<T> make_optional(Args&&... args) {
-  return optional<T>(in_place_t(), absl::forward<Args>(args)...);
-}
-
-template <typename T, typename U, typename... Args>
-constexpr optional<T> make_optional(std::initializer_list<U> il,
-                                    Args&&... args) {
-  return optional<T>(in_place_t(), il,
-                     absl::forward<Args>(args)...);
-}
-
-// Relational operators [optional.relops]
-
-// Empty optionals are considered equal to each other and less than non-empty
-// optionals. Supports relations between optional<T> and optional<U>, between
-// optional<T> and U, and between optional<T> and nullopt.
-//
-// Note: We're careful to support T having non-bool relationals.
-
-// Requires: The expression, e.g. "*x == *y" shall be well-formed and its result
-// shall be convertible to bool.
-// The C++17 (N4606) "Returns:" statements are translated into
-// code in an obvious way here, and the original text retained as function docs.
-// Returns: If bool(x) != bool(y), false; otherwise if bool(x) == false, true;
-// otherwise *x == *y.
-template <typename T, typename U>
-constexpr auto operator==(const optional<T>& x, const optional<U>& y)
-    -> decltype(optional_internal::convertible_to_bool(*x == *y)) {
-  return static_cast<bool>(x) != static_cast<bool>(y)
-             ? false
-             : static_cast<bool>(x) == false ? true
-                                             : static_cast<bool>(*x == *y);
-}
-
-// Returns: If bool(x) != bool(y), true; otherwise, if bool(x) == false, false;
-// otherwise *x != *y.
-template <typename T, typename U>
-constexpr auto operator!=(const optional<T>& x, const optional<U>& y)
-    -> decltype(optional_internal::convertible_to_bool(*x != *y)) {
-  return static_cast<bool>(x) != static_cast<bool>(y)
-             ? true
-             : static_cast<bool>(x) == false ? false
-                                             : static_cast<bool>(*x != *y);
-}
-// Returns: If !y, false; otherwise, if !x, true; otherwise *x < *y.
-template <typename T, typename U>
-constexpr auto operator<(const optional<T>& x, const optional<U>& y)
-    -> decltype(optional_internal::convertible_to_bool(*x < *y)) {
-  return !y ? false : !x ? true : static_cast<bool>(*x < *y);
-}
-// Returns: If !x, false; otherwise, if !y, true; otherwise *x > *y.
-template <typename T, typename U>
-constexpr auto operator>(const optional<T>& x, const optional<U>& y)
-    -> decltype(optional_internal::convertible_to_bool(*x > *y)) {
-  return !x ? false : !y ? true : static_cast<bool>(*x > *y);
-}
-// Returns: If !x, true; otherwise, if !y, false; otherwise *x <= *y.
-template <typename T, typename U>
-constexpr auto operator<=(const optional<T>& x, const optional<U>& y)
-    -> decltype(optional_internal::convertible_to_bool(*x <= *y)) {
-  return !x ? true : !y ? false : static_cast<bool>(*x <= *y);
-}
-// Returns: If !y, true; otherwise, if !x, false; otherwise *x >= *y.
-template <typename T, typename U>
-constexpr auto operator>=(const optional<T>& x, const optional<U>& y)
-    -> decltype(optional_internal::convertible_to_bool(*x >= *y)) {
-  return !y ? true : !x ? false : static_cast<bool>(*x >= *y);
-}
-
-// Comparison with nullopt [optional.nullops]
-// The C++17 (N4606) "Returns:" statements are used directly here.
-template <typename T>
-constexpr bool operator==(const optional<T>& x, nullopt_t) noexcept {
-  return !x;
-}
-template <typename T>
-constexpr bool operator==(nullopt_t, const optional<T>& x) noexcept {
-  return !x;
-}
-template <typename T>
-constexpr bool operator!=(const optional<T>& x, nullopt_t) noexcept {
-  return static_cast<bool>(x);
-}
-template <typename T>
-constexpr bool operator!=(nullopt_t, const optional<T>& x) noexcept {
-  return static_cast<bool>(x);
-}
-template <typename T>
-constexpr bool operator<(const optional<T>&, nullopt_t) noexcept {
-  return false;
-}
-template <typename T>
-constexpr bool operator<(nullopt_t, const optional<T>& x) noexcept {
-  return static_cast<bool>(x);
-}
-template <typename T>
-constexpr bool operator<=(const optional<T>& x, nullopt_t) noexcept {
-  return !x;
-}
-template <typename T>
-constexpr bool operator<=(nullopt_t, const optional<T>&) noexcept {
-  return true;
-}
-template <typename T>
-constexpr bool operator>(const optional<T>& x, nullopt_t) noexcept {
-  return static_cast<bool>(x);
-}
-template <typename T>
-constexpr bool operator>(nullopt_t, const optional<T>&) noexcept {
-  return false;
-}
-template <typename T>
-constexpr bool operator>=(const optional<T>&, nullopt_t) noexcept {
-  return true;
-}
-template <typename T>
-constexpr bool operator>=(nullopt_t, const optional<T>& x) noexcept {
-  return !x;
-}
-
-// Comparison with T [optional.comp_with_t]
-
-// Requires: The expression, e.g. "*x == v" shall be well-formed and its result
-// shall be convertible to bool.
-// The C++17 (N4606) "Equivalent to:" statements are used directly here.
-template <typename T, typename U>
-constexpr auto operator==(const optional<T>& x, const U& v)
-    -> decltype(optional_internal::convertible_to_bool(*x == v)) {
-  return static_cast<bool>(x) ? static_cast<bool>(*x == v) : false;
-}
-template <typename T, typename U>
-constexpr auto operator==(const U& v, const optional<T>& x)
-    -> decltype(optional_internal::convertible_to_bool(v == *x)) {
-  return static_cast<bool>(x) ? static_cast<bool>(v == *x) : false;
-}
-template <typename T, typename U>
-constexpr auto operator!=(const optional<T>& x, const U& v)
-    -> decltype(optional_internal::convertible_to_bool(*x != v)) {
-  return static_cast<bool>(x) ? static_cast<bool>(*x != v) : true;
-}
-template <typename T, typename U>
-constexpr auto operator!=(const U& v, const optional<T>& x)
-    -> decltype(optional_internal::convertible_to_bool(v != *x)) {
-  return static_cast<bool>(x) ? static_cast<bool>(v != *x) : true;
-}
-template <typename T, typename U>
-constexpr auto operator<(const optional<T>& x, const U& v)
-    -> decltype(optional_internal::convertible_to_bool(*x < v)) {
-  return static_cast<bool>(x) ? static_cast<bool>(*x < v) : true;
-}
-template <typename T, typename U>
-constexpr auto operator<(const U& v, const optional<T>& x)
-    -> decltype(optional_internal::convertible_to_bool(v < *x)) {
-  return static_cast<bool>(x) ? static_cast<bool>(v < *x) : false;
-}
-template <typename T, typename U>
-constexpr auto operator<=(const optional<T>& x, const U& v)
-    -> decltype(optional_internal::convertible_to_bool(*x <= v)) {
-  return static_cast<bool>(x) ? static_cast<bool>(*x <= v) : true;
-}
-template <typename T, typename U>
-constexpr auto operator<=(const U& v, const optional<T>& x)
-    -> decltype(optional_internal::convertible_to_bool(v <= *x)) {
-  return static_cast<bool>(x) ? static_cast<bool>(v <= *x) : false;
-}
-template <typename T, typename U>
-constexpr auto operator>(const optional<T>& x, const U& v)
-    -> decltype(optional_internal::convertible_to_bool(*x > v)) {
-  return static_cast<bool>(x) ? static_cast<bool>(*x > v) : false;
-}
-template <typename T, typename U>
-constexpr auto operator>(const U& v, const optional<T>& x)
-    -> decltype(optional_internal::convertible_to_bool(v > *x)) {
-  return static_cast<bool>(x) ? static_cast<bool>(v > *x) : true;
-}
-template <typename T, typename U>
-constexpr auto operator>=(const optional<T>& x, const U& v)
-    -> decltype(optional_internal::convertible_to_bool(*x >= v)) {
-  return static_cast<bool>(x) ? static_cast<bool>(*x >= v) : false;
-}
-template <typename T, typename U>
-constexpr auto operator>=(const U& v, const optional<T>& x)
-    -> decltype(optional_internal::convertible_to_bool(v >= *x)) {
-  return static_cast<bool>(x) ? static_cast<bool>(v >= *x) : true;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace std {
-
-// std::hash specialization for absl::optional.
-template <typename T>
-struct hash<absl::optional<T> >
-    : absl::optional_internal::optional_hash_base<T> {};
-
-}  // namespace std
-
-#undef ABSL_MSVC_CONSTEXPR_BUG_IN_UNION_LIKE_CLASS
-
-#endif  // ABSL_USES_STD_OPTIONAL
-
-#endif  // ABSL_TYPES_OPTIONAL_H_
diff --git a/third_party/abseil/absl/types/optional_exception_safety_test.cc b/third_party/abseil/absl/types/optional_exception_safety_test.cc
deleted file mode 100644
index 8e5fe85..0000000
--- a/third_party/abseil/absl/types/optional_exception_safety_test.cc
+++ /dev/null
@@ -1,292 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/optional.h"
-
-#include "absl/base/config.h"
-
-// This test is a no-op when absl::optional is an alias for std::optional and
-// when exceptions are not enabled.
-#if !defined(ABSL_USES_STD_OPTIONAL) && defined(ABSL_HAVE_EXCEPTIONS)
-
-#include "gtest/gtest.h"
-#include "absl/base/internal/exception_safety_testing.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-namespace {
-
-using ::testing::AssertionFailure;
-using ::testing::AssertionResult;
-using ::testing::AssertionSuccess;
-using ::testing::MakeExceptionSafetyTester;
-
-using Thrower = testing::ThrowingValue<testing::TypeSpec::kEverythingThrows>;
-using Optional = absl::optional<Thrower>;
-
-using MoveThrower = testing::ThrowingValue<testing::TypeSpec::kNoThrowMove>;
-using MoveOptional = absl::optional<MoveThrower>;
-
-constexpr int kInitialInteger = 5;
-constexpr int kUpdatedInteger = 10;
-
-template <typename OptionalT>
-bool ValueThrowsBadOptionalAccess(const OptionalT& optional) try {
-  return (static_cast<void>(optional.value()), false);
-} catch (const absl::bad_optional_access&) {
-  return true;
-}
-
-template <typename OptionalT>
-AssertionResult OptionalInvariants(OptionalT* optional_ptr) {
-  // Check the current state post-throw for validity
-  auto& optional = *optional_ptr;
-
-  if (optional.has_value() && ValueThrowsBadOptionalAccess(optional)) {
-    return AssertionFailure()
-           << "Optional with value should not throw bad_optional_access when "
-              "accessing the value.";
-  }
-  if (!optional.has_value() && !ValueThrowsBadOptionalAccess(optional)) {
-    return AssertionFailure()
-           << "Optional without a value should throw bad_optional_access when "
-              "accessing the value.";
-  }
-
-  // Reset to a known state
-  optional.reset();
-
-  // Confirm that the known post-reset state is valid
-  if (optional.has_value()) {
-    return AssertionFailure()
-           << "Optional should not contain a value after being reset.";
-  }
-  if (!ValueThrowsBadOptionalAccess(optional)) {
-    return AssertionFailure() << "Optional should throw bad_optional_access "
-                                 "when accessing the value after being reset.";
-  }
-
-  return AssertionSuccess();
-}
-
-template <typename OptionalT>
-AssertionResult CheckDisengaged(OptionalT* optional_ptr) {
-  auto& optional = *optional_ptr;
-
-  if (optional.has_value()) {
-    return AssertionFailure()
-           << "Expected optional to not contain a value but a value was found.";
-  }
-
-  return AssertionSuccess();
-}
-
-template <typename OptionalT>
-AssertionResult CheckEngaged(OptionalT* optional_ptr) {
-  auto& optional = *optional_ptr;
-
-  if (!optional.has_value()) {
-    return AssertionFailure()
-           << "Expected optional to contain a value but no value was found.";
-  }
-
-  return AssertionSuccess();
-}
-
-TEST(OptionalExceptionSafety, ThrowingConstructors) {
-  auto thrower_nonempty = Optional(Thrower(kInitialInteger));
-  testing::TestThrowingCtor<Optional>(thrower_nonempty);
-
-  auto integer_nonempty = absl::optional<int>(kInitialInteger);
-  testing::TestThrowingCtor<Optional>(integer_nonempty);
-  testing::TestThrowingCtor<Optional>(std::move(integer_nonempty));  // NOLINT
-
-  testing::TestThrowingCtor<Optional>(kInitialInteger);
-  using ThrowerVec = std::vector<Thrower, testing::ThrowingAllocator<Thrower>>;
-  testing::TestThrowingCtor<absl::optional<ThrowerVec>>(
-      absl::in_place,
-      std::initializer_list<Thrower>{Thrower(), Thrower(), Thrower()},
-      testing::ThrowingAllocator<Thrower>());
-}
-
-TEST(OptionalExceptionSafety, NothrowConstructors) {
-  // This constructor is marked noexcept. If it throws, the program will
-  // terminate.
-  testing::TestThrowingCtor<MoveOptional>(MoveOptional(kUpdatedInteger));
-}
-
-TEST(OptionalExceptionSafety, Emplace) {
-  // Test the basic guarantee plus test the result of optional::has_value()
-  // is false in all cases
-  auto disengaged_test = MakeExceptionSafetyTester().WithContracts(
-      OptionalInvariants<Optional>, CheckDisengaged<Optional>);
-  auto disengaged_test_empty = disengaged_test.WithInitialValue(Optional());
-  auto disengaged_test_nonempty =
-      disengaged_test.WithInitialValue(Optional(kInitialInteger));
-
-  auto emplace_thrower_directly = [](Optional* optional_ptr) {
-    optional_ptr->emplace(kUpdatedInteger);
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(emplace_thrower_directly));
-  EXPECT_TRUE(disengaged_test_nonempty.Test(emplace_thrower_directly));
-
-  auto emplace_thrower_copy = [](Optional* optional_ptr) {
-    auto thrower = Thrower(kUpdatedInteger, testing::nothrow_ctor);
-    optional_ptr->emplace(thrower);
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(emplace_thrower_copy));
-  EXPECT_TRUE(disengaged_test_nonempty.Test(emplace_thrower_copy));
-}
-
-TEST(OptionalExceptionSafety, EverythingThrowsSwap) {
-  // Test the basic guarantee plus test the result of optional::has_value()
-  // remains the same
-  auto test =
-      MakeExceptionSafetyTester().WithContracts(OptionalInvariants<Optional>);
-  auto disengaged_test_empty = test.WithInitialValue(Optional())
-                                   .WithContracts(CheckDisengaged<Optional>);
-  auto engaged_test_nonempty = test.WithInitialValue(Optional(kInitialInteger))
-                                   .WithContracts(CheckEngaged<Optional>);
-
-  auto swap_empty = [](Optional* optional_ptr) {
-    auto empty = Optional();
-    optional_ptr->swap(empty);
-  };
-  EXPECT_TRUE(engaged_test_nonempty.Test(swap_empty));
-
-  auto swap_nonempty = [](Optional* optional_ptr) {
-    auto nonempty =
-        Optional(absl::in_place, kUpdatedInteger, testing::nothrow_ctor);
-    optional_ptr->swap(nonempty);
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(swap_nonempty));
-  EXPECT_TRUE(engaged_test_nonempty.Test(swap_nonempty));
-}
-
-TEST(OptionalExceptionSafety, NoThrowMoveSwap) {
-  // Tests the nothrow guarantee for optional of T with non-throwing move
-  {
-    auto empty = MoveOptional();
-    auto nonempty = MoveOptional(kInitialInteger);
-    EXPECT_TRUE(testing::TestNothrowOp([&]() { nonempty.swap(empty); }));
-  }
-  {
-    auto nonempty = MoveOptional(kUpdatedInteger);
-    auto empty = MoveOptional();
-    EXPECT_TRUE(testing::TestNothrowOp([&]() { empty.swap(nonempty); }));
-  }
-  {
-    auto nonempty_from = MoveOptional(kUpdatedInteger);
-    auto nonempty_to = MoveOptional(kInitialInteger);
-    EXPECT_TRUE(
-        testing::TestNothrowOp([&]() { nonempty_to.swap(nonempty_from); }));
-  }
-}
-
-TEST(OptionalExceptionSafety, CopyAssign) {
-  // Test the basic guarantee plus test the result of optional::has_value()
-  // remains the same
-  auto test =
-      MakeExceptionSafetyTester().WithContracts(OptionalInvariants<Optional>);
-  auto disengaged_test_empty = test.WithInitialValue(Optional())
-                                   .WithContracts(CheckDisengaged<Optional>);
-  auto engaged_test_nonempty = test.WithInitialValue(Optional(kInitialInteger))
-                                   .WithContracts(CheckEngaged<Optional>);
-
-  auto copyassign_nonempty = [](Optional* optional_ptr) {
-    auto nonempty =
-        Optional(absl::in_place, kUpdatedInteger, testing::nothrow_ctor);
-    *optional_ptr = nonempty;
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(copyassign_nonempty));
-  EXPECT_TRUE(engaged_test_nonempty.Test(copyassign_nonempty));
-
-  auto copyassign_thrower = [](Optional* optional_ptr) {
-    auto thrower = Thrower(kUpdatedInteger, testing::nothrow_ctor);
-    *optional_ptr = thrower;
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(copyassign_thrower));
-  EXPECT_TRUE(engaged_test_nonempty.Test(copyassign_thrower));
-}
-
-TEST(OptionalExceptionSafety, MoveAssign) {
-  // Test the basic guarantee plus test the result of optional::has_value()
-  // remains the same
-  auto test =
-      MakeExceptionSafetyTester().WithContracts(OptionalInvariants<Optional>);
-  auto disengaged_test_empty = test.WithInitialValue(Optional())
-                                   .WithContracts(CheckDisengaged<Optional>);
-  auto engaged_test_nonempty = test.WithInitialValue(Optional(kInitialInteger))
-                                   .WithContracts(CheckEngaged<Optional>);
-
-  auto moveassign_empty = [](Optional* optional_ptr) {
-    auto empty = Optional();
-    *optional_ptr = std::move(empty);
-  };
-  EXPECT_TRUE(engaged_test_nonempty.Test(moveassign_empty));
-
-  auto moveassign_nonempty = [](Optional* optional_ptr) {
-    auto nonempty =
-        Optional(absl::in_place, kUpdatedInteger, testing::nothrow_ctor);
-    *optional_ptr = std::move(nonempty);
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(moveassign_nonempty));
-  EXPECT_TRUE(engaged_test_nonempty.Test(moveassign_nonempty));
-
-  auto moveassign_thrower = [](Optional* optional_ptr) {
-    auto thrower = Thrower(kUpdatedInteger, testing::nothrow_ctor);
-    *optional_ptr = std::move(thrower);
-  };
-  EXPECT_TRUE(disengaged_test_empty.Test(moveassign_thrower));
-  EXPECT_TRUE(engaged_test_nonempty.Test(moveassign_thrower));
-}
-
-TEST(OptionalExceptionSafety, NothrowMoveAssign) {
-  // Tests the nothrow guarantee for optional of T with non-throwing move
-  {
-    auto empty = MoveOptional();
-    auto nonempty = MoveOptional(kInitialInteger);
-    EXPECT_TRUE(testing::TestNothrowOp([&]() { nonempty = std::move(empty); }));
-  }
-  {
-    auto nonempty = MoveOptional(kInitialInteger);
-    auto empty = MoveOptional();
-    EXPECT_TRUE(testing::TestNothrowOp([&]() { empty = std::move(nonempty); }));
-  }
-  {
-    auto nonempty_from = MoveOptional(kUpdatedInteger);
-    auto nonempty_to = MoveOptional(kInitialInteger);
-    EXPECT_TRUE(testing::TestNothrowOp(
-        [&]() { nonempty_to = std::move(nonempty_from); }));
-  }
-  {
-    auto thrower = MoveThrower(kUpdatedInteger);
-    auto empty = MoveOptional();
-    EXPECT_TRUE(testing::TestNothrowOp([&]() { empty = std::move(thrower); }));
-  }
-  {
-    auto thrower = MoveThrower(kUpdatedInteger);
-    auto nonempty = MoveOptional(kInitialInteger);
-    EXPECT_TRUE(
-        testing::TestNothrowOp([&]() { nonempty = std::move(thrower); }));
-  }
-}
-
-}  // namespace
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // #if !defined(ABSL_USES_STD_OPTIONAL) && defined(ABSL_HAVE_EXCEPTIONS)
diff --git a/third_party/abseil/absl/types/optional_test.cc b/third_party/abseil/absl/types/optional_test.cc
deleted file mode 100644
index 7ef142c..0000000
--- a/third_party/abseil/absl/types/optional_test.cc
+++ /dev/null
@@ -1,1659 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/optional.h"
-
-// This test is a no-op when absl::optional is an alias for std::optional.
-#if !defined(ABSL_USES_STD_OPTIONAL)
-
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/raw_logging.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-
-struct Hashable {};
-
-namespace std {
-template <>
-struct hash<Hashable> {
-  size_t operator()(const Hashable&) { return 0; }
-};
-}  // namespace std
-
-struct NonHashable {};
-
-namespace {
-
-std::string TypeQuals(std::string&) { return "&"; }
-std::string TypeQuals(std::string&&) { return "&&"; }
-std::string TypeQuals(const std::string&) { return "c&"; }
-std::string TypeQuals(const std::string&&) { return "c&&"; }
-
-struct StructorListener {
-  int construct0 = 0;
-  int construct1 = 0;
-  int construct2 = 0;
-  int listinit = 0;
-  int copy = 0;
-  int move = 0;
-  int copy_assign = 0;
-  int move_assign = 0;
-  int destruct = 0;
-  int volatile_copy = 0;
-  int volatile_move = 0;
-  int volatile_copy_assign = 0;
-  int volatile_move_assign = 0;
-};
-
-// Suppress MSVC warnings.
-// 4521: multiple copy constructors specified
-// 4522: multiple assignment operators specified
-// We wrote multiple of them to test that the correct overloads are selected.
-#ifdef _MSC_VER
-#pragma warning( push )
-#pragma warning( disable : 4521)
-#pragma warning( disable : 4522)
-#endif
-struct Listenable {
-  static StructorListener* listener;
-
-  Listenable() { ++listener->construct0; }
-  explicit Listenable(int /*unused*/) { ++listener->construct1; }
-  Listenable(int /*unused*/, int /*unused*/) { ++listener->construct2; }
-  Listenable(std::initializer_list<int> /*unused*/) { ++listener->listinit; }
-  Listenable(const Listenable& /*unused*/) { ++listener->copy; }
-  Listenable(const volatile Listenable& /*unused*/) {
-    ++listener->volatile_copy;
-  }
-  Listenable(volatile Listenable&& /*unused*/) { ++listener->volatile_move; }
-  Listenable(Listenable&& /*unused*/) { ++listener->move; }
-  Listenable& operator=(const Listenable& /*unused*/) {
-    ++listener->copy_assign;
-    return *this;
-  }
-  Listenable& operator=(Listenable&& /*unused*/) {
-    ++listener->move_assign;
-    return *this;
-  }
-  // use void return type instead of volatile T& to work around GCC warning
-  // when the assignment's returned reference is ignored.
-  void operator=(const volatile Listenable& /*unused*/) volatile {
-    ++listener->volatile_copy_assign;
-  }
-  void operator=(volatile Listenable&& /*unused*/) volatile {
-    ++listener->volatile_move_assign;
-  }
-  ~Listenable() { ++listener->destruct; }
-};
-#ifdef _MSC_VER
-#pragma warning( pop )
-#endif
-
-StructorListener* Listenable::listener = nullptr;
-
-// ABSL_HAVE_NO_CONSTEXPR_INITIALIZER_LIST is defined to 1 when the standard
-// library implementation doesn't marked initializer_list's default constructor
-// constexpr. The C++11 standard doesn't specify constexpr on it, but C++14
-// added it. However, libstdc++ 4.7 marked it constexpr.
-#if defined(_LIBCPP_VERSION) && \
-    (_LIBCPP_STD_VER <= 11 || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR))
-#define ABSL_HAVE_NO_CONSTEXPR_INITIALIZER_LIST 1
-#endif
-
-struct ConstexprType {
-  enum CtorTypes {
-    kCtorDefault,
-    kCtorInt,
-    kCtorInitializerList,
-    kCtorConstChar
-  };
-  constexpr ConstexprType() : x(kCtorDefault) {}
-  constexpr explicit ConstexprType(int i) : x(kCtorInt) {}
-#ifndef ABSL_HAVE_NO_CONSTEXPR_INITIALIZER_LIST
-  constexpr ConstexprType(std::initializer_list<int> il)
-      : x(kCtorInitializerList) {}
-#endif
-  constexpr ConstexprType(const char*)  // NOLINT(runtime/explicit)
-      : x(kCtorConstChar) {}
-  int x;
-};
-
-struct Copyable {
-  Copyable() {}
-  Copyable(const Copyable&) {}
-  Copyable& operator=(const Copyable&) { return *this; }
-};
-
-struct MoveableThrow {
-  MoveableThrow() {}
-  MoveableThrow(MoveableThrow&&) {}
-  MoveableThrow& operator=(MoveableThrow&&) { return *this; }
-};
-
-struct MoveableNoThrow {
-  MoveableNoThrow() {}
-  MoveableNoThrow(MoveableNoThrow&&) noexcept {}
-  MoveableNoThrow& operator=(MoveableNoThrow&&) noexcept { return *this; }
-};
-
-struct NonMovable {
-  NonMovable() {}
-  NonMovable(const NonMovable&) = delete;
-  NonMovable& operator=(const NonMovable&) = delete;
-  NonMovable(NonMovable&&) = delete;
-  NonMovable& operator=(NonMovable&&) = delete;
-};
-
-struct NoDefault {
-  NoDefault() = delete;
-  NoDefault(const NoDefault&) {}
-  NoDefault& operator=(const NoDefault&) { return *this; }
-};
-
-struct ConvertsFromInPlaceT {
-  ConvertsFromInPlaceT(absl::in_place_t) {}  // NOLINT
-};
-
-TEST(optionalTest, DefaultConstructor) {
-  absl::optional<int> empty;
-  EXPECT_FALSE(empty);
-  constexpr absl::optional<int> cempty;
-  static_assert(!cempty.has_value(), "");
-  EXPECT_TRUE(
-      std::is_nothrow_default_constructible<absl::optional<int>>::value);
-}
-
-TEST(optionalTest, nulloptConstructor) {
-  absl::optional<int> empty(absl::nullopt);
-  EXPECT_FALSE(empty);
-  constexpr absl::optional<int> cempty{absl::nullopt};
-  static_assert(!cempty.has_value(), "");
-  EXPECT_TRUE((std::is_nothrow_constructible<absl::optional<int>,
-                                             absl::nullopt_t>::value));
-}
-
-TEST(optionalTest, CopyConstructor) {
-  {
-    absl::optional<int> empty, opt42 = 42;
-    absl::optional<int> empty_copy(empty);
-    EXPECT_FALSE(empty_copy);
-    absl::optional<int> opt42_copy(opt42);
-    EXPECT_TRUE(opt42_copy);
-    EXPECT_EQ(42, *opt42_copy);
-  }
-  {
-    absl::optional<const int> empty, opt42 = 42;
-    absl::optional<const int> empty_copy(empty);
-    EXPECT_FALSE(empty_copy);
-    absl::optional<const int> opt42_copy(opt42);
-    EXPECT_TRUE(opt42_copy);
-    EXPECT_EQ(42, *opt42_copy);
-  }
-  {
-    absl::optional<volatile int> empty, opt42 = 42;
-    absl::optional<volatile int> empty_copy(empty);
-    EXPECT_FALSE(empty_copy);
-    absl::optional<volatile int> opt42_copy(opt42);
-    EXPECT_TRUE(opt42_copy);
-    EXPECT_EQ(42, *opt42_copy);
-  }
-  // test copyablility
-  EXPECT_TRUE(std::is_copy_constructible<absl::optional<int>>::value);
-  EXPECT_TRUE(std::is_copy_constructible<absl::optional<Copyable>>::value);
-  EXPECT_FALSE(
-      std::is_copy_constructible<absl::optional<MoveableThrow>>::value);
-  EXPECT_FALSE(
-      std::is_copy_constructible<absl::optional<MoveableNoThrow>>::value);
-  EXPECT_FALSE(std::is_copy_constructible<absl::optional<NonMovable>>::value);
-
-  EXPECT_FALSE(
-      absl::is_trivially_copy_constructible<absl::optional<Copyable>>::value);
-#if defined(ABSL_USES_STD_OPTIONAL) && defined(__GLIBCXX__)
-  // libstdc++ std::optional implementation (as of 7.2) has a bug: when T is
-  // trivially copyable, optional<T> is not trivially copyable (due to one of
-  // its base class is unconditionally nontrivial).
-#define ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG 1
-#endif
-#ifndef ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG
-  EXPECT_TRUE(
-      absl::is_trivially_copy_constructible<absl::optional<int>>::value);
-  EXPECT_TRUE(
-      absl::is_trivially_copy_constructible<absl::optional<const int>>::value);
-#ifndef _MSC_VER
-  // See defect report "Trivial copy/move constructor for class with volatile
-  // member" at
-  // http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#2094
-  // A class with non-static data member of volatile-qualified type should still
-  // have a trivial copy constructor if the data member is trivial.
-  // Also a cv-qualified scalar type should be trivially copyable.
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<
-              absl::optional<volatile int>>::value);
-#endif  // _MSC_VER
-#endif  // ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG
-
-  // constexpr copy constructor for trivially copyable types
-  {
-    constexpr absl::optional<int> o1;
-    constexpr absl::optional<int> o2 = o1;
-    static_assert(!o2, "");
-  }
-  {
-    constexpr absl::optional<int> o1 = 42;
-    constexpr absl::optional<int> o2 = o1;
-    static_assert(o2, "");
-    static_assert(*o2 == 42, "");
-  }
-  {
-    struct TrivialCopyable {
-      constexpr TrivialCopyable() : x(0) {}
-      constexpr explicit TrivialCopyable(int i) : x(i) {}
-      int x;
-    };
-    constexpr absl::optional<TrivialCopyable> o1(42);
-    constexpr absl::optional<TrivialCopyable> o2 = o1;
-    static_assert(o2, "");
-    static_assert((*o2).x == 42, "");
-#ifndef ABSL_GLIBCXX_OPTIONAL_TRIVIALITY_BUG
-    EXPECT_TRUE(absl::is_trivially_copy_constructible<
-                absl::optional<TrivialCopyable>>::value);
-    EXPECT_TRUE(absl::is_trivially_copy_constructible<
-                absl::optional<const TrivialCopyable>>::value);
-#endif
-    // When testing with VS 2017 15.3, there seems to be a bug in MSVC
-    // std::optional when T is volatile-qualified. So skipping this test.
-    // Bug report:
-    // https://connect.microsoft.com/VisualStudio/feedback/details/3142534
-#if defined(ABSL_USES_STD_OPTIONAL) && defined(_MSC_VER) && _MSC_VER >= 1911
-#define ABSL_MSVC_OPTIONAL_VOLATILE_COPY_BUG 1
-#endif
-#ifndef ABSL_MSVC_OPTIONAL_VOLATILE_COPY_BUG
-    EXPECT_FALSE(std::is_copy_constructible<
-                 absl::optional<volatile TrivialCopyable>>::value);
-#endif
-  }
-}
-
-TEST(optionalTest, MoveConstructor) {
-  absl::optional<int> empty, opt42 = 42;
-  absl::optional<int> empty_move(std::move(empty));
-  EXPECT_FALSE(empty_move);
-  absl::optional<int> opt42_move(std::move(opt42));
-  EXPECT_TRUE(opt42_move);
-  EXPECT_EQ(42, opt42_move);
-  // test movability
-  EXPECT_TRUE(std::is_move_constructible<absl::optional<int>>::value);
-  EXPECT_TRUE(std::is_move_constructible<absl::optional<Copyable>>::value);
-  EXPECT_TRUE(std::is_move_constructible<absl::optional<MoveableThrow>>::value);
-  EXPECT_TRUE(
-      std::is_move_constructible<absl::optional<MoveableNoThrow>>::value);
-  EXPECT_FALSE(std::is_move_constructible<absl::optional<NonMovable>>::value);
-  // test noexcept
-  EXPECT_TRUE(std::is_nothrow_move_constructible<absl::optional<int>>::value);
-#ifndef ABSL_USES_STD_OPTIONAL
-  EXPECT_EQ(
-      absl::default_allocator_is_nothrow::value,
-      std::is_nothrow_move_constructible<absl::optional<MoveableThrow>>::value);
-#endif
-  EXPECT_TRUE(std::is_nothrow_move_constructible<
-              absl::optional<MoveableNoThrow>>::value);
-}
-
-TEST(optionalTest, Destructor) {
-  struct Trivial {};
-
-  struct NonTrivial {
-    NonTrivial(const NonTrivial&) {}
-    NonTrivial& operator=(const NonTrivial&) { return *this; }
-    ~NonTrivial() {}
-  };
-
-  EXPECT_TRUE(std::is_trivially_destructible<absl::optional<int>>::value);
-  EXPECT_TRUE(std::is_trivially_destructible<absl::optional<Trivial>>::value);
-  EXPECT_FALSE(
-      std::is_trivially_destructible<absl::optional<NonTrivial>>::value);
-}
-
-TEST(optionalTest, InPlaceConstructor) {
-  constexpr absl::optional<ConstexprType> opt0{absl::in_place_t()};
-  static_assert(opt0, "");
-  static_assert((*opt0).x == ConstexprType::kCtorDefault, "");
-  constexpr absl::optional<ConstexprType> opt1{absl::in_place_t(), 1};
-  static_assert(opt1, "");
-  static_assert((*opt1).x == ConstexprType::kCtorInt, "");
-#ifndef ABSL_HAVE_NO_CONSTEXPR_INITIALIZER_LIST
-  constexpr absl::optional<ConstexprType> opt2{absl::in_place_t(), {1, 2}};
-  static_assert(opt2, "");
-  static_assert((*opt2).x == ConstexprType::kCtorInitializerList, "");
-#endif
-
-  EXPECT_FALSE((std::is_constructible<absl::optional<ConvertsFromInPlaceT>,
-                                      absl::in_place_t>::value));
-  EXPECT_FALSE((std::is_constructible<absl::optional<ConvertsFromInPlaceT>,
-                                      const absl::in_place_t&>::value));
-  EXPECT_TRUE(
-      (std::is_constructible<absl::optional<ConvertsFromInPlaceT>,
-                             absl::in_place_t, absl::in_place_t>::value));
-
-  EXPECT_FALSE((std::is_constructible<absl::optional<NoDefault>,
-                                      absl::in_place_t>::value));
-  EXPECT_FALSE((std::is_constructible<absl::optional<NoDefault>,
-                                      absl::in_place_t&&>::value));
-}
-
-// template<U=T> optional(U&&);
-TEST(optionalTest, ValueConstructor) {
-  constexpr absl::optional<int> opt0(0);
-  static_assert(opt0, "");
-  static_assert(*opt0 == 0, "");
-  EXPECT_TRUE((std::is_convertible<int, absl::optional<int>>::value));
-  // Copy initialization ( = "abc") won't work due to optional(optional&&)
-  // is not constexpr. Use list initialization instead. This invokes
-  // absl::optional<ConstexprType>::absl::optional<U>(U&&), with U = const char
-  // (&) [4], which direct-initializes the ConstexprType value held by the
-  // optional via ConstexprType::ConstexprType(const char*).
-  constexpr absl::optional<ConstexprType> opt1 = {"abc"};
-  static_assert(opt1, "");
-  static_assert(ConstexprType::kCtorConstChar == (*opt1).x, "");
-  EXPECT_TRUE(
-      (std::is_convertible<const char*, absl::optional<ConstexprType>>::value));
-  // direct initialization
-  constexpr absl::optional<ConstexprType> opt2{2};
-  static_assert(opt2, "");
-  static_assert(ConstexprType::kCtorInt == (*opt2).x, "");
-  EXPECT_FALSE(
-      (std::is_convertible<int, absl::optional<ConstexprType>>::value));
-
-  // this invokes absl::optional<int>::optional(int&&)
-  // NOTE: this has different behavior than assignment, e.g.
-  // "opt3 = {};" clears the optional rather than setting the value to 0
-  // According to C++17 standard N4659 [over.ics.list] 16.3.3.1.5, (9.2)- "if
-  // the initializer list has no elements, the implicit conversion is the
-  // identity conversion", so `optional(int&&)` should be a better match than
-  // `optional(optional&&)` which is a user-defined conversion.
-  // Note: GCC 7 has a bug with this overload selection when compiled with
-  // `-std=c++17`.
-#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ == 7 && \
-    __cplusplus == 201703L
-#define ABSL_GCC7_OVER_ICS_LIST_BUG 1
-#endif
-#ifndef ABSL_GCC7_OVER_ICS_LIST_BUG
-  constexpr absl::optional<int> opt3({});
-  static_assert(opt3, "");
-  static_assert(*opt3 == 0, "");
-#endif
-
-  // this invokes the move constructor with a default constructed optional
-  // because non-template function is a better match than template function.
-  absl::optional<ConstexprType> opt4({});
-  EXPECT_FALSE(opt4);
-}
-
-struct Implicit {};
-
-struct Explicit {};
-
-struct Convert {
-  Convert(const Implicit&)  // NOLINT(runtime/explicit)
-      : implicit(true), move(false) {}
-  Convert(Implicit&&)  // NOLINT(runtime/explicit)
-      : implicit(true), move(true) {}
-  explicit Convert(const Explicit&) : implicit(false), move(false) {}
-  explicit Convert(Explicit&&) : implicit(false), move(true) {}
-
-  bool implicit;
-  bool move;
-};
-
-struct ConvertFromOptional {
-  ConvertFromOptional(const Implicit&)  // NOLINT(runtime/explicit)
-      : implicit(true), move(false), from_optional(false) {}
-  ConvertFromOptional(Implicit&&)  // NOLINT(runtime/explicit)
-      : implicit(true), move(true), from_optional(false) {}
-  ConvertFromOptional(
-      const absl::optional<Implicit>&)  // NOLINT(runtime/explicit)
-      : implicit(true), move(false), from_optional(true) {}
-  ConvertFromOptional(absl::optional<Implicit>&&)  // NOLINT(runtime/explicit)
-      : implicit(true), move(true), from_optional(true) {}
-  explicit ConvertFromOptional(const Explicit&)
-      : implicit(false), move(false), from_optional(false) {}
-  explicit ConvertFromOptional(Explicit&&)
-      : implicit(false), move(true), from_optional(false) {}
-  explicit ConvertFromOptional(const absl::optional<Explicit>&)
-      : implicit(false), move(false), from_optional(true) {}
-  explicit ConvertFromOptional(absl::optional<Explicit>&&)
-      : implicit(false), move(true), from_optional(true) {}
-
-  bool implicit;
-  bool move;
-  bool from_optional;
-};
-
-TEST(optionalTest, ConvertingConstructor) {
-  absl::optional<Implicit> i_empty;
-  absl::optional<Implicit> i(absl::in_place);
-  absl::optional<Explicit> e_empty;
-  absl::optional<Explicit> e(absl::in_place);
-  {
-    // implicitly constructing absl::optional<Convert> from
-    // absl::optional<Implicit>
-    absl::optional<Convert> empty = i_empty;
-    EXPECT_FALSE(empty);
-    absl::optional<Convert> opt_copy = i;
-    EXPECT_TRUE(opt_copy);
-    EXPECT_TRUE(opt_copy->implicit);
-    EXPECT_FALSE(opt_copy->move);
-    absl::optional<Convert> opt_move = absl::optional<Implicit>(absl::in_place);
-    EXPECT_TRUE(opt_move);
-    EXPECT_TRUE(opt_move->implicit);
-    EXPECT_TRUE(opt_move->move);
-  }
-  {
-    // explicitly constructing absl::optional<Convert> from
-    // absl::optional<Explicit>
-    absl::optional<Convert> empty(e_empty);
-    EXPECT_FALSE(empty);
-    absl::optional<Convert> opt_copy(e);
-    EXPECT_TRUE(opt_copy);
-    EXPECT_FALSE(opt_copy->implicit);
-    EXPECT_FALSE(opt_copy->move);
-    EXPECT_FALSE((std::is_convertible<const absl::optional<Explicit>&,
-                                      absl::optional<Convert>>::value));
-    absl::optional<Convert> opt_move{absl::optional<Explicit>(absl::in_place)};
-    EXPECT_TRUE(opt_move);
-    EXPECT_FALSE(opt_move->implicit);
-    EXPECT_TRUE(opt_move->move);
-    EXPECT_FALSE((std::is_convertible<absl::optional<Explicit>&&,
-                                      absl::optional<Convert>>::value));
-  }
-  {
-    // implicitly constructing absl::optional<ConvertFromOptional> from
-    // absl::optional<Implicit> via
-    // ConvertFromOptional(absl::optional<Implicit>&&) check that
-    // ConvertFromOptional(Implicit&&) is NOT called
-    static_assert(
-        std::is_convertible<absl::optional<Implicit>,
-                            absl::optional<ConvertFromOptional>>::value,
-        "");
-    absl::optional<ConvertFromOptional> opt0 = i_empty;
-    EXPECT_TRUE(opt0);
-    EXPECT_TRUE(opt0->implicit);
-    EXPECT_FALSE(opt0->move);
-    EXPECT_TRUE(opt0->from_optional);
-    absl::optional<ConvertFromOptional> opt1 = absl::optional<Implicit>();
-    EXPECT_TRUE(opt1);
-    EXPECT_TRUE(opt1->implicit);
-    EXPECT_TRUE(opt1->move);
-    EXPECT_TRUE(opt1->from_optional);
-  }
-  {
-    // implicitly constructing absl::optional<ConvertFromOptional> from
-    // absl::optional<Explicit> via
-    // ConvertFromOptional(absl::optional<Explicit>&&) check that
-    // ConvertFromOptional(Explicit&&) is NOT called
-    absl::optional<ConvertFromOptional> opt0(e_empty);
-    EXPECT_TRUE(opt0);
-    EXPECT_FALSE(opt0->implicit);
-    EXPECT_FALSE(opt0->move);
-    EXPECT_TRUE(opt0->from_optional);
-    EXPECT_FALSE(
-        (std::is_convertible<const absl::optional<Explicit>&,
-                             absl::optional<ConvertFromOptional>>::value));
-    absl::optional<ConvertFromOptional> opt1{absl::optional<Explicit>()};
-    EXPECT_TRUE(opt1);
-    EXPECT_FALSE(opt1->implicit);
-    EXPECT_TRUE(opt1->move);
-    EXPECT_TRUE(opt1->from_optional);
-    EXPECT_FALSE(
-        (std::is_convertible<absl::optional<Explicit>&&,
-                             absl::optional<ConvertFromOptional>>::value));
-  }
-}
-
-TEST(optionalTest, StructorBasic) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-  {
-    absl::optional<Listenable> empty;
-    EXPECT_FALSE(empty);
-    absl::optional<Listenable> opt0(absl::in_place);
-    EXPECT_TRUE(opt0);
-    absl::optional<Listenable> opt1(absl::in_place, 1);
-    EXPECT_TRUE(opt1);
-    absl::optional<Listenable> opt2(absl::in_place, 1, 2);
-    EXPECT_TRUE(opt2);
-  }
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(1, listener.construct1);
-  EXPECT_EQ(1, listener.construct2);
-  EXPECT_EQ(3, listener.destruct);
-}
-
-TEST(optionalTest, CopyMoveStructor) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-  absl::optional<Listenable> original(absl::in_place);
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(0, listener.copy);
-  EXPECT_EQ(0, listener.move);
-  absl::optional<Listenable> copy(original);
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(1, listener.copy);
-  EXPECT_EQ(0, listener.move);
-  absl::optional<Listenable> move(std::move(original));
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(1, listener.copy);
-  EXPECT_EQ(1, listener.move);
-}
-
-TEST(optionalTest, ListInit) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-  absl::optional<Listenable> listinit1(absl::in_place, {1});
-  absl::optional<Listenable> listinit2(absl::in_place, {1, 2});
-  EXPECT_EQ(2, listener.listinit);
-}
-
-TEST(optionalTest, AssignFromNullopt) {
-  absl::optional<int> opt(1);
-  opt = absl::nullopt;
-  EXPECT_FALSE(opt);
-
-  StructorListener listener;
-  Listenable::listener = &listener;
-  absl::optional<Listenable> opt1(absl::in_place);
-  opt1 = absl::nullopt;
-  EXPECT_FALSE(opt1);
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(1, listener.destruct);
-
-  EXPECT_TRUE((
-      std::is_nothrow_assignable<absl::optional<int>, absl::nullopt_t>::value));
-  EXPECT_TRUE((std::is_nothrow_assignable<absl::optional<Listenable>,
-                                          absl::nullopt_t>::value));
-}
-
-TEST(optionalTest, CopyAssignment) {
-  const absl::optional<int> empty, opt1 = 1, opt2 = 2;
-  absl::optional<int> empty_to_opt1, opt1_to_opt2, opt2_to_empty;
-
-  EXPECT_FALSE(empty_to_opt1);
-  empty_to_opt1 = empty;
-  EXPECT_FALSE(empty_to_opt1);
-  empty_to_opt1 = opt1;
-  EXPECT_TRUE(empty_to_opt1);
-  EXPECT_EQ(1, empty_to_opt1.value());
-
-  EXPECT_FALSE(opt1_to_opt2);
-  opt1_to_opt2 = opt1;
-  EXPECT_TRUE(opt1_to_opt2);
-  EXPECT_EQ(1, opt1_to_opt2.value());
-  opt1_to_opt2 = opt2;
-  EXPECT_TRUE(opt1_to_opt2);
-  EXPECT_EQ(2, opt1_to_opt2.value());
-
-  EXPECT_FALSE(opt2_to_empty);
-  opt2_to_empty = opt2;
-  EXPECT_TRUE(opt2_to_empty);
-  EXPECT_EQ(2, opt2_to_empty.value());
-  opt2_to_empty = empty;
-  EXPECT_FALSE(opt2_to_empty);
-
-  EXPECT_FALSE(absl::is_copy_assignable<absl::optional<const int>>::value);
-  EXPECT_TRUE(absl::is_copy_assignable<absl::optional<Copyable>>::value);
-  EXPECT_FALSE(absl::is_copy_assignable<absl::optional<MoveableThrow>>::value);
-  EXPECT_FALSE(
-      absl::is_copy_assignable<absl::optional<MoveableNoThrow>>::value);
-  EXPECT_FALSE(absl::is_copy_assignable<absl::optional<NonMovable>>::value);
-
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<int>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<volatile int>::value);
-
-  struct Trivial {
-    int i;
-  };
-  struct NonTrivial {
-    NonTrivial& operator=(const NonTrivial&) { return *this; }
-    int i;
-  };
-
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial>::value);
-  EXPECT_FALSE(absl::is_copy_assignable<const Trivial>::value);
-  EXPECT_FALSE(absl::is_copy_assignable<volatile Trivial>::value);
-  EXPECT_TRUE(absl::is_copy_assignable<NonTrivial>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<NonTrivial>::value);
-
-  // std::optional doesn't support volatile nontrivial types.
-#ifndef ABSL_USES_STD_OPTIONAL
-  {
-    StructorListener listener;
-    Listenable::listener = &listener;
-
-    absl::optional<volatile Listenable> empty, set(absl::in_place);
-    EXPECT_EQ(1, listener.construct0);
-    absl::optional<volatile Listenable> empty_to_empty, empty_to_set,
-        set_to_empty(absl::in_place), set_to_set(absl::in_place);
-    EXPECT_EQ(3, listener.construct0);
-    empty_to_empty = empty;  // no effect
-    empty_to_set = set;      // copy construct
-    set_to_empty = empty;    // destruct
-    set_to_set = set;        // copy assign
-    EXPECT_EQ(1, listener.volatile_copy);
-    EXPECT_EQ(0, listener.volatile_move);
-    EXPECT_EQ(1, listener.destruct);
-    EXPECT_EQ(1, listener.volatile_copy_assign);
-  }
-#endif  // ABSL_USES_STD_OPTIONAL
-}
-
-TEST(optionalTest, MoveAssignment) {
-  {
-    StructorListener listener;
-    Listenable::listener = &listener;
-
-    absl::optional<Listenable> empty1, empty2, set1(absl::in_place),
-        set2(absl::in_place);
-    EXPECT_EQ(2, listener.construct0);
-    absl::optional<Listenable> empty_to_empty, empty_to_set,
-        set_to_empty(absl::in_place), set_to_set(absl::in_place);
-    EXPECT_EQ(4, listener.construct0);
-    empty_to_empty = std::move(empty1);
-    empty_to_set = std::move(set1);
-    set_to_empty = std::move(empty2);
-    set_to_set = std::move(set2);
-    EXPECT_EQ(0, listener.copy);
-    EXPECT_EQ(1, listener.move);
-    EXPECT_EQ(1, listener.destruct);
-    EXPECT_EQ(1, listener.move_assign);
-  }
-  // std::optional doesn't support volatile nontrivial types.
-#ifndef ABSL_USES_STD_OPTIONAL
-  {
-    StructorListener listener;
-    Listenable::listener = &listener;
-
-    absl::optional<volatile Listenable> empty1, empty2, set1(absl::in_place),
-        set2(absl::in_place);
-    EXPECT_EQ(2, listener.construct0);
-    absl::optional<volatile Listenable> empty_to_empty, empty_to_set,
-        set_to_empty(absl::in_place), set_to_set(absl::in_place);
-    EXPECT_EQ(4, listener.construct0);
-    empty_to_empty = std::move(empty1);  // no effect
-    empty_to_set = std::move(set1);      // move construct
-    set_to_empty = std::move(empty2);    // destruct
-    set_to_set = std::move(set2);        // move assign
-    EXPECT_EQ(0, listener.volatile_copy);
-    EXPECT_EQ(1, listener.volatile_move);
-    EXPECT_EQ(1, listener.destruct);
-    EXPECT_EQ(1, listener.volatile_move_assign);
-  }
-#endif  // ABSL_USES_STD_OPTIONAL
-  EXPECT_FALSE(absl::is_move_assignable<absl::optional<const int>>::value);
-  EXPECT_TRUE(absl::is_move_assignable<absl::optional<Copyable>>::value);
-  EXPECT_TRUE(absl::is_move_assignable<absl::optional<MoveableThrow>>::value);
-  EXPECT_TRUE(absl::is_move_assignable<absl::optional<MoveableNoThrow>>::value);
-  EXPECT_FALSE(absl::is_move_assignable<absl::optional<NonMovable>>::value);
-
-  EXPECT_FALSE(
-      std::is_nothrow_move_assignable<absl::optional<MoveableThrow>>::value);
-  EXPECT_TRUE(
-      std::is_nothrow_move_assignable<absl::optional<MoveableNoThrow>>::value);
-}
-
-struct NoConvertToOptional {
-  // disable implicit conversion from const NoConvertToOptional&
-  // to absl::optional<NoConvertToOptional>.
-  NoConvertToOptional(const NoConvertToOptional&) = delete;
-};
-
-struct CopyConvert {
-  CopyConvert(const NoConvertToOptional&);
-  CopyConvert& operator=(const CopyConvert&) = delete;
-  CopyConvert& operator=(const NoConvertToOptional&);
-};
-
-struct CopyConvertFromOptional {
-  CopyConvertFromOptional(const NoConvertToOptional&);
-  CopyConvertFromOptional(const absl::optional<NoConvertToOptional>&);
-  CopyConvertFromOptional& operator=(const CopyConvertFromOptional&) = delete;
-  CopyConvertFromOptional& operator=(const NoConvertToOptional&);
-  CopyConvertFromOptional& operator=(
-      const absl::optional<NoConvertToOptional>&);
-};
-
-struct MoveConvert {
-  MoveConvert(NoConvertToOptional&&);
-  MoveConvert& operator=(const MoveConvert&) = delete;
-  MoveConvert& operator=(NoConvertToOptional&&);
-};
-
-struct MoveConvertFromOptional {
-  MoveConvertFromOptional(NoConvertToOptional&&);
-  MoveConvertFromOptional(absl::optional<NoConvertToOptional>&&);
-  MoveConvertFromOptional& operator=(const MoveConvertFromOptional&) = delete;
-  MoveConvertFromOptional& operator=(NoConvertToOptional&&);
-  MoveConvertFromOptional& operator=(absl::optional<NoConvertToOptional>&&);
-};
-
-// template <typename U = T> absl::optional<T>& operator=(U&& v);
-TEST(optionalTest, ValueAssignment) {
-  absl::optional<int> opt;
-  EXPECT_FALSE(opt);
-  opt = 42;
-  EXPECT_TRUE(opt);
-  EXPECT_EQ(42, opt.value());
-  opt = absl::nullopt;
-  EXPECT_FALSE(opt);
-  opt = 42;
-  EXPECT_TRUE(opt);
-  EXPECT_EQ(42, opt.value());
-  opt = 43;
-  EXPECT_TRUE(opt);
-  EXPECT_EQ(43, opt.value());
-  opt = {};  // this should clear optional
-  EXPECT_FALSE(opt);
-
-  opt = {44};
-  EXPECT_TRUE(opt);
-  EXPECT_EQ(44, opt.value());
-
-  // U = const NoConvertToOptional&
-  EXPECT_TRUE((std::is_assignable<absl::optional<CopyConvert>&,
-                                  const NoConvertToOptional&>::value));
-  // U = const absl::optional<NoConvertToOptional>&
-  EXPECT_TRUE((std::is_assignable<absl::optional<CopyConvertFromOptional>&,
-                                  const NoConvertToOptional&>::value));
-  // U = const NoConvertToOptional& triggers SFINAE because
-  // std::is_constructible_v<MoveConvert, const NoConvertToOptional&> is false
-  EXPECT_FALSE((std::is_assignable<absl::optional<MoveConvert>&,
-                                   const NoConvertToOptional&>::value));
-  // U = NoConvertToOptional
-  EXPECT_TRUE((std::is_assignable<absl::optional<MoveConvert>&,
-                                  NoConvertToOptional&&>::value));
-  // U = const NoConvertToOptional& triggers SFINAE because
-  // std::is_constructible_v<MoveConvertFromOptional, const
-  // NoConvertToOptional&> is false
-  EXPECT_FALSE((std::is_assignable<absl::optional<MoveConvertFromOptional>&,
-                                   const NoConvertToOptional&>::value));
-  // U = NoConvertToOptional
-  EXPECT_TRUE((std::is_assignable<absl::optional<MoveConvertFromOptional>&,
-                                  NoConvertToOptional&&>::value));
-  // U = const absl::optional<NoConvertToOptional>&
-  EXPECT_TRUE(
-      (std::is_assignable<absl::optional<CopyConvertFromOptional>&,
-                          const absl::optional<NoConvertToOptional>&>::value));
-  // U = absl::optional<NoConvertToOptional>
-  EXPECT_TRUE(
-      (std::is_assignable<absl::optional<MoveConvertFromOptional>&,
-                          absl::optional<NoConvertToOptional>&&>::value));
-}
-
-// template <typename U> absl::optional<T>& operator=(const absl::optional<U>&
-// rhs); template <typename U> absl::optional<T>& operator=(absl::optional<U>&&
-// rhs);
-TEST(optionalTest, ConvertingAssignment) {
-  absl::optional<int> opt_i;
-  absl::optional<char> opt_c('c');
-  opt_i = opt_c;
-  EXPECT_TRUE(opt_i);
-  EXPECT_EQ(*opt_c, *opt_i);
-  opt_i = absl::optional<char>();
-  EXPECT_FALSE(opt_i);
-  opt_i = absl::optional<char>('d');
-  EXPECT_TRUE(opt_i);
-  EXPECT_EQ('d', *opt_i);
-
-  absl::optional<std::string> opt_str;
-  absl::optional<const char*> opt_cstr("abc");
-  opt_str = opt_cstr;
-  EXPECT_TRUE(opt_str);
-  EXPECT_EQ(std::string("abc"), *opt_str);
-  opt_str = absl::optional<const char*>();
-  EXPECT_FALSE(opt_str);
-  opt_str = absl::optional<const char*>("def");
-  EXPECT_TRUE(opt_str);
-  EXPECT_EQ(std::string("def"), *opt_str);
-
-  // operator=(const absl::optional<U>&) with U = NoConvertToOptional
-  EXPECT_TRUE(
-      (std::is_assignable<absl::optional<CopyConvert>,
-                          const absl::optional<NoConvertToOptional>&>::value));
-  // operator=(const absl::optional<U>&) with U = NoConvertToOptional
-  // triggers SFINAE because
-  // std::is_constructible_v<MoveConvert, const NoConvertToOptional&> is false
-  EXPECT_FALSE(
-      (std::is_assignable<absl::optional<MoveConvert>&,
-                          const absl::optional<NoConvertToOptional>&>::value));
-  // operator=(absl::optional<U>&&) with U = NoConvertToOptional
-  EXPECT_TRUE(
-      (std::is_assignable<absl::optional<MoveConvert>&,
-                          absl::optional<NoConvertToOptional>&&>::value));
-  // operator=(const absl::optional<U>&) with U = NoConvertToOptional triggers
-  // SFINAE because std::is_constructible_v<MoveConvertFromOptional, const
-  // NoConvertToOptional&> is false. operator=(U&&) with U = const
-  // absl::optional<NoConverToOptional>& triggers SFINAE because
-  // std::is_constructible<MoveConvertFromOptional,
-  // absl::optional<NoConvertToOptional>&&> is true.
-  EXPECT_FALSE(
-      (std::is_assignable<absl::optional<MoveConvertFromOptional>&,
-                          const absl::optional<NoConvertToOptional>&>::value));
-}
-
-TEST(optionalTest, ResetAndHasValue) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-  absl::optional<Listenable> opt;
-  EXPECT_FALSE(opt);
-  EXPECT_FALSE(opt.has_value());
-  opt.emplace();
-  EXPECT_TRUE(opt);
-  EXPECT_TRUE(opt.has_value());
-  opt.reset();
-  EXPECT_FALSE(opt);
-  EXPECT_FALSE(opt.has_value());
-  EXPECT_EQ(1, listener.destruct);
-  opt.reset();
-  EXPECT_FALSE(opt);
-  EXPECT_FALSE(opt.has_value());
-
-  constexpr absl::optional<int> empty;
-  static_assert(!empty.has_value(), "");
-  constexpr absl::optional<int> nonempty(1);
-  static_assert(nonempty.has_value(), "");
-}
-
-TEST(optionalTest, Emplace) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-  absl::optional<Listenable> opt;
-  EXPECT_FALSE(opt);
-  opt.emplace(1);
-  EXPECT_TRUE(opt);
-  opt.emplace(1, 2);
-  EXPECT_EQ(1, listener.construct1);
-  EXPECT_EQ(1, listener.construct2);
-  EXPECT_EQ(1, listener.destruct);
-
-  absl::optional<std::string> o;
-  EXPECT_TRUE((std::is_same<std::string&, decltype(o.emplace("abc"))>::value));
-  std::string& ref = o.emplace("abc");
-  EXPECT_EQ(&ref, &o.value());
-}
-
-TEST(optionalTest, ListEmplace) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-  absl::optional<Listenable> opt;
-  EXPECT_FALSE(opt);
-  opt.emplace({1});
-  EXPECT_TRUE(opt);
-  opt.emplace({1, 2});
-  EXPECT_EQ(2, listener.listinit);
-  EXPECT_EQ(1, listener.destruct);
-
-  absl::optional<Listenable> o;
-  EXPECT_TRUE((std::is_same<Listenable&, decltype(o.emplace({1}))>::value));
-  Listenable& ref = o.emplace({1});
-  EXPECT_EQ(&ref, &o.value());
-}
-
-TEST(optionalTest, Swap) {
-  absl::optional<int> opt_empty, opt1 = 1, opt2 = 2;
-  EXPECT_FALSE(opt_empty);
-  EXPECT_TRUE(opt1);
-  EXPECT_EQ(1, opt1.value());
-  EXPECT_TRUE(opt2);
-  EXPECT_EQ(2, opt2.value());
-  swap(opt_empty, opt1);
-  EXPECT_FALSE(opt1);
-  EXPECT_TRUE(opt_empty);
-  EXPECT_EQ(1, opt_empty.value());
-  EXPECT_TRUE(opt2);
-  EXPECT_EQ(2, opt2.value());
-  swap(opt_empty, opt1);
-  EXPECT_FALSE(opt_empty);
-  EXPECT_TRUE(opt1);
-  EXPECT_EQ(1, opt1.value());
-  EXPECT_TRUE(opt2);
-  EXPECT_EQ(2, opt2.value());
-  swap(opt1, opt2);
-  EXPECT_FALSE(opt_empty);
-  EXPECT_TRUE(opt1);
-  EXPECT_EQ(2, opt1.value());
-  EXPECT_TRUE(opt2);
-  EXPECT_EQ(1, opt2.value());
-
-  EXPECT_TRUE(noexcept(opt1.swap(opt2)));
-  EXPECT_TRUE(noexcept(swap(opt1, opt2)));
-}
-
-template <int v>
-struct DeletedOpAddr {
-  int value = v;
-  constexpr DeletedOpAddr() = default;
-  constexpr const DeletedOpAddr<v>* operator&() const = delete;  // NOLINT
-  DeletedOpAddr<v>* operator&() = delete;                        // NOLINT
-};
-
-// The static_assert featuring a constexpr call to operator->() is commented out
-// to document the fact that the current implementation of absl::optional<T>
-// expects such usecases to be malformed and not compile.
-TEST(optionalTest, OperatorAddr) {
-  constexpr int v = -1;
-  {  // constexpr
-    constexpr absl::optional<DeletedOpAddr<v>> opt(absl::in_place_t{});
-    static_assert(opt.has_value(), "");
-    // static_assert(opt->value == v, "");
-    static_assert((*opt).value == v, "");
-  }
-  {  // non-constexpr
-    const absl::optional<DeletedOpAddr<v>> opt(absl::in_place_t{});
-    EXPECT_TRUE(opt.has_value());
-    EXPECT_TRUE(opt->value == v);
-    EXPECT_TRUE((*opt).value == v);
-  }
-}
-
-TEST(optionalTest, PointerStuff) {
-  absl::optional<std::string> opt(absl::in_place, "foo");
-  EXPECT_EQ("foo", *opt);
-  const auto& opt_const = opt;
-  EXPECT_EQ("foo", *opt_const);
-  EXPECT_EQ(opt->size(), 3);
-  EXPECT_EQ(opt_const->size(), 3);
-
-  constexpr absl::optional<ConstexprType> opt1(1);
-  static_assert((*opt1).x == ConstexprType::kCtorInt, "");
-}
-
-// gcc has a bug pre 4.9.1 where it doesn't do correct overload resolution
-// when overloads are const-qualified and *this is an raluve.
-// Skip that test to make the build green again when using the old compiler.
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59296 is fixed in 4.9.1.
-#if defined(__GNUC__) && !defined(__clang__)
-#define GCC_VERSION (__GNUC__ * 10000 \
-                     + __GNUC_MINOR__ * 100 \
-                     + __GNUC_PATCHLEVEL__)
-#if GCC_VERSION < 40901
-#define ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG
-#endif
-#endif
-
-// MSVC has a bug with "cv-qualifiers in class construction", fixed in 2017. See
-// https://docs.microsoft.com/en-us/cpp/cpp-conformance-improvements-2017#bug-fixes
-// The compiler some incorrectly ingores the cv-qualifier when generating a
-// class object via a constructor call. For example:
-//
-// class optional {
-//   constexpr T&& value() &&;
-//   constexpr const T&& value() const &&;
-// }
-//
-// using COI = const absl::optional<int>;
-// static_assert(2 == COI(2).value(), "");  // const &&
-//
-// This should invoke the "const &&" overload but since it ignores the const
-// qualifier it finds the "&&" overload the best candidate.
-#if defined(_MSC_VER) && _MSC_VER < 1910
-#define ABSL_SKIP_OVERLOAD_TEST_DUE_TO_MSVC_BUG
-#endif
-
-TEST(optionalTest, Value) {
-  using O = absl::optional<std::string>;
-  using CO = const absl::optional<std::string>;
-  using OC = absl::optional<const std::string>;
-  O lvalue(absl::in_place, "lvalue");
-  CO clvalue(absl::in_place, "clvalue");
-  OC lvalue_c(absl::in_place, "lvalue_c");
-  EXPECT_EQ("lvalue", lvalue.value());
-  EXPECT_EQ("clvalue", clvalue.value());
-  EXPECT_EQ("lvalue_c", lvalue_c.value());
-  EXPECT_EQ("xvalue", O(absl::in_place, "xvalue").value());
-  EXPECT_EQ("xvalue_c", OC(absl::in_place, "xvalue_c").value());
-#ifndef ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG
-  EXPECT_EQ("cxvalue", CO(absl::in_place, "cxvalue").value());
-#endif
-  EXPECT_EQ("&", TypeQuals(lvalue.value()));
-  EXPECT_EQ("c&", TypeQuals(clvalue.value()));
-  EXPECT_EQ("c&", TypeQuals(lvalue_c.value()));
-  EXPECT_EQ("&&", TypeQuals(O(absl::in_place, "xvalue").value()));
-#if !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_MSVC_BUG) && \
-    !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
-  EXPECT_EQ("c&&", TypeQuals(CO(absl::in_place, "cxvalue").value()));
-#endif
-  EXPECT_EQ("c&&", TypeQuals(OC(absl::in_place, "xvalue_c").value()));
-
-  // test on volatile type
-  using OV = absl::optional<volatile int>;
-  OV lvalue_v(absl::in_place, 42);
-  EXPECT_EQ(42, lvalue_v.value());
-  EXPECT_EQ(42, OV(42).value());
-  EXPECT_TRUE((std::is_same<volatile int&, decltype(lvalue_v.value())>::value));
-  EXPECT_TRUE((std::is_same<volatile int&&, decltype(OV(42).value())>::value));
-
-  // test exception throw on value()
-  absl::optional<int> empty;
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW((void)empty.value(), absl::bad_optional_access);
-#else
-  EXPECT_DEATH_IF_SUPPORTED((void)empty.value(), "Bad optional access");
-#endif
-
-  // test constexpr value()
-  constexpr absl::optional<int> o1(1);
-  static_assert(1 == o1.value(), "");  // const &
-#if !defined(_MSC_VER) && !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
-  using COI = const absl::optional<int>;
-  static_assert(2 == COI(2).value(), "");  // const &&
-#endif
-}
-
-TEST(optionalTest, DerefOperator) {
-  using O = absl::optional<std::string>;
-  using CO = const absl::optional<std::string>;
-  using OC = absl::optional<const std::string>;
-  O lvalue(absl::in_place, "lvalue");
-  CO clvalue(absl::in_place, "clvalue");
-  OC lvalue_c(absl::in_place, "lvalue_c");
-  EXPECT_EQ("lvalue", *lvalue);
-  EXPECT_EQ("clvalue", *clvalue);
-  EXPECT_EQ("lvalue_c", *lvalue_c);
-  EXPECT_EQ("xvalue", *O(absl::in_place, "xvalue"));
-  EXPECT_EQ("xvalue_c", *OC(absl::in_place, "xvalue_c"));
-#ifndef ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG
-  EXPECT_EQ("cxvalue", *CO(absl::in_place, "cxvalue"));
-#endif
-  EXPECT_EQ("&", TypeQuals(*lvalue));
-  EXPECT_EQ("c&", TypeQuals(*clvalue));
-  EXPECT_EQ("&&", TypeQuals(*O(absl::in_place, "xvalue")));
-#if !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_MSVC_BUG) && \
-    !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
-  EXPECT_EQ("c&&", TypeQuals(*CO(absl::in_place, "cxvalue")));
-#endif
-  EXPECT_EQ("c&&", TypeQuals(*OC(absl::in_place, "xvalue_c")));
-
-  // test on volatile type
-  using OV = absl::optional<volatile int>;
-  OV lvalue_v(absl::in_place, 42);
-  EXPECT_EQ(42, *lvalue_v);
-  EXPECT_EQ(42, *OV(42));
-  EXPECT_TRUE((std::is_same<volatile int&, decltype(*lvalue_v)>::value));
-  EXPECT_TRUE((std::is_same<volatile int&&, decltype(*OV(42))>::value));
-
-  constexpr absl::optional<int> opt1(1);
-  static_assert(*opt1 == 1, "");
-#if !defined(_MSC_VER) && !defined(ABSL_SKIP_OVERLOAD_TEST_DUE_TO_GCC_BUG)
-  using COI = const absl::optional<int>;
-  static_assert(*COI(2) == 2, "");
-#endif
-}
-
-TEST(optionalTest, ValueOr) {
-  absl::optional<double> opt_empty, opt_set = 1.2;
-  EXPECT_EQ(42.0, opt_empty.value_or(42));
-  EXPECT_EQ(1.2, opt_set.value_or(42));
-  EXPECT_EQ(42.0, absl::optional<double>().value_or(42));
-  EXPECT_EQ(1.2, absl::optional<double>(1.2).value_or(42));
-
-  constexpr absl::optional<double> copt_empty, copt_set = {1.2};
-  static_assert(42.0 == copt_empty.value_or(42), "");
-  static_assert(1.2 == copt_set.value_or(42), "");
-#ifndef ABSL_SKIP_OVERLOAD_TEST_DUE_TO_MSVC_BUG
-  using COD = const absl::optional<double>;
-  static_assert(42.0 == COD().value_or(42), "");
-  static_assert(1.2 == COD(1.2).value_or(42), "");
-#endif
-}
-
-// make_optional cannot be constexpr until C++17
-TEST(optionalTest, make_optional) {
-  auto opt_int = absl::make_optional(42);
-  EXPECT_TRUE((std::is_same<decltype(opt_int), absl::optional<int>>::value));
-  EXPECT_EQ(42, opt_int);
-
-  StructorListener listener;
-  Listenable::listener = &listener;
-
-  absl::optional<Listenable> opt0 = absl::make_optional<Listenable>();
-  EXPECT_EQ(1, listener.construct0);
-  absl::optional<Listenable> opt1 = absl::make_optional<Listenable>(1);
-  EXPECT_EQ(1, listener.construct1);
-  absl::optional<Listenable> opt2 = absl::make_optional<Listenable>(1, 2);
-  EXPECT_EQ(1, listener.construct2);
-  absl::optional<Listenable> opt3 = absl::make_optional<Listenable>({1});
-  absl::optional<Listenable> opt4 = absl::make_optional<Listenable>({1, 2});
-  EXPECT_EQ(2, listener.listinit);
-
-  // Constexpr tests on trivially copyable types
-  // optional<T> has trivial copy/move ctors when T is trivially copyable.
-  // For nontrivial types with constexpr constructors, we need copy elision in
-  // C++17 for make_optional to be constexpr.
-  {
-    constexpr absl::optional<int> c_opt = absl::make_optional(42);
-    static_assert(c_opt.value() == 42, "");
-  }
-  {
-    struct TrivialCopyable {
-      constexpr TrivialCopyable() : x(0) {}
-      constexpr explicit TrivialCopyable(int i) : x(i) {}
-      int x;
-    };
-
-    constexpr TrivialCopyable v;
-    constexpr absl::optional<TrivialCopyable> c_opt0 = absl::make_optional(v);
-    static_assert((*c_opt0).x == 0, "");
-    constexpr absl::optional<TrivialCopyable> c_opt1 =
-        absl::make_optional<TrivialCopyable>();
-    static_assert((*c_opt1).x == 0, "");
-    constexpr absl::optional<TrivialCopyable> c_opt2 =
-        absl::make_optional<TrivialCopyable>(42);
-    static_assert((*c_opt2).x == 42, "");
-  }
-}
-
-template <typename T, typename U>
-void optionalTest_Comparisons_EXPECT_LESS(T x, U y) {
-  EXPECT_FALSE(x == y);
-  EXPECT_TRUE(x != y);
-  EXPECT_TRUE(x < y);
-  EXPECT_FALSE(x > y);
-  EXPECT_TRUE(x <= y);
-  EXPECT_FALSE(x >= y);
-}
-
-template <typename T, typename U>
-void optionalTest_Comparisons_EXPECT_SAME(T x, U y) {
-  EXPECT_TRUE(x == y);
-  EXPECT_FALSE(x != y);
-  EXPECT_FALSE(x < y);
-  EXPECT_FALSE(x > y);
-  EXPECT_TRUE(x <= y);
-  EXPECT_TRUE(x >= y);
-}
-
-template <typename T, typename U>
-void optionalTest_Comparisons_EXPECT_GREATER(T x, U y) {
-  EXPECT_FALSE(x == y);
-  EXPECT_TRUE(x != y);
-  EXPECT_FALSE(x < y);
-  EXPECT_TRUE(x > y);
-  EXPECT_FALSE(x <= y);
-  EXPECT_TRUE(x >= y);
-}
-
-
-template <typename T, typename U, typename V>
-void TestComparisons() {
-  absl::optional<T> ae, a2{2}, a4{4};
-  absl::optional<U> be, b2{2}, b4{4};
-  V v3 = 3;
-
-  // LHS: absl::nullopt, ae, a2, v3, a4
-  // RHS: absl::nullopt, be, b2, v3, b4
-
-  // optionalTest_Comparisons_EXPECT_NOT_TO_WORK(absl::nullopt,absl::nullopt);
-  optionalTest_Comparisons_EXPECT_SAME(absl::nullopt, be);
-  optionalTest_Comparisons_EXPECT_LESS(absl::nullopt, b2);
-  // optionalTest_Comparisons_EXPECT_NOT_TO_WORK(absl::nullopt,v3);
-  optionalTest_Comparisons_EXPECT_LESS(absl::nullopt, b4);
-
-  optionalTest_Comparisons_EXPECT_SAME(ae, absl::nullopt);
-  optionalTest_Comparisons_EXPECT_SAME(ae, be);
-  optionalTest_Comparisons_EXPECT_LESS(ae, b2);
-  optionalTest_Comparisons_EXPECT_LESS(ae, v3);
-  optionalTest_Comparisons_EXPECT_LESS(ae, b4);
-
-  optionalTest_Comparisons_EXPECT_GREATER(a2, absl::nullopt);
-  optionalTest_Comparisons_EXPECT_GREATER(a2, be);
-  optionalTest_Comparisons_EXPECT_SAME(a2, b2);
-  optionalTest_Comparisons_EXPECT_LESS(a2, v3);
-  optionalTest_Comparisons_EXPECT_LESS(a2, b4);
-
-  // optionalTest_Comparisons_EXPECT_NOT_TO_WORK(v3,absl::nullopt);
-  optionalTest_Comparisons_EXPECT_GREATER(v3, be);
-  optionalTest_Comparisons_EXPECT_GREATER(v3, b2);
-  optionalTest_Comparisons_EXPECT_SAME(v3, v3);
-  optionalTest_Comparisons_EXPECT_LESS(v3, b4);
-
-  optionalTest_Comparisons_EXPECT_GREATER(a4, absl::nullopt);
-  optionalTest_Comparisons_EXPECT_GREATER(a4, be);
-  optionalTest_Comparisons_EXPECT_GREATER(a4, b2);
-  optionalTest_Comparisons_EXPECT_GREATER(a4, v3);
-  optionalTest_Comparisons_EXPECT_SAME(a4, b4);
-}
-
-struct Int1 {
-  Int1() = default;
-  Int1(int i) : i(i) {}  // NOLINT(runtime/explicit)
-  int i;
-};
-
-struct Int2 {
-  Int2() = default;
-  Int2(int i) : i(i) {}  // NOLINT(runtime/explicit)
-  int i;
-};
-
-// comparison between Int1 and Int2
-constexpr bool operator==(const Int1& lhs, const Int2& rhs) {
-  return lhs.i == rhs.i;
-}
-constexpr bool operator!=(const Int1& lhs, const Int2& rhs) {
-  return !(lhs == rhs);
-}
-constexpr bool operator<(const Int1& lhs, const Int2& rhs) {
-  return lhs.i < rhs.i;
-}
-constexpr bool operator<=(const Int1& lhs, const Int2& rhs) {
-  return lhs < rhs || lhs == rhs;
-}
-constexpr bool operator>(const Int1& lhs, const Int2& rhs) {
-  return !(lhs <= rhs);
-}
-constexpr bool operator>=(const Int1& lhs, const Int2& rhs) {
-  return !(lhs < rhs);
-}
-
-TEST(optionalTest, Comparisons) {
-  TestComparisons<int, int, int>();
-  TestComparisons<const int, int, int>();
-  TestComparisons<Int1, int, int>();
-  TestComparisons<int, Int2, int>();
-  TestComparisons<Int1, Int2, int>();
-
-  // compare absl::optional<std::string> with const char*
-  absl::optional<std::string> opt_str = "abc";
-  const char* cstr = "abc";
-  EXPECT_TRUE(opt_str == cstr);
-  // compare absl::optional<std::string> with absl::optional<const char*>
-  absl::optional<const char*> opt_cstr = cstr;
-  EXPECT_TRUE(opt_str == opt_cstr);
-  // compare absl::optional<std::string> with absl::optional<absl::string_view>
-  absl::optional<absl::string_view> e1;
-  absl::optional<std::string> e2;
-  EXPECT_TRUE(e1 == e2);
-}
-
-
-TEST(optionalTest, SwapRegression) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-
-  {
-    absl::optional<Listenable> a;
-    absl::optional<Listenable> b(absl::in_place);
-    a.swap(b);
-  }
-
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(1, listener.move);
-  EXPECT_EQ(2, listener.destruct);
-
-  {
-    absl::optional<Listenable> a(absl::in_place);
-    absl::optional<Listenable> b;
-    a.swap(b);
-  }
-
-  EXPECT_EQ(2, listener.construct0);
-  EXPECT_EQ(2, listener.move);
-  EXPECT_EQ(4, listener.destruct);
-}
-
-TEST(optionalTest, BigStringLeakCheck) {
-  constexpr size_t n = 1 << 16;
-
-  using OS = absl::optional<std::string>;
-
-  OS a;
-  OS b = absl::nullopt;
-  OS c = std::string(n, 'c');
-  std::string sd(n, 'd');
-  OS d = sd;
-  OS e(absl::in_place, n, 'e');
-  OS f;
-  f.emplace(n, 'f');
-
-  OS ca(a);
-  OS cb(b);
-  OS cc(c);
-  OS cd(d);
-  OS ce(e);
-
-  OS oa;
-  OS ob = absl::nullopt;
-  OS oc = std::string(n, 'c');
-  std::string sod(n, 'd');
-  OS od = sod;
-  OS oe(absl::in_place, n, 'e');
-  OS of;
-  of.emplace(n, 'f');
-
-  OS ma(std::move(oa));
-  OS mb(std::move(ob));
-  OS mc(std::move(oc));
-  OS md(std::move(od));
-  OS me(std::move(oe));
-  OS mf(std::move(of));
-
-  OS aa1;
-  OS ab1 = absl::nullopt;
-  OS ac1 = std::string(n, 'c');
-  std::string sad1(n, 'd');
-  OS ad1 = sad1;
-  OS ae1(absl::in_place, n, 'e');
-  OS af1;
-  af1.emplace(n, 'f');
-
-  OS aa2;
-  OS ab2 = absl::nullopt;
-  OS ac2 = std::string(n, 'c');
-  std::string sad2(n, 'd');
-  OS ad2 = sad2;
-  OS ae2(absl::in_place, n, 'e');
-  OS af2;
-  af2.emplace(n, 'f');
-
-  aa1 = af2;
-  ab1 = ae2;
-  ac1 = ad2;
-  ad1 = ac2;
-  ae1 = ab2;
-  af1 = aa2;
-
-  OS aa3;
-  OS ab3 = absl::nullopt;
-  OS ac3 = std::string(n, 'c');
-  std::string sad3(n, 'd');
-  OS ad3 = sad3;
-  OS ae3(absl::in_place, n, 'e');
-  OS af3;
-  af3.emplace(n, 'f');
-
-  aa3 = absl::nullopt;
-  ab3 = absl::nullopt;
-  ac3 = absl::nullopt;
-  ad3 = absl::nullopt;
-  ae3 = absl::nullopt;
-  af3 = absl::nullopt;
-
-  OS aa4;
-  OS ab4 = absl::nullopt;
-  OS ac4 = std::string(n, 'c');
-  std::string sad4(n, 'd');
-  OS ad4 = sad4;
-  OS ae4(absl::in_place, n, 'e');
-  OS af4;
-  af4.emplace(n, 'f');
-
-  aa4 = OS(absl::in_place, n, 'a');
-  ab4 = OS(absl::in_place, n, 'b');
-  ac4 = OS(absl::in_place, n, 'c');
-  ad4 = OS(absl::in_place, n, 'd');
-  ae4 = OS(absl::in_place, n, 'e');
-  af4 = OS(absl::in_place, n, 'f');
-
-  OS aa5;
-  OS ab5 = absl::nullopt;
-  OS ac5 = std::string(n, 'c');
-  std::string sad5(n, 'd');
-  OS ad5 = sad5;
-  OS ae5(absl::in_place, n, 'e');
-  OS af5;
-  af5.emplace(n, 'f');
-
-  std::string saa5(n, 'a');
-  std::string sab5(n, 'a');
-  std::string sac5(n, 'a');
-  std::string sad52(n, 'a');
-  std::string sae5(n, 'a');
-  std::string saf5(n, 'a');
-
-  aa5 = saa5;
-  ab5 = sab5;
-  ac5 = sac5;
-  ad5 = sad52;
-  ae5 = sae5;
-  af5 = saf5;
-
-  OS aa6;
-  OS ab6 = absl::nullopt;
-  OS ac6 = std::string(n, 'c');
-  std::string sad6(n, 'd');
-  OS ad6 = sad6;
-  OS ae6(absl::in_place, n, 'e');
-  OS af6;
-  af6.emplace(n, 'f');
-
-  aa6 = std::string(n, 'a');
-  ab6 = std::string(n, 'b');
-  ac6 = std::string(n, 'c');
-  ad6 = std::string(n, 'd');
-  ae6 = std::string(n, 'e');
-  af6 = std::string(n, 'f');
-
-  OS aa7;
-  OS ab7 = absl::nullopt;
-  OS ac7 = std::string(n, 'c');
-  std::string sad7(n, 'd');
-  OS ad7 = sad7;
-  OS ae7(absl::in_place, n, 'e');
-  OS af7;
-  af7.emplace(n, 'f');
-
-  aa7.emplace(n, 'A');
-  ab7.emplace(n, 'B');
-  ac7.emplace(n, 'C');
-  ad7.emplace(n, 'D');
-  ae7.emplace(n, 'E');
-  af7.emplace(n, 'F');
-}
-
-TEST(optionalTest, MoveAssignRegression) {
-  StructorListener listener;
-  Listenable::listener = &listener;
-
-  {
-    absl::optional<Listenable> a;
-    Listenable b;
-    a = std::move(b);
-  }
-
-  EXPECT_EQ(1, listener.construct0);
-  EXPECT_EQ(1, listener.move);
-  EXPECT_EQ(2, listener.destruct);
-}
-
-TEST(optionalTest, ValueType) {
-  EXPECT_TRUE((std::is_same<absl::optional<int>::value_type, int>::value));
-  EXPECT_TRUE((std::is_same<absl::optional<std::string>::value_type,
-                            std::string>::value));
-  EXPECT_FALSE(
-      (std::is_same<absl::optional<int>::value_type, absl::nullopt_t>::value));
-}
-
-template <typename T>
-struct is_hash_enabled_for {
-  template <typename U, typename = decltype(std::hash<U>()(std::declval<U>()))>
-  static std::true_type test(int);
-
-  template <typename U>
-  static std::false_type test(...);
-
-  static constexpr bool value = decltype(test<T>(0))::value;
-};
-
-TEST(optionalTest, Hash) {
-  std::hash<absl::optional<int>> hash;
-  std::set<size_t> hashcodes;
-  hashcodes.insert(hash(absl::nullopt));
-  for (int i = 0; i < 100; ++i) {
-    hashcodes.insert(hash(i));
-  }
-  EXPECT_GT(hashcodes.size(), 90);
-
-  static_assert(is_hash_enabled_for<absl::optional<int>>::value, "");
-  static_assert(is_hash_enabled_for<absl::optional<Hashable>>::value, "");
-  static_assert(
-      absl::type_traits_internal::IsHashable<absl::optional<int>>::value, "");
-  static_assert(
-      absl::type_traits_internal::IsHashable<absl::optional<Hashable>>::value,
-      "");
-  absl::type_traits_internal::AssertHashEnabled<absl::optional<int>>();
-  absl::type_traits_internal::AssertHashEnabled<absl::optional<Hashable>>();
-
-#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-  static_assert(!is_hash_enabled_for<absl::optional<NonHashable>>::value, "");
-  static_assert(!absl::type_traits_internal::IsHashable<
-                    absl::optional<NonHashable>>::value,
-                "");
-#endif
-
-  // libstdc++ std::optional is missing remove_const_t, i.e. it's using
-  // std::hash<T> rather than std::hash<std::remove_const_t<T>>.
-  // Reference: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82262
-#ifndef __GLIBCXX__
-  static_assert(is_hash_enabled_for<absl::optional<const int>>::value, "");
-  static_assert(is_hash_enabled_for<absl::optional<const Hashable>>::value, "");
-  std::hash<absl::optional<const int>> c_hash;
-  for (int i = 0; i < 100; ++i) {
-    EXPECT_EQ(hash(i), c_hash(i));
-  }
-#endif
-}
-
-struct MoveMeNoThrow {
-  MoveMeNoThrow() : x(0) {}
-  [[noreturn]] MoveMeNoThrow(const MoveMeNoThrow& other) : x(other.x) {
-    ABSL_RAW_LOG(FATAL, "Should not be called.");
-    abort();
-  }
-  MoveMeNoThrow(MoveMeNoThrow&& other) noexcept : x(other.x) {}
-  int x;
-};
-
-struct MoveMeThrow {
-  MoveMeThrow() : x(0) {}
-  MoveMeThrow(const MoveMeThrow& other) : x(other.x) {}
-  MoveMeThrow(MoveMeThrow&& other) : x(other.x) {}
-  int x;
-};
-
-TEST(optionalTest, NoExcept) {
-  static_assert(
-      std::is_nothrow_move_constructible<absl::optional<MoveMeNoThrow>>::value,
-      "");
-#ifndef ABSL_USES_STD_OPTIONAL
-  static_assert(absl::default_allocator_is_nothrow::value ==
-                    std::is_nothrow_move_constructible<
-                        absl::optional<MoveMeThrow>>::value,
-                "");
-#endif
-  std::vector<absl::optional<MoveMeNoThrow>> v;
-  for (int i = 0; i < 10; ++i) v.emplace_back();
-}
-
-struct AnyLike {
-  AnyLike(AnyLike&&) = default;
-  AnyLike(const AnyLike&) = default;
-
-  template <typename ValueType,
-            typename T = typename std::decay<ValueType>::type,
-            typename std::enable_if<
-                !absl::disjunction<
-                    std::is_same<AnyLike, T>,
-                    absl::negation<std::is_copy_constructible<T>>>::value,
-                int>::type = 0>
-  AnyLike(ValueType&&) {}  // NOLINT(runtime/explicit)
-
-  AnyLike& operator=(AnyLike&&) = default;
-  AnyLike& operator=(const AnyLike&) = default;
-
-  template <typename ValueType,
-            typename T = typename std::decay<ValueType>::type>
-  typename std::enable_if<
-      absl::conjunction<absl::negation<std::is_same<AnyLike, T>>,
-                        std::is_copy_constructible<T>>::value,
-      AnyLike&>::type
-  operator=(ValueType&& /* rhs */) {
-    return *this;
-  }
-};
-
-TEST(optionalTest, ConstructionConstraints) {
-  EXPECT_TRUE((std::is_constructible<AnyLike, absl::optional<AnyLike>>::value));
-
-  EXPECT_TRUE(
-      (std::is_constructible<AnyLike, const absl::optional<AnyLike>&>::value));
-
-  EXPECT_TRUE((std::is_constructible<absl::optional<AnyLike>, AnyLike>::value));
-  EXPECT_TRUE(
-      (std::is_constructible<absl::optional<AnyLike>, const AnyLike&>::value));
-
-  EXPECT_TRUE((std::is_convertible<absl::optional<AnyLike>, AnyLike>::value));
-
-  EXPECT_TRUE(
-      (std::is_convertible<const absl::optional<AnyLike>&, AnyLike>::value));
-
-  EXPECT_TRUE((std::is_convertible<AnyLike, absl::optional<AnyLike>>::value));
-  EXPECT_TRUE(
-      (std::is_convertible<const AnyLike&, absl::optional<AnyLike>>::value));
-
-  EXPECT_TRUE(std::is_move_constructible<absl::optional<AnyLike>>::value);
-  EXPECT_TRUE(std::is_copy_constructible<absl::optional<AnyLike>>::value);
-}
-
-TEST(optionalTest, AssignmentConstraints) {
-  EXPECT_TRUE((std::is_assignable<AnyLike&, absl::optional<AnyLike>>::value));
-  EXPECT_TRUE(
-      (std::is_assignable<AnyLike&, const absl::optional<AnyLike>&>::value));
-  EXPECT_TRUE((std::is_assignable<absl::optional<AnyLike>&, AnyLike>::value));
-  EXPECT_TRUE(
-      (std::is_assignable<absl::optional<AnyLike>&, const AnyLike&>::value));
-  EXPECT_TRUE(std::is_move_assignable<absl::optional<AnyLike>>::value);
-  EXPECT_TRUE(absl::is_copy_assignable<absl::optional<AnyLike>>::value);
-}
-
-#if !defined(__EMSCRIPTEN__)
-struct NestedClassBug {
-  struct Inner {
-    bool dummy = false;
-  };
-  absl::optional<Inner> value;
-};
-
-TEST(optionalTest, InPlaceTSFINAEBug) {
-  NestedClassBug b;
-  ((void)b);
-  using Inner = NestedClassBug::Inner;
-
-  EXPECT_TRUE((std::is_default_constructible<Inner>::value));
-  EXPECT_TRUE((std::is_constructible<Inner>::value));
-  EXPECT_TRUE(
-      (std::is_constructible<absl::optional<Inner>, absl::in_place_t>::value));
-
-  absl::optional<Inner> o(absl::in_place);
-  EXPECT_TRUE(o.has_value());
-  o.emplace();
-  EXPECT_TRUE(o.has_value());
-}
-#endif  // !defined(__EMSCRIPTEN__)
-
-}  // namespace
-
-#endif  // #if !defined(ABSL_USES_STD_OPTIONAL)
diff --git a/third_party/abseil/absl/types/span.h b/third_party/abseil/absl/types/span.h
deleted file mode 100644
index 95fe792..0000000
--- a/third_party/abseil/absl/types/span.h
+++ /dev/null
@@ -1,726 +0,0 @@
-//
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// span.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines a `Span<T>` type for holding a reference to existing
-// array data. The `Span` object, much like the `absl::string_view` object,
-// does not own such data itself, and the data being referenced by the span must
-// outlive the span itself. Unlike `view` type references, a span can hold a
-// reference to mutable data (and can mutate it for underlying types of
-// non-const T.) A span provides a lightweight way to pass a reference to such
-// data.
-//
-// Additionally, this header file defines `MakeSpan()` and `MakeConstSpan()`
-// factory functions, for clearly creating spans of type `Span<T>` or read-only
-// `Span<const T>` when such types may be difficult to identify due to issues
-// with implicit conversion.
-//
-// The C++20 draft standard includes a `std::span` type. As of June 2020, the
-// differences between `absl::Span` and `std::span` are:
-//    * `absl::Span` has `operator==` (which is likely a design bug,
-//       per https://abseil.io/blog/20180531-regular-types)
-//    * `absl::Span` has the factory functions `MakeSpan()` and
-//      `MakeConstSpan()`
-//    * bounds-checked access to `absl::Span` is accomplished with `at()`
-//    * `absl::Span` has compiler-provided move and copy constructors and
-//      assignment. This is due to them being specified as `constexpr`, but that
-//      implies const in C++11.
-//    * `absl::Span` has no `element_type` typedef
-//    * A read-only `absl::Span<const T>` can be implicitly constructed from an
-//      initializer list.
-//    * `absl::Span` has no `bytes()`, `size_bytes()`, `as_bytes()`, or
-//      `as_mutable_bytes()` methods
-//    * `absl::Span` has no static extent template parameter, nor constructors
-//      which exist only because of the static extent parameter.
-//    * `absl::Span` has an explicit mutable-reference constructor
-//
-// For more information, see the class comments below.
-#ifndef ABSL_TYPES_SPAN_H_
-#define ABSL_TYPES_SPAN_H_
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <initializer_list>
-#include <iterator>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/base/macros.h"
-#include "absl/base/optimization.h"
-#include "absl/base/port.h"    // TODO(strel): remove this include
-#include "absl/meta/type_traits.h"
-#include "absl/types/internal/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-//------------------------------------------------------------------------------
-// Span
-//------------------------------------------------------------------------------
-//
-// A `Span` is an "array reference" type for holding a reference of contiguous
-// array data; the `Span` object does not and cannot own such data itself. A
-// span provides an easy way to provide overloads for anything operating on
-// contiguous sequences without needing to manage pointers and array lengths
-// manually.
-
-// A span is conceptually a pointer (ptr) and a length (size) into an already
-// existing array of contiguous memory; the array it represents references the
-// elements "ptr[0] .. ptr[size-1]". Passing a properly-constructed `Span`
-// instead of raw pointers avoids many issues related to index out of bounds
-// errors.
-//
-// Spans may also be constructed from containers holding contiguous sequences.
-// Such containers must supply `data()` and `size() const` methods (e.g
-// `std::vector<T>`, `absl::InlinedVector<T, N>`). All implicit conversions to
-// `absl::Span` from such containers will create spans of type `const T`;
-// spans which can mutate their values (of type `T`) must use explicit
-// constructors.
-//
-// A `Span<T>` is somewhat analogous to an `absl::string_view`, but for an array
-// of elements of type `T`, and unlike an `absl::string_view`, a span can hold a
-// reference to mutable data. A user of `Span` must ensure that the data being
-// pointed to outlives the `Span` itself.
-//
-// You can construct a `Span<T>` in several ways:
-//
-//   * Explicitly from a reference to a container type
-//   * Explicitly from a pointer and size
-//   * Implicitly from a container type (but only for spans of type `const T`)
-//   * Using the `MakeSpan()` or `MakeConstSpan()` factory functions.
-//
-// Examples:
-//
-//   // Construct a Span explicitly from a container:
-//   std::vector<int> v = {1, 2, 3, 4, 5};
-//   auto span = absl::Span<const int>(v);
-//
-//   // Construct a Span explicitly from a C-style array:
-//   int a[5] =  {1, 2, 3, 4, 5};
-//   auto span = absl::Span<const int>(a);
-//
-//   // Construct a Span implicitly from a container
-//   void MyRoutine(absl::Span<const int> a) {
-//     ...
-//   }
-//   std::vector v = {1,2,3,4,5};
-//   MyRoutine(v)                     // convert to Span<const T>
-//
-// Note that `Span` objects, in addition to requiring that the memory they
-// point to remains alive, must also ensure that such memory does not get
-// reallocated. Therefore, to avoid undefined behavior, containers with
-// associated spans should not invoke operations that may reallocate memory
-// (such as resizing) or invalidate iterators into the container.
-//
-// One common use for a `Span` is when passing arguments to a routine that can
-// accept a variety of array types (e.g. a `std::vector`, `absl::InlinedVector`,
-// a C-style array, etc.). Instead of creating overloads for each case, you
-// can simply specify a `Span` as the argument to such a routine.
-//
-// Example:
-//
-//   void MyRoutine(absl::Span<const int> a) {
-//     ...
-//   }
-//
-//   std::vector v = {1,2,3,4,5};
-//   MyRoutine(v);
-//
-//   absl::InlinedVector<int, 4> my_inline_vector;
-//   MyRoutine(my_inline_vector);
-//
-//   // Explicit constructor from pointer,size
-//   int* my_array = new int[10];
-//   MyRoutine(absl::Span<const int>(my_array, 10));
-template <typename T>
-class Span {
- private:
-  // Used to determine whether a Span can be constructed from a container of
-  // type C.
-  template <typename C>
-  using EnableIfConvertibleFrom =
-      typename std::enable_if<span_internal::HasData<T, C>::value &&
-                              span_internal::HasSize<C>::value>::type;
-
-  // Used to SFINAE-enable a function when the slice elements are const.
-  template <typename U>
-  using EnableIfConstView =
-      typename std::enable_if<std::is_const<T>::value, U>::type;
-
-  // Used to SFINAE-enable a function when the slice elements are mutable.
-  template <typename U>
-  using EnableIfMutableView =
-      typename std::enable_if<!std::is_const<T>::value, U>::type;
-
- public:
-  using value_type = absl::remove_cv_t<T>;
-  using pointer = T*;
-  using const_pointer = const T*;
-  using reference = T&;
-  using const_reference = const T&;
-  using iterator = pointer;
-  using const_iterator = const_pointer;
-  using reverse_iterator = std::reverse_iterator<iterator>;
-  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
-  using size_type = size_t;
-  using difference_type = ptrdiff_t;
-
-  static const size_type npos = ~(size_type(0));
-
-  constexpr Span() noexcept : Span(nullptr, 0) {}
-  constexpr Span(pointer array, size_type length) noexcept
-      : ptr_(array), len_(length) {}
-
-  // Implicit conversion constructors
-  template <size_t N>
-  constexpr Span(T (&a)[N]) noexcept  // NOLINT(runtime/explicit)
-      : Span(a, N) {}
-
-  // Explicit reference constructor for a mutable `Span<T>` type. Can be
-  // replaced with MakeSpan() to infer the type parameter.
-  template <typename V, typename = EnableIfConvertibleFrom<V>,
-            typename = EnableIfMutableView<V>>
-  explicit Span(V& v) noexcept  // NOLINT(runtime/references)
-      : Span(span_internal::GetData(v), v.size()) {}
-
-  // Implicit reference constructor for a read-only `Span<const T>` type
-  template <typename V, typename = EnableIfConvertibleFrom<V>,
-            typename = EnableIfConstView<V>>
-  constexpr Span(const V& v) noexcept  // NOLINT(runtime/explicit)
-      : Span(span_internal::GetData(v), v.size()) {}
-
-  // Implicit constructor from an initializer list, making it possible to pass a
-  // brace-enclosed initializer list to a function expecting a `Span`. Such
-  // spans constructed from an initializer list must be of type `Span<const T>`.
-  //
-  //   void Process(absl::Span<const int> x);
-  //   Process({1, 2, 3});
-  //
-  // Note that as always the array referenced by the span must outlive the span.
-  // Since an initializer list constructor acts as if it is fed a temporary
-  // array (cf. C++ standard [dcl.init.list]/5), it's safe to use this
-  // constructor only when the `std::initializer_list` itself outlives the span.
-  // In order to meet this requirement it's sufficient to ensure that neither
-  // the span nor a copy of it is used outside of the expression in which it's
-  // created:
-  //
-  //   // Assume that this function uses the array directly, not retaining any
-  //   // copy of the span or pointer to any of its elements.
-  //   void Process(absl::Span<const int> ints);
-  //
-  //   // Okay: the std::initializer_list<int> will reference a temporary array
-  //   // that isn't destroyed until after the call to Process returns.
-  //   Process({ 17, 19 });
-  //
-  //   // Not okay: the storage used by the std::initializer_list<int> is not
-  //   // allowed to be referenced after the first line.
-  //   absl::Span<const int> ints = { 17, 19 };
-  //   Process(ints);
-  //
-  //   // Not okay for the same reason as above: even when the elements of the
-  //   // initializer list expression are not temporaries the underlying array
-  //   // is, so the initializer list must still outlive the span.
-  //   const int foo = 17;
-  //   absl::Span<const int> ints = { foo };
-  //   Process(ints);
-  //
-  template <typename LazyT = T,
-            typename = EnableIfConstView<LazyT>>
-  Span(
-      std::initializer_list<value_type> v) noexcept  // NOLINT(runtime/explicit)
-      : Span(v.begin(), v.size()) {}
-
-  // Accessors
-
-  // Span::data()
-  //
-  // Returns a pointer to the span's underlying array of data (which is held
-  // outside the span).
-  constexpr pointer data() const noexcept { return ptr_; }
-
-  // Span::size()
-  //
-  // Returns the size of this span.
-  constexpr size_type size() const noexcept { return len_; }
-
-  // Span::length()
-  //
-  // Returns the length (size) of this span.
-  constexpr size_type length() const noexcept { return size(); }
-
-  // Span::empty()
-  //
-  // Returns a boolean indicating whether or not this span is considered empty.
-  constexpr bool empty() const noexcept { return size() == 0; }
-
-  // Span::operator[]
-  //
-  // Returns a reference to the i'th element of this span.
-  constexpr reference operator[](size_type i) const noexcept {
-    // MSVC 2015 accepts this as constexpr, but not ptr_[i]
-    return ABSL_HARDENING_ASSERT(i < size()), *(data() + i);
-  }
-
-  // Span::at()
-  //
-  // Returns a reference to the i'th element of this span.
-  constexpr reference at(size_type i) const {
-    return ABSL_PREDICT_TRUE(i < size())  //
-               ? *(data() + i)
-               : (base_internal::ThrowStdOutOfRange(
-                      "Span::at failed bounds check"),
-                  *(data() + i));
-  }
-
-  // Span::front()
-  //
-  // Returns a reference to the first element of this span. The span must not
-  // be empty.
-  constexpr reference front() const noexcept {
-    return ABSL_HARDENING_ASSERT(size() > 0), *data();
-  }
-
-  // Span::back()
-  //
-  // Returns a reference to the last element of this span. The span must not
-  // be empty.
-  constexpr reference back() const noexcept {
-    return ABSL_HARDENING_ASSERT(size() > 0), *(data() + size() - 1);
-  }
-
-  // Span::begin()
-  //
-  // Returns an iterator pointing to the first element of this span, or `end()`
-  // if the span is empty.
-  constexpr iterator begin() const noexcept { return data(); }
-
-  // Span::cbegin()
-  //
-  // Returns a const iterator pointing to the first element of this span, or
-  // `end()` if the span is empty.
-  constexpr const_iterator cbegin() const noexcept { return begin(); }
-
-  // Span::end()
-  //
-  // Returns an iterator pointing just beyond the last element at the
-  // end of this span. This iterator acts as a placeholder; attempting to
-  // access it results in undefined behavior.
-  constexpr iterator end() const noexcept { return data() + size(); }
-
-  // Span::cend()
-  //
-  // Returns a const iterator pointing just beyond the last element at the
-  // end of this span. This iterator acts as a placeholder; attempting to
-  // access it results in undefined behavior.
-  constexpr const_iterator cend() const noexcept { return end(); }
-
-  // Span::rbegin()
-  //
-  // Returns a reverse iterator pointing to the last element at the end of this
-  // span, or `rend()` if the span is empty.
-  constexpr reverse_iterator rbegin() const noexcept {
-    return reverse_iterator(end());
-  }
-
-  // Span::crbegin()
-  //
-  // Returns a const reverse iterator pointing to the last element at the end of
-  // this span, or `crend()` if the span is empty.
-  constexpr const_reverse_iterator crbegin() const noexcept { return rbegin(); }
-
-  // Span::rend()
-  //
-  // Returns a reverse iterator pointing just before the first element
-  // at the beginning of this span. This pointer acts as a placeholder;
-  // attempting to access its element results in undefined behavior.
-  constexpr reverse_iterator rend() const noexcept {
-    return reverse_iterator(begin());
-  }
-
-  // Span::crend()
-  //
-  // Returns a reverse const iterator pointing just before the first element
-  // at the beginning of this span. This pointer acts as a placeholder;
-  // attempting to access its element results in undefined behavior.
-  constexpr const_reverse_iterator crend() const noexcept { return rend(); }
-
-  // Span mutations
-
-  // Span::remove_prefix()
-  //
-  // Removes the first `n` elements from the span.
-  void remove_prefix(size_type n) noexcept {
-    ABSL_HARDENING_ASSERT(size() >= n);
-    ptr_ += n;
-    len_ -= n;
-  }
-
-  // Span::remove_suffix()
-  //
-  // Removes the last `n` elements from the span.
-  void remove_suffix(size_type n) noexcept {
-    ABSL_HARDENING_ASSERT(size() >= n);
-    len_ -= n;
-  }
-
-  // Span::subspan()
-  //
-  // Returns a `Span` starting at element `pos` and of length `len`. Both `pos`
-  // and `len` are of type `size_type` and thus non-negative. Parameter `pos`
-  // must be <= size(). Any `len` value that points past the end of the span
-  // will be trimmed to at most size() - `pos`. A default `len` value of `npos`
-  // ensures the returned subspan continues until the end of the span.
-  //
-  // Examples:
-  //
-  //   std::vector<int> vec = {10, 11, 12, 13};
-  //   absl::MakeSpan(vec).subspan(1, 2);  // {11, 12}
-  //   absl::MakeSpan(vec).subspan(2, 8);  // {12, 13}
-  //   absl::MakeSpan(vec).subspan(1);     // {11, 12, 13}
-  //   absl::MakeSpan(vec).subspan(4);     // {}
-  //   absl::MakeSpan(vec).subspan(5);     // throws std::out_of_range
-  constexpr Span subspan(size_type pos = 0, size_type len = npos) const {
-    return (pos <= size())
-               ? Span(data() + pos, span_internal::Min(size() - pos, len))
-               : (base_internal::ThrowStdOutOfRange("pos > size()"), Span());
-  }
-
-  // Span::first()
-  //
-  // Returns a `Span` containing first `len` elements. Parameter `len` is of
-  // type `size_type` and thus non-negative. `len` value must be <= size().
-  //
-  // Examples:
-  //
-  //   std::vector<int> vec = {10, 11, 12, 13};
-  //   absl::MakeSpan(vec).first(1);  // {10}
-  //   absl::MakeSpan(vec).first(3);  // {10, 11, 12}
-  //   absl::MakeSpan(vec).first(5);  // throws std::out_of_range
-  constexpr Span first(size_type len) const {
-    return (len <= size())
-               ? Span(data(), len)
-               : (base_internal::ThrowStdOutOfRange("len > size()"), Span());
-  }
-
-  // Span::last()
-  //
-  // Returns a `Span` containing last `len` elements. Parameter `len` is of
-  // type `size_type` and thus non-negative. `len` value must be <= size().
-  //
-  // Examples:
-  //
-  //   std::vector<int> vec = {10, 11, 12, 13};
-  //   absl::MakeSpan(vec).last(1);  // {13}
-  //   absl::MakeSpan(vec).last(3);  // {11, 12, 13}
-  //   absl::MakeSpan(vec).last(5);  // throws std::out_of_range
-  constexpr Span last(size_type len) const {
-    return (len <= size())
-               ? Span(size() - len + data(), len)
-               : (base_internal::ThrowStdOutOfRange("len > size()"), Span());
-  }
-
-  // Support for absl::Hash.
-  template <typename H>
-  friend H AbslHashValue(H h, Span v) {
-    return H::combine(H::combine_contiguous(std::move(h), v.data(), v.size()),
-                      v.size());
-  }
-
- private:
-  pointer ptr_;
-  size_type len_;
-};
-
-template <typename T>
-const typename Span<T>::size_type Span<T>::npos;
-
-// Span relationals
-
-// Equality is compared element-by-element, while ordering is lexicographical.
-// We provide three overloads for each operator to cover any combination on the
-// left or right hand side of mutable Span<T>, read-only Span<const T>, and
-// convertible-to-read-only Span<T>.
-// TODO(zhangxy): Due to MSVC overload resolution bug with partial ordering
-// template functions, 5 overloads per operator is needed as a workaround. We
-// should update them to 3 overloads per operator using non-deduced context like
-// string_view, i.e.
-// - (Span<T>, Span<T>)
-// - (Span<T>, non_deduced<Span<const T>>)
-// - (non_deduced<Span<const T>>, Span<T>)
-
-// operator==
-template <typename T>
-bool operator==(Span<T> a, Span<T> b) {
-  return span_internal::EqualImpl<Span, const T>(a, b);
-}
-template <typename T>
-bool operator==(Span<const T> a, Span<T> b) {
-  return span_internal::EqualImpl<Span, const T>(a, b);
-}
-template <typename T>
-bool operator==(Span<T> a, Span<const T> b) {
-  return span_internal::EqualImpl<Span, const T>(a, b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator==(const U& a, Span<T> b) {
-  return span_internal::EqualImpl<Span, const T>(a, b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator==(Span<T> a, const U& b) {
-  return span_internal::EqualImpl<Span, const T>(a, b);
-}
-
-// operator!=
-template <typename T>
-bool operator!=(Span<T> a, Span<T> b) {
-  return !(a == b);
-}
-template <typename T>
-bool operator!=(Span<const T> a, Span<T> b) {
-  return !(a == b);
-}
-template <typename T>
-bool operator!=(Span<T> a, Span<const T> b) {
-  return !(a == b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator!=(const U& a, Span<T> b) {
-  return !(a == b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator!=(Span<T> a, const U& b) {
-  return !(a == b);
-}
-
-// operator<
-template <typename T>
-bool operator<(Span<T> a, Span<T> b) {
-  return span_internal::LessThanImpl<Span, const T>(a, b);
-}
-template <typename T>
-bool operator<(Span<const T> a, Span<T> b) {
-  return span_internal::LessThanImpl<Span, const T>(a, b);
-}
-template <typename T>
-bool operator<(Span<T> a, Span<const T> b) {
-  return span_internal::LessThanImpl<Span, const T>(a, b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator<(const U& a, Span<T> b) {
-  return span_internal::LessThanImpl<Span, const T>(a, b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator<(Span<T> a, const U& b) {
-  return span_internal::LessThanImpl<Span, const T>(a, b);
-}
-
-// operator>
-template <typename T>
-bool operator>(Span<T> a, Span<T> b) {
-  return b < a;
-}
-template <typename T>
-bool operator>(Span<const T> a, Span<T> b) {
-  return b < a;
-}
-template <typename T>
-bool operator>(Span<T> a, Span<const T> b) {
-  return b < a;
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator>(const U& a, Span<T> b) {
-  return b < a;
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator>(Span<T> a, const U& b) {
-  return b < a;
-}
-
-// operator<=
-template <typename T>
-bool operator<=(Span<T> a, Span<T> b) {
-  return !(b < a);
-}
-template <typename T>
-bool operator<=(Span<const T> a, Span<T> b) {
-  return !(b < a);
-}
-template <typename T>
-bool operator<=(Span<T> a, Span<const T> b) {
-  return !(b < a);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator<=(const U& a, Span<T> b) {
-  return !(b < a);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator<=(Span<T> a, const U& b) {
-  return !(b < a);
-}
-
-// operator>=
-template <typename T>
-bool operator>=(Span<T> a, Span<T> b) {
-  return !(a < b);
-}
-template <typename T>
-bool operator>=(Span<const T> a, Span<T> b) {
-  return !(a < b);
-}
-template <typename T>
-bool operator>=(Span<T> a, Span<const T> b) {
-  return !(a < b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator>=(const U& a, Span<T> b) {
-  return !(a < b);
-}
-template <
-    typename T, typename U,
-    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
-bool operator>=(Span<T> a, const U& b) {
-  return !(a < b);
-}
-
-// MakeSpan()
-//
-// Constructs a mutable `Span<T>`, deducing `T` automatically from either a
-// container or pointer+size.
-//
-// Because a read-only `Span<const T>` is implicitly constructed from container
-// types regardless of whether the container itself is a const container,
-// constructing mutable spans of type `Span<T>` from containers requires
-// explicit constructors. The container-accepting version of `MakeSpan()`
-// deduces the type of `T` by the constness of the pointer received from the
-// container's `data()` member. Similarly, the pointer-accepting version returns
-// a `Span<const T>` if `T` is `const`, and a `Span<T>` otherwise.
-//
-// Examples:
-//
-//   void MyRoutine(absl::Span<MyComplicatedType> a) {
-//     ...
-//   };
-//   // my_vector is a container of non-const types
-//   std::vector<MyComplicatedType> my_vector;
-//
-//   // Constructing a Span implicitly attempts to create a Span of type
-//   // `Span<const T>`
-//   MyRoutine(my_vector);                // error, type mismatch
-//
-//   // Explicitly constructing the Span is verbose
-//   MyRoutine(absl::Span<MyComplicatedType>(my_vector));
-//
-//   // Use MakeSpan() to make an absl::Span<T>
-//   MyRoutine(absl::MakeSpan(my_vector));
-//
-//   // Construct a span from an array ptr+size
-//   absl::Span<T> my_span() {
-//     return absl::MakeSpan(&array[0], num_elements_);
-//   }
-//
-template <int&... ExplicitArgumentBarrier, typename T>
-constexpr Span<T> MakeSpan(T* ptr, size_t size) noexcept {
-  return Span<T>(ptr, size);
-}
-
-template <int&... ExplicitArgumentBarrier, typename T>
-Span<T> MakeSpan(T* begin, T* end) noexcept {
-  return ABSL_HARDENING_ASSERT(begin <= end), Span<T>(begin, end - begin);
-}
-
-template <int&... ExplicitArgumentBarrier, typename C>
-constexpr auto MakeSpan(C& c) noexcept  // NOLINT(runtime/references)
-    -> decltype(absl::MakeSpan(span_internal::GetData(c), c.size())) {
-  return MakeSpan(span_internal::GetData(c), c.size());
-}
-
-template <int&... ExplicitArgumentBarrier, typename T, size_t N>
-constexpr Span<T> MakeSpan(T (&array)[N]) noexcept {
-  return Span<T>(array, N);
-}
-
-// MakeConstSpan()
-//
-// Constructs a `Span<const T>` as with `MakeSpan`, deducing `T` automatically,
-// but always returning a `Span<const T>`.
-//
-// Examples:
-//
-//   void ProcessInts(absl::Span<const int> some_ints);
-//
-//   // Call with a pointer and size.
-//   int array[3] = { 0, 0, 0 };
-//   ProcessInts(absl::MakeConstSpan(&array[0], 3));
-//
-//   // Call with a [begin, end) pair.
-//   ProcessInts(absl::MakeConstSpan(&array[0], &array[3]));
-//
-//   // Call directly with an array.
-//   ProcessInts(absl::MakeConstSpan(array));
-//
-//   // Call with a contiguous container.
-//   std::vector<int> some_ints = ...;
-//   ProcessInts(absl::MakeConstSpan(some_ints));
-//   ProcessInts(absl::MakeConstSpan(std::vector<int>{ 0, 0, 0 }));
-//
-template <int&... ExplicitArgumentBarrier, typename T>
-constexpr Span<const T> MakeConstSpan(T* ptr, size_t size) noexcept {
-  return Span<const T>(ptr, size);
-}
-
-template <int&... ExplicitArgumentBarrier, typename T>
-Span<const T> MakeConstSpan(T* begin, T* end) noexcept {
-  return ABSL_HARDENING_ASSERT(begin <= end), Span<const T>(begin, end - begin);
-}
-
-template <int&... ExplicitArgumentBarrier, typename C>
-constexpr auto MakeConstSpan(const C& c) noexcept -> decltype(MakeSpan(c)) {
-  return MakeSpan(c);
-}
-
-template <int&... ExplicitArgumentBarrier, typename T, size_t N>
-constexpr Span<const T> MakeConstSpan(const T (&array)[N]) noexcept {
-  return Span<const T>(array, N);
-}
-ABSL_NAMESPACE_END
-}  // namespace absl
-#endif  // ABSL_TYPES_SPAN_H_
diff --git a/third_party/abseil/absl/types/span_test.cc b/third_party/abseil/absl/types/span_test.cc
deleted file mode 100644
index 2584339..0000000
--- a/third_party/abseil/absl/types/span_test.cc
+++ /dev/null
@@ -1,846 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/span.h"
-
-#include <array>
-#include <initializer_list>
-#include <numeric>
-#include <stdexcept>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/base/internal/exception_testing.h"
-#include "absl/base/options.h"
-#include "absl/container/fixed_array.h"
-#include "absl/container/inlined_vector.h"
-#include "absl/hash/hash_testing.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-MATCHER_P(DataIs, data,
-          absl::StrCat("data() ", negation ? "isn't " : "is ",
-                       testing::PrintToString(data))) {
-  return arg.data() == data;
-}
-
-template <typename T>
-auto SpanIs(T data, size_t size)
-    -> decltype(testing::AllOf(DataIs(data), testing::SizeIs(size))) {
-  return testing::AllOf(DataIs(data), testing::SizeIs(size));
-}
-
-template <typename Container>
-auto SpanIs(const Container& c) -> decltype(SpanIs(c.data(), c.size())) {
-  return SpanIs(c.data(), c.size());
-}
-
-std::vector<int> MakeRamp(int len, int offset = 0) {
-  std::vector<int> v(len);
-  std::iota(v.begin(), v.end(), offset);
-  return v;
-}
-
-TEST(IntSpan, EmptyCtors) {
-  absl::Span<int> s;
-  EXPECT_THAT(s, SpanIs(nullptr, 0));
-}
-
-TEST(IntSpan, PtrLenCtor) {
-  int a[] = {1, 2, 3};
-  absl::Span<int> s(&a[0], 2);
-  EXPECT_THAT(s, SpanIs(a, 2));
-}
-
-TEST(IntSpan, ArrayCtor) {
-  int a[] = {1, 2, 3};
-  absl::Span<int> s(a);
-  EXPECT_THAT(s, SpanIs(a, 3));
-
-  EXPECT_TRUE((std::is_constructible<absl::Span<const int>, int[3]>::value));
-  EXPECT_TRUE(
-      (std::is_constructible<absl::Span<const int>, const int[3]>::value));
-  EXPECT_FALSE((std::is_constructible<absl::Span<int>, const int[3]>::value));
-  EXPECT_TRUE((std::is_convertible<int[3], absl::Span<const int>>::value));
-  EXPECT_TRUE(
-      (std::is_convertible<const int[3], absl::Span<const int>>::value));
-}
-
-template <typename T>
-void TakesGenericSpan(absl::Span<T>) {}
-
-TEST(IntSpan, ContainerCtor) {
-  std::vector<int> empty;
-  absl::Span<int> s_empty(empty);
-  EXPECT_THAT(s_empty, SpanIs(empty));
-
-  std::vector<int> filled{1, 2, 3};
-  absl::Span<int> s_filled(filled);
-  EXPECT_THAT(s_filled, SpanIs(filled));
-
-  absl::Span<int> s_from_span(filled);
-  EXPECT_THAT(s_from_span, SpanIs(s_filled));
-
-  absl::Span<const int> const_filled = filled;
-  EXPECT_THAT(const_filled, SpanIs(filled));
-
-  absl::Span<const int> const_from_span = s_filled;
-  EXPECT_THAT(const_from_span, SpanIs(s_filled));
-
-  EXPECT_TRUE(
-      (std::is_convertible<std::vector<int>&, absl::Span<const int>>::value));
-  EXPECT_TRUE(
-      (std::is_convertible<absl::Span<int>&, absl::Span<const int>>::value));
-
-  TakesGenericSpan(absl::Span<int>(filled));
-}
-
-// A struct supplying shallow data() const.
-struct ContainerWithShallowConstData {
-  std::vector<int> storage;
-  int* data() const { return const_cast<int*>(storage.data()); }
-  int size() const { return storage.size(); }
-};
-
-TEST(IntSpan, ShallowConstness) {
-  const ContainerWithShallowConstData c{MakeRamp(20)};
-  absl::Span<int> s(
-      c);  // We should be able to do this even though data() is const.
-  s[0] = -1;
-  EXPECT_EQ(c.storage[0], -1);
-}
-
-TEST(CharSpan, StringCtor) {
-  std::string empty = "";
-  absl::Span<char> s_empty(empty);
-  EXPECT_THAT(s_empty, SpanIs(empty));
-
-  std::string abc = "abc";
-  absl::Span<char> s_abc(abc);
-  EXPECT_THAT(s_abc, SpanIs(abc));
-
-  absl::Span<const char> s_const_abc = abc;
-  EXPECT_THAT(s_const_abc, SpanIs(abc));
-
-  EXPECT_FALSE((std::is_constructible<absl::Span<int>, std::string>::value));
-  EXPECT_FALSE(
-      (std::is_constructible<absl::Span<const int>, std::string>::value));
-  EXPECT_TRUE(
-      (std::is_convertible<std::string, absl::Span<const char>>::value));
-}
-
-TEST(IntSpan, FromConstPointer) {
-  EXPECT_TRUE((std::is_constructible<absl::Span<const int* const>,
-                                     std::vector<int*>>::value));
-  EXPECT_TRUE((std::is_constructible<absl::Span<const int* const>,
-                                     std::vector<const int*>>::value));
-  EXPECT_FALSE((
-      std::is_constructible<absl::Span<const int*>, std::vector<int*>>::value));
-  EXPECT_FALSE((
-      std::is_constructible<absl::Span<int*>, std::vector<const int*>>::value));
-}
-
-struct TypeWithMisleadingData {
-  int& data() { return i; }
-  int size() { return 1; }
-  int i;
-};
-
-struct TypeWithMisleadingSize {
-  int* data() { return &i; }
-  const char* size() { return "1"; }
-  int i;
-};
-
-TEST(IntSpan, EvilTypes) {
-  EXPECT_FALSE(
-      (std::is_constructible<absl::Span<int>, TypeWithMisleadingData&>::value));
-  EXPECT_FALSE(
-      (std::is_constructible<absl::Span<int>, TypeWithMisleadingSize&>::value));
-}
-
-struct Base {
-  int* data() { return &i; }
-  int size() { return 1; }
-  int i;
-};
-struct Derived : Base {};
-
-TEST(IntSpan, SpanOfDerived) {
-  EXPECT_TRUE((std::is_constructible<absl::Span<int>, Base&>::value));
-  EXPECT_TRUE((std::is_constructible<absl::Span<int>, Derived&>::value));
-  EXPECT_FALSE(
-      (std::is_constructible<absl::Span<Base>, std::vector<Derived>>::value));
-}
-
-void TestInitializerList(absl::Span<const int> s, const std::vector<int>& v) {
-  EXPECT_TRUE(absl::equal(s.begin(), s.end(), v.begin(), v.end()));
-}
-
-TEST(ConstIntSpan, InitializerListConversion) {
-  TestInitializerList({}, {});
-  TestInitializerList({1}, {1});
-  TestInitializerList({1, 2, 3}, {1, 2, 3});
-
-  EXPECT_FALSE((std::is_constructible<absl::Span<int>,
-                                      std::initializer_list<int>>::value));
-  EXPECT_FALSE((
-      std::is_convertible<absl::Span<int>, std::initializer_list<int>>::value));
-}
-
-TEST(IntSpan, Data) {
-  int i;
-  absl::Span<int> s(&i, 1);
-  EXPECT_EQ(&i, s.data());
-}
-
-TEST(IntSpan, SizeLengthEmpty) {
-  absl::Span<int> empty;
-  EXPECT_EQ(empty.size(), 0);
-  EXPECT_TRUE(empty.empty());
-  EXPECT_EQ(empty.size(), empty.length());
-
-  auto v = MakeRamp(10);
-  absl::Span<int> s(v);
-  EXPECT_EQ(s.size(), 10);
-  EXPECT_FALSE(s.empty());
-  EXPECT_EQ(s.size(), s.length());
-}
-
-TEST(IntSpan, ElementAccess) {
-  auto v = MakeRamp(10);
-  absl::Span<int> s(v);
-  for (int i = 0; i < s.size(); ++i) {
-    EXPECT_EQ(s[i], s.at(i));
-  }
-
-  EXPECT_EQ(s.front(), s[0]);
-  EXPECT_EQ(s.back(), s[9]);
-
-#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
-  EXPECT_DEATH_IF_SUPPORTED(s[-1], "");
-  EXPECT_DEATH_IF_SUPPORTED(s[10], "");
-#endif
-}
-
-TEST(IntSpan, AtThrows) {
-  auto v = MakeRamp(10);
-  absl::Span<int> s(v);
-
-  EXPECT_EQ(s.at(9), 9);
-  ABSL_BASE_INTERNAL_EXPECT_FAIL(s.at(10), std::out_of_range,
-                                 "failed bounds check");
-}
-
-TEST(IntSpan, RemovePrefixAndSuffix) {
-  auto v = MakeRamp(20, 1);
-  absl::Span<int> s(v);
-  EXPECT_EQ(s.size(), 20);
-
-  s.remove_suffix(0);
-  s.remove_prefix(0);
-  EXPECT_EQ(s.size(), 20);
-
-  s.remove_prefix(1);
-  EXPECT_EQ(s.size(), 19);
-  EXPECT_EQ(s[0], 2);
-
-  s.remove_suffix(1);
-  EXPECT_EQ(s.size(), 18);
-  EXPECT_EQ(s.back(), 19);
-
-  s.remove_prefix(7);
-  EXPECT_EQ(s.size(), 11);
-  EXPECT_EQ(s[0], 9);
-
-  s.remove_suffix(11);
-  EXPECT_EQ(s.size(), 0);
-
-  EXPECT_EQ(v, MakeRamp(20, 1));
-
-#if !defined(NDEBUG) || ABSL_OPTION_HARDENED
-  absl::Span<int> prefix_death(v);
-  EXPECT_DEATH_IF_SUPPORTED(prefix_death.remove_prefix(21), "");
-  absl::Span<int> suffix_death(v);
-  EXPECT_DEATH_IF_SUPPORTED(suffix_death.remove_suffix(21), "");
-#endif
-}
-
-TEST(IntSpan, Subspan) {
-  std::vector<int> empty;
-  EXPECT_EQ(absl::MakeSpan(empty).subspan(), empty);
-  EXPECT_THAT(absl::MakeSpan(empty).subspan(0, 0), SpanIs(empty));
-  EXPECT_THAT(absl::MakeSpan(empty).subspan(0, absl::Span<const int>::npos),
-              SpanIs(empty));
-
-  auto ramp = MakeRamp(10);
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(), SpanIs(ramp));
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(0, 10), SpanIs(ramp));
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(0, absl::Span<const int>::npos),
-              SpanIs(ramp));
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(0, 3), SpanIs(ramp.data(), 3));
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(5, absl::Span<const int>::npos),
-              SpanIs(ramp.data() + 5, 5));
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(3, 3), SpanIs(ramp.data() + 3, 3));
-  EXPECT_THAT(absl::MakeSpan(ramp).subspan(10, 5), SpanIs(ramp.data() + 10, 0));
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW(absl::MakeSpan(ramp).subspan(11, 5), std::out_of_range);
-#else
-  EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(ramp).subspan(11, 5), "");
-#endif
-}
-
-TEST(IntSpan, First) {
-  std::vector<int> empty;
-  EXPECT_THAT(absl::MakeSpan(empty).first(0), SpanIs(empty));
-
-  auto ramp = MakeRamp(10);
-  EXPECT_THAT(absl::MakeSpan(ramp).first(0), SpanIs(ramp.data(), 0));
-  EXPECT_THAT(absl::MakeSpan(ramp).first(10), SpanIs(ramp));
-  EXPECT_THAT(absl::MakeSpan(ramp).first(3), SpanIs(ramp.data(), 3));
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW(absl::MakeSpan(ramp).first(11), std::out_of_range);
-#else
-  EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(ramp).first(11), "");
-#endif
-}
-
-TEST(IntSpan, Last) {
-  std::vector<int> empty;
-  EXPECT_THAT(absl::MakeSpan(empty).last(0), SpanIs(empty));
-
-  auto ramp = MakeRamp(10);
-  EXPECT_THAT(absl::MakeSpan(ramp).last(0), SpanIs(ramp.data() + 10, 0));
-  EXPECT_THAT(absl::MakeSpan(ramp).last(10), SpanIs(ramp));
-  EXPECT_THAT(absl::MakeSpan(ramp).last(3), SpanIs(ramp.data() + 7, 3));
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW(absl::MakeSpan(ramp).last(11), std::out_of_range);
-#else
-  EXPECT_DEATH_IF_SUPPORTED(absl::MakeSpan(ramp).last(11), "");
-#endif
-}
-
-TEST(IntSpan, MakeSpanPtrLength) {
-  std::vector<int> empty;
-  auto s_empty = absl::MakeSpan(empty.data(), empty.size());
-  EXPECT_THAT(s_empty, SpanIs(empty));
-
-  std::array<int, 3> a{{1, 2, 3}};
-  auto s = absl::MakeSpan(a.data(), a.size());
-  EXPECT_THAT(s, SpanIs(a));
-
-  EXPECT_THAT(absl::MakeConstSpan(empty.data(), empty.size()), SpanIs(s_empty));
-  EXPECT_THAT(absl::MakeConstSpan(a.data(), a.size()), SpanIs(s));
-}
-
-TEST(IntSpan, MakeSpanTwoPtrs) {
-  std::vector<int> empty;
-  auto s_empty = absl::MakeSpan(empty.data(), empty.data());
-  EXPECT_THAT(s_empty, SpanIs(empty));
-
-  std::vector<int> v{1, 2, 3};
-  auto s = absl::MakeSpan(v.data(), v.data() + 1);
-  EXPECT_THAT(s, SpanIs(v.data(), 1));
-
-  EXPECT_THAT(absl::MakeConstSpan(empty.data(), empty.data()), SpanIs(s_empty));
-  EXPECT_THAT(absl::MakeConstSpan(v.data(), v.data() + 1), SpanIs(s));
-}
-
-TEST(IntSpan, MakeSpanContainer) {
-  std::vector<int> empty;
-  auto s_empty = absl::MakeSpan(empty);
-  EXPECT_THAT(s_empty, SpanIs(empty));
-
-  std::vector<int> v{1, 2, 3};
-  auto s = absl::MakeSpan(v);
-  EXPECT_THAT(s, SpanIs(v));
-
-  EXPECT_THAT(absl::MakeConstSpan(empty), SpanIs(s_empty));
-  EXPECT_THAT(absl::MakeConstSpan(v), SpanIs(s));
-
-  EXPECT_THAT(absl::MakeSpan(s), SpanIs(s));
-  EXPECT_THAT(absl::MakeConstSpan(s), SpanIs(s));
-}
-
-TEST(CharSpan, MakeSpanString) {
-  std::string empty = "";
-  auto s_empty = absl::MakeSpan(empty);
-  EXPECT_THAT(s_empty, SpanIs(empty));
-
-  std::string str = "abc";
-  auto s_str = absl::MakeSpan(str);
-  EXPECT_THAT(s_str, SpanIs(str));
-
-  EXPECT_THAT(absl::MakeConstSpan(empty), SpanIs(s_empty));
-  EXPECT_THAT(absl::MakeConstSpan(str), SpanIs(s_str));
-}
-
-TEST(IntSpan, MakeSpanArray) {
-  int a[] = {1, 2, 3};
-  auto s = absl::MakeSpan(a);
-  EXPECT_THAT(s, SpanIs(a, 3));
-
-  const int ca[] = {1, 2, 3};
-  auto s_ca = absl::MakeSpan(ca);
-  EXPECT_THAT(s_ca, SpanIs(ca, 3));
-
-  EXPECT_THAT(absl::MakeConstSpan(a), SpanIs(s));
-  EXPECT_THAT(absl::MakeConstSpan(ca), SpanIs(s_ca));
-}
-
-// Compile-asserts that the argument has the expected decayed type.
-template <typename Expected, typename T>
-void CheckType(const T& /* value */) {
-  testing::StaticAssertTypeEq<Expected, T>();
-}
-
-TEST(IntSpan, MakeSpanTypes) {
-  std::vector<int> vec;
-  const std::vector<int> cvec;
-  int a[1];
-  const int ca[] = {1};
-  int* ip = a;
-  const int* cip = ca;
-  std::string s = "";
-  const std::string cs = "";
-  CheckType<absl::Span<int>>(absl::MakeSpan(vec));
-  CheckType<absl::Span<const int>>(absl::MakeSpan(cvec));
-  CheckType<absl::Span<int>>(absl::MakeSpan(ip, ip + 1));
-  CheckType<absl::Span<int>>(absl::MakeSpan(ip, 1));
-  CheckType<absl::Span<const int>>(absl::MakeSpan(cip, cip + 1));
-  CheckType<absl::Span<const int>>(absl::MakeSpan(cip, 1));
-  CheckType<absl::Span<int>>(absl::MakeSpan(a));
-  CheckType<absl::Span<int>>(absl::MakeSpan(a, a + 1));
-  CheckType<absl::Span<int>>(absl::MakeSpan(a, 1));
-  CheckType<absl::Span<const int>>(absl::MakeSpan(ca));
-  CheckType<absl::Span<const int>>(absl::MakeSpan(ca, ca + 1));
-  CheckType<absl::Span<const int>>(absl::MakeSpan(ca, 1));
-  CheckType<absl::Span<char>>(absl::MakeSpan(s));
-  CheckType<absl::Span<const char>>(absl::MakeSpan(cs));
-}
-
-TEST(ConstIntSpan, MakeConstSpanTypes) {
-  std::vector<int> vec;
-  const std::vector<int> cvec;
-  int array[1];
-  const int carray[] = {0};
-  int* ptr = array;
-  const int* cptr = carray;
-  std::string s = "";
-  std::string cs = "";
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(vec));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(cvec));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(ptr, ptr + 1));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(ptr, 1));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(cptr, cptr + 1));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(cptr, 1));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(array));
-  CheckType<absl::Span<const int>>(absl::MakeConstSpan(carray));
-  CheckType<absl::Span<const char>>(absl::MakeConstSpan(s));
-  CheckType<absl::Span<const char>>(absl::MakeConstSpan(cs));
-}
-
-TEST(IntSpan, Equality) {
-  const int arr1[] = {1, 2, 3, 4, 5};
-  int arr2[] = {1, 2, 3, 4, 5};
-  std::vector<int> vec1(std::begin(arr1), std::end(arr1));
-  std::vector<int> vec2 = vec1;
-  std::vector<int> other_vec = {2, 4, 6, 8, 10};
-  // These two slices are from different vectors, but have the same size and
-  // have the same elements (right now).  They should compare equal. Test both
-  // == and !=.
-  const absl::Span<const int> from1 = vec1;
-  const absl::Span<const int> from2 = vec2;
-  EXPECT_EQ(from1, from1);
-  EXPECT_FALSE(from1 != from1);
-  EXPECT_EQ(from1, from2);
-  EXPECT_FALSE(from1 != from2);
-
-  // These two slices have different underlying vector values. They should be
-  // considered not equal. Test both == and !=.
-  const absl::Span<const int> from_other = other_vec;
-  EXPECT_NE(from1, from_other);
-  EXPECT_FALSE(from1 == from_other);
-
-  // Comparison between a vector and its slice should be equal. And vice-versa.
-  // This ensures implicit conversion to Span works on both sides of ==.
-  EXPECT_EQ(vec1, from1);
-  EXPECT_FALSE(vec1 != from1);
-  EXPECT_EQ(from1, vec1);
-  EXPECT_FALSE(from1 != vec1);
-
-  // This verifies that absl::Span<T> can be compared freely with
-  // absl::Span<const T>.
-  const absl::Span<int> mutable_from1(vec1);
-  const absl::Span<int> mutable_from2(vec2);
-  EXPECT_EQ(from1, mutable_from1);
-  EXPECT_EQ(mutable_from1, from1);
-  EXPECT_EQ(mutable_from1, mutable_from2);
-  EXPECT_EQ(mutable_from2, mutable_from1);
-
-  // Comparison between a vector and its slice should be equal for mutable
-  // Spans as well.
-  EXPECT_EQ(vec1, mutable_from1);
-  EXPECT_FALSE(vec1 != mutable_from1);
-  EXPECT_EQ(mutable_from1, vec1);
-  EXPECT_FALSE(mutable_from1 != vec1);
-
-  // Comparison between convertible-to-Span-of-const and Span-of-mutable. Arrays
-  // are used because they're the only value type which converts to a
-  // Span-of-mutable. EXPECT_TRUE is used instead of EXPECT_EQ to avoid
-  // array-to-pointer decay.
-  EXPECT_TRUE(arr1 == mutable_from1);
-  EXPECT_FALSE(arr1 != mutable_from1);
-  EXPECT_TRUE(mutable_from1 == arr1);
-  EXPECT_FALSE(mutable_from1 != arr1);
-
-  // Comparison between convertible-to-Span-of-mutable and Span-of-const
-  EXPECT_TRUE(arr2 == from1);
-  EXPECT_FALSE(arr2 != from1);
-  EXPECT_TRUE(from1 == arr2);
-  EXPECT_FALSE(from1 != arr2);
-
-  // With a different size, the array slices should not be equal.
-  EXPECT_NE(from1, absl::Span<const int>(from1).subspan(0, from1.size() - 1));
-
-  // With different contents, the array slices should not be equal.
-  ++vec2.back();
-  EXPECT_NE(from1, from2);
-}
-
-class IntSpanOrderComparisonTest : public testing::Test {
- public:
-  IntSpanOrderComparisonTest()
-      : arr_before_{1, 2, 3},
-        arr_after_{1, 2, 4},
-        carr_after_{1, 2, 4},
-        vec_before_(std::begin(arr_before_), std::end(arr_before_)),
-        vec_after_(std::begin(arr_after_), std::end(arr_after_)),
-        before_(vec_before_),
-        after_(vec_after_),
-        cbefore_(vec_before_),
-        cafter_(vec_after_) {}
-
- protected:
-  int arr_before_[3], arr_after_[3];
-  const int carr_after_[3];
-  std::vector<int> vec_before_, vec_after_;
-  absl::Span<int> before_, after_;
-  absl::Span<const int> cbefore_, cafter_;
-};
-
-TEST_F(IntSpanOrderComparisonTest, CompareSpans) {
-  EXPECT_TRUE(cbefore_ < cafter_);
-  EXPECT_TRUE(cbefore_ <= cafter_);
-  EXPECT_TRUE(cafter_ > cbefore_);
-  EXPECT_TRUE(cafter_ >= cbefore_);
-
-  EXPECT_FALSE(cbefore_ > cafter_);
-  EXPECT_FALSE(cafter_ < cbefore_);
-
-  EXPECT_TRUE(before_ < after_);
-  EXPECT_TRUE(before_ <= after_);
-  EXPECT_TRUE(after_ > before_);
-  EXPECT_TRUE(after_ >= before_);
-
-  EXPECT_FALSE(before_ > after_);
-  EXPECT_FALSE(after_ < before_);
-
-  EXPECT_TRUE(cbefore_ < after_);
-  EXPECT_TRUE(cbefore_ <= after_);
-  EXPECT_TRUE(after_ > cbefore_);
-  EXPECT_TRUE(after_ >= cbefore_);
-
-  EXPECT_FALSE(cbefore_ > after_);
-  EXPECT_FALSE(after_ < cbefore_);
-}
-
-TEST_F(IntSpanOrderComparisonTest, SpanOfConstAndContainer) {
-  EXPECT_TRUE(cbefore_ < vec_after_);
-  EXPECT_TRUE(cbefore_ <= vec_after_);
-  EXPECT_TRUE(vec_after_ > cbefore_);
-  EXPECT_TRUE(vec_after_ >= cbefore_);
-
-  EXPECT_FALSE(cbefore_ > vec_after_);
-  EXPECT_FALSE(vec_after_ < cbefore_);
-
-  EXPECT_TRUE(arr_before_ < cafter_);
-  EXPECT_TRUE(arr_before_ <= cafter_);
-  EXPECT_TRUE(cafter_ > arr_before_);
-  EXPECT_TRUE(cafter_ >= arr_before_);
-
-  EXPECT_FALSE(arr_before_ > cafter_);
-  EXPECT_FALSE(cafter_ < arr_before_);
-}
-
-TEST_F(IntSpanOrderComparisonTest, SpanOfMutableAndContainer) {
-  EXPECT_TRUE(vec_before_ < after_);
-  EXPECT_TRUE(vec_before_ <= after_);
-  EXPECT_TRUE(after_ > vec_before_);
-  EXPECT_TRUE(after_ >= vec_before_);
-
-  EXPECT_FALSE(vec_before_ > after_);
-  EXPECT_FALSE(after_ < vec_before_);
-
-  EXPECT_TRUE(before_ < carr_after_);
-  EXPECT_TRUE(before_ <= carr_after_);
-  EXPECT_TRUE(carr_after_ > before_);
-  EXPECT_TRUE(carr_after_ >= before_);
-
-  EXPECT_FALSE(before_ > carr_after_);
-  EXPECT_FALSE(carr_after_ < before_);
-}
-
-TEST_F(IntSpanOrderComparisonTest, EqualSpans) {
-  EXPECT_FALSE(before_ < before_);
-  EXPECT_TRUE(before_ <= before_);
-  EXPECT_FALSE(before_ > before_);
-  EXPECT_TRUE(before_ >= before_);
-}
-
-TEST_F(IntSpanOrderComparisonTest, Subspans) {
-  auto subspan = before_.subspan(0, 1);
-  EXPECT_TRUE(subspan < before_);
-  EXPECT_TRUE(subspan <= before_);
-  EXPECT_TRUE(before_ > subspan);
-  EXPECT_TRUE(before_ >= subspan);
-
-  EXPECT_FALSE(subspan > before_);
-  EXPECT_FALSE(before_ < subspan);
-}
-
-TEST_F(IntSpanOrderComparisonTest, EmptySpans) {
-  absl::Span<int> empty;
-  EXPECT_FALSE(empty < empty);
-  EXPECT_TRUE(empty <= empty);
-  EXPECT_FALSE(empty > empty);
-  EXPECT_TRUE(empty >= empty);
-
-  EXPECT_TRUE(empty < before_);
-  EXPECT_TRUE(empty <= before_);
-  EXPECT_TRUE(before_ > empty);
-  EXPECT_TRUE(before_ >= empty);
-
-  EXPECT_FALSE(empty > before_);
-  EXPECT_FALSE(before_ < empty);
-}
-
-TEST(IntSpan, ExposesContainerTypesAndConsts) {
-  absl::Span<int> slice;
-  CheckType<absl::Span<int>::iterator>(slice.begin());
-  EXPECT_TRUE((std::is_convertible<decltype(slice.begin()),
-                                   absl::Span<int>::const_iterator>::value));
-  CheckType<absl::Span<int>::const_iterator>(slice.cbegin());
-  EXPECT_TRUE((std::is_convertible<decltype(slice.end()),
-                                   absl::Span<int>::const_iterator>::value));
-  CheckType<absl::Span<int>::const_iterator>(slice.cend());
-  CheckType<absl::Span<int>::reverse_iterator>(slice.rend());
-  EXPECT_TRUE(
-      (std::is_convertible<decltype(slice.rend()),
-                           absl::Span<int>::const_reverse_iterator>::value));
-  CheckType<absl::Span<int>::const_reverse_iterator>(slice.crend());
-  testing::StaticAssertTypeEq<int, absl::Span<int>::value_type>();
-  testing::StaticAssertTypeEq<int, absl::Span<const int>::value_type>();
-  testing::StaticAssertTypeEq<int*, absl::Span<int>::pointer>();
-  testing::StaticAssertTypeEq<const int*, absl::Span<const int>::pointer>();
-  testing::StaticAssertTypeEq<int&, absl::Span<int>::reference>();
-  testing::StaticAssertTypeEq<const int&, absl::Span<const int>::reference>();
-  testing::StaticAssertTypeEq<const int&, absl::Span<int>::const_reference>();
-  testing::StaticAssertTypeEq<const int&,
-                              absl::Span<const int>::const_reference>();
-  EXPECT_EQ(static_cast<absl::Span<int>::size_type>(-1), absl::Span<int>::npos);
-}
-
-TEST(IntSpan, IteratorsAndReferences) {
-  auto accept_pointer = [](int*) {};
-  auto accept_reference = [](int&) {};
-  auto accept_iterator = [](absl::Span<int>::iterator) {};
-  auto accept_const_iterator = [](absl::Span<int>::const_iterator) {};
-  auto accept_reverse_iterator = [](absl::Span<int>::reverse_iterator) {};
-  auto accept_const_reverse_iterator =
-      [](absl::Span<int>::const_reverse_iterator) {};
-
-  int a[1];
-  absl::Span<int> s = a;
-
-  accept_pointer(s.data());
-  accept_iterator(s.begin());
-  accept_const_iterator(s.begin());
-  accept_const_iterator(s.cbegin());
-  accept_iterator(s.end());
-  accept_const_iterator(s.end());
-  accept_const_iterator(s.cend());
-  accept_reverse_iterator(s.rbegin());
-  accept_const_reverse_iterator(s.rbegin());
-  accept_const_reverse_iterator(s.crbegin());
-  accept_reverse_iterator(s.rend());
-  accept_const_reverse_iterator(s.rend());
-  accept_const_reverse_iterator(s.crend());
-
-  accept_reference(s[0]);
-  accept_reference(s.at(0));
-  accept_reference(s.front());
-  accept_reference(s.back());
-}
-
-TEST(IntSpan, IteratorsAndReferences_Const) {
-  auto accept_pointer = [](int*) {};
-  auto accept_reference = [](int&) {};
-  auto accept_iterator = [](absl::Span<int>::iterator) {};
-  auto accept_const_iterator = [](absl::Span<int>::const_iterator) {};
-  auto accept_reverse_iterator = [](absl::Span<int>::reverse_iterator) {};
-  auto accept_const_reverse_iterator =
-      [](absl::Span<int>::const_reverse_iterator) {};
-
-  int a[1];
-  const absl::Span<int> s = a;
-
-  accept_pointer(s.data());
-  accept_iterator(s.begin());
-  accept_const_iterator(s.begin());
-  accept_const_iterator(s.cbegin());
-  accept_iterator(s.end());
-  accept_const_iterator(s.end());
-  accept_const_iterator(s.cend());
-  accept_reverse_iterator(s.rbegin());
-  accept_const_reverse_iterator(s.rbegin());
-  accept_const_reverse_iterator(s.crbegin());
-  accept_reverse_iterator(s.rend());
-  accept_const_reverse_iterator(s.rend());
-  accept_const_reverse_iterator(s.crend());
-
-  accept_reference(s[0]);
-  accept_reference(s.at(0));
-  accept_reference(s.front());
-  accept_reference(s.back());
-}
-
-TEST(IntSpan, NoexceptTest) {
-  int a[] = {1, 2, 3};
-  std::vector<int> v;
-  EXPECT_TRUE(noexcept(absl::Span<const int>()));
-  EXPECT_TRUE(noexcept(absl::Span<const int>(a, 2)));
-  EXPECT_TRUE(noexcept(absl::Span<const int>(a)));
-  EXPECT_TRUE(noexcept(absl::Span<const int>(v)));
-  EXPECT_TRUE(noexcept(absl::Span<int>(v)));
-  EXPECT_TRUE(noexcept(absl::Span<const int>({1, 2, 3})));
-  EXPECT_TRUE(noexcept(absl::MakeSpan(v)));
-  EXPECT_TRUE(noexcept(absl::MakeSpan(a)));
-  EXPECT_TRUE(noexcept(absl::MakeSpan(a, 2)));
-  EXPECT_TRUE(noexcept(absl::MakeSpan(a, a + 1)));
-  EXPECT_TRUE(noexcept(absl::MakeConstSpan(v)));
-  EXPECT_TRUE(noexcept(absl::MakeConstSpan(a)));
-  EXPECT_TRUE(noexcept(absl::MakeConstSpan(a, 2)));
-  EXPECT_TRUE(noexcept(absl::MakeConstSpan(a, a + 1)));
-
-  absl::Span<int> s(v);
-  EXPECT_TRUE(noexcept(s.data()));
-  EXPECT_TRUE(noexcept(s.size()));
-  EXPECT_TRUE(noexcept(s.length()));
-  EXPECT_TRUE(noexcept(s.empty()));
-  EXPECT_TRUE(noexcept(s[0]));
-  EXPECT_TRUE(noexcept(s.front()));
-  EXPECT_TRUE(noexcept(s.back()));
-  EXPECT_TRUE(noexcept(s.begin()));
-  EXPECT_TRUE(noexcept(s.cbegin()));
-  EXPECT_TRUE(noexcept(s.end()));
-  EXPECT_TRUE(noexcept(s.cend()));
-  EXPECT_TRUE(noexcept(s.rbegin()));
-  EXPECT_TRUE(noexcept(s.crbegin()));
-  EXPECT_TRUE(noexcept(s.rend()));
-  EXPECT_TRUE(noexcept(s.crend()));
-  EXPECT_TRUE(noexcept(s.remove_prefix(0)));
-  EXPECT_TRUE(noexcept(s.remove_suffix(0)));
-}
-
-// ConstexprTester exercises expressions in a constexpr context. Simply placing
-// the expression in a constexpr function is not enough, as some compilers will
-// simply compile the constexpr function as runtime code. Using template
-// parameters forces compile-time execution.
-template <int i>
-struct ConstexprTester {};
-
-#define ABSL_TEST_CONSTEXPR(expr)                       \
-  do {                                                  \
-    ABSL_ATTRIBUTE_UNUSED ConstexprTester<(expr, 1)> t; \
-  } while (0)
-
-struct ContainerWithConstexprMethods {
-  constexpr int size() const { return 1; }
-  constexpr const int* data() const { return &i; }
-  const int i;
-};
-
-TEST(ConstIntSpan, ConstexprTest) {
-  static constexpr int a[] = {1, 2, 3};
-  static constexpr int sized_arr[2] = {1, 2};
-  static constexpr ContainerWithConstexprMethods c{1};
-  ABSL_TEST_CONSTEXPR(absl::Span<const int>());
-  ABSL_TEST_CONSTEXPR(absl::Span<const int>(a, 2));
-  ABSL_TEST_CONSTEXPR(absl::Span<const int>(sized_arr));
-  ABSL_TEST_CONSTEXPR(absl::Span<const int>(c));
-  ABSL_TEST_CONSTEXPR(absl::MakeSpan(&a[0], 1));
-  ABSL_TEST_CONSTEXPR(absl::MakeSpan(c));
-  ABSL_TEST_CONSTEXPR(absl::MakeSpan(a));
-  ABSL_TEST_CONSTEXPR(absl::MakeConstSpan(&a[0], 1));
-  ABSL_TEST_CONSTEXPR(absl::MakeConstSpan(c));
-  ABSL_TEST_CONSTEXPR(absl::MakeConstSpan(a));
-
-  constexpr absl::Span<const int> span = c;
-  ABSL_TEST_CONSTEXPR(span.data());
-  ABSL_TEST_CONSTEXPR(span.size());
-  ABSL_TEST_CONSTEXPR(span.length());
-  ABSL_TEST_CONSTEXPR(span.empty());
-  ABSL_TEST_CONSTEXPR(span.begin());
-  ABSL_TEST_CONSTEXPR(span.cbegin());
-  ABSL_TEST_CONSTEXPR(span.subspan(0, 0));
-  ABSL_TEST_CONSTEXPR(span.first(1));
-  ABSL_TEST_CONSTEXPR(span.last(1));
-  ABSL_TEST_CONSTEXPR(span[0]);
-}
-
-struct BigStruct {
-  char bytes[10000];
-};
-
-TEST(Span, SpanSize) {
-  EXPECT_LE(sizeof(absl::Span<int>), 2 * sizeof(void*));
-  EXPECT_LE(sizeof(absl::Span<BigStruct>), 2 * sizeof(void*));
-}
-
-TEST(Span, Hash) {
-  int array[] = {1, 2, 3, 4};
-  int array2[] = {1, 2, 3};
-  using T = absl::Span<const int>;
-  EXPECT_TRUE(absl::VerifyTypeImplementsAbslHashCorrectly(
-      {// Empties
-       T(), T(nullptr, 0), T(array, 0), T(array2, 0),
-       // Different array with same value
-       T(array, 3), T(array2), T({1, 2, 3}),
-       // Same array, but different length
-       T(array, 1), T(array, 2),
-       // Same length, but different array
-       T(array + 1, 2), T(array + 2, 2)}));
-}
-
-}  // namespace
diff --git a/third_party/abseil/absl/types/variant.h b/third_party/abseil/absl/types/variant.h
deleted file mode 100644
index ac93464..0000000
--- a/third_party/abseil/absl/types/variant.h
+++ /dev/null
@@ -1,866 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// -----------------------------------------------------------------------------
-// variant.h
-// -----------------------------------------------------------------------------
-//
-// This header file defines an `absl::variant` type for holding a type-safe
-// value of some prescribed set of types (noted as alternative types), and
-// associated functions for managing variants.
-//
-// The `absl::variant` type is a form of type-safe union. An `absl::variant`
-// should always hold a value of one of its alternative types (except in the
-// "valueless by exception state" -- see below). A default-constructed
-// `absl::variant` will hold the value of its first alternative type, provided
-// it is default-constructible.
-//
-// In exceptional cases due to error, an `absl::variant` can hold no
-// value (known as a "valueless by exception" state), though this is not the
-// norm.
-//
-// As with `absl::optional`, an `absl::variant` -- when it holds a value --
-// allocates a value of that type directly within the `variant` itself; it
-// cannot hold a reference, array, or the type `void`; it can, however, hold a
-// pointer to externally managed memory.
-//
-// `absl::variant` is a C++11 compatible version of the C++17 `std::variant`
-// abstraction and is designed to be a drop-in replacement for code compliant
-// with C++17.
-
-#ifndef ABSL_TYPES_VARIANT_H_
-#define ABSL_TYPES_VARIANT_H_
-
-#include "absl/base/config.h"
-#include "absl/utility/utility.h"
-
-#ifdef ABSL_USES_STD_VARIANT
-
-#include <variant>  // IWYU pragma: export
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-using std::bad_variant_access;
-using std::get;
-using std::get_if;
-using std::holds_alternative;
-using std::monostate;
-using std::variant;
-using std::variant_alternative;
-using std::variant_alternative_t;
-using std::variant_npos;
-using std::variant_size;
-using std::variant_size_v;
-using std::visit;
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#else  // ABSL_USES_STD_VARIANT
-
-#include <functional>
-#include <new>
-#include <type_traits>
-#include <utility>
-
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-#include "absl/meta/type_traits.h"
-#include "absl/types/internal/variant.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// -----------------------------------------------------------------------------
-// absl::variant
-// -----------------------------------------------------------------------------
-//
-// An `absl::variant` type is a form of type-safe union. An `absl::variant` --
-// except in exceptional cases -- always holds a value of one of its alternative
-// types.
-//
-// Example:
-//
-//   // Construct a variant that holds either an integer or a std::string and
-//   // assign it to a std::string.
-//   absl::variant<int, std::string> v = std::string("abc");
-//
-//   // A default-constructed variant will hold a value-initialized value of
-//   // the first alternative type.
-//   auto a = absl::variant<int, std::string>();   // Holds an int of value '0'.
-//
-//   // variants are assignable.
-//
-//   // copy assignment
-//   auto v1 = absl::variant<int, std::string>("abc");
-//   auto v2 = absl::variant<int, std::string>(10);
-//   v2 = v1;  // copy assign
-//
-//   // move assignment
-//   auto v1 = absl::variant<int, std::string>("abc");
-//   v1 = absl::variant<int, std::string>(10);
-//
-//   // assignment through type conversion
-//   a = 128;         // variant contains int
-//   a = "128";       // variant contains std::string
-//
-// An `absl::variant` holding a value of one of its alternative types `T` holds
-// an allocation of `T` directly within the variant itself. An `absl::variant`
-// is not allowed to allocate additional storage, such as dynamic memory, to
-// allocate the contained value. The contained value shall be allocated in a
-// region of the variant storage suitably aligned for all alternative types.
-template <typename... Ts>
-class variant;
-
-// swap()
-//
-// Swaps two `absl::variant` values. This function is equivalent to `v.swap(w)`
-// where `v` and `w` are `absl::variant` types.
-//
-// Note that this function requires all alternative types to be both swappable
-// and move-constructible, because any two variants may refer to either the same
-// type (in which case, they will be swapped) or to two different types (in
-// which case the values will need to be moved).
-//
-template <
-    typename... Ts,
-    absl::enable_if_t<
-        absl::conjunction<std::is_move_constructible<Ts>...,
-                          type_traits_internal::IsSwappable<Ts>...>::value,
-        int> = 0>
-void swap(variant<Ts...>& v, variant<Ts...>& w) noexcept(noexcept(v.swap(w))) {
-  v.swap(w);
-}
-
-// variant_size
-//
-// Returns the number of alternative types available for a given `absl::variant`
-// type as a compile-time constant expression. As this is a class template, it
-// is not generally useful for accessing the number of alternative types of
-// any given `absl::variant` instance.
-//
-// Example:
-//
-//   auto a = absl::variant<int, std::string>;
-//   constexpr int num_types =
-//       absl::variant_size<absl::variant<int, std::string>>();
-//
-//   // You can also use the member constant `value`.
-//   constexpr int num_types =
-//       absl::variant_size<absl::variant<int, std::string>>::value;
-//
-//   // `absl::variant_size` is more valuable for use in generic code:
-//   template <typename Variant>
-//   constexpr bool IsVariantMultivalue() {
-//       return absl::variant_size<Variant>() > 1;
-//   }
-//
-// Note that the set of cv-qualified specializations of `variant_size` are
-// provided to ensure that those specializations compile (especially when passed
-// within template logic).
-template <class T>
-struct variant_size;
-
-template <class... Ts>
-struct variant_size<variant<Ts...>>
-    : std::integral_constant<std::size_t, sizeof...(Ts)> {};
-
-// Specialization of `variant_size` for const qualified variants.
-template <class T>
-struct variant_size<const T> : variant_size<T>::type {};
-
-// Specialization of `variant_size` for volatile qualified variants.
-template <class T>
-struct variant_size<volatile T> : variant_size<T>::type {};
-
-// Specialization of `variant_size` for const volatile qualified variants.
-template <class T>
-struct variant_size<const volatile T> : variant_size<T>::type {};
-
-// variant_alternative
-//
-// Returns the alternative type for a given `absl::variant` at the passed
-// index value as a compile-time constant expression. As this is a class
-// template resulting in a type, it is not useful for access of the run-time
-// value of any given `absl::variant` variable.
-//
-// Example:
-//
-//   // The type of the 0th alternative is "int".
-//   using alternative_type_0
-//     = absl::variant_alternative<0, absl::variant<int, std::string>>::type;
-//
-//   static_assert(std::is_same<alternative_type_0, int>::value, "");
-//
-//   // `absl::variant_alternative` is more valuable for use in generic code:
-//   template <typename Variant>
-//   constexpr bool IsFirstElementTrivial() {
-//       return std::is_trivial_v<variant_alternative<0, Variant>::type>;
-//   }
-//
-// Note that the set of cv-qualified specializations of `variant_alternative`
-// are provided to ensure that those specializations compile (especially when
-// passed within template logic).
-template <std::size_t I, class T>
-struct variant_alternative;
-
-template <std::size_t I, class... Types>
-struct variant_alternative<I, variant<Types...>> {
-  using type =
-      variant_internal::VariantAlternativeSfinaeT<I, variant<Types...>>;
-};
-
-// Specialization of `variant_alternative` for const qualified variants.
-template <std::size_t I, class T>
-struct variant_alternative<I, const T> {
-  using type = const typename variant_alternative<I, T>::type;
-};
-
-// Specialization of `variant_alternative` for volatile qualified variants.
-template <std::size_t I, class T>
-struct variant_alternative<I, volatile T> {
-  using type = volatile typename variant_alternative<I, T>::type;
-};
-
-// Specialization of `variant_alternative` for const volatile qualified
-// variants.
-template <std::size_t I, class T>
-struct variant_alternative<I, const volatile T> {
-  using type = const volatile typename variant_alternative<I, T>::type;
-};
-
-// Template type alias for variant_alternative<I, T>::type.
-//
-// Example:
-//
-//   using alternative_type_0
-//     = absl::variant_alternative_t<0, absl::variant<int, std::string>>;
-//   static_assert(std::is_same<alternative_type_0, int>::value, "");
-template <std::size_t I, class T>
-using variant_alternative_t = typename variant_alternative<I, T>::type;
-
-// holds_alternative()
-//
-// Checks whether the given variant currently holds a given alternative type,
-// returning `true` if so.
-//
-// Example:
-//
-//   absl::variant<int, std::string> foo = 42;
-//   if (absl::holds_alternative<int>(foo)) {
-//       std::cout << "The variant holds an integer";
-//   }
-template <class T, class... Types>
-constexpr bool holds_alternative(const variant<Types...>& v) noexcept {
-  static_assert(
-      variant_internal::UnambiguousIndexOfImpl<variant<Types...>, T,
-                                               0>::value != sizeof...(Types),
-      "The type T must occur exactly once in Types...");
-  return v.index() ==
-         variant_internal::UnambiguousIndexOf<variant<Types...>, T>::value;
-}
-
-// get()
-//
-// Returns a reference to the value currently within a given variant, using
-// either a unique alternative type amongst the variant's set of alternative
-// types, or the variant's index value. Attempting to get a variant's value
-// using a type that is not unique within the variant's set of alternative types
-// is a compile-time error. If the index of the alternative being specified is
-// different from the index of the alternative that is currently stored, throws
-// `absl::bad_variant_access`.
-//
-// Example:
-//
-//   auto a = absl::variant<int, std::string>;
-//
-//   // Get the value by type (if unique).
-//   int i = absl::get<int>(a);
-//
-//   auto b = absl::variant<int, int>;
-//
-//   // Getting the value by a type that is not unique is ill-formed.
-//   int j = absl::get<int>(b);     // Compile Error!
-//
-//   // Getting value by index not ambiguous and allowed.
-//   int k = absl::get<1>(b);
-
-// Overload for getting a variant's lvalue by type.
-template <class T, class... Types>
-constexpr T& get(variant<Types...>& v) {  // NOLINT
-  return variant_internal::VariantCoreAccess::CheckedAccess<
-      variant_internal::IndexOf<T, Types...>::value>(v);
-}
-
-// Overload for getting a variant's rvalue by type.
-// Note: `absl::move()` is required to allow use of constexpr in C++11.
-template <class T, class... Types>
-constexpr T&& get(variant<Types...>&& v) {
-  return variant_internal::VariantCoreAccess::CheckedAccess<
-      variant_internal::IndexOf<T, Types...>::value>(absl::move(v));
-}
-
-// Overload for getting a variant's const lvalue by type.
-template <class T, class... Types>
-constexpr const T& get(const variant<Types...>& v) {
-  return variant_internal::VariantCoreAccess::CheckedAccess<
-      variant_internal::IndexOf<T, Types...>::value>(v);
-}
-
-// Overload for getting a variant's const rvalue by type.
-// Note: `absl::move()` is required to allow use of constexpr in C++11.
-template <class T, class... Types>
-constexpr const T&& get(const variant<Types...>&& v) {
-  return variant_internal::VariantCoreAccess::CheckedAccess<
-      variant_internal::IndexOf<T, Types...>::value>(absl::move(v));
-}
-
-// Overload for getting a variant's lvalue by index.
-template <std::size_t I, class... Types>
-constexpr variant_alternative_t<I, variant<Types...>>& get(
-    variant<Types...>& v) {  // NOLINT
-  return variant_internal::VariantCoreAccess::CheckedAccess<I>(v);
-}
-
-// Overload for getting a variant's rvalue by index.
-// Note: `absl::move()` is required to allow use of constexpr in C++11.
-template <std::size_t I, class... Types>
-constexpr variant_alternative_t<I, variant<Types...>>&& get(
-    variant<Types...>&& v) {
-  return variant_internal::VariantCoreAccess::CheckedAccess<I>(absl::move(v));
-}
-
-// Overload for getting a variant's const lvalue by index.
-template <std::size_t I, class... Types>
-constexpr const variant_alternative_t<I, variant<Types...>>& get(
-    const variant<Types...>& v) {
-  return variant_internal::VariantCoreAccess::CheckedAccess<I>(v);
-}
-
-// Overload for getting a variant's const rvalue by index.
-// Note: `absl::move()` is required to allow use of constexpr in C++11.
-template <std::size_t I, class... Types>
-constexpr const variant_alternative_t<I, variant<Types...>>&& get(
-    const variant<Types...>&& v) {
-  return variant_internal::VariantCoreAccess::CheckedAccess<I>(absl::move(v));
-}
-
-// get_if()
-//
-// Returns a pointer to the value currently stored within a given variant, if
-// present, using either a unique alternative type amongst the variant's set of
-// alternative types, or the variant's index value. If such a value does not
-// exist, returns `nullptr`.
-//
-// As with `get`, attempting to get a variant's value using a type that is not
-// unique within the variant's set of alternative types is a compile-time error.
-
-// Overload for getting a pointer to the value stored in the given variant by
-// index.
-template <std::size_t I, class... Types>
-constexpr absl::add_pointer_t<variant_alternative_t<I, variant<Types...>>>
-get_if(variant<Types...>* v) noexcept {
-  return (v != nullptr && v->index() == I)
-             ? std::addressof(
-                   variant_internal::VariantCoreAccess::Access<I>(*v))
-             : nullptr;
-}
-
-// Overload for getting a pointer to the const value stored in the given
-// variant by index.
-template <std::size_t I, class... Types>
-constexpr absl::add_pointer_t<const variant_alternative_t<I, variant<Types...>>>
-get_if(const variant<Types...>* v) noexcept {
-  return (v != nullptr && v->index() == I)
-             ? std::addressof(
-                   variant_internal::VariantCoreAccess::Access<I>(*v))
-             : nullptr;
-}
-
-// Overload for getting a pointer to the value stored in the given variant by
-// type.
-template <class T, class... Types>
-constexpr absl::add_pointer_t<T> get_if(variant<Types...>* v) noexcept {
-  return absl::get_if<variant_internal::IndexOf<T, Types...>::value>(v);
-}
-
-// Overload for getting a pointer to the const value stored in the given variant
-// by type.
-template <class T, class... Types>
-constexpr absl::add_pointer_t<const T> get_if(
-    const variant<Types...>* v) noexcept {
-  return absl::get_if<variant_internal::IndexOf<T, Types...>::value>(v);
-}
-
-// visit()
-//
-// Calls a provided functor on a given set of variants. `absl::visit()` is
-// commonly used to conditionally inspect the state of a given variant (or set
-// of variants).
-//
-// The functor must return the same type when called with any of the variants'
-// alternatives.
-//
-// Example:
-//
-//   // Define a visitor functor
-//   struct GetVariant {
-//       template<typename T>
-//       void operator()(const T& i) const {
-//         std::cout << "The variant's value is: " << i;
-//       }
-//   };
-//
-//   // Declare our variant, and call `absl::visit()` on it.
-//   // Note that `GetVariant()` returns void in either case.
-//   absl::variant<int, std::string> foo = std::string("foo");
-//   GetVariant visitor;
-//   absl::visit(visitor, foo);  // Prints `The variant's value is: foo'
-template <typename Visitor, typename... Variants>
-variant_internal::VisitResult<Visitor, Variants...> visit(Visitor&& vis,
-                                                          Variants&&... vars) {
-  return variant_internal::
-      VisitIndices<variant_size<absl::decay_t<Variants> >::value...>::Run(
-          variant_internal::PerformVisitation<Visitor, Variants...>{
-              std::forward_as_tuple(absl::forward<Variants>(vars)...),
-              absl::forward<Visitor>(vis)},
-          vars.index()...);
-}
-
-// monostate
-//
-// The monostate class serves as a first alternative type for a variant for
-// which the first variant type is otherwise not default-constructible.
-struct monostate {};
-
-// `absl::monostate` Relational Operators
-
-constexpr bool operator<(monostate, monostate) noexcept { return false; }
-constexpr bool operator>(monostate, monostate) noexcept { return false; }
-constexpr bool operator<=(monostate, monostate) noexcept { return true; }
-constexpr bool operator>=(monostate, monostate) noexcept { return true; }
-constexpr bool operator==(monostate, monostate) noexcept { return true; }
-constexpr bool operator!=(monostate, monostate) noexcept { return false; }
-
-
-//------------------------------------------------------------------------------
-// `absl::variant` Template Definition
-//------------------------------------------------------------------------------
-template <typename T0, typename... Tn>
-class variant<T0, Tn...> : private variant_internal::VariantBase<T0, Tn...> {
-  static_assert(absl::conjunction<std::is_object<T0>,
-                                  std::is_object<Tn>...>::value,
-                "Attempted to instantiate a variant containing a non-object "
-                "type.");
-  // Intentionally not qualifying `negation` with `absl::` to work around a bug
-  // in MSVC 2015 with inline namespace and variadic template.
-  static_assert(absl::conjunction<negation<std::is_array<T0> >,
-                                  negation<std::is_array<Tn> >...>::value,
-                "Attempted to instantiate a variant containing an array type.");
-  static_assert(absl::conjunction<std::is_nothrow_destructible<T0>,
-                                  std::is_nothrow_destructible<Tn>...>::value,
-                "Attempted to instantiate a variant containing a non-nothrow "
-                "destructible type.");
-
-  friend struct variant_internal::VariantCoreAccess;
-
- private:
-  using Base = variant_internal::VariantBase<T0, Tn...>;
-
- public:
-  // Constructors
-
-  // Constructs a variant holding a default-initialized value of the first
-  // alternative type.
-  constexpr variant() /*noexcept(see 111above)*/ = default;
-
-  // Copy constructor, standard semantics
-  variant(const variant& other) = default;
-
-  // Move constructor, standard semantics
-  variant(variant&& other) /*noexcept(see above)*/ = default;
-
-  // Constructs a variant of an alternative type specified by overload
-  // resolution of the provided forwarding arguments through
-  // direct-initialization.
-  //
-  // Note: If the selected constructor is a constexpr constructor, this
-  // constructor shall be a constexpr constructor.
-  //
-  // NOTE: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0608r1.html
-  // has been voted passed the design phase in the C++ standard meeting in Mar
-  // 2018. It will be implemented and integrated into `absl::variant`.
-  template <
-      class T,
-      std::size_t I = std::enable_if<
-          variant_internal::IsNeitherSelfNorInPlace<variant,
-                                                    absl::decay_t<T>>::value,
-          variant_internal::IndexOfConstructedType<variant, T>>::type::value,
-      class Tj = absl::variant_alternative_t<I, variant>,
-      absl::enable_if_t<std::is_constructible<Tj, T>::value>* =
-          nullptr>
-  constexpr variant(T&& t) noexcept(std::is_nothrow_constructible<Tj, T>::value)
-      : Base(variant_internal::EmplaceTag<I>(), absl::forward<T>(t)) {}
-
-  // Constructs a variant of an alternative type from the arguments through
-  // direct-initialization.
-  //
-  // Note: If the selected constructor is a constexpr constructor, this
-  // constructor shall be a constexpr constructor.
-  template <class T, class... Args,
-            typename std::enable_if<std::is_constructible<
-                variant_internal::UnambiguousTypeOfT<variant, T>,
-                Args...>::value>::type* = nullptr>
-  constexpr explicit variant(in_place_type_t<T>, Args&&... args)
-      : Base(variant_internal::EmplaceTag<
-                 variant_internal::UnambiguousIndexOf<variant, T>::value>(),
-             absl::forward<Args>(args)...) {}
-
-  // Constructs a variant of an alternative type from an initializer list
-  // and other arguments through direct-initialization.
-  //
-  // Note: If the selected constructor is a constexpr constructor, this
-  // constructor shall be a constexpr constructor.
-  template <class T, class U, class... Args,
-            typename std::enable_if<std::is_constructible<
-                variant_internal::UnambiguousTypeOfT<variant, T>,
-                std::initializer_list<U>&, Args...>::value>::type* = nullptr>
-  constexpr explicit variant(in_place_type_t<T>, std::initializer_list<U> il,
-                             Args&&... args)
-      : Base(variant_internal::EmplaceTag<
-                 variant_internal::UnambiguousIndexOf<variant, T>::value>(),
-             il, absl::forward<Args>(args)...) {}
-
-  // Constructs a variant of an alternative type from a provided index,
-  // through value-initialization using the provided forwarded arguments.
-  template <std::size_t I, class... Args,
-            typename std::enable_if<std::is_constructible<
-                variant_internal::VariantAlternativeSfinaeT<I, variant>,
-                Args...>::value>::type* = nullptr>
-  constexpr explicit variant(in_place_index_t<I>, Args&&... args)
-      : Base(variant_internal::EmplaceTag<I>(), absl::forward<Args>(args)...) {}
-
-  // Constructs a variant of an alternative type from a provided index,
-  // through value-initialization of an initializer list and the provided
-  // forwarded arguments.
-  template <std::size_t I, class U, class... Args,
-            typename std::enable_if<std::is_constructible<
-                variant_internal::VariantAlternativeSfinaeT<I, variant>,
-                std::initializer_list<U>&, Args...>::value>::type* = nullptr>
-  constexpr explicit variant(in_place_index_t<I>, std::initializer_list<U> il,
-                             Args&&... args)
-      : Base(variant_internal::EmplaceTag<I>(), il,
-             absl::forward<Args>(args)...) {}
-
-  // Destructors
-
-  // Destroys the variant's currently contained value, provided that
-  // `absl::valueless_by_exception()` is false.
-  ~variant() = default;
-
-  // Assignment Operators
-
-  // Copy assignment operator
-  variant& operator=(const variant& other) = default;
-
-  // Move assignment operator
-  variant& operator=(variant&& other) /*noexcept(see above)*/ = default;
-
-  // Converting assignment operator
-  //
-  // NOTE: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0608r1.html
-  // has been voted passed the design phase in the C++ standard meeting in Mar
-  // 2018. It will be implemented and integrated into `absl::variant`.
-  template <
-      class T,
-      std::size_t I = std::enable_if<
-          !std::is_same<absl::decay_t<T>, variant>::value,
-          variant_internal::IndexOfConstructedType<variant, T>>::type::value,
-      class Tj = absl::variant_alternative_t<I, variant>,
-      typename std::enable_if<std::is_assignable<Tj&, T>::value &&
-                              std::is_constructible<Tj, T>::value>::type* =
-          nullptr>
-  variant& operator=(T&& t) noexcept(
-      std::is_nothrow_assignable<Tj&, T>::value&&
-          std::is_nothrow_constructible<Tj, T>::value) {
-    variant_internal::VisitIndices<sizeof...(Tn) + 1>::Run(
-        variant_internal::VariantCoreAccess::MakeConversionAssignVisitor(
-            this, absl::forward<T>(t)),
-        index());
-
-    return *this;
-  }
-
-
-  // emplace() Functions
-
-  // Constructs a value of the given alternative type T within the variant. The
-  // existing value of the variant is destroyed first (provided that
-  // `absl::valueless_by_exception()` is false). Requires that T is unambiguous
-  // in the variant.
-  //
-  // Example:
-  //
-  //   absl::variant<std::vector<int>, int, std::string> v;
-  //   v.emplace<int>(99);
-  //   v.emplace<std::string>("abc");
-  template <
-      class T, class... Args,
-      typename std::enable_if<std::is_constructible<
-          absl::variant_alternative_t<
-              variant_internal::UnambiguousIndexOf<variant, T>::value, variant>,
-          Args...>::value>::type* = nullptr>
-  T& emplace(Args&&... args) {
-    return variant_internal::VariantCoreAccess::Replace<
-        variant_internal::UnambiguousIndexOf<variant, T>::value>(
-        this, absl::forward<Args>(args)...);
-  }
-
-  // Constructs a value of the given alternative type T within the variant using
-  // an initializer list. The existing value of the variant is destroyed first
-  // (provided that `absl::valueless_by_exception()` is false). Requires that T
-  // is unambiguous in the variant.
-  //
-  // Example:
-  //
-  //   absl::variant<std::vector<int>, int, std::string> v;
-  //   v.emplace<std::vector<int>>({0, 1, 2});
-  template <
-      class T, class U, class... Args,
-      typename std::enable_if<std::is_constructible<
-          absl::variant_alternative_t<
-              variant_internal::UnambiguousIndexOf<variant, T>::value, variant>,
-          std::initializer_list<U>&, Args...>::value>::type* = nullptr>
-  T& emplace(std::initializer_list<U> il, Args&&... args) {
-    return variant_internal::VariantCoreAccess::Replace<
-        variant_internal::UnambiguousIndexOf<variant, T>::value>(
-        this, il, absl::forward<Args>(args)...);
-  }
-
-  // Destroys the current value of the variant (provided that
-  // `absl::valueless_by_exception()` is false) and constructs a new value at
-  // the given index.
-  //
-  // Example:
-  //
-  //   absl::variant<std::vector<int>, int, int> v;
-  //   v.emplace<1>(99);
-  //   v.emplace<2>(98);
-  //   v.emplace<int>(99);  // Won't compile. 'int' isn't a unique type.
-  template <std::size_t I, class... Args,
-            typename std::enable_if<
-                std::is_constructible<absl::variant_alternative_t<I, variant>,
-                                      Args...>::value>::type* = nullptr>
-  absl::variant_alternative_t<I, variant>& emplace(Args&&... args) {
-    return variant_internal::VariantCoreAccess::Replace<I>(
-        this, absl::forward<Args>(args)...);
-  }
-
-  // Destroys the current value of the variant (provided that
-  // `absl::valueless_by_exception()` is false) and constructs a new value at
-  // the given index using an initializer list and the provided arguments.
-  //
-  // Example:
-  //
-  //   absl::variant<std::vector<int>, int, int> v;
-  //   v.emplace<0>({0, 1, 2});
-  template <std::size_t I, class U, class... Args,
-            typename std::enable_if<std::is_constructible<
-                absl::variant_alternative_t<I, variant>,
-                std::initializer_list<U>&, Args...>::value>::type* = nullptr>
-  absl::variant_alternative_t<I, variant>& emplace(std::initializer_list<U> il,
-                                                   Args&&... args) {
-    return variant_internal::VariantCoreAccess::Replace<I>(
-        this, il, absl::forward<Args>(args)...);
-  }
-
-  // variant::valueless_by_exception()
-  //
-  // Returns false if and only if the variant currently holds a valid value.
-  constexpr bool valueless_by_exception() const noexcept {
-    return this->index_ == absl::variant_npos;
-  }
-
-  // variant::index()
-  //
-  // Returns the index value of the variant's currently selected alternative
-  // type.
-  constexpr std::size_t index() const noexcept { return this->index_; }
-
-  // variant::swap()
-  //
-  // Swaps the values of two variant objects.
-  //
-  void swap(variant& rhs) noexcept(
-      absl::conjunction<
-          std::is_nothrow_move_constructible<T0>,
-          std::is_nothrow_move_constructible<Tn>...,
-          type_traits_internal::IsNothrowSwappable<T0>,
-          type_traits_internal::IsNothrowSwappable<Tn>...>::value) {
-    return variant_internal::VisitIndices<sizeof...(Tn) + 1>::Run(
-        variant_internal::Swap<T0, Tn...>{this, &rhs}, rhs.index());
-  }
-};
-
-// We need a valid declaration of variant<> for SFINAE and overload resolution
-// to work properly above, but we don't need a full declaration since this type
-// will never be constructed. This declaration, though incomplete, suffices.
-template <>
-class variant<>;
-
-//------------------------------------------------------------------------------
-// Relational Operators
-//------------------------------------------------------------------------------
-//
-// If neither operand is in the `variant::valueless_by_exception` state:
-//
-//   * If the index of both variants is the same, the relational operator
-//     returns the result of the corresponding relational operator for the
-//     corresponding alternative type.
-//   * If the index of both variants is not the same, the relational operator
-//     returns the result of that operation applied to the value of the left
-//     operand's index and the value of the right operand's index.
-//   * If at least one operand is in the valueless_by_exception state:
-//     - A variant in the valueless_by_exception state is only considered equal
-//       to another variant in the valueless_by_exception state.
-//     - If exactly one operand is in the valueless_by_exception state, the
-//       variant in the valueless_by_exception state is less than the variant
-//       that is not in the valueless_by_exception state.
-//
-// Note: The value 1 is added to each index in the relational comparisons such
-// that the index corresponding to the valueless_by_exception state wraps around
-// to 0 (the lowest value for the index type), and the remaining indices stay in
-// the same relative order.
-
-// Equal-to operator
-template <typename... Types>
-constexpr variant_internal::RequireAllHaveEqualT<Types...> operator==(
-    const variant<Types...>& a, const variant<Types...>& b) {
-  return (a.index() == b.index()) &&
-         variant_internal::VisitIndices<sizeof...(Types)>::Run(
-             variant_internal::EqualsOp<Types...>{&a, &b}, a.index());
-}
-
-// Not equal operator
-template <typename... Types>
-constexpr variant_internal::RequireAllHaveNotEqualT<Types...> operator!=(
-    const variant<Types...>& a, const variant<Types...>& b) {
-  return (a.index() != b.index()) ||
-         variant_internal::VisitIndices<sizeof...(Types)>::Run(
-             variant_internal::NotEqualsOp<Types...>{&a, &b}, a.index());
-}
-
-// Less-than operator
-template <typename... Types>
-constexpr variant_internal::RequireAllHaveLessThanT<Types...> operator<(
-    const variant<Types...>& a, const variant<Types...>& b) {
-  return (a.index() != b.index())
-             ? (a.index() + 1) < (b.index() + 1)
-             : variant_internal::VisitIndices<sizeof...(Types)>::Run(
-                   variant_internal::LessThanOp<Types...>{&a, &b}, a.index());
-}
-
-// Greater-than operator
-template <typename... Types>
-constexpr variant_internal::RequireAllHaveGreaterThanT<Types...> operator>(
-    const variant<Types...>& a, const variant<Types...>& b) {
-  return (a.index() != b.index())
-             ? (a.index() + 1) > (b.index() + 1)
-             : variant_internal::VisitIndices<sizeof...(Types)>::Run(
-                   variant_internal::GreaterThanOp<Types...>{&a, &b},
-                   a.index());
-}
-
-// Less-than or equal-to operator
-template <typename... Types>
-constexpr variant_internal::RequireAllHaveLessThanOrEqualT<Types...> operator<=(
-    const variant<Types...>& a, const variant<Types...>& b) {
-  return (a.index() != b.index())
-             ? (a.index() + 1) < (b.index() + 1)
-             : variant_internal::VisitIndices<sizeof...(Types)>::Run(
-                   variant_internal::LessThanOrEqualsOp<Types...>{&a, &b},
-                   a.index());
-}
-
-// Greater-than or equal-to operator
-template <typename... Types>
-constexpr variant_internal::RequireAllHaveGreaterThanOrEqualT<Types...>
-operator>=(const variant<Types...>& a, const variant<Types...>& b) {
-  return (a.index() != b.index())
-             ? (a.index() + 1) > (b.index() + 1)
-             : variant_internal::VisitIndices<sizeof...(Types)>::Run(
-                   variant_internal::GreaterThanOrEqualsOp<Types...>{&a, &b},
-                   a.index());
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace std {
-
-// hash()
-template <>  // NOLINT
-struct hash<absl::monostate> {
-  std::size_t operator()(absl::monostate) const { return 0; }
-};
-
-template <class... T>  // NOLINT
-struct hash<absl::variant<T...>>
-    : absl::variant_internal::VariantHashBase<absl::variant<T...>, void,
-                                              absl::remove_const_t<T>...> {};
-
-}  // namespace std
-
-#endif  // ABSL_USES_STD_VARIANT
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace variant_internal {
-
-// Helper visitor for converting a variant<Ts...>` into another type (mostly
-// variant) that can be constructed from any type.
-template <typename To>
-struct ConversionVisitor {
-  template <typename T>
-  To operator()(T&& v) const {
-    return To(std::forward<T>(v));
-  }
-};
-
-}  // namespace variant_internal
-
-// ConvertVariantTo()
-//
-// Helper functions to convert an `absl::variant` to a variant of another set of
-// types, provided that the alternative type of the new variant type can be
-// converted from any type in the source variant.
-//
-// Example:
-//
-//   absl::variant<name1, name2, float> InternalReq(const Req&);
-//
-//   // name1 and name2 are convertible to name
-//   absl::variant<name, float> ExternalReq(const Req& req) {
-//     return absl::ConvertVariantTo<absl::variant<name, float>>(
-//              InternalReq(req));
-//   }
-template <typename To, typename Variant>
-To ConvertVariantTo(Variant&& variant) {
-  return absl::visit(variant_internal::ConversionVisitor<To>{},
-                     std::forward<Variant>(variant));
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_TYPES_VARIANT_H_
diff --git a/third_party/abseil/absl/types/variant_benchmark.cc b/third_party/abseil/absl/types/variant_benchmark.cc
deleted file mode 100644
index 350b175..0000000
--- a/third_party/abseil/absl/types/variant_benchmark.cc
+++ /dev/null
@@ -1,222 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Unit tests for the variant template. The 'is' and 'IsEmpty' methods
-// of variant are not explicitly tested because they are used repeatedly
-// in building other tests. All other public variant methods should have
-// explicit tests.
-
-#include "absl/types/variant.h"
-
-#include <cstddef>
-#include <cstdlib>
-#include <string>
-#include <tuple>
-
-#include "benchmark/benchmark.h"
-#include "absl/utility/utility.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-template <std::size_t I>
-struct VariantAlternative {
-  char member;
-};
-
-template <class Indices>
-struct VariantOfAlternativesImpl;
-
-template <std::size_t... Indices>
-struct VariantOfAlternativesImpl<absl::index_sequence<Indices...>> {
-  using type = absl::variant<VariantAlternative<Indices>...>;
-};
-
-template <std::size_t NumAlternatives>
-using VariantOfAlternatives = typename VariantOfAlternativesImpl<
-    absl::make_index_sequence<NumAlternatives>>::type;
-
-struct Empty {};
-
-template <class... T>
-void Ignore(T...) noexcept {}
-
-template <class T>
-Empty DoNotOptimizeAndReturnEmpty(T&& arg) noexcept {
-  benchmark::DoNotOptimize(arg);
-  return {};
-}
-
-struct VisitorApplier {
-  struct Visitor {
-    template <class... T>
-    void operator()(T&&... args) const noexcept {
-      Ignore(DoNotOptimizeAndReturnEmpty(args)...);
-    }
-  };
-
-  template <class... Vars>
-  void operator()(const Vars&... vars) const noexcept {
-    absl::visit(Visitor(), vars...);
-  }
-};
-
-template <std::size_t NumIndices, std::size_t CurrIndex = NumIndices - 1>
-struct MakeWithIndex {
-  using Variant = VariantOfAlternatives<NumIndices>;
-
-  static Variant Run(std::size_t index) {
-    return index == CurrIndex
-               ? Variant(absl::in_place_index_t<CurrIndex>())
-               : MakeWithIndex<NumIndices, CurrIndex - 1>::Run(index);
-  }
-};
-
-template <std::size_t NumIndices>
-struct MakeWithIndex<NumIndices, 0> {
-  using Variant = VariantOfAlternatives<NumIndices>;
-
-  static Variant Run(std::size_t /*index*/) { return Variant(); }
-};
-
-template <std::size_t NumIndices, class Dimensions>
-struct MakeVariantTuple;
-
-template <class T, std::size_t /*I*/>
-using always_t = T;
-
-template <std::size_t NumIndices>
-VariantOfAlternatives<NumIndices> MakeVariant(std::size_t dimension,
-                                              std::size_t index) {
-  return dimension == 0
-             ? MakeWithIndex<NumIndices>::Run(index % NumIndices)
-             : MakeVariant<NumIndices>(dimension - 1, index / NumIndices);
-}
-
-template <std::size_t NumIndices, std::size_t... Dimensions>
-struct MakeVariantTuple<NumIndices, absl::index_sequence<Dimensions...>> {
-  using VariantTuple =
-      std::tuple<always_t<VariantOfAlternatives<NumIndices>, Dimensions>...>;
-
-  static VariantTuple Run(int index) {
-    return std::make_tuple(MakeVariant<NumIndices>(Dimensions, index)...);
-  }
-};
-
-constexpr std::size_t integral_pow(std::size_t base, std::size_t power) {
-  return power == 0 ? 1 : base * integral_pow(base, power - 1);
-}
-
-template <std::size_t End, std::size_t I = 0>
-struct VisitTestBody {
-  template <class Vars, class State>
-  static bool Run(Vars& vars, State& state) {
-    if (state.KeepRunning()) {
-      absl::apply(VisitorApplier(), vars[I]);
-      return VisitTestBody<End, I + 1>::Run(vars, state);
-    }
-    return false;
-  }
-};
-
-template <std::size_t End>
-struct VisitTestBody<End, End> {
-  template <class Vars, class State>
-  static bool Run(Vars& /*vars*/, State& /*state*/) {
-    return true;
-  }
-};
-
-// Visit operations where branch prediction is likely to give a boost.
-template <std::size_t NumIndices, std::size_t NumDimensions = 1>
-void BM_RedundantVisit(benchmark::State& state) {
-  auto vars =
-      MakeVariantTuple<NumIndices, absl::make_index_sequence<NumDimensions>>::
-          Run(static_cast<std::size_t>(state.range(0)));
-
-  for (auto _ : state) {  // NOLINT
-    benchmark::DoNotOptimize(vars);
-    absl::apply(VisitorApplier(), vars);
-  }
-}
-
-// Visit operations where branch prediction is unlikely to give a boost.
-template <std::size_t NumIndices, std::size_t NumDimensions = 1>
-void BM_Visit(benchmark::State& state) {
-  constexpr std::size_t num_possibilities =
-      integral_pow(NumIndices, NumDimensions);
-
-  using VariantTupleMaker =
-      MakeVariantTuple<NumIndices, absl::make_index_sequence<NumDimensions>>;
-  using Tuple = typename VariantTupleMaker::VariantTuple;
-
-  Tuple vars[num_possibilities];
-  for (std::size_t i = 0; i < num_possibilities; ++i)
-    vars[i] = VariantTupleMaker::Run(i);
-
-  while (VisitTestBody<num_possibilities>::Run(vars, state)) {
-  }
-}
-
-// Visitation
-//   Each visit is on a different variant with a different active alternative)
-
-// Unary visit
-BENCHMARK_TEMPLATE(BM_Visit, 1);
-BENCHMARK_TEMPLATE(BM_Visit, 2);
-BENCHMARK_TEMPLATE(BM_Visit, 3);
-BENCHMARK_TEMPLATE(BM_Visit, 4);
-BENCHMARK_TEMPLATE(BM_Visit, 5);
-BENCHMARK_TEMPLATE(BM_Visit, 6);
-BENCHMARK_TEMPLATE(BM_Visit, 7);
-BENCHMARK_TEMPLATE(BM_Visit, 8);
-BENCHMARK_TEMPLATE(BM_Visit, 16);
-BENCHMARK_TEMPLATE(BM_Visit, 32);
-BENCHMARK_TEMPLATE(BM_Visit, 64);
-
-// Binary visit
-BENCHMARK_TEMPLATE(BM_Visit, 1, 2);
-BENCHMARK_TEMPLATE(BM_Visit, 2, 2);
-BENCHMARK_TEMPLATE(BM_Visit, 3, 2);
-BENCHMARK_TEMPLATE(BM_Visit, 4, 2);
-BENCHMARK_TEMPLATE(BM_Visit, 5, 2);
-
-// Ternary visit
-BENCHMARK_TEMPLATE(BM_Visit, 1, 3);
-BENCHMARK_TEMPLATE(BM_Visit, 2, 3);
-BENCHMARK_TEMPLATE(BM_Visit, 3, 3);
-
-// Quaternary visit
-BENCHMARK_TEMPLATE(BM_Visit, 1, 4);
-BENCHMARK_TEMPLATE(BM_Visit, 2, 4);
-
-// Redundant Visitation
-//   Each visit consistently has the same alternative active
-
-// Unary visit
-BENCHMARK_TEMPLATE(BM_RedundantVisit, 1)->Arg(0);
-BENCHMARK_TEMPLATE(BM_RedundantVisit, 2)->DenseRange(0, 1);
-BENCHMARK_TEMPLATE(BM_RedundantVisit, 8)->DenseRange(0, 7);
-
-// Binary visit
-BENCHMARK_TEMPLATE(BM_RedundantVisit, 1, 2)->Arg(0);
-BENCHMARK_TEMPLATE(BM_RedundantVisit, 2, 2)
-    ->DenseRange(0, integral_pow(2, 2) - 1);
-BENCHMARK_TEMPLATE(BM_RedundantVisit, 4, 2)
-    ->DenseRange(0, integral_pow(4, 2) - 1);
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil/absl/types/variant_exception_safety_test.cc b/third_party/abseil/absl/types/variant_exception_safety_test.cc
deleted file mode 100644
index 439c6e1..0000000
--- a/third_party/abseil/absl/types/variant_exception_safety_test.cc
+++ /dev/null
@@ -1,532 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/variant.h"
-
-#include "absl/base/config.h"
-
-// This test is a no-op when absl::variant is an alias for std::variant and when
-// exceptions are not enabled.
-#if !defined(ABSL_USES_STD_VARIANT) && defined(ABSL_HAVE_EXCEPTIONS)
-
-#include <iostream>
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/internal/exception_safety_testing.h"
-#include "absl/memory/memory.h"
-
-// See comment in absl/base/config.h
-#if !defined(ABSL_INTERNAL_MSVC_2017_DBG_MODE)
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-using ::testing::MakeExceptionSafetyTester;
-using ::testing::strong_guarantee;
-using ::testing::TestNothrowOp;
-using ::testing::TestThrowingCtor;
-
-using Thrower = testing::ThrowingValue<>;
-using CopyNothrow = testing::ThrowingValue<testing::TypeSpec::kNoThrowCopy>;
-using MoveNothrow = testing::ThrowingValue<testing::TypeSpec::kNoThrowMove>;
-using ThrowingAlloc = testing::ThrowingAllocator<Thrower>;
-using ThrowerVec = std::vector<Thrower, ThrowingAlloc>;
-using ThrowingVariant =
-    absl::variant<Thrower, CopyNothrow, MoveNothrow, ThrowerVec>;
-
-struct ConversionException {};
-
-template <class T>
-struct ExceptionOnConversion {
-  operator T() const {  // NOLINT
-    throw ConversionException();
-  }
-};
-
-// Forces a variant into the valueless by exception state.
-void ToValuelessByException(ThrowingVariant& v) {  // NOLINT
-  try {
-    v.emplace<Thrower>();
-    v.emplace<Thrower>(ExceptionOnConversion<Thrower>());
-  } catch (const ConversionException&) {
-    // This space intentionally left blank.
-  }
-}
-
-// Check that variant is still in a usable state after an exception is thrown.
-testing::AssertionResult VariantInvariants(ThrowingVariant* v) {
-  using testing::AssertionFailure;
-  using testing::AssertionSuccess;
-
-  // Try using the active alternative
-  if (absl::holds_alternative<Thrower>(*v)) {
-    auto& t = absl::get<Thrower>(*v);
-    t = Thrower{-100};
-    if (t.Get() != -100) {
-      return AssertionFailure() << "Thrower should be assigned -100";
-    }
-  } else if (absl::holds_alternative<ThrowerVec>(*v)) {
-    auto& tv = absl::get<ThrowerVec>(*v);
-    tv.clear();
-    tv.emplace_back(-100);
-    if (tv.size() != 1 || tv[0].Get() != -100) {
-      return AssertionFailure() << "ThrowerVec should be {Thrower{-100}}";
-    }
-  } else if (absl::holds_alternative<CopyNothrow>(*v)) {
-    auto& t = absl::get<CopyNothrow>(*v);
-    t = CopyNothrow{-100};
-    if (t.Get() != -100) {
-      return AssertionFailure() << "CopyNothrow should be assigned -100";
-    }
-  } else if (absl::holds_alternative<MoveNothrow>(*v)) {
-    auto& t = absl::get<MoveNothrow>(*v);
-    t = MoveNothrow{-100};
-    if (t.Get() != -100) {
-      return AssertionFailure() << "MoveNothrow should be assigned -100";
-    }
-  }
-
-  // Try making variant valueless_by_exception
-  if (!v->valueless_by_exception()) ToValuelessByException(*v);
-  if (!v->valueless_by_exception()) {
-    return AssertionFailure() << "Variant should be valueless_by_exception";
-  }
-  try {
-    auto unused = absl::get<Thrower>(*v);
-    static_cast<void>(unused);
-    return AssertionFailure() << "Variant should not contain Thrower";
-  } catch (const absl::bad_variant_access&) {
-  } catch (...) {
-    return AssertionFailure() << "Unexpected exception throw from absl::get";
-  }
-
-  // Try using the variant
-  v->emplace<Thrower>(100);
-  if (!absl::holds_alternative<Thrower>(*v) ||
-      absl::get<Thrower>(*v) != Thrower(100)) {
-    return AssertionFailure() << "Variant should contain Thrower(100)";
-  }
-  v->emplace<ThrowerVec>({Thrower(100)});
-  if (!absl::holds_alternative<ThrowerVec>(*v) ||
-      absl::get<ThrowerVec>(*v)[0] != Thrower(100)) {
-    return AssertionFailure()
-           << "Variant should contain ThrowerVec{Thrower(100)}";
-  }
-  return AssertionSuccess();
-}
-
-template <typename... Args>
-Thrower ExpectedThrower(Args&&... args) {
-  return Thrower(42, args...);
-}
-
-ThrowerVec ExpectedThrowerVec() { return {Thrower(100), Thrower(200)}; }
-ThrowingVariant ValuelessByException() {
-  ThrowingVariant v;
-  ToValuelessByException(v);
-  return v;
-}
-ThrowingVariant WithThrower() { return Thrower(39); }
-ThrowingVariant WithThrowerVec() {
-  return ThrowerVec{Thrower(1), Thrower(2), Thrower(3)};
-}
-ThrowingVariant WithCopyNoThrow() { return CopyNothrow(39); }
-ThrowingVariant WithMoveNoThrow() { return MoveNothrow(39); }
-
-TEST(VariantExceptionSafetyTest, DefaultConstructor) {
-  TestThrowingCtor<ThrowingVariant>();
-}
-
-TEST(VariantExceptionSafetyTest, CopyConstructor) {
-  {
-    ThrowingVariant v(ExpectedThrower());
-    TestThrowingCtor<ThrowingVariant>(v);
-  }
-  {
-    ThrowingVariant v(ExpectedThrowerVec());
-    TestThrowingCtor<ThrowingVariant>(v);
-  }
-  {
-    ThrowingVariant v(ValuelessByException());
-    TestThrowingCtor<ThrowingVariant>(v);
-  }
-}
-
-TEST(VariantExceptionSafetyTest, MoveConstructor) {
-  {
-    ThrowingVariant v(ExpectedThrower());
-    TestThrowingCtor<ThrowingVariant>(std::move(v));
-  }
-  {
-    ThrowingVariant v(ExpectedThrowerVec());
-    TestThrowingCtor<ThrowingVariant>(std::move(v));
-  }
-  {
-    ThrowingVariant v(ValuelessByException());
-    TestThrowingCtor<ThrowingVariant>(std::move(v));
-  }
-}
-
-TEST(VariantExceptionSafetyTest, ValueConstructor) {
-  TestThrowingCtor<ThrowingVariant>(ExpectedThrower());
-  TestThrowingCtor<ThrowingVariant>(ExpectedThrowerVec());
-}
-
-TEST(VariantExceptionSafetyTest, InPlaceTypeConstructor) {
-  TestThrowingCtor<ThrowingVariant>(absl::in_place_type_t<Thrower>{},
-                                    ExpectedThrower());
-  TestThrowingCtor<ThrowingVariant>(absl::in_place_type_t<ThrowerVec>{},
-                                    ExpectedThrowerVec());
-}
-
-TEST(VariantExceptionSafetyTest, InPlaceIndexConstructor) {
-  TestThrowingCtor<ThrowingVariant>(absl::in_place_index_t<0>{},
-                                    ExpectedThrower());
-  TestThrowingCtor<ThrowingVariant>(absl::in_place_index_t<3>{},
-                                    ExpectedThrowerVec());
-}
-
-TEST(VariantExceptionSafetyTest, CopyAssign) {
-  // variant& operator=(const variant& rhs);
-  // Let j be rhs.index()
-  {
-    // - neither *this nor rhs holds a value
-    const ThrowingVariant rhs = ValuelessByException();
-    ThrowingVariant lhs = ValuelessByException();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = rhs; }));
-  }
-  {
-    // - *this holds a value but rhs does not
-    const ThrowingVariant rhs = ValuelessByException();
-    ThrowingVariant lhs = WithThrower();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = rhs; }));
-  }
-  // - index() == j
-  {
-    const ThrowingVariant rhs(ExpectedThrower());
-    auto tester =
-        MakeExceptionSafetyTester()
-            .WithInitialValue(WithThrower())
-            .WithOperation([&rhs](ThrowingVariant* lhs) { *lhs = rhs; });
-    EXPECT_TRUE(tester.WithContracts(VariantInvariants).Test());
-    EXPECT_FALSE(tester.WithContracts(strong_guarantee).Test());
-  }
-  {
-    const ThrowingVariant rhs(ExpectedThrowerVec());
-    auto tester =
-        MakeExceptionSafetyTester()
-            .WithInitialValue(WithThrowerVec())
-            .WithOperation([&rhs](ThrowingVariant* lhs) { *lhs = rhs; });
-    EXPECT_TRUE(tester.WithContracts(VariantInvariants).Test());
-    EXPECT_FALSE(tester.WithContracts(strong_guarantee).Test());
-  }
-  // libstdc++ std::variant has bugs on copy assignment regarding exception
-  // safety.
-#if !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-  // index() != j
-  // if is_nothrow_copy_constructible_v<Tj> or
-  // !is_nothrow_move_constructible<Tj> is true, equivalent to
-  // emplace<j>(get<j>(rhs))
-  {
-    // is_nothrow_copy_constructible_v<Tj> == true
-    // should not throw because emplace() invokes Tj's copy ctor
-    // which should not throw.
-    const ThrowingVariant rhs(CopyNothrow{});
-    ThrowingVariant lhs = WithThrower();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = rhs; }));
-  }
-  {
-    // is_nothrow_copy_constructible<Tj> == false &&
-    // is_nothrow_move_constructible<Tj> == false
-    // should provide basic guarantee because emplace() invokes Tj's copy ctor
-    // which may throw.
-    const ThrowingVariant rhs(ExpectedThrower());
-    auto tester =
-        MakeExceptionSafetyTester()
-            .WithInitialValue(WithCopyNoThrow())
-            .WithOperation([&rhs](ThrowingVariant* lhs) { *lhs = rhs; });
-    EXPECT_TRUE(tester
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* lhs) {
-                                     return lhs->valueless_by_exception();
-                                   })
-                    .Test());
-    EXPECT_FALSE(tester.WithContracts(strong_guarantee).Test());
-  }
-#endif  // !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-  {
-    // is_nothrow_copy_constructible_v<Tj> == false &&
-    // is_nothrow_move_constructible_v<Tj> == true
-    // should provide strong guarantee because it is equivalent to
-    // operator=(variant(rhs)) which creates a temporary then invoke the move
-    // ctor which shouldn't throw.
-    const ThrowingVariant rhs(MoveNothrow{});
-    EXPECT_TRUE(MakeExceptionSafetyTester()
-                    .WithInitialValue(WithThrower())
-                    .WithContracts(VariantInvariants, strong_guarantee)
-                    .Test([&rhs](ThrowingVariant* lhs) { *lhs = rhs; }));
-  }
-}
-
-TEST(VariantExceptionSafetyTest, MoveAssign) {
-  // variant& operator=(variant&& rhs);
-  // Let j be rhs.index()
-  {
-    // - neither *this nor rhs holds a value
-    ThrowingVariant rhs = ValuelessByException();
-    ThrowingVariant lhs = ValuelessByException();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = std::move(rhs); }));
-  }
-  {
-    // - *this holds a value but rhs does not
-    ThrowingVariant rhs = ValuelessByException();
-    ThrowingVariant lhs = WithThrower();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = std::move(rhs); }));
-  }
-  {
-    // - index() == j
-    // assign get<j>(std::move(rhs)) to the value contained in *this.
-    // If an exception is thrown during call to Tj's move assignment, the state
-    // of the contained value is as defined by the exception safety guarantee of
-    // Tj's move assignment; index() will be j.
-    ThrowingVariant rhs(ExpectedThrower());
-    size_t j = rhs.index();
-    // Since Thrower's move assignment has basic guarantee, so should variant's.
-    auto tester = MakeExceptionSafetyTester()
-                      .WithInitialValue(WithThrower())
-                      .WithOperation([&](ThrowingVariant* lhs) {
-                        auto copy = rhs;
-                        *lhs = std::move(copy);
-                      });
-    EXPECT_TRUE(tester
-                    .WithContracts(
-                        VariantInvariants,
-                        [&](ThrowingVariant* lhs) { return lhs->index() == j; })
-                    .Test());
-    EXPECT_FALSE(tester.WithContracts(strong_guarantee).Test());
-  }
-  {
-    // libstdc++ introduced a regression between 2018-09-25 and 2019-01-06.
-    // The fix is targeted for gcc-9.
-    // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87431#c7
-    // https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=267614
-#if !(defined(ABSL_USES_STD_VARIANT) && \
-      defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE == 8)
-    // - otherwise (index() != j), equivalent to
-    // emplace<j>(get<j>(std::move(rhs)))
-    // - If an exception is thrown during the call to Tj's move construction
-    // (with j being rhs.index()), the variant will hold no value.
-    ThrowingVariant rhs(CopyNothrow{});
-    EXPECT_TRUE(MakeExceptionSafetyTester()
-                    .WithInitialValue(WithThrower())
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* lhs) {
-                                     return lhs->valueless_by_exception();
-                                   })
-                    .Test([&](ThrowingVariant* lhs) {
-                      auto copy = rhs;
-                      *lhs = std::move(copy);
-                    }));
-#endif  // !(defined(ABSL_USES_STD_VARIANT) &&
-        //   defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE == 8)
-  }
-}
-
-TEST(VariantExceptionSafetyTest, ValueAssign) {
-  // template<class T> variant& operator=(T&& t);
-  // Let Tj be the type that is selected by overload resolution to be assigned.
-  {
-    // If *this holds a Tj, assigns std::forward<T>(t) to the value contained in
-    // *this. If  an exception is thrown during the assignment of
-    // std::forward<T>(t) to the value contained in *this, the state of the
-    // contained value and t are as defined by the exception safety guarantee of
-    // the assignment expression; valueless_by_exception() will be false.
-    // Since Thrower's copy/move assignment has basic guarantee, so should
-    // variant's.
-    Thrower rhs = ExpectedThrower();
-    // copy assign
-    auto copy_tester =
-        MakeExceptionSafetyTester()
-            .WithInitialValue(WithThrower())
-            .WithOperation([rhs](ThrowingVariant* lhs) { *lhs = rhs; });
-    EXPECT_TRUE(copy_tester
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* lhs) {
-                                     return !lhs->valueless_by_exception();
-                                   })
-                    .Test());
-    EXPECT_FALSE(copy_tester.WithContracts(strong_guarantee).Test());
-    // move assign
-    auto move_tester = MakeExceptionSafetyTester()
-                           .WithInitialValue(WithThrower())
-                           .WithOperation([&](ThrowingVariant* lhs) {
-                             auto copy = rhs;
-                             *lhs = std::move(copy);
-                           });
-    EXPECT_TRUE(move_tester
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* lhs) {
-                                     return !lhs->valueless_by_exception();
-                                   })
-                    .Test());
-
-    EXPECT_FALSE(move_tester.WithContracts(strong_guarantee).Test());
-  }
-  // Otherwise (*this holds something else), if is_nothrow_constructible_v<Tj,
-  // T> || !is_nothrow_move_constructible_v<Tj> is true, equivalent to
-  // emplace<j>(std::forward<T>(t)).
-  // We simplify the test by letting T = `const Tj&`  or `Tj&&`, so we can reuse
-  // the CopyNothrow and MoveNothrow types.
-
-  // if is_nothrow_constructible_v<Tj, T>
-  // (i.e. is_nothrow_copy/move_constructible_v<Tj>) is true, emplace() just
-  // invokes the copy/move constructor and it should not throw.
-  {
-    const CopyNothrow rhs;
-    ThrowingVariant lhs = WithThrower();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = rhs; }));
-  }
-  {
-    MoveNothrow rhs;
-    ThrowingVariant lhs = WithThrower();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs = std::move(rhs); }));
-  }
-  // if is_nothrow_constructible_v<Tj, T> == false &&
-  // is_nothrow_move_constructible<Tj> == false
-  // emplace() invokes the copy/move constructor which may throw so it should
-  // provide basic guarantee and variant object might not hold a value.
-  {
-    Thrower rhs = ExpectedThrower();
-    // copy
-    auto copy_tester =
-        MakeExceptionSafetyTester()
-            .WithInitialValue(WithCopyNoThrow())
-            .WithOperation([&rhs](ThrowingVariant* lhs) { *lhs = rhs; });
-    EXPECT_TRUE(copy_tester
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* lhs) {
-                                     return lhs->valueless_by_exception();
-                                   })
-                    .Test());
-    EXPECT_FALSE(copy_tester.WithContracts(strong_guarantee).Test());
-    // move
-    auto move_tester = MakeExceptionSafetyTester()
-                           .WithInitialValue(WithCopyNoThrow())
-                           .WithOperation([](ThrowingVariant* lhs) {
-                             *lhs = ExpectedThrower(testing::nothrow_ctor);
-                           });
-    EXPECT_TRUE(move_tester
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* lhs) {
-                                     return lhs->valueless_by_exception();
-                                   })
-                    .Test());
-    EXPECT_FALSE(move_tester.WithContracts(strong_guarantee).Test());
-  }
-  // Otherwise (if is_nothrow_constructible_v<Tj, T> == false &&
-  // is_nothrow_move_constructible<Tj> == true),
-  // equivalent to operator=(variant(std::forward<T>(t)))
-  // This should have strong guarantee because it creates a temporary variant
-  // and operator=(variant&&) invokes Tj's move ctor which doesn't throw.
-  // libstdc++ std::variant has bugs on conversion assignment regarding
-  // exception safety.
-#if !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-  {
-    MoveNothrow rhs;
-    EXPECT_TRUE(MakeExceptionSafetyTester()
-                    .WithInitialValue(WithThrower())
-                    .WithContracts(VariantInvariants, strong_guarantee)
-                    .Test([&rhs](ThrowingVariant* lhs) { *lhs = rhs; }));
-  }
-#endif  // !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-}
-
-TEST(VariantExceptionSafetyTest, Emplace) {
-  // If an exception during the initialization of the contained value, the
-  // variant might not hold a value. The standard requires emplace() to provide
-  // only basic guarantee.
-  {
-    Thrower args = ExpectedThrower();
-    auto tester = MakeExceptionSafetyTester()
-                      .WithInitialValue(WithThrower())
-                      .WithOperation([&args](ThrowingVariant* v) {
-                        v->emplace<Thrower>(args);
-                      });
-    EXPECT_TRUE(tester
-                    .WithContracts(VariantInvariants,
-                                   [](ThrowingVariant* v) {
-                                     return v->valueless_by_exception();
-                                   })
-                    .Test());
-    EXPECT_FALSE(tester.WithContracts(strong_guarantee).Test());
-  }
-}
-
-TEST(VariantExceptionSafetyTest, Swap) {
-  // if both are valueless_by_exception(), no effect
-  {
-    ThrowingVariant rhs = ValuelessByException();
-    ThrowingVariant lhs = ValuelessByException();
-    EXPECT_TRUE(TestNothrowOp([&]() { lhs.swap(rhs); }));
-  }
-  // if index() == rhs.index(), calls swap(get<i>(*this), get<i>(rhs))
-  // where i is index().
-  {
-    ThrowingVariant rhs = ExpectedThrower();
-    EXPECT_TRUE(MakeExceptionSafetyTester()
-                    .WithInitialValue(WithThrower())
-                    .WithContracts(VariantInvariants)
-                    .Test([&](ThrowingVariant* lhs) {
-                      auto copy = rhs;
-                      lhs->swap(copy);
-                    }));
-  }
-  // Otherwise, exchanges the value of rhs and *this. The exception safety
-  // involves variant in moved-from state which is not specified in the
-  // standard, and since swap is 3-step it's impossible for it to provide a
-  // overall strong guarantee. So, we are only checking basic guarantee here.
-  {
-    ThrowingVariant rhs = ExpectedThrower();
-    EXPECT_TRUE(MakeExceptionSafetyTester()
-                    .WithInitialValue(WithCopyNoThrow())
-                    .WithContracts(VariantInvariants)
-                    .Test([&](ThrowingVariant* lhs) {
-                      auto copy = rhs;
-                      lhs->swap(copy);
-                    }));
-  }
-  {
-    ThrowingVariant rhs = ExpectedThrower();
-    EXPECT_TRUE(MakeExceptionSafetyTester()
-                    .WithInitialValue(WithCopyNoThrow())
-                    .WithContracts(VariantInvariants)
-                    .Test([&](ThrowingVariant* lhs) {
-                      auto copy = rhs;
-                      copy.swap(*lhs);
-                    }));
-  }
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // !defined(ABSL_INTERNAL_MSVC_2017_DBG_MODE)
-
-#endif  // #if !defined(ABSL_USES_STD_VARIANT) && defined(ABSL_HAVE_EXCEPTIONS)
diff --git a/third_party/abseil/absl/types/variant_test.cc b/third_party/abseil/absl/types/variant_test.cc
deleted file mode 100644
index cf23733..0000000
--- a/third_party/abseil/absl/types/variant_test.cc
+++ /dev/null
@@ -1,2718 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Unit tests for the variant template. The 'is' and 'IsEmpty' methods
-// of variant are not explicitly tested because they are used repeatedly
-// in building other tests. All other public variant methods should have
-// explicit tests.
-
-#include "absl/types/variant.h"
-
-// This test is a no-op when absl::variant is an alias for std::variant.
-#if !defined(ABSL_USES_STD_VARIANT)
-
-#include <algorithm>
-#include <cstddef>
-#include <functional>
-#include <initializer_list>
-#include <memory>
-#include <ostream>
-#include <queue>
-#include <type_traits>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/config.h"
-#include "absl/base/port.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-#include "absl/strings/string_view.h"
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-#define ABSL_VARIANT_TEST_EXPECT_FAIL(expr, exception_t, text) \
-  EXPECT_THROW(expr, exception_t)
-
-#else
-
-#define ABSL_VARIANT_TEST_EXPECT_FAIL(expr, exception_t, text) \
-  EXPECT_DEATH_IF_SUPPORTED(expr, text)
-
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-#define ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(...)                 \
-  ABSL_VARIANT_TEST_EXPECT_FAIL((void)(__VA_ARGS__), absl::bad_variant_access, \
-                                "Bad variant access")
-
-struct Hashable {};
-
-namespace std {
-template <>
-struct hash<Hashable> {
-  size_t operator()(const Hashable&);
-};
-}  // namespace std
-
-struct NonHashable {};
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace {
-
-using ::testing::DoubleEq;
-using ::testing::Pointee;
-using ::testing::VariantWith;
-
-struct MoveCanThrow {
-  MoveCanThrow() : v(0) {}
-  MoveCanThrow(int v) : v(v) {}  // NOLINT(runtime/explicit)
-  MoveCanThrow(const MoveCanThrow& other) : v(other.v) {}
-  MoveCanThrow& operator=(const MoveCanThrow& /*other*/) { return *this; }
-  int v;
-};
-
-bool operator==(MoveCanThrow lhs, MoveCanThrow rhs) { return lhs.v == rhs.v; }
-bool operator!=(MoveCanThrow lhs, MoveCanThrow rhs) { return lhs.v != rhs.v; }
-bool operator<(MoveCanThrow lhs, MoveCanThrow rhs) { return lhs.v < rhs.v; }
-bool operator<=(MoveCanThrow lhs, MoveCanThrow rhs) { return lhs.v <= rhs.v; }
-bool operator>=(MoveCanThrow lhs, MoveCanThrow rhs) { return lhs.v >= rhs.v; }
-bool operator>(MoveCanThrow lhs, MoveCanThrow rhs) { return lhs.v > rhs.v; }
-
-// This helper class allows us to determine if it was swapped with std::swap()
-// or with its friend swap() function.
-struct SpecialSwap {
-  explicit SpecialSwap(int i) : i(i) {}
-  friend void swap(SpecialSwap& a, SpecialSwap& b) {
-    a.special_swap = b.special_swap = true;
-    std::swap(a.i, b.i);
-  }
-  bool operator==(SpecialSwap other) const { return i == other.i; }
-  int i;
-  bool special_swap = false;
-};
-
-struct MoveOnlyWithListConstructor {
-  MoveOnlyWithListConstructor() = default;
-  explicit MoveOnlyWithListConstructor(std::initializer_list<int> /*ilist*/,
-                                       int value)
-      : value(value) {}
-  MoveOnlyWithListConstructor(MoveOnlyWithListConstructor&&) = default;
-  MoveOnlyWithListConstructor& operator=(MoveOnlyWithListConstructor&&) =
-      default;
-
-  int value = 0;
-};
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-struct ConversionException {};
-
-template <class T>
-struct ExceptionOnConversion {
-  operator T() const {  // NOLINT(runtime/explicit)
-    throw ConversionException();
-  }
-};
-
-// Forces a variant into the valueless by exception state.
-template <class H, class... T>
-void ToValuelessByException(absl::variant<H, T...>& v) {  // NOLINT
-  try {
-    v.template emplace<0>(ExceptionOnConversion<H>());
-  } catch (ConversionException& /*e*/) {
-    // This space intentionally left blank.
-  }
-}
-
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-// An indexed sequence of distinct structures holding a single
-// value of type T
-template<typename T, size_t N>
-struct ValueHolder {
-  explicit ValueHolder(const T& x) : value(x) {}
-  typedef T value_type;
-  value_type value;
-  static const size_t kIndex = N;
-};
-template<typename T, size_t N>
-const size_t ValueHolder<T, N>::kIndex;
-
-// The following three functions make ValueHolder compatible with
-// EXPECT_EQ and EXPECT_NE
-template<typename T, size_t N>
-inline bool operator==(const ValueHolder<T, N>& left,
-                       const ValueHolder<T, N>& right) {
-  return left.value == right.value;
-}
-
-template<typename T, size_t N>
-inline bool operator!=(const ValueHolder<T, N>& left,
-                       const ValueHolder<T, N>& right) {
-  return left.value != right.value;
-}
-
-template<typename T, size_t N>
-inline std::ostream& operator<<(
-    std::ostream& stream, const ValueHolder<T, N>& object) {
-  return stream << object.value;
-}
-
-// Makes a variant holding twelve uniquely typed T wrappers.
-template<typename T>
-struct VariantFactory {
-  typedef variant<ValueHolder<T, 1>, ValueHolder<T, 2>, ValueHolder<T, 3>,
-                  ValueHolder<T, 4>>
-      Type;
-};
-
-// A typelist in 1:1 with VariantFactory, to use type driven unit tests.
-typedef ::testing::Types<ValueHolder<size_t, 1>, ValueHolder<size_t, 2>,
-                         ValueHolder<size_t, 3>,
-                         ValueHolder<size_t, 4>> VariantTypes;
-
-// Increments the provided counter pointer in the destructor
-struct IncrementInDtor {
-  explicit IncrementInDtor(int* counter) : counter(counter) {}
-  ~IncrementInDtor() { *counter += 1; }
-  int* counter;
-};
-
-struct IncrementInDtorCopyCanThrow {
-  explicit IncrementInDtorCopyCanThrow(int* counter) : counter(counter) {}
-  IncrementInDtorCopyCanThrow(IncrementInDtorCopyCanThrow&& other) noexcept =
-      default;
-  IncrementInDtorCopyCanThrow(const IncrementInDtorCopyCanThrow& other)
-      : counter(other.counter) {}
-  IncrementInDtorCopyCanThrow& operator=(
-      IncrementInDtorCopyCanThrow&&) noexcept = default;
-  IncrementInDtorCopyCanThrow& operator=(
-      IncrementInDtorCopyCanThrow const& other) {
-    counter = other.counter;
-    return *this;
-  }
-  ~IncrementInDtorCopyCanThrow() { *counter += 1; }
-  int* counter;
-};
-
-// This is defined so operator== for ValueHolder<IncrementInDtor> will
-// return true if two IncrementInDtor objects increment the same
-// counter
-inline bool operator==(const IncrementInDtor& left,
-                       const IncrementInDtor& right) {
-  return left.counter == right.counter;
-}
-
-// This is defined so EXPECT_EQ can work with IncrementInDtor
-inline std::ostream& operator<<(
-    std::ostream& stream, const IncrementInDtor& object) {
-  return stream << object.counter;
-}
-
-// A class that can be copied, but not assigned.
-class CopyNoAssign {
- public:
-  explicit CopyNoAssign(int value) : foo(value) {}
-  CopyNoAssign(const CopyNoAssign& other) : foo(other.foo) {}
-  int foo;
- private:
-  const CopyNoAssign& operator=(const CopyNoAssign&);
-};
-
-// A class that can neither be copied nor assigned. We provide
-// overloads for the constructor with up to four parameters so we can
-// test the overloads of variant::emplace.
-class NonCopyable {
- public:
-  NonCopyable()
-      : value(0) {}
-  explicit NonCopyable(int value1)
-      : value(value1) {}
-
-  NonCopyable(int value1, int value2)
-      : value(value1 + value2) {}
-
-  NonCopyable(int value1, int value2, int value3)
-      : value(value1 + value2 + value3) {}
-
-  NonCopyable(int value1, int value2, int value3, int value4)
-      : value(value1 + value2 + value3 + value4) {}
-  NonCopyable(const NonCopyable&) = delete;
-  NonCopyable& operator=(const NonCopyable&) = delete;
-  int value;
-};
-
-// A typed test and typed test case over the VariantTypes typelist,
-// from which we derive a number of tests that will execute for one of
-// each type.
-template <typename T>
-class VariantTypesTest : public ::testing::Test {};
-TYPED_TEST_SUITE(VariantTypesTest, VariantTypes);
-
-////////////////////
-// [variant.ctor] //
-////////////////////
-
-struct NonNoexceptDefaultConstructible {
-  NonNoexceptDefaultConstructible() {}
-  int value = 5;
-};
-
-struct NonDefaultConstructible {
-  NonDefaultConstructible() = delete;
-};
-
-TEST(VariantTest, TestDefaultConstructor) {
-  {
-    using X = variant<int>;
-    constexpr variant<int> x{};
-    ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
-    EXPECT_EQ(0, absl::get<0>(x));
-    EXPECT_TRUE(std::is_nothrow_default_constructible<X>::value);
-  }
-
-  {
-    using X = variant<NonNoexceptDefaultConstructible>;
-    X x{};
-    ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
-    EXPECT_EQ(5, absl::get<0>(x).value);
-    EXPECT_FALSE(std::is_nothrow_default_constructible<X>::value);
-  }
-
-  {
-    using X = variant<int, NonNoexceptDefaultConstructible>;
-    X x{};
-    ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
-    EXPECT_EQ(0, absl::get<0>(x));
-    EXPECT_TRUE(std::is_nothrow_default_constructible<X>::value);
-  }
-
-  {
-    using X = variant<NonNoexceptDefaultConstructible, int>;
-    X x{};
-    ASSERT_FALSE(x.valueless_by_exception());
-    ASSERT_EQ(0, x.index());
-    EXPECT_EQ(5, absl::get<0>(x).value);
-    EXPECT_FALSE(std::is_nothrow_default_constructible<X>::value);
-  }
-  EXPECT_FALSE(
-      std::is_default_constructible<variant<NonDefaultConstructible>>::value);
-  EXPECT_FALSE((std::is_default_constructible<
-                variant<NonDefaultConstructible, int>>::value));
-  EXPECT_TRUE((std::is_default_constructible<
-               variant<int, NonDefaultConstructible>>::value));
-}
-
-// Test that for each slot, copy constructing a variant with that type
-// produces a sensible object that correctly reports its type, and
-// that copies the provided value.
-TYPED_TEST(VariantTypesTest, TestCopyCtor) {
-  typedef typename VariantFactory<typename TypeParam::value_type>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  using value_type2 = absl::variant_alternative_t<1, Variant>;
-  using value_type3 = absl::variant_alternative_t<2, Variant>;
-  using value_type4 = absl::variant_alternative_t<3, Variant>;
-  const TypeParam value(TypeParam::kIndex);
-  Variant original(value);
-  Variant copied(original);
-  EXPECT_TRUE(absl::holds_alternative<value_type1>(copied) ||
-              TypeParam::kIndex != 1);
-  EXPECT_TRUE(absl::holds_alternative<value_type2>(copied) ||
-              TypeParam::kIndex != 2);
-  EXPECT_TRUE(absl::holds_alternative<value_type3>(copied) ||
-              TypeParam::kIndex != 3);
-  EXPECT_TRUE(absl::holds_alternative<value_type4>(copied) ||
-              TypeParam::kIndex != 4);
-  EXPECT_TRUE((absl::get_if<value_type1>(&original) ==
-               absl::get_if<value_type1>(&copied)) ||
-              TypeParam::kIndex == 1);
-  EXPECT_TRUE((absl::get_if<value_type2>(&original) ==
-               absl::get_if<value_type2>(&copied)) ||
-              TypeParam::kIndex == 2);
-  EXPECT_TRUE((absl::get_if<value_type3>(&original) ==
-               absl::get_if<value_type3>(&copied)) ||
-              TypeParam::kIndex == 3);
-  EXPECT_TRUE((absl::get_if<value_type4>(&original) ==
-               absl::get_if<value_type4>(&copied)) ||
-              TypeParam::kIndex == 4);
-  EXPECT_TRUE((absl::get_if<value_type1>(&original) ==
-               absl::get_if<value_type1>(&copied)) ||
-              TypeParam::kIndex == 1);
-  EXPECT_TRUE((absl::get_if<value_type2>(&original) ==
-               absl::get_if<value_type2>(&copied)) ||
-              TypeParam::kIndex == 2);
-  EXPECT_TRUE((absl::get_if<value_type3>(&original) ==
-               absl::get_if<value_type3>(&copied)) ||
-              TypeParam::kIndex == 3);
-  EXPECT_TRUE((absl::get_if<value_type4>(&original) ==
-               absl::get_if<value_type4>(&copied)) ||
-              TypeParam::kIndex == 4);
-  const TypeParam* ovalptr = absl::get_if<TypeParam>(&original);
-  const TypeParam* cvalptr = absl::get_if<TypeParam>(&copied);
-  ASSERT_TRUE(ovalptr != nullptr);
-  ASSERT_TRUE(cvalptr != nullptr);
-  EXPECT_EQ(*ovalptr, *cvalptr);
-  TypeParam* mutable_ovalptr = absl::get_if<TypeParam>(&original);
-  TypeParam* mutable_cvalptr = absl::get_if<TypeParam>(&copied);
-  ASSERT_TRUE(mutable_ovalptr != nullptr);
-  ASSERT_TRUE(mutable_cvalptr != nullptr);
-  EXPECT_EQ(*mutable_ovalptr, *mutable_cvalptr);
-}
-
-template <class>
-struct MoveOnly {
-  MoveOnly() = default;
-  explicit MoveOnly(int value) : value(value) {}
-  MoveOnly(MoveOnly&&) = default;
-  MoveOnly& operator=(MoveOnly&&) = default;
-  int value = 5;
-};
-
-TEST(VariantTest, TestMoveConstruct) {
-  using V = variant<MoveOnly<class A>, MoveOnly<class B>, MoveOnly<class C>>;
-
-  V v(in_place_index<1>, 10);
-  V v2 = absl::move(v);
-  EXPECT_EQ(10, absl::get<1>(v2).value);
-}
-
-// Used internally to emulate missing triviality traits for tests.
-template <class T>
-union SingleUnion {
-  T member;
-};
-
-// NOTE: These don't work with types that can't be union members.
-//       They are just for testing.
-template <class T>
-struct is_trivially_move_constructible
-    : std::is_move_constructible<SingleUnion<T>>::type {};
-
-template <class T>
-struct is_trivially_move_assignable
-    : absl::is_move_assignable<SingleUnion<T>>::type {};
-
-TEST(VariantTest, NothrowMoveConstructible) {
-  // Verify that variant is nothrow move constructible iff its template
-  // arguments are.
-  using U = std::unique_ptr<int>;
-  struct E {
-    E(E&&) {}
-  };
-  static_assert(std::is_nothrow_move_constructible<variant<U>>::value, "");
-  static_assert(std::is_nothrow_move_constructible<variant<U, int>>::value, "");
-  static_assert(!std::is_nothrow_move_constructible<variant<U, E>>::value, "");
-}
-
-// Test that for each slot, constructing a variant with that type
-// produces a sensible object that correctly reports its type, and
-// that copies the provided value.
-TYPED_TEST(VariantTypesTest, TestValueCtor) {
-  typedef typename VariantFactory<typename TypeParam::value_type>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  using value_type2 = absl::variant_alternative_t<1, Variant>;
-  using value_type3 = absl::variant_alternative_t<2, Variant>;
-  using value_type4 = absl::variant_alternative_t<3, Variant>;
-  const TypeParam value(TypeParam::kIndex);
-  Variant v(value);
-  EXPECT_TRUE(absl::holds_alternative<value_type1>(v) ||
-              TypeParam::kIndex != 1);
-  EXPECT_TRUE(absl::holds_alternative<value_type2>(v) ||
-              TypeParam::kIndex != 2);
-  EXPECT_TRUE(absl::holds_alternative<value_type3>(v) ||
-              TypeParam::kIndex != 3);
-  EXPECT_TRUE(absl::holds_alternative<value_type4>(v) ||
-              TypeParam::kIndex != 4);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type1>(&v) ||
-              TypeParam::kIndex != 1);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type2>(&v) ||
-              TypeParam::kIndex != 2);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type3>(&v) ||
-              TypeParam::kIndex != 3);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type4>(&v) ||
-              TypeParam::kIndex != 4);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type1>(&v) ||
-              TypeParam::kIndex != 1);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type2>(&v) ||
-              TypeParam::kIndex != 2);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type3>(&v) ||
-              TypeParam::kIndex != 3);
-  EXPECT_TRUE(nullptr != absl::get_if<value_type4>(&v) ||
-              TypeParam::kIndex != 4);
-  const TypeParam* valptr = absl::get_if<TypeParam>(&v);
-  ASSERT_TRUE(nullptr != valptr);
-  EXPECT_EQ(value.value, valptr->value);
-  const TypeParam* mutable_valptr = absl::get_if<TypeParam>(&v);
-  ASSERT_TRUE(nullptr != mutable_valptr);
-  EXPECT_EQ(value.value, mutable_valptr->value);
-}
-
-TEST(VariantTest, AmbiguousValueConstructor) {
-  EXPECT_FALSE((std::is_convertible<int, absl::variant<int, int>>::value));
-  EXPECT_FALSE((std::is_constructible<absl::variant<int, int>, int>::value));
-}
-
-TEST(VariantTest, InPlaceType) {
-  using Var = variant<int, std::string, NonCopyable, std::vector<int>>;
-
-  Var v1(in_place_type_t<int>(), 7);
-  ASSERT_TRUE(absl::holds_alternative<int>(v1));
-  EXPECT_EQ(7, absl::get<int>(v1));
-
-  Var v2(in_place_type_t<std::string>(), "ABC");
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
-  EXPECT_EQ("ABC", absl::get<std::string>(v2));
-
-  Var v3(in_place_type_t<std::string>(), "ABC", 2);
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
-  EXPECT_EQ("AB", absl::get<std::string>(v3));
-
-  Var v4(in_place_type_t<NonCopyable>{});
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v4));
-
-  Var v5(in_place_type_t<std::vector<int>>(), {1, 2, 3});
-  ASSERT_TRUE(absl::holds_alternative<std::vector<int>>(v5));
-  EXPECT_THAT(absl::get<std::vector<int>>(v5), ::testing::ElementsAre(1, 2, 3));
-}
-
-TEST(VariantTest, InPlaceTypeVariableTemplate) {
-  using Var = variant<int, std::string, NonCopyable, std::vector<int>>;
-
-  Var v1(in_place_type<int>, 7);
-  ASSERT_TRUE(absl::holds_alternative<int>(v1));
-  EXPECT_EQ(7, absl::get<int>(v1));
-
-  Var v2(in_place_type<std::string>, "ABC");
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
-  EXPECT_EQ("ABC", absl::get<std::string>(v2));
-
-  Var v3(in_place_type<std::string>, "ABC", 2);
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
-  EXPECT_EQ("AB", absl::get<std::string>(v3));
-
-  Var v4(in_place_type<NonCopyable>);
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v4));
-
-  Var v5(in_place_type<std::vector<int>>, {1, 2, 3});
-  ASSERT_TRUE(absl::holds_alternative<std::vector<int>>(v5));
-  EXPECT_THAT(absl::get<std::vector<int>>(v5), ::testing::ElementsAre(1, 2, 3));
-}
-
-TEST(VariantTest, InPlaceTypeInitializerList) {
-  using Var =
-      variant<int, std::string, NonCopyable, MoveOnlyWithListConstructor>;
-
-  Var v1(in_place_type_t<MoveOnlyWithListConstructor>(), {1, 2, 3, 4, 5}, 6);
-  ASSERT_TRUE(absl::holds_alternative<MoveOnlyWithListConstructor>(v1));
-  EXPECT_EQ(6, absl::get<MoveOnlyWithListConstructor>(v1).value);
-}
-
-TEST(VariantTest, InPlaceTypeInitializerListVariabletemplate) {
-  using Var =
-      variant<int, std::string, NonCopyable, MoveOnlyWithListConstructor>;
-
-  Var v1(in_place_type<MoveOnlyWithListConstructor>, {1, 2, 3, 4, 5}, 6);
-  ASSERT_TRUE(absl::holds_alternative<MoveOnlyWithListConstructor>(v1));
-  EXPECT_EQ(6, absl::get<MoveOnlyWithListConstructor>(v1).value);
-}
-
-TEST(VariantTest, InPlaceIndex) {
-  using Var = variant<int, std::string, NonCopyable, std::vector<int>>;
-
-  Var v1(in_place_index_t<0>(), 7);
-  ASSERT_TRUE(absl::holds_alternative<int>(v1));
-  EXPECT_EQ(7, absl::get<int>(v1));
-
-  Var v2(in_place_index_t<1>(), "ABC");
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
-  EXPECT_EQ("ABC", absl::get<std::string>(v2));
-
-  Var v3(in_place_index_t<1>(), "ABC", 2);
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
-  EXPECT_EQ("AB", absl::get<std::string>(v3));
-
-  Var v4(in_place_index_t<2>{});
-  EXPECT_TRUE(absl::holds_alternative<NonCopyable>(v4));
-
-  // Verify that a variant with only non-copyables can still be constructed.
-  EXPECT_TRUE(absl::holds_alternative<NonCopyable>(
-      variant<NonCopyable>(in_place_index_t<0>{})));
-
-  Var v5(in_place_index_t<3>(), {1, 2, 3});
-  ASSERT_TRUE(absl::holds_alternative<std::vector<int>>(v5));
-  EXPECT_THAT(absl::get<std::vector<int>>(v5), ::testing::ElementsAre(1, 2, 3));
-}
-
-TEST(VariantTest, InPlaceIndexVariableTemplate) {
-  using Var = variant<int, std::string, NonCopyable, std::vector<int>>;
-
-  Var v1(in_place_index<0>, 7);
-  ASSERT_TRUE(absl::holds_alternative<int>(v1));
-  EXPECT_EQ(7, absl::get<int>(v1));
-
-  Var v2(in_place_index<1>, "ABC");
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v2));
-  EXPECT_EQ("ABC", absl::get<std::string>(v2));
-
-  Var v3(in_place_index<1>, "ABC", 2);
-  ASSERT_TRUE(absl::holds_alternative<std::string>(v3));
-  EXPECT_EQ("AB", absl::get<std::string>(v3));
-
-  Var v4(in_place_index<2>);
-  EXPECT_TRUE(absl::holds_alternative<NonCopyable>(v4));
-
-  // Verify that a variant with only non-copyables can still be constructed.
-  EXPECT_TRUE(absl::holds_alternative<NonCopyable>(
-      variant<NonCopyable>(in_place_index<0>)));
-
-  Var v5(in_place_index<3>, {1, 2, 3});
-  ASSERT_TRUE(absl::holds_alternative<std::vector<int>>(v5));
-  EXPECT_THAT(absl::get<std::vector<int>>(v5), ::testing::ElementsAre(1, 2, 3));
-}
-
-TEST(VariantTest, InPlaceIndexInitializerList) {
-  using Var =
-      variant<int, std::string, NonCopyable, MoveOnlyWithListConstructor>;
-
-  Var v1(in_place_index_t<3>(), {1, 2, 3, 4, 5}, 6);
-  ASSERT_TRUE(absl::holds_alternative<MoveOnlyWithListConstructor>(v1));
-  EXPECT_EQ(6, absl::get<MoveOnlyWithListConstructor>(v1).value);
-}
-
-TEST(VariantTest, InPlaceIndexInitializerListVariableTemplate) {
-  using Var =
-      variant<int, std::string, NonCopyable, MoveOnlyWithListConstructor>;
-
-  Var v1(in_place_index<3>, {1, 2, 3, 4, 5}, 6);
-  ASSERT_TRUE(absl::holds_alternative<MoveOnlyWithListConstructor>(v1));
-  EXPECT_EQ(6, absl::get<MoveOnlyWithListConstructor>(v1).value);
-}
-
-////////////////////
-// [variant.dtor] //
-////////////////////
-
-// Make sure that the destructor destroys the contained value
-TEST(VariantTest, TestDtor) {
-  typedef VariantFactory<IncrementInDtor>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  using value_type2 = absl::variant_alternative_t<1, Variant>;
-  using value_type3 = absl::variant_alternative_t<2, Variant>;
-  using value_type4 = absl::variant_alternative_t<3, Variant>;
-  int counter = 0;
-  IncrementInDtor counter_adjuster(&counter);
-  EXPECT_EQ(0, counter);
-
-  value_type1 value1(counter_adjuster);
-  { Variant object(value1); }
-  EXPECT_EQ(1, counter);
-
-  value_type2 value2(counter_adjuster);
-  { Variant object(value2); }
-  EXPECT_EQ(2, counter);
-
-  value_type3 value3(counter_adjuster);
-  { Variant object(value3); }
-  EXPECT_EQ(3, counter);
-
-  value_type4 value4(counter_adjuster);
-  { Variant object(value4); }
-  EXPECT_EQ(4, counter);
-}
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-// See comment in absl/base/config.h
-#if defined(ABSL_INTERNAL_MSVC_2017_DBG_MODE)
-TEST(VariantTest, DISABLED_TestDtorValuelessByException)
-#else
-// Test destruction when in the valueless_by_exception state.
-TEST(VariantTest, TestDtorValuelessByException)
-#endif
-{
-  int counter = 0;
-  IncrementInDtor counter_adjuster(&counter);
-
-  {
-    using Variant = VariantFactory<IncrementInDtor>::Type;
-
-    Variant v(in_place_index<0>, counter_adjuster);
-    EXPECT_EQ(0, counter);
-
-    ToValuelessByException(v);
-    ASSERT_TRUE(v.valueless_by_exception());
-    EXPECT_EQ(1, counter);
-  }
-  EXPECT_EQ(1, counter);
-}
-
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-//////////////////////
-// [variant.assign] //
-//////////////////////
-
-// Test that self-assignment doesn't destroy the current value
-TEST(VariantTest, TestSelfAssignment) {
-  typedef VariantFactory<IncrementInDtor>::Type Variant;
-  int counter = 0;
-  IncrementInDtor counter_adjuster(&counter);
-  absl::variant_alternative_t<0, Variant> value(counter_adjuster);
-  Variant object(value);
-  object.operator=(object);
-  EXPECT_EQ(0, counter);
-
-  // A string long enough that it's likely to defeat any inline representation
-  // optimization.
-  const std::string long_str(128, 'a');
-
-  std::string foo = long_str;
-  foo = *&foo;
-  EXPECT_EQ(long_str, foo);
-
-  variant<int, std::string> so = long_str;
-  ASSERT_EQ(1, so.index());
-  EXPECT_EQ(long_str, absl::get<1>(so));
-  so = *&so;
-
-  ASSERT_EQ(1, so.index());
-  EXPECT_EQ(long_str, absl::get<1>(so));
-}
-
-// Test that assigning a variant<..., T, ...> to a variant<..., T, ...> produces
-// a variant<..., T, ...> with the correct value.
-TYPED_TEST(VariantTypesTest, TestAssignmentCopiesValueSameTypes) {
-  typedef typename VariantFactory<typename TypeParam::value_type>::Type Variant;
-  const TypeParam value(TypeParam::kIndex);
-  const Variant source(value);
-  Variant target(TypeParam(value.value + 1));
-  ASSERT_TRUE(absl::holds_alternative<TypeParam>(source));
-  ASSERT_TRUE(absl::holds_alternative<TypeParam>(target));
-  ASSERT_NE(absl::get<TypeParam>(source), absl::get<TypeParam>(target));
-  target = source;
-  ASSERT_TRUE(absl::holds_alternative<TypeParam>(source));
-  ASSERT_TRUE(absl::holds_alternative<TypeParam>(target));
-  EXPECT_EQ(absl::get<TypeParam>(source), absl::get<TypeParam>(target));
-}
-
-// Test that assisnging a variant<..., T, ...> to a variant<1, ...>
-// produces a variant<..., T, ...> with the correct value.
-TYPED_TEST(VariantTypesTest, TestAssignmentCopiesValuesVaryingSourceType) {
-  typedef typename VariantFactory<typename TypeParam::value_type>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  const TypeParam value(TypeParam::kIndex);
-  const Variant source(value);
-  ASSERT_TRUE(absl::holds_alternative<TypeParam>(source));
-  Variant target(value_type1(1));
-  ASSERT_TRUE(absl::holds_alternative<value_type1>(target));
-  target = source;
-  EXPECT_TRUE(absl::holds_alternative<TypeParam>(source));
-  EXPECT_TRUE(absl::holds_alternative<TypeParam>(target));
-  EXPECT_EQ(absl::get<TypeParam>(source), absl::get<TypeParam>(target));
-}
-
-// Test that assigning a variant<1, ...> to a variant<..., T, ...>
-// produces a variant<1, ...> with the correct value.
-TYPED_TEST(VariantTypesTest, TestAssignmentCopiesValuesVaryingTargetType) {
-  typedef typename VariantFactory<typename TypeParam::value_type>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  const Variant source(value_type1(1));
-  ASSERT_TRUE(absl::holds_alternative<value_type1>(source));
-  const TypeParam value(TypeParam::kIndex);
-  Variant target(value);
-  ASSERT_TRUE(absl::holds_alternative<TypeParam>(target));
-  target = source;
-  EXPECT_TRUE(absl::holds_alternative<value_type1>(target));
-  EXPECT_TRUE(absl::holds_alternative<value_type1>(source));
-  EXPECT_EQ(absl::get<value_type1>(source), absl::get<value_type1>(target));
-}
-
-// Test that operator=<T> works, that assigning a new value destroys
-// the old and that assigning the new value again does not redestroy
-// the old
-TEST(VariantTest, TestAssign) {
-  typedef VariantFactory<IncrementInDtor>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  using value_type2 = absl::variant_alternative_t<1, Variant>;
-  using value_type3 = absl::variant_alternative_t<2, Variant>;
-  using value_type4 = absl::variant_alternative_t<3, Variant>;
-
-  const int kSize = 4;
-  int counter[kSize];
-  std::unique_ptr<IncrementInDtor> counter_adjustor[kSize];
-  for (int i = 0; i != kSize; i++) {
-    counter[i] = 0;
-    counter_adjustor[i] = absl::make_unique<IncrementInDtor>(&counter[i]);
-  }
-
-  value_type1 v1(*counter_adjustor[0]);
-  value_type2 v2(*counter_adjustor[1]);
-  value_type3 v3(*counter_adjustor[2]);
-  value_type4 v4(*counter_adjustor[3]);
-
-  // Test that reassignment causes destruction of old value
-  {
-    Variant object(v1);
-    object = v2;
-    object = v3;
-    object = v4;
-    object = v1;
-  }
-
-  EXPECT_EQ(2, counter[0]);
-  EXPECT_EQ(1, counter[1]);
-  EXPECT_EQ(1, counter[2]);
-  EXPECT_EQ(1, counter[3]);
-
-  std::fill(std::begin(counter), std::end(counter), 0);
-
-  // Test that self-assignment does not cause destruction of old value
-  {
-    Variant object(v1);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[0]);
-  }
-  {
-    Variant object(v2);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[1]);
-  }
-  {
-    Variant object(v3);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[2]);
-  }
-  {
-    Variant object(v4);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[3]);
-  }
-
-  EXPECT_EQ(1, counter[0]);
-  EXPECT_EQ(1, counter[1]);
-  EXPECT_EQ(1, counter[2]);
-  EXPECT_EQ(1, counter[3]);
-}
-
-// This tests that we perform a backup if the copy-assign can throw but the move
-// cannot throw.
-TEST(VariantTest, TestBackupAssign) {
-  typedef VariantFactory<IncrementInDtorCopyCanThrow>::Type Variant;
-  using value_type1 = absl::variant_alternative_t<0, Variant>;
-  using value_type2 = absl::variant_alternative_t<1, Variant>;
-  using value_type3 = absl::variant_alternative_t<2, Variant>;
-  using value_type4 = absl::variant_alternative_t<3, Variant>;
-
-  const int kSize = 4;
-  int counter[kSize];
-  std::unique_ptr<IncrementInDtorCopyCanThrow> counter_adjustor[kSize];
-  for (int i = 0; i != kSize; i++) {
-    counter[i] = 0;
-    counter_adjustor[i].reset(new IncrementInDtorCopyCanThrow(&counter[i]));
-  }
-
-  value_type1 v1(*counter_adjustor[0]);
-  value_type2 v2(*counter_adjustor[1]);
-  value_type3 v3(*counter_adjustor[2]);
-  value_type4 v4(*counter_adjustor[3]);
-
-  // Test that reassignment causes destruction of old value
-  {
-    Variant object(v1);
-    object = v2;
-    object = v3;
-    object = v4;
-    object = v1;
-  }
-
-  // libstdc++ doesn't pass this test
-#if !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-  EXPECT_EQ(3, counter[0]);
-  EXPECT_EQ(2, counter[1]);
-  EXPECT_EQ(2, counter[2]);
-  EXPECT_EQ(2, counter[3]);
-#endif
-
-  std::fill(std::begin(counter), std::end(counter), 0);
-
-  // Test that self-assignment does not cause destruction of old value
-  {
-    Variant object(v1);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[0]);
-  }
-  {
-    Variant object(v2);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[1]);
-  }
-  {
-    Variant object(v3);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[2]);
-  }
-  {
-    Variant object(v4);
-    object.operator=(object);
-    EXPECT_EQ(0, counter[3]);
-  }
-
-  EXPECT_EQ(1, counter[0]);
-  EXPECT_EQ(1, counter[1]);
-  EXPECT_EQ(1, counter[2]);
-  EXPECT_EQ(1, counter[3]);
-}
-
-///////////////////
-// [variant.mod] //
-///////////////////
-
-TEST(VariantTest, TestEmplaceBasic) {
-  using Variant = variant<int, char>;
-
-  Variant v(absl::in_place_index<0>, 0);
-
-  {
-    char& emplace_result = v.emplace<char>();
-    ASSERT_TRUE(absl::holds_alternative<char>(v));
-    EXPECT_EQ(absl::get<char>(v), 0);
-    EXPECT_EQ(&emplace_result, &absl::get<char>(v));
-  }
-
-  // Make sure that another emplace does zero-initialization
-  absl::get<char>(v) = 'a';
-  v.emplace<char>('b');
-  ASSERT_TRUE(absl::holds_alternative<char>(v));
-  EXPECT_EQ(absl::get<char>(v), 'b');
-
-  {
-    int& emplace_result = v.emplace<int>();
-    EXPECT_TRUE(absl::holds_alternative<int>(v));
-    EXPECT_EQ(absl::get<int>(v), 0);
-    EXPECT_EQ(&emplace_result, &absl::get<int>(v));
-  }
-}
-
-TEST(VariantTest, TestEmplaceInitializerList) {
-  using Var =
-      variant<int, std::string, NonCopyable, MoveOnlyWithListConstructor>;
-
-  Var v1(absl::in_place_index<0>, 555);
-  MoveOnlyWithListConstructor& emplace_result =
-      v1.emplace<MoveOnlyWithListConstructor>({1, 2, 3, 4, 5}, 6);
-  ASSERT_TRUE(absl::holds_alternative<MoveOnlyWithListConstructor>(v1));
-  EXPECT_EQ(6, absl::get<MoveOnlyWithListConstructor>(v1).value);
-  EXPECT_EQ(&emplace_result, &absl::get<MoveOnlyWithListConstructor>(v1));
-}
-
-TEST(VariantTest, TestEmplaceIndex) {
-  using Variant = variant<int, char>;
-
-  Variant v(absl::in_place_index<0>, 555);
-
-  {
-    char& emplace_result = v.emplace<1>();
-    ASSERT_TRUE(absl::holds_alternative<char>(v));
-    EXPECT_EQ(absl::get<char>(v), 0);
-    EXPECT_EQ(&emplace_result, &absl::get<char>(v));
-  }
-
-  // Make sure that another emplace does zero-initialization
-  absl::get<char>(v) = 'a';
-  v.emplace<1>('b');
-  ASSERT_TRUE(absl::holds_alternative<char>(v));
-  EXPECT_EQ(absl::get<char>(v), 'b');
-
-  {
-    int& emplace_result = v.emplace<0>();
-    EXPECT_TRUE(absl::holds_alternative<int>(v));
-    EXPECT_EQ(absl::get<int>(v), 0);
-    EXPECT_EQ(&emplace_result, &absl::get<int>(v));
-  }
-}
-
-TEST(VariantTest, TestEmplaceIndexInitializerList) {
-  using Var =
-      variant<int, std::string, NonCopyable, MoveOnlyWithListConstructor>;
-
-  Var v1(absl::in_place_index<0>, 555);
-  MoveOnlyWithListConstructor& emplace_result =
-      v1.emplace<3>({1, 2, 3, 4, 5}, 6);
-  ASSERT_TRUE(absl::holds_alternative<MoveOnlyWithListConstructor>(v1));
-  EXPECT_EQ(6, absl::get<MoveOnlyWithListConstructor>(v1).value);
-  EXPECT_EQ(&emplace_result, &absl::get<MoveOnlyWithListConstructor>(v1));
-}
-
-//////////////////////
-// [variant.status] //
-//////////////////////
-
-TEST(VariantTest, Index) {
-  using Var = variant<int, std::string, double>;
-
-  Var v = 1;
-  EXPECT_EQ(0, v.index());
-  v = "str";
-  EXPECT_EQ(1, v.index());
-  v = 0.;
-  EXPECT_EQ(2, v.index());
-
-  Var v2 = v;
-  EXPECT_EQ(2, v2.index());
-  v2.emplace<int>(3);
-  EXPECT_EQ(0, v2.index());
-}
-
-TEST(VariantTest, NotValuelessByException) {
-  using Var = variant<int, std::string, double>;
-
-  Var v = 1;
-  EXPECT_FALSE(v.valueless_by_exception());
-  v = "str";
-  EXPECT_FALSE(v.valueless_by_exception());
-  v = 0.;
-  EXPECT_FALSE(v.valueless_by_exception());
-
-  Var v2 = v;
-  EXPECT_FALSE(v.valueless_by_exception());
-  v2.emplace<int>(3);
-  EXPECT_FALSE(v.valueless_by_exception());
-}
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-TEST(VariantTest, IndexValuelessByException) {
-  using Var = variant<MoveCanThrow, std::string, double>;
-
-  Var v(absl::in_place_index<0>);
-  EXPECT_EQ(0, v.index());
-  ToValuelessByException(v);
-  EXPECT_EQ(absl::variant_npos, v.index());
-  v = "str";
-  EXPECT_EQ(1, v.index());
-}
-
-TEST(VariantTest, ValuelessByException) {
-  using Var = variant<MoveCanThrow, std::string, double>;
-
-  Var v(absl::in_place_index<0>);
-  EXPECT_FALSE(v.valueless_by_exception());
-  ToValuelessByException(v);
-  EXPECT_TRUE(v.valueless_by_exception());
-  v = "str";
-  EXPECT_FALSE(v.valueless_by_exception());
-}
-
-#endif  // ABSL_HAVE_EXCEPTIONS
-
-////////////////////
-// [variant.swap] //
-////////////////////
-
-TEST(VariantTest, MemberSwap) {
-  SpecialSwap v1(3);
-  SpecialSwap v2(7);
-
-  variant<SpecialSwap> a = v1, b = v2;
-
-  EXPECT_THAT(a, VariantWith<SpecialSwap>(v1));
-  EXPECT_THAT(b, VariantWith<SpecialSwap>(v2));
-
-  a.swap(b);
-  EXPECT_THAT(a, VariantWith<SpecialSwap>(v2));
-  EXPECT_THAT(b, VariantWith<SpecialSwap>(v1));
-  EXPECT_TRUE(absl::get<SpecialSwap>(a).special_swap);
-
-  using V = variant<MoveCanThrow, std::string, int>;
-  int i = 33;
-  std::string s = "abc";
-  {
-    // lhs and rhs holds different alternative
-    V lhs(i), rhs(s);
-    lhs.swap(rhs);
-    EXPECT_THAT(lhs, VariantWith<std::string>(s));
-    EXPECT_THAT(rhs, VariantWith<int>(i));
-  }
-#ifdef ABSL_HAVE_EXCEPTIONS
-  V valueless(in_place_index<0>);
-  ToValuelessByException(valueless);
-  {
-    // lhs is valueless
-    V lhs(valueless), rhs(i);
-    lhs.swap(rhs);
-    EXPECT_THAT(lhs, VariantWith<int>(i));
-    EXPECT_TRUE(rhs.valueless_by_exception());
-  }
-  {
-    // rhs is valueless
-    V lhs(s), rhs(valueless);
-    lhs.swap(rhs);
-    EXPECT_THAT(rhs, VariantWith<std::string>(s));
-    EXPECT_TRUE(lhs.valueless_by_exception());
-  }
-  {
-    // both are valueless
-    V lhs(valueless), rhs(valueless);
-    lhs.swap(rhs);
-    EXPECT_TRUE(lhs.valueless_by_exception());
-    EXPECT_TRUE(rhs.valueless_by_exception());
-  }
-#endif  // ABSL_HAVE_EXCEPTIONS
-}
-
-//////////////////////
-// [variant.helper] //
-//////////////////////
-
-TEST(VariantTest, VariantSize) {
-  {
-    using Size1Variant = absl::variant<int>;
-    EXPECT_EQ(1, absl::variant_size<Size1Variant>::value);
-    EXPECT_EQ(1, absl::variant_size<const Size1Variant>::value);
-    EXPECT_EQ(1, absl::variant_size<volatile Size1Variant>::value);
-    EXPECT_EQ(1, absl::variant_size<const volatile Size1Variant>::value);
-  }
-
-  {
-    using Size3Variant = absl::variant<int, float, int>;
-    EXPECT_EQ(3, absl::variant_size<Size3Variant>::value);
-    EXPECT_EQ(3, absl::variant_size<const Size3Variant>::value);
-    EXPECT_EQ(3, absl::variant_size<volatile Size3Variant>::value);
-    EXPECT_EQ(3, absl::variant_size<const volatile Size3Variant>::value);
-  }
-}
-
-TEST(VariantTest, VariantAlternative) {
-  {
-    using V = absl::variant<float, int, const char*>;
-    EXPECT_TRUE(
-        (std::is_same<float, absl::variant_alternative_t<0, V>>::value));
-    EXPECT_TRUE((std::is_same<const float,
-                              absl::variant_alternative_t<0, const V>>::value));
-    EXPECT_TRUE(
-        (std::is_same<volatile float,
-                      absl::variant_alternative_t<0, volatile V>>::value));
-    EXPECT_TRUE((
-        std::is_same<const volatile float,
-                     absl::variant_alternative_t<0, const volatile V>>::value));
-
-    EXPECT_TRUE((std::is_same<int, absl::variant_alternative_t<1, V>>::value));
-    EXPECT_TRUE((std::is_same<const int,
-                              absl::variant_alternative_t<1, const V>>::value));
-    EXPECT_TRUE(
-        (std::is_same<volatile int,
-                      absl::variant_alternative_t<1, volatile V>>::value));
-    EXPECT_TRUE((
-        std::is_same<const volatile int,
-                     absl::variant_alternative_t<1, const volatile V>>::value));
-
-    EXPECT_TRUE(
-        (std::is_same<const char*, absl::variant_alternative_t<2, V>>::value));
-    EXPECT_TRUE((std::is_same<const char* const,
-                              absl::variant_alternative_t<2, const V>>::value));
-    EXPECT_TRUE(
-        (std::is_same<const char* volatile,
-                      absl::variant_alternative_t<2, volatile V>>::value));
-    EXPECT_TRUE((
-        std::is_same<const char* const volatile,
-                     absl::variant_alternative_t<2, const volatile V>>::value));
-  }
-
-  {
-    using V = absl::variant<float, volatile int, const char*>;
-    EXPECT_TRUE(
-        (std::is_same<float, absl::variant_alternative_t<0, V>>::value));
-    EXPECT_TRUE((std::is_same<const float,
-                              absl::variant_alternative_t<0, const V>>::value));
-    EXPECT_TRUE(
-        (std::is_same<volatile float,
-                      absl::variant_alternative_t<0, volatile V>>::value));
-    EXPECT_TRUE((
-        std::is_same<const volatile float,
-                     absl::variant_alternative_t<0, const volatile V>>::value));
-
-    EXPECT_TRUE(
-        (std::is_same<volatile int, absl::variant_alternative_t<1, V>>::value));
-    EXPECT_TRUE((std::is_same<const volatile int,
-                              absl::variant_alternative_t<1, const V>>::value));
-    EXPECT_TRUE(
-        (std::is_same<volatile int,
-                      absl::variant_alternative_t<1, volatile V>>::value));
-    EXPECT_TRUE((
-        std::is_same<const volatile int,
-                     absl::variant_alternative_t<1, const volatile V>>::value));
-
-    EXPECT_TRUE(
-        (std::is_same<const char*, absl::variant_alternative_t<2, V>>::value));
-    EXPECT_TRUE((std::is_same<const char* const,
-                              absl::variant_alternative_t<2, const V>>::value));
-    EXPECT_TRUE(
-        (std::is_same<const char* volatile,
-                      absl::variant_alternative_t<2, volatile V>>::value));
-    EXPECT_TRUE((
-        std::is_same<const char* const volatile,
-                     absl::variant_alternative_t<2, const volatile V>>::value));
-  }
-}
-
-///////////////////
-// [variant.get] //
-///////////////////
-
-TEST(VariantTest, HoldsAlternative) {
-  using Var = variant<int, std::string, double>;
-
-  Var v = 1;
-  EXPECT_TRUE(absl::holds_alternative<int>(v));
-  EXPECT_FALSE(absl::holds_alternative<std::string>(v));
-  EXPECT_FALSE(absl::holds_alternative<double>(v));
-  v = "str";
-  EXPECT_FALSE(absl::holds_alternative<int>(v));
-  EXPECT_TRUE(absl::holds_alternative<std::string>(v));
-  EXPECT_FALSE(absl::holds_alternative<double>(v));
-  v = 0.;
-  EXPECT_FALSE(absl::holds_alternative<int>(v));
-  EXPECT_FALSE(absl::holds_alternative<std::string>(v));
-  EXPECT_TRUE(absl::holds_alternative<double>(v));
-
-  Var v2 = v;
-  EXPECT_FALSE(absl::holds_alternative<int>(v2));
-  EXPECT_FALSE(absl::holds_alternative<std::string>(v2));
-  EXPECT_TRUE(absl::holds_alternative<double>(v2));
-  v2.emplace<int>(3);
-  EXPECT_TRUE(absl::holds_alternative<int>(v2));
-  EXPECT_FALSE(absl::holds_alternative<std::string>(v2));
-  EXPECT_FALSE(absl::holds_alternative<double>(v2));
-}
-
-TEST(VariantTest, GetIndex) {
-  using Var = variant<int, std::string, double, int>;
-
-  {
-    Var v(absl::in_place_index<0>, 0);
-
-    using LValueGetType = decltype(absl::get<0>(v));
-    using RValueGetType = decltype(absl::get<0>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, int&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, int&&>::value));
-    EXPECT_EQ(absl::get<0>(v), 0);
-    EXPECT_EQ(absl::get<0>(absl::move(v)), 0);
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<0>(const_v));
-    using ConstRValueGetType = decltype(absl::get<0>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const int&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const int&&>::value));
-    EXPECT_EQ(absl::get<0>(const_v), 0);
-    EXPECT_EQ(absl::get<0>(absl::move(const_v)), 0);
-  }
-
-  {
-    Var v = std::string("Hello");
-
-    using LValueGetType = decltype(absl::get<1>(v));
-    using RValueGetType = decltype(absl::get<1>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, std::string&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, std::string&&>::value));
-    EXPECT_EQ(absl::get<1>(v), "Hello");
-    EXPECT_EQ(absl::get<1>(absl::move(v)), "Hello");
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<1>(const_v));
-    using ConstRValueGetType = decltype(absl::get<1>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const std::string&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const std::string&&>::value));
-    EXPECT_EQ(absl::get<1>(const_v), "Hello");
-    EXPECT_EQ(absl::get<1>(absl::move(const_v)), "Hello");
-  }
-
-  {
-    Var v = 2.0;
-
-    using LValueGetType = decltype(absl::get<2>(v));
-    using RValueGetType = decltype(absl::get<2>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, double&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, double&&>::value));
-    EXPECT_EQ(absl::get<2>(v), 2.);
-    EXPECT_EQ(absl::get<2>(absl::move(v)), 2.);
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<2>(const_v));
-    using ConstRValueGetType = decltype(absl::get<2>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const double&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const double&&>::value));
-    EXPECT_EQ(absl::get<2>(const_v), 2.);
-    EXPECT_EQ(absl::get<2>(absl::move(const_v)), 2.);
-  }
-
-  {
-    Var v(absl::in_place_index<0>, 0);
-    v.emplace<3>(1);
-
-    using LValueGetType = decltype(absl::get<3>(v));
-    using RValueGetType = decltype(absl::get<3>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, int&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, int&&>::value));
-    EXPECT_EQ(absl::get<3>(v), 1);
-    EXPECT_EQ(absl::get<3>(absl::move(v)), 1);
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<3>(const_v));
-    using ConstRValueGetType = decltype(absl::get<3>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const int&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const int&&>::value));
-    EXPECT_EQ(absl::get<3>(const_v), 1);
-    EXPECT_EQ(absl::get<3>(absl::move(const_v)), 1);  // NOLINT
-  }
-}
-
-TEST(VariantTest, BadGetIndex) {
-  using Var = variant<int, std::string, double>;
-
-  {
-    Var v = 1;
-
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<1>(v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<1>(std::move(v)));
-
-    const Var& const_v = v;
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<1>(const_v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(
-        absl::get<1>(std::move(const_v)));  // NOLINT
-  }
-
-  {
-    Var v = std::string("Hello");
-
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<0>(v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<0>(std::move(v)));
-
-    const Var& const_v = v;
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<0>(const_v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(
-        absl::get<0>(std::move(const_v)));  // NOLINT
-  }
-}
-
-TEST(VariantTest, GetType) {
-  using Var = variant<int, std::string, double>;
-
-  {
-    Var v = 1;
-
-    using LValueGetType = decltype(absl::get<int>(v));
-    using RValueGetType = decltype(absl::get<int>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, int&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, int&&>::value));
-    EXPECT_EQ(absl::get<int>(v), 1);
-    EXPECT_EQ(absl::get<int>(absl::move(v)), 1);
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<int>(const_v));
-    using ConstRValueGetType = decltype(absl::get<int>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const int&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const int&&>::value));
-    EXPECT_EQ(absl::get<int>(const_v), 1);
-    EXPECT_EQ(absl::get<int>(absl::move(const_v)), 1);
-  }
-
-  {
-    Var v = std::string("Hello");
-
-    using LValueGetType = decltype(absl::get<1>(v));
-    using RValueGetType = decltype(absl::get<1>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, std::string&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, std::string&&>::value));
-    EXPECT_EQ(absl::get<std::string>(v), "Hello");
-    EXPECT_EQ(absl::get<std::string>(absl::move(v)), "Hello");
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<1>(const_v));
-    using ConstRValueGetType = decltype(absl::get<1>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const std::string&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const std::string&&>::value));
-    EXPECT_EQ(absl::get<std::string>(const_v), "Hello");
-    EXPECT_EQ(absl::get<std::string>(absl::move(const_v)), "Hello");
-  }
-
-  {
-    Var v = 2.0;
-
-    using LValueGetType = decltype(absl::get<2>(v));
-    using RValueGetType = decltype(absl::get<2>(absl::move(v)));
-
-    EXPECT_TRUE((std::is_same<LValueGetType, double&>::value));
-    EXPECT_TRUE((std::is_same<RValueGetType, double&&>::value));
-    EXPECT_EQ(absl::get<double>(v), 2.);
-    EXPECT_EQ(absl::get<double>(absl::move(v)), 2.);
-
-    const Var& const_v = v;
-    using ConstLValueGetType = decltype(absl::get<2>(const_v));
-    using ConstRValueGetType = decltype(absl::get<2>(absl::move(const_v)));
-    EXPECT_TRUE((std::is_same<ConstLValueGetType, const double&>::value));
-    EXPECT_TRUE((std::is_same<ConstRValueGetType, const double&&>::value));
-    EXPECT_EQ(absl::get<double>(const_v), 2.);
-    EXPECT_EQ(absl::get<double>(absl::move(const_v)), 2.);
-  }
-}
-
-TEST(VariantTest, BadGetType) {
-  using Var = variant<int, std::string, double>;
-
-  {
-    Var v = 1;
-
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<std::string>(v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(
-        absl::get<std::string>(std::move(v)));
-
-    const Var& const_v = v;
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(
-        absl::get<std::string>(const_v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(
-        absl::get<std::string>(std::move(const_v)));  // NOLINT
-  }
-
-  {
-    Var v = std::string("Hello");
-
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<int>(v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<int>(std::move(v)));
-
-    const Var& const_v = v;
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(absl::get<int>(const_v));
-    ABSL_VARIANT_TEST_EXPECT_BAD_VARIANT_ACCESS(
-        absl::get<int>(std::move(const_v)));  // NOLINT
-  }
-}
-
-TEST(VariantTest, GetIfIndex) {
-  using Var = variant<int, std::string, double, int>;
-
-  {
-    Var v(absl::in_place_index<0>, 0);
-    EXPECT_TRUE(noexcept(absl::get_if<0>(&v)));
-
-    {
-      auto* elem = absl::get_if<0>(&v);
-      EXPECT_TRUE((std::is_same<decltype(elem), int*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, 0);
-      {
-        auto* bad_elem = absl::get_if<1>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), std::string*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<2>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), double*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<3>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-    }
-
-    const Var& const_v = v;
-    EXPECT_TRUE(noexcept(absl::get_if<0>(&const_v)));
-
-    {
-      auto* elem = absl::get_if<0>(&const_v);
-      EXPECT_TRUE((std::is_same<decltype(elem), const int*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, 0);
-      {
-        auto* bad_elem = absl::get_if<1>(&const_v);
-        EXPECT_TRUE(
-            (std::is_same<decltype(bad_elem), const std::string*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<2>(&const_v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const double*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<3>(&const_v);
-        EXPECT_EQ(bad_elem, nullptr);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const int*>::value));
-      }
-    }
-  }
-
-  {
-    Var v = std::string("Hello");
-    EXPECT_TRUE(noexcept(absl::get_if<1>(&v)));
-
-    {
-      auto* elem = absl::get_if<1>(&v);
-      EXPECT_TRUE((std::is_same<decltype(elem), std::string*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, "Hello");
-      {
-        auto* bad_elem = absl::get_if<0>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<2>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), double*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<3>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-    }
-
-    const Var& const_v = v;
-    EXPECT_TRUE(noexcept(absl::get_if<1>(&const_v)));
-
-    {
-      auto* elem = absl::get_if<1>(&const_v);
-      EXPECT_TRUE((std::is_same<decltype(elem), const std::string*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, "Hello");
-      {
-        auto* bad_elem = absl::get_if<0>(&const_v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<2>(&const_v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const double*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<3>(&const_v);
-        EXPECT_EQ(bad_elem, nullptr);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const int*>::value));
-      }
-    }
-  }
-
-  {
-    Var v = 2.0;
-    EXPECT_TRUE(noexcept(absl::get_if<2>(&v)));
-
-    {
-      auto* elem = absl::get_if<2>(&v);
-      EXPECT_TRUE((std::is_same<decltype(elem), double*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, 2.0);
-      {
-        auto* bad_elem = absl::get_if<0>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<1>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), std::string*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<3>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-    }
-
-    const Var& const_v = v;
-    EXPECT_TRUE(noexcept(absl::get_if<2>(&const_v)));
-
-    {
-      auto* elem = absl::get_if<2>(&const_v);
-      EXPECT_TRUE((std::is_same<decltype(elem), const double*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, 2.0);
-      {
-        auto* bad_elem = absl::get_if<0>(&const_v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<1>(&const_v);
-        EXPECT_TRUE(
-            (std::is_same<decltype(bad_elem), const std::string*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<3>(&const_v);
-        EXPECT_EQ(bad_elem, nullptr);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const int*>::value));
-      }
-    }
-  }
-
-  {
-    Var v(absl::in_place_index<0>, 0);
-    v.emplace<3>(1);
-    EXPECT_TRUE(noexcept(absl::get_if<3>(&v)));
-
-    {
-      auto* elem = absl::get_if<3>(&v);
-      EXPECT_TRUE((std::is_same<decltype(elem), int*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, 1);
-      {
-        auto* bad_elem = absl::get_if<0>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<1>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), std::string*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<2>(&v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), double*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-    }
-
-    const Var& const_v = v;
-    EXPECT_TRUE(noexcept(absl::get_if<3>(&const_v)));
-
-    {
-      auto* elem = absl::get_if<3>(&const_v);
-      EXPECT_TRUE((std::is_same<decltype(elem), const int*>::value));
-      ASSERT_NE(elem, nullptr);
-      EXPECT_EQ(*elem, 1);
-      {
-        auto* bad_elem = absl::get_if<0>(&const_v);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const int*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<1>(&const_v);
-        EXPECT_TRUE(
-            (std::is_same<decltype(bad_elem), const std::string*>::value));
-        EXPECT_EQ(bad_elem, nullptr);
-      }
-      {
-        auto* bad_elem = absl::get_if<2>(&const_v);
-        EXPECT_EQ(bad_elem, nullptr);
-        EXPECT_TRUE((std::is_same<decltype(bad_elem), const double*>::value));
-      }
-    }
-  }
-}
-
-//////////////////////
-// [variant.relops] //
-//////////////////////
-
-TEST(VariantTest, OperatorEquals) {
-  variant<int, std::string> a(1), b(1);
-  EXPECT_TRUE(a == b);
-  EXPECT_TRUE(b == a);
-  EXPECT_FALSE(a != b);
-  EXPECT_FALSE(b != a);
-
-  b = "str";
-  EXPECT_FALSE(a == b);
-  EXPECT_FALSE(b == a);
-  EXPECT_TRUE(a != b);
-  EXPECT_TRUE(b != a);
-
-  b = 0;
-  EXPECT_FALSE(a == b);
-  EXPECT_FALSE(b == a);
-  EXPECT_TRUE(a != b);
-  EXPECT_TRUE(b != a);
-
-  a = b = "foo";
-  EXPECT_TRUE(a == b);
-  EXPECT_TRUE(b == a);
-  EXPECT_FALSE(a != b);
-  EXPECT_FALSE(b != a);
-
-  a = "bar";
-  EXPECT_FALSE(a == b);
-  EXPECT_FALSE(b == a);
-  EXPECT_TRUE(a != b);
-  EXPECT_TRUE(b != a);
-}
-
-TEST(VariantTest, OperatorRelational) {
-  variant<int, std::string> a(1), b(1);
-  EXPECT_FALSE(a < b);
-  EXPECT_FALSE(b < a);
-  EXPECT_FALSE(a > b);
-  EXPECT_FALSE(b > a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_TRUE(b <= a);
-  EXPECT_TRUE(a >= b);
-  EXPECT_TRUE(b >= a);
-
-  b = "str";
-  EXPECT_TRUE(a < b);
-  EXPECT_FALSE(b < a);
-  EXPECT_FALSE(a > b);
-  EXPECT_TRUE(b > a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_FALSE(b <= a);
-  EXPECT_FALSE(a >= b);
-  EXPECT_TRUE(b >= a);
-
-  b = 0;
-  EXPECT_FALSE(a < b);
-  EXPECT_TRUE(b < a);
-  EXPECT_TRUE(a > b);
-  EXPECT_FALSE(b > a);
-  EXPECT_FALSE(a <= b);
-  EXPECT_TRUE(b <= a);
-  EXPECT_TRUE(a >= b);
-  EXPECT_FALSE(b >= a);
-
-  a = b = "foo";
-  EXPECT_FALSE(a < b);
-  EXPECT_FALSE(b < a);
-  EXPECT_FALSE(a > b);
-  EXPECT_FALSE(b > a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_TRUE(b <= a);
-  EXPECT_TRUE(a >= b);
-  EXPECT_TRUE(b >= a);
-
-  a = "bar";
-  EXPECT_TRUE(a < b);
-  EXPECT_FALSE(b < a);
-  EXPECT_FALSE(a > b);
-  EXPECT_TRUE(b > a);
-  EXPECT_TRUE(a <= b);
-  EXPECT_FALSE(b <= a);
-  EXPECT_FALSE(a >= b);
-  EXPECT_TRUE(b >= a);
-}
-
-#ifdef ABSL_HAVE_EXCEPTIONS
-
-TEST(VariantTest, ValuelessOperatorEquals) {
-  variant<MoveCanThrow, std::string> int_v(1), string_v("Hello"),
-      valueless(absl::in_place_index<0>),
-      other_valueless(absl::in_place_index<0>);
-  ToValuelessByException(valueless);
-  ToValuelessByException(other_valueless);
-
-  EXPECT_TRUE(valueless == other_valueless);
-  EXPECT_TRUE(other_valueless == valueless);
-  EXPECT_FALSE(valueless == int_v);
-  EXPECT_FALSE(valueless == string_v);
-  EXPECT_FALSE(int_v == valueless);
-  EXPECT_FALSE(string_v == valueless);
-
-  EXPECT_FALSE(valueless != other_valueless);
-  EXPECT_FALSE(other_valueless != valueless);
-  EXPECT_TRUE(valueless != int_v);
-  EXPECT_TRUE(valueless != string_v);
-  EXPECT_TRUE(int_v != valueless);
-  EXPECT_TRUE(string_v != valueless);
-}
-
-TEST(VariantTest, ValuelessOperatorRelational) {
-  variant<MoveCanThrow, std::string> int_v(1), string_v("Hello"),
-      valueless(absl::in_place_index<0>),
-      other_valueless(absl::in_place_index<0>);
-  ToValuelessByException(valueless);
-  ToValuelessByException(other_valueless);
-
-  EXPECT_FALSE(valueless < other_valueless);
-  EXPECT_FALSE(other_valueless < valueless);
-  EXPECT_TRUE(valueless < int_v);
-  EXPECT_TRUE(valueless < string_v);
-  EXPECT_FALSE(int_v < valueless);
-  EXPECT_FALSE(string_v < valueless);
-
-  EXPECT_TRUE(valueless <= other_valueless);
-  EXPECT_TRUE(other_valueless <= valueless);
-  EXPECT_TRUE(valueless <= int_v);
-  EXPECT_TRUE(valueless <= string_v);
-  EXPECT_FALSE(int_v <= valueless);
-  EXPECT_FALSE(string_v <= valueless);
-
-  EXPECT_TRUE(valueless >= other_valueless);
-  EXPECT_TRUE(other_valueless >= valueless);
-  EXPECT_FALSE(valueless >= int_v);
-  EXPECT_FALSE(valueless >= string_v);
-  EXPECT_TRUE(int_v >= valueless);
-  EXPECT_TRUE(string_v >= valueless);
-
-  EXPECT_FALSE(valueless > other_valueless);
-  EXPECT_FALSE(other_valueless > valueless);
-  EXPECT_FALSE(valueless > int_v);
-  EXPECT_FALSE(valueless > string_v);
-  EXPECT_TRUE(int_v > valueless);
-  EXPECT_TRUE(string_v > valueless);
-}
-
-#endif
-
-/////////////////////
-// [variant.visit] //
-/////////////////////
-
-template <typename T>
-struct ConvertTo {
-  template <typename U>
-  T operator()(const U& u) const {
-    return u;
-  }
-};
-
-TEST(VariantTest, VisitSimple) {
-  variant<std::string, const char*> v = "A";
-
-  std::string str = absl::visit(ConvertTo<std::string>{}, v);
-  EXPECT_EQ("A", str);
-
-  v = std::string("B");
-
-  absl::string_view piece = absl::visit(ConvertTo<absl::string_view>{}, v);
-  EXPECT_EQ("B", piece);
-
-  struct StrLen {
-    int operator()(const char* s) const { return strlen(s); }
-    int operator()(const std::string& s) const { return s.size(); }
-  };
-
-  v = "SomeStr";
-  EXPECT_EQ(7, absl::visit(StrLen{}, v));
-  v = std::string("VeryLargeThisTime");
-  EXPECT_EQ(17, absl::visit(StrLen{}, v));
-}
-
-TEST(VariantTest, VisitRValue) {
-  variant<std::string> v = std::string("X");
-  struct Visitor {
-    bool operator()(const std::string&) const { return false; }
-    bool operator()(std::string&&) const { return true; }  // NOLINT
-
-    int operator()(const std::string&, const std::string&) const { return 0; }
-    int operator()(const std::string&, std::string&&) const {
-      return 1;
-    }  // NOLINT
-    int operator()(std::string&&, const std::string&) const {
-      return 2;
-    }                                                                 // NOLINT
-    int operator()(std::string&&, std::string&&) const { return 3; }  // NOLINT
-  };
-  EXPECT_FALSE(absl::visit(Visitor{}, v));
-  EXPECT_TRUE(absl::visit(Visitor{}, absl::move(v)));
-
-  // Also test the variadic overload.
-  EXPECT_EQ(0, absl::visit(Visitor{}, v, v));
-  EXPECT_EQ(1, absl::visit(Visitor{}, v, absl::move(v)));
-  EXPECT_EQ(2, absl::visit(Visitor{}, absl::move(v), v));
-  EXPECT_EQ(3, absl::visit(Visitor{}, absl::move(v), absl::move(v)));
-}
-
-TEST(VariantTest, VisitRValueVisitor) {
-  variant<std::string> v = std::string("X");
-  struct Visitor {
-    bool operator()(const std::string&) const& { return false; }
-    bool operator()(const std::string&) && { return true; }
-  };
-  Visitor visitor;
-  EXPECT_FALSE(absl::visit(visitor, v));
-  EXPECT_TRUE(absl::visit(Visitor{}, v));
-}
-
-TEST(VariantTest, VisitResultTypeDifferent) {
-  variant<std::string> v = std::string("X");
-  struct LValue_LValue {};
-  struct RValue_LValue {};
-  struct LValue_RValue {};
-  struct RValue_RValue {};
-  struct Visitor {
-    LValue_LValue operator()(const std::string&) const& { return {}; }
-    RValue_LValue operator()(std::string&&) const& { return {}; }  // NOLINT
-    LValue_RValue operator()(const std::string&) && { return {}; }
-    RValue_RValue operator()(std::string&&) && { return {}; }  // NOLINT
-  } visitor;
-
-  EXPECT_TRUE(
-      (std::is_same<LValue_LValue, decltype(absl::visit(visitor, v))>::value));
-  EXPECT_TRUE(
-      (std::is_same<RValue_LValue,
-                    decltype(absl::visit(visitor, absl::move(v)))>::value));
-  EXPECT_TRUE((
-      std::is_same<LValue_RValue, decltype(absl::visit(Visitor{}, v))>::value));
-  EXPECT_TRUE(
-      (std::is_same<RValue_RValue,
-                    decltype(absl::visit(Visitor{}, absl::move(v)))>::value));
-}
-
-TEST(VariantTest, VisitVariadic) {
-  using A = variant<int, std::string>;
-  using B = variant<std::unique_ptr<int>, absl::string_view>;
-
-  struct Visitor {
-    std::pair<int, int> operator()(int a, std::unique_ptr<int> b) const {
-      return {a, *b};
-    }
-    std::pair<int, int> operator()(absl::string_view a,
-                                   std::unique_ptr<int> b) const {
-      return {static_cast<int>(a.size()), static_cast<int>(*b)};
-    }
-    std::pair<int, int> operator()(int a, absl::string_view b) const {
-      return {a, static_cast<int>(b.size())};
-    }
-    std::pair<int, int> operator()(absl::string_view a,
-                                   absl::string_view b) const {
-      return {static_cast<int>(a.size()), static_cast<int>(b.size())};
-    }
-  };
-
-  EXPECT_THAT(absl::visit(Visitor(), A(1), B(std::unique_ptr<int>(new int(7)))),
-              ::testing::Pair(1, 7));
-  EXPECT_THAT(absl::visit(Visitor(), A(1), B(absl::string_view("ABC"))),
-              ::testing::Pair(1, 3));
-  EXPECT_THAT(absl::visit(Visitor(), A(std::string("BBBBB")),
-                          B(std::unique_ptr<int>(new int(7)))),
-              ::testing::Pair(5, 7));
-  EXPECT_THAT(absl::visit(Visitor(), A(std::string("BBBBB")),
-                          B(absl::string_view("ABC"))),
-              ::testing::Pair(5, 3));
-}
-
-TEST(VariantTest, VisitNoArgs) {
-  EXPECT_EQ(5, absl::visit([] { return 5; }));
-}
-
-struct ConstFunctor {
-  int operator()(int a, int b) const { return a - b; }
-};
-
-struct MutableFunctor {
-  int operator()(int a, int b) { return a - b; }
-};
-
-struct Class {
-  int Method(int a, int b) { return a - b; }
-  int ConstMethod(int a, int b) const { return a - b; }
-
-  int member;
-};
-
-TEST(VariantTest, VisitReferenceWrapper) {
-  ConstFunctor cf;
-  MutableFunctor mf;
-  absl::variant<int> three = 3;
-  absl::variant<int> two = 2;
-
-  EXPECT_EQ(1, absl::visit(std::cref(cf), three, two));
-  EXPECT_EQ(1, absl::visit(std::ref(cf), three, two));
-  EXPECT_EQ(1, absl::visit(std::ref(mf), three, two));
-}
-
-// libstdc++ std::variant doesn't support the INVOKE semantics.
-#if !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-TEST(VariantTest, VisitMemberFunction) {
-  absl::variant<std::unique_ptr<Class>> p(absl::make_unique<Class>());
-  absl::variant<std::unique_ptr<const Class>> cp(
-      absl::make_unique<const Class>());
-  absl::variant<int> three = 3;
-  absl::variant<int> two = 2;
-
-  EXPECT_EQ(1, absl::visit(&Class::Method, p, three, two));
-  EXPECT_EQ(1, absl::visit(&Class::ConstMethod, p, three, two));
-  EXPECT_EQ(1, absl::visit(&Class::ConstMethod, cp, three, two));
-}
-
-TEST(VariantTest, VisitDataMember) {
-  absl::variant<std::unique_ptr<Class>> p(absl::make_unique<Class>(Class{42}));
-  absl::variant<std::unique_ptr<const Class>> cp(
-      absl::make_unique<const Class>(Class{42}));
-  EXPECT_EQ(42, absl::visit(&Class::member, p));
-
-  absl::visit(&Class::member, p) = 5;
-  EXPECT_EQ(5, absl::visit(&Class::member, p));
-
-  EXPECT_EQ(42, absl::visit(&Class::member, cp));
-}
-#endif  // !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-
-/////////////////////////
-// [variant.monostate] //
-/////////////////////////
-
-TEST(VariantTest, MonostateBasic) {
-  absl::monostate mono;
-  (void)mono;
-
-  // TODO(mattcalabrese) Expose move triviality metafunctions in absl.
-  EXPECT_TRUE(absl::is_trivially_default_constructible<absl::monostate>::value);
-  EXPECT_TRUE(is_trivially_move_constructible<absl::monostate>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<absl::monostate>::value);
-  EXPECT_TRUE(is_trivially_move_assignable<absl::monostate>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<absl::monostate>::value);
-  EXPECT_TRUE(absl::is_trivially_destructible<absl::monostate>::value);
-}
-
-TEST(VariantTest, VariantMonostateDefaultConstruction) {
-  absl::variant<absl::monostate, NonDefaultConstructible> var;
-  EXPECT_EQ(var.index(), 0);
-}
-
-////////////////////////////////
-// [variant.monostate.relops] //
-////////////////////////////////
-
-TEST(VariantTest, MonostateComparisons) {
-  absl::monostate lhs, rhs;
-
-  EXPECT_EQ(lhs, lhs);
-  EXPECT_EQ(lhs, rhs);
-
-  EXPECT_FALSE(lhs != lhs);
-  EXPECT_FALSE(lhs != rhs);
-  EXPECT_FALSE(lhs < lhs);
-  EXPECT_FALSE(lhs < rhs);
-  EXPECT_FALSE(lhs > lhs);
-  EXPECT_FALSE(lhs > rhs);
-
-  EXPECT_LE(lhs, lhs);
-  EXPECT_LE(lhs, rhs);
-  EXPECT_GE(lhs, lhs);
-  EXPECT_GE(lhs, rhs);
-
-  EXPECT_TRUE(noexcept(std::declval<absl::monostate>() ==
-                       std::declval<absl::monostate>()));
-  EXPECT_TRUE(noexcept(std::declval<absl::monostate>() !=
-                       std::declval<absl::monostate>()));
-  EXPECT_TRUE(noexcept(std::declval<absl::monostate>() <
-                       std::declval<absl::monostate>()));
-  EXPECT_TRUE(noexcept(std::declval<absl::monostate>() >
-                       std::declval<absl::monostate>()));
-  EXPECT_TRUE(noexcept(std::declval<absl::monostate>() <=
-                       std::declval<absl::monostate>()));
-  EXPECT_TRUE(noexcept(std::declval<absl::monostate>() >=
-                       std::declval<absl::monostate>()));
-}
-
-///////////////////////
-// [variant.specalg] //
-///////////////////////
-
-TEST(VariantTest, NonmemberSwap) {
-  using std::swap;
-
-  SpecialSwap v1(3);
-  SpecialSwap v2(7);
-
-  variant<SpecialSwap> a = v1, b = v2;
-
-  EXPECT_THAT(a, VariantWith<SpecialSwap>(v1));
-  EXPECT_THAT(b, VariantWith<SpecialSwap>(v2));
-
-  std::swap(a, b);
-  EXPECT_THAT(a, VariantWith<SpecialSwap>(v2));
-  EXPECT_THAT(b, VariantWith<SpecialSwap>(v1));
-#ifndef ABSL_USES_STD_VARIANT
-  EXPECT_FALSE(absl::get<SpecialSwap>(a).special_swap);
-#endif
-
-  swap(a, b);
-  EXPECT_THAT(a, VariantWith<SpecialSwap>(v1));
-  EXPECT_THAT(b, VariantWith<SpecialSwap>(v2));
-  EXPECT_TRUE(absl::get<SpecialSwap>(b).special_swap);
-}
-
-//////////////////////////
-// [variant.bad.access] //
-//////////////////////////
-
-TEST(VariantTest, BadAccess) {
-  EXPECT_TRUE(noexcept(absl::bad_variant_access()));
-  absl::bad_variant_access exception_obj;
-  std::exception* base = &exception_obj;
-  (void)base;
-}
-
-////////////////////
-// [variant.hash] //
-////////////////////
-
-TEST(VariantTest, MonostateHash) {
-  absl::monostate mono, other_mono;
-  std::hash<absl::monostate> const hasher{};
-  static_assert(std::is_same<decltype(hasher(mono)), std::size_t>::value, "");
-  EXPECT_EQ(hasher(mono), hasher(other_mono));
-}
-
-TEST(VariantTest, Hash) {
-  static_assert(type_traits_internal::IsHashable<variant<int>>::value, "");
-  static_assert(type_traits_internal::IsHashable<variant<Hashable>>::value, "");
-  static_assert(type_traits_internal::IsHashable<variant<int, Hashable>>::value,
-                "");
-
-#if ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-  static_assert(!type_traits_internal::IsHashable<variant<NonHashable>>::value,
-                "");
-  static_assert(
-      !type_traits_internal::IsHashable<variant<Hashable, NonHashable>>::value,
-      "");
-#endif
-
-// MSVC std::hash<std::variant> does not use the index, thus produce the same
-// result on the same value as different alternative.
-#if !(defined(_MSC_VER) && defined(ABSL_USES_STD_VARIANT))
-  {
-    // same value as different alternative
-    variant<int, int> v0(in_place_index<0>, 42);
-    variant<int, int> v1(in_place_index<1>, 42);
-    std::hash<variant<int, int>> hash;
-    EXPECT_NE(hash(v0), hash(v1));
-  }
-#endif  // !(defined(_MSC_VER) && defined(ABSL_USES_STD_VARIANT))
-
-  {
-    std::hash<variant<int>> hash;
-    std::set<size_t> hashcodes;
-    for (int i = 0; i < 100; ++i) {
-      hashcodes.insert(hash(i));
-    }
-    EXPECT_GT(hashcodes.size(), 90);
-
-    // test const-qualified
-    static_assert(type_traits_internal::IsHashable<variant<const int>>::value,
-                  "");
-    static_assert(
-        type_traits_internal::IsHashable<variant<const Hashable>>::value, "");
-    std::hash<absl::variant<const int>> c_hash;
-    for (int i = 0; i < 100; ++i) {
-      EXPECT_EQ(hash(i), c_hash(i));
-    }
-  }
-}
-
-////////////////////////////////////////
-// Miscellaneous and deprecated tests //
-////////////////////////////////////////
-
-// Test that a set requiring a basic type conversion works correctly
-#if !defined(ABSL_USES_STD_VARIANT)
-TEST(VariantTest, TestConvertingSet) {
-  typedef variant<double> Variant;
-  Variant v(1.0);
-  const int two = 2;
-  v = two;
-  EXPECT_TRUE(absl::holds_alternative<double>(v));
-  ASSERT_TRUE(nullptr != absl::get_if<double>(&v));
-  EXPECT_DOUBLE_EQ(2, absl::get<double>(v));
-}
-#endif  // ABSL_USES_STD_VARIANT
-
-// Test that a vector of variants behaves reasonably.
-TEST(VariantTest, Container) {
-  typedef variant<int, float> Variant;
-
-  // Creation of vector should work
-  std::vector<Variant> vec;
-  vec.push_back(Variant(10));
-  vec.push_back(Variant(20.0f));
-
-  // Vector resizing should work if we supply a value for new slots
-  vec.resize(10, Variant(0));
-}
-
-// Test that a variant with a non-copyable type can be constructed and
-// manipulated to some degree.
-TEST(VariantTest, TestVariantWithNonCopyableType) {
-  typedef variant<int, NonCopyable> Variant;
-  const int kValue = 1;
-  Variant v(kValue);
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-  EXPECT_EQ(kValue, absl::get<int>(v));
-}
-
-// Test that a variant with a non-copyable type can be transformed to
-// the non-copyable type with a call to `emplace` for different numbers
-// of arguments. We do not need to test this for each of T1 ... T8
-// because `emplace` does not overload on T1 ... to T8, so if this
-// works for any one of T1 ... T8, then it works for all of them. We
-// do need to test that it works with varying numbers of parameters
-// though.
-TEST(VariantTest, TestEmplace) {
-  typedef variant<int, NonCopyable> Variant;
-  const int kValue = 1;
-  Variant v(kValue);
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-  EXPECT_EQ(kValue, absl::get<int>(v));
-
-  // emplace with zero arguments, then back to 'int'
-  v.emplace<NonCopyable>();
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v));
-  EXPECT_EQ(0, absl::get<NonCopyable>(v).value);
-  v = kValue;
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-
-  // emplace with one argument:
-  v.emplace<NonCopyable>(1);
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v));
-  EXPECT_EQ(1, absl::get<NonCopyable>(v).value);
-  v = kValue;
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-
-  // emplace with two arguments:
-  v.emplace<NonCopyable>(1, 2);
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v));
-  EXPECT_EQ(3, absl::get<NonCopyable>(v).value);
-  v = kValue;
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-
-  // emplace with three arguments
-  v.emplace<NonCopyable>(1, 2, 3);
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v));
-  EXPECT_EQ(6, absl::get<NonCopyable>(v).value);
-  v = kValue;
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-
-  // emplace with four arguments
-  v.emplace<NonCopyable>(1, 2, 3, 4);
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v));
-  EXPECT_EQ(10, absl::get<NonCopyable>(v).value);
-  v = kValue;
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-}
-
-TEST(VariantTest, TestEmplaceDestroysCurrentValue) {
-  typedef variant<int, IncrementInDtor, NonCopyable> Variant;
-  int counter = 0;
-  Variant v(0);
-  ASSERT_TRUE(absl::holds_alternative<int>(v));
-  v.emplace<IncrementInDtor>(&counter);
-  ASSERT_TRUE(absl::holds_alternative<IncrementInDtor>(v));
-  ASSERT_EQ(0, counter);
-  v.emplace<NonCopyable>();
-  ASSERT_TRUE(absl::holds_alternative<NonCopyable>(v));
-  EXPECT_EQ(1, counter);
-}
-
-TEST(VariantTest, TestMoveSemantics) {
-  typedef variant<std::unique_ptr<int>, std::unique_ptr<std::string>> Variant;
-
-  // Construct a variant by moving from an element value.
-  Variant v(absl::WrapUnique(new int(10)));
-  EXPECT_TRUE(absl::holds_alternative<std::unique_ptr<int>>(v));
-
-  // Construct a variant by moving from another variant.
-  Variant v2(absl::move(v));
-  ASSERT_TRUE(absl::holds_alternative<std::unique_ptr<int>>(v2));
-  ASSERT_NE(nullptr, absl::get<std::unique_ptr<int>>(v2));
-  EXPECT_EQ(10, *absl::get<std::unique_ptr<int>>(v2));
-
-  // Moving from a variant object leaves it holding moved-from value of the
-  // same element type.
-  EXPECT_TRUE(absl::holds_alternative<std::unique_ptr<int>>(v));
-  ASSERT_NE(nullptr, absl::get_if<std::unique_ptr<int>>(&v));
-  EXPECT_EQ(nullptr, absl::get<std::unique_ptr<int>>(v));
-
-  // Assign a variant from an element value by move.
-  v = absl::make_unique<std::string>("foo");
-  ASSERT_TRUE(absl::holds_alternative<std::unique_ptr<std::string>>(v));
-  EXPECT_EQ("foo", *absl::get<std::unique_ptr<std::string>>(v));
-
-  // Move-assign a variant.
-  v2 = absl::move(v);
-  ASSERT_TRUE(absl::holds_alternative<std::unique_ptr<std::string>>(v2));
-  EXPECT_EQ("foo", *absl::get<std::unique_ptr<std::string>>(v2));
-  EXPECT_TRUE(absl::holds_alternative<std::unique_ptr<std::string>>(v));
-}
-
-variant<int, std::string> PassThrough(const variant<int, std::string>& arg) {
-  return arg;
-}
-
-TEST(VariantTest, TestImplicitConversion) {
-  EXPECT_TRUE(absl::holds_alternative<int>(PassThrough(0)));
-
-  // We still need the explicit cast for std::string, because C++ won't apply
-  // two user-defined implicit conversions in a row.
-  EXPECT_TRUE(
-      absl::holds_alternative<std::string>(PassThrough(std::string("foo"))));
-}
-
-struct Convertible2;
-struct Convertible1 {
-  Convertible1() {}
-  Convertible1(const Convertible1&) {}
-  Convertible1& operator=(const Convertible1&) { return *this; }
-
-  // implicit conversion from Convertible2
-  Convertible1(const Convertible2&) {}  // NOLINT(runtime/explicit)
-};
-
-struct Convertible2 {
-  Convertible2() {}
-  Convertible2(const Convertible2&) {}
-  Convertible2& operator=(const Convertible2&) { return *this; }
-
-  // implicit conversion from Convertible1
-  Convertible2(const Convertible1&) {}  // NOLINT(runtime/explicit)
-};
-
-TEST(VariantTest, TestRvalueConversion) {
-#if !defined(ABSL_USES_STD_VARIANT)
-  variant<double, std::string> var(
-      ConvertVariantTo<variant<double, std::string>>(
-          variant<std::string, int>(0)));
-  ASSERT_TRUE(absl::holds_alternative<double>(var));
-  EXPECT_EQ(0.0, absl::get<double>(var));
-
-  var = ConvertVariantTo<variant<double, std::string>>(
-      variant<const char*, float>("foo"));
-  ASSERT_TRUE(absl::holds_alternative<std::string>(var));
-  EXPECT_EQ("foo", absl::get<std::string>(var));
-
-  variant<double> singleton(
-      ConvertVariantTo<variant<double>>(variant<int, float>(42)));
-  ASSERT_TRUE(absl::holds_alternative<double>(singleton));
-  EXPECT_EQ(42.0, absl::get<double>(singleton));
-
-  singleton = ConvertVariantTo<variant<double>>(variant<int, float>(3.14f));
-  ASSERT_TRUE(absl::holds_alternative<double>(singleton));
-  EXPECT_FLOAT_EQ(3.14f, static_cast<float>(absl::get<double>(singleton)));
-
-  singleton = ConvertVariantTo<variant<double>>(variant<int>(0));
-  ASSERT_TRUE(absl::holds_alternative<double>(singleton));
-  EXPECT_EQ(0.0, absl::get<double>(singleton));
-
-  variant<int32_t, uint32_t> variant2(
-      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<int32_t>(42)));
-  ASSERT_TRUE(absl::holds_alternative<int32_t>(variant2));
-  EXPECT_EQ(42, absl::get<int32_t>(variant2));
-
-  variant2 =
-      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<uint32_t>(42));
-  ASSERT_TRUE(absl::holds_alternative<uint32_t>(variant2));
-  EXPECT_EQ(42, absl::get<uint32_t>(variant2));
-#endif  // !ABSL_USES_STD_VARIANT
-
-  variant<Convertible1, Convertible2> variant3(
-      ConvertVariantTo<variant<Convertible1, Convertible2>>(
-          (variant<Convertible2, Convertible1>(Convertible1()))));
-  ASSERT_TRUE(absl::holds_alternative<Convertible1>(variant3));
-
-  variant3 = ConvertVariantTo<variant<Convertible1, Convertible2>>(
-      variant<Convertible2, Convertible1>(Convertible2()));
-  ASSERT_TRUE(absl::holds_alternative<Convertible2>(variant3));
-}
-
-TEST(VariantTest, TestLvalueConversion) {
-#if !defined(ABSL_USES_STD_VARIANT)
-  variant<std::string, int> source1 = 0;
-  variant<double, std::string> destination(
-      ConvertVariantTo<variant<double, std::string>>(source1));
-  ASSERT_TRUE(absl::holds_alternative<double>(destination));
-  EXPECT_EQ(0.0, absl::get<double>(destination));
-
-  variant<const char*, float> source2 = "foo";
-  destination = ConvertVariantTo<variant<double, std::string>>(source2);
-  ASSERT_TRUE(absl::holds_alternative<std::string>(destination));
-  EXPECT_EQ("foo", absl::get<std::string>(destination));
-
-  variant<int, float> source3(42);
-  variant<double> singleton(ConvertVariantTo<variant<double>>(source3));
-  ASSERT_TRUE(absl::holds_alternative<double>(singleton));
-  EXPECT_EQ(42.0, absl::get<double>(singleton));
-
-  source3 = 3.14f;
-  singleton = ConvertVariantTo<variant<double>>(source3);
-  ASSERT_TRUE(absl::holds_alternative<double>(singleton));
-  EXPECT_FLOAT_EQ(3.14f, static_cast<float>(absl::get<double>(singleton)));
-
-  variant<int> source4(0);
-  singleton = ConvertVariantTo<variant<double>>(source4);
-  ASSERT_TRUE(absl::holds_alternative<double>(singleton));
-  EXPECT_EQ(0.0, absl::get<double>(singleton));
-
-  variant<int32_t> source5(42);
-  variant<int32_t, uint32_t> variant2(
-      ConvertVariantTo<variant<int32_t, uint32_t>>(source5));
-  ASSERT_TRUE(absl::holds_alternative<int32_t>(variant2));
-  EXPECT_EQ(42, absl::get<int32_t>(variant2));
-
-  variant<uint32_t> source6(42);
-  variant2 = ConvertVariantTo<variant<int32_t, uint32_t>>(source6);
-  ASSERT_TRUE(absl::holds_alternative<uint32_t>(variant2));
-  EXPECT_EQ(42, absl::get<uint32_t>(variant2));
-#endif
-
-  variant<Convertible2, Convertible1> source7((Convertible1()));
-  variant<Convertible1, Convertible2> variant3(
-      ConvertVariantTo<variant<Convertible1, Convertible2>>(source7));
-  ASSERT_TRUE(absl::holds_alternative<Convertible1>(variant3));
-
-  source7 = Convertible2();
-  variant3 = ConvertVariantTo<variant<Convertible1, Convertible2>>(source7);
-  ASSERT_TRUE(absl::holds_alternative<Convertible2>(variant3));
-}
-
-TEST(VariantTest, TestMoveConversion) {
-  using Variant =
-      variant<std::unique_ptr<const int>, std::unique_ptr<const std::string>>;
-  using OtherVariant =
-      variant<std::unique_ptr<int>, std::unique_ptr<std::string>>;
-
-  Variant var(
-      ConvertVariantTo<Variant>(OtherVariant{absl::make_unique<int>(0)}));
-  ASSERT_TRUE(absl::holds_alternative<std::unique_ptr<const int>>(var));
-  ASSERT_NE(absl::get<std::unique_ptr<const int>>(var), nullptr);
-  EXPECT_EQ(0, *absl::get<std::unique_ptr<const int>>(var));
-
-  var = ConvertVariantTo<Variant>(
-      OtherVariant(absl::make_unique<std::string>("foo")));
-  ASSERT_TRUE(absl::holds_alternative<std::unique_ptr<const std::string>>(var));
-  EXPECT_EQ("foo", *absl::get<std::unique_ptr<const std::string>>(var));
-}
-
-TEST(VariantTest, DoesNotMoveFromLvalues) {
-  // We use shared_ptr here because it's both copyable and movable, and
-  // a moved-from shared_ptr is guaranteed to be null, so we can detect
-  // whether moving or copying has occurred.
-  using Variant =
-      variant<std::shared_ptr<const int>, std::shared_ptr<const std::string>>;
-  using OtherVariant =
-      variant<std::shared_ptr<int>, std::shared_ptr<std::string>>;
-
-  Variant v1(std::make_shared<const int>(0));
-
-  // Test copy constructor
-  Variant v2(v1);
-  EXPECT_EQ(absl::get<std::shared_ptr<const int>>(v1),
-            absl::get<std::shared_ptr<const int>>(v2));
-
-  // Test copy-assignment operator
-  v1 = std::make_shared<const std::string>("foo");
-  v2 = v1;
-  EXPECT_EQ(absl::get<std::shared_ptr<const std::string>>(v1),
-            absl::get<std::shared_ptr<const std::string>>(v2));
-
-  // Test converting copy constructor
-  OtherVariant other(std::make_shared<int>(0));
-  Variant v3(ConvertVariantTo<Variant>(other));
-  EXPECT_EQ(absl::get<std::shared_ptr<int>>(other),
-            absl::get<std::shared_ptr<const int>>(v3));
-
-  other = std::make_shared<std::string>("foo");
-  v3 = ConvertVariantTo<Variant>(other);
-  EXPECT_EQ(absl::get<std::shared_ptr<std::string>>(other),
-            absl::get<std::shared_ptr<const std::string>>(v3));
-}
-
-TEST(VariantTest, TestRvalueConversionViaConvertVariantTo) {
-#if !defined(ABSL_USES_STD_VARIANT)
-  variant<double, std::string> var(
-      ConvertVariantTo<variant<double, std::string>>(
-          variant<std::string, int>(3)));
-  EXPECT_THAT(absl::get_if<double>(&var), Pointee(3.0));
-
-  var = ConvertVariantTo<variant<double, std::string>>(
-      variant<const char*, float>("foo"));
-  EXPECT_THAT(absl::get_if<std::string>(&var), Pointee(std::string("foo")));
-
-  variant<double> singleton(
-      ConvertVariantTo<variant<double>>(variant<int, float>(42)));
-  EXPECT_THAT(absl::get_if<double>(&singleton), Pointee(42.0));
-
-  singleton = ConvertVariantTo<variant<double>>(variant<int, float>(3.14f));
-  EXPECT_THAT(absl::get_if<double>(&singleton), Pointee(DoubleEq(3.14f)));
-
-  singleton = ConvertVariantTo<variant<double>>(variant<int>(3));
-  EXPECT_THAT(absl::get_if<double>(&singleton), Pointee(3.0));
-
-  variant<int32_t, uint32_t> variant2(
-      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<int32_t>(42)));
-  EXPECT_THAT(absl::get_if<int32_t>(&variant2), Pointee(42));
-
-  variant2 =
-      ConvertVariantTo<variant<int32_t, uint32_t>>(variant<uint32_t>(42));
-  EXPECT_THAT(absl::get_if<uint32_t>(&variant2), Pointee(42));
-#endif
-
-  variant<Convertible1, Convertible2> variant3(
-      ConvertVariantTo<variant<Convertible1, Convertible2>>(
-          (variant<Convertible2, Convertible1>(Convertible1()))));
-  ASSERT_TRUE(absl::holds_alternative<Convertible1>(variant3));
-
-  variant3 = ConvertVariantTo<variant<Convertible1, Convertible2>>(
-      variant<Convertible2, Convertible1>(Convertible2()));
-  ASSERT_TRUE(absl::holds_alternative<Convertible2>(variant3));
-}
-
-TEST(VariantTest, TestLvalueConversionViaConvertVariantTo) {
-#if !defined(ABSL_USES_STD_VARIANT)
-  variant<std::string, int> source1 = 3;
-  variant<double, std::string> destination(
-      ConvertVariantTo<variant<double, std::string>>(source1));
-  EXPECT_THAT(absl::get_if<double>(&destination), Pointee(3.0));
-
-  variant<const char*, float> source2 = "foo";
-  destination = ConvertVariantTo<variant<double, std::string>>(source2);
-  EXPECT_THAT(absl::get_if<std::string>(&destination),
-              Pointee(std::string("foo")));
-
-  variant<int, float> source3(42);
-  variant<double> singleton(ConvertVariantTo<variant<double>>(source3));
-  EXPECT_THAT(absl::get_if<double>(&singleton), Pointee(42.0));
-
-  source3 = 3.14f;
-  singleton = ConvertVariantTo<variant<double>>(source3);
-  EXPECT_FLOAT_EQ(3.14f, static_cast<float>(absl::get<double>(singleton)));
-  EXPECT_THAT(absl::get_if<double>(&singleton), Pointee(DoubleEq(3.14f)));
-
-  variant<int> source4(3);
-  singleton = ConvertVariantTo<variant<double>>(source4);
-  EXPECT_THAT(absl::get_if<double>(&singleton), Pointee(3.0));
-
-  variant<int32_t> source5(42);
-  variant<int32_t, uint32_t> variant2(
-      ConvertVariantTo<variant<int32_t, uint32_t>>(source5));
-  EXPECT_THAT(absl::get_if<int32_t>(&variant2), Pointee(42));
-
-  variant<uint32_t> source6(42);
-  variant2 = ConvertVariantTo<variant<int32_t, uint32_t>>(source6);
-  EXPECT_THAT(absl::get_if<uint32_t>(&variant2), Pointee(42));
-#endif  // !ABSL_USES_STD_VARIANT
-
-  variant<Convertible2, Convertible1> source7((Convertible1()));
-  variant<Convertible1, Convertible2> variant3(
-      ConvertVariantTo<variant<Convertible1, Convertible2>>(source7));
-  ASSERT_TRUE(absl::holds_alternative<Convertible1>(variant3));
-
-  source7 = Convertible2();
-  variant3 = ConvertVariantTo<variant<Convertible1, Convertible2>>(source7);
-  ASSERT_TRUE(absl::holds_alternative<Convertible2>(variant3));
-}
-
-TEST(VariantTest, TestMoveConversionViaConvertVariantTo) {
-  using Variant =
-      variant<std::unique_ptr<const int>, std::unique_ptr<const std::string>>;
-  using OtherVariant =
-      variant<std::unique_ptr<int>, std::unique_ptr<std::string>>;
-
-  Variant var(
-      ConvertVariantTo<Variant>(OtherVariant{absl::make_unique<int>(3)}));
-  EXPECT_THAT(absl::get_if<std::unique_ptr<const int>>(&var),
-              Pointee(Pointee(3)));
-
-  var = ConvertVariantTo<Variant>(
-      OtherVariant(absl::make_unique<std::string>("foo")));
-  EXPECT_THAT(absl::get_if<std::unique_ptr<const std::string>>(&var),
-              Pointee(Pointee(std::string("foo"))));
-}
-
-// If all alternatives are trivially copy/move constructible, variant should
-// also be trivially copy/move constructible. This is not required by the
-// standard and we know that libstdc++ variant doesn't have this feature.
-// For more details see the paper:
-// http://open-std.org/JTC1/SC22/WG21/docs/papers/2017/p0602r0.html
-#if !(defined(ABSL_USES_STD_VARIANT) && defined(__GLIBCXX__))
-#define ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY 1
-#endif
-
-TEST(VariantTest, TestCopyAndMoveTypeTraits) {
-  EXPECT_TRUE(std::is_copy_constructible<variant<std::string>>::value);
-  EXPECT_TRUE(absl::is_copy_assignable<variant<std::string>>::value);
-  EXPECT_TRUE(std::is_move_constructible<variant<std::string>>::value);
-  EXPECT_TRUE(absl::is_move_assignable<variant<std::string>>::value);
-  EXPECT_TRUE(std::is_move_constructible<variant<std::unique_ptr<int>>>::value);
-  EXPECT_TRUE(absl::is_move_assignable<variant<std::unique_ptr<int>>>::value);
-  EXPECT_FALSE(
-      std::is_copy_constructible<variant<std::unique_ptr<int>>>::value);
-  EXPECT_FALSE(absl::is_copy_assignable<variant<std::unique_ptr<int>>>::value);
-
-  EXPECT_FALSE(
-      absl::is_trivially_copy_constructible<variant<std::string>>::value);
-  EXPECT_FALSE(absl::is_trivially_copy_assignable<variant<std::string>>::value);
-#if ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY
-  EXPECT_TRUE(absl::is_trivially_copy_constructible<variant<int>>::value);
-  EXPECT_TRUE(absl::is_trivially_copy_assignable<variant<int>>::value);
-  EXPECT_TRUE(is_trivially_move_constructible<variant<int>>::value);
-  EXPECT_TRUE(is_trivially_move_assignable<variant<int>>::value);
-#endif  // ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY
-}
-
-TEST(VariantTest, TestVectorOfMoveonlyVariant) {
-  // Verify that variant<MoveonlyType> works correctly as a std::vector element.
-  std::vector<variant<std::unique_ptr<int>, std::string>> vec;
-  vec.push_back(absl::make_unique<int>(42));
-  vec.emplace_back("Hello");
-  vec.reserve(3);
-  auto another_vec = absl::move(vec);
-  // As a sanity check, verify vector contents.
-  ASSERT_EQ(2, another_vec.size());
-  EXPECT_EQ(42, *absl::get<std::unique_ptr<int>>(another_vec[0]));
-  EXPECT_EQ("Hello", absl::get<std::string>(another_vec[1]));
-}
-
-TEST(VariantTest, NestedVariant) {
-#if ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY
-  static_assert(absl::is_trivially_copy_constructible<variant<int>>(), "");
-  static_assert(absl::is_trivially_copy_assignable<variant<int>>(), "");
-  static_assert(is_trivially_move_constructible<variant<int>>(), "");
-  static_assert(is_trivially_move_assignable<variant<int>>(), "");
-
-  static_assert(absl::is_trivially_copy_constructible<variant<variant<int>>>(),
-                "");
-  static_assert(absl::is_trivially_copy_assignable<variant<variant<int>>>(),
-                "");
-  static_assert(is_trivially_move_constructible<variant<variant<int>>>(), "");
-  static_assert(is_trivially_move_assignable<variant<variant<int>>>(), "");
-#endif  // ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY
-
-  variant<int> x(42);
-  variant<variant<int>> y(x);
-  variant<variant<int>> z(y);
-  EXPECT_TRUE(absl::holds_alternative<variant<int>>(z));
-  EXPECT_EQ(x, absl::get<variant<int>>(z));
-}
-
-struct TriviallyDestructible {
-  TriviallyDestructible(TriviallyDestructible&&) {}
-  TriviallyDestructible(const TriviallyDestructible&) {}
-  TriviallyDestructible& operator=(TriviallyDestructible&&) { return *this; }
-  TriviallyDestructible& operator=(const TriviallyDestructible&) {
-    return *this;
-  }
-};
-
-struct TriviallyMovable {
-  TriviallyMovable(TriviallyMovable&&) = default;
-  TriviallyMovable(TriviallyMovable const&) {}
-  TriviallyMovable& operator=(const TriviallyMovable&) { return *this; }
-};
-
-struct TriviallyCopyable {
-  TriviallyCopyable(const TriviallyCopyable&) = default;
-  TriviallyCopyable& operator=(const TriviallyCopyable&) { return *this; }
-};
-
-struct TriviallyMoveAssignable {
-  TriviallyMoveAssignable(TriviallyMoveAssignable&&) = default;
-  TriviallyMoveAssignable(const TriviallyMoveAssignable&) {}
-  TriviallyMoveAssignable& operator=(TriviallyMoveAssignable&&) = default;
-  TriviallyMoveAssignable& operator=(const TriviallyMoveAssignable&) {
-    return *this;
-  }
-};
-
-struct TriviallyCopyAssignable {};
-
-#if ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY
-TEST(VariantTest, TestTriviality) {
-  {
-    using TrivDestVar = absl::variant<TriviallyDestructible>;
-
-    EXPECT_FALSE(is_trivially_move_constructible<TrivDestVar>::value);
-    EXPECT_FALSE(absl::is_trivially_copy_constructible<TrivDestVar>::value);
-    EXPECT_FALSE(is_trivially_move_assignable<TrivDestVar>::value);
-    EXPECT_FALSE(absl::is_trivially_copy_assignable<TrivDestVar>::value);
-    EXPECT_TRUE(absl::is_trivially_destructible<TrivDestVar>::value);
-  }
-
-  {
-    using TrivMoveVar = absl::variant<TriviallyMovable>;
-
-    EXPECT_TRUE(is_trivially_move_constructible<TrivMoveVar>::value);
-    EXPECT_FALSE(absl::is_trivially_copy_constructible<TrivMoveVar>::value);
-    EXPECT_FALSE(is_trivially_move_assignable<TrivMoveVar>::value);
-    EXPECT_FALSE(absl::is_trivially_copy_assignable<TrivMoveVar>::value);
-    EXPECT_TRUE(absl::is_trivially_destructible<TrivMoveVar>::value);
-  }
-
-  {
-    using TrivCopyVar = absl::variant<TriviallyCopyable>;
-
-    EXPECT_TRUE(is_trivially_move_constructible<TrivCopyVar>::value);
-    EXPECT_TRUE(absl::is_trivially_copy_constructible<TrivCopyVar>::value);
-    EXPECT_FALSE(is_trivially_move_assignable<TrivCopyVar>::value);
-    EXPECT_FALSE(absl::is_trivially_copy_assignable<TrivCopyVar>::value);
-    EXPECT_TRUE(absl::is_trivially_destructible<TrivCopyVar>::value);
-  }
-
-  {
-    using TrivMoveAssignVar = absl::variant<TriviallyMoveAssignable>;
-
-    EXPECT_TRUE(is_trivially_move_constructible<TrivMoveAssignVar>::value);
-    EXPECT_FALSE(
-        absl::is_trivially_copy_constructible<TrivMoveAssignVar>::value);
-    EXPECT_TRUE(is_trivially_move_assignable<TrivMoveAssignVar>::value);
-    EXPECT_FALSE(absl::is_trivially_copy_assignable<TrivMoveAssignVar>::value);
-    EXPECT_TRUE(absl::is_trivially_destructible<TrivMoveAssignVar>::value);
-  }
-
-  {
-    using TrivCopyAssignVar = absl::variant<TriviallyCopyAssignable>;
-
-    EXPECT_TRUE(is_trivially_move_constructible<TrivCopyAssignVar>::value);
-    EXPECT_TRUE(
-        absl::is_trivially_copy_constructible<TrivCopyAssignVar>::value);
-    EXPECT_TRUE(is_trivially_move_assignable<TrivCopyAssignVar>::value);
-    EXPECT_TRUE(absl::is_trivially_copy_assignable<TrivCopyAssignVar>::value);
-    EXPECT_TRUE(absl::is_trivially_destructible<TrivCopyAssignVar>::value);
-  }
-}
-#endif  // ABSL_VARIANT_PROPAGATE_COPY_MOVE_TRIVIALITY
-
-// To verify that absl::variant correctly use the nontrivial move ctor of its
-// member rather than use the trivial copy constructor.
-TEST(VariantTest, MoveCtorBug) {
-  // To simulate std::tuple in libstdc++.
-  struct TrivialCopyNontrivialMove {
-    TrivialCopyNontrivialMove() = default;
-    TrivialCopyNontrivialMove(const TrivialCopyNontrivialMove&) = default;
-    TrivialCopyNontrivialMove(TrivialCopyNontrivialMove&&) { called = true; }
-    bool called = false;
-  };
-  {
-    using V = absl::variant<TrivialCopyNontrivialMove, int>;
-    V v1(absl::in_place_index<0>);
-    // this should invoke the move ctor, rather than the trivial copy ctor.
-    V v2(std::move(v1));
-    EXPECT_TRUE(absl::get<0>(v2).called);
-  }
-  {
-    // this case failed to compile before our fix due to a GCC bug.
-    using V = absl::variant<int, TrivialCopyNontrivialMove>;
-    V v1(absl::in_place_index<1>);
-    // this should invoke the move ctor, rather than the trivial copy ctor.
-    V v2(std::move(v1));
-    EXPECT_TRUE(absl::get<1>(v2).called);
-  }
-}
-
-}  // namespace
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // #if !defined(ABSL_USES_STD_VARIANT)
diff --git a/third_party/abseil/absl/utility/BUILD.bazel b/third_party/abseil/absl/utility/BUILD.bazel
deleted file mode 100644
index 02b2c40..0000000
--- a/third_party/abseil/absl/utility/BUILD.bazel
+++ /dev/null
@@ -1,55 +0,0 @@
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-load(
-    "//absl:copts/configure_copts.bzl",
-    "ABSL_DEFAULT_COPTS",
-    "ABSL_DEFAULT_LINKOPTS",
-    "ABSL_TEST_COPTS",
-)
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-cc_library(
-    name = "utility",
-    hdrs = [
-        "utility.h",
-    ],
-    copts = ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        "//absl/base:base_internal",
-        "//absl/base:config",
-        "//absl/meta:type_traits",
-    ],
-)
-
-cc_test(
-    name = "utility_test",
-    srcs = ["utility_test.cc"],
-    copts = ABSL_TEST_COPTS,
-    linkopts = ABSL_DEFAULT_LINKOPTS,
-    deps = [
-        ":utility",
-        "//absl/base:core_headers",
-        "//absl/memory",
-        "//absl/strings",
-        "@com_google_googletest//:gtest_main",
-    ],
-)
diff --git a/third_party/abseil/absl/utility/CMakeLists.txt b/third_party/abseil/absl/utility/CMakeLists.txt
deleted file mode 100644
index e1edd19..0000000
--- a/third_party/abseil/absl/utility/CMakeLists.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-#
-# Copyright 2017 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-absl_cc_library(
-  NAME
-    utility
-  HDRS
-    "utility.h"
-  COPTS
-    ${ABSL_DEFAULT_COPTS}
-  DEPS
-    absl::base_internal
-    absl::config
-    absl::type_traits
-  PUBLIC
-)
-
-absl_cc_test(
-  NAME
-    utility_test
-  SRCS
-    "utility_test.cc"
-  COPTS
-    ${ABSL_TEST_COPTS}
-  DEPS
-    absl::utility
-    absl::core_headers
-    absl::memory
-    absl::strings
-    gmock_main
-)
diff --git a/third_party/abseil/absl/utility/utility.h b/third_party/abseil/absl/utility/utility.h
deleted file mode 100644
index bf92322..0000000
--- a/third_party/abseil/absl/utility/utility.h
+++ /dev/null
@@ -1,350 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// This header file contains C++11 versions of standard <utility> header
-// abstractions available within C++14 and C++17, and are designed to be drop-in
-// replacement for code compliant with C++14 and C++17.
-//
-// The following abstractions are defined:
-//
-//   * integer_sequence<T, Ints...>  == std::integer_sequence<T, Ints...>
-//   * index_sequence<Ints...>       == std::index_sequence<Ints...>
-//   * make_integer_sequence<T, N>   == std::make_integer_sequence<T, N>
-//   * make_index_sequence<N>        == std::make_index_sequence<N>
-//   * index_sequence_for<Ts...>     == std::index_sequence_for<Ts...>
-//   * apply<Functor, Tuple>         == std::apply<Functor, Tuple>
-//   * exchange<T>                   == std::exchange<T>
-//   * make_from_tuple<T>            == std::make_from_tuple<T>
-//
-// This header file also provides the tag types `in_place_t`, `in_place_type_t`,
-// and `in_place_index_t`, as well as the constant `in_place`, and
-// `constexpr` `std::move()` and `std::forward()` implementations in C++11.
-//
-// References:
-//
-//  https://en.cppreference.com/w/cpp/utility/integer_sequence
-//  https://en.cppreference.com/w/cpp/utility/apply
-//  http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3658.html
-
-#ifndef ABSL_UTILITY_UTILITY_H_
-#define ABSL_UTILITY_UTILITY_H_
-
-#include <cstddef>
-#include <cstdlib>
-#include <tuple>
-#include <utility>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/inline_variable.h"
-#include "absl/base/internal/invoke.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-// integer_sequence
-//
-// Class template representing a compile-time integer sequence. An instantiation
-// of `integer_sequence<T, Ints...>` has a sequence of integers encoded in its
-// type through its template arguments (which is a common need when
-// working with C++11 variadic templates). `absl::integer_sequence` is designed
-// to be a drop-in replacement for C++14's `std::integer_sequence`.
-//
-// Example:
-//
-//   template< class T, T... Ints >
-//   void user_function(integer_sequence<T, Ints...>);
-//
-//   int main()
-//   {
-//     // user_function's `T` will be deduced to `int` and `Ints...`
-//     // will be deduced to `0, 1, 2, 3, 4`.
-//     user_function(make_integer_sequence<int, 5>());
-//   }
-template <typename T, T... Ints>
-struct integer_sequence {
-  using value_type = T;
-  static constexpr size_t size() noexcept { return sizeof...(Ints); }
-};
-
-// index_sequence
-//
-// A helper template for an `integer_sequence` of `size_t`,
-// `absl::index_sequence` is designed to be a drop-in replacement for C++14's
-// `std::index_sequence`.
-template <size_t... Ints>
-using index_sequence = integer_sequence<size_t, Ints...>;
-
-namespace utility_internal {
-
-template <typename Seq, size_t SeqSize, size_t Rem>
-struct Extend;
-
-// Note that SeqSize == sizeof...(Ints). It's passed explicitly for efficiency.
-template <typename T, T... Ints, size_t SeqSize>
-struct Extend<integer_sequence<T, Ints...>, SeqSize, 0> {
-  using type = integer_sequence<T, Ints..., (Ints + SeqSize)...>;
-};
-
-template <typename T, T... Ints, size_t SeqSize>
-struct Extend<integer_sequence<T, Ints...>, SeqSize, 1> {
-  using type = integer_sequence<T, Ints..., (Ints + SeqSize)..., 2 * SeqSize>;
-};
-
-// Recursion helper for 'make_integer_sequence<T, N>'.
-// 'Gen<T, N>::type' is an alias for 'integer_sequence<T, 0, 1, ... N-1>'.
-template <typename T, size_t N>
-struct Gen {
-  using type =
-      typename Extend<typename Gen<T, N / 2>::type, N / 2, N % 2>::type;
-};
-
-template <typename T>
-struct Gen<T, 0> {
-  using type = integer_sequence<T>;
-};
-
-template <typename T>
-struct InPlaceTypeTag {
-  explicit InPlaceTypeTag() = delete;
-  InPlaceTypeTag(const InPlaceTypeTag&) = delete;
-  InPlaceTypeTag& operator=(const InPlaceTypeTag&) = delete;
-};
-
-template <size_t I>
-struct InPlaceIndexTag {
-  explicit InPlaceIndexTag() = delete;
-  InPlaceIndexTag(const InPlaceIndexTag&) = delete;
-  InPlaceIndexTag& operator=(const InPlaceIndexTag&) = delete;
-};
-
-}  // namespace utility_internal
-
-// Compile-time sequences of integers
-
-// make_integer_sequence
-//
-// This template alias is equivalent to
-// `integer_sequence<int, 0, 1, ..., N-1>`, and is designed to be a drop-in
-// replacement for C++14's `std::make_integer_sequence`.
-template <typename T, T N>
-using make_integer_sequence = typename utility_internal::Gen<T, N>::type;
-
-// make_index_sequence
-//
-// This template alias is equivalent to `index_sequence<0, 1, ..., N-1>`,
-// and is designed to be a drop-in replacement for C++14's
-// `std::make_index_sequence`.
-template <size_t N>
-using make_index_sequence = make_integer_sequence<size_t, N>;
-
-// index_sequence_for
-//
-// Converts a typename pack into an index sequence of the same length, and
-// is designed to be a drop-in replacement for C++14's
-// `std::index_sequence_for()`
-template <typename... Ts>
-using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
-
-// Tag types
-
-#ifdef ABSL_USES_STD_OPTIONAL
-
-using std::in_place_t;
-using std::in_place;
-
-#else  // ABSL_USES_STD_OPTIONAL
-
-// in_place_t
-//
-// Tag type used to specify in-place construction, such as with
-// `absl::optional`, designed to be a drop-in replacement for C++17's
-// `std::in_place_t`.
-struct in_place_t {};
-
-ABSL_INTERNAL_INLINE_CONSTEXPR(in_place_t, in_place, {});
-
-#endif  // ABSL_USES_STD_OPTIONAL
-
-#if defined(ABSL_USES_STD_ANY) || defined(ABSL_USES_STD_VARIANT)
-using std::in_place_type;
-using std::in_place_type_t;
-#else
-
-// in_place_type_t
-//
-// Tag type used for in-place construction when the type to construct needs to
-// be specified, such as with `absl::any`, designed to be a drop-in replacement
-// for C++17's `std::in_place_type_t`.
-template <typename T>
-using in_place_type_t = void (*)(utility_internal::InPlaceTypeTag<T>);
-
-template <typename T>
-void in_place_type(utility_internal::InPlaceTypeTag<T>) {}
-#endif  // ABSL_USES_STD_ANY || ABSL_USES_STD_VARIANT
-
-#ifdef ABSL_USES_STD_VARIANT
-using std::in_place_index;
-using std::in_place_index_t;
-#else
-
-// in_place_index_t
-//
-// Tag type used for in-place construction when the type to construct needs to
-// be specified, such as with `absl::any`, designed to be a drop-in replacement
-// for C++17's `std::in_place_index_t`.
-template <size_t I>
-using in_place_index_t = void (*)(utility_internal::InPlaceIndexTag<I>);
-
-template <size_t I>
-void in_place_index(utility_internal::InPlaceIndexTag<I>) {}
-#endif  // ABSL_USES_STD_VARIANT
-
-// Constexpr move and forward
-
-// move()
-//
-// A constexpr version of `std::move()`, designed to be a drop-in replacement
-// for C++14's `std::move()`.
-template <typename T>
-constexpr absl::remove_reference_t<T>&& move(T&& t) noexcept {
-  return static_cast<absl::remove_reference_t<T>&&>(t);
-}
-
-// forward()
-//
-// A constexpr version of `std::forward()`, designed to be a drop-in replacement
-// for C++14's `std::forward()`.
-template <typename T>
-constexpr T&& forward(
-    absl::remove_reference_t<T>& t) noexcept {  // NOLINT(runtime/references)
-  return static_cast<T&&>(t);
-}
-
-namespace utility_internal {
-// Helper method for expanding tuple into a called method.
-template <typename Functor, typename Tuple, std::size_t... Indexes>
-auto apply_helper(Functor&& functor, Tuple&& t, index_sequence<Indexes...>)
-    -> decltype(absl::base_internal::invoke(
-        absl::forward<Functor>(functor),
-        std::get<Indexes>(absl::forward<Tuple>(t))...)) {
-  return absl::base_internal::invoke(
-      absl::forward<Functor>(functor),
-      std::get<Indexes>(absl::forward<Tuple>(t))...);
-}
-
-}  // namespace utility_internal
-
-// apply
-//
-// Invokes a Callable using elements of a tuple as its arguments.
-// Each element of the tuple corresponds to an argument of the call (in order).
-// Both the Callable argument and the tuple argument are perfect-forwarded.
-// For member-function Callables, the first tuple element acts as the `this`
-// pointer. `absl::apply` is designed to be a drop-in replacement for C++17's
-// `std::apply`. Unlike C++17's `std::apply`, this is not currently `constexpr`.
-//
-// Example:
-//
-//   class Foo {
-//    public:
-//     void Bar(int);
-//   };
-//   void user_function1(int, std::string);
-//   void user_function2(std::unique_ptr<Foo>);
-//   auto user_lambda = [](int, int) {};
-//
-//   int main()
-//   {
-//       std::tuple<int, std::string> tuple1(42, "bar");
-//       // Invokes the first user function on int, std::string.
-//       absl::apply(&user_function1, tuple1);
-//
-//       std::tuple<std::unique_ptr<Foo>> tuple2(absl::make_unique<Foo>());
-//       // Invokes the user function that takes ownership of the unique
-//       // pointer.
-//       absl::apply(&user_function2, std::move(tuple2));
-//
-//       auto foo = absl::make_unique<Foo>();
-//       std::tuple<Foo*, int> tuple3(foo.get(), 42);
-//       // Invokes the method Bar on foo with one argument, 42.
-//       absl::apply(&Foo::Bar, tuple3);
-//
-//       std::tuple<int, int> tuple4(8, 9);
-//       // Invokes a lambda.
-//       absl::apply(user_lambda, tuple4);
-//   }
-template <typename Functor, typename Tuple>
-auto apply(Functor&& functor, Tuple&& t)
-    -> decltype(utility_internal::apply_helper(
-        absl::forward<Functor>(functor), absl::forward<Tuple>(t),
-        absl::make_index_sequence<std::tuple_size<
-            typename std::remove_reference<Tuple>::type>::value>{})) {
-  return utility_internal::apply_helper(
-      absl::forward<Functor>(functor), absl::forward<Tuple>(t),
-      absl::make_index_sequence<std::tuple_size<
-          typename std::remove_reference<Tuple>::type>::value>{});
-}
-
-// exchange
-//
-// Replaces the value of `obj` with `new_value` and returns the old value of
-// `obj`.  `absl::exchange` is designed to be a drop-in replacement for C++14's
-// `std::exchange`.
-//
-// Example:
-//
-//   Foo& operator=(Foo&& other) {
-//     ptr1_ = absl::exchange(other.ptr1_, nullptr);
-//     int1_ = absl::exchange(other.int1_, -1);
-//     return *this;
-//   }
-template <typename T, typename U = T>
-T exchange(T& obj, U&& new_value) {
-  T old_value = absl::move(obj);
-  obj = absl::forward<U>(new_value);
-  return old_value;
-}
-
-namespace utility_internal {
-template <typename T, typename Tuple, size_t... I>
-T make_from_tuple_impl(Tuple&& tup, absl::index_sequence<I...>) {
-  return T(std::get<I>(std::forward<Tuple>(tup))...);
-}
-}  // namespace utility_internal
-
-// make_from_tuple
-//
-// Given the template parameter type `T` and a tuple of arguments
-// `std::tuple(arg0, arg1, ..., argN)` constructs an object of type `T` as if by
-// calling `T(arg0, arg1, ..., argN)`.
-//
-// Example:
-//
-//   std::tuple<const char*, size_t> args("hello world", 5);
-//   auto s = absl::make_from_tuple<std::string>(args);
-//   assert(s == "hello");
-//
-template <typename T, typename Tuple>
-constexpr T make_from_tuple(Tuple&& tup) {
-  return utility_internal::make_from_tuple_impl<T>(
-      std::forward<Tuple>(tup),
-      absl::make_index_sequence<
-          std::tuple_size<absl::decay_t<Tuple>>::value>{});
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_UTILITY_UTILITY_H_
diff --git a/third_party/abseil/absl/utility/utility_test.cc b/third_party/abseil/absl/utility/utility_test.cc
deleted file mode 100644
index f044ad6..0000000
--- a/third_party/abseil/absl/utility/utility_test.cc
+++ /dev/null
@@ -1,376 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/utility/utility.h"
-
-#include <sstream>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/attributes.h"
-#include "absl/memory/memory.h"
-#include "absl/strings/str_cat.h"
-
-namespace {
-
-#ifdef _MSC_VER
-// Warnings for unused variables in this test are false positives.  On other
-// platforms, they are suppressed by ABSL_ATTRIBUTE_UNUSED, but that doesn't
-// work on MSVC.
-// Both the unused variables and the name length warnings are due to calls
-// to absl::make_index_sequence with very large values, creating very long type
-// names. The resulting warnings are so long they make build output unreadable.
-#pragma warning( push )
-#pragma warning( disable : 4503 )  // decorated name length exceeded
-#pragma warning( disable : 4101 )  // unreferenced local variable
-#endif  // _MSC_VER
-
-using ::testing::ElementsAre;
-using ::testing::Pointee;
-using ::testing::StaticAssertTypeEq;
-
-TEST(IntegerSequenceTest, ValueType) {
-  StaticAssertTypeEq<int, absl::integer_sequence<int>::value_type>();
-  StaticAssertTypeEq<char, absl::integer_sequence<char>::value_type>();
-}
-
-TEST(IntegerSequenceTest, Size) {
-  EXPECT_EQ(0, (absl::integer_sequence<int>::size()));
-  EXPECT_EQ(1, (absl::integer_sequence<int, 0>::size()));
-  EXPECT_EQ(1, (absl::integer_sequence<int, 1>::size()));
-  EXPECT_EQ(2, (absl::integer_sequence<int, 1, 2>::size()));
-  EXPECT_EQ(3, (absl::integer_sequence<int, 0, 1, 2>::size()));
-  EXPECT_EQ(3, (absl::integer_sequence<int, -123, 123, 456>::size()));
-  constexpr size_t sz = absl::integer_sequence<int, 0, 1>::size();
-  EXPECT_EQ(2, sz);
-}
-
-TEST(IntegerSequenceTest, MakeIndexSequence) {
-  StaticAssertTypeEq<absl::index_sequence<>, absl::make_index_sequence<0>>();
-  StaticAssertTypeEq<absl::index_sequence<0>, absl::make_index_sequence<1>>();
-  StaticAssertTypeEq<absl::index_sequence<0, 1>,
-                     absl::make_index_sequence<2>>();
-  StaticAssertTypeEq<absl::index_sequence<0, 1, 2>,
-                     absl::make_index_sequence<3>>();
-}
-
-TEST(IntegerSequenceTest, MakeIntegerSequence) {
-  StaticAssertTypeEq<absl::integer_sequence<int>,
-                     absl::make_integer_sequence<int, 0>>();
-  StaticAssertTypeEq<absl::integer_sequence<int, 0>,
-                     absl::make_integer_sequence<int, 1>>();
-  StaticAssertTypeEq<absl::integer_sequence<int, 0, 1>,
-                     absl::make_integer_sequence<int, 2>>();
-  StaticAssertTypeEq<absl::integer_sequence<int, 0, 1, 2>,
-                     absl::make_integer_sequence<int, 3>>();
-}
-
-template <typename... Ts>
-class Counter {};
-
-template <size_t... Is>
-void CountAll(absl::index_sequence<Is...>) {
-  // We only need an alias here, but instantiate a variable to silence warnings
-  // for unused typedefs in some compilers.
-  ABSL_ATTRIBUTE_UNUSED Counter<absl::make_index_sequence<Is>...> seq;
-}
-
-// This test verifies that absl::make_index_sequence can handle large arguments
-// without blowing up template instantiation stack, going OOM or taking forever
-// to compile (there is hard 15 minutes limit imposed by forge).
-TEST(IntegerSequenceTest, MakeIndexSequencePerformance) {
-  // O(log N) template instantiations.
-  // We only need an alias here, but instantiate a variable to silence warnings
-  // for unused typedefs in some compilers.
-  ABSL_ATTRIBUTE_UNUSED absl::make_index_sequence<(1 << 16) - 1> seq;
-  // O(N) template instantiations.
-  CountAll(absl::make_index_sequence<(1 << 8) - 1>());
-}
-
-template <typename F, typename Tup, size_t... Is>
-auto ApplyFromTupleImpl(F f, const Tup& tup, absl::index_sequence<Is...>)
-    -> decltype(f(std::get<Is>(tup)...)) {
-  return f(std::get<Is>(tup)...);
-}
-
-template <typename Tup>
-using TupIdxSeq = absl::make_index_sequence<std::tuple_size<Tup>::value>;
-
-template <typename F, typename Tup>
-auto ApplyFromTuple(F f, const Tup& tup)
-    -> decltype(ApplyFromTupleImpl(f, tup, TupIdxSeq<Tup>{})) {
-  return ApplyFromTupleImpl(f, tup, TupIdxSeq<Tup>{});
-}
-
-template <typename T>
-std::string Fmt(const T& x) {
-  std::ostringstream os;
-  os << x;
-  return os.str();
-}
-
-struct PoorStrCat {
-  template <typename... Args>
-  std::string operator()(const Args&... args) const {
-    std::string r;
-    for (const auto& e : {Fmt(args)...}) r += e;
-    return r;
-  }
-};
-
-template <typename Tup, size_t... Is>
-std::vector<std::string> TupStringVecImpl(const Tup& tup,
-                                          absl::index_sequence<Is...>) {
-  return {Fmt(std::get<Is>(tup))...};
-}
-
-template <typename... Ts>
-std::vector<std::string> TupStringVec(const std::tuple<Ts...>& tup) {
-  return TupStringVecImpl(tup, absl::index_sequence_for<Ts...>());
-}
-
-TEST(MakeIndexSequenceTest, ApplyFromTupleExample) {
-  PoorStrCat f{};
-  EXPECT_EQ("12abc3.14", f(12, "abc", 3.14));
-  EXPECT_EQ("12abc3.14", ApplyFromTuple(f, std::make_tuple(12, "abc", 3.14)));
-}
-
-TEST(IndexSequenceForTest, Basic) {
-  StaticAssertTypeEq<absl::index_sequence<>, absl::index_sequence_for<>>();
-  StaticAssertTypeEq<absl::index_sequence<0>, absl::index_sequence_for<int>>();
-  StaticAssertTypeEq<absl::index_sequence<0, 1, 2, 3>,
-                     absl::index_sequence_for<int, void, char, int>>();
-}
-
-TEST(IndexSequenceForTest, Example) {
-  EXPECT_THAT(TupStringVec(std::make_tuple(12, "abc", 3.14)),
-              ElementsAre("12", "abc", "3.14"));
-}
-
-int Function(int a, int b) { return a - b; }
-
-int Sink(std::unique_ptr<int> p) { return *p; }
-
-std::unique_ptr<int> Factory(int n) { return absl::make_unique<int>(n); }
-
-void NoOp() {}
-
-struct ConstFunctor {
-  int operator()(int a, int b) const { return a - b; }
-};
-
-struct MutableFunctor {
-  int operator()(int a, int b) { return a - b; }
-};
-
-struct EphemeralFunctor {
-  EphemeralFunctor() {}
-  EphemeralFunctor(const EphemeralFunctor&) {}
-  EphemeralFunctor(EphemeralFunctor&&) {}
-  int operator()(int a, int b) && { return a - b; }
-};
-
-struct OverloadedFunctor {
-  OverloadedFunctor() {}
-  OverloadedFunctor(const OverloadedFunctor&) {}
-  OverloadedFunctor(OverloadedFunctor&&) {}
-  template <typename... Args>
-  std::string operator()(const Args&... args) & {
-    return absl::StrCat("&", args...);
-  }
-  template <typename... Args>
-  std::string operator()(const Args&... args) const& {
-    return absl::StrCat("const&", args...);
-  }
-  template <typename... Args>
-  std::string operator()(const Args&... args) && {
-    return absl::StrCat("&&", args...);
-  }
-};
-
-struct Class {
-  int Method(int a, int b) { return a - b; }
-  int ConstMethod(int a, int b) const { return a - b; }
-
-  int member;
-};
-
-struct FlipFlop {
-  int ConstMethod() const { return member; }
-  FlipFlop operator*() const { return {-member}; }
-
-  int member;
-};
-
-TEST(ApplyTest, Function) {
-  EXPECT_EQ(1, absl::apply(Function, std::make_tuple(3, 2)));
-  EXPECT_EQ(1, absl::apply(&Function, std::make_tuple(3, 2)));
-}
-
-TEST(ApplyTest, NonCopyableArgument) {
-  EXPECT_EQ(42, absl::apply(Sink, std::make_tuple(absl::make_unique<int>(42))));
-}
-
-TEST(ApplyTest, NonCopyableResult) {
-  EXPECT_THAT(absl::apply(Factory, std::make_tuple(42)),
-              ::testing::Pointee(42));
-}
-
-TEST(ApplyTest, VoidResult) { absl::apply(NoOp, std::tuple<>()); }
-
-TEST(ApplyTest, ConstFunctor) {
-  EXPECT_EQ(1, absl::apply(ConstFunctor(), std::make_tuple(3, 2)));
-}
-
-TEST(ApplyTest, MutableFunctor) {
-  MutableFunctor f;
-  EXPECT_EQ(1, absl::apply(f, std::make_tuple(3, 2)));
-  EXPECT_EQ(1, absl::apply(MutableFunctor(), std::make_tuple(3, 2)));
-}
-TEST(ApplyTest, EphemeralFunctor) {
-  EphemeralFunctor f;
-  EXPECT_EQ(1, absl::apply(std::move(f), std::make_tuple(3, 2)));
-  EXPECT_EQ(1, absl::apply(EphemeralFunctor(), std::make_tuple(3, 2)));
-}
-TEST(ApplyTest, OverloadedFunctor) {
-  OverloadedFunctor f;
-  const OverloadedFunctor& cf = f;
-
-  EXPECT_EQ("&", absl::apply(f, std::tuple<>{}));
-  EXPECT_EQ("& 42", absl::apply(f, std::make_tuple(" 42")));
-
-  EXPECT_EQ("const&", absl::apply(cf, std::tuple<>{}));
-  EXPECT_EQ("const& 42", absl::apply(cf, std::make_tuple(" 42")));
-
-  EXPECT_EQ("&&", absl::apply(std::move(f), std::tuple<>{}));
-  OverloadedFunctor f2;
-  EXPECT_EQ("&& 42", absl::apply(std::move(f2), std::make_tuple(" 42")));
-}
-
-TEST(ApplyTest, ReferenceWrapper) {
-  ConstFunctor cf;
-  MutableFunctor mf;
-  EXPECT_EQ(1, absl::apply(std::cref(cf), std::make_tuple(3, 2)));
-  EXPECT_EQ(1, absl::apply(std::ref(cf), std::make_tuple(3, 2)));
-  EXPECT_EQ(1, absl::apply(std::ref(mf), std::make_tuple(3, 2)));
-}
-
-TEST(ApplyTest, MemberFunction) {
-  std::unique_ptr<Class> p(new Class);
-  std::unique_ptr<const Class> cp(new Class);
-  EXPECT_EQ(
-      1, absl::apply(&Class::Method,
-                     std::tuple<std::unique_ptr<Class>&, int, int>(p, 3, 2)));
-  EXPECT_EQ(1, absl::apply(&Class::Method,
-                           std::tuple<Class*, int, int>(p.get(), 3, 2)));
-  EXPECT_EQ(
-      1, absl::apply(&Class::Method, std::tuple<Class&, int, int>(*p, 3, 2)));
-
-  EXPECT_EQ(
-      1, absl::apply(&Class::ConstMethod,
-                     std::tuple<std::unique_ptr<Class>&, int, int>(p, 3, 2)));
-  EXPECT_EQ(1, absl::apply(&Class::ConstMethod,
-                           std::tuple<Class*, int, int>(p.get(), 3, 2)));
-  EXPECT_EQ(1, absl::apply(&Class::ConstMethod,
-                           std::tuple<Class&, int, int>(*p, 3, 2)));
-
-  EXPECT_EQ(1, absl::apply(&Class::ConstMethod,
-                           std::tuple<std::unique_ptr<const Class>&, int, int>(
-                               cp, 3, 2)));
-  EXPECT_EQ(1, absl::apply(&Class::ConstMethod,
-                           std::tuple<const Class*, int, int>(cp.get(), 3, 2)));
-  EXPECT_EQ(1, absl::apply(&Class::ConstMethod,
-                           std::tuple<const Class&, int, int>(*cp, 3, 2)));
-
-  EXPECT_EQ(1, absl::apply(&Class::Method,
-                           std::make_tuple(absl::make_unique<Class>(), 3, 2)));
-  EXPECT_EQ(1, absl::apply(&Class::ConstMethod,
-                           std::make_tuple(absl::make_unique<Class>(), 3, 2)));
-  EXPECT_EQ(
-      1, absl::apply(&Class::ConstMethod,
-                     std::make_tuple(absl::make_unique<const Class>(), 3, 2)));
-}
-
-TEST(ApplyTest, DataMember) {
-  std::unique_ptr<Class> p(new Class{42});
-  std::unique_ptr<const Class> cp(new Class{42});
-  EXPECT_EQ(
-      42, absl::apply(&Class::member, std::tuple<std::unique_ptr<Class>&>(p)));
-  EXPECT_EQ(42, absl::apply(&Class::member, std::tuple<Class&>(*p)));
-  EXPECT_EQ(42, absl::apply(&Class::member, std::tuple<Class*>(p.get())));
-
-  absl::apply(&Class::member, std::tuple<std::unique_ptr<Class>&>(p)) = 42;
-  absl::apply(&Class::member, std::tuple<Class*>(p.get())) = 42;
-  absl::apply(&Class::member, std::tuple<Class&>(*p)) = 42;
-
-  EXPECT_EQ(42, absl::apply(&Class::member,
-                            std::tuple<std::unique_ptr<const Class>&>(cp)));
-  EXPECT_EQ(42, absl::apply(&Class::member, std::tuple<const Class&>(*cp)));
-  EXPECT_EQ(42,
-            absl::apply(&Class::member, std::tuple<const Class*>(cp.get())));
-}
-
-TEST(ApplyTest, FlipFlop) {
-  FlipFlop obj = {42};
-  // This call could resolve to (obj.*&FlipFlop::ConstMethod)() or
-  // ((*obj).*&FlipFlop::ConstMethod)(). We verify that it's the former.
-  EXPECT_EQ(42, absl::apply(&FlipFlop::ConstMethod, std::make_tuple(obj)));
-  EXPECT_EQ(42, absl::apply(&FlipFlop::member, std::make_tuple(obj)));
-}
-
-TEST(ExchangeTest, MoveOnly) {
-  auto a = Factory(1);
-  EXPECT_EQ(1, *a);
-  auto b = absl::exchange(a, Factory(2));
-  EXPECT_EQ(2, *a);
-  EXPECT_EQ(1, *b);
-}
-
-TEST(MakeFromTupleTest, String) {
-  EXPECT_EQ(
-      absl::make_from_tuple<std::string>(std::make_tuple("hello world", 5)),
-      "hello");
-}
-
-TEST(MakeFromTupleTest, MoveOnlyParameter) {
-  struct S {
-    S(std::unique_ptr<int> n, std::unique_ptr<int> m) : value(*n + *m) {}
-    int value = 0;
-  };
-  auto tup =
-      std::make_tuple(absl::make_unique<int>(3), absl::make_unique<int>(4));
-  auto s = absl::make_from_tuple<S>(std::move(tup));
-  EXPECT_EQ(s.value, 7);
-}
-
-TEST(MakeFromTupleTest, NoParameters) {
-  struct S {
-    S() : value(1) {}
-    int value = 2;
-  };
-  EXPECT_EQ(absl::make_from_tuple<S>(std::make_tuple()).value, 1);
-}
-
-TEST(MakeFromTupleTest, Pair) {
-  EXPECT_EQ(
-      (absl::make_from_tuple<std::pair<bool, int>>(std::make_tuple(true, 17))),
-      std::make_pair(true, 17));
-}
-
-}  // namespace
-
diff --git a/third_party/abseil/ci/absl_alternate_options.h b/third_party/abseil/ci/absl_alternate_options.h
deleted file mode 100644
index 29b020d..0000000
--- a/third_party/abseil/ci/absl_alternate_options.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2019 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Alternate options.h file, used in continuous integration testing to exercise
-// option settings not used by default.
-
-#ifndef ABSL_BASE_OPTIONS_H_
-#define ABSL_BASE_OPTIONS_H_
-
-#define ABSL_OPTION_USE_STD_ANY 0
-#define ABSL_OPTION_USE_STD_OPTIONAL 0
-#define ABSL_OPTION_USE_STD_STRING_VIEW 0
-#define ABSL_OPTION_USE_STD_VARIANT 0
-#define ABSL_OPTION_USE_INLINE_NAMESPACE 1
-#define ABSL_OPTION_INLINE_NAMESPACE_NAME ns
-#define ABSL_OPTION_HARDENED 1
-
-#endif  // ABSL_BASE_OPTIONS_H_
diff --git a/third_party/abseil/ci/cmake_common.sh b/third_party/abseil/ci/cmake_common.sh
deleted file mode 100644
index aec8a11..0000000
--- a/third_party/abseil/ci/cmake_common.sh
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright 2020 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# The commit of GoogleTest to be used in the CMake tests in this directory.
-# Keep this in sync with the commit in the WORKSPACE file.
-readonly ABSL_GOOGLETEST_COMMIT="8567b09290fe402cf01923e2131c5635b8ed851b"
-
-# Avoid depending on GitHub by looking for a cached copy of the commit first.
-if [[ -r "${KOKORO_GFILE_DIR:-}/distdir/${ABSL_GOOGLETEST_COMMIT}.zip" ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
-  ABSL_GOOGLETEST_DOWNLOAD_URL="file:///distdir/${ABSL_GOOGLETEST_COMMIT}.zip"
-else
-  ABSL_GOOGLETEST_DOWNLOAD_URL="https://github.com/google/googletest/archive/${ABSL_GOOGLETEST_COMMIT}.zip"
-fi
diff --git a/third_party/abseil/ci/cmake_install_test.sh b/third_party/abseil/ci/cmake_install_test.sh
deleted file mode 100755
index 5bf540c..0000000
--- a/third_party/abseil/ci/cmake_install_test.sh
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-source "${ABSEIL_ROOT}/ci/cmake_common.sh"
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_GCC_LATEST_CONTAINER}
-
-time docker run \
-    --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp,readonly \
-    --workdir=/abseil-cpp \
-    --tmpfs=/buildfs:exec \
-    --cap-add=SYS_PTRACE \
-    --rm \
-    -e CFLAGS="-Werror" \
-    -e CXXFLAGS="-Werror" \
-    ${DOCKER_CONTAINER} \
-    /bin/bash CMake/install_test_project/test.sh $@
diff --git a/third_party/abseil/ci/linux_clang-latest_libcxx_asan_bazel.sh b/third_party/abseil/ci/linux_clang-latest_libcxx_asan_bazel.sh
deleted file mode 100755
index ffbb832..0000000
--- a/third_party/abseil/ci/linux_clang-latest_libcxx_asan_bazel.sh
+++ /dev/null
@@ -1,99 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script that can be invoked to test abseil-cpp in a hermetic environment
-# using a Docker image on Linux. You must have Docker installed to use this
-# script.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
-fi
-
-if [[ -z ${COMPILATION_MODE:-} ]]; then
-  COMPILATION_MODE="fastbuild opt"
-fi
-
-if [[ -z ${EXCEPTIONS_MODE:-} ]]; then
-  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_CLANG_LATEST_CONTAINER}
-
-# USE_BAZEL_CACHE=1 only works on Kokoro.
-# Without access to the credentials this won't work.
-if [[ ${USE_BAZEL_CACHE:-0} -ne 0 ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_KEYSTORE_DIR},target=/keystore,readonly ${DOCKER_EXTRA_ARGS:-}"
-  # Bazel doesn't track changes to tools outside of the workspace
-  # (e.g. /usr/bin/gcc), so by appending the docker container to the
-  # remote_http_cache url, we make changes to the container part of
-  # the cache key. Hashing the key is to make it shorter and url-safe.
-  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
-  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
-  BAZEL_EXTRA_ARGS="--distdir=/distdir ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-for std in ${STD}; do
-  for compilation_mode in ${COMPILATION_MODE}; do
-    for exceptions_mode in ${EXCEPTIONS_MODE}; do
-      echo "--------------------------------------------------------------------"
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp,readonly \
-        --workdir=/abseil-cpp \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CC="/opt/llvm/clang/bin/clang" \
-        -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
-        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib" \
-        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/c++/v1" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        ${DOCKER_CONTAINER} \
-        /usr/local/bin/bazel test ... \
-          --compilation_mode="${compilation_mode}" \
-          --copt="${exceptions_mode}" \
-          --copt="-fsanitize=address" \
-          --copt="-fsanitize=float-divide-by-zero" \
-          --copt="-fsanitize=nullability" \
-          --copt="-fsanitize=undefined" \
-          --copt="-fno-sanitize-blacklist" \
-          --copt=-Werror \
-          --keep_going \
-          --linkopt="-fsanitize=address" \
-          --linkopt="-fsanitize-link-c++-runtime" \
-          --show_timestamps \
-          --test_env="ASAN_SYMBOLIZER_PATH=/opt/llvm/clang/bin/llvm-symbolizer" \
-          --test_env="TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo" \
-          --test_env="UBSAN_OPTIONS=print_stacktrace=1" \
-          --test_env="UBSAN_SYMBOLIZER_PATH=/opt/llvm/clang/bin/llvm-symbolizer" \
-          --test_output=errors \
-          --test_tag_filters="-benchmark,-noasan" \
-          ${BAZEL_EXTRA_ARGS:-}
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_clang-latest_libcxx_bazel.sh b/third_party/abseil/ci/linux_clang-latest_libcxx_bazel.sh
deleted file mode 100755
index f6a2221..0000000
--- a/third_party/abseil/ci/linux_clang-latest_libcxx_bazel.sh
+++ /dev/null
@@ -1,97 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script that can be invoked to test abseil-cpp in a hermetic environment
-# using a Docker image on Linux. You must have Docker installed to use this
-# script.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
-fi
-
-if [[ -z ${COMPILATION_MODE:-} ]]; then
-  COMPILATION_MODE="fastbuild opt"
-fi
-
-if [[ -z ${EXCEPTIONS_MODE:-} ]]; then
-  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_CLANG_LATEST_CONTAINER}
-
-# USE_BAZEL_CACHE=1 only works on Kokoro.
-# Without access to the credentials this won't work.
-if [[ ${USE_BAZEL_CACHE:-0} -ne 0 ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_KEYSTORE_DIR},target=/keystore,readonly ${DOCKER_EXTRA_ARGS:-}"
-  # Bazel doesn't track changes to tools outside of the workspace
-  # (e.g. /usr/bin/gcc), so by appending the docker container to the
-  # remote_http_cache url, we make changes to the container part of
-  # the cache key. Hashing the key is to make it shorter and url-safe.
-  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
-  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
-  BAZEL_EXTRA_ARGS="--distdir=/distdir ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-for std in ${STD}; do
-  for compilation_mode in ${COMPILATION_MODE}; do
-    for exceptions_mode in ${EXCEPTIONS_MODE}; do
-      echo "--------------------------------------------------------------------"
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp-ro,readonly \
-        --tmpfs=/abseil-cpp \
-        --workdir=/abseil-cpp \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CC="/opt/llvm/clang/bin/clang" \
-        -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
-        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib" \
-        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/c++/v1" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        ${DOCKER_CONTAINER} \
-        /bin/sh -c "
-          cp -r /abseil-cpp-ro/* /abseil-cpp/
-          if [ -n \"${ALTERNATE_OPTIONS:-}\" ]; then
-            cp ${ALTERNATE_OPTIONS:-} absl/base/options.h || exit 1
-          fi
-          /usr/local/bin/bazel test ... \
-            --compilation_mode=\"${compilation_mode}\" \
-            --copt=\"${exceptions_mode}\" \
-            --copt=-Werror \
-            --define=\"absl=1\" \
-            --keep_going \
-            --show_timestamps \
-            --test_env=\"GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1\" \
-            --test_env=\"TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo\" \
-            --test_output=errors \
-            --test_tag_filters=-benchmark \
-            ${BAZEL_EXTRA_ARGS:-}"
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_clang-latest_libcxx_tsan_bazel.sh b/third_party/abseil/ci/linux_clang-latest_libcxx_tsan_bazel.sh
deleted file mode 100755
index e70e821..0000000
--- a/third_party/abseil/ci/linux_clang-latest_libcxx_tsan_bazel.sh
+++ /dev/null
@@ -1,95 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script that can be invoked to test abseil-cpp in a hermetic environment
-# using a Docker image on Linux. You must have Docker installed to use this
-# script.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
-fi
-
-if [[ -z ${COMPILATION_MODE:-} ]]; then
-  COMPILATION_MODE="fastbuild opt"
-fi
-
-if [[ -z ${EXCEPTIONS_MODE:-} ]]; then
-  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_CLANG_LATEST_CONTAINER}
-
-# USE_BAZEL_CACHE=1 only works on Kokoro.
-# Without access to the credentials this won't work.
-if [[ ${USE_BAZEL_CACHE:-0} -ne 0 ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_KEYSTORE_DIR},target=/keystore,readonly ${DOCKER_EXTRA_ARGS:-}"
-  # Bazel doesn't track changes to tools outside of the workspace
-  # (e.g. /usr/bin/gcc), so by appending the docker container to the
-  # remote_http_cache url, we make changes to the container part of
-  # the cache key. Hashing the key is to make it shorter and url-safe.
-  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
-  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
-  BAZEL_EXTRA_ARGS="--distdir=/distdir ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-for std in ${STD}; do
-  for compilation_mode in ${COMPILATION_MODE}; do
-    for exceptions_mode in ${EXCEPTIONS_MODE}; do
-      echo "--------------------------------------------------------------------"
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp,readonly \
-        --workdir=/abseil-cpp \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CC="/opt/llvm/clang/bin/clang" \
-        -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
-        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx-tsan/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx-tsan/lib" \
-        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx-tsan/include/c++/v1" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        ${DOCKER_CONTAINER} \
-        /usr/local/bin/bazel test ... \
-          --build_tag_filters="-notsan" \
-          --compilation_mode="${compilation_mode}" \
-          --copt="${exceptions_mode}" \
-          --copt="-fsanitize=thread" \
-          --copt="-fno-sanitize-blacklist" \
-          --copt=-Werror \
-          --keep_going \
-          --linkopt="-fsanitize=thread" \
-          --show_timestamps \
-          --test_env="TSAN_OPTIONS=report_atomic_races=0" \
-          --test_env="TSAN_SYMBOLIZER_PATH=/opt/llvm/clang/bin/llvm-symbolizer" \
-          --test_env="TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo" \
-          --test_output=errors \
-          --test_tag_filters="-benchmark,-notsan" \
-          ${BAZEL_EXTRA_ARGS:-}
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_clang-latest_libstdcxx_bazel.sh b/third_party/abseil/ci/linux_clang-latest_libstdcxx_bazel.sh
deleted file mode 100755
index 0986ff4..0000000
--- a/third_party/abseil/ci/linux_clang-latest_libstdcxx_bazel.sh
+++ /dev/null
@@ -1,91 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script that can be invoked to test abseil-cpp in a hermetic environment
-# using a Docker image on Linux. You must have Docker installed to use this
-# script.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
-fi
-
-if [[ -z ${COMPILATION_MODE:-} ]]; then
-  COMPILATION_MODE="fastbuild opt"
-fi
-
-if [[ -z ${EXCEPTIONS_MODE:-} ]]; then
-  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_CLANG_LATEST_CONTAINER}
-
-# USE_BAZEL_CACHE=1 only works on Kokoro.
-# Without access to the credentials this won't work.
-if [[ ${USE_BAZEL_CACHE:-0} -ne 0 ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_KEYSTORE_DIR},target=/keystore,readonly ${DOCKER_EXTRA_ARGS:-}"
-  # Bazel doesn't track changes to tools outside of the workspace
-  # (e.g. /usr/bin/gcc), so by appending the docker container to the
-  # remote_http_cache url, we make changes to the container part of
-  # the cache key. Hashing the key is to make it shorter and url-safe.
-  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
-  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
-  BAZEL_EXTRA_ARGS="--distdir=/distdir ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-for std in ${STD}; do
-  for compilation_mode in ${COMPILATION_MODE}; do
-    for exceptions_mode in ${EXCEPTIONS_MODE}; do
-      echo "--------------------------------------------------------------------"
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp,readonly \
-        --workdir=/abseil-cpp \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CC="/opt/llvm/clang/bin/clang" \
-        -e BAZEL_CXXOPTS="-std=${std}" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        ${DOCKER_CONTAINER} \
-        /usr/local/bin/bazel test ... \
-          --compilation_mode="${compilation_mode}" \
-          --copt="--gcc-toolchain=/usr/local" \
-          --copt="${exceptions_mode}" \
-          --copt=-Werror \
-          --define="absl=1" \
-          --keep_going \
-          --linkopt="--gcc-toolchain=/usr/local" \
-          --show_timestamps \
-          --test_env="GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1" \
-          --test_env="TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo" \
-          --test_output=errors \
-          --test_tag_filters=-benchmark \
-          ${BAZEL_EXTRA_ARGS:-}
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_docker_containers.sh b/third_party/abseil/ci/linux_docker_containers.sh
deleted file mode 100644
index 1c29d9a..0000000
--- a/third_party/abseil/ci/linux_docker_containers.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# The file contains Docker container identifiers currently used by test scripts.
-# Test scripts should source this file to get the identifiers.
-
-readonly LINUX_ALPINE_CONTAINER="gcr.io/google.com/absl-177019/alpine:20201026"
-readonly LINUX_CLANG_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20201008"
-readonly LINUX_GCC_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20201008"
-readonly LINUX_GCC_FLOOR_CONTAINER="gcr.io/google.com/absl-177019/linux_gcc-floor:20201015"
diff --git a/third_party/abseil/ci/linux_gcc-floor_libstdcxx_bazel.sh b/third_party/abseil/ci/linux_gcc-floor_libstdcxx_bazel.sh
deleted file mode 100755
index 224aef8..0000000
--- a/third_party/abseil/ci/linux_gcc-floor_libstdcxx_bazel.sh
+++ /dev/null
@@ -1,89 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2020 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script that can be invoked to test abseil-cpp in a hermetic environment
-# using a Docker image on Linux. You must have Docker installed to use this
-# script.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14"
-fi
-
-if [[ -z ${COMPILATION_MODE:-} ]]; then
-  COMPILATION_MODE="fastbuild opt"
-fi
-
-if [[ -z ${EXCEPTIONS_MODE:-} ]]; then
-  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_GCC_FLOOR_CONTAINER}
-
-# USE_BAZEL_CACHE=1 only works on Kokoro.
-# Without access to the credentials this won't work.
-if [[ ${USE_BAZEL_CACHE:-0} -ne 0 ]]; then
-  DOCKER_EXTRA_ARGS="--volume=${KOKORO_KEYSTORE_DIR}:/keystore:ro ${DOCKER_EXTRA_ARGS:-}"
-  # Bazel doesn't track changes to tools outside of the workspace
-  # (e.g. /usr/bin/gcc), so by appending the docker container to the
-  # remote_http_cache url, we make changes to the container part of
-  # the cache key. Hashing the key is to make it shorter and url-safe.
-  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
-  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  DOCKER_EXTRA_ARGS="--volume=${KOKORO_GFILE_DIR}/distdir:/distdir:ro ${DOCKER_EXTRA_ARGS:-}"
-  BAZEL_EXTRA_ARGS="--distdir=/distdir ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-for std in ${STD}; do
-  for compilation_mode in ${COMPILATION_MODE}; do
-    for exceptions_mode in ${EXCEPTIONS_MODE}; do
-      echo "--------------------------------------------------------------------"
-      time docker run \
-        --volume="${ABSEIL_ROOT}:/abseil-cpp:ro" \
-        --workdir=/abseil-cpp \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CC="/usr/local/bin/gcc" \
-        -e BAZEL_CXXOPTS="-std=${std}" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        ${DOCKER_CONTAINER} \
-        /usr/local/bin/bazel test ... \
-          --compilation_mode="${compilation_mode}" \
-          --copt="${exceptions_mode}" \
-          --copt=-Werror \
-          --define="absl=1" \
-          --keep_going \
-          --show_timestamps \
-          --test_env="GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1" \
-          --test_env="TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo" \
-          --test_output=errors \
-          --test_tag_filters=-benchmark \
-          ${BAZEL_EXTRA_ARGS:-}
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_gcc-latest_libstdcxx_bazel.sh b/third_party/abseil/ci/linux_gcc-latest_libstdcxx_bazel.sh
deleted file mode 100755
index 37d89d9..0000000
--- a/third_party/abseil/ci/linux_gcc-latest_libstdcxx_bazel.sh
+++ /dev/null
@@ -1,95 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script that can be invoked to test abseil-cpp in a hermetic environment
-# using a Docker image on Linux. You must have Docker installed to use this
-# script.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
-fi
-
-if [[ -z ${COMPILATION_MODE:-} ]]; then
-  COMPILATION_MODE="fastbuild opt"
-fi
-
-if [[ -z ${EXCEPTIONS_MODE:-} ]]; then
-  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_GCC_LATEST_CONTAINER}
-
-# USE_BAZEL_CACHE=1 only works on Kokoro.
-# Without access to the credentials this won't work.
-if [[ ${USE_BAZEL_CACHE:-0} -ne 0 ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_KEYSTORE_DIR},target=/keystore,readonly ${DOCKER_EXTRA_ARGS:-}"
-  # Bazel doesn't track changes to tools outside of the workspace
-  # (e.g. /usr/bin/gcc), so by appending the docker container to the
-  # remote_http_cache url, we make changes to the container part of
-  # the cache key. Hashing the key is to make it shorter and url-safe.
-  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
-  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
-  BAZEL_EXTRA_ARGS="--distdir=/distdir ${BAZEL_EXTRA_ARGS:-}"
-fi
-
-for std in ${STD}; do
-  for compilation_mode in ${COMPILATION_MODE}; do
-    for exceptions_mode in ${EXCEPTIONS_MODE}; do
-      echo "--------------------------------------------------------------------"
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp-ro,readonly \
-        --tmpfs=/abseil-cpp \
-        --workdir=/abseil-cpp \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CC="/usr/local/bin/gcc" \
-        -e BAZEL_CXXOPTS="-std=${std}" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        ${DOCKER_CONTAINER} \
-        /bin/sh -c "
-          cp -r /abseil-cpp-ro/* /abseil-cpp/
-          if [ -n \"${ALTERNATE_OPTIONS:-}\" ]; then
-            cp ${ALTERNATE_OPTIONS:-} absl/base/options.h || exit 1
-          fi
-          /usr/local/bin/bazel test ... \
-            --compilation_mode=\"${compilation_mode}\" \
-            --copt=\"${exceptions_mode}\" \
-            --copt=-Werror \
-            --define=\"absl=1\" \
-            --keep_going \
-            --show_timestamps \
-            --test_env=\"GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1\" \
-            --test_env=\"TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo\" \
-            --test_output=errors \
-            --test_tag_filters=-benchmark \
-            ${BAZEL_EXTRA_ARGS:-}"
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_gcc-latest_libstdcxx_cmake.sh b/third_party/abseil/ci/linux_gcc-latest_libstdcxx_cmake.sh
deleted file mode 100755
index ed9cfa3..0000000
--- a/third_party/abseil/ci/linux_gcc-latest_libstdcxx_cmake.sh
+++ /dev/null
@@ -1,65 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-source "${ABSEIL_ROOT}/ci/cmake_common.sh"
-
-if [[ -z ${ABSL_CMAKE_CXX_STANDARDS:-} ]]; then
-  ABSL_CMAKE_CXX_STANDARDS="11 14 17 20"
-fi
-
-if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
-  ABSL_CMAKE_BUILD_TYPES="Debug Release"
-fi
-
-if [[ -z ${ABSL_CMAKE_BUILD_SHARED:-} ]]; then
-  ABSL_CMAKE_BUILD_SHARED="OFF ON"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_GCC_LATEST_CONTAINER}
-
-for std in ${ABSL_CMAKE_CXX_STANDARDS}; do
-  for compilation_mode in ${ABSL_CMAKE_BUILD_TYPES}; do
-    for build_shared in ${ABSL_CMAKE_BUILD_SHARED}; do
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp,readonly \
-        --tmpfs=/buildfs:exec \
-        --workdir=/buildfs \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CFLAGS="-Werror" \
-        -e CXXFLAGS="-Werror" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        "${DOCKER_CONTAINER}" \
-        /bin/bash -c "
-          cmake /abseil-cpp \
-            -DABSL_GOOGLETEST_DOWNLOAD_URL=${ABSL_GOOGLETEST_DOWNLOAD_URL} \
-            -DABSL_RUN_TESTS=ON \
-            -DBUILD_SHARED_LIBS=${build_shared} \
-            -DCMAKE_BUILD_TYPE=${compilation_mode} \
-            -DCMAKE_CXX_STANDARD=${std} \
-            -DCMAKE_MODULE_LINKER_FLAGS=\"-Wl,--no-undefined\" && \
-          make -j$(nproc) && \
-          ctest -j$(nproc) --output-on-failure"
-    done
-  done
-done
diff --git a/third_party/abseil/ci/linux_gcc_alpine_cmake.sh b/third_party/abseil/ci/linux_gcc_alpine_cmake.sh
deleted file mode 100755
index 31310ac..0000000
--- a/third_party/abseil/ci/linux_gcc_alpine_cmake.sh
+++ /dev/null
@@ -1,64 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-source "${ABSEIL_ROOT}/ci/cmake_common.sh"
-
-if [[ -z ${ABSL_CMAKE_CXX_STANDARDS:-} ]]; then
-  ABSL_CMAKE_CXX_STANDARDS="11 14 17"
-fi
-
-if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
-  ABSL_CMAKE_BUILD_TYPES="Debug Release"
-fi
-
-if [[ -z ${ABSL_CMAKE_BUILD_SHARED:-} ]]; then
-  ABSL_CMAKE_BUILD_SHARED="OFF ON"
-fi
-
-source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
-readonly DOCKER_CONTAINER=${LINUX_ALPINE_CONTAINER}
-
-for std in ${ABSL_CMAKE_CXX_STANDARDS}; do
-  for compilation_mode in ${ABSL_CMAKE_BUILD_TYPES}; do
-    for build_shared in ${ABSL_CMAKE_BUILD_SHARED}; do
-      time docker run \
-        --mount type=bind,source="${ABSEIL_ROOT}",target=/abseil-cpp,readonly \
-        --tmpfs=/buildfs:exec \
-        --workdir=/buildfs \
-        --cap-add=SYS_PTRACE \
-        --rm \
-        -e CFLAGS="-Werror" \
-        -e CXXFLAGS="-Werror" \
-        ${DOCKER_EXTRA_ARGS:-} \
-        "${DOCKER_CONTAINER}" \
-        /bin/sh -c "
-          cmake /abseil-cpp \
-            -DABSL_GOOGLETEST_DOWNLOAD_URL=${ABSL_GOOGLETEST_DOWNLOAD_URL} \
-            -DABSL_RUN_TESTS=ON \
-            -DCMAKE_BUILD_TYPE=${compilation_mode} \
-            -DCMAKE_CXX_STANDARD=${std} \
-            -DCMAKE_MODULE_LINKER_FLAGS=\"-Wl,--no-undefined\" && \
-          make -j$(nproc) && \
-          ctest -j$(nproc) --output-on-failure"
-    done
-  done
-done
diff --git a/third_party/abseil/ci/macos_xcode_bazel.sh b/third_party/abseil/ci/macos_xcode_bazel.sh
deleted file mode 100755
index 738adf9..0000000
--- a/third_party/abseil/ci/macos_xcode_bazel.sh
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script is invoked on Kokoro to test Abseil on macOS.
-# It is not hermetic and may break when Kokoro is updated.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-# If we are running on Kokoro, check for a versioned Bazel binary.
-KOKORO_GFILE_BAZEL_BIN="bazel-2.0.0-darwin-x86_64"
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f ${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN} ]]; then
-  BAZEL_BIN="${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN}"
-  chmod +x ${BAZEL_BIN}
-else
-  BAZEL_BIN="bazel"
-fi
-
-# Print the compiler and Bazel versions.
-echo "---------------"
-gcc -v
-echo "---------------"
-${BAZEL_BIN} version
-echo "---------------"
-
-cd ${ABSEIL_ROOT}
-
-if [[ -n "${ALTERNATE_OPTIONS:-}" ]]; then
-  cp ${ALTERNATE_OPTIONS:-} absl/base/options.h || exit 1
-fi
-
-${BAZEL_BIN} test ... \
-  --copt=-Werror \
-  --keep_going \
-  --show_timestamps \
-  --test_env="TZDIR=${ABSEIL_ROOT}/absl/time/internal/cctz/testdata/zoneinfo" \
-  --test_output=errors \
-  --test_tag_filters=-benchmark
diff --git a/third_party/abseil/ci/macos_xcode_cmake.sh b/third_party/abseil/ci/macos_xcode_cmake.sh
deleted file mode 100755
index 0847b3e..0000000
--- a/third_party/abseil/ci/macos_xcode_cmake.sh
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2019 The Abseil Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -euox pipefail
-
-if [[ -z ${ABSEIL_ROOT:-} ]]; then
-  ABSEIL_ROOT="$(dirname ${0})/.."
-fi
-ABSEIL_ROOT=$(realpath ${ABSEIL_ROOT})
-
-source "${ABSEIL_ROOT}/ci/cmake_common.sh"
-
-# The MacOS build doesn't run in a docker container, so we have to override ABSL_GOOGLETEST_DOWNLOAD_URL.
-if [[ -r "${KOKORO_GFILE_DIR}/distdir/${ABSL_GOOGLETEST_COMMIT}.zip" ]]; then
-  ABSL_GOOGLETEST_DOWNLOAD_URL="file://${KOKORO_GFILE_DIR}/distdir/${ABSL_GOOGLETEST_COMMIT}.zip"
-fi
-
-if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
-  ABSL_CMAKE_BUILD_TYPES="Debug"
-fi
-
-if [[ -z ${ABSL_CMAKE_BUILD_SHARED:-} ]]; then
-  ABSL_CMAKE_BUILD_SHARED="OFF ON"
-fi
-
-for compilation_mode in ${ABSL_CMAKE_BUILD_TYPES}; do
-  for build_shared in ${ABSL_CMAKE_BUILD_SHARED}; do
-    BUILD_DIR=$(mktemp -d ${compilation_mode}.XXXXXXXX)
-    cd ${BUILD_DIR}
-
-    # TODO(absl-team): Enable -Werror once all warnings are fixed.
-    time cmake ${ABSEIL_ROOT} \
-      -GXcode \
-      -DBUILD_SHARED_LIBS=${build_shared} \
-      -DCMAKE_BUILD_TYPE=${compilation_mode} \
-      -DCMAKE_CXX_STANDARD=11 \
-      -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--no-undefined" \
-      -DABSL_GOOGLETEST_DOWNLOAD_URL="${ABSL_GOOGLETEST_DOWNLOAD_URL}" \
-      -DABSL_RUN_TESTS=ON
-    time cmake --build .
-    time ctest -C ${compilation_mode} --output-on-failure
-  done
-done
diff --git a/third_party/abseil/conanfile.py b/third_party/abseil/conanfile.py
deleted file mode 100755
index 926ec5c..0000000
--- a/third_party/abseil/conanfile.py
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-# Note: Conan is supported on a best-effort basis. Abseil doesn't use Conan
-# internally, so we won't know if it stops working. We may ask community
-# members to help us debug any problems that arise.
-
-from conans import ConanFile, CMake, tools
-from conans.errors import ConanInvalidConfiguration
-from conans.model.version import Version
-
-
-class AbseilConan(ConanFile):
-    name = "abseil"
-    url = "https://github.com/abseil/abseil-cpp"
-    homepage = url
-    author = "Abseil <abseil-io@googlegroups.com>"
-    description = "Abseil Common Libraries (C++) from Google"
-    license = "Apache-2.0"
-    topics = ("conan", "abseil", "abseil-cpp", "google", "common-libraries")
-    exports = ["LICENSE"]
-    exports_sources = ["CMakeLists.txt", "CMake/*", "absl/*"]
-    generators = "cmake"
-    settings = "os", "arch", "compiler", "build_type"
-
-    def configure(self):
-        if self.settings.os == "Windows" and \
-           self.settings.compiler == "Visual Studio" and \
-           Version(self.settings.compiler.version.value) < "14":
-            raise ConanInvalidConfiguration("Abseil does not support MSVC < 14")
-
-    def build(self):
-        tools.replace_in_file("CMakeLists.txt", "project(absl CXX)", "project(absl CXX)\ninclude(conanbuildinfo.cmake)\nconan_basic_setup()")
-        cmake = CMake(self)
-        cmake.definitions["BUILD_TESTING"] = False
-        cmake.configure()
-        cmake.build()
-
-    def package(self):
-        self.copy("LICENSE", dst="licenses")
-        self.copy("*.h", dst="include", src=".")
-        self.copy("*.inc", dst="include", src=".")
-        self.copy("*.a", dst="lib", src=".", keep_path=False)
-        self.copy("*.lib", dst="lib", src=".", keep_path=False)
-
-    def package_info(self):
-        if self.settings.os == "Linux":
-            self.cpp_info.libs = ["-Wl,--start-group"]
-        self.cpp_info.libs.extend(tools.collect_libs(self))
-        if self.settings.os == "Linux":
-            self.cpp_info.libs.extend(["-Wl,--end-group", "pthread"])
diff --git a/third_party/google-benchmark/AUTHORS b/third_party/google-benchmark/AUTHORS
deleted file mode 100644
index ef3051a..0000000
--- a/third_party/google-benchmark/AUTHORS
+++ /dev/null
@@ -1,49 +0,0 @@
-# This is the official list of benchmark authors for copyright purposes.
-# This file is distinct from the CONTRIBUTORS files.
-# See the latter for an explanation.
-#
-# Names should be added to this file as:
-#	Name or Organization <email address>
-# The email address is not required for organizations.
-#
-# Please keep the list sorted.
-
-Albert Pretorius <pretoalb@gmail.com>
-Andriy Berestovskyy <berestovskyy@gmail.com>
-Arne Beer <arne@twobeer.de>
-Carto
-Christopher Seymour <chris.j.seymour@hotmail.com>
-David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
-Deniz Evrenci <denizevrenci@gmail.com>
-Dirac Research 
-Dominik Czarnota <dominik.b.czarnota@gmail.com>
-Eric Fiselier <eric@efcs.ca>
-Eugene Zhuk <eugene.zhuk@gmail.com>
-Evgeny Safronov <division494@gmail.com>
-Federico Ficarelli <federico.ficarelli@gmail.com>
-Felix Homann <linuxaudio@showlabor.de>
-Google Inc.
-International Business Machines Corporation
-Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
-Jern-Kuan Leong <jernkuan@gmail.com>
-JianXiong Zhou <zhoujianxiong2@gmail.com>
-Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
-Jussi Knuuttila <jussi.knuuttila@gmail.com>
-Kaito Udagawa <umireon@gmail.com>
-Kishan Kumar <kumar.kishan@outlook.com>
-Lei Xu <eddyxu@gmail.com>
-Matt Clarkson <mattyclarkson@gmail.com>
-Maxim Vafin <maxvafin@gmail.com>
-MongoDB Inc.
-Nick Hutchinson <nshutchinson@gmail.com>
-Oleksandr Sochka <sasha.sochka@gmail.com>
-Ori Livneh <ori.livneh@gmail.com>
-Paul Redmond <paul.redmond@gmail.com>
-Radoslav Yovchev <radoslav.tm@gmail.com>
-Roman Lebedev <lebedev.ri@gmail.com>
-Shuo Chen <chenshuo@chenshuo.com>
-Steinar H. Gunderson <sgunderson@bigfoot.com>
-Stripe, Inc.
-Yixuan Qiu <yixuanq@gmail.com>
-Yusuke Suzuki <utatane.tea@gmail.com>
-Zbigniew Skowron <zbychs@gmail.com>
diff --git a/third_party/google-benchmark/BUILD.bazel b/third_party/google-benchmark/BUILD.bazel
index 5069c0b..e69de29 100644
--- a/third_party/google-benchmark/BUILD.bazel
+++ b/third_party/google-benchmark/BUILD.bazel
@@ -1,47 +0,0 @@
-licenses(["notice"])
-
-config_setting(
-    name = "windows",
-    values = {
-        "cpu": "x64_windows",
-    },
-    visibility = [":__subpackages__"],
-)
-
-cc_library(
-    name = "benchmark",
-    srcs = glob(
-        [
-            "src/*.cc",
-            "src/*.h",
-        ],
-        exclude = ["src/benchmark_main.cc"],
-    ),
-    hdrs = ["include/benchmark/benchmark.h"],
-    copts = [
-        "-Wno-format-nonliteral",
-        "-Wno-deprecated-declarations",
-        "-Wno-unused-but-set-variable",
-    ],
-    linkopts = select({
-        ":windows": ["-DEFAULTLIB:shlwapi.lib"],
-        "//conditions:default": [],
-    }),
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-)
-
-cc_library(
-    name = "benchmark_main",
-    srcs = ["src/benchmark_main.cc"],
-    hdrs = ["include/benchmark/benchmark.h"],
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-    deps = [":benchmark"],
-)
-
-cc_library(
-    name = "benchmark_internal_headers",
-    hdrs = glob(["src/*.h"]),
-    visibility = ["//test:__pkg__"],
-)
diff --git a/third_party/google-benchmark/CMakeLists.txt b/third_party/google-benchmark/CMakeLists.txt
deleted file mode 100644
index 76e5fc5..0000000
--- a/third_party/google-benchmark/CMakeLists.txt
+++ /dev/null
@@ -1,268 +0,0 @@
-cmake_minimum_required (VERSION 2.8.12)
-
-foreach(p
-    CMP0048 # OK to clear PROJECT_VERSION on project()
-    CMP0054 # CMake 3.1
-    CMP0056 # export EXE_LINKER_FLAGS to try_run
-    CMP0057 # Support no if() IN_LIST operator
-    )
-  if(POLICY ${p})
-    cmake_policy(SET ${p} NEW)
-  endif()
-endforeach()
-
-project (benchmark)
-
-option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
-option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
-option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
-option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
-if(NOT MSVC)
-  option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
-else()
-  set(BENCHMARK_BUILD_32_BITS OFF CACHE BOOL "Build a 32 bit version of the library - unsupported when using MSVC)" FORCE)
-endif()
-option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
-
-# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
-# may require downloading the source code.
-option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
-
-# This option can be used to disable building and running unit tests which depend on gtest
-# in cases where it is not possible to build or find a valid version of gtest.
-option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" ON)
-
-set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
-function(should_enable_assembly_tests)
-  if(CMAKE_BUILD_TYPE)
-    string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
-    if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
-      # FIXME: The --coverage flag needs to be removed when building assembly
-      # tests for this to work.
-      return()
-    endif()
-  endif()
-  if (MSVC)
-    return()
-  elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
-    return()
-  elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
-    # FIXME: Make these work on 32 bit builds
-    return()
-  elseif(BENCHMARK_BUILD_32_BITS)
-     # FIXME: Make these work on 32 bit builds
-    return()
-  endif()
-  find_program(LLVM_FILECHECK_EXE FileCheck)
-  if (LLVM_FILECHECK_EXE)
-    set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
-    message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
-  else()
-    message(STATUS "Failed to find LLVM FileCheck")
-    return()
-  endif()
-  set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
-endfunction()
-should_enable_assembly_tests()
-
-# This option disables the building and running of the assembly verification tests
-option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
-    ${ENABLE_ASSEMBLY_TESTS_DEFAULT})
-
-# Make sure we can import out CMake functions
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
-
-
-# Read the git tags to determine the project version
-include(GetGitVersion)
-get_git_version(GIT_VERSION)
-
-# Tell the user what versions we are using
-string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION})
-message(STATUS "Version: ${VERSION}")
-
-# The version of the libraries
-set(GENERIC_LIB_VERSION ${VERSION})
-string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
-
-# Import our CMake modules
-include(CheckCXXCompilerFlag)
-include(AddCXXCompilerFlag)
-include(CXXFeatureCheck)
-
-if (BENCHMARK_BUILD_32_BITS)
-  add_required_cxx_compiler_flag(-m32)
-endif()
-
-if (MSVC)
-  # Turn compiler warnings up to 11
-  string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
-  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-
-  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
-    add_cxx_compiler_flag(-EHs-)
-    add_cxx_compiler_flag(-EHa-)
-    add_definitions(-D_HAS_EXCEPTIONS=0)
-  endif()
-  # Link time optimisation
-  if (BENCHMARK_ENABLE_LTO)
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
-    set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
-    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
-    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
-
-    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-
-    set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
-    set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
-    set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
-    set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
-  endif()
-else()
-  # Try and enable C++11. Don't use C++14 because it doesn't work in some
-  # configurations.
-  add_cxx_compiler_flag(-std=c++11)
-  if (NOT HAVE_CXX_FLAG_STD_CXX11)
-    add_cxx_compiler_flag(-std=c++0x)
-  endif()
-
-  # Turn compiler warnings up to 11
-  add_cxx_compiler_flag(-Wall)
-  add_cxx_compiler_flag(-Wextra)
-  add_cxx_compiler_flag(-Wshadow)
-  add_cxx_compiler_flag(-Werror RELEASE)
-  add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
-  add_cxx_compiler_flag(-Werror MINSIZEREL)
-  add_cxx_compiler_flag(-pedantic)
-  add_cxx_compiler_flag(-pedantic-errors)
-  add_cxx_compiler_flag(-Wshorten-64-to-32)
-  add_cxx_compiler_flag(-fstrict-aliasing)
-  # Disable warnings regarding deprecated parts of the library while building
-  # and testing those parts of the library.
-  add_cxx_compiler_flag(-Wno-deprecated-declarations)
-  if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-    # Intel silently ignores '-Wno-deprecated-declarations',
-    # warning no. 1786 must be explicitly disabled.
-    # See #631 for rationale.
-    add_cxx_compiler_flag(-wd1786)
-  endif()
-  # Disable deprecation warnings for release builds (when -Werror is enabled).
-  add_cxx_compiler_flag(-Wno-deprecated RELEASE)
-  add_cxx_compiler_flag(-Wno-deprecated RELWITHDEBINFO)
-  add_cxx_compiler_flag(-Wno-deprecated MINSIZEREL)
-  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
-    add_cxx_compiler_flag(-fno-exceptions)
-  endif()
-
-  if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
-    if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
-      add_cxx_compiler_flag(-Wstrict-aliasing)
-    endif()
-  endif()
-  # ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
-  # (because of deprecated overload)
-  add_cxx_compiler_flag(-wd654)
-  add_cxx_compiler_flag(-Wthread-safety)
-  if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
-    cxx_feature_check(THREAD_SAFETY_ATTRIBUTES)
-  endif()
-
-  # On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
-  # predefined macro, which turns on all of the wonderful libc extensions.
-  # However g++ doesn't do this in Cygwin so we have to define it ourselfs
-  # since we depend on GNU/POSIX/BSD extensions.
-  if (CYGWIN)
-    add_definitions(-D_GNU_SOURCE=1)
-  endif()
-
-  # Link time optimisation
-  if (BENCHMARK_ENABLE_LTO)
-    add_cxx_compiler_flag(-flto)
-    if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
-      find_program(GCC_AR gcc-ar)
-      if (GCC_AR)
-        set(CMAKE_AR ${GCC_AR})
-      endif()
-      find_program(GCC_RANLIB gcc-ranlib)
-      if (GCC_RANLIB)
-        set(CMAKE_RANLIB ${GCC_RANLIB})
-      endif()
-    elseif("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
-      include(llvm-toolchain)
-    endif()
-  endif()
-
-  # Coverage build type
-  set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
-    CACHE STRING "Flags used by the C++ compiler during coverage builds."
-    FORCE)
-  set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
-    CACHE STRING "Flags used for linking binaries during coverage builds."
-    FORCE)
-  set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
-    CACHE STRING "Flags used by the shared libraries linker during coverage builds."
-    FORCE)
-  mark_as_advanced(
-    BENCHMARK_CXX_FLAGS_COVERAGE
-    BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
-    BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
-  set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
-    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
-  add_cxx_compiler_flag(--coverage COVERAGE)
-endif()
-
-if (BENCHMARK_USE_LIBCXX)
-  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    add_cxx_compiler_flag(-stdlib=libc++)
-  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
-          "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
-    add_cxx_compiler_flag(-nostdinc++)
-    message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
-    # Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
-    # configuration checks such as 'find_package(Threads)'
-    list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
-    # -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
-    # linker flags appear before all linker inputs and -lc++ must appear after.
-    list(APPEND BENCHMARK_CXX_LIBRARIES c++)
-  else()
-    message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
-  endif()
-endif(BENCHMARK_USE_LIBCXX)
-
-# C++ feature checks
-# Determine the correct regular expression engine to use
-cxx_feature_check(STD_REGEX)
-cxx_feature_check(GNU_POSIX_REGEX)
-cxx_feature_check(POSIX_REGEX)
-if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
-  message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
-endif()
-if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
-        AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
-  message(WARNING "Using std::regex with exceptions disabled is not fully supported")
-endif()
-cxx_feature_check(STEADY_CLOCK)
-# Ensure we have pthreads
-find_package(Threads REQUIRED)
-
-# Set up directories
-include_directories(${PROJECT_SOURCE_DIR}/include)
-
-# Build the targets
-add_subdirectory(src)
-
-if (BENCHMARK_ENABLE_TESTING)
-  enable_testing()
-  if (BENCHMARK_ENABLE_GTEST_TESTS)
-    include(HandleGTest)
-  endif()
-  add_subdirectory(test)
-endif()
diff --git a/third_party/google-benchmark/CONTRIBUTING.md b/third_party/google-benchmark/CONTRIBUTING.md
deleted file mode 100644
index 43de4c9..0000000
--- a/third_party/google-benchmark/CONTRIBUTING.md
+++ /dev/null
@@ -1,58 +0,0 @@
-# How to contribute #
-
-We'd love to accept your patches and contributions to this project.  There are
-a just a few small guidelines you need to follow.
-
-
-## Contributor License Agreement ##
-
-Contributions to any Google project must be accompanied by a Contributor
-License Agreement.  This is not a copyright **assignment**, it simply gives
-Google permission to use and redistribute your contributions as part of the
-project.
-
-  * If you are an individual writing original source code and you're sure you
-    own the intellectual property, then you'll need to sign an [individual
-    CLA][].
-
-  * If you work for a company that wants to allow you to contribute your work,
-    then you'll need to sign a [corporate CLA][].
-
-You generally only need to submit a CLA once, so if you've already submitted
-one (even if it was for a different project), you probably don't need to do it
-again.
-
-[individual CLA]: https://developers.google.com/open-source/cla/individual
-[corporate CLA]: https://developers.google.com/open-source/cla/corporate
-
-Once your CLA is submitted (or if you already submitted one for
-another Google project), make a commit adding yourself to the
-[AUTHORS][] and [CONTRIBUTORS][] files. This commit can be part
-of your first [pull request][].
-
-[AUTHORS]: AUTHORS
-[CONTRIBUTORS]: CONTRIBUTORS
-
-
-## Submitting a patch ##
-
-  1. It's generally best to start by opening a new issue describing the bug or
-     feature you're intending to fix.  Even if you think it's relatively minor,
-     it's helpful to know what people are working on.  Mention in the initial
-     issue that you are planning to work on that bug or feature so that it can
-     be assigned to you.
-
-  1. Follow the normal process of [forking][] the project, and setup a new
-     branch to work in.  It's important that each group of changes be done in
-     separate branches in order to ensure that a pull request only includes the
-     commits related to that bug or feature.
-
-  1. Do your best to have [well-formed commit messages][] for each change.
-     This provides consistency throughout the project, and ensures that commit
-     messages are able to be formatted properly by various git tools.
-
-  1. Finally, push the commits to your fork and submit a [pull request][].
-
-[forking]: https://help.github.com/articles/fork-a-repo
-[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
-[pull request]: https://help.github.com/articles/creating-a-pull-request
diff --git a/third_party/google-benchmark/CONTRIBUTORS b/third_party/google-benchmark/CONTRIBUTORS
deleted file mode 100644
index d0c31df..0000000
--- a/third_party/google-benchmark/CONTRIBUTORS
+++ /dev/null
@@ -1,69 +0,0 @@
-# People who have agreed to one of the CLAs and can contribute patches.
-# The AUTHORS file lists the copyright holders; this file
-# lists people.  For example, Google employees are listed here
-# but not in AUTHORS, because Google holds the copyright.
-#
-# Names should be added to this file only after verifying that
-# the individual or the individual's organization has agreed to
-# the appropriate Contributor License Agreement, found here:
-#
-# https://developers.google.com/open-source/cla/individual
-# https://developers.google.com/open-source/cla/corporate
-#
-# The agreement for individuals can be filled out on the web.
-#
-# When adding J Random Contributor's name to this file,
-# either J's name or J's organization's name should be
-# added to the AUTHORS file, depending on whether the
-# individual or corporate CLA was used.
-#
-# Names should be added to this file as:
-#     Name <email address>
-#
-# Please keep the list sorted.
-
-Albert Pretorius <pretoalb@gmail.com>
-Andriy Berestovskyy <berestovskyy@gmail.com>
-Arne Beer <arne@twobeer.de>
-Billy Robert O'Neal III <billy.oneal@gmail.com> <bion@microsoft.com>
-Chris Kennelly <ckennelly@google.com> <ckennelly@ckennelly.com>
-Christopher Seymour <chris.j.seymour@hotmail.com>
-Cyrille Faucheux <cyrille.faucheux@gmail.com>
-David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
-Deniz Evrenci <denizevrenci@gmail.com>
-Dominic Hamon <dma@stripysock.com> <dominic@google.com>
-Dominik Czarnota <dominik.b.czarnota@gmail.com>
-Eric Fiselier <eric@efcs.ca>
-Eugene Zhuk <eugene.zhuk@gmail.com>
-Evgeny Safronov <division494@gmail.com>
-Federico Ficarelli <federico.ficarelli@gmail.com>
-Felix Homann <linuxaudio@showlabor.de>
-Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
-Jern-Kuan Leong <jernkuan@gmail.com>
-JianXiong Zhou <zhoujianxiong2@gmail.com>
-Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
-John Millikin <jmillikin@stripe.com>
-Jussi Knuuttila <jussi.knuuttila@gmail.com>
-Kai Wolf <kai.wolf@gmail.com>
-Kishan Kumar <kumar.kishan@outlook.com>
-Kaito Udagawa <umireon@gmail.com>
-Lei Xu <eddyxu@gmail.com>
-Matt Clarkson <mattyclarkson@gmail.com>
-Maxim Vafin <maxvafin@gmail.com>
-Nick Hutchinson <nshutchinson@gmail.com>
-Oleksandr Sochka <sasha.sochka@gmail.com>
-Ori Livneh <ori.livneh@gmail.com>
-Pascal Leroy <phl@google.com>
-Paul Redmond <paul.redmond@gmail.com>
-Pierre Phaneuf <pphaneuf@google.com>
-Radoslav Yovchev <radoslav.tm@gmail.com>
-Raul Marin <rmrodriguez@cartodb.com>
-Ray Glover <ray.glover@uk.ibm.com>
-Robert Guo <robert.guo@mongodb.com>
-Roman Lebedev <lebedev.ri@gmail.com>
-Shuo Chen <chenshuo@chenshuo.com>
-Tobias Ulvgård <tobias.ulvgard@dirac.se>
-Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
-Yixuan Qiu <yixuanq@gmail.com>
-Yusuke Suzuki <utatane.tea@gmail.com>
-Zbigniew Skowron <zbychs@gmail.com>
diff --git a/third_party/google-benchmark/LICENSE b/third_party/google-benchmark/LICENSE
deleted file mode 100644
index d645695..0000000
--- a/third_party/google-benchmark/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
-      publicly display, publicly perform, sublicense, and distribute the
-      Work and such Derivative Works in Source or Object form.
-
-   3. Grant of Patent License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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diff --git a/third_party/google-benchmark/README.md b/third_party/google-benchmark/README.md
deleted file mode 100644
index 858ea23..0000000
--- a/third_party/google-benchmark/README.md
+++ /dev/null
@@ -1,998 +0,0 @@
-# benchmark
-[![Build Status](https://travis-ci.org/google/benchmark.svg?branch=master)](https://travis-ci.org/google/benchmark)
-[![Build status](https://ci.appveyor.com/api/projects/status/u0qsyp7t1tk7cpxs/branch/master?svg=true)](https://ci.appveyor.com/project/google/benchmark/branch/master)
-[![Coverage Status](https://coveralls.io/repos/google/benchmark/badge.svg)](https://coveralls.io/r/google/benchmark)
-[![slackin](https://slackin-iqtfqnpzxd.now.sh/badge.svg)](https://slackin-iqtfqnpzxd.now.sh/)
-
-A library to support the benchmarking of functions, similar to unit-tests.
-
-[Discussion group](https://groups.google.com/d/forum/benchmark-discuss)
-
-IRC channel: [freenode](https://freenode.net) #googlebenchmark
-
-[Additional Tooling Documentation](docs/tools.md)
-
-[Assembly Testing Documentation](docs/AssemblyTests.md)
-
-
-## Building
-
-The basic steps for configuring and building the library look like this:
-
-```bash
-$ git clone https://github.com/google/benchmark.git
-# Benchmark requires Google Test as a dependency. Add the source tree as a subdirectory.
-$ git clone https://github.com/google/googletest.git benchmark/googletest
-$ mkdir build && cd build
-$ cmake -G <generator> [options] ../benchmark
-# Assuming a makefile generator was used
-$ make
-```
-
-Note that Google Benchmark requires Google Test to build and run the tests. This
-dependency can be provided two ways:
-
-* Checkout the Google Test sources into `benchmark/googletest` as above.
-* Otherwise, if `-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON` is specified during
-  configuration, the library will automatically download and build any required
-  dependencies.
-
-If you do not wish to build and run the tests, add `-DBENCHMARK_ENABLE_GTEST_TESTS=OFF`
-to `CMAKE_ARGS`.
-
-
-## Installation Guide
-
-For Ubuntu and Debian Based System
-
-First make sure you have git and cmake installed (If not please install them)
-
-```
-sudo apt-get install git cmake
-```
-
-Now, let's clone the repository and build it
-
-```
-git clone https://github.com/google/benchmark.git
-cd benchmark
-# If you want to build tests and don't use BENCHMARK_DOWNLOAD_DEPENDENCIES, then
-# git clone https://github.com/google/googletest.git
-mkdir build
-cd build
-cmake .. -DCMAKE_BUILD_TYPE=RELEASE
-make
-```
-
-If you need to install the library globally
-
-```
-sudo make install
-```
-
-## Stable and Experimental Library Versions
-
-The main branch contains the latest stable version of the benchmarking library;
-the API of which can be considered largely stable, with source breaking changes
-being made only upon the release of a new major version.
-
-Newer, experimental, features are implemented and tested on the
-[`v2` branch](https://github.com/google/benchmark/tree/v2). Users who wish
-to use, test, and provide feedback on the new features are encouraged to try
-this branch. However, this branch provides no stability guarantees and reserves
-the right to change and break the API at any time.
-
-## Further knowledge
-
-It may help to read the [Google Test documentation](https://github.com/google/googletest/blob/master/googletest/docs/primer.md)
-as some of the structural aspects of the APIs are similar.
-
-## Example usage
-### Basic usage
-Define a function that executes the code to be measured, register it as a
-benchmark function using the `BENCHMARK` macro, and ensure an appropriate `main`
-function is available:
-
-```c++
-#include <benchmark/benchmark.h>
-
-static void BM_StringCreation(benchmark::State& state) {
-  for (auto _ : state)
-    std::string empty_string;
-}
-// Register the function as a benchmark
-BENCHMARK(BM_StringCreation);
-
-// Define another benchmark
-static void BM_StringCopy(benchmark::State& state) {
-  std::string x = "hello";
-  for (auto _ : state)
-    std::string copy(x);
-}
-BENCHMARK(BM_StringCopy);
-
-BENCHMARK_MAIN();
-```
-
-Don't forget to inform your linker to add benchmark library e.g. through 
-`-lbenchmark` compilation flag. Alternatively, you may leave out the 
-`BENCHMARK_MAIN();` at the end of the source file and link against 
-`-lbenchmark_main` to get the same default behavior.
-
-The benchmark library will measure and report the timing for code within the
-`for(...)` loop.
-
-#### Platform-specific libraries
-When the library is built using GCC it is necessary to link with the pthread
-library due to how GCC implements `std::thread`. Failing to link to pthread will
-lead to runtime exceptions (unless you're using libc++), not linker errors. See
-[issue #67](https://github.com/google/benchmark/issues/67) for more details. You
-can link to pthread by adding `-pthread` to your linker command. Note, you can
-also use `-lpthread`, but there are potential issues with ordering of command
-line parameters if you use that.
-
-If you're running benchmarks on Windows, the shlwapi library (`-lshlwapi`) is
-also required.
-
-If you're running benchmarks on solaris, you'll want the kstat library linked in
-too (`-lkstat`).
-
-### Passing arguments
-Sometimes a family of benchmarks can be implemented with just one routine that
-takes an extra argument to specify which one of the family of benchmarks to
-run. For example, the following code defines a family of benchmarks for
-measuring the speed of `memcpy()` calls of different lengths:
-
-```c++
-static void BM_memcpy(benchmark::State& state) {
-  char* src = new char[state.range(0)];
-  char* dst = new char[state.range(0)];
-  memset(src, 'x', state.range(0));
-  for (auto _ : state)
-    memcpy(dst, src, state.range(0));
-  state.SetBytesProcessed(int64_t(state.iterations()) *
-                          int64_t(state.range(0)));
-  delete[] src;
-  delete[] dst;
-}
-BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
-```
-
-The preceding code is quite repetitive, and can be replaced with the following
-short-hand. The following invocation will pick a few appropriate arguments in
-the specified range and will generate a benchmark for each such argument.
-
-```c++
-BENCHMARK(BM_memcpy)->Range(8, 8<<10);
-```
-
-By default the arguments in the range are generated in multiples of eight and
-the command above selects [ 8, 64, 512, 4k, 8k ]. In the following code the
-range multiplier is changed to multiples of two.
-
-```c++
-BENCHMARK(BM_memcpy)->RangeMultiplier(2)->Range(8, 8<<10);
-```
-Now arguments generated are [ 8, 16, 32, 64, 128, 256, 512, 1024, 2k, 4k, 8k ].
-
-You might have a benchmark that depends on two or more inputs. For example, the
-following code defines a family of benchmarks for measuring the speed of set
-insertion.
-
-```c++
-static void BM_SetInsert(benchmark::State& state) {
-  std::set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert)
-    ->Args({1<<10, 128})
-    ->Args({2<<10, 128})
-    ->Args({4<<10, 128})
-    ->Args({8<<10, 128})
-    ->Args({1<<10, 512})
-    ->Args({2<<10, 512})
-    ->Args({4<<10, 512})
-    ->Args({8<<10, 512});
-```
-
-The preceding code is quite repetitive, and can be replaced with the following
-short-hand. The following macro will pick a few appropriate arguments in the
-product of the two specified ranges and will generate a benchmark for each such
-pair.
-
-```c++
-BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
-```
-
-For more complex patterns of inputs, passing a custom function to `Apply` allows
-programmatic specification of an arbitrary set of arguments on which to run the
-benchmark. The following example enumerates a dense range on one parameter,
-and a sparse range on the second.
-
-```c++
-static void CustomArguments(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i <= 10; ++i)
-    for (int j = 32; j <= 1024*1024; j *= 8)
-      b->Args({i, j});
-}
-BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
-```
-
-### Calculate asymptotic complexity (Big O)
-Asymptotic complexity might be calculated for a family of benchmarks. The
-following code will calculate the coefficient for the high-order term in the
-running time and the normalized root-mean square error of string comparison.
-
-```c++
-static void BM_StringCompare(benchmark::State& state) {
-  std::string s1(state.range(0), '-');
-  std::string s2(state.range(0), '-');
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s1.compare(s2));
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_StringCompare)
-    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity(benchmark::oN);
-```
-
-As shown in the following invocation, asymptotic complexity might also be
-calculated automatically.
-
-```c++
-BENCHMARK(BM_StringCompare)
-    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity();
-```
-
-The following code will specify asymptotic complexity with a lambda function,
-that might be used to customize high-order term calculation.
-
-```c++
-BENCHMARK(BM_StringCompare)->RangeMultiplier(2)
-    ->Range(1<<10, 1<<18)->Complexity([](int64_t n)->double{return n; });
-```
-
-### Templated benchmarks
-Templated benchmarks work the same way: This example produces and consumes
-messages of size `sizeof(v)` `range_x` times. It also outputs throughput in the
-absence of multiprogramming.
-
-```c++
-template <class Q> void BM_Sequential(benchmark::State& state) {
-  Q q;
-  typename Q::value_type v;
-  for (auto _ : state) {
-    for (int i = state.range(0); i--; )
-      q.push(v);
-    for (int e = state.range(0); e--; )
-      q.Wait(&v);
-  }
-  // actually messages, not bytes:
-  state.SetBytesProcessed(
-      static_cast<int64_t>(state.iterations())*state.range(0));
-}
-BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
-```
-
-Three macros are provided for adding benchmark templates.
-
-```c++
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE(func, ...) // Takes any number of parameters.
-#else // C++ < C++11
-#define BENCHMARK_TEMPLATE(func, arg1)
-#endif
-#define BENCHMARK_TEMPLATE1(func, arg1)
-#define BENCHMARK_TEMPLATE2(func, arg1, arg2)
-```
-
-### A Faster KeepRunning loop
-
-In C++11 mode, a ranged-based for loop should be used in preference to
-the `KeepRunning` loop for running the benchmarks. For example:
-
-```c++
-static void BM_Fast(benchmark::State &state) {
-  for (auto _ : state) {
-    FastOperation();
-  }
-}
-BENCHMARK(BM_Fast);
-```
-
-The reason the ranged-for loop is faster than using `KeepRunning`, is
-because `KeepRunning` requires a memory load and store of the iteration count
-ever iteration, whereas the ranged-for variant is able to keep the iteration count
-in a register.
-
-For example, an empty inner loop of using the ranged-based for method looks like:
-
-```asm
-# Loop Init
-  mov rbx, qword ptr [r14 + 104]
-  call benchmark::State::StartKeepRunning()
-  test rbx, rbx
-  je .LoopEnd
-.LoopHeader: # =>This Inner Loop Header: Depth=1
-  add rbx, -1
-  jne .LoopHeader
-.LoopEnd:
-```
-
-Compared to an empty `KeepRunning` loop, which looks like:
-
-```asm
-.LoopHeader: # in Loop: Header=BB0_3 Depth=1
-  cmp byte ptr [rbx], 1
-  jne .LoopInit
-.LoopBody: # =>This Inner Loop Header: Depth=1
-  mov rax, qword ptr [rbx + 8]
-  lea rcx, [rax + 1]
-  mov qword ptr [rbx + 8], rcx
-  cmp rax, qword ptr [rbx + 104]
-  jb .LoopHeader
-  jmp .LoopEnd
-.LoopInit:
-  mov rdi, rbx
-  call benchmark::State::StartKeepRunning()
-  jmp .LoopBody
-.LoopEnd:
-```
-
-Unless C++03 compatibility is required, the ranged-for variant of writing
-the benchmark loop should be preferred.  
-
-## Passing arbitrary arguments to a benchmark
-In C++11 it is possible to define a benchmark that takes an arbitrary number
-of extra arguments. The `BENCHMARK_CAPTURE(func, test_case_name, ...args)`
-macro creates a benchmark that invokes `func`  with the `benchmark::State` as
-the first argument followed by the specified `args...`.
-The `test_case_name` is appended to the name of the benchmark and
-should describe the values passed.
-
-```c++
-template <class ...ExtraArgs>
-void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
-  [...]
-}
-// Registers a benchmark named "BM_takes_args/int_string_test" that passes
-// the specified values to `extra_args`.
-BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
-```
-Note that elements of `...args` may refer to global variables. Users should
-avoid modifying global state inside of a benchmark.
-
-## Using RegisterBenchmark(name, fn, args...)
-
-The `RegisterBenchmark(name, func, args...)` function provides an alternative
-way to create and register benchmarks.
-`RegisterBenchmark(name, func, args...)` creates, registers, and returns a
-pointer to a new benchmark with the specified `name` that invokes
-`func(st, args...)` where `st` is a `benchmark::State` object.
-
-Unlike the `BENCHMARK` registration macros, which can only be used at the global
-scope, the `RegisterBenchmark` can be called anywhere. This allows for
-benchmark tests to be registered programmatically.
-
-Additionally `RegisterBenchmark` allows any callable object to be registered
-as a benchmark. Including capturing lambdas and function objects.
-
-For Example:
-```c++
-auto BM_test = [](benchmark::State& st, auto Inputs) { /* ... */ };
-
-int main(int argc, char** argv) {
-  for (auto& test_input : { /* ... */ })
-      benchmark::RegisterBenchmark(test_input.name(), BM_test, test_input);
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-}
-```
-
-### Multithreaded benchmarks
-In a multithreaded test (benchmark invoked by multiple threads simultaneously),
-it is guaranteed that none of the threads will start until all have reached
-the start of the benchmark loop, and all will have finished before any thread
-exits the benchmark loop. (This behavior is also provided by the `KeepRunning()`
-API) As such, any global setup or teardown can be wrapped in a check against the thread
-index:
-
-```c++
-static void BM_MultiThreaded(benchmark::State& state) {
-  if (state.thread_index == 0) {
-    // Setup code here.
-  }
-  for (auto _ : state) {
-    // Run the test as normal.
-  }
-  if (state.thread_index == 0) {
-    // Teardown code here.
-  }
-}
-BENCHMARK(BM_MultiThreaded)->Threads(2);
-```
-
-If the benchmarked code itself uses threads and you want to compare it to
-single-threaded code, you may want to use real-time ("wallclock") measurements
-for latency comparisons:
-
-```c++
-BENCHMARK(BM_test)->Range(8, 8<<10)->UseRealTime();
-```
-
-Without `UseRealTime`, CPU time is used by default.
-
-## Controlling timers
-Normally, the entire duration of the work loop (`for (auto _ : state) {}`)
-is measured. But sometimes, it is nessesary to do some work inside of
-that loop, every iteration, but without counting that time to the benchmark time.
-That is possible, althought it is not recommended, since it has high overhead.
-
-```c++
-static void BM_SetInsert_With_Timer_Control(benchmark::State& state) {
-  std::set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming(); // Stop timers. They will not count until they are resumed.
-    data = ConstructRandomSet(state.range(0)); // Do something that should not be measured
-    state.ResumeTiming(); // And resume timers. They are now counting again.
-    // The rest will be measured.
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert_With_Timer_Control)->Ranges({{1<<10, 8<<10}, {128, 512}});
-```
-
-## Manual timing
-For benchmarking something for which neither CPU time nor real-time are
-correct or accurate enough, completely manual timing is supported using
-the `UseManualTime` function.
-
-When `UseManualTime` is used, the benchmarked code must call
-`SetIterationTime` once per iteration of the benchmark loop to
-report the manually measured time.
-
-An example use case for this is benchmarking GPU execution (e.g. OpenCL
-or CUDA kernels, OpenGL or Vulkan or Direct3D draw calls), which cannot
-be accurately measured using CPU time or real-time. Instead, they can be
-measured accurately using a dedicated API, and these measurement results
-can be reported back with `SetIterationTime`.
-
-```c++
-static void BM_ManualTiming(benchmark::State& state) {
-  int microseconds = state.range(0);
-  std::chrono::duration<double, std::micro> sleep_duration {
-    static_cast<double>(microseconds)
-  };
-
-  for (auto _ : state) {
-    auto start = std::chrono::high_resolution_clock::now();
-    // Simulate some useful workload with a sleep
-    std::this_thread::sleep_for(sleep_duration);
-    auto end   = std::chrono::high_resolution_clock::now();
-
-    auto elapsed_seconds =
-      std::chrono::duration_cast<std::chrono::duration<double>>(
-        end - start);
-
-    state.SetIterationTime(elapsed_seconds.count());
-  }
-}
-BENCHMARK(BM_ManualTiming)->Range(1, 1<<17)->UseManualTime();
-```
-
-### Preventing optimisation
-To prevent a value or expression from being optimized away by the compiler
-the `benchmark::DoNotOptimize(...)` and `benchmark::ClobberMemory()`
-functions can be used.
-
-```c++
-static void BM_test(benchmark::State& state) {
-  for (auto _ : state) {
-      int x = 0;
-      for (int i=0; i < 64; ++i) {
-        benchmark::DoNotOptimize(x += i);
-      }
-  }
-}
-```
-
-`DoNotOptimize(<expr>)` forces the  *result* of `<expr>` to be stored in either
-memory or a register. For GNU based compilers it acts as read/write barrier
-for global memory. More specifically it forces the compiler to flush pending
-writes to memory and reload any other values as necessary.
-
-Note that `DoNotOptimize(<expr>)` does not prevent optimizations on `<expr>`
-in any way. `<expr>` may even be removed entirely when the result is already
-known. For example:
-
-```c++
-  /* Example 1: `<expr>` is removed entirely. */
-  int foo(int x) { return x + 42; }
-  while (...) DoNotOptimize(foo(0)); // Optimized to DoNotOptimize(42);
-
-  /*  Example 2: Result of '<expr>' is only reused */
-  int bar(int) __attribute__((const));
-  while (...) DoNotOptimize(bar(0)); // Optimized to:
-  // int __result__ = bar(0);
-  // while (...) DoNotOptimize(__result__);
-```
-
-The second tool for preventing optimizations is `ClobberMemory()`. In essence
-`ClobberMemory()` forces the compiler to perform all pending writes to global
-memory. Memory managed by block scope objects must be "escaped" using
-`DoNotOptimize(...)` before it can be clobbered. In the below example
-`ClobberMemory()` prevents the call to `v.push_back(42)` from being optimized
-away.
-
-```c++
-static void BM_vector_push_back(benchmark::State& state) {
-  for (auto _ : state) {
-    std::vector<int> v;
-    v.reserve(1);
-    benchmark::DoNotOptimize(v.data()); // Allow v.data() to be clobbered.
-    v.push_back(42);
-    benchmark::ClobberMemory(); // Force 42 to be written to memory.
-  }
-}
-```
-
-Note that `ClobberMemory()` is only available for GNU or MSVC based compilers.
-
-### Set time unit manually
-If a benchmark runs a few milliseconds it may be hard to visually compare the
-measured times, since the output data is given in nanoseconds per default. In
-order to manually set the time unit, you can specify it manually:
-
-```c++
-BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
-```
-
-### Reporting the mean, median and standard deviation by repeated benchmarks
-By default each benchmark is run once and that single result is reported.
-However benchmarks are often noisy and a single result may not be representative
-of the overall behavior. For this reason it's possible to repeatedly rerun the
-benchmark.
-
-The number of runs of each benchmark is specified globally by the
-`--benchmark_repetitions` flag or on a per benchmark basis by calling
-`Repetitions` on the registered benchmark object. When a benchmark is run more
-than once the mean, median and standard deviation of the runs will be reported.
-
-Additionally the `--benchmark_report_aggregates_only={true|false}`,
-`--benchmark_display_aggregates_only={true|false}` flags or
-`ReportAggregatesOnly(bool)`, `DisplayAggregatesOnly(bool)` functions can be
-used to change how repeated tests are reported. By default the result of each
-repeated run is reported. When `report aggregates only` option is `true`,
-only the aggregates (i.e. mean, median and standard deviation, maybe complexity
-measurements if they were requested) of the runs is reported, to both the
-reporters - standard output (console), and the file.
-However when only the `display aggregates only` option is `true`,
-only the aggregates are displayed in the standard output, while the file
-output still contains everything.
-Calling `ReportAggregatesOnly(bool)` / `DisplayAggregatesOnly(bool)` on a
-registered benchmark object overrides the value of the appropriate flag for that
-benchmark.
-
-## User-defined statistics for repeated benchmarks
-While having mean, median and standard deviation is nice, this may not be
-enough for everyone. For example you may want to know what is the largest
-observation, e.g. because you have some real-time constraints. This is easy.
-The following code will specify a custom statistic to be calculated, defined
-by a lambda function.
-
-```c++
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK(BM_spin_empty)
-  ->ComputeStatistics("max", [](const std::vector<double>& v) -> double {
-    return *(std::max_element(std::begin(v), std::end(v)));
-  })
-  ->Arg(512);
-```
-
-## Fixtures
-Fixture tests are created by
-first defining a type that derives from `::benchmark::Fixture` and then
-creating/registering the tests using the following macros:
-
-* `BENCHMARK_F(ClassName, Method)`
-* `BENCHMARK_DEFINE_F(ClassName, Method)`
-* `BENCHMARK_REGISTER_F(ClassName, Method)`
-
-For Example:
-
-```c++
-class MyFixture : public benchmark::Fixture {};
-
-BENCHMARK_F(MyFixture, FooTest)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_DEFINE_F(MyFixture, BarTest)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-/* BarTest is NOT registered */
-BENCHMARK_REGISTER_F(MyFixture, BarTest)->Threads(2);
-/* BarTest is now registered */
-```
-
-### Templated fixtures
-Also you can create templated fixture by using the following macros:
-
-* `BENCHMARK_TEMPLATE_F(ClassName, Method, ...)`
-* `BENCHMARK_TEMPLATE_DEFINE_F(ClassName, Method, ...)`
-
-For example:
-```c++
-template<typename T>
-class MyFixture : public benchmark::Fixture {};
-
-BENCHMARK_TEMPLATE_F(MyFixture, IntTest, int)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, DoubleTest, double)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_REGISTER_F(MyFixture, DoubleTest)->Threads(2);
-```
-
-## User-defined counters
-
-You can add your own counters with user-defined names. The example below
-will add columns "Foo", "Bar" and "Baz" in its output:
-
-```c++
-static void UserCountersExample1(benchmark::State& state) {
-  double numFoos = 0, numBars = 0, numBazs = 0;
-  for (auto _ : state) {
-    // ... count Foo,Bar,Baz events
-  }
-  state.counters["Foo"] = numFoos;
-  state.counters["Bar"] = numBars;
-  state.counters["Baz"] = numBazs;
-}
-```
-
-The `state.counters` object is a `std::map` with `std::string` keys
-and `Counter` values. The latter is a `double`-like class, via an implicit
-conversion to `double&`. Thus you can use all of the standard arithmetic
-assignment operators (`=,+=,-=,*=,/=`) to change the value of each counter.
-
-In multithreaded benchmarks, each counter is set on the calling thread only.
-When the benchmark finishes, the counters from each thread will be summed;
-the resulting sum is the value which will be shown for the benchmark.
-
-The `Counter` constructor accepts three parameters: the value as a `double`
-; a bit flag which allows you to show counters as rates, and/or as per-thread
-iteration, and/or as per-thread averages, and/or iteration invariants;
-and a flag specifying the 'unit' - i.e. is 1k a 1000 (default,
-`benchmark::Counter::OneK::kIs1000`), or 1024
-(`benchmark::Counter::OneK::kIs1024`)?
-
-```c++
-  // sets a simple counter
-  state.counters["Foo"] = numFoos;
-
-  // Set the counter as a rate. It will be presented divided
-  // by the duration of the benchmark.
-  state.counters["FooRate"] = Counter(numFoos, benchmark::Counter::kIsRate);
-
-  // Set the counter as a thread-average quantity. It will
-  // be presented divided by the number of threads.
-  state.counters["FooAvg"] = Counter(numFoos, benchmark::Counter::kAvgThreads);
-
-  // There's also a combined flag:
-  state.counters["FooAvgRate"] = Counter(numFoos,benchmark::Counter::kAvgThreadsRate);
-
-  // This says that we process with the rate of state.range(0) bytes every iteration:
-  state.counters["BytesProcessed"] = Counter(state.range(0), benchmark::Counter::kIsIterationInvariantRate, benchmark::Counter::OneK::kIs1024);
-```
-
-When you're compiling in C++11 mode or later you can use `insert()` with
-`std::initializer_list`:
-
-```c++
-  // With C++11, this can be done:
-  state.counters.insert({{"Foo", numFoos}, {"Bar", numBars}, {"Baz", numBazs}});
-  // ... instead of:
-  state.counters["Foo"] = numFoos;
-  state.counters["Bar"] = numBars;
-  state.counters["Baz"] = numBazs;
-```
-
-### Counter reporting
-
-When using the console reporter, by default, user counters are are printed at
-the end after the table, the same way as ``bytes_processed`` and
-``items_processed``. This is best for cases in which there are few counters,
-or where there are only a couple of lines per benchmark. Here's an example of
-the default output:
-
-```
-------------------------------------------------------------------------------
-Benchmark                        Time           CPU Iterations UserCounters...
-------------------------------------------------------------------------------
-BM_UserCounter/threads:8      2248 ns      10277 ns      68808 Bar=16 Bat=40 Baz=24 Foo=8
-BM_UserCounter/threads:1      9797 ns       9788 ns      71523 Bar=2 Bat=5 Baz=3 Foo=1024m
-BM_UserCounter/threads:2      4924 ns       9842 ns      71036 Bar=4 Bat=10 Baz=6 Foo=2
-BM_UserCounter/threads:4      2589 ns      10284 ns      68012 Bar=8 Bat=20 Baz=12 Foo=4
-BM_UserCounter/threads:8      2212 ns      10287 ns      68040 Bar=16 Bat=40 Baz=24 Foo=8
-BM_UserCounter/threads:16     1782 ns      10278 ns      68144 Bar=32 Bat=80 Baz=48 Foo=16
-BM_UserCounter/threads:32     1291 ns      10296 ns      68256 Bar=64 Bat=160 Baz=96 Foo=32
-BM_UserCounter/threads:4      2615 ns      10307 ns      68040 Bar=8 Bat=20 Baz=12 Foo=4
-BM_Factorial                    26 ns         26 ns   26608979 40320
-BM_Factorial/real_time          26 ns         26 ns   26587936 40320
-BM_CalculatePiRange/1           16 ns         16 ns   45704255 0
-BM_CalculatePiRange/8           73 ns         73 ns    9520927 3.28374
-BM_CalculatePiRange/64         609 ns        609 ns    1140647 3.15746
-BM_CalculatePiRange/512       4900 ns       4901 ns     142696 3.14355
-```
-
-If this doesn't suit you, you can print each counter as a table column by
-passing the flag `--benchmark_counters_tabular=true` to the benchmark
-application. This is best for cases in which there are a lot of counters, or
-a lot of lines per individual benchmark. Note that this will trigger a
-reprinting of the table header any time the counter set changes between
-individual benchmarks. Here's an example of corresponding output when
-`--benchmark_counters_tabular=true` is passed:
-
-```
----------------------------------------------------------------------------------------
-Benchmark                        Time           CPU Iterations    Bar   Bat   Baz   Foo
----------------------------------------------------------------------------------------
-BM_UserCounter/threads:8      2198 ns       9953 ns      70688     16    40    24     8
-BM_UserCounter/threads:1      9504 ns       9504 ns      73787      2     5     3     1
-BM_UserCounter/threads:2      4775 ns       9550 ns      72606      4    10     6     2
-BM_UserCounter/threads:4      2508 ns       9951 ns      70332      8    20    12     4
-BM_UserCounter/threads:8      2055 ns       9933 ns      70344     16    40    24     8
-BM_UserCounter/threads:16     1610 ns       9946 ns      70720     32    80    48    16
-BM_UserCounter/threads:32     1192 ns       9948 ns      70496     64   160    96    32
-BM_UserCounter/threads:4      2506 ns       9949 ns      70332      8    20    12     4
---------------------------------------------------------------
-Benchmark                        Time           CPU Iterations
---------------------------------------------------------------
-BM_Factorial                    26 ns         26 ns   26392245 40320
-BM_Factorial/real_time          26 ns         26 ns   26494107 40320
-BM_CalculatePiRange/1           15 ns         15 ns   45571597 0
-BM_CalculatePiRange/8           74 ns         74 ns    9450212 3.28374
-BM_CalculatePiRange/64         595 ns        595 ns    1173901 3.15746
-BM_CalculatePiRange/512       4752 ns       4752 ns     147380 3.14355
-BM_CalculatePiRange/4k       37970 ns      37972 ns      18453 3.14184
-BM_CalculatePiRange/32k     303733 ns     303744 ns       2305 3.14162
-BM_CalculatePiRange/256k   2434095 ns    2434186 ns        288 3.1416
-BM_CalculatePiRange/1024k  9721140 ns    9721413 ns         71 3.14159
-BM_CalculatePi/threads:8      2255 ns       9943 ns      70936
-```
-Note above the additional header printed when the benchmark changes from
-``BM_UserCounter`` to ``BM_Factorial``. This is because ``BM_Factorial`` does
-not have the same counter set as ``BM_UserCounter``.
-
-## Exiting Benchmarks in Error
-
-When errors caused by external influences, such as file I/O and network
-communication, occur within a benchmark the
-`State::SkipWithError(const char* msg)` function can be used to skip that run
-of benchmark and report the error. Note that only future iterations of the
-`KeepRunning()` are skipped. For the ranged-for version of the benchmark loop
-Users must explicitly exit the loop, otherwise all iterations will be performed.
-Users may explicitly return to exit the benchmark immediately.
-
-The `SkipWithError(...)` function may be used at any point within the benchmark,
-including before and after the benchmark loop.
-
-For example:
-
-```c++
-static void BM_test(benchmark::State& state) {
-  auto resource = GetResource();
-  if (!resource.good()) {
-      state.SkipWithError("Resource is not good!");
-      // KeepRunning() loop will not be entered.
-  }
-  for (state.KeepRunning()) {
-      auto data = resource.read_data();
-      if (!resource.good()) {
-        state.SkipWithError("Failed to read data!");
-        break; // Needed to skip the rest of the iteration.
-     }
-     do_stuff(data);
-  }
-}
-
-static void BM_test_ranged_fo(benchmark::State & state) {
-  state.SkipWithError("test will not be entered");
-  for (auto _ : state) {
-    state.SkipWithError("Failed!");
-    break; // REQUIRED to prevent all further iterations.
-  }
-}
-```
-
-## Running a subset of the benchmarks
-
-The `--benchmark_filter=<regex>` option can be used to only run the benchmarks
-which match the specified `<regex>`. For example:
-
-```bash
-$ ./run_benchmarks.x --benchmark_filter=BM_memcpy/32
-Run on (1 X 2300 MHz CPU )
-2016-06-25 19:34:24
-Benchmark              Time           CPU Iterations
-----------------------------------------------------
-BM_memcpy/32          11 ns         11 ns   79545455
-BM_memcpy/32k       2181 ns       2185 ns     324074
-BM_memcpy/32          12 ns         12 ns   54687500
-BM_memcpy/32k       1834 ns       1837 ns     357143
-```
-
-## Runtime and reporting considerations
-When the benchmark binary is executed, each benchmark function is run serially.
-The number of iterations to run is determined dynamically by running the
-benchmark a few times and measuring the time taken and ensuring that the
-ultimate result will be statistically stable. As such, faster benchmark
-functions will be run for more iterations than slower benchmark functions, and
-the number of iterations is thus reported.
-
-In all cases, the number of iterations for which the benchmark is run is
-governed by the amount of time the benchmark takes. Concretely, the number of
-iterations is at least one, not more than 1e9, until CPU time is greater than
-the minimum time, or the wallclock time is 5x minimum time. The minimum time is
-set per benchmark by calling `MinTime` on the registered benchmark object.
-
-Average timings are then reported over the iterations run. If multiple
-repetitions are requested using the `--benchmark_repetitions` command-line
-option, or at registration time, the benchmark function will be run several
-times and statistical results across these repetitions will also be reported.
-
-As well as the per-benchmark entries, a preamble in the report will include
-information about the machine on which the benchmarks are run.
-
-### Output Formats
-The library supports multiple output formats. Use the
-`--benchmark_format=<console|json|csv>` flag to set the format type. `console`
-is the default format.
-
-The Console format is intended to be a human readable format. By default
-the format generates color output. Context is output on stderr and the
-tabular data on stdout. Example tabular output looks like:
-```
-Benchmark                               Time(ns)    CPU(ns) Iterations
-----------------------------------------------------------------------
-BM_SetInsert/1024/1                        28928      29349      23853  133.097kB/s   33.2742k items/s
-BM_SetInsert/1024/8                        32065      32913      21375  949.487kB/s   237.372k items/s
-BM_SetInsert/1024/10                       33157      33648      21431  1.13369MB/s   290.225k items/s
-```
-
-The JSON format outputs human readable json split into two top level attributes.
-The `context` attribute contains information about the run in general, including
-information about the CPU and the date.
-The `benchmarks` attribute contains a list of every benchmark run. Example json
-output looks like:
-```json
-{
-  "context": {
-    "date": "2015/03/17-18:40:25",
-    "num_cpus": 40,
-    "mhz_per_cpu": 2801,
-    "cpu_scaling_enabled": false,
-    "build_type": "debug"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SetInsert/1024/1",
-      "iterations": 94877,
-      "real_time": 29275,
-      "cpu_time": 29836,
-      "bytes_per_second": 134066,
-      "items_per_second": 33516
-    },
-    {
-      "name": "BM_SetInsert/1024/8",
-      "iterations": 21609,
-      "real_time": 32317,
-      "cpu_time": 32429,
-      "bytes_per_second": 986770,
-      "items_per_second": 246693
-    },
-    {
-      "name": "BM_SetInsert/1024/10",
-      "iterations": 21393,
-      "real_time": 32724,
-      "cpu_time": 33355,
-      "bytes_per_second": 1199226,
-      "items_per_second": 299807
-    }
-  ]
-}
-```
-
-The CSV format outputs comma-separated values. The `context` is output on stderr
-and the CSV itself on stdout. Example CSV output looks like:
-```
-name,iterations,real_time,cpu_time,bytes_per_second,items_per_second,label
-"BM_SetInsert/1024/1",65465,17890.7,8407.45,475768,118942,
-"BM_SetInsert/1024/8",116606,18810.1,9766.64,3.27646e+06,819115,
-"BM_SetInsert/1024/10",106365,17238.4,8421.53,4.74973e+06,1.18743e+06,
-```
-
-### Output Files
-The library supports writing the output of the benchmark to a file specified
-by `--benchmark_out=<filename>`. The format of the output can be specified
-using `--benchmark_out_format={json|console|csv}`. Specifying
-`--benchmark_out` does not suppress the console output.
-
-## Result comparison
-
-It is possible to compare the benchmarking results. See [Additional Tooling Documentation](docs/tools.md)
-
-## Debug vs Release
-By default, benchmark builds as a debug library. You will see a warning in the
-output when this is the case. To build it as a release library instead, use:
-
-```
-cmake -DCMAKE_BUILD_TYPE=Release
-```
-
-To enable link-time optimisation, use
-
-```
-cmake -DCMAKE_BUILD_TYPE=Release -DBENCHMARK_ENABLE_LTO=true
-```
-
-If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake
-cache variables, if autodetection fails.
-
-If you are using clang, you may need to set `LLVMAR_EXECUTABLE`,
-`LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
-
-## Compiler Support
-
-Google Benchmark uses C++11 when building the library. As such we require
-a modern C++ toolchain, both compiler and standard library.
-
-The following minimum versions are strongly recommended build the library:
-
-* GCC 4.8
-* Clang 3.4
-* Visual Studio 2013
-* Intel 2015 Update 1
-
-Anything older *may* work.
-
-Note: Using the library and its headers in C++03 is supported. C++11 is only
-required to build the library.
-
-## Disable CPU frequency scaling
-If you see this error:
-```
-***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
-```
-you might want to disable the CPU frequency scaling while running the benchmark:
-```bash
-sudo cpupower frequency-set --governor performance
-./mybench
-sudo cpupower frequency-set --governor powersave
-```
diff --git a/third_party/google-benchmark/WORKSPACE b/third_party/google-benchmark/WORKSPACE
deleted file mode 100644
index 54734f1..0000000
--- a/third_party/google-benchmark/WORKSPACE
+++ /dev/null
@@ -1,7 +0,0 @@
-workspace(name = "com_github_google_benchmark")
-
-http_archive(
-     name = "com_google_googletest",
-     urls = ["https://github.com/google/googletest/archive/3f0cf6b62ad1eb50d8736538363d3580dd640c3e.zip"],
-     strip_prefix = "googletest-3f0cf6b62ad1eb50d8736538363d3580dd640c3e",
-)
diff --git a/third_party/google-benchmark/appveyor.yml b/third_party/google-benchmark/appveyor.yml
deleted file mode 100644
index cf24019..0000000
--- a/third_party/google-benchmark/appveyor.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-version: '{build}'
-
-image: Visual Studio 2017
-
-configuration:
-  - Debug
-  - Release
-
-environment:
-  matrix:
-    - compiler: msvc-15-seh
-      generator: "Visual Studio 15 2017"
-
-    - compiler: msvc-15-seh
-      generator: "Visual Studio 15 2017 Win64"
-
-    - compiler: msvc-14-seh
-      generator: "Visual Studio 14 2015"
-
-    - compiler: msvc-14-seh
-      generator: "Visual Studio 14 2015 Win64"
-
-    - compiler: gcc-5.3.0-posix
-      generator: "MinGW Makefiles"
-      cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-
-matrix:
-  fast_finish: true
-
-install:
-  # git bash conflicts with MinGW makefiles
-  - if "%generator%"=="MinGW Makefiles" (set "PATH=%PATH:C:\Program Files\Git\usr\bin;=%")
-  - if not "%cxx_path%"=="" (set "PATH=%PATH%;%cxx_path%")
-
-build_script:
-  - md _build -Force
-  - cd _build
-  - echo %configuration%
-  - cmake -G "%generator%" "-DCMAKE_BUILD_TYPE=%configuration%" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON ..
-  - cmake --build . --config %configuration%
-
-test_script:
-  - ctest -c %configuration% --timeout 300 --output-on-failure
-
-artifacts:
-  - path: '_build/CMakeFiles/*.log'
-    name: logs
-  - path: '_build/Testing/**/*.xml'
-    name: test_results
diff --git a/third_party/google-benchmark/benchmark.patch b/third_party/google-benchmark/benchmark.patch
new file mode 100644
index 0000000..4d4a6ff
--- /dev/null
+++ b/third_party/google-benchmark/benchmark.patch
@@ -0,0 +1,199 @@
+diff --git a/BUILD.bazel b/BUILD.bazel
+index 64f86ee..a588046 100644
+--- a/BUILD.bazel
++++ b/BUILD.bazel
+@@ -39,22 +39,25 @@ cc_library(
+         "include/benchmark/benchmark.h",
+         "include/benchmark/export.h",
+     ],
++    copts = [
++        "-Wno-format-nonliteral",
++    ],
++    defines = [
++        "BENCHMARK_STATIC_DEFINE",
++    ] + select({
++        ":perfcounters": ["HAVE_LIBPFM"],
++        "//conditions:default": [],
++    }),
+     linkopts = select({
+         ":windows": ["-DEFAULTLIB:shlwapi.lib"],
+         "//conditions:default": ["-pthread"],
+     }),
+-    strip_include_prefix = "include",
+-    visibility = ["//visibility:public"],
+     # Only static linking is allowed; no .so will be produced.
+     # Using `defines` (i.e. not `local_defines`) means that no
+     # dependent rules need to bother about defining the macro.
+     linkstatic = True,
+-    defines = [
+-        "BENCHMARK_STATIC_DEFINE",
+-    ] + select({
+-        ":perfcounters": ["HAVE_LIBPFM"],
+-        "//conditions:default": [],
+-    }),
++    strip_include_prefix = "include",
++    visibility = ["//visibility:public"],
+     deps = select({
+         ":perfcounters": ["@libpfm//:libpfm"],
+         "//conditions:default": [],
+@@ -64,7 +67,10 @@ cc_library(
+ cc_library(
+     name = "benchmark_main",
+     srcs = ["src/benchmark_main.cc"],
+-    hdrs = ["include/benchmark/benchmark.h", "include/benchmark/export.h"],
++    hdrs = [
++        "include/benchmark/benchmark.h",
++        "include/benchmark/export.h",
++    ],
+     strip_include_prefix = "include",
+     visibility = ["//visibility:public"],
+     deps = [":benchmark"],
+diff --git a/bindings/python/BUILD b/bindings/python/BUILD
+deleted file mode 100644
+index 9559a76..0000000
+--- a/bindings/python/BUILD
++++ /dev/null
+@@ -1,3 +0,0 @@
+-exports_files(glob(["*.BUILD"]))
+-exports_files(["build_defs.bzl"])
+-
+diff --git a/bindings/python/google_benchmark/BUILD b/bindings/python/google_benchmark/BUILD
+deleted file mode 100644
+index 3c1561f..0000000
+--- a/bindings/python/google_benchmark/BUILD
++++ /dev/null
+@@ -1,38 +0,0 @@
+-load("//bindings/python:build_defs.bzl", "py_extension")
+-
+-py_library(
+-    name = "google_benchmark",
+-    srcs = ["__init__.py"],
+-    visibility = ["//visibility:public"],
+-    deps = [
+-        ":_benchmark",
+-        # pip; absl:app
+-    ],
+-)
+-
+-py_extension(
+-    name = "_benchmark",
+-    srcs = ["benchmark.cc"],
+-    copts = [
+-        "-fexceptions",
+-        "-fno-strict-aliasing",
+-    ],
+-    features = ["-use_header_modules"],
+-    deps = [
+-        "//:benchmark",
+-        "@pybind11",
+-        "@python_headers",
+-    ],
+-)
+-
+-py_test(
+-    name = "example",
+-    srcs = ["example.py"],
+-    python_version = "PY3",
+-    srcs_version = "PY3",
+-    visibility = ["//visibility:public"],
+-    deps = [
+-        ":google_benchmark",
+-    ],
+-)
+-
+diff --git a/test/BUILD b/test/BUILD
+index 0a66bf3..4d62699 100644
+--- a/test/BUILD
++++ b/test/BUILD
+@@ -18,6 +18,10 @@ TEST_COPTS = [
+     #    "-Wshorten-64-to-32",
+     "-Wfloat-equal",
+     "-fstrict-aliasing",
++    "-Wno-unused-but-set-variable",
++    "-Wno-unused-variable",
++    "-Wno-unused-function",
++    "-Wno-unused-parameter",
+ ]
+ 
+ # Some of the issues with DoNotOptimize only occur when optimization is enabled
+@@ -27,12 +31,12 @@ PER_SRC_COPTS = {
+ 
+ TEST_ARGS = ["--benchmark_min_time=0.01"]
+ 
+-PER_SRC_TEST_ARGS = ({
++PER_SRC_TEST_ARGS = {
+     "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
+     "repetitions_test.cc": [" --benchmark_repetitions=3"],
+-    "spec_arg_test.cc" : ["--benchmark_filter=BM_NotChosen"],
+-    "spec_arg_verbosity_test.cc" : ["--v=42"],
+-})
++    "spec_arg_test.cc": ["--benchmark_filter=BM_NotChosen"],
++    "spec_arg_verbosity_test.cc": ["--v=42"],
++}
+ 
+ cc_library(
+     name = "output_test_helper",
+@@ -58,14 +62,14 @@ cc_library(
+         copts = select({
+             "//:windows": [],
+             "//conditions:default": TEST_COPTS,
+-        }) + PER_SRC_COPTS.get(test_src, []) ,
++        }) + PER_SRC_COPTS.get(test_src, []),
+         deps = [
+             ":output_test_helper",
+             "//:benchmark",
+             "//:benchmark_internal_headers",
+             "@com_google_googletest//:gtest",
+             "@com_google_googletest//:gtest_main",
+-        ]
++        ],
+         # FIXME: Add support for assembly tests to bazel.
+         # See Issue #556
+         # https://github.com/google/benchmark/issues/556
+@@ -85,6 +89,10 @@ cc_test(
+     size = "small",
+     srcs = ["cxx03_test.cc"],
+     copts = TEST_COPTS + ["-std=c++03"],
++    target_compatible_with = select({
++        "//:windows": ["@platforms//:incompatible"],
++        "//conditions:default": [],
++    }),
+     deps = [
+         ":output_test_helper",
+         "//:benchmark",
+@@ -92,10 +100,6 @@ cc_test(
+         "@com_google_googletest//:gtest",
+         "@com_google_googletest//:gtest_main",
+     ],
+-    target_compatible_with = select({
+-        "//:windows": ["@platforms//:incompatible"],
+-        "//conditions:default": [],
+-    })
+ )
+ 
+ cc_test(
+diff --git a/tools/BUILD.bazel b/tools/BUILD.bazel
+deleted file mode 100644
+index 5895883..0000000
+--- a/tools/BUILD.bazel
++++ /dev/null
+@@ -1,19 +0,0 @@
+-load("@py_deps//:requirements.bzl", "requirement")
+-
+-py_library(
+-    name = "gbench",
+-    srcs = glob(["gbench/*.py"]),
+-    deps = [
+-      requirement("numpy"),
+-      requirement("scipy"),
+-    ],
+-)
+-
+-py_binary(
+-    name = "compare",
+-    srcs = ["compare.py"],
+-    python_version = "PY2",
+-    deps = [
+-        ":gbench",
+-    ],
+-)
diff --git a/third_party/google-benchmark/cmake/AddCXXCompilerFlag.cmake b/third_party/google-benchmark/cmake/AddCXXCompilerFlag.cmake
deleted file mode 100644
index d0d2099..0000000
--- a/third_party/google-benchmark/cmake/AddCXXCompilerFlag.cmake
+++ /dev/null
@@ -1,74 +0,0 @@
-# - Adds a compiler flag if it is supported by the compiler
-#
-# This function checks that the supplied compiler flag is supported and then
-# adds it to the corresponding compiler flags
-#
-#  add_cxx_compiler_flag(<FLAG> [<VARIANT>])
-#
-# - Example
-#
-# include(AddCXXCompilerFlag)
-# add_cxx_compiler_flag(-Wall)
-# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
-# Requires CMake 2.6+
-
-if(__add_cxx_compiler_flag)
-  return()
-endif()
-set(__add_cxx_compiler_flag INCLUDED)
-
-include(CheckCXXCompilerFlag)
-
-function(mangle_compiler_flag FLAG OUTPUT)
-  string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
-  string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
-  string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
-  string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
-  set(${OUTPUT} "${SANITIZED_FLAG}" PARENT_SCOPE)
-endfunction(mangle_compiler_flag)
-
-function(add_cxx_compiler_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-  if(${MANGLED_FLAG})
-    set(VARIANT ${ARGV1})
-    if(ARGV1)
-      string(TOUPPER "_${VARIANT}" VARIANT)
-    endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
-  endif()
-endfunction()
-
-function(add_required_cxx_compiler_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-  if(${MANGLED_FLAG})
-    set(VARIANT ${ARGV1})
-    if(ARGV1)
-      string(TOUPPER "_${VARIANT}" VARIANT)
-    endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}" PARENT_SCOPE)
-  else()
-    message(FATAL_ERROR "Required flag '${FLAG}' is not supported by the compiler")
-  endif()
-endfunction()
-
-function(check_cxx_warning_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  # Add -Werror to ensure the compiler generates an error if the warning flag
-  # doesn't exist.
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-endfunction()
diff --git a/third_party/google-benchmark/cmake/CXXFeatureCheck.cmake b/third_party/google-benchmark/cmake/CXXFeatureCheck.cmake
deleted file mode 100644
index 99b56dd..0000000
--- a/third_party/google-benchmark/cmake/CXXFeatureCheck.cmake
+++ /dev/null
@@ -1,64 +0,0 @@
-# - Compile and run code to check for C++ features
-#
-# This functions compiles a source file under the `cmake` folder
-# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
-# environment
-#
-#  cxx_feature_check(<FLAG> [<VARIANT>])
-#
-# - Example
-#
-# include(CXXFeatureCheck)
-# cxx_feature_check(STD_REGEX)
-# Requires CMake 2.8.12+
-
-if(__cxx_feature_check)
-  return()
-endif()
-set(__cxx_feature_check INCLUDED)
-
-function(cxx_feature_check FILE)
-  string(TOLOWER ${FILE} FILE)
-  string(TOUPPER ${FILE} VAR)
-  string(TOUPPER "HAVE_${VAR}" FEATURE)
-  if (DEFINED HAVE_${VAR})
-    set(HAVE_${VAR} 1 PARENT_SCOPE)
-    add_definitions(-DHAVE_${VAR})
-    return()
-  endif()
-
-  if (NOT DEFINED COMPILE_${FEATURE})
-    message(STATUS "Performing Test ${FEATURE}")
-    if(CMAKE_CROSSCOMPILING)
-      try_compile(COMPILE_${FEATURE}
-              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
-              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
-              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
-      if(COMPILE_${FEATURE})
-        message(WARNING
-              "If you see build failures due to cross compilation, try setting HAVE_${VAR} to 0")
-        set(RUN_${FEATURE} 0)
-      else()
-        set(RUN_${FEATURE} 1)
-      endif()
-    else()
-      message(STATUS "Performing Test ${FEATURE}")
-      try_run(RUN_${FEATURE} COMPILE_${FEATURE}
-              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
-              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
-              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
-    endif()
-  endif()
-
-  if(RUN_${FEATURE} EQUAL 0)
-    message(STATUS "Performing Test ${FEATURE} -- success")
-    set(HAVE_${VAR} 1 PARENT_SCOPE)
-    add_definitions(-DHAVE_${VAR})
-  else()
-    if(NOT COMPILE_${FEATURE})
-      message(STATUS "Performing Test ${FEATURE} -- failed to compile")
-    else()
-      message(STATUS "Performing Test ${FEATURE} -- compiled but failed to run")
-    endif()
-  endif()
-endfunction()
diff --git a/third_party/google-benchmark/cmake/Config.cmake.in b/third_party/google-benchmark/cmake/Config.cmake.in
deleted file mode 100644
index 6e9256e..0000000
--- a/third_party/google-benchmark/cmake/Config.cmake.in
+++ /dev/null
@@ -1 +0,0 @@
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
diff --git a/third_party/google-benchmark/cmake/GetGitVersion.cmake b/third_party/google-benchmark/cmake/GetGitVersion.cmake
deleted file mode 100644
index 4f10f22..0000000
--- a/third_party/google-benchmark/cmake/GetGitVersion.cmake
+++ /dev/null
@@ -1,54 +0,0 @@
-# - Returns a version string from Git tags
-#
-# This function inspects the annotated git tags for the project and returns a string
-# into a CMake variable
-#
-#  get_git_version(<var>)
-#
-# - Example
-#
-# include(GetGitVersion)
-# get_git_version(GIT_VERSION)
-#
-# Requires CMake 2.8.11+
-find_package(Git)
-
-if(__get_git_version)
-  return()
-endif()
-set(__get_git_version INCLUDED)
-
-function(get_git_version var)
-  if(GIT_EXECUTABLE)
-      execute_process(COMMAND ${GIT_EXECUTABLE} describe --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          RESULT_VARIABLE status
-          OUTPUT_VARIABLE GIT_VERSION
-          ERROR_QUIET)
-      if(${status})
-          set(GIT_VERSION "v0.0.0")
-      else()
-          string(STRIP ${GIT_VERSION} GIT_VERSION)
-          string(REGEX REPLACE "-[0-9]+-g" "-" GIT_VERSION ${GIT_VERSION})
-      endif()
-
-      # Work out if the repository is dirty
-      execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_QUIET
-          ERROR_QUIET)
-      execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_VARIABLE GIT_DIFF_INDEX
-          ERROR_QUIET)
-      string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
-      if (${GIT_DIRTY})
-          set(GIT_VERSION "${GIT_VERSION}-dirty")
-      endif()
-  else()
-      set(GIT_VERSION "v0.0.0")
-  endif()
-
-  message(STATUS "git Version: ${GIT_VERSION}")
-  set(${var} ${GIT_VERSION} PARENT_SCOPE)
-endfunction()
diff --git a/third_party/google-benchmark/cmake/HandleGTest.cmake b/third_party/google-benchmark/cmake/HandleGTest.cmake
deleted file mode 100644
index b9c1443..0000000
--- a/third_party/google-benchmark/cmake/HandleGTest.cmake
+++ /dev/null
@@ -1,113 +0,0 @@
-
-include(split_list)
-
-macro(build_external_gtest)
-  include(ExternalProject)
-  set(GTEST_FLAGS "")
-  if (BENCHMARK_USE_LIBCXX)
-    if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-      list(APPEND GTEST_FLAGS -stdlib=libc++)
-    else()
-      message(WARNING "Unsupported compiler (${CMAKE_CXX_COMPILER}) when using libc++")
-    endif()
-  endif()
-  if (BENCHMARK_BUILD_32_BITS)
-    list(APPEND GTEST_FLAGS -m32)
-  endif()
-  if (NOT "${CMAKE_CXX_FLAGS}" STREQUAL "")
-    list(APPEND GTEST_FLAGS ${CMAKE_CXX_FLAGS})
-  endif()
-  string(TOUPPER "${CMAKE_BUILD_TYPE}" GTEST_BUILD_TYPE)
-  if ("${GTEST_BUILD_TYPE}" STREQUAL "COVERAGE")
-    set(GTEST_BUILD_TYPE "DEBUG")
-  endif()
-  # FIXME: Since 10/Feb/2017 the googletest trunk has had a bug where
-  # -Werror=unused-function fires during the build on OS X. This is a temporary
-  # workaround to keep our travis bots from failing. It should be removed
-  # once gtest is fixed.
-  if (NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
-    list(APPEND GTEST_FLAGS "-Wno-unused-function")
-  endif()
-  split_list(GTEST_FLAGS)
-  set(EXCLUDE_FROM_ALL_OPT "")
-  set(EXCLUDE_FROM_ALL_VALUE "")
-  if (${CMAKE_VERSION} VERSION_GREATER "3.0.99")
-      set(EXCLUDE_FROM_ALL_OPT "EXCLUDE_FROM_ALL")
-      set(EXCLUDE_FROM_ALL_VALUE "ON")
-  endif()
-  ExternalProject_Add(googletest
-      ${EXCLUDE_FROM_ALL_OPT} ${EXCLUDE_FROM_ALL_VALUE}
-      GIT_REPOSITORY https://github.com/google/googletest.git
-      GIT_TAG master
-      PREFIX "${CMAKE_BINARY_DIR}/googletest"
-      INSTALL_DIR "${CMAKE_BINARY_DIR}/googletest"
-      CMAKE_CACHE_ARGS
-        -DCMAKE_BUILD_TYPE:STRING=${GTEST_BUILD_TYPE}
-        -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
-        -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
-        -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
-        -DCMAKE_INSTALL_LIBDIR:PATH=<INSTALL_DIR>/lib
-        -DCMAKE_CXX_FLAGS:STRING=${GTEST_FLAGS}
-        -Dgtest_force_shared_crt:BOOL=ON
-      )
-
-  ExternalProject_Get_Property(googletest install_dir)
-  set(GTEST_INCLUDE_DIRS ${install_dir}/include)
-  file(MAKE_DIRECTORY ${GTEST_INCLUDE_DIRS})
-
-  set(LIB_SUFFIX "${CMAKE_STATIC_LIBRARY_SUFFIX}")
-  set(LIB_PREFIX "${CMAKE_STATIC_LIBRARY_PREFIX}")
-  if("${GTEST_BUILD_TYPE}" STREQUAL "DEBUG")
-    set(LIB_SUFFIX "d${CMAKE_STATIC_LIBRARY_SUFFIX}")
-  endif()
-
-  # Use gmock_main instead of gtest_main because it initializes gtest as well.
-  # Note: The libraries are listed in reverse order of their dependancies.
-  foreach(LIB gtest gmock gmock_main)
-    add_library(${LIB} UNKNOWN IMPORTED)
-    set_target_properties(${LIB} PROPERTIES
-      IMPORTED_LOCATION ${install_dir}/lib/${LIB_PREFIX}${LIB}${LIB_SUFFIX}
-      INTERFACE_INCLUDE_DIRECTORIES ${GTEST_INCLUDE_DIRS}
-      INTERFACE_LINK_LIBRARIES "${GTEST_BOTH_LIBRARIES}"
-    )
-    add_dependencies(${LIB} googletest)
-    list(APPEND GTEST_BOTH_LIBRARIES ${LIB})
-  endforeach()
-endmacro(build_external_gtest)
-
-if (BENCHMARK_ENABLE_GTEST_TESTS)
-  if (IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/googletest)
-    set(GTEST_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/googletest")
-    set(INSTALL_GTEST OFF CACHE INTERNAL "")
-    set(INSTALL_GMOCK OFF CACHE INTERNAL "")
-    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/googletest)
-    set(GTEST_BOTH_LIBRARIES gtest gmock gmock_main)
-    foreach(HEADER test mock)
-      # CMake 2.8 and older don't respect INTERFACE_INCLUDE_DIRECTORIES, so we
-      # have to add the paths ourselves.
-      set(HFILE g${HEADER}/g${HEADER}.h)
-      set(HPATH ${GTEST_ROOT}/google${HEADER}/include)
-      find_path(HEADER_PATH_${HEADER} ${HFILE}
-          NO_DEFAULT_PATHS
-          HINTS ${HPATH}
-      )
-      if (NOT HEADER_PATH_${HEADER})
-        message(FATAL_ERROR "Failed to find header ${HFILE} in ${HPATH}")
-      endif()
-      list(APPEND GTEST_INCLUDE_DIRS ${HEADER_PATH_${HEADER}})
-    endforeach()
-  elseif(BENCHMARK_DOWNLOAD_DEPENDENCIES)
-    build_external_gtest()
-  else()
-    find_package(GTest REQUIRED)
-    find_path(GMOCK_INCLUDE_DIRS gmock/gmock.h
-        HINTS ${GTEST_INCLUDE_DIRS})
-    if (NOT GMOCK_INCLUDE_DIRS)
-      message(FATAL_ERROR "Failed to find header gmock/gmock.h with hint ${GTEST_INCLUDE_DIRS}")
-    endif()
-    set(GTEST_INCLUDE_DIRS ${GTEST_INCLUDE_DIRS} ${GMOCK_INCLUDE_DIRS})
-    # FIXME: We don't currently require the gmock library to build the tests,
-    # and it's likely we won't find it, so we don't try. As long as we've
-    # found the gmock/gmock.h header and gtest_main that should be good enough.
-  endif()
-endif()
diff --git a/third_party/google-benchmark/cmake/Modules/FindLLVMAr.cmake b/third_party/google-benchmark/cmake/Modules/FindLLVMAr.cmake
deleted file mode 100644
index 2346981..0000000
--- a/third_party/google-benchmark/cmake/Modules/FindLLVMAr.cmake
+++ /dev/null
@@ -1,16 +0,0 @@
-include(FeatureSummary)
-
-find_program(LLVMAR_EXECUTABLE
-  NAMES llvm-ar
-  DOC "The llvm-ar executable"
-  )
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LLVMAr
-  DEFAULT_MSG
-  LLVMAR_EXECUTABLE)
-
-SET_PACKAGE_PROPERTIES(LLVMAr PROPERTIES
-  URL https://llvm.org/docs/CommandGuide/llvm-ar.html
-  DESCRIPTION "create, modify, and extract from archives"
-)
diff --git a/third_party/google-benchmark/cmake/Modules/FindLLVMNm.cmake b/third_party/google-benchmark/cmake/Modules/FindLLVMNm.cmake
deleted file mode 100644
index e56430a..0000000
--- a/third_party/google-benchmark/cmake/Modules/FindLLVMNm.cmake
+++ /dev/null
@@ -1,16 +0,0 @@
-include(FeatureSummary)
-
-find_program(LLVMNM_EXECUTABLE
-  NAMES llvm-nm
-  DOC "The llvm-nm executable"
-  )
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LLVMNm
-  DEFAULT_MSG
-  LLVMNM_EXECUTABLE)
-
-SET_PACKAGE_PROPERTIES(LLVMNm PROPERTIES
-  URL https://llvm.org/docs/CommandGuide/llvm-nm.html
-  DESCRIPTION "list LLVM bitcode and object file’s symbol table"
-)
diff --git a/third_party/google-benchmark/cmake/Modules/FindLLVMRanLib.cmake b/third_party/google-benchmark/cmake/Modules/FindLLVMRanLib.cmake
deleted file mode 100644
index 7b53e1a..0000000
--- a/third_party/google-benchmark/cmake/Modules/FindLLVMRanLib.cmake
+++ /dev/null
@@ -1,15 +0,0 @@
-include(FeatureSummary)
-
-find_program(LLVMRANLIB_EXECUTABLE
-  NAMES llvm-ranlib
-  DOC "The llvm-ranlib executable"
-  )
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LLVMRanLib
-  DEFAULT_MSG
-  LLVMRANLIB_EXECUTABLE)
-
-SET_PACKAGE_PROPERTIES(LLVMRanLib PROPERTIES
-  DESCRIPTION "generate index for LLVM archive"
-)
diff --git a/third_party/google-benchmark/cmake/benchmark.pc.in b/third_party/google-benchmark/cmake/benchmark.pc.in
deleted file mode 100644
index 1e84bff..0000000
--- a/third_party/google-benchmark/cmake/benchmark.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=${prefix}
-libdir=${prefix}/lib
-includedir=${prefix}/include
-
-Name: @PROJECT_NAME@
-Description: Google microbenchmark framework
-Version: @VERSION@
-
-Libs: -L${libdir} -lbenchmark
-Cflags: -I${includedir}
diff --git a/third_party/google-benchmark/cmake/gnu_posix_regex.cpp b/third_party/google-benchmark/cmake/gnu_posix_regex.cpp
deleted file mode 100644
index b5b91cd..0000000
--- a/third_party/google-benchmark/cmake/gnu_posix_regex.cpp
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <gnuregex.h>
-#include <string>
-int main() {
-  std::string str = "test0159";
-  regex_t re;
-  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    return ec;
-  }
-  return regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
-}
-
diff --git a/third_party/google-benchmark/cmake/llvm-toolchain.cmake b/third_party/google-benchmark/cmake/llvm-toolchain.cmake
deleted file mode 100644
index fc119e5..0000000
--- a/third_party/google-benchmark/cmake/llvm-toolchain.cmake
+++ /dev/null
@@ -1,8 +0,0 @@
-find_package(LLVMAr REQUIRED)
-set(CMAKE_AR "${LLVMAR_EXECUTABLE}" CACHE FILEPATH "" FORCE)
-
-find_package(LLVMNm REQUIRED)
-set(CMAKE_NM "${LLVMNM_EXECUTABLE}" CACHE FILEPATH "" FORCE)
-
-find_package(LLVMRanLib REQUIRED)
-set(CMAKE_RANLIB "${LLVMRANLIB_EXECUTABLE}" CACHE FILEPATH "" FORCE)
diff --git a/third_party/google-benchmark/cmake/posix_regex.cpp b/third_party/google-benchmark/cmake/posix_regex.cpp
deleted file mode 100644
index 466dc62..0000000
--- a/third_party/google-benchmark/cmake/posix_regex.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <regex.h>
-#include <string>
-int main() {
-  std::string str = "test0159";
-  regex_t re;
-  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    return ec;
-  }
-  int ret = regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
-  regfree(&re);
-  return ret;
-}
-
diff --git a/third_party/google-benchmark/cmake/split_list.cmake b/third_party/google-benchmark/cmake/split_list.cmake
deleted file mode 100644
index 67aed3f..0000000
--- a/third_party/google-benchmark/cmake/split_list.cmake
+++ /dev/null
@@ -1,3 +0,0 @@
-macro(split_list listname)
-  string(REPLACE ";" " " ${listname} "${${listname}}")
-endmacro()
diff --git a/third_party/google-benchmark/cmake/std_regex.cpp b/third_party/google-benchmark/cmake/std_regex.cpp
deleted file mode 100644
index 696f2a2..0000000
--- a/third_party/google-benchmark/cmake/std_regex.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-#include <regex>
-#include <string>
-int main() {
-  const std::string str = "test0159";
-  std::regex re;
-  re = std::regex("^[a-z]+[0-9]+$",
-       std::regex_constants::extended | std::regex_constants::nosubs);
-  return std::regex_search(str, re) ? 0 : -1;
-}
-
diff --git a/third_party/google-benchmark/cmake/steady_clock.cpp b/third_party/google-benchmark/cmake/steady_clock.cpp
deleted file mode 100644
index 66d50d1..0000000
--- a/third_party/google-benchmark/cmake/steady_clock.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <chrono>
-
-int main() {
-    typedef std::chrono::steady_clock Clock;
-    Clock::time_point tp = Clock::now();
-    ((void)tp);
-}
diff --git a/third_party/google-benchmark/cmake/thread_safety_attributes.cpp b/third_party/google-benchmark/cmake/thread_safety_attributes.cpp
deleted file mode 100644
index 46161ba..0000000
--- a/third_party/google-benchmark/cmake/thread_safety_attributes.cpp
+++ /dev/null
@@ -1,4 +0,0 @@
-#define HAVE_THREAD_SAFETY_ATTRIBUTES
-#include "../src/mutex.h"
-
-int main() {}
diff --git a/third_party/google-benchmark/conan/CMakeLists.txt b/third_party/google-benchmark/conan/CMakeLists.txt
deleted file mode 100644
index 15b92ca..0000000
--- a/third_party/google-benchmark/conan/CMakeLists.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-cmake_minimum_required(VERSION 2.8.11)
-project(cmake_wrapper)
-
-include(conanbuildinfo.cmake)
-conan_basic_setup()
-
-include(${CMAKE_SOURCE_DIR}/CMakeListsOriginal.txt)
diff --git a/third_party/google-benchmark/conan/test_package/CMakeLists.txt b/third_party/google-benchmark/conan/test_package/CMakeLists.txt
deleted file mode 100644
index 089a6c7..0000000
--- a/third_party/google-benchmark/conan/test_package/CMakeLists.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-cmake_minimum_required(VERSION 2.8.11)
-project(test_package)
-
-set(CMAKE_VERBOSE_MAKEFILE TRUE)
-
-include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
-conan_basic_setup()
-
-add_executable(${PROJECT_NAME} test_package.cpp)
-target_link_libraries(${PROJECT_NAME} ${CONAN_LIBS})
diff --git a/third_party/google-benchmark/conan/test_package/conanfile.py b/third_party/google-benchmark/conan/test_package/conanfile.py
deleted file mode 100644
index d63f408..0000000
--- a/third_party/google-benchmark/conan/test_package/conanfile.py
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-from conans import ConanFile, CMake
-import os
-
-
-class TestPackageConan(ConanFile):
-    settings = "os", "compiler", "build_type", "arch"
-    generators = "cmake"
-
-    def build(self):
-        cmake = CMake(self)
-        cmake.configure()
-        cmake.build()
-
-    def test(self):
-        bin_path = os.path.join("bin", "test_package")
-        self.run(bin_path, run_environment=True)
diff --git a/third_party/google-benchmark/conan/test_package/test_package.cpp b/third_party/google-benchmark/conan/test_package/test_package.cpp
deleted file mode 100644
index 4fa7ec0..0000000
--- a/third_party/google-benchmark/conan/test_package/test_package.cpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#include "benchmark/benchmark.h"
-
-void BM_StringCreation(benchmark::State& state) {
-    while (state.KeepRunning())
-        std::string empty_string;
-}
-
-BENCHMARK(BM_StringCreation);
-
-void BM_StringCopy(benchmark::State& state) {
-    std::string x = "hello";
-    while (state.KeepRunning())
-        std::string copy(x);
-}
-
-BENCHMARK(BM_StringCopy);
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/conanfile.py b/third_party/google-benchmark/conanfile.py
deleted file mode 100644
index e31fc52..0000000
--- a/third_party/google-benchmark/conanfile.py
+++ /dev/null
@@ -1,79 +0,0 @@
-from conans import ConanFile, CMake, tools
-from conans.errors import ConanInvalidConfiguration
-import shutil
-import os
-
-
-class GoogleBenchmarkConan(ConanFile):
-    name = "benchmark"
-    description = "A microbenchmark support library."
-    topics = ("conan", "benchmark", "google", "microbenchmark")
-    url = "https://github.com/google/benchmark"
-    homepage = "https://github.com/google/benchmark"
-    author = "Google Inc."
-    license = "Apache-2.0"
-    exports_sources = ["*"]
-    generators = "cmake"
-
-    settings = "arch", "build_type", "compiler", "os"
-    options = {
-        "shared": [True, False],
-        "fPIC": [True, False],
-        "enable_lto": [True, False],
-        "enable_exceptions": [True, False]
-    }
-    default_options = {"shared": False, "fPIC": True, "enable_lto": False, "enable_exceptions": True}
-
-    _build_subfolder = "."
-
-    def source(self):
-        # Wrap the original CMake file to call conan_basic_setup
-        shutil.move("CMakeLists.txt", "CMakeListsOriginal.txt")
-        shutil.move(os.path.join("conan", "CMakeLists.txt"), "CMakeLists.txt")
-
-    def config_options(self):
-        if self.settings.os == "Windows":
-            if self.settings.compiler == "Visual Studio" and float(self.settings.compiler.version.value) <= 12:
-                raise ConanInvalidConfiguration("{} {} does not support Visual Studio <= 12".format(self.name, self.version))
-            del self.options.fPIC
-
-    def configure(self):
-        if self.settings.os == "Windows" and self.options.shared:
-            raise ConanInvalidConfiguration("Windows shared builds are not supported right now, see issue #639")
-
-    def _configure_cmake(self):
-        cmake = CMake(self)
-
-        cmake.definitions["BENCHMARK_ENABLE_TESTING"] = "OFF"
-        cmake.definitions["BENCHMARK_ENABLE_GTEST_TESTS"] = "OFF"
-        cmake.definitions["BENCHMARK_ENABLE_LTO"] = "ON" if self.options.enable_lto else "OFF"
-        cmake.definitions["BENCHMARK_ENABLE_EXCEPTIONS"] = "ON" if self.options.enable_exceptions else "OFF"
-
-        # See https://github.com/google/benchmark/pull/638 for Windows 32 build explanation
-        if self.settings.os != "Windows":
-            cmake.definitions["BENCHMARK_BUILD_32_BITS"] = "ON" if "64" not in str(self.settings.arch) else "OFF"
-            cmake.definitions["BENCHMARK_USE_LIBCXX"] = "ON" if (str(self.settings.compiler.libcxx) == "libc++") else "OFF"
-        else:
-            cmake.definitions["BENCHMARK_USE_LIBCXX"] = "OFF"
-
-        cmake.configure(build_folder=self._build_subfolder)
-        return cmake
-
-    def build(self):
-        cmake = self._configure_cmake()
-        cmake.build()
-
-    def package(self):
-        cmake = self._configure_cmake()
-        cmake.install()
-
-        self.copy(pattern="LICENSE", dst="licenses")
-
-    def package_info(self):
-        self.cpp_info.libs = tools.collect_libs(self)
-        if self.settings.os == "Linux":
-            self.cpp_info.libs.extend(["pthread", "rt"])
-        elif self.settings.os == "Windows":
-            self.cpp_info.libs.append("shlwapi")
-        elif self.settings.os == "SunOS":
-            self.cpp_info.libs.append("kstat")
diff --git a/third_party/google-benchmark/docs/AssemblyTests.md b/third_party/google-benchmark/docs/AssemblyTests.md
deleted file mode 100644
index 1fbdc26..0000000
--- a/third_party/google-benchmark/docs/AssemblyTests.md
+++ /dev/null
@@ -1,147 +0,0 @@
-# Assembly Tests
-
-The Benchmark library provides a number of functions whose primary
-purpose in to affect assembly generation, including `DoNotOptimize`
-and `ClobberMemory`. In addition there are other functions,
-such as `KeepRunning`, for which generating good assembly is paramount.
-
-For these functions it's important to have tests that verify the
-correctness and quality of the implementation. This requires testing
-the code generated by the compiler.
-
-This document describes how the Benchmark library tests compiler output,
-as well as how to properly write new tests.
-
-
-## Anatomy of a Test
-
-Writing a test has two steps:
-
-* Write the code you want to generate assembly for.
-* Add `// CHECK` lines to match against the verified assembly.
-
-Example:
-```c++
-
-// CHECK-LABEL: test_add:
-extern "C" int test_add() {
-    extern int ExternInt;
-    return ExternInt + 1;
-
-    // CHECK: movl ExternInt(%rip), %eax
-    // CHECK: addl %eax
-    // CHECK: ret
-}
-
-```
-
-#### LLVM Filecheck
-
-[LLVM's Filecheck](https://llvm.org/docs/CommandGuide/FileCheck.html)
-is used to test the generated assembly against the `// CHECK` lines
-specified in the tests source file. Please see the documentation
-linked above for information on how to write `CHECK` directives.
-
-#### Tips and Tricks:
-
-* Tests should match the minimal amount of output required to establish
-correctness. `CHECK` directives don't have to match on the exact next line
-after the previous match, so tests should omit checks for unimportant
-bits of assembly. ([`CHECK-NEXT`](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-next-directive)
-can be used to ensure a match occurs exactly after the previous match).
-
-* The tests are compiled with `-O3 -g0`. So we're only testing the
-optimized output.
-
-* The assembly output is further cleaned up using `tools/strip_asm.py`.
-This removes comments, assembler directives, and unused labels before
-the test is run.
-
-* The generated and stripped assembly file for a test is output under
-`<build-directory>/test/<test-name>.s`
-
-* Filecheck supports using [`CHECK` prefixes](https://llvm.org/docs/CommandGuide/FileCheck.html#cmdoption-check-prefixes)
-to specify lines that should only match in certain situations.
-The Benchmark tests use `CHECK-CLANG` and `CHECK-GNU` for lines that
-are only expected to match Clang or GCC's output respectively. Normal
-`CHECK` lines match against all compilers. (Note: `CHECK-NOT` and
-`CHECK-LABEL` are NOT prefixes. They are versions of non-prefixed
-`CHECK` lines)
-
-* Use `extern "C"` to disable name mangling for specific functions. This
-makes them easier to name in the `CHECK` lines.
-
-
-## Problems Writing Portable Tests
-
-Writing tests which check the code generated by a compiler are
-inherently non-portable. Different compilers and even different compiler
-versions may generate entirely different code. The Benchmark tests
-must tolerate this.
-
-LLVM Filecheck provides a number of mechanisms to help write
-"more portable" tests; including [matching using regular expressions](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-pattern-matching-syntax),
-allowing the creation of [named variables](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-variables)
-for later matching, and [checking non-sequential matches](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-dag-directive).
-
-#### Capturing Variables
-
-For example, say GCC stores a variable in a register but Clang stores
-it in memory. To write a test that tolerates both cases we "capture"
-the destination of the store, and then use the captured expression
-to write the remainder of the test.
-
-```c++
-// CHECK-LABEL: test_div_no_op_into_shr:
-extern "C" void test_div_no_op_into_shr(int value) {
-    int divisor = 2;
-    benchmark::DoNotOptimize(divisor); // hide the value from the optimizer
-    return value / divisor;
-
-    // CHECK: movl $2, [[DEST:.*]]
-    // CHECK: idivl [[DEST]]
-    // CHECK: ret
-}
-```
-
-#### Using Regular Expressions to Match Differing Output
-
-Often tests require testing assembly lines which may subtly differ
-between compilers or compiler versions. A common example of this
-is matching stack frame addresses. In this case regular expressions
-can be used to match the differing bits of output. For example:
-
-```c++
-int ExternInt;
-struct Point { int x, y, z; };
-
-// CHECK-LABEL: test_store_point:
-extern "C" void test_store_point() {
-    Point p{ExternInt, ExternInt, ExternInt};
-    benchmark::DoNotOptimize(p);
-
-    // CHECK: movl ExternInt(%rip), %eax
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: ret
-}
-```
-
-## Current Requirements and Limitations
-
-The tests require Filecheck to be installed along the `PATH` of the
-build machine. Otherwise the tests will be disabled.
-
-Additionally, as mentioned in the previous section, codegen tests are
-inherently non-portable. Currently the tests are limited to:
-
-* x86_64 targets.
-* Compiled with GCC or Clang
-
-Further work could be done, at least on a limited basis, to extend the
-tests to other architectures and compilers (using `CHECK` prefixes).
-
-Furthermore, the tests fail for builds which specify additional flags
-that modify code generation, including `--coverage` or `-fsanitize=`.
-
diff --git a/third_party/google-benchmark/docs/tools.md b/third_party/google-benchmark/docs/tools.md
deleted file mode 100644
index 4a3b2e9..0000000
--- a/third_party/google-benchmark/docs/tools.md
+++ /dev/null
@@ -1,199 +0,0 @@
-# Benchmark Tools
-
-## compare.py
-
-The `compare.py` can be used to compare the result of benchmarks.
-
-**NOTE**: the utility relies on the scipy package which can be installed using [these instructions](https://www.scipy.org/install.html).
-
-### Displaying aggregates only
-
-The switch `-a` / `--display_aggregates_only` can be used to control the
-displayment of the normal iterations vs the aggregates. When passed, it will
-be passthrough to the benchmark binaries to be run, and will be accounted for
-in the tool itself; only the aggregates will be displayed, but not normal runs.
-It only affects the display, the separate runs will still be used to calculate
-the U test.
-
-### Modes of operation
-
-There are three modes of operation:
-
-1. Just compare two benchmarks
-The program is invoked like:
-
-``` bash
-$ compare.py benchmarks <benchmark_baseline> <benchmark_contender> [benchmark options]...
-```
-Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py benchmarks ./a.out ./a.out
-RUNNING: ./a.out --benchmark_out=/tmp/tmprBT5nW
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:16:44
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   19101577   211.669MB/s
-BM_memcpy/64           76 ns         76 ns    9412571   800.199MB/s
-BM_memcpy/512          84 ns         84 ns    8249070   5.64771GB/s
-BM_memcpy/1024        116 ns        116 ns    6181763   8.19505GB/s
-BM_memcpy/8192        643 ns        643 ns    1062855   11.8636GB/s
-BM_copy/8             222 ns        222 ns    3137987   34.3772MB/s
-BM_copy/64           1608 ns       1608 ns     432758   37.9501MB/s
-BM_copy/512         12589 ns      12589 ns      54806   38.7867MB/s
-BM_copy/1024        25169 ns      25169 ns      27713   38.8003MB/s
-BM_copy/8192       201165 ns     201112 ns       3486   38.8466MB/s
-RUNNING: ./a.out --benchmark_out=/tmp/tmpt1wwG_
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:16:53
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   19397903   211.255MB/s
-BM_memcpy/64           73 ns         73 ns    9691174   839.635MB/s
-BM_memcpy/512          85 ns         85 ns    8312329   5.60101GB/s
-BM_memcpy/1024        118 ns        118 ns    6438774   8.11608GB/s
-BM_memcpy/8192        656 ns        656 ns    1068644   11.6277GB/s
-BM_copy/8             223 ns        223 ns    3146977   34.2338MB/s
-BM_copy/64           1611 ns       1611 ns     435340   37.8751MB/s
-BM_copy/512         12622 ns      12622 ns      54818   38.6844MB/s
-BM_copy/1024        25257 ns      25239 ns      27779   38.6927MB/s
-BM_copy/8192       205013 ns     205010 ns       3479    38.108MB/s
-Comparing ./a.out to ./a.out
-Benchmark                 Time             CPU      Time Old      Time New       CPU Old       CPU New
-------------------------------------------------------------------------------------------------------
-BM_memcpy/8            +0.0020         +0.0020            36            36            36            36
-BM_memcpy/64           -0.0468         -0.0470            76            73            76            73
-BM_memcpy/512          +0.0081         +0.0083            84            85            84            85
-BM_memcpy/1024         +0.0098         +0.0097           116           118           116           118
-BM_memcpy/8192         +0.0200         +0.0203           643           656           643           656
-BM_copy/8              +0.0046         +0.0042           222           223           222           223
-BM_copy/64             +0.0020         +0.0020          1608          1611          1608          1611
-BM_copy/512            +0.0027         +0.0026         12589         12622         12589         12622
-BM_copy/1024           +0.0035         +0.0028         25169         25257         25169         25239
-BM_copy/8192           +0.0191         +0.0194        201165        205013        201112        205010
-```
-
-What it does is for the every benchmark from the first run it looks for the benchmark with exactly the same name in the second run, and then compares the results. If the names differ, the benchmark is omitted from the diff.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-2. Compare two different filters of one benchmark
-The program is invoked like:
-
-``` bash
-$ compare.py filters <benchmark> <filter_baseline> <filter_contender> [benchmark options]...
-```
-Where `<benchmark>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py filters ./a.out BM_memcpy BM_copy
-RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmpBWKk0k
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:37:28
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   17891491   211.215MB/s
-BM_memcpy/64           74 ns         74 ns    9400999   825.646MB/s
-BM_memcpy/512          87 ns         87 ns    8027453   5.46126GB/s
-BM_memcpy/1024        111 ns        111 ns    6116853    8.5648GB/s
-BM_memcpy/8192        657 ns        656 ns    1064679   11.6247GB/s
-RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpAvWcOM
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:37:33
-----------------------------------------------------
-Benchmark             Time           CPU Iterations
-----------------------------------------------------
-BM_copy/8           227 ns        227 ns    3038700   33.6264MB/s
-BM_copy/64         1640 ns       1640 ns     426893   37.2154MB/s
-BM_copy/512       12804 ns      12801 ns      55417   38.1444MB/s
-BM_copy/1024      25409 ns      25407 ns      27516   38.4365MB/s
-BM_copy/8192     202986 ns     202990 ns       3454   38.4871MB/s
-Comparing BM_memcpy to BM_copy (from ./a.out)
-Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
---------------------------------------------------------------------------------------------------------------------
-[BM_memcpy vs. BM_copy]/8            +5.2829         +5.2812            36           227            36           227
-[BM_memcpy vs. BM_copy]/64          +21.1719        +21.1856            74          1640            74          1640
-[BM_memcpy vs. BM_copy]/512        +145.6487       +145.6097            87         12804            87         12801
-[BM_memcpy vs. BM_copy]/1024       +227.1860       +227.1776           111         25409           111         25407
-[BM_memcpy vs. BM_copy]/8192       +308.1664       +308.2898           657        202986           656        202990
-```
-
-As you can see, it applies filter to the benchmarks, both when running the benchmark, and before doing the diff. And to make the diff work, the matches are replaced with some common string. Thus, you can compare two different benchmark families within one benchmark binary.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-3. Compare filter one from benchmark one to filter two from benchmark two:
-The program is invoked like:
-
-``` bash
-$ compare.py filters <benchmark_baseline> <filter_baseline> <benchmark_contender> <filter_contender> [benchmark options]...
-```
-
-Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py benchmarksfiltered ./a.out BM_memcpy ./a.out BM_copy
-RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmp_FvbYg
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:38:27
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            37 ns         37 ns   18953482   204.118MB/s
-BM_memcpy/64           74 ns         74 ns    9206578   828.245MB/s
-BM_memcpy/512          91 ns         91 ns    8086195   5.25476GB/s
-BM_memcpy/1024        120 ns        120 ns    5804513   7.95662GB/s
-BM_memcpy/8192        664 ns        664 ns    1028363   11.4948GB/s
-RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpDfL5iE
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:38:32
-----------------------------------------------------
-Benchmark             Time           CPU Iterations
-----------------------------------------------------
-BM_copy/8           230 ns        230 ns    2985909   33.1161MB/s
-BM_copy/64         1654 ns       1653 ns     419408   36.9137MB/s
-BM_copy/512       13122 ns      13120 ns      53403   37.2156MB/s
-BM_copy/1024      26679 ns      26666 ns      26575   36.6218MB/s
-BM_copy/8192     215068 ns     215053 ns       3221   36.3283MB/s
-Comparing BM_memcpy (from ./a.out) to BM_copy (from ./a.out)
-Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
---------------------------------------------------------------------------------------------------------------------
-[BM_memcpy vs. BM_copy]/8            +5.1649         +5.1637            37           230            37           230
-[BM_memcpy vs. BM_copy]/64          +21.4352        +21.4374            74          1654            74          1653
-[BM_memcpy vs. BM_copy]/512        +143.6022       +143.5865            91         13122            91         13120
-[BM_memcpy vs. BM_copy]/1024       +221.5903       +221.4790           120         26679           120         26666
-[BM_memcpy vs. BM_copy]/8192       +322.9059       +323.0096           664        215068           664        215053
-```
-This is a mix of the previous two modes, two (potentially different) benchmark binaries are run, and a different filter is applied to each one.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-### U test
-
-If there is a sufficient repetition count of the benchmarks, the tool can do
-a [U Test](https://en.wikipedia.org/wiki/Mann%E2%80%93Whitney_U_test), of the
-null hypothesis that it is equally likely that a randomly selected value from
-one sample will be less than or greater than a randomly selected value from a
-second sample.
-
-If the calculated p-value is below this value is lower than the significance
-level alpha, then the result is said to be statistically significant and the
-null hypothesis is rejected. Which in other words means that the two benchmarks
-aren't identical.
-
-**WARNING**: requires **LARGE** (no less than 9) number of repetitions to be
-meaningful!
diff --git a/third_party/google-benchmark/include/benchmark/benchmark.h b/third_party/google-benchmark/include/benchmark/benchmark.h
deleted file mode 100644
index e4f3921..0000000
--- a/third_party/google-benchmark/include/benchmark/benchmark.h
+++ /dev/null
@@ -1,1551 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Support for registering benchmarks for functions.
-
-/* Example usage:
-// Define a function that executes the code to be measured a
-// specified number of times:
-static void BM_StringCreation(benchmark::State& state) {
-  for (auto _ : state)
-    std::string empty_string;
-}
-
-// Register the function as a benchmark
-BENCHMARK(BM_StringCreation);
-
-// Define another benchmark
-static void BM_StringCopy(benchmark::State& state) {
-  std::string x = "hello";
-  for (auto _ : state)
-    std::string copy(x);
-}
-BENCHMARK(BM_StringCopy);
-
-// Augment the main() program to invoke benchmarks if specified
-// via the --benchmarks command line flag.  E.g.,
-//       my_unittest --benchmark_filter=all
-//       my_unittest --benchmark_filter=BM_StringCreation
-//       my_unittest --benchmark_filter=String
-//       my_unittest --benchmark_filter='Copy|Creation'
-int main(int argc, char** argv) {
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-  return 0;
-}
-
-// Sometimes a family of microbenchmarks can be implemented with
-// just one routine that takes an extra argument to specify which
-// one of the family of benchmarks to run.  For example, the following
-// code defines a family of microbenchmarks for measuring the speed
-// of memcpy() calls of different lengths:
-
-static void BM_memcpy(benchmark::State& state) {
-  char* src = new char[state.range(0)]; char* dst = new char[state.range(0)];
-  memset(src, 'x', state.range(0));
-  for (auto _ : state)
-    memcpy(dst, src, state.range(0));
-  state.SetBytesProcessed(int64_t(state.iterations()) *
-                          int64_t(state.range(0)));
-  delete[] src; delete[] dst;
-}
-BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
-
-// The preceding code is quite repetitive, and can be replaced with the
-// following short-hand.  The following invocation will pick a few
-// appropriate arguments in the specified range and will generate a
-// microbenchmark for each such argument.
-BENCHMARK(BM_memcpy)->Range(8, 8<<10);
-
-// You might have a microbenchmark that depends on two inputs.  For
-// example, the following code defines a family of microbenchmarks for
-// measuring the speed of set insertion.
-static void BM_SetInsert(benchmark::State& state) {
-  set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert)
-   ->Args({1<<10, 128})
-   ->Args({2<<10, 128})
-   ->Args({4<<10, 128})
-   ->Args({8<<10, 128})
-   ->Args({1<<10, 512})
-   ->Args({2<<10, 512})
-   ->Args({4<<10, 512})
-   ->Args({8<<10, 512});
-
-// The preceding code is quite repetitive, and can be replaced with
-// the following short-hand.  The following macro will pick a few
-// appropriate arguments in the product of the two specified ranges
-// and will generate a microbenchmark for each such pair.
-BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
-
-// For more complex patterns of inputs, passing a custom function
-// to Apply allows programmatic specification of an
-// arbitrary set of arguments to run the microbenchmark on.
-// The following example enumerates a dense range on
-// one parameter, and a sparse range on the second.
-static void CustomArguments(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i <= 10; ++i)
-    for (int j = 32; j <= 1024*1024; j *= 8)
-      b->Args({i, j});
-}
-BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
-
-// Templated microbenchmarks work the same way:
-// Produce then consume 'size' messages 'iters' times
-// Measures throughput in the absence of multiprogramming.
-template <class Q> int BM_Sequential(benchmark::State& state) {
-  Q q;
-  typename Q::value_type v;
-  for (auto _ : state) {
-    for (int i = state.range(0); i--; )
-      q.push(v);
-    for (int e = state.range(0); e--; )
-      q.Wait(&v);
-  }
-  // actually messages, not bytes:
-  state.SetBytesProcessed(
-      static_cast<int64_t>(state.iterations())*state.range(0));
-}
-BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
-
-Use `Benchmark::MinTime(double t)` to set the minimum time used to run the
-benchmark. This option overrides the `benchmark_min_time` flag.
-
-void BM_test(benchmark::State& state) {
- ... body ...
-}
-BENCHMARK(BM_test)->MinTime(2.0); // Run for at least 2 seconds.
-
-In a multithreaded test, it is guaranteed that none of the threads will start
-until all have reached the loop start, and all will have finished before any
-thread exits the loop body. As such, any global setup or teardown you want to
-do can be wrapped in a check against the thread index:
-
-static void BM_MultiThreaded(benchmark::State& state) {
-  if (state.thread_index == 0) {
-    // Setup code here.
-  }
-  for (auto _ : state) {
-    // Run the test as normal.
-  }
-  if (state.thread_index == 0) {
-    // Teardown code here.
-  }
-}
-BENCHMARK(BM_MultiThreaded)->Threads(4);
-
-
-If a benchmark runs a few milliseconds it may be hard to visually compare the
-measured times, since the output data is given in nanoseconds per default. In
-order to manually set the time unit, you can specify it manually:
-
-BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
-*/
-
-#ifndef BENCHMARK_BENCHMARK_H_
-#define BENCHMARK_BENCHMARK_H_
-
-// The _MSVC_LANG check should detect Visual Studio 2015 Update 3 and newer.
-#if __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
-#define BENCHMARK_HAS_CXX11
-#endif
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <iosfwd>
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#if defined(BENCHMARK_HAS_CXX11)
-#include <initializer_list>
-#include <type_traits>
-#include <utility>
-#endif
-
-#if defined(_MSC_VER)
-#include <intrin.h>  // for _ReadWriteBarrier
-#endif
-
-#ifndef BENCHMARK_HAS_CXX11
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&);                         \
-  TypeName& operator=(const TypeName&)
-#else
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&) = delete;                \
-  TypeName& operator=(const TypeName&) = delete
-#endif
-
-#if defined(__GNUC__)
-#define BENCHMARK_UNUSED __attribute__((unused))
-#define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#elif defined(_MSC_VER) && !defined(__clang__)
-#define BENCHMARK_UNUSED
-#define BENCHMARK_ALWAYS_INLINE __forceinline
-#if _MSC_VER >= 1900
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#else
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-#define __func__ __FUNCTION__
-#else
-#define BENCHMARK_UNUSED
-#define BENCHMARK_ALWAYS_INLINE
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-
-#define BENCHMARK_INTERNAL_TOSTRING2(x) #x
-#define BENCHMARK_INTERNAL_TOSTRING(x) BENCHMARK_INTERNAL_TOSTRING2(x)
-
-#if defined(__GNUC__) || defined(__clang__)
-#define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
-#define BENCHMARK_DEPRECATED_MSG(msg) __attribute__((deprecated(msg)))
-#else
-#define BENCHMARK_BUILTIN_EXPECT(x, y) x
-#define BENCHMARK_DEPRECATED_MSG(msg)
-#define BENCHMARK_WARNING_MSG(msg)                           \
-  __pragma(message(__FILE__ "(" BENCHMARK_INTERNAL_TOSTRING( \
-      __LINE__) ") : warning note: " msg))
-#endif
-
-#if defined(__GNUC__) && !defined(__clang__)
-#define BENCHMARK_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#endif
-
-#ifndef __has_builtin
-#define __has_builtin(x) 0
-#endif
-
-#if defined(__GNUC__) || __has_builtin(__builtin_unreachable)
-  #define BENCHMARK_UNREACHABLE() __builtin_unreachable()
-#elif defined(_MSC_VER)
-  #define BENCHMARK_UNREACHABLE() __assume(false)
-#else
-  #define BENCHMARK_UNREACHABLE() ((void)0)
-#endif
-
-namespace benchmark {
-class BenchmarkReporter;
-class MemoryManager;
-
-void Initialize(int* argc, char** argv);
-
-// Report to stdout all arguments in 'argv' as unrecognized except the first.
-// Returns true there is at least on unrecognized argument (i.e. 'argc' > 1).
-bool ReportUnrecognizedArguments(int argc, char** argv);
-
-// Generate a list of benchmarks matching the specified --benchmark_filter flag
-// and if --benchmark_list_tests is specified return after printing the name
-// of each matching benchmark. Otherwise run each matching benchmark and
-// report the results.
-//
-// The second and third overload use the specified 'display_reporter' and
-//  'file_reporter' respectively. 'file_reporter' will write to the file
-//  specified
-//   by '--benchmark_output'. If '--benchmark_output' is not given the
-//  'file_reporter' is ignored.
-//
-// RETURNS: The number of matching benchmarks.
-size_t RunSpecifiedBenchmarks();
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter);
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter);
-
-// Register a MemoryManager instance that will be used to collect and report
-// allocation measurements for benchmark runs.
-void RegisterMemoryManager(MemoryManager* memory_manager);
-
-namespace internal {
-class Benchmark;
-class BenchmarkImp;
-class BenchmarkFamilies;
-
-void UseCharPointer(char const volatile*);
-
-// Take ownership of the pointer and register the benchmark. Return the
-// registered benchmark.
-Benchmark* RegisterBenchmarkInternal(Benchmark*);
-
-// Ensure that the standard streams are properly initialized in every TU.
-int InitializeStreams();
-BENCHMARK_UNUSED static int stream_init_anchor = InitializeStreams();
-
-}  // namespace internal
-
-#if (!defined(__GNUC__) && !defined(__clang__)) || defined(__pnacl__) || \
-    defined(__EMSCRIPTEN__)
-#define BENCHMARK_HAS_NO_INLINE_ASSEMBLY
-#endif
-
-// The DoNotOptimize(...) function can be used to prevent a value or
-// expression from being optimized away by the compiler. This function is
-// intended to add little to no overhead.
-// See: https://youtu.be/nXaxk27zwlk?t=2441
-#ifndef BENCHMARK_HAS_NO_INLINE_ASSEMBLY
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  asm volatile("" : : "r,m"(value) : "memory");
-}
-
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp& value) {
-#if defined(__clang__)
-  asm volatile("" : "+r,m"(value) : : "memory");
-#else
-  asm volatile("" : "+m,r"(value) : : "memory");
-#endif
-}
-
-// Force the compiler to flush pending writes to global memory. Acts as an
-// effective read/write barrier
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() {
-  asm volatile("" : : : "memory");
-}
-#elif defined(_MSC_VER)
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
-  _ReadWriteBarrier();
-}
-
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() { _ReadWriteBarrier(); }
-#else
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
-}
-// FIXME Add ClobberMemory() for non-gnu and non-msvc compilers
-#endif
-
-// This class is used for user-defined counters.
-class Counter {
- public:
-  enum Flags {
-    kDefaults = 0,
-    // Mark the counter as a rate. It will be presented divided
-    // by the duration of the benchmark.
-    kIsRate = 1U << 0U,
-    // Mark the counter as a thread-average quantity. It will be
-    // presented divided by the number of threads.
-    kAvgThreads = 1U << 1U,
-    // Mark the counter as a thread-average rate. See above.
-    kAvgThreadsRate = kIsRate | kAvgThreads,
-    // Mark the counter as a constant value, valid/same for *every* iteration.
-    // When reporting, it will be *multiplied* by the iteration count.
-    kIsIterationInvariant = 1U << 2U,
-    // Mark the counter as a constant rate.
-    // When reporting, it will be *multiplied* by the iteration count
-    // and then divided by the duration of the benchmark.
-    kIsIterationInvariantRate = kIsRate | kIsIterationInvariant,
-    // Mark the counter as a iteration-average quantity.
-    // It will be presented divided by the number of iterations.
-    kAvgIterations = 1U << 3U,
-    // Mark the counter as a iteration-average rate. See above.
-    kAvgIterationsRate = kIsRate | kAvgIterations
-  };
-
-  enum OneK {
-    // 1'000 items per 1k
-    kIs1000 = 1000,
-    // 1'024 items per 1k
-    kIs1024 = 1024
-  };
-
-  double value;
-  Flags flags;
-  OneK oneK;
-
-  BENCHMARK_ALWAYS_INLINE
-  Counter(double v = 0., Flags f = kDefaults, OneK k = kIs1000)
-      : value(v), flags(f), oneK(k) {}
-
-  BENCHMARK_ALWAYS_INLINE operator double const&() const { return value; }
-  BENCHMARK_ALWAYS_INLINE operator double&() { return value; }
-};
-
-// A helper for user code to create unforeseen combinations of Flags, without
-// having to do this cast manually each time, or providing this operator.
-Counter::Flags inline operator|(const Counter::Flags& LHS,
-                                const Counter::Flags& RHS) {
-  return static_cast<Counter::Flags>(static_cast<int>(LHS) |
-                                     static_cast<int>(RHS));
-}
-
-// This is the container for the user-defined counters.
-typedef std::map<std::string, Counter> UserCounters;
-
-// TimeUnit is passed to a benchmark in order to specify the order of magnitude
-// for the measured time.
-enum TimeUnit { kNanosecond, kMicrosecond, kMillisecond };
-
-// BigO is passed to a benchmark in order to specify the asymptotic
-// computational
-// complexity for the benchmark. In case oAuto is selected, complexity will be
-// calculated automatically to the best fit.
-enum BigO { oNone, o1, oN, oNSquared, oNCubed, oLogN, oNLogN, oAuto, oLambda };
-
-// BigOFunc is passed to a benchmark in order to specify the asymptotic
-// computational complexity for the benchmark.
-typedef double(BigOFunc)(int64_t);
-
-// StatisticsFunc is passed to a benchmark in order to compute some descriptive
-// statistics over all the measurements of some type
-typedef double(StatisticsFunc)(const std::vector<double>&);
-
-namespace internal {
-struct Statistics {
-  std::string name_;
-  StatisticsFunc* compute_;
-
-  Statistics(const std::string& name, StatisticsFunc* compute)
-      : name_(name), compute_(compute) {}
-};
-
-struct BenchmarkInstance;
-class ThreadTimer;
-class ThreadManager;
-
-enum AggregationReportMode
-#if defined(BENCHMARK_HAS_CXX11)
-    : unsigned
-#else
-#endif
-{
-  // The mode has not been manually specified
-  ARM_Unspecified = 0,
-  // The mode is user-specified.
-  // This may or may not be set when the following bit-flags are set.
-  ARM_Default = 1U << 0U,
-  // File reporter should only output aggregates.
-  ARM_FileReportAggregatesOnly = 1U << 1U,
-  // Display reporter should only output aggregates
-  ARM_DisplayReportAggregatesOnly = 1U << 2U,
-  // Both reporters should only display aggregates.
-  ARM_ReportAggregatesOnly =
-      ARM_FileReportAggregatesOnly | ARM_DisplayReportAggregatesOnly
-};
-
-}  // namespace internal
-
-// State is passed to a running Benchmark and contains state for the
-// benchmark to use.
-class State {
- public:
-  struct StateIterator;
-  friend struct StateIterator;
-
-  // Returns iterators used to run each iteration of a benchmark using a
-  // C++11 ranged-based for loop. These functions should not be called directly.
-  //
-  // REQUIRES: The benchmark has not started running yet. Neither begin nor end
-  // have been called previously.
-  //
-  // NOTE: KeepRunning may not be used after calling either of these functions.
-  BENCHMARK_ALWAYS_INLINE StateIterator begin();
-  BENCHMARK_ALWAYS_INLINE StateIterator end();
-
-  // Returns true if the benchmark should continue through another iteration.
-  // NOTE: A benchmark may not return from the test until KeepRunning() has
-  // returned false.
-  bool KeepRunning();
-
-  // Returns true iff the benchmark should run n more iterations.
-  // REQUIRES: 'n' > 0.
-  // NOTE: A benchmark must not return from the test until KeepRunningBatch()
-  // has returned false.
-  // NOTE: KeepRunningBatch() may overshoot by up to 'n' iterations.
-  //
-  // Intended usage:
-  //   while (state.KeepRunningBatch(1000)) {
-  //     // process 1000 elements
-  //   }
-  bool KeepRunningBatch(size_t n);
-
-  // REQUIRES: timer is running and 'SkipWithError(...)' has not been called
-  //           by the current thread.
-  // Stop the benchmark timer.  If not called, the timer will be
-  // automatically stopped after the last iteration of the benchmark loop.
-  //
-  // For threaded benchmarks the PauseTiming() function only pauses the timing
-  // for the current thread.
-  //
-  // NOTE: The "real time" measurement is per-thread. If different threads
-  // report different measurements the largest one is reported.
-  //
-  // NOTE: PauseTiming()/ResumeTiming() are relatively
-  // heavyweight, and so their use should generally be avoided
-  // within each benchmark iteration, if possible.
-  void PauseTiming();
-
-  // REQUIRES: timer is not running and 'SkipWithError(...)' has not been called
-  //           by the current thread.
-  // Start the benchmark timer.  The timer is NOT running on entrance to the
-  // benchmark function. It begins running after control flow enters the
-  // benchmark loop.
-  //
-  // NOTE: PauseTiming()/ResumeTiming() are relatively
-  // heavyweight, and so their use should generally be avoided
-  // within each benchmark iteration, if possible.
-  void ResumeTiming();
-
-  // REQUIRES: 'SkipWithError(...)' has not been called previously by the
-  //            current thread.
-  // Report the benchmark as resulting in an error with the specified 'msg'.
-  // After this call the user may explicitly 'return' from the benchmark.
-  //
-  // If the ranged-for style of benchmark loop is used, the user must explicitly
-  // break from the loop, otherwise all future iterations will be run.
-  // If the 'KeepRunning()' loop is used the current thread will automatically
-  // exit the loop at the end of the current iteration.
-  //
-  // For threaded benchmarks only the current thread stops executing and future
-  // calls to `KeepRunning()` will block until all threads have completed
-  // the `KeepRunning()` loop. If multiple threads report an error only the
-  // first error message is used.
-  //
-  // NOTE: Calling 'SkipWithError(...)' does not cause the benchmark to exit
-  // the current scope immediately. If the function is called from within
-  // the 'KeepRunning()' loop the current iteration will finish. It is the users
-  // responsibility to exit the scope as needed.
-  void SkipWithError(const char* msg);
-
-  // REQUIRES: called exactly once per iteration of the benchmarking loop.
-  // Set the manually measured time for this benchmark iteration, which
-  // is used instead of automatically measured time if UseManualTime() was
-  // specified.
-  //
-  // For threaded benchmarks the final value will be set to the largest
-  // reported values.
-  void SetIterationTime(double seconds);
-
-  // Set the number of bytes processed by the current benchmark
-  // execution.  This routine is typically called once at the end of a
-  // throughput oriented benchmark.
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  BENCHMARK_ALWAYS_INLINE
-  void SetBytesProcessed(int64_t bytes) {
-    counters["bytes_per_second"] =
-        Counter(static_cast<double>(bytes), Counter::kIsRate, Counter::kIs1024);
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t bytes_processed() const {
-    if (counters.find("bytes_per_second") != counters.end())
-      return static_cast<int64_t>(counters.at("bytes_per_second"));
-    return 0;
-  }
-
-  // If this routine is called with complexity_n > 0 and complexity report is
-  // requested for the
-  // family benchmark, then current benchmark will be part of the computation
-  // and complexity_n will
-  // represent the length of N.
-  BENCHMARK_ALWAYS_INLINE
-  void SetComplexityN(int64_t complexity_n) { complexity_n_ = complexity_n; }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t complexity_length_n() { return complexity_n_; }
-
-  // If this routine is called with items > 0, then an items/s
-  // label is printed on the benchmark report line for the currently
-  // executing benchmark. It is typically called at the end of a processing
-  // benchmark where a processing items/second output is desired.
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  BENCHMARK_ALWAYS_INLINE
-  void SetItemsProcessed(int64_t items) {
-    counters["items_per_second"] =
-        Counter(static_cast<double>(items), benchmark::Counter::kIsRate);
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t items_processed() const {
-    if (counters.find("items_per_second") != counters.end())
-      return static_cast<int64_t>(counters.at("items_per_second"));
-    return 0;
-  }
-
-  // If this routine is called, the specified label is printed at the
-  // end of the benchmark report line for the currently executing
-  // benchmark.  Example:
-  //  static void BM_Compress(benchmark::State& state) {
-  //    ...
-  //    double compress = input_size / output_size;
-  //    state.SetLabel(StrFormat("compress:%.1f%%", 100.0*compression));
-  //  }
-  // Produces output that looks like:
-  //  BM_Compress   50         50   14115038  compress:27.3%
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  void SetLabel(const char* label);
-
-  void BENCHMARK_ALWAYS_INLINE SetLabel(const std::string& str) {
-    this->SetLabel(str.c_str());
-  }
-
-  // Range arguments for this run. CHECKs if the argument has been set.
-  BENCHMARK_ALWAYS_INLINE
-  int64_t range(std::size_t pos = 0) const {
-    assert(range_.size() > pos);
-    return range_[pos];
-  }
-
-  BENCHMARK_DEPRECATED_MSG("use 'range(0)' instead")
-  int64_t range_x() const { return range(0); }
-
-  BENCHMARK_DEPRECATED_MSG("use 'range(1)' instead")
-  int64_t range_y() const { return range(1); }
-
-  BENCHMARK_ALWAYS_INLINE
-  size_t iterations() const {
-    if (BENCHMARK_BUILTIN_EXPECT(!started_, false)) {
-      return 0;
-    }
-    return max_iterations - total_iterations_ + batch_leftover_;
-  }
-
- private
-     :  // items we expect on the first cache line (ie 64 bytes of the struct)
-  // When total_iterations_ is 0, KeepRunning() and friends will return false.
-  // May be larger than max_iterations.
-  size_t total_iterations_;
-
-  // When using KeepRunningBatch(), batch_leftover_ holds the number of
-  // iterations beyond max_iters that were run. Used to track
-  // completed_iterations_ accurately.
-  size_t batch_leftover_;
-
- public:
-  const size_t max_iterations;
-
- private:
-  bool started_;
-  bool finished_;
-  bool error_occurred_;
-
- private:  // items we don't need on the first cache line
-  std::vector<int64_t> range_;
-
-  int64_t complexity_n_;
-
- public:
-  // Container for user-defined counters.
-  UserCounters counters;
-  // Index of the executing thread. Values from [0, threads).
-  const int thread_index;
-  // Number of threads concurrently executing the benchmark.
-  const int threads;
-
- private:
-  State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
-        int n_threads, internal::ThreadTimer* timer,
-        internal::ThreadManager* manager);
-
-  void StartKeepRunning();
-  // Implementation of KeepRunning() and KeepRunningBatch().
-  // is_batch must be true unless n is 1.
-  bool KeepRunningInternal(size_t n, bool is_batch);
-  void FinishKeepRunning();
-  internal::ThreadTimer* timer_;
-  internal::ThreadManager* manager_;
-
-  friend struct internal::BenchmarkInstance;
-};
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunning() {
-  return KeepRunningInternal(1, /*is_batch=*/false);
-}
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningBatch(size_t n) {
-  return KeepRunningInternal(n, /*is_batch=*/true);
-}
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningInternal(size_t n,
-                                                               bool is_batch) {
-  // total_iterations_ is set to 0 by the constructor, and always set to a
-  // nonzero value by StartKepRunning().
-  assert(n > 0);
-  // n must be 1 unless is_batch is true.
-  assert(is_batch || n == 1);
-  if (BENCHMARK_BUILTIN_EXPECT(total_iterations_ >= n, true)) {
-    total_iterations_ -= n;
-    return true;
-  }
-  if (!started_) {
-    StartKeepRunning();
-    if (!error_occurred_ && total_iterations_ >= n) {
-      total_iterations_ -= n;
-      return true;
-    }
-  }
-  // For non-batch runs, total_iterations_ must be 0 by now.
-  if (is_batch && total_iterations_ != 0) {
-    batch_leftover_ = n - total_iterations_;
-    total_iterations_ = 0;
-    return true;
-  }
-  FinishKeepRunning();
-  return false;
-}
-
-struct State::StateIterator {
-  struct BENCHMARK_UNUSED Value {};
-  typedef std::forward_iterator_tag iterator_category;
-  typedef Value value_type;
-  typedef Value reference;
-  typedef Value pointer;
-  typedef std::ptrdiff_t difference_type;
-
- private:
-  friend class State;
-  BENCHMARK_ALWAYS_INLINE
-  StateIterator() : cached_(0), parent_() {}
-
-  BENCHMARK_ALWAYS_INLINE
-  explicit StateIterator(State* st)
-      : cached_(st->error_occurred_ ? 0 : st->max_iterations), parent_(st) {}
-
- public:
-  BENCHMARK_ALWAYS_INLINE
-  Value operator*() const { return Value(); }
-
-  BENCHMARK_ALWAYS_INLINE
-  StateIterator& operator++() {
-    assert(cached_ > 0);
-    --cached_;
-    return *this;
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  bool operator!=(StateIterator const&) const {
-    if (BENCHMARK_BUILTIN_EXPECT(cached_ != 0, true)) return true;
-    parent_->FinishKeepRunning();
-    return false;
-  }
-
- private:
-  size_t cached_;
-  State* const parent_;
-};
-
-inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::begin() {
-  return StateIterator(this);
-}
-inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::end() {
-  StartKeepRunning();
-  return StateIterator();
-}
-
-namespace internal {
-
-typedef void(Function)(State&);
-
-// ------------------------------------------------------
-// Benchmark registration object.  The BENCHMARK() macro expands
-// into an internal::Benchmark* object.  Various methods can
-// be called on this object to change the properties of the benchmark.
-// Each method returns "this" so that multiple method calls can
-// chained into one expression.
-class Benchmark {
- public:
-  virtual ~Benchmark();
-
-  // Note: the following methods all return "this" so that multiple
-  // method calls can be chained together in one expression.
-
-  // Run this benchmark once with "x" as the extra argument passed
-  // to the function.
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Arg(int64_t x);
-
-  // Run this benchmark with the given time unit for the generated output report
-  Benchmark* Unit(TimeUnit unit);
-
-  // Run this benchmark once for a number of values picked from the
-  // range [start..limit].  (start and limit are always picked.)
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Range(int64_t start, int64_t limit);
-
-  // Run this benchmark once for all values in the range [start..limit] with
-  // specific step
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* DenseRange(int64_t start, int64_t limit, int step = 1);
-
-  // Run this benchmark once with "args" as the extra arguments passed
-  // to the function.
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Args(const std::vector<int64_t>& args);
-
-  // Equivalent to Args({x, y})
-  // NOTE: This is a legacy C++03 interface provided for compatibility only.
-  //   New code should use 'Args'.
-  Benchmark* ArgPair(int64_t x, int64_t y) {
-    std::vector<int64_t> args;
-    args.push_back(x);
-    args.push_back(y);
-    return Args(args);
-  }
-
-  // Run this benchmark once for a number of values picked from the
-  // ranges [start..limit].  (starts and limits are always picked.)
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Ranges(const std::vector<std::pair<int64_t, int64_t> >& ranges);
-
-  // Equivalent to ArgNames({name})
-  Benchmark* ArgName(const std::string& name);
-
-  // Set the argument names to display in the benchmark name. If not called,
-  // only argument values will be shown.
-  Benchmark* ArgNames(const std::vector<std::string>& names);
-
-  // Equivalent to Ranges({{lo1, hi1}, {lo2, hi2}}).
-  // NOTE: This is a legacy C++03 interface provided for compatibility only.
-  //   New code should use 'Ranges'.
-  Benchmark* RangePair(int64_t lo1, int64_t hi1, int64_t lo2, int64_t hi2) {
-    std::vector<std::pair<int64_t, int64_t> > ranges;
-    ranges.push_back(std::make_pair(lo1, hi1));
-    ranges.push_back(std::make_pair(lo2, hi2));
-    return Ranges(ranges);
-  }
-
-  // Pass this benchmark object to *func, which can customize
-  // the benchmark by calling various methods like Arg, Args,
-  // Threads, etc.
-  Benchmark* Apply(void (*func)(Benchmark* benchmark));
-
-  // Set the range multiplier for non-dense range. If not called, the range
-  // multiplier kRangeMultiplier will be used.
-  Benchmark* RangeMultiplier(int multiplier);
-
-  // Set the minimum amount of time to use when running this benchmark. This
-  // option overrides the `benchmark_min_time` flag.
-  // REQUIRES: `t > 0` and `Iterations` has not been called on this benchmark.
-  Benchmark* MinTime(double t);
-
-  // Specify the amount of iterations that should be run by this benchmark.
-  // REQUIRES: 'n > 0' and `MinTime` has not been called on this benchmark.
-  //
-  // NOTE: This function should only be used when *exact* iteration control is
-  //   needed and never to control or limit how long a benchmark runs, where
-  // `--benchmark_min_time=N` or `MinTime(...)` should be used instead.
-  Benchmark* Iterations(size_t n);
-
-  // Specify the amount of times to repeat this benchmark. This option overrides
-  // the `benchmark_repetitions` flag.
-  // REQUIRES: `n > 0`
-  Benchmark* Repetitions(int n);
-
-  // Specify if each repetition of the benchmark should be reported separately
-  // or if only the final statistics should be reported. If the benchmark
-  // is not repeated then the single result is always reported.
-  // Applies to *ALL* reporters (display and file).
-  Benchmark* ReportAggregatesOnly(bool value = true);
-
-  // Same as ReportAggregatesOnly(), but applies to display reporter only.
-  Benchmark* DisplayAggregatesOnly(bool value = true);
-
-  // If a particular benchmark is I/O bound, runs multiple threads internally or
-  // if for some reason CPU timings are not representative, call this method. If
-  // called, the elapsed time will be used to control how many iterations are
-  // run, and in the printing of items/second or MB/seconds values.  If not
-  // called, the cpu time used by the benchmark will be used.
-  Benchmark* UseRealTime();
-
-  // If a benchmark must measure time manually (e.g. if GPU execution time is
-  // being
-  // measured), call this method. If called, each benchmark iteration should
-  // call
-  // SetIterationTime(seconds) to report the measured time, which will be used
-  // to control how many iterations are run, and in the printing of items/second
-  // or MB/second values.
-  Benchmark* UseManualTime();
-
-  // Set the asymptotic computational complexity for the benchmark. If called
-  // the asymptotic computational complexity will be shown on the output.
-  Benchmark* Complexity(BigO complexity = benchmark::oAuto);
-
-  // Set the asymptotic computational complexity for the benchmark. If called
-  // the asymptotic computational complexity will be shown on the output.
-  Benchmark* Complexity(BigOFunc* complexity);
-
-  // Add this statistics to be computed over all the values of benchmark run
-  Benchmark* ComputeStatistics(std::string name, StatisticsFunc* statistics);
-
-  // Support for running multiple copies of the same benchmark concurrently
-  // in multiple threads.  This may be useful when measuring the scaling
-  // of some piece of code.
-
-  // Run one instance of this benchmark concurrently in t threads.
-  Benchmark* Threads(int t);
-
-  // Pick a set of values T from [min_threads,max_threads].
-  // min_threads and max_threads are always included in T.  Run this
-  // benchmark once for each value in T.  The benchmark run for a
-  // particular value t consists of t threads running the benchmark
-  // function concurrently.  For example, consider:
-  //    BENCHMARK(Foo)->ThreadRange(1,16);
-  // This will run the following benchmarks:
-  //    Foo in 1 thread
-  //    Foo in 2 threads
-  //    Foo in 4 threads
-  //    Foo in 8 threads
-  //    Foo in 16 threads
-  Benchmark* ThreadRange(int min_threads, int max_threads);
-
-  // For each value n in the range, run this benchmark once using n threads.
-  // min_threads and max_threads are always included in the range.
-  // stride specifies the increment. E.g. DenseThreadRange(1, 8, 3) starts
-  // a benchmark with 1, 4, 7 and 8 threads.
-  Benchmark* DenseThreadRange(int min_threads, int max_threads, int stride = 1);
-
-  // Equivalent to ThreadRange(NumCPUs(), NumCPUs())
-  Benchmark* ThreadPerCpu();
-
-  virtual void Run(State& state) = 0;
-
- protected:
-  explicit Benchmark(const char* name);
-  Benchmark(Benchmark const&);
-  void SetName(const char* name);
-
-  int ArgsCnt() const;
-
- private:
-  friend class BenchmarkFamilies;
-
-  std::string name_;
-  AggregationReportMode aggregation_report_mode_;
-  std::vector<std::string> arg_names_;       // Args for all benchmark runs
-  std::vector<std::vector<int64_t> > args_;  // Args for all benchmark runs
-  TimeUnit time_unit_;
-  int range_multiplier_;
-  double min_time_;
-  size_t iterations_;
-  int repetitions_;
-  bool use_real_time_;
-  bool use_manual_time_;
-  BigO complexity_;
-  BigOFunc* complexity_lambda_;
-  std::vector<Statistics> statistics_;
-  std::vector<int> thread_counts_;
-
-  Benchmark& operator=(Benchmark const&);
-};
-
-}  // namespace internal
-
-// Create and register a benchmark with the specified 'name' that invokes
-// the specified functor 'fn'.
-//
-// RETURNS: A pointer to the registered benchmark.
-internal::Benchmark* RegisterBenchmark(const char* name,
-                                       internal::Function* fn);
-
-#if defined(BENCHMARK_HAS_CXX11)
-template <class Lambda>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn);
-#endif
-
-// Remove all registered benchmarks. All pointers to previously registered
-// benchmarks are invalidated.
-void ClearRegisteredBenchmarks();
-
-namespace internal {
-// The class used to hold all Benchmarks created from static function.
-// (ie those created using the BENCHMARK(...) macros.
-class FunctionBenchmark : public Benchmark {
- public:
-  FunctionBenchmark(const char* name, Function* func)
-      : Benchmark(name), func_(func) {}
-
-  virtual void Run(State& st);
-
- private:
-  Function* func_;
-};
-
-#ifdef BENCHMARK_HAS_CXX11
-template <class Lambda>
-class LambdaBenchmark : public Benchmark {
- public:
-  virtual void Run(State& st) { lambda_(st); }
-
- private:
-  template <class OLambda>
-  LambdaBenchmark(const char* name, OLambda&& lam)
-      : Benchmark(name), lambda_(std::forward<OLambda>(lam)) {}
-
-  LambdaBenchmark(LambdaBenchmark const&) = delete;
-
- private:
-  template <class Lam>
-  friend Benchmark* ::benchmark::RegisterBenchmark(const char*, Lam&&);
-
-  Lambda lambda_;
-};
-#endif
-
-}  // namespace internal
-
-inline internal::Benchmark* RegisterBenchmark(const char* name,
-                                              internal::Function* fn) {
-  return internal::RegisterBenchmarkInternal(
-      ::new internal::FunctionBenchmark(name, fn));
-}
-
-#ifdef BENCHMARK_HAS_CXX11
-template <class Lambda>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn) {
-  using BenchType =
-      internal::LambdaBenchmark<typename std::decay<Lambda>::type>;
-  return internal::RegisterBenchmarkInternal(
-      ::new BenchType(name, std::forward<Lambda>(fn)));
-}
-#endif
-
-#if defined(BENCHMARK_HAS_CXX11) && \
-    (!defined(BENCHMARK_GCC_VERSION) || BENCHMARK_GCC_VERSION >= 409)
-template <class Lambda, class... Args>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn,
-                                       Args&&... args) {
-  return benchmark::RegisterBenchmark(
-      name, [=](benchmark::State& st) { fn(st, args...); });
-}
-#else
-#define BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-#endif
-
-// The base class for all fixture tests.
-class Fixture : public internal::Benchmark {
- public:
-  Fixture() : internal::Benchmark("") {}
-
-  virtual void Run(State& st) {
-    this->SetUp(st);
-    this->BenchmarkCase(st);
-    this->TearDown(st);
-  }
-
-  // These will be deprecated ...
-  virtual void SetUp(const State&) {}
-  virtual void TearDown(const State&) {}
-  // ... In favor of these.
-  virtual void SetUp(State& st) { SetUp(const_cast<const State&>(st)); }
-  virtual void TearDown(State& st) { TearDown(const_cast<const State&>(st)); }
-
- protected:
-  virtual void BenchmarkCase(State&) = 0;
-};
-
-}  // namespace benchmark
-
-// ------------------------------------------------------
-// Macro to register benchmarks
-
-// Check that __COUNTER__ is defined and that __COUNTER__ increases by 1
-// every time it is expanded. X + 1 == X + 0 is used in case X is defined to be
-// empty. If X is empty the expression becomes (+1 == +0).
-#if defined(__COUNTER__) && (__COUNTER__ + 1 == __COUNTER__ + 0)
-#define BENCHMARK_PRIVATE_UNIQUE_ID __COUNTER__
-#else
-#define BENCHMARK_PRIVATE_UNIQUE_ID __LINE__
-#endif
-
-// Helpers for generating unique variable names
-#define BENCHMARK_PRIVATE_NAME(n) \
-  BENCHMARK_PRIVATE_CONCAT(_benchmark_, BENCHMARK_PRIVATE_UNIQUE_ID, n)
-#define BENCHMARK_PRIVATE_CONCAT(a, b, c) BENCHMARK_PRIVATE_CONCAT2(a, b, c)
-#define BENCHMARK_PRIVATE_CONCAT2(a, b, c) a##b##c
-
-#define BENCHMARK_PRIVATE_DECLARE(n)                                 \
-  static ::benchmark::internal::Benchmark* BENCHMARK_PRIVATE_NAME(n) \
-      BENCHMARK_UNUSED
-
-#define BENCHMARK(n)                                     \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(#n, n)))
-
-// Old-style macros
-#define BENCHMARK_WITH_ARG(n, a) BENCHMARK(n)->Arg((a))
-#define BENCHMARK_WITH_ARG2(n, a1, a2) BENCHMARK(n)->Args({(a1), (a2)})
-#define BENCHMARK_WITH_UNIT(n, t) BENCHMARK(n)->Unit((t))
-#define BENCHMARK_RANGE(n, lo, hi) BENCHMARK(n)->Range((lo), (hi))
-#define BENCHMARK_RANGE2(n, l1, h1, l2, h2) \
-  BENCHMARK(n)->RangePair({{(l1), (h1)}, {(l2), (h2)}})
-
-#ifdef BENCHMARK_HAS_CXX11
-
-// Register a benchmark which invokes the function specified by `func`
-// with the additional arguments specified by `...`.
-//
-// For example:
-//
-// template <class ...ExtraArgs>`
-// void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
-//  [...]
-//}
-// /* Registers a benchmark named "BM_takes_args/int_string_test` */
-// BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
-#define BENCHMARK_CAPTURE(func, test_case_name, ...)     \
-  BENCHMARK_PRIVATE_DECLARE(func) =                      \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(  \
-              #func "/" #test_case_name,                 \
-              [](::benchmark::State& st) { func(st, __VA_ARGS__); })))
-
-#endif  // BENCHMARK_HAS_CXX11
-
-// This will register a benchmark for a templatized function.  For example:
-//
-// template<int arg>
-// void BM_Foo(int iters);
-//
-// BENCHMARK_TEMPLATE(BM_Foo, 1);
-//
-// will register BM_Foo<1> as a benchmark.
-#define BENCHMARK_TEMPLATE1(n, a)                        \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(#n "<" #a ">", n<a>)))
-
-#define BENCHMARK_TEMPLATE2(n, a, b)                                         \
-  BENCHMARK_PRIVATE_DECLARE(n) =                                             \
-      (::benchmark::internal::RegisterBenchmarkInternal(                     \
-          new ::benchmark::internal::FunctionBenchmark(#n "<" #a "," #b ">", \
-                                                       n<a, b>)))
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE(n, ...)                       \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(  \
-              #n "<" #__VA_ARGS__ ">", n<__VA_ARGS__>)))
-#else
-#define BENCHMARK_TEMPLATE(n, a) BENCHMARK_TEMPLATE1(n, a)
-#endif
-
-#define BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method)        \
-  class BaseClass##_##Method##_Benchmark : public BaseClass { \
-   public:                                                    \
-    BaseClass##_##Method##_Benchmark() : BaseClass() {        \
-      this->SetName(#BaseClass "/" #Method);                  \
-    }                                                         \
-                                                              \
-   protected:                                                 \
-    virtual void BenchmarkCase(::benchmark::State&);          \
-  };
-
-#define BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<a> {    \
-   public:                                                          \
-    BaseClass##_##Method##_Benchmark() : BaseClass<a>() {           \
-      this->SetName(#BaseClass "<" #a ">/" #Method);                \
-    }                                                               \
-                                                                    \
-   protected:                                                       \
-    virtual void BenchmarkCase(::benchmark::State&);                \
-  };
-
-#define BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<a, b> {    \
-   public:                                                             \
-    BaseClass##_##Method##_Benchmark() : BaseClass<a, b>() {           \
-      this->SetName(#BaseClass "<" #a "," #b ">/" #Method);            \
-    }                                                                  \
-                                                                       \
-   protected:                                                          \
-    virtual void BenchmarkCase(::benchmark::State&);                   \
-  };
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, ...)       \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<__VA_ARGS__> { \
-   public:                                                                 \
-    BaseClass##_##Method##_Benchmark() : BaseClass<__VA_ARGS__>() {        \
-      this->SetName(#BaseClass "<" #__VA_ARGS__ ">/" #Method);             \
-    }                                                                      \
-                                                                           \
-   protected:                                                              \
-    virtual void BenchmarkCase(::benchmark::State&);                       \
-  };
-#else
-#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(n, a) \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(n, a)
-#endif
-
-#define BENCHMARK_DEFINE_F(BaseClass, Method)    \
-  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)    \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE2_DEFINE_F(BaseClass, Method, a, b)    \
-  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, ...)            \
-  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-#else
-#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, a) \
-  BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)
-#endif
-
-#define BENCHMARK_REGISTER_F(BaseClass, Method) \
-  BENCHMARK_PRIVATE_REGISTER_F(BaseClass##_##Method##_Benchmark)
-
-#define BENCHMARK_PRIVATE_REGISTER_F(TestName) \
-  BENCHMARK_PRIVATE_DECLARE(TestName) =        \
-      (::benchmark::internal::RegisterBenchmarkInternal(new TestName()))
-
-// This macro will define and register a benchmark within a fixture class.
-#define BENCHMARK_F(BaseClass, Method)           \
-  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);       \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)           \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                    \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE2_F(BaseClass, Method, a, b)           \
-  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                       \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_F(BaseClass, Method, ...)                   \
-  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                             \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-#else
-#define BENCHMARK_TEMPLATE_F(BaseClass, Method, a) \
-  BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)
-#endif
-
-// Helper macro to create a main routine in a test that runs the benchmarks
-#define BENCHMARK_MAIN()                                                \
-  int main(int argc, char** argv) {                                     \
-    ::benchmark::Initialize(&argc, argv);                               \
-    if (::benchmark::ReportUnrecognizedArguments(argc, argv)) return 1; \
-    ::benchmark::RunSpecifiedBenchmarks();                              \
-  }                                                                     \
-  int main(int, char**)
-
-// ------------------------------------------------------
-// Benchmark Reporters
-
-namespace benchmark {
-
-struct CPUInfo {
-  struct CacheInfo {
-    std::string type;
-    int level;
-    int size;
-    int num_sharing;
-  };
-
-  int num_cpus;
-  double cycles_per_second;
-  std::vector<CacheInfo> caches;
-  bool scaling_enabled;
-  std::vector<double> load_avg;
-
-  static const CPUInfo& Get();
-
- private:
-  CPUInfo();
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(CPUInfo);
-};
-
-//Adding Struct for System Information
-struct SystemInfo {
-  std::string name;
-  static const SystemInfo& Get();
- private:
-  SystemInfo();
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(SystemInfo);
-};
-
-// Interface for custom benchmark result printers.
-// By default, benchmark reports are printed to stdout. However an application
-// can control the destination of the reports by calling
-// RunSpecifiedBenchmarks and passing it a custom reporter object.
-// The reporter object must implement the following interface.
-class BenchmarkReporter {
- public:
-  struct Context {
-    CPUInfo const& cpu_info;
-    SystemInfo const& sys_info;
-    // The number of chars in the longest benchmark name.
-    size_t name_field_width;
-    static const char* executable_name;
-    Context();
-  };
-
-  struct Run {
-    enum RunType { RT_Iteration, RT_Aggregate };
-
-    Run()
-        : run_type(RT_Iteration),
-          error_occurred(false),
-          iterations(1),
-          time_unit(kNanosecond),
-          real_accumulated_time(0),
-          cpu_accumulated_time(0),
-          max_heapbytes_used(0),
-          complexity(oNone),
-          complexity_lambda(),
-          complexity_n(0),
-          report_big_o(false),
-          report_rms(false),
-          counters(),
-          has_memory_result(false),
-          allocs_per_iter(0.0),
-          max_bytes_used(0) {}
-
-    std::string benchmark_name() const;
-    std::string run_name;
-    RunType run_type;          // is this a measurement, or an aggregate?
-    std::string aggregate_name;
-    std::string report_label;  // Empty if not set by benchmark.
-    bool error_occurred;
-    std::string error_message;
-
-    int64_t iterations;
-    TimeUnit time_unit;
-    double real_accumulated_time;
-    double cpu_accumulated_time;
-
-    // Return a value representing the real time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedRealTime() const;
-
-    // Return a value representing the cpu time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedCPUTime() const;
-
-    // This is set to 0.0 if memory tracing is not enabled.
-    double max_heapbytes_used;
-
-    // Keep track of arguments to compute asymptotic complexity
-    BigO complexity;
-    BigOFunc* complexity_lambda;
-    int64_t complexity_n;
-
-    // what statistics to compute from the measurements
-    const std::vector<internal::Statistics>* statistics;
-
-    // Inform print function whether the current run is a complexity report
-    bool report_big_o;
-    bool report_rms;
-
-    UserCounters counters;
-
-    // Memory metrics.
-    bool has_memory_result;
-    double allocs_per_iter;
-    int64_t max_bytes_used;
-  };
-
-  // Construct a BenchmarkReporter with the output stream set to 'std::cout'
-  // and the error stream set to 'std::cerr'
-  BenchmarkReporter();
-
-  // Called once for every suite of benchmarks run.
-  // The parameter "context" contains information that the
-  // reporter may wish to use when generating its report, for example the
-  // platform under which the benchmarks are running. The benchmark run is
-  // never started if this function returns false, allowing the reporter
-  // to skip runs based on the context information.
-  virtual bool ReportContext(const Context& context) = 0;
-
-  // Called once for each group of benchmark runs, gives information about
-  // cpu-time and heap memory usage during the benchmark run. If the group
-  // of runs contained more than two entries then 'report' contains additional
-  // elements representing the mean and standard deviation of those runs.
-  // Additionally if this group of runs was the last in a family of benchmarks
-  // 'reports' contains additional entries representing the asymptotic
-  // complexity and RMS of that benchmark family.
-  virtual void ReportRuns(const std::vector<Run>& report) = 0;
-
-  // Called once and only once after ever group of benchmarks is run and
-  // reported.
-  virtual void Finalize() {}
-
-  // REQUIRES: The object referenced by 'out' is valid for the lifetime
-  // of the reporter.
-  void SetOutputStream(std::ostream* out) {
-    assert(out);
-    output_stream_ = out;
-  }
-
-  // REQUIRES: The object referenced by 'err' is valid for the lifetime
-  // of the reporter.
-  void SetErrorStream(std::ostream* err) {
-    assert(err);
-    error_stream_ = err;
-  }
-
-  std::ostream& GetOutputStream() const { return *output_stream_; }
-
-  std::ostream& GetErrorStream() const { return *error_stream_; }
-
-  virtual ~BenchmarkReporter();
-
-  // Write a human readable string to 'out' representing the specified
-  // 'context'.
-  // REQUIRES: 'out' is non-null.
-  static void PrintBasicContext(std::ostream* out, Context const& context);
-
- private:
-  std::ostream* output_stream_;
-  std::ostream* error_stream_;
-};
-
-// Simple reporter that outputs benchmark data to the console. This is the
-// default reporter used by RunSpecifiedBenchmarks().
-class ConsoleReporter : public BenchmarkReporter {
- public:
-  enum OutputOptions {
-    OO_None = 0,
-    OO_Color = 1,
-    OO_Tabular = 2,
-    OO_ColorTabular = OO_Color | OO_Tabular,
-    OO_Defaults = OO_ColorTabular
-  };
-  explicit ConsoleReporter(OutputOptions opts_ = OO_Defaults)
-      : output_options_(opts_),
-        name_field_width_(0),
-        prev_counters_(),
-        printed_header_(false) {}
-
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-
- protected:
-  virtual void PrintRunData(const Run& report);
-  virtual void PrintHeader(const Run& report);
-
-  OutputOptions output_options_;
-  size_t name_field_width_;
-  UserCounters prev_counters_;
-  bool printed_header_;
-};
-
-class JSONReporter : public BenchmarkReporter {
- public:
-  JSONReporter() : first_report_(true) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-  virtual void Finalize();
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool first_report_;
-};
-
-class BENCHMARK_DEPRECATED_MSG("The CSV Reporter will be removed in a future release")
-      CSVReporter : public BenchmarkReporter {
- public:
-  CSVReporter() : printed_header_(false) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool printed_header_;
-  std::set<std::string> user_counter_names_;
-};
-
-// If a MemoryManager is registered, it can be used to collect and report
-// allocation metrics for a run of the benchmark.
-class MemoryManager {
- public:
-  struct Result {
-    Result() : num_allocs(0), max_bytes_used(0) {}
-
-    // The number of allocations made in total between Start and Stop.
-    int64_t num_allocs;
-
-    // The peak memory use between Start and Stop.
-    int64_t max_bytes_used;
-  };
-
-  virtual ~MemoryManager() {}
-
-  // Implement this to start recording allocation information.
-  virtual void Start() = 0;
-
-  // Implement this to stop recording and fill out the given Result structure.
-  virtual void Stop(Result* result) = 0;
-};
-
-inline const char* GetTimeUnitString(TimeUnit unit) {
-  switch (unit) {
-    case kMillisecond:
-      return "ms";
-    case kMicrosecond:
-      return "us";
-    case kNanosecond:
-      return "ns";
-  }
-  BENCHMARK_UNREACHABLE();
-}
-
-inline double GetTimeUnitMultiplier(TimeUnit unit) {
-  switch (unit) {
-    case kMillisecond:
-      return 1e3;
-    case kMicrosecond:
-      return 1e6;
-    case kNanosecond:
-      return 1e9;
-  }
-  BENCHMARK_UNREACHABLE();
-}
-
-}  // namespace benchmark
-
-#endif  // BENCHMARK_BENCHMARK_H_
diff --git a/third_party/google-benchmark/mingw.py b/third_party/google-benchmark/mingw.py
deleted file mode 100644
index 706ad55..0000000
--- a/third_party/google-benchmark/mingw.py
+++ /dev/null
@@ -1,320 +0,0 @@
-#! /usr/bin/env python
-# encoding: utf-8
-
-import argparse
-import errno
-import logging
-import os
-import platform
-import re
-import sys
-import subprocess
-import tempfile
-
-try:
-    import winreg
-except ImportError:
-    import _winreg as winreg
-try:
-    import urllib.request as request
-except ImportError:
-    import urllib as request
-try:
-    import urllib.parse as parse
-except ImportError:
-    import urlparse as parse
-
-class EmptyLogger(object):
-    '''
-    Provides an implementation that performs no logging
-    '''
-    def debug(self, *k, **kw):
-        pass
-    def info(self, *k, **kw):
-        pass
-    def warn(self, *k, **kw):
-        pass
-    def error(self, *k, **kw):
-        pass
-    def critical(self, *k, **kw):
-        pass
-    def setLevel(self, *k, **kw):
-        pass
-
-urls = (
-    'http://downloads.sourceforge.net/project/mingw-w64/Toolchains%20'
-        'targetting%20Win32/Personal%20Builds/mingw-builds/installer/'
-        'repository.txt',
-    'http://downloads.sourceforge.net/project/mingwbuilds/host-windows/'
-        'repository.txt'
-)
-'''
-A list of mingw-build repositories
-'''
-
-def repository(urls = urls, log = EmptyLogger()):
-    '''
-    Downloads and parse mingw-build repository files and parses them
-    '''
-    log.info('getting mingw-builds repository')
-    versions = {}
-    re_sourceforge = re.compile(r'http://sourceforge.net/projects/([^/]+)/files')
-    re_sub = r'http://downloads.sourceforge.net/project/\1'
-    for url in urls:
-        log.debug(' - requesting: %s', url)
-        socket = request.urlopen(url)
-        repo = socket.read()
-        if not isinstance(repo, str):
-            repo = repo.decode();
-        socket.close()
-        for entry in repo.split('\n')[:-1]:
-            value = entry.split('|')
-            version = tuple([int(n) for n in value[0].strip().split('.')])
-            version = versions.setdefault(version, {})
-            arch = value[1].strip()
-            if arch == 'x32':
-                arch = 'i686'
-            elif arch == 'x64':
-                arch = 'x86_64'
-            arch = version.setdefault(arch, {})
-            threading = arch.setdefault(value[2].strip(), {})
-            exceptions = threading.setdefault(value[3].strip(), {})
-            revision = exceptions.setdefault(int(value[4].strip()[3:]),
-                re_sourceforge.sub(re_sub, value[5].strip()))
-    return versions
-
-def find_in_path(file, path=None):
-    '''
-    Attempts to find an executable in the path
-    '''
-    if platform.system() == 'Windows':
-        file += '.exe'
-    if path is None:
-        path = os.environ.get('PATH', '')
-    if type(path) is type(''):
-        path = path.split(os.pathsep)
-    return list(filter(os.path.exists,
-        map(lambda dir, file=file: os.path.join(dir, file), path)))
-
-def find_7zip(log = EmptyLogger()):
-    '''
-    Attempts to find 7zip for unpacking the mingw-build archives
-    '''
-    log.info('finding 7zip')
-    path = find_in_path('7z')
-    if not path:
-        key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r'SOFTWARE\7-Zip')
-        path, _ = winreg.QueryValueEx(key, 'Path')
-        path = [os.path.join(path, '7z.exe')]
-    log.debug('found \'%s\'', path[0])
-    return path[0]
-
-find_7zip()
-
-def unpack(archive, location, log = EmptyLogger()):
-    '''
-    Unpacks a mingw-builds archive
-    '''
-    sevenzip = find_7zip(log)
-    log.info('unpacking %s', os.path.basename(archive))
-    cmd = [sevenzip, 'x', archive, '-o' + location, '-y']
-    log.debug(' - %r', cmd)
-    with open(os.devnull, 'w') as devnull:
-        subprocess.check_call(cmd, stdout = devnull)
-
-def download(url, location, log = EmptyLogger()):
-    '''
-    Downloads and unpacks a mingw-builds archive
-    '''
-    log.info('downloading MinGW')
-    log.debug(' - url: %s', url)
-    log.debug(' - location: %s', location)
-
-    re_content = re.compile(r'attachment;[ \t]*filename=(")?([^"]*)(")?[\r\n]*')
-
-    stream = request.urlopen(url)
-    try:
-        content = stream.getheader('Content-Disposition') or ''
-    except AttributeError:
-        content = stream.headers.getheader('Content-Disposition') or ''
-    matches = re_content.match(content)
-    if matches:
-        filename = matches.group(2)
-    else:
-        parsed = parse.urlparse(stream.geturl())
-        filename = os.path.basename(parsed.path)
-
-    try:
-        os.makedirs(location)
-    except OSError as e:
-        if e.errno == errno.EEXIST and os.path.isdir(location):
-            pass
-        else:
-            raise
-
-    archive = os.path.join(location, filename)
-    with open(archive, 'wb') as out:
-        while True:
-            buf = stream.read(1024)
-            if not buf:
-                break
-            out.write(buf)
-    unpack(archive, location, log = log)
-    os.remove(archive)
-
-    possible = os.path.join(location, 'mingw64')
-    if not os.path.exists(possible):
-        possible = os.path.join(location, 'mingw32')
-        if not os.path.exists(possible):
-            raise ValueError('Failed to find unpacked MinGW: ' + possible)
-    return possible
-
-def root(location = None, arch = None, version = None, threading = None,
-        exceptions = None, revision = None, log = EmptyLogger()):
-    '''
-    Returns the root folder of a specific version of the mingw-builds variant
-    of gcc. Will download the compiler if needed
-    '''
-
-    # Get the repository if we don't have all the information
-    if not (arch and version and threading and exceptions and revision):
-        versions = repository(log = log)
-
-    # Determine some defaults
-    version = version or max(versions.keys())
-    if not arch:
-        arch = platform.machine().lower()
-        if arch == 'x86':
-            arch = 'i686'
-        elif arch == 'amd64':
-            arch = 'x86_64'
-    if not threading:
-        keys = versions[version][arch].keys()
-        if 'posix' in keys:
-            threading = 'posix'
-        elif 'win32' in keys:
-            threading = 'win32'
-        else:
-            threading = keys[0]
-    if not exceptions:
-        keys = versions[version][arch][threading].keys()
-        if 'seh' in keys:
-            exceptions = 'seh'
-        elif 'sjlj' in keys:
-            exceptions = 'sjlj'
-        else:
-            exceptions = keys[0]
-    if revision == None:
-        revision = max(versions[version][arch][threading][exceptions].keys())
-    if not location:
-        location = os.path.join(tempfile.gettempdir(), 'mingw-builds')
-
-    # Get the download url
-    url = versions[version][arch][threading][exceptions][revision]
-
-    # Tell the user whatzzup
-    log.info('finding MinGW %s', '.'.join(str(v) for v in version))
-    log.debug(' - arch: %s', arch)
-    log.debug(' - threading: %s', threading)
-    log.debug(' - exceptions: %s', exceptions)
-    log.debug(' - revision: %s', revision)
-    log.debug(' - url: %s', url)
-
-    # Store each specific revision differently
-    slug = '{version}-{arch}-{threading}-{exceptions}-rev{revision}'
-    slug = slug.format(
-        version = '.'.join(str(v) for v in version),
-        arch = arch,
-        threading = threading,
-        exceptions = exceptions,
-        revision = revision
-    )
-    if arch == 'x86_64':
-        root_dir = os.path.join(location, slug, 'mingw64')
-    elif arch == 'i686':
-        root_dir = os.path.join(location, slug, 'mingw32')
-    else:
-        raise ValueError('Unknown MinGW arch: ' + arch)
-
-    # Download if needed
-    if not os.path.exists(root_dir):
-        downloaded = download(url, os.path.join(location, slug), log = log)
-        if downloaded != root_dir:
-            raise ValueError('The location of mingw did not match\n%s\n%s'
-                % (downloaded, root_dir))
-
-    return root_dir
-
-def str2ver(string):
-    '''
-    Converts a version string into a tuple
-    '''
-    try:
-        version = tuple(int(v) for v in string.split('.'))
-        if len(version) is not 3:
-            raise ValueError()
-    except ValueError:
-        raise argparse.ArgumentTypeError(
-            'please provide a three digit version string')
-    return version
-
-def main():
-    '''
-    Invoked when the script is run directly by the python interpreter
-    '''
-    parser = argparse.ArgumentParser(
-        description = 'Downloads a specific version of MinGW',
-        formatter_class = argparse.ArgumentDefaultsHelpFormatter
-    )
-    parser.add_argument('--location',
-        help = 'the location to download the compiler to',
-        default = os.path.join(tempfile.gettempdir(), 'mingw-builds'))
-    parser.add_argument('--arch', required = True, choices = ['i686', 'x86_64'],
-        help = 'the target MinGW architecture string')
-    parser.add_argument('--version', type = str2ver,
-        help = 'the version of GCC to download')
-    parser.add_argument('--threading', choices = ['posix', 'win32'],
-        help = 'the threading type of the compiler')
-    parser.add_argument('--exceptions', choices = ['sjlj', 'seh', 'dwarf'],
-        help = 'the method to throw exceptions')
-    parser.add_argument('--revision', type=int,
-        help = 'the revision of the MinGW release')
-    group = parser.add_mutually_exclusive_group()
-    group.add_argument('-v', '--verbose', action='store_true',
-        help='increase the script output verbosity')
-    group.add_argument('-q', '--quiet', action='store_true',
-        help='only print errors and warning')
-    args = parser.parse_args()
-
-    # Create the logger
-    logger = logging.getLogger('mingw')
-    handler = logging.StreamHandler()
-    formatter = logging.Formatter('%(message)s')
-    handler.setFormatter(formatter)
-    logger.addHandler(handler)
-    logger.setLevel(logging.INFO)
-    if args.quiet:
-        logger.setLevel(logging.WARN)
-    if args.verbose:
-        logger.setLevel(logging.DEBUG)
-
-    # Get MinGW
-    root_dir = root(location = args.location, arch = args.arch,
-        version = args.version, threading = args.threading,
-        exceptions = args.exceptions, revision = args.revision,
-        log = logger)
-
-    sys.stdout.write('%s\n' % os.path.join(root_dir, 'bin'))
-
-if __name__ == '__main__':
-    try:
-        main()
-    except IOError as e:
-        sys.stderr.write('IO error: %s\n' % e)
-        sys.exit(1)
-    except OSError as e:
-        sys.stderr.write('OS error: %s\n' % e)
-        sys.exit(1)
-    except KeyboardInterrupt as e:
-        sys.stderr.write('Killed\n')
-        sys.exit(1)
diff --git a/third_party/google-benchmark/releasing.md b/third_party/google-benchmark/releasing.md
deleted file mode 100644
index f0cd701..0000000
--- a/third_party/google-benchmark/releasing.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# How to release
-
-* Make sure you're on master and synced to HEAD
-* Ensure the project builds and tests run (sanity check only, obviously)
-    * `parallel -j0 exec ::: test/*_test` can help ensure everything at least
-      passes
-* Prepare release notes
-    * `git log $(git describe --abbrev=0 --tags)..HEAD` gives you the list of
-      commits between the last annotated tag and HEAD
-    * Pick the most interesting.
-* Create a release through github's interface
-    * Note this will create a lightweight tag.
-    * Update this to an annotated tag:
-      * `git pull --tags`
-      * `git tag -a -f <tag> <tag>`
-      * `git push --force origin`
diff --git a/third_party/google-benchmark/src/CMakeLists.txt b/third_party/google-benchmark/src/CMakeLists.txt
deleted file mode 100644
index 977474f..0000000
--- a/third_party/google-benchmark/src/CMakeLists.txt
+++ /dev/null
@@ -1,108 +0,0 @@
-# Allow the source files to find headers in src/
-include_directories(${PROJECT_SOURCE_DIR}/src)
-
-if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
-  list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-  list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-endif()
-
-file(GLOB
-  SOURCE_FILES
-    *.cc
-    ${PROJECT_SOURCE_DIR}/include/benchmark/*.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
-file(GLOB BENCHMARK_MAIN "benchmark_main.cc")
-foreach(item ${BENCHMARK_MAIN})
-  list(REMOVE_ITEM SOURCE_FILES "${item}")
-endforeach()
-
-add_library(benchmark ${SOURCE_FILES})
-set_target_properties(benchmark PROPERTIES
-  OUTPUT_NAME "benchmark"
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-target_include_directories(benchmark PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
-    )
-
-# Link threads.
-target_link_libraries(benchmark  ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-find_library(LIBRT rt)
-if(LIBRT)
-  target_link_libraries(benchmark ${LIBRT})
-endif()
-
-# We need extra libraries on Windows
-if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  target_link_libraries(benchmark Shlwapi)
-endif()
-
-# We need extra libraries on Solaris
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
-  target_link_libraries(benchmark kstat)
-endif()
-
-# Benchmark main library
-add_library(benchmark_main "benchmark_main.cc")
-set_target_properties(benchmark_main PROPERTIES
-  OUTPUT_NAME "benchmark_main"
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-target_include_directories(benchmark PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
-    )
-target_link_libraries(benchmark_main benchmark)
-
-set(include_install_dir "include")
-set(lib_install_dir "lib/")
-set(bin_install_dir "bin/")
-set(config_install_dir "lib/cmake/${PROJECT_NAME}")
-set(pkgconfig_install_dir "lib/pkgconfig")
-
-set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
-
-set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
-set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
-set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
-set(targets_export_name "${PROJECT_NAME}Targets")
-
-set(namespace "${PROJECT_NAME}::")
-
-include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-  "${version_config}" VERSION ${GENERIC_LIB_VERSION} COMPATIBILITY SameMajorVersion
-)
-
-configure_file("${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in" "${project_config}" @ONLY)
-configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)
-
-if (BENCHMARK_ENABLE_INSTALL)
-  # Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
-  install(
-    TARGETS benchmark benchmark_main
-    EXPORT ${targets_export_name}
-    ARCHIVE DESTINATION ${lib_install_dir}
-    LIBRARY DESTINATION ${lib_install_dir}
-    RUNTIME DESTINATION ${bin_install_dir}
-    INCLUDES DESTINATION ${include_install_dir})
-
-  install(
-    DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
-    DESTINATION ${include_install_dir}
-    FILES_MATCHING PATTERN "*.*h")
-
-  install(
-      FILES "${project_config}" "${version_config}"
-      DESTINATION "${config_install_dir}")
-
-  install(
-      FILES "${pkg_config}"
-      DESTINATION "${pkgconfig_install_dir}")
-
-  install(
-      EXPORT "${targets_export_name}"
-      NAMESPACE "${namespace}"
-      DESTINATION "${config_install_dir}")
-endif()
diff --git a/third_party/google-benchmark/src/arraysize.h b/third_party/google-benchmark/src/arraysize.h
deleted file mode 100644
index 51a50f2..0000000
--- a/third_party/google-benchmark/src/arraysize.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_ARRAYSIZE_H_
-#define BENCHMARK_ARRAYSIZE_H_
-
-#include "internal_macros.h"
-
-namespace benchmark {
-namespace internal {
-// The arraysize(arr) macro returns the # of elements in an array arr.
-// The expression is a compile-time constant, and therefore can be
-// used in defining new arrays, for example.  If you use arraysize on
-// a pointer by mistake, you will get a compile-time error.
-//
-
-// This template function declaration is used in defining arraysize.
-// Note that the function doesn't need an implementation, as we only
-// use its type.
-template <typename T, size_t N>
-char (&ArraySizeHelper(T (&array)[N]))[N];
-
-// That gcc wants both of these prototypes seems mysterious. VC, for
-// its part, can't decide which to use (another mystery). Matching of
-// template overloads: the final frontier.
-#ifndef COMPILER_MSVC
-template <typename T, size_t N>
-char (&ArraySizeHelper(const T (&array)[N]))[N];
-#endif
-
-#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_ARRAYSIZE_H_
diff --git a/third_party/google-benchmark/src/benchmark.cc b/third_party/google-benchmark/src/benchmark.cc
deleted file mode 100644
index aab0750..0000000
--- a/third_party/google-benchmark/src/benchmark.cc
+++ /dev/null
@@ -1,493 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "benchmark_runner.h"
-#include "internal_macros.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "thread_manager.h"
-#include "thread_timer.h"
-
-DEFINE_bool(benchmark_list_tests, false,
-            "Print a list of benchmarks. This option overrides all other "
-            "options.");
-
-DEFINE_string(benchmark_filter, ".",
-              "A regular expression that specifies the set of benchmarks "
-              "to execute.  If this flag is empty, or if this flag is the "
-              "string \"all\", all benchmarks linked into the binary are "
-              "run.");
-
-DEFINE_double(benchmark_min_time, 0.5,
-              "Minimum number of seconds we should run benchmark before "
-              "results are considered significant.  For cpu-time based "
-              "tests, this is the lower bound on the total cpu time "
-              "used by all threads that make up the test.  For real-time "
-              "based tests, this is the lower bound on the elapsed time "
-              "of the benchmark execution, regardless of number of "
-              "threads.");
-
-DEFINE_int32(benchmark_repetitions, 1,
-             "The number of runs of each benchmark. If greater than 1, the "
-             "mean and standard deviation of the runs will be reported.");
-
-DEFINE_bool(
-    benchmark_report_aggregates_only, false,
-    "Report the result of each benchmark repetitions. When 'true' is specified "
-    "only the mean, standard deviation, and other statistics are reported for "
-    "repeated benchmarks. Affects all reporters.");
-
-DEFINE_bool(
-    benchmark_display_aggregates_only, false,
-    "Display the result of each benchmark repetitions. When 'true' is "
-    "specified only the mean, standard deviation, and other statistics are "
-    "displayed for repeated benchmarks. Unlike "
-    "benchmark_report_aggregates_only, only affects the display reporter, but "
-    "*NOT* file reporter, which will still contain all the output.");
-
-DEFINE_string(benchmark_format, "console",
-              "The format to use for console output. Valid values are "
-              "'console', 'json', or 'csv'.");
-
-DEFINE_string(benchmark_out_format, "json",
-              "The format to use for file output. Valid values are "
-              "'console', 'json', or 'csv'.");
-
-DEFINE_string(benchmark_out, "", "The file to write additional output to");
-
-DEFINE_string(benchmark_color, "auto",
-              "Whether to use colors in the output.  Valid values: "
-              "'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use "
-              "colors if the output is being sent to a terminal and the TERM "
-              "environment variable is set to a terminal type that supports "
-              "colors.");
-
-DEFINE_bool(benchmark_counters_tabular, false,
-            "Whether to use tabular format when printing user counters to "
-            "the console.  Valid values: 'true'/'yes'/1, 'false'/'no'/0."
-            "Defaults to false.");
-
-DEFINE_int32(v, 0, "The level of verbose logging to output");
-
-namespace benchmark {
-
-namespace internal {
-
-// FIXME: wouldn't LTO mess this up?
-void UseCharPointer(char const volatile*) {}
-
-}  // namespace internal
-
-State::State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
-             int n_threads, internal::ThreadTimer* timer,
-             internal::ThreadManager* manager)
-    : total_iterations_(0),
-      batch_leftover_(0),
-      max_iterations(max_iters),
-      started_(false),
-      finished_(false),
-      error_occurred_(false),
-      range_(ranges),
-      complexity_n_(0),
-      counters(),
-      thread_index(thread_i),
-      threads(n_threads),
-      timer_(timer),
-      manager_(manager) {
-  CHECK(max_iterations != 0) << "At least one iteration must be run";
-  CHECK_LT(thread_index, threads) << "thread_index must be less than threads";
-
-  // Note: The use of offsetof below is technically undefined until C++17
-  // because State is not a standard layout type. However, all compilers
-  // currently provide well-defined behavior as an extension (which is
-  // demonstrated since constexpr evaluation must diagnose all undefined
-  // behavior). However, GCC and Clang also warn about this use of offsetof,
-  // which must be suppressed.
-#if defined(__INTEL_COMPILER)
-#pragma warning push
-#pragma warning(disable:1875)
-#elif defined(__GNUC__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Winvalid-offsetof"
-#endif
-  // Offset tests to ensure commonly accessed data is on the first cache line.
-  const int cache_line_size = 64;
-  static_assert(offsetof(State, error_occurred_) <=
-                    (cache_line_size - sizeof(error_occurred_)),
-                "");
-#if defined(__INTEL_COMPILER)
-#pragma warning pop
-#elif defined(__GNUC__)
-#pragma GCC diagnostic pop
-#endif
-}
-
-void State::PauseTiming() {
-  // Add in time accumulated so far
-  CHECK(started_ && !finished_ && !error_occurred_);
-  timer_->StopTimer();
-}
-
-void State::ResumeTiming() {
-  CHECK(started_ && !finished_ && !error_occurred_);
-  timer_->StartTimer();
-}
-
-void State::SkipWithError(const char* msg) {
-  CHECK(msg);
-  error_occurred_ = true;
-  {
-    MutexLock l(manager_->GetBenchmarkMutex());
-    if (manager_->results.has_error_ == false) {
-      manager_->results.error_message_ = msg;
-      manager_->results.has_error_ = true;
-    }
-  }
-  total_iterations_ = 0;
-  if (timer_->running()) timer_->StopTimer();
-}
-
-void State::SetIterationTime(double seconds) {
-  timer_->SetIterationTime(seconds);
-}
-
-void State::SetLabel(const char* label) {
-  MutexLock l(manager_->GetBenchmarkMutex());
-  manager_->results.report_label_ = label;
-}
-
-void State::StartKeepRunning() {
-  CHECK(!started_ && !finished_);
-  started_ = true;
-  total_iterations_ = error_occurred_ ? 0 : max_iterations;
-  manager_->StartStopBarrier();
-  if (!error_occurred_) ResumeTiming();
-}
-
-void State::FinishKeepRunning() {
-  CHECK(started_ && (!finished_ || error_occurred_));
-  if (!error_occurred_) {
-    PauseTiming();
-  }
-  // Total iterations has now wrapped around past 0. Fix this.
-  total_iterations_ = 0;
-  finished_ = true;
-  manager_->StartStopBarrier();
-}
-
-namespace internal {
-namespace {
-
-void RunBenchmarks(const std::vector<BenchmarkInstance>& benchmarks,
-                   BenchmarkReporter* display_reporter,
-                   BenchmarkReporter* file_reporter) {
-  // Note the file_reporter can be null.
-  CHECK(display_reporter != nullptr);
-
-  // Determine the width of the name field using a minimum width of 10.
-  bool might_have_aggregates = FLAGS_benchmark_repetitions > 1;
-  size_t name_field_width = 10;
-  size_t stat_field_width = 0;
-  for (const BenchmarkInstance& benchmark : benchmarks) {
-    name_field_width =
-        std::max<size_t>(name_field_width, benchmark.name.size());
-    might_have_aggregates |= benchmark.repetitions > 1;
-
-    for (const auto& Stat : *benchmark.statistics)
-      stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size());
-  }
-  if (might_have_aggregates) name_field_width += 1 + stat_field_width;
-
-  // Print header here
-  BenchmarkReporter::Context context;
-  context.name_field_width = name_field_width;
-
-  // Keep track of running times of all instances of current benchmark
-  std::vector<BenchmarkReporter::Run> complexity_reports;
-
-  // We flush streams after invoking reporter methods that write to them. This
-  // ensures users get timely updates even when streams are not line-buffered.
-  auto flushStreams = [](BenchmarkReporter* reporter) {
-    if (!reporter) return;
-    std::flush(reporter->GetOutputStream());
-    std::flush(reporter->GetErrorStream());
-  };
-
-  if (display_reporter->ReportContext(context) &&
-      (!file_reporter || file_reporter->ReportContext(context))) {
-    flushStreams(display_reporter);
-    flushStreams(file_reporter);
-
-    for (const auto& benchmark : benchmarks) {
-      RunResults run_results = RunBenchmark(benchmark, &complexity_reports);
-
-      auto report = [&run_results](BenchmarkReporter* reporter,
-                                   bool report_aggregates_only) {
-        assert(reporter);
-        // If there are no aggregates, do output non-aggregates.
-        report_aggregates_only &= !run_results.aggregates_only.empty();
-        if (!report_aggregates_only)
-          reporter->ReportRuns(run_results.non_aggregates);
-        if (!run_results.aggregates_only.empty())
-          reporter->ReportRuns(run_results.aggregates_only);
-      };
-
-      report(display_reporter, run_results.display_report_aggregates_only);
-      if (file_reporter)
-        report(file_reporter, run_results.file_report_aggregates_only);
-
-      flushStreams(display_reporter);
-      flushStreams(file_reporter);
-    }
-  }
-  display_reporter->Finalize();
-  if (file_reporter) file_reporter->Finalize();
-  flushStreams(display_reporter);
-  flushStreams(file_reporter);
-}
-
-std::unique_ptr<BenchmarkReporter> CreateReporter(
-    std::string const& name, ConsoleReporter::OutputOptions output_opts) {
-  typedef std::unique_ptr<BenchmarkReporter> PtrType;
-  if (name == "console") {
-    return PtrType(new ConsoleReporter(output_opts));
-  } else if (name == "json") {
-    return PtrType(new JSONReporter);
-  } else if (name == "csv") {
-    return PtrType(new CSVReporter);
-  } else {
-    std::cerr << "Unexpected format: '" << name << "'\n";
-    std::exit(1);
-  }
-}
-
-}  // end namespace
-
-bool IsZero(double n) {
-  return std::abs(n) < std::numeric_limits<double>::epsilon();
-}
-
-ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) {
-  int output_opts = ConsoleReporter::OO_Defaults;
-  auto is_benchmark_color = [force_no_color] () -> bool {
-    if (force_no_color) {
-      return false;
-    }
-    if (FLAGS_benchmark_color == "auto") {
-      return IsColorTerminal();
-    }
-    return IsTruthyFlagValue(FLAGS_benchmark_color);
-  };
-  if (is_benchmark_color()) {
-    output_opts |= ConsoleReporter::OO_Color;
-  } else {
-    output_opts &= ~ConsoleReporter::OO_Color;
-  }
-  if (FLAGS_benchmark_counters_tabular) {
-    output_opts |= ConsoleReporter::OO_Tabular;
-  } else {
-    output_opts &= ~ConsoleReporter::OO_Tabular;
-  }
-  return static_cast<ConsoleReporter::OutputOptions>(output_opts);
-}
-
-}  // end namespace internal
-
-size_t RunSpecifiedBenchmarks() {
-  return RunSpecifiedBenchmarks(nullptr, nullptr);
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter) {
-  return RunSpecifiedBenchmarks(display_reporter, nullptr);
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter) {
-  std::string spec = FLAGS_benchmark_filter;
-  if (spec.empty() || spec == "all")
-    spec = ".";  // Regexp that matches all benchmarks
-
-  // Setup the reporters
-  std::ofstream output_file;
-  std::unique_ptr<BenchmarkReporter> default_display_reporter;
-  std::unique_ptr<BenchmarkReporter> default_file_reporter;
-  if (!display_reporter) {
-    default_display_reporter = internal::CreateReporter(
-        FLAGS_benchmark_format, internal::GetOutputOptions());
-    display_reporter = default_display_reporter.get();
-  }
-  auto& Out = display_reporter->GetOutputStream();
-  auto& Err = display_reporter->GetErrorStream();
-
-  std::string const& fname = FLAGS_benchmark_out;
-  if (fname.empty() && file_reporter) {
-    Err << "A custom file reporter was provided but "
-           "--benchmark_out=<file> was not specified."
-        << std::endl;
-    std::exit(1);
-  }
-  if (!fname.empty()) {
-    output_file.open(fname);
-    if (!output_file.is_open()) {
-      Err << "invalid file name: '" << fname << std::endl;
-      std::exit(1);
-    }
-    if (!file_reporter) {
-      default_file_reporter = internal::CreateReporter(
-          FLAGS_benchmark_out_format, ConsoleReporter::OO_None);
-      file_reporter = default_file_reporter.get();
-    }
-    file_reporter->SetOutputStream(&output_file);
-    file_reporter->SetErrorStream(&output_file);
-  }
-
-  std::vector<internal::BenchmarkInstance> benchmarks;
-  if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) return 0;
-
-  if (benchmarks.empty()) {
-    Err << "Failed to match any benchmarks against regex: " << spec << "\n";
-    return 0;
-  }
-
-  if (FLAGS_benchmark_list_tests) {
-    for (auto const& benchmark : benchmarks) Out << benchmark.name << "\n";
-  } else {
-    internal::RunBenchmarks(benchmarks, display_reporter, file_reporter);
-  }
-
-  return benchmarks.size();
-}
-
-void RegisterMemoryManager(MemoryManager* manager) {
-  internal::memory_manager = manager;
-}
-
-namespace internal {
-
-void PrintUsageAndExit() {
-  fprintf(stdout,
-          "benchmark"
-          " [--benchmark_list_tests={true|false}]\n"
-          "          [--benchmark_filter=<regex>]\n"
-          "          [--benchmark_min_time=<min_time>]\n"
-          "          [--benchmark_repetitions=<num_repetitions>]\n"
-          "          [--benchmark_report_aggregates_only={true|false}]\n"
-          "          [--benchmark_display_aggregates_only={true|false}]\n"
-          "          [--benchmark_format=<console|json|csv>]\n"
-          "          [--benchmark_out=<filename>]\n"
-          "          [--benchmark_out_format=<json|console|csv>]\n"
-          "          [--benchmark_color={auto|true|false}]\n"
-          "          [--benchmark_counters_tabular={true|false}]\n"
-          "          [--v=<verbosity>]\n");
-  exit(0);
-}
-
-void ParseCommandLineFlags(int* argc, char** argv) {
-  using namespace benchmark;
-  BenchmarkReporter::Context::executable_name =
-      (argc && *argc > 0) ? argv[0] : "unknown";
-  for (int i = 1; i < *argc; ++i) {
-    if (ParseBoolFlag(argv[i], "benchmark_list_tests",
-                      &FLAGS_benchmark_list_tests) ||
-        ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||
-        ParseDoubleFlag(argv[i], "benchmark_min_time",
-                        &FLAGS_benchmark_min_time) ||
-        ParseInt32Flag(argv[i], "benchmark_repetitions",
-                       &FLAGS_benchmark_repetitions) ||
-        ParseBoolFlag(argv[i], "benchmark_report_aggregates_only",
-                      &FLAGS_benchmark_report_aggregates_only) ||
-        ParseBoolFlag(argv[i], "benchmark_display_aggregates_only",
-                      &FLAGS_benchmark_display_aggregates_only) ||
-        ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) ||
-        ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) ||
-        ParseStringFlag(argv[i], "benchmark_out_format",
-                        &FLAGS_benchmark_out_format) ||
-        ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) ||
-        // "color_print" is the deprecated name for "benchmark_color".
-        // TODO: Remove this.
-        ParseStringFlag(argv[i], "color_print", &FLAGS_benchmark_color) ||
-        ParseBoolFlag(argv[i], "benchmark_counters_tabular",
-                      &FLAGS_benchmark_counters_tabular) ||
-        ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
-      for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
-
-      --(*argc);
-      --i;
-    } else if (IsFlag(argv[i], "help")) {
-      PrintUsageAndExit();
-    }
-  }
-  for (auto const* flag :
-       {&FLAGS_benchmark_format, &FLAGS_benchmark_out_format})
-    if (*flag != "console" && *flag != "json" && *flag != "csv") {
-      PrintUsageAndExit();
-    }
-  if (FLAGS_benchmark_color.empty()) {
-    PrintUsageAndExit();
-  }
-}
-
-int InitializeStreams() {
-  static std::ios_base::Init init;
-  return 0;
-}
-
-}  // end namespace internal
-
-void Initialize(int* argc, char** argv) {
-  internal::ParseCommandLineFlags(argc, argv);
-  internal::LogLevel() = FLAGS_v;
-}
-
-bool ReportUnrecognizedArguments(int argc, char** argv) {
-  for (int i = 1; i < argc; ++i) {
-    fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0],
-            argv[i]);
-  }
-  return argc > 1;
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/benchmark_api_internal.cc b/third_party/google-benchmark/src/benchmark_api_internal.cc
deleted file mode 100644
index 8d31083..0000000
--- a/third_party/google-benchmark/src/benchmark_api_internal.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "benchmark_api_internal.h"
-
-namespace benchmark {
-namespace internal {
-
-State BenchmarkInstance::Run(
-    size_t iters, int thread_id, internal::ThreadTimer* timer,
-    internal::ThreadManager* manager) const {
-  State st(iters, arg, thread_id, threads, timer, manager);
-  benchmark->Run(st);
-  return st;
-}
-
-}  // internal
-}  // benchmark
diff --git a/third_party/google-benchmark/src/benchmark_api_internal.h b/third_party/google-benchmark/src/benchmark_api_internal.h
deleted file mode 100644
index 0524a85..0000000
--- a/third_party/google-benchmark/src/benchmark_api_internal.h
+++ /dev/null
@@ -1,52 +0,0 @@
-#ifndef BENCHMARK_API_INTERNAL_H
-#define BENCHMARK_API_INTERNAL_H
-
-#include "benchmark/benchmark.h"
-#include "commandlineflags.h"
-
-#include <cmath>
-#include <iosfwd>
-#include <limits>
-#include <memory>
-#include <string>
-#include <vector>
-
-namespace benchmark {
-namespace internal {
-
-// Information kept per benchmark we may want to run
-struct BenchmarkInstance {
-  std::string name;
-  Benchmark* benchmark;
-  AggregationReportMode aggregation_report_mode;
-  std::vector<int64_t> arg;
-  TimeUnit time_unit;
-  int range_multiplier;
-  bool use_real_time;
-  bool use_manual_time;
-  BigO complexity;
-  BigOFunc* complexity_lambda;
-  UserCounters counters;
-  const std::vector<Statistics>* statistics;
-  bool last_benchmark_instance;
-  int repetitions;
-  double min_time;
-  size_t iterations;
-  int threads;  // Number of concurrent threads to us
-
-  State Run(size_t iters, int thread_id, internal::ThreadTimer* timer,
-            internal::ThreadManager* manager) const;
-};
-
-bool FindBenchmarksInternal(const std::string& re,
-                            std::vector<BenchmarkInstance>* benchmarks,
-                            std::ostream* Err);
-
-bool IsZero(double n);
-
-ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color = false);
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_API_INTERNAL_H
diff --git a/third_party/google-benchmark/src/benchmark_main.cc b/third_party/google-benchmark/src/benchmark_main.cc
deleted file mode 100644
index b3b2478..0000000
--- a/third_party/google-benchmark/src/benchmark_main.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2018 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/src/benchmark_register.cc b/third_party/google-benchmark/src/benchmark_register.cc
deleted file mode 100644
index f17f5b2..0000000
--- a/third_party/google-benchmark/src/benchmark_register.cc
+++ /dev/null
@@ -1,482 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark_register.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <sstream>
-#include <thread>
-
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "check.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-namespace {
-// For non-dense Range, intermediate values are powers of kRangeMultiplier.
-static const int kRangeMultiplier = 8;
-// The size of a benchmark family determines is the number of inputs to repeat
-// the benchmark on. If this is "large" then warn the user during configuration.
-static const size_t kMaxFamilySize = 100;
-}  // end namespace
-
-namespace internal {
-
-//=============================================================================//
-//                         BenchmarkFamilies
-//=============================================================================//
-
-// Class for managing registered benchmarks.  Note that each registered
-// benchmark identifies a family of related benchmarks to run.
-class BenchmarkFamilies {
- public:
-  static BenchmarkFamilies* GetInstance();
-
-  // Registers a benchmark family and returns the index assigned to it.
-  size_t AddBenchmark(std::unique_ptr<Benchmark> family);
-
-  // Clear all registered benchmark families.
-  void ClearBenchmarks();
-
-  // Extract the list of benchmark instances that match the specified
-  // regular expression.
-  bool FindBenchmarks(std::string re,
-                      std::vector<BenchmarkInstance>* benchmarks,
-                      std::ostream* Err);
-
- private:
-  BenchmarkFamilies() {}
-
-  std::vector<std::unique_ptr<Benchmark>> families_;
-  Mutex mutex_;
-};
-
-BenchmarkFamilies* BenchmarkFamilies::GetInstance() {
-  static BenchmarkFamilies instance;
-  return &instance;
-}
-
-size_t BenchmarkFamilies::AddBenchmark(std::unique_ptr<Benchmark> family) {
-  MutexLock l(mutex_);
-  size_t index = families_.size();
-  families_.push_back(std::move(family));
-  return index;
-}
-
-void BenchmarkFamilies::ClearBenchmarks() {
-  MutexLock l(mutex_);
-  families_.clear();
-  families_.shrink_to_fit();
-}
-
-bool BenchmarkFamilies::FindBenchmarks(
-    std::string spec, std::vector<BenchmarkInstance>* benchmarks,
-    std::ostream* ErrStream) {
-  CHECK(ErrStream);
-  auto& Err = *ErrStream;
-  // Make regular expression out of command-line flag
-  std::string error_msg;
-  Regex re;
-  bool isNegativeFilter = false;
-  if (spec[0] == '-') {
-    spec.replace(0, 1, "");
-    isNegativeFilter = true;
-  }
-  if (!re.Init(spec, &error_msg)) {
-    Err << "Could not compile benchmark re: " << error_msg << std::endl;
-    return false;
-  }
-
-  // Special list of thread counts to use when none are specified
-  const std::vector<int> one_thread = {1};
-
-  MutexLock l(mutex_);
-  for (std::unique_ptr<Benchmark>& family : families_) {
-    // Family was deleted or benchmark doesn't match
-    if (!family) continue;
-
-    if (family->ArgsCnt() == -1) {
-      family->Args({});
-    }
-    const std::vector<int>* thread_counts =
-        (family->thread_counts_.empty()
-             ? &one_thread
-             : &static_cast<const std::vector<int>&>(family->thread_counts_));
-    const size_t family_size = family->args_.size() * thread_counts->size();
-    // The benchmark will be run at least 'family_size' different inputs.
-    // If 'family_size' is very large warn the user.
-    if (family_size > kMaxFamilySize) {
-      Err << "The number of inputs is very large. " << family->name_
-          << " will be repeated at least " << family_size << " times.\n";
-    }
-    // reserve in the special case the regex ".", since we know the final
-    // family size.
-    if (spec == ".") benchmarks->reserve(family_size);
-
-    for (auto const& args : family->args_) {
-      for (int num_threads : *thread_counts) {
-        BenchmarkInstance instance;
-        instance.name = family->name_;
-        instance.benchmark = family.get();
-        instance.aggregation_report_mode = family->aggregation_report_mode_;
-        instance.arg = args;
-        instance.time_unit = family->time_unit_;
-        instance.range_multiplier = family->range_multiplier_;
-        instance.min_time = family->min_time_;
-        instance.iterations = family->iterations_;
-        instance.repetitions = family->repetitions_;
-        instance.use_real_time = family->use_real_time_;
-        instance.use_manual_time = family->use_manual_time_;
-        instance.complexity = family->complexity_;
-        instance.complexity_lambda = family->complexity_lambda_;
-        instance.statistics = &family->statistics_;
-        instance.threads = num_threads;
-
-        // Add arguments to instance name
-        size_t arg_i = 0;
-        for (auto const& arg : args) {
-          instance.name += "/";
-
-          if (arg_i < family->arg_names_.size()) {
-            const auto& arg_name = family->arg_names_[arg_i];
-            if (!arg_name.empty()) {
-              instance.name +=
-                  StrFormat("%s:", family->arg_names_[arg_i].c_str());
-            }
-          }
-
-          // we know that the args are always non-negative (see 'AddRange()'),
-          // thus print as 'unsigned'. BUT, do a cast due to the 32-bit builds.
-          instance.name += StrFormat("%lu", static_cast<unsigned long>(arg));
-          ++arg_i;
-        }
-
-        if (!IsZero(family->min_time_))
-          instance.name += StrFormat("/min_time:%0.3f", family->min_time_);
-        if (family->iterations_ != 0) {
-          instance.name +=
-              StrFormat("/iterations:%lu",
-                        static_cast<unsigned long>(family->iterations_));
-        }
-        if (family->repetitions_ != 0)
-          instance.name += StrFormat("/repeats:%d", family->repetitions_);
-
-        if (family->use_manual_time_) {
-          instance.name += "/manual_time";
-        } else if (family->use_real_time_) {
-          instance.name += "/real_time";
-        }
-
-        // Add the number of threads used to the name
-        if (!family->thread_counts_.empty()) {
-          instance.name += StrFormat("/threads:%d", instance.threads);
-        }
-
-        if ((re.Match(instance.name) && !isNegativeFilter) ||
-            (!re.Match(instance.name) && isNegativeFilter)) {
-          instance.last_benchmark_instance = (&args == &family->args_.back());
-          benchmarks->push_back(std::move(instance));
-        }
-      }
-    }
-  }
-  return true;
-}
-
-Benchmark* RegisterBenchmarkInternal(Benchmark* bench) {
-  std::unique_ptr<Benchmark> bench_ptr(bench);
-  BenchmarkFamilies* families = BenchmarkFamilies::GetInstance();
-  families->AddBenchmark(std::move(bench_ptr));
-  return bench;
-}
-
-// FIXME: This function is a hack so that benchmark.cc can access
-// `BenchmarkFamilies`
-bool FindBenchmarksInternal(const std::string& re,
-                            std::vector<BenchmarkInstance>* benchmarks,
-                            std::ostream* Err) {
-  return BenchmarkFamilies::GetInstance()->FindBenchmarks(re, benchmarks, Err);
-}
-
-//=============================================================================//
-//                               Benchmark
-//=============================================================================//
-
-Benchmark::Benchmark(const char* name)
-    : name_(name),
-      aggregation_report_mode_(ARM_Unspecified),
-      time_unit_(kNanosecond),
-      range_multiplier_(kRangeMultiplier),
-      min_time_(0),
-      iterations_(0),
-      repetitions_(0),
-      use_real_time_(false),
-      use_manual_time_(false),
-      complexity_(oNone),
-      complexity_lambda_(nullptr) {
-  ComputeStatistics("mean", StatisticsMean);
-  ComputeStatistics("median", StatisticsMedian);
-  ComputeStatistics("stddev", StatisticsStdDev);
-}
-
-Benchmark::~Benchmark() {}
-
-Benchmark* Benchmark::Arg(int64_t x) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  args_.push_back({x});
-  return this;
-}
-
-Benchmark* Benchmark::Unit(TimeUnit unit) {
-  time_unit_ = unit;
-  return this;
-}
-
-Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  std::vector<int64_t> arglist;
-  AddRange(&arglist, start, limit, range_multiplier_);
-
-  for (int64_t i : arglist) {
-    args_.push_back({i});
-  }
-  return this;
-}
-
-Benchmark* Benchmark::Ranges(
-    const std::vector<std::pair<int64_t, int64_t>>& ranges) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
-  std::vector<std::vector<int64_t>> arglists(ranges.size());
-  std::size_t total = 1;
-  for (std::size_t i = 0; i < ranges.size(); i++) {
-    AddRange(&arglists[i], ranges[i].first, ranges[i].second,
-             range_multiplier_);
-    total *= arglists[i].size();
-  }
-
-  std::vector<std::size_t> ctr(arglists.size(), 0);
-
-  for (std::size_t i = 0; i < total; i++) {
-    std::vector<int64_t> tmp;
-    tmp.reserve(arglists.size());
-
-    for (std::size_t j = 0; j < arglists.size(); j++) {
-      tmp.push_back(arglists[j].at(ctr[j]));
-    }
-
-    args_.push_back(std::move(tmp));
-
-    for (std::size_t j = 0; j < arglists.size(); j++) {
-      if (ctr[j] + 1 < arglists[j].size()) {
-        ++ctr[j];
-        break;
-      }
-      ctr[j] = 0;
-    }
-  }
-  return this;
-}
-
-Benchmark* Benchmark::ArgName(const std::string& name) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  arg_names_ = {name};
-  return this;
-}
-
-Benchmark* Benchmark::ArgNames(const std::vector<std::string>& names) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(names.size()));
-  arg_names_ = names;
-  return this;
-}
-
-Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  CHECK_GE(start, 0);
-  CHECK_LE(start, limit);
-  for (int64_t arg = start; arg <= limit; arg += step) {
-    args_.push_back({arg});
-  }
-  return this;
-}
-
-Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
-  args_.push_back(args);
-  return this;
-}
-
-Benchmark* Benchmark::Apply(void (*custom_arguments)(Benchmark* benchmark)) {
-  custom_arguments(this);
-  return this;
-}
-
-Benchmark* Benchmark::RangeMultiplier(int multiplier) {
-  CHECK(multiplier > 1);
-  range_multiplier_ = multiplier;
-  return this;
-}
-
-Benchmark* Benchmark::MinTime(double t) {
-  CHECK(t > 0.0);
-  CHECK(iterations_ == 0);
-  min_time_ = t;
-  return this;
-}
-
-Benchmark* Benchmark::Iterations(size_t n) {
-  CHECK(n > 0);
-  CHECK(IsZero(min_time_));
-  iterations_ = n;
-  return this;
-}
-
-Benchmark* Benchmark::Repetitions(int n) {
-  CHECK(n > 0);
-  repetitions_ = n;
-  return this;
-}
-
-Benchmark* Benchmark::ReportAggregatesOnly(bool value) {
-  aggregation_report_mode_ = value ? ARM_ReportAggregatesOnly : ARM_Default;
-  return this;
-}
-
-Benchmark* Benchmark::DisplayAggregatesOnly(bool value) {
-  // If we were called, the report mode is no longer 'unspecified', in any case.
-  aggregation_report_mode_ = static_cast<AggregationReportMode>(
-      aggregation_report_mode_ | ARM_Default);
-
-  if (value) {
-    aggregation_report_mode_ = static_cast<AggregationReportMode>(
-        aggregation_report_mode_ | ARM_DisplayReportAggregatesOnly);
-  } else {
-    aggregation_report_mode_ = static_cast<AggregationReportMode>(
-        aggregation_report_mode_ & ~ARM_DisplayReportAggregatesOnly);
-  }
-
-  return this;
-}
-
-Benchmark* Benchmark::UseRealTime() {
-  CHECK(!use_manual_time_)
-      << "Cannot set UseRealTime and UseManualTime simultaneously.";
-  use_real_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::UseManualTime() {
-  CHECK(!use_real_time_)
-      << "Cannot set UseRealTime and UseManualTime simultaneously.";
-  use_manual_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::Complexity(BigO complexity) {
-  complexity_ = complexity;
-  return this;
-}
-
-Benchmark* Benchmark::Complexity(BigOFunc* complexity) {
-  complexity_lambda_ = complexity;
-  complexity_ = oLambda;
-  return this;
-}
-
-Benchmark* Benchmark::ComputeStatistics(std::string name,
-                                        StatisticsFunc* statistics) {
-  statistics_.emplace_back(name, statistics);
-  return this;
-}
-
-Benchmark* Benchmark::Threads(int t) {
-  CHECK_GT(t, 0);
-  thread_counts_.push_back(t);
-  return this;
-}
-
-Benchmark* Benchmark::ThreadRange(int min_threads, int max_threads) {
-  CHECK_GT(min_threads, 0);
-  CHECK_GE(max_threads, min_threads);
-
-  AddRange(&thread_counts_, min_threads, max_threads, 2);
-  return this;
-}
-
-Benchmark* Benchmark::DenseThreadRange(int min_threads, int max_threads,
-                                       int stride) {
-  CHECK_GT(min_threads, 0);
-  CHECK_GE(max_threads, min_threads);
-  CHECK_GE(stride, 1);
-
-  for (auto i = min_threads; i < max_threads; i += stride) {
-    thread_counts_.push_back(i);
-  }
-  thread_counts_.push_back(max_threads);
-  return this;
-}
-
-Benchmark* Benchmark::ThreadPerCpu() {
-  thread_counts_.push_back(CPUInfo::Get().num_cpus);
-  return this;
-}
-
-void Benchmark::SetName(const char* name) { name_ = name; }
-
-int Benchmark::ArgsCnt() const {
-  if (args_.empty()) {
-    if (arg_names_.empty()) return -1;
-    return static_cast<int>(arg_names_.size());
-  }
-  return static_cast<int>(args_.front().size());
-}
-
-//=============================================================================//
-//                            FunctionBenchmark
-//=============================================================================//
-
-void FunctionBenchmark::Run(State& st) { func_(st); }
-
-}  // end namespace internal
-
-void ClearRegisteredBenchmarks() {
-  internal::BenchmarkFamilies::GetInstance()->ClearBenchmarks();
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/benchmark_register.h b/third_party/google-benchmark/src/benchmark_register.h
deleted file mode 100644
index 0705e21..0000000
--- a/third_party/google-benchmark/src/benchmark_register.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_REGISTER_H
-#define BENCHMARK_REGISTER_H
-
-#include <vector>
-
-#include "check.h"
-
-template <typename T>
-void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
-  CHECK_GE(lo, 0);
-  CHECK_GE(hi, lo);
-  CHECK_GE(mult, 2);
-
-  // Add "lo"
-  dst->push_back(lo);
-
-  static const T kmax = std::numeric_limits<T>::max();
-
-  // Now space out the benchmarks in multiples of "mult"
-  for (T i = 1; i < kmax / mult; i *= mult) {
-    if (i >= hi) break;
-    if (i > lo) {
-      dst->push_back(i);
-    }
-  }
-
-  // Add "hi" (if different from "lo")
-  if (hi != lo) {
-    dst->push_back(hi);
-  }
-}
-
-#endif  // BENCHMARK_REGISTER_H
diff --git a/third_party/google-benchmark/src/benchmark_runner.cc b/third_party/google-benchmark/src/benchmark_runner.cc
deleted file mode 100644
index 38faeec..0000000
--- a/third_party/google-benchmark/src/benchmark_runner.cc
+++ /dev/null
@@ -1,350 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark_runner.h"
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "thread_manager.h"
-#include "thread_timer.h"
-
-namespace benchmark {
-
-namespace internal {
-
-MemoryManager* memory_manager = nullptr;
-
-namespace {
-
-static const size_t kMaxIterations = 1000000000;
-
-BenchmarkReporter::Run CreateRunReport(
-    const benchmark::internal::BenchmarkInstance& b,
-    const internal::ThreadManager::Result& results, size_t memory_iterations,
-    const MemoryManager::Result& memory_result, double seconds) {
-  // Create report about this benchmark run.
-  BenchmarkReporter::Run report;
-
-  report.run_name = b.name;
-  report.error_occurred = results.has_error_;
-  report.error_message = results.error_message_;
-  report.report_label = results.report_label_;
-  // This is the total iterations across all threads.
-  report.iterations = results.iterations;
-  report.time_unit = b.time_unit;
-
-  if (!report.error_occurred) {
-    if (b.use_manual_time) {
-      report.real_accumulated_time = results.manual_time_used;
-    } else {
-      report.real_accumulated_time = results.real_time_used;
-    }
-    report.cpu_accumulated_time = results.cpu_time_used;
-    report.complexity_n = results.complexity_n;
-    report.complexity = b.complexity;
-    report.complexity_lambda = b.complexity_lambda;
-    report.statistics = b.statistics;
-    report.counters = results.counters;
-
-    if (memory_iterations > 0) {
-      report.has_memory_result = true;
-      report.allocs_per_iter =
-          memory_iterations ? static_cast<double>(memory_result.num_allocs) /
-                                  memory_iterations
-                            : 0;
-      report.max_bytes_used = memory_result.max_bytes_used;
-    }
-
-    internal::Finish(&report.counters, results.iterations, seconds, b.threads);
-  }
-  return report;
-}
-
-// Execute one thread of benchmark b for the specified number of iterations.
-// Adds the stats collected for the thread into *total.
-void RunInThread(const BenchmarkInstance* b, size_t iters, int thread_id,
-                 ThreadManager* manager) {
-  internal::ThreadTimer timer;
-  State st = b->Run(iters, thread_id, &timer, manager);
-  CHECK(st.iterations() >= st.max_iterations)
-      << "Benchmark returned before State::KeepRunning() returned false!";
-  {
-    MutexLock l(manager->GetBenchmarkMutex());
-    internal::ThreadManager::Result& results = manager->results;
-    results.iterations += st.iterations();
-    results.cpu_time_used += timer.cpu_time_used();
-    results.real_time_used += timer.real_time_used();
-    results.manual_time_used += timer.manual_time_used();
-    results.complexity_n += st.complexity_length_n();
-    internal::Increment(&results.counters, st.counters);
-  }
-  manager->NotifyThreadComplete();
-}
-
-class BenchmarkRunner {
- public:
-  BenchmarkRunner(const benchmark::internal::BenchmarkInstance& b_,
-                  std::vector<BenchmarkReporter::Run>* complexity_reports_)
-      : b(b_),
-        complexity_reports(*complexity_reports_),
-        min_time(!IsZero(b.min_time) ? b.min_time : FLAGS_benchmark_min_time),
-        repeats(b.repetitions != 0 ? b.repetitions
-                                   : FLAGS_benchmark_repetitions),
-        has_explicit_iteration_count(b.iterations != 0),
-        pool(b.threads - 1),
-        iters(has_explicit_iteration_count ? b.iterations : 1) {
-    run_results.display_report_aggregates_only =
-        (FLAGS_benchmark_report_aggregates_only ||
-         FLAGS_benchmark_display_aggregates_only);
-    run_results.file_report_aggregates_only =
-        FLAGS_benchmark_report_aggregates_only;
-    if (b.aggregation_report_mode != internal::ARM_Unspecified) {
-      run_results.display_report_aggregates_only =
-          (b.aggregation_report_mode &
-           internal::ARM_DisplayReportAggregatesOnly);
-      run_results.file_report_aggregates_only =
-          (b.aggregation_report_mode & internal::ARM_FileReportAggregatesOnly);
-    }
-
-    for (int repetition_num = 0; repetition_num < repeats; repetition_num++) {
-      const bool is_the_first_repetition = repetition_num == 0;
-      DoOneRepetition(is_the_first_repetition);
-    }
-
-    // Calculate additional statistics
-    run_results.aggregates_only = ComputeStats(run_results.non_aggregates);
-
-    // Maybe calculate complexity report
-    if ((b.complexity != oNone) && b.last_benchmark_instance) {
-      auto additional_run_stats = ComputeBigO(complexity_reports);
-      run_results.aggregates_only.insert(run_results.aggregates_only.end(),
-                                         additional_run_stats.begin(),
-                                         additional_run_stats.end());
-      complexity_reports.clear();
-    }
-  }
-
-  RunResults&& get_results() { return std::move(run_results); }
-
- private:
-  RunResults run_results;
-
-  const benchmark::internal::BenchmarkInstance& b;
-  std::vector<BenchmarkReporter::Run>& complexity_reports;
-
-  const double min_time;
-  const int repeats;
-  const bool has_explicit_iteration_count;
-
-  std::vector<std::thread> pool;
-
-  size_t iters;  // preserved between repetitions!
-  // So only the first repetition has to find/calculate it,
-  // the other repetitions will just use that precomputed iteration count.
-
-  struct IterationResults {
-    internal::ThreadManager::Result results;
-    size_t iters;
-    double seconds;
-  };
-  IterationResults DoNIterations() {
-    VLOG(2) << "Running " << b.name << " for " << iters << "\n";
-
-    std::unique_ptr<internal::ThreadManager> manager;
-    manager.reset(new internal::ThreadManager(b.threads));
-
-    // Run all but one thread in separate threads
-    for (std::size_t ti = 0; ti < pool.size(); ++ti) {
-      pool[ti] = std::thread(&RunInThread, &b, iters, static_cast<int>(ti + 1),
-                             manager.get());
-    }
-    // And run one thread here directly.
-    // (If we were asked to run just one thread, we don't create new threads.)
-    // Yes, we need to do this here *after* we start the separate threads.
-    RunInThread(&b, iters, 0, manager.get());
-
-    // The main thread has finished. Now let's wait for the other threads.
-    manager->WaitForAllThreads();
-    for (std::thread& thread : pool) thread.join();
-
-    IterationResults i;
-    // Acquire the measurements/counters from the manager, UNDER THE LOCK!
-    {
-      MutexLock l(manager->GetBenchmarkMutex());
-      i.results = manager->results;
-    }
-
-    // And get rid of the manager.
-    manager.reset();
-
-    // Adjust real/manual time stats since they were reported per thread.
-    i.results.real_time_used /= b.threads;
-    i.results.manual_time_used /= b.threads;
-
-    VLOG(2) << "Ran in " << i.results.cpu_time_used << "/"
-            << i.results.real_time_used << "\n";
-
-    // So for how long were we running?
-    i.iters = iters;
-    // Base decisions off of real time if requested by this benchmark.
-    i.seconds = i.results.cpu_time_used;
-    if (b.use_manual_time) {
-      i.seconds = i.results.manual_time_used;
-    } else if (b.use_real_time) {
-      i.seconds = i.results.real_time_used;
-    }
-
-    return i;
-  }
-
-  size_t PredictNumItersNeeded(const IterationResults& i) const {
-    // See how much iterations should be increased by.
-    // Note: Avoid division by zero with max(seconds, 1ns).
-    double multiplier = min_time * 1.4 / std::max(i.seconds, 1e-9);
-    // If our last run was at least 10% of FLAGS_benchmark_min_time then we
-    // use the multiplier directly.
-    // Otherwise we use at most 10 times expansion.
-    // NOTE: When the last run was at least 10% of the min time the max
-    // expansion should be 14x.
-    bool is_significant = (i.seconds / min_time) > 0.1;
-    multiplier = is_significant ? multiplier : std::min(10.0, multiplier);
-    if (multiplier <= 1.0) multiplier = 2.0;
-
-    // So what seems to be the sufficiently-large iteration count? Round up.
-    const size_t max_next_iters =
-        0.5 + std::max(multiplier * i.iters, i.iters + 1.0);
-    // But we do have *some* sanity limits though..
-    const size_t next_iters = std::min(max_next_iters, kMaxIterations);
-
-    VLOG(3) << "Next iters: " << next_iters << ", " << multiplier << "\n";
-    return next_iters;  // round up before conversion to integer.
-  }
-
-  bool ShouldReportIterationResults(const IterationResults& i) const {
-    // Determine if this run should be reported;
-    // Either it has run for a sufficient amount of time
-    // or because an error was reported.
-    return i.results.has_error_ ||
-           i.iters >= kMaxIterations ||  // Too many iterations already.
-           i.seconds >= min_time ||      // The elapsed time is large enough.
-           // CPU time is specified but the elapsed real time greatly exceeds
-           // the minimum time.
-           // Note that user provided timers are except from this sanity check.
-           ((i.results.real_time_used >= 5 * min_time) && !b.use_manual_time);
-  }
-
-  void DoOneRepetition(bool is_the_first_repetition) {
-    IterationResults i;
-
-    // We *may* be gradually increasing the length (iteration count)
-    // of the benchmark until we decide the results are significant.
-    // And once we do, we report those last results and exit.
-    // Please do note that the if there are repetitions, the iteration count
-    // is *only* calculated for the *first* repetition, and other repetitions
-    // simply use that precomputed iteration count.
-    for (;;) {
-      i = DoNIterations();
-
-      // Do we consider the results to be significant?
-      // If we are doing repetitions, and the first repetition was already done,
-      // it has calculated the correct iteration time, so we have run that very
-      // iteration count just now. No need to calculate anything. Just report.
-      // Else, the normal rules apply.
-      const bool results_are_significant = !is_the_first_repetition ||
-                                           has_explicit_iteration_count ||
-                                           ShouldReportIterationResults(i);
-
-      if (results_are_significant) break;  // Good, let's report them!
-
-      // Nope, bad iteration. Let's re-estimate the hopefully-sufficient
-      // iteration count, and run the benchmark again...
-
-      iters = PredictNumItersNeeded(i);
-      assert(iters > i.iters &&
-             "if we did more iterations than we want to do the next time, "
-             "then we should have accepted the current iteration run.");
-    }
-
-    // Oh, one last thing, we need to also produce the 'memory measurements'..
-    MemoryManager::Result memory_result;
-    size_t memory_iterations = 0;
-    if (memory_manager != nullptr) {
-      // Only run a few iterations to reduce the impact of one-time
-      // allocations in benchmarks that are not properly managed.
-      memory_iterations = std::min<size_t>(16, iters);
-      memory_manager->Start();
-      std::unique_ptr<internal::ThreadManager> manager;
-      manager.reset(new internal::ThreadManager(1));
-      RunInThread(&b, memory_iterations, 0, manager.get());
-      manager->WaitForAllThreads();
-      manager.reset();
-
-      memory_manager->Stop(&memory_result);
-    }
-
-    // Ok, now actualy report.
-    BenchmarkReporter::Run report = CreateRunReport(
-        b, i.results, memory_iterations, memory_result, i.seconds);
-
-    if (!report.error_occurred && b.complexity != oNone)
-      complexity_reports.push_back(report);
-
-    run_results.non_aggregates.push_back(report);
-  }
-};
-
-}  // end namespace
-
-RunResults RunBenchmark(
-    const benchmark::internal::BenchmarkInstance& b,
-    std::vector<BenchmarkReporter::Run>* complexity_reports) {
-  internal::BenchmarkRunner r(b, complexity_reports);
-  return r.get_results();
-}
-
-}  // end namespace internal
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/benchmark_runner.h b/third_party/google-benchmark/src/benchmark_runner.h
deleted file mode 100644
index 96e8282..0000000
--- a/third_party/google-benchmark/src/benchmark_runner.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_RUNNER_H_
-#define BENCHMARK_RUNNER_H_
-
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
-
-DECLARE_double(benchmark_min_time);
-
-DECLARE_int32(benchmark_repetitions);
-
-DECLARE_bool(benchmark_report_aggregates_only);
-
-DECLARE_bool(benchmark_display_aggregates_only);
-
-namespace benchmark {
-
-namespace internal {
-
-extern MemoryManager* memory_manager;
-
-struct RunResults {
-  std::vector<BenchmarkReporter::Run> non_aggregates;
-  std::vector<BenchmarkReporter::Run> aggregates_only;
-
-  bool display_report_aggregates_only = false;
-  bool file_report_aggregates_only = false;
-};
-
-RunResults RunBenchmark(
-    const benchmark::internal::BenchmarkInstance& b,
-    std::vector<BenchmarkReporter::Run>* complexity_reports);
-
-}  // namespace internal
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_RUNNER_H_
diff --git a/third_party/google-benchmark/src/check.h b/third_party/google-benchmark/src/check.h
deleted file mode 100644
index f5f8253..0000000
--- a/third_party/google-benchmark/src/check.h
+++ /dev/null
@@ -1,82 +0,0 @@
-#ifndef CHECK_H_
-#define CHECK_H_
-
-#include <cmath>
-#include <cstdlib>
-#include <ostream>
-
-#include "internal_macros.h"
-#include "log.h"
-
-namespace benchmark {
-namespace internal {
-
-typedef void(AbortHandlerT)();
-
-inline AbortHandlerT*& GetAbortHandler() {
-  static AbortHandlerT* handler = &std::abort;
-  return handler;
-}
-
-BENCHMARK_NORETURN inline void CallAbortHandler() {
-  GetAbortHandler()();
-  std::abort();  // fallback to enforce noreturn
-}
-
-// CheckHandler is the class constructed by failing CHECK macros. CheckHandler
-// will log information about the failures and abort when it is destructed.
-class CheckHandler {
- public:
-  CheckHandler(const char* check, const char* file, const char* func, int line)
-      : log_(GetErrorLogInstance()) {
-    log_ << file << ":" << line << ": " << func << ": Check `" << check
-         << "' failed. ";
-  }
-
-  LogType& GetLog() { return log_; }
-
-  BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
-    log_ << std::endl;
-    CallAbortHandler();
-  }
-
-  CheckHandler& operator=(const CheckHandler&) = delete;
-  CheckHandler(const CheckHandler&) = delete;
-  CheckHandler() = delete;
-
- private:
-  LogType& log_;
-};
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-// The CHECK macro returns a std::ostream object that can have extra information
-// written to it.
-#ifndef NDEBUG
-#define CHECK(b)                                                             \
-  (b ? ::benchmark::internal::GetNullLogInstance()                           \
-     : ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
-           .GetLog())
-#else
-#define CHECK(b) ::benchmark::internal::GetNullLogInstance()
-#endif
-
-// clang-format off
-// preserve whitespacing between operators for alignment
-#define CHECK_EQ(a, b) CHECK((a) == (b))
-#define CHECK_NE(a, b) CHECK((a) != (b))
-#define CHECK_GE(a, b) CHECK((a) >= (b))
-#define CHECK_LE(a, b) CHECK((a) <= (b))
-#define CHECK_GT(a, b) CHECK((a) > (b))
-#define CHECK_LT(a, b) CHECK((a) < (b))
-
-#define CHECK_FLOAT_EQ(a, b, eps) CHECK(std::fabs((a) - (b)) <  (eps))
-#define CHECK_FLOAT_NE(a, b, eps) CHECK(std::fabs((a) - (b)) >= (eps))
-#define CHECK_FLOAT_GE(a, b, eps) CHECK((a) - (b) > -(eps))
-#define CHECK_FLOAT_LE(a, b, eps) CHECK((b) - (a) > -(eps))
-#define CHECK_FLOAT_GT(a, b, eps) CHECK((a) - (b) >  (eps))
-#define CHECK_FLOAT_LT(a, b, eps) CHECK((b) - (a) >  (eps))
-//clang-format on
-
-#endif  // CHECK_H_
diff --git a/third_party/google-benchmark/src/colorprint.cc b/third_party/google-benchmark/src/colorprint.cc
deleted file mode 100644
index fff6a98..0000000
--- a/third_party/google-benchmark/src/colorprint.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "colorprint.h"
-
-#include <cstdarg>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <memory>
-#include <string>
-
-#include "check.h"
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <windows.h>
-#include <io.h>
-#else
-#include <unistd.h>
-#endif  // BENCHMARK_OS_WINDOWS
-
-namespace benchmark {
-namespace {
-#ifdef BENCHMARK_OS_WINDOWS
-typedef WORD PlatformColorCode;
-#else
-typedef const char* PlatformColorCode;
-#endif
-
-PlatformColorCode GetPlatformColorCode(LogColor color) {
-#ifdef BENCHMARK_OS_WINDOWS
-  switch (color) {
-    case COLOR_RED:
-      return FOREGROUND_RED;
-    case COLOR_GREEN:
-      return FOREGROUND_GREEN;
-    case COLOR_YELLOW:
-      return FOREGROUND_RED | FOREGROUND_GREEN;
-    case COLOR_BLUE:
-      return FOREGROUND_BLUE;
-    case COLOR_MAGENTA:
-      return FOREGROUND_BLUE | FOREGROUND_RED;
-    case COLOR_CYAN:
-      return FOREGROUND_BLUE | FOREGROUND_GREEN;
-    case COLOR_WHITE:  // fall through to default
-    default:
-      return 0;
-  }
-#else
-  switch (color) {
-    case COLOR_RED:
-      return "1";
-    case COLOR_GREEN:
-      return "2";
-    case COLOR_YELLOW:
-      return "3";
-    case COLOR_BLUE:
-      return "4";
-    case COLOR_MAGENTA:
-      return "5";
-    case COLOR_CYAN:
-      return "6";
-    case COLOR_WHITE:
-      return "7";
-    default:
-      return nullptr;
-  };
-#endif
-}
-
-}  // end namespace
-
-std::string FormatString(const char* msg, va_list args) {
-  // we might need a second shot at this, so pre-emptivly make a copy
-  va_list args_cp;
-  va_copy(args_cp, args);
-
-  std::size_t size = 256;
-  char local_buff[256];
-  auto ret = vsnprintf(local_buff, size, msg, args_cp);
-
-  va_end(args_cp);
-
-  // currently there is no error handling for failure, so this is hack.
-  CHECK(ret >= 0);
-
-  if (ret == 0)  // handle empty expansion
-    return {};
-  else if (static_cast<size_t>(ret) < size)
-    return local_buff;
-  else {
-    // we did not provide a long enough buffer on our first attempt.
-    size = (size_t)ret + 1;  // + 1 for the null byte
-    std::unique_ptr<char[]> buff(new char[size]);
-    ret = vsnprintf(buff.get(), size, msg, args);
-    CHECK(ret > 0 && ((size_t)ret) < size);
-    return buff.get();
-  }
-}
-
-std::string FormatString(const char* msg, ...) {
-  va_list args;
-  va_start(args, msg);
-  auto tmp = FormatString(msg, args);
-  va_end(args);
-  return tmp;
-}
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-  ColorPrintf(out, color, fmt, args);
-  va_end(args);
-}
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
-                 va_list args) {
-#ifdef BENCHMARK_OS_WINDOWS
-  ((void)out);  // suppress unused warning
-
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle,
-                          GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  const char* color_code = GetPlatformColorCode(color);
-  if (color_code) out << FormatString("\033[0;3%sm", color_code);
-  out << FormatString(fmt, args) << "\033[m";
-#endif
-}
-
-bool IsColorTerminal() {
-#if BENCHMARK_OS_WINDOWS
-  // On Windows the TERM variable is usually not set, but the
-  // console there does support colors.
-  return 0 != _isatty(_fileno(stdout));
-#else
-  // On non-Windows platforms, we rely on the TERM variable. This list of
-  // supported TERM values is copied from Google Test:
-  // <https://github.com/google/googletest/blob/master/googletest/src/gtest.cc#L2925>.
-  const char* const SUPPORTED_TERM_VALUES[] = {
-      "xterm",         "xterm-color",     "xterm-256color",
-      "screen",        "screen-256color", "tmux",
-      "tmux-256color", "rxvt-unicode",    "rxvt-unicode-256color",
-      "linux",         "cygwin",
-  };
-
-  const char* const term = getenv("TERM");
-
-  bool term_supports_color = false;
-  for (const char* candidate : SUPPORTED_TERM_VALUES) {
-    if (term && 0 == strcmp(term, candidate)) {
-      term_supports_color = true;
-      break;
-    }
-  }
-
-  return 0 != isatty(fileno(stdout)) && term_supports_color;
-#endif  // BENCHMARK_OS_WINDOWS
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/colorprint.h b/third_party/google-benchmark/src/colorprint.h
deleted file mode 100644
index 9f6fab9..0000000
--- a/third_party/google-benchmark/src/colorprint.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_COLORPRINT_H_
-#define BENCHMARK_COLORPRINT_H_
-
-#include <cstdarg>
-#include <iostream>
-#include <string>
-
-namespace benchmark {
-enum LogColor {
-  COLOR_DEFAULT,
-  COLOR_RED,
-  COLOR_GREEN,
-  COLOR_YELLOW,
-  COLOR_BLUE,
-  COLOR_MAGENTA,
-  COLOR_CYAN,
-  COLOR_WHITE
-};
-
-std::string FormatString(const char* msg, va_list args);
-std::string FormatString(const char* msg, ...);
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
-                 va_list args);
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...);
-
-// Returns true if stdout appears to be a terminal that supports colored
-// output, false otherwise.
-bool IsColorTerminal();
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COLORPRINT_H_
diff --git a/third_party/google-benchmark/src/commandlineflags.cc b/third_party/google-benchmark/src/commandlineflags.cc
deleted file mode 100644
index 734e88b..0000000
--- a/third_party/google-benchmark/src/commandlineflags.cc
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "commandlineflags.h"
-
-#include <cctype>
-#include <cstdlib>
-#include <cstring>
-#include <iostream>
-#include <limits>
-
-namespace benchmark {
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    std::cerr << src_text << " is expected to be a 32-bit integer, "
-              << "but actually has value \"" << str << "\".\n";
-    return false;
-  }
-
-  // Is the parsed value in the range of an Int32?
-  const int32_t result = static_cast<int32_t>(long_value);
-  if (long_value == std::numeric_limits<long>::max() ||
-      long_value == std::numeric_limits<long>::min() ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an Int32.
-  ) {
-    std::cerr << src_text << " is expected to be a 32-bit integer, "
-              << "but actually has value \"" << str << "\", "
-              << "which overflows.\n";
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Parses 'str' for a double.  If successful, writes the result to *value and
-// returns true; otherwise leaves *value unchanged and returns false.
-bool ParseDouble(const std::string& src_text, const char* str, double* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const double double_value = strtod(str, &end);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    std::cerr << src_text << " is expected to be a double, "
-              << "but actually has value \"" << str << "\".\n";
-    return false;
-  }
-
-  *value = double_value;
-  return true;
-}
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "BENCHMARK_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string flag_str(flag);
-
-  std::string env_var;
-  for (size_t i = 0; i != flag_str.length(); ++i)
-    env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
-
-  return "BENCHMARK_" + env_var;
-}
-
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true iff it's not "0".
-bool BoolFromEnv(const char* flag, bool default_value) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = getenv(env_var.c_str());
-  return string_value == nullptr ? default_value
-                                 : strcmp(string_value, "0") != 0;
-}
-
-// Reads and returns a 32-bit integer stored in the environment
-// variable corresponding to the given flag; if it isn't set or
-// doesn't represent a valid 32-bit integer, returns default_value.
-int32_t Int32FromEnv(const char* flag, int32_t default_value) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = getenv(env_var.c_str());
-  if (string_value == nullptr) {
-    // The environment variable is not set.
-    return default_value;
-  }
-
-  int32_t result = default_value;
-  if (!ParseInt32(std::string("Environment variable ") + env_var, string_value,
-                  &result)) {
-    std::cout << "The default value " << default_value << " is used.\n";
-    return default_value;
-  }
-
-  return result;
-}
-
-// Reads and returns the string environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-const char* StringFromEnv(const char* flag, const char* default_value) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = getenv(env_var.c_str());
-  return value == nullptr ? default_value : value;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or nullptr if the parsing failed.
-const char* ParseFlagValue(const char* str, const char* flag,
-                           bool def_optional) {
-  // str and flag must not be nullptr.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--".
-  const std::string flag_str = std::string("--") + std::string(flag);
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) return flag_end;
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = IsTruthyFlagValue(value_str);
-  return true;
-}
-
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(std::string("The value of flag --") + flag, value_str,
-                    value);
-}
-
-bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseDouble(std::string("The value of flag --") + flag, value_str,
-                     value);
-}
-
-bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  *value = value_str;
-  return true;
-}
-
-bool IsFlag(const char* str, const char* flag) {
-  return (ParseFlagValue(str, flag, true) != nullptr);
-}
-
-bool IsTruthyFlagValue(const std::string& value) {
-  if (value.empty()) return true;
-  char ch = value[0];
-  return isalnum(ch) &&
-         !(ch == '0' || ch == 'f' || ch == 'F' || ch == 'n' || ch == 'N');
-}
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/commandlineflags.h b/third_party/google-benchmark/src/commandlineflags.h
deleted file mode 100644
index 945c9a9..0000000
--- a/third_party/google-benchmark/src/commandlineflags.h
+++ /dev/null
@@ -1,79 +0,0 @@
-#ifndef BENCHMARK_COMMANDLINEFLAGS_H_
-#define BENCHMARK_COMMANDLINEFLAGS_H_
-
-#include <cstdint>
-#include <string>
-
-// Macro for referencing flags.
-#define FLAG(name) FLAGS_##name
-
-// Macros for declaring flags.
-#define DECLARE_bool(name) extern bool FLAG(name)
-#define DECLARE_int32(name) extern int32_t FLAG(name)
-#define DECLARE_int64(name) extern int64_t FLAG(name)
-#define DECLARE_double(name) extern double FLAG(name)
-#define DECLARE_string(name) extern std::string FLAG(name)
-
-// Macros for defining flags.
-#define DEFINE_bool(name, default_val, doc) bool FLAG(name) = (default_val)
-#define DEFINE_int32(name, default_val, doc) int32_t FLAG(name) = (default_val)
-#define DEFINE_int64(name, default_val, doc) int64_t FLAG(name) = (default_val)
-#define DEFINE_double(name, default_val, doc) double FLAG(name) = (default_val)
-#define DEFINE_string(name, default_val, doc) \
-  std::string FLAG(name) = (default_val)
-
-namespace benchmark {
-// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
-// to *value and returns true; otherwise leaves *value unchanged and returns
-// false.
-bool ParseInt32(const std::string& src_text, const char* str, int32_t* value);
-
-// Parses a bool/Int32/string from the environment variable
-// corresponding to the given Google Test flag.
-bool BoolFromEnv(const char* flag, bool default_val);
-int32_t Int32FromEnv(const char* flag, int32_t default_val);
-double DoubleFromEnv(const char* flag, double default_val);
-const char* StringFromEnv(const char* flag, const char* default_val);
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true if it passes IsTruthyValue().
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseBoolFlag(const char* str, const char* flag, bool* value);
-
-// Parses a string for an Int32 flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value);
-
-// Parses a string for a Double flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseDoubleFlag(const char* str, const char* flag, double* value);
-
-// Parses a string for a string flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseStringFlag(const char* str, const char* flag, std::string* value);
-
-// Returns true if the string matches the flag.
-bool IsFlag(const char* str, const char* flag);
-
-// Returns true unless value starts with one of: '0', 'f', 'F', 'n' or 'N', or
-// some non-alphanumeric character. As a special case, also returns true if
-// value is the empty string.
-bool IsTruthyFlagValue(const std::string& value);
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COMMANDLINEFLAGS_H_
diff --git a/third_party/google-benchmark/src/complexity.cc b/third_party/google-benchmark/src/complexity.cc
deleted file mode 100644
index 6ef1766..0000000
--- a/third_party/google-benchmark/src/complexity.cc
+++ /dev/null
@@ -1,228 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#include "benchmark/benchmark.h"
-
-#include <algorithm>
-#include <cmath>
-#include "check.h"
-#include "complexity.h"
-
-namespace benchmark {
-
-// Internal function to calculate the different scalability forms
-BigOFunc* FittingCurve(BigO complexity) {
-  static const double kLog2E = 1.44269504088896340736;
-  switch (complexity) {
-    case oN:
-      return [](int64_t n) -> double { return static_cast<double>(n); };
-    case oNSquared:
-      return [](int64_t n) -> double { return std::pow(n, 2); };
-    case oNCubed:
-      return [](int64_t n) -> double { return std::pow(n, 3); };
-    case oLogN:
-      /* Note: can't use log2 because Android's GNU STL lacks it */
-      return [](int64_t n) { return kLog2E * log(static_cast<double>(n)); };
-    case oNLogN:
-      /* Note: can't use log2 because Android's GNU STL lacks it */
-      return [](int64_t n) { return kLog2E * n * log(static_cast<double>(n)); };
-    case o1:
-    default:
-      return [](int64_t) { return 1.0; };
-  }
-}
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity) {
-  switch (complexity) {
-    case oN:
-      return "N";
-    case oNSquared:
-      return "N^2";
-    case oNCubed:
-      return "N^3";
-    case oLogN:
-      return "lgN";
-    case oNLogN:
-      return "NlgN";
-    case o1:
-      return "(1)";
-    default:
-      return "f(N)";
-  }
-}
-
-// Find the coefficient for the high-order term in the running time, by
-// minimizing the sum of squares of relative error, for the fitting curve
-// given by the lambda expression.
-//   - n             : Vector containing the size of the benchmark tests.
-//   - time          : Vector containing the times for the benchmark tests.
-//   - fitting_curve : lambda expression (e.g. [](int64_t n) {return n; };).
-
-// For a deeper explanation on the algorithm logic, please refer to
-// https://en.wikipedia.org/wiki/Least_squares#Least_squares,_regression_analysis_and_statistics
-
-LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
-                       const std::vector<double>& time,
-                       BigOFunc* fitting_curve) {
-  double sigma_gn = 0.0;
-  double sigma_gn_squared = 0.0;
-  double sigma_time = 0.0;
-  double sigma_time_gn = 0.0;
-
-  // Calculate least square fitting parameter
-  for (size_t i = 0; i < n.size(); ++i) {
-    double gn_i = fitting_curve(n[i]);
-    sigma_gn += gn_i;
-    sigma_gn_squared += gn_i * gn_i;
-    sigma_time += time[i];
-    sigma_time_gn += time[i] * gn_i;
-  }
-
-  LeastSq result;
-  result.complexity = oLambda;
-
-  // Calculate complexity.
-  result.coef = sigma_time_gn / sigma_gn_squared;
-
-  // Calculate RMS
-  double rms = 0.0;
-  for (size_t i = 0; i < n.size(); ++i) {
-    double fit = result.coef * fitting_curve(n[i]);
-    rms += pow((time[i] - fit), 2);
-  }
-
-  // Normalized RMS by the mean of the observed values
-  double mean = sigma_time / n.size();
-  result.rms = sqrt(rms / n.size()) / mean;
-
-  return result;
-}
-
-// Find the coefficient for the high-order term in the running time, by
-// minimizing the sum of squares of relative error.
-//   - n          : Vector containing the size of the benchmark tests.
-//   - time       : Vector containing the times for the benchmark tests.
-//   - complexity : If different than oAuto, the fitting curve will stick to
-//                  this one. If it is oAuto, it will be calculated the best
-//                  fitting curve.
-LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
-                       const std::vector<double>& time, const BigO complexity) {
-  CHECK_EQ(n.size(), time.size());
-  CHECK_GE(n.size(), 2);  // Do not compute fitting curve is less than two
-                          // benchmark runs are given
-  CHECK_NE(complexity, oNone);
-
-  LeastSq best_fit;
-
-  if (complexity == oAuto) {
-    std::vector<BigO> fit_curves = {oLogN, oN, oNLogN, oNSquared, oNCubed};
-
-    // Take o1 as default best fitting curve
-    best_fit = MinimalLeastSq(n, time, FittingCurve(o1));
-    best_fit.complexity = o1;
-
-    // Compute all possible fitting curves and stick to the best one
-    for (const auto& fit : fit_curves) {
-      LeastSq current_fit = MinimalLeastSq(n, time, FittingCurve(fit));
-      if (current_fit.rms < best_fit.rms) {
-        best_fit = current_fit;
-        best_fit.complexity = fit;
-      }
-    }
-  } else {
-    best_fit = MinimalLeastSq(n, time, FittingCurve(complexity));
-    best_fit.complexity = complexity;
-  }
-
-  return best_fit;
-}
-
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports) {
-  typedef BenchmarkReporter::Run Run;
-  std::vector<Run> results;
-
-  if (reports.size() < 2) return results;
-
-  // Accumulators.
-  std::vector<int64_t> n;
-  std::vector<double> real_time;
-  std::vector<double> cpu_time;
-
-  // Populate the accumulators.
-  for (const Run& run : reports) {
-    CHECK_GT(run.complexity_n, 0) << "Did you forget to call SetComplexityN?";
-    n.push_back(run.complexity_n);
-    real_time.push_back(run.real_accumulated_time / run.iterations);
-    cpu_time.push_back(run.cpu_accumulated_time / run.iterations);
-  }
-
-  LeastSq result_cpu;
-  LeastSq result_real;
-
-  if (reports[0].complexity == oLambda) {
-    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity_lambda);
-    result_real = MinimalLeastSq(n, real_time, reports[0].complexity_lambda);
-  } else {
-    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity);
-    result_real = MinimalLeastSq(n, real_time, result_cpu.complexity);
-  }
-
-  std::string run_name = reports[0].benchmark_name().substr(
-      0, reports[0].benchmark_name().find('/'));
-
-  // Get the data from the accumulator to BenchmarkReporter::Run's.
-  Run big_o;
-  big_o.run_name = run_name;
-  big_o.run_type = BenchmarkReporter::Run::RT_Aggregate;
-  big_o.aggregate_name = "BigO";
-  big_o.iterations = 0;
-  big_o.real_accumulated_time = result_real.coef;
-  big_o.cpu_accumulated_time = result_cpu.coef;
-  big_o.report_big_o = true;
-  big_o.complexity = result_cpu.complexity;
-
-  // All the time results are reported after being multiplied by the
-  // time unit multiplier. But since RMS is a relative quantity it
-  // should not be multiplied at all. So, here, we _divide_ it by the
-  // multiplier so that when it is multiplied later the result is the
-  // correct one.
-  double multiplier = GetTimeUnitMultiplier(reports[0].time_unit);
-
-  // Only add label to mean/stddev if it is same for all runs
-  Run rms;
-  rms.run_name = run_name;
-  big_o.report_label = reports[0].report_label;
-  rms.run_type = BenchmarkReporter::Run::RT_Aggregate;
-  rms.aggregate_name = "RMS";
-  rms.report_label = big_o.report_label;
-  rms.iterations = 0;
-  rms.real_accumulated_time = result_real.rms / multiplier;
-  rms.cpu_accumulated_time = result_cpu.rms / multiplier;
-  rms.report_rms = true;
-  rms.complexity = result_cpu.complexity;
-  // don't forget to keep the time unit, or we won't be able to
-  // recover the correct value.
-  rms.time_unit = reports[0].time_unit;
-
-  results.push_back(big_o);
-  results.push_back(rms);
-  return results;
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/complexity.h b/third_party/google-benchmark/src/complexity.h
deleted file mode 100644
index df29b48..0000000
--- a/third_party/google-benchmark/src/complexity.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#ifndef COMPLEXITY_H_
-#define COMPLEXITY_H_
-
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the bigO and RMS information for the specified
-// list of reports. If 'reports.size() < 2' an empty vector is returned.
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-// This data structure will contain the result returned by MinimalLeastSq
-//   - coef        : Estimated coeficient for the high-order term as
-//                   interpolated from data.
-//   - rms         : Normalized Root Mean Squared Error.
-//   - complexity  : Scalability form (e.g. oN, oNLogN). In case a scalability
-//                   form has been provided to MinimalLeastSq this will return
-//                   the same value. In case BigO::oAuto has been selected, this
-//                   parameter will return the best fitting curve detected.
-
-struct LeastSq {
-  LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
-
-  double coef;
-  double rms;
-  BigO complexity;
-};
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity);
-
-}  // end namespace benchmark
-
-#endif  // COMPLEXITY_H_
diff --git a/third_party/google-benchmark/src/console_reporter.cc b/third_party/google-benchmark/src/console_reporter.cc
deleted file mode 100644
index cc8ae27..0000000
--- a/third_party/google-benchmark/src/console_reporter.cc
+++ /dev/null
@@ -1,179 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-#include "counter.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <cstdio>
-#include <iostream>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "internal_macros.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-bool ConsoleReporter::ReportContext(const Context& context) {
-  name_field_width_ = context.name_field_width;
-  printed_header_ = false;
-  prev_counters_.clear();
-
-  PrintBasicContext(&GetErrorStream(), context);
-
-#ifdef BENCHMARK_OS_WINDOWS
-  if ((output_options_ & OO_Color) && &std::cout != &GetOutputStream()) {
-    GetErrorStream()
-        << "Color printing is only supported for stdout on windows."
-           " Disabling color printing\n";
-    output_options_ = static_cast< OutputOptions >(output_options_ & ~OO_Color);
-  }
-#endif
-
-  return true;
-}
-
-void ConsoleReporter::PrintHeader(const Run& run) {
-  std::string str = FormatString("%-*s %13s %15s %12s", static_cast<int>(name_field_width_),
-                                 "Benchmark", "Time", "CPU", "Iterations");
-  if(!run.counters.empty()) {
-    if(output_options_ & OO_Tabular) {
-      for(auto const& c : run.counters) {
-        str += FormatString(" %10s", c.first.c_str());
-      }
-    } else {
-      str += " UserCounters...";
-    }
-  }
-  std::string line = std::string(str.length(), '-');
-  GetOutputStream() << line << "\n" << str << "\n" << line << "\n";
-}
-
-void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
-  for (const auto& run : reports) {
-    // print the header:
-    // --- if none was printed yet
-    bool print_header = !printed_header_;
-    // --- or if the format is tabular and this run
-    //     has different fields from the prev header
-    print_header |= (output_options_ & OO_Tabular) &&
-                    (!internal::SameNames(run.counters, prev_counters_));
-    if (print_header) {
-      printed_header_ = true;
-      prev_counters_ = run.counters;
-      PrintHeader(run);
-    }
-    // As an alternative to printing the headers like this, we could sort
-    // the benchmarks by header and then print. But this would require
-    // waiting for the full results before printing, or printing twice.
-    PrintRunData(run);
-  }
-}
-
-static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
-                             ...) {
-  va_list args;
-  va_start(args, fmt);
-  out << FormatString(fmt, args);
-  va_end(args);
-}
-
-
-static std::string FormatTime(double time) {
-  // Align decimal places...
-  if (time < 1.0) {
-    return FormatString("%10.3f", time);
-  }
-  if (time < 10.0) {
-    return FormatString("%10.2f", time);
-  }
-  if (time < 100.0) {
-    return FormatString("%10.1f", time);
-  }
-  return FormatString("%10.0f", time);
-}
-
-void ConsoleReporter::PrintRunData(const Run& result) {
-  typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
-  auto& Out = GetOutputStream();
-  PrinterFn* printer = (output_options_ & OO_Color) ?
-                         (PrinterFn*)ColorPrintf : IgnoreColorPrint;
-  auto name_color =
-      (result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
-  printer(Out, name_color, "%-*s ", name_field_width_,
-          result.benchmark_name().c_str());
-
-  if (result.error_occurred) {
-    printer(Out, COLOR_RED, "ERROR OCCURRED: \'%s\'",
-            result.error_message.c_str());
-    printer(Out, COLOR_DEFAULT, "\n");
-    return;
-  }
-
-  const double real_time = result.GetAdjustedRealTime();
-  const double cpu_time = result.GetAdjustedCPUTime();
-  const std::string real_time_str = FormatTime(real_time);
-  const std::string cpu_time_str = FormatTime(cpu_time);
-
-
-  if (result.report_big_o) {
-    std::string big_o = GetBigOString(result.complexity);
-    printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ", real_time, big_o.c_str(),
-            cpu_time, big_o.c_str());
-  } else if (result.report_rms) {
-    printer(Out, COLOR_YELLOW, "%10.0f %-4s %10.0f %-4s ", real_time * 100, "%",
-            cpu_time * 100, "%");
-  } else {
-    const char* timeLabel = GetTimeUnitString(result.time_unit);
-    printer(Out, COLOR_YELLOW, "%s %-4s %s %-4s ", real_time_str.c_str(), timeLabel,
-            cpu_time_str.c_str(), timeLabel);
-  }
-
-  if (!result.report_big_o && !result.report_rms) {
-    printer(Out, COLOR_CYAN, "%10lld", result.iterations);
-  }
-
-  for (auto& c : result.counters) {
-    const std::size_t cNameLen = std::max(std::string::size_type(10),
-                                          c.first.length());
-    auto const& s = HumanReadableNumber(c.second.value, c.second.oneK);
-    if (output_options_ & OO_Tabular) {
-      if (c.second.flags & Counter::kIsRate) {
-        printer(Out, COLOR_DEFAULT, " %*s/s", cNameLen - 2, s.c_str());
-      } else {
-        printer(Out, COLOR_DEFAULT, " %*s", cNameLen, s.c_str());
-      }
-    } else {
-      const char* unit = (c.second.flags & Counter::kIsRate) ? "/s" : "";
-      printer(Out, COLOR_DEFAULT, " %s=%s%s", c.first.c_str(), s.c_str(),
-              unit);
-    }
-  }
-
-  if (!result.report_label.empty()) {
-    printer(Out, COLOR_DEFAULT, " %s", result.report_label.c_str());
-  }
-
-  printer(Out, COLOR_DEFAULT, "\n");
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/counter.cc b/third_party/google-benchmark/src/counter.cc
deleted file mode 100644
index cb604e0..0000000
--- a/third_party/google-benchmark/src/counter.cc
+++ /dev/null
@@ -1,75 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "counter.h"
-
-namespace benchmark {
-namespace internal {
-
-double Finish(Counter const& c, int64_t iterations, double cpu_time,
-              double num_threads) {
-  double v = c.value;
-  if (c.flags & Counter::kIsRate) {
-    v /= cpu_time;
-  }
-  if (c.flags & Counter::kAvgThreads) {
-    v /= num_threads;
-  }
-  if (c.flags & Counter::kIsIterationInvariant) {
-    v *= iterations;
-  }
-  if (c.flags & Counter::kAvgIterations) {
-    v /= iterations;
-  }
-  return v;
-}
-
-void Finish(UserCounters* l, int64_t iterations, double cpu_time, double num_threads) {
-  for (auto& c : *l) {
-    c.second.value = Finish(c.second, iterations, cpu_time, num_threads);
-  }
-}
-
-void Increment(UserCounters* l, UserCounters const& r) {
-  // add counters present in both or just in *l
-  for (auto& c : *l) {
-    auto it = r.find(c.first);
-    if (it != r.end()) {
-      c.second.value = c.second + it->second;
-    }
-  }
-  // add counters present in r, but not in *l
-  for (auto const& tc : r) {
-    auto it = l->find(tc.first);
-    if (it == l->end()) {
-      (*l)[tc.first] = tc.second;
-    }
-  }
-}
-
-bool SameNames(UserCounters const& l, UserCounters const& r) {
-  if (&l == &r) return true;
-  if (l.size() != r.size()) {
-    return false;
-  }
-  for (auto const& c : l) {
-    if (r.find(c.first) == r.end()) {
-      return false;
-    }
-  }
-  return true;
-}
-
-}  // end namespace internal
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/counter.h b/third_party/google-benchmark/src/counter.h
deleted file mode 100644
index d884e50..0000000
--- a/third_party/google-benchmark/src/counter.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// these counter-related functions are hidden to reduce API surface.
-namespace internal {
-void Finish(UserCounters* l, int64_t iterations, double time, double num_threads);
-void Increment(UserCounters* l, UserCounters const& r);
-bool SameNames(UserCounters const& l, UserCounters const& r);
-}  // end namespace internal
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/csv_reporter.cc b/third_party/google-benchmark/src/csv_reporter.cc
deleted file mode 100644
index d2f1d27..0000000
--- a/third_party/google-benchmark/src/csv_reporter.cc
+++ /dev/null
@@ -1,153 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <iostream>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "check.h"
-#include "string_util.h"
-#include "timers.h"
-
-// File format reference: http://edoceo.com/utilitas/csv-file-format.
-
-namespace benchmark {
-
-namespace {
-std::vector<std::string> elements = {
-    "name",           "iterations",       "real_time",        "cpu_time",
-    "time_unit",      "bytes_per_second", "items_per_second", "label",
-    "error_occurred", "error_message"};
-}  // namespace
-
-bool CSVReporter::ReportContext(const Context& context) {
-  PrintBasicContext(&GetErrorStream(), context);
-  return true;
-}
-
-void CSVReporter::ReportRuns(const std::vector<Run>& reports) {
-  std::ostream& Out = GetOutputStream();
-
-  if (!printed_header_) {
-    // save the names of all the user counters
-    for (const auto& run : reports) {
-      for (const auto& cnt : run.counters) {
-        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
-          continue;
-        user_counter_names_.insert(cnt.first);
-      }
-    }
-
-    // print the header
-    for (auto B = elements.begin(); B != elements.end();) {
-      Out << *B++;
-      if (B != elements.end()) Out << ",";
-    }
-    for (auto B = user_counter_names_.begin();
-         B != user_counter_names_.end();) {
-      Out << ",\"" << *B++ << "\"";
-    }
-    Out << "\n";
-
-    printed_header_ = true;
-  } else {
-    // check that all the current counters are saved in the name set
-    for (const auto& run : reports) {
-      for (const auto& cnt : run.counters) {
-        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
-          continue;
-        CHECK(user_counter_names_.find(cnt.first) != user_counter_names_.end())
-            << "All counters must be present in each run. "
-            << "Counter named \"" << cnt.first
-            << "\" was not in a run after being added to the header";
-      }
-    }
-  }
-
-  // print results for each run
-  for (const auto& run : reports) {
-    PrintRunData(run);
-  }
-}
-
-void CSVReporter::PrintRunData(const Run& run) {
-  std::ostream& Out = GetOutputStream();
-
-  // Field with embedded double-quote characters must be doubled and the field
-  // delimited with double-quotes.
-  std::string name = run.benchmark_name();
-  ReplaceAll(&name, "\"", "\"\"");
-  Out << '"' << name << "\",";
-  if (run.error_occurred) {
-    Out << std::string(elements.size() - 3, ',');
-    Out << "true,";
-    std::string msg = run.error_message;
-    ReplaceAll(&msg, "\"", "\"\"");
-    Out << '"' << msg << "\"\n";
-    return;
-  }
-
-  // Do not print iteration on bigO and RMS report
-  if (!run.report_big_o && !run.report_rms) {
-    Out << run.iterations;
-  }
-  Out << ",";
-
-  Out << run.GetAdjustedRealTime() << ",";
-  Out << run.GetAdjustedCPUTime() << ",";
-
-  // Do not print timeLabel on bigO and RMS report
-  if (run.report_big_o) {
-    Out << GetBigOString(run.complexity);
-  } else if (!run.report_rms) {
-    Out << GetTimeUnitString(run.time_unit);
-  }
-  Out << ",";
-
-  if (run.counters.find("bytes_per_second") != run.counters.end()) {
-    Out << run.counters.at("bytes_per_second");
-  }
-  Out << ",";
-  if (run.counters.find("items_per_second") != run.counters.end()) {
-    Out << run.counters.at("items_per_second");
-  }
-  Out << ",";
-  if (!run.report_label.empty()) {
-    // Field with embedded double-quote characters must be doubled and the field
-    // delimited with double-quotes.
-    std::string label = run.report_label;
-    ReplaceAll(&label, "\"", "\"\"");
-    Out << "\"" << label << "\"";
-  }
-  Out << ",,";  // for error_occurred and error_message
-
-  // Print user counters
-  for (const auto& ucn : user_counter_names_) {
-    auto it = run.counters.find(ucn);
-    if (it == run.counters.end()) {
-      Out << ",";
-    } else {
-      Out << "," << it->second;
-    }
-  }
-  Out << '\n';
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/cycleclock.h b/third_party/google-benchmark/src/cycleclock.h
deleted file mode 100644
index f5e37b0..0000000
--- a/third_party/google-benchmark/src/cycleclock.h
+++ /dev/null
@@ -1,177 +0,0 @@
-// ----------------------------------------------------------------------
-// CycleClock
-//    A CycleClock tells you the current time in Cycles.  The "time"
-//    is actually time since power-on.  This is like time() but doesn't
-//    involve a system call and is much more precise.
-//
-// NOTE: Not all cpu/platform/kernel combinations guarantee that this
-// clock increments at a constant rate or is synchronized across all logical
-// cpus in a system.
-//
-// If you need the above guarantees, please consider using a different
-// API. There are efforts to provide an interface which provides a millisecond
-// granularity and implemented as a memory read. A memory read is generally
-// cheaper than the CycleClock for many architectures.
-//
-// Also, in some out of order CPU implementations, the CycleClock is not
-// serializing. So if you're trying to count at cycles granularity, your
-// data might be inaccurate due to out of order instruction execution.
-// ----------------------------------------------------------------------
-
-#ifndef BENCHMARK_CYCLECLOCK_H_
-#define BENCHMARK_CYCLECLOCK_H_
-
-#include <cstdint>
-
-#include "benchmark/benchmark.h"
-#include "internal_macros.h"
-
-#if defined(BENCHMARK_OS_MACOSX)
-#include <mach/mach_time.h>
-#endif
-// For MSVC, we want to use '_asm rdtsc' when possible (since it works
-// with even ancient MSVC compilers), and when not possible the
-// __rdtsc intrinsic, declared in <intrin.h>.  Unfortunately, in some
-// environments, <windows.h> and <intrin.h> have conflicting
-// declarations of some other intrinsics, breaking compilation.
-// Therefore, we simply declare __rdtsc ourselves. See also
-// http://connect.microsoft.com/VisualStudio/feedback/details/262047
-#if defined(COMPILER_MSVC) && !defined(_M_IX86)
-extern "C" uint64_t __rdtsc();
-#pragma intrinsic(__rdtsc)
-#endif
-
-#if !defined(BENCHMARK_OS_WINDOWS) || defined(BENCHMARK_OS_MINGW)
-#include <sys/time.h>
-#include <time.h>
-#endif
-
-#ifdef BENCHMARK_OS_EMSCRIPTEN
-#include <emscripten.h>
-#endif
-
-namespace benchmark {
-// NOTE: only i386 and x86_64 have been well tested.
-// PPC, sparc, alpha, and ia64 are based on
-//    http://peter.kuscsik.com/wordpress/?p=14
-// with modifications by m3b.  See also
-//    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
-namespace cycleclock {
-// This should return the number of cycles since power-on.  Thread-safe.
-inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
-#if defined(BENCHMARK_OS_MACOSX)
-  // this goes at the top because we need ALL Macs, regardless of
-  // architecture, to return the number of "mach time units" that
-  // have passed since startup.  See sysinfo.cc where
-  // InitializeSystemInfo() sets the supposed cpu clock frequency of
-  // macs to the number of mach time units per second, not actual
-  // CPU clock frequency (which can change in the face of CPU
-  // frequency scaling).  Also note that when the Mac sleeps, this
-  // counter pauses; it does not continue counting, nor does it
-  // reset to zero.
-  return mach_absolute_time();
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // this goes above x86-specific code because old versions of Emscripten
-  // define __x86_64__, although they have nothing to do with it.
-  return static_cast<int64_t>(emscripten_get_now() * 1e+6);
-#elif defined(__i386__)
-  int64_t ret;
-  __asm__ volatile("rdtsc" : "=A"(ret));
-  return ret;
-#elif defined(__x86_64__) || defined(__amd64__)
-  uint64_t low, high;
-  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
-  return (high << 32) | low;
-#elif defined(__powerpc__) || defined(__ppc__)
-  // This returns a time-base, which is not always precisely a cycle-count.
-  int64_t tbl, tbu0, tbu1;
-  asm("mftbu %0" : "=r"(tbu0));
-  asm("mftb  %0" : "=r"(tbl));
-  asm("mftbu %0" : "=r"(tbu1));
-  tbl &= -static_cast<int64_t>(tbu0 == tbu1);
-  // high 32 bits in tbu1; low 32 bits in tbl  (tbu0 is garbage)
-  return (tbu1 << 32) | tbl;
-#elif defined(__sparc__)
-  int64_t tick;
-  asm(".byte 0x83, 0x41, 0x00, 0x00");
-  asm("mov   %%g1, %0" : "=r"(tick));
-  return tick;
-#elif defined(__ia64__)
-  int64_t itc;
-  asm("mov %0 = ar.itc" : "=r"(itc));
-  return itc;
-#elif defined(COMPILER_MSVC) && defined(_M_IX86)
-  // Older MSVC compilers (like 7.x) don't seem to support the
-  // __rdtsc intrinsic properly, so I prefer to use _asm instead
-  // when I know it will work.  Otherwise, I'll use __rdtsc and hope
-  // the code is being compiled with a non-ancient compiler.
-  _asm rdtsc
-#elif defined(COMPILER_MSVC)
-  return __rdtsc();
-#elif defined(BENCHMARK_OS_NACL)
-  // Native Client validator on x86/x86-64 allows RDTSC instructions,
-  // and this case is handled above. Native Client validator on ARM
-  // rejects MRC instructions (used in the ARM-specific sequence below),
-  // so we handle it here. Portable Native Client compiles to
-  // architecture-agnostic bytecode, which doesn't provide any
-  // cycle counter access mnemonics.
-
-  // Native Client does not provide any API to access cycle counter.
-  // Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
-  // because is provides nanosecond resolution (which is noticable at
-  // least for PNaCl modules running on x86 Mac & Linux).
-  // Initialize to always return 0 if clock_gettime fails.
-  struct timespec ts = {0, 0};
-  clock_gettime(CLOCK_MONOTONIC, &ts);
-  return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
-#elif defined(__aarch64__)
-  // System timer of ARMv8 runs at a different frequency than the CPU's.
-  // The frequency is fixed, typically in the range 1-50MHz.  It can be
-  // read at CNTFRQ special register.  We assume the OS has set up
-  // the virtual timer properly.
-  int64_t virtual_timer_value;
-  asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
-  return virtual_timer_value;
-#elif defined(__ARM_ARCH)
-  // V6 is the earliest arch that has a standard cyclecount
-  // Native Client validator doesn't allow MRC instructions.
-#if (__ARM_ARCH >= 6)
-  uint32_t pmccntr;
-  uint32_t pmuseren;
-  uint32_t pmcntenset;
-  // Read the user mode perf monitor counter access permissions.
-  asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
-  if (pmuseren & 1) {  // Allows reading perfmon counters for user mode code.
-    asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
-    if (pmcntenset & 0x80000000ul) {  // Is it counting?
-      asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
-      // The counter is set up to count every 64th cycle
-      return static_cast<int64_t>(pmccntr) * 64;  // Should optimize to << 6
-    }
-  }
-#endif
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__mips__)
-  // mips apparently only allows rdtsc for superusers, so we fall
-  // back to gettimeofday.  It's possible clock_gettime would be better.
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__s390__)  // Covers both s390 and s390x.
-  // Return the CPU clock.
-  uint64_t tsc;
-  asm("stck %0" : "=Q"(tsc) : : "cc");
-  return tsc;
-#else
-// The soft failover to a generic implementation is automatic only for ARM.
-// For other platforms the developer is expected to make an attempt to create
-// a fast implementation and use generic version if nothing better is available.
-#error You need to define CycleTimer for your OS and CPU
-#endif
-}
-}  // end namespace cycleclock
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_CYCLECLOCK_H_
diff --git a/third_party/google-benchmark/src/internal_macros.h b/third_party/google-benchmark/src/internal_macros.h
deleted file mode 100644
index 5dbf4fd..0000000
--- a/third_party/google-benchmark/src/internal_macros.h
+++ /dev/null
@@ -1,92 +0,0 @@
-#ifndef BENCHMARK_INTERNAL_MACROS_H_
-#define BENCHMARK_INTERNAL_MACROS_H_
-
-#include "benchmark/benchmark.h"
-
-/* Needed to detect STL */
-#include <cstdlib>
-
-// clang-format off
-
-#ifndef __has_feature
-#define __has_feature(x) 0
-#endif
-
-#if defined(__clang__)
-  #if !defined(COMPILER_CLANG)
-    #define COMPILER_CLANG
-  #endif
-#elif defined(_MSC_VER)
-  #if !defined(COMPILER_MSVC)
-    #define COMPILER_MSVC
-  #endif
-#elif defined(__GNUC__)
-  #if !defined(COMPILER_GCC)
-    #define COMPILER_GCC
-  #endif
-#endif
-
-#if __has_feature(cxx_attributes)
-  #define BENCHMARK_NORETURN [[noreturn]]
-#elif defined(__GNUC__)
-  #define BENCHMARK_NORETURN __attribute__((noreturn))
-#elif defined(COMPILER_MSVC)
-  #define BENCHMARK_NORETURN __declspec(noreturn)
-#else
-  #define BENCHMARK_NORETURN
-#endif
-
-#if defined(__CYGWIN__)
-  #define BENCHMARK_OS_CYGWIN 1
-#elif defined(_WIN32)
-  #define BENCHMARK_OS_WINDOWS 1
-  #if defined(__MINGW32__)
-    #define BENCHMARK_OS_MINGW 1
-  #endif
-#elif defined(__APPLE__)
-  #define BENCHMARK_OS_APPLE 1
-  #include "TargetConditionals.h"
-  #if defined(TARGET_OS_MAC)
-    #define BENCHMARK_OS_MACOSX 1
-    #if defined(TARGET_OS_IPHONE)
-      #define BENCHMARK_OS_IOS 1
-    #endif
-  #endif
-#elif defined(__FreeBSD__)
-  #define BENCHMARK_OS_FREEBSD 1
-#elif defined(__NetBSD__)
-  #define BENCHMARK_OS_NETBSD 1
-#elif defined(__OpenBSD__)
-  #define BENCHMARK_OS_OPENBSD 1
-#elif defined(__linux__)
-  #define BENCHMARK_OS_LINUX 1
-#elif defined(__native_client__)
-  #define BENCHMARK_OS_NACL 1
-#elif defined(__EMSCRIPTEN__)
-  #define BENCHMARK_OS_EMSCRIPTEN 1
-#elif defined(__rtems__)
-  #define BENCHMARK_OS_RTEMS 1
-#elif defined(__Fuchsia__)
-#define BENCHMARK_OS_FUCHSIA 1
-#elif defined (__SVR4) && defined (__sun)
-#define BENCHMARK_OS_SOLARIS 1
-#endif
-
-#if defined(__ANDROID__) && defined(__GLIBCXX__)
-#define BENCHMARK_STL_ANDROID_GNUSTL 1
-#endif
-
-#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
-     && !defined(__EXCEPTIONS)
-  #define BENCHMARK_HAS_NO_EXCEPTIONS
-#endif
-
-#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
-  #define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
-#else
-  #define BENCHMARK_MAYBE_UNUSED
-#endif
-
-// clang-format on
-
-#endif  // BENCHMARK_INTERNAL_MACROS_H_
diff --git a/third_party/google-benchmark/src/json_reporter.cc b/third_party/google-benchmark/src/json_reporter.cc
deleted file mode 100644
index 7d01e8e..0000000
--- a/third_party/google-benchmark/src/json_reporter.cc
+++ /dev/null
@@ -1,220 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <iomanip>  // for setprecision
-#include <iostream>
-#include <limits>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-namespace {
-
-std::string FormatKV(std::string const& key, std::string const& value) {
-  return StrFormat("\"%s\": \"%s\"", key.c_str(), value.c_str());
-}
-
-std::string FormatKV(std::string const& key, const char* value) {
-  return StrFormat("\"%s\": \"%s\"", key.c_str(), value);
-}
-
-std::string FormatKV(std::string const& key, bool value) {
-  return StrFormat("\"%s\": %s", key.c_str(), value ? "true" : "false");
-}
-
-std::string FormatKV(std::string const& key, int64_t value) {
-  std::stringstream ss;
-  ss << '"' << key << "\": " << value;
-  return ss.str();
-}
-
-std::string FormatKV(std::string const& key, double value) {
-  std::stringstream ss;
-  ss << '"' << key << "\": ";
-
-  const auto max_digits10 = std::numeric_limits<decltype(value)>::max_digits10;
-  const auto max_fractional_digits10 = max_digits10 - 1;
-
-  ss << std::scientific << std::setprecision(max_fractional_digits10) << value;
-  return ss.str();
-}
-
-int64_t RoundDouble(double v) { return static_cast<int64_t>(v + 0.5); }
-
-}  // end namespace
-
-bool JSONReporter::ReportContext(const Context& context) {
-  std::ostream& out = GetOutputStream();
-
-  out << "{\n";
-  std::string inner_indent(2, ' ');
-
-  // Open context block and print context information.
-  out << inner_indent << "\"context\": {\n";
-  std::string indent(4, ' ');
-
-  std::string walltime_value = LocalDateTimeString();
-  out << indent << FormatKV("date", walltime_value) << ",\n";
-
-  out << indent << FormatKV("host_name", context.sys_info.name) << ",\n";
-
-  if (Context::executable_name) {
-    // windows uses backslash for its path separator,
-    // which must be escaped in JSON otherwise it blows up conforming JSON
-    // decoders
-    std::string executable_name = Context::executable_name;
-    ReplaceAll(&executable_name, "\\", "\\\\");
-    out << indent << FormatKV("executable", executable_name) << ",\n";
-  }
-
-  CPUInfo const& info = context.cpu_info;
-  out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
-      << ",\n";
-  out << indent
-      << FormatKV("mhz_per_cpu",
-                  RoundDouble(info.cycles_per_second / 1000000.0))
-      << ",\n";
-  out << indent << FormatKV("cpu_scaling_enabled", info.scaling_enabled)
-      << ",\n";
-
-  out << indent << "\"caches\": [\n";
-  indent = std::string(6, ' ');
-  std::string cache_indent(8, ' ');
-  for (size_t i = 0; i < info.caches.size(); ++i) {
-    auto& CI = info.caches[i];
-    out << indent << "{\n";
-    out << cache_indent << FormatKV("type", CI.type) << ",\n";
-    out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
-        << ",\n";
-    out << cache_indent
-        << FormatKV("size", static_cast<int64_t>(CI.size) * 1000u) << ",\n";
-    out << cache_indent
-        << FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
-        << "\n";
-    out << indent << "}";
-    if (i != info.caches.size() - 1) out << ",";
-    out << "\n";
-  }
-  indent = std::string(4, ' ');
-  out << indent << "],\n";
-  out << indent << "\"load_avg\": [";
-  for (auto it = info.load_avg.begin(); it != info.load_avg.end();) {
-    out << *it++;
-    if (it != info.load_avg.end()) out << ",";
-  }
-  out << "],\n";
-
-#if defined(NDEBUG)
-  const char build_type[] = "release";
-#else
-  const char build_type[] = "debug";
-#endif
-  out << indent << FormatKV("library_build_type", build_type) << "\n";
-  // Close context block and open the list of benchmarks.
-  out << inner_indent << "},\n";
-  out << inner_indent << "\"benchmarks\": [\n";
-  return true;
-}
-
-void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
-  if (reports.empty()) {
-    return;
-  }
-  std::string indent(4, ' ');
-  std::ostream& out = GetOutputStream();
-  if (!first_report_) {
-    out << ",\n";
-  }
-  first_report_ = false;
-
-  for (auto it = reports.begin(); it != reports.end(); ++it) {
-    out << indent << "{\n";
-    PrintRunData(*it);
-    out << indent << '}';
-    auto it_cp = it;
-    if (++it_cp != reports.end()) {
-      out << ",\n";
-    }
-  }
-}
-
-void JSONReporter::Finalize() {
-  // Close the list of benchmarks and the top level object.
-  GetOutputStream() << "\n  ]\n}\n";
-}
-
-void JSONReporter::PrintRunData(Run const& run) {
-  std::string indent(6, ' ');
-  std::ostream& out = GetOutputStream();
-  out << indent << FormatKV("name", run.benchmark_name()) << ",\n";
-  out << indent << FormatKV("run_name", run.run_name) << ",\n";
-  out << indent << FormatKV("run_type", [&run]() -> const char* {
-    switch (run.run_type) {
-      case BenchmarkReporter::Run::RT_Iteration:
-        return "iteration";
-      case BenchmarkReporter::Run::RT_Aggregate:
-        return "aggregate";
-    }
-    BENCHMARK_UNREACHABLE();
-  }()) << ",\n";
-  if (run.run_type == BenchmarkReporter::Run::RT_Aggregate) {
-    out << indent << FormatKV("aggregate_name", run.aggregate_name) << ",\n";
-  }
-  if (run.error_occurred) {
-    out << indent << FormatKV("error_occurred", run.error_occurred) << ",\n";
-    out << indent << FormatKV("error_message", run.error_message) << ",\n";
-  }
-  if (!run.report_big_o && !run.report_rms) {
-    out << indent << FormatKV("iterations", run.iterations) << ",\n";
-    out << indent << FormatKV("real_time", run.GetAdjustedRealTime()) << ",\n";
-    out << indent << FormatKV("cpu_time", run.GetAdjustedCPUTime());
-    out << ",\n"
-        << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
-  } else if (run.report_big_o) {
-    out << indent << FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
-        << ",\n";
-    out << indent << FormatKV("real_coefficient", run.GetAdjustedRealTime())
-        << ",\n";
-    out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
-    out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
-  } else if (run.report_rms) {
-    out << indent << FormatKV("rms", run.GetAdjustedCPUTime());
-  }
-
-  for (auto& c : run.counters) {
-    out << ",\n" << indent << FormatKV(c.first, c.second);
-  }
-
-  if (run.has_memory_result) {
-    out << ",\n" << indent << FormatKV("allocs_per_iter", run.allocs_per_iter);
-    out << ",\n" << indent << FormatKV("max_bytes_used", run.max_bytes_used);
-  }
-
-  if (!run.report_label.empty()) {
-    out << ",\n" << indent << FormatKV("label", run.report_label);
-  }
-  out << '\n';
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/log.h b/third_party/google-benchmark/src/log.h
deleted file mode 100644
index 47d0c35..0000000
--- a/third_party/google-benchmark/src/log.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#ifndef BENCHMARK_LOG_H_
-#define BENCHMARK_LOG_H_
-
-#include <iostream>
-#include <ostream>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-namespace internal {
-
-typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
-
-class LogType {
-  friend LogType& GetNullLogInstance();
-  friend LogType& GetErrorLogInstance();
-
-  // FIXME: Add locking to output.
-  template <class Tp>
-  friend LogType& operator<<(LogType&, Tp const&);
-  friend LogType& operator<<(LogType&, EndLType*);
-
- private:
-  LogType(std::ostream* out) : out_(out) {}
-  std::ostream* out_;
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(LogType);
-};
-
-template <class Tp>
-LogType& operator<<(LogType& log, Tp const& value) {
-  if (log.out_) {
-    *log.out_ << value;
-  }
-  return log;
-}
-
-inline LogType& operator<<(LogType& log, EndLType* m) {
-  if (log.out_) {
-    *log.out_ << m;
-  }
-  return log;
-}
-
-inline int& LogLevel() {
-  static int log_level = 0;
-  return log_level;
-}
-
-inline LogType& GetNullLogInstance() {
-  static LogType log(nullptr);
-  return log;
-}
-
-inline LogType& GetErrorLogInstance() {
-  static LogType log(&std::clog);
-  return log;
-}
-
-inline LogType& GetLogInstanceForLevel(int level) {
-  if (level <= LogLevel()) {
-    return GetErrorLogInstance();
-  }
-  return GetNullLogInstance();
-}
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-// clang-format off
-#define VLOG(x)                                                               \
-  (::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
-                                                                         " ")
-// clang-format on
-#endif
diff --git a/third_party/google-benchmark/src/mutex.h b/third_party/google-benchmark/src/mutex.h
deleted file mode 100644
index 5f461d0..0000000
--- a/third_party/google-benchmark/src/mutex.h
+++ /dev/null
@@ -1,155 +0,0 @@
-#ifndef BENCHMARK_MUTEX_H_
-#define BENCHMARK_MUTEX_H_
-
-#include <condition_variable>
-#include <mutex>
-
-#include "check.h"
-
-// Enable thread safety attributes only with clang.
-// The attributes can be safely erased when compiling with other compilers.
-#if defined(HAVE_THREAD_SAFETY_ATTRIBUTES)
-#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
-#else
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)  // no-op
-#endif
-
-#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(capability(x))
-
-#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
-
-#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
-
-#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
-
-#define ACQUIRED_BEFORE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
-
-#define ACQUIRED_AFTER(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
-
-#define REQUIRES(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
-
-#define REQUIRES_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
-
-#define ACQUIRE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
-
-#define ACQUIRE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
-
-#define RELEASE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
-
-#define RELEASE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
-
-#define TRY_ACQUIRE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
-
-#define TRY_ACQUIRE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
-
-#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
-
-#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(x))
-
-#define ASSERT_SHARED_CAPABILITY(x) \
-  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(x))
-
-#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
-
-#define NO_THREAD_SAFETY_ANALYSIS \
-  THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
-
-namespace benchmark {
-
-typedef std::condition_variable Condition;
-
-// NOTE: Wrappers for std::mutex and std::unique_lock are provided so that
-// we can annotate them with thread safety attributes and use the
-// -Wthread-safety warning with clang. The standard library types cannot be
-// used directly because they do not provided the required annotations.
-class CAPABILITY("mutex") Mutex {
- public:
-  Mutex() {}
-
-  void lock() ACQUIRE() { mut_.lock(); }
-  void unlock() RELEASE() { mut_.unlock(); }
-  std::mutex& native_handle() { return mut_; }
-
- private:
-  std::mutex mut_;
-};
-
-class SCOPED_CAPABILITY MutexLock {
-  typedef std::unique_lock<std::mutex> MutexLockImp;
-
- public:
-  MutexLock(Mutex& m) ACQUIRE(m) : ml_(m.native_handle()) {}
-  ~MutexLock() RELEASE() {}
-  MutexLockImp& native_handle() { return ml_; }
-
- private:
-  MutexLockImp ml_;
-};
-
-class Barrier {
- public:
-  Barrier(int num_threads) : running_threads_(num_threads) {}
-
-  // Called by each thread
-  bool wait() EXCLUDES(lock_) {
-    bool last_thread = false;
-    {
-      MutexLock ml(lock_);
-      last_thread = createBarrier(ml);
-    }
-    if (last_thread) phase_condition_.notify_all();
-    return last_thread;
-  }
-
-  void removeThread() EXCLUDES(lock_) {
-    MutexLock ml(lock_);
-    --running_threads_;
-    if (entered_ != 0) phase_condition_.notify_all();
-  }
-
- private:
-  Mutex lock_;
-  Condition phase_condition_;
-  int running_threads_;
-
-  // State for barrier management
-  int phase_number_ = 0;
-  int entered_ = 0;  // Number of threads that have entered this barrier
-
-  // Enter the barrier and wait until all other threads have also
-  // entered the barrier.  Returns iff this is the last thread to
-  // enter the barrier.
-  bool createBarrier(MutexLock& ml) REQUIRES(lock_) {
-    CHECK_LT(entered_, running_threads_);
-    entered_++;
-    if (entered_ < running_threads_) {
-      // Wait for all threads to enter
-      int phase_number_cp = phase_number_;
-      auto cb = [this, phase_number_cp]() {
-        return this->phase_number_ > phase_number_cp ||
-               entered_ == running_threads_;  // A thread has aborted in error
-      };
-      phase_condition_.wait(ml.native_handle(), cb);
-      if (phase_number_ > phase_number_cp) return false;
-      // else (running_threads_ == entered_) and we are the last thread.
-    }
-    // Last thread has reached the barrier
-    phase_number_++;
-    entered_ = 0;
-    return true;
-  }
-};
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_MUTEX_H_
diff --git a/third_party/google-benchmark/src/re.h b/third_party/google-benchmark/src/re.h
deleted file mode 100644
index fbe2503..0000000
--- a/third_party/google-benchmark/src/re.h
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_RE_H_
-#define BENCHMARK_RE_H_
-
-#include "internal_macros.h"
-
-// clang-format off
-
-#if !defined(HAVE_STD_REGEX) && \
-    !defined(HAVE_GNU_POSIX_REGEX) && \
-    !defined(HAVE_POSIX_REGEX)
-  // No explicit regex selection; detect based on builtin hints.
-  #if defined(BENCHMARK_OS_LINUX) || defined(BENCHMARK_OS_APPLE)
-    #define HAVE_POSIX_REGEX 1
-  #elif __cplusplus >= 199711L
-    #define HAVE_STD_REGEX 1
-  #endif
-#endif
-
-// Prefer C regex libraries when compiling w/o exceptions so that we can
-// correctly report errors.
-#if defined(BENCHMARK_HAS_NO_EXCEPTIONS) && \
-    defined(BENCHMARK_HAVE_STD_REGEX) && \
-    (defined(HAVE_GNU_POSIX_REGEX) || defined(HAVE_POSIX_REGEX))
-  #undef HAVE_STD_REGEX
-#endif
-
-#if defined(HAVE_STD_REGEX)
-  #include <regex>
-#elif defined(HAVE_GNU_POSIX_REGEX)
-  #include <gnuregex.h>
-#elif defined(HAVE_POSIX_REGEX)
-  #include <regex.h>
-#else
-#error No regular expression backend was found!
-#endif
-
-// clang-format on
-
-#include <string>
-
-#include "check.h"
-
-namespace benchmark {
-
-// A wrapper around the POSIX regular expression API that provides automatic
-// cleanup
-class Regex {
- public:
-  Regex() : init_(false) {}
-
-  ~Regex();
-
-  // Compile a regular expression matcher from spec.  Returns true on success.
-  //
-  // On failure (and if error is not nullptr), error is populated with a human
-  // readable error message if an error occurs.
-  bool Init(const std::string& spec, std::string* error);
-
-  // Returns whether str matches the compiled regular expression.
-  bool Match(const std::string& str);
-
- private:
-  bool init_;
-// Underlying regular expression object
-#if defined(HAVE_STD_REGEX)
-  std::regex re_;
-#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
-  regex_t re_;
-#else
-#error No regular expression backend implementation available
-#endif
-};
-
-#if defined(HAVE_STD_REGEX)
-
-inline bool Regex::Init(const std::string& spec, std::string* error) {
-#ifdef BENCHMARK_HAS_NO_EXCEPTIONS
-  ((void)error);  // suppress unused warning
-#else
-  try {
-#endif
-  re_ = std::regex(spec, std::regex_constants::extended);
-  init_ = true;
-#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
-}
-catch (const std::regex_error& e) {
-  if (error) {
-    *error = e.what();
-  }
-}
-#endif
-return init_;
-}
-
-inline Regex::~Regex() {}
-
-inline bool Regex::Match(const std::string& str) {
-  if (!init_) {
-    return false;
-  }
-  return std::regex_search(str, re_);
-}
-
-#else
-inline bool Regex::Init(const std::string& spec, std::string* error) {
-  int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    if (error) {
-      size_t needed = regerror(ec, &re_, nullptr, 0);
-      char* errbuf = new char[needed];
-      regerror(ec, &re_, errbuf, needed);
-
-      // regerror returns the number of bytes necessary to null terminate
-      // the string, so we move that when assigning to error.
-      CHECK_NE(needed, 0);
-      error->assign(errbuf, needed - 1);
-
-      delete[] errbuf;
-    }
-
-    return false;
-  }
-
-  init_ = true;
-  return true;
-}
-
-inline Regex::~Regex() {
-  if (init_) {
-    regfree(&re_);
-  }
-}
-
-inline bool Regex::Match(const std::string& str) {
-  if (!init_) {
-    return false;
-  }
-  return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
-}
-#endif
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_RE_H_
diff --git a/third_party/google-benchmark/src/reporter.cc b/third_party/google-benchmark/src/reporter.cc
deleted file mode 100644
index 59bc5f7..0000000
--- a/third_party/google-benchmark/src/reporter.cc
+++ /dev/null
@@ -1,105 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "timers.h"
-
-#include <cstdlib>
-
-#include <iostream>
-#include <tuple>
-#include <vector>
-
-#include "check.h"
-#include "string_util.h"
-
-namespace benchmark {
-
-BenchmarkReporter::BenchmarkReporter()
-    : output_stream_(&std::cout), error_stream_(&std::cerr) {}
-
-BenchmarkReporter::~BenchmarkReporter() {}
-
-void BenchmarkReporter::PrintBasicContext(std::ostream *out,
-                                          Context const &context) {
-  CHECK(out) << "cannot be null";
-  auto &Out = *out;
-
-  Out << LocalDateTimeString() << "\n";
-
-  if (context.executable_name)
-    Out << "Running " << context.executable_name << "\n";
-
-  const CPUInfo &info = context.cpu_info;
-  Out << "Run on (" << info.num_cpus << " X "
-      << (info.cycles_per_second / 1000000.0) << " MHz CPU "
-      << ((info.num_cpus > 1) ? "s" : "") << ")\n";
-  if (info.caches.size() != 0) {
-    Out << "CPU Caches:\n";
-    for (auto &CInfo : info.caches) {
-      Out << "  L" << CInfo.level << " " << CInfo.type << " "
-          << (CInfo.size / 1000) << "K";
-      if (CInfo.num_sharing != 0)
-        Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
-      Out << "\n";
-    }
-  }
-  if (!info.load_avg.empty()) {
-    Out << "Load Average: ";
-    for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
-      Out << StrFormat("%.2f", *It++);
-      if (It != info.load_avg.end()) Out << ", ";
-    }
-    Out << "\n";
-  }
-
-  if (info.scaling_enabled) {
-    Out << "***WARNING*** CPU scaling is enabled, the benchmark "
-           "real time measurements may be noisy and will incur extra "
-           "overhead.\n";
-  }
-
-#ifndef NDEBUG
-  Out << "***WARNING*** Library was built as DEBUG. Timings may be "
-         "affected.\n";
-#endif
-}
-
-// No initializer because it's already initialized to NULL.
-const char *BenchmarkReporter::Context::executable_name;
-
-BenchmarkReporter::Context::Context()
-    : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
-
-std::string BenchmarkReporter::Run::benchmark_name() const {
-  std::string name = run_name;
-  if (run_type == RT_Aggregate) {
-    name += "_" + aggregate_name;
-  }
-  return name;
-}
-
-double BenchmarkReporter::Run::GetAdjustedRealTime() const {
-  double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
-  if (iterations != 0) new_time /= static_cast<double>(iterations);
-  return new_time;
-}
-
-double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
-  double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
-  if (iterations != 0) new_time /= static_cast<double>(iterations);
-  return new_time;
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/sleep.cc b/third_party/google-benchmark/src/sleep.cc
deleted file mode 100644
index 1512ac9..0000000
--- a/third_party/google-benchmark/src/sleep.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "sleep.h"
-
-#include <cerrno>
-#include <cstdlib>
-#include <ctime>
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <windows.h>
-#endif
-
-namespace benchmark {
-#ifdef BENCHMARK_OS_WINDOWS
-// Window's Sleep takes milliseconds argument.
-void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); }
-void SleepForSeconds(double seconds) {
-  SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds));
-}
-#else   // BENCHMARK_OS_WINDOWS
-void SleepForMicroseconds(int microseconds) {
-  struct timespec sleep_time;
-  sleep_time.tv_sec = microseconds / kNumMicrosPerSecond;
-  sleep_time.tv_nsec = (microseconds % kNumMicrosPerSecond) * kNumNanosPerMicro;
-  while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR)
-    ;  // Ignore signals and wait for the full interval to elapse.
-}
-
-void SleepForMilliseconds(int milliseconds) {
-  SleepForMicroseconds(milliseconds * kNumMicrosPerMilli);
-}
-
-void SleepForSeconds(double seconds) {
-  SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond));
-}
-#endif  // BENCHMARK_OS_WINDOWS
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/sleep.h b/third_party/google-benchmark/src/sleep.h
deleted file mode 100644
index f98551a..0000000
--- a/third_party/google-benchmark/src/sleep.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef BENCHMARK_SLEEP_H_
-#define BENCHMARK_SLEEP_H_
-
-namespace benchmark {
-const int kNumMillisPerSecond = 1000;
-const int kNumMicrosPerMilli = 1000;
-const int kNumMicrosPerSecond = kNumMillisPerSecond * 1000;
-const int kNumNanosPerMicro = 1000;
-const int kNumNanosPerSecond = kNumNanosPerMicro * kNumMicrosPerSecond;
-
-void SleepForMilliseconds(int milliseconds);
-void SleepForSeconds(double seconds);
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_SLEEP_H_
diff --git a/third_party/google-benchmark/src/statistics.cc b/third_party/google-benchmark/src/statistics.cc
deleted file mode 100644
index e821aec..0000000
--- a/third_party/google-benchmark/src/statistics.cc
+++ /dev/null
@@ -1,190 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-// Copyright 2017 Roman Lebedev. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-#include <algorithm>
-#include <cmath>
-#include <numeric>
-#include <string>
-#include <vector>
-#include "check.h"
-#include "statistics.h"
-
-namespace benchmark {
-
-auto StatisticsSum = [](const std::vector<double>& v) {
-  return std::accumulate(v.begin(), v.end(), 0.0);
-};
-
-double StatisticsMean(const std::vector<double>& v) {
-  if (v.empty()) return 0.0;
-  return StatisticsSum(v) * (1.0 / v.size());
-}
-
-double StatisticsMedian(const std::vector<double>& v) {
-  if (v.size() < 3) return StatisticsMean(v);
-  std::vector<double> copy(v);
-
-  auto center = copy.begin() + v.size() / 2;
-  std::nth_element(copy.begin(), center, copy.end());
-
-  // did we have an odd number of samples?
-  // if yes, then center is the median
-  // it no, then we are looking for the average between center and the value
-  // before
-  if (v.size() % 2 == 1) return *center;
-  auto center2 = copy.begin() + v.size() / 2 - 1;
-  std::nth_element(copy.begin(), center2, copy.end());
-  return (*center + *center2) / 2.0;
-}
-
-// Return the sum of the squares of this sample set
-auto SumSquares = [](const std::vector<double>& v) {
-  return std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
-};
-
-auto Sqr = [](const double dat) { return dat * dat; };
-auto Sqrt = [](const double dat) {
-  // Avoid NaN due to imprecision in the calculations
-  if (dat < 0.0) return 0.0;
-  return std::sqrt(dat);
-};
-
-double StatisticsStdDev(const std::vector<double>& v) {
-  const auto mean = StatisticsMean(v);
-  if (v.empty()) return mean;
-
-  // Sample standard deviation is undefined for n = 1
-  if (v.size() == 1) return 0.0;
-
-  const double avg_squares = SumSquares(v) * (1.0 / v.size());
-  return Sqrt(v.size() / (v.size() - 1.0) * (avg_squares - Sqr(mean)));
-}
-
-std::vector<BenchmarkReporter::Run> ComputeStats(
-    const std::vector<BenchmarkReporter::Run>& reports) {
-  typedef BenchmarkReporter::Run Run;
-  std::vector<Run> results;
-
-  auto error_count =
-      std::count_if(reports.begin(), reports.end(),
-                    [](Run const& run) { return run.error_occurred; });
-
-  if (reports.size() - error_count < 2) {
-    // We don't report aggregated data if there was a single run.
-    return results;
-  }
-
-  // Accumulators.
-  std::vector<double> real_accumulated_time_stat;
-  std::vector<double> cpu_accumulated_time_stat;
-
-  real_accumulated_time_stat.reserve(reports.size());
-  cpu_accumulated_time_stat.reserve(reports.size());
-
-  // All repetitions should be run with the same number of iterations so we
-  // can take this information from the first benchmark.
-  int64_t const run_iterations = reports.front().iterations;
-  // create stats for user counters
-  struct CounterStat {
-    Counter c;
-    std::vector<double> s;
-  };
-  std::map<std::string, CounterStat> counter_stats;
-  for (Run const& r : reports) {
-    for (auto const& cnt : r.counters) {
-      auto it = counter_stats.find(cnt.first);
-      if (it == counter_stats.end()) {
-        counter_stats.insert({cnt.first, {cnt.second, std::vector<double>{}}});
-        it = counter_stats.find(cnt.first);
-        it->second.s.reserve(reports.size());
-      } else {
-        CHECK_EQ(counter_stats[cnt.first].c.flags, cnt.second.flags);
-      }
-    }
-  }
-
-  // Populate the accumulators.
-  for (Run const& run : reports) {
-    CHECK_EQ(reports[0].benchmark_name(), run.benchmark_name());
-    CHECK_EQ(run_iterations, run.iterations);
-    if (run.error_occurred) continue;
-    real_accumulated_time_stat.emplace_back(run.real_accumulated_time);
-    cpu_accumulated_time_stat.emplace_back(run.cpu_accumulated_time);
-    // user counters
-    for (auto const& cnt : run.counters) {
-      auto it = counter_stats.find(cnt.first);
-      CHECK_NE(it, counter_stats.end());
-      it->second.s.emplace_back(cnt.second);
-    }
-  }
-
-  // Only add label if it is same for all runs
-  std::string report_label = reports[0].report_label;
-  for (std::size_t i = 1; i < reports.size(); i++) {
-    if (reports[i].report_label != report_label) {
-      report_label = "";
-      break;
-    }
-  }
-
-  const double iteration_rescale_factor =
-      double(reports.size()) / double(run_iterations);
-
-  for (const auto& Stat : *reports[0].statistics) {
-    // Get the data from the accumulator to BenchmarkReporter::Run's.
-    Run data;
-    data.run_name = reports[0].benchmark_name();
-    data.run_type = BenchmarkReporter::Run::RT_Aggregate;
-    data.aggregate_name = Stat.name_;
-    data.report_label = report_label;
-
-    // It is incorrect to say that an aggregate is computed over
-    // run's iterations, because those iterations already got averaged.
-    // Similarly, if there are N repetitions with 1 iterations each,
-    // an aggregate will be computed over N measurements, not 1.
-    // Thus it is best to simply use the count of separate reports.
-    data.iterations = reports.size();
-
-    data.real_accumulated_time = Stat.compute_(real_accumulated_time_stat);
-    data.cpu_accumulated_time = Stat.compute_(cpu_accumulated_time_stat);
-
-    // We will divide these times by data.iterations when reporting, but the
-    // data.iterations is not nessesairly the scale of these measurements,
-    // because in each repetition, these timers are sum over all the iterations.
-    // And if we want to say that the stats are over N repetitions and not
-    // M iterations, we need to multiply these by (N/M).
-    data.real_accumulated_time *= iteration_rescale_factor;
-    data.cpu_accumulated_time *= iteration_rescale_factor;
-
-    data.time_unit = reports[0].time_unit;
-
-    // user counters
-    for (auto const& kv : counter_stats) {
-      // Do *NOT* rescale the custom counters. They are already properly scaled.
-      const auto uc_stat = Stat.compute_(kv.second.s);
-      auto c = Counter(uc_stat, counter_stats[kv.first].c.flags,
-                       counter_stats[kv.first].c.oneK);
-      data.counters[kv.first] = c;
-    }
-
-    results.push_back(data);
-  }
-
-  return results;
-}
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/statistics.h b/third_party/google-benchmark/src/statistics.h
deleted file mode 100644
index 7eccc85..0000000
--- a/third_party/google-benchmark/src/statistics.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-// Copyright 2017 Roman Lebedev. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef STATISTICS_H_
-#define STATISTICS_H_
-
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the mean, median and standard devation information
-// (and any user-specified info) for the specified list of reports. If 'reports'
-// contains less than two non-errored runs an empty vector is returned
-std::vector<BenchmarkReporter::Run> ComputeStats(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-double StatisticsMean(const std::vector<double>& v);
-double StatisticsMedian(const std::vector<double>& v);
-double StatisticsStdDev(const std::vector<double>& v);
-
-}  // end namespace benchmark
-
-#endif  // STATISTICS_H_
diff --git a/third_party/google-benchmark/src/string_util.cc b/third_party/google-benchmark/src/string_util.cc
deleted file mode 100644
index 05ac5b4..0000000
--- a/third_party/google-benchmark/src/string_util.cc
+++ /dev/null
@@ -1,261 +0,0 @@
-#include "string_util.h"
-
-#include <array>
-#include <cmath>
-#include <cstdarg>
-#include <cstdio>
-#include <memory>
-#include <sstream>
-
-#include "arraysize.h"
-
-namespace benchmark {
-namespace {
-
-// kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta.
-const char kBigSIUnits[] = "kMGTPEZY";
-// Kibi, Mebi, Gibi, Tebi, Pebi, Exbi, Zebi, Yobi.
-const char kBigIECUnits[] = "KMGTPEZY";
-// milli, micro, nano, pico, femto, atto, zepto, yocto.
-const char kSmallSIUnits[] = "munpfazy";
-
-// We require that all three arrays have the same size.
-static_assert(arraysize(kBigSIUnits) == arraysize(kBigIECUnits),
-              "SI and IEC unit arrays must be the same size");
-static_assert(arraysize(kSmallSIUnits) == arraysize(kBigSIUnits),
-              "Small SI and Big SI unit arrays must be the same size");
-
-static const int64_t kUnitsSize = arraysize(kBigSIUnits);
-
-void ToExponentAndMantissa(double val, double thresh, int precision,
-                           double one_k, std::string* mantissa,
-                           int64_t* exponent) {
-  std::stringstream mantissa_stream;
-
-  if (val < 0) {
-    mantissa_stream << "-";
-    val = -val;
-  }
-
-  // Adjust threshold so that it never excludes things which can't be rendered
-  // in 'precision' digits.
-  const double adjusted_threshold =
-      std::max(thresh, 1.0 / std::pow(10.0, precision));
-  const double big_threshold = adjusted_threshold * one_k;
-  const double small_threshold = adjusted_threshold;
-  // Values in ]simple_threshold,small_threshold[ will be printed as-is
-  const double simple_threshold = 0.01;
-
-  if (val > big_threshold) {
-    // Positive powers
-    double scaled = val;
-    for (size_t i = 0; i < arraysize(kBigSIUnits); ++i) {
-      scaled /= one_k;
-      if (scaled <= big_threshold) {
-        mantissa_stream << scaled;
-        *exponent = i + 1;
-        *mantissa = mantissa_stream.str();
-        return;
-      }
-    }
-    mantissa_stream << val;
-    *exponent = 0;
-  } else if (val < small_threshold) {
-    // Negative powers
-    if (val < simple_threshold) {
-      double scaled = val;
-      for (size_t i = 0; i < arraysize(kSmallSIUnits); ++i) {
-        scaled *= one_k;
-        if (scaled >= small_threshold) {
-          mantissa_stream << scaled;
-          *exponent = -static_cast<int64_t>(i + 1);
-          *mantissa = mantissa_stream.str();
-          return;
-        }
-      }
-    }
-    mantissa_stream << val;
-    *exponent = 0;
-  } else {
-    mantissa_stream << val;
-    *exponent = 0;
-  }
-  *mantissa = mantissa_stream.str();
-}
-
-std::string ExponentToPrefix(int64_t exponent, bool iec) {
-  if (exponent == 0) return "";
-
-  const int64_t index = (exponent > 0 ? exponent - 1 : -exponent - 1);
-  if (index >= kUnitsSize) return "";
-
-  const char* array =
-      (exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
-  if (iec)
-    return array[index] + std::string("i");
-  else
-    return std::string(1, array[index]);
-}
-
-std::string ToBinaryStringFullySpecified(double value, double threshold,
-                                         int precision, double one_k = 1024.0) {
-  std::string mantissa;
-  int64_t exponent;
-  ToExponentAndMantissa(value, threshold, precision, one_k, &mantissa,
-                        &exponent);
-  return mantissa + ExponentToPrefix(exponent, false);
-}
-
-}  // end namespace
-
-void AppendHumanReadable(int n, std::string* str) {
-  std::stringstream ss;
-  // Round down to the nearest SI prefix.
-  ss << ToBinaryStringFullySpecified(n, 1.0, 0);
-  *str += ss.str();
-}
-
-std::string HumanReadableNumber(double n, double one_k) {
-  // 1.1 means that figures up to 1.1k should be shown with the next unit down;
-  // this softens edge effects.
-  // 1 means that we should show one decimal place of precision.
-  return ToBinaryStringFullySpecified(n, 1.1, 1, one_k);
-}
-
-std::string StrFormatImp(const char* msg, va_list args) {
-  // we might need a second shot at this, so pre-emptivly make a copy
-  va_list args_cp;
-  va_copy(args_cp, args);
-
-  // TODO(ericwf): use std::array for first attempt to avoid one memory
-  // allocation guess what the size might be
-  std::array<char, 256> local_buff;
-  std::size_t size = local_buff.size();
-  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
-  // in the android-ndk
-  auto ret = vsnprintf(local_buff.data(), size, msg, args_cp);
-
-  va_end(args_cp);
-
-  // handle empty expansion
-  if (ret == 0) return std::string{};
-  if (static_cast<std::size_t>(ret) < size)
-    return std::string(local_buff.data());
-
-  // we did not provide a long enough buffer on our first attempt.
-  // add 1 to size to account for null-byte in size cast to prevent overflow
-  size = static_cast<std::size_t>(ret) + 1;
-  auto buff_ptr = std::unique_ptr<char[]>(new char[size]);
-  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
-  // in the android-ndk
-  ret = vsnprintf(buff_ptr.get(), size, msg, args);
-  return std::string(buff_ptr.get());
-}
-
-std::string StrFormat(const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  std::string tmp = StrFormatImp(format, args);
-  va_end(args);
-  return tmp;
-}
-
-void ReplaceAll(std::string* str, const std::string& from,
-                const std::string& to) {
-  std::size_t start = 0;
-  while ((start = str->find(from, start)) != std::string::npos) {
-    str->replace(start, from.length(), to);
-    start += to.length();
-  }
-}
-
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-/*
- * GNU STL in Android NDK lacks support for some C++11 functions, including
- * stoul, stoi, stod. We reimplement them here using C functions strtoul,
- * strtol, strtod. Note that reimplemented functions are in benchmark::
- * namespace, not std:: namespace.
- */
-unsigned long stoul(const std::string& str, size_t* pos, int base) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const unsigned long result = strtoul(strStart, &strEnd, base);
-
-  const int strtoulErrno = errno;
-  /* Restore previous errno */
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtoulErrno == ERANGE) {
-    throw std::out_of_range(
-      "stoul failed: " + str + " is outside of range of unsigned long");
-  } else if (strEnd == strStart || strtoulErrno != 0) {
-    throw std::invalid_argument(
-      "stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return result;
-}
-
-int stoi(const std::string& str, size_t* pos, int base) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const long result = strtol(strStart, &strEnd, base);
-
-  const int strtolErrno = errno;
-  /* Restore previous errno */
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtolErrno == ERANGE || long(int(result)) != result) {
-    throw std::out_of_range(
-      "stoul failed: " + str + " is outside of range of int");
-  } else if (strEnd == strStart || strtolErrno != 0) {
-    throw std::invalid_argument(
-      "stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return int(result);
-}
-
-double stod(const std::string& str, size_t* pos) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const double result = strtod(strStart, &strEnd);
-
-  /* Restore previous errno */
-  const int strtodErrno = errno;
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtodErrno == ERANGE) {
-    throw std::out_of_range(
-      "stoul failed: " + str + " is outside of range of int");
-  } else if (strEnd == strStart || strtodErrno != 0) {
-    throw std::invalid_argument(
-      "stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return result;
-}
-#endif
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/string_util.h b/third_party/google-benchmark/src/string_util.h
deleted file mode 100644
index fc5f8b0..0000000
--- a/third_party/google-benchmark/src/string_util.h
+++ /dev/null
@@ -1,60 +0,0 @@
-#ifndef BENCHMARK_STRING_UTIL_H_
-#define BENCHMARK_STRING_UTIL_H_
-
-#include <sstream>
-#include <string>
-#include <utility>
-#include "internal_macros.h"
-
-namespace benchmark {
-
-void AppendHumanReadable(int n, std::string* str);
-
-std::string HumanReadableNumber(double n, double one_k = 1024.0);
-
-#ifdef __GNUC__
-__attribute__((format(printf, 1, 2)))
-#endif
-std::string
-StrFormat(const char* format, ...);
-
-inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
-  return out;
-}
-
-template <class First, class... Rest>
-inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
-  out << std::forward<First>(f);
-  return StrCatImp(out, std::forward<Rest>(rest)...);
-}
-
-template <class... Args>
-inline std::string StrCat(Args&&... args) {
-  std::ostringstream ss;
-  StrCatImp(ss, std::forward<Args>(args)...);
-  return ss.str();
-}
-
-void ReplaceAll(std::string* str, const std::string& from,
-                const std::string& to);
-
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-/*
- * GNU STL in Android NDK lacks support for some C++11 functions, including
- * stoul, stoi, stod. We reimplement them here using C functions strtoul,
- * strtol, strtod. Note that reimplemented functions are in benchmark::
- * namespace, not std:: namespace.
- */
-unsigned long stoul(const std::string& str, size_t* pos = nullptr,
-                           int base = 10);
-int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
-double stod(const std::string& str, size_t* pos = nullptr);
-#else
-using std::stoul;
-using std::stoi;
-using std::stod;
-#endif
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_STRING_UTIL_H_
diff --git a/third_party/google-benchmark/src/sysinfo.cc b/third_party/google-benchmark/src/sysinfo.cc
deleted file mode 100644
index c0c07e5..0000000
--- a/third_party/google-benchmark/src/sysinfo.cc
+++ /dev/null
@@ -1,650 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <shlwapi.h>
-#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
-#include <versionhelpers.h>
-#include <windows.h>
-#include <codecvt>
-#else
-#include <fcntl.h>
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
-#include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
-    defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD
-#define BENCHMARK_HAS_SYSCTL
-#include <sys/sysctl.h>
-#endif
-#endif
-#if defined(BENCHMARK_OS_SOLARIS)
-#include <kstat.h>
-#endif
-
-#include <algorithm>
-#include <array>
-#include <bitset>
-#include <cerrno>
-#include <climits>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <sstream>
-#include <locale>
-
-#include "check.h"
-#include "cycleclock.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "sleep.h"
-#include "string_util.h"
-
-namespace benchmark {
-namespace {
-
-void PrintImp(std::ostream& out) { out << std::endl; }
-
-template <class First, class... Rest>
-void PrintImp(std::ostream& out, First&& f, Rest&&... rest) {
-  out << std::forward<First>(f);
-  PrintImp(out, std::forward<Rest>(rest)...);
-}
-
-template <class... Args>
-BENCHMARK_NORETURN void PrintErrorAndDie(Args&&... args) {
-  PrintImp(std::cerr, std::forward<Args>(args)...);
-  std::exit(EXIT_FAILURE);
-}
-
-#ifdef BENCHMARK_HAS_SYSCTL
-
-/// ValueUnion - A type used to correctly alias the byte-for-byte output of
-/// `sysctl` with the result type it's to be interpreted as.
-struct ValueUnion {
-  union DataT {
-    uint32_t uint32_value;
-    uint64_t uint64_value;
-    // For correct aliasing of union members from bytes.
-    char bytes[8];
-  };
-  using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
-
-  // The size of the data union member + its trailing array size.
-  size_t Size;
-  DataPtr Buff;
-
- public:
-  ValueUnion() : Size(0), Buff(nullptr, &std::free) {}
-
-  explicit ValueUnion(size_t BuffSize)
-      : Size(sizeof(DataT) + BuffSize),
-        Buff(::new (std::malloc(Size)) DataT(), &std::free) {}
-
-  ValueUnion(ValueUnion&& other) = default;
-
-  explicit operator bool() const { return bool(Buff); }
-
-  char* data() const { return Buff->bytes; }
-
-  std::string GetAsString() const { return std::string(data()); }
-
-  int64_t GetAsInteger() const {
-    if (Size == sizeof(Buff->uint32_value))
-      return static_cast<int32_t>(Buff->uint32_value);
-    else if (Size == sizeof(Buff->uint64_value))
-      return static_cast<int64_t>(Buff->uint64_value);
-    BENCHMARK_UNREACHABLE();
-  }
-
-  uint64_t GetAsUnsigned() const {
-    if (Size == sizeof(Buff->uint32_value))
-      return Buff->uint32_value;
-    else if (Size == sizeof(Buff->uint64_value))
-      return Buff->uint64_value;
-    BENCHMARK_UNREACHABLE();
-  }
-
-  template <class T, int N>
-  std::array<T, N> GetAsArray() {
-    const int ArrSize = sizeof(T) * N;
-    CHECK_LE(ArrSize, Size);
-    std::array<T, N> Arr;
-    std::memcpy(Arr.data(), data(), ArrSize);
-    return Arr;
-  }
-};
-
-ValueUnion GetSysctlImp(std::string const& Name) {
-#if defined BENCHMARK_OS_OPENBSD
-  int mib[2];
-
-  mib[0] = CTL_HW;
-  if ((Name == "hw.ncpu") || (Name == "hw.cpuspeed")){
-    ValueUnion buff(sizeof(int));
-
-    if (Name == "hw.ncpu") {
-      mib[1] = HW_NCPU;
-    } else {
-      mib[1] = HW_CPUSPEED;
-    }
-
-    if (sysctl(mib, 2, buff.data(), &buff.Size, nullptr, 0) == -1) {
-      return ValueUnion();
-    }
-    return buff;
-  }
-  return ValueUnion();
-#else
-  size_t CurBuffSize = 0;
-  if (sysctlbyname(Name.c_str(), nullptr, &CurBuffSize, nullptr, 0) == -1)
-    return ValueUnion();
-
-  ValueUnion buff(CurBuffSize);
-  if (sysctlbyname(Name.c_str(), buff.data(), &buff.Size, nullptr, 0) == 0)
-    return buff;
-  return ValueUnion();
-#endif
-}
-
-BENCHMARK_MAYBE_UNUSED
-bool GetSysctl(std::string const& Name, std::string* Out) {
-  Out->clear();
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  Out->assign(Buff.data());
-  return true;
-}
-
-template <class Tp,
-          class = typename std::enable_if<std::is_integral<Tp>::value>::type>
-bool GetSysctl(std::string const& Name, Tp* Out) {
-  *Out = 0;
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  *Out = static_cast<Tp>(Buff.GetAsUnsigned());
-  return true;
-}
-
-template <class Tp, size_t N>
-bool GetSysctl(std::string const& Name, std::array<Tp, N>* Out) {
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  *Out = Buff.GetAsArray<Tp, N>();
-  return true;
-}
-#endif
-
-template <class ArgT>
-bool ReadFromFile(std::string const& fname, ArgT* arg) {
-  *arg = ArgT();
-  std::ifstream f(fname.c_str());
-  if (!f.is_open()) return false;
-  f >> *arg;
-  return f.good();
-}
-
-bool CpuScalingEnabled(int num_cpus) {
-  // We don't have a valid CPU count, so don't even bother.
-  if (num_cpus <= 0) return false;
-#ifndef BENCHMARK_OS_WINDOWS
-  // On Linux, the CPUfreq subsystem exposes CPU information as files on the
-  // local file system. If reading the exported files fails, then we may not be
-  // running on Linux, so we silently ignore all the read errors.
-  std::string res;
-  for (int cpu = 0; cpu < num_cpus; ++cpu) {
-    std::string governor_file =
-        StrCat("/sys/devices/system/cpu/cpu", cpu, "/cpufreq/scaling_governor");
-    if (ReadFromFile(governor_file, &res) && res != "performance") return true;
-  }
-#endif
-  return false;
-}
-
-int CountSetBitsInCPUMap(std::string Val) {
-  auto CountBits = [](std::string Part) {
-    using CPUMask = std::bitset<sizeof(std::uintptr_t) * CHAR_BIT>;
-    Part = "0x" + Part;
-    CPUMask Mask(benchmark::stoul(Part, nullptr, 16));
-    return static_cast<int>(Mask.count());
-  };
-  size_t Pos;
-  int total = 0;
-  while ((Pos = Val.find(',')) != std::string::npos) {
-    total += CountBits(Val.substr(0, Pos));
-    Val = Val.substr(Pos + 1);
-  }
-  if (!Val.empty()) {
-    total += CountBits(Val);
-  }
-  return total;
-}
-
-BENCHMARK_MAYBE_UNUSED
-std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
-  std::vector<CPUInfo::CacheInfo> res;
-  std::string dir = "/sys/devices/system/cpu/cpu0/cache/";
-  int Idx = 0;
-  while (true) {
-    CPUInfo::CacheInfo info;
-    std::string FPath = StrCat(dir, "index", Idx++, "/");
-    std::ifstream f(StrCat(FPath, "size").c_str());
-    if (!f.is_open()) break;
-    std::string suffix;
-    f >> info.size;
-    if (f.fail())
-      PrintErrorAndDie("Failed while reading file '", FPath, "size'");
-    if (f.good()) {
-      f >> suffix;
-      if (f.bad())
-        PrintErrorAndDie(
-            "Invalid cache size format: failed to read size suffix");
-      else if (f && suffix != "K")
-        PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
-      else if (suffix == "K")
-        info.size *= 1000;
-    }
-    if (!ReadFromFile(StrCat(FPath, "type"), &info.type))
-      PrintErrorAndDie("Failed to read from file ", FPath, "type");
-    if (!ReadFromFile(StrCat(FPath, "level"), &info.level))
-      PrintErrorAndDie("Failed to read from file ", FPath, "level");
-    std::string map_str;
-    if (!ReadFromFile(StrCat(FPath, "shared_cpu_map"), &map_str))
-      PrintErrorAndDie("Failed to read from file ", FPath, "shared_cpu_map");
-    info.num_sharing = CountSetBitsInCPUMap(map_str);
-    res.push_back(info);
-  }
-
-  return res;
-}
-
-#ifdef BENCHMARK_OS_MACOSX
-std::vector<CPUInfo::CacheInfo> GetCacheSizesMacOSX() {
-  std::vector<CPUInfo::CacheInfo> res;
-  std::array<uint64_t, 4> CacheCounts{{0, 0, 0, 0}};
-  GetSysctl("hw.cacheconfig", &CacheCounts);
-
-  struct {
-    std::string name;
-    std::string type;
-    int level;
-    uint64_t num_sharing;
-  } Cases[] = {{"hw.l1dcachesize", "Data", 1, CacheCounts[1]},
-               {"hw.l1icachesize", "Instruction", 1, CacheCounts[1]},
-               {"hw.l2cachesize", "Unified", 2, CacheCounts[2]},
-               {"hw.l3cachesize", "Unified", 3, CacheCounts[3]}};
-  for (auto& C : Cases) {
-    int val;
-    if (!GetSysctl(C.name, &val)) continue;
-    CPUInfo::CacheInfo info;
-    info.type = C.type;
-    info.level = C.level;
-    info.size = val;
-    info.num_sharing = static_cast<int>(C.num_sharing);
-    res.push_back(std::move(info));
-  }
-  return res;
-}
-#elif defined(BENCHMARK_OS_WINDOWS)
-std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
-  std::vector<CPUInfo::CacheInfo> res;
-  DWORD buffer_size = 0;
-  using PInfo = SYSTEM_LOGICAL_PROCESSOR_INFORMATION;
-  using CInfo = CACHE_DESCRIPTOR;
-
-  using UPtr = std::unique_ptr<PInfo, decltype(&std::free)>;
-  GetLogicalProcessorInformation(nullptr, &buffer_size);
-  UPtr buff((PInfo*)malloc(buffer_size), &std::free);
-  if (!GetLogicalProcessorInformation(buff.get(), &buffer_size))
-    PrintErrorAndDie("Failed during call to GetLogicalProcessorInformation: ",
-                     GetLastError());
-
-  PInfo* it = buff.get();
-  PInfo* end = buff.get() + (buffer_size / sizeof(PInfo));
-
-  for (; it != end; ++it) {
-    if (it->Relationship != RelationCache) continue;
-    using BitSet = std::bitset<sizeof(ULONG_PTR) * CHAR_BIT>;
-    BitSet B(it->ProcessorMask);
-    // To prevent duplicates, only consider caches where CPU 0 is specified
-    if (!B.test(0)) continue;
-    CInfo* Cache = &it->Cache;
-    CPUInfo::CacheInfo C;
-    C.num_sharing = static_cast<int>(B.count());
-    C.level = Cache->Level;
-    C.size = Cache->Size;
-    switch (Cache->Type) {
-      case CacheUnified:
-        C.type = "Unified";
-        break;
-      case CacheInstruction:
-        C.type = "Instruction";
-        break;
-      case CacheData:
-        C.type = "Data";
-        break;
-      case CacheTrace:
-        C.type = "Trace";
-        break;
-      default:
-        C.type = "Unknown";
-        break;
-    }
-    res.push_back(C);
-  }
-  return res;
-}
-#endif
-
-std::vector<CPUInfo::CacheInfo> GetCacheSizes() {
-#ifdef BENCHMARK_OS_MACOSX
-  return GetCacheSizesMacOSX();
-#elif defined(BENCHMARK_OS_WINDOWS)
-  return GetCacheSizesWindows();
-#else
-  return GetCacheSizesFromKVFS();
-#endif
-}
-
-std::string GetSystemName() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  std::string str;
-  const unsigned COUNT = MAX_COMPUTERNAME_LENGTH+1;
-  TCHAR  hostname[COUNT] = {'\0'};
-  DWORD DWCOUNT = COUNT;
-  if (!GetComputerName(hostname, &DWCOUNT))
-    return std::string("");
-#ifndef UNICODE
-  str = std::string(hostname, DWCOUNT);
-#else
-  //Using wstring_convert, Is deprecated in C++17
-  using convert_type = std::codecvt_utf8<wchar_t>;
-  std::wstring_convert<convert_type, wchar_t> converter;
-  std::wstring wStr(hostname, DWCOUNT);
-  str = converter.to_bytes(wStr);
-#endif
-  return str;
-#else // defined(BENCHMARK_OS_WINDOWS)
-#ifdef BENCHMARK_OS_MACOSX //Mac Doesnt have HOST_NAME_MAX defined
-#define HOST_NAME_MAX 64
-#endif
-  char hostname[HOST_NAME_MAX];
-  int retVal = gethostname(hostname, HOST_NAME_MAX);
-  if (retVal != 0) return std::string("");
-  return std::string(hostname);
-#endif // Catch-all POSIX block.
-}
-
-int GetNumCPUs() {
-#ifdef BENCHMARK_HAS_SYSCTL
-  int NumCPU = -1;
-  if (GetSysctl("hw.ncpu", &NumCPU)) return NumCPU;
-  fprintf(stderr, "Err: %s\n", strerror(errno));
-  std::exit(EXIT_FAILURE);
-#elif defined(BENCHMARK_OS_WINDOWS)
-  SYSTEM_INFO sysinfo;
-  // Use memset as opposed to = {} to avoid GCC missing initializer false
-  // positives.
-  std::memset(&sysinfo, 0, sizeof(SYSTEM_INFO));
-  GetSystemInfo(&sysinfo);
-  return sysinfo.dwNumberOfProcessors;  // number of logical
-                                        // processors in the current
-                                        // group
-#elif defined(BENCHMARK_OS_SOLARIS)
-  // Returns -1 in case of a failure.
-  int NumCPU = sysconf(_SC_NPROCESSORS_ONLN);
-  if (NumCPU < 0) {
-    fprintf(stderr,
-            "sysconf(_SC_NPROCESSORS_ONLN) failed with error: %s\n",
-            strerror(errno));
-  }
-  return NumCPU;
-#else
-  int NumCPUs = 0;
-  int MaxID = -1;
-  std::ifstream f("/proc/cpuinfo");
-  if (!f.is_open()) {
-    std::cerr << "failed to open /proc/cpuinfo\n";
-    return -1;
-  }
-  const std::string Key = "processor";
-  std::string ln;
-  while (std::getline(f, ln)) {
-    if (ln.empty()) continue;
-    size_t SplitIdx = ln.find(':');
-    std::string value;
-#if defined(__s390__)
-    // s390 has another format in /proc/cpuinfo
-    // it needs to be parsed differently
-    if (SplitIdx != std::string::npos) value = ln.substr(Key.size()+1,SplitIdx-Key.size()-1);
-#else
-    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
-#endif
-    if (ln.size() >= Key.size() && ln.compare(0, Key.size(), Key) == 0) {
-      NumCPUs++;
-      if (!value.empty()) {
-        int CurID = benchmark::stoi(value);
-        MaxID = std::max(CurID, MaxID);
-      }
-    }
-  }
-  if (f.bad()) {
-    std::cerr << "Failure reading /proc/cpuinfo\n";
-    return -1;
-  }
-  if (!f.eof()) {
-    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
-    return -1;
-  }
-  f.close();
-
-  if ((MaxID + 1) != NumCPUs) {
-    fprintf(stderr,
-            "CPU ID assignments in /proc/cpuinfo seem messed up."
-            " This is usually caused by a bad BIOS.\n");
-  }
-  return NumCPUs;
-#endif
-  BENCHMARK_UNREACHABLE();
-}
-
-double GetCPUCyclesPerSecond() {
-#if defined BENCHMARK_OS_LINUX || defined BENCHMARK_OS_CYGWIN
-  long freq;
-
-  // If the kernel is exporting the tsc frequency use that. There are issues
-  // where cpuinfo_max_freq cannot be relied on because the BIOS may be
-  // exporintg an invalid p-state (on x86) or p-states may be used to put the
-  // processor in a new mode (turbo mode). Essentially, those frequencies
-  // cannot always be relied upon. The same reasons apply to /proc/cpuinfo as
-  // well.
-  if (ReadFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)
-      // If CPU scaling is in effect, we want to use the *maximum* frequency,
-      // not whatever CPU speed some random processor happens to be using now.
-      || ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
-                      &freq)) {
-    // The value is in kHz (as the file name suggests).  For example, on a
-    // 2GHz warpstation, the file contains the value "2000000".
-    return freq * 1000.0;
-  }
-
-  const double error_value = -1;
-  double bogo_clock = error_value;
-
-  std::ifstream f("/proc/cpuinfo");
-  if (!f.is_open()) {
-    std::cerr << "failed to open /proc/cpuinfo\n";
-    return error_value;
-  }
-
-  auto startsWithKey = [](std::string const& Value, std::string const& Key) {
-    if (Key.size() > Value.size()) return false;
-    auto Cmp = [&](char X, char Y) {
-      return std::tolower(X) == std::tolower(Y);
-    };
-    return std::equal(Key.begin(), Key.end(), Value.begin(), Cmp);
-  };
-
-  std::string ln;
-  while (std::getline(f, ln)) {
-    if (ln.empty()) continue;
-    size_t SplitIdx = ln.find(':');
-    std::string value;
-    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
-    // When parsing the "cpu MHz" and "bogomips" (fallback) entries, we only
-    // accept positive values. Some environments (virtual machines) report zero,
-    // which would cause infinite looping in WallTime_Init.
-    if (startsWithKey(ln, "cpu MHz")) {
-      if (!value.empty()) {
-        double cycles_per_second = benchmark::stod(value) * 1000000.0;
-        if (cycles_per_second > 0) return cycles_per_second;
-      }
-    } else if (startsWithKey(ln, "bogomips")) {
-      if (!value.empty()) {
-        bogo_clock = benchmark::stod(value) * 1000000.0;
-        if (bogo_clock < 0.0) bogo_clock = error_value;
-      }
-    }
-  }
-  if (f.bad()) {
-    std::cerr << "Failure reading /proc/cpuinfo\n";
-    return error_value;
-  }
-  if (!f.eof()) {
-    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
-    return error_value;
-  }
-  f.close();
-  // If we found the bogomips clock, but nothing better, we'll use it (but
-  // we're not happy about it); otherwise, fallback to the rough estimation
-  // below.
-  if (bogo_clock >= 0.0) return bogo_clock;
-
-#elif defined BENCHMARK_HAS_SYSCTL
-  constexpr auto* FreqStr =
-#if defined(BENCHMARK_OS_FREEBSD) || defined(BENCHMARK_OS_NETBSD)
-      "machdep.tsc_freq";
-#elif defined BENCHMARK_OS_OPENBSD
-      "hw.cpuspeed";
-#else
-      "hw.cpufrequency";
-#endif
-  unsigned long long hz = 0;
-#if defined BENCHMARK_OS_OPENBSD
-  if (GetSysctl(FreqStr, &hz)) return hz * 1000000;
-#else
-  if (GetSysctl(FreqStr, &hz)) return hz;
-#endif
-  fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
-          FreqStr, strerror(errno));
-
-#elif defined BENCHMARK_OS_WINDOWS
-  // In NT, read MHz from the registry. If we fail to do so or we're in win9x
-  // then make a crude estimate.
-  DWORD data, data_size = sizeof(data);
-  if (IsWindowsXPOrGreater() &&
-      SUCCEEDED(
-          SHGetValueA(HKEY_LOCAL_MACHINE,
-                      "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
-                      "~MHz", nullptr, &data, &data_size)))
-    return static_cast<double>((int64_t)data *
-                               (int64_t)(1000 * 1000));  // was mhz
-#elif defined (BENCHMARK_OS_SOLARIS)
-  kstat_ctl_t *kc = kstat_open();
-  if (!kc) {
-    std::cerr << "failed to open /dev/kstat\n";
-    return -1;
-  }
-  kstat_t *ksp = kstat_lookup(kc, (char*)"cpu_info", -1, (char*)"cpu_info0");
-  if (!ksp) {
-    std::cerr << "failed to lookup in /dev/kstat\n";
-    return -1;
-  }
-  if (kstat_read(kc, ksp, NULL) < 0) {
-    std::cerr << "failed to read from /dev/kstat\n";
-    return -1;
-  }
-  kstat_named_t *knp =
-      (kstat_named_t*)kstat_data_lookup(ksp, (char*)"current_clock_Hz");
-  if (!knp) {
-    std::cerr << "failed to lookup data in /dev/kstat\n";
-    return -1;
-  }
-  if (knp->data_type != KSTAT_DATA_UINT64) {
-    std::cerr << "current_clock_Hz is of unexpected data type: "
-              << knp->data_type << "\n";
-    return -1;
-  }
-  double clock_hz = knp->value.ui64;
-  kstat_close(kc);
-  return clock_hz;
-#endif
-  // If we've fallen through, attempt to roughly estimate the CPU clock rate.
-  const int estimate_time_ms = 1000;
-  const auto start_ticks = cycleclock::Now();
-  SleepForMilliseconds(estimate_time_ms);
-  return static_cast<double>(cycleclock::Now() - start_ticks);
-}
-
-std::vector<double> GetLoadAvg() {
-#if defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) || \
-    defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD ||  \
-    defined BENCHMARK_OS_OPENBSD
-  constexpr int kMaxSamples = 3;
-  std::vector<double> res(kMaxSamples, 0.0);
-  const int nelem = getloadavg(res.data(), kMaxSamples);
-  if (nelem < 1) {
-    res.clear();
-  } else {
-    res.resize(nelem);
-  }
-  return res;
-#else
-  return {};
-#endif
-}
-
-}  // end namespace
-
-const CPUInfo& CPUInfo::Get() {
-  static const CPUInfo* info = new CPUInfo();
-  return *info;
-}
-
-CPUInfo::CPUInfo()
-    : num_cpus(GetNumCPUs()),
-      cycles_per_second(GetCPUCyclesPerSecond()),
-      caches(GetCacheSizes()),
-      scaling_enabled(CpuScalingEnabled(num_cpus)),
-      load_avg(GetLoadAvg()) {}
-
-
-const SystemInfo& SystemInfo::Get() {
-  static const SystemInfo* info = new SystemInfo();
-  return *info;
-}
-
-SystemInfo::SystemInfo() : name(GetSystemName()) {}
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/thread_manager.h b/third_party/google-benchmark/src/thread_manager.h
deleted file mode 100644
index 6e274c7..0000000
--- a/third_party/google-benchmark/src/thread_manager.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#ifndef BENCHMARK_THREAD_MANAGER_H
-#define BENCHMARK_THREAD_MANAGER_H
-
-#include <atomic>
-
-#include "benchmark/benchmark.h"
-#include "mutex.h"
-
-namespace benchmark {
-namespace internal {
-
-class ThreadManager {
- public:
-  ThreadManager(int num_threads)
-      : alive_threads_(num_threads), start_stop_barrier_(num_threads) {}
-
-  Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) {
-    return benchmark_mutex_;
-  }
-
-  bool StartStopBarrier() EXCLUDES(end_cond_mutex_) {
-    return start_stop_barrier_.wait();
-  }
-
-  void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) {
-    start_stop_barrier_.removeThread();
-    if (--alive_threads_ == 0) {
-      MutexLock lock(end_cond_mutex_);
-      end_condition_.notify_all();
-    }
-  }
-
-  void WaitForAllThreads() EXCLUDES(end_cond_mutex_) {
-    MutexLock lock(end_cond_mutex_);
-    end_condition_.wait(lock.native_handle(),
-                        [this]() { return alive_threads_ == 0; });
-  }
-
- public:
-  struct Result {
-    int64_t iterations = 0;
-    double real_time_used = 0;
-    double cpu_time_used = 0;
-    double manual_time_used = 0;
-    int64_t complexity_n = 0;
-    std::string report_label_;
-    std::string error_message_;
-    bool has_error_ = false;
-    UserCounters counters;
-  };
-  GUARDED_BY(GetBenchmarkMutex()) Result results;
-
- private:
-  mutable Mutex benchmark_mutex_;
-  std::atomic<int> alive_threads_;
-  Barrier start_stop_barrier_;
-  Mutex end_cond_mutex_;
-  Condition end_condition_;
-};
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_THREAD_MANAGER_H
diff --git a/third_party/google-benchmark/src/thread_timer.h b/third_party/google-benchmark/src/thread_timer.h
deleted file mode 100644
index eaf108e..0000000
--- a/third_party/google-benchmark/src/thread_timer.h
+++ /dev/null
@@ -1,69 +0,0 @@
-#ifndef BENCHMARK_THREAD_TIMER_H
-#define BENCHMARK_THREAD_TIMER_H
-
-#include "check.h"
-#include "timers.h"
-
-namespace benchmark {
-namespace internal {
-
-class ThreadTimer {
- public:
-  ThreadTimer() = default;
-
-  // Called by each thread
-  void StartTimer() {
-    running_ = true;
-    start_real_time_ = ChronoClockNow();
-    start_cpu_time_ = ThreadCPUUsage();
-  }
-
-  // Called by each thread
-  void StopTimer() {
-    CHECK(running_);
-    running_ = false;
-    real_time_used_ += ChronoClockNow() - start_real_time_;
-    // Floating point error can result in the subtraction producing a negative
-    // time. Guard against that.
-    cpu_time_used_ += std::max<double>(ThreadCPUUsage() - start_cpu_time_, 0);
-  }
-
-  // Called by each thread
-  void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
-
-  bool running() const { return running_; }
-
-  // REQUIRES: timer is not running
-  double real_time_used() {
-    CHECK(!running_);
-    return real_time_used_;
-  }
-
-  // REQUIRES: timer is not running
-  double cpu_time_used() {
-    CHECK(!running_);
-    return cpu_time_used_;
-  }
-
-  // REQUIRES: timer is not running
-  double manual_time_used() {
-    CHECK(!running_);
-    return manual_time_used_;
-  }
-
- private:
-  bool running_ = false;        // Is the timer running
-  double start_real_time_ = 0;  // If running_
-  double start_cpu_time_ = 0;   // If running_
-
-  // Accumulated time so far (does not contain current slice if running_)
-  double real_time_used_ = 0;
-  double cpu_time_used_ = 0;
-  // Manually set iteration time. User sets this with SetIterationTime(seconds).
-  double manual_time_used_ = 0;
-};
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_THREAD_TIMER_H
diff --git a/third_party/google-benchmark/src/timers.cc b/third_party/google-benchmark/src/timers.cc
deleted file mode 100644
index 7613ff9..0000000
--- a/third_party/google-benchmark/src/timers.cc
+++ /dev/null
@@ -1,217 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "timers.h"
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <shlwapi.h>
-#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
-#include <versionhelpers.h>
-#include <windows.h>
-#else
-#include <fcntl.h>
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
-#include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX
-#include <sys/sysctl.h>
-#endif
-#if defined(BENCHMARK_OS_MACOSX)
-#include <mach/mach_init.h>
-#include <mach/mach_port.h>
-#include <mach/thread_act.h>
-#endif
-#endif
-
-#ifdef BENCHMARK_OS_EMSCRIPTEN
-#include <emscripten.h>
-#endif
-
-#include <cerrno>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <iostream>
-#include <limits>
-#include <mutex>
-
-#include "check.h"
-#include "log.h"
-#include "sleep.h"
-#include "string_util.h"
-
-namespace benchmark {
-
-// Suppress unused warnings on helper functions.
-#if defined(__GNUC__)
-#pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
-namespace {
-#if defined(BENCHMARK_OS_WINDOWS)
-double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) {
-  ULARGE_INTEGER kernel;
-  ULARGE_INTEGER user;
-  kernel.HighPart = kernel_time.dwHighDateTime;
-  kernel.LowPart = kernel_time.dwLowDateTime;
-  user.HighPart = user_time.dwHighDateTime;
-  user.LowPart = user_time.dwLowDateTime;
-  return (static_cast<double>(kernel.QuadPart) +
-          static_cast<double>(user.QuadPart)) *
-         1e-7;
-}
-#elif !defined(BENCHMARK_OS_FUCHSIA)
-double MakeTime(struct rusage const& ru) {
-  return (static_cast<double>(ru.ru_utime.tv_sec) +
-          static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 +
-          static_cast<double>(ru.ru_stime.tv_sec) +
-          static_cast<double>(ru.ru_stime.tv_usec) * 1e-6);
-}
-#endif
-#if defined(BENCHMARK_OS_MACOSX)
-double MakeTime(thread_basic_info_data_t const& info) {
-  return (static_cast<double>(info.user_time.seconds) +
-          static_cast<double>(info.user_time.microseconds) * 1e-6 +
-          static_cast<double>(info.system_time.seconds) +
-          static_cast<double>(info.system_time.microseconds) * 1e-6);
-}
-#endif
-#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID)
-double MakeTime(struct timespec const& ts) {
-  return ts.tv_sec + (static_cast<double>(ts.tv_nsec) * 1e-9);
-}
-#endif
-
-BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) {
-  std::cerr << "ERROR: " << msg << std::endl;
-  std::exit(EXIT_FAILURE);
-}
-
-}  // end namespace
-
-double ProcessCPUUsage() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  HANDLE proc = GetCurrentProcess();
-  FILETIME creation_time;
-  FILETIME exit_time;
-  FILETIME kernel_time;
-  FILETIME user_time;
-  if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time,
-                      &user_time))
-    return MakeTime(kernel_time, user_time);
-  DiagnoseAndExit("GetProccessTimes() failed");
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten.
-  // Use Emscripten-specific API. Reported CPU time would be exactly the
-  // same as total time, but this is ok because there aren't long-latency
-  // syncronous system calls in Emscripten.
-  return emscripten_get_now() * 1e-3;
-#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX)
-  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See
-  // https://github.com/google/benchmark/pull/292
-  struct timespec spec;
-  if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0)
-    return MakeTime(spec);
-  DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed");
-#else
-  struct rusage ru;
-  if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru);
-  DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed");
-#endif
-}
-
-double ThreadCPUUsage() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  HANDLE this_thread = GetCurrentThread();
-  FILETIME creation_time;
-  FILETIME exit_time;
-  FILETIME kernel_time;
-  FILETIME user_time;
-  GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time,
-                 &user_time);
-  return MakeTime(kernel_time, user_time);
-#elif defined(BENCHMARK_OS_MACOSX)
-  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See
-  // https://github.com/google/benchmark/pull/292
-  mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
-  thread_basic_info_data_t info;
-  mach_port_t thread = pthread_mach_thread_np(pthread_self());
-  if (thread_info(thread, THREAD_BASIC_INFO, (thread_info_t)&info, &count) ==
-      KERN_SUCCESS) {
-    return MakeTime(info);
-  }
-  DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info");
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // Emscripten doesn't support traditional threads
-  return ProcessCPUUsage();
-#elif defined(BENCHMARK_OS_RTEMS)
-  // RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
-  // https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
-  return ProcessCPUUsage();
-#elif defined(BENCHMARK_OS_SOLARIS)
-  struct rusage ru;
-  if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru);
-  DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed");
-#elif defined(CLOCK_THREAD_CPUTIME_ID)
-  struct timespec ts;
-  if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);
-  DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed");
-#else
-#error Per-thread timing is not available on your system.
-#endif
-}
-
-namespace {
-
-std::string DateTimeString(bool local) {
-  typedef std::chrono::system_clock Clock;
-  std::time_t now = Clock::to_time_t(Clock::now());
-  const std::size_t kStorageSize = 128;
-  char storage[kStorageSize];
-  std::size_t written;
-
-  if (local) {
-#if defined(BENCHMARK_OS_WINDOWS)
-    written =
-        std::strftime(storage, sizeof(storage), "%x %X", ::localtime(&now));
-#else
-    std::tm timeinfo;
-    ::localtime_r(&now, &timeinfo);
-    written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo);
-#endif
-  } else {
-#if defined(BENCHMARK_OS_WINDOWS)
-    written = std::strftime(storage, sizeof(storage), "%x %X", ::gmtime(&now));
-#else
-    std::tm timeinfo;
-    ::gmtime_r(&now, &timeinfo);
-    written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo);
-#endif
-  }
-  CHECK(written < kStorageSize);
-  ((void)written);  // prevent unused variable in optimized mode.
-  return std::string(storage);
-}
-
-}  // end namespace
-
-std::string LocalDateTimeString() { return DateTimeString(true); }
-
-}  // end namespace benchmark
diff --git a/third_party/google-benchmark/src/timers.h b/third_party/google-benchmark/src/timers.h
deleted file mode 100644
index 65606cc..0000000
--- a/third_party/google-benchmark/src/timers.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#ifndef BENCHMARK_TIMERS_H
-#define BENCHMARK_TIMERS_H
-
-#include <chrono>
-#include <string>
-
-namespace benchmark {
-
-// Return the CPU usage of the current process
-double ProcessCPUUsage();
-
-// Return the CPU usage of the children of the current process
-double ChildrenCPUUsage();
-
-// Return the CPU usage of the current thread
-double ThreadCPUUsage();
-
-#if defined(HAVE_STEADY_CLOCK)
-template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
-struct ChooseSteadyClock {
-  typedef std::chrono::high_resolution_clock type;
-};
-
-template <>
-struct ChooseSteadyClock<false> {
-  typedef std::chrono::steady_clock type;
-};
-#endif
-
-struct ChooseClockType {
-#if defined(HAVE_STEADY_CLOCK)
-  typedef ChooseSteadyClock<>::type type;
-#else
-  typedef std::chrono::high_resolution_clock type;
-#endif
-};
-
-inline double ChronoClockNow() {
-  typedef ChooseClockType::type ClockType;
-  using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
-  return FpSeconds(ClockType::now().time_since_epoch()).count();
-}
-
-std::string LocalDateTimeString();
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_TIMERS_H
diff --git a/third_party/google-benchmark/test/AssemblyTests.cmake b/third_party/google-benchmark/test/AssemblyTests.cmake
deleted file mode 100644
index 3d07858..0000000
--- a/third_party/google-benchmark/test/AssemblyTests.cmake
+++ /dev/null
@@ -1,46 +0,0 @@
-
-include(split_list)
-
-set(ASM_TEST_FLAGS "")
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-if (BENCHMARK_HAS_O3_FLAG)
-  list(APPEND ASM_TEST_FLAGS -O3)
-endif()
-
-check_cxx_compiler_flag(-g0 BENCHMARK_HAS_G0_FLAG)
-if (BENCHMARK_HAS_G0_FLAG)
-  list(APPEND ASM_TEST_FLAGS -g0)
-endif()
-
-check_cxx_compiler_flag(-fno-stack-protector BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
-if (BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
-  list(APPEND ASM_TEST_FLAGS -fno-stack-protector)
-endif()
-
-split_list(ASM_TEST_FLAGS)
-string(TOUPPER "${CMAKE_CXX_COMPILER_ID}" ASM_TEST_COMPILER)
-
-macro(add_filecheck_test name)
-  cmake_parse_arguments(ARG "" "" "CHECK_PREFIXES" ${ARGV})
-  add_library(${name} OBJECT ${name}.cc)
-  set_target_properties(${name} PROPERTIES COMPILE_FLAGS "-S ${ASM_TEST_FLAGS}")
-  set(ASM_OUTPUT_FILE "${CMAKE_CURRENT_BINARY_DIR}/${name}.s")
-  add_custom_target(copy_${name} ALL
-      COMMAND ${PROJECT_SOURCE_DIR}/tools/strip_asm.py
-        $<TARGET_OBJECTS:${name}>
-        ${ASM_OUTPUT_FILE}
-      BYPRODUCTS ${ASM_OUTPUT_FILE})
-  add_dependencies(copy_${name} ${name})
-  if (NOT ARG_CHECK_PREFIXES)
-    set(ARG_CHECK_PREFIXES "CHECK")
-  endif()
-  foreach(prefix ${ARG_CHECK_PREFIXES})
-    add_test(NAME run_${name}_${prefix}
-        COMMAND
-          ${LLVM_FILECHECK_EXE} ${name}.cc
-          --input-file=${ASM_OUTPUT_FILE}
-          --check-prefixes=CHECK,CHECK-${ASM_TEST_COMPILER}
-        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-  endforeach()
-endmacro()
-
diff --git a/third_party/google-benchmark/test/BUILD b/third_party/google-benchmark/test/BUILD
deleted file mode 100644
index 4ab8633..0000000
--- a/third_party/google-benchmark/test/BUILD
+++ /dev/null
@@ -1,71 +0,0 @@
-TEST_COPTS = [
-    "-pedantic",
-    "-pedantic-errors",
-    "-std=c++11",
-    "-Wall",
-    "-Wextra",
-    "-Wshadow",
-    #    "-Wshorten-64-to-32",
-    "-Wfloat-equal",
-    "-fstrict-aliasing",
-]
-
-PER_SRC_COPTS = {
-    "cxx03_test.cc": ["-std=c++03"],
-    # Some of the issues with DoNotOptimize only occur when optimization is enabled
-    "donotoptimize_test.cc": ["-O3"],
-}
-
-TEST_ARGS = ["--benchmark_min_time=0.01"]
-
-PER_SRC_TEST_ARGS = {
-    "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
-}
-
-cc_library(
-    name = "output_test_helper",
-    testonly = 1,
-    srcs = ["output_test_helper.cc"],
-    hdrs = ["output_test.h"],
-    copts = TEST_COPTS,
-    deps = [
-        "//:benchmark",
-        "//:benchmark_internal_headers",
-    ],
-)
-
-[
-    cc_test(
-        name = test_src[:-len(".cc")],
-        size = "small",
-        srcs = [test_src],
-        args = TEST_ARGS + PER_SRC_TEST_ARGS.get(test_src, []),
-        copts = TEST_COPTS + PER_SRC_COPTS.get(test_src, []),
-        deps = [
-            ":output_test_helper",
-            "//:benchmark",
-            "//:benchmark_internal_headers",
-            "@com_google_googletest//:gtest",
-        ] + (
-            ["@com_google_googletest//:gtest_main"] if (test_src[-len("gtest.cc"):] == "gtest.cc") else []
-        ),
-        # FIXME: Add support for assembly tests to bazel.
-        # See Issue #556
-        # https://github.com/google/benchmark/issues/556
-    )
-    for test_src in glob(
-        ["*test.cc"],
-        exclude = [
-            "*_assembly_test.cc",
-            "link_main_test.cc",
-        ],
-    )
-]
-
-cc_test(
-    name = "link_main_test",
-    size = "small",
-    srcs = ["link_main_test.cc"],
-    copts = TEST_COPTS,
-    deps = ["//:benchmark_main"],
-)
diff --git a/third_party/google-benchmark/test/CMakeLists.txt b/third_party/google-benchmark/test/CMakeLists.txt
deleted file mode 100644
index f15ce20..0000000
--- a/third_party/google-benchmark/test/CMakeLists.txt
+++ /dev/null
@@ -1,260 +0,0 @@
-# Enable the tests
-
-find_package(Threads REQUIRED)
-include(CheckCXXCompilerFlag)
-
-# NOTE: Some tests use `<cassert>` to perform the test. Therefore we must
-# strip -DNDEBUG from the default CMake flags in DEBUG mode.
-string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
-if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
-  add_definitions( -UNDEBUG )
-  add_definitions(-DTEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS)
-  # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
-  foreach (flags_var_to_scrub
-      CMAKE_CXX_FLAGS_RELEASE
-      CMAKE_CXX_FLAGS_RELWITHDEBINFO
-      CMAKE_CXX_FLAGS_MINSIZEREL
-      CMAKE_C_FLAGS_RELEASE
-      CMAKE_C_FLAGS_RELWITHDEBINFO
-      CMAKE_C_FLAGS_MINSIZEREL)
-    string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
-      "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
-  endforeach()
-endif()
-
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-set(BENCHMARK_O3_FLAG "")
-if (BENCHMARK_HAS_O3_FLAG)
-  set(BENCHMARK_O3_FLAG "-O3")
-endif()
-
-# NOTE: These flags must be added after find_package(Threads REQUIRED) otherwise
-# they will break the configuration check.
-if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
-  list(APPEND CMAKE_EXE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-endif()
-
-add_library(output_test_helper STATIC output_test_helper.cc output_test.h)
-
-macro(compile_benchmark_test name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark ${CMAKE_THREAD_LIBS_INIT})
-endmacro(compile_benchmark_test)
-
-macro(compile_benchmark_test_with_main name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark_main)
-endmacro(compile_benchmark_test_with_main)
-
-macro(compile_output_test name)
-  add_executable(${name} "${name}.cc" output_test.h)
-  target_link_libraries(${name} output_test_helper benchmark
-          ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-endmacro(compile_output_test)
-
-# Demonstration executable
-compile_benchmark_test(benchmark_test)
-add_test(benchmark benchmark_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(filter_test)
-macro(add_filter_test name filter expect)
-  add_test(${name} filter_test --benchmark_min_time=0.01 --benchmark_filter=${filter} ${expect})
-  add_test(${name}_list_only filter_test --benchmark_list_tests --benchmark_filter=${filter} ${expect})
-endmacro(add_filter_test)
-
-add_filter_test(filter_simple "Foo" 3)
-add_filter_test(filter_simple_negative "-Foo" 2)
-add_filter_test(filter_suffix "BM_.*" 4)
-add_filter_test(filter_suffix_negative "-BM_.*" 1)
-add_filter_test(filter_regex_all ".*" 5)
-add_filter_test(filter_regex_all_negative "-.*" 0)
-add_filter_test(filter_regex_blank "" 5)
-add_filter_test(filter_regex_blank_negative "-" 0)
-add_filter_test(filter_regex_none "monkey" 0)
-add_filter_test(filter_regex_none_negative "-monkey" 5)
-add_filter_test(filter_regex_wildcard ".*Foo.*" 3)
-add_filter_test(filter_regex_wildcard_negative "-.*Foo.*" 2)
-add_filter_test(filter_regex_begin "^BM_.*" 4)
-add_filter_test(filter_regex_begin_negative "-^BM_.*" 1)
-add_filter_test(filter_regex_begin2 "^N" 1)
-add_filter_test(filter_regex_begin2_negative "-^N" 4)
-add_filter_test(filter_regex_end ".*Ba$" 1)
-add_filter_test(filter_regex_end_negative "-.*Ba$" 4)
-
-compile_benchmark_test(options_test)
-add_test(options_benchmarks options_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(basic_test)
-add_test(basic_benchmark basic_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(diagnostics_test)
-add_test(diagnostics_test diagnostics_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(skip_with_error_test)
-add_test(skip_with_error_test skip_with_error_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(donotoptimize_test)
-# Some of the issues with DoNotOptimize only occur when optimization is enabled
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-if (BENCHMARK_HAS_O3_FLAG)
-  set_target_properties(donotoptimize_test PROPERTIES COMPILE_FLAGS "-O3")
-endif()
-add_test(donotoptimize_test donotoptimize_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(fixture_test)
-add_test(fixture_test fixture_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(register_benchmark_test)
-add_test(register_benchmark_test register_benchmark_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(map_test)
-add_test(map_test map_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(multiple_ranges_test)
-add_test(multiple_ranges_test multiple_ranges_test --benchmark_min_time=0.01)
-
-compile_benchmark_test_with_main(link_main_test)
-add_test(link_main_test link_main_test --benchmark_min_time=0.01)
-
-compile_output_test(reporter_output_test)
-add_test(reporter_output_test reporter_output_test --benchmark_min_time=0.01)
-
-compile_output_test(templated_fixture_test)
-add_test(templated_fixture_test templated_fixture_test --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_test)
-add_test(user_counters_test user_counters_test --benchmark_min_time=0.01)
-
-compile_output_test(report_aggregates_only_test)
-add_test(report_aggregates_only_test report_aggregates_only_test --benchmark_min_time=0.01)
-
-compile_output_test(display_aggregates_only_test)
-add_test(display_aggregates_only_test display_aggregates_only_test --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_tabular_test)
-add_test(user_counters_tabular_test user_counters_tabular_test --benchmark_counters_tabular=true --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_thousands_test)
-add_test(user_counters_thousands_test user_counters_thousands_test --benchmark_min_time=0.01)
-
-compile_output_test(memory_manager_test)
-add_test(memory_manager_test memory_manager_test --benchmark_min_time=0.01)
-
-check_cxx_compiler_flag(-std=c++03 BENCHMARK_HAS_CXX03_FLAG)
-if (BENCHMARK_HAS_CXX03_FLAG)
-  compile_benchmark_test(cxx03_test)
-  set_target_properties(cxx03_test
-      PROPERTIES
-      COMPILE_FLAGS "-std=c++03")
-  # libstdc++ provides different definitions within <map> between dialects. When
-  # LTO is enabled and -Werror is specified GCC diagnoses this ODR violation
-  # causing the test to fail to compile. To prevent this we explicitly disable
-  # the warning.
-  check_cxx_compiler_flag(-Wno-odr BENCHMARK_HAS_WNO_ODR)
-  if (BENCHMARK_ENABLE_LTO AND BENCHMARK_HAS_WNO_ODR)
-    set_target_properties(cxx03_test
-        PROPERTIES
-        LINK_FLAGS "-Wno-odr")
-  endif()
-  add_test(cxx03 cxx03_test --benchmark_min_time=0.01)
-endif()
-
-# Attempt to work around flaky test failures when running on Appveyor servers.
-if (DEFINED ENV{APPVEYOR})
-  set(COMPLEXITY_MIN_TIME "0.5")
-else()
-  set(COMPLEXITY_MIN_TIME "0.01")
-endif()
-compile_output_test(complexity_test)
-add_test(complexity_benchmark complexity_test --benchmark_min_time=${COMPLEXITY_MIN_TIME})
-
-###############################################################################
-# GoogleTest Unit Tests
-###############################################################################
-
-if (BENCHMARK_ENABLE_GTEST_TESTS)
-  macro(compile_gtest name)
-    add_executable(${name} "${name}.cc")
-    if (TARGET googletest)
-      add_dependencies(${name} googletest)
-    endif()
-    if (GTEST_INCLUDE_DIRS)
-      target_include_directories(${name} PRIVATE ${GTEST_INCLUDE_DIRS})
-    endif()
-    target_link_libraries(${name} benchmark
-        ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-  endmacro(compile_gtest)
-
-  macro(add_gtest name)
-    compile_gtest(${name})
-    add_test(${name} ${name})
-  endmacro()
-
-  add_gtest(benchmark_gtest)
-  add_gtest(statistics_gtest)
-  add_gtest(string_util_gtest)
-endif(BENCHMARK_ENABLE_GTEST_TESTS)
-
-###############################################################################
-# Assembly Unit Tests
-###############################################################################
-
-if (BENCHMARK_ENABLE_ASSEMBLY_TESTS)
-  if (NOT LLVM_FILECHECK_EXE)
-    message(FATAL_ERROR "LLVM FileCheck is required when including this file")
-  endif()
-  include(AssemblyTests.cmake)
-  add_filecheck_test(donotoptimize_assembly_test)
-  add_filecheck_test(state_assembly_test)
-  add_filecheck_test(clobber_memory_assembly_test)
-endif()
-
-
-
-###############################################################################
-# Code Coverage Configuration
-###############################################################################
-
-# Add the coverage command(s)
-if(CMAKE_BUILD_TYPE)
-  string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
-endif()
-if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
-  find_program(GCOV gcov)
-  find_program(LCOV lcov)
-  find_program(GENHTML genhtml)
-  find_program(CTEST ctest)
-  if (GCOV AND LCOV AND GENHTML AND CTEST AND HAVE_CXX_FLAG_COVERAGE)
-    add_custom_command(
-      OUTPUT ${CMAKE_BINARY_DIR}/lcov/index.html
-      COMMAND ${LCOV} -q -z -d .
-      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o before.lcov -i
-      COMMAND ${CTEST} --force-new-ctest-process
-      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
-      COMMAND ${LCOV} -q -a before.lcov -a after.lcov --output-file final.lcov
-      COMMAND ${LCOV} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
-      COMMAND ${GENHTML} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_BINARY_DIR}" -t benchmark
-      DEPENDS filter_test benchmark_test options_test basic_test fixture_test cxx03_test complexity_test
-      WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-      COMMENT "Running LCOV"
-    )
-    add_custom_target(coverage
-      DEPENDS ${CMAKE_BINARY_DIR}/lcov/index.html
-      COMMENT "LCOV report at lcov/index.html"
-    )
-    message(STATUS "Coverage command added")
-  else()
-    if (HAVE_CXX_FLAG_COVERAGE)
-      set(CXX_FLAG_COVERAGE_MESSAGE supported)
-    else()
-      set(CXX_FLAG_COVERAGE_MESSAGE unavailable)
-    endif()
-    message(WARNING
-      "Coverage not available:\n"
-      "  gcov: ${GCOV}\n"
-      "  lcov: ${LCOV}\n"
-      "  genhtml: ${GENHTML}\n"
-      "  ctest: ${CTEST}\n"
-      "  --coverage flag: ${CXX_FLAG_COVERAGE_MESSAGE}")
-  endif()
-endif()
diff --git a/third_party/google-benchmark/test/basic_test.cc b/third_party/google-benchmark/test/basic_test.cc
deleted file mode 100644
index d07fbc0..0000000
--- a/third_party/google-benchmark/test/basic_test.cc
+++ /dev/null
@@ -1,136 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#define BASIC_BENCHMARK_TEST(x) BENCHMARK(x)->Arg(8)->Arg(512)->Arg(8192)
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
-BENCHMARK(BM_empty)->ThreadPerCpu();
-
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_empty);
-BASIC_BENCHMARK_TEST(BM_spin_empty)->ThreadPerCpu();
-
-void BM_spin_pause_before(benchmark::State& state) {
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_before);
-BASIC_BENCHMARK_TEST(BM_spin_pause_before)->ThreadPerCpu();
-
-void BM_spin_pause_during(benchmark::State& state) {
-  for (auto _ : state) {
-    state.PauseTiming();
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-    state.ResumeTiming();
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_during);
-BASIC_BENCHMARK_TEST(BM_spin_pause_during)->ThreadPerCpu();
-
-void BM_pause_during(benchmark::State& state) {
-  for (auto _ : state) {
-    state.PauseTiming();
-    state.ResumeTiming();
-  }
-}
-BENCHMARK(BM_pause_during);
-BENCHMARK(BM_pause_during)->ThreadPerCpu();
-BENCHMARK(BM_pause_during)->UseRealTime();
-BENCHMARK(BM_pause_during)->UseRealTime()->ThreadPerCpu();
-
-void BM_spin_pause_after(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_after);
-BASIC_BENCHMARK_TEST(BM_spin_pause_after)->ThreadPerCpu();
-
-void BM_spin_pause_before_and_after(benchmark::State& state) {
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after);
-BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after)->ThreadPerCpu();
-
-void BM_empty_stop_start(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_empty_stop_start);
-BENCHMARK(BM_empty_stop_start)->ThreadPerCpu();
-
-
-void BM_KeepRunning(benchmark::State& state) {
-  size_t iter_count = 0;
-  assert(iter_count == state.iterations());
-  while (state.KeepRunning()) {
-    ++iter_count;
-  }
-  assert(iter_count == state.iterations());
-}
-BENCHMARK(BM_KeepRunning);
-
-void BM_KeepRunningBatch(benchmark::State& state) {
-  // Choose a prime batch size to avoid evenly dividing max_iterations.
-  const size_t batch_size = 101;
-  size_t iter_count = 0;
-  while (state.KeepRunningBatch(batch_size)) {
-    iter_count += batch_size;
-  }
-  assert(state.iterations() == iter_count);
-}
-BENCHMARK(BM_KeepRunningBatch);
-
-void BM_RangedFor(benchmark::State& state) {
-  size_t iter_count = 0;
-  for (auto _ : state) {
-    ++iter_count;
-  }
-  assert(iter_count == state.max_iterations);
-}
-BENCHMARK(BM_RangedFor);
-
-// Ensure that StateIterator provides all the necessary typedefs required to
-// instantiate std::iterator_traits.
-static_assert(std::is_same<
-  typename std::iterator_traits<benchmark::State::StateIterator>::value_type,
-  typename benchmark::State::StateIterator::value_type>::value, "");
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/benchmark_gtest.cc b/third_party/google-benchmark/test/benchmark_gtest.cc
deleted file mode 100644
index 10683b4..0000000
--- a/third_party/google-benchmark/test/benchmark_gtest.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-#include <vector>
-
-#include "../src/benchmark_register.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(AddRangeTest, Simple) {
-  std::vector<int> dst;
-  AddRange(&dst, 1, 2, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
-}
-
-TEST(AddRangeTest, Simple64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, static_cast<int64_t>(1), static_cast<int64_t>(2), 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
-}
-
-TEST(AddRangeTest, Advanced) {
-  std::vector<int> dst;
-  AddRange(&dst, 5, 15, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
-}
-
-TEST(AddRangeTest, Advanced64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, static_cast<int64_t>(5), static_cast<int64_t>(15), 2);
-  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
-}
-
-}  // end namespace
diff --git a/third_party/google-benchmark/test/benchmark_test.cc b/third_party/google-benchmark/test/benchmark_test.cc
deleted file mode 100644
index 3cd4f55..0000000
--- a/third_party/google-benchmark/test/benchmark_test.cc
+++ /dev/null
@@ -1,245 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <assert.h>
-#include <math.h>
-#include <stdint.h>
-
-#include <chrono>
-#include <cstdlib>
-#include <iostream>
-#include <limits>
-#include <list>
-#include <map>
-#include <mutex>
-#include <set>
-#include <sstream>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-#if defined(__GNUC__)
-#define BENCHMARK_NOINLINE __attribute__((noinline))
-#else
-#define BENCHMARK_NOINLINE
-#endif
-
-namespace {
-
-int BENCHMARK_NOINLINE Factorial(uint32_t n) {
-  return (n == 1) ? 1 : n * Factorial(n - 1);
-}
-
-double CalculatePi(int depth) {
-  double pi = 0.0;
-  for (int i = 0; i < depth; ++i) {
-    double numerator = static_cast<double>(((i % 2) * 2) - 1);
-    double denominator = static_cast<double>((2 * i) - 1);
-    pi += numerator / denominator;
-  }
-  return (pi - 1.0) * 4;
-}
-
-std::set<int64_t> ConstructRandomSet(int64_t size) {
-  std::set<int64_t> s;
-  for (int i = 0; i < size; ++i) s.insert(s.end(), i);
-  return s;
-}
-
-std::mutex test_vector_mu;
-std::vector<int>* test_vector = nullptr;
-
-}  // end namespace
-
-static void BM_Factorial(benchmark::State& state) {
-  int fac_42 = 0;
-  for (auto _ : state) fac_42 = Factorial(8);
-  // Prevent compiler optimizations
-  std::stringstream ss;
-  ss << fac_42;
-  state.SetLabel(ss.str());
-}
-BENCHMARK(BM_Factorial);
-BENCHMARK(BM_Factorial)->UseRealTime();
-
-static void BM_CalculatePiRange(benchmark::State& state) {
-  double pi = 0.0;
-  for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
-  std::stringstream ss;
-  ss << pi;
-  state.SetLabel(ss.str());
-}
-BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
-
-static void BM_CalculatePi(benchmark::State& state) {
-  static const int depth = 1024;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(CalculatePi(static_cast<int>(depth)));
-  }
-}
-BENCHMARK(BM_CalculatePi)->Threads(8);
-BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
-BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
-
-static void BM_SetInsert(benchmark::State& state) {
-  std::set<int64_t> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j) data.insert(rand());
-  }
-  state.SetItemsProcessed(state.iterations() * state.range(1));
-  state.SetBytesProcessed(state.iterations() * state.range(1) * sizeof(int));
-}
-
-// Test many inserts at once to reduce the total iterations needed. Otherwise, the slower,
-// non-timed part of each iteration will make the benchmark take forever.
-BENCHMARK(BM_SetInsert)->Ranges({{1 << 10, 8 << 10}, {128, 512}});
-
-template <typename Container,
-          typename ValueType = typename Container::value_type>
-static void BM_Sequential(benchmark::State& state) {
-  ValueType v = 42;
-  for (auto _ : state) {
-    Container c;
-    for (int64_t i = state.range(0); --i;) c.push_back(v);
-  }
-  const int64_t items_processed = state.iterations() * state.range(0);
-  state.SetItemsProcessed(items_processed);
-  state.SetBytesProcessed(items_processed * sizeof(v));
-}
-BENCHMARK_TEMPLATE2(BM_Sequential, std::vector<int>, int)
-    ->Range(1 << 0, 1 << 10);
-BENCHMARK_TEMPLATE(BM_Sequential, std::list<int>)->Range(1 << 0, 1 << 10);
-// Test the variadic version of BENCHMARK_TEMPLATE in C++11 and beyond.
-#ifdef BENCHMARK_HAS_CXX11
-BENCHMARK_TEMPLATE(BM_Sequential, std::vector<int>, int)->Arg(512);
-#endif
-
-static void BM_StringCompare(benchmark::State& state) {
-  size_t len = static_cast<size_t>(state.range(0));
-  std::string s1(len, '-');
-  std::string s2(len, '-');
-  for (auto _ : state) benchmark::DoNotOptimize(s1.compare(s2));
-}
-BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
-
-static void BM_SetupTeardown(benchmark::State& state) {
-  if (state.thread_index == 0) {
-    // No need to lock test_vector_mu here as this is running single-threaded.
-    test_vector = new std::vector<int>();
-  }
-  int i = 0;
-  for (auto _ : state) {
-    std::lock_guard<std::mutex> l(test_vector_mu);
-    if (i % 2 == 0)
-      test_vector->push_back(i);
-    else
-      test_vector->pop_back();
-    ++i;
-  }
-  if (state.thread_index == 0) {
-    delete test_vector;
-  }
-}
-BENCHMARK(BM_SetupTeardown)->ThreadPerCpu();
-
-static void BM_LongTest(benchmark::State& state) {
-  double tracker = 0.0;
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i)
-      benchmark::DoNotOptimize(tracker += i);
-  }
-}
-BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
-
-static void BM_ParallelMemset(benchmark::State& state) {
-  int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
-  int thread_size = static_cast<int>(size) / state.threads;
-  int from = thread_size * state.thread_index;
-  int to = from + thread_size;
-
-  if (state.thread_index == 0) {
-    test_vector = new std::vector<int>(static_cast<size_t>(size));
-  }
-
-  for (auto _ : state) {
-    for (int i = from; i < to; i++) {
-      // No need to lock test_vector_mu as ranges
-      // do not overlap between threads.
-      benchmark::DoNotOptimize(test_vector->at(i) = 1);
-    }
-  }
-
-  if (state.thread_index == 0) {
-    delete test_vector;
-  }
-}
-BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
-
-static void BM_ManualTiming(benchmark::State& state) {
-  int64_t slept_for = 0;
-  int64_t microseconds = state.range(0);
-  std::chrono::duration<double, std::micro> sleep_duration{
-      static_cast<double>(microseconds)};
-
-  for (auto _ : state) {
-    auto start = std::chrono::high_resolution_clock::now();
-    // Simulate some useful workload with a sleep
-    std::this_thread::sleep_for(
-        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
-    auto end = std::chrono::high_resolution_clock::now();
-
-    auto elapsed =
-        std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
-
-    state.SetIterationTime(elapsed.count());
-    slept_for += microseconds;
-  }
-  state.SetItemsProcessed(slept_for);
-}
-BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseRealTime();
-BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseManualTime();
-
-#ifdef BENCHMARK_HAS_CXX11
-
-template <class... Args>
-void BM_with_args(benchmark::State& state, Args&&...) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK_CAPTURE(BM_with_args, int_test, 42, 43, 44);
-BENCHMARK_CAPTURE(BM_with_args, string_and_pair_test, std::string("abc"),
-                  std::pair<int, double>(42, 3.8));
-
-void BM_non_template_args(benchmark::State& state, int, double) {
-  while(state.KeepRunning()) {}
-}
-BENCHMARK_CAPTURE(BM_non_template_args, basic_test, 0, 0);
-
-#endif  // BENCHMARK_HAS_CXX11
-
-static void BM_DenseThreadRanges(benchmark::State& st) {
-  switch (st.range(0)) {
-    case 1:
-      assert(st.threads == 1 || st.threads == 2 || st.threads == 3);
-      break;
-    case 2:
-      assert(st.threads == 1 || st.threads == 3 || st.threads == 4);
-      break;
-    case 3:
-      assert(st.threads == 5 || st.threads == 8 || st.threads == 11 ||
-             st.threads == 14);
-      break;
-    default:
-      assert(false && "Invalid test case number");
-  }
-  while (st.KeepRunning()) {
-  }
-}
-BENCHMARK(BM_DenseThreadRanges)->Arg(1)->DenseThreadRange(1, 3);
-BENCHMARK(BM_DenseThreadRanges)->Arg(2)->DenseThreadRange(1, 4, 2);
-BENCHMARK(BM_DenseThreadRanges)->Arg(3)->DenseThreadRange(5, 14, 3);
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/clobber_memory_assembly_test.cc b/third_party/google-benchmark/test/clobber_memory_assembly_test.cc
deleted file mode 100644
index f41911a..0000000
--- a/third_party/google-benchmark/test/clobber_memory_assembly_test.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-extern "C" {
-
-extern int ExternInt;
-extern int ExternInt2;
-extern int ExternInt3;
-
-}
-
-// CHECK-LABEL: test_basic:
-extern "C" void test_basic() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = 101;
-  benchmark::ClobberMemory();
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: movl $101, [[DEST]]
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_redundant_store:
-extern "C" void test_redundant_store() {
-  ExternInt = 3;
-  benchmark::ClobberMemory();
-  ExternInt = 51;
-  // CHECK-DAG: ExternInt
-  // CHECK-DAG: movl $3
-  // CHECK: movl $51
-}
-
-// CHECK-LABEL: test_redundant_read:
-extern "C" void test_redundant_read() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = ExternInt;
-  benchmark::ClobberMemory();
-  x = ExternInt2;
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK-NOT: ExternInt2
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_redundant_read2:
-extern "C" void test_redundant_read2() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = ExternInt;
-  benchmark::ClobberMemory();
-  x = ExternInt2;
-  benchmark::ClobberMemory();
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK: ExternInt2(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK: ret
-}
diff --git a/third_party/google-benchmark/test/complexity_test.cc b/third_party/google-benchmark/test/complexity_test.cc
deleted file mode 100644
index 323ddfe..0000000
--- a/third_party/google-benchmark/test/complexity_test.cc
+++ /dev/null
@@ -1,183 +0,0 @@
-#undef NDEBUG
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <cstdlib>
-#include <vector>
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-namespace {
-
-#define ADD_COMPLEXITY_CASES(...) \
-  int CONCAT(dummy, __LINE__) = AddComplexityTest(__VA_ARGS__)
-
-int AddComplexityTest(std::string test_name, std::string big_o_test_name,
-                      std::string rms_test_name, std::string big_o) {
-  SetSubstitutions({{"%name", test_name},
-                    {"%bigo_name", big_o_test_name},
-                    {"%rms_name", rms_test_name},
-                    {"%bigo_str", "[ ]* %float " + big_o},
-                    {"%bigo", big_o},
-                    {"%rms", "[ ]*[0-9]+ %"}});
-  AddCases(
-      TC_ConsoleOut,
-      {{"^%bigo_name %bigo_str %bigo_str[ ]*$"},
-       {"^%bigo_name", MR_Not},  // Assert we we didn't only matched a name.
-       {"^%rms_name %rms %rms[ ]*$", MR_Next}});
-  AddCases(TC_JSONOut, {{"\"name\": \"%bigo_name\",$"},
-                        {"\"run_name\": \"%name\",$", MR_Next},
-                        {"\"run_type\": \"aggregate\",$", MR_Next},
-                        {"\"aggregate_name\": \"BigO\",$", MR_Next},
-                        {"\"cpu_coefficient\": %float,$", MR_Next},
-                        {"\"real_coefficient\": %float,$", MR_Next},
-                        {"\"big_o\": \"%bigo\",$", MR_Next},
-                        {"\"time_unit\": \"ns\"$", MR_Next},
-                        {"}", MR_Next},
-                        {"\"name\": \"%rms_name\",$"},
-                        {"\"run_name\": \"%name\",$", MR_Next},
-                        {"\"run_type\": \"aggregate\",$", MR_Next},
-                        {"\"aggregate_name\": \"RMS\",$", MR_Next},
-                        {"\"rms\": %float$", MR_Next},
-                        {"}", MR_Next}});
-  AddCases(TC_CSVOut, {{"^\"%bigo_name\",,%float,%float,%bigo,,,,,$"},
-                       {"^\"%bigo_name\"", MR_Not},
-                       {"^\"%rms_name\",,%float,%float,,,,,,$", MR_Next}});
-  return 0;
-}
-
-}  // end namespace
-
-// ========================================================================= //
-// --------------------------- Testing BigO O(1) --------------------------- //
-// ========================================================================= //
-
-void BM_Complexity_O1(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int i = 0; i < 1024; ++i) {
-      benchmark::DoNotOptimize(&i);
-    }
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity();
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity([](int64_t) {
-  return 1.0;
-});
-
-const char *one_test_name = "BM_Complexity_O1";
-const char *big_o_1_test_name = "BM_Complexity_O1_BigO";
-const char *rms_o_1_test_name = "BM_Complexity_O1_RMS";
-const char *enum_big_o_1 = "\\([0-9]+\\)";
-// FIXME: Tolerate both '(1)' and 'lgN' as output when the complexity is auto
-// deduced.
-// See https://github.com/google/benchmark/issues/272
-const char *auto_big_o_1 = "(\\([0-9]+\\))|(lgN)";
-const char *lambda_big_o_1 = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     enum_big_o_1);
-
-// Add auto enum tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     auto_big_o_1);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     lambda_big_o_1);
-
-// ========================================================================= //
-// --------------------------- Testing BigO O(N) --------------------------- //
-// ========================================================================= //
-
-std::vector<int> ConstructRandomVector(int64_t size) {
-  std::vector<int> v;
-  v.reserve(static_cast<int>(size));
-  for (int i = 0; i < size; ++i) {
-    v.push_back(static_cast<int>(std::rand() % size));
-  }
-  return v;
-}
-
-void BM_Complexity_O_N(benchmark::State& state) {
-  auto v = ConstructRandomVector(state.range(0));
-  // Test worst case scenario (item not in vector)
-  const int64_t item_not_in_vector = state.range(0) * 2;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity(benchmark::oN);
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity([](int64_t n) -> double { return static_cast<double>(n); });
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity();
-
-const char *n_test_name = "BM_Complexity_O_N";
-const char *big_o_n_test_name = "BM_Complexity_O_N_BigO";
-const char *rms_o_n_test_name = "BM_Complexity_O_N_RMS";
-const char *enum_auto_big_o_n = "N";
-const char *lambda_big_o_n = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
-                     enum_auto_big_o_n);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
-                     lambda_big_o_n);
-
-// ========================================================================= //
-// ------------------------- Testing BigO O(N*lgN) ------------------------- //
-// ========================================================================= //
-
-static void BM_Complexity_O_N_log_N(benchmark::State& state) {
-  auto v = ConstructRandomVector(state.range(0));
-  for (auto _ : state) {
-    std::sort(v.begin(), v.end());
-  }
-  state.SetComplexityN(state.range(0));
-}
-static const double kLog2E = 1.44269504088896340736;
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity(benchmark::oNLogN);
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity([](int64_t n) { return kLog2E * n * log(static_cast<double>(n)); });
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity();
-
-const char *n_lg_n_test_name = "BM_Complexity_O_N_log_N";
-const char *big_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_BigO";
-const char *rms_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_RMS";
-const char *enum_auto_big_o_n_lg_n = "NlgN";
-const char *lambda_big_o_n_lg_n = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
-                     rms_o_n_lg_n_test_name, enum_auto_big_o_n_lg_n);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
-                     rms_o_n_lg_n_test_name, lambda_big_o_n_lg_n);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char *argv[]) { RunOutputTests(argc, argv); }
diff --git a/third_party/google-benchmark/test/cxx03_test.cc b/third_party/google-benchmark/test/cxx03_test.cc
deleted file mode 100644
index baa9ed9..0000000
--- a/third_party/google-benchmark/test/cxx03_test.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-#undef NDEBUG
-#include <cassert>
-#include <cstddef>
-
-#include "benchmark/benchmark.h"
-
-#if __cplusplus >= 201103L
-#error C++11 or greater detected. Should be C++03.
-#endif
-
-#ifdef BENCHMARK_HAS_CXX11
-#error C++11 or greater detected by the library. BENCHMARK_HAS_CXX11 is defined.
-#endif
-
-void BM_empty(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    volatile std::size_t x = state.iterations();
-    ((void)x);
-  }
-}
-BENCHMARK(BM_empty);
-
-// The new C++11 interface for args/ranges requires initializer list support.
-// Therefore we provide the old interface to support C++03.
-void BM_old_arg_range_interface(benchmark::State& state) {
-  assert((state.range(0) == 1 && state.range(1) == 2) ||
-         (state.range(0) == 5 && state.range(1) == 6));
-  while (state.KeepRunning()) {
-  }
-}
-BENCHMARK(BM_old_arg_range_interface)->ArgPair(1, 2)->RangePair(5, 5, 6, 6);
-
-template <class T, class U>
-void BM_template2(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE2(BM_template2, int, long);
-
-template <class T>
-void BM_template1(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE(BM_template1, long);
-BENCHMARK_TEMPLATE1(BM_template1, int);
-
-template <class T>
-struct BM_Fixture : public ::benchmark::Fixture {
-};
-
-BENCHMARK_TEMPLATE_F(BM_Fixture, BM_template1, long)(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE1_F(BM_Fixture, BM_template2, int)(benchmark::State& state) {
-  BM_empty(state);
-}
-
-void BM_counters(benchmark::State& state) {
-    BM_empty(state);
-    state.counters["Foo"] = 2;
-}
-BENCHMARK(BM_counters);
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/diagnostics_test.cc b/third_party/google-benchmark/test/diagnostics_test.cc
deleted file mode 100644
index dd64a33..0000000
--- a/third_party/google-benchmark/test/diagnostics_test.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Testing:
-//   State::PauseTiming()
-//   State::ResumeTiming()
-// Test that CHECK's within these function diagnose when they are called
-// outside of the KeepRunning() loop.
-//
-// NOTE: Users should NOT include or use src/check.h. This is only done in
-// order to test library internals.
-
-#include <cstdlib>
-#include <stdexcept>
-
-#include "../src/check.h"
-#include "benchmark/benchmark.h"
-
-#if defined(__GNUC__) && !defined(__EXCEPTIONS)
-#define TEST_HAS_NO_EXCEPTIONS
-#endif
-
-void TestHandler() {
-#ifndef TEST_HAS_NO_EXCEPTIONS
-  throw std::logic_error("");
-#else
-  std::abort();
-#endif
-}
-
-void try_invalid_pause_resume(benchmark::State& state) {
-#if !defined(TEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS) && !defined(TEST_HAS_NO_EXCEPTIONS)
-  try {
-    state.PauseTiming();
-    std::abort();
-  } catch (std::logic_error const&) {
-  }
-  try {
-    state.ResumeTiming();
-    std::abort();
-  } catch (std::logic_error const&) {
-  }
-#else
-  (void)state;  // avoid unused warning
-#endif
-}
-
-void BM_diagnostic_test(benchmark::State& state) {
-  static bool called_once = false;
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  called_once = true;
-}
-BENCHMARK(BM_diagnostic_test);
-
-
-void BM_diagnostic_test_keep_running(benchmark::State& state) {
-  static bool called_once = false;
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  while(state.KeepRunning()) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  called_once = true;
-}
-BENCHMARK(BM_diagnostic_test_keep_running);
-
-int main(int argc, char* argv[]) {
-  benchmark::internal::GetAbortHandler() = &TestHandler;
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-}
diff --git a/third_party/google-benchmark/test/display_aggregates_only_test.cc b/third_party/google-benchmark/test/display_aggregates_only_test.cc
deleted file mode 100644
index 3c36d3f..0000000
--- a/third_party/google-benchmark/test/display_aggregates_only_test.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-
-#undef NDEBUG
-#include <cstdio>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// Ok this test is super ugly. We want to check what happens with the file
-// reporter in the presence of DisplayAggregatesOnly().
-// We do not care about console output, the normal tests check that already.
-
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->DisplayAggregatesOnly();
-
-int main(int argc, char* argv[]) {
-  const std::string output = GetFileReporterOutput(argc, argv);
-
-  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 6 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3\"") != 3 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
-          1) {
-    std::cout << "Precondition mismatch. Expected to only find 6 "
-                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"\nThe entire "
-                 "output:\n";
-    std::cout << output;
-    return 1;
-  }
-
-  return 0;
-}
diff --git a/third_party/google-benchmark/test/donotoptimize_assembly_test.cc b/third_party/google-benchmark/test/donotoptimize_assembly_test.cc
deleted file mode 100644
index d4b0bab..0000000
--- a/third_party/google-benchmark/test/donotoptimize_assembly_test.cc
+++ /dev/null
@@ -1,163 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-extern "C" {
-
-extern int ExternInt;
-extern int ExternInt2;
-extern int ExternInt3;
-
-inline int Add42(int x) { return x + 42; }
-
-struct NotTriviallyCopyable {
-  NotTriviallyCopyable();
-  explicit NotTriviallyCopyable(int x) : value(x) {}
-  NotTriviallyCopyable(NotTriviallyCopyable const&);
-  int value;
-};
-
-struct Large {
-  int value;
-  int data[2];
-};
-
-}
-// CHECK-LABEL: test_with_rvalue:
-extern "C" void test_with_rvalue() {
-  benchmark::DoNotOptimize(Add42(0));
-  // CHECK: movl $42, %eax
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_rvalue:
-extern "C" void test_with_large_rvalue() {
-  benchmark::DoNotOptimize(Large{ExternInt, {ExternInt, ExternInt}});
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_rvalue:
-extern "C" void test_with_non_trivial_rvalue() {
-  benchmark::DoNotOptimize(NotTriviallyCopyable(ExternInt));
-  // CHECK: mov{{l|q}} ExternInt(%rip)
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_lvalue:
-extern "C" void test_with_lvalue() {
-  int x = 101;
-  benchmark::DoNotOptimize(x);
-  // CHECK-GNU: movl $101, %eax
-  // CHECK-CLANG: movl $101, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_lvalue:
-extern "C" void test_with_large_lvalue() {
-  Large L{ExternInt, {ExternInt, ExternInt}};
-  benchmark::DoNotOptimize(L);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_lvalue:
-extern "C" void test_with_non_trivial_lvalue() {
-  NotTriviallyCopyable NTC(ExternInt);
-  benchmark::DoNotOptimize(NTC);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_const_lvalue:
-extern "C" void test_with_const_lvalue() {
-  const int x = 123;
-  benchmark::DoNotOptimize(x);
-  // CHECK: movl $123, %eax
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_const_lvalue:
-extern "C" void test_with_large_const_lvalue() {
-  const Large L{ExternInt, {ExternInt, ExternInt}};
-  benchmark::DoNotOptimize(L);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_const_lvalue:
-extern "C" void test_with_non_trivial_const_lvalue() {
-  const NotTriviallyCopyable Obj(ExternInt);
-  benchmark::DoNotOptimize(Obj);
-  // CHECK: mov{{q|l}} ExternInt(%rip)
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_div_by_two:
-extern "C" int test_div_by_two(int input) {
-  int divisor = 2;
-  benchmark::DoNotOptimize(divisor);
-  return input / divisor;
-  // CHECK: movl $2, [[DEST:.*]]
-  // CHECK: idivl [[DEST]]
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_inc_integer:
-extern "C" int test_inc_integer() {
-  int x = 0;
-  for (int i=0; i < 5; ++i)
-    benchmark::DoNotOptimize(++x);
-  // CHECK: movl $1, [[DEST:.*]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK-CLANG: movl [[DEST]], %eax
-  // CHECK: ret
-  return x;
-}
-
-// CHECK-LABEL: test_pointer_rvalue
-extern "C" void test_pointer_rvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-  int x = 42;
-  benchmark::DoNotOptimize(&x);
-}
-
-// CHECK-LABEL: test_pointer_const_lvalue:
-extern "C" void test_pointer_const_lvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-  int x = 42;
-  int * const xp = &x;
-  benchmark::DoNotOptimize(xp);
-}
-
-// CHECK-LABEL: test_pointer_lvalue:
-extern "C" void test_pointer_lvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z+]+]])
-  // CHECK: ret
-  int x = 42;
-  int *xp = &x;
-  benchmark::DoNotOptimize(xp);
-}
diff --git a/third_party/google-benchmark/test/donotoptimize_test.cc b/third_party/google-benchmark/test/donotoptimize_test.cc
deleted file mode 100644
index 2ce92d1..0000000
--- a/third_party/google-benchmark/test/donotoptimize_test.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cstdint>
-
-namespace {
-#if defined(__GNUC__)
-std::uint64_t double_up(const std::uint64_t x) __attribute__((const));
-#endif
-std::uint64_t double_up(const std::uint64_t x) { return x * 2; }
-}
-
-// Using DoNotOptimize on types like BitRef seem to cause a lot of problems
-// with the inline assembly on both GCC and Clang.
-struct BitRef {
-  int index;
-  unsigned char &byte;
-
-public:
-  static BitRef Make() {
-    static unsigned char arr[2] = {};
-    BitRef b(1, arr[0]);
-    return b;
-  }
-private:
-  BitRef(int i, unsigned char& b) : index(i), byte(b) {}
-};
-
-int main(int, char*[]) {
-  // this test verifies compilation of DoNotOptimize() for some types
-
-  char buffer8[8] = "";
-  benchmark::DoNotOptimize(buffer8);
-
-  char buffer20[20] = "";
-  benchmark::DoNotOptimize(buffer20);
-
-  char buffer1024[1024] = "";
-  benchmark::DoNotOptimize(buffer1024);
-  benchmark::DoNotOptimize(&buffer1024[0]);
-
-  int x = 123;
-  benchmark::DoNotOptimize(x);
-  benchmark::DoNotOptimize(&x);
-  benchmark::DoNotOptimize(x += 42);
-
-  benchmark::DoNotOptimize(double_up(x));
-
-  // These tests are to e
-  benchmark::DoNotOptimize(BitRef::Make());
-  BitRef lval = BitRef::Make();
-  benchmark::DoNotOptimize(lval);
-}
diff --git a/third_party/google-benchmark/test/filter_test.cc b/third_party/google-benchmark/test/filter_test.cc
deleted file mode 100644
index 0e27065..0000000
--- a/third_party/google-benchmark/test/filter_test.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <cmath>
-#include <cstdint>
-#include <cstdlib>
-
-#include <iostream>
-#include <limits>
-#include <sstream>
-#include <string>
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) {
-    ++count_;
-    ConsoleReporter::ReportRuns(report);
-  };
-
-  TestReporter() : count_(0) {}
-
-  virtual ~TestReporter() {}
-
-  size_t GetCount() const { return count_; }
-
- private:
-  mutable size_t count_;
-};
-
-}  // end namespace
-
-static void NoPrefix(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(NoPrefix);
-
-static void BM_Foo(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Foo);
-
-static void BM_Bar(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Bar);
-
-static void BM_FooBar(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_FooBar);
-
-static void BM_FooBa(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_FooBa);
-
-int main(int argc, char **argv) {
-  bool list_only = false;
-  for (int i = 0; i < argc; ++i)
-    list_only |= std::string(argv[i]).find("--benchmark_list_tests") !=
-                 std::string::npos;
-
-  benchmark::Initialize(&argc, argv);
-
-  TestReporter test_reporter;
-  const size_t returned_count =
-      benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  if (argc == 2) {
-    // Make sure we ran all of the tests
-    std::stringstream ss(argv[1]);
-    size_t expected_return;
-    ss >> expected_return;
-
-    if (returned_count != expected_return) {
-      std::cerr << "ERROR: Expected " << expected_return
-                << " tests to match the filter but returned_count = "
-                << returned_count << std::endl;
-      return -1;
-    }
-
-    const size_t expected_reports = list_only ? 0 : expected_return;
-    const size_t reports_count = test_reporter.GetCount();
-    if (reports_count != expected_reports) {
-      std::cerr << "ERROR: Expected " << expected_reports
-                << " tests to be run but reported_count = " << reports_count
-                << std::endl;
-      return -1;
-    }
-  }
-
-  return 0;
-}
diff --git a/third_party/google-benchmark/test/fixture_test.cc b/third_party/google-benchmark/test/fixture_test.cc
deleted file mode 100644
index 1462b10..0000000
--- a/third_party/google-benchmark/test/fixture_test.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <memory>
-
-class MyFixture : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State& state) {
-    if (state.thread_index == 0) {
-      assert(data.get() == nullptr);
-      data.reset(new int(42));
-    }
-  }
-
-  void TearDown(const ::benchmark::State& state) {
-    if (state.thread_index == 0) {
-      assert(data.get() != nullptr);
-      data.reset();
-    }
-  }
-
-  ~MyFixture() { assert(data == nullptr); }
-
-  std::unique_ptr<int> data;
-};
-
-BENCHMARK_F(MyFixture, Foo)(benchmark::State &st) {
-  assert(data.get() != nullptr);
-  assert(*data == 42);
-  for (auto _ : st) {
-  }
-}
-
-BENCHMARK_DEFINE_F(MyFixture, Bar)(benchmark::State& st) {
-  if (st.thread_index == 0) {
-    assert(data.get() != nullptr);
-    assert(*data == 42);
-  }
-  for (auto _ : st) {
-    assert(data.get() != nullptr);
-    assert(*data == 42);
-  }
-  st.SetItemsProcessed(st.range(0));
-}
-BENCHMARK_REGISTER_F(MyFixture, Bar)->Arg(42);
-BENCHMARK_REGISTER_F(MyFixture, Bar)->Arg(42)->ThreadPerCpu();
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/link_main_test.cc b/third_party/google-benchmark/test/link_main_test.cc
deleted file mode 100644
index 241ad5c..0000000
--- a/third_party/google-benchmark/test/link_main_test.cc
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "benchmark/benchmark.h"
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
diff --git a/third_party/google-benchmark/test/map_test.cc b/third_party/google-benchmark/test/map_test.cc
deleted file mode 100644
index dbf7982..0000000
--- a/third_party/google-benchmark/test/map_test.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cstdlib>
-#include <map>
-
-namespace {
-
-std::map<int, int> ConstructRandomMap(int size) {
-  std::map<int, int> m;
-  for (int i = 0; i < size; ++i) {
-    m.insert(std::make_pair(std::rand() % size, std::rand() % size));
-  }
-  return m;
-}
-
-}  // namespace
-
-// Basic version.
-static void BM_MapLookup(benchmark::State& state) {
-  const int size = static_cast<int>(state.range(0));
-  std::map<int, int> m;
-  for (auto _ : state) {
-    state.PauseTiming();
-    m = ConstructRandomMap(size);
-    state.ResumeTiming();
-    for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(std::rand() % size));
-    }
-  }
-  state.SetItemsProcessed(state.iterations() * size);
-}
-BENCHMARK(BM_MapLookup)->Range(1 << 3, 1 << 12);
-
-// Using fixtures.
-class MapFixture : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State& st) {
-    m = ConstructRandomMap(static_cast<int>(st.range(0)));
-  }
-
-  void TearDown(const ::benchmark::State&) { m.clear(); }
-
-  std::map<int, int> m;
-};
-
-BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
-  const int size = static_cast<int>(state.range(0));
-  for (auto _ : state) {
-    for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(std::rand() % size));
-    }
-  }
-  state.SetItemsProcessed(state.iterations() * size);
-}
-BENCHMARK_REGISTER_F(MapFixture, Lookup)->Range(1 << 3, 1 << 12);
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/memory_manager_test.cc b/third_party/google-benchmark/test/memory_manager_test.cc
deleted file mode 100644
index 94be608..0000000
--- a/third_party/google-benchmark/test/memory_manager_test.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-#include <memory>
-
-#include "../src/check.h"
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-class TestMemoryManager : public benchmark::MemoryManager {
-  void Start() {}
-  void Stop(Result* result) {
-    result->num_allocs = 42;
-    result->max_bytes_used = 42000;
-  }
-};
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_empty %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_empty\",$"},
-                       {"\"run_name\": \"BM_empty\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"allocs_per_iter\": %float,$", MR_Next},
-                       {"\"max_bytes_used\": 42000$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_empty\",%csv_report$"}});
-
-
-int main(int argc, char *argv[]) {
-  std::unique_ptr<benchmark::MemoryManager> mm(new TestMemoryManager());
-
-  benchmark::RegisterMemoryManager(mm.get());
-  RunOutputTests(argc, argv);
-  benchmark::RegisterMemoryManager(nullptr);
-}
diff --git a/third_party/google-benchmark/test/multiple_ranges_test.cc b/third_party/google-benchmark/test/multiple_ranges_test.cc
deleted file mode 100644
index c64acab..0000000
--- a/third_party/google-benchmark/test/multiple_ranges_test.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <iostream>
-#include <set>
-#include <vector>
-
-class MultipleRangesFixture : public ::benchmark::Fixture {
- public:
-  MultipleRangesFixture()
-      : expectedValues({{1, 3, 5},
-                        {1, 3, 8},
-                        {1, 3, 15},
-                        {2, 3, 5},
-                        {2, 3, 8},
-                        {2, 3, 15},
-                        {1, 4, 5},
-                        {1, 4, 8},
-                        {1, 4, 15},
-                        {2, 4, 5},
-                        {2, 4, 8},
-                        {2, 4, 15},
-                        {1, 7, 5},
-                        {1, 7, 8},
-                        {1, 7, 15},
-                        {2, 7, 5},
-                        {2, 7, 8},
-                        {2, 7, 15},
-                        {7, 6, 3}}) {}
-
-  void SetUp(const ::benchmark::State& state) {
-    std::vector<int64_t> ranges = {state.range(0), state.range(1),
-                                   state.range(2)};
-
-    assert(expectedValues.find(ranges) != expectedValues.end());
-
-    actualValues.insert(ranges);
-  }
-
-  // NOTE: This is not TearDown as we want to check after _all_ runs are
-  // complete.
-  virtual ~MultipleRangesFixture() {
-    assert(actualValues.size() == expectedValues.size());
-    if (actualValues.size() != expectedValues.size()) {
-      std::cout << "EXPECTED\n";
-      for (auto v : expectedValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-      std::cout << "ACTUAL\n";
-      for (auto v : actualValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-    }
-  }
-
-  std::set<std::vector<int64_t>> expectedValues;
-  std::set<std::vector<int64_t>> actualValues;
-};
-
-BENCHMARK_DEFINE_F(MultipleRangesFixture, Empty)(benchmark::State& state) {
-  for (auto _ : state) {
-    int64_t product = state.range(0) * state.range(1) * state.range(2);
-    for (int64_t x = 0; x < product; x++) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK_REGISTER_F(MultipleRangesFixture, Empty)
-    ->RangeMultiplier(2)
-    ->Ranges({{1, 2}, {3, 7}, {5, 15}})
-    ->Args({7, 6, 3});
-
-void BM_CheckDefaultArgument(benchmark::State& state) {
-  // Test that the 'range()' without an argument is the same as 'range(0)'.
-  assert(state.range() == state.range(0));
-  assert(state.range() != state.range(1));
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_CheckDefaultArgument)->Ranges({{1, 5}, {6, 10}});
-
-static void BM_MultipleRanges(benchmark::State& st) {
-  for (auto _ : st) {
-  }
-}
-BENCHMARK(BM_MultipleRanges)->Ranges({{5, 5}, {6, 6}});
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/options_test.cc b/third_party/google-benchmark/test/options_test.cc
deleted file mode 100644
index fdec691..0000000
--- a/third_party/google-benchmark/test/options_test.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-#include "benchmark/benchmark.h"
-#include <chrono>
-#include <thread>
-
-#if defined(NDEBUG)
-#undef NDEBUG
-#endif
-#include <cassert>
-
-void BM_basic(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-
-void BM_basic_slow(benchmark::State& state) {
-  std::chrono::milliseconds sleep_duration(state.range(0));
-  for (auto _ : state) {
-    std::this_thread::sleep_for(
-        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
-  }
-}
-
-BENCHMARK(BM_basic);
-BENCHMARK(BM_basic)->Arg(42);
-BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
-BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
-BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
-BENCHMARK(BM_basic)->Range(1, 8);
-BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
-BENCHMARK(BM_basic)->DenseRange(10, 15);
-BENCHMARK(BM_basic)->Args({42, 42});
-BENCHMARK(BM_basic)->Ranges({{64, 512}, {64, 512}});
-BENCHMARK(BM_basic)->MinTime(0.7);
-BENCHMARK(BM_basic)->UseRealTime();
-BENCHMARK(BM_basic)->ThreadRange(2, 4);
-BENCHMARK(BM_basic)->ThreadPerCpu();
-BENCHMARK(BM_basic)->Repetitions(3);
-
-void CustomArgs(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i < 10; ++i) {
-    b->Arg(i);
-  }
-}
-
-BENCHMARK(BM_basic)->Apply(CustomArgs);
-
-void BM_explicit_iteration_count(benchmark::State& state) {
-  // Test that benchmarks specified with an explicit iteration count are
-  // only run once.
-  static bool invoked_before = false;
-  assert(!invoked_before);
-  invoked_before = true;
-
-  // Test that the requested iteration count is respected.
-  assert(state.max_iterations == 42);
-  size_t actual_iterations = 0;
-  for (auto _ : state)
-    ++actual_iterations;
-  assert(state.iterations() == state.max_iterations);
-  assert(state.iterations() == 42);
-
-}
-BENCHMARK(BM_explicit_iteration_count)->Iterations(42);
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/output_test.h b/third_party/google-benchmark/test/output_test.h
deleted file mode 100644
index 9385761..0000000
--- a/third_party/google-benchmark/test/output_test.h
+++ /dev/null
@@ -1,213 +0,0 @@
-#ifndef TEST_OUTPUT_TEST_H
-#define TEST_OUTPUT_TEST_H
-
-#undef NDEBUG
-#include <functional>
-#include <initializer_list>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "../src/re.h"
-#include "benchmark/benchmark.h"
-
-#define CONCAT2(x, y) x##y
-#define CONCAT(x, y) CONCAT2(x, y)
-
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = ::AddCases(__VA_ARGS__)
-
-#define SET_SUBSTITUTIONS(...) \
-  int CONCAT(dummy, __LINE__) = ::SetSubstitutions(__VA_ARGS__)
-
-enum MatchRules {
-  MR_Default,  // Skip non-matching lines until a match is found.
-  MR_Next,     // Match must occur on the next line.
-  MR_Not  // No line between the current position and the next match matches
-          // the regex
-};
-
-struct TestCase {
-  TestCase(std::string re, int rule = MR_Default);
-
-  std::string regex_str;
-  int match_rule;
-  std::string substituted_regex;
-  std::shared_ptr<benchmark::Regex> regex;
-};
-
-enum TestCaseID {
-  TC_ConsoleOut,
-  TC_ConsoleErr,
-  TC_JSONOut,
-  TC_JSONErr,
-  TC_CSVOut,
-  TC_CSVErr,
-
-  TC_NumID  // PRIVATE
-};
-
-// Add a list of test cases to be run against the output specified by
-// 'ID'
-int AddCases(TestCaseID ID, std::initializer_list<TestCase> il);
-
-// Add or set a list of substitutions to be performed on constructed regex's
-// See 'output_test_helper.cc' for a list of default substitutions.
-int SetSubstitutions(
-    std::initializer_list<std::pair<std::string, std::string>> il);
-
-// Run all output tests.
-void RunOutputTests(int argc, char* argv[]);
-
-// Count the number of 'pat' substrings in the 'haystack' string.
-int SubstrCnt(const std::string& haystack, const std::string& pat);
-
-// Run registered benchmarks with file reporter enabled, and return the content
-// outputted by the file reporter.
-std::string GetFileReporterOutput(int argc, char* argv[]);
-
-// ========================================================================= //
-// ------------------------- Results checking ------------------------------ //
-// ========================================================================= //
-
-// Call this macro to register a benchmark for checking its results. This
-// should be all that's needed. It subscribes a function to check the (CSV)
-// results of a benchmark. This is done only after verifying that the output
-// strings are really as expected.
-// bm_name_pattern: a name or a regex pattern which will be matched against
-//                  all the benchmark names. Matching benchmarks
-//                  will be the subject of a call to checker_function
-// checker_function: should be of type ResultsCheckFn (see below)
-#define CHECK_BENCHMARK_RESULTS(bm_name_pattern, checker_function) \
-  size_t CONCAT(dummy, __LINE__) = AddChecker(bm_name_pattern, checker_function)
-
-struct Results;
-typedef std::function<void(Results const&)> ResultsCheckFn;
-
-size_t AddChecker(const char* bm_name_pattern, ResultsCheckFn fn);
-
-// Class holding the results of a benchmark.
-// It is passed in calls to checker functions.
-struct Results {
-  // the benchmark name
-  std::string name;
-  // the benchmark fields
-  std::map<std::string, std::string> values;
-
-  Results(const std::string& n) : name(n) {}
-
-  int NumThreads() const;
-
-  double NumIterations() const;
-
-  typedef enum { kCpuTime, kRealTime } BenchmarkTime;
-
-  // get cpu_time or real_time in seconds
-  double GetTime(BenchmarkTime which) const;
-
-  // get the real_time duration of the benchmark in seconds.
-  // it is better to use fuzzy float checks for this, as the float
-  // ASCII formatting is lossy.
-  double DurationRealTime() const {
-    return NumIterations() * GetTime(kRealTime);
-  }
-  // get the cpu_time duration of the benchmark in seconds
-  double DurationCPUTime() const {
-    return NumIterations() * GetTime(kCpuTime);
-  }
-
-  // get the string for a result by name, or nullptr if the name
-  // is not found
-  const std::string* Get(const char* entry_name) const {
-    auto it = values.find(entry_name);
-    if (it == values.end()) return nullptr;
-    return &it->second;
-  }
-
-  // get a result by name, parsed as a specific type.
-  // NOTE: for counters, use GetCounterAs instead.
-  template <class T>
-  T GetAs(const char* entry_name) const;
-
-  // counters are written as doubles, so they have to be read first
-  // as a double, and only then converted to the asked type.
-  template <class T>
-  T GetCounterAs(const char* entry_name) const {
-    double dval = GetAs<double>(entry_name);
-    T tval = static_cast<T>(dval);
-    return tval;
-  }
-};
-
-template <class T>
-T Results::GetAs(const char* entry_name) const {
-  auto* sv = Get(entry_name);
-  CHECK(sv != nullptr && !sv->empty());
-  std::stringstream ss;
-  ss << *sv;
-  T out;
-  ss >> out;
-  CHECK(!ss.fail());
-  return out;
-}
-
-//----------------------------------
-// Macros to help in result checking. Do not use them with arguments causing
-// side-effects.
-
-// clang-format off
-
-#define _CHECK_RESULT_VALUE(entry, getfn, var_type, var_name, relationship, value) \
-    CONCAT(CHECK_, relationship)                                        \
-    (entry.getfn< var_type >(var_name), (value)) << "\n"                \
-    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "expected (" << #var_type << ")" << (var_name)                   \
-    << "=" << (entry).getfn< var_type >(var_name)                       \
-    << " to be " #relationship " to " << (value) << "\n"
-
-// check with tolerance. eps_factor is the tolerance window, which is
-// interpreted relative to value (eg, 0.1 means 10% of value).
-#define _CHECK_FLOAT_RESULT_VALUE(entry, getfn, var_type, var_name, relationship, value, eps_factor) \
-    CONCAT(CHECK_FLOAT_, relationship)                                  \
-    (entry.getfn< var_type >(var_name), (value), (eps_factor) * (value)) << "\n" \
-    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "expected (" << #var_type << ")" << (var_name)                   \
-    << "=" << (entry).getfn< var_type >(var_name)                       \
-    << " to be " #relationship " to " << (value) << "\n"                \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "with tolerance of " << (eps_factor) * (value)                   \
-    << " (" << (eps_factor)*100. << "%), "                              \
-    << "but delta was " << ((entry).getfn< var_type >(var_name) - (value)) \
-    << " (" << (((entry).getfn< var_type >(var_name) - (value))         \
-               /                                                        \
-               ((value) > 1.e-5 || value < -1.e-5 ? value : 1.e-5)*100.) \
-    << "%)"
-
-#define CHECK_RESULT_VALUE(entry, var_type, var_name, relationship, value) \
-    _CHECK_RESULT_VALUE(entry, GetAs, var_type, var_name, relationship, value)
-
-#define CHECK_COUNTER_VALUE(entry, var_type, var_name, relationship, value) \
-    _CHECK_RESULT_VALUE(entry, GetCounterAs, var_type, var_name, relationship, value)
-
-#define CHECK_FLOAT_RESULT_VALUE(entry, var_name, relationship, value, eps_factor) \
-    _CHECK_FLOAT_RESULT_VALUE(entry, GetAs, double, var_name, relationship, value, eps_factor)
-
-#define CHECK_FLOAT_COUNTER_VALUE(entry, var_name, relationship, value, eps_factor) \
-    _CHECK_FLOAT_RESULT_VALUE(entry, GetCounterAs, double, var_name, relationship, value, eps_factor)
-
-// clang-format on
-
-// ========================================================================= //
-// --------------------------- Misc Utilities ------------------------------ //
-// ========================================================================= //
-
-namespace {
-
-const char* const dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
-
-}  //  end namespace
-
-#endif  // TEST_OUTPUT_TEST_H
diff --git a/third_party/google-benchmark/test/output_test_helper.cc b/third_party/google-benchmark/test/output_test_helper.cc
deleted file mode 100644
index 5dc951d..0000000
--- a/third_party/google-benchmark/test/output_test_helper.cc
+++ /dev/null
@@ -1,505 +0,0 @@
-#include <cstdio>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <memory>
-#include <random>
-#include <sstream>
-#include <streambuf>
-
-#include "../src/benchmark_api_internal.h"
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "../src/re.h"     // NOTE: re.h is for internal use only
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------------ Internals -------------------------------- //
-// ========================================================================= //
-namespace internal {
-namespace {
-
-using TestCaseList = std::vector<TestCase>;
-
-// Use a vector because the order elements are added matters during iteration.
-// std::map/unordered_map don't guarantee that.
-// For example:
-//  SetSubstitutions({{"%HelloWorld", "Hello"}, {"%Hello", "Hi"}});
-//     Substitute("%HelloWorld") // Always expands to Hello.
-using SubMap = std::vector<std::pair<std::string, std::string>>;
-
-TestCaseList& GetTestCaseList(TestCaseID ID) {
-  // Uses function-local statics to ensure initialization occurs
-  // before first use.
-  static TestCaseList lists[TC_NumID];
-  return lists[ID];
-}
-
-SubMap& GetSubstitutions() {
-  // Don't use 'dec_re' from header because it may not yet be initialized.
-  // clang-format off
-  static std::string safe_dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
-  static std::string time_re = "([0-9]+[.])?[0-9]+";
-  static SubMap map = {
-      {"%float", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?"},
-      // human-readable float
-      {"%hrfloat", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?[kMGTPEZYmunpfazy]?"},
-      {"%int", "[ ]*[0-9]+"},
-      {" %s ", "[ ]+"},
-      {"%time", "[ ]*" + time_re + "[ ]+ns"},
-      {"%console_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns [ ]*[0-9]+"},
-      {"%console_time_only_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns"},
-      {"%console_us_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us [ ]*[0-9]+"},
-      {"%console_us_time_only_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us"},
-      {"%csv_header",
-       "name,iterations,real_time,cpu_time,time_unit,bytes_per_second,"
-       "items_per_second,label,error_occurred,error_message"},
-      {"%csv_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,,,"},
-      {"%csv_us_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",us,,,,,"},
-      {"%csv_bytes_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re + ",,,,"},
-      {"%csv_items_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,," + safe_dec_re + ",,,"},
-      {"%csv_bytes_items_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re +
-       "," + safe_dec_re + ",,,"},
-      {"%csv_label_report_begin", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,"},
-      {"%csv_label_report_end", ",,"}};
-  // clang-format on
-  return map;
-}
-
-std::string PerformSubstitutions(std::string source) {
-  SubMap const& subs = GetSubstitutions();
-  using SizeT = std::string::size_type;
-  for (auto const& KV : subs) {
-    SizeT pos;
-    SizeT next_start = 0;
-    while ((pos = source.find(KV.first, next_start)) != std::string::npos) {
-      next_start = pos + KV.second.size();
-      source.replace(pos, KV.first.size(), KV.second);
-    }
-  }
-  return source;
-}
-
-void CheckCase(std::stringstream& remaining_output, TestCase const& TC,
-               TestCaseList const& not_checks) {
-  std::string first_line;
-  bool on_first = true;
-  std::string line;
-  while (remaining_output.eof() == false) {
-    CHECK(remaining_output.good());
-    std::getline(remaining_output, line);
-    if (on_first) {
-      first_line = line;
-      on_first = false;
-    }
-    for (const auto& NC : not_checks) {
-      CHECK(!NC.regex->Match(line))
-          << "Unexpected match for line \"" << line << "\" for MR_Not regex \""
-          << NC.regex_str << "\""
-          << "\n    actual regex string \"" << TC.substituted_regex << "\""
-          << "\n    started matching near: " << first_line;
-    }
-    if (TC.regex->Match(line)) return;
-    CHECK(TC.match_rule != MR_Next)
-        << "Expected line \"" << line << "\" to match regex \"" << TC.regex_str
-        << "\""
-        << "\n    actual regex string \"" << TC.substituted_regex << "\""
-        << "\n    started matching near: " << first_line;
-  }
-  CHECK(remaining_output.eof() == false)
-      << "End of output reached before match for regex \"" << TC.regex_str
-      << "\" was found"
-      << "\n    actual regex string \"" << TC.substituted_regex << "\""
-      << "\n    started matching near: " << first_line;
-}
-
-void CheckCases(TestCaseList const& checks, std::stringstream& output) {
-  std::vector<TestCase> not_checks;
-  for (size_t i = 0; i < checks.size(); ++i) {
-    const auto& TC = checks[i];
-    if (TC.match_rule == MR_Not) {
-      not_checks.push_back(TC);
-      continue;
-    }
-    CheckCase(output, TC, not_checks);
-    not_checks.clear();
-  }
-}
-
-class TestReporter : public benchmark::BenchmarkReporter {
- public:
-  TestReporter(std::vector<benchmark::BenchmarkReporter*> reps)
-      : reporters_(reps) {}
-
-  virtual bool ReportContext(const Context& context) {
-    bool last_ret = false;
-    bool first = true;
-    for (auto rep : reporters_) {
-      bool new_ret = rep->ReportContext(context);
-      CHECK(first || new_ret == last_ret)
-          << "Reports return different values for ReportContext";
-      first = false;
-      last_ret = new_ret;
-    }
-    (void)first;
-    return last_ret;
-  }
-
-  void ReportRuns(const std::vector<Run>& report) {
-    for (auto rep : reporters_) rep->ReportRuns(report);
-  }
-  void Finalize() {
-    for (auto rep : reporters_) rep->Finalize();
-  }
-
- private:
-  std::vector<benchmark::BenchmarkReporter*> reporters_;
-};
-}  // namespace
-
-}  // end namespace internal
-
-// ========================================================================= //
-// -------------------------- Results checking ----------------------------- //
-// ========================================================================= //
-
-namespace internal {
-
-// Utility class to manage subscribers for checking benchmark results.
-// It works by parsing the CSV output to read the results.
-class ResultsChecker {
- public:
-  struct PatternAndFn : public TestCase {  // reusing TestCase for its regexes
-    PatternAndFn(const std::string& rx, ResultsCheckFn fn_)
-        : TestCase(rx), fn(fn_) {}
-    ResultsCheckFn fn;
-  };
-
-  std::vector<PatternAndFn> check_patterns;
-  std::vector<Results> results;
-  std::vector<std::string> field_names;
-
-  void Add(const std::string& entry_pattern, ResultsCheckFn fn);
-
-  void CheckResults(std::stringstream& output);
-
- private:
-  void SetHeader_(const std::string& csv_header);
-  void SetValues_(const std::string& entry_csv_line);
-
-  std::vector<std::string> SplitCsv_(const std::string& line);
-};
-
-// store the static ResultsChecker in a function to prevent initialization
-// order problems
-ResultsChecker& GetResultsChecker() {
-  static ResultsChecker rc;
-  return rc;
-}
-
-// add a results checker for a benchmark
-void ResultsChecker::Add(const std::string& entry_pattern, ResultsCheckFn fn) {
-  check_patterns.emplace_back(entry_pattern, fn);
-}
-
-// check the results of all subscribed benchmarks
-void ResultsChecker::CheckResults(std::stringstream& output) {
-  // first reset the stream to the start
-  {
-    auto start = std::stringstream::pos_type(0);
-    // clear before calling tellg()
-    output.clear();
-    // seek to zero only when needed
-    if (output.tellg() > start) output.seekg(start);
-    // and just in case
-    output.clear();
-  }
-  // now go over every line and publish it to the ResultsChecker
-  std::string line;
-  bool on_first = true;
-  while (output.eof() == false) {
-    CHECK(output.good());
-    std::getline(output, line);
-    if (on_first) {
-      SetHeader_(line);  // this is important
-      on_first = false;
-      continue;
-    }
-    SetValues_(line);
-  }
-  // finally we can call the subscribed check functions
-  for (const auto& p : check_patterns) {
-    VLOG(2) << "--------------------------------\n";
-    VLOG(2) << "checking for benchmarks matching " << p.regex_str << "...\n";
-    for (const auto& r : results) {
-      if (!p.regex->Match(r.name)) {
-        VLOG(2) << p.regex_str << " is not matched by " << r.name << "\n";
-        continue;
-      } else {
-        VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
-      }
-      VLOG(1) << "Checking results of " << r.name << ": ... \n";
-      p.fn(r);
-      VLOG(1) << "Checking results of " << r.name << ": OK.\n";
-    }
-  }
-}
-
-// prepare for the names in this header
-void ResultsChecker::SetHeader_(const std::string& csv_header) {
-  field_names = SplitCsv_(csv_header);
-}
-
-// set the values for a benchmark
-void ResultsChecker::SetValues_(const std::string& entry_csv_line) {
-  if (entry_csv_line.empty()) return;  // some lines are empty
-  CHECK(!field_names.empty());
-  auto vals = SplitCsv_(entry_csv_line);
-  CHECK_EQ(vals.size(), field_names.size());
-  results.emplace_back(vals[0]);  // vals[0] is the benchmark name
-  auto& entry = results.back();
-  for (size_t i = 1, e = vals.size(); i < e; ++i) {
-    entry.values[field_names[i]] = vals[i];
-  }
-}
-
-// a quick'n'dirty csv splitter (eliminating quotes)
-std::vector<std::string> ResultsChecker::SplitCsv_(const std::string& line) {
-  std::vector<std::string> out;
-  if (line.empty()) return out;
-  if (!field_names.empty()) out.reserve(field_names.size());
-  size_t prev = 0, pos = line.find_first_of(','), curr = pos;
-  while (pos != line.npos) {
-    CHECK(curr > 0);
-    if (line[prev] == '"') ++prev;
-    if (line[curr - 1] == '"') --curr;
-    out.push_back(line.substr(prev, curr - prev));
-    prev = pos + 1;
-    pos = line.find_first_of(',', pos + 1);
-    curr = pos;
-  }
-  curr = line.size();
-  if (line[prev] == '"') ++prev;
-  if (line[curr - 1] == '"') --curr;
-  out.push_back(line.substr(prev, curr - prev));
-  return out;
-}
-
-}  // end namespace internal
-
-size_t AddChecker(const char* bm_name, ResultsCheckFn fn) {
-  auto& rc = internal::GetResultsChecker();
-  rc.Add(bm_name, fn);
-  return rc.results.size();
-}
-
-int Results::NumThreads() const {
-  auto pos = name.find("/threads:");
-  if (pos == name.npos) return 1;
-  auto end = name.find('/', pos + 9);
-  std::stringstream ss;
-  ss << name.substr(pos + 9, end);
-  int num = 1;
-  ss >> num;
-  CHECK(!ss.fail());
-  return num;
-}
-
-double Results::NumIterations() const {
-  return GetAs<double>("iterations");
-}
-
-double Results::GetTime(BenchmarkTime which) const {
-  CHECK(which == kCpuTime || which == kRealTime);
-  const char* which_str = which == kCpuTime ? "cpu_time" : "real_time";
-  double val = GetAs<double>(which_str);
-  auto unit = Get("time_unit");
-  CHECK(unit);
-  if (*unit == "ns") {
-    return val * 1.e-9;
-  } else if (*unit == "us") {
-    return val * 1.e-6;
-  } else if (*unit == "ms") {
-    return val * 1.e-3;
-  } else if (*unit == "s") {
-    return val;
-  } else {
-    CHECK(1 == 0) << "unknown time unit: " << *unit;
-    return 0;
-  }
-}
-
-// ========================================================================= //
-// -------------------------- Public API Definitions------------------------ //
-// ========================================================================= //
-
-TestCase::TestCase(std::string re, int rule)
-    : regex_str(std::move(re)),
-      match_rule(rule),
-      substituted_regex(internal::PerformSubstitutions(regex_str)),
-      regex(std::make_shared<benchmark::Regex>()) {
-  std::string err_str;
-  regex->Init(substituted_regex, &err_str);
-  CHECK(err_str.empty()) << "Could not construct regex \"" << substituted_regex
-                         << "\""
-                         << "\n    originally \"" << regex_str << "\""
-                         << "\n    got error: " << err_str;
-}
-
-int AddCases(TestCaseID ID, std::initializer_list<TestCase> il) {
-  auto& L = internal::GetTestCaseList(ID);
-  L.insert(L.end(), il);
-  return 0;
-}
-
-int SetSubstitutions(
-    std::initializer_list<std::pair<std::string, std::string>> il) {
-  auto& subs = internal::GetSubstitutions();
-  for (auto KV : il) {
-    bool exists = false;
-    KV.second = internal::PerformSubstitutions(KV.second);
-    for (auto& EKV : subs) {
-      if (EKV.first == KV.first) {
-        EKV.second = std::move(KV.second);
-        exists = true;
-        break;
-      }
-    }
-    if (!exists) subs.push_back(std::move(KV));
-  }
-  return 0;
-}
-
-void RunOutputTests(int argc, char* argv[]) {
-  using internal::GetTestCaseList;
-  benchmark::Initialize(&argc, argv);
-  auto options = benchmark::internal::GetOutputOptions(/*force_no_color*/ true);
-  benchmark::ConsoleReporter CR(options);
-  benchmark::JSONReporter JR;
-  benchmark::CSVReporter CSVR;
-  struct ReporterTest {
-    const char* name;
-    std::vector<TestCase>& output_cases;
-    std::vector<TestCase>& error_cases;
-    benchmark::BenchmarkReporter& reporter;
-    std::stringstream out_stream;
-    std::stringstream err_stream;
-
-    ReporterTest(const char* n, std::vector<TestCase>& out_tc,
-                 std::vector<TestCase>& err_tc,
-                 benchmark::BenchmarkReporter& br)
-        : name(n), output_cases(out_tc), error_cases(err_tc), reporter(br) {
-      reporter.SetOutputStream(&out_stream);
-      reporter.SetErrorStream(&err_stream);
-    }
-  } TestCases[] = {
-      {"ConsoleReporter", GetTestCaseList(TC_ConsoleOut),
-       GetTestCaseList(TC_ConsoleErr), CR},
-      {"JSONReporter", GetTestCaseList(TC_JSONOut), GetTestCaseList(TC_JSONErr),
-       JR},
-      {"CSVReporter", GetTestCaseList(TC_CSVOut), GetTestCaseList(TC_CSVErr),
-       CSVR},
-  };
-
-  // Create the test reporter and run the benchmarks.
-  std::cout << "Running benchmarks...\n";
-  internal::TestReporter test_rep({&CR, &JR, &CSVR});
-  benchmark::RunSpecifiedBenchmarks(&test_rep);
-
-  for (auto& rep_test : TestCases) {
-    std::string msg = std::string("\nTesting ") + rep_test.name + " Output\n";
-    std::string banner(msg.size() - 1, '-');
-    std::cout << banner << msg << banner << "\n";
-
-    std::cerr << rep_test.err_stream.str();
-    std::cout << rep_test.out_stream.str();
-
-    internal::CheckCases(rep_test.error_cases, rep_test.err_stream);
-    internal::CheckCases(rep_test.output_cases, rep_test.out_stream);
-
-    std::cout << "\n";
-  }
-
-  // now that we know the output is as expected, we can dispatch
-  // the checks to subscribees.
-  auto& csv = TestCases[2];
-  // would use == but gcc spits a warning
-  CHECK(std::strcmp(csv.name, "CSVReporter") == 0);
-  internal::GetResultsChecker().CheckResults(csv.out_stream);
-}
-
-int SubstrCnt(const std::string& haystack, const std::string& pat) {
-  if (pat.length() == 0) return 0;
-  int count = 0;
-  for (size_t offset = haystack.find(pat); offset != std::string::npos;
-       offset = haystack.find(pat, offset + pat.length()))
-    ++count;
-  return count;
-}
-
-static char ToHex(int ch) {
-  return ch < 10 ? static_cast<char>('0' + ch)
-                 : static_cast<char>('a' + (ch - 10));
-}
-
-static char RandomHexChar() {
-  static std::mt19937 rd{std::random_device{}()};
-  static std::uniform_int_distribution<int> mrand{0, 15};
-  return ToHex(mrand(rd));
-}
-
-static std::string GetRandomFileName() {
-  std::string model = "test.%%%%%%";
-  for (auto & ch :  model) {
-    if (ch == '%')
-      ch = RandomHexChar();
-  }
-  return model;
-}
-
-static bool FileExists(std::string const& name) {
-  std::ifstream in(name.c_str());
-  return in.good();
-}
-
-static std::string GetTempFileName() {
-  // This function attempts to avoid race conditions where two tests
-  // create the same file at the same time. However, it still introduces races
-  // similar to tmpnam.
-  int retries = 3;
-  while (--retries) {
-    std::string name = GetRandomFileName();
-    if (!FileExists(name))
-      return name;
-  }
-  std::cerr << "Failed to create unique temporary file name" << std::endl;
-  std::abort();
-}
-
-std::string GetFileReporterOutput(int argc, char* argv[]) {
-  std::vector<char*> new_argv(argv, argv + argc);
-  assert(static_cast<decltype(new_argv)::size_type>(argc) == new_argv.size());
-
-  std::string tmp_file_name = GetTempFileName();
-  std::cout << "Will be using this as the tmp file: " << tmp_file_name << '\n';
-
-  std::string tmp = "--benchmark_out=";
-  tmp += tmp_file_name;
-  new_argv.emplace_back(const_cast<char*>(tmp.c_str()));
-
-  argc = int(new_argv.size());
-
-  benchmark::Initialize(&argc, new_argv.data());
-  benchmark::RunSpecifiedBenchmarks();
-
-  // Read the output back from the file, and delete the file.
-  std::ifstream tmp_stream(tmp_file_name);
-  std::string output = std::string((std::istreambuf_iterator<char>(tmp_stream)),
-                                   std::istreambuf_iterator<char>());
-  std::remove(tmp_file_name.c_str());
-
-  return output;
-}
diff --git a/third_party/google-benchmark/test/register_benchmark_test.cc b/third_party/google-benchmark/test/register_benchmark_test.cc
deleted file mode 100644
index 3ac5b21..0000000
--- a/third_party/google-benchmark/test/register_benchmark_test.cc
+++ /dev/null
@@ -1,184 +0,0 @@
-
-#undef NDEBUG
-#include <cassert>
-#include <vector>
-
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual void ReportRuns(const std::vector<Run>& report) {
-    all_runs_.insert(all_runs_.end(), begin(report), end(report));
-    ConsoleReporter::ReportRuns(report);
-  }
-
-  std::vector<Run> all_runs_;
-};
-
-struct TestCase {
-  std::string name;
-  const char* label;
-  // Note: not explicit as we rely on it being converted through ADD_CASES.
-  TestCase(const char* xname) : TestCase(xname, nullptr) {}
-  TestCase(const char* xname, const char* xlabel)
-      : name(xname), label(xlabel) {}
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-
-  void CheckRun(Run const& run) const {
-    // clang-format off
-    CHECK(name == run.benchmark_name()) << "expected " << name << " got "
-                                      << run.benchmark_name();
-    if (label) {
-      CHECK(run.report_label == label) << "expected " << label << " got "
-                                       << run.report_label;
-    } else {
-      CHECK(run.report_label == "");
-    }
-    // clang-format on
-  }
-};
-
-std::vector<TestCase> ExpectedResults;
-
-int AddCases(std::initializer_list<TestCase> const& v) {
-  for (auto N : v) {
-    ExpectedResults.push_back(N);
-  }
-  return 0;
-}
-
-#define CONCAT(x, y) CONCAT2(x, y)
-#define CONCAT2(x, y) x##y
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases({__VA_ARGS__})
-
-}  // end namespace
-
-typedef benchmark::internal::Benchmark* ReturnVal;
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with no additional arguments
-//----------------------------------------------------------------------------//
-void BM_function(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_function);
-ReturnVal dummy = benchmark::RegisterBenchmark(
-    "BM_function_manual_registration", BM_function);
-ADD_CASES({"BM_function"}, {"BM_function_manual_registration"});
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with additional arguments
-// Note: GCC <= 4.8 do not support this form of RegisterBenchmark because they
-//       reject the variadic pack expansion of lambda captures.
-//----------------------------------------------------------------------------//
-#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-
-void BM_extra_args(benchmark::State& st, const char* label) {
-  for (auto _ : st) {
-  }
-  st.SetLabel(label);
-}
-int RegisterFromFunction() {
-  std::pair<const char*, const char*> cases[] = {
-      {"test1", "One"}, {"test2", "Two"}, {"test3", "Three"}};
-  for (auto const& c : cases)
-    benchmark::RegisterBenchmark(c.first, &BM_extra_args, c.second);
-  return 0;
-}
-int dummy2 = RegisterFromFunction();
-ADD_CASES({"test1", "One"}, {"test2", "Two"}, {"test3", "Three"});
-
-#endif  // BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with different callable types
-//----------------------------------------------------------------------------//
-
-struct CustomFixture {
-  void operator()(benchmark::State& st) {
-    for (auto _ : st) {
-    }
-  }
-};
-
-void TestRegistrationAtRuntime() {
-#ifdef BENCHMARK_HAS_CXX11
-  {
-    CustomFixture fx;
-    benchmark::RegisterBenchmark("custom_fixture", fx);
-    AddCases({"custom_fixture"});
-  }
-#endif
-#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-  {
-    const char* x = "42";
-    auto capturing_lam = [=](benchmark::State& st) {
-      for (auto _ : st) {
-      }
-      st.SetLabel(x);
-    };
-    benchmark::RegisterBenchmark("lambda_benchmark", capturing_lam);
-    AddCases({{"lambda_benchmark", x}});
-  }
-#endif
-}
-
-// Test that all benchmarks, registered at either during static init or runtime,
-// are run and the results are passed to the reported.
-void RunTestOne() {
-  TestRegistrationAtRuntime();
-
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-}
-
-// Test that ClearRegisteredBenchmarks() clears all previously registered
-// benchmarks.
-// Also test that new benchmarks can be registered and ran afterwards.
-void RunTestTwo() {
-  assert(ExpectedResults.size() != 0 &&
-         "must have at least one registered benchmark");
-  ExpectedResults.clear();
-  benchmark::ClearRegisteredBenchmarks();
-
-  TestReporter test_reporter;
-  size_t num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
-  assert(num_ran == 0);
-  assert(test_reporter.all_runs_.begin() == test_reporter.all_runs_.end());
-
-  TestRegistrationAtRuntime();
-  num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
-  assert(num_ran == ExpectedResults.size());
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-}
-
-int main(int argc, char* argv[]) {
-  benchmark::Initialize(&argc, argv);
-
-  RunTestOne();
-  RunTestTwo();
-}
diff --git a/third_party/google-benchmark/test/report_aggregates_only_test.cc b/third_party/google-benchmark/test/report_aggregates_only_test.cc
deleted file mode 100644
index 9646b9b..0000000
--- a/third_party/google-benchmark/test/report_aggregates_only_test.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-
-#undef NDEBUG
-#include <cstdio>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// Ok this test is super ugly. We want to check what happens with the file
-// reporter in the presence of ReportAggregatesOnly().
-// We do not care about console output, the normal tests check that already.
-
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
-
-int main(int argc, char* argv[]) {
-  const std::string output = GetFileReporterOutput(argc, argv);
-
-  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 3 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
-          1) {
-    std::cout << "Precondition mismatch. Expected to only find three "
-                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"\nThe entire "
-                 "output:\n";
-    std::cout << output;
-    return 1;
-  }
-
-  return 0;
-}
diff --git a/third_party/google-benchmark/test/reporter_output_test.cc b/third_party/google-benchmark/test/reporter_output_test.cc
deleted file mode 100644
index ec6d51b..0000000
--- a/third_party/google-benchmark/test/reporter_output_test.cc
+++ /dev/null
@@ -1,604 +0,0 @@
-
-#undef NDEBUG
-#include <utility>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ---------------------- Testing Prologue Output -------------------------- //
-// ========================================================================= //
-
-ADD_CASES(TC_ConsoleOut, {{"^[-]+$", MR_Next},
-                          {"^Benchmark %s Time %s CPU %s Iterations$", MR_Next},
-                          {"^[-]+$", MR_Next}});
-static int AddContextCases() {
-  AddCases(TC_ConsoleErr,
-           {
-               {"%int[-/]%int[-/]%int %int:%int:%int$", MR_Default},
-               {"Running .*/reporter_output_test(\\.exe)?$", MR_Next},
-               {"Run on \\(%int X %float MHz CPU s?\\)", MR_Next},
-           });
-  AddCases(TC_JSONOut,
-           {{"^\\{", MR_Default},
-            {"\"context\":", MR_Next},
-            {"\"date\": \"", MR_Next},
-            {"\"host_name\":", MR_Next},
-            {"\"executable\": \".*(/|\\\\)reporter_output_test(\\.exe)?\",",
-             MR_Next},
-            {"\"num_cpus\": %int,$", MR_Next},
-            {"\"mhz_per_cpu\": %float,$", MR_Next},
-            {"\"cpu_scaling_enabled\": ", MR_Next},
-            {"\"caches\": \\[$", MR_Next}});
-  auto const& Info = benchmark::CPUInfo::Get();
-  auto const& Caches = Info.caches;
-  if (!Caches.empty()) {
-    AddCases(TC_ConsoleErr, {{"CPU Caches:$", MR_Next}});
-  }
-  for (size_t I = 0; I < Caches.size(); ++I) {
-    std::string num_caches_str =
-        Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
-    AddCases(
-        TC_ConsoleErr,
-        {{"L%int (Data|Instruction|Unified) %intK" + num_caches_str, MR_Next}});
-    AddCases(TC_JSONOut, {{"\\{$", MR_Next},
-                          {"\"type\": \"", MR_Next},
-                          {"\"level\": %int,$", MR_Next},
-                          {"\"size\": %int,$", MR_Next},
-                          {"\"num_sharing\": %int$", MR_Next},
-                          {"}[,]{0,1}$", MR_Next}});
-  }
-  AddCases(TC_JSONOut, {{"],$"}});
-  auto const& LoadAvg = Info.load_avg;
-  if (!LoadAvg.empty()) {
-    AddCases(TC_ConsoleErr,
-             {{"Load Average: (%float, ){0,2}%float$", MR_Next}});
-  }
-  AddCases(TC_JSONOut, {{"\"load_avg\": \\[(%float,?){0,3}],$", MR_Next}});
-  return 0;
-}
-int dummy_register = AddContextCases();
-ADD_CASES(TC_CSVOut, {{"%csv_header"}});
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-void BM_basic(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_basic);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_basic %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_basic\",$"},
-                       {"\"run_name\": \"BM_basic\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_basic\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Bytes per Second Output ---------------- //
-// ========================================================================= //
-
-void BM_bytes_per_second(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetBytesProcessed(1);
-}
-BENCHMARK(BM_bytes_per_second);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_bytes_per_second %console_report "
-                           "bytes_per_second=%float[kM]{0,1}/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_bytes_per_second\",$"},
-                       {"\"run_name\": \"BM_bytes_per_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bytes_per_second\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_bytes_per_second\",%csv_bytes_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Items per Second Output ---------------- //
-// ========================================================================= //
-
-void BM_items_per_second(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetItemsProcessed(1);
-}
-BENCHMARK(BM_items_per_second);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_items_per_second %console_report "
-                           "items_per_second=%float[kM]{0,1}/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_items_per_second\",$"},
-                       {"\"run_name\": \"BM_items_per_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"items_per_second\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_items_per_second\",%csv_items_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Label Output --------------------------- //
-// ========================================================================= //
-
-void BM_label(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetLabel("some label");
-}
-BENCHMARK(BM_label);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_label %console_report some label$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_label\",$"},
-                       {"\"run_name\": \"BM_label\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"label\": \"some label\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_label\",%csv_label_report_begin\"some "
-                       "label\"%csv_label_report_end$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Error Output --------------------------- //
-// ========================================================================= //
-
-void BM_error(benchmark::State& state) {
-  state.SkipWithError("message");
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_error);
-ADD_CASES(TC_ConsoleOut, {{"^BM_error[ ]+ERROR OCCURRED: 'message'$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_error\",$"},
-                       {"\"run_name\": \"BM_error\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"error_occurred\": true,$", MR_Next},
-                       {"\"error_message\": \"message\",$", MR_Next}});
-
-ADD_CASES(TC_CSVOut, {{"^\"BM_error\",,,,,,,,true,\"message\"$"}});
-
-// ========================================================================= //
-// ------------------------ Testing No Arg Name Output -----------------------
-// //
-// ========================================================================= //
-
-void BM_no_arg_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_no_arg_name)->Arg(3);
-ADD_CASES(TC_ConsoleOut, {{"^BM_no_arg_name/3 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_no_arg_name/3\",$"},
-                       {"\"run_name\": \"BM_no_arg_name/3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_no_arg_name/3\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Arg Name Output ----------------------- //
-// ========================================================================= //
-
-void BM_arg_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_arg_name)->ArgName("first")->Arg(3);
-ADD_CASES(TC_ConsoleOut, {{"^BM_arg_name/first:3 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_name/first:3\",$"},
-                       {"\"run_name\": \"BM_arg_name/first:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_arg_name/first:3\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Arg Names Output ----------------------- //
-// ========================================================================= //
-
-void BM_arg_names(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_arg_names)->Args({2, 5, 4})->ArgNames({"first", "", "third"});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_arg_names/first:2/5/third:4 %console_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_arg_names/first:2/5/third:4\",$"},
-           {"\"run_name\": \"BM_arg_names/first:2/5/third:4\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_arg_names/first:2/5/third:4\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Big Args Output ------------------------ //
-// ========================================================================= //
-
-void BM_BigArgs(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_BigArgs)->RangeMultiplier(2)->Range(1U << 30U, 1U << 31U);
-ADD_CASES(TC_ConsoleOut, {{"^BM_BigArgs/1073741824 %console_report$"},
-                          {"^BM_BigArgs/2147483648 %console_report$"}});
-
-// ========================================================================= //
-// ----------------------- Testing Complexity Output ----------------------- //
-// ========================================================================= //
-
-void BM_Complexity_O1(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
-SET_SUBSTITUTIONS({{"%bigOStr", "[ ]* %float \\([0-9]+\\)"},
-                   {"%RMS", "[ ]*[0-9]+ %"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_Complexity_O1_BigO %bigOStr %bigOStr[ ]*$"},
-                          {"^BM_Complexity_O1_RMS %RMS %RMS[ ]*$"}});
-
-// ========================================================================= //
-// ----------------------- Testing Aggregate Output ------------------------ //
-// ========================================================================= //
-
-// Test that non-aggregate data is printed by default
-void BM_Repeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-// need two repetitions min to be able to output any aggregate output
-BENCHMARK(BM_Repeat)->Repetitions(2);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:2 %console_report$"},
-           {"^BM_Repeat/repeats:2 %console_report$"},
-           {"^BM_Repeat/repeats:2_mean %console_time_only_report [ ]*2$"},
-           {"^BM_Repeat/repeats:2_median %console_time_only_report [ ]*2$"},
-           {"^BM_Repeat/repeats:2_stddev %console_time_only_report [ ]*2$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:2\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\"", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_mean\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_median\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_stddev\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:2\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_stddev\",%csv_report$"}});
-// but for two repetitions, mean and median is the same, so let's repeat..
-BENCHMARK(BM_Repeat)->Repetitions(3);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3_mean %console_time_only_report [ ]*3$"},
-           {"^BM_Repeat/repeats:3_median %console_time_only_report [ ]*3$"},
-           {"^BM_Repeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_mean\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_median\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_stddev\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_stddev\",%csv_report$"}});
-// median differs between even/odd number of repetitions, so just to be sure
-BENCHMARK(BM_Repeat)->Repetitions(4);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4_mean %console_time_only_report [ ]*4$"},
-           {"^BM_Repeat/repeats:4_median %console_time_only_report [ ]*4$"},
-           {"^BM_Repeat/repeats:4_stddev %console_time_only_report [ ]*4$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_mean\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_median\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_stddev\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_stddev\",%csv_report$"}});
-
-// Test that a non-repeated test still prints non-aggregate results even when
-// only-aggregate reports have been requested
-void BM_RepeatOnce(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_RepeatOnce)->Repetitions(1)->ReportAggregatesOnly();
-ADD_CASES(TC_ConsoleOut, {{"^BM_RepeatOnce/repeats:1 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_RepeatOnce/repeats:1\",$"},
-                       {"\"run_name\": \"BM_RepeatOnce/repeats:1\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_RepeatOnce/repeats:1\",%csv_report$"}});
-
-// Test that non-aggregate data is not reported
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-     {"^BM_SummaryRepeat/repeats:3_mean %console_time_only_report [ ]*3$"},
-     {"^BM_SummaryRepeat/repeats:3_median %console_time_only_report [ ]*3$"},
-     {"^BM_SummaryRepeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_mean\",$"},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_median\",$"},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_stddev\",$"},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-                      {"^\"BM_SummaryRepeat/repeats:3_mean\",%csv_report$"},
-                      {"^\"BM_SummaryRepeat/repeats:3_median\",%csv_report$"},
-                      {"^\"BM_SummaryRepeat/repeats:3_stddev\",%csv_report$"}});
-
-// Test that non-aggregate data is not displayed.
-// NOTE: this test is kinda bad. we are only testing the display output.
-//       But we don't check that the file output still contains everything...
-void BM_SummaryDisplay(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryDisplay)->Repetitions(2)->DisplayAggregatesOnly();
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-     {"^BM_SummaryDisplay/repeats:2_mean %console_time_only_report [ ]*2$"},
-     {"^BM_SummaryDisplay/repeats:2_median %console_time_only_report [ ]*2$"},
-     {"^BM_SummaryDisplay/repeats:2_stddev %console_time_only_report [ ]*2$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_mean\",$"},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_median\",$"},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_stddev\",$"},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-           {"^\"BM_SummaryDisplay/repeats:2_mean\",%csv_report$"},
-           {"^\"BM_SummaryDisplay/repeats:2_median\",%csv_report$"},
-           {"^\"BM_SummaryDisplay/repeats:2_stddev\",%csv_report$"}});
-
-// Test repeats with custom time unit.
-void BM_RepeatTimeUnit(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_RepeatTimeUnit)
-    ->Repetitions(3)
-    ->ReportAggregatesOnly()
-    ->Unit(benchmark::kMicrosecond);
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-     {"^BM_RepeatTimeUnit/repeats:3_mean %console_us_time_only_report [ ]*3$"},
-     {"^BM_RepeatTimeUnit/repeats:3_median %console_us_time_only_report [ "
-      "]*3$"},
-     {"^BM_RepeatTimeUnit/repeats:3_stddev %console_us_time_only_report [ "
-      "]*3$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_mean\",$"},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_median\",$"},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_stddev\",$"},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"}});
-ADD_CASES(TC_CSVOut,
-          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-           {"^\"BM_RepeatTimeUnit/repeats:3_mean\",%csv_us_report$"},
-           {"^\"BM_RepeatTimeUnit/repeats:3_median\",%csv_us_report$"},
-           {"^\"BM_RepeatTimeUnit/repeats:3_stddev\",%csv_us_report$"}});
-
-// ========================================================================= //
-// -------------------- Testing user-provided statistics ------------------- //
-// ========================================================================= //
-
-const auto UserStatistics = [](const std::vector<double>& v) {
-  return v.back();
-};
-void BM_UserStats(benchmark::State& state) {
-  for (auto _ : state) {
-    state.SetIterationTime(150 / 10e8);
-  }
-}
-// clang-format off
-BENCHMARK(BM_UserStats)
-  ->Repetitions(3)
-  ->Iterations(5)
-  ->UseManualTime()
-  ->ComputeStatistics("", UserStatistics);
-// clang-format on
-
-// check that user-provided stats is calculated, and is after the default-ones
-// empty string as name is intentional, it would sort before anything else
-ADD_CASES(TC_ConsoleOut, {{"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_median [ ]* 150 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time_ "
-                           "[ ]* 150 ns %time [ ]*3$"}});
-ADD_CASES(
-    TC_JSONOut,
-    {{"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"mean\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_median\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"median\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_stddev\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"stddev\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": %float,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/"
-      "manual_time_median\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/"
-      "manual_time_stddev\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_\",%csv_report$"}});
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/third_party/google-benchmark/test/skip_with_error_test.cc b/third_party/google-benchmark/test/skip_with_error_test.cc
deleted file mode 100644
index 0657977..0000000
--- a/third_party/google-benchmark/test/skip_with_error_test.cc
+++ /dev/null
@@ -1,189 +0,0 @@
-
-#undef NDEBUG
-#include <cassert>
-#include <vector>
-
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) {
-    all_runs_.insert(all_runs_.end(), begin(report), end(report));
-    ConsoleReporter::ReportRuns(report);
-  }
-
-  TestReporter() {}
-  virtual ~TestReporter() {}
-
-  mutable std::vector<Run> all_runs_;
-};
-
-struct TestCase {
-  std::string name;
-  bool error_occurred;
-  std::string error_message;
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-
-  void CheckRun(Run const& run) const {
-    CHECK(name == run.benchmark_name())
-        << "expected " << name << " got " << run.benchmark_name();
-    CHECK(error_occurred == run.error_occurred);
-    CHECK(error_message == run.error_message);
-    if (error_occurred) {
-      // CHECK(run.iterations == 0);
-    } else {
-      CHECK(run.iterations != 0);
-    }
-  }
-};
-
-std::vector<TestCase> ExpectedResults;
-
-int AddCases(const char* base_name, std::initializer_list<TestCase> const& v) {
-  for (auto TC : v) {
-    TC.name = base_name + TC.name;
-    ExpectedResults.push_back(std::move(TC));
-  }
-  return 0;
-}
-
-#define CONCAT(x, y) CONCAT2(x, y)
-#define CONCAT2(x, y) x##y
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases(__VA_ARGS__)
-
-}  // end namespace
-
-void BM_error_before_running(benchmark::State& state) {
-  state.SkipWithError("error message");
-  while (state.KeepRunning()) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running);
-ADD_CASES("BM_error_before_running", {{"", true, "error message"}});
-
-void BM_error_before_running_batch(benchmark::State& state) {
-  state.SkipWithError("error message");
-  while (state.KeepRunningBatch(17)) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running_batch);
-ADD_CASES("BM_error_before_running_batch", {{"", true, "error message"}});
-
-void BM_error_before_running_range_for(benchmark::State& state) {
-  state.SkipWithError("error message");
-  for (auto _ : state) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running_range_for);
-ADD_CASES("BM_error_before_running_range_for", {{"", true, "error message"}});
-
-void BM_error_during_running(benchmark::State& state) {
-  int first_iter = true;
-  while (state.KeepRunning()) {
-    if (state.range(0) == 1 && state.thread_index <= (state.threads / 2)) {
-      assert(first_iter);
-      first_iter = false;
-      state.SkipWithError("error message");
-    } else {
-      state.PauseTiming();
-      state.ResumeTiming();
-    }
-  }
-}
-BENCHMARK(BM_error_during_running)->Arg(1)->Arg(2)->ThreadRange(1, 8);
-ADD_CASES("BM_error_during_running", {{"/1/threads:1", true, "error message"},
-                                      {"/1/threads:2", true, "error message"},
-                                      {"/1/threads:4", true, "error message"},
-                                      {"/1/threads:8", true, "error message"},
-                                      {"/2/threads:1", false, ""},
-                                      {"/2/threads:2", false, ""},
-                                      {"/2/threads:4", false, ""},
-                                      {"/2/threads:8", false, ""}});
-
-void BM_error_during_running_ranged_for(benchmark::State& state) {
-  assert(state.max_iterations > 3 && "test requires at least a few iterations");
-  int first_iter = true;
-  // NOTE: Users should not write the for loop explicitly.
-  for (auto It = state.begin(), End = state.end(); It != End; ++It) {
-    if (state.range(0) == 1) {
-      assert(first_iter);
-      first_iter = false;
-      state.SkipWithError("error message");
-      // Test the unfortunate but documented behavior that the ranged-for loop
-      // doesn't automatically terminate when SkipWithError is set.
-      assert(++It != End);
-      break;  // Required behavior
-    }
-  }
-}
-BENCHMARK(BM_error_during_running_ranged_for)->Arg(1)->Arg(2)->Iterations(5);
-ADD_CASES("BM_error_during_running_ranged_for",
-          {{"/1/iterations:5", true, "error message"},
-           {"/2/iterations:5", false, ""}});
-
-void BM_error_after_running(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  if (state.thread_index <= (state.threads / 2))
-    state.SkipWithError("error message");
-}
-BENCHMARK(BM_error_after_running)->ThreadRange(1, 8);
-ADD_CASES("BM_error_after_running", {{"/threads:1", true, "error message"},
-                                     {"/threads:2", true, "error message"},
-                                     {"/threads:4", true, "error message"},
-                                     {"/threads:8", true, "error message"}});
-
-void BM_error_while_paused(benchmark::State& state) {
-  bool first_iter = true;
-  while (state.KeepRunning()) {
-    if (state.range(0) == 1 && state.thread_index <= (state.threads / 2)) {
-      assert(first_iter);
-      first_iter = false;
-      state.PauseTiming();
-      state.SkipWithError("error message");
-    } else {
-      state.PauseTiming();
-      state.ResumeTiming();
-    }
-  }
-}
-BENCHMARK(BM_error_while_paused)->Arg(1)->Arg(2)->ThreadRange(1, 8);
-ADD_CASES("BM_error_while_paused", {{"/1/threads:1", true, "error message"},
-                                    {"/1/threads:2", true, "error message"},
-                                    {"/1/threads:4", true, "error message"},
-                                    {"/1/threads:8", true, "error message"},
-                                    {"/2/threads:1", false, ""},
-                                    {"/2/threads:2", false, ""},
-                                    {"/2/threads:4", false, ""},
-                                    {"/2/threads:8", false, ""}});
-
-int main(int argc, char* argv[]) {
-  benchmark::Initialize(&argc, argv);
-
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-
-  return 0;
-}
diff --git a/third_party/google-benchmark/test/state_assembly_test.cc b/third_party/google-benchmark/test/state_assembly_test.cc
deleted file mode 100644
index abe9a4d..0000000
--- a/third_party/google-benchmark/test/state_assembly_test.cc
+++ /dev/null
@@ -1,68 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-// clang-format off
-extern "C" {
-  extern int ExternInt;
-  benchmark::State& GetState();
-  void Fn();
-}
-// clang-format on
-
-using benchmark::State;
-
-// CHECK-LABEL: test_for_auto_loop:
-extern "C" int test_for_auto_loop() {
-  State& S = GetState();
-  int x = 42;
-  // CHECK: 	[[CALL:call(q)*]]	_ZN9benchmark5State16StartKeepRunningEv
-  // CHECK-NEXT: testq %rbx, %rbx
-  // CHECK-NEXT: je [[LOOP_END:.*]]
-
-  for (auto _ : S) {
-    // CHECK: .L[[LOOP_HEAD:[a-zA-Z0-9_]+]]:
-    // CHECK-GNU-NEXT: subq $1, %rbx
-    // CHECK-CLANG-NEXT: {{(addq \$1,|incq)}} %rax
-    // CHECK-NEXT: jne .L[[LOOP_HEAD]]
-    benchmark::DoNotOptimize(x);
-  }
-  // CHECK: [[LOOP_END]]:
-  // CHECK: [[CALL]]	_ZN9benchmark5State17FinishKeepRunningEv
-
-  // CHECK: movl $101, %eax
-  // CHECK: ret
-  return 101;
-}
-
-// CHECK-LABEL: test_while_loop:
-extern "C" int test_while_loop() {
-  State& S = GetState();
-  int x = 42;
-
-  // CHECK: j{{(e|mp)}} .L[[LOOP_HEADER:[a-zA-Z0-9_]+]]
-  // CHECK-NEXT: .L[[LOOP_BODY:[a-zA-Z0-9_]+]]:
-  while (S.KeepRunning()) {
-    // CHECK-GNU-NEXT: subq $1, %[[IREG:[a-z]+]]
-    // CHECK-CLANG-NEXT: {{(addq \$-1,|decq)}} %[[IREG:[a-z]+]]
-    // CHECK: movq %[[IREG]], [[DEST:.*]]
-    benchmark::DoNotOptimize(x);
-  }
-  // CHECK-DAG: movq [[DEST]], %[[IREG]]
-  // CHECK-DAG: testq %[[IREG]], %[[IREG]]
-  // CHECK-DAG: jne .L[[LOOP_BODY]]
-  // CHECK-DAG: .L[[LOOP_HEADER]]:
-
-  // CHECK: cmpb $0
-  // CHECK-NEXT: jne .L[[LOOP_END:[a-zA-Z0-9_]+]]
-  // CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv
-
-  // CHECK: .L[[LOOP_END]]:
-  // CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv
-
-  // CHECK: movl $101, %eax
-  // CHECK: ret
-  return 101;
-}
diff --git a/third_party/google-benchmark/test/statistics_gtest.cc b/third_party/google-benchmark/test/statistics_gtest.cc
deleted file mode 100644
index 99e3149..0000000
--- a/third_party/google-benchmark/test/statistics_gtest.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-//===---------------------------------------------------------------------===//
-// statistics_test - Unit tests for src/statistics.cc
-//===---------------------------------------------------------------------===//
-
-#include "../src/statistics.h"
-#include "gtest/gtest.h"
-
-namespace {
-TEST(StatisticsTest, Mean) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({42, 42, 42, 42}), 42.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 3, 4}), 2.5);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 5, 10, 10, 14}), 7.0);
-}
-
-TEST(StatisticsTest, Median) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({42, 42, 42, 42}), 42.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 3, 4}), 2.5);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 5, 10, 10}), 5.0);
-}
-
-TEST(StatisticsTest, StdDev) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({101, 101, 101, 101}), 0.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({1, 2, 3}), 1.0);
-  EXPECT_FLOAT_EQ(benchmark::StatisticsStdDev({1.5, 2.4, 3.3, 4.2, 5.1}),
-                  1.42302495);
-}
-
-}  // end namespace
diff --git a/third_party/google-benchmark/test/string_util_gtest.cc b/third_party/google-benchmark/test/string_util_gtest.cc
deleted file mode 100644
index 2c5d073..0000000
--- a/third_party/google-benchmark/test/string_util_gtest.cc
+++ /dev/null
@@ -1,146 +0,0 @@
-//===---------------------------------------------------------------------===//
-// statistics_test - Unit tests for src/statistics.cc
-//===---------------------------------------------------------------------===//
-
-#include "../src/string_util.h"
-#include "gtest/gtest.h"
-
-namespace {
-TEST(StringUtilTest, stoul) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0ul, benchmark::stoul("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(7ul, benchmark::stoul("7", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(135ul, benchmark::stoul("135", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-#if ULONG_MAX == 0xFFFFFFFFul
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xFFFFFFFFul, benchmark::stoul("4294967295", &pos));
-    EXPECT_EQ(10ul, pos);
-  }
-#elif ULONG_MAX == 0xFFFFFFFFFFFFFFFFul
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xFFFFFFFFFFFFFFFFul, benchmark::stoul("18446744073709551615", &pos));
-    EXPECT_EQ(20ul, pos);
-  }
-#endif
-  {
-    size_t pos = 0;
-    EXPECT_EQ(10ul, benchmark::stoul("1010", &pos, 2));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(520ul, benchmark::stoul("1010", &pos, 8));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1010ul, benchmark::stoul("1010", &pos, 10));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(4112ul, benchmark::stoul("1010", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xBEEFul, benchmark::stoul("BEEF", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    ASSERT_THROW(benchmark::stoul("this is a test"), std::invalid_argument);
-  }
-}
-
-TEST(StringUtilTest, stoi) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0, benchmark::stoi("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(-17, benchmark::stoi("-17", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1357, benchmark::stoi("1357", &pos));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(10, benchmark::stoi("1010", &pos, 2));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(520, benchmark::stoi("1010", &pos, 8));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1010, benchmark::stoi("1010", &pos, 10));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(4112, benchmark::stoi("1010", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xBEEF, benchmark::stoi("BEEF", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    ASSERT_THROW(benchmark::stoi("this is a test"), std::invalid_argument);
-  }
-}
-
-TEST(StringUtilTest, stod) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0.0, benchmark::stod("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(-84.0, benchmark::stod("-84", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1234.0, benchmark::stod("1234", &pos));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1.5, benchmark::stod("1.5", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-  {
-    size_t pos = 0;
-    /* Note: exactly representable as double */
-    EXPECT_EQ(-1.25e+9, benchmark::stod("-1.25e+9", &pos));
-    EXPECT_EQ(8ul, pos);
-  }
-  {
-    ASSERT_THROW(benchmark::stod("this is a test"), std::invalid_argument);
-  }
-}
-
-}  // end namespace
diff --git a/third_party/google-benchmark/test/templated_fixture_test.cc b/third_party/google-benchmark/test/templated_fixture_test.cc
deleted file mode 100644
index fe9865c..0000000
--- a/third_party/google-benchmark/test/templated_fixture_test.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <memory>
-
-template <typename T>
-class MyFixture : public ::benchmark::Fixture {
- public:
-  MyFixture() : data(0) {}
-
-  T data;
-};
-
-BENCHMARK_TEMPLATE_F(MyFixture, Foo, int)(benchmark::State& st) {
-  for (auto _ : st) {
-    data += 1;
-  }
-}
-
-BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, Bar, double)(benchmark::State& st) {
-  for (auto _ : st) {
-    data += 1.0;
-  }
-}
-BENCHMARK_REGISTER_F(MyFixture, Bar);
-
-BENCHMARK_MAIN();
diff --git a/third_party/google-benchmark/test/user_counters_tabular_test.cc b/third_party/google-benchmark/test/user_counters_tabular_test.cc
deleted file mode 100644
index 030e989..0000000
--- a/third_party/google-benchmark/test/user_counters_tabular_test.cc
+++ /dev/null
@@ -1,268 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// @todo: <jpmag> this checks the full output at once; the rule for
-// CounterSet1 was failing because it was not matching "^[-]+$".
-// @todo: <jpmag> check that the counters are vertically aligned.
-ADD_CASES(
-    TC_ConsoleOut,
-    {
-        // keeping these lines long improves readability, so:
-        // clang-format off
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Bat %s Baz %s Foo %s Frob %s Lob$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Baz %s Foo$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bat %s Baz %s Foo$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$"},
-        // clang-format on
-    });
-ADD_CASES(TC_CSVOut, {{"%csv_header,"
-                       "\"Bar\",\"Bat\",\"Baz\",\"Foo\",\"Frob\",\"Lob\""}});
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-void BM_Counters_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {1, bm::Counter::kAvgThreads}},
-      {"Bar", {2, bm::Counter::kAvgThreads}},
-      {"Baz", {4, bm::Counter::kAvgThreads}},
-      {"Bat", {8, bm::Counter::kAvgThreads}},
-      {"Frob", {16, bm::Counter::kAvgThreads}},
-      {"Lob", {32, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_Counters_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Tabular/threads:%int\",%csv_report,"
-                       "%float,%float,%float,%float,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckTabular(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 2);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 4);
-  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 8);
-  CHECK_COUNTER_VALUE(e, int, "Frob", EQ, 16);
-  CHECK_COUNTER_VALUE(e, int, "Lob", EQ, 32);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/threads:%int", &CheckTabular);
-
-// ========================================================================= //
-// -------------------- Tabular+Rate Counters Output ----------------------- //
-// ========================================================================= //
-
-void BM_CounterRates_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {1, bm::Counter::kAvgThreadsRate}},
-      {"Bar", {2, bm::Counter::kAvgThreadsRate}},
-      {"Baz", {4, bm::Counter::kAvgThreadsRate}},
-      {"Bat", {8, bm::Counter::kAvgThreadsRate}},
-      {"Frob", {16, bm::Counter::kAvgThreadsRate}},
-      {"Lob", {32, bm::Counter::kAvgThreadsRate}},
-  });
-}
-BENCHMARK(BM_CounterRates_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterRates_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterRates_Tabular/threads:%int\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterRates_Tabular/threads:%int\",%csv_report,"
-                       "%float,%float,%float,%float,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckTabularRate(Results const& e) {
-  double t = e.DurationCPUTime();
-  CHECK_FLOAT_COUNTER_VALUE(e, "Foo", EQ, 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Bar", EQ, 2. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Baz", EQ, 4. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Bat", EQ, 8. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Frob", EQ, 16. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Lob", EQ, 32. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterRates_Tabular/threads:%int",
-                        &CheckTabularRate);
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-// set only some of the counters
-void BM_CounterSet0_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {10, bm::Counter::kAvgThreads}},
-      {"Bar", {20, bm::Counter::kAvgThreads}},
-      {"Baz", {40, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet0_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet0_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterSet0_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet0_Tabular/threads:%int\",%csv_report,"
-                       "%float,,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet0(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 20);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet0_Tabular", &CheckSet0);
-
-// again.
-void BM_CounterSet1_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {15, bm::Counter::kAvgThreads}},
-      {"Bar", {25, bm::Counter::kAvgThreads}},
-      {"Baz", {45, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet1_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet1_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterSet1_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet1_Tabular/threads:%int\",%csv_report,"
-                       "%float,,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet1(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 15);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 25);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 45);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet1_Tabular/threads:%int", &CheckSet1);
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-// set only some of the counters, different set now.
-void BM_CounterSet2_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {10, bm::Counter::kAvgThreads}},
-      {"Bat", {30, bm::Counter::kAvgThreads}},
-      {"Baz", {40, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet2_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet2_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterSet2_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet2_Tabular/threads:%int\",%csv_report,"
-                       ",%float,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet2(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
-  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 30);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet2_Tabular", &CheckSet2);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/third_party/google-benchmark/test/user_counters_test.cc b/third_party/google-benchmark/test/user_counters_test.cc
deleted file mode 100644
index bb0d6b4..0000000
--- a/third_party/google-benchmark/test/user_counters_test.cc
+++ /dev/null
@@ -1,408 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ---------------------- Testing Prologue Output -------------------------- //
-// ========================================================================= //
-
-// clang-format off
-
-ADD_CASES(TC_ConsoleOut,
-          {{"^[-]+$", MR_Next},
-           {"^Benchmark %s Time %s CPU %s Iterations UserCounters...$", MR_Next},
-           {"^[-]+$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"%csv_header,\"bar\",\"foo\""}});
-
-// clang-format on
-
-// ========================================================================= //
-// ------------------------- Simple Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Simple(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = 2 * (double)state.iterations();
-}
-BENCHMARK(BM_Counters_Simple);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Counters_Simple %console_report bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Simple\",$"},
-                       {"\"run_name\": \"BM_Counters_Simple\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Simple\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSimple(Results const& e) {
-  double its = e.NumIterations();
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  // check that the value of bar is within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Simple", &CheckSimple);
-
-// ========================================================================= //
-// --------------------- Counters+Items+Bytes/s Output --------------------- //
-// ========================================================================= //
-
-namespace {
-int num_calls1 = 0;
-}
-void BM_Counters_WithBytesAndItemsPSec(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = ++num_calls1;
-  state.SetBytesProcessed(364);
-  state.SetItemsProcessed(150);
-}
-BENCHMARK(BM_Counters_WithBytesAndItemsPSec);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_WithBytesAndItemsPSec %console_report "
-                           "bar=%hrfloat bytes_per_second=%hrfloat/s "
-                           "foo=%hrfloat items_per_second=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_WithBytesAndItemsPSec\",$"},
-           {"\"run_name\": \"BM_Counters_WithBytesAndItemsPSec\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"bytes_per_second\": %float,$", MR_Next},
-           {"\"foo\": %float,$", MR_Next},
-           {"\"items_per_second\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_WithBytesAndItemsPSec\","
-                       "%csv_bytes_items_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckBytesAndItemsPSec(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, num_calls1);
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_RESULT_VALUE(e, "bytes_per_second", EQ, 364. / t, 0.001);
-  CHECK_FLOAT_RESULT_VALUE(e, "items_per_second", EQ, 150. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_WithBytesAndItemsPSec",
-                        &CheckBytesAndItemsPSec);
-
-// ========================================================================= //
-// ------------------------- Rate Counters Output -------------------------- //
-// ========================================================================= //
-
-void BM_Counters_Rate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsRate};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsRate};
-}
-BENCHMARK(BM_Counters_Rate);
-ADD_CASES(
-    TC_ConsoleOut,
-    {{"^BM_Counters_Rate %console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Rate\",$"},
-                       {"\"run_name\": \"BM_Counters_Rate\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Rate\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckRate(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Rate", &CheckRate);
-
-// ========================================================================= //
-// ------------------------- Thread Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Threads(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = 2;
-}
-BENCHMARK(BM_Counters_Threads)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Threads/threads:%int %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Threads/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_Threads/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_Threads/threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckThreads(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, e.NumThreads());
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2 * e.NumThreads());
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Threads/threads:%int", &CheckThreads);
-
-// ========================================================================= //
-// ---------------------- ThreadAvg Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgThreads(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreads};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreads};
-}
-BENCHMARK(BM_Counters_AvgThreads)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreads/threads:%int "
-                           "%console_report bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgThreads/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_AvgThreads/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_AvgThreads/threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgThreads(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreads/threads:%int",
-                        &CheckAvgThreads);
-
-// ========================================================================= //
-// ---------------------- ThreadAvg Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgThreadsRate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreadsRate};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreadsRate};
-}
-BENCHMARK(BM_Counters_AvgThreadsRate)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreadsRate/threads:%int "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_AvgThreadsRate/"
-                       "threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgThreadsRate(Results const& e) {
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / e.DurationCPUTime(), 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / e.DurationCPUTime(), 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreadsRate/threads:%int",
-                        &CheckAvgThreadsRate);
-
-// ========================================================================= //
-// ------------------- IterationInvariant Counters Output ------------------ //
-// ========================================================================= //
-
-void BM_Counters_IterationInvariant(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsIterationInvariant};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsIterationInvariant};
-}
-BENCHMARK(BM_Counters_IterationInvariant);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_IterationInvariant %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_IterationInvariant\",$"},
-           {"\"run_name\": \"BM_Counters_IterationInvariant\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_IterationInvariant\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckIterationInvariant(Results const& e) {
-  double its = e.NumIterations();
-  // check that the values are within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_IterationInvariant",
-                        &CheckIterationInvariant);
-
-// ========================================================================= //
-// ----------------- IterationInvariantRate Counters Output ---------------- //
-// ========================================================================= //
-
-void BM_Counters_kIsIterationInvariantRate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] =
-      bm::Counter{1, bm::Counter::kIsIterationInvariantRate};
-  state.counters["bar"] =
-      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kIsIterationInvariant};
-}
-BENCHMARK(BM_Counters_kIsIterationInvariantRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kIsIterationInvariantRate "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_kIsIterationInvariantRate\",$"},
-           {"\"run_name\": \"BM_Counters_kIsIterationInvariantRate\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kIsIterationInvariantRate\",%csv_report,"
-                       "%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckIsIterationInvariantRate(Results const& e) {
-  double its = e.NumIterations();
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its * 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, its * 2. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_kIsIterationInvariantRate",
-                        &CheckIsIterationInvariantRate);
-
-// ========================================================================= //
-// ------------------- AvgIterations Counters Output ------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgIterations(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterations};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgIterations};
-}
-BENCHMARK(BM_Counters_AvgIterations);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgIterations %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgIterations\",$"},
-           {"\"run_name\": \"BM_Counters_AvgIterations\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_AvgIterations\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgIterations(Results const& e) {
-  double its = e.NumIterations();
-  // check that the values are within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgIterations", &CheckAvgIterations);
-
-// ========================================================================= //
-// ----------------- AvgIterationsRate Counters Output ---------------- //
-// ========================================================================= //
-
-void BM_Counters_kAvgIterationsRate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterationsRate};
-  state.counters["bar"] =
-      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kAvgIterations};
-}
-BENCHMARK(BM_Counters_kAvgIterationsRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kAvgIterationsRate "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_kAvgIterationsRate\",$"},
-           {"\"run_name\": \"BM_Counters_kAvgIterationsRate\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kAvgIterationsRate\",%csv_report,"
-                       "%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgIterationsRate(Results const& e) {
-  double its = e.NumIterations();
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_kAvgIterationsRate",
-                        &CheckAvgIterationsRate);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/third_party/google-benchmark/test/user_counters_thousands_test.cc b/third_party/google-benchmark/test/user_counters_thousands_test.cc
deleted file mode 100644
index fa0ef97..0000000
--- a/third_party/google-benchmark/test/user_counters_thousands_test.cc
+++ /dev/null
@@ -1,161 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------ Thousands Customisation ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Thousands(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"t0_1000000DefaultBase",
-       bm::Counter(1000 * 1000, bm::Counter::kDefaults)},
-      {"t1_1000000Base1000", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1000)},
-      {"t2_1000000Base1024", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1024)},
-      {"t3_1048576Base1000", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1000)},
-      {"t4_1048576Base1024", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1024)},
-  });
-}
-BENCHMARK(BM_Counters_Thousands)->Repetitions(2);
-ADD_CASES(
-    TC_ConsoleOut,
-    {
-        {"^BM_Counters_Thousands/repeats:2 %console_report "
-         "t0_1000000DefaultBase=1000k "
-         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
-         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2 %console_report "
-         "t0_1000000DefaultBase=1000k "
-         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
-         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_mean %console_report "
-         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
-         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
-         "t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_median %console_report "
-         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
-         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
-         "t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_stddev %console_time_only_report [ "
-         "]*2 t0_1000000DefaultBase=0 t1_1000000Base1000=0 "
-         "t2_1000000Base1024=0 t3_1048576Base1000=0 t4_1048576Base1024=0$"},
-    });
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_mean\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_median\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_stddev\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t1_1000000Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t2_1000000Base1024\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t3_1048576Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t4_1048576Base1024\": 0\\.(0)*e\\+(0)*$", MR_Next},
-           {"}", MR_Next}});
-
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_Thousands/"
-      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
-      "0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
-      "0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2_mean\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
-      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2_median\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
-      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/repeats:2_stddev\",%csv_report,0,0,0,0,0$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckThousands(Results const& e) {
-  if (e.name != "BM_Counters_Thousands/repeats:2")
-    return;  // Do not check the aggregates!
-
-  // check that the values are within 0.01% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "t0_1000000DefaultBase", EQ, 1000 * 1000,
-                            0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t1_1000000Base1000", EQ, 1000 * 1000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t2_1000000Base1024", EQ, 1000 * 1000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t3_1048576Base1000", EQ, 1024 * 1024, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t4_1048576Base1024", EQ, 1024 * 1024, 0.0001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Thousands", &CheckThousands);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/third_party/google-benchmark/tools/compare.py b/third_party/google-benchmark/tools/compare.py
deleted file mode 100755
index 539ace6..0000000
--- a/third_party/google-benchmark/tools/compare.py
+++ /dev/null
@@ -1,408 +0,0 @@
-#!/usr/bin/env python
-
-import unittest
-"""
-compare.py - versatile benchmark output compare tool
-"""
-
-import argparse
-from argparse import ArgumentParser
-import sys
-import gbench
-from gbench import util, report
-from gbench.util import *
-
-
-def check_inputs(in1, in2, flags):
-    """
-    Perform checking on the user provided inputs and diagnose any abnormalities
-    """
-    in1_kind, in1_err = classify_input_file(in1)
-    in2_kind, in2_err = classify_input_file(in2)
-    output_file = find_benchmark_flag('--benchmark_out=', flags)
-    output_type = find_benchmark_flag('--benchmark_out_format=', flags)
-    if in1_kind == IT_Executable and in2_kind == IT_Executable and output_file:
-        print(("WARNING: '--benchmark_out=%s' will be passed to both "
-               "benchmarks causing it to be overwritten") % output_file)
-    if in1_kind == IT_JSON and in2_kind == IT_JSON and len(flags) > 0:
-        print("WARNING: passing optional flags has no effect since both "
-              "inputs are JSON")
-    if output_type is not None and output_type != 'json':
-        print(("ERROR: passing '--benchmark_out_format=%s' to 'compare.py`"
-               " is not supported.") % output_type)
-        sys.exit(1)
-
-
-def create_parser():
-    parser = ArgumentParser(
-        description='versatile benchmark output compare tool')
-
-    parser.add_argument(
-        '-a',
-        '--display_aggregates_only',
-        dest='display_aggregates_only',
-        action="store_true",
-        help="If there are repetitions, by default, we display everything - the"
-             " actual runs, and the aggregates computed. Sometimes, it is "
-             "desirable to only view the aggregates. E.g. when there are a lot "
-             "of repetitions. Do note that only the display is affected. "
-             "Internally, all the actual runs are still used, e.g. for U test.")
-
-    utest = parser.add_argument_group()
-    utest.add_argument(
-        '--no-utest',
-        dest='utest',
-        default=True,
-        action="store_false",
-        help="The tool can do a two-tailed Mann-Whitney U test with the null hypothesis that it is equally likely that a randomly selected value from one sample will be less than or greater than a randomly selected value from a second sample.\nWARNING: requires **LARGE** (no less than {}) number of repetitions to be meaningful!\nThe test is being done by default, if at least {} repetitions were done.\nThis option can disable the U Test.".format(report.UTEST_OPTIMAL_REPETITIONS, report.UTEST_MIN_REPETITIONS))
-    alpha_default = 0.05
-    utest.add_argument(
-        "--alpha",
-        dest='utest_alpha',
-        default=alpha_default,
-        type=float,
-        help=("significance level alpha. if the calculated p-value is below this value, then the result is said to be statistically significant and the null hypothesis is rejected.\n(default: %0.4f)") %
-        alpha_default)
-
-    subparsers = parser.add_subparsers(
-        help='This tool has multiple modes of operation:',
-        dest='mode')
-
-    parser_a = subparsers.add_parser(
-        'benchmarks',
-        help='The most simple use-case, compare all the output of these two benchmarks')
-    baseline = parser_a.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test_baseline',
-        metavar='test_baseline',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    contender = parser_a.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'test_contender',
-        metavar='test_contender',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    parser_a.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    parser_b = subparsers.add_parser(
-        'filters', help='Compare filter one with the filter two of benchmark')
-    baseline = parser_b.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test',
-        metavar='test',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    baseline.add_argument(
-        'filter_baseline',
-        metavar='filter_baseline',
-        type=str,
-        nargs=1,
-        help='The first filter, that will be used as baseline')
-    contender = parser_b.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'filter_contender',
-        metavar='filter_contender',
-        type=str,
-        nargs=1,
-        help='The second filter, that will be compared against the baseline')
-    parser_b.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    parser_c = subparsers.add_parser(
-        'benchmarksfiltered',
-        help='Compare filter one of first benchmark with filter two of the second benchmark')
-    baseline = parser_c.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test_baseline',
-        metavar='test_baseline',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    baseline.add_argument(
-        'filter_baseline',
-        metavar='filter_baseline',
-        type=str,
-        nargs=1,
-        help='The first filter, that will be used as baseline')
-    contender = parser_c.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'test_contender',
-        metavar='test_contender',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='The second benchmark executable or JSON output file, that will be compared against the baseline')
-    contender.add_argument(
-        'filter_contender',
-        metavar='filter_contender',
-        type=str,
-        nargs=1,
-        help='The second filter, that will be compared against the baseline')
-    parser_c.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    return parser
-
-
-def main():
-    # Parse the command line flags
-    parser = create_parser()
-    args, unknown_args = parser.parse_known_args()
-    if args.mode is None:
-        parser.print_help()
-        exit(1)
-    assert not unknown_args
-    benchmark_options = args.benchmark_options
-
-    if args.mode == 'benchmarks':
-        test_baseline = args.test_baseline[0].name
-        test_contender = args.test_contender[0].name
-        filter_baseline = ''
-        filter_contender = ''
-
-        # NOTE: if test_baseline == test_contender, you are analyzing the stdev
-
-        description = 'Comparing %s to %s' % (test_baseline, test_contender)
-    elif args.mode == 'filters':
-        test_baseline = args.test[0].name
-        test_contender = args.test[0].name
-        filter_baseline = args.filter_baseline[0]
-        filter_contender = args.filter_contender[0]
-
-        # NOTE: if filter_baseline == filter_contender, you are analyzing the
-        # stdev
-
-        description = 'Comparing %s to %s (from %s)' % (
-            filter_baseline, filter_contender, args.test[0].name)
-    elif args.mode == 'benchmarksfiltered':
-        test_baseline = args.test_baseline[0].name
-        test_contender = args.test_contender[0].name
-        filter_baseline = args.filter_baseline[0]
-        filter_contender = args.filter_contender[0]
-
-        # NOTE: if test_baseline == test_contender and
-        # filter_baseline == filter_contender, you are analyzing the stdev
-
-        description = 'Comparing %s (from %s) to %s (from %s)' % (
-            filter_baseline, test_baseline, filter_contender, test_contender)
-    else:
-        # should never happen
-        print("Unrecognized mode of operation: '%s'" % args.mode)
-        parser.print_help()
-        exit(1)
-
-    check_inputs(test_baseline, test_contender, benchmark_options)
-
-    if args.display_aggregates_only:
-        benchmark_options += ['--benchmark_display_aggregates_only=true']
-
-    options_baseline = []
-    options_contender = []
-
-    if filter_baseline and filter_contender:
-        options_baseline = ['--benchmark_filter=%s' % filter_baseline]
-        options_contender = ['--benchmark_filter=%s' % filter_contender]
-
-    # Run the benchmarks and report the results
-    json1 = json1_orig = gbench.util.run_or_load_benchmark(
-        test_baseline, benchmark_options + options_baseline)
-    json2 = json2_orig = gbench.util.run_or_load_benchmark(
-        test_contender, benchmark_options + options_contender)
-
-    # Now, filter the benchmarks so that the difference report can work
-    if filter_baseline and filter_contender:
-        replacement = '[%s vs. %s]' % (filter_baseline, filter_contender)
-        json1 = gbench.report.filter_benchmark(
-            json1_orig, filter_baseline, replacement)
-        json2 = gbench.report.filter_benchmark(
-            json2_orig, filter_contender, replacement)
-
-    # Diff and output
-    output_lines = gbench.report.generate_difference_report(
-        json1, json2, args.display_aggregates_only,
-        args.utest, args.utest_alpha)
-    print(description)
-    for ln in output_lines:
-        print(ln)
-
-
-class TestParser(unittest.TestCase):
-    def setUp(self):
-        self.parser = create_parser()
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'gbench',
-            'Inputs')
-        self.testInput0 = os.path.join(testInputs, 'test1_run1.json')
-        self.testInput1 = os.path.join(testInputs, 'test1_run2.json')
-
-    def test_benchmarks_basic(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_without_utest(self):
-        parsed = self.parser.parse_args(
-            ['--no-utest', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertFalse(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.05)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_display_aggregates_only(self):
-        parsed = self.parser.parse_args(
-            ['-a', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertTrue(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_with_utest_alpha(self):
-        parsed = self.parser.parse_args(
-            ['--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.314)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_without_utest_with_utest_alpha(self):
-        parsed = self.parser.parse_args(
-            ['--no-utest', '--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertFalse(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.314)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1, 'd'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.benchmark_options, ['d'])
-
-    def test_benchmarks_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1, '--', 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.benchmark_options, ['e'])
-
-    def test_filters_basic(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_filters_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd', 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertEqual(parsed.benchmark_options, ['e'])
-
-    def test_filters_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd', '--', 'f'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertEqual(parsed.benchmark_options, ['f'])
-
-    def test_benchmarksfiltered_basic(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarksfiltered_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', 'f'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertEqual(parsed.benchmark_options[0], 'f')
-
-    def test_benchmarksfiltered_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', '--', 'g'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertEqual(parsed.benchmark_options[0], 'g')
-
-
-if __name__ == '__main__':
-    # unittest.main()
-    main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/third_party/google-benchmark/tools/gbench/Inputs/test1_run1.json b/third_party/google-benchmark/tools/gbench/Inputs/test1_run1.json
deleted file mode 100644
index d7ec6a9..0000000
--- a/third_party/google-benchmark/tools/gbench/Inputs/test1_run1.json
+++ /dev/null
@@ -1,102 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SameTimes",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xFaster",
-      "iterations": 1000,
-      "real_time": 50,
-      "cpu_time": 50,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xSlower",
-      "iterations": 1000,
-      "real_time": 50,
-      "cpu_time": 50,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xFaster",
-      "iterations": 1000,
-      "real_time": 10000,
-      "cpu_time": 10000,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentCPUToTime",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_ThirdFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_BadTimeUnit",
-      "iterations": 1000,
-      "real_time": 0.4,
-      "cpu_time": 0.5,
-      "time_unit": "s"
-    },
-    {
-      "name": "BM_DifferentTimeUnit",
-      "iterations": 1,
-      "real_time": 1,
-      "cpu_time": 1,
-      "time_unit": "s"
-    }
-  ]
-}
diff --git a/third_party/google-benchmark/tools/gbench/Inputs/test1_run2.json b/third_party/google-benchmark/tools/gbench/Inputs/test1_run2.json
deleted file mode 100644
index 59a5ffa..0000000
--- a/third_party/google-benchmark/tools/gbench/Inputs/test1_run2.json
+++ /dev/null
@@ -1,102 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SameTimes",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xFaster",
-      "iterations": 1000,
-      "real_time": 25,
-      "cpu_time": 25,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xSlower",
-      "iterations": 20833333,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentFaster",
-      "iterations": 1000,
-      "real_time": 98.9999999,
-      "cpu_time": 98.9999999,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentSlower",
-      "iterations": 1000,
-      "real_time": 100.9999999,
-      "cpu_time": 100.9999999,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentFaster",
-      "iterations": 1000,
-      "real_time": 90,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentSlower",
-      "iterations": 1000,
-      "real_time": 110,
-      "cpu_time": 110,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xSlower",
-      "iterations": 1000,
-      "real_time": 1.0000e+04,
-      "cpu_time": 1.0000e+04,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentCPUToTime",
-      "iterations": 1000,
-      "real_time": 110,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_ThirdFaster",
-      "iterations": 1000,
-      "real_time": 66.665,
-      "cpu_time": 66.664,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_BadTimeUnit",
-      "iterations": 1000,
-      "real_time": 0.04,
-      "cpu_time": 0.6,
-      "time_unit": "s"
-    },
-    {
-      "name": "BM_DifferentTimeUnit",
-      "iterations": 1,
-      "real_time": 1,
-      "cpu_time": 1,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/third_party/google-benchmark/tools/gbench/Inputs/test2_run.json b/third_party/google-benchmark/tools/gbench/Inputs/test2_run.json
deleted file mode 100644
index 15bc698..0000000
--- a/third_party/google-benchmark/tools/gbench/Inputs/test2_run.json
+++ /dev/null
@@ -1,81 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_Hi",
-      "iterations": 1234,
-      "real_time": 42,
-      "cpu_time": 24,
-      "time_unit": "ms"
-    },
-    {
-      "name": "BM_Zero",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Zero/4",
-      "iterations": 4000,
-      "real_time": 40,
-      "cpu_time": 40,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_Zero",
-      "iterations": 2000,
-      "real_time": 20,
-      "cpu_time": 20,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_Zero/3",
-      "iterations": 3000,
-      "real_time": 30,
-      "cpu_time": 30,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_One",
-      "iterations": 5000,
-      "real_time": 5,
-      "cpu_time": 5,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_One/4",
-      "iterations": 2000,
-      "real_time": 20,
-      "cpu_time": 20,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_One",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_One/3",
-      "iterations": 1500,
-      "real_time": 15,
-      "cpu_time": 15,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Bye",
-      "iterations": 5321,
-      "real_time": 11,
-      "cpu_time": 63,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/third_party/google-benchmark/tools/gbench/Inputs/test3_run0.json b/third_party/google-benchmark/tools/gbench/Inputs/test3_run0.json
deleted file mode 100644
index 49f8b06..0000000
--- a/third_party/google-benchmark/tools/gbench/Inputs/test3_run0.json
+++ /dev/null
@@ -1,65 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_One",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 86,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 80,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 77,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 80,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 82,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/third_party/google-benchmark/tools/gbench/Inputs/test3_run1.json b/third_party/google-benchmark/tools/gbench/Inputs/test3_run1.json
deleted file mode 100644
index acc5ba1..0000000
--- a/third_party/google-benchmark/tools/gbench/Inputs/test3_run1.json
+++ /dev/null
@@ -1,65 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_One",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 110,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 89,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 7,
-      "cpu_time": 72,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 7,
-      "cpu_time": 75,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 762,
-      "real_time": 4.54,
-      "cpu_time": 66.6,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 800,
-      "cpu_time": 1,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1200,
-      "real_time": 5,
-      "cpu_time": 53,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/third_party/google-benchmark/tools/gbench/__init__.py b/third_party/google-benchmark/tools/gbench/__init__.py
deleted file mode 100644
index fce1a1a..0000000
--- a/third_party/google-benchmark/tools/gbench/__init__.py
+++ /dev/null
@@ -1,8 +0,0 @@
-"""Google Benchmark tooling"""
-
-__author__ = 'Eric Fiselier'
-__email__ = 'eric@efcs.ca'
-__versioninfo__ = (0, 5, 0)
-__version__ = '.'.join(str(v) for v in __versioninfo__) + 'dev'
-
-__all__ = []
diff --git a/third_party/google-benchmark/tools/gbench/report.py b/third_party/google-benchmark/tools/gbench/report.py
deleted file mode 100644
index 5085b93..0000000
--- a/third_party/google-benchmark/tools/gbench/report.py
+++ /dev/null
@@ -1,522 +0,0 @@
-import unittest
-"""report.py - Utilities for reporting statistics about benchmark results
-"""
-import os
-import re
-import copy
-
-from scipy.stats import mannwhitneyu
-
-
-class BenchmarkColor(object):
-    def __init__(self, name, code):
-        self.name = name
-        self.code = code
-
-    def __repr__(self):
-        return '%s%r' % (self.__class__.__name__,
-                         (self.name, self.code))
-
-    def __format__(self, format):
-        return self.code
-
-
-# Benchmark Colors Enumeration
-BC_NONE = BenchmarkColor('NONE', '')
-BC_MAGENTA = BenchmarkColor('MAGENTA', '\033[95m')
-BC_CYAN = BenchmarkColor('CYAN', '\033[96m')
-BC_OKBLUE = BenchmarkColor('OKBLUE', '\033[94m')
-BC_OKGREEN = BenchmarkColor('OKGREEN', '\033[32m')
-BC_HEADER = BenchmarkColor('HEADER', '\033[92m')
-BC_WARNING = BenchmarkColor('WARNING', '\033[93m')
-BC_WHITE = BenchmarkColor('WHITE', '\033[97m')
-BC_FAIL = BenchmarkColor('FAIL', '\033[91m')
-BC_ENDC = BenchmarkColor('ENDC', '\033[0m')
-BC_BOLD = BenchmarkColor('BOLD', '\033[1m')
-BC_UNDERLINE = BenchmarkColor('UNDERLINE', '\033[4m')
-
-UTEST_MIN_REPETITIONS = 2
-UTEST_OPTIMAL_REPETITIONS = 9  # Lowest reasonable number, More is better.
-UTEST_COL_NAME = "_pvalue"
-
-
-def color_format(use_color, fmt_str, *args, **kwargs):
-    """
-    Return the result of 'fmt_str.format(*args, **kwargs)' after transforming
-    'args' and 'kwargs' according to the value of 'use_color'. If 'use_color'
-    is False then all color codes in 'args' and 'kwargs' are replaced with
-    the empty string.
-    """
-    assert use_color is True or use_color is False
-    if not use_color:
-        args = [arg if not isinstance(arg, BenchmarkColor) else BC_NONE
-                for arg in args]
-        kwargs = {key: arg if not isinstance(arg, BenchmarkColor) else BC_NONE
-                  for key, arg in kwargs.items()}
-    return fmt_str.format(*args, **kwargs)
-
-
-def find_longest_name(benchmark_list):
-    """
-    Return the length of the longest benchmark name in a given list of
-    benchmark JSON objects
-    """
-    longest_name = 1
-    for bc in benchmark_list:
-        if len(bc['name']) > longest_name:
-            longest_name = len(bc['name'])
-    return longest_name
-
-
-def calculate_change(old_val, new_val):
-    """
-    Return a float representing the decimal change between old_val and new_val.
-    """
-    if old_val == 0 and new_val == 0:
-        return 0.0
-    if old_val == 0:
-        return float(new_val - old_val) / (float(old_val + new_val) / 2)
-    return float(new_val - old_val) / abs(old_val)
-
-
-def filter_benchmark(json_orig, family, replacement=""):
-    """
-    Apply a filter to the json, and only leave the 'family' of benchmarks.
-    """
-    regex = re.compile(family)
-    filtered = {}
-    filtered['benchmarks'] = []
-    for be in json_orig['benchmarks']:
-        if not regex.search(be['name']):
-            continue
-        filteredbench = copy.deepcopy(be)  # Do NOT modify the old name!
-        filteredbench['name'] = regex.sub(replacement, filteredbench['name'])
-        filtered['benchmarks'].append(filteredbench)
-    return filtered
-
-
-def get_unique_benchmark_names(json):
-    """
-    While *keeping* the order, give all the unique 'names' used for benchmarks.
-    """
-    seen = set()
-    uniqued = [x['name'] for x in json['benchmarks']
-               if x['name'] not in seen and
-               (seen.add(x['name']) or True)]
-    return uniqued
-
-
-def intersect(list1, list2):
-    """
-    Given two lists, get a new list consisting of the elements only contained
-    in *both of the input lists*, while preserving the ordering.
-    """
-    return [x for x in list1 if x in list2]
-
-
-def partition_benchmarks(json1, json2):
-    """
-    While preserving the ordering, find benchmarks with the same names in
-    both of the inputs, and group them.
-    (i.e. partition/filter into groups with common name)
-    """
-    json1_unique_names = get_unique_benchmark_names(json1)
-    json2_unique_names = get_unique_benchmark_names(json2)
-    names = intersect(json1_unique_names, json2_unique_names)
-    partitions = []
-    for name in names:
-        # Pick the time unit from the first entry of the lhs benchmark.
-        time_unit = (x['time_unit']
-                     for x in json1['benchmarks'] if x['name'] == name).next()
-        # Filter by name and time unit.
-        lhs = [x for x in json1['benchmarks'] if x['name'] == name and
-               x['time_unit'] == time_unit]
-        rhs = [x for x in json2['benchmarks'] if x['name'] == name and
-               x['time_unit'] == time_unit]
-        partitions.append([lhs, rhs])
-    return partitions
-
-
-def extract_field(partition, field_name):
-    # The count of elements may be different. We want *all* of them.
-    lhs = [x[field_name] for x in partition[0]]
-    rhs = [x[field_name] for x in partition[1]]
-    return [lhs, rhs]
-
-
-def print_utest(partition, utest_alpha, first_col_width, use_color=True):
-    timings_time = extract_field(partition, 'real_time')
-    timings_cpu = extract_field(partition, 'cpu_time')
-
-    min_rep_cnt = min(len(timings_time[0]),
-                      len(timings_time[1]),
-                      len(timings_cpu[0]),
-                      len(timings_cpu[1]))
-
-    # Does *everything* has at least UTEST_MIN_REPETITIONS repetitions?
-    if min_rep_cnt < UTEST_MIN_REPETITIONS:
-        return []
-
-    def get_utest_color(pval):
-        return BC_FAIL if pval >= utest_alpha else BC_OKGREEN
-
-    time_pvalue = mannwhitneyu(
-        timings_time[0], timings_time[1], alternative='two-sided').pvalue
-    cpu_pvalue = mannwhitneyu(
-        timings_cpu[0], timings_cpu[1], alternative='two-sided').pvalue
-
-    dsc = "U Test, Repetitions: {} vs {}".format(
-        len(timings_cpu[0]), len(timings_cpu[1]))
-    dsc_color = BC_OKGREEN
-
-    if min_rep_cnt < UTEST_OPTIMAL_REPETITIONS:
-        dsc_color = BC_WARNING
-        dsc += ". WARNING: Results unreliable! {}+ repetitions recommended.".format(
-            UTEST_OPTIMAL_REPETITIONS)
-
-    special_str = "{}{:<{}s}{endc}{}{:16.4f}{endc}{}{:16.4f}{endc}{}      {}"
-
-    last_name = partition[0][0]['name']
-    return [color_format(use_color,
-                         special_str,
-                         BC_HEADER,
-                         "{}{}".format(last_name, UTEST_COL_NAME),
-                         first_col_width,
-                         get_utest_color(time_pvalue), time_pvalue,
-                         get_utest_color(cpu_pvalue), cpu_pvalue,
-                         dsc_color, dsc,
-                         endc=BC_ENDC)]
-
-
-def generate_difference_report(
-        json1,
-        json2,
-        display_aggregates_only=False,
-        utest=False,
-        utest_alpha=0.05,
-        use_color=True):
-    """
-    Calculate and report the difference between each test of two benchmarks
-    runs specified as 'json1' and 'json2'.
-    """
-    assert utest is True or utest is False
-    first_col_width = find_longest_name(json1['benchmarks'])
-
-    def find_test(name):
-        for b in json2['benchmarks']:
-            if b['name'] == name:
-                return b
-        return None
-
-    first_col_width = max(
-        first_col_width,
-        len('Benchmark'))
-    first_col_width += len(UTEST_COL_NAME)
-    first_line = "{:<{}s}Time             CPU      Time Old      Time New       CPU Old       CPU New".format(
-        'Benchmark', 12 + first_col_width)
-    output_strs = [first_line, '-' * len(first_line)]
-
-    partitions = partition_benchmarks(json1, json2)
-    for partition in partitions:
-        # Careful, we may have different repetition count.
-        for i in range(min(len(partition[0]), len(partition[1]))):
-            bn = partition[0][i]
-            other_bench = partition[1][i]
-
-            # *If* we were asked to only display aggregates,
-            # and if it is non-aggregate, then skip it.
-            if display_aggregates_only and 'run_type' in bn and 'run_type' in other_bench:
-                assert bn['run_type'] == other_bench['run_type']
-                if bn['run_type'] != 'aggregate':
-                    continue
-
-            fmt_str = "{}{:<{}s}{endc}{}{:+16.4f}{endc}{}{:+16.4f}{endc}{:14.0f}{:14.0f}{endc}{:14.0f}{:14.0f}"
-
-            def get_color(res):
-                if res > 0.05:
-                    return BC_FAIL
-                elif res > -0.07:
-                    return BC_WHITE
-                else:
-                    return BC_CYAN
-
-            tres = calculate_change(bn['real_time'], other_bench['real_time'])
-            cpures = calculate_change(bn['cpu_time'], other_bench['cpu_time'])
-            output_strs += [color_format(use_color,
-                                         fmt_str,
-                                         BC_HEADER,
-                                         bn['name'],
-                                         first_col_width,
-                                         get_color(tres),
-                                         tres,
-                                         get_color(cpures),
-                                         cpures,
-                                         bn['real_time'],
-                                         other_bench['real_time'],
-                                         bn['cpu_time'],
-                                         other_bench['cpu_time'],
-                                         endc=BC_ENDC)]
-
-        # After processing the whole partition, if requested, do the U test.
-        if utest:
-            output_strs += print_utest(partition,
-                                       utest_alpha=utest_alpha,
-                                       first_col_width=first_col_width,
-                                       use_color=use_color)
-
-    return output_strs
-
-
-###############################################################################
-# Unit tests
-
-
-class TestGetUniqueBenchmarkNames(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput = os.path.join(testInputs, 'test3_run0.json')
-        with open(testOutput, 'r') as f:
-            json = json.load(f)
-        return json
-
-    def test_basic(self):
-        expect_lines = [
-            'BM_One',
-            'BM_Two',
-            'short',  # These two are not sorted
-            'medium',  # These two are not sorted
-        ]
-        json = self.load_results()
-        output_lines = get_unique_benchmark_names(json)
-        print("\n")
-        print("\n".join(output_lines))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            self.assertEqual(expect_lines[i], output_lines[i])
-
-
-class TestReportDifference(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput1 = os.path.join(testInputs, 'test1_run1.json')
-        testOutput2 = os.path.join(testInputs, 'test1_run2.json')
-        with open(testOutput1, 'r') as f:
-            json1 = json.load(f)
-        with open(testOutput2, 'r') as f:
-            json2 = json.load(f)
-        return json1, json2
-
-    def test_basic(self):
-        expect_lines = [
-            ['BM_SameTimes', '+0.0000', '+0.0000', '10', '10', '10', '10'],
-            ['BM_2xFaster', '-0.5000', '-0.5000', '50', '25', '50', '25'],
-            ['BM_2xSlower', '+1.0000', '+1.0000', '50', '100', '50', '100'],
-            ['BM_1PercentFaster', '-0.0100', '-0.0100', '100', '99', '100', '99'],
-            ['BM_1PercentSlower', '+0.0100', '+0.0100', '100', '101', '100', '101'],
-            ['BM_10PercentFaster', '-0.1000', '-0.1000', '100', '90', '100', '90'],
-            ['BM_10PercentSlower', '+0.1000', '+0.1000', '100', '110', '100', '110'],
-            ['BM_100xSlower', '+99.0000', '+99.0000',
-                '100', '10000', '100', '10000'],
-            ['BM_100xFaster', '-0.9900', '-0.9900',
-                '10000', '100', '10000', '100'],
-            ['BM_10PercentCPUToTime', '+0.1000',
-                '-0.1000', '100', '110', '100', '90'],
-            ['BM_ThirdFaster', '-0.3333', '-0.3334', '100', '67', '100', '67'],
-            ['BM_BadTimeUnit', '-0.9000', '+0.2000', '0', '0', '0', '1'],
-        ]
-        json1, json2 = self.load_results()
-        output_lines_with_header = generate_difference_report(
-            json1, json2, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(len(parts), 7)
-            self.assertEqual(expect_lines[i], parts)
-
-
-class TestReportDifferenceBetweenFamilies(unittest.TestCase):
-    def load_result(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput = os.path.join(testInputs, 'test2_run.json')
-        with open(testOutput, 'r') as f:
-            json = json.load(f)
-        return json
-
-    def test_basic(self):
-        expect_lines = [
-            ['.', '-0.5000', '-0.5000', '10', '5', '10', '5'],
-            ['./4', '-0.5000', '-0.5000', '40', '20', '40', '20'],
-            ['Prefix/.', '-0.5000', '-0.5000', '20', '10', '20', '10'],
-            ['Prefix/./3', '-0.5000', '-0.5000', '30', '15', '30', '15'],
-        ]
-        json = self.load_result()
-        json1 = filter_benchmark(json, "BM_Z.ro", ".")
-        json2 = filter_benchmark(json, "BM_O.e", ".")
-        output_lines_with_header = generate_difference_report(
-            json1, json2, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(len(parts), 7)
-            self.assertEqual(expect_lines[i], parts)
-
-
-class TestReportDifferenceWithUTest(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput1 = os.path.join(testInputs, 'test3_run0.json')
-        testOutput2 = os.path.join(testInputs, 'test3_run1.json')
-        with open(testOutput1, 'r') as f:
-            json1 = json.load(f)
-        with open(testOutput2, 'r') as f:
-            json2 = json.load(f)
-        return json1, json2
-
-    def test_utest(self):
-        expect_lines = []
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
-            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
-            ['BM_Two_pvalue',
-             '0.6985',
-             '0.6985',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.1489',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['medium', '-0.3750', '-0.3375', '8', '5', '80', '53'],
-        ]
-        json1, json2 = self.load_results()
-        output_lines_with_header = generate_difference_report(
-            json1, json2, utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-
-class TestReportDifferenceWithUTestWhileDisplayingAggregatesOnly(
-        unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput1 = os.path.join(testInputs, 'test3_run0.json')
-        testOutput2 = os.path.join(testInputs, 'test3_run1.json')
-        with open(testOutput1, 'r') as f:
-            json1 = json.load(f)
-        with open(testOutput2, 'r') as f:
-            json2 = json.load(f)
-        return json1, json2
-
-    def test_utest(self):
-        expect_lines = []
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
-            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
-            ['BM_Two_pvalue',
-             '0.6985',
-             '0.6985',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.1489',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-        ]
-        json1, json2 = self.load_results()
-        output_lines_with_header = generate_difference_report(
-            json1, json2, display_aggregates_only=True,
-            utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-
-if __name__ == '__main__':
-    unittest.main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/third_party/google-benchmark/tools/gbench/util.py b/third_party/google-benchmark/tools/gbench/util.py
deleted file mode 100644
index 1f8e8e2..0000000
--- a/third_party/google-benchmark/tools/gbench/util.py
+++ /dev/null
@@ -1,164 +0,0 @@
-"""util.py - General utilities for running, loading, and processing benchmarks
-"""
-import json
-import os
-import tempfile
-import subprocess
-import sys
-
-# Input file type enumeration
-IT_Invalid = 0
-IT_JSON = 1
-IT_Executable = 2
-
-_num_magic_bytes = 2 if sys.platform.startswith('win') else 4
-
-
-def is_executable_file(filename):
-    """
-    Return 'True' if 'filename' names a valid file which is likely
-    an executable. A file is considered an executable if it starts with the
-    magic bytes for a EXE, Mach O, or ELF file.
-    """
-    if not os.path.isfile(filename):
-        return False
-    with open(filename, mode='rb') as f:
-        magic_bytes = f.read(_num_magic_bytes)
-    if sys.platform == 'darwin':
-        return magic_bytes in [
-            b'\xfe\xed\xfa\xce',  # MH_MAGIC
-            b'\xce\xfa\xed\xfe',  # MH_CIGAM
-            b'\xfe\xed\xfa\xcf',  # MH_MAGIC_64
-            b'\xcf\xfa\xed\xfe',  # MH_CIGAM_64
-            b'\xca\xfe\xba\xbe',  # FAT_MAGIC
-            b'\xbe\xba\xfe\xca'   # FAT_CIGAM
-        ]
-    elif sys.platform.startswith('win'):
-        return magic_bytes == b'MZ'
-    else:
-        return magic_bytes == b'\x7FELF'
-
-
-def is_json_file(filename):
-    """
-    Returns 'True' if 'filename' names a valid JSON output file.
-    'False' otherwise.
-    """
-    try:
-        with open(filename, 'r') as f:
-            json.load(f)
-        return True
-    except BaseException:
-        pass
-    return False
-
-
-def classify_input_file(filename):
-    """
-    Return a tuple (type, msg) where 'type' specifies the classified type
-    of 'filename'. If 'type' is 'IT_Invalid' then 'msg' is a human readable
-    string represeting the error.
-    """
-    ftype = IT_Invalid
-    err_msg = None
-    if not os.path.exists(filename):
-        err_msg = "'%s' does not exist" % filename
-    elif not os.path.isfile(filename):
-        err_msg = "'%s' does not name a file" % filename
-    elif is_executable_file(filename):
-        ftype = IT_Executable
-    elif is_json_file(filename):
-        ftype = IT_JSON
-    else:
-        err_msg = "'%s' does not name a valid benchmark executable or JSON file" % filename
-    return ftype, err_msg
-
-
-def check_input_file(filename):
-    """
-    Classify the file named by 'filename' and return the classification.
-    If the file is classified as 'IT_Invalid' print an error message and exit
-    the program.
-    """
-    ftype, msg = classify_input_file(filename)
-    if ftype == IT_Invalid:
-        print("Invalid input file: %s" % msg)
-        sys.exit(1)
-    return ftype
-
-
-def find_benchmark_flag(prefix, benchmark_flags):
-    """
-    Search the specified list of flags for a flag matching `<prefix><arg>` and
-    if it is found return the arg it specifies. If specified more than once the
-    last value is returned. If the flag is not found None is returned.
-    """
-    assert prefix.startswith('--') and prefix.endswith('=')
-    result = None
-    for f in benchmark_flags:
-        if f.startswith(prefix):
-            result = f[len(prefix):]
-    return result
-
-
-def remove_benchmark_flags(prefix, benchmark_flags):
-    """
-    Return a new list containing the specified benchmark_flags except those
-    with the specified prefix.
-    """
-    assert prefix.startswith('--') and prefix.endswith('=')
-    return [f for f in benchmark_flags if not f.startswith(prefix)]
-
-
-def load_benchmark_results(fname):
-    """
-    Read benchmark output from a file and return the JSON object.
-    REQUIRES: 'fname' names a file containing JSON benchmark output.
-    """
-    with open(fname, 'r') as f:
-        return json.load(f)
-
-
-def run_benchmark(exe_name, benchmark_flags):
-    """
-    Run a benchmark specified by 'exe_name' with the specified
-    'benchmark_flags'. The benchmark is run directly as a subprocess to preserve
-    real time console output.
-    RETURNS: A JSON object representing the benchmark output
-    """
-    output_name = find_benchmark_flag('--benchmark_out=',
-                                      benchmark_flags)
-    is_temp_output = False
-    if output_name is None:
-        is_temp_output = True
-        thandle, output_name = tempfile.mkstemp()
-        os.close(thandle)
-        benchmark_flags = list(benchmark_flags) + \
-            ['--benchmark_out=%s' % output_name]
-
-    cmd = [exe_name] + benchmark_flags
-    print("RUNNING: %s" % ' '.join(cmd))
-    exitCode = subprocess.call(cmd)
-    if exitCode != 0:
-        print('TEST FAILED...')
-        sys.exit(exitCode)
-    json_res = load_benchmark_results(output_name)
-    if is_temp_output:
-        os.unlink(output_name)
-    return json_res
-
-
-def run_or_load_benchmark(filename, benchmark_flags):
-    """
-    Get the results for a specified benchmark. If 'filename' specifies
-    an executable benchmark then the results are generated by running the
-    benchmark. Otherwise 'filename' must name a valid JSON output file,
-    which is loaded and the result returned.
-    """
-    ftype = check_input_file(filename)
-    if ftype == IT_JSON:
-        return load_benchmark_results(filename)
-    elif ftype == IT_Executable:
-        return run_benchmark(filename, benchmark_flags)
-    else:
-        assert False  # This branch is unreachable
diff --git a/third_party/google-benchmark/tools/strip_asm.py b/third_party/google-benchmark/tools/strip_asm.py
deleted file mode 100755
index 9030550..0000000
--- a/third_party/google-benchmark/tools/strip_asm.py
+++ /dev/null
@@ -1,151 +0,0 @@
-#!/usr/bin/env python
-
-"""
-strip_asm.py - Cleanup ASM output for the specified file
-"""
-
-from argparse import ArgumentParser
-import sys
-import os
-import re
-
-def find_used_labels(asm):
-    found = set()
-    label_re = re.compile("\s*j[a-z]+\s+\.L([a-zA-Z0-9][a-zA-Z0-9_]*)")
-    for l in asm.splitlines():
-        m = label_re.match(l)
-        if m:
-            found.add('.L%s' % m.group(1))
-    return found
-
-
-def normalize_labels(asm):
-    decls = set()
-    label_decl = re.compile("^[.]{0,1}L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
-    for l in asm.splitlines():
-        m = label_decl.match(l)
-        if m:
-            decls.add(m.group(0))
-    if len(decls) == 0:
-        return asm
-    needs_dot = next(iter(decls))[0] != '.'
-    if not needs_dot:
-        return asm
-    for ld in decls:
-        asm = re.sub("(^|\s+)" + ld + "(?=:|\s)", '\\1.' + ld, asm)
-    return asm
-
-
-def transform_labels(asm):
-    asm = normalize_labels(asm)
-    used_decls = find_used_labels(asm)
-    new_asm = ''
-    label_decl = re.compile("^\.L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
-    for l in asm.splitlines():
-        m = label_decl.match(l)
-        if not m or m.group(0) in used_decls:
-            new_asm += l
-            new_asm += '\n'
-    return new_asm
-
-
-def is_identifier(tk):
-    if len(tk) == 0:
-        return False
-    first = tk[0]
-    if not first.isalpha() and first != '_':
-        return False
-    for i in range(1, len(tk)):
-        c = tk[i]
-        if not c.isalnum() and c != '_':
-            return False
-    return True
-
-def process_identifiers(l):
-    """
-    process_identifiers - process all identifiers and modify them to have
-    consistent names across all platforms; specifically across ELF and MachO.
-    For example, MachO inserts an additional understore at the beginning of
-    names. This function removes that.
-    """
-    parts = re.split(r'([a-zA-Z0-9_]+)', l)
-    new_line = ''
-    for tk in parts:
-        if is_identifier(tk):
-            if tk.startswith('__Z'):
-                tk = tk[1:]
-            elif tk.startswith('_') and len(tk) > 1 and \
-                    tk[1].isalpha() and tk[1] != 'Z':
-                tk = tk[1:]
-        new_line += tk
-    return new_line
-
-
-def process_asm(asm):
-    """
-    Strip the ASM of unwanted directives and lines
-    """
-    new_contents = ''
-    asm = transform_labels(asm)
-
-    # TODO: Add more things we want to remove
-    discard_regexes = [
-        re.compile("\s+\..*$"), # directive
-        re.compile("\s*#(NO_APP|APP)$"), #inline ASM
-        re.compile("\s*#.*$"), # comment line
-        re.compile("\s*\.globa?l\s*([.a-zA-Z_][a-zA-Z0-9$_.]*)"), #global directive
-        re.compile("\s*\.(string|asciz|ascii|[1248]?byte|short|word|long|quad|value|zero)"),
-    ]
-    keep_regexes = [
-
-    ]
-    fn_label_def = re.compile("^[a-zA-Z_][a-zA-Z0-9_.]*:")
-    for l in asm.splitlines():
-        # Remove Mach-O attribute
-        l = l.replace('@GOTPCREL', '')
-        add_line = True
-        for reg in discard_regexes:
-            if reg.match(l) is not None:
-                add_line = False
-                break
-        for reg in keep_regexes:
-            if reg.match(l) is not None:
-                add_line = True
-                break
-        if add_line:
-            if fn_label_def.match(l) and len(new_contents) != 0:
-                new_contents += '\n'
-            l = process_identifiers(l)
-            new_contents += l
-            new_contents += '\n'
-    return new_contents
-
-def main():
-    parser = ArgumentParser(
-        description='generate a stripped assembly file')
-    parser.add_argument(
-        'input', metavar='input', type=str, nargs=1,
-        help='An input assembly file')
-    parser.add_argument(
-        'out', metavar='output', type=str, nargs=1,
-        help='The output file')
-    args, unknown_args = parser.parse_known_args()
-    input = args.input[0]
-    output = args.out[0]
-    if not os.path.isfile(input):
-        print(("ERROR: input file '%s' does not exist") % input)
-        sys.exit(1)
-    contents = None
-    with open(input, 'r') as f:
-        contents = f.read()
-    new_contents = process_asm(contents)
-    with open(output, 'w') as f:
-        f.write(new_contents)
-
-
-if __name__ == '__main__':
-    main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/third_party/googletest/BUILD.bazel b/third_party/googletest/BUILD.bazel
index ccc2435..e69de29 100644
--- a/third_party/googletest/BUILD.bazel
+++ b/third_party/googletest/BUILD.bazel
@@ -1,199 +0,0 @@
-# Copyright 2017 Google Inc.
-# All Rights Reserved.
-#
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-#   Bazel Build for Google C++ Testing Framework(Google Test)
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-
-package(default_visibility = ["//visibility:public"])
-
-licenses(["notice"])
-
-exports_files(["LICENSE"])
-
-config_setting(
-    name = "windows",
-    constraint_values = ["@platforms//os:windows"],
-)
-
-config_setting(
-    name = "msvc_compiler",
-    flag_values = {
-        "@bazel_tools//tools/cpp:compiler": "msvc-cl",
-    },
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "has_absl",
-    values = {"define": "absl=1"},
-)
-
-config_setting(
-    name = "ios",
-    values = {"apple_platform_type": "ios"},
-    visibility = [":__subpackages__"],
-)
-
-# Library that defines the FRIEND_TEST macro.
-cc_library(
-    name = "gtest_prod",
-    hdrs = ["googletest/include/gtest/gtest_prod.h"],
-    includes = ["googletest/include"],
-)
-
-# Google Test including Google Mock
-cc_library(
-    name = "gtest",
-    srcs = glob(
-        include = [
-            "googletest/src/*.cc",
-            "googletest/src/*.h",
-            "googletest/include/gtest/**/*.h",
-            "googlemock/src/*.cc",
-            "googlemock/include/gmock/**/*.h",
-        ],
-        exclude = [
-            "googletest/src/gtest-all.cc",
-            "googletest/src/gtest_main.cc",
-            "googlemock/src/gmock-all.cc",
-            "googlemock/src/gmock_main.cc",
-        ],
-    ),
-    hdrs = glob([
-        "googletest/include/gtest/*.h",
-        "googlemock/include/gmock/*.h",
-    ]),
-    copts = select({
-        ":ios": [
-            "-xobjective-c++",
-        ],
-        ":windows": [],
-        "//conditions:default": [],
-    }),
-    defines = select({
-        ":has_absl": ["GTEST_HAS_ABSL=1"],
-        "//conditions:default": [],
-    }),
-    features = select({
-        ":windows": ["windows_export_all_symbols"],
-        "//conditions:default": [],
-    }),
-    includes = [
-        "googlemock",
-        "googlemock/include",
-        "googletest",
-        "googletest/include",
-    ],
-    linkopts = select({
-        ":windows": [],
-        "//conditions:default": [],
-    }),
-    deps = select({
-        ":has_absl": [
-            "@com_google_absl//absl/debugging:failure_signal_handler",
-            "@com_google_absl//absl/debugging:stacktrace",
-            "@com_google_absl//absl/debugging:symbolize",
-            "@com_google_absl//absl/strings",
-            "@com_google_absl//absl/types:any",
-            "@com_google_absl//absl/types:optional",
-            "@com_google_absl//absl/types:variant",
-        ],
-        "//conditions:default": [],
-    }),
-)
-
-cc_library(
-    name = "gtest_main",
-    srcs = ["googlemock/src/gmock_main.cc"],
-    features = select({
-        ":windows": ["windows_export_all_symbols"],
-        "//conditions:default": [],
-    }),
-    deps = [":gtest"],
-)
-
-# The following rules build samples of how to use gTest.
-cc_library(
-    name = "gtest_sample_lib",
-    srcs = [
-        "googletest/samples/sample1.cc",
-        "googletest/samples/sample2.cc",
-        "googletest/samples/sample4.cc",
-    ],
-    hdrs = [
-        "googletest/samples/prime_tables.h",
-        "googletest/samples/sample1.h",
-        "googletest/samples/sample2.h",
-        "googletest/samples/sample3-inl.h",
-        "googletest/samples/sample4.h",
-    ],
-    features = select({
-        ":windows": ["windows_export_all_symbols"],
-        "//conditions:default": [],
-    }),
-)
-
-cc_test(
-    name = "gtest_samples",
-    size = "small",
-    # All Samples except:
-    #   sample9 (main)
-    #   sample10 (main and takes a command line option and needs to be separate)
-    srcs = [
-        "googletest/samples/sample1_unittest.cc",
-        "googletest/samples/sample2_unittest.cc",
-        "googletest/samples/sample3_unittest.cc",
-        "googletest/samples/sample4_unittest.cc",
-        "googletest/samples/sample5_unittest.cc",
-        "googletest/samples/sample6_unittest.cc",
-        "googletest/samples/sample7_unittest.cc",
-        "googletest/samples/sample8_unittest.cc",
-    ],
-    linkstatic = 0,
-    deps = [
-        "gtest_sample_lib",
-        ":gtest_main",
-    ],
-)
-
-cc_test(
-    name = "sample9_unittest",
-    size = "small",
-    srcs = ["googletest/samples/sample9_unittest.cc"],
-    deps = [":gtest"],
-)
-
-cc_test(
-    name = "sample10_unittest",
-    size = "small",
-    srcs = ["googletest/samples/sample10_unittest.cc"],
-    deps = [":gtest"],
-)
diff --git a/third_party/googletest/CMakeLists.txt b/third_party/googletest/CMakeLists.txt
deleted file mode 100644
index 12fd745..0000000
--- a/third_party/googletest/CMakeLists.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-# Note: CMake support is community-based. The maintainers do not use CMake
-# internally.
-
-cmake_minimum_required(VERSION 2.8.12)
-
-if (POLICY CMP0048)
-  cmake_policy(SET CMP0048 NEW)
-endif (POLICY CMP0048)
-
-project(googletest-distribution)
-set(GOOGLETEST_VERSION 1.10.0)
-
-if (CMAKE_VERSION VERSION_GREATER "3.0.2")
-  if(NOT CYGWIN AND NOT MSYS AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL QNX)
-    set(CMAKE_CXX_EXTENSIONS OFF)
-  endif()
-endif()
-
-enable_testing()
-
-include(CMakeDependentOption)
-include(GNUInstallDirs)
-
-#Note that googlemock target already builds googletest
-option(BUILD_GMOCK "Builds the googlemock subproject" ON)
-option(INSTALL_GTEST "Enable installation of googletest. (Projects embedding googletest may want to turn this OFF.)" ON)
-
-if(BUILD_GMOCK)
-  add_subdirectory( googlemock )
-else()
-  add_subdirectory( googletest )
-endif()
diff --git a/third_party/googletest/CONTRIBUTING.md b/third_party/googletest/CONTRIBUTING.md
deleted file mode 100644
index da45e44..0000000
--- a/third_party/googletest/CONTRIBUTING.md
+++ /dev/null
@@ -1,130 +0,0 @@
-# How to become a contributor and submit your own code
-
-## Contributor License Agreements
-
-We'd love to accept your patches! Before we can take them, we have to jump a
-couple of legal hurdles.
-
-Please fill out either the individual or corporate Contributor License Agreement
-(CLA).
-
-*   If you are an individual writing original source code and you're sure you
-    own the intellectual property, then you'll need to sign an
-    [individual CLA](https://developers.google.com/open-source/cla/individual).
-*   If you work for a company that wants to allow you to contribute your work,
-    then you'll need to sign a
-    [corporate CLA](https://developers.google.com/open-source/cla/corporate).
-
-Follow either of the two links above to access the appropriate CLA and
-instructions for how to sign and return it. Once we receive it, we'll be able to
-accept your pull requests.
-
-## Are you a Googler?
-
-If you are a Googler, please make an attempt to submit an internal change rather
-than a GitHub Pull Request. If you are not able to submit an internal change a
-PR is acceptable as an alternative.
-
-## Contributing A Patch
-
-1.  Submit an issue describing your proposed change to the
-    [issue tracker](https://github.com/google/googletest/issues).
-2.  Please don't mix more than one logical change per submittal, because it
-    makes the history hard to follow. If you want to make a change that doesn't
-    have a corresponding issue in the issue tracker, please create one.
-3.  Also, coordinate with team members that are listed on the issue in question.
-    This ensures that work isn't being duplicated and communicating your plan
-    early also generally leads to better patches.
-4.  If your proposed change is accepted, and you haven't already done so, sign a
-    Contributor License Agreement (see details above).
-5.  Fork the desired repo, develop and test your code changes.
-6.  Ensure that your code adheres to the existing style in the sample to which
-    you are contributing.
-7.  Ensure that your code has an appropriate set of unit tests which all pass.
-8.  Submit a pull request.
-
-## The Google Test and Google Mock Communities
-
-The Google Test community exists primarily through the
-[discussion group](http://groups.google.com/group/googletestframework) and the
-GitHub repository. Likewise, the Google Mock community exists primarily through
-their own [discussion group](http://groups.google.com/group/googlemock). You are
-definitely encouraged to contribute to the discussion and you can also help us
-to keep the effectiveness of the group high by following and promoting the
-guidelines listed here.
-
-### Please Be Friendly
-
-Showing courtesy and respect to others is a vital part of the Google culture,
-and we strongly encourage everyone participating in Google Test development to
-join us in accepting nothing less. Of course, being courteous is not the same as
-failing to constructively disagree with each other, but it does mean that we
-should be respectful of each other when enumerating the 42 technical reasons
-that a particular proposal may not be the best choice. There's never a reason to
-be antagonistic or dismissive toward anyone who is sincerely trying to
-contribute to a discussion.
-
-Sure, C++ testing is serious business and all that, but it's also a lot of fun.
-Let's keep it that way. Let's strive to be one of the friendliest communities in
-all of open source.
-
-As always, discuss Google Test in the official GoogleTest discussion group. You
-don't have to actually submit code in order to sign up. Your participation
-itself is a valuable contribution.
-
-## Style
-
-To keep the source consistent, readable, diffable and easy to merge, we use a
-fairly rigid coding style, as defined by the
-[google-styleguide](https://github.com/google/styleguide) project. All patches
-will be expected to conform to the style outlined
-[here](https://google.github.io/styleguide/cppguide.html). Use
-[.clang-format](https://github.com/google/googletest/blob/master/.clang-format)
-to check your formatting.
-
-## Requirements for Contributors
-
-If you plan to contribute a patch, you need to build Google Test, Google Mock,
-and their own tests from a git checkout, which has further requirements:
-
-*   [Python](https://www.python.org/) v2.3 or newer (for running some of the
-    tests and re-generating certain source files from templates)
-*   [CMake](https://cmake.org/) v2.8.12 or newer
-
-## Developing Google Test and Google Mock
-
-This section discusses how to make your own changes to the Google Test project.
-
-### Testing Google Test and Google Mock Themselves
-
-To make sure your changes work as intended and don't break existing
-functionality, you'll want to compile and run Google Test and GoogleMock's own
-tests. For that you can use CMake:
-
-    mkdir mybuild
-    cd mybuild
-    cmake -Dgtest_build_tests=ON -Dgmock_build_tests=ON ${GTEST_REPO_DIR}
-
-To choose between building only Google Test or Google Mock, you may modify your
-cmake command to be one of each
-
-    cmake -Dgtest_build_tests=ON ${GTEST_DIR} # sets up Google Test tests
-    cmake -Dgmock_build_tests=ON ${GMOCK_DIR} # sets up Google Mock tests
-
-Make sure you have Python installed, as some of Google Test's tests are written
-in Python. If the cmake command complains about not being able to find Python
-(`Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE)`), try telling it
-explicitly where your Python executable can be found:
-
-    cmake -DPYTHON_EXECUTABLE=path/to/python ...
-
-Next, you can build Google Test and / or Google Mock and all desired tests. On
-\*nix, this is usually done by
-
-    make
-
-To run the tests, do
-
-    make test
-
-All tests should pass.
diff --git a/third_party/googletest/CONTRIBUTORS b/third_party/googletest/CONTRIBUTORS
deleted file mode 100644
index 76db0b4..0000000
--- a/third_party/googletest/CONTRIBUTORS
+++ /dev/null
@@ -1,63 +0,0 @@
-# This file contains a list of people who've made non-trivial
-# contribution to the Google C++ Testing Framework project.  People
-# who commit code to the project are encouraged to add their names
-# here.  Please keep the list sorted by first names.
-
-Ajay Joshi <jaj@google.com>
-Balázs Dán <balazs.dan@gmail.com>
-Benoit Sigoure <tsuna@google.com>
-Bharat Mediratta <bharat@menalto.com>
-Bogdan Piloca <boo@google.com>
-Chandler Carruth <chandlerc@google.com>
-Chris Prince <cprince@google.com>
-Chris Taylor <taylorc@google.com>
-Dan Egnor <egnor@google.com>
-Dave MacLachlan <dmaclach@gmail.com>
-David Anderson <danderson@google.com>
-Dean Sturtevant
-Eric Roman <eroman@chromium.org>
-Gene Volovich <gv@cite.com>
-Hady Zalek <hady.zalek@gmail.com>
-Hal Burch <gmock@hburch.com>
-Jeffrey Yasskin <jyasskin@google.com>
-Jim Keller <jimkeller@google.com>
-Joe Walnes <joe@truemesh.com>
-Jon Wray <jwray@google.com>
-Jói Sigurðsson <joi@google.com>
-Keir Mierle <mierle@gmail.com>
-Keith Ray <keith.ray@gmail.com>
-Kenton Varda <kenton@google.com>
-Kostya Serebryany <kcc@google.com>
-Krystian Kuzniarek <krystian.kuzniarek@gmail.com>
-Lev Makhlis
-Manuel Klimek <klimek@google.com>
-Mario Tanev <radix@google.com>
-Mark Paskin
-Markus Heule <markus.heule@gmail.com>
-Matthew Simmons <simmonmt@acm.org>
-Mika Raento <mikie@iki.fi>
-Mike Bland <mbland@google.com>
-Miklós Fazekas <mfazekas@szemafor.com>
-Neal Norwitz <nnorwitz@gmail.com>
-Nermin Ozkiranartli <nermin@google.com>
-Owen Carlsen <ocarlsen@google.com>
-Paneendra Ba <paneendra@google.com>
-Pasi Valminen <pasi.valminen@gmail.com>
-Patrick Hanna <phanna@google.com>
-Patrick Riley <pfr@google.com>
-Paul Menage <menage@google.com>
-Peter Kaminski <piotrk@google.com>
-Piotr Kaminski <piotrk@google.com>
-Preston Jackson <preston.a.jackson@gmail.com>
-Rainer Klaffenboeck <rainer.klaffenboeck@dynatrace.com>
-Russ Cox <rsc@google.com>
-Russ Rufer <russ@pentad.com>
-Sean Mcafee <eefacm@gmail.com>
-Sigurður Ásgeirsson <siggi@google.com>
-Sverre Sundsdal <sundsdal@gmail.com>
-Takeshi Yoshino <tyoshino@google.com>
-Tracy Bialik <tracy@pentad.com>
-Vadim Berman <vadimb@google.com>
-Vlad Losev <vladl@google.com>
-Wolfgang Klier <wklier@google.com>
-Zhanyong Wan <wan@google.com>
diff --git a/third_party/googletest/LICENSE b/third_party/googletest/LICENSE
deleted file mode 100644
index 1941a11..0000000
--- a/third_party/googletest/LICENSE
+++ /dev/null
@@ -1,28 +0,0 @@
-Copyright 2008, Google Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-    * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/third_party/googletest/README.md b/third_party/googletest/README.md
deleted file mode 100644
index 7d872a5..0000000
--- a/third_party/googletest/README.md
+++ /dev/null
@@ -1,140 +0,0 @@
-# GoogleTest
-
-### Announcements
-
-#### Live at Head
-
-GoogleTest now follows the
-[Abseil Live at Head philosophy](https://abseil.io/about/philosophy#upgrade-support).
-We recommend using the latest commit in the `master` branch in your projects.
-
-#### Documentation Updates
-
-Our documentation is now live on GitHub Pages at
-https://google.github.io/googletest/. We recommend browsing the documentation on
-GitHub Pages rather than directly in the repository.
-
-#### Release 1.10.x
-
-[Release 1.10.x](https://github.com/google/googletest/releases/tag/release-1.10.0)
-is now available.
-
-#### Coming Soon
-
-*   We are planning to take a dependency on
-    [Abseil](https://github.com/abseil/abseil-cpp).
-*   More documentation improvements are planned.
-
-## Welcome to **GoogleTest**, Google's C++ test framework!
-
-This repository is a merger of the formerly separate GoogleTest and GoogleMock
-projects. These were so closely related that it makes sense to maintain and
-release them together.
-
-### Getting Started
-
-See the [GoogleTest User's Guide](https://google.github.io/googletest/) for
-documentation. We recommend starting with the
-[GoogleTest Primer](https://google.github.io/googletest/primer.html).
-
-More information about building GoogleTest can be found at
-[googletest/README.md](googletest/README.md).
-
-## Features
-
-*   An [xUnit](https://en.wikipedia.org/wiki/XUnit) test framework.
-*   Test discovery.
-*   A rich set of assertions.
-*   User-defined assertions.
-*   Death tests.
-*   Fatal and non-fatal failures.
-*   Value-parameterized tests.
-*   Type-parameterized tests.
-*   Various options for running the tests.
-*   XML test report generation.
-
-## Supported Platforms
-
-GoogleTest requires a codebase and compiler compliant with the C++11 standard or
-newer.
-
-The GoogleTest code is officially supported on the following platforms.
-Operating systems or tools not listed below are community-supported. For
-community-supported platforms, patches that do not complicate the code may be
-considered.
-
-If you notice any problems on your platform, please file an issue on the
-[GoogleTest GitHub Issue Tracker](https://github.com/google/googletest/issues).
-Pull requests containing fixes are welcome!
-
-### Operating Systems
-
-*   Linux
-*   macOS
-*   Windows
-
-### Compilers
-
-*   gcc 5.0+
-*   clang 5.0+
-*   MSVC 2015+
-
-**macOS users:** Xcode 9.3+ provides clang 5.0+.
-
-### Build Systems
-
-*   [Bazel](https://bazel.build/)
-*   [CMake](https://cmake.org/)
-
-**Note:** Bazel is the build system used by the team internally and in tests.
-CMake is supported on a best-effort basis and by the community.
-
-## Who Is Using GoogleTest?
-
-In addition to many internal projects at Google, GoogleTest is also used by the
-following notable projects:
-
-*   The [Chromium projects](http://www.chromium.org/) (behind the Chrome browser
-    and Chrome OS).
-*   The [LLVM](http://llvm.org/) compiler.
-*   [Protocol Buffers](https://github.com/google/protobuf), Google's data
-    interchange format.
-*   The [OpenCV](http://opencv.org/) computer vision library.
-
-## Related Open Source Projects
-
-[GTest Runner](https://github.com/nholthaus/gtest-runner) is a Qt5 based
-automated test-runner and Graphical User Interface with powerful features for
-Windows and Linux platforms.
-
-[GoogleTest UI](https://github.com/ospector/gtest-gbar) is a test runner that
-runs your test binary, allows you to track its progress via a progress bar, and
-displays a list of test failures. Clicking on one shows failure text. Google
-Test UI is written in C#.
-
-[GTest TAP Listener](https://github.com/kinow/gtest-tap-listener) is an event
-listener for GoogleTest that implements the
-[TAP protocol](https://en.wikipedia.org/wiki/Test_Anything_Protocol) for test
-result output. If your test runner understands TAP, you may find it useful.
-
-[gtest-parallel](https://github.com/google/gtest-parallel) is a test runner that
-runs tests from your binary in parallel to provide significant speed-up.
-
-[GoogleTest Adapter](https://marketplace.visualstudio.com/items?itemName=DavidSchuldenfrei.gtest-adapter)
-is a VS Code extension allowing to view GoogleTest in a tree view, and run/debug
-your tests.
-
-[C++ TestMate](https://github.com/matepek/vscode-catch2-test-adapter) is a VS
-Code extension allowing to view GoogleTest in a tree view, and run/debug your
-tests.
-
-[Cornichon](https://pypi.org/project/cornichon/) is a small Gherkin DSL parser
-that generates stub code for GoogleTest.
-
-## Contributing Changes
-
-Please read
-[`CONTRIBUTING.md`](https://github.com/google/googletest/blob/master/CONTRIBUTING.md)
-for details on how to contribute to this project.
-
-Happy testing!
diff --git a/third_party/googletest/WORKSPACE b/third_party/googletest/WORKSPACE
deleted file mode 100644
index 3b44517..0000000
--- a/third_party/googletest/WORKSPACE
+++ /dev/null
@@ -1,30 +0,0 @@
-workspace(name = "com_google_googletest")
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "com_google_absl",  # 2020-10-13T16:49:13Z
-    sha256 = "00c3707bf9cd5eabd1ec6932cc65b97378c043f22573be3adf7d11bb7af17d06",
-    strip_prefix = "abseil-cpp-f3f785ab59478dd0312bf1b5df65d380650bf0dc",
-    urls = [
-        "https://github.com/abseil/abseil-cpp/archive/f3f785ab59478dd0312bf1b5df65d380650bf0dc.zip",
-    ],
-)
-
-http_archive(
-    name = "rules_cc",  # 2020-10-05T06:01:24Z
-    sha256 = "35ea62c63cd71d4000efe85f9f4f17e8afb23896c37ee9510952db2e9d8fbb70",
-    strip_prefix = "rules_cc-f055da4ff0cb2b3c73de1fe2f094ebdfb8b3acb9",
-    urls = [
-        "https://github.com/bazelbuild/rules_cc/archive/f055da4ff0cb2b3c73de1fe2f094ebdfb8b3acb9.zip",
-    ],
-)
-
-http_archive(
-    name = "rules_python",  # 2020-09-30T13:50:21Z
-    sha256 = "6e49996ad3cf45b2232b8f94ca1e3ead369c28394c51632be8d85fe826383012",
-    strip_prefix = "rules_python-c064f7008a30f307ea7516cf52358a653011f82b",
-    urls = [
-        "https://github.com/bazelbuild/rules_python/archive/c064f7008a30f307ea7516cf52358a653011f82b.zip",
-    ],
-)
diff --git a/third_party/googletest/ci/linux-presubmit.sh b/third_party/googletest/ci/linux-presubmit.sh
deleted file mode 100644
index d02130c..0000000
--- a/third_party/googletest/ci/linux-presubmit.sh
+++ /dev/null
@@ -1,124 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2020, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -euox pipefail
-
-readonly LINUX_LATEST_CONTAINER="gcr.io/google.com/absl-177019/linux_hybrid-latest:20201008"
-readonly LINUX_GCC_FLOOR_CONTAINER="gcr.io/google.com/absl-177019/linux_gcc-floor:20201015"
-
-if [[ -z ${GTEST_ROOT:-} ]]; then
-  GTEST_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-if [[ -z ${STD:-} ]]; then
-  STD="c++11 c++14 c++17 c++20"
-fi
-
-# Test the CMake build
-for cc in /usr/local/bin/gcc /opt/llvm/clang/bin/clang; do
-  for cmake_off_on in OFF ON; do
-    time docker run \
-      --volume="${GTEST_ROOT}:/src:ro" \
-      --tmpfs="/build:exec" \
-      --workdir="/build" \
-      --rm \
-      --env="CC=${cc}" \
-      --env="CXX_FLAGS=\"-Werror -Wdeprecated\"" \
-      ${LINUX_LATEST_CONTAINER} \
-      /bin/bash -c "
-        cmake /src \
-          -DCMAKE_CXX_STANDARD=11 \
-          -Dgtest_build_samples=ON \
-          -Dgtest_build_tests=ON \
-          -Dgmock_build_tests=ON \
-          -Dcxx_no_exception=${cmake_off_on} \
-          -Dcxx_no_rtti=${cmake_off_on} && \
-        make -j$(nproc) && \
-        ctest -j$(nproc) --output-on-failure"
-  done
-done
-
-# Do one test with an older version of GCC
-time docker run \
-  --volume="${GTEST_ROOT}:/src:ro" \
-  --workdir="/src" \
-  --rm \
-  --env="CC=/usr/local/bin/gcc" \
-  ${LINUX_GCC_FLOOR_CONTAINER} \
-    /usr/local/bin/bazel test ... \
-      --copt="-Wall" \
-      --copt="-Werror" \
-      --copt="-Wno-error=pragmas" \
-      --keep_going \
-      --show_timestamps \
-      --test_output=errors
-
-# Test GCC
-for std in ${STD}; do
-  for absl in 0 1; do
-    time docker run \
-      --volume="${GTEST_ROOT}:/src:ro" \
-      --workdir="/src" \
-      --rm \
-      --env="CC=/usr/local/bin/gcc" \
-      --env="BAZEL_CXXOPTS=-std=${std}" \
-      ${LINUX_LATEST_CONTAINER} \
-      /usr/local/bin/bazel test ... \
-        --copt="-Wall" \
-        --copt="-Werror" \
-        --define="absl=${absl}" \
-        --keep_going \
-        --show_timestamps \
-        --test_output=errors
-  done
-done
-
-# Test Clang
-for std in ${STD}; do
-  for absl in 0 1; do
-    time docker run \
-      --volume="${GTEST_ROOT}:/src:ro" \
-      --workdir="/src" \
-      --rm \
-      --env="CC=/opt/llvm/clang/bin/clang" \
-      --env="BAZEL_CXXOPTS=-std=${std}" \
-      ${LINUX_LATEST_CONTAINER} \
-      /usr/local/bin/bazel test ... \
-        --copt="--gcc-toolchain=/usr/local" \
-        --copt="-Wall" \
-        --copt="-Werror" \
-        --define="absl=${absl}" \
-        --keep_going \
-        --linkopt="--gcc-toolchain=/usr/local" \
-        --show_timestamps \
-        --test_output=errors
-  done
-done
diff --git a/third_party/googletest/ci/macos-presubmit.sh b/third_party/googletest/ci/macos-presubmit.sh
deleted file mode 100644
index d6423fa..0000000
--- a/third_party/googletest/ci/macos-presubmit.sh
+++ /dev/null
@@ -1,73 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2020, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -euox pipefail
-
-if [[ -z ${GTEST_ROOT:-} ]]; then
-  GTEST_ROOT="$(realpath $(dirname ${0})/..)"
-fi
-
-# Test the CMake build
-for cmake_off_on in OFF ON; do
-  BUILD_DIR=$(mktemp -d build_dir.XXXXXXXX)
-  cd ${BUILD_DIR}
-  time cmake ${GTEST_ROOT} \
-    -DCMAKE_CXX_STANDARD=11 \
-    -Dgtest_build_samples=ON \
-    -Dgtest_build_tests=ON \
-    -Dgmock_build_tests=ON \
-    -Dcxx_no_exception=${cmake_off_on} \
-    -Dcxx_no_rtti=${cmake_off_on}
-  time make
-  time ctest -j$(nproc) --output-on-failure
-done
-
-# Test the Bazel build
-
-# If we are running on Kokoro, check for a versioned Bazel binary.
-KOKORO_GFILE_BAZEL_BIN="bazel-3.7.0-darwin-x86_64"
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f ${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN} ]]; then
-  BAZEL_BIN="${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN}"
-  chmod +x ${BAZEL_BIN}
-else
-  BAZEL_BIN="bazel"
-fi
-
-cd ${GTEST_ROOT}
-for absl in 0 1; do
-  ${BAZEL_BIN} test ... \
-    --copt="-Wall" \
-    --copt="-Werror" \
-    --define="absl=${absl}" \
-    --keep_going \
-    --show_timestamps \
-    --test_output=errors
-done
diff --git a/third_party/googletest/docs/_config.yml b/third_party/googletest/docs/_config.yml
deleted file mode 100644
index d12867e..0000000
--- a/third_party/googletest/docs/_config.yml
+++ /dev/null
@@ -1 +0,0 @@
-title: GoogleTest
diff --git a/third_party/googletest/docs/_data/navigation.yml b/third_party/googletest/docs/_data/navigation.yml
deleted file mode 100644
index fdde283..0000000
--- a/third_party/googletest/docs/_data/navigation.yml
+++ /dev/null
@@ -1,35 +0,0 @@
-nav:
-- section: "Get Started"
-  items:
-  - title: "Supported Platforms"
-    url: "/platforms.html"
-  - title: "Quickstart: Bazel"
-    url: "/quickstart-bazel.html"
-  - title: "Quickstart: CMake"
-    url: "/quickstart-cmake.html"
-- section: "Guides"
-  items:
-  - title: "GoogleTest Primer"
-    url: "/primer.html"
-  - title: "Advanced Topics"
-    url: "/advanced.html"
-  - title: "Mocking for Dummies"
-    url: "/gmock_for_dummies.html"
-  - title: "Mocking Cookbook"
-    url: "/gmock_cook_book.html"
-  - title: "Mocking Cheat Sheet"
-    url: "/gmock_cheat_sheet.html"
-- section: "References"
-  items:
-  - title: "Matchers"
-    url: "/reference/matchers.html"
-  - title: "Testing FAQ"
-    url: "/faq.html"
-  - title: "Mocking FAQ"
-    url: "/gmock_faq.html"
-  - title: "Code Samples"
-    url: "/samples.html"
-  - title: "Using pkg-config"
-    url: "/pkgconfig.html"
-  - title: "Community Documentation"
-    url: "/community_created_documentation.html"
diff --git a/third_party/googletest/docs/_layouts/default.html b/third_party/googletest/docs/_layouts/default.html
deleted file mode 100644
index 731042f..0000000
--- a/third_party/googletest/docs/_layouts/default.html
+++ /dev/null
@@ -1,53 +0,0 @@
-<!DOCTYPE html>
-<html lang="{{ site.lang | default: "en-US" }}">
-  <head>
-    <meta charset="UTF-8">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-
-{% seo %}
-    <link rel="stylesheet" href="{{ "/assets/css/style.css?v=" | append: site.github.build_revision | relative_url }}">
-  </head>
-  <body>
-    <div class="sidebar">
-      <div class="header">
-        <h1><a href="{{ "/" | relative_url }}">{{ site.title | default: "Documentation" }}</a></h1>
-      </div>
-      <input type="checkbox" id="nav-toggle" class="nav-toggle">
-      <label for="nav-toggle" class="expander">
-        <span class="arrow"></span>
-      </label>
-      <nav>
-        {% for item in site.data.navigation.nav %}
-        <h2>{{ item.section }}</h2>
-        <ul>
-          {% for subitem in item.items %}
-          <a href="{{subitem.url | relative_url }}">
-            <li class="{% if subitem.url == page.url %}active{% endif %}">
-              {{ subitem.title }}
-            </li>
-          </a>
-          {% endfor %}
-        </ul>
-        {% endfor %}
-      </nav>
-    </div>
-    <div class="main markdown-body">
-      <div class="main-inner">
-        {{ content }}
-      </div>
-    </div>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/4.1.0/anchor.min.js" integrity="sha256-lZaRhKri35AyJSypXXs4o6OPFTbTmUoltBbDCbdzegg=" crossorigin="anonymous"></script>
-    <script>anchors.add('.main h2, .main h3, .main h4, .main h5, .main h6');</script>
-    {% if site.google_analytics %}
-    <script>
-      (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-      (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-      m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-      })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-      ga('create', '{{ site.google_analytics }}', 'auto');
-      ga('send', 'pageview');
-    </script>
-    {% endif %}
-  </body>
-</html>
diff --git a/third_party/googletest/docs/_sass/main.scss b/third_party/googletest/docs/_sass/main.scss
deleted file mode 100644
index 91e633b..0000000
--- a/third_party/googletest/docs/_sass/main.scss
+++ /dev/null
@@ -1,193 +0,0 @@
-// Styles for GoogleTest docs website on GitHub Pages.
-// Color variables are defined in
-// https://github.com/pages-themes/primer/tree/master/_sass/primer-support/lib/variables
-
-$sidebar-width: 260px;
-
-body {
-  display: flex;
-  margin: 0;
-}
-
-.sidebar {
-  background: $black;
-  color: $text-white;
-  flex-shrink: 0;
-  height: 100vh;
-  overflow: auto;
-  position: sticky;
-  top: 0;
-  width: $sidebar-width;
-}
-
-.sidebar h1 {
-  font-size: 1.5em;
-}
-
-.sidebar h2 {
-  color: $gray-light;
-  font-size: 0.8em;
-  font-weight: normal;
-  margin-bottom: 0.8em;
-  padding-left: 2.5em;
-  text-transform: uppercase;
-}
-
-.sidebar .header {
-  background: $black;
-  padding: 2em;
-  position: sticky;
-  top: 0;
-  width: 100%;
-}
-
-.sidebar .header a {
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diff --git a/third_party/googletest/docs/advanced.md b/third_party/googletest/docs/advanced.md
deleted file mode 100644
index 0fe7b8e..0000000
--- a/third_party/googletest/docs/advanced.md
+++ /dev/null
@@ -1,2661 +0,0 @@
-# Advanced googletest Topics
-
-## Introduction
-
-Now that you have read the [googletest Primer](primer.md) and learned how to
-write tests using googletest, it's time to learn some new tricks. This document
-will show you more assertions as well as how to construct complex failure
-messages, propagate fatal failures, reuse and speed up your test fixtures, and
-use various flags with your tests.
-
-## More Assertions
-
-This section covers some less frequently used, but still significant,
-assertions.
-
-### Explicit Success and Failure
-
-These three assertions do not actually test a value or expression. Instead, they
-generate a success or failure directly. Like the macros that actually perform a
-test, you may stream a custom failure message into them.
-
-```c++
-SUCCEED();
-```
-
-Generates a success. This does **NOT** make the overall test succeed. A test is
-considered successful only if none of its assertions fail during its execution.
-
-{: .callout .note}
-NOTE: `SUCCEED()` is purely documentary and currently doesn't generate any
-user-visible output. However, we may add `SUCCEED()` messages to googletest's
-output in the future.
-
-```c++
-FAIL();
-ADD_FAILURE();
-ADD_FAILURE_AT("file_path", line_number);
-```
-
-`FAIL()` generates a fatal failure, while `ADD_FAILURE()` and `ADD_FAILURE_AT()`
-generate a nonfatal failure. These are useful when control flow, rather than a
-Boolean expression, determines the test's success or failure. For example, you
-might want to write something like:
-
-```c++
-switch(expression) {
-  case 1:
-     ... some checks ...
-  case 2:
-     ... some other checks ...
-  default:
-     FAIL() << "We shouldn't get here.";
-}
-```
-
-{: .callout .note}
-NOTE: you can only use `FAIL()` in functions that return `void`. See the
-[Assertion Placement section](#assertion-placement) for more information.
-
-### Exception Assertions
-
-These are for verifying that a piece of code throws (or does not throw) an
-exception of the given type:
-
-Fatal assertion                            | Nonfatal assertion                         | Verifies
------------------------------------------- | ------------------------------------------ | --------
-`ASSERT_THROW(statement, exception_type);` | `EXPECT_THROW(statement, exception_type);` | `statement` throws an exception of the given type
-`ASSERT_ANY_THROW(statement);`             | `EXPECT_ANY_THROW(statement);`             | `statement` throws an exception of any type
-`ASSERT_NO_THROW(statement);`              | `EXPECT_NO_THROW(statement);`              | `statement` doesn't throw any exception
-
-Examples:
-
-```c++
-ASSERT_THROW(Foo(5), bar_exception);
-
-EXPECT_NO_THROW({
-  int n = 5;
-  Bar(&n);
-});
-```
-
-**Availability**: requires exceptions to be enabled in the build environment
-
-### Predicate Assertions for Better Error Messages
-
-Even though googletest has a rich set of assertions, they can never be complete,
-as it's impossible (nor a good idea) to anticipate all scenarios a user might
-run into. Therefore, sometimes a user has to use `EXPECT_TRUE()` to check a
-complex expression, for lack of a better macro. This has the problem of not
-showing you the values of the parts of the expression, making it hard to
-understand what went wrong. As a workaround, some users choose to construct the
-failure message by themselves, streaming it into `EXPECT_TRUE()`. However, this
-is awkward especially when the expression has side-effects or is expensive to
-evaluate.
-
-googletest gives you three different options to solve this problem:
-
-#### Using an Existing Boolean Function
-
-If you already have a function or functor that returns `bool` (or a type that
-can be implicitly converted to `bool`), you can use it in a *predicate
-assertion* to get the function arguments printed for free:
-
-
-| Fatal assertion                   | Nonfatal assertion                | Verifies                    |
-| --------------------------------- | --------------------------------- | --------------------------- |
-| `ASSERT_PRED1(pred1, val1)`       | `EXPECT_PRED1(pred1, val1)`       | `pred1(val1)` is true       |
-| `ASSERT_PRED2(pred2, val1, val2)` | `EXPECT_PRED2(pred2, val1, val2)` | `pred2(val1, val2)` is true |
-| `...`                             | `...`                             | `...`                       |
-
-In the above, `predn` is an `n`-ary predicate function or functor, where `val1`,
-`val2`, ..., and `valn` are its arguments. The assertion succeeds if the
-predicate returns `true` when applied to the given arguments, and fails
-otherwise. When the assertion fails, it prints the value of each argument. In
-either case, the arguments are evaluated exactly once.
-
-Here's an example. Given
-
-```c++
-// Returns true if m and n have no common divisors except 1.
-bool MutuallyPrime(int m, int n) { ... }
-
-const int a = 3;
-const int b = 4;
-const int c = 10;
-```
-
-the assertion
-
-```c++
-  EXPECT_PRED2(MutuallyPrime, a, b);
-```
-
-will succeed, while the assertion
-
-```c++
-  EXPECT_PRED2(MutuallyPrime, b, c);
-```
-
-will fail with the message
-
-```none
-MutuallyPrime(b, c) is false, where
-b is 4
-c is 10
-```
-
-{: .callout .note}
-> NOTE:
->
-> 1.  If you see a compiler error "no matching function to call" when using
->     `ASSERT_PRED*` or `EXPECT_PRED*`, please see
->     [this](faq.md#the-compiler-complains-no-matching-function-to-call-when-i-use-assert_pred-how-do-i-fix-it)
->     for how to resolve it.
-
-#### Using a Function That Returns an AssertionResult
-
-While `EXPECT_PRED*()` and friends are handy for a quick job, the syntax is not
-satisfactory: you have to use different macros for different arities, and it
-feels more like Lisp than C++. The `::testing::AssertionResult` class solves
-this problem.
-
-An `AssertionResult` object represents the result of an assertion (whether it's
-a success or a failure, and an associated message). You can create an
-`AssertionResult` using one of these factory functions:
-
-```c++
-namespace testing {
-
-// Returns an AssertionResult object to indicate that an assertion has
-// succeeded.
-AssertionResult AssertionSuccess();
-
-// Returns an AssertionResult object to indicate that an assertion has
-// failed.
-AssertionResult AssertionFailure();
-
-}
-```
-
-You can then use the `<<` operator to stream messages to the `AssertionResult`
-object.
-
-To provide more readable messages in Boolean assertions (e.g. `EXPECT_TRUE()`),
-write a predicate function that returns `AssertionResult` instead of `bool`. For
-example, if you define `IsEven()` as:
-
-```c++
-testing::AssertionResult IsEven(int n) {
-  if ((n % 2) == 0)
-    return testing::AssertionSuccess();
-  else
-    return testing::AssertionFailure() << n << " is odd";
-}
-```
-
-instead of:
-
-```c++
-bool IsEven(int n) {
-  return (n % 2) == 0;
-}
-```
-
-the failed assertion `EXPECT_TRUE(IsEven(Fib(4)))` will print:
-
-```none
-Value of: IsEven(Fib(4))
-  Actual: false (3 is odd)
-Expected: true
-```
-
-instead of a more opaque
-
-```none
-Value of: IsEven(Fib(4))
-  Actual: false
-Expected: true
-```
-
-If you want informative messages in `EXPECT_FALSE` and `ASSERT_FALSE` as well
-(one third of Boolean assertions in the Google code base are negative ones), and
-are fine with making the predicate slower in the success case, you can supply a
-success message:
-
-```c++
-testing::AssertionResult IsEven(int n) {
-  if ((n % 2) == 0)
-    return testing::AssertionSuccess() << n << " is even";
-  else
-    return testing::AssertionFailure() << n << " is odd";
-}
-```
-
-Then the statement `EXPECT_FALSE(IsEven(Fib(6)))` will print
-
-```none
-  Value of: IsEven(Fib(6))
-     Actual: true (8 is even)
-  Expected: false
-```
-
-#### Using a Predicate-Formatter
-
-If you find the default message generated by `(ASSERT|EXPECT)_PRED*` and
-`(ASSERT|EXPECT)_(TRUE|FALSE)` unsatisfactory, or some arguments to your
-predicate do not support streaming to `ostream`, you can instead use the
-following *predicate-formatter assertions* to *fully* customize how the message
-is formatted:
-
-Fatal assertion                                  | Nonfatal assertion                               | Verifies
------------------------------------------------- | ------------------------------------------------ | --------
-`ASSERT_PRED_FORMAT1(pred_format1, val1);`       | `EXPECT_PRED_FORMAT1(pred_format1, val1);`       | `pred_format1(val1)` is successful
-`ASSERT_PRED_FORMAT2(pred_format2, val1, val2);` | `EXPECT_PRED_FORMAT2(pred_format2, val1, val2);` | `pred_format2(val1, val2)` is successful
-`...`                                            | `...`                                            | ...
-
-The difference between this and the previous group of macros is that instead of
-a predicate, `(ASSERT|EXPECT)_PRED_FORMAT*` take a *predicate-formatter*
-(`pred_formatn`), which is a function or functor with the signature:
-
-```c++
-testing::AssertionResult PredicateFormattern(const char* expr1,
-                                             const char* expr2,
-                                             ...
-                                             const char* exprn,
-                                             T1 val1,
-                                             T2 val2,
-                                             ...
-                                             Tn valn);
-```
-
-where `val1`, `val2`, ..., and `valn` are the values of the predicate arguments,
-and `expr1`, `expr2`, ..., and `exprn` are the corresponding expressions as they
-appear in the source code. The types `T1`, `T2`, ..., and `Tn` can be either
-value types or reference types. For example, if an argument has type `Foo`, you
-can declare it as either `Foo` or `const Foo&`, whichever is appropriate.
-
-As an example, let's improve the failure message in `MutuallyPrime()`, which was
-used with `EXPECT_PRED2()`:
-
-```c++
-// Returns the smallest prime common divisor of m and n,
-// or 1 when m and n are mutually prime.
-int SmallestPrimeCommonDivisor(int m, int n) { ... }
-
-// A predicate-formatter for asserting that two integers are mutually prime.
-testing::AssertionResult AssertMutuallyPrime(const char* m_expr,
-                                             const char* n_expr,
-                                             int m,
-                                             int n) {
-  if (MutuallyPrime(m, n)) return testing::AssertionSuccess();
-
-  return testing::AssertionFailure() << m_expr << " and " << n_expr
-      << " (" << m << " and " << n << ") are not mutually prime, "
-      << "as they have a common divisor " << SmallestPrimeCommonDivisor(m, n);
-}
-```
-
-With this predicate-formatter, we can use
-
-```c++
-  EXPECT_PRED_FORMAT2(AssertMutuallyPrime, b, c);
-```
-
-to generate the message
-
-```none
-b and c (4 and 10) are not mutually prime, as they have a common divisor 2.
-```
-
-As you may have realized, many of the built-in assertions we introduced earlier
-are special cases of `(EXPECT|ASSERT)_PRED_FORMAT*`. In fact, most of them are
-indeed defined using `(EXPECT|ASSERT)_PRED_FORMAT*`.
-
-### Floating-Point Comparison
-
-Comparing floating-point numbers is tricky. Due to round-off errors, it is very
-unlikely that two floating-points will match exactly. Therefore, `ASSERT_EQ` 's
-naive comparison usually doesn't work. And since floating-points can have a wide
-value range, no single fixed error bound works. It's better to compare by a
-fixed relative error bound, except for values close to 0 due to the loss of
-precision there.
-
-In general, for floating-point comparison to make sense, the user needs to
-carefully choose the error bound. If they don't want or care to, comparing in
-terms of Units in the Last Place (ULPs) is a good default, and googletest
-provides assertions to do this. Full details about ULPs are quite long; if you
-want to learn more, see
-[here](https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/).
-
-#### Floating-Point Macros
-
-
-| Fatal assertion                 | Nonfatal assertion              | Verifies                                 |
-| ------------------------------- | ------------------------------- | ---------------------------------------- |
-| `ASSERT_FLOAT_EQ(val1, val2);`  | `EXPECT_FLOAT_EQ(val1, val2);`  | the two `float` values are almost equal  |
-| `ASSERT_DOUBLE_EQ(val1, val2);` | `EXPECT_DOUBLE_EQ(val1, val2);` | the two `double` values are almost equal |
-
-
-By "almost equal" we mean the values are within 4 ULP's from each other.
-
-The following assertions allow you to choose the acceptable error bound:
-
-
-| Fatal assertion                       | Nonfatal assertion                    | Verifies                                                                         |
-| ------------------------------------- | ------------------------------------- | -------------------------------------------------------------------------------- |
-| `ASSERT_NEAR(val1, val2, abs_error);` | `EXPECT_NEAR(val1, val2, abs_error);` | the difference between `val1` and `val2` doesn't exceed the given absolute error |
-
-
-#### Floating-Point Predicate-Format Functions
-
-Some floating-point operations are useful, but not that often used. In order to
-avoid an explosion of new macros, we provide them as predicate-format functions
-that can be used in predicate assertion macros (e.g. `EXPECT_PRED_FORMAT2`,
-etc).
-
-```c++
-EXPECT_PRED_FORMAT2(testing::FloatLE, val1, val2);
-EXPECT_PRED_FORMAT2(testing::DoubleLE, val1, val2);
-```
-
-Verifies that `val1` is less than, or almost equal to, `val2`. You can replace
-`EXPECT_PRED_FORMAT2` in the above table with `ASSERT_PRED_FORMAT2`.
-
-### Asserting Using gMock Matchers
-
-gMock comes with a library of *matchers* for validating arguments passed to mock
-objects. A gMock matcher is basically a predicate that knows how to describe
-itself. It can be used in these assertion macros:
-
-
-| Fatal assertion                | Nonfatal assertion             | Verifies              |
-| ------------------------------ | ------------------------------ | --------------------- |
-| `ASSERT_THAT(value, matcher);` | `EXPECT_THAT(value, matcher);` | value matches matcher |
-
-
-For example, `StartsWith(prefix)` is a matcher that matches a string starting
-with `prefix`, and you can write:
-
-```c++
-using ::testing::StartsWith;
-...
-    // Verifies that Foo() returns a string starting with "Hello".
-    EXPECT_THAT(Foo(), StartsWith("Hello"));
-```
-
-See
-[Using Matchers in googletest Assertions](gmock_cook_book.md#using-matchers-in-googletest-assertions)
-in the gMock Cookbook for more details. For a list of built-in matchers, see the
-[Matchers Reference](reference/matchers.md). You can also write your own
-matchers—see [Writing New Matchers Quickly](gmock_cook_book.md#NewMatchers).
-
-gMock is bundled with googletest, so you don't need to add any build dependency
-in order to take advantage of this. Just include `"gmock/gmock.h"`
-and you're ready to go.
-
-### More String Assertions
-
-(Please read the [previous](#asserting-using-gmock-matchers) section first if
-you haven't.)
-
-You can use the gMock [string matchers](reference/matchers.md#string-matchers)
-with `EXPECT_THAT()` or `ASSERT_THAT()` to do more string comparison tricks
-(sub-string, prefix, suffix, regular expression, and etc). For example,
-
-```c++
-using ::testing::HasSubstr;
-using ::testing::MatchesRegex;
-...
-  ASSERT_THAT(foo_string, HasSubstr("needle"));
-  EXPECT_THAT(bar_string, MatchesRegex("\\w*\\d+"));
-```
-
-If the string contains a well-formed HTML or XML document, you can check whether
-its DOM tree matches an
-[XPath expression](http://www.w3.org/TR/xpath/#contents):
-
-```c++
-// Currently still in //template/prototemplate/testing:xpath_matcher
-#include "template/prototemplate/testing/xpath_matcher.h"
-using ::prototemplate::testing::MatchesXPath;
-EXPECT_THAT(html_string, MatchesXPath("//a[text()='click here']"));
-```
-
-### Windows HRESULT assertions
-
-These assertions test for `HRESULT` success or failure.
-
-Fatal assertion                        | Nonfatal assertion                     | Verifies
--------------------------------------- | -------------------------------------- | --------
-`ASSERT_HRESULT_SUCCEEDED(expression)` | `EXPECT_HRESULT_SUCCEEDED(expression)` | `expression` is a success `HRESULT`
-`ASSERT_HRESULT_FAILED(expression)`    | `EXPECT_HRESULT_FAILED(expression)`    | `expression` is a failure `HRESULT`
-
-The generated output contains the human-readable error message associated with
-the `HRESULT` code returned by `expression`.
-
-You might use them like this:
-
-```c++
-CComPtr<IShellDispatch2> shell;
-ASSERT_HRESULT_SUCCEEDED(shell.CoCreateInstance(L"Shell.Application"));
-CComVariant empty;
-ASSERT_HRESULT_SUCCEEDED(shell->ShellExecute(CComBSTR(url), empty, empty, empty, empty));
-```
-
-### Type Assertions
-
-You can call the function
-
-```c++
-::testing::StaticAssertTypeEq<T1, T2>();
-```
-
-to assert that types `T1` and `T2` are the same. The function does nothing if
-the assertion is satisfied. If the types are different, the function call will
-fail to compile, the compiler error message will say that
-`T1 and T2 are not the same type` and most likely (depending on the compiler)
-show you the actual values of `T1` and `T2`. This is mainly useful inside
-template code.
-
-**Caveat**: When used inside a member function of a class template or a function
-template, `StaticAssertTypeEq<T1, T2>()` is effective only if the function is
-instantiated. For example, given:
-
-```c++
-template <typename T> class Foo {
- public:
-  void Bar() { testing::StaticAssertTypeEq<int, T>(); }
-};
-```
-
-the code:
-
-```c++
-void Test1() { Foo<bool> foo; }
-```
-
-will not generate a compiler error, as `Foo<bool>::Bar()` is never actually
-instantiated. Instead, you need:
-
-```c++
-void Test2() { Foo<bool> foo; foo.Bar(); }
-```
-
-to cause a compiler error.
-
-### Assertion Placement
-
-You can use assertions in any C++ function. In particular, it doesn't have to be
-a method of the test fixture class. The one constraint is that assertions that
-generate a fatal failure (`FAIL*` and `ASSERT_*`) can only be used in
-void-returning functions. This is a consequence of Google's not using
-exceptions. By placing it in a non-void function you'll get a confusing compile
-error like `"error: void value not ignored as it ought to be"` or `"cannot
-initialize return object of type 'bool' with an rvalue of type 'void'"` or
-`"error: no viable conversion from 'void' to 'string'"`.
-
-If you need to use fatal assertions in a function that returns non-void, one
-option is to make the function return the value in an out parameter instead. For
-example, you can rewrite `T2 Foo(T1 x)` to `void Foo(T1 x, T2* result)`. You
-need to make sure that `*result` contains some sensible value even when the
-function returns prematurely. As the function now returns `void`, you can use
-any assertion inside of it.
-
-If changing the function's type is not an option, you should just use assertions
-that generate non-fatal failures, such as `ADD_FAILURE*` and `EXPECT_*`.
-
-{: .callout .note}
-NOTE: Constructors and destructors are not considered void-returning functions,
-according to the C++ language specification, and so you may not use fatal
-assertions in them; you'll get a compilation error if you try. Instead, either
-call `abort` and crash the entire test executable, or put the fatal assertion in
-a `SetUp`/`TearDown` function; see
-[constructor/destructor vs. `SetUp`/`TearDown`](faq.md#CtorVsSetUp)
-
-{: .callout .warning}
-WARNING: A fatal assertion in a helper function (private void-returning method)
-called from a constructor or destructor does not terminate the current test, as
-your intuition might suggest: it merely returns from the constructor or
-destructor early, possibly leaving your object in a partially-constructed or
-partially-destructed state! You almost certainly want to `abort` or use
-`SetUp`/`TearDown` instead.
-
-## Skipping test execution
-
-Related to the assertions `SUCCEED()` and `FAIL()`, you can prevent further test
-execution at runtime with the `GTEST_SKIP()` macro. This is useful when you need
-to check for preconditions of the system under test during runtime and skip
-tests in a meaningful way.
-
-`GTEST_SKIP()` can be used in individual test cases or in the `SetUp()` methods
-of classes derived from either `::testing::Environment` or `::testing::Test`.
-For example:
-
-```c++
-TEST(SkipTest, DoesSkip) {
-  GTEST_SKIP() << "Skipping single test";
-  EXPECT_EQ(0, 1);  // Won't fail; it won't be executed
-}
-
-class SkipFixture : public ::testing::Test {
- protected:
-  void SetUp() override {
-    GTEST_SKIP() << "Skipping all tests for this fixture";
-  }
-};
-
-// Tests for SkipFixture won't be executed.
-TEST_F(SkipFixture, SkipsOneTest) {
-  EXPECT_EQ(5, 7);  // Won't fail
-}
-```
-
-As with assertion macros, you can stream a custom message into `GTEST_SKIP()`.
-
-## Teaching googletest How to Print Your Values
-
-When a test assertion such as `EXPECT_EQ` fails, googletest prints the argument
-values to help you debug. It does this using a user-extensible value printer.
-
-This printer knows how to print built-in C++ types, native arrays, STL
-containers, and any type that supports the `<<` operator. For other types, it
-prints the raw bytes in the value and hopes that you the user can figure it out.
-
-As mentioned earlier, the printer is *extensible*. That means you can teach it
-to do a better job at printing your particular type than to dump the bytes. To
-do that, define `<<` for your type:
-
-```c++
-#include <ostream>
-
-namespace foo {
-
-class Bar {  // We want googletest to be able to print instances of this.
-...
-  // Create a free inline friend function.
-  friend std::ostream& operator<<(std::ostream& os, const Bar& bar) {
-    return os << bar.DebugString();  // whatever needed to print bar to os
-  }
-};
-
-// If you can't declare the function in the class it's important that the
-// << operator is defined in the SAME namespace that defines Bar.  C++'s look-up
-// rules rely on that.
-std::ostream& operator<<(std::ostream& os, const Bar& bar) {
-  return os << bar.DebugString();  // whatever needed to print bar to os
-}
-
-}  // namespace foo
-```
-
-Sometimes, this might not be an option: your team may consider it bad style to
-have a `<<` operator for `Bar`, or `Bar` may already have a `<<` operator that
-doesn't do what you want (and you cannot change it). If so, you can instead
-define a `PrintTo()` function like this:
-
-```c++
-#include <ostream>
-
-namespace foo {
-
-class Bar {
-  ...
-  friend void PrintTo(const Bar& bar, std::ostream* os) {
-    *os << bar.DebugString();  // whatever needed to print bar to os
-  }
-};
-
-// If you can't declare the function in the class it's important that PrintTo()
-// is defined in the SAME namespace that defines Bar.  C++'s look-up rules rely
-// on that.
-void PrintTo(const Bar& bar, std::ostream* os) {
-  *os << bar.DebugString();  // whatever needed to print bar to os
-}
-
-}  // namespace foo
-```
-
-If you have defined both `<<` and `PrintTo()`, the latter will be used when
-googletest is concerned. This allows you to customize how the value appears in
-googletest's output without affecting code that relies on the behavior of its
-`<<` operator.
-
-If you want to print a value `x` using googletest's value printer yourself, just
-call `::testing::PrintToString(x)`, which returns an `std::string`:
-
-```c++
-vector<pair<Bar, int> > bar_ints = GetBarIntVector();
-
-EXPECT_TRUE(IsCorrectBarIntVector(bar_ints))
-    << "bar_ints = " << testing::PrintToString(bar_ints);
-```
-
-## Death Tests
-
-In many applications, there are assertions that can cause application failure if
-a condition is not met. These sanity checks, which ensure that the program is in
-a known good state, are there to fail at the earliest possible time after some
-program state is corrupted. If the assertion checks the wrong condition, then
-the program may proceed in an erroneous state, which could lead to memory
-corruption, security holes, or worse. Hence it is vitally important to test that
-such assertion statements work as expected.
-
-Since these precondition checks cause the processes to die, we call such tests
-_death tests_. More generally, any test that checks that a program terminates
-(except by throwing an exception) in an expected fashion is also a death test.
-
-Note that if a piece of code throws an exception, we don't consider it "death"
-for the purpose of death tests, as the caller of the code could catch the
-exception and avoid the crash. If you want to verify exceptions thrown by your
-code, see [Exception Assertions](#ExceptionAssertions).
-
-If you want to test `EXPECT_*()/ASSERT_*()` failures in your test code, see
-Catching Failures
-
-### How to Write a Death Test
-
-googletest has the following macros to support death tests:
-
-Fatal assertion                                  | Nonfatal assertion                               | Verifies
------------------------------------------------- | ------------------------------------------------ | --------
-`ASSERT_DEATH(statement, matcher);`              | `EXPECT_DEATH(statement, matcher);`              | `statement` crashes with the given error
-`ASSERT_DEATH_IF_SUPPORTED(statement, matcher);` | `EXPECT_DEATH_IF_SUPPORTED(statement, matcher);` | if death tests are supported, verifies that `statement` crashes with the given error; otherwise verifies nothing
-`ASSERT_DEBUG_DEATH(statement, matcher);`        | `EXPECT_DEBUG_DEATH(statement, matcher);`        | `statement` crashes with the given error **in debug mode**. When not in debug (i.e. `NDEBUG` is defined), this just executes `statement`
-`ASSERT_EXIT(statement, predicate, matcher);`    | `EXPECT_EXIT(statement, predicate, matcher);`    | `statement` exits with the given error, and its exit code matches `predicate`
-
-where `statement` is a statement that is expected to cause the process to die,
-`predicate` is a function or function object that evaluates an integer exit
-status, and `matcher` is either a gMock matcher matching a `const std::string&`
-or a (Perl) regular expression - either of which is matched against the stderr
-output of `statement`. For legacy reasons, a bare string (i.e. with no matcher)
-is interpreted as `ContainsRegex(str)`, **not** `Eq(str)`. Note that `statement`
-can be *any valid statement* (including *compound statement*) and doesn't have
-to be an expression.
-
-As usual, the `ASSERT` variants abort the current test function, while the
-`EXPECT` variants do not.
-
-{: .callout .note}
-> NOTE: We use the word "crash" here to mean that the process terminates with a
-> *non-zero* exit status code. There are two possibilities: either the process
-> has called `exit()` or `_exit()` with a non-zero value, or it may be killed by
-> a signal.
->
-> This means that if *`statement`* terminates the process with a 0 exit code, it
-> is *not* considered a crash by `EXPECT_DEATH`. Use `EXPECT_EXIT` instead if
-> this is the case, or if you want to restrict the exit code more precisely.
-
-A predicate here must accept an `int` and return a `bool`. The death test
-succeeds only if the predicate returns `true`. googletest defines a few
-predicates that handle the most common cases:
-
-```c++
-::testing::ExitedWithCode(exit_code)
-```
-
-This expression is `true` if the program exited normally with the given exit
-code.
-
-```c++
-testing::KilledBySignal(signal_number)  // Not available on Windows.
-```
-
-This expression is `true` if the program was killed by the given signal.
-
-The `*_DEATH` macros are convenient wrappers for `*_EXIT` that use a predicate
-that verifies the process' exit code is non-zero.
-
-Note that a death test only cares about three things:
-
-1.  does `statement` abort or exit the process?
-2.  (in the case of `ASSERT_EXIT` and `EXPECT_EXIT`) does the exit status
-    satisfy `predicate`? Or (in the case of `ASSERT_DEATH` and `EXPECT_DEATH`)
-    is the exit status non-zero? And
-3.  does the stderr output match `matcher`?
-
-In particular, if `statement` generates an `ASSERT_*` or `EXPECT_*` failure, it
-will **not** cause the death test to fail, as googletest assertions don't abort
-the process.
-
-To write a death test, simply use one of the above macros inside your test
-function. For example,
-
-```c++
-TEST(MyDeathTest, Foo) {
-  // This death test uses a compound statement.
-  ASSERT_DEATH({
-    int n = 5;
-    Foo(&n);
-  }, "Error on line .* of Foo()");
-}
-
-TEST(MyDeathTest, NormalExit) {
-  EXPECT_EXIT(NormalExit(), testing::ExitedWithCode(0), "Success");
-}
-
-TEST(MyDeathTest, KillMyself) {
-  EXPECT_EXIT(KillMyself(), testing::KilledBySignal(SIGKILL),
-              "Sending myself unblockable signal");
-}
-```
-
-verifies that:
-
-*   calling `Foo(5)` causes the process to die with the given error message,
-*   calling `NormalExit()` causes the process to print `"Success"` to stderr and
-    exit with exit code 0, and
-*   calling `KillMyself()` kills the process with signal `SIGKILL`.
-
-The test function body may contain other assertions and statements as well, if
-necessary.
-
-### Death Test Naming
-
-{: .callout .important}
-IMPORTANT: We strongly recommend you to follow the convention of naming your
-**test suite** (not test) `*DeathTest` when it contains a death test, as
-demonstrated in the above example. The
-[Death Tests And Threads](#death-tests-and-threads) section below explains why.
-
-If a test fixture class is shared by normal tests and death tests, you can use
-`using` or `typedef` to introduce an alias for the fixture class and avoid
-duplicating its code:
-
-```c++
-class FooTest : public testing::Test { ... };
-
-using FooDeathTest = FooTest;
-
-TEST_F(FooTest, DoesThis) {
-  // normal test
-}
-
-TEST_F(FooDeathTest, DoesThat) {
-  // death test
-}
-```
-
-### Regular Expression Syntax
-
-On POSIX systems (e.g. Linux, Cygwin, and Mac), googletest uses the
-[POSIX extended regular expression](http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html#tag_09_04)
-syntax. To learn about this syntax, you may want to read this
-[Wikipedia entry](http://en.wikipedia.org/wiki/Regular_expression#POSIX_Extended_Regular_Expressions).
-
-On Windows, googletest uses its own simple regular expression implementation. It
-lacks many features. For example, we don't support union (`"x|y"`), grouping
-(`"(xy)"`), brackets (`"[xy]"`), and repetition count (`"x{5,7}"`), among
-others. Below is what we do support (`A` denotes a literal character, period
-(`.`), or a single `\\ ` escape sequence; `x` and `y` denote regular
-expressions.):
-
-Expression | Meaning
----------- | --------------------------------------------------------------
-`c`        | matches any literal character `c`
-`\\d`      | matches any decimal digit
-`\\D`      | matches any character that's not a decimal digit
-`\\f`      | matches `\f`
-`\\n`      | matches `\n`
-`\\r`      | matches `\r`
-`\\s`      | matches any ASCII whitespace, including `\n`
-`\\S`      | matches any character that's not a whitespace
-`\\t`      | matches `\t`
-`\\v`      | matches `\v`
-`\\w`      | matches any letter, `_`, or decimal digit
-`\\W`      | matches any character that `\\w` doesn't match
-`\\c`      | matches any literal character `c`, which must be a punctuation
-`.`        | matches any single character except `\n`
-`A?`       | matches 0 or 1 occurrences of `A`
-`A*`       | matches 0 or many occurrences of `A`
-`A+`       | matches 1 or many occurrences of `A`
-`^`        | matches the beginning of a string (not that of each line)
-`$`        | matches the end of a string (not that of each line)
-`xy`       | matches `x` followed by `y`
-
-To help you determine which capability is available on your system, googletest
-defines macros to govern which regular expression it is using. The macros are:
-`GTEST_USES_SIMPLE_RE=1` or `GTEST_USES_POSIX_RE=1`. If you want your death
-tests to work in all cases, you can either `#if` on these macros or use the more
-limited syntax only.
-
-### How It Works
-
-Under the hood, `ASSERT_EXIT()` spawns a new process and executes the death test
-statement in that process. The details of how precisely that happens depend on
-the platform and the variable `::testing::GTEST_FLAG(death_test_style)` (which is
-initialized from the command-line flag `--gtest_death_test_style`).
-
-*   On POSIX systems, `fork()` (or `clone()` on Linux) is used to spawn the
-    child, after which:
-    *   If the variable's value is `"fast"`, the death test statement is
-        immediately executed.
-    *   If the variable's value is `"threadsafe"`, the child process re-executes
-        the unit test binary just as it was originally invoked, but with some
-        extra flags to cause just the single death test under consideration to
-        be run.
-*   On Windows, the child is spawned using the `CreateProcess()` API, and
-    re-executes the binary to cause just the single death test under
-    consideration to be run - much like the `threadsafe` mode on POSIX.
-
-Other values for the variable are illegal and will cause the death test to fail.
-Currently, the flag's default value is
-**`"fast"`**.
-
-1.  the child's exit status satisfies the predicate, and
-2.  the child's stderr matches the regular expression.
-
-If the death test statement runs to completion without dying, the child process
-will nonetheless terminate, and the assertion fails.
-
-### Death Tests And Threads
-
-The reason for the two death test styles has to do with thread safety. Due to
-well-known problems with forking in the presence of threads, death tests should
-be run in a single-threaded context. Sometimes, however, it isn't feasible to
-arrange that kind of environment. For example, statically-initialized modules
-may start threads before main is ever reached. Once threads have been created,
-it may be difficult or impossible to clean them up.
-
-googletest has three features intended to raise awareness of threading issues.
-
-1.  A warning is emitted if multiple threads are running when a death test is
-    encountered.
-2.  Test suites with a name ending in "DeathTest" are run before all other
-    tests.
-3.  It uses `clone()` instead of `fork()` to spawn the child process on Linux
-    (`clone()` is not available on Cygwin and Mac), as `fork()` is more likely
-    to cause the child to hang when the parent process has multiple threads.
-
-It's perfectly fine to create threads inside a death test statement; they are
-executed in a separate process and cannot affect the parent.
-
-### Death Test Styles
-
-The "threadsafe" death test style was introduced in order to help mitigate the
-risks of testing in a possibly multithreaded environment. It trades increased
-test execution time (potentially dramatically so) for improved thread safety.
-
-The automated testing framework does not set the style flag. You can choose a
-particular style of death tests by setting the flag programmatically:
-
-```c++
-testing::FLAGS_gtest_death_test_style="threadsafe"
-```
-
-You can do this in `main()` to set the style for all death tests in the binary,
-or in individual tests. Recall that flags are saved before running each test and
-restored afterwards, so you need not do that yourself. For example:
-
-```c++
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::FLAGS_gtest_death_test_style = "fast";
-  return RUN_ALL_TESTS();
-}
-
-TEST(MyDeathTest, TestOne) {
-  testing::FLAGS_gtest_death_test_style = "threadsafe";
-  // This test is run in the "threadsafe" style:
-  ASSERT_DEATH(ThisShouldDie(), "");
-}
-
-TEST(MyDeathTest, TestTwo) {
-  // This test is run in the "fast" style:
-  ASSERT_DEATH(ThisShouldDie(), "");
-}
-```
-
-### Caveats
-
-The `statement` argument of `ASSERT_EXIT()` can be any valid C++ statement. If
-it leaves the current function via a `return` statement or by throwing an
-exception, the death test is considered to have failed. Some googletest macros
-may return from the current function (e.g. `ASSERT_TRUE()`), so be sure to avoid
-them in `statement`.
-
-Since `statement` runs in the child process, any in-memory side effect (e.g.
-modifying a variable, releasing memory, etc) it causes will *not* be observable
-in the parent process. In particular, if you release memory in a death test,
-your program will fail the heap check as the parent process will never see the
-memory reclaimed. To solve this problem, you can
-
-1.  try not to free memory in a death test;
-2.  free the memory again in the parent process; or
-3.  do not use the heap checker in your program.
-
-Due to an implementation detail, you cannot place multiple death test assertions
-on the same line; otherwise, compilation will fail with an unobvious error
-message.
-
-Despite the improved thread safety afforded by the "threadsafe" style of death
-test, thread problems such as deadlock are still possible in the presence of
-handlers registered with `pthread_atfork(3)`.
-
-
-## Using Assertions in Sub-routines
-
-{: .callout .note}
-Note: If you want to put a series of test assertions in a subroutine to check
-for a complex condition, consider using
-[a custom GMock matcher](gmock_cook_book.md#NewMatchers)
-instead. This lets you provide a more readable error message in case of failure
-and avoid all of the issues described below.
-
-### Adding Traces to Assertions
-
-If a test sub-routine is called from several places, when an assertion inside it
-fails, it can be hard to tell which invocation of the sub-routine the failure is
-from. You can alleviate this problem using extra logging or custom failure
-messages, but that usually clutters up your tests. A better solution is to use
-the `SCOPED_TRACE` macro or the `ScopedTrace` utility:
-
-```c++
-SCOPED_TRACE(message);
-```
-```c++
-ScopedTrace trace("file_path", line_number, message);
-```
-
-where `message` can be anything streamable to `std::ostream`. `SCOPED_TRACE`
-macro will cause the current file name, line number, and the given message to be
-added in every failure message. `ScopedTrace` accepts explicit file name and
-line number in arguments, which is useful for writing test helpers. The effect
-will be undone when the control leaves the current lexical scope.
-
-For example,
-
-```c++
-10: void Sub1(int n) {
-11:   EXPECT_EQ(Bar(n), 1);
-12:   EXPECT_EQ(Bar(n + 1), 2);
-13: }
-14:
-15: TEST(FooTest, Bar) {
-16:   {
-17:     SCOPED_TRACE("A");  // This trace point will be included in
-18:                         // every failure in this scope.
-19:     Sub1(1);
-20:   }
-21:   // Now it won't.
-22:   Sub1(9);
-23: }
-```
-
-could result in messages like these:
-
-```none
-path/to/foo_test.cc:11: Failure
-Value of: Bar(n)
-Expected: 1
-  Actual: 2
-Google Test trace:
-path/to/foo_test.cc:17: A
-
-path/to/foo_test.cc:12: Failure
-Value of: Bar(n + 1)
-Expected: 2
-  Actual: 3
-```
-
-Without the trace, it would've been difficult to know which invocation of
-`Sub1()` the two failures come from respectively. (You could add an extra
-message to each assertion in `Sub1()` to indicate the value of `n`, but that's
-tedious.)
-
-Some tips on using `SCOPED_TRACE`:
-
-1.  With a suitable message, it's often enough to use `SCOPED_TRACE` at the
-    beginning of a sub-routine, instead of at each call site.
-2.  When calling sub-routines inside a loop, make the loop iterator part of the
-    message in `SCOPED_TRACE` such that you can know which iteration the failure
-    is from.
-3.  Sometimes the line number of the trace point is enough for identifying the
-    particular invocation of a sub-routine. In this case, you don't have to
-    choose a unique message for `SCOPED_TRACE`. You can simply use `""`.
-4.  You can use `SCOPED_TRACE` in an inner scope when there is one in the outer
-    scope. In this case, all active trace points will be included in the failure
-    messages, in reverse order they are encountered.
-5.  The trace dump is clickable in Emacs - hit `return` on a line number and
-    you'll be taken to that line in the source file!
-
-### Propagating Fatal Failures
-
-A common pitfall when using `ASSERT_*` and `FAIL*` is not understanding that
-when they fail they only abort the _current function_, not the entire test. For
-example, the following test will segfault:
-
-```c++
-void Subroutine() {
-  // Generates a fatal failure and aborts the current function.
-  ASSERT_EQ(1, 2);
-
-  // The following won't be executed.
-  ...
-}
-
-TEST(FooTest, Bar) {
-  Subroutine();  // The intended behavior is for the fatal failure
-                 // in Subroutine() to abort the entire test.
-
-  // The actual behavior: the function goes on after Subroutine() returns.
-  int* p = nullptr;
-  *p = 3;  // Segfault!
-}
-```
-
-To alleviate this, googletest provides three different solutions. You could use
-either exceptions, the `(ASSERT|EXPECT)_NO_FATAL_FAILURE` assertions or the
-`HasFatalFailure()` function. They are described in the following two
-subsections.
-
-#### Asserting on Subroutines with an exception
-
-The following code can turn ASSERT-failure into an exception:
-
-```c++
-class ThrowListener : public testing::EmptyTestEventListener {
-  void OnTestPartResult(const testing::TestPartResult& result) override {
-    if (result.type() == testing::TestPartResult::kFatalFailure) {
-      throw testing::AssertionException(result);
-    }
-  }
-};
-int main(int argc, char** argv) {
-  ...
-  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
-  return RUN_ALL_TESTS();
-}
-```
-
-This listener should be added after other listeners if you have any, otherwise
-they won't see failed `OnTestPartResult`.
-
-#### Asserting on Subroutines
-
-As shown above, if your test calls a subroutine that has an `ASSERT_*` failure
-in it, the test will continue after the subroutine returns. This may not be what
-you want.
-
-Often people want fatal failures to propagate like exceptions. For that
-googletest offers the following macros:
-
-Fatal assertion                       | Nonfatal assertion                    | Verifies
-------------------------------------- | ------------------------------------- | --------
-`ASSERT_NO_FATAL_FAILURE(statement);` | `EXPECT_NO_FATAL_FAILURE(statement);` | `statement` doesn't generate any new fatal failures in the current thread.
-
-Only failures in the thread that executes the assertion are checked to determine
-the result of this type of assertions. If `statement` creates new threads,
-failures in these threads are ignored.
-
-Examples:
-
-```c++
-ASSERT_NO_FATAL_FAILURE(Foo());
-
-int i;
-EXPECT_NO_FATAL_FAILURE({
-  i = Bar();
-});
-```
-
-Assertions from multiple threads are currently not supported on Windows.
-
-#### Checking for Failures in the Current Test
-
-`HasFatalFailure()` in the `::testing::Test` class returns `true` if an
-assertion in the current test has suffered a fatal failure. This allows
-functions to catch fatal failures in a sub-routine and return early.
-
-```c++
-class Test {
- public:
-  ...
-  static bool HasFatalFailure();
-};
-```
-
-The typical usage, which basically simulates the behavior of a thrown exception,
-is:
-
-```c++
-TEST(FooTest, Bar) {
-  Subroutine();
-  // Aborts if Subroutine() had a fatal failure.
-  if (HasFatalFailure()) return;
-
-  // The following won't be executed.
-  ...
-}
-```
-
-If `HasFatalFailure()` is used outside of `TEST()` , `TEST_F()` , or a test
-fixture, you must add the `::testing::Test::` prefix, as in:
-
-```c++
-if (testing::Test::HasFatalFailure()) return;
-```
-
-Similarly, `HasNonfatalFailure()` returns `true` if the current test has at
-least one non-fatal failure, and `HasFailure()` returns `true` if the current
-test has at least one failure of either kind.
-
-## Logging Additional Information
-
-In your test code, you can call `RecordProperty("key", value)` to log additional
-information, where `value` can be either a string or an `int`. The *last* value
-recorded for a key will be emitted to the
-[XML output](#generating-an-xml-report) if you specify one. For example, the
-test
-
-```c++
-TEST_F(WidgetUsageTest, MinAndMaxWidgets) {
-  RecordProperty("MaximumWidgets", ComputeMaxUsage());
-  RecordProperty("MinimumWidgets", ComputeMinUsage());
-}
-```
-
-will output XML like this:
-
-```xml
-  ...
-    <testcase name="MinAndMaxWidgets" status="run" time="0.006" classname="WidgetUsageTest" MaximumWidgets="12" MinimumWidgets="9" />
-  ...
-```
-
-{: .callout .note}
-> NOTE:
->
-> *   `RecordProperty()` is a static member of the `Test` class. Therefore it
->     needs to be prefixed with `::testing::Test::` if used outside of the
->     `TEST` body and the test fixture class.
-> *   *`key`* must be a valid XML attribute name, and cannot conflict with the
->     ones already used by googletest (`name`, `status`, `time`, `classname`,
->     `type_param`, and `value_param`).
-> *   Calling `RecordProperty()` outside of the lifespan of a test is allowed.
->     If it's called outside of a test but between a test suite's
->     `SetUpTestSuite()` and `TearDownTestSuite()` methods, it will be
->     attributed to the XML element for the test suite. If it's called outside
->     of all test suites (e.g. in a test environment), it will be attributed to
->     the top-level XML element.
-
-## Sharing Resources Between Tests in the Same Test Suite
-
-googletest creates a new test fixture object for each test in order to make
-tests independent and easier to debug. However, sometimes tests use resources
-that are expensive to set up, making the one-copy-per-test model prohibitively
-expensive.
-
-If the tests don't change the resource, there's no harm in their sharing a
-single resource copy. So, in addition to per-test set-up/tear-down, googletest
-also supports per-test-suite set-up/tear-down. To use it:
-
-1.  In your test fixture class (say `FooTest` ), declare as `static` some member
-    variables to hold the shared resources.
-2.  Outside your test fixture class (typically just below it), define those
-    member variables, optionally giving them initial values.
-3.  In the same test fixture class, define a `static void SetUpTestSuite()`
-    function (remember not to spell it as **`SetupTestSuite`** with a small
-    `u`!) to set up the shared resources and a `static void TearDownTestSuite()`
-    function to tear them down.
-
-That's it! googletest automatically calls `SetUpTestSuite()` before running the
-*first test* in the `FooTest` test suite (i.e. before creating the first
-`FooTest` object), and calls `TearDownTestSuite()` after running the *last test*
-in it (i.e. after deleting the last `FooTest` object). In between, the tests can
-use the shared resources.
-
-Remember that the test order is undefined, so your code can't depend on a test
-preceding or following another. Also, the tests must either not modify the state
-of any shared resource, or, if they do modify the state, they must restore the
-state to its original value before passing control to the next test.
-
-Here's an example of per-test-suite set-up and tear-down:
-
-```c++
-class FooTest : public testing::Test {
- protected:
-  // Per-test-suite set-up.
-  // Called before the first test in this test suite.
-  // Can be omitted if not needed.
-  static void SetUpTestSuite() {
-    shared_resource_ = new ...;
-  }
-
-  // Per-test-suite tear-down.
-  // Called after the last test in this test suite.
-  // Can be omitted if not needed.
-  static void TearDownTestSuite() {
-    delete shared_resource_;
-    shared_resource_ = nullptr;
-  }
-
-  // You can define per-test set-up logic as usual.
-  void SetUp() override { ... }
-
-  // You can define per-test tear-down logic as usual.
-  void TearDown() override { ... }
-
-  // Some expensive resource shared by all tests.
-  static T* shared_resource_;
-};
-
-T* FooTest::shared_resource_ = nullptr;
-
-TEST_F(FooTest, Test1) {
-  ... you can refer to shared_resource_ here ...
-}
-
-TEST_F(FooTest, Test2) {
-  ... you can refer to shared_resource_ here ...
-}
-```
-
-{: .callout .note}
-NOTE: Though the above code declares `SetUpTestSuite()` protected, it may
-sometimes be necessary to declare it public, such as when using it with
-`TEST_P`.
-
-## Global Set-Up and Tear-Down
-
-Just as you can do set-up and tear-down at the test level and the test suite
-level, you can also do it at the test program level. Here's how.
-
-First, you subclass the `::testing::Environment` class to define a test
-environment, which knows how to set-up and tear-down:
-
-```c++
-class Environment : public ::testing::Environment {
- public:
-  ~Environment() override {}
-
-  // Override this to define how to set up the environment.
-  void SetUp() override {}
-
-  // Override this to define how to tear down the environment.
-  void TearDown() override {}
-};
-```
-
-Then, you register an instance of your environment class with googletest by
-calling the `::testing::AddGlobalTestEnvironment()` function:
-
-```c++
-Environment* AddGlobalTestEnvironment(Environment* env);
-```
-
-Now, when `RUN_ALL_TESTS()` is called, it first calls the `SetUp()` method of
-each environment object, then runs the tests if none of the environments
-reported fatal failures and `GTEST_SKIP()` was not called. `RUN_ALL_TESTS()`
-always calls `TearDown()` with each environment object, regardless of whether or
-not the tests were run.
-
-It's OK to register multiple environment objects. In this suite, their `SetUp()`
-will be called in the order they are registered, and their `TearDown()` will be
-called in the reverse order.
-
-Note that googletest takes ownership of the registered environment objects.
-Therefore **do not delete them** by yourself.
-
-You should call `AddGlobalTestEnvironment()` before `RUN_ALL_TESTS()` is called,
-probably in `main()`. If you use `gtest_main`, you need to call this before
-`main()` starts for it to take effect. One way to do this is to define a global
-variable like this:
-
-```c++
-testing::Environment* const foo_env =
-    testing::AddGlobalTestEnvironment(new FooEnvironment);
-```
-
-However, we strongly recommend you to write your own `main()` and call
-`AddGlobalTestEnvironment()` there, as relying on initialization of global
-variables makes the code harder to read and may cause problems when you register
-multiple environments from different translation units and the environments have
-dependencies among them (remember that the compiler doesn't guarantee the order
-in which global variables from different translation units are initialized).
-
-## Value-Parameterized Tests
-
-*Value-parameterized tests* allow you to test your code with different
-parameters without writing multiple copies of the same test. This is useful in a
-number of situations, for example:
-
-*   You have a piece of code whose behavior is affected by one or more
-    command-line flags. You want to make sure your code performs correctly for
-    various values of those flags.
-*   You want to test different implementations of an OO interface.
-*   You want to test your code over various inputs (a.k.a. data-driven testing).
-    This feature is easy to abuse, so please exercise your good sense when doing
-    it!
-
-### How to Write Value-Parameterized Tests
-
-To write value-parameterized tests, first you should define a fixture class. It
-must be derived from both `testing::Test` and `testing::WithParamInterface<T>`
-(the latter is a pure interface), where `T` is the type of your parameter
-values. For convenience, you can just derive the fixture class from
-`testing::TestWithParam<T>`, which itself is derived from both `testing::Test`
-and `testing::WithParamInterface<T>`. `T` can be any copyable type. If it's a
-raw pointer, you are responsible for managing the lifespan of the pointed
-values.
-
-{: .callout .note}
-NOTE: If your test fixture defines `SetUpTestSuite()` or `TearDownTestSuite()`
-they must be declared **public** rather than **protected** in order to use
-`TEST_P`.
-
-```c++
-class FooTest :
-    public testing::TestWithParam<const char*> {
-  // You can implement all the usual fixture class members here.
-  // To access the test parameter, call GetParam() from class
-  // TestWithParam<T>.
-};
-
-// Or, when you want to add parameters to a pre-existing fixture class:
-class BaseTest : public testing::Test {
-  ...
-};
-class BarTest : public BaseTest,
-                public testing::WithParamInterface<const char*> {
-  ...
-};
-```
-
-Then, use the `TEST_P` macro to define as many test patterns using this fixture
-as you want. The `_P` suffix is for "parameterized" or "pattern", whichever you
-prefer to think.
-
-```c++
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-```
-
-Finally, you can use `INSTANTIATE_TEST_SUITE_P` to instantiate the test suite
-with any set of parameters you want. googletest defines a number of functions
-for generating test parameters. They return what we call (surprise!) *parameter
-generators*. Here is a summary of them, which are all in the `testing`
-namespace:
-
-
-| Parameter Generator                                                                       | Behavior                                                                                                          |
-| ----------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
-| `Range(begin, end [, step])`                                                              | Yields values `{begin, begin+step, begin+step+step, ...}`. The values do not include `end`. `step` defaults to 1. |
-| `Values(v1, v2, ..., vN)`                                                                 | Yields values `{v1, v2, ..., vN}`.                                                                                |
-| `ValuesIn(container)` and  `ValuesIn(begin,end)`                                          | Yields values from a C-style array, an  STL-style container, or an iterator range `[begin, end)`                  |
-| `Bool()`                                                                                  | Yields sequence `{false, true}`.                                                                                  |
-| `Combine(g1, g2, ..., gN)`                                                                | Yields all combinations (Cartesian product) as std\:\:tuples of the values generated by the `N` generators.       |
-
-
-For more details, see the comments at the definitions of these functions.
-
-The following statement will instantiate tests from the `FooTest` test suite
-each with parameter values `"meeny"`, `"miny"`, and `"moe"`.
-
-```c++
-INSTANTIATE_TEST_SUITE_P(MeenyMinyMoe,
-                         FooTest,
-                         testing::Values("meeny", "miny", "moe"));
-```
-
-{: .callout .note}
-NOTE: The code above must be placed at global or namespace scope, not at
-function scope.
-
-The first argument to `INSTANTIATE_TEST_SUITE_P` is a unique name for the
-instantiation of the test suite. The next argument is the name of the test
-pattern, and the last is the parameter generator.
-
-You can instantiate a test pattern more than once, so to distinguish different
-instances of the pattern, the instantiation name is added as a prefix to the
-actual test suite name. Remember to pick unique prefixes for different
-instantiations. The tests from the instantiation above will have these names:
-
-*   `MeenyMinyMoe/FooTest.DoesBlah/0` for `"meeny"`
-*   `MeenyMinyMoe/FooTest.DoesBlah/1` for `"miny"`
-*   `MeenyMinyMoe/FooTest.DoesBlah/2` for `"moe"`
-*   `MeenyMinyMoe/FooTest.HasBlahBlah/0` for `"meeny"`
-*   `MeenyMinyMoe/FooTest.HasBlahBlah/1` for `"miny"`
-*   `MeenyMinyMoe/FooTest.HasBlahBlah/2` for `"moe"`
-
-You can use these names in [`--gtest_filter`](#running-a-subset-of-the-tests).
-
-The following statement will instantiate all tests from `FooTest` again, each
-with parameter values `"cat"` and `"dog"`:
-
-```c++
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(Pets, FooTest, testing::ValuesIn(pets));
-```
-
-The tests from the instantiation above will have these names:
-
-*   `Pets/FooTest.DoesBlah/0` for `"cat"`
-*   `Pets/FooTest.DoesBlah/1` for `"dog"`
-*   `Pets/FooTest.HasBlahBlah/0` for `"cat"`
-*   `Pets/FooTest.HasBlahBlah/1` for `"dog"`
-
-Please note that `INSTANTIATE_TEST_SUITE_P` will instantiate *all* tests in the
-given test suite, whether their definitions come before or *after* the
-`INSTANTIATE_TEST_SUITE_P` statement.
-
-Additionally, by default, every `TEST_P` without a corresponding
-`INSTANTIATE_TEST_SUITE_P` causes a failing test in test suite
-`GoogleTestVerification`. If you have a test suite where that omission is not an
-error, for example it is in a library that may be linked in for other reasons or
-where the list of test cases is dynamic and may be empty, then this check can be
-suppressed by tagging the test suite:
-
-```c++
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(FooTest);
-```
-
-You can see [sample7_unittest.cc] and [sample8_unittest.cc] for more examples.
-
-[sample7_unittest.cc]: https://github.com/google/googletest/blob/master/googletest/samples/sample7_unittest.cc "Parameterized Test example"
-[sample8_unittest.cc]: https://github.com/google/googletest/blob/master/googletest/samples/sample8_unittest.cc "Parameterized Test example with multiple parameters"
-
-### Creating Value-Parameterized Abstract Tests
-
-In the above, we define and instantiate `FooTest` in the *same* source file.
-Sometimes you may want to define value-parameterized tests in a library and let
-other people instantiate them later. This pattern is known as *abstract tests*.
-As an example of its application, when you are designing an interface you can
-write a standard suite of abstract tests (perhaps using a factory function as
-the test parameter) that all implementations of the interface are expected to
-pass. When someone implements the interface, they can instantiate your suite to
-get all the interface-conformance tests for free.
-
-To define abstract tests, you should organize your code like this:
-
-1.  Put the definition of the parameterized test fixture class (e.g. `FooTest`)
-    in a header file, say `foo_param_test.h`. Think of this as *declaring* your
-    abstract tests.
-2.  Put the `TEST_P` definitions in `foo_param_test.cc`, which includes
-    `foo_param_test.h`. Think of this as *implementing* your abstract tests.
-
-Once they are defined, you can instantiate them by including `foo_param_test.h`,
-invoking `INSTANTIATE_TEST_SUITE_P()`, and depending on the library target that
-contains `foo_param_test.cc`. You can instantiate the same abstract test suite
-multiple times, possibly in different source files.
-
-### Specifying Names for Value-Parameterized Test Parameters
-
-The optional last argument to `INSTANTIATE_TEST_SUITE_P()` allows the user to
-specify a function or functor that generates custom test name suffixes based on
-the test parameters. The function should accept one argument of type
-`testing::TestParamInfo<class ParamType>`, and return `std::string`.
-
-`testing::PrintToStringParamName` is a builtin test suffix generator that
-returns the value of `testing::PrintToString(GetParam())`. It does not work for
-`std::string` or C strings.
-
-{: .callout .note}
-NOTE: test names must be non-empty, unique, and may only contain ASCII
-alphanumeric characters. In particular, they
-[should not contain underscores](faq.md#why-should-test-suite-names-and-test-names-not-contain-underscore)
-
-```c++
-class MyTestSuite : public testing::TestWithParam<int> {};
-
-TEST_P(MyTestSuite, MyTest)
-{
-  std::cout << "Example Test Param: " << GetParam() << std::endl;
-}
-
-INSTANTIATE_TEST_SUITE_P(MyGroup, MyTestSuite, testing::Range(0, 10),
-                         testing::PrintToStringParamName());
-```
-
-Providing a custom functor allows for more control over test parameter name
-generation, especially for types where the automatic conversion does not
-generate helpful parameter names (e.g. strings as demonstrated above). The
-following example illustrates this for multiple parameters, an enumeration type
-and a string, and also demonstrates how to combine generators. It uses a lambda
-for conciseness:
-
-```c++
-enum class MyType { MY_FOO = 0, MY_BAR = 1 };
-
-class MyTestSuite : public testing::TestWithParam<std::tuple<MyType, std::string>> {
-};
-
-INSTANTIATE_TEST_SUITE_P(
-    MyGroup, MyTestSuite,
-    testing::Combine(
-        testing::Values(MyType::MY_FOO, MyType::MY_BAR),
-        testing::Values("A", "B")),
-    [](const testing::TestParamInfo<MyTestSuite::ParamType>& info) {
-      std::string name = absl::StrCat(
-          std::get<0>(info.param) == MyType::MY_FOO ? "Foo" : "Bar",
-          std::get<1>(info.param));
-      absl::c_replace_if(name, [](char c) { return !std::isalnum(c); }, '');
-      return name;
-    });
-```
-
-## Typed Tests
-
-Suppose you have multiple implementations of the same interface and want to make
-sure that all of them satisfy some common requirements. Or, you may have defined
-several types that are supposed to conform to the same "concept" and you want to
-verify it. In both cases, you want the same test logic repeated for different
-types.
-
-While you can write one `TEST` or `TEST_F` for each type you want to test (and
-you may even factor the test logic into a function template that you invoke from
-the `TEST`), it's tedious and doesn't scale: if you want `m` tests over `n`
-types, you'll end up writing `m*n` `TEST`s.
-
-*Typed tests* allow you to repeat the same test logic over a list of types. You
-only need to write the test logic once, although you must know the type list
-when writing typed tests. Here's how you do it:
-
-First, define a fixture class template. It should be parameterized by a type.
-Remember to derive it from `::testing::Test`:
-
-```c++
-template <typename T>
-class FooTest : public testing::Test {
- public:
-  ...
-  using List = std::list<T>;
-  static T shared_;
-  T value_;
-};
-```
-
-Next, associate a list of types with the test suite, which will be repeated for
-each type in the list:
-
-```c++
-using MyTypes = ::testing::Types<char, int, unsigned int>;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-```
-
-The type alias (`using` or `typedef`) is necessary for the `TYPED_TEST_SUITE`
-macro to parse correctly. Otherwise the compiler will think that each comma in
-the type list introduces a new macro argument.
-
-Then, use `TYPED_TEST()` instead of `TEST_F()` to define a typed test for this
-test suite. You can repeat this as many times as you want:
-
-```c++
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the 'TestFixture::'
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the 'typename TestFixture::'
-  // prefix.  The 'typename' is required to satisfy the compiler.
-  typename TestFixture::List values;
-
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-```
-
-You can see [sample6_unittest.cc] for a complete example.
-
-[sample6_unittest.cc]: https://github.com/google/googletest/blob/master/googletest/samples/sample6_unittest.cc "Typed Test example"
-
-## Type-Parameterized Tests
-
-*Type-parameterized tests* are like typed tests, except that they don't require
-you to know the list of types ahead of time. Instead, you can define the test
-logic first and instantiate it with different type lists later. You can even
-instantiate it more than once in the same program.
-
-If you are designing an interface or concept, you can define a suite of
-type-parameterized tests to verify properties that any valid implementation of
-the interface/concept should have. Then, the author of each implementation can
-just instantiate the test suite with their type to verify that it conforms to
-the requirements, without having to write similar tests repeatedly. Here's an
-example:
-
-First, define a fixture class template, as we did with typed tests:
-
-```c++
-template <typename T>
-class FooTest : public testing::Test {
-  ...
-};
-```
-
-Next, declare that you will define a type-parameterized test suite:
-
-```c++
-TYPED_TEST_SUITE_P(FooTest);
-```
-
-Then, use `TYPED_TEST_P()` to define a type-parameterized test. You can repeat
-this as many times as you want:
-
-```c++
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-```
-
-Now the tricky part: you need to register all test patterns using the
-`REGISTER_TYPED_TEST_SUITE_P` macro before you can instantiate them. The first
-argument of the macro is the test suite name; the rest are the names of the
-tests in this test suite:
-
-```c++
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-```
-
-Finally, you are free to instantiate the pattern with the types you want. If you
-put the above code in a header file, you can `#include` it in multiple C++
-source files and instantiate it multiple times.
-
-```c++
-using MyTypes = ::testing::Types<char, int, unsigned int>;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-```
-
-To distinguish different instances of the pattern, the first argument to the
-`INSTANTIATE_TYPED_TEST_SUITE_P` macro is a prefix that will be added to the
-actual test suite name. Remember to pick unique prefixes for different
-instances.
-
-In the special case where the type list contains only one type, you can write
-that type directly without `::testing::Types<...>`, like this:
-
-```c++
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-```
-
-You can see [sample6_unittest.cc] for a complete example.
-
-## Testing Private Code
-
-If you change your software's internal implementation, your tests should not
-break as long as the change is not observable by users. Therefore, **per the
-black-box testing principle, most of the time you should test your code through
-its public interfaces.**
-
-**If you still find yourself needing to test internal implementation code,
-consider if there's a better design.** The desire to test internal
-implementation is often a sign that the class is doing too much. Consider
-extracting an implementation class, and testing it. Then use that implementation
-class in the original class.
-
-If you absolutely have to test non-public interface code though, you can. There
-are two cases to consider:
-
-*   Static functions ( *not* the same as static member functions!) or unnamed
-    namespaces, and
-*   Private or protected class members
-
-To test them, we use the following special techniques:
-
-*   Both static functions and definitions/declarations in an unnamed namespace
-    are only visible within the same translation unit. To test them, you can
-    `#include` the entire `.cc` file being tested in your `*_test.cc` file.
-    (#including `.cc` files is not a good way to reuse code - you should not do
-    this in production code!)
-
-    However, a better approach is to move the private code into the
-    `foo::internal` namespace, where `foo` is the namespace your project
-    normally uses, and put the private declarations in a `*-internal.h` file.
-    Your production `.cc` files and your tests are allowed to include this
-    internal header, but your clients are not. This way, you can fully test your
-    internal implementation without leaking it to your clients.
-
-*   Private class members are only accessible from within the class or by
-    friends. To access a class' private members, you can declare your test
-    fixture as a friend to the class and define accessors in your fixture. Tests
-    using the fixture can then access the private members of your production
-    class via the accessors in the fixture. Note that even though your fixture
-    is a friend to your production class, your tests are not automatically
-    friends to it, as they are technically defined in sub-classes of the
-    fixture.
-
-    Another way to test private members is to refactor them into an
-    implementation class, which is then declared in a `*-internal.h` file. Your
-    clients aren't allowed to include this header but your tests can. Such is
-    called the
-    [Pimpl](https://www.gamedev.net/articles/programming/general-and-gameplay-programming/the-c-pimpl-r1794/)
-    (Private Implementation) idiom.
-
-    Or, you can declare an individual test as a friend of your class by adding
-    this line in the class body:
-
-    ```c++
-        FRIEND_TEST(TestSuiteName, TestName);
-    ```
-
-    For example,
-
-    ```c++
-    // foo.h
-    class Foo {
-      ...
-     private:
-      FRIEND_TEST(FooTest, BarReturnsZeroOnNull);
-
-      int Bar(void* x);
-    };
-
-    // foo_test.cc
-    ...
-    TEST(FooTest, BarReturnsZeroOnNull) {
-      Foo foo;
-      EXPECT_EQ(foo.Bar(NULL), 0);  // Uses Foo's private member Bar().
-    }
-    ```
-
-    Pay special attention when your class is defined in a namespace. If you want
-    your test fixtures and tests to be friends of your class, then they must be
-    defined in the exact same namespace (no anonymous or inline namespaces).
-
-    For example, if the code to be tested looks like:
-
-    ```c++
-    namespace my_namespace {
-
-    class Foo {
-      friend class FooTest;
-      FRIEND_TEST(FooTest, Bar);
-      FRIEND_TEST(FooTest, Baz);
-      ... definition of the class Foo ...
-    };
-
-    }  // namespace my_namespace
-    ```
-
-    Your test code should be something like:
-
-    ```c++
-    namespace my_namespace {
-
-    class FooTest : public testing::Test {
-     protected:
-      ...
-    };
-
-    TEST_F(FooTest, Bar) { ... }
-    TEST_F(FooTest, Baz) { ... }
-
-    }  // namespace my_namespace
-    ```
-
-## "Catching" Failures
-
-If you are building a testing utility on top of googletest, you'll want to test
-your utility. What framework would you use to test it? googletest, of course.
-
-The challenge is to verify that your testing utility reports failures correctly.
-In frameworks that report a failure by throwing an exception, you could catch
-the exception and assert on it. But googletest doesn't use exceptions, so how do
-we test that a piece of code generates an expected failure?
-
-`"gtest/gtest-spi.h"` contains some constructs to do this. After #including this header,
-you can use
-
-```c++
-  EXPECT_FATAL_FAILURE(statement, substring);
-```
-
-to assert that `statement` generates a fatal (e.g. `ASSERT_*`) failure in the
-current thread whose message contains the given `substring`, or use
-
-```c++
-  EXPECT_NONFATAL_FAILURE(statement, substring);
-```
-
-if you are expecting a non-fatal (e.g. `EXPECT_*`) failure.
-
-Only failures in the current thread are checked to determine the result of this
-type of expectations. If `statement` creates new threads, failures in these
-threads are also ignored. If you want to catch failures in other threads as
-well, use one of the following macros instead:
-
-```c++
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substring);
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substring);
-```
-
-{: .callout .note}
-NOTE: Assertions from multiple threads are currently not supported on Windows.
-
-For technical reasons, there are some caveats:
-
-1.  You cannot stream a failure message to either macro.
-
-2.  `statement` in `EXPECT_FATAL_FAILURE{_ON_ALL_THREADS}()` cannot reference
-    local non-static variables or non-static members of `this` object.
-
-3.  `statement` in `EXPECT_FATAL_FAILURE{_ON_ALL_THREADS}()` cannot return a
-    value.
-
-## Registering tests programmatically
-
-The `TEST` macros handle the vast majority of all use cases, but there are few
-where runtime registration logic is required. For those cases, the framework
-provides the `::testing::RegisterTest` that allows callers to register arbitrary
-tests dynamically.
-
-This is an advanced API only to be used when the `TEST` macros are insufficient.
-The macros should be preferred when possible, as they avoid most of the
-complexity of calling this function.
-
-It provides the following signature:
-
-```c++
-template <typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory);
-```
-
-The `factory` argument is a factory callable (move-constructible) object or
-function pointer that creates a new instance of the Test object. It handles
-ownership to the caller. The signature of the callable is `Fixture*()`, where
-`Fixture` is the test fixture class for the test. All tests registered with the
-same `test_suite_name` must return the same fixture type. This is checked at
-runtime.
-
-The framework will infer the fixture class from the factory and will call the
-`SetUpTestSuite` and `TearDownTestSuite` for it.
-
-Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-undefined.
-
-Use case example:
-
-```c++
-class MyFixture : public testing::Test {
- public:
-  // All of these optional, just like in regular macro usage.
-  static void SetUpTestSuite() { ... }
-  static void TearDownTestSuite() { ... }
-  void SetUp() override { ... }
-  void TearDown() override { ... }
-};
-
-class MyTest : public MyFixture {
- public:
-  explicit MyTest(int data) : data_(data) {}
-  void TestBody() override { ... }
-
- private:
-  int data_;
-};
-
-void RegisterMyTests(const std::vector<int>& values) {
-  for (int v : values) {
-    testing::RegisterTest(
-        "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-        std::to_string(v).c_str(),
-        __FILE__, __LINE__,
-        // Important to use the fixture type as the return type here.
-        [=]() -> MyFixture* { return new MyTest(v); });
-  }
-}
-...
-int main(int argc, char** argv) {
-  std::vector<int> values_to_test = LoadValuesFromConfig();
-  RegisterMyTests(values_to_test);
-  ...
-  return RUN_ALL_TESTS();
-}
-```
-## Getting the Current Test's Name
-
-Sometimes a function may need to know the name of the currently running test.
-For example, you may be using the `SetUp()` method of your test fixture to set
-the golden file name based on which test is running. The `::testing::TestInfo`
-class has this information:
-
-```c++
-namespace testing {
-
-class TestInfo {
- public:
-  // Returns the test suite name and the test name, respectively.
-  //
-  // Do NOT delete or free the return value - it's managed by the
-  // TestInfo class.
-  const char* test_suite_name() const;
-  const char* name() const;
-};
-
-}
-```
-
-To obtain a `TestInfo` object for the currently running test, call
-`current_test_info()` on the `UnitTest` singleton object:
-
-```c++
-  // Gets information about the currently running test.
-  // Do NOT delete the returned object - it's managed by the UnitTest class.
-  const testing::TestInfo* const test_info =
-      testing::UnitTest::GetInstance()->current_test_info();
-
-  printf("We are in test %s of test suite %s.\n",
-         test_info->name(),
-         test_info->test_suite_name());
-```
-
-`current_test_info()` returns a null pointer if no test is running. In
-particular, you cannot find the test suite name in `SetUpTestSuite()`,
-`TearDownTestSuite()` (where you know the test suite name implicitly), or
-functions called from them.
-
-## Extending googletest by Handling Test Events
-
-googletest provides an **event listener API** to let you receive notifications
-about the progress of a test program and test failures. The events you can
-listen to include the start and end of the test program, a test suite, or a test
-method, among others. You may use this API to augment or replace the standard
-console output, replace the XML output, or provide a completely different form
-of output, such as a GUI or a database. You can also use test events as
-checkpoints to implement a resource leak checker, for example.
-
-### Defining Event Listeners
-
-To define a event listener, you subclass either testing::TestEventListener or
-testing::EmptyTestEventListener The former is an (abstract) interface, where
-*each pure virtual method can be overridden to handle a test event* (For
-example, when a test starts, the `OnTestStart()` method will be called.). The
-latter provides an empty implementation of all methods in the interface, such
-that a subclass only needs to override the methods it cares about.
-
-When an event is fired, its context is passed to the handler function as an
-argument. The following argument types are used:
-
-*   UnitTest reflects the state of the entire test program,
-*   TestSuite has information about a test suite, which can contain one or more
-    tests,
-*   TestInfo contains the state of a test, and
-*   TestPartResult represents the result of a test assertion.
-
-An event handler function can examine the argument it receives to find out
-interesting information about the event and the test program's state.
-
-Here's an example:
-
-```c++
-  class MinimalistPrinter : public testing::EmptyTestEventListener {
-    // Called before a test starts.
-    void OnTestStart(const testing::TestInfo& test_info) override {
-      printf("*** Test %s.%s starting.\n",
-             test_info.test_suite_name(), test_info.name());
-    }
-
-    // Called after a failed assertion or a SUCCESS().
-    void OnTestPartResult(const testing::TestPartResult& test_part_result) override {
-      printf("%s in %s:%d\n%s\n",
-             test_part_result.failed() ? "*** Failure" : "Success",
-             test_part_result.file_name(),
-             test_part_result.line_number(),
-             test_part_result.summary());
-    }
-
-    // Called after a test ends.
-    void OnTestEnd(const testing::TestInfo& test_info) override {
-      printf("*** Test %s.%s ending.\n",
-             test_info.test_suite_name(), test_info.name());
-    }
-  };
-```
-
-### Using Event Listeners
-
-To use the event listener you have defined, add an instance of it to the
-googletest event listener list (represented by class TestEventListeners - note
-the "s" at the end of the name) in your `main()` function, before calling
-`RUN_ALL_TESTS()`:
-
-```c++
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  // Gets hold of the event listener list.
-  testing::TestEventListeners& listeners =
-      testing::UnitTest::GetInstance()->listeners();
-  // Adds a listener to the end.  googletest takes the ownership.
-  listeners.Append(new MinimalistPrinter);
-  return RUN_ALL_TESTS();
-}
-```
-
-There's only one problem: the default test result printer is still in effect, so
-its output will mingle with the output from your minimalist printer. To suppress
-the default printer, just release it from the event listener list and delete it.
-You can do so by adding one line:
-
-```c++
-  ...
-  delete listeners.Release(listeners.default_result_printer());
-  listeners.Append(new MinimalistPrinter);
-  return RUN_ALL_TESTS();
-```
-
-Now, sit back and enjoy a completely different output from your tests. For more
-details, see [sample9_unittest.cc].
-
-[sample9_unittest.cc]: https://github.com/google/googletest/blob/master/googletest/samples/sample9_unittest.cc "Event listener example"
-
-You may append more than one listener to the list. When an `On*Start()` or
-`OnTestPartResult()` event is fired, the listeners will receive it in the order
-they appear in the list (since new listeners are added to the end of the list,
-the default text printer and the default XML generator will receive the event
-first). An `On*End()` event will be received by the listeners in the *reverse*
-order. This allows output by listeners added later to be framed by output from
-listeners added earlier.
-
-### Generating Failures in Listeners
-
-You may use failure-raising macros (`EXPECT_*()`, `ASSERT_*()`, `FAIL()`, etc)
-when processing an event. There are some restrictions:
-
-1.  You cannot generate any failure in `OnTestPartResult()` (otherwise it will
-    cause `OnTestPartResult()` to be called recursively).
-2.  A listener that handles `OnTestPartResult()` is not allowed to generate any
-    failure.
-
-When you add listeners to the listener list, you should put listeners that
-handle `OnTestPartResult()` *before* listeners that can generate failures. This
-ensures that failures generated by the latter are attributed to the right test
-by the former.
-
-See [sample10_unittest.cc] for an example of a failure-raising listener.
-
-[sample10_unittest.cc]: https://github.com/google/googletest/blob/master/googletest/samples/sample10_unittest.cc "Failure-raising listener example"
-
-## Running Test Programs: Advanced Options
-
-googletest test programs are ordinary executables. Once built, you can run them
-directly and affect their behavior via the following environment variables
-and/or command line flags. For the flags to work, your programs must call
-`::testing::InitGoogleTest()` before calling `RUN_ALL_TESTS()`.
-
-To see a list of supported flags and their usage, please run your test program
-with the `--help` flag. You can also use `-h`, `-?`, or `/?` for short.
-
-If an option is specified both by an environment variable and by a flag, the
-latter takes precedence.
-
-### Selecting Tests
-
-#### Listing Test Names
-
-Sometimes it is necessary to list the available tests in a program before
-running them so that a filter may be applied if needed. Including the flag
-`--gtest_list_tests` overrides all other flags and lists tests in the following
-format:
-
-```none
-TestSuite1.
-  TestName1
-  TestName2
-TestSuite2.
-  TestName
-```
-
-None of the tests listed are actually run if the flag is provided. There is no
-corresponding environment variable for this flag.
-
-#### Running a Subset of the Tests
-
-By default, a googletest program runs all tests the user has defined. Sometimes,
-you want to run only a subset of the tests (e.g. for debugging or quickly
-verifying a change). If you set the `GTEST_FILTER` environment variable or the
-`--gtest_filter` flag to a filter string, googletest will only run the tests
-whose full names (in the form of `TestSuiteName.TestName`) match the filter.
-
-The format of a filter is a '`:`'-separated list of wildcard patterns (called
-the *positive patterns*) optionally followed by a '`-`' and another
-'`:`'-separated pattern list (called the *negative patterns*). A test matches
-the filter if and only if it matches any of the positive patterns but does not
-match any of the negative patterns.
-
-A pattern may contain `'*'` (matches any string) or `'?'` (matches any single
-character). For convenience, the filter `'*-NegativePatterns'` can be also
-written as `'-NegativePatterns'`.
-
-For example:
-
-*   `./foo_test` Has no flag, and thus runs all its tests.
-*   `./foo_test --gtest_filter=*` Also runs everything, due to the single
-    match-everything `*` value.
-*   `./foo_test --gtest_filter=FooTest.*` Runs everything in test suite
-    `FooTest` .
-*   `./foo_test --gtest_filter=*Null*:*Constructor*` Runs any test whose full
-    name contains either `"Null"` or `"Constructor"` .
-*   `./foo_test --gtest_filter=-*DeathTest.*` Runs all non-death tests.
-*   `./foo_test --gtest_filter=FooTest.*-FooTest.Bar` Runs everything in test
-    suite `FooTest` except `FooTest.Bar`.
-*   `./foo_test --gtest_filter=FooTest.*:BarTest.*-FooTest.Bar:BarTest.Foo` Runs
-    everything in test suite `FooTest` except `FooTest.Bar` and everything in
-    test suite `BarTest` except `BarTest.Foo`.
-
-#### Stop test execution upon first failure
-
-By default, a googletest program runs all tests the user has defined. In some
-cases (e.g. iterative test development & execution) it may be desirable stop
-test execution upon first failure (trading improved latency for completeness).
-If `GTEST_FAIL_FAST` environment variable or `--gtest_fail_fast` flag is set,
-the test runner will stop execution as soon as the first test failure is
-found.
-
-#### Temporarily Disabling Tests
-
-If you have a broken test that you cannot fix right away, you can add the
-`DISABLED_` prefix to its name. This will exclude it from execution. This is
-better than commenting out the code or using `#if 0`, as disabled tests are
-still compiled (and thus won't rot).
-
-If you need to disable all tests in a test suite, you can either add `DISABLED_`
-to the front of the name of each test, or alternatively add it to the front of
-the test suite name.
-
-For example, the following tests won't be run by googletest, even though they
-will still be compiled:
-
-```c++
-// Tests that Foo does Abc.
-TEST(FooTest, DISABLED_DoesAbc) { ... }
-
-class DISABLED_BarTest : public testing::Test { ... };
-
-// Tests that Bar does Xyz.
-TEST_F(DISABLED_BarTest, DoesXyz) { ... }
-```
-
-{: .callout .note}
-NOTE: This feature should only be used for temporary pain-relief. You still have
-to fix the disabled tests at a later date. As a reminder, googletest will print
-a banner warning you if a test program contains any disabled tests.
-
-{: .callout .tip}
-TIP: You can easily count the number of disabled tests you have using
-`grep`. This number can be used as a metric for
-improving your test quality.
-
-#### Temporarily Enabling Disabled Tests
-
-To include disabled tests in test execution, just invoke the test program with
-the `--gtest_also_run_disabled_tests` flag or set the
-`GTEST_ALSO_RUN_DISABLED_TESTS` environment variable to a value other than `0`.
-You can combine this with the `--gtest_filter` flag to further select which
-disabled tests to run.
-
-### Repeating the Tests
-
-Once in a while you'll run into a test whose result is hit-or-miss. Perhaps it
-will fail only 1% of the time, making it rather hard to reproduce the bug under
-a debugger. This can be a major source of frustration.
-
-The `--gtest_repeat` flag allows you to repeat all (or selected) test methods in
-a program many times. Hopefully, a flaky test will eventually fail and give you
-a chance to debug. Here's how to use it:
-
-```none
-$ foo_test --gtest_repeat=1000
-Repeat foo_test 1000 times and don't stop at failures.
-
-$ foo_test --gtest_repeat=-1
-A negative count means repeating forever.
-
-$ foo_test --gtest_repeat=1000 --gtest_break_on_failure
-Repeat foo_test 1000 times, stopping at the first failure.  This
-is especially useful when running under a debugger: when the test
-fails, it will drop into the debugger and you can then inspect
-variables and stacks.
-
-$ foo_test --gtest_repeat=1000 --gtest_filter=FooBar.*
-Repeat the tests whose name matches the filter 1000 times.
-```
-
-If your test program contains
-[global set-up/tear-down](#global-set-up-and-tear-down) code, it will be
-repeated in each iteration as well, as the flakiness may be in it. You can also
-specify the repeat count by setting the `GTEST_REPEAT` environment variable.
-
-### Shuffling the Tests
-
-You can specify the `--gtest_shuffle` flag (or set the `GTEST_SHUFFLE`
-environment variable to `1`) to run the tests in a program in a random order.
-This helps to reveal bad dependencies between tests.
-
-By default, googletest uses a random seed calculated from the current time.
-Therefore you'll get a different order every time. The console output includes
-the random seed value, such that you can reproduce an order-related test failure
-later. To specify the random seed explicitly, use the `--gtest_random_seed=SEED`
-flag (or set the `GTEST_RANDOM_SEED` environment variable), where `SEED` is an
-integer in the range [0, 99999]. The seed value 0 is special: it tells
-googletest to do the default behavior of calculating the seed from the current
-time.
-
-If you combine this with `--gtest_repeat=N`, googletest will pick a different
-random seed and re-shuffle the tests in each iteration.
-
-### Controlling Test Output
-
-#### Colored Terminal Output
-
-googletest can use colors in its terminal output to make it easier to spot the
-important information:
-
-<pre>...
-<font color="green">[----------]</font> 1 test from FooTest
-<font color="green">[ RUN      ]</font> FooTest.DoesAbc
-<font color="green">[       OK ]</font> FooTest.DoesAbc
-<font color="green">[----------]</font> 2 tests from BarTest
-<font color="green">[ RUN      ]</font> BarTest.HasXyzProperty
-<font color="green">[       OK ]</font> BarTest.HasXyzProperty
-<font color="green">[ RUN      ]</font> BarTest.ReturnsTrueOnSuccess
-... some error messages ...
-<font color="red">[   FAILED ]</font> BarTest.ReturnsTrueOnSuccess
-...
-<font color="green">[==========]</font> 30 tests from 14 test suites ran.
-<font color="green">[   PASSED ]</font> 28 tests.
-<font color="red">[   FAILED ]</font> 2 tests, listed below:
-<font color="red">[   FAILED ]</font> BarTest.ReturnsTrueOnSuccess
-<font color="red">[   FAILED ]</font> AnotherTest.DoesXyz
-
- 2 FAILED TESTS
-</pre>
-
-You can set the `GTEST_COLOR` environment variable or the `--gtest_color`
-command line flag to `yes`, `no`, or `auto` (the default) to enable colors,
-disable colors, or let googletest decide. When the value is `auto`, googletest
-will use colors if and only if the output goes to a terminal and (on non-Windows
-platforms) the `TERM` environment variable is set to `xterm` or `xterm-color`.
-
-#### Suppressing test passes
-
-By default, googletest prints 1 line of output for each test, indicating if it
-passed or failed. To show only test failures, run the test program with
-`--gtest_brief=1`, or set the GTEST_BRIEF environment variable to `1`.
-
-#### Suppressing the Elapsed Time
-
-By default, googletest prints the time it takes to run each test. To disable
-that, run the test program with the `--gtest_print_time=0` command line flag, or
-set the GTEST_PRINT_TIME environment variable to `0`.
-
-#### Suppressing UTF-8 Text Output
-
-In case of assertion failures, googletest prints expected and actual values of
-type `string` both as hex-encoded strings as well as in readable UTF-8 text if
-they contain valid non-ASCII UTF-8 characters. If you want to suppress the UTF-8
-text because, for example, you don't have an UTF-8 compatible output medium, run
-the test program with `--gtest_print_utf8=0` or set the `GTEST_PRINT_UTF8`
-environment variable to `0`.
-
-
-
-#### Generating an XML Report
-
-googletest can emit a detailed XML report to a file in addition to its normal
-textual output. The report contains the duration of each test, and thus can help
-you identify slow tests.
-
-To generate the XML report, set the `GTEST_OUTPUT` environment variable or the
-`--gtest_output` flag to the string `"xml:path_to_output_file"`, which will
-create the file at the given location. You can also just use the string `"xml"`,
-in which case the output can be found in the `test_detail.xml` file in the
-current directory.
-
-If you specify a directory (for example, `"xml:output/directory/"` on Linux or
-`"xml:output\directory\"` on Windows), googletest will create the XML file in
-that directory, named after the test executable (e.g. `foo_test.xml` for test
-program `foo_test` or `foo_test.exe`). If the file already exists (perhaps left
-over from a previous run), googletest will pick a different name (e.g.
-`foo_test_1.xml`) to avoid overwriting it.
-
-The report is based on the `junitreport` Ant task. Since that format was
-originally intended for Java, a little interpretation is required to make it
-apply to googletest tests, as shown here:
-
-```xml
-<testsuites name="AllTests" ...>
-  <testsuite name="test_case_name" ...>
-    <testcase    name="test_name" ...>
-      <failure message="..."/>
-      <failure message="..."/>
-      <failure message="..."/>
-    </testcase>
-  </testsuite>
-</testsuites>
-```
-
-*   The root `<testsuites>` element corresponds to the entire test program.
-*   `<testsuite>` elements correspond to googletest test suites.
-*   `<testcase>` elements correspond to googletest test functions.
-
-For instance, the following program
-
-```c++
-TEST(MathTest, Addition) { ... }
-TEST(MathTest, Subtraction) { ... }
-TEST(LogicTest, NonContradiction) { ... }
-```
-
-could generate this report:
-
-```xml
-<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="3" failures="1" errors="0" time="0.035" timestamp="2011-10-31T18:52:42" name="AllTests">
-  <testsuite name="MathTest" tests="2" failures="1" errors="0" time="0.015">
-    <testcase name="Addition" status="run" time="0.007" classname="">
-      <failure message="Value of: add(1, 1)&#x0A;  Actual: 3&#x0A;Expected: 2" type="">...</failure>
-      <failure message="Value of: add(1, -1)&#x0A;  Actual: 1&#x0A;Expected: 0" type="">...</failure>
-    </testcase>
-    <testcase name="Subtraction" status="run" time="0.005" classname="">
-    </testcase>
-  </testsuite>
-  <testsuite name="LogicTest" tests="1" failures="0" errors="0" time="0.005">
-    <testcase name="NonContradiction" status="run" time="0.005" classname="">
-    </testcase>
-  </testsuite>
-</testsuites>
-```
-
-Things to note:
-
-*   The `tests` attribute of a `<testsuites>` or `<testsuite>` element tells how
-    many test functions the googletest program or test suite contains, while the
-    `failures` attribute tells how many of them failed.
-
-*   The `time` attribute expresses the duration of the test, test suite, or
-    entire test program in seconds.
-
-*   The `timestamp` attribute records the local date and time of the test
-    execution.
-
-*   Each `<failure>` element corresponds to a single failed googletest
-    assertion.
-
-#### Generating a JSON Report
-
-googletest can also emit a JSON report as an alternative format to XML. To
-generate the JSON report, set the `GTEST_OUTPUT` environment variable or the
-`--gtest_output` flag to the string `"json:path_to_output_file"`, which will
-create the file at the given location. You can also just use the string
-`"json"`, in which case the output can be found in the `test_detail.json` file
-in the current directory.
-
-The report format conforms to the following JSON Schema:
-
-```json
-{
-  "$schema": "http://json-schema.org/schema#",
-  "type": "object",
-  "definitions": {
-    "TestCase": {
-      "type": "object",
-      "properties": {
-        "name": { "type": "string" },
-        "tests": { "type": "integer" },
-        "failures": { "type": "integer" },
-        "disabled": { "type": "integer" },
-        "time": { "type": "string" },
-        "testsuite": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/TestInfo"
-          }
-        }
-      }
-    },
-    "TestInfo": {
-      "type": "object",
-      "properties": {
-        "name": { "type": "string" },
-        "status": {
-          "type": "string",
-          "enum": ["RUN", "NOTRUN"]
-        },
-        "time": { "type": "string" },
-        "classname": { "type": "string" },
-        "failures": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/Failure"
-          }
-        }
-      }
-    },
-    "Failure": {
-      "type": "object",
-      "properties": {
-        "failures": { "type": "string" },
-        "type": { "type": "string" }
-      }
-    }
-  },
-  "properties": {
-    "tests": { "type": "integer" },
-    "failures": { "type": "integer" },
-    "disabled": { "type": "integer" },
-    "errors": { "type": "integer" },
-    "timestamp": {
-      "type": "string",
-      "format": "date-time"
-    },
-    "time": { "type": "string" },
-    "name": { "type": "string" },
-    "testsuites": {
-      "type": "array",
-      "items": {
-        "$ref": "#/definitions/TestCase"
-      }
-    }
-  }
-}
-```
-
-The report uses the format that conforms to the following Proto3 using the
-[JSON encoding](https://developers.google.com/protocol-buffers/docs/proto3#json):
-
-```proto
-syntax = "proto3";
-
-package googletest;
-
-import "google/protobuf/timestamp.proto";
-import "google/protobuf/duration.proto";
-
-message UnitTest {
-  int32 tests = 1;
-  int32 failures = 2;
-  int32 disabled = 3;
-  int32 errors = 4;
-  google.protobuf.Timestamp timestamp = 5;
-  google.protobuf.Duration time = 6;
-  string name = 7;
-  repeated TestCase testsuites = 8;
-}
-
-message TestCase {
-  string name = 1;
-  int32 tests = 2;
-  int32 failures = 3;
-  int32 disabled = 4;
-  int32 errors = 5;
-  google.protobuf.Duration time = 6;
-  repeated TestInfo testsuite = 7;
-}
-
-message TestInfo {
-  string name = 1;
-  enum Status {
-    RUN = 0;
-    NOTRUN = 1;
-  }
-  Status status = 2;
-  google.protobuf.Duration time = 3;
-  string classname = 4;
-  message Failure {
-    string failures = 1;
-    string type = 2;
-  }
-  repeated Failure failures = 5;
-}
-```
-
-For instance, the following program
-
-```c++
-TEST(MathTest, Addition) { ... }
-TEST(MathTest, Subtraction) { ... }
-TEST(LogicTest, NonContradiction) { ... }
-```
-
-could generate this report:
-
-```json
-{
-  "tests": 3,
-  "failures": 1,
-  "errors": 0,
-  "time": "0.035s",
-  "timestamp": "2011-10-31T18:52:42Z",
-  "name": "AllTests",
-  "testsuites": [
-    {
-      "name": "MathTest",
-      "tests": 2,
-      "failures": 1,
-      "errors": 0,
-      "time": "0.015s",
-      "testsuite": [
-        {
-          "name": "Addition",
-          "status": "RUN",
-          "time": "0.007s",
-          "classname": "",
-          "failures": [
-            {
-              "message": "Value of: add(1, 1)\n  Actual: 3\nExpected: 2",
-              "type": ""
-            },
-            {
-              "message": "Value of: add(1, -1)\n  Actual: 1\nExpected: 0",
-              "type": ""
-            }
-          ]
-        },
-        {
-          "name": "Subtraction",
-          "status": "RUN",
-          "time": "0.005s",
-          "classname": ""
-        }
-      ]
-    },
-    {
-      "name": "LogicTest",
-      "tests": 1,
-      "failures": 0,
-      "errors": 0,
-      "time": "0.005s",
-      "testsuite": [
-        {
-          "name": "NonContradiction",
-          "status": "RUN",
-          "time": "0.005s",
-          "classname": ""
-        }
-      ]
-    }
-  ]
-}
-```
-
-{: .callout .important}
-IMPORTANT: The exact format of the JSON document is subject to change.
-
-### Controlling How Failures Are Reported
-
-#### Detecting Test Premature Exit
-
-Google Test implements the _premature-exit-file_ protocol for test runners
-to catch any kind of unexpected exits of test programs. Upon start,
-Google Test creates the file which will be automatically deleted after
-all work has been finished. Then, the test runner can check if this file
-exists. In case the file remains undeleted, the inspected test has exited
-prematurely.
-
-This feature is enabled only if the `TEST_PREMATURE_EXIT_FILE` environment
-variable has been set.
-
-#### Turning Assertion Failures into Break-Points
-
-When running test programs under a debugger, it's very convenient if the
-debugger can catch an assertion failure and automatically drop into interactive
-mode. googletest's *break-on-failure* mode supports this behavior.
-
-To enable it, set the `GTEST_BREAK_ON_FAILURE` environment variable to a value
-other than `0`. Alternatively, you can use the `--gtest_break_on_failure`
-command line flag.
-
-#### Disabling Catching Test-Thrown Exceptions
-
-googletest can be used either with or without exceptions enabled. If a test
-throws a C++ exception or (on Windows) a structured exception (SEH), by default
-googletest catches it, reports it as a test failure, and continues with the next
-test method. This maximizes the coverage of a test run. Also, on Windows an
-uncaught exception will cause a pop-up window, so catching the exceptions allows
-you to run the tests automatically.
-
-When debugging the test failures, however, you may instead want the exceptions
-to be handled by the debugger, such that you can examine the call stack when an
-exception is thrown. To achieve that, set the `GTEST_CATCH_EXCEPTIONS`
-environment variable to `0`, or use the `--gtest_catch_exceptions=0` flag when
-running the tests.
-
-### Sanitizer Integration
-
-The
-[Undefined Behavior Sanitizer](https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html),
-[Address Sanitizer](https://github.com/google/sanitizers/wiki/AddressSanitizer),
-and
-[Thread Sanitizer](https://github.com/google/sanitizers/wiki/ThreadSanitizerCppManual)
-all provide weak functions that you can override to trigger explicit failures
-when they detect sanitizer errors, such as creating a reference from `nullptr`.
-To override these functions, place definitions for them in a source file that
-you compile as part of your main binary:
-
-```
-extern "C" {
-void __ubsan_on_report() {
-  FAIL() << "Encountered an undefined behavior sanitizer error";
-}
-void __asan_on_error() {
-  FAIL() << "Encountered an address sanitizer error";
-}
-void __tsan_on_report() {
-  FAIL() << "Encountered a thread sanitizer error";
-}
-}  // extern "C"
-```
-
-After compiling your project with one of the sanitizers enabled, if a particular
-test triggers a sanitizer error, googletest will report that it failed.
diff --git a/third_party/googletest/docs/assets/css/style.scss b/third_party/googletest/docs/assets/css/style.scss
deleted file mode 100644
index bb30f41..0000000
--- a/third_party/googletest/docs/assets/css/style.scss
+++ /dev/null
@@ -1,5 +0,0 @@
----
----
-
-@import "jekyll-theme-primer";
-@import "main";
diff --git a/third_party/googletest/docs/community_created_documentation.md b/third_party/googletest/docs/community_created_documentation.md
deleted file mode 100644
index 4569075..0000000
--- a/third_party/googletest/docs/community_created_documentation.md
+++ /dev/null
@@ -1,7 +0,0 @@
-# Community-Created Documentation
-
-The following is a list, in no particular order, of links to documentation
-created by the Googletest community.
-
-*   [Googlemock Insights](https://github.com/ElectricRCAircraftGuy/eRCaGuy_dotfiles/blob/master/googletest/insights.md),
-    by [ElectricRCAircraftGuy](https://github.com/ElectricRCAircraftGuy)
diff --git a/third_party/googletest/docs/faq.md b/third_party/googletest/docs/faq.md
deleted file mode 100644
index 4071232..0000000
--- a/third_party/googletest/docs/faq.md
+++ /dev/null
@@ -1,756 +0,0 @@
-# Googletest FAQ
-
-## Why should test suite names and test names not contain underscore?
-
-{: .callout .note}
-Note: Googletest reserves underscore (`_`) for special purpose keywords, such as
-[the `DISABLED_` prefix](advanced.md#temporarily-disabling-tests), in addition
-to the following rationale.
-
-Underscore (`_`) is special, as C++ reserves the following to be used by the
-compiler and the standard library:
-
-1.  any identifier that starts with an `_` followed by an upper-case letter, and
-2.  any identifier that contains two consecutive underscores (i.e. `__`)
-    *anywhere* in its name.
-
-User code is *prohibited* from using such identifiers.
-
-Now let's look at what this means for `TEST` and `TEST_F`.
-
-Currently `TEST(TestSuiteName, TestName)` generates a class named
-`TestSuiteName_TestName_Test`. What happens if `TestSuiteName` or `TestName`
-contains `_`?
-
-1.  If `TestSuiteName` starts with an `_` followed by an upper-case letter (say,
-    `_Foo`), we end up with `_Foo_TestName_Test`, which is reserved and thus
-    invalid.
-2.  If `TestSuiteName` ends with an `_` (say, `Foo_`), we get
-    `Foo__TestName_Test`, which is invalid.
-3.  If `TestName` starts with an `_` (say, `_Bar`), we get
-    `TestSuiteName__Bar_Test`, which is invalid.
-4.  If `TestName` ends with an `_` (say, `Bar_`), we get
-    `TestSuiteName_Bar__Test`, which is invalid.
-
-So clearly `TestSuiteName` and `TestName` cannot start or end with `_`
-(Actually, `TestSuiteName` can start with `_` -- as long as the `_` isn't
-followed by an upper-case letter. But that's getting complicated. So for
-simplicity we just say that it cannot start with `_`.).
-
-It may seem fine for `TestSuiteName` and `TestName` to contain `_` in the
-middle. However, consider this:
-
-```c++
-TEST(Time, Flies_Like_An_Arrow) { ... }
-TEST(Time_Flies, Like_An_Arrow) { ... }
-```
-
-Now, the two `TEST`s will both generate the same class
-(`Time_Flies_Like_An_Arrow_Test`). That's not good.
-
-So for simplicity, we just ask the users to avoid `_` in `TestSuiteName` and
-`TestName`. The rule is more constraining than necessary, but it's simple and
-easy to remember. It also gives googletest some wiggle room in case its
-implementation needs to change in the future.
-
-If you violate the rule, there may not be immediate consequences, but your test
-may (just may) break with a new compiler (or a new version of the compiler you
-are using) or with a new version of googletest. Therefore it's best to follow
-the rule.
-
-## Why does googletest support `EXPECT_EQ(NULL, ptr)` and `ASSERT_EQ(NULL, ptr)` but not `EXPECT_NE(NULL, ptr)` and `ASSERT_NE(NULL, ptr)`?
-
-First of all, you can use `nullptr` with each of these macros, e.g.
-`EXPECT_EQ(ptr, nullptr)`, `EXPECT_NE(ptr, nullptr)`, `ASSERT_EQ(ptr, nullptr)`,
-`ASSERT_NE(ptr, nullptr)`. This is the preferred syntax in the style guide
-because `nullptr` does not have the type problems that `NULL` does.
-
-Due to some peculiarity of C++, it requires some non-trivial template meta
-programming tricks to support using `NULL` as an argument of the `EXPECT_XX()`
-and `ASSERT_XX()` macros. Therefore we only do it where it's most needed
-(otherwise we make the implementation of googletest harder to maintain and more
-error-prone than necessary).
-
-Historically, the `EXPECT_EQ()` macro took the *expected* value as its first
-argument and the *actual* value as the second, though this argument order is now
-discouraged. It was reasonable that someone wanted
-to write `EXPECT_EQ(NULL, some_expression)`, and this indeed was requested
-several times. Therefore we implemented it.
-
-The need for `EXPECT_NE(NULL, ptr)` wasn't nearly as strong. When the assertion
-fails, you already know that `ptr` must be `NULL`, so it doesn't add any
-information to print `ptr` in this case. That means `EXPECT_TRUE(ptr != NULL)`
-works just as well.
-
-If we were to support `EXPECT_NE(NULL, ptr)`, for consistency we'd have to
-support `EXPECT_NE(ptr, NULL)` as well. This means using the template meta
-programming tricks twice in the implementation, making it even harder to
-understand and maintain. We believe the benefit doesn't justify the cost.
-
-Finally, with the growth of the gMock matcher library, we are encouraging people
-to use the unified `EXPECT_THAT(value, matcher)` syntax more often in tests. One
-significant advantage of the matcher approach is that matchers can be easily
-combined to form new matchers, while the `EXPECT_NE`, etc, macros cannot be
-easily combined. Therefore we want to invest more in the matchers than in the
-`EXPECT_XX()` macros.
-
-## I need to test that different implementations of an interface satisfy some common requirements. Should I use typed tests or value-parameterized tests?
-
-For testing various implementations of the same interface, either typed tests or
-value-parameterized tests can get it done. It's really up to you the user to
-decide which is more convenient for you, depending on your particular case. Some
-rough guidelines:
-
-*   Typed tests can be easier to write if instances of the different
-    implementations can be created the same way, modulo the type. For example,
-    if all these implementations have a public default constructor (such that
-    you can write `new TypeParam`), or if their factory functions have the same
-    form (e.g. `CreateInstance<TypeParam>()`).
-*   Value-parameterized tests can be easier to write if you need different code
-    patterns to create different implementations' instances, e.g. `new Foo` vs
-    `new Bar(5)`. To accommodate for the differences, you can write factory
-    function wrappers and pass these function pointers to the tests as their
-    parameters.
-*   When a typed test fails, the default output includes the name of the type,
-    which can help you quickly identify which implementation is wrong.
-    Value-parameterized tests only show the number of the failed iteration by
-    default. You will need to define a function that returns the iteration name
-    and pass it as the third parameter to INSTANTIATE_TEST_SUITE_P to have more
-    useful output.
-*   When using typed tests, you need to make sure you are testing against the
-    interface type, not the concrete types (in other words, you want to make
-    sure `implicit_cast<MyInterface*>(my_concrete_impl)` works, not just that
-    `my_concrete_impl` works). It's less likely to make mistakes in this area
-    when using value-parameterized tests.
-
-I hope I didn't confuse you more. :-) If you don't mind, I'd suggest you to give
-both approaches a try. Practice is a much better way to grasp the subtle
-differences between the two tools. Once you have some concrete experience, you
-can much more easily decide which one to use the next time.
-
-## I got some run-time errors about invalid proto descriptors when using `ProtocolMessageEquals`. Help!
-
-{: .callout .note}
-**Note:** `ProtocolMessageEquals` and `ProtocolMessageEquiv` are *deprecated*
-now. Please use `EqualsProto`, etc instead.
-
-`ProtocolMessageEquals` and `ProtocolMessageEquiv` were redefined recently and
-are now less tolerant of invalid protocol buffer definitions. In particular, if
-you have a `foo.proto` that doesn't fully qualify the type of a protocol message
-it references (e.g. `message<Bar>` where it should be `message<blah.Bar>`), you
-will now get run-time errors like:
-
-```
-... descriptor.cc:...] Invalid proto descriptor for file "path/to/foo.proto":
-... descriptor.cc:...]  blah.MyMessage.my_field: ".Bar" is not defined.
-```
-
-If you see this, your `.proto` file is broken and needs to be fixed by making
-the types fully qualified. The new definition of `ProtocolMessageEquals` and
-`ProtocolMessageEquiv` just happen to reveal your bug.
-
-## My death test modifies some state, but the change seems lost after the death test finishes. Why?
-
-Death tests (`EXPECT_DEATH`, etc) are executed in a sub-process s.t. the
-expected crash won't kill the test program (i.e. the parent process). As a
-result, any in-memory side effects they incur are observable in their respective
-sub-processes, but not in the parent process. You can think of them as running
-in a parallel universe, more or less.
-
-In particular, if you use mocking and the death test statement invokes some mock
-methods, the parent process will think the calls have never occurred. Therefore,
-you may want to move your `EXPECT_CALL` statements inside the `EXPECT_DEATH`
-macro.
-
-## EXPECT_EQ(htonl(blah), blah_blah) generates weird compiler errors in opt mode. Is this a googletest bug?
-
-Actually, the bug is in `htonl()`.
-
-According to `'man htonl'`, `htonl()` is a *function*, which means it's valid to
-use `htonl` as a function pointer. However, in opt mode `htonl()` is defined as
-a *macro*, which breaks this usage.
-
-Worse, the macro definition of `htonl()` uses a `gcc` extension and is *not*
-standard C++. That hacky implementation has some ad hoc limitations. In
-particular, it prevents you from writing `Foo<sizeof(htonl(x))>()`, where `Foo`
-is a template that has an integral argument.
-
-The implementation of `EXPECT_EQ(a, b)` uses `sizeof(... a ...)` inside a
-template argument, and thus doesn't compile in opt mode when `a` contains a call
-to `htonl()`. It is difficult to make `EXPECT_EQ` bypass the `htonl()` bug, as
-the solution must work with different compilers on various platforms.
-
-## The compiler complains about "undefined references" to some static const member variables, but I did define them in the class body. What's wrong?
-
-If your class has a static data member:
-
-```c++
-// foo.h
-class Foo {
-  ...
-  static const int kBar = 100;
-};
-```
-
-You also need to define it *outside* of the class body in `foo.cc`:
-
-```c++
-const int Foo::kBar;  // No initializer here.
-```
-
-Otherwise your code is **invalid C++**, and may break in unexpected ways. In
-particular, using it in googletest comparison assertions (`EXPECT_EQ`, etc) will
-generate an "undefined reference" linker error. The fact that "it used to work"
-doesn't mean it's valid. It just means that you were lucky. :-)
-
-If the declaration of the static data member is `constexpr` then it is
-implicitly an `inline` definition, and a separate definition in `foo.cc` is not
-needed:
-
-```c++
-// foo.h
-class Foo {
-  ...
-  static constexpr int kBar = 100;  // Defines kBar, no need to do it in foo.cc.
-};
-```
-
-## Can I derive a test fixture from another?
-
-Yes.
-
-Each test fixture has a corresponding and same named test suite. This means only
-one test suite can use a particular fixture. Sometimes, however, multiple test
-cases may want to use the same or slightly different fixtures. For example, you
-may want to make sure that all of a GUI library's test suites don't leak
-important system resources like fonts and brushes.
-
-In googletest, you share a fixture among test suites by putting the shared logic
-in a base test fixture, then deriving from that base a separate fixture for each
-test suite that wants to use this common logic. You then use `TEST_F()` to write
-tests using each derived fixture.
-
-Typically, your code looks like this:
-
-```c++
-// Defines a base test fixture.
-class BaseTest : public ::testing::Test {
- protected:
-  ...
-};
-
-// Derives a fixture FooTest from BaseTest.
-class FooTest : public BaseTest {
- protected:
-  void SetUp() override {
-    BaseTest::SetUp();  // Sets up the base fixture first.
-    ... additional set-up work ...
-  }
-
-  void TearDown() override {
-    ... clean-up work for FooTest ...
-    BaseTest::TearDown();  // Remember to tear down the base fixture
-                           // after cleaning up FooTest!
-  }
-
-  ... functions and variables for FooTest ...
-};
-
-// Tests that use the fixture FooTest.
-TEST_F(FooTest, Bar) { ... }
-TEST_F(FooTest, Baz) { ... }
-
-... additional fixtures derived from BaseTest ...
-```
-
-If necessary, you can continue to derive test fixtures from a derived fixture.
-googletest has no limit on how deep the hierarchy can be.
-
-For a complete example using derived test fixtures, see
-[sample5_unittest.cc](https://github.com/google/googletest/blob/master/googletest/samples/sample5_unittest.cc).
-
-## My compiler complains "void value not ignored as it ought to be." What does this mean?
-
-You're probably using an `ASSERT_*()` in a function that doesn't return `void`.
-`ASSERT_*()` can only be used in `void` functions, due to exceptions being
-disabled by our build system. Please see more details
-[here](advanced.md#assertion-placement).
-
-## My death test hangs (or seg-faults). How do I fix it?
-
-In googletest, death tests are run in a child process and the way they work is
-delicate. To write death tests you really need to understand how they work.
-Please make sure you have read [this](advanced.md#how-it-works).
-
-In particular, death tests don't like having multiple threads in the parent
-process. So the first thing you can try is to eliminate creating threads outside
-of `EXPECT_DEATH()`. For example, you may want to use mocks or fake objects
-instead of real ones in your tests.
-
-Sometimes this is impossible as some library you must use may be creating
-threads before `main()` is even reached. In this case, you can try to minimize
-the chance of conflicts by either moving as many activities as possible inside
-`EXPECT_DEATH()` (in the extreme case, you want to move everything inside), or
-leaving as few things as possible in it. Also, you can try to set the death test
-style to `"threadsafe"`, which is safer but slower, and see if it helps.
-
-If you go with thread-safe death tests, remember that they rerun the test
-program from the beginning in the child process. Therefore make sure your
-program can run side-by-side with itself and is deterministic.
-
-In the end, this boils down to good concurrent programming. You have to make
-sure that there are no race conditions or deadlocks in your program. No silver
-bullet - sorry!
-
-## Should I use the constructor/destructor of the test fixture or SetUp()/TearDown()? {#CtorVsSetUp}
-
-The first thing to remember is that googletest does **not** reuse the same test
-fixture object across multiple tests. For each `TEST_F`, googletest will create
-a **fresh** test fixture object, immediately call `SetUp()`, run the test body,
-call `TearDown()`, and then delete the test fixture object.
-
-When you need to write per-test set-up and tear-down logic, you have the choice
-between using the test fixture constructor/destructor or `SetUp()/TearDown()`.
-The former is usually preferred, as it has the following benefits:
-
-*   By initializing a member variable in the constructor, we have the option to
-    make it `const`, which helps prevent accidental changes to its value and
-    makes the tests more obviously correct.
-*   In case we need to subclass the test fixture class, the subclass'
-    constructor is guaranteed to call the base class' constructor *first*, and
-    the subclass' destructor is guaranteed to call the base class' destructor
-    *afterward*. With `SetUp()/TearDown()`, a subclass may make the mistake of
-    forgetting to call the base class' `SetUp()/TearDown()` or call them at the
-    wrong time.
-
-You may still want to use `SetUp()/TearDown()` in the following cases:
-
-*   C++ does not allow virtual function calls in constructors and destructors.
-    You can call a method declared as virtual, but it will not use dynamic
-    dispatch, it will use the definition from the class the constructor of which
-    is currently executing. This is because calling a virtual method before the
-    derived class constructor has a chance to run is very dangerous - the
-    virtual method might operate on uninitialized data. Therefore, if you need
-    to call a method that will be overridden in a derived class, you have to use
-    `SetUp()/TearDown()`.
-*   In the body of a constructor (or destructor), it's not possible to use the
-    `ASSERT_xx` macros. Therefore, if the set-up operation could cause a fatal
-    test failure that should prevent the test from running, it's necessary to
-    use `abort` and abort the whole test
-    executable, or to use `SetUp()` instead of a constructor.
-*   If the tear-down operation could throw an exception, you must use
-    `TearDown()` as opposed to the destructor, as throwing in a destructor leads
-    to undefined behavior and usually will kill your program right away. Note
-    that many standard libraries (like STL) may throw when exceptions are
-    enabled in the compiler. Therefore you should prefer `TearDown()` if you
-    want to write portable tests that work with or without exceptions.
-*   The googletest team is considering making the assertion macros throw on
-    platforms where exceptions are enabled (e.g. Windows, Mac OS, and Linux
-    client-side), which will eliminate the need for the user to propagate
-    failures from a subroutine to its caller. Therefore, you shouldn't use
-    googletest assertions in a destructor if your code could run on such a
-    platform.
-
-## The compiler complains "no matching function to call" when I use ASSERT_PRED*. How do I fix it?
-
-If the predicate function you use in `ASSERT_PRED*` or `EXPECT_PRED*` is
-overloaded or a template, the compiler will have trouble figuring out which
-overloaded version it should use. `ASSERT_PRED_FORMAT*` and
-`EXPECT_PRED_FORMAT*` don't have this problem.
-
-If you see this error, you might want to switch to
-`(ASSERT|EXPECT)_PRED_FORMAT*`, which will also give you a better failure
-message. If, however, that is not an option, you can resolve the problem by
-explicitly telling the compiler which version to pick.
-
-For example, suppose you have
-
-```c++
-bool IsPositive(int n) {
-  return n > 0;
-}
-
-bool IsPositive(double x) {
-  return x > 0;
-}
-```
-
-you will get a compiler error if you write
-
-```c++
-EXPECT_PRED1(IsPositive, 5);
-```
-
-However, this will work:
-
-```c++
-EXPECT_PRED1(static_cast<bool (*)(int)>(IsPositive), 5);
-```
-
-(The stuff inside the angled brackets for the `static_cast` operator is the type
-of the function pointer for the `int`-version of `IsPositive()`.)
-
-As another example, when you have a template function
-
-```c++
-template <typename T>
-bool IsNegative(T x) {
-  return x < 0;
-}
-```
-
-you can use it in a predicate assertion like this:
-
-```c++
-ASSERT_PRED1(IsNegative<int>, -5);
-```
-
-Things are more interesting if your template has more than one parameter. The
-following won't compile:
-
-```c++
-ASSERT_PRED2(GreaterThan<int, int>, 5, 0);
-```
-
-as the C++ pre-processor thinks you are giving `ASSERT_PRED2` 4 arguments, which
-is one more than expected. The workaround is to wrap the predicate function in
-parentheses:
-
-```c++
-ASSERT_PRED2((GreaterThan<int, int>), 5, 0);
-```
-
-## My compiler complains about "ignoring return value" when I call RUN_ALL_TESTS(). Why?
-
-Some people had been ignoring the return value of `RUN_ALL_TESTS()`. That is,
-instead of
-
-```c++
-  return RUN_ALL_TESTS();
-```
-
-they write
-
-```c++
-  RUN_ALL_TESTS();
-```
-
-This is **wrong and dangerous**. The testing services needs to see the return
-value of `RUN_ALL_TESTS()` in order to determine if a test has passed. If your
-`main()` function ignores it, your test will be considered successful even if it
-has a googletest assertion failure. Very bad.
-
-We have decided to fix this (thanks to Michael Chastain for the idea). Now, your
-code will no longer be able to ignore `RUN_ALL_TESTS()` when compiled with
-`gcc`. If you do so, you'll get a compiler error.
-
-If you see the compiler complaining about you ignoring the return value of
-`RUN_ALL_TESTS()`, the fix is simple: just make sure its value is used as the
-return value of `main()`.
-
-But how could we introduce a change that breaks existing tests? Well, in this
-case, the code was already broken in the first place, so we didn't break it. :-)
-
-## My compiler complains that a constructor (or destructor) cannot return a value. What's going on?
-
-Due to a peculiarity of C++, in order to support the syntax for streaming
-messages to an `ASSERT_*`, e.g.
-
-```c++
-  ASSERT_EQ(1, Foo()) << "blah blah" << foo;
-```
-
-we had to give up using `ASSERT*` and `FAIL*` (but not `EXPECT*` and
-`ADD_FAILURE*`) in constructors and destructors. The workaround is to move the
-content of your constructor/destructor to a private void member function, or
-switch to `EXPECT_*()` if that works. This
-[section](advanced.md#assertion-placement) in the user's guide explains it.
-
-## My SetUp() function is not called. Why?
-
-C++ is case-sensitive. Did you spell it as `Setup()`?
-
-Similarly, sometimes people spell `SetUpTestSuite()` as `SetupTestSuite()` and
-wonder why it's never called.
-
-
-## I have several test suites which share the same test fixture logic, do I have to define a new test fixture class for each of them? This seems pretty tedious.
-
-You don't have to. Instead of
-
-```c++
-class FooTest : public BaseTest {};
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-class BarTest : public BaseTest {};
-
-TEST_F(BarTest, Abc) { ... }
-TEST_F(BarTest, Def) { ... }
-```
-
-you can simply `typedef` the test fixtures:
-
-```c++
-typedef BaseTest FooTest;
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-typedef BaseTest BarTest;
-
-TEST_F(BarTest, Abc) { ... }
-TEST_F(BarTest, Def) { ... }
-```
-
-## googletest output is buried in a whole bunch of LOG messages. What do I do?
-
-The googletest output is meant to be a concise and human-friendly report. If
-your test generates textual output itself, it will mix with the googletest
-output, making it hard to read. However, there is an easy solution to this
-problem.
-
-Since `LOG` messages go to stderr, we decided to let googletest output go to
-stdout. This way, you can easily separate the two using redirection. For
-example:
-
-```shell
-$ ./my_test > gtest_output.txt
-```
-
-## Why should I prefer test fixtures over global variables?
-
-There are several good reasons:
-
-1.  It's likely your test needs to change the states of its global variables.
-    This makes it difficult to keep side effects from escaping one test and
-    contaminating others, making debugging difficult. By using fixtures, each
-    test has a fresh set of variables that's different (but with the same
-    names). Thus, tests are kept independent of each other.
-2.  Global variables pollute the global namespace.
-3.  Test fixtures can be reused via subclassing, which cannot be done easily
-    with global variables. This is useful if many test suites have something in
-    common.
-
-## What can the statement argument in ASSERT_DEATH() be?
-
-`ASSERT_DEATH(statement, matcher)` (or any death assertion macro) can be used
-wherever *`statement`* is valid. So basically *`statement`* can be any C++
-statement that makes sense in the current context. In particular, it can
-reference global and/or local variables, and can be:
-
-*   a simple function call (often the case),
-*   a complex expression, or
-*   a compound statement.
-
-Some examples are shown here:
-
-```c++
-// A death test can be a simple function call.
-TEST(MyDeathTest, FunctionCall) {
-  ASSERT_DEATH(Xyz(5), "Xyz failed");
-}
-
-// Or a complex expression that references variables and functions.
-TEST(MyDeathTest, ComplexExpression) {
-  const bool c = Condition();
-  ASSERT_DEATH((c ? Func1(0) : object2.Method("test")),
-               "(Func1|Method) failed");
-}
-
-// Death assertions can be used anywhere in a function.  In
-// particular, they can be inside a loop.
-TEST(MyDeathTest, InsideLoop) {
-  // Verifies that Foo(0), Foo(1), ..., and Foo(4) all die.
-  for (int i = 0; i < 5; i++) {
-    EXPECT_DEATH_M(Foo(i), "Foo has \\d+ errors",
-                   ::testing::Message() << "where i is " << i);
-  }
-}
-
-// A death assertion can contain a compound statement.
-TEST(MyDeathTest, CompoundStatement) {
-  // Verifies that at lease one of Bar(0), Bar(1), ..., and
-  // Bar(4) dies.
-  ASSERT_DEATH({
-    for (int i = 0; i < 5; i++) {
-      Bar(i);
-    }
-  },
-  "Bar has \\d+ errors");
-}
-```
-
-## I have a fixture class `FooTest`, but `TEST_F(FooTest, Bar)` gives me error ``"no matching function for call to `FooTest::FooTest()'"``. Why?
-
-Googletest needs to be able to create objects of your test fixture class, so it
-must have a default constructor. Normally the compiler will define one for you.
-However, there are cases where you have to define your own:
-
-*   If you explicitly declare a non-default constructor for class `FooTest`
-    (`DISALLOW_EVIL_CONSTRUCTORS()` does this), then you need to define a
-    default constructor, even if it would be empty.
-*   If `FooTest` has a const non-static data member, then you have to define the
-    default constructor *and* initialize the const member in the initializer
-    list of the constructor. (Early versions of `gcc` doesn't force you to
-    initialize the const member. It's a bug that has been fixed in `gcc 4`.)
-
-## Why does ASSERT_DEATH complain about previous threads that were already joined?
-
-With the Linux pthread library, there is no turning back once you cross the line
-from a single thread to multiple threads. The first time you create a thread, a
-manager thread is created in addition, so you get 3, not 2, threads. Later when
-the thread you create joins the main thread, the thread count decrements by 1,
-but the manager thread will never be killed, so you still have 2 threads, which
-means you cannot safely run a death test.
-
-The new NPTL thread library doesn't suffer from this problem, as it doesn't
-create a manager thread. However, if you don't control which machine your test
-runs on, you shouldn't depend on this.
-
-## Why does googletest require the entire test suite, instead of individual tests, to be named *DeathTest when it uses ASSERT_DEATH?
-
-googletest does not interleave tests from different test suites. That is, it
-runs all tests in one test suite first, and then runs all tests in the next test
-suite, and so on. googletest does this because it needs to set up a test suite
-before the first test in it is run, and tear it down afterwards. Splitting up
-the test case would require multiple set-up and tear-down processes, which is
-inefficient and makes the semantics unclean.
-
-If we were to determine the order of tests based on test name instead of test
-case name, then we would have a problem with the following situation:
-
-```c++
-TEST_F(FooTest, AbcDeathTest) { ... }
-TEST_F(FooTest, Uvw) { ... }
-
-TEST_F(BarTest, DefDeathTest) { ... }
-TEST_F(BarTest, Xyz) { ... }
-```
-
-Since `FooTest.AbcDeathTest` needs to run before `BarTest.Xyz`, and we don't
-interleave tests from different test suites, we need to run all tests in the
-`FooTest` case before running any test in the `BarTest` case. This contradicts
-with the requirement to run `BarTest.DefDeathTest` before `FooTest.Uvw`.
-
-## But I don't like calling my entire test suite \*DeathTest when it contains both death tests and non-death tests. What do I do?
-
-You don't have to, but if you like, you may split up the test suite into
-`FooTest` and `FooDeathTest`, where the names make it clear that they are
-related:
-
-```c++
-class FooTest : public ::testing::Test { ... };
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-using FooDeathTest = FooTest;
-
-TEST_F(FooDeathTest, Uvw) { ... EXPECT_DEATH(...) ... }
-TEST_F(FooDeathTest, Xyz) { ... ASSERT_DEATH(...) ... }
-```
-
-## googletest prints the LOG messages in a death test's child process only when the test fails. How can I see the LOG messages when the death test succeeds?
-
-Printing the LOG messages generated by the statement inside `EXPECT_DEATH()`
-makes it harder to search for real problems in the parent's log. Therefore,
-googletest only prints them when the death test has failed.
-
-If you really need to see such LOG messages, a workaround is to temporarily
-break the death test (e.g. by changing the regex pattern it is expected to
-match). Admittedly, this is a hack. We'll consider a more permanent solution
-after the fork-and-exec-style death tests are implemented.
-
-## The compiler complains about `no match for 'operator<<'` when I use an assertion. What gives?
-
-If you use a user-defined type `FooType` in an assertion, you must make sure
-there is an `std::ostream& operator<<(std::ostream&, const FooType&)` function
-defined such that we can print a value of `FooType`.
-
-In addition, if `FooType` is declared in a name space, the `<<` operator also
-needs to be defined in the *same* name space. See
-[Tip of the Week #49](http://abseil.io/tips/49) for details.
-
-## How do I suppress the memory leak messages on Windows?
-
-Since the statically initialized googletest singleton requires allocations on
-the heap, the Visual C++ memory leak detector will report memory leaks at the
-end of the program run. The easiest way to avoid this is to use the
-`_CrtMemCheckpoint` and `_CrtMemDumpAllObjectsSince` calls to not report any
-statically initialized heap objects. See MSDN for more details and additional
-heap check/debug routines.
-
-## How can my code detect if it is running in a test?
-
-If you write code that sniffs whether it's running in a test and does different
-things accordingly, you are leaking test-only logic into production code and
-there is no easy way to ensure that the test-only code paths aren't run by
-mistake in production. Such cleverness also leads to
-[Heisenbugs](https://en.wikipedia.org/wiki/Heisenbug). Therefore we strongly
-advise against the practice, and googletest doesn't provide a way to do it.
-
-In general, the recommended way to cause the code to behave differently under
-test is [Dependency Injection](http://en.wikipedia.org/wiki/Dependency_injection). You can inject
-different functionality from the test and from the production code. Since your
-production code doesn't link in the for-test logic at all (the
-[`testonly`](http://docs.bazel.build/versions/master/be/common-definitions.html#common.testonly) attribute for BUILD targets helps to ensure
-that), there is no danger in accidentally running it.
-
-However, if you *really*, *really*, *really* have no choice, and if you follow
-the rule of ending your test program names with `_test`, you can use the
-*horrible* hack of sniffing your executable name (`argv[0]` in `main()`) to know
-whether the code is under test.
-
-## How do I temporarily disable a test?
-
-If you have a broken test that you cannot fix right away, you can add the
-`DISABLED_` prefix to its name. This will exclude it from execution. This is
-better than commenting out the code or using `#if 0`, as disabled tests are
-still compiled (and thus won't rot).
-
-To include disabled tests in test execution, just invoke the test program with
-the `--gtest_also_run_disabled_tests` flag.
-
-## Is it OK if I have two separate `TEST(Foo, Bar)` test methods defined in different namespaces?
-
-Yes.
-
-The rule is **all test methods in the same test suite must use the same fixture
-class.** This means that the following is **allowed** because both tests use the
-same fixture class (`::testing::Test`).
-
-```c++
-namespace foo {
-TEST(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace foo
-
-namespace bar {
-TEST(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace bar
-```
-
-However, the following code is **not allowed** and will produce a runtime error
-from googletest because the test methods are using different test fixture
-classes with the same test suite name.
-
-```c++
-namespace foo {
-class CoolTest : public ::testing::Test {};  // Fixture foo::CoolTest
-TEST_F(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace foo
-
-namespace bar {
-class CoolTest : public ::testing::Test {};  // Fixture: bar::CoolTest
-TEST_F(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace bar
-```
diff --git a/third_party/googletest/docs/gmock_cheat_sheet.md b/third_party/googletest/docs/gmock_cheat_sheet.md
deleted file mode 100644
index cda9ddd..0000000
--- a/third_party/googletest/docs/gmock_cheat_sheet.md
+++ /dev/null
@@ -1,483 +0,0 @@
-# gMock Cheat Sheet
-
-## Defining a Mock Class
-
-### Mocking a Normal Class {#MockClass}
-
-Given
-
-```cpp
-class Foo {
-  ...
-  virtual ~Foo();
-  virtual int GetSize() const = 0;
-  virtual string Describe(const char* name) = 0;
-  virtual string Describe(int type) = 0;
-  virtual bool Process(Bar elem, int count) = 0;
-};
-```
-
-(note that `~Foo()` **must** be virtual) we can define its mock as
-
-```cpp
-#include "gmock/gmock.h"
-
-class MockFoo : public Foo {
-  ...
-  MOCK_METHOD(int, GetSize, (), (const, override));
-  MOCK_METHOD(string, Describe, (const char* name), (override));
-  MOCK_METHOD(string, Describe, (int type), (override));
-  MOCK_METHOD(bool, Process, (Bar elem, int count), (override));
-};
-```
-
-To create a "nice" mock, which ignores all uninteresting calls, a "naggy" mock,
-which warns on all uninteresting calls, or a "strict" mock, which treats them as
-failures:
-
-```cpp
-using ::testing::NiceMock;
-using ::testing::NaggyMock;
-using ::testing::StrictMock;
-
-NiceMock<MockFoo> nice_foo;      // The type is a subclass of MockFoo.
-NaggyMock<MockFoo> naggy_foo;    // The type is a subclass of MockFoo.
-StrictMock<MockFoo> strict_foo;  // The type is a subclass of MockFoo.
-```
-
-{: .callout .note}
-**Note:** A mock object is currently naggy by default. We may make it nice by
-default in the future.
-
-### Mocking a Class Template {#MockTemplate}
-
-Class templates can be mocked just like any class.
-
-To mock
-
-```cpp
-template <typename Elem>
-class StackInterface {
-  ...
-  virtual ~StackInterface();
-  virtual int GetSize() const = 0;
-  virtual void Push(const Elem& x) = 0;
-};
-```
-
-(note that all member functions that are mocked, including `~StackInterface()`
-**must** be virtual).
-
-```cpp
-template <typename Elem>
-class MockStack : public StackInterface<Elem> {
-  ...
-  MOCK_METHOD(int, GetSize, (), (const, override));
-  MOCK_METHOD(void, Push, (const Elem& x), (override));
-};
-```
-
-### Specifying Calling Conventions for Mock Functions
-
-If your mock function doesn't use the default calling convention, you can
-specify it by adding `Calltype(convention)` to `MOCK_METHOD`'s 4th parameter.
-For example,
-
-```cpp
-  MOCK_METHOD(bool, Foo, (int n), (Calltype(STDMETHODCALLTYPE)));
-  MOCK_METHOD(int, Bar, (double x, double y),
-              (const, Calltype(STDMETHODCALLTYPE)));
-```
-
-where `STDMETHODCALLTYPE` is defined by `<objbase.h>` on Windows.
-
-## Using Mocks in Tests {#UsingMocks}
-
-The typical work flow is:
-
-1.  Import the gMock names you need to use. All gMock symbols are in the
-    `testing` namespace unless they are macros or otherwise noted.
-2.  Create the mock objects.
-3.  Optionally, set the default actions of the mock objects.
-4.  Set your expectations on the mock objects (How will they be called? What
-    will they do?).
-5.  Exercise code that uses the mock objects; if necessary, check the result
-    using googletest assertions.
-6.  When a mock object is destructed, gMock automatically verifies that all
-    expectations on it have been satisfied.
-
-Here's an example:
-
-```cpp
-using ::testing::Return;                          // #1
-
-TEST(BarTest, DoesThis) {
-  MockFoo foo;                                    // #2
-
-  ON_CALL(foo, GetSize())                         // #3
-      .WillByDefault(Return(1));
-  // ... other default actions ...
-
-  EXPECT_CALL(foo, Describe(5))                   // #4
-      .Times(3)
-      .WillRepeatedly(Return("Category 5"));
-  // ... other expectations ...
-
-  EXPECT_EQ(MyProductionFunction(&foo), "good");  // #5
-}                                                 // #6
-```
-
-## Setting Default Actions {#OnCall}
-
-gMock has a **built-in default action** for any function that returns `void`,
-`bool`, a numeric value, or a pointer. In C++11, it will additionally returns
-the default-constructed value, if one exists for the given type.
-
-To customize the default action for functions with return type *`T`*:
-
-```cpp
-using ::testing::DefaultValue;
-
-// Sets the default value to be returned. T must be CopyConstructible.
-DefaultValue<T>::Set(value);
-// Sets a factory. Will be invoked on demand. T must be MoveConstructible.
-//  T MakeT();
-DefaultValue<T>::SetFactory(&MakeT);
-// ... use the mocks ...
-// Resets the default value.
-DefaultValue<T>::Clear();
-```
-
-Example usage:
-
-```cpp
-  // Sets the default action for return type std::unique_ptr<Buzz> to
-  // creating a new Buzz every time.
-  DefaultValue<std::unique_ptr<Buzz>>::SetFactory(
-      [] { return MakeUnique<Buzz>(AccessLevel::kInternal); });
-
-  // When this fires, the default action of MakeBuzz() will run, which
-  // will return a new Buzz object.
-  EXPECT_CALL(mock_buzzer_, MakeBuzz("hello")).Times(AnyNumber());
-
-  auto buzz1 = mock_buzzer_.MakeBuzz("hello");
-  auto buzz2 = mock_buzzer_.MakeBuzz("hello");
-  EXPECT_NE(buzz1, nullptr);
-  EXPECT_NE(buzz2, nullptr);
-  EXPECT_NE(buzz1, buzz2);
-
-  // Resets the default action for return type std::unique_ptr<Buzz>,
-  // to avoid interfere with other tests.
-  DefaultValue<std::unique_ptr<Buzz>>::Clear();
-```
-
-To customize the default action for a particular method of a specific mock
-object, use `ON_CALL()`. `ON_CALL()` has a similar syntax to `EXPECT_CALL()`,
-but it is used for setting default behaviors (when you do not require that the
-mock method is called). See [here](gmock_cook_book.md#UseOnCall) for a more
-detailed discussion.
-
-```cpp
-ON_CALL(mock-object, method(matchers))
-    .With(multi-argument-matcher)   ?
-    .WillByDefault(action);
-```
-
-## Setting Expectations {#ExpectCall}
-
-`EXPECT_CALL()` sets **expectations** on a mock method (How will it be called?
-What will it do?):
-
-```cpp
-EXPECT_CALL(mock-object, method (matchers)?)
-     .With(multi-argument-matcher)  ?
-     .Times(cardinality)            ?
-     .InSequence(sequences)         *
-     .After(expectations)           *
-     .WillOnce(action)              *
-     .WillRepeatedly(action)        ?
-     .RetiresOnSaturation();        ?
-```
-
-For each item above, `?` means it can be used at most once, while `*` means it
-can be used any number of times.
-
-In order to pass, `EXPECT_CALL` must be used before the calls are actually made.
-
-The `(matchers)` is a comma-separated list of matchers that correspond to each
-of the arguments of `method`, and sets the expectation only for calls of
-`method` that matches all of the matchers.
-
-If `(matchers)` is omitted, the expectation is the same as if the matchers were
-set to anything matchers (for example, `(_, _, _, _)` for a four-arg method).
-
-If `Times()` is omitted, the cardinality is assumed to be:
-
-*   `Times(1)` when there is neither `WillOnce()` nor `WillRepeatedly()`;
-*   `Times(n)` when there are `n` `WillOnce()`s but no `WillRepeatedly()`, where
-    `n` >= 1; or
-*   `Times(AtLeast(n))` when there are `n` `WillOnce()`s and a
-    `WillRepeatedly()`, where `n` >= 0.
-
-A method with no `EXPECT_CALL()` is free to be invoked *any number of times*,
-and the default action will be taken each time.
-
-## Matchers {#MatcherList}
-
-See the [Matchers Reference](reference/matchers.md).
-
-## Actions {#ActionList}
-
-**Actions** specify what a mock function should do when invoked.
-
-### Returning a Value
-
-|                                   |                                               |
-| :-------------------------------- | :-------------------------------------------- |
-| `Return()`                        | Return from a `void` mock function.           |
-| `Return(value)`                   | Return `value`. If the type of `value` is     different to the mock function's return type, `value` is converted to the latter type <i>at the time the expectation is set</i>, not when the action is executed. |
-| `ReturnArg<N>()`                  | Return the `N`-th (0-based) argument.         |
-| `ReturnNew<T>(a1, ..., ak)`       | Return `new T(a1, ..., ak)`; a different      object is created each time. |
-| `ReturnNull()`                    | Return a null pointer.                        |
-| `ReturnPointee(ptr)`              | Return the value pointed to by `ptr`.         |
-| `ReturnRef(variable)`             | Return a reference to `variable`.             |
-| `ReturnRefOfCopy(value)`          | Return a reference to a copy of `value`; the  copy lives as long as the action. |
-| `ReturnRoundRobin({a1, ..., ak})` | Each call will return the next `ai` in the list, starting at the beginning when the end of the list is reached. |
-
-### Side Effects
-
-|                                    |                                         |
-| :--------------------------------- | :-------------------------------------- |
-| `Assign(&variable, value)` | Assign `value` to variable. |
-| `DeleteArg<N>()` | Delete the `N`-th (0-based) argument, which must be a pointer. |
-| `SaveArg<N>(pointer)` | Save the `N`-th (0-based) argument to `*pointer`. |
-| `SaveArgPointee<N>(pointer)` | Save the value pointed to by the `N`-th (0-based) argument to `*pointer`. |
-| `SetArgReferee<N>(value)` | Assign `value` to the variable referenced by the `N`-th (0-based) argument. |
-| `SetArgPointee<N>(value)` | Assign `value` to the variable pointed by the `N`-th (0-based) argument. |
-| `SetArgumentPointee<N>(value)` | Same as `SetArgPointee<N>(value)`. Deprecated. Will be removed in v1.7.0. |
-| `SetArrayArgument<N>(first, last)` | Copies the elements in source range [`first`, `last`) to the array pointed to by the `N`-th (0-based) argument, which can be either a pointer or an iterator. The action does not take ownership of the elements in the source range. |
-| `SetErrnoAndReturn(error, value)` | Set `errno` to `error` and return `value`. |
-| `Throw(exception)` | Throws the given exception, which can be any copyable value. Available since v1.1.0. |
-
-### Using a Function, Functor, or Lambda as an Action
-
-In the following, by "callable" we mean a free function, `std::function`,
-functor, or lambda.
-
-|                                     |                                        |
-| :---------------------------------- | :------------------------------------- |
-| `f` | Invoke f with the arguments passed to the mock function, where f is a callable. |
-| `Invoke(f)` | Invoke `f` with the arguments passed to the mock function, where `f` can be a global/static function or a functor. |
-| `Invoke(object_pointer, &class::method)` | Invoke the method on the object with the arguments passed to the mock function. |
-| `InvokeWithoutArgs(f)` | Invoke `f`, which can be a global/static function or a functor. `f` must take no arguments. |
-| `InvokeWithoutArgs(object_pointer, &class::method)` | Invoke the method on the object, which takes no arguments. |
-| `InvokeArgument<N>(arg1, arg2, ..., argk)` | Invoke the mock function's `N`-th (0-based) argument, which must be a function or a functor, with the `k` arguments. |
-
-The return value of the invoked function is used as the return value of the
-action.
-
-When defining a callable to be used with `Invoke*()`, you can declare any unused
-parameters as `Unused`:
-
-```cpp
-using ::testing::Invoke;
-double Distance(Unused, double x, double y) { return sqrt(x*x + y*y); }
-...
-EXPECT_CALL(mock, Foo("Hi", _, _)).WillOnce(Invoke(Distance));
-```
-
-`Invoke(callback)` and `InvokeWithoutArgs(callback)` take ownership of
-`callback`, which must be permanent. The type of `callback` must be a base
-callback type instead of a derived one, e.g.
-
-```cpp
-  BlockingClosure* done = new BlockingClosure;
-  ... Invoke(done) ...;  // This won't compile!
-
-  Closure* done2 = new BlockingClosure;
-  ... Invoke(done2) ...;  // This works.
-```
-
-In `InvokeArgument<N>(...)`, if an argument needs to be passed by reference,
-wrap it inside `std::ref()`. For example,
-
-```cpp
-using ::testing::InvokeArgument;
-...
-InvokeArgument<2>(5, string("Hi"), std::ref(foo))
-```
-
-calls the mock function's #2 argument, passing to it `5` and `string("Hi")` by
-value, and `foo` by reference.
-
-### Default Action
-
-| Matcher       | Description                                            |
-| :------------ | :----------------------------------------------------- |
-| `DoDefault()` | Do the default action (specified by `ON_CALL()` or the built-in one). |
-
-{: .callout .note}
-**Note:** due to technical reasons, `DoDefault()` cannot be used inside a
-composite action - trying to do so will result in a run-time error.
-
-### Composite Actions
-
-|                                |                                             |
-| :----------------------------- | :------------------------------------------ |
-| `DoAll(a1, a2, ..., an)`       | Do all actions `a1` to `an` and return the result of `an` in each invocation. The first `n - 1` sub-actions must return void and will receive a  readonly view of the arguments. |
-| `IgnoreResult(a)`              | Perform action `a` and ignore its result. `a` must not return void. |
-| `WithArg<N>(a)`                | Pass the `N`-th (0-based) argument of the mock function to action `a` and perform it. |
-| `WithArgs<N1, N2, ..., Nk>(a)` | Pass the selected (0-based) arguments of the mock function to action `a` and perform it. |
-| `WithoutArgs(a)`               | Perform action `a` without any arguments. |
-
-### Defining Actions
-
-|                                    |                                         |
-| :--------------------------------- | :-------------------------------------- |
-| `ACTION(Sum) { return arg0 + arg1; }` | Defines an action `Sum()` to return the sum of the mock function's argument #0 and #1. |
-| `ACTION_P(Plus, n) { return arg0 + n; }` | Defines an action `Plus(n)` to return the sum of the mock function's argument #0 and `n`. |
-| `ACTION_Pk(Foo, p1, ..., pk) { statements; }` | Defines a parameterized action `Foo(p1, ..., pk)` to execute the given `statements`. |
-
-The `ACTION*` macros cannot be used inside a function or class.
-
-## Cardinalities {#CardinalityList}
-
-These are used in `Times()` to specify how many times a mock function will be
-called:
-
-|                   |                                                        |
-| :---------------- | :----------------------------------------------------- |
-| `AnyNumber()`     | The function can be called any number of times.        |
-| `AtLeast(n)`      | The call is expected at least `n` times.               |
-| `AtMost(n)`       | The call is expected at most `n` times.                |
-| `Between(m, n)`   | The call is expected between `m` and `n` (inclusive) times. |
-| `Exactly(n) or n` | The call is expected exactly `n` times. In particular, the call should never happen when `n` is 0. |
-
-## Expectation Order
-
-By default, the expectations can be matched in *any* order. If some or all
-expectations must be matched in a given order, there are two ways to specify it.
-They can be used either independently or together.
-
-### The After Clause {#AfterClause}
-
-```cpp
-using ::testing::Expectation;
-...
-Expectation init_x = EXPECT_CALL(foo, InitX());
-Expectation init_y = EXPECT_CALL(foo, InitY());
-EXPECT_CALL(foo, Bar())
-     .After(init_x, init_y);
-```
-
-says that `Bar()` can be called only after both `InitX()` and `InitY()` have
-been called.
-
-If you don't know how many pre-requisites an expectation has when you write it,
-you can use an `ExpectationSet` to collect them:
-
-```cpp
-using ::testing::ExpectationSet;
-...
-ExpectationSet all_inits;
-for (int i = 0; i < element_count; i++) {
-  all_inits += EXPECT_CALL(foo, InitElement(i));
-}
-EXPECT_CALL(foo, Bar())
-     .After(all_inits);
-```
-
-says that `Bar()` can be called only after all elements have been initialized
-(but we don't care about which elements get initialized before the others).
-
-Modifying an `ExpectationSet` after using it in an `.After()` doesn't affect the
-meaning of the `.After()`.
-
-### Sequences {#UsingSequences}
-
-When you have a long chain of sequential expectations, it's easier to specify
-the order using **sequences**, which don't require you to give each expectation
-in the chain a different name. *All expected calls* in the same sequence must
-occur in the order they are specified.
-
-```cpp
-using ::testing::Return;
-using ::testing::Sequence;
-Sequence s1, s2;
-...
-EXPECT_CALL(foo, Reset())
-    .InSequence(s1, s2)
-    .WillOnce(Return(true));
-EXPECT_CALL(foo, GetSize())
-    .InSequence(s1)
-    .WillOnce(Return(1));
-EXPECT_CALL(foo, Describe(A<const char*>()))
-    .InSequence(s2)
-    .WillOnce(Return("dummy"));
-```
-
-says that `Reset()` must be called before *both* `GetSize()` *and* `Describe()`,
-and the latter two can occur in any order.
-
-To put many expectations in a sequence conveniently:
-
-```cpp
-using ::testing::InSequence;
-{
-  InSequence seq;
-
-  EXPECT_CALL(...)...;
-  EXPECT_CALL(...)...;
-  ...
-  EXPECT_CALL(...)...;
-}
-```
-
-says that all expected calls in the scope of `seq` must occur in strict order.
-The name `seq` is irrelevant.
-
-## Verifying and Resetting a Mock
-
-gMock will verify the expectations on a mock object when it is destructed, or
-you can do it earlier:
-
-```cpp
-using ::testing::Mock;
-...
-// Verifies and removes the expectations on mock_obj;
-// returns true if and only if successful.
-Mock::VerifyAndClearExpectations(&mock_obj);
-...
-// Verifies and removes the expectations on mock_obj;
-// also removes the default actions set by ON_CALL();
-// returns true if and only if successful.
-Mock::VerifyAndClear(&mock_obj);
-```
-
-You can also tell gMock that a mock object can be leaked and doesn't need to be
-verified:
-
-```cpp
-Mock::AllowLeak(&mock_obj);
-```
-
-## Mock Classes
-
-gMock defines a convenient mock class template
-
-```cpp
-class MockFunction<R(A1, ..., An)> {
- public:
-  MOCK_METHOD(R, Call, (A1, ..., An));
-};
-```
-
-See this [recipe](gmock_cook_book.md#using-check-points) for one application of
-it.
-
-## Flags
-
-| Flag                           | Description                               |
-| :----------------------------- | :---------------------------------------- |
-| `--gmock_catch_leaked_mocks=0` | Don't report leaked mock objects as failures. |
-| `--gmock_verbose=LEVEL` | Sets the default verbosity level (`info`, `warning`, or `error`) of Google Mock messages. |
diff --git a/third_party/googletest/docs/gmock_cook_book.md b/third_party/googletest/docs/gmock_cook_book.md
deleted file mode 100644
index 891c35c..0000000
--- a/third_party/googletest/docs/gmock_cook_book.md
+++ /dev/null
@@ -1,4354 +0,0 @@
-# gMock Cookbook
-
-You can find recipes for using gMock here. If you haven't yet, please read
-[the dummy guide](gmock_for_dummies.md) first to make sure you understand the
-basics.
-
-{: .callout .note}
-**Note:** gMock lives in the `testing` name space. For readability, it is
-recommended to write `using ::testing::Foo;` once in your file before using the
-name `Foo` defined by gMock. We omit such `using` statements in this section for
-brevity, but you should do it in your own code.
-
-## Creating Mock Classes
-
-Mock classes are defined as normal classes, using the `MOCK_METHOD` macro to
-generate mocked methods. The macro gets 3 or 4 parameters:
-
-```cpp
-class MyMock {
- public:
-  MOCK_METHOD(ReturnType, MethodName, (Args...));
-  MOCK_METHOD(ReturnType, MethodName, (Args...), (Specs...));
-};
-```
-
-The first 3 parameters are simply the method declaration, split into 3 parts.
-The 4th parameter accepts a closed list of qualifiers, which affect the
-generated method:
-
-*   **`const`** - Makes the mocked method a `const` method. Required if
-    overriding a `const` method.
-*   **`override`** - Marks the method with `override`. Recommended if overriding
-    a `virtual` method.
-*   **`noexcept`** - Marks the method with `noexcept`. Required if overriding a
-    `noexcept` method.
-*   **`Calltype(...)`** - Sets the call type for the method (e.g. to
-    `STDMETHODCALLTYPE`), useful in Windows.
-*   **`ref(...)`** - Marks the method with the reference qualification
-    specified. Required if overriding a method that has reference
-    qualifications. Eg `ref(&)` or `ref(&&)`.
-
-### Dealing with unprotected commas
-
-Unprotected commas, i.e. commas which are not surrounded by parentheses, prevent
-`MOCK_METHOD` from parsing its arguments correctly:
-
-{: .bad}
-```cpp
-class MockFoo {
- public:
-  MOCK_METHOD(std::pair<bool, int>, GetPair, ());  // Won't compile!
-  MOCK_METHOD(bool, CheckMap, (std::map<int, double>, bool));  // Won't compile!
-};
-```
-
-Solution 1 - wrap with parentheses:
-
-{: .good}
-```cpp
-class MockFoo {
- public:
-  MOCK_METHOD((std::pair<bool, int>), GetPair, ());
-  MOCK_METHOD(bool, CheckMap, ((std::map<int, double>), bool));
-};
-```
-
-Note that wrapping a return or argument type with parentheses is, in general,
-invalid C++. `MOCK_METHOD` removes the parentheses.
-
-Solution 2 - define an alias:
-
-{: .good}
-```cpp
-class MockFoo {
- public:
-  using BoolAndInt = std::pair<bool, int>;
-  MOCK_METHOD(BoolAndInt, GetPair, ());
-  using MapIntDouble = std::map<int, double>;
-  MOCK_METHOD(bool, CheckMap, (MapIntDouble, bool));
-};
-```
-
-### Mocking Private or Protected Methods
-
-You must always put a mock method definition (`MOCK_METHOD`) in a `public:`
-section of the mock class, regardless of the method being mocked being `public`,
-`protected`, or `private` in the base class. This allows `ON_CALL` and
-`EXPECT_CALL` to reference the mock function from outside of the mock class.
-(Yes, C++ allows a subclass to change the access level of a virtual function in
-the base class.) Example:
-
-```cpp
-class Foo {
- public:
-  ...
-  virtual bool Transform(Gadget* g) = 0;
-
- protected:
-  virtual void Resume();
-
- private:
-  virtual int GetTimeOut();
-};
-
-class MockFoo : public Foo {
- public:
-  ...
-  MOCK_METHOD(bool, Transform, (Gadget* g), (override));
-
-  // The following must be in the public section, even though the
-  // methods are protected or private in the base class.
-  MOCK_METHOD(void, Resume, (), (override));
-  MOCK_METHOD(int, GetTimeOut, (), (override));
-};
-```
-
-### Mocking Overloaded Methods
-
-You can mock overloaded functions as usual. No special attention is required:
-
-```cpp
-class Foo {
-  ...
-
-  // Must be virtual as we'll inherit from Foo.
-  virtual ~Foo();
-
-  // Overloaded on the types and/or numbers of arguments.
-  virtual int Add(Element x);
-  virtual int Add(int times, Element x);
-
-  // Overloaded on the const-ness of this object.
-  virtual Bar& GetBar();
-  virtual const Bar& GetBar() const;
-};
-
-class MockFoo : public Foo {
-  ...
-  MOCK_METHOD(int, Add, (Element x), (override));
-  MOCK_METHOD(int, Add, (int times, Element x), (override));
-
-  MOCK_METHOD(Bar&, GetBar, (), (override));
-  MOCK_METHOD(const Bar&, GetBar, (), (const, override));
-};
-```
-
-{: .callout .note}
-**Note:** if you don't mock all versions of the overloaded method, the compiler
-will give you a warning about some methods in the base class being hidden. To
-fix that, use `using` to bring them in scope:
-
-```cpp
-class MockFoo : public Foo {
-  ...
-  using Foo::Add;
-  MOCK_METHOD(int, Add, (Element x), (override));
-  // We don't want to mock int Add(int times, Element x);
-  ...
-};
-```
-
-### Mocking Class Templates
-
-You can mock class templates just like any class.
-
-```cpp
-template <typename Elem>
-class StackInterface {
-  ...
-  // Must be virtual as we'll inherit from StackInterface.
-  virtual ~StackInterface();
-
-  virtual int GetSize() const = 0;
-  virtual void Push(const Elem& x) = 0;
-};
-
-template <typename Elem>
-class MockStack : public StackInterface<Elem> {
-  ...
-  MOCK_METHOD(int, GetSize, (), (override));
-  MOCK_METHOD(void, Push, (const Elem& x), (override));
-};
-```
-
-### Mocking Non-virtual Methods {#MockingNonVirtualMethods}
-
-gMock can mock non-virtual functions to be used in Hi-perf dependency injection.
-
-In this case, instead of sharing a common base class with the real class, your
-mock class will be *unrelated* to the real class, but contain methods with the
-same signatures. The syntax for mocking non-virtual methods is the *same* as
-mocking virtual methods (just don't add `override`):
-
-```cpp
-// A simple packet stream class.  None of its members is virtual.
-class ConcretePacketStream {
- public:
-  void AppendPacket(Packet* new_packet);
-  const Packet* GetPacket(size_t packet_number) const;
-  size_t NumberOfPackets() const;
-  ...
-};
-
-// A mock packet stream class.  It inherits from no other, but defines
-// GetPacket() and NumberOfPackets().
-class MockPacketStream {
- public:
-  MOCK_METHOD(const Packet*, GetPacket, (size_t packet_number), (const));
-  MOCK_METHOD(size_t, NumberOfPackets, (), (const));
-  ...
-};
-```
-
-Note that the mock class doesn't define `AppendPacket()`, unlike the real class.
-That's fine as long as the test doesn't need to call it.
-
-Next, you need a way to say that you want to use `ConcretePacketStream` in
-production code, and use `MockPacketStream` in tests. Since the functions are
-not virtual and the two classes are unrelated, you must specify your choice at
-*compile time* (as opposed to run time).
-
-One way to do it is to templatize your code that needs to use a packet stream.
-More specifically, you will give your code a template type argument for the type
-of the packet stream. In production, you will instantiate your template with
-`ConcretePacketStream` as the type argument. In tests, you will instantiate the
-same template with `MockPacketStream`. For example, you may write:
-
-```cpp
-template <class PacketStream>
-void CreateConnection(PacketStream* stream) { ... }
-
-template <class PacketStream>
-class PacketReader {
- public:
-  void ReadPackets(PacketStream* stream, size_t packet_num);
-};
-```
-
-Then you can use `CreateConnection<ConcretePacketStream>()` and
-`PacketReader<ConcretePacketStream>` in production code, and use
-`CreateConnection<MockPacketStream>()` and `PacketReader<MockPacketStream>` in
-tests.
-
-```cpp
-  MockPacketStream mock_stream;
-  EXPECT_CALL(mock_stream, ...)...;
-  .. set more expectations on mock_stream ...
-  PacketReader<MockPacketStream> reader(&mock_stream);
-  ... exercise reader ...
-```
-
-### Mocking Free Functions
-
-It is not possible to directly mock a free function (i.e. a C-style function or
-a static method). If you need to, you can rewrite your code to use an interface
-(abstract class).
-
-Instead of calling a free function (say, `OpenFile`) directly, introduce an
-interface for it and have a concrete subclass that calls the free function:
-
-```cpp
-class FileInterface {
- public:
-  ...
-  virtual bool Open(const char* path, const char* mode) = 0;
-};
-
-class File : public FileInterface {
- public:
-  ...
-  bool Open(const char* path, const char* mode) override {
-     return OpenFile(path, mode);
-  }
-};
-```
-
-Your code should talk to `FileInterface` to open a file. Now it's easy to mock
-out the function.
-
-This may seem like a lot of hassle, but in practice you often have multiple
-related functions that you can put in the same interface, so the per-function
-syntactic overhead will be much lower.
-
-If you are concerned about the performance overhead incurred by virtual
-functions, and profiling confirms your concern, you can combine this with the
-recipe for [mocking non-virtual methods](#MockingNonVirtualMethods).
-
-### Old-Style `MOCK_METHODn` Macros
-
-Before the generic `MOCK_METHOD` macro
-[was introduced in 2018](https://github.com/google/googletest/commit/c5f08bf91944ce1b19bcf414fa1760e69d20afc2),
-mocks where created using a family of macros collectively called `MOCK_METHODn`.
-These macros are still supported, though migration to the new `MOCK_METHOD` is
-recommended.
-
-The macros in the `MOCK_METHODn` family differ from `MOCK_METHOD`:
-
-*   The general structure is `MOCK_METHODn(MethodName, ReturnType(Args))`,
-    instead of `MOCK_METHOD(ReturnType, MethodName, (Args))`.
-*   The number `n` must equal the number of arguments.
-*   When mocking a const method, one must use `MOCK_CONST_METHODn`.
-*   When mocking a class template, the macro name must be suffixed with `_T`.
-*   In order to specify the call type, the macro name must be suffixed with
-    `_WITH_CALLTYPE`, and the call type is the first macro argument.
-
-Old macros and their new equivalents:
-
-<table>
-  <tr><th colspan=2>Simple</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_METHOD1(Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Const Method</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_CONST_METHOD1(Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int), (const))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Method in a Class Template</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_METHOD1_T(Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Const Method in a Class Template</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_CONST_METHOD1_T(Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int), (const))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Method with Call Type</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int), (Calltype(STDMETHODCALLTYPE)))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Const Method with Call Type</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_CONST_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int), (const, Calltype(STDMETHODCALLTYPE)))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Method with Call Type in a Class Template</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_METHOD1_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int), (Calltype(STDMETHODCALLTYPE)))</code></td>
-  </tr>
-
-  <tr><th colspan=2>Const Method with Call Type in a Class Template</th></tr>
-  <tr>
-    <td>Old</td>
-    <td><code>MOCK_CONST_METHOD1_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Foo, bool(int))</code></td>
-  </tr>
-  <tr>
-    <td>New</td>
-    <td><code>MOCK_METHOD(bool, Foo, (int), (const, Calltype(STDMETHODCALLTYPE)))</code></td>
-  </tr>
-</table>
-
-### The Nice, the Strict, and the Naggy {#NiceStrictNaggy}
-
-If a mock method has no `EXPECT_CALL` spec but is called, we say that it's an
-"uninteresting call", and the default action (which can be specified using
-`ON_CALL()`) of the method will be taken. Currently, an uninteresting call will
-also by default cause gMock to print a warning. (In the future, we might remove
-this warning by default.)
-
-However, sometimes you may want to ignore these uninteresting calls, and
-sometimes you may want to treat them as errors. gMock lets you make the decision
-on a per-mock-object basis.
-
-Suppose your test uses a mock class `MockFoo`:
-
-```cpp
-TEST(...) {
-  MockFoo mock_foo;
-  EXPECT_CALL(mock_foo, DoThis());
-  ... code that uses mock_foo ...
-}
-```
-
-If a method of `mock_foo` other than `DoThis()` is called, you will get a
-warning. However, if you rewrite your test to use `NiceMock<MockFoo>` instead,
-you can suppress the warning:
-
-```cpp
-using ::testing::NiceMock;
-
-TEST(...) {
-  NiceMock<MockFoo> mock_foo;
-  EXPECT_CALL(mock_foo, DoThis());
-  ... code that uses mock_foo ...
-}
-```
-
-`NiceMock<MockFoo>` is a subclass of `MockFoo`, so it can be used wherever
-`MockFoo` is accepted.
-
-It also works if `MockFoo`'s constructor takes some arguments, as
-`NiceMock<MockFoo>` "inherits" `MockFoo`'s constructors:
-
-```cpp
-using ::testing::NiceMock;
-
-TEST(...) {
-  NiceMock<MockFoo> mock_foo(5, "hi");  // Calls MockFoo(5, "hi").
-  EXPECT_CALL(mock_foo, DoThis());
-  ... code that uses mock_foo ...
-}
-```
-
-The usage of `StrictMock` is similar, except that it makes all uninteresting
-calls failures:
-
-```cpp
-using ::testing::StrictMock;
-
-TEST(...) {
-  StrictMock<MockFoo> mock_foo;
-  EXPECT_CALL(mock_foo, DoThis());
-  ... code that uses mock_foo ...
-
-  // The test will fail if a method of mock_foo other than DoThis()
-  // is called.
-}
-```
-
-{: .callout .note}
-NOTE: `NiceMock` and `StrictMock` only affects *uninteresting* calls (calls of
-*methods* with no expectations); they do not affect *unexpected* calls (calls of
-methods with expectations, but they don't match). See
-[Understanding Uninteresting vs Unexpected Calls](#uninteresting-vs-unexpected).
-
-There are some caveats though (sadly they are side effects of C++'s
-limitations):
-
-1.  `NiceMock<MockFoo>` and `StrictMock<MockFoo>` only work for mock methods
-    defined using the `MOCK_METHOD` macro **directly** in the `MockFoo` class.
-    If a mock method is defined in a **base class** of `MockFoo`, the "nice" or
-    "strict" modifier may not affect it, depending on the compiler. In
-    particular, nesting `NiceMock` and `StrictMock` (e.g.
-    `NiceMock<StrictMock<MockFoo> >`) is **not** supported.
-2.  `NiceMock<MockFoo>` and `StrictMock<MockFoo>` may not work correctly if the
-    destructor of `MockFoo` is not virtual. We would like to fix this, but it
-    requires cleaning up existing tests.
-
-Finally, you should be **very cautious** about when to use naggy or strict
-mocks, as they tend to make tests more brittle and harder to maintain. When you
-refactor your code without changing its externally visible behavior, ideally you
-shouldn't need to update any tests. If your code interacts with a naggy mock,
-however, you may start to get spammed with warnings as the result of your
-change. Worse, if your code interacts with a strict mock, your tests may start
-to fail and you'll be forced to fix them. Our general recommendation is to use
-nice mocks (not yet the default) most of the time, use naggy mocks (the current
-default) when developing or debugging tests, and use strict mocks only as the
-last resort.
-
-### Simplifying the Interface without Breaking Existing Code {#SimplerInterfaces}
-
-Sometimes a method has a long list of arguments that is mostly uninteresting.
-For example:
-
-```cpp
-class LogSink {
- public:
-  ...
-  virtual void send(LogSeverity severity, const char* full_filename,
-                    const char* base_filename, int line,
-                    const struct tm* tm_time,
-                    const char* message, size_t message_len) = 0;
-};
-```
-
-This method's argument list is lengthy and hard to work with (the `message`
-argument is not even 0-terminated). If we mock it as is, using the mock will be
-awkward. If, however, we try to simplify this interface, we'll need to fix all
-clients depending on it, which is often infeasible.
-
-The trick is to redispatch the method in the mock class:
-
-```cpp
-class ScopedMockLog : public LogSink {
- public:
-  ...
-  void send(LogSeverity severity, const char* full_filename,
-                    const char* base_filename, int line, const tm* tm_time,
-                    const char* message, size_t message_len) override {
-    // We are only interested in the log severity, full file name, and
-    // log message.
-    Log(severity, full_filename, std::string(message, message_len));
-  }
-
-  // Implements the mock method:
-  //
-  //   void Log(LogSeverity severity,
-  //            const string& file_path,
-  //            const string& message);
-  MOCK_METHOD(void, Log,
-              (LogSeverity severity, const string& file_path,
-               const string& message));
-};
-```
-
-By defining a new mock method with a trimmed argument list, we make the mock
-class more user-friendly.
-
-This technique may also be applied to make overloaded methods more amenable to
-mocking. For example, when overloads have been used to implement default
-arguments:
-
-```cpp
-class MockTurtleFactory : public TurtleFactory {
- public:
-  Turtle* MakeTurtle(int length, int weight) override { ... }
-  Turtle* MakeTurtle(int length, int weight, int speed) override { ... }
-
-  // the above methods delegate to this one:
-  MOCK_METHOD(Turtle*, DoMakeTurtle, ());
-};
-```
-
-This allows tests that don't care which overload was invoked to avoid specifying
-argument matchers:
-
-```cpp
-ON_CALL(factory, DoMakeTurtle)
-    .WillByDefault(Return(MakeMockTurtle()));
-```
-
-### Alternative to Mocking Concrete Classes
-
-Often you may find yourself using classes that don't implement interfaces. In
-order to test your code that uses such a class (let's call it `Concrete`), you
-may be tempted to make the methods of `Concrete` virtual and then mock it.
-
-Try not to do that.
-
-Making a non-virtual function virtual is a big decision. It creates an extension
-point where subclasses can tweak your class' behavior. This weakens your control
-on the class because now it's harder to maintain the class invariants. You
-should make a function virtual only when there is a valid reason for a subclass
-to override it.
-
-Mocking concrete classes directly is problematic as it creates a tight coupling
-between the class and the tests - any small change in the class may invalidate
-your tests and make test maintenance a pain.
-
-To avoid such problems, many programmers have been practicing "coding to
-interfaces": instead of talking to the `Concrete` class, your code would define
-an interface and talk to it. Then you implement that interface as an adaptor on
-top of `Concrete`. In tests, you can easily mock that interface to observe how
-your code is doing.
-
-This technique incurs some overhead:
-
-*   You pay the cost of virtual function calls (usually not a problem).
-*   There is more abstraction for the programmers to learn.
-
-However, it can also bring significant benefits in addition to better
-testability:
-
-*   `Concrete`'s API may not fit your problem domain very well, as you may not
-    be the only client it tries to serve. By designing your own interface, you
-    have a chance to tailor it to your need - you may add higher-level
-    functionalities, rename stuff, etc instead of just trimming the class. This
-    allows you to write your code (user of the interface) in a more natural way,
-    which means it will be more readable, more maintainable, and you'll be more
-    productive.
-*   If `Concrete`'s implementation ever has to change, you don't have to rewrite
-    everywhere it is used. Instead, you can absorb the change in your
-    implementation of the interface, and your other code and tests will be
-    insulated from this change.
-
-Some people worry that if everyone is practicing this technique, they will end
-up writing lots of redundant code. This concern is totally understandable.
-However, there are two reasons why it may not be the case:
-
-*   Different projects may need to use `Concrete` in different ways, so the best
-    interfaces for them will be different. Therefore, each of them will have its
-    own domain-specific interface on top of `Concrete`, and they will not be the
-    same code.
-*   If enough projects want to use the same interface, they can always share it,
-    just like they have been sharing `Concrete`. You can check in the interface
-    and the adaptor somewhere near `Concrete` (perhaps in a `contrib`
-    sub-directory) and let many projects use it.
-
-You need to weigh the pros and cons carefully for your particular problem, but
-I'd like to assure you that the Java community has been practicing this for a
-long time and it's a proven effective technique applicable in a wide variety of
-situations. :-)
-
-### Delegating Calls to a Fake {#DelegatingToFake}
-
-Some times you have a non-trivial fake implementation of an interface. For
-example:
-
-```cpp
-class Foo {
- public:
-  virtual ~Foo() {}
-  virtual char DoThis(int n) = 0;
-  virtual void DoThat(const char* s, int* p) = 0;
-};
-
-class FakeFoo : public Foo {
- public:
-  char DoThis(int n) override {
-    return (n > 0) ? '+' :
-           (n < 0) ? '-' : '0';
-  }
-
-  void DoThat(const char* s, int* p) override {
-    *p = strlen(s);
-  }
-};
-```
-
-Now you want to mock this interface such that you can set expectations on it.
-However, you also want to use `FakeFoo` for the default behavior, as duplicating
-it in the mock object is, well, a lot of work.
-
-When you define the mock class using gMock, you can have it delegate its default
-action to a fake class you already have, using this pattern:
-
-```cpp
-class MockFoo : public Foo {
- public:
-  // Normal mock method definitions using gMock.
-  MOCK_METHOD(char, DoThis, (int n), (override));
-  MOCK_METHOD(void, DoThat, (const char* s, int* p), (override));
-
-  // Delegates the default actions of the methods to a FakeFoo object.
-  // This must be called *before* the custom ON_CALL() statements.
-  void DelegateToFake() {
-    ON_CALL(*this, DoThis).WillByDefault([this](int n) {
-      return fake_.DoThis(n);
-    });
-    ON_CALL(*this, DoThat).WillByDefault([this](const char* s, int* p) {
-      fake_.DoThat(s, p);
-    });
-  }
-
- private:
-  FakeFoo fake_;  // Keeps an instance of the fake in the mock.
-};
-```
-
-With that, you can use `MockFoo` in your tests as usual. Just remember that if
-you don't explicitly set an action in an `ON_CALL()` or `EXPECT_CALL()`, the
-fake will be called upon to do it.:
-
-```cpp
-using ::testing::_;
-
-TEST(AbcTest, Xyz) {
-  MockFoo foo;
-
-  foo.DelegateToFake();  // Enables the fake for delegation.
-
-  // Put your ON_CALL(foo, ...)s here, if any.
-
-  // No action specified, meaning to use the default action.
-  EXPECT_CALL(foo, DoThis(5));
-  EXPECT_CALL(foo, DoThat(_, _));
-
-  int n = 0;
-  EXPECT_EQ('+', foo.DoThis(5));  // FakeFoo::DoThis() is invoked.
-  foo.DoThat("Hi", &n);  // FakeFoo::DoThat() is invoked.
-  EXPECT_EQ(2, n);
-}
-```
-
-**Some tips:**
-
-*   If you want, you can still override the default action by providing your own
-    `ON_CALL()` or using `.WillOnce()` / `.WillRepeatedly()` in `EXPECT_CALL()`.
-*   In `DelegateToFake()`, you only need to delegate the methods whose fake
-    implementation you intend to use.
-
-*   The general technique discussed here works for overloaded methods, but
-    you'll need to tell the compiler which version you mean. To disambiguate a
-    mock function (the one you specify inside the parentheses of `ON_CALL()`),
-    use [this technique](#SelectOverload); to disambiguate a fake function (the
-    one you place inside `Invoke()`), use a `static_cast` to specify the
-    function's type. For instance, if class `Foo` has methods `char DoThis(int
-    n)` and `bool DoThis(double x) const`, and you want to invoke the latter,
-    you need to write `Invoke(&fake_, static_cast<bool (FakeFoo::*)(double)
-    const>(&FakeFoo::DoThis))` instead of `Invoke(&fake_, &FakeFoo::DoThis)`
-    (The strange-looking thing inside the angled brackets of `static_cast` is
-    the type of a function pointer to the second `DoThis()` method.).
-
-*   Having to mix a mock and a fake is often a sign of something gone wrong.
-    Perhaps you haven't got used to the interaction-based way of testing yet. Or
-    perhaps your interface is taking on too many roles and should be split up.
-    Therefore, **don't abuse this**. We would only recommend to do it as an
-    intermediate step when you are refactoring your code.
-
-Regarding the tip on mixing a mock and a fake, here's an example on why it may
-be a bad sign: Suppose you have a class `System` for low-level system
-operations. In particular, it does file and I/O operations. And suppose you want
-to test how your code uses `System` to do I/O, and you just want the file
-operations to work normally. If you mock out the entire `System` class, you'll
-have to provide a fake implementation for the file operation part, which
-suggests that `System` is taking on too many roles.
-
-Instead, you can define a `FileOps` interface and an `IOOps` interface and split
-`System`'s functionalities into the two. Then you can mock `IOOps` without
-mocking `FileOps`.
-
-### Delegating Calls to a Real Object
-
-When using testing doubles (mocks, fakes, stubs, and etc), sometimes their
-behaviors will differ from those of the real objects. This difference could be
-either intentional (as in simulating an error such that you can test the error
-handling code) or unintentional. If your mocks have different behaviors than the
-real objects by mistake, you could end up with code that passes the tests but
-fails in production.
-
-You can use the *delegating-to-real* technique to ensure that your mock has the
-same behavior as the real object while retaining the ability to validate calls.
-This technique is very similar to the [delegating-to-fake](#DelegatingToFake)
-technique, the difference being that we use a real object instead of a fake.
-Here's an example:
-
-```cpp
-using ::testing::AtLeast;
-
-class MockFoo : public Foo {
- public:
-  MockFoo() {
-    // By default, all calls are delegated to the real object.
-    ON_CALL(*this, DoThis).WillByDefault([this](int n) {
-      return real_.DoThis(n);
-    });
-    ON_CALL(*this, DoThat).WillByDefault([this](const char* s, int* p) {
-      real_.DoThat(s, p);
-    });
-    ...
-  }
-  MOCK_METHOD(char, DoThis, ...);
-  MOCK_METHOD(void, DoThat, ...);
-  ...
- private:
-  Foo real_;
-};
-
-...
-  MockFoo mock;
-  EXPECT_CALL(mock, DoThis())
-      .Times(3);
-  EXPECT_CALL(mock, DoThat("Hi"))
-      .Times(AtLeast(1));
-  ... use mock in test ...
-```
-
-With this, gMock will verify that your code made the right calls (with the right
-arguments, in the right order, called the right number of times, etc), and a
-real object will answer the calls (so the behavior will be the same as in
-production). This gives you the best of both worlds.
-
-### Delegating Calls to a Parent Class
-
-Ideally, you should code to interfaces, whose methods are all pure virtual. In
-reality, sometimes you do need to mock a virtual method that is not pure (i.e,
-it already has an implementation). For example:
-
-```cpp
-class Foo {
- public:
-  virtual ~Foo();
-
-  virtual void Pure(int n) = 0;
-  virtual int Concrete(const char* str) { ... }
-};
-
-class MockFoo : public Foo {
- public:
-  // Mocking a pure method.
-  MOCK_METHOD(void, Pure, (int n), (override));
-  // Mocking a concrete method.  Foo::Concrete() is shadowed.
-  MOCK_METHOD(int, Concrete, (const char* str), (override));
-};
-```
-
-Sometimes you may want to call `Foo::Concrete()` instead of
-`MockFoo::Concrete()`. Perhaps you want to do it as part of a stub action, or
-perhaps your test doesn't need to mock `Concrete()` at all (but it would be
-oh-so painful to have to define a new mock class whenever you don't need to mock
-one of its methods).
-
-You can call `Foo::Concrete()` inside an action by:
-
-```cpp
-...
-  EXPECT_CALL(foo, Concrete).WillOnce([&foo](const char* str) {
-    return foo.Foo::Concrete(str);
-  });
-```
-
-or tell the mock object that you don't want to mock `Concrete()`:
-
-```cpp
-...
-  ON_CALL(foo, Concrete).WillByDefault([&foo](const char* str) {
-    return foo.Foo::Concrete(str);
-  });
-```
-
-(Why don't we just write `{ return foo.Concrete(str); }`? If you do that,
-`MockFoo::Concrete()` will be called (and cause an infinite recursion) since
-`Foo::Concrete()` is virtual. That's just how C++ works.)
-
-## Using Matchers
-
-### Matching Argument Values Exactly
-
-You can specify exactly which arguments a mock method is expecting:
-
-```cpp
-using ::testing::Return;
-...
-  EXPECT_CALL(foo, DoThis(5))
-      .WillOnce(Return('a'));
-  EXPECT_CALL(foo, DoThat("Hello", bar));
-```
-
-### Using Simple Matchers
-
-You can use matchers to match arguments that have a certain property:
-
-```cpp
-using ::testing::NotNull;
-using ::testing::Return;
-...
-  EXPECT_CALL(foo, DoThis(Ge(5)))  // The argument must be >= 5.
-      .WillOnce(Return('a'));
-  EXPECT_CALL(foo, DoThat("Hello", NotNull()));
-      // The second argument must not be NULL.
-```
-
-A frequently used matcher is `_`, which matches anything:
-
-```cpp
-  EXPECT_CALL(foo, DoThat(_, NotNull()));
-```
-
-### Combining Matchers {#CombiningMatchers}
-
-You can build complex matchers from existing ones using `AllOf()`,
-`AllOfArray()`, `AnyOf()`, `AnyOfArray()` and `Not()`:
-
-```cpp
-using ::testing::AllOf;
-using ::testing::Gt;
-using ::testing::HasSubstr;
-using ::testing::Ne;
-using ::testing::Not;
-...
-  // The argument must be > 5 and != 10.
-  EXPECT_CALL(foo, DoThis(AllOf(Gt(5),
-                                Ne(10))));
-
-  // The first argument must not contain sub-string "blah".
-  EXPECT_CALL(foo, DoThat(Not(HasSubstr("blah")),
-                          NULL));
-```
-
-Matchers are function objects, and parametrized matchers can be composed just
-like any other function. However because their types can be long and rarely
-provide meaningful information, it can be easier to express them with C++14
-generic lambdas to avoid specifying types. For example,
-
-```cpp
-using ::testing::Contains;
-using ::testing::Property;
-
-inline constexpr auto HasFoo = [](const auto& f) {
-  return Property(&MyClass::foo, Contains(f));
-};
-...
-  EXPECT_THAT(x, HasFoo("blah"));
-```
-
-### Casting Matchers {#SafeMatcherCast}
-
-gMock matchers are statically typed, meaning that the compiler can catch your
-mistake if you use a matcher of the wrong type (for example, if you use `Eq(5)`
-to match a `string` argument). Good for you!
-
-Sometimes, however, you know what you're doing and want the compiler to give you
-some slack. One example is that you have a matcher for `long` and the argument
-you want to match is `int`. While the two types aren't exactly the same, there
-is nothing really wrong with using a `Matcher<long>` to match an `int` - after
-all, we can first convert the `int` argument to a `long` losslessly before
-giving it to the matcher.
-
-To support this need, gMock gives you the `SafeMatcherCast<T>(m)` function. It
-casts a matcher `m` to type `Matcher<T>`. To ensure safety, gMock checks that
-(let `U` be the type `m` accepts :
-
-1.  Type `T` can be *implicitly* cast to type `U`;
-2.  When both `T` and `U` are built-in arithmetic types (`bool`, integers, and
-    floating-point numbers), the conversion from `T` to `U` is not lossy (in
-    other words, any value representable by `T` can also be represented by `U`);
-    and
-3.  When `U` is a reference, `T` must also be a reference (as the underlying
-    matcher may be interested in the address of the `U` value).
-
-The code won't compile if any of these conditions isn't met.
-
-Here's one example:
-
-```cpp
-using ::testing::SafeMatcherCast;
-
-// A base class and a child class.
-class Base { ... };
-class Derived : public Base { ... };
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(void, DoThis, (Derived* derived), (override));
-};
-
-...
-  MockFoo foo;
-  // m is a Matcher<Base*> we got from somewhere.
-  EXPECT_CALL(foo, DoThis(SafeMatcherCast<Derived*>(m)));
-```
-
-If you find `SafeMatcherCast<T>(m)` too limiting, you can use a similar function
-`MatcherCast<T>(m)`. The difference is that `MatcherCast` works as long as you
-can `static_cast` type `T` to type `U`.
-
-`MatcherCast` essentially lets you bypass C++'s type system (`static_cast` isn't
-always safe as it could throw away information, for example), so be careful not
-to misuse/abuse it.
-
-### Selecting Between Overloaded Functions {#SelectOverload}
-
-If you expect an overloaded function to be called, the compiler may need some
-help on which overloaded version it is.
-
-To disambiguate functions overloaded on the const-ness of this object, use the
-`Const()` argument wrapper.
-
-```cpp
-using ::testing::ReturnRef;
-
-class MockFoo : public Foo {
-  ...
-  MOCK_METHOD(Bar&, GetBar, (), (override));
-  MOCK_METHOD(const Bar&, GetBar, (), (const, override));
-};
-
-...
-  MockFoo foo;
-  Bar bar1, bar2;
-  EXPECT_CALL(foo, GetBar())         // The non-const GetBar().
-      .WillOnce(ReturnRef(bar1));
-  EXPECT_CALL(Const(foo), GetBar())  // The const GetBar().
-      .WillOnce(ReturnRef(bar2));
-```
-
-(`Const()` is defined by gMock and returns a `const` reference to its argument.)
-
-To disambiguate overloaded functions with the same number of arguments but
-different argument types, you may need to specify the exact type of a matcher,
-either by wrapping your matcher in `Matcher<type>()`, or using a matcher whose
-type is fixed (`TypedEq<type>`, `An<type>()`, etc):
-
-```cpp
-using ::testing::An;
-using ::testing::Matcher;
-using ::testing::TypedEq;
-
-class MockPrinter : public Printer {
- public:
-  MOCK_METHOD(void, Print, (int n), (override));
-  MOCK_METHOD(void, Print, (char c), (override));
-};
-
-TEST(PrinterTest, Print) {
-  MockPrinter printer;
-
-  EXPECT_CALL(printer, Print(An<int>()));            // void Print(int);
-  EXPECT_CALL(printer, Print(Matcher<int>(Lt(5))));  // void Print(int);
-  EXPECT_CALL(printer, Print(TypedEq<char>('a')));   // void Print(char);
-
-  printer.Print(3);
-  printer.Print(6);
-  printer.Print('a');
-}
-```
-
-### Performing Different Actions Based on the Arguments
-
-When a mock method is called, the *last* matching expectation that's still
-active will be selected (think "newer overrides older"). So, you can make a
-method do different things depending on its argument values like this:
-
-```cpp
-using ::testing::_;
-using ::testing::Lt;
-using ::testing::Return;
-...
-  // The default case.
-  EXPECT_CALL(foo, DoThis(_))
-      .WillRepeatedly(Return('b'));
-  // The more specific case.
-  EXPECT_CALL(foo, DoThis(Lt(5)))
-      .WillRepeatedly(Return('a'));
-```
-
-Now, if `foo.DoThis()` is called with a value less than 5, `'a'` will be
-returned; otherwise `'b'` will be returned.
-
-### Matching Multiple Arguments as a Whole
-
-Sometimes it's not enough to match the arguments individually. For example, we
-may want to say that the first argument must be less than the second argument.
-The `With()` clause allows us to match all arguments of a mock function as a
-whole. For example,
-
-```cpp
-using ::testing::_;
-using ::testing::Ne;
-using ::testing::Lt;
-...
-  EXPECT_CALL(foo, InRange(Ne(0), _))
-      .With(Lt());
-```
-
-says that the first argument of `InRange()` must not be 0, and must be less than
-the second argument.
-
-The expression inside `With()` must be a matcher of type `Matcher<std::tuple<A1,
-..., An>>`, where `A1`, ..., `An` are the types of the function arguments.
-
-You can also write `AllArgs(m)` instead of `m` inside `.With()`. The two forms
-are equivalent, but `.With(AllArgs(Lt()))` is more readable than `.With(Lt())`.
-
-You can use `Args<k1, ..., kn>(m)` to match the `n` selected arguments (as a
-tuple) against `m`. For example,
-
-```cpp
-using ::testing::_;
-using ::testing::AllOf;
-using ::testing::Args;
-using ::testing::Lt;
-...
-  EXPECT_CALL(foo, Blah)
-      .With(AllOf(Args<0, 1>(Lt()), Args<1, 2>(Lt())));
-```
-
-says that `Blah` will be called with arguments `x`, `y`, and `z` where `x < y <
-z`. Note that in this example, it wasn't necessary specify the positional
-matchers.
-
-As a convenience and example, gMock provides some matchers for 2-tuples,
-including the `Lt()` matcher above. See
-[Multi-argument Matchers](reference/matchers.md#MultiArgMatchers) for the
-complete list.
-
-Note that if you want to pass the arguments to a predicate of your own (e.g.
-`.With(Args<0, 1>(Truly(&MyPredicate)))`), that predicate MUST be written to
-take a `std::tuple` as its argument; gMock will pass the `n` selected arguments
-as *one* single tuple to the predicate.
-
-### Using Matchers as Predicates
-
-Have you noticed that a matcher is just a fancy predicate that also knows how to
-describe itself? Many existing algorithms take predicates as arguments (e.g.
-those defined in STL's `<algorithm>` header), and it would be a shame if gMock
-matchers were not allowed to participate.
-
-Luckily, you can use a matcher where a unary predicate functor is expected by
-wrapping it inside the `Matches()` function. For example,
-
-```cpp
-#include <algorithm>
-#include <vector>
-
-using ::testing::Matches;
-using ::testing::Ge;
-
-vector<int> v;
-...
-// How many elements in v are >= 10?
-const int count = count_if(v.begin(), v.end(), Matches(Ge(10)));
-```
-
-Since you can build complex matchers from simpler ones easily using gMock, this
-gives you a way to conveniently construct composite predicates (doing the same
-using STL's `<functional>` header is just painful). For example, here's a
-predicate that's satisfied by any number that is >= 0, <= 100, and != 50:
-
-```cpp
-using testing::AllOf;
-using testing::Ge;
-using testing::Le;
-using testing::Matches;
-using testing::Ne;
-...
-Matches(AllOf(Ge(0), Le(100), Ne(50)))
-```
-
-### Using Matchers in googletest Assertions
-
-Since matchers are basically predicates that also know how to describe
-themselves, there is a way to take advantage of them in googletest assertions.
-It's called `ASSERT_THAT` and `EXPECT_THAT`:
-
-```cpp
-  ASSERT_THAT(value, matcher);  // Asserts that value matches matcher.
-  EXPECT_THAT(value, matcher);  // The non-fatal version.
-```
-
-For example, in a googletest test you can write:
-
-```cpp
-#include "gmock/gmock.h"
-
-using ::testing::AllOf;
-using ::testing::Ge;
-using ::testing::Le;
-using ::testing::MatchesRegex;
-using ::testing::StartsWith;
-
-...
-  EXPECT_THAT(Foo(), StartsWith("Hello"));
-  EXPECT_THAT(Bar(), MatchesRegex("Line \\d+"));
-  ASSERT_THAT(Baz(), AllOf(Ge(5), Le(10)));
-```
-
-which (as you can probably guess) executes `Foo()`, `Bar()`, and `Baz()`, and
-verifies that:
-
-*   `Foo()` returns a string that starts with `"Hello"`.
-*   `Bar()` returns a string that matches regular expression `"Line \\d+"`.
-*   `Baz()` returns a number in the range [5, 10].
-
-The nice thing about these macros is that *they read like English*. They
-generate informative messages too. For example, if the first `EXPECT_THAT()`
-above fails, the message will be something like:
-
-```cpp
-Value of: Foo()
-  Actual: "Hi, world!"
-Expected: starts with "Hello"
-```
-
-**Credit:** The idea of `(ASSERT|EXPECT)_THAT` was borrowed from Joe Walnes'
-Hamcrest project, which adds `assertThat()` to JUnit.
-
-### Using Predicates as Matchers
-
-gMock provides a set of built-in matchers for matching arguments with expected
-values—see the [Matchers Reference](reference/matchers.md) for more information.
-In case you find the built-in set lacking, you can use an arbitrary unary
-predicate function or functor as a matcher - as long as the predicate accepts a
-value of the type you want. You do this by wrapping the predicate inside the
-`Truly()` function, for example:
-
-```cpp
-using ::testing::Truly;
-
-int IsEven(int n) { return (n % 2) == 0 ? 1 : 0; }
-...
-  // Bar() must be called with an even number.
-  EXPECT_CALL(foo, Bar(Truly(IsEven)));
-```
-
-Note that the predicate function / functor doesn't have to return `bool`. It
-works as long as the return value can be used as the condition in in statement
-`if (condition) ...`.
-
-### Matching Arguments that Are Not Copyable
-
-When you do an `EXPECT_CALL(mock_obj, Foo(bar))`, gMock saves away a copy of
-`bar`. When `Foo()` is called later, gMock compares the argument to `Foo()` with
-the saved copy of `bar`. This way, you don't need to worry about `bar` being
-modified or destroyed after the `EXPECT_CALL()` is executed. The same is true
-when you use matchers like `Eq(bar)`, `Le(bar)`, and so on.
-
-But what if `bar` cannot be copied (i.e. has no copy constructor)? You could
-define your own matcher function or callback and use it with `Truly()`, as the
-previous couple of recipes have shown. Or, you may be able to get away from it
-if you can guarantee that `bar` won't be changed after the `EXPECT_CALL()` is
-executed. Just tell gMock that it should save a reference to `bar`, instead of a
-copy of it. Here's how:
-
-```cpp
-using ::testing::Eq;
-using ::testing::Lt;
-...
-  // Expects that Foo()'s argument == bar.
-  EXPECT_CALL(mock_obj, Foo(Eq(std::ref(bar))));
-
-  // Expects that Foo()'s argument < bar.
-  EXPECT_CALL(mock_obj, Foo(Lt(std::ref(bar))));
-```
-
-Remember: if you do this, don't change `bar` after the `EXPECT_CALL()`, or the
-result is undefined.
-
-### Validating a Member of an Object
-
-Often a mock function takes a reference to object as an argument. When matching
-the argument, you may not want to compare the entire object against a fixed
-object, as that may be over-specification. Instead, you may need to validate a
-certain member variable or the result of a certain getter method of the object.
-You can do this with `Field()` and `Property()`. More specifically,
-
-```cpp
-Field(&Foo::bar, m)
-```
-
-is a matcher that matches a `Foo` object whose `bar` member variable satisfies
-matcher `m`.
-
-```cpp
-Property(&Foo::baz, m)
-```
-
-is a matcher that matches a `Foo` object whose `baz()` method returns a value
-that satisfies matcher `m`.
-
-For example:
-
-| Expression                   | Description                              |
-| :--------------------------- | :--------------------------------------- |
-| `Field(&Foo::number, Ge(3))` | Matches `x` where `x.number >= 3`.       |
-| `Property(&Foo::name,  StartsWith("John "))` | Matches `x` where `x.name()` starts with  `"John "`. |
-
-Note that in `Property(&Foo::baz, ...)`, method `baz()` must take no argument
-and be declared as `const`. Don't use `Property()` against member functions that
-you do not own, because taking addresses of functions is fragile and generally
-not part of the contract of the function.
-
-`Field()` and `Property()` can also match plain pointers to objects. For
-instance,
-
-```cpp
-using ::testing::Field;
-using ::testing::Ge;
-...
-Field(&Foo::number, Ge(3))
-```
-
-matches a plain pointer `p` where `p->number >= 3`. If `p` is `NULL`, the match
-will always fail regardless of the inner matcher.
-
-What if you want to validate more than one members at the same time? Remember
-that there are [`AllOf()` and `AllOfArray()`](#CombiningMatchers).
-
-Finally `Field()` and `Property()` provide overloads that take the field or
-property names as the first argument to include it in the error message. This
-can be useful when creating combined matchers.
-
-```cpp
-using ::testing::AllOf;
-using ::testing::Field;
-using ::testing::Matcher;
-using ::testing::SafeMatcherCast;
-
-Matcher<Foo> IsFoo(const Foo& foo) {
-  return AllOf(Field("some_field", &Foo::some_field, foo.some_field),
-               Field("other_field", &Foo::other_field, foo.other_field),
-               Field("last_field", &Foo::last_field, foo.last_field));
-}
-```
-
-### Validating the Value Pointed to by a Pointer Argument
-
-C++ functions often take pointers as arguments. You can use matchers like
-`IsNull()`, `NotNull()`, and other comparison matchers to match a pointer, but
-what if you want to make sure the value *pointed to* by the pointer, instead of
-the pointer itself, has a certain property? Well, you can use the `Pointee(m)`
-matcher.
-
-`Pointee(m)` matches a pointer if and only if `m` matches the value the pointer
-points to. For example:
-
-```cpp
-using ::testing::Ge;
-using ::testing::Pointee;
-...
-  EXPECT_CALL(foo, Bar(Pointee(Ge(3))));
-```
-
-expects `foo.Bar()` to be called with a pointer that points to a value greater
-than or equal to 3.
-
-One nice thing about `Pointee()` is that it treats a `NULL` pointer as a match
-failure, so you can write `Pointee(m)` instead of
-
-```cpp
-using ::testing::AllOf;
-using ::testing::NotNull;
-using ::testing::Pointee;
-...
-  AllOf(NotNull(), Pointee(m))
-```
-
-without worrying that a `NULL` pointer will crash your test.
-
-Also, did we tell you that `Pointee()` works with both raw pointers **and**
-smart pointers (`std::unique_ptr`, `std::shared_ptr`, etc)?
-
-What if you have a pointer to pointer? You guessed it - you can use nested
-`Pointee()` to probe deeper inside the value. For example,
-`Pointee(Pointee(Lt(3)))` matches a pointer that points to a pointer that points
-to a number less than 3 (what a mouthful...).
-
-### Testing a Certain Property of an Object
-
-Sometimes you want to specify that an object argument has a certain property,
-but there is no existing matcher that does this. If you want good error
-messages, you should [define a matcher](#NewMatchers). If you want to do it
-quick and dirty, you could get away with writing an ordinary function.
-
-Let's say you have a mock function that takes an object of type `Foo`, which has
-an `int bar()` method and an `int baz()` method, and you want to constrain that
-the argument's `bar()` value plus its `baz()` value is a given number. Here's
-how you can define a matcher to do it:
-
-```cpp
-using ::testing::Matcher;
-
-class BarPlusBazEqMatcher {
- public:
-  explicit BarPlusBazEqMatcher(int expected_sum)
-      : expected_sum_(expected_sum) {}
-
-  bool MatchAndExplain(const Foo& foo,
-                       std::ostream* /* listener */) const {
-    return (foo.bar() + foo.baz()) == expected_sum_;
-  }
-
-  void DescribeTo(std::ostream& os) const {
-    os << "bar() + baz() equals " << expected_sum_;
-  }
-
-  void DescribeNegationTo(std::ostream& os) const {
-    os << "bar() + baz() does not equal " << expected_sum_;
-  }
- private:
-  const int expected_sum_;
-};
-
-Matcher<const Foo&> BarPlusBazEq(int expected_sum) {
-  return BarPlusBazEqMatcher(expected_sum);
-}
-
-...
-  EXPECT_CALL(..., DoThis(BarPlusBazEq(5)))...;
-```
-
-### Matching Containers
-
-Sometimes an STL container (e.g. list, vector, map, ...) is passed to a mock
-function and you may want to validate it. Since most STL containers support the
-`==` operator, you can write `Eq(expected_container)` or simply
-`expected_container` to match a container exactly.
-
-Sometimes, though, you may want to be more flexible (for example, the first
-element must be an exact match, but the second element can be any positive
-number, and so on). Also, containers used in tests often have a small number of
-elements, and having to define the expected container out-of-line is a bit of a
-hassle.
-
-You can use the `ElementsAre()` or `UnorderedElementsAre()` matcher in such
-cases:
-
-```cpp
-using ::testing::_;
-using ::testing::ElementsAre;
-using ::testing::Gt;
-...
-  MOCK_METHOD(void, Foo, (const vector<int>& numbers), (override));
-...
-  EXPECT_CALL(mock, Foo(ElementsAre(1, Gt(0), _, 5)));
-```
-
-The above matcher says that the container must have 4 elements, which must be 1,
-greater than 0, anything, and 5 respectively.
-
-If you instead write:
-
-```cpp
-using ::testing::_;
-using ::testing::Gt;
-using ::testing::UnorderedElementsAre;
-...
-  MOCK_METHOD(void, Foo, (const vector<int>& numbers), (override));
-...
-  EXPECT_CALL(mock, Foo(UnorderedElementsAre(1, Gt(0), _, 5)));
-```
-
-It means that the container must have 4 elements, which (under some permutation)
-must be 1, greater than 0, anything, and 5 respectively.
-
-As an alternative you can place the arguments in a C-style array and use
-`ElementsAreArray()` or `UnorderedElementsAreArray()` instead:
-
-```cpp
-using ::testing::ElementsAreArray;
-...
-  // ElementsAreArray accepts an array of element values.
-  const int expected_vector1[] = {1, 5, 2, 4, ...};
-  EXPECT_CALL(mock, Foo(ElementsAreArray(expected_vector1)));
-
-  // Or, an array of element matchers.
-  Matcher<int> expected_vector2[] = {1, Gt(2), _, 3, ...};
-  EXPECT_CALL(mock, Foo(ElementsAreArray(expected_vector2)));
-```
-
-In case the array needs to be dynamically created (and therefore the array size
-cannot be inferred by the compiler), you can give `ElementsAreArray()` an
-additional argument to specify the array size:
-
-```cpp
-using ::testing::ElementsAreArray;
-...
-  int* const expected_vector3 = new int[count];
-  ... fill expected_vector3 with values ...
-  EXPECT_CALL(mock, Foo(ElementsAreArray(expected_vector3, count)));
-```
-
-Use `Pair` when comparing maps or other associative containers.
-
-{% raw %}
-
-```cpp
-using testing::ElementsAre;
-using testing::Pair;
-...
-  std::map<string, int> m = {{"a", 1}, {"b", 2}, {"c", 3}};
-  EXPECT_THAT(m, ElementsAre(Pair("a", 1), Pair("b", 2), Pair("c", 3)));
-```
-
-{% endraw %}
-
-**Tips:**
-
-*   `ElementsAre*()` can be used to match *any* container that implements the
-    STL iterator pattern (i.e. it has a `const_iterator` type and supports
-    `begin()/end()`), not just the ones defined in STL. It will even work with
-    container types yet to be written - as long as they follows the above
-    pattern.
-*   You can use nested `ElementsAre*()` to match nested (multi-dimensional)
-    containers.
-*   If the container is passed by pointer instead of by reference, just write
-    `Pointee(ElementsAre*(...))`.
-*   The order of elements *matters* for `ElementsAre*()`. If you are using it
-    with containers whose element order are undefined (e.g. `hash_map`) you
-    should use `WhenSorted` around `ElementsAre`.
-
-### Sharing Matchers
-
-Under the hood, a gMock matcher object consists of a pointer to a ref-counted
-implementation object. Copying matchers is allowed and very efficient, as only
-the pointer is copied. When the last matcher that references the implementation
-object dies, the implementation object will be deleted.
-
-Therefore, if you have some complex matcher that you want to use again and
-again, there is no need to build it everytime. Just assign it to a matcher
-variable and use that variable repeatedly! For example,
-
-```cpp
-using ::testing::AllOf;
-using ::testing::Gt;
-using ::testing::Le;
-using ::testing::Matcher;
-...
-  Matcher<int> in_range = AllOf(Gt(5), Le(10));
-  ... use in_range as a matcher in multiple EXPECT_CALLs ...
-```
-
-### Matchers must have no side-effects {#PureMatchers}
-
-{: .callout .warning}
-WARNING: gMock does not guarantee when or how many times a matcher will be
-invoked. Therefore, all matchers must be *purely functional*: they cannot have
-any side effects, and the match result must not depend on anything other than
-the matcher's parameters and the value being matched.
-
-This requirement must be satisfied no matter how a matcher is defined (e.g., if
-it is one of the standard matchers, or a custom matcher). In particular, a
-matcher can never call a mock function, as that will affect the state of the
-mock object and gMock.
-
-## Setting Expectations
-
-### Knowing When to Expect {#UseOnCall}
-
-**`ON_CALL`** is likely the *single most under-utilized construct* in gMock.
-
-There are basically two constructs for defining the behavior of a mock object:
-`ON_CALL` and `EXPECT_CALL`. The difference? `ON_CALL` defines what happens when
-a mock method is called, but <em>doesn't imply any expectation on the method
-being called</em>. `EXPECT_CALL` not only defines the behavior, but also sets an
-expectation that <em>the method will be called with the given arguments, for the
-given number of times</em> (and *in the given order* when you specify the order
-too).
-
-Since `EXPECT_CALL` does more, isn't it better than `ON_CALL`? Not really. Every
-`EXPECT_CALL` adds a constraint on the behavior of the code under test. Having
-more constraints than necessary is *baaad* - even worse than not having enough
-constraints.
-
-This may be counter-intuitive. How could tests that verify more be worse than
-tests that verify less? Isn't verification the whole point of tests?
-
-The answer lies in *what* a test should verify. **A good test verifies the
-contract of the code.** If a test over-specifies, it doesn't leave enough
-freedom to the implementation. As a result, changing the implementation without
-breaking the contract (e.g. refactoring and optimization), which should be
-perfectly fine to do, can break such tests. Then you have to spend time fixing
-them, only to see them broken again the next time the implementation is changed.
-
-Keep in mind that one doesn't have to verify more than one property in one test.
-In fact, **it's a good style to verify only one thing in one test.** If you do
-that, a bug will likely break only one or two tests instead of dozens (which
-case would you rather debug?). If you are also in the habit of giving tests
-descriptive names that tell what they verify, you can often easily guess what's
-wrong just from the test log itself.
-
-So use `ON_CALL` by default, and only use `EXPECT_CALL` when you actually intend
-to verify that the call is made. For example, you may have a bunch of `ON_CALL`s
-in your test fixture to set the common mock behavior shared by all tests in the
-same group, and write (scarcely) different `EXPECT_CALL`s in different `TEST_F`s
-to verify different aspects of the code's behavior. Compared with the style
-where each `TEST` has many `EXPECT_CALL`s, this leads to tests that are more
-resilient to implementational changes (and thus less likely to require
-maintenance) and makes the intent of the tests more obvious (so they are easier
-to maintain when you do need to maintain them).
-
-If you are bothered by the "Uninteresting mock function call" message printed
-when a mock method without an `EXPECT_CALL` is called, you may use a `NiceMock`
-instead to suppress all such messages for the mock object, or suppress the
-message for specific methods by adding `EXPECT_CALL(...).Times(AnyNumber())`. DO
-NOT suppress it by blindly adding an `EXPECT_CALL(...)`, or you'll have a test
-that's a pain to maintain.
-
-### Ignoring Uninteresting Calls
-
-If you are not interested in how a mock method is called, just don't say
-anything about it. In this case, if the method is ever called, gMock will
-perform its default action to allow the test program to continue. If you are not
-happy with the default action taken by gMock, you can override it using
-`DefaultValue<T>::Set()` (described [here](#DefaultValue)) or `ON_CALL()`.
-
-Please note that once you expressed interest in a particular mock method (via
-`EXPECT_CALL()`), all invocations to it must match some expectation. If this
-function is called but the arguments don't match any `EXPECT_CALL()` statement,
-it will be an error.
-
-### Disallowing Unexpected Calls
-
-If a mock method shouldn't be called at all, explicitly say so:
-
-```cpp
-using ::testing::_;
-...
-  EXPECT_CALL(foo, Bar(_))
-      .Times(0);
-```
-
-If some calls to the method are allowed, but the rest are not, just list all the
-expected calls:
-
-```cpp
-using ::testing::AnyNumber;
-using ::testing::Gt;
-...
-  EXPECT_CALL(foo, Bar(5));
-  EXPECT_CALL(foo, Bar(Gt(10)))
-      .Times(AnyNumber());
-```
-
-A call to `foo.Bar()` that doesn't match any of the `EXPECT_CALL()` statements
-will be an error.
-
-### Understanding Uninteresting vs Unexpected Calls {#uninteresting-vs-unexpected}
-
-*Uninteresting* calls and *unexpected* calls are different concepts in gMock.
-*Very* different.
-
-A call `x.Y(...)` is **uninteresting** if there's *not even a single*
-`EXPECT_CALL(x, Y(...))` set. In other words, the test isn't interested in the
-`x.Y()` method at all, as evident in that the test doesn't care to say anything
-about it.
-
-A call `x.Y(...)` is **unexpected** if there are *some* `EXPECT_CALL(x,
-Y(...))`s set, but none of them matches the call. Put another way, the test is
-interested in the `x.Y()` method (therefore it explicitly sets some
-`EXPECT_CALL` to verify how it's called); however, the verification fails as the
-test doesn't expect this particular call to happen.
-
-**An unexpected call is always an error,** as the code under test doesn't behave
-the way the test expects it to behave.
-
-**By default, an uninteresting call is not an error,** as it violates no
-constraint specified by the test. (gMock's philosophy is that saying nothing
-means there is no constraint.) However, it leads to a warning, as it *might*
-indicate a problem (e.g. the test author might have forgotten to specify a
-constraint).
-
-In gMock, `NiceMock` and `StrictMock` can be used to make a mock class "nice" or
-"strict". How does this affect uninteresting calls and unexpected calls?
-
-A **nice mock** suppresses uninteresting call *warnings*. It is less chatty than
-the default mock, but otherwise is the same. If a test fails with a default
-mock, it will also fail using a nice mock instead. And vice versa. Don't expect
-making a mock nice to change the test's result.
-
-A **strict mock** turns uninteresting call warnings into errors. So making a
-mock strict may change the test's result.
-
-Let's look at an example:
-
-```cpp
-TEST(...) {
-  NiceMock<MockDomainRegistry> mock_registry;
-  EXPECT_CALL(mock_registry, GetDomainOwner("google.com"))
-          .WillRepeatedly(Return("Larry Page"));
-
-  // Use mock_registry in code under test.
-  ... &mock_registry ...
-}
-```
-
-The sole `EXPECT_CALL` here says that all calls to `GetDomainOwner()` must have
-`"google.com"` as the argument. If `GetDomainOwner("yahoo.com")` is called, it
-will be an unexpected call, and thus an error. *Having a nice mock doesn't
-change the severity of an unexpected call.*
-
-So how do we tell gMock that `GetDomainOwner()` can be called with some other
-arguments as well? The standard technique is to add a "catch all" `EXPECT_CALL`:
-
-```cpp
-  EXPECT_CALL(mock_registry, GetDomainOwner(_))
-        .Times(AnyNumber());  // catches all other calls to this method.
-  EXPECT_CALL(mock_registry, GetDomainOwner("google.com"))
-        .WillRepeatedly(Return("Larry Page"));
-```
-
-Remember that `_` is the wildcard matcher that matches anything. With this, if
-`GetDomainOwner("google.com")` is called, it will do what the second
-`EXPECT_CALL` says; if it is called with a different argument, it will do what
-the first `EXPECT_CALL` says.
-
-Note that the order of the two `EXPECT_CALL`s is important, as a newer
-`EXPECT_CALL` takes precedence over an older one.
-
-For more on uninteresting calls, nice mocks, and strict mocks, read
-["The Nice, the Strict, and the Naggy"](#NiceStrictNaggy).
-
-### Ignoring Uninteresting Arguments {#ParameterlessExpectations}
-
-If your test doesn't care about the parameters (it only cares about the number
-or order of calls), you can often simply omit the parameter list:
-
-```cpp
-  // Expect foo.Bar( ... ) twice with any arguments.
-  EXPECT_CALL(foo, Bar).Times(2);
-
-  // Delegate to the given method whenever the factory is invoked.
-  ON_CALL(foo_factory, MakeFoo)
-      .WillByDefault(&BuildFooForTest);
-```
-
-This functionality is only available when a method is not overloaded; to prevent
-unexpected behavior it is a compilation error to try to set an expectation on a
-method where the specific overload is ambiguous. You can work around this by
-supplying a [simpler mock interface](#SimplerInterfaces) than the mocked class
-provides.
-
-This pattern is also useful when the arguments are interesting, but match logic
-is substantially complex. You can leave the argument list unspecified and use
-SaveArg actions to [save the values for later verification](#SaveArgVerify). If
-you do that, you can easily differentiate calling the method the wrong number of
-times from calling it with the wrong arguments.
-
-### Expecting Ordered Calls {#OrderedCalls}
-
-Although an `EXPECT_CALL()` statement defined later takes precedence when gMock
-tries to match a function call with an expectation, by default calls don't have
-to happen in the order `EXPECT_CALL()` statements are written. For example, if
-the arguments match the matchers in the second `EXPECT_CALL()`, but not those in
-the first and third, then the second expectation will be used.
-
-If you would rather have all calls occur in the order of the expectations, put
-the `EXPECT_CALL()` statements in a block where you define a variable of type
-`InSequence`:
-
-```cpp
-using ::testing::_;
-using ::testing::InSequence;
-
-  {
-    InSequence s;
-
-    EXPECT_CALL(foo, DoThis(5));
-    EXPECT_CALL(bar, DoThat(_))
-        .Times(2);
-    EXPECT_CALL(foo, DoThis(6));
-  }
-```
-
-In this example, we expect a call to `foo.DoThis(5)`, followed by two calls to
-`bar.DoThat()` where the argument can be anything, which are in turn followed by
-a call to `foo.DoThis(6)`. If a call occurred out-of-order, gMock will report an
-error.
-
-### Expecting Partially Ordered Calls {#PartialOrder}
-
-Sometimes requiring everything to occur in a predetermined order can lead to
-brittle tests. For example, we may care about `A` occurring before both `B` and
-`C`, but aren't interested in the relative order of `B` and `C`. In this case,
-the test should reflect our real intent, instead of being overly constraining.
-
-gMock allows you to impose an arbitrary DAG (directed acyclic graph) on the
-calls. One way to express the DAG is to use the
-[After](gmock_cheat_sheet.md#AfterClause) clause of `EXPECT_CALL`.
-
-Another way is via the `InSequence()` clause (not the same as the `InSequence`
-class), which we borrowed from jMock 2. It's less flexible than `After()`, but
-more convenient when you have long chains of sequential calls, as it doesn't
-require you to come up with different names for the expectations in the chains.
-Here's how it works:
-
-If we view `EXPECT_CALL()` statements as nodes in a graph, and add an edge from
-node A to node B wherever A must occur before B, we can get a DAG. We use the
-term "sequence" to mean a directed path in this DAG. Now, if we decompose the
-DAG into sequences, we just need to know which sequences each `EXPECT_CALL()`
-belongs to in order to be able to reconstruct the original DAG.
-
-So, to specify the partial order on the expectations we need to do two things:
-first to define some `Sequence` objects, and then for each `EXPECT_CALL()` say
-which `Sequence` objects it is part of.
-
-Expectations in the same sequence must occur in the order they are written. For
-example,
-
-```cpp
-using ::testing::Sequence;
-...
-  Sequence s1, s2;
-
-  EXPECT_CALL(foo, A())
-      .InSequence(s1, s2);
-  EXPECT_CALL(bar, B())
-      .InSequence(s1);
-  EXPECT_CALL(bar, C())
-      .InSequence(s2);
-  EXPECT_CALL(foo, D())
-      .InSequence(s2);
-```
-
-specifies the following DAG (where `s1` is `A -> B`, and `s2` is `A -> C -> D`):
-
-```text
-       +---> B
-       |
-  A ---|
-       |
-        +---> C ---> D
-```
-
-This means that A must occur before B and C, and C must occur before D. There's
-no restriction about the order other than these.
-
-### Controlling When an Expectation Retires
-
-When a mock method is called, gMock only considers expectations that are still
-active. An expectation is active when created, and becomes inactive (aka
-*retires*) when a call that has to occur later has occurred. For example, in
-
-```cpp
-using ::testing::_;
-using ::testing::Sequence;
-...
-  Sequence s1, s2;
-
-  EXPECT_CALL(log, Log(WARNING, _, "File too large."))      // #1
-      .Times(AnyNumber())
-      .InSequence(s1, s2);
-  EXPECT_CALL(log, Log(WARNING, _, "Data set is empty."))   // #2
-      .InSequence(s1);
-  EXPECT_CALL(log, Log(WARNING, _, "User not found."))      // #3
-      .InSequence(s2);
-```
-
-as soon as either #2 or #3 is matched, #1 will retire. If a warning `"File too
-large."` is logged after this, it will be an error.
-
-Note that an expectation doesn't retire automatically when it's saturated. For
-example,
-
-```cpp
-using ::testing::_;
-...
-  EXPECT_CALL(log, Log(WARNING, _, _));                     // #1
-  EXPECT_CALL(log, Log(WARNING, _, "File too large."));     // #2
-```
-
-says that there will be exactly one warning with the message `"File too
-large."`. If the second warning contains this message too, #2 will match again
-and result in an upper-bound-violated error.
-
-If this is not what you want, you can ask an expectation to retire as soon as it
-becomes saturated:
-
-```cpp
-using ::testing::_;
-...
-  EXPECT_CALL(log, Log(WARNING, _, _));                     // #1
-  EXPECT_CALL(log, Log(WARNING, _, "File too large."))      // #2
-      .RetiresOnSaturation();
-```
-
-Here #2 can be used only once, so if you have two warnings with the message
-`"File too large."`, the first will match #2 and the second will match #1 -
-there will be no error.
-
-## Using Actions
-
-### Returning References from Mock Methods
-
-If a mock function's return type is a reference, you need to use `ReturnRef()`
-instead of `Return()` to return a result:
-
-```cpp
-using ::testing::ReturnRef;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(Bar&, GetBar, (), (override));
-};
-...
-  MockFoo foo;
-  Bar bar;
-  EXPECT_CALL(foo, GetBar())
-      .WillOnce(ReturnRef(bar));
-...
-```
-
-### Returning Live Values from Mock Methods
-
-The `Return(x)` action saves a copy of `x` when the action is created, and
-always returns the same value whenever it's executed. Sometimes you may want to
-instead return the *live* value of `x` (i.e. its value at the time when the
-action is *executed*.). Use either `ReturnRef()` or `ReturnPointee()` for this
-purpose.
-
-If the mock function's return type is a reference, you can do it using
-`ReturnRef(x)`, as shown in the previous recipe ("Returning References from Mock
-Methods"). However, gMock doesn't let you use `ReturnRef()` in a mock function
-whose return type is not a reference, as doing that usually indicates a user
-error. So, what shall you do?
-
-Though you may be tempted, DO NOT use `std::ref()`:
-
-```cpp
-using testing::Return;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(int, GetValue, (), (override));
-};
-...
-  int x = 0;
-  MockFoo foo;
-  EXPECT_CALL(foo, GetValue())
-      .WillRepeatedly(Return(std::ref(x)));  // Wrong!
-  x = 42;
-  EXPECT_EQ(42, foo.GetValue());
-```
-
-Unfortunately, it doesn't work here. The above code will fail with error:
-
-```text
-Value of: foo.GetValue()
-  Actual: 0
-Expected: 42
-```
-
-The reason is that `Return(*value*)` converts `value` to the actual return type
-of the mock function at the time when the action is *created*, not when it is
-*executed*. (This behavior was chosen for the action to be safe when `value` is
-a proxy object that references some temporary objects.) As a result,
-`std::ref(x)` is converted to an `int` value (instead of a `const int&`) when
-the expectation is set, and `Return(std::ref(x))` will always return 0.
-
-`ReturnPointee(pointer)` was provided to solve this problem specifically. It
-returns the value pointed to by `pointer` at the time the action is *executed*:
-
-```cpp
-using testing::ReturnPointee;
-...
-  int x = 0;
-  MockFoo foo;
-  EXPECT_CALL(foo, GetValue())
-      .WillRepeatedly(ReturnPointee(&x));  // Note the & here.
-  x = 42;
-  EXPECT_EQ(42, foo.GetValue());  // This will succeed now.
-```
-
-### Combining Actions
-
-Want to do more than one thing when a function is called? That's fine. `DoAll()`
-allow you to do sequence of actions every time. Only the return value of the
-last action in the sequence will be used.
-
-```cpp
-using ::testing::_;
-using ::testing::DoAll;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(bool, Bar, (int n), (override));
-};
-...
-  EXPECT_CALL(foo, Bar(_))
-      .WillOnce(DoAll(action_1,
-                      action_2,
-                      ...
-                      action_n));
-```
-
-### Verifying Complex Arguments {#SaveArgVerify}
-
-If you want to verify that a method is called with a particular argument but the
-match criteria is complex, it can be difficult to distinguish between
-cardinality failures (calling the method the wrong number of times) and argument
-match failures. Similarly, if you are matching multiple parameters, it may not
-be easy to distinguishing which argument failed to match. For example:
-
-```cpp
-  // Not ideal: this could fail because of a problem with arg1 or arg2, or maybe
-  // just the method wasn't called.
-  EXPECT_CALL(foo, SendValues(_, ElementsAre(1, 4, 4, 7), EqualsProto( ... )));
-```
-
-You can instead save the arguments and test them individually:
-
-```cpp
-  EXPECT_CALL(foo, SendValues)
-      .WillOnce(DoAll(SaveArg<1>(&actual_array), SaveArg<2>(&actual_proto)));
-  ... run the test
-  EXPECT_THAT(actual_array, ElementsAre(1, 4, 4, 7));
-  EXPECT_THAT(actual_proto, EqualsProto( ... ));
-```
-
-### Mocking Side Effects {#MockingSideEffects}
-
-Sometimes a method exhibits its effect not via returning a value but via side
-effects. For example, it may change some global state or modify an output
-argument. To mock side effects, in general you can define your own action by
-implementing `::testing::ActionInterface`.
-
-If all you need to do is to change an output argument, the built-in
-`SetArgPointee()` action is convenient:
-
-```cpp
-using ::testing::_;
-using ::testing::SetArgPointee;
-
-class MockMutator : public Mutator {
- public:
-  MOCK_METHOD(void, Mutate, (bool mutate, int* value), (override));
-  ...
-}
-...
-  MockMutator mutator;
-  EXPECT_CALL(mutator, Mutate(true, _))
-      .WillOnce(SetArgPointee<1>(5));
-```
-
-In this example, when `mutator.Mutate()` is called, we will assign 5 to the
-`int` variable pointed to by argument #1 (0-based).
-
-`SetArgPointee()` conveniently makes an internal copy of the value you pass to
-it, removing the need to keep the value in scope and alive. The implication
-however is that the value must have a copy constructor and assignment operator.
-
-If the mock method also needs to return a value as well, you can chain
-`SetArgPointee()` with `Return()` using `DoAll()`, remembering to put the
-`Return()` statement last:
-
-```cpp
-using ::testing::_;
-using ::testing::Return;
-using ::testing::SetArgPointee;
-
-class MockMutator : public Mutator {
- public:
-  ...
-  MOCK_METHOD(bool, MutateInt, (int* value), (override));
-}
-...
-  MockMutator mutator;
-  EXPECT_CALL(mutator, MutateInt(_))
-      .WillOnce(DoAll(SetArgPointee<0>(5),
-                      Return(true)));
-```
-
-Note, however, that if you use the `ReturnOKWith()` method, it will override the
-values provided by `SetArgPointee()` in the response parameters of your function
-call.
-
-If the output argument is an array, use the `SetArrayArgument<N>(first, last)`
-action instead. It copies the elements in source range `[first, last)` to the
-array pointed to by the `N`-th (0-based) argument:
-
-```cpp
-using ::testing::NotNull;
-using ::testing::SetArrayArgument;
-
-class MockArrayMutator : public ArrayMutator {
- public:
-  MOCK_METHOD(void, Mutate, (int* values, int num_values), (override));
-  ...
-}
-...
-  MockArrayMutator mutator;
-  int values[5] = {1, 2, 3, 4, 5};
-  EXPECT_CALL(mutator, Mutate(NotNull(), 5))
-      .WillOnce(SetArrayArgument<0>(values, values + 5));
-```
-
-This also works when the argument is an output iterator:
-
-```cpp
-using ::testing::_;
-using ::testing::SetArrayArgument;
-
-class MockRolodex : public Rolodex {
- public:
-  MOCK_METHOD(void, GetNames, (std::back_insert_iterator<vector<string>>),
-              (override));
-  ...
-}
-...
-  MockRolodex rolodex;
-  vector<string> names;
-  names.push_back("George");
-  names.push_back("John");
-  names.push_back("Thomas");
-  EXPECT_CALL(rolodex, GetNames(_))
-      .WillOnce(SetArrayArgument<0>(names.begin(), names.end()));
-```
-
-### Changing a Mock Object's Behavior Based on the State
-
-If you expect a call to change the behavior of a mock object, you can use
-`::testing::InSequence` to specify different behaviors before and after the
-call:
-
-```cpp
-using ::testing::InSequence;
-using ::testing::Return;
-
-...
-  {
-     InSequence seq;
-     EXPECT_CALL(my_mock, IsDirty())
-         .WillRepeatedly(Return(true));
-     EXPECT_CALL(my_mock, Flush());
-     EXPECT_CALL(my_mock, IsDirty())
-         .WillRepeatedly(Return(false));
-  }
-  my_mock.FlushIfDirty();
-```
-
-This makes `my_mock.IsDirty()` return `true` before `my_mock.Flush()` is called
-and return `false` afterwards.
-
-If the behavior change is more complex, you can store the effects in a variable
-and make a mock method get its return value from that variable:
-
-```cpp
-using ::testing::_;
-using ::testing::SaveArg;
-using ::testing::Return;
-
-ACTION_P(ReturnPointee, p) { return *p; }
-...
-  int previous_value = 0;
-  EXPECT_CALL(my_mock, GetPrevValue)
-      .WillRepeatedly(ReturnPointee(&previous_value));
-  EXPECT_CALL(my_mock, UpdateValue)
-      .WillRepeatedly(SaveArg<0>(&previous_value));
-  my_mock.DoSomethingToUpdateValue();
-```
-
-Here `my_mock.GetPrevValue()` will always return the argument of the last
-`UpdateValue()` call.
-
-### Setting the Default Value for a Return Type {#DefaultValue}
-
-If a mock method's return type is a built-in C++ type or pointer, by default it
-will return 0 when invoked. Also, in C++ 11 and above, a mock method whose
-return type has a default constructor will return a default-constructed value by
-default. You only need to specify an action if this default value doesn't work
-for you.
-
-Sometimes, you may want to change this default value, or you may want to specify
-a default value for types gMock doesn't know about. You can do this using the
-`::testing::DefaultValue` class template:
-
-```cpp
-using ::testing::DefaultValue;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(Bar, CalculateBar, (), (override));
-};
-
-
-...
-  Bar default_bar;
-  // Sets the default return value for type Bar.
-  DefaultValue<Bar>::Set(default_bar);
-
-  MockFoo foo;
-
-  // We don't need to specify an action here, as the default
-  // return value works for us.
-  EXPECT_CALL(foo, CalculateBar());
-
-  foo.CalculateBar();  // This should return default_bar.
-
-  // Unsets the default return value.
-  DefaultValue<Bar>::Clear();
-```
-
-Please note that changing the default value for a type can make your tests hard
-to understand. We recommend you to use this feature judiciously. For example,
-you may want to make sure the `Set()` and `Clear()` calls are right next to the
-code that uses your mock.
-
-### Setting the Default Actions for a Mock Method
-
-You've learned how to change the default value of a given type. However, this
-may be too coarse for your purpose: perhaps you have two mock methods with the
-same return type and you want them to have different behaviors. The `ON_CALL()`
-macro allows you to customize your mock's behavior at the method level:
-
-```cpp
-using ::testing::_;
-using ::testing::AnyNumber;
-using ::testing::Gt;
-using ::testing::Return;
-...
-  ON_CALL(foo, Sign(_))
-      .WillByDefault(Return(-1));
-  ON_CALL(foo, Sign(0))
-      .WillByDefault(Return(0));
-  ON_CALL(foo, Sign(Gt(0)))
-      .WillByDefault(Return(1));
-
-  EXPECT_CALL(foo, Sign(_))
-      .Times(AnyNumber());
-
-  foo.Sign(5);   // This should return 1.
-  foo.Sign(-9);  // This should return -1.
-  foo.Sign(0);   // This should return 0.
-```
-
-As you may have guessed, when there are more than one `ON_CALL()` statements,
-the newer ones in the order take precedence over the older ones. In other words,
-the **last** one that matches the function arguments will be used. This matching
-order allows you to set up the common behavior in a mock object's constructor or
-the test fixture's set-up phase and specialize the mock's behavior later.
-
-Note that both `ON_CALL` and `EXPECT_CALL` have the same "later statements take
-precedence" rule, but they don't interact. That is, `EXPECT_CALL`s have their
-own precedence order distinct from the `ON_CALL` precedence order.
-
-### Using Functions/Methods/Functors/Lambdas as Actions {#FunctionsAsActions}
-
-If the built-in actions don't suit you, you can use an existing callable
-(function, `std::function`, method, functor, lambda) as an action.
-
-```cpp
-using ::testing::_; using ::testing::Invoke;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(int, Sum, (int x, int y), (override));
-  MOCK_METHOD(bool, ComplexJob, (int x), (override));
-};
-
-int CalculateSum(int x, int y) { return x + y; }
-int Sum3(int x, int y, int z) { return x + y + z; }
-
-class Helper {
- public:
-  bool ComplexJob(int x);
-};
-
-...
-  MockFoo foo;
-  Helper helper;
-  EXPECT_CALL(foo, Sum(_, _))
-      .WillOnce(&CalculateSum)
-      .WillRepeatedly(Invoke(NewPermanentCallback(Sum3, 1)));
-  EXPECT_CALL(foo, ComplexJob(_))
-      .WillOnce(Invoke(&helper, &Helper::ComplexJob))
-      .WillOnce([] { return true; })
-      .WillRepeatedly([](int x) { return x > 0; });
-
-  foo.Sum(5, 6);         // Invokes CalculateSum(5, 6).
-  foo.Sum(2, 3);         // Invokes Sum3(1, 2, 3).
-  foo.ComplexJob(10);    // Invokes helper.ComplexJob(10).
-  foo.ComplexJob(-1);    // Invokes the inline lambda.
-```
-
-The only requirement is that the type of the function, etc must be *compatible*
-with the signature of the mock function, meaning that the latter's arguments (if
-it takes any) can be implicitly converted to the corresponding arguments of the
-former, and the former's return type can be implicitly converted to that of the
-latter. So, you can invoke something whose type is *not* exactly the same as the
-mock function, as long as it's safe to do so - nice, huh?
-
-Note that:
-
-*   The action takes ownership of the callback and will delete it when the
-    action itself is destructed.
-*   If the type of a callback is derived from a base callback type `C`, you need
-    to implicitly cast it to `C` to resolve the overloading, e.g.
-
-    ```cpp
-    using ::testing::Invoke;
-    ...
-      ResultCallback<bool>* is_ok = ...;
-      ... Invoke(is_ok) ...;  // This works.
-
-      BlockingClosure* done = new BlockingClosure;
-      ... Invoke(implicit_cast<Closure*>(done)) ...;  // The cast is necessary.
-    ```
-
-### Using Functions with Extra Info as Actions
-
-The function or functor you call using `Invoke()` must have the same number of
-arguments as the mock function you use it for. Sometimes you may have a function
-that takes more arguments, and you are willing to pass in the extra arguments
-yourself to fill the gap. You can do this in gMock using callbacks with
-pre-bound arguments. Here's an example:
-
-```cpp
-using ::testing::Invoke;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(char, DoThis, (int n), (override));
-};
-
-char SignOfSum(int x, int y) {
-  const int sum = x + y;
-  return (sum > 0) ? '+' : (sum < 0) ? '-' : '0';
-}
-
-TEST_F(FooTest, Test) {
-  MockFoo foo;
-
-  EXPECT_CALL(foo, DoThis(2))
-      .WillOnce(Invoke(NewPermanentCallback(SignOfSum, 5)));
-  EXPECT_EQ('+', foo.DoThis(2));  // Invokes SignOfSum(5, 2).
-}
-```
-
-### Invoking a Function/Method/Functor/Lambda/Callback Without Arguments
-
-`Invoke()` passes the mock function's arguments to the function, etc being
-invoked such that the callee has the full context of the call to work with. If
-the invoked function is not interested in some or all of the arguments, it can
-simply ignore them.
-
-Yet, a common pattern is that a test author wants to invoke a function without
-the arguments of the mock function. She could do that using a wrapper function
-that throws away the arguments before invoking an underlining nullary function.
-Needless to say, this can be tedious and obscures the intent of the test.
-
-There are two solutions to this problem. First, you can pass any callable of
-zero args as an action. Alternatively, use `InvokeWithoutArgs()`, which is like
-`Invoke()` except that it doesn't pass the mock function's arguments to the
-callee. Here's an example of each:
-
-```cpp
-using ::testing::_;
-using ::testing::InvokeWithoutArgs;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(bool, ComplexJob, (int n), (override));
-};
-
-bool Job1() { ... }
-bool Job2(int n, char c) { ... }
-
-...
-  MockFoo foo;
-  EXPECT_CALL(foo, ComplexJob(_))
-      .WillOnce([] { Job1(); });
-      .WillOnce(InvokeWithoutArgs(NewPermanentCallback(Job2, 5, 'a')));
-
-  foo.ComplexJob(10);  // Invokes Job1().
-  foo.ComplexJob(20);  // Invokes Job2(5, 'a').
-```
-
-Note that:
-
-*   The action takes ownership of the callback and will delete it when the
-    action itself is destructed.
-*   If the type of a callback is derived from a base callback type `C`, you need
-    to implicitly cast it to `C` to resolve the overloading, e.g.
-
-    ```cpp
-    using ::testing::InvokeWithoutArgs;
-    ...
-      ResultCallback<bool>* is_ok = ...;
-      ... InvokeWithoutArgs(is_ok) ...;  // This works.
-
-      BlockingClosure* done = ...;
-      ... InvokeWithoutArgs(implicit_cast<Closure*>(done)) ...;
-      // The cast is necessary.
-    ```
-
-### Invoking an Argument of the Mock Function
-
-Sometimes a mock function will receive a function pointer, a functor (in other
-words, a "callable") as an argument, e.g.
-
-```cpp
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(bool, DoThis, (int n, (ResultCallback1<bool, int>* callback)),
-              (override));
-};
-```
-
-and you may want to invoke this callable argument:
-
-```cpp
-using ::testing::_;
-...
-  MockFoo foo;
-  EXPECT_CALL(foo, DoThis(_, _))
-      .WillOnce(...);
-      // Will execute callback->Run(5), where callback is the
-      // second argument DoThis() receives.
-```
-
-{: .callout .note}
-NOTE: The section below is legacy documentation from before C++ had lambdas:
-
-Arghh, you need to refer to a mock function argument but C++ has no lambda
-(yet), so you have to define your own action. :-( Or do you really?
-
-Well, gMock has an action to solve *exactly* this problem:
-
-```cpp
-InvokeArgument<N>(arg_1, arg_2, ..., arg_m)
-```
-
-will invoke the `N`-th (0-based) argument the mock function receives, with
-`arg_1`, `arg_2`, ..., and `arg_m`. No matter if the argument is a function
-pointer, a functor, or a callback. gMock handles them all.
-
-With that, you could write:
-
-```cpp
-using ::testing::_;
-using ::testing::InvokeArgument;
-...
-  EXPECT_CALL(foo, DoThis(_, _))
-      .WillOnce(InvokeArgument<1>(5));
-      // Will execute callback->Run(5), where callback is the
-      // second argument DoThis() receives.
-```
-
-What if the callable takes an argument by reference? No problem - just wrap it
-inside `std::ref()`:
-
-```cpp
-  ...
-  MOCK_METHOD(bool, Bar,
-              ((ResultCallback2<bool, int, const Helper&>* callback)),
-              (override));
-  ...
-  using ::testing::_;
-  using ::testing::InvokeArgument;
-  ...
-  MockFoo foo;
-  Helper helper;
-  ...
-  EXPECT_CALL(foo, Bar(_))
-      .WillOnce(InvokeArgument<0>(5, std::ref(helper)));
-      // std::ref(helper) guarantees that a reference to helper, not a copy of
-      // it, will be passed to the callback.
-```
-
-What if the callable takes an argument by reference and we do **not** wrap the
-argument in `std::ref()`? Then `InvokeArgument()` will *make a copy* of the
-argument, and pass a *reference to the copy*, instead of a reference to the
-original value, to the callable. This is especially handy when the argument is a
-temporary value:
-
-```cpp
-  ...
-  MOCK_METHOD(bool, DoThat, (bool (*f)(const double& x, const string& s)),
-              (override));
-  ...
-  using ::testing::_;
-  using ::testing::InvokeArgument;
-  ...
-  MockFoo foo;
-  ...
-  EXPECT_CALL(foo, DoThat(_))
-      .WillOnce(InvokeArgument<0>(5.0, string("Hi")));
-      // Will execute (*f)(5.0, string("Hi")), where f is the function pointer
-      // DoThat() receives.  Note that the values 5.0 and string("Hi") are
-      // temporary and dead once the EXPECT_CALL() statement finishes.  Yet
-      // it's fine to perform this action later, since a copy of the values
-      // are kept inside the InvokeArgument action.
-```
-
-### Ignoring an Action's Result
-
-Sometimes you have an action that returns *something*, but you need an action
-that returns `void` (perhaps you want to use it in a mock function that returns
-`void`, or perhaps it needs to be used in `DoAll()` and it's not the last in the
-list). `IgnoreResult()` lets you do that. For example:
-
-```cpp
-using ::testing::_;
-using ::testing::DoAll;
-using ::testing::IgnoreResult;
-using ::testing::Return;
-
-int Process(const MyData& data);
-string DoSomething();
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(void, Abc, (const MyData& data), (override));
-  MOCK_METHOD(bool, Xyz, (), (override));
-};
-
-  ...
-  MockFoo foo;
-  EXPECT_CALL(foo, Abc(_))
-      // .WillOnce(Invoke(Process));
-      // The above line won't compile as Process() returns int but Abc() needs
-      // to return void.
-      .WillOnce(IgnoreResult(Process));
-  EXPECT_CALL(foo, Xyz())
-      .WillOnce(DoAll(IgnoreResult(DoSomething),
-                      // Ignores the string DoSomething() returns.
-                      Return(true)));
-```
-
-Note that you **cannot** use `IgnoreResult()` on an action that already returns
-`void`. Doing so will lead to ugly compiler errors.
-
-### Selecting an Action's Arguments {#SelectingArgs}
-
-Say you have a mock function `Foo()` that takes seven arguments, and you have a
-custom action that you want to invoke when `Foo()` is called. Trouble is, the
-custom action only wants three arguments:
-
-```cpp
-using ::testing::_;
-using ::testing::Invoke;
-...
-  MOCK_METHOD(bool, Foo,
-              (bool visible, const string& name, int x, int y,
-               (const map<pair<int, int>>), double& weight, double min_weight,
-               double max_wight));
-...
-bool IsVisibleInQuadrant1(bool visible, int x, int y) {
-  return visible && x >= 0 && y >= 0;
-}
-...
-  EXPECT_CALL(mock, Foo)
-      .WillOnce(Invoke(IsVisibleInQuadrant1));  // Uh, won't compile. :-(
-```
-
-To please the compiler God, you need to define an "adaptor" that has the same
-signature as `Foo()` and calls the custom action with the right arguments:
-
-```cpp
-using ::testing::_;
-using ::testing::Invoke;
-...
-bool MyIsVisibleInQuadrant1(bool visible, const string& name, int x, int y,
-                            const map<pair<int, int>, double>& weight,
-                            double min_weight, double max_wight) {
-  return IsVisibleInQuadrant1(visible, x, y);
-}
-...
-  EXPECT_CALL(mock, Foo)
-      .WillOnce(Invoke(MyIsVisibleInQuadrant1));  // Now it works.
-```
-
-But isn't this awkward?
-
-gMock provides a generic *action adaptor*, so you can spend your time minding
-more important business than writing your own adaptors. Here's the syntax:
-
-```cpp
-WithArgs<N1, N2, ..., Nk>(action)
-```
-
-creates an action that passes the arguments of the mock function at the given
-indices (0-based) to the inner `action` and performs it. Using `WithArgs`, our
-original example can be written as:
-
-```cpp
-using ::testing::_;
-using ::testing::Invoke;
-using ::testing::WithArgs;
-...
-  EXPECT_CALL(mock, Foo)
-      .WillOnce(WithArgs<0, 2, 3>(Invoke(IsVisibleInQuadrant1)));  // No need to define your own adaptor.
-```
-
-For better readability, gMock also gives you:
-
-*   `WithoutArgs(action)` when the inner `action` takes *no* argument, and
-*   `WithArg<N>(action)` (no `s` after `Arg`) when the inner `action` takes
-    *one* argument.
-
-As you may have realized, `InvokeWithoutArgs(...)` is just syntactic sugar for
-`WithoutArgs(Invoke(...))`.
-
-Here are more tips:
-
-*   The inner action used in `WithArgs` and friends does not have to be
-    `Invoke()` -- it can be anything.
-*   You can repeat an argument in the argument list if necessary, e.g.
-    `WithArgs<2, 3, 3, 5>(...)`.
-*   You can change the order of the arguments, e.g. `WithArgs<3, 2, 1>(...)`.
-*   The types of the selected arguments do *not* have to match the signature of
-    the inner action exactly. It works as long as they can be implicitly
-    converted to the corresponding arguments of the inner action. For example,
-    if the 4-th argument of the mock function is an `int` and `my_action` takes
-    a `double`, `WithArg<4>(my_action)` will work.
-
-### Ignoring Arguments in Action Functions
-
-The [selecting-an-action's-arguments](#SelectingArgs) recipe showed us one way
-to make a mock function and an action with incompatible argument lists fit
-together. The downside is that wrapping the action in `WithArgs<...>()` can get
-tedious for people writing the tests.
-
-If you are defining a function (or method, functor, lambda, callback) to be used
-with `Invoke*()`, and you are not interested in some of its arguments, an
-alternative to `WithArgs` is to declare the uninteresting arguments as `Unused`.
-This makes the definition less cluttered and less fragile in case the types of
-the uninteresting arguments change. It could also increase the chance the action
-function can be reused. For example, given
-
-```cpp
- public:
-  MOCK_METHOD(double, Foo, double(const string& label, double x, double y),
-              (override));
-  MOCK_METHOD(double, Bar, (int index, double x, double y), (override));
-```
-
-instead of
-
-```cpp
-using ::testing::_;
-using ::testing::Invoke;
-
-double DistanceToOriginWithLabel(const string& label, double x, double y) {
-  return sqrt(x*x + y*y);
-}
-double DistanceToOriginWithIndex(int index, double x, double y) {
-  return sqrt(x*x + y*y);
-}
-...
-  EXPECT_CALL(mock, Foo("abc", _, _))
-      .WillOnce(Invoke(DistanceToOriginWithLabel));
-  EXPECT_CALL(mock, Bar(5, _, _))
-      .WillOnce(Invoke(DistanceToOriginWithIndex));
-```
-
-you could write
-
-```cpp
-using ::testing::_;
-using ::testing::Invoke;
-using ::testing::Unused;
-
-double DistanceToOrigin(Unused, double x, double y) {
-  return sqrt(x*x + y*y);
-}
-...
-  EXPECT_CALL(mock, Foo("abc", _, _))
-      .WillOnce(Invoke(DistanceToOrigin));
-  EXPECT_CALL(mock, Bar(5, _, _))
-      .WillOnce(Invoke(DistanceToOrigin));
-```
-
-### Sharing Actions
-
-Just like matchers, a gMock action object consists of a pointer to a ref-counted
-implementation object. Therefore copying actions is also allowed and very
-efficient. When the last action that references the implementation object dies,
-the implementation object will be deleted.
-
-If you have some complex action that you want to use again and again, you may
-not have to build it from scratch everytime. If the action doesn't have an
-internal state (i.e. if it always does the same thing no matter how many times
-it has been called), you can assign it to an action variable and use that
-variable repeatedly. For example:
-
-```cpp
-using ::testing::Action;
-using ::testing::DoAll;
-using ::testing::Return;
-using ::testing::SetArgPointee;
-...
-  Action<bool(int*)> set_flag = DoAll(SetArgPointee<0>(5),
-                                      Return(true));
-  ... use set_flag in .WillOnce() and .WillRepeatedly() ...
-```
-
-However, if the action has its own state, you may be surprised if you share the
-action object. Suppose you have an action factory `IncrementCounter(init)` which
-creates an action that increments and returns a counter whose initial value is
-`init`, using two actions created from the same expression and using a shared
-action will exhibit different behaviors. Example:
-
-```cpp
-  EXPECT_CALL(foo, DoThis())
-      .WillRepeatedly(IncrementCounter(0));
-  EXPECT_CALL(foo, DoThat())
-      .WillRepeatedly(IncrementCounter(0));
-  foo.DoThis();  // Returns 1.
-  foo.DoThis();  // Returns 2.
-  foo.DoThat();  // Returns 1 - Blah() uses a different
-                 // counter than Bar()'s.
-```
-
-versus
-
-```cpp
-using ::testing::Action;
-...
-  Action<int()> increment = IncrementCounter(0);
-  EXPECT_CALL(foo, DoThis())
-      .WillRepeatedly(increment);
-  EXPECT_CALL(foo, DoThat())
-      .WillRepeatedly(increment);
-  foo.DoThis();  // Returns 1.
-  foo.DoThis();  // Returns 2.
-  foo.DoThat();  // Returns 3 - the counter is shared.
-```
-
-### Testing Asynchronous Behavior
-
-One oft-encountered problem with gMock is that it can be hard to test
-asynchronous behavior. Suppose you had a `EventQueue` class that you wanted to
-test, and you created a separate `EventDispatcher` interface so that you could
-easily mock it out. However, the implementation of the class fired all the
-events on a background thread, which made test timings difficult. You could just
-insert `sleep()` statements and hope for the best, but that makes your test
-behavior nondeterministic. A better way is to use gMock actions and
-`Notification` objects to force your asynchronous test to behave synchronously.
-
-```cpp
-class MockEventDispatcher : public EventDispatcher {
-  MOCK_METHOD(bool, DispatchEvent, (int32), (override));
-};
-
-TEST(EventQueueTest, EnqueueEventTest) {
-  MockEventDispatcher mock_event_dispatcher;
-  EventQueue event_queue(&mock_event_dispatcher);
-
-  const int32 kEventId = 321;
-  absl::Notification done;
-  EXPECT_CALL(mock_event_dispatcher, DispatchEvent(kEventId))
-      .WillOnce([&done] { done.Notify(); });
-
-  event_queue.EnqueueEvent(kEventId);
-  done.WaitForNotification();
-}
-```
-
-In the example above, we set our normal gMock expectations, but then add an
-additional action to notify the `Notification` object. Now we can just call
-`Notification::WaitForNotification()` in the main thread to wait for the
-asynchronous call to finish. After that, our test suite is complete and we can
-safely exit.
-
-{: .callout .note}
-Note: this example has a downside: namely, if the expectation is not satisfied,
-our test will run forever. It will eventually time-out and fail, but it will
-take longer and be slightly harder to debug. To alleviate this problem, you can
-use `WaitForNotificationWithTimeout(ms)` instead of `WaitForNotification()`.
-
-## Misc Recipes on Using gMock
-
-### Mocking Methods That Use Move-Only Types
-
-C++11 introduced *move-only types*. A move-only-typed value can be moved from
-one object to another, but cannot be copied. `std::unique_ptr<T>` is probably
-the most commonly used move-only type.
-
-Mocking a method that takes and/or returns move-only types presents some
-challenges, but nothing insurmountable. This recipe shows you how you can do it.
-Note that the support for move-only method arguments was only introduced to
-gMock in April 2017; in older code, you may find more complex
-[workarounds](#LegacyMoveOnly) for lack of this feature.
-
-Let’s say we are working on a fictional project that lets one post and share
-snippets called “buzzes”. Your code uses these types:
-
-```cpp
-enum class AccessLevel { kInternal, kPublic };
-
-class Buzz {
- public:
-  explicit Buzz(AccessLevel access) { ... }
-  ...
-};
-
-class Buzzer {
- public:
-  virtual ~Buzzer() {}
-  virtual std::unique_ptr<Buzz> MakeBuzz(StringPiece text) = 0;
-  virtual bool ShareBuzz(std::unique_ptr<Buzz> buzz, int64_t timestamp) = 0;
-  ...
-};
-```
-
-A `Buzz` object represents a snippet being posted. A class that implements the
-`Buzzer` interface is capable of creating and sharing `Buzz`es. Methods in
-`Buzzer` may return a `unique_ptr<Buzz>` or take a `unique_ptr<Buzz>`. Now we
-need to mock `Buzzer` in our tests.
-
-To mock a method that accepts or returns move-only types, you just use the
-familiar `MOCK_METHOD` syntax as usual:
-
-```cpp
-class MockBuzzer : public Buzzer {
- public:
-  MOCK_METHOD(std::unique_ptr<Buzz>, MakeBuzz, (StringPiece text), (override));
-  MOCK_METHOD(bool, ShareBuzz, (std::unique_ptr<Buzz> buzz, int64_t timestamp),
-              (override));
-};
-```
-
-Now that we have the mock class defined, we can use it in tests. In the
-following code examples, we assume that we have defined a `MockBuzzer` object
-named `mock_buzzer_`:
-
-```cpp
-  MockBuzzer mock_buzzer_;
-```
-
-First let’s see how we can set expectations on the `MakeBuzz()` method, which
-returns a `unique_ptr<Buzz>`.
-
-As usual, if you set an expectation without an action (i.e. the `.WillOnce()` or
-`.WillRepeatedly()` clause), when that expectation fires, the default action for
-that method will be taken. Since `unique_ptr<>` has a default constructor that
-returns a null `unique_ptr`, that’s what you’ll get if you don’t specify an
-action:
-
-```cpp
-  // Use the default action.
-  EXPECT_CALL(mock_buzzer_, MakeBuzz("hello"));
-
-  // Triggers the previous EXPECT_CALL.
-  EXPECT_EQ(nullptr, mock_buzzer_.MakeBuzz("hello"));
-```
-
-If you are not happy with the default action, you can tweak it as usual; see
-[Setting Default Actions](#OnCall).
-
-If you just need to return a pre-defined move-only value, you can use the
-`Return(ByMove(...))` action:
-
-```cpp
-  // When this fires, the unique_ptr<> specified by ByMove(...) will
-  // be returned.
-  EXPECT_CALL(mock_buzzer_, MakeBuzz("world"))
-      .WillOnce(Return(ByMove(MakeUnique<Buzz>(AccessLevel::kInternal))));
-
-  EXPECT_NE(nullptr, mock_buzzer_.MakeBuzz("world"));
-```
-
-Note that `ByMove()` is essential here - if you drop it, the code won’t compile.
-
-Quiz time! What do you think will happen if a `Return(ByMove(...))` action is
-performed more than once (e.g. you write `...
-.WillRepeatedly(Return(ByMove(...)));`)? Come think of it, after the first time
-the action runs, the source value will be consumed (since it’s a move-only
-value), so the next time around, there’s no value to move from -- you’ll get a
-run-time error that `Return(ByMove(...))` can only be run once.
-
-If you need your mock method to do more than just moving a pre-defined value,
-remember that you can always use a lambda or a callable object, which can do
-pretty much anything you want:
-
-```cpp
-  EXPECT_CALL(mock_buzzer_, MakeBuzz("x"))
-      .WillRepeatedly([](StringPiece text) {
-        return MakeUnique<Buzz>(AccessLevel::kInternal);
-      });
-
-  EXPECT_NE(nullptr, mock_buzzer_.MakeBuzz("x"));
-  EXPECT_NE(nullptr, mock_buzzer_.MakeBuzz("x"));
-```
-
-Every time this `EXPECT_CALL` fires, a new `unique_ptr<Buzz>` will be created
-and returned. You cannot do this with `Return(ByMove(...))`.
-
-That covers returning move-only values; but how do we work with methods
-accepting move-only arguments? The answer is that they work normally, although
-some actions will not compile when any of method's arguments are move-only. You
-can always use `Return`, or a [lambda or functor](#FunctionsAsActions):
-
-```cpp
-  using ::testing::Unused;
-
-  EXPECT_CALL(mock_buzzer_, ShareBuzz(NotNull(), _)).WillOnce(Return(true));
-  EXPECT_TRUE(mock_buzzer_.ShareBuzz(MakeUnique<Buzz>(AccessLevel::kInternal)),
-              0);
-
-  EXPECT_CALL(mock_buzzer_, ShareBuzz(_, _)).WillOnce(
-      [](std::unique_ptr<Buzz> buzz, Unused) { return buzz != nullptr; });
-  EXPECT_FALSE(mock_buzzer_.ShareBuzz(nullptr, 0));
-```
-
-Many built-in actions (`WithArgs`, `WithoutArgs`,`DeleteArg`, `SaveArg`, ...)
-could in principle support move-only arguments, but the support for this is not
-implemented yet. If this is blocking you, please file a bug.
-
-A few actions (e.g. `DoAll`) copy their arguments internally, so they can never
-work with non-copyable objects; you'll have to use functors instead.
-
-#### Legacy workarounds for move-only types {#LegacyMoveOnly}
-
-Support for move-only function arguments was only introduced to gMock in April
-of 2017. In older code, you may encounter the following workaround for the lack
-of this feature (it is no longer necessary - we're including it just for
-reference):
-
-```cpp
-class MockBuzzer : public Buzzer {
- public:
-  MOCK_METHOD(bool, DoShareBuzz, (Buzz* buzz, Time timestamp));
-  bool ShareBuzz(std::unique_ptr<Buzz> buzz, Time timestamp) override {
-    return DoShareBuzz(buzz.get(), timestamp);
-  }
-};
-```
-
-The trick is to delegate the `ShareBuzz()` method to a mock method (let’s call
-it `DoShareBuzz()`) that does not take move-only parameters. Then, instead of
-setting expectations on `ShareBuzz()`, you set them on the `DoShareBuzz()` mock
-method:
-
-```cpp
-  MockBuzzer mock_buzzer_;
-  EXPECT_CALL(mock_buzzer_, DoShareBuzz(NotNull(), _));
-
-  // When one calls ShareBuzz() on the MockBuzzer like this, the call is
-  // forwarded to DoShareBuzz(), which is mocked.  Therefore this statement
-  // will trigger the above EXPECT_CALL.
-  mock_buzzer_.ShareBuzz(MakeUnique<Buzz>(AccessLevel::kInternal), 0);
-```
-
-### Making the Compilation Faster
-
-Believe it or not, the *vast majority* of the time spent on compiling a mock
-class is in generating its constructor and destructor, as they perform
-non-trivial tasks (e.g. verification of the expectations). What's more, mock
-methods with different signatures have different types and thus their
-constructors/destructors need to be generated by the compiler separately. As a
-result, if you mock many different types of methods, compiling your mock class
-can get really slow.
-
-If you are experiencing slow compilation, you can move the definition of your
-mock class' constructor and destructor out of the class body and into a `.cc`
-file. This way, even if you `#include` your mock class in N files, the compiler
-only needs to generate its constructor and destructor once, resulting in a much
-faster compilation.
-
-Let's illustrate the idea using an example. Here's the definition of a mock
-class before applying this recipe:
-
-```cpp
-// File mock_foo.h.
-...
-class MockFoo : public Foo {
- public:
-  // Since we don't declare the constructor or the destructor,
-  // the compiler will generate them in every translation unit
-  // where this mock class is used.
-
-  MOCK_METHOD(int, DoThis, (), (override));
-  MOCK_METHOD(bool, DoThat, (const char* str), (override));
-  ... more mock methods ...
-};
-```
-
-After the change, it would look like:
-
-```cpp
-// File mock_foo.h.
-...
-class MockFoo : public Foo {
- public:
-  // The constructor and destructor are declared, but not defined, here.
-  MockFoo();
-  virtual ~MockFoo();
-
-  MOCK_METHOD(int, DoThis, (), (override));
-  MOCK_METHOD(bool, DoThat, (const char* str), (override));
-  ... more mock methods ...
-};
-```
-
-and
-
-```cpp
-// File mock_foo.cc.
-#include "path/to/mock_foo.h"
-
-// The definitions may appear trivial, but the functions actually do a
-// lot of things through the constructors/destructors of the member
-// variables used to implement the mock methods.
-MockFoo::MockFoo() {}
-MockFoo::~MockFoo() {}
-```
-
-### Forcing a Verification
-
-When it's being destroyed, your friendly mock object will automatically verify
-that all expectations on it have been satisfied, and will generate googletest
-failures if not. This is convenient as it leaves you with one less thing to
-worry about. That is, unless you are not sure if your mock object will be
-destroyed.
-
-How could it be that your mock object won't eventually be destroyed? Well, it
-might be created on the heap and owned by the code you are testing. Suppose
-there's a bug in that code and it doesn't delete the mock object properly - you
-could end up with a passing test when there's actually a bug.
-
-Using a heap checker is a good idea and can alleviate the concern, but its
-implementation is not 100% reliable. So, sometimes you do want to *force* gMock
-to verify a mock object before it is (hopefully) destructed. You can do this
-with `Mock::VerifyAndClearExpectations(&mock_object)`:
-
-```cpp
-TEST(MyServerTest, ProcessesRequest) {
-  using ::testing::Mock;
-
-  MockFoo* const foo = new MockFoo;
-  EXPECT_CALL(*foo, ...)...;
-  // ... other expectations ...
-
-  // server now owns foo.
-  MyServer server(foo);
-  server.ProcessRequest(...);
-
-  // In case that server's destructor will forget to delete foo,
-  // this will verify the expectations anyway.
-  Mock::VerifyAndClearExpectations(foo);
-}  // server is destroyed when it goes out of scope here.
-```
-
-{: .callout .tip}
-**Tip:** The `Mock::VerifyAndClearExpectations()` function returns a `bool` to
-indicate whether the verification was successful (`true` for yes), so you can
-wrap that function call inside a `ASSERT_TRUE()` if there is no point going
-further when the verification has failed.
-
-### Using Check Points {#UsingCheckPoints}
-
-Sometimes you may want to "reset" a mock object at various check points in your
-test: at each check point, you verify that all existing expectations on the mock
-object have been satisfied, and then you set some new expectations on it as if
-it's newly created. This allows you to work with a mock object in "phases" whose
-sizes are each manageable.
-
-One such scenario is that in your test's `SetUp()` function, you may want to put
-the object you are testing into a certain state, with the help from a mock
-object. Once in the desired state, you want to clear all expectations on the
-mock, such that in the `TEST_F` body you can set fresh expectations on it.
-
-As you may have figured out, the `Mock::VerifyAndClearExpectations()` function
-we saw in the previous recipe can help you here. Or, if you are using
-`ON_CALL()` to set default actions on the mock object and want to clear the
-default actions as well, use `Mock::VerifyAndClear(&mock_object)` instead. This
-function does what `Mock::VerifyAndClearExpectations(&mock_object)` does and
-returns the same `bool`, **plus** it clears the `ON_CALL()` statements on
-`mock_object` too.
-
-Another trick you can use to achieve the same effect is to put the expectations
-in sequences and insert calls to a dummy "check-point" function at specific
-places. Then you can verify that the mock function calls do happen at the right
-time. For example, if you are exercising code:
-
-```cpp
-  Foo(1);
-  Foo(2);
-  Foo(3);
-```
-
-and want to verify that `Foo(1)` and `Foo(3)` both invoke `mock.Bar("a")`, but
-`Foo(2)` doesn't invoke anything. You can write:
-
-```cpp
-using ::testing::MockFunction;
-
-TEST(FooTest, InvokesBarCorrectly) {
-  MyMock mock;
-  // Class MockFunction<F> has exactly one mock method.  It is named
-  // Call() and has type F.
-  MockFunction<void(string check_point_name)> check;
-  {
-    InSequence s;
-
-    EXPECT_CALL(mock, Bar("a"));
-    EXPECT_CALL(check, Call("1"));
-    EXPECT_CALL(check, Call("2"));
-    EXPECT_CALL(mock, Bar("a"));
-  }
-  Foo(1);
-  check.Call("1");
-  Foo(2);
-  check.Call("2");
-  Foo(3);
-}
-```
-
-The expectation spec says that the first `Bar("a")` must happen before check
-point "1", the second `Bar("a")` must happen after check point "2", and nothing
-should happen between the two check points. The explicit check points make it
-easy to tell which `Bar("a")` is called by which call to `Foo()`.
-
-### Mocking Destructors
-
-Sometimes you want to make sure a mock object is destructed at the right time,
-e.g. after `bar->A()` is called but before `bar->B()` is called. We already know
-that you can specify constraints on the [order](#OrderedCalls) of mock function
-calls, so all we need to do is to mock the destructor of the mock function.
-
-This sounds simple, except for one problem: a destructor is a special function
-with special syntax and special semantics, and the `MOCK_METHOD` macro doesn't
-work for it:
-
-```cpp
-MOCK_METHOD(void, ~MockFoo, ());  // Won't compile!
-```
-
-The good news is that you can use a simple pattern to achieve the same effect.
-First, add a mock function `Die()` to your mock class and call it in the
-destructor, like this:
-
-```cpp
-class MockFoo : public Foo {
-  ...
-  // Add the following two lines to the mock class.
-  MOCK_METHOD(void, Die, ());
-  ~MockFoo() override { Die(); }
-};
-```
-
-(If the name `Die()` clashes with an existing symbol, choose another name.) Now,
-we have translated the problem of testing when a `MockFoo` object dies to
-testing when its `Die()` method is called:
-
-```cpp
-  MockFoo* foo = new MockFoo;
-  MockBar* bar = new MockBar;
-  ...
-  {
-    InSequence s;
-
-    // Expects *foo to die after bar->A() and before bar->B().
-    EXPECT_CALL(*bar, A());
-    EXPECT_CALL(*foo, Die());
-    EXPECT_CALL(*bar, B());
-  }
-```
-
-And that's that.
-
-### Using gMock and Threads {#UsingThreads}
-
-In a **unit** test, it's best if you could isolate and test a piece of code in a
-single-threaded context. That avoids race conditions and dead locks, and makes
-debugging your test much easier.
-
-Yet most programs are multi-threaded, and sometimes to test something we need to
-pound on it from more than one thread. gMock works for this purpose too.
-
-Remember the steps for using a mock:
-
-1.  Create a mock object `foo`.
-2.  Set its default actions and expectations using `ON_CALL()` and
-    `EXPECT_CALL()`.
-3.  The code under test calls methods of `foo`.
-4.  Optionally, verify and reset the mock.
-5.  Destroy the mock yourself, or let the code under test destroy it. The
-    destructor will automatically verify it.
-
-If you follow the following simple rules, your mocks and threads can live
-happily together:
-
-*   Execute your *test code* (as opposed to the code being tested) in *one*
-    thread. This makes your test easy to follow.
-*   Obviously, you can do step #1 without locking.
-*   When doing step #2 and #5, make sure no other thread is accessing `foo`.
-    Obvious too, huh?
-*   #3 and #4 can be done either in one thread or in multiple threads - anyway
-    you want. gMock takes care of the locking, so you don't have to do any -
-    unless required by your test logic.
-
-If you violate the rules (for example, if you set expectations on a mock while
-another thread is calling its methods), you get undefined behavior. That's not
-fun, so don't do it.
-
-gMock guarantees that the action for a mock function is done in the same thread
-that called the mock function. For example, in
-
-```cpp
-  EXPECT_CALL(mock, Foo(1))
-      .WillOnce(action1);
-  EXPECT_CALL(mock, Foo(2))
-      .WillOnce(action2);
-```
-
-if `Foo(1)` is called in thread 1 and `Foo(2)` is called in thread 2, gMock will
-execute `action1` in thread 1 and `action2` in thread 2.
-
-gMock does *not* impose a sequence on actions performed in different threads
-(doing so may create deadlocks as the actions may need to cooperate). This means
-that the execution of `action1` and `action2` in the above example *may*
-interleave. If this is a problem, you should add proper synchronization logic to
-`action1` and `action2` to make the test thread-safe.
-
-Also, remember that `DefaultValue<T>` is a global resource that potentially
-affects *all* living mock objects in your program. Naturally, you won't want to
-mess with it from multiple threads or when there still are mocks in action.
-
-### Controlling How Much Information gMock Prints
-
-When gMock sees something that has the potential of being an error (e.g. a mock
-function with no expectation is called, a.k.a. an uninteresting call, which is
-allowed but perhaps you forgot to explicitly ban the call), it prints some
-warning messages, including the arguments of the function, the return value, and
-the stack trace. Hopefully this will remind you to take a look and see if there
-is indeed a problem.
-
-Sometimes you are confident that your tests are correct and may not appreciate
-such friendly messages. Some other times, you are debugging your tests or
-learning about the behavior of the code you are testing, and wish you could
-observe every mock call that happens (including argument values, the return
-value, and the stack trace). Clearly, one size doesn't fit all.
-
-You can control how much gMock tells you using the `--gmock_verbose=LEVEL`
-command-line flag, where `LEVEL` is a string with three possible values:
-
-*   `info`: gMock will print all informational messages, warnings, and errors
-    (most verbose). At this setting, gMock will also log any calls to the
-    `ON_CALL/EXPECT_CALL` macros. It will include a stack trace in
-    "uninteresting call" warnings.
-*   `warning`: gMock will print both warnings and errors (less verbose); it will
-    omit the stack traces in "uninteresting call" warnings. This is the default.
-*   `error`: gMock will print errors only (least verbose).
-
-Alternatively, you can adjust the value of that flag from within your tests like
-so:
-
-```cpp
-  ::testing::FLAGS_gmock_verbose = "error";
-```
-
-If you find gMock printing too many stack frames with its informational or
-warning messages, remember that you can control their amount with the
-`--gtest_stack_trace_depth=max_depth` flag.
-
-Now, judiciously use the right flag to enable gMock serve you better!
-
-### Gaining Super Vision into Mock Calls
-
-You have a test using gMock. It fails: gMock tells you some expectations aren't
-satisfied. However, you aren't sure why: Is there a typo somewhere in the
-matchers? Did you mess up the order of the `EXPECT_CALL`s? Or is the code under
-test doing something wrong? How can you find out the cause?
-
-Won't it be nice if you have X-ray vision and can actually see the trace of all
-`EXPECT_CALL`s and mock method calls as they are made? For each call, would you
-like to see its actual argument values and which `EXPECT_CALL` gMock thinks it
-matches? If you still need some help to figure out who made these calls, how
-about being able to see the complete stack trace at each mock call?
-
-You can unlock this power by running your test with the `--gmock_verbose=info`
-flag. For example, given the test program:
-
-```cpp
-#include "gmock/gmock.h"
-
-using testing::_;
-using testing::HasSubstr;
-using testing::Return;
-
-class MockFoo {
- public:
-  MOCK_METHOD(void, F, (const string& x, const string& y));
-};
-
-TEST(Foo, Bar) {
-  MockFoo mock;
-  EXPECT_CALL(mock, F(_, _)).WillRepeatedly(Return());
-  EXPECT_CALL(mock, F("a", "b"));
-  EXPECT_CALL(mock, F("c", HasSubstr("d")));
-
-  mock.F("a", "good");
-  mock.F("a", "b");
-}
-```
-
-if you run it with `--gmock_verbose=info`, you will see this output:
-
-```shell
-[ RUN       ] Foo.Bar
-
-foo_test.cc:14: EXPECT_CALL(mock, F(_, _)) invoked
-Stack trace: ...
-
-foo_test.cc:15: EXPECT_CALL(mock, F("a", "b")) invoked
-Stack trace: ...
-
-foo_test.cc:16: EXPECT_CALL(mock, F("c", HasSubstr("d"))) invoked
-Stack trace: ...
-
-foo_test.cc:14: Mock function call matches EXPECT_CALL(mock, F(_, _))...
-    Function call: F(@0x7fff7c8dad40"a",@0x7fff7c8dad10"good")
-Stack trace: ...
-
-foo_test.cc:15: Mock function call matches EXPECT_CALL(mock, F("a", "b"))...
-    Function call: F(@0x7fff7c8dada0"a",@0x7fff7c8dad70"b")
-Stack trace: ...
-
-foo_test.cc:16: Failure
-Actual function call count doesn't match EXPECT_CALL(mock, F("c", HasSubstr("d")))...
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] Foo.Bar
-```
-
-Suppose the bug is that the `"c"` in the third `EXPECT_CALL` is a typo and
-should actually be `"a"`. With the above message, you should see that the actual
-`F("a", "good")` call is matched by the first `EXPECT_CALL`, not the third as
-you thought. From that it should be obvious that the third `EXPECT_CALL` is
-written wrong. Case solved.
-
-If you are interested in the mock call trace but not the stack traces, you can
-combine `--gmock_verbose=info` with `--gtest_stack_trace_depth=0` on the test
-command line.
-
-### Running Tests in Emacs
-
-If you build and run your tests in Emacs using the `M-x google-compile` command
-(as many googletest users do), the source file locations of gMock and googletest
-errors will be highlighted. Just press `<Enter>` on one of them and you'll be
-taken to the offending line. Or, you can just type `C-x`` to jump to the next
-error.
-
-To make it even easier, you can add the following lines to your `~/.emacs` file:
-
-```text
-(global-set-key "\M-m"  'google-compile)  ; m is for make
-(global-set-key [M-down] 'next-error)
-(global-set-key [M-up]  '(lambda () (interactive) (next-error -1)))
-```
-
-Then you can type `M-m` to start a build (if you want to run the test as well,
-just make sure `foo_test.run` or `runtests` is in the build command you supply
-after typing `M-m`), or `M-up`/`M-down` to move back and forth between errors.
-
-## Extending gMock
-
-### Writing New Matchers Quickly {#NewMatchers}
-
-{: .callout .warning}
-WARNING: gMock does not guarantee when or how many times a matcher will be
-invoked. Therefore, all matchers must be functionally pure. See
-[this section](#PureMatchers) for more details.
-
-The `MATCHER*` family of macros can be used to define custom matchers easily.
-The syntax:
-
-```cpp
-MATCHER(name, description_string_expression) { statements; }
-```
-
-will define a matcher with the given name that executes the statements, which
-must return a `bool` to indicate if the match succeeds. Inside the statements,
-you can refer to the value being matched by `arg`, and refer to its type by
-`arg_type`.
-
-The *description string* is a `string`-typed expression that documents what the
-matcher does, and is used to generate the failure message when the match fails.
-It can (and should) reference the special `bool` variable `negation`, and should
-evaluate to the description of the matcher when `negation` is `false`, or that
-of the matcher's negation when `negation` is `true`.
-
-For convenience, we allow the description string to be empty (`""`), in which
-case gMock will use the sequence of words in the matcher name as the
-description.
-
-For example:
-
-```cpp
-MATCHER(IsDivisibleBy7, "") { return (arg % 7) == 0; }
-```
-
-allows you to write
-
-```cpp
-  // Expects mock_foo.Bar(n) to be called where n is divisible by 7.
-  EXPECT_CALL(mock_foo, Bar(IsDivisibleBy7()));
-```
-
-or,
-
-```cpp
-  using ::testing::Not;
-  ...
-  // Verifies that two values are divisible by 7.
-  EXPECT_THAT(some_expression, IsDivisibleBy7());
-  EXPECT_THAT(some_other_expression, Not(IsDivisibleBy7()));
-```
-
-If the above assertions fail, they will print something like:
-
-```shell
-  Value of: some_expression
-  Expected: is divisible by 7
-    Actual: 27
-  ...
-  Value of: some_other_expression
-  Expected: not (is divisible by 7)
-    Actual: 21
-```
-
-where the descriptions `"is divisible by 7"` and `"not (is divisible by 7)"` are
-automatically calculated from the matcher name `IsDivisibleBy7`.
-
-As you may have noticed, the auto-generated descriptions (especially those for
-the negation) may not be so great. You can always override them with a `string`
-expression of your own:
-
-```cpp
-MATCHER(IsDivisibleBy7,
-        absl::StrCat(negation ? "isn't" : "is", " divisible by 7")) {
-  return (arg % 7) == 0;
-}
-```
-
-Optionally, you can stream additional information to a hidden argument named
-`result_listener` to explain the match result. For example, a better definition
-of `IsDivisibleBy7` is:
-
-```cpp
-MATCHER(IsDivisibleBy7, "") {
-  if ((arg % 7) == 0)
-    return true;
-
-  *result_listener << "the remainder is " << (arg % 7);
-  return false;
-}
-```
-
-With this definition, the above assertion will give a better message:
-
-```shell
-  Value of: some_expression
-  Expected: is divisible by 7
-    Actual: 27 (the remainder is 6)
-```
-
-You should let `MatchAndExplain()` print *any additional information* that can
-help a user understand the match result. Note that it should explain why the
-match succeeds in case of a success (unless it's obvious) - this is useful when
-the matcher is used inside `Not()`. There is no need to print the argument value
-itself, as gMock already prints it for you.
-
-{: .callout .note}
-NOTE: The type of the value being matched (`arg_type`) is determined by the
-context in which you use the matcher and is supplied to you by the compiler, so
-you don't need to worry about declaring it (nor can you). This allows the
-matcher to be polymorphic. For example, `IsDivisibleBy7()` can be used to match
-any type where the value of `(arg % 7) == 0` can be implicitly converted to a
-`bool`. In the `Bar(IsDivisibleBy7())` example above, if method `Bar()` takes an
-`int`, `arg_type` will be `int`; if it takes an `unsigned long`, `arg_type` will
-be `unsigned long`; and so on.
-
-### Writing New Parameterized Matchers Quickly
-
-Sometimes you'll want to define a matcher that has parameters. For that you can
-use the macro:
-
-```cpp
-MATCHER_P(name, param_name, description_string) { statements; }
-```
-
-where the description string can be either `""` or a `string` expression that
-references `negation` and `param_name`.
-
-For example:
-
-```cpp
-MATCHER_P(HasAbsoluteValue, value, "") { return abs(arg) == value; }
-```
-
-will allow you to write:
-
-```cpp
-  EXPECT_THAT(Blah("a"), HasAbsoluteValue(n));
-```
-
-which may lead to this message (assuming `n` is 10):
-
-```shell
-  Value of: Blah("a")
-  Expected: has absolute value 10
-    Actual: -9
-```
-
-Note that both the matcher description and its parameter are printed, making the
-message human-friendly.
-
-In the matcher definition body, you can write `foo_type` to reference the type
-of a parameter named `foo`. For example, in the body of
-`MATCHER_P(HasAbsoluteValue, value)` above, you can write `value_type` to refer
-to the type of `value`.
-
-gMock also provides `MATCHER_P2`, `MATCHER_P3`, ..., up to `MATCHER_P10` to
-support multi-parameter matchers:
-
-```cpp
-MATCHER_Pk(name, param_1, ..., param_k, description_string) { statements; }
-```
-
-Please note that the custom description string is for a particular *instance* of
-the matcher, where the parameters have been bound to actual values. Therefore
-usually you'll want the parameter values to be part of the description. gMock
-lets you do that by referencing the matcher parameters in the description string
-expression.
-
-For example,
-
-```cpp
-using ::testing::PrintToString;
-MATCHER_P2(InClosedRange, low, hi,
-           absl::StrFormat("%s in range [%s, %s]", negation ? "isn't" : "is",
-                           PrintToString(low), PrintToString(hi))) {
-  return low <= arg && arg <= hi;
-}
-...
-EXPECT_THAT(3, InClosedRange(4, 6));
-```
-
-would generate a failure that contains the message:
-
-```shell
-  Expected: is in range [4, 6]
-```
-
-If you specify `""` as the description, the failure message will contain the
-sequence of words in the matcher name followed by the parameter values printed
-as a tuple. For example,
-
-```cpp
-  MATCHER_P2(InClosedRange, low, hi, "") { ... }
-  ...
-  EXPECT_THAT(3, InClosedRange(4, 6));
-```
-
-would generate a failure that contains the text:
-
-```shell
-  Expected: in closed range (4, 6)
-```
-
-For the purpose of typing, you can view
-
-```cpp
-MATCHER_Pk(Foo, p1, ..., pk, description_string) { ... }
-```
-
-as shorthand for
-
-```cpp
-template <typename p1_type, ..., typename pk_type>
-FooMatcherPk<p1_type, ..., pk_type>
-Foo(p1_type p1, ..., pk_type pk) { ... }
-```
-
-When you write `Foo(v1, ..., vk)`, the compiler infers the types of the
-parameters `v1`, ..., and `vk` for you. If you are not happy with the result of
-the type inference, you can specify the types by explicitly instantiating the
-template, as in `Foo<long, bool>(5, false)`. As said earlier, you don't get to
-(or need to) specify `arg_type` as that's determined by the context in which the
-matcher is used.
-
-You can assign the result of expression `Foo(p1, ..., pk)` to a variable of type
-`FooMatcherPk<p1_type, ..., pk_type>`. This can be useful when composing
-matchers. Matchers that don't have a parameter or have only one parameter have
-special types: you can assign `Foo()` to a `FooMatcher`-typed variable, and
-assign `Foo(p)` to a `FooMatcherP<p_type>`-typed variable.
-
-While you can instantiate a matcher template with reference types, passing the
-parameters by pointer usually makes your code more readable. If, however, you
-still want to pass a parameter by reference, be aware that in the failure
-message generated by the matcher you will see the value of the referenced object
-but not its address.
-
-You can overload matchers with different numbers of parameters:
-
-```cpp
-MATCHER_P(Blah, a, description_string_1) { ... }
-MATCHER_P2(Blah, a, b, description_string_2) { ... }
-```
-
-While it's tempting to always use the `MATCHER*` macros when defining a new
-matcher, you should also consider implementing the matcher interface directly
-instead (see the recipes that follow), especially if you need to use the matcher
-a lot. While these approaches require more work, they give you more control on
-the types of the value being matched and the matcher parameters, which in
-general leads to better compiler error messages that pay off in the long run.
-They also allow overloading matchers based on parameter types (as opposed to
-just based on the number of parameters).
-
-### Writing New Monomorphic Matchers
-
-A matcher of argument type `T` implements the matcher interface for `T` and does
-two things: it tests whether a value of type `T` matches the matcher, and can
-describe what kind of values it matches. The latter ability is used for
-generating readable error messages when expectations are violated.
-
-A matcher of `T` must declare a typedef like:
-
-```cpp
-using is_gtest_matcher = void;
-```
-
-and supports the following operations:
-
-```cpp
-// Match a value and optionally explain into an ostream.
-bool matched = matcher.MatchAndExplain(value, maybe_os);
-// where `value` is of type `T` and
-// `maybe_os` is of type `std::ostream*`, where it can be null if the caller
-// is not interested in there textual explanation.
-
-matcher.DescribeTo(os);
-matcher.DescribeNegationTo(os);
-// where `os` is of type `std::ostream*`.
-```
-
-If you need a custom matcher but `Truly()` is not a good option (for example,
-you may not be happy with the way `Truly(predicate)` describes itself, or you
-may want your matcher to be polymorphic as `Eq(value)` is), you can define a
-matcher to do whatever you want in two steps: first implement the matcher
-interface, and then define a factory function to create a matcher instance. The
-second step is not strictly needed but it makes the syntax of using the matcher
-nicer.
-
-For example, you can define a matcher to test whether an `int` is divisible by 7
-and then use it like this:
-
-```cpp
-using ::testing::Matcher;
-
-class DivisibleBy7Matcher {
- public:
-  using is_gtest_matcher = void;
-
-  bool MatchAndExplain(int n, std::ostream*) const {
-    return (n % 7) == 0;
-  }
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "is divisible by 7";
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "is not divisible by 7";
-  }
-};
-
-Matcher<int> DivisibleBy7() {
-  return DivisibleBy7Matcher();
-}
-
-...
-  EXPECT_CALL(foo, Bar(DivisibleBy7()));
-```
-
-You may improve the matcher message by streaming additional information to the
-`os` argument in `MatchAndExplain()`:
-
-```cpp
-class DivisibleBy7Matcher {
- public:
-  bool MatchAndExplain(int n, std::ostream* os) const {
-    const int remainder = n % 7;
-    if (remainder != 0 && os != nullptr) {
-      *os << "the remainder is " << remainder;
-    }
-    return remainder == 0;
-  }
-  ...
-};
-```
-
-Then, `EXPECT_THAT(x, DivisibleBy7());` may generate a message like this:
-
-```shell
-Value of: x
-Expected: is divisible by 7
-  Actual: 23 (the remainder is 2)
-```
-
-{: .callout .tip}
-Tip: for convenience, `MatchAndExplain()` can take a `MatchResultListener*`
-instead of `std::ostream*`.
-
-### Writing New Polymorphic Matchers
-
-Expanding what we learned above to *polymorphic* matchers is now just as simple
-as adding templates in the right place.
-
-```cpp
-
-class NotNullMatcher {
- public:
-  using is_gtest_matcher = void;
-
-  // To implement a polymorphic matcher, we just need to make MatchAndExplain a
-  // template on its first argument.
-
-  // In this example, we want to use NotNull() with any pointer, so
-  // MatchAndExplain() accepts a pointer of any type as its first argument.
-  // In general, you can define MatchAndExplain() as an ordinary method or
-  // a method template, or even overload it.
-  template <typename T>
-  bool MatchAndExplain(T* p, std::ostream*) const {
-    return p != nullptr;
-  }
-
-  // Describes the property of a value matching this matcher.
-  void DescribeTo(std::ostream* os) const { *os << "is not NULL"; }
-
-  // Describes the property of a value NOT matching this matcher.
-  void DescribeNegationTo(std::ostream* os) const { *os << "is NULL"; }
-};
-
-NotNullMatcher NotNull() {
-  return NotNullMatcher();
-}
-
-...
-
-  EXPECT_CALL(foo, Bar(NotNull()));  // The argument must be a non-NULL pointer.
-```
-
-### Legacy Matcher Implementation
-
-Defining matchers used to be somewhat more complicated, in which it required
-several supporting classes and virtual functions. To implement a matcher for
-type `T` using the legacy API you have to derive from `MatcherInterface<T>` and
-call `MakeMatcher` to construct the object.
-
-The interface looks like this:
-
-```cpp
-class MatchResultListener {
- public:
-  ...
-  // Streams x to the underlying ostream; does nothing if the ostream
-  // is NULL.
-  template <typename T>
-  MatchResultListener& operator<<(const T& x);
-
-  // Returns the underlying ostream.
-  std::ostream* stream();
-};
-
-template <typename T>
-class MatcherInterface {
- public:
-  virtual ~MatcherInterface();
-
-  // Returns true if and only if the matcher matches x; also explains the match
-  // result to 'listener'.
-  virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
-
-  // Describes this matcher to an ostream.
-  virtual void DescribeTo(std::ostream* os) const = 0;
-
-  // Describes the negation of this matcher to an ostream.
-  virtual void DescribeNegationTo(std::ostream* os) const;
-};
-```
-
-Fortunately, most of the time you can define a polymorphic matcher easily with
-the help of `MakePolymorphicMatcher()`. Here's how you can define `NotNull()` as
-an example:
-
-```cpp
-using ::testing::MakePolymorphicMatcher;
-using ::testing::MatchResultListener;
-using ::testing::PolymorphicMatcher;
-
-class NotNullMatcher {
- public:
-  // To implement a polymorphic matcher, first define a COPYABLE class
-  // that has three members MatchAndExplain(), DescribeTo(), and
-  // DescribeNegationTo(), like the following.
-
-  // In this example, we want to use NotNull() with any pointer, so
-  // MatchAndExplain() accepts a pointer of any type as its first argument.
-  // In general, you can define MatchAndExplain() as an ordinary method or
-  // a method template, or even overload it.
-  template <typename T>
-  bool MatchAndExplain(T* p,
-                       MatchResultListener* /* listener */) const {
-    return p != NULL;
-  }
-
-  // Describes the property of a value matching this matcher.
-  void DescribeTo(std::ostream* os) const { *os << "is not NULL"; }
-
-  // Describes the property of a value NOT matching this matcher.
-  void DescribeNegationTo(std::ostream* os) const { *os << "is NULL"; }
-};
-
-// To construct a polymorphic matcher, pass an instance of the class
-// to MakePolymorphicMatcher().  Note the return type.
-PolymorphicMatcher<NotNullMatcher> NotNull() {
-  return MakePolymorphicMatcher(NotNullMatcher());
-}
-
-...
-
-  EXPECT_CALL(foo, Bar(NotNull()));  // The argument must be a non-NULL pointer.
-```
-
-{: .callout .note}
-**Note:** Your polymorphic matcher class does **not** need to inherit from
-`MatcherInterface` or any other class, and its methods do **not** need to be
-virtual.
-
-Like in a monomorphic matcher, you may explain the match result by streaming
-additional information to the `listener` argument in `MatchAndExplain()`.
-
-### Writing New Cardinalities
-
-A cardinality is used in `Times()` to tell gMock how many times you expect a
-call to occur. It doesn't have to be exact. For example, you can say
-`AtLeast(5)` or `Between(2, 4)`.
-
-If the [built-in set](gmock_cheat_sheet.md#CardinalityList) of cardinalities
-doesn't suit you, you are free to define your own by implementing the following
-interface (in namespace `testing`):
-
-```cpp
-class CardinalityInterface {
- public:
-  virtual ~CardinalityInterface();
-
-  // Returns true if and only if call_count calls will satisfy this cardinality.
-  virtual bool IsSatisfiedByCallCount(int call_count) const = 0;
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  virtual bool IsSaturatedByCallCount(int call_count) const = 0;
-
-  // Describes self to an ostream.
-  virtual void DescribeTo(std::ostream* os) const = 0;
-};
-```
-
-For example, to specify that a call must occur even number of times, you can
-write
-
-```cpp
-using ::testing::Cardinality;
-using ::testing::CardinalityInterface;
-using ::testing::MakeCardinality;
-
-class EvenNumberCardinality : public CardinalityInterface {
- public:
-  bool IsSatisfiedByCallCount(int call_count) const override {
-    return (call_count % 2) == 0;
-  }
-
-  bool IsSaturatedByCallCount(int call_count) const override {
-    return false;
-  }
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "called even number of times";
-  }
-};
-
-Cardinality EvenNumber() {
-  return MakeCardinality(new EvenNumberCardinality);
-}
-
-...
-  EXPECT_CALL(foo, Bar(3))
-      .Times(EvenNumber());
-```
-
-### Writing New Actions Quickly {#QuickNewActions}
-
-If the built-in actions don't work for you, you can easily define your own one.
-Just define a functor class with a (possibly templated) call operator, matching
-the signature of your action.
-
-```cpp
-struct Increment {
-  template <typename T>
-  T operator()(T* arg) {
-    return ++(*arg);
-  }
-}
-```
-
-The same approach works with stateful functors (or any callable, really):
-
-```
-struct MultiplyBy {
-  template <typename T>
-  T operator()(T arg) { return arg * multiplier; }
-
-  int multiplier;
-}
-
-// Then use:
-// EXPECT_CALL(...).WillOnce(MultiplyBy{7});
-```
-
-#### Legacy macro-based Actions
-
-Before C++11, the functor-based actions were not supported; the old way of
-writing actions was through a set of `ACTION*` macros. We suggest to avoid them
-in new code; they hide a lot of logic behind the macro, potentially leading to
-harder-to-understand compiler errors. Nevertheless, we cover them here for
-completeness.
-
-By writing
-
-```cpp
-ACTION(name) { statements; }
-```
-
-in a namespace scope (i.e. not inside a class or function), you will define an
-action with the given name that executes the statements. The value returned by
-`statements` will be used as the return value of the action. Inside the
-statements, you can refer to the K-th (0-based) argument of the mock function as
-`argK`. For example:
-
-```cpp
-ACTION(IncrementArg1) { return ++(*arg1); }
-```
-
-allows you to write
-
-```cpp
-... WillOnce(IncrementArg1());
-```
-
-Note that you don't need to specify the types of the mock function arguments.
-Rest assured that your code is type-safe though: you'll get a compiler error if
-`*arg1` doesn't support the `++` operator, or if the type of `++(*arg1)` isn't
-compatible with the mock function's return type.
-
-Another example:
-
-```cpp
-ACTION(Foo) {
-  (*arg2)(5);
-  Blah();
-  *arg1 = 0;
-  return arg0;
-}
-```
-
-defines an action `Foo()` that invokes argument #2 (a function pointer) with 5,
-calls function `Blah()`, sets the value pointed to by argument #1 to 0, and
-returns argument #0.
-
-For more convenience and flexibility, you can also use the following pre-defined
-symbols in the body of `ACTION`:
-
-`argK_type`     | The type of the K-th (0-based) argument of the mock function
-:-------------- | :-----------------------------------------------------------
-`args`          | All arguments of the mock function as a tuple
-`args_type`     | The type of all arguments of the mock function as a tuple
-`return_type`   | The return type of the mock function
-`function_type` | The type of the mock function
-
-For example, when using an `ACTION` as a stub action for mock function:
-
-```cpp
-int DoSomething(bool flag, int* ptr);
-```
-
-we have:
-
-Pre-defined Symbol | Is Bound To
------------------- | ---------------------------------
-`arg0`             | the value of `flag`
-`arg0_type`        | the type `bool`
-`arg1`             | the value of `ptr`
-`arg1_type`        | the type `int*`
-`args`             | the tuple `(flag, ptr)`
-`args_type`        | the type `std::tuple<bool, int*>`
-`return_type`      | the type `int`
-`function_type`    | the type `int(bool, int*)`
-
-#### Legacy macro-based parameterized Actions
-
-Sometimes you'll want to parameterize an action you define. For that we have
-another macro
-
-```cpp
-ACTION_P(name, param) { statements; }
-```
-
-For example,
-
-```cpp
-ACTION_P(Add, n) { return arg0 + n; }
-```
-
-will allow you to write
-
-```cpp
-// Returns argument #0 + 5.
-... WillOnce(Add(5));
-```
-
-For convenience, we use the term *arguments* for the values used to invoke the
-mock function, and the term *parameters* for the values used to instantiate an
-action.
-
-Note that you don't need to provide the type of the parameter either. Suppose
-the parameter is named `param`, you can also use the gMock-defined symbol
-`param_type` to refer to the type of the parameter as inferred by the compiler.
-For example, in the body of `ACTION_P(Add, n)` above, you can write `n_type` for
-the type of `n`.
-
-gMock also provides `ACTION_P2`, `ACTION_P3`, and etc to support multi-parameter
-actions. For example,
-
-```cpp
-ACTION_P2(ReturnDistanceTo, x, y) {
-  double dx = arg0 - x;
-  double dy = arg1 - y;
-  return sqrt(dx*dx + dy*dy);
-}
-```
-
-lets you write
-
-```cpp
-... WillOnce(ReturnDistanceTo(5.0, 26.5));
-```
-
-You can view `ACTION` as a degenerated parameterized action where the number of
-parameters is 0.
-
-You can also easily define actions overloaded on the number of parameters:
-
-```cpp
-ACTION_P(Plus, a) { ... }
-ACTION_P2(Plus, a, b) { ... }
-```
-
-### Restricting the Type of an Argument or Parameter in an ACTION
-
-For maximum brevity and reusability, the `ACTION*` macros don't ask you to
-provide the types of the mock function arguments and the action parameters.
-Instead, we let the compiler infer the types for us.
-
-Sometimes, however, we may want to be more explicit about the types. There are
-several tricks to do that. For example:
-
-```cpp
-ACTION(Foo) {
-  // Makes sure arg0 can be converted to int.
-  int n = arg0;
-  ... use n instead of arg0 here ...
-}
-
-ACTION_P(Bar, param) {
-  // Makes sure the type of arg1 is const char*.
-  ::testing::StaticAssertTypeEq<const char*, arg1_type>();
-
-  // Makes sure param can be converted to bool.
-  bool flag = param;
-}
-```
-
-where `StaticAssertTypeEq` is a compile-time assertion in googletest that
-verifies two types are the same.
-
-### Writing New Action Templates Quickly
-
-Sometimes you want to give an action explicit template parameters that cannot be
-inferred from its value parameters. `ACTION_TEMPLATE()` supports that and can be
-viewed as an extension to `ACTION()` and `ACTION_P*()`.
-
-The syntax:
-
-```cpp
-ACTION_TEMPLATE(ActionName,
-                HAS_m_TEMPLATE_PARAMS(kind1, name1, ..., kind_m, name_m),
-                AND_n_VALUE_PARAMS(p1, ..., p_n)) { statements; }
-```
-
-defines an action template that takes *m* explicit template parameters and *n*
-value parameters, where *m* is in [1, 10] and *n* is in [0, 10]. `name_i` is the
-name of the *i*-th template parameter, and `kind_i` specifies whether it's a
-`typename`, an integral constant, or a template. `p_i` is the name of the *i*-th
-value parameter.
-
-Example:
-
-```cpp
-// DuplicateArg<k, T>(output) converts the k-th argument of the mock
-// function to type T and copies it to *output.
-ACTION_TEMPLATE(DuplicateArg,
-                // Note the comma between int and k:
-                HAS_2_TEMPLATE_PARAMS(int, k, typename, T),
-                AND_1_VALUE_PARAMS(output)) {
-  *output = T(std::get<k>(args));
-}
-```
-
-To create an instance of an action template, write:
-
-```cpp
-ActionName<t1, ..., t_m>(v1, ..., v_n)
-```
-
-where the `t`s are the template arguments and the `v`s are the value arguments.
-The value argument types are inferred by the compiler. For example:
-
-```cpp
-using ::testing::_;
-...
-  int n;
-  EXPECT_CALL(mock, Foo).WillOnce(DuplicateArg<1, unsigned char>(&n));
-```
-
-If you want to explicitly specify the value argument types, you can provide
-additional template arguments:
-
-```cpp
-ActionName<t1, ..., t_m, u1, ..., u_k>(v1, ..., v_n)
-```
-
-where `u_i` is the desired type of `v_i`.
-
-`ACTION_TEMPLATE` and `ACTION`/`ACTION_P*` can be overloaded on the number of
-value parameters, but not on the number of template parameters. Without the
-restriction, the meaning of the following is unclear:
-
-```cpp
-  OverloadedAction<int, bool>(x);
-```
-
-Are we using a single-template-parameter action where `bool` refers to the type
-of `x`, or a two-template-parameter action where the compiler is asked to infer
-the type of `x`?
-
-### Using the ACTION Object's Type
-
-If you are writing a function that returns an `ACTION` object, you'll need to
-know its type. The type depends on the macro used to define the action and the
-parameter types. The rule is relatively simple:
-
-
-| Given Definition              | Expression          | Has Type              |
-| ----------------------------- | ------------------- | --------------------- |
-| `ACTION(Foo)`                 | `Foo()`             | `FooAction`           |
-| `ACTION_TEMPLATE(Foo, HAS_m_TEMPLATE_PARAMS(...), AND_0_VALUE_PARAMS())` | `Foo<t1, ..., t_m>()` | `FooAction<t1, ..., t_m>` |
-| `ACTION_P(Bar, param)`        | `Bar(int_value)`    | `BarActionP<int>`     |
-| `ACTION_TEMPLATE(Bar, HAS_m_TEMPLATE_PARAMS(...), AND_1_VALUE_PARAMS(p1))` | `Bar<t1, ..., t_m>(int_value)` | `BarActionP<t1, ..., t_m, int>` |
-| `ACTION_P2(Baz, p1, p2)`      | `Baz(bool_value, int_value)` | `BazActionP2<bool, int>` |
-| `ACTION_TEMPLATE(Baz, HAS_m_TEMPLATE_PARAMS(...), AND_2_VALUE_PARAMS(p1, p2))` | `Baz<t1, ..., t_m>(bool_value, int_value)` | `BazActionP2<t1, ..., t_m, bool, int>` |
-| ...                           | ...                 | ...                   |
-
-
-Note that we have to pick different suffixes (`Action`, `ActionP`, `ActionP2`,
-and etc) for actions with different numbers of value parameters, or the action
-definitions cannot be overloaded on the number of them.
-
-### Writing New Monomorphic Actions {#NewMonoActions}
-
-While the `ACTION*` macros are very convenient, sometimes they are
-inappropriate. For example, despite the tricks shown in the previous recipes,
-they don't let you directly specify the types of the mock function arguments and
-the action parameters, which in general leads to unoptimized compiler error
-messages that can baffle unfamiliar users. They also don't allow overloading
-actions based on parameter types without jumping through some hoops.
-
-An alternative to the `ACTION*` macros is to implement
-`::testing::ActionInterface<F>`, where `F` is the type of the mock function in
-which the action will be used. For example:
-
-```cpp
-template <typename F>
-class ActionInterface {
- public:
-  virtual ~ActionInterface();
-
-  // Performs the action.  Result is the return type of function type
-  // F, and ArgumentTuple is the tuple of arguments of F.
-  //
-
-  // For example, if F is int(bool, const string&), then Result would
-  // be int, and ArgumentTuple would be std::tuple<bool, const string&>.
-  virtual Result Perform(const ArgumentTuple& args) = 0;
-};
-```
-
-```cpp
-using ::testing::_;
-using ::testing::Action;
-using ::testing::ActionInterface;
-using ::testing::MakeAction;
-
-typedef int IncrementMethod(int*);
-
-class IncrementArgumentAction : public ActionInterface<IncrementMethod> {
- public:
-  int Perform(const std::tuple<int*>& args) override {
-    int* p = std::get<0>(args);  // Grabs the first argument.
-    return *p++;
-  }
-};
-
-Action<IncrementMethod> IncrementArgument() {
-  return MakeAction(new IncrementArgumentAction);
-}
-
-...
-  EXPECT_CALL(foo, Baz(_))
-      .WillOnce(IncrementArgument());
-
-  int n = 5;
-  foo.Baz(&n);  // Should return 5 and change n to 6.
-```
-
-### Writing New Polymorphic Actions {#NewPolyActions}
-
-The previous recipe showed you how to define your own action. This is all good,
-except that you need to know the type of the function in which the action will
-be used. Sometimes that can be a problem. For example, if you want to use the
-action in functions with *different* types (e.g. like `Return()` and
-`SetArgPointee()`).
-
-If an action can be used in several types of mock functions, we say it's
-*polymorphic*. The `MakePolymorphicAction()` function template makes it easy to
-define such an action:
-
-```cpp
-namespace testing {
-template <typename Impl>
-PolymorphicAction<Impl> MakePolymorphicAction(const Impl& impl);
-}  // namespace testing
-```
-
-As an example, let's define an action that returns the second argument in the
-mock function's argument list. The first step is to define an implementation
-class:
-
-```cpp
-class ReturnSecondArgumentAction {
- public:
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& args) const {
-    // To get the i-th (0-based) argument, use std::get(args).
-    return std::get<1>(args);
-  }
-};
-```
-
-This implementation class does *not* need to inherit from any particular class.
-What matters is that it must have a `Perform()` method template. This method
-template takes the mock function's arguments as a tuple in a **single**
-argument, and returns the result of the action. It can be either `const` or not,
-but must be invokable with exactly one template argument, which is the result
-type. In other words, you must be able to call `Perform<R>(args)` where `R` is
-the mock function's return type and `args` is its arguments in a tuple.
-
-Next, we use `MakePolymorphicAction()` to turn an instance of the implementation
-class into the polymorphic action we need. It will be convenient to have a
-wrapper for this:
-
-```cpp
-using ::testing::MakePolymorphicAction;
-using ::testing::PolymorphicAction;
-
-PolymorphicAction<ReturnSecondArgumentAction> ReturnSecondArgument() {
-  return MakePolymorphicAction(ReturnSecondArgumentAction());
-}
-```
-
-Now, you can use this polymorphic action the same way you use the built-in ones:
-
-```cpp
-using ::testing::_;
-
-class MockFoo : public Foo {
- public:
-  MOCK_METHOD(int, DoThis, (bool flag, int n), (override));
-  MOCK_METHOD(string, DoThat, (int x, const char* str1, const char* str2),
-              (override));
-};
-
-  ...
-  MockFoo foo;
-  EXPECT_CALL(foo, DoThis).WillOnce(ReturnSecondArgument());
-  EXPECT_CALL(foo, DoThat).WillOnce(ReturnSecondArgument());
-  ...
-  foo.DoThis(true, 5);  // Will return 5.
-  foo.DoThat(1, "Hi", "Bye");  // Will return "Hi".
-```
-
-### Teaching gMock How to Print Your Values
-
-When an uninteresting or unexpected call occurs, gMock prints the argument
-values and the stack trace to help you debug. Assertion macros like
-`EXPECT_THAT` and `EXPECT_EQ` also print the values in question when the
-assertion fails. gMock and googletest do this using googletest's user-extensible
-value printer.
-
-This printer knows how to print built-in C++ types, native arrays, STL
-containers, and any type that supports the `<<` operator. For other types, it
-prints the raw bytes in the value and hopes that you the user can figure it out.
-[The GoogleTest advanced guide](advanced.md#teaching-googletest-how-to-print-your-values)
-explains how to extend the printer to do a better job at printing your
-particular type than to dump the bytes.
-
-## Useful Mocks Created Using gMock
-
-<!--#include file="includes/g3_testing_LOGs.md"-->
-<!--#include file="includes/g3_mock_callbacks.md"-->
-
-### Mock std::function {#MockFunction}
-
-`std::function` is a general function type introduced in C++11. It is a
-preferred way of passing callbacks to new interfaces. Functions are copiable,
-and are not usually passed around by pointer, which makes them tricky to mock.
-But fear not - `MockFunction` can help you with that.
-
-`MockFunction<R(T1, ..., Tn)>` has a mock method `Call()` with the signature:
-
-```cpp
-  R Call(T1, ..., Tn);
-```
-
-It also has a `AsStdFunction()` method, which creates a `std::function` proxy
-forwarding to Call:
-
-```cpp
-  std::function<R(T1, ..., Tn)> AsStdFunction();
-```
-
-To use `MockFunction`, first create `MockFunction` object and set up
-expectations on its `Call` method. Then pass proxy obtained from
-`AsStdFunction()` to the code you are testing. For example:
-
-```cpp
-TEST(FooTest, RunsCallbackWithBarArgument) {
-  // 1. Create a mock object.
-  MockFunction<int(string)> mock_function;
-
-  // 2. Set expectations on Call() method.
-  EXPECT_CALL(mock_function, Call("bar")).WillOnce(Return(1));
-
-  // 3. Exercise code that uses std::function.
-  Foo(mock_function.AsStdFunction());
-  // Foo's signature can be either of:
-  // void Foo(const std::function<int(string)>& fun);
-  // void Foo(std::function<int(string)> fun);
-
-  // 4. All expectations will be verified when mock_function
-  //     goes out of scope and is destroyed.
-}
-```
-
-Remember that function objects created with `AsStdFunction()` are just
-forwarders. If you create multiple of them, they will share the same set of
-expectations.
-
-Although `std::function` supports unlimited number of arguments, `MockFunction`
-implementation is limited to ten. If you ever hit that limit... well, your
-callback has bigger problems than being mockable. :-)
diff --git a/third_party/googletest/docs/gmock_faq.md b/third_party/googletest/docs/gmock_faq.md
deleted file mode 100644
index 09623b4..0000000
--- a/third_party/googletest/docs/gmock_faq.md
+++ /dev/null
@@ -1,390 +0,0 @@
-# Legacy gMock FAQ
-
-### When I call a method on my mock object, the method for the real object is invoked instead. What's the problem?
-
-In order for a method to be mocked, it must be *virtual*, unless you use the
-[high-perf dependency injection technique](gmock_cook_book.md#MockingNonVirtualMethods).
-
-### Can I mock a variadic function?
-
-You cannot mock a variadic function (i.e. a function taking ellipsis (`...`)
-arguments) directly in gMock.
-
-The problem is that in general, there is *no way* for a mock object to know how
-many arguments are passed to the variadic method, and what the arguments' types
-are. Only the *author of the base class* knows the protocol, and we cannot look
-into his or her head.
-
-Therefore, to mock such a function, the *user* must teach the mock object how to
-figure out the number of arguments and their types. One way to do it is to
-provide overloaded versions of the function.
-
-Ellipsis arguments are inherited from C and not really a C++ feature. They are
-unsafe to use and don't work with arguments that have constructors or
-destructors. Therefore we recommend to avoid them in C++ as much as possible.
-
-### MSVC gives me warning C4301 or C4373 when I define a mock method with a const parameter. Why?
-
-If you compile this using Microsoft Visual C++ 2005 SP1:
-
-```cpp
-class Foo {
-  ...
-  virtual void Bar(const int i) = 0;
-};
-
-class MockFoo : public Foo {
-  ...
-  MOCK_METHOD(void, Bar, (const int i), (override));
-};
-```
-
-You may get the following warning:
-
-```shell
-warning C4301: 'MockFoo::Bar': overriding virtual function only differs from 'Foo::Bar' by const/volatile qualifier
-```
-
-This is a MSVC bug. The same code compiles fine with gcc, for example. If you
-use Visual C++ 2008 SP1, you would get the warning:
-
-```shell
-warning C4373: 'MockFoo::Bar': virtual function overrides 'Foo::Bar', previous versions of the compiler did not override when parameters only differed by const/volatile qualifiers
-```
-
-In C++, if you *declare* a function with a `const` parameter, the `const`
-modifier is ignored. Therefore, the `Foo` base class above is equivalent to:
-
-```cpp
-class Foo {
-  ...
-  virtual void Bar(int i) = 0;  // int or const int?  Makes no difference.
-};
-```
-
-In fact, you can *declare* `Bar()` with an `int` parameter, and define it with a
-`const int` parameter. The compiler will still match them up.
-
-Since making a parameter `const` is meaningless in the method declaration, we
-recommend to remove it in both `Foo` and `MockFoo`. That should workaround the
-VC bug.
-
-Note that we are talking about the *top-level* `const` modifier here. If the
-function parameter is passed by pointer or reference, declaring the pointee or
-referee as `const` is still meaningful. For example, the following two
-declarations are *not* equivalent:
-
-```cpp
-void Bar(int* p);         // Neither p nor *p is const.
-void Bar(const int* p);  // p is not const, but *p is.
-```
-
-### I can't figure out why gMock thinks my expectations are not satisfied. What should I do?
-
-You might want to run your test with `--gmock_verbose=info`. This flag lets
-gMock print a trace of every mock function call it receives. By studying the
-trace, you'll gain insights on why the expectations you set are not met.
-
-If you see the message "The mock function has no default action set, and its
-return type has no default value set.", then try
-[adding a default action](gmock_for_dummies.md#DefaultValue). Due to a known
-issue, unexpected calls on mocks without default actions don't print out a
-detailed comparison between the actual arguments and the expected arguments.
-
-### My program crashed and `ScopedMockLog` spit out tons of messages. Is it a gMock bug?
-
-gMock and `ScopedMockLog` are likely doing the right thing here.
-
-When a test crashes, the failure signal handler will try to log a lot of
-information (the stack trace, and the address map, for example). The messages
-are compounded if you have many threads with depth stacks. When `ScopedMockLog`
-intercepts these messages and finds that they don't match any expectations, it
-prints an error for each of them.
-
-You can learn to ignore the errors, or you can rewrite your expectations to make
-your test more robust, for example, by adding something like:
-
-```cpp
-using ::testing::AnyNumber;
-using ::testing::Not;
-...
-  // Ignores any log not done by us.
-  EXPECT_CALL(log, Log(_, Not(EndsWith("/my_file.cc")), _))
-      .Times(AnyNumber());
-```
-
-### How can I assert that a function is NEVER called?
-
-```cpp
-using ::testing::_;
-...
-  EXPECT_CALL(foo, Bar(_))
-      .Times(0);
-```
-
-### I have a failed test where gMock tells me TWICE that a particular expectation is not satisfied. Isn't this redundant?
-
-When gMock detects a failure, it prints relevant information (the mock function
-arguments, the state of relevant expectations, and etc) to help the user debug.
-If another failure is detected, gMock will do the same, including printing the
-state of relevant expectations.
-
-Sometimes an expectation's state didn't change between two failures, and you'll
-see the same description of the state twice. They are however *not* redundant,
-as they refer to *different points in time*. The fact they are the same *is*
-interesting information.
-
-### I get a heapcheck failure when using a mock object, but using a real object is fine. What can be wrong?
-
-Does the class (hopefully a pure interface) you are mocking have a virtual
-destructor?
-
-Whenever you derive from a base class, make sure its destructor is virtual.
-Otherwise Bad Things will happen. Consider the following code:
-
-```cpp
-class Base {
- public:
-  // Not virtual, but should be.
-  ~Base() { ... }
-  ...
-};
-
-class Derived : public Base {
- public:
-  ...
- private:
-  std::string value_;
-};
-
-...
-  Base* p = new Derived;
-  ...
-  delete p;  // Surprise! ~Base() will be called, but ~Derived() will not
-                 // - value_ is leaked.
-```
-
-By changing `~Base()` to virtual, `~Derived()` will be correctly called when
-`delete p` is executed, and the heap checker will be happy.
-
-### The "newer expectations override older ones" rule makes writing expectations awkward. Why does gMock do that?
-
-When people complain about this, often they are referring to code like:
-
-```cpp
-using ::testing::Return;
-...
-  // foo.Bar() should be called twice, return 1 the first time, and return
-  // 2 the second time.  However, I have to write the expectations in the
-  // reverse order.  This sucks big time!!!
-  EXPECT_CALL(foo, Bar())
-      .WillOnce(Return(2))
-      .RetiresOnSaturation();
-  EXPECT_CALL(foo, Bar())
-      .WillOnce(Return(1))
-      .RetiresOnSaturation();
-```
-
-The problem, is that they didn't pick the **best** way to express the test's
-intent.
-
-By default, expectations don't have to be matched in *any* particular order. If
-you want them to match in a certain order, you need to be explicit. This is
-gMock's (and jMock's) fundamental philosophy: it's easy to accidentally
-over-specify your tests, and we want to make it harder to do so.
-
-There are two better ways to write the test spec. You could either put the
-expectations in sequence:
-
-```cpp
-using ::testing::Return;
-...
-  // foo.Bar() should be called twice, return 1 the first time, and return
-  // 2 the second time.  Using a sequence, we can write the expectations
-  // in their natural order.
-  {
-    InSequence s;
-    EXPECT_CALL(foo, Bar())
-        .WillOnce(Return(1))
-        .RetiresOnSaturation();
-    EXPECT_CALL(foo, Bar())
-        .WillOnce(Return(2))
-        .RetiresOnSaturation();
-  }
-```
-
-or you can put the sequence of actions in the same expectation:
-
-```cpp
-using ::testing::Return;
-...
-  // foo.Bar() should be called twice, return 1 the first time, and return
-  // 2 the second time.
-  EXPECT_CALL(foo, Bar())
-      .WillOnce(Return(1))
-      .WillOnce(Return(2))
-      .RetiresOnSaturation();
-```
-
-Back to the original questions: why does gMock search the expectations (and
-`ON_CALL`s) from back to front? Because this allows a user to set up a mock's
-behavior for the common case early (e.g. in the mock's constructor or the test
-fixture's set-up phase) and customize it with more specific rules later. If
-gMock searches from front to back, this very useful pattern won't be possible.
-
-### gMock prints a warning when a function without EXPECT_CALL is called, even if I have set its behavior using ON_CALL. Would it be reasonable not to show the warning in this case?
-
-When choosing between being neat and being safe, we lean toward the latter. So
-the answer is that we think it's better to show the warning.
-
-Often people write `ON_CALL`s in the mock object's constructor or `SetUp()`, as
-the default behavior rarely changes from test to test. Then in the test body
-they set the expectations, which are often different for each test. Having an
-`ON_CALL` in the set-up part of a test doesn't mean that the calls are expected.
-If there's no `EXPECT_CALL` and the method is called, it's possibly an error. If
-we quietly let the call go through without notifying the user, bugs may creep in
-unnoticed.
-
-If, however, you are sure that the calls are OK, you can write
-
-```cpp
-using ::testing::_;
-...
-  EXPECT_CALL(foo, Bar(_))
-      .WillRepeatedly(...);
-```
-
-instead of
-
-```cpp
-using ::testing::_;
-...
-  ON_CALL(foo, Bar(_))
-      .WillByDefault(...);
-```
-
-This tells gMock that you do expect the calls and no warning should be printed.
-
-Also, you can control the verbosity by specifying `--gmock_verbose=error`. Other
-values are `info` and `warning`. If you find the output too noisy when
-debugging, just choose a less verbose level.
-
-### How can I delete the mock function's argument in an action?
-
-If your mock function takes a pointer argument and you want to delete that
-argument, you can use testing::DeleteArg<N>() to delete the N'th (zero-indexed)
-argument:
-
-```cpp
-using ::testing::_;
-  ...
-  MOCK_METHOD(void, Bar, (X* x, const Y& y));
-  ...
-  EXPECT_CALL(mock_foo_, Bar(_, _))
-      .WillOnce(testing::DeleteArg<0>()));
-```
-
-### How can I perform an arbitrary action on a mock function's argument?
-
-If you find yourself needing to perform some action that's not supported by
-gMock directly, remember that you can define your own actions using
-[`MakeAction()`](#NewMonoActions) or
-[`MakePolymorphicAction()`](#NewPolyActions), or you can write a stub function
-and invoke it using [`Invoke()`](#FunctionsAsActions).
-
-```cpp
-using ::testing::_;
-using ::testing::Invoke;
-  ...
-  MOCK_METHOD(void, Bar, (X* p));
-  ...
-  EXPECT_CALL(mock_foo_, Bar(_))
-      .WillOnce(Invoke(MyAction(...)));
-```
-
-### My code calls a static/global function. Can I mock it?
-
-You can, but you need to make some changes.
-
-In general, if you find yourself needing to mock a static function, it's a sign
-that your modules are too tightly coupled (and less flexible, less reusable,
-less testable, etc). You are probably better off defining a small interface and
-call the function through that interface, which then can be easily mocked. It's
-a bit of work initially, but usually pays for itself quickly.
-
-This Google Testing Blog
-[post](https://testing.googleblog.com/2008/06/defeat-static-cling.html) says it
-excellently. Check it out.
-
-### My mock object needs to do complex stuff. It's a lot of pain to specify the actions. gMock sucks!
-
-I know it's not a question, but you get an answer for free any way. :-)
-
-With gMock, you can create mocks in C++ easily. And people might be tempted to
-use them everywhere. Sometimes they work great, and sometimes you may find them,
-well, a pain to use. So, what's wrong in the latter case?
-
-When you write a test without using mocks, you exercise the code and assert that
-it returns the correct value or that the system is in an expected state. This is
-sometimes called "state-based testing".
-
-Mocks are great for what some call "interaction-based" testing: instead of
-checking the system state at the very end, mock objects verify that they are
-invoked the right way and report an error as soon as it arises, giving you a
-handle on the precise context in which the error was triggered. This is often
-more effective and economical to do than state-based testing.
-
-If you are doing state-based testing and using a test double just to simulate
-the real object, you are probably better off using a fake. Using a mock in this
-case causes pain, as it's not a strong point for mocks to perform complex
-actions. If you experience this and think that mocks suck, you are just not
-using the right tool for your problem. Or, you might be trying to solve the
-wrong problem. :-)
-
-### I got a warning "Uninteresting function call encountered - default action taken.." Should I panic?
-
-By all means, NO! It's just an FYI. :-)
-
-What it means is that you have a mock function, you haven't set any expectations
-on it (by gMock's rule this means that you are not interested in calls to this
-function and therefore it can be called any number of times), and it is called.
-That's OK - you didn't say it's not OK to call the function!
-
-What if you actually meant to disallow this function to be called, but forgot to
-write `EXPECT_CALL(foo, Bar()).Times(0)`? While one can argue that it's the
-user's fault, gMock tries to be nice and prints you a note.
-
-So, when you see the message and believe that there shouldn't be any
-uninteresting calls, you should investigate what's going on. To make your life
-easier, gMock dumps the stack trace when an uninteresting call is encountered.
-From that you can figure out which mock function it is, and how it is called.
-
-### I want to define a custom action. Should I use Invoke() or implement the ActionInterface interface?
-
-Either way is fine - you want to choose the one that's more convenient for your
-circumstance.
-
-Usually, if your action is for a particular function type, defining it using
-`Invoke()` should be easier; if your action can be used in functions of
-different types (e.g. if you are defining `Return(*value*)`),
-`MakePolymorphicAction()` is easiest. Sometimes you want precise control on what
-types of functions the action can be used in, and implementing `ActionInterface`
-is the way to go here. See the implementation of `Return()` in
-`testing/base/public/gmock-actions.h` for an example.
-
-### I use SetArgPointee() in WillOnce(), but gcc complains about "conflicting return type specified". What does it mean?
-
-You got this error as gMock has no idea what value it should return when the
-mock method is called. `SetArgPointee()` says what the side effect is, but
-doesn't say what the return value should be. You need `DoAll()` to chain a
-`SetArgPointee()` with a `Return()` that provides a value appropriate to the API
-being mocked.
-
-See this [recipe](gmock_cook_book.md#mocking-side-effects) for more details and
-an example.
-
-### I have a huge mock class, and Microsoft Visual C++ runs out of memory when compiling it. What can I do?
-
-We've noticed that when the `/clr` compiler flag is used, Visual C++ uses 5~6
-times as much memory when compiling a mock class. We suggest to avoid `/clr`
-when compiling native C++ mocks.
diff --git a/third_party/googletest/docs/gmock_for_dummies.md b/third_party/googletest/docs/gmock_for_dummies.md
deleted file mode 100644
index 370f17e..0000000
--- a/third_party/googletest/docs/gmock_for_dummies.md
+++ /dev/null
@@ -1,699 +0,0 @@
-# gMock for Dummies
-
-## What Is gMock?
-
-When you write a prototype or test, often it's not feasible or wise to rely on
-real objects entirely. A **mock object** implements the same interface as a real
-object (so it can be used as one), but lets you specify at run time how it will
-be used and what it should do (which methods will be called? in which order? how
-many times? with what arguments? what will they return? etc).
-
-It is easy to confuse the term *fake objects* with mock objects. Fakes and mocks
-actually mean very different things in the Test-Driven Development (TDD)
-community:
-
-*   **Fake** objects have working implementations, but usually take some
-    shortcut (perhaps to make the operations less expensive), which makes them
-    not suitable for production. An in-memory file system would be an example of
-    a fake.
-*   **Mocks** are objects pre-programmed with *expectations*, which form a
-    specification of the calls they are expected to receive.
-
-If all this seems too abstract for you, don't worry - the most important thing
-to remember is that a mock allows you to check the *interaction* between itself
-and code that uses it. The difference between fakes and mocks shall become much
-clearer once you start to use mocks.
-
-**gMock** is a library (sometimes we also call it a "framework" to make it sound
-cool) for creating mock classes and using them. It does to C++ what
-jMock/EasyMock does to Java (well, more or less).
-
-When using gMock,
-
-1.  first, you use some simple macros to describe the interface you want to
-    mock, and they will expand to the implementation of your mock class;
-2.  next, you create some mock objects and specify its expectations and behavior
-    using an intuitive syntax;
-3.  then you exercise code that uses the mock objects. gMock will catch any
-    violation to the expectations as soon as it arises.
-
-## Why gMock?
-
-While mock objects help you remove unnecessary dependencies in tests and make
-them fast and reliable, using mocks manually in C++ is *hard*:
-
-*   Someone has to implement the mocks. The job is usually tedious and
-    error-prone. No wonder people go great distance to avoid it.
-*   The quality of those manually written mocks is a bit, uh, unpredictable. You
-    may see some really polished ones, but you may also see some that were
-    hacked up in a hurry and have all sorts of ad hoc restrictions.
-*   The knowledge you gained from using one mock doesn't transfer to the next
-    one.
-
-In contrast, Java and Python programmers have some fine mock frameworks (jMock,
-EasyMock, etc), which automate the creation of mocks. As a result, mocking is a
-proven effective technique and widely adopted practice in those communities.
-Having the right tool absolutely makes the difference.
-
-gMock was built to help C++ programmers. It was inspired by jMock and EasyMock,
-but designed with C++'s specifics in mind. It is your friend if any of the
-following problems is bothering you:
-
-*   You are stuck with a sub-optimal design and wish you had done more
-    prototyping before it was too late, but prototyping in C++ is by no means
-    "rapid".
-*   Your tests are slow as they depend on too many libraries or use expensive
-    resources (e.g. a database).
-*   Your tests are brittle as some resources they use are unreliable (e.g. the
-    network).
-*   You want to test how your code handles a failure (e.g. a file checksum
-    error), but it's not easy to cause one.
-*   You need to make sure that your module interacts with other modules in the
-    right way, but it's hard to observe the interaction; therefore you resort to
-    observing the side effects at the end of the action, but it's awkward at
-    best.
-*   You want to "mock out" your dependencies, except that they don't have mock
-    implementations yet; and, frankly, you aren't thrilled by some of those
-    hand-written mocks.
-
-We encourage you to use gMock as
-
-*   a *design* tool, for it lets you experiment with your interface design early
-    and often. More iterations lead to better designs!
-*   a *testing* tool to cut your tests' outbound dependencies and probe the
-    interaction between your module and its collaborators.
-
-## Getting Started
-
-gMock is bundled with googletest.
-
-## A Case for Mock Turtles
-
-Let's look at an example. Suppose you are developing a graphics program that
-relies on a [LOGO](http://en.wikipedia.org/wiki/Logo_programming_language)-like
-API for drawing. How would you test that it does the right thing? Well, you can
-run it and compare the screen with a golden screen snapshot, but let's admit it:
-tests like this are expensive to run and fragile (What if you just upgraded to a
-shiny new graphics card that has better anti-aliasing? Suddenly you have to
-update all your golden images.). It would be too painful if all your tests are
-like this. Fortunately, you learned about
-[Dependency Injection](http://en.wikipedia.org/wiki/Dependency_injection) and know the right thing
-to do: instead of having your application talk to the system API directly, wrap
-the API in an interface (say, `Turtle`) and code to that interface:
-
-```cpp
-class Turtle {
-  ...
-  virtual ~Turtle() {}
-  virtual void PenUp() = 0;
-  virtual void PenDown() = 0;
-  virtual void Forward(int distance) = 0;
-  virtual void Turn(int degrees) = 0;
-  virtual void GoTo(int x, int y) = 0;
-  virtual int GetX() const = 0;
-  virtual int GetY() const = 0;
-};
-```
-
-(Note that the destructor of `Turtle` **must** be virtual, as is the case for
-**all** classes you intend to inherit from - otherwise the destructor of the
-derived class will not be called when you delete an object through a base
-pointer, and you'll get corrupted program states like memory leaks.)
-
-You can control whether the turtle's movement will leave a trace using `PenUp()`
-and `PenDown()`, and control its movement using `Forward()`, `Turn()`, and
-`GoTo()`. Finally, `GetX()` and `GetY()` tell you the current position of the
-turtle.
-
-Your program will normally use a real implementation of this interface. In
-tests, you can use a mock implementation instead. This allows you to easily
-check what drawing primitives your program is calling, with what arguments, and
-in which order. Tests written this way are much more robust (they won't break
-because your new machine does anti-aliasing differently), easier to read and
-maintain (the intent of a test is expressed in the code, not in some binary
-images), and run *much, much faster*.
-
-## Writing the Mock Class
-
-If you are lucky, the mocks you need to use have already been implemented by
-some nice people. If, however, you find yourself in the position to write a mock
-class, relax - gMock turns this task into a fun game! (Well, almost.)
-
-### How to Define It
-
-Using the `Turtle` interface as example, here are the simple steps you need to
-follow:
-
-*   Derive a class `MockTurtle` from `Turtle`.
-*   Take a *virtual* function of `Turtle` (while it's possible to
-    [mock non-virtual methods using templates](gmock_cook_book.md#MockingNonVirtualMethods),
-    it's much more involved).
-*   In the `public:` section of the child class, write `MOCK_METHOD();`
-*   Now comes the fun part: you take the function signature, cut-and-paste it
-    into the macro, and add two commas - one between the return type and the
-    name, another between the name and the argument list.
-*   If you're mocking a const method, add a 4th parameter containing `(const)`
-    (the parentheses are required).
-*   Since you're overriding a virtual method, we suggest adding the `override`
-    keyword. For const methods the 4th parameter becomes `(const, override)`,
-    for non-const methods just `(override)`. This isn't mandatory.
-*   Repeat until all virtual functions you want to mock are done. (It goes
-    without saying that *all* pure virtual methods in your abstract class must
-    be either mocked or overridden.)
-
-After the process, you should have something like:
-
-```cpp
-#include "gmock/gmock.h"  // Brings in gMock.
-
-class MockTurtle : public Turtle {
- public:
-  ...
-  MOCK_METHOD(void, PenUp, (), (override));
-  MOCK_METHOD(void, PenDown, (), (override));
-  MOCK_METHOD(void, Forward, (int distance), (override));
-  MOCK_METHOD(void, Turn, (int degrees), (override));
-  MOCK_METHOD(void, GoTo, (int x, int y), (override));
-  MOCK_METHOD(int, GetX, (), (const, override));
-  MOCK_METHOD(int, GetY, (), (const, override));
-};
-```
-
-You don't need to define these mock methods somewhere else - the `MOCK_METHOD`
-macro will generate the definitions for you. It's that simple!
-
-### Where to Put It
-
-When you define a mock class, you need to decide where to put its definition.
-Some people put it in a `_test.cc`. This is fine when the interface being mocked
-(say, `Foo`) is owned by the same person or team. Otherwise, when the owner of
-`Foo` changes it, your test could break. (You can't really expect `Foo`'s
-maintainer to fix every test that uses `Foo`, can you?)
-
-So, the rule of thumb is: if you need to mock `Foo` and it's owned by others,
-define the mock class in `Foo`'s package (better, in a `testing` sub-package
-such that you can clearly separate production code and testing utilities), put
-it in a `.h` and a `cc_library`. Then everyone can reference them from their
-tests. If `Foo` ever changes, there is only one copy of `MockFoo` to change, and
-only tests that depend on the changed methods need to be fixed.
-
-Another way to do it: you can introduce a thin layer `FooAdaptor` on top of
-`Foo` and code to this new interface. Since you own `FooAdaptor`, you can absorb
-changes in `Foo` much more easily. While this is more work initially, carefully
-choosing the adaptor interface can make your code easier to write and more
-readable (a net win in the long run), as you can choose `FooAdaptor` to fit your
-specific domain much better than `Foo` does.
-
-## Using Mocks in Tests
-
-Once you have a mock class, using it is easy. The typical work flow is:
-
-1.  Import the gMock names from the `testing` namespace such that you can use
-    them unqualified (You only have to do it once per file). Remember that
-    namespaces are a good idea.
-2.  Create some mock objects.
-3.  Specify your expectations on them (How many times will a method be called?
-    With what arguments? What should it do? etc.).
-4.  Exercise some code that uses the mocks; optionally, check the result using
-    googletest assertions. If a mock method is called more than expected or with
-    wrong arguments, you'll get an error immediately.
-5.  When a mock is destructed, gMock will automatically check whether all
-    expectations on it have been satisfied.
-
-Here's an example:
-
-```cpp
-#include "path/to/mock-turtle.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-using ::testing::AtLeast;                         // #1
-
-TEST(PainterTest, CanDrawSomething) {
-  MockTurtle turtle;                              // #2
-  EXPECT_CALL(turtle, PenDown())                  // #3
-      .Times(AtLeast(1));
-
-  Painter painter(&turtle);                       // #4
-
-  EXPECT_TRUE(painter.DrawCircle(0, 0, 10));      // #5
-}
-```
-
-As you might have guessed, this test checks that `PenDown()` is called at least
-once. If the `painter` object didn't call this method, your test will fail with
-a message like this:
-
-```text
-path/to/my_test.cc:119: Failure
-Actual function call count doesn't match this expectation:
-Actually: never called;
-Expected: called at least once.
-Stack trace:
-...
-```
-
-**Tip 1:** If you run the test from an Emacs buffer, you can hit `<Enter>` on
-the line number to jump right to the failed expectation.
-
-**Tip 2:** If your mock objects are never deleted, the final verification won't
-happen. Therefore it's a good idea to turn on the heap checker in your tests
-when you allocate mocks on the heap. You get that automatically if you use the
-`gtest_main` library already.
-
-**Important note:** gMock requires expectations to be set **before** the mock
-functions are called, otherwise the behavior is **undefined**. In particular,
-you mustn't interleave `EXPECT_CALL()s` and calls to the mock functions.
-
-This means `EXPECT_CALL()` should be read as expecting that a call will occur
-*in the future*, not that a call has occurred. Why does gMock work like that?
-Well, specifying the expectation beforehand allows gMock to report a violation
-as soon as it rises, when the context (stack trace, etc) is still available.
-This makes debugging much easier.
-
-Admittedly, this test is contrived and doesn't do much. You can easily achieve
-the same effect without using gMock. However, as we shall reveal soon, gMock
-allows you to do *so much more* with the mocks.
-
-## Setting Expectations
-
-The key to using a mock object successfully is to set the *right expectations*
-on it. If you set the expectations too strict, your test will fail as the result
-of unrelated changes. If you set them too loose, bugs can slip through. You want
-to do it just right such that your test can catch exactly the kind of bugs you
-intend it to catch. gMock provides the necessary means for you to do it "just
-right."
-
-### General Syntax
-
-In gMock we use the `EXPECT_CALL()` macro to set an expectation on a mock
-method. The general syntax is:
-
-```cpp
-EXPECT_CALL(mock_object, method(matchers))
-    .Times(cardinality)
-    .WillOnce(action)
-    .WillRepeatedly(action);
-```
-
-The macro has two arguments: first the mock object, and then the method and its
-arguments. Note that the two are separated by a comma (`,`), not a period (`.`).
-(Why using a comma? The answer is that it was necessary for technical reasons.)
-If the method is not overloaded, the macro can also be called without matchers:
-
-```cpp
-EXPECT_CALL(mock_object, non-overloaded-method)
-    .Times(cardinality)
-    .WillOnce(action)
-    .WillRepeatedly(action);
-```
-
-This syntax allows the test writer to specify "called with any arguments"
-without explicitly specifying the number or types of arguments. To avoid
-unintended ambiguity, this syntax may only be used for methods that are not
-overloaded.
-
-Either form of the macro can be followed by some optional *clauses* that provide
-more information about the expectation. We'll discuss how each clause works in
-the coming sections.
-
-This syntax is designed to make an expectation read like English. For example,
-you can probably guess that
-
-```cpp
-using ::testing::Return;
-...
-EXPECT_CALL(turtle, GetX())
-    .Times(5)
-    .WillOnce(Return(100))
-    .WillOnce(Return(150))
-    .WillRepeatedly(Return(200));
-```
-
-says that the `turtle` object's `GetX()` method will be called five times, it
-will return 100 the first time, 150 the second time, and then 200 every time.
-Some people like to call this style of syntax a Domain-Specific Language (DSL).
-
-{: .callout .note}
-**Note:** Why do we use a macro to do this? Well it serves two purposes: first
-it makes expectations easily identifiable (either by `grep` or by a human
-reader), and second it allows gMock to include the source file location of a
-failed expectation in messages, making debugging easier.
-
-### Matchers: What Arguments Do We Expect?
-
-When a mock function takes arguments, we may specify what arguments we are
-expecting, for example:
-
-```cpp
-// Expects the turtle to move forward by 100 units.
-EXPECT_CALL(turtle, Forward(100));
-```
-
-Oftentimes you do not want to be too specific. Remember that talk about tests
-being too rigid? Over specification leads to brittle tests and obscures the
-intent of tests. Therefore we encourage you to specify only what's necessary—no
-more, no less. If you aren't interested in the value of an argument, write `_`
-as the argument, which means "anything goes":
-
-```cpp
-using ::testing::_;
-...
-// Expects that the turtle jumps to somewhere on the x=50 line.
-EXPECT_CALL(turtle, GoTo(50, _));
-```
-
-`_` is an instance of what we call **matchers**. A matcher is like a predicate
-and can test whether an argument is what we'd expect. You can use a matcher
-inside `EXPECT_CALL()` wherever a function argument is expected. `_` is a
-convenient way of saying "any value".
-
-In the above examples, `100` and `50` are also matchers; implicitly, they are
-the same as `Eq(100)` and `Eq(50)`, which specify that the argument must be
-equal (using `operator==`) to the matcher argument. There are many
-[built-in matchers](reference/matchers.md) for common types (as well as
-[custom matchers](gmock_cook_book.md#NewMatchers)); for example:
-
-```cpp
-using ::testing::Ge;
-...
-// Expects the turtle moves forward by at least 100.
-EXPECT_CALL(turtle, Forward(Ge(100)));
-```
-
-If you don't care about *any* arguments, rather than specify `_` for each of
-them you may instead omit the parameter list:
-
-```cpp
-// Expects the turtle to move forward.
-EXPECT_CALL(turtle, Forward);
-// Expects the turtle to jump somewhere.
-EXPECT_CALL(turtle, GoTo);
-```
-
-This works for all non-overloaded methods; if a method is overloaded, you need
-to help gMock resolve which overload is expected by specifying the number of
-arguments and possibly also the
-[types of the arguments](gmock_cook_book.md#SelectOverload).
-
-### Cardinalities: How Many Times Will It Be Called?
-
-The first clause we can specify following an `EXPECT_CALL()` is `Times()`. We
-call its argument a **cardinality** as it tells *how many times* the call should
-occur. It allows us to repeat an expectation many times without actually writing
-it as many times. More importantly, a cardinality can be "fuzzy", just like a
-matcher can be. This allows a user to express the intent of a test exactly.
-
-An interesting special case is when we say `Times(0)`. You may have guessed - it
-means that the function shouldn't be called with the given arguments at all, and
-gMock will report a googletest failure whenever the function is (wrongfully)
-called.
-
-We've seen `AtLeast(n)` as an example of fuzzy cardinalities earlier. For the
-list of built-in cardinalities you can use, see
-[here](gmock_cheat_sheet.md#CardinalityList).
-
-The `Times()` clause can be omitted. **If you omit `Times()`, gMock will infer
-the cardinality for you.** The rules are easy to remember:
-
-*   If **neither** `WillOnce()` **nor** `WillRepeatedly()` is in the
-    `EXPECT_CALL()`, the inferred cardinality is `Times(1)`.
-*   If there are *n* `WillOnce()`'s but **no** `WillRepeatedly()`, where *n* >=
-    1, the cardinality is `Times(n)`.
-*   If there are *n* `WillOnce()`'s and **one** `WillRepeatedly()`, where *n* >=
-    0, the cardinality is `Times(AtLeast(n))`.
-
-**Quick quiz:** what do you think will happen if a function is expected to be
-called twice but actually called four times?
-
-### Actions: What Should It Do?
-
-Remember that a mock object doesn't really have a working implementation? We as
-users have to tell it what to do when a method is invoked. This is easy in
-gMock.
-
-First, if the return type of a mock function is a built-in type or a pointer,
-the function has a **default action** (a `void` function will just return, a
-`bool` function will return `false`, and other functions will return 0). In
-addition, in C++ 11 and above, a mock function whose return type is
-default-constructible (i.e. has a default constructor) has a default action of
-returning a default-constructed value. If you don't say anything, this behavior
-will be used.
-
-Second, if a mock function doesn't have a default action, or the default action
-doesn't suit you, you can specify the action to be taken each time the
-expectation matches using a series of `WillOnce()` clauses followed by an
-optional `WillRepeatedly()`. For example,
-
-```cpp
-using ::testing::Return;
-...
-EXPECT_CALL(turtle, GetX())
-     .WillOnce(Return(100))
-     .WillOnce(Return(200))
-     .WillOnce(Return(300));
-```
-
-says that `turtle.GetX()` will be called *exactly three times* (gMock inferred
-this from how many `WillOnce()` clauses we've written, since we didn't
-explicitly write `Times()`), and will return 100, 200, and 300 respectively.
-
-```cpp
-using ::testing::Return;
-...
-EXPECT_CALL(turtle, GetY())
-     .WillOnce(Return(100))
-     .WillOnce(Return(200))
-     .WillRepeatedly(Return(300));
-```
-
-says that `turtle.GetY()` will be called *at least twice* (gMock knows this as
-we've written two `WillOnce()` clauses and a `WillRepeatedly()` while having no
-explicit `Times()`), will return 100 and 200 respectively the first two times,
-and 300 from the third time on.
-
-Of course, if you explicitly write a `Times()`, gMock will not try to infer the
-cardinality itself. What if the number you specified is larger than there are
-`WillOnce()` clauses? Well, after all `WillOnce()`s are used up, gMock will do
-the *default* action for the function every time (unless, of course, you have a
-`WillRepeatedly()`.).
-
-What can we do inside `WillOnce()` besides `Return()`? You can return a
-reference using `ReturnRef(*variable*)`, or invoke a pre-defined function, among
-[others](gmock_cook_book.md#using-actions).
-
-**Important note:** The `EXPECT_CALL()` statement evaluates the action clause
-only once, even though the action may be performed many times. Therefore you
-must be careful about side effects. The following may not do what you want:
-
-```cpp
-using ::testing::Return;
-...
-int n = 100;
-EXPECT_CALL(turtle, GetX())
-    .Times(4)
-    .WillRepeatedly(Return(n++));
-```
-
-Instead of returning 100, 101, 102, ..., consecutively, this mock function will
-always return 100 as `n++` is only evaluated once. Similarly, `Return(new Foo)`
-will create a new `Foo` object when the `EXPECT_CALL()` is executed, and will
-return the same pointer every time. If you want the side effect to happen every
-time, you need to define a custom action, which we'll teach in the
-[cook book](gmock_cook_book.md).
-
-Time for another quiz! What do you think the following means?
-
-```cpp
-using ::testing::Return;
-...
-EXPECT_CALL(turtle, GetY())
-    .Times(4)
-    .WillOnce(Return(100));
-```
-
-Obviously `turtle.GetY()` is expected to be called four times. But if you think
-it will return 100 every time, think twice! Remember that one `WillOnce()`
-clause will be consumed each time the function is invoked and the default action
-will be taken afterwards. So the right answer is that `turtle.GetY()` will
-return 100 the first time, but **return 0 from the second time on**, as
-returning 0 is the default action for `int` functions.
-
-### Using Multiple Expectations {#MultiExpectations}
-
-So far we've only shown examples where you have a single expectation. More
-realistically, you'll specify expectations on multiple mock methods which may be
-from multiple mock objects.
-
-By default, when a mock method is invoked, gMock will search the expectations in
-the **reverse order** they are defined, and stop when an active expectation that
-matches the arguments is found (you can think of it as "newer rules override
-older ones."). If the matching expectation cannot take any more calls, you will
-get an upper-bound-violated failure. Here's an example:
-
-```cpp
-using ::testing::_;
-...
-EXPECT_CALL(turtle, Forward(_));  // #1
-EXPECT_CALL(turtle, Forward(10))  // #2
-    .Times(2);
-```
-
-If `Forward(10)` is called three times in a row, the third time it will be an
-error, as the last matching expectation (#2) has been saturated. If, however,
-the third `Forward(10)` call is replaced by `Forward(20)`, then it would be OK,
-as now #1 will be the matching expectation.
-
-{: .callout .note}
-**Note:** Why does gMock search for a match in the *reverse* order of the
-expectations? The reason is that this allows a user to set up the default
-expectations in a mock object's constructor or the test fixture's set-up phase
-and then customize the mock by writing more specific expectations in the test
-body. So, if you have two expectations on the same method, you want to put the
-one with more specific matchers **after** the other, or the more specific rule
-would be shadowed by the more general one that comes after it.
-
-{: .callout .tip}
-**Tip:** It is very common to start with a catch-all expectation for a method
-and `Times(AnyNumber())` (omitting arguments, or with `_` for all arguments, if
-overloaded). This makes any calls to the method expected. This is not necessary
-for methods that are not mentioned at all (these are "uninteresting"), but is
-useful for methods that have some expectations, but for which other calls are
-ok. See
-[Understanding Uninteresting vs Unexpected Calls](gmock_cook_book.md#uninteresting-vs-unexpected).
-
-### Ordered vs Unordered Calls {#OrderedCalls}
-
-By default, an expectation can match a call even though an earlier expectation
-hasn't been satisfied. In other words, the calls don't have to occur in the
-order the expectations are specified.
-
-Sometimes, you may want all the expected calls to occur in a strict order. To
-say this in gMock is easy:
-
-```cpp
-using ::testing::InSequence;
-...
-TEST(FooTest, DrawsLineSegment) {
-  ...
-  {
-    InSequence seq;
-
-    EXPECT_CALL(turtle, PenDown());
-    EXPECT_CALL(turtle, Forward(100));
-    EXPECT_CALL(turtle, PenUp());
-  }
-  Foo();
-}
-```
-
-By creating an object of type `InSequence`, all expectations in its scope are
-put into a *sequence* and have to occur *sequentially*. Since we are just
-relying on the constructor and destructor of this object to do the actual work,
-its name is really irrelevant.
-
-In this example, we test that `Foo()` calls the three expected functions in the
-order as written. If a call is made out-of-order, it will be an error.
-
-(What if you care about the relative order of some of the calls, but not all of
-them? Can you specify an arbitrary partial order? The answer is ... yes! The
-details can be found [here](gmock_cook_book.md#OrderedCalls).)
-
-### All Expectations Are Sticky (Unless Said Otherwise) {#StickyExpectations}
-
-Now let's do a quick quiz to see how well you can use this mock stuff already.
-How would you test that the turtle is asked to go to the origin *exactly twice*
-(you want to ignore any other instructions it receives)?
-
-After you've come up with your answer, take a look at ours and compare notes
-(solve it yourself first - don't cheat!):
-
-```cpp
-using ::testing::_;
-using ::testing::AnyNumber;
-...
-EXPECT_CALL(turtle, GoTo(_, _))  // #1
-     .Times(AnyNumber());
-EXPECT_CALL(turtle, GoTo(0, 0))  // #2
-     .Times(2);
-```
-
-Suppose `turtle.GoTo(0, 0)` is called three times. In the third time, gMock will
-see that the arguments match expectation #2 (remember that we always pick the
-last matching expectation). Now, since we said that there should be only two
-such calls, gMock will report an error immediately. This is basically what we've
-told you in the [Using Multiple Expectations](#MultiExpectations) section above.
-
-This example shows that **expectations in gMock are "sticky" by default**, in
-the sense that they remain active even after we have reached their invocation
-upper bounds. This is an important rule to remember, as it affects the meaning
-of the spec, and is **different** to how it's done in many other mocking
-frameworks (Why'd we do that? Because we think our rule makes the common cases
-easier to express and understand.).
-
-Simple? Let's see if you've really understood it: what does the following code
-say?
-
-```cpp
-using ::testing::Return;
-...
-for (int i = n; i > 0; i--) {
-  EXPECT_CALL(turtle, GetX())
-      .WillOnce(Return(10*i));
-}
-```
-
-If you think it says that `turtle.GetX()` will be called `n` times and will
-return 10, 20, 30, ..., consecutively, think twice! The problem is that, as we
-said, expectations are sticky. So, the second time `turtle.GetX()` is called,
-the last (latest) `EXPECT_CALL()` statement will match, and will immediately
-lead to an "upper bound violated" error - this piece of code is not very useful!
-
-One correct way of saying that `turtle.GetX()` will return 10, 20, 30, ..., is
-to explicitly say that the expectations are *not* sticky. In other words, they
-should *retire* as soon as they are saturated:
-
-```cpp
-using ::testing::Return;
-...
-for (int i = n; i > 0; i--) {
-  EXPECT_CALL(turtle, GetX())
-      .WillOnce(Return(10*i))
-      .RetiresOnSaturation();
-}
-```
-
-And, there's a better way to do it: in this case, we expect the calls to occur
-in a specific order, and we line up the actions to match the order. Since the
-order is important here, we should make it explicit using a sequence:
-
-```cpp
-using ::testing::InSequence;
-using ::testing::Return;
-...
-{
-  InSequence s;
-
-  for (int i = 1; i <= n; i++) {
-    EXPECT_CALL(turtle, GetX())
-        .WillOnce(Return(10*i))
-        .RetiresOnSaturation();
-  }
-}
-```
-
-By the way, the other situation where an expectation may *not* be sticky is when
-it's in a sequence - as soon as another expectation that comes after it in the
-sequence has been used, it automatically retires (and will never be used to
-match any call).
-
-### Uninteresting Calls
-
-A mock object may have many methods, and not all of them are that interesting.
-For example, in some tests we may not care about how many times `GetX()` and
-`GetY()` get called.
-
-In gMock, if you are not interested in a method, just don't say anything about
-it. If a call to this method occurs, you'll see a warning in the test output,
-but it won't be a failure. This is called "naggy" behavior; to change, see
-[The Nice, the Strict, and the Naggy](gmock_cook_book.md#NiceStrictNaggy).
diff --git a/third_party/googletest/docs/index.md b/third_party/googletest/docs/index.md
deleted file mode 100644
index b162c74..0000000
--- a/third_party/googletest/docs/index.md
+++ /dev/null
@@ -1,22 +0,0 @@
-# GoogleTest User's Guide
-
-## Welcome to GoogleTest!
-
-GoogleTest is Google's C++ testing and mocking framework. This user's guide has
-the following contents:
-
-*   [GoogleTest Primer](primer.md) - Teaches you how to write simple tests using
-    GoogleTest. Read this first if you are new to GoogleTest.
-*   [GoogleTest Advanced](advanced.md) - Read this when you've finished the
-    Primer and want to utilize GoogleTest to its full potential.
-*   [GoogleTest Samples](samples.md) - Describes some GoogleTest samples.
-*   [GoogleTest FAQ](faq.md) - Have a question? Want some tips? Check here
-    first.
-*   [Mocking for Dummies](gmock_for_dummies.md) - Teaches you how to create mock
-    objects and use them in tests.
-*   [Mocking Cookbook](gmock_cook_book.md) - Includes tips and approaches to
-    common mocking use cases.
-*   [Mocking Cheat Sheet](gmock_cheat_sheet.md) - A handy reference for
-    matchers, actions, invariants, and more.
-*   [Mocking FAQ](gmock_faq.md) - Contains answers to some mocking-specific
-    questions.
diff --git a/third_party/googletest/docs/pkgconfig.md b/third_party/googletest/docs/pkgconfig.md
deleted file mode 100644
index 768e9b4..0000000
--- a/third_party/googletest/docs/pkgconfig.md
+++ /dev/null
@@ -1,148 +0,0 @@
-## Using GoogleTest from various build systems
-
-GoogleTest comes with pkg-config files that can be used to determine all
-necessary flags for compiling and linking to GoogleTest (and GoogleMock).
-Pkg-config is a standardised plain-text format containing
-
-*   the includedir (-I) path
-*   necessary macro (-D) definitions
-*   further required flags (-pthread)
-*   the library (-L) path
-*   the library (-l) to link to
-
-All current build systems support pkg-config in one way or another. For all
-examples here we assume you want to compile the sample
-`samples/sample3_unittest.cc`.
-
-### CMake
-
-Using `pkg-config` in CMake is fairly easy:
-
-```cmake
-cmake_minimum_required(VERSION 3.0)
-
-cmake_policy(SET CMP0048 NEW)
-project(my_gtest_pkgconfig VERSION 0.0.1 LANGUAGES CXX)
-
-find_package(PkgConfig)
-pkg_search_module(GTEST REQUIRED gtest_main)
-
-add_executable(testapp samples/sample3_unittest.cc)
-target_link_libraries(testapp ${GTEST_LDFLAGS})
-target_compile_options(testapp PUBLIC ${GTEST_CFLAGS})
-
-include(CTest)
-add_test(first_and_only_test testapp)
-```
-
-It is generally recommended that you use `target_compile_options` + `_CFLAGS`
-over `target_include_directories` + `_INCLUDE_DIRS` as the former includes not
-just -I flags (GoogleTest might require a macro indicating to internal headers
-that all libraries have been compiled with threading enabled. In addition,
-GoogleTest might also require `-pthread` in the compiling step, and as such
-splitting the pkg-config `Cflags` variable into include dirs and macros for
-`target_compile_definitions()` might still miss this). The same recommendation
-goes for using `_LDFLAGS` over the more commonplace `_LIBRARIES`, which happens
-to discard `-L` flags and `-pthread`.
-
-### Help! pkg-config can't find GoogleTest!
-
-Let's say you have a `CMakeLists.txt` along the lines of the one in this
-tutorial and you try to run `cmake`. It is very possible that you get a failure
-along the lines of:
-
-```
--- Checking for one of the modules 'gtest_main'
-CMake Error at /usr/share/cmake/Modules/FindPkgConfig.cmake:640 (message):
-  None of the required 'gtest_main' found
-```
-
-These failures are common if you installed GoogleTest yourself and have not
-sourced it from a distro or other package manager. If so, you need to tell
-pkg-config where it can find the `.pc` files containing the information. Say you
-installed GoogleTest to `/usr/local`, then it might be that the `.pc` files are
-installed under `/usr/local/lib64/pkgconfig`. If you set
-
-```
-export PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig
-```
-
-pkg-config will also try to look in `PKG_CONFIG_PATH` to find `gtest_main.pc`.
-
-### Using pkg-config in a cross-compilation setting
-
-Pkg-config can be used in a cross-compilation setting too. To do this, let's
-assume the final prefix of the cross-compiled installation will be `/usr`, and
-your sysroot is `/home/MYUSER/sysroot`. Configure and install GTest using
-
-```
-mkdir build && cmake -DCMAKE_INSTALL_PREFIX=/usr ..
-```
-
-Install into the sysroot using `DESTDIR`:
-
-```
-make -j install DESTDIR=/home/MYUSER/sysroot
-```
-
-Before we continue, it is recommended to **always** define the following two
-variables for pkg-config in a cross-compilation setting:
-
-```
-export PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=yes
-export PKG_CONFIG_ALLOW_SYSTEM_LIBS=yes
-```
-
-otherwise `pkg-config` will filter `-I` and `-L` flags against standard prefixes
-such as `/usr` (see https://bugs.freedesktop.org/show_bug.cgi?id=28264#c3 for
-reasons why this stripping needs to occur usually).
-
-If you look at the generated pkg-config file, it will look something like
-
-```
-libdir=/usr/lib64
-includedir=/usr/include
-
-Name: gtest
-Description: GoogleTest (without main() function)
-Version: 1.10.0
-URL: https://github.com/google/googletest
-Libs: -L${libdir} -lgtest -lpthread
-Cflags: -I${includedir} -DGTEST_HAS_PTHREAD=1 -lpthread
-```
-
-Notice that the sysroot is not included in `libdir` and `includedir`! If you try
-to run `pkg-config` with the correct
-`PKG_CONFIG_LIBDIR=/home/MYUSER/sysroot/usr/lib64/pkgconfig` against this `.pc`
-file, you will get
-
-```
-$ pkg-config --cflags gtest
--DGTEST_HAS_PTHREAD=1 -lpthread -I/usr/include
-$ pkg-config --libs gtest
--L/usr/lib64 -lgtest -lpthread
-```
-
-which is obviously wrong and points to the `CBUILD` and not `CHOST` root. In
-order to use this in a cross-compilation setting, we need to tell pkg-config to
-inject the actual sysroot into `-I` and `-L` variables. Let us now tell
-pkg-config about the actual sysroot
-
-```
-export PKG_CONFIG_DIR=
-export PKG_CONFIG_SYSROOT_DIR=/home/MYUSER/sysroot
-export PKG_CONFIG_LIBDIR=${PKG_CONFIG_SYSROOT_DIR}/usr/lib64/pkgconfig
-```
-
-and running `pkg-config` again we get
-
-```
-$ pkg-config --cflags gtest
--DGTEST_HAS_PTHREAD=1 -lpthread -I/home/MYUSER/sysroot/usr/include
-$ pkg-config --libs gtest
--L/home/MYUSER/sysroot/usr/lib64 -lgtest -lpthread
-```
-
-which contains the correct sysroot now. For a more comprehensive guide to also
-including `${CHOST}` in build system calls, see the excellent tutorial by Diego
-Elio Pettenò: <https://autotools.io/pkgconfig/cross-compiling.html>
diff --git a/third_party/googletest/docs/platforms.md b/third_party/googletest/docs/platforms.md
deleted file mode 100644
index eba6ef8..0000000
--- a/third_party/googletest/docs/platforms.md
+++ /dev/null
@@ -1,35 +0,0 @@
-# Supported Platforms
-
-GoogleTest requires a codebase and compiler compliant with the C++11 standard or
-newer.
-
-The GoogleTest code is officially supported on the following platforms.
-Operating systems or tools not listed below are community-supported. For
-community-supported platforms, patches that do not complicate the code may be
-considered.
-
-If you notice any problems on your platform, please file an issue on the
-[GoogleTest GitHub Issue Tracker](https://github.com/google/googletest/issues).
-Pull requests containing fixes are welcome!
-
-### Operating systems
-
-*   Linux
-*   macOS
-*   Windows
-
-### Compilers
-
-*   gcc 5.0+
-*   clang 5.0+
-*   MSVC 2015+
-
-**macOS users:** Xcode 9.3+ provides clang 5.0+.
-
-### Build systems
-
-*   [Bazel](https://bazel.build/)
-*   [CMake](https://cmake.org/)
-
-Bazel is the build system used by the team internally and in tests. CMake is
-supported on a best-effort basis and by the community.
diff --git a/third_party/googletest/docs/primer.md b/third_party/googletest/docs/primer.md
deleted file mode 100644
index 44a1cb5..0000000
--- a/third_party/googletest/docs/primer.md
+++ /dev/null
@@ -1,578 +0,0 @@
-# Googletest Primer
-
-## Introduction: Why googletest?
-
-*googletest* helps you write better C++ tests.
-
-googletest is a testing framework developed by the Testing Technology team with
-Google's specific requirements and constraints in mind. Whether you work on
-Linux, Windows, or a Mac, if you write C++ code, googletest can help you. And it
-supports *any* kind of tests, not just unit tests.
-
-So what makes a good test, and how does googletest fit in? We believe:
-
-1.  Tests should be *independent* and *repeatable*. It's a pain to debug a test
-    that succeeds or fails as a result of other tests. googletest isolates the
-    tests by running each of them on a different object. When a test fails,
-    googletest allows you to run it in isolation for quick debugging.
-2.  Tests should be well *organized* and reflect the structure of the tested
-    code. googletest groups related tests into test suites that can share data
-    and subroutines. This common pattern is easy to recognize and makes tests
-    easy to maintain. Such consistency is especially helpful when people switch
-    projects and start to work on a new code base.
-3.  Tests should be *portable* and *reusable*. Google has a lot of code that is
-    platform-neutral; its tests should also be platform-neutral. googletest
-    works on different OSes, with different compilers, with or without
-    exceptions, so googletest tests can work with a variety of configurations.
-4.  When tests fail, they should provide as much *information* about the problem
-    as possible. googletest doesn't stop at the first test failure. Instead, it
-    only stops the current test and continues with the next. You can also set up
-    tests that report non-fatal failures after which the current test continues.
-    Thus, you can detect and fix multiple bugs in a single run-edit-compile
-    cycle.
-5.  The testing framework should liberate test writers from housekeeping chores
-    and let them focus on the test *content*. googletest automatically keeps
-    track of all tests defined, and doesn't require the user to enumerate them
-    in order to run them.
-6.  Tests should be *fast*. With googletest, you can reuse shared resources
-    across tests and pay for the set-up/tear-down only once, without making
-    tests depend on each other.
-
-Since googletest is based on the popular xUnit architecture, you'll feel right
-at home if you've used JUnit or PyUnit before. If not, it will take you about 10
-minutes to learn the basics and get started. So let's go!
-
-## Beware of the nomenclature
-
-{: .callout .note}
-_Note:_ There might be some confusion arising from different definitions of the
-terms _Test_, _Test Case_ and _Test Suite_, so beware of misunderstanding these.
-
-Historically, googletest started to use the term _Test Case_ for grouping
-related tests, whereas current publications, including International Software
-Testing Qualifications Board ([ISTQB](http://www.istqb.org/)) materials and
-various textbooks on software quality, use the term
-_[Test Suite][istqb test suite]_ for this.
-
-The related term _Test_, as it is used in googletest, corresponds to the term
-_[Test Case][istqb test case]_ of ISTQB and others.
-
-The term _Test_ is commonly of broad enough sense, including ISTQB's definition
-of _Test Case_, so it's not much of a problem here. But the term _Test Case_ as
-was used in Google Test is of contradictory sense and thus confusing.
-
-googletest recently started replacing the term _Test Case_ with _Test Suite_.
-The preferred API is *TestSuite*. The older TestCase API is being slowly
-deprecated and refactored away.
-
-So please be aware of the different definitions of the terms:
-
-
-Meaning                                                                              | googletest Term         | [ISTQB](http://www.istqb.org/) Term
-:----------------------------------------------------------------------------------- | :---------------------- | :----------------------------------
-Exercise a particular program path with specific input values and verify the results | [TEST()](#simple-tests) | [Test Case][istqb test case]
-
-
-[istqb test case]: http://glossary.istqb.org/en/search/test%20case
-[istqb test suite]: http://glossary.istqb.org/en/search/test%20suite
-
-## Basic Concepts
-
-When using googletest, you start by writing *assertions*, which are statements
-that check whether a condition is true. An assertion's result can be *success*,
-*nonfatal failure*, or *fatal failure*. If a fatal failure occurs, it aborts the
-current function; otherwise the program continues normally.
-
-*Tests* use assertions to verify the tested code's behavior. If a test crashes
-or has a failed assertion, then it *fails*; otherwise it *succeeds*.
-
-A *test suite* contains one or many tests. You should group your tests into test
-suites that reflect the structure of the tested code. When multiple tests in a
-test suite need to share common objects and subroutines, you can put them into a
-*test fixture* class.
-
-A *test program* can contain multiple test suites.
-
-We'll now explain how to write a test program, starting at the individual
-assertion level and building up to tests and test suites.
-
-## Assertions
-
-googletest assertions are macros that resemble function calls. You test a class
-or function by making assertions about its behavior. When an assertion fails,
-googletest prints the assertion's source file and line number location, along
-with a failure message. You may also supply a custom failure message which will
-be appended to googletest's message.
-
-The assertions come in pairs that test the same thing but have different effects
-on the current function. `ASSERT_*` versions generate fatal failures when they
-fail, and **abort the current function**. `EXPECT_*` versions generate nonfatal
-failures, which don't abort the current function. Usually `EXPECT_*` are
-preferred, as they allow more than one failure to be reported in a test.
-However, you should use `ASSERT_*` if it doesn't make sense to continue when the
-assertion in question fails.
-
-Since a failed `ASSERT_*` returns from the current function immediately,
-possibly skipping clean-up code that comes after it, it may cause a space leak.
-Depending on the nature of the leak, it may or may not be worth fixing - so keep
-this in mind if you get a heap checker error in addition to assertion errors.
-
-To provide a custom failure message, simply stream it into the macro using the
-`<<` operator or a sequence of such operators. An example:
-
-```c++
-ASSERT_EQ(x.size(), y.size()) << "Vectors x and y are of unequal length";
-
-for (int i = 0; i < x.size(); ++i) {
-  EXPECT_EQ(x[i], y[i]) << "Vectors x and y differ at index " << i;
-}
-```
-
-Anything that can be streamed to an `ostream` can be streamed to an assertion
-macro--in particular, C strings and `string` objects. If a wide string
-(`wchar_t*`, `TCHAR*` in `UNICODE` mode on Windows, or `std::wstring`) is
-streamed to an assertion, it will be translated to UTF-8 when printed.
-
-### Basic Assertions
-
-These assertions do basic true/false condition testing.
-
-Fatal assertion            | Nonfatal assertion         | Verifies
--------------------------- | -------------------------- | --------------------
-`ASSERT_TRUE(condition);`  | `EXPECT_TRUE(condition);`  | `condition` is true
-`ASSERT_FALSE(condition);` | `EXPECT_FALSE(condition);` | `condition` is false
-
-Remember, when they fail, `ASSERT_*` yields a fatal failure and returns from the
-current function, while `EXPECT_*` yields a nonfatal failure, allowing the
-function to continue running. In either case, an assertion failure means its
-containing test fails.
-
-**Availability**: Linux, Windows, Mac.
-
-### Binary Comparison
-
-This section describes assertions that compare two values.
-
-Fatal assertion          | Nonfatal assertion       | Verifies
------------------------- | ------------------------ | --------------
-`ASSERT_EQ(val1, val2);` | `EXPECT_EQ(val1, val2);` | `val1 == val2`
-`ASSERT_NE(val1, val2);` | `EXPECT_NE(val1, val2);` | `val1 != val2`
-`ASSERT_LT(val1, val2);` | `EXPECT_LT(val1, val2);` | `val1 < val2`
-`ASSERT_LE(val1, val2);` | `EXPECT_LE(val1, val2);` | `val1 <= val2`
-`ASSERT_GT(val1, val2);` | `EXPECT_GT(val1, val2);` | `val1 > val2`
-`ASSERT_GE(val1, val2);` | `EXPECT_GE(val1, val2);` | `val1 >= val2`
-
-Value arguments must be comparable by the assertion's comparison operator or
-you'll get a compiler error. We used to require the arguments to support the
-`<<` operator for streaming to an `ostream`, but this is no longer necessary. If
-`<<` is supported, it will be called to print the arguments when the assertion
-fails; otherwise googletest will attempt to print them in the best way it can.
-For more details and how to customize the printing of the arguments, see the
-[documentation](./advanced.md#teaching-googletest-how-to-print-your-values).
-
-These assertions can work with a user-defined type, but only if you define the
-corresponding comparison operator (e.g., `==` or `<`). Since this is discouraged
-by the Google
-[C++ Style Guide](https://google.github.io/styleguide/cppguide.html#Operator_Overloading),
-you may need to use `ASSERT_TRUE()` or `EXPECT_TRUE()` to assert the equality of
-two objects of a user-defined type.
-
-However, when possible, `ASSERT_EQ(actual, expected)` is preferred to
-`ASSERT_TRUE(actual == expected)`, since it tells you `actual` and `expected`'s
-values on failure.
-
-Arguments are always evaluated exactly once. Therefore, it's OK for the
-arguments to have side effects. However, as with any ordinary C/C++ function,
-the arguments' evaluation order is undefined (i.e., the compiler is free to
-choose any order), and your code should not depend on any particular argument
-evaluation order.
-
-`ASSERT_EQ()` does pointer equality on pointers. If used on two C strings, it
-tests if they are in the same memory location, not if they have the same value.
-Therefore, if you want to compare C strings (e.g. `const char*`) by value, use
-`ASSERT_STREQ()`, which will be described later on. In particular, to assert
-that a C string is `NULL`, use `ASSERT_STREQ(c_string, NULL)`. Consider using
-`ASSERT_EQ(c_string, nullptr)` if c++11 is supported. To compare two `string`
-objects, you should use `ASSERT_EQ`.
-
-When doing pointer comparisons use `*_EQ(ptr, nullptr)` and `*_NE(ptr, nullptr)`
-instead of `*_EQ(ptr, NULL)` and `*_NE(ptr, NULL)`. This is because `nullptr` is
-typed, while `NULL` is not. See the [FAQ](faq.md) for more details.
-
-If you're working with floating point numbers, you may want to use the floating
-point variations of some of these macros in order to avoid problems caused by
-rounding. See [Advanced googletest Topics](advanced.md) for details.
-
-Macros in this section work with both narrow and wide string objects (`string`
-and `wstring`).
-
-**Availability**: Linux, Windows, Mac.
-
-**Historical note**: Before February 2016 `*_EQ` had a convention of calling it
-as `ASSERT_EQ(expected, actual)`, so lots of existing code uses this order. Now
-`*_EQ` treats both parameters in the same way.
-
-### String Comparison
-
-The assertions in this group compare two **C strings**. If you want to compare
-two `string` objects, use `EXPECT_EQ`, `EXPECT_NE`, and etc instead.
-
-
-| Fatal assertion                | Nonfatal assertion             | Verifies                                                 |
-| --------------------------     | ------------------------------ | -------------------------------------------------------- |
-| `ASSERT_STREQ(str1,str2);`     | `EXPECT_STREQ(str1,str2);`     | the two C strings have the same content   		     |
-| `ASSERT_STRNE(str1,str2);`     | `EXPECT_STRNE(str1,str2);`     | the two C strings have different contents 		     |
-| `ASSERT_STRCASEEQ(str1,str2);` | `EXPECT_STRCASEEQ(str1,str2);` | the two C strings have the same content, ignoring case   |
-| `ASSERT_STRCASENE(str1,str2);` | `EXPECT_STRCASENE(str1,str2);` | the two C strings have different contents, ignoring case |
-
-
-Note that "CASE" in an assertion name means that case is ignored. A `NULL`
-pointer and an empty string are considered *different*.
-
-`*STREQ*` and `*STRNE*` also accept wide C strings (`wchar_t*`). If a comparison
-of two wide strings fails, their values will be printed as UTF-8 narrow strings.
-
-**Availability**: Linux, Windows, Mac.
-
-**See also**: For more string comparison tricks (substring, prefix, suffix, and
-regular expression matching, for example), see [this](advanced.md) in the
-Advanced googletest Guide.
-
-## Simple Tests
-
-To create a test:
-
-1.  Use the `TEST()` macro to define and name a test function. These are
-    ordinary C++ functions that don't return a value.
-2.  In this function, along with any valid C++ statements you want to include,
-    use the various googletest assertions to check values.
-3.  The test's result is determined by the assertions; if any assertion in the
-    test fails (either fatally or non-fatally), or if the test crashes, the
-    entire test fails. Otherwise, it succeeds.
-
-```c++
-TEST(TestSuiteName, TestName) {
-  ... test body ...
-}
-```
-
-`TEST()` arguments go from general to specific. The *first* argument is the name
-of the test suite, and the *second* argument is the test's name within the test
-suite. Both names must be valid C++ identifiers, and they should not contain
-any underscores (`_`). A test's *full name* consists of its containing test suite and
-its individual name. Tests from different test suites can have the same
-individual name.
-
-For example, let's take a simple integer function:
-
-```c++
-int Factorial(int n);  // Returns the factorial of n
-```
-
-A test suite for this function might look like:
-
-```c++
-// Tests factorial of 0.
-TEST(FactorialTest, HandlesZeroInput) {
-  EXPECT_EQ(Factorial(0), 1);
-}
-
-// Tests factorial of positive numbers.
-TEST(FactorialTest, HandlesPositiveInput) {
-  EXPECT_EQ(Factorial(1), 1);
-  EXPECT_EQ(Factorial(2), 2);
-  EXPECT_EQ(Factorial(3), 6);
-  EXPECT_EQ(Factorial(8), 40320);
-}
-```
-
-googletest groups the test results by test suites, so logically related tests
-should be in the same test suite; in other words, the first argument to their
-`TEST()` should be the same. In the above example, we have two tests,
-`HandlesZeroInput` and `HandlesPositiveInput`, that belong to the same test
-suite `FactorialTest`.
-
-When naming your test suites and tests, you should follow the same convention as
-for
-[naming functions and classes](https://google.github.io/styleguide/cppguide.html#Function_Names).
-
-**Availability**: Linux, Windows, Mac.
-
-## Test Fixtures: Using the Same Data Configuration for Multiple Tests {#same-data-multiple-tests}
-
-If you find yourself writing two or more tests that operate on similar data, you
-can use a *test fixture*. This allows you to reuse the same configuration of
-objects for several different tests.
-
-To create a fixture:
-
-1.  Derive a class from `::testing::Test` . Start its body with `protected:`, as
-    we'll want to access fixture members from sub-classes.
-2.  Inside the class, declare any objects you plan to use.
-3.  If necessary, write a default constructor or `SetUp()` function to prepare
-    the objects for each test. A common mistake is to spell `SetUp()` as
-    **`Setup()`** with a small `u` - Use `override` in C++11 to make sure you
-    spelled it correctly.
-4.  If necessary, write a destructor or `TearDown()` function to release any
-    resources you allocated in `SetUp()` . To learn when you should use the
-    constructor/destructor and when you should use `SetUp()/TearDown()`, read
-    the [FAQ](faq.md#CtorVsSetUp).
-5.  If needed, define subroutines for your tests to share.
-
-When using a fixture, use `TEST_F()` instead of `TEST()` as it allows you to
-access objects and subroutines in the test fixture:
-
-```c++
-TEST_F(TestFixtureName, TestName) {
-  ... test body ...
-}
-```
-
-Like `TEST()`, the first argument is the test suite name, but for `TEST_F()`
-this must be the name of the test fixture class. You've probably guessed: `_F`
-is for fixture.
-
-Unfortunately, the C++ macro system does not allow us to create a single macro
-that can handle both types of tests. Using the wrong macro causes a compiler
-error.
-
-Also, you must first define a test fixture class before using it in a
-`TEST_F()`, or you'll get the compiler error "`virtual outside class
-declaration`".
-
-For each test defined with `TEST_F()`, googletest will create a *fresh* test
-fixture at runtime, immediately initialize it via `SetUp()`, run the test,
-clean up by calling `TearDown()`, and then delete the test fixture. Note that
-different tests in the same test suite have different test fixture objects, and
-googletest always deletes a test fixture before it creates the next one.
-googletest does **not** reuse the same test fixture for multiple tests. Any
-changes one test makes to the fixture do not affect other tests.
-
-As an example, let's write tests for a FIFO queue class named `Queue`, which has
-the following interface:
-
-```c++
-template <typename E>  // E is the element type.
-class Queue {
- public:
-  Queue();
-  void Enqueue(const E& element);
-  E* Dequeue();  // Returns NULL if the queue is empty.
-  size_t size() const;
-  ...
-};
-```
-
-First, define a fixture class. By convention, you should give it the name
-`FooTest` where `Foo` is the class being tested.
-
-```c++
-class QueueTest : public ::testing::Test {
- protected:
-  void SetUp() override {
-     q1_.Enqueue(1);
-     q2_.Enqueue(2);
-     q2_.Enqueue(3);
-  }
-
-  // void TearDown() override {}
-
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-```
-
-In this case, `TearDown()` is not needed since we don't have to clean up after
-each test, other than what's already done by the destructor.
-
-Now we'll write tests using `TEST_F()` and this fixture.
-
-```c++
-TEST_F(QueueTest, IsEmptyInitially) {
-  EXPECT_EQ(q0_.size(), 0);
-}
-
-TEST_F(QueueTest, DequeueWorks) {
-  int* n = q0_.Dequeue();
-  EXPECT_EQ(n, nullptr);
-
-  n = q1_.Dequeue();
-  ASSERT_NE(n, nullptr);
-  EXPECT_EQ(*n, 1);
-  EXPECT_EQ(q1_.size(), 0);
-  delete n;
-
-  n = q2_.Dequeue();
-  ASSERT_NE(n, nullptr);
-  EXPECT_EQ(*n, 2);
-  EXPECT_EQ(q2_.size(), 1);
-  delete n;
-}
-```
-
-The above uses both `ASSERT_*` and `EXPECT_*` assertions. The rule of thumb is
-to use `EXPECT_*` when you want the test to continue to reveal more errors after
-the assertion failure, and use `ASSERT_*` when continuing after failure doesn't
-make sense. For example, the second assertion in the `Dequeue` test is
-`ASSERT_NE(nullptr, n)`, as we need to dereference the pointer `n` later, which
-would lead to a segfault when `n` is `NULL`.
-
-When these tests run, the following happens:
-
-1.  googletest constructs a `QueueTest` object (let's call it `t1`).
-2.  `t1.SetUp()` initializes `t1`.
-3.  The first test (`IsEmptyInitially`) runs on `t1`.
-4.  `t1.TearDown()` cleans up after the test finishes.
-5.  `t1` is destructed.
-6.  The above steps are repeated on another `QueueTest` object, this time
-    running the `DequeueWorks` test.
-
-**Availability**: Linux, Windows, Mac.
-
-## Invoking the Tests
-
-`TEST()` and `TEST_F()` implicitly register their tests with googletest. So,
-unlike with many other C++ testing frameworks, you don't have to re-list all
-your defined tests in order to run them.
-
-After defining your tests, you can run them with `RUN_ALL_TESTS()`, which
-returns `0` if all the tests are successful, or `1` otherwise. Note that
-`RUN_ALL_TESTS()` runs *all tests* in your link unit--they can be from
-different test suites, or even different source files.
-
-When invoked, the `RUN_ALL_TESTS()` macro:
-
-*   Saves the state of all googletest flags.
-
-*   Creates a test fixture object for the first test.
-
-*   Initializes it via `SetUp()`.
-
-*   Runs the test on the fixture object.
-
-*   Cleans up the fixture via `TearDown()`.
-
-*   Deletes the fixture.
-
-*   Restores the state of all googletest flags.
-
-*   Repeats the above steps for the next test, until all tests have run.
-
-If a fatal failure happens the subsequent steps will be skipped.
-
-{: .callout .important}
-> IMPORTANT: You must **not** ignore the return value of `RUN_ALL_TESTS()`, or
-> you will get a compiler error. The rationale for this design is that the
-> automated testing service determines whether a test has passed based on its
-> exit code, not on its stdout/stderr output; thus your `main()` function must
-> return the value of `RUN_ALL_TESTS()`.
->
-> Also, you should call `RUN_ALL_TESTS()` only **once**. Calling it more than
-> once conflicts with some advanced googletest features (e.g., thread-safe
-> [death tests](advanced.md#death-tests)) and thus is not supported.
-
-**Availability**: Linux, Windows, Mac.
-
-## Writing the main() Function
-
-Most users should _not_ need to write their own `main` function and instead link
-with `gtest_main` (as opposed to with `gtest`), which defines a suitable entry
-point. See the end of this section for details. The remainder of this section
-should only apply when you need to do something custom before the tests run that
-cannot be expressed within the framework of fixtures and test suites.
-
-If you write your own `main` function, it should return the value of
-`RUN_ALL_TESTS()`.
-
-You can start from this boilerplate:
-
-```c++
-#include "this/package/foo.h"
-
-#include "gtest/gtest.h"
-
-namespace my {
-namespace project {
-namespace {
-
-// The fixture for testing class Foo.
-class FooTest : public ::testing::Test {
- protected:
-  // You can remove any or all of the following functions if their bodies would
-  // be empty.
-
-  FooTest() {
-     // You can do set-up work for each test here.
-  }
-
-  ~FooTest() override {
-     // You can do clean-up work that doesn't throw exceptions here.
-  }
-
-  // If the constructor and destructor are not enough for setting up
-  // and cleaning up each test, you can define the following methods:
-
-  void SetUp() override {
-     // Code here will be called immediately after the constructor (right
-     // before each test).
-  }
-
-  void TearDown() override {
-     // Code here will be called immediately after each test (right
-     // before the destructor).
-  }
-
-  // Class members declared here can be used by all tests in the test suite
-  // for Foo.
-};
-
-// Tests that the Foo::Bar() method does Abc.
-TEST_F(FooTest, MethodBarDoesAbc) {
-  const std::string input_filepath = "this/package/testdata/myinputfile.dat";
-  const std::string output_filepath = "this/package/testdata/myoutputfile.dat";
-  Foo f;
-  EXPECT_EQ(f.Bar(input_filepath, output_filepath), 0);
-}
-
-// Tests that Foo does Xyz.
-TEST_F(FooTest, DoesXyz) {
-  // Exercises the Xyz feature of Foo.
-}
-
-}  // namespace
-}  // namespace project
-}  // namespace my
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-```
-
-The `::testing::InitGoogleTest()` function parses the command line for
-googletest flags, and removes all recognized flags. This allows the user to
-control a test program's behavior via various flags, which we'll cover in
-the [AdvancedGuide](advanced.md). You **must** call this function before calling
-`RUN_ALL_TESTS()`, or the flags won't be properly initialized.
-
-On Windows, `InitGoogleTest()` also works with wide strings, so it can be used
-in programs compiled in `UNICODE` mode as well.
-
-But maybe you think that writing all those `main` functions is too much work? We
-agree with you completely, and that's why Google Test provides a basic
-implementation of main(). If it fits your needs, then just link your test with
-the `gtest_main` library and you are good to go.
-
-{: .callout .note}
-NOTE: `ParseGUnitFlags()` is deprecated in favor of `InitGoogleTest()`.
-
-## Known Limitations
-
-*   Google Test is designed to be thread-safe. The implementation is thread-safe
-    on systems where the `pthreads` library is available. It is currently
-    _unsafe_ to use Google Test assertions from two threads concurrently on
-    other systems (e.g. Windows). In most tests this is not an issue as usually
-    the assertions are done in the main thread. If you want to help, you can
-    volunteer to implement the necessary synchronization primitives in
-    `gtest-port.h` for your platform.
diff --git a/third_party/googletest/docs/quickstart-bazel.md b/third_party/googletest/docs/quickstart-bazel.md
deleted file mode 100644
index 362ee6d..0000000
--- a/third_party/googletest/docs/quickstart-bazel.md
+++ /dev/null
@@ -1,161 +0,0 @@
-# Quickstart: Building with Bazel
-
-This tutorial aims to get you up and running with GoogleTest using the Bazel
-build system. If you're using GoogleTest for the first time or need a refresher,
-we recommend this tutorial as a starting point.
-
-## Prerequisites
-
-To complete this tutorial, you'll need:
-
-*   A compatible operating system (e.g. Linux, macOS, Windows).
-*   A compatible C++ compiler that supports at least C++11.
-*   [Bazel](https://bazel.build/), the preferred build system used by the
-    GoogleTest team.
-
-See [Supported Platforms](platforms.md) for more information about platforms
-compatible with GoogleTest.
-
-If you don't already have Bazel installed, see the
-[Bazel installation guide](https://docs.bazel.build/versions/master/install.html).
-
-{: .callout .note}
-Note: The terminal commands in this tutorial show a Unix shell prompt, but the
-commands work on the Windows command line as well.
-
-## Set up a Bazel workspace
-
-A
-[Bazel workspace](https://docs.bazel.build/versions/master/build-ref.html#workspace)
-is a directory on your filesystem that you use to manage source files for the
-software you want to build. Each workspace directory has a text file named
-`WORKSPACE` which may be empty, or may contain references to external
-dependencies required to build the outputs.
-
-First, create a directory for your workspace:
-
-```
-$ mkdir my_workspace && cd my_workspace
-```
-
-Next, you’ll create the `WORKSPACE` file to specify dependencies. A common and
-recommended way to depend on GoogleTest is to use a
-[Bazel external dependency](https://docs.bazel.build/versions/master/external.html)
-via the
-[`http_archive` rule](https://docs.bazel.build/versions/master/repo/http.html#http_archive).
-To do this, in the root directory of your workspace (`my_workspace/`), create a
-file named `WORKSPACE` with the following contents:
-
-```
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-  name = "com_google_googletest",
-  urls = ["https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip"],
-  strip_prefix = "googletest-609281088cfefc76f9d0ce82e1ff6c30cc3591e5",
-)
-```
-
-The above configuration declares a dependency on GoogleTest which is downloaded
-as a ZIP archive from GitHub. In the above example,
-`609281088cfefc76f9d0ce82e1ff6c30cc3591e5` is the Git commit hash of the
-GoogleTest version to use; we recommend updating the hash often to point to the
-latest version.
-
-Bazel also needs a dependency on the
-[`rules_cc` repository](https://github.com/bazelbuild/rules_cc) to build C++
-code, so add the following to the `WORKSPACE` file:
-
-```
-http_archive(
-  name = "rules_cc",
-  urls = ["https://github.com/bazelbuild/rules_cc/archive/40548a2974f1aea06215272d9c2b47a14a24e556.zip"],
-  strip_prefix = "rules_cc-40548a2974f1aea06215272d9c2b47a14a24e556",
-)
-```
-
-Now you're ready to build C++ code that uses GoogleTest.
-
-## Create and run a binary
-
-With your Bazel workspace set up, you can now use GoogleTest code within your
-own project.
-
-As an example, create a file named `hello_test.cc` in your `my_workspace`
-directory with the following contents:
-
-```cpp
-#include <gtest/gtest.h>
-
-// Demonstrate some basic assertions.
-TEST(HelloTest, BasicAssertions) {
-  // Expect two strings not to be equal.
-  EXPECT_STRNE("hello", "world");
-  // Expect equality.
-  EXPECT_EQ(7 * 6, 42);
-}
-```
-
-GoogleTest provides [assertions](primer.md#assertions) that you use to test the
-behavior of your code. The above sample includes the main GoogleTest header file
-and demonstrates some basic assertions.
-
-To build the code, create a file named `BUILD` in the same directory with the
-following contents:
-
-```
-load("@rules_cc//cc:defs.bzl", "cc_test")
-
-cc_test(
-  name = "hello_test",
-  size = "small",
-  srcs = ["hello_test.cc"],
-  deps = ["@com_google_googletest//:gtest_main"],
-)
-```
-
-This `cc_test` rule declares the C++ test binary you want to build, and links to
-GoogleTest (`//:gtest_main`) using the prefix you specified in the `WORKSPACE`
-file (`@com_google_googletest`). For more information about Bazel `BUILD` files,
-see the
-[Bazel C++ Tutorial](https://docs.bazel.build/versions/master/tutorial/cpp.html).
-
-Now you can build and run your test:
-
-<pre>
-<strong>my_workspace$ bazel test --test_output=all //:hello_test</strong>
-INFO: Analyzed target //:hello_test (26 packages loaded, 362 targets configured).
-INFO: Found 1 test target...
-INFO: From Testing //:hello_test:
-==================== Test output for //:hello_test:
-Running main() from gmock_main.cc
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from HelloTest
-[ RUN      ] HelloTest.BasicAssertions
-[       OK ] HelloTest.BasicAssertions (0 ms)
-[----------] 1 test from HelloTest (0 ms total)
-
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran. (0 ms total)
-[  PASSED  ] 1 test.
-================================================================================
-Target //:hello_test up-to-date:
-  bazel-bin/hello_test
-INFO: Elapsed time: 4.190s, Critical Path: 3.05s
-INFO: 27 processes: 8 internal, 19 linux-sandbox.
-INFO: Build completed successfully, 27 total actions
-//:hello_test                                                     PASSED in 0.1s
-
-INFO: Build completed successfully, 27 total actions
-</pre>
-
-Congratulations! You've successfully built and run a test binary using
-GoogleTest.
-
-## Next steps
-
-*   [Check out the Primer](primer.md) to start learning how to write simple
-    tests.
-*   [See the code samples](samples.md) for more examples showing how to use a
-    variety of GoogleTest features.
diff --git a/third_party/googletest/docs/quickstart-cmake.md b/third_party/googletest/docs/quickstart-cmake.md
deleted file mode 100644
index 420f1d3..0000000
--- a/third_party/googletest/docs/quickstart-cmake.md
+++ /dev/null
@@ -1,156 +0,0 @@
-# Quickstart: Building with CMake
-
-This tutorial aims to get you up and running with GoogleTest using CMake. If
-you're using GoogleTest for the first time or need a refresher, we recommend
-this tutorial as a starting point. If your project uses Bazel, see the
-[Quickstart for Bazel](quickstart-bazel.md) instead.
-
-## Prerequisites
-
-To complete this tutorial, you'll need:
-
-*   A compatible operating system (e.g. Linux, macOS, Windows).
-*   A compatible C++ compiler that supports at least C++11.
-*   [CMake](https://cmake.org/) and a compatible build tool for building the
-    project.
-    *   Compatible build tools include
-        [Make](https://www.gnu.org/software/make/),
-        [Ninja](https://ninja-build.org/), and others - see
-        [CMake Generators](https://cmake.org/cmake/help/latest/manual/cmake-generators.7.html)
-        for more information.
-
-See [Supported Platforms](platforms.md) for more information about platforms
-compatible with GoogleTest.
-
-If you don't already have CMake installed, see the
-[CMake installation guide](https://cmake.org/install).
-
-{: .callout .note}
-Note: The terminal commands in this tutorial show a Unix shell prompt, but the
-commands work on the Windows command line as well.
-
-## Set up a project
-
-CMake uses a file named `CMakeLists.txt` to configure the build system for a
-project. You'll use this file to set up your project and declare a dependency on
-GoogleTest.
-
-First, create a directory for your project:
-
-```
-$ mkdir my_project && cd my_project
-```
-
-Next, you'll create the `CMakeLists.txt` file and declare a dependency on
-GoogleTest. There are many ways to express dependencies in the CMake ecosystem;
-in this quickstart, you'll use the
-[`FetchContent` CMake module](https://cmake.org/cmake/help/latest/module/FetchContent.html).
-To do this, in your project directory (`my_project`), create a file named
-`CMakeLists.txt` with the following contents:
-
-```cmake
-cmake_minimum_required(VERSION 3.14)
-project(my_project)
-
-# GoogleTest requires at least C++11
-set(CMAKE_CXX_STANDARD 11)
-
-include(FetchContent)
-FetchContent_Declare(
-  googletest
-  URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
-)
-# For Windows: Prevent overriding the parent project's compiler/linker settings
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-FetchContent_MakeAvailable(googletest)
-```
-
-The above configuration declares a dependency on GoogleTest which is downloaded
-from GitHub. In the above example, `609281088cfefc76f9d0ce82e1ff6c30cc3591e5` is
-the Git commit hash of the GoogleTest version to use; we recommend updating the
-hash often to point to the latest version.
-
-For more information about how to create `CMakeLists.txt` files, see the
-[CMake Tutorial](https://cmake.org/cmake/help/latest/guide/tutorial/index.html).
-
-## Create and run a binary
-
-With GoogleTest declared as a dependency, you can use GoogleTest code within
-your own project.
-
-As an example, create a file named `hello_test.cc` in your `my_project`
-directory with the following contents:
-
-```cpp
-#include <gtest/gtest.h>
-
-// Demonstrate some basic assertions.
-TEST(HelloTest, BasicAssertions) {
-  // Expect two strings not to be equal.
-  EXPECT_STRNE("hello", "world");
-  // Expect equality.
-  EXPECT_EQ(7 * 6, 42);
-}
-```
-
-GoogleTest provides [assertions](primer.md#assertions) that you use to test the
-behavior of your code. The above sample includes the main GoogleTest header file
-and demonstrates some basic assertions.
-
-To build the code, add the following to the end of your `CMakeLists.txt` file:
-
-```cmake
-enable_testing()
-
-add_executable(
-  hello_test
-  hello_test.cc
-)
-target_link_libraries(
-  hello_test
-  gtest_main
-)
-
-include(GoogleTest)
-gtest_discover_tests(hello_test)
-```
-
-The above configuration enables testing in CMake, declares the C++ test binary
-you want to build (`hello_test`), and links it to GoogleTest (`gtest_main`). The
-last two lines enable CMake's test runner to discover the tests included in the
-binary, using the
-[`GoogleTest` CMake module](https://cmake.org/cmake/help/git-stage/module/GoogleTest.html).
-
-Now you can build and run your test:
-
-<pre>
-<strong>my_project$ cmake -S . -B build</strong>
--- The C compiler identification is GNU 10.2.1
--- The CXX compiler identification is GNU 10.2.1
-...
--- Build files have been written to: .../my_project/build
-
-<strong>my_project$ cmake --build build</strong>
-Scanning dependencies of target gtest
-...
-[100%] Built target gmock_main
-
-<strong>my_project$ cd build && ctest</strong>
-Test project .../my_project/build
-    Start 1: HelloTest.BasicAssertions
-1/1 Test #1: HelloTest.BasicAssertions ........   Passed    0.00 sec
-
-100% tests passed, 0 tests failed out of 1
-
-Total Test time (real) =   0.01 sec
-</pre>
-
-Congratulations! You've successfully built and run a test binary using
-GoogleTest.
-
-## Next steps
-
-*   [Check out the Primer](primer.md) to start learning how to write simple
-    tests.
-*   [See the code samples](samples.md) for more examples showing how to use a
-    variety of GoogleTest features.
diff --git a/third_party/googletest/docs/reference/matchers.md b/third_party/googletest/docs/reference/matchers.md
deleted file mode 100644
index a2ded43..0000000
--- a/third_party/googletest/docs/reference/matchers.md
+++ /dev/null
@@ -1,282 +0,0 @@
-# Matchers Reference
-
-A **matcher** matches a *single* argument. You can use it inside `ON_CALL()` or
-`EXPECT_CALL()`, or use it to validate a value directly using two macros:
-
-| Macro                                | Description                           |
-| :----------------------------------- | :------------------------------------ |
-| `EXPECT_THAT(actual_value, matcher)` | Asserts that `actual_value` matches `matcher`. |
-| `ASSERT_THAT(actual_value, matcher)` | The same as `EXPECT_THAT(actual_value, matcher)`, except that it generates a **fatal** failure. |
-
-{: .callout .note}
-**Note:** Although equality matching via `EXPECT_THAT(actual_value,
-expected_value)` is supported, prefer to make the comparison explicit via
-`EXPECT_THAT(actual_value, Eq(expected_value))` or `EXPECT_EQ(actual_value,
-expected_value)`.
-
-Built-in matchers (where `argument` is the function argument, e.g.
-`actual_value` in the example above, or when used in the context of
-`EXPECT_CALL(mock_object, method(matchers))`, the arguments of `method`) are
-divided into several categories:
-
-### Wildcard
-
-Matcher                     | Description
-:-------------------------- | :-----------------------------------------------
-`_`                         | `argument` can be any value of the correct type.
-`A<type>()` or `An<type>()` | `argument` can be any value of type `type`.
-
-### Generic Comparison
-
-| Matcher                | Description                                         |
-| :--------------------- | :-------------------------------------------------- |
-| `Eq(value)` or `value` | `argument == value`                                 |
-| `Ge(value)`            | `argument >= value`                                 |
-| `Gt(value)`            | `argument > value`                                  |
-| `Le(value)`            | `argument <= value`                                 |
-| `Lt(value)`            | `argument < value`                                  |
-| `Ne(value)`            | `argument != value`                                 |
-| `IsFalse()`            | `argument` evaluates to `false` in a Boolean context. |
-| `IsTrue()`             | `argument` evaluates to `true` in a Boolean context. |
-| `IsNull()`             | `argument` is a `NULL` pointer (raw or smart).      |
-| `NotNull()`            | `argument` is a non-null pointer (raw or smart).    |
-| `Optional(m)`          | `argument` is `optional<>` that contains a value matching `m`. (For testing whether an `optional<>` is set, check for equality with `nullopt`. You may need to use `Eq(nullopt)` if the inner type doesn't have `==`.)|
-| `VariantWith<T>(m)`    | `argument` is `variant<>` that holds the alternative of type T with a value matching `m`. |
-| `Ref(variable)`        | `argument` is a reference to `variable`.            |
-| `TypedEq<type>(value)` | `argument` has type `type` and is equal to `value`. You may need to use this instead of `Eq(value)` when the mock function is overloaded. |
-
-Except `Ref()`, these matchers make a *copy* of `value` in case it's modified or
-destructed later. If the compiler complains that `value` doesn't have a public
-copy constructor, try wrap it in `std::ref()`, e.g.
-`Eq(std::ref(non_copyable_value))`. If you do that, make sure
-`non_copyable_value` is not changed afterwards, or the meaning of your matcher
-will be changed.
-
-`IsTrue` and `IsFalse` are useful when you need to use a matcher, or for types
-that can be explicitly converted to Boolean, but are not implicitly converted to
-Boolean. In other cases, you can use the basic
-[`EXPECT_TRUE` and `EXPECT_FALSE`](primer.md#basic-assertions) assertions.
-
-### Floating-Point Matchers {#FpMatchers}
-
-| Matcher                          | Description                        |
-| :------------------------------- | :--------------------------------- |
-| `DoubleEq(a_double)`             | `argument` is a `double` value approximately equal to `a_double`, treating two NaNs as unequal. |
-| `FloatEq(a_float)`               | `argument` is a `float` value approximately equal to `a_float`, treating two NaNs as unequal. |
-| `NanSensitiveDoubleEq(a_double)` | `argument` is a `double` value approximately equal to `a_double`, treating two NaNs as equal. |
-| `NanSensitiveFloatEq(a_float)`   | `argument` is a `float` value approximately equal to `a_float`, treating two NaNs as equal. |
-| `IsNan()`   | `argument` is any floating-point type with a NaN value. |
-
-The above matchers use ULP-based comparison (the same as used in googletest).
-They automatically pick a reasonable error bound based on the absolute value of
-the expected value. `DoubleEq()` and `FloatEq()` conform to the IEEE standard,
-which requires comparing two NaNs for equality to return false. The
-`NanSensitive*` version instead treats two NaNs as equal, which is often what a
-user wants.
-
-| Matcher                                           | Description              |
-| :------------------------------------------------ | :----------------------- |
-| `DoubleNear(a_double, max_abs_error)`             | `argument` is a `double` value close to `a_double` (absolute error <= `max_abs_error`), treating two NaNs as unequal. |
-| `FloatNear(a_float, max_abs_error)`               | `argument` is a `float` value close to `a_float` (absolute error <= `max_abs_error`), treating two NaNs as unequal. |
-| `NanSensitiveDoubleNear(a_double, max_abs_error)` | `argument` is a `double` value close to `a_double` (absolute error <= `max_abs_error`), treating two NaNs as equal. |
-| `NanSensitiveFloatNear(a_float, max_abs_error)`   | `argument` is a `float` value close to `a_float` (absolute error <= `max_abs_error`), treating two NaNs as equal. |
-
-### String Matchers
-
-The `argument` can be either a C string or a C++ string object:
-
-| Matcher                 | Description                                        |
-| :---------------------- | :------------------------------------------------- |
-| `ContainsRegex(string)` | `argument` matches the given regular expression.   |
-| `EndsWith(suffix)`      | `argument` ends with string `suffix`.              |
-| `HasSubstr(string)`     | `argument` contains `string` as a sub-string.      |
-| `IsEmpty()`             | `argument` is an empty string.                     |
-| `MatchesRegex(string)`  | `argument` matches the given regular expression with the match starting at the first character and ending at the last character. |
-| `StartsWith(prefix)`    | `argument` starts with string `prefix`.            |
-| `StrCaseEq(string)`     | `argument` is equal to `string`, ignoring case.    |
-| `StrCaseNe(string)`     | `argument` is not equal to `string`, ignoring case. |
-| `StrEq(string)`         | `argument` is equal to `string`.                   |
-| `StrNe(string)`         | `argument` is not equal to `string`.               |
-
-`ContainsRegex()` and `MatchesRegex()` take ownership of the `RE` object. They
-use the regular expression syntax defined
-[here](advanced.md#regular-expression-syntax). All of these matchers, except
-`ContainsRegex()` and `MatchesRegex()` work for wide strings as well.
-
-### Container Matchers
-
-Most STL-style containers support `==`, so you can use `Eq(expected_container)`
-or simply `expected_container` to match a container exactly. If you want to
-write the elements in-line, match them more flexibly, or get more informative
-messages, you can use:
-
-| Matcher                                   | Description                      |
-| :---------------------------------------- | :------------------------------- |
-| `BeginEndDistanceIs(m)` | `argument` is a container whose `begin()` and `end()` iterators are separated by a number of increments matching `m`. E.g. `BeginEndDistanceIs(2)` or `BeginEndDistanceIs(Lt(2))`. For containers that define a `size()` method, `SizeIs(m)` may be more efficient. |
-| `ContainerEq(container)` | The same as `Eq(container)` except that the failure message also includes which elements are in one container but not the other. |
-| `Contains(e)` | `argument` contains an element that matches `e`, which can be either a value or a matcher. |
-| `Each(e)` | `argument` is a container where *every* element matches `e`, which can be either a value or a matcher. |
-| `ElementsAre(e0, e1, ..., en)` | `argument` has `n + 1` elements, where the *i*-th element matches `ei`, which can be a value or a matcher. |
-| `ElementsAreArray({e0, e1, ..., en})`, `ElementsAreArray(a_container)`, `ElementsAreArray(begin, end)`, `ElementsAreArray(array)`, or `ElementsAreArray(array, count)` | The same as `ElementsAre()` except that the expected element values/matchers come from an initializer list, STL-style container, iterator range, or C-style array. |
-| `IsEmpty()` | `argument` is an empty container (`container.empty()`). |
-| `IsSubsetOf({e0, e1, ..., en})`, `IsSubsetOf(a_container)`, `IsSubsetOf(begin, end)`, `IsSubsetOf(array)`, or `IsSubsetOf(array, count)` | `argument` matches `UnorderedElementsAre(x0, x1, ..., xk)` for some subset `{x0, x1, ..., xk}` of the expected matchers. |
-| `IsSupersetOf({e0, e1, ..., en})`, `IsSupersetOf(a_container)`, `IsSupersetOf(begin, end)`, `IsSupersetOf(array)`, or `IsSupersetOf(array, count)` | Some subset of `argument` matches `UnorderedElementsAre(`expected matchers`)`. |
-| `Pointwise(m, container)`, `Pointwise(m, {e0, e1, ..., en})` | `argument` contains the same number of elements as in `container`, and for all i, (the i-th element in `argument`, the i-th element in `container`) match `m`, which is a matcher on 2-tuples. E.g. `Pointwise(Le(), upper_bounds)` verifies that each element in `argument` doesn't exceed the corresponding element in `upper_bounds`. See more detail below. |
-| `SizeIs(m)` | `argument` is a container whose size matches `m`. E.g. `SizeIs(2)` or `SizeIs(Lt(2))`. |
-| `UnorderedElementsAre(e0, e1, ..., en)` | `argument` has `n + 1` elements, and under *some* permutation of the elements, each element matches an `ei` (for a different `i`), which can be a value or a matcher. |
-| `UnorderedElementsAreArray({e0, e1, ..., en})`, `UnorderedElementsAreArray(a_container)`, `UnorderedElementsAreArray(begin, end)`, `UnorderedElementsAreArray(array)`, or `UnorderedElementsAreArray(array, count)` | The same as `UnorderedElementsAre()` except that the expected element values/matchers come from an initializer list, STL-style container, iterator range, or C-style array. |
-| `UnorderedPointwise(m, container)`, `UnorderedPointwise(m, {e0, e1, ..., en})` | Like `Pointwise(m, container)`, but ignores the order of elements. |
-| `WhenSorted(m)` | When `argument` is sorted using the `<` operator, it matches container matcher `m`. E.g. `WhenSorted(ElementsAre(1, 2, 3))` verifies that `argument` contains elements 1, 2, and 3, ignoring order. |
-| `WhenSortedBy(comparator, m)` | The same as `WhenSorted(m)`, except that the given comparator instead of `<` is used to sort `argument`. E.g. `WhenSortedBy(std::greater(), ElementsAre(3, 2, 1))`. |
-
-**Notes:**
-
-*   These matchers can also match:
-    1.  a native array passed by reference (e.g. in `Foo(const int (&a)[5])`),
-        and
-    2.  an array passed as a pointer and a count (e.g. in `Bar(const T* buffer,
-        int len)` -- see [Multi-argument Matchers](#MultiArgMatchers)).
-*   The array being matched may be multi-dimensional (i.e. its elements can be
-    arrays).
-*   `m` in `Pointwise(m, ...)` and `UnorderedPointwise(m, ...)` should be a
-    matcher for `::std::tuple<T, U>` where `T` and `U` are the element type of
-    the actual container and the expected container, respectively. For example,
-    to compare two `Foo` containers where `Foo` doesn't support `operator==`,
-    one might write:
-
-    ```cpp
-    using ::std::get;
-    MATCHER(FooEq, "") {
-      return std::get<0>(arg).Equals(std::get<1>(arg));
-    }
-    ...
-    EXPECT_THAT(actual_foos, Pointwise(FooEq(), expected_foos));
-    ```
-
-### Member Matchers
-
-| Matcher                         | Description                                |
-| :------------------------------ | :----------------------------------------- |
-| `Field(&class::field, m)`       | `argument.field` (or `argument->field` when `argument` is a plain pointer) matches matcher `m`, where `argument` is an object of type _class_. |
-| `Field(field_name, &class::field, m)` | The same as the two-parameter version, but provides a better error message. |
-| `Key(e)`                        | `argument.first` matches `e`, which can be either a value or a matcher. E.g. `Contains(Key(Le(5)))` can verify that a `map` contains a key `<= 5`. |
-| `Pair(m1, m2)`                  | `argument` is an `std::pair` whose `first` field matches `m1` and `second` field matches `m2`. |
-| `FieldsAre(m...)`                   | `argument` is a compatible object where each field matches piecewise with the matchers `m...`. A compatible object is any that supports the `std::tuple_size<Obj>`+`get<I>(obj)` protocol. In C++17 and up this also supports types compatible with structured bindings, like aggregates. |
-| `Property(&class::property, m)` | `argument.property()` (or `argument->property()` when `argument` is a plain pointer) matches matcher `m`, where `argument` is an object of type _class_. The method `property()` must take no argument and be declared as `const`. |
-| `Property(property_name, &class::property, m)` | The same as the two-parameter version, but provides a better error message.
-
-**Notes:**
-
-*   You can use `FieldsAre()` to match any type that supports structured
-    bindings, such as `std::tuple`, `std::pair`, `std::array`, and aggregate
-    types. For example:
-
-    ```cpp
-    std::tuple<int, std::string> my_tuple{7, "hello world"};
-    EXPECT_THAT(my_tuple, FieldsAre(Ge(0), HasSubstr("hello")));
-
-    struct MyStruct {
-      int value = 42;
-      std::string greeting = "aloha";
-    };
-    MyStruct s;
-    EXPECT_THAT(s, FieldsAre(42, "aloha"));
-    ```
-
-*   Don't use `Property()` against member functions that you do not own, because
-    taking addresses of functions is fragile and generally not part of the
-    contract of the function.
-
-### Matching the Result of a Function, Functor, or Callback
-
-| Matcher          | Description                                       |
-| :--------------- | :------------------------------------------------ |
-| `ResultOf(f, m)` | `f(argument)` matches matcher `m`, where `f` is a function or functor. |
-
-### Pointer Matchers
-
-| Matcher                   | Description                                     |
-| :------------------------ | :---------------------------------------------- |
-| `Address(m)`              | the result of `std::addressof(argument)` matches `m`. |
-| `Pointee(m)`              | `argument` (either a smart pointer or a raw pointer) points to a value that matches matcher `m`. |
-| `Pointer(m)`              | `argument` (either a smart pointer or a raw pointer) contains a pointer that matches `m`. `m` will match against the raw pointer regardless of the type of `argument`. |
-| `WhenDynamicCastTo<T>(m)` | when `argument` is passed through `dynamic_cast<T>()`, it matches matcher `m`. |
-
-### Multi-argument Matchers {#MultiArgMatchers}
-
-Technically, all matchers match a *single* value. A "multi-argument" matcher is
-just one that matches a *tuple*. The following matchers can be used to match a
-tuple `(x, y)`:
-
-Matcher | Description
-:------ | :----------
-`Eq()`  | `x == y`
-`Ge()`  | `x >= y`
-`Gt()`  | `x > y`
-`Le()`  | `x <= y`
-`Lt()`  | `x < y`
-`Ne()`  | `x != y`
-
-You can use the following selectors to pick a subset of the arguments (or
-reorder them) to participate in the matching:
-
-| Matcher                    | Description                                     |
-| :------------------------- | :---------------------------------------------- |
-| `AllArgs(m)`               | Equivalent to `m`. Useful as syntactic sugar in `.With(AllArgs(m))`. |
-| `Args<N1, N2, ..., Nk>(m)` | The tuple of the `k` selected (using 0-based indices) arguments matches `m`, e.g. `Args<1, 2>(Eq())`. |
-
-### Composite Matchers
-
-You can make a matcher from one or more other matchers:
-
-| Matcher                          | Description                             |
-| :------------------------------- | :-------------------------------------- |
-| `AllOf(m1, m2, ..., mn)` | `argument` matches all of the matchers `m1` to `mn`. |
-| `AllOfArray({m0, m1, ..., mn})`, `AllOfArray(a_container)`, `AllOfArray(begin, end)`, `AllOfArray(array)`, or `AllOfArray(array, count)` | The same as `AllOf()` except that the matchers come from an initializer list, STL-style container, iterator range, or C-style array. |
-| `AnyOf(m1, m2, ..., mn)` | `argument` matches at least one of the matchers `m1` to `mn`. |
-| `AnyOfArray({m0, m1, ..., mn})`, `AnyOfArray(a_container)`, `AnyOfArray(begin, end)`, `AnyOfArray(array)`, or `AnyOfArray(array, count)` | The same as `AnyOf()` except that the matchers come from an initializer list, STL-style container, iterator range, or C-style array. |
-| `Not(m)` | `argument` doesn't match matcher `m`. |
-
-### Adapters for Matchers
-
-| Matcher                 | Description                           |
-| :---------------------- | :------------------------------------ |
-| `MatcherCast<T>(m)`     | casts matcher `m` to type `Matcher<T>`. |
-| `SafeMatcherCast<T>(m)` | [safely casts](gmock_cook_book.md#casting-matchers) matcher `m` to type `Matcher<T>`. |
-| `Truly(predicate)`      | `predicate(argument)` returns something considered by C++ to be true, where `predicate` is a function or functor. |
-
-`AddressSatisfies(callback)` and `Truly(callback)` take ownership of `callback`,
-which must be a permanent callback.
-
-### Using Matchers as Predicates {#MatchersAsPredicatesCheat}
-
-| Matcher                       | Description                                 |
-| :---------------------------- | :------------------------------------------ |
-| `Matches(m)(value)` | evaluates to `true` if `value` matches `m`. You can use `Matches(m)` alone as a unary functor. |
-| `ExplainMatchResult(m, value, result_listener)` | evaluates to `true` if `value` matches `m`, explaining the result to `result_listener`. |
-| `Value(value, m)` | evaluates to `true` if `value` matches `m`. |
-
-### Defining Matchers
-
-| Matcher                              | Description                           |
-| :----------------------------------- | :------------------------------------ |
-| `MATCHER(IsEven, "") { return (arg % 2) == 0; }` | Defines a matcher `IsEven()` to match an even number. |
-| `MATCHER_P(IsDivisibleBy, n, "") { *result_listener << "where the remainder is " << (arg % n); return (arg % n) == 0; }` | Defines a matcher `IsDivisibleBy(n)` to match a number divisible by `n`. |
-| `MATCHER_P2(IsBetween, a, b, absl::StrCat(negation ? "isn't" : "is", " between ", PrintToString(a), " and ", PrintToString(b))) { return a <= arg && arg <= b; }` | Defines a matcher `IsBetween(a, b)` to match a value in the range [`a`, `b`]. |
-
-**Notes:**
-
-1.  The `MATCHER*` macros cannot be used inside a function or class.
-2.  The matcher body must be *purely functional* (i.e. it cannot have any side
-    effect, and the result must not depend on anything other than the value
-    being matched and the matcher parameters).
-3.  You can use `PrintToString(x)` to convert a value `x` of any type to a
-    string.
-4.  You can use `ExplainMatchResult()` in a custom matcher to wrap another
-    matcher, for example:
-
-    ```cpp
-    MATCHER_P(NestedPropertyMatches, matcher, "") {
-      return ExplainMatchResult(matcher, arg.nested().property(), result_listener);
-    }
-    ```
diff --git a/third_party/googletest/docs/samples.md b/third_party/googletest/docs/samples.md
deleted file mode 100644
index 2d97ca5..0000000
--- a/third_party/googletest/docs/samples.md
+++ /dev/null
@@ -1,22 +0,0 @@
-# Googletest Samples
-
-If you're like us, you'd like to look at
-[googletest samples.](https://github.com/google/googletest/tree/master/googletest/samples)
-The sample directory has a number of well-commented samples showing how to use a
-variety of googletest features.
-
-*   Sample #1 shows the basic steps of using googletest to test C++ functions.
-*   Sample #2 shows a more complex unit test for a class with multiple member
-    functions.
-*   Sample #3 uses a test fixture.
-*   Sample #4 teaches you how to use googletest and `googletest.h` together to
-    get the best of both libraries.
-*   Sample #5 puts shared testing logic in a base test fixture, and reuses it in
-    derived fixtures.
-*   Sample #6 demonstrates type-parameterized tests.
-*   Sample #7 teaches the basics of value-parameterized tests.
-*   Sample #8 shows using `Combine()` in value-parameterized tests.
-*   Sample #9 shows use of the listener API to modify Google Test's console
-    output and the use of its reflection API to inspect test results.
-*   Sample #10 shows use of the listener API to implement a primitive memory
-    leak checker.
diff --git a/third_party/googletest/googlemock/CMakeLists.txt b/third_party/googletest/googlemock/CMakeLists.txt
deleted file mode 100644
index e7df8ec..0000000
--- a/third_party/googletest/googlemock/CMakeLists.txt
+++ /dev/null
@@ -1,218 +0,0 @@
-########################################################################
-# Note: CMake support is community-based. The maintainers do not use CMake
-# internally.
-#
-# CMake build script for Google Mock.
-#
-# To run the tests for Google Mock itself on Linux, use 'make test' or
-# ctest.  You can select which tests to run using 'ctest -R regex'.
-# For more options, run 'ctest --help'.
-
-option(gmock_build_tests "Build all of Google Mock's own tests." OFF)
-
-# A directory to find Google Test sources.
-if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt")
-  set(gtest_dir gtest)
-else()
-  set(gtest_dir ../googletest)
-endif()
-
-# Defines pre_project_set_up_hermetic_build() and set_up_hermetic_build().
-include("${gtest_dir}/cmake/hermetic_build.cmake" OPTIONAL)
-
-if (COMMAND pre_project_set_up_hermetic_build)
-  # Google Test also calls hermetic setup functions from add_subdirectory,
-  # although its changes will not affect things at the current scope.
-  pre_project_set_up_hermetic_build()
-endif()
-
-########################################################################
-#
-# Project-wide settings
-
-# Name of the project.
-#
-# CMake files in this project can refer to the root source directory
-# as ${gmock_SOURCE_DIR} and to the root binary directory as
-# ${gmock_BINARY_DIR}.
-# Language "C" is required for find_package(Threads).
-if (CMAKE_VERSION VERSION_LESS 3.0)
-  project(gmock CXX C)
-else()
-  cmake_policy(SET CMP0048 NEW)
-  project(gmock VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
-endif()
-cmake_minimum_required(VERSION 2.8.12)
-
-if (COMMAND set_up_hermetic_build)
-  set_up_hermetic_build()
-endif()
-
-# Instructs CMake to process Google Test's CMakeLists.txt and add its
-# targets to the current scope.  We are placing Google Test's binary
-# directory in a subdirectory of our own as VC compilation may break
-# if they are the same (the default).
-add_subdirectory("${gtest_dir}" "${gmock_BINARY_DIR}/${gtest_dir}")
-
-
-# These commands only run if this is the main project
-if(CMAKE_PROJECT_NAME STREQUAL "gmock" OR CMAKE_PROJECT_NAME STREQUAL "googletest-distribution")
-  # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
-  # make it prominent in the GUI.
-  option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)
-else()
-  mark_as_advanced(gmock_build_tests)
-endif()
-
-# Although Google Test's CMakeLists.txt calls this function, the
-# changes there don't affect the current scope.  Therefore we have to
-# call it again here.
-config_compiler_and_linker()  # from ${gtest_dir}/cmake/internal_utils.cmake
-
-# Adds Google Mock's and Google Test's header directories to the search path.
-set(gmock_build_include_dirs
-  "${gmock_SOURCE_DIR}/include"
-  "${gmock_SOURCE_DIR}"
-  "${gtest_SOURCE_DIR}/include"
-  # This directory is needed to build directly from Google Test sources.
-  "${gtest_SOURCE_DIR}")
-include_directories(${gmock_build_include_dirs})
-
-########################################################################
-#
-# Defines the gmock & gmock_main libraries.  User tests should link
-# with one of them.
-
-# Google Mock libraries.  We build them using more strict warnings than what
-# are used for other targets, to ensure that Google Mock can be compiled by
-# a user aggressive about warnings.
-if (MSVC)
-  cxx_library(gmock
-              "${cxx_strict}"
-              "${gtest_dir}/src/gtest-all.cc"
-              src/gmock-all.cc)
-
-  cxx_library(gmock_main
-              "${cxx_strict}"
-              "${gtest_dir}/src/gtest-all.cc"
-              src/gmock-all.cc
-              src/gmock_main.cc)
-else()
-  cxx_library(gmock "${cxx_strict}" src/gmock-all.cc)
-  target_link_libraries(gmock PUBLIC gtest)
-  set_target_properties(gmock PROPERTIES VERSION ${GOOGLETEST_VERSION})
-  cxx_library(gmock_main "${cxx_strict}" src/gmock_main.cc)
-  target_link_libraries(gmock_main PUBLIC gmock)
-  set_target_properties(gmock_main PROPERTIES VERSION ${GOOGLETEST_VERSION})
-endif()
-# If the CMake version supports it, attach header directory information
-# to the targets for when we are part of a parent build (ie being pulled
-# in via add_subdirectory() rather than being a standalone build).
-if (DEFINED CMAKE_VERSION AND NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-  target_include_directories(gmock SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gmock_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-  target_include_directories(gmock_main SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gmock_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-endif()
-
-########################################################################
-#
-# Install rules
-install_project(gmock gmock_main)
-
-########################################################################
-#
-# Google Mock's own tests.
-#
-# You can skip this section if you aren't interested in testing
-# Google Mock itself.
-#
-# The tests are not built by default.  To build them, set the
-# gmock_build_tests option to ON.  You can do it by running ccmake
-# or specifying the -Dgmock_build_tests=ON flag when running cmake.
-
-if (gmock_build_tests)
-  # This must be set in the root directory for the tests to be run by
-  # 'make test' or ctest.
-  enable_testing()
-
-  if (MINGW OR CYGWIN)
-    if (CMAKE_VERSION VERSION_LESS "2.8.12")
-      add_compile_options("-Wa,-mbig-obj")
-    else()
-      add_definitions("-Wa,-mbig-obj")
-    endif()
-  endif()
-
-  ############################################################
-  # C++ tests built with standard compiler flags.
-
-  cxx_test(gmock-actions_test gmock_main)
-  cxx_test(gmock-cardinalities_test gmock_main)
-  cxx_test(gmock_ex_test gmock_main)
-  cxx_test(gmock-function-mocker_test gmock_main)
-  cxx_test(gmock-internal-utils_test gmock_main)
-  cxx_test(gmock-matchers_test gmock_main)
-  cxx_test(gmock-more-actions_test gmock_main)
-  cxx_test(gmock-nice-strict_test gmock_main)
-  cxx_test(gmock-port_test gmock_main)
-  cxx_test(gmock-spec-builders_test gmock_main)
-  cxx_test(gmock_link_test gmock_main test/gmock_link2_test.cc)
-  cxx_test(gmock_test gmock_main)
-
-  if (DEFINED GTEST_HAS_PTHREAD)
-    cxx_test(gmock_stress_test gmock)
-  endif()
-
-  # gmock_all_test is commented to save time building and running tests.
-  # Uncomment if necessary.
-  # cxx_test(gmock_all_test gmock_main)
-
-  ############################################################
-  # C++ tests built with non-standard compiler flags.
-
-  if (MSVC)
-    cxx_library(gmock_main_no_exception "${cxx_no_exception}"
-      "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
-
-    cxx_library(gmock_main_no_rtti "${cxx_no_rtti}"
-      "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
-
-  else()
-    cxx_library(gmock_main_no_exception "${cxx_no_exception}" src/gmock_main.cc)
-    target_link_libraries(gmock_main_no_exception PUBLIC gmock)
-
-    cxx_library(gmock_main_no_rtti "${cxx_no_rtti}" src/gmock_main.cc)
-    target_link_libraries(gmock_main_no_rtti PUBLIC gmock)
-  endif()
-  cxx_test_with_flags(gmock-more-actions_no_exception_test "${cxx_no_exception}"
-    gmock_main_no_exception test/gmock-more-actions_test.cc)
-
-  cxx_test_with_flags(gmock_no_rtti_test "${cxx_no_rtti}"
-    gmock_main_no_rtti test/gmock-spec-builders_test.cc)
-
-  cxx_shared_library(shared_gmock_main "${cxx_default}"
-    "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
-
-  # Tests that a binary can be built with Google Mock as a shared library.  On
-  # some system configurations, it may not possible to run the binary without
-  # knowing more details about the system configurations. We do not try to run
-  # this binary. To get a more robust shared library coverage, configure with
-  # -DBUILD_SHARED_LIBS=ON.
-  cxx_executable_with_flags(shared_gmock_test_ "${cxx_default}"
-    shared_gmock_main test/gmock-spec-builders_test.cc)
-  set_target_properties(shared_gmock_test_
-    PROPERTIES
-    COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-
-  ############################################################
-  # Python tests.
-
-  cxx_executable(gmock_leak_test_ test gmock_main)
-  py_test(gmock_leak_test)
-
-  cxx_executable(gmock_output_test_ test gmock)
-  py_test(gmock_output_test)
-endif()
diff --git a/third_party/googletest/googlemock/README.md b/third_party/googletest/googlemock/README.md
deleted file mode 100644
index ead6883..0000000
--- a/third_party/googletest/googlemock/README.md
+++ /dev/null
@@ -1,44 +0,0 @@
-# Googletest Mocking (gMock) Framework
-
-### Overview
-
-Google's framework for writing and using C++ mock classes. It can help you
-derive better designs of your system and write better tests.
-
-It is inspired by:
-
-*   [jMock](http://www.jmock.org/)
-*   [EasyMock](http://www.easymock.org/)
-*   [Hamcrest](http://code.google.com/p/hamcrest/)
-
-It is designed with C++'s specifics in mind.
-
-gMock:
-
--   Provides a declarative syntax for defining mocks.
--   Can define partial (hybrid) mocks, which are a cross of real and mock
-    objects.
--   Handles functions of arbitrary types and overloaded functions.
--   Comes with a rich set of matchers for validating function arguments.
--   Uses an intuitive syntax for controlling the behavior of a mock.
--   Does automatic verification of expectations (no record-and-replay needed).
--   Allows arbitrary (partial) ordering constraints on function calls to be
-    expressed.
--   Lets a user extend it by defining new matchers and actions.
--   Does not use exceptions.
--   Is easy to learn and use.
-
-Details and examples can be found here:
-
-*   [gMock for Dummies](https://google.github.io/googletest/gmock_for_dummies.html)
-*   [Legacy gMock FAQ](https://google.github.io/googletest/gmock_faq.html)
-*   [gMock Cookbook](https://google.github.io/googletest/gmock_cook_book.html)
-*   [gMock Cheat Sheet](https://google.github.io/googletest/gmock_cheat_sheet.html)
-
-Please note that code under scripts/generator/ is from the
-[cppclean project](http://code.google.com/p/cppclean/) and under the Apache
-License, which is different from GoogleMock's license.
-
-GoogleMock is a part of
-[GoogleTest C++ testing framework](http://github.com/google/googletest/) and a
-subject to the same requirements.
diff --git a/third_party/googletest/googlemock/cmake/gmock.pc.in b/third_party/googletest/googlemock/cmake/gmock.pc.in
deleted file mode 100644
index 23c67b5..0000000
--- a/third_party/googletest/googlemock/cmake/gmock.pc.in
+++ /dev/null
@@ -1,10 +0,0 @@
-libdir=@CMAKE_INSTALL_FULL_LIBDIR@
-includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
-
-Name: gmock
-Description: GoogleMock (without main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Requires: gtest = @PROJECT_VERSION@
-Libs: -L${libdir} -lgmock @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@
diff --git a/third_party/googletest/googlemock/cmake/gmock_main.pc.in b/third_party/googletest/googlemock/cmake/gmock_main.pc.in
deleted file mode 100644
index 66ffea7..0000000
--- a/third_party/googletest/googlemock/cmake/gmock_main.pc.in
+++ /dev/null
@@ -1,10 +0,0 @@
-libdir=@CMAKE_INSTALL_FULL_LIBDIR@
-includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
-
-Name: gmock_main
-Description: GoogleMock (with main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Requires: gmock = @PROJECT_VERSION@
-Libs: -L${libdir} -lgmock_main @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@
diff --git a/third_party/googletest/googlemock/docs/README.md b/third_party/googletest/googlemock/docs/README.md
deleted file mode 100644
index 1bc57b7..0000000
--- a/third_party/googletest/googlemock/docs/README.md
+++ /dev/null
@@ -1,4 +0,0 @@
-# Content Moved
-
-We are working on updates to the GoogleTest documentation, which has moved to
-the top-level [docs](../../docs) directory.
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-actions.h b/third_party/googletest/googlemock/include/gmock/gmock-actions.h
deleted file mode 100644
index f2393bd..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-actions.h
+++ /dev/null
@@ -1,1687 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// The ACTION* family of macros can be used in a namespace scope to
-// define custom actions easily.  The syntax:
-//
-//   ACTION(name) { statements; }
-//
-// will define an action with the given name that executes the
-// statements.  The value returned by the statements will be used as
-// the return value of the action.  Inside the statements, you can
-// refer to the K-th (0-based) argument of the mock function by
-// 'argK', and refer to its type by 'argK_type'.  For example:
-//
-//   ACTION(IncrementArg1) {
-//     arg1_type temp = arg1;
-//     return ++(*temp);
-//   }
-//
-// allows you to write
-//
-//   ...WillOnce(IncrementArg1());
-//
-// You can also refer to the entire argument tuple and its type by
-// 'args' and 'args_type', and refer to the mock function type and its
-// return type by 'function_type' and 'return_type'.
-//
-// Note that you don't need to specify the types of the mock function
-// arguments.  However rest assured that your code is still type-safe:
-// you'll get a compiler error if *arg1 doesn't support the ++
-// operator, or if the type of ++(*arg1) isn't compatible with the
-// mock function's return type, for example.
-//
-// Sometimes you'll want to parameterize the action.   For that you can use
-// another macro:
-//
-//   ACTION_P(name, param_name) { statements; }
-//
-// For example:
-//
-//   ACTION_P(Add, n) { return arg0 + n; }
-//
-// will allow you to write:
-//
-//   ...WillOnce(Add(5));
-//
-// Note that you don't need to provide the type of the parameter
-// either.  If you need to reference the type of a parameter named
-// 'foo', you can write 'foo_type'.  For example, in the body of
-// ACTION_P(Add, n) above, you can write 'n_type' to refer to the type
-// of 'n'.
-//
-// We also provide ACTION_P2, ACTION_P3, ..., up to ACTION_P10 to support
-// multi-parameter actions.
-//
-// For the purpose of typing, you can view
-//
-//   ACTION_Pk(Foo, p1, ..., pk) { ... }
-//
-// as shorthand for
-//
-//   template <typename p1_type, ..., typename pk_type>
-//   FooActionPk<p1_type, ..., pk_type> Foo(p1_type p1, ..., pk_type pk) { ... }
-//
-// In particular, you can provide the template type arguments
-// explicitly when invoking Foo(), as in Foo<long, bool>(5, false);
-// although usually you can rely on the compiler to infer the types
-// for you automatically.  You can assign the result of expression
-// Foo(p1, ..., pk) to a variable of type FooActionPk<p1_type, ...,
-// pk_type>.  This can be useful when composing actions.
-//
-// You can also overload actions with different numbers of parameters:
-//
-//   ACTION_P(Plus, a) { ... }
-//   ACTION_P2(Plus, a, b) { ... }
-//
-// While it's tempting to always use the ACTION* macros when defining
-// a new action, you should also consider implementing ActionInterface
-// or using MakePolymorphicAction() instead, especially if you need to
-// use the action a lot.  While these approaches require more work,
-// they give you more control on the types of the mock function
-// arguments and the action parameters, which in general leads to
-// better compiler error messages that pay off in the long run.  They
-// also allow overloading actions based on parameter types (as opposed
-// to just based on the number of parameters).
-//
-// CAVEAT:
-//
-// ACTION*() can only be used in a namespace scope as templates cannot be
-// declared inside of a local class.
-// Users can, however, define any local functors (e.g. a lambda) that
-// can be used as actions.
-//
-// MORE INFORMATION:
-//
-// To learn more about using these macros, please search for 'ACTION' on
-// https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
-
-#ifndef _WIN32_WCE
-# include <errno.h>
-#endif
-
-#include <algorithm>
-#include <functional>
-#include <memory>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-#include "gmock/internal/gmock-internal-utils.h"
-#include "gmock/internal/gmock-port.h"
-#include "gmock/internal/gmock-pp.h"
-
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-namespace testing {
-
-// To implement an action Foo, define:
-//   1. a class FooAction that implements the ActionInterface interface, and
-//   2. a factory function that creates an Action object from a
-//      const FooAction*.
-//
-// The two-level delegation design follows that of Matcher, providing
-// consistency for extension developers.  It also eases ownership
-// management as Action objects can now be copied like plain values.
-
-namespace internal {
-
-// BuiltInDefaultValueGetter<T, true>::Get() returns a
-// default-constructed T value.  BuiltInDefaultValueGetter<T,
-// false>::Get() crashes with an error.
-//
-// This primary template is used when kDefaultConstructible is true.
-template <typename T, bool kDefaultConstructible>
-struct BuiltInDefaultValueGetter {
-  static T Get() { return T(); }
-};
-template <typename T>
-struct BuiltInDefaultValueGetter<T, false> {
-  static T Get() {
-    Assert(false, __FILE__, __LINE__,
-           "Default action undefined for the function return type.");
-    return internal::Invalid<T>();
-    // The above statement will never be reached, but is required in
-    // order for this function to compile.
-  }
-};
-
-// BuiltInDefaultValue<T>::Get() returns the "built-in" default value
-// for type T, which is NULL when T is a raw pointer type, 0 when T is
-// a numeric type, false when T is bool, or "" when T is string or
-// std::string.  In addition, in C++11 and above, it turns a
-// default-constructed T value if T is default constructible.  For any
-// other type T, the built-in default T value is undefined, and the
-// function will abort the process.
-template <typename T>
-class BuiltInDefaultValue {
- public:
-  // This function returns true if and only if type T has a built-in default
-  // value.
-  static bool Exists() {
-    return ::std::is_default_constructible<T>::value;
-  }
-
-  static T Get() {
-    return BuiltInDefaultValueGetter<
-        T, ::std::is_default_constructible<T>::value>::Get();
-  }
-};
-
-// This partial specialization says that we use the same built-in
-// default value for T and const T.
-template <typename T>
-class BuiltInDefaultValue<const T> {
- public:
-  static bool Exists() { return BuiltInDefaultValue<T>::Exists(); }
-  static T Get() { return BuiltInDefaultValue<T>::Get(); }
-};
-
-// This partial specialization defines the default values for pointer
-// types.
-template <typename T>
-class BuiltInDefaultValue<T*> {
- public:
-  static bool Exists() { return true; }
-  static T* Get() { return nullptr; }
-};
-
-// The following specializations define the default values for
-// specific types we care about.
-#define GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(type, value) \
-  template <> \
-  class BuiltInDefaultValue<type> { \
-   public: \
-    static bool Exists() { return true; } \
-    static type Get() { return value; } \
-  }
-
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(void, );  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(::std::string, "");
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(bool, false);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned char, '\0');
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed char, '\0');
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(char, '\0');
-
-// There's no need for a default action for signed wchar_t, as that
-// type is the same as wchar_t for gcc, and invalid for MSVC.
-//
-// There's also no need for a default action for unsigned wchar_t, as
-// that type is the same as unsigned int for gcc, and invalid for
-// MSVC.
-#if GMOCK_WCHAR_T_IS_NATIVE_
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(wchar_t, 0U);  // NOLINT
-#endif
-
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned short, 0U);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed short, 0);     // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned int, 0U);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed int, 0);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long, 0UL);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long, 0L);     // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long long, 0);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long long, 0);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(float, 0);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(double, 0);
-
-#undef GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_
-
-// Simple two-arg form of std::disjunction.
-template <typename P, typename Q>
-using disjunction = typename ::std::conditional<P::value, P, Q>::type;
-
-}  // namespace internal
-
-// When an unexpected function call is encountered, Google Mock will
-// let it return a default value if the user has specified one for its
-// return type, or if the return type has a built-in default value;
-// otherwise Google Mock won't know what value to return and will have
-// to abort the process.
-//
-// The DefaultValue<T> class allows a user to specify the
-// default value for a type T that is both copyable and publicly
-// destructible (i.e. anything that can be used as a function return
-// type).  The usage is:
-//
-//   // Sets the default value for type T to be foo.
-//   DefaultValue<T>::Set(foo);
-template <typename T>
-class DefaultValue {
- public:
-  // Sets the default value for type T; requires T to be
-  // copy-constructable and have a public destructor.
-  static void Set(T x) {
-    delete producer_;
-    producer_ = new FixedValueProducer(x);
-  }
-
-  // Provides a factory function to be called to generate the default value.
-  // This method can be used even if T is only move-constructible, but it is not
-  // limited to that case.
-  typedef T (*FactoryFunction)();
-  static void SetFactory(FactoryFunction factory) {
-    delete producer_;
-    producer_ = new FactoryValueProducer(factory);
-  }
-
-  // Unsets the default value for type T.
-  static void Clear() {
-    delete producer_;
-    producer_ = nullptr;
-  }
-
-  // Returns true if and only if the user has set the default value for type T.
-  static bool IsSet() { return producer_ != nullptr; }
-
-  // Returns true if T has a default return value set by the user or there
-  // exists a built-in default value.
-  static bool Exists() {
-    return IsSet() || internal::BuiltInDefaultValue<T>::Exists();
-  }
-
-  // Returns the default value for type T if the user has set one;
-  // otherwise returns the built-in default value. Requires that Exists()
-  // is true, which ensures that the return value is well-defined.
-  static T Get() {
-    return producer_ == nullptr ? internal::BuiltInDefaultValue<T>::Get()
-                                : producer_->Produce();
-  }
-
- private:
-  class ValueProducer {
-   public:
-    virtual ~ValueProducer() {}
-    virtual T Produce() = 0;
-  };
-
-  class FixedValueProducer : public ValueProducer {
-   public:
-    explicit FixedValueProducer(T value) : value_(value) {}
-    T Produce() override { return value_; }
-
-   private:
-    const T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(FixedValueProducer);
-  };
-
-  class FactoryValueProducer : public ValueProducer {
-   public:
-    explicit FactoryValueProducer(FactoryFunction factory)
-        : factory_(factory) {}
-    T Produce() override { return factory_(); }
-
-   private:
-    const FactoryFunction factory_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(FactoryValueProducer);
-  };
-
-  static ValueProducer* producer_;
-};
-
-// This partial specialization allows a user to set default values for
-// reference types.
-template <typename T>
-class DefaultValue<T&> {
- public:
-  // Sets the default value for type T&.
-  static void Set(T& x) {  // NOLINT
-    address_ = &x;
-  }
-
-  // Unsets the default value for type T&.
-  static void Clear() { address_ = nullptr; }
-
-  // Returns true if and only if the user has set the default value for type T&.
-  static bool IsSet() { return address_ != nullptr; }
-
-  // Returns true if T has a default return value set by the user or there
-  // exists a built-in default value.
-  static bool Exists() {
-    return IsSet() || internal::BuiltInDefaultValue<T&>::Exists();
-  }
-
-  // Returns the default value for type T& if the user has set one;
-  // otherwise returns the built-in default value if there is one;
-  // otherwise aborts the process.
-  static T& Get() {
-    return address_ == nullptr ? internal::BuiltInDefaultValue<T&>::Get()
-                               : *address_;
-  }
-
- private:
-  static T* address_;
-};
-
-// This specialization allows DefaultValue<void>::Get() to
-// compile.
-template <>
-class DefaultValue<void> {
- public:
-  static bool Exists() { return true; }
-  static void Get() {}
-};
-
-// Points to the user-set default value for type T.
-template <typename T>
-typename DefaultValue<T>::ValueProducer* DefaultValue<T>::producer_ = nullptr;
-
-// Points to the user-set default value for type T&.
-template <typename T>
-T* DefaultValue<T&>::address_ = nullptr;
-
-// Implement this interface to define an action for function type F.
-template <typename F>
-class ActionInterface {
- public:
-  typedef typename internal::Function<F>::Result Result;
-  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-  ActionInterface() {}
-  virtual ~ActionInterface() {}
-
-  // Performs the action.  This method is not const, as in general an
-  // action can have side effects and be stateful.  For example, a
-  // get-the-next-element-from-the-collection action will need to
-  // remember the current element.
-  virtual Result Perform(const ArgumentTuple& args) = 0;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionInterface);
-};
-
-// An Action<F> is a copyable and IMMUTABLE (except by assignment)
-// object that represents an action to be taken when a mock function
-// of type F is called.  The implementation of Action<T> is just a
-// std::shared_ptr to const ActionInterface<T>. Don't inherit from Action!
-// You can view an object implementing ActionInterface<F> as a
-// concrete action (including its current state), and an Action<F>
-// object as a handle to it.
-template <typename F>
-class Action {
-  // Adapter class to allow constructing Action from a legacy ActionInterface.
-  // New code should create Actions from functors instead.
-  struct ActionAdapter {
-    // Adapter must be copyable to satisfy std::function requirements.
-    ::std::shared_ptr<ActionInterface<F>> impl_;
-
-    template <typename... Args>
-    typename internal::Function<F>::Result operator()(Args&&... args) {
-      return impl_->Perform(
-          ::std::forward_as_tuple(::std::forward<Args>(args)...));
-    }
-  };
-
-  template <typename G>
-  using IsCompatibleFunctor = std::is_constructible<std::function<F>, G>;
-
- public:
-  typedef typename internal::Function<F>::Result Result;
-  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-  // Constructs a null Action.  Needed for storing Action objects in
-  // STL containers.
-  Action() {}
-
-  // Construct an Action from a specified callable.
-  // This cannot take std::function directly, because then Action would not be
-  // directly constructible from lambda (it would require two conversions).
-  template <
-      typename G,
-      typename = typename std::enable_if<internal::disjunction<
-          IsCompatibleFunctor<G>, std::is_constructible<std::function<Result()>,
-                                                        G>>::value>::type>
-  Action(G&& fun) {  // NOLINT
-    Init(::std::forward<G>(fun), IsCompatibleFunctor<G>());
-  }
-
-  // Constructs an Action from its implementation.
-  explicit Action(ActionInterface<F>* impl)
-      : fun_(ActionAdapter{::std::shared_ptr<ActionInterface<F>>(impl)}) {}
-
-  // This constructor allows us to turn an Action<Func> object into an
-  // Action<F>, as long as F's arguments can be implicitly converted
-  // to Func's and Func's return type can be implicitly converted to F's.
-  template <typename Func>
-  explicit Action(const Action<Func>& action) : fun_(action.fun_) {}
-
-  // Returns true if and only if this is the DoDefault() action.
-  bool IsDoDefault() const { return fun_ == nullptr; }
-
-  // Performs the action.  Note that this method is const even though
-  // the corresponding method in ActionInterface is not.  The reason
-  // is that a const Action<F> means that it cannot be re-bound to
-  // another concrete action, not that the concrete action it binds to
-  // cannot change state.  (Think of the difference between a const
-  // pointer and a pointer to const.)
-  Result Perform(ArgumentTuple args) const {
-    if (IsDoDefault()) {
-      internal::IllegalDoDefault(__FILE__, __LINE__);
-    }
-    return internal::Apply(fun_, ::std::move(args));
-  }
-
- private:
-  template <typename G>
-  friend class Action;
-
-  template <typename G>
-  void Init(G&& g, ::std::true_type) {
-    fun_ = ::std::forward<G>(g);
-  }
-
-  template <typename G>
-  void Init(G&& g, ::std::false_type) {
-    fun_ = IgnoreArgs<typename ::std::decay<G>::type>{::std::forward<G>(g)};
-  }
-
-  template <typename FunctionImpl>
-  struct IgnoreArgs {
-    template <typename... Args>
-    Result operator()(const Args&...) const {
-      return function_impl();
-    }
-
-    FunctionImpl function_impl;
-  };
-
-  // fun_ is an empty function if and only if this is the DoDefault() action.
-  ::std::function<F> fun_;
-};
-
-// The PolymorphicAction class template makes it easy to implement a
-// polymorphic action (i.e. an action that can be used in mock
-// functions of than one type, e.g. Return()).
-//
-// To define a polymorphic action, a user first provides a COPYABLE
-// implementation class that has a Perform() method template:
-//
-//   class FooAction {
-//    public:
-//     template <typename Result, typename ArgumentTuple>
-//     Result Perform(const ArgumentTuple& args) const {
-//       // Processes the arguments and returns a result, using
-//       // std::get<N>(args) to get the N-th (0-based) argument in the tuple.
-//     }
-//     ...
-//   };
-//
-// Then the user creates the polymorphic action using
-// MakePolymorphicAction(object) where object has type FooAction.  See
-// the definition of Return(void) and SetArgumentPointee<N>(value) for
-// complete examples.
-template <typename Impl>
-class PolymorphicAction {
- public:
-  explicit PolymorphicAction(const Impl& impl) : impl_(impl) {}
-
-  template <typename F>
-  operator Action<F>() const {
-    return Action<F>(new MonomorphicImpl<F>(impl_));
-  }
-
- private:
-  template <typename F>
-  class MonomorphicImpl : public ActionInterface<F> {
-   public:
-    typedef typename internal::Function<F>::Result Result;
-    typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
-
-    Result Perform(const ArgumentTuple& args) override {
-      return impl_.template Perform<Result>(args);
-    }
-
-   private:
-    Impl impl_;
-  };
-
-  Impl impl_;
-};
-
-// Creates an Action from its implementation and returns it.  The
-// created Action object owns the implementation.
-template <typename F>
-Action<F> MakeAction(ActionInterface<F>* impl) {
-  return Action<F>(impl);
-}
-
-// Creates a polymorphic action from its implementation.  This is
-// easier to use than the PolymorphicAction<Impl> constructor as it
-// doesn't require you to explicitly write the template argument, e.g.
-//
-//   MakePolymorphicAction(foo);
-// vs
-//   PolymorphicAction<TypeOfFoo>(foo);
-template <typename Impl>
-inline PolymorphicAction<Impl> MakePolymorphicAction(const Impl& impl) {
-  return PolymorphicAction<Impl>(impl);
-}
-
-namespace internal {
-
-// Helper struct to specialize ReturnAction to execute a move instead of a copy
-// on return. Useful for move-only types, but could be used on any type.
-template <typename T>
-struct ByMoveWrapper {
-  explicit ByMoveWrapper(T value) : payload(std::move(value)) {}
-  T payload;
-};
-
-// Implements the polymorphic Return(x) action, which can be used in
-// any function that returns the type of x, regardless of the argument
-// types.
-//
-// Note: The value passed into Return must be converted into
-// Function<F>::Result when this action is cast to Action<F> rather than
-// when that action is performed. This is important in scenarios like
-//
-// MOCK_METHOD1(Method, T(U));
-// ...
-// {
-//   Foo foo;
-//   X x(&foo);
-//   EXPECT_CALL(mock, Method(_)).WillOnce(Return(x));
-// }
-//
-// In the example above the variable x holds reference to foo which leaves
-// scope and gets destroyed.  If copying X just copies a reference to foo,
-// that copy will be left with a hanging reference.  If conversion to T
-// makes a copy of foo, the above code is safe. To support that scenario, we
-// need to make sure that the type conversion happens inside the EXPECT_CALL
-// statement, and conversion of the result of Return to Action<T(U)> is a
-// good place for that.
-//
-// The real life example of the above scenario happens when an invocation
-// of gtl::Container() is passed into Return.
-//
-template <typename R>
-class ReturnAction {
- public:
-  // Constructs a ReturnAction object from the value to be returned.
-  // 'value' is passed by value instead of by const reference in order
-  // to allow Return("string literal") to compile.
-  explicit ReturnAction(R value) : value_(new R(std::move(value))) {}
-
-  // This template type conversion operator allows Return(x) to be
-  // used in ANY function that returns x's type.
-  template <typename F>
-  operator Action<F>() const {  // NOLINT
-    // Assert statement belongs here because this is the best place to verify
-    // conditions on F. It produces the clearest error messages
-    // in most compilers.
-    // Impl really belongs in this scope as a local class but can't
-    // because MSVC produces duplicate symbols in different translation units
-    // in this case. Until MS fixes that bug we put Impl into the class scope
-    // and put the typedef both here (for use in assert statement) and
-    // in the Impl class. But both definitions must be the same.
-    typedef typename Function<F>::Result Result;
-    GTEST_COMPILE_ASSERT_(
-        !std::is_reference<Result>::value,
-        use_ReturnRef_instead_of_Return_to_return_a_reference);
-    static_assert(!std::is_void<Result>::value,
-                  "Can't use Return() on an action expected to return `void`.");
-    return Action<F>(new Impl<R, F>(value_));
-  }
-
- private:
-  // Implements the Return(x) action for a particular function type F.
-  template <typename R_, typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    // The implicit cast is necessary when Result has more than one
-    // single-argument constructor (e.g. Result is std::vector<int>) and R
-    // has a type conversion operator template.  In that case, value_(value)
-    // won't compile as the compiler doesn't known which constructor of
-    // Result to call.  ImplicitCast_ forces the compiler to convert R to
-    // Result without considering explicit constructors, thus resolving the
-    // ambiguity. value_ is then initialized using its copy constructor.
-    explicit Impl(const std::shared_ptr<R>& value)
-        : value_before_cast_(*value),
-          value_(ImplicitCast_<Result>(value_before_cast_)) {}
-
-    Result Perform(const ArgumentTuple&) override { return value_; }
-
-   private:
-    GTEST_COMPILE_ASSERT_(!std::is_reference<Result>::value,
-                          Result_cannot_be_a_reference_type);
-    // We save the value before casting just in case it is being cast to a
-    // wrapper type.
-    R value_before_cast_;
-    Result value_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
-  };
-
-  // Partially specialize for ByMoveWrapper. This version of ReturnAction will
-  // move its contents instead.
-  template <typename R_, typename F>
-  class Impl<ByMoveWrapper<R_>, F> : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(const std::shared_ptr<R>& wrapper)
-        : performed_(false), wrapper_(wrapper) {}
-
-    Result Perform(const ArgumentTuple&) override {
-      GTEST_CHECK_(!performed_)
-          << "A ByMove() action should only be performed once.";
-      performed_ = true;
-      return std::move(wrapper_->payload);
-    }
-
-   private:
-    bool performed_;
-    const std::shared_ptr<R> wrapper_;
-  };
-
-  const std::shared_ptr<R> value_;
-};
-
-// Implements the ReturnNull() action.
-class ReturnNullAction {
- public:
-  // Allows ReturnNull() to be used in any pointer-returning function. In C++11
-  // this is enforced by returning nullptr, and in non-C++11 by asserting a
-  // pointer type on compile time.
-  template <typename Result, typename ArgumentTuple>
-  static Result Perform(const ArgumentTuple&) {
-    return nullptr;
-  }
-};
-
-// Implements the Return() action.
-class ReturnVoidAction {
- public:
-  // Allows Return() to be used in any void-returning function.
-  template <typename Result, typename ArgumentTuple>
-  static void Perform(const ArgumentTuple&) {
-    static_assert(std::is_void<Result>::value, "Result should be void.");
-  }
-};
-
-// Implements the polymorphic ReturnRef(x) action, which can be used
-// in any function that returns a reference to the type of x,
-// regardless of the argument types.
-template <typename T>
-class ReturnRefAction {
- public:
-  // Constructs a ReturnRefAction object from the reference to be returned.
-  explicit ReturnRefAction(T& ref) : ref_(ref) {}  // NOLINT
-
-  // This template type conversion operator allows ReturnRef(x) to be
-  // used in ANY function that returns a reference to x's type.
-  template <typename F>
-  operator Action<F>() const {
-    typedef typename Function<F>::Result Result;
-    // Asserts that the function return type is a reference.  This
-    // catches the user error of using ReturnRef(x) when Return(x)
-    // should be used, and generates some helpful error message.
-    GTEST_COMPILE_ASSERT_(std::is_reference<Result>::value,
-                          use_Return_instead_of_ReturnRef_to_return_a_value);
-    return Action<F>(new Impl<F>(ref_));
-  }
-
- private:
-  // Implements the ReturnRef(x) action for a particular function type F.
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(T& ref) : ref_(ref) {}  // NOLINT
-
-    Result Perform(const ArgumentTuple&) override { return ref_; }
-
-   private:
-    T& ref_;
-  };
-
-  T& ref_;
-};
-
-// Implements the polymorphic ReturnRefOfCopy(x) action, which can be
-// used in any function that returns a reference to the type of x,
-// regardless of the argument types.
-template <typename T>
-class ReturnRefOfCopyAction {
- public:
-  // Constructs a ReturnRefOfCopyAction object from the reference to
-  // be returned.
-  explicit ReturnRefOfCopyAction(const T& value) : value_(value) {}  // NOLINT
-
-  // This template type conversion operator allows ReturnRefOfCopy(x) to be
-  // used in ANY function that returns a reference to x's type.
-  template <typename F>
-  operator Action<F>() const {
-    typedef typename Function<F>::Result Result;
-    // Asserts that the function return type is a reference.  This
-    // catches the user error of using ReturnRefOfCopy(x) when Return(x)
-    // should be used, and generates some helpful error message.
-    GTEST_COMPILE_ASSERT_(
-        std::is_reference<Result>::value,
-        use_Return_instead_of_ReturnRefOfCopy_to_return_a_value);
-    return Action<F>(new Impl<F>(value_));
-  }
-
- private:
-  // Implements the ReturnRefOfCopy(x) action for a particular function type F.
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(const T& value) : value_(value) {}  // NOLINT
-
-    Result Perform(const ArgumentTuple&) override { return value_; }
-
-   private:
-    T value_;
-  };
-
-  const T value_;
-};
-
-// Implements the polymorphic ReturnRoundRobin(v) action, which can be
-// used in any function that returns the element_type of v.
-template <typename T>
-class ReturnRoundRobinAction {
- public:
-  explicit ReturnRoundRobinAction(std::vector<T> values) {
-    GTEST_CHECK_(!values.empty())
-        << "ReturnRoundRobin requires at least one element.";
-    state_->values = std::move(values);
-  }
-
-  template <typename... Args>
-  T operator()(Args&&...) const {
-     return state_->Next();
-  }
-
- private:
-  struct State {
-    T Next() {
-      T ret_val = values[i++];
-      if (i == values.size()) i = 0;
-      return ret_val;
-    }
-
-    std::vector<T> values;
-    size_t i = 0;
-  };
-  std::shared_ptr<State> state_ = std::make_shared<State>();
-};
-
-// Implements the polymorphic DoDefault() action.
-class DoDefaultAction {
- public:
-  // This template type conversion operator allows DoDefault() to be
-  // used in any function.
-  template <typename F>
-  operator Action<F>() const { return Action<F>(); }  // NOLINT
-};
-
-// Implements the Assign action to set a given pointer referent to a
-// particular value.
-template <typename T1, typename T2>
-class AssignAction {
- public:
-  AssignAction(T1* ptr, T2 value) : ptr_(ptr), value_(value) {}
-
-  template <typename Result, typename ArgumentTuple>
-  void Perform(const ArgumentTuple& /* args */) const {
-    *ptr_ = value_;
-  }
-
- private:
-  T1* const ptr_;
-  const T2 value_;
-};
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-// Implements the SetErrnoAndReturn action to simulate return from
-// various system calls and libc functions.
-template <typename T>
-class SetErrnoAndReturnAction {
- public:
-  SetErrnoAndReturnAction(int errno_value, T result)
-      : errno_(errno_value),
-        result_(result) {}
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& /* args */) const {
-    errno = errno_;
-    return result_;
-  }
-
- private:
-  const int errno_;
-  const T result_;
-};
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Implements the SetArgumentPointee<N>(x) action for any function
-// whose N-th argument (0-based) is a pointer to x's type.
-template <size_t N, typename A, typename = void>
-struct SetArgumentPointeeAction {
-  A value;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    *::std::get<N>(std::tie(args...)) = value;
-  }
-};
-
-// Implements the Invoke(object_ptr, &Class::Method) action.
-template <class Class, typename MethodPtr>
-struct InvokeMethodAction {
-  Class* const obj_ptr;
-  const MethodPtr method_ptr;
-
-  template <typename... Args>
-  auto operator()(Args&&... args) const
-      -> decltype((obj_ptr->*method_ptr)(std::forward<Args>(args)...)) {
-    return (obj_ptr->*method_ptr)(std::forward<Args>(args)...);
-  }
-};
-
-// Implements the InvokeWithoutArgs(f) action.  The template argument
-// FunctionImpl is the implementation type of f, which can be either a
-// function pointer or a functor.  InvokeWithoutArgs(f) can be used as an
-// Action<F> as long as f's type is compatible with F.
-template <typename FunctionImpl>
-struct InvokeWithoutArgsAction {
-  FunctionImpl function_impl;
-
-  // Allows InvokeWithoutArgs(f) to be used as any action whose type is
-  // compatible with f.
-  template <typename... Args>
-  auto operator()(const Args&...) -> decltype(function_impl()) {
-    return function_impl();
-  }
-};
-
-// Implements the InvokeWithoutArgs(object_ptr, &Class::Method) action.
-template <class Class, typename MethodPtr>
-struct InvokeMethodWithoutArgsAction {
-  Class* const obj_ptr;
-  const MethodPtr method_ptr;
-
-  using ReturnType =
-      decltype((std::declval<Class*>()->*std::declval<MethodPtr>())());
-
-  template <typename... Args>
-  ReturnType operator()(const Args&...) const {
-    return (obj_ptr->*method_ptr)();
-  }
-};
-
-// Implements the IgnoreResult(action) action.
-template <typename A>
-class IgnoreResultAction {
- public:
-  explicit IgnoreResultAction(const A& action) : action_(action) {}
-
-  template <typename F>
-  operator Action<F>() const {
-    // Assert statement belongs here because this is the best place to verify
-    // conditions on F. It produces the clearest error messages
-    // in most compilers.
-    // Impl really belongs in this scope as a local class but can't
-    // because MSVC produces duplicate symbols in different translation units
-    // in this case. Until MS fixes that bug we put Impl into the class scope
-    // and put the typedef both here (for use in assert statement) and
-    // in the Impl class. But both definitions must be the same.
-    typedef typename internal::Function<F>::Result Result;
-
-    // Asserts at compile time that F returns void.
-    static_assert(std::is_void<Result>::value, "Result type should be void.");
-
-    return Action<F>(new Impl<F>(action_));
-  }
-
- private:
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename internal::Function<F>::Result Result;
-    typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(const A& action) : action_(action) {}
-
-    void Perform(const ArgumentTuple& args) override {
-      // Performs the action and ignores its result.
-      action_.Perform(args);
-    }
-
-   private:
-    // Type OriginalFunction is the same as F except that its return
-    // type is IgnoredValue.
-    typedef typename internal::Function<F>::MakeResultIgnoredValue
-        OriginalFunction;
-
-    const Action<OriginalFunction> action_;
-  };
-
-  const A action_;
-};
-
-template <typename InnerAction, size_t... I>
-struct WithArgsAction {
-  InnerAction action;
-
-  // The inner action could be anything convertible to Action<X>.
-  // We use the conversion operator to detect the signature of the inner Action.
-  template <typename R, typename... Args>
-  operator Action<R(Args...)>() const {  // NOLINT
-    using TupleType = std::tuple<Args...>;
-    Action<R(typename std::tuple_element<I, TupleType>::type...)>
-        converted(action);
-
-    return [converted](Args... args) -> R {
-      return converted.Perform(std::forward_as_tuple(
-        std::get<I>(std::forward_as_tuple(std::forward<Args>(args)...))...));
-    };
-  }
-};
-
-template <typename... Actions>
-struct DoAllAction {
- private:
-  template <typename T>
-  using NonFinalType =
-      typename std::conditional<std::is_scalar<T>::value, T, const T&>::type;
-
-  template <typename ActionT, size_t... I>
-  std::vector<ActionT> Convert(IndexSequence<I...>) const {
-    return {ActionT(std::get<I>(actions))...};
-  }
-
- public:
-  std::tuple<Actions...> actions;
-
-  template <typename R, typename... Args>
-  operator Action<R(Args...)>() const {  // NOLINT
-    struct Op {
-      std::vector<Action<void(NonFinalType<Args>...)>> converted;
-      Action<R(Args...)> last;
-      R operator()(Args... args) const {
-        auto tuple_args = std::forward_as_tuple(std::forward<Args>(args)...);
-        for (auto& a : converted) {
-          a.Perform(tuple_args);
-        }
-        return last.Perform(std::move(tuple_args));
-      }
-    };
-    return Op{Convert<Action<void(NonFinalType<Args>...)>>(
-                  MakeIndexSequence<sizeof...(Actions) - 1>()),
-              std::get<sizeof...(Actions) - 1>(actions)};
-  }
-};
-
-template <typename T, typename... Params>
-struct ReturnNewAction {
-  T* operator()() const {
-    return internal::Apply(
-        [](const Params&... unpacked_params) {
-          return new T(unpacked_params...);
-        },
-        params);
-  }
-  std::tuple<Params...> params;
-};
-
-template <size_t k>
-struct ReturnArgAction {
-  template <typename... Args>
-  auto operator()(const Args&... args) const ->
-      typename std::tuple_element<k, std::tuple<Args...>>::type {
-    return std::get<k>(std::tie(args...));
-  }
-};
-
-template <size_t k, typename Ptr>
-struct SaveArgAction {
-  Ptr pointer;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    *pointer = std::get<k>(std::tie(args...));
-  }
-};
-
-template <size_t k, typename Ptr>
-struct SaveArgPointeeAction {
-  Ptr pointer;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    *pointer = *std::get<k>(std::tie(args...));
-  }
-};
-
-template <size_t k, typename T>
-struct SetArgRefereeAction {
-  T value;
-
-  template <typename... Args>
-  void operator()(Args&&... args) const {
-    using argk_type =
-        typename ::std::tuple_element<k, std::tuple<Args...>>::type;
-    static_assert(std::is_lvalue_reference<argk_type>::value,
-                  "Argument must be a reference type.");
-    std::get<k>(std::tie(args...)) = value;
-  }
-};
-
-template <size_t k, typename I1, typename I2>
-struct SetArrayArgumentAction {
-  I1 first;
-  I2 last;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    auto value = std::get<k>(std::tie(args...));
-    for (auto it = first; it != last; ++it, (void)++value) {
-      *value = *it;
-    }
-  }
-};
-
-template <size_t k>
-struct DeleteArgAction {
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    delete std::get<k>(std::tie(args...));
-  }
-};
-
-template <typename Ptr>
-struct ReturnPointeeAction {
-  Ptr pointer;
-  template <typename... Args>
-  auto operator()(const Args&...) const -> decltype(*pointer) {
-    return *pointer;
-  }
-};
-
-#if GTEST_HAS_EXCEPTIONS
-template <typename T>
-struct ThrowAction {
-  T exception;
-  // We use a conversion operator to adapt to any return type.
-  template <typename R, typename... Args>
-  operator Action<R(Args...)>() const {  // NOLINT
-    T copy = exception;
-    return [copy](Args...) -> R { throw copy; };
-  }
-};
-#endif  // GTEST_HAS_EXCEPTIONS
-
-}  // namespace internal
-
-// An Unused object can be implicitly constructed from ANY value.
-// This is handy when defining actions that ignore some or all of the
-// mock function arguments.  For example, given
-//
-//   MOCK_METHOD3(Foo, double(const string& label, double x, double y));
-//   MOCK_METHOD3(Bar, double(int index, double x, double y));
-//
-// instead of
-//
-//   double DistanceToOriginWithLabel(const string& label, double x, double y) {
-//     return sqrt(x*x + y*y);
-//   }
-//   double DistanceToOriginWithIndex(int index, double x, double y) {
-//     return sqrt(x*x + y*y);
-//   }
-//   ...
-//   EXPECT_CALL(mock, Foo("abc", _, _))
-//       .WillOnce(Invoke(DistanceToOriginWithLabel));
-//   EXPECT_CALL(mock, Bar(5, _, _))
-//       .WillOnce(Invoke(DistanceToOriginWithIndex));
-//
-// you could write
-//
-//   // We can declare any uninteresting argument as Unused.
-//   double DistanceToOrigin(Unused, double x, double y) {
-//     return sqrt(x*x + y*y);
-//   }
-//   ...
-//   EXPECT_CALL(mock, Foo("abc", _, _)).WillOnce(Invoke(DistanceToOrigin));
-//   EXPECT_CALL(mock, Bar(5, _, _)).WillOnce(Invoke(DistanceToOrigin));
-typedef internal::IgnoredValue Unused;
-
-// Creates an action that does actions a1, a2, ..., sequentially in
-// each invocation. All but the last action will have a readonly view of the
-// arguments.
-template <typename... Action>
-internal::DoAllAction<typename std::decay<Action>::type...> DoAll(
-    Action&&... action) {
-  return {std::forward_as_tuple(std::forward<Action>(action)...)};
-}
-
-// WithArg<k>(an_action) creates an action that passes the k-th
-// (0-based) argument of the mock function to an_action and performs
-// it.  It adapts an action accepting one argument to one that accepts
-// multiple arguments.  For convenience, we also provide
-// WithArgs<k>(an_action) (defined below) as a synonym.
-template <size_t k, typename InnerAction>
-internal::WithArgsAction<typename std::decay<InnerAction>::type, k>
-WithArg(InnerAction&& action) {
-  return {std::forward<InnerAction>(action)};
-}
-
-// WithArgs<N1, N2, ..., Nk>(an_action) creates an action that passes
-// the selected arguments of the mock function to an_action and
-// performs it.  It serves as an adaptor between actions with
-// different argument lists.
-template <size_t k, size_t... ks, typename InnerAction>
-internal::WithArgsAction<typename std::decay<InnerAction>::type, k, ks...>
-WithArgs(InnerAction&& action) {
-  return {std::forward<InnerAction>(action)};
-}
-
-// WithoutArgs(inner_action) can be used in a mock function with a
-// non-empty argument list to perform inner_action, which takes no
-// argument.  In other words, it adapts an action accepting no
-// argument to one that accepts (and ignores) arguments.
-template <typename InnerAction>
-internal::WithArgsAction<typename std::decay<InnerAction>::type>
-WithoutArgs(InnerAction&& action) {
-  return {std::forward<InnerAction>(action)};
-}
-
-// Creates an action that returns 'value'.  'value' is passed by value
-// instead of const reference - otherwise Return("string literal")
-// will trigger a compiler error about using array as initializer.
-template <typename R>
-internal::ReturnAction<R> Return(R value) {
-  return internal::ReturnAction<R>(std::move(value));
-}
-
-// Creates an action that returns NULL.
-inline PolymorphicAction<internal::ReturnNullAction> ReturnNull() {
-  return MakePolymorphicAction(internal::ReturnNullAction());
-}
-
-// Creates an action that returns from a void function.
-inline PolymorphicAction<internal::ReturnVoidAction> Return() {
-  return MakePolymorphicAction(internal::ReturnVoidAction());
-}
-
-// Creates an action that returns the reference to a variable.
-template <typename R>
-inline internal::ReturnRefAction<R> ReturnRef(R& x) {  // NOLINT
-  return internal::ReturnRefAction<R>(x);
-}
-
-// Prevent using ReturnRef on reference to temporary.
-template <typename R, R* = nullptr>
-internal::ReturnRefAction<R> ReturnRef(R&&) = delete;
-
-// Creates an action that returns the reference to a copy of the
-// argument.  The copy is created when the action is constructed and
-// lives as long as the action.
-template <typename R>
-inline internal::ReturnRefOfCopyAction<R> ReturnRefOfCopy(const R& x) {
-  return internal::ReturnRefOfCopyAction<R>(x);
-}
-
-// Modifies the parent action (a Return() action) to perform a move of the
-// argument instead of a copy.
-// Return(ByMove()) actions can only be executed once and will assert this
-// invariant.
-template <typename R>
-internal::ByMoveWrapper<R> ByMove(R x) {
-  return internal::ByMoveWrapper<R>(std::move(x));
-}
-
-// Creates an action that returns an element of `vals`. Calling this action will
-// repeatedly return the next value from `vals` until it reaches the end and
-// will restart from the beginning.
-template <typename T>
-internal::ReturnRoundRobinAction<T> ReturnRoundRobin(std::vector<T> vals) {
-  return internal::ReturnRoundRobinAction<T>(std::move(vals));
-}
-
-// Creates an action that returns an element of `vals`. Calling this action will
-// repeatedly return the next value from `vals` until it reaches the end and
-// will restart from the beginning.
-template <typename T>
-internal::ReturnRoundRobinAction<T> ReturnRoundRobin(
-    std::initializer_list<T> vals) {
-  return internal::ReturnRoundRobinAction<T>(std::vector<T>(vals));
-}
-
-// Creates an action that does the default action for the give mock function.
-inline internal::DoDefaultAction DoDefault() {
-  return internal::DoDefaultAction();
-}
-
-// Creates an action that sets the variable pointed by the N-th
-// (0-based) function argument to 'value'.
-template <size_t N, typename T>
-internal::SetArgumentPointeeAction<N, T> SetArgPointee(T value) {
-  return {std::move(value)};
-}
-
-// The following version is DEPRECATED.
-template <size_t N, typename T>
-internal::SetArgumentPointeeAction<N, T> SetArgumentPointee(T value) {
-  return {std::move(value)};
-}
-
-// Creates an action that sets a pointer referent to a given value.
-template <typename T1, typename T2>
-PolymorphicAction<internal::AssignAction<T1, T2> > Assign(T1* ptr, T2 val) {
-  return MakePolymorphicAction(internal::AssignAction<T1, T2>(ptr, val));
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-// Creates an action that sets errno and returns the appropriate error.
-template <typename T>
-PolymorphicAction<internal::SetErrnoAndReturnAction<T> >
-SetErrnoAndReturn(int errval, T result) {
-  return MakePolymorphicAction(
-      internal::SetErrnoAndReturnAction<T>(errval, result));
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Various overloads for Invoke().
-
-// Legacy function.
-// Actions can now be implicitly constructed from callables. No need to create
-// wrapper objects.
-// This function exists for backwards compatibility.
-template <typename FunctionImpl>
-typename std::decay<FunctionImpl>::type Invoke(FunctionImpl&& function_impl) {
-  return std::forward<FunctionImpl>(function_impl);
-}
-
-// Creates an action that invokes the given method on the given object
-// with the mock function's arguments.
-template <class Class, typename MethodPtr>
-internal::InvokeMethodAction<Class, MethodPtr> Invoke(Class* obj_ptr,
-                                                      MethodPtr method_ptr) {
-  return {obj_ptr, method_ptr};
-}
-
-// Creates an action that invokes 'function_impl' with no argument.
-template <typename FunctionImpl>
-internal::InvokeWithoutArgsAction<typename std::decay<FunctionImpl>::type>
-InvokeWithoutArgs(FunctionImpl function_impl) {
-  return {std::move(function_impl)};
-}
-
-// Creates an action that invokes the given method on the given object
-// with no argument.
-template <class Class, typename MethodPtr>
-internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> InvokeWithoutArgs(
-    Class* obj_ptr, MethodPtr method_ptr) {
-  return {obj_ptr, method_ptr};
-}
-
-// Creates an action that performs an_action and throws away its
-// result.  In other words, it changes the return type of an_action to
-// void.  an_action MUST NOT return void, or the code won't compile.
-template <typename A>
-inline internal::IgnoreResultAction<A> IgnoreResult(const A& an_action) {
-  return internal::IgnoreResultAction<A>(an_action);
-}
-
-// Creates a reference wrapper for the given L-value.  If necessary,
-// you can explicitly specify the type of the reference.  For example,
-// suppose 'derived' is an object of type Derived, ByRef(derived)
-// would wrap a Derived&.  If you want to wrap a const Base& instead,
-// where Base is a base class of Derived, just write:
-//
-//   ByRef<const Base>(derived)
-//
-// N.B. ByRef is redundant with std::ref, std::cref and std::reference_wrapper.
-// However, it may still be used for consistency with ByMove().
-template <typename T>
-inline ::std::reference_wrapper<T> ByRef(T& l_value) {  // NOLINT
-  return ::std::reference_wrapper<T>(l_value);
-}
-
-// The ReturnNew<T>(a1, a2, ..., a_k) action returns a pointer to a new
-// instance of type T, constructed on the heap with constructor arguments
-// a1, a2, ..., and a_k. The caller assumes ownership of the returned value.
-template <typename T, typename... Params>
-internal::ReturnNewAction<T, typename std::decay<Params>::type...> ReturnNew(
-    Params&&... params) {
-  return {std::forward_as_tuple(std::forward<Params>(params)...)};
-}
-
-// Action ReturnArg<k>() returns the k-th argument of the mock function.
-template <size_t k>
-internal::ReturnArgAction<k> ReturnArg() {
-  return {};
-}
-
-// Action SaveArg<k>(pointer) saves the k-th (0-based) argument of the
-// mock function to *pointer.
-template <size_t k, typename Ptr>
-internal::SaveArgAction<k, Ptr> SaveArg(Ptr pointer) {
-  return {pointer};
-}
-
-// Action SaveArgPointee<k>(pointer) saves the value pointed to
-// by the k-th (0-based) argument of the mock function to *pointer.
-template <size_t k, typename Ptr>
-internal::SaveArgPointeeAction<k, Ptr> SaveArgPointee(Ptr pointer) {
-  return {pointer};
-}
-
-// Action SetArgReferee<k>(value) assigns 'value' to the variable
-// referenced by the k-th (0-based) argument of the mock function.
-template <size_t k, typename T>
-internal::SetArgRefereeAction<k, typename std::decay<T>::type> SetArgReferee(
-    T&& value) {
-  return {std::forward<T>(value)};
-}
-
-// Action SetArrayArgument<k>(first, last) copies the elements in
-// source range [first, last) to the array pointed to by the k-th
-// (0-based) argument, which can be either a pointer or an
-// iterator. The action does not take ownership of the elements in the
-// source range.
-template <size_t k, typename I1, typename I2>
-internal::SetArrayArgumentAction<k, I1, I2> SetArrayArgument(I1 first,
-                                                             I2 last) {
-  return {first, last};
-}
-
-// Action DeleteArg<k>() deletes the k-th (0-based) argument of the mock
-// function.
-template <size_t k>
-internal::DeleteArgAction<k> DeleteArg() {
-  return {};
-}
-
-// This action returns the value pointed to by 'pointer'.
-template <typename Ptr>
-internal::ReturnPointeeAction<Ptr> ReturnPointee(Ptr pointer) {
-  return {pointer};
-}
-
-// Action Throw(exception) can be used in a mock function of any type
-// to throw the given exception.  Any copyable value can be thrown.
-#if GTEST_HAS_EXCEPTIONS
-template <typename T>
-internal::ThrowAction<typename std::decay<T>::type> Throw(T&& exception) {
-  return {std::forward<T>(exception)};
-}
-#endif  // GTEST_HAS_EXCEPTIONS
-
-namespace internal {
-
-// A macro from the ACTION* family (defined later in gmock-generated-actions.h)
-// defines an action that can be used in a mock function.  Typically,
-// these actions only care about a subset of the arguments of the mock
-// function.  For example, if such an action only uses the second
-// argument, it can be used in any mock function that takes >= 2
-// arguments where the type of the second argument is compatible.
-//
-// Therefore, the action implementation must be prepared to take more
-// arguments than it needs.  The ExcessiveArg type is used to
-// represent those excessive arguments.  In order to keep the compiler
-// error messages tractable, we define it in the testing namespace
-// instead of testing::internal.  However, this is an INTERNAL TYPE
-// and subject to change without notice, so a user MUST NOT USE THIS
-// TYPE DIRECTLY.
-struct ExcessiveArg {};
-
-// Builds an implementation of an Action<> for some particular signature, using
-// a class defined by an ACTION* macro.
-template <typename F, typename Impl> struct ActionImpl;
-
-template <typename Impl>
-struct ImplBase {
-  struct Holder {
-    // Allows each copy of the Action<> to get to the Impl.
-    explicit operator const Impl&() const { return *ptr; }
-    std::shared_ptr<Impl> ptr;
-  };
-  using type = typename std::conditional<std::is_constructible<Impl>::value,
-                                         Impl, Holder>::type;
-};
-
-template <typename R, typename... Args, typename Impl>
-struct ActionImpl<R(Args...), Impl> : ImplBase<Impl>::type {
-  using Base = typename ImplBase<Impl>::type;
-  using function_type = R(Args...);
-  using args_type = std::tuple<Args...>;
-
-  ActionImpl() = default;  // Only defined if appropriate for Base.
-  explicit ActionImpl(std::shared_ptr<Impl> impl) : Base{std::move(impl)} { }
-
-  R operator()(Args&&... arg) const {
-    static constexpr size_t kMaxArgs =
-        sizeof...(Args) <= 10 ? sizeof...(Args) : 10;
-    return Apply(MakeIndexSequence<kMaxArgs>{},
-                 MakeIndexSequence<10 - kMaxArgs>{},
-                 args_type{std::forward<Args>(arg)...});
-  }
-
-  template <std::size_t... arg_id, std::size_t... excess_id>
-  R Apply(IndexSequence<arg_id...>, IndexSequence<excess_id...>,
-          const args_type& args) const {
-    // Impl need not be specific to the signature of action being implemented;
-    // only the implementing function body needs to have all of the specific
-    // types instantiated.  Up to 10 of the args that are provided by the
-    // args_type get passed, followed by a dummy of unspecified type for the
-    // remainder up to 10 explicit args.
-    static constexpr ExcessiveArg kExcessArg{};
-    return static_cast<const Impl&>(*this).template gmock_PerformImpl<
-        /*function_type=*/function_type, /*return_type=*/R,
-        /*args_type=*/args_type,
-        /*argN_type=*/typename std::tuple_element<arg_id, args_type>::type...>(
-        /*args=*/args, std::get<arg_id>(args)...,
-        ((void)excess_id, kExcessArg)...);
-  }
-};
-
-// Stores a default-constructed Impl as part of the Action<>'s
-// std::function<>. The Impl should be trivial to copy.
-template <typename F, typename Impl>
-::testing::Action<F> MakeAction() {
-  return ::testing::Action<F>(ActionImpl<F, Impl>());
-}
-
-// Stores just the one given instance of Impl.
-template <typename F, typename Impl>
-::testing::Action<F> MakeAction(std::shared_ptr<Impl> impl) {
-  return ::testing::Action<F>(ActionImpl<F, Impl>(std::move(impl)));
-}
-
-#define GMOCK_INTERNAL_ARG_UNUSED(i, data, el) \
-  , const arg##i##_type& arg##i GTEST_ATTRIBUTE_UNUSED_
-#define GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_           \
-  const args_type& args GTEST_ATTRIBUTE_UNUSED_ GMOCK_PP_REPEAT( \
-      GMOCK_INTERNAL_ARG_UNUSED, , 10)
-
-#define GMOCK_INTERNAL_ARG(i, data, el) , const arg##i##_type& arg##i
-#define GMOCK_ACTION_ARG_TYPES_AND_NAMES_ \
-  const args_type& args GMOCK_PP_REPEAT(GMOCK_INTERNAL_ARG, , 10)
-
-#define GMOCK_INTERNAL_TEMPLATE_ARG(i, data, el) , typename arg##i##_type
-#define GMOCK_ACTION_TEMPLATE_ARGS_NAMES_ \
-  GMOCK_PP_TAIL(GMOCK_PP_REPEAT(GMOCK_INTERNAL_TEMPLATE_ARG, , 10))
-
-#define GMOCK_INTERNAL_TYPENAME_PARAM(i, data, param) , typename param##_type
-#define GMOCK_ACTION_TYPENAME_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPENAME_PARAM, , params))
-
-#define GMOCK_INTERNAL_TYPE_PARAM(i, data, param) , param##_type
-#define GMOCK_ACTION_TYPE_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPE_PARAM, , params))
-
-#define GMOCK_INTERNAL_TYPE_GVALUE_PARAM(i, data, param) \
-  , param##_type gmock_p##i
-#define GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPE_GVALUE_PARAM, , params))
-
-#define GMOCK_INTERNAL_GVALUE_PARAM(i, data, param) \
-  , std::forward<param##_type>(gmock_p##i)
-#define GMOCK_ACTION_GVALUE_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GVALUE_PARAM, , params))
-
-#define GMOCK_INTERNAL_INIT_PARAM(i, data, param) \
-  , param(::std::forward<param##_type>(gmock_p##i))
-#define GMOCK_ACTION_INIT_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_INIT_PARAM, , params))
-
-#define GMOCK_INTERNAL_FIELD_PARAM(i, data, param) param##_type param;
-#define GMOCK_ACTION_FIELD_PARAMS_(params) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_FIELD_PARAM, , params)
-
-#define GMOCK_INTERNAL_ACTION(name, full_name, params)                        \
-  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
-  class full_name {                                                           \
-   public:                                                                    \
-    explicit full_name(GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params))              \
-        : impl_(std::make_shared<gmock_Impl>(                                 \
-                GMOCK_ACTION_GVALUE_PARAMS_(params))) { }                     \
-    full_name(const full_name&) = default;                                    \
-    full_name(full_name&&) noexcept = default;                                \
-    template <typename F>                                                     \
-    operator ::testing::Action<F>() const {                                   \
-      return ::testing::internal::MakeAction<F>(impl_);                       \
-    }                                                                         \
-   private:                                                                   \
-    class gmock_Impl {                                                        \
-     public:                                                                  \
-      explicit gmock_Impl(GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params))           \
-          : GMOCK_ACTION_INIT_PARAMS_(params) {}                              \
-      template <typename function_type, typename return_type,                 \
-                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>        \
-      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const; \
-      GMOCK_ACTION_FIELD_PARAMS_(params)                                      \
-    };                                                                        \
-    std::shared_ptr<const gmock_Impl> impl_;                                  \
-  };                                                                          \
-  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
-  inline full_name<GMOCK_ACTION_TYPE_PARAMS_(params)> name(                   \
-      GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params)) {                             \
-    return full_name<GMOCK_ACTION_TYPE_PARAMS_(params)>(                      \
-        GMOCK_ACTION_GVALUE_PARAMS_(params));                                 \
-  }                                                                           \
-  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
-  template <typename function_type, typename return_type, typename args_type, \
-            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                \
-  return_type full_name<GMOCK_ACTION_TYPE_PARAMS_(params)>::gmock_Impl::      \
-  gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
-
-}  // namespace internal
-
-// Similar to GMOCK_INTERNAL_ACTION, but no bound parameters are stored.
-#define ACTION(name)                                                          \
-  class name##Action {                                                        \
-   public:                                                                    \
-   explicit name##Action() noexcept {}                                        \
-   name##Action(const name##Action&) noexcept {}                              \
-    template <typename F>                                                     \
-    operator ::testing::Action<F>() const {                                   \
-      return ::testing::internal::MakeAction<F, gmock_Impl>();                \
-    }                                                                         \
-   private:                                                                   \
-    class gmock_Impl {                                                        \
-     public:                                                                  \
-      template <typename function_type, typename return_type,                 \
-                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>        \
-      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const; \
-    };                                                                        \
-  };                                                                          \
-  inline name##Action name() GTEST_MUST_USE_RESULT_;                          \
-  inline name##Action name() { return name##Action(); }                       \
-  template <typename function_type, typename return_type, typename args_type, \
-            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                \
-  return_type name##Action::gmock_Impl::gmock_PerformImpl(                    \
-      GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
-
-#define ACTION_P(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP, (__VA_ARGS__))
-
-#define ACTION_P2(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP2, (__VA_ARGS__))
-
-#define ACTION_P3(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP3, (__VA_ARGS__))
-
-#define ACTION_P4(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP4, (__VA_ARGS__))
-
-#define ACTION_P5(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP5, (__VA_ARGS__))
-
-#define ACTION_P6(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP6, (__VA_ARGS__))
-
-#define ACTION_P7(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP7, (__VA_ARGS__))
-
-#define ACTION_P8(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP8, (__VA_ARGS__))
-
-#define ACTION_P9(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP9, (__VA_ARGS__))
-
-#define ACTION_P10(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP10, (__VA_ARGS__))
-
-}  // namespace testing
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-cardinalities.h b/third_party/googletest/googlemock/include/gmock/gmock-cardinalities.h
deleted file mode 100644
index fc7f803..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-cardinalities.h
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements some commonly used cardinalities.  More
-// cardinalities can be defined by the user implementing the
-// CardinalityInterface interface if necessary.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
-
-#include <limits.h>
-#include <memory>
-#include <ostream>  // NOLINT
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// To implement a cardinality Foo, define:
-//   1. a class FooCardinality that implements the
-//      CardinalityInterface interface, and
-//   2. a factory function that creates a Cardinality object from a
-//      const FooCardinality*.
-//
-// The two-level delegation design follows that of Matcher, providing
-// consistency for extension developers.  It also eases ownership
-// management as Cardinality objects can now be copied like plain values.
-
-// The implementation of a cardinality.
-class CardinalityInterface {
- public:
-  virtual ~CardinalityInterface() {}
-
-  // Conservative estimate on the lower/upper bound of the number of
-  // calls allowed.
-  virtual int ConservativeLowerBound() const { return 0; }
-  virtual int ConservativeUpperBound() const { return INT_MAX; }
-
-  // Returns true if and only if call_count calls will satisfy this
-  // cardinality.
-  virtual bool IsSatisfiedByCallCount(int call_count) const = 0;
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  virtual bool IsSaturatedByCallCount(int call_count) const = 0;
-
-  // Describes self to an ostream.
-  virtual void DescribeTo(::std::ostream* os) const = 0;
-};
-
-// A Cardinality is a copyable and IMMUTABLE (except by assignment)
-// object that specifies how many times a mock function is expected to
-// be called.  The implementation of Cardinality is just a std::shared_ptr
-// to const CardinalityInterface. Don't inherit from Cardinality!
-class GTEST_API_ Cardinality {
- public:
-  // Constructs a null cardinality.  Needed for storing Cardinality
-  // objects in STL containers.
-  Cardinality() {}
-
-  // Constructs a Cardinality from its implementation.
-  explicit Cardinality(const CardinalityInterface* impl) : impl_(impl) {}
-
-  // Conservative estimate on the lower/upper bound of the number of
-  // calls allowed.
-  int ConservativeLowerBound() const { return impl_->ConservativeLowerBound(); }
-  int ConservativeUpperBound() const { return impl_->ConservativeUpperBound(); }
-
-  // Returns true if and only if call_count calls will satisfy this
-  // cardinality.
-  bool IsSatisfiedByCallCount(int call_count) const {
-    return impl_->IsSatisfiedByCallCount(call_count);
-  }
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  bool IsSaturatedByCallCount(int call_count) const {
-    return impl_->IsSaturatedByCallCount(call_count);
-  }
-
-  // Returns true if and only if call_count calls will over-saturate this
-  // cardinality, i.e. exceed the maximum number of allowed calls.
-  bool IsOverSaturatedByCallCount(int call_count) const {
-    return impl_->IsSaturatedByCallCount(call_count) &&
-        !impl_->IsSatisfiedByCallCount(call_count);
-  }
-
-  // Describes self to an ostream
-  void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
-
-  // Describes the given actual call count to an ostream.
-  static void DescribeActualCallCountTo(int actual_call_count,
-                                        ::std::ostream* os);
-
- private:
-  std::shared_ptr<const CardinalityInterface> impl_;
-};
-
-// Creates a cardinality that allows at least n calls.
-GTEST_API_ Cardinality AtLeast(int n);
-
-// Creates a cardinality that allows at most n calls.
-GTEST_API_ Cardinality AtMost(int n);
-
-// Creates a cardinality that allows any number of calls.
-GTEST_API_ Cardinality AnyNumber();
-
-// Creates a cardinality that allows between min and max calls.
-GTEST_API_ Cardinality Between(int min, int max);
-
-// Creates a cardinality that allows exactly n calls.
-GTEST_API_ Cardinality Exactly(int n);
-
-// Creates a cardinality from its implementation.
-inline Cardinality MakeCardinality(const CardinalityInterface* c) {
-  return Cardinality(c);
-}
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-function-mocker.h b/third_party/googletest/googlemock/include/gmock/gmock-function-mocker.h
deleted file mode 100644
index 0fc6f6f..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-function-mocker.h
+++ /dev/null
@@ -1,479 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements MOCK_METHOD.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_  // NOLINT
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_  // NOLINT
-
-#include <type_traits>  // IWYU pragma: keep
-#include <utility>      // IWYU pragma: keep
-
-#include "gmock/gmock-spec-builders.h"
-#include "gmock/internal/gmock-internal-utils.h"
-#include "gmock/internal/gmock-pp.h"
-
-namespace testing {
-namespace internal {
-template <typename T>
-using identity_t = T;
-
-template <typename Pattern>
-struct ThisRefAdjuster {
-  template <typename T>
-  using AdjustT = typename std::conditional<
-      std::is_const<typename std::remove_reference<Pattern>::type>::value,
-      typename std::conditional<std::is_lvalue_reference<Pattern>::value,
-                                const T&, const T&&>::type,
-      typename std::conditional<std::is_lvalue_reference<Pattern>::value, T&,
-                                T&&>::type>::type;
-
-  template <typename MockType>
-  static AdjustT<MockType> Adjust(const MockType& mock) {
-    return static_cast<AdjustT<MockType>>(const_cast<MockType&>(mock));
-  }
-};
-
-}  // namespace internal
-
-// The style guide prohibits "using" statements in a namespace scope
-// inside a header file.  However, the FunctionMocker class template
-// is meant to be defined in the ::testing namespace.  The following
-// line is just a trick for working around a bug in MSVC 8.0, which
-// cannot handle it if we define FunctionMocker in ::testing.
-using internal::FunctionMocker;
-}  // namespace testing
-
-#define MOCK_METHOD(...) \
-  GMOCK_PP_VARIADIC_CALL(GMOCK_INTERNAL_MOCK_METHOD_ARG_, __VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_1(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_2(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_3(_Ret, _MethodName, _Args) \
-  GMOCK_INTERNAL_MOCK_METHOD_ARG_4(_Ret, _MethodName, _Args, ())
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_4(_Ret, _MethodName, _Args, _Spec)     \
-  GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Args);                                   \
-  GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Spec);                                   \
-  GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(                                      \
-      GMOCK_PP_NARG0 _Args, GMOCK_INTERNAL_SIGNATURE(_Ret, _Args));           \
-  GMOCK_INTERNAL_ASSERT_VALID_SPEC(_Spec)                                     \
-  GMOCK_INTERNAL_MOCK_METHOD_IMPL(                                            \
-      GMOCK_PP_NARG0 _Args, _MethodName, GMOCK_INTERNAL_HAS_CONST(_Spec),     \
-      GMOCK_INTERNAL_HAS_OVERRIDE(_Spec), GMOCK_INTERNAL_HAS_FINAL(_Spec),    \
-      GMOCK_INTERNAL_GET_NOEXCEPT_SPEC(_Spec),                                \
-      GMOCK_INTERNAL_GET_CALLTYPE(_Spec), GMOCK_INTERNAL_GET_REF_SPEC(_Spec), \
-      (GMOCK_INTERNAL_SIGNATURE(_Ret, _Args)))
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_5(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_6(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_7(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_WRONG_ARITY(...)                                      \
-  static_assert(                                                             \
-      false,                                                                 \
-      "MOCK_METHOD must be called with 3 or 4 arguments. _Ret, "             \
-      "_MethodName, _Args and optionally _Spec. _Args and _Spec must be "    \
-      "enclosed in parentheses. If _Ret is a type with unprotected commas, " \
-      "it must also be enclosed in parentheses.")
-
-#define GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Tuple) \
-  static_assert(                                  \
-      GMOCK_PP_IS_ENCLOSED_PARENS(_Tuple),        \
-      GMOCK_PP_STRINGIZE(_Tuple) " should be enclosed in parentheses.")
-
-#define GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(_N, ...)                 \
-  static_assert(                                                       \
-      std::is_function<__VA_ARGS__>::value,                            \
-      "Signature must be a function type, maybe return type contains " \
-      "unprotected comma.");                                           \
-  static_assert(                                                       \
-      ::testing::tuple_size<typename ::testing::internal::Function<    \
-              __VA_ARGS__>::ArgumentTuple>::value == _N,               \
-      "This method does not take " GMOCK_PP_STRINGIZE(                 \
-          _N) " arguments. Parenthesize all types with unprotected commas.")
-
-#define GMOCK_INTERNAL_ASSERT_VALID_SPEC(_Spec) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_ASSERT_VALID_SPEC_ELEMENT, ~, _Spec)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_IMPL(_N, _MethodName, _Constness,           \
-                                        _Override, _Final, _NoexceptSpec,      \
-                                        _CallType, _RefSpec, _Signature)       \
-  typename ::testing::internal::Function<GMOCK_PP_REMOVE_PARENS(               \
-      _Signature)>::Result                                                     \
-  GMOCK_INTERNAL_EXPAND(_CallType)                                             \
-      _MethodName(GMOCK_PP_REPEAT(GMOCK_INTERNAL_PARAMETER, _Signature, _N))   \
-          GMOCK_PP_IF(_Constness, const, ) _RefSpec _NoexceptSpec              \
-          GMOCK_PP_IF(_Override, override, ) GMOCK_PP_IF(_Final, final, ) {    \
-    GMOCK_MOCKER_(_N, _Constness, _MethodName)                                 \
-        .SetOwnerAndName(this, #_MethodName);                                  \
-    return GMOCK_MOCKER_(_N, _Constness, _MethodName)                          \
-        .Invoke(GMOCK_PP_REPEAT(GMOCK_INTERNAL_FORWARD_ARG, _Signature, _N));  \
-  }                                                                            \
-  ::testing::MockSpec<GMOCK_PP_REMOVE_PARENS(_Signature)> gmock_##_MethodName( \
-      GMOCK_PP_REPEAT(GMOCK_INTERNAL_MATCHER_PARAMETER, _Signature, _N))       \
-      GMOCK_PP_IF(_Constness, const, ) _RefSpec {                              \
-    GMOCK_MOCKER_(_N, _Constness, _MethodName).RegisterOwner(this);            \
-    return GMOCK_MOCKER_(_N, _Constness, _MethodName)                          \
-        .With(GMOCK_PP_REPEAT(GMOCK_INTERNAL_MATCHER_ARGUMENT, , _N));         \
-  }                                                                            \
-  ::testing::MockSpec<GMOCK_PP_REMOVE_PARENS(_Signature)> gmock_##_MethodName( \
-      const ::testing::internal::WithoutMatchers&,                             \
-      GMOCK_PP_IF(_Constness, const, )::testing::internal::Function<           \
-          GMOCK_PP_REMOVE_PARENS(_Signature)>*) const _RefSpec _NoexceptSpec { \
-    return ::testing::internal::ThisRefAdjuster<GMOCK_PP_IF(                   \
-        _Constness, const, ) int _RefSpec>::Adjust(*this)                      \
-        .gmock_##_MethodName(GMOCK_PP_REPEAT(                                  \
-            GMOCK_INTERNAL_A_MATCHER_ARGUMENT, _Signature, _N));               \
-  }                                                                            \
-  mutable ::testing::FunctionMocker<GMOCK_PP_REMOVE_PARENS(_Signature)>        \
-      GMOCK_MOCKER_(_N, _Constness, _MethodName)
-
-#define GMOCK_INTERNAL_EXPAND(...) __VA_ARGS__
-
-// Five Valid modifiers.
-#define GMOCK_INTERNAL_HAS_CONST(_Tuple) \
-  GMOCK_PP_HAS_COMMA(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_CONST, ~, _Tuple))
-
-#define GMOCK_INTERNAL_HAS_OVERRIDE(_Tuple) \
-  GMOCK_PP_HAS_COMMA(                       \
-      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_OVERRIDE, ~, _Tuple))
-
-#define GMOCK_INTERNAL_HAS_FINAL(_Tuple) \
-  GMOCK_PP_HAS_COMMA(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_FINAL, ~, _Tuple))
-
-#define GMOCK_INTERNAL_GET_NOEXCEPT_SPEC(_Tuple) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_NOEXCEPT_SPEC_IF_NOEXCEPT, ~, _Tuple)
-
-#define GMOCK_INTERNAL_NOEXCEPT_SPEC_IF_NOEXCEPT(_i, _, _elem)          \
-  GMOCK_PP_IF(                                                          \
-      GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem)), \
-      _elem, )
-
-#define GMOCK_INTERNAL_GET_REF_SPEC(_Tuple) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_REF_SPEC_IF_REF, ~, _Tuple)
-
-#define GMOCK_INTERNAL_REF_SPEC_IF_REF(_i, _, _elem)                       \
-  GMOCK_PP_IF(GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_REF(_i, _, _elem)), \
-              GMOCK_PP_CAT(GMOCK_INTERNAL_UNPACK_, _elem), )
-
-#define GMOCK_INTERNAL_GET_CALLTYPE(_Tuple) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GET_CALLTYPE_IMPL, ~, _Tuple)
-
-#define GMOCK_INTERNAL_ASSERT_VALID_SPEC_ELEMENT(_i, _, _elem)            \
-  static_assert(                                                          \
-      (GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_CONST(_i, _, _elem)) +    \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_OVERRIDE(_i, _, _elem)) + \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_FINAL(_i, _, _elem)) +    \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem)) + \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_REF(_i, _, _elem)) +      \
-       GMOCK_INTERNAL_IS_CALLTYPE(_elem)) == 1,                           \
-      GMOCK_PP_STRINGIZE(                                                 \
-          _elem) " cannot be recognized as a valid specification modifier.");
-
-// Modifiers implementation.
-#define GMOCK_INTERNAL_DETECT_CONST(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_CONST_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_CONST_I_const ,
-
-#define GMOCK_INTERNAL_DETECT_OVERRIDE(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_OVERRIDE_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_OVERRIDE_I_override ,
-
-#define GMOCK_INTERNAL_DETECT_FINAL(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_FINAL_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_FINAL_I_final ,
-
-#define GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_NOEXCEPT_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_NOEXCEPT_I_noexcept ,
-
-#define GMOCK_INTERNAL_DETECT_REF(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_REF_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_REF_I_ref ,
-
-#define GMOCK_INTERNAL_UNPACK_ref(x) x
-
-#define GMOCK_INTERNAL_GET_CALLTYPE_IMPL(_i, _, _elem)           \
-  GMOCK_PP_IF(GMOCK_INTERNAL_IS_CALLTYPE(_elem),                 \
-              GMOCK_INTERNAL_GET_VALUE_CALLTYPE, GMOCK_PP_EMPTY) \
-  (_elem)
-
-// TODO(iserna): GMOCK_INTERNAL_IS_CALLTYPE and
-// GMOCK_INTERNAL_GET_VALUE_CALLTYPE needed more expansions to work on windows
-// maybe they can be simplified somehow.
-#define GMOCK_INTERNAL_IS_CALLTYPE(_arg) \
-  GMOCK_INTERNAL_IS_CALLTYPE_I(          \
-      GMOCK_PP_CAT(GMOCK_INTERNAL_IS_CALLTYPE_HELPER_, _arg))
-#define GMOCK_INTERNAL_IS_CALLTYPE_I(_arg) GMOCK_PP_IS_ENCLOSED_PARENS(_arg)
-
-#define GMOCK_INTERNAL_GET_VALUE_CALLTYPE(_arg) \
-  GMOCK_INTERNAL_GET_VALUE_CALLTYPE_I(          \
-      GMOCK_PP_CAT(GMOCK_INTERNAL_IS_CALLTYPE_HELPER_, _arg))
-#define GMOCK_INTERNAL_GET_VALUE_CALLTYPE_I(_arg) \
-  GMOCK_PP_IDENTITY _arg
-
-#define GMOCK_INTERNAL_IS_CALLTYPE_HELPER_Calltype
-
-// Note: The use of `identity_t` here allows _Ret to represent return types that
-// would normally need to be specified in a different way. For example, a method
-// returning a function pointer must be written as
-//
-// fn_ptr_return_t (*method(method_args_t...))(fn_ptr_args_t...)
-//
-// But we only support placing the return type at the beginning. To handle this,
-// we wrap all calls in identity_t, so that a declaration will be expanded to
-//
-// identity_t<fn_ptr_return_t (*)(fn_ptr_args_t...)> method(method_args_t...)
-//
-// This allows us to work around the syntactic oddities of function/method
-// types.
-#define GMOCK_INTERNAL_SIGNATURE(_Ret, _Args)                                 \
-  ::testing::internal::identity_t<GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(_Ret), \
-                                              GMOCK_PP_REMOVE_PARENS,         \
-                                              GMOCK_PP_IDENTITY)(_Ret)>(      \
-      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GET_TYPE, _, _Args))
-
-#define GMOCK_INTERNAL_GET_TYPE(_i, _, _elem)                          \
-  GMOCK_PP_COMMA_IF(_i)                                                \
-  GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(_elem), GMOCK_PP_REMOVE_PARENS, \
-              GMOCK_PP_IDENTITY)                                       \
-  (_elem)
-
-#define GMOCK_INTERNAL_PARAMETER(_i, _Signature, _)            \
-  GMOCK_PP_COMMA_IF(_i)                                        \
-  GMOCK_INTERNAL_ARG_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature)) \
-  gmock_a##_i
-
-#define GMOCK_INTERNAL_FORWARD_ARG(_i, _Signature, _) \
-  GMOCK_PP_COMMA_IF(_i)                               \
-  ::std::forward<GMOCK_INTERNAL_ARG_O(                \
-      _i, GMOCK_PP_REMOVE_PARENS(_Signature))>(gmock_a##_i)
-
-#define GMOCK_INTERNAL_MATCHER_PARAMETER(_i, _Signature, _)        \
-  GMOCK_PP_COMMA_IF(_i)                                            \
-  GMOCK_INTERNAL_MATCHER_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature)) \
-  gmock_a##_i
-
-#define GMOCK_INTERNAL_MATCHER_ARGUMENT(_i, _1, _2) \
-  GMOCK_PP_COMMA_IF(_i)                             \
-  gmock_a##_i
-
-#define GMOCK_INTERNAL_A_MATCHER_ARGUMENT(_i, _Signature, _) \
-  GMOCK_PP_COMMA_IF(_i)                                      \
-  ::testing::A<GMOCK_INTERNAL_ARG_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature))>()
-
-#define GMOCK_INTERNAL_ARG_O(_i, ...) \
-  typename ::testing::internal::Function<__VA_ARGS__>::template Arg<_i>::type
-
-#define GMOCK_INTERNAL_MATCHER_O(_i, ...)                          \
-  const ::testing::Matcher<typename ::testing::internal::Function< \
-      __VA_ARGS__>::template Arg<_i>::type>&
-
-#define MOCK_METHOD0(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 0, __VA_ARGS__)
-#define MOCK_METHOD1(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 1, __VA_ARGS__)
-#define MOCK_METHOD2(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 2, __VA_ARGS__)
-#define MOCK_METHOD3(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 3, __VA_ARGS__)
-#define MOCK_METHOD4(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 4, __VA_ARGS__)
-#define MOCK_METHOD5(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 5, __VA_ARGS__)
-#define MOCK_METHOD6(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 6, __VA_ARGS__)
-#define MOCK_METHOD7(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 7, __VA_ARGS__)
-#define MOCK_METHOD8(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 8, __VA_ARGS__)
-#define MOCK_METHOD9(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 9, __VA_ARGS__)
-#define MOCK_METHOD10(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, , m, 10, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 0, __VA_ARGS__)
-#define MOCK_CONST_METHOD1(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 1, __VA_ARGS__)
-#define MOCK_CONST_METHOD2(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 2, __VA_ARGS__)
-#define MOCK_CONST_METHOD3(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 3, __VA_ARGS__)
-#define MOCK_CONST_METHOD4(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 4, __VA_ARGS__)
-#define MOCK_CONST_METHOD5(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 5, __VA_ARGS__)
-#define MOCK_CONST_METHOD6(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 6, __VA_ARGS__)
-#define MOCK_CONST_METHOD7(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 7, __VA_ARGS__)
-#define MOCK_CONST_METHOD8(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 8, __VA_ARGS__)
-#define MOCK_CONST_METHOD9(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 9, __VA_ARGS__)
-#define MOCK_CONST_METHOD10(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 10, __VA_ARGS__)
-
-#define MOCK_METHOD0_T(m, ...) MOCK_METHOD0(m, __VA_ARGS__)
-#define MOCK_METHOD1_T(m, ...) MOCK_METHOD1(m, __VA_ARGS__)
-#define MOCK_METHOD2_T(m, ...) MOCK_METHOD2(m, __VA_ARGS__)
-#define MOCK_METHOD3_T(m, ...) MOCK_METHOD3(m, __VA_ARGS__)
-#define MOCK_METHOD4_T(m, ...) MOCK_METHOD4(m, __VA_ARGS__)
-#define MOCK_METHOD5_T(m, ...) MOCK_METHOD5(m, __VA_ARGS__)
-#define MOCK_METHOD6_T(m, ...) MOCK_METHOD6(m, __VA_ARGS__)
-#define MOCK_METHOD7_T(m, ...) MOCK_METHOD7(m, __VA_ARGS__)
-#define MOCK_METHOD8_T(m, ...) MOCK_METHOD8(m, __VA_ARGS__)
-#define MOCK_METHOD9_T(m, ...) MOCK_METHOD9(m, __VA_ARGS__)
-#define MOCK_METHOD10_T(m, ...) MOCK_METHOD10(m, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0_T(m, ...) MOCK_CONST_METHOD0(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD1_T(m, ...) MOCK_CONST_METHOD1(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD2_T(m, ...) MOCK_CONST_METHOD2(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD3_T(m, ...) MOCK_CONST_METHOD3(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD4_T(m, ...) MOCK_CONST_METHOD4(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD5_T(m, ...) MOCK_CONST_METHOD5(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD6_T(m, ...) MOCK_CONST_METHOD6(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD7_T(m, ...) MOCK_CONST_METHOD7(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD8_T(m, ...) MOCK_CONST_METHOD8(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD9_T(m, ...) MOCK_CONST_METHOD9(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD10_T(m, ...) MOCK_CONST_METHOD10(m, __VA_ARGS__)
-
-#define MOCK_METHOD0_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 0, __VA_ARGS__)
-#define MOCK_METHOD1_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 1, __VA_ARGS__)
-#define MOCK_METHOD2_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 2, __VA_ARGS__)
-#define MOCK_METHOD3_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 3, __VA_ARGS__)
-#define MOCK_METHOD4_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 4, __VA_ARGS__)
-#define MOCK_METHOD5_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 5, __VA_ARGS__)
-#define MOCK_METHOD6_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 6, __VA_ARGS__)
-#define MOCK_METHOD7_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 7, __VA_ARGS__)
-#define MOCK_METHOD8_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 8, __VA_ARGS__)
-#define MOCK_METHOD9_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 9, __VA_ARGS__)
-#define MOCK_METHOD10_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 10, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 0, __VA_ARGS__)
-#define MOCK_CONST_METHOD1_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 1, __VA_ARGS__)
-#define MOCK_CONST_METHOD2_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 2, __VA_ARGS__)
-#define MOCK_CONST_METHOD3_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 3, __VA_ARGS__)
-#define MOCK_CONST_METHOD4_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 4, __VA_ARGS__)
-#define MOCK_CONST_METHOD5_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 5, __VA_ARGS__)
-#define MOCK_CONST_METHOD6_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 6, __VA_ARGS__)
-#define MOCK_CONST_METHOD7_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 7, __VA_ARGS__)
-#define MOCK_CONST_METHOD8_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 8, __VA_ARGS__)
-#define MOCK_CONST_METHOD9_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 9, __VA_ARGS__)
-#define MOCK_CONST_METHOD10_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 10, __VA_ARGS__)
-
-#define MOCK_METHOD0_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD0_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD1_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD1_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD2_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD2_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD3_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD3_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD4_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD4_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD5_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD5_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD6_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD6_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD7_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD7_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD8_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD8_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD9_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD9_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD10_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD10_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD0_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD1_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD1_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD2_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD2_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD3_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD3_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD4_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD4_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD5_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD5_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD6_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD6_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD7_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD7_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD8_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD8_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD9_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD9_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD10_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD10_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHODN(constness, ct, Method, args_num, ...) \
-  GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(                                  \
-      args_num, ::testing::internal::identity_t<__VA_ARGS__>);            \
-  GMOCK_INTERNAL_MOCK_METHOD_IMPL(                                        \
-      args_num, Method, GMOCK_PP_NARG0(constness), 0, 0, , ct, ,          \
-      (::testing::internal::identity_t<__VA_ARGS__>))
-
-#define GMOCK_MOCKER_(arity, constness, Method) \
-  GTEST_CONCAT_TOKEN_(gmock##constness##arity##_##Method##_, __LINE__)
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-matchers.h b/third_party/googletest/googlemock/include/gmock/gmock-matchers.h
deleted file mode 100644
index 86be9c1..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-matchers.h
+++ /dev/null
@@ -1,5392 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// The MATCHER* family of macros can be used in a namespace scope to
-// define custom matchers easily.
-//
-// Basic Usage
-// ===========
-//
-// The syntax
-//
-//   MATCHER(name, description_string) { statements; }
-//
-// defines a matcher with the given name that executes the statements,
-// which must return a bool to indicate if the match succeeds.  Inside
-// the statements, you can refer to the value being matched by 'arg',
-// and refer to its type by 'arg_type'.
-//
-// The description string documents what the matcher does, and is used
-// to generate the failure message when the match fails.  Since a
-// MATCHER() is usually defined in a header file shared by multiple
-// C++ source files, we require the description to be a C-string
-// literal to avoid possible side effects.  It can be empty, in which
-// case we'll use the sequence of words in the matcher name as the
-// description.
-//
-// For example:
-//
-//   MATCHER(IsEven, "") { return (arg % 2) == 0; }
-//
-// allows you to write
-//
-//   // Expects mock_foo.Bar(n) to be called where n is even.
-//   EXPECT_CALL(mock_foo, Bar(IsEven()));
-//
-// or,
-//
-//   // Verifies that the value of some_expression is even.
-//   EXPECT_THAT(some_expression, IsEven());
-//
-// If the above assertion fails, it will print something like:
-//
-//   Value of: some_expression
-//   Expected: is even
-//     Actual: 7
-//
-// where the description "is even" is automatically calculated from the
-// matcher name IsEven.
-//
-// Argument Type
-// =============
-//
-// Note that the type of the value being matched (arg_type) is
-// determined by the context in which you use the matcher and is
-// supplied to you by the compiler, so you don't need to worry about
-// declaring it (nor can you).  This allows the matcher to be
-// polymorphic.  For example, IsEven() can be used to match any type
-// where the value of "(arg % 2) == 0" can be implicitly converted to
-// a bool.  In the "Bar(IsEven())" example above, if method Bar()
-// takes an int, 'arg_type' will be int; if it takes an unsigned long,
-// 'arg_type' will be unsigned long; and so on.
-//
-// Parameterizing Matchers
-// =======================
-//
-// Sometimes you'll want to parameterize the matcher.  For that you
-// can use another macro:
-//
-//   MATCHER_P(name, param_name, description_string) { statements; }
-//
-// For example:
-//
-//   MATCHER_P(HasAbsoluteValue, value, "") { return abs(arg) == value; }
-//
-// will allow you to write:
-//
-//   EXPECT_THAT(Blah("a"), HasAbsoluteValue(n));
-//
-// which may lead to this message (assuming n is 10):
-//
-//   Value of: Blah("a")
-//   Expected: has absolute value 10
-//     Actual: -9
-//
-// Note that both the matcher description and its parameter are
-// printed, making the message human-friendly.
-//
-// In the matcher definition body, you can write 'foo_type' to
-// reference the type of a parameter named 'foo'.  For example, in the
-// body of MATCHER_P(HasAbsoluteValue, value) above, you can write
-// 'value_type' to refer to the type of 'value'.
-//
-// We also provide MATCHER_P2, MATCHER_P3, ..., up to MATCHER_P$n to
-// support multi-parameter matchers.
-//
-// Describing Parameterized Matchers
-// =================================
-//
-// The last argument to MATCHER*() is a string-typed expression.  The
-// expression can reference all of the matcher's parameters and a
-// special bool-typed variable named 'negation'.  When 'negation' is
-// false, the expression should evaluate to the matcher's description;
-// otherwise it should evaluate to the description of the negation of
-// the matcher.  For example,
-//
-//   using testing::PrintToString;
-//
-//   MATCHER_P2(InClosedRange, low, hi,
-//       std::string(negation ? "is not" : "is") + " in range [" +
-//       PrintToString(low) + ", " + PrintToString(hi) + "]") {
-//     return low <= arg && arg <= hi;
-//   }
-//   ...
-//   EXPECT_THAT(3, InClosedRange(4, 6));
-//   EXPECT_THAT(3, Not(InClosedRange(2, 4)));
-//
-// would generate two failures that contain the text:
-//
-//   Expected: is in range [4, 6]
-//   ...
-//   Expected: is not in range [2, 4]
-//
-// If you specify "" as the description, the failure message will
-// contain the sequence of words in the matcher name followed by the
-// parameter values printed as a tuple.  For example,
-//
-//   MATCHER_P2(InClosedRange, low, hi, "") { ... }
-//   ...
-//   EXPECT_THAT(3, InClosedRange(4, 6));
-//   EXPECT_THAT(3, Not(InClosedRange(2, 4)));
-//
-// would generate two failures that contain the text:
-//
-//   Expected: in closed range (4, 6)
-//   ...
-//   Expected: not (in closed range (2, 4))
-//
-// Types of Matcher Parameters
-// ===========================
-//
-// For the purpose of typing, you can view
-//
-//   MATCHER_Pk(Foo, p1, ..., pk, description_string) { ... }
-//
-// as shorthand for
-//
-//   template <typename p1_type, ..., typename pk_type>
-//   FooMatcherPk<p1_type, ..., pk_type>
-//   Foo(p1_type p1, ..., pk_type pk) { ... }
-//
-// When you write Foo(v1, ..., vk), the compiler infers the types of
-// the parameters v1, ..., and vk for you.  If you are not happy with
-// the result of the type inference, you can specify the types by
-// explicitly instantiating the template, as in Foo<long, bool>(5,
-// false).  As said earlier, you don't get to (or need to) specify
-// 'arg_type' as that's determined by the context in which the matcher
-// is used.  You can assign the result of expression Foo(p1, ..., pk)
-// to a variable of type FooMatcherPk<p1_type, ..., pk_type>.  This
-// can be useful when composing matchers.
-//
-// While you can instantiate a matcher template with reference types,
-// passing the parameters by pointer usually makes your code more
-// readable.  If, however, you still want to pass a parameter by
-// reference, be aware that in the failure message generated by the
-// matcher you will see the value of the referenced object but not its
-// address.
-//
-// Explaining Match Results
-// ========================
-//
-// Sometimes the matcher description alone isn't enough to explain why
-// the match has failed or succeeded.  For example, when expecting a
-// long string, it can be very helpful to also print the diff between
-// the expected string and the actual one.  To achieve that, you can
-// optionally stream additional information to a special variable
-// named result_listener, whose type is a pointer to class
-// MatchResultListener:
-//
-//   MATCHER_P(EqualsLongString, str, "") {
-//     if (arg == str) return true;
-//
-//     *result_listener << "the difference: "
-///                     << DiffStrings(str, arg);
-//     return false;
-//   }
-//
-// Overloading Matchers
-// ====================
-//
-// You can overload matchers with different numbers of parameters:
-//
-//   MATCHER_P(Blah, a, description_string1) { ... }
-//   MATCHER_P2(Blah, a, b, description_string2) { ... }
-//
-// Caveats
-// =======
-//
-// When defining a new matcher, you should also consider implementing
-// MatcherInterface or using MakePolymorphicMatcher().  These
-// approaches require more work than the MATCHER* macros, but also
-// give you more control on the types of the value being matched and
-// the matcher parameters, which may leads to better compiler error
-// messages when the matcher is used wrong.  They also allow
-// overloading matchers based on parameter types (as opposed to just
-// based on the number of parameters).
-//
-// MATCHER*() can only be used in a namespace scope as templates cannot be
-// declared inside of a local class.
-//
-// More Information
-// ================
-//
-// To learn more about using these macros, please search for 'MATCHER'
-// on
-// https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
-//
-// This file also implements some commonly used argument matchers.  More
-// matchers can be defined by the user implementing the
-// MatcherInterface<T> interface if necessary.
-//
-// See googletest/include/gtest/gtest-matchers.h for the definition of class
-// Matcher, class MatcherInterface, and others.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
-
-#include <algorithm>
-#include <cmath>
-#include <initializer_list>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gmock/internal/gmock-internal-utils.h"
-#include "gmock/internal/gmock-port.h"
-#include "gmock/internal/gmock-pp.h"
-#include "gtest/gtest.h"
-
-// MSVC warning C5046 is new as of VS2017 version 15.8.
-#if defined(_MSC_VER) && _MSC_VER >= 1915
-#define GMOCK_MAYBE_5046_ 5046
-#else
-#define GMOCK_MAYBE_5046_
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(
-    4251 GMOCK_MAYBE_5046_ /* class A needs to have dll-interface to be used by
-                              clients of class B */
-    /* Symbol involving type with internal linkage not defined */)
-
-namespace testing {
-
-// To implement a matcher Foo for type T, define:
-//   1. a class FooMatcherImpl that implements the
-//      MatcherInterface<T> interface, and
-//   2. a factory function that creates a Matcher<T> object from a
-//      FooMatcherImpl*.
-//
-// The two-level delegation design makes it possible to allow a user
-// to write "v" instead of "Eq(v)" where a Matcher is expected, which
-// is impossible if we pass matchers by pointers.  It also eases
-// ownership management as Matcher objects can now be copied like
-// plain values.
-
-// A match result listener that stores the explanation in a string.
-class StringMatchResultListener : public MatchResultListener {
- public:
-  StringMatchResultListener() : MatchResultListener(&ss_) {}
-
-  // Returns the explanation accumulated so far.
-  std::string str() const { return ss_.str(); }
-
-  // Clears the explanation accumulated so far.
-  void Clear() { ss_.str(""); }
-
- private:
-  ::std::stringstream ss_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StringMatchResultListener);
-};
-
-// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
-// and MUST NOT BE USED IN USER CODE!!!
-namespace internal {
-
-// The MatcherCastImpl class template is a helper for implementing
-// MatcherCast().  We need this helper in order to partially
-// specialize the implementation of MatcherCast() (C++ allows
-// class/struct templates to be partially specialized, but not
-// function templates.).
-
-// This general version is used when MatcherCast()'s argument is a
-// polymorphic matcher (i.e. something that can be converted to a
-// Matcher but is not one yet; for example, Eq(value)) or a value (for
-// example, "hello").
-template <typename T, typename M>
-class MatcherCastImpl {
- public:
-  static Matcher<T> Cast(const M& polymorphic_matcher_or_value) {
-    // M can be a polymorphic matcher, in which case we want to use
-    // its conversion operator to create Matcher<T>.  Or it can be a value
-    // that should be passed to the Matcher<T>'s constructor.
-    //
-    // We can't call Matcher<T>(polymorphic_matcher_or_value) when M is a
-    // polymorphic matcher because it'll be ambiguous if T has an implicit
-    // constructor from M (this usually happens when T has an implicit
-    // constructor from any type).
-    //
-    // It won't work to unconditionally implicit_cast
-    // polymorphic_matcher_or_value to Matcher<T> because it won't trigger
-    // a user-defined conversion from M to T if one exists (assuming M is
-    // a value).
-    return CastImpl(polymorphic_matcher_or_value,
-                    std::is_convertible<M, Matcher<T>>{},
-                    std::is_convertible<M, T>{});
-  }
-
- private:
-  template <bool Ignore>
-  static Matcher<T> CastImpl(const M& polymorphic_matcher_or_value,
-                             std::true_type /* convertible_to_matcher */,
-                             std::integral_constant<bool, Ignore>) {
-    // M is implicitly convertible to Matcher<T>, which means that either
-    // M is a polymorphic matcher or Matcher<T> has an implicit constructor
-    // from M.  In both cases using the implicit conversion will produce a
-    // matcher.
-    //
-    // Even if T has an implicit constructor from M, it won't be called because
-    // creating Matcher<T> would require a chain of two user-defined conversions
-    // (first to create T from M and then to create Matcher<T> from T).
-    return polymorphic_matcher_or_value;
-  }
-
-  // M can't be implicitly converted to Matcher<T>, so M isn't a polymorphic
-  // matcher. It's a value of a type implicitly convertible to T. Use direct
-  // initialization to create a matcher.
-  static Matcher<T> CastImpl(const M& value,
-                             std::false_type /* convertible_to_matcher */,
-                             std::true_type /* convertible_to_T */) {
-    return Matcher<T>(ImplicitCast_<T>(value));
-  }
-
-  // M can't be implicitly converted to either Matcher<T> or T. Attempt to use
-  // polymorphic matcher Eq(value) in this case.
-  //
-  // Note that we first attempt to perform an implicit cast on the value and
-  // only fall back to the polymorphic Eq() matcher afterwards because the
-  // latter calls bool operator==(const Lhs& lhs, const Rhs& rhs) in the end
-  // which might be undefined even when Rhs is implicitly convertible to Lhs
-  // (e.g. std::pair<const int, int> vs. std::pair<int, int>).
-  //
-  // We don't define this method inline as we need the declaration of Eq().
-  static Matcher<T> CastImpl(const M& value,
-                             std::false_type /* convertible_to_matcher */,
-                             std::false_type /* convertible_to_T */);
-};
-
-// This more specialized version is used when MatcherCast()'s argument
-// is already a Matcher.  This only compiles when type T can be
-// statically converted to type U.
-template <typename T, typename U>
-class MatcherCastImpl<T, Matcher<U> > {
- public:
-  static Matcher<T> Cast(const Matcher<U>& source_matcher) {
-    return Matcher<T>(new Impl(source_matcher));
-  }
-
- private:
-  class Impl : public MatcherInterface<T> {
-   public:
-    explicit Impl(const Matcher<U>& source_matcher)
-        : source_matcher_(source_matcher) {}
-
-    // We delegate the matching logic to the source matcher.
-    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
-      using FromType = typename std::remove_cv<typename std::remove_pointer<
-          typename std::remove_reference<T>::type>::type>::type;
-      using ToType = typename std::remove_cv<typename std::remove_pointer<
-          typename std::remove_reference<U>::type>::type>::type;
-      // Do not allow implicitly converting base*/& to derived*/&.
-      static_assert(
-          // Do not trigger if only one of them is a pointer. That implies a
-          // regular conversion and not a down_cast.
-          (std::is_pointer<typename std::remove_reference<T>::type>::value !=
-           std::is_pointer<typename std::remove_reference<U>::type>::value) ||
-              std::is_same<FromType, ToType>::value ||
-              !std::is_base_of<FromType, ToType>::value,
-          "Can't implicitly convert from <base> to <derived>");
-
-      // Do the cast to `U` explicitly if necessary.
-      // Otherwise, let implicit conversions do the trick.
-      using CastType =
-          typename std::conditional<std::is_convertible<T&, const U&>::value,
-                                    T&, U>::type;
-
-      return source_matcher_.MatchAndExplain(static_cast<CastType>(x),
-                                             listener);
-    }
-
-    void DescribeTo(::std::ostream* os) const override {
-      source_matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      source_matcher_.DescribeNegationTo(os);
-    }
-
-   private:
-    const Matcher<U> source_matcher_;
-  };
-};
-
-// This even more specialized version is used for efficiently casting
-// a matcher to its own type.
-template <typename T>
-class MatcherCastImpl<T, Matcher<T> > {
- public:
-  static Matcher<T> Cast(const Matcher<T>& matcher) { return matcher; }
-};
-
-// Template specialization for parameterless Matcher.
-template <typename Derived>
-class MatcherBaseImpl {
- public:
-  MatcherBaseImpl() = default;
-
-  template <typename T>
-  operator ::testing::Matcher<T>() const {  // NOLINT(runtime/explicit)
-    return ::testing::Matcher<T>(new
-                                 typename Derived::template gmock_Impl<T>());
-  }
-};
-
-// Template specialization for Matcher with parameters.
-template <template <typename...> class Derived, typename... Ts>
-class MatcherBaseImpl<Derived<Ts...>> {
- public:
-  // Mark the constructor explicit for single argument T to avoid implicit
-  // conversions.
-  template <typename E = std::enable_if<sizeof...(Ts) == 1>,
-            typename E::type* = nullptr>
-  explicit MatcherBaseImpl(Ts... params)
-      : params_(std::forward<Ts>(params)...) {}
-  template <typename E = std::enable_if<sizeof...(Ts) != 1>,
-            typename = typename E::type>
-  MatcherBaseImpl(Ts... params)  // NOLINT
-      : params_(std::forward<Ts>(params)...) {}
-
-  template <typename F>
-  operator ::testing::Matcher<F>() const {  // NOLINT(runtime/explicit)
-    return Apply<F>(MakeIndexSequence<sizeof...(Ts)>{});
-  }
-
- private:
-  template <typename F, std::size_t... tuple_ids>
-  ::testing::Matcher<F> Apply(IndexSequence<tuple_ids...>) const {
-    return ::testing::Matcher<F>(
-        new typename Derived<Ts...>::template gmock_Impl<F>(
-            std::get<tuple_ids>(params_)...));
-  }
-
-  const std::tuple<Ts...> params_;
-};
-
-}  // namespace internal
-
-// In order to be safe and clear, casting between different matcher
-// types is done explicitly via MatcherCast<T>(m), which takes a
-// matcher m and returns a Matcher<T>.  It compiles only when T can be
-// statically converted to the argument type of m.
-template <typename T, typename M>
-inline Matcher<T> MatcherCast(const M& matcher) {
-  return internal::MatcherCastImpl<T, M>::Cast(matcher);
-}
-
-// This overload handles polymorphic matchers and values only since
-// monomorphic matchers are handled by the next one.
-template <typename T, typename M>
-inline Matcher<T> SafeMatcherCast(const M& polymorphic_matcher_or_value) {
-  return MatcherCast<T>(polymorphic_matcher_or_value);
-}
-
-// This overload handles monomorphic matchers.
-//
-// In general, if type T can be implicitly converted to type U, we can
-// safely convert a Matcher<U> to a Matcher<T> (i.e. Matcher is
-// contravariant): just keep a copy of the original Matcher<U>, convert the
-// argument from type T to U, and then pass it to the underlying Matcher<U>.
-// The only exception is when U is a reference and T is not, as the
-// underlying Matcher<U> may be interested in the argument's address, which
-// is not preserved in the conversion from T to U.
-template <typename T, typename U>
-inline Matcher<T> SafeMatcherCast(const Matcher<U>& matcher) {
-  // Enforce that T can be implicitly converted to U.
-  static_assert(std::is_convertible<const T&, const U&>::value,
-                "T must be implicitly convertible to U");
-  // Enforce that we are not converting a non-reference type T to a reference
-  // type U.
-  GTEST_COMPILE_ASSERT_(
-      std::is_reference<T>::value || !std::is_reference<U>::value,
-      cannot_convert_non_reference_arg_to_reference);
-  // In case both T and U are arithmetic types, enforce that the
-  // conversion is not lossy.
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(T) RawT;
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(U) RawU;
-  constexpr bool kTIsOther = GMOCK_KIND_OF_(RawT) == internal::kOther;
-  constexpr bool kUIsOther = GMOCK_KIND_OF_(RawU) == internal::kOther;
-  GTEST_COMPILE_ASSERT_(
-      kTIsOther || kUIsOther ||
-      (internal::LosslessArithmeticConvertible<RawT, RawU>::value),
-      conversion_of_arithmetic_types_must_be_lossless);
-  return MatcherCast<T>(matcher);
-}
-
-// A<T>() returns a matcher that matches any value of type T.
-template <typename T>
-Matcher<T> A();
-
-// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
-// and MUST NOT BE USED IN USER CODE!!!
-namespace internal {
-
-// If the explanation is not empty, prints it to the ostream.
-inline void PrintIfNotEmpty(const std::string& explanation,
-                            ::std::ostream* os) {
-  if (explanation != "" && os != nullptr) {
-    *os << ", " << explanation;
-  }
-}
-
-// Returns true if the given type name is easy to read by a human.
-// This is used to decide whether printing the type of a value might
-// be helpful.
-inline bool IsReadableTypeName(const std::string& type_name) {
-  // We consider a type name readable if it's short or doesn't contain
-  // a template or function type.
-  return (type_name.length() <= 20 ||
-          type_name.find_first_of("<(") == std::string::npos);
-}
-
-// Matches the value against the given matcher, prints the value and explains
-// the match result to the listener. Returns the match result.
-// 'listener' must not be NULL.
-// Value cannot be passed by const reference, because some matchers take a
-// non-const argument.
-template <typename Value, typename T>
-bool MatchPrintAndExplain(Value& value, const Matcher<T>& matcher,
-                          MatchResultListener* listener) {
-  if (!listener->IsInterested()) {
-    // If the listener is not interested, we do not need to construct the
-    // inner explanation.
-    return matcher.Matches(value);
-  }
-
-  StringMatchResultListener inner_listener;
-  const bool match = matcher.MatchAndExplain(value, &inner_listener);
-
-  UniversalPrint(value, listener->stream());
-#if GTEST_HAS_RTTI
-  const std::string& type_name = GetTypeName<Value>();
-  if (IsReadableTypeName(type_name))
-    *listener->stream() << " (of type " << type_name << ")";
-#endif
-  PrintIfNotEmpty(inner_listener.str(), listener->stream());
-
-  return match;
-}
-
-// An internal helper class for doing compile-time loop on a tuple's
-// fields.
-template <size_t N>
-class TuplePrefix {
- public:
-  // TuplePrefix<N>::Matches(matcher_tuple, value_tuple) returns true
-  // if and only if the first N fields of matcher_tuple matches
-  // the first N fields of value_tuple, respectively.
-  template <typename MatcherTuple, typename ValueTuple>
-  static bool Matches(const MatcherTuple& matcher_tuple,
-                      const ValueTuple& value_tuple) {
-    return TuplePrefix<N - 1>::Matches(matcher_tuple, value_tuple) &&
-           std::get<N - 1>(matcher_tuple).Matches(std::get<N - 1>(value_tuple));
-  }
-
-  // TuplePrefix<N>::ExplainMatchFailuresTo(matchers, values, os)
-  // describes failures in matching the first N fields of matchers
-  // against the first N fields of values.  If there is no failure,
-  // nothing will be streamed to os.
-  template <typename MatcherTuple, typename ValueTuple>
-  static void ExplainMatchFailuresTo(const MatcherTuple& matchers,
-                                     const ValueTuple& values,
-                                     ::std::ostream* os) {
-    // First, describes failures in the first N - 1 fields.
-    TuplePrefix<N - 1>::ExplainMatchFailuresTo(matchers, values, os);
-
-    // Then describes the failure (if any) in the (N - 1)-th (0-based)
-    // field.
-    typename std::tuple_element<N - 1, MatcherTuple>::type matcher =
-        std::get<N - 1>(matchers);
-    typedef typename std::tuple_element<N - 1, ValueTuple>::type Value;
-    const Value& value = std::get<N - 1>(values);
-    StringMatchResultListener listener;
-    if (!matcher.MatchAndExplain(value, &listener)) {
-      *os << "  Expected arg #" << N - 1 << ": ";
-      std::get<N - 1>(matchers).DescribeTo(os);
-      *os << "\n           Actual: ";
-      // We remove the reference in type Value to prevent the
-      // universal printer from printing the address of value, which
-      // isn't interesting to the user most of the time.  The
-      // matcher's MatchAndExplain() method handles the case when
-      // the address is interesting.
-      internal::UniversalPrint(value, os);
-      PrintIfNotEmpty(listener.str(), os);
-      *os << "\n";
-    }
-  }
-};
-
-// The base case.
-template <>
-class TuplePrefix<0> {
- public:
-  template <typename MatcherTuple, typename ValueTuple>
-  static bool Matches(const MatcherTuple& /* matcher_tuple */,
-                      const ValueTuple& /* value_tuple */) {
-    return true;
-  }
-
-  template <typename MatcherTuple, typename ValueTuple>
-  static void ExplainMatchFailuresTo(const MatcherTuple& /* matchers */,
-                                     const ValueTuple& /* values */,
-                                     ::std::ostream* /* os */) {}
-};
-
-// TupleMatches(matcher_tuple, value_tuple) returns true if and only if
-// all matchers in matcher_tuple match the corresponding fields in
-// value_tuple.  It is a compiler error if matcher_tuple and
-// value_tuple have different number of fields or incompatible field
-// types.
-template <typename MatcherTuple, typename ValueTuple>
-bool TupleMatches(const MatcherTuple& matcher_tuple,
-                  const ValueTuple& value_tuple) {
-  // Makes sure that matcher_tuple and value_tuple have the same
-  // number of fields.
-  GTEST_COMPILE_ASSERT_(std::tuple_size<MatcherTuple>::value ==
-                            std::tuple_size<ValueTuple>::value,
-                        matcher_and_value_have_different_numbers_of_fields);
-  return TuplePrefix<std::tuple_size<ValueTuple>::value>::Matches(matcher_tuple,
-                                                                  value_tuple);
-}
-
-// Describes failures in matching matchers against values.  If there
-// is no failure, nothing will be streamed to os.
-template <typename MatcherTuple, typename ValueTuple>
-void ExplainMatchFailureTupleTo(const MatcherTuple& matchers,
-                                const ValueTuple& values,
-                                ::std::ostream* os) {
-  TuplePrefix<std::tuple_size<MatcherTuple>::value>::ExplainMatchFailuresTo(
-      matchers, values, os);
-}
-
-// TransformTupleValues and its helper.
-//
-// TransformTupleValuesHelper hides the internal machinery that
-// TransformTupleValues uses to implement a tuple traversal.
-template <typename Tuple, typename Func, typename OutIter>
-class TransformTupleValuesHelper {
- private:
-  typedef ::std::tuple_size<Tuple> TupleSize;
-
- public:
-  // For each member of tuple 't', taken in order, evaluates '*out++ = f(t)'.
-  // Returns the final value of 'out' in case the caller needs it.
-  static OutIter Run(Func f, const Tuple& t, OutIter out) {
-    return IterateOverTuple<Tuple, TupleSize::value>()(f, t, out);
-  }
-
- private:
-  template <typename Tup, size_t kRemainingSize>
-  struct IterateOverTuple {
-    OutIter operator() (Func f, const Tup& t, OutIter out) const {
-      *out++ = f(::std::get<TupleSize::value - kRemainingSize>(t));
-      return IterateOverTuple<Tup, kRemainingSize - 1>()(f, t, out);
-    }
-  };
-  template <typename Tup>
-  struct IterateOverTuple<Tup, 0> {
-    OutIter operator() (Func /* f */, const Tup& /* t */, OutIter out) const {
-      return out;
-    }
-  };
-};
-
-// Successively invokes 'f(element)' on each element of the tuple 't',
-// appending each result to the 'out' iterator. Returns the final value
-// of 'out'.
-template <typename Tuple, typename Func, typename OutIter>
-OutIter TransformTupleValues(Func f, const Tuple& t, OutIter out) {
-  return TransformTupleValuesHelper<Tuple, Func, OutIter>::Run(f, t, out);
-}
-
-// Implements _, a matcher that matches any value of any
-// type.  This is a polymorphic matcher, so we need a template type
-// conversion operator to make it appearing as a Matcher<T> for any
-// type T.
-class AnythingMatcher {
- public:
-  using is_gtest_matcher = void;
-
-  template <typename T>
-  bool MatchAndExplain(const T& /* x */, std::ostream* /* listener */) const {
-    return true;
-  }
-  void DescribeTo(std::ostream* os) const { *os << "is anything"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    // This is mostly for completeness' sake, as it's not very useful
-    // to write Not(A<bool>()).  However we cannot completely rule out
-    // such a possibility, and it doesn't hurt to be prepared.
-    *os << "never matches";
-  }
-};
-
-// Implements the polymorphic IsNull() matcher, which matches any raw or smart
-// pointer that is NULL.
-class IsNullMatcher {
- public:
-  template <typename Pointer>
-  bool MatchAndExplain(const Pointer& p,
-                       MatchResultListener* /* listener */) const {
-    return p == nullptr;
-  }
-
-  void DescribeTo(::std::ostream* os) const { *os << "is NULL"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "isn't NULL";
-  }
-};
-
-// Implements the polymorphic NotNull() matcher, which matches any raw or smart
-// pointer that is not NULL.
-class NotNullMatcher {
- public:
-  template <typename Pointer>
-  bool MatchAndExplain(const Pointer& p,
-                       MatchResultListener* /* listener */) const {
-    return p != nullptr;
-  }
-
-  void DescribeTo(::std::ostream* os) const { *os << "isn't NULL"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "is NULL";
-  }
-};
-
-// Ref(variable) matches any argument that is a reference to
-// 'variable'.  This matcher is polymorphic as it can match any
-// super type of the type of 'variable'.
-//
-// The RefMatcher template class implements Ref(variable).  It can
-// only be instantiated with a reference type.  This prevents a user
-// from mistakenly using Ref(x) to match a non-reference function
-// argument.  For example, the following will righteously cause a
-// compiler error:
-//
-//   int n;
-//   Matcher<int> m1 = Ref(n);   // This won't compile.
-//   Matcher<int&> m2 = Ref(n);  // This will compile.
-template <typename T>
-class RefMatcher;
-
-template <typename T>
-class RefMatcher<T&> {
-  // Google Mock is a generic framework and thus needs to support
-  // mocking any function types, including those that take non-const
-  // reference arguments.  Therefore the template parameter T (and
-  // Super below) can be instantiated to either a const type or a
-  // non-const type.
- public:
-  // RefMatcher() takes a T& instead of const T&, as we want the
-  // compiler to catch using Ref(const_value) as a matcher for a
-  // non-const reference.
-  explicit RefMatcher(T& x) : object_(x) {}  // NOLINT
-
-  template <typename Super>
-  operator Matcher<Super&>() const {
-    // By passing object_ (type T&) to Impl(), which expects a Super&,
-    // we make sure that Super is a super type of T.  In particular,
-    // this catches using Ref(const_value) as a matcher for a
-    // non-const reference, as you cannot implicitly convert a const
-    // reference to a non-const reference.
-    return MakeMatcher(new Impl<Super>(object_));
-  }
-
- private:
-  template <typename Super>
-  class Impl : public MatcherInterface<Super&> {
-   public:
-    explicit Impl(Super& x) : object_(x) {}  // NOLINT
-
-    // MatchAndExplain() takes a Super& (as opposed to const Super&)
-    // in order to match the interface MatcherInterface<Super&>.
-    bool MatchAndExplain(Super& x,
-                         MatchResultListener* listener) const override {
-      *listener << "which is located @" << static_cast<const void*>(&x);
-      return &x == &object_;
-    }
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "references the variable ";
-      UniversalPrinter<Super&>::Print(object_, os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "does not reference the variable ";
-      UniversalPrinter<Super&>::Print(object_, os);
-    }
-
-   private:
-    const Super& object_;
-  };
-
-  T& object_;
-};
-
-// Polymorphic helper functions for narrow and wide string matchers.
-inline bool CaseInsensitiveCStringEquals(const char* lhs, const char* rhs) {
-  return String::CaseInsensitiveCStringEquals(lhs, rhs);
-}
-
-inline bool CaseInsensitiveCStringEquals(const wchar_t* lhs,
-                                         const wchar_t* rhs) {
-  return String::CaseInsensitiveWideCStringEquals(lhs, rhs);
-}
-
-// String comparison for narrow or wide strings that can have embedded NUL
-// characters.
-template <typename StringType>
-bool CaseInsensitiveStringEquals(const StringType& s1,
-                                 const StringType& s2) {
-  // Are the heads equal?
-  if (!CaseInsensitiveCStringEquals(s1.c_str(), s2.c_str())) {
-    return false;
-  }
-
-  // Skip the equal heads.
-  const typename StringType::value_type nul = 0;
-  const size_t i1 = s1.find(nul), i2 = s2.find(nul);
-
-  // Are we at the end of either s1 or s2?
-  if (i1 == StringType::npos || i2 == StringType::npos) {
-    return i1 == i2;
-  }
-
-  // Are the tails equal?
-  return CaseInsensitiveStringEquals(s1.substr(i1 + 1), s2.substr(i2 + 1));
-}
-
-// String matchers.
-
-// Implements equality-based string matchers like StrEq, StrCaseNe, and etc.
-template <typename StringType>
-class StrEqualityMatcher {
- public:
-  StrEqualityMatcher(StringType str, bool expect_eq, bool case_sensitive)
-      : string_(std::move(str)),
-        expect_eq_(expect_eq),
-        case_sensitive_(case_sensitive) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    if (s == nullptr) {
-      return !expect_eq_;
-    }
-    return MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const StringType s2(s);
-    const bool eq = case_sensitive_ ? s2 == string_ :
-        CaseInsensitiveStringEquals(s2, string_);
-    return expect_eq_ == eq;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    DescribeToHelper(expect_eq_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    DescribeToHelper(!expect_eq_, os);
-  }
-
- private:
-  void DescribeToHelper(bool expect_eq, ::std::ostream* os) const {
-    *os << (expect_eq ? "is " : "isn't ");
-    *os << "equal to ";
-    if (!case_sensitive_) {
-      *os << "(ignoring case) ";
-    }
-    UniversalPrint(string_, os);
-  }
-
-  const StringType string_;
-  const bool expect_eq_;
-  const bool case_sensitive_;
-};
-
-// Implements the polymorphic HasSubstr(substring) matcher, which
-// can be used as a Matcher<T> as long as T can be converted to a
-// string.
-template <typename StringType>
-class HasSubstrMatcher {
- public:
-  explicit HasSubstrMatcher(const StringType& substring)
-      : substring_(substring) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    return StringType(s).find(substring_) != StringType::npos;
-  }
-
-  // Describes what this matcher matches.
-  void DescribeTo(::std::ostream* os) const {
-    *os << "has substring ";
-    UniversalPrint(substring_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "has no substring ";
-    UniversalPrint(substring_, os);
-  }
-
- private:
-  const StringType substring_;
-};
-
-// Implements the polymorphic StartsWith(substring) matcher, which
-// can be used as a Matcher<T> as long as T can be converted to a
-// string.
-template <typename StringType>
-class StartsWithMatcher {
- public:
-  explicit StartsWithMatcher(const StringType& prefix) : prefix_(prefix) {
-  }
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const StringType& s2(s);
-    return s2.length() >= prefix_.length() &&
-        s2.substr(0, prefix_.length()) == prefix_;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "starts with ";
-    UniversalPrint(prefix_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't start with ";
-    UniversalPrint(prefix_, os);
-  }
-
- private:
-  const StringType prefix_;
-};
-
-// Implements the polymorphic EndsWith(substring) matcher, which
-// can be used as a Matcher<T> as long as T can be converted to a
-// string.
-template <typename StringType>
-class EndsWithMatcher {
- public:
-  explicit EndsWithMatcher(const StringType& suffix) : suffix_(suffix) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const StringType& s2(s);
-    return s2.length() >= suffix_.length() &&
-        s2.substr(s2.length() - suffix_.length()) == suffix_;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "ends with ";
-    UniversalPrint(suffix_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't end with ";
-    UniversalPrint(suffix_, os);
-  }
-
- private:
-  const StringType suffix_;
-};
-
-// Implements a matcher that compares the two fields of a 2-tuple
-// using one of the ==, <=, <, etc, operators.  The two fields being
-// compared don't have to have the same type.
-//
-// The matcher defined here is polymorphic (for example, Eq() can be
-// used to match a std::tuple<int, short>, a std::tuple<const long&, double>,
-// etc).  Therefore we use a template type conversion operator in the
-// implementation.
-template <typename D, typename Op>
-class PairMatchBase {
- public:
-  template <typename T1, typename T2>
-  operator Matcher<::std::tuple<T1, T2>>() const {
-    return Matcher<::std::tuple<T1, T2>>(new Impl<const ::std::tuple<T1, T2>&>);
-  }
-  template <typename T1, typename T2>
-  operator Matcher<const ::std::tuple<T1, T2>&>() const {
-    return MakeMatcher(new Impl<const ::std::tuple<T1, T2>&>);
-  }
-
- private:
-  static ::std::ostream& GetDesc(::std::ostream& os) {  // NOLINT
-    return os << D::Desc();
-  }
-
-  template <typename Tuple>
-  class Impl : public MatcherInterface<Tuple> {
-   public:
-    bool MatchAndExplain(Tuple args,
-                         MatchResultListener* /* listener */) const override {
-      return Op()(::std::get<0>(args), ::std::get<1>(args));
-    }
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "are " << GetDesc;
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "aren't " << GetDesc;
-    }
-  };
-};
-
-class Eq2Matcher : public PairMatchBase<Eq2Matcher, AnyEq> {
- public:
-  static const char* Desc() { return "an equal pair"; }
-};
-class Ne2Matcher : public PairMatchBase<Ne2Matcher, AnyNe> {
- public:
-  static const char* Desc() { return "an unequal pair"; }
-};
-class Lt2Matcher : public PairMatchBase<Lt2Matcher, AnyLt> {
- public:
-  static const char* Desc() { return "a pair where the first < the second"; }
-};
-class Gt2Matcher : public PairMatchBase<Gt2Matcher, AnyGt> {
- public:
-  static const char* Desc() { return "a pair where the first > the second"; }
-};
-class Le2Matcher : public PairMatchBase<Le2Matcher, AnyLe> {
- public:
-  static const char* Desc() { return "a pair where the first <= the second"; }
-};
-class Ge2Matcher : public PairMatchBase<Ge2Matcher, AnyGe> {
- public:
-  static const char* Desc() { return "a pair where the first >= the second"; }
-};
-
-// Implements the Not(...) matcher for a particular argument type T.
-// We do not nest it inside the NotMatcher class template, as that
-// will prevent different instantiations of NotMatcher from sharing
-// the same NotMatcherImpl<T> class.
-template <typename T>
-class NotMatcherImpl : public MatcherInterface<const T&> {
- public:
-  explicit NotMatcherImpl(const Matcher<T>& matcher)
-      : matcher_(matcher) {}
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    return !matcher_.MatchAndExplain(x, listener);
-  }
-
-  void DescribeTo(::std::ostream* os) const override {
-    matcher_.DescribeNegationTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    matcher_.DescribeTo(os);
-  }
-
- private:
-  const Matcher<T> matcher_;
-};
-
-// Implements the Not(m) matcher, which matches a value that doesn't
-// match matcher m.
-template <typename InnerMatcher>
-class NotMatcher {
- public:
-  explicit NotMatcher(InnerMatcher matcher) : matcher_(matcher) {}
-
-  // This template type conversion operator allows Not(m) to be used
-  // to match any type m can match.
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new NotMatcherImpl<T>(SafeMatcherCast<T>(matcher_)));
-  }
-
- private:
-  InnerMatcher matcher_;
-};
-
-// Implements the AllOf(m1, m2) matcher for a particular argument type
-// T. We do not nest it inside the BothOfMatcher class template, as
-// that will prevent different instantiations of BothOfMatcher from
-// sharing the same BothOfMatcherImpl<T> class.
-template <typename T>
-class AllOfMatcherImpl : public MatcherInterface<const T&> {
- public:
-  explicit AllOfMatcherImpl(std::vector<Matcher<T> > matchers)
-      : matchers_(std::move(matchers)) {}
-
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") and (";
-      matchers_[i].DescribeTo(os);
-    }
-    *os << ")";
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") or (";
-      matchers_[i].DescribeNegationTo(os);
-    }
-    *os << ")";
-  }
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    // If either matcher1_ or matcher2_ doesn't match x, we only need
-    // to explain why one of them fails.
-    std::string all_match_result;
-
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      StringMatchResultListener slistener;
-      if (matchers_[i].MatchAndExplain(x, &slistener)) {
-        if (all_match_result.empty()) {
-          all_match_result = slistener.str();
-        } else {
-          std::string result = slistener.str();
-          if (!result.empty()) {
-            all_match_result += ", and ";
-            all_match_result += result;
-          }
-        }
-      } else {
-        *listener << slistener.str();
-        return false;
-      }
-    }
-
-    // Otherwise we need to explain why *both* of them match.
-    *listener << all_match_result;
-    return true;
-  }
-
- private:
-  const std::vector<Matcher<T> > matchers_;
-};
-
-// VariadicMatcher is used for the variadic implementation of
-// AllOf(m_1, m_2, ...) and AnyOf(m_1, m_2, ...).
-// CombiningMatcher<T> is used to recursively combine the provided matchers
-// (of type Args...).
-template <template <typename T> class CombiningMatcher, typename... Args>
-class VariadicMatcher {
- public:
-  VariadicMatcher(const Args&... matchers)  // NOLINT
-      : matchers_(matchers...) {
-    static_assert(sizeof...(Args) > 0, "Must have at least one matcher.");
-  }
-
-  VariadicMatcher(const VariadicMatcher&) = default;
-  VariadicMatcher& operator=(const VariadicMatcher&) = delete;
-
-  // This template type conversion operator allows an
-  // VariadicMatcher<Matcher1, Matcher2...> object to match any type that
-  // all of the provided matchers (Matcher1, Matcher2, ...) can match.
-  template <typename T>
-  operator Matcher<T>() const {
-    std::vector<Matcher<T> > values;
-    CreateVariadicMatcher<T>(&values, std::integral_constant<size_t, 0>());
-    return Matcher<T>(new CombiningMatcher<T>(std::move(values)));
-  }
-
- private:
-  template <typename T, size_t I>
-  void CreateVariadicMatcher(std::vector<Matcher<T> >* values,
-                             std::integral_constant<size_t, I>) const {
-    values->push_back(SafeMatcherCast<T>(std::get<I>(matchers_)));
-    CreateVariadicMatcher<T>(values, std::integral_constant<size_t, I + 1>());
-  }
-
-  template <typename T>
-  void CreateVariadicMatcher(
-      std::vector<Matcher<T> >*,
-      std::integral_constant<size_t, sizeof...(Args)>) const {}
-
-  std::tuple<Args...> matchers_;
-};
-
-template <typename... Args>
-using AllOfMatcher = VariadicMatcher<AllOfMatcherImpl, Args...>;
-
-// Implements the AnyOf(m1, m2) matcher for a particular argument type
-// T.  We do not nest it inside the AnyOfMatcher class template, as
-// that will prevent different instantiations of AnyOfMatcher from
-// sharing the same EitherOfMatcherImpl<T> class.
-template <typename T>
-class AnyOfMatcherImpl : public MatcherInterface<const T&> {
- public:
-  explicit AnyOfMatcherImpl(std::vector<Matcher<T> > matchers)
-      : matchers_(std::move(matchers)) {}
-
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") or (";
-      matchers_[i].DescribeTo(os);
-    }
-    *os << ")";
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") and (";
-      matchers_[i].DescribeNegationTo(os);
-    }
-    *os << ")";
-  }
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    std::string no_match_result;
-
-    // If either matcher1_ or matcher2_ matches x, we just need to
-    // explain why *one* of them matches.
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      StringMatchResultListener slistener;
-      if (matchers_[i].MatchAndExplain(x, &slistener)) {
-        *listener << slistener.str();
-        return true;
-      } else {
-        if (no_match_result.empty()) {
-          no_match_result = slistener.str();
-        } else {
-          std::string result = slistener.str();
-          if (!result.empty()) {
-            no_match_result += ", and ";
-            no_match_result += result;
-          }
-        }
-      }
-    }
-
-    // Otherwise we need to explain why *both* of them fail.
-    *listener << no_match_result;
-    return false;
-  }
-
- private:
-  const std::vector<Matcher<T> > matchers_;
-};
-
-// AnyOfMatcher is used for the variadic implementation of AnyOf(m_1, m_2, ...).
-template <typename... Args>
-using AnyOfMatcher = VariadicMatcher<AnyOfMatcherImpl, Args...>;
-
-// Wrapper for implementation of Any/AllOfArray().
-template <template <class> class MatcherImpl, typename T>
-class SomeOfArrayMatcher {
- public:
-  // Constructs the matcher from a sequence of element values or
-  // element matchers.
-  template <typename Iter>
-  SomeOfArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
-
-  template <typename U>
-  operator Matcher<U>() const {  // NOLINT
-    using RawU = typename std::decay<U>::type;
-    std::vector<Matcher<RawU>> matchers;
-    for (const auto& matcher : matchers_) {
-      matchers.push_back(MatcherCast<RawU>(matcher));
-    }
-    return Matcher<U>(new MatcherImpl<RawU>(std::move(matchers)));
-  }
-
- private:
-  const ::std::vector<T> matchers_;
-};
-
-template <typename T>
-using AllOfArrayMatcher = SomeOfArrayMatcher<AllOfMatcherImpl, T>;
-
-template <typename T>
-using AnyOfArrayMatcher = SomeOfArrayMatcher<AnyOfMatcherImpl, T>;
-
-// Used for implementing Truly(pred), which turns a predicate into a
-// matcher.
-template <typename Predicate>
-class TrulyMatcher {
- public:
-  explicit TrulyMatcher(Predicate pred) : predicate_(pred) {}
-
-  // This method template allows Truly(pred) to be used as a matcher
-  // for type T where T is the argument type of predicate 'pred'.  The
-  // argument is passed by reference as the predicate may be
-  // interested in the address of the argument.
-  template <typename T>
-  bool MatchAndExplain(T& x,  // NOLINT
-                       MatchResultListener* listener) const {
-    // Without the if-statement, MSVC sometimes warns about converting
-    // a value to bool (warning 4800).
-    //
-    // We cannot write 'return !!predicate_(x);' as that doesn't work
-    // when predicate_(x) returns a class convertible to bool but
-    // having no operator!().
-    if (predicate_(x))
-      return true;
-    *listener << "didn't satisfy the given predicate";
-    return false;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "satisfies the given predicate";
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't satisfy the given predicate";
-  }
-
- private:
-  Predicate predicate_;
-};
-
-// Used for implementing Matches(matcher), which turns a matcher into
-// a predicate.
-template <typename M>
-class MatcherAsPredicate {
- public:
-  explicit MatcherAsPredicate(M matcher) : matcher_(matcher) {}
-
-  // This template operator() allows Matches(m) to be used as a
-  // predicate on type T where m is a matcher on type T.
-  //
-  // The argument x is passed by reference instead of by value, as
-  // some matcher may be interested in its address (e.g. as in
-  // Matches(Ref(n))(x)).
-  template <typename T>
-  bool operator()(const T& x) const {
-    // We let matcher_ commit to a particular type here instead of
-    // when the MatcherAsPredicate object was constructed.  This
-    // allows us to write Matches(m) where m is a polymorphic matcher
-    // (e.g. Eq(5)).
-    //
-    // If we write Matcher<T>(matcher_).Matches(x) here, it won't
-    // compile when matcher_ has type Matcher<const T&>; if we write
-    // Matcher<const T&>(matcher_).Matches(x) here, it won't compile
-    // when matcher_ has type Matcher<T>; if we just write
-    // matcher_.Matches(x), it won't compile when matcher_ is
-    // polymorphic, e.g. Eq(5).
-    //
-    // MatcherCast<const T&>() is necessary for making the code work
-    // in all of the above situations.
-    return MatcherCast<const T&>(matcher_).Matches(x);
-  }
-
- private:
-  M matcher_;
-};
-
-// For implementing ASSERT_THAT() and EXPECT_THAT().  The template
-// argument M must be a type that can be converted to a matcher.
-template <typename M>
-class PredicateFormatterFromMatcher {
- public:
-  explicit PredicateFormatterFromMatcher(M m) : matcher_(std::move(m)) {}
-
-  // This template () operator allows a PredicateFormatterFromMatcher
-  // object to act as a predicate-formatter suitable for using with
-  // Google Test's EXPECT_PRED_FORMAT1() macro.
-  template <typename T>
-  AssertionResult operator()(const char* value_text, const T& x) const {
-    // We convert matcher_ to a Matcher<const T&> *now* instead of
-    // when the PredicateFormatterFromMatcher object was constructed,
-    // as matcher_ may be polymorphic (e.g. NotNull()) and we won't
-    // know which type to instantiate it to until we actually see the
-    // type of x here.
-    //
-    // We write SafeMatcherCast<const T&>(matcher_) instead of
-    // Matcher<const T&>(matcher_), as the latter won't compile when
-    // matcher_ has type Matcher<T> (e.g. An<int>()).
-    // We don't write MatcherCast<const T&> either, as that allows
-    // potentially unsafe downcasting of the matcher argument.
-    const Matcher<const T&> matcher = SafeMatcherCast<const T&>(matcher_);
-
-    // The expected path here is that the matcher should match (i.e. that most
-    // tests pass) so optimize for this case.
-    if (matcher.Matches(x)) {
-      return AssertionSuccess();
-    }
-
-    ::std::stringstream ss;
-    ss << "Value of: " << value_text << "\n"
-       << "Expected: ";
-    matcher.DescribeTo(&ss);
-
-    // Rerun the matcher to "PrintAndExplain" the failure.
-    StringMatchResultListener listener;
-    if (MatchPrintAndExplain(x, matcher, &listener)) {
-      ss << "\n  The matcher failed on the initial attempt; but passed when "
-            "rerun to generate the explanation.";
-    }
-    ss << "\n  Actual: " << listener.str();
-    return AssertionFailure() << ss.str();
-  }
-
- private:
-  const M matcher_;
-};
-
-// A helper function for converting a matcher to a predicate-formatter
-// without the user needing to explicitly write the type.  This is
-// used for implementing ASSERT_THAT() and EXPECT_THAT().
-// Implementation detail: 'matcher' is received by-value to force decaying.
-template <typename M>
-inline PredicateFormatterFromMatcher<M>
-MakePredicateFormatterFromMatcher(M matcher) {
-  return PredicateFormatterFromMatcher<M>(std::move(matcher));
-}
-
-// Implements the polymorphic IsNan() matcher, which matches any floating type
-// value that is Nan.
-class IsNanMatcher {
- public:
-  template <typename FloatType>
-  bool MatchAndExplain(const FloatType& f,
-                       MatchResultListener* /* listener */) const {
-    return (::std::isnan)(f);
-  }
-
-  void DescribeTo(::std::ostream* os) const { *os << "is NaN"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "isn't NaN";
-  }
-};
-
-// Implements the polymorphic floating point equality matcher, which matches
-// two float values using ULP-based approximation or, optionally, a
-// user-specified epsilon.  The template is meant to be instantiated with
-// FloatType being either float or double.
-template <typename FloatType>
-class FloatingEqMatcher {
- public:
-  // Constructor for FloatingEqMatcher.
-  // The matcher's input will be compared with expected.  The matcher treats two
-  // NANs as equal if nan_eq_nan is true.  Otherwise, under IEEE standards,
-  // equality comparisons between NANs will always return false.  We specify a
-  // negative max_abs_error_ term to indicate that ULP-based approximation will
-  // be used for comparison.
-  FloatingEqMatcher(FloatType expected, bool nan_eq_nan) :
-    expected_(expected), nan_eq_nan_(nan_eq_nan), max_abs_error_(-1) {
-  }
-
-  // Constructor that supports a user-specified max_abs_error that will be used
-  // for comparison instead of ULP-based approximation.  The max absolute
-  // should be non-negative.
-  FloatingEqMatcher(FloatType expected, bool nan_eq_nan,
-                    FloatType max_abs_error)
-      : expected_(expected),
-        nan_eq_nan_(nan_eq_nan),
-        max_abs_error_(max_abs_error) {
-    GTEST_CHECK_(max_abs_error >= 0)
-        << ", where max_abs_error is" << max_abs_error;
-  }
-
-  // Implements floating point equality matcher as a Matcher<T>.
-  template <typename T>
-  class Impl : public MatcherInterface<T> {
-   public:
-    Impl(FloatType expected, bool nan_eq_nan, FloatType max_abs_error)
-        : expected_(expected),
-          nan_eq_nan_(nan_eq_nan),
-          max_abs_error_(max_abs_error) {}
-
-    bool MatchAndExplain(T value,
-                         MatchResultListener* listener) const override {
-      const FloatingPoint<FloatType> actual(value), expected(expected_);
-
-      // Compares NaNs first, if nan_eq_nan_ is true.
-      if (actual.is_nan() || expected.is_nan()) {
-        if (actual.is_nan() && expected.is_nan()) {
-          return nan_eq_nan_;
-        }
-        // One is nan; the other is not nan.
-        return false;
-      }
-      if (HasMaxAbsError()) {
-        // We perform an equality check so that inf will match inf, regardless
-        // of error bounds.  If the result of value - expected_ would result in
-        // overflow or if either value is inf, the default result is infinity,
-        // which should only match if max_abs_error_ is also infinity.
-        if (value == expected_) {
-          return true;
-        }
-
-        const FloatType diff = value - expected_;
-        if (::std::fabs(diff) <= max_abs_error_) {
-          return true;
-        }
-
-        if (listener->IsInterested()) {
-          *listener << "which is " << diff << " from " << expected_;
-        }
-        return false;
-      } else {
-        return actual.AlmostEquals(expected);
-      }
-    }
-
-    void DescribeTo(::std::ostream* os) const override {
-      // os->precision() returns the previously set precision, which we
-      // store to restore the ostream to its original configuration
-      // after outputting.
-      const ::std::streamsize old_precision = os->precision(
-          ::std::numeric_limits<FloatType>::digits10 + 2);
-      if (FloatingPoint<FloatType>(expected_).is_nan()) {
-        if (nan_eq_nan_) {
-          *os << "is NaN";
-        } else {
-          *os << "never matches";
-        }
-      } else {
-        *os << "is approximately " << expected_;
-        if (HasMaxAbsError()) {
-          *os << " (absolute error <= " << max_abs_error_ << ")";
-        }
-      }
-      os->precision(old_precision);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      // As before, get original precision.
-      const ::std::streamsize old_precision = os->precision(
-          ::std::numeric_limits<FloatType>::digits10 + 2);
-      if (FloatingPoint<FloatType>(expected_).is_nan()) {
-        if (nan_eq_nan_) {
-          *os << "isn't NaN";
-        } else {
-          *os << "is anything";
-        }
-      } else {
-        *os << "isn't approximately " << expected_;
-        if (HasMaxAbsError()) {
-          *os << " (absolute error > " << max_abs_error_ << ")";
-        }
-      }
-      // Restore original precision.
-      os->precision(old_precision);
-    }
-
-   private:
-    bool HasMaxAbsError() const {
-      return max_abs_error_ >= 0;
-    }
-
-    const FloatType expected_;
-    const bool nan_eq_nan_;
-    // max_abs_error will be used for value comparison when >= 0.
-    const FloatType max_abs_error_;
-  };
-
-  // The following 3 type conversion operators allow FloatEq(expected) and
-  // NanSensitiveFloatEq(expected) to be used as a Matcher<float>, a
-  // Matcher<const float&>, or a Matcher<float&>, but nothing else.
-  operator Matcher<FloatType>() const {
-    return MakeMatcher(
-        new Impl<FloatType>(expected_, nan_eq_nan_, max_abs_error_));
-  }
-
-  operator Matcher<const FloatType&>() const {
-    return MakeMatcher(
-        new Impl<const FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
-  }
-
-  operator Matcher<FloatType&>() const {
-    return MakeMatcher(
-        new Impl<FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
-  }
-
- private:
-  const FloatType expected_;
-  const bool nan_eq_nan_;
-  // max_abs_error will be used for value comparison when >= 0.
-  const FloatType max_abs_error_;
-};
-
-// A 2-tuple ("binary") wrapper around FloatingEqMatcher:
-// FloatingEq2Matcher() matches (x, y) by matching FloatingEqMatcher(x, false)
-// against y, and FloatingEq2Matcher(e) matches FloatingEqMatcher(x, false, e)
-// against y. The former implements "Eq", the latter "Near". At present, there
-// is no version that compares NaNs as equal.
-template <typename FloatType>
-class FloatingEq2Matcher {
- public:
-  FloatingEq2Matcher() { Init(-1, false); }
-
-  explicit FloatingEq2Matcher(bool nan_eq_nan) { Init(-1, nan_eq_nan); }
-
-  explicit FloatingEq2Matcher(FloatType max_abs_error) {
-    Init(max_abs_error, false);
-  }
-
-  FloatingEq2Matcher(FloatType max_abs_error, bool nan_eq_nan) {
-    Init(max_abs_error, nan_eq_nan);
-  }
-
-  template <typename T1, typename T2>
-  operator Matcher<::std::tuple<T1, T2>>() const {
-    return MakeMatcher(
-        new Impl<::std::tuple<T1, T2>>(max_abs_error_, nan_eq_nan_));
-  }
-  template <typename T1, typename T2>
-  operator Matcher<const ::std::tuple<T1, T2>&>() const {
-    return MakeMatcher(
-        new Impl<const ::std::tuple<T1, T2>&>(max_abs_error_, nan_eq_nan_));
-  }
-
- private:
-  static ::std::ostream& GetDesc(::std::ostream& os) {  // NOLINT
-    return os << "an almost-equal pair";
-  }
-
-  template <typename Tuple>
-  class Impl : public MatcherInterface<Tuple> {
-   public:
-    Impl(FloatType max_abs_error, bool nan_eq_nan) :
-        max_abs_error_(max_abs_error),
-        nan_eq_nan_(nan_eq_nan) {}
-
-    bool MatchAndExplain(Tuple args,
-                         MatchResultListener* listener) const override {
-      if (max_abs_error_ == -1) {
-        FloatingEqMatcher<FloatType> fm(::std::get<0>(args), nan_eq_nan_);
-        return static_cast<Matcher<FloatType>>(fm).MatchAndExplain(
-            ::std::get<1>(args), listener);
-      } else {
-        FloatingEqMatcher<FloatType> fm(::std::get<0>(args), nan_eq_nan_,
-                                        max_abs_error_);
-        return static_cast<Matcher<FloatType>>(fm).MatchAndExplain(
-            ::std::get<1>(args), listener);
-      }
-    }
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "are " << GetDesc;
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "aren't " << GetDesc;
-    }
-
-   private:
-    FloatType max_abs_error_;
-    const bool nan_eq_nan_;
-  };
-
-  void Init(FloatType max_abs_error_val, bool nan_eq_nan_val) {
-    max_abs_error_ = max_abs_error_val;
-    nan_eq_nan_ = nan_eq_nan_val;
-  }
-  FloatType max_abs_error_;
-  bool nan_eq_nan_;
-};
-
-// Implements the Pointee(m) matcher for matching a pointer whose
-// pointee matches matcher m.  The pointer can be either raw or smart.
-template <typename InnerMatcher>
-class PointeeMatcher {
- public:
-  explicit PointeeMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
-
-  // This type conversion operator template allows Pointee(m) to be
-  // used as a matcher for any pointer type whose pointee type is
-  // compatible with the inner matcher, where type Pointer can be
-  // either a raw pointer or a smart pointer.
-  //
-  // The reason we do this instead of relying on
-  // MakePolymorphicMatcher() is that the latter is not flexible
-  // enough for implementing the DescribeTo() method of Pointee().
-  template <typename Pointer>
-  operator Matcher<Pointer>() const {
-    return Matcher<Pointer>(new Impl<const Pointer&>(matcher_));
-  }
-
- private:
-  // The monomorphic implementation that works for a particular pointer type.
-  template <typename Pointer>
-  class Impl : public MatcherInterface<Pointer> {
-   public:
-    using Pointee =
-        typename std::pointer_traits<GTEST_REMOVE_REFERENCE_AND_CONST_(
-            Pointer)>::element_type;
-
-    explicit Impl(const InnerMatcher& matcher)
-        : matcher_(MatcherCast<const Pointee&>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "points to a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "does not point to a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(Pointer pointer,
-                         MatchResultListener* listener) const override {
-      if (GetRawPointer(pointer) == nullptr) return false;
-
-      *listener << "which points to ";
-      return MatchPrintAndExplain(*pointer, matcher_, listener);
-    }
-
-   private:
-    const Matcher<const Pointee&> matcher_;
-  };
-
-  const InnerMatcher matcher_;
-};
-
-// Implements the Pointer(m) matcher
-// Implements the Pointer(m) matcher for matching a pointer that matches matcher
-// m.  The pointer can be either raw or smart, and will match `m` against the
-// raw pointer.
-template <typename InnerMatcher>
-class PointerMatcher {
- public:
-  explicit PointerMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
-
-  // This type conversion operator template allows Pointer(m) to be
-  // used as a matcher for any pointer type whose pointer type is
-  // compatible with the inner matcher, where type PointerType can be
-  // either a raw pointer or a smart pointer.
-  //
-  // The reason we do this instead of relying on
-  // MakePolymorphicMatcher() is that the latter is not flexible
-  // enough for implementing the DescribeTo() method of Pointer().
-  template <typename PointerType>
-  operator Matcher<PointerType>() const {  // NOLINT
-    return Matcher<PointerType>(new Impl<const PointerType&>(matcher_));
-  }
-
- private:
-  // The monomorphic implementation that works for a particular pointer type.
-  template <typename PointerType>
-  class Impl : public MatcherInterface<PointerType> {
-   public:
-    using Pointer =
-        const typename std::pointer_traits<GTEST_REMOVE_REFERENCE_AND_CONST_(
-            PointerType)>::element_type*;
-
-    explicit Impl(const InnerMatcher& matcher)
-        : matcher_(MatcherCast<Pointer>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "is a pointer that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "is not a pointer that ";
-      matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(PointerType pointer,
-                         MatchResultListener* listener) const override {
-      *listener << "which is a pointer that ";
-      Pointer p = GetRawPointer(pointer);
-      return MatchPrintAndExplain(p, matcher_, listener);
-    }
-
-   private:
-    Matcher<Pointer> matcher_;
-  };
-
-  const InnerMatcher matcher_;
-};
-
-#if GTEST_HAS_RTTI
-// Implements the WhenDynamicCastTo<T>(m) matcher that matches a pointer or
-// reference that matches inner_matcher when dynamic_cast<T> is applied.
-// The result of dynamic_cast<To> is forwarded to the inner matcher.
-// If To is a pointer and the cast fails, the inner matcher will receive NULL.
-// If To is a reference and the cast fails, this matcher returns false
-// immediately.
-template <typename To>
-class WhenDynamicCastToMatcherBase {
- public:
-  explicit WhenDynamicCastToMatcherBase(const Matcher<To>& matcher)
-      : matcher_(matcher) {}
-
-  void DescribeTo(::std::ostream* os) const {
-    GetCastTypeDescription(os);
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    GetCastTypeDescription(os);
-    matcher_.DescribeNegationTo(os);
-  }
-
- protected:
-  const Matcher<To> matcher_;
-
-  static std::string GetToName() {
-    return GetTypeName<To>();
-  }
-
- private:
-  static void GetCastTypeDescription(::std::ostream* os) {
-    *os << "when dynamic_cast to " << GetToName() << ", ";
-  }
-};
-
-// Primary template.
-// To is a pointer. Cast and forward the result.
-template <typename To>
-class WhenDynamicCastToMatcher : public WhenDynamicCastToMatcherBase<To> {
- public:
-  explicit WhenDynamicCastToMatcher(const Matcher<To>& matcher)
-      : WhenDynamicCastToMatcherBase<To>(matcher) {}
-
-  template <typename From>
-  bool MatchAndExplain(From from, MatchResultListener* listener) const {
-    To to = dynamic_cast<To>(from);
-    return MatchPrintAndExplain(to, this->matcher_, listener);
-  }
-};
-
-// Specialize for references.
-// In this case we return false if the dynamic_cast fails.
-template <typename To>
-class WhenDynamicCastToMatcher<To&> : public WhenDynamicCastToMatcherBase<To&> {
- public:
-  explicit WhenDynamicCastToMatcher(const Matcher<To&>& matcher)
-      : WhenDynamicCastToMatcherBase<To&>(matcher) {}
-
-  template <typename From>
-  bool MatchAndExplain(From& from, MatchResultListener* listener) const {
-    // We don't want an std::bad_cast here, so do the cast with pointers.
-    To* to = dynamic_cast<To*>(&from);
-    if (to == nullptr) {
-      *listener << "which cannot be dynamic_cast to " << this->GetToName();
-      return false;
-    }
-    return MatchPrintAndExplain(*to, this->matcher_, listener);
-  }
-};
-#endif  // GTEST_HAS_RTTI
-
-// Implements the Field() matcher for matching a field (i.e. member
-// variable) of an object.
-template <typename Class, typename FieldType>
-class FieldMatcher {
- public:
-  FieldMatcher(FieldType Class::*field,
-               const Matcher<const FieldType&>& matcher)
-      : field_(field), matcher_(matcher), whose_field_("whose given field ") {}
-
-  FieldMatcher(const std::string& field_name, FieldType Class::*field,
-               const Matcher<const FieldType&>& matcher)
-      : field_(field),
-        matcher_(matcher),
-        whose_field_("whose field `" + field_name + "` ") {}
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "is an object " << whose_field_;
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "is an object " << whose_field_;
-    matcher_.DescribeNegationTo(os);
-  }
-
-  template <typename T>
-  bool MatchAndExplain(const T& value, MatchResultListener* listener) const {
-    // FIXME: The dispatch on std::is_pointer was introduced as a workaround for
-    // a compiler bug, and can now be removed.
-    return MatchAndExplainImpl(
-        typename std::is_pointer<typename std::remove_const<T>::type>::type(),
-        value, listener);
-  }
-
- private:
-  bool MatchAndExplainImpl(std::false_type /* is_not_pointer */,
-                           const Class& obj,
-                           MatchResultListener* listener) const {
-    *listener << whose_field_ << "is ";
-    return MatchPrintAndExplain(obj.*field_, matcher_, listener);
-  }
-
-  bool MatchAndExplainImpl(std::true_type /* is_pointer */, const Class* p,
-                           MatchResultListener* listener) const {
-    if (p == nullptr) return false;
-
-    *listener << "which points to an object ";
-    // Since *p has a field, it must be a class/struct/union type and
-    // thus cannot be a pointer.  Therefore we pass false_type() as
-    // the first argument.
-    return MatchAndExplainImpl(std::false_type(), *p, listener);
-  }
-
-  const FieldType Class::*field_;
-  const Matcher<const FieldType&> matcher_;
-
-  // Contains either "whose given field " if the name of the field is unknown
-  // or "whose field `name_of_field` " if the name is known.
-  const std::string whose_field_;
-};
-
-// Implements the Property() matcher for matching a property
-// (i.e. return value of a getter method) of an object.
-//
-// Property is a const-qualified member function of Class returning
-// PropertyType.
-template <typename Class, typename PropertyType, typename Property>
-class PropertyMatcher {
- public:
-  typedef const PropertyType& RefToConstProperty;
-
-  PropertyMatcher(Property property, const Matcher<RefToConstProperty>& matcher)
-      : property_(property),
-        matcher_(matcher),
-        whose_property_("whose given property ") {}
-
-  PropertyMatcher(const std::string& property_name, Property property,
-                  const Matcher<RefToConstProperty>& matcher)
-      : property_(property),
-        matcher_(matcher),
-        whose_property_("whose property `" + property_name + "` ") {}
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "is an object " << whose_property_;
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "is an object " << whose_property_;
-    matcher_.DescribeNegationTo(os);
-  }
-
-  template <typename T>
-  bool MatchAndExplain(const T&value, MatchResultListener* listener) const {
-    return MatchAndExplainImpl(
-        typename std::is_pointer<typename std::remove_const<T>::type>::type(),
-        value, listener);
-  }
-
- private:
-  bool MatchAndExplainImpl(std::false_type /* is_not_pointer */,
-                           const Class& obj,
-                           MatchResultListener* listener) const {
-    *listener << whose_property_ << "is ";
-    // Cannot pass the return value (for example, int) to MatchPrintAndExplain,
-    // which takes a non-const reference as argument.
-    RefToConstProperty result = (obj.*property_)();
-    return MatchPrintAndExplain(result, matcher_, listener);
-  }
-
-  bool MatchAndExplainImpl(std::true_type /* is_pointer */, const Class* p,
-                           MatchResultListener* listener) const {
-    if (p == nullptr) return false;
-
-    *listener << "which points to an object ";
-    // Since *p has a property method, it must be a class/struct/union
-    // type and thus cannot be a pointer.  Therefore we pass
-    // false_type() as the first argument.
-    return MatchAndExplainImpl(std::false_type(), *p, listener);
-  }
-
-  Property property_;
-  const Matcher<RefToConstProperty> matcher_;
-
-  // Contains either "whose given property " if the name of the property is
-  // unknown or "whose property `name_of_property` " if the name is known.
-  const std::string whose_property_;
-};
-
-// Type traits specifying various features of different functors for ResultOf.
-// The default template specifies features for functor objects.
-template <typename Functor>
-struct CallableTraits {
-  typedef Functor StorageType;
-
-  static void CheckIsValid(Functor /* functor */) {}
-
-  template <typename T>
-  static auto Invoke(Functor f, const T& arg) -> decltype(f(arg)) {
-    return f(arg);
-  }
-};
-
-// Specialization for function pointers.
-template <typename ArgType, typename ResType>
-struct CallableTraits<ResType(*)(ArgType)> {
-  typedef ResType ResultType;
-  typedef ResType(*StorageType)(ArgType);
-
-  static void CheckIsValid(ResType(*f)(ArgType)) {
-    GTEST_CHECK_(f != nullptr)
-        << "NULL function pointer is passed into ResultOf().";
-  }
-  template <typename T>
-  static ResType Invoke(ResType(*f)(ArgType), T arg) {
-    return (*f)(arg);
-  }
-};
-
-// Implements the ResultOf() matcher for matching a return value of a
-// unary function of an object.
-template <typename Callable, typename InnerMatcher>
-class ResultOfMatcher {
- public:
-  ResultOfMatcher(Callable callable, InnerMatcher matcher)
-      : callable_(std::move(callable)), matcher_(std::move(matcher)) {
-    CallableTraits<Callable>::CheckIsValid(callable_);
-  }
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new Impl<const T&>(callable_, matcher_));
-  }
-
- private:
-  typedef typename CallableTraits<Callable>::StorageType CallableStorageType;
-
-  template <typename T>
-  class Impl : public MatcherInterface<T> {
-    using ResultType = decltype(CallableTraits<Callable>::template Invoke<T>(
-        std::declval<CallableStorageType>(), std::declval<T>()));
-
-   public:
-    template <typename M>
-    Impl(const CallableStorageType& callable, const M& matcher)
-        : callable_(callable), matcher_(MatcherCast<ResultType>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "is mapped by the given callable to a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "is mapped by the given callable to a value that ";
-      matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(T obj, MatchResultListener* listener) const override {
-      *listener << "which is mapped by the given callable to ";
-      // Cannot pass the return value directly to MatchPrintAndExplain, which
-      // takes a non-const reference as argument.
-      // Also, specifying template argument explicitly is needed because T could
-      // be a non-const reference (e.g. Matcher<Uncopyable&>).
-      ResultType result =
-          CallableTraits<Callable>::template Invoke<T>(callable_, obj);
-      return MatchPrintAndExplain(result, matcher_, listener);
-    }
-
-   private:
-    // Functors often define operator() as non-const method even though
-    // they are actually stateless. But we need to use them even when
-    // 'this' is a const pointer. It's the user's responsibility not to
-    // use stateful callables with ResultOf(), which doesn't guarantee
-    // how many times the callable will be invoked.
-    mutable CallableStorageType callable_;
-    const Matcher<ResultType> matcher_;
-  };  // class Impl
-
-  const CallableStorageType callable_;
-  const InnerMatcher matcher_;
-};
-
-// Implements a matcher that checks the size of an STL-style container.
-template <typename SizeMatcher>
-class SizeIsMatcher {
- public:
-  explicit SizeIsMatcher(const SizeMatcher& size_matcher)
-       : size_matcher_(size_matcher) {
-  }
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(new Impl<const Container&>(size_matcher_));
-  }
-
-  template <typename Container>
-  class Impl : public MatcherInterface<Container> {
-   public:
-    using SizeType = decltype(std::declval<Container>().size());
-    explicit Impl(const SizeMatcher& size_matcher)
-        : size_matcher_(MatcherCast<SizeType>(size_matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "size ";
-      size_matcher_.DescribeTo(os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "size ";
-      size_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(Container container,
-                         MatchResultListener* listener) const override {
-      SizeType size = container.size();
-      StringMatchResultListener size_listener;
-      const bool result = size_matcher_.MatchAndExplain(size, &size_listener);
-      *listener
-          << "whose size " << size << (result ? " matches" : " doesn't match");
-      PrintIfNotEmpty(size_listener.str(), listener->stream());
-      return result;
-    }
-
-   private:
-    const Matcher<SizeType> size_matcher_;
-  };
-
- private:
-  const SizeMatcher size_matcher_;
-};
-
-// Implements a matcher that checks the begin()..end() distance of an STL-style
-// container.
-template <typename DistanceMatcher>
-class BeginEndDistanceIsMatcher {
- public:
-  explicit BeginEndDistanceIsMatcher(const DistanceMatcher& distance_matcher)
-      : distance_matcher_(distance_matcher) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(new Impl<const Container&>(distance_matcher_));
-  }
-
-  template <typename Container>
-  class Impl : public MatcherInterface<Container> {
-   public:
-    typedef internal::StlContainerView<
-        GTEST_REMOVE_REFERENCE_AND_CONST_(Container)> ContainerView;
-    typedef typename std::iterator_traits<
-        typename ContainerView::type::const_iterator>::difference_type
-        DistanceType;
-    explicit Impl(const DistanceMatcher& distance_matcher)
-        : distance_matcher_(MatcherCast<DistanceType>(distance_matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "distance between begin() and end() ";
-      distance_matcher_.DescribeTo(os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "distance between begin() and end() ";
-      distance_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(Container container,
-                         MatchResultListener* listener) const override {
-      using std::begin;
-      using std::end;
-      DistanceType distance = std::distance(begin(container), end(container));
-      StringMatchResultListener distance_listener;
-      const bool result =
-          distance_matcher_.MatchAndExplain(distance, &distance_listener);
-      *listener << "whose distance between begin() and end() " << distance
-                << (result ? " matches" : " doesn't match");
-      PrintIfNotEmpty(distance_listener.str(), listener->stream());
-      return result;
-    }
-
-   private:
-    const Matcher<DistanceType> distance_matcher_;
-  };
-
- private:
-  const DistanceMatcher distance_matcher_;
-};
-
-// Implements an equality matcher for any STL-style container whose elements
-// support ==. This matcher is like Eq(), but its failure explanations provide
-// more detailed information that is useful when the container is used as a set.
-// The failure message reports elements that are in one of the operands but not
-// the other. The failure messages do not report duplicate or out-of-order
-// elements in the containers (which don't properly matter to sets, but can
-// occur if the containers are vectors or lists, for example).
-//
-// Uses the container's const_iterator, value_type, operator ==,
-// begin(), and end().
-template <typename Container>
-class ContainerEqMatcher {
- public:
-  typedef internal::StlContainerView<Container> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-
-  static_assert(!std::is_const<Container>::value,
-                "Container type must not be const");
-  static_assert(!std::is_reference<Container>::value,
-                "Container type must not be a reference");
-
-  // We make a copy of expected in case the elements in it are modified
-  // after this matcher is created.
-  explicit ContainerEqMatcher(const Container& expected)
-      : expected_(View::Copy(expected)) {}
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "equals ";
-    UniversalPrint(expected_, os);
-  }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "does not equal ";
-    UniversalPrint(expected_, os);
-  }
-
-  template <typename LhsContainer>
-  bool MatchAndExplain(const LhsContainer& lhs,
-                       MatchResultListener* listener) const {
-    typedef internal::StlContainerView<
-        typename std::remove_const<LhsContainer>::type>
-        LhsView;
-    typedef typename LhsView::type LhsStlContainer;
-    StlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
-    if (lhs_stl_container == expected_)
-      return true;
-
-    ::std::ostream* const os = listener->stream();
-    if (os != nullptr) {
-      // Something is different. Check for extra values first.
-      bool printed_header = false;
-      for (typename LhsStlContainer::const_iterator it =
-               lhs_stl_container.begin();
-           it != lhs_stl_container.end(); ++it) {
-        if (internal::ArrayAwareFind(expected_.begin(), expected_.end(), *it) ==
-            expected_.end()) {
-          if (printed_header) {
-            *os << ", ";
-          } else {
-            *os << "which has these unexpected elements: ";
-            printed_header = true;
-          }
-          UniversalPrint(*it, os);
-        }
-      }
-
-      // Now check for missing values.
-      bool printed_header2 = false;
-      for (typename StlContainer::const_iterator it = expected_.begin();
-           it != expected_.end(); ++it) {
-        if (internal::ArrayAwareFind(
-                lhs_stl_container.begin(), lhs_stl_container.end(), *it) ==
-            lhs_stl_container.end()) {
-          if (printed_header2) {
-            *os << ", ";
-          } else {
-            *os << (printed_header ? ",\nand" : "which")
-                << " doesn't have these expected elements: ";
-            printed_header2 = true;
-          }
-          UniversalPrint(*it, os);
-        }
-      }
-    }
-
-    return false;
-  }
-
- private:
-  const StlContainer expected_;
-};
-
-// A comparator functor that uses the < operator to compare two values.
-struct LessComparator {
-  template <typename T, typename U>
-  bool operator()(const T& lhs, const U& rhs) const { return lhs < rhs; }
-};
-
-// Implements WhenSortedBy(comparator, container_matcher).
-template <typename Comparator, typename ContainerMatcher>
-class WhenSortedByMatcher {
- public:
-  WhenSortedByMatcher(const Comparator& comparator,
-                      const ContainerMatcher& matcher)
-      : comparator_(comparator), matcher_(matcher) {}
-
-  template <typename LhsContainer>
-  operator Matcher<LhsContainer>() const {
-    return MakeMatcher(new Impl<LhsContainer>(comparator_, matcher_));
-  }
-
-  template <typename LhsContainer>
-  class Impl : public MatcherInterface<LhsContainer> {
-   public:
-    typedef internal::StlContainerView<
-         GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
-    typedef typename LhsView::type LhsStlContainer;
-    typedef typename LhsView::const_reference LhsStlContainerReference;
-    // Transforms std::pair<const Key, Value> into std::pair<Key, Value>
-    // so that we can match associative containers.
-    typedef typename RemoveConstFromKey<
-        typename LhsStlContainer::value_type>::type LhsValue;
-
-    Impl(const Comparator& comparator, const ContainerMatcher& matcher)
-        : comparator_(comparator), matcher_(matcher) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "(when sorted) ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "(when sorted) ";
-      matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(LhsContainer lhs,
-                         MatchResultListener* listener) const override {
-      LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
-      ::std::vector<LhsValue> sorted_container(lhs_stl_container.begin(),
-                                               lhs_stl_container.end());
-      ::std::sort(
-           sorted_container.begin(), sorted_container.end(), comparator_);
-
-      if (!listener->IsInterested()) {
-        // If the listener is not interested, we do not need to
-        // construct the inner explanation.
-        return matcher_.Matches(sorted_container);
-      }
-
-      *listener << "which is ";
-      UniversalPrint(sorted_container, listener->stream());
-      *listener << " when sorted";
-
-      StringMatchResultListener inner_listener;
-      const bool match = matcher_.MatchAndExplain(sorted_container,
-                                                  &inner_listener);
-      PrintIfNotEmpty(inner_listener.str(), listener->stream());
-      return match;
-    }
-
-   private:
-    const Comparator comparator_;
-    const Matcher<const ::std::vector<LhsValue>&> matcher_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
-  };
-
- private:
-  const Comparator comparator_;
-  const ContainerMatcher matcher_;
-};
-
-// Implements Pointwise(tuple_matcher, rhs_container).  tuple_matcher
-// must be able to be safely cast to Matcher<std::tuple<const T1&, const
-// T2&> >, where T1 and T2 are the types of elements in the LHS
-// container and the RHS container respectively.
-template <typename TupleMatcher, typename RhsContainer>
-class PointwiseMatcher {
-  GTEST_COMPILE_ASSERT_(
-      !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(RhsContainer)>::value,
-      use_UnorderedPointwise_with_hash_tables);
-
- public:
-  typedef internal::StlContainerView<RhsContainer> RhsView;
-  typedef typename RhsView::type RhsStlContainer;
-  typedef typename RhsStlContainer::value_type RhsValue;
-
-  static_assert(!std::is_const<RhsContainer>::value,
-                "RhsContainer type must not be const");
-  static_assert(!std::is_reference<RhsContainer>::value,
-                "RhsContainer type must not be a reference");
-
-  // Like ContainerEq, we make a copy of rhs in case the elements in
-  // it are modified after this matcher is created.
-  PointwiseMatcher(const TupleMatcher& tuple_matcher, const RhsContainer& rhs)
-      : tuple_matcher_(tuple_matcher), rhs_(RhsView::Copy(rhs)) {}
-
-  template <typename LhsContainer>
-  operator Matcher<LhsContainer>() const {
-    GTEST_COMPILE_ASSERT_(
-        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)>::value,
-        use_UnorderedPointwise_with_hash_tables);
-
-    return Matcher<LhsContainer>(
-        new Impl<const LhsContainer&>(tuple_matcher_, rhs_));
-  }
-
-  template <typename LhsContainer>
-  class Impl : public MatcherInterface<LhsContainer> {
-   public:
-    typedef internal::StlContainerView<
-         GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
-    typedef typename LhsView::type LhsStlContainer;
-    typedef typename LhsView::const_reference LhsStlContainerReference;
-    typedef typename LhsStlContainer::value_type LhsValue;
-    // We pass the LHS value and the RHS value to the inner matcher by
-    // reference, as they may be expensive to copy.  We must use tuple
-    // instead of pair here, as a pair cannot hold references (C++ 98,
-    // 20.2.2 [lib.pairs]).
-    typedef ::std::tuple<const LhsValue&, const RhsValue&> InnerMatcherArg;
-
-    Impl(const TupleMatcher& tuple_matcher, const RhsStlContainer& rhs)
-        // mono_tuple_matcher_ holds a monomorphic version of the tuple matcher.
-        : mono_tuple_matcher_(SafeMatcherCast<InnerMatcherArg>(tuple_matcher)),
-          rhs_(rhs) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "contains " << rhs_.size()
-          << " values, where each value and its corresponding value in ";
-      UniversalPrinter<RhsStlContainer>::Print(rhs_, os);
-      *os << " ";
-      mono_tuple_matcher_.DescribeTo(os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "doesn't contain exactly " << rhs_.size()
-          << " values, or contains a value x at some index i"
-          << " where x and the i-th value of ";
-      UniversalPrint(rhs_, os);
-      *os << " ";
-      mono_tuple_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(LhsContainer lhs,
-                         MatchResultListener* listener) const override {
-      LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
-      const size_t actual_size = lhs_stl_container.size();
-      if (actual_size != rhs_.size()) {
-        *listener << "which contains " << actual_size << " values";
-        return false;
-      }
-
-      typename LhsStlContainer::const_iterator left = lhs_stl_container.begin();
-      typename RhsStlContainer::const_iterator right = rhs_.begin();
-      for (size_t i = 0; i != actual_size; ++i, ++left, ++right) {
-        if (listener->IsInterested()) {
-          StringMatchResultListener inner_listener;
-          // Create InnerMatcherArg as a temporarily object to avoid it outlives
-          // *left and *right. Dereference or the conversion to `const T&` may
-          // return temp objects, e.g for vector<bool>.
-          if (!mono_tuple_matcher_.MatchAndExplain(
-                  InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
-                                  ImplicitCast_<const RhsValue&>(*right)),
-                  &inner_listener)) {
-            *listener << "where the value pair (";
-            UniversalPrint(*left, listener->stream());
-            *listener << ", ";
-            UniversalPrint(*right, listener->stream());
-            *listener << ") at index #" << i << " don't match";
-            PrintIfNotEmpty(inner_listener.str(), listener->stream());
-            return false;
-          }
-        } else {
-          if (!mono_tuple_matcher_.Matches(
-                  InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
-                                  ImplicitCast_<const RhsValue&>(*right))))
-            return false;
-        }
-      }
-
-      return true;
-    }
-
-   private:
-    const Matcher<InnerMatcherArg> mono_tuple_matcher_;
-    const RhsStlContainer rhs_;
-  };
-
- private:
-  const TupleMatcher tuple_matcher_;
-  const RhsStlContainer rhs_;
-};
-
-// Holds the logic common to ContainsMatcherImpl and EachMatcherImpl.
-template <typename Container>
-class QuantifierMatcherImpl : public MatcherInterface<Container> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-  typedef StlContainerView<RawContainer> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-  typedef typename StlContainer::value_type Element;
-
-  template <typename InnerMatcher>
-  explicit QuantifierMatcherImpl(InnerMatcher inner_matcher)
-      : inner_matcher_(
-           testing::SafeMatcherCast<const Element&>(inner_matcher)) {}
-
-  // Checks whether:
-  // * All elements in the container match, if all_elements_should_match.
-  // * Any element in the container matches, if !all_elements_should_match.
-  bool MatchAndExplainImpl(bool all_elements_should_match,
-                           Container container,
-                           MatchResultListener* listener) const {
-    StlContainerReference stl_container = View::ConstReference(container);
-    size_t i = 0;
-    for (typename StlContainer::const_iterator it = stl_container.begin();
-         it != stl_container.end(); ++it, ++i) {
-      StringMatchResultListener inner_listener;
-      const bool matches = inner_matcher_.MatchAndExplain(*it, &inner_listener);
-
-      if (matches != all_elements_should_match) {
-        *listener << "whose element #" << i
-                  << (matches ? " matches" : " doesn't match");
-        PrintIfNotEmpty(inner_listener.str(), listener->stream());
-        return !all_elements_should_match;
-      }
-    }
-    return all_elements_should_match;
-  }
-
- protected:
-  const Matcher<const Element&> inner_matcher_;
-};
-
-// Implements Contains(element_matcher) for the given argument type Container.
-// Symmetric to EachMatcherImpl.
-template <typename Container>
-class ContainsMatcherImpl : public QuantifierMatcherImpl<Container> {
- public:
-  template <typename InnerMatcher>
-  explicit ContainsMatcherImpl(InnerMatcher inner_matcher)
-      : QuantifierMatcherImpl<Container>(inner_matcher) {}
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "contains at least one element that ";
-    this->inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "doesn't contain any element that ";
-    this->inner_matcher_.DescribeTo(os);
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    return this->MatchAndExplainImpl(false, container, listener);
-  }
-};
-
-// Implements Each(element_matcher) for the given argument type Container.
-// Symmetric to ContainsMatcherImpl.
-template <typename Container>
-class EachMatcherImpl : public QuantifierMatcherImpl<Container> {
- public:
-  template <typename InnerMatcher>
-  explicit EachMatcherImpl(InnerMatcher inner_matcher)
-      : QuantifierMatcherImpl<Container>(inner_matcher) {}
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "only contains elements that ";
-    this->inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "contains some element that ";
-    this->inner_matcher_.DescribeNegationTo(os);
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    return this->MatchAndExplainImpl(true, container, listener);
-  }
-};
-
-// Implements polymorphic Contains(element_matcher).
-template <typename M>
-class ContainsMatcher {
- public:
-  explicit ContainsMatcher(M m) : inner_matcher_(m) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(
-        new ContainsMatcherImpl<const Container&>(inner_matcher_));
-  }
-
- private:
-  const M inner_matcher_;
-};
-
-// Implements polymorphic Each(element_matcher).
-template <typename M>
-class EachMatcher {
- public:
-  explicit EachMatcher(M m) : inner_matcher_(m) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(
-        new EachMatcherImpl<const Container&>(inner_matcher_));
-  }
-
- private:
-  const M inner_matcher_;
-};
-
-struct Rank1 {};
-struct Rank0 : Rank1 {};
-
-namespace pair_getters {
-using std::get;
-template <typename T>
-auto First(T& x, Rank1) -> decltype(get<0>(x)) {  // NOLINT
-  return get<0>(x);
-}
-template <typename T>
-auto First(T& x, Rank0) -> decltype((x.first)) {  // NOLINT
-  return x.first;
-}
-
-template <typename T>
-auto Second(T& x, Rank1) -> decltype(get<1>(x)) {  // NOLINT
-  return get<1>(x);
-}
-template <typename T>
-auto Second(T& x, Rank0) -> decltype((x.second)) {  // NOLINT
-  return x.second;
-}
-}  // namespace pair_getters
-
-// Implements Key(inner_matcher) for the given argument pair type.
-// Key(inner_matcher) matches an std::pair whose 'first' field matches
-// inner_matcher.  For example, Contains(Key(Ge(5))) can be used to match an
-// std::map that contains at least one element whose key is >= 5.
-template <typename PairType>
-class KeyMatcherImpl : public MatcherInterface<PairType> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
-  typedef typename RawPairType::first_type KeyType;
-
-  template <typename InnerMatcher>
-  explicit KeyMatcherImpl(InnerMatcher inner_matcher)
-      : inner_matcher_(
-          testing::SafeMatcherCast<const KeyType&>(inner_matcher)) {
-  }
-
-  // Returns true if and only if 'key_value.first' (the key) matches the inner
-  // matcher.
-  bool MatchAndExplain(PairType key_value,
-                       MatchResultListener* listener) const override {
-    StringMatchResultListener inner_listener;
-    const bool match = inner_matcher_.MatchAndExplain(
-        pair_getters::First(key_value, Rank0()), &inner_listener);
-    const std::string explanation = inner_listener.str();
-    if (explanation != "") {
-      *listener << "whose first field is a value " << explanation;
-    }
-    return match;
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "has a key that ";
-    inner_matcher_.DescribeTo(os);
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "doesn't have a key that ";
-    inner_matcher_.DescribeTo(os);
-  }
-
- private:
-  const Matcher<const KeyType&> inner_matcher_;
-};
-
-// Implements polymorphic Key(matcher_for_key).
-template <typename M>
-class KeyMatcher {
- public:
-  explicit KeyMatcher(M m) : matcher_for_key_(m) {}
-
-  template <typename PairType>
-  operator Matcher<PairType>() const {
-    return Matcher<PairType>(
-        new KeyMatcherImpl<const PairType&>(matcher_for_key_));
-  }
-
- private:
-  const M matcher_for_key_;
-};
-
-// Implements polymorphic Address(matcher_for_address).
-template <typename InnerMatcher>
-class AddressMatcher {
- public:
-  explicit AddressMatcher(InnerMatcher m) : matcher_(m) {}
-
-  template <typename Type>
-  operator Matcher<Type>() const {  // NOLINT
-    return Matcher<Type>(new Impl<const Type&>(matcher_));
-  }
-
- private:
-  // The monomorphic implementation that works for a particular object type.
-  template <typename Type>
-  class Impl : public MatcherInterface<Type> {
-   public:
-    using Address = const GTEST_REMOVE_REFERENCE_AND_CONST_(Type) *;
-    explicit Impl(const InnerMatcher& matcher)
-        : matcher_(MatcherCast<Address>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "has address that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "does not have address that ";
-      matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(Type object,
-                         MatchResultListener* listener) const override {
-      *listener << "which has address ";
-      Address address = std::addressof(object);
-      return MatchPrintAndExplain(address, matcher_, listener);
-    }
-
-   private:
-    const Matcher<Address> matcher_;
-  };
-  const InnerMatcher matcher_;
-};
-
-// Implements Pair(first_matcher, second_matcher) for the given argument pair
-// type with its two matchers. See Pair() function below.
-template <typename PairType>
-class PairMatcherImpl : public MatcherInterface<PairType> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
-  typedef typename RawPairType::first_type FirstType;
-  typedef typename RawPairType::second_type SecondType;
-
-  template <typename FirstMatcher, typename SecondMatcher>
-  PairMatcherImpl(FirstMatcher first_matcher, SecondMatcher second_matcher)
-      : first_matcher_(
-            testing::SafeMatcherCast<const FirstType&>(first_matcher)),
-        second_matcher_(
-            testing::SafeMatcherCast<const SecondType&>(second_matcher)) {
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "has a first field that ";
-    first_matcher_.DescribeTo(os);
-    *os << ", and has a second field that ";
-    second_matcher_.DescribeTo(os);
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "has a first field that ";
-    first_matcher_.DescribeNegationTo(os);
-    *os << ", or has a second field that ";
-    second_matcher_.DescribeNegationTo(os);
-  }
-
-  // Returns true if and only if 'a_pair.first' matches first_matcher and
-  // 'a_pair.second' matches second_matcher.
-  bool MatchAndExplain(PairType a_pair,
-                       MatchResultListener* listener) const override {
-    if (!listener->IsInterested()) {
-      // If the listener is not interested, we don't need to construct the
-      // explanation.
-      return first_matcher_.Matches(pair_getters::First(a_pair, Rank0())) &&
-             second_matcher_.Matches(pair_getters::Second(a_pair, Rank0()));
-    }
-    StringMatchResultListener first_inner_listener;
-    if (!first_matcher_.MatchAndExplain(pair_getters::First(a_pair, Rank0()),
-                                        &first_inner_listener)) {
-      *listener << "whose first field does not match";
-      PrintIfNotEmpty(first_inner_listener.str(), listener->stream());
-      return false;
-    }
-    StringMatchResultListener second_inner_listener;
-    if (!second_matcher_.MatchAndExplain(pair_getters::Second(a_pair, Rank0()),
-                                         &second_inner_listener)) {
-      *listener << "whose second field does not match";
-      PrintIfNotEmpty(second_inner_listener.str(), listener->stream());
-      return false;
-    }
-    ExplainSuccess(first_inner_listener.str(), second_inner_listener.str(),
-                   listener);
-    return true;
-  }
-
- private:
-  void ExplainSuccess(const std::string& first_explanation,
-                      const std::string& second_explanation,
-                      MatchResultListener* listener) const {
-    *listener << "whose both fields match";
-    if (first_explanation != "") {
-      *listener << ", where the first field is a value " << first_explanation;
-    }
-    if (second_explanation != "") {
-      *listener << ", ";
-      if (first_explanation != "") {
-        *listener << "and ";
-      } else {
-        *listener << "where ";
-      }
-      *listener << "the second field is a value " << second_explanation;
-    }
-  }
-
-  const Matcher<const FirstType&> first_matcher_;
-  const Matcher<const SecondType&> second_matcher_;
-};
-
-// Implements polymorphic Pair(first_matcher, second_matcher).
-template <typename FirstMatcher, typename SecondMatcher>
-class PairMatcher {
- public:
-  PairMatcher(FirstMatcher first_matcher, SecondMatcher second_matcher)
-      : first_matcher_(first_matcher), second_matcher_(second_matcher) {}
-
-  template <typename PairType>
-  operator Matcher<PairType> () const {
-    return Matcher<PairType>(
-        new PairMatcherImpl<const PairType&>(first_matcher_, second_matcher_));
-  }
-
- private:
-  const FirstMatcher first_matcher_;
-  const SecondMatcher second_matcher_;
-};
-
-template <typename T, size_t... I>
-auto UnpackStructImpl(const T& t, IndexSequence<I...>, int)
-    -> decltype(std::tie(get<I>(t)...)) {
-  static_assert(std::tuple_size<T>::value == sizeof...(I),
-                "Number of arguments doesn't match the number of fields.");
-  return std::tie(get<I>(t)...);
-}
-
-#if defined(__cpp_structured_bindings) && __cpp_structured_bindings >= 201606
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<1>, char) {
-  const auto& [a] = t;
-  return std::tie(a);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<2>, char) {
-  const auto& [a, b] = t;
-  return std::tie(a, b);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<3>, char) {
-  const auto& [a, b, c] = t;
-  return std::tie(a, b, c);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<4>, char) {
-  const auto& [a, b, c, d] = t;
-  return std::tie(a, b, c, d);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<5>, char) {
-  const auto& [a, b, c, d, e] = t;
-  return std::tie(a, b, c, d, e);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<6>, char) {
-  const auto& [a, b, c, d, e, f] = t;
-  return std::tie(a, b, c, d, e, f);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<7>, char) {
-  const auto& [a, b, c, d, e, f, g] = t;
-  return std::tie(a, b, c, d, e, f, g);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<8>, char) {
-  const auto& [a, b, c, d, e, f, g, h] = t;
-  return std::tie(a, b, c, d, e, f, g, h);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<9>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<10>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<11>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<12>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<13>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<14>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<15>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<16>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p);
-}
-#endif  // defined(__cpp_structured_bindings)
-
-template <size_t I, typename T>
-auto UnpackStruct(const T& t)
-    -> decltype((UnpackStructImpl)(t, MakeIndexSequence<I>{}, 0)) {
-  return (UnpackStructImpl)(t, MakeIndexSequence<I>{}, 0);
-}
-
-// Helper function to do comma folding in C++11.
-// The array ensures left-to-right order of evaluation.
-// Usage: VariadicExpand({expr...});
-template <typename T, size_t N>
-void VariadicExpand(const T (&)[N]) {}
-
-template <typename Struct, typename StructSize>
-class FieldsAreMatcherImpl;
-
-template <typename Struct, size_t... I>
-class FieldsAreMatcherImpl<Struct, IndexSequence<I...>>
-    : public MatcherInterface<Struct> {
-  using UnpackedType =
-      decltype(UnpackStruct<sizeof...(I)>(std::declval<const Struct&>()));
-  using MatchersType = std::tuple<
-      Matcher<const typename std::tuple_element<I, UnpackedType>::type&>...>;
-
- public:
-  template <typename Inner>
-  explicit FieldsAreMatcherImpl(const Inner& matchers)
-      : matchers_(testing::SafeMatcherCast<
-                  const typename std::tuple_element<I, UnpackedType>::type&>(
-            std::get<I>(matchers))...) {}
-
-  void DescribeTo(::std::ostream* os) const override {
-    const char* separator = "";
-    VariadicExpand(
-        {(*os << separator << "has field #" << I << " that ",
-          std::get<I>(matchers_).DescribeTo(os), separator = ", and ")...});
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    const char* separator = "";
-    VariadicExpand({(*os << separator << "has field #" << I << " that ",
-                     std::get<I>(matchers_).DescribeNegationTo(os),
-                     separator = ", or ")...});
-  }
-
-  bool MatchAndExplain(Struct t, MatchResultListener* listener) const override {
-    return MatchInternal((UnpackStruct<sizeof...(I)>)(t), listener);
-  }
-
- private:
-  bool MatchInternal(UnpackedType tuple, MatchResultListener* listener) const {
-    if (!listener->IsInterested()) {
-      // If the listener is not interested, we don't need to construct the
-      // explanation.
-      bool good = true;
-      VariadicExpand({good = good && std::get<I>(matchers_).Matches(
-                                         std::get<I>(tuple))...});
-      return good;
-    }
-
-    size_t failed_pos = ~size_t{};
-
-    std::vector<StringMatchResultListener> inner_listener(sizeof...(I));
-
-    VariadicExpand(
-        {failed_pos == ~size_t{} && !std::get<I>(matchers_).MatchAndExplain(
-                                        std::get<I>(tuple), &inner_listener[I])
-             ? failed_pos = I
-             : 0 ...});
-    if (failed_pos != ~size_t{}) {
-      *listener << "whose field #" << failed_pos << " does not match";
-      PrintIfNotEmpty(inner_listener[failed_pos].str(), listener->stream());
-      return false;
-    }
-
-    *listener << "whose all elements match";
-    const char* separator = ", where";
-    for (size_t index = 0; index < sizeof...(I); ++index) {
-      const std::string str = inner_listener[index].str();
-      if (!str.empty()) {
-        *listener << separator << " field #" << index << " is a value " << str;
-        separator = ", and";
-      }
-    }
-
-    return true;
-  }
-
-  MatchersType matchers_;
-};
-
-template <typename... Inner>
-class FieldsAreMatcher {
- public:
-  explicit FieldsAreMatcher(Inner... inner) : matchers_(std::move(inner)...) {}
-
-  template <typename Struct>
-  operator Matcher<Struct>() const {  // NOLINT
-    return Matcher<Struct>(
-        new FieldsAreMatcherImpl<const Struct&, IndexSequenceFor<Inner...>>(
-            matchers_));
-  }
-
- private:
-  std::tuple<Inner...> matchers_;
-};
-
-// Implements ElementsAre() and ElementsAreArray().
-template <typename Container>
-class ElementsAreMatcherImpl : public MatcherInterface<Container> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-  typedef internal::StlContainerView<RawContainer> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-  typedef typename StlContainer::value_type Element;
-
-  // Constructs the matcher from a sequence of element values or
-  // element matchers.
-  template <typename InputIter>
-  ElementsAreMatcherImpl(InputIter first, InputIter last) {
-    while (first != last) {
-      matchers_.push_back(MatcherCast<const Element&>(*first++));
-    }
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    if (count() == 0) {
-      *os << "is empty";
-    } else if (count() == 1) {
-      *os << "has 1 element that ";
-      matchers_[0].DescribeTo(os);
-    } else {
-      *os << "has " << Elements(count()) << " where\n";
-      for (size_t i = 0; i != count(); ++i) {
-        *os << "element #" << i << " ";
-        matchers_[i].DescribeTo(os);
-        if (i + 1 < count()) {
-          *os << ",\n";
-        }
-      }
-    }
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    if (count() == 0) {
-      *os << "isn't empty";
-      return;
-    }
-
-    *os << "doesn't have " << Elements(count()) << ", or\n";
-    for (size_t i = 0; i != count(); ++i) {
-      *os << "element #" << i << " ";
-      matchers_[i].DescribeNegationTo(os);
-      if (i + 1 < count()) {
-        *os << ", or\n";
-      }
-    }
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    // To work with stream-like "containers", we must only walk
-    // through the elements in one pass.
-
-    const bool listener_interested = listener->IsInterested();
-
-    // explanations[i] is the explanation of the element at index i.
-    ::std::vector<std::string> explanations(count());
-    StlContainerReference stl_container = View::ConstReference(container);
-    typename StlContainer::const_iterator it = stl_container.begin();
-    size_t exam_pos = 0;
-    bool mismatch_found = false;  // Have we found a mismatched element yet?
-
-    // Go through the elements and matchers in pairs, until we reach
-    // the end of either the elements or the matchers, or until we find a
-    // mismatch.
-    for (; it != stl_container.end() && exam_pos != count(); ++it, ++exam_pos) {
-      bool match;  // Does the current element match the current matcher?
-      if (listener_interested) {
-        StringMatchResultListener s;
-        match = matchers_[exam_pos].MatchAndExplain(*it, &s);
-        explanations[exam_pos] = s.str();
-      } else {
-        match = matchers_[exam_pos].Matches(*it);
-      }
-
-      if (!match) {
-        mismatch_found = true;
-        break;
-      }
-    }
-    // If mismatch_found is true, 'exam_pos' is the index of the mismatch.
-
-    // Find how many elements the actual container has.  We avoid
-    // calling size() s.t. this code works for stream-like "containers"
-    // that don't define size().
-    size_t actual_count = exam_pos;
-    for (; it != stl_container.end(); ++it) {
-      ++actual_count;
-    }
-
-    if (actual_count != count()) {
-      // The element count doesn't match.  If the container is empty,
-      // there's no need to explain anything as Google Mock already
-      // prints the empty container.  Otherwise we just need to show
-      // how many elements there actually are.
-      if (listener_interested && (actual_count != 0)) {
-        *listener << "which has " << Elements(actual_count);
-      }
-      return false;
-    }
-
-    if (mismatch_found) {
-      // The element count matches, but the exam_pos-th element doesn't match.
-      if (listener_interested) {
-        *listener << "whose element #" << exam_pos << " doesn't match";
-        PrintIfNotEmpty(explanations[exam_pos], listener->stream());
-      }
-      return false;
-    }
-
-    // Every element matches its expectation.  We need to explain why
-    // (the obvious ones can be skipped).
-    if (listener_interested) {
-      bool reason_printed = false;
-      for (size_t i = 0; i != count(); ++i) {
-        const std::string& s = explanations[i];
-        if (!s.empty()) {
-          if (reason_printed) {
-            *listener << ",\nand ";
-          }
-          *listener << "whose element #" << i << " matches, " << s;
-          reason_printed = true;
-        }
-      }
-    }
-    return true;
-  }
-
- private:
-  static Message Elements(size_t count) {
-    return Message() << count << (count == 1 ? " element" : " elements");
-  }
-
-  size_t count() const { return matchers_.size(); }
-
-  ::std::vector<Matcher<const Element&> > matchers_;
-};
-
-// Connectivity matrix of (elements X matchers), in element-major order.
-// Initially, there are no edges.
-// Use NextGraph() to iterate over all possible edge configurations.
-// Use Randomize() to generate a random edge configuration.
-class GTEST_API_ MatchMatrix {
- public:
-  MatchMatrix(size_t num_elements, size_t num_matchers)
-      : num_elements_(num_elements),
-        num_matchers_(num_matchers),
-        matched_(num_elements_* num_matchers_, 0) {
-  }
-
-  size_t LhsSize() const { return num_elements_; }
-  size_t RhsSize() const { return num_matchers_; }
-  bool HasEdge(size_t ilhs, size_t irhs) const {
-    return matched_[SpaceIndex(ilhs, irhs)] == 1;
-  }
-  void SetEdge(size_t ilhs, size_t irhs, bool b) {
-    matched_[SpaceIndex(ilhs, irhs)] = b ? 1 : 0;
-  }
-
-  // Treating the connectivity matrix as a (LhsSize()*RhsSize())-bit number,
-  // adds 1 to that number; returns false if incrementing the graph left it
-  // empty.
-  bool NextGraph();
-
-  void Randomize();
-
-  std::string DebugString() const;
-
- private:
-  size_t SpaceIndex(size_t ilhs, size_t irhs) const {
-    return ilhs * num_matchers_ + irhs;
-  }
-
-  size_t num_elements_;
-  size_t num_matchers_;
-
-  // Each element is a char interpreted as bool. They are stored as a
-  // flattened array in lhs-major order, use 'SpaceIndex()' to translate
-  // a (ilhs, irhs) matrix coordinate into an offset.
-  ::std::vector<char> matched_;
-};
-
-typedef ::std::pair<size_t, size_t> ElementMatcherPair;
-typedef ::std::vector<ElementMatcherPair> ElementMatcherPairs;
-
-// Returns a maximum bipartite matching for the specified graph 'g'.
-// The matching is represented as a vector of {element, matcher} pairs.
-GTEST_API_ ElementMatcherPairs
-FindMaxBipartiteMatching(const MatchMatrix& g);
-
-struct UnorderedMatcherRequire {
-  enum Flags {
-    Superset = 1 << 0,
-    Subset = 1 << 1,
-    ExactMatch = Superset | Subset,
-  };
-};
-
-// Untyped base class for implementing UnorderedElementsAre.  By
-// putting logic that's not specific to the element type here, we
-// reduce binary bloat and increase compilation speed.
-class GTEST_API_ UnorderedElementsAreMatcherImplBase {
- protected:
-  explicit UnorderedElementsAreMatcherImplBase(
-      UnorderedMatcherRequire::Flags matcher_flags)
-      : match_flags_(matcher_flags) {}
-
-  // A vector of matcher describers, one for each element matcher.
-  // Does not own the describers (and thus can be used only when the
-  // element matchers are alive).
-  typedef ::std::vector<const MatcherDescriberInterface*> MatcherDescriberVec;
-
-  // Describes this UnorderedElementsAre matcher.
-  void DescribeToImpl(::std::ostream* os) const;
-
-  // Describes the negation of this UnorderedElementsAre matcher.
-  void DescribeNegationToImpl(::std::ostream* os) const;
-
-  bool VerifyMatchMatrix(const ::std::vector<std::string>& element_printouts,
-                         const MatchMatrix& matrix,
-                         MatchResultListener* listener) const;
-
-  bool FindPairing(const MatchMatrix& matrix,
-                   MatchResultListener* listener) const;
-
-  MatcherDescriberVec& matcher_describers() {
-    return matcher_describers_;
-  }
-
-  static Message Elements(size_t n) {
-    return Message() << n << " element" << (n == 1 ? "" : "s");
-  }
-
-  UnorderedMatcherRequire::Flags match_flags() const { return match_flags_; }
-
- private:
-  UnorderedMatcherRequire::Flags match_flags_;
-  MatcherDescriberVec matcher_describers_;
-};
-
-// Implements UnorderedElementsAre, UnorderedElementsAreArray, IsSubsetOf, and
-// IsSupersetOf.
-template <typename Container>
-class UnorderedElementsAreMatcherImpl
-    : public MatcherInterface<Container>,
-      public UnorderedElementsAreMatcherImplBase {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-  typedef internal::StlContainerView<RawContainer> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-  typedef typename StlContainer::const_iterator StlContainerConstIterator;
-  typedef typename StlContainer::value_type Element;
-
-  template <typename InputIter>
-  UnorderedElementsAreMatcherImpl(UnorderedMatcherRequire::Flags matcher_flags,
-                                  InputIter first, InputIter last)
-      : UnorderedElementsAreMatcherImplBase(matcher_flags) {
-    for (; first != last; ++first) {
-      matchers_.push_back(MatcherCast<const Element&>(*first));
-    }
-    for (const auto& m : matchers_) {
-      matcher_describers().push_back(m.GetDescriber());
-    }
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    return UnorderedElementsAreMatcherImplBase::DescribeToImpl(os);
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    return UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(os);
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    StlContainerReference stl_container = View::ConstReference(container);
-    ::std::vector<std::string> element_printouts;
-    MatchMatrix matrix =
-        AnalyzeElements(stl_container.begin(), stl_container.end(),
-                        &element_printouts, listener);
-
-    if (matrix.LhsSize() == 0 && matrix.RhsSize() == 0) {
-      return true;
-    }
-
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      if (matrix.LhsSize() != matrix.RhsSize()) {
-        // The element count doesn't match.  If the container is empty,
-        // there's no need to explain anything as Google Mock already
-        // prints the empty container. Otherwise we just need to show
-        // how many elements there actually are.
-        if (matrix.LhsSize() != 0 && listener->IsInterested()) {
-          *listener << "which has " << Elements(matrix.LhsSize());
-        }
-        return false;
-      }
-    }
-
-    return VerifyMatchMatrix(element_printouts, matrix, listener) &&
-           FindPairing(matrix, listener);
-  }
-
- private:
-  template <typename ElementIter>
-  MatchMatrix AnalyzeElements(ElementIter elem_first, ElementIter elem_last,
-                              ::std::vector<std::string>* element_printouts,
-                              MatchResultListener* listener) const {
-    element_printouts->clear();
-    ::std::vector<char> did_match;
-    size_t num_elements = 0;
-    DummyMatchResultListener dummy;
-    for (; elem_first != elem_last; ++num_elements, ++elem_first) {
-      if (listener->IsInterested()) {
-        element_printouts->push_back(PrintToString(*elem_first));
-      }
-      for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
-        did_match.push_back(
-            matchers_[irhs].MatchAndExplain(*elem_first, &dummy));
-      }
-    }
-
-    MatchMatrix matrix(num_elements, matchers_.size());
-    ::std::vector<char>::const_iterator did_match_iter = did_match.begin();
-    for (size_t ilhs = 0; ilhs != num_elements; ++ilhs) {
-      for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
-        matrix.SetEdge(ilhs, irhs, *did_match_iter++ != 0);
-      }
-    }
-    return matrix;
-  }
-
-  ::std::vector<Matcher<const Element&> > matchers_;
-};
-
-// Functor for use in TransformTuple.
-// Performs MatcherCast<Target> on an input argument of any type.
-template <typename Target>
-struct CastAndAppendTransform {
-  template <typename Arg>
-  Matcher<Target> operator()(const Arg& a) const {
-    return MatcherCast<Target>(a);
-  }
-};
-
-// Implements UnorderedElementsAre.
-template <typename MatcherTuple>
-class UnorderedElementsAreMatcher {
- public:
-  explicit UnorderedElementsAreMatcher(const MatcherTuple& args)
-      : matchers_(args) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-    typedef typename internal::StlContainerView<RawContainer>::type View;
-    typedef typename View::value_type Element;
-    typedef ::std::vector<Matcher<const Element&> > MatcherVec;
-    MatcherVec matchers;
-    matchers.reserve(::std::tuple_size<MatcherTuple>::value);
-    TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
-                         ::std::back_inserter(matchers));
-    return Matcher<Container>(
-        new UnorderedElementsAreMatcherImpl<const Container&>(
-            UnorderedMatcherRequire::ExactMatch, matchers.begin(),
-            matchers.end()));
-  }
-
- private:
-  const MatcherTuple matchers_;
-};
-
-// Implements ElementsAre.
-template <typename MatcherTuple>
-class ElementsAreMatcher {
- public:
-  explicit ElementsAreMatcher(const MatcherTuple& args) : matchers_(args) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    GTEST_COMPILE_ASSERT_(
-        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value ||
-            ::std::tuple_size<MatcherTuple>::value < 2,
-        use_UnorderedElementsAre_with_hash_tables);
-
-    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-    typedef typename internal::StlContainerView<RawContainer>::type View;
-    typedef typename View::value_type Element;
-    typedef ::std::vector<Matcher<const Element&> > MatcherVec;
-    MatcherVec matchers;
-    matchers.reserve(::std::tuple_size<MatcherTuple>::value);
-    TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
-                         ::std::back_inserter(matchers));
-    return Matcher<Container>(new ElementsAreMatcherImpl<const Container&>(
-        matchers.begin(), matchers.end()));
-  }
-
- private:
-  const MatcherTuple matchers_;
-};
-
-// Implements UnorderedElementsAreArray(), IsSubsetOf(), and IsSupersetOf().
-template <typename T>
-class UnorderedElementsAreArrayMatcher {
- public:
-  template <typename Iter>
-  UnorderedElementsAreArrayMatcher(UnorderedMatcherRequire::Flags match_flags,
-                                   Iter first, Iter last)
-      : match_flags_(match_flags), matchers_(first, last) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(
-        new UnorderedElementsAreMatcherImpl<const Container&>(
-            match_flags_, matchers_.begin(), matchers_.end()));
-  }
-
- private:
-  UnorderedMatcherRequire::Flags match_flags_;
-  ::std::vector<T> matchers_;
-};
-
-// Implements ElementsAreArray().
-template <typename T>
-class ElementsAreArrayMatcher {
- public:
-  template <typename Iter>
-  ElementsAreArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    GTEST_COMPILE_ASSERT_(
-        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value,
-        use_UnorderedElementsAreArray_with_hash_tables);
-
-    return Matcher<Container>(new ElementsAreMatcherImpl<const Container&>(
-        matchers_.begin(), matchers_.end()));
-  }
-
- private:
-  const ::std::vector<T> matchers_;
-};
-
-// Given a 2-tuple matcher tm of type Tuple2Matcher and a value second
-// of type Second, BoundSecondMatcher<Tuple2Matcher, Second>(tm,
-// second) is a polymorphic matcher that matches a value x if and only if
-// tm matches tuple (x, second).  Useful for implementing
-// UnorderedPointwise() in terms of UnorderedElementsAreArray().
-//
-// BoundSecondMatcher is copyable and assignable, as we need to put
-// instances of this class in a vector when implementing
-// UnorderedPointwise().
-template <typename Tuple2Matcher, typename Second>
-class BoundSecondMatcher {
- public:
-  BoundSecondMatcher(const Tuple2Matcher& tm, const Second& second)
-      : tuple2_matcher_(tm), second_value_(second) {}
-
-  BoundSecondMatcher(const BoundSecondMatcher& other) = default;
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return MakeMatcher(new Impl<T>(tuple2_matcher_, second_value_));
-  }
-
-  // We have to define this for UnorderedPointwise() to compile in
-  // C++98 mode, as it puts BoundSecondMatcher instances in a vector,
-  // which requires the elements to be assignable in C++98.  The
-  // compiler cannot generate the operator= for us, as Tuple2Matcher
-  // and Second may not be assignable.
-  //
-  // However, this should never be called, so the implementation just
-  // need to assert.
-  void operator=(const BoundSecondMatcher& /*rhs*/) {
-    GTEST_LOG_(FATAL) << "BoundSecondMatcher should never be assigned.";
-  }
-
- private:
-  template <typename T>
-  class Impl : public MatcherInterface<T> {
-   public:
-    typedef ::std::tuple<T, Second> ArgTuple;
-
-    Impl(const Tuple2Matcher& tm, const Second& second)
-        : mono_tuple2_matcher_(SafeMatcherCast<const ArgTuple&>(tm)),
-          second_value_(second) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "and ";
-      UniversalPrint(second_value_, os);
-      *os << " ";
-      mono_tuple2_matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
-      return mono_tuple2_matcher_.MatchAndExplain(ArgTuple(x, second_value_),
-                                                  listener);
-    }
-
-   private:
-    const Matcher<const ArgTuple&> mono_tuple2_matcher_;
-    const Second second_value_;
-  };
-
-  const Tuple2Matcher tuple2_matcher_;
-  const Second second_value_;
-};
-
-// Given a 2-tuple matcher tm and a value second,
-// MatcherBindSecond(tm, second) returns a matcher that matches a
-// value x if and only if tm matches tuple (x, second).  Useful for
-// implementing UnorderedPointwise() in terms of UnorderedElementsAreArray().
-template <typename Tuple2Matcher, typename Second>
-BoundSecondMatcher<Tuple2Matcher, Second> MatcherBindSecond(
-    const Tuple2Matcher& tm, const Second& second) {
-  return BoundSecondMatcher<Tuple2Matcher, Second>(tm, second);
-}
-
-// Returns the description for a matcher defined using the MATCHER*()
-// macro where the user-supplied description string is "", if
-// 'negation' is false; otherwise returns the description of the
-// negation of the matcher.  'param_values' contains a list of strings
-// that are the print-out of the matcher's parameters.
-GTEST_API_ std::string FormatMatcherDescription(bool negation,
-                                                const char* matcher_name,
-                                                const Strings& param_values);
-
-// Implements a matcher that checks the value of a optional<> type variable.
-template <typename ValueMatcher>
-class OptionalMatcher {
- public:
-  explicit OptionalMatcher(const ValueMatcher& value_matcher)
-      : value_matcher_(value_matcher) {}
-
-  template <typename Optional>
-  operator Matcher<Optional>() const {
-    return Matcher<Optional>(new Impl<const Optional&>(value_matcher_));
-  }
-
-  template <typename Optional>
-  class Impl : public MatcherInterface<Optional> {
-   public:
-    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Optional) OptionalView;
-    typedef typename OptionalView::value_type ValueType;
-    explicit Impl(const ValueMatcher& value_matcher)
-        : value_matcher_(MatcherCast<ValueType>(value_matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "value ";
-      value_matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "value ";
-      value_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(Optional optional,
-                         MatchResultListener* listener) const override {
-      if (!optional) {
-        *listener << "which is not engaged";
-        return false;
-      }
-      const ValueType& value = *optional;
-      StringMatchResultListener value_listener;
-      const bool match = value_matcher_.MatchAndExplain(value, &value_listener);
-      *listener << "whose value " << PrintToString(value)
-                << (match ? " matches" : " doesn't match");
-      PrintIfNotEmpty(value_listener.str(), listener->stream());
-      return match;
-    }
-
-   private:
-    const Matcher<ValueType> value_matcher_;
-  };
-
- private:
-  const ValueMatcher value_matcher_;
-};
-
-namespace variant_matcher {
-// Overloads to allow VariantMatcher to do proper ADL lookup.
-template <typename T>
-void holds_alternative() {}
-template <typename T>
-void get() {}
-
-// Implements a matcher that checks the value of a variant<> type variable.
-template <typename T>
-class VariantMatcher {
- public:
-  explicit VariantMatcher(::testing::Matcher<const T&> matcher)
-      : matcher_(std::move(matcher)) {}
-
-  template <typename Variant>
-  bool MatchAndExplain(const Variant& value,
-                       ::testing::MatchResultListener* listener) const {
-    using std::get;
-    if (!listener->IsInterested()) {
-      return holds_alternative<T>(value) && matcher_.Matches(get<T>(value));
-    }
-
-    if (!holds_alternative<T>(value)) {
-      *listener << "whose value is not of type '" << GetTypeName() << "'";
-      return false;
-    }
-
-    const T& elem = get<T>(value);
-    StringMatchResultListener elem_listener;
-    const bool match = matcher_.MatchAndExplain(elem, &elem_listener);
-    *listener << "whose value " << PrintToString(elem)
-              << (match ? " matches" : " doesn't match");
-    PrintIfNotEmpty(elem_listener.str(), listener->stream());
-    return match;
-  }
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "is a variant<> with value of type '" << GetTypeName()
-        << "' and the value ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "is a variant<> with value of type other than '" << GetTypeName()
-        << "' or the value ";
-    matcher_.DescribeNegationTo(os);
-  }
-
- private:
-  static std::string GetTypeName() {
-#if GTEST_HAS_RTTI
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        return internal::GetTypeName<T>());
-#endif
-    return "the element type";
-  }
-
-  const ::testing::Matcher<const T&> matcher_;
-};
-
-}  // namespace variant_matcher
-
-namespace any_cast_matcher {
-
-// Overloads to allow AnyCastMatcher to do proper ADL lookup.
-template <typename T>
-void any_cast() {}
-
-// Implements a matcher that any_casts the value.
-template <typename T>
-class AnyCastMatcher {
- public:
-  explicit AnyCastMatcher(const ::testing::Matcher<const T&>& matcher)
-      : matcher_(matcher) {}
-
-  template <typename AnyType>
-  bool MatchAndExplain(const AnyType& value,
-                       ::testing::MatchResultListener* listener) const {
-    if (!listener->IsInterested()) {
-      const T* ptr = any_cast<T>(&value);
-      return ptr != nullptr && matcher_.Matches(*ptr);
-    }
-
-    const T* elem = any_cast<T>(&value);
-    if (elem == nullptr) {
-      *listener << "whose value is not of type '" << GetTypeName() << "'";
-      return false;
-    }
-
-    StringMatchResultListener elem_listener;
-    const bool match = matcher_.MatchAndExplain(*elem, &elem_listener);
-    *listener << "whose value " << PrintToString(*elem)
-              << (match ? " matches" : " doesn't match");
-    PrintIfNotEmpty(elem_listener.str(), listener->stream());
-    return match;
-  }
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "is an 'any' type with value of type '" << GetTypeName()
-        << "' and the value ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "is an 'any' type with value of type other than '" << GetTypeName()
-        << "' or the value ";
-    matcher_.DescribeNegationTo(os);
-  }
-
- private:
-  static std::string GetTypeName() {
-#if GTEST_HAS_RTTI
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        return internal::GetTypeName<T>());
-#endif
-    return "the element type";
-  }
-
-  const ::testing::Matcher<const T&> matcher_;
-};
-
-}  // namespace any_cast_matcher
-
-// Implements the Args() matcher.
-template <class ArgsTuple, size_t... k>
-class ArgsMatcherImpl : public MatcherInterface<ArgsTuple> {
- public:
-  using RawArgsTuple = typename std::decay<ArgsTuple>::type;
-  using SelectedArgs =
-      std::tuple<typename std::tuple_element<k, RawArgsTuple>::type...>;
-  using MonomorphicInnerMatcher = Matcher<const SelectedArgs&>;
-
-  template <typename InnerMatcher>
-  explicit ArgsMatcherImpl(const InnerMatcher& inner_matcher)
-      : inner_matcher_(SafeMatcherCast<const SelectedArgs&>(inner_matcher)) {}
-
-  bool MatchAndExplain(ArgsTuple args,
-                       MatchResultListener* listener) const override {
-    // Workaround spurious C4100 on MSVC<=15.7 when k is empty.
-    (void)args;
-    const SelectedArgs& selected_args =
-        std::forward_as_tuple(std::get<k>(args)...);
-    if (!listener->IsInterested()) return inner_matcher_.Matches(selected_args);
-
-    PrintIndices(listener->stream());
-    *listener << "are " << PrintToString(selected_args);
-
-    StringMatchResultListener inner_listener;
-    const bool match =
-        inner_matcher_.MatchAndExplain(selected_args, &inner_listener);
-    PrintIfNotEmpty(inner_listener.str(), listener->stream());
-    return match;
-  }
-
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "are a tuple ";
-    PrintIndices(os);
-    inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "are a tuple ";
-    PrintIndices(os);
-    inner_matcher_.DescribeNegationTo(os);
-  }
-
- private:
-  // Prints the indices of the selected fields.
-  static void PrintIndices(::std::ostream* os) {
-    *os << "whose fields (";
-    const char* sep = "";
-    // Workaround spurious C4189 on MSVC<=15.7 when k is empty.
-    (void)sep;
-    const char* dummy[] = {"", (*os << sep << "#" << k, sep = ", ")...};
-    (void)dummy;
-    *os << ") ";
-  }
-
-  MonomorphicInnerMatcher inner_matcher_;
-};
-
-template <class InnerMatcher, size_t... k>
-class ArgsMatcher {
- public:
-  explicit ArgsMatcher(InnerMatcher inner_matcher)
-      : inner_matcher_(std::move(inner_matcher)) {}
-
-  template <typename ArgsTuple>
-  operator Matcher<ArgsTuple>() const {  // NOLINT
-    return MakeMatcher(new ArgsMatcherImpl<ArgsTuple, k...>(inner_matcher_));
-  }
-
- private:
-  InnerMatcher inner_matcher_;
-};
-
-}  // namespace internal
-
-// ElementsAreArray(iterator_first, iterator_last)
-// ElementsAreArray(pointer, count)
-// ElementsAreArray(array)
-// ElementsAreArray(container)
-// ElementsAreArray({ e1, e2, ..., en })
-//
-// The ElementsAreArray() functions are like ElementsAre(...), except
-// that they are given a homogeneous sequence rather than taking each
-// element as a function argument. The sequence can be specified as an
-// array, a pointer and count, a vector, an initializer list, or an
-// STL iterator range. In each of these cases, the underlying sequence
-// can be either a sequence of values or a sequence of matchers.
-//
-// All forms of ElementsAreArray() make a copy of the input matcher sequence.
-
-template <typename Iter>
-inline internal::ElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-ElementsAreArray(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::ElementsAreArrayMatcher<T>(first, last);
-}
-
-template <typename T>
-inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
-    const T* pointer, size_t count) {
-  return ElementsAreArray(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
-    const T (&array)[N]) {
-  return ElementsAreArray(array, N);
-}
-
-template <typename Container>
-inline internal::ElementsAreArrayMatcher<typename Container::value_type>
-ElementsAreArray(const Container& container) {
-  return ElementsAreArray(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::ElementsAreArrayMatcher<T>
-ElementsAreArray(::std::initializer_list<T> xs) {
-  return ElementsAreArray(xs.begin(), xs.end());
-}
-
-// UnorderedElementsAreArray(iterator_first, iterator_last)
-// UnorderedElementsAreArray(pointer, count)
-// UnorderedElementsAreArray(array)
-// UnorderedElementsAreArray(container)
-// UnorderedElementsAreArray({ e1, e2, ..., en })
-//
-// UnorderedElementsAreArray() verifies that a bijective mapping onto a
-// collection of matchers exists.
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-UnorderedElementsAreArray(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::UnorderedElementsAreArrayMatcher<T>(
-      internal::UnorderedMatcherRequire::ExactMatch, first, last);
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T>
-UnorderedElementsAreArray(const T* pointer, size_t count) {
-  return UnorderedElementsAreArray(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::UnorderedElementsAreArrayMatcher<T>
-UnorderedElementsAreArray(const T (&array)[N]) {
-  return UnorderedElementsAreArray(array, N);
-}
-
-template <typename Container>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename Container::value_type>
-UnorderedElementsAreArray(const Container& container) {
-  return UnorderedElementsAreArray(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T>
-UnorderedElementsAreArray(::std::initializer_list<T> xs) {
-  return UnorderedElementsAreArray(xs.begin(), xs.end());
-}
-
-// _ is a matcher that matches anything of any type.
-//
-// This definition is fine as:
-//
-//   1. The C++ standard permits using the name _ in a namespace that
-//      is not the global namespace or ::std.
-//   2. The AnythingMatcher class has no data member or constructor,
-//      so it's OK to create global variables of this type.
-//   3. c-style has approved of using _ in this case.
-const internal::AnythingMatcher _ = {};
-// Creates a matcher that matches any value of the given type T.
-template <typename T>
-inline Matcher<T> A() {
-  return _;
-}
-
-// Creates a matcher that matches any value of the given type T.
-template <typename T>
-inline Matcher<T> An() {
-  return _;
-}
-
-template <typename T, typename M>
-Matcher<T> internal::MatcherCastImpl<T, M>::CastImpl(
-    const M& value, std::false_type /* convertible_to_matcher */,
-    std::false_type /* convertible_to_T */) {
-  return Eq(value);
-}
-
-// Creates a polymorphic matcher that matches any NULL pointer.
-inline PolymorphicMatcher<internal::IsNullMatcher > IsNull() {
-  return MakePolymorphicMatcher(internal::IsNullMatcher());
-}
-
-// Creates a polymorphic matcher that matches any non-NULL pointer.
-// This is convenient as Not(NULL) doesn't compile (the compiler
-// thinks that that expression is comparing a pointer with an integer).
-inline PolymorphicMatcher<internal::NotNullMatcher > NotNull() {
-  return MakePolymorphicMatcher(internal::NotNullMatcher());
-}
-
-// Creates a polymorphic matcher that matches any argument that
-// references variable x.
-template <typename T>
-inline internal::RefMatcher<T&> Ref(T& x) {  // NOLINT
-  return internal::RefMatcher<T&>(x);
-}
-
-// Creates a polymorphic matcher that matches any NaN floating point.
-inline PolymorphicMatcher<internal::IsNanMatcher> IsNan() {
-  return MakePolymorphicMatcher(internal::IsNanMatcher());
-}
-
-// Creates a matcher that matches any double argument approximately
-// equal to rhs, where two NANs are considered unequal.
-inline internal::FloatingEqMatcher<double> DoubleEq(double rhs) {
-  return internal::FloatingEqMatcher<double>(rhs, false);
-}
-
-// Creates a matcher that matches any double argument approximately
-// equal to rhs, including NaN values when rhs is NaN.
-inline internal::FloatingEqMatcher<double> NanSensitiveDoubleEq(double rhs) {
-  return internal::FloatingEqMatcher<double>(rhs, true);
-}
-
-// Creates a matcher that matches any double argument approximately equal to
-// rhs, up to the specified max absolute error bound, where two NANs are
-// considered unequal.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<double> DoubleNear(
-    double rhs, double max_abs_error) {
-  return internal::FloatingEqMatcher<double>(rhs, false, max_abs_error);
-}
-
-// Creates a matcher that matches any double argument approximately equal to
-// rhs, up to the specified max absolute error bound, including NaN values when
-// rhs is NaN.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<double> NanSensitiveDoubleNear(
-    double rhs, double max_abs_error) {
-  return internal::FloatingEqMatcher<double>(rhs, true, max_abs_error);
-}
-
-// Creates a matcher that matches any float argument approximately
-// equal to rhs, where two NANs are considered unequal.
-inline internal::FloatingEqMatcher<float> FloatEq(float rhs) {
-  return internal::FloatingEqMatcher<float>(rhs, false);
-}
-
-// Creates a matcher that matches any float argument approximately
-// equal to rhs, including NaN values when rhs is NaN.
-inline internal::FloatingEqMatcher<float> NanSensitiveFloatEq(float rhs) {
-  return internal::FloatingEqMatcher<float>(rhs, true);
-}
-
-// Creates a matcher that matches any float argument approximately equal to
-// rhs, up to the specified max absolute error bound, where two NANs are
-// considered unequal.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<float> FloatNear(
-    float rhs, float max_abs_error) {
-  return internal::FloatingEqMatcher<float>(rhs, false, max_abs_error);
-}
-
-// Creates a matcher that matches any float argument approximately equal to
-// rhs, up to the specified max absolute error bound, including NaN values when
-// rhs is NaN.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<float> NanSensitiveFloatNear(
-    float rhs, float max_abs_error) {
-  return internal::FloatingEqMatcher<float>(rhs, true, max_abs_error);
-}
-
-// Creates a matcher that matches a pointer (raw or smart) that points
-// to a value that matches inner_matcher.
-template <typename InnerMatcher>
-inline internal::PointeeMatcher<InnerMatcher> Pointee(
-    const InnerMatcher& inner_matcher) {
-  return internal::PointeeMatcher<InnerMatcher>(inner_matcher);
-}
-
-#if GTEST_HAS_RTTI
-// Creates a matcher that matches a pointer or reference that matches
-// inner_matcher when dynamic_cast<To> is applied.
-// The result of dynamic_cast<To> is forwarded to the inner matcher.
-// If To is a pointer and the cast fails, the inner matcher will receive NULL.
-// If To is a reference and the cast fails, this matcher returns false
-// immediately.
-template <typename To>
-inline PolymorphicMatcher<internal::WhenDynamicCastToMatcher<To> >
-WhenDynamicCastTo(const Matcher<To>& inner_matcher) {
-  return MakePolymorphicMatcher(
-      internal::WhenDynamicCastToMatcher<To>(inner_matcher));
-}
-#endif  // GTEST_HAS_RTTI
-
-// Creates a matcher that matches an object whose given field matches
-// 'matcher'.  For example,
-//   Field(&Foo::number, Ge(5))
-// matches a Foo object x if and only if x.number >= 5.
-template <typename Class, typename FieldType, typename FieldMatcher>
-inline PolymorphicMatcher<
-  internal::FieldMatcher<Class, FieldType> > Field(
-    FieldType Class::*field, const FieldMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::FieldMatcher<Class, FieldType>(
-          field, MatcherCast<const FieldType&>(matcher)));
-  // The call to MatcherCast() is required for supporting inner
-  // matchers of compatible types.  For example, it allows
-  //   Field(&Foo::bar, m)
-  // to compile where bar is an int32 and m is a matcher for int64.
-}
-
-// Same as Field() but also takes the name of the field to provide better error
-// messages.
-template <typename Class, typename FieldType, typename FieldMatcher>
-inline PolymorphicMatcher<internal::FieldMatcher<Class, FieldType> > Field(
-    const std::string& field_name, FieldType Class::*field,
-    const FieldMatcher& matcher) {
-  return MakePolymorphicMatcher(internal::FieldMatcher<Class, FieldType>(
-      field_name, field, MatcherCast<const FieldType&>(matcher)));
-}
-
-// Creates a matcher that matches an object whose given property
-// matches 'matcher'.  For example,
-//   Property(&Foo::str, StartsWith("hi"))
-// matches a Foo object x if and only if x.str() starts with "hi".
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const> >
-Property(PropertyType (Class::*property)() const,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const>(
-          property, MatcherCast<const PropertyType&>(matcher)));
-  // The call to MatcherCast() is required for supporting inner
-  // matchers of compatible types.  For example, it allows
-  //   Property(&Foo::bar, m)
-  // to compile where bar() returns an int32 and m is a matcher for int64.
-}
-
-// Same as Property() above, but also takes the name of the property to provide
-// better error messages.
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const> >
-Property(const std::string& property_name,
-         PropertyType (Class::*property)() const,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const>(
-          property_name, property, MatcherCast<const PropertyType&>(matcher)));
-}
-
-// The same as above but for reference-qualified member functions.
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const &> >
-Property(PropertyType (Class::*property)() const &,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const&>(
-          property, MatcherCast<const PropertyType&>(matcher)));
-}
-
-// Three-argument form for reference-qualified member functions.
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const &> >
-Property(const std::string& property_name,
-         PropertyType (Class::*property)() const &,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const&>(
-          property_name, property, MatcherCast<const PropertyType&>(matcher)));
-}
-
-// Creates a matcher that matches an object if and only if the result of
-// applying a callable to x matches 'matcher'. For example,
-//   ResultOf(f, StartsWith("hi"))
-// matches a Foo object x if and only if f(x) starts with "hi".
-// `callable` parameter can be a function, function pointer, or a functor. It is
-// required to keep no state affecting the results of the calls on it and make
-// no assumptions about how many calls will be made. Any state it keeps must be
-// protected from the concurrent access.
-template <typename Callable, typename InnerMatcher>
-internal::ResultOfMatcher<Callable, InnerMatcher> ResultOf(
-    Callable callable, InnerMatcher matcher) {
-  return internal::ResultOfMatcher<Callable, InnerMatcher>(
-      std::move(callable), std::move(matcher));
-}
-
-// String matchers.
-
-// Matches a string equal to str.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrEq(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::string>(std::string(str), true, true));
-}
-
-// Matches a string not equal to str.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrNe(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::string>(std::string(str), false, true));
-}
-
-// Matches a string equal to str, ignoring case.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseEq(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::string>(std::string(str), true, false));
-}
-
-// Matches a string not equal to str, ignoring case.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseNe(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(internal::StrEqualityMatcher<std::string>(
-      std::string(str), false, false));
-}
-
-// Creates a matcher that matches any string, std::string, or C string
-// that contains the given substring.
-template <typename T = std::string>
-PolymorphicMatcher<internal::HasSubstrMatcher<std::string> > HasSubstr(
-    const internal::StringLike<T>& substring) {
-  return MakePolymorphicMatcher(
-      internal::HasSubstrMatcher<std::string>(std::string(substring)));
-}
-
-// Matches a string that starts with 'prefix' (case-sensitive).
-template <typename T = std::string>
-PolymorphicMatcher<internal::StartsWithMatcher<std::string> > StartsWith(
-    const internal::StringLike<T>& prefix) {
-  return MakePolymorphicMatcher(
-      internal::StartsWithMatcher<std::string>(std::string(prefix)));
-}
-
-// Matches a string that ends with 'suffix' (case-sensitive).
-template <typename T = std::string>
-PolymorphicMatcher<internal::EndsWithMatcher<std::string> > EndsWith(
-    const internal::StringLike<T>& suffix) {
-  return MakePolymorphicMatcher(
-      internal::EndsWithMatcher<std::string>(std::string(suffix)));
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Wide string matchers.
-
-// Matches a string equal to str.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrEq(
-    const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, true, true));
-}
-
-// Matches a string not equal to str.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrNe(
-    const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, false, true));
-}
-
-// Matches a string equal to str, ignoring case.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
-StrCaseEq(const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, true, false));
-}
-
-// Matches a string not equal to str, ignoring case.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
-StrCaseNe(const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, false, false));
-}
-
-// Creates a matcher that matches any ::wstring, std::wstring, or C wide string
-// that contains the given substring.
-inline PolymorphicMatcher<internal::HasSubstrMatcher<std::wstring> > HasSubstr(
-    const std::wstring& substring) {
-  return MakePolymorphicMatcher(
-      internal::HasSubstrMatcher<std::wstring>(substring));
-}
-
-// Matches a string that starts with 'prefix' (case-sensitive).
-inline PolymorphicMatcher<internal::StartsWithMatcher<std::wstring> >
-StartsWith(const std::wstring& prefix) {
-  return MakePolymorphicMatcher(
-      internal::StartsWithMatcher<std::wstring>(prefix));
-}
-
-// Matches a string that ends with 'suffix' (case-sensitive).
-inline PolymorphicMatcher<internal::EndsWithMatcher<std::wstring> > EndsWith(
-    const std::wstring& suffix) {
-  return MakePolymorphicMatcher(
-      internal::EndsWithMatcher<std::wstring>(suffix));
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field == the second field.
-inline internal::Eq2Matcher Eq() { return internal::Eq2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field >= the second field.
-inline internal::Ge2Matcher Ge() { return internal::Ge2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field > the second field.
-inline internal::Gt2Matcher Gt() { return internal::Gt2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field <= the second field.
-inline internal::Le2Matcher Le() { return internal::Le2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field < the second field.
-inline internal::Lt2Matcher Lt() { return internal::Lt2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field != the second field.
-inline internal::Ne2Matcher Ne() { return internal::Ne2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatEq(first field) matches the second field.
-inline internal::FloatingEq2Matcher<float> FloatEq() {
-  return internal::FloatingEq2Matcher<float>();
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleEq(first field) matches the second field.
-inline internal::FloatingEq2Matcher<double> DoubleEq() {
-  return internal::FloatingEq2Matcher<double>();
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatEq(first field) matches the second field with NaN equality.
-inline internal::FloatingEq2Matcher<float> NanSensitiveFloatEq() {
-  return internal::FloatingEq2Matcher<float>(true);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleEq(first field) matches the second field with NaN equality.
-inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleEq() {
-  return internal::FloatingEq2Matcher<double>(true);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatNear(first field, max_abs_error) matches the second field.
-inline internal::FloatingEq2Matcher<float> FloatNear(float max_abs_error) {
-  return internal::FloatingEq2Matcher<float>(max_abs_error);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleNear(first field, max_abs_error) matches the second field.
-inline internal::FloatingEq2Matcher<double> DoubleNear(double max_abs_error) {
-  return internal::FloatingEq2Matcher<double>(max_abs_error);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatNear(first field, max_abs_error) matches the second field with NaN
-// equality.
-inline internal::FloatingEq2Matcher<float> NanSensitiveFloatNear(
-    float max_abs_error) {
-  return internal::FloatingEq2Matcher<float>(max_abs_error, true);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleNear(first field, max_abs_error) matches the second field with NaN
-// equality.
-inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleNear(
-    double max_abs_error) {
-  return internal::FloatingEq2Matcher<double>(max_abs_error, true);
-}
-
-// Creates a matcher that matches any value of type T that m doesn't
-// match.
-template <typename InnerMatcher>
-inline internal::NotMatcher<InnerMatcher> Not(InnerMatcher m) {
-  return internal::NotMatcher<InnerMatcher>(m);
-}
-
-// Returns a matcher that matches anything that satisfies the given
-// predicate.  The predicate can be any unary function or functor
-// whose return type can be implicitly converted to bool.
-template <typename Predicate>
-inline PolymorphicMatcher<internal::TrulyMatcher<Predicate> >
-Truly(Predicate pred) {
-  return MakePolymorphicMatcher(internal::TrulyMatcher<Predicate>(pred));
-}
-
-// Returns a matcher that matches the container size. The container must
-// support both size() and size_type which all STL-like containers provide.
-// Note that the parameter 'size' can be a value of type size_type as well as
-// matcher. For instance:
-//   EXPECT_THAT(container, SizeIs(2));     // Checks container has 2 elements.
-//   EXPECT_THAT(container, SizeIs(Le(2));  // Checks container has at most 2.
-template <typename SizeMatcher>
-inline internal::SizeIsMatcher<SizeMatcher>
-SizeIs(const SizeMatcher& size_matcher) {
-  return internal::SizeIsMatcher<SizeMatcher>(size_matcher);
-}
-
-// Returns a matcher that matches the distance between the container's begin()
-// iterator and its end() iterator, i.e. the size of the container. This matcher
-// can be used instead of SizeIs with containers such as std::forward_list which
-// do not implement size(). The container must provide const_iterator (with
-// valid iterator_traits), begin() and end().
-template <typename DistanceMatcher>
-inline internal::BeginEndDistanceIsMatcher<DistanceMatcher>
-BeginEndDistanceIs(const DistanceMatcher& distance_matcher) {
-  return internal::BeginEndDistanceIsMatcher<DistanceMatcher>(distance_matcher);
-}
-
-// Returns a matcher that matches an equal container.
-// This matcher behaves like Eq(), but in the event of mismatch lists the
-// values that are included in one container but not the other. (Duplicate
-// values and order differences are not explained.)
-template <typename Container>
-inline PolymorphicMatcher<internal::ContainerEqMatcher<
-    typename std::remove_const<Container>::type>>
-ContainerEq(const Container& rhs) {
-  return MakePolymorphicMatcher(internal::ContainerEqMatcher<Container>(rhs));
-}
-
-// Returns a matcher that matches a container that, when sorted using
-// the given comparator, matches container_matcher.
-template <typename Comparator, typename ContainerMatcher>
-inline internal::WhenSortedByMatcher<Comparator, ContainerMatcher>
-WhenSortedBy(const Comparator& comparator,
-             const ContainerMatcher& container_matcher) {
-  return internal::WhenSortedByMatcher<Comparator, ContainerMatcher>(
-      comparator, container_matcher);
-}
-
-// Returns a matcher that matches a container that, when sorted using
-// the < operator, matches container_matcher.
-template <typename ContainerMatcher>
-inline internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>
-WhenSorted(const ContainerMatcher& container_matcher) {
-  return
-      internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>(
-          internal::LessComparator(), container_matcher);
-}
-
-// Matches an STL-style container or a native array that contains the
-// same number of elements as in rhs, where its i-th element and rhs's
-// i-th element (as a pair) satisfy the given pair matcher, for all i.
-// TupleMatcher must be able to be safely cast to Matcher<std::tuple<const
-// T1&, const T2&> >, where T1 and T2 are the types of elements in the
-// LHS container and the RHS container respectively.
-template <typename TupleMatcher, typename Container>
-inline internal::PointwiseMatcher<TupleMatcher,
-                                  typename std::remove_const<Container>::type>
-Pointwise(const TupleMatcher& tuple_matcher, const Container& rhs) {
-  return internal::PointwiseMatcher<TupleMatcher, Container>(tuple_matcher,
-                                                             rhs);
-}
-
-
-// Supports the Pointwise(m, {a, b, c}) syntax.
-template <typename TupleMatcher, typename T>
-inline internal::PointwiseMatcher<TupleMatcher, std::vector<T> > Pointwise(
-    const TupleMatcher& tuple_matcher, std::initializer_list<T> rhs) {
-  return Pointwise(tuple_matcher, std::vector<T>(rhs));
-}
-
-
-// UnorderedPointwise(pair_matcher, rhs) matches an STL-style
-// container or a native array that contains the same number of
-// elements as in rhs, where in some permutation of the container, its
-// i-th element and rhs's i-th element (as a pair) satisfy the given
-// pair matcher, for all i.  Tuple2Matcher must be able to be safely
-// cast to Matcher<std::tuple<const T1&, const T2&> >, where T1 and T2 are
-// the types of elements in the LHS container and the RHS container
-// respectively.
-//
-// This is like Pointwise(pair_matcher, rhs), except that the element
-// order doesn't matter.
-template <typename Tuple2Matcher, typename RhsContainer>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename internal::BoundSecondMatcher<
-        Tuple2Matcher,
-        typename internal::StlContainerView<
-            typename std::remove_const<RhsContainer>::type>::type::value_type>>
-UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
-                   const RhsContainer& rhs_container) {
-  // RhsView allows the same code to handle RhsContainer being a
-  // STL-style container and it being a native C-style array.
-  typedef typename internal::StlContainerView<RhsContainer> RhsView;
-  typedef typename RhsView::type RhsStlContainer;
-  typedef typename RhsStlContainer::value_type Second;
-  const RhsStlContainer& rhs_stl_container =
-      RhsView::ConstReference(rhs_container);
-
-  // Create a matcher for each element in rhs_container.
-  ::std::vector<internal::BoundSecondMatcher<Tuple2Matcher, Second> > matchers;
-  for (typename RhsStlContainer::const_iterator it = rhs_stl_container.begin();
-       it != rhs_stl_container.end(); ++it) {
-    matchers.push_back(
-        internal::MatcherBindSecond(tuple2_matcher, *it));
-  }
-
-  // Delegate the work to UnorderedElementsAreArray().
-  return UnorderedElementsAreArray(matchers);
-}
-
-
-// Supports the UnorderedPointwise(m, {a, b, c}) syntax.
-template <typename Tuple2Matcher, typename T>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename internal::BoundSecondMatcher<Tuple2Matcher, T> >
-UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
-                   std::initializer_list<T> rhs) {
-  return UnorderedPointwise(tuple2_matcher, std::vector<T>(rhs));
-}
-
-
-// Matches an STL-style container or a native array that contains at
-// least one element matching the given value or matcher.
-//
-// Examples:
-//   ::std::set<int> page_ids;
-//   page_ids.insert(3);
-//   page_ids.insert(1);
-//   EXPECT_THAT(page_ids, Contains(1));
-//   EXPECT_THAT(page_ids, Contains(Gt(2)));
-//   EXPECT_THAT(page_ids, Not(Contains(4)));
-//
-//   ::std::map<int, size_t> page_lengths;
-//   page_lengths[1] = 100;
-//   EXPECT_THAT(page_lengths,
-//               Contains(::std::pair<const int, size_t>(1, 100)));
-//
-//   const char* user_ids[] = { "joe", "mike", "tom" };
-//   EXPECT_THAT(user_ids, Contains(Eq(::std::string("tom"))));
-template <typename M>
-inline internal::ContainsMatcher<M> Contains(M matcher) {
-  return internal::ContainsMatcher<M>(matcher);
-}
-
-// IsSupersetOf(iterator_first, iterator_last)
-// IsSupersetOf(pointer, count)
-// IsSupersetOf(array)
-// IsSupersetOf(container)
-// IsSupersetOf({e1, e2, ..., en})
-//
-// IsSupersetOf() verifies that a surjective partial mapping onto a collection
-// of matchers exists. In other words, a container matches
-// IsSupersetOf({e1, ..., en}) if and only if there is a permutation
-// {y1, ..., yn} of some of the container's elements where y1 matches e1,
-// ..., and yn matches en. Obviously, the size of the container must be >= n
-// in order to have a match. Examples:
-//
-// - {1, 2, 3} matches IsSupersetOf({Ge(3), Ne(0)}), as 3 matches Ge(3) and
-//   1 matches Ne(0).
-// - {1, 2} doesn't match IsSupersetOf({Eq(1), Lt(2)}), even though 1 matches
-//   both Eq(1) and Lt(2). The reason is that different matchers must be used
-//   for elements in different slots of the container.
-// - {1, 1, 2} matches IsSupersetOf({Eq(1), Lt(2)}), as (the first) 1 matches
-//   Eq(1) and (the second) 1 matches Lt(2).
-// - {1, 2, 3} matches IsSupersetOf(Gt(1), Gt(1)), as 2 matches (the first)
-//   Gt(1) and 3 matches (the second) Gt(1).
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-IsSupersetOf(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::UnorderedElementsAreArrayMatcher<T>(
-      internal::UnorderedMatcherRequire::Superset, first, last);
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
-    const T* pointer, size_t count) {
-  return IsSupersetOf(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
-    const T (&array)[N]) {
-  return IsSupersetOf(array, N);
-}
-
-template <typename Container>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename Container::value_type>
-IsSupersetOf(const Container& container) {
-  return IsSupersetOf(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
-    ::std::initializer_list<T> xs) {
-  return IsSupersetOf(xs.begin(), xs.end());
-}
-
-// IsSubsetOf(iterator_first, iterator_last)
-// IsSubsetOf(pointer, count)
-// IsSubsetOf(array)
-// IsSubsetOf(container)
-// IsSubsetOf({e1, e2, ..., en})
-//
-// IsSubsetOf() verifies that an injective mapping onto a collection of matchers
-// exists.  In other words, a container matches IsSubsetOf({e1, ..., en}) if and
-// only if there is a subset of matchers {m1, ..., mk} which would match the
-// container using UnorderedElementsAre.  Obviously, the size of the container
-// must be <= n in order to have a match. Examples:
-//
-// - {1} matches IsSubsetOf({Gt(0), Lt(0)}), as 1 matches Gt(0).
-// - {1, -1} matches IsSubsetOf({Lt(0), Gt(0)}), as 1 matches Gt(0) and -1
-//   matches Lt(0).
-// - {1, 2} doesn't matches IsSubsetOf({Gt(0), Lt(0)}), even though 1 and 2 both
-//   match Gt(0). The reason is that different matchers must be used for
-//   elements in different slots of the container.
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-IsSubsetOf(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::UnorderedElementsAreArrayMatcher<T>(
-      internal::UnorderedMatcherRequire::Subset, first, last);
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
-    const T* pointer, size_t count) {
-  return IsSubsetOf(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
-    const T (&array)[N]) {
-  return IsSubsetOf(array, N);
-}
-
-template <typename Container>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename Container::value_type>
-IsSubsetOf(const Container& container) {
-  return IsSubsetOf(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
-    ::std::initializer_list<T> xs) {
-  return IsSubsetOf(xs.begin(), xs.end());
-}
-
-// Matches an STL-style container or a native array that contains only
-// elements matching the given value or matcher.
-//
-// Each(m) is semantically equivalent to Not(Contains(Not(m))). Only
-// the messages are different.
-//
-// Examples:
-//   ::std::set<int> page_ids;
-//   // Each(m) matches an empty container, regardless of what m is.
-//   EXPECT_THAT(page_ids, Each(Eq(1)));
-//   EXPECT_THAT(page_ids, Each(Eq(77)));
-//
-//   page_ids.insert(3);
-//   EXPECT_THAT(page_ids, Each(Gt(0)));
-//   EXPECT_THAT(page_ids, Not(Each(Gt(4))));
-//   page_ids.insert(1);
-//   EXPECT_THAT(page_ids, Not(Each(Lt(2))));
-//
-//   ::std::map<int, size_t> page_lengths;
-//   page_lengths[1] = 100;
-//   page_lengths[2] = 200;
-//   page_lengths[3] = 300;
-//   EXPECT_THAT(page_lengths, Not(Each(Pair(1, 100))));
-//   EXPECT_THAT(page_lengths, Each(Key(Le(3))));
-//
-//   const char* user_ids[] = { "joe", "mike", "tom" };
-//   EXPECT_THAT(user_ids, Not(Each(Eq(::std::string("tom")))));
-template <typename M>
-inline internal::EachMatcher<M> Each(M matcher) {
-  return internal::EachMatcher<M>(matcher);
-}
-
-// Key(inner_matcher) matches an std::pair whose 'first' field matches
-// inner_matcher.  For example, Contains(Key(Ge(5))) can be used to match an
-// std::map that contains at least one element whose key is >= 5.
-template <typename M>
-inline internal::KeyMatcher<M> Key(M inner_matcher) {
-  return internal::KeyMatcher<M>(inner_matcher);
-}
-
-// Pair(first_matcher, second_matcher) matches a std::pair whose 'first' field
-// matches first_matcher and whose 'second' field matches second_matcher.  For
-// example, EXPECT_THAT(map_type, ElementsAre(Pair(Ge(5), "foo"))) can be used
-// to match a std::map<int, string> that contains exactly one element whose key
-// is >= 5 and whose value equals "foo".
-template <typename FirstMatcher, typename SecondMatcher>
-inline internal::PairMatcher<FirstMatcher, SecondMatcher>
-Pair(FirstMatcher first_matcher, SecondMatcher second_matcher) {
-  return internal::PairMatcher<FirstMatcher, SecondMatcher>(
-      first_matcher, second_matcher);
-}
-
-namespace no_adl {
-// FieldsAre(matchers...) matches piecewise the fields of compatible structs.
-// These include those that support `get<I>(obj)`, and when structured bindings
-// are enabled any class that supports them.
-// In particular, `std::tuple`, `std::pair`, `std::array` and aggregate types.
-template <typename... M>
-internal::FieldsAreMatcher<typename std::decay<M>::type...> FieldsAre(
-    M&&... matchers) {
-  return internal::FieldsAreMatcher<typename std::decay<M>::type...>(
-      std::forward<M>(matchers)...);
-}
-
-// Creates a matcher that matches a pointer (raw or smart) that matches
-// inner_matcher.
-template <typename InnerMatcher>
-inline internal::PointerMatcher<InnerMatcher> Pointer(
-    const InnerMatcher& inner_matcher) {
-  return internal::PointerMatcher<InnerMatcher>(inner_matcher);
-}
-
-// Creates a matcher that matches an object that has an address that matches
-// inner_matcher.
-template <typename InnerMatcher>
-inline internal::AddressMatcher<InnerMatcher> Address(
-    const InnerMatcher& inner_matcher) {
-  return internal::AddressMatcher<InnerMatcher>(inner_matcher);
-}
-}  // namespace no_adl
-
-// Returns a predicate that is satisfied by anything that matches the
-// given matcher.
-template <typename M>
-inline internal::MatcherAsPredicate<M> Matches(M matcher) {
-  return internal::MatcherAsPredicate<M>(matcher);
-}
-
-// Returns true if and only if the value matches the matcher.
-template <typename T, typename M>
-inline bool Value(const T& value, M matcher) {
-  return testing::Matches(matcher)(value);
-}
-
-// Matches the value against the given matcher and explains the match
-// result to listener.
-template <typename T, typename M>
-inline bool ExplainMatchResult(
-    M matcher, const T& value, MatchResultListener* listener) {
-  return SafeMatcherCast<const T&>(matcher).MatchAndExplain(value, listener);
-}
-
-// Returns a string representation of the given matcher.  Useful for description
-// strings of matchers defined using MATCHER_P* macros that accept matchers as
-// their arguments.  For example:
-//
-// MATCHER_P(XAndYThat, matcher,
-//           "X that " + DescribeMatcher<int>(matcher, negation) +
-//               " and Y that " + DescribeMatcher<double>(matcher, negation)) {
-//   return ExplainMatchResult(matcher, arg.x(), result_listener) &&
-//          ExplainMatchResult(matcher, arg.y(), result_listener);
-// }
-template <typename T, typename M>
-std::string DescribeMatcher(const M& matcher, bool negation = false) {
-  ::std::stringstream ss;
-  Matcher<T> monomorphic_matcher = SafeMatcherCast<T>(matcher);
-  if (negation) {
-    monomorphic_matcher.DescribeNegationTo(&ss);
-  } else {
-    monomorphic_matcher.DescribeTo(&ss);
-  }
-  return ss.str();
-}
-
-template <typename... Args>
-internal::ElementsAreMatcher<
-    std::tuple<typename std::decay<const Args&>::type...>>
-ElementsAre(const Args&... matchers) {
-  return internal::ElementsAreMatcher<
-      std::tuple<typename std::decay<const Args&>::type...>>(
-      std::make_tuple(matchers...));
-}
-
-template <typename... Args>
-internal::UnorderedElementsAreMatcher<
-    std::tuple<typename std::decay<const Args&>::type...>>
-UnorderedElementsAre(const Args&... matchers) {
-  return internal::UnorderedElementsAreMatcher<
-      std::tuple<typename std::decay<const Args&>::type...>>(
-      std::make_tuple(matchers...));
-}
-
-// Define variadic matcher versions.
-template <typename... Args>
-internal::AllOfMatcher<typename std::decay<const Args&>::type...> AllOf(
-    const Args&... matchers) {
-  return internal::AllOfMatcher<typename std::decay<const Args&>::type...>(
-      matchers...);
-}
-
-template <typename... Args>
-internal::AnyOfMatcher<typename std::decay<const Args&>::type...> AnyOf(
-    const Args&... matchers) {
-  return internal::AnyOfMatcher<typename std::decay<const Args&>::type...>(
-      matchers...);
-}
-
-// AnyOfArray(array)
-// AnyOfArray(pointer, count)
-// AnyOfArray(container)
-// AnyOfArray({ e1, e2, ..., en })
-// AnyOfArray(iterator_first, iterator_last)
-//
-// AnyOfArray() verifies whether a given value matches any member of a
-// collection of matchers.
-//
-// AllOfArray(array)
-// AllOfArray(pointer, count)
-// AllOfArray(container)
-// AllOfArray({ e1, e2, ..., en })
-// AllOfArray(iterator_first, iterator_last)
-//
-// AllOfArray() verifies whether a given value matches all members of a
-// collection of matchers.
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::AnyOfArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-AnyOfArray(Iter first, Iter last) {
-  return internal::AnyOfArrayMatcher<
-      typename ::std::iterator_traits<Iter>::value_type>(first, last);
-}
-
-template <typename Iter>
-inline internal::AllOfArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-AllOfArray(Iter first, Iter last) {
-  return internal::AllOfArrayMatcher<
-      typename ::std::iterator_traits<Iter>::value_type>(first, last);
-}
-
-template <typename T>
-inline internal::AnyOfArrayMatcher<T> AnyOfArray(const T* ptr, size_t count) {
-  return AnyOfArray(ptr, ptr + count);
-}
-
-template <typename T>
-inline internal::AllOfArrayMatcher<T> AllOfArray(const T* ptr, size_t count) {
-  return AllOfArray(ptr, ptr + count);
-}
-
-template <typename T, size_t N>
-inline internal::AnyOfArrayMatcher<T> AnyOfArray(const T (&array)[N]) {
-  return AnyOfArray(array, N);
-}
-
-template <typename T, size_t N>
-inline internal::AllOfArrayMatcher<T> AllOfArray(const T (&array)[N]) {
-  return AllOfArray(array, N);
-}
-
-template <typename Container>
-inline internal::AnyOfArrayMatcher<typename Container::value_type> AnyOfArray(
-    const Container& container) {
-  return AnyOfArray(container.begin(), container.end());
-}
-
-template <typename Container>
-inline internal::AllOfArrayMatcher<typename Container::value_type> AllOfArray(
-    const Container& container) {
-  return AllOfArray(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::AnyOfArrayMatcher<T> AnyOfArray(
-    ::std::initializer_list<T> xs) {
-  return AnyOfArray(xs.begin(), xs.end());
-}
-
-template <typename T>
-inline internal::AllOfArrayMatcher<T> AllOfArray(
-    ::std::initializer_list<T> xs) {
-  return AllOfArray(xs.begin(), xs.end());
-}
-
-// Args<N1, N2, ..., Nk>(a_matcher) matches a tuple if the selected
-// fields of it matches a_matcher.  C++ doesn't support default
-// arguments for function templates, so we have to overload it.
-template <size_t... k, typename InnerMatcher>
-internal::ArgsMatcher<typename std::decay<InnerMatcher>::type, k...> Args(
-    InnerMatcher&& matcher) {
-  return internal::ArgsMatcher<typename std::decay<InnerMatcher>::type, k...>(
-      std::forward<InnerMatcher>(matcher));
-}
-
-// AllArgs(m) is a synonym of m.  This is useful in
-//
-//   EXPECT_CALL(foo, Bar(_, _)).With(AllArgs(Eq()));
-//
-// which is easier to read than
-//
-//   EXPECT_CALL(foo, Bar(_, _)).With(Eq());
-template <typename InnerMatcher>
-inline InnerMatcher AllArgs(const InnerMatcher& matcher) { return matcher; }
-
-// Returns a matcher that matches the value of an optional<> type variable.
-// The matcher implementation only uses '!arg' and requires that the optional<>
-// type has a 'value_type' member type and that '*arg' is of type 'value_type'
-// and is printable using 'PrintToString'. It is compatible with
-// std::optional/std::experimental::optional.
-// Note that to compare an optional type variable against nullopt you should
-// use Eq(nullopt) and not Eq(Optional(nullopt)). The latter implies that the
-// optional value contains an optional itself.
-template <typename ValueMatcher>
-inline internal::OptionalMatcher<ValueMatcher> Optional(
-    const ValueMatcher& value_matcher) {
-  return internal::OptionalMatcher<ValueMatcher>(value_matcher);
-}
-
-// Returns a matcher that matches the value of a absl::any type variable.
-template <typename T>
-PolymorphicMatcher<internal::any_cast_matcher::AnyCastMatcher<T> > AnyWith(
-    const Matcher<const T&>& matcher) {
-  return MakePolymorphicMatcher(
-      internal::any_cast_matcher::AnyCastMatcher<T>(matcher));
-}
-
-// Returns a matcher that matches the value of a variant<> type variable.
-// The matcher implementation uses ADL to find the holds_alternative and get
-// functions.
-// It is compatible with std::variant.
-template <typename T>
-PolymorphicMatcher<internal::variant_matcher::VariantMatcher<T> > VariantWith(
-    const Matcher<const T&>& matcher) {
-  return MakePolymorphicMatcher(
-      internal::variant_matcher::VariantMatcher<T>(matcher));
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Anything inside the `internal` namespace is internal to the implementation
-// and must not be used in user code!
-namespace internal {
-
-class WithWhatMatcherImpl {
- public:
-  WithWhatMatcherImpl(Matcher<std::string> matcher)
-      : matcher_(std::move(matcher)) {}
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "contains .what() that ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "contains .what() that does not ";
-    matcher_.DescribeTo(os);
-  }
-
-  template <typename Err>
-  bool MatchAndExplain(const Err& err, MatchResultListener* listener) const {
-    *listener << "which contains .what() that ";
-    return matcher_.MatchAndExplain(err.what(), listener);
-  }
-
- private:
-  const Matcher<std::string> matcher_;
-};
-
-inline PolymorphicMatcher<WithWhatMatcherImpl> WithWhat(
-    Matcher<std::string> m) {
-  return MakePolymorphicMatcher(WithWhatMatcherImpl(std::move(m)));
-}
-
-template <typename Err>
-class ExceptionMatcherImpl {
-  class NeverThrown {
-   public:
-    const char* what() const noexcept {
-      return "this exception should never be thrown";
-    }
-  };
-
-  // If the matchee raises an exception of a wrong type, we'd like to
-  // catch it and print its message and type. To do that, we add an additional
-  // catch clause:
-  //
-  //     try { ... }
-  //     catch (const Err&) { /* an expected exception */ }
-  //     catch (const std::exception&) { /* exception of a wrong type */ }
-  //
-  // However, if the `Err` itself is `std::exception`, we'd end up with two
-  // identical `catch` clauses:
-  //
-  //     try { ... }
-  //     catch (const std::exception&) { /* an expected exception */ }
-  //     catch (const std::exception&) { /* exception of a wrong type */ }
-  //
-  // This can cause a warning or an error in some compilers. To resolve
-  // the issue, we use a fake error type whenever `Err` is `std::exception`:
-  //
-  //     try { ... }
-  //     catch (const std::exception&) { /* an expected exception */ }
-  //     catch (const NeverThrown&) { /* exception of a wrong type */ }
-  using DefaultExceptionType = typename std::conditional<
-      std::is_same<typename std::remove_cv<
-                       typename std::remove_reference<Err>::type>::type,
-                   std::exception>::value,
-      const NeverThrown&, const std::exception&>::type;
-
- public:
-  ExceptionMatcherImpl(Matcher<const Err&> matcher)
-      : matcher_(std::move(matcher)) {}
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "throws an exception which is a " << GetTypeName<Err>();
-    *os << " which ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "throws an exception which is not a " << GetTypeName<Err>();
-    *os << " which ";
-    matcher_.DescribeNegationTo(os);
-  }
-
-  template <typename T>
-  bool MatchAndExplain(T&& x, MatchResultListener* listener) const {
-    try {
-      (void)(std::forward<T>(x)());
-    } catch (const Err& err) {
-      *listener << "throws an exception which is a " << GetTypeName<Err>();
-      *listener << " ";
-      return matcher_.MatchAndExplain(err, listener);
-    } catch (DefaultExceptionType err) {
-#if GTEST_HAS_RTTI
-      *listener << "throws an exception of type " << GetTypeName(typeid(err));
-      *listener << " ";
-#else
-      *listener << "throws an std::exception-derived type ";
-#endif
-      *listener << "with description \"" << err.what() << "\"";
-      return false;
-    } catch (...) {
-      *listener << "throws an exception of an unknown type";
-      return false;
-    }
-
-    *listener << "does not throw any exception";
-    return false;
-  }
-
- private:
-  const Matcher<const Err&> matcher_;
-};
-
-}  // namespace internal
-
-// Throws()
-// Throws(exceptionMatcher)
-// ThrowsMessage(messageMatcher)
-//
-// This matcher accepts a callable and verifies that when invoked, it throws
-// an exception with the given type and properties.
-//
-// Examples:
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
-//       Throws<std::runtime_error>());
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
-//       ThrowsMessage<std::runtime_error>(HasSubstr("message")));
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
-//       Throws<std::runtime_error>(
-//           Property(&std::runtime_error::what, HasSubstr("message"))));
-
-template <typename Err>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> Throws() {
-  return MakePolymorphicMatcher(
-      internal::ExceptionMatcherImpl<Err>(A<const Err&>()));
-}
-
-template <typename Err, typename ExceptionMatcher>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> Throws(
-    const ExceptionMatcher& exception_matcher) {
-  // Using matcher cast allows users to pass a matcher of a more broad type.
-  // For example user may want to pass Matcher<std::exception>
-  // to Throws<std::runtime_error>, or Matcher<int64> to Throws<int32>.
-  return MakePolymorphicMatcher(internal::ExceptionMatcherImpl<Err>(
-      SafeMatcherCast<const Err&>(exception_matcher)));
-}
-
-template <typename Err, typename MessageMatcher>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> ThrowsMessage(
-    MessageMatcher&& message_matcher) {
-  static_assert(std::is_base_of<std::exception, Err>::value,
-                "expected an std::exception-derived type");
-  return Throws<Err>(internal::WithWhat(
-      MatcherCast<std::string>(std::forward<MessageMatcher>(message_matcher))));
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// These macros allow using matchers to check values in Google Test
-// tests.  ASSERT_THAT(value, matcher) and EXPECT_THAT(value, matcher)
-// succeed if and only if the value matches the matcher.  If the assertion
-// fails, the value and the description of the matcher will be printed.
-#define ASSERT_THAT(value, matcher) ASSERT_PRED_FORMAT1(\
-    ::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
-#define EXPECT_THAT(value, matcher) EXPECT_PRED_FORMAT1(\
-    ::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
-
-// MATCHER* macroses itself are listed below.
-#define MATCHER(name, description)                                             \
-  class name##Matcher                                                          \
-      : public ::testing::internal::MatcherBaseImpl<name##Matcher> {           \
-   public:                                                                     \
-    template <typename arg_type>                                               \
-    class gmock_Impl : public ::testing::MatcherInterface<const arg_type&> {   \
-     public:                                                                   \
-      gmock_Impl() {}                                                          \
-      bool MatchAndExplain(                                                    \
-          const arg_type& arg,                                                 \
-          ::testing::MatchResultListener* result_listener) const override;     \
-      void DescribeTo(::std::ostream* gmock_os) const override {               \
-        *gmock_os << FormatDescription(false);                                 \
-      }                                                                        \
-      void DescribeNegationTo(::std::ostream* gmock_os) const override {       \
-        *gmock_os << FormatDescription(true);                                  \
-      }                                                                        \
-                                                                               \
-     private:                                                                  \
-      ::std::string FormatDescription(bool negation) const {                   \
-        ::std::string gmock_description = (description);                       \
-        if (!gmock_description.empty()) {                                      \
-          return gmock_description;                                            \
-        }                                                                      \
-        return ::testing::internal::FormatMatcherDescription(negation, #name,  \
-                                                             {});              \
-      }                                                                        \
-    };                                                                         \
-  };                                                                           \
-  GTEST_ATTRIBUTE_UNUSED_ inline name##Matcher name() { return {}; }           \
-  template <typename arg_type>                                                 \
-  bool name##Matcher::gmock_Impl<arg_type>::MatchAndExplain(                   \
-      const arg_type& arg,                                                     \
-      ::testing::MatchResultListener* result_listener GTEST_ATTRIBUTE_UNUSED_) \
-      const
-
-#define MATCHER_P(name, p0, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP, description, (p0))
-#define MATCHER_P2(name, p0, p1, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP2, description, (p0, p1))
-#define MATCHER_P3(name, p0, p1, p2, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP3, description, (p0, p1, p2))
-#define MATCHER_P4(name, p0, p1, p2, p3, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP4, description, (p0, p1, p2, p3))
-#define MATCHER_P5(name, p0, p1, p2, p3, p4, description)    \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP5, description, \
-                         (p0, p1, p2, p3, p4))
-#define MATCHER_P6(name, p0, p1, p2, p3, p4, p5, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP6, description,  \
-                         (p0, p1, p2, p3, p4, p5))
-#define MATCHER_P7(name, p0, p1, p2, p3, p4, p5, p6, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP7, description,      \
-                         (p0, p1, p2, p3, p4, p5, p6))
-#define MATCHER_P8(name, p0, p1, p2, p3, p4, p5, p6, p7, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP8, description,          \
-                         (p0, p1, p2, p3, p4, p5, p6, p7))
-#define MATCHER_P9(name, p0, p1, p2, p3, p4, p5, p6, p7, p8, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP9, description,              \
-                         (p0, p1, p2, p3, p4, p5, p6, p7, p8))
-#define MATCHER_P10(name, p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP10, description,                  \
-                         (p0, p1, p2, p3, p4, p5, p6, p7, p8, p9))
-
-#define GMOCK_INTERNAL_MATCHER(name, full_name, description, args)             \
-  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
-  class full_name : public ::testing::internal::MatcherBaseImpl<               \
-                        full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>> { \
-   public:                                                                     \
-    using full_name::MatcherBaseImpl::MatcherBaseImpl;                         \
-    template <typename arg_type>                                               \
-    class gmock_Impl : public ::testing::MatcherInterface<const arg_type&> {   \
-     public:                                                                   \
-      explicit gmock_Impl(GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args))          \
-          : GMOCK_INTERNAL_MATCHER_FORWARD_ARGS(args) {}                       \
-      bool MatchAndExplain(                                                    \
-          const arg_type& arg,                                                 \
-          ::testing::MatchResultListener* result_listener) const override;     \
-      void DescribeTo(::std::ostream* gmock_os) const override {               \
-        *gmock_os << FormatDescription(false);                                 \
-      }                                                                        \
-      void DescribeNegationTo(::std::ostream* gmock_os) const override {       \
-        *gmock_os << FormatDescription(true);                                  \
-      }                                                                        \
-      GMOCK_INTERNAL_MATCHER_MEMBERS(args)                                     \
-                                                                               \
-     private:                                                                  \
-      ::std::string FormatDescription(bool negation) const {                   \
-        ::std::string gmock_description = (description);                       \
-        if (!gmock_description.empty()) {                                      \
-          return gmock_description;                                            \
-        }                                                                      \
-        return ::testing::internal::FormatMatcherDescription(                  \
-            negation, #name,                                                   \
-            ::testing::internal::UniversalTersePrintTupleFieldsToStrings(      \
-                ::std::tuple<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>(        \
-                    GMOCK_INTERNAL_MATCHER_MEMBERS_USAGE(args))));             \
-      }                                                                        \
-    };                                                                         \
-  };                                                                           \
-  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
-  inline full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)> name(             \
-      GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args)) {                            \
-    return full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>(                \
-        GMOCK_INTERNAL_MATCHER_ARGS_USAGE(args));                              \
-  }                                                                            \
-  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
-  template <typename arg_type>                                                 \
-  bool full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>::gmock_Impl<        \
-      arg_type>::MatchAndExplain(const arg_type& arg,                          \
-                                 ::testing::MatchResultListener*               \
-                                     result_listener GTEST_ATTRIBUTE_UNUSED_)  \
-      const
-
-#define GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args) \
-  GMOCK_PP_TAIL(                                     \
-      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAM, , args))
-#define GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAM(i_unused, data_unused, arg) \
-  , typename arg##_type
-
-#define GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_TYPE_PARAM, , args))
-#define GMOCK_INTERNAL_MATCHER_TYPE_PARAM(i_unused, data_unused, arg) \
-  , arg##_type
-
-#define GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args) \
-  GMOCK_PP_TAIL(dummy_first GMOCK_PP_FOR_EACH(     \
-      GMOCK_INTERNAL_MATCHER_FUNCTION_ARG, , args))
-#define GMOCK_INTERNAL_MATCHER_FUNCTION_ARG(i, data_unused, arg) \
-  , arg##_type gmock_p##i
-
-#define GMOCK_INTERNAL_MATCHER_FORWARD_ARGS(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_FORWARD_ARG, , args))
-#define GMOCK_INTERNAL_MATCHER_FORWARD_ARG(i, data_unused, arg) \
-  , arg(::std::forward<arg##_type>(gmock_p##i))
-
-#define GMOCK_INTERNAL_MATCHER_MEMBERS(args) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_MEMBER, , args)
-#define GMOCK_INTERNAL_MATCHER_MEMBER(i_unused, data_unused, arg) \
-  const arg##_type arg;
-
-#define GMOCK_INTERNAL_MATCHER_MEMBERS_USAGE(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_MEMBER_USAGE, , args))
-#define GMOCK_INTERNAL_MATCHER_MEMBER_USAGE(i_unused, data_unused, arg) , arg
-
-#define GMOCK_INTERNAL_MATCHER_ARGS_USAGE(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_ARG_USAGE, , args))
-#define GMOCK_INTERNAL_MATCHER_ARG_USAGE(i, data_unused, arg_unused) \
-  , gmock_p##i
-
-// To prevent ADL on certain functions we put them on a separate namespace.
-using namespace no_adl;  // NOLINT
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
-
-// Include any custom callback matchers added by the local installation.
-// We must include this header at the end to make sure it can use the
-// declarations from this file.
-#include "gmock/internal/custom/gmock-matchers.h"
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-more-actions.h b/third_party/googletest/googlemock/include/gmock/gmock-more-actions.h
deleted file mode 100644
index fd29335..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-more-actions.h
+++ /dev/null
@@ -1,573 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements some commonly used variadic actions.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
-
-#include <memory>
-#include <utility>
-
-#include "gmock/gmock-actions.h"
-#include "gmock/internal/gmock-port.h"
-
-// Include any custom callback actions added by the local installation.
-#include "gmock/internal/custom/gmock-generated-actions.h"
-
-// Sometimes you want to give an action explicit template parameters
-// that cannot be inferred from its value parameters.  ACTION() and
-// ACTION_P*() don't support that.  ACTION_TEMPLATE() remedies that
-// and can be viewed as an extension to ACTION() and ACTION_P*().
-//
-// The syntax:
-//
-//   ACTION_TEMPLATE(ActionName,
-//                   HAS_m_TEMPLATE_PARAMS(kind1, name1, ..., kind_m, name_m),
-//                   AND_n_VALUE_PARAMS(p1, ..., p_n)) { statements; }
-//
-// defines an action template that takes m explicit template
-// parameters and n value parameters.  name_i is the name of the i-th
-// template parameter, and kind_i specifies whether it's a typename,
-// an integral constant, or a template.  p_i is the name of the i-th
-// value parameter.
-//
-// Example:
-//
-//   // DuplicateArg<k, T>(output) converts the k-th argument of the mock
-//   // function to type T and copies it to *output.
-//   ACTION_TEMPLATE(DuplicateArg,
-//                   HAS_2_TEMPLATE_PARAMS(int, k, typename, T),
-//                   AND_1_VALUE_PARAMS(output)) {
-//     *output = T(::std::get<k>(args));
-//   }
-//   ...
-//     int n;
-//     EXPECT_CALL(mock, Foo(_, _))
-//         .WillOnce(DuplicateArg<1, unsigned char>(&n));
-//
-// To create an instance of an action template, write:
-//
-//   ActionName<t1, ..., t_m>(v1, ..., v_n)
-//
-// where the ts are the template arguments and the vs are the value
-// arguments.  The value argument types are inferred by the compiler.
-// If you want to explicitly specify the value argument types, you can
-// provide additional template arguments:
-//
-//   ActionName<t1, ..., t_m, u1, ..., u_k>(v1, ..., v_n)
-//
-// where u_i is the desired type of v_i.
-//
-// ACTION_TEMPLATE and ACTION/ACTION_P* can be overloaded on the
-// number of value parameters, but not on the number of template
-// parameters.  Without the restriction, the meaning of the following
-// is unclear:
-//
-//   OverloadedAction<int, bool>(x);
-//
-// Are we using a single-template-parameter action where 'bool' refers
-// to the type of x, or are we using a two-template-parameter action
-// where the compiler is asked to infer the type of x?
-//
-// Implementation notes:
-//
-// GMOCK_INTERNAL_*_HAS_m_TEMPLATE_PARAMS and
-// GMOCK_INTERNAL_*_AND_n_VALUE_PARAMS are internal macros for
-// implementing ACTION_TEMPLATE.  The main trick we use is to create
-// new macro invocations when expanding a macro.  For example, we have
-//
-//   #define ACTION_TEMPLATE(name, template_params, value_params)
-//       ... GMOCK_INTERNAL_DECL_##template_params ...
-//
-// which causes ACTION_TEMPLATE(..., HAS_1_TEMPLATE_PARAMS(typename, T), ...)
-// to expand to
-//
-//       ... GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS(typename, T) ...
-//
-// Since GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS is a macro, the
-// preprocessor will continue to expand it to
-//
-//       ... typename T ...
-//
-// This technique conforms to the C++ standard and is portable.  It
-// allows us to implement action templates using O(N) code, where N is
-// the maximum number of template/value parameters supported.  Without
-// using it, we'd have to devote O(N^2) amount of code to implement all
-// combinations of m and n.
-
-// Declares the template parameters.
-#define GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS(kind0, name0) kind0 name0
-#define GMOCK_INTERNAL_DECL_HAS_2_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1) kind0 name0, kind1 name1
-#define GMOCK_INTERNAL_DECL_HAS_3_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2) kind0 name0, kind1 name1, kind2 name2
-#define GMOCK_INTERNAL_DECL_HAS_4_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3) kind0 name0, kind1 name1, kind2 name2, \
-    kind3 name3
-#define GMOCK_INTERNAL_DECL_HAS_5_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4) kind0 name0, kind1 name1, \
-    kind2 name2, kind3 name3, kind4 name4
-#define GMOCK_INTERNAL_DECL_HAS_6_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5) kind0 name0, \
-    kind1 name1, kind2 name2, kind3 name3, kind4 name4, kind5 name5
-#define GMOCK_INTERNAL_DECL_HAS_7_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6) kind0 name0, kind1 name1, kind2 name2, kind3 name3, kind4 name4, \
-    kind5 name5, kind6 name6
-#define GMOCK_INTERNAL_DECL_HAS_8_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7) kind0 name0, kind1 name1, kind2 name2, kind3 name3, \
-    kind4 name4, kind5 name5, kind6 name6, kind7 name7
-#define GMOCK_INTERNAL_DECL_HAS_9_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7, kind8, name8) kind0 name0, kind1 name1, kind2 name2, \
-    kind3 name3, kind4 name4, kind5 name5, kind6 name6, kind7 name7, \
-    kind8 name8
-#define GMOCK_INTERNAL_DECL_HAS_10_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1, kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6, kind7, name7, kind8, name8, kind9, name9) kind0 name0, \
-    kind1 name1, kind2 name2, kind3 name3, kind4 name4, kind5 name5, \
-    kind6 name6, kind7 name7, kind8 name8, kind9 name9
-
-// Lists the template parameters.
-#define GMOCK_INTERNAL_LIST_HAS_1_TEMPLATE_PARAMS(kind0, name0) name0
-#define GMOCK_INTERNAL_LIST_HAS_2_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1) name0, name1
-#define GMOCK_INTERNAL_LIST_HAS_3_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2) name0, name1, name2
-#define GMOCK_INTERNAL_LIST_HAS_4_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3) name0, name1, name2, name3
-#define GMOCK_INTERNAL_LIST_HAS_5_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4) name0, name1, name2, name3, \
-    name4
-#define GMOCK_INTERNAL_LIST_HAS_6_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5) name0, name1, \
-    name2, name3, name4, name5
-#define GMOCK_INTERNAL_LIST_HAS_7_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6) name0, name1, name2, name3, name4, name5, name6
-#define GMOCK_INTERNAL_LIST_HAS_8_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7) name0, name1, name2, name3, name4, name5, name6, name7
-#define GMOCK_INTERNAL_LIST_HAS_9_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7, kind8, name8) name0, name1, name2, name3, name4, name5, \
-    name6, name7, name8
-#define GMOCK_INTERNAL_LIST_HAS_10_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1, kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6, kind7, name7, kind8, name8, kind9, name9) name0, name1, name2, \
-    name3, name4, name5, name6, name7, name8, name9
-
-// Declares the types of value parameters.
-#define GMOCK_INTERNAL_DECL_TYPE_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_DECL_TYPE_AND_1_VALUE_PARAMS(p0) , typename p0##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_2_VALUE_PARAMS(p0, p1) , \
-    typename p0##_type, typename p1##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_3_VALUE_PARAMS(p0, p1, p2) , \
-    typename p0##_type, typename p1##_type, typename p2##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_4_VALUE_PARAMS(p0, p1, p2, p3) , \
-    typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) , \
-    typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) , \
-    typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) , typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type, \
-    typename p6##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7) , typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type, \
-    typename p6##_type, typename p7##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8) , typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type, \
-    typename p6##_type, typename p7##_type, typename p8##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8, p9) , typename p0##_type, typename p1##_type, \
-    typename p2##_type, typename p3##_type, typename p4##_type, \
-    typename p5##_type, typename p6##_type, typename p7##_type, \
-    typename p8##_type, typename p9##_type
-
-// Initializes the value parameters.
-#define GMOCK_INTERNAL_INIT_AND_0_VALUE_PARAMS()\
-    ()
-#define GMOCK_INTERNAL_INIT_AND_1_VALUE_PARAMS(p0)\
-    (p0##_type gmock_p0) : p0(::std::move(gmock_p0))
-#define GMOCK_INTERNAL_INIT_AND_2_VALUE_PARAMS(p0, p1)\
-    (p0##_type gmock_p0, p1##_type gmock_p1) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1))
-#define GMOCK_INTERNAL_INIT_AND_3_VALUE_PARAMS(p0, p1, p2)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, \
-        p2##_type gmock_p2) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2))
-#define GMOCK_INTERNAL_INIT_AND_4_VALUE_PARAMS(p0, p1, p2, p3)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3))
-#define GMOCK_INTERNAL_INIT_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4))
-#define GMOCK_INTERNAL_INIT_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, \
-        p5##_type gmock_p5) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5))
-#define GMOCK_INTERNAL_INIT_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6))
-#define GMOCK_INTERNAL_INIT_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, p7)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6, p7##_type gmock_p7) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
-        p7(::std::move(gmock_p7))
-#define GMOCK_INTERNAL_INIT_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6, p7##_type gmock_p7, \
-        p8##_type gmock_p8) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
-        p7(::std::move(gmock_p7)), p8(::std::move(gmock_p8))
-#define GMOCK_INTERNAL_INIT_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6, p7##_type gmock_p7, p8##_type gmock_p8, \
-        p9##_type gmock_p9) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
-        p7(::std::move(gmock_p7)), p8(::std::move(gmock_p8)), \
-        p9(::std::move(gmock_p9))
-
-// Defines the copy constructor
-#define GMOCK_INTERNAL_DEFN_COPY_AND_0_VALUE_PARAMS() \
-    {}  // Avoid https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82134
-#define GMOCK_INTERNAL_DEFN_COPY_AND_1_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_2_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_3_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_4_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_5_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_6_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_7_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_8_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_9_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_10_VALUE_PARAMS(...) = default;
-
-// Declares the fields for storing the value parameters.
-#define GMOCK_INTERNAL_DEFN_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_DEFN_AND_1_VALUE_PARAMS(p0) p0##_type p0;
-#define GMOCK_INTERNAL_DEFN_AND_2_VALUE_PARAMS(p0, p1) p0##_type p0; \
-    p1##_type p1;
-#define GMOCK_INTERNAL_DEFN_AND_3_VALUE_PARAMS(p0, p1, p2) p0##_type p0; \
-    p1##_type p1; p2##_type p2;
-#define GMOCK_INTERNAL_DEFN_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0##_type p0; \
-    p1##_type p1; p2##_type p2; p3##_type p3;
-#define GMOCK_INTERNAL_DEFN_AND_5_VALUE_PARAMS(p0, p1, p2, p3, \
-    p4) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4;
-#define GMOCK_INTERNAL_DEFN_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, \
-    p5) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
-    p5##_type p5;
-#define GMOCK_INTERNAL_DEFN_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
-    p5##_type p5; p6##_type p6;
-#define GMOCK_INTERNAL_DEFN_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
-    p5##_type p5; p6##_type p6; p7##_type p7;
-#define GMOCK_INTERNAL_DEFN_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; \
-    p4##_type p4; p5##_type p5; p6##_type p6; p7##_type p7; p8##_type p8;
-#define GMOCK_INTERNAL_DEFN_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; \
-    p4##_type p4; p5##_type p5; p6##_type p6; p7##_type p7; p8##_type p8; \
-    p9##_type p9;
-
-// Lists the value parameters.
-#define GMOCK_INTERNAL_LIST_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_LIST_AND_1_VALUE_PARAMS(p0) p0
-#define GMOCK_INTERNAL_LIST_AND_2_VALUE_PARAMS(p0, p1) p0, p1
-#define GMOCK_INTERNAL_LIST_AND_3_VALUE_PARAMS(p0, p1, p2) p0, p1, p2
-#define GMOCK_INTERNAL_LIST_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0, p1, p2, p3
-#define GMOCK_INTERNAL_LIST_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) p0, p1, \
-    p2, p3, p4
-#define GMOCK_INTERNAL_LIST_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) p0, \
-    p1, p2, p3, p4, p5
-#define GMOCK_INTERNAL_LIST_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) p0, p1, p2, p3, p4, p5, p6
-#define GMOCK_INTERNAL_LIST_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) p0, p1, p2, p3, p4, p5, p6, p7
-#define GMOCK_INTERNAL_LIST_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) p0, p1, p2, p3, p4, p5, p6, p7, p8
-#define GMOCK_INTERNAL_LIST_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) p0, p1, p2, p3, p4, p5, p6, p7, p8, p9
-
-// Lists the value parameter types.
-#define GMOCK_INTERNAL_LIST_TYPE_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_LIST_TYPE_AND_1_VALUE_PARAMS(p0) , p0##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_2_VALUE_PARAMS(p0, p1) , p0##_type, \
-    p1##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_3_VALUE_PARAMS(p0, p1, p2) , p0##_type, \
-    p1##_type, p2##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_4_VALUE_PARAMS(p0, p1, p2, p3) , \
-    p0##_type, p1##_type, p2##_type, p3##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) , \
-    p0##_type, p1##_type, p2##_type, p3##_type, p4##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) , \
-    p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, p5##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, p5##_type, \
-    p6##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
-    p5##_type, p6##_type, p7##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
-    p5##_type, p6##_type, p7##_type, p8##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8, p9) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
-    p5##_type, p6##_type, p7##_type, p8##_type, p9##_type
-
-// Declares the value parameters.
-#define GMOCK_INTERNAL_DECL_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_DECL_AND_1_VALUE_PARAMS(p0) p0##_type p0
-#define GMOCK_INTERNAL_DECL_AND_2_VALUE_PARAMS(p0, p1) p0##_type p0, \
-    p1##_type p1
-#define GMOCK_INTERNAL_DECL_AND_3_VALUE_PARAMS(p0, p1, p2) p0##_type p0, \
-    p1##_type p1, p2##_type p2
-#define GMOCK_INTERNAL_DECL_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0##_type p0, \
-    p1##_type p1, p2##_type p2, p3##_type p3
-#define GMOCK_INTERNAL_DECL_AND_5_VALUE_PARAMS(p0, p1, p2, p3, \
-    p4) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4
-#define GMOCK_INTERNAL_DECL_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, \
-    p5) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
-    p5##_type p5
-#define GMOCK_INTERNAL_DECL_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
-    p5##_type p5, p6##_type p6
-#define GMOCK_INTERNAL_DECL_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
-    p5##_type p5, p6##_type p6, p7##_type p7
-#define GMOCK_INTERNAL_DECL_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, \
-    p4##_type p4, p5##_type p5, p6##_type p6, p7##_type p7, p8##_type p8
-#define GMOCK_INTERNAL_DECL_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, \
-    p4##_type p4, p5##_type p5, p6##_type p6, p7##_type p7, p8##_type p8, \
-    p9##_type p9
-
-// The suffix of the class template implementing the action template.
-#define GMOCK_INTERNAL_COUNT_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_COUNT_AND_1_VALUE_PARAMS(p0) P
-#define GMOCK_INTERNAL_COUNT_AND_2_VALUE_PARAMS(p0, p1) P2
-#define GMOCK_INTERNAL_COUNT_AND_3_VALUE_PARAMS(p0, p1, p2) P3
-#define GMOCK_INTERNAL_COUNT_AND_4_VALUE_PARAMS(p0, p1, p2, p3) P4
-#define GMOCK_INTERNAL_COUNT_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) P5
-#define GMOCK_INTERNAL_COUNT_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) P6
-#define GMOCK_INTERNAL_COUNT_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6) P7
-#define GMOCK_INTERNAL_COUNT_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) P8
-#define GMOCK_INTERNAL_COUNT_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) P9
-#define GMOCK_INTERNAL_COUNT_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) P10
-
-// The name of the class template implementing the action template.
-#define GMOCK_ACTION_CLASS_(name, value_params)\
-    GTEST_CONCAT_TOKEN_(name##Action, GMOCK_INTERNAL_COUNT_##value_params)
-
-#define ACTION_TEMPLATE(name, template_params, value_params)                   \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  class GMOCK_ACTION_CLASS_(name, value_params) {                              \
-   public:                                                                     \
-    explicit GMOCK_ACTION_CLASS_(name, value_params)(                          \
-        GMOCK_INTERNAL_DECL_##value_params)                                    \
-        GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),    \
-                    = default; ,                                               \
-                    : impl_(std::make_shared<gmock_Impl>(                      \
-                                GMOCK_INTERNAL_LIST_##value_params)) { })      \
-    GMOCK_ACTION_CLASS_(name, value_params)(                                   \
-        const GMOCK_ACTION_CLASS_(name, value_params)&) noexcept               \
-        GMOCK_INTERNAL_DEFN_COPY_##value_params                                \
-    GMOCK_ACTION_CLASS_(name, value_params)(                                   \
-        GMOCK_ACTION_CLASS_(name, value_params)&&) noexcept                    \
-        GMOCK_INTERNAL_DEFN_COPY_##value_params                                \
-    template <typename F>                                                      \
-    operator ::testing::Action<F>() const {                                    \
-      return GMOCK_PP_IF(                                                      \
-          GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),              \
-                      (::testing::internal::MakeAction<F, gmock_Impl>()),      \
-                      (::testing::internal::MakeAction<F>(impl_)));            \
-    }                                                                          \
-   private:                                                                    \
-    class gmock_Impl {                                                         \
-     public:                                                                   \
-      explicit gmock_Impl GMOCK_INTERNAL_INIT_##value_params {}                \
-      template <typename function_type, typename return_type,                  \
-                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>         \
-      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const;  \
-      GMOCK_INTERNAL_DEFN_##value_params                                       \
-    };                                                                         \
-    GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),        \
-                , std::shared_ptr<const gmock_Impl> impl_;)                    \
-  };                                                                           \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  GMOCK_ACTION_CLASS_(name, value_params)<                                     \
-      GMOCK_INTERNAL_LIST_##template_params                                    \
-      GMOCK_INTERNAL_LIST_TYPE_##value_params> name(                           \
-          GMOCK_INTERNAL_DECL_##value_params) GTEST_MUST_USE_RESULT_;          \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  inline GMOCK_ACTION_CLASS_(name, value_params)<                              \
-      GMOCK_INTERNAL_LIST_##template_params                                    \
-      GMOCK_INTERNAL_LIST_TYPE_##value_params> name(                           \
-          GMOCK_INTERNAL_DECL_##value_params) {                                \
-    return GMOCK_ACTION_CLASS_(name, value_params)<                            \
-        GMOCK_INTERNAL_LIST_##template_params                                  \
-        GMOCK_INTERNAL_LIST_TYPE_##value_params>(                              \
-            GMOCK_INTERNAL_LIST_##value_params);                               \
-  }                                                                            \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  template <typename function_type, typename return_type, typename args_type,  \
-            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                 \
-  return_type GMOCK_ACTION_CLASS_(name, value_params)<                         \
-      GMOCK_INTERNAL_LIST_##template_params                                    \
-      GMOCK_INTERNAL_LIST_TYPE_##value_params>::gmock_Impl::gmock_PerformImpl( \
-          GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
-
-namespace testing {
-
-// The ACTION*() macros trigger warning C4100 (unreferenced formal
-// parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
-// the macro definition, as the warnings are generated when the macro
-// is expanded and macro expansion cannot contain #pragma.  Therefore
-// we suppress them here.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-namespace internal {
-
-// internal::InvokeArgument - a helper for InvokeArgument action.
-// The basic overloads are provided here for generic functors.
-// Overloads for other custom-callables are provided in the
-// internal/custom/gmock-generated-actions.h header.
-template <typename F, typename... Args>
-auto InvokeArgument(F f, Args... args) -> decltype(f(args...)) {
-  return f(args...);
-}
-
-template <std::size_t index, typename... Params>
-struct InvokeArgumentAction {
-  template <typename... Args>
-  auto operator()(Args&&... args) const -> decltype(internal::InvokeArgument(
-      std::get<index>(std::forward_as_tuple(std::forward<Args>(args)...)),
-      std::declval<const Params&>()...)) {
-    internal::FlatTuple<Args&&...> args_tuple(FlatTupleConstructTag{},
-                                              std::forward<Args>(args)...);
-    return params.Apply([&](const Params&... unpacked_params) {
-      auto&& callable = args_tuple.template Get<index>();
-      return internal::InvokeArgument(
-          std::forward<decltype(callable)>(callable), unpacked_params...);
-    });
-  }
-
-  internal::FlatTuple<Params...> params;
-};
-
-}  // namespace internal
-
-// The InvokeArgument<N>(a1, a2, ..., a_k) action invokes the N-th
-// (0-based) argument, which must be a k-ary callable, of the mock
-// function, with arguments a1, a2, ..., a_k.
-//
-// Notes:
-//
-//   1. The arguments are passed by value by default.  If you need to
-//   pass an argument by reference, wrap it inside std::ref().  For
-//   example,
-//
-//     InvokeArgument<1>(5, string("Hello"), std::ref(foo))
-//
-//   passes 5 and string("Hello") by value, and passes foo by
-//   reference.
-//
-//   2. If the callable takes an argument by reference but std::ref() is
-//   not used, it will receive the reference to a copy of the value,
-//   instead of the original value.  For example, when the 0-th
-//   argument of the mock function takes a const string&, the action
-//
-//     InvokeArgument<0>(string("Hello"))
-//
-//   makes a copy of the temporary string("Hello") object and passes a
-//   reference of the copy, instead of the original temporary object,
-//   to the callable.  This makes it easy for a user to define an
-//   InvokeArgument action from temporary values and have it performed
-//   later.
-template <std::size_t index, typename... Params>
-internal::InvokeArgumentAction<index, typename std::decay<Params>::type...>
-InvokeArgument(Params&&... params) {
-  return {internal::FlatTuple<typename std::decay<Params>::type...>(
-      internal::FlatTupleConstructTag{}, std::forward<Params>(params)...)};
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-more-matchers.h b/third_party/googletest/googlemock/include/gmock/gmock-more-matchers.h
deleted file mode 100644
index dfc77e3..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-more-matchers.h
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements some matchers that depend on gmock-matchers.h.
-//
-// Note that tests are implemented in gmock-matchers_test.cc rather than
-// gmock-more-matchers-test.cc.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
-
-#include "gmock/gmock-matchers.h"
-
-namespace testing {
-
-// Silence C4100 (unreferenced formal
-// parameter) for MSVC
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#if (_MSC_VER == 1900)
-// and silence C4800 (C4800: 'int *const ': forcing value
-// to bool 'true' or 'false') for MSVC 14
-# pragma warning(disable:4800)
-  #endif
-#endif
-
-// Defines a matcher that matches an empty container. The container must
-// support both size() and empty(), which all STL-like containers provide.
-MATCHER(IsEmpty, negation ? "isn't empty" : "is empty") {
-  if (arg.empty()) {
-    return true;
-  }
-  *result_listener << "whose size is " << arg.size();
-  return false;
-}
-
-// Define a matcher that matches a value that evaluates in boolean
-// context to true.  Useful for types that define "explicit operator
-// bool" operators and so can't be compared for equality with true
-// and false.
-MATCHER(IsTrue, negation ? "is false" : "is true") {
-  return static_cast<bool>(arg);
-}
-
-// Define a matcher that matches a value that evaluates in boolean
-// context to false.  Useful for types that define "explicit operator
-// bool" operators and so can't be compared for equality with true
-// and false.
-MATCHER(IsFalse, negation ? "is true" : "is false") {
-  return !static_cast<bool>(arg);
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-nice-strict.h b/third_party/googletest/googlemock/include/gmock/gmock-nice-strict.h
deleted file mode 100644
index b03b770..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-nice-strict.h
+++ /dev/null
@@ -1,261 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Implements class templates NiceMock, NaggyMock, and StrictMock.
-//
-// Given a mock class MockFoo that is created using Google Mock,
-// NiceMock<MockFoo> is a subclass of MockFoo that allows
-// uninteresting calls (i.e. calls to mock methods that have no
-// EXPECT_CALL specs), NaggyMock<MockFoo> is a subclass of MockFoo
-// that prints a warning when an uninteresting call occurs, and
-// StrictMock<MockFoo> is a subclass of MockFoo that treats all
-// uninteresting calls as errors.
-//
-// Currently a mock is naggy by default, so MockFoo and
-// NaggyMock<MockFoo> behave like the same.  However, we will soon
-// switch the default behavior of mocks to be nice, as that in general
-// leads to more maintainable tests.  When that happens, MockFoo will
-// stop behaving like NaggyMock<MockFoo> and start behaving like
-// NiceMock<MockFoo>.
-//
-// NiceMock, NaggyMock, and StrictMock "inherit" the constructors of
-// their respective base class.  Therefore you can write
-// NiceMock<MockFoo>(5, "a") to construct a nice mock where MockFoo
-// has a constructor that accepts (int, const char*), for example.
-//
-// A known limitation is that NiceMock<MockFoo>, NaggyMock<MockFoo>,
-// and StrictMock<MockFoo> only works for mock methods defined using
-// the MOCK_METHOD* family of macros DIRECTLY in the MockFoo class.
-// If a mock method is defined in a base class of MockFoo, the "nice"
-// or "strict" modifier may not affect it, depending on the compiler.
-// In particular, nesting NiceMock, NaggyMock, and StrictMock is NOT
-// supported.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
-
-#include <type_traits>
-
-#include "gmock/gmock-spec-builders.h"
-#include "gmock/internal/gmock-port.h"
-
-namespace testing {
-template <class MockClass>
-class NiceMock;
-template <class MockClass>
-class NaggyMock;
-template <class MockClass>
-class StrictMock;
-
-namespace internal {
-template <typename T>
-std::true_type StrictnessModifierProbe(const NiceMock<T>&);
-template <typename T>
-std::true_type StrictnessModifierProbe(const NaggyMock<T>&);
-template <typename T>
-std::true_type StrictnessModifierProbe(const StrictMock<T>&);
-std::false_type StrictnessModifierProbe(...);
-
-template <typename T>
-constexpr bool HasStrictnessModifier() {
-  return decltype(StrictnessModifierProbe(std::declval<const T&>()))::value;
-}
-
-// Base classes that register and deregister with testing::Mock to alter the
-// default behavior around uninteresting calls. Inheriting from one of these
-// classes first and then MockClass ensures the MockClass constructor is run
-// after registration, and that the MockClass destructor runs before
-// deregistration. This guarantees that MockClass's constructor and destructor
-// run with the same level of strictness as its instance methods.
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW && \
-    (defined(_MSC_VER) || defined(__clang__))
-// We need to mark these classes with this declspec to ensure that
-// the empty base class optimization is performed.
-#define GTEST_INTERNAL_EMPTY_BASE_CLASS __declspec(empty_bases)
-#else
-#define GTEST_INTERNAL_EMPTY_BASE_CLASS
-#endif
-
-template <typename Base>
-class NiceMockImpl {
- public:
-  NiceMockImpl() { ::testing::Mock::AllowUninterestingCalls(this); }
-
-  ~NiceMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
-};
-
-template <typename Base>
-class NaggyMockImpl {
- public:
-  NaggyMockImpl() { ::testing::Mock::WarnUninterestingCalls(this); }
-
-  ~NaggyMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
-};
-
-template <typename Base>
-class StrictMockImpl {
- public:
-  StrictMockImpl() { ::testing::Mock::FailUninterestingCalls(this); }
-
-  ~StrictMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
-};
-
-}  // namespace internal
-
-template <class MockClass>
-class GTEST_INTERNAL_EMPTY_BASE_CLASS NiceMock
-    : private internal::NiceMockImpl<MockClass>,
-      public MockClass {
- public:
-  static_assert(!internal::HasStrictnessModifier<MockClass>(),
-                "Can't apply NiceMock to a class hierarchy that already has a "
-                "strictness modifier. See "
-                "https://google.github.io/googletest/"
-                "gmock_cook_book.html#NiceStrictNaggy");
-  NiceMock() : MockClass() {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  // Ideally, we would inherit base class's constructors through a using
-  // declaration, which would preserve their visibility. However, many existing
-  // tests rely on the fact that current implementation reexports protected
-  // constructors as public. These tests would need to be cleaned up first.
-
-  // Single argument constructor is special-cased so that it can be
-  // made explicit.
-  template <typename A>
-  explicit NiceMock(A&& arg) : MockClass(std::forward<A>(arg)) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  template <typename TArg1, typename TArg2, typename... An>
-  NiceMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
-      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
-                  std::forward<An>(args)...) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(NiceMock);
-};
-
-template <class MockClass>
-class GTEST_INTERNAL_EMPTY_BASE_CLASS NaggyMock
-    : private internal::NaggyMockImpl<MockClass>,
-      public MockClass {
-  static_assert(!internal::HasStrictnessModifier<MockClass>(),
-                "Can't apply NaggyMock to a class hierarchy that already has a "
-                "strictness modifier. See "
-                "https://google.github.io/googletest/"
-                "gmock_cook_book.html#NiceStrictNaggy");
-
- public:
-  NaggyMock() : MockClass() {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  // Ideally, we would inherit base class's constructors through a using
-  // declaration, which would preserve their visibility. However, many existing
-  // tests rely on the fact that current implementation reexports protected
-  // constructors as public. These tests would need to be cleaned up first.
-
-  // Single argument constructor is special-cased so that it can be
-  // made explicit.
-  template <typename A>
-  explicit NaggyMock(A&& arg) : MockClass(std::forward<A>(arg)) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  template <typename TArg1, typename TArg2, typename... An>
-  NaggyMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
-      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
-                  std::forward<An>(args)...) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(NaggyMock);
-};
-
-template <class MockClass>
-class GTEST_INTERNAL_EMPTY_BASE_CLASS StrictMock
-    : private internal::StrictMockImpl<MockClass>,
-      public MockClass {
- public:
-  static_assert(
-      !internal::HasStrictnessModifier<MockClass>(),
-      "Can't apply StrictMock to a class hierarchy that already has a "
-      "strictness modifier. See "
-      "https://google.github.io/googletest/"
-      "gmock_cook_book.html#NiceStrictNaggy");
-  StrictMock() : MockClass() {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  // Ideally, we would inherit base class's constructors through a using
-  // declaration, which would preserve their visibility. However, many existing
-  // tests rely on the fact that current implementation reexports protected
-  // constructors as public. These tests would need to be cleaned up first.
-
-  // Single argument constructor is special-cased so that it can be
-  // made explicit.
-  template <typename A>
-  explicit StrictMock(A&& arg) : MockClass(std::forward<A>(arg)) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  template <typename TArg1, typename TArg2, typename... An>
-  StrictMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
-      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
-                  std::forward<An>(args)...) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StrictMock);
-};
-
-#undef GTEST_INTERNAL_EMPTY_BASE_CLASS
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock-spec-builders.h b/third_party/googletest/googlemock/include/gmock/gmock-spec-builders.h
deleted file mode 100644
index f1bd79c..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock-spec-builders.h
+++ /dev/null
@@ -1,2036 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements the ON_CALL() and EXPECT_CALL() macros.
-//
-// A user can use the ON_CALL() macro to specify the default action of
-// a mock method.  The syntax is:
-//
-//   ON_CALL(mock_object, Method(argument-matchers))
-//       .With(multi-argument-matcher)
-//       .WillByDefault(action);
-//
-//  where the .With() clause is optional.
-//
-// A user can use the EXPECT_CALL() macro to specify an expectation on
-// a mock method.  The syntax is:
-//
-//   EXPECT_CALL(mock_object, Method(argument-matchers))
-//       .With(multi-argument-matchers)
-//       .Times(cardinality)
-//       .InSequence(sequences)
-//       .After(expectations)
-//       .WillOnce(action)
-//       .WillRepeatedly(action)
-//       .RetiresOnSaturation();
-//
-// where all clauses are optional, and .InSequence()/.After()/
-// .WillOnce() can appear any number of times.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
-
-#include <functional>
-#include <map>
-#include <memory>
-#include <set>
-#include <sstream>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-#include "gmock/gmock-actions.h"
-#include "gmock/gmock-cardinalities.h"
-#include "gmock/gmock-matchers.h"
-#include "gmock/internal/gmock-internal-utils.h"
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>  // NOLINT
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// An abstract handle of an expectation.
-class Expectation;
-
-// A set of expectation handles.
-class ExpectationSet;
-
-// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
-// and MUST NOT BE USED IN USER CODE!!!
-namespace internal {
-
-// Implements a mock function.
-template <typename F> class FunctionMocker;
-
-// Base class for expectations.
-class ExpectationBase;
-
-// Implements an expectation.
-template <typename F> class TypedExpectation;
-
-// Helper class for testing the Expectation class template.
-class ExpectationTester;
-
-// Helper classes for implementing NiceMock, StrictMock, and NaggyMock.
-template <typename MockClass>
-class NiceMockImpl;
-template <typename MockClass>
-class StrictMockImpl;
-template <typename MockClass>
-class NaggyMockImpl;
-
-// Protects the mock object registry (in class Mock), all function
-// mockers, and all expectations.
-//
-// The reason we don't use more fine-grained protection is: when a
-// mock function Foo() is called, it needs to consult its expectations
-// to see which one should be picked.  If another thread is allowed to
-// call a mock function (either Foo() or a different one) at the same
-// time, it could affect the "retired" attributes of Foo()'s
-// expectations when InSequence() is used, and thus affect which
-// expectation gets picked.  Therefore, we sequence all mock function
-// calls to ensure the integrity of the mock objects' states.
-GTEST_API_ GTEST_DECLARE_STATIC_MUTEX_(g_gmock_mutex);
-
-// Untyped base class for ActionResultHolder<R>.
-class UntypedActionResultHolderBase;
-
-// Abstract base class of FunctionMocker.  This is the
-// type-agnostic part of the function mocker interface.  Its pure
-// virtual methods are implemented by FunctionMocker.
-class GTEST_API_ UntypedFunctionMockerBase {
- public:
-  UntypedFunctionMockerBase();
-  virtual ~UntypedFunctionMockerBase();
-
-  // Verifies that all expectations on this mock function have been
-  // satisfied.  Reports one or more Google Test non-fatal failures
-  // and returns false if not.
-  bool VerifyAndClearExpectationsLocked()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Clears the ON_CALL()s set on this mock function.
-  virtual void ClearDefaultActionsLocked()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) = 0;
-
-  // In all of the following Untyped* functions, it's the caller's
-  // responsibility to guarantee the correctness of the arguments'
-  // types.
-
-  // Performs the default action with the given arguments and returns
-  // the action's result.  The call description string will be used in
-  // the error message to describe the call in the case the default
-  // action fails.
-  // L = *
-  virtual UntypedActionResultHolderBase* UntypedPerformDefaultAction(
-      void* untyped_args, const std::string& call_description) const = 0;
-
-  // Performs the given action with the given arguments and returns
-  // the action's result.
-  // L = *
-  virtual UntypedActionResultHolderBase* UntypedPerformAction(
-      const void* untyped_action, void* untyped_args) const = 0;
-
-  // Writes a message that the call is uninteresting (i.e. neither
-  // explicitly expected nor explicitly unexpected) to the given
-  // ostream.
-  virtual void UntypedDescribeUninterestingCall(
-      const void* untyped_args,
-      ::std::ostream* os) const
-          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
-
-  // Returns the expectation that matches the given function arguments
-  // (or NULL is there's no match); when a match is found,
-  // untyped_action is set to point to the action that should be
-  // performed (or NULL if the action is "do default"), and
-  // is_excessive is modified to indicate whether the call exceeds the
-  // expected number.
-  virtual const ExpectationBase* UntypedFindMatchingExpectation(
-      const void* untyped_args,
-      const void** untyped_action, bool* is_excessive,
-      ::std::ostream* what, ::std::ostream* why)
-          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
-
-  // Prints the given function arguments to the ostream.
-  virtual void UntypedPrintArgs(const void* untyped_args,
-                                ::std::ostream* os) const = 0;
-
-  // Sets the mock object this mock method belongs to, and registers
-  // this information in the global mock registry.  Will be called
-  // whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
-  // method.
-  void RegisterOwner(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Sets the mock object this mock method belongs to, and sets the
-  // name of the mock function.  Will be called upon each invocation
-  // of this mock function.
-  void SetOwnerAndName(const void* mock_obj, const char* name)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Returns the mock object this mock method belongs to.  Must be
-  // called after RegisterOwner() or SetOwnerAndName() has been
-  // called.
-  const void* MockObject() const
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Returns the name of this mock method.  Must be called after
-  // SetOwnerAndName() has been called.
-  const char* Name() const
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Returns the result of invoking this mock function with the given
-  // arguments.  This function can be safely called from multiple
-  // threads concurrently.  The caller is responsible for deleting the
-  // result.
-  UntypedActionResultHolderBase* UntypedInvokeWith(void* untyped_args)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
- protected:
-  typedef std::vector<const void*> UntypedOnCallSpecs;
-
-  using UntypedExpectations = std::vector<std::shared_ptr<ExpectationBase>>;
-
-  // Returns an Expectation object that references and co-owns exp,
-  // which must be an expectation on this mock function.
-  Expectation GetHandleOf(ExpectationBase* exp);
-
-  // Address of the mock object this mock method belongs to.  Only
-  // valid after this mock method has been called or
-  // ON_CALL/EXPECT_CALL has been invoked on it.
-  const void* mock_obj_;  // Protected by g_gmock_mutex.
-
-  // Name of the function being mocked.  Only valid after this mock
-  // method has been called.
-  const char* name_;  // Protected by g_gmock_mutex.
-
-  // All default action specs for this function mocker.
-  UntypedOnCallSpecs untyped_on_call_specs_;
-
-  // All expectations for this function mocker.
-  //
-  // It's undefined behavior to interleave expectations (EXPECT_CALLs
-  // or ON_CALLs) and mock function calls.  Also, the order of
-  // expectations is important.  Therefore it's a logic race condition
-  // to read/write untyped_expectations_ concurrently.  In order for
-  // tools like tsan to catch concurrent read/write accesses to
-  // untyped_expectations, we deliberately leave accesses to it
-  // unprotected.
-  UntypedExpectations untyped_expectations_;
-};  // class UntypedFunctionMockerBase
-
-// Untyped base class for OnCallSpec<F>.
-class UntypedOnCallSpecBase {
- public:
-  // The arguments are the location of the ON_CALL() statement.
-  UntypedOnCallSpecBase(const char* a_file, int a_line)
-      : file_(a_file), line_(a_line), last_clause_(kNone) {}
-
-  // Where in the source file was the default action spec defined?
-  const char* file() const { return file_; }
-  int line() const { return line_; }
-
- protected:
-  // Gives each clause in the ON_CALL() statement a name.
-  enum Clause {
-    // Do not change the order of the enum members!  The run-time
-    // syntax checking relies on it.
-    kNone,
-    kWith,
-    kWillByDefault
-  };
-
-  // Asserts that the ON_CALL() statement has a certain property.
-  void AssertSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Assert(property, file_, line_, failure_message);
-  }
-
-  // Expects that the ON_CALL() statement has a certain property.
-  void ExpectSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Expect(property, file_, line_, failure_message);
-  }
-
-  const char* file_;
-  int line_;
-
-  // The last clause in the ON_CALL() statement as seen so far.
-  // Initially kNone and changes as the statement is parsed.
-  Clause last_clause_;
-};  // class UntypedOnCallSpecBase
-
-// This template class implements an ON_CALL spec.
-template <typename F>
-class OnCallSpec : public UntypedOnCallSpecBase {
- public:
-  typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-  typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
-
-  // Constructs an OnCallSpec object from the information inside
-  // the parenthesis of an ON_CALL() statement.
-  OnCallSpec(const char* a_file, int a_line,
-             const ArgumentMatcherTuple& matchers)
-      : UntypedOnCallSpecBase(a_file, a_line),
-        matchers_(matchers),
-        // By default, extra_matcher_ should match anything.  However,
-        // we cannot initialize it with _ as that causes ambiguity between
-        // Matcher's copy and move constructor for some argument types.
-        extra_matcher_(A<const ArgumentTuple&>()) {}
-
-  // Implements the .With() clause.
-  OnCallSpec& With(const Matcher<const ArgumentTuple&>& m) {
-    // Makes sure this is called at most once.
-    ExpectSpecProperty(last_clause_ < kWith,
-                       ".With() cannot appear "
-                       "more than once in an ON_CALL().");
-    last_clause_ = kWith;
-
-    extra_matcher_ = m;
-    return *this;
-  }
-
-  // Implements the .WillByDefault() clause.
-  OnCallSpec& WillByDefault(const Action<F>& action) {
-    ExpectSpecProperty(last_clause_ < kWillByDefault,
-                       ".WillByDefault() must appear "
-                       "exactly once in an ON_CALL().");
-    last_clause_ = kWillByDefault;
-
-    ExpectSpecProperty(!action.IsDoDefault(),
-                       "DoDefault() cannot be used in ON_CALL().");
-    action_ = action;
-    return *this;
-  }
-
-  // Returns true if and only if the given arguments match the matchers.
-  bool Matches(const ArgumentTuple& args) const {
-    return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
-  }
-
-  // Returns the action specified by the user.
-  const Action<F>& GetAction() const {
-    AssertSpecProperty(last_clause_ == kWillByDefault,
-                       ".WillByDefault() must appear exactly "
-                       "once in an ON_CALL().");
-    return action_;
-  }
-
- private:
-  // The information in statement
-  //
-  //   ON_CALL(mock_object, Method(matchers))
-  //       .With(multi-argument-matcher)
-  //       .WillByDefault(action);
-  //
-  // is recorded in the data members like this:
-  //
-  //   source file that contains the statement => file_
-  //   line number of the statement            => line_
-  //   matchers                                => matchers_
-  //   multi-argument-matcher                  => extra_matcher_
-  //   action                                  => action_
-  ArgumentMatcherTuple matchers_;
-  Matcher<const ArgumentTuple&> extra_matcher_;
-  Action<F> action_;
-};  // class OnCallSpec
-
-// Possible reactions on uninteresting calls.
-enum CallReaction {
-  kAllow,
-  kWarn,
-  kFail,
-};
-
-}  // namespace internal
-
-// Utilities for manipulating mock objects.
-class GTEST_API_ Mock {
- public:
-  // The following public methods can be called concurrently.
-
-  // Tells Google Mock to ignore mock_obj when checking for leaked
-  // mock objects.
-  static void AllowLeak(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Verifies and clears all expectations on the given mock object.
-  // If the expectations aren't satisfied, generates one or more
-  // Google Test non-fatal failures and returns false.
-  static bool VerifyAndClearExpectations(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Verifies all expectations on the given mock object and clears its
-  // default actions and expectations.  Returns true if and only if the
-  // verification was successful.
-  static bool VerifyAndClear(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Returns whether the mock was created as a naggy mock (default)
-  static bool IsNaggy(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-  // Returns whether the mock was created as a nice mock
-  static bool IsNice(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-  // Returns whether the mock was created as a strict mock
-  static bool IsStrict(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
- private:
-  friend class internal::UntypedFunctionMockerBase;
-
-  // Needed for a function mocker to register itself (so that we know
-  // how to clear a mock object).
-  template <typename F>
-  friend class internal::FunctionMocker;
-
-  template <typename MockClass>
-  friend class internal::NiceMockImpl;
-  template <typename MockClass>
-  friend class internal::NaggyMockImpl;
-  template <typename MockClass>
-  friend class internal::StrictMockImpl;
-
-  // Tells Google Mock to allow uninteresting calls on the given mock
-  // object.
-  static void AllowUninterestingCalls(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock to warn the user about uninteresting calls on
-  // the given mock object.
-  static void WarnUninterestingCalls(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock to fail uninteresting calls on the given mock
-  // object.
-  static void FailUninterestingCalls(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock the given mock object is being destroyed and
-  // its entry in the call-reaction table should be removed.
-  static void UnregisterCallReaction(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Returns the reaction Google Mock will have on uninteresting calls
-  // made on the given mock object.
-  static internal::CallReaction GetReactionOnUninterestingCalls(
-      const void* mock_obj)
-          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Verifies that all expectations on the given mock object have been
-  // satisfied.  Reports one or more Google Test non-fatal failures
-  // and returns false if not.
-  static bool VerifyAndClearExpectationsLocked(void* mock_obj)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
-
-  // Clears all ON_CALL()s set on the given mock object.
-  static void ClearDefaultActionsLocked(void* mock_obj)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
-
-  // Registers a mock object and a mock method it owns.
-  static void Register(
-      const void* mock_obj,
-      internal::UntypedFunctionMockerBase* mocker)
-          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock where in the source code mock_obj is used in an
-  // ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
-  // information helps the user identify which object it is.
-  static void RegisterUseByOnCallOrExpectCall(
-      const void* mock_obj, const char* file, int line)
-          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Unregisters a mock method; removes the owning mock object from
-  // the registry when the last mock method associated with it has
-  // been unregistered.  This is called only in the destructor of
-  // FunctionMocker.
-  static void UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
-};  // class Mock
-
-// An abstract handle of an expectation.  Useful in the .After()
-// clause of EXPECT_CALL() for setting the (partial) order of
-// expectations.  The syntax:
-//
-//   Expectation e1 = EXPECT_CALL(...)...;
-//   EXPECT_CALL(...).After(e1)...;
-//
-// sets two expectations where the latter can only be matched after
-// the former has been satisfied.
-//
-// Notes:
-//   - This class is copyable and has value semantics.
-//   - Constness is shallow: a const Expectation object itself cannot
-//     be modified, but the mutable methods of the ExpectationBase
-//     object it references can be called via expectation_base().
-
-class GTEST_API_ Expectation {
- public:
-  // Constructs a null object that doesn't reference any expectation.
-  Expectation();
-  Expectation(Expectation&&) = default;
-  Expectation(const Expectation&) = default;
-  Expectation& operator=(Expectation&&) = default;
-  Expectation& operator=(const Expectation&) = default;
-  ~Expectation();
-
-  // This single-argument ctor must not be explicit, in order to support the
-  //   Expectation e = EXPECT_CALL(...);
-  // syntax.
-  //
-  // A TypedExpectation object stores its pre-requisites as
-  // Expectation objects, and needs to call the non-const Retire()
-  // method on the ExpectationBase objects they reference.  Therefore
-  // Expectation must receive a *non-const* reference to the
-  // ExpectationBase object.
-  Expectation(internal::ExpectationBase& exp);  // NOLINT
-
-  // The compiler-generated copy ctor and operator= work exactly as
-  // intended, so we don't need to define our own.
-
-  // Returns true if and only if rhs references the same expectation as this
-  // object does.
-  bool operator==(const Expectation& rhs) const {
-    return expectation_base_ == rhs.expectation_base_;
-  }
-
-  bool operator!=(const Expectation& rhs) const { return !(*this == rhs); }
-
- private:
-  friend class ExpectationSet;
-  friend class Sequence;
-  friend class ::testing::internal::ExpectationBase;
-  friend class ::testing::internal::UntypedFunctionMockerBase;
-
-  template <typename F>
-  friend class ::testing::internal::FunctionMocker;
-
-  template <typename F>
-  friend class ::testing::internal::TypedExpectation;
-
-  // This comparator is needed for putting Expectation objects into a set.
-  class Less {
-   public:
-    bool operator()(const Expectation& lhs, const Expectation& rhs) const {
-      return lhs.expectation_base_.get() < rhs.expectation_base_.get();
-    }
-  };
-
-  typedef ::std::set<Expectation, Less> Set;
-
-  Expectation(
-      const std::shared_ptr<internal::ExpectationBase>& expectation_base);
-
-  // Returns the expectation this object references.
-  const std::shared_ptr<internal::ExpectationBase>& expectation_base() const {
-    return expectation_base_;
-  }
-
-  // A shared_ptr that co-owns the expectation this handle references.
-  std::shared_ptr<internal::ExpectationBase> expectation_base_;
-};
-
-// A set of expectation handles.  Useful in the .After() clause of
-// EXPECT_CALL() for setting the (partial) order of expectations.  The
-// syntax:
-//
-//   ExpectationSet es;
-//   es += EXPECT_CALL(...)...;
-//   es += EXPECT_CALL(...)...;
-//   EXPECT_CALL(...).After(es)...;
-//
-// sets three expectations where the last one can only be matched
-// after the first two have both been satisfied.
-//
-// This class is copyable and has value semantics.
-class ExpectationSet {
- public:
-  // A bidirectional iterator that can read a const element in the set.
-  typedef Expectation::Set::const_iterator const_iterator;
-
-  // An object stored in the set.  This is an alias of Expectation.
-  typedef Expectation::Set::value_type value_type;
-
-  // Constructs an empty set.
-  ExpectationSet() {}
-
-  // This single-argument ctor must not be explicit, in order to support the
-  //   ExpectationSet es = EXPECT_CALL(...);
-  // syntax.
-  ExpectationSet(internal::ExpectationBase& exp) {  // NOLINT
-    *this += Expectation(exp);
-  }
-
-  // This single-argument ctor implements implicit conversion from
-  // Expectation and thus must not be explicit.  This allows either an
-  // Expectation or an ExpectationSet to be used in .After().
-  ExpectationSet(const Expectation& e) {  // NOLINT
-    *this += e;
-  }
-
-  // The compiler-generator ctor and operator= works exactly as
-  // intended, so we don't need to define our own.
-
-  // Returns true if and only if rhs contains the same set of Expectation
-  // objects as this does.
-  bool operator==(const ExpectationSet& rhs) const {
-    return expectations_ == rhs.expectations_;
-  }
-
-  bool operator!=(const ExpectationSet& rhs) const { return !(*this == rhs); }
-
-  // Implements the syntax
-  //   expectation_set += EXPECT_CALL(...);
-  ExpectationSet& operator+=(const Expectation& e) {
-    expectations_.insert(e);
-    return *this;
-  }
-
-  int size() const { return static_cast<int>(expectations_.size()); }
-
-  const_iterator begin() const { return expectations_.begin(); }
-  const_iterator end() const { return expectations_.end(); }
-
- private:
-  Expectation::Set expectations_;
-};
-
-
-// Sequence objects are used by a user to specify the relative order
-// in which the expectations should match.  They are copyable (we rely
-// on the compiler-defined copy constructor and assignment operator).
-class GTEST_API_ Sequence {
- public:
-  // Constructs an empty sequence.
-  Sequence() : last_expectation_(new Expectation) {}
-
-  // Adds an expectation to this sequence.  The caller must ensure
-  // that no other thread is accessing this Sequence object.
-  void AddExpectation(const Expectation& expectation) const;
-
- private:
-  // The last expectation in this sequence.
-  std::shared_ptr<Expectation> last_expectation_;
-};  // class Sequence
-
-// An object of this type causes all EXPECT_CALL() statements
-// encountered in its scope to be put in an anonymous sequence.  The
-// work is done in the constructor and destructor.  You should only
-// create an InSequence object on the stack.
-//
-// The sole purpose for this class is to support easy definition of
-// sequential expectations, e.g.
-//
-//   {
-//     InSequence dummy;  // The name of the object doesn't matter.
-//
-//     // The following expectations must match in the order they appear.
-//     EXPECT_CALL(a, Bar())...;
-//     EXPECT_CALL(a, Baz())...;
-//     ...
-//     EXPECT_CALL(b, Xyz())...;
-//   }
-//
-// You can create InSequence objects in multiple threads, as long as
-// they are used to affect different mock objects.  The idea is that
-// each thread can create and set up its own mocks as if it's the only
-// thread.  However, for clarity of your tests we recommend you to set
-// up mocks in the main thread unless you have a good reason not to do
-// so.
-class GTEST_API_ InSequence {
- public:
-  InSequence();
-  ~InSequence();
- private:
-  bool sequence_created_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(InSequence);  // NOLINT
-} GTEST_ATTRIBUTE_UNUSED_;
-
-namespace internal {
-
-// Points to the implicit sequence introduced by a living InSequence
-// object (if any) in the current thread or NULL.
-GTEST_API_ extern ThreadLocal<Sequence*> g_gmock_implicit_sequence;
-
-// Base class for implementing expectations.
-//
-// There are two reasons for having a type-agnostic base class for
-// Expectation:
-//
-//   1. We need to store collections of expectations of different
-//   types (e.g. all pre-requisites of a particular expectation, all
-//   expectations in a sequence).  Therefore these expectation objects
-//   must share a common base class.
-//
-//   2. We can avoid binary code bloat by moving methods not depending
-//   on the template argument of Expectation to the base class.
-//
-// This class is internal and mustn't be used by user code directly.
-class GTEST_API_ ExpectationBase {
- public:
-  // source_text is the EXPECT_CALL(...) source that created this Expectation.
-  ExpectationBase(const char* file, int line, const std::string& source_text);
-
-  virtual ~ExpectationBase();
-
-  // Where in the source file was the expectation spec defined?
-  const char* file() const { return file_; }
-  int line() const { return line_; }
-  const char* source_text() const { return source_text_.c_str(); }
-  // Returns the cardinality specified in the expectation spec.
-  const Cardinality& cardinality() const { return cardinality_; }
-
-  // Describes the source file location of this expectation.
-  void DescribeLocationTo(::std::ostream* os) const {
-    *os << FormatFileLocation(file(), line()) << " ";
-  }
-
-  // Describes how many times a function call matching this
-  // expectation has occurred.
-  void DescribeCallCountTo(::std::ostream* os) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // If this mock method has an extra matcher (i.e. .With(matcher)),
-  // describes it to the ostream.
-  virtual void MaybeDescribeExtraMatcherTo(::std::ostream* os) = 0;
-
- protected:
-  friend class ::testing::Expectation;
-  friend class UntypedFunctionMockerBase;
-
-  enum Clause {
-    // Don't change the order of the enum members!
-    kNone,
-    kWith,
-    kTimes,
-    kInSequence,
-    kAfter,
-    kWillOnce,
-    kWillRepeatedly,
-    kRetiresOnSaturation
-  };
-
-  typedef std::vector<const void*> UntypedActions;
-
-  // Returns an Expectation object that references and co-owns this
-  // expectation.
-  virtual Expectation GetHandle() = 0;
-
-  // Asserts that the EXPECT_CALL() statement has the given property.
-  void AssertSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Assert(property, file_, line_, failure_message);
-  }
-
-  // Expects that the EXPECT_CALL() statement has the given property.
-  void ExpectSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Expect(property, file_, line_, failure_message);
-  }
-
-  // Explicitly specifies the cardinality of this expectation.  Used
-  // by the subclasses to implement the .Times() clause.
-  void SpecifyCardinality(const Cardinality& cardinality);
-
-  // Returns true if and only if the user specified the cardinality
-  // explicitly using a .Times().
-  bool cardinality_specified() const { return cardinality_specified_; }
-
-  // Sets the cardinality of this expectation spec.
-  void set_cardinality(const Cardinality& a_cardinality) {
-    cardinality_ = a_cardinality;
-  }
-
-  // The following group of methods should only be called after the
-  // EXPECT_CALL() statement, and only when g_gmock_mutex is held by
-  // the current thread.
-
-  // Retires all pre-requisites of this expectation.
-  void RetireAllPreRequisites()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Returns true if and only if this expectation is retired.
-  bool is_retired() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return retired_;
-  }
-
-  // Retires this expectation.
-  void Retire()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    retired_ = true;
-  }
-
-  // Returns true if and only if this expectation is satisfied.
-  bool IsSatisfied() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return cardinality().IsSatisfiedByCallCount(call_count_);
-  }
-
-  // Returns true if and only if this expectation is saturated.
-  bool IsSaturated() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return cardinality().IsSaturatedByCallCount(call_count_);
-  }
-
-  // Returns true if and only if this expectation is over-saturated.
-  bool IsOverSaturated() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return cardinality().IsOverSaturatedByCallCount(call_count_);
-  }
-
-  // Returns true if and only if all pre-requisites of this expectation are
-  // satisfied.
-  bool AllPrerequisitesAreSatisfied() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Adds unsatisfied pre-requisites of this expectation to 'result'.
-  void FindUnsatisfiedPrerequisites(ExpectationSet* result) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Returns the number this expectation has been invoked.
-  int call_count() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return call_count_;
-  }
-
-  // Increments the number this expectation has been invoked.
-  void IncrementCallCount()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    call_count_++;
-  }
-
-  // Checks the action count (i.e. the number of WillOnce() and
-  // WillRepeatedly() clauses) against the cardinality if this hasn't
-  // been done before.  Prints a warning if there are too many or too
-  // few actions.
-  void CheckActionCountIfNotDone() const
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  friend class ::testing::Sequence;
-  friend class ::testing::internal::ExpectationTester;
-
-  template <typename Function>
-  friend class TypedExpectation;
-
-  // Implements the .Times() clause.
-  void UntypedTimes(const Cardinality& a_cardinality);
-
-  // This group of fields are part of the spec and won't change after
-  // an EXPECT_CALL() statement finishes.
-  const char* file_;          // The file that contains the expectation.
-  int line_;                  // The line number of the expectation.
-  const std::string source_text_;  // The EXPECT_CALL(...) source text.
-  // True if and only if the cardinality is specified explicitly.
-  bool cardinality_specified_;
-  Cardinality cardinality_;            // The cardinality of the expectation.
-  // The immediate pre-requisites (i.e. expectations that must be
-  // satisfied before this expectation can be matched) of this
-  // expectation.  We use std::shared_ptr in the set because we want an
-  // Expectation object to be co-owned by its FunctionMocker and its
-  // successors.  This allows multiple mock objects to be deleted at
-  // different times.
-  ExpectationSet immediate_prerequisites_;
-
-  // This group of fields are the current state of the expectation,
-  // and can change as the mock function is called.
-  int call_count_;  // How many times this expectation has been invoked.
-  bool retired_;    // True if and only if this expectation has retired.
-  UntypedActions untyped_actions_;
-  bool extra_matcher_specified_;
-  bool repeated_action_specified_;  // True if a WillRepeatedly() was specified.
-  bool retires_on_saturation_;
-  Clause last_clause_;
-  mutable bool action_count_checked_;  // Under mutex_.
-  mutable Mutex mutex_;  // Protects action_count_checked_.
-};  // class ExpectationBase
-
-// Impements an expectation for the given function type.
-template <typename F>
-class TypedExpectation : public ExpectationBase {
- public:
-  typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-  typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
-  typedef typename Function<F>::Result Result;
-
-  TypedExpectation(FunctionMocker<F>* owner, const char* a_file, int a_line,
-                   const std::string& a_source_text,
-                   const ArgumentMatcherTuple& m)
-      : ExpectationBase(a_file, a_line, a_source_text),
-        owner_(owner),
-        matchers_(m),
-        // By default, extra_matcher_ should match anything.  However,
-        // we cannot initialize it with _ as that causes ambiguity between
-        // Matcher's copy and move constructor for some argument types.
-        extra_matcher_(A<const ArgumentTuple&>()),
-        repeated_action_(DoDefault()) {}
-
-  ~TypedExpectation() override {
-    // Check the validity of the action count if it hasn't been done
-    // yet (for example, if the expectation was never used).
-    CheckActionCountIfNotDone();
-    for (UntypedActions::const_iterator it = untyped_actions_.begin();
-         it != untyped_actions_.end(); ++it) {
-      delete static_cast<const Action<F>*>(*it);
-    }
-  }
-
-  // Implements the .With() clause.
-  TypedExpectation& With(const Matcher<const ArgumentTuple&>& m) {
-    if (last_clause_ == kWith) {
-      ExpectSpecProperty(false,
-                         ".With() cannot appear "
-                         "more than once in an EXPECT_CALL().");
-    } else {
-      ExpectSpecProperty(last_clause_ < kWith,
-                         ".With() must be the first "
-                         "clause in an EXPECT_CALL().");
-    }
-    last_clause_ = kWith;
-
-    extra_matcher_ = m;
-    extra_matcher_specified_ = true;
-    return *this;
-  }
-
-  // Implements the .Times() clause.
-  TypedExpectation& Times(const Cardinality& a_cardinality) {
-    ExpectationBase::UntypedTimes(a_cardinality);
-    return *this;
-  }
-
-  // Implements the .Times() clause.
-  TypedExpectation& Times(int n) {
-    return Times(Exactly(n));
-  }
-
-  // Implements the .InSequence() clause.
-  TypedExpectation& InSequence(const Sequence& s) {
-    ExpectSpecProperty(last_clause_ <= kInSequence,
-                       ".InSequence() cannot appear after .After(),"
-                       " .WillOnce(), .WillRepeatedly(), or "
-                       ".RetiresOnSaturation().");
-    last_clause_ = kInSequence;
-
-    s.AddExpectation(GetHandle());
-    return *this;
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2) {
-    return InSequence(s1).InSequence(s2);
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
-                               const Sequence& s3) {
-    return InSequence(s1, s2).InSequence(s3);
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
-                               const Sequence& s3, const Sequence& s4) {
-    return InSequence(s1, s2, s3).InSequence(s4);
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
-                               const Sequence& s3, const Sequence& s4,
-                               const Sequence& s5) {
-    return InSequence(s1, s2, s3, s4).InSequence(s5);
-  }
-
-  // Implements that .After() clause.
-  TypedExpectation& After(const ExpectationSet& s) {
-    ExpectSpecProperty(last_clause_ <= kAfter,
-                       ".After() cannot appear after .WillOnce(),"
-                       " .WillRepeatedly(), or "
-                       ".RetiresOnSaturation().");
-    last_clause_ = kAfter;
-
-    for (ExpectationSet::const_iterator it = s.begin(); it != s.end(); ++it) {
-      immediate_prerequisites_ += *it;
-    }
-    return *this;
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2) {
-    return After(s1).After(s2);
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
-                          const ExpectationSet& s3) {
-    return After(s1, s2).After(s3);
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
-                          const ExpectationSet& s3, const ExpectationSet& s4) {
-    return After(s1, s2, s3).After(s4);
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
-                          const ExpectationSet& s3, const ExpectationSet& s4,
-                          const ExpectationSet& s5) {
-    return After(s1, s2, s3, s4).After(s5);
-  }
-
-  // Implements the .WillOnce() clause.
-  TypedExpectation& WillOnce(const Action<F>& action) {
-    ExpectSpecProperty(last_clause_ <= kWillOnce,
-                       ".WillOnce() cannot appear after "
-                       ".WillRepeatedly() or .RetiresOnSaturation().");
-    last_clause_ = kWillOnce;
-
-    untyped_actions_.push_back(new Action<F>(action));
-    if (!cardinality_specified()) {
-      set_cardinality(Exactly(static_cast<int>(untyped_actions_.size())));
-    }
-    return *this;
-  }
-
-  // Implements the .WillRepeatedly() clause.
-  TypedExpectation& WillRepeatedly(const Action<F>& action) {
-    if (last_clause_ == kWillRepeatedly) {
-      ExpectSpecProperty(false,
-                         ".WillRepeatedly() cannot appear "
-                         "more than once in an EXPECT_CALL().");
-    } else {
-      ExpectSpecProperty(last_clause_ < kWillRepeatedly,
-                         ".WillRepeatedly() cannot appear "
-                         "after .RetiresOnSaturation().");
-    }
-    last_clause_ = kWillRepeatedly;
-    repeated_action_specified_ = true;
-
-    repeated_action_ = action;
-    if (!cardinality_specified()) {
-      set_cardinality(AtLeast(static_cast<int>(untyped_actions_.size())));
-    }
-
-    // Now that no more action clauses can be specified, we check
-    // whether their count makes sense.
-    CheckActionCountIfNotDone();
-    return *this;
-  }
-
-  // Implements the .RetiresOnSaturation() clause.
-  TypedExpectation& RetiresOnSaturation() {
-    ExpectSpecProperty(last_clause_ < kRetiresOnSaturation,
-                       ".RetiresOnSaturation() cannot appear "
-                       "more than once.");
-    last_clause_ = kRetiresOnSaturation;
-    retires_on_saturation_ = true;
-
-    // Now that no more action clauses can be specified, we check
-    // whether their count makes sense.
-    CheckActionCountIfNotDone();
-    return *this;
-  }
-
-  // Returns the matchers for the arguments as specified inside the
-  // EXPECT_CALL() macro.
-  const ArgumentMatcherTuple& matchers() const {
-    return matchers_;
-  }
-
-  // Returns the matcher specified by the .With() clause.
-  const Matcher<const ArgumentTuple&>& extra_matcher() const {
-    return extra_matcher_;
-  }
-
-  // Returns the action specified by the .WillRepeatedly() clause.
-  const Action<F>& repeated_action() const { return repeated_action_; }
-
-  // If this mock method has an extra matcher (i.e. .With(matcher)),
-  // describes it to the ostream.
-  void MaybeDescribeExtraMatcherTo(::std::ostream* os) override {
-    if (extra_matcher_specified_) {
-      *os << "    Expected args: ";
-      extra_matcher_.DescribeTo(os);
-      *os << "\n";
-    }
-  }
-
- private:
-  template <typename Function>
-  friend class FunctionMocker;
-
-  // Returns an Expectation object that references and co-owns this
-  // expectation.
-  Expectation GetHandle() override { return owner_->GetHandleOf(this); }
-
-  // The following methods will be called only after the EXPECT_CALL()
-  // statement finishes and when the current thread holds
-  // g_gmock_mutex.
-
-  // Returns true if and only if this expectation matches the given arguments.
-  bool Matches(const ArgumentTuple& args) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
-  }
-
-  // Returns true if and only if this expectation should handle the given
-  // arguments.
-  bool ShouldHandleArguments(const ArgumentTuple& args) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-
-    // In case the action count wasn't checked when the expectation
-    // was defined (e.g. if this expectation has no WillRepeatedly()
-    // or RetiresOnSaturation() clause), we check it when the
-    // expectation is used for the first time.
-    CheckActionCountIfNotDone();
-    return !is_retired() && AllPrerequisitesAreSatisfied() && Matches(args);
-  }
-
-  // Describes the result of matching the arguments against this
-  // expectation to the given ostream.
-  void ExplainMatchResultTo(
-      const ArgumentTuple& args,
-      ::std::ostream* os) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-
-    if (is_retired()) {
-      *os << "         Expected: the expectation is active\n"
-          << "           Actual: it is retired\n";
-    } else if (!Matches(args)) {
-      if (!TupleMatches(matchers_, args)) {
-        ExplainMatchFailureTupleTo(matchers_, args, os);
-      }
-      StringMatchResultListener listener;
-      if (!extra_matcher_.MatchAndExplain(args, &listener)) {
-        *os << "    Expected args: ";
-        extra_matcher_.DescribeTo(os);
-        *os << "\n           Actual: don't match";
-
-        internal::PrintIfNotEmpty(listener.str(), os);
-        *os << "\n";
-      }
-    } else if (!AllPrerequisitesAreSatisfied()) {
-      *os << "         Expected: all pre-requisites are satisfied\n"
-          << "           Actual: the following immediate pre-requisites "
-          << "are not satisfied:\n";
-      ExpectationSet unsatisfied_prereqs;
-      FindUnsatisfiedPrerequisites(&unsatisfied_prereqs);
-      int i = 0;
-      for (ExpectationSet::const_iterator it = unsatisfied_prereqs.begin();
-           it != unsatisfied_prereqs.end(); ++it) {
-        it->expectation_base()->DescribeLocationTo(os);
-        *os << "pre-requisite #" << i++ << "\n";
-      }
-      *os << "                   (end of pre-requisites)\n";
-    } else {
-      // This line is here just for completeness' sake.  It will never
-      // be executed as currently the ExplainMatchResultTo() function
-      // is called only when the mock function call does NOT match the
-      // expectation.
-      *os << "The call matches the expectation.\n";
-    }
-  }
-
-  // Returns the action that should be taken for the current invocation.
-  const Action<F>& GetCurrentAction(const FunctionMocker<F>* mocker,
-                                    const ArgumentTuple& args) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    const int count = call_count();
-    Assert(count >= 1, __FILE__, __LINE__,
-           "call_count() is <= 0 when GetCurrentAction() is "
-           "called - this should never happen.");
-
-    const int action_count = static_cast<int>(untyped_actions_.size());
-    if (action_count > 0 && !repeated_action_specified_ &&
-        count > action_count) {
-      // If there is at least one WillOnce() and no WillRepeatedly(),
-      // we warn the user when the WillOnce() clauses ran out.
-      ::std::stringstream ss;
-      DescribeLocationTo(&ss);
-      ss << "Actions ran out in " << source_text() << "...\n"
-         << "Called " << count << " times, but only "
-         << action_count << " WillOnce()"
-         << (action_count == 1 ? " is" : "s are") << " specified - ";
-      mocker->DescribeDefaultActionTo(args, &ss);
-      Log(kWarning, ss.str(), 1);
-    }
-
-    return count <= action_count
-               ? *static_cast<const Action<F>*>(
-                     untyped_actions_[static_cast<size_t>(count - 1)])
-               : repeated_action();
-  }
-
-  // Given the arguments of a mock function call, if the call will
-  // over-saturate this expectation, returns the default action;
-  // otherwise, returns the next action in this expectation.  Also
-  // describes *what* happened to 'what', and explains *why* Google
-  // Mock does it to 'why'.  This method is not const as it calls
-  // IncrementCallCount().  A return value of NULL means the default
-  // action.
-  const Action<F>* GetActionForArguments(const FunctionMocker<F>* mocker,
-                                         const ArgumentTuple& args,
-                                         ::std::ostream* what,
-                                         ::std::ostream* why)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    if (IsSaturated()) {
-      // We have an excessive call.
-      IncrementCallCount();
-      *what << "Mock function called more times than expected - ";
-      mocker->DescribeDefaultActionTo(args, what);
-      DescribeCallCountTo(why);
-
-      return nullptr;
-    }
-
-    IncrementCallCount();
-    RetireAllPreRequisites();
-
-    if (retires_on_saturation_ && IsSaturated()) {
-      Retire();
-    }
-
-    // Must be done after IncrementCount()!
-    *what << "Mock function call matches " << source_text() <<"...\n";
-    return &(GetCurrentAction(mocker, args));
-  }
-
-  // All the fields below won't change once the EXPECT_CALL()
-  // statement finishes.
-  FunctionMocker<F>* const owner_;
-  ArgumentMatcherTuple matchers_;
-  Matcher<const ArgumentTuple&> extra_matcher_;
-  Action<F> repeated_action_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TypedExpectation);
-};  // class TypedExpectation
-
-// A MockSpec object is used by ON_CALL() or EXPECT_CALL() for
-// specifying the default behavior of, or expectation on, a mock
-// function.
-
-// Note: class MockSpec really belongs to the ::testing namespace.
-// However if we define it in ::testing, MSVC will complain when
-// classes in ::testing::internal declare it as a friend class
-// template.  To workaround this compiler bug, we define MockSpec in
-// ::testing::internal and import it into ::testing.
-
-// Logs a message including file and line number information.
-GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
-                                const char* file, int line,
-                                const std::string& message);
-
-template <typename F>
-class MockSpec {
- public:
-  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-  typedef typename internal::Function<F>::ArgumentMatcherTuple
-      ArgumentMatcherTuple;
-
-  // Constructs a MockSpec object, given the function mocker object
-  // that the spec is associated with.
-  MockSpec(internal::FunctionMocker<F>* function_mocker,
-           const ArgumentMatcherTuple& matchers)
-      : function_mocker_(function_mocker), matchers_(matchers) {}
-
-  // Adds a new default action spec to the function mocker and returns
-  // the newly created spec.
-  internal::OnCallSpec<F>& InternalDefaultActionSetAt(
-      const char* file, int line, const char* obj, const char* call) {
-    LogWithLocation(internal::kInfo, file, line,
-                    std::string("ON_CALL(") + obj + ", " + call + ") invoked");
-    return function_mocker_->AddNewOnCallSpec(file, line, matchers_);
-  }
-
-  // Adds a new expectation spec to the function mocker and returns
-  // the newly created spec.
-  internal::TypedExpectation<F>& InternalExpectedAt(
-      const char* file, int line, const char* obj, const char* call) {
-    const std::string source_text(std::string("EXPECT_CALL(") + obj + ", " +
-                                  call + ")");
-    LogWithLocation(internal::kInfo, file, line, source_text + " invoked");
-    return function_mocker_->AddNewExpectation(
-        file, line, source_text, matchers_);
-  }
-
-  // This operator overload is used to swallow the superfluous parameter list
-  // introduced by the ON/EXPECT_CALL macros. See the macro comments for more
-  // explanation.
-  MockSpec<F>& operator()(const internal::WithoutMatchers&, void* const) {
-    return *this;
-  }
-
- private:
-  template <typename Function>
-  friend class internal::FunctionMocker;
-
-  // The function mocker that owns this spec.
-  internal::FunctionMocker<F>* const function_mocker_;
-  // The argument matchers specified in the spec.
-  ArgumentMatcherTuple matchers_;
-};  // class MockSpec
-
-// Wrapper type for generically holding an ordinary value or lvalue reference.
-// If T is not a reference type, it must be copyable or movable.
-// ReferenceOrValueWrapper<T> is movable, and will also be copyable unless
-// T is a move-only value type (which means that it will always be copyable
-// if the current platform does not support move semantics).
-//
-// The primary template defines handling for values, but function header
-// comments describe the contract for the whole template (including
-// specializations).
-template <typename T>
-class ReferenceOrValueWrapper {
- public:
-  // Constructs a wrapper from the given value/reference.
-  explicit ReferenceOrValueWrapper(T value)
-      : value_(std::move(value)) {
-  }
-
-  // Unwraps and returns the underlying value/reference, exactly as
-  // originally passed. The behavior of calling this more than once on
-  // the same object is unspecified.
-  T Unwrap() { return std::move(value_); }
-
-  // Provides nondestructive access to the underlying value/reference.
-  // Always returns a const reference (more precisely,
-  // const std::add_lvalue_reference<T>::type). The behavior of calling this
-  // after calling Unwrap on the same object is unspecified.
-  const T& Peek() const {
-    return value_;
-  }
-
- private:
-  T value_;
-};
-
-// Specialization for lvalue reference types. See primary template
-// for documentation.
-template <typename T>
-class ReferenceOrValueWrapper<T&> {
- public:
-  // Workaround for debatable pass-by-reference lint warning (c-library-team
-  // policy precludes NOLINT in this context)
-  typedef T& reference;
-  explicit ReferenceOrValueWrapper(reference ref)
-      : value_ptr_(&ref) {}
-  T& Unwrap() { return *value_ptr_; }
-  const T& Peek() const { return *value_ptr_; }
-
- private:
-  T* value_ptr_;
-};
-
-// C++ treats the void type specially.  For example, you cannot define
-// a void-typed variable or pass a void value to a function.
-// ActionResultHolder<T> holds a value of type T, where T must be a
-// copyable type or void (T doesn't need to be default-constructable).
-// It hides the syntactic difference between void and other types, and
-// is used to unify the code for invoking both void-returning and
-// non-void-returning mock functions.
-
-// Untyped base class for ActionResultHolder<T>.
-class UntypedActionResultHolderBase {
- public:
-  virtual ~UntypedActionResultHolderBase() {}
-
-  // Prints the held value as an action's result to os.
-  virtual void PrintAsActionResult(::std::ostream* os) const = 0;
-};
-
-// This generic definition is used when T is not void.
-template <typename T>
-class ActionResultHolder : public UntypedActionResultHolderBase {
- public:
-  // Returns the held value. Must not be called more than once.
-  T Unwrap() {
-    return result_.Unwrap();
-  }
-
-  // Prints the held value as an action's result to os.
-  void PrintAsActionResult(::std::ostream* os) const override {
-    *os << "\n          Returns: ";
-    // T may be a reference type, so we don't use UniversalPrint().
-    UniversalPrinter<T>::Print(result_.Peek(), os);
-  }
-
-  // Performs the given mock function's default action and returns the
-  // result in a new-ed ActionResultHolder.
-  template <typename F>
-  static ActionResultHolder* PerformDefaultAction(
-      const FunctionMocker<F>* func_mocker,
-      typename Function<F>::ArgumentTuple&& args,
-      const std::string& call_description) {
-    return new ActionResultHolder(Wrapper(func_mocker->PerformDefaultAction(
-        std::move(args), call_description)));
-  }
-
-  // Performs the given action and returns the result in a new-ed
-  // ActionResultHolder.
-  template <typename F>
-  static ActionResultHolder* PerformAction(
-      const Action<F>& action, typename Function<F>::ArgumentTuple&& args) {
-    return new ActionResultHolder(
-        Wrapper(action.Perform(std::move(args))));
-  }
-
- private:
-  typedef ReferenceOrValueWrapper<T> Wrapper;
-
-  explicit ActionResultHolder(Wrapper result)
-      : result_(std::move(result)) {
-  }
-
-  Wrapper result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
-};
-
-// Specialization for T = void.
-template <>
-class ActionResultHolder<void> : public UntypedActionResultHolderBase {
- public:
-  void Unwrap() { }
-
-  void PrintAsActionResult(::std::ostream* /* os */) const override {}
-
-  // Performs the given mock function's default action and returns ownership
-  // of an empty ActionResultHolder*.
-  template <typename F>
-  static ActionResultHolder* PerformDefaultAction(
-      const FunctionMocker<F>* func_mocker,
-      typename Function<F>::ArgumentTuple&& args,
-      const std::string& call_description) {
-    func_mocker->PerformDefaultAction(std::move(args), call_description);
-    return new ActionResultHolder;
-  }
-
-  // Performs the given action and returns ownership of an empty
-  // ActionResultHolder*.
-  template <typename F>
-  static ActionResultHolder* PerformAction(
-      const Action<F>& action, typename Function<F>::ArgumentTuple&& args) {
-    action.Perform(std::move(args));
-    return new ActionResultHolder;
-  }
-
- private:
-  ActionResultHolder() {}
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
-};
-
-template <typename F>
-class FunctionMocker;
-
-template <typename R, typename... Args>
-class FunctionMocker<R(Args...)> final : public UntypedFunctionMockerBase {
-  using F = R(Args...);
-
- public:
-  using Result = R;
-  using ArgumentTuple = std::tuple<Args...>;
-  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
-
-  FunctionMocker() {}
-
-  // There is no generally useful and implementable semantics of
-  // copying a mock object, so copying a mock is usually a user error.
-  // Thus we disallow copying function mockers.  If the user really
-  // wants to copy a mock object, they should implement their own copy
-  // operation, for example:
-  //
-  //   class MockFoo : public Foo {
-  //    public:
-  //     // Defines a copy constructor explicitly.
-  //     MockFoo(const MockFoo& src) {}
-  //     ...
-  //   };
-  FunctionMocker(const FunctionMocker&) = delete;
-  FunctionMocker& operator=(const FunctionMocker&) = delete;
-
-  // The destructor verifies that all expectations on this mock
-  // function have been satisfied.  If not, it will report Google Test
-  // non-fatal failures for the violations.
-  ~FunctionMocker() override GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    MutexLock l(&g_gmock_mutex);
-    VerifyAndClearExpectationsLocked();
-    Mock::UnregisterLocked(this);
-    ClearDefaultActionsLocked();
-  }
-
-  // Returns the ON_CALL spec that matches this mock function with the
-  // given arguments; returns NULL if no matching ON_CALL is found.
-  // L = *
-  const OnCallSpec<F>* FindOnCallSpec(
-      const ArgumentTuple& args) const {
-    for (UntypedOnCallSpecs::const_reverse_iterator it
-             = untyped_on_call_specs_.rbegin();
-         it != untyped_on_call_specs_.rend(); ++it) {
-      const OnCallSpec<F>* spec = static_cast<const OnCallSpec<F>*>(*it);
-      if (spec->Matches(args))
-        return spec;
-    }
-
-    return nullptr;
-  }
-
-  // Performs the default action of this mock function on the given
-  // arguments and returns the result. Asserts (or throws if
-  // exceptions are enabled) with a helpful call descrption if there
-  // is no valid return value. This method doesn't depend on the
-  // mutable state of this object, and thus can be called concurrently
-  // without locking.
-  // L = *
-  Result PerformDefaultAction(ArgumentTuple&& args,
-                              const std::string& call_description) const {
-    const OnCallSpec<F>* const spec =
-        this->FindOnCallSpec(args);
-    if (spec != nullptr) {
-      return spec->GetAction().Perform(std::move(args));
-    }
-    const std::string message =
-        call_description +
-        "\n    The mock function has no default action "
-        "set, and its return type has no default value set.";
-#if GTEST_HAS_EXCEPTIONS
-    if (!DefaultValue<Result>::Exists()) {
-      throw std::runtime_error(message);
-    }
-#else
-    Assert(DefaultValue<Result>::Exists(), "", -1, message);
-#endif
-    return DefaultValue<Result>::Get();
-  }
-
-  // Performs the default action with the given arguments and returns
-  // the action's result.  The call description string will be used in
-  // the error message to describe the call in the case the default
-  // action fails.  The caller is responsible for deleting the result.
-  // L = *
-  UntypedActionResultHolderBase* UntypedPerformDefaultAction(
-      void* untyped_args,  // must point to an ArgumentTuple
-      const std::string& call_description) const override {
-    ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
-    return ResultHolder::PerformDefaultAction(this, std::move(*args),
-                                              call_description);
-  }
-
-  // Performs the given action with the given arguments and returns
-  // the action's result.  The caller is responsible for deleting the
-  // result.
-  // L = *
-  UntypedActionResultHolderBase* UntypedPerformAction(
-      const void* untyped_action, void* untyped_args) const override {
-    // Make a copy of the action before performing it, in case the
-    // action deletes the mock object (and thus deletes itself).
-    const Action<F> action = *static_cast<const Action<F>*>(untyped_action);
-    ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
-    return ResultHolder::PerformAction(action, std::move(*args));
-  }
-
-  // Implements UntypedFunctionMockerBase::ClearDefaultActionsLocked():
-  // clears the ON_CALL()s set on this mock function.
-  void ClearDefaultActionsLocked() override
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-
-    // Deleting our default actions may trigger other mock objects to be
-    // deleted, for example if an action contains a reference counted smart
-    // pointer to that mock object, and that is the last reference. So if we
-    // delete our actions within the context of the global mutex we may deadlock
-    // when this method is called again. Instead, make a copy of the set of
-    // actions to delete, clear our set within the mutex, and then delete the
-    // actions outside of the mutex.
-    UntypedOnCallSpecs specs_to_delete;
-    untyped_on_call_specs_.swap(specs_to_delete);
-
-    g_gmock_mutex.Unlock();
-    for (UntypedOnCallSpecs::const_iterator it =
-             specs_to_delete.begin();
-         it != specs_to_delete.end(); ++it) {
-      delete static_cast<const OnCallSpec<F>*>(*it);
-    }
-
-    // Lock the mutex again, since the caller expects it to be locked when we
-    // return.
-    g_gmock_mutex.Lock();
-  }
-
-  // Returns the result of invoking this mock function with the given
-  // arguments.  This function can be safely called from multiple
-  // threads concurrently.
-  Result Invoke(Args... args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    ArgumentTuple tuple(std::forward<Args>(args)...);
-    std::unique_ptr<ResultHolder> holder(DownCast_<ResultHolder*>(
-        this->UntypedInvokeWith(static_cast<void*>(&tuple))));
-    return holder->Unwrap();
-  }
-
-  MockSpec<F> With(Matcher<Args>... m) {
-    return MockSpec<F>(this, ::std::make_tuple(std::move(m)...));
-  }
-
- protected:
-  template <typename Function>
-  friend class MockSpec;
-
-  typedef ActionResultHolder<Result> ResultHolder;
-
-  // Adds and returns a default action spec for this mock function.
-  OnCallSpec<F>& AddNewOnCallSpec(
-      const char* file, int line,
-      const ArgumentMatcherTuple& m)
-          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
-    OnCallSpec<F>* const on_call_spec = new OnCallSpec<F>(file, line, m);
-    untyped_on_call_specs_.push_back(on_call_spec);
-    return *on_call_spec;
-  }
-
-  // Adds and returns an expectation spec for this mock function.
-  TypedExpectation<F>& AddNewExpectation(const char* file, int line,
-                                         const std::string& source_text,
-                                         const ArgumentMatcherTuple& m)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
-    TypedExpectation<F>* const expectation =
-        new TypedExpectation<F>(this, file, line, source_text, m);
-    const std::shared_ptr<ExpectationBase> untyped_expectation(expectation);
-    // See the definition of untyped_expectations_ for why access to
-    // it is unprotected here.
-    untyped_expectations_.push_back(untyped_expectation);
-
-    // Adds this expectation into the implicit sequence if there is one.
-    Sequence* const implicit_sequence = g_gmock_implicit_sequence.get();
-    if (implicit_sequence != nullptr) {
-      implicit_sequence->AddExpectation(Expectation(untyped_expectation));
-    }
-
-    return *expectation;
-  }
-
- private:
-  template <typename Func> friend class TypedExpectation;
-
-  // Some utilities needed for implementing UntypedInvokeWith().
-
-  // Describes what default action will be performed for the given
-  // arguments.
-  // L = *
-  void DescribeDefaultActionTo(const ArgumentTuple& args,
-                               ::std::ostream* os) const {
-    const OnCallSpec<F>* const spec = FindOnCallSpec(args);
-
-    if (spec == nullptr) {
-      *os << (std::is_void<Result>::value ? "returning directly.\n"
-                                          : "returning default value.\n");
-    } else {
-      *os << "taking default action specified at:\n"
-          << FormatFileLocation(spec->file(), spec->line()) << "\n";
-    }
-  }
-
-  // Writes a message that the call is uninteresting (i.e. neither
-  // explicitly expected nor explicitly unexpected) to the given
-  // ostream.
-  void UntypedDescribeUninterestingCall(const void* untyped_args,
-                                        ::std::ostream* os) const override
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    const ArgumentTuple& args =
-        *static_cast<const ArgumentTuple*>(untyped_args);
-    *os << "Uninteresting mock function call - ";
-    DescribeDefaultActionTo(args, os);
-    *os << "    Function call: " << Name();
-    UniversalPrint(args, os);
-  }
-
-  // Returns the expectation that matches the given function arguments
-  // (or NULL is there's no match); when a match is found,
-  // untyped_action is set to point to the action that should be
-  // performed (or NULL if the action is "do default"), and
-  // is_excessive is modified to indicate whether the call exceeds the
-  // expected number.
-  //
-  // Critical section: We must find the matching expectation and the
-  // corresponding action that needs to be taken in an ATOMIC
-  // transaction.  Otherwise another thread may call this mock
-  // method in the middle and mess up the state.
-  //
-  // However, performing the action has to be left out of the critical
-  // section.  The reason is that we have no control on what the
-  // action does (it can invoke an arbitrary user function or even a
-  // mock function) and excessive locking could cause a dead lock.
-  const ExpectationBase* UntypedFindMatchingExpectation(
-      const void* untyped_args, const void** untyped_action, bool* is_excessive,
-      ::std::ostream* what, ::std::ostream* why) override
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    const ArgumentTuple& args =
-        *static_cast<const ArgumentTuple*>(untyped_args);
-    MutexLock l(&g_gmock_mutex);
-    TypedExpectation<F>* exp = this->FindMatchingExpectationLocked(args);
-    if (exp == nullptr) {  // A match wasn't found.
-      this->FormatUnexpectedCallMessageLocked(args, what, why);
-      return nullptr;
-    }
-
-    // This line must be done before calling GetActionForArguments(),
-    // which will increment the call count for *exp and thus affect
-    // its saturation status.
-    *is_excessive = exp->IsSaturated();
-    const Action<F>* action = exp->GetActionForArguments(this, args, what, why);
-    if (action != nullptr && action->IsDoDefault())
-      action = nullptr;  // Normalize "do default" to NULL.
-    *untyped_action = action;
-    return exp;
-  }
-
-  // Prints the given function arguments to the ostream.
-  void UntypedPrintArgs(const void* untyped_args,
-                        ::std::ostream* os) const override {
-    const ArgumentTuple& args =
-        *static_cast<const ArgumentTuple*>(untyped_args);
-    UniversalPrint(args, os);
-  }
-
-  // Returns the expectation that matches the arguments, or NULL if no
-  // expectation matches them.
-  TypedExpectation<F>* FindMatchingExpectationLocked(
-      const ArgumentTuple& args) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    // See the definition of untyped_expectations_ for why access to
-    // it is unprotected here.
-    for (typename UntypedExpectations::const_reverse_iterator it =
-             untyped_expectations_.rbegin();
-         it != untyped_expectations_.rend(); ++it) {
-      TypedExpectation<F>* const exp =
-          static_cast<TypedExpectation<F>*>(it->get());
-      if (exp->ShouldHandleArguments(args)) {
-        return exp;
-      }
-    }
-    return nullptr;
-  }
-
-  // Returns a message that the arguments don't match any expectation.
-  void FormatUnexpectedCallMessageLocked(
-      const ArgumentTuple& args,
-      ::std::ostream* os,
-      ::std::ostream* why) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    *os << "\nUnexpected mock function call - ";
-    DescribeDefaultActionTo(args, os);
-    PrintTriedExpectationsLocked(args, why);
-  }
-
-  // Prints a list of expectations that have been tried against the
-  // current mock function call.
-  void PrintTriedExpectationsLocked(
-      const ArgumentTuple& args,
-      ::std::ostream* why) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    const size_t count = untyped_expectations_.size();
-    *why << "Google Mock tried the following " << count << " "
-         << (count == 1 ? "expectation, but it didn't match" :
-             "expectations, but none matched")
-         << ":\n";
-    for (size_t i = 0; i < count; i++) {
-      TypedExpectation<F>* const expectation =
-          static_cast<TypedExpectation<F>*>(untyped_expectations_[i].get());
-      *why << "\n";
-      expectation->DescribeLocationTo(why);
-      if (count > 1) {
-        *why << "tried expectation #" << i << ": ";
-      }
-      *why << expectation->source_text() << "...\n";
-      expectation->ExplainMatchResultTo(args, why);
-      expectation->DescribeCallCountTo(why);
-    }
-  }
-};  // class FunctionMocker
-
-// Reports an uninteresting call (whose description is in msg) in the
-// manner specified by 'reaction'.
-void ReportUninterestingCall(CallReaction reaction, const std::string& msg);
-
-}  // namespace internal
-
-namespace internal {
-
-template <typename F>
-class MockFunction;
-
-template <typename R, typename... Args>
-class MockFunction<R(Args...)> {
- public:
-  MockFunction(const MockFunction&) = delete;
-  MockFunction& operator=(const MockFunction&) = delete;
-
-  std::function<R(Args...)> AsStdFunction() {
-    return [this](Args... args) -> R {
-      return this->Call(std::forward<Args>(args)...);
-    };
-  }
-
-  // Implementation detail: the expansion of the MOCK_METHOD macro.
-  R Call(Args... args) {
-    mock_.SetOwnerAndName(this, "Call");
-    return mock_.Invoke(std::forward<Args>(args)...);
-  }
-
-  MockSpec<R(Args...)> gmock_Call(Matcher<Args>... m) {
-    mock_.RegisterOwner(this);
-    return mock_.With(std::move(m)...);
-  }
-
-  MockSpec<R(Args...)> gmock_Call(const WithoutMatchers&, R (*)(Args...)) {
-    return this->gmock_Call(::testing::A<Args>()...);
-  }
-
- protected:
-  MockFunction() = default;
-  ~MockFunction() = default;
-
- private:
-  FunctionMocker<R(Args...)> mock_;
-};
-
-/*
-The SignatureOf<F> struct is a meta-function returning function signature
-corresponding to the provided F argument.
-
-It makes use of MockFunction easier by allowing it to accept more F arguments
-than just function signatures.
-
-Specializations provided here cover only a signature type itself and
-std::function. However, if need be it can be easily extended to cover also other
-types (like for example boost::function).
-*/
-
-template <typename F>
-struct SignatureOf;
-
-template <typename R, typename... Args>
-struct SignatureOf<R(Args...)> {
-  using type = R(Args...);
-};
-
-template <typename F>
-struct SignatureOf<std::function<F>> : SignatureOf<F> {};
-
-template <typename F>
-using SignatureOfT = typename SignatureOf<F>::type;
-
-}  // namespace internal
-
-// A MockFunction<F> type has one mock method whose type is
-// internal::SignatureOfT<F>.  It is useful when you just want your
-// test code to emit some messages and have Google Mock verify the
-// right messages are sent (and perhaps at the right times).  For
-// example, if you are exercising code:
-//
-//   Foo(1);
-//   Foo(2);
-//   Foo(3);
-//
-// and want to verify that Foo(1) and Foo(3) both invoke
-// mock.Bar("a"), but Foo(2) doesn't invoke anything, you can write:
-//
-// TEST(FooTest, InvokesBarCorrectly) {
-//   MyMock mock;
-//   MockFunction<void(string check_point_name)> check;
-//   {
-//     InSequence s;
-//
-//     EXPECT_CALL(mock, Bar("a"));
-//     EXPECT_CALL(check, Call("1"));
-//     EXPECT_CALL(check, Call("2"));
-//     EXPECT_CALL(mock, Bar("a"));
-//   }
-//   Foo(1);
-//   check.Call("1");
-//   Foo(2);
-//   check.Call("2");
-//   Foo(3);
-// }
-//
-// The expectation spec says that the first Bar("a") must happen
-// before check point "1", the second Bar("a") must happen after check
-// point "2", and nothing should happen between the two check
-// points. The explicit check points make it easy to tell which
-// Bar("a") is called by which call to Foo().
-//
-// MockFunction<F> can also be used to exercise code that accepts
-// std::function<internal::SignatureOfT<F>> callbacks. To do so, use
-// AsStdFunction() method to create std::function proxy forwarding to
-// original object's Call. Example:
-//
-// TEST(FooTest, RunsCallbackWithBarArgument) {
-//   MockFunction<int(string)> callback;
-//   EXPECT_CALL(callback, Call("bar")).WillOnce(Return(1));
-//   Foo(callback.AsStdFunction());
-// }
-//
-// The internal::SignatureOfT<F> indirection allows to use other types
-// than just function signature type. This is typically useful when
-// providing a mock for a predefined std::function type. Example:
-//
-// using FilterPredicate = std::function<bool(string)>;
-// void MyFilterAlgorithm(FilterPredicate predicate);
-//
-// TEST(FooTest, FilterPredicateAlwaysAccepts) {
-//   MockFunction<FilterPredicate> predicateMock;
-//   EXPECT_CALL(predicateMock, Call(_)).WillRepeatedly(Return(true));
-//   MyFilterAlgorithm(predicateMock.AsStdFunction());
-// }
-template <typename F>
-class MockFunction : public internal::MockFunction<internal::SignatureOfT<F>> {
-  using Base = internal::MockFunction<internal::SignatureOfT<F>>;
-
- public:
-  using Base::Base;
-};
-
-// The style guide prohibits "using" statements in a namespace scope
-// inside a header file.  However, the MockSpec class template is
-// meant to be defined in the ::testing namespace.  The following line
-// is just a trick for working around a bug in MSVC 8.0, which cannot
-// handle it if we define MockSpec in ::testing.
-using internal::MockSpec;
-
-// Const(x) is a convenient function for obtaining a const reference
-// to x.  This is useful for setting expectations on an overloaded
-// const mock method, e.g.
-//
-//   class MockFoo : public FooInterface {
-//    public:
-//     MOCK_METHOD0(Bar, int());
-//     MOCK_CONST_METHOD0(Bar, int&());
-//   };
-//
-//   MockFoo foo;
-//   // Expects a call to non-const MockFoo::Bar().
-//   EXPECT_CALL(foo, Bar());
-//   // Expects a call to const MockFoo::Bar().
-//   EXPECT_CALL(Const(foo), Bar());
-template <typename T>
-inline const T& Const(const T& x) { return x; }
-
-// Constructs an Expectation object that references and co-owns exp.
-inline Expectation::Expectation(internal::ExpectationBase& exp)  // NOLINT
-    : expectation_base_(exp.GetHandle().expectation_base()) {}
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Implementation for ON_CALL and EXPECT_CALL macros. A separate macro is
-// required to avoid compile errors when the name of the method used in call is
-// a result of macro expansion. See CompilesWithMethodNameExpandedFromMacro
-// tests in internal/gmock-spec-builders_test.cc for more details.
-//
-// This macro supports statements both with and without parameter matchers. If
-// the parameter list is omitted, gMock will accept any parameters, which allows
-// tests to be written that don't need to encode the number of method
-// parameter. This technique may only be used for non-overloaded methods.
-//
-//   // These are the same:
-//   ON_CALL(mock, NoArgsMethod()).WillByDefault(...);
-//   ON_CALL(mock, NoArgsMethod).WillByDefault(...);
-//
-//   // As are these:
-//   ON_CALL(mock, TwoArgsMethod(_, _)).WillByDefault(...);
-//   ON_CALL(mock, TwoArgsMethod).WillByDefault(...);
-//
-//   // Can also specify args if you want, of course:
-//   ON_CALL(mock, TwoArgsMethod(_, 45)).WillByDefault(...);
-//
-//   // Overloads work as long as you specify parameters:
-//   ON_CALL(mock, OverloadedMethod(_)).WillByDefault(...);
-//   ON_CALL(mock, OverloadedMethod(_, _)).WillByDefault(...);
-//
-//   // Oops! Which overload did you want?
-//   ON_CALL(mock, OverloadedMethod).WillByDefault(...);
-//     => ERROR: call to member function 'gmock_OverloadedMethod' is ambiguous
-//
-// How this works: The mock class uses two overloads of the gmock_Method
-// expectation setter method plus an operator() overload on the MockSpec object.
-// In the matcher list form, the macro expands to:
-//
-//   // This statement:
-//   ON_CALL(mock, TwoArgsMethod(_, 45))...
-//
-//   // ...expands to:
-//   mock.gmock_TwoArgsMethod(_, 45)(WithoutMatchers(), nullptr)...
-//   |-------------v---------------||------------v-------------|
-//       invokes first overload        swallowed by operator()
-//
-//   // ...which is essentially:
-//   mock.gmock_TwoArgsMethod(_, 45)...
-//
-// Whereas the form without a matcher list:
-//
-//   // This statement:
-//   ON_CALL(mock, TwoArgsMethod)...
-//
-//   // ...expands to:
-//   mock.gmock_TwoArgsMethod(WithoutMatchers(), nullptr)...
-//   |-----------------------v--------------------------|
-//                 invokes second overload
-//
-//   // ...which is essentially:
-//   mock.gmock_TwoArgsMethod(_, _)...
-//
-// The WithoutMatchers() argument is used to disambiguate overloads and to
-// block the caller from accidentally invoking the second overload directly. The
-// second argument is an internal type derived from the method signature. The
-// failure to disambiguate two overloads of this method in the ON_CALL statement
-// is how we block callers from setting expectations on overloaded methods.
-#define GMOCK_ON_CALL_IMPL_(mock_expr, Setter, call)                    \
-  ((mock_expr).gmock_##call)(::testing::internal::GetWithoutMatchers(), \
-                             nullptr)                                   \
-      .Setter(__FILE__, __LINE__, #mock_expr, #call)
-
-#define ON_CALL(obj, call) \
-  GMOCK_ON_CALL_IMPL_(obj, InternalDefaultActionSetAt, call)
-
-#define EXPECT_CALL(obj, call) \
-  GMOCK_ON_CALL_IMPL_(obj, InternalExpectedAt, call)
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/gmock.h b/third_party/googletest/googlemock/include/gmock/gmock.h
deleted file mode 100644
index 12469bc..0000000
--- a/third_party/googletest/googlemock/include/gmock/gmock.h
+++ /dev/null
@@ -1,98 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This is the main header file a user should include.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
-
-// This file implements the following syntax:
-//
-//   ON_CALL(mock_object, Method(...))
-//     .With(...) ?
-//     .WillByDefault(...);
-//
-// where With() is optional and WillByDefault() must appear exactly
-// once.
-//
-//   EXPECT_CALL(mock_object, Method(...))
-//     .With(...) ?
-//     .Times(...) ?
-//     .InSequence(...) *
-//     .WillOnce(...) *
-//     .WillRepeatedly(...) ?
-//     .RetiresOnSaturation() ? ;
-//
-// where all clauses are optional and WillOnce() can be repeated.
-
-#include "gmock/gmock-actions.h"
-#include "gmock/gmock-cardinalities.h"
-#include "gmock/gmock-function-mocker.h"
-#include "gmock/gmock-matchers.h"
-#include "gmock/gmock-more-actions.h"
-#include "gmock/gmock-more-matchers.h"
-#include "gmock/gmock-nice-strict.h"
-#include "gmock/internal/gmock-internal-utils.h"
-
-namespace testing {
-
-// Declares Google Mock flags that we want a user to use programmatically.
-GMOCK_DECLARE_bool_(catch_leaked_mocks);
-GMOCK_DECLARE_string_(verbose);
-GMOCK_DECLARE_int32_(default_mock_behavior);
-
-// Initializes Google Mock.  This must be called before running the
-// tests.  In particular, it parses the command line for the flags
-// that Google Mock recognizes.  Whenever a Google Mock flag is seen,
-// it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Mock flag variables are
-// updated.
-//
-// Since Google Test is needed for Google Mock to work, this function
-// also initializes Google Test and parses its flags, if that hasn't
-// been done.
-GTEST_API_ void InitGoogleMock(int* argc, char** argv);
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv);
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleMock();
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
diff --git a/third_party/googletest/googlemock/include/gmock/internal/custom/README.md b/third_party/googletest/googlemock/include/gmock/internal/custom/README.md
deleted file mode 100644
index f6c93f6..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/custom/README.md
+++ /dev/null
@@ -1,16 +0,0 @@
-# Customization Points
-
-The custom directory is an injection point for custom user configurations.
-
-## Header `gmock-port.h`
-
-The following macros can be defined:
-
-### Flag related macros:
-
-*   `GMOCK_DECLARE_bool_(name)`
-*   `GMOCK_DECLARE_int32_(name)`
-*   `GMOCK_DECLARE_string_(name)`
-*   `GMOCK_DEFINE_bool_(name, default_val, doc)`
-*   `GMOCK_DEFINE_int32_(name, default_val, doc)`
-*   `GMOCK_DEFINE_string_(name, default_val, doc)`
diff --git a/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-generated-actions.h b/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-generated-actions.h
deleted file mode 100644
index 63f8999..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-generated-actions.h
+++ /dev/null
@@ -1,6 +0,0 @@
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-matchers.h b/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-matchers.h
deleted file mode 100644
index 6384294..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-matchers.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-port.h b/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-port.h
deleted file mode 100644
index 1437869..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/custom/gmock-port.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
diff --git a/third_party/googletest/googlemock/include/gmock/internal/gmock-internal-utils.h b/third_party/googletest/googlemock/include/gmock/internal/gmock-internal-utils.h
deleted file mode 100644
index 317544a..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/gmock-internal-utils.h
+++ /dev/null
@@ -1,459 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file defines some utilities useful for implementing Google
-// Mock.  They are subject to change without notice, so please DO NOT
-// USE THEM IN USER CODE.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
-
-#include <stdio.h>
-#include <ostream>  // NOLINT
-#include <string>
-#include <type_traits>
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-
-template <typename>
-class Matcher;
-
-namespace internal {
-
-// Silence MSVC C4100 (unreferenced formal parameter) and
-// C4805('==': unsafe mix of type 'const int' and type 'const bool')
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-# pragma warning(disable:4805)
-#endif
-
-// Joins a vector of strings as if they are fields of a tuple; returns
-// the joined string.
-GTEST_API_ std::string JoinAsTuple(const Strings& fields);
-
-// Converts an identifier name to a space-separated list of lower-case
-// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
-// treated as one word.  For example, both "FooBar123" and
-// "foo_bar_123" are converted to "foo bar 123".
-GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name);
-
-// GetRawPointer(p) returns the raw pointer underlying p when p is a
-// smart pointer, or returns p itself when p is already a raw pointer.
-// The following default implementation is for the smart pointer case.
-template <typename Pointer>
-inline const typename Pointer::element_type* GetRawPointer(const Pointer& p) {
-  return p.get();
-}
-// This overloaded version is for the raw pointer case.
-template <typename Element>
-inline Element* GetRawPointer(Element* p) { return p; }
-
-// MSVC treats wchar_t as a native type usually, but treats it as the
-// same as unsigned short when the compiler option /Zc:wchar_t- is
-// specified.  It defines _NATIVE_WCHAR_T_DEFINED symbol when wchar_t
-// is a native type.
-#if defined(_MSC_VER) && !defined(_NATIVE_WCHAR_T_DEFINED)
-// wchar_t is a typedef.
-#else
-# define GMOCK_WCHAR_T_IS_NATIVE_ 1
-#endif
-
-// In what follows, we use the term "kind" to indicate whether a type
-// is bool, an integer type (excluding bool), a floating-point type,
-// or none of them.  This categorization is useful for determining
-// when a matcher argument type can be safely converted to another
-// type in the implementation of SafeMatcherCast.
-enum TypeKind {
-  kBool, kInteger, kFloatingPoint, kOther
-};
-
-// KindOf<T>::value is the kind of type T.
-template <typename T> struct KindOf {
-  enum { value = kOther };  // The default kind.
-};
-
-// This macro declares that the kind of 'type' is 'kind'.
-#define GMOCK_DECLARE_KIND_(type, kind) \
-  template <> struct KindOf<type> { enum { value = kind }; }
-
-GMOCK_DECLARE_KIND_(bool, kBool);
-
-// All standard integer types.
-GMOCK_DECLARE_KIND_(char, kInteger);
-GMOCK_DECLARE_KIND_(signed char, kInteger);
-GMOCK_DECLARE_KIND_(unsigned char, kInteger);
-GMOCK_DECLARE_KIND_(short, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(unsigned short, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(int, kInteger);
-GMOCK_DECLARE_KIND_(unsigned int, kInteger);
-GMOCK_DECLARE_KIND_(long, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(unsigned long, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(long long, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(unsigned long long, kInteger);  // NOLINT
-
-#if GMOCK_WCHAR_T_IS_NATIVE_
-GMOCK_DECLARE_KIND_(wchar_t, kInteger);
-#endif
-
-// All standard floating-point types.
-GMOCK_DECLARE_KIND_(float, kFloatingPoint);
-GMOCK_DECLARE_KIND_(double, kFloatingPoint);
-GMOCK_DECLARE_KIND_(long double, kFloatingPoint);
-
-#undef GMOCK_DECLARE_KIND_
-
-// Evaluates to the kind of 'type'.
-#define GMOCK_KIND_OF_(type) \
-  static_cast< ::testing::internal::TypeKind>( \
-      ::testing::internal::KindOf<type>::value)
-
-// LosslessArithmeticConvertibleImpl<kFromKind, From, kToKind, To>::value
-// is true if and only if arithmetic type From can be losslessly converted to
-// arithmetic type To.
-//
-// It's the user's responsibility to ensure that both From and To are
-// raw (i.e. has no CV modifier, is not a pointer, and is not a
-// reference) built-in arithmetic types, kFromKind is the kind of
-// From, and kToKind is the kind of To; the value is
-// implementation-defined when the above pre-condition is violated.
-template <TypeKind kFromKind, typename From, TypeKind kToKind, typename To>
-using LosslessArithmeticConvertibleImpl = std::integral_constant<
-    bool,
-    // clang-format off
-      // Converting from bool is always lossless
-      (kFromKind == kBool) ? true
-      // Converting between any other type kinds will be lossy if the type
-      // kinds are not the same.
-    : (kFromKind != kToKind) ? false
-    : (kFromKind == kInteger &&
-       // Converting between integers of different widths is allowed so long
-       // as the conversion does not go from signed to unsigned.
-      (((sizeof(From) < sizeof(To)) &&
-        !(std::is_signed<From>::value && !std::is_signed<To>::value)) ||
-       // Converting between integers of the same width only requires the
-       // two types to have the same signedness.
-       ((sizeof(From) == sizeof(To)) &&
-        (std::is_signed<From>::value == std::is_signed<To>::value)))
-       ) ? true
-      // Floating point conversions are lossless if and only if `To` is at least
-      // as wide as `From`.
-    : (kFromKind == kFloatingPoint && (sizeof(From) <= sizeof(To))) ? true
-    : false
-    // clang-format on
-    >;
-
-// LosslessArithmeticConvertible<From, To>::value is true if and only if
-// arithmetic type From can be losslessly converted to arithmetic type To.
-//
-// It's the user's responsibility to ensure that both From and To are
-// raw (i.e. has no CV modifier, is not a pointer, and is not a
-// reference) built-in arithmetic types; the value is
-// implementation-defined when the above pre-condition is violated.
-template <typename From, typename To>
-using LosslessArithmeticConvertible =
-    LosslessArithmeticConvertibleImpl<GMOCK_KIND_OF_(From), From,
-                                      GMOCK_KIND_OF_(To), To>;
-
-// This interface knows how to report a Google Mock failure (either
-// non-fatal or fatal).
-class FailureReporterInterface {
- public:
-  // The type of a failure (either non-fatal or fatal).
-  enum FailureType {
-    kNonfatal, kFatal
-  };
-
-  virtual ~FailureReporterInterface() {}
-
-  // Reports a failure that occurred at the given source file location.
-  virtual void ReportFailure(FailureType type, const char* file, int line,
-                             const std::string& message) = 0;
-};
-
-// Returns the failure reporter used by Google Mock.
-GTEST_API_ FailureReporterInterface* GetFailureReporter();
-
-// Asserts that condition is true; aborts the process with the given
-// message if condition is false.  We cannot use LOG(FATAL) or CHECK()
-// as Google Mock might be used to mock the log sink itself.  We
-// inline this function to prevent it from showing up in the stack
-// trace.
-inline void Assert(bool condition, const char* file, int line,
-                   const std::string& msg) {
-  if (!condition) {
-    GetFailureReporter()->ReportFailure(FailureReporterInterface::kFatal,
-                                        file, line, msg);
-  }
-}
-inline void Assert(bool condition, const char* file, int line) {
-  Assert(condition, file, line, "Assertion failed.");
-}
-
-// Verifies that condition is true; generates a non-fatal failure if
-// condition is false.
-inline void Expect(bool condition, const char* file, int line,
-                   const std::string& msg) {
-  if (!condition) {
-    GetFailureReporter()->ReportFailure(FailureReporterInterface::kNonfatal,
-                                        file, line, msg);
-  }
-}
-inline void Expect(bool condition, const char* file, int line) {
-  Expect(condition, file, line, "Expectation failed.");
-}
-
-// Severity level of a log.
-enum LogSeverity {
-  kInfo = 0,
-  kWarning = 1
-};
-
-// Valid values for the --gmock_verbose flag.
-
-// All logs (informational and warnings) are printed.
-const char kInfoVerbosity[] = "info";
-// Only warnings are printed.
-const char kWarningVerbosity[] = "warning";
-// No logs are printed.
-const char kErrorVerbosity[] = "error";
-
-// Returns true if and only if a log with the given severity is visible
-// according to the --gmock_verbose flag.
-GTEST_API_ bool LogIsVisible(LogSeverity severity);
-
-// Prints the given message to stdout if and only if 'severity' >= the level
-// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
-// 0, also prints the stack trace excluding the top
-// stack_frames_to_skip frames.  In opt mode, any positive
-// stack_frames_to_skip is treated as 0, since we don't know which
-// function calls will be inlined by the compiler and need to be
-// conservative.
-GTEST_API_ void Log(LogSeverity severity, const std::string& message,
-                    int stack_frames_to_skip);
-
-// A marker class that is used to resolve parameterless expectations to the
-// correct overload. This must not be instantiable, to prevent client code from
-// accidentally resolving to the overload; for example:
-//
-//    ON_CALL(mock, Method({}, nullptr))...
-//
-class WithoutMatchers {
- private:
-  WithoutMatchers() {}
-  friend GTEST_API_ WithoutMatchers GetWithoutMatchers();
-};
-
-// Internal use only: access the singleton instance of WithoutMatchers.
-GTEST_API_ WithoutMatchers GetWithoutMatchers();
-
-// Disable MSVC warnings for infinite recursion, since in this case the
-// the recursion is unreachable.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4717)
-#endif
-
-// Invalid<T>() is usable as an expression of type T, but will terminate
-// the program with an assertion failure if actually run.  This is useful
-// when a value of type T is needed for compilation, but the statement
-// will not really be executed (or we don't care if the statement
-// crashes).
-template <typename T>
-inline T Invalid() {
-  Assert(false, "", -1, "Internal error: attempt to return invalid value");
-  // This statement is unreachable, and would never terminate even if it
-  // could be reached. It is provided only to placate compiler warnings
-  // about missing return statements.
-  return Invalid<T>();
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-// Given a raw type (i.e. having no top-level reference or const
-// modifier) RawContainer that's either an STL-style container or a
-// native array, class StlContainerView<RawContainer> has the
-// following members:
-//
-//   - type is a type that provides an STL-style container view to
-//     (i.e. implements the STL container concept for) RawContainer;
-//   - const_reference is a type that provides a reference to a const
-//     RawContainer;
-//   - ConstReference(raw_container) returns a const reference to an STL-style
-//     container view to raw_container, which is a RawContainer.
-//   - Copy(raw_container) returns an STL-style container view of a
-//     copy of raw_container, which is a RawContainer.
-//
-// This generic version is used when RawContainer itself is already an
-// STL-style container.
-template <class RawContainer>
-class StlContainerView {
- public:
-  typedef RawContainer type;
-  typedef const type& const_reference;
-
-  static const_reference ConstReference(const RawContainer& container) {
-    static_assert(!std::is_const<RawContainer>::value,
-                  "RawContainer type must not be const");
-    return container;
-  }
-  static type Copy(const RawContainer& container) { return container; }
-};
-
-// This specialization is used when RawContainer is a native array type.
-template <typename Element, size_t N>
-class StlContainerView<Element[N]> {
- public:
-  typedef typename std::remove_const<Element>::type RawElement;
-  typedef internal::NativeArray<RawElement> type;
-  // NativeArray<T> can represent a native array either by value or by
-  // reference (selected by a constructor argument), so 'const type'
-  // can be used to reference a const native array.  We cannot
-  // 'typedef const type& const_reference' here, as that would mean
-  // ConstReference() has to return a reference to a local variable.
-  typedef const type const_reference;
-
-  static const_reference ConstReference(const Element (&array)[N]) {
-    static_assert(std::is_same<Element, RawElement>::value,
-                  "Element type must not be const");
-    return type(array, N, RelationToSourceReference());
-  }
-  static type Copy(const Element (&array)[N]) {
-    return type(array, N, RelationToSourceCopy());
-  }
-};
-
-// This specialization is used when RawContainer is a native array
-// represented as a (pointer, size) tuple.
-template <typename ElementPointer, typename Size>
-class StlContainerView< ::std::tuple<ElementPointer, Size> > {
- public:
-  typedef typename std::remove_const<
-      typename std::pointer_traits<ElementPointer>::element_type>::type
-      RawElement;
-  typedef internal::NativeArray<RawElement> type;
-  typedef const type const_reference;
-
-  static const_reference ConstReference(
-      const ::std::tuple<ElementPointer, Size>& array) {
-    return type(std::get<0>(array), std::get<1>(array),
-                RelationToSourceReference());
-  }
-  static type Copy(const ::std::tuple<ElementPointer, Size>& array) {
-    return type(std::get<0>(array), std::get<1>(array), RelationToSourceCopy());
-  }
-};
-
-// The following specialization prevents the user from instantiating
-// StlContainer with a reference type.
-template <typename T> class StlContainerView<T&>;
-
-// A type transform to remove constness from the first part of a pair.
-// Pairs like that are used as the value_type of associative containers,
-// and this transform produces a similar but assignable pair.
-template <typename T>
-struct RemoveConstFromKey {
-  typedef T type;
-};
-
-// Partially specialized to remove constness from std::pair<const K, V>.
-template <typename K, typename V>
-struct RemoveConstFromKey<std::pair<const K, V> > {
-  typedef std::pair<K, V> type;
-};
-
-// Emit an assertion failure due to incorrect DoDefault() usage. Out-of-lined to
-// reduce code size.
-GTEST_API_ void IllegalDoDefault(const char* file, int line);
-
-template <typename F, typename Tuple, size_t... Idx>
-auto ApplyImpl(F&& f, Tuple&& args, IndexSequence<Idx...>) -> decltype(
-    std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...)) {
-  return std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...);
-}
-
-// Apply the function to a tuple of arguments.
-template <typename F, typename Tuple>
-auto Apply(F&& f, Tuple&& args) -> decltype(
-    ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args),
-              MakeIndexSequence<std::tuple_size<
-                  typename std::remove_reference<Tuple>::type>::value>())) {
-  return ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args),
-                   MakeIndexSequence<std::tuple_size<
-                       typename std::remove_reference<Tuple>::type>::value>());
-}
-
-// Template struct Function<F>, where F must be a function type, contains
-// the following typedefs:
-//
-//   Result:               the function's return type.
-//   Arg<N>:               the type of the N-th argument, where N starts with 0.
-//   ArgumentTuple:        the tuple type consisting of all parameters of F.
-//   ArgumentMatcherTuple: the tuple type consisting of Matchers for all
-//                         parameters of F.
-//   MakeResultVoid:       the function type obtained by substituting void
-//                         for the return type of F.
-//   MakeResultIgnoredValue:
-//                         the function type obtained by substituting Something
-//                         for the return type of F.
-template <typename T>
-struct Function;
-
-template <typename R, typename... Args>
-struct Function<R(Args...)> {
-  using Result = R;
-  static constexpr size_t ArgumentCount = sizeof...(Args);
-  template <size_t I>
-  using Arg = ElemFromList<I, Args...>;
-  using ArgumentTuple = std::tuple<Args...>;
-  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
-  using MakeResultVoid = void(Args...);
-  using MakeResultIgnoredValue = IgnoredValue(Args...);
-};
-
-template <typename R, typename... Args>
-constexpr size_t Function<R(Args...)>::ArgumentCount;
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
diff --git a/third_party/googletest/googlemock/include/gmock/internal/gmock-port.h b/third_party/googletest/googlemock/include/gmock/internal/gmock-port.h
deleted file mode 100644
index 367a44d..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/gmock-port.h
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Low-level types and utilities for porting Google Mock to various
-// platforms.  All macros ending with _ and symbols defined in an
-// internal namespace are subject to change without notice.  Code
-// outside Google Mock MUST NOT USE THEM DIRECTLY.  Macros that don't
-// end with _ are part of Google Mock's public API and can be used by
-// code outside Google Mock.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
-
-#include <assert.h>
-#include <stdlib.h>
-#include <cstdint>
-#include <iostream>
-
-// Most of the utilities needed for porting Google Mock are also
-// required for Google Test and are defined in gtest-port.h.
-//
-// Note to maintainers: to reduce code duplication, prefer adding
-// portability utilities to Google Test's gtest-port.h instead of
-// here, as Google Mock depends on Google Test.  Only add a utility
-// here if it's truly specific to Google Mock.
-
-#include "gtest/internal/gtest-port.h"
-#include "gmock/internal/custom/gmock-port.h"
-
-// For MS Visual C++, check the compiler version. At least VS 2015 is
-// required to compile Google Mock.
-#if defined(_MSC_VER) && _MSC_VER < 1900
-# error "At least Visual C++ 2015 (14.0) is required to compile Google Mock."
-#endif
-
-// Macro for referencing flags.  This is public as we want the user to
-// use this syntax to reference Google Mock flags.
-#define GMOCK_FLAG(name) FLAGS_gmock_##name
-
-#if !defined(GMOCK_DECLARE_bool_)
-
-// Macros for declaring flags.
-# define GMOCK_DECLARE_bool_(name) extern GTEST_API_ bool GMOCK_FLAG(name)
-# define GMOCK_DECLARE_int32_(name) extern GTEST_API_ int32_t GMOCK_FLAG(name)
-# define GMOCK_DECLARE_string_(name) \
-    extern GTEST_API_ ::std::string GMOCK_FLAG(name)
-
-// Macros for defining flags.
-# define GMOCK_DEFINE_bool_(name, default_val, doc) \
-    GTEST_API_ bool GMOCK_FLAG(name) = (default_val)
-# define GMOCK_DEFINE_int32_(name, default_val, doc) \
-    GTEST_API_ int32_t GMOCK_FLAG(name) = (default_val)
-# define GMOCK_DEFINE_string_(name, default_val, doc) \
-    GTEST_API_ ::std::string GMOCK_FLAG(name) = (default_val)
-
-#endif  // !defined(GMOCK_DECLARE_bool_)
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
diff --git a/third_party/googletest/googlemock/include/gmock/internal/gmock-pp.h b/third_party/googletest/googlemock/include/gmock/internal/gmock-pp.h
deleted file mode 100644
index 94d61c0..0000000
--- a/third_party/googletest/googlemock/include/gmock/internal/gmock-pp.h
+++ /dev/null
@@ -1,279 +0,0 @@
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
-
-// Expands and concatenates the arguments. Constructed macros reevaluate.
-#define GMOCK_PP_CAT(_1, _2) GMOCK_PP_INTERNAL_CAT(_1, _2)
-
-// Expands and stringifies the only argument.
-#define GMOCK_PP_STRINGIZE(...) GMOCK_PP_INTERNAL_STRINGIZE(__VA_ARGS__)
-
-// Returns empty. Given a variadic number of arguments.
-#define GMOCK_PP_EMPTY(...)
-
-// Returns a comma. Given a variadic number of arguments.
-#define GMOCK_PP_COMMA(...) ,
-
-// Returns the only argument.
-#define GMOCK_PP_IDENTITY(_1) _1
-
-// Evaluates to the number of arguments after expansion.
-//
-//   #define PAIR x, y
-//
-//   GMOCK_PP_NARG() => 1
-//   GMOCK_PP_NARG(x) => 1
-//   GMOCK_PP_NARG(x, y) => 2
-//   GMOCK_PP_NARG(PAIR) => 2
-//
-// Requires: the number of arguments after expansion is at most 15.
-#define GMOCK_PP_NARG(...) \
-  GMOCK_PP_INTERNAL_16TH(  \
-      (__VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0))
-
-// Returns 1 if the expansion of arguments has an unprotected comma. Otherwise
-// returns 0. Requires no more than 15 unprotected commas.
-#define GMOCK_PP_HAS_COMMA(...) \
-  GMOCK_PP_INTERNAL_16TH(       \
-      (__VA_ARGS__, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0))
-
-// Returns the first argument.
-#define GMOCK_PP_HEAD(...) GMOCK_PP_INTERNAL_HEAD((__VA_ARGS__, unusedArg))
-
-// Returns the tail. A variadic list of all arguments minus the first. Requires
-// at least one argument.
-#define GMOCK_PP_TAIL(...) GMOCK_PP_INTERNAL_TAIL((__VA_ARGS__))
-
-// Calls CAT(_Macro, NARG(__VA_ARGS__))(__VA_ARGS__)
-#define GMOCK_PP_VARIADIC_CALL(_Macro, ...) \
-  GMOCK_PP_IDENTITY(                        \
-      GMOCK_PP_CAT(_Macro, GMOCK_PP_NARG(__VA_ARGS__))(__VA_ARGS__))
-
-// If the arguments after expansion have no tokens, evaluates to `1`. Otherwise
-// evaluates to `0`.
-//
-// Requires: * the number of arguments after expansion is at most 15.
-//           * If the argument is a macro, it must be able to be called with one
-//             argument.
-//
-// Implementation details:
-//
-// There is one case when it generates a compile error: if the argument is macro
-// that cannot be called with one argument.
-//
-//   #define M(a, b)  // it doesn't matter what it expands to
-//
-//   // Expected: expands to `0`.
-//   // Actual: compile error.
-//   GMOCK_PP_IS_EMPTY(M)
-//
-// There are 4 cases tested:
-//
-// * __VA_ARGS__ possible expansion has no unparen'd commas. Expected 0.
-// * __VA_ARGS__ possible expansion is not enclosed in parenthesis. Expected 0.
-// * __VA_ARGS__ possible expansion is not a macro that ()-evaluates to a comma.
-//   Expected 0
-// * __VA_ARGS__ is empty, or has unparen'd commas, or is enclosed in
-//   parenthesis, or is a macro that ()-evaluates to comma. Expected 1.
-//
-// We trigger detection on '0001', i.e. on empty.
-#define GMOCK_PP_IS_EMPTY(...)                                               \
-  GMOCK_PP_INTERNAL_IS_EMPTY(GMOCK_PP_HAS_COMMA(__VA_ARGS__),                \
-                             GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__), \
-                             GMOCK_PP_HAS_COMMA(__VA_ARGS__()),              \
-                             GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__()))
-
-// Evaluates to _Then if _Cond is 1 and _Else if _Cond is 0.
-#define GMOCK_PP_IF(_Cond, _Then, _Else) \
-  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IF_, _Cond)(_Then, _Else)
-
-// Similar to GMOCK_PP_IF but takes _Then and _Else in parentheses.
-//
-// GMOCK_PP_GENERIC_IF(1, (a, b, c), (d, e, f)) => a, b, c
-// GMOCK_PP_GENERIC_IF(0, (a, b, c), (d, e, f)) => d, e, f
-//
-#define GMOCK_PP_GENERIC_IF(_Cond, _Then, _Else) \
-  GMOCK_PP_REMOVE_PARENS(GMOCK_PP_IF(_Cond, _Then, _Else))
-
-// Evaluates to the number of arguments after expansion. Identifies 'empty' as
-// 0.
-//
-//   #define PAIR x, y
-//
-//   GMOCK_PP_NARG0() => 0
-//   GMOCK_PP_NARG0(x) => 1
-//   GMOCK_PP_NARG0(x, y) => 2
-//   GMOCK_PP_NARG0(PAIR) => 2
-//
-// Requires: * the number of arguments after expansion is at most 15.
-//           * If the argument is a macro, it must be able to be called with one
-//             argument.
-#define GMOCK_PP_NARG0(...) \
-  GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(__VA_ARGS__), 0, GMOCK_PP_NARG(__VA_ARGS__))
-
-// Expands to 1 if the first argument starts with something in parentheses,
-// otherwise to 0.
-#define GMOCK_PP_IS_BEGIN_PARENS(...)                              \
-  GMOCK_PP_HEAD(GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_, \
-                             GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C __VA_ARGS__))
-
-// Expands to 1 is there is only one argument and it is enclosed in parentheses.
-#define GMOCK_PP_IS_ENCLOSED_PARENS(...)             \
-  GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(__VA_ARGS__), \
-              GMOCK_PP_IS_EMPTY(GMOCK_PP_EMPTY __VA_ARGS__), 0)
-
-// Remove the parens, requires GMOCK_PP_IS_ENCLOSED_PARENS(args) => 1.
-#define GMOCK_PP_REMOVE_PARENS(...) GMOCK_PP_INTERNAL_REMOVE_PARENS __VA_ARGS__
-
-// Expands to _Macro(0, _Data, e1) _Macro(1, _Data, e2) ... _Macro(K -1, _Data,
-// eK) as many of GMOCK_INTERNAL_NARG0 _Tuple.
-// Requires: * |_Macro| can be called with 3 arguments.
-//           * |_Tuple| expansion has no more than 15 elements.
-#define GMOCK_PP_FOR_EACH(_Macro, _Data, _Tuple)                        \
-  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, GMOCK_PP_NARG0 _Tuple) \
-  (0, _Macro, _Data, _Tuple)
-
-// Expands to _Macro(0, _Data, ) _Macro(1, _Data, ) ... _Macro(K - 1, _Data, )
-// Empty if _K = 0.
-// Requires: * |_Macro| can be called with 3 arguments.
-//           * |_K| literal between 0 and 15
-#define GMOCK_PP_REPEAT(_Macro, _Data, _N)           \
-  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, _N) \
-  (0, _Macro, _Data, GMOCK_PP_INTENRAL_EMPTY_TUPLE)
-
-// Increments the argument, requires the argument to be between 0 and 15.
-#define GMOCK_PP_INC(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_INC_, _i)
-
-// Returns comma if _i != 0. Requires _i to be between 0 and 15.
-#define GMOCK_PP_COMMA_IF(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_COMMA_IF_, _i)
-
-// Internal details follow. Do not use any of these symbols outside of this
-// file or we will break your code.
-#define GMOCK_PP_INTENRAL_EMPTY_TUPLE (, , , , , , , , , , , , , , , )
-#define GMOCK_PP_INTERNAL_CAT(_1, _2) _1##_2
-#define GMOCK_PP_INTERNAL_STRINGIZE(...) #__VA_ARGS__
-#define GMOCK_PP_INTERNAL_CAT_5(_1, _2, _3, _4, _5) _1##_2##_3##_4##_5
-#define GMOCK_PP_INTERNAL_IS_EMPTY(_1, _2, _3, _4)                             \
-  GMOCK_PP_HAS_COMMA(GMOCK_PP_INTERNAL_CAT_5(GMOCK_PP_INTERNAL_IS_EMPTY_CASE_, \
-                                             _1, _2, _3, _4))
-#define GMOCK_PP_INTERNAL_IS_EMPTY_CASE_0001 ,
-#define GMOCK_PP_INTERNAL_IF_1(_Then, _Else) _Then
-#define GMOCK_PP_INTERNAL_IF_0(_Then, _Else) _Else
-
-// Because of MSVC treating a token with a comma in it as a single token when
-// passed to another macro, we need to force it to evaluate it as multiple
-// tokens. We do that by using a "IDENTITY(MACRO PARENTHESIZED_ARGS)" macro. We
-// define one per possible macro that relies on this behavior. Note "_Args" must
-// be parenthesized.
-#define GMOCK_PP_INTERNAL_INTERNAL_16TH(_1, _2, _3, _4, _5, _6, _7, _8, _9, \
-                                        _10, _11, _12, _13, _14, _15, _16,  \
-                                        ...)                                \
-  _16
-#define GMOCK_PP_INTERNAL_16TH(_Args) \
-  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_16TH _Args)
-#define GMOCK_PP_INTERNAL_INTERNAL_HEAD(_1, ...) _1
-#define GMOCK_PP_INTERNAL_HEAD(_Args) \
-  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_HEAD _Args)
-#define GMOCK_PP_INTERNAL_INTERNAL_TAIL(_1, ...) __VA_ARGS__
-#define GMOCK_PP_INTERNAL_TAIL(_Args) \
-  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_TAIL _Args)
-
-#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C(...) 1 _
-#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_1 1,
-#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C \
-  0,
-#define GMOCK_PP_INTERNAL_REMOVE_PARENS(...) __VA_ARGS__
-#define GMOCK_PP_INTERNAL_INC_0 1
-#define GMOCK_PP_INTERNAL_INC_1 2
-#define GMOCK_PP_INTERNAL_INC_2 3
-#define GMOCK_PP_INTERNAL_INC_3 4
-#define GMOCK_PP_INTERNAL_INC_4 5
-#define GMOCK_PP_INTERNAL_INC_5 6
-#define GMOCK_PP_INTERNAL_INC_6 7
-#define GMOCK_PP_INTERNAL_INC_7 8
-#define GMOCK_PP_INTERNAL_INC_8 9
-#define GMOCK_PP_INTERNAL_INC_9 10
-#define GMOCK_PP_INTERNAL_INC_10 11
-#define GMOCK_PP_INTERNAL_INC_11 12
-#define GMOCK_PP_INTERNAL_INC_12 13
-#define GMOCK_PP_INTERNAL_INC_13 14
-#define GMOCK_PP_INTERNAL_INC_14 15
-#define GMOCK_PP_INTERNAL_INC_15 16
-#define GMOCK_PP_INTERNAL_COMMA_IF_0
-#define GMOCK_PP_INTERNAL_COMMA_IF_1 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_2 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_3 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_4 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_5 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_6 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_7 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_8 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_9 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_10 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_11 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_12 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_13 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_14 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_15 ,
-#define GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, _element) \
-  _Macro(_i, _Data, _element)
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_0(_i, _Macro, _Data, _Tuple)
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(_i, _Macro, _Data, _Tuple) \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple)
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_15(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
diff --git a/third_party/googletest/googlemock/scripts/README.md b/third_party/googletest/googlemock/scripts/README.md
deleted file mode 100644
index a3301e5..0000000
--- a/third_party/googletest/googlemock/scripts/README.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# Please Note:
-
-Files in this directory are no longer supported by the maintainers. They
-represent mostly historical artifacts and supported by the community only. There
-is no guarantee whatsoever that these scripts still work.
diff --git a/third_party/googletest/googlemock/scripts/fuse_gmock_files.py b/third_party/googletest/googlemock/scripts/fuse_gmock_files.py
deleted file mode 100755
index 7fa9b3a..0000000
--- a/third_party/googletest/googlemock/scripts/fuse_gmock_files.py
+++ /dev/null
@@ -1,256 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""fuse_gmock_files.py v0.1.0.
-
-Fuses Google Mock and Google Test source code into two .h files and a .cc file.
-
-SYNOPSIS
-       fuse_gmock_files.py [GMOCK_ROOT_DIR] OUTPUT_DIR
-
-       Scans GMOCK_ROOT_DIR for Google Mock and Google Test source
-       code, assuming Google Test is in the GMOCK_ROOT_DIR/../googletest
-       directory, and generates three files:
-       OUTPUT_DIR/gtest/gtest.h, OUTPUT_DIR/gmock/gmock.h, and
-       OUTPUT_DIR/gmock-gtest-all.cc.  Then you can build your tests
-       by adding OUTPUT_DIR to the include search path and linking
-       with OUTPUT_DIR/gmock-gtest-all.cc.  These three files contain
-       everything you need to use Google Mock.  Hence you can
-       "install" Google Mock by copying them to wherever you want.
-
-       GMOCK_ROOT_DIR can be omitted and defaults to the parent
-       directory of the directory holding this script.
-
-EXAMPLES
-       ./fuse_gmock_files.py fused_gmock
-       ./fuse_gmock_files.py path/to/unpacked/gmock fused_gmock
-
-This tool is experimental.  In particular, it assumes that there is no
-conditional inclusion of Google Mock or Google Test headers.  Please
-report any problems to googlemock@googlegroups.com.  You can read
-https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
-for more
-information.
-"""
-
-from __future__ import print_function
-
-import os
-import re
-import sys
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-# We assume that this file is in the scripts/ directory in the Google
-# Mock root directory.
-DEFAULT_GMOCK_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..')
-
-# We need to call into googletest/scripts/fuse_gtest_files.py.
-sys.path.append(os.path.join(DEFAULT_GMOCK_ROOT_DIR, '../googletest/scripts'))
-import fuse_gtest_files as gtest  # pylint:disable=g-import-not-at-top
-
-# Regex for matching
-# '#include "gmock/..."'.
-INCLUDE_GMOCK_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(gmock/.+)"')
-
-# Where to find the source seed files.
-GMOCK_H_SEED = 'include/gmock/gmock.h'
-GMOCK_ALL_CC_SEED = 'src/gmock-all.cc'
-
-# Where to put the generated files.
-GTEST_H_OUTPUT = 'gtest/gtest.h'
-GMOCK_H_OUTPUT = 'gmock/gmock.h'
-GMOCK_GTEST_ALL_CC_OUTPUT = 'gmock-gtest-all.cc'
-
-
-def GetGTestRootDir(gmock_root):
-  """Returns the root directory of Google Test."""
-
-  return os.path.join(gmock_root, '../googletest')
-
-
-def ValidateGMockRootDir(gmock_root):
-  """Makes sure gmock_root points to a valid gmock root directory.
-
-  The function aborts the program on failure.
-
-  Args:
-    gmock_root: A string with the mock root directory.
-  """
-
-  gtest.ValidateGTestRootDir(GetGTestRootDir(gmock_root))
-  gtest.VerifyFileExists(gmock_root, GMOCK_H_SEED)
-  gtest.VerifyFileExists(gmock_root, GMOCK_ALL_CC_SEED)
-
-
-def ValidateOutputDir(output_dir):
-  """Makes sure output_dir points to a valid output directory.
-
-  The function aborts the program on failure.
-
-  Args:
-    output_dir: A string representing the output directory.
-  """
-
-  gtest.VerifyOutputFile(output_dir, gtest.GTEST_H_OUTPUT)
-  gtest.VerifyOutputFile(output_dir, GMOCK_H_OUTPUT)
-  gtest.VerifyOutputFile(output_dir, GMOCK_GTEST_ALL_CC_OUTPUT)
-
-
-def FuseGMockH(gmock_root, output_dir):
-  """Scans folder gmock_root to generate gmock/gmock.h in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GMOCK_H_OUTPUT), 'w')
-  processed_files = set()  # Holds all gmock headers we've processed.
-
-  def ProcessFile(gmock_header_path):
-    """Processes the given gmock header file."""
-
-    # We don't process the same header twice.
-    if gmock_header_path in processed_files:
-      return
-
-    processed_files.add(gmock_header_path)
-
-    # Reads each line in the given gmock header.
-
-    with open(os.path.join(gmock_root, gmock_header_path), 'r') as fh:
-      for line in fh:
-        m = INCLUDE_GMOCK_FILE_REGEX.match(line)
-        if m:
-          # '#include "gmock/..."'
-          # - let's process it recursively.
-          ProcessFile('include/' + m.group(1))
-        else:
-          m = gtest.INCLUDE_GTEST_FILE_REGEX.match(line)
-          if m:
-            # '#include "gtest/foo.h"'
-            # We translate it to "gtest/gtest.h", regardless of what foo is,
-            # since all gtest headers are fused into gtest/gtest.h.
-
-            # There is no need to #include gtest.h twice.
-            if gtest.GTEST_H_SEED not in processed_files:
-              processed_files.add(gtest.GTEST_H_SEED)
-              output_file.write('#include "%s"\n' % (gtest.GTEST_H_OUTPUT,))
-          else:
-            # Otherwise we copy the line unchanged to the output file.
-            output_file.write(line)
-
-  ProcessFile(GMOCK_H_SEED)
-  output_file.close()
-
-
-def FuseGMockAllCcToFile(gmock_root, output_file):
-  """Scans folder gmock_root to fuse gmock-all.cc into output_file."""
-
-  processed_files = set()
-
-  def ProcessFile(gmock_source_file):
-    """Processes the given gmock source file."""
-
-    # We don't process the same #included file twice.
-    if gmock_source_file in processed_files:
-      return
-
-    processed_files.add(gmock_source_file)
-
-    # Reads each line in the given gmock source file.
-
-    with open(os.path.join(gmock_root, gmock_source_file), 'r') as fh:
-      for line in fh:
-        m = INCLUDE_GMOCK_FILE_REGEX.match(line)
-        if m:
-          # '#include "gmock/foo.h"'
-          # We treat it as '#include  "gmock/gmock.h"', as all other gmock
-          # headers are being fused into gmock.h and cannot be
-          # included directly.  No need to
-          # #include "gmock/gmock.h"
-          # more than once.
-
-          if GMOCK_H_SEED not in processed_files:
-            processed_files.add(GMOCK_H_SEED)
-            output_file.write('#include "%s"\n' % (GMOCK_H_OUTPUT,))
-        else:
-          m = gtest.INCLUDE_GTEST_FILE_REGEX.match(line)
-          if m:
-            # '#include "gtest/..."'
-            # There is no need to #include gtest.h as it has been
-            # #included by gtest-all.cc.
-
-            pass
-          else:
-            m = gtest.INCLUDE_SRC_FILE_REGEX.match(line)
-            if m:
-              # It's '#include "src/foo"' - let's process it recursively.
-              ProcessFile(m.group(1))
-            else:
-              # Otherwise we copy the line unchanged to the output file.
-              output_file.write(line)
-
-  ProcessFile(GMOCK_ALL_CC_SEED)
-
-
-def FuseGMockGTestAllCc(gmock_root, output_dir):
-  """Scans folder gmock_root to generate gmock-gtest-all.cc in output_dir."""
-
-  with open(os.path.join(output_dir, GMOCK_GTEST_ALL_CC_OUTPUT),
-            'w') as output_file:
-    # First, fuse gtest-all.cc into gmock-gtest-all.cc.
-    gtest.FuseGTestAllCcToFile(GetGTestRootDir(gmock_root), output_file)
-    # Next, append fused gmock-all.cc to gmock-gtest-all.cc.
-    FuseGMockAllCcToFile(gmock_root, output_file)
-
-
-def FuseGMock(gmock_root, output_dir):
-  """Fuses gtest.h, gmock.h, and gmock-gtest-all.h."""
-
-  ValidateGMockRootDir(gmock_root)
-  ValidateOutputDir(output_dir)
-
-  gtest.FuseGTestH(GetGTestRootDir(gmock_root), output_dir)
-  FuseGMockH(gmock_root, output_dir)
-  FuseGMockGTestAllCc(gmock_root, output_dir)
-
-
-def main():
-  argc = len(sys.argv)
-  if argc == 2:
-    # fuse_gmock_files.py OUTPUT_DIR
-    FuseGMock(DEFAULT_GMOCK_ROOT_DIR, sys.argv[1])
-  elif argc == 3:
-    # fuse_gmock_files.py GMOCK_ROOT_DIR OUTPUT_DIR
-    FuseGMock(sys.argv[1], sys.argv[2])
-  else:
-    print(__doc__)
-    sys.exit(1)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/third_party/googletest/googlemock/scripts/generator/LICENSE b/third_party/googletest/googlemock/scripts/generator/LICENSE
deleted file mode 100644
index 87ea063..0000000
--- a/third_party/googletest/googlemock/scripts/generator/LICENSE
+++ /dev/null
@@ -1,203 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
-      publicly display, publicly perform, sublicense, and distribute the
-      Work and such Derivative Works in Source or Object form.
-
-   3. Grant of Patent License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      (except as stated in this section) patent license to make, have made,
-      use, offer to sell, sell, import, and otherwise transfer the Work,
-      where such license applies only to those patent claims licensable
-      by such Contributor that are necessarily infringed by their
-      Contribution(s) alone or by combination of their Contribution(s)
-      with the Work to which such Contribution(s) was submitted. If You
-      institute patent litigation against any entity (including a
-      cross-claim or counterclaim in a lawsuit) alleging that the Work
-      or a Contribution incorporated within the Work constitutes direct
-      or contributory patent infringement, then any patent licenses
-      granted to You under this License for that Work shall terminate
-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
-
-      (a) You must give any other recipients of the Work or
-          Derivative Works a copy of this License; and
-
-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
-
-      (c) You must retain, in the Source form of any Derivative Works
-          that You distribute, all copyright, patent, trademark, and
-          attribution notices from the Source form of the Work,
-          excluding those notices that do not pertain to any part of
-          the Derivative Works; and
-
-      (d) If the Work includes a "NOTICE" text file as part of its
-          distribution, then any Derivative Works that You distribute must
-          include a readable copy of the attribution notices contained
-          within such NOTICE file, excluding those notices that do not
-          pertain to any part of the Derivative Works, in at least one
-          of the following places: within a NOTICE text file distributed
-          as part of the Derivative Works; within the Source form or
-          documentation, if provided along with the Derivative Works; or,
-          within a display generated by the Derivative Works, if and
-          wherever such third-party notices normally appear. The contents
-          of the NOTICE file are for informational purposes only and
-          do not modify the License. You may add Your own attribution
-          notices within Derivative Works that You distribute, alongside
-          or as an addendum to the NOTICE text from the Work, provided
-          that such additional attribution notices cannot be construed
-          as modifying the License.
-
-      You may add Your own copyright statement to Your modifications and
-      may provide additional or different license terms and conditions
-      for use, reproduction, or distribution of Your modifications, or
-      for any such Derivative Works as a whole, provided Your use,
-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
-
-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright [2007] Neal Norwitz
-   Portions Copyright [2007] Google Inc.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/third_party/googletest/googlemock/scripts/generator/README b/third_party/googletest/googlemock/scripts/generator/README
deleted file mode 100644
index 01fd463..0000000
--- a/third_party/googletest/googlemock/scripts/generator/README
+++ /dev/null
@@ -1,34 +0,0 @@
-
-The Google Mock class generator is an application that is part of cppclean.
-For more information about cppclean, visit http://code.google.com/p/cppclean/
-
-The mock generator requires Python 2.3.5 or later.  If you don't have Python
-installed on your system, you will also need to install it.  You can download
-Python from:  http://www.python.org/download/releases/
-
-To use the Google Mock class generator, you need to call it
-on the command line passing the header file and class for which you want
-to generate a Google Mock class.
-
-Make sure to install the scripts somewhere in your path.  Then you can
-run the program.
-
-  gmock_gen.py header-file.h [ClassName]...
-
-If no ClassNames are specified, all classes in the file are emitted.
-
-To change the indentation from the default of 2, set INDENT in
-the environment.  For example to use an indent of 4 spaces:
-
-INDENT=4 gmock_gen.py header-file.h ClassName
-
-This version was made from SVN revision 281 in the cppclean repository.
-
-Known Limitations
------------------
-Not all code will be generated properly.  For example, when mocking templated
-classes, the template information is lost.  You will need to add the template
-information manually.
-
-Not all permutations of using multiple pointers/references will be rendered
-properly.  These will also have to be fixed manually.
diff --git a/third_party/googletest/googlemock/scripts/generator/README.cppclean b/third_party/googletest/googlemock/scripts/generator/README.cppclean
deleted file mode 100644
index 65431b6..0000000
--- a/third_party/googletest/googlemock/scripts/generator/README.cppclean
+++ /dev/null
@@ -1,115 +0,0 @@
-Goal:
------
-  CppClean attempts to find problems in C++ source that slow development
-  in large code bases, for example various forms of unused code.
-  Unused code can be unused functions, methods, data members, types, etc
-  to unnecessary #include directives.  Unnecessary #includes can cause
-  considerable extra compiles increasing the edit-compile-run cycle.
-
-  The project home page is:   http://code.google.com/p/cppclean/
-
-
-Features:
----------
- * Find and print C++ language constructs: classes, methods, functions, etc.
- * Find classes with virtual methods, no virtual destructor, and no bases
- * Find global/static data that are potential problems when using threads
- * Unnecessary forward class declarations
- * Unnecessary function declarations
- * Undeclared function definitions
- * (planned) Find unnecessary header files #included
-   - No direct reference to anything in the header
-   - Header is unnecessary if classes were forward declared instead
- * (planned) Source files that reference headers not directly #included,
-   ie, files that rely on a transitive #include from another header
- * (planned) Unused members (private, protected, & public) methods and data
- * (planned) Store AST in a SQL database so relationships can be queried
-
-AST is Abstract Syntax Tree, a representation of parsed source code.
-http://en.wikipedia.org/wiki/Abstract_syntax_tree
-
-
-System Requirements:
---------------------
- * Python 2.4 or later (2.3 probably works too)
- * Works on Windows (untested), Mac OS X, and Unix
-
-
-How to Run:
------------
-  For all examples, it is assumed that cppclean resides in a directory called
-  /cppclean.
-
-  To print warnings for classes with virtual methods, no virtual destructor and
-  no base classes:
-
-      /cppclean/run.sh nonvirtual_dtors.py file1.h file2.h file3.cc ...
-
-  To print all the functions defined in header file(s):
-
-      /cppclean/run.sh functions.py file1.h file2.h ...
-
-  All the commands take multiple files on the command line.  Other programs
-  include: find_warnings, headers, methods, and types.  Some other programs
-  are available, but used primarily for debugging.
-
-  run.sh is a simple wrapper that sets PYTHONPATH to /cppclean and then
-  runs the program in /cppclean/cpp/PROGRAM.py.  There is currently
-  no equivalent for Windows.  Contributions for a run.bat file
-  would be greatly appreciated.
-
-
-How to Configure:
------------------
-  You can add a siteheaders.py file in /cppclean/cpp to configure where
-  to look for other headers (typically -I options passed to a compiler).
-  Currently two values are supported:  _TRANSITIVE and GetIncludeDirs.
-  _TRANSITIVE should be set to a boolean value (True or False) indicating
-  whether to transitively process all header files.  The default is False.
-
-  GetIncludeDirs is a function that takes a single argument and returns
-  a sequence of directories to include.  This can be a generator or
-  return a static list.
-
-      def GetIncludeDirs(filename):
-          return ['/some/path/with/other/headers']
-
-      # Here is a more complicated example.
-      def GetIncludeDirs(filename):
-          yield '/path1'
-          yield os.path.join('/path2', os.path.dirname(filename))
-          yield '/path3'
-
-
-How to Test:
-------------
-  For all examples, it is assumed that cppclean resides in a directory called
-  /cppclean.  The tests require
-
-  cd /cppclean
-  make test
-  # To generate expected results after a change:
-  make expected
-
-
-Current Status:
----------------
-  The parser works pretty well for header files, parsing about 99% of Google's
-  header files.  Anything which inspects structure of C++ source files should
-  work reasonably well.  Function bodies are not transformed to an AST,
-  but left as tokens.  Much work is still needed on finding unused header files
-  and storing an AST in a database.
-
-
-Non-goals:
-----------
- * Parsing all valid C++ source
- * Handling invalid C++ source gracefully
- * Compiling to machine code (or anything beyond an AST)
-
-
-Contact:
---------
-  If you used cppclean, I would love to hear about your experiences
-  cppclean@googlegroups.com.  Even if you don't use cppclean, I'd like to
-  hear from you.  :-)  (You can contact me directly at:  nnorwitz@gmail.com)
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/ast.py b/third_party/googletest/googlemock/scripts/generator/cpp/ast.py
deleted file mode 100755
index 0e77016..0000000
--- a/third_party/googletest/googlemock/scripts/generator/cpp/ast.py
+++ /dev/null
@@ -1,1773 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007 Neal Norwitz
-# Portions Copyright 2007 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Generate an Abstract Syntax Tree (AST) for C++."""
-
-# FIXME:
-#  * Tokens should never be exported, need to convert to Nodes
-#    (return types, parameters, etc.)
-#  * Handle static class data for templatized classes
-#  * Handle casts (both C++ and C-style)
-#  * Handle conditions and loops (if/else, switch, for, while/do)
-#
-# TODO much, much later:
-#  * Handle #define
-#  * exceptions
-
-
-try:
-  # Python 3.x
-  import builtins
-except ImportError:
-  # Python 2.x
-  import __builtin__ as builtins
-
-import collections
-import sys
-import traceback
-
-from cpp import keywords
-from cpp import tokenize
-from cpp import utils
-
-
-if not hasattr(builtins, 'reversed'):
-  # Support Python 2.3 and earlier.
-  def reversed(seq):
-    for i in range(len(seq)-1, -1, -1):
-      yield seq[i]
-
-if not hasattr(builtins, 'next'):
-  # Support Python 2.5 and earlier.
-  def next(obj):
-    return obj.next()
-
-
-VISIBILITY_PUBLIC, VISIBILITY_PROTECTED, VISIBILITY_PRIVATE = range(3)
-
-FUNCTION_NONE = 0x00
-FUNCTION_CONST = 0x01
-FUNCTION_VIRTUAL = 0x02
-FUNCTION_PURE_VIRTUAL = 0x04
-FUNCTION_CTOR = 0x08
-FUNCTION_DTOR = 0x10
-FUNCTION_ATTRIBUTE = 0x20
-FUNCTION_UNKNOWN_ANNOTATION = 0x40
-FUNCTION_THROW = 0x80
-FUNCTION_OVERRIDE = 0x100
-
-"""
-These are currently unused.  Should really handle these properly at some point.
-
-TYPE_MODIFIER_INLINE   = 0x010000
-TYPE_MODIFIER_EXTERN   = 0x020000
-TYPE_MODIFIER_STATIC   = 0x040000
-TYPE_MODIFIER_CONST    = 0x080000
-TYPE_MODIFIER_REGISTER = 0x100000
-TYPE_MODIFIER_VOLATILE = 0x200000
-TYPE_MODIFIER_MUTABLE  = 0x400000
-
-TYPE_MODIFIER_MAP = {
-    'inline': TYPE_MODIFIER_INLINE,
-    'extern': TYPE_MODIFIER_EXTERN,
-    'static': TYPE_MODIFIER_STATIC,
-    'const': TYPE_MODIFIER_CONST,
-    'register': TYPE_MODIFIER_REGISTER,
-    'volatile': TYPE_MODIFIER_VOLATILE,
-    'mutable': TYPE_MODIFIER_MUTABLE,
-    }
-"""
-
-_INTERNAL_TOKEN = 'internal'
-_NAMESPACE_POP = 'ns-pop'
-
-
-# TODO(nnorwitz): use this as a singleton for templated_types, etc
-# where we don't want to create a new empty dict each time.  It is also const.
-class _NullDict(object):
-  __contains__ = lambda self: False
-  keys = values = items = iterkeys = itervalues = iteritems = lambda self: ()
-
-
-# TODO(nnorwitz): move AST nodes into a separate module.
-class Node(object):
-  """Base AST node."""
-
-  def __init__(self, start, end):
-    self.start = start
-    self.end = end
-
-  def IsDeclaration(self):
-    """Returns bool if this node is a declaration."""
-    return False
-
-  def IsDefinition(self):
-    """Returns bool if this node is a definition."""
-    return False
-
-  def IsExportable(self):
-    """Returns bool if this node exportable from a header file."""
-    return False
-
-  def Requires(self, node):
-    """Does this AST node require the definition of the node passed in?"""
-    return False
-
-  def XXX__str__(self):
-    return self._StringHelper(self.__class__.__name__, '')
-
-  def _StringHelper(self, name, suffix):
-    if not utils.DEBUG:
-      return '%s(%s)' % (name, suffix)
-    return '%s(%d, %d, %s)' % (name, self.start, self.end, suffix)
-
-  def __repr__(self):
-    return str(self)
-
-
-class Define(Node):
-  def __init__(self, start, end, name, definition):
-    Node.__init__(self, start, end)
-    self.name = name
-    self.definition = definition
-
-  def __str__(self):
-    value = '%s %s' % (self.name, self.definition)
-    return self._StringHelper(self.__class__.__name__, value)
-
-
-class Include(Node):
-  def __init__(self, start, end, filename, system):
-    Node.__init__(self, start, end)
-    self.filename = filename
-    self.system = system
-
-  def __str__(self):
-    fmt = '"%s"'
-    if self.system:
-      fmt = '<%s>'
-    return self._StringHelper(self.__class__.__name__, fmt % self.filename)
-
-
-class Goto(Node):
-  def __init__(self, start, end, label):
-    Node.__init__(self, start, end)
-    self.label = label
-
-  def __str__(self):
-    return self._StringHelper(self.__class__.__name__, str(self.label))
-
-
-class Expr(Node):
-  def __init__(self, start, end, expr):
-    Node.__init__(self, start, end)
-    self.expr = expr
-
-  def Requires(self, node):
-    # TODO(nnorwitz): impl.
-    return False
-
-  def __str__(self):
-    return self._StringHelper(self.__class__.__name__, str(self.expr))
-
-
-class Return(Expr):
-  pass
-
-
-class Delete(Expr):
-  pass
-
-
-class Friend(Expr):
-  def __init__(self, start, end, expr, namespace):
-    Expr.__init__(self, start, end, expr)
-    self.namespace = namespace[:]
-
-
-class Using(Node):
-  def __init__(self, start, end, names):
-    Node.__init__(self, start, end)
-    self.names = names
-
-  def __str__(self):
-    return self._StringHelper(self.__class__.__name__, str(self.names))
-
-
-class Parameter(Node):
-  def __init__(self, start, end, name, parameter_type, default):
-    Node.__init__(self, start, end)
-    self.name = name
-    self.type = parameter_type
-    self.default = default
-
-  def Requires(self, node):
-    # TODO(nnorwitz): handle namespaces, etc.
-    return self.type.name == node.name
-
-  def __str__(self):
-    name = str(self.type)
-    suffix = '%s %s' % (name, self.name)
-    if self.default:
-      suffix += ' = ' + ''.join([d.name for d in self.default])
-    return self._StringHelper(self.__class__.__name__, suffix)
-
-
-class _GenericDeclaration(Node):
-  def __init__(self, start, end, name, namespace):
-    Node.__init__(self, start, end)
-    self.name = name
-    self.namespace = namespace[:]
-
-  def FullName(self):
-    prefix = ''
-    if self.namespace and self.namespace[-1]:
-      prefix = '::'.join(self.namespace) + '::'
-    return prefix + self.name
-
-  def _TypeStringHelper(self, suffix):
-    if self.namespace:
-      names = [n or '<anonymous>' for n in self.namespace]
-      suffix += ' in ' + '::'.join(names)
-    return self._StringHelper(self.__class__.__name__, suffix)
-
-
-# TODO(nnorwitz): merge with Parameter in some way?
-class VariableDeclaration(_GenericDeclaration):
-  def __init__(self, start, end, name, var_type, initial_value, namespace):
-    _GenericDeclaration.__init__(self, start, end, name, namespace)
-    self.type = var_type
-    self.initial_value = initial_value
-
-  def Requires(self, node):
-    # TODO(nnorwitz): handle namespaces, etc.
-    return self.type.name == node.name
-
-  def ToString(self):
-    """Return a string that tries to reconstitute the variable decl."""
-    suffix = '%s %s' % (self.type, self.name)
-    if self.initial_value:
-      suffix += ' = ' + self.initial_value
-    return suffix
-
-  def __str__(self):
-    return self._StringHelper(self.__class__.__name__, self.ToString())
-
-
-class Typedef(_GenericDeclaration):
-  def __init__(self, start, end, name, alias, namespace):
-    _GenericDeclaration.__init__(self, start, end, name, namespace)
-    self.alias = alias
-
-  def IsDefinition(self):
-    return True
-
-  def IsExportable(self):
-    return True
-
-  def Requires(self, node):
-    # TODO(nnorwitz): handle namespaces, etc.
-    name = node.name
-    for token in self.alias:
-      if token is not None and name == token.name:
-        return True
-    return False
-
-  def __str__(self):
-    suffix = '%s, %s' % (self.name, self.alias)
-    return self._TypeStringHelper(suffix)
-
-
-class _NestedType(_GenericDeclaration):
-  def __init__(self, start, end, name, fields, namespace):
-    _GenericDeclaration.__init__(self, start, end, name, namespace)
-    self.fields = fields
-
-  def IsDefinition(self):
-    return True
-
-  def IsExportable(self):
-    return True
-
-  def __str__(self):
-    suffix = '%s, {%s}' % (self.name, self.fields)
-    return self._TypeStringHelper(suffix)
-
-
-class Union(_NestedType):
-  pass
-
-
-class Enum(_NestedType):
-  pass
-
-
-class Class(_GenericDeclaration):
-  def __init__(self, start, end, name, bases, templated_types, body, namespace):
-    _GenericDeclaration.__init__(self, start, end, name, namespace)
-    self.bases = bases
-    self.body = body
-    self.templated_types = templated_types
-
-  def IsDeclaration(self):
-    return self.bases is None and self.body is None
-
-  def IsDefinition(self):
-    return not self.IsDeclaration()
-
-  def IsExportable(self):
-    return not self.IsDeclaration()
-
-  def Requires(self, node):
-    # TODO(nnorwitz): handle namespaces, etc.
-    if self.bases:
-      for token_list in self.bases:
-        # TODO(nnorwitz): bases are tokens, do name comparison.
-        for token in token_list:
-          if token.name == node.name:
-            return True
-    # TODO(nnorwitz): search in body too.
-    return False
-
-  def __str__(self):
-    name = self.name
-    if self.templated_types:
-      name += '<%s>' % self.templated_types
-    suffix = '%s, %s, %s' % (name, self.bases, self.body)
-    return self._TypeStringHelper(suffix)
-
-
-class Struct(Class):
-  pass
-
-
-class Function(_GenericDeclaration):
-  def __init__(self, start, end, name, return_type, parameters,
-               modifiers, templated_types, body, namespace):
-    _GenericDeclaration.__init__(self, start, end, name, namespace)
-    converter = TypeConverter(namespace)
-    self.return_type = converter.CreateReturnType(return_type)
-    self.parameters = converter.ToParameters(parameters)
-    self.modifiers = modifiers
-    self.body = body
-    self.templated_types = templated_types
-
-  def IsDeclaration(self):
-    return self.body is None
-
-  def IsDefinition(self):
-    return self.body is not None
-
-  def IsExportable(self):
-    if self.return_type and 'static' in self.return_type.modifiers:
-      return False
-    return None not in self.namespace
-
-  def Requires(self, node):
-    if self.parameters:
-      # TODO(nnorwitz): parameters are tokens, do name comparison.
-      for p in self.parameters:
-        if p.name == node.name:
-          return True
-    # TODO(nnorwitz): search in body too.
-    return False
-
-  def __str__(self):
-    # TODO(nnorwitz): add templated_types.
-    suffix = ('%s %s(%s), 0x%02x, %s' %
-              (self.return_type, self.name, self.parameters,
-               self.modifiers, self.body))
-    return self._TypeStringHelper(suffix)
-
-
-class Method(Function):
-  def __init__(self, start, end, name, in_class, return_type, parameters,
-               modifiers, templated_types, body, namespace):
-    Function.__init__(self, start, end, name, return_type, parameters,
-                      modifiers, templated_types, body, namespace)
-    # TODO(nnorwitz): in_class could also be a namespace which can
-    # mess up finding functions properly.
-    self.in_class = in_class
-
-
-class Type(_GenericDeclaration):
-  """Type used for any variable (eg class, primitive, struct, etc)."""
-
-  def __init__(self, start, end, name, templated_types, modifiers,
-               reference, pointer, array):
-    """
-        Args:
-          name: str name of main type
-          templated_types: [Class (Type?)] template type info between <>
-          modifiers: [str] type modifiers (keywords) eg, const, mutable, etc.
-          reference, pointer, array: bools
-        """
-    _GenericDeclaration.__init__(self, start, end, name, [])
-    self.templated_types = templated_types
-    if not name and modifiers:
-      self.name = modifiers.pop()
-    self.modifiers = modifiers
-    self.reference = reference
-    self.pointer = pointer
-    self.array = array
-
-  def __str__(self):
-    prefix = ''
-    if self.modifiers:
-      prefix = ' '.join(self.modifiers) + ' '
-    name = str(self.name)
-    if self.templated_types:
-      name += '<%s>' % self.templated_types
-    suffix = prefix + name
-    if self.reference:
-      suffix += '&'
-    if self.pointer:
-      suffix += '*'
-    if self.array:
-      suffix += '[]'
-    return self._TypeStringHelper(suffix)
-
-  # By definition, Is* are always False.  A Type can only exist in
-  # some sort of variable declaration, parameter, or return value.
-  def IsDeclaration(self):
-    return False
-
-  def IsDefinition(self):
-    return False
-
-  def IsExportable(self):
-    return False
-
-
-class TypeConverter(object):
-
-  def __init__(self, namespace_stack):
-    self.namespace_stack = namespace_stack
-
-  def _GetTemplateEnd(self, tokens, start):
-    count = 1
-    end = start
-    while 1:
-      token = tokens[end]
-      end += 1
-      if token.name == '<':
-        count += 1
-      elif token.name == '>':
-        count -= 1
-        if count == 0:
-          break
-    return tokens[start:end-1], end
-
-  def ToType(self, tokens):
-    """Convert [Token,...] to [Class(...), ] useful for base classes.
-        For example, code like class Foo : public Bar<x, y> { ... };
-        the "Bar<x, y>" portion gets converted to an AST.
-
-        Returns:
-          [Class(...), ...]
-        """
-    result = []
-    name_tokens = []
-    reference = pointer = array = False
-
-    def AddType(templated_types):
-      # Partition tokens into name and modifier tokens.
-      names = []
-      modifiers = []
-      for t in name_tokens:
-        if keywords.IsKeyword(t.name):
-          modifiers.append(t.name)
-        else:
-          names.append(t.name)
-      name = ''.join(names)
-      if name_tokens:
-        result.append(Type(name_tokens[0].start, name_tokens[-1].end,
-                           name, templated_types, modifiers,
-                           reference, pointer, array))
-      del name_tokens[:]
-
-    i = 0
-    end = len(tokens)
-    while i < end:
-      token = tokens[i]
-      if token.name == '<':
-        new_tokens, new_end = self._GetTemplateEnd(tokens, i+1)
-        AddType(self.ToType(new_tokens))
-        # If there is a comma after the template, we need to consume
-        # that here otherwise it becomes part of the name.
-        i = new_end
-        reference = pointer = array = False
-      elif token.name == ',':
-        AddType([])
-        reference = pointer = array = False
-      elif token.name == '*':
-        pointer = True
-      elif token.name == '&':
-        reference = True
-      elif token.name == '[':
-        pointer = True
-      elif token.name == ']':
-        pass
-      else:
-        name_tokens.append(token)
-      i += 1
-
-    if name_tokens:
-      # No '<' in the tokens, just a simple name and no template.
-      AddType([])
-    return result
-
-  def DeclarationToParts(self, parts, needs_name_removed):
-    name = None
-    default = []
-    if needs_name_removed:
-      # Handle default (initial) values properly.
-      for i, t in enumerate(parts):
-        if t.name == '=':
-          default = parts[i+1:]
-          name = parts[i-1].name
-          if name == ']' and parts[i-2].name == '[':
-            name = parts[i-3].name
-            i -= 1
-          parts = parts[:i-1]
-          break
-      else:
-        if parts[-1].token_type == tokenize.NAME:
-          name = parts.pop().name
-        else:
-          # TODO(nnorwitz): this is a hack that happens for code like
-          # Register(Foo<T>); where it thinks this is a function call
-          # but it's actually a declaration.
-          name = '???'
-    modifiers = []
-    type_name = []
-    other_tokens = []
-    templated_types = []
-    i = 0
-    end = len(parts)
-    while i < end:
-      p = parts[i]
-      if keywords.IsKeyword(p.name):
-        modifiers.append(p.name)
-      elif p.name == '<':
-        templated_tokens, new_end = self._GetTemplateEnd(parts, i+1)
-        templated_types = self.ToType(templated_tokens)
-        i = new_end - 1
-        # Don't add a spurious :: to data members being initialized.
-        next_index = i + 1
-        if next_index < end and parts[next_index].name == '::':
-          i += 1
-      elif p.name in ('[', ']', '='):
-        # These are handled elsewhere.
-        other_tokens.append(p)
-      elif p.name not in ('*', '&', '>'):
-        # Ensure that names have a space between them.
-        if (type_name and type_name[-1].token_type == tokenize.NAME and
-                p.token_type == tokenize.NAME):
-          type_name.append(tokenize.Token(tokenize.SYNTAX, ' ', 0, 0))
-        type_name.append(p)
-      else:
-        other_tokens.append(p)
-      i += 1
-    type_name = ''.join([t.name for t in type_name])
-    return name, type_name, templated_types, modifiers, default, other_tokens
-
-  def ToParameters(self, tokens):
-    if not tokens:
-      return []
-
-    result = []
-    name = type_name = ''
-    type_modifiers = []
-    pointer = reference = array = False
-    first_token = None
-    default = []
-
-    def AddParameter(end):
-      if default:
-        del default[0]  # Remove flag.
-      parts = self.DeclarationToParts(type_modifiers, True)
-      (name, type_name, templated_types, modifiers,
-       unused_default, unused_other_tokens) = parts
-      parameter_type = Type(first_token.start, first_token.end,
-                            type_name, templated_types, modifiers,
-                            reference, pointer, array)
-      p = Parameter(first_token.start, end, name,
-                    parameter_type, default)
-      result.append(p)
-
-    template_count = 0
-    brace_count = 0
-    for s in tokens:
-      if not first_token:
-        first_token = s
-
-      # Check for braces before templates, as we can have unmatched '<>'
-      # inside default arguments.
-      if s.name == '{':
-        brace_count += 1
-      elif s.name == '}':
-        brace_count -= 1
-      if brace_count > 0:
-        type_modifiers.append(s)
-        continue
-
-      if s.name == '<':
-        template_count += 1
-      elif s.name == '>':
-        template_count -= 1
-      if template_count > 0:
-        type_modifiers.append(s)
-        continue
-
-      if s.name == ',':
-        AddParameter(s.start)
-        name = type_name = ''
-        type_modifiers = []
-        pointer = reference = array = False
-        first_token = None
-        default = []
-      elif s.name == '*':
-        pointer = True
-      elif s.name == '&':
-        reference = True
-      elif s.name == '[':
-        array = True
-      elif s.name == ']':
-        pass  # Just don't add to type_modifiers.
-      elif s.name == '=':
-        # Got a default value.  Add any value (None) as a flag.
-        default.append(None)
-      elif default:
-        default.append(s)
-      else:
-        type_modifiers.append(s)
-    AddParameter(tokens[-1].end)
-    return result
-
-  def CreateReturnType(self, return_type_seq):
-    if not return_type_seq:
-      return None
-    start = return_type_seq[0].start
-    end = return_type_seq[-1].end
-    _, name, templated_types, modifiers, default, other_tokens = \
-        self.DeclarationToParts(return_type_seq, False)
-    names = [n.name for n in other_tokens]
-    reference = '&' in names
-    pointer = '*' in names
-    array = '[' in names
-    return Type(start, end, name, templated_types, modifiers,
-                reference, pointer, array)
-
-  def GetTemplateIndices(self, names):
-    # names is a list of strings.
-    start = names.index('<')
-    end = len(names) - 1
-    while end > 0:
-      if names[end] == '>':
-        break
-      end -= 1
-    return start, end+1
-
-class AstBuilder(object):
-  def __init__(self, token_stream, filename, in_class='', visibility=None,
-               namespace_stack=[]):
-    self.tokens = token_stream
-    self.filename = filename
-    # TODO(nnorwitz): use a better data structure (deque) for the queue.
-    # Switching directions of the "queue" improved perf by about 25%.
-    # Using a deque should be even better since we access from both sides.
-    self.token_queue = []
-    self.namespace_stack = namespace_stack[:]
-    self.in_class = in_class
-    if in_class is None:
-      self.in_class_name_only = None
-    else:
-      self.in_class_name_only = in_class.split('::')[-1]
-    self.visibility = visibility
-    self.in_function = False
-    self.current_token = None
-    # Keep the state whether we are currently handling a typedef or not.
-    self._handling_typedef = False
-
-    self.converter = TypeConverter(self.namespace_stack)
-
-  def HandleError(self, msg, token):
-    printable_queue = list(reversed(self.token_queue[-20:]))
-    sys.stderr.write('Got %s in %s @ %s %s\n' %
-                     (msg, self.filename, token, printable_queue))
-
-  def Generate(self):
-    while 1:
-      token = self._GetNextToken()
-      if not token:
-        break
-
-      # Get the next token.
-      self.current_token = token
-
-      # Dispatch on the next token type.
-      if token.token_type == _INTERNAL_TOKEN:
-        if token.name == _NAMESPACE_POP:
-          self.namespace_stack.pop()
-        continue
-
-      try:
-        result = self._GenerateOne(token)
-        if result is not None:
-          yield result
-      except:
-        self.HandleError('exception', token)
-        raise
-
-  def _CreateVariable(self, pos_token, name, type_name, type_modifiers,
-                      ref_pointer_name_seq, templated_types, value=None):
-    reference = '&' in ref_pointer_name_seq
-    pointer = '*' in ref_pointer_name_seq
-    array = '[' in ref_pointer_name_seq
-    var_type = Type(pos_token.start, pos_token.end, type_name,
-                    templated_types, type_modifiers,
-                    reference, pointer, array)
-    return VariableDeclaration(pos_token.start, pos_token.end,
-                               name, var_type, value, self.namespace_stack)
-
-  def _GenerateOne(self, token):
-    if token.token_type == tokenize.NAME:
-      if (keywords.IsKeyword(token.name) and
-          not keywords.IsBuiltinType(token.name)):
-        if token.name == 'enum':
-          # Pop the next token and only put it back if it's not
-          # 'class'.  This allows us to support the two-token
-          # 'enum class' keyword as if it were simply 'enum'.
-          next = self._GetNextToken()
-          if next.name != 'class':
-            self._AddBackToken(next)
-
-        method = getattr(self, 'handle_' + token.name)
-        return method()
-      elif token.name == self.in_class_name_only:
-        # The token name is the same as the class, must be a ctor if
-        # there is a paren.  Otherwise, it's the return type.
-        # Peek ahead to get the next token to figure out which.
-        next = self._GetNextToken()
-        self._AddBackToken(next)
-        if next.token_type == tokenize.SYNTAX and next.name == '(':
-          return self._GetMethod([token], FUNCTION_CTOR, None, True)
-        # Fall through--handle like any other method.
-
-      # Handle data or function declaration/definition.
-      syntax = tokenize.SYNTAX
-      temp_tokens, last_token = \
-          self._GetVarTokensUpToIgnoringTemplates(syntax,
-                                                  '(', ';', '{', '[')
-      temp_tokens.insert(0, token)
-      if last_token.name == '(':
-        # If there is an assignment before the paren,
-        # this is an expression, not a method.
-        expr = bool([e for e in temp_tokens if e.name == '='])
-        if expr:
-          new_temp = self._GetTokensUpTo(tokenize.SYNTAX, ';')
-          temp_tokens.append(last_token)
-          temp_tokens.extend(new_temp)
-          last_token = tokenize.Token(tokenize.SYNTAX, ';', 0, 0)
-
-      if last_token.name == '[':
-        # Handle array, this isn't a method, unless it's an operator.
-        # TODO(nnorwitz): keep the size somewhere.
-        # unused_size = self._GetTokensUpTo(tokenize.SYNTAX, ']')
-        temp_tokens.append(last_token)
-        if temp_tokens[-2].name == 'operator':
-          temp_tokens.append(self._GetNextToken())
-        else:
-          temp_tokens2, last_token = \
-              self._GetVarTokensUpTo(tokenize.SYNTAX, ';')
-          temp_tokens.extend(temp_tokens2)
-
-      if last_token.name == ';':
-        # Handle data, this isn't a method.
-        parts = self.converter.DeclarationToParts(temp_tokens, True)
-        (name, type_name, templated_types, modifiers, default,
-         unused_other_tokens) = parts
-
-        t0 = temp_tokens[0]
-        names = [t.name for t in temp_tokens]
-        if templated_types:
-          start, end = self.converter.GetTemplateIndices(names)
-          names = names[:start] + names[end:]
-        default = ''.join([t.name for t in default])
-        return self._CreateVariable(t0, name, type_name, modifiers,
-                                    names, templated_types, default)
-      if last_token.name == '{':
-        self._AddBackTokens(temp_tokens[1:])
-        self._AddBackToken(last_token)
-        method_name = temp_tokens[0].name
-        method = getattr(self, 'handle_' + method_name, None)
-        if not method:
-          # Must be declaring a variable.
-          # TODO(nnorwitz): handle the declaration.
-          return None
-        return method()
-      return self._GetMethod(temp_tokens, 0, None, False)
-    elif token.token_type == tokenize.SYNTAX:
-      if token.name == '~' and self.in_class:
-        # Must be a dtor (probably not in method body).
-        token = self._GetNextToken()
-        # self.in_class can contain A::Name, but the dtor will only
-        # be Name.  Make sure to compare against the right value.
-        if (token.token_type == tokenize.NAME and
-                token.name == self.in_class_name_only):
-          return self._GetMethod([token], FUNCTION_DTOR, None, True)
-      # TODO(nnorwitz): handle a lot more syntax.
-    elif token.token_type == tokenize.PREPROCESSOR:
-      # TODO(nnorwitz): handle more preprocessor directives.
-      # token starts with a #, so remove it and strip whitespace.
-      name = token.name[1:].lstrip()
-      if name.startswith('include'):
-        # Remove "include".
-        name = name[7:].strip()
-        assert name
-        # Handle #include \<newline> "header-on-second-line.h".
-        if name.startswith('\\'):
-          name = name[1:].strip()
-        assert name[0] in '<"', token
-        assert name[-1] in '>"', token
-        system = name[0] == '<'
-        filename = name[1:-1]
-        return Include(token.start, token.end, filename, system)
-      if name.startswith('define'):
-        # Remove "define".
-        name = name[6:].strip()
-        assert name
-        value = ''
-        for i, c in enumerate(name):
-          if c.isspace():
-            value = name[i:].lstrip()
-            name = name[:i]
-            break
-        return Define(token.start, token.end, name, value)
-      if name.startswith('if') and name[2:3].isspace():
-        condition = name[3:].strip()
-        if condition.startswith('0') or condition.startswith('(0)'):
-          self._SkipIf0Blocks()
-    return None
-
-  def _GetTokensUpTo(self, expected_token_type, expected_token):
-    return self._GetVarTokensUpTo(expected_token_type, expected_token)[0]
-
-  def _GetVarTokensUpTo(self, expected_token_type, *expected_tokens):
-    last_token = self._GetNextToken()
-    tokens = []
-    while (last_token.token_type != expected_token_type or
-           last_token.name not in expected_tokens):
-      tokens.append(last_token)
-      last_token = self._GetNextToken()
-    return tokens, last_token
-
-  # Same as _GetVarTokensUpTo, but skips over '<...>' which could contain an
-  # expected token.
-  def _GetVarTokensUpToIgnoringTemplates(self, expected_token_type,
-                                         *expected_tokens):
-    last_token = self._GetNextToken()
-    tokens = []
-    nesting = 0
-    while (nesting > 0 or
-           last_token.token_type != expected_token_type or
-           last_token.name not in expected_tokens):
-      tokens.append(last_token)
-      last_token = self._GetNextToken()
-      if last_token.name == '<':
-        nesting += 1
-      elif last_token.name == '>':
-        nesting -= 1
-    return tokens, last_token
-
-  # TODO(nnorwitz): remove _IgnoreUpTo() it shouldn't be necessary.
-  def _IgnoreUpTo(self, token_type, token):
-    unused_tokens = self._GetTokensUpTo(token_type, token)
-
-  def _SkipIf0Blocks(self):
-    count = 1
-    while 1:
-      token = self._GetNextToken()
-      if token.token_type != tokenize.PREPROCESSOR:
-        continue
-
-      name = token.name[1:].lstrip()
-      if name.startswith('endif'):
-        count -= 1
-        if count == 0:
-          break
-      elif name.startswith('if'):
-        count += 1
-
-  def _GetMatchingChar(self, open_paren, close_paren, GetNextToken=None):
-    if GetNextToken is None:
-      GetNextToken = self._GetNextToken
-    # Assumes the current token is open_paren and we will consume
-    # and return up to the close_paren.
-    count = 1
-    token = GetNextToken()
-    while 1:
-      if token.token_type == tokenize.SYNTAX:
-        if token.name == open_paren:
-          count += 1
-        elif token.name == close_paren:
-          count -= 1
-          if count == 0:
-            break
-      yield token
-      token = GetNextToken()
-    yield token
-
-  def _GetParameters(self):
-    return self._GetMatchingChar('(', ')')
-
-  def GetScope(self):
-    return self._GetMatchingChar('{', '}')
-
-  def _GetNextToken(self):
-    if self.token_queue:
-      return self.token_queue.pop()
-    try:
-      return next(self.tokens)
-    except StopIteration:
-      return
-
-  def _AddBackToken(self, token):
-    if token.whence == tokenize.WHENCE_STREAM:
-      token.whence = tokenize.WHENCE_QUEUE
-      self.token_queue.insert(0, token)
-    else:
-      assert token.whence == tokenize.WHENCE_QUEUE, token
-      self.token_queue.append(token)
-
-  def _AddBackTokens(self, tokens):
-    if tokens:
-      if tokens[-1].whence == tokenize.WHENCE_STREAM:
-        for token in tokens:
-          token.whence = tokenize.WHENCE_QUEUE
-        self.token_queue[:0] = reversed(tokens)
-      else:
-        assert tokens[-1].whence == tokenize.WHENCE_QUEUE, tokens
-        self.token_queue.extend(reversed(tokens))
-
-  def GetName(self, seq=None):
-    """Returns ([tokens], next_token_info)."""
-    GetNextToken = self._GetNextToken
-    if seq is not None:
-      it = iter(seq)
-      GetNextToken = lambda: next(it)
-    next_token = GetNextToken()
-    tokens = []
-    last_token_was_name = False
-    while (next_token.token_type == tokenize.NAME or
-           (next_token.token_type == tokenize.SYNTAX and
-            next_token.name in ('::', '<'))):
-      # Two NAMEs in a row means the identifier should terminate.
-      # It's probably some sort of variable declaration.
-      if last_token_was_name and next_token.token_type == tokenize.NAME:
-        break
-      last_token_was_name = next_token.token_type == tokenize.NAME
-      tokens.append(next_token)
-      # Handle templated names.
-      if next_token.name == '<':
-        tokens.extend(self._GetMatchingChar('<', '>', GetNextToken))
-        last_token_was_name = True
-      next_token = GetNextToken()
-    return tokens, next_token
-
-  def GetMethod(self, modifiers, templated_types):
-    return_type_and_name = self._GetTokensUpTo(tokenize.SYNTAX, '(')
-    assert len(return_type_and_name) >= 1
-    return self._GetMethod(return_type_and_name, modifiers, templated_types,
-                           False)
-
-  def _GetMethod(self, return_type_and_name, modifiers, templated_types,
-                 get_paren):
-    template_portion = None
-    if get_paren:
-      token = self._GetNextToken()
-      assert token.token_type == tokenize.SYNTAX, token
-      if token.name == '<':
-        # Handle templatized dtors.
-        template_portion = [token]
-        template_portion.extend(self._GetMatchingChar('<', '>'))
-        token = self._GetNextToken()
-      assert token.token_type == tokenize.SYNTAX, token
-      assert token.name == '(', token
-
-    name = return_type_and_name.pop()
-    # Handle templatized ctors.
-    if name.name == '>':
-      index = 1
-      while return_type_and_name[index].name != '<':
-        index += 1
-      template_portion = return_type_and_name[index:] + [name]
-      del return_type_and_name[index:]
-      name = return_type_and_name.pop()
-    elif name.name == ']':
-      rt = return_type_and_name
-      assert rt[-1].name == '[', return_type_and_name
-      assert rt[-2].name == 'operator', return_type_and_name
-      name_seq = return_type_and_name[-2:]
-      del return_type_and_name[-2:]
-      name = tokenize.Token(tokenize.NAME, 'operator[]',
-                            name_seq[0].start, name.end)
-      # Get the open paren so _GetParameters() below works.
-      unused_open_paren = self._GetNextToken()
-
-    # TODO(nnorwitz): store template_portion.
-    return_type = return_type_and_name
-    indices = name
-    if return_type:
-      indices = return_type[0]
-
-    # Force ctor for templatized ctors.
-    if name.name == self.in_class and not modifiers:
-      modifiers |= FUNCTION_CTOR
-    parameters = list(self._GetParameters())
-    del parameters[-1]              # Remove trailing ')'.
-
-    # Handling operator() is especially weird.
-    if name.name == 'operator' and not parameters:
-      token = self._GetNextToken()
-      assert token.name == '(', token
-      parameters = list(self._GetParameters())
-      del parameters[-1]          # Remove trailing ')'.
-
-    token = self._GetNextToken()
-    while token.token_type == tokenize.NAME:
-      modifier_token = token
-      token = self._GetNextToken()
-      if modifier_token.name == 'const':
-        modifiers |= FUNCTION_CONST
-      elif modifier_token.name == '__attribute__':
-        # TODO(nnorwitz): handle more __attribute__ details.
-        modifiers |= FUNCTION_ATTRIBUTE
-        assert token.name == '(', token
-        # Consume everything between the (parens).
-        unused_tokens = list(self._GetMatchingChar('(', ')'))
-        token = self._GetNextToken()
-      elif modifier_token.name == 'throw':
-        modifiers |= FUNCTION_THROW
-        assert token.name == '(', token
-        # Consume everything between the (parens).
-        unused_tokens = list(self._GetMatchingChar('(', ')'))
-        token = self._GetNextToken()
-      elif modifier_token.name == 'override':
-        modifiers |= FUNCTION_OVERRIDE
-      elif modifier_token.name == modifier_token.name.upper():
-        # HACK(nnorwitz):  assume that all upper-case names
-        # are some macro we aren't expanding.
-        modifiers |= FUNCTION_UNKNOWN_ANNOTATION
-      else:
-        self.HandleError('unexpected token', modifier_token)
-
-    assert token.token_type == tokenize.SYNTAX, token
-    # Handle ctor initializers.
-    if token.name == ':':
-      # TODO(nnorwitz): anything else to handle for initializer list?
-      while token.name != ';' and token.name != '{':
-        token = self._GetNextToken()
-
-    # Handle pointer to functions that are really data but look
-    # like method declarations.
-    if token.name == '(':
-      if parameters[0].name == '*':
-        # name contains the return type.
-        name = parameters.pop()
-        # parameters contains the name of the data.
-        modifiers = [p.name for p in parameters]
-        # Already at the ( to open the parameter list.
-        function_parameters = list(self._GetMatchingChar('(', ')'))
-        del function_parameters[-1]  # Remove trailing ')'.
-        # TODO(nnorwitz): store the function_parameters.
-        token = self._GetNextToken()
-        assert token.token_type == tokenize.SYNTAX, token
-        assert token.name == ';', token
-        return self._CreateVariable(indices, name.name, indices.name,
-                                    modifiers, '', None)
-      # At this point, we got something like:
-      #  return_type (type::*name_)(params);
-      # This is a data member called name_ that is a function pointer.
-      # With this code: void (sq_type::*field_)(string&);
-      # We get: name=void return_type=[] parameters=sq_type ... field_
-      # TODO(nnorwitz): is return_type always empty?
-      # TODO(nnorwitz): this isn't even close to being correct.
-      # Just put in something so we don't crash and can move on.
-      real_name = parameters[-1]
-      modifiers = [p.name for p in self._GetParameters()]
-      del modifiers[-1]           # Remove trailing ')'.
-      return self._CreateVariable(indices, real_name.name, indices.name,
-                                  modifiers, '', None)
-
-    if token.name == '{':
-      body = list(self.GetScope())
-      del body[-1]                # Remove trailing '}'.
-    else:
-      body = None
-      if token.name == '=':
-        token = self._GetNextToken()
-
-        if token.name == 'default' or token.name == 'delete':
-          # Ignore explicitly defaulted and deleted special members
-          # in C++11.
-          token = self._GetNextToken()
-        else:
-          # Handle pure-virtual declarations.
-          assert token.token_type == tokenize.CONSTANT, token
-          assert token.name == '0', token
-          modifiers |= FUNCTION_PURE_VIRTUAL
-          token = self._GetNextToken()
-
-      if token.name == '[':
-        # TODO(nnorwitz): store tokens and improve parsing.
-        # template <typename T, size_t N> char (&ASH(T (&seq)[N]))[N];
-        tokens = list(self._GetMatchingChar('[', ']'))
-        token = self._GetNextToken()
-
-      assert token.name == ';', (token, return_type_and_name, parameters)
-
-    # Looks like we got a method, not a function.
-    if len(return_type) > 2 and return_type[-1].name == '::':
-      return_type, in_class = \
-          self._GetReturnTypeAndClassName(return_type)
-      return Method(indices.start, indices.end, name.name, in_class,
-                    return_type, parameters, modifiers, templated_types,
-                    body, self.namespace_stack)
-    return Function(indices.start, indices.end, name.name, return_type,
-                    parameters, modifiers, templated_types, body,
-                    self.namespace_stack)
-
-  def _GetReturnTypeAndClassName(self, token_seq):
-    # Splitting the return type from the class name in a method
-    # can be tricky.  For example, Return::Type::Is::Hard::To::Find().
-    # Where is the return type and where is the class name?
-    # The heuristic used is to pull the last name as the class name.
-    # This includes all the templated type info.
-    # TODO(nnorwitz): if there is only One name like in the
-    # example above, punt and assume the last bit is the class name.
-
-    # Ignore a :: prefix, if exists so we can find the first real name.
-    i = 0
-    if token_seq[0].name == '::':
-      i = 1
-    # Ignore a :: suffix, if exists.
-    end = len(token_seq) - 1
-    if token_seq[end-1].name == '::':
-      end -= 1
-
-    # Make a copy of the sequence so we can append a sentinel
-    # value. This is required for GetName will has to have some
-    # terminating condition beyond the last name.
-    seq_copy = token_seq[i:end]
-    seq_copy.append(tokenize.Token(tokenize.SYNTAX, '', 0, 0))
-    names = []
-    while i < end:
-      # Iterate through the sequence parsing out each name.
-      new_name, next = self.GetName(seq_copy[i:])
-      assert new_name, 'Got empty new_name, next=%s' % next
-      # We got a pointer or ref.  Add it to the name.
-      if next and next.token_type == tokenize.SYNTAX:
-        new_name.append(next)
-      names.append(new_name)
-      i += len(new_name)
-
-    # Now that we have the names, it's time to undo what we did.
-
-    # Remove the sentinel value.
-    names[-1].pop()
-    # Flatten the token sequence for the return type.
-    return_type = [e for seq in names[:-1] for e in seq]
-    # The class name is the last name.
-    class_name = names[-1]
-    return return_type, class_name
-
-  def handle_bool(self):
-    pass
-
-  def handle_char(self):
-    pass
-
-  def handle_int(self):
-    pass
-
-  def handle_long(self):
-    pass
-
-  def handle_short(self):
-    pass
-
-  def handle_double(self):
-    pass
-
-  def handle_float(self):
-    pass
-
-  def handle_void(self):
-    pass
-
-  def handle_wchar_t(self):
-    pass
-
-  def handle_unsigned(self):
-    pass
-
-  def handle_signed(self):
-    pass
-
-  def _GetNestedType(self, ctor):
-    name = None
-    name_tokens, token = self.GetName()
-    if name_tokens:
-      name = ''.join([t.name for t in name_tokens])
-
-    # Handle forward declarations.
-    if token.token_type == tokenize.SYNTAX and token.name == ';':
-      return ctor(token.start, token.end, name, None,
-                  self.namespace_stack)
-
-    if token.token_type == tokenize.NAME and self._handling_typedef:
-      self._AddBackToken(token)
-      return ctor(token.start, token.end, name, None,
-                  self.namespace_stack)
-
-    # Must be the type declaration.
-    fields = list(self._GetMatchingChar('{', '}'))
-    del fields[-1]                  # Remove trailing '}'.
-    if token.token_type == tokenize.SYNTAX and token.name == '{':
-      next = self._GetNextToken()
-      new_type = ctor(token.start, token.end, name, fields,
-                      self.namespace_stack)
-      # A name means this is an anonymous type and the name
-      # is the variable declaration.
-      if next.token_type != tokenize.NAME:
-        return new_type
-      name = new_type
-      token = next
-
-    # Must be variable declaration using the type prefixed with keyword.
-    assert token.token_type == tokenize.NAME, token
-    return self._CreateVariable(token, token.name, name, [], '', None)
-
-  def handle_struct(self):
-    # Special case the handling typedef/aliasing of structs here.
-    # It would be a pain to handle in the class code.
-    name_tokens, var_token = self.GetName()
-    if name_tokens:
-      next_token = self._GetNextToken()
-      is_syntax = (var_token.token_type == tokenize.SYNTAX and
-                   var_token.name[0] in '*&')
-      is_variable = (var_token.token_type == tokenize.NAME and
-                     next_token.name == ';')
-      variable = var_token
-      if is_syntax and not is_variable:
-        variable = next_token
-        temp = self._GetNextToken()
-        if temp.token_type == tokenize.SYNTAX and temp.name == '(':
-          # Handle methods declared to return a struct.
-          t0 = name_tokens[0]
-          struct = tokenize.Token(tokenize.NAME, 'struct',
-                                  t0.start-7, t0.start-2)
-          type_and_name = [struct]
-          type_and_name.extend(name_tokens)
-          type_and_name.extend((var_token, next_token))
-          return self._GetMethod(type_and_name, 0, None, False)
-        assert temp.name == ';', (temp, name_tokens, var_token)
-      if is_syntax or (is_variable and not self._handling_typedef):
-        modifiers = ['struct']
-        type_name = ''.join([t.name for t in name_tokens])
-        position = name_tokens[0]
-        return self._CreateVariable(position, variable.name, type_name,
-                                    modifiers, var_token.name, None)
-      name_tokens.extend((var_token, next_token))
-      self._AddBackTokens(name_tokens)
-    else:
-      self._AddBackToken(var_token)
-    return self._GetClass(Struct, VISIBILITY_PUBLIC, None)
-
-  def handle_union(self):
-    return self._GetNestedType(Union)
-
-  def handle_enum(self):
-    return self._GetNestedType(Enum)
-
-  def handle_auto(self):
-    # TODO(nnorwitz): warn about using auto?  Probably not since it
-    # will be reclaimed and useful for C++0x.
-    pass
-
-  def handle_register(self):
-    pass
-
-  def handle_const(self):
-    pass
-
-  def handle_inline(self):
-    pass
-
-  def handle_extern(self):
-    pass
-
-  def handle_static(self):
-    pass
-
-  def handle_virtual(self):
-    # What follows must be a method.
-    token = token2 = self._GetNextToken()
-    if token.name == 'inline':
-      # HACK(nnorwitz): handle inline dtors by ignoring 'inline'.
-      token2 = self._GetNextToken()
-    if token2.token_type == tokenize.SYNTAX and token2.name == '~':
-      return self.GetMethod(FUNCTION_VIRTUAL + FUNCTION_DTOR, None)
-    assert token.token_type == tokenize.NAME or token.name == '::', token
-    return_type_and_name, _ = self._GetVarTokensUpToIgnoringTemplates(
-        tokenize.SYNTAX, '(')  # )
-    return_type_and_name.insert(0, token)
-    if token2 is not token:
-      return_type_and_name.insert(1, token2)
-    return self._GetMethod(return_type_and_name, FUNCTION_VIRTUAL,
-                           None, False)
-
-  def handle_volatile(self):
-    pass
-
-  def handle_mutable(self):
-    pass
-
-  def handle_public(self):
-    assert self.in_class
-    self.visibility = VISIBILITY_PUBLIC
-
-  def handle_protected(self):
-    assert self.in_class
-    self.visibility = VISIBILITY_PROTECTED
-
-  def handle_private(self):
-    assert self.in_class
-    self.visibility = VISIBILITY_PRIVATE
-
-  def handle_friend(self):
-    tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';')
-    assert tokens
-    t0 = tokens[0]
-    return Friend(t0.start, t0.end, tokens, self.namespace_stack)
-
-  def handle_static_cast(self):
-    pass
-
-  def handle_const_cast(self):
-    pass
-
-  def handle_dynamic_cast(self):
-    pass
-
-  def handle_reinterpret_cast(self):
-    pass
-
-  def handle_new(self):
-    pass
-
-  def handle_delete(self):
-    tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';')
-    assert tokens
-    return Delete(tokens[0].start, tokens[0].end, tokens)
-
-  def handle_typedef(self):
-    token = self._GetNextToken()
-    if (token.token_type == tokenize.NAME and
-            keywords.IsKeyword(token.name)):
-      # Token must be struct/enum/union/class.
-      method = getattr(self, 'handle_' + token.name)
-      self._handling_typedef = True
-      tokens = [method()]
-      self._handling_typedef = False
-    else:
-      tokens = [token]
-
-    # Get the remainder of the typedef up to the semi-colon.
-    tokens.extend(self._GetTokensUpTo(tokenize.SYNTAX, ';'))
-
-    # TODO(nnorwitz): clean all this up.
-    assert tokens
-    name = tokens.pop()
-    indices = name
-    if tokens:
-      indices = tokens[0]
-    if not indices:
-      indices = token
-    if name.name == ')':
-      # HACK(nnorwitz): Handle pointers to functions "properly".
-      if (len(tokens) >= 4 and
-              tokens[1].name == '(' and tokens[2].name == '*'):
-        tokens.append(name)
-        name = tokens[3]
-    elif name.name == ']':
-      # HACK(nnorwitz): Handle arrays properly.
-      if len(tokens) >= 2:
-        tokens.append(name)
-        name = tokens[1]
-    new_type = tokens
-    if tokens and isinstance(tokens[0], tokenize.Token):
-      new_type = self.converter.ToType(tokens)[0]
-    return Typedef(indices.start, indices.end, name.name,
-                   new_type, self.namespace_stack)
-
-  def handle_typeid(self):
-    pass  # Not needed yet.
-
-  def handle_typename(self):
-    pass  # Not needed yet.
-
-  def _GetTemplatedTypes(self):
-    result = collections.OrderedDict()
-    tokens = list(self._GetMatchingChar('<', '>'))
-    len_tokens = len(tokens) - 1    # Ignore trailing '>'.
-    i = 0
-    while i < len_tokens:
-      key = tokens[i].name
-      i += 1
-      if keywords.IsKeyword(key) or key == ',':
-        continue
-      type_name = default = None
-      if i < len_tokens:
-        i += 1
-        if tokens[i-1].name == '=':
-          assert i < len_tokens, '%s %s' % (i, tokens)
-          default, unused_next_token = self.GetName(tokens[i:])
-          i += len(default)
-        else:
-          if tokens[i-1].name != ',':
-            # We got something like: Type variable.
-            # Re-adjust the key (variable) and type_name (Type).
-            key = tokens[i-1].name
-            type_name = tokens[i-2]
-
-      result[key] = (type_name, default)
-    return result
-
-  def handle_template(self):
-    token = self._GetNextToken()
-    assert token.token_type == tokenize.SYNTAX, token
-    assert token.name == '<', token
-    templated_types = self._GetTemplatedTypes()
-    # TODO(nnorwitz): for now, just ignore the template params.
-    token = self._GetNextToken()
-    if token.token_type == tokenize.NAME:
-      if token.name == 'class':
-        return self._GetClass(Class, VISIBILITY_PRIVATE, templated_types)
-      elif token.name == 'struct':
-        return self._GetClass(Struct, VISIBILITY_PUBLIC, templated_types)
-      elif token.name == 'friend':
-        return self.handle_friend()
-    self._AddBackToken(token)
-    tokens, last = self._GetVarTokensUpTo(tokenize.SYNTAX, '(', ';')
-    tokens.append(last)
-    self._AddBackTokens(tokens)
-    if last.name == '(':
-      return self.GetMethod(FUNCTION_NONE, templated_types)
-    # Must be a variable definition.
-    return None
-
-  def handle_true(self):
-    pass  # Nothing to do.
-
-  def handle_false(self):
-    pass  # Nothing to do.
-
-  def handle_asm(self):
-    pass  # Not needed yet.
-
-  def handle_class(self):
-    return self._GetClass(Class, VISIBILITY_PRIVATE, None)
-
-  def _GetBases(self):
-    # Get base classes.
-    bases = []
-    while 1:
-      token = self._GetNextToken()
-      assert token.token_type == tokenize.NAME, token
-      # TODO(nnorwitz): store kind of inheritance...maybe.
-      if token.name not in ('public', 'protected', 'private'):
-        # If inheritance type is not specified, it is private.
-        # Just put the token back so we can form a name.
-        # TODO(nnorwitz): it would be good to warn about this.
-        self._AddBackToken(token)
-      else:
-        # Check for virtual inheritance.
-        token = self._GetNextToken()
-        if token.name != 'virtual':
-          self._AddBackToken(token)
-        else:
-          # TODO(nnorwitz): store that we got virtual for this base.
-          pass
-      base, next_token = self.GetName()
-      bases_ast = self.converter.ToType(base)
-      assert len(bases_ast) == 1, bases_ast
-      bases.append(bases_ast[0])
-      assert next_token.token_type == tokenize.SYNTAX, next_token
-      if next_token.name == '{':
-        token = next_token
-        break
-      # Support multiple inheritance.
-      assert next_token.name == ',', next_token
-    return bases, token
-
-  def _GetClass(self, class_type, visibility, templated_types):
-    class_name = None
-    class_token = self._GetNextToken()
-    if class_token.token_type != tokenize.NAME:
-      assert class_token.token_type == tokenize.SYNTAX, class_token
-      token = class_token
-    else:
-      # Skip any macro (e.g. storage class specifiers) after the
-      # 'class' keyword.
-      next_token = self._GetNextToken()
-      if next_token.token_type == tokenize.NAME:
-        self._AddBackToken(next_token)
-      else:
-        self._AddBackTokens([class_token, next_token])
-      name_tokens, token = self.GetName()
-      class_name = ''.join([t.name for t in name_tokens])
-    bases = None
-    if token.token_type == tokenize.SYNTAX:
-      if token.name == ';':
-        # Forward declaration.
-        return class_type(class_token.start, class_token.end,
-                          class_name, None, templated_types, None,
-                          self.namespace_stack)
-      if token.name in '*&':
-        # Inline forward declaration.  Could be method or data.
-        name_token = self._GetNextToken()
-        next_token = self._GetNextToken()
-        if next_token.name == ';':
-          # Handle data
-          modifiers = ['class']
-          return self._CreateVariable(class_token, name_token.name,
-                                      class_name,
-                                      modifiers, token.name, None)
-        else:
-          # Assume this is a method.
-          tokens = (class_token, token, name_token, next_token)
-          self._AddBackTokens(tokens)
-          return self.GetMethod(FUNCTION_NONE, None)
-      if token.name == ':':
-        bases, token = self._GetBases()
-
-    body = None
-    if token.token_type == tokenize.SYNTAX and token.name == '{':
-      assert token.token_type == tokenize.SYNTAX, token
-      assert token.name == '{', token
-
-      ast = AstBuilder(self.GetScope(), self.filename, class_name,
-                       visibility, self.namespace_stack)
-      body = list(ast.Generate())
-
-      if not self._handling_typedef:
-        token = self._GetNextToken()
-        if token.token_type != tokenize.NAME:
-          assert token.token_type == tokenize.SYNTAX, token
-          assert token.name == ';', token
-        else:
-          new_class = class_type(class_token.start, class_token.end,
-                                 class_name, bases, None,
-                                 body, self.namespace_stack)
-
-          modifiers = []
-          return self._CreateVariable(class_token,
-                                      token.name, new_class,
-                                      modifiers, token.name, None)
-    else:
-      if not self._handling_typedef:
-        self.HandleError('non-typedef token', token)
-      self._AddBackToken(token)
-
-    return class_type(class_token.start, class_token.end, class_name,
-                      bases, templated_types, body, self.namespace_stack)
-
-  def handle_namespace(self):
-    # Support anonymous namespaces.
-    name = None
-    name_tokens, token = self.GetName()
-    if name_tokens:
-      name = ''.join([t.name for t in name_tokens])
-    self.namespace_stack.append(name)
-    assert token.token_type == tokenize.SYNTAX, token
-    # Create an internal token that denotes when the namespace is complete.
-    internal_token = tokenize.Token(_INTERNAL_TOKEN, _NAMESPACE_POP,
-                                    None, None)
-    internal_token.whence = token.whence
-    if token.name == '=':
-      # TODO(nnorwitz): handle aliasing namespaces.
-      name, next_token = self.GetName()
-      assert next_token.name == ';', next_token
-      self._AddBackToken(internal_token)
-    else:
-      assert token.name == '{', token
-      tokens = list(self.GetScope())
-      # Replace the trailing } with the internal namespace pop token.
-      tokens[-1] = internal_token
-      # Handle namespace with nothing in it.
-      self._AddBackTokens(tokens)
-    return None
-
-  def handle_using(self):
-    tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';')
-    assert tokens
-    return Using(tokens[0].start, tokens[0].end, tokens)
-
-  def handle_explicit(self):
-    assert self.in_class
-    # Nothing much to do.
-    # TODO(nnorwitz): maybe verify the method name == class name.
-    # This must be a ctor.
-    return self.GetMethod(FUNCTION_CTOR, None)
-
-  def handle_this(self):
-    pass  # Nothing to do.
-
-  def handle_operator(self):
-    # Pull off the next token(s?) and make that part of the method name.
-    pass
-
-  def handle_sizeof(self):
-    pass
-
-  def handle_case(self):
-    pass
-
-  def handle_switch(self):
-    pass
-
-  def handle_default(self):
-    token = self._GetNextToken()
-    assert token.token_type == tokenize.SYNTAX
-    assert token.name == ':'
-
-  def handle_if(self):
-    pass
-
-  def handle_else(self):
-    pass
-
-  def handle_return(self):
-    tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';')
-    if not tokens:
-      return Return(self.current_token.start, self.current_token.end, None)
-    return Return(tokens[0].start, tokens[0].end, tokens)
-
-  def handle_goto(self):
-    tokens = self._GetTokensUpTo(tokenize.SYNTAX, ';')
-    assert len(tokens) == 1, str(tokens)
-    return Goto(tokens[0].start, tokens[0].end, tokens[0].name)
-
-  def handle_try(self):
-    pass  # Not needed yet.
-
-  def handle_catch(self):
-    pass  # Not needed yet.
-
-  def handle_throw(self):
-    pass  # Not needed yet.
-
-  def handle_while(self):
-    pass
-
-  def handle_do(self):
-    pass
-
-  def handle_for(self):
-    pass
-
-  def handle_break(self):
-    self._IgnoreUpTo(tokenize.SYNTAX, ';')
-
-  def handle_continue(self):
-    self._IgnoreUpTo(tokenize.SYNTAX, ';')
-
-
-def BuilderFromSource(source, filename):
-  """Utility method that returns an AstBuilder from source code.
-
-    Args:
-      source: 'C++ source code'
-      filename: 'file1'
-
-    Returns:
-      AstBuilder
-    """
-  return AstBuilder(tokenize.GetTokens(source), filename)
-
-
-def PrintIndentifiers(filename, should_print):
-  """Prints all identifiers for a C++ source file.
-
-    Args:
-      filename: 'file1'
-      should_print: predicate with signature: bool Function(token)
-    """
-  source = utils.ReadFile(filename, False)
-  if source is None:
-    sys.stderr.write('Unable to find: %s\n' % filename)
-    return
-
-  #print('Processing %s' % actual_filename)
-  builder = BuilderFromSource(source, filename)
-  try:
-    for node in builder.Generate():
-      if should_print(node):
-        print(node.name)
-  except KeyboardInterrupt:
-    return
-  except:
-    pass
-
-
-def PrintAllIndentifiers(filenames, should_print):
-  """Prints all identifiers for each C++ source file in filenames.
-
-    Args:
-      filenames: ['file1', 'file2', ...]
-      should_print: predicate with signature: bool Function(token)
-    """
-  for path in filenames:
-    PrintIndentifiers(path, should_print)
-
-
-def main(argv):
-  for filename in argv[1:]:
-    source = utils.ReadFile(filename)
-    if source is None:
-      continue
-
-    print('Processing %s' % filename)
-    builder = BuilderFromSource(source, filename)
-    try:
-      entire_ast = filter(None, builder.Generate())
-    except KeyboardInterrupt:
-      return
-    except:
-      # Already printed a warning, print the traceback and continue.
-      traceback.print_exc()
-    else:
-      if utils.DEBUG:
-        for ast in entire_ast:
-          print(ast)
-
-
-if __name__ == '__main__':
-  main(sys.argv)
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/gmock_class.py b/third_party/googletest/googlemock/scripts/generator/cpp/gmock_class.py
deleted file mode 100755
index 3e21022..0000000
--- a/third_party/googletest/googlemock/scripts/generator/cpp/gmock_class.py
+++ /dev/null
@@ -1,247 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008 Google Inc.  All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Generate Google Mock classes from base classes.
-
-This program will read in a C++ source file and output the Google Mock
-classes for the specified classes.  If no class is specified, all
-classes in the source file are emitted.
-
-Usage:
-  gmock_class.py header-file.h [ClassName]...
-
-Output is sent to stdout.
-"""
-
-import os
-import re
-import sys
-
-from cpp import ast
-from cpp import utils
-
-# Preserve compatibility with Python 2.3.
-try:
-  _dummy = set
-except NameError:
-  import sets
-
-  set = sets.Set
-
-_VERSION = (1, 0, 1)  # The version of this script.
-# How many spaces to indent.  Can set me with the INDENT environment variable.
-_INDENT = 2
-
-
-def _RenderType(ast_type):
-  """Renders the potentially recursively templated type into a string.
-
-  Args:
-    ast_type: The AST of the type.
-
-  Returns:
-    Rendered string of the type.
-  """
-  # Add modifiers like 'const'.
-  modifiers = ''
-  if ast_type.modifiers:
-    modifiers = ' '.join(ast_type.modifiers) + ' '
-  return_type = modifiers + ast_type.name
-  if ast_type.templated_types:
-    # Collect template args.
-    template_args = []
-    for arg in ast_type.templated_types:
-      rendered_arg = _RenderType(arg)
-      template_args.append(rendered_arg)
-    return_type += '<' + ', '.join(template_args) + '>'
-  if ast_type.pointer:
-    return_type += '*'
-  if ast_type.reference:
-    return_type += '&'
-  return return_type
-
-
-def _GenerateArg(source):
-  """Strips out comments, default arguments, and redundant spaces from a single argument.
-
-  Args:
-    source: A string for a single argument.
-
-  Returns:
-    Rendered string of the argument.
-  """
-  # Remove end of line comments before eliminating newlines.
-  arg = re.sub(r'//.*', '', source)
-
-  # Remove c-style comments.
-  arg = re.sub(r'/\*.*\*/', '', arg)
-
-  # Remove default arguments.
-  arg = re.sub(r'=.*', '', arg)
-
-  # Collapse spaces and newlines into a single space.
-  arg = re.sub(r'\s+', ' ', arg)
-  return arg.strip()
-
-
-def _EscapeForMacro(s):
-  """Escapes a string for use as an argument to a C++ macro."""
-  paren_count = 0
-  for c in s:
-    if c == '(':
-      paren_count += 1
-    elif c == ')':
-      paren_count -= 1
-    elif c == ',' and paren_count == 0:
-      return '(' + s + ')'
-  return s
-
-
-def _GenerateMethods(output_lines, source, class_node):
-  function_type = (
-      ast.FUNCTION_VIRTUAL | ast.FUNCTION_PURE_VIRTUAL | ast.FUNCTION_OVERRIDE)
-  ctor_or_dtor = ast.FUNCTION_CTOR | ast.FUNCTION_DTOR
-  indent = ' ' * _INDENT
-
-  for node in class_node.body:
-    # We only care about virtual functions.
-    if (isinstance(node, ast.Function) and node.modifiers & function_type and
-        not node.modifiers & ctor_or_dtor):
-      # Pick out all the elements we need from the original function.
-      modifiers = 'override'
-      if node.modifiers & ast.FUNCTION_CONST:
-        modifiers = 'const, ' + modifiers
-
-      return_type = 'void'
-      if node.return_type:
-        return_type = _EscapeForMacro(_RenderType(node.return_type))
-
-      args = []
-      for p in node.parameters:
-        arg = _GenerateArg(source[p.start:p.end])
-        if arg != 'void':
-          args.append(_EscapeForMacro(arg))
-
-      # Create the mock method definition.
-      output_lines.extend([
-          '%sMOCK_METHOD(%s, %s, (%s), (%s));' %
-          (indent, return_type, node.name, ', '.join(args), modifiers)
-      ])
-
-
-def _GenerateMocks(filename, source, ast_list, desired_class_names):
-  processed_class_names = set()
-  lines = []
-  for node in ast_list:
-    if (isinstance(node, ast.Class) and node.body and
-        # desired_class_names being None means that all classes are selected.
-        (not desired_class_names or node.name in desired_class_names)):
-      class_name = node.name
-      parent_name = class_name
-      processed_class_names.add(class_name)
-      class_node = node
-      # Add namespace before the class.
-      if class_node.namespace:
-        lines.extend(['namespace %s {' % n for n in class_node.namespace])  # }
-        lines.append('')
-
-      # Add template args for templated classes.
-      if class_node.templated_types:
-        # TODO(paulchang): Handle non-type template arguments (e.g.
-        # template<typename T, int N>).
-
-        # class_node.templated_types is an OrderedDict from strings to a tuples.
-        # The key is the name of the template, and the value is
-        # (type_name, default). Both type_name and default could be None.
-        template_args = class_node.templated_types.keys()
-        template_decls = ['typename ' + arg for arg in template_args]
-        lines.append('template <' + ', '.join(template_decls) + '>')
-        parent_name += '<' + ', '.join(template_args) + '>'
-
-      # Add the class prolog.
-      lines.append('class Mock%s : public %s {'  # }
-                   % (class_name, parent_name))
-      lines.append('%spublic:' % (' ' * (_INDENT // 2)))
-
-      # Add all the methods.
-      _GenerateMethods(lines, source, class_node)
-
-      # Close the class.
-      if lines:
-        # If there are no virtual methods, no need for a public label.
-        if len(lines) == 2:
-          del lines[-1]
-
-        # Only close the class if there really is a class.
-        lines.append('};')
-        lines.append('')  # Add an extra newline.
-
-      # Close the namespace.
-      if class_node.namespace:
-        for i in range(len(class_node.namespace) - 1, -1, -1):
-          lines.append('}  // namespace %s' % class_node.namespace[i])
-        lines.append('')  # Add an extra newline.
-
-  if desired_class_names:
-    missing_class_name_list = list(desired_class_names - processed_class_names)
-    if missing_class_name_list:
-      missing_class_name_list.sort()
-      sys.stderr.write('Class(es) not found in %s: %s\n' %
-                       (filename, ', '.join(missing_class_name_list)))
-  elif not processed_class_names:
-    sys.stderr.write('No class found in %s\n' % filename)
-
-  return lines
-
-
-def main(argv=sys.argv):
-  if len(argv) < 2:
-    sys.stderr.write('Google Mock Class Generator v%s\n\n' %
-                     '.'.join(map(str, _VERSION)))
-    sys.stderr.write(__doc__)
-    return 1
-
-  global _INDENT
-  try:
-    _INDENT = int(os.environ['INDENT'])
-  except KeyError:
-    pass
-  except:
-    sys.stderr.write('Unable to use indent of %s\n' % os.environ.get('INDENT'))
-
-  filename = argv[1]
-  desired_class_names = None  # None means all classes in the source file.
-  if len(argv) >= 3:
-    desired_class_names = set(argv[2:])
-  source = utils.ReadFile(filename)
-  if source is None:
-    return 1
-
-  builder = ast.BuilderFromSource(source, filename)
-  try:
-    entire_ast = filter(None, builder.Generate())
-  except KeyboardInterrupt:
-    return
-  except:
-    # An error message was already printed since we couldn't parse.
-    sys.exit(1)
-  else:
-    lines = _GenerateMocks(filename, source, entire_ast, desired_class_names)
-    sys.stdout.write('\n'.join(lines))
-
-
-if __name__ == '__main__':
-  main(sys.argv)
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/gmock_class_test.py b/third_party/googletest/googlemock/scripts/generator/cpp/gmock_class_test.py
deleted file mode 100755
index eff475f..0000000
--- a/third_party/googletest/googlemock/scripts/generator/cpp/gmock_class_test.py
+++ /dev/null
@@ -1,570 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009 Neal Norwitz All Rights Reserved.
-# Portions Copyright 2009 Google Inc. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Tests for gmock.scripts.generator.cpp.gmock_class."""
-
-import os
-import sys
-import unittest
-
-# Allow the cpp imports below to work when run as a standalone script.
-sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
-
-from cpp import ast
-from cpp import gmock_class
-
-
-class TestCase(unittest.TestCase):
-  """Helper class that adds assert methods."""
-
-  @staticmethod
-  def StripLeadingWhitespace(lines):
-    """Strip leading whitespace in each line in 'lines'."""
-    return '\n'.join([s.lstrip() for s in lines.split('\n')])
-
-  def assertEqualIgnoreLeadingWhitespace(self, expected_lines, lines):
-    """Specialized assert that ignores the indent level."""
-    self.assertEqual(expected_lines, self.StripLeadingWhitespace(lines))
-
-
-class GenerateMethodsTest(TestCase):
-
-  @staticmethod
-  def GenerateMethodSource(cpp_source):
-    """Convert C++ source to Google Mock output source lines."""
-    method_source_lines = []
-    # <test> is a pseudo-filename, it is not read or written.
-    builder = ast.BuilderFromSource(cpp_source, '<test>')
-    ast_list = list(builder.Generate())
-    gmock_class._GenerateMethods(method_source_lines, cpp_source, ast_list[0])
-    return '\n'.join(method_source_lines)
-
-  def testSimpleMethod(self):
-    source = """
-class Foo {
- public:
-  virtual int Bar();
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testSimpleConstructorsAndDestructor(self):
-    source = """
-class Foo {
- public:
-  Foo();
-  Foo(int x);
-  Foo(const Foo& f);
-  Foo(Foo&& f);
-  ~Foo();
-  virtual int Bar() = 0;
-};
-"""
-    # The constructors and destructor should be ignored.
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testVirtualDestructor(self):
-    source = """
-class Foo {
- public:
-  virtual ~Foo();
-  virtual int Bar() = 0;
-};
-"""
-    # The destructor should be ignored.
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testExplicitlyDefaultedConstructorsAndDestructor(self):
-    source = """
-class Foo {
- public:
-  Foo() = default;
-  Foo(const Foo& f) = default;
-  Foo(Foo&& f) = default;
-  ~Foo() = default;
-  virtual int Bar() = 0;
-};
-"""
-    # The constructors and destructor should be ignored.
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testExplicitlyDeletedConstructorsAndDestructor(self):
-    source = """
-class Foo {
- public:
-  Foo() = delete;
-  Foo(const Foo& f) = delete;
-  Foo(Foo&& f) = delete;
-  ~Foo() = delete;
-  virtual int Bar() = 0;
-};
-"""
-    # The constructors and destructor should be ignored.
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testSimpleOverrideMethod(self):
-    source = """
-class Foo {
- public:
-  int Bar() override;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testSimpleConstMethod(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(bool flag) const;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, (bool flag), (const, override));',
-        self.GenerateMethodSource(source))
-
-  def testExplicitVoid(self):
-    source = """
-class Foo {
- public:
-  virtual int Bar(void);
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testStrangeNewlineInParameter(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(int
-a) = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, (int a), (override));',
-        self.GenerateMethodSource(source))
-
-  def testDefaultParameters(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(int a, char c = 'x') = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, (int a, char c), (override));',
-        self.GenerateMethodSource(source))
-
-  def testMultipleDefaultParameters(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(
-        int a = 42, 
-        char c = 'x', 
-        const int* const p = nullptr, 
-        const std::string& s = "42",
-        char tab[] = {'4','2'},
-        int const *& rp = aDefaultPointer) = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, '
-        '(int a, char c, const int* const p, const std::string& s, char tab[], int const *& rp), '
-        '(override));', self.GenerateMethodSource(source))
-
-  def testMultipleSingleLineDefaultParameters(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(int a = 42, int b = 43, int c = 44) = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, (int a, int b, int c), (override));',
-        self.GenerateMethodSource(source))
-
-  def testConstDefaultParameter(self):
-    source = """
-class Test {
- public:
-  virtual bool Bar(const int test_arg = 42) = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(bool, Bar, (const int test_arg), (override));',
-        self.GenerateMethodSource(source))
-
-  def testConstRefDefaultParameter(self):
-    source = """
-class Test {
- public:
-  virtual bool Bar(const std::string& test_arg = "42" ) = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(bool, Bar, (const std::string& test_arg), (override));',
-        self.GenerateMethodSource(source))
-
-  def testRemovesCommentsWhenDefaultsArePresent(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(int a = 42 /* a comment */,
-                   char /* other comment */ c= 'x') = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, (int a, char c), (override));',
-        self.GenerateMethodSource(source))
-
-  def testDoubleSlashCommentsInParameterListAreRemoved(self):
-    source = """
-class Foo {
- public:
-  virtual void Bar(int a,  // inline comments should be elided.
-                   int b   // inline comments should be elided.
-                   ) const = 0;
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(void, Bar, (int a, int b), (const, override));',
-        self.GenerateMethodSource(source))
-
-  def testCStyleCommentsInParameterListAreNotRemoved(self):
-    # NOTE(nnorwitz): I'm not sure if it's the best behavior to keep these
-    # comments.  Also note that C style comments after the last parameter
-    # are still elided.
-    source = """
-class Foo {
- public:
-  virtual const string& Bar(int /* keeper */, int b);
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(const string&, Bar, (int, int b), (override));',
-        self.GenerateMethodSource(source))
-
-  def testArgsOfTemplateTypes(self):
-    source = """
-class Foo {
- public:
-  virtual int Bar(const vector<int>& v, map<int, string>* output);
-};"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (const vector<int>& v, (map<int, string>* output)), (override));',
-        self.GenerateMethodSource(source))
-
-  def testReturnTypeWithOneTemplateArg(self):
-    source = """
-class Foo {
- public:
-  virtual vector<int>* Bar(int n);
-};"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(vector<int>*, Bar, (int n), (override));',
-        self.GenerateMethodSource(source))
-
-  def testReturnTypeWithManyTemplateArgs(self):
-    source = """
-class Foo {
- public:
-  virtual map<int, string> Bar();
-};"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD((map<int, string>), Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testSimpleMethodInTemplatedClass(self):
-    source = """
-template<class T>
-class Foo {
- public:
-  virtual int Bar();
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (), (override));',
-        self.GenerateMethodSource(source))
-
-  def testPointerArgWithoutNames(self):
-    source = """
-class Foo {
-  virtual int Bar(C*);
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (C*), (override));',
-        self.GenerateMethodSource(source))
-
-  def testReferenceArgWithoutNames(self):
-    source = """
-class Foo {
-  virtual int Bar(C&);
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (C&), (override));',
-        self.GenerateMethodSource(source))
-
-  def testArrayArgWithoutNames(self):
-    source = """
-class Foo {
-  virtual int Bar(C[]);
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(
-        'MOCK_METHOD(int, Bar, (C[]), (override));',
-        self.GenerateMethodSource(source))
-
-
-class GenerateMocksTest(TestCase):
-
-  @staticmethod
-  def GenerateMocks(cpp_source):
-    """Convert C++ source to complete Google Mock output source."""
-    # <test> is a pseudo-filename, it is not read or written.
-    filename = '<test>'
-    builder = ast.BuilderFromSource(cpp_source, filename)
-    ast_list = list(builder.Generate())
-    lines = gmock_class._GenerateMocks(filename, cpp_source, ast_list, None)
-    return '\n'.join(lines)
-
-  def testNamespaces(self):
-    source = """
-namespace Foo {
-namespace Bar { class Forward; }
-namespace Baz::Qux {
-
-class Test {
- public:
-  virtual void Foo();
-};
-
-}  // namespace Baz::Qux
-}  // namespace Foo
-"""
-    expected = """\
-namespace Foo {
-namespace Baz::Qux {
-
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Foo, (), (override));
-};
-
-}  // namespace Baz::Qux
-}  // namespace Foo
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testClassWithStorageSpecifierMacro(self):
-    source = """
-class STORAGE_SPECIFIER Test {
- public:
-  virtual void Foo();
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Foo, (), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testTemplatedForwardDeclaration(self):
-    source = """
-template <class T> class Forward;  // Forward declaration should be ignored.
-class Test {
- public:
-  virtual void Foo();
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Foo, (), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testTemplatedClass(self):
-    source = """
-template <typename S, typename T>
-class Test {
- public:
-  virtual void Foo();
-};
-"""
-    expected = """\
-template <typename S, typename T>
-class MockTest : public Test<S, T> {
-public:
-MOCK_METHOD(void, Foo, (), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testTemplateInATemplateTypedef(self):
-    source = """
-class Test {
- public:
-  typedef std::vector<std::list<int>> FooType;
-  virtual void Bar(const FooType& test_arg);
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Bar, (const FooType& test_arg), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testTemplatedClassWithTemplatedArguments(self):
-    source = """
-template <typename S, typename T, typename U, typename V, typename W>
-class Test {
- public:
-  virtual U Foo(T some_arg);
-};
-"""
-    expected = """\
-template <typename S, typename T, typename U, typename V, typename W>
-class MockTest : public Test<S, T, U, V, W> {
-public:
-MOCK_METHOD(U, Foo, (T some_arg), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testTemplateInATemplateTypedefWithComma(self):
-    source = """
-class Test {
- public:
-  typedef std::function<void(
-      const vector<std::list<int>>&, int> FooType;
-  virtual void Bar(const FooType& test_arg);
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Bar, (const FooType& test_arg), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testParenthesizedCommaInArg(self):
-    source = """
-class Test {
- public:
-   virtual void Bar(std::function<void(int, int)> f);
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Bar, (std::function<void(int, int)> f), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testEnumType(self):
-    source = """
-class Test {
- public:
-  enum Bar {
-    BAZ, QUX, QUUX, QUUUX
-  };
-  virtual void Foo();
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Foo, (), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testEnumClassType(self):
-    source = """
-class Test {
- public:
-  enum class Bar {
-    BAZ, QUX, QUUX, QUUUX
-  };
-  virtual void Foo();
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(void, Foo, (), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-  def testStdFunction(self):
-    source = """
-class Test {
- public:
-  Test(std::function<int(std::string)> foo) : foo_(foo) {}
-
-  virtual std::function<int(std::string)> foo();
-
- private:
-  std::function<int(std::string)> foo_;
-};
-"""
-    expected = """\
-class MockTest : public Test {
-public:
-MOCK_METHOD(std::function<int (std::string)>, foo, (), (override));
-};
-"""
-    self.assertEqualIgnoreLeadingWhitespace(expected,
-                                            self.GenerateMocks(source))
-
-
-if __name__ == '__main__':
-  unittest.main()
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/keywords.py b/third_party/googletest/googlemock/scripts/generator/cpp/keywords.py
deleted file mode 100755
index e428271..0000000
--- a/third_party/googletest/googlemock/scripts/generator/cpp/keywords.py
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007 Neal Norwitz
-# Portions Copyright 2007 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""C++ keywords and helper utilities for determining keywords."""
-
-try:
-    # Python 3.x
-    import builtins
-except ImportError:
-    # Python 2.x
-    import __builtin__ as builtins
-
-
-if not hasattr(builtins, 'set'):
-    # Nominal support for Python 2.3.
-    from sets import Set as set
-
-
-TYPES = set('bool char int long short double float void wchar_t unsigned signed'.split())
-TYPE_MODIFIERS = set('auto register const inline extern static virtual volatile mutable'.split())
-ACCESS = set('public protected private friend'.split())
-
-CASTS = set('static_cast const_cast dynamic_cast reinterpret_cast'.split())
-
-OTHERS = set('true false asm class namespace using explicit this operator sizeof'.split())
-OTHER_TYPES = set('new delete typedef struct union enum typeid typename template'.split())
-
-CONTROL = set('case switch default if else return goto'.split())
-EXCEPTION = set('try catch throw'.split())
-LOOP = set('while do for break continue'.split())
-
-ALL = TYPES | TYPE_MODIFIERS | ACCESS | CASTS | OTHERS | OTHER_TYPES | CONTROL | EXCEPTION | LOOP
-
-
-def IsKeyword(token):
-    return token in ALL
-
-def IsBuiltinType(token):
-    if token in ('virtual', 'inline'):
-        # These only apply to methods, they can't be types by themselves.
-        return False
-    return token in TYPES or token in TYPE_MODIFIERS
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/tokenize.py b/third_party/googletest/googlemock/scripts/generator/cpp/tokenize.py
deleted file mode 100755
index a75edcb..0000000
--- a/third_party/googletest/googlemock/scripts/generator/cpp/tokenize.py
+++ /dev/null
@@ -1,284 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007 Neal Norwitz
-# Portions Copyright 2007 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Tokenize C++ source code."""
-
-try:
-    # Python 3.x
-    import builtins
-except ImportError:
-    # Python 2.x
-    import __builtin__ as builtins
-
-
-import sys
-
-from cpp import utils
-
-
-if not hasattr(builtins, 'set'):
-    # Nominal support for Python 2.3.
-    from sets import Set as set
-
-
-# Add $ as a valid identifier char since so much code uses it.
-_letters = 'abcdefghijklmnopqrstuvwxyz'
-VALID_IDENTIFIER_CHARS = set(_letters + _letters.upper() + '_0123456789$')
-HEX_DIGITS = set('0123456789abcdefABCDEF')
-INT_OR_FLOAT_DIGITS = set('01234567890eE-+')
-
-
-# C++0x string preffixes.
-_STR_PREFIXES = set(('R', 'u8', 'u8R', 'u', 'uR', 'U', 'UR', 'L', 'LR'))
-
-
-# Token types.
-UNKNOWN = 'UNKNOWN'
-SYNTAX = 'SYNTAX'
-CONSTANT = 'CONSTANT'
-NAME = 'NAME'
-PREPROCESSOR = 'PREPROCESSOR'
-
-# Where the token originated from.  This can be used for backtracking.
-# It is always set to WHENCE_STREAM in this code.
-WHENCE_STREAM, WHENCE_QUEUE = range(2)
-
-
-class Token(object):
-    """Data container to represent a C++ token.
-
-    Tokens can be identifiers, syntax char(s), constants, or
-    pre-processor directives.
-
-    start contains the index of the first char of the token in the source
-    end contains the index of the last char of the token in the source
-    """
-
-    def __init__(self, token_type, name, start, end):
-        self.token_type = token_type
-        self.name = name
-        self.start = start
-        self.end = end
-        self.whence = WHENCE_STREAM
-
-    def __str__(self):
-        if not utils.DEBUG:
-            return 'Token(%r)' % self.name
-        return 'Token(%r, %s, %s)' % (self.name, self.start, self.end)
-
-    __repr__ = __str__
-
-
-def _GetString(source, start, i):
-    i = source.find('"', i+1)
-    while source[i-1] == '\\':
-        # Count the trailing backslashes.
-        backslash_count = 1
-        j = i - 2
-        while source[j] == '\\':
-            backslash_count += 1
-            j -= 1
-        # When trailing backslashes are even, they escape each other.
-        if (backslash_count % 2) == 0:
-            break
-        i = source.find('"', i+1)
-    return i + 1
-
-
-def _GetChar(source, start, i):
-    # NOTE(nnorwitz): may not be quite correct, should be good enough.
-    i = source.find("'", i+1)
-    while source[i-1] == '\\':
-        # Need to special case '\\'.
-        if (i - 2) > start and source[i-2] == '\\':
-            break
-        i = source.find("'", i+1)
-    # Try to handle unterminated single quotes (in a #if 0 block).
-    if i < 0:
-        i = start
-    return i + 1
-
-
-def GetTokens(source):
-    """Returns a sequence of Tokens.
-
-    Args:
-      source: string of C++ source code.
-
-    Yields:
-      Token that represents the next token in the source.
-    """
-    # Cache various valid character sets for speed.
-    valid_identifier_chars = VALID_IDENTIFIER_CHARS
-    hex_digits = HEX_DIGITS
-    int_or_float_digits = INT_OR_FLOAT_DIGITS
-    int_or_float_digits2 = int_or_float_digits | set('.')
-
-    # Only ignore errors while in a #if 0 block.
-    ignore_errors = False
-    count_ifs = 0
-
-    i = 0
-    end = len(source)
-    while i < end:
-        # Skip whitespace.
-        while i < end and source[i].isspace():
-            i += 1
-        if i >= end:
-            return
-
-        token_type = UNKNOWN
-        start = i
-        c = source[i]
-        if c.isalpha() or c == '_':              # Find a string token.
-            token_type = NAME
-            while source[i] in valid_identifier_chars:
-                i += 1
-            # String and character constants can look like a name if
-            # they are something like L"".
-            if (source[i] == "'" and (i - start) == 1 and
-                source[start:i] in 'uUL'):
-                # u, U, and L are valid C++0x character preffixes.
-                token_type = CONSTANT
-                i = _GetChar(source, start, i)
-            elif source[i] == "'" and source[start:i] in _STR_PREFIXES:
-                token_type = CONSTANT
-                i = _GetString(source, start, i)
-        elif c == '/' and source[i+1] == '/':    # Find // comments.
-            i = source.find('\n', i)
-            if i == -1:  # Handle EOF.
-                i = end
-            continue
-        elif c == '/' and source[i+1] == '*':    # Find /* comments. */
-            i = source.find('*/', i) + 2
-            continue
-        elif c in ':+-<>&|*=':                   # : or :: (plus other chars).
-            token_type = SYNTAX
-            i += 1
-            new_ch = source[i]
-            if new_ch == c and c != '>':         # Treat ">>" as two tokens.
-                i += 1
-            elif c == '-' and new_ch == '>':
-                i += 1
-            elif new_ch == '=':
-                i += 1
-        elif c in '()[]{}~!?^%;/.,':             # Handle single char tokens.
-            token_type = SYNTAX
-            i += 1
-            if c == '.' and source[i].isdigit():
-                token_type = CONSTANT
-                i += 1
-                while source[i] in int_or_float_digits:
-                    i += 1
-                # Handle float suffixes.
-                for suffix in ('l', 'f'):
-                    if suffix == source[i:i+1].lower():
-                        i += 1
-                        break
-        elif c.isdigit():                        # Find integer.
-            token_type = CONSTANT
-            if c == '0' and source[i+1] in 'xX':
-                # Handle hex digits.
-                i += 2
-                while source[i] in hex_digits:
-                    i += 1
-            else:
-                while source[i] in int_or_float_digits2:
-                    i += 1
-            # Handle integer (and float) suffixes.
-            for suffix in ('ull', 'll', 'ul', 'l', 'f', 'u'):
-                size = len(suffix)
-                if suffix == source[i:i+size].lower():
-                    i += size
-                    break
-        elif c == '"':                           # Find string.
-            token_type = CONSTANT
-            i = _GetString(source, start, i)
-        elif c == "'":                           # Find char.
-            token_type = CONSTANT
-            i = _GetChar(source, start, i)
-        elif c == '#':                           # Find pre-processor command.
-            token_type = PREPROCESSOR
-            got_if = source[i:i+3] == '#if' and source[i+3:i+4].isspace()
-            if got_if:
-                count_ifs += 1
-            elif source[i:i+6] == '#endif':
-                count_ifs -= 1
-                if count_ifs == 0:
-                    ignore_errors = False
-
-            # TODO(nnorwitz): handle preprocessor statements (\ continuations).
-            while 1:
-                i1 = source.find('\n', i)
-                i2 = source.find('//', i)
-                i3 = source.find('/*', i)
-                i4 = source.find('"', i)
-                # NOTE(nnorwitz): doesn't handle comments in #define macros.
-                # Get the first important symbol (newline, comment, EOF/end).
-                i = min([x for x in (i1, i2, i3, i4, end) if x != -1])
-
-                # Handle #include "dir//foo.h" properly.
-                if source[i] == '"':
-                    i = source.find('"', i+1) + 1
-                    assert i > 0
-                    continue
-                # Keep going if end of the line and the line ends with \.
-                if not (i == i1 and source[i-1] == '\\'):
-                    if got_if:
-                        condition = source[start+4:i].lstrip()
-                        if (condition.startswith('0') or
-                            condition.startswith('(0)')):
-                            ignore_errors = True
-                    break
-                i += 1
-        elif c == '\\':                          # Handle \ in code.
-            # This is different from the pre-processor \ handling.
-            i += 1
-            continue
-        elif ignore_errors:
-            # The tokenizer seems to be in pretty good shape.  This
-            # raise is conditionally disabled so that bogus code
-            # in an #if 0 block can be handled.  Since we will ignore
-            # it anyways, this is probably fine.  So disable the
-            # exception and  return the bogus char.
-            i += 1
-        else:
-            sys.stderr.write('Got invalid token in %s @ %d token:%s: %r\n' %
-                             ('?', i, c, source[i-10:i+10]))
-            raise RuntimeError('unexpected token')
-
-        if i <= 0:
-            print('Invalid index, exiting now.')
-            return
-        yield Token(token_type, source[start:i], start, i)
-
-
-if __name__ == '__main__':
-    def main(argv):
-        """Driver mostly for testing purposes."""
-        for filename in argv[1:]:
-            source = utils.ReadFile(filename)
-            if source is None:
-                continue
-
-            for token in GetTokens(source):
-                print('%-12s: %s' % (token.token_type, token.name))
-                # print('\r%6.2f%%' % (100.0 * index / token.end),)
-            sys.stdout.write('\n')
-
-
-    main(sys.argv)
diff --git a/third_party/googletest/googlemock/scripts/generator/cpp/utils.py b/third_party/googletest/googlemock/scripts/generator/cpp/utils.py
deleted file mode 100755
index 6f5fc09..0000000
--- a/third_party/googletest/googlemock/scripts/generator/cpp/utils.py
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007 Neal Norwitz
-# Portions Copyright 2007 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Generic utilities for C++ parsing."""
-
-import sys
-
-# Set to True to see the start/end token indices.
-DEBUG = True
-
-
-def ReadFile(filename, print_error=True):
-    """Returns the contents of a file."""
-    try:
-        fp = open(filename)
-        try:
-            return fp.read()
-        finally:
-            fp.close()
-    except IOError:
-        if print_error:
-            print('Error reading %s: %s' % (filename, sys.exc_info()[1]))
-        return None
diff --git a/third_party/googletest/googlemock/scripts/generator/gmock_gen.py b/third_party/googletest/googlemock/scripts/generator/gmock_gen.py
deleted file mode 100755
index 9d528a5..0000000
--- a/third_party/googletest/googlemock/scripts/generator/gmock_gen.py
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008 Google Inc. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Driver for starting up Google Mock class generator."""
-
-
-import os
-import sys
-
-if __name__ == '__main__':
-  # Add the directory of this script to the path so we can import gmock_class.
-  sys.path.append(os.path.dirname(__file__))
-
-  from cpp import gmock_class
-  # Fix the docstring in case they require the usage.
-  gmock_class.__doc__ = gmock_class.__doc__.replace('gmock_class.py', __file__)
-  gmock_class.main()
diff --git a/third_party/googletest/googlemock/src/gmock-all.cc b/third_party/googletest/googlemock/src/gmock-all.cc
deleted file mode 100644
index e43c9b7..0000000
--- a/third_party/googletest/googlemock/src/gmock-all.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Mocking Framework (Google Mock)
-//
-// This file #includes all Google Mock implementation .cc files.  The
-// purpose is to allow a user to build Google Mock by compiling this
-// file alone.
-
-// This line ensures that gmock.h can be compiled on its own, even
-// when it's fused.
-#include "gmock/gmock.h"
-
-// The following lines pull in the real gmock *.cc files.
-#include "src/gmock-cardinalities.cc"
-#include "src/gmock-internal-utils.cc"
-#include "src/gmock-matchers.cc"
-#include "src/gmock-spec-builders.cc"
-#include "src/gmock.cc"
diff --git a/third_party/googletest/googlemock/src/gmock-cardinalities.cc b/third_party/googletest/googlemock/src/gmock-cardinalities.cc
deleted file mode 100644
index 7463f43..0000000
--- a/third_party/googletest/googlemock/src/gmock-cardinalities.cc
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements cardinalities.
-
-#include "gmock/gmock-cardinalities.h"
-
-#include <limits.h>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include "gmock/internal/gmock-internal-utils.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-
-namespace {
-
-// Implements the Between(m, n) cardinality.
-class BetweenCardinalityImpl : public CardinalityInterface {
- public:
-  BetweenCardinalityImpl(int min, int max)
-      : min_(min >= 0 ? min : 0),
-        max_(max >= min_ ? max : min_) {
-    std::stringstream ss;
-    if (min < 0) {
-      ss << "The invocation lower bound must be >= 0, "
-         << "but is actually " << min << ".";
-      internal::Expect(false, __FILE__, __LINE__, ss.str());
-    } else if (max < 0) {
-      ss << "The invocation upper bound must be >= 0, "
-         << "but is actually " << max << ".";
-      internal::Expect(false, __FILE__, __LINE__, ss.str());
-    } else if (min > max) {
-      ss << "The invocation upper bound (" << max
-         << ") must be >= the invocation lower bound (" << min
-         << ").";
-      internal::Expect(false, __FILE__, __LINE__, ss.str());
-    }
-  }
-
-  // Conservative estimate on the lower/upper bound of the number of
-  // calls allowed.
-  int ConservativeLowerBound() const override { return min_; }
-  int ConservativeUpperBound() const override { return max_; }
-
-  bool IsSatisfiedByCallCount(int call_count) const override {
-    return min_ <= call_count && call_count <= max_;
-  }
-
-  bool IsSaturatedByCallCount(int call_count) const override {
-    return call_count >= max_;
-  }
-
-  void DescribeTo(::std::ostream* os) const override;
-
- private:
-  const int min_;
-  const int max_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(BetweenCardinalityImpl);
-};
-
-// Formats "n times" in a human-friendly way.
-inline std::string FormatTimes(int n) {
-  if (n == 1) {
-    return "once";
-  } else if (n == 2) {
-    return "twice";
-  } else {
-    std::stringstream ss;
-    ss << n << " times";
-    return ss.str();
-  }
-}
-
-// Describes the Between(m, n) cardinality in human-friendly text.
-void BetweenCardinalityImpl::DescribeTo(::std::ostream* os) const {
-  if (min_ == 0) {
-    if (max_ == 0) {
-      *os << "never called";
-    } else if (max_ == INT_MAX) {
-      *os << "called any number of times";
-    } else {
-      *os << "called at most " << FormatTimes(max_);
-    }
-  } else if (min_ == max_) {
-    *os << "called " << FormatTimes(min_);
-  } else if (max_ == INT_MAX) {
-    *os << "called at least " << FormatTimes(min_);
-  } else {
-    // 0 < min_ < max_ < INT_MAX
-    *os << "called between " << min_ << " and " << max_ << " times";
-  }
-}
-
-}  // Unnamed namespace
-
-// Describes the given call count to an ostream.
-void Cardinality::DescribeActualCallCountTo(int actual_call_count,
-                                            ::std::ostream* os) {
-  if (actual_call_count > 0) {
-    *os << "called " << FormatTimes(actual_call_count);
-  } else {
-    *os << "never called";
-  }
-}
-
-// Creates a cardinality that allows at least n calls.
-GTEST_API_ Cardinality AtLeast(int n) { return Between(n, INT_MAX); }
-
-// Creates a cardinality that allows at most n calls.
-GTEST_API_ Cardinality AtMost(int n) { return Between(0, n); }
-
-// Creates a cardinality that allows any number of calls.
-GTEST_API_ Cardinality AnyNumber() { return AtLeast(0); }
-
-// Creates a cardinality that allows between min and max calls.
-GTEST_API_ Cardinality Between(int min, int max) {
-  return Cardinality(new BetweenCardinalityImpl(min, max));
-}
-
-// Creates a cardinality that allows exactly n calls.
-GTEST_API_ Cardinality Exactly(int n) { return Between(n, n); }
-
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/src/gmock-internal-utils.cc b/third_party/googletest/googlemock/src/gmock-internal-utils.cc
deleted file mode 100644
index e5b5479..0000000
--- a/third_party/googletest/googlemock/src/gmock-internal-utils.cc
+++ /dev/null
@@ -1,200 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file defines some utilities useful for implementing Google
-// Mock.  They are subject to change without notice, so please DO NOT
-// USE THEM IN USER CODE.
-
-#include "gmock/internal/gmock-internal-utils.h"
-
-#include <ctype.h>
-#include <ostream>  // NOLINT
-#include <string>
-#include "gmock/gmock.h"
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace internal {
-
-// Joins a vector of strings as if they are fields of a tuple; returns
-// the joined string.
-GTEST_API_ std::string JoinAsTuple(const Strings& fields) {
-  switch (fields.size()) {
-    case 0:
-      return "";
-    case 1:
-      return fields[0];
-    default:
-      std::string result = "(" + fields[0];
-      for (size_t i = 1; i < fields.size(); i++) {
-        result += ", ";
-        result += fields[i];
-      }
-      result += ")";
-      return result;
-  }
-}
-
-// Converts an identifier name to a space-separated list of lower-case
-// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
-// treated as one word.  For example, both "FooBar123" and
-// "foo_bar_123" are converted to "foo bar 123".
-GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name) {
-  std::string result;
-  char prev_char = '\0';
-  for (const char* p = id_name; *p != '\0'; prev_char = *(p++)) {
-    // We don't care about the current locale as the input is
-    // guaranteed to be a valid C++ identifier name.
-    const bool starts_new_word = IsUpper(*p) ||
-        (!IsAlpha(prev_char) && IsLower(*p)) ||
-        (!IsDigit(prev_char) && IsDigit(*p));
-
-    if (IsAlNum(*p)) {
-      if (starts_new_word && result != "")
-        result += ' ';
-      result += ToLower(*p);
-    }
-  }
-  return result;
-}
-
-// This class reports Google Mock failures as Google Test failures.  A
-// user can define another class in a similar fashion if they intend to
-// use Google Mock with a testing framework other than Google Test.
-class GoogleTestFailureReporter : public FailureReporterInterface {
- public:
-  void ReportFailure(FailureType type, const char* file, int line,
-                     const std::string& message) override {
-    AssertHelper(type == kFatal ?
-                 TestPartResult::kFatalFailure :
-                 TestPartResult::kNonFatalFailure,
-                 file,
-                 line,
-                 message.c_str()) = Message();
-    if (type == kFatal) {
-      posix::Abort();
-    }
-  }
-};
-
-// Returns the global failure reporter.  Will create a
-// GoogleTestFailureReporter and return it the first time called.
-GTEST_API_ FailureReporterInterface* GetFailureReporter() {
-  // Points to the global failure reporter used by Google Mock.  gcc
-  // guarantees that the following use of failure_reporter is
-  // thread-safe.  We may need to add additional synchronization to
-  // protect failure_reporter if we port Google Mock to other
-  // compilers.
-  static FailureReporterInterface* const failure_reporter =
-      new GoogleTestFailureReporter();
-  return failure_reporter;
-}
-
-// Protects global resources (stdout in particular) used by Log().
-static GTEST_DEFINE_STATIC_MUTEX_(g_log_mutex);
-
-// Returns true if and only if a log with the given severity is visible
-// according to the --gmock_verbose flag.
-GTEST_API_ bool LogIsVisible(LogSeverity severity) {
-  if (GMOCK_FLAG(verbose) == kInfoVerbosity) {
-    // Always show the log if --gmock_verbose=info.
-    return true;
-  } else if (GMOCK_FLAG(verbose) == kErrorVerbosity) {
-    // Always hide it if --gmock_verbose=error.
-    return false;
-  } else {
-    // If --gmock_verbose is neither "info" nor "error", we treat it
-    // as "warning" (its default value).
-    return severity == kWarning;
-  }
-}
-
-// Prints the given message to stdout if and only if 'severity' >= the level
-// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
-// 0, also prints the stack trace excluding the top
-// stack_frames_to_skip frames.  In opt mode, any positive
-// stack_frames_to_skip is treated as 0, since we don't know which
-// function calls will be inlined by the compiler and need to be
-// conservative.
-GTEST_API_ void Log(LogSeverity severity, const std::string& message,
-                    int stack_frames_to_skip) {
-  if (!LogIsVisible(severity))
-    return;
-
-  // Ensures that logs from different threads don't interleave.
-  MutexLock l(&g_log_mutex);
-
-  if (severity == kWarning) {
-    // Prints a GMOCK WARNING marker to make the warnings easily searchable.
-    std::cout << "\nGMOCK WARNING:";
-  }
-  // Pre-pends a new-line to message if it doesn't start with one.
-  if (message.empty() || message[0] != '\n') {
-    std::cout << "\n";
-  }
-  std::cout << message;
-  if (stack_frames_to_skip >= 0) {
-#ifdef NDEBUG
-    // In opt mode, we have to be conservative and skip no stack frame.
-    const int actual_to_skip = 0;
-#else
-    // In dbg mode, we can do what the caller tell us to do (plus one
-    // for skipping this function's stack frame).
-    const int actual_to_skip = stack_frames_to_skip + 1;
-#endif  // NDEBUG
-
-    // Appends a new-line to message if it doesn't end with one.
-    if (!message.empty() && *message.rbegin() != '\n') {
-      std::cout << "\n";
-    }
-    std::cout << "Stack trace:\n"
-         << ::testing::internal::GetCurrentOsStackTraceExceptTop(
-             ::testing::UnitTest::GetInstance(), actual_to_skip);
-  }
-  std::cout << ::std::flush;
-}
-
-GTEST_API_ WithoutMatchers GetWithoutMatchers() { return WithoutMatchers(); }
-
-GTEST_API_ void IllegalDoDefault(const char* file, int line) {
-  internal::Assert(
-      false, file, line,
-      "You are using DoDefault() inside a composite action like "
-      "DoAll() or WithArgs().  This is not supported for technical "
-      "reasons.  Please instead spell out the default action, or "
-      "assign the default action to an Action variable and use "
-      "the variable in various places.");
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/src/gmock-matchers.cc b/third_party/googletest/googlemock/src/gmock-matchers.cc
deleted file mode 100644
index dded437..0000000
--- a/third_party/googletest/googlemock/src/gmock-matchers.cc
+++ /dev/null
@@ -1,459 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements Matcher<const string&>, Matcher<string>, and
-// utilities for defining matchers.
-
-#include "gmock/gmock-matchers.h"
-
-#include <string.h>
-#include <iostream>
-#include <sstream>
-#include <string>
-
-namespace testing {
-namespace internal {
-
-// Returns the description for a matcher defined using the MATCHER*()
-// macro where the user-supplied description string is "", if
-// 'negation' is false; otherwise returns the description of the
-// negation of the matcher.  'param_values' contains a list of strings
-// that are the print-out of the matcher's parameters.
-GTEST_API_ std::string FormatMatcherDescription(bool negation,
-                                                const char* matcher_name,
-                                                const Strings& param_values) {
-  std::string result = ConvertIdentifierNameToWords(matcher_name);
-  if (param_values.size() >= 1) result += " " + JoinAsTuple(param_values);
-  return negation ? "not (" + result + ")" : result;
-}
-
-// FindMaxBipartiteMatching and its helper class.
-//
-// Uses the well-known Ford-Fulkerson max flow method to find a maximum
-// bipartite matching. Flow is considered to be from left to right.
-// There is an implicit source node that is connected to all of the left
-// nodes, and an implicit sink node that is connected to all of the
-// right nodes. All edges have unit capacity.
-//
-// Neither the flow graph nor the residual flow graph are represented
-// explicitly. Instead, they are implied by the information in 'graph' and
-// a vector<int> called 'left_' whose elements are initialized to the
-// value kUnused. This represents the initial state of the algorithm,
-// where the flow graph is empty, and the residual flow graph has the
-// following edges:
-//   - An edge from source to each left_ node
-//   - An edge from each right_ node to sink
-//   - An edge from each left_ node to each right_ node, if the
-//     corresponding edge exists in 'graph'.
-//
-// When the TryAugment() method adds a flow, it sets left_[l] = r for some
-// nodes l and r. This induces the following changes:
-//   - The edges (source, l), (l, r), and (r, sink) are added to the
-//     flow graph.
-//   - The same three edges are removed from the residual flow graph.
-//   - The reverse edges (l, source), (r, l), and (sink, r) are added
-//     to the residual flow graph, which is a directional graph
-//     representing unused flow capacity.
-//
-// When the method augments a flow (moving left_[l] from some r1 to some
-// other r2), this can be thought of as "undoing" the above steps with
-// respect to r1 and "redoing" them with respect to r2.
-//
-// It bears repeating that the flow graph and residual flow graph are
-// never represented explicitly, but can be derived by looking at the
-// information in 'graph' and in left_.
-//
-// As an optimization, there is a second vector<int> called right_ which
-// does not provide any new information. Instead, it enables more
-// efficient queries about edges entering or leaving the right-side nodes
-// of the flow or residual flow graphs. The following invariants are
-// maintained:
-//
-// left[l] == kUnused or right[left[l]] == l
-// right[r] == kUnused or left[right[r]] == r
-//
-// . [ source ]                                        .
-// .   |||                                             .
-// .   |||                                             .
-// .   ||\--> left[0]=1  ---\    right[0]=-1 ----\     .
-// .   ||                   |                    |     .
-// .   |\---> left[1]=-1    \--> right[1]=0  ---\|     .
-// .   |                                        ||     .
-// .   \----> left[2]=2  ------> right[2]=2  --\||     .
-// .                                           |||     .
-// .         elements           matchers       vvv     .
-// .                                         [ sink ]  .
-//
-// See Also:
-//   [1] Cormen, et al (2001). "Section 26.2: The Ford-Fulkerson method".
-//       "Introduction to Algorithms (Second ed.)", pp. 651-664.
-//   [2] "Ford-Fulkerson algorithm", Wikipedia,
-//       'http://en.wikipedia.org/wiki/Ford%E2%80%93Fulkerson_algorithm'
-class MaxBipartiteMatchState {
- public:
-  explicit MaxBipartiteMatchState(const MatchMatrix& graph)
-      : graph_(&graph),
-        left_(graph_->LhsSize(), kUnused),
-        right_(graph_->RhsSize(), kUnused) {}
-
-  // Returns the edges of a maximal match, each in the form {left, right}.
-  ElementMatcherPairs Compute() {
-    // 'seen' is used for path finding { 0: unseen, 1: seen }.
-    ::std::vector<char> seen;
-    // Searches the residual flow graph for a path from each left node to
-    // the sink in the residual flow graph, and if one is found, add flow
-    // to the graph. It's okay to search through the left nodes once. The
-    // edge from the implicit source node to each previously-visited left
-    // node will have flow if that left node has any path to the sink
-    // whatsoever. Subsequent augmentations can only add flow to the
-    // network, and cannot take away that previous flow unit from the source.
-    // Since the source-to-left edge can only carry one flow unit (or,
-    // each element can be matched to only one matcher), there is no need
-    // to visit the left nodes more than once looking for augmented paths.
-    // The flow is known to be possible or impossible by looking at the
-    // node once.
-    for (size_t ilhs = 0; ilhs < graph_->LhsSize(); ++ilhs) {
-      // Reset the path-marking vector and try to find a path from
-      // source to sink starting at the left_[ilhs] node.
-      GTEST_CHECK_(left_[ilhs] == kUnused)
-          << "ilhs: " << ilhs << ", left_[ilhs]: " << left_[ilhs];
-      // 'seen' initialized to 'graph_->RhsSize()' copies of 0.
-      seen.assign(graph_->RhsSize(), 0);
-      TryAugment(ilhs, &seen);
-    }
-    ElementMatcherPairs result;
-    for (size_t ilhs = 0; ilhs < left_.size(); ++ilhs) {
-      size_t irhs = left_[ilhs];
-      if (irhs == kUnused) continue;
-      result.push_back(ElementMatcherPair(ilhs, irhs));
-    }
-    return result;
-  }
-
- private:
-  static const size_t kUnused = static_cast<size_t>(-1);
-
-  // Perform a depth-first search from left node ilhs to the sink.  If a
-  // path is found, flow is added to the network by linking the left and
-  // right vector elements corresponding each segment of the path.
-  // Returns true if a path to sink was found, which means that a unit of
-  // flow was added to the network. The 'seen' vector elements correspond
-  // to right nodes and are marked to eliminate cycles from the search.
-  //
-  // Left nodes will only be explored at most once because they
-  // are accessible from at most one right node in the residual flow
-  // graph.
-  //
-  // Note that left_[ilhs] is the only element of left_ that TryAugment will
-  // potentially transition from kUnused to another value. Any other
-  // left_ element holding kUnused before TryAugment will be holding it
-  // when TryAugment returns.
-  //
-  bool TryAugment(size_t ilhs, ::std::vector<char>* seen) {
-    for (size_t irhs = 0; irhs < graph_->RhsSize(); ++irhs) {
-      if ((*seen)[irhs]) continue;
-      if (!graph_->HasEdge(ilhs, irhs)) continue;
-      // There's an available edge from ilhs to irhs.
-      (*seen)[irhs] = 1;
-      // Next a search is performed to determine whether
-      // this edge is a dead end or leads to the sink.
-      //
-      // right_[irhs] == kUnused means that there is residual flow from
-      // right node irhs to the sink, so we can use that to finish this
-      // flow path and return success.
-      //
-      // Otherwise there is residual flow to some ilhs. We push flow
-      // along that path and call ourselves recursively to see if this
-      // ultimately leads to sink.
-      if (right_[irhs] == kUnused || TryAugment(right_[irhs], seen)) {
-        // Add flow from left_[ilhs] to right_[irhs].
-        left_[ilhs] = irhs;
-        right_[irhs] = ilhs;
-        return true;
-      }
-    }
-    return false;
-  }
-
-  const MatchMatrix* graph_;  // not owned
-  // Each element of the left_ vector represents a left hand side node
-  // (i.e. an element) and each element of right_ is a right hand side
-  // node (i.e. a matcher). The values in the left_ vector indicate
-  // outflow from that node to a node on the right_ side. The values
-  // in the right_ indicate inflow, and specify which left_ node is
-  // feeding that right_ node, if any. For example, left_[3] == 1 means
-  // there's a flow from element #3 to matcher #1. Such a flow would also
-  // be redundantly represented in the right_ vector as right_[1] == 3.
-  // Elements of left_ and right_ are either kUnused or mutually
-  // referent. Mutually referent means that left_[right_[i]] = i and
-  // right_[left_[i]] = i.
-  ::std::vector<size_t> left_;
-  ::std::vector<size_t> right_;
-};
-
-const size_t MaxBipartiteMatchState::kUnused;
-
-GTEST_API_ ElementMatcherPairs FindMaxBipartiteMatching(const MatchMatrix& g) {
-  return MaxBipartiteMatchState(g).Compute();
-}
-
-static void LogElementMatcherPairVec(const ElementMatcherPairs& pairs,
-                                     ::std::ostream* stream) {
-  typedef ElementMatcherPairs::const_iterator Iter;
-  ::std::ostream& os = *stream;
-  os << "{";
-  const char* sep = "";
-  for (Iter it = pairs.begin(); it != pairs.end(); ++it) {
-    os << sep << "\n  ("
-       << "element #" << it->first << ", "
-       << "matcher #" << it->second << ")";
-    sep = ",";
-  }
-  os << "\n}";
-}
-
-bool MatchMatrix::NextGraph() {
-  for (size_t ilhs = 0; ilhs < LhsSize(); ++ilhs) {
-    for (size_t irhs = 0; irhs < RhsSize(); ++irhs) {
-      char& b = matched_[SpaceIndex(ilhs, irhs)];
-      if (!b) {
-        b = 1;
-        return true;
-      }
-      b = 0;
-    }
-  }
-  return false;
-}
-
-void MatchMatrix::Randomize() {
-  for (size_t ilhs = 0; ilhs < LhsSize(); ++ilhs) {
-    for (size_t irhs = 0; irhs < RhsSize(); ++irhs) {
-      char& b = matched_[SpaceIndex(ilhs, irhs)];
-      b = static_cast<char>(rand() & 1);  // NOLINT
-    }
-  }
-}
-
-std::string MatchMatrix::DebugString() const {
-  ::std::stringstream ss;
-  const char* sep = "";
-  for (size_t i = 0; i < LhsSize(); ++i) {
-    ss << sep;
-    for (size_t j = 0; j < RhsSize(); ++j) {
-      ss << HasEdge(i, j);
-    }
-    sep = ";";
-  }
-  return ss.str();
-}
-
-void UnorderedElementsAreMatcherImplBase::DescribeToImpl(
-    ::std::ostream* os) const {
-  switch (match_flags()) {
-    case UnorderedMatcherRequire::ExactMatch:
-      if (matcher_describers_.empty()) {
-        *os << "is empty";
-        return;
-      }
-      if (matcher_describers_.size() == 1) {
-        *os << "has " << Elements(1) << " and that element ";
-        matcher_describers_[0]->DescribeTo(os);
-        return;
-      }
-      *os << "has " << Elements(matcher_describers_.size())
-          << " and there exists some permutation of elements such that:\n";
-      break;
-    case UnorderedMatcherRequire::Superset:
-      *os << "a surjection from elements to requirements exists such that:\n";
-      break;
-    case UnorderedMatcherRequire::Subset:
-      *os << "an injection from elements to requirements exists such that:\n";
-      break;
-  }
-
-  const char* sep = "";
-  for (size_t i = 0; i != matcher_describers_.size(); ++i) {
-    *os << sep;
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      *os << " - element #" << i << " ";
-    } else {
-      *os << " - an element ";
-    }
-    matcher_describers_[i]->DescribeTo(os);
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      sep = ", and\n";
-    } else {
-      sep = "\n";
-    }
-  }
-}
-
-void UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(
-    ::std::ostream* os) const {
-  switch (match_flags()) {
-    case UnorderedMatcherRequire::ExactMatch:
-      if (matcher_describers_.empty()) {
-        *os << "isn't empty";
-        return;
-      }
-      if (matcher_describers_.size() == 1) {
-        *os << "doesn't have " << Elements(1) << ", or has " << Elements(1)
-            << " that ";
-        matcher_describers_[0]->DescribeNegationTo(os);
-        return;
-      }
-      *os << "doesn't have " << Elements(matcher_describers_.size())
-          << ", or there exists no permutation of elements such that:\n";
-      break;
-    case UnorderedMatcherRequire::Superset:
-      *os << "no surjection from elements to requirements exists such that:\n";
-      break;
-    case UnorderedMatcherRequire::Subset:
-      *os << "no injection from elements to requirements exists such that:\n";
-      break;
-  }
-  const char* sep = "";
-  for (size_t i = 0; i != matcher_describers_.size(); ++i) {
-    *os << sep;
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      *os << " - element #" << i << " ";
-    } else {
-      *os << " - an element ";
-    }
-    matcher_describers_[i]->DescribeTo(os);
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      sep = ", and\n";
-    } else {
-      sep = "\n";
-    }
-  }
-}
-
-// Checks that all matchers match at least one element, and that all
-// elements match at least one matcher. This enables faster matching
-// and better error reporting.
-// Returns false, writing an explanation to 'listener', if and only
-// if the success criteria are not met.
-bool UnorderedElementsAreMatcherImplBase::VerifyMatchMatrix(
-    const ::std::vector<std::string>& element_printouts,
-    const MatchMatrix& matrix, MatchResultListener* listener) const {
-  bool result = true;
-  ::std::vector<char> element_matched(matrix.LhsSize(), 0);
-  ::std::vector<char> matcher_matched(matrix.RhsSize(), 0);
-
-  for (size_t ilhs = 0; ilhs < matrix.LhsSize(); ilhs++) {
-    for (size_t irhs = 0; irhs < matrix.RhsSize(); irhs++) {
-      char matched = matrix.HasEdge(ilhs, irhs);
-      element_matched[ilhs] |= matched;
-      matcher_matched[irhs] |= matched;
-    }
-  }
-
-  if (match_flags() & UnorderedMatcherRequire::Superset) {
-    const char* sep =
-        "where the following matchers don't match any elements:\n";
-    for (size_t mi = 0; mi < matcher_matched.size(); ++mi) {
-      if (matcher_matched[mi]) continue;
-      result = false;
-      if (listener->IsInterested()) {
-        *listener << sep << "matcher #" << mi << ": ";
-        matcher_describers_[mi]->DescribeTo(listener->stream());
-        sep = ",\n";
-      }
-    }
-  }
-
-  if (match_flags() & UnorderedMatcherRequire::Subset) {
-    const char* sep =
-        "where the following elements don't match any matchers:\n";
-    const char* outer_sep = "";
-    if (!result) {
-      outer_sep = "\nand ";
-    }
-    for (size_t ei = 0; ei < element_matched.size(); ++ei) {
-      if (element_matched[ei]) continue;
-      result = false;
-      if (listener->IsInterested()) {
-        *listener << outer_sep << sep << "element #" << ei << ": "
-                  << element_printouts[ei];
-        sep = ",\n";
-        outer_sep = "";
-      }
-    }
-  }
-  return result;
-}
-
-bool UnorderedElementsAreMatcherImplBase::FindPairing(
-    const MatchMatrix& matrix, MatchResultListener* listener) const {
-  ElementMatcherPairs matches = FindMaxBipartiteMatching(matrix);
-
-  size_t max_flow = matches.size();
-  if ((match_flags() & UnorderedMatcherRequire::Superset) &&
-      max_flow < matrix.RhsSize()) {
-    if (listener->IsInterested()) {
-      *listener << "where no permutation of the elements can satisfy all "
-                   "matchers, and the closest match is "
-                << max_flow << " of " << matrix.RhsSize()
-                << " matchers with the pairings:\n";
-      LogElementMatcherPairVec(matches, listener->stream());
-    }
-    return false;
-  }
-  if ((match_flags() & UnorderedMatcherRequire::Subset) &&
-      max_flow < matrix.LhsSize()) {
-    if (listener->IsInterested()) {
-      *listener
-          << "where not all elements can be matched, and the closest match is "
-          << max_flow << " of " << matrix.RhsSize()
-          << " matchers with the pairings:\n";
-      LogElementMatcherPairVec(matches, listener->stream());
-    }
-    return false;
-  }
-
-  if (matches.size() > 1) {
-    if (listener->IsInterested()) {
-      const char* sep = "where:\n";
-      for (size_t mi = 0; mi < matches.size(); ++mi) {
-        *listener << sep << " - element #" << matches[mi].first
-                  << " is matched by matcher #" << matches[mi].second;
-        sep = ",\n";
-      }
-    }
-  }
-  return true;
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/src/gmock-spec-builders.cc b/third_party/googletest/googlemock/src/gmock-spec-builders.cc
deleted file mode 100644
index c7266a3..0000000
--- a/third_party/googletest/googlemock/src/gmock-spec-builders.cc
+++ /dev/null
@@ -1,908 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements the spec builder syntax (ON_CALL and
-// EXPECT_CALL).
-
-#include "gmock/gmock-spec-builders.h"
-
-#include <stdlib.h>
-
-#include <iostream>  // NOLINT
-#include <map>
-#include <memory>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
-# include <unistd.h>  // NOLINT
-#endif
-
-// Silence C4800 (C4800: 'int *const ': forcing value
-// to bool 'true' or 'false') for MSVC 15
-#ifdef _MSC_VER
-#if _MSC_VER == 1900
-#  pragma warning(push)
-#  pragma warning(disable:4800)
-#endif
-#endif
-
-namespace testing {
-namespace internal {
-
-// Protects the mock object registry (in class Mock), all function
-// mockers, and all expectations.
-GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_gmock_mutex);
-
-// Logs a message including file and line number information.
-GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
-                                const char* file, int line,
-                                const std::string& message) {
-  ::std::ostringstream s;
-  s << internal::FormatFileLocation(file, line) << " " << message
-    << ::std::endl;
-  Log(severity, s.str(), 0);
-}
-
-// Constructs an ExpectationBase object.
-ExpectationBase::ExpectationBase(const char* a_file, int a_line,
-                                 const std::string& a_source_text)
-    : file_(a_file),
-      line_(a_line),
-      source_text_(a_source_text),
-      cardinality_specified_(false),
-      cardinality_(Exactly(1)),
-      call_count_(0),
-      retired_(false),
-      extra_matcher_specified_(false),
-      repeated_action_specified_(false),
-      retires_on_saturation_(false),
-      last_clause_(kNone),
-      action_count_checked_(false) {}
-
-// Destructs an ExpectationBase object.
-ExpectationBase::~ExpectationBase() {}
-
-// Explicitly specifies the cardinality of this expectation.  Used by
-// the subclasses to implement the .Times() clause.
-void ExpectationBase::SpecifyCardinality(const Cardinality& a_cardinality) {
-  cardinality_specified_ = true;
-  cardinality_ = a_cardinality;
-}
-
-// Retires all pre-requisites of this expectation.
-void ExpectationBase::RetireAllPreRequisites()
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  if (is_retired()) {
-    // We can take this short-cut as we never retire an expectation
-    // until we have retired all its pre-requisites.
-    return;
-  }
-
-  ::std::vector<ExpectationBase*> expectations(1, this);
-  while (!expectations.empty()) {
-    ExpectationBase* exp = expectations.back();
-    expectations.pop_back();
-
-    for (ExpectationSet::const_iterator it =
-             exp->immediate_prerequisites_.begin();
-         it != exp->immediate_prerequisites_.end(); ++it) {
-      ExpectationBase* next = it->expectation_base().get();
-      if (!next->is_retired()) {
-        next->Retire();
-        expectations.push_back(next);
-      }
-    }
-  }
-}
-
-// Returns true if and only if all pre-requisites of this expectation
-// have been satisfied.
-bool ExpectationBase::AllPrerequisitesAreSatisfied() const
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-  ::std::vector<const ExpectationBase*> expectations(1, this);
-  while (!expectations.empty()) {
-    const ExpectationBase* exp = expectations.back();
-    expectations.pop_back();
-
-    for (ExpectationSet::const_iterator it =
-             exp->immediate_prerequisites_.begin();
-         it != exp->immediate_prerequisites_.end(); ++it) {
-      const ExpectationBase* next = it->expectation_base().get();
-      if (!next->IsSatisfied()) return false;
-      expectations.push_back(next);
-    }
-  }
-  return true;
-}
-
-// Adds unsatisfied pre-requisites of this expectation to 'result'.
-void ExpectationBase::FindUnsatisfiedPrerequisites(ExpectationSet* result) const
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-  ::std::vector<const ExpectationBase*> expectations(1, this);
-  while (!expectations.empty()) {
-    const ExpectationBase* exp = expectations.back();
-    expectations.pop_back();
-
-    for (ExpectationSet::const_iterator it =
-             exp->immediate_prerequisites_.begin();
-         it != exp->immediate_prerequisites_.end(); ++it) {
-      const ExpectationBase* next = it->expectation_base().get();
-
-      if (next->IsSatisfied()) {
-        // If *it is satisfied and has a call count of 0, some of its
-        // pre-requisites may not be satisfied yet.
-        if (next->call_count_ == 0) {
-          expectations.push_back(next);
-        }
-      } else {
-        // Now that we know next is unsatisfied, we are not so interested
-        // in whether its pre-requisites are satisfied.  Therefore we
-        // don't iterate into it here.
-        *result += *it;
-      }
-    }
-  }
-}
-
-// Describes how many times a function call matching this
-// expectation has occurred.
-void ExpectationBase::DescribeCallCountTo(::std::ostream* os) const
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-
-  // Describes how many times the function is expected to be called.
-  *os << "         Expected: to be ";
-  cardinality().DescribeTo(os);
-  *os << "\n           Actual: ";
-  Cardinality::DescribeActualCallCountTo(call_count(), os);
-
-  // Describes the state of the expectation (e.g. is it satisfied?
-  // is it active?).
-  *os << " - " << (IsOverSaturated() ? "over-saturated" :
-                   IsSaturated() ? "saturated" :
-                   IsSatisfied() ? "satisfied" : "unsatisfied")
-      << " and "
-      << (is_retired() ? "retired" : "active");
-}
-
-// Checks the action count (i.e. the number of WillOnce() and
-// WillRepeatedly() clauses) against the cardinality if this hasn't
-// been done before.  Prints a warning if there are too many or too
-// few actions.
-void ExpectationBase::CheckActionCountIfNotDone() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  bool should_check = false;
-  {
-    MutexLock l(&mutex_);
-    if (!action_count_checked_) {
-      action_count_checked_ = true;
-      should_check = true;
-    }
-  }
-
-  if (should_check) {
-    if (!cardinality_specified_) {
-      // The cardinality was inferred - no need to check the action
-      // count against it.
-      return;
-    }
-
-    // The cardinality was explicitly specified.
-    const int action_count = static_cast<int>(untyped_actions_.size());
-    const int upper_bound = cardinality().ConservativeUpperBound();
-    const int lower_bound = cardinality().ConservativeLowerBound();
-    bool too_many;  // True if there are too many actions, or false
-    // if there are too few.
-    if (action_count > upper_bound ||
-        (action_count == upper_bound && repeated_action_specified_)) {
-      too_many = true;
-    } else if (0 < action_count && action_count < lower_bound &&
-               !repeated_action_specified_) {
-      too_many = false;
-    } else {
-      return;
-    }
-
-    ::std::stringstream ss;
-    DescribeLocationTo(&ss);
-    ss << "Too " << (too_many ? "many" : "few")
-       << " actions specified in " << source_text() << "...\n"
-       << "Expected to be ";
-    cardinality().DescribeTo(&ss);
-    ss << ", but has " << (too_many ? "" : "only ")
-       << action_count << " WillOnce()"
-       << (action_count == 1 ? "" : "s");
-    if (repeated_action_specified_) {
-      ss << " and a WillRepeatedly()";
-    }
-    ss << ".";
-    Log(kWarning, ss.str(), -1);  // -1 means "don't print stack trace".
-  }
-}
-
-// Implements the .Times() clause.
-void ExpectationBase::UntypedTimes(const Cardinality& a_cardinality) {
-  if (last_clause_ == kTimes) {
-    ExpectSpecProperty(false,
-                       ".Times() cannot appear "
-                       "more than once in an EXPECT_CALL().");
-  } else {
-    ExpectSpecProperty(last_clause_ < kTimes,
-                       ".Times() cannot appear after "
-                       ".InSequence(), .WillOnce(), .WillRepeatedly(), "
-                       "or .RetiresOnSaturation().");
-  }
-  last_clause_ = kTimes;
-
-  SpecifyCardinality(a_cardinality);
-}
-
-// Points to the implicit sequence introduced by a living InSequence
-// object (if any) in the current thread or NULL.
-GTEST_API_ ThreadLocal<Sequence*> g_gmock_implicit_sequence;
-
-// Reports an uninteresting call (whose description is in msg) in the
-// manner specified by 'reaction'.
-void ReportUninterestingCall(CallReaction reaction, const std::string& msg) {
-  // Include a stack trace only if --gmock_verbose=info is specified.
-  const int stack_frames_to_skip =
-      GMOCK_FLAG(verbose) == kInfoVerbosity ? 3 : -1;
-  switch (reaction) {
-    case kAllow:
-      Log(kInfo, msg, stack_frames_to_skip);
-      break;
-    case kWarn:
-      Log(kWarning,
-          msg +
-              "\nNOTE: You can safely ignore the above warning unless this "
-              "call should not happen.  Do not suppress it by blindly adding "
-              "an EXPECT_CALL() if you don't mean to enforce the call.  "
-              "See "
-              "https://github.com/google/googletest/blob/master/docs/"
-              "gmock_cook_book.md#"
-              "knowing-when-to-expect for details.\n",
-          stack_frames_to_skip);
-      break;
-    default:  // FAIL
-      Expect(false, nullptr, -1, msg);
-  }
-}
-
-UntypedFunctionMockerBase::UntypedFunctionMockerBase()
-    : mock_obj_(nullptr), name_("") {}
-
-UntypedFunctionMockerBase::~UntypedFunctionMockerBase() {}
-
-// Sets the mock object this mock method belongs to, and registers
-// this information in the global mock registry.  Will be called
-// whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
-// method.
-void UntypedFunctionMockerBase::RegisterOwner(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  {
-    MutexLock l(&g_gmock_mutex);
-    mock_obj_ = mock_obj;
-  }
-  Mock::Register(mock_obj, this);
-}
-
-// Sets the mock object this mock method belongs to, and sets the name
-// of the mock function.  Will be called upon each invocation of this
-// mock function.
-void UntypedFunctionMockerBase::SetOwnerAndName(const void* mock_obj,
-                                                const char* name)
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  // We protect name_ under g_gmock_mutex in case this mock function
-  // is called from two threads concurrently.
-  MutexLock l(&g_gmock_mutex);
-  mock_obj_ = mock_obj;
-  name_ = name;
-}
-
-// Returns the name of the function being mocked.  Must be called
-// after RegisterOwner() or SetOwnerAndName() has been called.
-const void* UntypedFunctionMockerBase::MockObject() const
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  const void* mock_obj;
-  {
-    // We protect mock_obj_ under g_gmock_mutex in case this mock
-    // function is called from two threads concurrently.
-    MutexLock l(&g_gmock_mutex);
-    Assert(mock_obj_ != nullptr, __FILE__, __LINE__,
-           "MockObject() must not be called before RegisterOwner() or "
-           "SetOwnerAndName() has been called.");
-    mock_obj = mock_obj_;
-  }
-  return mock_obj;
-}
-
-// Returns the name of this mock method.  Must be called after
-// SetOwnerAndName() has been called.
-const char* UntypedFunctionMockerBase::Name() const
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  const char* name;
-  {
-    // We protect name_ under g_gmock_mutex in case this mock
-    // function is called from two threads concurrently.
-    MutexLock l(&g_gmock_mutex);
-    Assert(name_ != nullptr, __FILE__, __LINE__,
-           "Name() must not be called before SetOwnerAndName() has "
-           "been called.");
-    name = name_;
-  }
-  return name;
-}
-
-// Calculates the result of invoking this mock function with the given
-// arguments, prints it, and returns it.  The caller is responsible
-// for deleting the result.
-UntypedActionResultHolderBase* UntypedFunctionMockerBase::UntypedInvokeWith(
-    void* const untyped_args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  // See the definition of untyped_expectations_ for why access to it
-  // is unprotected here.
-  if (untyped_expectations_.size() == 0) {
-    // No expectation is set on this mock method - we have an
-    // uninteresting call.
-
-    // We must get Google Mock's reaction on uninteresting calls
-    // made on this mock object BEFORE performing the action,
-    // because the action may DELETE the mock object and make the
-    // following expression meaningless.
-    const CallReaction reaction =
-        Mock::GetReactionOnUninterestingCalls(MockObject());
-
-    // True if and only if we need to print this call's arguments and return
-    // value.  This definition must be kept in sync with
-    // the behavior of ReportUninterestingCall().
-    const bool need_to_report_uninteresting_call =
-        // If the user allows this uninteresting call, we print it
-        // only when they want informational messages.
-        reaction == kAllow ? LogIsVisible(kInfo) :
-                           // If the user wants this to be a warning, we print
-                           // it only when they want to see warnings.
-            reaction == kWarn
-                ? LogIsVisible(kWarning)
-                :
-                // Otherwise, the user wants this to be an error, and we
-                // should always print detailed information in the error.
-                true;
-
-    if (!need_to_report_uninteresting_call) {
-      // Perform the action without printing the call information.
-      return this->UntypedPerformDefaultAction(
-          untyped_args, "Function call: " + std::string(Name()));
-    }
-
-    // Warns about the uninteresting call.
-    ::std::stringstream ss;
-    this->UntypedDescribeUninterestingCall(untyped_args, &ss);
-
-    // Calculates the function result.
-    UntypedActionResultHolderBase* const result =
-        this->UntypedPerformDefaultAction(untyped_args, ss.str());
-
-    // Prints the function result.
-    if (result != nullptr) result->PrintAsActionResult(&ss);
-
-    ReportUninterestingCall(reaction, ss.str());
-    return result;
-  }
-
-  bool is_excessive = false;
-  ::std::stringstream ss;
-  ::std::stringstream why;
-  ::std::stringstream loc;
-  const void* untyped_action = nullptr;
-
-  // The UntypedFindMatchingExpectation() function acquires and
-  // releases g_gmock_mutex.
-
-  const ExpectationBase* const untyped_expectation =
-      this->UntypedFindMatchingExpectation(untyped_args, &untyped_action,
-                                           &is_excessive, &ss, &why);
-  const bool found = untyped_expectation != nullptr;
-
-  // True if and only if we need to print the call's arguments
-  // and return value.
-  // This definition must be kept in sync with the uses of Expect()
-  // and Log() in this function.
-  const bool need_to_report_call =
-      !found || is_excessive || LogIsVisible(kInfo);
-  if (!need_to_report_call) {
-    // Perform the action without printing the call information.
-    return untyped_action == nullptr
-               ? this->UntypedPerformDefaultAction(untyped_args, "")
-               : this->UntypedPerformAction(untyped_action, untyped_args);
-  }
-
-  ss << "    Function call: " << Name();
-  this->UntypedPrintArgs(untyped_args, &ss);
-
-  // In case the action deletes a piece of the expectation, we
-  // generate the message beforehand.
-  if (found && !is_excessive) {
-    untyped_expectation->DescribeLocationTo(&loc);
-  }
-
-  UntypedActionResultHolderBase* result = nullptr;
-
-  auto perform_action = [&] {
-    return untyped_action == nullptr
-               ? this->UntypedPerformDefaultAction(untyped_args, ss.str())
-               : this->UntypedPerformAction(untyped_action, untyped_args);
-  };
-  auto handle_failures = [&] {
-    ss << "\n" << why.str();
-
-    if (!found) {
-      // No expectation matches this call - reports a failure.
-      Expect(false, nullptr, -1, ss.str());
-    } else if (is_excessive) {
-      // We had an upper-bound violation and the failure message is in ss.
-      Expect(false, untyped_expectation->file(), untyped_expectation->line(),
-             ss.str());
-    } else {
-      // We had an expected call and the matching expectation is
-      // described in ss.
-      Log(kInfo, loc.str() + ss.str(), 2);
-    }
-  };
-#if GTEST_HAS_EXCEPTIONS
-  try {
-    result = perform_action();
-  } catch (...) {
-    handle_failures();
-    throw;
-  }
-#else
-  result = perform_action();
-#endif
-
-  if (result != nullptr) result->PrintAsActionResult(&ss);
-  handle_failures();
-  return result;
-}
-
-// Returns an Expectation object that references and co-owns exp,
-// which must be an expectation on this mock function.
-Expectation UntypedFunctionMockerBase::GetHandleOf(ExpectationBase* exp) {
-  // See the definition of untyped_expectations_ for why access to it
-  // is unprotected here.
-  for (UntypedExpectations::const_iterator it =
-           untyped_expectations_.begin();
-       it != untyped_expectations_.end(); ++it) {
-    if (it->get() == exp) {
-      return Expectation(*it);
-    }
-  }
-
-  Assert(false, __FILE__, __LINE__, "Cannot find expectation.");
-  return Expectation();
-  // The above statement is just to make the code compile, and will
-  // never be executed.
-}
-
-// Verifies that all expectations on this mock function have been
-// satisfied.  Reports one or more Google Test non-fatal failures
-// and returns false if not.
-bool UntypedFunctionMockerBase::VerifyAndClearExpectationsLocked()
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-  bool expectations_met = true;
-  for (UntypedExpectations::const_iterator it =
-           untyped_expectations_.begin();
-       it != untyped_expectations_.end(); ++it) {
-    ExpectationBase* const untyped_expectation = it->get();
-    if (untyped_expectation->IsOverSaturated()) {
-      // There was an upper-bound violation.  Since the error was
-      // already reported when it occurred, there is no need to do
-      // anything here.
-      expectations_met = false;
-    } else if (!untyped_expectation->IsSatisfied()) {
-      expectations_met = false;
-      ::std::stringstream ss;
-      ss  << "Actual function call count doesn't match "
-          << untyped_expectation->source_text() << "...\n";
-      // No need to show the source file location of the expectation
-      // in the description, as the Expect() call that follows already
-      // takes care of it.
-      untyped_expectation->MaybeDescribeExtraMatcherTo(&ss);
-      untyped_expectation->DescribeCallCountTo(&ss);
-      Expect(false, untyped_expectation->file(),
-             untyped_expectation->line(), ss.str());
-    }
-  }
-
-  // Deleting our expectations may trigger other mock objects to be deleted, for
-  // example if an action contains a reference counted smart pointer to that
-  // mock object, and that is the last reference. So if we delete our
-  // expectations within the context of the global mutex we may deadlock when
-  // this method is called again. Instead, make a copy of the set of
-  // expectations to delete, clear our set within the mutex, and then clear the
-  // copied set outside of it.
-  UntypedExpectations expectations_to_delete;
-  untyped_expectations_.swap(expectations_to_delete);
-
-  g_gmock_mutex.Unlock();
-  expectations_to_delete.clear();
-  g_gmock_mutex.Lock();
-
-  return expectations_met;
-}
-
-CallReaction intToCallReaction(int mock_behavior) {
-  if (mock_behavior >= kAllow && mock_behavior <= kFail) {
-    return static_cast<internal::CallReaction>(mock_behavior);
-  }
-  return kWarn;
-}
-
-}  // namespace internal
-
-// Class Mock.
-
-namespace {
-
-typedef std::set<internal::UntypedFunctionMockerBase*> FunctionMockers;
-
-// The current state of a mock object.  Such information is needed for
-// detecting leaked mock objects and explicitly verifying a mock's
-// expectations.
-struct MockObjectState {
-  MockObjectState()
-      : first_used_file(nullptr), first_used_line(-1), leakable(false) {}
-
-  // Where in the source file an ON_CALL or EXPECT_CALL is first
-  // invoked on this mock object.
-  const char* first_used_file;
-  int first_used_line;
-  ::std::string first_used_test_suite;
-  ::std::string first_used_test;
-  bool leakable;  // true if and only if it's OK to leak the object.
-  FunctionMockers function_mockers;  // All registered methods of the object.
-};
-
-// A global registry holding the state of all mock objects that are
-// alive.  A mock object is added to this registry the first time
-// Mock::AllowLeak(), ON_CALL(), or EXPECT_CALL() is called on it.  It
-// is removed from the registry in the mock object's destructor.
-class MockObjectRegistry {
- public:
-  // Maps a mock object (identified by its address) to its state.
-  typedef std::map<const void*, MockObjectState> StateMap;
-
-  // This destructor will be called when a program exits, after all
-  // tests in it have been run.  By then, there should be no mock
-  // object alive.  Therefore we report any living object as test
-  // failure, unless the user explicitly asked us to ignore it.
-  ~MockObjectRegistry() {
-    if (!GMOCK_FLAG(catch_leaked_mocks))
-      return;
-
-    int leaked_count = 0;
-    for (StateMap::const_iterator it = states_.begin(); it != states_.end();
-         ++it) {
-      if (it->second.leakable)  // The user said it's fine to leak this object.
-        continue;
-
-      // FIXME: Print the type of the leaked object.
-      // This can help the user identify the leaked object.
-      std::cout << "\n";
-      const MockObjectState& state = it->second;
-      std::cout << internal::FormatFileLocation(state.first_used_file,
-                                                state.first_used_line);
-      std::cout << " ERROR: this mock object";
-      if (state.first_used_test != "") {
-        std::cout << " (used in test " << state.first_used_test_suite << "."
-                  << state.first_used_test << ")";
-      }
-      std::cout << " should be deleted but never is. Its address is @"
-           << it->first << ".";
-      leaked_count++;
-    }
-    if (leaked_count > 0) {
-      std::cout << "\nERROR: " << leaked_count << " leaked mock "
-                << (leaked_count == 1 ? "object" : "objects")
-                << " found at program exit. Expectations on a mock object are "
-                   "verified when the object is destructed. Leaking a mock "
-                   "means that its expectations aren't verified, which is "
-                   "usually a test bug. If you really intend to leak a mock, "
-                   "you can suppress this error using "
-                   "testing::Mock::AllowLeak(mock_object), or you may use a "
-                   "fake or stub instead of a mock.\n";
-      std::cout.flush();
-      ::std::cerr.flush();
-      // RUN_ALL_TESTS() has already returned when this destructor is
-      // called.  Therefore we cannot use the normal Google Test
-      // failure reporting mechanism.
-      _exit(1);  // We cannot call exit() as it is not reentrant and
-                 // may already have been called.
-    }
-  }
-
-  StateMap& states() { return states_; }
-
- private:
-  StateMap states_;
-};
-
-// Protected by g_gmock_mutex.
-MockObjectRegistry g_mock_object_registry;
-
-// Maps a mock object to the reaction Google Mock should have when an
-// uninteresting method is called.  Protected by g_gmock_mutex.
-std::map<const void*, internal::CallReaction> g_uninteresting_call_reaction;
-
-// Sets the reaction Google Mock should have when an uninteresting
-// method of the given mock object is called.
-void SetReactionOnUninterestingCalls(const void* mock_obj,
-                                     internal::CallReaction reaction)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_uninteresting_call_reaction[mock_obj] = reaction;
-}
-
-}  // namespace
-
-// Tells Google Mock to allow uninteresting calls on the given mock
-// object.
-void Mock::AllowUninterestingCalls(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  SetReactionOnUninterestingCalls(mock_obj, internal::kAllow);
-}
-
-// Tells Google Mock to warn the user about uninteresting calls on the
-// given mock object.
-void Mock::WarnUninterestingCalls(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  SetReactionOnUninterestingCalls(mock_obj, internal::kWarn);
-}
-
-// Tells Google Mock to fail uninteresting calls on the given mock
-// object.
-void Mock::FailUninterestingCalls(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  SetReactionOnUninterestingCalls(mock_obj, internal::kFail);
-}
-
-// Tells Google Mock the given mock object is being destroyed and its
-// entry in the call-reaction table should be removed.
-void Mock::UnregisterCallReaction(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_uninteresting_call_reaction.erase(mock_obj);
-}
-
-// Returns the reaction Google Mock will have on uninteresting calls
-// made on the given mock object.
-internal::CallReaction Mock::GetReactionOnUninterestingCalls(
-    const void* mock_obj)
-        GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  return (g_uninteresting_call_reaction.count(mock_obj) == 0) ?
-      internal::intToCallReaction(GMOCK_FLAG(default_mock_behavior)) :
-      g_uninteresting_call_reaction[mock_obj];
-}
-
-// Tells Google Mock to ignore mock_obj when checking for leaked mock
-// objects.
-void Mock::AllowLeak(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_mock_object_registry.states()[mock_obj].leakable = true;
-}
-
-// Verifies and clears all expectations on the given mock object.  If
-// the expectations aren't satisfied, generates one or more Google
-// Test non-fatal failures and returns false.
-bool Mock::VerifyAndClearExpectations(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  return VerifyAndClearExpectationsLocked(mock_obj);
-}
-
-// Verifies all expectations on the given mock object and clears its
-// default actions and expectations.  Returns true if and only if the
-// verification was successful.
-bool Mock::VerifyAndClear(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  ClearDefaultActionsLocked(mock_obj);
-  return VerifyAndClearExpectationsLocked(mock_obj);
-}
-
-// Verifies and clears all expectations on the given mock object.  If
-// the expectations aren't satisfied, generates one or more Google
-// Test non-fatal failures and returns false.
-bool Mock::VerifyAndClearExpectationsLocked(void* mock_obj)
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
-  internal::g_gmock_mutex.AssertHeld();
-  if (g_mock_object_registry.states().count(mock_obj) == 0) {
-    // No EXPECT_CALL() was set on the given mock object.
-    return true;
-  }
-
-  // Verifies and clears the expectations on each mock method in the
-  // given mock object.
-  bool expectations_met = true;
-  FunctionMockers& mockers =
-      g_mock_object_registry.states()[mock_obj].function_mockers;
-  for (FunctionMockers::const_iterator it = mockers.begin();
-       it != mockers.end(); ++it) {
-    if (!(*it)->VerifyAndClearExpectationsLocked()) {
-      expectations_met = false;
-    }
-  }
-
-  // We don't clear the content of mockers, as they may still be
-  // needed by ClearDefaultActionsLocked().
-  return expectations_met;
-}
-
-bool Mock::IsNaggy(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kWarn;
-}
-bool Mock::IsNice(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kAllow;
-}
-bool Mock::IsStrict(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kFail;
-}
-
-// Registers a mock object and a mock method it owns.
-void Mock::Register(const void* mock_obj,
-                    internal::UntypedFunctionMockerBase* mocker)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_mock_object_registry.states()[mock_obj].function_mockers.insert(mocker);
-}
-
-// Tells Google Mock where in the source code mock_obj is used in an
-// ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
-// information helps the user identify which object it is.
-void Mock::RegisterUseByOnCallOrExpectCall(const void* mock_obj,
-                                           const char* file, int line)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  MockObjectState& state = g_mock_object_registry.states()[mock_obj];
-  if (state.first_used_file == nullptr) {
-    state.first_used_file = file;
-    state.first_used_line = line;
-    const TestInfo* const test_info =
-        UnitTest::GetInstance()->current_test_info();
-    if (test_info != nullptr) {
-      state.first_used_test_suite = test_info->test_suite_name();
-      state.first_used_test = test_info->name();
-    }
-  }
-}
-
-// Unregisters a mock method; removes the owning mock object from the
-// registry when the last mock method associated with it has been
-// unregistered.  This is called only in the destructor of
-// FunctionMockerBase.
-void Mock::UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
-  internal::g_gmock_mutex.AssertHeld();
-  for (MockObjectRegistry::StateMap::iterator it =
-           g_mock_object_registry.states().begin();
-       it != g_mock_object_registry.states().end(); ++it) {
-    FunctionMockers& mockers = it->second.function_mockers;
-    if (mockers.erase(mocker) > 0) {
-      // mocker was in mockers and has been just removed.
-      if (mockers.empty()) {
-        g_mock_object_registry.states().erase(it);
-      }
-      return;
-    }
-  }
-}
-
-// Clears all ON_CALL()s set on the given mock object.
-void Mock::ClearDefaultActionsLocked(void* mock_obj)
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
-  internal::g_gmock_mutex.AssertHeld();
-
-  if (g_mock_object_registry.states().count(mock_obj) == 0) {
-    // No ON_CALL() was set on the given mock object.
-    return;
-  }
-
-  // Clears the default actions for each mock method in the given mock
-  // object.
-  FunctionMockers& mockers =
-      g_mock_object_registry.states()[mock_obj].function_mockers;
-  for (FunctionMockers::const_iterator it = mockers.begin();
-       it != mockers.end(); ++it) {
-    (*it)->ClearDefaultActionsLocked();
-  }
-
-  // We don't clear the content of mockers, as they may still be
-  // needed by VerifyAndClearExpectationsLocked().
-}
-
-Expectation::Expectation() {}
-
-Expectation::Expectation(
-    const std::shared_ptr<internal::ExpectationBase>& an_expectation_base)
-    : expectation_base_(an_expectation_base) {}
-
-Expectation::~Expectation() {}
-
-// Adds an expectation to a sequence.
-void Sequence::AddExpectation(const Expectation& expectation) const {
-  if (*last_expectation_ != expectation) {
-    if (last_expectation_->expectation_base() != nullptr) {
-      expectation.expectation_base()->immediate_prerequisites_
-          += *last_expectation_;
-    }
-    *last_expectation_ = expectation;
-  }
-}
-
-// Creates the implicit sequence if there isn't one.
-InSequence::InSequence() {
-  if (internal::g_gmock_implicit_sequence.get() == nullptr) {
-    internal::g_gmock_implicit_sequence.set(new Sequence);
-    sequence_created_ = true;
-  } else {
-    sequence_created_ = false;
-  }
-}
-
-// Deletes the implicit sequence if it was created by the constructor
-// of this object.
-InSequence::~InSequence() {
-  if (sequence_created_) {
-    delete internal::g_gmock_implicit_sequence.get();
-    internal::g_gmock_implicit_sequence.set(nullptr);
-  }
-}
-
-}  // namespace testing
-
-#ifdef _MSC_VER
-#if _MSC_VER == 1900
-#  pragma warning(pop)
-#endif
-#endif
diff --git a/third_party/googletest/googlemock/src/gmock.cc b/third_party/googletest/googlemock/src/gmock.cc
deleted file mode 100644
index 7bcdb0b..0000000
--- a/third_party/googletest/googlemock/src/gmock.cc
+++ /dev/null
@@ -1,213 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gmock/gmock.h"
-#include "gmock/internal/gmock-port.h"
-
-namespace testing {
-
-GMOCK_DEFINE_bool_(catch_leaked_mocks, true,
-                   "true if and only if Google Mock should report leaked "
-                   "mock objects as failures.");
-
-GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,
-                     "Controls how verbose Google Mock's output is."
-                     "  Valid values:\n"
-                     "  info    - prints all messages.\n"
-                     "  warning - prints warnings and errors.\n"
-                     "  error   - prints errors only.");
-
-GMOCK_DEFINE_int32_(default_mock_behavior, 1,
-                    "Controls the default behavior of mocks."
-                    "  Valid values:\n"
-                    "  0 - by default, mocks act as NiceMocks.\n"
-                    "  1 - by default, mocks act as NaggyMocks.\n"
-                    "  2 - by default, mocks act as StrictMocks.");
-
-namespace internal {
-
-// Parses a string as a command line flag.  The string should have the
-// format "--gmock_flag=value".  When def_optional is true, the
-// "=value" part can be omitted.
-//
-// Returns the value of the flag, or NULL if the parsing failed.
-static const char* ParseGoogleMockFlagValue(const char* str,
-                                            const char* flag,
-                                            bool def_optional) {
-  // str and flag must not be NULL.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--gmock_".
-  const std::string flag_str = std::string("--gmock_") + flag;
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) {
-    return flag_end;
-  }
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-// Parses a string for a Google Mock bool flag, in the form of
-// "--gmock_flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,
-                                    bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
-  return true;
-}
-
-// Parses a string for a Google Mock string flag, in the form of
-// "--gmock_flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-template <typename String>
-static bool ParseGoogleMockStringFlag(const char* str, const char* flag,
-                                      String* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  *value = value_str;
-  return true;
-}
-
-static bool ParseGoogleMockIntFlag(const char* str, const char* flag,
-                                   int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(Message() << "The value of flag --" << flag,
-                    value_str, value);
-}
-
-// The internal implementation of InitGoogleMock().
-//
-// The type parameter CharType can be instantiated to either char or
-// wchar_t.
-template <typename CharType>
-void InitGoogleMockImpl(int* argc, CharType** argv) {
-  // Makes sure Google Test is initialized.  InitGoogleTest() is
-  // idempotent, so it's fine if the user has already called it.
-  InitGoogleTest(argc, argv);
-  if (*argc <= 0) return;
-
-  for (int i = 1; i != *argc; i++) {
-    const std::string arg_string = StreamableToString(argv[i]);
-    const char* const arg = arg_string.c_str();
-
-    // Do we see a Google Mock flag?
-    if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",
-                                &GMOCK_FLAG(catch_leaked_mocks)) ||
-        ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose)) ||
-        ParseGoogleMockIntFlag(arg, "default_mock_behavior",
-                               &GMOCK_FLAG(default_mock_behavior))) {
-      // Yes.  Shift the remainder of the argv list left by one.  Note
-      // that argv has (*argc + 1) elements, the last one always being
-      // NULL.  The following loop moves the trailing NULL element as
-      // well.
-      for (int j = i; j != *argc; j++) {
-        argv[j] = argv[j + 1];
-      }
-
-      // Decrements the argument count.
-      (*argc)--;
-
-      // We also need to decrement the iterator as we just removed
-      // an element.
-      i--;
-    }
-  }
-}
-
-}  // namespace internal
-
-// Initializes Google Mock.  This must be called before running the
-// tests.  In particular, it parses a command line for the flags that
-// Google Mock recognizes.  Whenever a Google Mock flag is seen, it is
-// removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Mock flag variables are
-// updated.
-//
-// Since Google Test is needed for Google Mock to work, this function
-// also initializes Google Test and parses its flags, if that hasn't
-// been done.
-GTEST_API_ void InitGoogleMock(int* argc, char** argv) {
-  internal::InitGoogleMockImpl(argc, argv);
-}
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {
-  internal::InitGoogleMockImpl(argc, argv);
-}
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleMock() {
-  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
-  int argc = 1;
-  const auto arg0 = "dummy";
-  char* argv0 = const_cast<char*>(arg0);
-  char** argv = &argv0;
-
-  internal::InitGoogleMockImpl(&argc, argv);
-}
-
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/src/gmock_main.cc b/third_party/googletest/googlemock/src/gmock_main.cc
deleted file mode 100644
index 18c500f..0000000
--- a/third_party/googletest/googlemock/src/gmock_main.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include <iostream>
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-#if GTEST_OS_ESP8266 || GTEST_OS_ESP32
-#if GTEST_OS_ESP8266
-extern "C" {
-#endif
-void setup() {
-  // Since Google Mock depends on Google Test, InitGoogleMock() is
-  // also responsible for initializing Google Test.  Therefore there's
-  // no need for calling testing::InitGoogleTest() separately.
-  testing::InitGoogleMock();
-}
-void loop() { RUN_ALL_TESTS(); }
-#if GTEST_OS_ESP8266
-}
-#endif
-
-#else
-
-// MS C++ compiler/linker has a bug on Windows (not on Windows CE), which
-// causes a link error when _tmain is defined in a static library and UNICODE
-// is enabled. For this reason instead of _tmain, main function is used on
-// Windows. See the following link to track the current status of this bug:
-// https://web.archive.org/web/20170912203238/connect.microsoft.com/VisualStudio/feedback/details/394464/wmain-link-error-in-the-static-library
-// // NOLINT
-#if GTEST_OS_WINDOWS_MOBILE
-# include <tchar.h>  // NOLINT
-
-GTEST_API_ int _tmain(int argc, TCHAR** argv) {
-#else
-GTEST_API_ int main(int argc, char** argv) {
-#endif  // GTEST_OS_WINDOWS_MOBILE
-  std::cout << "Running main() from gmock_main.cc\n";
-  // Since Google Mock depends on Google Test, InitGoogleMock() is
-  // also responsible for initializing Google Test.  Therefore there's
-  // no need for calling testing::InitGoogleTest() separately.
-  testing::InitGoogleMock(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif
diff --git a/third_party/googletest/googlemock/test/BUILD.bazel b/third_party/googletest/googlemock/test/BUILD.bazel
deleted file mode 100644
index 882a423..0000000
--- a/third_party/googletest/googlemock/test/BUILD.bazel
+++ /dev/null
@@ -1,122 +0,0 @@
-# Copyright 2017 Google Inc.
-# All Rights Reserved.
-#
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-#   Bazel Build for Google C++ Testing Framework(Google Test)-googlemock
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_test")
-load("@rules_python//python:defs.bzl", "py_library", "py_test")
-
-licenses(["notice"])
-
-# Tests for GMock itself
-cc_test(
-    name = "gmock_all_test",
-    size = "small",
-    srcs = glob(include = ["gmock-*.cc"]),
-    copts = [
-        "-Wno-unused-parameter",
-        "-Wno-unused-function",
-    ],
-    linkopts = select({
-        "//:windows": [],
-        "//conditions:default": [],
-    }),
-    deps = ["//:gtest"],
-)
-
-# Python tests
-py_library(
-    name = "gmock_test_utils",
-    testonly = 1,
-    srcs = ["gmock_test_utils.py"],
-    deps = [
-        "//googletest/test:gtest_test_utils",
-    ],
-)
-
-cc_binary(
-    name = "gmock_leak_test_",
-    testonly = 1,
-    srcs = ["gmock_leak_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gmock_leak_test",
-    size = "medium",
-    srcs = ["gmock_leak_test.py"],
-    data = [
-        ":gmock_leak_test_",
-        ":gmock_test_utils",
-    ],
-    tags = [
-        "no_test_msvc2015",
-        "no_test_msvc2017",
-    ],
-)
-
-cc_test(
-    name = "gmock_link_test",
-    size = "small",
-    srcs = [
-        "gmock_link2_test.cc",
-        "gmock_link_test.cc",
-        "gmock_link_test.h",
-    ],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "gmock_output_test_",
-    srcs = ["gmock_output_test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "gmock_output_test",
-    size = "medium",
-    srcs = ["gmock_output_test.py"],
-    data = [
-        ":gmock_output_test_",
-        ":gmock_output_test_golden.txt",
-    ],
-    tags = [
-        "no_test_msvc2015",
-        "no_test_msvc2017",
-    ],
-    deps = [":gmock_test_utils"],
-)
-
-cc_test(
-    name = "gmock_test",
-    size = "small",
-    srcs = ["gmock_test.cc"],
-    deps = ["//:gtest_main"],
-)
diff --git a/third_party/googletest/googlemock/test/gmock-actions_test.cc b/third_party/googletest/googlemock/test/gmock-actions_test.cc
deleted file mode 100644
index e1ca7fe..0000000
--- a/third_party/googletest/googlemock/test/gmock-actions_test.cc
+++ /dev/null
@@ -1,1583 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the built-in actions.
-
-// Silence C4100 (unreferenced formal parameter) for MSVC
-#ifdef _MSC_VER
-#  pragma warning(push)
-#  pragma warning(disable:4100)
-#if _MSC_VER == 1900
-// and silence C4800 (C4800: 'int *const ': forcing value
-// to bool 'true' or 'false') for MSVC 15
-#  pragma warning(disable:4800)
-#endif
-#endif
-
-#include "gmock/gmock-actions.h"
-#include <algorithm>
-#include <iterator>
-#include <memory>
-#include <string>
-#include <type_traits>
-#include "gmock/gmock.h"
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-namespace {
-
-using ::testing::_;
-using ::testing::Action;
-using ::testing::ActionInterface;
-using ::testing::Assign;
-using ::testing::ByMove;
-using ::testing::ByRef;
-using ::testing::DefaultValue;
-using ::testing::DoAll;
-using ::testing::DoDefault;
-using ::testing::IgnoreResult;
-using ::testing::Invoke;
-using ::testing::InvokeWithoutArgs;
-using ::testing::MakePolymorphicAction;
-using ::testing::PolymorphicAction;
-using ::testing::Return;
-using ::testing::ReturnNew;
-using ::testing::ReturnNull;
-using ::testing::ReturnRef;
-using ::testing::ReturnRefOfCopy;
-using ::testing::ReturnRoundRobin;
-using ::testing::SetArgPointee;
-using ::testing::SetArgumentPointee;
-using ::testing::Unused;
-using ::testing::WithArgs;
-using ::testing::internal::BuiltInDefaultValue;
-
-#if !GTEST_OS_WINDOWS_MOBILE
-using ::testing::SetErrnoAndReturn;
-#endif
-
-// Tests that BuiltInDefaultValue<T*>::Get() returns NULL.
-TEST(BuiltInDefaultValueTest, IsNullForPointerTypes) {
-  EXPECT_TRUE(BuiltInDefaultValue<int*>::Get() == nullptr);
-  EXPECT_TRUE(BuiltInDefaultValue<const char*>::Get() == nullptr);
-  EXPECT_TRUE(BuiltInDefaultValue<void*>::Get() == nullptr);
-}
-
-// Tests that BuiltInDefaultValue<T*>::Exists() return true.
-TEST(BuiltInDefaultValueTest, ExistsForPointerTypes) {
-  EXPECT_TRUE(BuiltInDefaultValue<int*>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<const char*>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<void*>::Exists());
-}
-
-// Tests that BuiltInDefaultValue<T>::Get() returns 0 when T is a
-// built-in numeric type.
-TEST(BuiltInDefaultValueTest, IsZeroForNumericTypes) {
-  EXPECT_EQ(0U, BuiltInDefaultValue<unsigned char>::Get());
-  EXPECT_EQ(0, BuiltInDefaultValue<signed char>::Get());
-  EXPECT_EQ(0, BuiltInDefaultValue<char>::Get());
-#if GMOCK_WCHAR_T_IS_NATIVE_
-#if !defined(__WCHAR_UNSIGNED__)
-  EXPECT_EQ(0, BuiltInDefaultValue<wchar_t>::Get());
-#else
-  EXPECT_EQ(0U, BuiltInDefaultValue<wchar_t>::Get());
-#endif
-#endif
-  EXPECT_EQ(0U, BuiltInDefaultValue<unsigned short>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<signed short>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<short>::Get());  // NOLINT
-  EXPECT_EQ(0U, BuiltInDefaultValue<unsigned int>::Get());
-  EXPECT_EQ(0, BuiltInDefaultValue<signed int>::Get());
-  EXPECT_EQ(0, BuiltInDefaultValue<int>::Get());
-  EXPECT_EQ(0U, BuiltInDefaultValue<unsigned long>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<signed long>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<long>::Get());  // NOLINT
-  EXPECT_EQ(0U, BuiltInDefaultValue<unsigned long long>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<signed long long>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<long long>::Get());  // NOLINT
-  EXPECT_EQ(0, BuiltInDefaultValue<float>::Get());
-  EXPECT_EQ(0, BuiltInDefaultValue<double>::Get());
-}
-
-// Tests that BuiltInDefaultValue<T>::Exists() returns true when T is a
-// built-in numeric type.
-TEST(BuiltInDefaultValueTest, ExistsForNumericTypes) {
-  EXPECT_TRUE(BuiltInDefaultValue<unsigned char>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<signed char>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<char>::Exists());
-#if GMOCK_WCHAR_T_IS_NATIVE_
-  EXPECT_TRUE(BuiltInDefaultValue<wchar_t>::Exists());
-#endif
-  EXPECT_TRUE(BuiltInDefaultValue<unsigned short>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<signed short>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<short>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<unsigned int>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<signed int>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<int>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<unsigned long>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<signed long>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<long>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<unsigned long long>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<signed long long>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<long long>::Exists());  // NOLINT
-  EXPECT_TRUE(BuiltInDefaultValue<float>::Exists());
-  EXPECT_TRUE(BuiltInDefaultValue<double>::Exists());
-}
-
-// Tests that BuiltInDefaultValue<bool>::Get() returns false.
-TEST(BuiltInDefaultValueTest, IsFalseForBool) {
-  EXPECT_FALSE(BuiltInDefaultValue<bool>::Get());
-}
-
-// Tests that BuiltInDefaultValue<bool>::Exists() returns true.
-TEST(BuiltInDefaultValueTest, BoolExists) {
-  EXPECT_TRUE(BuiltInDefaultValue<bool>::Exists());
-}
-
-// Tests that BuiltInDefaultValue<T>::Get() returns "" when T is a
-// string type.
-TEST(BuiltInDefaultValueTest, IsEmptyStringForString) {
-  EXPECT_EQ("", BuiltInDefaultValue< ::std::string>::Get());
-}
-
-// Tests that BuiltInDefaultValue<T>::Exists() returns true when T is a
-// string type.
-TEST(BuiltInDefaultValueTest, ExistsForString) {
-  EXPECT_TRUE(BuiltInDefaultValue< ::std::string>::Exists());
-}
-
-// Tests that BuiltInDefaultValue<const T>::Get() returns the same
-// value as BuiltInDefaultValue<T>::Get() does.
-TEST(BuiltInDefaultValueTest, WorksForConstTypes) {
-  EXPECT_EQ("", BuiltInDefaultValue<const std::string>::Get());
-  EXPECT_EQ(0, BuiltInDefaultValue<const int>::Get());
-  EXPECT_TRUE(BuiltInDefaultValue<char* const>::Get() == nullptr);
-  EXPECT_FALSE(BuiltInDefaultValue<const bool>::Get());
-}
-
-// A type that's default constructible.
-class MyDefaultConstructible {
- public:
-  MyDefaultConstructible() : value_(42) {}
-
-  int value() const { return value_; }
-
- private:
-  int value_;
-};
-
-// A type that's not default constructible.
-class MyNonDefaultConstructible {
- public:
-  // Does not have a default ctor.
-  explicit MyNonDefaultConstructible(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
-
- private:
-  int value_;
-};
-
-
-TEST(BuiltInDefaultValueTest, ExistsForDefaultConstructibleType) {
-  EXPECT_TRUE(BuiltInDefaultValue<MyDefaultConstructible>::Exists());
-}
-
-TEST(BuiltInDefaultValueTest, IsDefaultConstructedForDefaultConstructibleType) {
-  EXPECT_EQ(42, BuiltInDefaultValue<MyDefaultConstructible>::Get().value());
-}
-
-
-TEST(BuiltInDefaultValueTest, DoesNotExistForNonDefaultConstructibleType) {
-  EXPECT_FALSE(BuiltInDefaultValue<MyNonDefaultConstructible>::Exists());
-}
-
-// Tests that BuiltInDefaultValue<T&>::Get() aborts the program.
-TEST(BuiltInDefaultValueDeathTest, IsUndefinedForReferences) {
-  EXPECT_DEATH_IF_SUPPORTED({
-    BuiltInDefaultValue<int&>::Get();
-  }, "");
-  EXPECT_DEATH_IF_SUPPORTED({
-    BuiltInDefaultValue<const char&>::Get();
-  }, "");
-}
-
-TEST(BuiltInDefaultValueDeathTest, IsUndefinedForNonDefaultConstructibleType) {
-  EXPECT_DEATH_IF_SUPPORTED({
-    BuiltInDefaultValue<MyNonDefaultConstructible>::Get();
-  }, "");
-}
-
-// Tests that DefaultValue<T>::IsSet() is false initially.
-TEST(DefaultValueTest, IsInitiallyUnset) {
-  EXPECT_FALSE(DefaultValue<int>::IsSet());
-  EXPECT_FALSE(DefaultValue<MyDefaultConstructible>::IsSet());
-  EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::IsSet());
-}
-
-// Tests that DefaultValue<T> can be set and then unset.
-TEST(DefaultValueTest, CanBeSetAndUnset) {
-  EXPECT_TRUE(DefaultValue<int>::Exists());
-  EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::Exists());
-
-  DefaultValue<int>::Set(1);
-  DefaultValue<const MyNonDefaultConstructible>::Set(
-      MyNonDefaultConstructible(42));
-
-  EXPECT_EQ(1, DefaultValue<int>::Get());
-  EXPECT_EQ(42, DefaultValue<const MyNonDefaultConstructible>::Get().value());
-
-  EXPECT_TRUE(DefaultValue<int>::Exists());
-  EXPECT_TRUE(DefaultValue<const MyNonDefaultConstructible>::Exists());
-
-  DefaultValue<int>::Clear();
-  DefaultValue<const MyNonDefaultConstructible>::Clear();
-
-  EXPECT_FALSE(DefaultValue<int>::IsSet());
-  EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::IsSet());
-
-  EXPECT_TRUE(DefaultValue<int>::Exists());
-  EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::Exists());
-}
-
-// Tests that DefaultValue<T>::Get() returns the
-// BuiltInDefaultValue<T>::Get() when DefaultValue<T>::IsSet() is
-// false.
-TEST(DefaultValueDeathTest, GetReturnsBuiltInDefaultValueWhenUnset) {
-  EXPECT_FALSE(DefaultValue<int>::IsSet());
-  EXPECT_TRUE(DefaultValue<int>::Exists());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible>::IsSet());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible>::Exists());
-
-  EXPECT_EQ(0, DefaultValue<int>::Get());
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    DefaultValue<MyNonDefaultConstructible>::Get();
-  }, "");
-}
-
-TEST(DefaultValueTest, GetWorksForMoveOnlyIfSet) {
-  EXPECT_TRUE(DefaultValue<std::unique_ptr<int>>::Exists());
-  EXPECT_TRUE(DefaultValue<std::unique_ptr<int>>::Get() == nullptr);
-  DefaultValue<std::unique_ptr<int>>::SetFactory([] {
-    return std::unique_ptr<int>(new int(42));
-  });
-  EXPECT_TRUE(DefaultValue<std::unique_ptr<int>>::Exists());
-  std::unique_ptr<int> i = DefaultValue<std::unique_ptr<int>>::Get();
-  EXPECT_EQ(42, *i);
-}
-
-// Tests that DefaultValue<void>::Get() returns void.
-TEST(DefaultValueTest, GetWorksForVoid) {
-  return DefaultValue<void>::Get();
-}
-
-// Tests using DefaultValue with a reference type.
-
-// Tests that DefaultValue<T&>::IsSet() is false initially.
-TEST(DefaultValueOfReferenceTest, IsInitiallyUnset) {
-  EXPECT_FALSE(DefaultValue<int&>::IsSet());
-  EXPECT_FALSE(DefaultValue<MyDefaultConstructible&>::IsSet());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::IsSet());
-}
-
-// Tests that DefaultValue<T&>::Exists is false initiallly.
-TEST(DefaultValueOfReferenceTest, IsInitiallyNotExisting) {
-  EXPECT_FALSE(DefaultValue<int&>::Exists());
-  EXPECT_FALSE(DefaultValue<MyDefaultConstructible&>::Exists());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::Exists());
-}
-
-// Tests that DefaultValue<T&> can be set and then unset.
-TEST(DefaultValueOfReferenceTest, CanBeSetAndUnset) {
-  int n = 1;
-  DefaultValue<const int&>::Set(n);
-  MyNonDefaultConstructible x(42);
-  DefaultValue<MyNonDefaultConstructible&>::Set(x);
-
-  EXPECT_TRUE(DefaultValue<const int&>::Exists());
-  EXPECT_TRUE(DefaultValue<MyNonDefaultConstructible&>::Exists());
-
-  EXPECT_EQ(&n, &(DefaultValue<const int&>::Get()));
-  EXPECT_EQ(&x, &(DefaultValue<MyNonDefaultConstructible&>::Get()));
-
-  DefaultValue<const int&>::Clear();
-  DefaultValue<MyNonDefaultConstructible&>::Clear();
-
-  EXPECT_FALSE(DefaultValue<const int&>::Exists());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::Exists());
-
-  EXPECT_FALSE(DefaultValue<const int&>::IsSet());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::IsSet());
-}
-
-// Tests that DefaultValue<T&>::Get() returns the
-// BuiltInDefaultValue<T&>::Get() when DefaultValue<T&>::IsSet() is
-// false.
-TEST(DefaultValueOfReferenceDeathTest, GetReturnsBuiltInDefaultValueWhenUnset) {
-  EXPECT_FALSE(DefaultValue<int&>::IsSet());
-  EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::IsSet());
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    DefaultValue<int&>::Get();
-  }, "");
-  EXPECT_DEATH_IF_SUPPORTED({
-    DefaultValue<MyNonDefaultConstructible>::Get();
-  }, "");
-}
-
-// Tests that ActionInterface can be implemented by defining the
-// Perform method.
-
-typedef int MyGlobalFunction(bool, int);
-
-class MyActionImpl : public ActionInterface<MyGlobalFunction> {
- public:
-  int Perform(const std::tuple<bool, int>& args) override {
-    return std::get<0>(args) ? std::get<1>(args) : 0;
-  }
-};
-
-TEST(ActionInterfaceTest, CanBeImplementedByDefiningPerform) {
-  MyActionImpl my_action_impl;
-  (void)my_action_impl;
-}
-
-TEST(ActionInterfaceTest, MakeAction) {
-  Action<MyGlobalFunction> action = MakeAction(new MyActionImpl);
-
-  // When exercising the Perform() method of Action<F>, we must pass
-  // it a tuple whose size and type are compatible with F's argument
-  // types.  For example, if F is int(), then Perform() takes a
-  // 0-tuple; if F is void(bool, int), then Perform() takes a
-  // std::tuple<bool, int>, and so on.
-  EXPECT_EQ(5, action.Perform(std::make_tuple(true, 5)));
-}
-
-// Tests that Action<F> can be contructed from a pointer to
-// ActionInterface<F>.
-TEST(ActionTest, CanBeConstructedFromActionInterface) {
-  Action<MyGlobalFunction> action(new MyActionImpl);
-}
-
-// Tests that Action<F> delegates actual work to ActionInterface<F>.
-TEST(ActionTest, DelegatesWorkToActionInterface) {
-  const Action<MyGlobalFunction> action(new MyActionImpl);
-
-  EXPECT_EQ(5, action.Perform(std::make_tuple(true, 5)));
-  EXPECT_EQ(0, action.Perform(std::make_tuple(false, 1)));
-}
-
-// Tests that Action<F> can be copied.
-TEST(ActionTest, IsCopyable) {
-  Action<MyGlobalFunction> a1(new MyActionImpl);
-  Action<MyGlobalFunction> a2(a1);  // Tests the copy constructor.
-
-  // a1 should continue to work after being copied from.
-  EXPECT_EQ(5, a1.Perform(std::make_tuple(true, 5)));
-  EXPECT_EQ(0, a1.Perform(std::make_tuple(false, 1)));
-
-  // a2 should work like the action it was copied from.
-  EXPECT_EQ(5, a2.Perform(std::make_tuple(true, 5)));
-  EXPECT_EQ(0, a2.Perform(std::make_tuple(false, 1)));
-
-  a2 = a1;  // Tests the assignment operator.
-
-  // a1 should continue to work after being copied from.
-  EXPECT_EQ(5, a1.Perform(std::make_tuple(true, 5)));
-  EXPECT_EQ(0, a1.Perform(std::make_tuple(false, 1)));
-
-  // a2 should work like the action it was copied from.
-  EXPECT_EQ(5, a2.Perform(std::make_tuple(true, 5)));
-  EXPECT_EQ(0, a2.Perform(std::make_tuple(false, 1)));
-}
-
-// Tests that an Action<From> object can be converted to a
-// compatible Action<To> object.
-
-class IsNotZero : public ActionInterface<bool(int)> {  // NOLINT
- public:
-  bool Perform(const std::tuple<int>& arg) override {
-    return std::get<0>(arg) != 0;
-  }
-};
-
-TEST(ActionTest, CanBeConvertedToOtherActionType) {
-  const Action<bool(int)> a1(new IsNotZero);  // NOLINT
-  const Action<int(char)> a2 = Action<int(char)>(a1);  // NOLINT
-  EXPECT_EQ(1, a2.Perform(std::make_tuple('a')));
-  EXPECT_EQ(0, a2.Perform(std::make_tuple('\0')));
-}
-
-// The following two classes are for testing MakePolymorphicAction().
-
-// Implements a polymorphic action that returns the second of the
-// arguments it receives.
-class ReturnSecondArgumentAction {
- public:
-  // We want to verify that MakePolymorphicAction() can work with a
-  // polymorphic action whose Perform() method template is either
-  // const or not.  This lets us verify the non-const case.
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& args) {
-    return std::get<1>(args);
-  }
-};
-
-// Implements a polymorphic action that can be used in a nullary
-// function to return 0.
-class ReturnZeroFromNullaryFunctionAction {
- public:
-  // For testing that MakePolymorphicAction() works when the
-  // implementation class' Perform() method template takes only one
-  // template parameter.
-  //
-  // We want to verify that MakePolymorphicAction() can work with a
-  // polymorphic action whose Perform() method template is either
-  // const or not.  This lets us verify the const case.
-  template <typename Result>
-  Result Perform(const std::tuple<>&) const {
-    return 0;
-  }
-};
-
-// These functions verify that MakePolymorphicAction() returns a
-// PolymorphicAction<T> where T is the argument's type.
-
-PolymorphicAction<ReturnSecondArgumentAction> ReturnSecondArgument() {
-  return MakePolymorphicAction(ReturnSecondArgumentAction());
-}
-
-PolymorphicAction<ReturnZeroFromNullaryFunctionAction>
-ReturnZeroFromNullaryFunction() {
-  return MakePolymorphicAction(ReturnZeroFromNullaryFunctionAction());
-}
-
-// Tests that MakePolymorphicAction() turns a polymorphic action
-// implementation class into a polymorphic action.
-TEST(MakePolymorphicActionTest, ConstructsActionFromImpl) {
-  Action<int(bool, int, double)> a1 = ReturnSecondArgument();  // NOLINT
-  EXPECT_EQ(5, a1.Perform(std::make_tuple(false, 5, 2.0)));
-}
-
-// Tests that MakePolymorphicAction() works when the implementation
-// class' Perform() method template has only one template parameter.
-TEST(MakePolymorphicActionTest, WorksWhenPerformHasOneTemplateParameter) {
-  Action<int()> a1 = ReturnZeroFromNullaryFunction();
-  EXPECT_EQ(0, a1.Perform(std::make_tuple()));
-
-  Action<void*()> a2 = ReturnZeroFromNullaryFunction();
-  EXPECT_TRUE(a2.Perform(std::make_tuple()) == nullptr);
-}
-
-// Tests that Return() works as an action for void-returning
-// functions.
-TEST(ReturnTest, WorksForVoid) {
-  const Action<void(int)> ret = Return();  // NOLINT
-  return ret.Perform(std::make_tuple(1));
-}
-
-// Tests that Return(v) returns v.
-TEST(ReturnTest, ReturnsGivenValue) {
-  Action<int()> ret = Return(1);  // NOLINT
-  EXPECT_EQ(1, ret.Perform(std::make_tuple()));
-
-  ret = Return(-5);
-  EXPECT_EQ(-5, ret.Perform(std::make_tuple()));
-}
-
-// Tests that Return("string literal") works.
-TEST(ReturnTest, AcceptsStringLiteral) {
-  Action<const char*()> a1 = Return("Hello");
-  EXPECT_STREQ("Hello", a1.Perform(std::make_tuple()));
-
-  Action<std::string()> a2 = Return("world");
-  EXPECT_EQ("world", a2.Perform(std::make_tuple()));
-}
-
-// Test struct which wraps a vector of integers. Used in
-// 'SupportsWrapperReturnType' test.
-struct IntegerVectorWrapper {
-  std::vector<int> * v;
-  IntegerVectorWrapper(std::vector<int>& _v) : v(&_v) {}  // NOLINT
-};
-
-// Tests that Return() works when return type is a wrapper type.
-TEST(ReturnTest, SupportsWrapperReturnType) {
-  // Initialize vector of integers.
-  std::vector<int> v;
-  for (int i = 0; i < 5; ++i) v.push_back(i);
-
-  // Return() called with 'v' as argument. The Action will return the same data
-  // as 'v' (copy) but it will be wrapped in an IntegerVectorWrapper.
-  Action<IntegerVectorWrapper()> a = Return(v);
-  const std::vector<int>& result = *(a.Perform(std::make_tuple()).v);
-  EXPECT_THAT(result, ::testing::ElementsAre(0, 1, 2, 3, 4));
-}
-
-// Tests that Return(v) is covaraint.
-
-struct Base {
-  bool operator==(const Base&) { return true; }
-};
-
-struct Derived : public Base {
-  bool operator==(const Derived&) { return true; }
-};
-
-TEST(ReturnTest, IsCovariant) {
-  Base base;
-  Derived derived;
-  Action<Base*()> ret = Return(&base);
-  EXPECT_EQ(&base, ret.Perform(std::make_tuple()));
-
-  ret = Return(&derived);
-  EXPECT_EQ(&derived, ret.Perform(std::make_tuple()));
-}
-
-// Tests that the type of the value passed into Return is converted into T
-// when the action is cast to Action<T(...)> rather than when the action is
-// performed. See comments on testing::internal::ReturnAction in
-// gmock-actions.h for more information.
-class FromType {
- public:
-  explicit FromType(bool* is_converted) : converted_(is_converted) {}
-  bool* converted() const { return converted_; }
-
- private:
-  bool* const converted_;
-};
-
-class ToType {
- public:
-  // Must allow implicit conversion due to use in ImplicitCast_<T>.
-  ToType(const FromType& x) { *x.converted() = true; }  // NOLINT
-};
-
-TEST(ReturnTest, ConvertsArgumentWhenConverted) {
-  bool converted = false;
-  FromType x(&converted);
-  Action<ToType()> action(Return(x));
-  EXPECT_TRUE(converted) << "Return must convert its argument in its own "
-                         << "conversion operator.";
-  converted = false;
-  action.Perform(std::tuple<>());
-  EXPECT_FALSE(converted) << "Action must NOT convert its argument "
-                          << "when performed.";
-}
-
-class DestinationType {};
-
-class SourceType {
- public:
-  // Note: a non-const typecast operator.
-  operator DestinationType() { return DestinationType(); }
-};
-
-TEST(ReturnTest, CanConvertArgumentUsingNonConstTypeCastOperator) {
-  SourceType s;
-  Action<DestinationType()> action(Return(s));
-}
-
-// Tests that ReturnNull() returns NULL in a pointer-returning function.
-TEST(ReturnNullTest, WorksInPointerReturningFunction) {
-  const Action<int*()> a1 = ReturnNull();
-  EXPECT_TRUE(a1.Perform(std::make_tuple()) == nullptr);
-
-  const Action<const char*(bool)> a2 = ReturnNull();  // NOLINT
-  EXPECT_TRUE(a2.Perform(std::make_tuple(true)) == nullptr);
-}
-
-// Tests that ReturnNull() returns NULL for shared_ptr and unique_ptr returning
-// functions.
-TEST(ReturnNullTest, WorksInSmartPointerReturningFunction) {
-  const Action<std::unique_ptr<const int>()> a1 = ReturnNull();
-  EXPECT_TRUE(a1.Perform(std::make_tuple()) == nullptr);
-
-  const Action<std::shared_ptr<int>(std::string)> a2 = ReturnNull();
-  EXPECT_TRUE(a2.Perform(std::make_tuple("foo")) == nullptr);
-}
-
-// Tests that ReturnRef(v) works for reference types.
-TEST(ReturnRefTest, WorksForReference) {
-  const int n = 0;
-  const Action<const int&(bool)> ret = ReturnRef(n);  // NOLINT
-
-  EXPECT_EQ(&n, &ret.Perform(std::make_tuple(true)));
-}
-
-// Tests that ReturnRef(v) is covariant.
-TEST(ReturnRefTest, IsCovariant) {
-  Base base;
-  Derived derived;
-  Action<Base&()> a = ReturnRef(base);
-  EXPECT_EQ(&base, &a.Perform(std::make_tuple()));
-
-  a = ReturnRef(derived);
-  EXPECT_EQ(&derived, &a.Perform(std::make_tuple()));
-}
-
-template <typename T, typename = decltype(ReturnRef(std::declval<T&&>()))>
-bool CanCallReturnRef(T&&) { return true; }
-bool CanCallReturnRef(Unused) { return false; }
-
-// Tests that ReturnRef(v) is working with non-temporaries (T&)
-TEST(ReturnRefTest, WorksForNonTemporary) {
-  int scalar_value = 123;
-  EXPECT_TRUE(CanCallReturnRef(scalar_value));
-
-  std::string non_scalar_value("ABC");
-  EXPECT_TRUE(CanCallReturnRef(non_scalar_value));
-
-  const int const_scalar_value{321};
-  EXPECT_TRUE(CanCallReturnRef(const_scalar_value));
-
-  const std::string const_non_scalar_value("CBA");
-  EXPECT_TRUE(CanCallReturnRef(const_non_scalar_value));
-}
-
-// Tests that ReturnRef(v) is not working with temporaries (T&&)
-TEST(ReturnRefTest, DoesNotWorkForTemporary) {
-  auto scalar_value = []()  -> int { return 123; };
-  EXPECT_FALSE(CanCallReturnRef(scalar_value()));
-
-  auto non_scalar_value = []() -> std::string { return "ABC"; };
-  EXPECT_FALSE(CanCallReturnRef(non_scalar_value()));
-
-  // cannot use here callable returning "const scalar type",
-  // because such const for scalar return type is ignored
-  EXPECT_FALSE(CanCallReturnRef(static_cast<const int>(321)));
-
-  auto const_non_scalar_value = []() -> const std::string { return "CBA"; };
-  EXPECT_FALSE(CanCallReturnRef(const_non_scalar_value()));
-}
-
-// Tests that ReturnRefOfCopy(v) works for reference types.
-TEST(ReturnRefOfCopyTest, WorksForReference) {
-  int n = 42;
-  const Action<const int&()> ret = ReturnRefOfCopy(n);
-
-  EXPECT_NE(&n, &ret.Perform(std::make_tuple()));
-  EXPECT_EQ(42, ret.Perform(std::make_tuple()));
-
-  n = 43;
-  EXPECT_NE(&n, &ret.Perform(std::make_tuple()));
-  EXPECT_EQ(42, ret.Perform(std::make_tuple()));
-}
-
-// Tests that ReturnRefOfCopy(v) is covariant.
-TEST(ReturnRefOfCopyTest, IsCovariant) {
-  Base base;
-  Derived derived;
-  Action<Base&()> a = ReturnRefOfCopy(base);
-  EXPECT_NE(&base, &a.Perform(std::make_tuple()));
-
-  a = ReturnRefOfCopy(derived);
-  EXPECT_NE(&derived, &a.Perform(std::make_tuple()));
-}
-
-// Tests that ReturnRoundRobin(v) works with initializer lists
-TEST(ReturnRoundRobinTest, WorksForInitList) {
-  Action<int()> ret = ReturnRoundRobin({1, 2, 3});
-
-  EXPECT_EQ(1, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(2, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(3, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(1, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(2, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(3, ret.Perform(std::make_tuple()));
-}
-
-// Tests that ReturnRoundRobin(v) works with vectors
-TEST(ReturnRoundRobinTest, WorksForVector) {
-  std::vector<double> v = {4.4, 5.5, 6.6};
-  Action<double()> ret = ReturnRoundRobin(v);
-
-  EXPECT_EQ(4.4, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(5.5, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(6.6, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(4.4, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(5.5, ret.Perform(std::make_tuple()));
-  EXPECT_EQ(6.6, ret.Perform(std::make_tuple()));
-}
-
-// Tests that DoDefault() does the default action for the mock method.
-
-class MockClass {
- public:
-  MockClass() {}
-
-  MOCK_METHOD1(IntFunc, int(bool flag));  // NOLINT
-  MOCK_METHOD0(Foo, MyNonDefaultConstructible());
-  MOCK_METHOD0(MakeUnique, std::unique_ptr<int>());
-  MOCK_METHOD0(MakeUniqueBase, std::unique_ptr<Base>());
-  MOCK_METHOD0(MakeVectorUnique, std::vector<std::unique_ptr<int>>());
-  MOCK_METHOD1(TakeUnique, int(std::unique_ptr<int>));
-  MOCK_METHOD2(TakeUnique,
-               int(const std::unique_ptr<int>&, std::unique_ptr<int>));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockClass);
-};
-
-// Tests that DoDefault() returns the built-in default value for the
-// return type by default.
-TEST(DoDefaultTest, ReturnsBuiltInDefaultValueByDefault) {
-  MockClass mock;
-  EXPECT_CALL(mock, IntFunc(_))
-      .WillOnce(DoDefault());
-  EXPECT_EQ(0, mock.IntFunc(true));
-}
-
-// Tests that DoDefault() throws (when exceptions are enabled) or aborts
-// the process when there is no built-in default value for the return type.
-TEST(DoDefaultDeathTest, DiesForUnknowType) {
-  MockClass mock;
-  EXPECT_CALL(mock, Foo())
-      .WillRepeatedly(DoDefault());
-#if GTEST_HAS_EXCEPTIONS
-  EXPECT_ANY_THROW(mock.Foo());
-#else
-  EXPECT_DEATH_IF_SUPPORTED({
-    mock.Foo();
-  }, "");
-#endif
-}
-
-// Tests that using DoDefault() inside a composite action leads to a
-// run-time error.
-
-void VoidFunc(bool /* flag */) {}
-
-TEST(DoDefaultDeathTest, DiesIfUsedInCompositeAction) {
-  MockClass mock;
-  EXPECT_CALL(mock, IntFunc(_))
-      .WillRepeatedly(DoAll(Invoke(VoidFunc),
-                            DoDefault()));
-
-  // Ideally we should verify the error message as well.  Sadly,
-  // EXPECT_DEATH() can only capture stderr, while Google Mock's
-  // errors are printed on stdout.  Therefore we have to settle for
-  // not verifying the message.
-  EXPECT_DEATH_IF_SUPPORTED({
-    mock.IntFunc(true);
-  }, "");
-}
-
-// Tests that DoDefault() returns the default value set by
-// DefaultValue<T>::Set() when it's not overridden by an ON_CALL().
-TEST(DoDefaultTest, ReturnsUserSpecifiedPerTypeDefaultValueWhenThereIsOne) {
-  DefaultValue<int>::Set(1);
-  MockClass mock;
-  EXPECT_CALL(mock, IntFunc(_))
-      .WillOnce(DoDefault());
-  EXPECT_EQ(1, mock.IntFunc(false));
-  DefaultValue<int>::Clear();
-}
-
-// Tests that DoDefault() does the action specified by ON_CALL().
-TEST(DoDefaultTest, DoesWhatOnCallSpecifies) {
-  MockClass mock;
-  ON_CALL(mock, IntFunc(_))
-      .WillByDefault(Return(2));
-  EXPECT_CALL(mock, IntFunc(_))
-      .WillOnce(DoDefault());
-  EXPECT_EQ(2, mock.IntFunc(false));
-}
-
-// Tests that using DoDefault() in ON_CALL() leads to a run-time failure.
-TEST(DoDefaultTest, CannotBeUsedInOnCall) {
-  MockClass mock;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    ON_CALL(mock, IntFunc(_))
-      .WillByDefault(DoDefault());
-  }, "DoDefault() cannot be used in ON_CALL()");
-}
-
-// Tests that SetArgPointee<N>(v) sets the variable pointed to by
-// the N-th (0-based) argument to v.
-TEST(SetArgPointeeTest, SetsTheNthPointee) {
-  typedef void MyFunction(bool, int*, char*);
-  Action<MyFunction> a = SetArgPointee<1>(2);
-
-  int n = 0;
-  char ch = '\0';
-  a.Perform(std::make_tuple(true, &n, &ch));
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('\0', ch);
-
-  a = SetArgPointee<2>('a');
-  n = 0;
-  ch = '\0';
-  a.Perform(std::make_tuple(true, &n, &ch));
-  EXPECT_EQ(0, n);
-  EXPECT_EQ('a', ch);
-}
-
-// Tests that SetArgPointee<N>() accepts a string literal.
-TEST(SetArgPointeeTest, AcceptsStringLiteral) {
-  typedef void MyFunction(std::string*, const char**);
-  Action<MyFunction> a = SetArgPointee<0>("hi");
-  std::string str;
-  const char* ptr = nullptr;
-  a.Perform(std::make_tuple(&str, &ptr));
-  EXPECT_EQ("hi", str);
-  EXPECT_TRUE(ptr == nullptr);
-
-  a = SetArgPointee<1>("world");
-  str = "";
-  a.Perform(std::make_tuple(&str, &ptr));
-  EXPECT_EQ("", str);
-  EXPECT_STREQ("world", ptr);
-}
-
-TEST(SetArgPointeeTest, AcceptsWideStringLiteral) {
-  typedef void MyFunction(const wchar_t**);
-  Action<MyFunction> a = SetArgPointee<0>(L"world");
-  const wchar_t* ptr = nullptr;
-  a.Perform(std::make_tuple(&ptr));
-  EXPECT_STREQ(L"world", ptr);
-
-# if GTEST_HAS_STD_WSTRING
-
-  typedef void MyStringFunction(std::wstring*);
-  Action<MyStringFunction> a2 = SetArgPointee<0>(L"world");
-  std::wstring str = L"";
-  a2.Perform(std::make_tuple(&str));
-  EXPECT_EQ(L"world", str);
-
-# endif
-}
-
-// Tests that SetArgPointee<N>() accepts a char pointer.
-TEST(SetArgPointeeTest, AcceptsCharPointer) {
-  typedef void MyFunction(bool, std::string*, const char**);
-  const char* const hi = "hi";
-  Action<MyFunction> a = SetArgPointee<1>(hi);
-  std::string str;
-  const char* ptr = nullptr;
-  a.Perform(std::make_tuple(true, &str, &ptr));
-  EXPECT_EQ("hi", str);
-  EXPECT_TRUE(ptr == nullptr);
-
-  char world_array[] = "world";
-  char* const world = world_array;
-  a = SetArgPointee<2>(world);
-  str = "";
-  a.Perform(std::make_tuple(true, &str, &ptr));
-  EXPECT_EQ("", str);
-  EXPECT_EQ(world, ptr);
-}
-
-TEST(SetArgPointeeTest, AcceptsWideCharPointer) {
-  typedef void MyFunction(bool, const wchar_t**);
-  const wchar_t* const hi = L"hi";
-  Action<MyFunction> a = SetArgPointee<1>(hi);
-  const wchar_t* ptr = nullptr;
-  a.Perform(std::make_tuple(true, &ptr));
-  EXPECT_EQ(hi, ptr);
-
-# if GTEST_HAS_STD_WSTRING
-
-  typedef void MyStringFunction(bool, std::wstring*);
-  wchar_t world_array[] = L"world";
-  wchar_t* const world = world_array;
-  Action<MyStringFunction> a2 = SetArgPointee<1>(world);
-  std::wstring str;
-  a2.Perform(std::make_tuple(true, &str));
-  EXPECT_EQ(world_array, str);
-# endif
-}
-
-// Tests that SetArgumentPointee<N>(v) sets the variable pointed to by
-// the N-th (0-based) argument to v.
-TEST(SetArgumentPointeeTest, SetsTheNthPointee) {
-  typedef void MyFunction(bool, int*, char*);
-  Action<MyFunction> a = SetArgumentPointee<1>(2);
-
-  int n = 0;
-  char ch = '\0';
-  a.Perform(std::make_tuple(true, &n, &ch));
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('\0', ch);
-
-  a = SetArgumentPointee<2>('a');
-  n = 0;
-  ch = '\0';
-  a.Perform(std::make_tuple(true, &n, &ch));
-  EXPECT_EQ(0, n);
-  EXPECT_EQ('a', ch);
-}
-
-// Sample functions and functors for testing Invoke() and etc.
-int Nullary() { return 1; }
-
-class NullaryFunctor {
- public:
-  int operator()() { return 2; }
-};
-
-bool g_done = false;
-void VoidNullary() { g_done = true; }
-
-class VoidNullaryFunctor {
- public:
-  void operator()() { g_done = true; }
-};
-
-short Short(short n) { return n; }  // NOLINT
-char Char(char ch) { return ch; }
-
-const char* CharPtr(const char* s) { return s; }
-
-bool Unary(int x) { return x < 0; }
-
-const char* Binary(const char* input, short n) { return input + n; }  // NOLINT
-
-void VoidBinary(int, char) { g_done = true; }
-
-int Ternary(int x, char y, short z) { return x + y + z; }  // NOLINT
-
-int SumOf4(int a, int b, int c, int d) { return a + b + c + d; }
-
-class Foo {
- public:
-  Foo() : value_(123) {}
-
-  int Nullary() const { return value_; }
-
- private:
-  int value_;
-};
-
-// Tests InvokeWithoutArgs(function).
-TEST(InvokeWithoutArgsTest, Function) {
-  // As an action that takes one argument.
-  Action<int(int)> a = InvokeWithoutArgs(Nullary);  // NOLINT
-  EXPECT_EQ(1, a.Perform(std::make_tuple(2)));
-
-  // As an action that takes two arguments.
-  Action<int(int, double)> a2 = InvokeWithoutArgs(Nullary);  // NOLINT
-  EXPECT_EQ(1, a2.Perform(std::make_tuple(2, 3.5)));
-
-  // As an action that returns void.
-  Action<void(int)> a3 = InvokeWithoutArgs(VoidNullary);  // NOLINT
-  g_done = false;
-  a3.Perform(std::make_tuple(1));
-  EXPECT_TRUE(g_done);
-}
-
-// Tests InvokeWithoutArgs(functor).
-TEST(InvokeWithoutArgsTest, Functor) {
-  // As an action that takes no argument.
-  Action<int()> a = InvokeWithoutArgs(NullaryFunctor());  // NOLINT
-  EXPECT_EQ(2, a.Perform(std::make_tuple()));
-
-  // As an action that takes three arguments.
-  Action<int(int, double, char)> a2 =  // NOLINT
-      InvokeWithoutArgs(NullaryFunctor());
-  EXPECT_EQ(2, a2.Perform(std::make_tuple(3, 3.5, 'a')));
-
-  // As an action that returns void.
-  Action<void()> a3 = InvokeWithoutArgs(VoidNullaryFunctor());
-  g_done = false;
-  a3.Perform(std::make_tuple());
-  EXPECT_TRUE(g_done);
-}
-
-// Tests InvokeWithoutArgs(obj_ptr, method).
-TEST(InvokeWithoutArgsTest, Method) {
-  Foo foo;
-  Action<int(bool, char)> a =  // NOLINT
-      InvokeWithoutArgs(&foo, &Foo::Nullary);
-  EXPECT_EQ(123, a.Perform(std::make_tuple(true, 'a')));
-}
-
-// Tests using IgnoreResult() on a polymorphic action.
-TEST(IgnoreResultTest, PolymorphicAction) {
-  Action<void(int)> a = IgnoreResult(Return(5));  // NOLINT
-  a.Perform(std::make_tuple(1));
-}
-
-// Tests using IgnoreResult() on a monomorphic action.
-
-int ReturnOne() {
-  g_done = true;
-  return 1;
-}
-
-TEST(IgnoreResultTest, MonomorphicAction) {
-  g_done = false;
-  Action<void()> a = IgnoreResult(Invoke(ReturnOne));
-  a.Perform(std::make_tuple());
-  EXPECT_TRUE(g_done);
-}
-
-// Tests using IgnoreResult() on an action that returns a class type.
-
-MyNonDefaultConstructible ReturnMyNonDefaultConstructible(double /* x */) {
-  g_done = true;
-  return MyNonDefaultConstructible(42);
-}
-
-TEST(IgnoreResultTest, ActionReturningClass) {
-  g_done = false;
-  Action<void(int)> a =
-      IgnoreResult(Invoke(ReturnMyNonDefaultConstructible));  // NOLINT
-  a.Perform(std::make_tuple(2));
-  EXPECT_TRUE(g_done);
-}
-
-TEST(AssignTest, Int) {
-  int x = 0;
-  Action<void(int)> a = Assign(&x, 5);
-  a.Perform(std::make_tuple(0));
-  EXPECT_EQ(5, x);
-}
-
-TEST(AssignTest, String) {
-  ::std::string x;
-  Action<void(void)> a = Assign(&x, "Hello, world");
-  a.Perform(std::make_tuple());
-  EXPECT_EQ("Hello, world", x);
-}
-
-TEST(AssignTest, CompatibleTypes) {
-  double x = 0;
-  Action<void(int)> a = Assign(&x, 5);
-  a.Perform(std::make_tuple(0));
-  EXPECT_DOUBLE_EQ(5, x);
-}
-
-
-// Tests using WithArgs and with an action that takes 1 argument.
-TEST(WithArgsTest, OneArg) {
-  Action<bool(double x, int n)> a = WithArgs<1>(Invoke(Unary));  // NOLINT
-  EXPECT_TRUE(a.Perform(std::make_tuple(1.5, -1)));
-  EXPECT_FALSE(a.Perform(std::make_tuple(1.5, 1)));
-}
-
-// Tests using WithArgs with an action that takes 2 arguments.
-TEST(WithArgsTest, TwoArgs) {
-  Action<const char*(const char* s, double x, short n)> a =  // NOLINT
-      WithArgs<0, 2>(Invoke(Binary));
-  const char s[] = "Hello";
-  EXPECT_EQ(s + 2, a.Perform(std::make_tuple(CharPtr(s), 0.5, Short(2))));
-}
-
-struct ConcatAll {
-  std::string operator()() const { return {}; }
-  template <typename... I>
-  std::string operator()(const char* a, I... i) const {
-    return a + ConcatAll()(i...);
-  }
-};
-
-// Tests using WithArgs with an action that takes 10 arguments.
-TEST(WithArgsTest, TenArgs) {
-  Action<std::string(const char*, const char*, const char*, const char*)> a =
-      WithArgs<0, 1, 2, 3, 2, 1, 0, 1, 2, 3>(Invoke(ConcatAll{}));
-  EXPECT_EQ("0123210123",
-            a.Perform(std::make_tuple(CharPtr("0"), CharPtr("1"), CharPtr("2"),
-                                      CharPtr("3"))));
-}
-
-// Tests using WithArgs with an action that is not Invoke().
-class SubtractAction : public ActionInterface<int(int, int)> {
- public:
-  int Perform(const std::tuple<int, int>& args) override {
-    return std::get<0>(args) - std::get<1>(args);
-  }
-};
-
-TEST(WithArgsTest, NonInvokeAction) {
-  Action<int(const std::string&, int, int)> a =
-      WithArgs<2, 1>(MakeAction(new SubtractAction));
-  std::tuple<std::string, int, int> dummy =
-      std::make_tuple(std::string("hi"), 2, 10);
-  EXPECT_EQ(8, a.Perform(dummy));
-}
-
-// Tests using WithArgs to pass all original arguments in the original order.
-TEST(WithArgsTest, Identity) {
-  Action<int(int x, char y, short z)> a =  // NOLINT
-      WithArgs<0, 1, 2>(Invoke(Ternary));
-  EXPECT_EQ(123, a.Perform(std::make_tuple(100, Char(20), Short(3))));
-}
-
-// Tests using WithArgs with repeated arguments.
-TEST(WithArgsTest, RepeatedArguments) {
-  Action<int(bool, int m, int n)> a =  // NOLINT
-      WithArgs<1, 1, 1, 1>(Invoke(SumOf4));
-  EXPECT_EQ(4, a.Perform(std::make_tuple(false, 1, 10)));
-}
-
-// Tests using WithArgs with reversed argument order.
-TEST(WithArgsTest, ReversedArgumentOrder) {
-  Action<const char*(short n, const char* input)> a =  // NOLINT
-      WithArgs<1, 0>(Invoke(Binary));
-  const char s[] = "Hello";
-  EXPECT_EQ(s + 2, a.Perform(std::make_tuple(Short(2), CharPtr(s))));
-}
-
-// Tests using WithArgs with compatible, but not identical, argument types.
-TEST(WithArgsTest, ArgsOfCompatibleTypes) {
-  Action<long(short x, char y, double z, char c)> a =  // NOLINT
-      WithArgs<0, 1, 3>(Invoke(Ternary));
-  EXPECT_EQ(123,
-            a.Perform(std::make_tuple(Short(100), Char(20), 5.6, Char(3))));
-}
-
-// Tests using WithArgs with an action that returns void.
-TEST(WithArgsTest, VoidAction) {
-  Action<void(double x, char c, int n)> a = WithArgs<2, 1>(Invoke(VoidBinary));
-  g_done = false;
-  a.Perform(std::make_tuple(1.5, 'a', 3));
-  EXPECT_TRUE(g_done);
-}
-
-TEST(WithArgsTest, ReturnReference) {
-  Action<int&(int&, void*)> aa = WithArgs<0>([](int& a) -> int& { return a; });
-  int i = 0;
-  const int& res = aa.Perform(std::forward_as_tuple(i, nullptr));
-  EXPECT_EQ(&i, &res);
-}
-
-TEST(WithArgsTest, InnerActionWithConversion) {
-  Action<Derived*()> inner = [] { return nullptr; };
-  Action<Base*(double)> a = testing::WithoutArgs(inner);
-  EXPECT_EQ(nullptr, a.Perform(std::make_tuple(1.1)));
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-class SetErrnoAndReturnTest : public testing::Test {
- protected:
-  void SetUp() override { errno = 0; }
-  void TearDown() override { errno = 0; }
-};
-
-TEST_F(SetErrnoAndReturnTest, Int) {
-  Action<int(void)> a = SetErrnoAndReturn(ENOTTY, -5);
-  EXPECT_EQ(-5, a.Perform(std::make_tuple()));
-  EXPECT_EQ(ENOTTY, errno);
-}
-
-TEST_F(SetErrnoAndReturnTest, Ptr) {
-  int x;
-  Action<int*(void)> a = SetErrnoAndReturn(ENOTTY, &x);
-  EXPECT_EQ(&x, a.Perform(std::make_tuple()));
-  EXPECT_EQ(ENOTTY, errno);
-}
-
-TEST_F(SetErrnoAndReturnTest, CompatibleTypes) {
-  Action<double()> a = SetErrnoAndReturn(EINVAL, 5);
-  EXPECT_DOUBLE_EQ(5.0, a.Perform(std::make_tuple()));
-  EXPECT_EQ(EINVAL, errno);
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests ByRef().
-
-// Tests that the result of ByRef() is copyable.
-TEST(ByRefTest, IsCopyable) {
-  const std::string s1 = "Hi";
-  const std::string s2 = "Hello";
-
-  auto ref_wrapper = ByRef(s1);
-  const std::string& r1 = ref_wrapper;
-  EXPECT_EQ(&s1, &r1);
-
-  // Assigns a new value to ref_wrapper.
-  ref_wrapper = ByRef(s2);
-  const std::string& r2 = ref_wrapper;
-  EXPECT_EQ(&s2, &r2);
-
-  auto ref_wrapper1 = ByRef(s1);
-  // Copies ref_wrapper1 to ref_wrapper.
-  ref_wrapper = ref_wrapper1;
-  const std::string& r3 = ref_wrapper;
-  EXPECT_EQ(&s1, &r3);
-}
-
-// Tests using ByRef() on a const value.
-TEST(ByRefTest, ConstValue) {
-  const int n = 0;
-  // int& ref = ByRef(n);  // This shouldn't compile - we have a
-                           // negative compilation test to catch it.
-  const int& const_ref = ByRef(n);
-  EXPECT_EQ(&n, &const_ref);
-}
-
-// Tests using ByRef() on a non-const value.
-TEST(ByRefTest, NonConstValue) {
-  int n = 0;
-
-  // ByRef(n) can be used as either an int&,
-  int& ref = ByRef(n);
-  EXPECT_EQ(&n, &ref);
-
-  // or a const int&.
-  const int& const_ref = ByRef(n);
-  EXPECT_EQ(&n, &const_ref);
-}
-
-// Tests explicitly specifying the type when using ByRef().
-TEST(ByRefTest, ExplicitType) {
-  int n = 0;
-  const int& r1 = ByRef<const int>(n);
-  EXPECT_EQ(&n, &r1);
-
-  // ByRef<char>(n);  // This shouldn't compile - we have a negative
-                      // compilation test to catch it.
-
-  Derived d;
-  Derived& r2 = ByRef<Derived>(d);
-  EXPECT_EQ(&d, &r2);
-
-  const Derived& r3 = ByRef<const Derived>(d);
-  EXPECT_EQ(&d, &r3);
-
-  Base& r4 = ByRef<Base>(d);
-  EXPECT_EQ(&d, &r4);
-
-  const Base& r5 = ByRef<const Base>(d);
-  EXPECT_EQ(&d, &r5);
-
-  // The following shouldn't compile - we have a negative compilation
-  // test for it.
-  //
-  // Base b;
-  // ByRef<Derived>(b);
-}
-
-// Tests that Google Mock prints expression ByRef(x) as a reference to x.
-TEST(ByRefTest, PrintsCorrectly) {
-  int n = 42;
-  ::std::stringstream expected, actual;
-  testing::internal::UniversalPrinter<const int&>::Print(n, &expected);
-  testing::internal::UniversalPrint(ByRef(n), &actual);
-  EXPECT_EQ(expected.str(), actual.str());
-}
-
-struct UnaryConstructorClass {
-  explicit UnaryConstructorClass(int v) : value(v) {}
-  int value;
-};
-
-// Tests using ReturnNew() with a unary constructor.
-TEST(ReturnNewTest, Unary) {
-  Action<UnaryConstructorClass*()> a = ReturnNew<UnaryConstructorClass>(4000);
-  UnaryConstructorClass* c = a.Perform(std::make_tuple());
-  EXPECT_EQ(4000, c->value);
-  delete c;
-}
-
-TEST(ReturnNewTest, UnaryWorksWhenMockMethodHasArgs) {
-  Action<UnaryConstructorClass*(bool, int)> a =
-      ReturnNew<UnaryConstructorClass>(4000);
-  UnaryConstructorClass* c = a.Perform(std::make_tuple(false, 5));
-  EXPECT_EQ(4000, c->value);
-  delete c;
-}
-
-TEST(ReturnNewTest, UnaryWorksWhenMockMethodReturnsPointerToConst) {
-  Action<const UnaryConstructorClass*()> a =
-      ReturnNew<UnaryConstructorClass>(4000);
-  const UnaryConstructorClass* c = a.Perform(std::make_tuple());
-  EXPECT_EQ(4000, c->value);
-  delete c;
-}
-
-class TenArgConstructorClass {
- public:
-  TenArgConstructorClass(int a1, int a2, int a3, int a4, int a5, int a6, int a7,
-                         int a8, int a9, int a10)
-      : value_(a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10) {}
-  int value_;
-};
-
-// Tests using ReturnNew() with a 10-argument constructor.
-TEST(ReturnNewTest, ConstructorThatTakes10Arguments) {
-  Action<TenArgConstructorClass*()> a = ReturnNew<TenArgConstructorClass>(
-      1000000000, 200000000, 30000000, 4000000, 500000, 60000, 7000, 800, 90,
-      0);
-  TenArgConstructorClass* c = a.Perform(std::make_tuple());
-  EXPECT_EQ(1234567890, c->value_);
-  delete c;
-}
-
-std::unique_ptr<int> UniquePtrSource() {
-  return std::unique_ptr<int>(new int(19));
-}
-
-std::vector<std::unique_ptr<int>> VectorUniquePtrSource() {
-  std::vector<std::unique_ptr<int>> out;
-  out.emplace_back(new int(7));
-  return out;
-}
-
-TEST(MockMethodTest, CanReturnMoveOnlyValue_Return) {
-  MockClass mock;
-  std::unique_ptr<int> i(new int(19));
-  EXPECT_CALL(mock, MakeUnique()).WillOnce(Return(ByMove(std::move(i))));
-  EXPECT_CALL(mock, MakeVectorUnique())
-      .WillOnce(Return(ByMove(VectorUniquePtrSource())));
-  Derived* d = new Derived;
-  EXPECT_CALL(mock, MakeUniqueBase())
-      .WillOnce(Return(ByMove(std::unique_ptr<Derived>(d))));
-
-  std::unique_ptr<int> result1 = mock.MakeUnique();
-  EXPECT_EQ(19, *result1);
-
-  std::vector<std::unique_ptr<int>> vresult = mock.MakeVectorUnique();
-  EXPECT_EQ(1u, vresult.size());
-  EXPECT_NE(nullptr, vresult[0]);
-  EXPECT_EQ(7, *vresult[0]);
-
-  std::unique_ptr<Base> result2 = mock.MakeUniqueBase();
-  EXPECT_EQ(d, result2.get());
-}
-
-TEST(MockMethodTest, CanReturnMoveOnlyValue_DoAllReturn) {
-  testing::MockFunction<void()> mock_function;
-  MockClass mock;
-  std::unique_ptr<int> i(new int(19));
-  EXPECT_CALL(mock_function, Call());
-  EXPECT_CALL(mock, MakeUnique()).WillOnce(DoAll(
-      InvokeWithoutArgs(&mock_function, &testing::MockFunction<void()>::Call),
-      Return(ByMove(std::move(i)))));
-
-  std::unique_ptr<int> result1 = mock.MakeUnique();
-  EXPECT_EQ(19, *result1);
-}
-
-TEST(MockMethodTest, CanReturnMoveOnlyValue_Invoke) {
-  MockClass mock;
-
-  // Check default value
-  DefaultValue<std::unique_ptr<int>>::SetFactory([] {
-    return std::unique_ptr<int>(new int(42));
-  });
-  EXPECT_EQ(42, *mock.MakeUnique());
-
-  EXPECT_CALL(mock, MakeUnique()).WillRepeatedly(Invoke(UniquePtrSource));
-  EXPECT_CALL(mock, MakeVectorUnique())
-      .WillRepeatedly(Invoke(VectorUniquePtrSource));
-  std::unique_ptr<int> result1 = mock.MakeUnique();
-  EXPECT_EQ(19, *result1);
-  std::unique_ptr<int> result2 = mock.MakeUnique();
-  EXPECT_EQ(19, *result2);
-  EXPECT_NE(result1, result2);
-
-  std::vector<std::unique_ptr<int>> vresult = mock.MakeVectorUnique();
-  EXPECT_EQ(1u, vresult.size());
-  EXPECT_NE(nullptr, vresult[0]);
-  EXPECT_EQ(7, *vresult[0]);
-}
-
-TEST(MockMethodTest, CanTakeMoveOnlyValue) {
-  MockClass mock;
-  auto make = [](int i) { return std::unique_ptr<int>(new int(i)); };
-
-  EXPECT_CALL(mock, TakeUnique(_)).WillRepeatedly([](std::unique_ptr<int> i) {
-    return *i;
-  });
-  // DoAll() does not compile, since it would move from its arguments twice.
-  // EXPECT_CALL(mock, TakeUnique(_, _))
-  //     .WillRepeatedly(DoAll(Invoke([](std::unique_ptr<int> j) {}),
-  //     Return(1)));
-  EXPECT_CALL(mock, TakeUnique(testing::Pointee(7)))
-      .WillOnce(Return(-7))
-      .RetiresOnSaturation();
-  EXPECT_CALL(mock, TakeUnique(testing::IsNull()))
-      .WillOnce(Return(-1))
-      .RetiresOnSaturation();
-
-  EXPECT_EQ(5, mock.TakeUnique(make(5)));
-  EXPECT_EQ(-7, mock.TakeUnique(make(7)));
-  EXPECT_EQ(7, mock.TakeUnique(make(7)));
-  EXPECT_EQ(7, mock.TakeUnique(make(7)));
-  EXPECT_EQ(-1, mock.TakeUnique({}));
-
-  // Some arguments are moved, some passed by reference.
-  auto lvalue = make(6);
-  EXPECT_CALL(mock, TakeUnique(_, _))
-      .WillOnce([](const std::unique_ptr<int>& i, std::unique_ptr<int> j) {
-        return *i * *j;
-      });
-  EXPECT_EQ(42, mock.TakeUnique(lvalue, make(7)));
-
-  // The unique_ptr can be saved by the action.
-  std::unique_ptr<int> saved;
-  EXPECT_CALL(mock, TakeUnique(_)).WillOnce([&saved](std::unique_ptr<int> i) {
-    saved = std::move(i);
-    return 0;
-  });
-  EXPECT_EQ(0, mock.TakeUnique(make(42)));
-  EXPECT_EQ(42, *saved);
-}
-
-
-// Tests for std::function based action.
-
-int Add(int val, int& ref, int* ptr) {  // NOLINT
-  int result = val + ref + *ptr;
-  ref = 42;
-  *ptr = 43;
-  return result;
-}
-
-int Deref(std::unique_ptr<int> ptr) { return *ptr; }
-
-struct Double {
-  template <typename T>
-  T operator()(T t) { return 2 * t; }
-};
-
-std::unique_ptr<int> UniqueInt(int i) {
-  return std::unique_ptr<int>(new int(i));
-}
-
-TEST(FunctorActionTest, ActionFromFunction) {
-  Action<int(int, int&, int*)> a = &Add;
-  int x = 1, y = 2, z = 3;
-  EXPECT_EQ(6, a.Perform(std::forward_as_tuple(x, y, &z)));
-  EXPECT_EQ(42, y);
-  EXPECT_EQ(43, z);
-
-  Action<int(std::unique_ptr<int>)> a1 = &Deref;
-  EXPECT_EQ(7, a1.Perform(std::make_tuple(UniqueInt(7))));
-}
-
-TEST(FunctorActionTest, ActionFromLambda) {
-  Action<int(bool, int)> a1 = [](bool b, int i) { return b ? i : 0; };
-  EXPECT_EQ(5, a1.Perform(std::make_tuple(true, 5)));
-  EXPECT_EQ(0, a1.Perform(std::make_tuple(false, 5)));
-
-  std::unique_ptr<int> saved;
-  Action<void(std::unique_ptr<int>)> a2 = [&saved](std::unique_ptr<int> p) {
-    saved = std::move(p);
-  };
-  a2.Perform(std::make_tuple(UniqueInt(5)));
-  EXPECT_EQ(5, *saved);
-}
-
-TEST(FunctorActionTest, PolymorphicFunctor) {
-  Action<int(int)> ai = Double();
-  EXPECT_EQ(2, ai.Perform(std::make_tuple(1)));
-  Action<double(double)> ad = Double();  // Double? Double double!
-  EXPECT_EQ(3.0, ad.Perform(std::make_tuple(1.5)));
-}
-
-TEST(FunctorActionTest, TypeConversion) {
-  // Numeric promotions are allowed.
-  const Action<bool(int)> a1 = [](int i) { return i > 1; };
-  const Action<int(bool)> a2 = Action<int(bool)>(a1);
-  EXPECT_EQ(1, a1.Perform(std::make_tuple(42)));
-  EXPECT_EQ(0, a2.Perform(std::make_tuple(42)));
-
-  // Implicit constructors are allowed.
-  const Action<bool(std::string)> s1 = [](std::string s) { return !s.empty(); };
-  const Action<int(const char*)> s2 = Action<int(const char*)>(s1);
-  EXPECT_EQ(0, s2.Perform(std::make_tuple("")));
-  EXPECT_EQ(1, s2.Perform(std::make_tuple("hello")));
-
-  // Also between the lambda and the action itself.
-  const Action<bool(std::string)> x1 = [](Unused) { return 42; };
-  const Action<bool(std::string)> x2 = [] { return 42; };
-  EXPECT_TRUE(x1.Perform(std::make_tuple("hello")));
-  EXPECT_TRUE(x2.Perform(std::make_tuple("hello")));
-
-  // Ensure decay occurs where required.
-  std::function<int()> f = [] { return 7; };
-  Action<int(int)> d = f;
-  f = nullptr;
-  EXPECT_EQ(7, d.Perform(std::make_tuple(1)));
-
-  // Ensure creation of an empty action succeeds.
-  Action<void(int)>(nullptr);
-}
-
-TEST(FunctorActionTest, UnusedArguments) {
-  // Verify that users can ignore uninteresting arguments.
-  Action<int(int, double y, double z)> a =
-      [](int i, Unused, Unused) { return 2 * i; };
-  std::tuple<int, double, double> dummy = std::make_tuple(3, 7.3, 9.44);
-  EXPECT_EQ(6, a.Perform(dummy));
-}
-
-// Test that basic built-in actions work with move-only arguments.
-TEST(MoveOnlyArgumentsTest, ReturningActions) {
-  Action<int(std::unique_ptr<int>)> a = Return(1);
-  EXPECT_EQ(1, a.Perform(std::make_tuple(nullptr)));
-
-  a = testing::WithoutArgs([]() { return 7; });
-  EXPECT_EQ(7, a.Perform(std::make_tuple(nullptr)));
-
-  Action<void(std::unique_ptr<int>, int*)> a2 = testing::SetArgPointee<1>(3);
-  int x = 0;
-  a2.Perform(std::make_tuple(nullptr, &x));
-  EXPECT_EQ(x, 3);
-}
-
-ACTION(ReturnArity) {
-  return std::tuple_size<args_type>::value;
-}
-
-TEST(ActionMacro, LargeArity) {
-  EXPECT_EQ(
-      1, testing::Action<int(int)>(ReturnArity()).Perform(std::make_tuple(0)));
-  EXPECT_EQ(
-      10,
-      testing::Action<int(int, int, int, int, int, int, int, int, int, int)>(
-          ReturnArity())
-          .Perform(std::make_tuple(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)));
-  EXPECT_EQ(
-      20,
-      testing::Action<int(int, int, int, int, int, int, int, int, int, int, int,
-                          int, int, int, int, int, int, int, int, int)>(
-          ReturnArity())
-          .Perform(std::make_tuple(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
-                                   14, 15, 16, 17, 18, 19)));
-}
-
-}  // Unnamed namespace
-
-#ifdef _MSC_VER
-#if _MSC_VER == 1900
-#  pragma warning(pop)
-#endif
-#endif
-
diff --git a/third_party/googletest/googlemock/test/gmock-cardinalities_test.cc b/third_party/googletest/googlemock/test/gmock-cardinalities_test.cc
deleted file mode 100644
index ca97cae..0000000
--- a/third_party/googletest/googlemock/test/gmock-cardinalities_test.cc
+++ /dev/null
@@ -1,429 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the built-in cardinalities.
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-namespace {
-
-using std::stringstream;
-using testing::AnyNumber;
-using testing::AtLeast;
-using testing::AtMost;
-using testing::Between;
-using testing::Cardinality;
-using testing::CardinalityInterface;
-using testing::Exactly;
-using testing::IsSubstring;
-using testing::MakeCardinality;
-
-class MockFoo {
- public:
-  MockFoo() {}
-  MOCK_METHOD0(Bar, int());  // NOLINT
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
-};
-
-// Tests that Cardinality objects can be default constructed.
-TEST(CardinalityTest, IsDefaultConstructable) {
-  Cardinality c;
-}
-
-// Tests that Cardinality objects are copyable.
-TEST(CardinalityTest, IsCopyable) {
-  // Tests the copy constructor.
-  Cardinality c = Exactly(1);
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(0));
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(1));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(1));
-
-  // Tests the assignment operator.
-  c = Exactly(2);
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(1));
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(2));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(2));
-}
-
-TEST(CardinalityTest, IsOverSaturatedByCallCountWorks) {
-  const Cardinality c = AtMost(5);
-  EXPECT_FALSE(c.IsOverSaturatedByCallCount(4));
-  EXPECT_FALSE(c.IsOverSaturatedByCallCount(5));
-  EXPECT_TRUE(c.IsOverSaturatedByCallCount(6));
-}
-
-// Tests that Cardinality::DescribeActualCallCountTo() creates the
-// correct description.
-TEST(CardinalityTest, CanDescribeActualCallCount) {
-  stringstream ss0;
-  Cardinality::DescribeActualCallCountTo(0, &ss0);
-  EXPECT_EQ("never called", ss0.str());
-
-  stringstream ss1;
-  Cardinality::DescribeActualCallCountTo(1, &ss1);
-  EXPECT_EQ("called once", ss1.str());
-
-  stringstream ss2;
-  Cardinality::DescribeActualCallCountTo(2, &ss2);
-  EXPECT_EQ("called twice", ss2.str());
-
-  stringstream ss3;
-  Cardinality::DescribeActualCallCountTo(3, &ss3);
-  EXPECT_EQ("called 3 times", ss3.str());
-}
-
-// Tests AnyNumber()
-TEST(AnyNumber, Works) {
-  const Cardinality c = AnyNumber();
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(1));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(1));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(9));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(9));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called any number of times",
-                      ss.str());
-}
-
-TEST(AnyNumberTest, HasCorrectBounds) {
-  const Cardinality c = AnyNumber();
-  EXPECT_EQ(0, c.ConservativeLowerBound());
-  EXPECT_EQ(INT_MAX, c.ConservativeUpperBound());
-}
-
-// Tests AtLeast(n).
-
-TEST(AtLeastTest, OnNegativeNumber) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    AtLeast(-1);
-  }, "The invocation lower bound must be >= 0");
-}
-
-TEST(AtLeastTest, OnZero) {
-  const Cardinality c = AtLeast(0);
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(1));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(1));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "any number of times",
-                      ss.str());
-}
-
-TEST(AtLeastTest, OnPositiveNumber) {
-  const Cardinality c = AtLeast(2);
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(0));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(1));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(1));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(2));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(2));
-
-  stringstream ss1;
-  AtLeast(1).DescribeTo(&ss1);
-  EXPECT_PRED_FORMAT2(IsSubstring, "at least once",
-                      ss1.str());
-
-  stringstream ss2;
-  c.DescribeTo(&ss2);
-  EXPECT_PRED_FORMAT2(IsSubstring, "at least twice",
-                      ss2.str());
-
-  stringstream ss3;
-  AtLeast(3).DescribeTo(&ss3);
-  EXPECT_PRED_FORMAT2(IsSubstring, "at least 3 times",
-                      ss3.str());
-}
-
-TEST(AtLeastTest, HasCorrectBounds) {
-  const Cardinality c = AtLeast(2);
-  EXPECT_EQ(2, c.ConservativeLowerBound());
-  EXPECT_EQ(INT_MAX, c.ConservativeUpperBound());
-}
-
-// Tests AtMost(n).
-
-TEST(AtMostTest, OnNegativeNumber) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    AtMost(-1);
-  }, "The invocation upper bound must be >= 0");
-}
-
-TEST(AtMostTest, OnZero) {
-  const Cardinality c = AtMost(0);
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(1));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(1));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "never called",
-                      ss.str());
-}
-
-TEST(AtMostTest, OnPositiveNumber) {
-  const Cardinality c = AtMost(2);
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(1));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(1));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(2));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(2));
-
-  stringstream ss1;
-  AtMost(1).DescribeTo(&ss1);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called at most once",
-                      ss1.str());
-
-  stringstream ss2;
-  c.DescribeTo(&ss2);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called at most twice",
-                      ss2.str());
-
-  stringstream ss3;
-  AtMost(3).DescribeTo(&ss3);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called at most 3 times",
-                      ss3.str());
-}
-
-TEST(AtMostTest, HasCorrectBounds) {
-  const Cardinality c = AtMost(2);
-  EXPECT_EQ(0, c.ConservativeLowerBound());
-  EXPECT_EQ(2, c.ConservativeUpperBound());
-}
-
-// Tests Between(m, n).
-
-TEST(BetweenTest, OnNegativeStart) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    Between(-1, 2);
-  }, "The invocation lower bound must be >= 0, but is actually -1");
-}
-
-TEST(BetweenTest, OnNegativeEnd) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    Between(1, -2);
-  }, "The invocation upper bound must be >= 0, but is actually -2");
-}
-
-TEST(BetweenTest, OnStartBiggerThanEnd) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    Between(2, 1);
-  }, "The invocation upper bound (1) must be >= "
-     "the invocation lower bound (2)");
-}
-
-TEST(BetweenTest, OnZeroStartAndZeroEnd) {
-  const Cardinality c = Between(0, 0);
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(1));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(1));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "never called",
-                      ss.str());
-}
-
-TEST(BetweenTest, OnZeroStartAndNonZeroEnd) {
-  const Cardinality c = Between(0, 2);
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(2));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(2));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(4));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(4));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called at most twice",
-                      ss.str());
-}
-
-TEST(BetweenTest, OnSameStartAndEnd) {
-  const Cardinality c = Between(3, 3);
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(2));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(2));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(3));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(3));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(4));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(4));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called 3 times",
-                      ss.str());
-}
-
-TEST(BetweenTest, OnDifferentStartAndEnd) {
-  const Cardinality c = Between(3, 5);
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(2));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(2));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(3));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(3));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(5));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(5));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(6));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(6));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called between 3 and 5 times",
-                      ss.str());
-}
-
-TEST(BetweenTest, HasCorrectBounds) {
-  const Cardinality c = Between(3, 5);
-  EXPECT_EQ(3, c.ConservativeLowerBound());
-  EXPECT_EQ(5, c.ConservativeUpperBound());
-}
-
-// Tests Exactly(n).
-
-TEST(ExactlyTest, OnNegativeNumber) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    Exactly(-1);
-  }, "The invocation lower bound must be >= 0");
-}
-
-TEST(ExactlyTest, OnZero) {
-  const Cardinality c = Exactly(0);
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(0));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(1));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(1));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_PRED_FORMAT2(IsSubstring, "never called",
-                      ss.str());
-}
-
-TEST(ExactlyTest, OnPositiveNumber) {
-  const Cardinality c = Exactly(2);
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(0));
-  EXPECT_FALSE(c.IsSaturatedByCallCount(0));
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(2));
-  EXPECT_TRUE(c.IsSaturatedByCallCount(2));
-
-  stringstream ss1;
-  Exactly(1).DescribeTo(&ss1);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called once",
-                      ss1.str());
-
-  stringstream ss2;
-  c.DescribeTo(&ss2);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called twice",
-                      ss2.str());
-
-  stringstream ss3;
-  Exactly(3).DescribeTo(&ss3);
-  EXPECT_PRED_FORMAT2(IsSubstring, "called 3 times",
-                      ss3.str());
-}
-
-TEST(ExactlyTest, HasCorrectBounds) {
-  const Cardinality c = Exactly(3);
-  EXPECT_EQ(3, c.ConservativeLowerBound());
-  EXPECT_EQ(3, c.ConservativeUpperBound());
-}
-
-// Tests that a user can make their own cardinality by implementing
-// CardinalityInterface and calling MakeCardinality().
-
-class EvenCardinality : public CardinalityInterface {
- public:
-  // Returns true if and only if call_count calls will satisfy this
-  // cardinality.
-  bool IsSatisfiedByCallCount(int call_count) const override {
-    return (call_count % 2 == 0);
-  }
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  bool IsSaturatedByCallCount(int /* call_count */) const override {
-    return false;
-  }
-
-  // Describes self to an ostream.
-  void DescribeTo(::std::ostream* ss) const override {
-    *ss << "called even number of times";
-  }
-};
-
-TEST(MakeCardinalityTest, ConstructsCardinalityFromInterface) {
-  const Cardinality c = MakeCardinality(new EvenCardinality);
-
-  EXPECT_TRUE(c.IsSatisfiedByCallCount(2));
-  EXPECT_FALSE(c.IsSatisfiedByCallCount(3));
-
-  EXPECT_FALSE(c.IsSaturatedByCallCount(10000));
-
-  stringstream ss;
-  c.DescribeTo(&ss);
-  EXPECT_EQ("called even number of times", ss.str());
-}
-
-}  // Unnamed namespace
diff --git a/third_party/googletest/googlemock/test/gmock-function-mocker_test.cc b/third_party/googletest/googlemock/test/gmock-function-mocker_test.cc
deleted file mode 100644
index 45a524e..0000000
--- a/third_party/googletest/googlemock/test/gmock-function-mocker_test.cc
+++ /dev/null
@@ -1,974 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the function mocker classes.
-#include "gmock/gmock-function-mocker.h"
-
-#if GTEST_OS_WINDOWS
-// MSDN says the header file to be included for STDMETHOD is BaseTyps.h but
-// we are getting compiler errors if we use basetyps.h, hence including
-// objbase.h for definition of STDMETHOD.
-# include <objbase.h>
-#endif  // GTEST_OS_WINDOWS
-
-#include <functional>
-#include <map>
-#include <string>
-#include <type_traits>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace gmock_function_mocker_test {
-
-using testing::_;
-using testing::A;
-using testing::An;
-using testing::AnyNumber;
-using testing::Const;
-using testing::DoDefault;
-using testing::Eq;
-using testing::Lt;
-using testing::MockFunction;
-using testing::Ref;
-using testing::Return;
-using testing::ReturnRef;
-using testing::TypedEq;
-
-template<typename T>
-class TemplatedCopyable {
- public:
-  TemplatedCopyable() {}
-
-  template <typename U>
-  TemplatedCopyable(const U& other) {}  // NOLINT
-};
-
-class FooInterface {
- public:
-  virtual ~FooInterface() {}
-
-  virtual void VoidReturning(int x) = 0;
-
-  virtual int Nullary() = 0;
-  virtual bool Unary(int x) = 0;
-  virtual long Binary(short x, int y) = 0;  // NOLINT
-  virtual int Decimal(bool b, char c, short d, int e, long f,  // NOLINT
-                      float g, double h, unsigned i, char* j,
-                      const std::string& k) = 0;
-
-  virtual bool TakesNonConstReference(int& n) = 0;  // NOLINT
-  virtual std::string TakesConstReference(const int& n) = 0;
-  virtual bool TakesConst(const int x) = 0;
-
-  virtual int OverloadedOnArgumentNumber() = 0;
-  virtual int OverloadedOnArgumentNumber(int n) = 0;
-
-  virtual int OverloadedOnArgumentType(int n) = 0;
-  virtual char OverloadedOnArgumentType(char c) = 0;
-
-  virtual int OverloadedOnConstness() = 0;
-  virtual char OverloadedOnConstness() const = 0;
-
-  virtual int TypeWithHole(int (*func)()) = 0;
-  virtual int TypeWithComma(const std::map<int, std::string>& a_map) = 0;
-  virtual int TypeWithTemplatedCopyCtor(const TemplatedCopyable<int>&) = 0;
-
-  virtual int (*ReturnsFunctionPointer1(int))(bool) = 0;
-  using fn_ptr = int (*)(bool);
-  virtual fn_ptr ReturnsFunctionPointer2(int) = 0;
-
-  virtual int RefQualifiedConstRef() const& = 0;
-  virtual int RefQualifiedConstRefRef() const&& = 0;
-  virtual int RefQualifiedRef() & = 0;
-  virtual int RefQualifiedRefRef() && = 0;
-
-  virtual int RefQualifiedOverloaded() const& = 0;
-  virtual int RefQualifiedOverloaded() const&& = 0;
-  virtual int RefQualifiedOverloaded() & = 0;
-  virtual int RefQualifiedOverloaded() && = 0;
-
-#if GTEST_OS_WINDOWS
-  STDMETHOD_(int, CTNullary)() = 0;
-  STDMETHOD_(bool, CTUnary)(int x) = 0;
-  STDMETHOD_(int, CTDecimal)
-  (bool b, char c, short d, int e, long f,  // NOLINT
-   float g, double h, unsigned i, char* j, const std::string& k) = 0;
-  STDMETHOD_(char, CTConst)(int x) const = 0;
-#endif  // GTEST_OS_WINDOWS
-};
-
-// Const qualifiers on arguments were once (incorrectly) considered
-// significant in determining whether two virtual functions had the same
-// signature. This was fixed in Visual Studio 2008. However, the compiler
-// still emits a warning that alerts about this change in behavior.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable : 4373)
-#endif
-class MockFoo : public FooInterface {
- public:
-  MockFoo() {}
-
-  // Makes sure that a mock function parameter can be named.
-  MOCK_METHOD(void, VoidReturning, (int n));  // NOLINT
-
-  MOCK_METHOD(int, Nullary, ());  // NOLINT
-
-  // Makes sure that a mock function parameter can be unnamed.
-  MOCK_METHOD(bool, Unary, (int));          // NOLINT
-  MOCK_METHOD(long, Binary, (short, int));  // NOLINT
-  MOCK_METHOD(int, Decimal,
-              (bool, char, short, int, long, float,  // NOLINT
-               double, unsigned, char*, const std::string& str),
-              (override));
-
-  MOCK_METHOD(bool, TakesNonConstReference, (int&));  // NOLINT
-  MOCK_METHOD(std::string, TakesConstReference, (const int&));
-  MOCK_METHOD(bool, TakesConst, (const int));  // NOLINT
-
-  // Tests that the function return type can contain unprotected comma.
-  MOCK_METHOD((std::map<int, std::string>), ReturnTypeWithComma, (), ());
-  MOCK_METHOD((std::map<int, std::string>), ReturnTypeWithComma, (int),
-              (const));  // NOLINT
-
-  MOCK_METHOD(int, OverloadedOnArgumentNumber, ());     // NOLINT
-  MOCK_METHOD(int, OverloadedOnArgumentNumber, (int));  // NOLINT
-
-  MOCK_METHOD(int, OverloadedOnArgumentType, (int));    // NOLINT
-  MOCK_METHOD(char, OverloadedOnArgumentType, (char));  // NOLINT
-
-  MOCK_METHOD(int, OverloadedOnConstness, (), (override));          // NOLINT
-  MOCK_METHOD(char, OverloadedOnConstness, (), (override, const));  // NOLINT
-
-  MOCK_METHOD(int, TypeWithHole, (int (*)()), ());  // NOLINT
-  MOCK_METHOD(int, TypeWithComma, ((const std::map<int, std::string>&)));
-  MOCK_METHOD(int, TypeWithTemplatedCopyCtor,
-              (const TemplatedCopyable<int>&));  // NOLINT
-
-  MOCK_METHOD(int (*)(bool), ReturnsFunctionPointer1, (int), ());
-  MOCK_METHOD(fn_ptr, ReturnsFunctionPointer2, (int), ());
-
-#if GTEST_OS_WINDOWS
-  MOCK_METHOD(int, CTNullary, (), (Calltype(STDMETHODCALLTYPE)));
-  MOCK_METHOD(bool, CTUnary, (int), (Calltype(STDMETHODCALLTYPE)));
-  MOCK_METHOD(int, CTDecimal,
-              (bool b, char c, short d, int e, long f, float g, double h,
-               unsigned i, char* j, const std::string& k),
-              (Calltype(STDMETHODCALLTYPE)));
-  MOCK_METHOD(char, CTConst, (int), (const, Calltype(STDMETHODCALLTYPE)));
-  MOCK_METHOD((std::map<int, std::string>), CTReturnTypeWithComma, (),
-              (Calltype(STDMETHODCALLTYPE)));
-#endif  // GTEST_OS_WINDOWS
-
-  // Test reference qualified functions.
-  MOCK_METHOD(int, RefQualifiedConstRef, (), (const, ref(&), override));
-  MOCK_METHOD(int, RefQualifiedConstRefRef, (), (const, ref(&&), override));
-  MOCK_METHOD(int, RefQualifiedRef, (), (ref(&), override));
-  MOCK_METHOD(int, RefQualifiedRefRef, (), (ref(&&), override));
-
-  MOCK_METHOD(int, RefQualifiedOverloaded, (), (const, ref(&), override));
-  MOCK_METHOD(int, RefQualifiedOverloaded, (), (const, ref(&&), override));
-  MOCK_METHOD(int, RefQualifiedOverloaded, (), (ref(&), override));
-  MOCK_METHOD(int, RefQualifiedOverloaded, (), (ref(&&), override));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
-};
-
-class LegacyMockFoo : public FooInterface {
- public:
-  LegacyMockFoo() {}
-
-  // Makes sure that a mock function parameter can be named.
-  MOCK_METHOD1(VoidReturning, void(int n));  // NOLINT
-
-  MOCK_METHOD0(Nullary, int());  // NOLINT
-
-  // Makes sure that a mock function parameter can be unnamed.
-  MOCK_METHOD1(Unary, bool(int));                                  // NOLINT
-  MOCK_METHOD2(Binary, long(short, int));                          // NOLINT
-  MOCK_METHOD10(Decimal, int(bool, char, short, int, long, float,  // NOLINT
-                             double, unsigned, char*, const std::string& str));
-
-  MOCK_METHOD1(TakesNonConstReference, bool(int&));  // NOLINT
-  MOCK_METHOD1(TakesConstReference, std::string(const int&));
-  MOCK_METHOD1(TakesConst, bool(const int));  // NOLINT
-
-  // Tests that the function return type can contain unprotected comma.
-  MOCK_METHOD0(ReturnTypeWithComma, std::map<int, std::string>());
-  MOCK_CONST_METHOD1(ReturnTypeWithComma,
-                     std::map<int, std::string>(int));  // NOLINT
-
-  MOCK_METHOD0(OverloadedOnArgumentNumber, int());     // NOLINT
-  MOCK_METHOD1(OverloadedOnArgumentNumber, int(int));  // NOLINT
-
-  MOCK_METHOD1(OverloadedOnArgumentType, int(int));    // NOLINT
-  MOCK_METHOD1(OverloadedOnArgumentType, char(char));  // NOLINT
-
-  MOCK_METHOD0(OverloadedOnConstness, int());         // NOLINT
-  MOCK_CONST_METHOD0(OverloadedOnConstness, char());  // NOLINT
-
-  MOCK_METHOD1(TypeWithHole, int(int (*)()));  // NOLINT
-  MOCK_METHOD1(TypeWithComma,
-               int(const std::map<int, std::string>&));  // NOLINT
-  MOCK_METHOD1(TypeWithTemplatedCopyCtor,
-               int(const TemplatedCopyable<int>&));  // NOLINT
-
-  MOCK_METHOD1(ReturnsFunctionPointer1, int (*(int))(bool));
-  MOCK_METHOD1(ReturnsFunctionPointer2, fn_ptr(int));
-
-#if GTEST_OS_WINDOWS
-  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, CTNullary, int());
-  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, CTUnary, bool(int));  // NOLINT
-  MOCK_METHOD10_WITH_CALLTYPE(STDMETHODCALLTYPE, CTDecimal,
-                              int(bool b, char c, short d, int e,  // NOLINT
-                                  long f, float g, double h,       // NOLINT
-                                  unsigned i, char* j, const std::string& k));
-  MOCK_CONST_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, CTConst,
-                                   char(int));  // NOLINT
-
-  // Tests that the function return type can contain unprotected comma.
-  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, CTReturnTypeWithComma,
-                             std::map<int, std::string>());
-#endif  // GTEST_OS_WINDOWS
-
-  // We can't mock these with the old macros, but we need to define them to make
-  // it concrete.
-  int RefQualifiedConstRef() const& override { return 0; }
-  int RefQualifiedConstRefRef() const&& override { return 0; }
-  int RefQualifiedRef() & override { return 0; }
-  int RefQualifiedRefRef() && override { return 0; }
-  int RefQualifiedOverloaded() const& override { return 0; }
-  int RefQualifiedOverloaded() const&& override { return 0; }
-  int RefQualifiedOverloaded() & override { return 0; }
-  int RefQualifiedOverloaded() && override { return 0; }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(LegacyMockFoo);
-};
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-template <class T>
-class FunctionMockerTest : public testing::Test {
- protected:
-  FunctionMockerTest() : foo_(&mock_foo_) {}
-
-  FooInterface* const foo_;
-  T mock_foo_;
-};
-using FunctionMockerTestTypes = ::testing::Types<MockFoo, LegacyMockFoo>;
-TYPED_TEST_SUITE(FunctionMockerTest, FunctionMockerTestTypes);
-
-// Tests mocking a void-returning function.
-TYPED_TEST(FunctionMockerTest, MocksVoidFunction) {
-  EXPECT_CALL(this->mock_foo_, VoidReturning(Lt(100)));
-  this->foo_->VoidReturning(0);
-}
-
-// Tests mocking a nullary function.
-TYPED_TEST(FunctionMockerTest, MocksNullaryFunction) {
-  EXPECT_CALL(this->mock_foo_, Nullary())
-      .WillOnce(DoDefault())
-      .WillOnce(Return(1));
-
-  EXPECT_EQ(0, this->foo_->Nullary());
-  EXPECT_EQ(1, this->foo_->Nullary());
-}
-
-// Tests mocking a unary function.
-TYPED_TEST(FunctionMockerTest, MocksUnaryFunction) {
-  EXPECT_CALL(this->mock_foo_, Unary(Eq(2))).Times(2).WillOnce(Return(true));
-
-  EXPECT_TRUE(this->foo_->Unary(2));
-  EXPECT_FALSE(this->foo_->Unary(2));
-}
-
-// Tests mocking a binary function.
-TYPED_TEST(FunctionMockerTest, MocksBinaryFunction) {
-  EXPECT_CALL(this->mock_foo_, Binary(2, _)).WillOnce(Return(3));
-
-  EXPECT_EQ(3, this->foo_->Binary(2, 1));
-}
-
-// Tests mocking a decimal function.
-TYPED_TEST(FunctionMockerTest, MocksDecimalFunction) {
-  EXPECT_CALL(this->mock_foo_,
-              Decimal(true, 'a', 0, 0, 1L, A<float>(), Lt(100), 5U, NULL, "hi"))
-      .WillOnce(Return(5));
-
-  EXPECT_EQ(5, this->foo_->Decimal(true, 'a', 0, 0, 1, 0, 0, 5, nullptr, "hi"));
-}
-
-// Tests mocking a function that takes a non-const reference.
-TYPED_TEST(FunctionMockerTest, MocksFunctionWithNonConstReferenceArgument) {
-  int a = 0;
-  EXPECT_CALL(this->mock_foo_, TakesNonConstReference(Ref(a)))
-      .WillOnce(Return(true));
-
-  EXPECT_TRUE(this->foo_->TakesNonConstReference(a));
-}
-
-// Tests mocking a function that takes a const reference.
-TYPED_TEST(FunctionMockerTest, MocksFunctionWithConstReferenceArgument) {
-  int a = 0;
-  EXPECT_CALL(this->mock_foo_, TakesConstReference(Ref(a)))
-      .WillOnce(Return("Hello"));
-
-  EXPECT_EQ("Hello", this->foo_->TakesConstReference(a));
-}
-
-// Tests mocking a function that takes a const variable.
-TYPED_TEST(FunctionMockerTest, MocksFunctionWithConstArgument) {
-  EXPECT_CALL(this->mock_foo_, TakesConst(Lt(10))).WillOnce(DoDefault());
-
-  EXPECT_FALSE(this->foo_->TakesConst(5));
-}
-
-// Tests mocking functions overloaded on the number of arguments.
-TYPED_TEST(FunctionMockerTest, MocksFunctionsOverloadedOnArgumentNumber) {
-  EXPECT_CALL(this->mock_foo_, OverloadedOnArgumentNumber())
-      .WillOnce(Return(1));
-  EXPECT_CALL(this->mock_foo_, OverloadedOnArgumentNumber(_))
-      .WillOnce(Return(2));
-
-  EXPECT_EQ(2, this->foo_->OverloadedOnArgumentNumber(1));
-  EXPECT_EQ(1, this->foo_->OverloadedOnArgumentNumber());
-}
-
-// Tests mocking functions overloaded on the types of argument.
-TYPED_TEST(FunctionMockerTest, MocksFunctionsOverloadedOnArgumentType) {
-  EXPECT_CALL(this->mock_foo_, OverloadedOnArgumentType(An<int>()))
-      .WillOnce(Return(1));
-  EXPECT_CALL(this->mock_foo_, OverloadedOnArgumentType(TypedEq<char>('a')))
-      .WillOnce(Return('b'));
-
-  EXPECT_EQ(1, this->foo_->OverloadedOnArgumentType(0));
-  EXPECT_EQ('b', this->foo_->OverloadedOnArgumentType('a'));
-}
-
-// Tests mocking functions overloaded on the const-ness of this object.
-TYPED_TEST(FunctionMockerTest, MocksFunctionsOverloadedOnConstnessOfThis) {
-  EXPECT_CALL(this->mock_foo_, OverloadedOnConstness());
-  EXPECT_CALL(Const(this->mock_foo_), OverloadedOnConstness())
-      .WillOnce(Return('a'));
-
-  EXPECT_EQ(0, this->foo_->OverloadedOnConstness());
-  EXPECT_EQ('a', Const(*this->foo_).OverloadedOnConstness());
-}
-
-TYPED_TEST(FunctionMockerTest, MocksReturnTypeWithComma) {
-  const std::map<int, std::string> a_map;
-  EXPECT_CALL(this->mock_foo_, ReturnTypeWithComma()).WillOnce(Return(a_map));
-  EXPECT_CALL(this->mock_foo_, ReturnTypeWithComma(42)).WillOnce(Return(a_map));
-
-  EXPECT_EQ(a_map, this->mock_foo_.ReturnTypeWithComma());
-  EXPECT_EQ(a_map, this->mock_foo_.ReturnTypeWithComma(42));
-}
-
-TYPED_TEST(FunctionMockerTest, MocksTypeWithTemplatedCopyCtor) {
-  EXPECT_CALL(this->mock_foo_, TypeWithTemplatedCopyCtor(_))
-      .WillOnce(Return(true));
-  EXPECT_TRUE(this->foo_->TypeWithTemplatedCopyCtor(TemplatedCopyable<int>()));
-}
-
-#if GTEST_OS_WINDOWS
-// Tests mocking a nullary function with calltype.
-TYPED_TEST(FunctionMockerTest, MocksNullaryFunctionWithCallType) {
-  EXPECT_CALL(this->mock_foo_, CTNullary())
-      .WillOnce(Return(-1))
-      .WillOnce(Return(0));
-
-  EXPECT_EQ(-1, this->foo_->CTNullary());
-  EXPECT_EQ(0, this->foo_->CTNullary());
-}
-
-// Tests mocking a unary function with calltype.
-TYPED_TEST(FunctionMockerTest, MocksUnaryFunctionWithCallType) {
-  EXPECT_CALL(this->mock_foo_, CTUnary(Eq(2)))
-      .Times(2)
-      .WillOnce(Return(true))
-      .WillOnce(Return(false));
-
-  EXPECT_TRUE(this->foo_->CTUnary(2));
-  EXPECT_FALSE(this->foo_->CTUnary(2));
-}
-
-// Tests mocking a decimal function with calltype.
-TYPED_TEST(FunctionMockerTest, MocksDecimalFunctionWithCallType) {
-  EXPECT_CALL(this->mock_foo_, CTDecimal(true, 'a', 0, 0, 1L, A<float>(),
-                                         Lt(100), 5U, NULL, "hi"))
-      .WillOnce(Return(10));
-
-  EXPECT_EQ(10, this->foo_->CTDecimal(true, 'a', 0, 0, 1, 0, 0, 5, NULL, "hi"));
-}
-
-// Tests mocking functions overloaded on the const-ness of this object.
-TYPED_TEST(FunctionMockerTest, MocksFunctionsConstFunctionWithCallType) {
-  EXPECT_CALL(Const(this->mock_foo_), CTConst(_)).WillOnce(Return('a'));
-
-  EXPECT_EQ('a', Const(*this->foo_).CTConst(0));
-}
-
-TYPED_TEST(FunctionMockerTest, MocksReturnTypeWithCommaAndCallType) {
-  const std::map<int, std::string> a_map;
-  EXPECT_CALL(this->mock_foo_, CTReturnTypeWithComma()).WillOnce(Return(a_map));
-
-  EXPECT_EQ(a_map, this->mock_foo_.CTReturnTypeWithComma());
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-TEST(FunctionMockerTest, RefQualified) {
-  MockFoo mock_foo;
-
-  EXPECT_CALL(mock_foo, RefQualifiedConstRef).WillOnce(Return(1));
-  EXPECT_CALL(std::move(mock_foo),  // NOLINT
-              RefQualifiedConstRefRef)
-      .WillOnce(Return(2));
-  EXPECT_CALL(mock_foo, RefQualifiedRef).WillOnce(Return(3));
-  EXPECT_CALL(std::move(mock_foo),  // NOLINT
-              RefQualifiedRefRef)
-      .WillOnce(Return(4));
-
-  EXPECT_CALL(static_cast<const MockFoo&>(mock_foo), RefQualifiedOverloaded())
-      .WillOnce(Return(5));
-  EXPECT_CALL(static_cast<const MockFoo&&>(mock_foo), RefQualifiedOverloaded())
-      .WillOnce(Return(6));
-  EXPECT_CALL(static_cast<MockFoo&>(mock_foo), RefQualifiedOverloaded())
-      .WillOnce(Return(7));
-  EXPECT_CALL(static_cast<MockFoo&&>(mock_foo), RefQualifiedOverloaded())
-      .WillOnce(Return(8));
-
-  EXPECT_EQ(mock_foo.RefQualifiedConstRef(), 1);
-  EXPECT_EQ(std::move(mock_foo).RefQualifiedConstRefRef(), 2);  // NOLINT
-  EXPECT_EQ(mock_foo.RefQualifiedRef(), 3);
-  EXPECT_EQ(std::move(mock_foo).RefQualifiedRefRef(), 4);  // NOLINT
-
-  EXPECT_EQ(std::cref(mock_foo).get().RefQualifiedOverloaded(), 5);
-  EXPECT_EQ(std::move(std::cref(mock_foo).get())  // NOLINT
-                .RefQualifiedOverloaded(),
-            6);
-  EXPECT_EQ(mock_foo.RefQualifiedOverloaded(), 7);
-  EXPECT_EQ(std::move(mock_foo).RefQualifiedOverloaded(), 8);  // NOLINT
-}
-
-class MockB {
- public:
-  MockB() {}
-
-  MOCK_METHOD(void, DoB, ());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockB);
-};
-
-class LegacyMockB {
- public:
-  LegacyMockB() {}
-
-  MOCK_METHOD0(DoB, void());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(LegacyMockB);
-};
-
-template <typename T>
-class ExpectCallTest : public ::testing::Test {};
-using ExpectCallTestTypes = ::testing::Types<MockB, LegacyMockB>;
-TYPED_TEST_SUITE(ExpectCallTest, ExpectCallTestTypes);
-
-// Tests that functions with no EXPECT_CALL() rules can be called any
-// number of times.
-TYPED_TEST(ExpectCallTest, UnmentionedFunctionCanBeCalledAnyNumberOfTimes) {
-  { TypeParam b; }
-
-  {
-    TypeParam b;
-    b.DoB();
-  }
-
-  {
-    TypeParam b;
-    b.DoB();
-    b.DoB();
-  }
-}
-
-// Tests mocking template interfaces.
-
-template <typename T>
-class StackInterface {
- public:
-  virtual ~StackInterface() {}
-
-  // Template parameter appears in function parameter.
-  virtual void Push(const T& value) = 0;
-  virtual void Pop() = 0;
-  virtual int GetSize() const = 0;
-  // Template parameter appears in function return type.
-  virtual const T& GetTop() const = 0;
-};
-
-template <typename T>
-class MockStack : public StackInterface<T> {
- public:
-  MockStack() {}
-
-  MOCK_METHOD(void, Push, (const T& elem), ());
-  MOCK_METHOD(void, Pop, (), (final));
-  MOCK_METHOD(int, GetSize, (), (const, override));
-  MOCK_METHOD(const T&, GetTop, (), (const));
-
-  // Tests that the function return type can contain unprotected comma.
-  MOCK_METHOD((std::map<int, int>), ReturnTypeWithComma, (), ());
-  MOCK_METHOD((std::map<int, int>), ReturnTypeWithComma, (int), (const));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockStack);
-};
-
-template <typename T>
-class LegacyMockStack : public StackInterface<T> {
- public:
-  LegacyMockStack() {}
-
-  MOCK_METHOD1_T(Push, void(const T& elem));
-  MOCK_METHOD0_T(Pop, void());
-  MOCK_CONST_METHOD0_T(GetSize, int());  // NOLINT
-  MOCK_CONST_METHOD0_T(GetTop, const T&());
-
-  // Tests that the function return type can contain unprotected comma.
-  MOCK_METHOD0_T(ReturnTypeWithComma, std::map<int, int>());
-  MOCK_CONST_METHOD1_T(ReturnTypeWithComma, std::map<int, int>(int));  // NOLINT
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(LegacyMockStack);
-};
-
-template <typename T>
-class TemplateMockTest : public ::testing::Test {};
-using TemplateMockTestTypes =
-    ::testing::Types<MockStack<int>, LegacyMockStack<int>>;
-TYPED_TEST_SUITE(TemplateMockTest, TemplateMockTestTypes);
-
-// Tests that template mock works.
-TYPED_TEST(TemplateMockTest, Works) {
-  TypeParam mock;
-
-  EXPECT_CALL(mock, GetSize())
-      .WillOnce(Return(0))
-      .WillOnce(Return(1))
-      .WillOnce(Return(0));
-  EXPECT_CALL(mock, Push(_));
-  int n = 5;
-  EXPECT_CALL(mock, GetTop())
-      .WillOnce(ReturnRef(n));
-  EXPECT_CALL(mock, Pop())
-      .Times(AnyNumber());
-
-  EXPECT_EQ(0, mock.GetSize());
-  mock.Push(5);
-  EXPECT_EQ(1, mock.GetSize());
-  EXPECT_EQ(5, mock.GetTop());
-  mock.Pop();
-  EXPECT_EQ(0, mock.GetSize());
-}
-
-TYPED_TEST(TemplateMockTest, MethodWithCommaInReturnTypeWorks) {
-  TypeParam mock;
-
-  const std::map<int, int> a_map;
-  EXPECT_CALL(mock, ReturnTypeWithComma())
-      .WillOnce(Return(a_map));
-  EXPECT_CALL(mock, ReturnTypeWithComma(1))
-      .WillOnce(Return(a_map));
-
-  EXPECT_EQ(a_map, mock.ReturnTypeWithComma());
-  EXPECT_EQ(a_map, mock.ReturnTypeWithComma(1));
-}
-
-#if GTEST_OS_WINDOWS
-// Tests mocking template interfaces with calltype.
-
-template <typename T>
-class StackInterfaceWithCallType {
- public:
-  virtual ~StackInterfaceWithCallType() {}
-
-  // Template parameter appears in function parameter.
-  STDMETHOD_(void, Push)(const T& value) = 0;
-  STDMETHOD_(void, Pop)() = 0;
-  STDMETHOD_(int, GetSize)() const = 0;
-  // Template parameter appears in function return type.
-  STDMETHOD_(const T&, GetTop)() const = 0;
-};
-
-template <typename T>
-class MockStackWithCallType : public StackInterfaceWithCallType<T> {
- public:
-  MockStackWithCallType() {}
-
-  MOCK_METHOD(void, Push, (const T& elem),
-              (Calltype(STDMETHODCALLTYPE), override));
-  MOCK_METHOD(void, Pop, (), (Calltype(STDMETHODCALLTYPE), override));
-  MOCK_METHOD(int, GetSize, (), (Calltype(STDMETHODCALLTYPE), override, const));
-  MOCK_METHOD(const T&, GetTop, (),
-              (Calltype(STDMETHODCALLTYPE), override, const));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockStackWithCallType);
-};
-
-template <typename T>
-class LegacyMockStackWithCallType : public StackInterfaceWithCallType<T> {
- public:
-  LegacyMockStackWithCallType() {}
-
-  MOCK_METHOD1_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Push, void(const T& elem));
-  MOCK_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Pop, void());
-  MOCK_CONST_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, GetSize, int());
-  MOCK_CONST_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, GetTop, const T&());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(LegacyMockStackWithCallType);
-};
-
-template <typename T>
-class TemplateMockTestWithCallType : public ::testing::Test {};
-using TemplateMockTestWithCallTypeTypes =
-    ::testing::Types<MockStackWithCallType<int>,
-                     LegacyMockStackWithCallType<int>>;
-TYPED_TEST_SUITE(TemplateMockTestWithCallType,
-                 TemplateMockTestWithCallTypeTypes);
-
-// Tests that template mock with calltype works.
-TYPED_TEST(TemplateMockTestWithCallType, Works) {
-  TypeParam mock;
-
-  EXPECT_CALL(mock, GetSize())
-      .WillOnce(Return(0))
-      .WillOnce(Return(1))
-      .WillOnce(Return(0));
-  EXPECT_CALL(mock, Push(_));
-  int n = 5;
-  EXPECT_CALL(mock, GetTop())
-      .WillOnce(ReturnRef(n));
-  EXPECT_CALL(mock, Pop())
-      .Times(AnyNumber());
-
-  EXPECT_EQ(0, mock.GetSize());
-  mock.Push(5);
-  EXPECT_EQ(1, mock.GetSize());
-  EXPECT_EQ(5, mock.GetTop());
-  mock.Pop();
-  EXPECT_EQ(0, mock.GetSize());
-}
-#endif  // GTEST_OS_WINDOWS
-
-#define MY_MOCK_METHODS1_                       \
-  MOCK_METHOD(void, Overloaded, ());            \
-  MOCK_METHOD(int, Overloaded, (int), (const)); \
-  MOCK_METHOD(bool, Overloaded, (bool f, int n))
-
-#define LEGACY_MY_MOCK_METHODS1_              \
-  MOCK_METHOD0(Overloaded, void());           \
-  MOCK_CONST_METHOD1(Overloaded, int(int n)); \
-  MOCK_METHOD2(Overloaded, bool(bool f, int n))
-
-class MockOverloadedOnArgNumber {
- public:
-  MockOverloadedOnArgNumber() {}
-
-  MY_MOCK_METHODS1_;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockOverloadedOnArgNumber);
-};
-
-class LegacyMockOverloadedOnArgNumber {
- public:
-  LegacyMockOverloadedOnArgNumber() {}
-
-  LEGACY_MY_MOCK_METHODS1_;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(LegacyMockOverloadedOnArgNumber);
-};
-
-template <typename T>
-class OverloadedMockMethodTest : public ::testing::Test {};
-using OverloadedMockMethodTestTypes =
-    ::testing::Types<MockOverloadedOnArgNumber,
-                     LegacyMockOverloadedOnArgNumber>;
-TYPED_TEST_SUITE(OverloadedMockMethodTest, OverloadedMockMethodTestTypes);
-
-TYPED_TEST(OverloadedMockMethodTest, CanOverloadOnArgNumberInMacroBody) {
-  TypeParam mock;
-  EXPECT_CALL(mock, Overloaded());
-  EXPECT_CALL(mock, Overloaded(1)).WillOnce(Return(2));
-  EXPECT_CALL(mock, Overloaded(true, 1)).WillOnce(Return(true));
-
-  mock.Overloaded();
-  EXPECT_EQ(2, mock.Overloaded(1));
-  EXPECT_TRUE(mock.Overloaded(true, 1));
-}
-
-#define MY_MOCK_METHODS2_ \
-    MOCK_CONST_METHOD1(Overloaded, int(int n)); \
-    MOCK_METHOD1(Overloaded, int(int n))
-
-class MockOverloadedOnConstness {
- public:
-  MockOverloadedOnConstness() {}
-
-  MY_MOCK_METHODS2_;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockOverloadedOnConstness);
-};
-
-TEST(MockMethodOverloadedMockMethodTest, CanOverloadOnConstnessInMacroBody) {
-  MockOverloadedOnConstness mock;
-  const MockOverloadedOnConstness* const_mock = &mock;
-  EXPECT_CALL(mock, Overloaded(1)).WillOnce(Return(2));
-  EXPECT_CALL(*const_mock, Overloaded(1)).WillOnce(Return(3));
-
-  EXPECT_EQ(2, mock.Overloaded(1));
-  EXPECT_EQ(3, const_mock->Overloaded(1));
-}
-
-TEST(MockMethodMockFunctionTest, WorksForVoidNullary) {
-  MockFunction<void()> foo;
-  EXPECT_CALL(foo, Call());
-  foo.Call();
-}
-
-TEST(MockMethodMockFunctionTest, WorksForNonVoidNullary) {
-  MockFunction<int()> foo;
-  EXPECT_CALL(foo, Call())
-      .WillOnce(Return(1))
-      .WillOnce(Return(2));
-  EXPECT_EQ(1, foo.Call());
-  EXPECT_EQ(2, foo.Call());
-}
-
-TEST(MockMethodMockFunctionTest, WorksForVoidUnary) {
-  MockFunction<void(int)> foo;
-  EXPECT_CALL(foo, Call(1));
-  foo.Call(1);
-}
-
-TEST(MockMethodMockFunctionTest, WorksForNonVoidBinary) {
-  MockFunction<int(bool, int)> foo;
-  EXPECT_CALL(foo, Call(false, 42))
-      .WillOnce(Return(1))
-      .WillOnce(Return(2));
-  EXPECT_CALL(foo, Call(true, Ge(100)))
-      .WillOnce(Return(3));
-  EXPECT_EQ(1, foo.Call(false, 42));
-  EXPECT_EQ(2, foo.Call(false, 42));
-  EXPECT_EQ(3, foo.Call(true, 120));
-}
-
-TEST(MockMethodMockFunctionTest, WorksFor10Arguments) {
-  MockFunction<int(bool a0, char a1, int a2, int a3, int a4,
-                   int a5, int a6, char a7, int a8, bool a9)> foo;
-  EXPECT_CALL(foo, Call(_, 'a', _, _, _, _, _, _, _, _))
-      .WillOnce(Return(1))
-      .WillOnce(Return(2));
-  EXPECT_EQ(1, foo.Call(false, 'a', 0, 0, 0, 0, 0, 'b', 0, true));
-  EXPECT_EQ(2, foo.Call(true, 'a', 0, 0, 0, 0, 0, 'b', 1, false));
-}
-
-TEST(MockMethodMockFunctionTest, AsStdFunction) {
-  MockFunction<int(int)> foo;
-  auto call = [](const std::function<int(int)> &f, int i) {
-    return f(i);
-  };
-  EXPECT_CALL(foo, Call(1)).WillOnce(Return(-1));
-  EXPECT_CALL(foo, Call(2)).WillOnce(Return(-2));
-  EXPECT_EQ(-1, call(foo.AsStdFunction(), 1));
-  EXPECT_EQ(-2, call(foo.AsStdFunction(), 2));
-}
-
-TEST(MockMethodMockFunctionTest, AsStdFunctionReturnsReference) {
-  MockFunction<int&()> foo;
-  int value = 1;
-  EXPECT_CALL(foo, Call()).WillOnce(ReturnRef(value));
-  int& ref = foo.AsStdFunction()();
-  EXPECT_EQ(1, ref);
-  value = 2;
-  EXPECT_EQ(2, ref);
-}
-
-TEST(MockMethodMockFunctionTest, AsStdFunctionWithReferenceParameter) {
-  MockFunction<int(int &)> foo;
-  auto call = [](const std::function<int(int& )> &f, int &i) {
-    return f(i);
-  };
-  int i = 42;
-  EXPECT_CALL(foo, Call(i)).WillOnce(Return(-1));
-  EXPECT_EQ(-1, call(foo.AsStdFunction(), i));
-}
-
-namespace {
-
-template <typename Expected, typename F>
-static constexpr bool IsMockFunctionTemplateArgumentDeducedTo(
-    const MockFunction<F>&) {
-  return std::is_same<F, Expected>::value;
-}
-
-}  // namespace
-
-template <typename F>
-class MockMethodMockFunctionSignatureTest : public Test {};
-
-using MockMethodMockFunctionSignatureTypes =
-    Types<void(), int(), void(int), int(int), int(bool, int),
-          int(bool, char, int, int, int, int, int, char, int, bool)>;
-TYPED_TEST_SUITE(MockMethodMockFunctionSignatureTest,
-                 MockMethodMockFunctionSignatureTypes);
-
-TYPED_TEST(MockMethodMockFunctionSignatureTest,
-           IsMockFunctionTemplateArgumentDeducedForRawSignature) {
-  using Argument = TypeParam;
-  MockFunction<Argument> foo;
-  EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<Argument>(foo));
-}
-
-TYPED_TEST(MockMethodMockFunctionSignatureTest,
-           IsMockFunctionTemplateArgumentDeducedForStdFunction) {
-  using Argument = std::function<TypeParam>;
-  MockFunction<Argument> foo;
-  EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<Argument>(foo));
-}
-
-TYPED_TEST(
-    MockMethodMockFunctionSignatureTest,
-    IsMockFunctionCallMethodSignatureTheSameForRawSignatureAndStdFunction) {
-  using ForRawSignature = decltype(&MockFunction<TypeParam>::Call);
-  using ForStdFunction =
-      decltype(&MockFunction<std::function<TypeParam>>::Call);
-  EXPECT_TRUE((std::is_same<ForRawSignature, ForStdFunction>::value));
-}
-
-TYPED_TEST(
-    MockMethodMockFunctionSignatureTest,
-    IsMockFunctionAsStdFunctionMethodSignatureTheSameForRawSignatureAndStdFunction) {
-  using ForRawSignature = decltype(&MockFunction<TypeParam>::AsStdFunction);
-  using ForStdFunction =
-      decltype(&MockFunction<std::function<TypeParam>>::AsStdFunction);
-  EXPECT_TRUE((std::is_same<ForRawSignature, ForStdFunction>::value));
-}
-
-struct MockMethodSizes0 {
-  MOCK_METHOD(void, func, ());
-};
-struct MockMethodSizes1 {
-  MOCK_METHOD(void, func, (int));
-};
-struct MockMethodSizes2 {
-  MOCK_METHOD(void, func, (int, int));
-};
-struct MockMethodSizes3 {
-  MOCK_METHOD(void, func, (int, int, int));
-};
-struct MockMethodSizes4 {
-  MOCK_METHOD(void, func, (int, int, int, int));
-};
-
-struct LegacyMockMethodSizes0 {
-    MOCK_METHOD0(func, void());
-};
-struct LegacyMockMethodSizes1 {
-    MOCK_METHOD1(func, void(int));
-};
-struct LegacyMockMethodSizes2 {
-    MOCK_METHOD2(func, void(int, int));
-};
-struct LegacyMockMethodSizes3 {
-    MOCK_METHOD3(func, void(int, int, int));
-};
-struct LegacyMockMethodSizes4 {
-    MOCK_METHOD4(func, void(int, int, int, int));
-};
-
-
-TEST(MockMethodMockFunctionTest, MockMethodSizeOverhead) {
-  EXPECT_EQ(sizeof(MockMethodSizes0), sizeof(MockMethodSizes1));
-  EXPECT_EQ(sizeof(MockMethodSizes0), sizeof(MockMethodSizes2));
-  EXPECT_EQ(sizeof(MockMethodSizes0), sizeof(MockMethodSizes3));
-  EXPECT_EQ(sizeof(MockMethodSizes0), sizeof(MockMethodSizes4));
-
-  EXPECT_EQ(sizeof(LegacyMockMethodSizes0), sizeof(LegacyMockMethodSizes1));
-  EXPECT_EQ(sizeof(LegacyMockMethodSizes0), sizeof(LegacyMockMethodSizes2));
-  EXPECT_EQ(sizeof(LegacyMockMethodSizes0), sizeof(LegacyMockMethodSizes3));
-  EXPECT_EQ(sizeof(LegacyMockMethodSizes0), sizeof(LegacyMockMethodSizes4));
-
-  EXPECT_EQ(sizeof(LegacyMockMethodSizes0), sizeof(MockMethodSizes0));
-}
-
-void hasTwoParams(int, int);
-void MaybeThrows();
-void DoesntThrow() noexcept;
-struct MockMethodNoexceptSpecifier {
-  MOCK_METHOD(void, func1, (), (noexcept));
-  MOCK_METHOD(void, func2, (), (noexcept(true)));
-  MOCK_METHOD(void, func3, (), (noexcept(false)));
-  MOCK_METHOD(void, func4, (), (noexcept(noexcept(MaybeThrows()))));
-  MOCK_METHOD(void, func5, (), (noexcept(noexcept(DoesntThrow()))));
-  MOCK_METHOD(void, func6, (), (noexcept(noexcept(DoesntThrow())), const));
-  MOCK_METHOD(void, func7, (), (const, noexcept(noexcept(DoesntThrow()))));
-  // Put commas in the noexcept expression
-  MOCK_METHOD(void, func8, (), (noexcept(noexcept(hasTwoParams(1, 2))), const));
-};
-
-TEST(MockMethodMockFunctionTest, NoexceptSpecifierPreserved) {
-  EXPECT_TRUE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func1()));
-  EXPECT_TRUE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func2()));
-  EXPECT_FALSE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func3()));
-  EXPECT_FALSE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func4()));
-  EXPECT_TRUE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func5()));
-  EXPECT_TRUE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func6()));
-  EXPECT_TRUE(noexcept(std::declval<MockMethodNoexceptSpecifier>().func7()));
-  EXPECT_EQ(noexcept(std::declval<MockMethodNoexceptSpecifier>().func8()),
-            noexcept(hasTwoParams(1, 2)));
-}
-
-}  // namespace gmock_function_mocker_test
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/test/gmock-internal-utils_test.cc b/third_party/googletest/googlemock/test/gmock-internal-utils_test.cc
deleted file mode 100644
index 0d15e8f..0000000
--- a/third_party/googletest/googlemock/test/gmock-internal-utils_test.cc
+++ /dev/null
@@ -1,720 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the internal utilities.
-
-#include "gmock/internal/gmock-internal-utils.h"
-
-#include <stdlib.h>
-
-#include <cstdint>
-#include <map>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "gmock/gmock.h"
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-
-// Indicates that this translation unit is part of Google Test's
-// implementation.  It must come before gtest-internal-inl.h is
-// included, or there will be a compiler error.  This trick is to
-// prevent a user from accidentally including gtest-internal-inl.h in
-// their code.
-#define GTEST_IMPLEMENTATION_ 1
-#include "src/gtest-internal-inl.h"
-#undef GTEST_IMPLEMENTATION_
-
-#if GTEST_OS_CYGWIN
-# include <sys/types.h>  // For ssize_t. NOLINT
-#endif
-
-namespace proto2 {
-class Message;
-}  // namespace proto2
-
-namespace testing {
-namespace internal {
-
-namespace {
-
-TEST(JoinAsTupleTest, JoinsEmptyTuple) {
-  EXPECT_EQ("", JoinAsTuple(Strings()));
-}
-
-TEST(JoinAsTupleTest, JoinsOneTuple) {
-  const char* fields[] = {"1"};
-  EXPECT_EQ("1", JoinAsTuple(Strings(fields, fields + 1)));
-}
-
-TEST(JoinAsTupleTest, JoinsTwoTuple) {
-  const char* fields[] = {"1", "a"};
-  EXPECT_EQ("(1, a)", JoinAsTuple(Strings(fields, fields + 2)));
-}
-
-TEST(JoinAsTupleTest, JoinsTenTuple) {
-  const char* fields[] = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10"};
-  EXPECT_EQ("(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)",
-            JoinAsTuple(Strings(fields, fields + 10)));
-}
-
-TEST(ConvertIdentifierNameToWordsTest, WorksWhenNameContainsNoWord) {
-  EXPECT_EQ("", ConvertIdentifierNameToWords(""));
-  EXPECT_EQ("", ConvertIdentifierNameToWords("_"));
-  EXPECT_EQ("", ConvertIdentifierNameToWords("__"));
-}
-
-TEST(ConvertIdentifierNameToWordsTest, WorksWhenNameContainsDigits) {
-  EXPECT_EQ("1", ConvertIdentifierNameToWords("_1"));
-  EXPECT_EQ("2", ConvertIdentifierNameToWords("2_"));
-  EXPECT_EQ("34", ConvertIdentifierNameToWords("_34_"));
-  EXPECT_EQ("34 56", ConvertIdentifierNameToWords("_34_56"));
-}
-
-TEST(ConvertIdentifierNameToWordsTest, WorksWhenNameContainsCamelCaseWords) {
-  EXPECT_EQ("a big word", ConvertIdentifierNameToWords("ABigWord"));
-  EXPECT_EQ("foo bar", ConvertIdentifierNameToWords("FooBar"));
-  EXPECT_EQ("foo", ConvertIdentifierNameToWords("Foo_"));
-  EXPECT_EQ("foo bar", ConvertIdentifierNameToWords("_Foo_Bar_"));
-  EXPECT_EQ("foo and bar", ConvertIdentifierNameToWords("_Foo__And_Bar"));
-}
-
-TEST(ConvertIdentifierNameToWordsTest, WorksWhenNameContains_SeparatedWords) {
-  EXPECT_EQ("foo bar", ConvertIdentifierNameToWords("foo_bar"));
-  EXPECT_EQ("foo", ConvertIdentifierNameToWords("_foo_"));
-  EXPECT_EQ("foo bar", ConvertIdentifierNameToWords("_foo_bar_"));
-  EXPECT_EQ("foo and bar", ConvertIdentifierNameToWords("_foo__and_bar"));
-}
-
-TEST(ConvertIdentifierNameToWordsTest, WorksWhenNameIsMixture) {
-  EXPECT_EQ("foo bar 123", ConvertIdentifierNameToWords("Foo_bar123"));
-  EXPECT_EQ("chapter 11 section 1",
-            ConvertIdentifierNameToWords("_Chapter11Section_1_"));
-}
-
-TEST(GetRawPointerTest, WorksForSmartPointers) {
-  const char* const raw_p1 = new const char('a');  // NOLINT
-  const std::unique_ptr<const char> p1(raw_p1);
-  EXPECT_EQ(raw_p1, GetRawPointer(p1));
-  double* const raw_p2 = new double(2.5);  // NOLINT
-  const std::shared_ptr<double> p2(raw_p2);
-  EXPECT_EQ(raw_p2, GetRawPointer(p2));
-}
-
-TEST(GetRawPointerTest, WorksForRawPointers) {
-  int* p = nullptr;
-  EXPECT_TRUE(nullptr == GetRawPointer(p));
-  int n = 1;
-  EXPECT_EQ(&n, GetRawPointer(&n));
-}
-
-// Tests KindOf<T>.
-
-class Base {};
-class Derived : public Base {};
-
-TEST(KindOfTest, Bool) {
-  EXPECT_EQ(kBool, GMOCK_KIND_OF_(bool));  // NOLINT
-}
-
-TEST(KindOfTest, Integer) {
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(char));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(signed char));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(unsigned char));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(short));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(unsigned short));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(int));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(unsigned int));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(long));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(unsigned long));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(long long));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(unsigned long long));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(wchar_t));  // NOLINT
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(size_t));  // NOLINT
-#if GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_CYGWIN
-  // ssize_t is not defined on Windows and possibly some other OSes.
-  EXPECT_EQ(kInteger, GMOCK_KIND_OF_(ssize_t));  // NOLINT
-#endif
-}
-
-TEST(KindOfTest, FloatingPoint) {
-  EXPECT_EQ(kFloatingPoint, GMOCK_KIND_OF_(float));  // NOLINT
-  EXPECT_EQ(kFloatingPoint, GMOCK_KIND_OF_(double));  // NOLINT
-  EXPECT_EQ(kFloatingPoint, GMOCK_KIND_OF_(long double));  // NOLINT
-}
-
-TEST(KindOfTest, Other) {
-  EXPECT_EQ(kOther, GMOCK_KIND_OF_(void*));  // NOLINT
-  EXPECT_EQ(kOther, GMOCK_KIND_OF_(char**));  // NOLINT
-  EXPECT_EQ(kOther, GMOCK_KIND_OF_(Base));  // NOLINT
-}
-
-// Tests LosslessArithmeticConvertible<T, U>.
-
-TEST(LosslessArithmeticConvertibleTest, BoolToBool) {
-  EXPECT_TRUE((LosslessArithmeticConvertible<bool, bool>::value));
-}
-
-TEST(LosslessArithmeticConvertibleTest, BoolToInteger) {
-  EXPECT_TRUE((LosslessArithmeticConvertible<bool, char>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<bool, int>::value));
-  EXPECT_TRUE(
-      (LosslessArithmeticConvertible<bool, unsigned long>::value));  // NOLINT
-}
-
-TEST(LosslessArithmeticConvertibleTest, BoolToFloatingPoint) {
-  EXPECT_TRUE((LosslessArithmeticConvertible<bool, float>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<bool, double>::value));
-}
-
-TEST(LosslessArithmeticConvertibleTest, IntegerToBool) {
-  EXPECT_FALSE((LosslessArithmeticConvertible<unsigned char, bool>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<int, bool>::value));
-}
-
-TEST(LosslessArithmeticConvertibleTest, IntegerToInteger) {
-  // Unsigned => larger signed is fine.
-  EXPECT_TRUE((LosslessArithmeticConvertible<unsigned char, int>::value));
-
-  // Unsigned => larger unsigned is fine.
-  EXPECT_TRUE((LosslessArithmeticConvertible<
-               unsigned short, uint64_t>::value));  // NOLINT
-
-  // Signed => unsigned is not fine.
-  EXPECT_FALSE((LosslessArithmeticConvertible<
-                short, uint64_t>::value));  // NOLINT
-  EXPECT_FALSE((LosslessArithmeticConvertible<
-      signed char, unsigned int>::value));  // NOLINT
-
-  // Same size and same signedness: fine too.
-  EXPECT_TRUE((LosslessArithmeticConvertible<
-               unsigned char, unsigned char>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<int, int>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<wchar_t, wchar_t>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<
-               unsigned long, unsigned long>::value));  // NOLINT
-
-  // Same size, different signedness: not fine.
-  EXPECT_FALSE((LosslessArithmeticConvertible<
-                unsigned char, signed char>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<int, unsigned int>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<uint64_t, int64_t>::value));
-
-  // Larger size => smaller size is not fine.
-  EXPECT_FALSE((LosslessArithmeticConvertible<long, char>::value));  // NOLINT
-  EXPECT_FALSE((LosslessArithmeticConvertible<int, signed char>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<int64_t, unsigned int>::value));
-}
-
-TEST(LosslessArithmeticConvertibleTest, IntegerToFloatingPoint) {
-  // Integers cannot be losslessly converted to floating-points, as
-  // the format of the latter is implementation-defined.
-  EXPECT_FALSE((LosslessArithmeticConvertible<char, float>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<int, double>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<
-                short, long double>::value));  // NOLINT
-}
-
-TEST(LosslessArithmeticConvertibleTest, FloatingPointToBool) {
-  EXPECT_FALSE((LosslessArithmeticConvertible<float, bool>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<double, bool>::value));
-}
-
-TEST(LosslessArithmeticConvertibleTest, FloatingPointToInteger) {
-  EXPECT_FALSE((LosslessArithmeticConvertible<float, long>::value));  // NOLINT
-  EXPECT_FALSE((LosslessArithmeticConvertible<double, int64_t>::value));
-  EXPECT_FALSE((LosslessArithmeticConvertible<long double, int>::value));
-}
-
-TEST(LosslessArithmeticConvertibleTest, FloatingPointToFloatingPoint) {
-  // Smaller size => larger size is fine.
-  EXPECT_TRUE((LosslessArithmeticConvertible<float, double>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<float, long double>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<double, long double>::value));
-
-  // Same size: fine.
-  EXPECT_TRUE((LosslessArithmeticConvertible<float, float>::value));
-  EXPECT_TRUE((LosslessArithmeticConvertible<double, double>::value));
-
-  // Larger size => smaller size is not fine.
-  EXPECT_FALSE((LosslessArithmeticConvertible<double, float>::value));
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (sizeof(double) == sizeof(long double)) {  // NOLINT
-  GTEST_INTENTIONAL_CONST_COND_POP_()
-    // In some implementations (e.g. MSVC), double and long double
-    // have the same size.
-    EXPECT_TRUE((LosslessArithmeticConvertible<long double, double>::value));
-  } else {
-    EXPECT_FALSE((LosslessArithmeticConvertible<long double, double>::value));
-  }
-}
-
-// Tests the TupleMatches() template function.
-
-TEST(TupleMatchesTest, WorksForSize0) {
-  std::tuple<> matchers;
-  std::tuple<> values;
-
-  EXPECT_TRUE(TupleMatches(matchers, values));
-}
-
-TEST(TupleMatchesTest, WorksForSize1) {
-  std::tuple<Matcher<int> > matchers(Eq(1));
-  std::tuple<int> values1(1), values2(2);
-
-  EXPECT_TRUE(TupleMatches(matchers, values1));
-  EXPECT_FALSE(TupleMatches(matchers, values2));
-}
-
-TEST(TupleMatchesTest, WorksForSize2) {
-  std::tuple<Matcher<int>, Matcher<char> > matchers(Eq(1), Eq('a'));
-  std::tuple<int, char> values1(1, 'a'), values2(1, 'b'), values3(2, 'a'),
-      values4(2, 'b');
-
-  EXPECT_TRUE(TupleMatches(matchers, values1));
-  EXPECT_FALSE(TupleMatches(matchers, values2));
-  EXPECT_FALSE(TupleMatches(matchers, values3));
-  EXPECT_FALSE(TupleMatches(matchers, values4));
-}
-
-TEST(TupleMatchesTest, WorksForSize5) {
-  std::tuple<Matcher<int>, Matcher<char>, Matcher<bool>,
-             Matcher<long>,  // NOLINT
-             Matcher<std::string> >
-      matchers(Eq(1), Eq('a'), Eq(true), Eq(2L), Eq("hi"));
-  std::tuple<int, char, bool, long, std::string>  // NOLINT
-      values1(1, 'a', true, 2L, "hi"), values2(1, 'a', true, 2L, "hello"),
-      values3(2, 'a', true, 2L, "hi");
-
-  EXPECT_TRUE(TupleMatches(matchers, values1));
-  EXPECT_FALSE(TupleMatches(matchers, values2));
-  EXPECT_FALSE(TupleMatches(matchers, values3));
-}
-
-// Tests that Assert(true, ...) succeeds.
-TEST(AssertTest, SucceedsOnTrue) {
-  Assert(true, __FILE__, __LINE__, "This should succeed.");
-  Assert(true, __FILE__, __LINE__);  // This should succeed too.
-}
-
-// Tests that Assert(false, ...) generates a fatal failure.
-TEST(AssertTest, FailsFatallyOnFalse) {
-  EXPECT_DEATH_IF_SUPPORTED({
-    Assert(false, __FILE__, __LINE__, "This should fail.");
-  }, "");
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    Assert(false, __FILE__, __LINE__);
-  }, "");
-}
-
-// Tests that Expect(true, ...) succeeds.
-TEST(ExpectTest, SucceedsOnTrue) {
-  Expect(true, __FILE__, __LINE__, "This should succeed.");
-  Expect(true, __FILE__, __LINE__);  // This should succeed too.
-}
-
-// Tests that Expect(false, ...) generates a non-fatal failure.
-TEST(ExpectTest, FailsNonfatallyOnFalse) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    Expect(false, __FILE__, __LINE__, "This should fail.");
-  }, "This should fail");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    Expect(false, __FILE__, __LINE__);
-  }, "Expectation failed");
-}
-
-// Tests LogIsVisible().
-
-class LogIsVisibleTest : public ::testing::Test {
- protected:
-  void SetUp() override { original_verbose_ = GMOCK_FLAG(verbose); }
-
-  void TearDown() override { GMOCK_FLAG(verbose) = original_verbose_; }
-
-  std::string original_verbose_;
-};
-
-TEST_F(LogIsVisibleTest, AlwaysReturnsTrueIfVerbosityIsInfo) {
-  GMOCK_FLAG(verbose) = kInfoVerbosity;
-  EXPECT_TRUE(LogIsVisible(kInfo));
-  EXPECT_TRUE(LogIsVisible(kWarning));
-}
-
-TEST_F(LogIsVisibleTest, AlwaysReturnsFalseIfVerbosityIsError) {
-  GMOCK_FLAG(verbose) = kErrorVerbosity;
-  EXPECT_FALSE(LogIsVisible(kInfo));
-  EXPECT_FALSE(LogIsVisible(kWarning));
-}
-
-TEST_F(LogIsVisibleTest, WorksWhenVerbosityIsWarning) {
-  GMOCK_FLAG(verbose) = kWarningVerbosity;
-  EXPECT_FALSE(LogIsVisible(kInfo));
-  EXPECT_TRUE(LogIsVisible(kWarning));
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Tests the Log() function.
-
-// Verifies that Log() behaves correctly for the given verbosity level
-// and log severity.
-void TestLogWithSeverity(const std::string& verbosity, LogSeverity severity,
-                         bool should_print) {
-  const std::string old_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = verbosity;
-  CaptureStdout();
-  Log(severity, "Test log.\n", 0);
-  if (should_print) {
-    EXPECT_THAT(GetCapturedStdout().c_str(),
-                ContainsRegex(
-                    severity == kWarning ?
-                    "^\nGMOCK WARNING:\nTest log\\.\nStack trace:\n" :
-                    "^\nTest log\\.\nStack trace:\n"));
-  } else {
-    EXPECT_STREQ("", GetCapturedStdout().c_str());
-  }
-  GMOCK_FLAG(verbose) = old_flag;
-}
-
-// Tests that when the stack_frames_to_skip parameter is negative,
-// Log() doesn't include the stack trace in the output.
-TEST(LogTest, NoStackTraceWhenStackFramesToSkipIsNegative) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = kInfoVerbosity;
-  CaptureStdout();
-  Log(kInfo, "Test log.\n", -1);
-  EXPECT_STREQ("\nTest log.\n", GetCapturedStdout().c_str());
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-struct MockStackTraceGetter : testing::internal::OsStackTraceGetterInterface {
-  std::string CurrentStackTrace(int max_depth, int skip_count) override {
-    return (testing::Message() << max_depth << "::" << skip_count << "\n")
-        .GetString();
-  }
-  void UponLeavingGTest() override {}
-};
-
-// Tests that in opt mode, a positive stack_frames_to_skip argument is
-// treated as 0.
-TEST(LogTest, NoSkippingStackFrameInOptMode) {
-  MockStackTraceGetter* mock_os_stack_trace_getter = new MockStackTraceGetter;
-  GetUnitTestImpl()->set_os_stack_trace_getter(mock_os_stack_trace_getter);
-
-  CaptureStdout();
-  Log(kWarning, "Test log.\n", 100);
-  const std::string log = GetCapturedStdout();
-
-  std::string expected_trace =
-      (testing::Message() << GTEST_FLAG(stack_trace_depth) << "::").GetString();
-  std::string expected_message =
-      "\nGMOCK WARNING:\n"
-      "Test log.\n"
-      "Stack trace:\n" +
-      expected_trace;
-  EXPECT_THAT(log, HasSubstr(expected_message));
-  int skip_count = atoi(log.substr(expected_message.size()).c_str());
-
-# if defined(NDEBUG)
-  // In opt mode, no stack frame should be skipped.
-  const int expected_skip_count = 0;
-# else
-  // In dbg mode, the stack frames should be skipped.
-  const int expected_skip_count = 100;
-# endif
-
-  // Note that each inner implementation layer will +1 the number to remove
-  // itself from the trace. This means that the value is a little higher than
-  // expected, but close enough.
-  EXPECT_THAT(skip_count,
-              AllOf(Ge(expected_skip_count), Le(expected_skip_count + 10)));
-
-  // Restores the default OS stack trace getter.
-  GetUnitTestImpl()->set_os_stack_trace_getter(nullptr);
-}
-
-// Tests that all logs are printed when the value of the
-// --gmock_verbose flag is "info".
-TEST(LogTest, AllLogsArePrintedWhenVerbosityIsInfo) {
-  TestLogWithSeverity(kInfoVerbosity, kInfo, true);
-  TestLogWithSeverity(kInfoVerbosity, kWarning, true);
-}
-
-// Tests that only warnings are printed when the value of the
-// --gmock_verbose flag is "warning".
-TEST(LogTest, OnlyWarningsArePrintedWhenVerbosityIsWarning) {
-  TestLogWithSeverity(kWarningVerbosity, kInfo, false);
-  TestLogWithSeverity(kWarningVerbosity, kWarning, true);
-}
-
-// Tests that no logs are printed when the value of the
-// --gmock_verbose flag is "error".
-TEST(LogTest, NoLogsArePrintedWhenVerbosityIsError) {
-  TestLogWithSeverity(kErrorVerbosity, kInfo, false);
-  TestLogWithSeverity(kErrorVerbosity, kWarning, false);
-}
-
-// Tests that only warnings are printed when the value of the
-// --gmock_verbose flag is invalid.
-TEST(LogTest, OnlyWarningsArePrintedWhenVerbosityIsInvalid) {
-  TestLogWithSeverity("invalid", kInfo, false);
-  TestLogWithSeverity("invalid", kWarning, true);
-}
-
-// Verifies that Log() behaves correctly for the given verbosity level
-// and log severity.
-std::string GrabOutput(void(*logger)(), const char* verbosity) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = verbosity;
-  CaptureStdout();
-  logger();
-  GMOCK_FLAG(verbose) = saved_flag;
-  return GetCapturedStdout();
-}
-
-class DummyMock {
- public:
-  MOCK_METHOD0(TestMethod, void());
-  MOCK_METHOD1(TestMethodArg, void(int dummy));
-};
-
-void ExpectCallLogger() {
-  DummyMock mock;
-  EXPECT_CALL(mock, TestMethod());
-  mock.TestMethod();
-}
-
-// Verifies that EXPECT_CALL logs if the --gmock_verbose flag is set to "info".
-TEST(ExpectCallTest, LogsWhenVerbosityIsInfo) {
-  EXPECT_THAT(std::string(GrabOutput(ExpectCallLogger, kInfoVerbosity)),
-              HasSubstr("EXPECT_CALL(mock, TestMethod())"));
-}
-
-// Verifies that EXPECT_CALL doesn't log
-// if the --gmock_verbose flag is set to "warning".
-TEST(ExpectCallTest, DoesNotLogWhenVerbosityIsWarning) {
-  EXPECT_STREQ("", GrabOutput(ExpectCallLogger, kWarningVerbosity).c_str());
-}
-
-// Verifies that EXPECT_CALL doesn't log
-// if the --gmock_verbose flag is set to "error".
-TEST(ExpectCallTest,  DoesNotLogWhenVerbosityIsError) {
-  EXPECT_STREQ("", GrabOutput(ExpectCallLogger, kErrorVerbosity).c_str());
-}
-
-void OnCallLogger() {
-  DummyMock mock;
-  ON_CALL(mock, TestMethod());
-}
-
-// Verifies that ON_CALL logs if the --gmock_verbose flag is set to "info".
-TEST(OnCallTest, LogsWhenVerbosityIsInfo) {
-  EXPECT_THAT(std::string(GrabOutput(OnCallLogger, kInfoVerbosity)),
-              HasSubstr("ON_CALL(mock, TestMethod())"));
-}
-
-// Verifies that ON_CALL doesn't log
-// if the --gmock_verbose flag is set to "warning".
-TEST(OnCallTest, DoesNotLogWhenVerbosityIsWarning) {
-  EXPECT_STREQ("", GrabOutput(OnCallLogger, kWarningVerbosity).c_str());
-}
-
-// Verifies that ON_CALL doesn't log if
-// the --gmock_verbose flag is set to "error".
-TEST(OnCallTest, DoesNotLogWhenVerbosityIsError) {
-  EXPECT_STREQ("", GrabOutput(OnCallLogger, kErrorVerbosity).c_str());
-}
-
-void OnCallAnyArgumentLogger() {
-  DummyMock mock;
-  ON_CALL(mock, TestMethodArg(_));
-}
-
-// Verifies that ON_CALL prints provided _ argument.
-TEST(OnCallTest, LogsAnythingArgument) {
-  EXPECT_THAT(std::string(GrabOutput(OnCallAnyArgumentLogger, kInfoVerbosity)),
-              HasSubstr("ON_CALL(mock, TestMethodArg(_)"));
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Tests StlContainerView.
-
-TEST(StlContainerViewTest, WorksForStlContainer) {
-  StaticAssertTypeEq<std::vector<int>,
-      StlContainerView<std::vector<int> >::type>();
-  StaticAssertTypeEq<const std::vector<double>&,
-      StlContainerView<std::vector<double> >::const_reference>();
-
-  typedef std::vector<char> Chars;
-  Chars v1;
-  const Chars& v2(StlContainerView<Chars>::ConstReference(v1));
-  EXPECT_EQ(&v1, &v2);
-
-  v1.push_back('a');
-  Chars v3 = StlContainerView<Chars>::Copy(v1);
-  EXPECT_THAT(v3, Eq(v3));
-}
-
-TEST(StlContainerViewTest, WorksForStaticNativeArray) {
-  StaticAssertTypeEq<NativeArray<int>,
-      StlContainerView<int[3]>::type>();
-  StaticAssertTypeEq<NativeArray<double>,
-      StlContainerView<const double[4]>::type>();
-  StaticAssertTypeEq<NativeArray<char[3]>,
-      StlContainerView<const char[2][3]>::type>();
-
-  StaticAssertTypeEq<const NativeArray<int>,
-      StlContainerView<int[2]>::const_reference>();
-
-  int a1[3] = { 0, 1, 2 };
-  NativeArray<int> a2 = StlContainerView<int[3]>::ConstReference(a1);
-  EXPECT_EQ(3U, a2.size());
-  EXPECT_EQ(a1, a2.begin());
-
-  const NativeArray<int> a3 = StlContainerView<int[3]>::Copy(a1);
-  ASSERT_EQ(3U, a3.size());
-  EXPECT_EQ(0, a3.begin()[0]);
-  EXPECT_EQ(1, a3.begin()[1]);
-  EXPECT_EQ(2, a3.begin()[2]);
-
-  // Makes sure a1 and a3 aren't aliases.
-  a1[0] = 3;
-  EXPECT_EQ(0, a3.begin()[0]);
-}
-
-TEST(StlContainerViewTest, WorksForDynamicNativeArray) {
-  StaticAssertTypeEq<NativeArray<int>,
-                     StlContainerView<std::tuple<const int*, size_t> >::type>();
-  StaticAssertTypeEq<
-      NativeArray<double>,
-      StlContainerView<std::tuple<std::shared_ptr<double>, int> >::type>();
-
-  StaticAssertTypeEq<
-      const NativeArray<int>,
-      StlContainerView<std::tuple<const int*, int> >::const_reference>();
-
-  int a1[3] = { 0, 1, 2 };
-  const int* const p1 = a1;
-  NativeArray<int> a2 =
-      StlContainerView<std::tuple<const int*, int> >::ConstReference(
-          std::make_tuple(p1, 3));
-  EXPECT_EQ(3U, a2.size());
-  EXPECT_EQ(a1, a2.begin());
-
-  const NativeArray<int> a3 = StlContainerView<std::tuple<int*, size_t> >::Copy(
-      std::make_tuple(static_cast<int*>(a1), 3));
-  ASSERT_EQ(3U, a3.size());
-  EXPECT_EQ(0, a3.begin()[0]);
-  EXPECT_EQ(1, a3.begin()[1]);
-  EXPECT_EQ(2, a3.begin()[2]);
-
-  // Makes sure a1 and a3 aren't aliases.
-  a1[0] = 3;
-  EXPECT_EQ(0, a3.begin()[0]);
-}
-
-// Tests the Function template struct.
-
-TEST(FunctionTest, Nullary) {
-  typedef Function<int()> F;  // NOLINT
-  EXPECT_EQ(0u, F::ArgumentCount);
-  EXPECT_TRUE((std::is_same<int, F::Result>::value));
-  EXPECT_TRUE((std::is_same<std::tuple<>, F::ArgumentTuple>::value));
-  EXPECT_TRUE((std::is_same<std::tuple<>, F::ArgumentMatcherTuple>::value));
-  EXPECT_TRUE((std::is_same<void(), F::MakeResultVoid>::value));
-  EXPECT_TRUE((std::is_same<IgnoredValue(), F::MakeResultIgnoredValue>::value));
-}
-
-TEST(FunctionTest, Unary) {
-  typedef Function<int(bool)> F;  // NOLINT
-  EXPECT_EQ(1u, F::ArgumentCount);
-  EXPECT_TRUE((std::is_same<int, F::Result>::value));
-  EXPECT_TRUE((std::is_same<bool, F::Arg<0>::type>::value));
-  EXPECT_TRUE((std::is_same<std::tuple<bool>, F::ArgumentTuple>::value));
-  EXPECT_TRUE((
-      std::is_same<std::tuple<Matcher<bool>>, F::ArgumentMatcherTuple>::value));
-  EXPECT_TRUE((std::is_same<void(bool), F::MakeResultVoid>::value));  // NOLINT
-  EXPECT_TRUE((std::is_same<IgnoredValue(bool),                       // NOLINT
-                            F::MakeResultIgnoredValue>::value));
-}
-
-TEST(FunctionTest, Binary) {
-  typedef Function<int(bool, const long&)> F;  // NOLINT
-  EXPECT_EQ(2u, F::ArgumentCount);
-  EXPECT_TRUE((std::is_same<int, F::Result>::value));
-  EXPECT_TRUE((std::is_same<bool, F::Arg<0>::type>::value));
-  EXPECT_TRUE((std::is_same<const long&, F::Arg<1>::type>::value));  // NOLINT
-  EXPECT_TRUE((std::is_same<std::tuple<bool, const long&>,           // NOLINT
-                            F::ArgumentTuple>::value));
-  EXPECT_TRUE(
-      (std::is_same<std::tuple<Matcher<bool>, Matcher<const long&>>,  // NOLINT
-                    F::ArgumentMatcherTuple>::value));
-  EXPECT_TRUE((std::is_same<void(bool, const long&),  // NOLINT
-                            F::MakeResultVoid>::value));
-  EXPECT_TRUE((std::is_same<IgnoredValue(bool, const long&),  // NOLINT
-                            F::MakeResultIgnoredValue>::value));
-}
-
-TEST(FunctionTest, LongArgumentList) {
-  typedef Function<char(bool, int, char*, int&, const long&)> F;  // NOLINT
-  EXPECT_EQ(5u, F::ArgumentCount);
-  EXPECT_TRUE((std::is_same<char, F::Result>::value));
-  EXPECT_TRUE((std::is_same<bool, F::Arg<0>::type>::value));
-  EXPECT_TRUE((std::is_same<int, F::Arg<1>::type>::value));
-  EXPECT_TRUE((std::is_same<char*, F::Arg<2>::type>::value));
-  EXPECT_TRUE((std::is_same<int&, F::Arg<3>::type>::value));
-  EXPECT_TRUE((std::is_same<const long&, F::Arg<4>::type>::value));  // NOLINT
-  EXPECT_TRUE(
-      (std::is_same<std::tuple<bool, int, char*, int&, const long&>,  // NOLINT
-                    F::ArgumentTuple>::value));
-  EXPECT_TRUE(
-      (std::is_same<
-          std::tuple<Matcher<bool>, Matcher<int>, Matcher<char*>, Matcher<int&>,
-                     Matcher<const long&>>,  // NOLINT
-          F::ArgumentMatcherTuple>::value));
-  EXPECT_TRUE(
-      (std::is_same<void(bool, int, char*, int&, const long&),  // NOLINT
-                    F::MakeResultVoid>::value));
-  EXPECT_TRUE((
-      std::is_same<IgnoredValue(bool, int, char*, int&, const long&),  // NOLINT
-                   F::MakeResultIgnoredValue>::value));
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/test/gmock-matchers_test.cc b/third_party/googletest/googlemock/test/gmock-matchers_test.cc
deleted file mode 100644
index 1f48a76..0000000
--- a/third_party/googletest/googlemock/test/gmock-matchers_test.cc
+++ /dev/null
@@ -1,8562 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests some commonly used argument matchers.
-
-// Silence warning C4244: 'initializing': conversion from 'int' to 'short',
-// possible loss of data and C4100, unreferenced local parameter
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4244)
-# pragma warning(disable:4100)
-#endif
-
-#include "gmock/gmock-matchers.h"
-
-#include <string.h>
-#include <time.h>
-
-#include <array>
-#include <cstdint>
-#include <deque>
-#include <forward_list>
-#include <functional>
-#include <iostream>
-#include <iterator>
-#include <limits>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <sstream>
-#include <string>
-#include <type_traits>
-#include <unordered_map>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "gmock/gmock-more-matchers.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace gmock_matchers_test {
-namespace {
-
-using std::greater;
-using std::less;
-using std::list;
-using std::make_pair;
-using std::map;
-using std::multimap;
-using std::multiset;
-using std::ostream;
-using std::pair;
-using std::set;
-using std::stringstream;
-using std::vector;
-using testing::internal::DummyMatchResultListener;
-using testing::internal::ElementMatcherPair;
-using testing::internal::ElementMatcherPairs;
-using testing::internal::ElementsAreArrayMatcher;
-using testing::internal::ExplainMatchFailureTupleTo;
-using testing::internal::FloatingEqMatcher;
-using testing::internal::FormatMatcherDescription;
-using testing::internal::IsReadableTypeName;
-using testing::internal::MatchMatrix;
-using testing::internal::PredicateFormatterFromMatcher;
-using testing::internal::RE;
-using testing::internal::StreamMatchResultListener;
-using testing::internal::Strings;
-
-// Helper for testing container-valued matchers in mock method context. It is
-// important to test matchers in this context, since it requires additional type
-// deduction beyond what EXPECT_THAT does, thus making it more restrictive.
-struct ContainerHelper {
-  MOCK_METHOD1(Call, void(std::vector<std::unique_ptr<int>>));
-};
-
-std::vector<std::unique_ptr<int>> MakeUniquePtrs(const std::vector<int>& ints) {
-  std::vector<std::unique_ptr<int>> pointers;
-  for (int i : ints) pointers.emplace_back(new int(i));
-  return pointers;
-}
-
-// For testing ExplainMatchResultTo().
-class GreaterThanMatcher : public MatcherInterface<int> {
- public:
-  explicit GreaterThanMatcher(int rhs) : rhs_(rhs) {}
-
-  void DescribeTo(ostream* os) const override { *os << "is > " << rhs_; }
-
-  bool MatchAndExplain(int lhs, MatchResultListener* listener) const override {
-    const int diff = lhs - rhs_;
-    if (diff > 0) {
-      *listener << "which is " << diff << " more than " << rhs_;
-    } else if (diff == 0) {
-      *listener << "which is the same as " << rhs_;
-    } else {
-      *listener << "which is " << -diff << " less than " << rhs_;
-    }
-
-    return lhs > rhs_;
-  }
-
- private:
-  int rhs_;
-};
-
-Matcher<int> GreaterThan(int n) {
-  return MakeMatcher(new GreaterThanMatcher(n));
-}
-
-std::string OfType(const std::string& type_name) {
-#if GTEST_HAS_RTTI
-  return IsReadableTypeName(type_name) ? " (of type " + type_name + ")" : "";
-#else
-  return "";
-#endif
-}
-
-// Returns the description of the given matcher.
-template <typename T>
-std::string Describe(const Matcher<T>& m) {
-  return DescribeMatcher<T>(m);
-}
-
-// Returns the description of the negation of the given matcher.
-template <typename T>
-std::string DescribeNegation(const Matcher<T>& m) {
-  return DescribeMatcher<T>(m, true);
-}
-
-// Returns the reason why x matches, or doesn't match, m.
-template <typename MatcherType, typename Value>
-std::string Explain(const MatcherType& m, const Value& x) {
-  StringMatchResultListener listener;
-  ExplainMatchResult(m, x, &listener);
-  return listener.str();
-}
-
-TEST(MonotonicMatcherTest, IsPrintable) {
-  stringstream ss;
-  ss << GreaterThan(5);
-  EXPECT_EQ("is > 5", ss.str());
-}
-
-TEST(MatchResultListenerTest, StreamingWorks) {
-  StringMatchResultListener listener;
-  listener << "hi" << 5;
-  EXPECT_EQ("hi5", listener.str());
-
-  listener.Clear();
-  EXPECT_EQ("", listener.str());
-
-  listener << 42;
-  EXPECT_EQ("42", listener.str());
-
-  // Streaming shouldn't crash when the underlying ostream is NULL.
-  DummyMatchResultListener dummy;
-  dummy << "hi" << 5;
-}
-
-TEST(MatchResultListenerTest, CanAccessUnderlyingStream) {
-  EXPECT_TRUE(DummyMatchResultListener().stream() == nullptr);
-  EXPECT_TRUE(StreamMatchResultListener(nullptr).stream() == nullptr);
-
-  EXPECT_EQ(&std::cout, StreamMatchResultListener(&std::cout).stream());
-}
-
-TEST(MatchResultListenerTest, IsInterestedWorks) {
-  EXPECT_TRUE(StringMatchResultListener().IsInterested());
-  EXPECT_TRUE(StreamMatchResultListener(&std::cout).IsInterested());
-
-  EXPECT_FALSE(DummyMatchResultListener().IsInterested());
-  EXPECT_FALSE(StreamMatchResultListener(nullptr).IsInterested());
-}
-
-// Makes sure that the MatcherInterface<T> interface doesn't
-// change.
-class EvenMatcherImpl : public MatcherInterface<int> {
- public:
-  bool MatchAndExplain(int x,
-                       MatchResultListener* /* listener */) const override {
-    return x % 2 == 0;
-  }
-
-  void DescribeTo(ostream* os) const override { *os << "is an even number"; }
-
-  // We deliberately don't define DescribeNegationTo() and
-  // ExplainMatchResultTo() here, to make sure the definition of these
-  // two methods is optional.
-};
-
-// Makes sure that the MatcherInterface API doesn't change.
-TEST(MatcherInterfaceTest, CanBeImplementedUsingPublishedAPI) {
-  EvenMatcherImpl m;
-}
-
-// Tests implementing a monomorphic matcher using MatchAndExplain().
-
-class NewEvenMatcherImpl : public MatcherInterface<int> {
- public:
-  bool MatchAndExplain(int x, MatchResultListener* listener) const override {
-    const bool match = x % 2 == 0;
-    // Verifies that we can stream to a listener directly.
-    *listener << "value % " << 2;
-    if (listener->stream() != nullptr) {
-      // Verifies that we can stream to a listener's underlying stream
-      // too.
-      *listener->stream() << " == " << (x % 2);
-    }
-    return match;
-  }
-
-  void DescribeTo(ostream* os) const override { *os << "is an even number"; }
-};
-
-TEST(MatcherInterfaceTest, CanBeImplementedUsingNewAPI) {
-  Matcher<int> m = MakeMatcher(new NewEvenMatcherImpl);
-  EXPECT_TRUE(m.Matches(2));
-  EXPECT_FALSE(m.Matches(3));
-  EXPECT_EQ("value % 2 == 0", Explain(m, 2));
-  EXPECT_EQ("value % 2 == 1", Explain(m, 3));
-}
-
-// Tests default-constructing a matcher.
-TEST(MatcherTest, CanBeDefaultConstructed) {
-  Matcher<double> m;
-}
-
-// Tests that Matcher<T> can be constructed from a MatcherInterface<T>*.
-TEST(MatcherTest, CanBeConstructedFromMatcherInterface) {
-  const MatcherInterface<int>* impl = new EvenMatcherImpl;
-  Matcher<int> m(impl);
-  EXPECT_TRUE(m.Matches(4));
-  EXPECT_FALSE(m.Matches(5));
-}
-
-// Tests that value can be used in place of Eq(value).
-TEST(MatcherTest, CanBeImplicitlyConstructedFromValue) {
-  Matcher<int> m1 = 5;
-  EXPECT_TRUE(m1.Matches(5));
-  EXPECT_FALSE(m1.Matches(6));
-}
-
-// Tests that NULL can be used in place of Eq(NULL).
-TEST(MatcherTest, CanBeImplicitlyConstructedFromNULL) {
-  Matcher<int*> m1 = nullptr;
-  EXPECT_TRUE(m1.Matches(nullptr));
-  int n = 0;
-  EXPECT_FALSE(m1.Matches(&n));
-}
-
-// Tests that matchers can be constructed from a variable that is not properly
-// defined. This should be illegal, but many users rely on this accidentally.
-struct Undefined {
-  virtual ~Undefined() = 0;
-  static const int kInt = 1;
-};
-
-TEST(MatcherTest, CanBeConstructedFromUndefinedVariable) {
-  Matcher<int> m1 = Undefined::kInt;
-  EXPECT_TRUE(m1.Matches(1));
-  EXPECT_FALSE(m1.Matches(2));
-}
-
-// Test that a matcher parameterized with an abstract class compiles.
-TEST(MatcherTest, CanAcceptAbstractClass) { Matcher<const Undefined&> m = _; }
-
-// Tests that matchers are copyable.
-TEST(MatcherTest, IsCopyable) {
-  // Tests the copy constructor.
-  Matcher<bool> m1 = Eq(false);
-  EXPECT_TRUE(m1.Matches(false));
-  EXPECT_FALSE(m1.Matches(true));
-
-  // Tests the assignment operator.
-  m1 = Eq(true);
-  EXPECT_TRUE(m1.Matches(true));
-  EXPECT_FALSE(m1.Matches(false));
-}
-
-// Tests that Matcher<T>::DescribeTo() calls
-// MatcherInterface<T>::DescribeTo().
-TEST(MatcherTest, CanDescribeItself) {
-  EXPECT_EQ("is an even number",
-            Describe(Matcher<int>(new EvenMatcherImpl)));
-}
-
-// Tests Matcher<T>::MatchAndExplain().
-TEST(MatcherTest, MatchAndExplain) {
-  Matcher<int> m = GreaterThan(0);
-  StringMatchResultListener listener1;
-  EXPECT_TRUE(m.MatchAndExplain(42, &listener1));
-  EXPECT_EQ("which is 42 more than 0", listener1.str());
-
-  StringMatchResultListener listener2;
-  EXPECT_FALSE(m.MatchAndExplain(-9, &listener2));
-  EXPECT_EQ("which is 9 less than 0", listener2.str());
-}
-
-// Tests that a C-string literal can be implicitly converted to a
-// Matcher<std::string> or Matcher<const std::string&>.
-TEST(StringMatcherTest, CanBeImplicitlyConstructedFromCStringLiteral) {
-  Matcher<std::string> m1 = "hi";
-  EXPECT_TRUE(m1.Matches("hi"));
-  EXPECT_FALSE(m1.Matches("hello"));
-
-  Matcher<const std::string&> m2 = "hi";
-  EXPECT_TRUE(m2.Matches("hi"));
-  EXPECT_FALSE(m2.Matches("hello"));
-}
-
-// Tests that a string object can be implicitly converted to a
-// Matcher<std::string> or Matcher<const std::string&>.
-TEST(StringMatcherTest, CanBeImplicitlyConstructedFromString) {
-  Matcher<std::string> m1 = std::string("hi");
-  EXPECT_TRUE(m1.Matches("hi"));
-  EXPECT_FALSE(m1.Matches("hello"));
-
-  Matcher<const std::string&> m2 = std::string("hi");
-  EXPECT_TRUE(m2.Matches("hi"));
-  EXPECT_FALSE(m2.Matches("hello"));
-}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// Tests that a C-string literal can be implicitly converted to a
-// Matcher<StringView> or Matcher<const StringView&>.
-TEST(StringViewMatcherTest, CanBeImplicitlyConstructedFromCStringLiteral) {
-  Matcher<internal::StringView> m1 = "cats";
-  EXPECT_TRUE(m1.Matches("cats"));
-  EXPECT_FALSE(m1.Matches("dogs"));
-
-  Matcher<const internal::StringView&> m2 = "cats";
-  EXPECT_TRUE(m2.Matches("cats"));
-  EXPECT_FALSE(m2.Matches("dogs"));
-}
-
-// Tests that a std::string object can be implicitly converted to a
-// Matcher<StringView> or Matcher<const StringView&>.
-TEST(StringViewMatcherTest, CanBeImplicitlyConstructedFromString) {
-  Matcher<internal::StringView> m1 = std::string("cats");
-  EXPECT_TRUE(m1.Matches("cats"));
-  EXPECT_FALSE(m1.Matches("dogs"));
-
-  Matcher<const internal::StringView&> m2 = std::string("cats");
-  EXPECT_TRUE(m2.Matches("cats"));
-  EXPECT_FALSE(m2.Matches("dogs"));
-}
-
-// Tests that a StringView object can be implicitly converted to a
-// Matcher<StringView> or Matcher<const StringView&>.
-TEST(StringViewMatcherTest, CanBeImplicitlyConstructedFromStringView) {
-  Matcher<internal::StringView> m1 = internal::StringView("cats");
-  EXPECT_TRUE(m1.Matches("cats"));
-  EXPECT_FALSE(m1.Matches("dogs"));
-
-  Matcher<const internal::StringView&> m2 = internal::StringView("cats");
-  EXPECT_TRUE(m2.Matches("cats"));
-  EXPECT_FALSE(m2.Matches("dogs"));
-}
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-// Tests that a std::reference_wrapper<std::string> object can be implicitly
-// converted to a Matcher<std::string> or Matcher<const std::string&> via Eq().
-TEST(StringMatcherTest,
-     CanBeImplicitlyConstructedFromEqReferenceWrapperString) {
-  std::string value = "cats";
-  Matcher<std::string> m1 = Eq(std::ref(value));
-  EXPECT_TRUE(m1.Matches("cats"));
-  EXPECT_FALSE(m1.Matches("dogs"));
-
-  Matcher<const std::string&> m2 = Eq(std::ref(value));
-  EXPECT_TRUE(m2.Matches("cats"));
-  EXPECT_FALSE(m2.Matches("dogs"));
-}
-
-// Tests that MakeMatcher() constructs a Matcher<T> from a
-// MatcherInterface* without requiring the user to explicitly
-// write the type.
-TEST(MakeMatcherTest, ConstructsMatcherFromMatcherInterface) {
-  const MatcherInterface<int>* dummy_impl = new EvenMatcherImpl;
-  Matcher<int> m = MakeMatcher(dummy_impl);
-}
-
-// Tests that MakePolymorphicMatcher() can construct a polymorphic
-// matcher from its implementation using the old API.
-const int g_bar = 1;
-class ReferencesBarOrIsZeroImpl {
- public:
-  template <typename T>
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* /* listener */) const {
-    const void* p = &x;
-    return p == &g_bar || x == 0;
-  }
-
-  void DescribeTo(ostream* os) const { *os << "g_bar or zero"; }
-
-  void DescribeNegationTo(ostream* os) const {
-    *os << "doesn't reference g_bar and is not zero";
-  }
-};
-
-// This function verifies that MakePolymorphicMatcher() returns a
-// PolymorphicMatcher<T> where T is the argument's type.
-PolymorphicMatcher<ReferencesBarOrIsZeroImpl> ReferencesBarOrIsZero() {
-  return MakePolymorphicMatcher(ReferencesBarOrIsZeroImpl());
-}
-
-TEST(MakePolymorphicMatcherTest, ConstructsMatcherUsingOldAPI) {
-  // Using a polymorphic matcher to match a reference type.
-  Matcher<const int&> m1 = ReferencesBarOrIsZero();
-  EXPECT_TRUE(m1.Matches(0));
-  // Verifies that the identity of a by-reference argument is preserved.
-  EXPECT_TRUE(m1.Matches(g_bar));
-  EXPECT_FALSE(m1.Matches(1));
-  EXPECT_EQ("g_bar or zero", Describe(m1));
-
-  // Using a polymorphic matcher to match a value type.
-  Matcher<double> m2 = ReferencesBarOrIsZero();
-  EXPECT_TRUE(m2.Matches(0.0));
-  EXPECT_FALSE(m2.Matches(0.1));
-  EXPECT_EQ("g_bar or zero", Describe(m2));
-}
-
-// Tests implementing a polymorphic matcher using MatchAndExplain().
-
-class PolymorphicIsEvenImpl {
- public:
-  void DescribeTo(ostream* os) const { *os << "is even"; }
-
-  void DescribeNegationTo(ostream* os) const {
-    *os << "is odd";
-  }
-
-  template <typename T>
-  bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
-    // Verifies that we can stream to the listener directly.
-    *listener << "% " << 2;
-    if (listener->stream() != nullptr) {
-      // Verifies that we can stream to the listener's underlying stream
-      // too.
-      *listener->stream() << " == " << (x % 2);
-    }
-    return (x % 2) == 0;
-  }
-};
-
-PolymorphicMatcher<PolymorphicIsEvenImpl> PolymorphicIsEven() {
-  return MakePolymorphicMatcher(PolymorphicIsEvenImpl());
-}
-
-TEST(MakePolymorphicMatcherTest, ConstructsMatcherUsingNewAPI) {
-  // Using PolymorphicIsEven() as a Matcher<int>.
-  const Matcher<int> m1 = PolymorphicIsEven();
-  EXPECT_TRUE(m1.Matches(42));
-  EXPECT_FALSE(m1.Matches(43));
-  EXPECT_EQ("is even", Describe(m1));
-
-  const Matcher<int> not_m1 = Not(m1);
-  EXPECT_EQ("is odd", Describe(not_m1));
-
-  EXPECT_EQ("% 2 == 0", Explain(m1, 42));
-
-  // Using PolymorphicIsEven() as a Matcher<char>.
-  const Matcher<char> m2 = PolymorphicIsEven();
-  EXPECT_TRUE(m2.Matches('\x42'));
-  EXPECT_FALSE(m2.Matches('\x43'));
-  EXPECT_EQ("is even", Describe(m2));
-
-  const Matcher<char> not_m2 = Not(m2);
-  EXPECT_EQ("is odd", Describe(not_m2));
-
-  EXPECT_EQ("% 2 == 0", Explain(m2, '\x42'));
-}
-
-// Tests that MatcherCast<T>(m) works when m is a polymorphic matcher.
-TEST(MatcherCastTest, FromPolymorphicMatcher) {
-  Matcher<int> m = MatcherCast<int>(Eq(5));
-  EXPECT_TRUE(m.Matches(5));
-  EXPECT_FALSE(m.Matches(6));
-}
-
-// For testing casting matchers between compatible types.
-class IntValue {
- public:
-  // An int can be statically (although not implicitly) cast to a
-  // IntValue.
-  explicit IntValue(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
- private:
-  int value_;
-};
-
-// For testing casting matchers between compatible types.
-bool IsPositiveIntValue(const IntValue& foo) {
-  return foo.value() > 0;
-}
-
-// Tests that MatcherCast<T>(m) works when m is a Matcher<U> where T
-// can be statically converted to U.
-TEST(MatcherCastTest, FromCompatibleType) {
-  Matcher<double> m1 = Eq(2.0);
-  Matcher<int> m2 = MatcherCast<int>(m1);
-  EXPECT_TRUE(m2.Matches(2));
-  EXPECT_FALSE(m2.Matches(3));
-
-  Matcher<IntValue> m3 = Truly(IsPositiveIntValue);
-  Matcher<int> m4 = MatcherCast<int>(m3);
-  // In the following, the arguments 1 and 0 are statically converted
-  // to IntValue objects, and then tested by the IsPositiveIntValue()
-  // predicate.
-  EXPECT_TRUE(m4.Matches(1));
-  EXPECT_FALSE(m4.Matches(0));
-}
-
-// Tests that MatcherCast<T>(m) works when m is a Matcher<const T&>.
-TEST(MatcherCastTest, FromConstReferenceToNonReference) {
-  Matcher<const int&> m1 = Eq(0);
-  Matcher<int> m2 = MatcherCast<int>(m1);
-  EXPECT_TRUE(m2.Matches(0));
-  EXPECT_FALSE(m2.Matches(1));
-}
-
-// Tests that MatcherCast<T>(m) works when m is a Matcher<T&>.
-TEST(MatcherCastTest, FromReferenceToNonReference) {
-  Matcher<int&> m1 = Eq(0);
-  Matcher<int> m2 = MatcherCast<int>(m1);
-  EXPECT_TRUE(m2.Matches(0));
-  EXPECT_FALSE(m2.Matches(1));
-}
-
-// Tests that MatcherCast<const T&>(m) works when m is a Matcher<T>.
-TEST(MatcherCastTest, FromNonReferenceToConstReference) {
-  Matcher<int> m1 = Eq(0);
-  Matcher<const int&> m2 = MatcherCast<const int&>(m1);
-  EXPECT_TRUE(m2.Matches(0));
-  EXPECT_FALSE(m2.Matches(1));
-}
-
-// Tests that MatcherCast<T&>(m) works when m is a Matcher<T>.
-TEST(MatcherCastTest, FromNonReferenceToReference) {
-  Matcher<int> m1 = Eq(0);
-  Matcher<int&> m2 = MatcherCast<int&>(m1);
-  int n = 0;
-  EXPECT_TRUE(m2.Matches(n));
-  n = 1;
-  EXPECT_FALSE(m2.Matches(n));
-}
-
-// Tests that MatcherCast<T>(m) works when m is a Matcher<T>.
-TEST(MatcherCastTest, FromSameType) {
-  Matcher<int> m1 = Eq(0);
-  Matcher<int> m2 = MatcherCast<int>(m1);
-  EXPECT_TRUE(m2.Matches(0));
-  EXPECT_FALSE(m2.Matches(1));
-}
-
-// Tests that MatcherCast<T>(m) works when m is a value of the same type as the
-// value type of the Matcher.
-TEST(MatcherCastTest, FromAValue) {
-  Matcher<int> m = MatcherCast<int>(42);
-  EXPECT_TRUE(m.Matches(42));
-  EXPECT_FALSE(m.Matches(239));
-}
-
-// Tests that MatcherCast<T>(m) works when m is a value of the type implicitly
-// convertible to the value type of the Matcher.
-TEST(MatcherCastTest, FromAnImplicitlyConvertibleValue) {
-  const int kExpected = 'c';
-  Matcher<int> m = MatcherCast<int>('c');
-  EXPECT_TRUE(m.Matches(kExpected));
-  EXPECT_FALSE(m.Matches(kExpected + 1));
-}
-
-struct NonImplicitlyConstructibleTypeWithOperatorEq {
-  friend bool operator==(
-      const NonImplicitlyConstructibleTypeWithOperatorEq& /* ignored */,
-      int rhs) {
-    return 42 == rhs;
-  }
-  friend bool operator==(
-      int lhs,
-      const NonImplicitlyConstructibleTypeWithOperatorEq& /* ignored */) {
-    return lhs == 42;
-  }
-};
-
-// Tests that MatcherCast<T>(m) works when m is a neither a matcher nor
-// implicitly convertible to the value type of the Matcher, but the value type
-// of the matcher has operator==() overload accepting m.
-TEST(MatcherCastTest, NonImplicitlyConstructibleTypeWithOperatorEq) {
-  Matcher<NonImplicitlyConstructibleTypeWithOperatorEq> m1 =
-      MatcherCast<NonImplicitlyConstructibleTypeWithOperatorEq>(42);
-  EXPECT_TRUE(m1.Matches(NonImplicitlyConstructibleTypeWithOperatorEq()));
-
-  Matcher<NonImplicitlyConstructibleTypeWithOperatorEq> m2 =
-      MatcherCast<NonImplicitlyConstructibleTypeWithOperatorEq>(239);
-  EXPECT_FALSE(m2.Matches(NonImplicitlyConstructibleTypeWithOperatorEq()));
-
-  // When updating the following lines please also change the comment to
-  // namespace convertible_from_any.
-  Matcher<int> m3 =
-      MatcherCast<int>(NonImplicitlyConstructibleTypeWithOperatorEq());
-  EXPECT_TRUE(m3.Matches(42));
-  EXPECT_FALSE(m3.Matches(239));
-}
-
-// ConvertibleFromAny does not work with MSVC. resulting in
-// error C2440: 'initializing': cannot convert from 'Eq' to 'M'
-// No constructor could take the source type, or constructor overload
-// resolution was ambiguous
-
-#if !defined _MSC_VER
-
-// The below ConvertibleFromAny struct is implicitly constructible from anything
-// and when in the same namespace can interact with other tests. In particular,
-// if it is in the same namespace as other tests and one removes
-//   NonImplicitlyConstructibleTypeWithOperatorEq::operator==(int lhs, ...);
-// then the corresponding test still compiles (and it should not!) by implicitly
-// converting NonImplicitlyConstructibleTypeWithOperatorEq to ConvertibleFromAny
-// in m3.Matcher().
-namespace convertible_from_any {
-// Implicitly convertible from any type.
-struct ConvertibleFromAny {
-  ConvertibleFromAny(int a_value) : value(a_value) {}
-  template <typename T>
-  ConvertibleFromAny(const T& /*a_value*/) : value(-1) {
-    ADD_FAILURE() << "Conversion constructor called";
-  }
-  int value;
-};
-
-bool operator==(const ConvertibleFromAny& a, const ConvertibleFromAny& b) {
-  return a.value == b.value;
-}
-
-ostream& operator<<(ostream& os, const ConvertibleFromAny& a) {
-  return os << a.value;
-}
-
-TEST(MatcherCastTest, ConversionConstructorIsUsed) {
-  Matcher<ConvertibleFromAny> m = MatcherCast<ConvertibleFromAny>(1);
-  EXPECT_TRUE(m.Matches(ConvertibleFromAny(1)));
-  EXPECT_FALSE(m.Matches(ConvertibleFromAny(2)));
-}
-
-TEST(MatcherCastTest, FromConvertibleFromAny) {
-  Matcher<ConvertibleFromAny> m =
-      MatcherCast<ConvertibleFromAny>(Eq(ConvertibleFromAny(1)));
-  EXPECT_TRUE(m.Matches(ConvertibleFromAny(1)));
-  EXPECT_FALSE(m.Matches(ConvertibleFromAny(2)));
-}
-}  // namespace convertible_from_any
-
-#endif  // !defined _MSC_VER
-
-struct IntReferenceWrapper {
-  IntReferenceWrapper(const int& a_value) : value(&a_value) {}
-  const int* value;
-};
-
-bool operator==(const IntReferenceWrapper& a, const IntReferenceWrapper& b) {
-  return a.value == b.value;
-}
-
-TEST(MatcherCastTest, ValueIsNotCopied) {
-  int n = 42;
-  Matcher<IntReferenceWrapper> m = MatcherCast<IntReferenceWrapper>(n);
-  // Verify that the matcher holds a reference to n, not to its temporary copy.
-  EXPECT_TRUE(m.Matches(n));
-}
-
-class Base {
- public:
-  virtual ~Base() {}
-  Base() {}
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Base);
-};
-
-class Derived : public Base {
- public:
-  Derived() : Base() {}
-  int i;
-};
-
-class OtherDerived : public Base {};
-
-// Tests that SafeMatcherCast<T>(m) works when m is a polymorphic matcher.
-TEST(SafeMatcherCastTest, FromPolymorphicMatcher) {
-  Matcher<char> m2 = SafeMatcherCast<char>(Eq(32));
-  EXPECT_TRUE(m2.Matches(' '));
-  EXPECT_FALSE(m2.Matches('\n'));
-}
-
-// Tests that SafeMatcherCast<T>(m) works when m is a Matcher<U> where
-// T and U are arithmetic types and T can be losslessly converted to
-// U.
-TEST(SafeMatcherCastTest, FromLosslesslyConvertibleArithmeticType) {
-  Matcher<double> m1 = DoubleEq(1.0);
-  Matcher<float> m2 = SafeMatcherCast<float>(m1);
-  EXPECT_TRUE(m2.Matches(1.0f));
-  EXPECT_FALSE(m2.Matches(2.0f));
-
-  Matcher<char> m3 = SafeMatcherCast<char>(TypedEq<int>('a'));
-  EXPECT_TRUE(m3.Matches('a'));
-  EXPECT_FALSE(m3.Matches('b'));
-}
-
-// Tests that SafeMatcherCast<T>(m) works when m is a Matcher<U> where T and U
-// are pointers or references to a derived and a base class, correspondingly.
-TEST(SafeMatcherCastTest, FromBaseClass) {
-  Derived d, d2;
-  Matcher<Base*> m1 = Eq(&d);
-  Matcher<Derived*> m2 = SafeMatcherCast<Derived*>(m1);
-  EXPECT_TRUE(m2.Matches(&d));
-  EXPECT_FALSE(m2.Matches(&d2));
-
-  Matcher<Base&> m3 = Ref(d);
-  Matcher<Derived&> m4 = SafeMatcherCast<Derived&>(m3);
-  EXPECT_TRUE(m4.Matches(d));
-  EXPECT_FALSE(m4.Matches(d2));
-}
-
-// Tests that SafeMatcherCast<T&>(m) works when m is a Matcher<const T&>.
-TEST(SafeMatcherCastTest, FromConstReferenceToReference) {
-  int n = 0;
-  Matcher<const int&> m1 = Ref(n);
-  Matcher<int&> m2 = SafeMatcherCast<int&>(m1);
-  int n1 = 0;
-  EXPECT_TRUE(m2.Matches(n));
-  EXPECT_FALSE(m2.Matches(n1));
-}
-
-// Tests that MatcherCast<const T&>(m) works when m is a Matcher<T>.
-TEST(SafeMatcherCastTest, FromNonReferenceToConstReference) {
-  Matcher<std::unique_ptr<int>> m1 = IsNull();
-  Matcher<const std::unique_ptr<int>&> m2 =
-      SafeMatcherCast<const std::unique_ptr<int>&>(m1);
-  EXPECT_TRUE(m2.Matches(std::unique_ptr<int>()));
-  EXPECT_FALSE(m2.Matches(std::unique_ptr<int>(new int)));
-}
-
-// Tests that SafeMatcherCast<T&>(m) works when m is a Matcher<T>.
-TEST(SafeMatcherCastTest, FromNonReferenceToReference) {
-  Matcher<int> m1 = Eq(0);
-  Matcher<int&> m2 = SafeMatcherCast<int&>(m1);
-  int n = 0;
-  EXPECT_TRUE(m2.Matches(n));
-  n = 1;
-  EXPECT_FALSE(m2.Matches(n));
-}
-
-// Tests that SafeMatcherCast<T>(m) works when m is a Matcher<T>.
-TEST(SafeMatcherCastTest, FromSameType) {
-  Matcher<int> m1 = Eq(0);
-  Matcher<int> m2 = SafeMatcherCast<int>(m1);
-  EXPECT_TRUE(m2.Matches(0));
-  EXPECT_FALSE(m2.Matches(1));
-}
-
-#if !defined _MSC_VER
-
-namespace convertible_from_any {
-TEST(SafeMatcherCastTest, ConversionConstructorIsUsed) {
-  Matcher<ConvertibleFromAny> m = SafeMatcherCast<ConvertibleFromAny>(1);
-  EXPECT_TRUE(m.Matches(ConvertibleFromAny(1)));
-  EXPECT_FALSE(m.Matches(ConvertibleFromAny(2)));
-}
-
-TEST(SafeMatcherCastTest, FromConvertibleFromAny) {
-  Matcher<ConvertibleFromAny> m =
-      SafeMatcherCast<ConvertibleFromAny>(Eq(ConvertibleFromAny(1)));
-  EXPECT_TRUE(m.Matches(ConvertibleFromAny(1)));
-  EXPECT_FALSE(m.Matches(ConvertibleFromAny(2)));
-}
-}  // namespace convertible_from_any
-
-#endif  // !defined _MSC_VER
-
-TEST(SafeMatcherCastTest, ValueIsNotCopied) {
-  int n = 42;
-  Matcher<IntReferenceWrapper> m = SafeMatcherCast<IntReferenceWrapper>(n);
-  // Verify that the matcher holds a reference to n, not to its temporary copy.
-  EXPECT_TRUE(m.Matches(n));
-}
-
-TEST(ExpectThat, TakesLiterals) {
-  EXPECT_THAT(1, 1);
-  EXPECT_THAT(1.0, 1.0);
-  EXPECT_THAT(std::string(), "");
-}
-
-TEST(ExpectThat, TakesFunctions) {
-  struct Helper {
-    static void Func() {}
-  };
-  void (*func)() = Helper::Func;
-  EXPECT_THAT(func, Helper::Func);
-  EXPECT_THAT(func, &Helper::Func);
-}
-
-// Tests that A<T>() matches any value of type T.
-TEST(ATest, MatchesAnyValue) {
-  // Tests a matcher for a value type.
-  Matcher<double> m1 = A<double>();
-  EXPECT_TRUE(m1.Matches(91.43));
-  EXPECT_TRUE(m1.Matches(-15.32));
-
-  // Tests a matcher for a reference type.
-  int a = 2;
-  int b = -6;
-  Matcher<int&> m2 = A<int&>();
-  EXPECT_TRUE(m2.Matches(a));
-  EXPECT_TRUE(m2.Matches(b));
-}
-
-TEST(ATest, WorksForDerivedClass) {
-  Base base;
-  Derived derived;
-  EXPECT_THAT(&base, A<Base*>());
-  // This shouldn't compile: EXPECT_THAT(&base, A<Derived*>());
-  EXPECT_THAT(&derived, A<Base*>());
-  EXPECT_THAT(&derived, A<Derived*>());
-}
-
-// Tests that A<T>() describes itself properly.
-TEST(ATest, CanDescribeSelf) {
-  EXPECT_EQ("is anything", Describe(A<bool>()));
-}
-
-// Tests that An<T>() matches any value of type T.
-TEST(AnTest, MatchesAnyValue) {
-  // Tests a matcher for a value type.
-  Matcher<int> m1 = An<int>();
-  EXPECT_TRUE(m1.Matches(9143));
-  EXPECT_TRUE(m1.Matches(-1532));
-
-  // Tests a matcher for a reference type.
-  int a = 2;
-  int b = -6;
-  Matcher<int&> m2 = An<int&>();
-  EXPECT_TRUE(m2.Matches(a));
-  EXPECT_TRUE(m2.Matches(b));
-}
-
-// Tests that An<T>() describes itself properly.
-TEST(AnTest, CanDescribeSelf) {
-  EXPECT_EQ("is anything", Describe(An<int>()));
-}
-
-// Tests that _ can be used as a matcher for any type and matches any
-// value of that type.
-TEST(UnderscoreTest, MatchesAnyValue) {
-  // Uses _ as a matcher for a value type.
-  Matcher<int> m1 = _;
-  EXPECT_TRUE(m1.Matches(123));
-  EXPECT_TRUE(m1.Matches(-242));
-
-  // Uses _ as a matcher for a reference type.
-  bool a = false;
-  const bool b = true;
-  Matcher<const bool&> m2 = _;
-  EXPECT_TRUE(m2.Matches(a));
-  EXPECT_TRUE(m2.Matches(b));
-}
-
-// Tests that _ describes itself properly.
-TEST(UnderscoreTest, CanDescribeSelf) {
-  Matcher<int> m = _;
-  EXPECT_EQ("is anything", Describe(m));
-}
-
-// Tests that Eq(x) matches any value equal to x.
-TEST(EqTest, MatchesEqualValue) {
-  // 2 C-strings with same content but different addresses.
-  const char a1[] = "hi";
-  const char a2[] = "hi";
-
-  Matcher<const char*> m1 = Eq(a1);
-  EXPECT_TRUE(m1.Matches(a1));
-  EXPECT_FALSE(m1.Matches(a2));
-}
-
-// Tests that Eq(v) describes itself properly.
-
-class Unprintable {
- public:
-  Unprintable() : c_('a') {}
-
-  bool operator==(const Unprintable& /* rhs */) const { return true; }
-  // -Wunused-private-field: dummy accessor for `c_`.
-  char dummy_c() { return c_; }
- private:
-  char c_;
-};
-
-TEST(EqTest, CanDescribeSelf) {
-  Matcher<Unprintable> m = Eq(Unprintable());
-  EXPECT_EQ("is equal to 1-byte object <61>", Describe(m));
-}
-
-// Tests that Eq(v) can be used to match any type that supports
-// comparing with type T, where T is v's type.
-TEST(EqTest, IsPolymorphic) {
-  Matcher<int> m1 = Eq(1);
-  EXPECT_TRUE(m1.Matches(1));
-  EXPECT_FALSE(m1.Matches(2));
-
-  Matcher<char> m2 = Eq(1);
-  EXPECT_TRUE(m2.Matches('\1'));
-  EXPECT_FALSE(m2.Matches('a'));
-}
-
-// Tests that TypedEq<T>(v) matches values of type T that's equal to v.
-TEST(TypedEqTest, ChecksEqualityForGivenType) {
-  Matcher<char> m1 = TypedEq<char>('a');
-  EXPECT_TRUE(m1.Matches('a'));
-  EXPECT_FALSE(m1.Matches('b'));
-
-  Matcher<int> m2 = TypedEq<int>(6);
-  EXPECT_TRUE(m2.Matches(6));
-  EXPECT_FALSE(m2.Matches(7));
-}
-
-// Tests that TypedEq(v) describes itself properly.
-TEST(TypedEqTest, CanDescribeSelf) {
-  EXPECT_EQ("is equal to 2", Describe(TypedEq<int>(2)));
-}
-
-// Tests that TypedEq<T>(v) has type Matcher<T>.
-
-// Type<T>::IsTypeOf(v) compiles if and only if the type of value v is T, where
-// T is a "bare" type (i.e. not in the form of const U or U&).  If v's type is
-// not T, the compiler will generate a message about "undefined reference".
-template <typename T>
-struct Type {
-  static bool IsTypeOf(const T& /* v */) { return true; }
-
-  template <typename T2>
-  static void IsTypeOf(T2 v);
-};
-
-TEST(TypedEqTest, HasSpecifiedType) {
-  // Verfies that the type of TypedEq<T>(v) is Matcher<T>.
-  Type<Matcher<int> >::IsTypeOf(TypedEq<int>(5));
-  Type<Matcher<double> >::IsTypeOf(TypedEq<double>(5));
-}
-
-// Tests that Ge(v) matches anything >= v.
-TEST(GeTest, ImplementsGreaterThanOrEqual) {
-  Matcher<int> m1 = Ge(0);
-  EXPECT_TRUE(m1.Matches(1));
-  EXPECT_TRUE(m1.Matches(0));
-  EXPECT_FALSE(m1.Matches(-1));
-}
-
-// Tests that Ge(v) describes itself properly.
-TEST(GeTest, CanDescribeSelf) {
-  Matcher<int> m = Ge(5);
-  EXPECT_EQ("is >= 5", Describe(m));
-}
-
-// Tests that Gt(v) matches anything > v.
-TEST(GtTest, ImplementsGreaterThan) {
-  Matcher<double> m1 = Gt(0);
-  EXPECT_TRUE(m1.Matches(1.0));
-  EXPECT_FALSE(m1.Matches(0.0));
-  EXPECT_FALSE(m1.Matches(-1.0));
-}
-
-// Tests that Gt(v) describes itself properly.
-TEST(GtTest, CanDescribeSelf) {
-  Matcher<int> m = Gt(5);
-  EXPECT_EQ("is > 5", Describe(m));
-}
-
-// Tests that Le(v) matches anything <= v.
-TEST(LeTest, ImplementsLessThanOrEqual) {
-  Matcher<char> m1 = Le('b');
-  EXPECT_TRUE(m1.Matches('a'));
-  EXPECT_TRUE(m1.Matches('b'));
-  EXPECT_FALSE(m1.Matches('c'));
-}
-
-// Tests that Le(v) describes itself properly.
-TEST(LeTest, CanDescribeSelf) {
-  Matcher<int> m = Le(5);
-  EXPECT_EQ("is <= 5", Describe(m));
-}
-
-// Tests that Lt(v) matches anything < v.
-TEST(LtTest, ImplementsLessThan) {
-  Matcher<const std::string&> m1 = Lt("Hello");
-  EXPECT_TRUE(m1.Matches("Abc"));
-  EXPECT_FALSE(m1.Matches("Hello"));
-  EXPECT_FALSE(m1.Matches("Hello, world!"));
-}
-
-// Tests that Lt(v) describes itself properly.
-TEST(LtTest, CanDescribeSelf) {
-  Matcher<int> m = Lt(5);
-  EXPECT_EQ("is < 5", Describe(m));
-}
-
-// Tests that Ne(v) matches anything != v.
-TEST(NeTest, ImplementsNotEqual) {
-  Matcher<int> m1 = Ne(0);
-  EXPECT_TRUE(m1.Matches(1));
-  EXPECT_TRUE(m1.Matches(-1));
-  EXPECT_FALSE(m1.Matches(0));
-}
-
-// Tests that Ne(v) describes itself properly.
-TEST(NeTest, CanDescribeSelf) {
-  Matcher<int> m = Ne(5);
-  EXPECT_EQ("isn't equal to 5", Describe(m));
-}
-
-class MoveOnly {
- public:
-  explicit MoveOnly(int i) : i_(i) {}
-  MoveOnly(const MoveOnly&) = delete;
-  MoveOnly(MoveOnly&&) = default;
-  MoveOnly& operator=(const MoveOnly&) = delete;
-  MoveOnly& operator=(MoveOnly&&) = default;
-
-  bool operator==(const MoveOnly& other) const { return i_ == other.i_; }
-  bool operator!=(const MoveOnly& other) const { return i_ != other.i_; }
-  bool operator<(const MoveOnly& other) const { return i_ < other.i_; }
-  bool operator<=(const MoveOnly& other) const { return i_ <= other.i_; }
-  bool operator>(const MoveOnly& other) const { return i_ > other.i_; }
-  bool operator>=(const MoveOnly& other) const { return i_ >= other.i_; }
-
- private:
-  int i_;
-};
-
-struct MoveHelper {
-  MOCK_METHOD1(Call, void(MoveOnly));
-};
-
-// Disable this test in VS 2015 (version 14), where it fails when SEH is enabled
-#if defined(_MSC_VER) && (_MSC_VER < 1910)
-TEST(ComparisonBaseTest, DISABLED_WorksWithMoveOnly) {
-#else
-TEST(ComparisonBaseTest, WorksWithMoveOnly) {
-#endif
-  MoveOnly m{0};
-  MoveHelper helper;
-
-  EXPECT_CALL(helper, Call(Eq(ByRef(m))));
-  helper.Call(MoveOnly(0));
-  EXPECT_CALL(helper, Call(Ne(ByRef(m))));
-  helper.Call(MoveOnly(1));
-  EXPECT_CALL(helper, Call(Le(ByRef(m))));
-  helper.Call(MoveOnly(0));
-  EXPECT_CALL(helper, Call(Lt(ByRef(m))));
-  helper.Call(MoveOnly(-1));
-  EXPECT_CALL(helper, Call(Ge(ByRef(m))));
-  helper.Call(MoveOnly(0));
-  EXPECT_CALL(helper, Call(Gt(ByRef(m))));
-  helper.Call(MoveOnly(1));
-}
-
-// Tests that IsNull() matches any NULL pointer of any type.
-TEST(IsNullTest, MatchesNullPointer) {
-  Matcher<int*> m1 = IsNull();
-  int* p1 = nullptr;
-  int n = 0;
-  EXPECT_TRUE(m1.Matches(p1));
-  EXPECT_FALSE(m1.Matches(&n));
-
-  Matcher<const char*> m2 = IsNull();
-  const char* p2 = nullptr;
-  EXPECT_TRUE(m2.Matches(p2));
-  EXPECT_FALSE(m2.Matches("hi"));
-
-  Matcher<void*> m3 = IsNull();
-  void* p3 = nullptr;
-  EXPECT_TRUE(m3.Matches(p3));
-  EXPECT_FALSE(m3.Matches(reinterpret_cast<void*>(0xbeef)));
-}
-
-TEST(IsNullTest, StdFunction) {
-  const Matcher<std::function<void()>> m = IsNull();
-
-  EXPECT_TRUE(m.Matches(std::function<void()>()));
-  EXPECT_FALSE(m.Matches([]{}));
-}
-
-// Tests that IsNull() describes itself properly.
-TEST(IsNullTest, CanDescribeSelf) {
-  Matcher<int*> m = IsNull();
-  EXPECT_EQ("is NULL", Describe(m));
-  EXPECT_EQ("isn't NULL", DescribeNegation(m));
-}
-
-// Tests that NotNull() matches any non-NULL pointer of any type.
-TEST(NotNullTest, MatchesNonNullPointer) {
-  Matcher<int*> m1 = NotNull();
-  int* p1 = nullptr;
-  int n = 0;
-  EXPECT_FALSE(m1.Matches(p1));
-  EXPECT_TRUE(m1.Matches(&n));
-
-  Matcher<const char*> m2 = NotNull();
-  const char* p2 = nullptr;
-  EXPECT_FALSE(m2.Matches(p2));
-  EXPECT_TRUE(m2.Matches("hi"));
-}
-
-TEST(NotNullTest, LinkedPtr) {
-  const Matcher<std::shared_ptr<int>> m = NotNull();
-  const std::shared_ptr<int> null_p;
-  const std::shared_ptr<int> non_null_p(new int);
-
-  EXPECT_FALSE(m.Matches(null_p));
-  EXPECT_TRUE(m.Matches(non_null_p));
-}
-
-TEST(NotNullTest, ReferenceToConstLinkedPtr) {
-  const Matcher<const std::shared_ptr<double>&> m = NotNull();
-  const std::shared_ptr<double> null_p;
-  const std::shared_ptr<double> non_null_p(new double);
-
-  EXPECT_FALSE(m.Matches(null_p));
-  EXPECT_TRUE(m.Matches(non_null_p));
-}
-
-TEST(NotNullTest, StdFunction) {
-  const Matcher<std::function<void()>> m = NotNull();
-
-  EXPECT_TRUE(m.Matches([]{}));
-  EXPECT_FALSE(m.Matches(std::function<void()>()));
-}
-
-// Tests that NotNull() describes itself properly.
-TEST(NotNullTest, CanDescribeSelf) {
-  Matcher<int*> m = NotNull();
-  EXPECT_EQ("isn't NULL", Describe(m));
-}
-
-// Tests that Ref(variable) matches an argument that references
-// 'variable'.
-TEST(RefTest, MatchesSameVariable) {
-  int a = 0;
-  int b = 0;
-  Matcher<int&> m = Ref(a);
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_FALSE(m.Matches(b));
-}
-
-// Tests that Ref(variable) describes itself properly.
-TEST(RefTest, CanDescribeSelf) {
-  int n = 5;
-  Matcher<int&> m = Ref(n);
-  stringstream ss;
-  ss << "references the variable @" << &n << " 5";
-  EXPECT_EQ(ss.str(), Describe(m));
-}
-
-// Test that Ref(non_const_varialbe) can be used as a matcher for a
-// const reference.
-TEST(RefTest, CanBeUsedAsMatcherForConstReference) {
-  int a = 0;
-  int b = 0;
-  Matcher<const int&> m = Ref(a);
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_FALSE(m.Matches(b));
-}
-
-// Tests that Ref(variable) is covariant, i.e. Ref(derived) can be
-// used wherever Ref(base) can be used (Ref(derived) is a sub-type
-// of Ref(base), but not vice versa.
-
-TEST(RefTest, IsCovariant) {
-  Base base, base2;
-  Derived derived;
-  Matcher<const Base&> m1 = Ref(base);
-  EXPECT_TRUE(m1.Matches(base));
-  EXPECT_FALSE(m1.Matches(base2));
-  EXPECT_FALSE(m1.Matches(derived));
-
-  m1 = Ref(derived);
-  EXPECT_TRUE(m1.Matches(derived));
-  EXPECT_FALSE(m1.Matches(base));
-  EXPECT_FALSE(m1.Matches(base2));
-}
-
-TEST(RefTest, ExplainsResult) {
-  int n = 0;
-  EXPECT_THAT(Explain(Matcher<const int&>(Ref(n)), n),
-              StartsWith("which is located @"));
-
-  int m = 0;
-  EXPECT_THAT(Explain(Matcher<const int&>(Ref(n)), m),
-              StartsWith("which is located @"));
-}
-
-// Tests string comparison matchers.
-
-template <typename T = std::string>
-std::string FromStringLike(internal::StringLike<T> str) {
-  return std::string(str);
-}
-
-TEST(StringLike, TestConversions) {
-  EXPECT_EQ("foo", FromStringLike("foo"));
-  EXPECT_EQ("foo", FromStringLike(std::string("foo")));
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  EXPECT_EQ("foo", FromStringLike(internal::StringView("foo")));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Non deducible types.
-  EXPECT_EQ("", FromStringLike({}));
-  EXPECT_EQ("foo", FromStringLike({'f', 'o', 'o'}));
-  const char buf[] = "foo";
-  EXPECT_EQ("foo", FromStringLike({buf, buf + 3}));
-}
-
-TEST(StrEqTest, MatchesEqualString) {
-  Matcher<const char*> m = StrEq(std::string("Hello"));
-  EXPECT_TRUE(m.Matches("Hello"));
-  EXPECT_FALSE(m.Matches("hello"));
-  EXPECT_FALSE(m.Matches(nullptr));
-
-  Matcher<const std::string&> m2 = StrEq("Hello");
-  EXPECT_TRUE(m2.Matches("Hello"));
-  EXPECT_FALSE(m2.Matches("Hi"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  Matcher<const internal::StringView&> m3 =
-      StrEq(internal::StringView("Hello"));
-  EXPECT_TRUE(m3.Matches(internal::StringView("Hello")));
-  EXPECT_FALSE(m3.Matches(internal::StringView("hello")));
-  EXPECT_FALSE(m3.Matches(internal::StringView()));
-
-  Matcher<const internal::StringView&> m_empty = StrEq("");
-  EXPECT_TRUE(m_empty.Matches(internal::StringView("")));
-  EXPECT_TRUE(m_empty.Matches(internal::StringView()));
-  EXPECT_FALSE(m_empty.Matches(internal::StringView("hello")));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(StrEqTest, CanDescribeSelf) {
-  Matcher<std::string> m = StrEq("Hi-\'\"?\\\a\b\f\n\r\t\v\xD3");
-  EXPECT_EQ("is equal to \"Hi-\'\\\"?\\\\\\a\\b\\f\\n\\r\\t\\v\\xD3\"",
-      Describe(m));
-
-  std::string str("01204500800");
-  str[3] = '\0';
-  Matcher<std::string> m2 = StrEq(str);
-  EXPECT_EQ("is equal to \"012\\04500800\"", Describe(m2));
-  str[0] = str[6] = str[7] = str[9] = str[10] = '\0';
-  Matcher<std::string> m3 = StrEq(str);
-  EXPECT_EQ("is equal to \"\\012\\045\\0\\08\\0\\0\"", Describe(m3));
-}
-
-TEST(StrNeTest, MatchesUnequalString) {
-  Matcher<const char*> m = StrNe("Hello");
-  EXPECT_TRUE(m.Matches(""));
-  EXPECT_TRUE(m.Matches(nullptr));
-  EXPECT_FALSE(m.Matches("Hello"));
-
-  Matcher<std::string> m2 = StrNe(std::string("Hello"));
-  EXPECT_TRUE(m2.Matches("hello"));
-  EXPECT_FALSE(m2.Matches("Hello"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  Matcher<const internal::StringView> m3 = StrNe(internal::StringView("Hello"));
-  EXPECT_TRUE(m3.Matches(internal::StringView("")));
-  EXPECT_TRUE(m3.Matches(internal::StringView()));
-  EXPECT_FALSE(m3.Matches(internal::StringView("Hello")));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(StrNeTest, CanDescribeSelf) {
-  Matcher<const char*> m = StrNe("Hi");
-  EXPECT_EQ("isn't equal to \"Hi\"", Describe(m));
-}
-
-TEST(StrCaseEqTest, MatchesEqualStringIgnoringCase) {
-  Matcher<const char*> m = StrCaseEq(std::string("Hello"));
-  EXPECT_TRUE(m.Matches("Hello"));
-  EXPECT_TRUE(m.Matches("hello"));
-  EXPECT_FALSE(m.Matches("Hi"));
-  EXPECT_FALSE(m.Matches(nullptr));
-
-  Matcher<const std::string&> m2 = StrCaseEq("Hello");
-  EXPECT_TRUE(m2.Matches("hello"));
-  EXPECT_FALSE(m2.Matches("Hi"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  Matcher<const internal::StringView&> m3 =
-      StrCaseEq(internal::StringView("Hello"));
-  EXPECT_TRUE(m3.Matches(internal::StringView("Hello")));
-  EXPECT_TRUE(m3.Matches(internal::StringView("hello")));
-  EXPECT_FALSE(m3.Matches(internal::StringView("Hi")));
-  EXPECT_FALSE(m3.Matches(internal::StringView()));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(StrCaseEqTest, MatchesEqualStringWith0IgnoringCase) {
-  std::string str1("oabocdooeoo");
-  std::string str2("OABOCDOOEOO");
-  Matcher<const std::string&> m0 = StrCaseEq(str1);
-  EXPECT_FALSE(m0.Matches(str2 + std::string(1, '\0')));
-
-  str1[3] = str2[3] = '\0';
-  Matcher<const std::string&> m1 = StrCaseEq(str1);
-  EXPECT_TRUE(m1.Matches(str2));
-
-  str1[0] = str1[6] = str1[7] = str1[10] = '\0';
-  str2[0] = str2[6] = str2[7] = str2[10] = '\0';
-  Matcher<const std::string&> m2 = StrCaseEq(str1);
-  str1[9] = str2[9] = '\0';
-  EXPECT_FALSE(m2.Matches(str2));
-
-  Matcher<const std::string&> m3 = StrCaseEq(str1);
-  EXPECT_TRUE(m3.Matches(str2));
-
-  EXPECT_FALSE(m3.Matches(str2 + "x"));
-  str2.append(1, '\0');
-  EXPECT_FALSE(m3.Matches(str2));
-  EXPECT_FALSE(m3.Matches(std::string(str2, 0, 9)));
-}
-
-TEST(StrCaseEqTest, CanDescribeSelf) {
-  Matcher<std::string> m = StrCaseEq("Hi");
-  EXPECT_EQ("is equal to (ignoring case) \"Hi\"", Describe(m));
-}
-
-TEST(StrCaseNeTest, MatchesUnequalStringIgnoringCase) {
-  Matcher<const char*> m = StrCaseNe("Hello");
-  EXPECT_TRUE(m.Matches("Hi"));
-  EXPECT_TRUE(m.Matches(nullptr));
-  EXPECT_FALSE(m.Matches("Hello"));
-  EXPECT_FALSE(m.Matches("hello"));
-
-  Matcher<std::string> m2 = StrCaseNe(std::string("Hello"));
-  EXPECT_TRUE(m2.Matches(""));
-  EXPECT_FALSE(m2.Matches("Hello"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  Matcher<const internal::StringView> m3 =
-      StrCaseNe(internal::StringView("Hello"));
-  EXPECT_TRUE(m3.Matches(internal::StringView("Hi")));
-  EXPECT_TRUE(m3.Matches(internal::StringView()));
-  EXPECT_FALSE(m3.Matches(internal::StringView("Hello")));
-  EXPECT_FALSE(m3.Matches(internal::StringView("hello")));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(StrCaseNeTest, CanDescribeSelf) {
-  Matcher<const char*> m = StrCaseNe("Hi");
-  EXPECT_EQ("isn't equal to (ignoring case) \"Hi\"", Describe(m));
-}
-
-// Tests that HasSubstr() works for matching string-typed values.
-TEST(HasSubstrTest, WorksForStringClasses) {
-  const Matcher<std::string> m1 = HasSubstr("foo");
-  EXPECT_TRUE(m1.Matches(std::string("I love food.")));
-  EXPECT_FALSE(m1.Matches(std::string("tofo")));
-
-  const Matcher<const std::string&> m2 = HasSubstr("foo");
-  EXPECT_TRUE(m2.Matches(std::string("I love food.")));
-  EXPECT_FALSE(m2.Matches(std::string("tofo")));
-
-  const Matcher<std::string> m_empty = HasSubstr("");
-  EXPECT_TRUE(m_empty.Matches(std::string()));
-  EXPECT_TRUE(m_empty.Matches(std::string("not empty")));
-}
-
-// Tests that HasSubstr() works for matching C-string-typed values.
-TEST(HasSubstrTest, WorksForCStrings) {
-  const Matcher<char*> m1 = HasSubstr("foo");
-  EXPECT_TRUE(m1.Matches(const_cast<char*>("I love food.")));
-  EXPECT_FALSE(m1.Matches(const_cast<char*>("tofo")));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const char*> m2 = HasSubstr("foo");
-  EXPECT_TRUE(m2.Matches("I love food."));
-  EXPECT_FALSE(m2.Matches("tofo"));
-  EXPECT_FALSE(m2.Matches(nullptr));
-
-  const Matcher<const char*> m_empty = HasSubstr("");
-  EXPECT_TRUE(m_empty.Matches("not empty"));
-  EXPECT_TRUE(m_empty.Matches(""));
-  EXPECT_FALSE(m_empty.Matches(nullptr));
-}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// Tests that HasSubstr() works for matching StringView-typed values.
-TEST(HasSubstrTest, WorksForStringViewClasses) {
-  const Matcher<internal::StringView> m1 =
-      HasSubstr(internal::StringView("foo"));
-  EXPECT_TRUE(m1.Matches(internal::StringView("I love food.")));
-  EXPECT_FALSE(m1.Matches(internal::StringView("tofo")));
-  EXPECT_FALSE(m1.Matches(internal::StringView()));
-
-  const Matcher<const internal::StringView&> m2 = HasSubstr("foo");
-  EXPECT_TRUE(m2.Matches(internal::StringView("I love food.")));
-  EXPECT_FALSE(m2.Matches(internal::StringView("tofo")));
-  EXPECT_FALSE(m2.Matches(internal::StringView()));
-
-  const Matcher<const internal::StringView&> m3 = HasSubstr("");
-  EXPECT_TRUE(m3.Matches(internal::StringView("foo")));
-  EXPECT_TRUE(m3.Matches(internal::StringView("")));
-  EXPECT_TRUE(m3.Matches(internal::StringView()));
-}
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-// Tests that HasSubstr(s) describes itself properly.
-TEST(HasSubstrTest, CanDescribeSelf) {
-  Matcher<std::string> m = HasSubstr("foo\n\"");
-  EXPECT_EQ("has substring \"foo\\n\\\"\"", Describe(m));
-}
-
-TEST(KeyTest, CanDescribeSelf) {
-  Matcher<const pair<std::string, int>&> m = Key("foo");
-  EXPECT_EQ("has a key that is equal to \"foo\"", Describe(m));
-  EXPECT_EQ("doesn't have a key that is equal to \"foo\"", DescribeNegation(m));
-}
-
-TEST(KeyTest, ExplainsResult) {
-  Matcher<pair<int, bool> > m = Key(GreaterThan(10));
-  EXPECT_EQ("whose first field is a value which is 5 less than 10",
-            Explain(m, make_pair(5, true)));
-  EXPECT_EQ("whose first field is a value which is 5 more than 10",
-            Explain(m, make_pair(15, true)));
-}
-
-TEST(KeyTest, MatchesCorrectly) {
-  pair<int, std::string> p(25, "foo");
-  EXPECT_THAT(p, Key(25));
-  EXPECT_THAT(p, Not(Key(42)));
-  EXPECT_THAT(p, Key(Ge(20)));
-  EXPECT_THAT(p, Not(Key(Lt(25))));
-}
-
-TEST(KeyTest, WorksWithMoveOnly) {
-  pair<std::unique_ptr<int>, std::unique_ptr<int>> p;
-  EXPECT_THAT(p, Key(Eq(nullptr)));
-}
-
-template <size_t I>
-struct Tag {};
-
-struct PairWithGet {
-  int member_1;
-  std::string member_2;
-  using first_type = int;
-  using second_type = std::string;
-
-  const int& GetImpl(Tag<0>) const { return member_1; }
-  const std::string& GetImpl(Tag<1>) const { return member_2; }
-};
-template <size_t I>
-auto get(const PairWithGet& value) -> decltype(value.GetImpl(Tag<I>())) {
-  return value.GetImpl(Tag<I>());
-}
-TEST(PairTest, MatchesPairWithGetCorrectly) {
-  PairWithGet p{25, "foo"};
-  EXPECT_THAT(p, Key(25));
-  EXPECT_THAT(p, Not(Key(42)));
-  EXPECT_THAT(p, Key(Ge(20)));
-  EXPECT_THAT(p, Not(Key(Lt(25))));
-
-  std::vector<PairWithGet> v = {{11, "Foo"}, {29, "gMockIsBestMock"}};
-  EXPECT_THAT(v, Contains(Key(29)));
-}
-
-TEST(KeyTest, SafelyCastsInnerMatcher) {
-  Matcher<int> is_positive = Gt(0);
-  Matcher<int> is_negative = Lt(0);
-  pair<char, bool> p('a', true);
-  EXPECT_THAT(p, Key(is_positive));
-  EXPECT_THAT(p, Not(Key(is_negative)));
-}
-
-TEST(KeyTest, InsideContainsUsingMap) {
-  map<int, char> container;
-  container.insert(make_pair(1, 'a'));
-  container.insert(make_pair(2, 'b'));
-  container.insert(make_pair(4, 'c'));
-  EXPECT_THAT(container, Contains(Key(1)));
-  EXPECT_THAT(container, Not(Contains(Key(3))));
-}
-
-TEST(KeyTest, InsideContainsUsingMultimap) {
-  multimap<int, char> container;
-  container.insert(make_pair(1, 'a'));
-  container.insert(make_pair(2, 'b'));
-  container.insert(make_pair(4, 'c'));
-
-  EXPECT_THAT(container, Not(Contains(Key(25))));
-  container.insert(make_pair(25, 'd'));
-  EXPECT_THAT(container, Contains(Key(25)));
-  container.insert(make_pair(25, 'e'));
-  EXPECT_THAT(container, Contains(Key(25)));
-
-  EXPECT_THAT(container, Contains(Key(1)));
-  EXPECT_THAT(container, Not(Contains(Key(3))));
-}
-
-TEST(PairTest, Typing) {
-  // Test verifies the following type conversions can be compiled.
-  Matcher<const pair<const char*, int>&> m1 = Pair("foo", 42);
-  Matcher<const pair<const char*, int> > m2 = Pair("foo", 42);
-  Matcher<pair<const char*, int> > m3 = Pair("foo", 42);
-
-  Matcher<pair<int, const std::string> > m4 = Pair(25, "42");
-  Matcher<pair<const std::string, int> > m5 = Pair("25", 42);
-}
-
-TEST(PairTest, CanDescribeSelf) {
-  Matcher<const pair<std::string, int>&> m1 = Pair("foo", 42);
-  EXPECT_EQ("has a first field that is equal to \"foo\""
-            ", and has a second field that is equal to 42",
-            Describe(m1));
-  EXPECT_EQ("has a first field that isn't equal to \"foo\""
-            ", or has a second field that isn't equal to 42",
-            DescribeNegation(m1));
-  // Double and triple negation (1 or 2 times not and description of negation).
-  Matcher<const pair<int, int>&> m2 = Not(Pair(Not(13), 42));
-  EXPECT_EQ("has a first field that isn't equal to 13"
-            ", and has a second field that is equal to 42",
-            DescribeNegation(m2));
-}
-
-TEST(PairTest, CanExplainMatchResultTo) {
-  // If neither field matches, Pair() should explain about the first
-  // field.
-  const Matcher<pair<int, int> > m = Pair(GreaterThan(0), GreaterThan(0));
-  EXPECT_EQ("whose first field does not match, which is 1 less than 0",
-            Explain(m, make_pair(-1, -2)));
-
-  // If the first field matches but the second doesn't, Pair() should
-  // explain about the second field.
-  EXPECT_EQ("whose second field does not match, which is 2 less than 0",
-            Explain(m, make_pair(1, -2)));
-
-  // If the first field doesn't match but the second does, Pair()
-  // should explain about the first field.
-  EXPECT_EQ("whose first field does not match, which is 1 less than 0",
-            Explain(m, make_pair(-1, 2)));
-
-  // If both fields match, Pair() should explain about them both.
-  EXPECT_EQ("whose both fields match, where the first field is a value "
-            "which is 1 more than 0, and the second field is a value "
-            "which is 2 more than 0",
-            Explain(m, make_pair(1, 2)));
-
-  // If only the first match has an explanation, only this explanation should
-  // be printed.
-  const Matcher<pair<int, int> > explain_first = Pair(GreaterThan(0), 0);
-  EXPECT_EQ("whose both fields match, where the first field is a value "
-            "which is 1 more than 0",
-            Explain(explain_first, make_pair(1, 0)));
-
-  // If only the second match has an explanation, only this explanation should
-  // be printed.
-  const Matcher<pair<int, int> > explain_second = Pair(0, GreaterThan(0));
-  EXPECT_EQ("whose both fields match, where the second field is a value "
-            "which is 1 more than 0",
-            Explain(explain_second, make_pair(0, 1)));
-}
-
-TEST(PairTest, MatchesCorrectly) {
-  pair<int, std::string> p(25, "foo");
-
-  // Both fields match.
-  EXPECT_THAT(p, Pair(25, "foo"));
-  EXPECT_THAT(p, Pair(Ge(20), HasSubstr("o")));
-
-  // 'first' doesnt' match, but 'second' matches.
-  EXPECT_THAT(p, Not(Pair(42, "foo")));
-  EXPECT_THAT(p, Not(Pair(Lt(25), "foo")));
-
-  // 'first' matches, but 'second' doesn't match.
-  EXPECT_THAT(p, Not(Pair(25, "bar")));
-  EXPECT_THAT(p, Not(Pair(25, Not("foo"))));
-
-  // Neither field matches.
-  EXPECT_THAT(p, Not(Pair(13, "bar")));
-  EXPECT_THAT(p, Not(Pair(Lt(13), HasSubstr("a"))));
-}
-
-TEST(PairTest, WorksWithMoveOnly) {
-  pair<std::unique_ptr<int>, std::unique_ptr<int>> p;
-  p.second.reset(new int(7));
-  EXPECT_THAT(p, Pair(Eq(nullptr), Ne(nullptr)));
-}
-
-TEST(PairTest, SafelyCastsInnerMatchers) {
-  Matcher<int> is_positive = Gt(0);
-  Matcher<int> is_negative = Lt(0);
-  pair<char, bool> p('a', true);
-  EXPECT_THAT(p, Pair(is_positive, _));
-  EXPECT_THAT(p, Not(Pair(is_negative, _)));
-  EXPECT_THAT(p, Pair(_, is_positive));
-  EXPECT_THAT(p, Not(Pair(_, is_negative)));
-}
-
-TEST(PairTest, InsideContainsUsingMap) {
-  map<int, char> container;
-  container.insert(make_pair(1, 'a'));
-  container.insert(make_pair(2, 'b'));
-  container.insert(make_pair(4, 'c'));
-  EXPECT_THAT(container, Contains(Pair(1, 'a')));
-  EXPECT_THAT(container, Contains(Pair(1, _)));
-  EXPECT_THAT(container, Contains(Pair(_, 'a')));
-  EXPECT_THAT(container, Not(Contains(Pair(3, _))));
-}
-
-TEST(FieldsAreTest, MatchesCorrectly) {
-  std::tuple<int, std::string, double> p(25, "foo", .5);
-
-  // All fields match.
-  EXPECT_THAT(p, FieldsAre(25, "foo", .5));
-  EXPECT_THAT(p, FieldsAre(Ge(20), HasSubstr("o"), DoubleEq(.5)));
-
-  // Some don't match.
-  EXPECT_THAT(p, Not(FieldsAre(26, "foo", .5)));
-  EXPECT_THAT(p, Not(FieldsAre(25, "fo", .5)));
-  EXPECT_THAT(p, Not(FieldsAre(25, "foo", .6)));
-}
-
-TEST(FieldsAreTest, CanDescribeSelf) {
-  Matcher<const pair<std::string, int>&> m1 = FieldsAre("foo", 42);
-  EXPECT_EQ(
-      "has field #0 that is equal to \"foo\""
-      ", and has field #1 that is equal to 42",
-      Describe(m1));
-  EXPECT_EQ(
-      "has field #0 that isn't equal to \"foo\""
-      ", or has field #1 that isn't equal to 42",
-      DescribeNegation(m1));
-}
-
-TEST(FieldsAreTest, CanExplainMatchResultTo) {
-  // The first one that fails is the one that gives the error.
-  Matcher<std::tuple<int, int, int>> m =
-      FieldsAre(GreaterThan(0), GreaterThan(0), GreaterThan(0));
-
-  EXPECT_EQ("whose field #0 does not match, which is 1 less than 0",
-            Explain(m, std::make_tuple(-1, -2, -3)));
-  EXPECT_EQ("whose field #1 does not match, which is 2 less than 0",
-            Explain(m, std::make_tuple(1, -2, -3)));
-  EXPECT_EQ("whose field #2 does not match, which is 3 less than 0",
-            Explain(m, std::make_tuple(1, 2, -3)));
-
-  // If they all match, we get a long explanation of success.
-  EXPECT_EQ(
-      "whose all elements match, "
-      "where field #0 is a value which is 1 more than 0"
-      ", and field #1 is a value which is 2 more than 0"
-      ", and field #2 is a value which is 3 more than 0",
-      Explain(m, std::make_tuple(1, 2, 3)));
-
-  // Only print those that have an explanation.
-  m = FieldsAre(GreaterThan(0), 0, GreaterThan(0));
-  EXPECT_EQ(
-      "whose all elements match, "
-      "where field #0 is a value which is 1 more than 0"
-      ", and field #2 is a value which is 3 more than 0",
-      Explain(m, std::make_tuple(1, 0, 3)));
-
-  // If only one has an explanation, then print that one.
-  m = FieldsAre(0, GreaterThan(0), 0);
-  EXPECT_EQ(
-      "whose all elements match, "
-      "where field #1 is a value which is 1 more than 0",
-      Explain(m, std::make_tuple(0, 1, 0)));
-}
-
-#if defined(__cpp_structured_bindings) && __cpp_structured_bindings >= 201606
-TEST(FieldsAreTest, StructuredBindings) {
-  // testing::FieldsAre can also match aggregates and such with C++17 and up.
-  struct MyType {
-    int i;
-    std::string str;
-  };
-  EXPECT_THAT((MyType{17, "foo"}), FieldsAre(Eq(17), HasSubstr("oo")));
-
-  // Test all the supported arities.
-  struct MyVarType1 {
-    int a;
-  };
-  EXPECT_THAT(MyVarType1{}, FieldsAre(0));
-  struct MyVarType2 {
-    int a, b;
-  };
-  EXPECT_THAT(MyVarType2{}, FieldsAre(0, 0));
-  struct MyVarType3 {
-    int a, b, c;
-  };
-  EXPECT_THAT(MyVarType3{}, FieldsAre(0, 0, 0));
-  struct MyVarType4 {
-    int a, b, c, d;
-  };
-  EXPECT_THAT(MyVarType4{}, FieldsAre(0, 0, 0, 0));
-  struct MyVarType5 {
-    int a, b, c, d, e;
-  };
-  EXPECT_THAT(MyVarType5{}, FieldsAre(0, 0, 0, 0, 0));
-  struct MyVarType6 {
-    int a, b, c, d, e, f;
-  };
-  EXPECT_THAT(MyVarType6{}, FieldsAre(0, 0, 0, 0, 0, 0));
-  struct MyVarType7 {
-    int a, b, c, d, e, f, g;
-  };
-  EXPECT_THAT(MyVarType7{}, FieldsAre(0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType8 {
-    int a, b, c, d, e, f, g, h;
-  };
-  EXPECT_THAT(MyVarType8{}, FieldsAre(0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType9 {
-    int a, b, c, d, e, f, g, h, i;
-  };
-  EXPECT_THAT(MyVarType9{}, FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType10 {
-    int a, b, c, d, e, f, g, h, i, j;
-  };
-  EXPECT_THAT(MyVarType10{}, FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType11 {
-    int a, b, c, d, e, f, g, h, i, j, k;
-  };
-  EXPECT_THAT(MyVarType11{}, FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType12 {
-    int a, b, c, d, e, f, g, h, i, j, k, l;
-  };
-  EXPECT_THAT(MyVarType12{}, FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType13 {
-    int a, b, c, d, e, f, g, h, i, j, k, l, m;
-  };
-  EXPECT_THAT(MyVarType13{}, FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType14 {
-    int a, b, c, d, e, f, g, h, i, j, k, l, m, n;
-  };
-  EXPECT_THAT(MyVarType14{},
-              FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType15 {
-    int a, b, c, d, e, f, g, h, i, j, k, l, m, n, o;
-  };
-  EXPECT_THAT(MyVarType15{},
-              FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-  struct MyVarType16 {
-    int a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p;
-  };
-  EXPECT_THAT(MyVarType16{},
-              FieldsAre(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0));
-}
-#endif
-
-TEST(ContainsTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(Contains(Pointee(2))));
-  helper.Call(MakeUniquePtrs({1, 2}));
-}
-
-TEST(PairTest, UseGetInsteadOfMembers) {
-  PairWithGet pair{7, "ABC"};
-  EXPECT_THAT(pair, Pair(7, "ABC"));
-  EXPECT_THAT(pair, Pair(Ge(7), HasSubstr("AB")));
-  EXPECT_THAT(pair, Not(Pair(Lt(7), "ABC")));
-
-  std::vector<PairWithGet> v = {{11, "Foo"}, {29, "gMockIsBestMock"}};
-  EXPECT_THAT(v,
-              ElementsAre(Pair(11, std::string("Foo")), Pair(Ge(10), Not(""))));
-}
-
-// Tests StartsWith(s).
-
-TEST(StartsWithTest, MatchesStringWithGivenPrefix) {
-  const Matcher<const char*> m1 = StartsWith(std::string(""));
-  EXPECT_TRUE(m1.Matches("Hi"));
-  EXPECT_TRUE(m1.Matches(""));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const std::string&> m2 = StartsWith("Hi");
-  EXPECT_TRUE(m2.Matches("Hi"));
-  EXPECT_TRUE(m2.Matches("Hi Hi!"));
-  EXPECT_TRUE(m2.Matches("High"));
-  EXPECT_FALSE(m2.Matches("H"));
-  EXPECT_FALSE(m2.Matches(" Hi"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  const Matcher<internal::StringView> m_empty =
-      StartsWith(internal::StringView(""));
-  EXPECT_TRUE(m_empty.Matches(internal::StringView()));
-  EXPECT_TRUE(m_empty.Matches(internal::StringView("")));
-  EXPECT_TRUE(m_empty.Matches(internal::StringView("not empty")));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(StartsWithTest, CanDescribeSelf) {
-  Matcher<const std::string> m = StartsWith("Hi");
-  EXPECT_EQ("starts with \"Hi\"", Describe(m));
-}
-
-// Tests EndsWith(s).
-
-TEST(EndsWithTest, MatchesStringWithGivenSuffix) {
-  const Matcher<const char*> m1 = EndsWith("");
-  EXPECT_TRUE(m1.Matches("Hi"));
-  EXPECT_TRUE(m1.Matches(""));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const std::string&> m2 = EndsWith(std::string("Hi"));
-  EXPECT_TRUE(m2.Matches("Hi"));
-  EXPECT_TRUE(m2.Matches("Wow Hi Hi"));
-  EXPECT_TRUE(m2.Matches("Super Hi"));
-  EXPECT_FALSE(m2.Matches("i"));
-  EXPECT_FALSE(m2.Matches("Hi "));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  const Matcher<const internal::StringView&> m4 =
-      EndsWith(internal::StringView(""));
-  EXPECT_TRUE(m4.Matches("Hi"));
-  EXPECT_TRUE(m4.Matches(""));
-  EXPECT_TRUE(m4.Matches(internal::StringView()));
-  EXPECT_TRUE(m4.Matches(internal::StringView("")));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(EndsWithTest, CanDescribeSelf) {
-  Matcher<const std::string> m = EndsWith("Hi");
-  EXPECT_EQ("ends with \"Hi\"", Describe(m));
-}
-
-// Tests MatchesRegex().
-
-TEST(MatchesRegexTest, MatchesStringMatchingGivenRegex) {
-  const Matcher<const char*> m1 = MatchesRegex("a.*z");
-  EXPECT_TRUE(m1.Matches("az"));
-  EXPECT_TRUE(m1.Matches("abcz"));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const std::string&> m2 = MatchesRegex(new RE("a.*z"));
-  EXPECT_TRUE(m2.Matches("azbz"));
-  EXPECT_FALSE(m2.Matches("az1"));
-  EXPECT_FALSE(m2.Matches("1az"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  const Matcher<const internal::StringView&> m3 = MatchesRegex("a.*z");
-  EXPECT_TRUE(m3.Matches(internal::StringView("az")));
-  EXPECT_TRUE(m3.Matches(internal::StringView("abcz")));
-  EXPECT_FALSE(m3.Matches(internal::StringView("1az")));
-  EXPECT_FALSE(m3.Matches(internal::StringView()));
-  const Matcher<const internal::StringView&> m4 =
-      MatchesRegex(internal::StringView(""));
-  EXPECT_TRUE(m4.Matches(internal::StringView("")));
-  EXPECT_TRUE(m4.Matches(internal::StringView()));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(MatchesRegexTest, CanDescribeSelf) {
-  Matcher<const std::string> m1 = MatchesRegex(std::string("Hi.*"));
-  EXPECT_EQ("matches regular expression \"Hi.*\"", Describe(m1));
-
-  Matcher<const char*> m2 = MatchesRegex(new RE("a.*"));
-  EXPECT_EQ("matches regular expression \"a.*\"", Describe(m2));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  Matcher<const internal::StringView> m3 = MatchesRegex(new RE("0.*"));
-  EXPECT_EQ("matches regular expression \"0.*\"", Describe(m3));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-// Tests ContainsRegex().
-
-TEST(ContainsRegexTest, MatchesStringContainingGivenRegex) {
-  const Matcher<const char*> m1 = ContainsRegex(std::string("a.*z"));
-  EXPECT_TRUE(m1.Matches("az"));
-  EXPECT_TRUE(m1.Matches("0abcz1"));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const std::string&> m2 = ContainsRegex(new RE("a.*z"));
-  EXPECT_TRUE(m2.Matches("azbz"));
-  EXPECT_TRUE(m2.Matches("az1"));
-  EXPECT_FALSE(m2.Matches("1a"));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  const Matcher<const internal::StringView&> m3 =
-      ContainsRegex(new RE("a.*z"));
-  EXPECT_TRUE(m3.Matches(internal::StringView("azbz")));
-  EXPECT_TRUE(m3.Matches(internal::StringView("az1")));
-  EXPECT_FALSE(m3.Matches(internal::StringView("1a")));
-  EXPECT_FALSE(m3.Matches(internal::StringView()));
-  const Matcher<const internal::StringView&> m4 =
-      ContainsRegex(internal::StringView(""));
-  EXPECT_TRUE(m4.Matches(internal::StringView("")));
-  EXPECT_TRUE(m4.Matches(internal::StringView()));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-TEST(ContainsRegexTest, CanDescribeSelf) {
-  Matcher<const std::string> m1 = ContainsRegex("Hi.*");
-  EXPECT_EQ("contains regular expression \"Hi.*\"", Describe(m1));
-
-  Matcher<const char*> m2 = ContainsRegex(new RE("a.*"));
-  EXPECT_EQ("contains regular expression \"a.*\"", Describe(m2));
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  Matcher<const internal::StringView> m3 = ContainsRegex(new RE("0.*"));
-  EXPECT_EQ("contains regular expression \"0.*\"", Describe(m3));
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-}
-
-// Tests for wide strings.
-#if GTEST_HAS_STD_WSTRING
-TEST(StdWideStrEqTest, MatchesEqual) {
-  Matcher<const wchar_t*> m = StrEq(::std::wstring(L"Hello"));
-  EXPECT_TRUE(m.Matches(L"Hello"));
-  EXPECT_FALSE(m.Matches(L"hello"));
-  EXPECT_FALSE(m.Matches(nullptr));
-
-  Matcher<const ::std::wstring&> m2 = StrEq(L"Hello");
-  EXPECT_TRUE(m2.Matches(L"Hello"));
-  EXPECT_FALSE(m2.Matches(L"Hi"));
-
-  Matcher<const ::std::wstring&> m3 = StrEq(L"\xD3\x576\x8D3\xC74D");
-  EXPECT_TRUE(m3.Matches(L"\xD3\x576\x8D3\xC74D"));
-  EXPECT_FALSE(m3.Matches(L"\xD3\x576\x8D3\xC74E"));
-
-  ::std::wstring str(L"01204500800");
-  str[3] = L'\0';
-  Matcher<const ::std::wstring&> m4 = StrEq(str);
-  EXPECT_TRUE(m4.Matches(str));
-  str[0] = str[6] = str[7] = str[9] = str[10] = L'\0';
-  Matcher<const ::std::wstring&> m5 = StrEq(str);
-  EXPECT_TRUE(m5.Matches(str));
-}
-
-TEST(StdWideStrEqTest, CanDescribeSelf) {
-  Matcher< ::std::wstring> m = StrEq(L"Hi-\'\"?\\\a\b\f\n\r\t\v");
-  EXPECT_EQ("is equal to L\"Hi-\'\\\"?\\\\\\a\\b\\f\\n\\r\\t\\v\"",
-    Describe(m));
-
-  Matcher< ::std::wstring> m2 = StrEq(L"\xD3\x576\x8D3\xC74D");
-  EXPECT_EQ("is equal to L\"\\xD3\\x576\\x8D3\\xC74D\"",
-    Describe(m2));
-
-  ::std::wstring str(L"01204500800");
-  str[3] = L'\0';
-  Matcher<const ::std::wstring&> m4 = StrEq(str);
-  EXPECT_EQ("is equal to L\"012\\04500800\"", Describe(m4));
-  str[0] = str[6] = str[7] = str[9] = str[10] = L'\0';
-  Matcher<const ::std::wstring&> m5 = StrEq(str);
-  EXPECT_EQ("is equal to L\"\\012\\045\\0\\08\\0\\0\"", Describe(m5));
-}
-
-TEST(StdWideStrNeTest, MatchesUnequalString) {
-  Matcher<const wchar_t*> m = StrNe(L"Hello");
-  EXPECT_TRUE(m.Matches(L""));
-  EXPECT_TRUE(m.Matches(nullptr));
-  EXPECT_FALSE(m.Matches(L"Hello"));
-
-  Matcher< ::std::wstring> m2 = StrNe(::std::wstring(L"Hello"));
-  EXPECT_TRUE(m2.Matches(L"hello"));
-  EXPECT_FALSE(m2.Matches(L"Hello"));
-}
-
-TEST(StdWideStrNeTest, CanDescribeSelf) {
-  Matcher<const wchar_t*> m = StrNe(L"Hi");
-  EXPECT_EQ("isn't equal to L\"Hi\"", Describe(m));
-}
-
-TEST(StdWideStrCaseEqTest, MatchesEqualStringIgnoringCase) {
-  Matcher<const wchar_t*> m = StrCaseEq(::std::wstring(L"Hello"));
-  EXPECT_TRUE(m.Matches(L"Hello"));
-  EXPECT_TRUE(m.Matches(L"hello"));
-  EXPECT_FALSE(m.Matches(L"Hi"));
-  EXPECT_FALSE(m.Matches(nullptr));
-
-  Matcher<const ::std::wstring&> m2 = StrCaseEq(L"Hello");
-  EXPECT_TRUE(m2.Matches(L"hello"));
-  EXPECT_FALSE(m2.Matches(L"Hi"));
-}
-
-TEST(StdWideStrCaseEqTest, MatchesEqualStringWith0IgnoringCase) {
-  ::std::wstring str1(L"oabocdooeoo");
-  ::std::wstring str2(L"OABOCDOOEOO");
-  Matcher<const ::std::wstring&> m0 = StrCaseEq(str1);
-  EXPECT_FALSE(m0.Matches(str2 + ::std::wstring(1, L'\0')));
-
-  str1[3] = str2[3] = L'\0';
-  Matcher<const ::std::wstring&> m1 = StrCaseEq(str1);
-  EXPECT_TRUE(m1.Matches(str2));
-
-  str1[0] = str1[6] = str1[7] = str1[10] = L'\0';
-  str2[0] = str2[6] = str2[7] = str2[10] = L'\0';
-  Matcher<const ::std::wstring&> m2 = StrCaseEq(str1);
-  str1[9] = str2[9] = L'\0';
-  EXPECT_FALSE(m2.Matches(str2));
-
-  Matcher<const ::std::wstring&> m3 = StrCaseEq(str1);
-  EXPECT_TRUE(m3.Matches(str2));
-
-  EXPECT_FALSE(m3.Matches(str2 + L"x"));
-  str2.append(1, L'\0');
-  EXPECT_FALSE(m3.Matches(str2));
-  EXPECT_FALSE(m3.Matches(::std::wstring(str2, 0, 9)));
-}
-
-TEST(StdWideStrCaseEqTest, CanDescribeSelf) {
-  Matcher< ::std::wstring> m = StrCaseEq(L"Hi");
-  EXPECT_EQ("is equal to (ignoring case) L\"Hi\"", Describe(m));
-}
-
-TEST(StdWideStrCaseNeTest, MatchesUnequalStringIgnoringCase) {
-  Matcher<const wchar_t*> m = StrCaseNe(L"Hello");
-  EXPECT_TRUE(m.Matches(L"Hi"));
-  EXPECT_TRUE(m.Matches(nullptr));
-  EXPECT_FALSE(m.Matches(L"Hello"));
-  EXPECT_FALSE(m.Matches(L"hello"));
-
-  Matcher< ::std::wstring> m2 = StrCaseNe(::std::wstring(L"Hello"));
-  EXPECT_TRUE(m2.Matches(L""));
-  EXPECT_FALSE(m2.Matches(L"Hello"));
-}
-
-TEST(StdWideStrCaseNeTest, CanDescribeSelf) {
-  Matcher<const wchar_t*> m = StrCaseNe(L"Hi");
-  EXPECT_EQ("isn't equal to (ignoring case) L\"Hi\"", Describe(m));
-}
-
-// Tests that HasSubstr() works for matching wstring-typed values.
-TEST(StdWideHasSubstrTest, WorksForStringClasses) {
-  const Matcher< ::std::wstring> m1 = HasSubstr(L"foo");
-  EXPECT_TRUE(m1.Matches(::std::wstring(L"I love food.")));
-  EXPECT_FALSE(m1.Matches(::std::wstring(L"tofo")));
-
-  const Matcher<const ::std::wstring&> m2 = HasSubstr(L"foo");
-  EXPECT_TRUE(m2.Matches(::std::wstring(L"I love food.")));
-  EXPECT_FALSE(m2.Matches(::std::wstring(L"tofo")));
-}
-
-// Tests that HasSubstr() works for matching C-wide-string-typed values.
-TEST(StdWideHasSubstrTest, WorksForCStrings) {
-  const Matcher<wchar_t*> m1 = HasSubstr(L"foo");
-  EXPECT_TRUE(m1.Matches(const_cast<wchar_t*>(L"I love food.")));
-  EXPECT_FALSE(m1.Matches(const_cast<wchar_t*>(L"tofo")));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const wchar_t*> m2 = HasSubstr(L"foo");
-  EXPECT_TRUE(m2.Matches(L"I love food."));
-  EXPECT_FALSE(m2.Matches(L"tofo"));
-  EXPECT_FALSE(m2.Matches(nullptr));
-}
-
-// Tests that HasSubstr(s) describes itself properly.
-TEST(StdWideHasSubstrTest, CanDescribeSelf) {
-  Matcher< ::std::wstring> m = HasSubstr(L"foo\n\"");
-  EXPECT_EQ("has substring L\"foo\\n\\\"\"", Describe(m));
-}
-
-// Tests StartsWith(s).
-
-TEST(StdWideStartsWithTest, MatchesStringWithGivenPrefix) {
-  const Matcher<const wchar_t*> m1 = StartsWith(::std::wstring(L""));
-  EXPECT_TRUE(m1.Matches(L"Hi"));
-  EXPECT_TRUE(m1.Matches(L""));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const ::std::wstring&> m2 = StartsWith(L"Hi");
-  EXPECT_TRUE(m2.Matches(L"Hi"));
-  EXPECT_TRUE(m2.Matches(L"Hi Hi!"));
-  EXPECT_TRUE(m2.Matches(L"High"));
-  EXPECT_FALSE(m2.Matches(L"H"));
-  EXPECT_FALSE(m2.Matches(L" Hi"));
-}
-
-TEST(StdWideStartsWithTest, CanDescribeSelf) {
-  Matcher<const ::std::wstring> m = StartsWith(L"Hi");
-  EXPECT_EQ("starts with L\"Hi\"", Describe(m));
-}
-
-// Tests EndsWith(s).
-
-TEST(StdWideEndsWithTest, MatchesStringWithGivenSuffix) {
-  const Matcher<const wchar_t*> m1 = EndsWith(L"");
-  EXPECT_TRUE(m1.Matches(L"Hi"));
-  EXPECT_TRUE(m1.Matches(L""));
-  EXPECT_FALSE(m1.Matches(nullptr));
-
-  const Matcher<const ::std::wstring&> m2 = EndsWith(::std::wstring(L"Hi"));
-  EXPECT_TRUE(m2.Matches(L"Hi"));
-  EXPECT_TRUE(m2.Matches(L"Wow Hi Hi"));
-  EXPECT_TRUE(m2.Matches(L"Super Hi"));
-  EXPECT_FALSE(m2.Matches(L"i"));
-  EXPECT_FALSE(m2.Matches(L"Hi "));
-}
-
-TEST(StdWideEndsWithTest, CanDescribeSelf) {
-  Matcher<const ::std::wstring> m = EndsWith(L"Hi");
-  EXPECT_EQ("ends with L\"Hi\"", Describe(m));
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-typedef ::std::tuple<long, int> Tuple2;  // NOLINT
-
-// Tests that Eq() matches a 2-tuple where the first field == the
-// second field.
-TEST(Eq2Test, MatchesEqualArguments) {
-  Matcher<const Tuple2&> m = Eq();
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 5)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 6)));
-}
-
-// Tests that Eq() describes itself properly.
-TEST(Eq2Test, CanDescribeSelf) {
-  Matcher<const Tuple2&> m = Eq();
-  EXPECT_EQ("are an equal pair", Describe(m));
-}
-
-// Tests that Ge() matches a 2-tuple where the first field >= the
-// second field.
-TEST(Ge2Test, MatchesGreaterThanOrEqualArguments) {
-  Matcher<const Tuple2&> m = Ge();
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 4)));
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 5)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 6)));
-}
-
-// Tests that Ge() describes itself properly.
-TEST(Ge2Test, CanDescribeSelf) {
-  Matcher<const Tuple2&> m = Ge();
-  EXPECT_EQ("are a pair where the first >= the second", Describe(m));
-}
-
-// Tests that Gt() matches a 2-tuple where the first field > the
-// second field.
-TEST(Gt2Test, MatchesGreaterThanArguments) {
-  Matcher<const Tuple2&> m = Gt();
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 4)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 5)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 6)));
-}
-
-// Tests that Gt() describes itself properly.
-TEST(Gt2Test, CanDescribeSelf) {
-  Matcher<const Tuple2&> m = Gt();
-  EXPECT_EQ("are a pair where the first > the second", Describe(m));
-}
-
-// Tests that Le() matches a 2-tuple where the first field <= the
-// second field.
-TEST(Le2Test, MatchesLessThanOrEqualArguments) {
-  Matcher<const Tuple2&> m = Le();
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 6)));
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 5)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 4)));
-}
-
-// Tests that Le() describes itself properly.
-TEST(Le2Test, CanDescribeSelf) {
-  Matcher<const Tuple2&> m = Le();
-  EXPECT_EQ("are a pair where the first <= the second", Describe(m));
-}
-
-// Tests that Lt() matches a 2-tuple where the first field < the
-// second field.
-TEST(Lt2Test, MatchesLessThanArguments) {
-  Matcher<const Tuple2&> m = Lt();
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 6)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 5)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 4)));
-}
-
-// Tests that Lt() describes itself properly.
-TEST(Lt2Test, CanDescribeSelf) {
-  Matcher<const Tuple2&> m = Lt();
-  EXPECT_EQ("are a pair where the first < the second", Describe(m));
-}
-
-// Tests that Ne() matches a 2-tuple where the first field != the
-// second field.
-TEST(Ne2Test, MatchesUnequalArguments) {
-  Matcher<const Tuple2&> m = Ne();
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 6)));
-  EXPECT_TRUE(m.Matches(Tuple2(5L, 4)));
-  EXPECT_FALSE(m.Matches(Tuple2(5L, 5)));
-}
-
-// Tests that Ne() describes itself properly.
-TEST(Ne2Test, CanDescribeSelf) {
-  Matcher<const Tuple2&> m = Ne();
-  EXPECT_EQ("are an unequal pair", Describe(m));
-}
-
-TEST(PairMatchBaseTest, WorksWithMoveOnly) {
-  using Pointers = std::tuple<std::unique_ptr<int>, std::unique_ptr<int>>;
-  Matcher<Pointers> matcher = Eq();
-  Pointers pointers;
-  // Tested values don't matter; the point is that matcher does not copy the
-  // matched values.
-  EXPECT_TRUE(matcher.Matches(pointers));
-}
-
-// Tests that IsNan() matches a NaN, with float.
-TEST(IsNan, FloatMatchesNan) {
-  float quiet_nan = std::numeric_limits<float>::quiet_NaN();
-  float other_nan = std::nanf("1");
-  float real_value = 1.0f;
-
-  Matcher<float> m = IsNan();
-  EXPECT_TRUE(m.Matches(quiet_nan));
-  EXPECT_TRUE(m.Matches(other_nan));
-  EXPECT_FALSE(m.Matches(real_value));
-
-  Matcher<float&> m_ref = IsNan();
-  EXPECT_TRUE(m_ref.Matches(quiet_nan));
-  EXPECT_TRUE(m_ref.Matches(other_nan));
-  EXPECT_FALSE(m_ref.Matches(real_value));
-
-  Matcher<const float&> m_cref = IsNan();
-  EXPECT_TRUE(m_cref.Matches(quiet_nan));
-  EXPECT_TRUE(m_cref.Matches(other_nan));
-  EXPECT_FALSE(m_cref.Matches(real_value));
-}
-
-// Tests that IsNan() matches a NaN, with double.
-TEST(IsNan, DoubleMatchesNan) {
-  double quiet_nan = std::numeric_limits<double>::quiet_NaN();
-  double other_nan = std::nan("1");
-  double real_value = 1.0;
-
-  Matcher<double> m = IsNan();
-  EXPECT_TRUE(m.Matches(quiet_nan));
-  EXPECT_TRUE(m.Matches(other_nan));
-  EXPECT_FALSE(m.Matches(real_value));
-
-  Matcher<double&> m_ref = IsNan();
-  EXPECT_TRUE(m_ref.Matches(quiet_nan));
-  EXPECT_TRUE(m_ref.Matches(other_nan));
-  EXPECT_FALSE(m_ref.Matches(real_value));
-
-  Matcher<const double&> m_cref = IsNan();
-  EXPECT_TRUE(m_cref.Matches(quiet_nan));
-  EXPECT_TRUE(m_cref.Matches(other_nan));
-  EXPECT_FALSE(m_cref.Matches(real_value));
-}
-
-// Tests that IsNan() matches a NaN, with long double.
-TEST(IsNan, LongDoubleMatchesNan) {
-  long double quiet_nan = std::numeric_limits<long double>::quiet_NaN();
-  long double other_nan = std::nan("1");
-  long double real_value = 1.0;
-
-  Matcher<long double> m = IsNan();
-  EXPECT_TRUE(m.Matches(quiet_nan));
-  EXPECT_TRUE(m.Matches(other_nan));
-  EXPECT_FALSE(m.Matches(real_value));
-
-  Matcher<long double&> m_ref = IsNan();
-  EXPECT_TRUE(m_ref.Matches(quiet_nan));
-  EXPECT_TRUE(m_ref.Matches(other_nan));
-  EXPECT_FALSE(m_ref.Matches(real_value));
-
-  Matcher<const long double&> m_cref = IsNan();
-  EXPECT_TRUE(m_cref.Matches(quiet_nan));
-  EXPECT_TRUE(m_cref.Matches(other_nan));
-  EXPECT_FALSE(m_cref.Matches(real_value));
-}
-
-// Tests that IsNan() works with Not.
-TEST(IsNan, NotMatchesNan) {
-  Matcher<float> mf = Not(IsNan());
-  EXPECT_FALSE(mf.Matches(std::numeric_limits<float>::quiet_NaN()));
-  EXPECT_FALSE(mf.Matches(std::nanf("1")));
-  EXPECT_TRUE(mf.Matches(1.0));
-
-  Matcher<double> md = Not(IsNan());
-  EXPECT_FALSE(md.Matches(std::numeric_limits<double>::quiet_NaN()));
-  EXPECT_FALSE(md.Matches(std::nan("1")));
-  EXPECT_TRUE(md.Matches(1.0));
-
-  Matcher<long double> mld = Not(IsNan());
-  EXPECT_FALSE(mld.Matches(std::numeric_limits<long double>::quiet_NaN()));
-  EXPECT_FALSE(mld.Matches(std::nanl("1")));
-  EXPECT_TRUE(mld.Matches(1.0));
-}
-
-// Tests that IsNan() can describe itself.
-TEST(IsNan, CanDescribeSelf) {
-  Matcher<float> mf = IsNan();
-  EXPECT_EQ("is NaN", Describe(mf));
-
-  Matcher<double> md = IsNan();
-  EXPECT_EQ("is NaN", Describe(md));
-
-  Matcher<long double> mld = IsNan();
-  EXPECT_EQ("is NaN", Describe(mld));
-}
-
-// Tests that IsNan() can describe itself with Not.
-TEST(IsNan, CanDescribeSelfWithNot) {
-  Matcher<float> mf = Not(IsNan());
-  EXPECT_EQ("isn't NaN", Describe(mf));
-
-  Matcher<double> md = Not(IsNan());
-  EXPECT_EQ("isn't NaN", Describe(md));
-
-  Matcher<long double> mld = Not(IsNan());
-  EXPECT_EQ("isn't NaN", Describe(mld));
-}
-
-// Tests that FloatEq() matches a 2-tuple where
-// FloatEq(first field) matches the second field.
-TEST(FloatEq2Test, MatchesEqualArguments) {
-  typedef ::std::tuple<float, float> Tpl;
-  Matcher<const Tpl&> m = FloatEq();
-  EXPECT_TRUE(m.Matches(Tpl(1.0f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(0.3f, 0.1f + 0.1f + 0.1f)));
-  EXPECT_FALSE(m.Matches(Tpl(1.1f, 1.0f)));
-}
-
-// Tests that FloatEq() describes itself properly.
-TEST(FloatEq2Test, CanDescribeSelf) {
-  Matcher<const ::std::tuple<float, float>&> m = FloatEq();
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that NanSensitiveFloatEq() matches a 2-tuple where
-// NanSensitiveFloatEq(first field) matches the second field.
-TEST(NanSensitiveFloatEqTest, MatchesEqualArgumentsWithNaN) {
-  typedef ::std::tuple<float, float> Tpl;
-  Matcher<const Tpl&> m = NanSensitiveFloatEq();
-  EXPECT_TRUE(m.Matches(Tpl(1.0f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(std::numeric_limits<float>::quiet_NaN(),
-                            std::numeric_limits<float>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(1.1f, 1.0f)));
-  EXPECT_FALSE(m.Matches(Tpl(1.0f, std::numeric_limits<float>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(std::numeric_limits<float>::quiet_NaN(), 1.0f)));
-}
-
-// Tests that NanSensitiveFloatEq() describes itself properly.
-TEST(NanSensitiveFloatEqTest, CanDescribeSelfWithNaNs) {
-  Matcher<const ::std::tuple<float, float>&> m = NanSensitiveFloatEq();
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that DoubleEq() matches a 2-tuple where
-// DoubleEq(first field) matches the second field.
-TEST(DoubleEq2Test, MatchesEqualArguments) {
-  typedef ::std::tuple<double, double> Tpl;
-  Matcher<const Tpl&> m = DoubleEq();
-  EXPECT_TRUE(m.Matches(Tpl(1.0, 1.0)));
-  EXPECT_TRUE(m.Matches(Tpl(0.3, 0.1 + 0.1 + 0.1)));
-  EXPECT_FALSE(m.Matches(Tpl(1.1, 1.0)));
-}
-
-// Tests that DoubleEq() describes itself properly.
-TEST(DoubleEq2Test, CanDescribeSelf) {
-  Matcher<const ::std::tuple<double, double>&> m = DoubleEq();
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that NanSensitiveDoubleEq() matches a 2-tuple where
-// NanSensitiveDoubleEq(first field) matches the second field.
-TEST(NanSensitiveDoubleEqTest, MatchesEqualArgumentsWithNaN) {
-  typedef ::std::tuple<double, double> Tpl;
-  Matcher<const Tpl&> m = NanSensitiveDoubleEq();
-  EXPECT_TRUE(m.Matches(Tpl(1.0f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(std::numeric_limits<double>::quiet_NaN(),
-                            std::numeric_limits<double>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(1.1f, 1.0f)));
-  EXPECT_FALSE(m.Matches(Tpl(1.0f, std::numeric_limits<double>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(std::numeric_limits<double>::quiet_NaN(), 1.0f)));
-}
-
-// Tests that DoubleEq() describes itself properly.
-TEST(NanSensitiveDoubleEqTest, CanDescribeSelfWithNaNs) {
-  Matcher<const ::std::tuple<double, double>&> m = NanSensitiveDoubleEq();
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that FloatEq() matches a 2-tuple where
-// FloatNear(first field, max_abs_error) matches the second field.
-TEST(FloatNear2Test, MatchesEqualArguments) {
-  typedef ::std::tuple<float, float> Tpl;
-  Matcher<const Tpl&> m = FloatNear(0.5f);
-  EXPECT_TRUE(m.Matches(Tpl(1.0f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(1.3f, 1.0f)));
-  EXPECT_FALSE(m.Matches(Tpl(1.8f, 1.0f)));
-}
-
-// Tests that FloatNear() describes itself properly.
-TEST(FloatNear2Test, CanDescribeSelf) {
-  Matcher<const ::std::tuple<float, float>&> m = FloatNear(0.5f);
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that NanSensitiveFloatNear() matches a 2-tuple where
-// NanSensitiveFloatNear(first field) matches the second field.
-TEST(NanSensitiveFloatNearTest, MatchesNearbyArgumentsWithNaN) {
-  typedef ::std::tuple<float, float> Tpl;
-  Matcher<const Tpl&> m = NanSensitiveFloatNear(0.5f);
-  EXPECT_TRUE(m.Matches(Tpl(1.0f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(1.1f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(std::numeric_limits<float>::quiet_NaN(),
-                            std::numeric_limits<float>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(1.6f, 1.0f)));
-  EXPECT_FALSE(m.Matches(Tpl(1.0f, std::numeric_limits<float>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(std::numeric_limits<float>::quiet_NaN(), 1.0f)));
-}
-
-// Tests that NanSensitiveFloatNear() describes itself properly.
-TEST(NanSensitiveFloatNearTest, CanDescribeSelfWithNaNs) {
-  Matcher<const ::std::tuple<float, float>&> m = NanSensitiveFloatNear(0.5f);
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that FloatEq() matches a 2-tuple where
-// DoubleNear(first field, max_abs_error) matches the second field.
-TEST(DoubleNear2Test, MatchesEqualArguments) {
-  typedef ::std::tuple<double, double> Tpl;
-  Matcher<const Tpl&> m = DoubleNear(0.5);
-  EXPECT_TRUE(m.Matches(Tpl(1.0, 1.0)));
-  EXPECT_TRUE(m.Matches(Tpl(1.3, 1.0)));
-  EXPECT_FALSE(m.Matches(Tpl(1.8, 1.0)));
-}
-
-// Tests that DoubleNear() describes itself properly.
-TEST(DoubleNear2Test, CanDescribeSelf) {
-  Matcher<const ::std::tuple<double, double>&> m = DoubleNear(0.5);
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that NanSensitiveDoubleNear() matches a 2-tuple where
-// NanSensitiveDoubleNear(first field) matches the second field.
-TEST(NanSensitiveDoubleNearTest, MatchesNearbyArgumentsWithNaN) {
-  typedef ::std::tuple<double, double> Tpl;
-  Matcher<const Tpl&> m = NanSensitiveDoubleNear(0.5f);
-  EXPECT_TRUE(m.Matches(Tpl(1.0f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(1.1f, 1.0f)));
-  EXPECT_TRUE(m.Matches(Tpl(std::numeric_limits<double>::quiet_NaN(),
-                            std::numeric_limits<double>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(1.6f, 1.0f)));
-  EXPECT_FALSE(m.Matches(Tpl(1.0f, std::numeric_limits<double>::quiet_NaN())));
-  EXPECT_FALSE(m.Matches(Tpl(std::numeric_limits<double>::quiet_NaN(), 1.0f)));
-}
-
-// Tests that NanSensitiveDoubleNear() describes itself properly.
-TEST(NanSensitiveDoubleNearTest, CanDescribeSelfWithNaNs) {
-  Matcher<const ::std::tuple<double, double>&> m = NanSensitiveDoubleNear(0.5f);
-  EXPECT_EQ("are an almost-equal pair", Describe(m));
-}
-
-// Tests that Not(m) matches any value that doesn't match m.
-TEST(NotTest, NegatesMatcher) {
-  Matcher<int> m;
-  m = Not(Eq(2));
-  EXPECT_TRUE(m.Matches(3));
-  EXPECT_FALSE(m.Matches(2));
-}
-
-// Tests that Not(m) describes itself properly.
-TEST(NotTest, CanDescribeSelf) {
-  Matcher<int> m = Not(Eq(5));
-  EXPECT_EQ("isn't equal to 5", Describe(m));
-}
-
-// Tests that monomorphic matchers are safely cast by the Not matcher.
-TEST(NotTest, NotMatcherSafelyCastsMonomorphicMatchers) {
-  // greater_than_5 is a monomorphic matcher.
-  Matcher<int> greater_than_5 = Gt(5);
-
-  Matcher<const int&> m = Not(greater_than_5);
-  Matcher<int&> m2 = Not(greater_than_5);
-  Matcher<int&> m3 = Not(m);
-}
-
-// Helper to allow easy testing of AllOf matchers with num parameters.
-void AllOfMatches(int num, const Matcher<int>& m) {
-  SCOPED_TRACE(Describe(m));
-  EXPECT_TRUE(m.Matches(0));
-  for (int i = 1; i <= num; ++i) {
-    EXPECT_FALSE(m.Matches(i));
-  }
-  EXPECT_TRUE(m.Matches(num + 1));
-}
-
-// Tests that AllOf(m1, ..., mn) matches any value that matches all of
-// the given matchers.
-TEST(AllOfTest, MatchesWhenAllMatch) {
-  Matcher<int> m;
-  m = AllOf(Le(2), Ge(1));
-  EXPECT_TRUE(m.Matches(1));
-  EXPECT_TRUE(m.Matches(2));
-  EXPECT_FALSE(m.Matches(0));
-  EXPECT_FALSE(m.Matches(3));
-
-  m = AllOf(Gt(0), Ne(1), Ne(2));
-  EXPECT_TRUE(m.Matches(3));
-  EXPECT_FALSE(m.Matches(2));
-  EXPECT_FALSE(m.Matches(1));
-  EXPECT_FALSE(m.Matches(0));
-
-  m = AllOf(Gt(0), Ne(1), Ne(2), Ne(3));
-  EXPECT_TRUE(m.Matches(4));
-  EXPECT_FALSE(m.Matches(3));
-  EXPECT_FALSE(m.Matches(2));
-  EXPECT_FALSE(m.Matches(1));
-  EXPECT_FALSE(m.Matches(0));
-
-  m = AllOf(Ge(0), Lt(10), Ne(3), Ne(5), Ne(7));
-  EXPECT_TRUE(m.Matches(0));
-  EXPECT_TRUE(m.Matches(1));
-  EXPECT_FALSE(m.Matches(3));
-
-  // The following tests for varying number of sub-matchers. Due to the way
-  // the sub-matchers are handled it is enough to test every sub-matcher once
-  // with sub-matchers using the same matcher type. Varying matcher types are
-  // checked for above.
-  AllOfMatches(2, AllOf(Ne(1), Ne(2)));
-  AllOfMatches(3, AllOf(Ne(1), Ne(2), Ne(3)));
-  AllOfMatches(4, AllOf(Ne(1), Ne(2), Ne(3), Ne(4)));
-  AllOfMatches(5, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5)));
-  AllOfMatches(6, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6)));
-  AllOfMatches(7, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6), Ne(7)));
-  AllOfMatches(8, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6), Ne(7),
-                        Ne(8)));
-  AllOfMatches(9, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6), Ne(7),
-                        Ne(8), Ne(9)));
-  AllOfMatches(10, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6), Ne(7), Ne(8),
-                         Ne(9), Ne(10)));
-  AllOfMatches(
-      50, AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6), Ne(7), Ne(8), Ne(9),
-                Ne(10), Ne(11), Ne(12), Ne(13), Ne(14), Ne(15), Ne(16), Ne(17),
-                Ne(18), Ne(19), Ne(20), Ne(21), Ne(22), Ne(23), Ne(24), Ne(25),
-                Ne(26), Ne(27), Ne(28), Ne(29), Ne(30), Ne(31), Ne(32), Ne(33),
-                Ne(34), Ne(35), Ne(36), Ne(37), Ne(38), Ne(39), Ne(40), Ne(41),
-                Ne(42), Ne(43), Ne(44), Ne(45), Ne(46), Ne(47), Ne(48), Ne(49),
-                Ne(50)));
-}
-
-
-// Tests that AllOf(m1, ..., mn) describes itself properly.
-TEST(AllOfTest, CanDescribeSelf) {
-  Matcher<int> m;
-  m = AllOf(Le(2), Ge(1));
-  EXPECT_EQ("(is <= 2) and (is >= 1)", Describe(m));
-
-  m = AllOf(Gt(0), Ne(1), Ne(2));
-  std::string expected_descr1 =
-      "(is > 0) and (isn't equal to 1) and (isn't equal to 2)";
-  EXPECT_EQ(expected_descr1, Describe(m));
-
-  m = AllOf(Gt(0), Ne(1), Ne(2), Ne(3));
-  std::string expected_descr2 =
-      "(is > 0) and (isn't equal to 1) and (isn't equal to 2) and (isn't equal "
-      "to 3)";
-  EXPECT_EQ(expected_descr2, Describe(m));
-
-  m = AllOf(Ge(0), Lt(10), Ne(3), Ne(5), Ne(7));
-  std::string expected_descr3 =
-      "(is >= 0) and (is < 10) and (isn't equal to 3) and (isn't equal to 5) "
-      "and (isn't equal to 7)";
-  EXPECT_EQ(expected_descr3, Describe(m));
-}
-
-// Tests that AllOf(m1, ..., mn) describes its negation properly.
-TEST(AllOfTest, CanDescribeNegation) {
-  Matcher<int> m;
-  m = AllOf(Le(2), Ge(1));
-  std::string expected_descr4 = "(isn't <= 2) or (isn't >= 1)";
-  EXPECT_EQ(expected_descr4, DescribeNegation(m));
-
-  m = AllOf(Gt(0), Ne(1), Ne(2));
-  std::string expected_descr5 =
-      "(isn't > 0) or (is equal to 1) or (is equal to 2)";
-  EXPECT_EQ(expected_descr5, DescribeNegation(m));
-
-  m = AllOf(Gt(0), Ne(1), Ne(2), Ne(3));
-  std::string expected_descr6 =
-      "(isn't > 0) or (is equal to 1) or (is equal to 2) or (is equal to 3)";
-  EXPECT_EQ(expected_descr6, DescribeNegation(m));
-
-  m = AllOf(Ge(0), Lt(10), Ne(3), Ne(5), Ne(7));
-  std::string expected_desr7 =
-      "(isn't >= 0) or (isn't < 10) or (is equal to 3) or (is equal to 5) or "
-      "(is equal to 7)";
-  EXPECT_EQ(expected_desr7, DescribeNegation(m));
-
-  m = AllOf(Ne(1), Ne(2), Ne(3), Ne(4), Ne(5), Ne(6), Ne(7), Ne(8), Ne(9),
-            Ne(10), Ne(11));
-  AllOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);
-  EXPECT_THAT(Describe(m), EndsWith("and (isn't equal to 11)"));
-  AllOfMatches(11, m);
-}
-
-// Tests that monomorphic matchers are safely cast by the AllOf matcher.
-TEST(AllOfTest, AllOfMatcherSafelyCastsMonomorphicMatchers) {
-  // greater_than_5 and less_than_10 are monomorphic matchers.
-  Matcher<int> greater_than_5 = Gt(5);
-  Matcher<int> less_than_10 = Lt(10);
-
-  Matcher<const int&> m = AllOf(greater_than_5, less_than_10);
-  Matcher<int&> m2 = AllOf(greater_than_5, less_than_10);
-  Matcher<int&> m3 = AllOf(greater_than_5, m2);
-
-  // Tests that BothOf works when composing itself.
-  Matcher<const int&> m4 = AllOf(greater_than_5, less_than_10, less_than_10);
-  Matcher<int&> m5 = AllOf(greater_than_5, less_than_10, less_than_10);
-}
-
-TEST(AllOfTest, ExplainsResult) {
-  Matcher<int> m;
-
-  // Successful match.  Both matchers need to explain.  The second
-  // matcher doesn't give an explanation, so only the first matcher's
-  // explanation is printed.
-  m = AllOf(GreaterThan(10), Lt(30));
-  EXPECT_EQ("which is 15 more than 10", Explain(m, 25));
-
-  // Successful match.  Both matchers need to explain.
-  m = AllOf(GreaterThan(10), GreaterThan(20));
-  EXPECT_EQ("which is 20 more than 10, and which is 10 more than 20",
-            Explain(m, 30));
-
-  // Successful match.  All matchers need to explain.  The second
-  // matcher doesn't given an explanation.
-  m = AllOf(GreaterThan(10), Lt(30), GreaterThan(20));
-  EXPECT_EQ("which is 15 more than 10, and which is 5 more than 20",
-            Explain(m, 25));
-
-  // Successful match.  All matchers need to explain.
-  m = AllOf(GreaterThan(10), GreaterThan(20), GreaterThan(30));
-  EXPECT_EQ("which is 30 more than 10, and which is 20 more than 20, "
-            "and which is 10 more than 30",
-            Explain(m, 40));
-
-  // Failed match.  The first matcher, which failed, needs to
-  // explain.
-  m = AllOf(GreaterThan(10), GreaterThan(20));
-  EXPECT_EQ("which is 5 less than 10", Explain(m, 5));
-
-  // Failed match.  The second matcher, which failed, needs to
-  // explain.  Since it doesn't given an explanation, nothing is
-  // printed.
-  m = AllOf(GreaterThan(10), Lt(30));
-  EXPECT_EQ("", Explain(m, 40));
-
-  // Failed match.  The second matcher, which failed, needs to
-  // explain.
-  m = AllOf(GreaterThan(10), GreaterThan(20));
-  EXPECT_EQ("which is 5 less than 20", Explain(m, 15));
-}
-
-// Helper to allow easy testing of AnyOf matchers with num parameters.
-static void AnyOfMatches(int num, const Matcher<int>& m) {
-  SCOPED_TRACE(Describe(m));
-  EXPECT_FALSE(m.Matches(0));
-  for (int i = 1; i <= num; ++i) {
-    EXPECT_TRUE(m.Matches(i));
-  }
-  EXPECT_FALSE(m.Matches(num + 1));
-}
-
-static void AnyOfStringMatches(int num, const Matcher<std::string>& m) {
-  SCOPED_TRACE(Describe(m));
-  EXPECT_FALSE(m.Matches(std::to_string(0)));
-
-  for (int i = 1; i <= num; ++i) {
-    EXPECT_TRUE(m.Matches(std::to_string(i)));
-  }
-  EXPECT_FALSE(m.Matches(std::to_string(num + 1)));
-}
-
-// Tests that AnyOf(m1, ..., mn) matches any value that matches at
-// least one of the given matchers.
-TEST(AnyOfTest, MatchesWhenAnyMatches) {
-  Matcher<int> m;
-  m = AnyOf(Le(1), Ge(3));
-  EXPECT_TRUE(m.Matches(1));
-  EXPECT_TRUE(m.Matches(4));
-  EXPECT_FALSE(m.Matches(2));
-
-  m = AnyOf(Lt(0), Eq(1), Eq(2));
-  EXPECT_TRUE(m.Matches(-1));
-  EXPECT_TRUE(m.Matches(1));
-  EXPECT_TRUE(m.Matches(2));
-  EXPECT_FALSE(m.Matches(0));
-
-  m = AnyOf(Lt(0), Eq(1), Eq(2), Eq(3));
-  EXPECT_TRUE(m.Matches(-1));
-  EXPECT_TRUE(m.Matches(1));
-  EXPECT_TRUE(m.Matches(2));
-  EXPECT_TRUE(m.Matches(3));
-  EXPECT_FALSE(m.Matches(0));
-
-  m = AnyOf(Le(0), Gt(10), 3, 5, 7);
-  EXPECT_TRUE(m.Matches(0));
-  EXPECT_TRUE(m.Matches(11));
-  EXPECT_TRUE(m.Matches(3));
-  EXPECT_FALSE(m.Matches(2));
-
-  // The following tests for varying number of sub-matchers. Due to the way
-  // the sub-matchers are handled it is enough to test every sub-matcher once
-  // with sub-matchers using the same matcher type. Varying matcher types are
-  // checked for above.
-  AnyOfMatches(2, AnyOf(1, 2));
-  AnyOfMatches(3, AnyOf(1, 2, 3));
-  AnyOfMatches(4, AnyOf(1, 2, 3, 4));
-  AnyOfMatches(5, AnyOf(1, 2, 3, 4, 5));
-  AnyOfMatches(6, AnyOf(1, 2, 3, 4, 5, 6));
-  AnyOfMatches(7, AnyOf(1, 2, 3, 4, 5, 6, 7));
-  AnyOfMatches(8, AnyOf(1, 2, 3, 4, 5, 6, 7, 8));
-  AnyOfMatches(9, AnyOf(1, 2, 3, 4, 5, 6, 7, 8, 9));
-  AnyOfMatches(10, AnyOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
-}
-
-// Tests the variadic version of the AnyOfMatcher.
-TEST(AnyOfTest, VariadicMatchesWhenAnyMatches) {
-  // Also make sure AnyOf is defined in the right namespace and does not depend
-  // on ADL.
-  Matcher<int> m = ::testing::AnyOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);
-
-  EXPECT_THAT(Describe(m), EndsWith("or (is equal to 11)"));
-  AnyOfMatches(11, m);
-  AnyOfMatches(50, AnyOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
-                         11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
-                         21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
-                         31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
-                         41, 42, 43, 44, 45, 46, 47, 48, 49, 50));
-  AnyOfStringMatches(
-      50, AnyOf("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
-                "13", "14", "15", "16", "17", "18", "19", "20", "21", "22",
-                "23", "24", "25", "26", "27", "28", "29", "30", "31", "32",
-                "33", "34", "35", "36", "37", "38", "39", "40", "41", "42",
-                "43", "44", "45", "46", "47", "48", "49", "50"));
-}
-
-// Tests the variadic version of the ElementsAreMatcher
-TEST(ElementsAreTest, HugeMatcher) {
-  vector<int> test_vector{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};
-
-  EXPECT_THAT(test_vector,
-              ElementsAre(Eq(1), Eq(2), Lt(13), Eq(4), Eq(5), Eq(6), Eq(7),
-                          Eq(8), Eq(9), Eq(10), Gt(1), Eq(12)));
-}
-
-// Tests the variadic version of the UnorderedElementsAreMatcher
-TEST(ElementsAreTest, HugeMatcherStr) {
-  vector<std::string> test_vector{
-      "literal_string", "", "", "", "", "", "", "", "", "", "", ""};
-
-  EXPECT_THAT(test_vector, UnorderedElementsAre("literal_string", _, _, _, _, _,
-                                                _, _, _, _, _, _));
-}
-
-// Tests the variadic version of the UnorderedElementsAreMatcher
-TEST(ElementsAreTest, HugeMatcherUnordered) {
-  vector<int> test_vector{2, 1, 8, 5, 4, 6, 7, 3, 9, 12, 11, 10};
-
-  EXPECT_THAT(test_vector, UnorderedElementsAre(
-                               Eq(2), Eq(1), Gt(7), Eq(5), Eq(4), Eq(6), Eq(7),
-                               Eq(3), Eq(9), Eq(12), Eq(11), Ne(122)));
-}
-
-
-// Tests that AnyOf(m1, ..., mn) describes itself properly.
-TEST(AnyOfTest, CanDescribeSelf) {
-  Matcher<int> m;
-  m = AnyOf(Le(1), Ge(3));
-
-  EXPECT_EQ("(is <= 1) or (is >= 3)",
-            Describe(m));
-
-  m = AnyOf(Lt(0), Eq(1), Eq(2));
-  EXPECT_EQ("(is < 0) or (is equal to 1) or (is equal to 2)", Describe(m));
-
-  m = AnyOf(Lt(0), Eq(1), Eq(2), Eq(3));
-  EXPECT_EQ("(is < 0) or (is equal to 1) or (is equal to 2) or (is equal to 3)",
-            Describe(m));
-
-  m = AnyOf(Le(0), Gt(10), 3, 5, 7);
-  EXPECT_EQ(
-      "(is <= 0) or (is > 10) or (is equal to 3) or (is equal to 5) or (is "
-      "equal to 7)",
-      Describe(m));
-}
-
-// Tests that AnyOf(m1, ..., mn) describes its negation properly.
-TEST(AnyOfTest, CanDescribeNegation) {
-  Matcher<int> m;
-  m = AnyOf(Le(1), Ge(3));
-  EXPECT_EQ("(isn't <= 1) and (isn't >= 3)",
-            DescribeNegation(m));
-
-  m = AnyOf(Lt(0), Eq(1), Eq(2));
-  EXPECT_EQ("(isn't < 0) and (isn't equal to 1) and (isn't equal to 2)",
-            DescribeNegation(m));
-
-  m = AnyOf(Lt(0), Eq(1), Eq(2), Eq(3));
-  EXPECT_EQ(
-      "(isn't < 0) and (isn't equal to 1) and (isn't equal to 2) and (isn't "
-      "equal to 3)",
-      DescribeNegation(m));
-
-  m = AnyOf(Le(0), Gt(10), 3, 5, 7);
-  EXPECT_EQ(
-      "(isn't <= 0) and (isn't > 10) and (isn't equal to 3) and (isn't equal "
-      "to 5) and (isn't equal to 7)",
-      DescribeNegation(m));
-}
-
-// Tests that monomorphic matchers are safely cast by the AnyOf matcher.
-TEST(AnyOfTest, AnyOfMatcherSafelyCastsMonomorphicMatchers) {
-  // greater_than_5 and less_than_10 are monomorphic matchers.
-  Matcher<int> greater_than_5 = Gt(5);
-  Matcher<int> less_than_10 = Lt(10);
-
-  Matcher<const int&> m = AnyOf(greater_than_5, less_than_10);
-  Matcher<int&> m2 = AnyOf(greater_than_5, less_than_10);
-  Matcher<int&> m3 = AnyOf(greater_than_5, m2);
-
-  // Tests that EitherOf works when composing itself.
-  Matcher<const int&> m4 = AnyOf(greater_than_5, less_than_10, less_than_10);
-  Matcher<int&> m5 = AnyOf(greater_than_5, less_than_10, less_than_10);
-}
-
-TEST(AnyOfTest, ExplainsResult) {
-  Matcher<int> m;
-
-  // Failed match.  Both matchers need to explain.  The second
-  // matcher doesn't give an explanation, so only the first matcher's
-  // explanation is printed.
-  m = AnyOf(GreaterThan(10), Lt(0));
-  EXPECT_EQ("which is 5 less than 10", Explain(m, 5));
-
-  // Failed match.  Both matchers need to explain.
-  m = AnyOf(GreaterThan(10), GreaterThan(20));
-  EXPECT_EQ("which is 5 less than 10, and which is 15 less than 20",
-            Explain(m, 5));
-
-  // Failed match.  All matchers need to explain.  The second
-  // matcher doesn't given an explanation.
-  m = AnyOf(GreaterThan(10), Gt(20), GreaterThan(30));
-  EXPECT_EQ("which is 5 less than 10, and which is 25 less than 30",
-            Explain(m, 5));
-
-  // Failed match.  All matchers need to explain.
-  m = AnyOf(GreaterThan(10), GreaterThan(20), GreaterThan(30));
-  EXPECT_EQ("which is 5 less than 10, and which is 15 less than 20, "
-            "and which is 25 less than 30",
-            Explain(m, 5));
-
-  // Successful match.  The first matcher, which succeeded, needs to
-  // explain.
-  m = AnyOf(GreaterThan(10), GreaterThan(20));
-  EXPECT_EQ("which is 5 more than 10", Explain(m, 15));
-
-  // Successful match.  The second matcher, which succeeded, needs to
-  // explain.  Since it doesn't given an explanation, nothing is
-  // printed.
-  m = AnyOf(GreaterThan(10), Lt(30));
-  EXPECT_EQ("", Explain(m, 0));
-
-  // Successful match.  The second matcher, which succeeded, needs to
-  // explain.
-  m = AnyOf(GreaterThan(30), GreaterThan(20));
-  EXPECT_EQ("which is 5 more than 20", Explain(m, 25));
-}
-
-// The following predicate function and predicate functor are for
-// testing the Truly(predicate) matcher.
-
-// Returns non-zero if the input is positive.  Note that the return
-// type of this function is not bool.  It's OK as Truly() accepts any
-// unary function or functor whose return type can be implicitly
-// converted to bool.
-int IsPositive(double x) {
-  return x > 0 ? 1 : 0;
-}
-
-// This functor returns true if the input is greater than the given
-// number.
-class IsGreaterThan {
- public:
-  explicit IsGreaterThan(int threshold) : threshold_(threshold) {}
-
-  bool operator()(int n) const { return n > threshold_; }
-
- private:
-  int threshold_;
-};
-
-// For testing Truly().
-const int foo = 0;
-
-// This predicate returns true if and only if the argument references foo and
-// has a zero value.
-bool ReferencesFooAndIsZero(const int& n) {
-  return (&n == &foo) && (n == 0);
-}
-
-// Tests that Truly(predicate) matches what satisfies the given
-// predicate.
-TEST(TrulyTest, MatchesWhatSatisfiesThePredicate) {
-  Matcher<double> m = Truly(IsPositive);
-  EXPECT_TRUE(m.Matches(2.0));
-  EXPECT_FALSE(m.Matches(-1.5));
-}
-
-// Tests that Truly(predicate_functor) works too.
-TEST(TrulyTest, CanBeUsedWithFunctor) {
-  Matcher<int> m = Truly(IsGreaterThan(5));
-  EXPECT_TRUE(m.Matches(6));
-  EXPECT_FALSE(m.Matches(4));
-}
-
-// A class that can be implicitly converted to bool.
-class ConvertibleToBool {
- public:
-  explicit ConvertibleToBool(int number) : number_(number) {}
-  operator bool() const { return number_ != 0; }
-
- private:
-  int number_;
-};
-
-ConvertibleToBool IsNotZero(int number) {
-  return ConvertibleToBool(number);
-}
-
-// Tests that the predicate used in Truly() may return a class that's
-// implicitly convertible to bool, even when the class has no
-// operator!().
-TEST(TrulyTest, PredicateCanReturnAClassConvertibleToBool) {
-  Matcher<int> m = Truly(IsNotZero);
-  EXPECT_TRUE(m.Matches(1));
-  EXPECT_FALSE(m.Matches(0));
-}
-
-// Tests that Truly(predicate) can describe itself properly.
-TEST(TrulyTest, CanDescribeSelf) {
-  Matcher<double> m = Truly(IsPositive);
-  EXPECT_EQ("satisfies the given predicate",
-            Describe(m));
-}
-
-// Tests that Truly(predicate) works when the matcher takes its
-// argument by reference.
-TEST(TrulyTest, WorksForByRefArguments) {
-  Matcher<const int&> m = Truly(ReferencesFooAndIsZero);
-  EXPECT_TRUE(m.Matches(foo));
-  int n = 0;
-  EXPECT_FALSE(m.Matches(n));
-}
-
-// Tests that Truly(predicate) provides a helpful reason when it fails.
-TEST(TrulyTest, ExplainsFailures) {
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(Truly(IsPositive), -1, &listener));
-  EXPECT_EQ(listener.str(), "didn't satisfy the given predicate");
-}
-
-// Tests that Matches(m) is a predicate satisfied by whatever that
-// matches matcher m.
-TEST(MatchesTest, IsSatisfiedByWhatMatchesTheMatcher) {
-  EXPECT_TRUE(Matches(Ge(0))(1));
-  EXPECT_FALSE(Matches(Eq('a'))('b'));
-}
-
-// Tests that Matches(m) works when the matcher takes its argument by
-// reference.
-TEST(MatchesTest, WorksOnByRefArguments) {
-  int m = 0, n = 0;
-  EXPECT_TRUE(Matches(AllOf(Ref(n), Eq(0)))(n));
-  EXPECT_FALSE(Matches(Ref(m))(n));
-}
-
-// Tests that a Matcher on non-reference type can be used in
-// Matches().
-TEST(MatchesTest, WorksWithMatcherOnNonRefType) {
-  Matcher<int> eq5 = Eq(5);
-  EXPECT_TRUE(Matches(eq5)(5));
-  EXPECT_FALSE(Matches(eq5)(2));
-}
-
-// Tests Value(value, matcher).  Since Value() is a simple wrapper for
-// Matches(), which has been tested already, we don't spend a lot of
-// effort on testing Value().
-TEST(ValueTest, WorksWithPolymorphicMatcher) {
-  EXPECT_TRUE(Value("hi", StartsWith("h")));
-  EXPECT_FALSE(Value(5, Gt(10)));
-}
-
-TEST(ValueTest, WorksWithMonomorphicMatcher) {
-  const Matcher<int> is_zero = Eq(0);
-  EXPECT_TRUE(Value(0, is_zero));
-  EXPECT_FALSE(Value('a', is_zero));
-
-  int n = 0;
-  const Matcher<const int&> ref_n = Ref(n);
-  EXPECT_TRUE(Value(n, ref_n));
-  EXPECT_FALSE(Value(1, ref_n));
-}
-
-TEST(ExplainMatchResultTest, WorksWithPolymorphicMatcher) {
-  StringMatchResultListener listener1;
-  EXPECT_TRUE(ExplainMatchResult(PolymorphicIsEven(), 42, &listener1));
-  EXPECT_EQ("% 2 == 0", listener1.str());
-
-  StringMatchResultListener listener2;
-  EXPECT_FALSE(ExplainMatchResult(Ge(42), 1.5, &listener2));
-  EXPECT_EQ("", listener2.str());
-}
-
-TEST(ExplainMatchResultTest, WorksWithMonomorphicMatcher) {
-  const Matcher<int> is_even = PolymorphicIsEven();
-  StringMatchResultListener listener1;
-  EXPECT_TRUE(ExplainMatchResult(is_even, 42, &listener1));
-  EXPECT_EQ("% 2 == 0", listener1.str());
-
-  const Matcher<const double&> is_zero = Eq(0);
-  StringMatchResultListener listener2;
-  EXPECT_FALSE(ExplainMatchResult(is_zero, 1.5, &listener2));
-  EXPECT_EQ("", listener2.str());
-}
-
-MATCHER(ConstructNoArg, "") { return true; }
-MATCHER_P(Construct1Arg, arg1, "") { return true; }
-MATCHER_P2(Construct2Args, arg1, arg2, "") { return true; }
-
-TEST(MatcherConstruct, ExplicitVsImplicit) {
-  {
-    // No arg constructor can be constructed with empty brace.
-    ConstructNoArgMatcher m = {};
-    (void)m;
-    // And with no args
-    ConstructNoArgMatcher m2;
-    (void)m2;
-  }
-  {
-    // The one arg constructor has an explicit constructor.
-    // This is to prevent the implicit conversion.
-    using M = Construct1ArgMatcherP<int>;
-    EXPECT_TRUE((std::is_constructible<M, int>::value));
-    EXPECT_FALSE((std::is_convertible<int, M>::value));
-  }
-  {
-    // Multiple arg matchers can be constructed with an implicit construction.
-    Construct2ArgsMatcherP2<int, double> m = {1, 2.2};
-    (void)m;
-  }
-}
-
-MATCHER_P(Really, inner_matcher, "") {
-  return ExplainMatchResult(inner_matcher, arg, result_listener);
-}
-
-TEST(ExplainMatchResultTest, WorksInsideMATCHER) {
-  EXPECT_THAT(0, Really(Eq(0)));
-}
-
-TEST(DescribeMatcherTest, WorksWithValue) {
-  EXPECT_EQ("is equal to 42", DescribeMatcher<int>(42));
-  EXPECT_EQ("isn't equal to 42", DescribeMatcher<int>(42, true));
-}
-
-TEST(DescribeMatcherTest, WorksWithMonomorphicMatcher) {
-  const Matcher<int> monomorphic = Le(0);
-  EXPECT_EQ("is <= 0", DescribeMatcher<int>(monomorphic));
-  EXPECT_EQ("isn't <= 0", DescribeMatcher<int>(monomorphic, true));
-}
-
-TEST(DescribeMatcherTest, WorksWithPolymorphicMatcher) {
-  EXPECT_EQ("is even", DescribeMatcher<int>(PolymorphicIsEven()));
-  EXPECT_EQ("is odd", DescribeMatcher<int>(PolymorphicIsEven(), true));
-}
-
-TEST(AllArgsTest, WorksForTuple) {
-  EXPECT_THAT(std::make_tuple(1, 2L), AllArgs(Lt()));
-  EXPECT_THAT(std::make_tuple(2L, 1), Not(AllArgs(Lt())));
-}
-
-TEST(AllArgsTest, WorksForNonTuple) {
-  EXPECT_THAT(42, AllArgs(Gt(0)));
-  EXPECT_THAT('a', Not(AllArgs(Eq('b'))));
-}
-
-class AllArgsHelper {
- public:
-  AllArgsHelper() {}
-
-  MOCK_METHOD2(Helper, int(char x, int y));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AllArgsHelper);
-};
-
-TEST(AllArgsTest, WorksInWithClause) {
-  AllArgsHelper helper;
-  ON_CALL(helper, Helper(_, _))
-      .With(AllArgs(Lt()))
-      .WillByDefault(Return(1));
-  EXPECT_CALL(helper, Helper(_, _));
-  EXPECT_CALL(helper, Helper(_, _))
-      .With(AllArgs(Gt()))
-      .WillOnce(Return(2));
-
-  EXPECT_EQ(1, helper.Helper('\1', 2));
-  EXPECT_EQ(2, helper.Helper('a', 1));
-}
-
-class OptionalMatchersHelper {
- public:
-  OptionalMatchersHelper() {}
-
-  MOCK_METHOD0(NoArgs, int());
-
-  MOCK_METHOD1(OneArg, int(int y));
-
-  MOCK_METHOD2(TwoArgs, int(char x, int y));
-
-  MOCK_METHOD1(Overloaded, int(char x));
-  MOCK_METHOD2(Overloaded, int(char x, int y));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OptionalMatchersHelper);
-};
-
-TEST(AllArgsTest, WorksWithoutMatchers) {
-  OptionalMatchersHelper helper;
-
-  ON_CALL(helper, NoArgs).WillByDefault(Return(10));
-  ON_CALL(helper, OneArg).WillByDefault(Return(20));
-  ON_CALL(helper, TwoArgs).WillByDefault(Return(30));
-
-  EXPECT_EQ(10, helper.NoArgs());
-  EXPECT_EQ(20, helper.OneArg(1));
-  EXPECT_EQ(30, helper.TwoArgs('\1', 2));
-
-  EXPECT_CALL(helper, NoArgs).Times(1);
-  EXPECT_CALL(helper, OneArg).WillOnce(Return(100));
-  EXPECT_CALL(helper, OneArg(17)).WillOnce(Return(200));
-  EXPECT_CALL(helper, TwoArgs).Times(0);
-
-  EXPECT_EQ(10, helper.NoArgs());
-  EXPECT_EQ(100, helper.OneArg(1));
-  EXPECT_EQ(200, helper.OneArg(17));
-}
-
-// Tests that ASSERT_THAT() and EXPECT_THAT() work when the value
-// matches the matcher.
-TEST(MatcherAssertionTest, WorksWhenMatcherIsSatisfied) {
-  ASSERT_THAT(5, Ge(2)) << "This should succeed.";
-  ASSERT_THAT("Foo", EndsWith("oo"));
-  EXPECT_THAT(2, AllOf(Le(7), Ge(0))) << "This should succeed too.";
-  EXPECT_THAT("Hello", StartsWith("Hell"));
-}
-
-// Tests that ASSERT_THAT() and EXPECT_THAT() work when the value
-// doesn't match the matcher.
-TEST(MatcherAssertionTest, WorksWhenMatcherIsNotSatisfied) {
-  // 'n' must be static as it is used in an EXPECT_FATAL_FAILURE(),
-  // which cannot reference auto variables.
-  static unsigned short n;  // NOLINT
-  n = 5;
-
-  EXPECT_FATAL_FAILURE(ASSERT_THAT(n, Gt(10)),
-                       "Value of: n\n"
-                       "Expected: is > 10\n"
-                       "  Actual: 5" + OfType("unsigned short"));
-  n = 0;
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THAT(n, AllOf(Le(7), Ge(5))),
-      "Value of: n\n"
-      "Expected: (is <= 7) and (is >= 5)\n"
-      "  Actual: 0" + OfType("unsigned short"));
-}
-
-// Tests that ASSERT_THAT() and EXPECT_THAT() work when the argument
-// has a reference type.
-TEST(MatcherAssertionTest, WorksForByRefArguments) {
-  // We use a static variable here as EXPECT_FATAL_FAILURE() cannot
-  // reference auto variables.
-  static int n;
-  n = 0;
-  EXPECT_THAT(n, AllOf(Le(7), Ref(n)));
-  EXPECT_FATAL_FAILURE(ASSERT_THAT(n, Not(Ref(n))),
-                       "Value of: n\n"
-                       "Expected: does not reference the variable @");
-  // Tests the "Actual" part.
-  EXPECT_FATAL_FAILURE(ASSERT_THAT(n, Not(Ref(n))),
-                       "Actual: 0" + OfType("int") + ", which is located @");
-}
-
-// Tests that ASSERT_THAT() and EXPECT_THAT() work when the matcher is
-// monomorphic.
-TEST(MatcherAssertionTest, WorksForMonomorphicMatcher) {
-  Matcher<const char*> starts_with_he = StartsWith("he");
-  ASSERT_THAT("hello", starts_with_he);
-
-  Matcher<const std::string&> ends_with_ok = EndsWith("ok");
-  ASSERT_THAT("book", ends_with_ok);
-  const std::string bad = "bad";
-  EXPECT_NONFATAL_FAILURE(EXPECT_THAT(bad, ends_with_ok),
-                          "Value of: bad\n"
-                          "Expected: ends with \"ok\"\n"
-                          "  Actual: \"bad\"");
-  Matcher<int> is_greater_than_5 = Gt(5);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THAT(5, is_greater_than_5),
-                          "Value of: 5\n"
-                          "Expected: is > 5\n"
-                          "  Actual: 5" + OfType("int"));
-}
-
-// Tests floating-point matchers.
-template <typename RawType>
-class FloatingPointTest : public testing::Test {
- protected:
-  typedef testing::internal::FloatingPoint<RawType> Floating;
-  typedef typename Floating::Bits Bits;
-
-  FloatingPointTest()
-      : max_ulps_(Floating::kMaxUlps),
-        zero_bits_(Floating(0).bits()),
-        one_bits_(Floating(1).bits()),
-        infinity_bits_(Floating(Floating::Infinity()).bits()),
-        close_to_positive_zero_(
-            Floating::ReinterpretBits(zero_bits_ + max_ulps_/2)),
-        close_to_negative_zero_(
-            -Floating::ReinterpretBits(zero_bits_ + max_ulps_ - max_ulps_/2)),
-        further_from_negative_zero_(-Floating::ReinterpretBits(
-            zero_bits_ + max_ulps_ + 1 - max_ulps_/2)),
-        close_to_one_(Floating::ReinterpretBits(one_bits_ + max_ulps_)),
-        further_from_one_(Floating::ReinterpretBits(one_bits_ + max_ulps_ + 1)),
-        infinity_(Floating::Infinity()),
-        close_to_infinity_(
-            Floating::ReinterpretBits(infinity_bits_ - max_ulps_)),
-        further_from_infinity_(
-            Floating::ReinterpretBits(infinity_bits_ - max_ulps_ - 1)),
-        max_(Floating::Max()),
-        nan1_(Floating::ReinterpretBits(Floating::kExponentBitMask | 1)),
-        nan2_(Floating::ReinterpretBits(Floating::kExponentBitMask | 200)) {
-  }
-
-  void TestSize() {
-    EXPECT_EQ(sizeof(RawType), sizeof(Bits));
-  }
-
-  // A battery of tests for FloatingEqMatcher::Matches.
-  // matcher_maker is a pointer to a function which creates a FloatingEqMatcher.
-  void TestMatches(
-      testing::internal::FloatingEqMatcher<RawType> (*matcher_maker)(RawType)) {
-    Matcher<RawType> m1 = matcher_maker(0.0);
-    EXPECT_TRUE(m1.Matches(-0.0));
-    EXPECT_TRUE(m1.Matches(close_to_positive_zero_));
-    EXPECT_TRUE(m1.Matches(close_to_negative_zero_));
-    EXPECT_FALSE(m1.Matches(1.0));
-
-    Matcher<RawType> m2 = matcher_maker(close_to_positive_zero_);
-    EXPECT_FALSE(m2.Matches(further_from_negative_zero_));
-
-    Matcher<RawType> m3 = matcher_maker(1.0);
-    EXPECT_TRUE(m3.Matches(close_to_one_));
-    EXPECT_FALSE(m3.Matches(further_from_one_));
-
-    // Test commutativity: matcher_maker(0.0).Matches(1.0) was tested above.
-    EXPECT_FALSE(m3.Matches(0.0));
-
-    Matcher<RawType> m4 = matcher_maker(-infinity_);
-    EXPECT_TRUE(m4.Matches(-close_to_infinity_));
-
-    Matcher<RawType> m5 = matcher_maker(infinity_);
-    EXPECT_TRUE(m5.Matches(close_to_infinity_));
-
-    // This is interesting as the representations of infinity_ and nan1_
-    // are only 1 DLP apart.
-    EXPECT_FALSE(m5.Matches(nan1_));
-
-    // matcher_maker can produce a Matcher<const RawType&>, which is needed in
-    // some cases.
-    Matcher<const RawType&> m6 = matcher_maker(0.0);
-    EXPECT_TRUE(m6.Matches(-0.0));
-    EXPECT_TRUE(m6.Matches(close_to_positive_zero_));
-    EXPECT_FALSE(m6.Matches(1.0));
-
-    // matcher_maker can produce a Matcher<RawType&>, which is needed in some
-    // cases.
-    Matcher<RawType&> m7 = matcher_maker(0.0);
-    RawType x = 0.0;
-    EXPECT_TRUE(m7.Matches(x));
-    x = 0.01f;
-    EXPECT_FALSE(m7.Matches(x));
-  }
-
-  // Pre-calculated numbers to be used by the tests.
-
-  const Bits max_ulps_;
-
-  const Bits zero_bits_;  // The bits that represent 0.0.
-  const Bits one_bits_;  // The bits that represent 1.0.
-  const Bits infinity_bits_;  // The bits that represent +infinity.
-
-  // Some numbers close to 0.0.
-  const RawType close_to_positive_zero_;
-  const RawType close_to_negative_zero_;
-  const RawType further_from_negative_zero_;
-
-  // Some numbers close to 1.0.
-  const RawType close_to_one_;
-  const RawType further_from_one_;
-
-  // Some numbers close to +infinity.
-  const RawType infinity_;
-  const RawType close_to_infinity_;
-  const RawType further_from_infinity_;
-
-  // Maximum representable value that's not infinity.
-  const RawType max_;
-
-  // Some NaNs.
-  const RawType nan1_;
-  const RawType nan2_;
-};
-
-// Tests floating-point matchers with fixed epsilons.
-template <typename RawType>
-class FloatingPointNearTest : public FloatingPointTest<RawType> {
- protected:
-  typedef FloatingPointTest<RawType> ParentType;
-
-  // A battery of tests for FloatingEqMatcher::Matches with a fixed epsilon.
-  // matcher_maker is a pointer to a function which creates a FloatingEqMatcher.
-  void TestNearMatches(
-      testing::internal::FloatingEqMatcher<RawType>
-          (*matcher_maker)(RawType, RawType)) {
-    Matcher<RawType> m1 = matcher_maker(0.0, 0.0);
-    EXPECT_TRUE(m1.Matches(0.0));
-    EXPECT_TRUE(m1.Matches(-0.0));
-    EXPECT_FALSE(m1.Matches(ParentType::close_to_positive_zero_));
-    EXPECT_FALSE(m1.Matches(ParentType::close_to_negative_zero_));
-    EXPECT_FALSE(m1.Matches(1.0));
-
-    Matcher<RawType> m2 = matcher_maker(0.0, 1.0);
-    EXPECT_TRUE(m2.Matches(0.0));
-    EXPECT_TRUE(m2.Matches(-0.0));
-    EXPECT_TRUE(m2.Matches(1.0));
-    EXPECT_TRUE(m2.Matches(-1.0));
-    EXPECT_FALSE(m2.Matches(ParentType::close_to_one_));
-    EXPECT_FALSE(m2.Matches(-ParentType::close_to_one_));
-
-    // Check that inf matches inf, regardless of the of the specified max
-    // absolute error.
-    Matcher<RawType> m3 = matcher_maker(ParentType::infinity_, 0.0);
-    EXPECT_TRUE(m3.Matches(ParentType::infinity_));
-    EXPECT_FALSE(m3.Matches(ParentType::close_to_infinity_));
-    EXPECT_FALSE(m3.Matches(-ParentType::infinity_));
-
-    Matcher<RawType> m4 = matcher_maker(-ParentType::infinity_, 0.0);
-    EXPECT_TRUE(m4.Matches(-ParentType::infinity_));
-    EXPECT_FALSE(m4.Matches(-ParentType::close_to_infinity_));
-    EXPECT_FALSE(m4.Matches(ParentType::infinity_));
-
-    // Test various overflow scenarios.
-    Matcher<RawType> m5 = matcher_maker(ParentType::max_, ParentType::max_);
-    EXPECT_TRUE(m5.Matches(ParentType::max_));
-    EXPECT_FALSE(m5.Matches(-ParentType::max_));
-
-    Matcher<RawType> m6 = matcher_maker(-ParentType::max_, ParentType::max_);
-    EXPECT_FALSE(m6.Matches(ParentType::max_));
-    EXPECT_TRUE(m6.Matches(-ParentType::max_));
-
-    Matcher<RawType> m7 = matcher_maker(ParentType::max_, 0);
-    EXPECT_TRUE(m7.Matches(ParentType::max_));
-    EXPECT_FALSE(m7.Matches(-ParentType::max_));
-
-    Matcher<RawType> m8 = matcher_maker(-ParentType::max_, 0);
-    EXPECT_FALSE(m8.Matches(ParentType::max_));
-    EXPECT_TRUE(m8.Matches(-ParentType::max_));
-
-    // The difference between max() and -max() normally overflows to infinity,
-    // but it should still match if the max_abs_error is also infinity.
-    Matcher<RawType> m9 = matcher_maker(
-        ParentType::max_, ParentType::infinity_);
-    EXPECT_TRUE(m8.Matches(-ParentType::max_));
-
-    // matcher_maker can produce a Matcher<const RawType&>, which is needed in
-    // some cases.
-    Matcher<const RawType&> m10 = matcher_maker(0.0, 1.0);
-    EXPECT_TRUE(m10.Matches(-0.0));
-    EXPECT_TRUE(m10.Matches(ParentType::close_to_positive_zero_));
-    EXPECT_FALSE(m10.Matches(ParentType::close_to_one_));
-
-    // matcher_maker can produce a Matcher<RawType&>, which is needed in some
-    // cases.
-    Matcher<RawType&> m11 = matcher_maker(0.0, 1.0);
-    RawType x = 0.0;
-    EXPECT_TRUE(m11.Matches(x));
-    x = 1.0f;
-    EXPECT_TRUE(m11.Matches(x));
-    x = -1.0f;
-    EXPECT_TRUE(m11.Matches(x));
-    x = 1.1f;
-    EXPECT_FALSE(m11.Matches(x));
-    x = -1.1f;
-    EXPECT_FALSE(m11.Matches(x));
-  }
-};
-
-// Instantiate FloatingPointTest for testing floats.
-typedef FloatingPointTest<float> FloatTest;
-
-TEST_F(FloatTest, FloatEqApproximatelyMatchesFloats) {
-  TestMatches(&FloatEq);
-}
-
-TEST_F(FloatTest, NanSensitiveFloatEqApproximatelyMatchesFloats) {
-  TestMatches(&NanSensitiveFloatEq);
-}
-
-TEST_F(FloatTest, FloatEqCannotMatchNaN) {
-  // FloatEq never matches NaN.
-  Matcher<float> m = FloatEq(nan1_);
-  EXPECT_FALSE(m.Matches(nan1_));
-  EXPECT_FALSE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST_F(FloatTest, NanSensitiveFloatEqCanMatchNaN) {
-  // NanSensitiveFloatEq will match NaN.
-  Matcher<float> m = NanSensitiveFloatEq(nan1_);
-  EXPECT_TRUE(m.Matches(nan1_));
-  EXPECT_TRUE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST_F(FloatTest, FloatEqCanDescribeSelf) {
-  Matcher<float> m1 = FloatEq(2.0f);
-  EXPECT_EQ("is approximately 2", Describe(m1));
-  EXPECT_EQ("isn't approximately 2", DescribeNegation(m1));
-
-  Matcher<float> m2 = FloatEq(0.5f);
-  EXPECT_EQ("is approximately 0.5", Describe(m2));
-  EXPECT_EQ("isn't approximately 0.5", DescribeNegation(m2));
-
-  Matcher<float> m3 = FloatEq(nan1_);
-  EXPECT_EQ("never matches", Describe(m3));
-  EXPECT_EQ("is anything", DescribeNegation(m3));
-}
-
-TEST_F(FloatTest, NanSensitiveFloatEqCanDescribeSelf) {
-  Matcher<float> m1 = NanSensitiveFloatEq(2.0f);
-  EXPECT_EQ("is approximately 2", Describe(m1));
-  EXPECT_EQ("isn't approximately 2", DescribeNegation(m1));
-
-  Matcher<float> m2 = NanSensitiveFloatEq(0.5f);
-  EXPECT_EQ("is approximately 0.5", Describe(m2));
-  EXPECT_EQ("isn't approximately 0.5", DescribeNegation(m2));
-
-  Matcher<float> m3 = NanSensitiveFloatEq(nan1_);
-  EXPECT_EQ("is NaN", Describe(m3));
-  EXPECT_EQ("isn't NaN", DescribeNegation(m3));
-}
-
-// Instantiate FloatingPointTest for testing floats with a user-specified
-// max absolute error.
-typedef FloatingPointNearTest<float> FloatNearTest;
-
-TEST_F(FloatNearTest, FloatNearMatches) {
-  TestNearMatches(&FloatNear);
-}
-
-TEST_F(FloatNearTest, NanSensitiveFloatNearApproximatelyMatchesFloats) {
-  TestNearMatches(&NanSensitiveFloatNear);
-}
-
-TEST_F(FloatNearTest, FloatNearCanDescribeSelf) {
-  Matcher<float> m1 = FloatNear(2.0f, 0.5f);
-  EXPECT_EQ("is approximately 2 (absolute error <= 0.5)", Describe(m1));
-  EXPECT_EQ(
-      "isn't approximately 2 (absolute error > 0.5)", DescribeNegation(m1));
-
-  Matcher<float> m2 = FloatNear(0.5f, 0.5f);
-  EXPECT_EQ("is approximately 0.5 (absolute error <= 0.5)", Describe(m2));
-  EXPECT_EQ(
-      "isn't approximately 0.5 (absolute error > 0.5)", DescribeNegation(m2));
-
-  Matcher<float> m3 = FloatNear(nan1_, 0.0);
-  EXPECT_EQ("never matches", Describe(m3));
-  EXPECT_EQ("is anything", DescribeNegation(m3));
-}
-
-TEST_F(FloatNearTest, NanSensitiveFloatNearCanDescribeSelf) {
-  Matcher<float> m1 = NanSensitiveFloatNear(2.0f, 0.5f);
-  EXPECT_EQ("is approximately 2 (absolute error <= 0.5)", Describe(m1));
-  EXPECT_EQ(
-      "isn't approximately 2 (absolute error > 0.5)", DescribeNegation(m1));
-
-  Matcher<float> m2 = NanSensitiveFloatNear(0.5f, 0.5f);
-  EXPECT_EQ("is approximately 0.5 (absolute error <= 0.5)", Describe(m2));
-  EXPECT_EQ(
-      "isn't approximately 0.5 (absolute error > 0.5)", DescribeNegation(m2));
-
-  Matcher<float> m3 = NanSensitiveFloatNear(nan1_, 0.1f);
-  EXPECT_EQ("is NaN", Describe(m3));
-  EXPECT_EQ("isn't NaN", DescribeNegation(m3));
-}
-
-TEST_F(FloatNearTest, FloatNearCannotMatchNaN) {
-  // FloatNear never matches NaN.
-  Matcher<float> m = FloatNear(ParentType::nan1_, 0.1f);
-  EXPECT_FALSE(m.Matches(nan1_));
-  EXPECT_FALSE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST_F(FloatNearTest, NanSensitiveFloatNearCanMatchNaN) {
-  // NanSensitiveFloatNear will match NaN.
-  Matcher<float> m = NanSensitiveFloatNear(nan1_, 0.1f);
-  EXPECT_TRUE(m.Matches(nan1_));
-  EXPECT_TRUE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-// Instantiate FloatingPointTest for testing doubles.
-typedef FloatingPointTest<double> DoubleTest;
-
-TEST_F(DoubleTest, DoubleEqApproximatelyMatchesDoubles) {
-  TestMatches(&DoubleEq);
-}
-
-TEST_F(DoubleTest, NanSensitiveDoubleEqApproximatelyMatchesDoubles) {
-  TestMatches(&NanSensitiveDoubleEq);
-}
-
-TEST_F(DoubleTest, DoubleEqCannotMatchNaN) {
-  // DoubleEq never matches NaN.
-  Matcher<double> m = DoubleEq(nan1_);
-  EXPECT_FALSE(m.Matches(nan1_));
-  EXPECT_FALSE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST_F(DoubleTest, NanSensitiveDoubleEqCanMatchNaN) {
-  // NanSensitiveDoubleEq will match NaN.
-  Matcher<double> m = NanSensitiveDoubleEq(nan1_);
-  EXPECT_TRUE(m.Matches(nan1_));
-  EXPECT_TRUE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST_F(DoubleTest, DoubleEqCanDescribeSelf) {
-  Matcher<double> m1 = DoubleEq(2.0);
-  EXPECT_EQ("is approximately 2", Describe(m1));
-  EXPECT_EQ("isn't approximately 2", DescribeNegation(m1));
-
-  Matcher<double> m2 = DoubleEq(0.5);
-  EXPECT_EQ("is approximately 0.5", Describe(m2));
-  EXPECT_EQ("isn't approximately 0.5", DescribeNegation(m2));
-
-  Matcher<double> m3 = DoubleEq(nan1_);
-  EXPECT_EQ("never matches", Describe(m3));
-  EXPECT_EQ("is anything", DescribeNegation(m3));
-}
-
-TEST_F(DoubleTest, NanSensitiveDoubleEqCanDescribeSelf) {
-  Matcher<double> m1 = NanSensitiveDoubleEq(2.0);
-  EXPECT_EQ("is approximately 2", Describe(m1));
-  EXPECT_EQ("isn't approximately 2", DescribeNegation(m1));
-
-  Matcher<double> m2 = NanSensitiveDoubleEq(0.5);
-  EXPECT_EQ("is approximately 0.5", Describe(m2));
-  EXPECT_EQ("isn't approximately 0.5", DescribeNegation(m2));
-
-  Matcher<double> m3 = NanSensitiveDoubleEq(nan1_);
-  EXPECT_EQ("is NaN", Describe(m3));
-  EXPECT_EQ("isn't NaN", DescribeNegation(m3));
-}
-
-// Instantiate FloatingPointTest for testing floats with a user-specified
-// max absolute error.
-typedef FloatingPointNearTest<double> DoubleNearTest;
-
-TEST_F(DoubleNearTest, DoubleNearMatches) {
-  TestNearMatches(&DoubleNear);
-}
-
-TEST_F(DoubleNearTest, NanSensitiveDoubleNearApproximatelyMatchesDoubles) {
-  TestNearMatches(&NanSensitiveDoubleNear);
-}
-
-TEST_F(DoubleNearTest, DoubleNearCanDescribeSelf) {
-  Matcher<double> m1 = DoubleNear(2.0, 0.5);
-  EXPECT_EQ("is approximately 2 (absolute error <= 0.5)", Describe(m1));
-  EXPECT_EQ(
-      "isn't approximately 2 (absolute error > 0.5)", DescribeNegation(m1));
-
-  Matcher<double> m2 = DoubleNear(0.5, 0.5);
-  EXPECT_EQ("is approximately 0.5 (absolute error <= 0.5)", Describe(m2));
-  EXPECT_EQ(
-      "isn't approximately 0.5 (absolute error > 0.5)", DescribeNegation(m2));
-
-  Matcher<double> m3 = DoubleNear(nan1_, 0.0);
-  EXPECT_EQ("never matches", Describe(m3));
-  EXPECT_EQ("is anything", DescribeNegation(m3));
-}
-
-TEST_F(DoubleNearTest, ExplainsResultWhenMatchFails) {
-  EXPECT_EQ("", Explain(DoubleNear(2.0, 0.1), 2.05));
-  EXPECT_EQ("which is 0.2 from 2", Explain(DoubleNear(2.0, 0.1), 2.2));
-  EXPECT_EQ("which is -0.3 from 2", Explain(DoubleNear(2.0, 0.1), 1.7));
-
-  const std::string explanation =
-      Explain(DoubleNear(2.1, 1e-10), 2.1 + 1.2e-10);
-  // Different C++ implementations may print floating-point numbers
-  // slightly differently.
-  EXPECT_TRUE(explanation == "which is 1.2e-10 from 2.1" ||  // GCC
-              explanation == "which is 1.2e-010 from 2.1")   // MSVC
-      << " where explanation is \"" << explanation << "\".";
-}
-
-TEST_F(DoubleNearTest, NanSensitiveDoubleNearCanDescribeSelf) {
-  Matcher<double> m1 = NanSensitiveDoubleNear(2.0, 0.5);
-  EXPECT_EQ("is approximately 2 (absolute error <= 0.5)", Describe(m1));
-  EXPECT_EQ(
-      "isn't approximately 2 (absolute error > 0.5)", DescribeNegation(m1));
-
-  Matcher<double> m2 = NanSensitiveDoubleNear(0.5, 0.5);
-  EXPECT_EQ("is approximately 0.5 (absolute error <= 0.5)", Describe(m2));
-  EXPECT_EQ(
-      "isn't approximately 0.5 (absolute error > 0.5)", DescribeNegation(m2));
-
-  Matcher<double> m3 = NanSensitiveDoubleNear(nan1_, 0.1);
-  EXPECT_EQ("is NaN", Describe(m3));
-  EXPECT_EQ("isn't NaN", DescribeNegation(m3));
-}
-
-TEST_F(DoubleNearTest, DoubleNearCannotMatchNaN) {
-  // DoubleNear never matches NaN.
-  Matcher<double> m = DoubleNear(ParentType::nan1_, 0.1);
-  EXPECT_FALSE(m.Matches(nan1_));
-  EXPECT_FALSE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST_F(DoubleNearTest, NanSensitiveDoubleNearCanMatchNaN) {
-  // NanSensitiveDoubleNear will match NaN.
-  Matcher<double> m = NanSensitiveDoubleNear(nan1_, 0.1);
-  EXPECT_TRUE(m.Matches(nan1_));
-  EXPECT_TRUE(m.Matches(nan2_));
-  EXPECT_FALSE(m.Matches(1.0));
-}
-
-TEST(PointeeTest, RawPointer) {
-  const Matcher<int*> m = Pointee(Ge(0));
-
-  int n = 1;
-  EXPECT_TRUE(m.Matches(&n));
-  n = -1;
-  EXPECT_FALSE(m.Matches(&n));
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-TEST(PointeeTest, RawPointerToConst) {
-  const Matcher<const double*> m = Pointee(Ge(0));
-
-  double x = 1;
-  EXPECT_TRUE(m.Matches(&x));
-  x = -1;
-  EXPECT_FALSE(m.Matches(&x));
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-TEST(PointeeTest, ReferenceToConstRawPointer) {
-  const Matcher<int* const &> m = Pointee(Ge(0));
-
-  int n = 1;
-  EXPECT_TRUE(m.Matches(&n));
-  n = -1;
-  EXPECT_FALSE(m.Matches(&n));
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-TEST(PointeeTest, ReferenceToNonConstRawPointer) {
-  const Matcher<double* &> m = Pointee(Ge(0));
-
-  double x = 1.0;
-  double* p = &x;
-  EXPECT_TRUE(m.Matches(p));
-  x = -1;
-  EXPECT_FALSE(m.Matches(p));
-  p = nullptr;
-  EXPECT_FALSE(m.Matches(p));
-}
-
-TEST(PointeeTest, SmartPointer) {
-  const Matcher<std::unique_ptr<int>> m = Pointee(Ge(0));
-
-  std::unique_ptr<int> n(new int(1));
-  EXPECT_TRUE(m.Matches(n));
-}
-
-TEST(PointeeTest, SmartPointerToConst) {
-  const Matcher<std::unique_ptr<const int>> m = Pointee(Ge(0));
-
-  // There's no implicit conversion from unique_ptr<int> to const
-  // unique_ptr<const int>, so we must pass a unique_ptr<const int> into the
-  // matcher.
-  std::unique_ptr<const int> n(new int(1));
-  EXPECT_TRUE(m.Matches(n));
-}
-
-TEST(PointerTest, RawPointer) {
-  int n = 1;
-  const Matcher<int*> m = Pointer(Eq(&n));
-
-  EXPECT_TRUE(m.Matches(&n));
-
-  int* p = nullptr;
-  EXPECT_FALSE(m.Matches(p));
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-TEST(PointerTest, RawPointerToConst) {
-  int n = 1;
-  const Matcher<const int*> m = Pointer(Eq(&n));
-
-  EXPECT_TRUE(m.Matches(&n));
-
-  int* p = nullptr;
-  EXPECT_FALSE(m.Matches(p));
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-TEST(PointerTest, SmartPointer) {
-  std::unique_ptr<int> n(new int(10));
-  int* raw_n = n.get();
-  const Matcher<std::unique_ptr<int>> m = Pointer(Eq(raw_n));
-
-  EXPECT_TRUE(m.Matches(n));
-}
-
-TEST(PointerTest, SmartPointerToConst) {
-  std::unique_ptr<const int> n(new int(10));
-  const int* raw_n = n.get();
-  const Matcher<std::unique_ptr<const int>> m = Pointer(Eq(raw_n));
-
-  // There's no implicit conversion from unique_ptr<int> to const
-  // unique_ptr<const int>, so we must pass a unique_ptr<const int> into the
-  // matcher.
-  std::unique_ptr<const int> p(new int(10));
-  EXPECT_FALSE(m.Matches(p));
-}
-
-TEST(AddressTest, NonConst) {
-  int n = 1;
-  const Matcher<int> m = Address(Eq(&n));
-
-  EXPECT_TRUE(m.Matches(n));
-
-  int other = 5;
-
-  EXPECT_FALSE(m.Matches(other));
-
-  int& n_ref = n;
-
-  EXPECT_TRUE(m.Matches(n_ref));
-}
-
-TEST(AddressTest, Const) {
-  const int n = 1;
-  const Matcher<int> m = Address(Eq(&n));
-
-  EXPECT_TRUE(m.Matches(n));
-
-  int other = 5;
-
-  EXPECT_FALSE(m.Matches(other));
-}
-
-TEST(AddressTest, MatcherDoesntCopy) {
-  std::unique_ptr<int> n(new int(1));
-  const Matcher<std::unique_ptr<int>> m = Address(Eq(&n));
-
-  EXPECT_TRUE(m.Matches(n));
-}
-
-TEST(AddressTest, Describe) {
-  Matcher<int> matcher = Address(_);
-  EXPECT_EQ("has address that is anything", Describe(matcher));
-  EXPECT_EQ("does not have address that is anything",
-            DescribeNegation(matcher));
-}
-
-MATCHER_P(FieldIIs, inner_matcher, "") {
-  return ExplainMatchResult(inner_matcher, arg.i, result_listener);
-}
-
-#if GTEST_HAS_RTTI
-TEST(WhenDynamicCastToTest, SameType) {
-  Derived derived;
-  derived.i = 4;
-
-  // Right type. A pointer is passed down.
-  Base* as_base_ptr = &derived;
-  EXPECT_THAT(as_base_ptr, WhenDynamicCastTo<Derived*>(Not(IsNull())));
-  EXPECT_THAT(as_base_ptr, WhenDynamicCastTo<Derived*>(Pointee(FieldIIs(4))));
-  EXPECT_THAT(as_base_ptr,
-              Not(WhenDynamicCastTo<Derived*>(Pointee(FieldIIs(5)))));
-}
-
-TEST(WhenDynamicCastToTest, WrongTypes) {
-  Base base;
-  Derived derived;
-  OtherDerived other_derived;
-
-  // Wrong types. NULL is passed.
-  EXPECT_THAT(&base, Not(WhenDynamicCastTo<Derived*>(Pointee(_))));
-  EXPECT_THAT(&base, WhenDynamicCastTo<Derived*>(IsNull()));
-  Base* as_base_ptr = &derived;
-  EXPECT_THAT(as_base_ptr, Not(WhenDynamicCastTo<OtherDerived*>(Pointee(_))));
-  EXPECT_THAT(as_base_ptr, WhenDynamicCastTo<OtherDerived*>(IsNull()));
-  as_base_ptr = &other_derived;
-  EXPECT_THAT(as_base_ptr, Not(WhenDynamicCastTo<Derived*>(Pointee(_))));
-  EXPECT_THAT(as_base_ptr, WhenDynamicCastTo<Derived*>(IsNull()));
-}
-
-TEST(WhenDynamicCastToTest, AlreadyNull) {
-  // Already NULL.
-  Base* as_base_ptr = nullptr;
-  EXPECT_THAT(as_base_ptr, WhenDynamicCastTo<Derived*>(IsNull()));
-}
-
-struct AmbiguousCastTypes {
-  class VirtualDerived : public virtual Base {};
-  class DerivedSub1 : public VirtualDerived {};
-  class DerivedSub2 : public VirtualDerived {};
-  class ManyDerivedInHierarchy : public DerivedSub1, public DerivedSub2 {};
-};
-
-TEST(WhenDynamicCastToTest, AmbiguousCast) {
-  AmbiguousCastTypes::DerivedSub1 sub1;
-  AmbiguousCastTypes::ManyDerivedInHierarchy many_derived;
-  // Multiply derived from Base. dynamic_cast<> returns NULL.
-  Base* as_base_ptr =
-      static_cast<AmbiguousCastTypes::DerivedSub1*>(&many_derived);
-  EXPECT_THAT(as_base_ptr,
-              WhenDynamicCastTo<AmbiguousCastTypes::VirtualDerived*>(IsNull()));
-  as_base_ptr = &sub1;
-  EXPECT_THAT(
-      as_base_ptr,
-      WhenDynamicCastTo<AmbiguousCastTypes::VirtualDerived*>(Not(IsNull())));
-}
-
-TEST(WhenDynamicCastToTest, Describe) {
-  Matcher<Base*> matcher = WhenDynamicCastTo<Derived*>(Pointee(_));
-  const std::string prefix =
-      "when dynamic_cast to " + internal::GetTypeName<Derived*>() + ", ";
-  EXPECT_EQ(prefix + "points to a value that is anything", Describe(matcher));
-  EXPECT_EQ(prefix + "does not point to a value that is anything",
-            DescribeNegation(matcher));
-}
-
-TEST(WhenDynamicCastToTest, Explain) {
-  Matcher<Base*> matcher = WhenDynamicCastTo<Derived*>(Pointee(_));
-  Base* null = nullptr;
-  EXPECT_THAT(Explain(matcher, null), HasSubstr("NULL"));
-  Derived derived;
-  EXPECT_TRUE(matcher.Matches(&derived));
-  EXPECT_THAT(Explain(matcher, &derived), HasSubstr("which points to "));
-
-  // With references, the matcher itself can fail. Test for that one.
-  Matcher<const Base&> ref_matcher = WhenDynamicCastTo<const OtherDerived&>(_);
-  EXPECT_THAT(Explain(ref_matcher, derived),
-              HasSubstr("which cannot be dynamic_cast"));
-}
-
-TEST(WhenDynamicCastToTest, GoodReference) {
-  Derived derived;
-  derived.i = 4;
-  Base& as_base_ref = derived;
-  EXPECT_THAT(as_base_ref, WhenDynamicCastTo<const Derived&>(FieldIIs(4)));
-  EXPECT_THAT(as_base_ref, WhenDynamicCastTo<const Derived&>(Not(FieldIIs(5))));
-}
-
-TEST(WhenDynamicCastToTest, BadReference) {
-  Derived derived;
-  Base& as_base_ref = derived;
-  EXPECT_THAT(as_base_ref, Not(WhenDynamicCastTo<const OtherDerived&>(_)));
-}
-#endif  // GTEST_HAS_RTTI
-
-// Minimal const-propagating pointer.
-template <typename T>
-class ConstPropagatingPtr {
- public:
-  typedef T element_type;
-
-  ConstPropagatingPtr() : val_() {}
-  explicit ConstPropagatingPtr(T* t) : val_(t) {}
-  ConstPropagatingPtr(const ConstPropagatingPtr& other) : val_(other.val_) {}
-
-  T* get() { return val_; }
-  T& operator*() { return *val_; }
-  // Most smart pointers return non-const T* and T& from the next methods.
-  const T* get() const { return val_; }
-  const T& operator*() const { return *val_; }
-
- private:
-  T* val_;
-};
-
-TEST(PointeeTest, WorksWithConstPropagatingPointers) {
-  const Matcher< ConstPropagatingPtr<int> > m = Pointee(Lt(5));
-  int three = 3;
-  const ConstPropagatingPtr<int> co(&three);
-  ConstPropagatingPtr<int> o(&three);
-  EXPECT_TRUE(m.Matches(o));
-  EXPECT_TRUE(m.Matches(co));
-  *o = 6;
-  EXPECT_FALSE(m.Matches(o));
-  EXPECT_FALSE(m.Matches(ConstPropagatingPtr<int>()));
-}
-
-TEST(PointeeTest, NeverMatchesNull) {
-  const Matcher<const char*> m = Pointee(_);
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-// Tests that we can write Pointee(value) instead of Pointee(Eq(value)).
-TEST(PointeeTest, MatchesAgainstAValue) {
-  const Matcher<int*> m = Pointee(5);
-
-  int n = 5;
-  EXPECT_TRUE(m.Matches(&n));
-  n = -1;
-  EXPECT_FALSE(m.Matches(&n));
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-TEST(PointeeTest, CanDescribeSelf) {
-  const Matcher<int*> m = Pointee(Gt(3));
-  EXPECT_EQ("points to a value that is > 3", Describe(m));
-  EXPECT_EQ("does not point to a value that is > 3",
-            DescribeNegation(m));
-}
-
-TEST(PointeeTest, CanExplainMatchResult) {
-  const Matcher<const std::string*> m = Pointee(StartsWith("Hi"));
-
-  EXPECT_EQ("", Explain(m, static_cast<const std::string*>(nullptr)));
-
-  const Matcher<long*> m2 = Pointee(GreaterThan(1));  // NOLINT
-  long n = 3;  // NOLINT
-  EXPECT_EQ("which points to 3" + OfType("long") + ", which is 2 more than 1",
-            Explain(m2, &n));
-}
-
-TEST(PointeeTest, AlwaysExplainsPointee) {
-  const Matcher<int*> m = Pointee(0);
-  int n = 42;
-  EXPECT_EQ("which points to 42" + OfType("int"), Explain(m, &n));
-}
-
-// An uncopyable class.
-class Uncopyable {
- public:
-  Uncopyable() : value_(-1) {}
-  explicit Uncopyable(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
-  void set_value(int i) { value_ = i; }
-
- private:
-  int value_;
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Uncopyable);
-};
-
-// Returns true if and only if x.value() is positive.
-bool ValueIsPositive(const Uncopyable& x) { return x.value() > 0; }
-
-MATCHER_P(UncopyableIs, inner_matcher, "") {
-  return ExplainMatchResult(inner_matcher, arg.value(), result_listener);
-}
-
-// A user-defined struct for testing Field().
-struct AStruct {
-  AStruct() : x(0), y(1.0), z(5), p(nullptr) {}
-  AStruct(const AStruct& rhs)
-      : x(rhs.x), y(rhs.y), z(rhs.z.value()), p(rhs.p) {}
-
-  int x;           // A non-const field.
-  const double y;  // A const field.
-  Uncopyable z;    // An uncopyable field.
-  const char* p;   // A pointer field.
-};
-
-// A derived struct for testing Field().
-struct DerivedStruct : public AStruct {
-  char ch;
-};
-
-// Tests that Field(&Foo::field, ...) works when field is non-const.
-TEST(FieldTest, WorksForNonConstField) {
-  Matcher<AStruct> m = Field(&AStruct::x, Ge(0));
-  Matcher<AStruct> m_with_name = Field("x", &AStruct::x, Ge(0));
-
-  AStruct a;
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_TRUE(m_with_name.Matches(a));
-  a.x = -1;
-  EXPECT_FALSE(m.Matches(a));
-  EXPECT_FALSE(m_with_name.Matches(a));
-}
-
-// Tests that Field(&Foo::field, ...) works when field is const.
-TEST(FieldTest, WorksForConstField) {
-  AStruct a;
-
-  Matcher<AStruct> m = Field(&AStruct::y, Ge(0.0));
-  Matcher<AStruct> m_with_name = Field("y", &AStruct::y, Ge(0.0));
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_TRUE(m_with_name.Matches(a));
-  m = Field(&AStruct::y, Le(0.0));
-  m_with_name = Field("y", &AStruct::y, Le(0.0));
-  EXPECT_FALSE(m.Matches(a));
-  EXPECT_FALSE(m_with_name.Matches(a));
-}
-
-// Tests that Field(&Foo::field, ...) works when field is not copyable.
-TEST(FieldTest, WorksForUncopyableField) {
-  AStruct a;
-
-  Matcher<AStruct> m = Field(&AStruct::z, Truly(ValueIsPositive));
-  EXPECT_TRUE(m.Matches(a));
-  m = Field(&AStruct::z, Not(Truly(ValueIsPositive)));
-  EXPECT_FALSE(m.Matches(a));
-}
-
-// Tests that Field(&Foo::field, ...) works when field is a pointer.
-TEST(FieldTest, WorksForPointerField) {
-  // Matching against NULL.
-  Matcher<AStruct> m = Field(&AStruct::p, static_cast<const char*>(nullptr));
-  AStruct a;
-  EXPECT_TRUE(m.Matches(a));
-  a.p = "hi";
-  EXPECT_FALSE(m.Matches(a));
-
-  // Matching a pointer that is not NULL.
-  m = Field(&AStruct::p, StartsWith("hi"));
-  a.p = "hill";
-  EXPECT_TRUE(m.Matches(a));
-  a.p = "hole";
-  EXPECT_FALSE(m.Matches(a));
-}
-
-// Tests that Field() works when the object is passed by reference.
-TEST(FieldTest, WorksForByRefArgument) {
-  Matcher<const AStruct&> m = Field(&AStruct::x, Ge(0));
-
-  AStruct a;
-  EXPECT_TRUE(m.Matches(a));
-  a.x = -1;
-  EXPECT_FALSE(m.Matches(a));
-}
-
-// Tests that Field(&Foo::field, ...) works when the argument's type
-// is a sub-type of Foo.
-TEST(FieldTest, WorksForArgumentOfSubType) {
-  // Note that the matcher expects DerivedStruct but we say AStruct
-  // inside Field().
-  Matcher<const DerivedStruct&> m = Field(&AStruct::x, Ge(0));
-
-  DerivedStruct d;
-  EXPECT_TRUE(m.Matches(d));
-  d.x = -1;
-  EXPECT_FALSE(m.Matches(d));
-}
-
-// Tests that Field(&Foo::field, m) works when field's type and m's
-// argument type are compatible but not the same.
-TEST(FieldTest, WorksForCompatibleMatcherType) {
-  // The field is an int, but the inner matcher expects a signed char.
-  Matcher<const AStruct&> m = Field(&AStruct::x,
-                                    Matcher<signed char>(Ge(0)));
-
-  AStruct a;
-  EXPECT_TRUE(m.Matches(a));
-  a.x = -1;
-  EXPECT_FALSE(m.Matches(a));
-}
-
-// Tests that Field() can describe itself.
-TEST(FieldTest, CanDescribeSelf) {
-  Matcher<const AStruct&> m = Field(&AStruct::x, Ge(0));
-
-  EXPECT_EQ("is an object whose given field is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose given field isn't >= 0", DescribeNegation(m));
-}
-
-TEST(FieldTest, CanDescribeSelfWithFieldName) {
-  Matcher<const AStruct&> m = Field("field_name", &AStruct::x, Ge(0));
-
-  EXPECT_EQ("is an object whose field `field_name` is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose field `field_name` isn't >= 0",
-            DescribeNegation(m));
-}
-
-// Tests that Field() can explain the match result.
-TEST(FieldTest, CanExplainMatchResult) {
-  Matcher<const AStruct&> m = Field(&AStruct::x, Ge(0));
-
-  AStruct a;
-  a.x = 1;
-  EXPECT_EQ("whose given field is 1" + OfType("int"), Explain(m, a));
-
-  m = Field(&AStruct::x, GreaterThan(0));
-  EXPECT_EQ(
-      "whose given field is 1" + OfType("int") + ", which is 1 more than 0",
-      Explain(m, a));
-}
-
-TEST(FieldTest, CanExplainMatchResultWithFieldName) {
-  Matcher<const AStruct&> m = Field("field_name", &AStruct::x, Ge(0));
-
-  AStruct a;
-  a.x = 1;
-  EXPECT_EQ("whose field `field_name` is 1" + OfType("int"), Explain(m, a));
-
-  m = Field("field_name", &AStruct::x, GreaterThan(0));
-  EXPECT_EQ("whose field `field_name` is 1" + OfType("int") +
-                ", which is 1 more than 0",
-            Explain(m, a));
-}
-
-// Tests that Field() works when the argument is a pointer to const.
-TEST(FieldForPointerTest, WorksForPointerToConst) {
-  Matcher<const AStruct*> m = Field(&AStruct::x, Ge(0));
-
-  AStruct a;
-  EXPECT_TRUE(m.Matches(&a));
-  a.x = -1;
-  EXPECT_FALSE(m.Matches(&a));
-}
-
-// Tests that Field() works when the argument is a pointer to non-const.
-TEST(FieldForPointerTest, WorksForPointerToNonConst) {
-  Matcher<AStruct*> m = Field(&AStruct::x, Ge(0));
-
-  AStruct a;
-  EXPECT_TRUE(m.Matches(&a));
-  a.x = -1;
-  EXPECT_FALSE(m.Matches(&a));
-}
-
-// Tests that Field() works when the argument is a reference to a const pointer.
-TEST(FieldForPointerTest, WorksForReferenceToConstPointer) {
-  Matcher<AStruct* const&> m = Field(&AStruct::x, Ge(0));
-
-  AStruct a;
-  EXPECT_TRUE(m.Matches(&a));
-  a.x = -1;
-  EXPECT_FALSE(m.Matches(&a));
-}
-
-// Tests that Field() does not match the NULL pointer.
-TEST(FieldForPointerTest, DoesNotMatchNull) {
-  Matcher<const AStruct*> m = Field(&AStruct::x, _);
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-// Tests that Field(&Foo::field, ...) works when the argument's type
-// is a sub-type of const Foo*.
-TEST(FieldForPointerTest, WorksForArgumentOfSubType) {
-  // Note that the matcher expects DerivedStruct but we say AStruct
-  // inside Field().
-  Matcher<DerivedStruct*> m = Field(&AStruct::x, Ge(0));
-
-  DerivedStruct d;
-  EXPECT_TRUE(m.Matches(&d));
-  d.x = -1;
-  EXPECT_FALSE(m.Matches(&d));
-}
-
-// Tests that Field() can describe itself when used to match a pointer.
-TEST(FieldForPointerTest, CanDescribeSelf) {
-  Matcher<const AStruct*> m = Field(&AStruct::x, Ge(0));
-
-  EXPECT_EQ("is an object whose given field is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose given field isn't >= 0", DescribeNegation(m));
-}
-
-TEST(FieldForPointerTest, CanDescribeSelfWithFieldName) {
-  Matcher<const AStruct*> m = Field("field_name", &AStruct::x, Ge(0));
-
-  EXPECT_EQ("is an object whose field `field_name` is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose field `field_name` isn't >= 0",
-            DescribeNegation(m));
-}
-
-// Tests that Field() can explain the result of matching a pointer.
-TEST(FieldForPointerTest, CanExplainMatchResult) {
-  Matcher<const AStruct*> m = Field(&AStruct::x, Ge(0));
-
-  AStruct a;
-  a.x = 1;
-  EXPECT_EQ("", Explain(m, static_cast<const AStruct*>(nullptr)));
-  EXPECT_EQ("which points to an object whose given field is 1" + OfType("int"),
-            Explain(m, &a));
-
-  m = Field(&AStruct::x, GreaterThan(0));
-  EXPECT_EQ("which points to an object whose given field is 1" + OfType("int") +
-            ", which is 1 more than 0", Explain(m, &a));
-}
-
-TEST(FieldForPointerTest, CanExplainMatchResultWithFieldName) {
-  Matcher<const AStruct*> m = Field("field_name", &AStruct::x, Ge(0));
-
-  AStruct a;
-  a.x = 1;
-  EXPECT_EQ("", Explain(m, static_cast<const AStruct*>(nullptr)));
-  EXPECT_EQ(
-      "which points to an object whose field `field_name` is 1" + OfType("int"),
-      Explain(m, &a));
-
-  m = Field("field_name", &AStruct::x, GreaterThan(0));
-  EXPECT_EQ("which points to an object whose field `field_name` is 1" +
-                OfType("int") + ", which is 1 more than 0",
-            Explain(m, &a));
-}
-
-// A user-defined class for testing Property().
-class AClass {
- public:
-  AClass() : n_(0) {}
-
-  // A getter that returns a non-reference.
-  int n() const { return n_; }
-
-  void set_n(int new_n) { n_ = new_n; }
-
-  // A getter that returns a reference to const.
-  const std::string& s() const { return s_; }
-
-  const std::string& s_ref() const & { return s_; }
-
-  void set_s(const std::string& new_s) { s_ = new_s; }
-
-  // A getter that returns a reference to non-const.
-  double& x() const { return x_; }
-
- private:
-  int n_;
-  std::string s_;
-
-  static double x_;
-};
-
-double AClass::x_ = 0.0;
-
-// A derived class for testing Property().
-class DerivedClass : public AClass {
- public:
-  int k() const { return k_; }
- private:
-  int k_;
-};
-
-// Tests that Property(&Foo::property, ...) works when property()
-// returns a non-reference.
-TEST(PropertyTest, WorksForNonReferenceProperty) {
-  Matcher<const AClass&> m = Property(&AClass::n, Ge(0));
-  Matcher<const AClass&> m_with_name = Property("n", &AClass::n, Ge(0));
-
-  AClass a;
-  a.set_n(1);
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_TRUE(m_with_name.Matches(a));
-
-  a.set_n(-1);
-  EXPECT_FALSE(m.Matches(a));
-  EXPECT_FALSE(m_with_name.Matches(a));
-}
-
-// Tests that Property(&Foo::property, ...) works when property()
-// returns a reference to const.
-TEST(PropertyTest, WorksForReferenceToConstProperty) {
-  Matcher<const AClass&> m = Property(&AClass::s, StartsWith("hi"));
-  Matcher<const AClass&> m_with_name =
-      Property("s", &AClass::s, StartsWith("hi"));
-
-  AClass a;
-  a.set_s("hill");
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_TRUE(m_with_name.Matches(a));
-
-  a.set_s("hole");
-  EXPECT_FALSE(m.Matches(a));
-  EXPECT_FALSE(m_with_name.Matches(a));
-}
-
-// Tests that Property(&Foo::property, ...) works when property() is
-// ref-qualified.
-TEST(PropertyTest, WorksForRefQualifiedProperty) {
-  Matcher<const AClass&> m = Property(&AClass::s_ref, StartsWith("hi"));
-  Matcher<const AClass&> m_with_name =
-      Property("s", &AClass::s_ref, StartsWith("hi"));
-
-  AClass a;
-  a.set_s("hill");
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_TRUE(m_with_name.Matches(a));
-
-  a.set_s("hole");
-  EXPECT_FALSE(m.Matches(a));
-  EXPECT_FALSE(m_with_name.Matches(a));
-}
-
-// Tests that Property(&Foo::property, ...) works when property()
-// returns a reference to non-const.
-TEST(PropertyTest, WorksForReferenceToNonConstProperty) {
-  double x = 0.0;
-  AClass a;
-
-  Matcher<const AClass&> m = Property(&AClass::x, Ref(x));
-  EXPECT_FALSE(m.Matches(a));
-
-  m = Property(&AClass::x, Not(Ref(x)));
-  EXPECT_TRUE(m.Matches(a));
-}
-
-// Tests that Property(&Foo::property, ...) works when the argument is
-// passed by value.
-TEST(PropertyTest, WorksForByValueArgument) {
-  Matcher<AClass> m = Property(&AClass::s, StartsWith("hi"));
-
-  AClass a;
-  a.set_s("hill");
-  EXPECT_TRUE(m.Matches(a));
-
-  a.set_s("hole");
-  EXPECT_FALSE(m.Matches(a));
-}
-
-// Tests that Property(&Foo::property, ...) works when the argument's
-// type is a sub-type of Foo.
-TEST(PropertyTest, WorksForArgumentOfSubType) {
-  // The matcher expects a DerivedClass, but inside the Property() we
-  // say AClass.
-  Matcher<const DerivedClass&> m = Property(&AClass::n, Ge(0));
-
-  DerivedClass d;
-  d.set_n(1);
-  EXPECT_TRUE(m.Matches(d));
-
-  d.set_n(-1);
-  EXPECT_FALSE(m.Matches(d));
-}
-
-// Tests that Property(&Foo::property, m) works when property()'s type
-// and m's argument type are compatible but different.
-TEST(PropertyTest, WorksForCompatibleMatcherType) {
-  // n() returns an int but the inner matcher expects a signed char.
-  Matcher<const AClass&> m = Property(&AClass::n,
-                                      Matcher<signed char>(Ge(0)));
-
-  Matcher<const AClass&> m_with_name =
-      Property("n", &AClass::n, Matcher<signed char>(Ge(0)));
-
-  AClass a;
-  EXPECT_TRUE(m.Matches(a));
-  EXPECT_TRUE(m_with_name.Matches(a));
-  a.set_n(-1);
-  EXPECT_FALSE(m.Matches(a));
-  EXPECT_FALSE(m_with_name.Matches(a));
-}
-
-// Tests that Property() can describe itself.
-TEST(PropertyTest, CanDescribeSelf) {
-  Matcher<const AClass&> m = Property(&AClass::n, Ge(0));
-
-  EXPECT_EQ("is an object whose given property is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose given property isn't >= 0",
-            DescribeNegation(m));
-}
-
-TEST(PropertyTest, CanDescribeSelfWithPropertyName) {
-  Matcher<const AClass&> m = Property("fancy_name", &AClass::n, Ge(0));
-
-  EXPECT_EQ("is an object whose property `fancy_name` is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose property `fancy_name` isn't >= 0",
-            DescribeNegation(m));
-}
-
-// Tests that Property() can explain the match result.
-TEST(PropertyTest, CanExplainMatchResult) {
-  Matcher<const AClass&> m = Property(&AClass::n, Ge(0));
-
-  AClass a;
-  a.set_n(1);
-  EXPECT_EQ("whose given property is 1" + OfType("int"), Explain(m, a));
-
-  m = Property(&AClass::n, GreaterThan(0));
-  EXPECT_EQ(
-      "whose given property is 1" + OfType("int") + ", which is 1 more than 0",
-      Explain(m, a));
-}
-
-TEST(PropertyTest, CanExplainMatchResultWithPropertyName) {
-  Matcher<const AClass&> m = Property("fancy_name", &AClass::n, Ge(0));
-
-  AClass a;
-  a.set_n(1);
-  EXPECT_EQ("whose property `fancy_name` is 1" + OfType("int"), Explain(m, a));
-
-  m = Property("fancy_name", &AClass::n, GreaterThan(0));
-  EXPECT_EQ("whose property `fancy_name` is 1" + OfType("int") +
-                ", which is 1 more than 0",
-            Explain(m, a));
-}
-
-// Tests that Property() works when the argument is a pointer to const.
-TEST(PropertyForPointerTest, WorksForPointerToConst) {
-  Matcher<const AClass*> m = Property(&AClass::n, Ge(0));
-
-  AClass a;
-  a.set_n(1);
-  EXPECT_TRUE(m.Matches(&a));
-
-  a.set_n(-1);
-  EXPECT_FALSE(m.Matches(&a));
-}
-
-// Tests that Property() works when the argument is a pointer to non-const.
-TEST(PropertyForPointerTest, WorksForPointerToNonConst) {
-  Matcher<AClass*> m = Property(&AClass::s, StartsWith("hi"));
-
-  AClass a;
-  a.set_s("hill");
-  EXPECT_TRUE(m.Matches(&a));
-
-  a.set_s("hole");
-  EXPECT_FALSE(m.Matches(&a));
-}
-
-// Tests that Property() works when the argument is a reference to a
-// const pointer.
-TEST(PropertyForPointerTest, WorksForReferenceToConstPointer) {
-  Matcher<AClass* const&> m = Property(&AClass::s, StartsWith("hi"));
-
-  AClass a;
-  a.set_s("hill");
-  EXPECT_TRUE(m.Matches(&a));
-
-  a.set_s("hole");
-  EXPECT_FALSE(m.Matches(&a));
-}
-
-// Tests that Property() does not match the NULL pointer.
-TEST(PropertyForPointerTest, WorksForReferenceToNonConstProperty) {
-  Matcher<const AClass*> m = Property(&AClass::x, _);
-  EXPECT_FALSE(m.Matches(nullptr));
-}
-
-// Tests that Property(&Foo::property, ...) works when the argument's
-// type is a sub-type of const Foo*.
-TEST(PropertyForPointerTest, WorksForArgumentOfSubType) {
-  // The matcher expects a DerivedClass, but inside the Property() we
-  // say AClass.
-  Matcher<const DerivedClass*> m = Property(&AClass::n, Ge(0));
-
-  DerivedClass d;
-  d.set_n(1);
-  EXPECT_TRUE(m.Matches(&d));
-
-  d.set_n(-1);
-  EXPECT_FALSE(m.Matches(&d));
-}
-
-// Tests that Property() can describe itself when used to match a pointer.
-TEST(PropertyForPointerTest, CanDescribeSelf) {
-  Matcher<const AClass*> m = Property(&AClass::n, Ge(0));
-
-  EXPECT_EQ("is an object whose given property is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose given property isn't >= 0",
-            DescribeNegation(m));
-}
-
-TEST(PropertyForPointerTest, CanDescribeSelfWithPropertyDescription) {
-  Matcher<const AClass*> m = Property("fancy_name", &AClass::n, Ge(0));
-
-  EXPECT_EQ("is an object whose property `fancy_name` is >= 0", Describe(m));
-  EXPECT_EQ("is an object whose property `fancy_name` isn't >= 0",
-            DescribeNegation(m));
-}
-
-// Tests that Property() can explain the result of matching a pointer.
-TEST(PropertyForPointerTest, CanExplainMatchResult) {
-  Matcher<const AClass*> m = Property(&AClass::n, Ge(0));
-
-  AClass a;
-  a.set_n(1);
-  EXPECT_EQ("", Explain(m, static_cast<const AClass*>(nullptr)));
-  EXPECT_EQ(
-      "which points to an object whose given property is 1" + OfType("int"),
-      Explain(m, &a));
-
-  m = Property(&AClass::n, GreaterThan(0));
-  EXPECT_EQ("which points to an object whose given property is 1" +
-            OfType("int") + ", which is 1 more than 0",
-            Explain(m, &a));
-}
-
-TEST(PropertyForPointerTest, CanExplainMatchResultWithPropertyName) {
-  Matcher<const AClass*> m = Property("fancy_name", &AClass::n, Ge(0));
-
-  AClass a;
-  a.set_n(1);
-  EXPECT_EQ("", Explain(m, static_cast<const AClass*>(nullptr)));
-  EXPECT_EQ("which points to an object whose property `fancy_name` is 1" +
-                OfType("int"),
-            Explain(m, &a));
-
-  m = Property("fancy_name", &AClass::n, GreaterThan(0));
-  EXPECT_EQ("which points to an object whose property `fancy_name` is 1" +
-                OfType("int") + ", which is 1 more than 0",
-            Explain(m, &a));
-}
-
-// Tests ResultOf.
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f is a
-// function pointer.
-std::string IntToStringFunction(int input) {
-  return input == 1 ? "foo" : "bar";
-}
-
-TEST(ResultOfTest, WorksForFunctionPointers) {
-  Matcher<int> matcher = ResultOf(&IntToStringFunction, Eq(std::string("foo")));
-
-  EXPECT_TRUE(matcher.Matches(1));
-  EXPECT_FALSE(matcher.Matches(2));
-}
-
-// Tests that ResultOf() can describe itself.
-TEST(ResultOfTest, CanDescribeItself) {
-  Matcher<int> matcher = ResultOf(&IntToStringFunction, StrEq("foo"));
-
-  EXPECT_EQ("is mapped by the given callable to a value that "
-            "is equal to \"foo\"", Describe(matcher));
-  EXPECT_EQ("is mapped by the given callable to a value that "
-            "isn't equal to \"foo\"", DescribeNegation(matcher));
-}
-
-// Tests that ResultOf() can explain the match result.
-int IntFunction(int input) { return input == 42 ? 80 : 90; }
-
-TEST(ResultOfTest, CanExplainMatchResult) {
-  Matcher<int> matcher = ResultOf(&IntFunction, Ge(85));
-  EXPECT_EQ("which is mapped by the given callable to 90" + OfType("int"),
-            Explain(matcher, 36));
-
-  matcher = ResultOf(&IntFunction, GreaterThan(85));
-  EXPECT_EQ("which is mapped by the given callable to 90" + OfType("int") +
-            ", which is 5 more than 85", Explain(matcher, 36));
-}
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f(x)
-// returns a non-reference.
-TEST(ResultOfTest, WorksForNonReferenceResults) {
-  Matcher<int> matcher = ResultOf(&IntFunction, Eq(80));
-
-  EXPECT_TRUE(matcher.Matches(42));
-  EXPECT_FALSE(matcher.Matches(36));
-}
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f(x)
-// returns a reference to non-const.
-double& DoubleFunction(double& input) { return input; }  // NOLINT
-
-Uncopyable& RefUncopyableFunction(Uncopyable& obj) {  // NOLINT
-  return obj;
-}
-
-TEST(ResultOfTest, WorksForReferenceToNonConstResults) {
-  double x = 3.14;
-  double x2 = x;
-  Matcher<double&> matcher = ResultOf(&DoubleFunction, Ref(x));
-
-  EXPECT_TRUE(matcher.Matches(x));
-  EXPECT_FALSE(matcher.Matches(x2));
-
-  // Test that ResultOf works with uncopyable objects
-  Uncopyable obj(0);
-  Uncopyable obj2(0);
-  Matcher<Uncopyable&> matcher2 =
-      ResultOf(&RefUncopyableFunction, Ref(obj));
-
-  EXPECT_TRUE(matcher2.Matches(obj));
-  EXPECT_FALSE(matcher2.Matches(obj2));
-}
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f(x)
-// returns a reference to const.
-const std::string& StringFunction(const std::string& input) { return input; }
-
-TEST(ResultOfTest, WorksForReferenceToConstResults) {
-  std::string s = "foo";
-  std::string s2 = s;
-  Matcher<const std::string&> matcher = ResultOf(&StringFunction, Ref(s));
-
-  EXPECT_TRUE(matcher.Matches(s));
-  EXPECT_FALSE(matcher.Matches(s2));
-}
-
-// Tests that ResultOf(f, m) works when f(x) and m's
-// argument types are compatible but different.
-TEST(ResultOfTest, WorksForCompatibleMatcherTypes) {
-  // IntFunction() returns int but the inner matcher expects a signed char.
-  Matcher<int> matcher = ResultOf(IntFunction, Matcher<signed char>(Ge(85)));
-
-  EXPECT_TRUE(matcher.Matches(36));
-  EXPECT_FALSE(matcher.Matches(42));
-}
-
-// Tests that the program aborts when ResultOf is passed
-// a NULL function pointer.
-TEST(ResultOfDeathTest, DiesOnNullFunctionPointers) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      ResultOf(static_cast<std::string (*)(int dummy)>(nullptr),
-               Eq(std::string("foo"))),
-      "NULL function pointer is passed into ResultOf\\(\\)\\.");
-}
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f is a
-// function reference.
-TEST(ResultOfTest, WorksForFunctionReferences) {
-  Matcher<int> matcher = ResultOf(IntToStringFunction, StrEq("foo"));
-  EXPECT_TRUE(matcher.Matches(1));
-  EXPECT_FALSE(matcher.Matches(2));
-}
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f is a
-// function object.
-struct Functor {
-  std::string operator()(int input) const {
-    return IntToStringFunction(input);
-  }
-};
-
-TEST(ResultOfTest, WorksForFunctors) {
-  Matcher<int> matcher = ResultOf(Functor(), Eq(std::string("foo")));
-
-  EXPECT_TRUE(matcher.Matches(1));
-  EXPECT_FALSE(matcher.Matches(2));
-}
-
-// Tests that ResultOf(f, ...) compiles and works as expected when f is a
-// functor with more than one operator() defined. ResultOf() must work
-// for each defined operator().
-struct PolymorphicFunctor {
-  typedef int result_type;
-  int operator()(int n) { return n; }
-  int operator()(const char* s) { return static_cast<int>(strlen(s)); }
-  std::string operator()(int *p) { return p ? "good ptr" : "null"; }
-};
-
-TEST(ResultOfTest, WorksForPolymorphicFunctors) {
-  Matcher<int> matcher_int = ResultOf(PolymorphicFunctor(), Ge(5));
-
-  EXPECT_TRUE(matcher_int.Matches(10));
-  EXPECT_FALSE(matcher_int.Matches(2));
-
-  Matcher<const char*> matcher_string = ResultOf(PolymorphicFunctor(), Ge(5));
-
-  EXPECT_TRUE(matcher_string.Matches("long string"));
-  EXPECT_FALSE(matcher_string.Matches("shrt"));
-}
-
-TEST(ResultOfTest, WorksForPolymorphicFunctorsIgnoringResultType) {
-  Matcher<int*> matcher = ResultOf(PolymorphicFunctor(), "good ptr");
-
-  int n = 0;
-  EXPECT_TRUE(matcher.Matches(&n));
-  EXPECT_FALSE(matcher.Matches(nullptr));
-}
-
-TEST(ResultOfTest, WorksForLambdas) {
-  Matcher<int> matcher = ResultOf(
-      [](int str_len) {
-        return std::string(static_cast<size_t>(str_len), 'x');
-      },
-      "xxx");
-  EXPECT_TRUE(matcher.Matches(3));
-  EXPECT_FALSE(matcher.Matches(1));
-}
-
-TEST(ResultOfTest, WorksForNonCopyableArguments) {
-  Matcher<std::unique_ptr<int>> matcher = ResultOf(
-      [](const std::unique_ptr<int>& str_len) {
-        return std::string(static_cast<size_t>(*str_len), 'x');
-      },
-      "xxx");
-  EXPECT_TRUE(matcher.Matches(std::unique_ptr<int>(new int(3))));
-  EXPECT_FALSE(matcher.Matches(std::unique_ptr<int>(new int(1))));
-}
-
-const int* ReferencingFunction(const int& n) { return &n; }
-
-struct ReferencingFunctor {
-  typedef const int* result_type;
-  result_type operator()(const int& n) { return &n; }
-};
-
-TEST(ResultOfTest, WorksForReferencingCallables) {
-  const int n = 1;
-  const int n2 = 1;
-  Matcher<const int&> matcher2 = ResultOf(ReferencingFunction, Eq(&n));
-  EXPECT_TRUE(matcher2.Matches(n));
-  EXPECT_FALSE(matcher2.Matches(n2));
-
-  Matcher<const int&> matcher3 = ResultOf(ReferencingFunctor(), Eq(&n));
-  EXPECT_TRUE(matcher3.Matches(n));
-  EXPECT_FALSE(matcher3.Matches(n2));
-}
-
-class DivisibleByImpl {
- public:
-  explicit DivisibleByImpl(int a_divider) : divider_(a_divider) {}
-
-  // For testing using ExplainMatchResultTo() with polymorphic matchers.
-  template <typename T>
-  bool MatchAndExplain(const T& n, MatchResultListener* listener) const {
-    *listener << "which is " << (n % divider_) << " modulo "
-              << divider_;
-    return (n % divider_) == 0;
-  }
-
-  void DescribeTo(ostream* os) const {
-    *os << "is divisible by " << divider_;
-  }
-
-  void DescribeNegationTo(ostream* os) const {
-    *os << "is not divisible by " << divider_;
-  }
-
-  void set_divider(int a_divider) { divider_ = a_divider; }
-  int divider() const { return divider_; }
-
- private:
-  int divider_;
-};
-
-PolymorphicMatcher<DivisibleByImpl> DivisibleBy(int n) {
-  return MakePolymorphicMatcher(DivisibleByImpl(n));
-}
-
-// Tests that when AllOf() fails, only the first failing matcher is
-// asked to explain why.
-TEST(ExplainMatchResultTest, AllOf_False_False) {
-  const Matcher<int> m = AllOf(DivisibleBy(4), DivisibleBy(3));
-  EXPECT_EQ("which is 1 modulo 4", Explain(m, 5));
-}
-
-// Tests that when AllOf() fails, only the first failing matcher is
-// asked to explain why.
-TEST(ExplainMatchResultTest, AllOf_False_True) {
-  const Matcher<int> m = AllOf(DivisibleBy(4), DivisibleBy(3));
-  EXPECT_EQ("which is 2 modulo 4", Explain(m, 6));
-}
-
-// Tests that when AllOf() fails, only the first failing matcher is
-// asked to explain why.
-TEST(ExplainMatchResultTest, AllOf_True_False) {
-  const Matcher<int> m = AllOf(Ge(1), DivisibleBy(3));
-  EXPECT_EQ("which is 2 modulo 3", Explain(m, 5));
-}
-
-// Tests that when AllOf() succeeds, all matchers are asked to explain
-// why.
-TEST(ExplainMatchResultTest, AllOf_True_True) {
-  const Matcher<int> m = AllOf(DivisibleBy(2), DivisibleBy(3));
-  EXPECT_EQ("which is 0 modulo 2, and which is 0 modulo 3", Explain(m, 6));
-}
-
-TEST(ExplainMatchResultTest, AllOf_True_True_2) {
-  const Matcher<int> m = AllOf(Ge(2), Le(3));
-  EXPECT_EQ("", Explain(m, 2));
-}
-
-TEST(ExplainmatcherResultTest, MonomorphicMatcher) {
-  const Matcher<int> m = GreaterThan(5);
-  EXPECT_EQ("which is 1 more than 5", Explain(m, 6));
-}
-
-// The following two tests verify that values without a public copy
-// ctor can be used as arguments to matchers like Eq(), Ge(), and etc
-// with the help of ByRef().
-
-class NotCopyable {
- public:
-  explicit NotCopyable(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
-
-  bool operator==(const NotCopyable& rhs) const {
-    return value() == rhs.value();
-  }
-
-  bool operator>=(const NotCopyable& rhs) const {
-    return value() >= rhs.value();
-  }
- private:
-  int value_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(NotCopyable);
-};
-
-TEST(ByRefTest, AllowsNotCopyableConstValueInMatchers) {
-  const NotCopyable const_value1(1);
-  const Matcher<const NotCopyable&> m = Eq(ByRef(const_value1));
-
-  const NotCopyable n1(1), n2(2);
-  EXPECT_TRUE(m.Matches(n1));
-  EXPECT_FALSE(m.Matches(n2));
-}
-
-TEST(ByRefTest, AllowsNotCopyableValueInMatchers) {
-  NotCopyable value2(2);
-  const Matcher<NotCopyable&> m = Ge(ByRef(value2));
-
-  NotCopyable n1(1), n2(2);
-  EXPECT_FALSE(m.Matches(n1));
-  EXPECT_TRUE(m.Matches(n2));
-}
-
-TEST(IsEmptyTest, ImplementsIsEmpty) {
-  vector<int> container;
-  EXPECT_THAT(container, IsEmpty());
-  container.push_back(0);
-  EXPECT_THAT(container, Not(IsEmpty()));
-  container.push_back(1);
-  EXPECT_THAT(container, Not(IsEmpty()));
-}
-
-TEST(IsEmptyTest, WorksWithString) {
-  std::string text;
-  EXPECT_THAT(text, IsEmpty());
-  text = "foo";
-  EXPECT_THAT(text, Not(IsEmpty()));
-  text = std::string("\0", 1);
-  EXPECT_THAT(text, Not(IsEmpty()));
-}
-
-TEST(IsEmptyTest, CanDescribeSelf) {
-  Matcher<vector<int> > m = IsEmpty();
-  EXPECT_EQ("is empty", Describe(m));
-  EXPECT_EQ("isn't empty", DescribeNegation(m));
-}
-
-TEST(IsEmptyTest, ExplainsResult) {
-  Matcher<vector<int> > m = IsEmpty();
-  vector<int> container;
-  EXPECT_EQ("", Explain(m, container));
-  container.push_back(0);
-  EXPECT_EQ("whose size is 1", Explain(m, container));
-}
-
-TEST(IsEmptyTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(IsEmpty()));
-  helper.Call({});
-}
-
-TEST(IsTrueTest, IsTrueIsFalse) {
-  EXPECT_THAT(true, IsTrue());
-  EXPECT_THAT(false, IsFalse());
-  EXPECT_THAT(true, Not(IsFalse()));
-  EXPECT_THAT(false, Not(IsTrue()));
-  EXPECT_THAT(0, Not(IsTrue()));
-  EXPECT_THAT(0, IsFalse());
-  EXPECT_THAT(nullptr, Not(IsTrue()));
-  EXPECT_THAT(nullptr, IsFalse());
-  EXPECT_THAT(-1, IsTrue());
-  EXPECT_THAT(-1, Not(IsFalse()));
-  EXPECT_THAT(1, IsTrue());
-  EXPECT_THAT(1, Not(IsFalse()));
-  EXPECT_THAT(2, IsTrue());
-  EXPECT_THAT(2, Not(IsFalse()));
-  int a = 42;
-  EXPECT_THAT(a, IsTrue());
-  EXPECT_THAT(a, Not(IsFalse()));
-  EXPECT_THAT(&a, IsTrue());
-  EXPECT_THAT(&a, Not(IsFalse()));
-  EXPECT_THAT(false, Not(IsTrue()));
-  EXPECT_THAT(true, Not(IsFalse()));
-  EXPECT_THAT(std::true_type(), IsTrue());
-  EXPECT_THAT(std::true_type(), Not(IsFalse()));
-  EXPECT_THAT(std::false_type(), IsFalse());
-  EXPECT_THAT(std::false_type(), Not(IsTrue()));
-  EXPECT_THAT(nullptr, Not(IsTrue()));
-  EXPECT_THAT(nullptr, IsFalse());
-  std::unique_ptr<int> null_unique;
-  std::unique_ptr<int> nonnull_unique(new int(0));
-  EXPECT_THAT(null_unique, Not(IsTrue()));
-  EXPECT_THAT(null_unique, IsFalse());
-  EXPECT_THAT(nonnull_unique, IsTrue());
-  EXPECT_THAT(nonnull_unique, Not(IsFalse()));
-}
-
-TEST(SizeIsTest, ImplementsSizeIs) {
-  vector<int> container;
-  EXPECT_THAT(container, SizeIs(0));
-  EXPECT_THAT(container, Not(SizeIs(1)));
-  container.push_back(0);
-  EXPECT_THAT(container, Not(SizeIs(0)));
-  EXPECT_THAT(container, SizeIs(1));
-  container.push_back(0);
-  EXPECT_THAT(container, Not(SizeIs(0)));
-  EXPECT_THAT(container, SizeIs(2));
-}
-
-TEST(SizeIsTest, WorksWithMap) {
-  map<std::string, int> container;
-  EXPECT_THAT(container, SizeIs(0));
-  EXPECT_THAT(container, Not(SizeIs(1)));
-  container.insert(make_pair("foo", 1));
-  EXPECT_THAT(container, Not(SizeIs(0)));
-  EXPECT_THAT(container, SizeIs(1));
-  container.insert(make_pair("bar", 2));
-  EXPECT_THAT(container, Not(SizeIs(0)));
-  EXPECT_THAT(container, SizeIs(2));
-}
-
-TEST(SizeIsTest, WorksWithReferences) {
-  vector<int> container;
-  Matcher<const vector<int>&> m = SizeIs(1);
-  EXPECT_THAT(container, Not(m));
-  container.push_back(0);
-  EXPECT_THAT(container, m);
-}
-
-TEST(SizeIsTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(SizeIs(3)));
-  helper.Call(MakeUniquePtrs({1, 2, 3}));
-}
-
-// SizeIs should work for any type that provides a size() member function.
-// For example, a size_type member type should not need to be provided.
-struct MinimalistCustomType {
-  int size() const { return 1; }
-};
-TEST(SizeIsTest, WorksWithMinimalistCustomType) {
-  MinimalistCustomType container;
-  EXPECT_THAT(container, SizeIs(1));
-  EXPECT_THAT(container, Not(SizeIs(0)));
-}
-
-TEST(SizeIsTest, CanDescribeSelf) {
-  Matcher<vector<int> > m = SizeIs(2);
-  EXPECT_EQ("size is equal to 2", Describe(m));
-  EXPECT_EQ("size isn't equal to 2", DescribeNegation(m));
-}
-
-TEST(SizeIsTest, ExplainsResult) {
-  Matcher<vector<int> > m1 = SizeIs(2);
-  Matcher<vector<int> > m2 = SizeIs(Lt(2u));
-  Matcher<vector<int> > m3 = SizeIs(AnyOf(0, 3));
-  Matcher<vector<int> > m4 = SizeIs(Gt(1u));
-  vector<int> container;
-  EXPECT_EQ("whose size 0 doesn't match", Explain(m1, container));
-  EXPECT_EQ("whose size 0 matches", Explain(m2, container));
-  EXPECT_EQ("whose size 0 matches", Explain(m3, container));
-  EXPECT_EQ("whose size 0 doesn't match", Explain(m4, container));
-  container.push_back(0);
-  container.push_back(0);
-  EXPECT_EQ("whose size 2 matches", Explain(m1, container));
-  EXPECT_EQ("whose size 2 doesn't match", Explain(m2, container));
-  EXPECT_EQ("whose size 2 doesn't match", Explain(m3, container));
-  EXPECT_EQ("whose size 2 matches", Explain(m4, container));
-}
-
-#if GTEST_HAS_TYPED_TEST
-// Tests ContainerEq with different container types, and
-// different element types.
-
-template <typename T>
-class ContainerEqTest : public testing::Test {};
-
-typedef testing::Types<
-    set<int>,
-    vector<size_t>,
-    multiset<size_t>,
-    list<int> >
-    ContainerEqTestTypes;
-
-TYPED_TEST_SUITE(ContainerEqTest, ContainerEqTestTypes);
-
-// Tests that the filled container is equal to itself.
-TYPED_TEST(ContainerEqTest, EqualsSelf) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  TypeParam my_set(vals, vals + 6);
-  const Matcher<TypeParam> m = ContainerEq(my_set);
-  EXPECT_TRUE(m.Matches(my_set));
-  EXPECT_EQ("", Explain(m, my_set));
-}
-
-// Tests that missing values are reported.
-TYPED_TEST(ContainerEqTest, ValueMissing) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {2, 1, 8, 5};
-  TypeParam my_set(vals, vals + 6);
-  TypeParam test_set(test_vals, test_vals + 4);
-  const Matcher<TypeParam> m = ContainerEq(my_set);
-  EXPECT_FALSE(m.Matches(test_set));
-  EXPECT_EQ("which doesn't have these expected elements: 3",
-            Explain(m, test_set));
-}
-
-// Tests that added values are reported.
-TYPED_TEST(ContainerEqTest, ValueAdded) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {1, 2, 3, 5, 8, 46};
-  TypeParam my_set(vals, vals + 6);
-  TypeParam test_set(test_vals, test_vals + 6);
-  const Matcher<const TypeParam&> m = ContainerEq(my_set);
-  EXPECT_FALSE(m.Matches(test_set));
-  EXPECT_EQ("which has these unexpected elements: 46", Explain(m, test_set));
-}
-
-// Tests that added and missing values are reported together.
-TYPED_TEST(ContainerEqTest, ValueAddedAndRemoved) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {1, 2, 3, 8, 46};
-  TypeParam my_set(vals, vals + 6);
-  TypeParam test_set(test_vals, test_vals + 5);
-  const Matcher<TypeParam> m = ContainerEq(my_set);
-  EXPECT_FALSE(m.Matches(test_set));
-  EXPECT_EQ("which has these unexpected elements: 46,\n"
-            "and doesn't have these expected elements: 5",
-            Explain(m, test_set));
-}
-
-// Tests duplicated value -- expect no explanation.
-TYPED_TEST(ContainerEqTest, DuplicateDifference) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {1, 2, 3, 5, 8};
-  TypeParam my_set(vals, vals + 6);
-  TypeParam test_set(test_vals, test_vals + 5);
-  const Matcher<const TypeParam&> m = ContainerEq(my_set);
-  // Depending on the container, match may be true or false
-  // But in any case there should be no explanation.
-  EXPECT_EQ("", Explain(m, test_set));
-}
-#endif  // GTEST_HAS_TYPED_TEST
-
-// Tests that multiple missing values are reported.
-// Using just vector here, so order is predictable.
-TEST(ContainerEqExtraTest, MultipleValuesMissing) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {2, 1, 5};
-  vector<int> my_set(vals, vals + 6);
-  vector<int> test_set(test_vals, test_vals + 3);
-  const Matcher<vector<int> > m = ContainerEq(my_set);
-  EXPECT_FALSE(m.Matches(test_set));
-  EXPECT_EQ("which doesn't have these expected elements: 3, 8",
-            Explain(m, test_set));
-}
-
-// Tests that added values are reported.
-// Using just vector here, so order is predictable.
-TEST(ContainerEqExtraTest, MultipleValuesAdded) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {1, 2, 92, 3, 5, 8, 46};
-  list<size_t> my_set(vals, vals + 6);
-  list<size_t> test_set(test_vals, test_vals + 7);
-  const Matcher<const list<size_t>&> m = ContainerEq(my_set);
-  EXPECT_FALSE(m.Matches(test_set));
-  EXPECT_EQ("which has these unexpected elements: 92, 46",
-            Explain(m, test_set));
-}
-
-// Tests that added and missing values are reported together.
-TEST(ContainerEqExtraTest, MultipleValuesAddedAndRemoved) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {1, 2, 3, 92, 46};
-  list<size_t> my_set(vals, vals + 6);
-  list<size_t> test_set(test_vals, test_vals + 5);
-  const Matcher<const list<size_t> > m = ContainerEq(my_set);
-  EXPECT_FALSE(m.Matches(test_set));
-  EXPECT_EQ("which has these unexpected elements: 92, 46,\n"
-            "and doesn't have these expected elements: 5, 8",
-            Explain(m, test_set));
-}
-
-// Tests to see that duplicate elements are detected,
-// but (as above) not reported in the explanation.
-TEST(ContainerEqExtraTest, MultiSetOfIntDuplicateDifference) {
-  static const int vals[] = {1, 1, 2, 3, 5, 8};
-  static const int test_vals[] = {1, 2, 3, 5, 8};
-  vector<int> my_set(vals, vals + 6);
-  vector<int> test_set(test_vals, test_vals + 5);
-  const Matcher<vector<int> > m = ContainerEq(my_set);
-  EXPECT_TRUE(m.Matches(my_set));
-  EXPECT_FALSE(m.Matches(test_set));
-  // There is nothing to report when both sets contain all the same values.
-  EXPECT_EQ("", Explain(m, test_set));
-}
-
-// Tests that ContainerEq works for non-trivial associative containers,
-// like maps.
-TEST(ContainerEqExtraTest, WorksForMaps) {
-  map<int, std::string> my_map;
-  my_map[0] = "a";
-  my_map[1] = "b";
-
-  map<int, std::string> test_map;
-  test_map[0] = "aa";
-  test_map[1] = "b";
-
-  const Matcher<const map<int, std::string>&> m = ContainerEq(my_map);
-  EXPECT_TRUE(m.Matches(my_map));
-  EXPECT_FALSE(m.Matches(test_map));
-
-  EXPECT_EQ("which has these unexpected elements: (0, \"aa\"),\n"
-            "and doesn't have these expected elements: (0, \"a\")",
-            Explain(m, test_map));
-}
-
-TEST(ContainerEqExtraTest, WorksForNativeArray) {
-  int a1[] = {1, 2, 3};
-  int a2[] = {1, 2, 3};
-  int b[] = {1, 2, 4};
-
-  EXPECT_THAT(a1, ContainerEq(a2));
-  EXPECT_THAT(a1, Not(ContainerEq(b)));
-}
-
-TEST(ContainerEqExtraTest, WorksForTwoDimensionalNativeArray) {
-  const char a1[][3] = {"hi", "lo"};
-  const char a2[][3] = {"hi", "lo"};
-  const char b[][3] = {"lo", "hi"};
-
-  // Tests using ContainerEq() in the first dimension.
-  EXPECT_THAT(a1, ContainerEq(a2));
-  EXPECT_THAT(a1, Not(ContainerEq(b)));
-
-  // Tests using ContainerEq() in the second dimension.
-  EXPECT_THAT(a1, ElementsAre(ContainerEq(a2[0]), ContainerEq(a2[1])));
-  EXPECT_THAT(a1, ElementsAre(Not(ContainerEq(b[0])), ContainerEq(a2[1])));
-}
-
-TEST(ContainerEqExtraTest, WorksForNativeArrayAsTuple) {
-  const int a1[] = {1, 2, 3};
-  const int a2[] = {1, 2, 3};
-  const int b[] = {1, 2, 3, 4};
-
-  const int* const p1 = a1;
-  EXPECT_THAT(std::make_tuple(p1, 3), ContainerEq(a2));
-  EXPECT_THAT(std::make_tuple(p1, 3), Not(ContainerEq(b)));
-
-  const int c[] = {1, 3, 2};
-  EXPECT_THAT(std::make_tuple(p1, 3), Not(ContainerEq(c)));
-}
-
-TEST(ContainerEqExtraTest, CopiesNativeArrayParameter) {
-  std::string a1[][3] = {
-    {"hi", "hello", "ciao"},
-    {"bye", "see you", "ciao"}
-  };
-
-  std::string a2[][3] = {
-    {"hi", "hello", "ciao"},
-    {"bye", "see you", "ciao"}
-  };
-
-  const Matcher<const std::string(&)[2][3]> m = ContainerEq(a2);
-  EXPECT_THAT(a1, m);
-
-  a2[0][0] = "ha";
-  EXPECT_THAT(a1, m);
-}
-
-TEST(WhenSortedByTest, WorksForEmptyContainer) {
-  const vector<int> numbers;
-  EXPECT_THAT(numbers, WhenSortedBy(less<int>(), ElementsAre()));
-  EXPECT_THAT(numbers, Not(WhenSortedBy(less<int>(), ElementsAre(1))));
-}
-
-TEST(WhenSortedByTest, WorksForNonEmptyContainer) {
-  vector<unsigned> numbers;
-  numbers.push_back(3);
-  numbers.push_back(1);
-  numbers.push_back(2);
-  numbers.push_back(2);
-  EXPECT_THAT(numbers, WhenSortedBy(greater<unsigned>(),
-                                    ElementsAre(3, 2, 2, 1)));
-  EXPECT_THAT(numbers, Not(WhenSortedBy(greater<unsigned>(),
-                                        ElementsAre(1, 2, 2, 3))));
-}
-
-TEST(WhenSortedByTest, WorksForNonVectorContainer) {
-  list<std::string> words;
-  words.push_back("say");
-  words.push_back("hello");
-  words.push_back("world");
-  EXPECT_THAT(words, WhenSortedBy(less<std::string>(),
-                                  ElementsAre("hello", "say", "world")));
-  EXPECT_THAT(words, Not(WhenSortedBy(less<std::string>(),
-                                      ElementsAre("say", "hello", "world"))));
-}
-
-TEST(WhenSortedByTest, WorksForNativeArray) {
-  const int numbers[] = {1, 3, 2, 4};
-  const int sorted_numbers[] = {1, 2, 3, 4};
-  EXPECT_THAT(numbers, WhenSortedBy(less<int>(), ElementsAre(1, 2, 3, 4)));
-  EXPECT_THAT(numbers, WhenSortedBy(less<int>(),
-                                    ElementsAreArray(sorted_numbers)));
-  EXPECT_THAT(numbers, Not(WhenSortedBy(less<int>(), ElementsAre(1, 3, 2, 4))));
-}
-
-TEST(WhenSortedByTest, CanDescribeSelf) {
-  const Matcher<vector<int> > m = WhenSortedBy(less<int>(), ElementsAre(1, 2));
-  EXPECT_EQ("(when sorted) has 2 elements where\n"
-            "element #0 is equal to 1,\n"
-            "element #1 is equal to 2",
-            Describe(m));
-  EXPECT_EQ("(when sorted) doesn't have 2 elements, or\n"
-            "element #0 isn't equal to 1, or\n"
-            "element #1 isn't equal to 2",
-            DescribeNegation(m));
-}
-
-TEST(WhenSortedByTest, ExplainsMatchResult) {
-  const int a[] = {2, 1};
-  EXPECT_EQ("which is { 1, 2 } when sorted, whose element #0 doesn't match",
-            Explain(WhenSortedBy(less<int>(), ElementsAre(2, 3)), a));
-  EXPECT_EQ("which is { 1, 2 } when sorted",
-            Explain(WhenSortedBy(less<int>(), ElementsAre(1, 2)), a));
-}
-
-// WhenSorted() is a simple wrapper on WhenSortedBy().  Hence we don't
-// need to test it as exhaustively as we test the latter.
-
-TEST(WhenSortedTest, WorksForEmptyContainer) {
-  const vector<int> numbers;
-  EXPECT_THAT(numbers, WhenSorted(ElementsAre()));
-  EXPECT_THAT(numbers, Not(WhenSorted(ElementsAre(1))));
-}
-
-TEST(WhenSortedTest, WorksForNonEmptyContainer) {
-  list<std::string> words;
-  words.push_back("3");
-  words.push_back("1");
-  words.push_back("2");
-  words.push_back("2");
-  EXPECT_THAT(words, WhenSorted(ElementsAre("1", "2", "2", "3")));
-  EXPECT_THAT(words, Not(WhenSorted(ElementsAre("3", "1", "2", "2"))));
-}
-
-TEST(WhenSortedTest, WorksForMapTypes) {
-  map<std::string, int> word_counts;
-  word_counts["and"] = 1;
-  word_counts["the"] = 1;
-  word_counts["buffalo"] = 2;
-  EXPECT_THAT(word_counts,
-              WhenSorted(ElementsAre(Pair("and", 1), Pair("buffalo", 2),
-                                     Pair("the", 1))));
-  EXPECT_THAT(word_counts,
-              Not(WhenSorted(ElementsAre(Pair("and", 1), Pair("the", 1),
-                                         Pair("buffalo", 2)))));
-}
-
-TEST(WhenSortedTest, WorksForMultiMapTypes) {
-    multimap<int, int> ifib;
-    ifib.insert(make_pair(8, 6));
-    ifib.insert(make_pair(2, 3));
-    ifib.insert(make_pair(1, 1));
-    ifib.insert(make_pair(3, 4));
-    ifib.insert(make_pair(1, 2));
-    ifib.insert(make_pair(5, 5));
-    EXPECT_THAT(ifib, WhenSorted(ElementsAre(Pair(1, 1),
-                                             Pair(1, 2),
-                                             Pair(2, 3),
-                                             Pair(3, 4),
-                                             Pair(5, 5),
-                                             Pair(8, 6))));
-    EXPECT_THAT(ifib, Not(WhenSorted(ElementsAre(Pair(8, 6),
-                                                 Pair(2, 3),
-                                                 Pair(1, 1),
-                                                 Pair(3, 4),
-                                                 Pair(1, 2),
-                                                 Pair(5, 5)))));
-}
-
-TEST(WhenSortedTest, WorksForPolymorphicMatcher) {
-    std::deque<int> d;
-    d.push_back(2);
-    d.push_back(1);
-    EXPECT_THAT(d, WhenSorted(ElementsAre(1, 2)));
-    EXPECT_THAT(d, Not(WhenSorted(ElementsAre(2, 1))));
-}
-
-TEST(WhenSortedTest, WorksForVectorConstRefMatcher) {
-    std::deque<int> d;
-    d.push_back(2);
-    d.push_back(1);
-    Matcher<const std::vector<int>&> vector_match = ElementsAre(1, 2);
-    EXPECT_THAT(d, WhenSorted(vector_match));
-    Matcher<const std::vector<int>&> not_vector_match = ElementsAre(2, 1);
-    EXPECT_THAT(d, Not(WhenSorted(not_vector_match)));
-}
-
-// Deliberately bare pseudo-container.
-// Offers only begin() and end() accessors, yielding InputIterator.
-template <typename T>
-class Streamlike {
- private:
-  class ConstIter;
- public:
-  typedef ConstIter const_iterator;
-  typedef T value_type;
-
-  template <typename InIter>
-  Streamlike(InIter first, InIter last) : remainder_(first, last) {}
-
-  const_iterator begin() const {
-    return const_iterator(this, remainder_.begin());
-  }
-  const_iterator end() const {
-    return const_iterator(this, remainder_.end());
-  }
-
- private:
-  class ConstIter : public std::iterator<std::input_iterator_tag,
-                                         value_type,
-                                         ptrdiff_t,
-                                         const value_type*,
-                                         const value_type&> {
-   public:
-    ConstIter(const Streamlike* s,
-              typename std::list<value_type>::iterator pos)
-        : s_(s), pos_(pos) {}
-
-    const value_type& operator*() const { return *pos_; }
-    const value_type* operator->() const { return &*pos_; }
-    ConstIter& operator++() {
-      s_->remainder_.erase(pos_++);
-      return *this;
-    }
-
-    // *iter++ is required to work (see std::istreambuf_iterator).
-    // (void)iter++ is also required to work.
-    class PostIncrProxy {
-     public:
-      explicit PostIncrProxy(const value_type& value) : value_(value) {}
-      value_type operator*() const { return value_; }
-     private:
-      value_type value_;
-    };
-    PostIncrProxy operator++(int) {
-      PostIncrProxy proxy(**this);
-      ++(*this);
-      return proxy;
-    }
-
-    friend bool operator==(const ConstIter& a, const ConstIter& b) {
-      return a.s_ == b.s_ && a.pos_ == b.pos_;
-    }
-    friend bool operator!=(const ConstIter& a, const ConstIter& b) {
-      return !(a == b);
-    }
-
-   private:
-    const Streamlike* s_;
-    typename std::list<value_type>::iterator pos_;
-  };
-
-  friend std::ostream& operator<<(std::ostream& os, const Streamlike& s) {
-    os << "[";
-    typedef typename std::list<value_type>::const_iterator Iter;
-    const char* sep = "";
-    for (Iter it = s.remainder_.begin(); it != s.remainder_.end(); ++it) {
-      os << sep << *it;
-      sep = ",";
-    }
-    os << "]";
-    return os;
-  }
-
-  mutable std::list<value_type> remainder_;  // modified by iteration
-};
-
-TEST(StreamlikeTest, Iteration) {
-  const int a[5] = {2, 1, 4, 5, 3};
-  Streamlike<int> s(a, a + 5);
-  Streamlike<int>::const_iterator it = s.begin();
-  const int* ip = a;
-  while (it != s.end()) {
-    SCOPED_TRACE(ip - a);
-    EXPECT_EQ(*ip++, *it++);
-  }
-}
-
-TEST(BeginEndDistanceIsTest, WorksWithForwardList) {
-  std::forward_list<int> container;
-  EXPECT_THAT(container, BeginEndDistanceIs(0));
-  EXPECT_THAT(container, Not(BeginEndDistanceIs(1)));
-  container.push_front(0);
-  EXPECT_THAT(container, Not(BeginEndDistanceIs(0)));
-  EXPECT_THAT(container, BeginEndDistanceIs(1));
-  container.push_front(0);
-  EXPECT_THAT(container, Not(BeginEndDistanceIs(0)));
-  EXPECT_THAT(container, BeginEndDistanceIs(2));
-}
-
-TEST(BeginEndDistanceIsTest, WorksWithNonStdList) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  Streamlike<int> s(a, a + 5);
-  EXPECT_THAT(s, BeginEndDistanceIs(5));
-}
-
-TEST(BeginEndDistanceIsTest, CanDescribeSelf) {
-  Matcher<vector<int> > m = BeginEndDistanceIs(2);
-  EXPECT_EQ("distance between begin() and end() is equal to 2", Describe(m));
-  EXPECT_EQ("distance between begin() and end() isn't equal to 2",
-            DescribeNegation(m));
-}
-
-TEST(BeginEndDistanceIsTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(BeginEndDistanceIs(2)));
-  helper.Call(MakeUniquePtrs({1, 2}));
-}
-
-TEST(BeginEndDistanceIsTest, ExplainsResult) {
-  Matcher<vector<int> > m1 = BeginEndDistanceIs(2);
-  Matcher<vector<int> > m2 = BeginEndDistanceIs(Lt(2));
-  Matcher<vector<int> > m3 = BeginEndDistanceIs(AnyOf(0, 3));
-  Matcher<vector<int> > m4 = BeginEndDistanceIs(GreaterThan(1));
-  vector<int> container;
-  EXPECT_EQ("whose distance between begin() and end() 0 doesn't match",
-            Explain(m1, container));
-  EXPECT_EQ("whose distance between begin() and end() 0 matches",
-            Explain(m2, container));
-  EXPECT_EQ("whose distance between begin() and end() 0 matches",
-            Explain(m3, container));
-  EXPECT_EQ(
-      "whose distance between begin() and end() 0 doesn't match, which is 1 "
-      "less than 1",
-      Explain(m4, container));
-  container.push_back(0);
-  container.push_back(0);
-  EXPECT_EQ("whose distance between begin() and end() 2 matches",
-            Explain(m1, container));
-  EXPECT_EQ("whose distance between begin() and end() 2 doesn't match",
-            Explain(m2, container));
-  EXPECT_EQ("whose distance between begin() and end() 2 doesn't match",
-            Explain(m3, container));
-  EXPECT_EQ(
-      "whose distance between begin() and end() 2 matches, which is 1 more "
-      "than 1",
-      Explain(m4, container));
-}
-
-TEST(WhenSortedTest, WorksForStreamlike) {
-  // Streamlike 'container' provides only minimal iterator support.
-  // Its iterators are tagged with input_iterator_tag.
-  const int a[5] = {2, 1, 4, 5, 3};
-  Streamlike<int> s(std::begin(a), std::end(a));
-  EXPECT_THAT(s, WhenSorted(ElementsAre(1, 2, 3, 4, 5)));
-  EXPECT_THAT(s, Not(WhenSorted(ElementsAre(2, 1, 4, 5, 3))));
-}
-
-TEST(WhenSortedTest, WorksForVectorConstRefMatcherOnStreamlike) {
-  const int a[] = {2, 1, 4, 5, 3};
-  Streamlike<int> s(std::begin(a), std::end(a));
-  Matcher<const std::vector<int>&> vector_match = ElementsAre(1, 2, 3, 4, 5);
-  EXPECT_THAT(s, WhenSorted(vector_match));
-  EXPECT_THAT(s, Not(WhenSorted(ElementsAre(2, 1, 4, 5, 3))));
-}
-
-TEST(IsSupersetOfTest, WorksForNativeArray) {
-  const int subset[] = {1, 4};
-  const int superset[] = {1, 2, 4};
-  const int disjoint[] = {1, 0, 3};
-  EXPECT_THAT(subset, IsSupersetOf(subset));
-  EXPECT_THAT(subset, Not(IsSupersetOf(superset)));
-  EXPECT_THAT(superset, IsSupersetOf(subset));
-  EXPECT_THAT(subset, Not(IsSupersetOf(disjoint)));
-  EXPECT_THAT(disjoint, Not(IsSupersetOf(subset)));
-}
-
-TEST(IsSupersetOfTest, WorksWithDuplicates) {
-  const int not_enough[] = {1, 2};
-  const int enough[] = {1, 1, 2};
-  const int expected[] = {1, 1};
-  EXPECT_THAT(not_enough, Not(IsSupersetOf(expected)));
-  EXPECT_THAT(enough, IsSupersetOf(expected));
-}
-
-TEST(IsSupersetOfTest, WorksForEmpty) {
-  vector<int> numbers;
-  vector<int> expected;
-  EXPECT_THAT(numbers, IsSupersetOf(expected));
-  expected.push_back(1);
-  EXPECT_THAT(numbers, Not(IsSupersetOf(expected)));
-  expected.clear();
-  numbers.push_back(1);
-  numbers.push_back(2);
-  EXPECT_THAT(numbers, IsSupersetOf(expected));
-  expected.push_back(1);
-  EXPECT_THAT(numbers, IsSupersetOf(expected));
-  expected.push_back(2);
-  EXPECT_THAT(numbers, IsSupersetOf(expected));
-  expected.push_back(3);
-  EXPECT_THAT(numbers, Not(IsSupersetOf(expected)));
-}
-
-TEST(IsSupersetOfTest, WorksForStreamlike) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  Streamlike<int> s(std::begin(a), std::end(a));
-
-  vector<int> expected;
-  expected.push_back(1);
-  expected.push_back(2);
-  expected.push_back(5);
-  EXPECT_THAT(s, IsSupersetOf(expected));
-
-  expected.push_back(0);
-  EXPECT_THAT(s, Not(IsSupersetOf(expected)));
-}
-
-TEST(IsSupersetOfTest, TakesStlContainer) {
-  const int actual[] = {3, 1, 2};
-
-  ::std::list<int> expected;
-  expected.push_back(1);
-  expected.push_back(3);
-  EXPECT_THAT(actual, IsSupersetOf(expected));
-
-  expected.push_back(4);
-  EXPECT_THAT(actual, Not(IsSupersetOf(expected)));
-}
-
-TEST(IsSupersetOfTest, Describe) {
-  typedef std::vector<int> IntVec;
-  IntVec expected;
-  expected.push_back(111);
-  expected.push_back(222);
-  expected.push_back(333);
-  EXPECT_THAT(
-      Describe<IntVec>(IsSupersetOf(expected)),
-      Eq("a surjection from elements to requirements exists such that:\n"
-         " - an element is equal to 111\n"
-         " - an element is equal to 222\n"
-         " - an element is equal to 333"));
-}
-
-TEST(IsSupersetOfTest, DescribeNegation) {
-  typedef std::vector<int> IntVec;
-  IntVec expected;
-  expected.push_back(111);
-  expected.push_back(222);
-  expected.push_back(333);
-  EXPECT_THAT(
-      DescribeNegation<IntVec>(IsSupersetOf(expected)),
-      Eq("no surjection from elements to requirements exists such that:\n"
-         " - an element is equal to 111\n"
-         " - an element is equal to 222\n"
-         " - an element is equal to 333"));
-}
-
-TEST(IsSupersetOfTest, MatchAndExplain) {
-  std::vector<int> v;
-  v.push_back(2);
-  v.push_back(3);
-  std::vector<int> expected;
-  expected.push_back(1);
-  expected.push_back(2);
-  StringMatchResultListener listener;
-  ASSERT_FALSE(ExplainMatchResult(IsSupersetOf(expected), v, &listener))
-      << listener.str();
-  EXPECT_THAT(listener.str(),
-              Eq("where the following matchers don't match any elements:\n"
-                 "matcher #0: is equal to 1"));
-
-  v.push_back(1);
-  listener.Clear();
-  ASSERT_TRUE(ExplainMatchResult(IsSupersetOf(expected), v, &listener))
-      << listener.str();
-  EXPECT_THAT(listener.str(), Eq("where:\n"
-                                 " - element #0 is matched by matcher #1,\n"
-                                 " - element #2 is matched by matcher #0"));
-}
-
-TEST(IsSupersetOfTest, WorksForRhsInitializerList) {
-  const int numbers[] = {1, 3, 6, 2, 4, 5};
-  EXPECT_THAT(numbers, IsSupersetOf({1, 2}));
-  EXPECT_THAT(numbers, Not(IsSupersetOf({3, 0})));
-}
-
-TEST(IsSupersetOfTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(IsSupersetOf({Pointee(1)})));
-  helper.Call(MakeUniquePtrs({1, 2}));
-  EXPECT_CALL(helper, Call(Not(IsSupersetOf({Pointee(1), Pointee(2)}))));
-  helper.Call(MakeUniquePtrs({2}));
-}
-
-TEST(IsSubsetOfTest, WorksForNativeArray) {
-  const int subset[] = {1, 4};
-  const int superset[] = {1, 2, 4};
-  const int disjoint[] = {1, 0, 3};
-  EXPECT_THAT(subset, IsSubsetOf(subset));
-  EXPECT_THAT(subset, IsSubsetOf(superset));
-  EXPECT_THAT(superset, Not(IsSubsetOf(subset)));
-  EXPECT_THAT(subset, Not(IsSubsetOf(disjoint)));
-  EXPECT_THAT(disjoint, Not(IsSubsetOf(subset)));
-}
-
-TEST(IsSubsetOfTest, WorksWithDuplicates) {
-  const int not_enough[] = {1, 2};
-  const int enough[] = {1, 1, 2};
-  const int actual[] = {1, 1};
-  EXPECT_THAT(actual, Not(IsSubsetOf(not_enough)));
-  EXPECT_THAT(actual, IsSubsetOf(enough));
-}
-
-TEST(IsSubsetOfTest, WorksForEmpty) {
-  vector<int> numbers;
-  vector<int> expected;
-  EXPECT_THAT(numbers, IsSubsetOf(expected));
-  expected.push_back(1);
-  EXPECT_THAT(numbers, IsSubsetOf(expected));
-  expected.clear();
-  numbers.push_back(1);
-  numbers.push_back(2);
-  EXPECT_THAT(numbers, Not(IsSubsetOf(expected)));
-  expected.push_back(1);
-  EXPECT_THAT(numbers, Not(IsSubsetOf(expected)));
-  expected.push_back(2);
-  EXPECT_THAT(numbers, IsSubsetOf(expected));
-  expected.push_back(3);
-  EXPECT_THAT(numbers, IsSubsetOf(expected));
-}
-
-TEST(IsSubsetOfTest, WorksForStreamlike) {
-  const int a[5] = {1, 2};
-  Streamlike<int> s(std::begin(a), std::end(a));
-
-  vector<int> expected;
-  expected.push_back(1);
-  EXPECT_THAT(s, Not(IsSubsetOf(expected)));
-  expected.push_back(2);
-  expected.push_back(5);
-  EXPECT_THAT(s, IsSubsetOf(expected));
-}
-
-TEST(IsSubsetOfTest, TakesStlContainer) {
-  const int actual[] = {3, 1, 2};
-
-  ::std::list<int> expected;
-  expected.push_back(1);
-  expected.push_back(3);
-  EXPECT_THAT(actual, Not(IsSubsetOf(expected)));
-
-  expected.push_back(2);
-  expected.push_back(4);
-  EXPECT_THAT(actual, IsSubsetOf(expected));
-}
-
-TEST(IsSubsetOfTest, Describe) {
-  typedef std::vector<int> IntVec;
-  IntVec expected;
-  expected.push_back(111);
-  expected.push_back(222);
-  expected.push_back(333);
-
-  EXPECT_THAT(
-      Describe<IntVec>(IsSubsetOf(expected)),
-      Eq("an injection from elements to requirements exists such that:\n"
-         " - an element is equal to 111\n"
-         " - an element is equal to 222\n"
-         " - an element is equal to 333"));
-}
-
-TEST(IsSubsetOfTest, DescribeNegation) {
-  typedef std::vector<int> IntVec;
-  IntVec expected;
-  expected.push_back(111);
-  expected.push_back(222);
-  expected.push_back(333);
-  EXPECT_THAT(
-      DescribeNegation<IntVec>(IsSubsetOf(expected)),
-      Eq("no injection from elements to requirements exists such that:\n"
-         " - an element is equal to 111\n"
-         " - an element is equal to 222\n"
-         " - an element is equal to 333"));
-}
-
-TEST(IsSubsetOfTest, MatchAndExplain) {
-  std::vector<int> v;
-  v.push_back(2);
-  v.push_back(3);
-  std::vector<int> expected;
-  expected.push_back(1);
-  expected.push_back(2);
-  StringMatchResultListener listener;
-  ASSERT_FALSE(ExplainMatchResult(IsSubsetOf(expected), v, &listener))
-      << listener.str();
-  EXPECT_THAT(listener.str(),
-              Eq("where the following elements don't match any matchers:\n"
-                 "element #1: 3"));
-
-  expected.push_back(3);
-  listener.Clear();
-  ASSERT_TRUE(ExplainMatchResult(IsSubsetOf(expected), v, &listener))
-      << listener.str();
-  EXPECT_THAT(listener.str(), Eq("where:\n"
-                                 " - element #0 is matched by matcher #1,\n"
-                                 " - element #1 is matched by matcher #2"));
-}
-
-TEST(IsSubsetOfTest, WorksForRhsInitializerList) {
-  const int numbers[] = {1, 2, 3};
-  EXPECT_THAT(numbers, IsSubsetOf({1, 2, 3, 4}));
-  EXPECT_THAT(numbers, Not(IsSubsetOf({1, 2})));
-}
-
-TEST(IsSubsetOfTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(IsSubsetOf({Pointee(1), Pointee(2)})));
-  helper.Call(MakeUniquePtrs({1}));
-  EXPECT_CALL(helper, Call(Not(IsSubsetOf({Pointee(1)}))));
-  helper.Call(MakeUniquePtrs({2}));
-}
-
-// Tests using ElementsAre() and ElementsAreArray() with stream-like
-// "containers".
-
-TEST(ElemensAreStreamTest, WorksForStreamlike) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  Streamlike<int> s(std::begin(a), std::end(a));
-  EXPECT_THAT(s, ElementsAre(1, 2, 3, 4, 5));
-  EXPECT_THAT(s, Not(ElementsAre(2, 1, 4, 5, 3)));
-}
-
-TEST(ElemensAreArrayStreamTest, WorksForStreamlike) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  Streamlike<int> s(std::begin(a), std::end(a));
-
-  vector<int> expected;
-  expected.push_back(1);
-  expected.push_back(2);
-  expected.push_back(3);
-  expected.push_back(4);
-  expected.push_back(5);
-  EXPECT_THAT(s, ElementsAreArray(expected));
-
-  expected[3] = 0;
-  EXPECT_THAT(s, Not(ElementsAreArray(expected)));
-}
-
-TEST(ElementsAreTest, WorksWithUncopyable) {
-  Uncopyable objs[2];
-  objs[0].set_value(-3);
-  objs[1].set_value(1);
-  EXPECT_THAT(objs, ElementsAre(UncopyableIs(-3), Truly(ValueIsPositive)));
-}
-
-TEST(ElementsAreTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(ElementsAre(Pointee(1), Pointee(2))));
-  helper.Call(MakeUniquePtrs({1, 2}));
-
-  EXPECT_CALL(helper, Call(ElementsAreArray({Pointee(3), Pointee(4)})));
-  helper.Call(MakeUniquePtrs({3, 4}));
-}
-
-TEST(ElementsAreTest, TakesStlContainer) {
-  const int actual[] = {3, 1, 2};
-
-  ::std::list<int> expected;
-  expected.push_back(3);
-  expected.push_back(1);
-  expected.push_back(2);
-  EXPECT_THAT(actual, ElementsAreArray(expected));
-
-  expected.push_back(4);
-  EXPECT_THAT(actual, Not(ElementsAreArray(expected)));
-}
-
-// Tests for UnorderedElementsAreArray()
-
-TEST(UnorderedElementsAreArrayTest, SucceedsWhenExpected) {
-  const int a[] = {0, 1, 2, 3, 4};
-  std::vector<int> s(std::begin(a), std::end(a));
-  do {
-    StringMatchResultListener listener;
-    EXPECT_TRUE(ExplainMatchResult(UnorderedElementsAreArray(a),
-                                   s, &listener)) << listener.str();
-  } while (std::next_permutation(s.begin(), s.end()));
-}
-
-TEST(UnorderedElementsAreArrayTest, VectorBool) {
-  const bool a[] = {0, 1, 0, 1, 1};
-  const bool b[] = {1, 0, 1, 1, 0};
-  std::vector<bool> expected(std::begin(a), std::end(a));
-  std::vector<bool> actual(std::begin(b), std::end(b));
-  StringMatchResultListener listener;
-  EXPECT_TRUE(ExplainMatchResult(UnorderedElementsAreArray(expected),
-                                 actual, &listener)) << listener.str();
-}
-
-TEST(UnorderedElementsAreArrayTest, WorksForStreamlike) {
-  // Streamlike 'container' provides only minimal iterator support.
-  // Its iterators are tagged with input_iterator_tag, and it has no
-  // size() or empty() methods.
-  const int a[5] = {2, 1, 4, 5, 3};
-  Streamlike<int> s(std::begin(a), std::end(a));
-
-  ::std::vector<int> expected;
-  expected.push_back(1);
-  expected.push_back(2);
-  expected.push_back(3);
-  expected.push_back(4);
-  expected.push_back(5);
-  EXPECT_THAT(s, UnorderedElementsAreArray(expected));
-
-  expected.push_back(6);
-  EXPECT_THAT(s, Not(UnorderedElementsAreArray(expected)));
-}
-
-TEST(UnorderedElementsAreArrayTest, TakesStlContainer) {
-  const int actual[] = {3, 1, 2};
-
-  ::std::list<int> expected;
-  expected.push_back(1);
-  expected.push_back(2);
-  expected.push_back(3);
-  EXPECT_THAT(actual, UnorderedElementsAreArray(expected));
-
-  expected.push_back(4);
-  EXPECT_THAT(actual, Not(UnorderedElementsAreArray(expected)));
-}
-
-
-TEST(UnorderedElementsAreArrayTest, TakesInitializerList) {
-  const int a[5] = {2, 1, 4, 5, 3};
-  EXPECT_THAT(a, UnorderedElementsAreArray({1, 2, 3, 4, 5}));
-  EXPECT_THAT(a, Not(UnorderedElementsAreArray({1, 2, 3, 4, 6})));
-}
-
-TEST(UnorderedElementsAreArrayTest, TakesInitializerListOfCStrings) {
-  const std::string a[5] = {"a", "b", "c", "d", "e"};
-  EXPECT_THAT(a, UnorderedElementsAreArray({"a", "b", "c", "d", "e"}));
-  EXPECT_THAT(a, Not(UnorderedElementsAreArray({"a", "b", "c", "d", "ef"})));
-}
-
-TEST(UnorderedElementsAreArrayTest, TakesInitializerListOfSameTypedMatchers) {
-  const int a[5] = {2, 1, 4, 5, 3};
-  EXPECT_THAT(a, UnorderedElementsAreArray(
-      {Eq(1), Eq(2), Eq(3), Eq(4), Eq(5)}));
-  EXPECT_THAT(a, Not(UnorderedElementsAreArray(
-      {Eq(1), Eq(2), Eq(3), Eq(4), Eq(6)})));
-}
-
-TEST(UnorderedElementsAreArrayTest,
-     TakesInitializerListOfDifferentTypedMatchers) {
-  const int a[5] = {2, 1, 4, 5, 3};
-  // The compiler cannot infer the type of the initializer list if its
-  // elements have different types.  We must explicitly specify the
-  // unified element type in this case.
-  EXPECT_THAT(a, UnorderedElementsAreArray<Matcher<int> >(
-      {Eq(1), Ne(-2), Ge(3), Le(4), Eq(5)}));
-  EXPECT_THAT(a, Not(UnorderedElementsAreArray<Matcher<int> >(
-      {Eq(1), Ne(-2), Ge(3), Le(4), Eq(6)})));
-}
-
-
-TEST(UnorderedElementsAreArrayTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper,
-              Call(UnorderedElementsAreArray({Pointee(1), Pointee(2)})));
-  helper.Call(MakeUniquePtrs({2, 1}));
-}
-
-class UnorderedElementsAreTest : public testing::Test {
- protected:
-  typedef std::vector<int> IntVec;
-};
-
-TEST_F(UnorderedElementsAreTest, WorksWithUncopyable) {
-  Uncopyable objs[2];
-  objs[0].set_value(-3);
-  objs[1].set_value(1);
-  EXPECT_THAT(objs,
-              UnorderedElementsAre(Truly(ValueIsPositive), UncopyableIs(-3)));
-}
-
-TEST_F(UnorderedElementsAreTest, SucceedsWhenExpected) {
-  const int a[] = {1, 2, 3};
-  std::vector<int> s(std::begin(a), std::end(a));
-  do {
-    StringMatchResultListener listener;
-    EXPECT_TRUE(ExplainMatchResult(UnorderedElementsAre(1, 2, 3),
-                                   s, &listener)) << listener.str();
-  } while (std::next_permutation(s.begin(), s.end()));
-}
-
-TEST_F(UnorderedElementsAreTest, FailsWhenAnElementMatchesNoMatcher) {
-  const int a[] = {1, 2, 3};
-  std::vector<int> s(std::begin(a), std::end(a));
-  std::vector<Matcher<int> > mv;
-  mv.push_back(1);
-  mv.push_back(2);
-  mv.push_back(2);
-  // The element with value '3' matches nothing: fail fast.
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(UnorderedElementsAreArray(mv),
-                                  s, &listener)) << listener.str();
-}
-
-TEST_F(UnorderedElementsAreTest, WorksForStreamlike) {
-  // Streamlike 'container' provides only minimal iterator support.
-  // Its iterators are tagged with input_iterator_tag, and it has no
-  // size() or empty() methods.
-  const int a[5] = {2, 1, 4, 5, 3};
-  Streamlike<int> s(std::begin(a), std::end(a));
-
-  EXPECT_THAT(s, UnorderedElementsAre(1, 2, 3, 4, 5));
-  EXPECT_THAT(s, Not(UnorderedElementsAre(2, 2, 3, 4, 5)));
-}
-
-TEST_F(UnorderedElementsAreTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(UnorderedElementsAre(Pointee(1), Pointee(2))));
-  helper.Call(MakeUniquePtrs({2, 1}));
-}
-
-// One naive implementation of the matcher runs in O(N!) time, which is too
-// slow for many real-world inputs. This test shows that our matcher can match
-// 100 inputs very quickly (a few milliseconds).  An O(100!) is 10^158
-// iterations and obviously effectively incomputable.
-// [ RUN      ] UnorderedElementsAreTest.Performance
-// [       OK ] UnorderedElementsAreTest.Performance (4 ms)
-TEST_F(UnorderedElementsAreTest, Performance) {
-  std::vector<int> s;
-  std::vector<Matcher<int> > mv;
-  for (int i = 0; i < 100; ++i) {
-    s.push_back(i);
-    mv.push_back(_);
-  }
-  mv[50] = Eq(0);
-  StringMatchResultListener listener;
-  EXPECT_TRUE(ExplainMatchResult(UnorderedElementsAreArray(mv),
-                                 s, &listener)) << listener.str();
-}
-
-// Another variant of 'Performance' with similar expectations.
-// [ RUN      ] UnorderedElementsAreTest.PerformanceHalfStrict
-// [       OK ] UnorderedElementsAreTest.PerformanceHalfStrict (4 ms)
-TEST_F(UnorderedElementsAreTest, PerformanceHalfStrict) {
-  std::vector<int> s;
-  std::vector<Matcher<int> > mv;
-  for (int i = 0; i < 100; ++i) {
-    s.push_back(i);
-    if (i & 1) {
-      mv.push_back(_);
-    } else {
-      mv.push_back(i);
-    }
-  }
-  StringMatchResultListener listener;
-  EXPECT_TRUE(ExplainMatchResult(UnorderedElementsAreArray(mv),
-                                 s, &listener)) << listener.str();
-}
-
-TEST_F(UnorderedElementsAreTest, FailMessageCountWrong) {
-  std::vector<int> v;
-  v.push_back(4);
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(UnorderedElementsAre(1, 2, 3),
-                                  v, &listener)) << listener.str();
-  EXPECT_THAT(listener.str(), Eq("which has 1 element"));
-}
-
-TEST_F(UnorderedElementsAreTest, FailMessageCountWrongZero) {
-  std::vector<int> v;
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(UnorderedElementsAre(1, 2, 3),
-                                  v, &listener)) << listener.str();
-  EXPECT_THAT(listener.str(), Eq(""));
-}
-
-TEST_F(UnorderedElementsAreTest, FailMessageUnmatchedMatchers) {
-  std::vector<int> v;
-  v.push_back(1);
-  v.push_back(1);
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(UnorderedElementsAre(1, 2),
-                                  v, &listener)) << listener.str();
-  EXPECT_THAT(
-      listener.str(),
-      Eq("where the following matchers don't match any elements:\n"
-         "matcher #1: is equal to 2"));
-}
-
-TEST_F(UnorderedElementsAreTest, FailMessageUnmatchedElements) {
-  std::vector<int> v;
-  v.push_back(1);
-  v.push_back(2);
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(UnorderedElementsAre(1, 1),
-                                  v, &listener)) << listener.str();
-  EXPECT_THAT(
-      listener.str(),
-      Eq("where the following elements don't match any matchers:\n"
-         "element #1: 2"));
-}
-
-TEST_F(UnorderedElementsAreTest, FailMessageUnmatchedMatcherAndElement) {
-  std::vector<int> v;
-  v.push_back(2);
-  v.push_back(3);
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(UnorderedElementsAre(1, 2),
-                                  v, &listener)) << listener.str();
-  EXPECT_THAT(
-      listener.str(),
-      Eq("where"
-         " the following matchers don't match any elements:\n"
-         "matcher #0: is equal to 1\n"
-         "and"
-         " where"
-         " the following elements don't match any matchers:\n"
-         "element #1: 3"));
-}
-
-// Test helper for formatting element, matcher index pairs in expectations.
-static std::string EMString(int element, int matcher) {
-  stringstream ss;
-  ss << "(element #" << element << ", matcher #" << matcher << ")";
-  return ss.str();
-}
-
-TEST_F(UnorderedElementsAreTest, FailMessageImperfectMatchOnly) {
-  // A situation where all elements and matchers have a match
-  // associated with them, but the max matching is not perfect.
-  std::vector<std::string> v;
-  v.push_back("a");
-  v.push_back("b");
-  v.push_back("c");
-  StringMatchResultListener listener;
-  EXPECT_FALSE(ExplainMatchResult(
-      UnorderedElementsAre("a", "a", AnyOf("b", "c")), v, &listener))
-      << listener.str();
-
-  std::string prefix =
-      "where no permutation of the elements can satisfy all matchers, "
-      "and the closest match is 2 of 3 matchers with the "
-      "pairings:\n";
-
-  // We have to be a bit loose here, because there are 4 valid max matches.
-  EXPECT_THAT(
-      listener.str(),
-      AnyOf(prefix + "{\n  " + EMString(0, 0) +
-                     ",\n  " + EMString(1, 2) + "\n}",
-            prefix + "{\n  " + EMString(0, 1) +
-                     ",\n  " + EMString(1, 2) + "\n}",
-            prefix + "{\n  " + EMString(0, 0) +
-                     ",\n  " + EMString(2, 2) + "\n}",
-            prefix + "{\n  " + EMString(0, 1) +
-                     ",\n  " + EMString(2, 2) + "\n}"));
-}
-
-TEST_F(UnorderedElementsAreTest, Describe) {
-  EXPECT_THAT(Describe<IntVec>(UnorderedElementsAre()),
-              Eq("is empty"));
-  EXPECT_THAT(
-      Describe<IntVec>(UnorderedElementsAre(345)),
-      Eq("has 1 element and that element is equal to 345"));
-  EXPECT_THAT(
-      Describe<IntVec>(UnorderedElementsAre(111, 222, 333)),
-      Eq("has 3 elements and there exists some permutation "
-         "of elements such that:\n"
-         " - element #0 is equal to 111, and\n"
-         " - element #1 is equal to 222, and\n"
-         " - element #2 is equal to 333"));
-}
-
-TEST_F(UnorderedElementsAreTest, DescribeNegation) {
-  EXPECT_THAT(DescribeNegation<IntVec>(UnorderedElementsAre()),
-              Eq("isn't empty"));
-  EXPECT_THAT(
-      DescribeNegation<IntVec>(UnorderedElementsAre(345)),
-      Eq("doesn't have 1 element, or has 1 element that isn't equal to 345"));
-  EXPECT_THAT(
-      DescribeNegation<IntVec>(UnorderedElementsAre(123, 234, 345)),
-      Eq("doesn't have 3 elements, or there exists no permutation "
-         "of elements such that:\n"
-         " - element #0 is equal to 123, and\n"
-         " - element #1 is equal to 234, and\n"
-         " - element #2 is equal to 345"));
-}
-
-namespace {
-
-// Used as a check on the more complex max flow method used in the
-// real testing::internal::FindMaxBipartiteMatching. This method is
-// compatible but runs in worst-case factorial time, so we only
-// use it in testing for small problem sizes.
-template <typename Graph>
-class BacktrackingMaxBPMState {
- public:
-  // Does not take ownership of 'g'.
-  explicit BacktrackingMaxBPMState(const Graph* g) : graph_(g) { }
-
-  ElementMatcherPairs Compute() {
-    if (graph_->LhsSize() == 0 || graph_->RhsSize() == 0) {
-      return best_so_far_;
-    }
-    lhs_used_.assign(graph_->LhsSize(), kUnused);
-    rhs_used_.assign(graph_->RhsSize(), kUnused);
-    for (size_t irhs = 0; irhs < graph_->RhsSize(); ++irhs) {
-      matches_.clear();
-      RecurseInto(irhs);
-      if (best_so_far_.size() == graph_->RhsSize())
-        break;
-    }
-    return best_so_far_;
-  }
-
- private:
-  static const size_t kUnused = static_cast<size_t>(-1);
-
-  void PushMatch(size_t lhs, size_t rhs) {
-    matches_.push_back(ElementMatcherPair(lhs, rhs));
-    lhs_used_[lhs] = rhs;
-    rhs_used_[rhs] = lhs;
-    if (matches_.size() > best_so_far_.size()) {
-      best_so_far_ = matches_;
-    }
-  }
-
-  void PopMatch() {
-    const ElementMatcherPair& back = matches_.back();
-    lhs_used_[back.first] = kUnused;
-    rhs_used_[back.second] = kUnused;
-    matches_.pop_back();
-  }
-
-  bool RecurseInto(size_t irhs) {
-    if (rhs_used_[irhs] != kUnused) {
-      return true;
-    }
-    for (size_t ilhs = 0; ilhs < graph_->LhsSize(); ++ilhs) {
-      if (lhs_used_[ilhs] != kUnused) {
-        continue;
-      }
-      if (!graph_->HasEdge(ilhs, irhs)) {
-        continue;
-      }
-      PushMatch(ilhs, irhs);
-      if (best_so_far_.size() == graph_->RhsSize()) {
-        return false;
-      }
-      for (size_t mi = irhs + 1; mi < graph_->RhsSize(); ++mi) {
-        if (!RecurseInto(mi)) return false;
-      }
-      PopMatch();
-    }
-    return true;
-  }
-
-  const Graph* graph_;  // not owned
-  std::vector<size_t> lhs_used_;
-  std::vector<size_t> rhs_used_;
-  ElementMatcherPairs matches_;
-  ElementMatcherPairs best_so_far_;
-};
-
-template <typename Graph>
-const size_t BacktrackingMaxBPMState<Graph>::kUnused;
-
-}  // namespace
-
-// Implement a simple backtracking algorithm to determine if it is possible
-// to find one element per matcher, without reusing elements.
-template <typename Graph>
-ElementMatcherPairs
-FindBacktrackingMaxBPM(const Graph& g) {
-  return BacktrackingMaxBPMState<Graph>(&g).Compute();
-}
-
-class BacktrackingBPMTest : public ::testing::Test { };
-
-// Tests the MaxBipartiteMatching algorithm with square matrices.
-// The single int param is the # of nodes on each of the left and right sides.
-class BipartiteTest : public ::testing::TestWithParam<size_t> {};
-
-// Verify all match graphs up to some moderate number of edges.
-TEST_P(BipartiteTest, Exhaustive) {
-  size_t nodes = GetParam();
-  MatchMatrix graph(nodes, nodes);
-  do {
-    ElementMatcherPairs matches =
-        internal::FindMaxBipartiteMatching(graph);
-    EXPECT_EQ(FindBacktrackingMaxBPM(graph).size(), matches.size())
-        << "graph: " << graph.DebugString();
-    // Check that all elements of matches are in the graph.
-    // Check that elements of first and second are unique.
-    std::vector<bool> seen_element(graph.LhsSize());
-    std::vector<bool> seen_matcher(graph.RhsSize());
-    SCOPED_TRACE(PrintToString(matches));
-    for (size_t i = 0; i < matches.size(); ++i) {
-      size_t ilhs = matches[i].first;
-      size_t irhs = matches[i].second;
-      EXPECT_TRUE(graph.HasEdge(ilhs, irhs));
-      EXPECT_FALSE(seen_element[ilhs]);
-      EXPECT_FALSE(seen_matcher[irhs]);
-      seen_element[ilhs] = true;
-      seen_matcher[irhs] = true;
-    }
-  } while (graph.NextGraph());
-}
-
-INSTANTIATE_TEST_SUITE_P(AllGraphs, BipartiteTest,
-                         ::testing::Range(size_t{0}, size_t{5}));
-
-// Parameterized by a pair interpreted as (LhsSize, RhsSize).
-class BipartiteNonSquareTest
-    : public ::testing::TestWithParam<std::pair<size_t, size_t> > {
-};
-
-TEST_F(BipartiteNonSquareTest, SimpleBacktracking) {
-  //   .......
-  // 0:-----\ :
-  // 1:---\ | :
-  // 2:---\ | :
-  // 3:-\ | | :
-  //  :.......:
-  //    0 1 2
-  MatchMatrix g(4, 3);
-  constexpr std::array<std::array<size_t, 2>, 4> kEdges = {
-      {{{0, 2}}, {{1, 1}}, {{2, 1}}, {{3, 0}}}};
-  for (size_t i = 0; i < kEdges.size(); ++i) {
-    g.SetEdge(kEdges[i][0], kEdges[i][1], true);
-  }
-  EXPECT_THAT(FindBacktrackingMaxBPM(g),
-              ElementsAre(Pair(3, 0),
-                          Pair(AnyOf(1, 2), 1),
-                          Pair(0, 2))) << g.DebugString();
-}
-
-// Verify a few nonsquare matrices.
-TEST_P(BipartiteNonSquareTest, Exhaustive) {
-  size_t nlhs = GetParam().first;
-  size_t nrhs = GetParam().second;
-  MatchMatrix graph(nlhs, nrhs);
-  do {
-    EXPECT_EQ(FindBacktrackingMaxBPM(graph).size(),
-              internal::FindMaxBipartiteMatching(graph).size())
-        << "graph: " << graph.DebugString()
-        << "\nbacktracking: "
-        << PrintToString(FindBacktrackingMaxBPM(graph))
-        << "\nmax flow: "
-        << PrintToString(internal::FindMaxBipartiteMatching(graph));
-  } while (graph.NextGraph());
-}
-
-INSTANTIATE_TEST_SUITE_P(AllGraphs, BipartiteNonSquareTest,
-    testing::Values(
-        std::make_pair(1, 2),
-        std::make_pair(2, 1),
-        std::make_pair(3, 2),
-        std::make_pair(2, 3),
-        std::make_pair(4, 1),
-        std::make_pair(1, 4),
-        std::make_pair(4, 3),
-        std::make_pair(3, 4)));
-
-class BipartiteRandomTest
-    : public ::testing::TestWithParam<std::pair<int, int> > {
-};
-
-// Verifies a large sample of larger graphs.
-TEST_P(BipartiteRandomTest, LargerNets) {
-  int nodes = GetParam().first;
-  int iters = GetParam().second;
-  MatchMatrix graph(static_cast<size_t>(nodes), static_cast<size_t>(nodes));
-
-  auto seed = static_cast<uint32_t>(GTEST_FLAG(random_seed));
-  if (seed == 0) {
-    seed = static_cast<uint32_t>(time(nullptr));
-  }
-
-  for (; iters > 0; --iters, ++seed) {
-    srand(static_cast<unsigned int>(seed));
-    graph.Randomize();
-    EXPECT_EQ(FindBacktrackingMaxBPM(graph).size(),
-              internal::FindMaxBipartiteMatching(graph).size())
-        << " graph: " << graph.DebugString()
-        << "\nTo reproduce the failure, rerun the test with the flag"
-           " --" << GTEST_FLAG_PREFIX_ << "random_seed=" << seed;
-  }
-}
-
-// Test argument is a std::pair<int, int> representing (nodes, iters).
-INSTANTIATE_TEST_SUITE_P(Samples, BipartiteRandomTest,
-    testing::Values(
-        std::make_pair(5, 10000),
-        std::make_pair(6, 5000),
-        std::make_pair(7, 2000),
-        std::make_pair(8, 500),
-        std::make_pair(9, 100)));
-
-// Tests IsReadableTypeName().
-
-TEST(IsReadableTypeNameTest, ReturnsTrueForShortNames) {
-  EXPECT_TRUE(IsReadableTypeName("int"));
-  EXPECT_TRUE(IsReadableTypeName("const unsigned char*"));
-  EXPECT_TRUE(IsReadableTypeName("MyMap<int, void*>"));
-  EXPECT_TRUE(IsReadableTypeName("void (*)(int, bool)"));
-}
-
-TEST(IsReadableTypeNameTest, ReturnsTrueForLongNonTemplateNonFunctionNames) {
-  EXPECT_TRUE(IsReadableTypeName("my_long_namespace::MyClassName"));
-  EXPECT_TRUE(IsReadableTypeName("int [5][6][7][8][9][10][11]"));
-  EXPECT_TRUE(IsReadableTypeName("my_namespace::MyOuterClass::MyInnerClass"));
-}
-
-TEST(IsReadableTypeNameTest, ReturnsFalseForLongTemplateNames) {
-  EXPECT_FALSE(
-      IsReadableTypeName("basic_string<char, std::char_traits<char> >"));
-  EXPECT_FALSE(IsReadableTypeName("std::vector<int, std::alloc_traits<int> >"));
-}
-
-TEST(IsReadableTypeNameTest, ReturnsFalseForLongFunctionTypeNames) {
-  EXPECT_FALSE(IsReadableTypeName("void (&)(int, bool, char, float)"));
-}
-
-// Tests FormatMatcherDescription().
-
-TEST(FormatMatcherDescriptionTest, WorksForEmptyDescription) {
-  EXPECT_EQ("is even",
-            FormatMatcherDescription(false, "IsEven", Strings()));
-  EXPECT_EQ("not (is even)",
-            FormatMatcherDescription(true, "IsEven", Strings()));
-
-  const char* params[] = {"5"};
-  EXPECT_EQ("equals 5",
-            FormatMatcherDescription(false, "Equals",
-                                     Strings(params, params + 1)));
-
-  const char* params2[] = {"5", "8"};
-  EXPECT_EQ("is in range (5, 8)",
-            FormatMatcherDescription(false, "IsInRange",
-                                     Strings(params2, params2 + 2)));
-}
-
-// Tests PolymorphicMatcher::mutable_impl().
-TEST(PolymorphicMatcherTest, CanAccessMutableImpl) {
-  PolymorphicMatcher<DivisibleByImpl> m(DivisibleByImpl(42));
-  DivisibleByImpl& impl = m.mutable_impl();
-  EXPECT_EQ(42, impl.divider());
-
-  impl.set_divider(0);
-  EXPECT_EQ(0, m.mutable_impl().divider());
-}
-
-// Tests PolymorphicMatcher::impl().
-TEST(PolymorphicMatcherTest, CanAccessImpl) {
-  const PolymorphicMatcher<DivisibleByImpl> m(DivisibleByImpl(42));
-  const DivisibleByImpl& impl = m.impl();
-  EXPECT_EQ(42, impl.divider());
-}
-
-TEST(MatcherTupleTest, ExplainsMatchFailure) {
-  stringstream ss1;
-  ExplainMatchFailureTupleTo(
-      std::make_tuple(Matcher<char>(Eq('a')), GreaterThan(5)),
-      std::make_tuple('a', 10), &ss1);
-  EXPECT_EQ("", ss1.str());  // Successful match.
-
-  stringstream ss2;
-  ExplainMatchFailureTupleTo(
-      std::make_tuple(GreaterThan(5), Matcher<char>(Eq('a'))),
-      std::make_tuple(2, 'b'), &ss2);
-  EXPECT_EQ("  Expected arg #0: is > 5\n"
-            "           Actual: 2, which is 3 less than 5\n"
-            "  Expected arg #1: is equal to 'a' (97, 0x61)\n"
-            "           Actual: 'b' (98, 0x62)\n",
-            ss2.str());  // Failed match where both arguments need explanation.
-
-  stringstream ss3;
-  ExplainMatchFailureTupleTo(
-      std::make_tuple(GreaterThan(5), Matcher<char>(Eq('a'))),
-      std::make_tuple(2, 'a'), &ss3);
-  EXPECT_EQ("  Expected arg #0: is > 5\n"
-            "           Actual: 2, which is 3 less than 5\n",
-            ss3.str());  // Failed match where only one argument needs
-                         // explanation.
-}
-
-// Tests Each().
-
-TEST(EachTest, ExplainsMatchResultCorrectly) {
-  set<int> a;  // empty
-
-  Matcher<set<int> > m = Each(2);
-  EXPECT_EQ("", Explain(m, a));
-
-  Matcher<const int(&)[1]> n = Each(1);  // NOLINT
-
-  const int b[1] = {1};
-  EXPECT_EQ("", Explain(n, b));
-
-  n = Each(3);
-  EXPECT_EQ("whose element #0 doesn't match", Explain(n, b));
-
-  a.insert(1);
-  a.insert(2);
-  a.insert(3);
-  m = Each(GreaterThan(0));
-  EXPECT_EQ("", Explain(m, a));
-
-  m = Each(GreaterThan(10));
-  EXPECT_EQ("whose element #0 doesn't match, which is 9 less than 10",
-            Explain(m, a));
-}
-
-TEST(EachTest, DescribesItselfCorrectly) {
-  Matcher<vector<int> > m = Each(1);
-  EXPECT_EQ("only contains elements that is equal to 1", Describe(m));
-
-  Matcher<vector<int> > m2 = Not(m);
-  EXPECT_EQ("contains some element that isn't equal to 1", Describe(m2));
-}
-
-TEST(EachTest, MatchesVectorWhenAllElementsMatch) {
-  vector<int> some_vector;
-  EXPECT_THAT(some_vector, Each(1));
-  some_vector.push_back(3);
-  EXPECT_THAT(some_vector, Not(Each(1)));
-  EXPECT_THAT(some_vector, Each(3));
-  some_vector.push_back(1);
-  some_vector.push_back(2);
-  EXPECT_THAT(some_vector, Not(Each(3)));
-  EXPECT_THAT(some_vector, Each(Lt(3.5)));
-
-  vector<std::string> another_vector;
-  another_vector.push_back("fee");
-  EXPECT_THAT(another_vector, Each(std::string("fee")));
-  another_vector.push_back("fie");
-  another_vector.push_back("foe");
-  another_vector.push_back("fum");
-  EXPECT_THAT(another_vector, Not(Each(std::string("fee"))));
-}
-
-TEST(EachTest, MatchesMapWhenAllElementsMatch) {
-  map<const char*, int> my_map;
-  const char* bar = "a string";
-  my_map[bar] = 2;
-  EXPECT_THAT(my_map, Each(make_pair(bar, 2)));
-
-  map<std::string, int> another_map;
-  EXPECT_THAT(another_map, Each(make_pair(std::string("fee"), 1)));
-  another_map["fee"] = 1;
-  EXPECT_THAT(another_map, Each(make_pair(std::string("fee"), 1)));
-  another_map["fie"] = 2;
-  another_map["foe"] = 3;
-  another_map["fum"] = 4;
-  EXPECT_THAT(another_map, Not(Each(make_pair(std::string("fee"), 1))));
-  EXPECT_THAT(another_map, Not(Each(make_pair(std::string("fum"), 1))));
-  EXPECT_THAT(another_map, Each(Pair(_, Gt(0))));
-}
-
-TEST(EachTest, AcceptsMatcher) {
-  const int a[] = {1, 2, 3};
-  EXPECT_THAT(a, Each(Gt(0)));
-  EXPECT_THAT(a, Not(Each(Gt(1))));
-}
-
-TEST(EachTest, WorksForNativeArrayAsTuple) {
-  const int a[] = {1, 2};
-  const int* const pointer = a;
-  EXPECT_THAT(std::make_tuple(pointer, 2), Each(Gt(0)));
-  EXPECT_THAT(std::make_tuple(pointer, 2), Not(Each(Gt(1))));
-}
-
-TEST(EachTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(Each(Pointee(Gt(0)))));
-  helper.Call(MakeUniquePtrs({1, 2}));
-}
-
-// For testing Pointwise().
-class IsHalfOfMatcher {
- public:
-  template <typename T1, typename T2>
-  bool MatchAndExplain(const std::tuple<T1, T2>& a_pair,
-                       MatchResultListener* listener) const {
-    if (std::get<0>(a_pair) == std::get<1>(a_pair) / 2) {
-      *listener << "where the second is " << std::get<1>(a_pair);
-      return true;
-    } else {
-      *listener << "where the second/2 is " << std::get<1>(a_pair) / 2;
-      return false;
-    }
-  }
-
-  void DescribeTo(ostream* os) const {
-    *os << "are a pair where the first is half of the second";
-  }
-
-  void DescribeNegationTo(ostream* os) const {
-    *os << "are a pair where the first isn't half of the second";
-  }
-};
-
-PolymorphicMatcher<IsHalfOfMatcher> IsHalfOf() {
-  return MakePolymorphicMatcher(IsHalfOfMatcher());
-}
-
-TEST(PointwiseTest, DescribesSelf) {
-  vector<int> rhs;
-  rhs.push_back(1);
-  rhs.push_back(2);
-  rhs.push_back(3);
-  const Matcher<const vector<int>&> m = Pointwise(IsHalfOf(), rhs);
-  EXPECT_EQ("contains 3 values, where each value and its corresponding value "
-            "in { 1, 2, 3 } are a pair where the first is half of the second",
-            Describe(m));
-  EXPECT_EQ("doesn't contain exactly 3 values, or contains a value x at some "
-            "index i where x and the i-th value of { 1, 2, 3 } are a pair "
-            "where the first isn't half of the second",
-            DescribeNegation(m));
-}
-
-TEST(PointwiseTest, MakesCopyOfRhs) {
-  list<signed char> rhs;
-  rhs.push_back(2);
-  rhs.push_back(4);
-
-  int lhs[] = {1, 2};
-  const Matcher<const int (&)[2]> m = Pointwise(IsHalfOf(), rhs);
-  EXPECT_THAT(lhs, m);
-
-  // Changing rhs now shouldn't affect m, which made a copy of rhs.
-  rhs.push_back(6);
-  EXPECT_THAT(lhs, m);
-}
-
-TEST(PointwiseTest, WorksForLhsNativeArray) {
-  const int lhs[] = {1, 2, 3};
-  vector<int> rhs;
-  rhs.push_back(2);
-  rhs.push_back(4);
-  rhs.push_back(6);
-  EXPECT_THAT(lhs, Pointwise(Lt(), rhs));
-  EXPECT_THAT(lhs, Not(Pointwise(Gt(), rhs)));
-}
-
-TEST(PointwiseTest, WorksForRhsNativeArray) {
-  const int rhs[] = {1, 2, 3};
-  vector<int> lhs;
-  lhs.push_back(2);
-  lhs.push_back(4);
-  lhs.push_back(6);
-  EXPECT_THAT(lhs, Pointwise(Gt(), rhs));
-  EXPECT_THAT(lhs, Not(Pointwise(Lt(), rhs)));
-}
-
-// Test is effective only with sanitizers.
-TEST(PointwiseTest, WorksForVectorOfBool) {
-  vector<bool> rhs(3, false);
-  rhs[1] = true;
-  vector<bool> lhs = rhs;
-  EXPECT_THAT(lhs, Pointwise(Eq(), rhs));
-  rhs[0] = true;
-  EXPECT_THAT(lhs, Not(Pointwise(Eq(), rhs)));
-}
-
-
-TEST(PointwiseTest, WorksForRhsInitializerList) {
-  const vector<int> lhs{2, 4, 6};
-  EXPECT_THAT(lhs, Pointwise(Gt(), {1, 2, 3}));
-  EXPECT_THAT(lhs, Not(Pointwise(Lt(), {3, 3, 7})));
-}
-
-
-TEST(PointwiseTest, RejectsWrongSize) {
-  const double lhs[2] = {1, 2};
-  const int rhs[1] = {0};
-  EXPECT_THAT(lhs, Not(Pointwise(Gt(), rhs)));
-  EXPECT_EQ("which contains 2 values",
-            Explain(Pointwise(Gt(), rhs), lhs));
-
-  const int rhs2[3] = {0, 1, 2};
-  EXPECT_THAT(lhs, Not(Pointwise(Gt(), rhs2)));
-}
-
-TEST(PointwiseTest, RejectsWrongContent) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {2, 6, 4};
-  EXPECT_THAT(lhs, Not(Pointwise(IsHalfOf(), rhs)));
-  EXPECT_EQ("where the value pair (2, 6) at index #1 don't match, "
-            "where the second/2 is 3",
-            Explain(Pointwise(IsHalfOf(), rhs), lhs));
-}
-
-TEST(PointwiseTest, AcceptsCorrectContent) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {2, 4, 6};
-  EXPECT_THAT(lhs, Pointwise(IsHalfOf(), rhs));
-  EXPECT_EQ("", Explain(Pointwise(IsHalfOf(), rhs), lhs));
-}
-
-TEST(PointwiseTest, AllowsMonomorphicInnerMatcher) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {2, 4, 6};
-  const Matcher<std::tuple<const double&, const int&>> m1 = IsHalfOf();
-  EXPECT_THAT(lhs, Pointwise(m1, rhs));
-  EXPECT_EQ("", Explain(Pointwise(m1, rhs), lhs));
-
-  // This type works as a std::tuple<const double&, const int&> can be
-  // implicitly cast to std::tuple<double, int>.
-  const Matcher<std::tuple<double, int>> m2 = IsHalfOf();
-  EXPECT_THAT(lhs, Pointwise(m2, rhs));
-  EXPECT_EQ("", Explain(Pointwise(m2, rhs), lhs));
-}
-
-MATCHER(PointeeEquals, "Points to an equal value") {
-  return ExplainMatchResult(::testing::Pointee(::testing::get<1>(arg)),
-                            ::testing::get<0>(arg), result_listener);
-}
-
-TEST(PointwiseTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(Pointwise(PointeeEquals(), std::vector<int>{1, 2})));
-  helper.Call(MakeUniquePtrs({1, 2}));
-}
-
-TEST(UnorderedPointwiseTest, DescribesSelf) {
-  vector<int> rhs;
-  rhs.push_back(1);
-  rhs.push_back(2);
-  rhs.push_back(3);
-  const Matcher<const vector<int>&> m = UnorderedPointwise(IsHalfOf(), rhs);
-  EXPECT_EQ(
-      "has 3 elements and there exists some permutation of elements such "
-      "that:\n"
-      " - element #0 and 1 are a pair where the first is half of the second, "
-      "and\n"
-      " - element #1 and 2 are a pair where the first is half of the second, "
-      "and\n"
-      " - element #2 and 3 are a pair where the first is half of the second",
-      Describe(m));
-  EXPECT_EQ(
-      "doesn't have 3 elements, or there exists no permutation of elements "
-      "such that:\n"
-      " - element #0 and 1 are a pair where the first is half of the second, "
-      "and\n"
-      " - element #1 and 2 are a pair where the first is half of the second, "
-      "and\n"
-      " - element #2 and 3 are a pair where the first is half of the second",
-      DescribeNegation(m));
-}
-
-TEST(UnorderedPointwiseTest, MakesCopyOfRhs) {
-  list<signed char> rhs;
-  rhs.push_back(2);
-  rhs.push_back(4);
-
-  int lhs[] = {2, 1};
-  const Matcher<const int (&)[2]> m = UnorderedPointwise(IsHalfOf(), rhs);
-  EXPECT_THAT(lhs, m);
-
-  // Changing rhs now shouldn't affect m, which made a copy of rhs.
-  rhs.push_back(6);
-  EXPECT_THAT(lhs, m);
-}
-
-TEST(UnorderedPointwiseTest, WorksForLhsNativeArray) {
-  const int lhs[] = {1, 2, 3};
-  vector<int> rhs;
-  rhs.push_back(4);
-  rhs.push_back(6);
-  rhs.push_back(2);
-  EXPECT_THAT(lhs, UnorderedPointwise(Lt(), rhs));
-  EXPECT_THAT(lhs, Not(UnorderedPointwise(Gt(), rhs)));
-}
-
-TEST(UnorderedPointwiseTest, WorksForRhsNativeArray) {
-  const int rhs[] = {1, 2, 3};
-  vector<int> lhs;
-  lhs.push_back(4);
-  lhs.push_back(2);
-  lhs.push_back(6);
-  EXPECT_THAT(lhs, UnorderedPointwise(Gt(), rhs));
-  EXPECT_THAT(lhs, Not(UnorderedPointwise(Lt(), rhs)));
-}
-
-
-TEST(UnorderedPointwiseTest, WorksForRhsInitializerList) {
-  const vector<int> lhs{2, 4, 6};
-  EXPECT_THAT(lhs, UnorderedPointwise(Gt(), {5, 1, 3}));
-  EXPECT_THAT(lhs, Not(UnorderedPointwise(Lt(), {1, 1, 7})));
-}
-
-
-TEST(UnorderedPointwiseTest, RejectsWrongSize) {
-  const double lhs[2] = {1, 2};
-  const int rhs[1] = {0};
-  EXPECT_THAT(lhs, Not(UnorderedPointwise(Gt(), rhs)));
-  EXPECT_EQ("which has 2 elements",
-            Explain(UnorderedPointwise(Gt(), rhs), lhs));
-
-  const int rhs2[3] = {0, 1, 2};
-  EXPECT_THAT(lhs, Not(UnorderedPointwise(Gt(), rhs2)));
-}
-
-TEST(UnorderedPointwiseTest, RejectsWrongContent) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {2, 6, 6};
-  EXPECT_THAT(lhs, Not(UnorderedPointwise(IsHalfOf(), rhs)));
-  EXPECT_EQ("where the following elements don't match any matchers:\n"
-            "element #1: 2",
-            Explain(UnorderedPointwise(IsHalfOf(), rhs), lhs));
-}
-
-TEST(UnorderedPointwiseTest, AcceptsCorrectContentInSameOrder) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {2, 4, 6};
-  EXPECT_THAT(lhs, UnorderedPointwise(IsHalfOf(), rhs));
-}
-
-TEST(UnorderedPointwiseTest, AcceptsCorrectContentInDifferentOrder) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {6, 4, 2};
-  EXPECT_THAT(lhs, UnorderedPointwise(IsHalfOf(), rhs));
-}
-
-TEST(UnorderedPointwiseTest, AllowsMonomorphicInnerMatcher) {
-  const double lhs[3] = {1, 2, 3};
-  const int rhs[3] = {4, 6, 2};
-  const Matcher<std::tuple<const double&, const int&>> m1 = IsHalfOf();
-  EXPECT_THAT(lhs, UnorderedPointwise(m1, rhs));
-
-  // This type works as a std::tuple<const double&, const int&> can be
-  // implicitly cast to std::tuple<double, int>.
-  const Matcher<std::tuple<double, int>> m2 = IsHalfOf();
-  EXPECT_THAT(lhs, UnorderedPointwise(m2, rhs));
-}
-
-TEST(UnorderedPointwiseTest, WorksWithMoveOnly) {
-  ContainerHelper helper;
-  EXPECT_CALL(helper, Call(UnorderedPointwise(PointeeEquals(),
-                                              std::vector<int>{1, 2})));
-  helper.Call(MakeUniquePtrs({2, 1}));
-}
-
-// Sample optional type implementation with minimal requirements for use with
-// Optional matcher.
-template <typename T>
-class SampleOptional {
- public:
-  using value_type = T;
-  explicit SampleOptional(T value)
-      : value_(std::move(value)), has_value_(true) {}
-  SampleOptional() : value_(), has_value_(false) {}
-  operator bool() const { return has_value_; }
-  const T& operator*() const { return value_; }
-
- private:
-  T value_;
-  bool has_value_;
-};
-
-TEST(OptionalTest, DescribesSelf) {
-  const Matcher<SampleOptional<int>> m = Optional(Eq(1));
-  EXPECT_EQ("value is equal to 1", Describe(m));
-}
-
-TEST(OptionalTest, ExplainsSelf) {
-  const Matcher<SampleOptional<int>> m = Optional(Eq(1));
-  EXPECT_EQ("whose value 1 matches", Explain(m, SampleOptional<int>(1)));
-  EXPECT_EQ("whose value 2 doesn't match", Explain(m, SampleOptional<int>(2)));
-}
-
-TEST(OptionalTest, MatchesNonEmptyOptional) {
-  const Matcher<SampleOptional<int>> m1 = Optional(1);
-  const Matcher<SampleOptional<int>> m2 = Optional(Eq(2));
-  const Matcher<SampleOptional<int>> m3 = Optional(Lt(3));
-  SampleOptional<int> opt(1);
-  EXPECT_TRUE(m1.Matches(opt));
-  EXPECT_FALSE(m2.Matches(opt));
-  EXPECT_TRUE(m3.Matches(opt));
-}
-
-TEST(OptionalTest, DoesNotMatchNullopt) {
-  const Matcher<SampleOptional<int>> m = Optional(1);
-  SampleOptional<int> empty;
-  EXPECT_FALSE(m.Matches(empty));
-}
-
-TEST(OptionalTest, WorksWithMoveOnly) {
-  Matcher<SampleOptional<std::unique_ptr<int>>> m = Optional(Eq(nullptr));
-  EXPECT_TRUE(m.Matches(SampleOptional<std::unique_ptr<int>>(nullptr)));
-}
-
-class SampleVariantIntString {
- public:
-  SampleVariantIntString(int i) : i_(i), has_int_(true) {}
-  SampleVariantIntString(const std::string& s) : s_(s), has_int_(false) {}
-
-  template <typename T>
-  friend bool holds_alternative(const SampleVariantIntString& value) {
-    return value.has_int_ == std::is_same<T, int>::value;
-  }
-
-  template <typename T>
-  friend const T& get(const SampleVariantIntString& value) {
-    return value.get_impl(static_cast<T*>(nullptr));
-  }
-
- private:
-  const int& get_impl(int*) const { return i_; }
-  const std::string& get_impl(std::string*) const { return s_; }
-
-  int i_;
-  std::string s_;
-  bool has_int_;
-};
-
-TEST(VariantTest, DescribesSelf) {
-  const Matcher<SampleVariantIntString> m = VariantWith<int>(Eq(1));
-  EXPECT_THAT(Describe(m), ContainsRegex("is a variant<> with value of type "
-                                         "'.*' and the value is equal to 1"));
-}
-
-TEST(VariantTest, ExplainsSelf) {
-  const Matcher<SampleVariantIntString> m = VariantWith<int>(Eq(1));
-  EXPECT_THAT(Explain(m, SampleVariantIntString(1)),
-              ContainsRegex("whose value 1"));
-  EXPECT_THAT(Explain(m, SampleVariantIntString("A")),
-              HasSubstr("whose value is not of type '"));
-  EXPECT_THAT(Explain(m, SampleVariantIntString(2)),
-              "whose value 2 doesn't match");
-}
-
-TEST(VariantTest, FullMatch) {
-  Matcher<SampleVariantIntString> m = VariantWith<int>(Eq(1));
-  EXPECT_TRUE(m.Matches(SampleVariantIntString(1)));
-
-  m = VariantWith<std::string>(Eq("1"));
-  EXPECT_TRUE(m.Matches(SampleVariantIntString("1")));
-}
-
-TEST(VariantTest, TypeDoesNotMatch) {
-  Matcher<SampleVariantIntString> m = VariantWith<int>(Eq(1));
-  EXPECT_FALSE(m.Matches(SampleVariantIntString("1")));
-
-  m = VariantWith<std::string>(Eq("1"));
-  EXPECT_FALSE(m.Matches(SampleVariantIntString(1)));
-}
-
-TEST(VariantTest, InnerDoesNotMatch) {
-  Matcher<SampleVariantIntString> m = VariantWith<int>(Eq(1));
-  EXPECT_FALSE(m.Matches(SampleVariantIntString(2)));
-
-  m = VariantWith<std::string>(Eq("1"));
-  EXPECT_FALSE(m.Matches(SampleVariantIntString("2")));
-}
-
-class SampleAnyType {
- public:
-  explicit SampleAnyType(int i) : index_(0), i_(i) {}
-  explicit SampleAnyType(const std::string& s) : index_(1), s_(s) {}
-
-  template <typename T>
-  friend const T* any_cast(const SampleAnyType* any) {
-    return any->get_impl(static_cast<T*>(nullptr));
-  }
-
- private:
-  int index_;
-  int i_;
-  std::string s_;
-
-  const int* get_impl(int*) const { return index_ == 0 ? &i_ : nullptr; }
-  const std::string* get_impl(std::string*) const {
-    return index_ == 1 ? &s_ : nullptr;
-  }
-};
-
-TEST(AnyWithTest, FullMatch) {
-  Matcher<SampleAnyType> m = AnyWith<int>(Eq(1));
-  EXPECT_TRUE(m.Matches(SampleAnyType(1)));
-}
-
-TEST(AnyWithTest, TestBadCastType) {
-  Matcher<SampleAnyType> m = AnyWith<std::string>(Eq("fail"));
-  EXPECT_FALSE(m.Matches(SampleAnyType(1)));
-}
-
-TEST(AnyWithTest, TestUseInContainers) {
-  std::vector<SampleAnyType> a;
-  a.emplace_back(1);
-  a.emplace_back(2);
-  a.emplace_back(3);
-  EXPECT_THAT(
-      a, ElementsAreArray({AnyWith<int>(1), AnyWith<int>(2), AnyWith<int>(3)}));
-
-  std::vector<SampleAnyType> b;
-  b.emplace_back("hello");
-  b.emplace_back("merhaba");
-  b.emplace_back("salut");
-  EXPECT_THAT(b, ElementsAreArray({AnyWith<std::string>("hello"),
-                                   AnyWith<std::string>("merhaba"),
-                                   AnyWith<std::string>("salut")}));
-}
-TEST(AnyWithTest, TestCompare) {
-  EXPECT_THAT(SampleAnyType(1), AnyWith<int>(Gt(0)));
-}
-
-TEST(AnyWithTest, DescribesSelf) {
-  const Matcher<const SampleAnyType&> m = AnyWith<int>(Eq(1));
-  EXPECT_THAT(Describe(m), ContainsRegex("is an 'any' type with value of type "
-                                         "'.*' and the value is equal to 1"));
-}
-
-TEST(AnyWithTest, ExplainsSelf) {
-  const Matcher<const SampleAnyType&> m = AnyWith<int>(Eq(1));
-
-  EXPECT_THAT(Explain(m, SampleAnyType(1)), ContainsRegex("whose value 1"));
-  EXPECT_THAT(Explain(m, SampleAnyType("A")),
-              HasSubstr("whose value is not of type '"));
-  EXPECT_THAT(Explain(m, SampleAnyType(2)), "whose value 2 doesn't match");
-}
-
-TEST(PointeeTest, WorksOnMoveOnlyType) {
-  std::unique_ptr<int> p(new int(3));
-  EXPECT_THAT(p, Pointee(Eq(3)));
-  EXPECT_THAT(p, Not(Pointee(Eq(2))));
-}
-
-TEST(NotTest, WorksOnMoveOnlyType) {
-  std::unique_ptr<int> p(new int(3));
-  EXPECT_THAT(p, Pointee(Eq(3)));
-  EXPECT_THAT(p, Not(Pointee(Eq(2))));
-}
-
-// Tests Args<k0, ..., kn>(m).
-
-TEST(ArgsTest, AcceptsZeroTemplateArg) {
-  const std::tuple<int, bool> t(5, true);
-  EXPECT_THAT(t, Args<>(Eq(std::tuple<>())));
-  EXPECT_THAT(t, Not(Args<>(Ne(std::tuple<>()))));
-}
-
-TEST(ArgsTest, AcceptsOneTemplateArg) {
-  const std::tuple<int, bool> t(5, true);
-  EXPECT_THAT(t, Args<0>(Eq(std::make_tuple(5))));
-  EXPECT_THAT(t, Args<1>(Eq(std::make_tuple(true))));
-  EXPECT_THAT(t, Not(Args<1>(Eq(std::make_tuple(false)))));
-}
-
-TEST(ArgsTest, AcceptsTwoTemplateArgs) {
-  const std::tuple<short, int, long> t(4, 5, 6L);  // NOLINT
-
-  EXPECT_THAT(t, (Args<0, 1>(Lt())));
-  EXPECT_THAT(t, (Args<1, 2>(Lt())));
-  EXPECT_THAT(t, Not(Args<0, 2>(Gt())));
-}
-
-TEST(ArgsTest, AcceptsRepeatedTemplateArgs) {
-  const std::tuple<short, int, long> t(4, 5, 6L);  // NOLINT
-  EXPECT_THAT(t, (Args<0, 0>(Eq())));
-  EXPECT_THAT(t, Not(Args<1, 1>(Ne())));
-}
-
-TEST(ArgsTest, AcceptsDecreasingTemplateArgs) {
-  const std::tuple<short, int, long> t(4, 5, 6L);  // NOLINT
-  EXPECT_THAT(t, (Args<2, 0>(Gt())));
-  EXPECT_THAT(t, Not(Args<2, 1>(Lt())));
-}
-
-MATCHER(SumIsZero, "") {
-  return std::get<0>(arg) + std::get<1>(arg) + std::get<2>(arg) == 0;
-}
-
-TEST(ArgsTest, AcceptsMoreTemplateArgsThanArityOfOriginalTuple) {
-  EXPECT_THAT(std::make_tuple(-1, 2), (Args<0, 0, 1>(SumIsZero())));
-  EXPECT_THAT(std::make_tuple(1, 2), Not(Args<0, 0, 1>(SumIsZero())));
-}
-
-TEST(ArgsTest, CanBeNested) {
-  const std::tuple<short, int, long, int> t(4, 5, 6L, 6);  // NOLINT
-  EXPECT_THAT(t, (Args<1, 2, 3>(Args<1, 2>(Eq()))));
-  EXPECT_THAT(t, (Args<0, 1, 3>(Args<0, 2>(Lt()))));
-}
-
-TEST(ArgsTest, CanMatchTupleByValue) {
-  typedef std::tuple<char, int, int> Tuple3;
-  const Matcher<Tuple3> m = Args<1, 2>(Lt());
-  EXPECT_TRUE(m.Matches(Tuple3('a', 1, 2)));
-  EXPECT_FALSE(m.Matches(Tuple3('b', 2, 2)));
-}
-
-TEST(ArgsTest, CanMatchTupleByReference) {
-  typedef std::tuple<char, char, int> Tuple3;
-  const Matcher<const Tuple3&> m = Args<0, 1>(Lt());
-  EXPECT_TRUE(m.Matches(Tuple3('a', 'b', 2)));
-  EXPECT_FALSE(m.Matches(Tuple3('b', 'b', 2)));
-}
-
-// Validates that arg is printed as str.
-MATCHER_P(PrintsAs, str, "") {
-  return testing::PrintToString(arg) == str;
-}
-
-TEST(ArgsTest, AcceptsTenTemplateArgs) {
-  EXPECT_THAT(std::make_tuple(0, 1L, 2, 3L, 4, 5, 6, 7, 8, 9),
-              (Args<9, 8, 7, 6, 5, 4, 3, 2, 1, 0>(
-                  PrintsAs("(9, 8, 7, 6, 5, 4, 3, 2, 1, 0)"))));
-  EXPECT_THAT(std::make_tuple(0, 1L, 2, 3L, 4, 5, 6, 7, 8, 9),
-              Not(Args<9, 8, 7, 6, 5, 4, 3, 2, 1, 0>(
-                  PrintsAs("(0, 8, 7, 6, 5, 4, 3, 2, 1, 0)"))));
-}
-
-TEST(ArgsTest, DescirbesSelfCorrectly) {
-  const Matcher<std::tuple<int, bool, char> > m = Args<2, 0>(Lt());
-  EXPECT_EQ("are a tuple whose fields (#2, #0) are a pair where "
-            "the first < the second",
-            Describe(m));
-}
-
-TEST(ArgsTest, DescirbesNestedArgsCorrectly) {
-  const Matcher<const std::tuple<int, bool, char, int>&> m =
-      Args<0, 2, 3>(Args<2, 0>(Lt()));
-  EXPECT_EQ("are a tuple whose fields (#0, #2, #3) are a tuple "
-            "whose fields (#2, #0) are a pair where the first < the second",
-            Describe(m));
-}
-
-TEST(ArgsTest, DescribesNegationCorrectly) {
-  const Matcher<std::tuple<int, char> > m = Args<1, 0>(Gt());
-  EXPECT_EQ("are a tuple whose fields (#1, #0) aren't a pair "
-            "where the first > the second",
-            DescribeNegation(m));
-}
-
-TEST(ArgsTest, ExplainsMatchResultWithoutInnerExplanation) {
-  const Matcher<std::tuple<bool, int, int> > m = Args<1, 2>(Eq());
-  EXPECT_EQ("whose fields (#1, #2) are (42, 42)",
-            Explain(m, std::make_tuple(false, 42, 42)));
-  EXPECT_EQ("whose fields (#1, #2) are (42, 43)",
-            Explain(m, std::make_tuple(false, 42, 43)));
-}
-
-// For testing Args<>'s explanation.
-class LessThanMatcher : public MatcherInterface<std::tuple<char, int> > {
- public:
-  void DescribeTo(::std::ostream* /*os*/) const override {}
-
-  bool MatchAndExplain(std::tuple<char, int> value,
-                       MatchResultListener* listener) const override {
-    const int diff = std::get<0>(value) - std::get<1>(value);
-    if (diff > 0) {
-      *listener << "where the first value is " << diff
-                << " more than the second";
-    }
-    return diff < 0;
-  }
-};
-
-Matcher<std::tuple<char, int> > LessThan() {
-  return MakeMatcher(new LessThanMatcher);
-}
-
-TEST(ArgsTest, ExplainsMatchResultWithInnerExplanation) {
-  const Matcher<std::tuple<char, int, int> > m = Args<0, 2>(LessThan());
-  EXPECT_EQ(
-      "whose fields (#0, #2) are ('a' (97, 0x61), 42), "
-      "where the first value is 55 more than the second",
-      Explain(m, std::make_tuple('a', 42, 42)));
-  EXPECT_EQ("whose fields (#0, #2) are ('\\0', 43)",
-            Explain(m, std::make_tuple('\0', 42, 43)));
-}
-
-class PredicateFormatterFromMatcherTest : public ::testing::Test {
- protected:
-  enum Behavior { kInitialSuccess, kAlwaysFail, kFlaky };
-
-  // A matcher that can return different results when used multiple times on the
-  // same input. No real matcher should do this; but this lets us test that we
-  // detect such behavior and fail appropriately.
-  class MockMatcher : public MatcherInterface<Behavior> {
-   public:
-    bool MatchAndExplain(Behavior behavior,
-                         MatchResultListener* listener) const override {
-      *listener << "[MatchAndExplain]";
-      switch (behavior) {
-        case kInitialSuccess:
-          // The first call to MatchAndExplain should use a "not interested"
-          // listener; so this is expected to return |true|. There should be no
-          // subsequent calls.
-          return !listener->IsInterested();
-
-        case kAlwaysFail:
-          return false;
-
-        case kFlaky:
-          // The first call to MatchAndExplain should use a "not interested"
-          // listener; so this will return |false|. Subsequent calls should have
-          // an "interested" listener; so this will return |true|, thus
-          // simulating a flaky matcher.
-          return listener->IsInterested();
-      }
-
-      GTEST_LOG_(FATAL) << "This should never be reached";
-      return false;
-    }
-
-    void DescribeTo(ostream* os) const override { *os << "[DescribeTo]"; }
-
-    void DescribeNegationTo(ostream* os) const override {
-      *os << "[DescribeNegationTo]";
-    }
-  };
-
-  AssertionResult RunPredicateFormatter(Behavior behavior) {
-    auto matcher = MakeMatcher(new MockMatcher);
-    PredicateFormatterFromMatcher<Matcher<Behavior>> predicate_formatter(
-        matcher);
-    return predicate_formatter("dummy-name", behavior);
-  }
-};
-
-TEST_F(PredicateFormatterFromMatcherTest, ShortCircuitOnSuccess) {
-  AssertionResult result = RunPredicateFormatter(kInitialSuccess);
-  EXPECT_TRUE(result);  // Implicit cast to bool.
-  std::string expect;
-  EXPECT_EQ(expect, result.message());
-}
-
-TEST_F(PredicateFormatterFromMatcherTest, NoShortCircuitOnFailure) {
-  AssertionResult result = RunPredicateFormatter(kAlwaysFail);
-  EXPECT_FALSE(result);  // Implicit cast to bool.
-  std::string expect =
-      "Value of: dummy-name\nExpected: [DescribeTo]\n"
-      "  Actual: 1" +
-      OfType(internal::GetTypeName<Behavior>()) + ", [MatchAndExplain]";
-  EXPECT_EQ(expect, result.message());
-}
-
-TEST_F(PredicateFormatterFromMatcherTest, DetectsFlakyShortCircuit) {
-  AssertionResult result = RunPredicateFormatter(kFlaky);
-  EXPECT_FALSE(result);  // Implicit cast to bool.
-  std::string expect =
-      "Value of: dummy-name\nExpected: [DescribeTo]\n"
-      "  The matcher failed on the initial attempt; but passed when rerun to "
-      "generate the explanation.\n"
-      "  Actual: 2" +
-      OfType(internal::GetTypeName<Behavior>()) + ", [MatchAndExplain]";
-  EXPECT_EQ(expect, result.message());
-}
-
-// Tests for ElementsAre().
-
-TEST(ElementsAreTest, CanDescribeExpectingNoElement) {
-  Matcher<const vector<int>&> m = ElementsAre();
-  EXPECT_EQ("is empty", Describe(m));
-}
-
-TEST(ElementsAreTest, CanDescribeExpectingOneElement) {
-  Matcher<vector<int>> m = ElementsAre(Gt(5));
-  EXPECT_EQ("has 1 element that is > 5", Describe(m));
-}
-
-TEST(ElementsAreTest, CanDescribeExpectingManyElements) {
-  Matcher<list<std::string>> m = ElementsAre(StrEq("one"), "two");
-  EXPECT_EQ(
-      "has 2 elements where\n"
-      "element #0 is equal to \"one\",\n"
-      "element #1 is equal to \"two\"",
-      Describe(m));
-}
-
-TEST(ElementsAreTest, CanDescribeNegationOfExpectingNoElement) {
-  Matcher<vector<int>> m = ElementsAre();
-  EXPECT_EQ("isn't empty", DescribeNegation(m));
-}
-
-TEST(ElementsAreTest, CanDescribeNegationOfExpectingOneElment) {
-  Matcher<const list<int>&> m = ElementsAre(Gt(5));
-  EXPECT_EQ(
-      "doesn't have 1 element, or\n"
-      "element #0 isn't > 5",
-      DescribeNegation(m));
-}
-
-TEST(ElementsAreTest, CanDescribeNegationOfExpectingManyElements) {
-  Matcher<const list<std::string>&> m = ElementsAre("one", "two");
-  EXPECT_EQ(
-      "doesn't have 2 elements, or\n"
-      "element #0 isn't equal to \"one\", or\n"
-      "element #1 isn't equal to \"two\"",
-      DescribeNegation(m));
-}
-
-TEST(ElementsAreTest, DoesNotExplainTrivialMatch) {
-  Matcher<const list<int>&> m = ElementsAre(1, Ne(2));
-
-  list<int> test_list;
-  test_list.push_back(1);
-  test_list.push_back(3);
-  EXPECT_EQ("", Explain(m, test_list));  // No need to explain anything.
-}
-
-TEST(ElementsAreTest, ExplainsNonTrivialMatch) {
-  Matcher<const vector<int>&> m =
-      ElementsAre(GreaterThan(1), 0, GreaterThan(2));
-
-  const int a[] = {10, 0, 100};
-  vector<int> test_vector(std::begin(a), std::end(a));
-  EXPECT_EQ(
-      "whose element #0 matches, which is 9 more than 1,\n"
-      "and whose element #2 matches, which is 98 more than 2",
-      Explain(m, test_vector));
-}
-
-TEST(ElementsAreTest, CanExplainMismatchWrongSize) {
-  Matcher<const list<int>&> m = ElementsAre(1, 3);
-
-  list<int> test_list;
-  // No need to explain when the container is empty.
-  EXPECT_EQ("", Explain(m, test_list));
-
-  test_list.push_back(1);
-  EXPECT_EQ("which has 1 element", Explain(m, test_list));
-}
-
-TEST(ElementsAreTest, CanExplainMismatchRightSize) {
-  Matcher<const vector<int>&> m = ElementsAre(1, GreaterThan(5));
-
-  vector<int> v;
-  v.push_back(2);
-  v.push_back(1);
-  EXPECT_EQ("whose element #0 doesn't match", Explain(m, v));
-
-  v[0] = 1;
-  EXPECT_EQ("whose element #1 doesn't match, which is 4 less than 5",
-            Explain(m, v));
-}
-
-TEST(ElementsAreTest, MatchesOneElementVector) {
-  vector<std::string> test_vector;
-  test_vector.push_back("test string");
-
-  EXPECT_THAT(test_vector, ElementsAre(StrEq("test string")));
-}
-
-TEST(ElementsAreTest, MatchesOneElementList) {
-  list<std::string> test_list;
-  test_list.push_back("test string");
-
-  EXPECT_THAT(test_list, ElementsAre("test string"));
-}
-
-TEST(ElementsAreTest, MatchesThreeElementVector) {
-  vector<std::string> test_vector;
-  test_vector.push_back("one");
-  test_vector.push_back("two");
-  test_vector.push_back("three");
-
-  EXPECT_THAT(test_vector, ElementsAre("one", StrEq("two"), _));
-}
-
-TEST(ElementsAreTest, MatchesOneElementEqMatcher) {
-  vector<int> test_vector;
-  test_vector.push_back(4);
-
-  EXPECT_THAT(test_vector, ElementsAre(Eq(4)));
-}
-
-TEST(ElementsAreTest, MatchesOneElementAnyMatcher) {
-  vector<int> test_vector;
-  test_vector.push_back(4);
-
-  EXPECT_THAT(test_vector, ElementsAre(_));
-}
-
-TEST(ElementsAreTest, MatchesOneElementValue) {
-  vector<int> test_vector;
-  test_vector.push_back(4);
-
-  EXPECT_THAT(test_vector, ElementsAre(4));
-}
-
-TEST(ElementsAreTest, MatchesThreeElementsMixedMatchers) {
-  vector<int> test_vector;
-  test_vector.push_back(1);
-  test_vector.push_back(2);
-  test_vector.push_back(3);
-
-  EXPECT_THAT(test_vector, ElementsAre(1, Eq(2), _));
-}
-
-TEST(ElementsAreTest, MatchesTenElementVector) {
-  const int a[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
-  vector<int> test_vector(std::begin(a), std::end(a));
-
-  EXPECT_THAT(test_vector,
-              // The element list can contain values and/or matchers
-              // of different types.
-              ElementsAre(0, Ge(0), _, 3, 4, Ne(2), Eq(6), 7, 8, _));
-}
-
-TEST(ElementsAreTest, DoesNotMatchWrongSize) {
-  vector<std::string> test_vector;
-  test_vector.push_back("test string");
-  test_vector.push_back("test string");
-
-  Matcher<vector<std::string>> m = ElementsAre(StrEq("test string"));
-  EXPECT_FALSE(m.Matches(test_vector));
-}
-
-TEST(ElementsAreTest, DoesNotMatchWrongValue) {
-  vector<std::string> test_vector;
-  test_vector.push_back("other string");
-
-  Matcher<vector<std::string>> m = ElementsAre(StrEq("test string"));
-  EXPECT_FALSE(m.Matches(test_vector));
-}
-
-TEST(ElementsAreTest, DoesNotMatchWrongOrder) {
-  vector<std::string> test_vector;
-  test_vector.push_back("one");
-  test_vector.push_back("three");
-  test_vector.push_back("two");
-
-  Matcher<vector<std::string>> m =
-      ElementsAre(StrEq("one"), StrEq("two"), StrEq("three"));
-  EXPECT_FALSE(m.Matches(test_vector));
-}
-
-TEST(ElementsAreTest, WorksForNestedContainer) {
-  constexpr std::array<const char*, 2> strings = {{"Hi", "world"}};
-
-  vector<list<char>> nested;
-  for (const auto& s : strings) {
-    nested.emplace_back(s, s + strlen(s));
-  }
-
-  EXPECT_THAT(nested, ElementsAre(ElementsAre('H', Ne('e')),
-                                  ElementsAre('w', 'o', _, _, 'd')));
-  EXPECT_THAT(nested, Not(ElementsAre(ElementsAre('H', 'e'),
-                                      ElementsAre('w', 'o', _, _, 'd'))));
-}
-
-TEST(ElementsAreTest, WorksWithByRefElementMatchers) {
-  int a[] = {0, 1, 2};
-  vector<int> v(std::begin(a), std::end(a));
-
-  EXPECT_THAT(v, ElementsAre(Ref(v[0]), Ref(v[1]), Ref(v[2])));
-  EXPECT_THAT(v, Not(ElementsAre(Ref(v[0]), Ref(v[1]), Ref(a[2]))));
-}
-
-TEST(ElementsAreTest, WorksWithContainerPointerUsingPointee) {
-  int a[] = {0, 1, 2};
-  vector<int> v(std::begin(a), std::end(a));
-
-  EXPECT_THAT(&v, Pointee(ElementsAre(0, 1, _)));
-  EXPECT_THAT(&v, Not(Pointee(ElementsAre(0, _, 3))));
-}
-
-TEST(ElementsAreTest, WorksWithNativeArrayPassedByReference) {
-  int array[] = {0, 1, 2};
-  EXPECT_THAT(array, ElementsAre(0, 1, _));
-  EXPECT_THAT(array, Not(ElementsAre(1, _, _)));
-  EXPECT_THAT(array, Not(ElementsAre(0, _)));
-}
-
-class NativeArrayPassedAsPointerAndSize {
- public:
-  NativeArrayPassedAsPointerAndSize() {}
-
-  MOCK_METHOD(void, Helper, (int* array, int size));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(NativeArrayPassedAsPointerAndSize);
-};
-
-TEST(ElementsAreTest, WorksWithNativeArrayPassedAsPointerAndSize) {
-  int array[] = {0, 1};
-  ::std::tuple<int*, size_t> array_as_tuple(array, 2);
-  EXPECT_THAT(array_as_tuple, ElementsAre(0, 1));
-  EXPECT_THAT(array_as_tuple, Not(ElementsAre(0)));
-
-  NativeArrayPassedAsPointerAndSize helper;
-  EXPECT_CALL(helper, Helper(_, _)).With(ElementsAre(0, 1));
-  helper.Helper(array, 2);
-}
-
-TEST(ElementsAreTest, WorksWithTwoDimensionalNativeArray) {
-  const char a2[][3] = {"hi", "lo"};
-  EXPECT_THAT(a2, ElementsAre(ElementsAre('h', 'i', '\0'),
-                              ElementsAre('l', 'o', '\0')));
-  EXPECT_THAT(a2, ElementsAre(StrEq("hi"), StrEq("lo")));
-  EXPECT_THAT(a2, ElementsAre(Not(ElementsAre('h', 'o', '\0')),
-                              ElementsAre('l', 'o', '\0')));
-}
-
-TEST(ElementsAreTest, AcceptsStringLiteral) {
-  std::string array[] = {"hi", "one", "two"};
-  EXPECT_THAT(array, ElementsAre("hi", "one", "two"));
-  EXPECT_THAT(array, Not(ElementsAre("hi", "one", "too")));
-}
-
-// Declared here with the size unknown.  Defined AFTER the following test.
-extern const char kHi[];
-
-TEST(ElementsAreTest, AcceptsArrayWithUnknownSize) {
-  // The size of kHi is not known in this test, but ElementsAre() should
-  // still accept it.
-
-  std::string array1[] = {"hi"};
-  EXPECT_THAT(array1, ElementsAre(kHi));
-
-  std::string array2[] = {"ho"};
-  EXPECT_THAT(array2, Not(ElementsAre(kHi)));
-}
-
-const char kHi[] = "hi";
-
-TEST(ElementsAreTest, MakesCopyOfArguments) {
-  int x = 1;
-  int y = 2;
-  // This should make a copy of x and y.
-  ::testing::internal::ElementsAreMatcher<std::tuple<int, int>>
-      polymorphic_matcher = ElementsAre(x, y);
-  // Changing x and y now shouldn't affect the meaning of the above matcher.
-  x = y = 0;
-  const int array1[] = {1, 2};
-  EXPECT_THAT(array1, polymorphic_matcher);
-  const int array2[] = {0, 0};
-  EXPECT_THAT(array2, Not(polymorphic_matcher));
-}
-
-// Tests for ElementsAreArray().  Since ElementsAreArray() shares most
-// of the implementation with ElementsAre(), we don't test it as
-// thoroughly here.
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithValueArray) {
-  const int a[] = {1, 2, 3};
-
-  vector<int> test_vector(std::begin(a), std::end(a));
-  EXPECT_THAT(test_vector, ElementsAreArray(a));
-
-  test_vector[2] = 0;
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(a)));
-}
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithArraySize) {
-  std::array<const char*, 3> a = {{"one", "two", "three"}};
-
-  vector<std::string> test_vector(std::begin(a), std::end(a));
-  EXPECT_THAT(test_vector, ElementsAreArray(a.data(), a.size()));
-
-  const char** p = a.data();
-  test_vector[0] = "1";
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(p, a.size())));
-}
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithoutArraySize) {
-  const char* a[] = {"one", "two", "three"};
-
-  vector<std::string> test_vector(std::begin(a), std::end(a));
-  EXPECT_THAT(test_vector, ElementsAreArray(a));
-
-  test_vector[0] = "1";
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(a)));
-}
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithMatcherArray) {
-  const Matcher<std::string> kMatcherArray[] = {StrEq("one"), StrEq("two"),
-                                                StrEq("three")};
-
-  vector<std::string> test_vector;
-  test_vector.push_back("one");
-  test_vector.push_back("two");
-  test_vector.push_back("three");
-  EXPECT_THAT(test_vector, ElementsAreArray(kMatcherArray));
-
-  test_vector.push_back("three");
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(kMatcherArray)));
-}
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithVector) {
-  const int a[] = {1, 2, 3};
-  vector<int> test_vector(std::begin(a), std::end(a));
-  const vector<int> expected(std::begin(a), std::end(a));
-  EXPECT_THAT(test_vector, ElementsAreArray(expected));
-  test_vector.push_back(4);
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(expected)));
-}
-
-TEST(ElementsAreArrayTest, TakesInitializerList) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  EXPECT_THAT(a, ElementsAreArray({1, 2, 3, 4, 5}));
-  EXPECT_THAT(a, Not(ElementsAreArray({1, 2, 3, 5, 4})));
-  EXPECT_THAT(a, Not(ElementsAreArray({1, 2, 3, 4, 6})));
-}
-
-TEST(ElementsAreArrayTest, TakesInitializerListOfCStrings) {
-  const std::string a[5] = {"a", "b", "c", "d", "e"};
-  EXPECT_THAT(a, ElementsAreArray({"a", "b", "c", "d", "e"}));
-  EXPECT_THAT(a, Not(ElementsAreArray({"a", "b", "c", "e", "d"})));
-  EXPECT_THAT(a, Not(ElementsAreArray({"a", "b", "c", "d", "ef"})));
-}
-
-TEST(ElementsAreArrayTest, TakesInitializerListOfSameTypedMatchers) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  EXPECT_THAT(a, ElementsAreArray({Eq(1), Eq(2), Eq(3), Eq(4), Eq(5)}));
-  EXPECT_THAT(a, Not(ElementsAreArray({Eq(1), Eq(2), Eq(3), Eq(4), Eq(6)})));
-}
-
-TEST(ElementsAreArrayTest, TakesInitializerListOfDifferentTypedMatchers) {
-  const int a[5] = {1, 2, 3, 4, 5};
-  // The compiler cannot infer the type of the initializer list if its
-  // elements have different types.  We must explicitly specify the
-  // unified element type in this case.
-  EXPECT_THAT(
-      a, ElementsAreArray<Matcher<int>>({Eq(1), Ne(-2), Ge(3), Le(4), Eq(5)}));
-  EXPECT_THAT(a, Not(ElementsAreArray<Matcher<int>>(
-                     {Eq(1), Ne(-2), Ge(3), Le(4), Eq(6)})));
-}
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithMatcherVector) {
-  const int a[] = {1, 2, 3};
-  const Matcher<int> kMatchers[] = {Eq(1), Eq(2), Eq(3)};
-  vector<int> test_vector(std::begin(a), std::end(a));
-  const vector<Matcher<int>> expected(std::begin(kMatchers),
-                                      std::end(kMatchers));
-  EXPECT_THAT(test_vector, ElementsAreArray(expected));
-  test_vector.push_back(4);
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(expected)));
-}
-
-TEST(ElementsAreArrayTest, CanBeCreatedWithIteratorRange) {
-  const int a[] = {1, 2, 3};
-  const vector<int> test_vector(std::begin(a), std::end(a));
-  const vector<int> expected(std::begin(a), std::end(a));
-  EXPECT_THAT(test_vector, ElementsAreArray(expected.begin(), expected.end()));
-  // Pointers are iterators, too.
-  EXPECT_THAT(test_vector, ElementsAreArray(std::begin(a), std::end(a)));
-  // The empty range of NULL pointers should also be okay.
-  int* const null_int = nullptr;
-  EXPECT_THAT(test_vector, Not(ElementsAreArray(null_int, null_int)));
-  EXPECT_THAT((vector<int>()), ElementsAreArray(null_int, null_int));
-}
-
-// Since ElementsAre() and ElementsAreArray() share much of the
-// implementation, we only do a sanity test for native arrays here.
-TEST(ElementsAreArrayTest, WorksWithNativeArray) {
-  ::std::string a[] = {"hi", "ho"};
-  ::std::string b[] = {"hi", "ho"};
-
-  EXPECT_THAT(a, ElementsAreArray(b));
-  EXPECT_THAT(a, ElementsAreArray(b, 2));
-  EXPECT_THAT(a, Not(ElementsAreArray(b, 1)));
-}
-
-TEST(ElementsAreArrayTest, SourceLifeSpan) {
-  const int a[] = {1, 2, 3};
-  vector<int> test_vector(std::begin(a), std::end(a));
-  vector<int> expect(std::begin(a), std::end(a));
-  ElementsAreArrayMatcher<int> matcher_maker =
-      ElementsAreArray(expect.begin(), expect.end());
-  EXPECT_THAT(test_vector, matcher_maker);
-  // Changing in place the values that initialized matcher_maker should not
-  // affect matcher_maker anymore. It should have made its own copy of them.
-  for (int& i : expect) {
-    i += 10;
-  }
-  EXPECT_THAT(test_vector, matcher_maker);
-  test_vector.push_back(3);
-  EXPECT_THAT(test_vector, Not(matcher_maker));
-}
-
-// Tests for the MATCHER*() macro family.
-
-// Tests that a simple MATCHER() definition works.
-
-MATCHER(IsEven, "") { return (arg % 2) == 0; }
-
-TEST(MatcherMacroTest, Works) {
-  const Matcher<int> m = IsEven();
-  EXPECT_TRUE(m.Matches(6));
-  EXPECT_FALSE(m.Matches(7));
-
-  EXPECT_EQ("is even", Describe(m));
-  EXPECT_EQ("not (is even)", DescribeNegation(m));
-  EXPECT_EQ("", Explain(m, 6));
-  EXPECT_EQ("", Explain(m, 7));
-}
-
-// This also tests that the description string can reference 'negation'.
-MATCHER(IsEven2, negation ? "is odd" : "is even") {
-  if ((arg % 2) == 0) {
-    // Verifies that we can stream to result_listener, a listener
-    // supplied by the MATCHER macro implicitly.
-    *result_listener << "OK";
-    return true;
-  } else {
-    *result_listener << "% 2 == " << (arg % 2);
-    return false;
-  }
-}
-
-// This also tests that the description string can reference matcher
-// parameters.
-MATCHER_P2(EqSumOf, x, y,
-           std::string(negation ? "doesn't equal" : "equals") + " the sum of " +
-               PrintToString(x) + " and " + PrintToString(y)) {
-  if (arg == (x + y)) {
-    *result_listener << "OK";
-    return true;
-  } else {
-    // Verifies that we can stream to the underlying stream of
-    // result_listener.
-    if (result_listener->stream() != nullptr) {
-      *result_listener->stream() << "diff == " << (x + y - arg);
-    }
-    return false;
-  }
-}
-
-// Tests that the matcher description can reference 'negation' and the
-// matcher parameters.
-TEST(MatcherMacroTest, DescriptionCanReferenceNegationAndParameters) {
-  const Matcher<int> m1 = IsEven2();
-  EXPECT_EQ("is even", Describe(m1));
-  EXPECT_EQ("is odd", DescribeNegation(m1));
-
-  const Matcher<int> m2 = EqSumOf(5, 9);
-  EXPECT_EQ("equals the sum of 5 and 9", Describe(m2));
-  EXPECT_EQ("doesn't equal the sum of 5 and 9", DescribeNegation(m2));
-}
-
-// Tests explaining match result in a MATCHER* macro.
-TEST(MatcherMacroTest, CanExplainMatchResult) {
-  const Matcher<int> m1 = IsEven2();
-  EXPECT_EQ("OK", Explain(m1, 4));
-  EXPECT_EQ("% 2 == 1", Explain(m1, 5));
-
-  const Matcher<int> m2 = EqSumOf(1, 2);
-  EXPECT_EQ("OK", Explain(m2, 3));
-  EXPECT_EQ("diff == -1", Explain(m2, 4));
-}
-
-// Tests that the body of MATCHER() can reference the type of the
-// value being matched.
-
-MATCHER(IsEmptyString, "") {
-  StaticAssertTypeEq<::std::string, arg_type>();
-  return arg.empty();
-}
-
-MATCHER(IsEmptyStringByRef, "") {
-  StaticAssertTypeEq<const ::std::string&, arg_type>();
-  return arg.empty();
-}
-
-TEST(MatcherMacroTest, CanReferenceArgType) {
-  const Matcher<::std::string> m1 = IsEmptyString();
-  EXPECT_TRUE(m1.Matches(""));
-
-  const Matcher<const ::std::string&> m2 = IsEmptyStringByRef();
-  EXPECT_TRUE(m2.Matches(""));
-}
-
-// Tests that MATCHER() can be used in a namespace.
-
-namespace matcher_test {
-MATCHER(IsOdd, "") { return (arg % 2) != 0; }
-}  // namespace matcher_test
-
-TEST(MatcherMacroTest, WorksInNamespace) {
-  Matcher<int> m = matcher_test::IsOdd();
-  EXPECT_FALSE(m.Matches(4));
-  EXPECT_TRUE(m.Matches(5));
-}
-
-// Tests that Value() can be used to compose matchers.
-MATCHER(IsPositiveOdd, "") {
-  return Value(arg, matcher_test::IsOdd()) && arg > 0;
-}
-
-TEST(MatcherMacroTest, CanBeComposedUsingValue) {
-  EXPECT_THAT(3, IsPositiveOdd());
-  EXPECT_THAT(4, Not(IsPositiveOdd()));
-  EXPECT_THAT(-1, Not(IsPositiveOdd()));
-}
-
-// Tests that a simple MATCHER_P() definition works.
-
-MATCHER_P(IsGreaterThan32And, n, "") { return arg > 32 && arg > n; }
-
-TEST(MatcherPMacroTest, Works) {
-  const Matcher<int> m = IsGreaterThan32And(5);
-  EXPECT_TRUE(m.Matches(36));
-  EXPECT_FALSE(m.Matches(5));
-
-  EXPECT_EQ("is greater than 32 and 5", Describe(m));
-  EXPECT_EQ("not (is greater than 32 and 5)", DescribeNegation(m));
-  EXPECT_EQ("", Explain(m, 36));
-  EXPECT_EQ("", Explain(m, 5));
-}
-
-// Tests that the description is calculated correctly from the matcher name.
-MATCHER_P(_is_Greater_Than32and_, n, "") { return arg > 32 && arg > n; }
-
-TEST(MatcherPMacroTest, GeneratesCorrectDescription) {
-  const Matcher<int> m = _is_Greater_Than32and_(5);
-
-  EXPECT_EQ("is greater than 32 and 5", Describe(m));
-  EXPECT_EQ("not (is greater than 32 and 5)", DescribeNegation(m));
-  EXPECT_EQ("", Explain(m, 36));
-  EXPECT_EQ("", Explain(m, 5));
-}
-
-// Tests that a MATCHER_P matcher can be explicitly instantiated with
-// a reference parameter type.
-
-class UncopyableFoo {
- public:
-  explicit UncopyableFoo(char value) : value_(value) { (void)value_; }
-
-  UncopyableFoo(const UncopyableFoo&) = delete;
-  void operator=(const UncopyableFoo&) = delete;
-
- private:
-  char value_;
-};
-
-MATCHER_P(ReferencesUncopyable, variable, "") { return &arg == &variable; }
-
-TEST(MatcherPMacroTest, WorksWhenExplicitlyInstantiatedWithReference) {
-  UncopyableFoo foo1('1'), foo2('2');
-  const Matcher<const UncopyableFoo&> m =
-      ReferencesUncopyable<const UncopyableFoo&>(foo1);
-
-  EXPECT_TRUE(m.Matches(foo1));
-  EXPECT_FALSE(m.Matches(foo2));
-
-  // We don't want the address of the parameter printed, as most
-  // likely it will just annoy the user.  If the address is
-  // interesting, the user should consider passing the parameter by
-  // pointer instead.
-  EXPECT_EQ("references uncopyable 1-byte object <31>", Describe(m));
-}
-
-// Tests that the body of MATCHER_Pn() can reference the parameter
-// types.
-
-MATCHER_P3(ParamTypesAreIntLongAndChar, foo, bar, baz, "") {
-  StaticAssertTypeEq<int, foo_type>();
-  StaticAssertTypeEq<long, bar_type>();  // NOLINT
-  StaticAssertTypeEq<char, baz_type>();
-  return arg == 0;
-}
-
-TEST(MatcherPnMacroTest, CanReferenceParamTypes) {
-  EXPECT_THAT(0, ParamTypesAreIntLongAndChar(10, 20L, 'a'));
-}
-
-// Tests that a MATCHER_Pn matcher can be explicitly instantiated with
-// reference parameter types.
-
-MATCHER_P2(ReferencesAnyOf, variable1, variable2, "") {
-  return &arg == &variable1 || &arg == &variable2;
-}
-
-TEST(MatcherPnMacroTest, WorksWhenExplicitlyInstantiatedWithReferences) {
-  UncopyableFoo foo1('1'), foo2('2'), foo3('3');
-  const Matcher<const UncopyableFoo&> const_m =
-      ReferencesAnyOf<const UncopyableFoo&, const UncopyableFoo&>(foo1, foo2);
-
-  EXPECT_TRUE(const_m.Matches(foo1));
-  EXPECT_TRUE(const_m.Matches(foo2));
-  EXPECT_FALSE(const_m.Matches(foo3));
-
-  const Matcher<UncopyableFoo&> m =
-      ReferencesAnyOf<UncopyableFoo&, UncopyableFoo&>(foo1, foo2);
-
-  EXPECT_TRUE(m.Matches(foo1));
-  EXPECT_TRUE(m.Matches(foo2));
-  EXPECT_FALSE(m.Matches(foo3));
-}
-
-TEST(MatcherPnMacroTest,
-     GeneratesCorretDescriptionWhenExplicitlyInstantiatedWithReferences) {
-  UncopyableFoo foo1('1'), foo2('2');
-  const Matcher<const UncopyableFoo&> m =
-      ReferencesAnyOf<const UncopyableFoo&, const UncopyableFoo&>(foo1, foo2);
-
-  // We don't want the addresses of the parameters printed, as most
-  // likely they will just annoy the user.  If the addresses are
-  // interesting, the user should consider passing the parameters by
-  // pointers instead.
-  EXPECT_EQ("references any of (1-byte object <31>, 1-byte object <32>)",
-            Describe(m));
-}
-
-// Tests that a simple MATCHER_P2() definition works.
-
-MATCHER_P2(IsNotInClosedRange, low, hi, "") { return arg < low || arg > hi; }
-
-TEST(MatcherPnMacroTest, Works) {
-  const Matcher<const long&> m = IsNotInClosedRange(10, 20);  // NOLINT
-  EXPECT_TRUE(m.Matches(36L));
-  EXPECT_FALSE(m.Matches(15L));
-
-  EXPECT_EQ("is not in closed range (10, 20)", Describe(m));
-  EXPECT_EQ("not (is not in closed range (10, 20))", DescribeNegation(m));
-  EXPECT_EQ("", Explain(m, 36L));
-  EXPECT_EQ("", Explain(m, 15L));
-}
-
-// Tests that MATCHER*() definitions can be overloaded on the number
-// of parameters; also tests MATCHER_Pn() where n >= 3.
-
-MATCHER(EqualsSumOf, "") { return arg == 0; }
-MATCHER_P(EqualsSumOf, a, "") { return arg == a; }
-MATCHER_P2(EqualsSumOf, a, b, "") { return arg == a + b; }
-MATCHER_P3(EqualsSumOf, a, b, c, "") { return arg == a + b + c; }
-MATCHER_P4(EqualsSumOf, a, b, c, d, "") { return arg == a + b + c + d; }
-MATCHER_P5(EqualsSumOf, a, b, c, d, e, "") { return arg == a + b + c + d + e; }
-MATCHER_P6(EqualsSumOf, a, b, c, d, e, f, "") {
-  return arg == a + b + c + d + e + f;
-}
-MATCHER_P7(EqualsSumOf, a, b, c, d, e, f, g, "") {
-  return arg == a + b + c + d + e + f + g;
-}
-MATCHER_P8(EqualsSumOf, a, b, c, d, e, f, g, h, "") {
-  return arg == a + b + c + d + e + f + g + h;
-}
-MATCHER_P9(EqualsSumOf, a, b, c, d, e, f, g, h, i, "") {
-  return arg == a + b + c + d + e + f + g + h + i;
-}
-MATCHER_P10(EqualsSumOf, a, b, c, d, e, f, g, h, i, j, "") {
-  return arg == a + b + c + d + e + f + g + h + i + j;
-}
-
-TEST(MatcherPnMacroTest, CanBeOverloadedOnNumberOfParameters) {
-  EXPECT_THAT(0, EqualsSumOf());
-  EXPECT_THAT(1, EqualsSumOf(1));
-  EXPECT_THAT(12, EqualsSumOf(10, 2));
-  EXPECT_THAT(123, EqualsSumOf(100, 20, 3));
-  EXPECT_THAT(1234, EqualsSumOf(1000, 200, 30, 4));
-  EXPECT_THAT(12345, EqualsSumOf(10000, 2000, 300, 40, 5));
-  EXPECT_THAT("abcdef",
-              EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e", 'f'));
-  EXPECT_THAT("abcdefg",
-              EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e", 'f', 'g'));
-  EXPECT_THAT("abcdefgh", EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e",
-                                      'f', 'g', "h"));
-  EXPECT_THAT("abcdefghi", EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e",
-                                       'f', 'g', "h", 'i'));
-  EXPECT_THAT("abcdefghij",
-              EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e", 'f', 'g', "h",
-                          'i', ::std::string("j")));
-
-  EXPECT_THAT(1, Not(EqualsSumOf()));
-  EXPECT_THAT(-1, Not(EqualsSumOf(1)));
-  EXPECT_THAT(-12, Not(EqualsSumOf(10, 2)));
-  EXPECT_THAT(-123, Not(EqualsSumOf(100, 20, 3)));
-  EXPECT_THAT(-1234, Not(EqualsSumOf(1000, 200, 30, 4)));
-  EXPECT_THAT(-12345, Not(EqualsSumOf(10000, 2000, 300, 40, 5)));
-  EXPECT_THAT("abcdef ",
-              Not(EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e", 'f')));
-  EXPECT_THAT("abcdefg ", Not(EqualsSumOf(::std::string("a"), 'b', 'c', "d",
-                                          "e", 'f', 'g')));
-  EXPECT_THAT("abcdefgh ", Not(EqualsSumOf(::std::string("a"), 'b', 'c', "d",
-                                           "e", 'f', 'g', "h")));
-  EXPECT_THAT("abcdefghi ", Not(EqualsSumOf(::std::string("a"), 'b', 'c', "d",
-                                            "e", 'f', 'g', "h", 'i')));
-  EXPECT_THAT("abcdefghij ",
-              Not(EqualsSumOf(::std::string("a"), 'b', 'c', "d", "e", 'f', 'g',
-                              "h", 'i', ::std::string("j"))));
-}
-
-// Tests that a MATCHER_Pn() definition can be instantiated with any
-// compatible parameter types.
-TEST(MatcherPnMacroTest, WorksForDifferentParameterTypes) {
-  EXPECT_THAT(123, EqualsSumOf(100L, 20, static_cast<char>(3)));
-  EXPECT_THAT("abcd", EqualsSumOf(::std::string("a"), "b", 'c', "d"));
-
-  EXPECT_THAT(124, Not(EqualsSumOf(100L, 20, static_cast<char>(3))));
-  EXPECT_THAT("abcde", Not(EqualsSumOf(::std::string("a"), "b", 'c', "d")));
-}
-
-// Tests that the matcher body can promote the parameter types.
-
-MATCHER_P2(EqConcat, prefix, suffix, "") {
-  // The following lines promote the two parameters to desired types.
-  std::string prefix_str(prefix);
-  char suffix_char = static_cast<char>(suffix);
-  return arg == prefix_str + suffix_char;
-}
-
-TEST(MatcherPnMacroTest, SimpleTypePromotion) {
-  Matcher<std::string> no_promo = EqConcat(std::string("foo"), 't');
-  Matcher<const std::string&> promo = EqConcat("foo", static_cast<int>('t'));
-  EXPECT_FALSE(no_promo.Matches("fool"));
-  EXPECT_FALSE(promo.Matches("fool"));
-  EXPECT_TRUE(no_promo.Matches("foot"));
-  EXPECT_TRUE(promo.Matches("foot"));
-}
-
-// Verifies the type of a MATCHER*.
-
-TEST(MatcherPnMacroTest, TypesAreCorrect) {
-  // EqualsSumOf() must be assignable to a EqualsSumOfMatcher variable.
-  EqualsSumOfMatcher a0 = EqualsSumOf();
-
-  // EqualsSumOf(1) must be assignable to a EqualsSumOfMatcherP variable.
-  EqualsSumOfMatcherP<int> a1 = EqualsSumOf(1);
-
-  // EqualsSumOf(p1, ..., pk) must be assignable to a EqualsSumOfMatcherPk
-  // variable, and so on.
-  EqualsSumOfMatcherP2<int, char> a2 = EqualsSumOf(1, '2');
-  EqualsSumOfMatcherP3<int, int, char> a3 = EqualsSumOf(1, 2, '3');
-  EqualsSumOfMatcherP4<int, int, int, char> a4 = EqualsSumOf(1, 2, 3, '4');
-  EqualsSumOfMatcherP5<int, int, int, int, char> a5 =
-      EqualsSumOf(1, 2, 3, 4, '5');
-  EqualsSumOfMatcherP6<int, int, int, int, int, char> a6 =
-      EqualsSumOf(1, 2, 3, 4, 5, '6');
-  EqualsSumOfMatcherP7<int, int, int, int, int, int, char> a7 =
-      EqualsSumOf(1, 2, 3, 4, 5, 6, '7');
-  EqualsSumOfMatcherP8<int, int, int, int, int, int, int, char> a8 =
-      EqualsSumOf(1, 2, 3, 4, 5, 6, 7, '8');
-  EqualsSumOfMatcherP9<int, int, int, int, int, int, int, int, char> a9 =
-      EqualsSumOf(1, 2, 3, 4, 5, 6, 7, 8, '9');
-  EqualsSumOfMatcherP10<int, int, int, int, int, int, int, int, int, char> a10 =
-      EqualsSumOf(1, 2, 3, 4, 5, 6, 7, 8, 9, '0');
-
-  // Avoid "unused variable" warnings.
-  (void)a0;
-  (void)a1;
-  (void)a2;
-  (void)a3;
-  (void)a4;
-  (void)a5;
-  (void)a6;
-  (void)a7;
-  (void)a8;
-  (void)a9;
-  (void)a10;
-}
-
-// Tests that matcher-typed parameters can be used in Value() inside a
-// MATCHER_Pn definition.
-
-// Succeeds if arg matches exactly 2 of the 3 matchers.
-MATCHER_P3(TwoOf, m1, m2, m3, "") {
-  const int count = static_cast<int>(Value(arg, m1)) +
-                    static_cast<int>(Value(arg, m2)) +
-                    static_cast<int>(Value(arg, m3));
-  return count == 2;
-}
-
-TEST(MatcherPnMacroTest, CanUseMatcherTypedParameterInValue) {
-  EXPECT_THAT(42, TwoOf(Gt(0), Lt(50), Eq(10)));
-  EXPECT_THAT(0, Not(TwoOf(Gt(-1), Lt(1), Eq(0))));
-}
-
-// Tests Contains().
-
-TEST(ContainsTest, ListMatchesWhenElementIsInContainer) {
-  list<int> some_list;
-  some_list.push_back(3);
-  some_list.push_back(1);
-  some_list.push_back(2);
-  EXPECT_THAT(some_list, Contains(1));
-  EXPECT_THAT(some_list, Contains(Gt(2.5)));
-  EXPECT_THAT(some_list, Contains(Eq(2.0f)));
-
-  list<std::string> another_list;
-  another_list.push_back("fee");
-  another_list.push_back("fie");
-  another_list.push_back("foe");
-  another_list.push_back("fum");
-  EXPECT_THAT(another_list, Contains(std::string("fee")));
-}
-
-TEST(ContainsTest, ListDoesNotMatchWhenElementIsNotInContainer) {
-  list<int> some_list;
-  some_list.push_back(3);
-  some_list.push_back(1);
-  EXPECT_THAT(some_list, Not(Contains(4)));
-}
-
-TEST(ContainsTest, SetMatchesWhenElementIsInContainer) {
-  set<int> some_set;
-  some_set.insert(3);
-  some_set.insert(1);
-  some_set.insert(2);
-  EXPECT_THAT(some_set, Contains(Eq(1.0)));
-  EXPECT_THAT(some_set, Contains(Eq(3.0f)));
-  EXPECT_THAT(some_set, Contains(2));
-
-  set<std::string> another_set;
-  another_set.insert("fee");
-  another_set.insert("fie");
-  another_set.insert("foe");
-  another_set.insert("fum");
-  EXPECT_THAT(another_set, Contains(Eq(std::string("fum"))));
-}
-
-TEST(ContainsTest, SetDoesNotMatchWhenElementIsNotInContainer) {
-  set<int> some_set;
-  some_set.insert(3);
-  some_set.insert(1);
-  EXPECT_THAT(some_set, Not(Contains(4)));
-
-  set<std::string> c_string_set;
-  c_string_set.insert("hello");
-  EXPECT_THAT(c_string_set, Not(Contains(std::string("goodbye"))));
-}
-
-TEST(ContainsTest, ExplainsMatchResultCorrectly) {
-  const int a[2] = {1, 2};
-  Matcher<const int(&)[2]> m = Contains(2);
-  EXPECT_EQ("whose element #1 matches", Explain(m, a));
-
-  m = Contains(3);
-  EXPECT_EQ("", Explain(m, a));
-
-  m = Contains(GreaterThan(0));
-  EXPECT_EQ("whose element #0 matches, which is 1 more than 0", Explain(m, a));
-
-  m = Contains(GreaterThan(10));
-  EXPECT_EQ("", Explain(m, a));
-}
-
-TEST(ContainsTest, DescribesItselfCorrectly) {
-  Matcher<vector<int>> m = Contains(1);
-  EXPECT_EQ("contains at least one element that is equal to 1", Describe(m));
-
-  Matcher<vector<int>> m2 = Not(m);
-  EXPECT_EQ("doesn't contain any element that is equal to 1", Describe(m2));
-}
-
-TEST(ContainsTest, MapMatchesWhenElementIsInContainer) {
-  map<std::string, int> my_map;
-  const char* bar = "a string";
-  my_map[bar] = 2;
-  EXPECT_THAT(my_map, Contains(pair<const char* const, int>(bar, 2)));
-
-  map<std::string, int> another_map;
-  another_map["fee"] = 1;
-  another_map["fie"] = 2;
-  another_map["foe"] = 3;
-  another_map["fum"] = 4;
-  EXPECT_THAT(another_map,
-              Contains(pair<const std::string, int>(std::string("fee"), 1)));
-  EXPECT_THAT(another_map, Contains(pair<const std::string, int>("fie", 2)));
-}
-
-TEST(ContainsTest, MapDoesNotMatchWhenElementIsNotInContainer) {
-  map<int, int> some_map;
-  some_map[1] = 11;
-  some_map[2] = 22;
-  EXPECT_THAT(some_map, Not(Contains(pair<const int, int>(2, 23))));
-}
-
-TEST(ContainsTest, ArrayMatchesWhenElementIsInContainer) {
-  const char* string_array[] = {"fee", "fie", "foe", "fum"};
-  EXPECT_THAT(string_array, Contains(Eq(std::string("fum"))));
-}
-
-TEST(ContainsTest, ArrayDoesNotMatchWhenElementIsNotInContainer) {
-  int int_array[] = {1, 2, 3, 4};
-  EXPECT_THAT(int_array, Not(Contains(5)));
-}
-
-TEST(ContainsTest, AcceptsMatcher) {
-  const int a[] = {1, 2, 3};
-  EXPECT_THAT(a, Contains(Gt(2)));
-  EXPECT_THAT(a, Not(Contains(Gt(4))));
-}
-
-TEST(ContainsTest, WorksForNativeArrayAsTuple) {
-  const int a[] = {1, 2};
-  const int* const pointer = a;
-  EXPECT_THAT(std::make_tuple(pointer, 2), Contains(1));
-  EXPECT_THAT(std::make_tuple(pointer, 2), Not(Contains(Gt(3))));
-}
-
-TEST(ContainsTest, WorksForTwoDimensionalNativeArray) {
-  int a[][3] = {{1, 2, 3}, {4, 5, 6}};
-  EXPECT_THAT(a, Contains(ElementsAre(4, 5, 6)));
-  EXPECT_THAT(a, Contains(Contains(5)));
-  EXPECT_THAT(a, Not(Contains(ElementsAre(3, 4, 5))));
-  EXPECT_THAT(a, Contains(Not(Contains(5))));
-}
-
-TEST(AllOfArrayTest, BasicForms) {
-  // Iterator
-  std::vector<int> v0{};
-  std::vector<int> v1{1};
-  std::vector<int> v2{2, 3};
-  std::vector<int> v3{4, 4, 4};
-  EXPECT_THAT(0, AllOfArray(v0.begin(), v0.end()));
-  EXPECT_THAT(1, AllOfArray(v1.begin(), v1.end()));
-  EXPECT_THAT(2, Not(AllOfArray(v1.begin(), v1.end())));
-  EXPECT_THAT(3, Not(AllOfArray(v2.begin(), v2.end())));
-  EXPECT_THAT(4, AllOfArray(v3.begin(), v3.end()));
-  // Pointer +  size
-  int ar[6] = {1, 2, 3, 4, 4, 4};
-  EXPECT_THAT(0, AllOfArray(ar, 0));
-  EXPECT_THAT(1, AllOfArray(ar, 1));
-  EXPECT_THAT(2, Not(AllOfArray(ar, 1)));
-  EXPECT_THAT(3, Not(AllOfArray(ar + 1, 3)));
-  EXPECT_THAT(4, AllOfArray(ar + 3, 3));
-  // Array
-  // int ar0[0];  Not usable
-  int ar1[1] = {1};
-  int ar2[2] = {2, 3};
-  int ar3[3] = {4, 4, 4};
-  // EXPECT_THAT(0, Not(AllOfArray(ar0)));  // Cannot work
-  EXPECT_THAT(1, AllOfArray(ar1));
-  EXPECT_THAT(2, Not(AllOfArray(ar1)));
-  EXPECT_THAT(3, Not(AllOfArray(ar2)));
-  EXPECT_THAT(4, AllOfArray(ar3));
-  // Container
-  EXPECT_THAT(0, AllOfArray(v0));
-  EXPECT_THAT(1, AllOfArray(v1));
-  EXPECT_THAT(2, Not(AllOfArray(v1)));
-  EXPECT_THAT(3, Not(AllOfArray(v2)));
-  EXPECT_THAT(4, AllOfArray(v3));
-  // Initializer
-  EXPECT_THAT(0, AllOfArray<int>({}));  // Requires template arg.
-  EXPECT_THAT(1, AllOfArray({1}));
-  EXPECT_THAT(2, Not(AllOfArray({1})));
-  EXPECT_THAT(3, Not(AllOfArray({2, 3})));
-  EXPECT_THAT(4, AllOfArray({4, 4, 4}));
-}
-
-TEST(AllOfArrayTest, Matchers) {
-  // vector
-  std::vector<Matcher<int>> matchers{Ge(1), Lt(2)};
-  EXPECT_THAT(0, Not(AllOfArray(matchers)));
-  EXPECT_THAT(1, AllOfArray(matchers));
-  EXPECT_THAT(2, Not(AllOfArray(matchers)));
-  // initializer_list
-  EXPECT_THAT(0, Not(AllOfArray({Ge(0), Ge(1)})));
-  EXPECT_THAT(1, AllOfArray({Ge(0), Ge(1)}));
-}
-
-TEST(AnyOfArrayTest, BasicForms) {
-  // Iterator
-  std::vector<int> v0{};
-  std::vector<int> v1{1};
-  std::vector<int> v2{2, 3};
-  EXPECT_THAT(0, Not(AnyOfArray(v0.begin(), v0.end())));
-  EXPECT_THAT(1, AnyOfArray(v1.begin(), v1.end()));
-  EXPECT_THAT(2, Not(AnyOfArray(v1.begin(), v1.end())));
-  EXPECT_THAT(3, AnyOfArray(v2.begin(), v2.end()));
-  EXPECT_THAT(4, Not(AnyOfArray(v2.begin(), v2.end())));
-  // Pointer +  size
-  int ar[3] = {1, 2, 3};
-  EXPECT_THAT(0, Not(AnyOfArray(ar, 0)));
-  EXPECT_THAT(1, AnyOfArray(ar, 1));
-  EXPECT_THAT(2, Not(AnyOfArray(ar, 1)));
-  EXPECT_THAT(3, AnyOfArray(ar + 1, 2));
-  EXPECT_THAT(4, Not(AnyOfArray(ar + 1, 2)));
-  // Array
-  // int ar0[0];  Not usable
-  int ar1[1] = {1};
-  int ar2[2] = {2, 3};
-  // EXPECT_THAT(0, Not(AnyOfArray(ar0)));  // Cannot work
-  EXPECT_THAT(1, AnyOfArray(ar1));
-  EXPECT_THAT(2, Not(AnyOfArray(ar1)));
-  EXPECT_THAT(3, AnyOfArray(ar2));
-  EXPECT_THAT(4, Not(AnyOfArray(ar2)));
-  // Container
-  EXPECT_THAT(0, Not(AnyOfArray(v0)));
-  EXPECT_THAT(1, AnyOfArray(v1));
-  EXPECT_THAT(2, Not(AnyOfArray(v1)));
-  EXPECT_THAT(3, AnyOfArray(v2));
-  EXPECT_THAT(4, Not(AnyOfArray(v2)));
-  // Initializer
-  EXPECT_THAT(0, Not(AnyOfArray<int>({})));  // Requires template arg.
-  EXPECT_THAT(1, AnyOfArray({1}));
-  EXPECT_THAT(2, Not(AnyOfArray({1})));
-  EXPECT_THAT(3, AnyOfArray({2, 3}));
-  EXPECT_THAT(4, Not(AnyOfArray({2, 3})));
-}
-
-TEST(AnyOfArrayTest, Matchers) {
-  // We negate test AllOfArrayTest.Matchers.
-  // vector
-  std::vector<Matcher<int>> matchers{Lt(1), Ge(2)};
-  EXPECT_THAT(0, AnyOfArray(matchers));
-  EXPECT_THAT(1, Not(AnyOfArray(matchers)));
-  EXPECT_THAT(2, AnyOfArray(matchers));
-  // initializer_list
-  EXPECT_THAT(0, AnyOfArray({Lt(0), Lt(1)}));
-  EXPECT_THAT(1, Not(AllOfArray({Lt(0), Lt(1)})));
-}
-
-TEST(AnyOfArrayTest, ExplainsMatchResultCorrectly) {
-  // AnyOfArray and AllOfArry use the same underlying template-template,
-  // thus it is sufficient to test one here.
-  const std::vector<int> v0{};
-  const std::vector<int> v1{1};
-  const std::vector<int> v2{2, 3};
-  const Matcher<int> m0 = AnyOfArray(v0);
-  const Matcher<int> m1 = AnyOfArray(v1);
-  const Matcher<int> m2 = AnyOfArray(v2);
-  EXPECT_EQ("", Explain(m0, 0));
-  EXPECT_EQ("", Explain(m1, 1));
-  EXPECT_EQ("", Explain(m1, 2));
-  EXPECT_EQ("", Explain(m2, 3));
-  EXPECT_EQ("", Explain(m2, 4));
-  EXPECT_EQ("()", Describe(m0));
-  EXPECT_EQ("(is equal to 1)", Describe(m1));
-  EXPECT_EQ("(is equal to 2) or (is equal to 3)", Describe(m2));
-  EXPECT_EQ("()", DescribeNegation(m0));
-  EXPECT_EQ("(isn't equal to 1)", DescribeNegation(m1));
-  EXPECT_EQ("(isn't equal to 2) and (isn't equal to 3)", DescribeNegation(m2));
-  // Explain with matchers
-  const Matcher<int> g1 = AnyOfArray({GreaterThan(1)});
-  const Matcher<int> g2 = AnyOfArray({GreaterThan(1), GreaterThan(2)});
-  // Explains the first positiv match and all prior negative matches...
-  EXPECT_EQ("which is 1 less than 1", Explain(g1, 0));
-  EXPECT_EQ("which is the same as 1", Explain(g1, 1));
-  EXPECT_EQ("which is 1 more than 1", Explain(g1, 2));
-  EXPECT_EQ("which is 1 less than 1, and which is 2 less than 2",
-            Explain(g2, 0));
-  EXPECT_EQ("which is the same as 1, and which is 1 less than 2",
-            Explain(g2, 1));
-  EXPECT_EQ("which is 1 more than 1",  // Only the first
-            Explain(g2, 2));
-}
-
-TEST(AllOfTest, HugeMatcher) {
-  // Verify that using AllOf with many arguments doesn't cause
-  // the compiler to exceed template instantiation depth limit.
-  EXPECT_THAT(0, testing::AllOf(_, _, _, _, _, _, _, _, _,
-                                testing::AllOf(_, _, _, _, _, _, _, _, _, _)));
-}
-
-TEST(AnyOfTest, HugeMatcher) {
-  // Verify that using AnyOf with many arguments doesn't cause
-  // the compiler to exceed template instantiation depth limit.
-  EXPECT_THAT(0, testing::AnyOf(_, _, _, _, _, _, _, _, _,
-                                testing::AnyOf(_, _, _, _, _, _, _, _, _, _)));
-}
-
-namespace adl_test {
-
-// Verifies that the implementation of ::testing::AllOf and ::testing::AnyOf
-// don't issue unqualified recursive calls.  If they do, the argument dependent
-// name lookup will cause AllOf/AnyOf in the 'adl_test' namespace to be found
-// as a candidate and the compilation will break due to an ambiguous overload.
-
-// The matcher must be in the same namespace as AllOf/AnyOf to make argument
-// dependent lookup find those.
-MATCHER(M, "") {
-  (void)arg;
-  return true;
-}
-
-template <typename T1, typename T2>
-bool AllOf(const T1& /*t1*/, const T2& /*t2*/) {
-  return true;
-}
-
-TEST(AllOfTest, DoesNotCallAllOfUnqualified) {
-  EXPECT_THAT(42,
-              testing::AllOf(M(), M(), M(), M(), M(), M(), M(), M(), M(), M()));
-}
-
-template <typename T1, typename T2>
-bool AnyOf(const T1&, const T2&) {
-  return true;
-}
-
-TEST(AnyOfTest, DoesNotCallAnyOfUnqualified) {
-  EXPECT_THAT(42,
-              testing::AnyOf(M(), M(), M(), M(), M(), M(), M(), M(), M(), M()));
-}
-
-}  // namespace adl_test
-
-TEST(AllOfTest, WorksOnMoveOnlyType) {
-  std::unique_ptr<int> p(new int(3));
-  EXPECT_THAT(p, AllOf(Pointee(Eq(3)), Pointee(Gt(0)), Pointee(Lt(5))));
-  EXPECT_THAT(p, Not(AllOf(Pointee(Eq(3)), Pointee(Gt(0)), Pointee(Lt(3)))));
-}
-
-TEST(AnyOfTest, WorksOnMoveOnlyType) {
-  std::unique_ptr<int> p(new int(3));
-  EXPECT_THAT(p, AnyOf(Pointee(Eq(5)), Pointee(Lt(0)), Pointee(Lt(5))));
-  EXPECT_THAT(p, Not(AnyOf(Pointee(Eq(5)), Pointee(Lt(0)), Pointee(Gt(5)))));
-}
-
-MATCHER(IsNotNull, "") { return arg != nullptr; }
-
-// Verifies that a matcher defined using MATCHER() can work on
-// move-only types.
-TEST(MatcherMacroTest, WorksOnMoveOnlyType) {
-  std::unique_ptr<int> p(new int(3));
-  EXPECT_THAT(p, IsNotNull());
-  EXPECT_THAT(std::unique_ptr<int>(), Not(IsNotNull()));
-}
-
-MATCHER_P(UniquePointee, pointee, "") { return *arg == pointee; }
-
-// Verifies that a matcher defined using MATCHER_P*() can work on
-// move-only types.
-TEST(MatcherPMacroTest, WorksOnMoveOnlyType) {
-  std::unique_ptr<int> p(new int(3));
-  EXPECT_THAT(p, UniquePointee(3));
-  EXPECT_THAT(p, Not(UniquePointee(2)));
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// std::function<void()> is used below for compatibility with older copies of
-// GCC. Normally, a raw lambda is all that is needed.
-
-// Test that examples from documentation compile
-TEST(ThrowsTest, Examples) {
-  EXPECT_THAT(
-      std::function<void()>([]() { throw std::runtime_error("message"); }),
-      Throws<std::runtime_error>());
-
-  EXPECT_THAT(
-      std::function<void()>([]() { throw std::runtime_error("message"); }),
-      ThrowsMessage<std::runtime_error>(HasSubstr("message")));
-}
-
-TEST(ThrowsTest, DoesNotGenerateDuplicateCatchClauseWarning) {
-  EXPECT_THAT(std::function<void()>([]() { throw std::exception(); }),
-              Throws<std::exception>());
-}
-
-TEST(ThrowsTest, CallableExecutedExactlyOnce) {
-  size_t a = 0;
-
-  EXPECT_THAT(std::function<void()>([&a]() {
-                a++;
-                throw 10;
-              }),
-              Throws<int>());
-  EXPECT_EQ(a, 1u);
-
-  EXPECT_THAT(std::function<void()>([&a]() {
-                a++;
-                throw std::runtime_error("message");
-              }),
-              Throws<std::runtime_error>());
-  EXPECT_EQ(a, 2u);
-
-  EXPECT_THAT(std::function<void()>([&a]() {
-                a++;
-                throw std::runtime_error("message");
-              }),
-              ThrowsMessage<std::runtime_error>(HasSubstr("message")));
-  EXPECT_EQ(a, 3u);
-
-  EXPECT_THAT(std::function<void()>([&a]() {
-                a++;
-                throw std::runtime_error("message");
-              }),
-              Throws<std::runtime_error>(
-                  Property(&std::runtime_error::what, HasSubstr("message"))));
-  EXPECT_EQ(a, 4u);
-}
-
-TEST(ThrowsTest, Describe) {
-  Matcher<std::function<void()>> matcher = Throws<std::runtime_error>();
-  std::stringstream ss;
-  matcher.DescribeTo(&ss);
-  auto explanation = ss.str();
-  EXPECT_THAT(explanation, HasSubstr("std::runtime_error"));
-}
-
-TEST(ThrowsTest, Success) {
-  Matcher<std::function<void()>> matcher = Throws<std::runtime_error>();
-  StringMatchResultListener listener;
-  EXPECT_TRUE(matcher.MatchAndExplain(
-      []() { throw std::runtime_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("std::runtime_error"));
-}
-
-TEST(ThrowsTest, FailWrongType) {
-  Matcher<std::function<void()>> matcher = Throws<std::runtime_error>();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain(
-      []() { throw std::logic_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("std::logic_error"));
-  EXPECT_THAT(listener.str(), HasSubstr("\"error message\""));
-}
-
-TEST(ThrowsTest, FailWrongTypeNonStd) {
-  Matcher<std::function<void()>> matcher = Throws<std::runtime_error>();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain([]() { throw 10; }, &listener));
-  EXPECT_THAT(listener.str(),
-              HasSubstr("throws an exception of an unknown type"));
-}
-
-TEST(ThrowsTest, FailNoThrow) {
-  Matcher<std::function<void()>> matcher = Throws<std::runtime_error>();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain([]() { (void)0; }, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("does not throw any exception"));
-}
-
-class ThrowsPredicateTest
-    : public TestWithParam<Matcher<std::function<void()>>> {};
-
-TEST_P(ThrowsPredicateTest, Describe) {
-  Matcher<std::function<void()>> matcher = GetParam();
-  std::stringstream ss;
-  matcher.DescribeTo(&ss);
-  auto explanation = ss.str();
-  EXPECT_THAT(explanation, HasSubstr("std::runtime_error"));
-  EXPECT_THAT(explanation, HasSubstr("error message"));
-}
-
-TEST_P(ThrowsPredicateTest, Success) {
-  Matcher<std::function<void()>> matcher = GetParam();
-  StringMatchResultListener listener;
-  EXPECT_TRUE(matcher.MatchAndExplain(
-      []() { throw std::runtime_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("std::runtime_error"));
-}
-
-TEST_P(ThrowsPredicateTest, FailWrongType) {
-  Matcher<std::function<void()>> matcher = GetParam();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain(
-      []() { throw std::logic_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("std::logic_error"));
-  EXPECT_THAT(listener.str(), HasSubstr("\"error message\""));
-}
-
-TEST_P(ThrowsPredicateTest, FailWrongTypeNonStd) {
-  Matcher<std::function<void()>> matcher = GetParam();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain([]() { throw 10; }, &listener));
-  EXPECT_THAT(listener.str(),
-              HasSubstr("throws an exception of an unknown type"));
-}
-
-TEST_P(ThrowsPredicateTest, FailWrongMessage) {
-  Matcher<std::function<void()>> matcher = GetParam();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain(
-      []() { throw std::runtime_error("wrong message"); }, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("std::runtime_error"));
-  EXPECT_THAT(listener.str(), Not(HasSubstr("wrong message")));
-}
-
-TEST_P(ThrowsPredicateTest, FailNoThrow) {
-  Matcher<std::function<void()>> matcher = GetParam();
-  StringMatchResultListener listener;
-  EXPECT_FALSE(matcher.MatchAndExplain([]() {}, &listener));
-  EXPECT_THAT(listener.str(), HasSubstr("does not throw any exception"));
-}
-
-INSTANTIATE_TEST_SUITE_P(
-    AllMessagePredicates, ThrowsPredicateTest,
-    Values(Matcher<std::function<void()>>(
-        ThrowsMessage<std::runtime_error>(HasSubstr("error message")))));
-
-// Tests that Throws<E1>(Matcher<E2>{}) compiles even when E2 != const E1&.
-TEST(ThrowsPredicateCompilesTest, ExceptionMatcherAcceptsBroadType) {
-  {
-    Matcher<std::function<void()>> matcher =
-        ThrowsMessage<std::runtime_error>(HasSubstr("error message"));
-    EXPECT_TRUE(
-        matcher.Matches([]() { throw std::runtime_error("error message"); }));
-    EXPECT_FALSE(
-        matcher.Matches([]() { throw std::runtime_error("wrong message"); }));
-  }
-
-  {
-    Matcher<uint64_t> inner = Eq(10);
-    Matcher<std::function<void()>> matcher = Throws<uint32_t>(inner);
-    EXPECT_TRUE(matcher.Matches([]() { throw(uint32_t) 10; }));
-    EXPECT_FALSE(matcher.Matches([]() { throw(uint32_t) 11; }));
-  }
-}
-
-// Tests that ThrowsMessage("message") is equivalent
-// to ThrowsMessage(Eq<std::string>("message")).
-TEST(ThrowsPredicateCompilesTest, MessageMatcherAcceptsNonMatcher) {
-  Matcher<std::function<void()>> matcher =
-      ThrowsMessage<std::runtime_error>("error message");
-  EXPECT_TRUE(
-      matcher.Matches([]() { throw std::runtime_error("error message"); }));
-  EXPECT_FALSE(matcher.Matches(
-      []() { throw std::runtime_error("wrong error message"); }));
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-}  // namespace
-}  // namespace gmock_matchers_test
-}  // namespace testing
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
diff --git a/third_party/googletest/googlemock/test/gmock-more-actions_test.cc b/third_party/googletest/googlemock/test/gmock-more-actions_test.cc
deleted file mode 100644
index 53bb029..0000000
--- a/third_party/googletest/googlemock/test/gmock-more-actions_test.cc
+++ /dev/null
@@ -1,1547 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the built-in actions in gmock-actions.h.
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4577)
-#endif
-
-#include "gmock/gmock-more-actions.h"
-
-#include <functional>
-#include <memory>
-#include <sstream>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace gmock_more_actions_test {
-
-using ::std::plus;
-using ::std::string;
-using testing::Action;
-using testing::DeleteArg;
-using testing::Invoke;
-using testing::ReturnArg;
-using testing::ReturnPointee;
-using testing::SaveArg;
-using testing::SaveArgPointee;
-using testing::SetArgReferee;
-using testing::Unused;
-using testing::WithArg;
-using testing::WithoutArgs;
-
-// For suppressing compiler warnings on conversion possibly losing precision.
-inline short Short(short n) { return n; }  // NOLINT
-inline char Char(char ch) { return ch; }
-
-// Sample functions and functors for testing Invoke() and etc.
-int Nullary() { return 1; }
-
-bool g_done = false;
-
-bool Unary(int x) { return x < 0; }
-
-bool ByConstRef(const std::string& s) { return s == "Hi"; }
-
-const double g_double = 0;
-bool ReferencesGlobalDouble(const double& x) { return &x == &g_double; }
-
-struct UnaryFunctor {
-  int operator()(bool x) { return x ? 1 : -1; }
-};
-
-const char* Binary(const char* input, short n) { return input + n; }  // NOLINT
-
-int Ternary(int x, char y, short z) { return x + y + z; }  // NOLINT
-
-int SumOf4(int a, int b, int c, int d) { return a + b + c + d; }
-
-int SumOfFirst2(int a, int b, Unused, Unused) { return a + b; }
-
-int SumOf5(int a, int b, int c, int d, int e) { return a + b + c + d + e; }
-
-struct SumOf5Functor {
-  int operator()(int a, int b, int c, int d, int e) {
-    return a + b + c + d + e;
-  }
-};
-
-int SumOf6(int a, int b, int c, int d, int e, int f) {
-  return a + b + c + d + e + f;
-}
-
-struct SumOf6Functor {
-  int operator()(int a, int b, int c, int d, int e, int f) {
-    return a + b + c + d + e + f;
-  }
-};
-
-std::string Concat7(const char* s1, const char* s2, const char* s3,
-                    const char* s4, const char* s5, const char* s6,
-                    const char* s7) {
-  return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7;
-}
-
-std::string Concat8(const char* s1, const char* s2, const char* s3,
-                    const char* s4, const char* s5, const char* s6,
-                    const char* s7, const char* s8) {
-  return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7 + s8;
-}
-
-std::string Concat9(const char* s1, const char* s2, const char* s3,
-                    const char* s4, const char* s5, const char* s6,
-                    const char* s7, const char* s8, const char* s9) {
-  return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9;
-}
-
-std::string Concat10(const char* s1, const char* s2, const char* s3,
-                     const char* s4, const char* s5, const char* s6,
-                     const char* s7, const char* s8, const char* s9,
-                     const char* s10) {
-  return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10;
-}
-
-class Foo {
- public:
-  Foo() : value_(123) {}
-
-  int Nullary() const { return value_; }
-
-  short Unary(long x) { return static_cast<short>(value_ + x); }  // NOLINT
-
-  std::string Binary(const std::string& str, char c) const { return str + c; }
-
-  int Ternary(int x, bool y, char z) { return value_ + x + y*z; }
-
-  int SumOf4(int a, int b, int c, int d) const {
-    return a + b + c + d + value_;
-  }
-
-  int SumOfLast2(Unused, Unused, int a, int b) const { return a + b; }
-
-  int SumOf5(int a, int b, int c, int d, int e) { return a + b + c + d + e; }
-
-  int SumOf6(int a, int b, int c, int d, int e, int f) {
-    return a + b + c + d + e + f;
-  }
-
-  std::string Concat7(const char* s1, const char* s2, const char* s3,
-                      const char* s4, const char* s5, const char* s6,
-                      const char* s7) {
-    return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7;
-  }
-
-  std::string Concat8(const char* s1, const char* s2, const char* s3,
-                      const char* s4, const char* s5, const char* s6,
-                      const char* s7, const char* s8) {
-    return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7 + s8;
-  }
-
-  std::string Concat9(const char* s1, const char* s2, const char* s3,
-                      const char* s4, const char* s5, const char* s6,
-                      const char* s7, const char* s8, const char* s9) {
-    return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9;
-  }
-
-  std::string Concat10(const char* s1, const char* s2, const char* s3,
-                       const char* s4, const char* s5, const char* s6,
-                       const char* s7, const char* s8, const char* s9,
-                       const char* s10) {
-    return std::string(s1) + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10;
-  }
-
- private:
-  int value_;
-};
-
-// Tests using Invoke() with a nullary function.
-TEST(InvokeTest, Nullary) {
-  Action<int()> a = Invoke(Nullary);  // NOLINT
-  EXPECT_EQ(1, a.Perform(std::make_tuple()));
-}
-
-// Tests using Invoke() with a unary function.
-TEST(InvokeTest, Unary) {
-  Action<bool(int)> a = Invoke(Unary);  // NOLINT
-  EXPECT_FALSE(a.Perform(std::make_tuple(1)));
-  EXPECT_TRUE(a.Perform(std::make_tuple(-1)));
-}
-
-// Tests using Invoke() with a binary function.
-TEST(InvokeTest, Binary) {
-  Action<const char*(const char*, short)> a = Invoke(Binary);  // NOLINT
-  const char* p = "Hello";
-  EXPECT_EQ(p + 2, a.Perform(std::make_tuple(p, Short(2))));
-}
-
-// Tests using Invoke() with a ternary function.
-TEST(InvokeTest, Ternary) {
-  Action<int(int, char, short)> a = Invoke(Ternary);  // NOLINT
-  EXPECT_EQ(6, a.Perform(std::make_tuple(1, '\2', Short(3))));
-}
-
-// Tests using Invoke() with a 4-argument function.
-TEST(InvokeTest, FunctionThatTakes4Arguments) {
-  Action<int(int, int, int, int)> a = Invoke(SumOf4);  // NOLINT
-  EXPECT_EQ(1234, a.Perform(std::make_tuple(1000, 200, 30, 4)));
-}
-
-// Tests using Invoke() with a 5-argument function.
-TEST(InvokeTest, FunctionThatTakes5Arguments) {
-  Action<int(int, int, int, int, int)> a = Invoke(SumOf5);  // NOLINT
-  EXPECT_EQ(12345, a.Perform(std::make_tuple(10000, 2000, 300, 40, 5)));
-}
-
-// Tests using Invoke() with a 6-argument function.
-TEST(InvokeTest, FunctionThatTakes6Arguments) {
-  Action<int(int, int, int, int, int, int)> a = Invoke(SumOf6);  // NOLINT
-  EXPECT_EQ(123456,
-            a.Perform(std::make_tuple(100000, 20000, 3000, 400, 50, 6)));
-}
-
-// A helper that turns the type of a C-string literal from const
-// char[N] to const char*.
-inline const char* CharPtr(const char* s) { return s; }
-
-// Tests using Invoke() with a 7-argument function.
-TEST(InvokeTest, FunctionThatTakes7Arguments) {
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*)>
-      a = Invoke(Concat7);
-  EXPECT_EQ("1234567",
-            a.Perform(std::make_tuple(CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                                      CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                                      CharPtr("7"))));
-}
-
-// Tests using Invoke() with a 8-argument function.
-TEST(InvokeTest, FunctionThatTakes8Arguments) {
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*, const char*)>
-      a = Invoke(Concat8);
-  EXPECT_EQ("12345678",
-            a.Perform(std::make_tuple(CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                                      CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                                      CharPtr("7"), CharPtr("8"))));
-}
-
-// Tests using Invoke() with a 9-argument function.
-TEST(InvokeTest, FunctionThatTakes9Arguments) {
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*, const char*,
-                     const char*)>
-      a = Invoke(Concat9);
-  EXPECT_EQ("123456789", a.Perform(std::make_tuple(
-                             CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                             CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                             CharPtr("7"), CharPtr("8"), CharPtr("9"))));
-}
-
-// Tests using Invoke() with a 10-argument function.
-TEST(InvokeTest, FunctionThatTakes10Arguments) {
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*, const char*,
-                     const char*, const char*)>
-      a = Invoke(Concat10);
-  EXPECT_EQ("1234567890",
-            a.Perform(std::make_tuple(CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                                      CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                                      CharPtr("7"), CharPtr("8"), CharPtr("9"),
-                                      CharPtr("0"))));
-}
-
-// Tests using Invoke() with functions with parameters declared as Unused.
-TEST(InvokeTest, FunctionWithUnusedParameters) {
-  Action<int(int, int, double, const std::string&)> a1 = Invoke(SumOfFirst2);
-  std::tuple<int, int, double, std::string> dummy =
-      std::make_tuple(10, 2, 5.6, std::string("hi"));
-  EXPECT_EQ(12, a1.Perform(dummy));
-
-  Action<int(int, int, bool, int*)> a2 =
-      Invoke(SumOfFirst2);
-  EXPECT_EQ(
-      23, a2.Perform(std::make_tuple(20, 3, true, static_cast<int*>(nullptr))));
-}
-
-// Tests using Invoke() with methods with parameters declared as Unused.
-TEST(InvokeTest, MethodWithUnusedParameters) {
-  Foo foo;
-  Action<int(std::string, bool, int, int)> a1 = Invoke(&foo, &Foo::SumOfLast2);
-  EXPECT_EQ(12, a1.Perform(std::make_tuple(CharPtr("hi"), true, 10, 2)));
-
-  Action<int(char, double, int, int)> a2 =
-      Invoke(&foo, &Foo::SumOfLast2);
-  EXPECT_EQ(23, a2.Perform(std::make_tuple('a', 2.5, 20, 3)));
-}
-
-// Tests using Invoke() with a functor.
-TEST(InvokeTest, Functor) {
-  Action<long(long, int)> a = Invoke(plus<long>());  // NOLINT
-  EXPECT_EQ(3L, a.Perform(std::make_tuple(1, 2)));
-}
-
-// Tests using Invoke(f) as an action of a compatible type.
-TEST(InvokeTest, FunctionWithCompatibleType) {
-  Action<long(int, short, char, bool)> a = Invoke(SumOf4);  // NOLINT
-  EXPECT_EQ(4321, a.Perform(std::make_tuple(4000, Short(300), Char(20), true)));
-}
-
-// Tests using Invoke() with an object pointer and a method pointer.
-
-// Tests using Invoke() with a nullary method.
-TEST(InvokeMethodTest, Nullary) {
-  Foo foo;
-  Action<int()> a = Invoke(&foo, &Foo::Nullary);  // NOLINT
-  EXPECT_EQ(123, a.Perform(std::make_tuple()));
-}
-
-// Tests using Invoke() with a unary method.
-TEST(InvokeMethodTest, Unary) {
-  Foo foo;
-  Action<short(long)> a = Invoke(&foo, &Foo::Unary);  // NOLINT
-  EXPECT_EQ(4123, a.Perform(std::make_tuple(4000)));
-}
-
-// Tests using Invoke() with a binary method.
-TEST(InvokeMethodTest, Binary) {
-  Foo foo;
-  Action<std::string(const std::string&, char)> a = Invoke(&foo, &Foo::Binary);
-  std::string s("Hell");
-  std::tuple<std::string, char> dummy = std::make_tuple(s, 'o');
-  EXPECT_EQ("Hello", a.Perform(dummy));
-}
-
-// Tests using Invoke() with a ternary method.
-TEST(InvokeMethodTest, Ternary) {
-  Foo foo;
-  Action<int(int, bool, char)> a = Invoke(&foo, &Foo::Ternary);  // NOLINT
-  EXPECT_EQ(1124, a.Perform(std::make_tuple(1000, true, Char(1))));
-}
-
-// Tests using Invoke() with a 4-argument method.
-TEST(InvokeMethodTest, MethodThatTakes4Arguments) {
-  Foo foo;
-  Action<int(int, int, int, int)> a = Invoke(&foo, &Foo::SumOf4);  // NOLINT
-  EXPECT_EQ(1357, a.Perform(std::make_tuple(1000, 200, 30, 4)));
-}
-
-// Tests using Invoke() with a 5-argument method.
-TEST(InvokeMethodTest, MethodThatTakes5Arguments) {
-  Foo foo;
-  Action<int(int, int, int, int, int)> a = Invoke(&foo, &Foo::SumOf5);  // NOLINT
-  EXPECT_EQ(12345, a.Perform(std::make_tuple(10000, 2000, 300, 40, 5)));
-}
-
-// Tests using Invoke() with a 6-argument method.
-TEST(InvokeMethodTest, MethodThatTakes6Arguments) {
-  Foo foo;
-  Action<int(int, int, int, int, int, int)> a =  // NOLINT
-      Invoke(&foo, &Foo::SumOf6);
-  EXPECT_EQ(123456,
-            a.Perform(std::make_tuple(100000, 20000, 3000, 400, 50, 6)));
-}
-
-// Tests using Invoke() with a 7-argument method.
-TEST(InvokeMethodTest, MethodThatTakes7Arguments) {
-  Foo foo;
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*)>
-      a = Invoke(&foo, &Foo::Concat7);
-  EXPECT_EQ("1234567",
-            a.Perform(std::make_tuple(CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                                      CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                                      CharPtr("7"))));
-}
-
-// Tests using Invoke() with a 8-argument method.
-TEST(InvokeMethodTest, MethodThatTakes8Arguments) {
-  Foo foo;
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*, const char*)>
-      a = Invoke(&foo, &Foo::Concat8);
-  EXPECT_EQ("12345678",
-            a.Perform(std::make_tuple(CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                                      CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                                      CharPtr("7"), CharPtr("8"))));
-}
-
-// Tests using Invoke() with a 9-argument method.
-TEST(InvokeMethodTest, MethodThatTakes9Arguments) {
-  Foo foo;
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*, const char*,
-                     const char*)>
-      a = Invoke(&foo, &Foo::Concat9);
-  EXPECT_EQ("123456789", a.Perform(std::make_tuple(
-                             CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                             CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                             CharPtr("7"), CharPtr("8"), CharPtr("9"))));
-}
-
-// Tests using Invoke() with a 10-argument method.
-TEST(InvokeMethodTest, MethodThatTakes10Arguments) {
-  Foo foo;
-  Action<std::string(const char*, const char*, const char*, const char*,
-                     const char*, const char*, const char*, const char*,
-                     const char*, const char*)>
-      a = Invoke(&foo, &Foo::Concat10);
-  EXPECT_EQ("1234567890",
-            a.Perform(std::make_tuple(CharPtr("1"), CharPtr("2"), CharPtr("3"),
-                                      CharPtr("4"), CharPtr("5"), CharPtr("6"),
-                                      CharPtr("7"), CharPtr("8"), CharPtr("9"),
-                                      CharPtr("0"))));
-}
-
-// Tests using Invoke(f) as an action of a compatible type.
-TEST(InvokeMethodTest, MethodWithCompatibleType) {
-  Foo foo;
-  Action<long(int, short, char, bool)> a =  // NOLINT
-      Invoke(&foo, &Foo::SumOf4);
-  EXPECT_EQ(4444, a.Perform(std::make_tuple(4000, Short(300), Char(20), true)));
-}
-
-// Tests using WithoutArgs with an action that takes no argument.
-TEST(WithoutArgsTest, NoArg) {
-  Action<int(int n)> a = WithoutArgs(Invoke(Nullary));  // NOLINT
-  EXPECT_EQ(1, a.Perform(std::make_tuple(2)));
-}
-
-// Tests using WithArg with an action that takes 1 argument.
-TEST(WithArgTest, OneArg) {
-  Action<bool(double x, int n)> b = WithArg<1>(Invoke(Unary));  // NOLINT
-  EXPECT_TRUE(b.Perform(std::make_tuple(1.5, -1)));
-  EXPECT_FALSE(b.Perform(std::make_tuple(1.5, 1)));
-}
-
-TEST(ReturnArgActionTest, WorksForOneArgIntArg0) {
-  const Action<int(int)> a = ReturnArg<0>();
-  EXPECT_EQ(5, a.Perform(std::make_tuple(5)));
-}
-
-TEST(ReturnArgActionTest, WorksForMultiArgBoolArg0) {
-  const Action<bool(bool, bool, bool)> a = ReturnArg<0>();
-  EXPECT_TRUE(a.Perform(std::make_tuple(true, false, false)));
-}
-
-TEST(ReturnArgActionTest, WorksForMultiArgStringArg2) {
-  const Action<std::string(int, int, std::string, int)> a = ReturnArg<2>();
-  EXPECT_EQ("seven", a.Perform(std::make_tuple(5, 6, std::string("seven"), 8)));
-}
-
-TEST(SaveArgActionTest, WorksForSameType) {
-  int result = 0;
-  const Action<void(int n)> a1 = SaveArg<0>(&result);
-  a1.Perform(std::make_tuple(5));
-  EXPECT_EQ(5, result);
-}
-
-TEST(SaveArgActionTest, WorksForCompatibleType) {
-  int result = 0;
-  const Action<void(bool, char)> a1 = SaveArg<1>(&result);
-  a1.Perform(std::make_tuple(true, 'a'));
-  EXPECT_EQ('a', result);
-}
-
-TEST(SaveArgPointeeActionTest, WorksForSameType) {
-  int result = 0;
-  const int value = 5;
-  const Action<void(const int*)> a1 = SaveArgPointee<0>(&result);
-  a1.Perform(std::make_tuple(&value));
-  EXPECT_EQ(5, result);
-}
-
-TEST(SaveArgPointeeActionTest, WorksForCompatibleType) {
-  int result = 0;
-  char value = 'a';
-  const Action<void(bool, char*)> a1 = SaveArgPointee<1>(&result);
-  a1.Perform(std::make_tuple(true, &value));
-  EXPECT_EQ('a', result);
-}
-
-TEST(SetArgRefereeActionTest, WorksForSameType) {
-  int value = 0;
-  const Action<void(int&)> a1 = SetArgReferee<0>(1);
-  a1.Perform(std::tuple<int&>(value));
-  EXPECT_EQ(1, value);
-}
-
-TEST(SetArgRefereeActionTest, WorksForCompatibleType) {
-  int value = 0;
-  const Action<void(int, int&)> a1 = SetArgReferee<1>('a');
-  a1.Perform(std::tuple<int, int&>(0, value));
-  EXPECT_EQ('a', value);
-}
-
-TEST(SetArgRefereeActionTest, WorksWithExtraArguments) {
-  int value = 0;
-  const Action<void(bool, int, int&, const char*)> a1 = SetArgReferee<2>('a');
-  a1.Perform(std::tuple<bool, int, int&, const char*>(true, 0, value, "hi"));
-  EXPECT_EQ('a', value);
-}
-
-// A class that can be used to verify that its destructor is called: it will set
-// the bool provided to the constructor to true when destroyed.
-class DeletionTester {
- public:
-  explicit DeletionTester(bool* is_deleted)
-    : is_deleted_(is_deleted) {
-    // Make sure the bit is set to false.
-    *is_deleted_ = false;
-  }
-
-  ~DeletionTester() {
-    *is_deleted_ = true;
-  }
-
- private:
-  bool* is_deleted_;
-};
-
-TEST(DeleteArgActionTest, OneArg) {
-  bool is_deleted = false;
-  DeletionTester* t = new DeletionTester(&is_deleted);
-  const Action<void(DeletionTester*)> a1 = DeleteArg<0>();      // NOLINT
-  EXPECT_FALSE(is_deleted);
-  a1.Perform(std::make_tuple(t));
-  EXPECT_TRUE(is_deleted);
-}
-
-TEST(DeleteArgActionTest, TenArgs) {
-  bool is_deleted = false;
-  DeletionTester* t = new DeletionTester(&is_deleted);
-  const Action<void(bool, int, int, const char*, bool,
-                    int, int, int, int, DeletionTester*)> a1 = DeleteArg<9>();
-  EXPECT_FALSE(is_deleted);
-  a1.Perform(std::make_tuple(true, 5, 6, CharPtr("hi"), false, 7, 8, 9, 10, t));
-  EXPECT_TRUE(is_deleted);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-TEST(ThrowActionTest, ThrowsGivenExceptionInVoidFunction) {
-  const Action<void(int n)> a = Throw('a');
-  EXPECT_THROW(a.Perform(std::make_tuple(0)), char);
-}
-
-class MyException {};
-
-TEST(ThrowActionTest, ThrowsGivenExceptionInNonVoidFunction) {
-  const Action<double(char ch)> a = Throw(MyException());
-  EXPECT_THROW(a.Perform(std::make_tuple('0')), MyException);
-}
-
-TEST(ThrowActionTest, ThrowsGivenExceptionInNullaryFunction) {
-  const Action<double()> a = Throw(MyException());
-  EXPECT_THROW(a.Perform(std::make_tuple()), MyException);
-}
-
-class Object {
- public:
-  virtual ~Object() {}
-  virtual void Func() {}
-};
-
-class MockObject : public Object {
- public:
-  ~MockObject() override {}
-  MOCK_METHOD(void, Func, (), (override));
-};
-
-TEST(ThrowActionTest, Times0) {
-  EXPECT_NONFATAL_FAILURE(
-      [] {
-        try {
-          MockObject m;
-          ON_CALL(m, Func()).WillByDefault([] { throw "something"; });
-          EXPECT_CALL(m, Func()).Times(0);
-          m.Func();
-        } catch (...) {
-          // Exception is caught but Times(0) still triggers a failure.
-        }
-      }(),
-      "");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that SetArrayArgument<N>(first, last) sets the elements of the array
-// pointed to by the N-th (0-based) argument to values in range [first, last).
-TEST(SetArrayArgumentTest, SetsTheNthArray) {
-  using MyFunction = void(bool, int*, char*);
-  int numbers[] = { 1, 2, 3 };
-  Action<MyFunction> a = SetArrayArgument<1>(numbers, numbers + 3);
-
-  int n[4] = {};
-  int* pn = n;
-  char ch[4] = {};
-  char* pch = ch;
-  a.Perform(std::make_tuple(true, pn, pch));
-  EXPECT_EQ(1, n[0]);
-  EXPECT_EQ(2, n[1]);
-  EXPECT_EQ(3, n[2]);
-  EXPECT_EQ(0, n[3]);
-  EXPECT_EQ('\0', ch[0]);
-  EXPECT_EQ('\0', ch[1]);
-  EXPECT_EQ('\0', ch[2]);
-  EXPECT_EQ('\0', ch[3]);
-
-  // Tests first and last are iterators.
-  std::string letters = "abc";
-  a = SetArrayArgument<2>(letters.begin(), letters.end());
-  std::fill_n(n, 4, 0);
-  std::fill_n(ch, 4, '\0');
-  a.Perform(std::make_tuple(true, pn, pch));
-  EXPECT_EQ(0, n[0]);
-  EXPECT_EQ(0, n[1]);
-  EXPECT_EQ(0, n[2]);
-  EXPECT_EQ(0, n[3]);
-  EXPECT_EQ('a', ch[0]);
-  EXPECT_EQ('b', ch[1]);
-  EXPECT_EQ('c', ch[2]);
-  EXPECT_EQ('\0', ch[3]);
-}
-
-// Tests SetArrayArgument<N>(first, last) where first == last.
-TEST(SetArrayArgumentTest, SetsTheNthArrayWithEmptyRange) {
-  using MyFunction = void(bool, int*);
-  int numbers[] = { 1, 2, 3 };
-  Action<MyFunction> a = SetArrayArgument<1>(numbers, numbers);
-
-  int n[4] = {};
-  int* pn = n;
-  a.Perform(std::make_tuple(true, pn));
-  EXPECT_EQ(0, n[0]);
-  EXPECT_EQ(0, n[1]);
-  EXPECT_EQ(0, n[2]);
-  EXPECT_EQ(0, n[3]);
-}
-
-// Tests SetArrayArgument<N>(first, last) where *first is convertible
-// (but not equal) to the argument type.
-TEST(SetArrayArgumentTest, SetsTheNthArrayWithConvertibleType) {
-  using MyFunction = void(bool, int*);
-  char chars[] = { 97, 98, 99 };
-  Action<MyFunction> a = SetArrayArgument<1>(chars, chars + 3);
-
-  int codes[4] = { 111, 222, 333, 444 };
-  int* pcodes = codes;
-  a.Perform(std::make_tuple(true, pcodes));
-  EXPECT_EQ(97, codes[0]);
-  EXPECT_EQ(98, codes[1]);
-  EXPECT_EQ(99, codes[2]);
-  EXPECT_EQ(444, codes[3]);
-}
-
-// Test SetArrayArgument<N>(first, last) with iterator as argument.
-TEST(SetArrayArgumentTest, SetsTheNthArrayWithIteratorArgument) {
-  using MyFunction = void(bool, std::back_insert_iterator<std::string>);
-  std::string letters = "abc";
-  Action<MyFunction> a = SetArrayArgument<1>(letters.begin(), letters.end());
-
-  std::string s;
-  a.Perform(std::make_tuple(true, back_inserter(s)));
-  EXPECT_EQ(letters, s);
-}
-
-TEST(ReturnPointeeTest, Works) {
-  int n = 42;
-  const Action<int()> a = ReturnPointee(&n);
-  EXPECT_EQ(42, a.Perform(std::make_tuple()));
-
-  n = 43;
-  EXPECT_EQ(43, a.Perform(std::make_tuple()));
-}
-
-// Tests InvokeArgument<N>(...).
-
-// Tests using InvokeArgument with a nullary function.
-TEST(InvokeArgumentTest, Function0) {
-  Action<int(int, int (*)())> a = InvokeArgument<1>();  // NOLINT
-  EXPECT_EQ(1, a.Perform(std::make_tuple(2, &Nullary)));
-}
-
-// Tests using InvokeArgument with a unary function.
-TEST(InvokeArgumentTest, Functor1) {
-  Action<int(UnaryFunctor)> a = InvokeArgument<0>(true);  // NOLINT
-  EXPECT_EQ(1, a.Perform(std::make_tuple(UnaryFunctor())));
-}
-
-// Tests using InvokeArgument with a 5-ary function.
-TEST(InvokeArgumentTest, Function5) {
-  Action<int(int (*)(int, int, int, int, int))> a =  // NOLINT
-      InvokeArgument<0>(10000, 2000, 300, 40, 5);
-  EXPECT_EQ(12345, a.Perform(std::make_tuple(&SumOf5)));
-}
-
-// Tests using InvokeArgument with a 5-ary functor.
-TEST(InvokeArgumentTest, Functor5) {
-  Action<int(SumOf5Functor)> a =  // NOLINT
-      InvokeArgument<0>(10000, 2000, 300, 40, 5);
-  EXPECT_EQ(12345, a.Perform(std::make_tuple(SumOf5Functor())));
-}
-
-// Tests using InvokeArgument with a 6-ary function.
-TEST(InvokeArgumentTest, Function6) {
-  Action<int(int (*)(int, int, int, int, int, int))> a =  // NOLINT
-      InvokeArgument<0>(100000, 20000, 3000, 400, 50, 6);
-  EXPECT_EQ(123456, a.Perform(std::make_tuple(&SumOf6)));
-}
-
-// Tests using InvokeArgument with a 6-ary functor.
-TEST(InvokeArgumentTest, Functor6) {
-  Action<int(SumOf6Functor)> a =  // NOLINT
-      InvokeArgument<0>(100000, 20000, 3000, 400, 50, 6);
-  EXPECT_EQ(123456, a.Perform(std::make_tuple(SumOf6Functor())));
-}
-
-// Tests using InvokeArgument with a 7-ary function.
-TEST(InvokeArgumentTest, Function7) {
-  Action<std::string(std::string(*)(const char*, const char*, const char*,
-                                    const char*, const char*, const char*,
-                                    const char*))>
-      a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7");
-  EXPECT_EQ("1234567", a.Perform(std::make_tuple(&Concat7)));
-}
-
-// Tests using InvokeArgument with a 8-ary function.
-TEST(InvokeArgumentTest, Function8) {
-  Action<std::string(std::string(*)(const char*, const char*, const char*,
-                                    const char*, const char*, const char*,
-                                    const char*, const char*))>
-      a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7", "8");
-  EXPECT_EQ("12345678", a.Perform(std::make_tuple(&Concat8)));
-}
-
-// Tests using InvokeArgument with a 9-ary function.
-TEST(InvokeArgumentTest, Function9) {
-  Action<std::string(std::string(*)(const char*, const char*, const char*,
-                                    const char*, const char*, const char*,
-                                    const char*, const char*, const char*))>
-      a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7", "8", "9");
-  EXPECT_EQ("123456789", a.Perform(std::make_tuple(&Concat9)));
-}
-
-// Tests using InvokeArgument with a 10-ary function.
-TEST(InvokeArgumentTest, Function10) {
-  Action<std::string(std::string(*)(
-      const char*, const char*, const char*, const char*, const char*,
-      const char*, const char*, const char*, const char*, const char*))>
-      a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7", "8", "9", "0");
-  EXPECT_EQ("1234567890", a.Perform(std::make_tuple(&Concat10)));
-}
-
-// Tests using InvokeArgument with a function that takes a pointer argument.
-TEST(InvokeArgumentTest, ByPointerFunction) {
-  Action<const char*(const char* (*)(const char* input, short n))>  // NOLINT
-      a = InvokeArgument<0>(static_cast<const char*>("Hi"), Short(1));
-  EXPECT_STREQ("i", a.Perform(std::make_tuple(&Binary)));
-}
-
-// Tests using InvokeArgument with a function that takes a const char*
-// by passing it a C-string literal.
-TEST(InvokeArgumentTest, FunctionWithCStringLiteral) {
-  Action<const char*(const char* (*)(const char* input, short n))>  // NOLINT
-      a = InvokeArgument<0>("Hi", Short(1));
-  EXPECT_STREQ("i", a.Perform(std::make_tuple(&Binary)));
-}
-
-// Tests using InvokeArgument with a function that takes a const reference.
-TEST(InvokeArgumentTest, ByConstReferenceFunction) {
-  Action<bool(bool (*function)(const std::string& s))> a =  // NOLINT
-      InvokeArgument<0>(std::string("Hi"));
-  // When action 'a' is constructed, it makes a copy of the temporary
-  // string object passed to it, so it's OK to use 'a' later, when the
-  // temporary object has already died.
-  EXPECT_TRUE(a.Perform(std::make_tuple(&ByConstRef)));
-}
-
-// Tests using InvokeArgument with ByRef() and a function that takes a
-// const reference.
-TEST(InvokeArgumentTest, ByExplicitConstReferenceFunction) {
-  Action<bool(bool (*)(const double& x))> a =  // NOLINT
-      InvokeArgument<0>(ByRef(g_double));
-  // The above line calls ByRef() on a const value.
-  EXPECT_TRUE(a.Perform(std::make_tuple(&ReferencesGlobalDouble)));
-
-  double x = 0;
-  a = InvokeArgument<0>(ByRef(x));  // This calls ByRef() on a non-const.
-  EXPECT_FALSE(a.Perform(std::make_tuple(&ReferencesGlobalDouble)));
-}
-
-// Tests DoAll(a1, a2).
-TEST(DoAllTest, TwoActions) {
-  int n = 0;
-  Action<int(int*)> a = DoAll(SetArgPointee<0>(1),  // NOLINT
-                              Return(2));
-  EXPECT_EQ(2, a.Perform(std::make_tuple(&n)));
-  EXPECT_EQ(1, n);
-}
-
-// Tests DoAll(a1, a2, a3).
-TEST(DoAllTest, ThreeActions) {
-  int m = 0, n = 0;
-  Action<int(int*, int*)> a = DoAll(SetArgPointee<0>(1),  // NOLINT
-                                    SetArgPointee<1>(2), Return(3));
-  EXPECT_EQ(3, a.Perform(std::make_tuple(&m, &n)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-}
-
-// Tests DoAll(a1, a2, a3, a4).
-TEST(DoAllTest, FourActions) {
-  int m = 0, n = 0;
-  char ch = '\0';
-  Action<int(int*, int*, char*)> a =  // NOLINT
-      DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2), SetArgPointee<2>('a'),
-            Return(3));
-  EXPECT_EQ(3, a.Perform(std::make_tuple(&m, &n, &ch)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', ch);
-}
-
-// Tests DoAll(a1, a2, a3, a4, a5).
-TEST(DoAllTest, FiveActions) {
-  int m = 0, n = 0;
-  char a = '\0', b = '\0';
-  Action<int(int*, int*, char*, char*)> action =  // NOLINT
-      DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2), SetArgPointee<2>('a'),
-            SetArgPointee<3>('b'), Return(3));
-  EXPECT_EQ(3, action.Perform(std::make_tuple(&m, &n, &a, &b)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', a);
-  EXPECT_EQ('b', b);
-}
-
-// Tests DoAll(a1, a2, ..., a6).
-TEST(DoAllTest, SixActions) {
-  int m = 0, n = 0;
-  char a = '\0', b = '\0', c = '\0';
-  Action<int(int*, int*, char*, char*, char*)> action =  // NOLINT
-      DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2), SetArgPointee<2>('a'),
-            SetArgPointee<3>('b'), SetArgPointee<4>('c'), Return(3));
-  EXPECT_EQ(3, action.Perform(std::make_tuple(&m, &n, &a, &b, &c)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', a);
-  EXPECT_EQ('b', b);
-  EXPECT_EQ('c', c);
-}
-
-// Tests DoAll(a1, a2, ..., a7).
-TEST(DoAllTest, SevenActions) {
-  int m = 0, n = 0;
-  char a = '\0', b = '\0', c = '\0', d = '\0';
-  Action<int(int*, int*, char*, char*, char*, char*)> action =  // NOLINT
-      DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2), SetArgPointee<2>('a'),
-            SetArgPointee<3>('b'), SetArgPointee<4>('c'), SetArgPointee<5>('d'),
-            Return(3));
-  EXPECT_EQ(3, action.Perform(std::make_tuple(&m, &n, &a, &b, &c, &d)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', a);
-  EXPECT_EQ('b', b);
-  EXPECT_EQ('c', c);
-  EXPECT_EQ('d', d);
-}
-
-// Tests DoAll(a1, a2, ..., a8).
-TEST(DoAllTest, EightActions) {
-  int m = 0, n = 0;
-  char a = '\0', b = '\0', c = '\0', d = '\0', e = '\0';
-  Action<int(int*, int*, char*, char*, char*, char*,  // NOLINT
-             char*)>
-      action =
-          DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2), SetArgPointee<2>('a'),
-                SetArgPointee<3>('b'), SetArgPointee<4>('c'),
-                SetArgPointee<5>('d'), SetArgPointee<6>('e'), Return(3));
-  EXPECT_EQ(3, action.Perform(std::make_tuple(&m, &n, &a, &b, &c, &d, &e)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', a);
-  EXPECT_EQ('b', b);
-  EXPECT_EQ('c', c);
-  EXPECT_EQ('d', d);
-  EXPECT_EQ('e', e);
-}
-
-// Tests DoAll(a1, a2, ..., a9).
-TEST(DoAllTest, NineActions) {
-  int m = 0, n = 0;
-  char a = '\0', b = '\0', c = '\0', d = '\0', e = '\0', f = '\0';
-  Action<int(int*, int*, char*, char*, char*, char*,  // NOLINT
-             char*, char*)>
-      action = DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2),
-                     SetArgPointee<2>('a'), SetArgPointee<3>('b'),
-                     SetArgPointee<4>('c'), SetArgPointee<5>('d'),
-                     SetArgPointee<6>('e'), SetArgPointee<7>('f'), Return(3));
-  EXPECT_EQ(3, action.Perform(std::make_tuple(&m, &n, &a, &b, &c, &d, &e, &f)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', a);
-  EXPECT_EQ('b', b);
-  EXPECT_EQ('c', c);
-  EXPECT_EQ('d', d);
-  EXPECT_EQ('e', e);
-  EXPECT_EQ('f', f);
-}
-
-// Tests DoAll(a1, a2, ..., a10).
-TEST(DoAllTest, TenActions) {
-  int m = 0, n = 0;
-  char a = '\0', b = '\0', c = '\0', d = '\0';
-  char e = '\0', f = '\0', g = '\0';
-  Action<int(int*, int*, char*, char*, char*, char*,  // NOLINT
-             char*, char*, char*)>
-      action =
-          DoAll(SetArgPointee<0>(1), SetArgPointee<1>(2), SetArgPointee<2>('a'),
-                SetArgPointee<3>('b'), SetArgPointee<4>('c'),
-                SetArgPointee<5>('d'), SetArgPointee<6>('e'),
-                SetArgPointee<7>('f'), SetArgPointee<8>('g'), Return(3));
-  EXPECT_EQ(
-      3, action.Perform(std::make_tuple(&m, &n, &a, &b, &c, &d, &e, &f, &g)));
-  EXPECT_EQ(1, m);
-  EXPECT_EQ(2, n);
-  EXPECT_EQ('a', a);
-  EXPECT_EQ('b', b);
-  EXPECT_EQ('c', c);
-  EXPECT_EQ('d', d);
-  EXPECT_EQ('e', e);
-  EXPECT_EQ('f', f);
-  EXPECT_EQ('g', g);
-}
-
-TEST(DoAllTest, NoArgs) {
-  bool ran_first = false;
-  Action<bool()> a =
-      DoAll([&] { ran_first = true; }, [&] { return ran_first; });
-  EXPECT_TRUE(a.Perform({}));
-}
-
-TEST(DoAllTest, MoveOnlyArgs) {
-  bool ran_first = false;
-  Action<int(std::unique_ptr<int>)> a =
-      DoAll(InvokeWithoutArgs([&] { ran_first = true; }),
-            [](std::unique_ptr<int> p) { return *p; });
-  EXPECT_EQ(7, a.Perform(std::make_tuple(std::unique_ptr<int>(new int(7)))));
-  EXPECT_TRUE(ran_first);
-}
-
-TEST(DoAllTest, ImplicitlyConvertsActionArguments) {
-  bool ran_first = false;
-  // Action<void(std::vector<int>)> isn't an
-  // Action<void(const std::vector<int>&) but can be converted.
-  Action<void(std::vector<int>)> first = [&] { ran_first = true; };
-  Action<int(std::vector<int>)> a =
-      DoAll(first, [](std::vector<int> arg) { return arg.front(); });
-  EXPECT_EQ(7, a.Perform(std::make_tuple(std::vector<int>{7})));
-  EXPECT_TRUE(ran_first);
-}
-
-// The ACTION*() macros trigger warning C4100 (unreferenced formal
-// parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
-// the macro definition, as the warnings are generated when the macro
-// is expanded and macro expansion cannot contain #pragma.  Therefore
-// we suppress them here.
-// Also suppress C4503 decorated name length exceeded, name was truncated
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4100)
-#pragma warning(disable : 4503)
-#endif
-// Tests the ACTION*() macro family.
-
-// Tests that ACTION() can define an action that doesn't reference the
-// mock function arguments.
-ACTION(Return5) { return 5; }
-
-TEST(ActionMacroTest, WorksWhenNotReferencingArguments) {
-  Action<double()> a1 = Return5();
-  EXPECT_DOUBLE_EQ(5, a1.Perform(std::make_tuple()));
-
-  Action<int(double, bool)> a2 = Return5();
-  EXPECT_EQ(5, a2.Perform(std::make_tuple(1, true)));
-}
-
-// Tests that ACTION() can define an action that returns void.
-ACTION(IncrementArg1) { (*arg1)++; }
-
-TEST(ActionMacroTest, WorksWhenReturningVoid) {
-  Action<void(int, int*)> a1 = IncrementArg1();
-  int n = 0;
-  a1.Perform(std::make_tuple(5, &n));
-  EXPECT_EQ(1, n);
-}
-
-// Tests that the body of ACTION() can reference the type of the
-// argument.
-ACTION(IncrementArg2) {
-  StaticAssertTypeEq<int*, arg2_type>();
-  arg2_type temp = arg2;
-  (*temp)++;
-}
-
-TEST(ActionMacroTest, CanReferenceArgumentType) {
-  Action<void(int, bool, int*)> a1 = IncrementArg2();
-  int n = 0;
-  a1.Perform(std::make_tuple(5, false, &n));
-  EXPECT_EQ(1, n);
-}
-
-// Tests that the body of ACTION() can reference the argument tuple
-// via args_type and args.
-ACTION(Sum2) {
-  StaticAssertTypeEq<std::tuple<int, char, int*>, args_type>();
-  args_type args_copy = args;
-  return std::get<0>(args_copy) + std::get<1>(args_copy);
-}
-
-TEST(ActionMacroTest, CanReferenceArgumentTuple) {
-  Action<int(int, char, int*)> a1 = Sum2();
-  int dummy = 0;
-  EXPECT_EQ(11, a1.Perform(std::make_tuple(5, Char(6), &dummy)));
-}
-
-namespace {
-
-// Tests that the body of ACTION() can reference the mock function
-// type.
-int Dummy(bool flag) { return flag ? 1 : 0; }
-
-}  // namespace
-
-ACTION(InvokeDummy) {
-  StaticAssertTypeEq<int(bool), function_type>();
-  function_type* fp = &Dummy;
-  return (*fp)(true);
-}
-
-TEST(ActionMacroTest, CanReferenceMockFunctionType) {
-  Action<int(bool)> a1 = InvokeDummy();
-  EXPECT_EQ(1, a1.Perform(std::make_tuple(true)));
-  EXPECT_EQ(1, a1.Perform(std::make_tuple(false)));
-}
-
-// Tests that the body of ACTION() can reference the mock function's
-// return type.
-ACTION(InvokeDummy2) {
-  StaticAssertTypeEq<int, return_type>();
-  return_type result = Dummy(true);
-  return result;
-}
-
-TEST(ActionMacroTest, CanReferenceMockFunctionReturnType) {
-  Action<int(bool)> a1 = InvokeDummy2();
-  EXPECT_EQ(1, a1.Perform(std::make_tuple(true)));
-  EXPECT_EQ(1, a1.Perform(std::make_tuple(false)));
-}
-
-// Tests that ACTION() works for arguments passed by const reference.
-ACTION(ReturnAddrOfConstBoolReferenceArg) {
-  StaticAssertTypeEq<const bool&, arg1_type>();
-  return &arg1;
-}
-
-TEST(ActionMacroTest, WorksForConstReferenceArg) {
-  Action<const bool*(int, const bool&)> a = ReturnAddrOfConstBoolReferenceArg();
-  const bool b = false;
-  EXPECT_EQ(&b, a.Perform(std::tuple<int, const bool&>(0, b)));
-}
-
-// Tests that ACTION() works for arguments passed by non-const reference.
-ACTION(ReturnAddrOfIntReferenceArg) {
-  StaticAssertTypeEq<int&, arg0_type>();
-  return &arg0;
-}
-
-TEST(ActionMacroTest, WorksForNonConstReferenceArg) {
-  Action<int*(int&, bool, int)> a = ReturnAddrOfIntReferenceArg();
-  int n = 0;
-  EXPECT_EQ(&n, a.Perform(std::tuple<int&, bool, int>(n, true, 1)));
-}
-
-// Tests that ACTION() can be used in a namespace.
-namespace action_test {
-ACTION(Sum) { return arg0 + arg1; }
-}  // namespace action_test
-
-TEST(ActionMacroTest, WorksInNamespace) {
-  Action<int(int, int)> a1 = action_test::Sum();
-  EXPECT_EQ(3, a1.Perform(std::make_tuple(1, 2)));
-}
-
-// Tests that the same ACTION definition works for mock functions with
-// different argument numbers.
-ACTION(PlusTwo) { return arg0 + 2; }
-
-TEST(ActionMacroTest, WorksForDifferentArgumentNumbers) {
-  Action<int(int)> a1 = PlusTwo();
-  EXPECT_EQ(4, a1.Perform(std::make_tuple(2)));
-
-  Action<double(float, void*)> a2 = PlusTwo();
-  int dummy;
-  EXPECT_DOUBLE_EQ(6, a2.Perform(std::make_tuple(4.0f, &dummy)));
-}
-
-// Tests that ACTION_P can define a parameterized action.
-ACTION_P(Plus, n) { return arg0 + n; }
-
-TEST(ActionPMacroTest, DefinesParameterizedAction) {
-  Action<int(int m, bool t)> a1 = Plus(9);
-  EXPECT_EQ(10, a1.Perform(std::make_tuple(1, true)));
-}
-
-// Tests that the body of ACTION_P can reference the argument types
-// and the parameter type.
-ACTION_P(TypedPlus, n) {
-  arg0_type t1 = arg0;
-  n_type t2 = n;
-  return t1 + t2;
-}
-
-TEST(ActionPMacroTest, CanReferenceArgumentAndParameterTypes) {
-  Action<int(char m, bool t)> a1 = TypedPlus(9);
-  EXPECT_EQ(10, a1.Perform(std::make_tuple(Char(1), true)));
-}
-
-// Tests that a parameterized action can be used in any mock function
-// whose type is compatible.
-TEST(ActionPMacroTest, WorksInCompatibleMockFunction) {
-  Action<std::string(const std::string& s)> a1 = Plus("tail");
-  const std::string re = "re";
-  std::tuple<const std::string> dummy = std::make_tuple(re);
-  EXPECT_EQ("retail", a1.Perform(dummy));
-}
-
-// Tests that we can use ACTION*() to define actions overloaded on the
-// number of parameters.
-
-ACTION(OverloadedAction) { return arg0 ? arg1 : "hello"; }
-
-ACTION_P(OverloadedAction, default_value) {
-  return arg0 ? arg1 : default_value;
-}
-
-ACTION_P2(OverloadedAction, true_value, false_value) {
-  return arg0 ? true_value : false_value;
-}
-
-TEST(ActionMacroTest, CanDefineOverloadedActions) {
-  using MyAction = Action<const char*(bool, const char*)>;
-
-  const MyAction a1 = OverloadedAction();
-  EXPECT_STREQ("hello", a1.Perform(std::make_tuple(false, CharPtr("world"))));
-  EXPECT_STREQ("world", a1.Perform(std::make_tuple(true, CharPtr("world"))));
-
-  const MyAction a2 = OverloadedAction("hi");
-  EXPECT_STREQ("hi", a2.Perform(std::make_tuple(false, CharPtr("world"))));
-  EXPECT_STREQ("world", a2.Perform(std::make_tuple(true, CharPtr("world"))));
-
-  const MyAction a3 = OverloadedAction("hi", "you");
-  EXPECT_STREQ("hi", a3.Perform(std::make_tuple(true, CharPtr("world"))));
-  EXPECT_STREQ("you", a3.Perform(std::make_tuple(false, CharPtr("world"))));
-}
-
-// Tests ACTION_Pn where n >= 3.
-
-ACTION_P3(Plus, m, n, k) { return arg0 + m + n + k; }
-
-TEST(ActionPnMacroTest, WorksFor3Parameters) {
-  Action<double(int m, bool t)> a1 = Plus(100, 20, 3.4);
-  EXPECT_DOUBLE_EQ(3123.4, a1.Perform(std::make_tuple(3000, true)));
-
-  Action<std::string(const std::string& s)> a2 = Plus("tail", "-", ">");
-  const std::string re = "re";
-  std::tuple<const std::string> dummy = std::make_tuple(re);
-  EXPECT_EQ("retail->", a2.Perform(dummy));
-}
-
-ACTION_P4(Plus, p0, p1, p2, p3) { return arg0 + p0 + p1 + p2 + p3; }
-
-TEST(ActionPnMacroTest, WorksFor4Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4, a1.Perform(std::make_tuple(10)));
-}
-
-ACTION_P5(Plus, p0, p1, p2, p3, p4) { return arg0 + p0 + p1 + p2 + p3 + p4; }
-
-TEST(ActionPnMacroTest, WorksFor5Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4, 5);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4 + 5, a1.Perform(std::make_tuple(10)));
-}
-
-ACTION_P6(Plus, p0, p1, p2, p3, p4, p5) {
-  return arg0 + p0 + p1 + p2 + p3 + p4 + p5;
-}
-
-TEST(ActionPnMacroTest, WorksFor6Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4, 5, 6);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4 + 5 + 6, a1.Perform(std::make_tuple(10)));
-}
-
-ACTION_P7(Plus, p0, p1, p2, p3, p4, p5, p6) {
-  return arg0 + p0 + p1 + p2 + p3 + p4 + p5 + p6;
-}
-
-TEST(ActionPnMacroTest, WorksFor7Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4, 5, 6, 7);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4 + 5 + 6 + 7, a1.Perform(std::make_tuple(10)));
-}
-
-ACTION_P8(Plus, p0, p1, p2, p3, p4, p5, p6, p7) {
-  return arg0 + p0 + p1 + p2 + p3 + p4 + p5 + p6 + p7;
-}
-
-TEST(ActionPnMacroTest, WorksFor8Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4, 5, 6, 7, 8);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8,
-            a1.Perform(std::make_tuple(10)));
-}
-
-ACTION_P9(Plus, p0, p1, p2, p3, p4, p5, p6, p7, p8) {
-  return arg0 + p0 + p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8;
-}
-
-TEST(ActionPnMacroTest, WorksFor9Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4, 5, 6, 7, 8, 9);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9,
-            a1.Perform(std::make_tuple(10)));
-}
-
-ACTION_P10(Plus, p0, p1, p2, p3, p4, p5, p6, p7, p8, last_param) {
-  arg0_type t0 = arg0;
-  last_param_type t9 = last_param;
-  return t0 + p0 + p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8 + t9;
-}
-
-TEST(ActionPnMacroTest, WorksFor10Parameters) {
-  Action<int(int)> a1 = Plus(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-  EXPECT_EQ(10 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10,
-            a1.Perform(std::make_tuple(10)));
-}
-
-// Tests that the action body can promote the parameter types.
-
-ACTION_P2(PadArgument, prefix, suffix) {
-  // The following lines promote the two parameters to desired types.
-  std::string prefix_str(prefix);
-  char suffix_char = static_cast<char>(suffix);
-  return prefix_str + arg0 + suffix_char;
-}
-
-TEST(ActionPnMacroTest, SimpleTypePromotion) {
-  Action<std::string(const char*)> no_promo =
-      PadArgument(std::string("foo"), 'r');
-  Action<std::string(const char*)> promo =
-      PadArgument("foo", static_cast<int>('r'));
-  EXPECT_EQ("foobar", no_promo.Perform(std::make_tuple(CharPtr("ba"))));
-  EXPECT_EQ("foobar", promo.Perform(std::make_tuple(CharPtr("ba"))));
-}
-
-// Tests that we can partially restrict parameter types using a
-// straight-forward pattern.
-
-// Defines a generic action that doesn't restrict the types of its
-// parameters.
-ACTION_P3(ConcatImpl, a, b, c) {
-  std::stringstream ss;
-  ss << a << b << c;
-  return ss.str();
-}
-
-// Next, we try to restrict that either the first parameter is a
-// string, or the second parameter is an int.
-
-// Defines a partially specialized wrapper that restricts the first
-// parameter to std::string.
-template <typename T1, typename T2>
-// ConcatImplActionP3 is the class template ACTION_P3 uses to
-// implement ConcatImpl.  We shouldn't change the name as this
-// pattern requires the user to use it directly.
-ConcatImplActionP3<std::string, T1, T2> Concat(const std::string& a, T1 b,
-                                               T2 c) {
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (true) {
-    GTEST_INTENTIONAL_CONST_COND_POP_()
-    // This branch verifies that ConcatImpl() can be invoked without
-    // explicit template arguments.
-    return ConcatImpl(a, b, c);
-  } else {
-    // This branch verifies that ConcatImpl() can also be invoked with
-    // explicit template arguments.  It doesn't really need to be
-    // executed as this is a compile-time verification.
-    return ConcatImpl<std::string, T1, T2>(a, b, c);
-  }
-}
-
-// Defines another partially specialized wrapper that restricts the
-// second parameter to int.
-template <typename T1, typename T2>
-ConcatImplActionP3<T1, int, T2> Concat(T1 a, int b, T2 c) {
-  return ConcatImpl(a, b, c);
-}
-
-TEST(ActionPnMacroTest, CanPartiallyRestrictParameterTypes) {
-  Action<const std::string()> a1 = Concat("Hello", "1", 2);
-  EXPECT_EQ("Hello12", a1.Perform(std::make_tuple()));
-
-  a1 = Concat(1, 2, 3);
-  EXPECT_EQ("123", a1.Perform(std::make_tuple()));
-}
-
-// Verifies the type of an ACTION*.
-
-ACTION(DoFoo) {}
-ACTION_P(DoFoo, p) {}
-ACTION_P2(DoFoo, p0, p1) {}
-
-TEST(ActionPnMacroTest, TypesAreCorrect) {
-  // DoFoo() must be assignable to a DoFooAction variable.
-  DoFooAction a0 = DoFoo();
-
-  // DoFoo(1) must be assignable to a DoFooActionP variable.
-  DoFooActionP<int> a1 = DoFoo(1);
-
-  // DoFoo(p1, ..., pk) must be assignable to a DoFooActionPk
-  // variable, and so on.
-  DoFooActionP2<int, char> a2 = DoFoo(1, '2');
-  PlusActionP3<int, int, char> a3 = Plus(1, 2, '3');
-  PlusActionP4<int, int, int, char> a4 = Plus(1, 2, 3, '4');
-  PlusActionP5<int, int, int, int, char> a5 = Plus(1, 2, 3, 4, '5');
-  PlusActionP6<int, int, int, int, int, char> a6 = Plus(1, 2, 3, 4, 5, '6');
-  PlusActionP7<int, int, int, int, int, int, char> a7 =
-      Plus(1, 2, 3, 4, 5, 6, '7');
-  PlusActionP8<int, int, int, int, int, int, int, char> a8 =
-      Plus(1, 2, 3, 4, 5, 6, 7, '8');
-  PlusActionP9<int, int, int, int, int, int, int, int, char> a9 =
-      Plus(1, 2, 3, 4, 5, 6, 7, 8, '9');
-  PlusActionP10<int, int, int, int, int, int, int, int, int, char> a10 =
-      Plus(1, 2, 3, 4, 5, 6, 7, 8, 9, '0');
-
-  // Avoid "unused variable" warnings.
-  (void)a0;
-  (void)a1;
-  (void)a2;
-  (void)a3;
-  (void)a4;
-  (void)a5;
-  (void)a6;
-  (void)a7;
-  (void)a8;
-  (void)a9;
-  (void)a10;
-}
-
-// Tests that an ACTION_P*() action can be explicitly instantiated
-// with reference-typed parameters.
-
-ACTION_P(Plus1, x) { return x; }
-ACTION_P2(Plus2, x, y) { return x + y; }
-ACTION_P3(Plus3, x, y, z) { return x + y + z; }
-ACTION_P10(Plus10, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9) {
-  return a0 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9;
-}
-
-TEST(ActionPnMacroTest, CanExplicitlyInstantiateWithReferenceTypes) {
-  int x = 1, y = 2, z = 3;
-  const std::tuple<> empty = std::make_tuple();
-
-  Action<int()> a = Plus1<int&>(x);
-  EXPECT_EQ(1, a.Perform(empty));
-
-  a = Plus2<const int&, int&>(x, y);
-  EXPECT_EQ(3, a.Perform(empty));
-
-  a = Plus3<int&, const int&, int&>(x, y, z);
-  EXPECT_EQ(6, a.Perform(empty));
-
-  int n[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
-  a = Plus10<const int&, int&, const int&, int&, const int&, int&, const int&,
-             int&, const int&, int&>(n[0], n[1], n[2], n[3], n[4], n[5], n[6],
-                                     n[7], n[8], n[9]);
-  EXPECT_EQ(55, a.Perform(empty));
-}
-
-class TenArgConstructorClass {
- public:
-  TenArgConstructorClass(int a1, int a2, int a3, int a4, int a5, int a6, int a7,
-                         int a8, int a9, int a10)
-      : value_(a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10) {}
-  int value_;
-};
-
-// Tests that ACTION_TEMPLATE works when there is no value parameter.
-ACTION_TEMPLATE(CreateNew, HAS_1_TEMPLATE_PARAMS(typename, T),
-                AND_0_VALUE_PARAMS()) {
-  return new T;
-}
-
-TEST(ActionTemplateTest, WorksWithoutValueParam) {
-  const Action<int*()> a = CreateNew<int>();
-  int* p = a.Perform(std::make_tuple());
-  delete p;
-}
-
-// Tests that ACTION_TEMPLATE works when there are value parameters.
-ACTION_TEMPLATE(CreateNew, HAS_1_TEMPLATE_PARAMS(typename, T),
-                AND_1_VALUE_PARAMS(a0)) {
-  return new T(a0);
-}
-
-TEST(ActionTemplateTest, WorksWithValueParams) {
-  const Action<int*()> a = CreateNew<int>(42);
-  int* p = a.Perform(std::make_tuple());
-  EXPECT_EQ(42, *p);
-  delete p;
-}
-
-// Tests that ACTION_TEMPLATE works for integral template parameters.
-ACTION_TEMPLATE(MyDeleteArg, HAS_1_TEMPLATE_PARAMS(int, k),
-                AND_0_VALUE_PARAMS()) {
-  delete std::get<k>(args);
-}
-
-// Resets a bool variable in the destructor.
-class BoolResetter {
- public:
-  explicit BoolResetter(bool* value) : value_(value) {}
-  ~BoolResetter() { *value_ = false; }
-
- private:
-  bool* value_;
-};
-
-TEST(ActionTemplateTest, WorksForIntegralTemplateParams) {
-  const Action<void(int*, BoolResetter*)> a = MyDeleteArg<1>();
-  int n = 0;
-  bool b = true;
-  auto* resetter = new BoolResetter(&b);
-  a.Perform(std::make_tuple(&n, resetter));
-  EXPECT_FALSE(b);  // Verifies that resetter is deleted.
-}
-
-// Tests that ACTION_TEMPLATES works for template template parameters.
-ACTION_TEMPLATE(ReturnSmartPointer,
-                HAS_1_TEMPLATE_PARAMS(template <typename Pointee> class,
-                                      Pointer),
-                AND_1_VALUE_PARAMS(pointee)) {
-  return Pointer<pointee_type>(new pointee_type(pointee));
-}
-
-TEST(ActionTemplateTest, WorksForTemplateTemplateParameters) {
-  const Action<std::shared_ptr<int>()> a =
-      ReturnSmartPointer<std::shared_ptr>(42);
-  std::shared_ptr<int> p = a.Perform(std::make_tuple());
-  EXPECT_EQ(42, *p);
-}
-
-// Tests that ACTION_TEMPLATE works for 10 template parameters.
-template <typename T1, typename T2, typename T3, int k4, bool k5,
-          unsigned int k6, typename T7, typename T8, typename T9>
-struct GiantTemplate {
- public:
-  explicit GiantTemplate(int a_value) : value(a_value) {}
-  int value;
-};
-
-ACTION_TEMPLATE(ReturnGiant,
-                HAS_10_TEMPLATE_PARAMS(typename, T1, typename, T2, typename, T3,
-                                       int, k4, bool, k5, unsigned int, k6,
-                                       class, T7, class, T8, class, T9,
-                                       template <typename T> class, T10),
-                AND_1_VALUE_PARAMS(value)) {
-  return GiantTemplate<T10<T1>, T2, T3, k4, k5, k6, T7, T8, T9>(value);
-}
-
-TEST(ActionTemplateTest, WorksFor10TemplateParameters) {
-  using Giant = GiantTemplate<std::shared_ptr<int>, bool, double, 5, true, 6,
-                              char, unsigned, int>;
-  const Action<Giant()> a = ReturnGiant<int, bool, double, 5, true, 6, char,
-                                        unsigned, int, std::shared_ptr>(42);
-  Giant giant = a.Perform(std::make_tuple());
-  EXPECT_EQ(42, giant.value);
-}
-
-// Tests that ACTION_TEMPLATE works for 10 value parameters.
-ACTION_TEMPLATE(ReturnSum, HAS_1_TEMPLATE_PARAMS(typename, Number),
-                AND_10_VALUE_PARAMS(v1, v2, v3, v4, v5, v6, v7, v8, v9, v10)) {
-  return static_cast<Number>(v1) + v2 + v3 + v4 + v5 + v6 + v7 + v8 + v9 + v10;
-}
-
-TEST(ActionTemplateTest, WorksFor10ValueParameters) {
-  const Action<int()> a = ReturnSum<int>(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-  EXPECT_EQ(55, a.Perform(std::make_tuple()));
-}
-
-// Tests that ACTION_TEMPLATE and ACTION/ACTION_P* can be overloaded
-// on the number of value parameters.
-
-ACTION(ReturnSum) { return 0; }
-
-ACTION_P(ReturnSum, x) { return x; }
-
-ACTION_TEMPLATE(ReturnSum, HAS_1_TEMPLATE_PARAMS(typename, Number),
-                AND_2_VALUE_PARAMS(v1, v2)) {
-  return static_cast<Number>(v1) + v2;
-}
-
-ACTION_TEMPLATE(ReturnSum, HAS_1_TEMPLATE_PARAMS(typename, Number),
-                AND_3_VALUE_PARAMS(v1, v2, v3)) {
-  return static_cast<Number>(v1) + v2 + v3;
-}
-
-ACTION_TEMPLATE(ReturnSum, HAS_2_TEMPLATE_PARAMS(typename, Number, int, k),
-                AND_4_VALUE_PARAMS(v1, v2, v3, v4)) {
-  return static_cast<Number>(v1) + v2 + v3 + v4 + k;
-}
-
-TEST(ActionTemplateTest, CanBeOverloadedOnNumberOfValueParameters) {
-  const Action<int()> a0 = ReturnSum();
-  const Action<int()> a1 = ReturnSum(1);
-  const Action<int()> a2 = ReturnSum<int>(1, 2);
-  const Action<int()> a3 = ReturnSum<int>(1, 2, 3);
-  const Action<int()> a4 = ReturnSum<int, 10000>(2000, 300, 40, 5);
-  EXPECT_EQ(0, a0.Perform(std::make_tuple()));
-  EXPECT_EQ(1, a1.Perform(std::make_tuple()));
-  EXPECT_EQ(3, a2.Perform(std::make_tuple()));
-  EXPECT_EQ(6, a3.Perform(std::make_tuple()));
-  EXPECT_EQ(12345, a4.Perform(std::make_tuple()));
-}
-
-}  // namespace gmock_more_actions_test
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/test/gmock-nice-strict_test.cc b/third_party/googletest/googlemock/test/gmock-nice-strict_test.cc
deleted file mode 100644
index 25558eb..0000000
--- a/third_party/googletest/googlemock/test/gmock-nice-strict_test.cc
+++ /dev/null
@@ -1,539 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gmock/gmock-nice-strict.h"
-
-#include <string>
-#include <utility>
-#include "gmock/gmock.h"
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-
-// This must not be defined inside the ::testing namespace, or it will
-// clash with ::testing::Mock.
-class Mock {
- public:
-  Mock() {}
-
-  MOCK_METHOD0(DoThis, void());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mock);
-};
-
-namespace testing {
-namespace gmock_nice_strict_test {
-
-using testing::GMOCK_FLAG(verbose);
-using testing::HasSubstr;
-using testing::NaggyMock;
-using testing::NiceMock;
-using testing::StrictMock;
-
-#if GTEST_HAS_STREAM_REDIRECTION
-using testing::internal::CaptureStdout;
-using testing::internal::GetCapturedStdout;
-#endif
-
-// Class without default constructor.
-class NotDefaultConstructible {
- public:
-  explicit NotDefaultConstructible(int) {}
-};
-
-class CallsMockMethodInDestructor {
- public:
-  ~CallsMockMethodInDestructor() { OnDestroy(); }
-  MOCK_METHOD(void, OnDestroy, ());
-};
-
-// Defines some mock classes needed by the tests.
-
-class Foo {
- public:
-  virtual ~Foo() {}
-
-  virtual void DoThis() = 0;
-  virtual int DoThat(bool flag) = 0;
-};
-
-class MockFoo : public Foo {
- public:
-  MockFoo() {}
-  void Delete() { delete this; }
-
-  MOCK_METHOD0(DoThis, void());
-  MOCK_METHOD1(DoThat, int(bool flag));
-  MOCK_METHOD0(ReturnNonDefaultConstructible, NotDefaultConstructible());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
-};
-
-class MockBar {
- public:
-  explicit MockBar(const std::string& s) : str_(s) {}
-
-  MockBar(char a1, char a2, std::string a3, std::string a4, int a5, int a6,
-          const std::string& a7, const std::string& a8, bool a9, bool a10) {
-    str_ = std::string() + a1 + a2 + a3 + a4 + static_cast<char>(a5) +
-        static_cast<char>(a6) + a7 + a8 + (a9 ? 'T' : 'F') + (a10 ? 'T' : 'F');
-  }
-
-  virtual ~MockBar() {}
-
-  const std::string& str() const { return str_; }
-
-  MOCK_METHOD0(This, int());
-  MOCK_METHOD2(That, std::string(int, bool));
-
- private:
-  std::string str_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockBar);
-};
-
-
-class MockBaz {
- public:
-  class MoveOnly {
-   public:
-    MoveOnly() = default;
-
-    MoveOnly(const MoveOnly&) = delete;
-    MoveOnly& operator=(const MoveOnly&) = delete;
-
-    MoveOnly(MoveOnly&&) = default;
-    MoveOnly& operator=(MoveOnly&&) = default;
-  };
-
-  MockBaz(MoveOnly) {}
-};
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that a raw mock generates warnings for uninteresting calls.
-TEST(RawMockTest, WarningForUninterestingCall) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "warning";
-
-  MockFoo raw_foo;
-
-  CaptureStdout();
-  raw_foo.DoThis();
-  raw_foo.DoThat(true);
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-// Tests that a raw mock generates warnings for uninteresting calls
-// that delete the mock object.
-TEST(RawMockTest, WarningForUninterestingCallAfterDeath) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "warning";
-
-  MockFoo* const raw_foo = new MockFoo;
-
-  ON_CALL(*raw_foo, DoThis())
-      .WillByDefault(Invoke(raw_foo, &MockFoo::Delete));
-
-  CaptureStdout();
-  raw_foo->DoThis();
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-// Tests that a raw mock generates informational logs for
-// uninteresting calls.
-TEST(RawMockTest, InfoForUninterestingCall) {
-  MockFoo raw_foo;
-
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "info";
-  CaptureStdout();
-  raw_foo.DoThis();
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-TEST(RawMockTest, IsNaggy_IsNice_IsStrict) {
-  MockFoo raw_foo;
-  EXPECT_TRUE(Mock::IsNaggy(&raw_foo));
-  EXPECT_FALSE(Mock::IsNice(&raw_foo));
-  EXPECT_FALSE(Mock::IsStrict(&raw_foo));
-}
-
-// Tests that a nice mock generates no warning for uninteresting calls.
-TEST(NiceMockTest, NoWarningForUninterestingCall) {
-  NiceMock<MockFoo> nice_foo;
-
-  CaptureStdout();
-  nice_foo.DoThis();
-  nice_foo.DoThat(true);
-  EXPECT_EQ("", GetCapturedStdout());
-}
-
-// Tests that a nice mock generates no warning for uninteresting calls
-// that delete the mock object.
-TEST(NiceMockTest, NoWarningForUninterestingCallAfterDeath) {
-  NiceMock<MockFoo>* const nice_foo = new NiceMock<MockFoo>;
-
-  ON_CALL(*nice_foo, DoThis())
-      .WillByDefault(Invoke(nice_foo, &MockFoo::Delete));
-
-  CaptureStdout();
-  nice_foo->DoThis();
-  EXPECT_EQ("", GetCapturedStdout());
-}
-
-// Tests that a nice mock generates informational logs for
-// uninteresting calls.
-TEST(NiceMockTest, InfoForUninterestingCall) {
-  NiceMock<MockFoo> nice_foo;
-
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "info";
-  CaptureStdout();
-  nice_foo.DoThis();
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that a nice mock allows expected calls.
-TEST(NiceMockTest, AllowsExpectedCall) {
-  NiceMock<MockFoo> nice_foo;
-
-  EXPECT_CALL(nice_foo, DoThis());
-  nice_foo.DoThis();
-}
-
-// Tests that an unexpected call on a nice mock which returns a
-// not-default-constructible type throws an exception and the exception contains
-// the method's name.
-TEST(NiceMockTest, ThrowsExceptionForUnknownReturnTypes) {
-  NiceMock<MockFoo> nice_foo;
-#if GTEST_HAS_EXCEPTIONS
-  try {
-    nice_foo.ReturnNonDefaultConstructible();
-    FAIL();
-  } catch (const std::runtime_error& ex) {
-    EXPECT_THAT(ex.what(), HasSubstr("ReturnNonDefaultConstructible"));
-  }
-#else
-  EXPECT_DEATH_IF_SUPPORTED({ nice_foo.ReturnNonDefaultConstructible(); }, "");
-#endif
-}
-
-// Tests that an unexpected call on a nice mock fails.
-TEST(NiceMockTest, UnexpectedCallFails) {
-  NiceMock<MockFoo> nice_foo;
-
-  EXPECT_CALL(nice_foo, DoThis()).Times(0);
-  EXPECT_NONFATAL_FAILURE(nice_foo.DoThis(), "called more times than expected");
-}
-
-// Tests that NiceMock works with a mock class that has a non-default
-// constructor.
-TEST(NiceMockTest, NonDefaultConstructor) {
-  NiceMock<MockBar> nice_bar("hi");
-  EXPECT_EQ("hi", nice_bar.str());
-
-  nice_bar.This();
-  nice_bar.That(5, true);
-}
-
-// Tests that NiceMock works with a mock class that has a 10-ary
-// non-default constructor.
-TEST(NiceMockTest, NonDefaultConstructor10) {
-  NiceMock<MockBar> nice_bar('a', 'b', "c", "d", 'e', 'f',
-                             "g", "h", true, false);
-  EXPECT_EQ("abcdefghTF", nice_bar.str());
-
-  nice_bar.This();
-  nice_bar.That(5, true);
-}
-
-TEST(NiceMockTest, AllowLeak) {
-  NiceMock<MockFoo>* leaked = new NiceMock<MockFoo>;
-  Mock::AllowLeak(leaked);
-  EXPECT_CALL(*leaked, DoThis());
-  leaked->DoThis();
-}
-
-TEST(NiceMockTest, MoveOnlyConstructor) {
-  NiceMock<MockBaz> nice_baz(MockBaz::MoveOnly{});
-}
-
-// Tests that NiceMock<Mock> compiles where Mock is a user-defined
-// class (as opposed to ::testing::Mock).
-TEST(NiceMockTest, AcceptsClassNamedMock) {
-  NiceMock< ::Mock> nice;
-  EXPECT_CALL(nice, DoThis());
-  nice.DoThis();
-}
-
-TEST(NiceMockTest, IsNiceInDestructor) {
-  {
-    NiceMock<CallsMockMethodInDestructor> nice_on_destroy;
-    // Don't add an expectation for the call before the mock goes out of scope.
-  }
-}
-
-TEST(NiceMockTest, IsNaggy_IsNice_IsStrict) {
-  NiceMock<MockFoo> nice_foo;
-  EXPECT_FALSE(Mock::IsNaggy(&nice_foo));
-  EXPECT_TRUE(Mock::IsNice(&nice_foo));
-  EXPECT_FALSE(Mock::IsStrict(&nice_foo));
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that a naggy mock generates warnings for uninteresting calls.
-TEST(NaggyMockTest, WarningForUninterestingCall) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "warning";
-
-  NaggyMock<MockFoo> naggy_foo;
-
-  CaptureStdout();
-  naggy_foo.DoThis();
-  naggy_foo.DoThat(true);
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-// Tests that a naggy mock generates a warning for an uninteresting call
-// that deletes the mock object.
-TEST(NaggyMockTest, WarningForUninterestingCallAfterDeath) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "warning";
-
-  NaggyMock<MockFoo>* const naggy_foo = new NaggyMock<MockFoo>;
-
-  ON_CALL(*naggy_foo, DoThis())
-      .WillByDefault(Invoke(naggy_foo, &MockFoo::Delete));
-
-  CaptureStdout();
-  naggy_foo->DoThis();
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that a naggy mock allows expected calls.
-TEST(NaggyMockTest, AllowsExpectedCall) {
-  NaggyMock<MockFoo> naggy_foo;
-
-  EXPECT_CALL(naggy_foo, DoThis());
-  naggy_foo.DoThis();
-}
-
-// Tests that an unexpected call on a naggy mock fails.
-TEST(NaggyMockTest, UnexpectedCallFails) {
-  NaggyMock<MockFoo> naggy_foo;
-
-  EXPECT_CALL(naggy_foo, DoThis()).Times(0);
-  EXPECT_NONFATAL_FAILURE(naggy_foo.DoThis(),
-                          "called more times than expected");
-}
-
-// Tests that NaggyMock works with a mock class that has a non-default
-// constructor.
-TEST(NaggyMockTest, NonDefaultConstructor) {
-  NaggyMock<MockBar> naggy_bar("hi");
-  EXPECT_EQ("hi", naggy_bar.str());
-
-  naggy_bar.This();
-  naggy_bar.That(5, true);
-}
-
-// Tests that NaggyMock works with a mock class that has a 10-ary
-// non-default constructor.
-TEST(NaggyMockTest, NonDefaultConstructor10) {
-  NaggyMock<MockBar> naggy_bar('0', '1', "2", "3", '4', '5',
-                               "6", "7", true, false);
-  EXPECT_EQ("01234567TF", naggy_bar.str());
-
-  naggy_bar.This();
-  naggy_bar.That(5, true);
-}
-
-TEST(NaggyMockTest, AllowLeak) {
-  NaggyMock<MockFoo>* leaked = new NaggyMock<MockFoo>;
-  Mock::AllowLeak(leaked);
-  EXPECT_CALL(*leaked, DoThis());
-  leaked->DoThis();
-}
-
-TEST(NaggyMockTest, MoveOnlyConstructor) {
-  NaggyMock<MockBaz> naggy_baz(MockBaz::MoveOnly{});
-}
-
-// Tests that NaggyMock<Mock> compiles where Mock is a user-defined
-// class (as opposed to ::testing::Mock).
-TEST(NaggyMockTest, AcceptsClassNamedMock) {
-  NaggyMock< ::Mock> naggy;
-  EXPECT_CALL(naggy, DoThis());
-  naggy.DoThis();
-}
-
-TEST(NaggyMockTest, IsNaggyInDestructor) {
-  const std::string saved_flag = GMOCK_FLAG(verbose);
-  GMOCK_FLAG(verbose) = "warning";
-  CaptureStdout();
-
-  {
-    NaggyMock<CallsMockMethodInDestructor> naggy_on_destroy;
-    // Don't add an expectation for the call before the mock goes out of scope.
-  }
-
-  EXPECT_THAT(GetCapturedStdout(),
-              HasSubstr("Uninteresting mock function call"));
-
-  GMOCK_FLAG(verbose) = saved_flag;
-}
-
-TEST(NaggyMockTest, IsNaggy_IsNice_IsStrict) {
-  NaggyMock<MockFoo> naggy_foo;
-  EXPECT_TRUE(Mock::IsNaggy(&naggy_foo));
-  EXPECT_FALSE(Mock::IsNice(&naggy_foo));
-  EXPECT_FALSE(Mock::IsStrict(&naggy_foo));
-}
-
-// Tests that a strict mock allows expected calls.
-TEST(StrictMockTest, AllowsExpectedCall) {
-  StrictMock<MockFoo> strict_foo;
-
-  EXPECT_CALL(strict_foo, DoThis());
-  strict_foo.DoThis();
-}
-
-// Tests that an unexpected call on a strict mock fails.
-TEST(StrictMockTest, UnexpectedCallFails) {
-  StrictMock<MockFoo> strict_foo;
-
-  EXPECT_CALL(strict_foo, DoThis()).Times(0);
-  EXPECT_NONFATAL_FAILURE(strict_foo.DoThis(),
-                          "called more times than expected");
-}
-
-// Tests that an uninteresting call on a strict mock fails.
-TEST(StrictMockTest, UninterestingCallFails) {
-  StrictMock<MockFoo> strict_foo;
-
-  EXPECT_NONFATAL_FAILURE(strict_foo.DoThis(),
-                          "Uninteresting mock function call");
-}
-
-// Tests that an uninteresting call on a strict mock fails, even if
-// the call deletes the mock object.
-TEST(StrictMockTest, UninterestingCallFailsAfterDeath) {
-  StrictMock<MockFoo>* const strict_foo = new StrictMock<MockFoo>;
-
-  ON_CALL(*strict_foo, DoThis())
-      .WillByDefault(Invoke(strict_foo, &MockFoo::Delete));
-
-  EXPECT_NONFATAL_FAILURE(strict_foo->DoThis(),
-                          "Uninteresting mock function call");
-}
-
-// Tests that StrictMock works with a mock class that has a
-// non-default constructor.
-TEST(StrictMockTest, NonDefaultConstructor) {
-  StrictMock<MockBar> strict_bar("hi");
-  EXPECT_EQ("hi", strict_bar.str());
-
-  EXPECT_NONFATAL_FAILURE(strict_bar.That(5, true),
-                          "Uninteresting mock function call");
-}
-
-// Tests that StrictMock works with a mock class that has a 10-ary
-// non-default constructor.
-TEST(StrictMockTest, NonDefaultConstructor10) {
-  StrictMock<MockBar> strict_bar('a', 'b', "c", "d", 'e', 'f',
-                                 "g", "h", true, false);
-  EXPECT_EQ("abcdefghTF", strict_bar.str());
-
-  EXPECT_NONFATAL_FAILURE(strict_bar.That(5, true),
-                          "Uninteresting mock function call");
-}
-
-TEST(StrictMockTest, AllowLeak) {
-  StrictMock<MockFoo>* leaked = new StrictMock<MockFoo>;
-  Mock::AllowLeak(leaked);
-  EXPECT_CALL(*leaked, DoThis());
-  leaked->DoThis();
-}
-
-TEST(StrictMockTest, MoveOnlyConstructor) {
-  StrictMock<MockBaz> strict_baz(MockBaz::MoveOnly{});
-}
-
-// Tests that StrictMock<Mock> compiles where Mock is a user-defined
-// class (as opposed to ::testing::Mock).
-TEST(StrictMockTest, AcceptsClassNamedMock) {
-  StrictMock< ::Mock> strict;
-  EXPECT_CALL(strict, DoThis());
-  strict.DoThis();
-}
-
-TEST(StrictMockTest, IsStrictInDestructor) {
-  EXPECT_NONFATAL_FAILURE(
-      {
-        StrictMock<CallsMockMethodInDestructor> strict_on_destroy;
-        // Don't add an expectation for the call before the mock goes out of
-        // scope.
-      },
-      "Uninteresting mock function call");
-}
-
-TEST(StrictMockTest, IsNaggy_IsNice_IsStrict) {
-  StrictMock<MockFoo> strict_foo;
-  EXPECT_FALSE(Mock::IsNaggy(&strict_foo));
-  EXPECT_FALSE(Mock::IsNice(&strict_foo));
-  EXPECT_TRUE(Mock::IsStrict(&strict_foo));
-}
-
-}  // namespace gmock_nice_strict_test
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/test/gmock-port_test.cc b/third_party/googletest/googlemock/test/gmock-port_test.cc
deleted file mode 100644
index a2c2be2..0000000
--- a/third_party/googletest/googlemock/test/gmock-port_test.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the internal cross-platform support utilities.
-
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-// NOTE: if this file is left without tests for some reason, put a dummy
-// test here to make references to symbols in the gtest library and avoid
-// 'undefined symbol' linker errors in gmock_main:
-
-TEST(DummyTest, Dummy) {}
diff --git a/third_party/googletest/googlemock/test/gmock-pp-string_test.cc b/third_party/googletest/googlemock/test/gmock-pp-string_test.cc
deleted file mode 100644
index 6f66cf1..0000000
--- a/third_party/googletest/googlemock/test/gmock-pp-string_test.cc
+++ /dev/null
@@ -1,206 +0,0 @@
-// Copyright 2018, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the internal preprocessor macro library.
-#include "gmock/internal/gmock-pp.h"
-
-#include <string>
-
-#include "gmock/gmock.h"
-
-namespace testing {
-namespace {
-
-// Matcher to verify that to strings are identical up to whitespace
-// Not 100% correct, because it treats "AB" as equal to "A B".
-::testing::Matcher<const std::string&> SameExceptSpaces(const std::string& s) {
-  auto remove_spaces = [](std::string to_split) {
-    to_split.erase(std::remove(to_split.begin(), to_split.end(), ' '),
-                   to_split.end());
-    return to_split;
-  };
-  return ::testing::ResultOf(remove_spaces, remove_spaces(s));
-}
-
-// Verify that a macro expands to a given text. Ignores whitespace difference.
-// In MSVC, GMOCK_PP_STRINGIZE() returns nothing, rather than "". So concatenate
-// with an empty string.
-#define EXPECT_EXPANSION(Result, Macro) \
-  EXPECT_THAT("" GMOCK_PP_STRINGIZE(Macro), SameExceptSpaces(Result))
-
-TEST(Macros, Cat) {
-  EXPECT_EXPANSION("14", GMOCK_PP_CAT(1, 4));
-  EXPECT_EXPANSION("+=", GMOCK_PP_CAT(+, =));
-}
-
-TEST(Macros, Narg) {
-  EXPECT_EXPANSION("1", GMOCK_PP_NARG());
-  EXPECT_EXPANSION("1", GMOCK_PP_NARG(x));
-  EXPECT_EXPANSION("2", GMOCK_PP_NARG(x, y));
-  EXPECT_EXPANSION("3", GMOCK_PP_NARG(x, y, z));
-  EXPECT_EXPANSION("4", GMOCK_PP_NARG(x, y, z, w));
-
-  EXPECT_EXPANSION("0", GMOCK_PP_NARG0());
-  EXPECT_EXPANSION("1", GMOCK_PP_NARG0(x));
-  EXPECT_EXPANSION("2", GMOCK_PP_NARG0(x, y));
-}
-
-TEST(Macros, Comma) {
-  EXPECT_EXPANSION("0", GMOCK_PP_HAS_COMMA());
-  EXPECT_EXPANSION("1", GMOCK_PP_HAS_COMMA(, ));
-  EXPECT_EXPANSION("0", GMOCK_PP_HAS_COMMA((, )));
-}
-
-TEST(Macros, IsEmpty) {
-  EXPECT_EXPANSION("1", GMOCK_PP_IS_EMPTY());
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(, ));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(a));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_EMPTY(()));
-
-#define GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1
-  EXPECT_EXPANSION("1", GMOCK_PP_IS_EMPTY(GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1));
-}
-
-TEST(Macros, If) {
-  EXPECT_EXPANSION("1", GMOCK_PP_IF(1, 1, 2));
-  EXPECT_EXPANSION("2", GMOCK_PP_IF(0, 1, 2));
-}
-
-TEST(Macros, HeadTail) {
-  EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1));
-  EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1, 2));
-  EXPECT_EXPANSION("1", GMOCK_PP_HEAD(1, 2, 3));
-
-  EXPECT_EXPANSION("", GMOCK_PP_TAIL(1));
-  EXPECT_EXPANSION("2", GMOCK_PP_TAIL(1, 2));
-  EXPECT_EXPANSION("2", GMOCK_PP_HEAD(GMOCK_PP_TAIL(1, 2, 3)));
-}
-
-TEST(Macros, Parentheses) {
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss()));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_BEGIN_PARENS(sss() sss));
-  EXPECT_EXPANSION("1", GMOCK_PP_IS_BEGIN_PARENS((sss)));
-  EXPECT_EXPANSION("1", GMOCK_PP_IS_BEGIN_PARENS((sss)ss));
-
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss()));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS(sss() sss));
-  EXPECT_EXPANSION("1", GMOCK_PP_IS_ENCLOSED_PARENS((sss)));
-  EXPECT_EXPANSION("0", GMOCK_PP_IS_ENCLOSED_PARENS((sss)ss));
-
-  EXPECT_EXPANSION("1 + 1", GMOCK_PP_REMOVE_PARENS((1 + 1)));
-}
-
-TEST(Macros, Increment) {
-  EXPECT_EXPANSION("1", GMOCK_PP_INC(0));
-  EXPECT_EXPANSION("2", GMOCK_PP_INC(1));
-  EXPECT_EXPANSION("3", GMOCK_PP_INC(2));
-  EXPECT_EXPANSION("4", GMOCK_PP_INC(3));
-  EXPECT_EXPANSION("5", GMOCK_PP_INC(4));
-
-  EXPECT_EXPANSION("16", GMOCK_PP_INC(15));
-}
-
-#define JOINER_CAT(a, b) a##b
-#define JOINER(_N, _Data, _Elem) JOINER_CAT(_Data, _N) = _Elem
-
-TEST(Macros, Repeat) {
-  EXPECT_EXPANSION("", GMOCK_PP_REPEAT(JOINER, X, 0));
-  EXPECT_EXPANSION("X0=", GMOCK_PP_REPEAT(JOINER, X, 1));
-  EXPECT_EXPANSION("X0= X1=", GMOCK_PP_REPEAT(JOINER, X, 2));
-  EXPECT_EXPANSION("X0= X1= X2=", GMOCK_PP_REPEAT(JOINER, X, 3));
-  EXPECT_EXPANSION("X0= X1= X2= X3=", GMOCK_PP_REPEAT(JOINER, X, 4));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4=", GMOCK_PP_REPEAT(JOINER, X, 5));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5=", GMOCK_PP_REPEAT(JOINER, X, 6));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6=",
-                   GMOCK_PP_REPEAT(JOINER, X, 7));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7=",
-                   GMOCK_PP_REPEAT(JOINER, X, 8));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8=",
-                   GMOCK_PP_REPEAT(JOINER, X, 9));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9=",
-                   GMOCK_PP_REPEAT(JOINER, X, 10));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10=",
-                   GMOCK_PP_REPEAT(JOINER, X, 11));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11=",
-                   GMOCK_PP_REPEAT(JOINER, X, 12));
-  EXPECT_EXPANSION("X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12=",
-                   GMOCK_PP_REPEAT(JOINER, X, 13));
-  EXPECT_EXPANSION(
-      "X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12= X13=",
-      GMOCK_PP_REPEAT(JOINER, X, 14));
-  EXPECT_EXPANSION(
-      "X0= X1= X2= X3= X4= X5= X6= X7= X8= X9= X10= X11= X12= X13= X14=",
-      GMOCK_PP_REPEAT(JOINER, X, 15));
-}
-TEST(Macros, ForEach) {
-  EXPECT_EXPANSION("", GMOCK_PP_FOR_EACH(JOINER, X, ()));
-  EXPECT_EXPANSION("X0=a", GMOCK_PP_FOR_EACH(JOINER, X, (a)));
-  EXPECT_EXPANSION("X0=a X1=b", GMOCK_PP_FOR_EACH(JOINER, X, (a, b)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c", GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c X3=d",
-                   GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e",
-                   GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f",
-                   GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g",
-                   GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h",
-                   GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h)));
-  EXPECT_EXPANSION("X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i",
-                   GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i)));
-  EXPECT_EXPANSION(
-      "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j",
-      GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j)));
-  EXPECT_EXPANSION(
-      "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k",
-      GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k)));
-  EXPECT_EXPANSION(
-      "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l",
-      GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l)));
-  EXPECT_EXPANSION(
-      "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l X12=m",
-      GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l, m)));
-  EXPECT_EXPANSION(
-      "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l X12=m "
-      "X13=n",
-      GMOCK_PP_FOR_EACH(JOINER, X, (a, b, c, d, e, f, g, h, i, j, k, l, m, n)));
-  EXPECT_EXPANSION(
-      "X0=a X1=b X2=c X3=d X4=e X5=f X6=g X7=h X8=i X9=j X10=k X11=l X12=m "
-      "X13=n X14=o",
-      GMOCK_PP_FOR_EACH(JOINER, X,
-                        (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o)));
-}
-
-}  // namespace
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/test/gmock-pp_test.cc b/third_party/googletest/googlemock/test/gmock-pp_test.cc
deleted file mode 100644
index 5d1566e..0000000
--- a/third_party/googletest/googlemock/test/gmock-pp_test.cc
+++ /dev/null
@@ -1,83 +0,0 @@
-#include "gmock/internal/gmock-pp.h"
-
-// Used to test MSVC treating __VA_ARGS__ with a comma in it as one value
-#define GMOCK_TEST_REPLACE_comma_WITH_COMMA_I_comma ,
-#define GMOCK_TEST_REPLACE_comma_WITH_COMMA(x) \
-  GMOCK_PP_CAT(GMOCK_TEST_REPLACE_comma_WITH_COMMA_I_, x)
-
-// Static assertions.
-namespace testing {
-namespace internal {
-namespace gmockpp {
-
-static_assert(GMOCK_PP_CAT(1, 4) == 14, "");
-static_assert(GMOCK_PP_INTERNAL_INTERNAL_16TH(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
-                                              12, 13, 14, 15, 16, 17, 18) == 16,
-              "");
-static_assert(GMOCK_PP_NARG() == 1, "");
-static_assert(GMOCK_PP_NARG(x) == 1, "");
-static_assert(GMOCK_PP_NARG(x, y) == 2, "");
-static_assert(GMOCK_PP_NARG(x, y, z) == 3, "");
-static_assert(GMOCK_PP_NARG(x, y, z, w) == 4, "");
-static_assert(!GMOCK_PP_HAS_COMMA(), "");
-static_assert(GMOCK_PP_HAS_COMMA(b, ), "");
-static_assert(!GMOCK_PP_HAS_COMMA((, )), "");
-static_assert(GMOCK_PP_HAS_COMMA(GMOCK_TEST_REPLACE_comma_WITH_COMMA(comma)),
-              "");
-static_assert(
-    GMOCK_PP_HAS_COMMA(GMOCK_TEST_REPLACE_comma_WITH_COMMA(comma(unrelated))),
-    "");
-static_assert(!GMOCK_PP_IS_EMPTY(, ), "");
-static_assert(!GMOCK_PP_IS_EMPTY(a), "");
-static_assert(!GMOCK_PP_IS_EMPTY(()), "");
-static_assert(GMOCK_PP_IF(1, 1, 2) == 1, "");
-static_assert(GMOCK_PP_IF(0, 1, 2) == 2, "");
-static_assert(GMOCK_PP_NARG0(x) == 1, "");
-static_assert(GMOCK_PP_NARG0(x, y) == 2, "");
-static_assert(GMOCK_PP_HEAD(1) == 1, "");
-static_assert(GMOCK_PP_HEAD(1, 2) == 1, "");
-static_assert(GMOCK_PP_HEAD(1, 2, 3) == 1, "");
-static_assert(GMOCK_PP_TAIL(1, 2) == 2, "");
-static_assert(GMOCK_PP_HEAD(GMOCK_PP_TAIL(1, 2, 3)) == 2, "");
-static_assert(!GMOCK_PP_IS_BEGIN_PARENS(sss), "");
-static_assert(!GMOCK_PP_IS_BEGIN_PARENS(sss()), "");
-static_assert(!GMOCK_PP_IS_BEGIN_PARENS(sss() sss), "");
-static_assert(GMOCK_PP_IS_BEGIN_PARENS((sss)), "");
-static_assert(GMOCK_PP_IS_BEGIN_PARENS((sss)ss), "");
-static_assert(!GMOCK_PP_IS_ENCLOSED_PARENS(sss), "");
-static_assert(!GMOCK_PP_IS_ENCLOSED_PARENS(sss()), "");
-static_assert(!GMOCK_PP_IS_ENCLOSED_PARENS(sss() sss), "");
-static_assert(!GMOCK_PP_IS_ENCLOSED_PARENS((sss)ss), "");
-static_assert(GMOCK_PP_REMOVE_PARENS((1 + 1)) * 2 == 3, "");
-static_assert(GMOCK_PP_INC(4) == 5, "");
-
-template <class... Args>
-struct Test {
-  static constexpr int kArgs = sizeof...(Args);
-};
-#define GMOCK_PP_INTERNAL_TYPE_TEST(_i, _Data, _element) \
-  GMOCK_PP_COMMA_IF(_i) _element
-static_assert(Test<GMOCK_PP_FOR_EACH(GMOCK_PP_INTERNAL_TYPE_TEST, ~,
-                                     (int, float, double, char))>::kArgs == 4,
-              "");
-#define GMOCK_PP_INTERNAL_VAR_TEST_1(_x) 1
-#define GMOCK_PP_INTERNAL_VAR_TEST_2(_x, _y) 2
-#define GMOCK_PP_INTERNAL_VAR_TEST_3(_x, _y, _z) 3
-
-#define GMOCK_PP_INTERNAL_VAR_TEST(...) \
-  GMOCK_PP_VARIADIC_CALL(GMOCK_PP_INTERNAL_VAR_TEST_, __VA_ARGS__)
-static_assert(GMOCK_PP_INTERNAL_VAR_TEST(x, y) == 2, "");
-static_assert(GMOCK_PP_INTERNAL_VAR_TEST(silly) == 1, "");
-static_assert(GMOCK_PP_INTERNAL_VAR_TEST(x, y, z) == 3, "");
-
-// TODO(iserna): The following asserts fail in --config=lexan.
-#define GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1
-static_assert(GMOCK_PP_IS_EMPTY(GMOCK_PP_INTERNAL_IS_EMPTY_TEST_1), "");
-static_assert(GMOCK_PP_IS_EMPTY(), "");
-static_assert(GMOCK_PP_IS_ENCLOSED_PARENS((sss)), "");
-static_assert(GMOCK_PP_IS_EMPTY(GMOCK_PP_TAIL(1)), "");
-static_assert(GMOCK_PP_NARG0() == 0, "");
-
-}  // namespace gmockpp
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googlemock/test/gmock-spec-builders_test.cc b/third_party/googletest/googlemock/test/gmock-spec-builders_test.cc
deleted file mode 100644
index fa97411..0000000
--- a/third_party/googletest/googlemock/test/gmock-spec-builders_test.cc
+++ /dev/null
@@ -1,2775 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the spec builder syntax.
-
-#include "gmock/gmock-spec-builders.h"
-
-#include <memory>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-
-#include "gmock/gmock.h"
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-namespace internal {
-
-// Helper class for testing the Expectation class template.
-class ExpectationTester {
- public:
-  // Sets the call count of the given expectation to the given number.
-  void SetCallCount(int n, ExpectationBase* exp) {
-    exp->call_count_ = n;
-  }
-};
-
-}  // namespace internal
-}  // namespace testing
-
-namespace {
-
-using testing::_;
-using testing::AnyNumber;
-using testing::AtLeast;
-using testing::AtMost;
-using testing::Between;
-using testing::Cardinality;
-using testing::CardinalityInterface;
-using testing::Const;
-using testing::ContainsRegex;
-using testing::DoAll;
-using testing::DoDefault;
-using testing::Eq;
-using testing::Expectation;
-using testing::ExpectationSet;
-using testing::GMOCK_FLAG(verbose);
-using testing::Gt;
-using testing::IgnoreResult;
-using testing::InSequence;
-using testing::Invoke;
-using testing::InvokeWithoutArgs;
-using testing::IsNotSubstring;
-using testing::IsSubstring;
-using testing::Lt;
-using testing::Message;
-using testing::Mock;
-using testing::NaggyMock;
-using testing::Ne;
-using testing::Return;
-using testing::SaveArg;
-using testing::Sequence;
-using testing::SetArgPointee;
-using testing::internal::ExpectationTester;
-using testing::internal::FormatFileLocation;
-using testing::internal::kAllow;
-using testing::internal::kErrorVerbosity;
-using testing::internal::kFail;
-using testing::internal::kInfoVerbosity;
-using testing::internal::kWarn;
-using testing::internal::kWarningVerbosity;
-
-#if GTEST_HAS_STREAM_REDIRECTION
-using testing::HasSubstr;
-using testing::internal::CaptureStdout;
-using testing::internal::GetCapturedStdout;
-#endif
-
-class Incomplete;
-
-class MockIncomplete {
- public:
-  // This line verifies that a mock method can take a by-reference
-  // argument of an incomplete type.
-  MOCK_METHOD1(ByRefFunc, void(const Incomplete& x));
-};
-
-// Tells Google Mock how to print a value of type Incomplete.
-void PrintTo(const Incomplete& x, ::std::ostream* os);
-
-TEST(MockMethodTest, CanInstantiateWithIncompleteArgType) {
-  // Even though this mock class contains a mock method that takes
-  // by-reference an argument whose type is incomplete, we can still
-  // use the mock, as long as Google Mock knows how to print the
-  // argument.
-  MockIncomplete incomplete;
-  EXPECT_CALL(incomplete, ByRefFunc(_))
-      .Times(AnyNumber());
-}
-
-// The definition of the printer for the argument type doesn't have to
-// be visible where the mock is used.
-void PrintTo(const Incomplete& /* x */, ::std::ostream* os) {
-  *os << "incomplete";
-}
-
-class Result {};
-
-// A type that's not default constructible.
-class NonDefaultConstructible {
- public:
-  explicit NonDefaultConstructible(int /* dummy */) {}
-};
-
-class MockA {
- public:
-  MockA() {}
-
-  MOCK_METHOD1(DoA, void(int n));
-  MOCK_METHOD1(ReturnResult, Result(int n));
-  MOCK_METHOD0(ReturnNonDefaultConstructible, NonDefaultConstructible());
-  MOCK_METHOD2(Binary, bool(int x, int y));
-  MOCK_METHOD2(ReturnInt, int(int x, int y));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockA);
-};
-
-class MockB {
- public:
-  MockB() {}
-
-  MOCK_CONST_METHOD0(DoB, int());  // NOLINT
-  MOCK_METHOD1(DoB, int(int n));  // NOLINT
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockB);
-};
-
-class ReferenceHoldingMock {
- public:
-  ReferenceHoldingMock() {}
-
-  MOCK_METHOD1(AcceptReference, void(std::shared_ptr<MockA>*));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ReferenceHoldingMock);
-};
-
-// Tests that EXPECT_CALL and ON_CALL compile in a presence of macro
-// redefining a mock method name. This could happen, for example, when
-// the tested code #includes Win32 API headers which define many APIs
-// as macros, e.g. #define TextOut TextOutW.
-
-#define Method MethodW
-
-class CC {
- public:
-  virtual ~CC() {}
-  virtual int Method() = 0;
-};
-class MockCC : public CC {
- public:
-  MockCC() {}
-
-  MOCK_METHOD0(Method, int());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockCC);
-};
-
-// Tests that a method with expanded name compiles.
-TEST(OnCallSyntaxTest, CompilesWithMethodNameExpandedFromMacro) {
-  MockCC cc;
-  ON_CALL(cc, Method());
-}
-
-// Tests that the method with expanded name not only compiles but runs
-// and returns a correct value, too.
-TEST(OnCallSyntaxTest, WorksWithMethodNameExpandedFromMacro) {
-  MockCC cc;
-  ON_CALL(cc, Method()).WillByDefault(Return(42));
-  EXPECT_EQ(42, cc.Method());
-}
-
-// Tests that a method with expanded name compiles.
-TEST(ExpectCallSyntaxTest, CompilesWithMethodNameExpandedFromMacro) {
-  MockCC cc;
-  EXPECT_CALL(cc, Method());
-  cc.Method();
-}
-
-// Tests that it works, too.
-TEST(ExpectCallSyntaxTest, WorksWithMethodNameExpandedFromMacro) {
-  MockCC cc;
-  EXPECT_CALL(cc, Method()).WillOnce(Return(42));
-  EXPECT_EQ(42, cc.Method());
-}
-
-#undef Method  // Done with macro redefinition tests.
-
-// Tests that ON_CALL evaluates its arguments exactly once as promised
-// by Google Mock.
-TEST(OnCallSyntaxTest, EvaluatesFirstArgumentOnce) {
-  MockA a;
-  MockA* pa = &a;
-
-  ON_CALL(*pa++, DoA(_));
-  EXPECT_EQ(&a + 1, pa);
-}
-
-TEST(OnCallSyntaxTest, EvaluatesSecondArgumentOnce) {
-  MockA a;
-  int n = 0;
-
-  ON_CALL(a, DoA(n++));
-  EXPECT_EQ(1, n);
-}
-
-// Tests that the syntax of ON_CALL() is enforced at run time.
-
-TEST(OnCallSyntaxTest, WithIsOptional) {
-  MockA a;
-
-  ON_CALL(a, DoA(5))
-      .WillByDefault(Return());
-  ON_CALL(a, DoA(_))
-      .With(_)
-      .WillByDefault(Return());
-}
-
-TEST(OnCallSyntaxTest, WithCanAppearAtMostOnce) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    ON_CALL(a, ReturnResult(_))
-        .With(_)
-        .With(_)
-        .WillByDefault(Return(Result()));
-  }, ".With() cannot appear more than once in an ON_CALL()");
-}
-
-TEST(OnCallSyntaxTest, WillByDefaultIsMandatory) {
-  MockA a;
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    ON_CALL(a, DoA(5));
-    a.DoA(5);
-  }, "");
-}
-
-TEST(OnCallSyntaxTest, WillByDefaultCanAppearAtMostOnce) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    ON_CALL(a, DoA(5))
-        .WillByDefault(Return())
-        .WillByDefault(Return());
-  }, ".WillByDefault() must appear exactly once in an ON_CALL()");
-}
-
-// Tests that EXPECT_CALL evaluates its arguments exactly once as
-// promised by Google Mock.
-TEST(ExpectCallSyntaxTest, EvaluatesFirstArgumentOnce) {
-  MockA a;
-  MockA* pa = &a;
-
-  EXPECT_CALL(*pa++, DoA(_));
-  a.DoA(0);
-  EXPECT_EQ(&a + 1, pa);
-}
-
-TEST(ExpectCallSyntaxTest, EvaluatesSecondArgumentOnce) {
-  MockA a;
-  int n = 0;
-
-  EXPECT_CALL(a, DoA(n++));
-  a.DoA(0);
-  EXPECT_EQ(1, n);
-}
-
-// Tests that the syntax of EXPECT_CALL() is enforced at run time.
-
-TEST(ExpectCallSyntaxTest, WithIsOptional) {
-  MockA a;
-
-  EXPECT_CALL(a, DoA(5))
-      .Times(0);
-  EXPECT_CALL(a, DoA(6))
-      .With(_)
-      .Times(0);
-}
-
-TEST(ExpectCallSyntaxTest, WithCanAppearAtMostOnce) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(6))
-        .With(_)
-        .With(_);
-  }, ".With() cannot appear more than once in an EXPECT_CALL()");
-
-  a.DoA(6);
-}
-
-TEST(ExpectCallSyntaxTest, WithMustBeFirstClause) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .Times(1)
-        .With(_);
-  }, ".With() must be the first clause in an EXPECT_CALL()");
-
-  a.DoA(1);
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(2))
-        .WillOnce(Return())
-        .With(_);
-  }, ".With() must be the first clause in an EXPECT_CALL()");
-
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, TimesCanBeInferred) {
-  MockA a;
-
-  EXPECT_CALL(a, DoA(1))
-      .WillOnce(Return());
-
-  EXPECT_CALL(a, DoA(2))
-      .WillOnce(Return())
-      .WillRepeatedly(Return());
-
-  a.DoA(1);
-  a.DoA(2);
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, TimesCanAppearAtMostOnce) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .Times(1)
-        .Times(2);
-  }, ".Times() cannot appear more than once in an EXPECT_CALL()");
-
-  a.DoA(1);
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, TimesMustBeBeforeInSequence) {
-  MockA a;
-  Sequence s;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .InSequence(s)
-        .Times(1);
-  }, ".Times() cannot appear after ");
-
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, InSequenceIsOptional) {
-  MockA a;
-  Sequence s;
-
-  EXPECT_CALL(a, DoA(1));
-  EXPECT_CALL(a, DoA(2))
-      .InSequence(s);
-
-  a.DoA(1);
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, InSequenceCanAppearMultipleTimes) {
-  MockA a;
-  Sequence s1, s2;
-
-  EXPECT_CALL(a, DoA(1))
-      .InSequence(s1, s2)
-      .InSequence(s1);
-
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, InSequenceMustBeBeforeAfter) {
-  MockA a;
-  Sequence s;
-
-  Expectation e = EXPECT_CALL(a, DoA(1))
-      .Times(AnyNumber());
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(2))
-        .After(e)
-        .InSequence(s);
-  }, ".InSequence() cannot appear after ");
-
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, InSequenceMustBeBeforeWillOnce) {
-  MockA a;
-  Sequence s;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .WillOnce(Return())
-        .InSequence(s);
-  }, ".InSequence() cannot appear after ");
-
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, AfterMustBeBeforeWillOnce) {
-  MockA a;
-
-  Expectation e = EXPECT_CALL(a, DoA(1));
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_CALL(a, DoA(2))
-        .WillOnce(Return())
-        .After(e);
-  }, ".After() cannot appear after ");
-
-  a.DoA(1);
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, WillIsOptional) {
-  MockA a;
-
-  EXPECT_CALL(a, DoA(1));
-  EXPECT_CALL(a, DoA(2))
-      .WillOnce(Return());
-
-  a.DoA(1);
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, WillCanAppearMultipleTimes) {
-  MockA a;
-
-  EXPECT_CALL(a, DoA(1))
-      .Times(AnyNumber())
-      .WillOnce(Return())
-      .WillOnce(Return())
-      .WillOnce(Return());
-}
-
-TEST(ExpectCallSyntaxTest, WillMustBeBeforeWillRepeatedly) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .WillRepeatedly(Return())
-        .WillOnce(Return());
-  }, ".WillOnce() cannot appear after ");
-
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, WillRepeatedlyIsOptional) {
-  MockA a;
-
-  EXPECT_CALL(a, DoA(1))
-      .WillOnce(Return());
-  EXPECT_CALL(a, DoA(2))
-      .WillOnce(Return())
-      .WillRepeatedly(Return());
-
-  a.DoA(1);
-  a.DoA(2);
-  a.DoA(2);
-}
-
-TEST(ExpectCallSyntaxTest, WillRepeatedlyCannotAppearMultipleTimes) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .WillRepeatedly(Return())
-        .WillRepeatedly(Return());
-  }, ".WillRepeatedly() cannot appear more than once in an "
-     "EXPECT_CALL()");
-}
-
-TEST(ExpectCallSyntaxTest, WillRepeatedlyMustBeBeforeRetiresOnSaturation) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .RetiresOnSaturation()
-        .WillRepeatedly(Return());
-  }, ".WillRepeatedly() cannot appear after ");
-}
-
-TEST(ExpectCallSyntaxTest, RetiresOnSaturationIsOptional) {
-  MockA a;
-
-  EXPECT_CALL(a, DoA(1));
-  EXPECT_CALL(a, DoA(1))
-      .RetiresOnSaturation();
-
-  a.DoA(1);
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, RetiresOnSaturationCannotAppearMultipleTimes) {
-  MockA a;
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_CALL(a, DoA(1))
-        .RetiresOnSaturation()
-        .RetiresOnSaturation();
-  }, ".RetiresOnSaturation() cannot appear more than once");
-
-  a.DoA(1);
-}
-
-TEST(ExpectCallSyntaxTest, DefaultCardinalityIsOnce) {
-  {
-    MockA a;
-    EXPECT_CALL(a, DoA(1));
-    a.DoA(1);
-  }
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    MockA a;
-    EXPECT_CALL(a, DoA(1));
-  }, "to be called once");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    MockA a;
-    EXPECT_CALL(a, DoA(1));
-    a.DoA(1);
-    a.DoA(1);
-  }, "to be called once");
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that Google Mock doesn't print a warning when the number of
-// WillOnce() is adequate.
-TEST(ExpectCallSyntaxTest, DoesNotWarnOnAdequateActionCount) {
-  CaptureStdout();
-  {
-    MockB b;
-
-    // It's always fine to omit WillOnce() entirely.
-    EXPECT_CALL(b, DoB())
-        .Times(0);
-    EXPECT_CALL(b, DoB(1))
-        .Times(AtMost(1));
-    EXPECT_CALL(b, DoB(2))
-        .Times(1)
-        .WillRepeatedly(Return(1));
-
-    // It's fine for the number of WillOnce()s to equal the upper bound.
-    EXPECT_CALL(b, DoB(3))
-        .Times(Between(1, 2))
-        .WillOnce(Return(1))
-        .WillOnce(Return(2));
-
-    // It's fine for the number of WillOnce()s to be smaller than the
-    // upper bound when there is a WillRepeatedly().
-    EXPECT_CALL(b, DoB(4))
-        .Times(AtMost(3))
-        .WillOnce(Return(1))
-        .WillRepeatedly(Return(2));
-
-    // Satisfies the above expectations.
-    b.DoB(2);
-    b.DoB(3);
-  }
-  EXPECT_STREQ("", GetCapturedStdout().c_str());
-}
-
-// Tests that Google Mock warns on having too many actions in an
-// expectation compared to its cardinality.
-TEST(ExpectCallSyntaxTest, WarnsOnTooManyActions) {
-  CaptureStdout();
-  {
-    MockB b;
-
-    // Warns when the number of WillOnce()s is larger than the upper bound.
-    EXPECT_CALL(b, DoB())
-        .Times(0)
-        .WillOnce(Return(1));  // #1
-    EXPECT_CALL(b, DoB())
-        .Times(AtMost(1))
-        .WillOnce(Return(1))
-        .WillOnce(Return(2));  // #2
-    EXPECT_CALL(b, DoB(1))
-        .Times(1)
-        .WillOnce(Return(1))
-        .WillOnce(Return(2))
-        .RetiresOnSaturation();  // #3
-
-    // Warns when the number of WillOnce()s equals the upper bound and
-    // there is a WillRepeatedly().
-    EXPECT_CALL(b, DoB())
-        .Times(0)
-        .WillRepeatedly(Return(1));  // #4
-    EXPECT_CALL(b, DoB(2))
-        .Times(1)
-        .WillOnce(Return(1))
-        .WillRepeatedly(Return(2));  // #5
-
-    // Satisfies the above expectations.
-    b.DoB(1);
-    b.DoB(2);
-  }
-  const std::string output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Too many actions specified in EXPECT_CALL(b, DoB())...\n"
-      "Expected to be never called, but has 1 WillOnce().",
-      output);  // #1
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Too many actions specified in EXPECT_CALL(b, DoB())...\n"
-      "Expected to be called at most once, "
-      "but has 2 WillOnce()s.",
-      output);  // #2
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Too many actions specified in EXPECT_CALL(b, DoB(1))...\n"
-      "Expected to be called once, but has 2 WillOnce()s.",
-      output);  // #3
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Too many actions specified in EXPECT_CALL(b, DoB())...\n"
-      "Expected to be never called, but has 0 WillOnce()s "
-      "and a WillRepeatedly().",
-      output);  // #4
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Too many actions specified in EXPECT_CALL(b, DoB(2))...\n"
-      "Expected to be called once, but has 1 WillOnce() "
-      "and a WillRepeatedly().",
-      output);  // #5
-}
-
-// Tests that Google Mock warns on having too few actions in an
-// expectation compared to its cardinality.
-TEST(ExpectCallSyntaxTest, WarnsOnTooFewActions) {
-  MockB b;
-
-  EXPECT_CALL(b, DoB())
-      .Times(Between(2, 3))
-      .WillOnce(Return(1));
-
-  CaptureStdout();
-  b.DoB();
-  const std::string output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Too few actions specified in EXPECT_CALL(b, DoB())...\n"
-      "Expected to be called between 2 and 3 times, "
-      "but has only 1 WillOnce().",
-      output);
-  b.DoB();
-}
-
-TEST(ExpectCallSyntaxTest, WarningIsErrorWithFlag) {
-  int original_behavior = testing::GMOCK_FLAG(default_mock_behavior);
-
-  testing::GMOCK_FLAG(default_mock_behavior) = kAllow;
-  CaptureStdout();
-  {
-    MockA a;
-    a.DoA(0);
-  }
-  std::string output = GetCapturedStdout();
-  EXPECT_TRUE(output.empty()) << output;
-
-  testing::GMOCK_FLAG(default_mock_behavior) = kWarn;
-  CaptureStdout();
-  {
-    MockA a;
-    a.DoA(0);
-  }
-  std::string warning_output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(IsSubstring, "GMOCK WARNING", warning_output);
-  EXPECT_PRED_FORMAT2(IsSubstring, "Uninteresting mock function call",
-                      warning_output);
-
-  testing::GMOCK_FLAG(default_mock_behavior) = kFail;
-  EXPECT_NONFATAL_FAILURE({
-    MockA a;
-    a.DoA(0);
-  }, "Uninteresting mock function call");
-
-  // Out of bounds values are converted to kWarn
-  testing::GMOCK_FLAG(default_mock_behavior) = -1;
-  CaptureStdout();
-  {
-    MockA a;
-    a.DoA(0);
-  }
-  warning_output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(IsSubstring, "GMOCK WARNING", warning_output);
-  EXPECT_PRED_FORMAT2(IsSubstring, "Uninteresting mock function call",
-                      warning_output);
-  testing::GMOCK_FLAG(default_mock_behavior) = 3;
-  CaptureStdout();
-  {
-    MockA a;
-    a.DoA(0);
-  }
-  warning_output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(IsSubstring, "GMOCK WARNING", warning_output);
-  EXPECT_PRED_FORMAT2(IsSubstring, "Uninteresting mock function call",
-                      warning_output);
-
-  testing::GMOCK_FLAG(default_mock_behavior) = original_behavior;
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Tests the semantics of ON_CALL().
-
-// Tests that the built-in default action is taken when no ON_CALL()
-// is specified.
-TEST(OnCallTest, TakesBuiltInDefaultActionWhenNoOnCall) {
-  MockB b;
-  EXPECT_CALL(b, DoB());
-
-  EXPECT_EQ(0, b.DoB());
-}
-
-// Tests that the built-in default action is taken when no ON_CALL()
-// matches the invocation.
-TEST(OnCallTest, TakesBuiltInDefaultActionWhenNoOnCallMatches) {
-  MockB b;
-  ON_CALL(b, DoB(1))
-      .WillByDefault(Return(1));
-  EXPECT_CALL(b, DoB(_));
-
-  EXPECT_EQ(0, b.DoB(2));
-}
-
-// Tests that the last matching ON_CALL() action is taken.
-TEST(OnCallTest, PicksLastMatchingOnCall) {
-  MockB b;
-  ON_CALL(b, DoB(_))
-      .WillByDefault(Return(3));
-  ON_CALL(b, DoB(2))
-      .WillByDefault(Return(2));
-  ON_CALL(b, DoB(1))
-      .WillByDefault(Return(1));
-  EXPECT_CALL(b, DoB(_));
-
-  EXPECT_EQ(2, b.DoB(2));
-}
-
-// Tests the semantics of EXPECT_CALL().
-
-// Tests that any call is allowed when no EXPECT_CALL() is specified.
-TEST(ExpectCallTest, AllowsAnyCallWhenNoSpec) {
-  MockB b;
-  EXPECT_CALL(b, DoB());
-  // There is no expectation on DoB(int).
-
-  b.DoB();
-
-  // DoB(int) can be called any number of times.
-  b.DoB(1);
-  b.DoB(2);
-}
-
-// Tests that the last matching EXPECT_CALL() fires.
-TEST(ExpectCallTest, PicksLastMatchingExpectCall) {
-  MockB b;
-  EXPECT_CALL(b, DoB(_))
-      .WillRepeatedly(Return(2));
-  EXPECT_CALL(b, DoB(1))
-      .WillRepeatedly(Return(1));
-
-  EXPECT_EQ(1, b.DoB(1));
-}
-
-// Tests lower-bound violation.
-TEST(ExpectCallTest, CatchesTooFewCalls) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    MockB b;
-    EXPECT_CALL(b, DoB(5))
-        .Times(AtLeast(2));
-
-    b.DoB(5);
-  }, "Actual function call count doesn't match EXPECT_CALL(b, DoB(5))...\n"
-     "         Expected: to be called at least twice\n"
-     "           Actual: called once - unsatisfied and active");
-}
-
-// Tests that the cardinality can be inferred when no Times(...) is
-// specified.
-TEST(ExpectCallTest, InfersCardinalityWhenThereIsNoWillRepeatedly) {
-  {
-    MockB b;
-    EXPECT_CALL(b, DoB())
-        .WillOnce(Return(1))
-        .WillOnce(Return(2));
-
-    EXPECT_EQ(1, b.DoB());
-    EXPECT_EQ(2, b.DoB());
-  }
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    MockB b;
-    EXPECT_CALL(b, DoB())
-        .WillOnce(Return(1))
-        .WillOnce(Return(2));
-
-    EXPECT_EQ(1, b.DoB());
-  }, "to be called twice");
-
-  {  // NOLINT
-    MockB b;
-    EXPECT_CALL(b, DoB())
-        .WillOnce(Return(1))
-        .WillOnce(Return(2));
-
-    EXPECT_EQ(1, b.DoB());
-    EXPECT_EQ(2, b.DoB());
-    EXPECT_NONFATAL_FAILURE(b.DoB(), "to be called twice");
-  }
-}
-
-TEST(ExpectCallTest, InfersCardinality1WhenThereIsWillRepeatedly) {
-  {
-    MockB b;
-    EXPECT_CALL(b, DoB())
-        .WillOnce(Return(1))
-        .WillRepeatedly(Return(2));
-
-    EXPECT_EQ(1, b.DoB());
-  }
-
-  {  // NOLINT
-    MockB b;
-    EXPECT_CALL(b, DoB())
-        .WillOnce(Return(1))
-        .WillRepeatedly(Return(2));
-
-    EXPECT_EQ(1, b.DoB());
-    EXPECT_EQ(2, b.DoB());
-    EXPECT_EQ(2, b.DoB());
-  }
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    MockB b;
-    EXPECT_CALL(b, DoB())
-        .WillOnce(Return(1))
-        .WillRepeatedly(Return(2));
-  }, "to be called at least once");
-}
-
-// Tests that the n-th action is taken for the n-th matching
-// invocation.
-TEST(ExpectCallTest, NthMatchTakesNthAction) {
-  MockB b;
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(1))
-      .WillOnce(Return(2))
-      .WillOnce(Return(3));
-
-  EXPECT_EQ(1, b.DoB());
-  EXPECT_EQ(2, b.DoB());
-  EXPECT_EQ(3, b.DoB());
-}
-
-// Tests that the WillRepeatedly() action is taken when the WillOnce(...)
-// list is exhausted.
-TEST(ExpectCallTest, TakesRepeatedActionWhenWillListIsExhausted) {
-  MockB b;
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(1))
-      .WillRepeatedly(Return(2));
-
-  EXPECT_EQ(1, b.DoB());
-  EXPECT_EQ(2, b.DoB());
-  EXPECT_EQ(2, b.DoB());
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that the default action is taken when the WillOnce(...) list is
-// exhausted and there is no WillRepeatedly().
-TEST(ExpectCallTest, TakesDefaultActionWhenWillListIsExhausted) {
-  MockB b;
-  EXPECT_CALL(b, DoB(_))
-      .Times(1);
-  EXPECT_CALL(b, DoB())
-      .Times(AnyNumber())
-      .WillOnce(Return(1))
-      .WillOnce(Return(2));
-
-  CaptureStdout();
-  EXPECT_EQ(0, b.DoB(1));  // Shouldn't generate a warning as the
-                           // expectation has no action clause at all.
-  EXPECT_EQ(1, b.DoB());
-  EXPECT_EQ(2, b.DoB());
-  const std::string output1 = GetCapturedStdout();
-  EXPECT_STREQ("", output1.c_str());
-
-  CaptureStdout();
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB());
-  const std::string output2 = GetCapturedStdout();
-  EXPECT_THAT(output2.c_str(),
-              HasSubstr("Actions ran out in EXPECT_CALL(b, DoB())...\n"
-                        "Called 3 times, but only 2 WillOnce()s are specified"
-                        " - returning default value."));
-  EXPECT_THAT(output2.c_str(),
-              HasSubstr("Actions ran out in EXPECT_CALL(b, DoB())...\n"
-                        "Called 4 times, but only 2 WillOnce()s are specified"
-                        " - returning default value."));
-}
-
-TEST(FunctionMockerMessageTest, ReportsExpectCallLocationForExhausedActions) {
-  MockB b;
-  std::string expect_call_location = FormatFileLocation(__FILE__, __LINE__ + 1);
-  EXPECT_CALL(b, DoB()).Times(AnyNumber()).WillOnce(Return(1));
-
-  EXPECT_EQ(1, b.DoB());
-
-  CaptureStdout();
-  EXPECT_EQ(0, b.DoB());
-  const std::string output = GetCapturedStdout();
-  // The warning message should contain the call location.
-  EXPECT_PRED_FORMAT2(IsSubstring, expect_call_location, output);
-}
-
-TEST(FunctionMockerMessageTest,
-     ReportsDefaultActionLocationOfUninterestingCallsForNaggyMock) {
-  std::string on_call_location;
-  CaptureStdout();
-  {
-    NaggyMock<MockB> b;
-    on_call_location = FormatFileLocation(__FILE__, __LINE__ + 1);
-    ON_CALL(b, DoB(_)).WillByDefault(Return(0));
-    b.DoB(0);
-  }
-  EXPECT_PRED_FORMAT2(IsSubstring, on_call_location, GetCapturedStdout());
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that an uninteresting call performs the default action.
-TEST(UninterestingCallTest, DoesDefaultAction) {
-  // When there is an ON_CALL() statement, the action specified by it
-  // should be taken.
-  MockA a;
-  ON_CALL(a, Binary(_, _))
-      .WillByDefault(Return(true));
-  EXPECT_TRUE(a.Binary(1, 2));
-
-  // When there is no ON_CALL(), the default value for the return type
-  // should be returned.
-  MockB b;
-  EXPECT_EQ(0, b.DoB());
-}
-
-// Tests that an unexpected call performs the default action.
-TEST(UnexpectedCallTest, DoesDefaultAction) {
-  // When there is an ON_CALL() statement, the action specified by it
-  // should be taken.
-  MockA a;
-  ON_CALL(a, Binary(_, _))
-      .WillByDefault(Return(true));
-  EXPECT_CALL(a, Binary(0, 0));
-  a.Binary(0, 0);
-  bool result = false;
-  EXPECT_NONFATAL_FAILURE(result = a.Binary(1, 2),
-                          "Unexpected mock function call");
-  EXPECT_TRUE(result);
-
-  // When there is no ON_CALL(), the default value for the return type
-  // should be returned.
-  MockB b;
-  EXPECT_CALL(b, DoB(0))
-      .Times(0);
-  int n = -1;
-  EXPECT_NONFATAL_FAILURE(n = b.DoB(1),
-                          "Unexpected mock function call");
-  EXPECT_EQ(0, n);
-}
-
-// Tests that when an unexpected void function generates the right
-// failure message.
-TEST(UnexpectedCallTest, GeneratesFailureForVoidFunction) {
-  // First, tests the message when there is only one EXPECT_CALL().
-  MockA a1;
-  EXPECT_CALL(a1, DoA(1));
-  a1.DoA(1);
-  // Ideally we should match the failure message against a regex, but
-  // EXPECT_NONFATAL_FAILURE doesn't support that, so we test for
-  // multiple sub-strings instead.
-  EXPECT_NONFATAL_FAILURE(
-      a1.DoA(9),
-      "Unexpected mock function call - returning directly.\n"
-      "    Function call: DoA(9)\n"
-      "Google Mock tried the following 1 expectation, but it didn't match:");
-  EXPECT_NONFATAL_FAILURE(
-      a1.DoA(9),
-      "  Expected arg #0: is equal to 1\n"
-      "           Actual: 9\n"
-      "         Expected: to be called once\n"
-      "           Actual: called once - saturated and active");
-
-  // Next, tests the message when there are more than one EXPECT_CALL().
-  MockA a2;
-  EXPECT_CALL(a2, DoA(1));
-  EXPECT_CALL(a2, DoA(3));
-  a2.DoA(1);
-  EXPECT_NONFATAL_FAILURE(
-      a2.DoA(2),
-      "Unexpected mock function call - returning directly.\n"
-      "    Function call: DoA(2)\n"
-      "Google Mock tried the following 2 expectations, but none matched:");
-  EXPECT_NONFATAL_FAILURE(
-      a2.DoA(2),
-      "tried expectation #0: EXPECT_CALL(a2, DoA(1))...\n"
-      "  Expected arg #0: is equal to 1\n"
-      "           Actual: 2\n"
-      "         Expected: to be called once\n"
-      "           Actual: called once - saturated and active");
-  EXPECT_NONFATAL_FAILURE(
-      a2.DoA(2),
-      "tried expectation #1: EXPECT_CALL(a2, DoA(3))...\n"
-      "  Expected arg #0: is equal to 3\n"
-      "           Actual: 2\n"
-      "         Expected: to be called once\n"
-      "           Actual: never called - unsatisfied and active");
-  a2.DoA(3);
-}
-
-// Tests that an unexpected non-void function generates the right
-// failure message.
-TEST(UnexpectedCallTest, GeneartesFailureForNonVoidFunction) {
-  MockB b1;
-  EXPECT_CALL(b1, DoB(1));
-  b1.DoB(1);
-  EXPECT_NONFATAL_FAILURE(
-      b1.DoB(2),
-      "Unexpected mock function call - returning default value.\n"
-      "    Function call: DoB(2)\n"
-      "          Returns: 0\n"
-      "Google Mock tried the following 1 expectation, but it didn't match:");
-  EXPECT_NONFATAL_FAILURE(
-      b1.DoB(2),
-      "  Expected arg #0: is equal to 1\n"
-      "           Actual: 2\n"
-      "         Expected: to be called once\n"
-      "           Actual: called once - saturated and active");
-}
-
-// Tests that Google Mock explains that an retired expectation doesn't
-// match the call.
-TEST(UnexpectedCallTest, RetiredExpectation) {
-  MockB b;
-  EXPECT_CALL(b, DoB(1))
-      .RetiresOnSaturation();
-
-  b.DoB(1);
-  EXPECT_NONFATAL_FAILURE(
-      b.DoB(1),
-      "         Expected: the expectation is active\n"
-      "           Actual: it is retired");
-}
-
-// Tests that Google Mock explains that an expectation that doesn't
-// match the arguments doesn't match the call.
-TEST(UnexpectedCallTest, UnmatchedArguments) {
-  MockB b;
-  EXPECT_CALL(b, DoB(1));
-
-  EXPECT_NONFATAL_FAILURE(
-      b.DoB(2),
-      "  Expected arg #0: is equal to 1\n"
-      "           Actual: 2\n");
-  b.DoB(1);
-}
-
-// Tests that Google Mock explains that an expectation with
-// unsatisfied pre-requisites doesn't match the call.
-TEST(UnexpectedCallTest, UnsatisifiedPrerequisites) {
-  Sequence s1, s2;
-  MockB b;
-  EXPECT_CALL(b, DoB(1))
-      .InSequence(s1);
-  EXPECT_CALL(b, DoB(2))
-      .Times(AnyNumber())
-      .InSequence(s1);
-  EXPECT_CALL(b, DoB(3))
-      .InSequence(s2);
-  EXPECT_CALL(b, DoB(4))
-      .InSequence(s1, s2);
-
-  ::testing::TestPartResultArray failures;
-  {
-    ::testing::ScopedFakeTestPartResultReporter reporter(&failures);
-    b.DoB(4);
-    // Now 'failures' contains the Google Test failures generated by
-    // the above statement.
-  }
-
-  // There should be one non-fatal failure.
-  ASSERT_EQ(1, failures.size());
-  const ::testing::TestPartResult& r = failures.GetTestPartResult(0);
-  EXPECT_EQ(::testing::TestPartResult::kNonFatalFailure, r.type());
-
-  // Verifies that the failure message contains the two unsatisfied
-  // pre-requisites but not the satisfied one.
-#if GTEST_USES_PCRE
-  EXPECT_THAT(r.message(), ContainsRegex(
-      // PCRE has trouble using (.|\n) to match any character, but
-      // supports the (?s) prefix for using . to match any character.
-      "(?s)the following immediate pre-requisites are not satisfied:\n"
-      ".*: pre-requisite #0\n"
-      ".*: pre-requisite #1"));
-#elif GTEST_USES_POSIX_RE
-  EXPECT_THAT(r.message(), ContainsRegex(
-      // POSIX RE doesn't understand the (?s) prefix, but has no trouble
-      // with (.|\n).
-      "the following immediate pre-requisites are not satisfied:\n"
-      "(.|\n)*: pre-requisite #0\n"
-      "(.|\n)*: pre-requisite #1"));
-#else
-  // We can only use Google Test's own simple regex.
-  EXPECT_THAT(r.message(), ContainsRegex(
-      "the following immediate pre-requisites are not satisfied:"));
-  EXPECT_THAT(r.message(), ContainsRegex(": pre-requisite #0"));
-  EXPECT_THAT(r.message(), ContainsRegex(": pre-requisite #1"));
-#endif  // GTEST_USES_PCRE
-
-  b.DoB(1);
-  b.DoB(3);
-  b.DoB(4);
-}
-
-TEST(UndefinedReturnValueTest,
-     ReturnValueIsMandatoryWhenNotDefaultConstructible) {
-  MockA a;
-  // FIXME: We should really verify the output message,
-  // but we cannot yet due to that EXPECT_DEATH only captures stderr
-  // while Google Mock logs to stdout.
-#if GTEST_HAS_EXCEPTIONS
-  EXPECT_ANY_THROW(a.ReturnNonDefaultConstructible());
-#else
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnNonDefaultConstructible(), "");
-#endif
-}
-
-// Tests that an excessive call (one whose arguments match the
-// matchers but is called too many times) performs the default action.
-TEST(ExcessiveCallTest, DoesDefaultAction) {
-  // When there is an ON_CALL() statement, the action specified by it
-  // should be taken.
-  MockA a;
-  ON_CALL(a, Binary(_, _))
-      .WillByDefault(Return(true));
-  EXPECT_CALL(a, Binary(0, 0));
-  a.Binary(0, 0);
-  bool result = false;
-  EXPECT_NONFATAL_FAILURE(result = a.Binary(0, 0),
-                          "Mock function called more times than expected");
-  EXPECT_TRUE(result);
-
-  // When there is no ON_CALL(), the default value for the return type
-  // should be returned.
-  MockB b;
-  EXPECT_CALL(b, DoB(0))
-      .Times(0);
-  int n = -1;
-  EXPECT_NONFATAL_FAILURE(n = b.DoB(0),
-                          "Mock function called more times than expected");
-  EXPECT_EQ(0, n);
-}
-
-// Tests that when a void function is called too many times,
-// the failure message contains the argument values.
-TEST(ExcessiveCallTest, GeneratesFailureForVoidFunction) {
-  MockA a;
-  EXPECT_CALL(a, DoA(_))
-      .Times(0);
-  EXPECT_NONFATAL_FAILURE(
-      a.DoA(9),
-      "Mock function called more times than expected - returning directly.\n"
-      "    Function call: DoA(9)\n"
-      "         Expected: to be never called\n"
-      "           Actual: called once - over-saturated and active");
-}
-
-// Tests that when a non-void function is called too many times, the
-// failure message contains the argument values and the return value.
-TEST(ExcessiveCallTest, GeneratesFailureForNonVoidFunction) {
-  MockB b;
-  EXPECT_CALL(b, DoB(_));
-  b.DoB(1);
-  EXPECT_NONFATAL_FAILURE(
-      b.DoB(2),
-      "Mock function called more times than expected - "
-      "returning default value.\n"
-      "    Function call: DoB(2)\n"
-      "          Returns: 0\n"
-      "         Expected: to be called once\n"
-      "           Actual: called twice - over-saturated and active");
-}
-
-// Tests using sequences.
-
-TEST(InSequenceTest, AllExpectationInScopeAreInSequence) {
-  MockA a;
-  {
-    InSequence dummy;
-
-    EXPECT_CALL(a, DoA(1));
-    EXPECT_CALL(a, DoA(2));
-  }
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    a.DoA(2);
-  }, "Unexpected mock function call");
-
-  a.DoA(1);
-  a.DoA(2);
-}
-
-TEST(InSequenceTest, NestedInSequence) {
-  MockA a;
-  {
-    InSequence dummy;
-
-    EXPECT_CALL(a, DoA(1));
-    {
-      InSequence dummy2;
-
-      EXPECT_CALL(a, DoA(2));
-      EXPECT_CALL(a, DoA(3));
-    }
-  }
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    a.DoA(1);
-    a.DoA(3);
-  }, "Unexpected mock function call");
-
-  a.DoA(2);
-  a.DoA(3);
-}
-
-TEST(InSequenceTest, ExpectationsOutOfScopeAreNotAffected) {
-  MockA a;
-  {
-    InSequence dummy;
-
-    EXPECT_CALL(a, DoA(1));
-    EXPECT_CALL(a, DoA(2));
-  }
-  EXPECT_CALL(a, DoA(3));
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    a.DoA(2);
-  }, "Unexpected mock function call");
-
-  a.DoA(3);
-  a.DoA(1);
-  a.DoA(2);
-}
-
-// Tests that any order is allowed when no sequence is used.
-TEST(SequenceTest, AnyOrderIsOkByDefault) {
-  {
-    MockA a;
-    MockB b;
-
-    EXPECT_CALL(a, DoA(1));
-    EXPECT_CALL(b, DoB())
-        .Times(AnyNumber());
-
-    a.DoA(1);
-    b.DoB();
-  }
-
-  {  // NOLINT
-    MockA a;
-    MockB b;
-
-    EXPECT_CALL(a, DoA(1));
-    EXPECT_CALL(b, DoB())
-        .Times(AnyNumber());
-
-    b.DoB();
-    a.DoA(1);
-  }
-}
-
-// Tests that the calls must be in strict order when a complete order
-// is specified.
-TEST(SequenceTest, CallsMustBeInStrictOrderWhenSaidSo1) {
-  MockA a;
-  ON_CALL(a, ReturnResult(_))
-      .WillByDefault(Return(Result()));
-
-  Sequence s;
-  EXPECT_CALL(a, ReturnResult(1))
-      .InSequence(s);
-  EXPECT_CALL(a, ReturnResult(2))
-      .InSequence(s);
-  EXPECT_CALL(a, ReturnResult(3))
-      .InSequence(s);
-
-  a.ReturnResult(1);
-
-  // May only be called after a.ReturnResult(2).
-  EXPECT_NONFATAL_FAILURE(a.ReturnResult(3), "Unexpected mock function call");
-
-  a.ReturnResult(2);
-  a.ReturnResult(3);
-}
-
-// Tests that the calls must be in strict order when a complete order
-// is specified.
-TEST(SequenceTest, CallsMustBeInStrictOrderWhenSaidSo2) {
-  MockA a;
-  ON_CALL(a, ReturnResult(_))
-      .WillByDefault(Return(Result()));
-
-  Sequence s;
-  EXPECT_CALL(a, ReturnResult(1))
-      .InSequence(s);
-  EXPECT_CALL(a, ReturnResult(2))
-      .InSequence(s);
-
-  // May only be called after a.ReturnResult(1).
-  EXPECT_NONFATAL_FAILURE(a.ReturnResult(2), "Unexpected mock function call");
-
-  a.ReturnResult(1);
-  a.ReturnResult(2);
-}
-
-// Tests specifying a DAG using multiple sequences.
-class PartialOrderTest : public testing::Test {
- protected:
-  PartialOrderTest() {
-    ON_CALL(a_, ReturnResult(_))
-        .WillByDefault(Return(Result()));
-
-    // Specifies this partial ordering:
-    //
-    // a.ReturnResult(1) ==>
-    //                       a.ReturnResult(2) * n  ==>  a.ReturnResult(3)
-    // b.DoB() * 2       ==>
-    Sequence x, y;
-    EXPECT_CALL(a_, ReturnResult(1))
-        .InSequence(x);
-    EXPECT_CALL(b_, DoB())
-        .Times(2)
-        .InSequence(y);
-    EXPECT_CALL(a_, ReturnResult(2))
-        .Times(AnyNumber())
-        .InSequence(x, y);
-    EXPECT_CALL(a_, ReturnResult(3))
-        .InSequence(x);
-  }
-
-  MockA a_;
-  MockB b_;
-};
-
-TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag1) {
-  a_.ReturnResult(1);
-  b_.DoB();
-
-  // May only be called after the second DoB().
-  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(2), "Unexpected mock function call");
-
-  b_.DoB();
-  a_.ReturnResult(3);
-}
-
-TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag2) {
-  // May only be called after ReturnResult(1).
-  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(2), "Unexpected mock function call");
-
-  a_.ReturnResult(1);
-  b_.DoB();
-  b_.DoB();
-  a_.ReturnResult(3);
-}
-
-TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag3) {
-  // May only be called last.
-  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(3), "Unexpected mock function call");
-
-  a_.ReturnResult(1);
-  b_.DoB();
-  b_.DoB();
-  a_.ReturnResult(3);
-}
-
-TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag4) {
-  a_.ReturnResult(1);
-  b_.DoB();
-  b_.DoB();
-  a_.ReturnResult(3);
-
-  // May only be called before ReturnResult(3).
-  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(2), "Unexpected mock function call");
-}
-
-TEST(SequenceTest, Retirement) {
-  MockA a;
-  Sequence s;
-
-  EXPECT_CALL(a, DoA(1))
-      .InSequence(s);
-  EXPECT_CALL(a, DoA(_))
-      .InSequence(s)
-      .RetiresOnSaturation();
-  EXPECT_CALL(a, DoA(1))
-      .InSequence(s);
-
-  a.DoA(1);
-  a.DoA(2);
-  a.DoA(1);
-}
-
-// Tests Expectation.
-
-TEST(ExpectationTest, ConstrutorsWork) {
-  MockA a;
-  Expectation e1;  // Default ctor.
-
-  // Ctor from various forms of EXPECT_CALL.
-  Expectation e2 = EXPECT_CALL(a, DoA(2));
-  Expectation e3 = EXPECT_CALL(a, DoA(3)).With(_);
-  {
-    Sequence s;
-    Expectation e4 = EXPECT_CALL(a, DoA(4)).Times(1);
-    Expectation e5 = EXPECT_CALL(a, DoA(5)).InSequence(s);
-  }
-  Expectation e6 = EXPECT_CALL(a, DoA(6)).After(e2);
-  Expectation e7 = EXPECT_CALL(a, DoA(7)).WillOnce(Return());
-  Expectation e8 = EXPECT_CALL(a, DoA(8)).WillRepeatedly(Return());
-  Expectation e9 = EXPECT_CALL(a, DoA(9)).RetiresOnSaturation();
-
-  Expectation e10 = e2;  // Copy ctor.
-
-  EXPECT_THAT(e1, Ne(e2));
-  EXPECT_THAT(e2, Eq(e10));
-
-  a.DoA(2);
-  a.DoA(3);
-  a.DoA(4);
-  a.DoA(5);
-  a.DoA(6);
-  a.DoA(7);
-  a.DoA(8);
-  a.DoA(9);
-}
-
-TEST(ExpectationTest, AssignmentWorks) {
-  MockA a;
-  Expectation e1;
-  Expectation e2 = EXPECT_CALL(a, DoA(1));
-
-  EXPECT_THAT(e1, Ne(e2));
-
-  e1 = e2;
-  EXPECT_THAT(e1, Eq(e2));
-
-  a.DoA(1);
-}
-
-// Tests ExpectationSet.
-
-TEST(ExpectationSetTest, MemberTypesAreCorrect) {
-  ::testing::StaticAssertTypeEq<Expectation, ExpectationSet::value_type>();
-}
-
-TEST(ExpectationSetTest, ConstructorsWork) {
-  MockA a;
-
-  Expectation e1;
-  const Expectation e2;
-  ExpectationSet es1;  // Default ctor.
-  ExpectationSet es2 = EXPECT_CALL(a, DoA(1));  // Ctor from EXPECT_CALL.
-  ExpectationSet es3 = e1;  // Ctor from Expectation.
-  ExpectationSet es4(e1);   // Ctor from Expectation; alternative syntax.
-  ExpectationSet es5 = e2;  // Ctor from const Expectation.
-  ExpectationSet es6(e2);   // Ctor from const Expectation; alternative syntax.
-  ExpectationSet es7 = es2;  // Copy ctor.
-
-  EXPECT_EQ(0, es1.size());
-  EXPECT_EQ(1, es2.size());
-  EXPECT_EQ(1, es3.size());
-  EXPECT_EQ(1, es4.size());
-  EXPECT_EQ(1, es5.size());
-  EXPECT_EQ(1, es6.size());
-  EXPECT_EQ(1, es7.size());
-
-  EXPECT_THAT(es3, Ne(es2));
-  EXPECT_THAT(es4, Eq(es3));
-  EXPECT_THAT(es5, Eq(es4));
-  EXPECT_THAT(es6, Eq(es5));
-  EXPECT_THAT(es7, Eq(es2));
-  a.DoA(1);
-}
-
-TEST(ExpectationSetTest, AssignmentWorks) {
-  ExpectationSet es1;
-  ExpectationSet es2 = Expectation();
-
-  es1 = es2;
-  EXPECT_EQ(1, es1.size());
-  EXPECT_THAT(*(es1.begin()), Eq(Expectation()));
-  EXPECT_THAT(es1, Eq(es2));
-}
-
-TEST(ExpectationSetTest, InsertionWorks) {
-  ExpectationSet es1;
-  Expectation e1;
-  es1 += e1;
-  EXPECT_EQ(1, es1.size());
-  EXPECT_THAT(*(es1.begin()), Eq(e1));
-
-  MockA a;
-  Expectation e2 = EXPECT_CALL(a, DoA(1));
-  es1 += e2;
-  EXPECT_EQ(2, es1.size());
-
-  ExpectationSet::const_iterator it1 = es1.begin();
-  ExpectationSet::const_iterator it2 = it1;
-  ++it2;
-  EXPECT_TRUE(*it1 == e1 || *it2 == e1);  // e1 must be in the set.
-  EXPECT_TRUE(*it1 == e2 || *it2 == e2);  // e2 must be in the set too.
-  a.DoA(1);
-}
-
-TEST(ExpectationSetTest, SizeWorks) {
-  ExpectationSet es;
-  EXPECT_EQ(0, es.size());
-
-  es += Expectation();
-  EXPECT_EQ(1, es.size());
-
-  MockA a;
-  es += EXPECT_CALL(a, DoA(1));
-  EXPECT_EQ(2, es.size());
-
-  a.DoA(1);
-}
-
-TEST(ExpectationSetTest, IsEnumerable) {
-  ExpectationSet es;
-  EXPECT_TRUE(es.begin() == es.end());
-
-  es += Expectation();
-  ExpectationSet::const_iterator it = es.begin();
-  EXPECT_TRUE(it != es.end());
-  EXPECT_THAT(*it, Eq(Expectation()));
-  ++it;
-  EXPECT_TRUE(it== es.end());
-}
-
-// Tests the .After() clause.
-
-TEST(AfterTest, SucceedsWhenPartialOrderIsSatisfied) {
-  MockA a;
-  ExpectationSet es;
-  es += EXPECT_CALL(a, DoA(1));
-  es += EXPECT_CALL(a, DoA(2));
-  EXPECT_CALL(a, DoA(3))
-      .After(es);
-
-  a.DoA(1);
-  a.DoA(2);
-  a.DoA(3);
-}
-
-TEST(AfterTest, SucceedsWhenTotalOrderIsSatisfied) {
-  MockA a;
-  MockB b;
-  // The following also verifies that const Expectation objects work
-  // too.  Do not remove the const modifiers.
-  const Expectation e1 = EXPECT_CALL(a, DoA(1));
-  const Expectation e2 = EXPECT_CALL(b, DoB())
-      .Times(2)
-      .After(e1);
-  EXPECT_CALL(a, DoA(2)).After(e2);
-
-  a.DoA(1);
-  b.DoB();
-  b.DoB();
-  a.DoA(2);
-}
-
-// Calls must be in strict order when specified so using .After().
-TEST(AfterTest, CallsMustBeInStrictOrderWhenSpecifiedSo1) {
-  MockA a;
-  MockB b;
-
-  // Define ordering:
-  //   a.DoA(1) ==> b.DoB() ==> a.DoA(2)
-  Expectation e1 = EXPECT_CALL(a, DoA(1));
-  Expectation e2 = EXPECT_CALL(b, DoB())
-      .After(e1);
-  EXPECT_CALL(a, DoA(2))
-      .After(e2);
-
-  a.DoA(1);
-
-  // May only be called after DoB().
-  EXPECT_NONFATAL_FAILURE(a.DoA(2), "Unexpected mock function call");
-
-  b.DoB();
-  a.DoA(2);
-}
-
-// Calls must be in strict order when specified so using .After().
-TEST(AfterTest, CallsMustBeInStrictOrderWhenSpecifiedSo2) {
-  MockA a;
-  MockB b;
-
-  // Define ordering:
-  //   a.DoA(1) ==> b.DoB() * 2 ==> a.DoA(2)
-  Expectation e1 = EXPECT_CALL(a, DoA(1));
-  Expectation e2 = EXPECT_CALL(b, DoB())
-      .Times(2)
-      .After(e1);
-  EXPECT_CALL(a, DoA(2))
-      .After(e2);
-
-  a.DoA(1);
-  b.DoB();
-
-  // May only be called after the second DoB().
-  EXPECT_NONFATAL_FAILURE(a.DoA(2), "Unexpected mock function call");
-
-  b.DoB();
-  a.DoA(2);
-}
-
-// Calls must satisfy the partial order when specified so.
-TEST(AfterTest, CallsMustSatisfyPartialOrderWhenSpecifiedSo) {
-  MockA a;
-  ON_CALL(a, ReturnResult(_))
-      .WillByDefault(Return(Result()));
-
-  // Define ordering:
-  //   a.DoA(1) ==>
-  //   a.DoA(2) ==> a.ReturnResult(3)
-  Expectation e = EXPECT_CALL(a, DoA(1));
-  const ExpectationSet es = EXPECT_CALL(a, DoA(2));
-  EXPECT_CALL(a, ReturnResult(3))
-      .After(e, es);
-
-  // May only be called last.
-  EXPECT_NONFATAL_FAILURE(a.ReturnResult(3), "Unexpected mock function call");
-
-  a.DoA(2);
-  a.DoA(1);
-  a.ReturnResult(3);
-}
-
-// Calls must satisfy the partial order when specified so.
-TEST(AfterTest, CallsMustSatisfyPartialOrderWhenSpecifiedSo2) {
-  MockA a;
-
-  // Define ordering:
-  //   a.DoA(1) ==>
-  //   a.DoA(2) ==> a.DoA(3)
-  Expectation e = EXPECT_CALL(a, DoA(1));
-  const ExpectationSet es = EXPECT_CALL(a, DoA(2));
-  EXPECT_CALL(a, DoA(3))
-      .After(e, es);
-
-  a.DoA(2);
-
-  // May only be called last.
-  EXPECT_NONFATAL_FAILURE(a.DoA(3), "Unexpected mock function call");
-
-  a.DoA(1);
-  a.DoA(3);
-}
-
-// .After() can be combined with .InSequence().
-TEST(AfterTest, CanBeUsedWithInSequence) {
-  MockA a;
-  Sequence s;
-  Expectation e = EXPECT_CALL(a, DoA(1));
-  EXPECT_CALL(a, DoA(2)).InSequence(s);
-  EXPECT_CALL(a, DoA(3))
-      .InSequence(s)
-      .After(e);
-
-  a.DoA(1);
-
-  // May only be after DoA(2).
-  EXPECT_NONFATAL_FAILURE(a.DoA(3), "Unexpected mock function call");
-
-  a.DoA(2);
-  a.DoA(3);
-}
-
-// .After() can be called multiple times.
-TEST(AfterTest, CanBeCalledManyTimes) {
-  MockA a;
-  Expectation e1 = EXPECT_CALL(a, DoA(1));
-  Expectation e2 = EXPECT_CALL(a, DoA(2));
-  Expectation e3 = EXPECT_CALL(a, DoA(3));
-  EXPECT_CALL(a, DoA(4))
-      .After(e1)
-      .After(e2)
-      .After(e3);
-
-  a.DoA(3);
-  a.DoA(1);
-  a.DoA(2);
-  a.DoA(4);
-}
-
-// .After() accepts up to 5 arguments.
-TEST(AfterTest, AcceptsUpToFiveArguments) {
-  MockA a;
-  Expectation e1 = EXPECT_CALL(a, DoA(1));
-  Expectation e2 = EXPECT_CALL(a, DoA(2));
-  Expectation e3 = EXPECT_CALL(a, DoA(3));
-  ExpectationSet es1 = EXPECT_CALL(a, DoA(4));
-  ExpectationSet es2 = EXPECT_CALL(a, DoA(5));
-  EXPECT_CALL(a, DoA(6))
-      .After(e1, e2, e3, es1, es2);
-
-  a.DoA(5);
-  a.DoA(2);
-  a.DoA(4);
-  a.DoA(1);
-  a.DoA(3);
-  a.DoA(6);
-}
-
-// .After() allows input to contain duplicated Expectations.
-TEST(AfterTest, AcceptsDuplicatedInput) {
-  MockA a;
-  ON_CALL(a, ReturnResult(_))
-      .WillByDefault(Return(Result()));
-
-  // Define ordering:
-  //   DoA(1) ==>
-  //   DoA(2) ==> ReturnResult(3)
-  Expectation e1 = EXPECT_CALL(a, DoA(1));
-  Expectation e2 = EXPECT_CALL(a, DoA(2));
-  ExpectationSet es;
-  es += e1;
-  es += e2;
-  EXPECT_CALL(a, ReturnResult(3))
-      .After(e1, e2, es, e1);
-
-  a.DoA(1);
-
-  // May only be after DoA(2).
-  EXPECT_NONFATAL_FAILURE(a.ReturnResult(3), "Unexpected mock function call");
-
-  a.DoA(2);
-  a.ReturnResult(3);
-}
-
-// An Expectation added to an ExpectationSet after it has been used in
-// an .After() has no effect.
-TEST(AfterTest, ChangesToExpectationSetHaveNoEffectAfterwards) {
-  MockA a;
-  ExpectationSet es1 = EXPECT_CALL(a, DoA(1));
-  Expectation e2 = EXPECT_CALL(a, DoA(2));
-  EXPECT_CALL(a, DoA(3))
-      .After(es1);
-  es1 += e2;
-
-  a.DoA(1);
-  a.DoA(3);
-  a.DoA(2);
-}
-
-// Tests that Google Mock correctly handles calls to mock functions
-// after a mock object owning one of their pre-requisites has died.
-
-// Tests that calls that satisfy the original spec are successful.
-TEST(DeletingMockEarlyTest, Success1) {
-  MockB* const b1 = new MockB;
-  MockA* const a = new MockA;
-  MockB* const b2 = new MockB;
-
-  {
-    InSequence dummy;
-    EXPECT_CALL(*b1, DoB(_))
-        .WillOnce(Return(1));
-    EXPECT_CALL(*a, Binary(_, _))
-        .Times(AnyNumber())
-        .WillRepeatedly(Return(true));
-    EXPECT_CALL(*b2, DoB(_))
-        .Times(AnyNumber())
-        .WillRepeatedly(Return(2));
-  }
-
-  EXPECT_EQ(1, b1->DoB(1));
-  delete b1;
-  // a's pre-requisite has died.
-  EXPECT_TRUE(a->Binary(0, 1));
-  delete b2;
-  // a's successor has died.
-  EXPECT_TRUE(a->Binary(1, 2));
-  delete a;
-}
-
-// Tests that calls that satisfy the original spec are successful.
-TEST(DeletingMockEarlyTest, Success2) {
-  MockB* const b1 = new MockB;
-  MockA* const a = new MockA;
-  MockB* const b2 = new MockB;
-
-  {
-    InSequence dummy;
-    EXPECT_CALL(*b1, DoB(_))
-        .WillOnce(Return(1));
-    EXPECT_CALL(*a, Binary(_, _))
-        .Times(AnyNumber());
-    EXPECT_CALL(*b2, DoB(_))
-        .Times(AnyNumber())
-        .WillRepeatedly(Return(2));
-  }
-
-  delete a;  // a is trivially satisfied.
-  EXPECT_EQ(1, b1->DoB(1));
-  EXPECT_EQ(2, b2->DoB(2));
-  delete b1;
-  delete b2;
-}
-
-// Tests that it's OK to delete a mock object itself in its action.
-
-// Suppresses warning on unreferenced formal parameter in MSVC with
-// -W4.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-ACTION_P(Delete, ptr) { delete ptr; }
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-TEST(DeletingMockEarlyTest, CanDeleteSelfInActionReturningVoid) {
-  MockA* const a = new MockA;
-  EXPECT_CALL(*a, DoA(_)).WillOnce(Delete(a));
-  a->DoA(42);  // This will cause a to be deleted.
-}
-
-TEST(DeletingMockEarlyTest, CanDeleteSelfInActionReturningValue) {
-  MockA* const a = new MockA;
-  EXPECT_CALL(*a, ReturnResult(_))
-      .WillOnce(DoAll(Delete(a), Return(Result())));
-  a->ReturnResult(42);  // This will cause a to be deleted.
-}
-
-// Tests that calls that violate the original spec yield failures.
-TEST(DeletingMockEarlyTest, Failure1) {
-  MockB* const b1 = new MockB;
-  MockA* const a = new MockA;
-  MockB* const b2 = new MockB;
-
-  {
-    InSequence dummy;
-    EXPECT_CALL(*b1, DoB(_))
-        .WillOnce(Return(1));
-    EXPECT_CALL(*a, Binary(_, _))
-        .Times(AnyNumber());
-    EXPECT_CALL(*b2, DoB(_))
-        .Times(AnyNumber())
-        .WillRepeatedly(Return(2));
-  }
-
-  delete a;  // a is trivially satisfied.
-  EXPECT_NONFATAL_FAILURE({
-    b2->DoB(2);
-  }, "Unexpected mock function call");
-  EXPECT_EQ(1, b1->DoB(1));
-  delete b1;
-  delete b2;
-}
-
-// Tests that calls that violate the original spec yield failures.
-TEST(DeletingMockEarlyTest, Failure2) {
-  MockB* const b1 = new MockB;
-  MockA* const a = new MockA;
-  MockB* const b2 = new MockB;
-
-  {
-    InSequence dummy;
-    EXPECT_CALL(*b1, DoB(_));
-    EXPECT_CALL(*a, Binary(_, _))
-        .Times(AnyNumber());
-    EXPECT_CALL(*b2, DoB(_))
-        .Times(AnyNumber());
-  }
-
-  EXPECT_NONFATAL_FAILURE(delete b1,
-                          "Actual: never called");
-  EXPECT_NONFATAL_FAILURE(a->Binary(0, 1),
-                          "Unexpected mock function call");
-  EXPECT_NONFATAL_FAILURE(b2->DoB(1),
-                          "Unexpected mock function call");
-  delete a;
-  delete b2;
-}
-
-class EvenNumberCardinality : public CardinalityInterface {
- public:
-  // Returns true if and only if call_count calls will satisfy this
-  // cardinality.
-  bool IsSatisfiedByCallCount(int call_count) const override {
-    return call_count % 2 == 0;
-  }
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  bool IsSaturatedByCallCount(int /* call_count */) const override {
-    return false;
-  }
-
-  // Describes self to an ostream.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "called even number of times";
-  }
-};
-
-Cardinality EvenNumber() {
-  return Cardinality(new EvenNumberCardinality);
-}
-
-TEST(ExpectationBaseTest,
-     AllPrerequisitesAreSatisfiedWorksForNonMonotonicCardinality) {
-  MockA* a = new MockA;
-  Sequence s;
-
-  EXPECT_CALL(*a, DoA(1))
-      .Times(EvenNumber())
-      .InSequence(s);
-  EXPECT_CALL(*a, DoA(2))
-      .Times(AnyNumber())
-      .InSequence(s);
-  EXPECT_CALL(*a, DoA(3))
-      .Times(AnyNumber());
-
-  a->DoA(3);
-  a->DoA(1);
-  EXPECT_NONFATAL_FAILURE(a->DoA(2), "Unexpected mock function call");
-  EXPECT_NONFATAL_FAILURE(delete a, "to be called even number of times");
-}
-
-// The following tests verify the message generated when a mock
-// function is called.
-
-struct Printable {
-};
-
-inline void operator<<(::std::ostream& os, const Printable&) {
-  os << "Printable";
-}
-
-struct Unprintable {
-  Unprintable() : value(0) {}
-  int value;
-};
-
-class MockC {
- public:
-  MockC() {}
-
-  MOCK_METHOD6(VoidMethod, void(bool cond, int n, std::string s, void* p,
-                                const Printable& x, Unprintable y));
-  MOCK_METHOD0(NonVoidMethod, int());  // NOLINT
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockC);
-};
-
-class VerboseFlagPreservingFixture : public testing::Test {
- protected:
-  VerboseFlagPreservingFixture()
-      : saved_verbose_flag_(GMOCK_FLAG(verbose)) {}
-
-  ~VerboseFlagPreservingFixture() override {
-    GMOCK_FLAG(verbose) = saved_verbose_flag_;
-  }
-
- private:
-  const std::string saved_verbose_flag_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(VerboseFlagPreservingFixture);
-};
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Tests that an uninteresting mock function call on a naggy mock
-// generates a warning without the stack trace when
-// --gmock_verbose=warning is specified.
-TEST(FunctionCallMessageTest,
-     UninterestingCallOnNaggyMockGeneratesNoStackTraceWhenVerboseWarning) {
-  GMOCK_FLAG(verbose) = kWarningVerbosity;
-  NaggyMock<MockC> c;
-  CaptureStdout();
-  c.VoidMethod(false, 5, "Hi", nullptr, Printable(), Unprintable());
-  const std::string output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(IsSubstring, "GMOCK WARNING", output);
-  EXPECT_PRED_FORMAT2(IsNotSubstring, "Stack trace:", output);
-}
-
-// Tests that an uninteresting mock function call on a naggy mock
-// generates a warning containing the stack trace when
-// --gmock_verbose=info is specified.
-TEST(FunctionCallMessageTest,
-     UninterestingCallOnNaggyMockGeneratesFyiWithStackTraceWhenVerboseInfo) {
-  GMOCK_FLAG(verbose) = kInfoVerbosity;
-  NaggyMock<MockC> c;
-  CaptureStdout();
-  c.VoidMethod(false, 5, "Hi", nullptr, Printable(), Unprintable());
-  const std::string output = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(IsSubstring, "GMOCK WARNING", output);
-  EXPECT_PRED_FORMAT2(IsSubstring, "Stack trace:", output);
-
-# ifndef NDEBUG
-
-  // We check the stack trace content in dbg-mode only, as opt-mode
-  // may inline the call we are interested in seeing.
-
-  // Verifies that a void mock function's name appears in the stack
-  // trace.
-  EXPECT_PRED_FORMAT2(IsSubstring, "VoidMethod(", output);
-
-  // Verifies that a non-void mock function's name appears in the
-  // stack trace.
-  CaptureStdout();
-  c.NonVoidMethod();
-  const std::string output2 = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(IsSubstring, "NonVoidMethod(", output2);
-
-# endif  // NDEBUG
-}
-
-// Tests that an uninteresting mock function call on a naggy mock
-// causes the function arguments and return value to be printed.
-TEST(FunctionCallMessageTest,
-     UninterestingCallOnNaggyMockPrintsArgumentsAndReturnValue) {
-  // A non-void mock function.
-  NaggyMock<MockB> b;
-  CaptureStdout();
-  b.DoB();
-  const std::string output1 = GetCapturedStdout();
-  EXPECT_PRED_FORMAT2(
-      IsSubstring,
-      "Uninteresting mock function call - returning default value.\n"
-      "    Function call: DoB()\n"
-      "          Returns: 0\n", output1.c_str());
-  // Makes sure the return value is printed.
-
-  // A void mock function.
-  NaggyMock<MockC> c;
-  CaptureStdout();
-  c.VoidMethod(false, 5, "Hi", nullptr, Printable(), Unprintable());
-  const std::string output2 = GetCapturedStdout();
-  EXPECT_THAT(output2.c_str(),
-              ContainsRegex(
-                  "Uninteresting mock function call - returning directly\\.\n"
-                  "    Function call: VoidMethod"
-                  "\\(false, 5, \"Hi\", NULL, @.+ "
-                  "Printable, 4-byte object <00-00 00-00>\\)"));
-  // A void function has no return value to print.
-}
-
-// Tests how the --gmock_verbose flag affects Google Mock's output.
-
-class GMockVerboseFlagTest : public VerboseFlagPreservingFixture {
- public:
-  // Verifies that the given Google Mock output is correct.  (When
-  // should_print is true, the output should match the given regex and
-  // contain the given function name in the stack trace.  When it's
-  // false, the output should be empty.)
-  void VerifyOutput(const std::string& output, bool should_print,
-                    const std::string& expected_substring,
-                    const std::string& function_name) {
-    if (should_print) {
-      EXPECT_THAT(output.c_str(), HasSubstr(expected_substring));
-# ifndef NDEBUG
-      // We check the stack trace content in dbg-mode only, as opt-mode
-      // may inline the call we are interested in seeing.
-      EXPECT_THAT(output.c_str(), HasSubstr(function_name));
-# else
-      // Suppresses 'unused function parameter' warnings.
-      static_cast<void>(function_name);
-# endif  // NDEBUG
-    } else {
-      EXPECT_STREQ("", output.c_str());
-    }
-  }
-
-  // Tests how the flag affects expected calls.
-  void TestExpectedCall(bool should_print) {
-    MockA a;
-    EXPECT_CALL(a, DoA(5));
-    EXPECT_CALL(a, Binary(_, 1))
-        .WillOnce(Return(true));
-
-    // A void-returning function.
-    CaptureStdout();
-    a.DoA(5);
-    VerifyOutput(
-        GetCapturedStdout(),
-        should_print,
-        "Mock function call matches EXPECT_CALL(a, DoA(5))...\n"
-        "    Function call: DoA(5)\n"
-        "Stack trace:\n",
-        "DoA");
-
-    // A non-void-returning function.
-    CaptureStdout();
-    a.Binary(2, 1);
-    VerifyOutput(
-        GetCapturedStdout(),
-        should_print,
-        "Mock function call matches EXPECT_CALL(a, Binary(_, 1))...\n"
-        "    Function call: Binary(2, 1)\n"
-        "          Returns: true\n"
-        "Stack trace:\n",
-        "Binary");
-  }
-
-  // Tests how the flag affects uninteresting calls on a naggy mock.
-  void TestUninterestingCallOnNaggyMock(bool should_print) {
-    NaggyMock<MockA> a;
-    const std::string note =
-        "NOTE: You can safely ignore the above warning unless this "
-        "call should not happen.  Do not suppress it by blindly adding "
-        "an EXPECT_CALL() if you don't mean to enforce the call.  "
-        "See "
-        "https://github.com/google/googletest/blob/master/docs/"
-        "gmock_cook_book.md#"
-        "knowing-when-to-expect for details.";
-
-    // A void-returning function.
-    CaptureStdout();
-    a.DoA(5);
-    VerifyOutput(
-        GetCapturedStdout(),
-        should_print,
-        "\nGMOCK WARNING:\n"
-        "Uninteresting mock function call - returning directly.\n"
-        "    Function call: DoA(5)\n" +
-        note,
-        "DoA");
-
-    // A non-void-returning function.
-    CaptureStdout();
-    a.Binary(2, 1);
-    VerifyOutput(
-        GetCapturedStdout(),
-        should_print,
-        "\nGMOCK WARNING:\n"
-        "Uninteresting mock function call - returning default value.\n"
-        "    Function call: Binary(2, 1)\n"
-        "          Returns: false\n" +
-        note,
-        "Binary");
-  }
-};
-
-// Tests that --gmock_verbose=info causes both expected and
-// uninteresting calls to be reported.
-TEST_F(GMockVerboseFlagTest, Info) {
-  GMOCK_FLAG(verbose) = kInfoVerbosity;
-  TestExpectedCall(true);
-  TestUninterestingCallOnNaggyMock(true);
-}
-
-// Tests that --gmock_verbose=warning causes uninteresting calls to be
-// reported.
-TEST_F(GMockVerboseFlagTest, Warning) {
-  GMOCK_FLAG(verbose) = kWarningVerbosity;
-  TestExpectedCall(false);
-  TestUninterestingCallOnNaggyMock(true);
-}
-
-// Tests that --gmock_verbose=warning causes neither expected nor
-// uninteresting calls to be reported.
-TEST_F(GMockVerboseFlagTest, Error) {
-  GMOCK_FLAG(verbose) = kErrorVerbosity;
-  TestExpectedCall(false);
-  TestUninterestingCallOnNaggyMock(false);
-}
-
-// Tests that --gmock_verbose=SOME_INVALID_VALUE has the same effect
-// as --gmock_verbose=warning.
-TEST_F(GMockVerboseFlagTest, InvalidFlagIsTreatedAsWarning) {
-  GMOCK_FLAG(verbose) = "invalid";  // Treated as "warning".
-  TestExpectedCall(false);
-  TestUninterestingCallOnNaggyMock(true);
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// A helper class that generates a failure when printed.  We use it to
-// ensure that Google Mock doesn't print a value (even to an internal
-// buffer) when it is not supposed to do so.
-class PrintMeNot {};
-
-void PrintTo(PrintMeNot /* dummy */, ::std::ostream* /* os */) {
-  ADD_FAILURE() << "Google Mock is printing a value that shouldn't be "
-                << "printed even to an internal buffer.";
-}
-
-class LogTestHelper {
- public:
-  LogTestHelper() {}
-
-  MOCK_METHOD1(Foo, PrintMeNot(PrintMeNot));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(LogTestHelper);
-};
-
-class GMockLogTest : public VerboseFlagPreservingFixture {
- protected:
-  LogTestHelper helper_;
-};
-
-TEST_F(GMockLogTest, DoesNotPrintGoodCallInternallyIfVerbosityIsWarning) {
-  GMOCK_FLAG(verbose) = kWarningVerbosity;
-  EXPECT_CALL(helper_, Foo(_))
-      .WillOnce(Return(PrintMeNot()));
-  helper_.Foo(PrintMeNot());  // This is an expected call.
-}
-
-TEST_F(GMockLogTest, DoesNotPrintGoodCallInternallyIfVerbosityIsError) {
-  GMOCK_FLAG(verbose) = kErrorVerbosity;
-  EXPECT_CALL(helper_, Foo(_))
-      .WillOnce(Return(PrintMeNot()));
-  helper_.Foo(PrintMeNot());  // This is an expected call.
-}
-
-TEST_F(GMockLogTest, DoesNotPrintWarningInternallyIfVerbosityIsError) {
-  GMOCK_FLAG(verbose) = kErrorVerbosity;
-  ON_CALL(helper_, Foo(_))
-      .WillByDefault(Return(PrintMeNot()));
-  helper_.Foo(PrintMeNot());  // This should generate a warning.
-}
-
-// Tests Mock::AllowLeak().
-
-TEST(AllowLeakTest, AllowsLeakingUnusedMockObject) {
-  MockA* a = new MockA;
-  Mock::AllowLeak(a);
-}
-
-TEST(AllowLeakTest, CanBeCalledBeforeOnCall) {
-  MockA* a = new MockA;
-  Mock::AllowLeak(a);
-  ON_CALL(*a, DoA(_)).WillByDefault(Return());
-  a->DoA(0);
-}
-
-TEST(AllowLeakTest, CanBeCalledAfterOnCall) {
-  MockA* a = new MockA;
-  ON_CALL(*a, DoA(_)).WillByDefault(Return());
-  Mock::AllowLeak(a);
-}
-
-TEST(AllowLeakTest, CanBeCalledBeforeExpectCall) {
-  MockA* a = new MockA;
-  Mock::AllowLeak(a);
-  EXPECT_CALL(*a, DoA(_));
-  a->DoA(0);
-}
-
-TEST(AllowLeakTest, CanBeCalledAfterExpectCall) {
-  MockA* a = new MockA;
-  EXPECT_CALL(*a, DoA(_)).Times(AnyNumber());
-  Mock::AllowLeak(a);
-}
-
-TEST(AllowLeakTest, WorksWhenBothOnCallAndExpectCallArePresent) {
-  MockA* a = new MockA;
-  ON_CALL(*a, DoA(_)).WillByDefault(Return());
-  EXPECT_CALL(*a, DoA(_)).Times(AnyNumber());
-  Mock::AllowLeak(a);
-}
-
-// Tests that we can verify and clear a mock object's expectations
-// when none of its methods has expectations.
-TEST(VerifyAndClearExpectationsTest, NoMethodHasExpectations) {
-  MockB b;
-  ASSERT_TRUE(Mock::VerifyAndClearExpectations(&b));
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can verify and clear a mock object's expectations
-// when some, but not all, of its methods have expectations *and* the
-// verification succeeds.
-TEST(VerifyAndClearExpectationsTest, SomeMethodsHaveExpectationsAndSucceed) {
-  MockB b;
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(1));
-  b.DoB();
-  ASSERT_TRUE(Mock::VerifyAndClearExpectations(&b));
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can verify and clear a mock object's expectations
-// when some, but not all, of its methods have expectations *and* the
-// verification fails.
-TEST(VerifyAndClearExpectationsTest, SomeMethodsHaveExpectationsAndFail) {
-  MockB b;
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(1));
-  bool result = true;
-  EXPECT_NONFATAL_FAILURE(result = Mock::VerifyAndClearExpectations(&b),
-                          "Actual: never called");
-  ASSERT_FALSE(result);
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can verify and clear a mock object's expectations
-// when all of its methods have expectations.
-TEST(VerifyAndClearExpectationsTest, AllMethodsHaveExpectations) {
-  MockB b;
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(1));
-  EXPECT_CALL(b, DoB(_))
-      .WillOnce(Return(2));
-  b.DoB();
-  b.DoB(1);
-  ASSERT_TRUE(Mock::VerifyAndClearExpectations(&b));
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can verify and clear a mock object's expectations
-// when a method has more than one expectation.
-TEST(VerifyAndClearExpectationsTest, AMethodHasManyExpectations) {
-  MockB b;
-  EXPECT_CALL(b, DoB(0))
-      .WillOnce(Return(1));
-  EXPECT_CALL(b, DoB(_))
-      .WillOnce(Return(2));
-  b.DoB(1);
-  bool result = true;
-  EXPECT_NONFATAL_FAILURE(result = Mock::VerifyAndClearExpectations(&b),
-                          "Actual: never called");
-  ASSERT_FALSE(result);
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can call VerifyAndClearExpectations() on the same
-// mock object multiple times.
-TEST(VerifyAndClearExpectationsTest, CanCallManyTimes) {
-  MockB b;
-  EXPECT_CALL(b, DoB());
-  b.DoB();
-  Mock::VerifyAndClearExpectations(&b);
-
-  EXPECT_CALL(b, DoB(_))
-      .WillOnce(Return(1));
-  b.DoB(1);
-  Mock::VerifyAndClearExpectations(&b);
-  Mock::VerifyAndClearExpectations(&b);
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can clear a mock object's default actions when none
-// of its methods has default actions.
-TEST(VerifyAndClearTest, NoMethodHasDefaultActions) {
-  MockB b;
-  // If this crashes or generates a failure, the test will catch it.
-  Mock::VerifyAndClear(&b);
-  EXPECT_EQ(0, b.DoB());
-}
-
-// Tests that we can clear a mock object's default actions when some,
-// but not all of its methods have default actions.
-TEST(VerifyAndClearTest, SomeMethodsHaveDefaultActions) {
-  MockB b;
-  ON_CALL(b, DoB())
-      .WillByDefault(Return(1));
-
-  Mock::VerifyAndClear(&b);
-
-  // Verifies that the default action of int DoB() was removed.
-  EXPECT_EQ(0, b.DoB());
-}
-
-// Tests that we can clear a mock object's default actions when all of
-// its methods have default actions.
-TEST(VerifyAndClearTest, AllMethodsHaveDefaultActions) {
-  MockB b;
-  ON_CALL(b, DoB())
-      .WillByDefault(Return(1));
-  ON_CALL(b, DoB(_))
-      .WillByDefault(Return(2));
-
-  Mock::VerifyAndClear(&b);
-
-  // Verifies that the default action of int DoB() was removed.
-  EXPECT_EQ(0, b.DoB());
-
-  // Verifies that the default action of int DoB(int) was removed.
-  EXPECT_EQ(0, b.DoB(0));
-}
-
-// Tests that we can clear a mock object's default actions when a
-// method has more than one ON_CALL() set on it.
-TEST(VerifyAndClearTest, AMethodHasManyDefaultActions) {
-  MockB b;
-  ON_CALL(b, DoB(0))
-      .WillByDefault(Return(1));
-  ON_CALL(b, DoB(_))
-      .WillByDefault(Return(2));
-
-  Mock::VerifyAndClear(&b);
-
-  // Verifies that the default actions (there are two) of int DoB(int)
-  // were removed.
-  EXPECT_EQ(0, b.DoB(0));
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can call VerifyAndClear() on a mock object multiple
-// times.
-TEST(VerifyAndClearTest, CanCallManyTimes) {
-  MockB b;
-  ON_CALL(b, DoB())
-      .WillByDefault(Return(1));
-  Mock::VerifyAndClear(&b);
-  Mock::VerifyAndClear(&b);
-
-  ON_CALL(b, DoB(_))
-      .WillByDefault(Return(1));
-  Mock::VerifyAndClear(&b);
-
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that VerifyAndClear() works when the verification succeeds.
-TEST(VerifyAndClearTest, Success) {
-  MockB b;
-  ON_CALL(b, DoB())
-      .WillByDefault(Return(1));
-  EXPECT_CALL(b, DoB(1))
-      .WillOnce(Return(2));
-
-  b.DoB();
-  b.DoB(1);
-  ASSERT_TRUE(Mock::VerifyAndClear(&b));
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that VerifyAndClear() works when the verification fails.
-TEST(VerifyAndClearTest, Failure) {
-  MockB b;
-  ON_CALL(b, DoB(_))
-      .WillByDefault(Return(1));
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(2));
-
-  b.DoB(1);
-  bool result = true;
-  EXPECT_NONFATAL_FAILURE(result = Mock::VerifyAndClear(&b),
-                          "Actual: never called");
-  ASSERT_FALSE(result);
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that VerifyAndClear() works when the default actions and
-// expectations are set on a const mock object.
-TEST(VerifyAndClearTest, Const) {
-  MockB b;
-  ON_CALL(Const(b), DoB())
-      .WillByDefault(Return(1));
-
-  EXPECT_CALL(Const(b), DoB())
-      .WillOnce(DoDefault())
-      .WillOnce(Return(2));
-
-  b.DoB();
-  b.DoB();
-  ASSERT_TRUE(Mock::VerifyAndClear(&b));
-
-  // There should be no expectations on the methods now, so we can
-  // freely call them.
-  EXPECT_EQ(0, b.DoB());
-  EXPECT_EQ(0, b.DoB(1));
-}
-
-// Tests that we can set default actions and expectations on a mock
-// object after VerifyAndClear() has been called on it.
-TEST(VerifyAndClearTest, CanSetDefaultActionsAndExpectationsAfterwards) {
-  MockB b;
-  ON_CALL(b, DoB())
-      .WillByDefault(Return(1));
-  EXPECT_CALL(b, DoB(_))
-      .WillOnce(Return(2));
-  b.DoB(1);
-
-  Mock::VerifyAndClear(&b);
-
-  EXPECT_CALL(b, DoB())
-      .WillOnce(Return(3));
-  ON_CALL(b, DoB(_))
-      .WillByDefault(Return(4));
-
-  EXPECT_EQ(3, b.DoB());
-  EXPECT_EQ(4, b.DoB(1));
-}
-
-// Tests that calling VerifyAndClear() on one mock object does not
-// affect other mock objects (either of the same type or not).
-TEST(VerifyAndClearTest, DoesNotAffectOtherMockObjects) {
-  MockA a;
-  MockB b1;
-  MockB b2;
-
-  ON_CALL(a, Binary(_, _))
-      .WillByDefault(Return(true));
-  EXPECT_CALL(a, Binary(_, _))
-      .WillOnce(DoDefault())
-      .WillOnce(Return(false));
-
-  ON_CALL(b1, DoB())
-      .WillByDefault(Return(1));
-  EXPECT_CALL(b1, DoB(_))
-      .WillOnce(Return(2));
-
-  ON_CALL(b2, DoB())
-      .WillByDefault(Return(3));
-  EXPECT_CALL(b2, DoB(_));
-
-  b2.DoB(0);
-  Mock::VerifyAndClear(&b2);
-
-  // Verifies that the default actions and expectations of a and b1
-  // are still in effect.
-  EXPECT_TRUE(a.Binary(0, 0));
-  EXPECT_FALSE(a.Binary(0, 0));
-
-  EXPECT_EQ(1, b1.DoB());
-  EXPECT_EQ(2, b1.DoB(0));
-}
-
-TEST(VerifyAndClearTest,
-     DestroyingChainedMocksDoesNotDeadlockThroughExpectations) {
-  std::shared_ptr<MockA> a(new MockA);
-  ReferenceHoldingMock test_mock;
-
-  // EXPECT_CALL stores a reference to a inside test_mock.
-  EXPECT_CALL(test_mock, AcceptReference(_))
-      .WillRepeatedly(SetArgPointee<0>(a));
-
-  // Throw away the reference to the mock that we have in a. After this, the
-  // only reference to it is stored by test_mock.
-  a.reset();
-
-  // When test_mock goes out of scope, it destroys the last remaining reference
-  // to the mock object originally pointed to by a. This will cause the MockA
-  // destructor to be called from inside the ReferenceHoldingMock destructor.
-  // The state of all mocks is protected by a single global lock, but there
-  // should be no deadlock.
-}
-
-TEST(VerifyAndClearTest,
-     DestroyingChainedMocksDoesNotDeadlockThroughDefaultAction) {
-  std::shared_ptr<MockA> a(new MockA);
-  ReferenceHoldingMock test_mock;
-
-  // ON_CALL stores a reference to a inside test_mock.
-  ON_CALL(test_mock, AcceptReference(_))
-      .WillByDefault(SetArgPointee<0>(a));
-
-  // Throw away the reference to the mock that we have in a. After this, the
-  // only reference to it is stored by test_mock.
-  a.reset();
-
-  // When test_mock goes out of scope, it destroys the last remaining reference
-  // to the mock object originally pointed to by a. This will cause the MockA
-  // destructor to be called from inside the ReferenceHoldingMock destructor.
-  // The state of all mocks is protected by a single global lock, but there
-  // should be no deadlock.
-}
-
-// Tests that a mock function's action can call a mock function
-// (either the same function or a different one) either as an explicit
-// action or as a default action without causing a dead lock.  It
-// verifies that the action is not performed inside the critical
-// section.
-TEST(SynchronizationTest, CanCallMockMethodInAction) {
-  MockA a;
-  MockC c;
-  ON_CALL(a, DoA(_))
-      .WillByDefault(IgnoreResult(InvokeWithoutArgs(&c,
-                                                    &MockC::NonVoidMethod)));
-  EXPECT_CALL(a, DoA(1));
-  EXPECT_CALL(a, DoA(1))
-      .WillOnce(Invoke(&a, &MockA::DoA))
-      .RetiresOnSaturation();
-  EXPECT_CALL(c, NonVoidMethod());
-
-  a.DoA(1);
-  // This will match the second EXPECT_CALL() and trigger another a.DoA(1),
-  // which will in turn match the first EXPECT_CALL() and trigger a call to
-  // c.NonVoidMethod() that was specified by the ON_CALL() since the first
-  // EXPECT_CALL() did not specify an action.
-}
-
-TEST(ParameterlessExpectationsTest, CanSetExpectationsWithoutMatchers) {
-  MockA a;
-  int do_a_arg0 = 0;
-  ON_CALL(a, DoA).WillByDefault(SaveArg<0>(&do_a_arg0));
-  int do_a_47_arg0 = 0;
-  ON_CALL(a, DoA(47)).WillByDefault(SaveArg<0>(&do_a_47_arg0));
-
-  a.DoA(17);
-  EXPECT_THAT(do_a_arg0, 17);
-  EXPECT_THAT(do_a_47_arg0, 0);
-  a.DoA(47);
-  EXPECT_THAT(do_a_arg0, 17);
-  EXPECT_THAT(do_a_47_arg0, 47);
-
-  ON_CALL(a, Binary).WillByDefault(Return(true));
-  ON_CALL(a, Binary(_, 14)).WillByDefault(Return(false));
-  EXPECT_THAT(a.Binary(14, 17), true);
-  EXPECT_THAT(a.Binary(17, 14), false);
-}
-
-TEST(ParameterlessExpectationsTest, CanSetExpectationsForOverloadedMethods) {
-  MockB b;
-  ON_CALL(b, DoB()).WillByDefault(Return(9));
-  ON_CALL(b, DoB(5)).WillByDefault(Return(11));
-
-  EXPECT_THAT(b.DoB(), 9);
-  EXPECT_THAT(b.DoB(1), 0);  // default value
-  EXPECT_THAT(b.DoB(5), 11);
-}
-
-struct MockWithConstMethods {
- public:
-  MOCK_CONST_METHOD1(Foo, int(int));
-  MOCK_CONST_METHOD2(Bar, int(int, const char*));
-};
-
-TEST(ParameterlessExpectationsTest, CanSetExpectationsForConstMethods) {
-  MockWithConstMethods mock;
-  ON_CALL(mock, Foo).WillByDefault(Return(7));
-  ON_CALL(mock, Bar).WillByDefault(Return(33));
-
-  EXPECT_THAT(mock.Foo(17), 7);
-  EXPECT_THAT(mock.Bar(27, "purple"), 33);
-}
-
-class MockConstOverload {
- public:
-  MOCK_METHOD1(Overloaded, int(int));
-  MOCK_CONST_METHOD1(Overloaded, int(int));
-};
-
-TEST(ParameterlessExpectationsTest,
-     CanSetExpectationsForConstOverloadedMethods) {
-  MockConstOverload mock;
-  ON_CALL(mock, Overloaded(_)).WillByDefault(Return(7));
-  ON_CALL(mock, Overloaded(5)).WillByDefault(Return(9));
-  ON_CALL(Const(mock), Overloaded(5)).WillByDefault(Return(11));
-  ON_CALL(Const(mock), Overloaded(7)).WillByDefault(Return(13));
-
-  EXPECT_THAT(mock.Overloaded(1), 7);
-  EXPECT_THAT(mock.Overloaded(5), 9);
-  EXPECT_THAT(mock.Overloaded(7), 7);
-
-  const MockConstOverload& const_mock = mock;
-  EXPECT_THAT(const_mock.Overloaded(1), 0);
-  EXPECT_THAT(const_mock.Overloaded(5), 11);
-  EXPECT_THAT(const_mock.Overloaded(7), 13);
-}
-
-}  // namespace
-
-// Allows the user to define their own main and then invoke gmock_main
-// from it. This might be necessary on some platforms which require
-// specific setup and teardown.
-#if GMOCK_RENAME_MAIN
-int gmock_main(int argc, char **argv) {
-#else
-int main(int argc, char **argv) {
-#endif  // GMOCK_RENAME_MAIN
-  testing::InitGoogleMock(&argc, argv);
-  // Ensures that the tests pass no matter what value of
-  // --gmock_catch_leaked_mocks and --gmock_verbose the user specifies.
-  testing::GMOCK_FLAG(catch_leaked_mocks) = true;
-  testing::GMOCK_FLAG(verbose) = testing::internal::kWarningVerbosity;
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googlemock/test/gmock_all_test.cc b/third_party/googletest/googlemock/test/gmock_all_test.cc
deleted file mode 100644
index fffbb8b..0000000
--- a/third_party/googletest/googlemock/test/gmock_all_test.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google C++ Mocking Framework (Google Mock)
-//
-// Some users use a build system that Google Mock doesn't support directly,
-// yet they still want to build and run Google Mock's own tests.  This file
-// includes most such tests, making it easier for these users to maintain
-// their build scripts (they just need to build this file, even though the
-// below list of actual *_test.cc files might change).
-#include "test/gmock-actions_test.cc"
-#include "test/gmock-cardinalities_test.cc"
-#include "test/gmock-internal-utils_test.cc"
-#include "test/gmock-matchers_test.cc"
-#include "test/gmock-more-actions_test.cc"
-#include "test/gmock-nice-strict_test.cc"
-#include "test/gmock-port_test.cc"
-#include "test/gmock-spec-builders_test.cc"
-#include "test/gmock_test.cc"
diff --git a/third_party/googletest/googlemock/test/gmock_ex_test.cc b/third_party/googletest/googlemock/test/gmock_ex_test.cc
deleted file mode 100644
index 72eb43f..0000000
--- a/third_party/googletest/googlemock/test/gmock_ex_test.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Mock's functionality that depends on exceptions.
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_EXCEPTIONS
-namespace {
-
-using testing::HasSubstr;
-
-using testing::internal::GoogleTestFailureException;
-
-// A type that cannot be default constructed.
-class NonDefaultConstructible {
- public:
-  explicit NonDefaultConstructible(int /* dummy */) {}
-};
-
-class MockFoo {
- public:
-  // A mock method that returns a user-defined type.  Google Mock
-  // doesn't know what the default value for this type is.
-  MOCK_METHOD0(GetNonDefaultConstructible, NonDefaultConstructible());
-};
-
-TEST(DefaultValueTest, ThrowsRuntimeErrorWhenNoDefaultValue) {
-  MockFoo mock;
-  try {
-    // No expectation is set on this method, so Google Mock must
-    // return the default value.  However, since Google Mock knows
-    // nothing about the return type, it doesn't know what to return,
-    // and has to throw (when exceptions are enabled) or abort
-    // (otherwise).
-    mock.GetNonDefaultConstructible();
-    FAIL() << "GetNonDefaultConstructible()'s return type has no default "
-           << "value, so Google Mock should have thrown.";
-  } catch (const GoogleTestFailureException& /* unused */) {
-    FAIL() << "Google Test does not try to catch an exception of type "
-           << "GoogleTestFailureException, which is used for reporting "
-           << "a failure to other testing frameworks.  Google Mock should "
-           << "not throw a GoogleTestFailureException as it will kill the "
-           << "entire test program instead of just the current TEST.";
-  } catch (const std::exception& ex) {
-    EXPECT_THAT(ex.what(), HasSubstr("has no default value"));
-  }
-}
-
-
-}  // unnamed namespace
-#endif
diff --git a/third_party/googletest/googlemock/test/gmock_leak_test.py b/third_party/googletest/googlemock/test/gmock_leak_test.py
deleted file mode 100755
index 7e4b1ee..0000000
--- a/third_party/googletest/googlemock/test/gmock_leak_test.py
+++ /dev/null
@@ -1,104 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests that leaked mock objects can be caught be Google Mock."""
-
-import gmock_test_utils
-
-PROGRAM_PATH = gmock_test_utils.GetTestExecutablePath('gmock_leak_test_')
-TEST_WITH_EXPECT_CALL = [PROGRAM_PATH, '--gtest_filter=*ExpectCall*']
-TEST_WITH_ON_CALL = [PROGRAM_PATH, '--gtest_filter=*OnCall*']
-TEST_MULTIPLE_LEAKS = [PROGRAM_PATH, '--gtest_filter=*MultipleLeaked*']
-
-environ = gmock_test_utils.environ
-SetEnvVar = gmock_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gmock_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-
-class GMockLeakTest(gmock_test_utils.TestCase):
-
-  def testCatchesLeakedMockByDefault(self):
-    self.assertNotEqual(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_EXPECT_CALL,
-                                    env=environ).exit_code)
-    self.assertNotEqual(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_ON_CALL,
-                                    env=environ).exit_code)
-
-  def testDoesNotCatchLeakedMockWhenDisabled(self):
-    self.assertEquals(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_EXPECT_CALL +
-                                    ['--gmock_catch_leaked_mocks=0'],
-                                    env=environ).exit_code)
-    self.assertEquals(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_ON_CALL +
-                                    ['--gmock_catch_leaked_mocks=0'],
-                                    env=environ).exit_code)
-
-  def testCatchesLeakedMockWhenEnabled(self):
-    self.assertNotEqual(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_EXPECT_CALL +
-                                    ['--gmock_catch_leaked_mocks'],
-                                    env=environ).exit_code)
-    self.assertNotEqual(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_ON_CALL +
-                                    ['--gmock_catch_leaked_mocks'],
-                                    env=environ).exit_code)
-
-  def testCatchesLeakedMockWhenEnabledWithExplictFlagValue(self):
-    self.assertNotEqual(
-        0,
-        gmock_test_utils.Subprocess(TEST_WITH_EXPECT_CALL +
-                                    ['--gmock_catch_leaked_mocks=1'],
-                                    env=environ).exit_code)
-
-  def testCatchesMultipleLeakedMocks(self):
-    self.assertNotEqual(
-        0,
-        gmock_test_utils.Subprocess(TEST_MULTIPLE_LEAKS +
-                                    ['--gmock_catch_leaked_mocks'],
-                                    env=environ).exit_code)
-
-
-if __name__ == '__main__':
-  gmock_test_utils.Main()
diff --git a/third_party/googletest/googlemock/test/gmock_leak_test_.cc b/third_party/googletest/googlemock/test/gmock_leak_test_.cc
deleted file mode 100644
index 2e095ab..0000000
--- a/third_party/googletest/googlemock/test/gmock_leak_test_.cc
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This program is for verifying that a leaked mock object can be
-// caught by Google Mock's leak detector.
-
-#include "gmock/gmock.h"
-
-namespace {
-
-using ::testing::Return;
-
-class FooInterface {
- public:
-  virtual ~FooInterface() {}
-  virtual void DoThis() = 0;
-};
-
-class MockFoo : public FooInterface {
- public:
-  MockFoo() {}
-
-  MOCK_METHOD0(DoThis, void());
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
-};
-
-TEST(LeakTest, LeakedMockWithExpectCallCausesFailureWhenLeakCheckingIsEnabled) {
-  MockFoo* foo = new MockFoo;
-
-  EXPECT_CALL(*foo, DoThis());
-  foo->DoThis();
-
-  // In order to test the leak detector, we deliberately leak foo.
-
-  // Makes sure Google Mock's leak detector can change the exit code
-  // to 1 even when the code is already exiting with 0.
-  exit(0);
-}
-
-TEST(LeakTest, LeakedMockWithOnCallCausesFailureWhenLeakCheckingIsEnabled) {
-  MockFoo* foo = new MockFoo;
-
-  ON_CALL(*foo, DoThis()).WillByDefault(Return());
-
-  // In order to test the leak detector, we deliberately leak foo.
-
-  // Makes sure Google Mock's leak detector can change the exit code
-  // to 1 even when the code is already exiting with 0.
-  exit(0);
-}
-
-TEST(LeakTest, CatchesMultipleLeakedMockObjects) {
-  MockFoo* foo1 = new MockFoo;
-  MockFoo* foo2 = new MockFoo;
-
-  ON_CALL(*foo1, DoThis()).WillByDefault(Return());
-  EXPECT_CALL(*foo2, DoThis());
-  foo2->DoThis();
-
-  // In order to test the leak detector, we deliberately leak foo1 and
-  // foo2.
-
-  // Makes sure Google Mock's leak detector can change the exit code
-  // to 1 even when the code is already exiting with 0.
-  exit(0);
-}
-
-}  // namespace
diff --git a/third_party/googletest/googlemock/test/gmock_link2_test.cc b/third_party/googletest/googlemock/test/gmock_link2_test.cc
deleted file mode 100644
index d27ce17..0000000
--- a/third_party/googletest/googlemock/test/gmock_link2_test.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file is for verifying that various Google Mock constructs do not
-// produce linker errors when instantiated in different translation units.
-// Please see gmock_link_test.h for details.
-
-#define LinkTest LinkTest2
-
-#include "test/gmock_link_test.h"
diff --git a/third_party/googletest/googlemock/test/gmock_link_test.cc b/third_party/googletest/googlemock/test/gmock_link_test.cc
deleted file mode 100644
index e7c54cc..0000000
--- a/third_party/googletest/googlemock/test/gmock_link_test.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file is for verifying that various Google Mock constructs do not
-// produce linker errors when instantiated in different translation units.
-// Please see gmock_link_test.h for details.
-
-#define LinkTest LinkTest1
-
-#include "test/gmock_link_test.h"
diff --git a/third_party/googletest/googlemock/test/gmock_link_test.h b/third_party/googletest/googlemock/test/gmock_link_test.h
deleted file mode 100644
index 5734b2e..0000000
--- a/third_party/googletest/googlemock/test/gmock_link_test.h
+++ /dev/null
@@ -1,690 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests that:
-// a. A header file defining a mock class can be included in multiple
-//    translation units without causing a link error.
-// b. Actions and matchers can be instantiated with identical template
-//    arguments in different translation units without causing link
-//    errors.
-//    The following constructs are currently tested:
-//    Actions:
-//      Return()
-//      Return(value)
-//      ReturnNull
-//      ReturnRef
-//      Assign
-//      SetArgPointee
-//      SetArrayArgument
-//      SetErrnoAndReturn
-//      Invoke(function)
-//      Invoke(object, method)
-//      InvokeWithoutArgs(function)
-//      InvokeWithoutArgs(object, method)
-//      InvokeArgument
-//      WithArg
-//      WithArgs
-//      WithoutArgs
-//      DoAll
-//      DoDefault
-//      IgnoreResult
-//      Throw
-//      ACTION()-generated
-//      ACTION_P()-generated
-//      ACTION_P2()-generated
-//    Matchers:
-//      _
-//      A
-//      An
-//      Eq
-//      Gt, Lt, Ge, Le, Ne
-//      NotNull
-//      Ref
-//      TypedEq
-//      DoubleEq
-//      FloatEq
-//      NanSensitiveDoubleEq
-//      NanSensitiveFloatEq
-//      ContainsRegex
-//      MatchesRegex
-//      EndsWith
-//      HasSubstr
-//      StartsWith
-//      StrCaseEq
-//      StrCaseNe
-//      StrEq
-//      StrNe
-//      ElementsAre
-//      ElementsAreArray
-//      ContainerEq
-//      Field
-//      Property
-//      ResultOf(function)
-//      ResultOf(callback)
-//      Pointee
-//      Truly(predicate)
-//      AddressSatisfies
-//      AllOf
-//      AnyOf
-//      Not
-//      MatcherCast<T>
-//
-//  Please note: this test does not verify the functioning of these
-//  constructs, only that the programs using them will link successfully.
-//
-// Implementation note:
-// This test requires identical definitions of Interface and Mock to be
-// included in different translation units.  We achieve this by writing
-// them in this header and #including it in gmock_link_test.cc and
-// gmock_link2_test.cc.  Because the symbols generated by the compiler for
-// those constructs must be identical in both translation units,
-// definitions of Interface and Mock tests MUST be kept in the SAME
-// NON-ANONYMOUS namespace in this file.  The test fixture class LinkTest
-// is defined as LinkTest1 in gmock_link_test.cc and as LinkTest2 in
-// gmock_link2_test.cc to avoid producing linker errors.
-
-#ifndef GOOGLEMOCK_TEST_GMOCK_LINK_TEST_H_
-#define GOOGLEMOCK_TEST_GMOCK_LINK_TEST_H_
-
-#include "gmock/gmock.h"
-
-#if !GTEST_OS_WINDOWS_MOBILE
-# include <errno.h>
-#endif
-
-#include <iostream>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/internal/gtest-port.h"
-
-using testing::_;
-using testing::A;
-using testing::Action;
-using testing::AllOf;
-using testing::AnyOf;
-using testing::Assign;
-using testing::ContainerEq;
-using testing::DoAll;
-using testing::DoDefault;
-using testing::DoubleEq;
-using testing::ElementsAre;
-using testing::ElementsAreArray;
-using testing::EndsWith;
-using testing::Eq;
-using testing::Field;
-using testing::FloatEq;
-using testing::Ge;
-using testing::Gt;
-using testing::HasSubstr;
-using testing::IgnoreResult;
-using testing::Invoke;
-using testing::InvokeArgument;
-using testing::InvokeWithoutArgs;
-using testing::IsNull;
-using testing::IsSubsetOf;
-using testing::IsSupersetOf;
-using testing::Le;
-using testing::Lt;
-using testing::Matcher;
-using testing::MatcherCast;
-using testing::NanSensitiveDoubleEq;
-using testing::NanSensitiveFloatEq;
-using testing::Ne;
-using testing::Not;
-using testing::NotNull;
-using testing::Pointee;
-using testing::Property;
-using testing::Ref;
-using testing::ResultOf;
-using testing::Return;
-using testing::ReturnNull;
-using testing::ReturnRef;
-using testing::SetArgPointee;
-using testing::SetArrayArgument;
-using testing::StartsWith;
-using testing::StrCaseEq;
-using testing::StrCaseNe;
-using testing::StrEq;
-using testing::StrNe;
-using testing::Truly;
-using testing::TypedEq;
-using testing::WithArg;
-using testing::WithArgs;
-using testing::WithoutArgs;
-
-#if !GTEST_OS_WINDOWS_MOBILE
-using testing::SetErrnoAndReturn;
-#endif
-
-#if GTEST_HAS_EXCEPTIONS
-using testing::Throw;
-#endif
-
-using testing::ContainsRegex;
-using testing::MatchesRegex;
-
-class Interface {
- public:
-  virtual ~Interface() {}
-  virtual void VoidFromString(char* str) = 0;
-  virtual char* StringFromString(char* str) = 0;
-  virtual int IntFromString(char* str) = 0;
-  virtual int& IntRefFromString(char* str) = 0;
-  virtual void VoidFromFunc(void(*func)(char* str)) = 0;
-  virtual void VoidFromIntRef(int& n) = 0;  // NOLINT
-  virtual void VoidFromFloat(float n) = 0;
-  virtual void VoidFromDouble(double n) = 0;
-  virtual void VoidFromVector(const std::vector<int>& v) = 0;
-};
-
-class Mock: public Interface {
- public:
-  Mock() {}
-
-  MOCK_METHOD1(VoidFromString, void(char* str));
-  MOCK_METHOD1(StringFromString, char*(char* str));
-  MOCK_METHOD1(IntFromString, int(char* str));
-  MOCK_METHOD1(IntRefFromString, int&(char* str));
-  MOCK_METHOD1(VoidFromFunc, void(void(*func)(char* str)));
-  MOCK_METHOD1(VoidFromIntRef, void(int& n));  // NOLINT
-  MOCK_METHOD1(VoidFromFloat, void(float n));
-  MOCK_METHOD1(VoidFromDouble, void(double n));
-  MOCK_METHOD1(VoidFromVector, void(const std::vector<int>& v));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mock);
-};
-
-class InvokeHelper {
- public:
-  static void StaticVoidFromVoid() {}
-  void VoidFromVoid() {}
-  static void StaticVoidFromString(char* /* str */) {}
-  void VoidFromString(char* /* str */) {}
-  static int StaticIntFromString(char* /* str */) { return 1; }
-  static bool StaticBoolFromString(const char* /* str */) { return true; }
-};
-
-class FieldHelper {
- public:
-  explicit FieldHelper(int a_field) : field_(a_field) {}
-  int field() const { return field_; }
-  int field_;  // NOLINT -- need external access to field_ to test
-               //           the Field matcher.
-};
-
-// Tests the linkage of the ReturnVoid action.
-TEST(LinkTest, TestReturnVoid) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(Return());
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the Return action.
-TEST(LinkTest, TestReturn) {
-  Mock mock;
-  char ch = 'x';
-
-  EXPECT_CALL(mock, StringFromString(_)).WillOnce(Return(&ch));
-  mock.StringFromString(nullptr);
-}
-
-// Tests the linkage of the ReturnNull action.
-TEST(LinkTest, TestReturnNull) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(Return());
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the ReturnRef action.
-TEST(LinkTest, TestReturnRef) {
-  Mock mock;
-  int n = 42;
-
-  EXPECT_CALL(mock, IntRefFromString(_)).WillOnce(ReturnRef(n));
-  mock.IntRefFromString(nullptr);
-}
-
-// Tests the linkage of the Assign action.
-TEST(LinkTest, TestAssign) {
-  Mock mock;
-  char ch = 'x';
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(Assign(&ch, 'y'));
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the SetArgPointee action.
-TEST(LinkTest, TestSetArgPointee) {
-  Mock mock;
-  char ch = 'x';
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(SetArgPointee<0>('y'));
-  mock.VoidFromString(&ch);
-}
-
-// Tests the linkage of the SetArrayArgument action.
-TEST(LinkTest, TestSetArrayArgument) {
-  Mock mock;
-  char ch = 'x';
-  char ch2 = 'y';
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(SetArrayArgument<0>(&ch2,
-                                                                    &ch2 + 1));
-  mock.VoidFromString(&ch);
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-// Tests the linkage of the SetErrnoAndReturn action.
-TEST(LinkTest, TestSetErrnoAndReturn) {
-  Mock mock;
-
-  int saved_errno = errno;
-  EXPECT_CALL(mock, IntFromString(_)).WillOnce(SetErrnoAndReturn(1, -1));
-  mock.IntFromString(nullptr);
-  errno = saved_errno;
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests the linkage of the Invoke(function) and Invoke(object, method) actions.
-TEST(LinkTest, TestInvoke) {
-  Mock mock;
-  InvokeHelper test_invoke_helper;
-
-  EXPECT_CALL(mock, VoidFromString(_))
-      .WillOnce(Invoke(&InvokeHelper::StaticVoidFromString))
-      .WillOnce(Invoke(&test_invoke_helper, &InvokeHelper::VoidFromString));
-  mock.VoidFromString(nullptr);
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the InvokeWithoutArgs action.
-TEST(LinkTest, TestInvokeWithoutArgs) {
-  Mock mock;
-  InvokeHelper test_invoke_helper;
-
-  EXPECT_CALL(mock, VoidFromString(_))
-      .WillOnce(InvokeWithoutArgs(&InvokeHelper::StaticVoidFromVoid))
-      .WillOnce(InvokeWithoutArgs(&test_invoke_helper,
-                                  &InvokeHelper::VoidFromVoid));
-  mock.VoidFromString(nullptr);
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the InvokeArgument action.
-TEST(LinkTest, TestInvokeArgument) {
-  Mock mock;
-  char ch = 'x';
-
-  EXPECT_CALL(mock, VoidFromFunc(_)).WillOnce(InvokeArgument<0>(&ch));
-  mock.VoidFromFunc(InvokeHelper::StaticVoidFromString);
-}
-
-// Tests the linkage of the WithArg action.
-TEST(LinkTest, TestWithArg) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_))
-      .WillOnce(WithArg<0>(Invoke(&InvokeHelper::StaticVoidFromString)));
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the WithArgs action.
-TEST(LinkTest, TestWithArgs) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_))
-      .WillOnce(WithArgs<0>(Invoke(&InvokeHelper::StaticVoidFromString)));
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the WithoutArgs action.
-TEST(LinkTest, TestWithoutArgs) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(WithoutArgs(Return()));
-  mock.VoidFromString(nullptr);
-}
-
-// Tests the linkage of the DoAll action.
-TEST(LinkTest, TestDoAll) {
-  Mock mock;
-  char ch = 'x';
-
-  EXPECT_CALL(mock, VoidFromString(_))
-      .WillOnce(DoAll(SetArgPointee<0>('y'), Return()));
-  mock.VoidFromString(&ch);
-}
-
-// Tests the linkage of the DoDefault action.
-TEST(LinkTest, TestDoDefault) {
-  Mock mock;
-  char ch = 'x';
-
-  ON_CALL(mock, VoidFromString(_)).WillByDefault(Return());
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(DoDefault());
-  mock.VoidFromString(&ch);
-}
-
-// Tests the linkage of the IgnoreResult action.
-TEST(LinkTest, TestIgnoreResult) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(IgnoreResult(Return(42)));
-  mock.VoidFromString(nullptr);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-// Tests the linkage of the Throw action.
-TEST(LinkTest, TestThrow) {
-  Mock mock;
-
-  EXPECT_CALL(mock, VoidFromString(_)).WillOnce(Throw(42));
-  EXPECT_THROW(mock.VoidFromString(nullptr), int);
-}
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// The ACTION*() macros trigger warning C4100 (unreferenced formal
-// parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
-// the macro definition, as the warnings are generated when the macro
-// is expanded and macro expansion cannot contain #pragma.  Therefore
-// we suppress them here.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-// Tests the linkage of actions created using ACTION macro.
-namespace {
-ACTION(Return1) { return 1; }
-}
-
-TEST(LinkTest, TestActionMacro) {
-  Mock mock;
-
-  EXPECT_CALL(mock, IntFromString(_)).WillOnce(Return1());
-  mock.IntFromString(nullptr);
-}
-
-// Tests the linkage of actions created using ACTION_P macro.
-namespace {
-ACTION_P(ReturnArgument, ret_value) { return ret_value; }
-}
-
-TEST(LinkTest, TestActionPMacro) {
-  Mock mock;
-
-  EXPECT_CALL(mock, IntFromString(_)).WillOnce(ReturnArgument(42));
-  mock.IntFromString(nullptr);
-}
-
-// Tests the linkage of actions created using ACTION_P2 macro.
-namespace {
-ACTION_P2(ReturnEqualsEitherOf, first, second) {
-  return arg0 == first || arg0 == second;
-}
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-TEST(LinkTest, TestActionP2Macro) {
-  Mock mock;
-  char ch = 'x';
-
-  EXPECT_CALL(mock, IntFromString(_))
-      .WillOnce(ReturnEqualsEitherOf("one", "two"));
-  mock.IntFromString(&ch);
-}
-
-// Tests the linkage of the "_" matcher.
-TEST(LinkTest, TestMatcherAnything) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(_)).WillByDefault(Return());
-}
-
-// Tests the linkage of the A matcher.
-TEST(LinkTest, TestMatcherA) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(A<char*>())).WillByDefault(Return());
-}
-
-// Tests the linkage of the Eq and the "bare value" matcher.
-TEST(LinkTest, TestMatchersEq) {
-  Mock mock;
-  const char* p = "x";
-
-  ON_CALL(mock, VoidFromString(Eq(p))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromString(const_cast<char*>("y")))
-      .WillByDefault(Return());
-}
-
-// Tests the linkage of the Lt, Gt, Le, Ge, and Ne matchers.
-TEST(LinkTest, TestMatchersRelations) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromFloat(Lt(1.0f))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromFloat(Gt(1.0f))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromFloat(Le(1.0f))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromFloat(Ge(1.0f))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromFloat(Ne(1.0f))).WillByDefault(Return());
-}
-
-// Tests the linkage of the NotNull matcher.
-TEST(LinkTest, TestMatcherNotNull) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(NotNull())).WillByDefault(Return());
-}
-
-// Tests the linkage of the IsNull matcher.
-TEST(LinkTest, TestMatcherIsNull) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(IsNull())).WillByDefault(Return());
-}
-
-// Tests the linkage of the Ref matcher.
-TEST(LinkTest, TestMatcherRef) {
-  Mock mock;
-  int a = 0;
-
-  ON_CALL(mock, VoidFromIntRef(Ref(a))).WillByDefault(Return());
-}
-
-// Tests the linkage of the TypedEq matcher.
-TEST(LinkTest, TestMatcherTypedEq) {
-  Mock mock;
-  long a = 0;
-
-  ON_CALL(mock, VoidFromIntRef(TypedEq<int&>(a))).WillByDefault(Return());
-}
-
-// Tests the linkage of the FloatEq, DoubleEq, NanSensitiveFloatEq and
-// NanSensitiveDoubleEq matchers.
-TEST(LinkTest, TestMatchersFloatingPoint) {
-  Mock mock;
-  float a = 0;
-
-  ON_CALL(mock, VoidFromFloat(FloatEq(a))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromDouble(DoubleEq(a))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromFloat(NanSensitiveFloatEq(a))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromDouble(NanSensitiveDoubleEq(a)))
-      .WillByDefault(Return());
-}
-
-// Tests the linkage of the ContainsRegex matcher.
-TEST(LinkTest, TestMatcherContainsRegex) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(ContainsRegex(".*"))).WillByDefault(Return());
-}
-
-// Tests the linkage of the MatchesRegex matcher.
-TEST(LinkTest, TestMatcherMatchesRegex) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(MatchesRegex(".*"))).WillByDefault(Return());
-}
-
-// Tests the linkage of the StartsWith, EndsWith, and HasSubstr matchers.
-TEST(LinkTest, TestMatchersSubstrings) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromString(StartsWith("a"))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromString(EndsWith("c"))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromString(HasSubstr("b"))).WillByDefault(Return());
-}
-
-// Tests the linkage of the StrEq, StrNe, StrCaseEq, and StrCaseNe matchers.
-TEST(LinkTest, TestMatchersStringEquality) {
-  Mock mock;
-  ON_CALL(mock, VoidFromString(StrEq("a"))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromString(StrNe("a"))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromString(StrCaseEq("a"))).WillByDefault(Return());
-  ON_CALL(mock, VoidFromString(StrCaseNe("a"))).WillByDefault(Return());
-}
-
-// Tests the linkage of the ElementsAre matcher.
-TEST(LinkTest, TestMatcherElementsAre) {
-  Mock mock;
-
-  ON_CALL(mock, VoidFromVector(ElementsAre('a', _))).WillByDefault(Return());
-}
-
-// Tests the linkage of the ElementsAreArray matcher.
-TEST(LinkTest, TestMatcherElementsAreArray) {
-  Mock mock;
-  char arr[] = { 'a', 'b' };
-
-  ON_CALL(mock, VoidFromVector(ElementsAreArray(arr))).WillByDefault(Return());
-}
-
-// Tests the linkage of the IsSubsetOf matcher.
-TEST(LinkTest, TestMatcherIsSubsetOf) {
-  Mock mock;
-  char arr[] = {'a', 'b'};
-
-  ON_CALL(mock, VoidFromVector(IsSubsetOf(arr))).WillByDefault(Return());
-}
-
-// Tests the linkage of the IsSupersetOf matcher.
-TEST(LinkTest, TestMatcherIsSupersetOf) {
-  Mock mock;
-  char arr[] = {'a', 'b'};
-
-  ON_CALL(mock, VoidFromVector(IsSupersetOf(arr))).WillByDefault(Return());
-}
-
-// Tests the linkage of the ContainerEq matcher.
-TEST(LinkTest, TestMatcherContainerEq) {
-  Mock mock;
-  std::vector<int> v;
-
-  ON_CALL(mock, VoidFromVector(ContainerEq(v))).WillByDefault(Return());
-}
-
-// Tests the linkage of the Field matcher.
-TEST(LinkTest, TestMatcherField) {
-  FieldHelper helper(0);
-
-  Matcher<const FieldHelper&> m = Field(&FieldHelper::field_, Eq(0));
-  EXPECT_TRUE(m.Matches(helper));
-
-  Matcher<const FieldHelper*> m2 = Field(&FieldHelper::field_, Eq(0));
-  EXPECT_TRUE(m2.Matches(&helper));
-}
-
-// Tests the linkage of the Property matcher.
-TEST(LinkTest, TestMatcherProperty) {
-  FieldHelper helper(0);
-
-  Matcher<const FieldHelper&> m = Property(&FieldHelper::field, Eq(0));
-  EXPECT_TRUE(m.Matches(helper));
-
-  Matcher<const FieldHelper*> m2 = Property(&FieldHelper::field, Eq(0));
-  EXPECT_TRUE(m2.Matches(&helper));
-}
-
-// Tests the linkage of the ResultOf matcher.
-TEST(LinkTest, TestMatcherResultOf) {
-  Matcher<char*> m = ResultOf(&InvokeHelper::StaticIntFromString, Eq(1));
-  EXPECT_TRUE(m.Matches(nullptr));
-}
-
-// Tests the linkage of the ResultOf matcher.
-TEST(LinkTest, TestMatcherPointee) {
-  int n = 1;
-
-  Matcher<int*> m = Pointee(Eq(1));
-  EXPECT_TRUE(m.Matches(&n));
-}
-
-// Tests the linkage of the Truly matcher.
-TEST(LinkTest, TestMatcherTruly) {
-  Matcher<const char*> m = Truly(&InvokeHelper::StaticBoolFromString);
-  EXPECT_TRUE(m.Matches(nullptr));
-}
-
-// Tests the linkage of the AllOf matcher.
-TEST(LinkTest, TestMatcherAllOf) {
-  Matcher<int> m = AllOf(_, Eq(1));
-  EXPECT_TRUE(m.Matches(1));
-}
-
-// Tests the linkage of the AnyOf matcher.
-TEST(LinkTest, TestMatcherAnyOf) {
-  Matcher<int> m = AnyOf(_, Eq(1));
-  EXPECT_TRUE(m.Matches(1));
-}
-
-// Tests the linkage of the Not matcher.
-TEST(LinkTest, TestMatcherNot) {
-  Matcher<int> m = Not(_);
-  EXPECT_FALSE(m.Matches(1));
-}
-
-// Tests the linkage of the MatcherCast<T>() function.
-TEST(LinkTest, TestMatcherCast) {
-  Matcher<const char*> m = MatcherCast<const char*>(_);
-  EXPECT_TRUE(m.Matches(nullptr));
-}
-
-#endif  // GOOGLEMOCK_TEST_GMOCK_LINK_TEST_H_
diff --git a/third_party/googletest/googlemock/test/gmock_output_test.py b/third_party/googletest/googlemock/test/gmock_output_test.py
deleted file mode 100755
index 25f99f2..0000000
--- a/third_party/googletest/googlemock/test/gmock_output_test.py
+++ /dev/null
@@ -1,183 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-r"""Tests the text output of Google C++ Mocking Framework.
-
-To update the golden file:
-gmock_output_test.py --build_dir=BUILD/DIR --gengolden
-where BUILD/DIR contains the built gmock_output_test_ file.
-gmock_output_test.py --gengolden
-gmock_output_test.py
-
-"""
-
-from io import open    # pylint: disable=redefined-builtin, g-importing-member
-import os
-import re
-import sys
-import gmock_test_utils
-
-
-# The flag for generating the golden file
-GENGOLDEN_FLAG = '--gengolden'
-
-PROGRAM_PATH = gmock_test_utils.GetTestExecutablePath('gmock_output_test_')
-COMMAND = [PROGRAM_PATH, '--gtest_stack_trace_depth=0', '--gtest_print_time=0']
-GOLDEN_NAME = 'gmock_output_test_golden.txt'
-GOLDEN_PATH = os.path.join(gmock_test_utils.GetSourceDir(), GOLDEN_NAME)
-
-
-def ToUnixLineEnding(s):
-  """Changes all Windows/Mac line endings in s to UNIX line endings."""
-
-  return s.replace('\r\n', '\n').replace('\r', '\n')
-
-
-def RemoveReportHeaderAndFooter(output):
-  """Removes Google Test result report's header and footer from the output."""
-
-  output = re.sub(r'.*gtest_main.*\n', '', output)
-  output = re.sub(r'\[.*\d+ tests.*\n', '', output)
-  output = re.sub(r'\[.* test environment .*\n', '', output)
-  output = re.sub(r'\[=+\] \d+ tests .* ran.*', '', output)
-  output = re.sub(r'.* FAILED TESTS\n', '', output)
-  return output
-
-
-def RemoveLocations(output):
-  """Removes all file location info from a Google Test program's output.
-
-  Args:
-       output:  the output of a Google Test program.
-
-  Returns:
-       output with all file location info (in the form of
-       'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
-       'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
-       'FILE:#: '.
-  """
-
-  return re.sub(r'.*[/\\](.+)(\:\d+|\(\d+\))\:', 'FILE:#:', output)
-
-
-def NormalizeErrorMarker(output):
-  """Normalizes the error marker, which is different on Windows vs on Linux."""
-
-  return re.sub(r' error: ', ' Failure\n', output)
-
-
-def RemoveMemoryAddresses(output):
-  """Removes memory addresses from the test output."""
-
-  return re.sub(r'@\w+', '@0x#', output)
-
-
-def RemoveTestNamesOfLeakedMocks(output):
-  """Removes the test names of leaked mock objects from the test output."""
-
-  return re.sub(r'\(used in test .+\) ', '', output)
-
-
-def GetLeakyTests(output):
-  """Returns a list of test names that leak mock objects."""
-
-  # findall() returns a list of all matches of the regex in output.
-  # For example, if '(used in test FooTest.Bar)' is in output, the
-  # list will contain 'FooTest.Bar'.
-  return re.findall(r'\(used in test (.+)\)', output)
-
-
-def GetNormalizedOutputAndLeakyTests(output):
-  """Normalizes the output of gmock_output_test_.
-
-  Args:
-    output: The test output.
-
-  Returns:
-    A tuple (the normalized test output, the list of test names that have
-    leaked mocks).
-  """
-
-  output = ToUnixLineEnding(output)
-  output = RemoveReportHeaderAndFooter(output)
-  output = NormalizeErrorMarker(output)
-  output = RemoveLocations(output)
-  output = RemoveMemoryAddresses(output)
-  return (RemoveTestNamesOfLeakedMocks(output), GetLeakyTests(output))
-
-
-def GetShellCommandOutput(cmd):
-  """Runs a command in a sub-process, and returns its STDOUT in a string."""
-
-  return gmock_test_utils.Subprocess(cmd, capture_stderr=False).output
-
-
-def GetNormalizedCommandOutputAndLeakyTests(cmd):
-  """Runs a command and returns its normalized output and a list of leaky tests.
-
-  Args:
-    cmd:  the shell command.
-  """
-
-  # Disables exception pop-ups on Windows.
-  os.environ['GTEST_CATCH_EXCEPTIONS'] = '1'
-  return GetNormalizedOutputAndLeakyTests(GetShellCommandOutput(cmd))
-
-
-class GMockOutputTest(gmock_test_utils.TestCase):
-
-  def testOutput(self):
-    (output, leaky_tests) = GetNormalizedCommandOutputAndLeakyTests(COMMAND)
-    golden_file = open(GOLDEN_PATH, 'rb')
-    golden = golden_file.read().decode('utf-8')
-    golden_file.close()
-
-    # The normalized output should match the golden file.
-    self.assertEquals(golden, output)
-
-    # The raw output should contain 2 leaked mock object errors for
-    # test GMockOutputTest.CatchesLeakedMocks.
-    self.assertEquals(['GMockOutputTest.CatchesLeakedMocks',
-                       'GMockOutputTest.CatchesLeakedMocks'],
-                      leaky_tests)
-
-
-if __name__ == '__main__':
-  if sys.argv[1:] == [GENGOLDEN_FLAG]:
-    (output, _) = GetNormalizedCommandOutputAndLeakyTests(COMMAND)
-    golden_file = open(GOLDEN_PATH, 'wb')
-    golden_file.write(output)
-    golden_file.close()
-    # Suppress the error "googletest was imported but a call to its main()
-    # was never detected."
-    os._exit(0)
-  else:
-    gmock_test_utils.Main()
diff --git a/third_party/googletest/googlemock/test/gmock_output_test_.cc b/third_party/googletest/googlemock/test/gmock_output_test_.cc
deleted file mode 100644
index 3955c73..0000000
--- a/third_party/googletest/googlemock/test/gmock_output_test_.cc
+++ /dev/null
@@ -1,309 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Mock's output in various scenarios.  This ensures that
-// Google Mock's messages are readable and useful.
-
-#include "gmock/gmock.h"
-
-#include <stdio.h>
-#include <string>
-
-#include "gtest/gtest.h"
-
-// Silence C4100 (unreferenced formal parameter)
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-using testing::_;
-using testing::AnyNumber;
-using testing::Ge;
-using testing::InSequence;
-using testing::NaggyMock;
-using testing::Ref;
-using testing::Return;
-using testing::Sequence;
-using testing::Value;
-
-class MockFoo {
- public:
-  MockFoo() {}
-
-  MOCK_METHOD3(Bar, char(const std::string& s, int i, double x));
-  MOCK_METHOD2(Bar2, bool(int x, int y));
-  MOCK_METHOD2(Bar3, void(int x, int y));
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
-};
-
-class GMockOutputTest : public testing::Test {
- protected:
-  NaggyMock<MockFoo> foo_;
-};
-
-TEST_F(GMockOutputTest, ExpectedCall) {
-  testing::GMOCK_FLAG(verbose) = "info";
-
-  EXPECT_CALL(foo_, Bar2(0, _));
-  foo_.Bar2(0, 0);  // Expected call
-
-  testing::GMOCK_FLAG(verbose) = "warning";
-}
-
-TEST_F(GMockOutputTest, ExpectedCallToVoidFunction) {
-  testing::GMOCK_FLAG(verbose) = "info";
-
-  EXPECT_CALL(foo_, Bar3(0, _));
-  foo_.Bar3(0, 0);  // Expected call
-
-  testing::GMOCK_FLAG(verbose) = "warning";
-}
-
-TEST_F(GMockOutputTest, ExplicitActionsRunOut) {
-  EXPECT_CALL(foo_, Bar2(_, _))
-      .Times(2)
-      .WillOnce(Return(false));
-  foo_.Bar2(2, 2);
-  foo_.Bar2(1, 1);  // Explicit actions in EXPECT_CALL run out.
-}
-
-TEST_F(GMockOutputTest, UnexpectedCall) {
-  EXPECT_CALL(foo_, Bar2(0, _));
-
-  foo_.Bar2(1, 0);  // Unexpected call
-  foo_.Bar2(0, 0);  // Expected call
-}
-
-TEST_F(GMockOutputTest, UnexpectedCallToVoidFunction) {
-  EXPECT_CALL(foo_, Bar3(0, _));
-
-  foo_.Bar3(1, 0);  // Unexpected call
-  foo_.Bar3(0, 0);  // Expected call
-}
-
-TEST_F(GMockOutputTest, ExcessiveCall) {
-  EXPECT_CALL(foo_, Bar2(0, _));
-
-  foo_.Bar2(0, 0);  // Expected call
-  foo_.Bar2(0, 1);  // Excessive call
-}
-
-TEST_F(GMockOutputTest, ExcessiveCallToVoidFunction) {
-  EXPECT_CALL(foo_, Bar3(0, _));
-
-  foo_.Bar3(0, 0);  // Expected call
-  foo_.Bar3(0, 1);  // Excessive call
-}
-
-TEST_F(GMockOutputTest, UninterestingCall) {
-  foo_.Bar2(0, 1);  // Uninteresting call
-}
-
-TEST_F(GMockOutputTest, UninterestingCallToVoidFunction) {
-  foo_.Bar3(0, 1);  // Uninteresting call
-}
-
-TEST_F(GMockOutputTest, RetiredExpectation) {
-  EXPECT_CALL(foo_, Bar2(_, _))
-      .RetiresOnSaturation();
-  EXPECT_CALL(foo_, Bar2(0, 0));
-
-  foo_.Bar2(1, 1);
-  foo_.Bar2(1, 1);  // Matches a retired expectation
-  foo_.Bar2(0, 0);
-}
-
-TEST_F(GMockOutputTest, UnsatisfiedPrerequisite) {
-  {
-    InSequence s;
-    EXPECT_CALL(foo_, Bar(_, 0, _));
-    EXPECT_CALL(foo_, Bar2(0, 0));
-    EXPECT_CALL(foo_, Bar2(1, _));
-  }
-
-  foo_.Bar2(1, 0);  // Has one immediate unsatisfied pre-requisite
-  foo_.Bar("Hi", 0, 0);
-  foo_.Bar2(0, 0);
-  foo_.Bar2(1, 0);
-}
-
-TEST_F(GMockOutputTest, UnsatisfiedPrerequisites) {
-  Sequence s1, s2;
-
-  EXPECT_CALL(foo_, Bar(_, 0, _))
-      .InSequence(s1);
-  EXPECT_CALL(foo_, Bar2(0, 0))
-      .InSequence(s2);
-  EXPECT_CALL(foo_, Bar2(1, _))
-      .InSequence(s1, s2);
-
-  foo_.Bar2(1, 0);  // Has two immediate unsatisfied pre-requisites
-  foo_.Bar("Hi", 0, 0);
-  foo_.Bar2(0, 0);
-  foo_.Bar2(1, 0);
-}
-
-TEST_F(GMockOutputTest, UnsatisfiedWith) {
-  EXPECT_CALL(foo_, Bar2(_, _)).With(Ge());
-}
-
-TEST_F(GMockOutputTest, UnsatisfiedExpectation) {
-  EXPECT_CALL(foo_, Bar(_, _, _));
-  EXPECT_CALL(foo_, Bar2(0, _))
-      .Times(2);
-
-  foo_.Bar2(0, 1);
-}
-
-TEST_F(GMockOutputTest, MismatchArguments) {
-  const std::string s = "Hi";
-  EXPECT_CALL(foo_, Bar(Ref(s), _, Ge(0)));
-
-  foo_.Bar("Ho", 0, -0.1);  // Mismatch arguments
-  foo_.Bar(s, 0, 0);
-}
-
-TEST_F(GMockOutputTest, MismatchWith) {
-  EXPECT_CALL(foo_, Bar2(Ge(2), Ge(1)))
-      .With(Ge());
-
-  foo_.Bar2(2, 3);  // Mismatch With()
-  foo_.Bar2(2, 1);
-}
-
-TEST_F(GMockOutputTest, MismatchArgumentsAndWith) {
-  EXPECT_CALL(foo_, Bar2(Ge(2), Ge(1)))
-      .With(Ge());
-
-  foo_.Bar2(1, 3);  // Mismatch arguments and mismatch With()
-  foo_.Bar2(2, 1);
-}
-
-TEST_F(GMockOutputTest, UnexpectedCallWithDefaultAction) {
-  ON_CALL(foo_, Bar2(_, _))
-      .WillByDefault(Return(true));   // Default action #1
-  ON_CALL(foo_, Bar2(1, _))
-      .WillByDefault(Return(false));  // Default action #2
-
-  EXPECT_CALL(foo_, Bar2(2, 2));
-  foo_.Bar2(1, 0);  // Unexpected call, takes default action #2.
-  foo_.Bar2(0, 0);  // Unexpected call, takes default action #1.
-  foo_.Bar2(2, 2);  // Expected call.
-}
-
-TEST_F(GMockOutputTest, ExcessiveCallWithDefaultAction) {
-  ON_CALL(foo_, Bar2(_, _))
-      .WillByDefault(Return(true));   // Default action #1
-  ON_CALL(foo_, Bar2(1, _))
-      .WillByDefault(Return(false));  // Default action #2
-
-  EXPECT_CALL(foo_, Bar2(2, 2));
-  EXPECT_CALL(foo_, Bar2(1, 1));
-
-  foo_.Bar2(2, 2);  // Expected call.
-  foo_.Bar2(2, 2);  // Excessive call, takes default action #1.
-  foo_.Bar2(1, 1);  // Expected call.
-  foo_.Bar2(1, 1);  // Excessive call, takes default action #2.
-}
-
-TEST_F(GMockOutputTest, UninterestingCallWithDefaultAction) {
-  ON_CALL(foo_, Bar2(_, _))
-      .WillByDefault(Return(true));   // Default action #1
-  ON_CALL(foo_, Bar2(1, _))
-      .WillByDefault(Return(false));  // Default action #2
-
-  foo_.Bar2(2, 2);  // Uninteresting call, takes default action #1.
-  foo_.Bar2(1, 1);  // Uninteresting call, takes default action #2.
-}
-
-TEST_F(GMockOutputTest, ExplicitActionsRunOutWithDefaultAction) {
-  ON_CALL(foo_, Bar2(_, _))
-      .WillByDefault(Return(true));   // Default action #1
-
-  EXPECT_CALL(foo_, Bar2(_, _))
-      .Times(2)
-      .WillOnce(Return(false));
-  foo_.Bar2(2, 2);
-  foo_.Bar2(1, 1);  // Explicit actions in EXPECT_CALL run out.
-}
-
-TEST_F(GMockOutputTest, CatchesLeakedMocks) {
-  MockFoo* foo1 = new MockFoo;
-  MockFoo* foo2 = new MockFoo;
-
-  // Invokes ON_CALL on foo1.
-  ON_CALL(*foo1, Bar(_, _, _)).WillByDefault(Return('a'));
-
-  // Invokes EXPECT_CALL on foo2.
-  EXPECT_CALL(*foo2, Bar2(_, _));
-  EXPECT_CALL(*foo2, Bar2(1, _));
-  EXPECT_CALL(*foo2, Bar3(_, _)).Times(AnyNumber());
-  foo2->Bar2(2, 1);
-  foo2->Bar2(1, 1);
-
-  // Both foo1 and foo2 are deliberately leaked.
-}
-
-MATCHER_P2(IsPair, first, second, "") {
-  return Value(arg.first, first) && Value(arg.second, second);
-}
-
-TEST_F(GMockOutputTest, PrintsMatcher) {
-  const testing::Matcher<int> m1 = Ge(48);
-  EXPECT_THAT((std::pair<int, bool>(42, true)), IsPair(m1, true));
-}
-
-void TestCatchesLeakedMocksInAdHocTests() {
-  MockFoo* foo = new MockFoo;
-
-  // Invokes EXPECT_CALL on foo.
-  EXPECT_CALL(*foo, Bar2(_, _));
-  foo->Bar2(2, 1);
-
-  // foo is deliberately leaked.
-}
-
-int main(int argc, char **argv) {
-  testing::InitGoogleMock(&argc, argv);
-  // Ensures that the tests pass no matter what value of
-  // --gmock_catch_leaked_mocks and --gmock_verbose the user specifies.
-  testing::GMOCK_FLAG(catch_leaked_mocks) = true;
-  testing::GMOCK_FLAG(verbose) = "warning";
-
-  TestCatchesLeakedMocksInAdHocTests();
-  return RUN_ALL_TESTS();
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
diff --git a/third_party/googletest/googlemock/test/gmock_output_test_golden.txt b/third_party/googletest/googlemock/test/gmock_output_test_golden.txt
deleted file mode 100644
index 4846c12..0000000
--- a/third_party/googletest/googlemock/test/gmock_output_test_golden.txt
+++ /dev/null
@@ -1,317 +0,0 @@
-[ RUN      ] GMockOutputTest.ExpectedCall
-
-FILE:#: EXPECT_CALL(foo_, Bar2(0, _)) invoked
-Stack trace:
-
-FILE:#: Mock function call matches EXPECT_CALL(foo_, Bar2(0, _))...
-    Function call: Bar2(0, 0)
-          Returns: false
-Stack trace:
-[       OK ] GMockOutputTest.ExpectedCall
-[ RUN      ] GMockOutputTest.ExpectedCallToVoidFunction
-
-FILE:#: EXPECT_CALL(foo_, Bar3(0, _)) invoked
-Stack trace:
-
-FILE:#: Mock function call matches EXPECT_CALL(foo_, Bar3(0, _))...
-    Function call: Bar3(0, 0)
-Stack trace:
-[       OK ] GMockOutputTest.ExpectedCallToVoidFunction
-[ RUN      ] GMockOutputTest.ExplicitActionsRunOut
-
-GMOCK WARNING:
-FILE:#: Too few actions specified in EXPECT_CALL(foo_, Bar2(_, _))...
-Expected to be called twice, but has only 1 WillOnce().
-GMOCK WARNING:
-FILE:#: Actions ran out in EXPECT_CALL(foo_, Bar2(_, _))...
-Called 2 times, but only 1 WillOnce() is specified - returning default value.
-Stack trace:
-[       OK ] GMockOutputTest.ExplicitActionsRunOut
-[ RUN      ] GMockOutputTest.UnexpectedCall
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar2(1, 0)
-          Returns: false
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar2(0, _))...
-  Expected arg #0: is equal to 0
-           Actual: 1
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnexpectedCall
-[ RUN      ] GMockOutputTest.UnexpectedCallToVoidFunction
-unknown file: Failure
-
-Unexpected mock function call - returning directly.
-    Function call: Bar3(1, 0)
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar3(0, _))...
-  Expected arg #0: is equal to 0
-           Actual: 1
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnexpectedCallToVoidFunction
-[ RUN      ] GMockOutputTest.ExcessiveCall
-FILE:#: Failure
-Mock function called more times than expected - returning default value.
-    Function call: Bar2(0, 1)
-          Returns: false
-         Expected: to be called once
-           Actual: called twice - over-saturated and active
-[  FAILED  ] GMockOutputTest.ExcessiveCall
-[ RUN      ] GMockOutputTest.ExcessiveCallToVoidFunction
-FILE:#: Failure
-Mock function called more times than expected - returning directly.
-    Function call: Bar3(0, 1)
-         Expected: to be called once
-           Actual: called twice - over-saturated and active
-[  FAILED  ] GMockOutputTest.ExcessiveCallToVoidFunction
-[ RUN      ] GMockOutputTest.UninterestingCall
-
-GMOCK WARNING:
-Uninteresting mock function call - returning default value.
-    Function call: Bar2(0, 1)
-          Returns: false
-NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md#knowing-when-to-expect for details.
-[       OK ] GMockOutputTest.UninterestingCall
-[ RUN      ] GMockOutputTest.UninterestingCallToVoidFunction
-
-GMOCK WARNING:
-Uninteresting mock function call - returning directly.
-    Function call: Bar3(0, 1)
-NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md#knowing-when-to-expect for details.
-[       OK ] GMockOutputTest.UninterestingCallToVoidFunction
-[ RUN      ] GMockOutputTest.RetiredExpectation
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar2(1, 1)
-          Returns: false
-Google Mock tried the following 2 expectations, but none matched:
-
-FILE:#: tried expectation #0: EXPECT_CALL(foo_, Bar2(_, _))...
-         Expected: the expectation is active
-           Actual: it is retired
-         Expected: to be called once
-           Actual: called once - saturated and retired
-FILE:#: tried expectation #1: EXPECT_CALL(foo_, Bar2(0, 0))...
-  Expected arg #0: is equal to 0
-           Actual: 1
-  Expected arg #1: is equal to 0
-           Actual: 1
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.RetiredExpectation
-[ RUN      ] GMockOutputTest.UnsatisfiedPrerequisite
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar2(1, 0)
-          Returns: false
-Google Mock tried the following 2 expectations, but none matched:
-
-FILE:#: tried expectation #0: EXPECT_CALL(foo_, Bar2(0, 0))...
-  Expected arg #0: is equal to 0
-           Actual: 1
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-FILE:#: tried expectation #1: EXPECT_CALL(foo_, Bar2(1, _))...
-         Expected: all pre-requisites are satisfied
-           Actual: the following immediate pre-requisites are not satisfied:
-FILE:#: pre-requisite #0
-                   (end of pre-requisites)
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnsatisfiedPrerequisite
-[ RUN      ] GMockOutputTest.UnsatisfiedPrerequisites
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar2(1, 0)
-          Returns: false
-Google Mock tried the following 2 expectations, but none matched:
-
-FILE:#: tried expectation #0: EXPECT_CALL(foo_, Bar2(0, 0))...
-  Expected arg #0: is equal to 0
-           Actual: 1
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-FILE:#: tried expectation #1: EXPECT_CALL(foo_, Bar2(1, _))...
-         Expected: all pre-requisites are satisfied
-           Actual: the following immediate pre-requisites are not satisfied:
-FILE:#: pre-requisite #0
-FILE:#: pre-requisite #1
-                   (end of pre-requisites)
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnsatisfiedPrerequisites
-[ RUN      ] GMockOutputTest.UnsatisfiedWith
-FILE:#: Failure
-Actual function call count doesn't match EXPECT_CALL(foo_, Bar2(_, _))...
-    Expected args: are a pair where the first >= the second
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnsatisfiedWith
-[ RUN      ] GMockOutputTest.UnsatisfiedExpectation
-FILE:#: Failure
-Actual function call count doesn't match EXPECT_CALL(foo_, Bar2(0, _))...
-         Expected: to be called twice
-           Actual: called once - unsatisfied and active
-FILE:#: Failure
-Actual function call count doesn't match EXPECT_CALL(foo_, Bar(_, _, _))...
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnsatisfiedExpectation
-[ RUN      ] GMockOutputTest.MismatchArguments
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar(@0x# "Ho", 0, -0.1)
-          Returns: '\0'
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar(Ref(s), _, Ge(0)))...
-  Expected arg #0: references the variable @0x# "Hi"
-           Actual: "Ho", which is located @0x#
-  Expected arg #2: is >= 0
-           Actual: -0.1
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.MismatchArguments
-[ RUN      ] GMockOutputTest.MismatchWith
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar2(2, 3)
-          Returns: false
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar2(Ge(2), Ge(1)))...
-    Expected args: are a pair where the first >= the second
-           Actual: don't match
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.MismatchWith
-[ RUN      ] GMockOutputTest.MismatchArgumentsAndWith
-unknown file: Failure
-
-Unexpected mock function call - returning default value.
-    Function call: Bar2(1, 3)
-          Returns: false
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar2(Ge(2), Ge(1)))...
-  Expected arg #0: is >= 2
-           Actual: 1
-    Expected args: are a pair where the first >= the second
-           Actual: don't match
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.MismatchArgumentsAndWith
-[ RUN      ] GMockOutputTest.UnexpectedCallWithDefaultAction
-unknown file: Failure
-
-Unexpected mock function call - taking default action specified at:
-FILE:#:
-    Function call: Bar2(1, 0)
-          Returns: false
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar2(2, 2))...
-  Expected arg #0: is equal to 2
-           Actual: 1
-  Expected arg #1: is equal to 2
-           Actual: 0
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-unknown file: Failure
-
-Unexpected mock function call - taking default action specified at:
-FILE:#:
-    Function call: Bar2(0, 0)
-          Returns: true
-Google Mock tried the following 1 expectation, but it didn't match:
-
-FILE:#: EXPECT_CALL(foo_, Bar2(2, 2))...
-  Expected arg #0: is equal to 2
-           Actual: 0
-  Expected arg #1: is equal to 2
-           Actual: 0
-         Expected: to be called once
-           Actual: never called - unsatisfied and active
-[  FAILED  ] GMockOutputTest.UnexpectedCallWithDefaultAction
-[ RUN      ] GMockOutputTest.ExcessiveCallWithDefaultAction
-FILE:#: Failure
-Mock function called more times than expected - taking default action specified at:
-FILE:#:
-    Function call: Bar2(2, 2)
-          Returns: true
-         Expected: to be called once
-           Actual: called twice - over-saturated and active
-FILE:#: Failure
-Mock function called more times than expected - taking default action specified at:
-FILE:#:
-    Function call: Bar2(1, 1)
-          Returns: false
-         Expected: to be called once
-           Actual: called twice - over-saturated and active
-[  FAILED  ] GMockOutputTest.ExcessiveCallWithDefaultAction
-[ RUN      ] GMockOutputTest.UninterestingCallWithDefaultAction
-
-GMOCK WARNING:
-Uninteresting mock function call - taking default action specified at:
-FILE:#:
-    Function call: Bar2(2, 2)
-          Returns: true
-NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md#knowing-when-to-expect for details.
-
-GMOCK WARNING:
-Uninteresting mock function call - taking default action specified at:
-FILE:#:
-    Function call: Bar2(1, 1)
-          Returns: false
-NOTE: You can safely ignore the above warning unless this call should not happen.  Do not suppress it by blindly adding an EXPECT_CALL() if you don't mean to enforce the call.  See https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md#knowing-when-to-expect for details.
-[       OK ] GMockOutputTest.UninterestingCallWithDefaultAction
-[ RUN      ] GMockOutputTest.ExplicitActionsRunOutWithDefaultAction
-
-GMOCK WARNING:
-FILE:#: Too few actions specified in EXPECT_CALL(foo_, Bar2(_, _))...
-Expected to be called twice, but has only 1 WillOnce().
-GMOCK WARNING:
-FILE:#: Actions ran out in EXPECT_CALL(foo_, Bar2(_, _))...
-Called 2 times, but only 1 WillOnce() is specified - taking default action specified at:
-FILE:#:
-Stack trace:
-[       OK ] GMockOutputTest.ExplicitActionsRunOutWithDefaultAction
-[ RUN      ] GMockOutputTest.CatchesLeakedMocks
-[       OK ] GMockOutputTest.CatchesLeakedMocks
-[ RUN      ] GMockOutputTest.PrintsMatcher
-FILE:#: Failure
-Value of: (std::pair<int, bool>(42, true))
-Expected: is pair (is >= 48, true)
-  Actual: (42, true) (of type std::pair<int, bool>)
-[  FAILED  ] GMockOutputTest.PrintsMatcher
-[  FAILED  ] GMockOutputTest.UnexpectedCall
-[  FAILED  ] GMockOutputTest.UnexpectedCallToVoidFunction
-[  FAILED  ] GMockOutputTest.ExcessiveCall
-[  FAILED  ] GMockOutputTest.ExcessiveCallToVoidFunction
-[  FAILED  ] GMockOutputTest.RetiredExpectation
-[  FAILED  ] GMockOutputTest.UnsatisfiedPrerequisite
-[  FAILED  ] GMockOutputTest.UnsatisfiedPrerequisites
-[  FAILED  ] GMockOutputTest.UnsatisfiedWith
-[  FAILED  ] GMockOutputTest.UnsatisfiedExpectation
-[  FAILED  ] GMockOutputTest.MismatchArguments
-[  FAILED  ] GMockOutputTest.MismatchWith
-[  FAILED  ] GMockOutputTest.MismatchArgumentsAndWith
-[  FAILED  ] GMockOutputTest.UnexpectedCallWithDefaultAction
-[  FAILED  ] GMockOutputTest.ExcessiveCallWithDefaultAction
-[  FAILED  ] GMockOutputTest.PrintsMatcher
-
-
-FILE:#: ERROR: this mock object should be deleted but never is. Its address is @0x#.
-FILE:#: ERROR: this mock object should be deleted but never is. Its address is @0x#.
-FILE:#: ERROR: this mock object should be deleted but never is. Its address is @0x#.
-ERROR: 3 leaked mock objects found at program exit. Expectations on a mock object are verified when the object is destructed. Leaking a mock means that its expectations aren't verified, which is usually a test bug. If you really intend to leak a mock, you can suppress this error using testing::Mock::AllowLeak(mock_object), or you may use a fake or stub instead of a mock.
diff --git a/third_party/googletest/googlemock/test/gmock_stress_test.cc b/third_party/googletest/googlemock/test/gmock_stress_test.cc
deleted file mode 100644
index 20725d6..0000000
--- a/third_party/googletest/googlemock/test/gmock_stress_test.cc
+++ /dev/null
@@ -1,240 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests that Google Mock constructs can be used in a large number of
-// threads concurrently.
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace {
-
-// From gtest-port.h.
-using ::testing::internal::ThreadWithParam;
-
-// The maximum number of test threads (not including helper threads)
-// to create.
-const int kMaxTestThreads = 50;
-
-// How many times to repeat a task in a test thread.
-const int kRepeat = 50;
-
-class MockFoo {
- public:
-  MOCK_METHOD1(Bar, int(int n));  // NOLINT
-  MOCK_METHOD2(Baz, char(const char* s1, const std::string& s2));  // NOLINT
-};
-
-// Helper for waiting for the given thread to finish and then deleting it.
-template <typename T>
-void JoinAndDelete(ThreadWithParam<T>* t) {
-  t->Join();
-  delete t;
-}
-
-struct Dummy {};
-
-
-// Tests that different mock objects can be used in their respective
-// threads.  This should generate no Google Test failure.
-void TestConcurrentMockObjects(Dummy /* dummy */) {
-  // Creates a mock and does some typical operations on it.
-  MockFoo foo;
-  ON_CALL(foo, Bar(_))
-      .WillByDefault(Return(1));
-  ON_CALL(foo, Baz(_, _))
-      .WillByDefault(Return('b'));
-  ON_CALL(foo, Baz(_, "you"))
-      .WillByDefault(Return('a'));
-
-  EXPECT_CALL(foo, Bar(0))
-      .Times(AtMost(3));
-  EXPECT_CALL(foo, Baz(_, _));
-  EXPECT_CALL(foo, Baz("hi", "you"))
-      .WillOnce(Return('z'))
-      .WillRepeatedly(DoDefault());
-
-  EXPECT_EQ(1, foo.Bar(0));
-  EXPECT_EQ(1, foo.Bar(0));
-  EXPECT_EQ('z', foo.Baz("hi", "you"));
-  EXPECT_EQ('a', foo.Baz("hi", "you"));
-  EXPECT_EQ('b', foo.Baz("hi", "me"));
-}
-
-// Tests invoking methods of the same mock object in multiple threads.
-
-struct Helper1Param {
-  MockFoo* mock_foo;
-  int* count;
-};
-
-void Helper1(Helper1Param param) {
-  for (int i = 0; i < kRepeat; i++) {
-    const char ch = param.mock_foo->Baz("a", "b");
-    if (ch == 'a') {
-      // It was an expected call.
-      (*param.count)++;
-    } else {
-      // It was an excessive call.
-      EXPECT_EQ('\0', ch);
-    }
-
-    // An unexpected call.
-    EXPECT_EQ('\0', param.mock_foo->Baz("x", "y")) << "Expected failure.";
-
-    // An uninteresting call.
-    EXPECT_EQ(1, param.mock_foo->Bar(5));
-  }
-}
-
-// This should generate 3*kRepeat + 1 failures in total.
-void TestConcurrentCallsOnSameObject(Dummy /* dummy */) {
-  MockFoo foo;
-
-  ON_CALL(foo, Bar(_))
-      .WillByDefault(Return(1));
-  EXPECT_CALL(foo, Baz(_, "b"))
-      .Times(kRepeat)
-      .WillRepeatedly(Return('a'));
-  EXPECT_CALL(foo, Baz(_, "c"));  // Expected to be unsatisfied.
-
-  // This chunk of code should generate kRepeat failures about
-  // excessive calls, and 2*kRepeat failures about unexpected calls.
-  int count1 = 0;
-  const Helper1Param param = { &foo, &count1 };
-  ThreadWithParam<Helper1Param>* const t =
-      new ThreadWithParam<Helper1Param>(Helper1, param, nullptr);
-
-  int count2 = 0;
-  const Helper1Param param2 = { &foo, &count2 };
-  Helper1(param2);
-  JoinAndDelete(t);
-
-  EXPECT_EQ(kRepeat, count1 + count2);
-
-  // foo's destructor should generate one failure about unsatisfied
-  // expectation.
-}
-
-// Tests using the same mock object in multiple threads when the
-// expectations are partially ordered.
-
-void Helper2(MockFoo* foo) {
-  for (int i = 0; i < kRepeat; i++) {
-    foo->Bar(2);
-    foo->Bar(3);
-  }
-}
-
-// This should generate no Google Test failures.
-void TestPartiallyOrderedExpectationsWithThreads(Dummy /* dummy */) {
-  MockFoo foo;
-  Sequence s1, s2;
-
-  {
-    InSequence dummy;
-    EXPECT_CALL(foo, Bar(0));
-    EXPECT_CALL(foo, Bar(1))
-        .InSequence(s1, s2);
-  }
-
-  EXPECT_CALL(foo, Bar(2))
-      .Times(2*kRepeat)
-      .InSequence(s1)
-      .RetiresOnSaturation();
-  EXPECT_CALL(foo, Bar(3))
-      .Times(2*kRepeat)
-      .InSequence(s2);
-
-  {
-    InSequence dummy;
-    EXPECT_CALL(foo, Bar(2))
-        .InSequence(s1, s2);
-    EXPECT_CALL(foo, Bar(4));
-  }
-
-  foo.Bar(0);
-  foo.Bar(1);
-
-  ThreadWithParam<MockFoo*>* const t =
-      new ThreadWithParam<MockFoo*>(Helper2, &foo, nullptr);
-  Helper2(&foo);
-  JoinAndDelete(t);
-
-  foo.Bar(2);
-  foo.Bar(4);
-}
-
-// Tests using Google Mock constructs in many threads concurrently.
-TEST(StressTest, CanUseGMockWithThreads) {
-  void (*test_routines[])(Dummy dummy) = {
-    &TestConcurrentMockObjects,
-    &TestConcurrentCallsOnSameObject,
-    &TestPartiallyOrderedExpectationsWithThreads,
-  };
-
-  const int kRoutines = sizeof(test_routines)/sizeof(test_routines[0]);
-  const int kCopiesOfEachRoutine = kMaxTestThreads / kRoutines;
-  const int kTestThreads = kCopiesOfEachRoutine * kRoutines;
-  ThreadWithParam<Dummy>* threads[kTestThreads] = {};
-  for (int i = 0; i < kTestThreads; i++) {
-    // Creates a thread to run the test function.
-    threads[i] = new ThreadWithParam<Dummy>(test_routines[i % kRoutines],
-                                            Dummy(), nullptr);
-    GTEST_LOG_(INFO) << "Thread #" << i << " running . . .";
-  }
-
-  // At this point, we have many threads running.
-  for (int i = 0; i < kTestThreads; i++) {
-    JoinAndDelete(threads[i]);
-  }
-
-  // Ensures that the correct number of failures have been reported.
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult& result = *info->result();
-  const int kExpectedFailures = (3*kRepeat + 1)*kCopiesOfEachRoutine;
-  GTEST_CHECK_(kExpectedFailures == result.total_part_count())
-      << "Expected " << kExpectedFailures << " failures, but got "
-      << result.total_part_count();
-}
-
-}  // namespace
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  testing::InitGoogleMock(&argc, argv);
-
-  const int exit_code = RUN_ALL_TESTS();  // Expected to fail.
-  GTEST_CHECK_(exit_code != 0) << "RUN_ALL_TESTS() did not fail as expected";
-
-  printf("\nPASS\n");
-  return 0;
-}
diff --git a/third_party/googletest/googlemock/test/gmock_test.cc b/third_party/googletest/googlemock/test/gmock_test.cc
deleted file mode 100644
index e9840a3..0000000
--- a/third_party/googletest/googlemock/test/gmock_test.cc
+++ /dev/null
@@ -1,181 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests code in gmock.cc.
-
-#include "gmock/gmock.h"
-
-#include <string>
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-
-#if !defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-
-using testing::GMOCK_FLAG(default_mock_behavior);
-using testing::GMOCK_FLAG(verbose);
-using testing::InitGoogleMock;
-
-// Verifies that calling InitGoogleMock() on argv results in new_argv,
-// and the gmock_verbose flag's value is set to expected_gmock_verbose.
-template <typename Char, int M, int N>
-void TestInitGoogleMock(const Char* (&argv)[M], const Char* (&new_argv)[N],
-                        const ::std::string& expected_gmock_verbose) {
-  const ::std::string old_verbose = GMOCK_FLAG(verbose);
-
-  int argc = M - 1;
-  InitGoogleMock(&argc, const_cast<Char**>(argv));
-  ASSERT_EQ(N - 1, argc) << "The new argv has wrong number of elements.";
-
-  for (int i = 0; i < N; i++) {
-    EXPECT_STREQ(new_argv[i], argv[i]);
-  }
-
-  EXPECT_EQ(expected_gmock_verbose, GMOCK_FLAG(verbose).c_str());
-  GMOCK_FLAG(verbose) = old_verbose;  // Restores the gmock_verbose flag.
-}
-
-TEST(InitGoogleMockTest, ParsesInvalidCommandLine) {
-  const char* argv[] = {nullptr};
-
-  const char* new_argv[] = {nullptr};
-
-  TestInitGoogleMock(argv, new_argv, GMOCK_FLAG(verbose));
-}
-
-TEST(InitGoogleMockTest, ParsesEmptyCommandLine) {
-  const char* argv[] = {"foo.exe", nullptr};
-
-  const char* new_argv[] = {"foo.exe", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, GMOCK_FLAG(verbose));
-}
-
-TEST(InitGoogleMockTest, ParsesSingleFlag) {
-  const char* argv[] = {"foo.exe", "--gmock_verbose=info", nullptr};
-
-  const char* new_argv[] = {"foo.exe", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, "info");
-}
-
-TEST(InitGoogleMockTest, ParsesMultipleFlags) {
-  int old_default_behavior = GMOCK_FLAG(default_mock_behavior);
-  const wchar_t* argv[] = {L"foo.exe", L"--gmock_verbose=info",
-                           L"--gmock_default_mock_behavior=2", nullptr};
-
-  const wchar_t* new_argv[] = {L"foo.exe", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, "info");
-  EXPECT_EQ(2, GMOCK_FLAG(default_mock_behavior));
-  EXPECT_NE(2, old_default_behavior);
-  GMOCK_FLAG(default_mock_behavior) = old_default_behavior;
-}
-
-TEST(InitGoogleMockTest, ParsesUnrecognizedFlag) {
-  const char* argv[] = {"foo.exe", "--non_gmock_flag=blah", nullptr};
-
-  const char* new_argv[] = {"foo.exe", "--non_gmock_flag=blah", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, GMOCK_FLAG(verbose));
-}
-
-TEST(InitGoogleMockTest, ParsesGoogleMockFlagAndUnrecognizedFlag) {
-  const char* argv[] = {"foo.exe", "--non_gmock_flag=blah",
-                        "--gmock_verbose=error", nullptr};
-
-  const char* new_argv[] = {"foo.exe", "--non_gmock_flag=blah", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, "error");
-}
-
-TEST(WideInitGoogleMockTest, ParsesInvalidCommandLine) {
-  const wchar_t* argv[] = {nullptr};
-
-  const wchar_t* new_argv[] = {nullptr};
-
-  TestInitGoogleMock(argv, new_argv, GMOCK_FLAG(verbose));
-}
-
-TEST(WideInitGoogleMockTest, ParsesEmptyCommandLine) {
-  const wchar_t* argv[] = {L"foo.exe", nullptr};
-
-  const wchar_t* new_argv[] = {L"foo.exe", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, GMOCK_FLAG(verbose));
-}
-
-TEST(WideInitGoogleMockTest, ParsesSingleFlag) {
-  const wchar_t* argv[] = {L"foo.exe", L"--gmock_verbose=info", nullptr};
-
-  const wchar_t* new_argv[] = {L"foo.exe", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, "info");
-}
-
-TEST(WideInitGoogleMockTest, ParsesMultipleFlags) {
-  int old_default_behavior = GMOCK_FLAG(default_mock_behavior);
-  const wchar_t* argv[] = {L"foo.exe", L"--gmock_verbose=info",
-                           L"--gmock_default_mock_behavior=2", nullptr};
-
-  const wchar_t* new_argv[] = {L"foo.exe", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, "info");
-  EXPECT_EQ(2, GMOCK_FLAG(default_mock_behavior));
-  EXPECT_NE(2, old_default_behavior);
-  GMOCK_FLAG(default_mock_behavior) = old_default_behavior;
-}
-
-TEST(WideInitGoogleMockTest, ParsesUnrecognizedFlag) {
-  const wchar_t* argv[] = {L"foo.exe", L"--non_gmock_flag=blah", nullptr};
-
-  const wchar_t* new_argv[] = {L"foo.exe", L"--non_gmock_flag=blah", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, GMOCK_FLAG(verbose));
-}
-
-TEST(WideInitGoogleMockTest, ParsesGoogleMockFlagAndUnrecognizedFlag) {
-  const wchar_t* argv[] = {L"foo.exe", L"--non_gmock_flag=blah",
-                           L"--gmock_verbose=error", nullptr};
-
-  const wchar_t* new_argv[] = {L"foo.exe", L"--non_gmock_flag=blah", nullptr};
-
-  TestInitGoogleMock(argv, new_argv, "error");
-}
-
-#endif  // !defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-
-// Makes sure Google Mock flags can be accessed in code.
-TEST(FlagTest, IsAccessibleInCode) {
-  bool dummy = testing::GMOCK_FLAG(catch_leaked_mocks) &&
-      testing::GMOCK_FLAG(verbose) == "";
-  (void)dummy;  // Avoids the "unused local variable" warning.
-}
diff --git a/third_party/googletest/googlemock/test/gmock_test_utils.py b/third_party/googletest/googlemock/test/gmock_test_utils.py
deleted file mode 100755
index 7dc4e11..0000000
--- a/third_party/googletest/googlemock/test/gmock_test_utils.py
+++ /dev/null
@@ -1,108 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for Google C++ Mocking Framework."""
-
-import os
-import sys
-
-# Determines path to gtest_test_utils and imports it.
-SCRIPT_DIR = os.path.dirname(__file__) or '.'
-
-# isdir resolves symbolic links.
-gtest_tests_util_dir = os.path.join(SCRIPT_DIR, '../../googletest/test')
-if os.path.isdir(gtest_tests_util_dir):
-  GTEST_TESTS_UTIL_DIR = gtest_tests_util_dir
-else:
-  GTEST_TESTS_UTIL_DIR = os.path.join(SCRIPT_DIR, '../../googletest/test')
-sys.path.append(GTEST_TESTS_UTIL_DIR)
-
-# pylint: disable=C6204
-import gtest_test_utils
-
-
-def GetSourceDir():
-  """Returns the absolute path of the directory where the .py files are."""
-
-  return gtest_test_utils.GetSourceDir()
-
-
-def GetTestExecutablePath(executable_name):
-  """Returns the absolute path of the test binary given its name.
-
-  The function will print a message and abort the program if the resulting file
-  doesn't exist.
-
-  Args:
-    executable_name: name of the test binary that the test script runs.
-
-  Returns:
-    The absolute path of the test binary.
-  """
-
-  return gtest_test_utils.GetTestExecutablePath(executable_name)
-
-
-def GetExitStatus(exit_code):
-  """Returns the argument to exit(), or -1 if exit() wasn't called.
-
-  Args:
-    exit_code: the result value of os.system(command).
-  """
-
-  if os.name == 'nt':
-    # On Windows, os.WEXITSTATUS() doesn't work and os.system() returns
-    # the argument to exit() directly.
-    return exit_code
-  else:
-    # On Unix, os.WEXITSTATUS() must be used to extract the exit status
-    # from the result of os.system().
-    if os.WIFEXITED(exit_code):
-      return os.WEXITSTATUS(exit_code)
-    else:
-      return -1
-
-
-# Suppresses the "Invalid const name" lint complaint
-# pylint: disable-msg=C6409
-
-# Exposes utilities from gtest_test_utils.
-Subprocess = gtest_test_utils.Subprocess
-TestCase = gtest_test_utils.TestCase
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-PREMATURE_EXIT_FILE_ENV_VAR = gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR
-
-# pylint: enable-msg=C6409
-
-
-def Main():
-  """Runs the unit test."""
-
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest.patch b/third_party/googletest/googletest.patch
new file mode 100644
index 0000000..1658be4
--- /dev/null
+++ b/third_party/googletest/googletest.patch
@@ -0,0 +1,31 @@
+diff --git a/BUILD.bazel b/BUILD.bazel
+index ac62251e..de652e5e 100644
+--- a/BUILD.bazel
++++ b/BUILD.bazel
+@@ -101,7 +101,10 @@ cc_library(
+     copts = select({
+         ":qnx": [],
+         ":windows": [],
+-        "//conditions:default": ["-pthread"],
++        "//conditions:default": [
++            "-pthread",
++            "-Wno-unused-parameter",
++        ],
+     }),
+     defines = select({
+         ":has_absl": ["GTEST_HAS_ABSL=1"],
+diff --git a/googlemock/test/BUILD.bazel b/googlemock/test/BUILD.bazel
+index d4297c80..b13ea948 100644
+--- a/googlemock/test/BUILD.bazel
++++ b/googlemock/test/BUILD.bazel
+@@ -39,6 +39,10 @@ cc_test(
+     name = "gmock_all_test",
+     size = "small",
+     srcs = glob(include = ["gmock-*.cc"]) + ["gmock-matchers_test.h"],
++    copts = [
++        "-Wno-unused-parameter",
++        "-Wno-unused-function",
++    ],
+     linkopts = select({
+         "//:qnx": [],
+         "//:windows": [],
diff --git a/third_party/googletest/googletest/CMakeLists.txt b/third_party/googletest/googletest/CMakeLists.txt
deleted file mode 100644
index abdd98b..0000000
--- a/third_party/googletest/googletest/CMakeLists.txt
+++ /dev/null
@@ -1,323 +0,0 @@
-########################################################################
-# Note: CMake support is community-based. The maintainers do not use CMake
-# internally.
-#
-# CMake build script for Google Test.
-#
-# To run the tests for Google Test itself on Linux, use 'make test' or
-# ctest.  You can select which tests to run using 'ctest -R regex'.
-# For more options, run 'ctest --help'.
-
-# When other libraries are using a shared version of runtime libraries,
-# Google Test also has to use one.
-option(
-  gtest_force_shared_crt
-  "Use shared (DLL) run-time lib even when Google Test is built as static lib."
-  OFF)
-
-option(gtest_build_tests "Build all of gtest's own tests." OFF)
-
-option(gtest_build_samples "Build gtest's sample programs." OFF)
-
-option(gtest_disable_pthreads "Disable uses of pthreads in gtest." OFF)
-
-option(
-  gtest_hide_internal_symbols
-  "Build gtest with internal symbols hidden in shared libraries."
-  OFF)
-
-# Defines pre_project_set_up_hermetic_build() and set_up_hermetic_build().
-include(cmake/hermetic_build.cmake OPTIONAL)
-
-if (COMMAND pre_project_set_up_hermetic_build)
-  pre_project_set_up_hermetic_build()
-endif()
-
-########################################################################
-#
-# Project-wide settings
-
-# Name of the project.
-#
-# CMake files in this project can refer to the root source directory
-# as ${gtest_SOURCE_DIR} and to the root binary directory as
-# ${gtest_BINARY_DIR}.
-# Language "C" is required for find_package(Threads).
-
-# Project version:
-
-if (CMAKE_VERSION VERSION_LESS 3.0)
-  project(gtest CXX C)
-  set(PROJECT_VERSION ${GOOGLETEST_VERSION})
-else()
-  cmake_policy(SET CMP0048 NEW)
-  project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
-endif()
-cmake_minimum_required(VERSION 2.8.12)
-
-if (POLICY CMP0063) # Visibility
-  cmake_policy(SET CMP0063 NEW)
-endif (POLICY CMP0063)
-
-if (COMMAND set_up_hermetic_build)
-  set_up_hermetic_build()
-endif()
-
-# These commands only run if this is the main project
-if(CMAKE_PROJECT_NAME STREQUAL "gtest" OR CMAKE_PROJECT_NAME STREQUAL "googletest-distribution")
-
-  # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
-  # make it prominent in the GUI.
-  option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)
-
-else()
-
-  mark_as_advanced(
-    gtest_force_shared_crt
-    gtest_build_tests
-    gtest_build_samples
-    gtest_disable_pthreads
-    gtest_hide_internal_symbols)
-
-endif()
-
-
-if (gtest_hide_internal_symbols)
-  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
-  set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
-endif()
-
-# Define helper functions and macros used by Google Test.
-include(cmake/internal_utils.cmake)
-
-config_compiler_and_linker()  # Defined in internal_utils.cmake.
-
-# Needed to set the namespace for both the export targets and the
-# alias libraries
-set(cmake_package_name GTest CACHE INTERNAL "")
-
-# Create the CMake package file descriptors.
-if (INSTALL_GTEST)
-  include(CMakePackageConfigHelpers)
-  set(targets_export_name ${cmake_package_name}Targets CACHE INTERNAL "")
-  set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated" CACHE INTERNAL "")
-  set(cmake_files_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${cmake_package_name}")
-  set(version_file "${generated_dir}/${cmake_package_name}ConfigVersion.cmake")
-  write_basic_package_version_file(${version_file} VERSION ${GOOGLETEST_VERSION} COMPATIBILITY AnyNewerVersion)
-  install(EXPORT ${targets_export_name}
-    NAMESPACE ${cmake_package_name}::
-    DESTINATION ${cmake_files_install_dir})
-  set(config_file "${generated_dir}/${cmake_package_name}Config.cmake")
-  configure_package_config_file("${gtest_SOURCE_DIR}/cmake/Config.cmake.in"
-    "${config_file}" INSTALL_DESTINATION ${cmake_files_install_dir})
-  install(FILES ${version_file} ${config_file}
-    DESTINATION ${cmake_files_install_dir})
-endif()
-
-# Where Google Test's .h files can be found.
-set(gtest_build_include_dirs
-  "${gtest_SOURCE_DIR}/include"
-  "${gtest_SOURCE_DIR}")
-include_directories(${gtest_build_include_dirs})
-
-########################################################################
-#
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-
-# Google Test libraries.  We build them using more strict warnings than what
-# are used for other targets, to ensure that gtest can be compiled by a user
-# aggressive about warnings.
-cxx_library(gtest "${cxx_strict}" src/gtest-all.cc)
-set_target_properties(gtest PROPERTIES VERSION ${GOOGLETEST_VERSION})
-cxx_library(gtest_main "${cxx_strict}" src/gtest_main.cc)
-set_target_properties(gtest_main PROPERTIES VERSION ${GOOGLETEST_VERSION})
-# If the CMake version supports it, attach header directory information
-# to the targets for when we are part of a parent build (ie being pulled
-# in via add_subdirectory() rather than being a standalone build).
-if (DEFINED CMAKE_VERSION AND NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-  target_include_directories(gtest SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gtest_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-  target_include_directories(gtest_main SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gtest_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-endif()
-target_link_libraries(gtest_main PUBLIC gtest)
-
-########################################################################
-#
-# Install rules
-install_project(gtest gtest_main)
-
-########################################################################
-#
-# Samples on how to link user tests with gtest or gtest_main.
-#
-# They are not built by default.  To build them, set the
-# gtest_build_samples option to ON.  You can do it by running ccmake
-# or specifying the -Dgtest_build_samples=ON flag when running cmake.
-
-if (gtest_build_samples)
-  cxx_executable(sample1_unittest samples gtest_main samples/sample1.cc)
-  cxx_executable(sample2_unittest samples gtest_main samples/sample2.cc)
-  cxx_executable(sample3_unittest samples gtest_main)
-  cxx_executable(sample4_unittest samples gtest_main samples/sample4.cc)
-  cxx_executable(sample5_unittest samples gtest_main samples/sample1.cc)
-  cxx_executable(sample6_unittest samples gtest_main)
-  cxx_executable(sample7_unittest samples gtest_main)
-  cxx_executable(sample8_unittest samples gtest_main)
-  cxx_executable(sample9_unittest samples gtest)
-  cxx_executable(sample10_unittest samples gtest)
-endif()
-
-########################################################################
-#
-# Google Test's own tests.
-#
-# You can skip this section if you aren't interested in testing
-# Google Test itself.
-#
-# The tests are not built by default.  To build them, set the
-# gtest_build_tests option to ON.  You can do it by running ccmake
-# or specifying the -Dgtest_build_tests=ON flag when running cmake.
-
-if (gtest_build_tests)
-  # This must be set in the root directory for the tests to be run by
-  # 'make test' or ctest.
-  enable_testing()
-
-  ############################################################
-  # C++ tests built with standard compiler flags.
-
-  cxx_test(googletest-death-test-test gtest_main)
-  cxx_test(gtest_environment_test gtest)
-  cxx_test(googletest-filepath-test gtest_main)
-  cxx_test(googletest-listener-test gtest_main)
-  cxx_test(gtest_main_unittest gtest_main)
-  cxx_test(googletest-message-test gtest_main)
-  cxx_test(gtest_no_test_unittest gtest)
-  cxx_test(googletest-options-test gtest_main)
-  cxx_test(googletest-param-test-test gtest
-    test/googletest-param-test2-test.cc)
-  cxx_test(googletest-port-test gtest_main)
-  cxx_test(gtest_pred_impl_unittest gtest_main)
-  cxx_test(gtest_premature_exit_test gtest
-    test/gtest_premature_exit_test.cc)
-  cxx_test(googletest-printers-test gtest_main)
-  cxx_test(gtest_prod_test gtest_main
-    test/production.cc)
-  cxx_test(gtest_repeat_test gtest)
-  cxx_test(gtest_sole_header_test gtest_main)
-  cxx_test(gtest_stress_test gtest)
-  cxx_test(googletest-test-part-test gtest_main)
-  cxx_test(gtest_throw_on_failure_ex_test gtest)
-  cxx_test(gtest-typed-test_test gtest_main
-    test/gtest-typed-test2_test.cc)
-  cxx_test(gtest_unittest gtest_main)
-  cxx_test(gtest-unittest-api_test gtest)
-  cxx_test(gtest_skip_in_environment_setup_test gtest_main)
-  cxx_test(gtest_skip_test gtest_main)
-
-  ############################################################
-  # C++ tests built with non-standard compiler flags.
-
-  # MSVC 7.1 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)
-    cxx_library(gtest_no_exception "${cxx_no_exception}"
-      src/gtest-all.cc)
-    cxx_library(gtest_main_no_exception "${cxx_no_exception}"
-      src/gtest-all.cc src/gtest_main.cc)
-  endif()
-  cxx_library(gtest_main_no_rtti "${cxx_no_rtti}"
-    src/gtest-all.cc src/gtest_main.cc)
-
-  cxx_test_with_flags(gtest-death-test_ex_nocatch_test
-    "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=0"
-    gtest test/googletest-death-test_ex_test.cc)
-  cxx_test_with_flags(gtest-death-test_ex_catch_test
-    "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=1"
-    gtest test/googletest-death-test_ex_test.cc)
-
-  cxx_test_with_flags(gtest_no_rtti_unittest "${cxx_no_rtti}"
-    gtest_main_no_rtti test/gtest_unittest.cc)
-
-  cxx_shared_library(gtest_dll "${cxx_default}"
-    src/gtest-all.cc src/gtest_main.cc)
-
-  cxx_executable_with_flags(gtest_dll_test_ "${cxx_default}"
-    gtest_dll test/gtest_all_test.cc)
-  set_target_properties(gtest_dll_test_
-                        PROPERTIES
-                        COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-
-  ############################################################
-  # Python tests.
-
-  cxx_executable(googletest-break-on-failure-unittest_ test gtest)
-  py_test(googletest-break-on-failure-unittest)
-
-  py_test(gtest_skip_check_output_test)
-  py_test(gtest_skip_environment_check_output_test)
-
-  # Visual Studio .NET 2003 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)  # 1310 is Visual Studio .NET 2003
-    cxx_executable_with_flags(
-      googletest-catch-exceptions-no-ex-test_
-      "${cxx_no_exception}"
-      gtest_main_no_exception
-      test/googletest-catch-exceptions-test_.cc)
-  endif()
-
-  cxx_executable_with_flags(
-    googletest-catch-exceptions-ex-test_
-    "${cxx_exception}"
-    gtest_main
-    test/googletest-catch-exceptions-test_.cc)
-  py_test(googletest-catch-exceptions-test)
-
-  cxx_executable(googletest-color-test_ test gtest)
-  py_test(googletest-color-test)
-
-  cxx_executable(googletest-env-var-test_ test gtest)
-  py_test(googletest-env-var-test)
-
-  cxx_executable(googletest-filter-unittest_ test gtest)
-  py_test(googletest-filter-unittest)
-
-  cxx_executable(gtest_help_test_ test gtest_main)
-  py_test(gtest_help_test)
-
-  cxx_executable(googletest-list-tests-unittest_ test gtest)
-  py_test(googletest-list-tests-unittest)
-
-  cxx_executable(googletest-output-test_ test gtest)
-  py_test(googletest-output-test --no_stacktrace_support)
-
-  cxx_executable(googletest-shuffle-test_ test gtest)
-  py_test(googletest-shuffle-test)
-
-  # MSVC 7.1 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)
-    cxx_executable(googletest-throw-on-failure-test_ test gtest_no_exception)
-    set_target_properties(googletest-throw-on-failure-test_
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_no_exception}")
-    py_test(googletest-throw-on-failure-test)
-  endif()
-
-  cxx_executable(googletest-uninitialized-test_ test gtest)
-  py_test(googletest-uninitialized-test)
-
-  cxx_executable(gtest_list_output_unittest_ test gtest)
-  py_test(gtest_list_output_unittest)
-
-  cxx_executable(gtest_xml_outfile1_test_ test gtest_main)
-  cxx_executable(gtest_xml_outfile2_test_ test gtest_main)
-  py_test(gtest_xml_outfiles_test)
-  py_test(googletest-json-outfiles-test)
-
-  cxx_executable(gtest_xml_output_unittest_ test gtest)
-  py_test(gtest_xml_output_unittest --no_stacktrace_support)
-  py_test(googletest-json-output-unittest --no_stacktrace_support)
-endif()
diff --git a/third_party/googletest/googletest/README.md b/third_party/googletest/googletest/README.md
deleted file mode 100644
index 1f8b349..0000000
--- a/third_party/googletest/googletest/README.md
+++ /dev/null
@@ -1,215 +0,0 @@
-### Generic Build Instructions
-
-#### Setup
-
-To build GoogleTest and your tests that use it, you need to tell your build
-system where to find its headers and source files. The exact way to do it
-depends on which build system you use, and is usually straightforward.
-
-### Build with CMake
-
-GoogleTest comes with a CMake build script
-([CMakeLists.txt](https://github.com/google/googletest/blob/master/CMakeLists.txt))
-that can be used on a wide range of platforms ("C" stands for cross-platform.).
-If you don't have CMake installed already, you can download it for free from
-<http://www.cmake.org/>.
-
-CMake works by generating native makefiles or build projects that can be used in
-the compiler environment of your choice. You can either build GoogleTest as a
-standalone project or it can be incorporated into an existing CMake build for
-another project.
-
-#### Standalone CMake Project
-
-When building GoogleTest as a standalone project, the typical workflow starts
-with
-
-```
-git clone https://github.com/google/googletest.git -b release-1.10.0
-cd googletest        # Main directory of the cloned repository.
-mkdir build          # Create a directory to hold the build output.
-cd build
-cmake ..             # Generate native build scripts for GoogleTest.
-```
-
-The above command also includes GoogleMock by default. And so, if you want to
-build only GoogleTest, you should replace the last command with
-
-```
-cmake .. -DBUILD_GMOCK=OFF
-```
-
-If you are on a \*nix system, you should now see a Makefile in the current
-directory. Just type `make` to build GoogleTest. And then you can simply install
-GoogleTest if you are a system administrator.
-
-```
-make
-sudo make install    # Install in /usr/local/ by default
-```
-
-If you use Windows and have Visual Studio installed, a `gtest.sln` file and
-several `.vcproj` files will be created. You can then build them using Visual
-Studio.
-
-On Mac OS X with Xcode installed, a `.xcodeproj` file will be generated.
-
-#### Incorporating Into An Existing CMake Project
-
-If you want to use GoogleTest in a project which already uses CMake, the easiest
-way is to get installed libraries and headers.
-
-*   Import GoogleTest by using `find_package` (or `pkg_check_modules`). For
-    example, if `find_package(GTest CONFIG REQUIRED)` succeeds, you can use the
-    libraries as `GTest::gtest`, `GTest::gmock`.
-
-And a more robust and flexible approach is to build GoogleTest as part of that
-project directly. This is done by making the GoogleTest source code available to
-the main build and adding it using CMake's `add_subdirectory()` command. This
-has the significant advantage that the same compiler and linker settings are
-used between GoogleTest and the rest of your project, so issues associated with
-using incompatible libraries (eg debug/release), etc. are avoided. This is
-particularly useful on Windows. Making GoogleTest's source code available to the
-main build can be done a few different ways:
-
-*   Download the GoogleTest source code manually and place it at a known
-    location. This is the least flexible approach and can make it more difficult
-    to use with continuous integration systems, etc.
-*   Embed the GoogleTest source code as a direct copy in the main project's
-    source tree. This is often the simplest approach, but is also the hardest to
-    keep up to date. Some organizations may not permit this method.
-*   Add GoogleTest as a git submodule or equivalent. This may not always be
-    possible or appropriate. Git submodules, for example, have their own set of
-    advantages and drawbacks.
-*   Use CMake to download GoogleTest as part of the build's configure step. This
-    approach doesn't have the limitations of the other methods.
-
-The last of the above methods is implemented with a small piece of CMake code
-that downloads and pulls the GoogleTest code into the main build.
-
-Just add to your `CMakeLists.txt`:
-
-```cmake
-include(FetchContent)
-FetchContent_Declare(
-  googletest
-  # Specify the commit you depend on and update it regularly.
-  URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
-)
-# For Windows: Prevent overriding the parent project's compiler/linker settings
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-FetchContent_MakeAvailable(googletest)
-
-# Now simply link against gtest or gtest_main as needed. Eg
-add_executable(example example.cpp)
-target_link_libraries(example gtest_main)
-add_test(NAME example_test COMMAND example)
-```
-
-Note that this approach requires CMake 3.14 or later due to its use of the
-`FetchContent_MakeAvailable()` command.
-
-##### Visual Studio Dynamic vs Static Runtimes
-
-By default, new Visual Studio projects link the C runtimes dynamically but
-GoogleTest links them statically. This will generate an error that looks
-something like the following: gtest.lib(gtest-all.obj) : error LNK2038: mismatch
-detected for 'RuntimeLibrary': value 'MTd_StaticDebug' doesn't match value
-'MDd_DynamicDebug' in main.obj
-
-GoogleTest already has a CMake option for this: `gtest_force_shared_crt`
-
-Enabling this option will make gtest link the runtimes dynamically too, and
-match the project in which it is included.
-
-#### C++ Standard Version
-
-An environment that supports C++11 is required in order to successfully build
-GoogleTest. One way to ensure this is to specify the standard in the top-level
-project, for example by using the `set(CMAKE_CXX_STANDARD 11)` command. If this
-is not feasible, for example in a C project using GoogleTest for validation,
-then it can be specified by adding it to the options for cmake via the
-`DCMAKE_CXX_FLAGS` option.
-
-### Tweaking GoogleTest
-
-GoogleTest can be used in diverse environments. The default configuration may
-not work (or may not work well) out of the box in some environments. However,
-you can easily tweak GoogleTest by defining control macros on the compiler
-command line. Generally, these macros are named like `GTEST_XYZ` and you define
-them to either 1 or 0 to enable or disable a certain feature.
-
-We list the most frequently used macros below. For a complete list, see file
-[include/gtest/internal/gtest-port.h](https://github.com/google/googletest/blob/master/googletest/include/gtest/internal/gtest-port.h).
-
-### Multi-threaded Tests
-
-GoogleTest is thread-safe where the pthread library is available. After
-`#include "gtest/gtest.h"`, you can check the
-`GTEST_IS_THREADSAFE` macro to see whether this is the case (yes if the macro is
-`#defined` to 1, no if it's undefined.).
-
-If GoogleTest doesn't correctly detect whether pthread is available in your
-environment, you can force it with
-
-    -DGTEST_HAS_PTHREAD=1
-
-or
-
-    -DGTEST_HAS_PTHREAD=0
-
-When GoogleTest uses pthread, you may need to add flags to your compiler and/or
-linker to select the pthread library, or you'll get link errors. If you use the
-CMake script, this is taken care of for you. If you use your own build script,
-you'll need to read your compiler and linker's manual to figure out what flags
-to add.
-
-### As a Shared Library (DLL)
-
-GoogleTest is compact, so most users can build and link it as a static library
-for the simplicity. You can choose to use GoogleTest as a shared library (known
-as a DLL on Windows) if you prefer.
-
-To compile *gtest* as a shared library, add
-
-    -DGTEST_CREATE_SHARED_LIBRARY=1
-
-to the compiler flags. You'll also need to tell the linker to produce a shared
-library instead - consult your linker's manual for how to do it.
-
-To compile your *tests* that use the gtest shared library, add
-
-    -DGTEST_LINKED_AS_SHARED_LIBRARY=1
-
-to the compiler flags.
-
-Note: while the above steps aren't technically necessary today when using some
-compilers (e.g. GCC), they may become necessary in the future, if we decide to
-improve the speed of loading the library (see
-<http://gcc.gnu.org/wiki/Visibility> for details). Therefore you are recommended
-to always add the above flags when using GoogleTest as a shared library.
-Otherwise a future release of GoogleTest may break your build script.
-
-### Avoiding Macro Name Clashes
-
-In C++, macros don't obey namespaces. Therefore two libraries that both define a
-macro of the same name will clash if you `#include` both definitions. In case a
-GoogleTest macro clashes with another library, you can force GoogleTest to
-rename its macro to avoid the conflict.
-
-Specifically, if both GoogleTest and some other code define macro FOO, you can
-add
-
-    -DGTEST_DONT_DEFINE_FOO=1
-
-to the compiler flags to tell GoogleTest to change the macro's name from `FOO`
-to `GTEST_FOO`. Currently `FOO` can be `FAIL`, `SUCCEED`, or `TEST`. For
-example, with `-DGTEST_DONT_DEFINE_TEST=1`, you'll need to write
-
-    GTEST_TEST(SomeTest, DoesThis) { ... }
-
-instead of
-
-    TEST(SomeTest, DoesThis) { ... }
-
-in order to define a test.
diff --git a/third_party/googletest/googletest/cmake/Config.cmake.in b/third_party/googletest/googletest/cmake/Config.cmake.in
deleted file mode 100644
index 12be449..0000000
--- a/third_party/googletest/googletest/cmake/Config.cmake.in
+++ /dev/null
@@ -1,9 +0,0 @@
-@PACKAGE_INIT@
-include(CMakeFindDependencyMacro)
-if (@GTEST_HAS_PTHREAD@)
-  set(THREADS_PREFER_PTHREAD_FLAG @THREADS_PREFER_PTHREAD_FLAG@)
-  find_dependency(Threads)
-endif()
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
-check_required_components("@project_name@")
diff --git a/third_party/googletest/googletest/cmake/gtest.pc.in b/third_party/googletest/googletest/cmake/gtest.pc.in
deleted file mode 100644
index b4148fa..0000000
--- a/third_party/googletest/googletest/cmake/gtest.pc.in
+++ /dev/null
@@ -1,9 +0,0 @@
-libdir=@CMAKE_INSTALL_FULL_LIBDIR@
-includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
-
-Name: gtest
-Description: GoogleTest (without main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Libs: -L${libdir} -lgtest @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@
diff --git a/third_party/googletest/googletest/cmake/gtest_main.pc.in b/third_party/googletest/googletest/cmake/gtest_main.pc.in
deleted file mode 100644
index 38c88c5..0000000
--- a/third_party/googletest/googletest/cmake/gtest_main.pc.in
+++ /dev/null
@@ -1,10 +0,0 @@
-libdir=@CMAKE_INSTALL_FULL_LIBDIR@
-includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
-
-Name: gtest_main
-Description: GoogleTest (with main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Requires: gtest = @PROJECT_VERSION@
-Libs: -L${libdir} -lgtest_main @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@
diff --git a/third_party/googletest/googletest/cmake/internal_utils.cmake b/third_party/googletest/googletest/cmake/internal_utils.cmake
deleted file mode 100644
index 8d8d60a..0000000
--- a/third_party/googletest/googletest/cmake/internal_utils.cmake
+++ /dev/null
@@ -1,344 +0,0 @@
-# Defines functions and macros useful for building Google Test and
-# Google Mock.
-#
-# Note:
-#
-# - This file will be run twice when building Google Mock (once via
-#   Google Test's CMakeLists.txt, and once via Google Mock's).
-#   Therefore it shouldn't have any side effects other than defining
-#   the functions and macros.
-#
-# - The functions/macros defined in this file may depend on Google
-#   Test and Google Mock's option() definitions, and thus must be
-#   called *after* the options have been defined.
-
-if (POLICY CMP0054)
-  cmake_policy(SET CMP0054 NEW)
-endif (POLICY CMP0054)
-
-# Tweaks CMake's default compiler/linker settings to suit Google Test's needs.
-#
-# This must be a macro(), as inside a function string() can only
-# update variables in the function scope.
-macro(fix_default_compiler_settings_)
-  if (MSVC)
-    # For MSVC, CMake sets certain flags to defaults we want to override.
-    # This replacement code is taken from sample in the CMake Wiki at
-    # https://gitlab.kitware.com/cmake/community/wikis/FAQ#dynamic-replace.
-    foreach (flag_var
-             CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
-             CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
-             CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
-             CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
-      if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)
-        # When Google Test is built as a shared library, it should also use
-        # shared runtime libraries.  Otherwise, it may end up with multiple
-        # copies of runtime library data in different modules, resulting in
-        # hard-to-find crashes. When it is built as a static library, it is
-        # preferable to use CRT as static libraries, as we don't have to rely
-        # on CRT DLLs being available. CMake always defaults to using shared
-        # CRT libraries, so we override that default here.
-        string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")
-      endif()
-
-      # We prefer more strict warning checking for building Google Test.
-      # Replaces /W3 with /W4 in defaults.
-      string(REPLACE "/W3" "/W4" ${flag_var} "${${flag_var}}")
-
-      # Prevent D9025 warning for targets that have exception handling
-      # turned off (/EHs-c- flag). Where required, exceptions are explicitly
-      # re-enabled using the cxx_exception_flags variable.
-      string(REPLACE "/EHsc" "" ${flag_var} "${${flag_var}}")
-    endforeach()
-  endif()
-endmacro()
-
-# Defines the compiler/linker flags used to build Google Test and
-# Google Mock.  You can tweak these definitions to suit your need.  A
-# variable's value is empty before it's explicitly assigned to.
-macro(config_compiler_and_linker)
-  # Note: pthreads on MinGW is not supported, even if available
-  # instead, we use windows threading primitives
-  unset(GTEST_HAS_PTHREAD)
-  if (NOT gtest_disable_pthreads AND NOT MINGW)
-    # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
-    find_package(Threads)
-    if (CMAKE_USE_PTHREADS_INIT)
-      set(GTEST_HAS_PTHREAD ON)
-    endif()
-  endif()
-
-  fix_default_compiler_settings_()
-  if (MSVC)
-    # Newlines inside flags variables break CMake's NMake generator.
-    # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
-    set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J")
-    set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
-    set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
-    set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "-EHs-c- -D_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-GR-")
-    # Suppress "unreachable code" warning
-    # http://stackoverflow.com/questions/3232669 explains the issue.
-    set(cxx_base_flags "${cxx_base_flags} -wd4702")
-    # Ensure MSVC treats source files as UTF-8 encoded.
-    set(cxx_base_flags "${cxx_base_flags} -utf-8")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    set(cxx_base_flags "-Wall -Wshadow -Werror -Wconversion")
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    set(cxx_strict_flags "-W -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wunused-parameter -Wcast-align -Wchar-subscripts -Winline -Wredundant-decls")
-    set(cxx_no_rtti_flags "-fno-rtti")
-  elseif (CMAKE_COMPILER_IS_GNUCXX)
-    set(cxx_base_flags "-Wall -Wshadow -Werror")
-    if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0)
-      set(cxx_base_flags "${cxx_base_flags} -Wno-error=dangling-else")
-    endif()
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    # Until version 4.3.2, GCC doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
-    set(cxx_strict_flags
-      "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
-    set(cxx_exception_flags "-features=except")
-    # Sun Pro doesn't provide macros to indicate whether exceptions and
-    # RTTI are enabled, so we define GTEST_HAS_* explicitly.
-    set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
-      CMAKE_CXX_COMPILER_ID STREQUAL "XL")
-    # CMake 2.8 changes Visual Age's compiler ID to "XL".
-    set(cxx_exception_flags "-qeh")
-    set(cxx_no_exception_flags "-qnoeh")
-    # Until version 9.0, Visual Age doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
-    set(cxx_base_flags "-AA -mt")
-    set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
-    # RTTI can not be disabled in HP aCC compiler.
-    set(cxx_no_rtti_flags "")
-  endif()
-
-  # The pthreads library is available and allowed?
-  if (DEFINED GTEST_HAS_PTHREAD)
-    set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=1")
-  else()
-    set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=0")
-  endif()
-  set(cxx_base_flags "${cxx_base_flags} ${GTEST_HAS_PTHREAD_MACRO}")
-
-  # For building gtest's own tests and samples.
-  set(cxx_exception "${cxx_base_flags} ${cxx_exception_flags}")
-  set(cxx_no_exception
-    "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
-  set(cxx_default "${cxx_exception}")
-  set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
-
-  # For building the gtest libraries.
-  set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
-endmacro()
-
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-function(cxx_library_with_type name type cxx_flags)
-  # type can be either STATIC or SHARED to denote a static or shared library.
-  # ARGN refers to additional arguments after 'cxx_flags'.
-  add_library(${name} ${type} ${ARGN})
-  add_library(${cmake_package_name}::${name} ALIAS ${name})
-  set_target_properties(${name}
-    PROPERTIES
-    COMPILE_FLAGS "${cxx_flags}")
-  # Generate debug library name with a postfix.
-  set_target_properties(${name}
-    PROPERTIES
-    DEBUG_POSTFIX "d")
-  # Set the output directory for build artifacts
-  set_target_properties(${name}
-    PROPERTIES
-    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
-    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-    PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
-  # make PDBs match library name
-  get_target_property(pdb_debug_postfix ${name} DEBUG_POSTFIX)
-  set_target_properties(${name}
-    PROPERTIES
-    PDB_NAME "${name}"
-    PDB_NAME_DEBUG "${name}${pdb_debug_postfix}"
-    COMPILE_PDB_NAME "${name}"
-    COMPILE_PDB_NAME_DEBUG "${name}${pdb_debug_postfix}")
-
-  if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
-    if (NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-      target_compile_definitions(${name} INTERFACE
-        $<INSTALL_INTERFACE:GTEST_LINKED_AS_SHARED_LIBRARY=1>)
-    endif()
-  endif()
-  if (DEFINED GTEST_HAS_PTHREAD)
-    if ("${CMAKE_VERSION}" VERSION_LESS "3.1.0")
-      set(threads_spec ${CMAKE_THREAD_LIBS_INIT})
-    else()
-      set(threads_spec Threads::Threads)
-    endif()
-    target_link_libraries(${name} PUBLIC ${threads_spec})
-  endif()
-
-  if (NOT "${CMAKE_VERSION}" VERSION_LESS "3.8")
-    target_compile_features(${name} PUBLIC cxx_std_11)
-  endif()
-endfunction()
-
-########################################################################
-#
-# Helper functions for creating build targets.
-
-function(cxx_shared_library name cxx_flags)
-  cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
-endfunction()
-
-function(cxx_library name cxx_flags)
-  cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
-endfunction()
-
-# cxx_executable_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ executable that depends on the given libraries and
-# is built from the given source files with the given compiler flags.
-function(cxx_executable_with_flags name cxx_flags libs)
-  add_executable(${name} ${ARGN})
-  if (MSVC)
-    # BigObj required for tests.
-    set(cxx_flags "${cxx_flags} -bigobj")
-  endif()
-  if (cxx_flags)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_flags}")
-  endif()
-  if (BUILD_SHARED_LIBS)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-  endif()
-  # To support mixing linking in static and dynamic libraries, link each
-  # library in with an extra call to target_link_libraries.
-  foreach (lib "${libs}")
-    target_link_libraries(${name} ${lib})
-  endforeach()
-endfunction()
-
-# cxx_executable(name dir lib srcs...)
-#
-# creates a named target that depends on the given libs and is built
-# from the given source files.  dir/name.cc is implicitly included in
-# the source file list.
-function(cxx_executable name dir libs)
-  cxx_executable_with_flags(
-    ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
-endfunction()
-
-# Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
-if ("${CMAKE_VERSION}" VERSION_LESS "3.12.0")
-  find_package(PythonInterp)
-else()
-  find_package(Python COMPONENTS Interpreter)
-  set(PYTHONINTERP_FOUND ${Python_Interpreter_FOUND})
-  set(PYTHON_EXECUTABLE ${Python_EXECUTABLE})
-endif()
-
-# cxx_test_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ test that depends on the given libs and is built
-# from the given source files with the given compiler flags.
-function(cxx_test_with_flags name cxx_flags libs)
-  cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
-    add_test(NAME ${name} COMMAND "$<TARGET_FILE:${name}>")
-endfunction()
-
-# cxx_test(name libs srcs...)
-#
-# creates a named test target that depends on the given libs and is
-# built from the given source files.  Unlike cxx_test_with_flags,
-# test/name.cc is already implicitly included in the source file list.
-function(cxx_test name libs)
-  cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
-    "test/${name}.cc" ${ARGN})
-endfunction()
-
-# py_test(name)
-#
-# creates a Python test with the given name whose main module is in
-# test/name.py.  It does nothing if Python is not installed.
-function(py_test name)
-  if (PYTHONINTERP_FOUND)
-    if ("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_GREATER 3.1)
-      if (CMAKE_CONFIGURATION_TYPES)
-        # Multi-configuration build generators as for Visual Studio save
-        # output in a subdirectory of CMAKE_CURRENT_BINARY_DIR (Debug,
-        # Release etc.), so we have to provide it here.
-        add_test(NAME ${name}
-          COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG> ${ARGN})
-      else (CMAKE_CONFIGURATION_TYPES)
-        # Single-configuration build generators like Makefile generators
-        # don't have subdirs below CMAKE_CURRENT_BINARY_DIR.
-        add_test(NAME ${name}
-          COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-            --build_dir=${CMAKE_CURRENT_BINARY_DIR} ${ARGN})
-      endif (CMAKE_CONFIGURATION_TYPES)
-    else()
-      # ${CMAKE_CURRENT_BINARY_DIR} is known at configuration time, so we can
-      # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
-      # only at ctest runtime (by calling ctest -c <Configuration>), so
-      # we have to escape $ to delay variable substitution here.
-      add_test(NAME ${name}
-        COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-          --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE} ${ARGN})
-    endif()
-  endif(PYTHONINTERP_FOUND)
-endfunction()
-
-# install_project(targets...)
-#
-# Installs the specified targets and configures the associated pkgconfig files.
-function(install_project)
-  if(INSTALL_GTEST)
-    install(DIRECTORY "${PROJECT_SOURCE_DIR}/include/"
-      DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
-    # Install the project targets.
-    install(TARGETS ${ARGN}
-      EXPORT ${targets_export_name}
-      RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
-      ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
-      LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
-    if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-      # Install PDBs
-      foreach(t ${ARGN})
-        get_target_property(t_pdb_name ${t} COMPILE_PDB_NAME)
-        get_target_property(t_pdb_name_debug ${t} COMPILE_PDB_NAME_DEBUG)
-        get_target_property(t_pdb_output_directory ${t} PDB_OUTPUT_DIRECTORY)
-        install(FILES
-          "${t_pdb_output_directory}/\${CMAKE_INSTALL_CONFIG_NAME}/$<$<CONFIG:Debug>:${t_pdb_name_debug}>$<$<NOT:$<CONFIG:Debug>>:${t_pdb_name}>.pdb"
-          DESTINATION ${CMAKE_INSTALL_LIBDIR}
-          OPTIONAL)
-      endforeach()
-    endif()
-    # Configure and install pkgconfig files.
-    foreach(t ${ARGN})
-      set(configured_pc "${generated_dir}/${t}.pc")
-      configure_file("${PROJECT_SOURCE_DIR}/cmake/${t}.pc.in"
-        "${configured_pc}" @ONLY)
-      install(FILES "${configured_pc}"
-        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-    endforeach()
-  endif()
-endfunction()
diff --git a/third_party/googletest/googletest/cmake/libgtest.la.in b/third_party/googletest/googletest/cmake/libgtest.la.in
deleted file mode 100644
index 840c838..0000000
--- a/third_party/googletest/googletest/cmake/libgtest.la.in
+++ /dev/null
@@ -1,21 +0,0 @@
-# libgtest.la - a libtool library file
-# Generated by libtool (GNU libtool) 2.4.6
-
-# Please DO NOT delete this file!
-# It is necessary for linking the library.
-
-# Names of this library.
-library_names='libgtest.so'
-
-# Is this an already installed library?
-installed=yes
-
-# Should we warn about portability when linking against -modules?
-shouldnotlink=no
-
-# Files to dlopen/dlpreopen
-dlopen=''
-dlpreopen=''
-
-# Directory that this library needs to be installed in:
-libdir='@CMAKE_INSTALL_FULL_LIBDIR@'
diff --git a/third_party/googletest/googletest/docs/README.md b/third_party/googletest/googletest/docs/README.md
deleted file mode 100644
index 1bc57b7..0000000
--- a/third_party/googletest/googletest/docs/README.md
+++ /dev/null
@@ -1,4 +0,0 @@
-# Content Moved
-
-We are working on updates to the GoogleTest documentation, which has moved to
-the top-level [docs](../../docs) directory.
diff --git a/third_party/googletest/googletest/include/gtest/gtest-death-test.h b/third_party/googletest/googletest/include/gtest/gtest-death-test.h
deleted file mode 100644
index adfb192..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-death-test.h
+++ /dev/null
@@ -1,342 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for death tests.  It is
-// #included by gtest.h so a user doesn't need to include this
-// directly.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-
-#include "gtest/internal/gtest-death-test-internal.h"
-
-namespace testing {
-
-// This flag controls the style of death tests.  Valid values are "threadsafe",
-// meaning that the death test child process will re-execute the test binary
-// from the start, running only a single death test, or "fast",
-// meaning that the child process will execute the test logic immediately
-// after forking.
-GTEST_DECLARE_string_(death_test_style);
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-GTEST_API_ bool InDeathTestChild();
-
-}  // namespace internal
-
-// The following macros are useful for writing death tests.
-
-// Here's what happens when an ASSERT_DEATH* or EXPECT_DEATH* is
-// executed:
-//
-//   1. It generates a warning if there is more than one active
-//   thread.  This is because it's safe to fork() or clone() only
-//   when there is a single thread.
-//
-//   2. The parent process clone()s a sub-process and runs the death
-//   test in it; the sub-process exits with code 0 at the end of the
-//   death test, if it hasn't exited already.
-//
-//   3. The parent process waits for the sub-process to terminate.
-//
-//   4. The parent process checks the exit code and error message of
-//   the sub-process.
-//
-// Examples:
-//
-//   ASSERT_DEATH(server.SendMessage(56, "Hello"), "Invalid port number");
-//   for (int i = 0; i < 5; i++) {
-//     EXPECT_DEATH(server.ProcessRequest(i),
-//                  "Invalid request .* in ProcessRequest()")
-//                  << "Failed to die on request " << i;
-//   }
-//
-//   ASSERT_EXIT(server.ExitNow(), ::testing::ExitedWithCode(0), "Exiting");
-//
-//   bool KilledBySIGHUP(int exit_code) {
-//     return WIFSIGNALED(exit_code) && WTERMSIG(exit_code) == SIGHUP;
-//   }
-//
-//   ASSERT_EXIT(client.HangUpServer(), KilledBySIGHUP, "Hanging up!");
-//
-// On the regular expressions used in death tests:
-//
-//   GOOGLETEST_CM0005 DO NOT DELETE
-//   On POSIX-compliant systems (*nix), we use the <regex.h> library,
-//   which uses the POSIX extended regex syntax.
-//
-//   On other platforms (e.g. Windows or Mac), we only support a simple regex
-//   syntax implemented as part of Google Test.  This limited
-//   implementation should be enough most of the time when writing
-//   death tests; though it lacks many features you can find in PCRE
-//   or POSIX extended regex syntax.  For example, we don't support
-//   union ("x|y"), grouping ("(xy)"), brackets ("[xy]"), and
-//   repetition count ("x{5,7}"), among others.
-//
-//   Below is the syntax that we do support.  We chose it to be a
-//   subset of both PCRE and POSIX extended regex, so it's easy to
-//   learn wherever you come from.  In the following: 'A' denotes a
-//   literal character, period (.), or a single \\ escape sequence;
-//   'x' and 'y' denote regular expressions; 'm' and 'n' are for
-//   natural numbers.
-//
-//     c     matches any literal character c
-//     \\d   matches any decimal digit
-//     \\D   matches any character that's not a decimal digit
-//     \\f   matches \f
-//     \\n   matches \n
-//     \\r   matches \r
-//     \\s   matches any ASCII whitespace, including \n
-//     \\S   matches any character that's not a whitespace
-//     \\t   matches \t
-//     \\v   matches \v
-//     \\w   matches any letter, _, or decimal digit
-//     \\W   matches any character that \\w doesn't match
-//     \\c   matches any literal character c, which must be a punctuation
-//     .     matches any single character except \n
-//     A?    matches 0 or 1 occurrences of A
-//     A*    matches 0 or many occurrences of A
-//     A+    matches 1 or many occurrences of A
-//     ^     matches the beginning of a string (not that of each line)
-//     $     matches the end of a string (not that of each line)
-//     xy    matches x followed by y
-//
-//   If you accidentally use PCRE or POSIX extended regex features
-//   not implemented by us, you will get a run-time failure.  In that
-//   case, please try to rewrite your regular expression within the
-//   above syntax.
-//
-//   This implementation is *not* meant to be as highly tuned or robust
-//   as a compiled regex library, but should perform well enough for a
-//   death test, which already incurs significant overhead by launching
-//   a child process.
-//
-// Known caveats:
-//
-//   A "threadsafe" style death test obtains the path to the test
-//   program from argv[0] and re-executes it in the sub-process.  For
-//   simplicity, the current implementation doesn't search the PATH
-//   when launching the sub-process.  This means that the user must
-//   invoke the test program via a path that contains at least one
-//   path separator (e.g. path/to/foo_test and
-//   /absolute/path/to/bar_test are fine, but foo_test is not).  This
-//   is rarely a problem as people usually don't put the test binary
-//   directory in PATH.
-//
-
-// Asserts that a given statement causes the program to exit, with an
-// integer exit status that satisfies predicate, and emitting error output
-// that matches regex.
-# define ASSERT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_FATAL_FAILURE_)
-
-// Like ASSERT_EXIT, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_NONFATAL_FAILURE_)
-
-// Asserts that a given statement causes the program to exit, either by
-// explicitly exiting with a nonzero exit code or being killed by a
-// signal, and emitting error output that matches regex.
-# define ASSERT_DEATH(statement, regex) \
-    ASSERT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Like ASSERT_DEATH, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_DEATH(statement, regex) \
-    EXPECT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Two predicate classes that can be used in {ASSERT,EXPECT}_EXIT*:
-
-// Tests that an exit code describes a normal exit with a given exit code.
-class GTEST_API_ ExitedWithCode {
- public:
-  explicit ExitedWithCode(int exit_code);
-  ExitedWithCode(const ExitedWithCode&) = default;
-  void operator=(const ExitedWithCode& other) = delete;
-  bool operator()(int exit_status) const;
- private:
-  const int exit_code_;
-};
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Tests that an exit code describes an exit due to termination by a
-// given signal.
-// GOOGLETEST_CM0006 DO NOT DELETE
-class GTEST_API_ KilledBySignal {
- public:
-  explicit KilledBySignal(int signum);
-  bool operator()(int exit_status) const;
- private:
-  const int signum_;
-};
-# endif  // !GTEST_OS_WINDOWS
-
-// EXPECT_DEBUG_DEATH asserts that the given statements die in debug mode.
-// The death testing framework causes this to have interesting semantics,
-// since the sideeffects of the call are only visible in opt mode, and not
-// in debug mode.
-//
-// In practice, this can be used to test functions that utilize the
-// LOG(DFATAL) macro using the following style:
-//
-// int DieInDebugOr12(int* sideeffect) {
-//   if (sideeffect) {
-//     *sideeffect = 12;
-//   }
-//   LOG(DFATAL) << "death";
-//   return 12;
-// }
-//
-// TEST(TestSuite, TestDieOr12WorksInDgbAndOpt) {
-//   int sideeffect = 0;
-//   // Only asserts in dbg.
-//   EXPECT_DEBUG_DEATH(DieInDebugOr12(&sideeffect), "death");
-//
-// #ifdef NDEBUG
-//   // opt-mode has sideeffect visible.
-//   EXPECT_EQ(12, sideeffect);
-// #else
-//   // dbg-mode no visible sideeffect.
-//   EXPECT_EQ(0, sideeffect);
-// #endif
-// }
-//
-// This will assert that DieInDebugReturn12InOpt() crashes in debug
-// mode, usually due to a DCHECK or LOG(DFATAL), but returns the
-// appropriate fallback value (12 in this case) in opt mode. If you
-// need to test that a function has appropriate side-effects in opt
-// mode, include assertions against the side-effects.  A general
-// pattern for this is:
-//
-// EXPECT_DEBUG_DEATH({
-//   // Side-effects here will have an effect after this statement in
-//   // opt mode, but none in debug mode.
-//   EXPECT_EQ(12, DieInDebugOr12(&sideeffect));
-// }, "death");
-//
-# ifdef NDEBUG
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-# else
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  EXPECT_DEATH(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  ASSERT_DEATH(statement, regex)
-
-# endif  // NDEBUG for EXPECT_DEBUG_DEATH
-#endif  // GTEST_HAS_DEATH_TEST
-
-// This macro is used for implementing macros such as
-// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
-// death tests are not supported. Those macros must compile on such systems
-// if and only if EXPECT_DEATH and ASSERT_DEATH compile with the same parameters
-// on systems that support death tests. This allows one to write such a macro on
-// a system that does not support death tests and be sure that it will compile
-// on a death-test supporting system. It is exposed publicly so that systems
-// that have death-tests with stricter requirements than GTEST_HAS_DEATH_TEST
-// can write their own equivalent of EXPECT_DEATH_IF_SUPPORTED and
-// ASSERT_DEATH_IF_SUPPORTED.
-//
-// Parameters:
-//   statement -  A statement that a macro such as EXPECT_DEATH would test
-//                for program termination. This macro has to make sure this
-//                statement is compiled but not executed, to ensure that
-//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
-//                parameter if and only if EXPECT_DEATH compiles with it.
-//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
-//                the output of statement.  This parameter has to be
-//                compiled but not evaluated by this macro, to ensure that
-//                this macro only accepts expressions that a macro such as
-//                EXPECT_DEATH would accept.
-//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
-//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
-//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
-//                compile inside functions where ASSERT_DEATH doesn't
-//                compile.
-//
-//  The branch that has an always false condition is used to ensure that
-//  statement and regex are compiled (and thus syntactically correct) but
-//  never executed. The unreachable code macro protects the terminator
-//  statement from generating an 'unreachable code' warning in case
-//  statement unconditionally returns or throws. The Message constructor at
-//  the end allows the syntax of streaming additional messages into the
-//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
-# define GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, terminator) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::AlwaysTrue()) { \
-      GTEST_LOG_(WARNING) \
-          << "Death tests are not supported on this platform.\n" \
-          << "Statement '" #statement "' cannot be verified."; \
-    } else if (::testing::internal::AlwaysFalse()) { \
-      ::testing::internal::RE::PartialMatch(".*", (regex)); \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-      terminator; \
-    } else \
-      ::testing::Message()
-
-// EXPECT_DEATH_IF_SUPPORTED(statement, regex) and
-// ASSERT_DEATH_IF_SUPPORTED(statement, regex) expand to real death tests if
-// death tests are supported; otherwise they just issue a warning.  This is
-// useful when you are combining death test assertions with normal test
-// assertions in one test.
-#if GTEST_HAS_DEATH_TEST
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    EXPECT_DEATH(statement, regex)
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    ASSERT_DEATH(statement, regex)
-#else
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, )
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, return)
-#endif
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-matchers.h b/third_party/googletest/googletest/include/gtest/gtest-matchers.h
deleted file mode 100644
index 2bd3dcf..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-matchers.h
+++ /dev/null
@@ -1,930 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-
-#include <atomic>
-#include <memory>
-#include <ostream>
-#include <string>
-#include <type_traits>
-
-#include "gtest/gtest-printers.h"
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-
-// MSVC warning C5046 is new as of VS2017 version 15.8.
-#if defined(_MSC_VER) && _MSC_VER >= 1915
-#define GTEST_MAYBE_5046_ 5046
-#else
-#define GTEST_MAYBE_5046_
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(
-    4251 GTEST_MAYBE_5046_ /* class A needs to have dll-interface to be used by
-                              clients of class B */
-    /* Symbol involving type with internal linkage not defined */)
-
-namespace testing {
-
-// To implement a matcher Foo for type T, define:
-//   1. a class FooMatcherMatcher that implements the matcher interface:
-//     using is_gtest_matcher = void;
-//     bool MatchAndExplain(const T&, std::ostream*);
-//       (MatchResultListener* can also be used instead of std::ostream*)
-//     void DescribeTo(std::ostream*);
-//     void DescribeNegationTo(std::ostream*);
-//
-//   2. a factory function that creates a Matcher<T> object from a
-//      FooMatcherMatcher.
-
-class MatchResultListener {
- public:
-  // Creates a listener object with the given underlying ostream.  The
-  // listener does not own the ostream, and does not dereference it
-  // in the constructor or destructor.
-  explicit MatchResultListener(::std::ostream* os) : stream_(os) {}
-  virtual ~MatchResultListener() = 0;  // Makes this class abstract.
-
-  // Streams x to the underlying ostream; does nothing if the ostream
-  // is NULL.
-  template <typename T>
-  MatchResultListener& operator<<(const T& x) {
-    if (stream_ != nullptr) *stream_ << x;
-    return *this;
-  }
-
-  // Returns the underlying ostream.
-  ::std::ostream* stream() { return stream_; }
-
-  // Returns true if and only if the listener is interested in an explanation
-  // of the match result.  A matcher's MatchAndExplain() method can use
-  // this information to avoid generating the explanation when no one
-  // intends to hear it.
-  bool IsInterested() const { return stream_ != nullptr; }
-
- private:
-  ::std::ostream* const stream_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatchResultListener);
-};
-
-inline MatchResultListener::~MatchResultListener() {
-}
-
-// An instance of a subclass of this knows how to describe itself as a
-// matcher.
-class MatcherDescriberInterface {
- public:
-  virtual ~MatcherDescriberInterface() {}
-
-  // Describes this matcher to an ostream.  The function should print
-  // a verb phrase that describes the property a value matching this
-  // matcher should have.  The subject of the verb phrase is the value
-  // being matched.  For example, the DescribeTo() method of the Gt(7)
-  // matcher prints "is greater than 7".
-  virtual void DescribeTo(::std::ostream* os) const = 0;
-
-  // Describes the negation of this matcher to an ostream.  For
-  // example, if the description of this matcher is "is greater than
-  // 7", the negated description could be "is not greater than 7".
-  // You are not required to override this when implementing
-  // MatcherInterface, but it is highly advised so that your matcher
-  // can produce good error messages.
-  virtual void DescribeNegationTo(::std::ostream* os) const {
-    *os << "not (";
-    DescribeTo(os);
-    *os << ")";
-  }
-};
-
-// The implementation of a matcher.
-template <typename T>
-class MatcherInterface : public MatcherDescriberInterface {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener' if necessary (see the next paragraph), in
-  // the form of a non-restrictive relative clause ("which ...",
-  // "whose ...", etc) that describes x.  For example, the
-  // MatchAndExplain() method of the Pointee(...) matcher should
-  // generate an explanation like "which points to ...".
-  //
-  // Implementations of MatchAndExplain() should add an explanation of
-  // the match result *if and only if* they can provide additional
-  // information that's not already present (or not obvious) in the
-  // print-out of x and the matcher's description.  Whether the match
-  // succeeds is not a factor in deciding whether an explanation is
-  // needed, as sometimes the caller needs to print a failure message
-  // when the match succeeds (e.g. when the matcher is used inside
-  // Not()).
-  //
-  // For example, a "has at least 10 elements" matcher should explain
-  // what the actual element count is, regardless of the match result,
-  // as it is useful information to the reader; on the other hand, an
-  // "is empty" matcher probably only needs to explain what the actual
-  // size is when the match fails, as it's redundant to say that the
-  // size is 0 when the value is already known to be empty.
-  //
-  // You should override this method when defining a new matcher.
-  //
-  // It's the responsibility of the caller (Google Test) to guarantee
-  // that 'listener' is not NULL.  This helps to simplify a matcher's
-  // implementation when it doesn't care about the performance, as it
-  // can talk to 'listener' without checking its validity first.
-  // However, in order to implement dummy listeners efficiently,
-  // listener->stream() may be NULL.
-  virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
-
-  // Inherits these methods from MatcherDescriberInterface:
-  //   virtual void DescribeTo(::std::ostream* os) const = 0;
-  //   virtual void DescribeNegationTo(::std::ostream* os) const;
-};
-
-namespace internal {
-
-struct AnyEq {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a == b; }
-};
-struct AnyNe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a != b; }
-};
-struct AnyLt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a < b; }
-};
-struct AnyGt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a > b; }
-};
-struct AnyLe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a <= b; }
-};
-struct AnyGe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a >= b; }
-};
-
-// A match result listener that ignores the explanation.
-class DummyMatchResultListener : public MatchResultListener {
- public:
-  DummyMatchResultListener() : MatchResultListener(nullptr) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DummyMatchResultListener);
-};
-
-// A match result listener that forwards the explanation to a given
-// ostream.  The difference between this and MatchResultListener is
-// that the former is concrete.
-class StreamMatchResultListener : public MatchResultListener {
- public:
-  explicit StreamMatchResultListener(::std::ostream* os)
-      : MatchResultListener(os) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamMatchResultListener);
-};
-
-struct SharedPayloadBase {
-  std::atomic<int> ref{1};
-  void Ref() { ref.fetch_add(1, std::memory_order_relaxed); }
-  bool Unref() { return ref.fetch_sub(1, std::memory_order_acq_rel) == 1; }
-};
-
-template <typename T>
-struct SharedPayload : SharedPayloadBase {
-  explicit SharedPayload(const T& v) : value(v) {}
-  explicit SharedPayload(T&& v) : value(std::move(v)) {}
-
-  static void Destroy(SharedPayloadBase* shared) {
-    delete static_cast<SharedPayload*>(shared);
-  }
-
-  T value;
-};
-
-// An internal class for implementing Matcher<T>, which will derive
-// from it.  We put functionalities common to all Matcher<T>
-// specializations here to avoid code duplication.
-template <typename T>
-class MatcherBase : private MatcherDescriberInterface {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener'.
-  bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
-    GTEST_CHECK_(vtable_ != nullptr);
-    return vtable_->match_and_explain(*this, x, listener);
-  }
-
-  // Returns true if and only if this matcher matches x.
-  bool Matches(const T& x) const {
-    DummyMatchResultListener dummy;
-    return MatchAndExplain(x, &dummy);
-  }
-
-  // Describes this matcher to an ostream.
-  void DescribeTo(::std::ostream* os) const final {
-    GTEST_CHECK_(vtable_ != nullptr);
-    vtable_->describe(*this, os, false);
-  }
-
-  // Describes the negation of this matcher to an ostream.
-  void DescribeNegationTo(::std::ostream* os) const final {
-    GTEST_CHECK_(vtable_ != nullptr);
-    vtable_->describe(*this, os, true);
-  }
-
-  // Explains why x matches, or doesn't match, the matcher.
-  void ExplainMatchResultTo(const T& x, ::std::ostream* os) const {
-    StreamMatchResultListener listener(os);
-    MatchAndExplain(x, &listener);
-  }
-
-  // Returns the describer for this matcher object; retains ownership
-  // of the describer, which is only guaranteed to be alive when
-  // this matcher object is alive.
-  const MatcherDescriberInterface* GetDescriber() const {
-    if (vtable_ == nullptr) return nullptr;
-    return vtable_->get_describer(*this);
-  }
-
- protected:
-  MatcherBase() : vtable_(nullptr) {}
-
-  // Constructs a matcher from its implementation.
-  template <typename U>
-  explicit MatcherBase(const MatcherInterface<U>* impl) {
-    Init(impl);
-  }
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  MatcherBase(M&& m) {  // NOLINT
-    Init(std::forward<M>(m));
-  }
-
-  MatcherBase(const MatcherBase& other)
-      : vtable_(other.vtable_), buffer_(other.buffer_) {
-    if (IsShared()) buffer_.shared->Ref();
-  }
-
-  MatcherBase& operator=(const MatcherBase& other) {
-    if (this == &other) return *this;
-    Destroy();
-    vtable_ = other.vtable_;
-    buffer_ = other.buffer_;
-    if (IsShared()) buffer_.shared->Ref();
-    return *this;
-  }
-
-  MatcherBase(MatcherBase&& other)
-      : vtable_(other.vtable_), buffer_(other.buffer_) {
-    other.vtable_ = nullptr;
-  }
-
-  MatcherBase& operator=(MatcherBase&& other) {
-    if (this == &other) return *this;
-    Destroy();
-    vtable_ = other.vtable_;
-    buffer_ = other.buffer_;
-    other.vtable_ = nullptr;
-    return *this;
-  }
-
-  ~MatcherBase() override { Destroy(); }
-
- private:
-  struct VTable {
-    bool (*match_and_explain)(const MatcherBase&, const T&,
-                              MatchResultListener*);
-    void (*describe)(const MatcherBase&, std::ostream*, bool negation);
-    // Returns the captured object if it implements the interface, otherwise
-    // returns the MatcherBase itself.
-    const MatcherDescriberInterface* (*get_describer)(const MatcherBase&);
-    // Called on shared instances when the reference count reaches 0.
-    void (*shared_destroy)(SharedPayloadBase*);
-  };
-
-  bool IsShared() const {
-    return vtable_ != nullptr && vtable_->shared_destroy != nullptr;
-  }
-
-  // If the implementation uses a listener, call that.
-  template <typename P>
-  static auto MatchAndExplainImpl(const MatcherBase& m, const T& value,
-                                  MatchResultListener* listener)
-      -> decltype(P::Get(m).MatchAndExplain(value, listener->stream())) {
-    return P::Get(m).MatchAndExplain(value, listener->stream());
-  }
-
-  template <typename P>
-  static auto MatchAndExplainImpl(const MatcherBase& m, const T& value,
-                                  MatchResultListener* listener)
-      -> decltype(P::Get(m).MatchAndExplain(value, listener)) {
-    return P::Get(m).MatchAndExplain(value, listener);
-  }
-
-  template <typename P>
-  static void DescribeImpl(const MatcherBase& m, std::ostream* os,
-                           bool negation) {
-    if (negation) {
-      P::Get(m).DescribeNegationTo(os);
-    } else {
-      P::Get(m).DescribeTo(os);
-    }
-  }
-
-  template <typename P>
-  static const MatcherDescriberInterface* GetDescriberImpl(
-      const MatcherBase& m) {
-    // If the impl is a MatcherDescriberInterface, then return it.
-    // Otherwise use MatcherBase itself.
-    // This allows us to implement the GetDescriber() function without support
-    // from the impl, but some users really want to get their impl back when
-    // they call GetDescriber().
-    // We use std::get on a tuple as a workaround of not having `if constexpr`.
-    return std::get<(
-        std::is_convertible<decltype(&P::Get(m)),
-                            const MatcherDescriberInterface*>::value
-            ? 1
-            : 0)>(std::make_tuple(&m, &P::Get(m)));
-  }
-
-  template <typename P>
-  const VTable* GetVTable() {
-    static constexpr VTable kVTable = {&MatchAndExplainImpl<P>,
-                                       &DescribeImpl<P>, &GetDescriberImpl<P>,
-                                       P::shared_destroy};
-    return &kVTable;
-  }
-
-  union Buffer {
-    // Add some types to give Buffer some common alignment/size use cases.
-    void* ptr;
-    double d;
-    int64_t i;
-    // And add one for the out-of-line cases.
-    SharedPayloadBase* shared;
-  };
-
-  void Destroy() {
-    if (IsShared() && buffer_.shared->Unref()) {
-      vtable_->shared_destroy(buffer_.shared);
-    }
-  }
-
-  template <typename M>
-  static constexpr bool IsInlined() {
-    return sizeof(M) <= sizeof(Buffer) && alignof(M) <= alignof(Buffer) &&
-           std::is_trivially_copy_constructible<M>::value &&
-           std::is_trivially_destructible<M>::value;
-  }
-
-  template <typename M, bool = MatcherBase::IsInlined<M>()>
-  struct ValuePolicy {
-    static const M& Get(const MatcherBase& m) {
-      // When inlined along with Init, need to be explicit to avoid violating
-      // strict aliasing rules.
-      const M *ptr = static_cast<const M*>(
-          static_cast<const void*>(&m.buffer_));
-      return *ptr;
-    }
-    static void Init(MatcherBase& m, M impl) {
-      ::new (static_cast<void*>(&m.buffer_)) M(impl);
-    }
-    static constexpr auto shared_destroy = nullptr;
-  };
-
-  template <typename M>
-  struct ValuePolicy<M, false> {
-    using Shared = SharedPayload<M>;
-    static const M& Get(const MatcherBase& m) {
-      return static_cast<Shared*>(m.buffer_.shared)->value;
-    }
-    template <typename Arg>
-    static void Init(MatcherBase& m, Arg&& arg) {
-      m.buffer_.shared = new Shared(std::forward<Arg>(arg));
-    }
-    static constexpr auto shared_destroy = &Shared::Destroy;
-  };
-
-  template <typename U, bool B>
-  struct ValuePolicy<const MatcherInterface<U>*, B> {
-    using M = const MatcherInterface<U>;
-    using Shared = SharedPayload<std::unique_ptr<M>>;
-    static const M& Get(const MatcherBase& m) {
-      return *static_cast<Shared*>(m.buffer_.shared)->value;
-    }
-    static void Init(MatcherBase& m, M* impl) {
-      m.buffer_.shared = new Shared(std::unique_ptr<M>(impl));
-    }
-
-    static constexpr auto shared_destroy = &Shared::Destroy;
-  };
-
-  template <typename M>
-  void Init(M&& m) {
-    using MM = typename std::decay<M>::type;
-    using Policy = ValuePolicy<MM>;
-    vtable_ = GetVTable<Policy>();
-    Policy::Init(*this, std::forward<M>(m));
-  }
-
-  const VTable* vtable_;
-  Buffer buffer_;
-};
-
-}  // namespace internal
-
-// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
-// object that can check whether a value of type T matches.  The
-// implementation of Matcher<T> is just a std::shared_ptr to const
-// MatcherInterface<T>.  Don't inherit from Matcher!
-template <typename T>
-class Matcher : public internal::MatcherBase<T> {
- public:
-  // Constructs a null matcher.  Needed for storing Matcher objects in STL
-  // containers.  A default-constructed matcher is not yet initialized.  You
-  // cannot use it until a valid value has been assigned to it.
-  explicit Matcher() {}  // NOLINT
-
-  // Constructs a matcher from its implementation.
-  explicit Matcher(const MatcherInterface<const T&>* impl)
-      : internal::MatcherBase<T>(impl) {}
-
-  template <typename U>
-  explicit Matcher(
-      const MatcherInterface<U>* impl,
-      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
-          nullptr)
-      : internal::MatcherBase<T>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m) : internal::MatcherBase<T>(std::forward<M>(m)) {}  // NOLINT
-
-  // Implicit constructor here allows people to write
-  // EXPECT_CALL(foo, Bar(5)) instead of EXPECT_CALL(foo, Bar(Eq(5))) sometimes
-  Matcher(T value);  // NOLINT
-};
-
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a std::string
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const std::string&>
-    : public internal::MatcherBase<const std::string&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<const std::string&>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<const std::string&>(std::forward<M>(m)) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<std::string>
-    : public internal::MatcherBase<std::string> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-  explicit Matcher(const MatcherInterface<std::string>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<std::string>(std::forward<M>(m)) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a absl::string_view
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const internal::StringView&>
-    : public internal::MatcherBase<const internal::StringView&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const internal::StringView&>* impl)
-      : internal::MatcherBase<const internal::StringView&>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<const internal::StringView&>(std::forward<M>(m)) {
-  }
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views or std::string_views directly.
-  Matcher(internal::StringView s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<internal::StringView>
-    : public internal::MatcherBase<internal::StringView> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const internal::StringView&>* impl)
-      : internal::MatcherBase<internal::StringView>(impl) {}
-  explicit Matcher(const MatcherInterface<internal::StringView>* impl)
-      : internal::MatcherBase<internal::StringView>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<internal::StringView>(std::forward<M>(m)) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views or std::string_views directly.
-  Matcher(internal::StringView s);  // NOLINT
-};
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-// Prints a matcher in a human-readable format.
-template <typename T>
-std::ostream& operator<<(std::ostream& os, const Matcher<T>& matcher) {
-  matcher.DescribeTo(&os);
-  return os;
-}
-
-// The PolymorphicMatcher class template makes it easy to implement a
-// polymorphic matcher (i.e. a matcher that can match values of more
-// than one type, e.g. Eq(n) and NotNull()).
-//
-// To define a polymorphic matcher, a user should provide an Impl
-// class that has a DescribeTo() method and a DescribeNegationTo()
-// method, and define a member function (or member function template)
-//
-//   bool MatchAndExplain(const Value& value,
-//                        MatchResultListener* listener) const;
-//
-// See the definition of NotNull() for a complete example.
-template <class Impl>
-class PolymorphicMatcher {
- public:
-  explicit PolymorphicMatcher(const Impl& an_impl) : impl_(an_impl) {}
-
-  // Returns a mutable reference to the underlying matcher
-  // implementation object.
-  Impl& mutable_impl() { return impl_; }
-
-  // Returns an immutable reference to the underlying matcher
-  // implementation object.
-  const Impl& impl() const { return impl_; }
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new MonomorphicImpl<const T&>(impl_));
-  }
-
- private:
-  template <typename T>
-  class MonomorphicImpl : public MatcherInterface<T> {
-   public:
-    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
-
-    void DescribeTo(::std::ostream* os) const override { impl_.DescribeTo(os); }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      impl_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
-      return impl_.MatchAndExplain(x, listener);
-    }
-
-   private:
-    const Impl impl_;
-  };
-
-  Impl impl_;
-};
-
-// Creates a matcher from its implementation.
-// DEPRECATED: Especially in the generic code, prefer:
-//   Matcher<T>(new MyMatcherImpl<const T&>(...));
-//
-// MakeMatcher may create a Matcher that accepts its argument by value, which
-// leads to unnecessary copies & lack of support for non-copyable types.
-template <typename T>
-inline Matcher<T> MakeMatcher(const MatcherInterface<T>* impl) {
-  return Matcher<T>(impl);
-}
-
-// Creates a polymorphic matcher from its implementation.  This is
-// easier to use than the PolymorphicMatcher<Impl> constructor as it
-// doesn't require you to explicitly write the template argument, e.g.
-//
-//   MakePolymorphicMatcher(foo);
-// vs
-//   PolymorphicMatcher<TypeOfFoo>(foo);
-template <class Impl>
-inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
-  return PolymorphicMatcher<Impl>(impl);
-}
-
-namespace internal {
-// Implements a matcher that compares a given value with a
-// pre-supplied value using one of the ==, <=, <, etc, operators.  The
-// two values being compared don't have to have the same type.
-//
-// The matcher defined here is polymorphic (for example, Eq(5) can be
-// used to match an int, a short, a double, etc).  Therefore we use
-// a template type conversion operator in the implementation.
-//
-// The following template definition assumes that the Rhs parameter is
-// a "bare" type (i.e. neither 'const T' nor 'T&').
-template <typename D, typename Rhs, typename Op>
-class ComparisonBase {
- public:
-  explicit ComparisonBase(const Rhs& rhs) : rhs_(rhs) {}
-
-  using is_gtest_matcher = void;
-
-  template <typename Lhs>
-  bool MatchAndExplain(const Lhs& lhs, std::ostream*) const {
-    return Op()(lhs, Unwrap(rhs_));
-  }
-  void DescribeTo(std::ostream* os) const {
-    *os << D::Desc() << " ";
-    UniversalPrint(Unwrap(rhs_), os);
-  }
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << D::NegatedDesc() << " ";
-    UniversalPrint(Unwrap(rhs_), os);
-  }
-
- private:
-  template <typename T>
-  static const T& Unwrap(const T& v) {
-    return v;
-  }
-  template <typename T>
-  static const T& Unwrap(std::reference_wrapper<T> v) {
-    return v;
-  }
-
-  Rhs rhs_;
-};
-
-template <typename Rhs>
-class EqMatcher : public ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq> {
- public:
-  explicit EqMatcher(const Rhs& rhs)
-      : ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq>(rhs) { }
-  static const char* Desc() { return "is equal to"; }
-  static const char* NegatedDesc() { return "isn't equal to"; }
-};
-template <typename Rhs>
-class NeMatcher : public ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe> {
- public:
-  explicit NeMatcher(const Rhs& rhs)
-      : ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe>(rhs) { }
-  static const char* Desc() { return "isn't equal to"; }
-  static const char* NegatedDesc() { return "is equal to"; }
-};
-template <typename Rhs>
-class LtMatcher : public ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt> {
- public:
-  explicit LtMatcher(const Rhs& rhs)
-      : ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt>(rhs) { }
-  static const char* Desc() { return "is <"; }
-  static const char* NegatedDesc() { return "isn't <"; }
-};
-template <typename Rhs>
-class GtMatcher : public ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt> {
- public:
-  explicit GtMatcher(const Rhs& rhs)
-      : ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt>(rhs) { }
-  static const char* Desc() { return "is >"; }
-  static const char* NegatedDesc() { return "isn't >"; }
-};
-template <typename Rhs>
-class LeMatcher : public ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe> {
- public:
-  explicit LeMatcher(const Rhs& rhs)
-      : ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe>(rhs) { }
-  static const char* Desc() { return "is <="; }
-  static const char* NegatedDesc() { return "isn't <="; }
-};
-template <typename Rhs>
-class GeMatcher : public ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe> {
- public:
-  explicit GeMatcher(const Rhs& rhs)
-      : ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe>(rhs) { }
-  static const char* Desc() { return "is >="; }
-  static const char* NegatedDesc() { return "isn't >="; }
-};
-
-template <typename T, typename = typename std::enable_if<
-                          std::is_constructible<std::string, T>::value>::type>
-using StringLike = T;
-
-// Implements polymorphic matchers MatchesRegex(regex) and
-// ContainsRegex(regex), which can be used as a Matcher<T> as long as
-// T can be converted to a string.
-class MatchesRegexMatcher {
- public:
-  MatchesRegexMatcher(const RE* regex, bool full_match)
-      : regex_(regex), full_match_(full_match) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    return MatchAndExplain(std::string(s), listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(std::string(s), listener);
-  }
-
-  // Matches anything that can convert to std::string.
-  //
-  // This is a template, not just a plain function with const std::string&,
-  // because absl::string_view has some interfering non-explicit constructors.
-  template <class MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const std::string& s2(s);
-    return full_match_ ? RE::FullMatch(s2, *regex_)
-                       : RE::PartialMatch(s2, *regex_);
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << (full_match_ ? "matches" : "contains") << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't " << (full_match_ ? "match" : "contain")
-        << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
- private:
-  const std::shared_ptr<const RE> regex_;
-  const bool full_match_;
-};
-}  // namespace internal
-
-// Matches a string that fully matches regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, true));
-}
-template <typename T = std::string>
-PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const internal::StringLike<T>& regex) {
-  return MatchesRegex(new internal::RE(std::string(regex)));
-}
-
-// Matches a string that contains regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, false));
-}
-template <typename T = std::string>
-PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const internal::StringLike<T>& regex) {
-  return ContainsRegex(new internal::RE(std::string(regex)));
-}
-
-// Creates a polymorphic matcher that matches anything equal to x.
-// Note: if the parameter of Eq() were declared as const T&, Eq("foo")
-// wouldn't compile.
-template <typename T>
-inline internal::EqMatcher<T> Eq(T x) { return internal::EqMatcher<T>(x); }
-
-// Constructs a Matcher<T> from a 'value' of type T.  The constructed
-// matcher matches any value that's equal to 'value'.
-template <typename T>
-Matcher<T>::Matcher(T value) { *this = Eq(value); }
-
-// Creates a monomorphic matcher that matches anything with type Lhs
-// and equal to rhs.  A user may need to use this instead of Eq(...)
-// in order to resolve an overloading ambiguity.
-//
-// TypedEq<T>(x) is just a convenient short-hand for Matcher<T>(Eq(x))
-// or Matcher<T>(x), but more readable than the latter.
-//
-// We could define similar monomorphic matchers for other comparison
-// operations (e.g. TypedLt, TypedGe, and etc), but decided not to do
-// it yet as those are used much less than Eq() in practice.  A user
-// can always write Matcher<T>(Lt(5)) to be explicit about the type,
-// for example.
-template <typename Lhs, typename Rhs>
-inline Matcher<Lhs> TypedEq(const Rhs& rhs) { return Eq(rhs); }
-
-// Creates a polymorphic matcher that matches anything >= x.
-template <typename Rhs>
-inline internal::GeMatcher<Rhs> Ge(Rhs x) {
-  return internal::GeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything > x.
-template <typename Rhs>
-inline internal::GtMatcher<Rhs> Gt(Rhs x) {
-  return internal::GtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything <= x.
-template <typename Rhs>
-inline internal::LeMatcher<Rhs> Le(Rhs x) {
-  return internal::LeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything < x.
-template <typename Rhs>
-inline internal::LtMatcher<Rhs> Lt(Rhs x) {
-  return internal::LtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything != x.
-template <typename Rhs>
-inline internal::NeMatcher<Rhs> Ne(Rhs x) {
-  return internal::NeMatcher<Rhs>(x);
-}
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-message.h b/third_party/googletest/googletest/include/gtest/gtest-message.h
deleted file mode 100644
index becfd49..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-message.h
+++ /dev/null
@@ -1,219 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the Message class.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-
-#include <limits>
-#include <memory>
-#include <sstream>
-
-#include "gtest/internal/gtest-port.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// Ensures that there is at least one operator<< in the global namespace.
-// See Message& operator<<(...) below for why.
-void operator<<(const testing::internal::Secret&, int);
-
-namespace testing {
-
-// The Message class works like an ostream repeater.
-//
-// Typical usage:
-//
-//   1. You stream a bunch of values to a Message object.
-//      It will remember the text in a stringstream.
-//   2. Then you stream the Message object to an ostream.
-//      This causes the text in the Message to be streamed
-//      to the ostream.
-//
-// For example;
-//
-//   testing::Message foo;
-//   foo << 1 << " != " << 2;
-//   std::cout << foo;
-//
-// will print "1 != 2".
-//
-// Message is not intended to be inherited from.  In particular, its
-// destructor is not virtual.
-//
-// Note that stringstream behaves differently in gcc and in MSVC.  You
-// can stream a NULL char pointer to it in the former, but not in the
-// latter (it causes an access violation if you do).  The Message
-// class hides this difference by treating a NULL char pointer as
-// "(null)".
-class GTEST_API_ Message {
- private:
-  // The type of basic IO manipulators (endl, ends, and flush) for
-  // narrow streams.
-  typedef std::ostream& (*BasicNarrowIoManip)(std::ostream&);
-
- public:
-  // Constructs an empty Message.
-  Message();
-
-  // Copy constructor.
-  Message(const Message& msg) : ss_(new ::std::stringstream) {  // NOLINT
-    *ss_ << msg.GetString();
-  }
-
-  // Constructs a Message from a C-string.
-  explicit Message(const char* str) : ss_(new ::std::stringstream) {
-    *ss_ << str;
-  }
-
-  // Streams a non-pointer value to this object.
-  template <typename T>
-  inline Message& operator <<(const T& val) {
-    // Some libraries overload << for STL containers.  These
-    // overloads are defined in the global namespace instead of ::std.
-    //
-    // C++'s symbol lookup rule (i.e. Koenig lookup) says that these
-    // overloads are visible in either the std namespace or the global
-    // namespace, but not other namespaces, including the testing
-    // namespace which Google Test's Message class is in.
-    //
-    // To allow STL containers (and other types that has a << operator
-    // defined in the global namespace) to be used in Google Test
-    // assertions, testing::Message must access the custom << operator
-    // from the global namespace.  With this using declaration,
-    // overloads of << defined in the global namespace and those
-    // visible via Koenig lookup are both exposed in this function.
-    using ::operator <<;
-    *ss_ << val;
-    return *this;
-  }
-
-  // Streams a pointer value to this object.
-  //
-  // This function is an overload of the previous one.  When you
-  // stream a pointer to a Message, this definition will be used as it
-  // is more specialized.  (The C++ Standard, section
-  // [temp.func.order].)  If you stream a non-pointer, then the
-  // previous definition will be used.
-  //
-  // The reason for this overload is that streaming a NULL pointer to
-  // ostream is undefined behavior.  Depending on the compiler, you
-  // may get "0", "(nil)", "(null)", or an access violation.  To
-  // ensure consistent result across compilers, we always treat NULL
-  // as "(null)".
-  template <typename T>
-  inline Message& operator <<(T* const& pointer) {  // NOLINT
-    if (pointer == nullptr) {
-      *ss_ << "(null)";
-    } else {
-      *ss_ << pointer;
-    }
-    return *this;
-  }
-
-  // Since the basic IO manipulators are overloaded for both narrow
-  // and wide streams, we have to provide this specialized definition
-  // of operator <<, even though its body is the same as the
-  // templatized version above.  Without this definition, streaming
-  // endl or other basic IO manipulators to Message will confuse the
-  // compiler.
-  Message& operator <<(BasicNarrowIoManip val) {
-    *ss_ << val;
-    return *this;
-  }
-
-  // Instead of 1/0, we want to see true/false for bool values.
-  Message& operator <<(bool b) {
-    return *this << (b ? "true" : "false");
-  }
-
-  // These two overloads allow streaming a wide C string to a Message
-  // using the UTF-8 encoding.
-  Message& operator <<(const wchar_t* wide_c_str);
-  Message& operator <<(wchar_t* wide_c_str);
-
-#if GTEST_HAS_STD_WSTRING
-  // Converts the given wide string to a narrow string using the UTF-8
-  // encoding, and streams the result to this Message object.
-  Message& operator <<(const ::std::wstring& wstr);
-#endif  // GTEST_HAS_STD_WSTRING
-
-  // Gets the text streamed to this object so far as an std::string.
-  // Each '\0' character in the buffer is replaced with "\\0".
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  std::string GetString() const;
-
- private:
-  // We'll hold the text streamed to this object here.
-  const std::unique_ptr< ::std::stringstream> ss_;
-
-  // We declare (but don't implement) this to prevent the compiler
-  // from implementing the assignment operator.
-  void operator=(const Message&);
-};
-
-// Streams a Message to an ostream.
-inline std::ostream& operator <<(std::ostream& os, const Message& sb) {
-  return os << sb.GetString();
-}
-
-namespace internal {
-
-// Converts a streamable value to an std::string.  A NULL pointer is
-// converted to "(null)".  When the input value is a ::string,
-// ::std::string, ::wstring, or ::std::wstring object, each NUL
-// character in it is replaced with "\\0".
-template <typename T>
-std::string StreamableToString(const T& streamable) {
-  return (Message() << streamable).GetString();
-}
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-param-test.h b/third_party/googletest/googletest/include/gtest/gtest-param-test.h
deleted file mode 100644
index 804e702..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-param-test.h
+++ /dev/null
@@ -1,507 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Macros and functions for implementing parameterized tests
-// in Google C++ Testing and Mocking Framework (Google Test)
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-
-// Value-parameterized tests allow you to test your code with different
-// parameters without writing multiple copies of the same test.
-//
-// Here is how you use value-parameterized tests:
-
-#if 0
-
-// To write value-parameterized tests, first you should define a fixture
-// class. It is usually derived from testing::TestWithParam<T> (see below for
-// another inheritance scheme that's sometimes useful in more complicated
-// class hierarchies), where the type of your parameter values.
-// TestWithParam<T> is itself derived from testing::Test. T can be any
-// copyable type. If it's a raw pointer, you are responsible for managing the
-// lifespan of the pointed values.
-
-class FooTest : public ::testing::TestWithParam<const char*> {
-  // You can implement all the usual class fixture members here.
-};
-
-// Then, use the TEST_P macro to define as many parameterized tests
-// for this fixture as you want. The _P suffix is for "parameterized"
-// or "pattern", whichever you prefer to think.
-
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-
-// Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test
-// case with any set of parameters you want. Google Test defines a number
-// of functions for generating test parameters. They return what we call
-// (surprise!) parameter generators. Here is a summary of them, which
-// are all in the testing namespace:
-//
-//
-//  Range(begin, end [, step]) - Yields values {begin, begin+step,
-//                               begin+step+step, ...}. The values do not
-//                               include end. step defaults to 1.
-//  Values(v1, v2, ..., vN)    - Yields values {v1, v2, ..., vN}.
-//  ValuesIn(container)        - Yields values from a C-style array, an STL
-//  ValuesIn(begin,end)          container, or an iterator range [begin, end).
-//  Bool()                     - Yields sequence {false, true}.
-//  Combine(g1, g2, ..., gN)   - Yields all combinations (the Cartesian product
-//                               for the math savvy) of the values generated
-//                               by the N generators.
-//
-// For more details, see comments at the definitions of these functions below
-// in this file.
-//
-// The following statement will instantiate tests from the FooTest test suite
-// each with parameter values "meeny", "miny", and "moe".
-
-INSTANTIATE_TEST_SUITE_P(InstantiationName,
-                         FooTest,
-                         Values("meeny", "miny", "moe"));
-
-// To distinguish different instances of the pattern, (yes, you
-// can instantiate it more than once) the first argument to the
-// INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the
-// actual test suite name. Remember to pick unique prefixes for different
-// instantiations. The tests from the instantiation above will have
-// these names:
-//
-//    * InstantiationName/FooTest.DoesBlah/0 for "meeny"
-//    * InstantiationName/FooTest.DoesBlah/1 for "miny"
-//    * InstantiationName/FooTest.DoesBlah/2 for "moe"
-//    * InstantiationName/FooTest.HasBlahBlah/0 for "meeny"
-//    * InstantiationName/FooTest.HasBlahBlah/1 for "miny"
-//    * InstantiationName/FooTest.HasBlahBlah/2 for "moe"
-//
-// You can use these names in --gtest_filter.
-//
-// This statement will instantiate all tests from FooTest again, each
-// with parameter values "cat" and "dog":
-
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
-
-// The tests from the instantiation above will have these names:
-//
-//    * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog"
-//
-// Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests
-// in the given test suite, whether their definitions come before or
-// AFTER the INSTANTIATE_TEST_SUITE_P statement.
-//
-// Please also note that generator expressions (including parameters to the
-// generators) are evaluated in InitGoogleTest(), after main() has started.
-// This allows the user on one hand, to adjust generator parameters in order
-// to dynamically determine a set of tests to run and on the other hand,
-// give the user a chance to inspect the generated tests with Google Test
-// reflection API before RUN_ALL_TESTS() is executed.
-//
-// You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc
-// for more examples.
-//
-// In the future, we plan to publish the API for defining new parameter
-// generators. But for now this interface remains part of the internal
-// implementation and is subject to change.
-//
-//
-// A parameterized test fixture must be derived from testing::Test and from
-// testing::WithParamInterface<T>, where T is the type of the parameter
-// values. Inheriting from TestWithParam<T> satisfies that requirement because
-// TestWithParam<T> inherits from both Test and WithParamInterface. In more
-// complicated hierarchies, however, it is occasionally useful to inherit
-// separately from Test and WithParamInterface. For example:
-
-class BaseTest : public ::testing::Test {
-  // You can inherit all the usual members for a non-parameterized test
-  // fixture here.
-};
-
-class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> {
-  // The usual test fixture members go here too.
-};
-
-TEST_F(BaseTest, HasFoo) {
-  // This is an ordinary non-parameterized test.
-}
-
-TEST_P(DerivedTest, DoesBlah) {
-  // GetParam works just the same here as if you inherit from TestWithParam.
-  EXPECT_TRUE(foo.Blah(GetParam()));
-}
-
-#endif  // 0
-
-#include <iterator>
-#include <utility>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-param-util.h"
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-
-// Functions producing parameter generators.
-//
-// Google Test uses these generators to produce parameters for value-
-// parameterized tests. When a parameterized test suite is instantiated
-// with a particular generator, Google Test creates and runs tests
-// for each element in the sequence produced by the generator.
-//
-// In the following sample, tests from test suite FooTest are instantiated
-// each three times with parameter values 3, 5, and 8:
-//
-// class FooTest : public TestWithParam<int> { ... };
-//
-// TEST_P(FooTest, TestThis) {
-// }
-// TEST_P(FooTest, TestThat) {
-// }
-// INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8));
-//
-
-// Range() returns generators providing sequences of values in a range.
-//
-// Synopsis:
-// Range(start, end)
-//   - returns a generator producing a sequence of values {start, start+1,
-//     start+2, ..., }.
-// Range(start, end, step)
-//   - returns a generator producing a sequence of values {start, start+step,
-//     start+step+step, ..., }.
-// Notes:
-//   * The generated sequences never include end. For example, Range(1, 5)
-//     returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2)
-//     returns a generator producing {1, 3, 5, 7}.
-//   * start and end must have the same type. That type may be any integral or
-//     floating-point type or a user defined type satisfying these conditions:
-//     * It must be assignable (have operator=() defined).
-//     * It must have operator+() (operator+(int-compatible type) for
-//       two-operand version).
-//     * It must have operator<() defined.
-//     Elements in the resulting sequences will also have that type.
-//   * Condition start < end must be satisfied in order for resulting sequences
-//     to contain any elements.
-//
-template <typename T, typename IncrementT>
-internal::ParamGenerator<T> Range(T start, T end, IncrementT step) {
-  return internal::ParamGenerator<T>(
-      new internal::RangeGenerator<T, IncrementT>(start, end, step));
-}
-
-template <typename T>
-internal::ParamGenerator<T> Range(T start, T end) {
-  return Range(start, end, 1);
-}
-
-// ValuesIn() function allows generation of tests with parameters coming from
-// a container.
-//
-// Synopsis:
-// ValuesIn(const T (&array)[N])
-//   - returns a generator producing sequences with elements from
-//     a C-style array.
-// ValuesIn(const Container& container)
-//   - returns a generator producing sequences with elements from
-//     an STL-style container.
-// ValuesIn(Iterator begin, Iterator end)
-//   - returns a generator producing sequences with elements from
-//     a range [begin, end) defined by a pair of STL-style iterators. These
-//     iterators can also be plain C pointers.
-//
-// Please note that ValuesIn copies the values from the containers
-// passed in and keeps them to generate tests in RUN_ALL_TESTS().
-//
-// Examples:
-//
-// This instantiates tests from test suite StringTest
-// each with C-string values of "foo", "bar", and "baz":
-//
-// const char* strings[] = {"foo", "bar", "baz"};
-// INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings));
-//
-// This instantiates tests from test suite StlStringTest
-// each with STL strings with values "a" and "b":
-//
-// ::std::vector< ::std::string> GetParameterStrings() {
-//   ::std::vector< ::std::string> v;
-//   v.push_back("a");
-//   v.push_back("b");
-//   return v;
-// }
-//
-// INSTANTIATE_TEST_SUITE_P(CharSequence,
-//                          StlStringTest,
-//                          ValuesIn(GetParameterStrings()));
-//
-//
-// This will also instantiate tests from CharTest
-// each with parameter values 'a' and 'b':
-//
-// ::std::list<char> GetParameterChars() {
-//   ::std::list<char> list;
-//   list.push_back('a');
-//   list.push_back('b');
-//   return list;
-// }
-// ::std::list<char> l = GetParameterChars();
-// INSTANTIATE_TEST_SUITE_P(CharSequence2,
-//                          CharTest,
-//                          ValuesIn(l.begin(), l.end()));
-//
-template <typename ForwardIterator>
-internal::ParamGenerator<
-    typename std::iterator_traits<ForwardIterator>::value_type>
-ValuesIn(ForwardIterator begin, ForwardIterator end) {
-  typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType;
-  return internal::ParamGenerator<ParamType>(
-      new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end));
-}
-
-template <typename T, size_t N>
-internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) {
-  return ValuesIn(array, array + N);
-}
-
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container) {
-  return ValuesIn(container.begin(), container.end());
-}
-
-// Values() allows generating tests from explicitly specified list of
-// parameters.
-//
-// Synopsis:
-// Values(T v1, T v2, ..., T vN)
-//   - returns a generator producing sequences with elements v1, v2, ..., vN.
-//
-// For example, this instantiates tests from test suite BarTest each
-// with values "one", "two", and "three":
-//
-// INSTANTIATE_TEST_SUITE_P(NumSequence,
-//                          BarTest,
-//                          Values("one", "two", "three"));
-//
-// This instantiates tests from test suite BazTest each with values 1, 2, 3.5.
-// The exact type of values will depend on the type of parameter in BazTest.
-//
-// INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5));
-//
-//
-template <typename... T>
-internal::ValueArray<T...> Values(T... v) {
-  return internal::ValueArray<T...>(std::move(v)...);
-}
-
-// Bool() allows generating tests with parameters in a set of (false, true).
-//
-// Synopsis:
-// Bool()
-//   - returns a generator producing sequences with elements {false, true}.
-//
-// It is useful when testing code that depends on Boolean flags. Combinations
-// of multiple flags can be tested when several Bool()'s are combined using
-// Combine() function.
-//
-// In the following example all tests in the test suite FlagDependentTest
-// will be instantiated twice with parameters false and true.
-//
-// class FlagDependentTest : public testing::TestWithParam<bool> {
-//   virtual void SetUp() {
-//     external_flag = GetParam();
-//   }
-// }
-// INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool());
-//
-inline internal::ParamGenerator<bool> Bool() {
-  return Values(false, true);
-}
-
-// Combine() allows the user to combine two or more sequences to produce
-// values of a Cartesian product of those sequences' elements.
-//
-// Synopsis:
-// Combine(gen1, gen2, ..., genN)
-//   - returns a generator producing sequences with elements coming from
-//     the Cartesian product of elements from the sequences generated by
-//     gen1, gen2, ..., genN. The sequence elements will have a type of
-//     std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types
-//     of elements from sequences produces by gen1, gen2, ..., genN.
-//
-// Example:
-//
-// This will instantiate tests in test suite AnimalTest each one with
-// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
-// tuple("dog", BLACK), and tuple("dog", WHITE):
-//
-// enum Color { BLACK, GRAY, WHITE };
-// class AnimalTest
-//     : public testing::TestWithParam<std::tuple<const char*, Color> > {...};
-//
-// TEST_P(AnimalTest, AnimalLooksNice) {...}
-//
-// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
-//                          Combine(Values("cat", "dog"),
-//                                  Values(BLACK, WHITE)));
-//
-// This will instantiate tests in FlagDependentTest with all variations of two
-// Boolean flags:
-//
-// class FlagDependentTest
-//     : public testing::TestWithParam<std::tuple<bool, bool> > {
-//   virtual void SetUp() {
-//     // Assigns external_flag_1 and external_flag_2 values from the tuple.
-//     std::tie(external_flag_1, external_flag_2) = GetParam();
-//   }
-// };
-//
-// TEST_P(FlagDependentTest, TestFeature1) {
-//   // Test your code using external_flag_1 and external_flag_2 here.
-// }
-// INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest,
-//                          Combine(Bool(), Bool()));
-//
-template <typename... Generator>
-internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) {
-  return internal::CartesianProductHolder<Generator...>(g...);
-}
-
-#define TEST_P(test_suite_name, test_name)                                     \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                     \
-      : public test_suite_name {                                               \
-   public:                                                                     \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                    \
-    void TestBody() override;                                                  \
-                                                                               \
-   private:                                                                    \
-    static int AddToRegistry() {                                               \
-      ::testing::UnitTest::GetInstance()                                       \
-          ->parameterized_test_registry()                                      \
-          .GetTestSuitePatternHolder<test_suite_name>(                         \
-              GTEST_STRINGIFY_(test_suite_name),                               \
-              ::testing::internal::CodeLocation(__FILE__, __LINE__))           \
-          ->AddTestPattern(                                                    \
-              GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name),  \
-              new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \
-                  test_suite_name, test_name)>(),                              \
-              ::testing::internal::CodeLocation(__FILE__, __LINE__));          \
-      return 0;                                                                \
-    }                                                                          \
-    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_;               \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,    \
-                                                           test_name));        \
-  };                                                                           \
-  int GTEST_TEST_CLASS_NAME_(test_suite_name,                                  \
-                             test_name)::gtest_registering_dummy_ =            \
-      GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry();     \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-// The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify
-// generator and an optional function or functor that generates custom test name
-// suffixes based on the test parameters. Such a function or functor should
-// accept one argument of type testing::TestParamInfo<class ParamType>, and
-// return std::string.
-//
-// testing::PrintToStringParamName is a builtin test suffix generator that
-// returns the value of testing::PrintToString(GetParam()).
-//
-// Note: test names must be non-empty, unique, and may only contain ASCII
-// alphanumeric characters or underscore. Because PrintToString adds quotes
-// to std::string and C strings, it won't work for these types.
-
-#define GTEST_EXPAND_(arg) arg
-#define GTEST_GET_FIRST_(first, ...) first
-#define GTEST_GET_SECOND_(first, second, ...) second
-
-#define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...)                \
-  static ::testing::internal::ParamGenerator<test_suite_name::ParamType>      \
-      gtest_##prefix##test_suite_name##_EvalGenerator_() {                    \
-    return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_));        \
-  }                                                                           \
-  static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_(   \
-      const ::testing::TestParamInfo<test_suite_name::ParamType>& info) {     \
-    if (::testing::internal::AlwaysFalse()) {                                 \
-      ::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_(      \
-          __VA_ARGS__,                                                        \
-          ::testing::internal::DefaultParamName<test_suite_name::ParamType>,  \
-          DUMMY_PARAM_)));                                                    \
-      auto t = std::make_tuple(__VA_ARGS__);                                  \
-      static_assert(std::tuple_size<decltype(t)>::value <= 2,                 \
-                    "Too Many Args!");                                        \
-    }                                                                         \
-    return ((GTEST_EXPAND_(GTEST_GET_SECOND_(                                 \
-        __VA_ARGS__,                                                          \
-        ::testing::internal::DefaultParamName<test_suite_name::ParamType>,    \
-        DUMMY_PARAM_))))(info);                                               \
-  }                                                                           \
-  static int gtest_##prefix##test_suite_name##_dummy_                         \
-      GTEST_ATTRIBUTE_UNUSED_ =                                               \
-          ::testing::UnitTest::GetInstance()                                  \
-              ->parameterized_test_registry()                                 \
-              .GetTestSuitePatternHolder<test_suite_name>(                    \
-                  GTEST_STRINGIFY_(test_suite_name),                          \
-                  ::testing::internal::CodeLocation(__FILE__, __LINE__))      \
-              ->AddTestSuiteInstantiation(                                    \
-                  GTEST_STRINGIFY_(prefix),                                   \
-                  &gtest_##prefix##test_suite_name##_EvalGenerator_,          \
-                  &gtest_##prefix##test_suite_name##_EvalGenerateName_,       \
-                  __FILE__, __LINE__)
-
-
-// Allow Marking a Parameterized test class as not needing to be instantiated.
-#define GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(T)                   \
-  namespace gtest_do_not_use_outside_namespace_scope {}                   \
-  static const ::testing::internal::MarkAsIgnored gtest_allow_ignore_##T( \
-      GTEST_STRINGIFY_(T))
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TEST_CASE_P                                            \
-  static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \
-                "");                                                       \
-  INSTANTIATE_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-printers.h b/third_party/googletest/googletest/include/gtest/gtest-printers.h
deleted file mode 100644
index 978420e..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-printers.h
+++ /dev/null
@@ -1,1029 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// A user can teach this function how to print a class type T by
-// defining either operator<<() or PrintTo() in the namespace that
-// defines T.  More specifically, the FIRST defined function in the
-// following list will be used (assuming T is defined in namespace
-// foo):
-//
-//   1. foo::PrintTo(const T&, ostream*)
-//   2. operator<<(ostream&, const T&) defined in either foo or the
-//      global namespace.
-//
-// However if T is an STL-style container then it is printed element-wise
-// unless foo::PrintTo(const T&, ostream*) is defined. Note that
-// operator<<() is ignored for container types.
-//
-// If none of the above is defined, it will print the debug string of
-// the value if it is a protocol buffer, or print the raw bytes in the
-// value otherwise.
-//
-// To aid debugging: when T is a reference type, the address of the
-// value is also printed; when T is a (const) char pointer, both the
-// pointer value and the NUL-terminated string it points to are
-// printed.
-//
-// We also provide some convenient wrappers:
-//
-//   // Prints a value to a string.  For a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   std::string ::testing::PrintToString(const T& value);
-//
-//   // Prints a value tersely: for a reference type, the referenced
-//   // value (but not the address) is printed; for a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
-//
-//   // Prints value using the type inferred by the compiler.  The difference
-//   // from UniversalTersePrint() is that this function prints both the
-//   // pointer and the NUL-terminated string for a (const or not) char pointer.
-//   void ::testing::internal::UniversalPrint(const T& value, ostream*);
-//
-//   // Prints the fields of a tuple tersely to a string vector, one
-//   // element for each field. Tuple support must be enabled in
-//   // gtest-port.h.
-//   std::vector<string> UniversalTersePrintTupleFieldsToStrings(
-//       const Tuple& value);
-//
-// Known limitation:
-//
-// The print primitives print the elements of an STL-style container
-// using the compiler-inferred type of *iter where iter is a
-// const_iterator of the container.  When const_iterator is an input
-// iterator but not a forward iterator, this inferred type may not
-// match value_type, and the print output may be incorrect.  In
-// practice, this is rarely a problem as for most containers
-// const_iterator is a forward iterator.  We'll fix this if there's an
-// actual need for it.  Note that this fix cannot rely on value_type
-// being defined as many user-defined container types don't have
-// value_type.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-
-#include <functional>
-#include <memory>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-
-// Definitions in the internal* namespaces are subject to change without notice.
-// DO NOT USE THEM IN USER CODE!
-namespace internal {
-
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os);
-
-// Used to print an STL-style container when the user doesn't define
-// a PrintTo() for it.
-struct ContainerPrinter {
-  template <typename T,
-            typename = typename std::enable_if<
-                (sizeof(IsContainerTest<T>(0)) == sizeof(IsContainer)) &&
-                !IsRecursiveContainer<T>::value>::type>
-  static void PrintValue(const T& container, std::ostream* os) {
-    const size_t kMaxCount = 32;  // The maximum number of elements to print.
-    *os << '{';
-    size_t count = 0;
-    for (auto&& elem : container) {
-      if (count > 0) {
-        *os << ',';
-        if (count == kMaxCount) {  // Enough has been printed.
-          *os << " ...";
-          break;
-        }
-      }
-      *os << ' ';
-      // We cannot call PrintTo(elem, os) here as PrintTo() doesn't
-      // handle `elem` being a native array.
-      internal::UniversalPrint(elem, os);
-      ++count;
-    }
-
-    if (count > 0) {
-      *os << ' ';
-    }
-    *os << '}';
-  }
-};
-
-// Used to print a pointer that is neither a char pointer nor a member
-// pointer, when the user doesn't define PrintTo() for it.  (A member
-// variable pointer or member function pointer doesn't really point to
-// a location in the address space.  Their representation is
-// implementation-defined.  Therefore they will be printed as raw
-// bytes.)
-struct FunctionPointerPrinter {
-  template <typename T, typename = typename std::enable_if<
-                            std::is_function<T>::value>::type>
-  static void PrintValue(T* p, ::std::ostream* os) {
-    if (p == nullptr) {
-      *os << "NULL";
-    } else {
-      // T is a function type, so '*os << p' doesn't do what we want
-      // (it just prints p as bool).  We want to print p as a const
-      // void*.
-      *os << reinterpret_cast<const void*>(p);
-    }
-  }
-};
-
-struct PointerPrinter {
-  template <typename T>
-  static void PrintValue(T* p, ::std::ostream* os) {
-    if (p == nullptr) {
-      *os << "NULL";
-    } else {
-      // T is not a function type.  We just call << to print p,
-      // relying on ADL to pick up user-defined << for their pointer
-      // types, if any.
-      *os << p;
-    }
-  }
-};
-
-namespace internal_stream_operator_without_lexical_name_lookup {
-
-// The presence of an operator<< here will terminate lexical scope lookup
-// straight away (even though it cannot be a match because of its argument
-// types). Thus, the two operator<< calls in StreamPrinter will find only ADL
-// candidates.
-struct LookupBlocker {};
-void operator<<(LookupBlocker, LookupBlocker);
-
-struct StreamPrinter {
-  template <typename T,
-            // Don't accept member pointers here. We'd print them via implicit
-            // conversion to bool, which isn't useful.
-            typename = typename std::enable_if<
-                !std::is_member_pointer<T>::value>::type,
-            // Only accept types for which we can find a streaming operator via
-            // ADL (possibly involving implicit conversions).
-            typename = decltype(std::declval<std::ostream&>()
-                                << std::declval<const T&>())>
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    // Call streaming operator found by ADL, possibly with implicit conversions
-    // of the arguments.
-    *os << value;
-  }
-};
-
-}  // namespace internal_stream_operator_without_lexical_name_lookup
-
-struct ProtobufPrinter {
-  // We print a protobuf using its ShortDebugString() when the string
-  // doesn't exceed this many characters; otherwise we print it using
-  // DebugString() for better readability.
-  static const size_t kProtobufOneLinerMaxLength = 50;
-
-  template <typename T,
-            typename = typename std::enable_if<
-                internal::HasDebugStringAndShortDebugString<T>::value>::type>
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    std::string pretty_str = value.ShortDebugString();
-    if (pretty_str.length() > kProtobufOneLinerMaxLength) {
-      pretty_str = "\n" + value.DebugString();
-    }
-    *os << ("<" + pretty_str + ">");
-  }
-};
-
-struct ConvertibleToIntegerPrinter {
-  // Since T has no << operator or PrintTo() but can be implicitly
-  // converted to BiggestInt, we print it as a BiggestInt.
-  //
-  // Most likely T is an enum type (either named or unnamed), in which
-  // case printing it as an integer is the desired behavior.  In case
-  // T is not an enum, printing it as an integer is the best we can do
-  // given that it has no user-defined printer.
-  static void PrintValue(internal::BiggestInt value, ::std::ostream* os) {
-    *os << value;
-  }
-};
-
-struct ConvertibleToStringViewPrinter {
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  static void PrintValue(internal::StringView value, ::std::ostream* os) {
-    internal::UniversalPrint(value, os);
-  }
-#endif
-};
-
-
-// Prints the given number of bytes in the given object to the given
-// ostream.
-GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
-                                     size_t count,
-                                     ::std::ostream* os);
-struct RawBytesPrinter {
-  // SFINAE on `sizeof` to make sure we have a complete type.
-  template <typename T, size_t = sizeof(T)>
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    PrintBytesInObjectTo(
-        static_cast<const unsigned char*>(
-            // Load bearing cast to void* to support iOS
-            reinterpret_cast<const void*>(std::addressof(value))),
-        sizeof(value), os);
-  }
-};
-
-struct FallbackPrinter {
-  template <typename T>
-  static void PrintValue(const T&, ::std::ostream* os) {
-    *os << "(incomplete type)";
-  }
-};
-
-// Try every printer in order and return the first one that works.
-template <typename T, typename E, typename Printer, typename... Printers>
-struct FindFirstPrinter : FindFirstPrinter<T, E, Printers...> {};
-
-template <typename T, typename Printer, typename... Printers>
-struct FindFirstPrinter<
-    T, decltype(Printer::PrintValue(std::declval<const T&>(), nullptr)),
-    Printer, Printers...> {
-  using type = Printer;
-};
-
-// Select the best printer in the following order:
-//  - Print containers (they have begin/end/etc).
-//  - Print function pointers.
-//  - Print object pointers.
-//  - Use the stream operator, if available.
-//  - Print protocol buffers.
-//  - Print types convertible to BiggestInt.
-//  - Print types convertible to StringView, if available.
-//  - Fallback to printing the raw bytes of the object.
-template <typename T>
-void PrintWithFallback(const T& value, ::std::ostream* os) {
-  using Printer = typename FindFirstPrinter<
-      T, void, ContainerPrinter, FunctionPointerPrinter, PointerPrinter,
-      internal_stream_operator_without_lexical_name_lookup::StreamPrinter,
-      ProtobufPrinter, ConvertibleToIntegerPrinter,
-      ConvertibleToStringViewPrinter, RawBytesPrinter, FallbackPrinter>::type;
-  Printer::PrintValue(value, os);
-}
-
-// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
-// value of type ToPrint that is an operand of a comparison assertion
-// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
-// the comparison, and is used to help determine the best way to
-// format the value.  In particular, when the value is a C string
-// (char pointer) and the other operand is an STL string object, we
-// want to format the C string as a string, since we know it is
-// compared by value with the string object.  If the value is a char
-// pointer but the other operand is not an STL string object, we don't
-// know whether the pointer is supposed to point to a NUL-terminated
-// string, and thus want to print it as a pointer to be safe.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// The default case.
-template <typename ToPrint, typename OtherOperand>
-class FormatForComparison {
- public:
-  static ::std::string Format(const ToPrint& value) {
-    return ::testing::PrintToString(value);
-  }
-};
-
-// Array.
-template <typename ToPrint, size_t N, typename OtherOperand>
-class FormatForComparison<ToPrint[N], OtherOperand> {
- public:
-  static ::std::string Format(const ToPrint* value) {
-    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
-  }
-};
-
-// By default, print C string as pointers to be safe, as we don't know
-// whether they actually point to a NUL-terminated string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
-  template <typename OtherOperand>                                      \
-  class FormatForComparison<CharType*, OtherOperand> {                  \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(static_cast<const void*>(value)); \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
-#ifdef __cpp_char8_t
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char8_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char8_t);
-#endif
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char16_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char16_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char32_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char32_t);
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
-
-// If a C string is compared with an STL string object, we know it's meant
-// to point to a NUL-terminated string, and thus can print it as a string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
-  template <>                                                           \
-  class FormatForComparison<CharType*, OtherStringType> {               \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(value);                           \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
-#ifdef __cpp_char8_t
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char8_t, ::std::u8string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char8_t, ::std::u8string);
-#endif
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char16_t, ::std::u16string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char16_t, ::std::u16string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char32_t, ::std::u32string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char32_t, ::std::u32string);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
-#endif
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
-
-// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
-// operand to be used in a failure message.  The type (but not value)
-// of the other operand may affect the format.  This allows us to
-// print a char* as a raw pointer when it is compared against another
-// char* or void*, and print it as a C string when it is compared
-// against an std::string object, for example.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename T1, typename T2>
-std::string FormatForComparisonFailureMessage(
-    const T1& value, const T2& /* other_operand */) {
-  return FormatForComparison<T1, T2>::Format(value);
-}
-
-// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
-// value to the given ostream.  The caller must ensure that
-// 'ostream_ptr' is not NULL, or the behavior is undefined.
-//
-// We define UniversalPrinter as a class template (as opposed to a
-// function template), as we need to partially specialize it for
-// reference types, which cannot be done with function templates.
-template <typename T>
-class UniversalPrinter;
-
-// Prints the given value using the << operator if it has one;
-// otherwise prints the bytes in it.  This is what
-// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
-// or overloaded for type T.
-//
-// A user can override this behavior for a class type Foo by defining
-// an overload of PrintTo() in the namespace where Foo is defined.  We
-// give the user this option as sometimes defining a << operator for
-// Foo is not desirable (e.g. the coding style may prevent doing it,
-// or there is already a << operator but it doesn't do what the user
-// wants).
-template <typename T>
-void PrintTo(const T& value, ::std::ostream* os) {
-  internal::PrintWithFallback(value, os);
-}
-
-// The following list of PrintTo() overloads tells
-// UniversalPrinter<T>::Print() how to print standard types (built-in
-// types, strings, plain arrays, and pointers).
-
-// Overloads for various char types.
-GTEST_API_ void PrintTo(unsigned char c, ::std::ostream* os);
-GTEST_API_ void PrintTo(signed char c, ::std::ostream* os);
-inline void PrintTo(char c, ::std::ostream* os) {
-  // When printing a plain char, we always treat it as unsigned.  This
-  // way, the output won't be affected by whether the compiler thinks
-  // char is signed or not.
-  PrintTo(static_cast<unsigned char>(c), os);
-}
-
-// Overloads for other simple built-in types.
-inline void PrintTo(bool x, ::std::ostream* os) {
-  *os << (x ? "true" : "false");
-}
-
-// Overload for wchar_t type.
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its decimal code (except for L'\0').
-// The L'\0' char is printed as "L'\\0'". The decimal code is printed
-// as signed integer when wchar_t is implemented by the compiler
-// as a signed type and is printed as an unsigned integer when wchar_t
-// is implemented as an unsigned type.
-GTEST_API_ void PrintTo(wchar_t wc, ::std::ostream* os);
-
-GTEST_API_ void PrintTo(char32_t c, ::std::ostream* os);
-inline void PrintTo(char16_t c, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<char32_t>(c), os);
-}
-#ifdef __cpp_char8_t
-inline void PrintTo(char8_t c, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<char32_t>(c), os);
-}
-#endif
-
-// Overloads for C strings.
-GTEST_API_ void PrintTo(const char* s, ::std::ostream* os);
-inline void PrintTo(char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char*>(s), os);
-}
-
-// signed/unsigned char is often used for representing binary data, so
-// we print pointers to it as void* to be safe.
-inline void PrintTo(const signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-#ifdef __cpp_char8_t
-// Overloads for u8 strings.
-void PrintTo(const char8_t* s, ::std::ostream* os);
-inline void PrintTo(char8_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char8_t*>(s), os);
-}
-#endif
-// Overloads for u16 strings.
-void PrintTo(const char16_t* s, ::std::ostream* os);
-inline void PrintTo(char16_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char16_t*>(s), os);
-}
-// Overloads for u32 strings.
-void PrintTo(const char32_t* s, ::std::ostream* os);
-inline void PrintTo(char32_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char32_t*>(s), os);
-}
-
-// MSVC can be configured to define wchar_t as a typedef of unsigned
-// short.  It defines _NATIVE_WCHAR_T_DEFINED when wchar_t is a native
-// type.  When wchar_t is a typedef, defining an overload for const
-// wchar_t* would cause unsigned short* be printed as a wide string,
-// possibly causing invalid memory accesses.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Overloads for wide C strings
-GTEST_API_ void PrintTo(const wchar_t* s, ::std::ostream* os);
-inline void PrintTo(wchar_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const wchar_t*>(s), os);
-}
-#endif
-
-// Overload for C arrays.  Multi-dimensional arrays are printed
-// properly.
-
-// Prints the given number of elements in an array, without printing
-// the curly braces.
-template <typename T>
-void PrintRawArrayTo(const T a[], size_t count, ::std::ostream* os) {
-  UniversalPrint(a[0], os);
-  for (size_t i = 1; i != count; i++) {
-    *os << ", ";
-    UniversalPrint(a[i], os);
-  }
-}
-
-// Overloads for ::std::string.
-GTEST_API_ void PrintStringTo(const ::std::string&s, ::std::ostream* os);
-inline void PrintTo(const ::std::string& s, ::std::ostream* os) {
-  PrintStringTo(s, os);
-}
-
-// Overloads for ::std::u8string
-#ifdef __cpp_char8_t
-GTEST_API_ void PrintU8StringTo(const ::std::u8string& s, ::std::ostream* os);
-inline void PrintTo(const ::std::u8string& s, ::std::ostream* os) {
-  PrintU8StringTo(s, os);
-}
-#endif
-
-// Overloads for ::std::u16string
-GTEST_API_ void PrintU16StringTo(const ::std::u16string& s, ::std::ostream* os);
-inline void PrintTo(const ::std::u16string& s, ::std::ostream* os) {
-  PrintU16StringTo(s, os);
-}
-
-// Overloads for ::std::u32string
-GTEST_API_ void PrintU32StringTo(const ::std::u32string& s, ::std::ostream* os);
-inline void PrintTo(const ::std::u32string& s, ::std::ostream* os) {
-  PrintU32StringTo(s, os);
-}
-
-// Overloads for ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ void PrintWideStringTo(const ::std::wstring&s, ::std::ostream* os);
-inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
-  PrintWideStringTo(s, os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// Overload for internal::StringView.
-inline void PrintTo(internal::StringView sp, ::std::ostream* os) {
-  PrintTo(::std::string(sp), os);
-}
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-inline void PrintTo(std::nullptr_t, ::std::ostream* os) { *os << "(nullptr)"; }
-
-template <typename T>
-void PrintTo(std::reference_wrapper<T> ref, ::std::ostream* os) {
-  UniversalPrinter<T&>::Print(ref.get(), os);
-}
-
-inline const void* VoidifyPointer(const void* p) { return p; }
-inline const void* VoidifyPointer(volatile const void* p) {
-  return const_cast<const void*>(p);
-}
-
-template <typename T, typename Ptr>
-void PrintSmartPointer(const Ptr& ptr, std::ostream* os, char) {
-  if (ptr == nullptr) {
-    *os << "(nullptr)";
-  } else {
-    // We can't print the value. Just print the pointer..
-    *os << "(" << (VoidifyPointer)(ptr.get()) << ")";
-  }
-}
-template <typename T, typename Ptr,
-          typename = typename std::enable_if<!std::is_void<T>::value &&
-                                             !std::is_array<T>::value>::type>
-void PrintSmartPointer(const Ptr& ptr, std::ostream* os, int) {
-  if (ptr == nullptr) {
-    *os << "(nullptr)";
-  } else {
-    *os << "(ptr = " << (VoidifyPointer)(ptr.get()) << ", value = ";
-    UniversalPrinter<T>::Print(*ptr, os);
-    *os << ")";
-  }
-}
-
-template <typename T, typename D>
-void PrintTo(const std::unique_ptr<T, D>& ptr, std::ostream* os) {
-  (PrintSmartPointer<T>)(ptr, os, 0);
-}
-
-template <typename T>
-void PrintTo(const std::shared_ptr<T>& ptr, std::ostream* os) {
-  (PrintSmartPointer<T>)(ptr, os, 0);
-}
-
-// Helper function for printing a tuple.  T must be instantiated with
-// a tuple type.
-template <typename T>
-void PrintTupleTo(const T&, std::integral_constant<size_t, 0>,
-                  ::std::ostream*) {}
-
-template <typename T, size_t I>
-void PrintTupleTo(const T& t, std::integral_constant<size_t, I>,
-                  ::std::ostream* os) {
-  PrintTupleTo(t, std::integral_constant<size_t, I - 1>(), os);
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (I > 1) {
-    GTEST_INTENTIONAL_CONST_COND_POP_()
-    *os << ", ";
-  }
-  UniversalPrinter<typename std::tuple_element<I - 1, T>::type>::Print(
-      std::get<I - 1>(t), os);
-}
-
-template <typename... Types>
-void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) {
-  *os << "(";
-  PrintTupleTo(t, std::integral_constant<size_t, sizeof...(Types)>(), os);
-  *os << ")";
-}
-
-// Overload for std::pair.
-template <typename T1, typename T2>
-void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
-  *os << '(';
-  // We cannot use UniversalPrint(value.first, os) here, as T1 may be
-  // a reference type.  The same for printing value.second.
-  UniversalPrinter<T1>::Print(value.first, os);
-  *os << ", ";
-  UniversalPrinter<T2>::Print(value.second, os);
-  *os << ')';
-}
-
-// Implements printing a non-reference type T by letting the compiler
-// pick the right overload of PrintTo() for T.
-template <typename T>
-class UniversalPrinter {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  // Note: we deliberately don't call this PrintTo(), as that name
-  // conflicts with ::testing::internal::PrintTo in the body of the
-  // function.
-  static void Print(const T& value, ::std::ostream* os) {
-    // By default, ::testing::internal::PrintTo() is used for printing
-    // the value.
-    //
-    // Thanks to Koenig look-up, if T is a class and has its own
-    // PrintTo() function defined in its namespace, that function will
-    // be visible here.  Since it is more specific than the generic ones
-    // in ::testing::internal, it will be picked by the compiler in the
-    // following statement - exactly what we want.
-    PrintTo(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-// Remove any const-qualifiers before passing a type to UniversalPrinter.
-template <typename T>
-class UniversalPrinter<const T> : public UniversalPrinter<T> {};
-
-#if GTEST_INTERNAL_HAS_ANY
-
-// Printer for std::any / absl::any
-
-template <>
-class UniversalPrinter<Any> {
- public:
-  static void Print(const Any& value, ::std::ostream* os) {
-    if (value.has_value()) {
-      *os << "value of type " << GetTypeName(value);
-    } else {
-      *os << "no value";
-    }
-  }
-
- private:
-  static std::string GetTypeName(const Any& value) {
-#if GTEST_HAS_RTTI
-    return internal::GetTypeName(value.type());
-#else
-    static_cast<void>(value);  // possibly unused
-    return "<unknown_type>";
-#endif  // GTEST_HAS_RTTI
-  }
-};
-
-#endif  // GTEST_INTERNAL_HAS_ANY
-
-#if GTEST_INTERNAL_HAS_OPTIONAL
-
-// Printer for std::optional / absl::optional
-
-template <typename T>
-class UniversalPrinter<Optional<T>> {
- public:
-  static void Print(const Optional<T>& value, ::std::ostream* os) {
-    *os << '(';
-    if (!value) {
-      *os << "nullopt";
-    } else {
-      UniversalPrint(*value, os);
-    }
-    *os << ')';
-  }
-};
-
-#endif  // GTEST_INTERNAL_HAS_OPTIONAL
-
-#if GTEST_INTERNAL_HAS_VARIANT
-
-// Printer for std::variant / absl::variant
-
-template <typename... T>
-class UniversalPrinter<Variant<T...>> {
- public:
-  static void Print(const Variant<T...>& value, ::std::ostream* os) {
-    *os << '(';
-#if GTEST_HAS_ABSL
-    absl::visit(Visitor{os, value.index()}, value);
-#else
-    std::visit(Visitor{os, value.index()}, value);
-#endif  // GTEST_HAS_ABSL
-    *os << ')';
-  }
-
- private:
-  struct Visitor {
-    template <typename U>
-    void operator()(const U& u) const {
-      *os << "'" << GetTypeName<U>() << "(index = " << index
-          << ")' with value ";
-      UniversalPrint(u, os);
-    }
-    ::std::ostream* os;
-    std::size_t index;
-  };
-};
-
-#endif  // GTEST_INTERNAL_HAS_VARIANT
-
-// UniversalPrintArray(begin, len, os) prints an array of 'len'
-// elements, starting at address 'begin'.
-template <typename T>
-void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
-  if (len == 0) {
-    *os << "{}";
-  } else {
-    *os << "{ ";
-    const size_t kThreshold = 18;
-    const size_t kChunkSize = 8;
-    // If the array has more than kThreshold elements, we'll have to
-    // omit some details by printing only the first and the last
-    // kChunkSize elements.
-    if (len <= kThreshold) {
-      PrintRawArrayTo(begin, len, os);
-    } else {
-      PrintRawArrayTo(begin, kChunkSize, os);
-      *os << ", ..., ";
-      PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
-    }
-    *os << " }";
-  }
-}
-// This overload prints a (const) char array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const char* begin, size_t len, ::std::ostream* os);
-
-#ifdef __cpp_char8_t
-// This overload prints a (const) char8_t array compactly.
-GTEST_API_ void UniversalPrintArray(const char8_t* begin, size_t len,
-                                    ::std::ostream* os);
-#endif
-
-// This overload prints a (const) char16_t array compactly.
-GTEST_API_ void UniversalPrintArray(const char16_t* begin, size_t len,
-                                    ::std::ostream* os);
-
-// This overload prints a (const) char32_t array compactly.
-GTEST_API_ void UniversalPrintArray(const char32_t* begin, size_t len,
-                                    ::std::ostream* os);
-
-// This overload prints a (const) wchar_t array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const wchar_t* begin, size_t len, ::std::ostream* os);
-
-// Implements printing an array type T[N].
-template <typename T, size_t N>
-class UniversalPrinter<T[N]> {
- public:
-  // Prints the given array, omitting some elements when there are too
-  // many.
-  static void Print(const T (&a)[N], ::std::ostream* os) {
-    UniversalPrintArray(a, N, os);
-  }
-};
-
-// Implements printing a reference type T&.
-template <typename T>
-class UniversalPrinter<T&> {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  static void Print(const T& value, ::std::ostream* os) {
-    // Prints the address of the value.  We use reinterpret_cast here
-    // as static_cast doesn't compile when T is a function type.
-    *os << "@" << reinterpret_cast<const void*>(&value) << " ";
-
-    // Then prints the value itself.
-    UniversalPrint(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-// Prints a value tersely: for a reference type, the referenced value
-// (but not the address) is printed; for a (const) char pointer, the
-// NUL-terminated string (but not the pointer) is printed.
-
-template <typename T>
-class UniversalTersePrinter {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T>
-class UniversalTersePrinter<T&> {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T, size_t N>
-class UniversalTersePrinter<T[N]> {
- public:
-  static void Print(const T (&value)[N], ::std::ostream* os) {
-    UniversalPrinter<T[N]>::Print(value, os);
-  }
-};
-template <>
-class UniversalTersePrinter<const char*> {
- public:
-  static void Print(const char* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(std::string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char*> : public UniversalTersePrinter<const char*> {
-};
-
-#ifdef __cpp_char8_t
-template <>
-class UniversalTersePrinter<const char8_t*> {
- public:
-  static void Print(const char8_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::u8string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char8_t*>
-    : public UniversalTersePrinter<const char8_t*> {};
-#endif
-
-template <>
-class UniversalTersePrinter<const char16_t*> {
- public:
-  static void Print(const char16_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::u16string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char16_t*>
-    : public UniversalTersePrinter<const char16_t*> {};
-
-template <>
-class UniversalTersePrinter<const char32_t*> {
- public:
-  static void Print(const char32_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::u32string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char32_t*>
-    : public UniversalTersePrinter<const char32_t*> {};
-
-#if GTEST_HAS_STD_WSTRING
-template <>
-class UniversalTersePrinter<const wchar_t*> {
- public:
-  static void Print(const wchar_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::wstring(str), os);
-    }
-  }
-};
-#endif
-
-template <>
-class UniversalTersePrinter<wchar_t*> {
- public:
-  static void Print(wchar_t* str, ::std::ostream* os) {
-    UniversalTersePrinter<const wchar_t*>::Print(str, os);
-  }
-};
-
-template <typename T>
-void UniversalTersePrint(const T& value, ::std::ostream* os) {
-  UniversalTersePrinter<T>::Print(value, os);
-}
-
-// Prints a value using the type inferred by the compiler.  The
-// difference between this and UniversalTersePrint() is that for a
-// (const) char pointer, this prints both the pointer and the
-// NUL-terminated string.
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os) {
-  // A workarond for the bug in VC++ 7.1 that prevents us from instantiating
-  // UniversalPrinter with T directly.
-  typedef T T1;
-  UniversalPrinter<T1>::Print(value, os);
-}
-
-typedef ::std::vector< ::std::string> Strings;
-
-  // Tersely prints the first N fields of a tuple to a string vector,
-  // one element for each field.
-template <typename Tuple>
-void TersePrintPrefixToStrings(const Tuple&, std::integral_constant<size_t, 0>,
-                               Strings*) {}
-template <typename Tuple, size_t I>
-void TersePrintPrefixToStrings(const Tuple& t,
-                               std::integral_constant<size_t, I>,
-                               Strings* strings) {
-  TersePrintPrefixToStrings(t, std::integral_constant<size_t, I - 1>(),
-                            strings);
-  ::std::stringstream ss;
-  UniversalTersePrint(std::get<I - 1>(t), &ss);
-  strings->push_back(ss.str());
-}
-
-// Prints the fields of a tuple tersely to a string vector, one
-// element for each field.  See the comment before
-// UniversalTersePrint() for how we define "tersely".
-template <typename Tuple>
-Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
-  Strings result;
-  TersePrintPrefixToStrings(
-      value, std::integral_constant<size_t, std::tuple_size<Tuple>::value>(),
-      &result);
-  return result;
-}
-
-}  // namespace internal
-
-template <typename T>
-::std::string PrintToString(const T& value) {
-  ::std::stringstream ss;
-  internal::UniversalTersePrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-}  // namespace testing
-
-// Include any custom printer added by the local installation.
-// We must include this header at the end to make sure it can use the
-// declarations from this file.
-#include "gtest/internal/custom/gtest-printers.h"
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-spi.h b/third_party/googletest/googletest/include/gtest/gtest-spi.h
deleted file mode 100644
index eacef44..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-spi.h
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Utilities for testing Google Test itself and code that uses Google Test
-// (e.g. frameworks built on top of Google Test).
-
-// GOOGLETEST_CM0004 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-
-#include "gtest/gtest.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// This helper class can be used to mock out Google Test failure reporting
-// so that we can test Google Test or code that builds on Google Test.
-//
-// An object of this class appends a TestPartResult object to the
-// TestPartResultArray object given in the constructor whenever a Google Test
-// failure is reported. It can either intercept only failures that are
-// generated in the same thread that created this object or it can intercept
-// all generated failures. The scope of this mock object can be controlled with
-// the second argument to the two arguments constructor.
-class GTEST_API_ ScopedFakeTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  // The two possible mocking modes of this object.
-  enum InterceptMode {
-    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
-    INTERCEPT_ALL_THREADS           // Intercepts all failures.
-  };
-
-  // The c'tor sets this object as the test part result reporter used
-  // by Google Test.  The 'result' parameter specifies where to report the
-  // results. This reporter will only catch failures generated in the current
-  // thread. DEPRECATED
-  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
-
-  // Same as above, but you can choose the interception scope of this object.
-  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
-                                   TestPartResultArray* result);
-
-  // The d'tor restores the previous test part result reporter.
-  ~ScopedFakeTestPartResultReporter() override;
-
-  // Appends the TestPartResult object to the TestPartResultArray
-  // received in the constructor.
-  //
-  // This method is from the TestPartResultReporterInterface
-  // interface.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  void Init();
-
-  const InterceptMode intercept_mode_;
-  TestPartResultReporterInterface* old_reporter_;
-  TestPartResultArray* const result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
-};
-
-namespace internal {
-
-// A helper class for implementing EXPECT_FATAL_FAILURE() and
-// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-class GTEST_API_ SingleFailureChecker {
- public:
-  // The constructor remembers the arguments.
-  SingleFailureChecker(const TestPartResultArray* results,
-                       TestPartResult::Type type, const std::string& substr);
-  ~SingleFailureChecker();
- private:
-  const TestPartResultArray* const results_;
-  const TestPartResult::Type type_;
-  const std::string substr_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// A set of macros for testing Google Test assertions or code that's expected
-// to generate Google Test fatal failures.  It verifies that the given
-// statement will cause exactly one fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - 'statement' cannot reference local non-static variables or
-//     non-static members of the current object.
-//   - 'statement' cannot return a value.
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
-// gtest_unittest.cc will fail to compile if we do that.
-#define EXPECT_FATAL_FAILURE(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ALL_THREADS, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-// A macro for testing Google Test assertions or code that's expected to
-// generate Google Test non-fatal failures.  It asserts that the given
-// statement will cause exactly one non-fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// 'statement' is allowed to reference local variables and members of
-// the current object.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  If we do that, the code won't compile when the user gives
-// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
-// expands to code containing an unprotected comma.  The
-// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
-// catches that.
-//
-// For the same reason, we have to write
-//   if (::testing::internal::AlwaysTrue()) { statement; }
-// instead of
-//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-// to avoid an MSVC warning on unreachable code.
-#define EXPECT_NONFATAL_FAILURE(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
-          &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-test-part.h b/third_party/googletest/googletest/include/gtest/gtest-test-part.h
deleted file mode 100644
index 203fdf9..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-test-part.h
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-
-#include <iosfwd>
-#include <vector>
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// A copyable object representing the result of a test part (i.e. an
-// assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).
-//
-// Don't inherit from TestPartResult as its destructor is not virtual.
-class GTEST_API_ TestPartResult {
- public:
-  // The possible outcomes of a test part (i.e. an assertion or an
-  // explicit SUCCEED(), FAIL(), or ADD_FAILURE()).
-  enum Type {
-    kSuccess,          // Succeeded.
-    kNonFatalFailure,  // Failed but the test can continue.
-    kFatalFailure,     // Failed and the test should be terminated.
-    kSkip              // Skipped.
-  };
-
-  // C'tor.  TestPartResult does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestPartResult object.
-  TestPartResult(Type a_type, const char* a_file_name, int a_line_number,
-                 const char* a_message)
-      : type_(a_type),
-        file_name_(a_file_name == nullptr ? "" : a_file_name),
-        line_number_(a_line_number),
-        summary_(ExtractSummary(a_message)),
-        message_(a_message) {}
-
-  // Gets the outcome of the test part.
-  Type type() const { return type_; }
-
-  // Gets the name of the source file where the test part took place, or
-  // NULL if it's unknown.
-  const char* file_name() const {
-    return file_name_.empty() ? nullptr : file_name_.c_str();
-  }
-
-  // Gets the line in the source file where the test part took place,
-  // or -1 if it's unknown.
-  int line_number() const { return line_number_; }
-
-  // Gets the summary of the failure message.
-  const char* summary() const { return summary_.c_str(); }
-
-  // Gets the message associated with the test part.
-  const char* message() const { return message_.c_str(); }
-
-  // Returns true if and only if the test part was skipped.
-  bool skipped() const { return type_ == kSkip; }
-
-  // Returns true if and only if the test part passed.
-  bool passed() const { return type_ == kSuccess; }
-
-  // Returns true if and only if the test part non-fatally failed.
-  bool nonfatally_failed() const { return type_ == kNonFatalFailure; }
-
-  // Returns true if and only if the test part fatally failed.
-  bool fatally_failed() const { return type_ == kFatalFailure; }
-
-  // Returns true if and only if the test part failed.
-  bool failed() const { return fatally_failed() || nonfatally_failed(); }
-
- private:
-  Type type_;
-
-  // Gets the summary of the failure message by omitting the stack
-  // trace in it.
-  static std::string ExtractSummary(const char* message);
-
-  // The name of the source file where the test part took place, or
-  // "" if the source file is unknown.
-  std::string file_name_;
-  // The line in the source file where the test part took place, or -1
-  // if the line number is unknown.
-  int line_number_;
-  std::string summary_;  // The test failure summary.
-  std::string message_;  // The test failure message.
-};
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result);
-
-// An array of TestPartResult objects.
-//
-// Don't inherit from TestPartResultArray as its destructor is not
-// virtual.
-class GTEST_API_ TestPartResultArray {
- public:
-  TestPartResultArray() {}
-
-  // Appends the given TestPartResult to the array.
-  void Append(const TestPartResult& result);
-
-  // Returns the TestPartResult at the given index (0-based).
-  const TestPartResult& GetTestPartResult(int index) const;
-
-  // Returns the number of TestPartResult objects in the array.
-  int size() const;
-
- private:
-  std::vector<TestPartResult> array_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestPartResultArray);
-};
-
-// This interface knows how to report a test part result.
-class GTEST_API_ TestPartResultReporterInterface {
- public:
-  virtual ~TestPartResultReporterInterface() {}
-
-  virtual void ReportTestPartResult(const TestPartResult& result) = 0;
-};
-
-namespace internal {
-
-// This helper class is used by {ASSERT|EXPECT}_NO_FATAL_FAILURE to check if a
-// statement generates new fatal failures. To do so it registers itself as the
-// current test part result reporter. Besides checking if fatal failures were
-// reported, it only delegates the reporting to the former result reporter.
-// The original result reporter is restored in the destructor.
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-class GTEST_API_ HasNewFatalFailureHelper
-    : public TestPartResultReporterInterface {
- public:
-  HasNewFatalFailureHelper();
-  ~HasNewFatalFailureHelper() override;
-  void ReportTestPartResult(const TestPartResult& result) override;
-  bool has_new_fatal_failure() const { return has_new_fatal_failure_; }
- private:
-  bool has_new_fatal_failure_;
-  TestPartResultReporterInterface* original_reporter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(HasNewFatalFailureHelper);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest-typed-test.h b/third_party/googletest/googletest/include/gtest/gtest-typed-test.h
deleted file mode 100644
index 9fdc6be..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest-typed-test.h
+++ /dev/null
@@ -1,329 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-
-// This header implements typed tests and type-parameterized tests.
-
-// Typed (aka type-driven) tests repeat the same test for types in a
-// list.  You must know which types you want to test with when writing
-// typed tests. Here's how you do it:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
- public:
-  ...
-  typedef std::list<T> List;
-  static T shared_;
-  T value_;
-};
-
-// Next, associate a list of types with the test suite, which will be
-// repeated for each type in the list.  The typedef is necessary for
-// the macro to parse correctly.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   TYPED_TEST_SUITE(FooTest, int);
-
-// Then, use TYPED_TEST() instead of TEST_F() to define as many typed
-// tests for this test suite as you want.
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the TestFixture::
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the "typename
-  // TestFixture::" prefix.
-  typename TestFixture::List values;
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-
-// TYPED_TEST_SUITE takes an optional third argument which allows to specify a
-// class that generates custom test name suffixes based on the type. This should
-// be a class which has a static template function GetName(int index) returning
-// a string for each type. The provided integer index equals the index of the
-// type in the provided type list. In many cases the index can be ignored.
-//
-// For example:
-//   class MyTypeNames {
-//    public:
-//     template <typename T>
-//     static std::string GetName(int) {
-//       if (std::is_same<T, char>()) return "char";
-//       if (std::is_same<T, int>()) return "int";
-//       if (std::is_same<T, unsigned int>()) return "unsignedInt";
-//     }
-//   };
-//   TYPED_TEST_SUITE(FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-// Type-parameterized tests are abstract test patterns parameterized
-// by a type.  Compared with typed tests, type-parameterized tests
-// allow you to define the test pattern without knowing what the type
-// parameters are.  The defined pattern can be instantiated with
-// different types any number of times, in any number of translation
-// units.
-//
-// If you are designing an interface or concept, you can define a
-// suite of type-parameterized tests to verify properties that any
-// valid implementation of the interface/concept should have.  Then,
-// each implementation can easily instantiate the test suite to verify
-// that it conforms to the requirements, without having to write
-// similar tests repeatedly.  Here's an example:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
-  ...
-};
-
-// Next, declare that you will define a type-parameterized test suite
-// (the _P suffix is for "parameterized" or "pattern", whichever you
-// prefer):
-TYPED_TEST_SUITE_P(FooTest);
-
-// Then, use TYPED_TEST_P() to define as many type-parameterized tests
-// for this type-parameterized test suite as you want.
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-
-// Now the tricky part: you need to register all test patterns before
-// you can instantiate them.  The first argument of the macro is the
-// test suite name; the rest are the names of the tests in this test
-// case.
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-
-// Finally, you are free to instantiate the pattern with the types you
-// want.  If you put the above code in a header file, you can #include
-// it in multiple C++ source files and instantiate it multiple times.
-//
-// To distinguish different instances of the pattern, the first
-// argument to the INSTANTIATE_* macro is a prefix that will be added
-// to the actual test suite name.  Remember to pick unique prefixes for
-// different instances.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-//
-// Similar to the optional argument of TYPED_TEST_SUITE above,
-// INSTANTIATE_TEST_SUITE_P takes an optional fourth argument which allows to
-// generate custom names.
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/internal/gtest-type-util.h"
-
-// Implements typed tests.
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the typedef for the type parameters of the
-// given test suite.
-#define GTEST_TYPE_PARAMS_(TestSuiteName) gtest_type_params_##TestSuiteName##_
-
-// Expands to the name of the typedef for the NameGenerator, responsible for
-// creating the suffixes of the name.
-#define GTEST_NAME_GENERATOR_(TestSuiteName) \
-  gtest_type_params_##TestSuiteName##_NameGenerator
-
-#define TYPED_TEST_SUITE(CaseName, Types, ...)                          \
-  typedef ::testing::internal::GenerateTypeList<Types>::type            \
-      GTEST_TYPE_PARAMS_(CaseName);                                     \
-  typedef ::testing::internal::NameGeneratorSelector<__VA_ARGS__>::type \
-      GTEST_NAME_GENERATOR_(CaseName)
-
-#define TYPED_TEST(CaseName, TestName)                                        \
-  static_assert(sizeof(GTEST_STRINGIFY_(TestName)) > 1,                       \
-                "test-name must not be empty");                               \
-  template <typename gtest_TypeParam_>                                        \
-  class GTEST_TEST_CLASS_NAME_(CaseName, TestName)                            \
-      : public CaseName<gtest_TypeParam_> {                                   \
-   private:                                                                   \
-    typedef CaseName<gtest_TypeParam_> TestFixture;                           \
-    typedef gtest_TypeParam_ TypeParam;                                       \
-    void TestBody() override;                                                 \
-  };                                                                          \
-  static bool gtest_##CaseName##_##TestName##_registered_                     \
-      GTEST_ATTRIBUTE_UNUSED_ = ::testing::internal::TypeParameterizedTest<   \
-          CaseName,                                                           \
-          ::testing::internal::TemplateSel<GTEST_TEST_CLASS_NAME_(CaseName,   \
-                                                                  TestName)>, \
-          GTEST_TYPE_PARAMS_(                                                 \
-              CaseName)>::Register("",                                        \
-                                   ::testing::internal::CodeLocation(         \
-                                       __FILE__, __LINE__),                   \
-                                   GTEST_STRINGIFY_(CaseName),                \
-                                   GTEST_STRINGIFY_(TestName), 0,             \
-                                   ::testing::internal::GenerateNames<        \
-                                       GTEST_NAME_GENERATOR_(CaseName),       \
-                                       GTEST_TYPE_PARAMS_(CaseName)>());      \
-  template <typename gtest_TypeParam_>                                        \
-  void GTEST_TEST_CLASS_NAME_(CaseName,                                       \
-                              TestName)<gtest_TypeParam_>::TestBody()
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE                                                \
-  static_assert(::testing::internal::TypedTestCaseIsDeprecated(), ""); \
-  TYPED_TEST_SUITE
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Implements type-parameterized tests.
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the namespace name that the type-parameterized tests for
-// the given type-parameterized test suite are defined in.  The exact
-// name of the namespace is subject to change without notice.
-#define GTEST_SUITE_NAMESPACE_(TestSuiteName) gtest_suite_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the variable used to remember the names of
-// the defined tests in the given test suite.
-#define GTEST_TYPED_TEST_SUITE_P_STATE_(TestSuiteName) \
-  gtest_typed_test_suite_p_state_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE DIRECTLY.
-//
-// Expands to the name of the variable used to remember the names of
-// the registered tests in the given test suite.
-#define GTEST_REGISTERED_TEST_NAMES_(TestSuiteName) \
-  gtest_registered_test_names_##TestSuiteName##_
-
-// The variables defined in the type-parameterized test macros are
-// static as typically these macros are used in a .h file that can be
-// #included in multiple translation units linked together.
-#define TYPED_TEST_SUITE_P(SuiteName)              \
-  static ::testing::internal::TypedTestSuitePState \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE_P                                                 \
-  static_assert(::testing::internal::TypedTestCase_P_IsDeprecated(), ""); \
-  TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define TYPED_TEST_P(SuiteName, TestName)                             \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                       \
-    template <typename gtest_TypeParam_>                              \
-    class TestName : public SuiteName<gtest_TypeParam_> {             \
-     private:                                                         \
-      typedef SuiteName<gtest_TypeParam_> TestFixture;                \
-      typedef gtest_TypeParam_ TypeParam;                             \
-      void TestBody() override;                                       \
-    };                                                                \
-    static bool gtest_##TestName##_defined_ GTEST_ATTRIBUTE_UNUSED_ = \
-        GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).AddTestName(       \
-            __FILE__, __LINE__, GTEST_STRINGIFY_(SuiteName),          \
-            GTEST_STRINGIFY_(TestName));                              \
-  }                                                                   \
-  template <typename gtest_TypeParam_>                                \
-  void GTEST_SUITE_NAMESPACE_(                                        \
-      SuiteName)::TestName<gtest_TypeParam_>::TestBody()
-
-// Note: this won't work correctly if the trailing arguments are macros.
-#define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                         \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                             \
-    typedef ::testing::internal::Templates<__VA_ARGS__> gtest_AllTests_;    \
-  }                                                                         \
-  static const char* const GTEST_REGISTERED_TEST_NAMES_(                    \
-      SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                  \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).VerifyRegisteredTestNames( \
-          GTEST_STRINGIFY_(SuiteName), __FILE__, __LINE__, #__VA_ARGS__)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define REGISTER_TYPED_TEST_CASE_P                                           \
-  static_assert(::testing::internal::RegisterTypedTestCase_P_IsDeprecated(), \
-                "");                                                         \
-  REGISTER_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, SuiteName, Types, ...)       \
-  static_assert(sizeof(GTEST_STRINGIFY_(Prefix)) > 1,                       \
-                "test-suit-prefix must not be empty");                      \
-  static bool gtest_##Prefix##_##SuiteName GTEST_ATTRIBUTE_UNUSED_ =        \
-      ::testing::internal::TypeParameterizedTestSuite<                      \
-          SuiteName, GTEST_SUITE_NAMESPACE_(SuiteName)::gtest_AllTests_,    \
-          ::testing::internal::GenerateTypeList<Types>::type>::             \
-          Register(GTEST_STRINGIFY_(Prefix),                                \
-                   ::testing::internal::CodeLocation(__FILE__, __LINE__),   \
-                   &GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName),             \
-                   GTEST_STRINGIFY_(SuiteName),                             \
-                   GTEST_REGISTERED_TEST_NAMES_(SuiteName),                 \
-                   ::testing::internal::GenerateNames<                      \
-                       ::testing::internal::NameGeneratorSelector<          \
-                           __VA_ARGS__>::type,                              \
-                       ::testing::internal::GenerateTypeList<Types>::type>())
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TYPED_TEST_CASE_P                                      \
-  static_assert(                                                           \
-      ::testing::internal::InstantiateTypedTestCase_P_IsDeprecated(), ""); \
-  INSTANTIATE_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest.h b/third_party/googletest/googletest/include/gtest/gtest.h
deleted file mode 100644
index 7a5d057..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest.h
+++ /dev/null
@@ -1,2495 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for Google Test.  It should be
-// included by any test program that uses Google Test.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-//
-// Acknowledgment: Google Test borrowed the idea of automatic test
-// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
-// easyUnit framework.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_H_
-
-#include <cstddef>
-#include <limits>
-#include <memory>
-#include <ostream>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-#include "gtest/gtest-death-test.h"
-#include "gtest/gtest-matchers.h"
-#include "gtest/gtest-message.h"
-#include "gtest/gtest-param-test.h"
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest_prod.h"
-#include "gtest/gtest-test-part.h"
-#include "gtest/gtest-typed-test.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Silence C4100 (unreferenced formal parameter) and 4805
-// unsafe mix of type 'const int' and type 'const bool'
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4805)
-# pragma warning(disable:4100)
-#endif
-
-
-// Declares the flags.
-
-// This flag temporary enables the disabled tests.
-GTEST_DECLARE_bool_(also_run_disabled_tests);
-
-// This flag brings the debugger on an assertion failure.
-GTEST_DECLARE_bool_(break_on_failure);
-
-// This flag controls whether Google Test catches all test-thrown exceptions
-// and logs them as failures.
-GTEST_DECLARE_bool_(catch_exceptions);
-
-// This flag enables using colors in terminal output. Available values are
-// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
-// to let Google Test decide.
-GTEST_DECLARE_string_(color);
-
-// This flag controls whether the test runner should continue execution past
-// first failure.
-GTEST_DECLARE_bool_(fail_fast);
-
-// This flag sets up the filter to select by name using a glob pattern
-// the tests to run. If the filter is not given all tests are executed.
-GTEST_DECLARE_string_(filter);
-
-// This flag controls whether Google Test installs a signal handler that dumps
-// debugging information when fatal signals are raised.
-GTEST_DECLARE_bool_(install_failure_signal_handler);
-
-// This flag causes the Google Test to list tests. None of the tests listed
-// are actually run if the flag is provided.
-GTEST_DECLARE_bool_(list_tests);
-
-// This flag controls whether Google Test emits a detailed XML report to a file
-// in addition to its normal textual output.
-GTEST_DECLARE_string_(output);
-
-// This flags control whether Google Test prints only test failures.
-GTEST_DECLARE_bool_(brief);
-
-// This flags control whether Google Test prints the elapsed time for each
-// test.
-GTEST_DECLARE_bool_(print_time);
-
-// This flags control whether Google Test prints UTF8 characters as text.
-GTEST_DECLARE_bool_(print_utf8);
-
-// This flag specifies the random number seed.
-GTEST_DECLARE_int32_(random_seed);
-
-// This flag sets how many times the tests are repeated. The default value
-// is 1. If the value is -1 the tests are repeating forever.
-GTEST_DECLARE_int32_(repeat);
-
-// This flag controls whether Google Test includes Google Test internal
-// stack frames in failure stack traces.
-GTEST_DECLARE_bool_(show_internal_stack_frames);
-
-// When this flag is specified, tests' order is randomized on every iteration.
-GTEST_DECLARE_bool_(shuffle);
-
-// This flag specifies the maximum number of stack frames to be
-// printed in a failure message.
-GTEST_DECLARE_int32_(stack_trace_depth);
-
-// When this flag is specified, a failed assertion will throw an
-// exception if exceptions are enabled, or exit the program with a
-// non-zero code otherwise. For use with an external test framework.
-GTEST_DECLARE_bool_(throw_on_failure);
-
-// When this flag is set with a "host:port" string, on supported
-// platforms test results are streamed to the specified port on
-// the specified host machine.
-GTEST_DECLARE_string_(stream_result_to);
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DECLARE_string_(flagfile);
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// The upper limit for valid stack trace depths.
-const int kMaxStackTraceDepth = 100;
-
-namespace internal {
-
-class AssertHelper;
-class DefaultGlobalTestPartResultReporter;
-class ExecDeathTest;
-class NoExecDeathTest;
-class FinalSuccessChecker;
-class GTestFlagSaver;
-class StreamingListenerTest;
-class TestResultAccessor;
-class TestEventListenersAccessor;
-class TestEventRepeater;
-class UnitTestRecordPropertyTestHelper;
-class WindowsDeathTest;
-class FuchsiaDeathTest;
-class UnitTestImpl* GetUnitTestImpl();
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message);
-std::set<std::string>* GetIgnoredParameterizedTestSuites();
-
-}  // namespace internal
-
-// The friend relationship of some of these classes is cyclic.
-// If we don't forward declare them the compiler might confuse the classes
-// in friendship clauses with same named classes on the scope.
-class Test;
-class TestSuite;
-
-// Old API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TestCase = TestSuite;
-#endif
-class TestInfo;
-class UnitTest;
-
-// A class for indicating whether an assertion was successful.  When
-// the assertion wasn't successful, the AssertionResult object
-// remembers a non-empty message that describes how it failed.
-//
-// To create an instance of this class, use one of the factory functions
-// (AssertionSuccess() and AssertionFailure()).
-//
-// This class is useful for two purposes:
-//   1. Defining predicate functions to be used with Boolean test assertions
-//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
-//   2. Defining predicate-format functions to be
-//      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
-//
-// For example, if you define IsEven predicate:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
-// will print the message
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false (5 is odd)
-//   Expected: true
-//
-// instead of a more opaque
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false
-//   Expected: true
-//
-// in case IsEven is a simple Boolean predicate.
-//
-// If you expect your predicate to be reused and want to support informative
-// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
-// about half as often as positive ones in our tests), supply messages for
-// both success and failure cases:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess() << n << " is even";
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
-//
-//   Value of: IsEven(Fib(6))
-//     Actual: true (8 is even)
-//   Expected: false
-//
-// NB: Predicates that support negative Boolean assertions have reduced
-// performance in positive ones so be careful not to use them in tests
-// that have lots (tens of thousands) of positive Boolean assertions.
-//
-// To use this class with EXPECT_PRED_FORMAT assertions such as:
-//
-//   // Verifies that Foo() returns an even number.
-//   EXPECT_PRED_FORMAT1(IsEven, Foo());
-//
-// you need to define:
-//
-//   testing::AssertionResult IsEven(const char* expr, int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure()
-//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
-//   }
-//
-// If Foo() returns 5, you will see the following message:
-//
-//   Expected: Foo() is even
-//     Actual: it's 5
-//
-class GTEST_API_ AssertionResult {
- public:
-  // Copy constructor.
-  // Used in EXPECT_TRUE/FALSE(assertion_result).
-  AssertionResult(const AssertionResult& other);
-
-// C4800 is a level 3 warning in Visual Studio 2015 and earlier.
-// This warning is not emitted in Visual Studio 2017.
-// This warning is off by default starting in Visual Studio 2019 but can be
-// enabled with command-line options.
-#if defined(_MSC_VER) && (_MSC_VER < 1910 || _MSC_VER >= 1920)
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
-#endif
-
-  // Used in the EXPECT_TRUE/FALSE(bool_expression).
-  //
-  // T must be contextually convertible to bool.
-  //
-  // The second parameter prevents this overload from being considered if
-  // the argument is implicitly convertible to AssertionResult. In that case
-  // we want AssertionResult's copy constructor to be used.
-  template <typename T>
-  explicit AssertionResult(
-      const T& success,
-      typename std::enable_if<
-          !std::is_convertible<T, AssertionResult>::value>::type*
-      /*enabler*/
-      = nullptr)
-      : success_(success) {}
-
-#if defined(_MSC_VER) && (_MSC_VER < 1910 || _MSC_VER >= 1920)
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-  // Assignment operator.
-  AssertionResult& operator=(AssertionResult other) {
-    swap(other);
-    return *this;
-  }
-
-  // Returns true if and only if the assertion succeeded.
-  operator bool() const { return success_; }  // NOLINT
-
-  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-  AssertionResult operator!() const;
-
-  // Returns the text streamed into this AssertionResult. Test assertions
-  // use it when they fail (i.e., the predicate's outcome doesn't match the
-  // assertion's expectation). When nothing has been streamed into the
-  // object, returns an empty string.
-  const char* message() const {
-    return message_.get() != nullptr ? message_->c_str() : "";
-  }
-  // Deprecated; please use message() instead.
-  const char* failure_message() const { return message(); }
-
-  // Streams a custom failure message into this object.
-  template <typename T> AssertionResult& operator<<(const T& value) {
-    AppendMessage(Message() << value);
-    return *this;
-  }
-
-  // Allows streaming basic output manipulators such as endl or flush into
-  // this object.
-  AssertionResult& operator<<(
-      ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
-    AppendMessage(Message() << basic_manipulator);
-    return *this;
-  }
-
- private:
-  // Appends the contents of message to message_.
-  void AppendMessage(const Message& a_message) {
-    if (message_.get() == nullptr) message_.reset(new ::std::string);
-    message_->append(a_message.GetString().c_str());
-  }
-
-  // Swap the contents of this AssertionResult with other.
-  void swap(AssertionResult& other);
-
-  // Stores result of the assertion predicate.
-  bool success_;
-  // Stores the message describing the condition in case the expectation
-  // construct is not satisfied with the predicate's outcome.
-  // Referenced via a pointer to avoid taking too much stack frame space
-  // with test assertions.
-  std::unique_ptr< ::std::string> message_;
-};
-
-// Makes a successful assertion result.
-GTEST_API_ AssertionResult AssertionSuccess();
-
-// Makes a failed assertion result.
-GTEST_API_ AssertionResult AssertionFailure();
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << msg.
-GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
-
-}  // namespace testing
-
-// Includes the auto-generated header that implements a family of generic
-// predicate assertion macros. This include comes late because it relies on
-// APIs declared above.
-#include "gtest/gtest_pred_impl.h"
-
-namespace testing {
-
-// The abstract class that all tests inherit from.
-//
-// In Google Test, a unit test program contains one or many TestSuites, and
-// each TestSuite contains one or many Tests.
-//
-// When you define a test using the TEST macro, you don't need to
-// explicitly derive from Test - the TEST macro automatically does
-// this for you.
-//
-// The only time you derive from Test is when defining a test fixture
-// to be used in a TEST_F.  For example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { ... }
-//     void TearDown() override { ... }
-//     ...
-//   };
-//
-//   TEST_F(FooTest, Bar) { ... }
-//   TEST_F(FooTest, Baz) { ... }
-//
-// Test is not copyable.
-class GTEST_API_ Test {
- public:
-  friend class TestInfo;
-
-  // The d'tor is virtual as we intend to inherit from Test.
-  virtual ~Test();
-
-  // Sets up the stuff shared by all tests in this test suite.
-  //
-  // Google Test will call Foo::SetUpTestSuite() before running the first
-  // test in test suite Foo.  Hence a sub-class can define its own
-  // SetUpTestSuite() method to shadow the one defined in the super
-  // class.
-  static void SetUpTestSuite() {}
-
-  // Tears down the stuff shared by all tests in this test suite.
-  //
-  // Google Test will call Foo::TearDownTestSuite() after running the last
-  // test in test suite Foo.  Hence a sub-class can define its own
-  // TearDownTestSuite() method to shadow the one defined in the super
-  // class.
-  static void TearDownTestSuite() {}
-
-  // Legacy API is deprecated but still available. Use SetUpTestSuite and
-  // TearDownTestSuite instead.
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  static void TearDownTestCase() {}
-  static void SetUpTestCase() {}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns true if and only if the current test has a fatal failure.
-  static bool HasFatalFailure();
-
-  // Returns true if and only if the current test has a non-fatal failure.
-  static bool HasNonfatalFailure();
-
-  // Returns true if and only if the current test was skipped.
-  static bool IsSkipped();
-
-  // Returns true if and only if the current test has a (either fatal or
-  // non-fatal) failure.
-  static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
-
-  // Logs a property for the current test, test suite, or for the entire
-  // invocation of the test program when used outside of the context of a
-  // test suite.  Only the last value for a given key is remembered.  These
-  // are public static so they can be called from utility functions that are
-  // not members of the test fixture.  Calls to RecordProperty made during
-  // lifespan of the test (from the moment its constructor starts to the
-  // moment its destructor finishes) will be output in XML as attributes of
-  // the <testcase> element.  Properties recorded from fixture's
-  // SetUpTestSuite or TearDownTestSuite are logged as attributes of the
-  // corresponding <testsuite> element.  Calls to RecordProperty made in the
-  // global context (before or after invocation of RUN_ALL_TESTS and from
-  // SetUp/TearDown method of Environment objects registered with Google
-  // Test) will be output as attributes of the <testsuites> element.
-  static void RecordProperty(const std::string& key, const std::string& value);
-  static void RecordProperty(const std::string& key, int value);
-
- protected:
-  // Creates a Test object.
-  Test();
-
-  // Sets up the test fixture.
-  virtual void SetUp();
-
-  // Tears down the test fixture.
-  virtual void TearDown();
-
- private:
-  // Returns true if and only if the current test has the same fixture class
-  // as the first test in the current test suite.
-  static bool HasSameFixtureClass();
-
-  // Runs the test after the test fixture has been set up.
-  //
-  // A sub-class must implement this to define the test logic.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
-  // Instead, use the TEST or TEST_F macro.
-  virtual void TestBody() = 0;
-
-  // Sets up, executes, and tears down the test.
-  void Run();
-
-  // Deletes self.  We deliberately pick an unusual name for this
-  // internal method to avoid clashing with names used in user TESTs.
-  void DeleteSelf_() { delete this; }
-
-  const std::unique_ptr<GTEST_FLAG_SAVER_> gtest_flag_saver_;
-
-  // Often a user misspells SetUp() as Setup() and spends a long time
-  // wondering why it is never called by Google Test.  The declaration of
-  // the following method is solely for catching such an error at
-  // compile time:
-  //
-  //   - The return type is deliberately chosen to be not void, so it
-  //   will be a conflict if void Setup() is declared in the user's
-  //   test fixture.
-  //
-  //   - This method is private, so it will be another compiler error
-  //   if the method is called from the user's test fixture.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION.
-  //
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-
-  // We disallow copying Tests.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
-};
-
-typedef internal::TimeInMillis TimeInMillis;
-
-// A copyable object representing a user specified test property which can be
-// output as a key/value string pair.
-//
-// Don't inherit from TestProperty as its destructor is not virtual.
-class TestProperty {
- public:
-  // C'tor.  TestProperty does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestProperty object.
-  TestProperty(const std::string& a_key, const std::string& a_value) :
-    key_(a_key), value_(a_value) {
-  }
-
-  // Gets the user supplied key.
-  const char* key() const {
-    return key_.c_str();
-  }
-
-  // Gets the user supplied value.
-  const char* value() const {
-    return value_.c_str();
-  }
-
-  // Sets a new value, overriding the one supplied in the constructor.
-  void SetValue(const std::string& new_value) {
-    value_ = new_value;
-  }
-
- private:
-  // The key supplied by the user.
-  std::string key_;
-  // The value supplied by the user.
-  std::string value_;
-};
-
-// The result of a single Test.  This includes a list of
-// TestPartResults, a list of TestProperties, a count of how many
-// death tests there are in the Test, and how much time it took to run
-// the Test.
-//
-// TestResult is not copyable.
-class GTEST_API_ TestResult {
- public:
-  // Creates an empty TestResult.
-  TestResult();
-
-  // D'tor.  Do not inherit from TestResult.
-  ~TestResult();
-
-  // Gets the number of all test parts.  This is the sum of the number
-  // of successful test parts and the number of failed test parts.
-  int total_part_count() const;
-
-  // Returns the number of the test properties.
-  int test_property_count() const;
-
-  // Returns true if and only if the test passed (i.e. no test part failed).
-  bool Passed() const { return !Skipped() && !Failed(); }
-
-  // Returns true if and only if the test was skipped.
-  bool Skipped() const;
-
-  // Returns true if and only if the test failed.
-  bool Failed() const;
-
-  // Returns true if and only if the test fatally failed.
-  bool HasFatalFailure() const;
-
-  // Returns true if and only if the test has a non-fatal failure.
-  bool HasNonfatalFailure() const;
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test case start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test part result among all the results. i can range from 0
-  // to total_part_count() - 1. If i is not in that range, aborts the program.
-  const TestPartResult& GetTestPartResult(int i) const;
-
-  // Returns the i-th test property. i can range from 0 to
-  // test_property_count() - 1. If i is not in that range, aborts the
-  // program.
-  const TestProperty& GetTestProperty(int i) const;
-
- private:
-  friend class TestInfo;
-  friend class TestSuite;
-  friend class UnitTest;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::ExecDeathTest;
-  friend class internal::TestResultAccessor;
-  friend class internal::UnitTestImpl;
-  friend class internal::WindowsDeathTest;
-  friend class internal::FuchsiaDeathTest;
-
-  // Gets the vector of TestPartResults.
-  const std::vector<TestPartResult>& test_part_results() const {
-    return test_part_results_;
-  }
-
-  // Gets the vector of TestProperties.
-  const std::vector<TestProperty>& test_properties() const {
-    return test_properties_;
-  }
-
-  // Sets the start time.
-  void set_start_timestamp(TimeInMillis start) { start_timestamp_ = start; }
-
-  // Sets the elapsed time.
-  void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
-
-  // Adds a test property to the list. The property is validated and may add
-  // a non-fatal failure if invalid (e.g., if it conflicts with reserved
-  // key names). If a property is already recorded for the same key, the
-  // value will be updated, rather than storing multiple values for the same
-  // key.  xml_element specifies the element for which the property is being
-  // recorded and is used for validation.
-  void RecordProperty(const std::string& xml_element,
-                      const TestProperty& test_property);
-
-  // Adds a failure if the key is a reserved attribute of Google Test
-  // testsuite tags.  Returns true if the property is valid.
-  // FIXME: Validate attribute names are legal and human readable.
-  static bool ValidateTestProperty(const std::string& xml_element,
-                                   const TestProperty& test_property);
-
-  // Adds a test part result to the list.
-  void AddTestPartResult(const TestPartResult& test_part_result);
-
-  // Returns the death test count.
-  int death_test_count() const { return death_test_count_; }
-
-  // Increments the death test count, returning the new count.
-  int increment_death_test_count() { return ++death_test_count_; }
-
-  // Clears the test part results.
-  void ClearTestPartResults();
-
-  // Clears the object.
-  void Clear();
-
-  // Protects mutable state of the property vector and of owned
-  // properties, whose values may be updated.
-  internal::Mutex test_properties_mutex_;
-
-  // The vector of TestPartResults
-  std::vector<TestPartResult> test_part_results_;
-  // The vector of TestProperties
-  std::vector<TestProperty> test_properties_;
-  // Running count of death tests.
-  int death_test_count_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // The elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-  // We disallow copying TestResult.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
-};  // class TestResult
-
-// A TestInfo object stores the following information about a test:
-//
-//   Test suite name
-//   Test name
-//   Whether the test should be run
-//   A function pointer that creates the test object when invoked
-//   Test result
-//
-// The constructor of TestInfo registers itself with the UnitTest
-// singleton such that the RUN_ALL_TESTS() macro knows which tests to
-// run.
-class GTEST_API_ TestInfo {
- public:
-  // Destructs a TestInfo object.  This function is not virtual, so
-  // don't inherit from TestInfo.
-  ~TestInfo();
-
-  // Returns the test suite name.
-  const char* test_suite_name() const { return test_suite_name_.c_str(); }
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const char* test_case_name() const { return test_suite_name(); }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the test name.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a typed
-  // or a type-parameterized test.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the text representation of the value parameter, or NULL if this
-  // is not a value-parameterized test.
-  const char* value_param() const {
-    if (value_param_.get() != nullptr) return value_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the file name where this test is defined.
-  const char* file() const { return location_.file.c_str(); }
-
-  // Returns the line where this test is defined.
-  int line() const { return location_.line; }
-
-  // Return true if this test should not be run because it's in another shard.
-  bool is_in_another_shard() const { return is_in_another_shard_; }
-
-  // Returns true if this test should run, that is if the test is not
-  // disabled (or it is disabled but the also_run_disabled_tests flag has
-  // been specified) and its full name matches the user-specified filter.
-  //
-  // Google Test allows the user to filter the tests by their full names.
-  // The full name of a test Bar in test suite Foo is defined as
-  // "Foo.Bar".  Only the tests that match the filter will run.
-  //
-  // A filter is a colon-separated list of glob (not regex) patterns,
-  // optionally followed by a '-' and a colon-separated list of
-  // negative patterns (tests to exclude).  A test is run if it
-  // matches one of the positive patterns and does not match any of
-  // the negative patterns.
-  //
-  // For example, *A*:Foo.* is a filter that matches any string that
-  // contains the character 'A' or starts with "Foo.".
-  bool should_run() const { return should_run_; }
-
-  // Returns true if and only if this test will appear in the XML report.
-  bool is_reportable() const {
-    // The XML report includes tests matching the filter, excluding those
-    // run in other shards.
-    return matches_filter_ && !is_in_another_shard_;
-  }
-
-  // Returns the result of the test.
-  const TestResult* result() const { return &result_; }
-
- private:
-#if GTEST_HAS_DEATH_TEST
-  friend class internal::DefaultDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-  friend class Test;
-  friend class TestSuite;
-  friend class internal::UnitTestImpl;
-  friend class internal::StreamingListenerTest;
-  friend TestInfo* internal::MakeAndRegisterTestInfo(
-      const char* test_suite_name, const char* name, const char* type_param,
-      const char* value_param, internal::CodeLocation code_location,
-      internal::TypeId fixture_class_id, internal::SetUpTestSuiteFunc set_up_tc,
-      internal::TearDownTestSuiteFunc tear_down_tc,
-      internal::TestFactoryBase* factory);
-
-  // Constructs a TestInfo object. The newly constructed instance assumes
-  // ownership of the factory object.
-  TestInfo(const std::string& test_suite_name, const std::string& name,
-           const char* a_type_param,   // NULL if not a type-parameterized test
-           const char* a_value_param,  // NULL if not a value-parameterized test
-           internal::CodeLocation a_code_location,
-           internal::TypeId fixture_class_id,
-           internal::TestFactoryBase* factory);
-
-  // Increments the number of death tests encountered in this test so
-  // far.
-  int increment_death_test_count() {
-    return result_.increment_death_test_count();
-  }
-
-  // Creates the test object, runs it, records its result, and then
-  // deletes it.
-  void Run();
-
-  // Skip and records the test result for this object.
-  void Skip();
-
-  static void ClearTestResult(TestInfo* test_info) {
-    test_info->result_.Clear();
-  }
-
-  // These fields are immutable properties of the test.
-  const std::string test_suite_name_;    // test suite name
-  const std::string name_;               // Test name
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // Text representation of the value parameter, or NULL if this is not a
-  // value-parameterized test.
-  const std::unique_ptr<const ::std::string> value_param_;
-  internal::CodeLocation location_;
-  const internal::TypeId fixture_class_id_;  // ID of the test fixture class
-  bool should_run_;           // True if and only if this test should run
-  bool is_disabled_;          // True if and only if this test is disabled
-  bool matches_filter_;       // True if this test matches the
-                              // user-specified filter.
-  bool is_in_another_shard_;  // Will be run in another shard.
-  internal::TestFactoryBase* const factory_;  // The factory that creates
-                                              // the test object
-
-  // This field is mutable and needs to be reset before running the
-  // test for the second time.
-  TestResult result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
-};
-
-// A test suite, which consists of a vector of TestInfos.
-//
-// TestSuite is not copyable.
-class GTEST_API_ TestSuite {
- public:
-  // Creates a TestSuite with the given name.
-  //
-  // TestSuite does NOT have a default constructor.  Always use this
-  // constructor to create a TestSuite object.
-  //
-  // Arguments:
-  //
-  //   name:         name of the test suite
-  //   a_type_param: the name of the test's type parameter, or NULL if
-  //                 this is not a type-parameterized test.
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  TestSuite(const char* name, const char* a_type_param,
-            internal::SetUpTestSuiteFunc set_up_tc,
-            internal::TearDownTestSuiteFunc tear_down_tc);
-
-  // Destructor of TestSuite.
-  virtual ~TestSuite();
-
-  // Gets the name of the TestSuite.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a
-  // type-parameterized test suite.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns true if any test in this test suite should run.
-  bool should_run() const { return should_run_; }
-
-  // Gets the number of successful tests in this test suite.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests in this test suite.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests in this test suite.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests in this test suite.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Get the number of tests in this test suite that should run.
-  int test_to_run_count() const;
-
-  // Gets the number of all tests in this test suite.
-  int total_test_count() const;
-
-  // Returns true if and only if the test suite passed.
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the test suite failed.
-  bool Failed() const {
-    return failed_test_count() > 0 || ad_hoc_test_result().Failed();
-  }
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test suite start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  const TestInfo* GetTestInfo(int i) const;
-
-  // Returns the TestResult that holds test properties recorded during
-  // execution of SetUpTestSuite and TearDownTestSuite.
-  const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
-
- private:
-  friend class Test;
-  friend class internal::UnitTestImpl;
-
-  // Gets the (mutable) vector of TestInfos in this TestSuite.
-  std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
-
-  // Gets the (immutable) vector of TestInfos in this TestSuite.
-  const std::vector<TestInfo*>& test_info_list() const {
-    return test_info_list_;
-  }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  TestInfo* GetMutableTestInfo(int i);
-
-  // Sets the should_run member.
-  void set_should_run(bool should) { should_run_ = should; }
-
-  // Adds a TestInfo to this test suite.  Will delete the TestInfo upon
-  // destruction of the TestSuite object.
-  void AddTestInfo(TestInfo * test_info);
-
-  // Clears the results of all tests in this test suite.
-  void ClearResult();
-
-  // Clears the results of all tests in the given test suite.
-  static void ClearTestSuiteResult(TestSuite* test_suite) {
-    test_suite->ClearResult();
-  }
-
-  // Runs every test in this TestSuite.
-  void Run();
-
-  // Skips the execution of tests under this TestSuite
-  void Skip();
-
-  // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
-  // for catching exceptions thrown from SetUpTestSuite().
-  void RunSetUpTestSuite() {
-    if (set_up_tc_ != nullptr) {
-      (*set_up_tc_)();
-    }
-  }
-
-  // Runs TearDownTestSuite() for this TestSuite.  This wrapper is
-  // needed for catching exceptions thrown from TearDownTestSuite().
-  void RunTearDownTestSuite() {
-    if (tear_down_tc_ != nullptr) {
-      (*tear_down_tc_)();
-    }
-  }
-
-  // Returns true if and only if test passed.
-  static bool TestPassed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Passed();
-  }
-
-  // Returns true if and only if test skipped.
-  static bool TestSkipped(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Skipped();
-  }
-
-  // Returns true if and only if test failed.
-  static bool TestFailed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Failed();
-  }
-
-  // Returns true if and only if the test is disabled and will be reported in
-  // the XML report.
-  static bool TestReportableDisabled(const TestInfo* test_info) {
-    return test_info->is_reportable() && test_info->is_disabled_;
-  }
-
-  // Returns true if and only if test is disabled.
-  static bool TestDisabled(const TestInfo* test_info) {
-    return test_info->is_disabled_;
-  }
-
-  // Returns true if and only if this test will appear in the XML report.
-  static bool TestReportable(const TestInfo* test_info) {
-    return test_info->is_reportable();
-  }
-
-  // Returns true if the given test should run.
-  static bool ShouldRunTest(const TestInfo* test_info) {
-    return test_info->should_run();
-  }
-
-  // Shuffles the tests in this test suite.
-  void ShuffleTests(internal::Random* random);
-
-  // Restores the test order to before the first shuffle.
-  void UnshuffleTests();
-
-  // Name of the test suite.
-  std::string name_;
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // The vector of TestInfos in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestInfo*> test_info_list_;
-  // Provides a level of indirection for the test list to allow easy
-  // shuffling and restoring the test order.  The i-th element in this
-  // vector is the index of the i-th test in the shuffled test list.
-  std::vector<int> test_indices_;
-  // Pointer to the function that sets up the test suite.
-  internal::SetUpTestSuiteFunc set_up_tc_;
-  // Pointer to the function that tears down the test suite.
-  internal::TearDownTestSuiteFunc tear_down_tc_;
-  // True if and only if any test in this test suite should run.
-  bool should_run_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // Elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-  // Holds test properties recorded during execution of SetUpTestSuite and
-  // TearDownTestSuite.
-  TestResult ad_hoc_test_result_;
-
-  // We disallow copying TestSuites.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestSuite);
-};
-
-// An Environment object is capable of setting up and tearing down an
-// environment.  You should subclass this to define your own
-// environment(s).
-//
-// An Environment object does the set-up and tear-down in virtual
-// methods SetUp() and TearDown() instead of the constructor and the
-// destructor, as:
-//
-//   1. You cannot safely throw from a destructor.  This is a problem
-//      as in some cases Google Test is used where exceptions are enabled, and
-//      we may want to implement ASSERT_* using exceptions where they are
-//      available.
-//   2. You cannot use ASSERT_* directly in a constructor or
-//      destructor.
-class Environment {
- public:
-  // The d'tor is virtual as we need to subclass Environment.
-  virtual ~Environment() {}
-
-  // Override this to define how to set up the environment.
-  virtual void SetUp() {}
-
-  // Override this to define how to tear down the environment.
-  virtual void TearDown() {}
- private:
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-};
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Exception which can be thrown from TestEventListener::OnTestPartResult.
-class GTEST_API_ AssertionException
-    : public internal::GoogleTestFailureException {
- public:
-  explicit AssertionException(const TestPartResult& result)
-      : GoogleTestFailureException(result) {}
-};
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// The interface for tracing execution of tests. The methods are organized in
-// the order the corresponding events are fired.
-class TestEventListener {
- public:
-  virtual ~TestEventListener() {}
-
-  // Fired before any test activity starts.
-  virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
-
-  // Fired before each iteration of tests starts.  There may be more than
-  // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
-  // index, starting from 0.
-  virtual void OnTestIterationStart(const UnitTest& unit_test,
-                                    int iteration) = 0;
-
-  // Fired before environment set-up for each iteration of tests starts.
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment set-up for each iteration of tests ends.
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
-
-  // Fired before the test suite starts.
-  virtual void OnTestSuiteStart(const TestSuite& /*test_suite*/) {}
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before the test starts.
-  virtual void OnTestStart(const TestInfo& test_info) = 0;
-
-  // Fired after a failed assertion or a SUCCEED() invocation.
-  // If you want to throw an exception from this function to skip to the next
-  // TEST, it must be AssertionException defined above, or inherited from it.
-  virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
-
-  // Fired after the test ends.
-  virtual void OnTestEnd(const TestInfo& test_info) = 0;
-
-  // Fired after the test suite ends.
-  virtual void OnTestSuiteEnd(const TestSuite& /*test_suite*/) {}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before environment tear-down for each iteration of tests starts.
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment tear-down for each iteration of tests ends.
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
-
-  // Fired after each iteration of tests finishes.
-  virtual void OnTestIterationEnd(const UnitTest& unit_test,
-                                  int iteration) = 0;
-
-  // Fired after all test activities have ended.
-  virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
-};
-
-// The convenience class for users who need to override just one or two
-// methods and are not concerned that a possible change to a signature of
-// the methods they override will not be caught during the build.  For
-// comments about each method please see the definition of TestEventListener
-// above.
-class EmptyTestEventListener : public TestEventListener {
- public:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {}
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {}
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {}
-  void OnTestEnd(const TestInfo& /*test_info*/) override {}
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {}
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-};
-
-// TestEventListeners lets users add listeners to track events in Google Test.
-class GTEST_API_ TestEventListeners {
- public:
-  TestEventListeners();
-  ~TestEventListeners();
-
-  // Appends an event listener to the end of the list. Google Test assumes
-  // the ownership of the listener (i.e. it will delete the listener when
-  // the test program finishes).
-  void Append(TestEventListener* listener);
-
-  // Removes the given event listener from the list and returns it.  It then
-  // becomes the caller's responsibility to delete the listener. Returns
-  // NULL if the listener is not found in the list.
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Returns the standard listener responsible for the default console
-  // output.  Can be removed from the listeners list to shut down default
-  // console output.  Note that removing this object from the listener list
-  // with Release transfers its ownership to the caller and makes this
-  // function return NULL the next time.
-  TestEventListener* default_result_printer() const {
-    return default_result_printer_;
-  }
-
-  // Returns the standard listener responsible for the default XML output
-  // controlled by the --gtest_output=xml flag.  Can be removed from the
-  // listeners list by users who want to shut down the default XML output
-  // controlled by this flag and substitute it with custom one.  Note that
-  // removing this object from the listener list with Release transfers its
-  // ownership to the caller and makes this function return NULL the next
-  // time.
-  TestEventListener* default_xml_generator() const {
-    return default_xml_generator_;
-  }
-
- private:
-  friend class TestSuite;
-  friend class TestInfo;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::NoExecDeathTest;
-  friend class internal::TestEventListenersAccessor;
-  friend class internal::UnitTestImpl;
-
-  // Returns repeater that broadcasts the TestEventListener events to all
-  // subscribers.
-  TestEventListener* repeater();
-
-  // Sets the default_result_printer attribute to the provided listener.
-  // The listener is also added to the listener list and previous
-  // default_result_printer is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultResultPrinter(TestEventListener* listener);
-
-  // Sets the default_xml_generator attribute to the provided listener.  The
-  // listener is also added to the listener list and previous
-  // default_xml_generator is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultXmlGenerator(TestEventListener* listener);
-
-  // Controls whether events will be forwarded by the repeater to the
-  // listeners in the list.
-  bool EventForwardingEnabled() const;
-  void SuppressEventForwarding();
-
-  // The actual list of listeners.
-  internal::TestEventRepeater* repeater_;
-  // Listener responsible for the standard result output.
-  TestEventListener* default_result_printer_;
-  // Listener responsible for the creation of the XML output file.
-  TestEventListener* default_xml_generator_;
-
-  // We disallow copying TestEventListeners.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
-};
-
-// A UnitTest consists of a vector of TestSuites.
-//
-// This is a singleton class.  The only instance of UnitTest is
-// created when UnitTest::GetInstance() is first called.  This
-// instance is never deleted.
-//
-// UnitTest is not copyable.
-//
-// This class is thread-safe as long as the methods are called
-// according to their specification.
-class GTEST_API_ UnitTest {
- public:
-  // Gets the singleton UnitTest object.  The first time this method
-  // is called, a UnitTest object is constructed and returned.
-  // Consecutive calls will return the same object.
-  static UnitTest* GetInstance();
-
-  // Runs all tests in this UnitTest object and prints the result.
-  // Returns 0 if successful, or 1 otherwise.
-  //
-  // This method can only be called from the main thread.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  int Run() GTEST_MUST_USE_RESULT_;
-
-  // Returns the working directory when the first TEST() or TEST_F()
-  // was executed.  The UnitTest object owns the string.
-  const char* original_working_dir() const;
-
-  // Returns the TestSuite object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestSuite* current_test_suite() const GTEST_LOCK_EXCLUDED_(mutex_);
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* current_test_case() const GTEST_LOCK_EXCLUDED_(mutex_);
-#endif
-
-  // Returns the TestInfo object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestInfo* current_test_info() const
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Returns the random seed used at the start of the current test run.
-  int random_seed() const;
-
-  // Returns the ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  int successful_test_case_count() const;
-  int failed_test_case_count() const;
-  int total_test_case_count() const;
-  int test_case_to_run_count() const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const;
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const;
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const;
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const;
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const;
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the TestResult containing information on test failures and
-  // properties logged outside of individual test suites.
-  const TestResult& ad_hoc_test_result() const;
-
-  // Returns the list of event listeners that can be used to track events
-  // inside Google Test.
-  TestEventListeners& listeners();
-
- private:
-  // Registers and returns a global test environment.  When a test
-  // program is run, all global test environments will be set-up in
-  // the order they were registered.  After all tests in the program
-  // have finished, all global test environments will be torn-down in
-  // the *reverse* order they were registered.
-  //
-  // The UnitTest object takes ownership of the given environment.
-  //
-  // This method can only be called from the main thread.
-  Environment* AddEnvironment(Environment* env);
-
-  // Adds a TestPartResult to the current TestResult object.  All
-  // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
-  // eventually call this to report their results.  The user code
-  // should use the assertion macros instead of calling this directly.
-  void AddTestPartResult(TestPartResult::Type result_type,
-                         const char* file_name,
-                         int line_number,
-                         const std::string& message,
-                         const std::string& os_stack_trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Adds a TestProperty to the current TestResult object when invoked from
-  // inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-  // from SetUpTestSuite or TearDownTestSuite, or to the global property set
-  // when invoked elsewhere.  If the result already contains a property with
-  // the same key, the value will be updated.
-  void RecordProperty(const std::string& key, const std::string& value);
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableTestSuite(int i);
-
-  // Accessors for the implementation object.
-  internal::UnitTestImpl* impl() { return impl_; }
-  const internal::UnitTestImpl* impl() const { return impl_; }
-
-  // These classes and functions are friends as they need to access private
-  // members of UnitTest.
-  friend class ScopedTrace;
-  friend class Test;
-  friend class internal::AssertHelper;
-  friend class internal::StreamingListenerTest;
-  friend class internal::UnitTestRecordPropertyTestHelper;
-  friend Environment* AddGlobalTestEnvironment(Environment* env);
-  friend std::set<std::string>* internal::GetIgnoredParameterizedTestSuites();
-  friend internal::UnitTestImpl* internal::GetUnitTestImpl();
-  friend void internal::ReportFailureInUnknownLocation(
-      TestPartResult::Type result_type,
-      const std::string& message);
-
-  // Creates an empty UnitTest.
-  UnitTest();
-
-  // D'tor
-  virtual ~UnitTest();
-
-  // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-  // Google Test trace stack.
-  void PushGTestTrace(const internal::TraceInfo& trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Pops a trace from the per-thread Google Test trace stack.
-  void PopGTestTrace()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Protects mutable state in *impl_.  This is mutable as some const
-  // methods need to lock it too.
-  mutable internal::Mutex mutex_;
-
-  // Opaque implementation object.  This field is never changed once
-  // the object is constructed.  We don't mark it as const here, as
-  // doing so will cause a warning in the constructor of UnitTest.
-  // Mutable state in *impl_ is protected by mutex_.
-  internal::UnitTestImpl* impl_;
-
-  // We disallow copying UnitTest.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
-};
-
-// A convenient wrapper for adding an environment for the test
-// program.
-//
-// You should call this before RUN_ALL_TESTS() is called, probably in
-// main().  If you use gtest_main, you need to call this before main()
-// starts for it to take effect.  For example, you can define a global
-// variable like this:
-//
-//   testing::Environment* const foo_env =
-//       testing::AddGlobalTestEnvironment(new FooEnvironment);
-//
-// However, we strongly recommend you to write your own main() and
-// call AddGlobalTestEnvironment() there, as relying on initialization
-// of global variables makes the code harder to read and may cause
-// problems when you register multiple environments from different
-// translation units and the environments have dependencies among them
-// (remember that the compiler doesn't guarantee the order in which
-// global variables from different translation units are initialized).
-inline Environment* AddGlobalTestEnvironment(Environment* env) {
-  return UnitTest::GetInstance()->AddEnvironment(env);
-}
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-GTEST_API_ void InitGoogleTest(int* argc, char** argv);
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleTest();
-
-namespace internal {
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_* in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQFailure(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const T1& lhs, const T2& rhs) {
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   FormatForComparisonFailureMessage(lhs, rhs),
-                   FormatForComparisonFailureMessage(rhs, lhs),
-                   false);
-}
-
-// This block of code defines operator==/!=
-// to block lexical scope lookup.
-// It prevents using invalid operator==/!= defined at namespace scope.
-struct faketype {};
-inline bool operator==(faketype, faketype) { return true; }
-inline bool operator!=(faketype, faketype) { return false; }
-
-// The helper function for {ASSERT|EXPECT}_EQ.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQ(const char* lhs_expression,
-                            const char* rhs_expression,
-                            const T1& lhs,
-                            const T2& rhs) {
-  if (lhs == rhs) {
-    return AssertionSuccess();
-  }
-
-  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
-}
-
-class EqHelper {
- public:
-  // This templatized version is for the general case.
-  template <
-      typename T1, typename T2,
-      // Disable this overload for cases where one argument is a pointer
-      // and the other is the null pointer constant.
-      typename std::enable_if<!std::is_integral<T1>::value ||
-                              !std::is_pointer<T2>::value>::type* = nullptr>
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression, const T1& lhs,
-                                 const T2& rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  // With this overloaded version, we allow anonymous enums to be used
-  // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
-  // enums can be implicitly cast to BiggestInt.
-  //
-  // Even though its body looks the same as the above version, we
-  // cannot merge the two, as it will make anonymous enums unhappy.
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression,
-                                 BiggestInt lhs,
-                                 BiggestInt rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  template <typename T>
-  static AssertionResult Compare(
-      const char* lhs_expression, const char* rhs_expression,
-      // Handle cases where '0' is used as a null pointer literal.
-      std::nullptr_t /* lhs */, T* rhs) {
-    // We already know that 'lhs' is a null pointer.
-    return CmpHelperEQ(lhs_expression, rhs_expression, static_cast<T*>(nullptr),
-                       rhs);
-  }
-};
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_OP in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
-                                   const T1& val1, const T2& val2,
-                                   const char* op) {
-  return AssertionFailure()
-         << "Expected: (" << expr1 << ") " << op << " (" << expr2
-         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
-         << " vs " << FormatForComparisonFailureMessage(val2, val1);
-}
-
-// A macro for implementing the helper functions needed to implement
-// ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
-// of similar code.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
-template <typename T1, typename T2>\
-AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
-                                   const T1& val1, const T2& val2) {\
-  if (val1 op val2) {\
-    return AssertionSuccess();\
-  } else {\
-    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
-  }\
-}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// Implements the helper function for {ASSERT|EXPECT}_NE
-GTEST_IMPL_CMP_HELPER_(NE, !=)
-// Implements the helper function for {ASSERT|EXPECT}_LE
-GTEST_IMPL_CMP_HELPER_(LE, <=)
-// Implements the helper function for {ASSERT|EXPECT}_LT
-GTEST_IMPL_CMP_HELPER_(LT, <)
-// Implements the helper function for {ASSERT|EXPECT}_GE
-GTEST_IMPL_CMP_HELPER_(GE, >=)
-// Implements the helper function for {ASSERT|EXPECT}_GT
-GTEST_IMPL_CMP_HELPER_(GT, >)
-
-#undef GTEST_IMPL_CMP_HELPER_
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-
-// Helper function for *_STREQ on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-// Helper function for *_STRNE on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-}  // namespace internal
-
-// IsSubstring() and IsNotSubstring() are intended to be used as the
-// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
-// themselves.  They check whether needle is a substring of haystack
-// (NULL is considered a substring of itself only), and return an
-// appropriate error message when they fail.
-//
-// The {needle,haystack}_expr arguments are the stringified
-// expressions that generated the two real arguments.
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-// Helper template function for comparing floating-points.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename RawType>
-AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
-                                         const char* rhs_expression,
-                                         RawType lhs_value,
-                                         RawType rhs_value) {
-  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
-
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  ::std::stringstream lhs_ss;
-  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << lhs_value;
-
-  ::std::stringstream rhs_ss;
-  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << rhs_value;
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   StringStreamToString(&lhs_ss),
-                   StringStreamToString(&rhs_ss),
-                   false);
-}
-
-// Helper function for implementing ASSERT_NEAR.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
-                                                const char* expr2,
-                                                const char* abs_error_expr,
-                                                double val1,
-                                                double val2,
-                                                double abs_error);
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// A class that enables one to stream messages to assertion macros
-class GTEST_API_ AssertHelper {
- public:
-  // Constructor.
-  AssertHelper(TestPartResult::Type type,
-               const char* file,
-               int line,
-               const char* message);
-  ~AssertHelper();
-
-  // Message assignment is a semantic trick to enable assertion
-  // streaming; see the GTEST_MESSAGE_ macro below.
-  void operator=(const Message& message) const;
-
- private:
-  // We put our data in a struct so that the size of the AssertHelper class can
-  // be as small as possible.  This is important because gcc is incapable of
-  // re-using stack space even for temporary variables, so every EXPECT_EQ
-  // reserves stack space for another AssertHelper.
-  struct AssertHelperData {
-    AssertHelperData(TestPartResult::Type t,
-                     const char* srcfile,
-                     int line_num,
-                     const char* msg)
-        : type(t), file(srcfile), line(line_num), message(msg) { }
-
-    TestPartResult::Type const type;
-    const char* const file;
-    int const line;
-    std::string const message;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
-  };
-
-  AssertHelperData* const data_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
-};
-
-}  // namespace internal
-
-// The pure interface class that all value-parameterized tests inherit from.
-// A value-parameterized class must inherit from both ::testing::Test and
-// ::testing::WithParamInterface. In most cases that just means inheriting
-// from ::testing::TestWithParam, but more complicated test hierarchies
-// may need to inherit from Test and WithParamInterface at different levels.
-//
-// This interface has support for accessing the test parameter value via
-// the GetParam() method.
-//
-// Use it with one of the parameter generator defining functions, like Range(),
-// Values(), ValuesIn(), Bool(), and Combine().
-//
-// class FooTest : public ::testing::TestWithParam<int> {
-//  protected:
-//   FooTest() {
-//     // Can use GetParam() here.
-//   }
-//   ~FooTest() override {
-//     // Can use GetParam() here.
-//   }
-//   void SetUp() override {
-//     // Can use GetParam() here.
-//   }
-//   void TearDown override {
-//     // Can use GetParam() here.
-//   }
-// };
-// TEST_P(FooTest, DoesBar) {
-//   // Can use GetParam() method here.
-//   Foo foo;
-//   ASSERT_TRUE(foo.DoesBar(GetParam()));
-// }
-// INSTANTIATE_TEST_SUITE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
-
-template <typename T>
-class WithParamInterface {
- public:
-  typedef T ParamType;
-  virtual ~WithParamInterface() {}
-
-  // The current parameter value. Is also available in the test fixture's
-  // constructor.
-  static const ParamType& GetParam() {
-    GTEST_CHECK_(parameter_ != nullptr)
-        << "GetParam() can only be called inside a value-parameterized test "
-        << "-- did you intend to write TEST_P instead of TEST_F?";
-    return *parameter_;
-  }
-
- private:
-  // Sets parameter value. The caller is responsible for making sure the value
-  // remains alive and unchanged throughout the current test.
-  static void SetParam(const ParamType* parameter) {
-    parameter_ = parameter;
-  }
-
-  // Static value used for accessing parameter during a test lifetime.
-  static const ParamType* parameter_;
-
-  // TestClass must be a subclass of WithParamInterface<T> and Test.
-  template <class TestClass> friend class internal::ParameterizedTestFactory;
-};
-
-template <typename T>
-const T* WithParamInterface<T>::parameter_ = nullptr;
-
-// Most value-parameterized classes can ignore the existence of
-// WithParamInterface, and can just inherit from ::testing::TestWithParam.
-
-template <typename T>
-class TestWithParam : public Test, public WithParamInterface<T> {
-};
-
-// Macros for indicating success/failure in test code.
-
-// Skips test in runtime.
-// Skipping test aborts current function.
-// Skipped tests are neither successful nor failed.
-#define GTEST_SKIP() GTEST_SKIP_("")
-
-// ADD_FAILURE unconditionally adds a failure to the current test.
-// SUCCEED generates a success - it doesn't automatically make the
-// current test successful, as a test is only successful when it has
-// no failure.
-//
-// EXPECT_* verifies that a certain condition is satisfied.  If not,
-// it behaves like ADD_FAILURE.  In particular:
-//
-//   EXPECT_TRUE  verifies that a Boolean condition is true.
-//   EXPECT_FALSE verifies that a Boolean condition is false.
-//
-// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
-// that they will also abort the current function on failure.  People
-// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
-// writing data-driven tests often find themselves using ADD_FAILURE
-// and EXPECT_* more.
-
-// Generates a nonfatal failure with a generic message.
-#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
-
-// Generates a nonfatal failure at the given source file location with
-// a generic message.
-#define ADD_FAILURE_AT(file, line) \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kNonFatalFailure)
-
-// Generates a fatal failure with a generic message.
-#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
-
-// Like GTEST_FAIL(), but at the given source file location.
-#define GTEST_FAIL_AT(file, line)         \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kFatalFailure)
-
-// Define this macro to 1 to omit the definition of FAIL(), which is a
-// generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_FAIL
-# define FAIL() GTEST_FAIL()
-#endif
-
-// Generates a success with a generic message.
-#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
-
-// Define this macro to 1 to omit the definition of SUCCEED(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_SUCCEED
-# define SUCCEED() GTEST_SUCCEED()
-#endif
-
-// Macros for testing exceptions.
-//
-//    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
-//         Tests that the statement throws the expected exception.
-//    * {ASSERT|EXPECT}_NO_THROW(statement):
-//         Tests that the statement doesn't throw any exception.
-//    * {ASSERT|EXPECT}_ANY_THROW(statement):
-//         Tests that the statement throws an exception.
-
-#define EXPECT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
-#define ASSERT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
-#define ASSERT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
-
-// Boolean assertions. Condition can be either a Boolean expression or an
-// AssertionResult. For more information on how to use AssertionResult with
-// these macros see comments on that class.
-#define GTEST_EXPECT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_NONFATAL_FAILURE_)
-#define GTEST_EXPECT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_NONFATAL_FAILURE_)
-#define GTEST_ASSERT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_FATAL_FAILURE_)
-#define GTEST_ASSERT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_FATAL_FAILURE_)
-
-// Define these macros to 1 to omit the definition of the corresponding
-// EXPECT or ASSERT, which clashes with some users' own code.
-
-#if !GTEST_DONT_DEFINE_EXPECT_TRUE
-#define EXPECT_TRUE(condition) GTEST_EXPECT_TRUE(condition)
-#endif
-
-#if !GTEST_DONT_DEFINE_EXPECT_FALSE
-#define EXPECT_FALSE(condition) GTEST_EXPECT_FALSE(condition)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_TRUE
-#define ASSERT_TRUE(condition) GTEST_ASSERT_TRUE(condition)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_FALSE
-#define ASSERT_FALSE(condition) GTEST_ASSERT_FALSE(condition)
-#endif
-
-// Macros for testing equalities and inequalities.
-//
-//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
-//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
-//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
-//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
-//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
-//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
-//
-// When they are not, Google Test prints both the tested expressions and
-// their actual values.  The values must be compatible built-in types,
-// or you will get a compiler error.  By "compatible" we mean that the
-// values can be compared by the respective operator.
-//
-// Note:
-//
-//   1. It is possible to make a user-defined type work with
-//   {ASSERT|EXPECT}_??(), but that requires overloading the
-//   comparison operators and is thus discouraged by the Google C++
-//   Usage Guide.  Therefore, you are advised to use the
-//   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
-//   equal.
-//
-//   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
-//   pointers (in particular, C strings).  Therefore, if you use it
-//   with two C strings, you are testing how their locations in memory
-//   are related, not how their content is related.  To compare two C
-//   strings by content, use {ASSERT|EXPECT}_STR*().
-//
-//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
-//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
-//   what the actual value is when it fails, and similarly for the
-//   other comparisons.
-//
-//   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
-//   evaluate their arguments, which is undefined.
-//
-//   5. These macros evaluate their arguments exactly once.
-//
-// Examples:
-//
-//   EXPECT_NE(Foo(), 5);
-//   EXPECT_EQ(a_pointer, NULL);
-//   ASSERT_LT(i, array_size);
-//   ASSERT_GT(records.size(), 0) << "There is no record left.";
-
-#define EXPECT_EQ(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define EXPECT_NE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define EXPECT_LE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define EXPECT_LT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define EXPECT_GE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define EXPECT_GT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-#define GTEST_ASSERT_EQ(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define GTEST_ASSERT_NE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define GTEST_ASSERT_LE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define GTEST_ASSERT_LT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define GTEST_ASSERT_GE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define GTEST_ASSERT_GT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-// Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
-// ASSERT_XY(), which clashes with some users' own code.
-
-#if !GTEST_DONT_DEFINE_ASSERT_EQ
-# define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_NE
-# define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LE
-# define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LT
-# define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GE
-# define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GT
-# define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
-#endif
-
-// C-string Comparisons.  All tests treat NULL and any non-NULL string
-// as different.  Two NULLs are equal.
-//
-//    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
-//    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
-//    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
-//    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
-//
-// For wide or narrow string objects, you can use the
-// {ASSERT|EXPECT}_??() macros.
-//
-// Don't depend on the order in which the arguments are evaluated,
-// which is undefined.
-//
-// These macros evaluate their arguments exactly once.
-
-#define EXPECT_STREQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define EXPECT_STRNE(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define EXPECT_STRCASEEQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define EXPECT_STRCASENE(s1, s2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-#define ASSERT_STREQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define ASSERT_STRNE(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define ASSERT_STRCASEEQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define ASSERT_STRCASENE(s1, s2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-// Macros for comparing floating-point numbers.
-//
-//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
-//         Tests that two float values are almost equal.
-//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
-//         Tests that two double values are almost equal.
-//    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
-//         Tests that v1 and v2 are within the given distance to each other.
-//
-// Google Test uses ULP-based comparison to automatically pick a default
-// error bound that is appropriate for the operands.  See the
-// FloatingPoint template class in gtest-internal.h if you are
-// interested in the implementation details.
-
-#define EXPECT_FLOAT_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define EXPECT_DOUBLE_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define ASSERT_FLOAT_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define ASSERT_DOUBLE_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define EXPECT_NEAR(val1, val2, abs_error)\
-  EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-#define ASSERT_NEAR(val1, val2, abs_error)\
-  ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-// These predicate format functions work on floating-point values, and
-// can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
-//
-//   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
-                                   float val1, float val2);
-GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                                    double val1, double val2);
-
-
-#if GTEST_OS_WINDOWS
-
-// Macros that test for HRESULT failure and success, these are only useful
-// on Windows, and rely on Windows SDK macros and APIs to compile.
-//
-//    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
-//
-// When expr unexpectedly fails or succeeds, Google Test prints the
-// expected result and the actual result with both a human-readable
-// string representation of the error, if available, as well as the
-// hex result code.
-# define EXPECT_HRESULT_SUCCEEDED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define ASSERT_HRESULT_SUCCEEDED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define EXPECT_HRESULT_FAILED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-# define ASSERT_HRESULT_FAILED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-#endif  // GTEST_OS_WINDOWS
-
-// Macros that execute statement and check that it doesn't generate new fatal
-// failures in the current thread.
-//
-//   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
-//
-// Examples:
-//
-//   EXPECT_NO_FATAL_FAILURE(Process());
-//   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
-//
-#define ASSERT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
-#define EXPECT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
-
-// Causes a trace (including the given source file path and line number,
-// and the given message) to be included in every test failure message generated
-// by code in the scope of the lifetime of an instance of this class. The effect
-// is undone with the destruction of the instance.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// Example:
-//   testing::ScopedTrace trace("file.cc", 123, "message");
-//
-class GTEST_API_ ScopedTrace {
- public:
-  // The c'tor pushes the given source file location and message onto
-  // a trace stack maintained by Google Test.
-
-  // Template version. Uses Message() to convert the values into strings.
-  // Slow, but flexible.
-  template <typename T>
-  ScopedTrace(const char* file, int line, const T& message) {
-    PushTrace(file, line, (Message() << message).GetString());
-  }
-
-  // Optimize for some known types.
-  ScopedTrace(const char* file, int line, const char* message) {
-    PushTrace(file, line, message ? message : "(null)");
-  }
-
-  ScopedTrace(const char* file, int line, const std::string& message) {
-    PushTrace(file, line, message);
-  }
-
-  // The d'tor pops the info pushed by the c'tor.
-  //
-  // Note that the d'tor is not virtual in order to be efficient.
-  // Don't inherit from ScopedTrace!
-  ~ScopedTrace();
-
- private:
-  void PushTrace(const char* file, int line, std::string message);
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
-} GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
-                            // c'tor and d'tor.  Therefore it doesn't
-                            // need to be used otherwise.
-
-// Causes a trace (including the source file path, the current line
-// number, and the given message) to be included in every test failure
-// message generated by code in the current scope.  The effect is
-// undone when the control leaves the current scope.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// In the implementation, we include the current line number as part
-// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
-// to appear in the same block - as long as they are on different
-// lines.
-//
-// Assuming that each thread maintains its own stack of traces.
-// Therefore, a SCOPED_TRACE() would (correctly) only affect the
-// assertions in its own thread.
-#define SCOPED_TRACE(message) \
-  ::testing::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
-    __FILE__, __LINE__, (message))
-
-// Compile-time assertion for type equality.
-// StaticAssertTypeEq<type1, type2>() compiles if and only if type1 and type2
-// are the same type.  The value it returns is not interesting.
-//
-// Instead of making StaticAssertTypeEq a class template, we make it a
-// function template that invokes a helper class template.  This
-// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
-// defining objects of that type.
-//
-// CAVEAT:
-//
-// When used inside a method of a class template,
-// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
-// instantiated.  For example, given:
-//
-//   template <typename T> class Foo {
-//    public:
-//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
-//   };
-//
-// the code:
-//
-//   void Test1() { Foo<bool> foo; }
-//
-// will NOT generate a compiler error, as Foo<bool>::Bar() is never
-// actually instantiated.  Instead, you need:
-//
-//   void Test2() { Foo<bool> foo; foo.Bar(); }
-//
-// to cause a compiler error.
-template <typename T1, typename T2>
-constexpr bool StaticAssertTypeEq() noexcept {
-  static_assert(std::is_same<T1, T2>::value, "T1 and T2 are not the same type");
-  return true;
-}
-
-// Defines a test.
-//
-// The first parameter is the name of the test suite, and the second
-// parameter is the name of the test within the test suite.
-//
-// The convention is to end the test suite name with "Test".  For
-// example, a test suite for the Foo class can be named FooTest.
-//
-// Test code should appear between braces after an invocation of
-// this macro.  Example:
-//
-//   TEST(FooTest, InitializesCorrectly) {
-//     Foo foo;
-//     EXPECT_TRUE(foo.StatusIsOK());
-//   }
-
-// Note that we call GetTestTypeId() instead of GetTypeId<
-// ::testing::Test>() here to get the type ID of testing::Test.  This
-// is to work around a suspected linker bug when using Google Test as
-// a framework on Mac OS X.  The bug causes GetTypeId<
-// ::testing::Test>() to return different values depending on whether
-// the call is from the Google Test framework itself or from user test
-// code.  GetTestTypeId() is guaranteed to always return the same
-// value, as it always calls GetTypeId<>() from the Google Test
-// framework.
-#define GTEST_TEST(test_suite_name, test_name)             \
-  GTEST_TEST_(test_suite_name, test_name, ::testing::Test, \
-              ::testing::internal::GetTestTypeId())
-
-// Define this macro to 1 to omit the definition of TEST(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_TEST
-#define TEST(test_suite_name, test_name) GTEST_TEST(test_suite_name, test_name)
-#endif
-
-// Defines a test that uses a test fixture.
-//
-// The first parameter is the name of the test fixture class, which
-// also doubles as the test suite name.  The second parameter is the
-// name of the test within the test suite.
-//
-// A test fixture class must be declared earlier.  The user should put
-// the test code between braces after using this macro.  Example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { b_.AddElement(3); }
-//
-//     Foo a_;
-//     Foo b_;
-//   };
-//
-//   TEST_F(FooTest, InitializesCorrectly) {
-//     EXPECT_TRUE(a_.StatusIsOK());
-//   }
-//
-//   TEST_F(FooTest, ReturnsElementCountCorrectly) {
-//     EXPECT_EQ(a_.size(), 0);
-//     EXPECT_EQ(b_.size(), 1);
-//   }
-//
-// GOOGLETEST_CM0011 DO NOT DELETE
-#if !GTEST_DONT_DEFINE_TEST
-#define TEST_F(test_fixture, test_name)\
-  GTEST_TEST_(test_fixture, test_name, test_fixture, \
-              ::testing::internal::GetTypeId<test_fixture>())
-#endif  // !GTEST_DONT_DEFINE_TEST
-
-// Returns a path to temporary directory.
-// Tries to determine an appropriate directory for the platform.
-GTEST_API_ std::string TempDir();
-
-#ifdef _MSC_VER
-#  pragma warning(pop)
-#endif
-
-// Dynamically registers a test with the framework.
-//
-// This is an advanced API only to be used when the `TEST` macros are
-// insufficient. The macros should be preferred when possible, as they avoid
-// most of the complexity of calling this function.
-//
-// The `factory` argument is a factory callable (move-constructible) object or
-// function pointer that creates a new instance of the Test object. It
-// handles ownership to the caller. The signature of the callable is
-// `Fixture*()`, where `Fixture` is the test fixture class for the test. All
-// tests registered with the same `test_suite_name` must return the same
-// fixture type. This is checked at runtime.
-//
-// The framework will infer the fixture class from the factory and will call
-// the `SetUpTestSuite` and `TearDownTestSuite` for it.
-//
-// Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-// undefined.
-//
-// Use case example:
-//
-// class MyFixture : public ::testing::Test {
-//  public:
-//   // All of these optional, just like in regular macro usage.
-//   static void SetUpTestSuite() { ... }
-//   static void TearDownTestSuite() { ... }
-//   void SetUp() override { ... }
-//   void TearDown() override { ... }
-// };
-//
-// class MyTest : public MyFixture {
-//  public:
-//   explicit MyTest(int data) : data_(data) {}
-//   void TestBody() override { ... }
-//
-//  private:
-//   int data_;
-// };
-//
-// void RegisterMyTests(const std::vector<int>& values) {
-//   for (int v : values) {
-//     ::testing::RegisterTest(
-//         "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-//         std::to_string(v).c_str(),
-//         __FILE__, __LINE__,
-//         // Important to use the fixture type as the return type here.
-//         [=]() -> MyFixture* { return new MyTest(v); });
-//   }
-// }
-// ...
-// int main(int argc, char** argv) {
-//   std::vector<int> values_to_test = LoadValuesFromConfig();
-//   RegisterMyTests(values_to_test);
-//   ...
-//   return RUN_ALL_TESTS();
-// }
-//
-template <int&... ExplicitParameterBarrier, typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory) {
-  using TestT = typename std::remove_pointer<decltype(factory())>::type;
-
-  class FactoryImpl : public internal::TestFactoryBase {
-   public:
-    explicit FactoryImpl(Factory f) : factory_(std::move(f)) {}
-    Test* CreateTest() override { return factory_(); }
-
-   private:
-    Factory factory_;
-  };
-
-  return internal::MakeAndRegisterTestInfo(
-      test_suite_name, test_name, type_param, value_param,
-      internal::CodeLocation(file, line), internal::GetTypeId<TestT>(),
-      internal::SuiteApiResolver<TestT>::GetSetUpCaseOrSuite(file, line),
-      internal::SuiteApiResolver<TestT>::GetTearDownCaseOrSuite(file, line),
-      new FactoryImpl{std::move(factory)});
-}
-
-}  // namespace testing
-
-// Use this function in main() to run all tests.  It returns 0 if all
-// tests are successful, or 1 otherwise.
-//
-// RUN_ALL_TESTS() should be invoked after the command line has been
-// parsed by InitGoogleTest().
-//
-// This function was formerly a macro; thus, it is in the global
-// namespace and has an all-caps name.
-int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
-
-inline int RUN_ALL_TESTS() {
-  return ::testing::UnitTest::GetInstance()->Run();
-}
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest_pred_impl.h b/third_party/googletest/googletest/include/gtest/gtest_pred_impl.h
deleted file mode 100644
index 5029a9b..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest_pred_impl.h
+++ /dev/null
@@ -1,359 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-#include "gtest/gtest.h"
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most 5.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \
-    ; \
-  else \
-    on_failure(gtest_ar.failure_message())
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1>
-AssertionResult AssertPred1Helper(const char* pred_text,
-                                  const char* e1,
-                                  Pred pred,
-                                  const T1& v1) {
-  if (pred(v1)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT1.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT1_(pred_format, v1, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, v1), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-#define GTEST_PRED1_(pred, v1, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred1Helper(#pred, \
-                                             #v1, \
-                                             pred, \
-                                             v1), on_failure)
-
-// Unary predicate assertion macros.
-#define EXPECT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2>
-AssertionResult AssertPred2Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2) {
-  if (pred(v1, v2)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT2.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT2_(pred_format, v1, v2, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, v1, v2), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-#define GTEST_PRED2_(pred, v1, v2, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred2Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             pred, \
-                                             v1, \
-                                             v2), on_failure)
-
-// Binary predicate assertion macros.
-#define EXPECT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3>
-AssertionResult AssertPred3Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3) {
-  if (pred(v1, v2, v3)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT3.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, v1, v2, v3), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-#define GTEST_PRED3_(pred, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred3Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3), on_failure)
-
-// Ternary predicate assertion macros.
-#define EXPECT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4>
-AssertionResult AssertPred4Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4) {
-  if (pred(v1, v2, v3, v4)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT4.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, v1, v2, v3, v4), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-#define GTEST_PRED4_(pred, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred4Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4), on_failure)
-
-// 4-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4,
-          typename T5>
-AssertionResult AssertPred5Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  const char* e5,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4,
-                                  const T5& v5) {
-  if (pred(v1, v2, v3, v4, v5)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ", " << e5 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4) << "\n"
-         << e5 << " evaluates to " << ::testing::PrintToString(v5);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT5.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, #v5, v1, v2, v3, v4, v5), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-#define GTEST_PRED5_(pred, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred5Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             #v5, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4, \
-                                             v5), on_failure)
-
-// 5-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-
-
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
diff --git a/third_party/googletest/googletest/include/gtest/gtest_prod.h b/third_party/googletest/googletest/include/gtest/gtest_prod.h
deleted file mode 100644
index 38b9d85..0000000
--- a/third_party/googletest/googletest/include/gtest/gtest_prod.h
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework definitions useful in production code.
-// GOOGLETEST_CM0003 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
-
-// When you need to test the private or protected members of a class,
-// use the FRIEND_TEST macro to declare your tests as friends of the
-// class.  For example:
-//
-// class MyClass {
-//  private:
-//   void PrivateMethod();
-//   FRIEND_TEST(MyClassTest, PrivateMethodWorks);
-// };
-//
-// class MyClassTest : public testing::Test {
-//   // ...
-// };
-//
-// TEST_F(MyClassTest, PrivateMethodWorks) {
-//   // Can call MyClass::PrivateMethod() here.
-// }
-//
-// Note: The test class must be in the same namespace as the class being tested.
-// For example, putting MyClassTest in an anonymous namespace will not work.
-
-#define FRIEND_TEST(test_case_name, test_name)\
-friend class test_case_name##_##test_name##_Test
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/custom/README.md b/third_party/googletest/googletest/include/gtest/internal/custom/README.md
deleted file mode 100644
index ff391fb..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/custom/README.md
+++ /dev/null
@@ -1,56 +0,0 @@
-# Customization Points
-
-The custom directory is an injection point for custom user configurations.
-
-## Header `gtest.h`
-
-### The following macros can be defined:
-
-*   `GTEST_OS_STACK_TRACE_GETTER_` - The name of an implementation of
-    `OsStackTraceGetterInterface`.
-*   `GTEST_CUSTOM_TEMPDIR_FUNCTION_` - An override for `testing::TempDir()`. See
-    `testing::TempDir` for semantics and signature.
-
-## Header `gtest-port.h`
-
-The following macros can be defined:
-
-### Flag related macros:
-
-*   `GTEST_FLAG(flag_name)`
-*   `GTEST_USE_OWN_FLAGFILE_FLAG_` - Define to 0 when the system provides its
-    own flagfile flag parsing.
-*   `GTEST_DECLARE_bool_(name)`
-*   `GTEST_DECLARE_int32_(name)`
-*   `GTEST_DECLARE_string_(name)`
-*   `GTEST_DEFINE_bool_(name, default_val, doc)`
-*   `GTEST_DEFINE_int32_(name, default_val, doc)`
-*   `GTEST_DEFINE_string_(name, default_val, doc)`
-
-### Logging:
-
-*   `GTEST_LOG_(severity)`
-*   `GTEST_CHECK_(condition)`
-*   Functions `LogToStderr()` and `FlushInfoLog()` have to be provided too.
-
-### Threading:
-
-*   `GTEST_HAS_NOTIFICATION_` - Enabled if Notification is already provided.
-*   `GTEST_HAS_MUTEX_AND_THREAD_LOCAL_` - Enabled if `Mutex` and `ThreadLocal`
-    are already provided. Must also provide `GTEST_DECLARE_STATIC_MUTEX_(mutex)`
-    and `GTEST_DEFINE_STATIC_MUTEX_(mutex)`
-*   `GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)`
-*   `GTEST_LOCK_EXCLUDED_(locks)`
-
-### Underlying library support features
-
-*   `GTEST_HAS_CXXABI_H_`
-
-### Exporting API symbols:
-
-*   `GTEST_API_` - Specifier for exported symbols.
-
-## Header `gtest-printers.h`
-
-*   See documentation at `gtest/gtest-printers.h` for details on how to define a
-    custom printer.
diff --git a/third_party/googletest/googletest/include/gtest/internal/custom/gtest-port.h b/third_party/googletest/googletest/include/gtest/internal/custom/gtest-port.h
deleted file mode 100644
index db02881..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/custom/gtest-port.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/custom/gtest-printers.h b/third_party/googletest/googletest/include/gtest/internal/custom/gtest-printers.h
deleted file mode 100644
index b9495d8..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/custom/gtest-printers.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file provides an injection point for custom printers in a local
-// installation of gTest.
-// It will be included from gtest-printers.h and the overrides in this file
-// will be visible to everyone.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/custom/gtest.h b/third_party/googletest/googletest/include/gtest/internal/custom/gtest.h
deleted file mode 100644
index afaaf17..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/custom/gtest.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-death-test-internal.h b/third_party/googletest/googletest/include/gtest/internal/gtest-death-test-internal.h
deleted file mode 100644
index 490296d..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-death-test-internal.h
+++ /dev/null
@@ -1,304 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines internal utilities needed for implementing
-// death tests.  They are subject to change without notice.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-
-#include "gtest/gtest-matchers.h"
-#include "gtest/internal/gtest-internal.h"
-
-#include <stdio.h>
-#include <memory>
-
-namespace testing {
-namespace internal {
-
-GTEST_DECLARE_string_(internal_run_death_test);
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kDeathTestStyleFlag[] = "death_test_style";
-const char kDeathTestUseFork[] = "death_test_use_fork";
-const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
-
-#if GTEST_HAS_DEATH_TEST
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// DeathTest is a class that hides much of the complexity of the
-// GTEST_DEATH_TEST_ macro.  It is abstract; its static Create method
-// returns a concrete class that depends on the prevailing death test
-// style, as defined by the --gtest_death_test_style and/or
-// --gtest_internal_run_death_test flags.
-
-// In describing the results of death tests, these terms are used with
-// the corresponding definitions:
-//
-// exit status:  The integer exit information in the format specified
-//               by wait(2)
-// exit code:    The integer code passed to exit(3), _exit(2), or
-//               returned from main()
-class GTEST_API_ DeathTest {
- public:
-  // Create returns false if there was an error determining the
-  // appropriate action to take for the current death test; for example,
-  // if the gtest_death_test_style flag is set to an invalid value.
-  // The LastMessage method will return a more detailed message in that
-  // case.  Otherwise, the DeathTest pointer pointed to by the "test"
-  // argument is set.  If the death test should be skipped, the pointer
-  // is set to NULL; otherwise, it is set to the address of a new concrete
-  // DeathTest object that controls the execution of the current test.
-  static bool Create(const char* statement, Matcher<const std::string&> matcher,
-                     const char* file, int line, DeathTest** test);
-  DeathTest();
-  virtual ~DeathTest() { }
-
-  // A helper class that aborts a death test when it's deleted.
-  class ReturnSentinel {
-   public:
-    explicit ReturnSentinel(DeathTest* test) : test_(test) { }
-    ~ReturnSentinel() { test_->Abort(TEST_ENCOUNTERED_RETURN_STATEMENT); }
-   private:
-    DeathTest* const test_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ReturnSentinel);
-  } GTEST_ATTRIBUTE_UNUSED_;
-
-  // An enumeration of possible roles that may be taken when a death
-  // test is encountered.  EXECUTE means that the death test logic should
-  // be executed immediately.  OVERSEE means that the program should prepare
-  // the appropriate environment for a child process to execute the death
-  // test, then wait for it to complete.
-  enum TestRole { OVERSEE_TEST, EXECUTE_TEST };
-
-  // An enumeration of the three reasons that a test might be aborted.
-  enum AbortReason {
-    TEST_ENCOUNTERED_RETURN_STATEMENT,
-    TEST_THREW_EXCEPTION,
-    TEST_DID_NOT_DIE
-  };
-
-  // Assumes one of the above roles.
-  virtual TestRole AssumeRole() = 0;
-
-  // Waits for the death test to finish and returns its status.
-  virtual int Wait() = 0;
-
-  // Returns true if the death test passed; that is, the test process
-  // exited during the test, its exit status matches a user-supplied
-  // predicate, and its stderr output matches a user-supplied regular
-  // expression.
-  // The user-supplied predicate may be a macro expression rather
-  // than a function pointer or functor, or else Wait and Passed could
-  // be combined.
-  virtual bool Passed(bool exit_status_ok) = 0;
-
-  // Signals that the death test did not die as expected.
-  virtual void Abort(AbortReason reason) = 0;
-
-  // Returns a human-readable outcome message regarding the outcome of
-  // the last death test.
-  static const char* LastMessage();
-
-  static void set_last_death_test_message(const std::string& message);
-
- private:
-  // A string containing a description of the outcome of the last death test.
-  static std::string last_death_test_message_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Factory interface for death tests.  May be mocked out for testing.
-class DeathTestFactory {
- public:
-  virtual ~DeathTestFactory() { }
-  virtual bool Create(const char* statement,
-                      Matcher<const std::string&> matcher, const char* file,
-                      int line, DeathTest** test) = 0;
-};
-
-// A concrete DeathTestFactory implementation for normal use.
-class DefaultDeathTestFactory : public DeathTestFactory {
- public:
-  bool Create(const char* statement, Matcher<const std::string&> matcher,
-              const char* file, int line, DeathTest** test) override;
-};
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
-
-// A string passed to EXPECT_DEATH (etc.) is caught by one of these overloads
-// and interpreted as a regex (rather than an Eq matcher) for legacy
-// compatibility.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    ::testing::internal::RE regex) {
-  return ContainsRegex(regex.pattern());
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(const char* regex) {
-  return ContainsRegex(regex);
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    const ::std::string& regex) {
-  return ContainsRegex(regex);
-}
-
-// If a Matcher<const ::std::string&> is passed to EXPECT_DEATH (etc.), it's
-// used directly.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    Matcher<const ::std::string&> matcher) {
-  return matcher;
-}
-
-// Traps C++ exceptions escaping statement and reports them as test
-// failures. Note that trapping SEH exceptions is not implemented here.
-# if GTEST_HAS_EXCEPTIONS
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  try { \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-  } catch (const ::std::exception& gtest_exception) { \
-    fprintf(\
-        stderr, \
-        "\n%s: Caught std::exception-derived exception escaping the " \
-        "death test statement. Exception message: %s\n", \
-        ::testing::internal::FormatFileLocation(__FILE__, __LINE__).c_str(), \
-        gtest_exception.what()); \
-    fflush(stderr); \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  } catch (...) { \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  }
-
-# else
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-
-# endif
-
-// This macro is for implementing ASSERT_DEATH*, EXPECT_DEATH*,
-// ASSERT_EXIT*, and EXPECT_EXIT*.
-#define GTEST_DEATH_TEST_(statement, predicate, regex_or_matcher, fail)        \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
-  if (::testing::internal::AlwaysTrue()) {                                     \
-    ::testing::internal::DeathTest* gtest_dt;                                  \
-    if (!::testing::internal::DeathTest::Create(                               \
-            #statement,                                                        \
-            ::testing::internal::MakeDeathTestMatcher(regex_or_matcher),       \
-            __FILE__, __LINE__, &gtest_dt)) {                                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                        \
-    }                                                                          \
-    if (gtest_dt != nullptr) {                                                 \
-      std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(gtest_dt); \
-      switch (gtest_dt->AssumeRole()) {                                        \
-        case ::testing::internal::DeathTest::OVERSEE_TEST:                     \
-          if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) {                \
-            goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                  \
-          }                                                                    \
-          break;                                                               \
-        case ::testing::internal::DeathTest::EXECUTE_TEST: {                   \
-          ::testing::internal::DeathTest::ReturnSentinel gtest_sentinel(       \
-              gtest_dt);                                                       \
-          GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, gtest_dt);            \
-          gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE);   \
-          break;                                                               \
-        }                                                                      \
-        default:                                                               \
-          break;                                                               \
-      }                                                                        \
-    }                                                                          \
-  } else                                                                       \
-    GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__)                                \
-        : fail(::testing::internal::DeathTest::LastMessage())
-// The symbol "fail" here expands to something into which a message
-// can be streamed.
-
-// This macro is for implementing ASSERT/EXPECT_DEBUG_DEATH when compiled in
-// NDEBUG mode. In this case we need the statements to be executed and the macro
-// must accept a streamed message even though the message is never printed.
-// The regex object is not evaluated, but it is used to prevent "unused"
-// warnings and to avoid an expression that doesn't compile in debug mode.
-#define GTEST_EXECUTE_STATEMENT_(statement, regex_or_matcher)    \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                  \
-  if (::testing::internal::AlwaysTrue()) {                       \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);   \
-  } else if (!::testing::internal::AlwaysTrue()) {               \
-    ::testing::internal::MakeDeathTestMatcher(regex_or_matcher); \
-  } else                                                         \
-    ::testing::Message()
-
-// A class representing the parsed contents of the
-// --gtest_internal_run_death_test flag, as it existed when
-// RUN_ALL_TESTS was called.
-class InternalRunDeathTestFlag {
- public:
-  InternalRunDeathTestFlag(const std::string& a_file,
-                           int a_line,
-                           int an_index,
-                           int a_write_fd)
-      : file_(a_file), line_(a_line), index_(an_index),
-        write_fd_(a_write_fd) {}
-
-  ~InternalRunDeathTestFlag() {
-    if (write_fd_ >= 0)
-      posix::Close(write_fd_);
-  }
-
-  const std::string& file() const { return file_; }
-  int line() const { return line_; }
-  int index() const { return index_; }
-  int write_fd() const { return write_fd_; }
-
- private:
-  std::string file_;
-  int line_;
-  int index_;
-  int write_fd_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
-};
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-filepath.h b/third_party/googletest/googletest/include/gtest/internal/gtest-filepath.h
deleted file mode 100644
index 0c033ab..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-filepath.h
+++ /dev/null
@@ -1,211 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This header file declares classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included in gtest/internal/gtest-internal.h.
-// Do not include this header file separately!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-
-#include "gtest/internal/gtest-string.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-namespace internal {
-
-// FilePath - a class for file and directory pathname manipulation which
-// handles platform-specific conventions (like the pathname separator).
-// Used for helper functions for naming files in a directory for xml output.
-// Except for Set methods, all methods are const or static, which provides an
-// "immutable value object" -- useful for peace of mind.
-// A FilePath with a value ending in a path separator ("like/this/") represents
-// a directory, otherwise it is assumed to represent a file. In either case,
-// it may or may not represent an actual file or directory in the file system.
-// Names are NOT checked for syntax correctness -- no checking for illegal
-// characters, malformed paths, etc.
-
-class GTEST_API_ FilePath {
- public:
-  FilePath() : pathname_("") { }
-  FilePath(const FilePath& rhs) : pathname_(rhs.pathname_) { }
-
-  explicit FilePath(const std::string& pathname) : pathname_(pathname) {
-    Normalize();
-  }
-
-  FilePath& operator=(const FilePath& rhs) {
-    Set(rhs);
-    return *this;
-  }
-
-  void Set(const FilePath& rhs) {
-    pathname_ = rhs.pathname_;
-  }
-
-  const std::string& string() const { return pathname_; }
-  const char* c_str() const { return pathname_.c_str(); }
-
-  // Returns the current working directory, or "" if unsuccessful.
-  static FilePath GetCurrentDir();
-
-  // Given directory = "dir", base_name = "test", number = 0,
-  // extension = "xml", returns "dir/test.xml". If number is greater
-  // than zero (e.g., 12), returns "dir/test_12.xml".
-  // On Windows platform, uses \ as the separator rather than /.
-  static FilePath MakeFileName(const FilePath& directory,
-                               const FilePath& base_name,
-                               int number,
-                               const char* extension);
-
-  // Given directory = "dir", relative_path = "test.xml",
-  // returns "dir/test.xml".
-  // On Windows, uses \ as the separator rather than /.
-  static FilePath ConcatPaths(const FilePath& directory,
-                              const FilePath& relative_path);
-
-  // Returns a pathname for a file that does not currently exist. The pathname
-  // will be directory/base_name.extension or
-  // directory/base_name_<number>.extension if directory/base_name.extension
-  // already exists. The number will be incremented until a pathname is found
-  // that does not already exist.
-  // Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-  // There could be a race condition if two or more processes are calling this
-  // function at the same time -- they could both pick the same filename.
-  static FilePath GenerateUniqueFileName(const FilePath& directory,
-                                         const FilePath& base_name,
-                                         const char* extension);
-
-  // Returns true if and only if the path is "".
-  bool IsEmpty() const { return pathname_.empty(); }
-
-  // If input name has a trailing separator character, removes it and returns
-  // the name, otherwise return the name string unmodified.
-  // On Windows platform, uses \ as the separator, other platforms use /.
-  FilePath RemoveTrailingPathSeparator() const;
-
-  // Returns a copy of the FilePath with the directory part removed.
-  // Example: FilePath("path/to/file").RemoveDirectoryName() returns
-  // FilePath("file"). If there is no directory part ("just_a_file"), it returns
-  // the FilePath unmodified. If there is no file part ("just_a_dir/") it
-  // returns an empty FilePath ("").
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveDirectoryName() const;
-
-  // RemoveFileName returns the directory path with the filename removed.
-  // Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-  // If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-  // FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-  // not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveFileName() const;
-
-  // Returns a copy of the FilePath with the case-insensitive extension removed.
-  // Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-  // FilePath("dir/file"). If a case-insensitive extension is not
-  // found, returns a copy of the original FilePath.
-  FilePath RemoveExtension(const char* extension) const;
-
-  // Creates directories so that path exists. Returns true if successful or if
-  // the directories already exist; returns false if unable to create
-  // directories for any reason. Will also return false if the FilePath does
-  // not represent a directory (that is, it doesn't end with a path separator).
-  bool CreateDirectoriesRecursively() const;
-
-  // Create the directory so that path exists. Returns true if successful or
-  // if the directory already exists; returns false if unable to create the
-  // directory for any reason, including if the parent directory does not
-  // exist. Not named "CreateDirectory" because that's a macro on Windows.
-  bool CreateFolder() const;
-
-  // Returns true if FilePath describes something in the file-system,
-  // either a file, directory, or whatever, and that something exists.
-  bool FileOrDirectoryExists() const;
-
-  // Returns true if pathname describes a directory in the file-system
-  // that exists.
-  bool DirectoryExists() const;
-
-  // Returns true if FilePath ends with a path separator, which indicates that
-  // it is intended to represent a directory. Returns false otherwise.
-  // This does NOT check that a directory (or file) actually exists.
-  bool IsDirectory() const;
-
-  // Returns true if pathname describes a root directory. (Windows has one
-  // root directory per disk drive.)
-  bool IsRootDirectory() const;
-
-  // Returns true if pathname describes an absolute path.
-  bool IsAbsolutePath() const;
-
- private:
-  // Replaces multiple consecutive separators with a single separator.
-  // For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-  // redundancies that might be in a pathname involving "." or "..".
-  //
-  // A pathname with multiple consecutive separators may occur either through
-  // user error or as a result of some scripts or APIs that generate a pathname
-  // with a trailing separator. On other platforms the same API or script
-  // may NOT generate a pathname with a trailing "/". Then elsewhere that
-  // pathname may have another "/" and pathname components added to it,
-  // without checking for the separator already being there.
-  // The script language and operating system may allow paths like "foo//bar"
-  // but some of the functions in FilePath will not handle that correctly. In
-  // particular, RemoveTrailingPathSeparator() only removes one separator, and
-  // it is called in CreateDirectoriesRecursively() assuming that it will change
-  // a pathname from directory syntax (trailing separator) to filename syntax.
-  //
-  // On Windows this method also replaces the alternate path separator '/' with
-  // the primary path separator '\\', so that for example "bar\\/\\foo" becomes
-  // "bar\\foo".
-
-  void Normalize();
-
-  // Returns a pointer to the last occurrence of a valid path separator in
-  // the FilePath. On Windows, for example, both '/' and '\' are valid path
-  // separators. Returns NULL if no path separator was found.
-  const char* FindLastPathSeparator() const;
-
-  std::string pathname_;
-};  // class FilePath
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-internal.h b/third_party/googletest/googletest/include/gtest/internal/gtest-internal.h
deleted file mode 100644
index f8cbdbd..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-internal.h
+++ /dev/null
@@ -1,1560 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares functions and macros used internally by
-// Google Test.  They are subject to change without notice.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_LINUX
-# include <stdlib.h>
-# include <sys/types.h>
-# include <sys/wait.h>
-# include <unistd.h>
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#include <ctype.h>
-#include <float.h>
-#include <string.h>
-#include <cstdint>
-#include <iomanip>
-#include <limits>
-#include <map>
-#include <set>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-filepath.h"
-#include "gtest/internal/gtest-string.h"
-#include "gtest/internal/gtest-type-util.h"
-
-// Due to C++ preprocessor weirdness, we need double indirection to
-// concatenate two tokens when one of them is __LINE__.  Writing
-//
-//   foo ## __LINE__
-//
-// will result in the token foo__LINE__, instead of foo followed by
-// the current line number.  For more details, see
-// http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.6
-#define GTEST_CONCAT_TOKEN_(foo, bar) GTEST_CONCAT_TOKEN_IMPL_(foo, bar)
-#define GTEST_CONCAT_TOKEN_IMPL_(foo, bar) foo ## bar
-
-// Stringifies its argument.
-// Work around a bug in visual studio which doesn't accept code like this:
-//
-//   #define GTEST_STRINGIFY_(name) #name
-//   #define MACRO(a, b, c) ... GTEST_STRINGIFY_(a) ...
-//   MACRO(, x, y)
-//
-// Complaining about the argument to GTEST_STRINGIFY_ being empty.
-// This is allowed by the spec.
-#define GTEST_STRINGIFY_HELPER_(name, ...) #name
-#define GTEST_STRINGIFY_(...) GTEST_STRINGIFY_HELPER_(__VA_ARGS__, )
-
-namespace proto2 {
-class MessageLite;
-}
-
-namespace testing {
-
-// Forward declarations.
-
-class AssertionResult;                 // Result of an assertion.
-class Message;                         // Represents a failure message.
-class Test;                            // Represents a test.
-class TestInfo;                        // Information about a test.
-class TestPartResult;                  // Result of a test part.
-class UnitTest;                        // A collection of test suites.
-
-template <typename T>
-::std::string PrintToString(const T& value);
-
-namespace internal {
-
-struct TraceInfo;                      // Information about a trace point.
-class TestInfoImpl;                    // Opaque implementation of TestInfo
-class UnitTestImpl;                    // Opaque implementation of UnitTest
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-GTEST_API_ extern const char kStackTraceMarker[];
-
-// An IgnoredValue object can be implicitly constructed from ANY value.
-class IgnoredValue {
-  struct Sink {};
- public:
-  // This constructor template allows any value to be implicitly
-  // converted to IgnoredValue.  The object has no data member and
-  // doesn't try to remember anything about the argument.  We
-  // deliberately omit the 'explicit' keyword in order to allow the
-  // conversion to be implicit.
-  // Disable the conversion if T already has a magical conversion operator.
-  // Otherwise we get ambiguity.
-  template <typename T,
-            typename std::enable_if<!std::is_convertible<T, Sink>::value,
-                                    int>::type = 0>
-  IgnoredValue(const T& /* ignored */) {}  // NOLINT(runtime/explicit)
-};
-
-// Appends the user-supplied message to the Google-Test-generated message.
-GTEST_API_ std::string AppendUserMessage(
-    const std::string& gtest_msg, const Message& user_msg);
-
-#if GTEST_HAS_EXCEPTIONS
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4275 \
-/* an exported class was derived from a class that was not exported */)
-
-// This exception is thrown by (and only by) a failed Google Test
-// assertion when GTEST_FLAG(throw_on_failure) is true (if exceptions
-// are enabled).  We derive it from std::runtime_error, which is for
-// errors presumably detectable only at run time.  Since
-// std::runtime_error inherits from std::exception, many testing
-// frameworks know how to extract and print the message inside it.
-class GTEST_API_ GoogleTestFailureException : public ::std::runtime_error {
- public:
-  explicit GoogleTestFailureException(const TestPartResult& failure);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4275
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-namespace edit_distance {
-// Returns the optimal edits to go from 'left' to 'right'.
-// All edits cost the same, with replace having lower priority than
-// add/remove.
-// Simple implementation of the Wagner-Fischer algorithm.
-// See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
-enum EditType { kMatch, kAdd, kRemove, kReplace };
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<size_t>& left, const std::vector<size_t>& right);
-
-// Same as above, but the input is represented as strings.
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right);
-
-// Create a diff of the input strings in Unified diff format.
-GTEST_API_ std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                                         const std::vector<std::string>& right,
-                                         size_t context = 2);
-
-}  // namespace edit_distance
-
-// Calculate the diff between 'left' and 'right' and return it in unified diff
-// format.
-// If not null, stores in 'total_line_count' the total number of lines found
-// in left + right.
-GTEST_API_ std::string DiffStrings(const std::string& left,
-                                   const std::string& right,
-                                   size_t* total_line_count);
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   expected_expression: "foo"
-//   actual_expression:   "bar"
-//   expected_value:      "5"
-//   actual_value:        "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
-// be inserted into the message.
-GTEST_API_ AssertionResult EqFailure(const char* expected_expression,
-                                     const char* actual_expression,
-                                     const std::string& expected_value,
-                                     const std::string& actual_value,
-                                     bool ignoring_case);
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-GTEST_API_ std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value);
-
-// This template class represents an IEEE floating-point number
-// (either single-precision or double-precision, depending on the
-// template parameters).
-//
-// The purpose of this class is to do more sophisticated number
-// comparison.  (Due to round-off error, etc, it's very unlikely that
-// two floating-points will be equal exactly.  Hence a naive
-// comparison by the == operation often doesn't work.)
-//
-// Format of IEEE floating-point:
-//
-//   The most-significant bit being the leftmost, an IEEE
-//   floating-point looks like
-//
-//     sign_bit exponent_bits fraction_bits
-//
-//   Here, sign_bit is a single bit that designates the sign of the
-//   number.
-//
-//   For float, there are 8 exponent bits and 23 fraction bits.
-//
-//   For double, there are 11 exponent bits and 52 fraction bits.
-//
-//   More details can be found at
-//   http://en.wikipedia.org/wiki/IEEE_floating-point_standard.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-template <typename RawType>
-class FloatingPoint {
- public:
-  // Defines the unsigned integer type that has the same size as the
-  // floating point number.
-  typedef typename TypeWithSize<sizeof(RawType)>::UInt Bits;
-
-  // Constants.
-
-  // # of bits in a number.
-  static const size_t kBitCount = 8*sizeof(RawType);
-
-  // # of fraction bits in a number.
-  static const size_t kFractionBitCount =
-    std::numeric_limits<RawType>::digits - 1;
-
-  // # of exponent bits in a number.
-  static const size_t kExponentBitCount = kBitCount - 1 - kFractionBitCount;
-
-  // The mask for the sign bit.
-  static const Bits kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1);
-
-  // The mask for the fraction bits.
-  static const Bits kFractionBitMask =
-    ~static_cast<Bits>(0) >> (kExponentBitCount + 1);
-
-  // The mask for the exponent bits.
-  static const Bits kExponentBitMask = ~(kSignBitMask | kFractionBitMask);
-
-  // How many ULP's (Units in the Last Place) we want to tolerate when
-  // comparing two numbers.  The larger the value, the more error we
-  // allow.  A 0 value means that two numbers must be exactly the same
-  // to be considered equal.
-  //
-  // The maximum error of a single floating-point operation is 0.5
-  // units in the last place.  On Intel CPU's, all floating-point
-  // calculations are done with 80-bit precision, while double has 64
-  // bits.  Therefore, 4 should be enough for ordinary use.
-  //
-  // See the following article for more details on ULP:
-  // http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
-  static const uint32_t kMaxUlps = 4;
-
-  // Constructs a FloatingPoint from a raw floating-point number.
-  //
-  // On an Intel CPU, passing a non-normalized NAN (Not a Number)
-  // around may change its bits, although the new value is guaranteed
-  // to be also a NAN.  Therefore, don't expect this constructor to
-  // preserve the bits in x when x is a NAN.
-  explicit FloatingPoint(const RawType& x) { u_.value_ = x; }
-
-  // Static methods
-
-  // Reinterprets a bit pattern as a floating-point number.
-  //
-  // This function is needed to test the AlmostEquals() method.
-  static RawType ReinterpretBits(const Bits bits) {
-    FloatingPoint fp(0);
-    fp.u_.bits_ = bits;
-    return fp.u_.value_;
-  }
-
-  // Returns the floating-point number that represent positive infinity.
-  static RawType Infinity() {
-    return ReinterpretBits(kExponentBitMask);
-  }
-
-  // Returns the maximum representable finite floating-point number.
-  static RawType Max();
-
-  // Non-static methods
-
-  // Returns the bits that represents this number.
-  const Bits &bits() const { return u_.bits_; }
-
-  // Returns the exponent bits of this number.
-  Bits exponent_bits() const { return kExponentBitMask & u_.bits_; }
-
-  // Returns the fraction bits of this number.
-  Bits fraction_bits() const { return kFractionBitMask & u_.bits_; }
-
-  // Returns the sign bit of this number.
-  Bits sign_bit() const { return kSignBitMask & u_.bits_; }
-
-  // Returns true if and only if this is NAN (not a number).
-  bool is_nan() const {
-    // It's a NAN if the exponent bits are all ones and the fraction
-    // bits are not entirely zeros.
-    return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
-  }
-
-  // Returns true if and only if this number is at most kMaxUlps ULP's away
-  // from rhs.  In particular, this function:
-  //
-  //   - returns false if either number is (or both are) NAN.
-  //   - treats really large numbers as almost equal to infinity.
-  //   - thinks +0.0 and -0.0 are 0 DLP's apart.
-  bool AlmostEquals(const FloatingPoint& rhs) const {
-    // The IEEE standard says that any comparison operation involving
-    // a NAN must return false.
-    if (is_nan() || rhs.is_nan()) return false;
-
-    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
-        <= kMaxUlps;
-  }
-
- private:
-  // The data type used to store the actual floating-point number.
-  union FloatingPointUnion {
-    RawType value_;  // The raw floating-point number.
-    Bits bits_;      // The bits that represent the number.
-  };
-
-  // Converts an integer from the sign-and-magnitude representation to
-  // the biased representation.  More precisely, let N be 2 to the
-  // power of (kBitCount - 1), an integer x is represented by the
-  // unsigned number x + N.
-  //
-  // For instance,
-  //
-  //   -N + 1 (the most negative number representable using
-  //          sign-and-magnitude) is represented by 1;
-  //   0      is represented by N; and
-  //   N - 1  (the biggest number representable using
-  //          sign-and-magnitude) is represented by 2N - 1.
-  //
-  // Read http://en.wikipedia.org/wiki/Signed_number_representations
-  // for more details on signed number representations.
-  static Bits SignAndMagnitudeToBiased(const Bits &sam) {
-    if (kSignBitMask & sam) {
-      // sam represents a negative number.
-      return ~sam + 1;
-    } else {
-      // sam represents a positive number.
-      return kSignBitMask | sam;
-    }
-  }
-
-  // Given two numbers in the sign-and-magnitude representation,
-  // returns the distance between them as an unsigned number.
-  static Bits DistanceBetweenSignAndMagnitudeNumbers(const Bits &sam1,
-                                                     const Bits &sam2) {
-    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
-    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
-    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
-  }
-
-  FloatingPointUnion u_;
-};
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the max()
-// macro defined by <windows.h>.
-template <>
-inline float FloatingPoint<float>::Max() { return FLT_MAX; }
-template <>
-inline double FloatingPoint<double>::Max() { return DBL_MAX; }
-
-// Typedefs the instances of the FloatingPoint template class that we
-// care to use.
-typedef FloatingPoint<float> Float;
-typedef FloatingPoint<double> Double;
-
-// In order to catch the mistake of putting tests that use different
-// test fixture classes in the same test suite, we need to assign
-// unique IDs to fixture classes and compare them.  The TypeId type is
-// used to hold such IDs.  The user should treat TypeId as an opaque
-// type: the only operation allowed on TypeId values is to compare
-// them for equality using the == operator.
-typedef const void* TypeId;
-
-template <typename T>
-class TypeIdHelper {
- public:
-  // dummy_ must not have a const type.  Otherwise an overly eager
-  // compiler (e.g. MSVC 7.1 & 8.0) may try to merge
-  // TypeIdHelper<T>::dummy_ for different Ts as an "optimization".
-  static bool dummy_;
-};
-
-template <typename T>
-bool TypeIdHelper<T>::dummy_ = false;
-
-// GetTypeId<T>() returns the ID of type T.  Different values will be
-// returned for different types.  Calling the function twice with the
-// same type argument is guaranteed to return the same ID.
-template <typename T>
-TypeId GetTypeId() {
-  // The compiler is required to allocate a different
-  // TypeIdHelper<T>::dummy_ variable for each T used to instantiate
-  // the template.  Therefore, the address of dummy_ is guaranteed to
-  // be unique.
-  return &(TypeIdHelper<T>::dummy_);
-}
-
-// Returns the type ID of ::testing::Test.  Always call this instead
-// of GetTypeId< ::testing::Test>() to get the type ID of
-// ::testing::Test, as the latter may give the wrong result due to a
-// suspected linker bug when compiling Google Test as a Mac OS X
-// framework.
-GTEST_API_ TypeId GetTestTypeId();
-
-// Defines the abstract factory interface that creates instances
-// of a Test object.
-class TestFactoryBase {
- public:
-  virtual ~TestFactoryBase() {}
-
-  // Creates a test instance to run. The instance is both created and destroyed
-  // within TestInfoImpl::Run()
-  virtual Test* CreateTest() = 0;
-
- protected:
-  TestFactoryBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
-};
-
-// This class provides implementation of TeastFactoryBase interface.
-// It is used in TEST and TEST_F macros.
-template <class TestClass>
-class TestFactoryImpl : public TestFactoryBase {
- public:
-  Test* CreateTest() override { return new TestClass; }
-};
-
-#if GTEST_OS_WINDOWS
-
-// Predicate-formatters for implementing the HRESULT checking macros
-// {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
-// We pass a long instead of HRESULT to avoid causing an
-// include dependency for the HRESULT type.
-GTEST_API_ AssertionResult IsHRESULTSuccess(const char* expr,
-                                            long hr);  // NOLINT
-GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
-                                            long hr);  // NOLINT
-
-#endif  // GTEST_OS_WINDOWS
-
-// Types of SetUpTestSuite() and TearDownTestSuite() functions.
-using SetUpTestSuiteFunc = void (*)();
-using TearDownTestSuiteFunc = void (*)();
-
-struct CodeLocation {
-  CodeLocation(const std::string& a_file, int a_line)
-      : file(a_file), line(a_line) {}
-
-  std::string file;
-  int line;
-};
-
-//  Helper to identify which setup function for TestCase / TestSuite to call.
-//  Only one function is allowed, either TestCase or TestSute but not both.
-
-// Utility functions to help SuiteApiResolver
-using SetUpTearDownSuiteFuncType = void (*)();
-
-inline SetUpTearDownSuiteFuncType GetNotDefaultOrNull(
-    SetUpTearDownSuiteFuncType a, SetUpTearDownSuiteFuncType def) {
-  return a == def ? nullptr : a;
-}
-
-template <typename T>
-//  Note that SuiteApiResolver inherits from T because
-//  SetUpTestSuite()/TearDownTestSuite() could be protected. Ths way
-//  SuiteApiResolver can access them.
-struct SuiteApiResolver : T {
-  // testing::Test is only forward declared at this point. So we make it a
-  // dependend class for the compiler to be OK with it.
-  using Test =
-      typename std::conditional<sizeof(T) != 0, ::testing::Test, void>::type;
-
-  static SetUpTearDownSuiteFuncType GetSetUpCaseOrSuite(const char* filename,
-                                                        int line_num) {
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::SetUpTestCase, &Test::SetUpTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::SetUpTestSuite, &Test::SetUpTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both SetUpTestSuite and SetUpTestCase, please "
-           "make sure there is only one present at "
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-#else
-    (void)(filename);
-    (void)(line_num);
-    return &T::SetUpTestSuite;
-#endif
-  }
-
-  static SetUpTearDownSuiteFuncType GetTearDownCaseOrSuite(const char* filename,
-                                                           int line_num) {
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::TearDownTestCase, &Test::TearDownTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::TearDownTestSuite, &Test::TearDownTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both TearDownTestSuite and TearDownTestCase,"
-           " please make sure there is only one present at"
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-#else
-    (void)(filename);
-    (void)(line_num);
-    return &T::TearDownTestSuite;
-#endif
-  }
-};
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:  name of the test suite
-//   name:             name of the test
-//   type_param:       the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param:      text representation of the test's value parameter,
-//                     or NULL if this is not a type-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory);
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-GTEST_API_ bool SkipPrefix(const char* prefix, const char** pstr);
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// State of the definition of a type-parameterized test suite.
-class GTEST_API_ TypedTestSuitePState {
- public:
-  TypedTestSuitePState() : registered_(false) {}
-
-  // Adds the given test name to defined_test_names_ and return true
-  // if the test suite hasn't been registered; otherwise aborts the
-  // program.
-  bool AddTestName(const char* file, int line, const char* case_name,
-                   const char* test_name) {
-    if (registered_) {
-      fprintf(stderr,
-              "%s Test %s must be defined before "
-              "REGISTER_TYPED_TEST_SUITE_P(%s, ...).\n",
-              FormatFileLocation(file, line).c_str(), test_name, case_name);
-      fflush(stderr);
-      posix::Abort();
-    }
-    registered_tests_.insert(
-        ::std::make_pair(test_name, CodeLocation(file, line)));
-    return true;
-  }
-
-  bool TestExists(const std::string& test_name) const {
-    return registered_tests_.count(test_name) > 0;
-  }
-
-  const CodeLocation& GetCodeLocation(const std::string& test_name) const {
-    RegisteredTestsMap::const_iterator it = registered_tests_.find(test_name);
-    GTEST_CHECK_(it != registered_tests_.end());
-    return it->second;
-  }
-
-  // Verifies that registered_tests match the test names in
-  // defined_test_names_; returns registered_tests if successful, or
-  // aborts the program otherwise.
-  const char* VerifyRegisteredTestNames(const char* test_suite_name,
-                                        const char* file, int line,
-                                        const char* registered_tests);
-
- private:
-  typedef ::std::map<std::string, CodeLocation> RegisteredTestsMap;
-
-  bool registered_;
-  RegisteredTestsMap registered_tests_;
-};
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TypedTestCasePState = TypedTestSuitePState;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Skips to the first non-space char after the first comma in 'str';
-// returns NULL if no comma is found in 'str'.
-inline const char* SkipComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  if (comma == nullptr) {
-    return nullptr;
-  }
-  while (IsSpace(*(++comma))) {}
-  return comma;
-}
-
-// Returns the prefix of 'str' before the first comma in it; returns
-// the entire string if it contains no comma.
-inline std::string GetPrefixUntilComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  return comma == nullptr ? str : std::string(str, comma);
-}
-
-// Splits a given string on a given delimiter, populating a given
-// vector with the fields.
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest);
-
-// The default argument to the template below for the case when the user does
-// not provide a name generator.
-struct DefaultNameGenerator {
-  template <typename T>
-  static std::string GetName(int i) {
-    return StreamableToString(i);
-  }
-};
-
-template <typename Provided = DefaultNameGenerator>
-struct NameGeneratorSelector {
-  typedef Provided type;
-};
-
-template <typename NameGenerator>
-void GenerateNamesRecursively(internal::None, std::vector<std::string>*, int) {}
-
-template <typename NameGenerator, typename Types>
-void GenerateNamesRecursively(Types, std::vector<std::string>* result, int i) {
-  result->push_back(NameGenerator::template GetName<typename Types::Head>(i));
-  GenerateNamesRecursively<NameGenerator>(typename Types::Tail(), result,
-                                          i + 1);
-}
-
-template <typename NameGenerator, typename Types>
-std::vector<std::string> GenerateNames() {
-  std::vector<std::string> result;
-  GenerateNamesRecursively<NameGenerator>(Types(), &result, 0);
-  return result;
-}
-
-// TypeParameterizedTest<Fixture, TestSel, Types>::Register()
-// registers a list of type-parameterized tests with Google Test.  The
-// return value is insignificant - we just need to return something
-// such that we can call this function in a namespace scope.
-//
-// Implementation note: The GTEST_TEMPLATE_ macro declares a template
-// template parameter.  It's defined in gtest-type-util.h.
-template <GTEST_TEMPLATE_ Fixture, class TestSel, typename Types>
-class TypeParameterizedTest {
- public:
-  // 'index' is the index of the test in the type list 'Types'
-  // specified in INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, TestSuite,
-  // Types).  Valid values for 'index' are [0, N - 1] where N is the
-  // length of Types.
-  static bool Register(const char* prefix, const CodeLocation& code_location,
-                       const char* case_name, const char* test_names, int index,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    typedef typename Types::Head Type;
-    typedef Fixture<Type> FixtureClass;
-    typedef typename GTEST_BIND_(TestSel, Type) TestClass;
-
-    // First, registers the first type-parameterized test in the type
-    // list.
-    MakeAndRegisterTestInfo(
-        (std::string(prefix) + (prefix[0] == '\0' ? "" : "/") + case_name +
-         "/" + type_names[static_cast<size_t>(index)])
-            .c_str(),
-        StripTrailingSpaces(GetPrefixUntilComma(test_names)).c_str(),
-        GetTypeName<Type>().c_str(),
-        nullptr,  // No value parameter.
-        code_location, GetTypeId<FixtureClass>(),
-        SuiteApiResolver<TestClass>::GetSetUpCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        SuiteApiResolver<TestClass>::GetTearDownCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        new TestFactoryImpl<TestClass>);
-
-    // Next, recurses (at compile time) with the tail of the type list.
-    return TypeParameterizedTest<Fixture, TestSel,
-                                 typename Types::Tail>::Register(prefix,
-                                                                 code_location,
-                                                                 case_name,
-                                                                 test_names,
-                                                                 index + 1,
-                                                                 type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, class TestSel>
-class TypeParameterizedTest<Fixture, TestSel, internal::None> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       int /*index*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-GTEST_API_ void RegisterTypeParameterizedTestSuite(const char* test_suite_name,
-                                                   CodeLocation code_location);
-GTEST_API_ void RegisterTypeParameterizedTestSuiteInstantiation(
-    const char* case_name);
-
-// TypeParameterizedTestSuite<Fixture, Tests, Types>::Register()
-// registers *all combinations* of 'Tests' and 'Types' with Google
-// Test.  The return value is insignificant - we just need to return
-// something such that we can call this function in a namespace scope.
-template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
-class TypeParameterizedTestSuite {
- public:
-  static bool Register(const char* prefix, CodeLocation code_location,
-                       const TypedTestSuitePState* state, const char* case_name,
-                       const char* test_names,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    RegisterTypeParameterizedTestSuiteInstantiation(case_name);
-    std::string test_name = StripTrailingSpaces(
-        GetPrefixUntilComma(test_names));
-    if (!state->TestExists(test_name)) {
-      fprintf(stderr, "Failed to get code location for test %s.%s at %s.",
-              case_name, test_name.c_str(),
-              FormatFileLocation(code_location.file.c_str(),
-                                 code_location.line).c_str());
-      fflush(stderr);
-      posix::Abort();
-    }
-    const CodeLocation& test_location = state->GetCodeLocation(test_name);
-
-    typedef typename Tests::Head Head;
-
-    // First, register the first test in 'Test' for each type in 'Types'.
-    TypeParameterizedTest<Fixture, Head, Types>::Register(
-        prefix, test_location, case_name, test_names, 0, type_names);
-
-    // Next, recurses (at compile time) with the tail of the test list.
-    return TypeParameterizedTestSuite<Fixture, typename Tests::Tail,
-                                      Types>::Register(prefix, code_location,
-                                                       state, case_name,
-                                                       SkipComma(test_names),
-                                                       type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, typename Types>
-class TypeParameterizedTestSuite<Fixture, internal::None, Types> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const TypedTestSuitePState* /*state*/,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-GTEST_API_ std::string GetCurrentOsStackTraceExceptTop(
-    UnitTest* unit_test, int skip_count);
-
-// Helpers for suppressing warnings on unreachable code or constant
-// condition.
-
-// Always returns true.
-GTEST_API_ bool AlwaysTrue();
-
-// Always returns false.
-inline bool AlwaysFalse() { return !AlwaysTrue(); }
-
-// Helper for suppressing false warning from Clang on a const char*
-// variable declared in a conditional expression always being NULL in
-// the else branch.
-struct GTEST_API_ ConstCharPtr {
-  ConstCharPtr(const char* str) : value(str) {}
-  operator bool() const { return true; }
-  const char* value;
-};
-
-// Helper for declaring std::string within 'if' statement
-// in pre C++17 build environment.
-struct TrueWithString {
-  TrueWithString() = default;
-  explicit TrueWithString(const char* str) : value(str) {}
-  explicit TrueWithString(const std::string& str) : value(str) {}
-  explicit operator bool() const { return true; }
-  std::string value;
-};
-
-// A simple Linear Congruential Generator for generating random
-// numbers with a uniform distribution.  Unlike rand() and srand(), it
-// doesn't use global state (and therefore can't interfere with user
-// code).  Unlike rand_r(), it's portable.  An LCG isn't very random,
-// but it's good enough for our purposes.
-class GTEST_API_ Random {
- public:
-  static const uint32_t kMaxRange = 1u << 31;
-
-  explicit Random(uint32_t seed) : state_(seed) {}
-
-  void Reseed(uint32_t seed) { state_ = seed; }
-
-  // Generates a random number from [0, range).  Crashes if 'range' is
-  // 0 or greater than kMaxRange.
-  uint32_t Generate(uint32_t range);
-
- private:
-  uint32_t state_;
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Random);
-};
-
-// Turns const U&, U&, const U, and U all into U.
-#define GTEST_REMOVE_REFERENCE_AND_CONST_(T) \
-  typename std::remove_const<typename std::remove_reference<T>::type>::type
-
-// HasDebugStringAndShortDebugString<T>::value is a compile-time bool constant
-// that's true if and only if T has methods DebugString() and ShortDebugString()
-// that return std::string.
-template <typename T>
-class HasDebugStringAndShortDebugString {
- private:
-  template <typename C>
-  static auto CheckDebugString(C*) -> typename std::is_same<
-      std::string, decltype(std::declval<const C>().DebugString())>::type;
-  template <typename>
-  static std::false_type CheckDebugString(...);
-
-  template <typename C>
-  static auto CheckShortDebugString(C*) -> typename std::is_same<
-      std::string, decltype(std::declval<const C>().ShortDebugString())>::type;
-  template <typename>
-  static std::false_type CheckShortDebugString(...);
-
-  using HasDebugStringType = decltype(CheckDebugString<T>(nullptr));
-  using HasShortDebugStringType = decltype(CheckShortDebugString<T>(nullptr));
-
- public:
-  static constexpr bool value =
-      HasDebugStringType::value && HasShortDebugStringType::value;
-};
-
-template <typename T>
-constexpr bool HasDebugStringAndShortDebugString<T>::value;
-
-// When the compiler sees expression IsContainerTest<C>(0), if C is an
-// STL-style container class, the first overload of IsContainerTest
-// will be viable (since both C::iterator* and C::const_iterator* are
-// valid types and NULL can be implicitly converted to them).  It will
-// be picked over the second overload as 'int' is a perfect match for
-// the type of argument 0.  If C::iterator or C::const_iterator is not
-// a valid type, the first overload is not viable, and the second
-// overload will be picked.  Therefore, we can determine whether C is
-// a container class by checking the type of IsContainerTest<C>(0).
-// The value of the expression is insignificant.
-//
-// In C++11 mode we check the existence of a const_iterator and that an
-// iterator is properly implemented for the container.
-//
-// For pre-C++11 that we look for both C::iterator and C::const_iterator.
-// The reason is that C++ injects the name of a class as a member of the
-// class itself (e.g. you can refer to class iterator as either
-// 'iterator' or 'iterator::iterator').  If we look for C::iterator
-// only, for example, we would mistakenly think that a class named
-// iterator is an STL container.
-//
-// Also note that the simpler approach of overloading
-// IsContainerTest(typename C::const_iterator*) and
-// IsContainerTest(...) doesn't work with Visual Age C++ and Sun C++.
-typedef int IsContainer;
-template <class C,
-          class Iterator = decltype(::std::declval<const C&>().begin()),
-          class = decltype(::std::declval<const C&>().end()),
-          class = decltype(++::std::declval<Iterator&>()),
-          class = decltype(*::std::declval<Iterator>()),
-          class = typename C::const_iterator>
-IsContainer IsContainerTest(int /* dummy */) {
-  return 0;
-}
-
-typedef char IsNotContainer;
-template <class C>
-IsNotContainer IsContainerTest(long /* dummy */) { return '\0'; }
-
-// Trait to detect whether a type T is a hash table.
-// The heuristic used is that the type contains an inner type `hasher` and does
-// not contain an inner type `reverse_iterator`.
-// If the container is iterable in reverse, then order might actually matter.
-template <typename T>
-struct IsHashTable {
- private:
-  template <typename U>
-  static char test(typename U::hasher*, typename U::reverse_iterator*);
-  template <typename U>
-  static int test(typename U::hasher*, ...);
-  template <typename U>
-  static char test(...);
-
- public:
-  static const bool value = sizeof(test<T>(nullptr, nullptr)) == sizeof(int);
-};
-
-template <typename T>
-const bool IsHashTable<T>::value;
-
-template <typename C,
-          bool = sizeof(IsContainerTest<C>(0)) == sizeof(IsContainer)>
-struct IsRecursiveContainerImpl;
-
-template <typename C>
-struct IsRecursiveContainerImpl<C, false> : public std::false_type {};
-
-// Since the IsRecursiveContainerImpl depends on the IsContainerTest we need to
-// obey the same inconsistencies as the IsContainerTest, namely check if
-// something is a container is relying on only const_iterator in C++11 and
-// is relying on both const_iterator and iterator otherwise
-template <typename C>
-struct IsRecursiveContainerImpl<C, true> {
-  using value_type = decltype(*std::declval<typename C::const_iterator>());
-  using type =
-      std::is_same<typename std::remove_const<
-                       typename std::remove_reference<value_type>::type>::type,
-                   C>;
-};
-
-// IsRecursiveContainer<Type> is a unary compile-time predicate that
-// evaluates whether C is a recursive container type. A recursive container
-// type is a container type whose value_type is equal to the container type
-// itself. An example for a recursive container type is
-// boost::filesystem::path, whose iterator has a value_type that is equal to
-// boost::filesystem::path.
-template <typename C>
-struct IsRecursiveContainer : public IsRecursiveContainerImpl<C>::type {};
-
-// Utilities for native arrays.
-
-// ArrayEq() compares two k-dimensional native arrays using the
-// elements' operator==, where k can be any integer >= 0.  When k is
-// 0, ArrayEq() degenerates into comparing a single pair of values.
-
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline bool ArrayEq(const T& lhs, const U& rhs) { return lhs == rhs; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline bool ArrayEq(const T(&lhs)[N], const U(&rhs)[N]) {
-  return internal::ArrayEq(lhs, N, rhs);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous ArrayEq() function, arrays with different sizes would
-// lead to different copies of the template code.
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs) {
-  for (size_t i = 0; i != size; i++) {
-    if (!internal::ArrayEq(lhs[i], rhs[i]))
-      return false;
-  }
-  return true;
-}
-
-// Finds the first element in the iterator range [begin, end) that
-// equals elem.  Element may be a native array type itself.
-template <typename Iter, typename Element>
-Iter ArrayAwareFind(Iter begin, Iter end, const Element& elem) {
-  for (Iter it = begin; it != end; ++it) {
-    if (internal::ArrayEq(*it, elem))
-      return it;
-  }
-  return end;
-}
-
-// CopyArray() copies a k-dimensional native array using the elements'
-// operator=, where k can be any integer >= 0.  When k is 0,
-// CopyArray() degenerates into copying a single value.
-
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline void CopyArray(const T& from, U* to) { *to = from; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline void CopyArray(const T(&from)[N], U(*to)[N]) {
-  internal::CopyArray(from, N, *to);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous CopyArray() function, arrays with different sizes
-// would lead to different copies of the template code.
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to) {
-  for (size_t i = 0; i != size; i++) {
-    internal::CopyArray(from[i], to + i);
-  }
-}
-
-// The relation between an NativeArray object (see below) and the
-// native array it represents.
-// We use 2 different structs to allow non-copyable types to be used, as long
-// as RelationToSourceReference() is passed.
-struct RelationToSourceReference {};
-struct RelationToSourceCopy {};
-
-// Adapts a native array to a read-only STL-style container.  Instead
-// of the complete STL container concept, this adaptor only implements
-// members useful for Google Mock's container matchers.  New members
-// should be added as needed.  To simplify the implementation, we only
-// support Element being a raw type (i.e. having no top-level const or
-// reference modifier).  It's the client's responsibility to satisfy
-// this requirement.  Element can be an array type itself (hence
-// multi-dimensional arrays are supported).
-template <typename Element>
-class NativeArray {
- public:
-  // STL-style container typedefs.
-  typedef Element value_type;
-  typedef Element* iterator;
-  typedef const Element* const_iterator;
-
-  // Constructs from a native array. References the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceReference) {
-    InitRef(array, count);
-  }
-
-  // Constructs from a native array. Copies the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceCopy) {
-    InitCopy(array, count);
-  }
-
-  // Copy constructor.
-  NativeArray(const NativeArray& rhs) {
-    (this->*rhs.clone_)(rhs.array_, rhs.size_);
-  }
-
-  ~NativeArray() {
-    if (clone_ != &NativeArray::InitRef)
-      delete[] array_;
-  }
-
-  // STL-style container methods.
-  size_t size() const { return size_; }
-  const_iterator begin() const { return array_; }
-  const_iterator end() const { return array_ + size_; }
-  bool operator==(const NativeArray& rhs) const {
-    return size() == rhs.size() &&
-        ArrayEq(begin(), size(), rhs.begin());
-  }
-
- private:
-  static_assert(!std::is_const<Element>::value, "Type must not be const");
-  static_assert(!std::is_reference<Element>::value,
-                "Type must not be a reference");
-
-  // Initializes this object with a copy of the input.
-  void InitCopy(const Element* array, size_t a_size) {
-    Element* const copy = new Element[a_size];
-    CopyArray(array, a_size, copy);
-    array_ = copy;
-    size_ = a_size;
-    clone_ = &NativeArray::InitCopy;
-  }
-
-  // Initializes this object with a reference of the input.
-  void InitRef(const Element* array, size_t a_size) {
-    array_ = array;
-    size_ = a_size;
-    clone_ = &NativeArray::InitRef;
-  }
-
-  const Element* array_;
-  size_t size_;
-  void (NativeArray::*clone_)(const Element*, size_t);
-};
-
-// Backport of std::index_sequence.
-template <size_t... Is>
-struct IndexSequence {
-  using type = IndexSequence;
-};
-
-// Double the IndexSequence, and one if plus_one is true.
-template <bool plus_one, typename T, size_t sizeofT>
-struct DoubleSequence;
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<true, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)..., 2 * sizeofT>;
-};
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<false, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)...>;
-};
-
-// Backport of std::make_index_sequence.
-// It uses O(ln(N)) instantiation depth.
-template <size_t N>
-struct MakeIndexSequenceImpl
-    : DoubleSequence<N % 2 == 1, typename MakeIndexSequenceImpl<N / 2>::type,
-                     N / 2>::type {};
-
-template <>
-struct MakeIndexSequenceImpl<0> : IndexSequence<> {};
-
-template <size_t N>
-using MakeIndexSequence = typename MakeIndexSequenceImpl<N>::type;
-
-template <typename... T>
-using IndexSequenceFor = typename MakeIndexSequence<sizeof...(T)>::type;
-
-template <size_t>
-struct Ignore {
-  Ignore(...);  // NOLINT
-};
-
-template <typename>
-struct ElemFromListImpl;
-template <size_t... I>
-struct ElemFromListImpl<IndexSequence<I...>> {
-  // We make Ignore a template to solve a problem with MSVC.
-  // A non-template Ignore would work fine with `decltype(Ignore(I))...`, but
-  // MSVC doesn't understand how to deal with that pack expansion.
-  // Use `0 * I` to have a single instantiation of Ignore.
-  template <typename R>
-  static R Apply(Ignore<0 * I>..., R (*)(), ...);
-};
-
-template <size_t N, typename... T>
-struct ElemFromList {
-  using type =
-      decltype(ElemFromListImpl<typename MakeIndexSequence<N>::type>::Apply(
-          static_cast<T (*)()>(nullptr)...));
-};
-
-struct FlatTupleConstructTag {};
-
-template <typename... T>
-class FlatTuple;
-
-template <typename Derived, size_t I>
-struct FlatTupleElemBase;
-
-template <typename... T, size_t I>
-struct FlatTupleElemBase<FlatTuple<T...>, I> {
-  using value_type = typename ElemFromList<I, T...>::type;
-  FlatTupleElemBase() = default;
-  template <typename Arg>
-  explicit FlatTupleElemBase(FlatTupleConstructTag, Arg&& t)
-      : value(std::forward<Arg>(t)) {}
-  value_type value;
-};
-
-template <typename Derived, typename Idx>
-struct FlatTupleBase;
-
-template <size_t... Idx, typename... T>
-struct FlatTupleBase<FlatTuple<T...>, IndexSequence<Idx...>>
-    : FlatTupleElemBase<FlatTuple<T...>, Idx>... {
-  using Indices = IndexSequence<Idx...>;
-  FlatTupleBase() = default;
-  template <typename... Args>
-  explicit FlatTupleBase(FlatTupleConstructTag, Args&&... args)
-      : FlatTupleElemBase<FlatTuple<T...>, Idx>(FlatTupleConstructTag{},
-                                                std::forward<Args>(args))... {}
-
-  template <size_t I>
-  const typename ElemFromList<I, T...>::type& Get() const {
-    return FlatTupleElemBase<FlatTuple<T...>, I>::value;
-  }
-
-  template <size_t I>
-  typename ElemFromList<I, T...>::type& Get() {
-    return FlatTupleElemBase<FlatTuple<T...>, I>::value;
-  }
-
-  template <typename F>
-  auto Apply(F&& f) -> decltype(std::forward<F>(f)(this->Get<Idx>()...)) {
-    return std::forward<F>(f)(Get<Idx>()...);
-  }
-
-  template <typename F>
-  auto Apply(F&& f) const -> decltype(std::forward<F>(f)(this->Get<Idx>()...)) {
-    return std::forward<F>(f)(Get<Idx>()...);
-  }
-};
-
-// Analog to std::tuple but with different tradeoffs.
-// This class minimizes the template instantiation depth, thus allowing more
-// elements than std::tuple would. std::tuple has been seen to require an
-// instantiation depth of more than 10x the number of elements in some
-// implementations.
-// FlatTuple and ElemFromList are not recursive and have a fixed depth
-// regardless of T...
-// MakeIndexSequence, on the other hand, it is recursive but with an
-// instantiation depth of O(ln(N)).
-template <typename... T>
-class FlatTuple
-    : private FlatTupleBase<FlatTuple<T...>,
-                            typename MakeIndexSequence<sizeof...(T)>::type> {
-  using Indices = typename FlatTupleBase<
-      FlatTuple<T...>, typename MakeIndexSequence<sizeof...(T)>::type>::Indices;
-
- public:
-  FlatTuple() = default;
-  template <typename... Args>
-  explicit FlatTuple(FlatTupleConstructTag tag, Args&&... args)
-      : FlatTuple::FlatTupleBase(tag, std::forward<Args>(args)...) {}
-
-  using FlatTuple::FlatTupleBase::Apply;
-  using FlatTuple::FlatTupleBase::Get;
-};
-
-// Utility functions to be called with static_assert to induce deprecation
-// warnings.
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TEST_SUITE_P")
-constexpr bool InstantiateTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE_P is deprecated, please use "
-    "TYPED_TEST_SUITE_P")
-constexpr bool TypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE is deprecated, please use "
-    "TYPED_TEST_SUITE")
-constexpr bool TypedTestCaseIsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "REGISTER_TYPED_TEST_CASE_P is deprecated, please use "
-    "REGISTER_TYPED_TEST_SUITE_P")
-constexpr bool RegisterTypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TYPED_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TYPED_TEST_SUITE_P")
-constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
-
-}  // namespace internal
-}  // namespace testing
-
-namespace std {
-// Some standard library implementations use `struct tuple_size` and some use
-// `class tuple_size`. Clang warns about the mismatch.
-// https://reviews.llvm.org/D55466
-#ifdef __clang__
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wmismatched-tags"
-#endif
-template <typename... Ts>
-struct tuple_size<testing::internal::FlatTuple<Ts...>>
-    : std::integral_constant<size_t, sizeof...(Ts)> {};
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-}  // namespace std
-
-#define GTEST_MESSAGE_AT_(file, line, message, result_type) \
-  ::testing::internal::AssertHelper(result_type, file, line, message) \
-    = ::testing::Message()
-
-#define GTEST_MESSAGE_(message, result_type) \
-  GTEST_MESSAGE_AT_(__FILE__, __LINE__, message, result_type)
-
-#define GTEST_FATAL_FAILURE_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kFatalFailure)
-
-#define GTEST_NONFATAL_FAILURE_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kNonFatalFailure)
-
-#define GTEST_SUCCESS_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kSuccess)
-
-#define GTEST_SKIP_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kSkip)
-
-// Suppress MSVC warning 4072 (unreachable code) for the code following
-// statement if it returns or throws (or doesn't return or throw in some
-// situations).
-// NOTE: The "else" is important to keep this expansion to prevent a top-level
-// "else" from attaching to our "if".
-#define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
-  if (::testing::internal::AlwaysTrue()) {                        \
-    statement;                                                    \
-  } else                     /* NOLINT */                         \
-    static_assert(true, "")  // User must have a semicolon after expansion.
-
-#if GTEST_HAS_EXCEPTIONS
-
-namespace testing {
-namespace internal {
-
-class NeverThrown {
- public:
-  const char* what() const noexcept {
-    return "this exception should never be thrown";
-  }
-};
-
-}  // namespace internal
-}  // namespace testing
-
-#if GTEST_HAS_RTTI
-
-#define GTEST_EXCEPTION_TYPE_(e) ::testing::internal::GetTypeName(typeid(e))
-
-#else  // GTEST_HAS_RTTI
-
-#define GTEST_EXCEPTION_TYPE_(e) \
-  std::string { "an std::exception-derived error" }
-
-#endif  // GTEST_HAS_RTTI
-
-#define GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)   \
-  catch (typename std::conditional<                                            \
-         std::is_same<typename std::remove_cv<typename std::remove_reference<  \
-                          expected_exception>::type>::type,                    \
-                      std::exception>::value,                                  \
-         const ::testing::internal::NeverThrown&, const std::exception&>::type \
-             e) {                                                              \
-    gtest_msg.value = "Expected: " #statement                                  \
-                      " throws an exception of type " #expected_exception      \
-                      ".\n  Actual: it throws ";                               \
-    gtest_msg.value += GTEST_EXCEPTION_TYPE_(e);                               \
-    gtest_msg.value += " with description \"";                                 \
-    gtest_msg.value += e.what();                                               \
-    gtest_msg.value += "\".";                                                  \
-    goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);                \
-  }
-
-#else  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_THROW_(statement, expected_exception, fail)              \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                             \
-  if (::testing::internal::TrueWithString gtest_msg{}) {                    \
-    bool gtest_caught_expected = false;                                     \
-    try {                                                                   \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);            \
-    } catch (expected_exception const&) {                                   \
-      gtest_caught_expected = true;                                         \
-    }                                                                       \
-    GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)    \
-    catch (...) {                                                           \
-      gtest_msg.value = "Expected: " #statement                             \
-                        " throws an exception of type " #expected_exception \
-                        ".\n  Actual: it throws a different type.";         \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);           \
-    }                                                                       \
-    if (!gtest_caught_expected) {                                           \
-      gtest_msg.value = "Expected: " #statement                             \
-                        " throws an exception of type " #expected_exception \
-                        ".\n  Actual: it throws nothing.";                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);           \
-    }                                                                       \
-  } else /*NOLINT*/                                                         \
-    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                   \
-        : fail(gtest_msg.value.c_str())
-
-#if GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()                \
-  catch (std::exception const& e) {                               \
-    gtest_msg.value = "it throws ";                               \
-    gtest_msg.value += GTEST_EXCEPTION_TYPE_(e);                  \
-    gtest_msg.value += " with description \"";                    \
-    gtest_msg.value += e.what();                                  \
-    gtest_msg.value += "\".";                                     \
-    goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
-  }
-
-#else  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_NO_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::TrueWithString gtest_msg{}) { \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_() \
-    catch (...) { \
-      gtest_msg.value = "it throws."; \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
-      fail(("Expected: " #statement " doesn't throw an exception.\n" \
-            "  Actual: " + gtest_msg.value).c_str())
-
-#define GTEST_TEST_ANY_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    bool gtest_caught_any = false; \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (...) { \
-      gtest_caught_any = true; \
-    } \
-    if (!gtest_caught_any) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__): \
-      fail("Expected: " #statement " throws an exception.\n" \
-           "  Actual: it doesn't.")
-
-
-// Implements Boolean test assertions such as EXPECT_TRUE. expression can be
-// either a boolean expression or an AssertionResult. text is a textual
-// representation of expression as it was passed into the EXPECT_TRUE.
-#define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar_ = \
-      ::testing::AssertionResult(expression)) \
-    ; \
-  else \
-    fail(::testing::internal::GetBoolAssertionFailureMessage(\
-        gtest_ar_, text, #actual, #expected).c_str())
-
-#define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__): \
-      fail("Expected: " #statement " doesn't generate new fatal " \
-           "failures in the current thread.\n" \
-           "  Actual: it does.")
-
-// Expands to the name of the class that implements the given test.
-#define GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \
-  test_suite_name##_##test_name##_Test
-
-// Helper macro for defining tests.
-#define GTEST_TEST_(test_suite_name, test_name, parent_class, parent_id)      \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_suite_name)) > 1,                \
-                "test_suite_name must not be empty");                         \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_name)) > 1,                      \
-                "test_name must not be empty");                               \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                    \
-      : public parent_class {                                                 \
-   public:                                                                    \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() = default;           \
-    ~GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() override = default; \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
-                                                           test_name));       \
-    GTEST_DISALLOW_MOVE_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
-                                                           test_name));       \
-                                                                              \
-   private:                                                                   \
-    void TestBody() override;                                                 \
-    static ::testing::TestInfo* const test_info_ GTEST_ATTRIBUTE_UNUSED_;     \
-  };                                                                          \
-                                                                              \
-  ::testing::TestInfo* const GTEST_TEST_CLASS_NAME_(test_suite_name,          \
-                                                    test_name)::test_info_ =  \
-      ::testing::internal::MakeAndRegisterTestInfo(                           \
-          #test_suite_name, #test_name, nullptr, nullptr,                     \
-          ::testing::internal::CodeLocation(__FILE__, __LINE__), (parent_id), \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetSetUpCaseOrSuite(__FILE__, __LINE__),         \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetTearDownCaseOrSuite(__FILE__, __LINE__),      \
-          new ::testing::internal::TestFactoryImpl<GTEST_TEST_CLASS_NAME_(    \
-              test_suite_name, test_name)>);                                  \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-param-util.h b/third_party/googletest/googletest/include/gtest/internal/gtest-param-util.h
deleted file mode 100644
index 3e49a6b..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-param-util.h
+++ /dev/null
@@ -1,947 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Type and function utilities for implementing parameterized tests.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-
-#include <ctype.h>
-
-#include <cassert>
-#include <iterator>
-#include <memory>
-#include <set>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest-test-part.h"
-
-namespace testing {
-// Input to a parameterized test name generator, describing a test parameter.
-// Consists of the parameter value and the integer parameter index.
-template <class ParamType>
-struct TestParamInfo {
-  TestParamInfo(const ParamType& a_param, size_t an_index) :
-    param(a_param),
-    index(an_index) {}
-  ParamType param;
-  size_t index;
-};
-
-// A builtin parameterized test name generator which returns the result of
-// testing::PrintToString.
-struct PrintToStringParamName {
-  template <class ParamType>
-  std::string operator()(const TestParamInfo<ParamType>& info) const {
-    return PrintToString(info.param);
-  }
-};
-
-namespace internal {
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// Utility Functions
-
-// Outputs a message explaining invalid registration of different
-// fixture class for the same test suite. This may happen when
-// TEST_P macro is used to define two tests with the same name
-// but in different namespaces.
-GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                           CodeLocation code_location);
-
-template <typename> class ParamGeneratorInterface;
-template <typename> class ParamGenerator;
-
-// Interface for iterating over elements provided by an implementation
-// of ParamGeneratorInterface<T>.
-template <typename T>
-class ParamIteratorInterface {
- public:
-  virtual ~ParamIteratorInterface() {}
-  // A pointer to the base generator instance.
-  // Used only for the purposes of iterator comparison
-  // to make sure that two iterators belong to the same generator.
-  virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
-  // Advances iterator to point to the next element
-  // provided by the generator. The caller is responsible
-  // for not calling Advance() on an iterator equal to
-  // BaseGenerator()->End().
-  virtual void Advance() = 0;
-  // Clones the iterator object. Used for implementing copy semantics
-  // of ParamIterator<T>.
-  virtual ParamIteratorInterface* Clone() const = 0;
-  // Dereferences the current iterator and provides (read-only) access
-  // to the pointed value. It is the caller's responsibility not to call
-  // Current() on an iterator equal to BaseGenerator()->End().
-  // Used for implementing ParamGenerator<T>::operator*().
-  virtual const T* Current() const = 0;
-  // Determines whether the given iterator and other point to the same
-  // element in the sequence generated by the generator.
-  // Used for implementing ParamGenerator<T>::operator==().
-  virtual bool Equals(const ParamIteratorInterface& other) const = 0;
-};
-
-// Class iterating over elements provided by an implementation of
-// ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
-// and implements the const forward iterator concept.
-template <typename T>
-class ParamIterator {
- public:
-  typedef T value_type;
-  typedef const T& reference;
-  typedef ptrdiff_t difference_type;
-
-  // ParamIterator assumes ownership of the impl_ pointer.
-  ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
-  ParamIterator& operator=(const ParamIterator& other) {
-    if (this != &other)
-      impl_.reset(other.impl_->Clone());
-    return *this;
-  }
-
-  const T& operator*() const { return *impl_->Current(); }
-  const T* operator->() const { return impl_->Current(); }
-  // Prefix version of operator++.
-  ParamIterator& operator++() {
-    impl_->Advance();
-    return *this;
-  }
-  // Postfix version of operator++.
-  ParamIterator operator++(int /*unused*/) {
-    ParamIteratorInterface<T>* clone = impl_->Clone();
-    impl_->Advance();
-    return ParamIterator(clone);
-  }
-  bool operator==(const ParamIterator& other) const {
-    return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
-  }
-  bool operator!=(const ParamIterator& other) const {
-    return !(*this == other);
-  }
-
- private:
-  friend class ParamGenerator<T>;
-  explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
-  std::unique_ptr<ParamIteratorInterface<T> > impl_;
-};
-
-// ParamGeneratorInterface<T> is the binary interface to access generators
-// defined in other translation units.
-template <typename T>
-class ParamGeneratorInterface {
- public:
-  typedef T ParamType;
-
-  virtual ~ParamGeneratorInterface() {}
-
-  // Generator interface definition
-  virtual ParamIteratorInterface<T>* Begin() const = 0;
-  virtual ParamIteratorInterface<T>* End() const = 0;
-};
-
-// Wraps ParamGeneratorInterface<T> and provides general generator syntax
-// compatible with the STL Container concept.
-// This class implements copy initialization semantics and the contained
-// ParamGeneratorInterface<T> instance is shared among all copies
-// of the original object. This is possible because that instance is immutable.
-template<typename T>
-class ParamGenerator {
- public:
-  typedef ParamIterator<T> iterator;
-
-  explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
-  ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
-
-  ParamGenerator& operator=(const ParamGenerator& other) {
-    impl_ = other.impl_;
-    return *this;
-  }
-
-  iterator begin() const { return iterator(impl_->Begin()); }
-  iterator end() const { return iterator(impl_->End()); }
-
- private:
-  std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
-};
-
-// Generates values from a range of two comparable values. Can be used to
-// generate sequences of user-defined types that implement operator+() and
-// operator<().
-// This class is used in the Range() function.
-template <typename T, typename IncrementT>
-class RangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  RangeGenerator(T begin, T end, IncrementT step)
-      : begin_(begin), end_(end),
-        step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
-  ~RangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, begin_, 0, step_);
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, end_, end_index_, step_);
-  }
-
- private:
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
-             IncrementT step)
-        : base_(base), value_(value), index_(index), step_(step) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      value_ = static_cast<T>(value_ + step_);
-      index_++;
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    const T* Current() const override { return &value_; }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const int other_index =
-          CheckedDowncastToActualType<const Iterator>(&other)->index_;
-      return index_ == other_index;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-        : ParamIteratorInterface<T>(),
-          base_(other.base_), value_(other.value_), index_(other.index_),
-          step_(other.step_) {}
-
-    // No implementation - assignment is unsupported.
-    void operator=(const Iterator& other);
-
-    const ParamGeneratorInterface<T>* const base_;
-    T value_;
-    int index_;
-    const IncrementT step_;
-  };  // class RangeGenerator::Iterator
-
-  static int CalculateEndIndex(const T& begin,
-                               const T& end,
-                               const IncrementT& step) {
-    int end_index = 0;
-    for (T i = begin; i < end; i = static_cast<T>(i + step))
-      end_index++;
-    return end_index;
-  }
-
-  // No implementation - assignment is unsupported.
-  void operator=(const RangeGenerator& other);
-
-  const T begin_;
-  const T end_;
-  const IncrementT step_;
-  // The index for the end() iterator. All the elements in the generated
-  // sequence are indexed (0-based) to aid iterator comparison.
-  const int end_index_;
-};  // class RangeGenerator
-
-
-// Generates values from a pair of STL-style iterators. Used in the
-// ValuesIn() function. The elements are copied from the source range
-// since the source can be located on the stack, and the generator
-// is likely to persist beyond that stack frame.
-template <typename T>
-class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  template <typename ForwardIterator>
-  ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
-      : container_(begin, end) {}
-  ~ValuesInIteratorRangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, container_.begin());
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, container_.end());
-  }
-
- private:
-  typedef typename ::std::vector<T> ContainerType;
-
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base,
-             typename ContainerType::const_iterator iterator)
-        : base_(base), iterator_(iterator) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      ++iterator_;
-      value_.reset();
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    // We need to use cached value referenced by iterator_ because *iterator_
-    // can return a temporary object (and of type other then T), so just
-    // having "return &*iterator_;" doesn't work.
-    // value_ is updated here and not in Advance() because Advance()
-    // can advance iterator_ beyond the end of the range, and we cannot
-    // detect that fact. The client code, on the other hand, is
-    // responsible for not calling Current() on an out-of-range iterator.
-    const T* Current() const override {
-      if (value_.get() == nullptr) value_.reset(new T(*iterator_));
-      return value_.get();
-    }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      return iterator_ ==
-          CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-          // The explicit constructor call suppresses a false warning
-          // emitted by gcc when supplied with the -Wextra option.
-        : ParamIteratorInterface<T>(),
-          base_(other.base_),
-          iterator_(other.iterator_) {}
-
-    const ParamGeneratorInterface<T>* const base_;
-    typename ContainerType::const_iterator iterator_;
-    // A cached value of *iterator_. We keep it here to allow access by
-    // pointer in the wrapping iterator's operator->().
-    // value_ needs to be mutable to be accessed in Current().
-    // Use of std::unique_ptr helps manage cached value's lifetime,
-    // which is bound by the lifespan of the iterator itself.
-    mutable std::unique_ptr<const T> value_;
-  };  // class ValuesInIteratorRangeGenerator::Iterator
-
-  // No implementation - assignment is unsupported.
-  void operator=(const ValuesInIteratorRangeGenerator& other);
-
-  const ContainerType container_;
-};  // class ValuesInIteratorRangeGenerator
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Default parameterized test name generator, returns a string containing the
-// integer test parameter index.
-template <class ParamType>
-std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
-  Message name_stream;
-  name_stream << info.index;
-  return name_stream.GetString();
-}
-
-template <typename T = int>
-void TestNotEmpty() {
-  static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
-}
-template <typename T = int>
-void TestNotEmpty(const T&) {}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Stores a parameter value and later creates tests parameterized with that
-// value.
-template <class TestClass>
-class ParameterizedTestFactory : public TestFactoryBase {
- public:
-  typedef typename TestClass::ParamType ParamType;
-  explicit ParameterizedTestFactory(ParamType parameter) :
-      parameter_(parameter) {}
-  Test* CreateTest() override {
-    TestClass::SetParam(&parameter_);
-    return new TestClass();
-  }
-
- private:
-  const ParamType parameter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactoryBase is a base class for meta-factories that create
-// test factories for passing into MakeAndRegisterTestInfo function.
-template <class ParamType>
-class TestMetaFactoryBase {
- public:
-  virtual ~TestMetaFactoryBase() {}
-
-  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactory creates test factories for passing into
-// MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
-// ownership of test factory pointer, same factory object cannot be passed
-// into that method twice. But ParameterizedTestSuiteInfo is going to call
-// it for each Test/Parameter value combination. Thus it needs meta factory
-// creator class.
-template <class TestSuite>
-class TestMetaFactory
-    : public TestMetaFactoryBase<typename TestSuite::ParamType> {
- public:
-  using ParamType = typename TestSuite::ParamType;
-
-  TestMetaFactory() {}
-
-  TestFactoryBase* CreateTestFactory(ParamType parameter) override {
-    return new ParameterizedTestFactory<TestSuite>(parameter);
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfoBase is a generic interface
-// to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
-// accumulates test information provided by TEST_P macro invocations
-// and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
-// and uses that information to register all resulting test instances
-// in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
-// a collection of pointers to the ParameterizedTestSuiteInfo objects
-// and calls RegisterTests() on each of them when asked.
-class ParameterizedTestSuiteInfoBase {
- public:
-  virtual ~ParameterizedTestSuiteInfoBase() {}
-
-  // Base part of test suite name for display purposes.
-  virtual const std::string& GetTestSuiteName() const = 0;
-  // Test suite id to verify identity.
-  virtual TypeId GetTestSuiteTypeId() const = 0;
-  // UnitTest class invokes this method to register tests in this
-  // test suite right before running them in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  virtual void RegisterTests() = 0;
-
- protected:
-  ParameterizedTestSuiteInfoBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Report a the name of a test_suit as safe to ignore
-// as the side effect of construction of this type.
-struct MarkAsIgnored {
-  explicit MarkAsIgnored(const char* test_suite);
-};
-
-GTEST_API_ void InsertSyntheticTestCase(const std::string& name,
-                                        CodeLocation location, bool has_test_p);
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
-// macro invocations for a particular test suite and generators
-// obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
-// test suite. It registers tests with all values generated by all
-// generators when asked.
-template <class TestSuite>
-class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
- public:
-  // ParamType and GeneratorCreationFunc are private types but are required
-  // for declarations of public methods AddTestPattern() and
-  // AddTestSuiteInstantiation().
-  using ParamType = typename TestSuite::ParamType;
-  // A function that returns an instance of appropriate generator type.
-  typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
-  using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
-
-  explicit ParameterizedTestSuiteInfo(const char* name,
-                                      CodeLocation code_location)
-      : test_suite_name_(name), code_location_(code_location) {}
-
-  // Test suite base name for display purposes.
-  const std::string& GetTestSuiteName() const override {
-    return test_suite_name_;
-  }
-  // Test suite id to verify identity.
-  TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
-  // TEST_P macro uses AddTestPattern() to record information
-  // about a single test in a LocalTestInfo structure.
-  // test_suite_name is the base name of the test suite (without invocation
-  // prefix). test_base_name is the name of an individual test without
-  // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
-  // test suite base name and DoBar is test base name.
-  void AddTestPattern(const char* test_suite_name, const char* test_base_name,
-                      TestMetaFactoryBase<ParamType>* meta_factory,
-                      CodeLocation code_location) {
-    tests_.push_back(std::shared_ptr<TestInfo>(new TestInfo(
-        test_suite_name, test_base_name, meta_factory, code_location)));
-  }
-  // INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
-  // about a generator.
-  int AddTestSuiteInstantiation(const std::string& instantiation_name,
-                                GeneratorCreationFunc* func,
-                                ParamNameGeneratorFunc* name_func,
-                                const char* file, int line) {
-    instantiations_.push_back(
-        InstantiationInfo(instantiation_name, func, name_func, file, line));
-    return 0;  // Return value used only to run this method in namespace scope.
-  }
-  // UnitTest class invokes this method to register tests in this test suite
-  // right before running tests in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  // UnitTest has a guard to prevent from calling this method more than once.
-  void RegisterTests() override {
-    bool generated_instantiations = false;
-
-    for (typename TestInfoContainer::iterator test_it = tests_.begin();
-         test_it != tests_.end(); ++test_it) {
-      std::shared_ptr<TestInfo> test_info = *test_it;
-      for (typename InstantiationContainer::iterator gen_it =
-               instantiations_.begin(); gen_it != instantiations_.end();
-               ++gen_it) {
-        const std::string& instantiation_name = gen_it->name;
-        ParamGenerator<ParamType> generator((*gen_it->generator)());
-        ParamNameGeneratorFunc* name_func = gen_it->name_func;
-        const char* file = gen_it->file;
-        int line = gen_it->line;
-
-        std::string test_suite_name;
-        if ( !instantiation_name.empty() )
-          test_suite_name = instantiation_name + "/";
-        test_suite_name += test_info->test_suite_base_name;
-
-        size_t i = 0;
-        std::set<std::string> test_param_names;
-        for (typename ParamGenerator<ParamType>::iterator param_it =
-                 generator.begin();
-             param_it != generator.end(); ++param_it, ++i) {
-          generated_instantiations = true;
-
-          Message test_name_stream;
-
-          std::string param_name = name_func(
-              TestParamInfo<ParamType>(*param_it, i));
-
-          GTEST_CHECK_(IsValidParamName(param_name))
-              << "Parameterized test name '" << param_name
-              << "' is invalid, in " << file
-              << " line " << line << std::endl;
-
-          GTEST_CHECK_(test_param_names.count(param_name) == 0)
-              << "Duplicate parameterized test name '" << param_name
-              << "', in " << file << " line " << line << std::endl;
-
-          test_param_names.insert(param_name);
-
-          if (!test_info->test_base_name.empty()) {
-            test_name_stream << test_info->test_base_name << "/";
-          }
-          test_name_stream << param_name;
-          MakeAndRegisterTestInfo(
-              test_suite_name.c_str(), test_name_stream.GetString().c_str(),
-              nullptr,  // No type parameter.
-              PrintToString(*param_it).c_str(), test_info->code_location,
-              GetTestSuiteTypeId(),
-              SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
-              SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
-              test_info->test_meta_factory->CreateTestFactory(*param_it));
-        }  // for param_it
-      }  // for gen_it
-    }  // for test_it
-
-    if (!generated_instantiations) {
-      // There are no generaotrs, or they all generate nothing ...
-      InsertSyntheticTestCase(GetTestSuiteName(), code_location_,
-                              !tests_.empty());
-    }
-  }    // RegisterTests
-
- private:
-  // LocalTestInfo structure keeps information about a single test registered
-  // with TEST_P macro.
-  struct TestInfo {
-    TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
-             TestMetaFactoryBase<ParamType>* a_test_meta_factory,
-             CodeLocation a_code_location)
-        : test_suite_base_name(a_test_suite_base_name),
-          test_base_name(a_test_base_name),
-          test_meta_factory(a_test_meta_factory),
-          code_location(a_code_location) {}
-
-    const std::string test_suite_base_name;
-    const std::string test_base_name;
-    const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
-    const CodeLocation code_location;
-  };
-  using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
-  // Records data received from INSTANTIATE_TEST_SUITE_P macros:
-  //  <Instantiation name, Sequence generator creation function,
-  //     Name generator function, Source file, Source line>
-  struct InstantiationInfo {
-      InstantiationInfo(const std::string &name_in,
-                        GeneratorCreationFunc* generator_in,
-                        ParamNameGeneratorFunc* name_func_in,
-                        const char* file_in,
-                        int line_in)
-          : name(name_in),
-            generator(generator_in),
-            name_func(name_func_in),
-            file(file_in),
-            line(line_in) {}
-
-      std::string name;
-      GeneratorCreationFunc* generator;
-      ParamNameGeneratorFunc* name_func;
-      const char* file;
-      int line;
-  };
-  typedef ::std::vector<InstantiationInfo> InstantiationContainer;
-
-  static bool IsValidParamName(const std::string& name) {
-    // Check for empty string
-    if (name.empty())
-      return false;
-
-    // Check for invalid characters
-    for (std::string::size_type index = 0; index < name.size(); ++index) {
-      if (!isalnum(name[index]) && name[index] != '_')
-        return false;
-    }
-
-    return true;
-  }
-
-  const std::string test_suite_name_;
-  CodeLocation code_location_;
-  TestInfoContainer tests_;
-  InstantiationContainer instantiations_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
-};  // class ParameterizedTestSuiteInfo
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-template <class TestCase>
-using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteRegistry contains a map of
-// ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
-// and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
-// ParameterizedTestSuiteInfo descriptors.
-class ParameterizedTestSuiteRegistry {
- public:
-  ParameterizedTestSuiteRegistry() {}
-  ~ParameterizedTestSuiteRegistry() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      delete test_suite_info;
-    }
-  }
-
-  // Looks up or creates and returns a structure containing information about
-  // tests and instantiations of a particular test suite.
-  template <class TestSuite>
-  ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
-      const char* test_suite_name, CodeLocation code_location) {
-    ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
-    for (auto& test_suite_info : test_suite_infos_) {
-      if (test_suite_info->GetTestSuiteName() == test_suite_name) {
-        if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
-          // Complain about incorrect usage of Google Test facilities
-          // and terminate the program since we cannot guaranty correct
-          // test suite setup and tear-down in this case.
-          ReportInvalidTestSuiteType(test_suite_name, code_location);
-          posix::Abort();
-        } else {
-          // At this point we are sure that the object we found is of the same
-          // type we are looking for, so we downcast it to that type
-          // without further checks.
-          typed_test_info = CheckedDowncastToActualType<
-              ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
-        }
-        break;
-      }
-    }
-    if (typed_test_info == nullptr) {
-      typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
-          test_suite_name, code_location);
-      test_suite_infos_.push_back(typed_test_info);
-    }
-    return typed_test_info;
-  }
-  void RegisterTests() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      test_suite_info->RegisterTests();
-    }
-  }
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  template <class TestCase>
-  ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
-      const char* test_case_name, CodeLocation code_location) {
-    return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
-  }
-
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
- private:
-  using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
-
-  TestSuiteInfoContainer test_suite_infos_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
-};
-
-// Keep track of what type-parameterized test suite are defined and
-// where as well as which are intatiated. This allows susequently
-// identifying suits that are defined but never used.
-class TypeParameterizedTestSuiteRegistry {
- public:
-  // Add a suite definition
-  void RegisterTestSuite(const char* test_suite_name,
-                         CodeLocation code_location);
-
-  // Add an instantiation of a suit.
-  void RegisterInstantiation(const char* test_suite_name);
-
-  // For each suit repored as defined but not reported as instantiation,
-  // emit a test that reports that fact (configurably, as an error).
-  void CheckForInstantiations();
-
- private:
-  struct TypeParameterizedTestSuiteInfo {
-    explicit TypeParameterizedTestSuiteInfo(CodeLocation c)
-        : code_location(c), instantiated(false) {}
-
-    CodeLocation code_location;
-    bool instantiated;
-  };
-
-  std::map<std::string, TypeParameterizedTestSuiteInfo> suites_;
-};
-
-}  // namespace internal
-
-// Forward declarations of ValuesIn(), which is implemented in
-// include/gtest/gtest-param-test.h.
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container);
-
-namespace internal {
-// Used in the Values() function to provide polymorphic capabilities.
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4100)
-#endif
-
-template <typename... Ts>
-class ValueArray {
- public:
-  explicit ValueArray(Ts... v) : v_(FlatTupleConstructTag{}, std::move(v)...) {}
-
-  template <typename T>
-  operator ParamGenerator<T>() const {  // NOLINT
-    return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
-  }
-
- private:
-  template <typename T, size_t... I>
-  std::vector<T> MakeVector(IndexSequence<I...>) const {
-    return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
-  }
-
-  FlatTuple<Ts...> v_;
-};
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
-template <typename... T>
-class CartesianProductGenerator
-    : public ParamGeneratorInterface<::std::tuple<T...>> {
- public:
-  typedef ::std::tuple<T...> ParamType;
-
-  CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
-      : generators_(g) {}
-  ~CartesianProductGenerator() override {}
-
-  ParamIteratorInterface<ParamType>* Begin() const override {
-    return new Iterator(this, generators_, false);
-  }
-  ParamIteratorInterface<ParamType>* End() const override {
-    return new Iterator(this, generators_, true);
-  }
-
- private:
-  template <class I>
-  class IteratorImpl;
-  template <size_t... I>
-  class IteratorImpl<IndexSequence<I...>>
-      : public ParamIteratorInterface<ParamType> {
-   public:
-    IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
-             const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
-        : base_(base),
-          begin_(std::get<I>(generators).begin()...),
-          end_(std::get<I>(generators).end()...),
-          current_(is_end ? end_ : begin_) {
-      ComputeCurrentValue();
-    }
-    ~IteratorImpl() override {}
-
-    const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
-      return base_;
-    }
-    // Advance should not be called on beyond-of-range iterators
-    // so no component iterators must be beyond end of range, either.
-    void Advance() override {
-      assert(!AtEnd());
-      // Advance the last iterator.
-      ++std::get<sizeof...(T) - 1>(current_);
-      // if that reaches end, propagate that up.
-      AdvanceIfEnd<sizeof...(T) - 1>();
-      ComputeCurrentValue();
-    }
-    ParamIteratorInterface<ParamType>* Clone() const override {
-      return new IteratorImpl(*this);
-    }
-
-    const ParamType* Current() const override { return current_value_.get(); }
-
-    bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const IteratorImpl* typed_other =
-          CheckedDowncastToActualType<const IteratorImpl>(&other);
-
-      // We must report iterators equal if they both point beyond their
-      // respective ranges. That can happen in a variety of fashions,
-      // so we have to consult AtEnd().
-      if (AtEnd() && typed_other->AtEnd()) return true;
-
-      bool same = true;
-      bool dummy[] = {
-          (same = same && std::get<I>(current_) ==
-                              std::get<I>(typed_other->current_))...};
-      (void)dummy;
-      return same;
-    }
-
-   private:
-    template <size_t ThisI>
-    void AdvanceIfEnd() {
-      if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
-
-      bool last = ThisI == 0;
-      if (last) {
-        // We are done. Nothing else to propagate.
-        return;
-      }
-
-      constexpr size_t NextI = ThisI - (ThisI != 0);
-      std::get<ThisI>(current_) = std::get<ThisI>(begin_);
-      ++std::get<NextI>(current_);
-      AdvanceIfEnd<NextI>();
-    }
-
-    void ComputeCurrentValue() {
-      if (!AtEnd())
-        current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
-    }
-    bool AtEnd() const {
-      bool at_end = false;
-      bool dummy[] = {
-          (at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
-      (void)dummy;
-      return at_end;
-    }
-
-    const ParamGeneratorInterface<ParamType>* const base_;
-    std::tuple<typename ParamGenerator<T>::iterator...> begin_;
-    std::tuple<typename ParamGenerator<T>::iterator...> end_;
-    std::tuple<typename ParamGenerator<T>::iterator...> current_;
-    std::shared_ptr<ParamType> current_value_;
-  };
-
-  using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
-
-  std::tuple<ParamGenerator<T>...> generators_;
-};
-
-template <class... Gen>
-class CartesianProductHolder {
- public:
-  CartesianProductHolder(const Gen&... g) : generators_(g...) {}
-  template <typename... T>
-  operator ParamGenerator<::std::tuple<T...>>() const {
-    return ParamGenerator<::std::tuple<T...>>(
-        new CartesianProductGenerator<T...>(generators_));
-  }
-
- private:
-  std::tuple<Gen...> generators_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-port-arch.h b/third_party/googletest/googletest/include/gtest/internal/gtest-port-arch.h
deleted file mode 100644
index dd84591..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-port-arch.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the GTEST_OS_* macro.
-// It is separate from gtest-port.h so that custom/gtest-port.h can include it.
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-
-// Determines the platform on which Google Test is compiled.
-#ifdef __CYGWIN__
-# define GTEST_OS_CYGWIN 1
-# elif defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
-#  define GTEST_OS_WINDOWS_MINGW 1
-#  define GTEST_OS_WINDOWS 1
-#elif defined _WIN32
-# define GTEST_OS_WINDOWS 1
-# ifdef _WIN32_WCE
-#  define GTEST_OS_WINDOWS_MOBILE 1
-# elif defined(WINAPI_FAMILY)
-#  include <winapifamily.h>
-#  if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
-#   define GTEST_OS_WINDOWS_RT 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_TV_TITLE)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#   define GTEST_OS_WINDOWS_TV_TITLE 1
-#  else
-    // WINAPI_FAMILY defined but no known partition matched.
-    // Default to desktop.
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  endif
-# else
-#  define GTEST_OS_WINDOWS_DESKTOP 1
-# endif  // _WIN32_WCE
-#elif defined __OS2__
-# define GTEST_OS_OS2 1
-#elif defined __APPLE__
-# define GTEST_OS_MAC 1
-# include <TargetConditionals.h>
-# if TARGET_OS_IPHONE
-#  define GTEST_OS_IOS 1
-# endif
-#elif defined __DragonFly__
-# define GTEST_OS_DRAGONFLY 1
-#elif defined __FreeBSD__
-# define GTEST_OS_FREEBSD 1
-#elif defined __Fuchsia__
-# define GTEST_OS_FUCHSIA 1
-#elif defined(__GLIBC__) && defined(__FreeBSD_kernel__)
-# define GTEST_OS_GNU_KFREEBSD 1
-#elif defined __linux__
-# define GTEST_OS_LINUX 1
-# if defined __ANDROID__
-#  define GTEST_OS_LINUX_ANDROID 1
-# endif
-#elif defined __MVS__
-# define GTEST_OS_ZOS 1
-#elif defined(__sun) && defined(__SVR4)
-# define GTEST_OS_SOLARIS 1
-#elif defined(_AIX)
-# define GTEST_OS_AIX 1
-#elif defined(__hpux)
-# define GTEST_OS_HPUX 1
-#elif defined __native_client__
-# define GTEST_OS_NACL 1
-#elif defined __NetBSD__
-# define GTEST_OS_NETBSD 1
-#elif defined __OpenBSD__
-# define GTEST_OS_OPENBSD 1
-#elif defined __QNX__
-# define GTEST_OS_QNX 1
-#elif defined(__HAIKU__)
-#define GTEST_OS_HAIKU 1
-#elif defined ESP8266
-#define GTEST_OS_ESP8266 1
-#elif defined ESP32
-#define GTEST_OS_ESP32 1
-#elif defined(__XTENSA__)
-#define GTEST_OS_XTENSA 1
-#endif  // __CYGWIN__
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-port.h b/third_party/googletest/googletest/include/gtest/internal/gtest-port.h
deleted file mode 100644
index 0953a78..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-port.h
+++ /dev/null
@@ -1,2389 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Low-level types and utilities for porting Google Test to various
-// platforms.  All macros ending with _ and symbols defined in an
-// internal namespace are subject to change without notice.  Code
-// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
-// end with _ are part of Google Test's public API and can be used by
-// code outside Google Test.
-//
-// This file is fundamental to Google Test.  All other Google Test source
-// files are expected to #include this.  Therefore, it cannot #include
-// any other Google Test header.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-
-// Environment-describing macros
-// -----------------------------
-//
-// Google Test can be used in many different environments.  Macros in
-// this section tell Google Test what kind of environment it is being
-// used in, such that Google Test can provide environment-specific
-// features and implementations.
-//
-// Google Test tries to automatically detect the properties of its
-// environment, so users usually don't need to worry about these
-// macros.  However, the automatic detection is not perfect.
-// Sometimes it's necessary for a user to define some of the following
-// macros in the build script to override Google Test's decisions.
-//
-// If the user doesn't define a macro in the list, Google Test will
-// provide a default definition.  After this header is #included, all
-// macros in this list will be defined to either 1 or 0.
-//
-// Notes to maintainers:
-//   - Each macro here is a user-tweakable knob; do not grow the list
-//     lightly.
-//   - Use #if to key off these macros.  Don't use #ifdef or "#if
-//     defined(...)", which will not work as these macros are ALWAYS
-//     defined.
-//
-//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
-//                              is/isn't available.
-//   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
-//                              are enabled.
-//   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
-//                              expressions are/aren't available.
-//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
-//                              is/isn't available.
-//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
-//                              enabled.
-//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
-//                              std::wstring does/doesn't work (Google Test can
-//                              be used where std::wstring is unavailable).
-//   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
-//                              compiler supports Microsoft's "Structured
-//                              Exception Handling".
-//   GTEST_HAS_STREAM_REDIRECTION
-//                            - Define it to 1/0 to indicate whether the
-//                              platform supports I/O stream redirection using
-//                              dup() and dup2().
-//   GTEST_LINKED_AS_SHARED_LIBRARY
-//                            - Define to 1 when compiling tests that use
-//                              Google Test as a shared library (known as
-//                              DLL on Windows).
-//   GTEST_CREATE_SHARED_LIBRARY
-//                            - Define to 1 when compiling Google Test itself
-//                              as a shared library.
-//   GTEST_DEFAULT_DEATH_TEST_STYLE
-//                            - The default value of --gtest_death_test_style.
-//                              The legacy default has been "fast" in the open
-//                              source version since 2008. The recommended value
-//                              is "threadsafe", and can be set in
-//                              custom/gtest-port.h.
-
-// Platform-indicating macros
-// --------------------------
-//
-// Macros indicating the platform on which Google Test is being used
-// (a macro is defined to 1 if compiled on the given platform;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-//   GTEST_OS_AIX      - IBM AIX
-//   GTEST_OS_CYGWIN   - Cygwin
-//   GTEST_OS_DRAGONFLY - DragonFlyBSD
-//   GTEST_OS_FREEBSD  - FreeBSD
-//   GTEST_OS_FUCHSIA  - Fuchsia
-//   GTEST_OS_GNU_KFREEBSD - GNU/kFreeBSD
-//   GTEST_OS_HAIKU    - Haiku
-//   GTEST_OS_HPUX     - HP-UX
-//   GTEST_OS_LINUX    - Linux
-//     GTEST_OS_LINUX_ANDROID - Google Android
-//   GTEST_OS_MAC      - Mac OS X
-//     GTEST_OS_IOS    - iOS
-//   GTEST_OS_NACL     - Google Native Client (NaCl)
-//   GTEST_OS_NETBSD   - NetBSD
-//   GTEST_OS_OPENBSD  - OpenBSD
-//   GTEST_OS_OS2      - OS/2
-//   GTEST_OS_QNX      - QNX
-//   GTEST_OS_SOLARIS  - Sun Solaris
-//   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
-//     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
-//     GTEST_OS_WINDOWS_MINGW    - MinGW
-//     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
-//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
-//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
-//   GTEST_OS_ZOS      - z/OS
-//
-// Among the platforms, Cygwin, Linux, Mac OS X, and Windows have the
-// most stable support.  Since core members of the Google Test project
-// don't have access to other platforms, support for them may be less
-// stable.  If you notice any problems on your platform, please notify
-// googletestframework@googlegroups.com (patches for fixing them are
-// even more welcome!).
-//
-// It is possible that none of the GTEST_OS_* macros are defined.
-
-// Feature-indicating macros
-// -------------------------
-//
-// Macros indicating which Google Test features are available (a macro
-// is defined to 1 if the corresponding feature is supported;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-// These macros are public so that portable tests can be written.
-// Such tests typically surround code using a feature with an #if
-// which controls that code.  For example:
-//
-// #if GTEST_HAS_DEATH_TEST
-//   EXPECT_DEATH(DoSomethingDeadly());
-// #endif
-//
-//   GTEST_HAS_DEATH_TEST   - death tests
-//   GTEST_HAS_TYPED_TEST   - typed tests
-//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
-//   GTEST_IS_THREADSAFE    - Google Test is thread-safe.
-//   GOOGLETEST_CM0007 DO NOT DELETE
-//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
-//                            GTEST_HAS_POSIX_RE (see above) which users can
-//                            define themselves.
-//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
-//                            the above RE\b(s) are mutually exclusive.
-
-// Misc public macros
-// ------------------
-//
-//   GTEST_FLAG(flag_name)  - references the variable corresponding to
-//                            the given Google Test flag.
-
-// Internal utilities
-// ------------------
-//
-// The following macros and utilities are for Google Test's INTERNAL
-// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
-//
-// Macros for basic C++ coding:
-//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
-//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
-//                              variable don't have to be used.
-//   GTEST_DISALLOW_ASSIGN_   - disables copy operator=.
-//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
-//   GTEST_DISALLOW_MOVE_ASSIGN_   - disables move operator=.
-//   GTEST_DISALLOW_MOVE_AND_ASSIGN_ - disables move ctor and operator=.
-//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
-//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
-//                                        suppressed (constant conditional).
-//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
-//                                        is suppressed.
-//   GTEST_INTERNAL_HAS_ANY - for enabling UniversalPrinter<std::any> or
-//                            UniversalPrinter<absl::any> specializations.
-//   GTEST_INTERNAL_HAS_OPTIONAL - for enabling UniversalPrinter<std::optional>
-//   or
-//                                 UniversalPrinter<absl::optional>
-//                                 specializations.
-//   GTEST_INTERNAL_HAS_STRING_VIEW - for enabling Matcher<std::string_view> or
-//                                    Matcher<absl::string_view>
-//                                    specializations.
-//   GTEST_INTERNAL_HAS_VARIANT - for enabling UniversalPrinter<std::variant> or
-//                                UniversalPrinter<absl::variant>
-//                                specializations.
-//
-// Synchronization:
-//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
-//                            - synchronization primitives.
-//
-// Regular expressions:
-//   RE             - a simple regular expression class using the POSIX
-//                    Extended Regular Expression syntax on UNIX-like platforms
-//                    GOOGLETEST_CM0008 DO NOT DELETE
-//                    or a reduced regular exception syntax on other
-//                    platforms, including Windows.
-// Logging:
-//   GTEST_LOG_()   - logs messages at the specified severity level.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-//
-// Stdout and stderr capturing:
-//   CaptureStdout()     - starts capturing stdout.
-//   GetCapturedStdout() - stops capturing stdout and returns the captured
-//                         string.
-//   CaptureStderr()     - starts capturing stderr.
-//   GetCapturedStderr() - stops capturing stderr and returns the captured
-//                         string.
-//
-// Integer types:
-//   TypeWithSize   - maps an integer to a int type.
-//   TimeInMillis   - integers of known sizes.
-//   BiggestInt     - the biggest signed integer type.
-//
-// Command-line utilities:
-//   GTEST_DECLARE_*()  - declares a flag.
-//   GTEST_DEFINE_*()   - defines a flag.
-//   GetInjectableArgvs() - returns the command line as a vector of strings.
-//
-// Environment variable utilities:
-//   GetEnv()             - gets the value of an environment variable.
-//   BoolFromGTestEnv()   - parses a bool environment variable.
-//   Int32FromGTestEnv()  - parses an int32_t environment variable.
-//   StringFromGTestEnv() - parses a string environment variable.
-//
-// Deprecation warnings:
-//   GTEST_INTERNAL_DEPRECATED(message) - attribute marking a function as
-//                                        deprecated; calling a marked function
-//                                        should generate a compiler warning
-
-#include <ctype.h>   // for isspace, etc
-#include <stddef.h>  // for ptrdiff_t
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <cerrno>
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-#ifndef _WIN32_WCE
-# include <sys/types.h>
-# include <sys/stat.h>
-#endif  // !_WIN32_WCE
-
-#if defined __APPLE__
-# include <AvailabilityMacros.h>
-# include <TargetConditionals.h>
-#endif
-
-#include <iostream>  // NOLINT
-#include <locale>
-#include <memory>
-#include <string>  // NOLINT
-#include <tuple>
-#include <vector>  // NOLINT
-
-#include "gtest/internal/custom/gtest-port.h"
-#include "gtest/internal/gtest-port-arch.h"
-
-#if !defined(GTEST_DEV_EMAIL_)
-# define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
-# define GTEST_FLAG_PREFIX_ "gtest_"
-# define GTEST_FLAG_PREFIX_DASH_ "gtest-"
-# define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
-# define GTEST_NAME_ "Google Test"
-# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
-#endif  // !defined(GTEST_DEV_EMAIL_)
-
-#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-# define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
-#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-
-// Determines the version of gcc that is used to compile this.
-#ifdef __GNUC__
-// 40302 means version 4.3.2.
-# define GTEST_GCC_VER_ \
-    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
-#endif  // __GNUC__
-
-// Macros for disabling Microsoft Visual C++ warnings.
-//
-//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
-//   /* code that triggers warnings C4800 and C4385 */
-//   GTEST_DISABLE_MSC_WARNINGS_POP_()
-#if defined(_MSC_VER)
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
-    __pragma(warning(push))                        \
-    __pragma(warning(disable: warnings))
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
-    __pragma(warning(pop))
-#else
-// Not all compilers are MSVC
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Clang on Windows does not understand MSVC's pragma warning.
-// We need clang-specific way to disable function deprecation warning.
-#ifdef __clang__
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_()                         \
-    _Pragma("clang diagnostic push")                                  \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-implementations\"")
-#define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    _Pragma("clang diagnostic pop")
-#else
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
-# define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Brings in definitions for functions used in the testing::internal::posix
-// namespace (read, write, close, chdir, isatty, stat). We do not currently
-// use them on Windows Mobile.
-#if GTEST_OS_WINDOWS
-# if !GTEST_OS_WINDOWS_MOBILE
-#  include <direct.h>
-#  include <io.h>
-# endif
-// In order to avoid having to include <windows.h>, use forward declaration
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-// MinGW defined _CRITICAL_SECTION and _RTL_CRITICAL_SECTION as two
-// separate (equivalent) structs, instead of using typedef
-typedef struct _CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#else
-// Assume CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
-// This assumption is verified by
-// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
-typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#endif
-#elif GTEST_OS_XTENSA
-#include <unistd.h>
-// Xtensa toolchains define strcasecmp in the string.h header instead of
-// strings.h. string.h is already included.
-#else
-// This assumes that non-Windows OSes provide unistd.h. For OSes where this
-// is not the case, we need to include headers that provide the functions
-// mentioned above.
-# include <unistd.h>
-# include <strings.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_LINUX_ANDROID
-// Used to define __ANDROID_API__ matching the target NDK API level.
-#  include <android/api-level.h>  // NOLINT
-#endif
-
-// Defines this to true if and only if Google Test can use POSIX regular
-// expressions.
-#ifndef GTEST_HAS_POSIX_RE
-# if GTEST_OS_LINUX_ANDROID
-// On Android, <regex.h> is only available starting with Gingerbread.
-#  define GTEST_HAS_POSIX_RE (__ANDROID_API__ >= 9)
-# else
-#define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS && !GTEST_OS_XTENSA)
-# endif
-#endif
-
-#if GTEST_USES_PCRE
-// The appropriate headers have already been included.
-
-#elif GTEST_HAS_POSIX_RE
-
-// On some platforms, <regex.h> needs someone to define size_t, and
-// won't compile otherwise.  We can #include it here as we already
-// included <stdlib.h>, which is guaranteed to define size_t through
-// <stddef.h>.
-# include <regex.h>  // NOLINT
-
-# define GTEST_USES_POSIX_RE 1
-
-#elif GTEST_OS_WINDOWS
-
-// <regex.h> is not available on Windows.  Use our own simple regex
-// implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#else
-
-// <regex.h> may not be available on this platform.  Use our own
-// simple regex implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#endif  // GTEST_USES_PCRE
-
-#ifndef GTEST_HAS_EXCEPTIONS
-// The user didn't tell us whether exceptions are enabled, so we need
-// to figure it out.
-# if defined(_MSC_VER) && defined(_CPPUNWIND)
-// MSVC defines _CPPUNWIND to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__BORLANDC__)
-// C++Builder's implementation of the STL uses the _HAS_EXCEPTIONS
-// macro to enable exceptions, so we'll do the same.
-// Assumes that exceptions are enabled by default.
-#  ifndef _HAS_EXCEPTIONS
-#   define _HAS_EXCEPTIONS 1
-#  endif  // _HAS_EXCEPTIONS
-#  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
-# elif defined(__clang__)
-// clang defines __EXCEPTIONS if and only if exceptions are enabled before clang
-// 220714, but if and only if cleanups are enabled after that. In Obj-C++ files,
-// there can be cleanups for ObjC exceptions which also need cleanups, even if
-// C++ exceptions are disabled. clang has __has_feature(cxx_exceptions) which
-// checks for C++ exceptions starting at clang r206352, but which checked for
-// cleanups prior to that. To reliably check for C++ exception availability with
-// clang, check for
-// __EXCEPTIONS && __has_feature(cxx_exceptions).
-#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
-# elif defined(__GNUC__) && __EXCEPTIONS
-// gcc defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__SUNPRO_CC)
-// Sun Pro CC supports exceptions.  However, there is no compile-time way of
-// detecting whether they are enabled or not.  Therefore, we assume that
-// they are enabled unless the user tells us otherwise.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__IBMCPP__) && __EXCEPTIONS
-// xlC defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__HP_aCC)
-// Exception handling is in effect by default in HP aCC compiler. It has to
-// be turned of by +noeh compiler option if desired.
-#  define GTEST_HAS_EXCEPTIONS 1
-# else
-// For other compilers, we assume exceptions are disabled to be
-// conservative.
-#  define GTEST_HAS_EXCEPTIONS 0
-# endif  // defined(_MSC_VER) || defined(__BORLANDC__)
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#ifndef GTEST_HAS_STD_WSTRING
-// The user didn't tell us whether ::std::wstring is available, so we need
-// to figure it out.
-// Cygwin 1.7 and below doesn't support ::std::wstring.
-// Solaris' libc++ doesn't support it either.  Android has
-// no support for it at least as recent as Froyo (2.2).
-#define GTEST_HAS_STD_WSTRING                                         \
-  (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
-     GTEST_OS_HAIKU || GTEST_OS_ESP32 || GTEST_OS_ESP8266 || GTEST_OS_XTENSA))
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Determines whether RTTI is available.
-#ifndef GTEST_HAS_RTTI
-// The user didn't tell us whether RTTI is enabled, so we need to
-// figure it out.
-
-# ifdef _MSC_VER
-
-#ifdef _CPPRTTI  // MSVC defines this macro if and only if RTTI is enabled.
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-// Starting with version 4.3.2, gcc defines __GXX_RTTI if and only if RTTI is
-// enabled.
-# elif defined(__GNUC__)
-
-#  ifdef __GXX_RTTI
-// When building against STLport with the Android NDK and with
-// -frtti -fno-exceptions, the build fails at link time with undefined
-// references to __cxa_bad_typeid. Note sure if STL or toolchain bug,
-// so disable RTTI when detected.
-#   if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR) && \
-       !defined(__EXCEPTIONS)
-#    define GTEST_HAS_RTTI 0
-#   else
-#    define GTEST_HAS_RTTI 1
-#   endif  // GTEST_OS_LINUX_ANDROID && __STLPORT_MAJOR && !__EXCEPTIONS
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif  // __GXX_RTTI
-
-// Clang defines __GXX_RTTI starting with version 3.0, but its manual recommends
-// using has_feature instead. has_feature(cxx_rtti) is supported since 2.7, the
-// first version with C++ support.
-# elif defined(__clang__)
-
-#  define GTEST_HAS_RTTI __has_feature(cxx_rtti)
-
-// Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
-// both the typeid and dynamic_cast features are present.
-# elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
-
-#  ifdef __RTTI_ALL__
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-# else
-
-// For all other compilers, we assume RTTI is enabled.
-#  define GTEST_HAS_RTTI 1
-
-# endif  // _MSC_VER
-
-#endif  // GTEST_HAS_RTTI
-
-// It's this header's responsibility to #include <typeinfo> when RTTI
-// is enabled.
-#if GTEST_HAS_RTTI
-# include <typeinfo>
-#endif
-
-// Determines whether Google Test can use the pthreads library.
-#ifndef GTEST_HAS_PTHREAD
-// The user didn't tell us explicitly, so we make reasonable assumptions about
-// which platforms have pthreads support.
-//
-// To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
-// to your compiler flags.
-#define GTEST_HAS_PTHREAD                                                      \
-  (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX || GTEST_OS_QNX ||          \
-   GTEST_OS_FREEBSD || GTEST_OS_NACL || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA || \
-   GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_OPENBSD ||          \
-   GTEST_OS_HAIKU)
-#endif  // GTEST_HAS_PTHREAD
-
-#if GTEST_HAS_PTHREAD
-// gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
-// true.
-# include <pthread.h>  // NOLINT
-
-// For timespec and nanosleep, used below.
-# include <time.h>  // NOLINT
-#endif
-
-// Determines whether clone(2) is supported.
-// Usually it will only be available on Linux, excluding
-// Linux on the Itanium architecture.
-// Also see http://linux.die.net/man/2/clone.
-#ifndef GTEST_HAS_CLONE
-// The user didn't tell us, so we need to figure it out.
-
-# if GTEST_OS_LINUX && !defined(__ia64__)
-#  if GTEST_OS_LINUX_ANDROID
-// On Android, clone() became available at different API levels for each 32-bit
-// architecture.
-#    if defined(__LP64__) || \
-        (defined(__arm__) && __ANDROID_API__ >= 9) || \
-        (defined(__mips__) && __ANDROID_API__ >= 12) || \
-        (defined(__i386__) && __ANDROID_API__ >= 17)
-#     define GTEST_HAS_CLONE 1
-#    else
-#     define GTEST_HAS_CLONE 0
-#    endif
-#  else
-#   define GTEST_HAS_CLONE 1
-#  endif
-# else
-#  define GTEST_HAS_CLONE 0
-# endif  // GTEST_OS_LINUX && !defined(__ia64__)
-
-#endif  // GTEST_HAS_CLONE
-
-// Determines whether to support stream redirection. This is used to test
-// output correctness and to implement death tests.
-#ifndef GTEST_HAS_STREAM_REDIRECTION
-// By default, we assume that stream redirection is supported on all
-// platforms except known mobile ones.
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
-    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_XTENSA
-#  define GTEST_HAS_STREAM_REDIRECTION 0
-# else
-#  define GTEST_HAS_STREAM_REDIRECTION 1
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Determines whether to support death tests.
-// pops up a dialog window that cannot be suppressed programmatically.
-#if (GTEST_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS ||             \
-     (GTEST_OS_MAC && !GTEST_OS_IOS) ||                                   \
-     (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER) || GTEST_OS_WINDOWS_MINGW ||  \
-     GTEST_OS_AIX || GTEST_OS_HPUX || GTEST_OS_OPENBSD || GTEST_OS_QNX || \
-     GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA ||           \
-     GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_HAIKU)
-# define GTEST_HAS_DEATH_TEST 1
-#endif
-
-// Determines whether to support type-driven tests.
-
-// Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
-// Sun Pro CC, IBM Visual Age, and HP aCC support.
-#if defined(__GNUC__) || defined(_MSC_VER) || defined(__SUNPRO_CC) || \
-    defined(__IBMCPP__) || defined(__HP_aCC)
-# define GTEST_HAS_TYPED_TEST 1
-# define GTEST_HAS_TYPED_TEST_P 1
-#endif
-
-// Determines whether the system compiler uses UTF-16 for encoding wide strings.
-#define GTEST_WIDE_STRING_USES_UTF16_ \
-  (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_AIX || GTEST_OS_OS2)
-
-// Determines whether test results can be streamed to a socket.
-#if GTEST_OS_LINUX || GTEST_OS_GNU_KFREEBSD || GTEST_OS_DRAGONFLY || \
-    GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# define GTEST_CAN_STREAM_RESULTS_ 1
-#endif
-
-// Defines some utility macros.
-
-// The GNU compiler emits a warning if nested "if" statements are followed by
-// an "else" statement and braces are not used to explicitly disambiguate the
-// "else" binding.  This leads to problems with code like:
-//
-//   if (gate)
-//     ASSERT_*(condition) << "Some message";
-//
-// The "switch (0) case 0:" idiom is used to suppress this.
-#ifdef __INTEL_COMPILER
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_
-#else
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
-#endif
-
-// Use this annotation at the end of a struct/class definition to
-// prevent the compiler from optimizing away instances that are never
-// used.  This is useful when all interesting logic happens inside the
-// c'tor and / or d'tor.  Example:
-//
-//   struct Foo {
-//     Foo() { ... }
-//   } GTEST_ATTRIBUTE_UNUSED_;
-//
-// Also use it after a variable or parameter declaration to tell the
-// compiler the variable/parameter does not have to be used.
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-#elif defined(__clang__)
-# if __has_attribute(unused)
-#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-# endif
-#endif
-#ifndef GTEST_ATTRIBUTE_UNUSED_
-# define GTEST_ATTRIBUTE_UNUSED_
-#endif
-
-// Use this annotation before a function that takes a printf format string.
-#if (defined(__GNUC__) || defined(__clang__)) && !defined(COMPILER_ICC)
-# if defined(__MINGW_PRINTF_FORMAT)
-// MinGW has two different printf implementations. Ensure the format macro
-// matches the selected implementation. See
-// https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/.
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__MINGW_PRINTF_FORMAT, string_index, \
-                                 first_to_check)))
-# else
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__printf__, string_index, first_to_check)))
-# endif
-#else
-# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check)
-#endif
-
-
-// A macro to disallow copy operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_ASSIGN_(type) \
-  type& operator=(type const &) = delete
-
-// A macro to disallow copy constructor and operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type) \
-  type(type const&) = delete;                 \
-  type& operator=(type const&) = delete
-
-// A macro to disallow move operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_MOVE_ASSIGN_(type) \
-  type& operator=(type &&) noexcept = delete
-
-// A macro to disallow move constructor and operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_MOVE_AND_ASSIGN_(type) \
-  type(type&&) noexcept = delete;             \
-  type& operator=(type&&) noexcept = delete
-
-// Tell the compiler to warn about unused return values for functions declared
-// with this macro.  The macro should be used on function declarations
-// following the argument list:
-//
-//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
-#else
-# define GTEST_MUST_USE_RESULT_
-#endif  // __GNUC__ && !COMPILER_ICC
-
-// MS C++ compiler emits warning when a conditional expression is compile time
-// constant. In some contexts this warning is false positive and needs to be
-// suppressed. Use the following two macros in such cases:
-//
-// GTEST_INTENTIONAL_CONST_COND_PUSH_()
-// while (true) {
-// GTEST_INTENTIONAL_CONST_COND_POP_()
-// }
-# define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
-# define GTEST_INTENTIONAL_CONST_COND_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-
-// Determine whether the compiler supports Microsoft's Structured Exception
-// Handling.  This is supported by several Windows compilers but generally
-// does not exist on any other system.
-#ifndef GTEST_HAS_SEH
-// The user didn't tell us, so we need to figure it out.
-
-# if defined(_MSC_VER) || defined(__BORLANDC__)
-// These two compilers are known to support SEH.
-#  define GTEST_HAS_SEH 1
-# else
-// Assume no SEH.
-#  define GTEST_HAS_SEH 0
-# endif
-
-#endif  // GTEST_HAS_SEH
-
-#ifndef GTEST_IS_THREADSAFE
-
-#define GTEST_IS_THREADSAFE                                                 \
-  (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ ||                                     \
-   (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) || \
-   GTEST_HAS_PTHREAD)
-
-#endif  // GTEST_IS_THREADSAFE
-
-// GTEST_API_ qualifies all symbols that must be exported. The definitions below
-// are guarded by #ifndef to give embedders a chance to define GTEST_API_ in
-// gtest/internal/custom/gtest-port.h
-#ifndef GTEST_API_
-
-#ifdef _MSC_VER
-# if GTEST_LINKED_AS_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllimport)
-# elif GTEST_CREATE_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllexport)
-# endif
-#elif __GNUC__ >= 4 || defined(__clang__)
-# define GTEST_API_ __attribute__((visibility ("default")))
-#endif  // _MSC_VER
-
-#endif  // GTEST_API_
-
-#ifndef GTEST_API_
-# define GTEST_API_
-#endif  // GTEST_API_
-
-#ifndef GTEST_DEFAULT_DEATH_TEST_STYLE
-# define GTEST_DEFAULT_DEATH_TEST_STYLE  "fast"
-#endif  // GTEST_DEFAULT_DEATH_TEST_STYLE
-
-#ifdef __GNUC__
-// Ask the compiler to never inline a given function.
-# define GTEST_NO_INLINE_ __attribute__((noinline))
-#else
-# define GTEST_NO_INLINE_
-#endif
-
-// _LIBCPP_VERSION is defined by the libc++ library from the LLVM project.
-#if !defined(GTEST_HAS_CXXABI_H_)
-# if defined(__GLIBCXX__) || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
-#  define GTEST_HAS_CXXABI_H_ 1
-# else
-#  define GTEST_HAS_CXXABI_H_ 0
-# endif
-#endif
-
-// A function level attribute to disable checking for use of uninitialized
-// memory when built with MemorySanitizer.
-#if defined(__clang__)
-# if __has_feature(memory_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
-       __attribute__((no_sanitize_memory))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-# endif  // __has_feature(memory_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-#endif  // __clang__
-
-// A function level attribute to disable AddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(address_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
-       __attribute__((no_sanitize_address))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-# endif  // __has_feature(address_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable HWAddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(hwaddress_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_ \
-       __attribute__((no_sanitize("hwaddress")))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-# endif  // __has_feature(hwaddress_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable ThreadSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(thread_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
-       __attribute__((no_sanitize_thread))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-# endif  // __has_feature(thread_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-#endif  // __clang__
-
-namespace testing {
-
-class Message;
-
-// Legacy imports for backwards compatibility.
-// New code should use std:: names directly.
-using std::get;
-using std::make_tuple;
-using std::tuple;
-using std::tuple_element;
-using std::tuple_size;
-
-namespace internal {
-
-// A secret type that Google Test users don't know about.  It has no
-// definition on purpose.  Therefore it's impossible to create a
-// Secret object, which is what we want.
-class Secret;
-
-// The GTEST_COMPILE_ASSERT_ is a legacy macro used to verify that a compile
-// time expression is true (in new code, use static_assert instead). For
-// example, you could use it to verify the size of a static array:
-//
-//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
-//                         names_incorrect_size);
-//
-// The second argument to the macro must be a valid C++ identifier. If the
-// expression is false, compiler will issue an error containing this identifier.
-#define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
-
-// A helper for suppressing warnings on constant condition.  It just
-// returns 'condition'.
-GTEST_API_ bool IsTrue(bool condition);
-
-// Defines RE.
-
-#if GTEST_USES_PCRE
-// if used, PCRE is injected by custom/gtest-port.h
-#elif GTEST_USES_POSIX_RE || GTEST_USES_SIMPLE_RE
-
-// A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
-// Regular Expression syntax.
-class GTEST_API_ RE {
- public:
-  // A copy constructor is required by the Standard to initialize object
-  // references from r-values.
-  RE(const RE& other) { Init(other.pattern()); }
-
-  // Constructs an RE from a string.
-  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
-
-  RE(const char* regex) { Init(regex); }  // NOLINT
-  ~RE();
-
-  // Returns the string representation of the regex.
-  const char* pattern() const { return pattern_; }
-
-  // FullMatch(str, re) returns true if and only if regular expression re
-  // matches the entire str.
-  // PartialMatch(str, re) returns true if and only if regular expression re
-  // matches a substring of str (including str itself).
-  static bool FullMatch(const ::std::string& str, const RE& re) {
-    return FullMatch(str.c_str(), re);
-  }
-  static bool PartialMatch(const ::std::string& str, const RE& re) {
-    return PartialMatch(str.c_str(), re);
-  }
-
-  static bool FullMatch(const char* str, const RE& re);
-  static bool PartialMatch(const char* str, const RE& re);
-
- private:
-  void Init(const char* regex);
-  const char* pattern_;
-  bool is_valid_;
-
-# if GTEST_USES_POSIX_RE
-
-  regex_t full_regex_;     // For FullMatch().
-  regex_t partial_regex_;  // For PartialMatch().
-
-# else  // GTEST_USES_SIMPLE_RE
-
-  const char* full_pattern_;  // For FullMatch();
-
-# endif
-};
-
-#endif  // GTEST_USES_PCRE
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
-                                                               int line);
-
-// Defines logging utilities:
-//   GTEST_LOG_(severity) - logs messages at the specified severity level. The
-//                          message itself is streamed into the macro.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-
-enum GTestLogSeverity {
-  GTEST_INFO,
-  GTEST_WARNING,
-  GTEST_ERROR,
-  GTEST_FATAL
-};
-
-// Formats log entry severity, provides a stream object for streaming the
-// log message, and terminates the message with a newline when going out of
-// scope.
-class GTEST_API_ GTestLog {
- public:
-  GTestLog(GTestLogSeverity severity, const char* file, int line);
-
-  // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-  ~GTestLog();
-
-  ::std::ostream& GetStream() { return ::std::cerr; }
-
- private:
-  const GTestLogSeverity severity_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
-};
-
-#if !defined(GTEST_LOG_)
-
-# define GTEST_LOG_(severity) \
-    ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
-                                  __FILE__, __LINE__).GetStream()
-
-inline void LogToStderr() {}
-inline void FlushInfoLog() { fflush(nullptr); }
-
-#endif  // !defined(GTEST_LOG_)
-
-#if !defined(GTEST_CHECK_)
-// INTERNAL IMPLEMENTATION - DO NOT USE.
-//
-// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
-// is not satisfied.
-//  Synopsys:
-//    GTEST_CHECK_(boolean_condition);
-//     or
-//    GTEST_CHECK_(boolean_condition) << "Additional message";
-//
-//    This checks the condition and if the condition is not satisfied
-//    it prints message about the condition violation, including the
-//    condition itself, plus additional message streamed into it, if any,
-//    and then it aborts the program. It aborts the program irrespective of
-//    whether it is built in the debug mode or not.
-# define GTEST_CHECK_(condition) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::IsTrue(condition)) \
-      ; \
-    else \
-      GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
-#endif  // !defined(GTEST_CHECK_)
-
-// An all-mode assert to verify that the given POSIX-style function
-// call returns 0 (indicating success).  Known limitation: this
-// doesn't expand to a balanced 'if' statement, so enclose the macro
-// in {} if you need to use it as the only statement in an 'if'
-// branch.
-#define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
-  if (const int gtest_error = (posix_call)) \
-    GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
-                      << gtest_error
-
-// Transforms "T" into "const T&" according to standard reference collapsing
-// rules (this is only needed as a backport for C++98 compilers that do not
-// support reference collapsing). Specifically, it transforms:
-//
-//   char         ==> const char&
-//   const char   ==> const char&
-//   char&        ==> char&
-//   const char&  ==> const char&
-//
-// Note that the non-const reference will not have "const" added. This is
-// standard, and necessary so that "T" can always bind to "const T&".
-template <typename T>
-struct ConstRef { typedef const T& type; };
-template <typename T>
-struct ConstRef<T&> { typedef T& type; };
-
-// The argument T must depend on some template parameters.
-#define GTEST_REFERENCE_TO_CONST_(T) \
-  typename ::testing::internal::ConstRef<T>::type
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Use ImplicitCast_ as a safe version of static_cast for upcasting in
-// the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
-// const Foo*).  When you use ImplicitCast_, the compiler checks that
-// the cast is safe.  Such explicit ImplicitCast_s are necessary in
-// surprisingly many situations where C++ demands an exact type match
-// instead of an argument type convertable to a target type.
-//
-// The syntax for using ImplicitCast_ is the same as for static_cast:
-//
-//   ImplicitCast_<ToType>(expr)
-//
-// ImplicitCast_ would have been part of the C++ standard library,
-// but the proposal was submitted too late.  It will probably make
-// its way into the language in the future.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., implicit_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To>
-inline To ImplicitCast_(To x) { return x; }
-
-// When you upcast (that is, cast a pointer from type Foo to type
-// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
-// always succeed.  When you downcast (that is, cast a pointer from
-// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
-// how do you know the pointer is really of type SubclassOfFoo?  It
-// could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
-// when you downcast, you should use this macro.  In debug mode, we
-// use dynamic_cast<> to double-check the downcast is legal (we die
-// if it's not).  In normal mode, we do the efficient static_cast<>
-// instead.  Thus, it's important to test in debug mode to make sure
-// the cast is legal!
-//    This is the only place in the code we should use dynamic_cast<>.
-// In particular, you SHOULDN'T be using dynamic_cast<> in order to
-// do RTTI (eg code like this:
-//    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
-//    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
-// You should design the code some other way not to need this.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., down_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
-inline To DownCast_(From* f) {  // so we only accept pointers
-  // Ensures that To is a sub-type of From *.  This test is here only
-  // for compile-time type checking, and has no overhead in an
-  // optimized build at run-time, as it will be optimized away
-  // completely.
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (false) {
-  GTEST_INTENTIONAL_CONST_COND_POP_()
-  const To to = nullptr;
-  ::testing::internal::ImplicitCast_<From*>(to);
-  }
-
-#if GTEST_HAS_RTTI
-  // RTTI: debug mode only!
-  GTEST_CHECK_(f == nullptr || dynamic_cast<To>(f) != nullptr);
-#endif
-  return static_cast<To>(f);
-}
-
-// Downcasts the pointer of type Base to Derived.
-// Derived must be a subclass of Base. The parameter MUST
-// point to a class of type Derived, not any subclass of it.
-// When RTTI is available, the function performs a runtime
-// check to enforce this.
-template <class Derived, class Base>
-Derived* CheckedDowncastToActualType(Base* base) {
-#if GTEST_HAS_RTTI
-  GTEST_CHECK_(typeid(*base) == typeid(Derived));
-#endif
-
-#if GTEST_HAS_DOWNCAST_
-  return ::down_cast<Derived*>(base);
-#elif GTEST_HAS_RTTI
-  return dynamic_cast<Derived*>(base);  // NOLINT
-#else
-  return static_cast<Derived*>(base);  // Poor man's downcast.
-#endif
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Defines the stderr capturer:
-//   CaptureStdout     - starts capturing stdout.
-//   GetCapturedStdout - stops capturing stdout and returns the captured string.
-//   CaptureStderr     - starts capturing stderr.
-//   GetCapturedStderr - stops capturing stderr and returns the captured string.
-//
-GTEST_API_ void CaptureStdout();
-GTEST_API_ std::string GetCapturedStdout();
-GTEST_API_ void CaptureStderr();
-GTEST_API_ std::string GetCapturedStderr();
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-// Returns the size (in bytes) of a file.
-GTEST_API_ size_t GetFileSize(FILE* file);
-
-// Reads the entire content of a file as a string.
-GTEST_API_ std::string ReadEntireFile(FILE* file);
-
-// All command line arguments.
-GTEST_API_ std::vector<std::string> GetArgvs();
-
-#if GTEST_HAS_DEATH_TEST
-
-std::vector<std::string> GetInjectableArgvs();
-// Deprecated: pass the args vector by value instead.
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs);
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs);
-void ClearInjectableArgvs();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Defines synchronization primitives.
-#if GTEST_IS_THREADSAFE
-# if GTEST_HAS_PTHREAD
-// Sleeps for (roughly) n milliseconds.  This function is only for testing
-// Google Test's own constructs.  Don't use it in user tests, either
-// directly or indirectly.
-inline void SleepMilliseconds(int n) {
-  const timespec time = {
-    0,                  // 0 seconds.
-    n * 1000L * 1000L,  // And n ms.
-  };
-  nanosleep(&time, nullptr);
-}
-# endif  // GTEST_HAS_PTHREAD
-
-# if GTEST_HAS_NOTIFICATION_
-// Notification has already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_HAS_PTHREAD
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class Notification {
- public:
-  Notification() : notified_(false) {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-  }
-  ~Notification() {
-    pthread_mutex_destroy(&mutex_);
-  }
-
-  // Notifies all threads created with this notification to start. Must
-  // be called from the controller thread.
-  void Notify() {
-    pthread_mutex_lock(&mutex_);
-    notified_ = true;
-    pthread_mutex_unlock(&mutex_);
-  }
-
-  // Blocks until the controller thread notifies. Must be called from a test
-  // thread.
-  void WaitForNotification() {
-    for (;;) {
-      pthread_mutex_lock(&mutex_);
-      const bool notified = notified_;
-      pthread_mutex_unlock(&mutex_);
-      if (notified)
-        break;
-      SleepMilliseconds(10);
-    }
-  }
-
- private:
-  pthread_mutex_t mutex_;
-  bool notified_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-GTEST_API_ void SleepMilliseconds(int n);
-
-// Provides leak-safe Windows kernel handle ownership.
-// Used in death tests and in threading support.
-class GTEST_API_ AutoHandle {
- public:
-  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
-  // avoid including <windows.h> in this header file. Including <windows.h> is
-  // undesirable because it defines a lot of symbols and macros that tend to
-  // conflict with client code. This assumption is verified by
-  // WindowsTypesTest.HANDLEIsVoidStar.
-  typedef void* Handle;
-  AutoHandle();
-  explicit AutoHandle(Handle handle);
-
-  ~AutoHandle();
-
-  Handle Get() const;
-  void Reset();
-  void Reset(Handle handle);
-
- private:
-  // Returns true if and only if the handle is a valid handle object that can be
-  // closed.
-  bool IsCloseable() const;
-
-  Handle handle_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
-};
-
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class GTEST_API_ Notification {
- public:
-  Notification();
-  void Notify();
-  void WaitForNotification();
-
- private:
-  AutoHandle event_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-# endif  // GTEST_HAS_NOTIFICATION_
-
-// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
-// defined, but we don't want to use MinGW's pthreads implementation, which
-// has conformance problems with some versions of the POSIX standard.
-# if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
-
-// As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
-// Consequently, it cannot select a correct instantiation of ThreadWithParam
-// in order to call its Run(). Introducing ThreadWithParamBase as a
-// non-templated base class for ThreadWithParam allows us to bypass this
-// problem.
-class ThreadWithParamBase {
- public:
-  virtual ~ThreadWithParamBase() {}
-  virtual void Run() = 0;
-};
-
-// pthread_create() accepts a pointer to a function type with the C linkage.
-// According to the Standard (7.5/1), function types with different linkages
-// are different even if they are otherwise identical.  Some compilers (for
-// example, SunStudio) treat them as different types.  Since class methods
-// cannot be defined with C-linkage we need to define a free C-function to
-// pass into pthread_create().
-extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
-  static_cast<ThreadWithParamBase*>(thread)->Run();
-  return nullptr;
-}
-
-// Helper class for testing Google Test's multi-threading constructs.
-// To use it, write:
-//
-//   void ThreadFunc(int param) { /* Do things with param */ }
-//   Notification thread_can_start;
-//   ...
-//   // The thread_can_start parameter is optional; you can supply NULL.
-//   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
-//   thread_can_start.Notify();
-//
-// These classes are only for testing Google Test's own constructs. Do
-// not use them in user tests, either directly or indirectly.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : func_(func),
-        param_(param),
-        thread_can_start_(thread_can_start),
-        finished_(false) {
-    ThreadWithParamBase* const base = this;
-    // The thread can be created only after all fields except thread_
-    // have been initialized.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_create(&thread_, nullptr, &ThreadFuncWithCLinkage, base));
-  }
-  ~ThreadWithParam() override { Join(); }
-
-  void Join() {
-    if (!finished_) {
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, nullptr));
-      finished_ = true;
-    }
-  }
-
-  void Run() override {
-    if (thread_can_start_ != nullptr) thread_can_start_->WaitForNotification();
-    func_(param_);
-  }
-
- private:
-  UserThreadFunc* const func_;  // User-supplied thread function.
-  const T param_;  // User-supplied parameter to the thread function.
-  // When non-NULL, used to block execution until the controller thread
-  // notifies.
-  Notification* const thread_can_start_;
-  bool finished_;  // true if and only if we know that the thread function has
-                   // finished.
-  pthread_t thread_;  // The native thread object.
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-# endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
-         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-# if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-// Mutex and ThreadLocal have already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-// Mutex implements mutex on Windows platforms.  It is used in conjunction
-// with class MutexLock:
-//
-//   Mutex mutex;
-//   ...
-//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
-//                            // end of the current scope.
-//
-// A static Mutex *must* be defined or declared using one of the following
-// macros:
-//   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
-//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
-//
-// (A non-static Mutex is defined/declared in the usual way).
-class GTEST_API_ Mutex {
- public:
-  enum MutexType { kStatic = 0, kDynamic = 1 };
-  // We rely on kStaticMutex being 0 as it is to what the linker initializes
-  // type_ in static mutexes.  critical_section_ will be initialized lazily
-  // in ThreadSafeLazyInit().
-  enum StaticConstructorSelector { kStaticMutex = 0 };
-
-  // This constructor intentionally does nothing.  It relies on type_ being
-  // statically initialized to 0 (effectively setting it to kStatic) and on
-  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
-  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
-
-  Mutex();
-  ~Mutex();
-
-  void Lock();
-
-  void Unlock();
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld();
-
- private:
-  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
-  void ThreadSafeLazyInit();
-
-  // Per https://blogs.msdn.microsoft.com/oldnewthing/20040223-00/?p=40503,
-  // we assume that 0 is an invalid value for thread IDs.
-  unsigned int owner_thread_id_;
-
-  // For static mutexes, we rely on these members being initialized to zeros
-  // by the linker.
-  MutexType type_;
-  long critical_section_init_phase_;  // NOLINT
-  GTEST_CRITICAL_SECTION* critical_section_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-    extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  Mutex* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
-// without knowing its type.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Provides a way for a thread to send notifications to a ThreadLocal
-// regardless of its parameter type.
-class ThreadLocalBase {
- public:
-  // Creates a new ValueHolder<T> object holding a default value passed to
-  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
-  // responsibility not to call this when the ThreadLocal<T> instance already
-  // has a value on the current thread.
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
-
- protected:
-  ThreadLocalBase() {}
-  virtual ~ThreadLocalBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
-};
-
-// Maps a thread to a set of ThreadLocals that have values instantiated on that
-// thread and notifies them when the thread exits.  A ThreadLocal instance is
-// expected to persist until all threads it has values on have terminated.
-class GTEST_API_ ThreadLocalRegistry {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance);
-
-  // Invoked when a ThreadLocal instance is destroyed.
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance);
-};
-
-class GTEST_API_ ThreadWithParamBase {
- public:
-  void Join();
-
- protected:
-  class Runnable {
-   public:
-    virtual ~Runnable() {}
-    virtual void Run() = 0;
-  };
-
-  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
-  virtual ~ThreadWithParamBase();
-
- private:
-  AutoHandle thread_;
-};
-
-// Helper class for testing Google Test's multi-threading constructs.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
-  }
-  virtual ~ThreadWithParam() {}
-
- private:
-  class RunnableImpl : public Runnable {
-   public:
-    RunnableImpl(UserThreadFunc* func, T param)
-        : func_(func),
-          param_(param) {
-    }
-    virtual ~RunnableImpl() {}
-    virtual void Run() {
-      func_(param_);
-    }
-
-   private:
-    UserThreadFunc* const func_;
-    const T param_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
-  };
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-
-// Implements thread-local storage on Windows systems.
-//
-//   // Thread 1
-//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
-//
-//   // Thread 2
-//   tl.set(150);  // Changes the value for thread 2 only.
-//   EXPECT_EQ(150, tl.get());
-//
-//   // Thread 1
-//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
-//   tl.set(200);
-//   EXPECT_EQ(200, tl.get());
-//
-// The template type argument T must have a public copy constructor.
-// In addition, the default ThreadLocal constructor requires T to have
-// a public default constructor.
-//
-// The users of a TheadLocal instance have to make sure that all but one
-// threads (including the main one) using that instance have exited before
-// destroying it. Otherwise, the per-thread objects managed for them by the
-// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
-//
-// Google Test only uses global ThreadLocal objects.  That means they
-// will die after main() has returned.  Therefore, no per-thread
-// object managed by Google Test will be leaked as long as all threads
-// using Google Test have exited when main() returns.
-template <typename T>
-class ThreadLocal : public ThreadLocalBase {
- public:
-  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of T.  Can be deleted via its base class without the caller
-  // knowing the type of T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-
-  T* GetOrCreateValue() const {
-    return static_cast<ValueHolder*>(
-        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
-  }
-
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
-    return default_factory_->MakeNewHolder();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    ValueHolder* MakeNewHolder() const override { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    ValueHolder* MakeNewHolder() const override {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# elif GTEST_HAS_PTHREAD
-
-// MutexBase and Mutex implement mutex on pthreads-based platforms.
-class MutexBase {
- public:
-  // Acquires this mutex.
-  void Lock() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
-    owner_ = pthread_self();
-    has_owner_ = true;
-  }
-
-  // Releases this mutex.
-  void Unlock() {
-    // Since the lock is being released the owner_ field should no longer be
-    // considered valid. We don't protect writing to has_owner_ here, as it's
-    // the caller's responsibility to ensure that the current thread holds the
-    // mutex when this is called.
-    has_owner_ = false;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
-  }
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld() const {
-    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
-        << "The current thread is not holding the mutex @" << this;
-  }
-
-  // A static mutex may be used before main() is entered.  It may even
-  // be used before the dynamic initialization stage.  Therefore we
-  // must be able to initialize a static mutex object at link time.
-  // This means MutexBase has to be a POD and its member variables
-  // have to be public.
- public:
-  pthread_mutex_t mutex_;  // The underlying pthread mutex.
-  // has_owner_ indicates whether the owner_ field below contains a valid thread
-  // ID and is therefore safe to inspect (e.g., to use in pthread_equal()). All
-  // accesses to the owner_ field should be protected by a check of this field.
-  // An alternative might be to memset() owner_ to all zeros, but there's no
-  // guarantee that a zero'd pthread_t is necessarily invalid or even different
-  // from pthread_self().
-  bool has_owner_;
-  pthread_t owner_;  // The thread holding the mutex.
-};
-
-// Forward-declares a static mutex.
-#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-     extern ::testing::internal::MutexBase mutex
-
-// Defines and statically (i.e. at link time) initializes a static mutex.
-// The initialization list here does not explicitly initialize each field,
-// instead relying on default initialization for the unspecified fields. In
-// particular, the owner_ field (a pthread_t) is not explicitly initialized.
-// This allows initialization to work whether pthread_t is a scalar or struct.
-// The flag -Wmissing-field-initializers must not be specified for this to work.
-#define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-  ::testing::internal::MutexBase mutex = {PTHREAD_MUTEX_INITIALIZER, false, 0}
-
-// The Mutex class can only be used for mutexes created at runtime. It
-// shares its API with MutexBase otherwise.
-class Mutex : public MutexBase {
- public:
-  Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-    has_owner_ = false;
-  }
-  ~Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(MutexBase* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  MutexBase* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Helpers for ThreadLocal.
-
-// pthread_key_create() requires DeleteThreadLocalValue() to have
-// C-linkage.  Therefore it cannot be templatized to access
-// ThreadLocal<T>.  Hence the need for class
-// ThreadLocalValueHolderBase.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Called by pthread to delete thread-local data stored by
-// pthread_setspecific().
-extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
-  delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
-}
-
-// Implements thread-local storage on pthreads-based systems.
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal()
-      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : key_(CreateKey()),
-        default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() {
-    // Destroys the managed object for the current thread, if any.
-    DeleteThreadLocalValue(pthread_getspecific(key_));
-
-    // Releases resources associated with the key.  This will *not*
-    // delete managed objects for other threads.
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
-  }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of type T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-  static pthread_key_t CreateKey() {
-    pthread_key_t key;
-    // When a thread exits, DeleteThreadLocalValue() will be called on
-    // the object managed for that thread.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_key_create(&key, &DeleteThreadLocalValue));
-    return key;
-  }
-
-  T* GetOrCreateValue() const {
-    ThreadLocalValueHolderBase* const holder =
-        static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
-    if (holder != nullptr) {
-      return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
-    }
-
-    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
-    ThreadLocalValueHolderBase* const holder_base = new_holder;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
-    return new_holder->pointer();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    ValueHolder* MakeNewHolder() const override { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    ValueHolder* MakeNewHolder() const override {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  // A key pthreads uses for looking up per-thread values.
-  const pthread_key_t key_;
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-#else  // GTEST_IS_THREADSAFE
-
-// A dummy implementation of synchronization primitives (mutex, lock,
-// and thread-local variable).  Necessary for compiling Google Test where
-// mutex is not supported - using Google Test in multiple threads is not
-// supported on such platforms.
-
-class Mutex {
- public:
-  Mutex() {}
-  void Lock() {}
-  void Unlock() {}
-  void AssertHeld() const {}
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-  extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex*) {}  // NOLINT
-};
-
-typedef GTestMutexLock MutexLock;
-
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal() : value_() {}
-  explicit ThreadLocal(const T& value) : value_(value) {}
-  T* pointer() { return &value_; }
-  const T* pointer() const { return &value_; }
-  const T& get() const { return value_; }
-  void set(const T& value) { value_ = value; }
- private:
-  T value_;
-};
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-GTEST_API_ size_t GetThreadCount();
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_SEP_ "\\"
-# define GTEST_HAS_ALT_PATH_SEP_ 1
-#else
-# define GTEST_PATH_SEP_ "/"
-# define GTEST_HAS_ALT_PATH_SEP_ 0
-#endif  // GTEST_OS_WINDOWS
-
-// Utilities for char.
-
-// isspace(int ch) and friends accept an unsigned char or EOF.  char
-// may be signed, depending on the compiler (or compiler flags).
-// Therefore we need to cast a char to unsigned char before calling
-// isspace(), etc.
-
-inline bool IsAlpha(char ch) {
-  return isalpha(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsAlNum(char ch) {
-  return isalnum(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsDigit(char ch) {
-  return isdigit(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsLower(char ch) {
-  return islower(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsSpace(char ch) {
-  return isspace(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsUpper(char ch) {
-  return isupper(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsXDigit(char ch) {
-  return isxdigit(static_cast<unsigned char>(ch)) != 0;
-}
-#ifdef __cpp_char8_t
-inline bool IsXDigit(char8_t ch) {
-  return isxdigit(static_cast<unsigned char>(ch)) != 0;
-}
-#endif
-inline bool IsXDigit(char16_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-inline bool IsXDigit(char32_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-inline bool IsXDigit(wchar_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-
-inline char ToLower(char ch) {
-  return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
-}
-inline char ToUpper(char ch) {
-  return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
-}
-
-inline std::string StripTrailingSpaces(std::string str) {
-  std::string::iterator it = str.end();
-  while (it != str.begin() && IsSpace(*--it))
-    it = str.erase(it);
-  return str;
-}
-
-// The testing::internal::posix namespace holds wrappers for common
-// POSIX functions.  These wrappers hide the differences between
-// Windows/MSVC and POSIX systems.  Since some compilers define these
-// standard functions as macros, the wrapper cannot have the same name
-// as the wrapped function.
-
-namespace posix {
-
-// Functions with a different name on Windows.
-
-#if GTEST_OS_WINDOWS
-
-typedef struct _stat StatStruct;
-
-# ifdef __BORLANDC__
-inline int DoIsATTY(int fd) { return isatty(fd); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-# else  // !__BORLANDC__
-#  if GTEST_OS_WINDOWS_MOBILE
-inline int DoIsATTY(int /* fd */) { return 0; }
-#  else
-inline int DoIsATTY(int fd) { return _isatty(fd); }
-#  endif  // GTEST_OS_WINDOWS_MOBILE
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return _stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return _strdup(src); }
-# endif  // __BORLANDC__
-
-# if GTEST_OS_WINDOWS_MOBILE
-inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
-// Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
-// time and thus not defined there.
-# else
-inline int FileNo(FILE* file) { return _fileno(file); }
-inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
-inline int RmDir(const char* dir) { return _rmdir(dir); }
-inline bool IsDir(const StatStruct& st) {
-  return (_S_IFDIR & st.st_mode) != 0;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#elif GTEST_OS_ESP8266
-typedef struct stat StatStruct;
-
-inline int FileNo(FILE* file) { return fileno(file); }
-inline int DoIsATTY(int fd) { return isatty(fd); }
-inline int Stat(const char* path, StatStruct* buf) {
-  // stat function not implemented on ESP8266
-  return 0;
-}
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return strcasecmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-inline int RmDir(const char* dir) { return rmdir(dir); }
-inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
-
-#else
-
-typedef struct stat StatStruct;
-
-inline int FileNo(FILE* file) { return fileno(file); }
-inline int DoIsATTY(int fd) { return isatty(fd); }
-inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return strcasecmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-inline int RmDir(const char* dir) { return rmdir(dir); }
-inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
-
-#endif  // GTEST_OS_WINDOWS
-
-inline int IsATTY(int fd) {
-  // DoIsATTY might change errno (for example ENOTTY in case you redirect stdout
-  // to a file on Linux), which is unexpected, so save the previous value, and
-  // restore it after the call.
-  int savedErrno = errno;
-  int isAttyValue = DoIsATTY(fd);
-  errno = savedErrno;
-
-  return isAttyValue;
-}
-
-// Functions deprecated by MSVC 8.0.
-
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-// ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
-// StrError() aren't needed on Windows CE at this time and thus not
-// defined there.
-
-#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && \
-    !GTEST_OS_WINDOWS_RT && !GTEST_OS_ESP8266 && !GTEST_OS_XTENSA
-inline int ChDir(const char* dir) { return chdir(dir); }
-#endif
-inline FILE* FOpen(const char* path, const char* mode) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  struct wchar_codecvt : public std::codecvt<wchar_t, char, std::mbstate_t> {};
-  std::wstring_convert<wchar_codecvt> converter;
-  std::wstring wide_path = converter.from_bytes(path);
-  std::wstring wide_mode = converter.from_bytes(mode);
-  return _wfopen(wide_path.c_str(), wide_mode.c_str());
-#else  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  return fopen(path, mode);
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-}
-#if !GTEST_OS_WINDOWS_MOBILE
-inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
-  return freopen(path, mode, stream);
-}
-inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
-#endif
-inline int FClose(FILE* fp) { return fclose(fp); }
-#if !GTEST_OS_WINDOWS_MOBILE
-inline int Read(int fd, void* buf, unsigned int count) {
-  return static_cast<int>(read(fd, buf, count));
-}
-inline int Write(int fd, const void* buf, unsigned int count) {
-  return static_cast<int>(write(fd, buf, count));
-}
-inline int Close(int fd) { return close(fd); }
-inline const char* StrError(int errnum) { return strerror(errnum); }
-#endif
-inline const char* GetEnv(const char* name) {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
-    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_XTENSA
-  // We are on an embedded platform, which has no environment variables.
-  static_cast<void>(name);  // To prevent 'unused argument' warning.
-  return nullptr;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // Environment variables which we programmatically clear will be set to the
-  // empty string rather than unset (NULL).  Handle that case.
-  const char* const env = getenv(name);
-  return (env != nullptr && env[0] != '\0') ? env : nullptr;
-#else
-  return getenv(name);
-#endif
-}
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Windows CE has no C library. The abort() function is used in
-// several places in Google Test. This implementation provides a reasonable
-// imitation of standard behaviour.
-[[noreturn]] void Abort();
-#else
-[[noreturn]] inline void Abort() { abort(); }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-}  // namespace posix
-
-// MSVC "deprecates" snprintf and issues warnings wherever it is used.  In
-// order to avoid these warnings, we need to use _snprintf or _snprintf_s on
-// MSVC-based platforms.  We map the GTEST_SNPRINTF_ macro to the appropriate
-// function in order to achieve that.  We use macro definition here because
-// snprintf is a variadic function.
-#if _MSC_VER && !GTEST_OS_WINDOWS_MOBILE
-// MSVC 2005 and above support variadic macros.
-# define GTEST_SNPRINTF_(buffer, size, format, ...) \
-     _snprintf_s(buffer, size, size, format, __VA_ARGS__)
-#elif defined(_MSC_VER)
-// Windows CE does not define _snprintf_s
-# define GTEST_SNPRINTF_ _snprintf
-#else
-# define GTEST_SNPRINTF_ snprintf
-#endif
-
-// The biggest signed integer type the compiler supports.
-//
-// long long is guaranteed to be at least 64-bits in C++11.
-using BiggestInt = long long;  // NOLINT
-
-// The maximum number a BiggestInt can represent.
-constexpr BiggestInt kMaxBiggestInt = (std::numeric_limits<BiggestInt>::max)();
-
-// This template class serves as a compile-time function from size to
-// type.  It maps a size in bytes to a primitive type with that
-// size. e.g.
-//
-//   TypeWithSize<4>::UInt
-//
-// is typedef-ed to be unsigned int (unsigned integer made up of 4
-// bytes).
-//
-// Such functionality should belong to STL, but I cannot find it
-// there.
-//
-// Google Test uses this class in the implementation of floating-point
-// comparison.
-//
-// For now it only handles UInt (unsigned int) as that's all Google Test
-// needs.  Other types can be easily added in the future if need
-// arises.
-template <size_t size>
-class TypeWithSize {
- public:
-  // This prevents the user from using TypeWithSize<N> with incorrect
-  // values of N.
-  using UInt = void;
-};
-
-// The specialization for size 4.
-template <>
-class TypeWithSize<4> {
- public:
-  using Int = std::int32_t;
-  using UInt = std::uint32_t;
-};
-
-// The specialization for size 8.
-template <>
-class TypeWithSize<8> {
- public:
-  using Int = std::int64_t;
-  using UInt = std::uint64_t;
-};
-
-// Integer types of known sizes.
-using TimeInMillis = int64_t;  // Represents time in milliseconds.
-
-// Utilities for command line flags and environment variables.
-
-// Macro for referencing flags.
-#if !defined(GTEST_FLAG)
-# define GTEST_FLAG(name) FLAGS_gtest_##name
-#endif  // !defined(GTEST_FLAG)
-
-#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-# define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
-#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-
-#if !defined(GTEST_DECLARE_bool_)
-# define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
-
-// Macros for declaring flags.
-# define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
-# define GTEST_DECLARE_int32_(name) \
-    GTEST_API_ extern std::int32_t GTEST_FLAG(name)
-# define GTEST_DECLARE_string_(name) \
-    GTEST_API_ extern ::std::string GTEST_FLAG(name)
-
-// Macros for defining flags.
-# define GTEST_DEFINE_bool_(name, default_val, doc) \
-    GTEST_API_ bool GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_int32_(name, default_val, doc) \
-    GTEST_API_ std::int32_t GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_string_(name, default_val, doc) \
-    GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
-
-#endif  // !defined(GTEST_DECLARE_bool_)
-
-// Thread annotations
-#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-# define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
-# define GTEST_LOCK_EXCLUDED_(locks)
-#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
-// to *value and returns true; otherwise leaves *value unchanged and returns
-// false.
-GTEST_API_ bool ParseInt32(const Message& src_text, const char* str,
-                           int32_t* value);
-
-// Parses a bool/int32_t/string from the environment variable
-// corresponding to the given Google Test flag.
-bool BoolFromGTestEnv(const char* flag, bool default_val);
-GTEST_API_ int32_t Int32FromGTestEnv(const char* flag, int32_t default_val);
-std::string OutputFlagAlsoCheckEnvVar();
-const char* StringFromGTestEnv(const char* flag, const char* default_val);
-
-}  // namespace internal
-}  // namespace testing
-
-#if !defined(GTEST_INTERNAL_DEPRECATED)
-
-// Internal Macro to mark an API deprecated, for googletest usage only
-// Usage: class GTEST_INTERNAL_DEPRECATED(message) MyClass or
-// GTEST_INTERNAL_DEPRECATED(message) <return_type> myFunction(); Every usage of
-// a deprecated entity will trigger a warning when compiled with
-// `-Wdeprecated-declarations` option (clang, gcc, any __GNUC__ compiler).
-// For msvc /W3 option will need to be used
-// Note that for 'other' compilers this macro evaluates to nothing to prevent
-// compilations errors.
-#if defined(_MSC_VER)
-#define GTEST_INTERNAL_DEPRECATED(message) __declspec(deprecated(message))
-#elif defined(__GNUC__)
-#define GTEST_INTERNAL_DEPRECATED(message) __attribute__((deprecated(message)))
-#else
-#define GTEST_INTERNAL_DEPRECATED(message)
-#endif
-
-#endif  // !defined(GTEST_INTERNAL_DEPRECATED)
-
-#if GTEST_HAS_ABSL
-// Always use absl::any for UniversalPrinter<> specializations if googletest
-// is built with absl support.
-#define GTEST_INTERNAL_HAS_ANY 1
-#include "absl/types/any.h"
-namespace testing {
-namespace internal {
-using Any = ::absl::any;
-}  // namespace internal
-}  // namespace testing
-#else
-#ifdef __has_include
-#if __has_include(<any>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::any for UniversalPrinter<>
-// specializations.
-#define GTEST_INTERNAL_HAS_ANY 1
-#include <any>
-namespace testing {
-namespace internal {
-using Any = ::std::any;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::any is not
-// supported.
-#endif  // __has_include(<any>) && __cplusplus >= 201703L
-#endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#if GTEST_HAS_ABSL
-// Always use absl::optional for UniversalPrinter<> specializations if
-// googletest is built with absl support.
-#define GTEST_INTERNAL_HAS_OPTIONAL 1
-#include "absl/types/optional.h"
-namespace testing {
-namespace internal {
-template <typename T>
-using Optional = ::absl::optional<T>;
-}  // namespace internal
-}  // namespace testing
-#else
-#ifdef __has_include
-#if __has_include(<optional>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::optional for UniversalPrinter<>
-// specializations.
-#define GTEST_INTERNAL_HAS_OPTIONAL 1
-#include <optional>
-namespace testing {
-namespace internal {
-template <typename T>
-using Optional = ::std::optional<T>;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::optional is not
-// supported.
-#endif  // __has_include(<optional>) && __cplusplus >= 201703L
-#endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#if GTEST_HAS_ABSL
-// Always use absl::string_view for Matcher<> specializations if googletest
-// is built with absl support.
-# define GTEST_INTERNAL_HAS_STRING_VIEW 1
-#include "absl/strings/string_view.h"
-namespace testing {
-namespace internal {
-using StringView = ::absl::string_view;
-}  // namespace internal
-}  // namespace testing
-#else
-# ifdef __has_include
-#   if __has_include(<string_view>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::string_view for Matcher<>
-// specializations.
-#   define GTEST_INTERNAL_HAS_STRING_VIEW 1
-#include <string_view>
-namespace testing {
-namespace internal {
-using StringView = ::std::string_view;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::string_view is not
-// supported.
-#  endif  // __has_include(<string_view>) && __cplusplus >= 201703L
-# endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#if GTEST_HAS_ABSL
-// Always use absl::variant for UniversalPrinter<> specializations if googletest
-// is built with absl support.
-#define GTEST_INTERNAL_HAS_VARIANT 1
-#include "absl/types/variant.h"
-namespace testing {
-namespace internal {
-template <typename... T>
-using Variant = ::absl::variant<T...>;
-}  // namespace internal
-}  // namespace testing
-#else
-#ifdef __has_include
-#if __has_include(<variant>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::variant for UniversalPrinter<>
-// specializations.
-#define GTEST_INTERNAL_HAS_VARIANT 1
-#include <variant>
-namespace testing {
-namespace internal {
-template <typename... T>
-using Variant = ::std::variant<T...>;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::variant is not supported.
-#endif  // __has_include(<variant>) && __cplusplus >= 201703L
-#endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-string.h b/third_party/googletest/googletest/include/gtest/internal/gtest-string.h
deleted file mode 100644
index 10f774f..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-string.h
+++ /dev/null
@@ -1,175 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares the String class and functions used internally by
-// Google Test.  They are subject to change without notice. They should not used
-// by code external to Google Test.
-//
-// This header file is #included by gtest-internal.h.
-// It should not be #included by other files.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-
-#ifdef __BORLANDC__
-// string.h is not guaranteed to provide strcpy on C++ Builder.
-# include <mem.h>
-#endif
-
-#include <string.h>
-#include <cstdint>
-#include <string>
-
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-namespace internal {
-
-// String - an abstract class holding static string utilities.
-class GTEST_API_ String {
- public:
-  // Static utility methods
-
-  // Clones a 0-terminated C string, allocating memory using new.  The
-  // caller is responsible for deleting the return value using
-  // delete[].  Returns the cloned string, or NULL if the input is
-  // NULL.
-  //
-  // This is different from strdup() in string.h, which allocates
-  // memory using malloc().
-  static const char* CloneCString(const char* c_str);
-
-#if GTEST_OS_WINDOWS_MOBILE
-  // Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
-  // able to pass strings to Win32 APIs on CE we need to convert them
-  // to 'Unicode', UTF-16.
-
-  // Creates a UTF-16 wide string from the given ANSI string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the wide string, or NULL if the
-  // input is NULL.
-  //
-  // The wide string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static LPCWSTR AnsiToUtf16(const char* c_str);
-
-  // Creates an ANSI string from the given wide string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the ANSI string, or NULL if the
-  // input is NULL.
-  //
-  // The returned string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static const char* Utf16ToAnsi(LPCWSTR utf16_str);
-#endif
-
-  // Compares two C strings.  Returns true if and only if they have the same
-  // content.
-  //
-  // Unlike strcmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CStringEquals(const char* lhs, const char* rhs);
-
-  // Converts a wide C string to a String using the UTF-8 encoding.
-  // NULL will be converted to "(null)".  If an error occurred during
-  // the conversion, "(failed to convert from wide string)" is
-  // returned.
-  static std::string ShowWideCString(const wchar_t* wide_c_str);
-
-  // Compares two wide C strings.  Returns true if and only if they have the
-  // same content.
-  //
-  // Unlike wcscmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
-
-  // Compares two C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike strcasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CaseInsensitiveCStringEquals(const char* lhs,
-                                           const char* rhs);
-
-  // Compares two wide C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike wcscasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL wide C string,
-  // including the empty string.
-  // NB: The implementations on different platforms slightly differ.
-  // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-  // environment variable. On GNU platform this method uses wcscasecmp
-  // which compares according to LC_CTYPE category of the current locale.
-  // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-  // current locale.
-  static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                               const wchar_t* rhs);
-
-  // Returns true if and only if the given string ends with the given suffix,
-  // ignoring case. Any string is considered to end with an empty suffix.
-  static bool EndsWithCaseInsensitive(
-      const std::string& str, const std::string& suffix);
-
-  // Formats an int value as "%02d".
-  static std::string FormatIntWidth2(int value);  // "%02d" for width == 2
-
-  // Formats an int value to given width with leading zeros.
-  static std::string FormatIntWidthN(int value, int width);
-
-  // Formats an int value as "%X".
-  static std::string FormatHexInt(int value);
-
-  // Formats an int value as "%X".
-  static std::string FormatHexUInt32(uint32_t value);
-
-  // Formats a byte as "%02X".
-  static std::string FormatByte(unsigned char value);
-
- private:
-  String();  // Not meant to be instantiated.
-};  // class String
-
-// Gets the content of the stringstream's buffer as an std::string.  Each '\0'
-// character in the buffer is replaced with "\\0".
-GTEST_API_ std::string StringStreamToString(::std::stringstream* stream);
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
diff --git a/third_party/googletest/googletest/include/gtest/internal/gtest-type-util.h b/third_party/googletest/googletest/include/gtest/internal/gtest-type-util.h
deleted file mode 100644
index b87a2e2..0000000
--- a/third_party/googletest/googletest/include/gtest/internal/gtest-type-util.h
+++ /dev/null
@@ -1,183 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Type utilities needed for implementing typed and type-parameterized
-// tests.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
-// libstdc++ (which is where cxxabi.h comes from).
-# if GTEST_HAS_CXXABI_H_
-#  include <cxxabi.h>
-# elif defined(__HP_aCC)
-#  include <acxx_demangle.h>
-# endif  // GTEST_HASH_CXXABI_H_
-
-namespace testing {
-namespace internal {
-
-// Canonicalizes a given name with respect to the Standard C++ Library.
-// This handles removing the inline namespace within `std` that is
-// used by various standard libraries (e.g., `std::__1`).  Names outside
-// of namespace std are returned unmodified.
-inline std::string CanonicalizeForStdLibVersioning(std::string s) {
-  static const char prefix[] = "std::__";
-  if (s.compare(0, strlen(prefix), prefix) == 0) {
-    std::string::size_type end = s.find("::", strlen(prefix));
-    if (end != s.npos) {
-      // Erase everything between the initial `std` and the second `::`.
-      s.erase(strlen("std"), end - strlen("std"));
-    }
-  }
-  return s;
-}
-
-#if GTEST_HAS_RTTI
-// GetTypeName(const std::type_info&) returns a human-readable name of type T.
-inline std::string GetTypeName(const std::type_info& type) {
-  const char* const name = type.name();
-#if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
-  int status = 0;
-  // gcc's implementation of typeid(T).name() mangles the type name,
-  // so we have to demangle it.
-#if GTEST_HAS_CXXABI_H_
-  using abi::__cxa_demangle;
-#endif  // GTEST_HAS_CXXABI_H_
-  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
-  const std::string name_str(status == 0 ? readable_name : name);
-  free(readable_name);
-  return CanonicalizeForStdLibVersioning(name_str);
-#else
-  return name;
-#endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
-}
-#endif  // GTEST_HAS_RTTI
-
-// GetTypeName<T>() returns a human-readable name of type T if and only if
-// RTTI is enabled, otherwise it returns a dummy type name.
-// NB: This function is also used in Google Mock, so don't move it inside of
-// the typed-test-only section below.
-template <typename T>
-std::string GetTypeName() {
-#if GTEST_HAS_RTTI
-  return GetTypeName(typeid(T));
-#else
-  return "<type>";
-#endif  // GTEST_HAS_RTTI
-}
-
-// A unique type indicating an empty node
-struct None {};
-
-# define GTEST_TEMPLATE_ template <typename T> class
-
-// The template "selector" struct TemplateSel<Tmpl> is used to
-// represent Tmpl, which must be a class template with one type
-// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
-// as the type Tmpl<T>.  This allows us to actually instantiate the
-// template "selected" by TemplateSel<Tmpl>.
-//
-// This trick is necessary for simulating typedef for class templates,
-// which C++ doesn't support directly.
-template <GTEST_TEMPLATE_ Tmpl>
-struct TemplateSel {
-  template <typename T>
-  struct Bind {
-    typedef Tmpl<T> type;
-  };
-};
-
-# define GTEST_BIND_(TmplSel, T) \
-  TmplSel::template Bind<T>::type
-
-template <GTEST_TEMPLATE_ Head_, GTEST_TEMPLATE_... Tail_>
-struct Templates {
-  using Head = TemplateSel<Head_>;
-  using Tail = Templates<Tail_...>;
-};
-
-template <GTEST_TEMPLATE_ Head_>
-struct Templates<Head_> {
-  using Head = TemplateSel<Head_>;
-  using Tail = None;
-};
-
-// Tuple-like type lists
-template <typename Head_, typename... Tail_>
-struct Types {
-  using Head = Head_;
-  using Tail = Types<Tail_...>;
-};
-
-template <typename Head_>
-struct Types<Head_> {
-  using Head = Head_;
-  using Tail = None;
-};
-
-// Helper metafunctions to tell apart a single type from types
-// generated by ::testing::Types
-template <typename... Ts>
-struct ProxyTypeList {
-  using type = Types<Ts...>;
-};
-
-template <typename>
-struct is_proxy_type_list : std::false_type {};
-
-template <typename... Ts>
-struct is_proxy_type_list<ProxyTypeList<Ts...>> : std::true_type {};
-
-// Generator which conditionally creates type lists.
-// It recognizes if a requested type list should be created
-// and prevents creating a new type list nested within another one.
-template <typename T>
-struct GenerateTypeList {
- private:
-  using proxy = typename std::conditional<is_proxy_type_list<T>::value, T,
-                                          ProxyTypeList<T>>::type;
-
- public:
-  using type = typename proxy::type;
-};
-
-}  // namespace internal
-
-template <typename... Ts>
-using Types = internal::ProxyTypeList<Ts...>;
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
diff --git a/third_party/googletest/googletest/samples/prime_tables.h b/third_party/googletest/googletest/samples/prime_tables.h
deleted file mode 100644
index 3a10352..0000000
--- a/third_party/googletest/googletest/samples/prime_tables.h
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-
-// This provides interface PrimeTable that determines whether a number is a
-// prime and determines a next prime number. This interface is used
-// in Google Test samples demonstrating use of parameterized tests.
-
-#ifndef GOOGLETEST_SAMPLES_PRIME_TABLES_H_
-#define GOOGLETEST_SAMPLES_PRIME_TABLES_H_
-
-#include <algorithm>
-
-// The prime table interface.
-class PrimeTable {
- public:
-  virtual ~PrimeTable() {}
-
-  // Returns true if and only if n is a prime number.
-  virtual bool IsPrime(int n) const = 0;
-
-  // Returns the smallest prime number greater than p; or returns -1
-  // if the next prime is beyond the capacity of the table.
-  virtual int GetNextPrime(int p) const = 0;
-};
-
-// Implementation #1 calculates the primes on-the-fly.
-class OnTheFlyPrimeTable : public PrimeTable {
- public:
-  bool IsPrime(int n) const override {
-    if (n <= 1) return false;
-
-    for (int i = 2; i*i <= n; i++) {
-      // n is divisible by an integer other than 1 and itself.
-      if ((n % i) == 0) return false;
-    }
-
-    return true;
-  }
-
-  int GetNextPrime(int p) const override {
-    if (p < 0) return -1;
-
-    for (int n = p + 1;; n++) {
-      if (IsPrime(n)) return n;
-    }
-  }
-};
-
-// Implementation #2 pre-calculates the primes and stores the result
-// in an array.
-class PreCalculatedPrimeTable : public PrimeTable {
- public:
-  // 'max' specifies the maximum number the prime table holds.
-  explicit PreCalculatedPrimeTable(int max)
-      : is_prime_size_(max + 1), is_prime_(new bool[max + 1]) {
-    CalculatePrimesUpTo(max);
-  }
-  ~PreCalculatedPrimeTable() override { delete[] is_prime_; }
-
-  bool IsPrime(int n) const override {
-    return 0 <= n && n < is_prime_size_ && is_prime_[n];
-  }
-
-  int GetNextPrime(int p) const override {
-    for (int n = p + 1; n < is_prime_size_; n++) {
-      if (is_prime_[n]) return n;
-    }
-
-    return -1;
-  }
-
- private:
-  void CalculatePrimesUpTo(int max) {
-    ::std::fill(is_prime_, is_prime_ + is_prime_size_, true);
-    is_prime_[0] = is_prime_[1] = false;
-
-    // Checks every candidate for prime number (we know that 2 is the only even
-    // prime).
-    for (int i = 2; i*i <= max; i += i%2+1) {
-      if (!is_prime_[i]) continue;
-
-      // Marks all multiples of i (except i itself) as non-prime.
-      // We are starting here from i-th multiplier, because all smaller
-      // complex numbers were already marked.
-      for (int j = i*i; j <= max; j += i) {
-        is_prime_[j] = false;
-      }
-    }
-  }
-
-  const int is_prime_size_;
-  bool* const is_prime_;
-
-  // Disables compiler warning "assignment operator could not be generated."
-  void operator=(const PreCalculatedPrimeTable& rhs);
-};
-
-#endif  // GOOGLETEST_SAMPLES_PRIME_TABLES_H_
diff --git a/third_party/googletest/googletest/samples/sample1.cc b/third_party/googletest/googletest/samples/sample1.cc
deleted file mode 100644
index 1d42759..0000000
--- a/third_party/googletest/googletest/samples/sample1.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include "sample1.h"
-
-// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
-int Factorial(int n) {
-  int result = 1;
-  for (int i = 1; i <= n; i++) {
-    result *= i;
-  }
-
-  return result;
-}
-
-// Returns true if and only if n is a prime number.
-bool IsPrime(int n) {
-  // Trivial case 1: small numbers
-  if (n <= 1) return false;
-
-  // Trivial case 2: even numbers
-  if (n % 2 == 0) return n == 2;
-
-  // Now, we have that n is odd and n >= 3.
-
-  // Try to divide n by every odd number i, starting from 3
-  for (int i = 3; ; i += 2) {
-    // We only have to try i up to the square root of n
-    if (i > n/i) break;
-
-    // Now, we have i <= n/i < n.
-    // If n is divisible by i, n is not prime.
-    if (n % i == 0) return false;
-  }
-
-  // n has no integer factor in the range (1, n), and thus is prime.
-  return true;
-}
diff --git a/third_party/googletest/googletest/samples/sample1.h b/third_party/googletest/googletest/samples/sample1.h
deleted file mode 100644
index ba392cf..0000000
--- a/third_party/googletest/googletest/samples/sample1.h
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GOOGLETEST_SAMPLES_SAMPLE1_H_
-#define GOOGLETEST_SAMPLES_SAMPLE1_H_
-
-// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
-int Factorial(int n);
-
-// Returns true if and only if n is a prime number.
-bool IsPrime(int n);
-
-#endif  // GOOGLETEST_SAMPLES_SAMPLE1_H_
diff --git a/third_party/googletest/googletest/samples/sample10_unittest.cc b/third_party/googletest/googletest/samples/sample10_unittest.cc
deleted file mode 100644
index 36cdac2..0000000
--- a/third_party/googletest/googletest/samples/sample10_unittest.cc
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2009 Google Inc. All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to use Google Test listener API to implement
-// a primitive leak checker.
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "gtest/gtest.h"
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-
-namespace {
-// We will track memory used by this class.
-class Water {
- public:
-  // Normal Water declarations go here.
-
-  // operator new and operator delete help us control water allocation.
-  void* operator new(size_t allocation_size) {
-    allocated_++;
-    return malloc(allocation_size);
-  }
-
-  void operator delete(void* block, size_t /* allocation_size */) {
-    allocated_--;
-    free(block);
-  }
-
-  static int allocated() { return allocated_; }
-
- private:
-  static int allocated_;
-};
-
-int Water::allocated_ = 0;
-
-// This event listener monitors how many Water objects are created and
-// destroyed by each test, and reports a failure if a test leaks some Water
-// objects. It does this by comparing the number of live Water objects at
-// the beginning of a test and at the end of a test.
-class LeakChecker : public EmptyTestEventListener {
- private:
-  // Called before a test starts.
-  void OnTestStart(const TestInfo& /* test_info */) override {
-    initially_allocated_ = Water::allocated();
-  }
-
-  // Called after a test ends.
-  void OnTestEnd(const TestInfo& /* test_info */) override {
-    int difference = Water::allocated() - initially_allocated_;
-
-    // You can generate a failure in any event handler except
-    // OnTestPartResult. Just use an appropriate Google Test assertion to do
-    // it.
-    EXPECT_LE(difference, 0) << "Leaked " << difference << " unit(s) of Water!";
-  }
-
-  int initially_allocated_;
-};
-
-TEST(ListenersTest, DoesNotLeak) {
-  Water* water = new Water;
-  delete water;
-}
-
-// This should fail when the --check_for_leaks command line flag is
-// specified.
-TEST(ListenersTest, LeaksWater) {
-  Water* water = new Water;
-  EXPECT_TRUE(water != nullptr);
-}
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  bool check_for_leaks = false;
-  if (argc > 1 && strcmp(argv[1], "--check_for_leaks") == 0 )
-    check_for_leaks = true;
-  else
-    printf("%s\n", "Run this program with --check_for_leaks to enable "
-           "custom leak checking in the tests.");
-
-  // If we are given the --check_for_leaks command line flag, installs the
-  // leak checker.
-  if (check_for_leaks) {
-    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-
-    // Adds the leak checker to the end of the test event listener list,
-    // after the default text output printer and the default XML report
-    // generator.
-    //
-    // The order is important - it ensures that failures generated in the
-    // leak checker's OnTestEnd() method are processed by the text and XML
-    // printers *before* their OnTestEnd() methods are called, such that
-    // they are attributed to the right test. Remember that a listener
-    // receives an OnXyzStart event *after* listeners preceding it in the
-    // list received that event, and receives an OnXyzEnd event *before*
-    // listeners preceding it.
-    //
-    // We don't need to worry about deleting the new listener later, as
-    // Google Test will do it.
-    listeners.Append(new LeakChecker);
-  }
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/samples/sample1_unittest.cc b/third_party/googletest/googletest/samples/sample1_unittest.cc
deleted file mode 100644
index cb08b61..0000000
--- a/third_party/googletest/googletest/samples/sample1_unittest.cc
+++ /dev/null
@@ -1,151 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// This sample shows how to write a simple unit test for a function,
-// using Google C++ testing framework.
-//
-// Writing a unit test using Google C++ testing framework is easy as 1-2-3:
-
-
-// Step 1. Include necessary header files such that the stuff your
-// test logic needs is declared.
-//
-// Don't forget gtest.h, which declares the testing framework.
-
-#include <limits.h>
-#include "sample1.h"
-#include "gtest/gtest.h"
-namespace {
-
-// Step 2. Use the TEST macro to define your tests.
-//
-// TEST has two parameters: the test case name and the test name.
-// After using the macro, you should define your test logic between a
-// pair of braces.  You can use a bunch of macros to indicate the
-// success or failure of a test.  EXPECT_TRUE and EXPECT_EQ are
-// examples of such macros.  For a complete list, see gtest.h.
-//
-// <TechnicalDetails>
-//
-// In Google Test, tests are grouped into test cases.  This is how we
-// keep test code organized.  You should put logically related tests
-// into the same test case.
-//
-// The test case name and the test name should both be valid C++
-// identifiers.  And you should not use underscore (_) in the names.
-//
-// Google Test guarantees that each test you define is run exactly
-// once, but it makes no guarantee on the order the tests are
-// executed.  Therefore, you should write your tests in such a way
-// that their results don't depend on their order.
-//
-// </TechnicalDetails>
-
-
-// Tests Factorial().
-
-// Tests factorial of negative numbers.
-TEST(FactorialTest, Negative) {
-  // This test is named "Negative", and belongs to the "FactorialTest"
-  // test case.
-  EXPECT_EQ(1, Factorial(-5));
-  EXPECT_EQ(1, Factorial(-1));
-  EXPECT_GT(Factorial(-10), 0);
-
-  // <TechnicalDetails>
-  //
-  // EXPECT_EQ(expected, actual) is the same as
-  //
-  //   EXPECT_TRUE((expected) == (actual))
-  //
-  // except that it will print both the expected value and the actual
-  // value when the assertion fails.  This is very helpful for
-  // debugging.  Therefore in this case EXPECT_EQ is preferred.
-  //
-  // On the other hand, EXPECT_TRUE accepts any Boolean expression,
-  // and is thus more general.
-  //
-  // </TechnicalDetails>
-}
-
-// Tests factorial of 0.
-TEST(FactorialTest, Zero) {
-  EXPECT_EQ(1, Factorial(0));
-}
-
-// Tests factorial of positive numbers.
-TEST(FactorialTest, Positive) {
-  EXPECT_EQ(1, Factorial(1));
-  EXPECT_EQ(2, Factorial(2));
-  EXPECT_EQ(6, Factorial(3));
-  EXPECT_EQ(40320, Factorial(8));
-}
-
-
-// Tests IsPrime()
-
-// Tests negative input.
-TEST(IsPrimeTest, Negative) {
-  // This test belongs to the IsPrimeTest test case.
-
-  EXPECT_FALSE(IsPrime(-1));
-  EXPECT_FALSE(IsPrime(-2));
-  EXPECT_FALSE(IsPrime(INT_MIN));
-}
-
-// Tests some trivial cases.
-TEST(IsPrimeTest, Trivial) {
-  EXPECT_FALSE(IsPrime(0));
-  EXPECT_FALSE(IsPrime(1));
-  EXPECT_TRUE(IsPrime(2));
-  EXPECT_TRUE(IsPrime(3));
-}
-
-// Tests positive input.
-TEST(IsPrimeTest, Positive) {
-  EXPECT_FALSE(IsPrime(4));
-  EXPECT_TRUE(IsPrime(5));
-  EXPECT_FALSE(IsPrime(6));
-  EXPECT_TRUE(IsPrime(23));
-}
-}  // namespace
-
-// Step 3. Call RUN_ALL_TESTS() in main().
-//
-// We do this by linking in src/gtest_main.cc file, which consists of
-// a main() function which calls RUN_ALL_TESTS() for us.
-//
-// This runs all the tests you've defined, prints the result, and
-// returns 0 if successful, or 1 otherwise.
-//
-// Did you notice that we didn't register the tests?  The
-// RUN_ALL_TESTS() macro magically knows about all the tests we
-// defined.  Isn't this convenient?
diff --git a/third_party/googletest/googletest/samples/sample2.cc b/third_party/googletest/googletest/samples/sample2.cc
deleted file mode 100644
index d8e8723..0000000
--- a/third_party/googletest/googletest/samples/sample2.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include "sample2.h"
-
-#include <string.h>
-
-// Clones a 0-terminated C string, allocating memory using new.
-const char* MyString::CloneCString(const char* a_c_string) {
-  if (a_c_string == nullptr) return nullptr;
-
-  const size_t len = strlen(a_c_string);
-  char* const clone = new char[ len + 1 ];
-  memcpy(clone, a_c_string, len + 1);
-
-  return clone;
-}
-
-// Sets the 0-terminated C string this MyString object
-// represents.
-void MyString::Set(const char* a_c_string) {
-  // Makes sure this works when c_string == c_string_
-  const char* const temp = MyString::CloneCString(a_c_string);
-  delete[] c_string_;
-  c_string_ = temp;
-}
diff --git a/third_party/googletest/googletest/samples/sample2.h b/third_party/googletest/googletest/samples/sample2.h
deleted file mode 100644
index 0f98689..0000000
--- a/third_party/googletest/googletest/samples/sample2.h
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GOOGLETEST_SAMPLES_SAMPLE2_H_
-#define GOOGLETEST_SAMPLES_SAMPLE2_H_
-
-#include <string.h>
-
-
-// A simple string class.
-class MyString {
- private:
-  const char* c_string_;
-  const MyString& operator=(const MyString& rhs);
-
- public:
-  // Clones a 0-terminated C string, allocating memory using new.
-  static const char* CloneCString(const char* a_c_string);
-
-  ////////////////////////////////////////////////////////////
-  //
-  // C'tors
-
-  // The default c'tor constructs a NULL string.
-  MyString() : c_string_(nullptr) {}
-
-  // Constructs a MyString by cloning a 0-terminated C string.
-  explicit MyString(const char* a_c_string) : c_string_(nullptr) {
-    Set(a_c_string);
-  }
-
-  // Copy c'tor
-  MyString(const MyString& string) : c_string_(nullptr) {
-    Set(string.c_string_);
-  }
-
-  ////////////////////////////////////////////////////////////
-  //
-  // D'tor.  MyString is intended to be a final class, so the d'tor
-  // doesn't need to be virtual.
-  ~MyString() { delete[] c_string_; }
-
-  // Gets the 0-terminated C string this MyString object represents.
-  const char* c_string() const { return c_string_; }
-
-  size_t Length() const { return c_string_ == nullptr ? 0 : strlen(c_string_); }
-
-  // Sets the 0-terminated C string this MyString object represents.
-  void Set(const char* c_string);
-};
-
-#endif  // GOOGLETEST_SAMPLES_SAMPLE2_H_
diff --git a/third_party/googletest/googletest/samples/sample2_unittest.cc b/third_party/googletest/googletest/samples/sample2_unittest.cc
deleted file mode 100644
index 41e31c1..0000000
--- a/third_party/googletest/googletest/samples/sample2_unittest.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// This sample shows how to write a more complex unit test for a class
-// that has multiple member functions.
-//
-// Usually, it's a good idea to have one test for each method in your
-// class.  You don't have to do that exactly, but it helps to keep
-// your tests organized.  You may also throw in additional tests as
-// needed.
-
-#include "sample2.h"
-#include "gtest/gtest.h"
-namespace {
-// In this example, we test the MyString class (a simple string).
-
-// Tests the default c'tor.
-TEST(MyString, DefaultConstructor) {
-  const MyString s;
-
-  // Asserts that s.c_string() returns NULL.
-  //
-  // <TechnicalDetails>
-  //
-  // If we write NULL instead of
-  //
-  //   static_cast<const char *>(NULL)
-  //
-  // in this assertion, it will generate a warning on gcc 3.4.  The
-  // reason is that EXPECT_EQ needs to know the types of its
-  // arguments in order to print them when it fails.  Since NULL is
-  // #defined as 0, the compiler will use the formatter function for
-  // int to print it.  However, gcc thinks that NULL should be used as
-  // a pointer, not an int, and therefore complains.
-  //
-  // The root of the problem is C++'s lack of distinction between the
-  // integer number 0 and the null pointer constant.  Unfortunately,
-  // we have to live with this fact.
-  //
-  // </TechnicalDetails>
-  EXPECT_STREQ(nullptr, s.c_string());
-
-  EXPECT_EQ(0u, s.Length());
-}
-
-const char kHelloString[] = "Hello, world!";
-
-// Tests the c'tor that accepts a C string.
-TEST(MyString, ConstructorFromCString) {
-  const MyString s(kHelloString);
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-  EXPECT_EQ(sizeof(kHelloString)/sizeof(kHelloString[0]) - 1,
-            s.Length());
-}
-
-// Tests the copy c'tor.
-TEST(MyString, CopyConstructor) {
-  const MyString s1(kHelloString);
-  const MyString s2 = s1;
-  EXPECT_EQ(0, strcmp(s2.c_string(), kHelloString));
-}
-
-// Tests the Set method.
-TEST(MyString, Set) {
-  MyString s;
-
-  s.Set(kHelloString);
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-
-  // Set should work when the input pointer is the same as the one
-  // already in the MyString object.
-  s.Set(s.c_string());
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-
-  // Can we set the MyString to NULL?
-  s.Set(nullptr);
-  EXPECT_STREQ(nullptr, s.c_string());
-}
-}  // namespace
diff --git a/third_party/googletest/googletest/samples/sample3-inl.h b/third_party/googletest/googletest/samples/sample3-inl.h
deleted file mode 100644
index 659e0f0..0000000
--- a/third_party/googletest/googletest/samples/sample3-inl.h
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GOOGLETEST_SAMPLES_SAMPLE3_INL_H_
-#define GOOGLETEST_SAMPLES_SAMPLE3_INL_H_
-
-#include <stddef.h>
-
-
-// Queue is a simple queue implemented as a singled-linked list.
-//
-// The element type must support copy constructor.
-template <typename E>  // E is the element type
-class Queue;
-
-// QueueNode is a node in a Queue, which consists of an element of
-// type E and a pointer to the next node.
-template <typename E>  // E is the element type
-class QueueNode {
-  friend class Queue<E>;
-
- public:
-  // Gets the element in this node.
-  const E& element() const { return element_; }
-
-  // Gets the next node in the queue.
-  QueueNode* next() { return next_; }
-  const QueueNode* next() const { return next_; }
-
- private:
-  // Creates a node with a given element value.  The next pointer is
-  // set to NULL.
-  explicit QueueNode(const E& an_element)
-      : element_(an_element), next_(nullptr) {}
-
-  // We disable the default assignment operator and copy c'tor.
-  const QueueNode& operator = (const QueueNode&);
-  QueueNode(const QueueNode&);
-
-  E element_;
-  QueueNode* next_;
-};
-
-template <typename E>  // E is the element type.
-class Queue {
- public:
-  // Creates an empty queue.
-  Queue() : head_(nullptr), last_(nullptr), size_(0) {}
-
-  // D'tor.  Clears the queue.
-  ~Queue() { Clear(); }
-
-  // Clears the queue.
-  void Clear() {
-    if (size_ > 0) {
-      // 1. Deletes every node.
-      QueueNode<E>* node = head_;
-      QueueNode<E>* next = node->next();
-      for (; ;) {
-        delete node;
-        node = next;
-        if (node == nullptr) break;
-        next = node->next();
-      }
-
-      // 2. Resets the member variables.
-      head_ = last_ = nullptr;
-      size_ = 0;
-    }
-  }
-
-  // Gets the number of elements.
-  size_t Size() const { return size_; }
-
-  // Gets the first element of the queue, or NULL if the queue is empty.
-  QueueNode<E>* Head() { return head_; }
-  const QueueNode<E>* Head() const { return head_; }
-
-  // Gets the last element of the queue, or NULL if the queue is empty.
-  QueueNode<E>* Last() { return last_; }
-  const QueueNode<E>* Last() const { return last_; }
-
-  // Adds an element to the end of the queue.  A copy of the element is
-  // created using the copy constructor, and then stored in the queue.
-  // Changes made to the element in the queue doesn't affect the source
-  // object, and vice versa.
-  void Enqueue(const E& element) {
-    QueueNode<E>* new_node = new QueueNode<E>(element);
-
-    if (size_ == 0) {
-      head_ = last_ = new_node;
-      size_ = 1;
-    } else {
-      last_->next_ = new_node;
-      last_ = new_node;
-      size_++;
-    }
-  }
-
-  // Removes the head of the queue and returns it.  Returns NULL if
-  // the queue is empty.
-  E* Dequeue() {
-    if (size_ == 0) {
-      return nullptr;
-    }
-
-    const QueueNode<E>* const old_head = head_;
-    head_ = head_->next_;
-    size_--;
-    if (size_ == 0) {
-      last_ = nullptr;
-    }
-
-    E* element = new E(old_head->element());
-    delete old_head;
-
-    return element;
-  }
-
-  // Applies a function/functor on each element of the queue, and
-  // returns the result in a new queue.  The original queue is not
-  // affected.
-  template <typename F>
-  Queue* Map(F function) const {
-    Queue* new_queue = new Queue();
-    for (const QueueNode<E>* node = head_; node != nullptr;
-         node = node->next_) {
-      new_queue->Enqueue(function(node->element()));
-    }
-
-    return new_queue;
-  }
-
- private:
-  QueueNode<E>* head_;  // The first node of the queue.
-  QueueNode<E>* last_;  // The last node of the queue.
-  size_t size_;  // The number of elements in the queue.
-
-  // We disallow copying a queue.
-  Queue(const Queue&);
-  const Queue& operator = (const Queue&);
-};
-
-#endif  // GOOGLETEST_SAMPLES_SAMPLE3_INL_H_
diff --git a/third_party/googletest/googletest/samples/sample3_unittest.cc b/third_party/googletest/googletest/samples/sample3_unittest.cc
deleted file mode 100644
index b19416d..0000000
--- a/third_party/googletest/googletest/samples/sample3_unittest.cc
+++ /dev/null
@@ -1,149 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// In this example, we use a more advanced feature of Google Test called
-// test fixture.
-//
-// A test fixture is a place to hold objects and functions shared by
-// all tests in a test case.  Using a test fixture avoids duplicating
-// the test code necessary to initialize and cleanup those common
-// objects for each test.  It is also useful for defining sub-routines
-// that your tests need to invoke a lot.
-//
-// <TechnicalDetails>
-//
-// The tests share the test fixture in the sense of code sharing, not
-// data sharing.  Each test is given its own fresh copy of the
-// fixture.  You cannot expect the data modified by one test to be
-// passed on to another test, which is a bad idea.
-//
-// The reason for this design is that tests should be independent and
-// repeatable.  In particular, a test should not fail as the result of
-// another test's failure.  If one test depends on info produced by
-// another test, then the two tests should really be one big test.
-//
-// The macros for indicating the success/failure of a test
-// (EXPECT_TRUE, FAIL, etc) need to know what the current test is
-// (when Google Test prints the test result, it tells you which test
-// each failure belongs to).  Technically, these macros invoke a
-// member function of the Test class.  Therefore, you cannot use them
-// in a global function.  That's why you should put test sub-routines
-// in a test fixture.
-//
-// </TechnicalDetails>
-
-#include "sample3-inl.h"
-#include "gtest/gtest.h"
-namespace {
-// To use a test fixture, derive a class from testing::Test.
-class QueueTestSmpl3 : public testing::Test {
- protected:  // You should make the members protected s.t. they can be
-             // accessed from sub-classes.
-
-  // virtual void SetUp() will be called before each test is run.  You
-  // should define it if you need to initialize the variables.
-  // Otherwise, this can be skipped.
-  void SetUp() override {
-    q1_.Enqueue(1);
-    q2_.Enqueue(2);
-    q2_.Enqueue(3);
-  }
-
-  // virtual void TearDown() will be called after each test is run.
-  // You should define it if there is cleanup work to do.  Otherwise,
-  // you don't have to provide it.
-  //
-  // virtual void TearDown() {
-  // }
-
-  // A helper function that some test uses.
-  static int Double(int n) {
-    return 2*n;
-  }
-
-  // A helper function for testing Queue::Map().
-  void MapTester(const Queue<int> * q) {
-    // Creates a new queue, where each element is twice as big as the
-    // corresponding one in q.
-    const Queue<int> * const new_q = q->Map(Double);
-
-    // Verifies that the new queue has the same size as q.
-    ASSERT_EQ(q->Size(), new_q->Size());
-
-    // Verifies the relationship between the elements of the two queues.
-    for (const QueueNode<int>*n1 = q->Head(), *n2 = new_q->Head();
-         n1 != nullptr; n1 = n1->next(), n2 = n2->next()) {
-      EXPECT_EQ(2 * n1->element(), n2->element());
-    }
-
-    delete new_q;
-  }
-
-  // Declares the variables your tests want to use.
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-
-// When you have a test fixture, you define a test using TEST_F
-// instead of TEST.
-
-// Tests the default c'tor.
-TEST_F(QueueTestSmpl3, DefaultConstructor) {
-  // You can access data in the test fixture here.
-  EXPECT_EQ(0u, q0_.Size());
-}
-
-// Tests Dequeue().
-TEST_F(QueueTestSmpl3, Dequeue) {
-  int * n = q0_.Dequeue();
-  EXPECT_TRUE(n == nullptr);
-
-  n = q1_.Dequeue();
-  ASSERT_TRUE(n != nullptr);
-  EXPECT_EQ(1, *n);
-  EXPECT_EQ(0u, q1_.Size());
-  delete n;
-
-  n = q2_.Dequeue();
-  ASSERT_TRUE(n != nullptr);
-  EXPECT_EQ(2, *n);
-  EXPECT_EQ(1u, q2_.Size());
-  delete n;
-}
-
-// Tests the Queue::Map() function.
-TEST_F(QueueTestSmpl3, Map) {
-  MapTester(&q0_);
-  MapTester(&q1_);
-  MapTester(&q2_);
-}
-}  // namespace
diff --git a/third_party/googletest/googletest/samples/sample4.cc b/third_party/googletest/googletest/samples/sample4.cc
deleted file mode 100644
index b0ee609..0000000
--- a/third_party/googletest/googletest/samples/sample4.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include <stdio.h>
-
-#include "sample4.h"
-
-// Returns the current counter value, and increments it.
-int Counter::Increment() {
-  return counter_++;
-}
-
-// Returns the current counter value, and decrements it.
-// counter can not be less than 0, return 0 in this case
-int Counter::Decrement() {
-  if (counter_ == 0) {
-    return counter_;
-  } else  {
-    return counter_--;
-  }
-}
-
-// Prints the current counter value to STDOUT.
-void Counter::Print() const {
-  printf("%d", counter_);
-}
diff --git a/third_party/googletest/googletest/samples/sample4.h b/third_party/googletest/googletest/samples/sample4.h
deleted file mode 100644
index 0c4ed92..0000000
--- a/third_party/googletest/googletest/samples/sample4.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-#ifndef GOOGLETEST_SAMPLES_SAMPLE4_H_
-#define GOOGLETEST_SAMPLES_SAMPLE4_H_
-
-// A simple monotonic counter.
-class Counter {
- private:
-  int counter_;
-
- public:
-  // Creates a counter that starts at 0.
-  Counter() : counter_(0) {}
-
-  // Returns the current counter value, and increments it.
-  int Increment();
-
-  // Returns the current counter value, and decrements it.
-  int Decrement();
-
-  // Prints the current counter value to STDOUT.
-  void Print() const;
-};
-
-#endif  // GOOGLETEST_SAMPLES_SAMPLE4_H_
diff --git a/third_party/googletest/googletest/samples/sample4_unittest.cc b/third_party/googletest/googletest/samples/sample4_unittest.cc
deleted file mode 100644
index d5144c0..0000000
--- a/third_party/googletest/googletest/samples/sample4_unittest.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "sample4.h"
-#include "gtest/gtest.h"
-
-namespace {
-// Tests the Increment() method.
-
-TEST(Counter, Increment) {
-  Counter c;
-
-  // Test that counter 0 returns 0
-  EXPECT_EQ(0, c.Decrement());
-
-  // EXPECT_EQ() evaluates its arguments exactly once, so they
-  // can have side effects.
-
-  EXPECT_EQ(0, c.Increment());
-  EXPECT_EQ(1, c.Increment());
-  EXPECT_EQ(2, c.Increment());
-
-  EXPECT_EQ(3, c.Decrement());
-}
-
-}  // namespace
diff --git a/third_party/googletest/googletest/samples/sample5_unittest.cc b/third_party/googletest/googletest/samples/sample5_unittest.cc
deleted file mode 100644
index 0a21dd2..0000000
--- a/third_party/googletest/googletest/samples/sample5_unittest.cc
+++ /dev/null
@@ -1,196 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample teaches how to reuse a test fixture in multiple test
-// cases by deriving sub-fixtures from it.
-//
-// When you define a test fixture, you specify the name of the test
-// case that will use this fixture.  Therefore, a test fixture can
-// be used by only one test case.
-//
-// Sometimes, more than one test cases may want to use the same or
-// slightly different test fixtures.  For example, you may want to
-// make sure that all tests for a GUI library don't leak important
-// system resources like fonts and brushes.  In Google Test, you do
-// this by putting the shared logic in a super (as in "super class")
-// test fixture, and then have each test case use a fixture derived
-// from this super fixture.
-
-#include <limits.h>
-#include <time.h>
-#include "gtest/gtest.h"
-#include "sample1.h"
-#include "sample3-inl.h"
-namespace {
-// In this sample, we want to ensure that every test finishes within
-// ~5 seconds.  If a test takes longer to run, we consider it a
-// failure.
-//
-// We put the code for timing a test in a test fixture called
-// "QuickTest".  QuickTest is intended to be the super fixture that
-// other fixtures derive from, therefore there is no test case with
-// the name "QuickTest".  This is OK.
-//
-// Later, we will derive multiple test fixtures from QuickTest.
-class QuickTest : public testing::Test {
- protected:
-  // Remember that SetUp() is run immediately before a test starts.
-  // This is a good place to record the start time.
-  void SetUp() override { start_time_ = time(nullptr); }
-
-  // TearDown() is invoked immediately after a test finishes.  Here we
-  // check if the test was too slow.
-  void TearDown() override {
-    // Gets the time when the test finishes
-    const time_t end_time = time(nullptr);
-
-    // Asserts that the test took no more than ~5 seconds.  Did you
-    // know that you can use assertions in SetUp() and TearDown() as
-    // well?
-    EXPECT_TRUE(end_time - start_time_ <= 5) << "The test took too long.";
-  }
-
-  // The UTC time (in seconds) when the test starts
-  time_t start_time_;
-};
-
-
-// We derive a fixture named IntegerFunctionTest from the QuickTest
-// fixture.  All tests using this fixture will be automatically
-// required to be quick.
-class IntegerFunctionTest : public QuickTest {
-  // We don't need any more logic than already in the QuickTest fixture.
-  // Therefore the body is empty.
-};
-
-
-// Now we can write tests in the IntegerFunctionTest test case.
-
-// Tests Factorial()
-TEST_F(IntegerFunctionTest, Factorial) {
-  // Tests factorial of negative numbers.
-  EXPECT_EQ(1, Factorial(-5));
-  EXPECT_EQ(1, Factorial(-1));
-  EXPECT_GT(Factorial(-10), 0);
-
-  // Tests factorial of 0.
-  EXPECT_EQ(1, Factorial(0));
-
-  // Tests factorial of positive numbers.
-  EXPECT_EQ(1, Factorial(1));
-  EXPECT_EQ(2, Factorial(2));
-  EXPECT_EQ(6, Factorial(3));
-  EXPECT_EQ(40320, Factorial(8));
-}
-
-
-// Tests IsPrime()
-TEST_F(IntegerFunctionTest, IsPrime) {
-  // Tests negative input.
-  EXPECT_FALSE(IsPrime(-1));
-  EXPECT_FALSE(IsPrime(-2));
-  EXPECT_FALSE(IsPrime(INT_MIN));
-
-  // Tests some trivial cases.
-  EXPECT_FALSE(IsPrime(0));
-  EXPECT_FALSE(IsPrime(1));
-  EXPECT_TRUE(IsPrime(2));
-  EXPECT_TRUE(IsPrime(3));
-
-  // Tests positive input.
-  EXPECT_FALSE(IsPrime(4));
-  EXPECT_TRUE(IsPrime(5));
-  EXPECT_FALSE(IsPrime(6));
-  EXPECT_TRUE(IsPrime(23));
-}
-
-
-// The next test case (named "QueueTest") also needs to be quick, so
-// we derive another fixture from QuickTest.
-//
-// The QueueTest test fixture has some logic and shared objects in
-// addition to what's in QuickTest already.  We define the additional
-// stuff inside the body of the test fixture, as usual.
-class QueueTest : public QuickTest {
- protected:
-  void SetUp() override {
-    // First, we need to set up the super fixture (QuickTest).
-    QuickTest::SetUp();
-
-    // Second, some additional setup for this fixture.
-    q1_.Enqueue(1);
-    q2_.Enqueue(2);
-    q2_.Enqueue(3);
-  }
-
-  // By default, TearDown() inherits the behavior of
-  // QuickTest::TearDown().  As we have no additional cleaning work
-  // for QueueTest, we omit it here.
-  //
-  // virtual void TearDown() {
-  //   QuickTest::TearDown();
-  // }
-
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-
-
-// Now, let's write tests using the QueueTest fixture.
-
-// Tests the default constructor.
-TEST_F(QueueTest, DefaultConstructor) {
-  EXPECT_EQ(0u, q0_.Size());
-}
-
-// Tests Dequeue().
-TEST_F(QueueTest, Dequeue) {
-  int* n = q0_.Dequeue();
-  EXPECT_TRUE(n == nullptr);
-
-  n = q1_.Dequeue();
-  EXPECT_TRUE(n != nullptr);
-  EXPECT_EQ(1, *n);
-  EXPECT_EQ(0u, q1_.Size());
-  delete n;
-
-  n = q2_.Dequeue();
-  EXPECT_TRUE(n != nullptr);
-  EXPECT_EQ(2, *n);
-  EXPECT_EQ(1u, q2_.Size());
-  delete n;
-}
-}  // namespace
-// If necessary, you can derive further test fixtures from a derived
-// fixture itself.  For example, you can derive another fixture from
-// QueueTest.  Google Test imposes no limit on how deep the hierarchy
-// can be.  In practice, however, you probably don't want it to be too
-// deep as to be confusing.
diff --git a/third_party/googletest/googletest/samples/sample6_unittest.cc b/third_party/googletest/googletest/samples/sample6_unittest.cc
deleted file mode 100644
index da317ee..0000000
--- a/third_party/googletest/googletest/samples/sample6_unittest.cc
+++ /dev/null
@@ -1,217 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test common properties of multiple
-// implementations of the same interface (aka interface tests).
-
-// The interface and its implementations are in this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-// First, we define some factory functions for creating instances of
-// the implementations.  You may be able to skip this step if all your
-// implementations can be constructed the same way.
-
-template <class T>
-PrimeTable* CreatePrimeTable();
-
-template <>
-PrimeTable* CreatePrimeTable<OnTheFlyPrimeTable>() {
-  return new OnTheFlyPrimeTable;
-}
-
-template <>
-PrimeTable* CreatePrimeTable<PreCalculatedPrimeTable>() {
-  return new PreCalculatedPrimeTable(10000);
-}
-
-// Then we define a test fixture class template.
-template <class T>
-class PrimeTableTest : public testing::Test {
- protected:
-  // The ctor calls the factory function to create a prime table
-  // implemented by T.
-  PrimeTableTest() : table_(CreatePrimeTable<T>()) {}
-
-  ~PrimeTableTest() override { delete table_; }
-
-  // Note that we test an implementation via the base interface
-  // instead of the actual implementation class.  This is important
-  // for keeping the tests close to the real world scenario, where the
-  // implementation is invoked via the base interface.  It avoids
-  // got-yas where the implementation class has a method that shadows
-  // a method with the same name (but slightly different argument
-  // types) in the base interface, for example.
-  PrimeTable* const table_;
-};
-
-using testing::Types;
-
-// Google Test offers two ways for reusing tests for different types.
-// The first is called "typed tests".  You should use it if you
-// already know *all* the types you are gonna exercise when you write
-// the tests.
-
-// To write a typed test case, first use
-//
-//   TYPED_TEST_SUITE(TestCaseName, TypeList);
-//
-// to declare it and specify the type parameters.  As with TEST_F,
-// TestCaseName must match the test fixture name.
-
-// The list of types we want to test.
-typedef Types<OnTheFlyPrimeTable, PreCalculatedPrimeTable> Implementations;
-
-TYPED_TEST_SUITE(PrimeTableTest, Implementations);
-
-// Then use TYPED_TEST(TestCaseName, TestName) to define a typed test,
-// similar to TEST_F.
-TYPED_TEST(PrimeTableTest, ReturnsFalseForNonPrimes) {
-  // Inside the test body, you can refer to the type parameter by
-  // TypeParam, and refer to the fixture class by TestFixture.  We
-  // don't need them in this example.
-
-  // Since we are in the template world, C++ requires explicitly
-  // writing 'this->' when referring to members of the fixture class.
-  // This is something you have to learn to live with.
-  EXPECT_FALSE(this->table_->IsPrime(-5));
-  EXPECT_FALSE(this->table_->IsPrime(0));
-  EXPECT_FALSE(this->table_->IsPrime(1));
-  EXPECT_FALSE(this->table_->IsPrime(4));
-  EXPECT_FALSE(this->table_->IsPrime(6));
-  EXPECT_FALSE(this->table_->IsPrime(100));
-}
-
-TYPED_TEST(PrimeTableTest, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(this->table_->IsPrime(2));
-  EXPECT_TRUE(this->table_->IsPrime(3));
-  EXPECT_TRUE(this->table_->IsPrime(5));
-  EXPECT_TRUE(this->table_->IsPrime(7));
-  EXPECT_TRUE(this->table_->IsPrime(11));
-  EXPECT_TRUE(this->table_->IsPrime(131));
-}
-
-TYPED_TEST(PrimeTableTest, CanGetNextPrime) {
-  EXPECT_EQ(2, this->table_->GetNextPrime(0));
-  EXPECT_EQ(3, this->table_->GetNextPrime(2));
-  EXPECT_EQ(5, this->table_->GetNextPrime(3));
-  EXPECT_EQ(7, this->table_->GetNextPrime(5));
-  EXPECT_EQ(11, this->table_->GetNextPrime(7));
-  EXPECT_EQ(131, this->table_->GetNextPrime(128));
-}
-
-// That's it!  Google Test will repeat each TYPED_TEST for each type
-// in the type list specified in TYPED_TEST_SUITE.  Sit back and be
-// happy that you don't have to define them multiple times.
-
-using testing::Types;
-
-// Sometimes, however, you don't yet know all the types that you want
-// to test when you write the tests.  For example, if you are the
-// author of an interface and expect other people to implement it, you
-// might want to write a set of tests to make sure each implementation
-// conforms to some basic requirements, but you don't know what
-// implementations will be written in the future.
-//
-// How can you write the tests without committing to the type
-// parameters?  That's what "type-parameterized tests" can do for you.
-// It is a bit more involved than typed tests, but in return you get a
-// test pattern that can be reused in many contexts, which is a big
-// win.  Here's how you do it:
-
-// First, define a test fixture class template.  Here we just reuse
-// the PrimeTableTest fixture defined earlier:
-
-template <class T>
-class PrimeTableTest2 : public PrimeTableTest<T> {
-};
-
-// Then, declare the test case.  The argument is the name of the test
-// fixture, and also the name of the test case (as usual).  The _P
-// suffix is for "parameterized" or "pattern".
-TYPED_TEST_SUITE_P(PrimeTableTest2);
-
-// Next, use TYPED_TEST_P(TestCaseName, TestName) to define a test,
-// similar to what you do with TEST_F.
-TYPED_TEST_P(PrimeTableTest2, ReturnsFalseForNonPrimes) {
-  EXPECT_FALSE(this->table_->IsPrime(-5));
-  EXPECT_FALSE(this->table_->IsPrime(0));
-  EXPECT_FALSE(this->table_->IsPrime(1));
-  EXPECT_FALSE(this->table_->IsPrime(4));
-  EXPECT_FALSE(this->table_->IsPrime(6));
-  EXPECT_FALSE(this->table_->IsPrime(100));
-}
-
-TYPED_TEST_P(PrimeTableTest2, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(this->table_->IsPrime(2));
-  EXPECT_TRUE(this->table_->IsPrime(3));
-  EXPECT_TRUE(this->table_->IsPrime(5));
-  EXPECT_TRUE(this->table_->IsPrime(7));
-  EXPECT_TRUE(this->table_->IsPrime(11));
-  EXPECT_TRUE(this->table_->IsPrime(131));
-}
-
-TYPED_TEST_P(PrimeTableTest2, CanGetNextPrime) {
-  EXPECT_EQ(2, this->table_->GetNextPrime(0));
-  EXPECT_EQ(3, this->table_->GetNextPrime(2));
-  EXPECT_EQ(5, this->table_->GetNextPrime(3));
-  EXPECT_EQ(7, this->table_->GetNextPrime(5));
-  EXPECT_EQ(11, this->table_->GetNextPrime(7));
-  EXPECT_EQ(131, this->table_->GetNextPrime(128));
-}
-
-// Type-parameterized tests involve one extra step: you have to
-// enumerate the tests you defined:
-REGISTER_TYPED_TEST_SUITE_P(
-    PrimeTableTest2,  // The first argument is the test case name.
-    // The rest of the arguments are the test names.
-    ReturnsFalseForNonPrimes, ReturnsTrueForPrimes, CanGetNextPrime);
-
-// At this point the test pattern is done.  However, you don't have
-// any real test yet as you haven't said which types you want to run
-// the tests with.
-
-// To turn the abstract test pattern into real tests, you instantiate
-// it with a list of types.  Usually the test pattern will be defined
-// in a .h file, and anyone can #include and instantiate it.  You can
-// even instantiate it more than once in the same program.  To tell
-// different instances apart, you give each of them a name, which will
-// become part of the test case name and can be used in test filters.
-
-// The list of types we want to test.  Note that it doesn't have to be
-// defined at the time we write the TYPED_TEST_P()s.
-typedef Types<OnTheFlyPrimeTable, PreCalculatedPrimeTable>
-    PrimeTableImplementations;
-INSTANTIATE_TYPED_TEST_SUITE_P(OnTheFlyAndPreCalculated,    // Instance name
-                               PrimeTableTest2,             // Test case name
-                               PrimeTableImplementations);  // Type list
-
-}  // namespace
diff --git a/third_party/googletest/googletest/samples/sample7_unittest.cc b/third_party/googletest/googletest/samples/sample7_unittest.cc
deleted file mode 100644
index e0efc29..0000000
--- a/third_party/googletest/googletest/samples/sample7_unittest.cc
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test common properties of multiple
-// implementations of an interface (aka interface tests) using
-// value-parameterized tests. Each test in the test case has
-// a parameter that is an interface pointer to an implementation
-// tested.
-
-// The interface and its implementations are in this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-
-using ::testing::TestWithParam;
-using ::testing::Values;
-
-// As a general rule, to prevent a test from affecting the tests that come
-// after it, you should create and destroy the tested objects for each test
-// instead of reusing them.  In this sample we will define a simple factory
-// function for PrimeTable objects.  We will instantiate objects in test's
-// SetUp() method and delete them in TearDown() method.
-typedef PrimeTable* CreatePrimeTableFunc();
-
-PrimeTable* CreateOnTheFlyPrimeTable() {
-  return new OnTheFlyPrimeTable();
-}
-
-template <size_t max_precalculated>
-PrimeTable* CreatePreCalculatedPrimeTable() {
-  return new PreCalculatedPrimeTable(max_precalculated);
-}
-
-// Inside the test body, fixture constructor, SetUp(), and TearDown() you
-// can refer to the test parameter by GetParam().  In this case, the test
-// parameter is a factory function which we call in fixture's SetUp() to
-// create and store an instance of PrimeTable.
-class PrimeTableTestSmpl7 : public TestWithParam<CreatePrimeTableFunc*> {
- public:
-  ~PrimeTableTestSmpl7() override { delete table_; }
-  void SetUp() override { table_ = (*GetParam())(); }
-  void TearDown() override {
-    delete table_;
-    table_ = nullptr;
-  }
-
- protected:
-  PrimeTable* table_;
-};
-
-TEST_P(PrimeTableTestSmpl7, ReturnsFalseForNonPrimes) {
-  EXPECT_FALSE(table_->IsPrime(-5));
-  EXPECT_FALSE(table_->IsPrime(0));
-  EXPECT_FALSE(table_->IsPrime(1));
-  EXPECT_FALSE(table_->IsPrime(4));
-  EXPECT_FALSE(table_->IsPrime(6));
-  EXPECT_FALSE(table_->IsPrime(100));
-}
-
-TEST_P(PrimeTableTestSmpl7, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(table_->IsPrime(2));
-  EXPECT_TRUE(table_->IsPrime(3));
-  EXPECT_TRUE(table_->IsPrime(5));
-  EXPECT_TRUE(table_->IsPrime(7));
-  EXPECT_TRUE(table_->IsPrime(11));
-  EXPECT_TRUE(table_->IsPrime(131));
-}
-
-TEST_P(PrimeTableTestSmpl7, CanGetNextPrime) {
-  EXPECT_EQ(2, table_->GetNextPrime(0));
-  EXPECT_EQ(3, table_->GetNextPrime(2));
-  EXPECT_EQ(5, table_->GetNextPrime(3));
-  EXPECT_EQ(7, table_->GetNextPrime(5));
-  EXPECT_EQ(11, table_->GetNextPrime(7));
-  EXPECT_EQ(131, table_->GetNextPrime(128));
-}
-
-// In order to run value-parameterized tests, you need to instantiate them,
-// or bind them to a list of values which will be used as test parameters.
-// You can instantiate them in a different translation module, or even
-// instantiate them several times.
-//
-// Here, we instantiate our tests with a list of two PrimeTable object
-// factory functions:
-INSTANTIATE_TEST_SUITE_P(OnTheFlyAndPreCalculated, PrimeTableTestSmpl7,
-                         Values(&CreateOnTheFlyPrimeTable,
-                                &CreatePreCalculatedPrimeTable<1000>));
-
-}  // namespace
diff --git a/third_party/googletest/googletest/samples/sample8_unittest.cc b/third_party/googletest/googletest/samples/sample8_unittest.cc
deleted file mode 100644
index 10488b0..0000000
--- a/third_party/googletest/googletest/samples/sample8_unittest.cc
+++ /dev/null
@@ -1,154 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test code relying on some global flag variables.
-// Combine() helps with generating all possible combinations of such flags,
-// and each test is given one combination as a parameter.
-
-// Use class definitions to test from this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-
-// Suppose we want to introduce a new, improved implementation of PrimeTable
-// which combines speed of PrecalcPrimeTable and versatility of
-// OnTheFlyPrimeTable (see prime_tables.h). Inside it instantiates both
-// PrecalcPrimeTable and OnTheFlyPrimeTable and uses the one that is more
-// appropriate under the circumstances. But in low memory conditions, it can be
-// told to instantiate without PrecalcPrimeTable instance at all and use only
-// OnTheFlyPrimeTable.
-class HybridPrimeTable : public PrimeTable {
- public:
-  HybridPrimeTable(bool force_on_the_fly, int max_precalculated)
-      : on_the_fly_impl_(new OnTheFlyPrimeTable),
-        precalc_impl_(force_on_the_fly
-                          ? nullptr
-                          : new PreCalculatedPrimeTable(max_precalculated)),
-        max_precalculated_(max_precalculated) {}
-  ~HybridPrimeTable() override {
-    delete on_the_fly_impl_;
-    delete precalc_impl_;
-  }
-
-  bool IsPrime(int n) const override {
-    if (precalc_impl_ != nullptr && n < max_precalculated_)
-      return precalc_impl_->IsPrime(n);
-    else
-      return on_the_fly_impl_->IsPrime(n);
-  }
-
-  int GetNextPrime(int p) const override {
-    int next_prime = -1;
-    if (precalc_impl_ != nullptr && p < max_precalculated_)
-      next_prime = precalc_impl_->GetNextPrime(p);
-
-    return next_prime != -1 ? next_prime : on_the_fly_impl_->GetNextPrime(p);
-  }
-
- private:
-  OnTheFlyPrimeTable* on_the_fly_impl_;
-  PreCalculatedPrimeTable* precalc_impl_;
-  int max_precalculated_;
-};
-
-using ::testing::TestWithParam;
-using ::testing::Bool;
-using ::testing::Values;
-using ::testing::Combine;
-
-// To test all code paths for HybridPrimeTable we must test it with numbers
-// both within and outside PreCalculatedPrimeTable's capacity and also with
-// PreCalculatedPrimeTable disabled. We do this by defining fixture which will
-// accept different combinations of parameters for instantiating a
-// HybridPrimeTable instance.
-class PrimeTableTest : public TestWithParam< ::std::tuple<bool, int> > {
- protected:
-  void SetUp() override {
-    bool force_on_the_fly;
-    int max_precalculated;
-    std::tie(force_on_the_fly, max_precalculated) = GetParam();
-    table_ = new HybridPrimeTable(force_on_the_fly, max_precalculated);
-  }
-  void TearDown() override {
-    delete table_;
-    table_ = nullptr;
-  }
-  HybridPrimeTable* table_;
-};
-
-TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {
-  // Inside the test body, you can refer to the test parameter by GetParam().
-  // In this case, the test parameter is a PrimeTable interface pointer which
-  // we can use directly.
-  // Please note that you can also save it in the fixture's SetUp() method
-  // or constructor and use saved copy in the tests.
-
-  EXPECT_FALSE(table_->IsPrime(-5));
-  EXPECT_FALSE(table_->IsPrime(0));
-  EXPECT_FALSE(table_->IsPrime(1));
-  EXPECT_FALSE(table_->IsPrime(4));
-  EXPECT_FALSE(table_->IsPrime(6));
-  EXPECT_FALSE(table_->IsPrime(100));
-}
-
-TEST_P(PrimeTableTest, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(table_->IsPrime(2));
-  EXPECT_TRUE(table_->IsPrime(3));
-  EXPECT_TRUE(table_->IsPrime(5));
-  EXPECT_TRUE(table_->IsPrime(7));
-  EXPECT_TRUE(table_->IsPrime(11));
-  EXPECT_TRUE(table_->IsPrime(131));
-}
-
-TEST_P(PrimeTableTest, CanGetNextPrime) {
-  EXPECT_EQ(2, table_->GetNextPrime(0));
-  EXPECT_EQ(3, table_->GetNextPrime(2));
-  EXPECT_EQ(5, table_->GetNextPrime(3));
-  EXPECT_EQ(7, table_->GetNextPrime(5));
-  EXPECT_EQ(11, table_->GetNextPrime(7));
-  EXPECT_EQ(131, table_->GetNextPrime(128));
-}
-
-// In order to run value-parameterized tests, you need to instantiate them,
-// or bind them to a list of values which will be used as test parameters.
-// You can instantiate them in a different translation module, or even
-// instantiate them several times.
-//
-// Here, we instantiate our tests with a list of parameters. We must combine
-// all variations of the boolean flag suppressing PrecalcPrimeTable and some
-// meaningful values for tests. We choose a small value (1), and a value that
-// will put some of the tested numbers beyond the capability of the
-// PrecalcPrimeTable instance and some inside it (10). Combine will produce all
-// possible combinations.
-INSTANTIATE_TEST_SUITE_P(MeaningfulTestParameters, PrimeTableTest,
-                         Combine(Bool(), Values(1, 10)));
-
-}  // namespace
diff --git a/third_party/googletest/googletest/samples/sample9_unittest.cc b/third_party/googletest/googletest/samples/sample9_unittest.cc
deleted file mode 100644
index e502d08..0000000
--- a/third_party/googletest/googletest/samples/sample9_unittest.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2009 Google Inc. All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to use Google Test listener API to implement
-// an alternative console output and how to use the UnitTest reflection API
-// to enumerate test cases and tests and to inspect their results.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestCase;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-namespace {
-// Provides alternative output mode which produces minimal amount of
-// information about tests.
-class TersePrinter : public EmptyTestEventListener {
- private:
-  // Called before any test activity starts.
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {}
-
-  // Called after all test activities have ended.
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED");
-    fflush(stdout);
-  }
-
-  // Called before a test starts.
-  void OnTestStart(const TestInfo& test_info) override {
-    fprintf(stdout,
-            "*** Test %s.%s starting.\n",
-            test_info.test_case_name(),
-            test_info.name());
-    fflush(stdout);
-  }
-
-  // Called after a failed assertion or a SUCCEED() invocation.
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    fprintf(stdout,
-            "%s in %s:%d\n%s\n",
-            test_part_result.failed() ? "*** Failure" : "Success",
-            test_part_result.file_name(),
-            test_part_result.line_number(),
-            test_part_result.summary());
-    fflush(stdout);
-  }
-
-  // Called after a test ends.
-  void OnTestEnd(const TestInfo& test_info) override {
-    fprintf(stdout,
-            "*** Test %s.%s ending.\n",
-            test_info.test_case_name(),
-            test_info.name());
-    fflush(stdout);
-  }
-};  // class TersePrinter
-
-TEST(CustomOutputTest, PrintsMessage) {
-  printf("Printing something from the test body...\n");
-}
-
-TEST(CustomOutputTest, Succeeds) {
-  SUCCEED() << "SUCCEED() has been invoked from here";
-}
-
-TEST(CustomOutputTest, Fails) {
-  EXPECT_EQ(1, 2)
-      << "This test fails in order to demonstrate alternative failure messages";
-}
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  bool terse_output = false;
-  if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 )
-    terse_output = true;
-  else
-    printf("%s\n", "Run this program with --terse_output to change the way "
-           "it prints its output.");
-
-  UnitTest& unit_test = *UnitTest::GetInstance();
-
-  // If we are given the --terse_output command line flag, suppresses the
-  // standard output and attaches own result printer.
-  if (terse_output) {
-    TestEventListeners& listeners = unit_test.listeners();
-
-    // Removes the default console output listener from the list so it will
-    // not receive events from Google Test and won't print any output. Since
-    // this operation transfers ownership of the listener to the caller we
-    // have to delete it as well.
-    delete listeners.Release(listeners.default_result_printer());
-
-    // Adds the custom output listener to the list. It will now receive
-    // events from Google Test and print the alternative output. We don't
-    // have to worry about deleting it since Google Test assumes ownership
-    // over it after adding it to the list.
-    listeners.Append(new TersePrinter);
-  }
-  int ret_val = RUN_ALL_TESTS();
-
-  // This is an example of using the UnitTest reflection API to inspect test
-  // results. Here we discount failures from the tests we expected to fail.
-  int unexpectedly_failed_tests = 0;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const testing::TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      // Counts failed tests that were not meant to fail (those without
-      // 'Fails' in the name).
-      if (test_info.result()->Failed() &&
-          strcmp(test_info.name(), "Fails") != 0) {
-        unexpectedly_failed_tests++;
-      }
-    }
-  }
-
-  // Test that were meant to fail should not affect the test program outcome.
-  if (unexpectedly_failed_tests == 0)
-    ret_val = 0;
-
-  return ret_val;
-}
diff --git a/third_party/googletest/googletest/scripts/README.md b/third_party/googletest/googletest/scripts/README.md
deleted file mode 100644
index fa359fe..0000000
--- a/third_party/googletest/googletest/scripts/README.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# Please Note:
-
-Files in this directory are no longer supported by the maintainers. They
-represent mosty historical artifacts and supported by the community only. There
-is no guarantee whatsoever that these scripts still work.
diff --git a/third_party/googletest/googletest/scripts/common.py b/third_party/googletest/googletest/scripts/common.py
deleted file mode 100644
index 3c0347a..0000000
--- a/third_party/googletest/googletest/scripts/common.py
+++ /dev/null
@@ -1,83 +0,0 @@
-# Copyright 2013 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Shared utilities for writing scripts for Google Test/Mock."""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-
-import os
-import re
-
-
-# Matches the line from 'svn info .' output that describes what SVN
-# path the current local directory corresponds to.  For example, in
-# a googletest SVN workspace's trunk/test directory, the output will be:
-#
-# URL: https://googletest.googlecode.com/svn/trunk/test
-_SVN_INFO_URL_RE = re.compile(r'^URL: https://(\w+)\.googlecode\.com/svn(.*)')
-
-
-def GetCommandOutput(command):
-  """Runs the shell command and returns its stdout as a list of lines."""
-
-  f = os.popen(command, 'r')
-  lines = [line.strip() for line in f.readlines()]
-  f.close()
-  return lines
-
-
-def GetSvnInfo():
-  """Returns the project name and the current SVN workspace's root path."""
-
-  for line in GetCommandOutput('svn info .'):
-    m = _SVN_INFO_URL_RE.match(line)
-    if m:
-      project = m.group(1)  # googletest or googlemock
-      rel_path = m.group(2)
-      root = os.path.realpath(rel_path.count('/') * '../')
-      return project, root
-
-  return None, None
-
-
-def GetSvnTrunk():
-  """Returns the current SVN workspace's trunk root path."""
-
-  _, root = GetSvnInfo()
-  return root + '/trunk' if root else None
-
-
-def IsInGTestSvn():
-  project, _ = GetSvnInfo()
-  return project == 'googletest'
-
-
-def IsInGMockSvn():
-  project, _ = GetSvnInfo()
-  return project == 'googlemock'
diff --git a/third_party/googletest/googletest/scripts/fuse_gtest_files.py b/third_party/googletest/googletest/scripts/fuse_gtest_files.py
deleted file mode 100755
index d0dd464..0000000
--- a/third_party/googletest/googletest/scripts/fuse_gtest_files.py
+++ /dev/null
@@ -1,253 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""fuse_gtest_files.py v0.2.0
-Fuses Google Test source code into a .h file and a .cc file.
-
-SYNOPSIS
-       fuse_gtest_files.py [GTEST_ROOT_DIR] OUTPUT_DIR
-
-       Scans GTEST_ROOT_DIR for Google Test source code, and generates
-       two files: OUTPUT_DIR/gtest/gtest.h and OUTPUT_DIR/gtest/gtest-all.cc.
-       Then you can build your tests by adding OUTPUT_DIR to the include
-       search path and linking with OUTPUT_DIR/gtest/gtest-all.cc.  These
-       two files contain everything you need to use Google Test.  Hence
-       you can "install" Google Test by copying them to wherever you want.
-
-       GTEST_ROOT_DIR can be omitted and defaults to the parent
-       directory of the directory holding this script.
-
-EXAMPLES
-       ./fuse_gtest_files.py fused_gtest
-       ./fuse_gtest_files.py path/to/unpacked/gtest fused_gtest
-
-This tool is experimental.  In particular, it assumes that there is no
-conditional inclusion of Google Test headers.  Please report any
-problems to googletestframework@googlegroups.com.  You can read
-https://github.com/google/googletest/blob/master/googletest/docs/advanced.md for
-more information.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
-import sys
-
-# We assume that this file is in the scripts/ directory in the Google
-# Test root directory.
-DEFAULT_GTEST_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..')
-
-# Regex for matching '#include "gtest/..."'.
-INCLUDE_GTEST_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(gtest/.+)"')
-
-# Regex for matching '#include "src/..."'.
-INCLUDE_SRC_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(src/.+)"')
-
-# Where to find the source seed files.
-GTEST_H_SEED = 'include/gtest/gtest.h'
-GTEST_SPI_H_SEED = 'include/gtest/gtest-spi.h'
-GTEST_ALL_CC_SEED = 'src/gtest-all.cc'
-
-# Where to put the generated files.
-GTEST_H_OUTPUT = 'gtest/gtest.h'
-GTEST_ALL_CC_OUTPUT = 'gtest/gtest-all.cc'
-
-
-def VerifyFileExists(directory, relative_path):
-  """Verifies that the given file exists; aborts on failure.
-
-  relative_path is the file path relative to the given directory.
-  """
-
-  if not os.path.isfile(os.path.join(directory, relative_path)):
-    print('ERROR: Cannot find %s in directory %s.' % (relative_path,
-                                                      directory))
-    print('Please either specify a valid project root directory '
-          'or omit it on the command line.')
-    sys.exit(1)
-
-
-def ValidateGTestRootDir(gtest_root):
-  """Makes sure gtest_root points to a valid gtest root directory.
-
-  The function aborts the program on failure.
-  """
-
-  VerifyFileExists(gtest_root, GTEST_H_SEED)
-  VerifyFileExists(gtest_root, GTEST_ALL_CC_SEED)
-
-
-def VerifyOutputFile(output_dir, relative_path):
-  """Verifies that the given output file path is valid.
-
-  relative_path is relative to the output_dir directory.
-  """
-
-  # Makes sure the output file either doesn't exist or can be overwritten.
-  output_file = os.path.join(output_dir, relative_path)
-  if os.path.exists(output_file):
-    # TODO(wan@google.com): The following user-interaction doesn't
-    # work with automated processes.  We should provide a way for the
-    # Makefile to force overwriting the files.
-    print('%s already exists in directory %s - overwrite it? (y/N) ' %
-          (relative_path, output_dir))
-    answer = sys.stdin.readline().strip()
-    if answer not in ['y', 'Y']:
-      print('ABORTED.')
-      sys.exit(1)
-
-  # Makes sure the directory holding the output file exists; creates
-  # it and all its ancestors if necessary.
-  parent_directory = os.path.dirname(output_file)
-  if not os.path.isdir(parent_directory):
-    os.makedirs(parent_directory)
-
-
-def ValidateOutputDir(output_dir):
-  """Makes sure output_dir points to a valid output directory.
-
-  The function aborts the program on failure.
-  """
-
-  VerifyOutputFile(output_dir, GTEST_H_OUTPUT)
-  VerifyOutputFile(output_dir, GTEST_ALL_CC_OUTPUT)
-
-
-def FuseGTestH(gtest_root, output_dir):
-  """Scans folder gtest_root to generate gtest/gtest.h in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GTEST_H_OUTPUT), 'w')
-  processed_files = set()  # Holds all gtest headers we've processed.
-
-  def ProcessFile(gtest_header_path):
-    """Processes the given gtest header file."""
-
-    # We don't process the same header twice.
-    if gtest_header_path in processed_files:
-      return
-
-    processed_files.add(gtest_header_path)
-
-    # Reads each line in the given gtest header.
-    for line in open(os.path.join(gtest_root, gtest_header_path), 'r'):
-      m = INCLUDE_GTEST_FILE_REGEX.match(line)
-      if m:
-        # It's '#include "gtest/..."' - let's process it recursively.
-        ProcessFile('include/' + m.group(1))
-      else:
-        # Otherwise we copy the line unchanged to the output file.
-        output_file.write(line)
-
-  ProcessFile(GTEST_H_SEED)
-  output_file.close()
-
-
-def FuseGTestAllCcToFile(gtest_root, output_file):
-  """Scans folder gtest_root to generate gtest/gtest-all.cc in output_file."""
-
-  processed_files = set()
-
-  def ProcessFile(gtest_source_file):
-    """Processes the given gtest source file."""
-
-    # We don't process the same #included file twice.
-    if gtest_source_file in processed_files:
-      return
-
-    processed_files.add(gtest_source_file)
-
-    # Reads each line in the given gtest source file.
-    for line in open(os.path.join(gtest_root, gtest_source_file), 'r'):
-      m = INCLUDE_GTEST_FILE_REGEX.match(line)
-      if m:
-        if 'include/' + m.group(1) == GTEST_SPI_H_SEED:
-          # It's '#include "gtest/gtest-spi.h"'.  This file is not
-          # #included by "gtest/gtest.h", so we need to process it.
-          ProcessFile(GTEST_SPI_H_SEED)
-        else:
-          # It's '#include "gtest/foo.h"' where foo is not gtest-spi.
-          # We treat it as '#include "gtest/gtest.h"', as all other
-          # gtest headers are being fused into gtest.h and cannot be
-          # #included directly.
-
-          # There is no need to #include "gtest/gtest.h" more than once.
-          if not GTEST_H_SEED in processed_files:
-            processed_files.add(GTEST_H_SEED)
-            output_file.write('#include "%s"\n' % (GTEST_H_OUTPUT,))
-      else:
-        m = INCLUDE_SRC_FILE_REGEX.match(line)
-        if m:
-          # It's '#include "src/foo"' - let's process it recursively.
-          ProcessFile(m.group(1))
-        else:
-          output_file.write(line)
-
-  ProcessFile(GTEST_ALL_CC_SEED)
-
-
-def FuseGTestAllCc(gtest_root, output_dir):
-  """Scans folder gtest_root to generate gtest/gtest-all.cc in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GTEST_ALL_CC_OUTPUT), 'w')
-  FuseGTestAllCcToFile(gtest_root, output_file)
-  output_file.close()
-
-
-def FuseGTest(gtest_root, output_dir):
-  """Fuses gtest.h and gtest-all.cc."""
-
-  ValidateGTestRootDir(gtest_root)
-  ValidateOutputDir(output_dir)
-
-  FuseGTestH(gtest_root, output_dir)
-  FuseGTestAllCc(gtest_root, output_dir)
-
-
-def main():
-  argc = len(sys.argv)
-  if argc == 2:
-    # fuse_gtest_files.py OUTPUT_DIR
-    FuseGTest(DEFAULT_GTEST_ROOT_DIR, sys.argv[1])
-  elif argc == 3:
-    # fuse_gtest_files.py GTEST_ROOT_DIR OUTPUT_DIR
-    FuseGTest(sys.argv[1], sys.argv[2])
-  else:
-    print(__doc__)
-    sys.exit(1)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/third_party/googletest/googletest/scripts/gen_gtest_pred_impl.py b/third_party/googletest/googletest/scripts/gen_gtest_pred_impl.py
deleted file mode 100755
index e09a6e0..0000000
--- a/third_party/googletest/googletest/scripts/gen_gtest_pred_impl.py
+++ /dev/null
@@ -1,733 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""gen_gtest_pred_impl.py v0.1
-
-Generates the implementation of Google Test predicate assertions and
-accompanying tests.
-
-Usage:
-
-  gen_gtest_pred_impl.py MAX_ARITY
-
-where MAX_ARITY is a positive integer.
-
-The command generates the implementation of up-to MAX_ARITY-ary
-predicate assertions, and writes it to file gtest_pred_impl.h in the
-directory where the script is.  It also generates the accompanying
-unit test in file gtest_pred_impl_unittest.cc.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import sys
-import time
-
-# Where this script is.
-SCRIPT_DIR = os.path.dirname(sys.argv[0])
-
-# Where to store the generated header.
-HEADER = os.path.join(SCRIPT_DIR, '../include/gtest/gtest_pred_impl.h')
-
-# Where to store the generated unit test.
-UNIT_TEST = os.path.join(SCRIPT_DIR, '../test/gtest_pred_impl_unittest.cc')
-
-
-def HeaderPreamble(n):
-  """Returns the preamble for the header file.
-
-  Args:
-    n:  the maximum arity of the predicate macros to be generated.
-  """
-
-  # A map that defines the values used in the preamble template.
-  DEFS = {
-    'today' : time.strftime('%m/%d/%Y'),
-    'year' : time.strftime('%Y'),
-    'command' : '%s %s' % (os.path.basename(sys.argv[0]), n),
-    'n' : n
-    }
-
-  return (
-  """// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on %(today)s by command
-// '%(command)s'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-#include "gtest/gtest.h"
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most %(n)s.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \\
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \\
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \\
-    ; \\
-  else \\
-    on_failure(gtest_ar.failure_message())
-""" % DEFS)
-
-
-def Arity(n):
-  """Returns the English name of the given arity."""
-
-  if n < 0:
-    return None
-  elif n <= 3:
-    return ['nullary', 'unary', 'binary', 'ternary'][n]
-  else:
-    return '%s-ary' % n
-
-
-def Title(word):
-  """Returns the given word in title case.  The difference between
-  this and string's title() method is that Title('4-ary') is '4-ary'
-  while '4-ary'.title() is '4-Ary'."""
-
-  return word[0].upper() + word[1:]
-
-
-def OneTo(n):
-  """Returns the list [1, 2, 3, ..., n]."""
-
-  return range(1, n + 1)
-
-
-def Iter(n, format, sep=''):
-  """Given a positive integer n, a format string that contains 0 or
-  more '%s' format specs, and optionally a separator string, returns
-  the join of n strings, each formatted with the format string on an
-  iterator ranged from 1 to n.
-
-  Example:
-
-  Iter(3, 'v%s', sep=', ') returns 'v1, v2, v3'.
-  """
-
-  # How many '%s' specs are in format?
-  spec_count = len(format.split('%s')) - 1
-  return sep.join([format % (spec_count * (i,)) for i in OneTo(n)])
-
-
-def ImplementationForArity(n):
-  """Returns the implementation of n-ary predicate assertions."""
-
-  # A map the defines the values used in the implementation template.
-  DEFS = {
-    'n' : str(n),
-    'vs' : Iter(n, 'v%s', sep=', '),
-    'vts' : Iter(n, '#v%s', sep=', '),
-    'arity' : Arity(n),
-    'Arity' : Title(Arity(n))
-    }
-
-  impl = """
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED%(n)s.  Don't use
-// this in your code.
-template <typename Pred""" % DEFS
-
-  impl += Iter(n, """,
-          typename T%s""")
-
-  impl += """>
-AssertionResult AssertPred%(n)sHelper(const char* pred_text""" % DEFS
-
-  impl += Iter(n, """,
-                                  const char* e%s""")
-
-  impl += """,
-                                  Pred pred"""
-
-  impl += Iter(n, """,
-                                  const T%s& v%s""")
-
-  impl += """) {
-  if (pred(%(vs)s)) return AssertionSuccess();
-
-""" % DEFS
-
-  impl += '  return AssertionFailure() << pred_text << "("'
-
-  impl += Iter(n, """
-                            << e%s""", sep=' << ", "')
-
-  impl += ' << ") evaluates to false, where"'
-
-  impl += Iter(
-      n, """
-      << "\\n" << e%s << " evaluates to " << ::testing::PrintToString(v%s)"""
-  )
-
-  impl += """;
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT%(n)s.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, on_failure)\\
-  GTEST_ASSERT_(pred_format(%(vts)s, %(vs)s), \\
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED%(n)s.  Don't use
-// this in your code.
-#define GTEST_PRED%(n)s_(pred, %(vs)s, on_failure)\\
-  GTEST_ASSERT_(::testing::AssertPred%(n)sHelper(#pred""" % DEFS
-
-  impl += Iter(n, """, \\
-                                             #v%s""")
-
-  impl += """, \\
-                                             pred"""
-
-  impl += Iter(n, """, \\
-                                             v%s""")
-
-  impl += """), on_failure)
-
-// %(Arity)s predicate assertion macros.
-#define EXPECT_PRED_FORMAT%(n)s(pred_format, %(vs)s) \\
-  GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED%(n)s(pred, %(vs)s) \\
-  GTEST_PRED%(n)s_(pred, %(vs)s, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT%(n)s(pred_format, %(vs)s) \\
-  GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED%(n)s(pred, %(vs)s) \\
-  GTEST_PRED%(n)s_(pred, %(vs)s, GTEST_FATAL_FAILURE_)
-
-""" % DEFS
-
-  return impl
-
-
-def HeaderPostamble():
-  """Returns the postamble for the header file."""
-
-  return """
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-"""
-
-
-def GenerateFile(path, content):
-  """Given a file path and a content string
-     overwrites it with the given content.
-  """
-  print 'Updating file %s . . .' % path
-  f = file(path, 'w+')
-  print >>f, content,
-  f.close()
-
-  print 'File %s has been updated.' % path
-
-
-def GenerateHeader(n):
-  """Given the maximum arity n, updates the header file that implements
-  the predicate assertions.
-  """
-  GenerateFile(HEADER,
-               HeaderPreamble(n)
-               + ''.join([ImplementationForArity(i) for i in OneTo(n)])
-               + HeaderPostamble())
-
-
-def UnitTestPreamble():
-  """Returns the preamble for the unit test file."""
-
-  # A map that defines the values used in the preamble template.
-  DEFS = {
-    'today' : time.strftime('%m/%d/%Y'),
-    'year' : time.strftime('%Y'),
-    'command' : '%s %s' % (os.path.basename(sys.argv[0]), sys.argv[1]),
-    }
-
-  return (
-  """// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on %(today)s by command
-// '%(command)s'.  DO NOT EDIT BY HAND!
-
-// Regression test for gtest_pred_impl.h
-//
-// This file is generated by a script and quite long.  If you intend to
-// learn how Google Test works by reading its unit tests, read
-// gtest_unittest.cc instead.
-//
-// This is intended as a regression test for the Google Test predicate
-// assertions.  We compile it as part of the gtest_unittest target
-// only to keep the implementation tidy and compact, as it is quite
-// involved to set up the stage for testing Google Test using Google
-// Test itself.
-//
-// Currently, gtest_unittest takes ~11 seconds to run in the testing
-// daemon.  In the future, if it grows too large and needs much more
-// time to finish, we should consider separating this file into a
-// stand-alone regression test.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-// A user-defined data type.
-struct Bool {
-  explicit Bool(int val) : value(val != 0) {}
-
-  bool operator>(int n) const { return value > Bool(n).value; }
-
-  Bool operator+(const Bool& rhs) const { return Bool(value + rhs.value); }
-
-  bool operator==(const Bool& rhs) const { return value == rhs.value; }
-
-  bool value;
-};
-
-// Enables Bool to be used in assertions.
-std::ostream& operator<<(std::ostream& os, const Bool& x) {
-  return os << (x.value ? "true" : "false");
-}
-
-""" % DEFS)
-
-
-def TestsForArity(n):
-  """Returns the tests for n-ary predicate assertions."""
-
-  # A map that defines the values used in the template for the tests.
-  DEFS = {
-    'n' : n,
-    'es' : Iter(n, 'e%s', sep=', '),
-    'vs' : Iter(n, 'v%s', sep=', '),
-    'vts' : Iter(n, '#v%s', sep=', '),
-    'tvs' : Iter(n, 'T%s v%s', sep=', '),
-    'int_vs' : Iter(n, 'int v%s', sep=', '),
-    'Bool_vs' : Iter(n, 'Bool v%s', sep=', '),
-    'types' : Iter(n, 'typename T%s', sep=', '),
-    'v_sum' : Iter(n, 'v%s', sep=' + '),
-    'arity' : Arity(n),
-    'Arity' : Title(Arity(n)),
-    }
-
-  tests = (
-  """// Sample functions/functors for testing %(arity)s predicate assertions.
-
-// A %(arity)s predicate function.
-template <%(types)s>
-bool PredFunction%(n)s(%(tvs)s) {
-  return %(v_sum)s > 0;
-}
-
-// The following two functions are needed because a compiler doesn't have
-// a context yet to know which template function must be instantiated.
-bool PredFunction%(n)sInt(%(int_vs)s) {
-  return %(v_sum)s > 0;
-}
-bool PredFunction%(n)sBool(%(Bool_vs)s) {
-  return %(v_sum)s > 0;
-}
-""" % DEFS)
-
-  tests += """
-// A %(arity)s predicate functor.
-struct PredFunctor%(n)s {
-  template <%(types)s>
-  bool operator()(""" % DEFS
-
-  tests += Iter(n, 'const T%s& v%s', sep=""",
-                  """)
-
-  tests += """) {
-    return %(v_sum)s > 0;
-  }
-};
-""" % DEFS
-
-  tests += """
-// A %(arity)s predicate-formatter function.
-template <%(types)s>
-testing::AssertionResult PredFormatFunction%(n)s(""" % DEFS
-
-  tests += Iter(n, 'const char* e%s', sep=""",
-                                             """)
-
-  tests += Iter(n, """,
-                                             const T%s& v%s""")
-
-  tests += """) {
-  if (PredFunction%(n)s(%(vs)s))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << """ % DEFS
-
-  tests += Iter(n, 'e%s', sep=' << " + " << ')
-
-  tests += """
-      << " is expected to be positive, but evaluates to "
-      << %(v_sum)s << ".";
-}
-""" % DEFS
-
-  tests += """
-// A %(arity)s predicate-formatter functor.
-struct PredFormatFunctor%(n)s {
-  template <%(types)s>
-  testing::AssertionResult operator()(""" % DEFS
-
-  tests += Iter(n, 'const char* e%s', sep=""",
-                                      """)
-
-  tests += Iter(n, """,
-                                      const T%s& v%s""")
-
-  tests += """) const {
-    return PredFormatFunction%(n)s(%(es)s, %(vs)s);
-  }
-};
-""" % DEFS
-
-  tests += """
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT%(n)s.
-
-class Predicate%(n)sTest : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;""" % DEFS
-
-  tests += """
-    """ + Iter(n, 'n%s_ = ') + """0;
-  }
-"""
-
-  tests += """
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once."""
-
-  tests += ''.join(["""
-    EXPECT_EQ(1, n%s_) <<
-        "The predicate assertion didn't evaluate argument %s "
-        "exactly once.";""" % (i, i + 1) for i in OneTo(n)])
-
-  tests += """
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-""" % DEFS
-
-  tests += Iter(n, """
-  static int n%s_;""")
-
-  tests += """
-};
-
-bool Predicate%(n)sTest::expected_to_finish_;
-bool Predicate%(n)sTest::finished_;
-""" % DEFS
-
-  tests += Iter(n, """int Predicate%%(n)sTest::n%s_;
-""") % DEFS
-
-  tests += """
-typedef Predicate%(n)sTest EXPECT_PRED_FORMAT%(n)sTest;
-typedef Predicate%(n)sTest ASSERT_PRED_FORMAT%(n)sTest;
-typedef Predicate%(n)sTest EXPECT_PRED%(n)sTest;
-typedef Predicate%(n)sTest ASSERT_PRED%(n)sTest;
-""" % DEFS
-
-  def GenTest(use_format, use_assert, expect_failure,
-              use_functor, use_user_type):
-    """Returns the test for a predicate assertion macro.
-
-    Args:
-      use_format:     true if and only if the assertion is a *_PRED_FORMAT*.
-      use_assert:     true if and only if the assertion is a ASSERT_*.
-      expect_failure: true if and only if the assertion is expected to fail.
-      use_functor:    true if and only if the first argument of the assertion is
-                      a functor (as opposed to a function)
-      use_user_type:  true if and only if the predicate functor/function takes
-                      argument(s) of a user-defined type.
-
-    Example:
-
-      GenTest(1, 0, 0, 1, 0) returns a test that tests the behavior
-      of a successful EXPECT_PRED_FORMATn() that takes a functor
-      whose arguments have built-in types."""
-
-    if use_assert:
-      assrt = 'ASSERT'  # 'assert' is reserved, so we cannot use
-      # that identifier here.
-    else:
-      assrt = 'EXPECT'
-
-    assertion = assrt + '_PRED'
-
-    if use_format:
-      pred_format = 'PredFormat'
-      assertion += '_FORMAT'
-    else:
-      pred_format = 'Pred'
-
-    assertion += '%(n)s' % DEFS
-
-    if use_functor:
-      pred_format_type = 'functor'
-      pred_format += 'Functor%(n)s()'
-    else:
-      pred_format_type = 'function'
-      pred_format += 'Function%(n)s'
-      if not use_format:
-        if use_user_type:
-          pred_format += 'Bool'
-        else:
-          pred_format += 'Int'
-
-    test_name = pred_format_type.title()
-
-    if use_user_type:
-      arg_type = 'user-defined type (Bool)'
-      test_name += 'OnUserType'
-      if expect_failure:
-        arg = 'Bool(n%s_++)'
-      else:
-        arg = 'Bool(++n%s_)'
-    else:
-      arg_type = 'built-in type (int)'
-      test_name += 'OnBuiltInType'
-      if expect_failure:
-        arg = 'n%s_++'
-      else:
-        arg = '++n%s_'
-
-    if expect_failure:
-      successful_or_failed = 'failed'
-      expected_or_not = 'expected.'
-      test_name +=  'Failure'
-    else:
-      successful_or_failed = 'successful'
-      expected_or_not = 'UNEXPECTED!'
-      test_name +=  'Success'
-
-    # A map that defines the values used in the test template.
-    defs = DEFS.copy()
-    defs.update({
-      'assert' : assrt,
-      'assertion' : assertion,
-      'test_name' : test_name,
-      'pf_type' : pred_format_type,
-      'pf' : pred_format,
-      'arg_type' : arg_type,
-      'arg' : arg,
-      'successful' : successful_or_failed,
-      'expected' : expected_or_not,
-      })
-
-    test = """
-// Tests a %(successful)s %(assertion)s where the
-// predicate-formatter is a %(pf_type)s on a %(arg_type)s.
-TEST_F(%(assertion)sTest, %(test_name)s) {""" % defs
-
-    indent = (len(assertion) + 3)*' '
-    extra_indent = ''
-
-    if expect_failure:
-      extra_indent = '  '
-      if use_assert:
-        test += """
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT"""
-      else:
-        test += """
-  EXPECT_NONFATAL_FAILURE({  // NOLINT"""
-
-    test += '\n' + extra_indent + """  %(assertion)s(%(pf)s""" % defs
-
-    test = test % defs
-    test += Iter(n, ',\n' + indent + extra_indent + '%(arg)s' % defs)
-    test += ');\n' + extra_indent + '  finished_ = true;\n'
-
-    if expect_failure:
-      test += '  }, "");\n'
-
-    test += '}\n'
-    return test
-
-  # Generates tests for all 2**6 = 64 combinations.
-  tests += ''.join([GenTest(use_format, use_assert, expect_failure,
-                            use_functor, use_user_type)
-                    for use_format in [0, 1]
-                    for use_assert in [0, 1]
-                    for expect_failure in [0, 1]
-                    for use_functor in [0, 1]
-                    for use_user_type in [0, 1]
-                    ])
-
-  return tests
-
-
-def UnitTestPostamble():
-  """Returns the postamble for the tests."""
-
-  return ''
-
-
-def GenerateUnitTest(n):
-  """Returns the tests for up-to n-ary predicate assertions."""
-
-  GenerateFile(UNIT_TEST,
-               UnitTestPreamble()
-               + ''.join([TestsForArity(i) for i in OneTo(n)])
-               + UnitTestPostamble())
-
-
-def _Main():
-  """The entry point of the script.  Generates the header file and its
-  unit test."""
-
-  if len(sys.argv) != 2:
-    print __doc__
-    print 'Author: ' + __author__
-    sys.exit(1)
-
-  n = int(sys.argv[1])
-  GenerateHeader(n)
-  GenerateUnitTest(n)
-
-
-if __name__ == '__main__':
-  _Main()
diff --git a/third_party/googletest/googletest/scripts/gtest-config.in b/third_party/googletest/googletest/scripts/gtest-config.in
deleted file mode 100755
index 780f843..0000000
--- a/third_party/googletest/googletest/scripts/gtest-config.in
+++ /dev/null
@@ -1,274 +0,0 @@
-#!/bin/sh
-
-# These variables are automatically filled in by the configure script.
-name="@PACKAGE_TARNAME@"
-version="@PACKAGE_VERSION@"
-
-show_usage()
-{
-  echo "Usage: gtest-config [OPTIONS...]"
-}
-
-show_help()
-{
-  show_usage
-  cat <<\EOF
-
-The `gtest-config' script provides access to the necessary compile and linking
-flags to connect with Google C++ Testing Framework, both in a build prior to
-installation, and on the system proper after installation. The installation
-overrides may be issued in combination with any other queries, but will only
-affect installation queries if called on a built but not installed gtest. The
-installation queries may not be issued with any other types of queries, and
-only one installation query may be made at a time. The version queries and
-compiler flag queries may be combined as desired but not mixed. Different
-version queries are always combined with logical "and" semantics, and only the
-last of any particular query is used while all previous ones ignored. All
-versions must be specified as a sequence of numbers separated by periods.
-Compiler flag queries output the union of the sets of flags when combined.
-
- Examples:
-  gtest-config --min-version=1.0 || echo "Insufficient Google Test version."
-
-  g++ $(gtest-config --cppflags --cxxflags) -o foo.o -c foo.cpp
-  g++ $(gtest-config --ldflags --libs) -o foo foo.o
-
-  # When using a built but not installed Google Test:
-  g++ $(../../my_gtest_build/scripts/gtest-config ...) ...
-
-  # When using an installed Google Test, but with installation overrides:
-  export GTEST_PREFIX="/opt"
-  g++ $(gtest-config --libdir="/opt/lib64" ...) ...
-
- Help:
-  --usage                    brief usage information
-  --help                     display this help message
-
- Installation Overrides:
-  --prefix=<dir>             overrides the installation prefix
-  --exec-prefix=<dir>        overrides the executable installation prefix
-  --libdir=<dir>             overrides the library installation prefix
-  --includedir=<dir>         overrides the header file installation prefix
-
- Installation Queries:
-  --prefix                   installation prefix
-  --exec-prefix              executable installation prefix
-  --libdir                   library installation directory
-  --includedir               header file installation directory
-  --version                  the version of the Google Test installation
-
- Version Queries:
-  --min-version=VERSION      return 0 if the version is at least VERSION
-  --exact-version=VERSION    return 0 if the version is exactly VERSION
-  --max-version=VERSION      return 0 if the version is at most VERSION
-
- Compilation Flag Queries:
-  --cppflags                 compile flags specific to the C-like preprocessors
-  --cxxflags                 compile flags appropriate for C++ programs
-  --ldflags                  linker flags
-  --libs                     libraries for linking
-
-EOF
-}
-
-# This function bounds our version with a min and a max. It uses some clever
-# POSIX-compliant variable expansion to portably do all the work in the shell
-# and avoid any dependency on a particular "sed" or "awk" implementation.
-# Notable is that it will only ever compare the first 3 components of versions.
-# Further components will be cleanly stripped off. All versions must be
-# unadorned, so "v1.0" will *not* work. The minimum version must be in $1, and
-# the max in $2. TODO(chandlerc@google.com): If this ever breaks, we should
-# investigate expanding this via autom4te from AS_VERSION_COMPARE rather than
-# continuing to maintain our own shell version.
-check_versions()
-{
-  major_version=${version%%.*}
-  minor_version="0"
-  point_version="0"
-  if test "${version#*.}" != "${version}"; then
-    minor_version=${version#*.}
-    minor_version=${minor_version%%.*}
-  fi
-  if test "${version#*.*.}" != "${version}"; then
-    point_version=${version#*.*.}
-    point_version=${point_version%%.*}
-  fi
-
-  min_version="$1"
-  min_major_version=${min_version%%.*}
-  min_minor_version="0"
-  min_point_version="0"
-  if test "${min_version#*.}" != "${min_version}"; then
-    min_minor_version=${min_version#*.}
-    min_minor_version=${min_minor_version%%.*}
-  fi
-  if test "${min_version#*.*.}" != "${min_version}"; then
-    min_point_version=${min_version#*.*.}
-    min_point_version=${min_point_version%%.*}
-  fi
-
-  max_version="$2"
-  max_major_version=${max_version%%.*}
-  max_minor_version="0"
-  max_point_version="0"
-  if test "${max_version#*.}" != "${max_version}"; then
-    max_minor_version=${max_version#*.}
-    max_minor_version=${max_minor_version%%.*}
-  fi
-  if test "${max_version#*.*.}" != "${max_version}"; then
-    max_point_version=${max_version#*.*.}
-    max_point_version=${max_point_version%%.*}
-  fi
-
-  test $(($major_version)) -lt $(($min_major_version)) && exit 1
-  if test $(($major_version)) -eq $(($min_major_version)); then
-    test $(($minor_version)) -lt $(($min_minor_version)) && exit 1
-    if test $(($minor_version)) -eq $(($min_minor_version)); then
-      test $(($point_version)) -lt $(($min_point_version)) && exit 1
-    fi
-  fi
-
-  test $(($major_version)) -gt $(($max_major_version)) && exit 1
-  if test $(($major_version)) -eq $(($max_major_version)); then
-    test $(($minor_version)) -gt $(($max_minor_version)) && exit 1
-    if test $(($minor_version)) -eq $(($max_minor_version)); then
-      test $(($point_version)) -gt $(($max_point_version)) && exit 1
-    fi
-  fi
-
-  exit 0
-}
-
-# Show the usage line when no arguments are specified.
-if test $# -eq 0; then
-  show_usage
-  exit 1
-fi
-
-while test $# -gt 0; do
-  case $1 in
-    --usage)          show_usage;         exit 0;;
-    --help)           show_help;          exit 0;;
-
-    # Installation overrides
-    --prefix=*)       GTEST_PREFIX=${1#--prefix=};;
-    --exec-prefix=*)  GTEST_EXEC_PREFIX=${1#--exec-prefix=};;
-    --libdir=*)       GTEST_LIBDIR=${1#--libdir=};;
-    --includedir=*)   GTEST_INCLUDEDIR=${1#--includedir=};;
-
-    # Installation queries
-    --prefix|--exec-prefix|--libdir|--includedir|--version)
-      if test -n "${do_query}"; then
-        show_usage
-        exit 1
-      fi
-      do_query=${1#--}
-      ;;
-
-    # Version checking
-    --min-version=*)
-      do_check_versions=yes
-      min_version=${1#--min-version=}
-      ;;
-    --max-version=*)
-      do_check_versions=yes
-      max_version=${1#--max-version=}
-      ;;
-    --exact-version=*)
-      do_check_versions=yes
-      exact_version=${1#--exact-version=}
-      ;;
-
-    # Compiler flag output
-    --cppflags)       echo_cppflags=yes;;
-    --cxxflags)       echo_cxxflags=yes;;
-    --ldflags)        echo_ldflags=yes;;
-    --libs)           echo_libs=yes;;
-
-    # Everything else is an error
-    *)                show_usage;         exit 1;;
-  esac
-  shift
-done
-
-# These have defaults filled in by the configure script but can also be
-# overridden by environment variables or command line parameters.
-prefix="${GTEST_PREFIX:-@prefix@}"
-exec_prefix="${GTEST_EXEC_PREFIX:-@exec_prefix@}"
-libdir="${GTEST_LIBDIR:-@libdir@}"
-includedir="${GTEST_INCLUDEDIR:-@includedir@}"
-
-# We try and detect if our binary is not located at its installed location. If
-# it's not, we provide variables pointing to the source and build tree rather
-# than to the install tree. This allows building against a just-built gtest
-# rather than an installed gtest.
-bindir="@bindir@"
-this_relative_bindir=`dirname $0`
-this_bindir=`cd ${this_relative_bindir}; pwd -P`
-if test "${this_bindir}" = "${this_bindir%${bindir}}"; then
-  # The path to the script doesn't end in the bindir sequence from Autoconf,
-  # assume that we are in a build tree.
-  build_dir=`dirname ${this_bindir}`
-  src_dir=`cd ${this_bindir}; cd @top_srcdir@; pwd -P`
-
-  # TODO(chandlerc@google.com): This is a dangerous dependency on libtool, we
-  # should work to remove it, and/or remove libtool altogether, replacing it
-  # with direct references to the library and a link path.
-  gtest_libs="${build_dir}/lib/libgtest.la @PTHREAD_CFLAGS@ @PTHREAD_LIBS@"
-  gtest_ldflags=""
-
-  # We provide hooks to include from either the source or build dir, where the
-  # build dir is always preferred. This will potentially allow us to write
-  # build rules for generated headers and have them automatically be preferred
-  # over provided versions.
-  gtest_cppflags="-I${build_dir}/include -I${src_dir}/include"
-  gtest_cxxflags="@PTHREAD_CFLAGS@"
-else
-  # We're using an installed gtest, although it may be staged under some
-  # prefix. Assume (as our own libraries do) that we can resolve the prefix,
-  # and are present in the dynamic link paths.
-  gtest_ldflags="-L${libdir}"
-  gtest_libs="-l${name} @PTHREAD_CFLAGS@ @PTHREAD_LIBS@"
-  gtest_cppflags="-I${includedir}"
-  gtest_cxxflags="@PTHREAD_CFLAGS@"
-fi
-
-# Do an installation query if requested.
-if test -n "$do_query"; then
-  case $do_query in
-    prefix)           echo $prefix;       exit 0;;
-    exec-prefix)      echo $exec_prefix;  exit 0;;
-    libdir)           echo $libdir;       exit 0;;
-    includedir)       echo $includedir;   exit 0;;
-    version)          echo $version;      exit 0;;
-    *)                show_usage;         exit 1;;
-  esac
-fi
-
-# Do a version check if requested.
-if test "$do_check_versions" = "yes"; then
-  # Make sure we didn't receive a bad combination of parameters.
-  test "$echo_cppflags" = "yes" && show_usage && exit 1
-  test "$echo_cxxflags" = "yes" && show_usage && exit 1
-  test "$echo_ldflags" = "yes"  && show_usage && exit 1
-  test "$echo_libs" = "yes"     && show_usage && exit 1
-
-  if test "$exact_version" != ""; then
-    check_versions $exact_version $exact_version
-    # unreachable
-  else
-    check_versions ${min_version:-0.0.0} ${max_version:-9999.9999.9999}
-    # unreachable
-  fi
-fi
-
-# Do the output in the correct order so that these can be used in-line of
-# a compiler invocation.
-output=""
-test "$echo_cppflags" = "yes" && output="$output $gtest_cppflags"
-test "$echo_cxxflags" = "yes" && output="$output $gtest_cxxflags"
-test "$echo_ldflags" = "yes"  && output="$output $gtest_ldflags"
-test "$echo_libs" = "yes"     && output="$output $gtest_libs"
-echo $output
-
-exit 0
diff --git a/third_party/googletest/googletest/scripts/release_docs.py b/third_party/googletest/googletest/scripts/release_docs.py
deleted file mode 100755
index 8d24f28..0000000
--- a/third_party/googletest/googletest/scripts/release_docs.py
+++ /dev/null
@@ -1,158 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2013 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Script for branching Google Test/Mock wiki pages for a new version.
-
-SYNOPSIS
-       release_docs.py NEW_RELEASE_VERSION
-
-       Google Test and Google Mock's external user documentation is in
-       interlinked wiki files.  When we release a new version of
-       Google Test or Google Mock, we need to branch the wiki files
-       such that users of a specific version of Google Test/Mock can
-       look up documentation relevant for that version.  This script
-       automates that process by:
-
-         - branching the current wiki pages (which document the
-           behavior of the SVN trunk head) to pages for the specified
-           version (e.g. branching FAQ.wiki to V2_6_FAQ.wiki when
-           NEW_RELEASE_VERSION is 2.6);
-         - updating the links in the branched files to point to the branched
-           version (e.g. a link in V2_6_FAQ.wiki that pointed to
-           Primer.wiki#Anchor will now point to V2_6_Primer.wiki#Anchor).
-
-       NOTE: NEW_RELEASE_VERSION must be a NEW version number for
-       which the wiki pages don't yet exist; otherwise you'll get SVN
-       errors like "svn: Path 'V1_7_PumpManual.wiki' is not a
-       directory" when running the script.
-
-EXAMPLE
-       $ cd PATH/TO/GTEST_SVN_WORKSPACE/trunk
-       $ scripts/release_docs.py 2.6  # create wiki pages for v2.6
-       $ svn status                   # verify the file list
-       $ svn diff                     # verify the file contents
-       $ svn commit -m "release wiki pages for v2.6"
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-import sys
-
-import common
-
-
-# Wiki pages that shouldn't be branched for every gtest/gmock release.
-GTEST_UNVERSIONED_WIKIS = ['DevGuide.wiki']
-GMOCK_UNVERSIONED_WIKIS = [
-    'DesignDoc.wiki',
-    'DevGuide.wiki',
-    'KnownIssues.wiki'
-    ]
-
-
-def DropWikiSuffix(wiki_filename):
-  """Removes the .wiki suffix (if any) from the given filename."""
-
-  return (wiki_filename[:-len('.wiki')] if wiki_filename.endswith('.wiki')
-          else wiki_filename)
-
-
-class WikiBrancher(object):
-  """Branches ..."""
-
-  def __init__(self, dot_version):
-    self.project, svn_root_path = common.GetSvnInfo()
-    if self.project not in ('googletest', 'googlemock'):
-      sys.exit('This script must be run in a gtest or gmock SVN workspace.')
-    self.wiki_dir = svn_root_path + '/wiki'
-    # Turn '2.6' to 'V2_6_'.
-    self.version_prefix = 'V' + dot_version.replace('.', '_') + '_'
-    self.files_to_branch = self.GetFilesToBranch()
-    page_names = [DropWikiSuffix(f) for f in self.files_to_branch]
-    # A link to Foo.wiki is in one of the following forms:
-    #   [Foo words]
-    #   [Foo#Anchor words]
-    #   [http://code.google.com/.../wiki/Foo words]
-    #   [http://code.google.com/.../wiki/Foo#Anchor words]
-    # We want to replace 'Foo' with 'V2_6_Foo' in the above cases.
-    self.search_for_re = re.compile(
-        # This regex matches either
-        #   [Foo
-        # or
-        #   /wiki/Foo
-        # followed by a space or a #, where Foo is the name of an
-        # unversioned wiki page.
-        r'(\[|/wiki/)(%s)([ #])' % '|'.join(page_names))
-    self.replace_with = r'\1%s\2\3' % (self.version_prefix,)
-
-  def GetFilesToBranch(self):
-    """Returns a list of .wiki file names that need to be branched."""
-
-    unversioned_wikis = (GTEST_UNVERSIONED_WIKIS if self.project == 'googletest'
-                         else GMOCK_UNVERSIONED_WIKIS)
-    return [f for f in os.listdir(self.wiki_dir)
-            if (f.endswith('.wiki') and
-                not re.match(r'^V\d', f) and  # Excluded versioned .wiki files.
-                f not in unversioned_wikis)]
-
-  def BranchFiles(self):
-    """Branches the .wiki files needed to be branched."""
-
-    print 'Branching %d .wiki files:' % (len(self.files_to_branch),)
-    os.chdir(self.wiki_dir)
-    for f in self.files_to_branch:
-      command = 'svn cp %s %s%s' % (f, self.version_prefix, f)
-      print command
-      os.system(command)
-
-  def UpdateLinksInBranchedFiles(self):
-
-    for f in self.files_to_branch:
-      source_file = os.path.join(self.wiki_dir, f)
-      versioned_file = os.path.join(self.wiki_dir, self.version_prefix + f)
-      print 'Updating links in %s.' % (versioned_file,)
-      text = file(source_file, 'r').read()
-      new_text = self.search_for_re.sub(self.replace_with, text)
-      file(versioned_file, 'w').write(new_text)
-
-
-def main():
-  if len(sys.argv) != 2:
-    sys.exit(__doc__)
-
-  brancher = WikiBrancher(sys.argv[1])
-  brancher.BranchFiles()
-  brancher.UpdateLinksInBranchedFiles()
-
-
-if __name__ == '__main__':
-  main()
diff --git a/third_party/googletest/googletest/scripts/run_with_path.py b/third_party/googletest/googletest/scripts/run_with_path.py
deleted file mode 100755
index d46ab4d..0000000
--- a/third_party/googletest/googletest/scripts/run_with_path.py
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2010 Google Inc. All Rights Reserved.
-
-"""Runs program specified in the command line with the substituted PATH.
-
-   This script is needed for to support building under Pulse which is unable
-   to override the existing PATH variable.
-"""
-
-import os
-import subprocess
-import sys
-
-SUBST_PATH_ENV_VAR_NAME = "SUBST_PATH"
-
-def main():
-  if SUBST_PATH_ENV_VAR_NAME in os.environ:
-    os.environ["PATH"] = os.environ[SUBST_PATH_ENV_VAR_NAME]
-
-  exit_code = subprocess.Popen(sys.argv[1:]).wait()
-
-  # exit_code is negative (-signal) if the process has been terminated by
-  # a signal. Returning negative exit code is not portable and so we return
-  # 100 instead.
-  if exit_code < 0:
-    exit_code = 100
-
-  sys.exit(exit_code)
-
-if __name__ == "__main__":
-  main()
diff --git a/third_party/googletest/googletest/scripts/test/Makefile b/third_party/googletest/googletest/scripts/test/Makefile
deleted file mode 100644
index cdff584..0000000
--- a/third_party/googletest/googletest/scripts/test/Makefile
+++ /dev/null
@@ -1,59 +0,0 @@
-# A Makefile for fusing Google Test and building a sample test against it.
-#
-# SYNOPSIS:
-#
-#   make [all]  - makes everything.
-#   make TARGET - makes the given target.
-#   make check  - makes everything and runs the built sample test.
-#   make clean  - removes all files generated by make.
-
-# Points to the root of fused Google Test, relative to where this file is.
-FUSED_GTEST_DIR = output
-
-# Paths to the fused gtest files.
-FUSED_GTEST_H = $(FUSED_GTEST_DIR)/gtest/gtest.h
-FUSED_GTEST_ALL_CC = $(FUSED_GTEST_DIR)/gtest/gtest-all.cc
-
-# Where to find the sample test.
-SAMPLE_DIR = ../../samples
-
-# Where to find gtest_main.cc.
-GTEST_MAIN_CC = ../../src/gtest_main.cc
-
-# Flags passed to the preprocessor.
-# We have no idea here whether pthreads is available in the system, so
-# disable its use.
-CPPFLAGS += -I$(FUSED_GTEST_DIR) -DGTEST_HAS_PTHREAD=0
-
-# Flags passed to the C++ compiler.
-CXXFLAGS += -g
-
-all : sample1_unittest
-
-check : all
-	./sample1_unittest
-
-clean :
-	rm -rf $(FUSED_GTEST_DIR) sample1_unittest *.o
-
-$(FUSED_GTEST_H) :
-	../fuse_gtest_files.py $(FUSED_GTEST_DIR)
-
-$(FUSED_GTEST_ALL_CC) :
-	../fuse_gtest_files.py $(FUSED_GTEST_DIR)
-
-gtest-all.o : $(FUSED_GTEST_H) $(FUSED_GTEST_ALL_CC)
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(FUSED_GTEST_DIR)/gtest/gtest-all.cc
-
-gtest_main.o : $(FUSED_GTEST_H) $(GTEST_MAIN_CC)
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(GTEST_MAIN_CC)
-
-sample1.o : $(SAMPLE_DIR)/sample1.cc $(SAMPLE_DIR)/sample1.h
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(SAMPLE_DIR)/sample1.cc
-
-sample1_unittest.o : $(SAMPLE_DIR)/sample1_unittest.cc \
-                     $(SAMPLE_DIR)/sample1.h $(FUSED_GTEST_H)
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(SAMPLE_DIR)/sample1_unittest.cc
-
-sample1_unittest : sample1.o sample1_unittest.o gtest-all.o gtest_main.o
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $^ -o $@
diff --git a/third_party/googletest/googletest/scripts/upload.py b/third_party/googletest/googletest/scripts/upload.py
deleted file mode 100755
index eba5711..0000000
--- a/third_party/googletest/googletest/scripts/upload.py
+++ /dev/null
@@ -1,1402 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tool for uploading diffs from a version control system to the codereview app.
-
-Usage summary: upload.py [options] [-- diff_options]
-
-Diff options are passed to the diff command of the underlying system.
-
-Supported version control systems:
-  Git
-  Mercurial
-  Subversion
-
-It is important for Git/Mercurial users to specify a tree/node/branch to diff
-against by using the '--rev' option.
-"""
-# This code is derived from appcfg.py in the App Engine SDK (open source),
-# and from ASPN recipe #146306.
-
-import cookielib
-import getpass
-import logging
-import md5
-import mimetypes
-import optparse
-import os
-import re
-import socket
-import subprocess
-import sys
-import urllib
-import urllib2
-import urlparse
-
-try:
-  import readline
-except ImportError:
-  pass
-
-# The logging verbosity:
-#  0: Errors only.
-#  1: Status messages.
-#  2: Info logs.
-#  3: Debug logs.
-verbosity = 1
-
-# Max size of patch or base file.
-MAX_UPLOAD_SIZE = 900 * 1024
-
-
-def GetEmail(prompt):
-  """Prompts the user for their email address and returns it.
-
-  The last used email address is saved to a file and offered up as a suggestion
-  to the user. If the user presses enter without typing in anything the last
-  used email address is used. If the user enters a new address, it is saved
-  for next time we prompt.
-
-  """
-  last_email_file_name = os.path.expanduser("~/.last_codereview_email_address")
-  last_email = ""
-  if os.path.exists(last_email_file_name):
-    try:
-      last_email_file = open(last_email_file_name, "r")
-      last_email = last_email_file.readline().strip("\n")
-      last_email_file.close()
-      prompt += " [%s]" % last_email
-    except IOError, e:
-      pass
-  email = raw_input(prompt + ": ").strip()
-  if email:
-    try:
-      last_email_file = open(last_email_file_name, "w")
-      last_email_file.write(email)
-      last_email_file.close()
-    except IOError, e:
-      pass
-  else:
-    email = last_email
-  return email
-
-
-def StatusUpdate(msg):
-  """Print a status message to stdout.
-
-  If 'verbosity' is greater than 0, print the message.
-
-  Args:
-    msg: The string to print.
-  """
-  if verbosity > 0:
-    print msg
-
-
-def ErrorExit(msg):
-  """Print an error message to stderr and exit."""
-  print >>sys.stderr, msg
-  sys.exit(1)
-
-
-class ClientLoginError(urllib2.HTTPError):
-  """Raised to indicate there was an error authenticating with ClientLogin."""
-
-  def __init__(self, url, code, msg, headers, args):
-    urllib2.HTTPError.__init__(self, url, code, msg, headers, None)
-    self.args = args
-    self.reason = args["Error"]
-
-
-class AbstractRpcServer(object):
-  """Provides a common interface for a simple RPC server."""
-
-  def __init__(self, host, auth_function, host_override=None, extra_headers={},
-               save_cookies=False):
-    """Creates a new HttpRpcServer.
-
-    Args:
-      host: The host to send requests to.
-      auth_function: A function that takes no arguments and returns an
-        (email, password) tuple when called. Will be called if authentication
-        is required.
-      host_override: The host header to send to the server (defaults to host).
-      extra_headers: A dict of extra headers to append to every request.
-      save_cookies: If True, save the authentication cookies to local disk.
-        If False, use an in-memory cookiejar instead.  Subclasses must
-        implement this functionality.  Defaults to False.
-    """
-    self.host = host
-    self.host_override = host_override
-    self.auth_function = auth_function
-    self.authenticated = False
-    self.extra_headers = extra_headers
-    self.save_cookies = save_cookies
-    self.opener = self._GetOpener()
-    if self.host_override:
-      logging.info("Server: %s; Host: %s", self.host, self.host_override)
-    else:
-      logging.info("Server: %s", self.host)
-
-  def _GetOpener(self):
-    """Returns an OpenerDirector for making HTTP requests.
-
-    Returns:
-      A urllib2.OpenerDirector object.
-    """
-    raise NotImplementedError()
-
-  def _CreateRequest(self, url, data=None):
-    """Creates a new urllib request."""
-    logging.debug("Creating request for: '%s' with payload:\n%s", url, data)
-    req = urllib2.Request(url, data=data)
-    if self.host_override:
-      req.add_header("Host", self.host_override)
-    for key, value in self.extra_headers.iteritems():
-      req.add_header(key, value)
-    return req
-
-  def _GetAuthToken(self, email, password):
-    """Uses ClientLogin to authenticate the user, returning an auth token.
-
-    Args:
-      email:    The user's email address
-      password: The user's password
-
-    Raises:
-      ClientLoginError: If there was an error authenticating with ClientLogin.
-      HTTPError: If there was some other form of HTTP error.
-
-    Returns:
-      The authentication token returned by ClientLogin.
-    """
-    account_type = "GOOGLE"
-    if self.host.endswith(".google.com"):
-      # Needed for use inside Google.
-      account_type = "HOSTED"
-    req = self._CreateRequest(
-        url="https://www.google.com/accounts/ClientLogin",
-        data=urllib.urlencode({
-            "Email": email,
-            "Passwd": password,
-            "service": "ah",
-            "source": "rietveld-codereview-upload",
-            "accountType": account_type,
-        }),
-    )
-    try:
-      response = self.opener.open(req)
-      response_body = response.read()
-      response_dict = dict(x.split("=")
-                           for x in response_body.split("\n") if x)
-      return response_dict["Auth"]
-    except urllib2.HTTPError, e:
-      if e.code == 403:
-        body = e.read()
-        response_dict = dict(x.split("=", 1) for x in body.split("\n") if x)
-        raise ClientLoginError(req.get_full_url(), e.code, e.msg,
-                               e.headers, response_dict)
-      else:
-        raise
-
-  def _GetAuthCookie(self, auth_token):
-    """Fetches authentication cookies for an authentication token.
-
-    Args:
-      auth_token: The authentication token returned by ClientLogin.
-
-    Raises:
-      HTTPError: If there was an error fetching the authentication cookies.
-    """
-    # This is a dummy value to allow us to identify when we're successful.
-    continue_location = "http://localhost/"
-    args = {"continue": continue_location, "auth": auth_token}
-    req = self._CreateRequest("http://%s/_ah/login?%s" %
-                              (self.host, urllib.urlencode(args)))
-    try:
-      response = self.opener.open(req)
-    except urllib2.HTTPError, e:
-      response = e
-    if (response.code != 302 or
-        response.info()["location"] != continue_location):
-      raise urllib2.HTTPError(req.get_full_url(), response.code, response.msg,
-                              response.headers, response.fp)
-    self.authenticated = True
-
-  def _Authenticate(self):
-    """Authenticates the user.
-
-    The authentication process works as follows:
-     1) We get a username and password from the user
-     2) We use ClientLogin to obtain an AUTH token for the user
-        (see https://developers.google.com/identity/protocols/AuthForInstalledApps).
-     3) We pass the auth token to /_ah/login on the server to obtain an
-        authentication cookie. If login was successful, it tries to redirect
-        us to the URL we provided.
-
-    If we attempt to access the upload API without first obtaining an
-    authentication cookie, it returns a 401 response and directs us to
-    authenticate ourselves with ClientLogin.
-    """
-    for i in range(3):
-      credentials = self.auth_function()
-      try:
-        auth_token = self._GetAuthToken(credentials[0], credentials[1])
-      except ClientLoginError, e:
-        if e.reason == "BadAuthentication":
-          print >>sys.stderr, "Invalid username or password."
-          continue
-        if e.reason == "CaptchaRequired":
-          print >>sys.stderr, (
-              "Please go to\n"
-              "https://www.google.com/accounts/DisplayUnlockCaptcha\n"
-              "and verify you are a human.  Then try again.")
-          break
-        if e.reason == "NotVerified":
-          print >>sys.stderr, "Account not verified."
-          break
-        if e.reason == "TermsNotAgreed":
-          print >>sys.stderr, "User has not agreed to TOS."
-          break
-        if e.reason == "AccountDeleted":
-          print >>sys.stderr, "The user account has been deleted."
-          break
-        if e.reason == "AccountDisabled":
-          print >>sys.stderr, "The user account has been disabled."
-          break
-        if e.reason == "ServiceDisabled":
-          print >>sys.stderr, ("The user's access to the service has been "
-                               "disabled.")
-          break
-        if e.reason == "ServiceUnavailable":
-          print >>sys.stderr, "The service is not available; try again later."
-          break
-        raise
-      self._GetAuthCookie(auth_token)
-      return
-
-  def Send(self, request_path, payload=None,
-           content_type="application/octet-stream",
-           timeout=None,
-           **kwargs):
-    """Sends an RPC and returns the response.
-
-    Args:
-      request_path: The path to send the request to, eg /api/appversion/create.
-      payload: The body of the request, or None to send an empty request.
-      content_type: The Content-Type header to use.
-      timeout: timeout in seconds; default None i.e. no timeout.
-        (Note: for large requests on OS X, the timeout doesn't work right.)
-      kwargs: Any keyword arguments are converted into query string parameters.
-
-    Returns:
-      The response body, as a string.
-    """
-    # TODO: Don't require authentication.  Let the server say
-    # whether it is necessary.
-    if not self.authenticated:
-      self._Authenticate()
-
-    old_timeout = socket.getdefaulttimeout()
-    socket.setdefaulttimeout(timeout)
-    try:
-      tries = 0
-      while True:
-        tries += 1
-        args = dict(kwargs)
-        url = "http://%s%s" % (self.host, request_path)
-        if args:
-          url += "?" + urllib.urlencode(args)
-        req = self._CreateRequest(url=url, data=payload)
-        req.add_header("Content-Type", content_type)
-        try:
-          f = self.opener.open(req)
-          response = f.read()
-          f.close()
-          return response
-        except urllib2.HTTPError, e:
-          if tries > 3:
-            raise
-          elif e.code == 401:
-            self._Authenticate()
-##           elif e.code >= 500 and e.code < 600:
-##             # Server Error - try again.
-##             continue
-          else:
-            raise
-    finally:
-      socket.setdefaulttimeout(old_timeout)
-
-
-class HttpRpcServer(AbstractRpcServer):
-  """Provides a simplified RPC-style interface for HTTP requests."""
-
-  def _Authenticate(self):
-    """Save the cookie jar after authentication."""
-    super(HttpRpcServer, self)._Authenticate()
-    if self.save_cookies:
-      StatusUpdate("Saving authentication cookies to %s" % self.cookie_file)
-      self.cookie_jar.save()
-
-  def _GetOpener(self):
-    """Returns an OpenerDirector that supports cookies and ignores redirects.
-
-    Returns:
-      A urllib2.OpenerDirector object.
-    """
-    opener = urllib2.OpenerDirector()
-    opener.add_handler(urllib2.ProxyHandler())
-    opener.add_handler(urllib2.UnknownHandler())
-    opener.add_handler(urllib2.HTTPHandler())
-    opener.add_handler(urllib2.HTTPDefaultErrorHandler())
-    opener.add_handler(urllib2.HTTPSHandler())
-    opener.add_handler(urllib2.HTTPErrorProcessor())
-    if self.save_cookies:
-      self.cookie_file = os.path.expanduser("~/.codereview_upload_cookies")
-      self.cookie_jar = cookielib.MozillaCookieJar(self.cookie_file)
-      if os.path.exists(self.cookie_file):
-        try:
-          self.cookie_jar.load()
-          self.authenticated = True
-          StatusUpdate("Loaded authentication cookies from %s" %
-                       self.cookie_file)
-        except (cookielib.LoadError, IOError):
-          # Failed to load cookies - just ignore them.
-          pass
-      else:
-        # Create an empty cookie file with mode 600
-        fd = os.open(self.cookie_file, os.O_CREAT, 0600)
-        os.close(fd)
-      # Always chmod the cookie file
-      os.chmod(self.cookie_file, 0600)
-    else:
-      # Don't save cookies across runs of update.py.
-      self.cookie_jar = cookielib.CookieJar()
-    opener.add_handler(urllib2.HTTPCookieProcessor(self.cookie_jar))
-    return opener
-
-
-parser = optparse.OptionParser(usage="%prog [options] [-- diff_options]")
-parser.add_option("-y", "--assume_yes", action="store_true",
-                  dest="assume_yes", default=False,
-                  help="Assume that the answer to yes/no questions is 'yes'.")
-# Logging
-group = parser.add_option_group("Logging options")
-group.add_option("-q", "--quiet", action="store_const", const=0,
-                 dest="verbose", help="Print errors only.")
-group.add_option("-v", "--verbose", action="store_const", const=2,
-                 dest="verbose", default=1,
-                 help="Print info level logs (default).")
-group.add_option("--noisy", action="store_const", const=3,
-                 dest="verbose", help="Print all logs.")
-# Review server
-group = parser.add_option_group("Review server options")
-group.add_option("-s", "--server", action="store", dest="server",
-                 default="codereview.appspot.com",
-                 metavar="SERVER",
-                 help=("The server to upload to. The format is host[:port]. "
-                       "Defaults to 'codereview.appspot.com'."))
-group.add_option("-e", "--email", action="store", dest="email",
-                 metavar="EMAIL", default=None,
-                 help="The username to use. Will prompt if omitted.")
-group.add_option("-H", "--host", action="store", dest="host",
-                 metavar="HOST", default=None,
-                 help="Overrides the Host header sent with all RPCs.")
-group.add_option("--no_cookies", action="store_false",
-                 dest="save_cookies", default=True,
-                 help="Do not save authentication cookies to local disk.")
-# Issue
-group = parser.add_option_group("Issue options")
-group.add_option("-d", "--description", action="store", dest="description",
-                 metavar="DESCRIPTION", default=None,
-                 help="Optional description when creating an issue.")
-group.add_option("-f", "--description_file", action="store",
-                 dest="description_file", metavar="DESCRIPTION_FILE",
-                 default=None,
-                 help="Optional path of a file that contains "
-                      "the description when creating an issue.")
-group.add_option("-r", "--reviewers", action="store", dest="reviewers",
-                 metavar="REVIEWERS", default=None,
-                 help="Add reviewers (comma separated email addresses).")
-group.add_option("--cc", action="store", dest="cc",
-                 metavar="CC", default=None,
-                 help="Add CC (comma separated email addresses).")
-# Upload options
-group = parser.add_option_group("Patch options")
-group.add_option("-m", "--message", action="store", dest="message",
-                 metavar="MESSAGE", default=None,
-                 help="A message to identify the patch. "
-                      "Will prompt if omitted.")
-group.add_option("-i", "--issue", type="int", action="store",
-                 metavar="ISSUE", default=None,
-                 help="Issue number to which to add. Defaults to new issue.")
-group.add_option("--download_base", action="store_true",
-                 dest="download_base", default=False,
-                 help="Base files will be downloaded by the server "
-                 "(side-by-side diffs may not work on files with CRs).")
-group.add_option("--rev", action="store", dest="revision",
-                 metavar="REV", default=None,
-                 help="Branch/tree/revision to diff against (used by DVCS).")
-group.add_option("--send_mail", action="store_true",
-                 dest="send_mail", default=False,
-                 help="Send notification email to reviewers.")
-
-
-def GetRpcServer(options):
-  """Returns an instance of an AbstractRpcServer.
-
-  Returns:
-    A new AbstractRpcServer, on which RPC calls can be made.
-  """
-
-  rpc_server_class = HttpRpcServer
-
-  def GetUserCredentials():
-    """Prompts the user for a username and password."""
-    email = options.email
-    if email is None:
-      email = GetEmail("Email (login for uploading to %s)" % options.server)
-    password = getpass.getpass("Password for %s: " % email)
-    return (email, password)
-
-  # If this is the dev_appserver, use fake authentication.
-  host = (options.host or options.server).lower()
-  if host == "localhost" or host.startswith("localhost:"):
-    email = options.email
-    if email is None:
-      email = "test@example.com"
-      logging.info("Using debug user %s.  Override with --email" % email)
-    server = rpc_server_class(
-        options.server,
-        lambda: (email, "password"),
-        host_override=options.host,
-        extra_headers={"Cookie":
-                       'dev_appserver_login="%s:False"' % email},
-        save_cookies=options.save_cookies)
-    # Don't try to talk to ClientLogin.
-    server.authenticated = True
-    return server
-
-  return rpc_server_class(options.server, GetUserCredentials,
-                          host_override=options.host,
-                          save_cookies=options.save_cookies)
-
-
-def EncodeMultipartFormData(fields, files):
-  """Encode form fields for multipart/form-data.
-
-  Args:
-    fields: A sequence of (name, value) elements for regular form fields.
-    files: A sequence of (name, filename, value) elements for data to be
-           uploaded as files.
-  Returns:
-    (content_type, body) ready for httplib.HTTP instance.
-
-  Source:
-    https://web.archive.org/web/20160116052001/code.activestate.com/recipes/146306
-  """
-  BOUNDARY = '-M-A-G-I-C---B-O-U-N-D-A-R-Y-'
-  CRLF = '\r\n'
-  lines = []
-  for (key, value) in fields:
-    lines.append('--' + BOUNDARY)
-    lines.append('Content-Disposition: form-data; name="%s"' % key)
-    lines.append('')
-    lines.append(value)
-  for (key, filename, value) in files:
-    lines.append('--' + BOUNDARY)
-    lines.append('Content-Disposition: form-data; name="%s"; filename="%s"' %
-             (key, filename))
-    lines.append('Content-Type: %s' % GetContentType(filename))
-    lines.append('')
-    lines.append(value)
-  lines.append('--' + BOUNDARY + '--')
-  lines.append('')
-  body = CRLF.join(lines)
-  content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
-  return content_type, body
-
-
-def GetContentType(filename):
-  """Helper to guess the content-type from the filename."""
-  return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
-
-
-# Use a shell for subcommands on Windows to get a PATH search.
-use_shell = sys.platform.startswith("win")
-
-def RunShellWithReturnCode(command, print_output=False,
-                           universal_newlines=True):
-  """Executes a command and returns the output from stdout and the return code.
-
-  Args:
-    command: Command to execute.
-    print_output: If True, the output is printed to stdout.
-                  If False, both stdout and stderr are ignored.
-    universal_newlines: Use universal_newlines flag (default: True).
-
-  Returns:
-    Tuple (output, return code)
-  """
-  logging.info("Running %s", command)
-  p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                       shell=use_shell, universal_newlines=universal_newlines)
-  if print_output:
-    output_array = []
-    while True:
-      line = p.stdout.readline()
-      if not line:
-        break
-      print line.strip("\n")
-      output_array.append(line)
-    output = "".join(output_array)
-  else:
-    output = p.stdout.read()
-  p.wait()
-  errout = p.stderr.read()
-  if print_output and errout:
-    print >>sys.stderr, errout
-  p.stdout.close()
-  p.stderr.close()
-  return output, p.returncode
-
-
-def RunShell(command, silent_ok=False, universal_newlines=True,
-             print_output=False):
-  data, retcode = RunShellWithReturnCode(command, print_output,
-                                         universal_newlines)
-  if retcode:
-    ErrorExit("Got error status from %s:\n%s" % (command, data))
-  if not silent_ok and not data:
-    ErrorExit("No output from %s" % command)
-  return data
-
-
-class VersionControlSystem(object):
-  """Abstract base class providing an interface to the VCS."""
-
-  def __init__(self, options):
-    """Constructor.
-
-    Args:
-      options: Command line options.
-    """
-    self.options = options
-
-  def GenerateDiff(self, args):
-    """Return the current diff as a string.
-
-    Args:
-      args: Extra arguments to pass to the diff command.
-    """
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-  def GetUnknownFiles(self):
-    """Return a list of files unknown to the VCS."""
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-  def CheckForUnknownFiles(self):
-    """Show an "are you sure?" prompt if there are unknown files."""
-    unknown_files = self.GetUnknownFiles()
-    if unknown_files:
-      print "The following files are not added to version control:"
-      for line in unknown_files:
-        print line
-      prompt = "Are you sure to continue?(y/N) "
-      answer = raw_input(prompt).strip()
-      if answer != "y":
-        ErrorExit("User aborted")
-
-  def GetBaseFile(self, filename):
-    """Get the content of the upstream version of a file.
-
-    Returns:
-      A tuple (base_content, new_content, is_binary, status)
-        base_content: The contents of the base file.
-        new_content: For text files, this is empty.  For binary files, this is
-          the contents of the new file, since the diff output won't contain
-          information to reconstruct the current file.
-        is_binary: True iff the file is binary.
-        status: The status of the file.
-    """
-
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-
-  def GetBaseFiles(self, diff):
-    """Helper that calls GetBase file for each file in the patch.
-
-    Returns:
-      A dictionary that maps from filename to GetBaseFile's tuple.  Filenames
-      are retrieved based on lines that start with "Index:" or
-      "Property changes on:".
-    """
-    files = {}
-    for line in diff.splitlines(True):
-      if line.startswith('Index:') or line.startswith('Property changes on:'):
-        unused, filename = line.split(':', 1)
-        # On Windows if a file has property changes its filename uses '\'
-        # instead of '/'.
-        filename = filename.strip().replace('\\', '/')
-        files[filename] = self.GetBaseFile(filename)
-    return files
-
-
-  def UploadBaseFiles(self, issue, rpc_server, patch_list, patchset, options,
-                      files):
-    """Uploads the base files (and if necessary, the current ones as well)."""
-
-    def UploadFile(filename, file_id, content, is_binary, status, is_base):
-      """Uploads a file to the server."""
-      file_too_large = False
-      if is_base:
-        type = "base"
-      else:
-        type = "current"
-      if len(content) > MAX_UPLOAD_SIZE:
-        print ("Not uploading the %s file for %s because it's too large." %
-               (type, filename))
-        file_too_large = True
-        content = ""
-      checksum = md5.new(content).hexdigest()
-      if options.verbose > 0 and not file_too_large:
-        print "Uploading %s file for %s" % (type, filename)
-      url = "/%d/upload_content/%d/%d" % (int(issue), int(patchset), file_id)
-      form_fields = [("filename", filename),
-                     ("status", status),
-                     ("checksum", checksum),
-                     ("is_binary", str(is_binary)),
-                     ("is_current", str(not is_base)),
-                    ]
-      if file_too_large:
-        form_fields.append(("file_too_large", "1"))
-      if options.email:
-        form_fields.append(("user", options.email))
-      ctype, body = EncodeMultipartFormData(form_fields,
-                                            [("data", filename, content)])
-      response_body = rpc_server.Send(url, body,
-                                      content_type=ctype)
-      if not response_body.startswith("OK"):
-        StatusUpdate("  --> %s" % response_body)
-        sys.exit(1)
-
-    patches = dict()
-    [patches.setdefault(v, k) for k, v in patch_list]
-    for filename in patches.keys():
-      base_content, new_content, is_binary, status = files[filename]
-      file_id_str = patches.get(filename)
-      if file_id_str.find("nobase") != -1:
-        base_content = None
-        file_id_str = file_id_str[file_id_str.rfind("_") + 1:]
-      file_id = int(file_id_str)
-      if base_content != None:
-        UploadFile(filename, file_id, base_content, is_binary, status, True)
-      if new_content != None:
-        UploadFile(filename, file_id, new_content, is_binary, status, False)
-
-  def IsImage(self, filename):
-    """Returns true if the filename has an image extension."""
-    mimetype =  mimetypes.guess_type(filename)[0]
-    if not mimetype:
-      return False
-    return mimetype.startswith("image/")
-
-
-class SubversionVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Subversion."""
-
-  def __init__(self, options):
-    super(SubversionVCS, self).__init__(options)
-    if self.options.revision:
-      match = re.match(r"(\d+)(:(\d+))?", self.options.revision)
-      if not match:
-        ErrorExit("Invalid Subversion revision %s." % self.options.revision)
-      self.rev_start = match.group(1)
-      self.rev_end = match.group(3)
-    else:
-      self.rev_start = self.rev_end = None
-    # Cache output from "svn list -r REVNO dirname".
-    # Keys: dirname, Values: 2-tuple (output for start rev and end rev).
-    self.svnls_cache = {}
-    # SVN base URL is required to fetch files deleted in an older revision.
-    # Result is cached to not guess it over and over again in GetBaseFile().
-    required = self.options.download_base or self.options.revision is not None
-    self.svn_base = self._GuessBase(required)
-
-  def GuessBase(self, required):
-    """Wrapper for _GuessBase."""
-    return self.svn_base
-
-  def _GuessBase(self, required):
-    """Returns the SVN base URL.
-
-    Args:
-      required: If true, exits if the url can't be guessed, otherwise None is
-        returned.
-    """
-    info = RunShell(["svn", "info"])
-    for line in info.splitlines():
-      words = line.split()
-      if len(words) == 2 and words[0] == "URL:":
-        url = words[1]
-        scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
-        username, netloc = urllib.splituser(netloc)
-        if username:
-          logging.info("Removed username from base URL")
-        if netloc.endswith("svn.python.org"):
-          if netloc == "svn.python.org":
-            if path.startswith("/projects/"):
-              path = path[9:]
-          elif netloc != "pythondev@svn.python.org":
-            ErrorExit("Unrecognized Python URL: %s" % url)
-          base = "http://svn.python.org/view/*checkout*%s/" % path
-          logging.info("Guessed Python base = %s", base)
-        elif netloc.endswith("svn.collab.net"):
-          if path.startswith("/repos/"):
-            path = path[6:]
-          base = "http://svn.collab.net/viewvc/*checkout*%s/" % path
-          logging.info("Guessed CollabNet base = %s", base)
-        elif netloc.endswith(".googlecode.com"):
-          path = path + "/"
-          base = urlparse.urlunparse(("http", netloc, path, params,
-                                      query, fragment))
-          logging.info("Guessed Google Code base = %s", base)
-        else:
-          path = path + "/"
-          base = urlparse.urlunparse((scheme, netloc, path, params,
-                                      query, fragment))
-          logging.info("Guessed base = %s", base)
-        return base
-    if required:
-      ErrorExit("Can't find URL in output from svn info")
-    return None
-
-  def GenerateDiff(self, args):
-    cmd = ["svn", "diff"]
-    if self.options.revision:
-      cmd += ["-r", self.options.revision]
-    cmd.extend(args)
-    data = RunShell(cmd)
-    count = 0
-    for line in data.splitlines():
-      if line.startswith("Index:") or line.startswith("Property changes on:"):
-        count += 1
-        logging.info(line)
-    if not count:
-      ErrorExit("No valid patches found in output from svn diff")
-    return data
-
-  def _CollapseKeywords(self, content, keyword_str):
-    """Collapses SVN keywords."""
-    # svn cat translates keywords but svn diff doesn't. As a result of this
-    # behavior patching.PatchChunks() fails with a chunk mismatch error.
-    # This part was originally written by the Review Board development team
-    # who had the same problem (https://reviews.reviewboard.org/r/276/).
-    # Mapping of keywords to known aliases
-    svn_keywords = {
-      # Standard keywords
-      'Date':                ['Date', 'LastChangedDate'],
-      'Revision':            ['Revision', 'LastChangedRevision', 'Rev'],
-      'Author':              ['Author', 'LastChangedBy'],
-      'HeadURL':             ['HeadURL', 'URL'],
-      'Id':                  ['Id'],
-
-      # Aliases
-      'LastChangedDate':     ['LastChangedDate', 'Date'],
-      'LastChangedRevision': ['LastChangedRevision', 'Rev', 'Revision'],
-      'LastChangedBy':       ['LastChangedBy', 'Author'],
-      'URL':                 ['URL', 'HeadURL'],
-    }
-
-    def repl(m):
-       if m.group(2):
-         return "$%s::%s$" % (m.group(1), " " * len(m.group(3)))
-       return "$%s$" % m.group(1)
-    keywords = [keyword
-                for name in keyword_str.split(" ")
-                for keyword in svn_keywords.get(name, [])]
-    return re.sub(r"\$(%s):(:?)([^\$]+)\$" % '|'.join(keywords), repl, content)
-
-  def GetUnknownFiles(self):
-    status = RunShell(["svn", "status", "--ignore-externals"], silent_ok=True)
-    unknown_files = []
-    for line in status.split("\n"):
-      if line and line[0] == "?":
-        unknown_files.append(line)
-    return unknown_files
-
-  def ReadFile(self, filename):
-    """Returns the contents of a file."""
-    file = open(filename, 'rb')
-    result = ""
-    try:
-      result = file.read()
-    finally:
-      file.close()
-    return result
-
-  def GetStatus(self, filename):
-    """Returns the status of a file."""
-    if not self.options.revision:
-      status = RunShell(["svn", "status", "--ignore-externals", filename])
-      if not status:
-        ErrorExit("svn status returned no output for %s" % filename)
-      status_lines = status.splitlines()
-      # If file is in a cl, the output will begin with
-      # "\n--- Changelist 'cl_name':\n".  See
-      # https://web.archive.org/web/20090918234815/svn.collab.net/repos/svn/trunk/notes/changelist-design.txt
-      if (len(status_lines) == 3 and
-          not status_lines[0] and
-          status_lines[1].startswith("--- Changelist")):
-        status = status_lines[2]
-      else:
-        status = status_lines[0]
-    # If we have a revision to diff against we need to run "svn list"
-    # for the old and the new revision and compare the results to get
-    # the correct status for a file.
-    else:
-      dirname, relfilename = os.path.split(filename)
-      if dirname not in self.svnls_cache:
-        cmd = ["svn", "list", "-r", self.rev_start, dirname or "."]
-        out, returncode = RunShellWithReturnCode(cmd)
-        if returncode:
-          ErrorExit("Failed to get status for %s." % filename)
-        old_files = out.splitlines()
-        args = ["svn", "list"]
-        if self.rev_end:
-          args += ["-r", self.rev_end]
-        cmd = args + [dirname or "."]
-        out, returncode = RunShellWithReturnCode(cmd)
-        if returncode:
-          ErrorExit("Failed to run command %s" % cmd)
-        self.svnls_cache[dirname] = (old_files, out.splitlines())
-      old_files, new_files = self.svnls_cache[dirname]
-      if relfilename in old_files and relfilename not in new_files:
-        status = "D   "
-      elif relfilename in old_files and relfilename in new_files:
-        status = "M   "
-      else:
-        status = "A   "
-    return status
-
-  def GetBaseFile(self, filename):
-    status = self.GetStatus(filename)
-    base_content = None
-    new_content = None
-
-    # If a file is copied its status will be "A  +", which signifies
-    # "addition-with-history".  See "svn st" for more information.  We need to
-    # upload the original file or else diff parsing will fail if the file was
-    # edited.
-    if status[0] == "A" and status[3] != "+":
-      # We'll need to upload the new content if we're adding a binary file
-      # since diff's output won't contain it.
-      mimetype = RunShell(["svn", "propget", "svn:mime-type", filename],
-                          silent_ok=True)
-      base_content = ""
-      is_binary = mimetype and not mimetype.startswith("text/")
-      if is_binary and self.IsImage(filename):
-        new_content = self.ReadFile(filename)
-    elif (status[0] in ("M", "D", "R") or
-          (status[0] == "A" and status[3] == "+") or  # Copied file.
-          (status[0] == " " and status[1] == "M")):  # Property change.
-      args = []
-      if self.options.revision:
-        url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-      else:
-        # Don't change filename, it's needed later.
-        url = filename
-        args += ["-r", "BASE"]
-      cmd = ["svn"] + args + ["propget", "svn:mime-type", url]
-      mimetype, returncode = RunShellWithReturnCode(cmd)
-      if returncode:
-        # File does not exist in the requested revision.
-        # Reset mimetype, it contains an error message.
-        mimetype = ""
-      get_base = False
-      is_binary = mimetype and not mimetype.startswith("text/")
-      if status[0] == " ":
-        # Empty base content just to force an upload.
-        base_content = ""
-      elif is_binary:
-        if self.IsImage(filename):
-          get_base = True
-          if status[0] == "M":
-            if not self.rev_end:
-              new_content = self.ReadFile(filename)
-            else:
-              url = "%s/%s@%s" % (self.svn_base, filename, self.rev_end)
-              new_content = RunShell(["svn", "cat", url],
-                                     universal_newlines=True, silent_ok=True)
-        else:
-          base_content = ""
-      else:
-        get_base = True
-
-      if get_base:
-        if is_binary:
-          universal_newlines = False
-        else:
-          universal_newlines = True
-        if self.rev_start:
-          # "svn cat -r REV delete_file.txt" doesn't work. cat requires
-          # the full URL with "@REV" appended instead of using "-r" option.
-          url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-          base_content = RunShell(["svn", "cat", url],
-                                  universal_newlines=universal_newlines,
-                                  silent_ok=True)
-        else:
-          base_content = RunShell(["svn", "cat", filename],
-                                  universal_newlines=universal_newlines,
-                                  silent_ok=True)
-        if not is_binary:
-          args = []
-          if self.rev_start:
-            url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-          else:
-            url = filename
-            args += ["-r", "BASE"]
-          cmd = ["svn"] + args + ["propget", "svn:keywords", url]
-          keywords, returncode = RunShellWithReturnCode(cmd)
-          if keywords and not returncode:
-            base_content = self._CollapseKeywords(base_content, keywords)
-    else:
-      StatusUpdate("svn status returned unexpected output: %s" % status)
-      sys.exit(1)
-    return base_content, new_content, is_binary, status[0:5]
-
-
-class GitVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Git."""
-
-  def __init__(self, options):
-    super(GitVCS, self).__init__(options)
-    # Map of filename -> hash of base file.
-    self.base_hashes = {}
-
-  def GenerateDiff(self, extra_args):
-    # This is more complicated than svn's GenerateDiff because we must convert
-    # the diff output to include an svn-style "Index:" line as well as record
-    # the hashes of the base files, so we can upload them along with our diff.
-    if self.options.revision:
-      extra_args = [self.options.revision] + extra_args
-    gitdiff = RunShell(["git", "diff", "--full-index"] + extra_args)
-    svndiff = []
-    filecount = 0
-    filename = None
-    for line in gitdiff.splitlines():
-      match = re.match(r"diff --git a/(.*) b/.*$", line)
-      if match:
-        filecount += 1
-        filename = match.group(1)
-        svndiff.append("Index: %s\n" % filename)
-      else:
-        # The "index" line in a git diff looks like this (long hashes elided):
-        #   index 82c0d44..b2cee3f 100755
-        # We want to save the left hash, as that identifies the base file.
-        match = re.match(r"index (\w+)\.\.", line)
-        if match:
-          self.base_hashes[filename] = match.group(1)
-      svndiff.append(line + "\n")
-    if not filecount:
-      ErrorExit("No valid patches found in output from git diff")
-    return "".join(svndiff)
-
-  def GetUnknownFiles(self):
-    status = RunShell(["git", "ls-files", "--exclude-standard", "--others"],
-                      silent_ok=True)
-    return status.splitlines()
-
-  def GetBaseFile(self, filename):
-    hash = self.base_hashes[filename]
-    base_content = None
-    new_content = None
-    is_binary = False
-    if hash == "0" * 40:  # All-zero hash indicates no base file.
-      status = "A"
-      base_content = ""
-    else:
-      status = "M"
-      base_content, returncode = RunShellWithReturnCode(["git", "show", hash])
-      if returncode:
-        ErrorExit("Got error status from 'git show %s'" % hash)
-    return (base_content, new_content, is_binary, status)
-
-
-class MercurialVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Mercurial."""
-
-  def __init__(self, options, repo_dir):
-    super(MercurialVCS, self).__init__(options)
-    # Absolute path to repository (we can be in a subdir)
-    self.repo_dir = os.path.normpath(repo_dir)
-    # Compute the subdir
-    cwd = os.path.normpath(os.getcwd())
-    assert cwd.startswith(self.repo_dir)
-    self.subdir = cwd[len(self.repo_dir):].lstrip(r"\/")
-    if self.options.revision:
-      self.base_rev = self.options.revision
-    else:
-      self.base_rev = RunShell(["hg", "parent", "-q"]).split(':')[1].strip()
-
-  def _GetRelPath(self, filename):
-    """Get relative path of a file according to the current directory,
-    given its logical path in the repo."""
-    assert filename.startswith(self.subdir), filename
-    return filename[len(self.subdir):].lstrip(r"\/")
-
-  def GenerateDiff(self, extra_args):
-    # If no file specified, restrict to the current subdir
-    extra_args = extra_args or ["."]
-    cmd = ["hg", "diff", "--git", "-r", self.base_rev] + extra_args
-    data = RunShell(cmd, silent_ok=True)
-    svndiff = []
-    filecount = 0
-    for line in data.splitlines():
-      m = re.match("diff --git a/(\S+) b/(\S+)", line)
-      if m:
-        # Modify line to make it look like as it comes from svn diff.
-        # With this modification no changes on the server side are required
-        # to make upload.py work with Mercurial repos.
-        # NOTE: for proper handling of moved/copied files, we have to use
-        # the second filename.
-        filename = m.group(2)
-        svndiff.append("Index: %s" % filename)
-        svndiff.append("=" * 67)
-        filecount += 1
-        logging.info(line)
-      else:
-        svndiff.append(line)
-    if not filecount:
-      ErrorExit("No valid patches found in output from hg diff")
-    return "\n".join(svndiff) + "\n"
-
-  def GetUnknownFiles(self):
-    """Return a list of files unknown to the VCS."""
-    args = []
-    status = RunShell(["hg", "status", "--rev", self.base_rev, "-u", "."],
-        silent_ok=True)
-    unknown_files = []
-    for line in status.splitlines():
-      st, fn = line.split(" ", 1)
-      if st == "?":
-        unknown_files.append(fn)
-    return unknown_files
-
-  def GetBaseFile(self, filename):
-    # "hg status" and "hg cat" both take a path relative to the current subdir
-    # rather than to the repo root, but "hg diff" has given us the full path
-    # to the repo root.
-    base_content = ""
-    new_content = None
-    is_binary = False
-    oldrelpath = relpath = self._GetRelPath(filename)
-    # "hg status -C" returns two lines for moved/copied files, one otherwise
-    out = RunShell(["hg", "status", "-C", "--rev", self.base_rev, relpath])
-    out = out.splitlines()
-    # HACK: strip error message about missing file/directory if it isn't in
-    # the working copy
-    if out[0].startswith('%s: ' % relpath):
-      out = out[1:]
-    if len(out) > 1:
-      # Moved/copied => considered as modified, use old filename to
-      # retrieve base contents
-      oldrelpath = out[1].strip()
-      status = "M"
-    else:
-      status, _ = out[0].split(' ', 1)
-    if status != "A":
-      base_content = RunShell(["hg", "cat", "-r", self.base_rev, oldrelpath],
-        silent_ok=True)
-      is_binary = "\0" in base_content  # Mercurial's heuristic
-    if status != "R":
-      new_content = open(relpath, "rb").read()
-      is_binary = is_binary or "\0" in new_content
-    if is_binary and base_content:
-      # Fetch again without converting newlines
-      base_content = RunShell(["hg", "cat", "-r", self.base_rev, oldrelpath],
-        silent_ok=True, universal_newlines=False)
-    if not is_binary or not self.IsImage(relpath):
-      new_content = None
-    return base_content, new_content, is_binary, status
-
-
-# NOTE: The SplitPatch function is duplicated in engine.py, keep them in sync.
-def SplitPatch(data):
-  """Splits a patch into separate pieces for each file.
-
-  Args:
-    data: A string containing the output of svn diff.
-
-  Returns:
-    A list of 2-tuple (filename, text) where text is the svn diff output
-      pertaining to filename.
-  """
-  patches = []
-  filename = None
-  diff = []
-  for line in data.splitlines(True):
-    new_filename = None
-    if line.startswith('Index:'):
-      unused, new_filename = line.split(':', 1)
-      new_filename = new_filename.strip()
-    elif line.startswith('Property changes on:'):
-      unused, temp_filename = line.split(':', 1)
-      # When a file is modified, paths use '/' between directories, however
-      # when a property is modified '\' is used on Windows.  Make them the same
-      # otherwise the file shows up twice.
-      temp_filename = temp_filename.strip().replace('\\', '/')
-      if temp_filename != filename:
-        # File has property changes but no modifications, create a new diff.
-        new_filename = temp_filename
-    if new_filename:
-      if filename and diff:
-        patches.append((filename, ''.join(diff)))
-      filename = new_filename
-      diff = [line]
-      continue
-    if diff is not None:
-      diff.append(line)
-  if filename and diff:
-    patches.append((filename, ''.join(diff)))
-  return patches
-
-
-def UploadSeparatePatches(issue, rpc_server, patchset, data, options):
-  """Uploads a separate patch for each file in the diff output.
-
-  Returns a list of [patch_key, filename] for each file.
-  """
-  patches = SplitPatch(data)
-  rv = []
-  for patch in patches:
-    if len(patch[1]) > MAX_UPLOAD_SIZE:
-      print ("Not uploading the patch for " + patch[0] +
-             " because the file is too large.")
-      continue
-    form_fields = [("filename", patch[0])]
-    if not options.download_base:
-      form_fields.append(("content_upload", "1"))
-    files = [("data", "data.diff", patch[1])]
-    ctype, body = EncodeMultipartFormData(form_fields, files)
-    url = "/%d/upload_patch/%d" % (int(issue), int(patchset))
-    print "Uploading patch for " + patch[0]
-    response_body = rpc_server.Send(url, body, content_type=ctype)
-    lines = response_body.splitlines()
-    if not lines or lines[0] != "OK":
-      StatusUpdate("  --> %s" % response_body)
-      sys.exit(1)
-    rv.append([lines[1], patch[0]])
-  return rv
-
-
-def GuessVCS(options):
-  """Helper to guess the version control system.
-
-  This examines the current directory, guesses which VersionControlSystem
-  we're using, and returns an instance of the appropriate class.  Exit with an
-  error if we can't figure it out.
-
-  Returns:
-    A VersionControlSystem instance. Exits if the VCS can't be guessed.
-  """
-  # Mercurial has a command to get the base directory of a repository
-  # Try running it, but don't die if we don't have hg installed.
-  # NOTE: we try Mercurial first as it can sit on top of an SVN working copy.
-  try:
-    out, returncode = RunShellWithReturnCode(["hg", "root"])
-    if returncode == 0:
-      return MercurialVCS(options, out.strip())
-  except OSError, (errno, message):
-    if errno != 2:  # ENOENT -- they don't have hg installed.
-      raise
-
-  # Subversion has a .svn in all working directories.
-  if os.path.isdir('.svn'):
-    logging.info("Guessed VCS = Subversion")
-    return SubversionVCS(options)
-
-  # Git has a command to test if you're in a git tree.
-  # Try running it, but don't die if we don't have git installed.
-  try:
-    out, returncode = RunShellWithReturnCode(["git", "rev-parse",
-                                              "--is-inside-work-tree"])
-    if returncode == 0:
-      return GitVCS(options)
-  except OSError, (errno, message):
-    if errno != 2:  # ENOENT -- they don't have git installed.
-      raise
-
-  ErrorExit(("Could not guess version control system. "
-             "Are you in a working copy directory?"))
-
-
-def RealMain(argv, data=None):
-  """The real main function.
-
-  Args:
-    argv: Command line arguments.
-    data: Diff contents. If None (default) the diff is generated by
-      the VersionControlSystem implementation returned by GuessVCS().
-
-  Returns:
-    A 2-tuple (issue id, patchset id).
-    The patchset id is None if the base files are not uploaded by this
-    script (applies only to SVN checkouts).
-  """
-  logging.basicConfig(format=("%(asctime).19s %(levelname)s %(filename)s:"
-                              "%(lineno)s %(message)s "))
-  os.environ['LC_ALL'] = 'C'
-  options, args = parser.parse_args(argv[1:])
-  global verbosity
-  verbosity = options.verbose
-  if verbosity >= 3:
-    logging.getLogger().setLevel(logging.DEBUG)
-  elif verbosity >= 2:
-    logging.getLogger().setLevel(logging.INFO)
-  vcs = GuessVCS(options)
-  if isinstance(vcs, SubversionVCS):
-    # base field is only allowed for Subversion.
-    # Note: Fetching base files may become deprecated in future releases.
-    base = vcs.GuessBase(options.download_base)
-  else:
-    base = None
-  if not base and options.download_base:
-    options.download_base = True
-    logging.info("Enabled upload of base file")
-  if not options.assume_yes:
-    vcs.CheckForUnknownFiles()
-  if data is None:
-    data = vcs.GenerateDiff(args)
-  files = vcs.GetBaseFiles(data)
-  if verbosity >= 1:
-    print "Upload server:", options.server, "(change with -s/--server)"
-  if options.issue:
-    prompt = "Message describing this patch set: "
-  else:
-    prompt = "New issue subject: "
-  message = options.message or raw_input(prompt).strip()
-  if not message:
-    ErrorExit("A non-empty message is required")
-  rpc_server = GetRpcServer(options)
-  form_fields = [("subject", message)]
-  if base:
-    form_fields.append(("base", base))
-  if options.issue:
-    form_fields.append(("issue", str(options.issue)))
-  if options.email:
-    form_fields.append(("user", options.email))
-  if options.reviewers:
-    for reviewer in options.reviewers.split(','):
-      if "@" in reviewer and not reviewer.split("@")[1].count(".") == 1:
-        ErrorExit("Invalid email address: %s" % reviewer)
-    form_fields.append(("reviewers", options.reviewers))
-  if options.cc:
-    for cc in options.cc.split(','):
-      if "@" in cc and not cc.split("@")[1].count(".") == 1:
-        ErrorExit("Invalid email address: %s" % cc)
-    form_fields.append(("cc", options.cc))
-  description = options.description
-  if options.description_file:
-    if options.description:
-      ErrorExit("Can't specify description and description_file")
-    file = open(options.description_file, 'r')
-    description = file.read()
-    file.close()
-  if description:
-    form_fields.append(("description", description))
-  # Send a hash of all the base file so the server can determine if a copy
-  # already exists in an earlier patchset.
-  base_hashes = ""
-  for file, info in files.iteritems():
-    if not info[0] is None:
-      checksum = md5.new(info[0]).hexdigest()
-      if base_hashes:
-        base_hashes += "|"
-      base_hashes += checksum + ":" + file
-  form_fields.append(("base_hashes", base_hashes))
-  # If we're uploading base files, don't send the email before the uploads, so
-  # that it contains the file status.
-  if options.send_mail and options.download_base:
-    form_fields.append(("send_mail", "1"))
-  if not options.download_base:
-    form_fields.append(("content_upload", "1"))
-  if len(data) > MAX_UPLOAD_SIZE:
-    print "Patch is large, so uploading file patches separately."
-    uploaded_diff_file = []
-    form_fields.append(("separate_patches", "1"))
-  else:
-    uploaded_diff_file = [("data", "data.diff", data)]
-  ctype, body = EncodeMultipartFormData(form_fields, uploaded_diff_file)
-  response_body = rpc_server.Send("/upload", body, content_type=ctype)
-  patchset = None
-  if not options.download_base or not uploaded_diff_file:
-    lines = response_body.splitlines()
-    if len(lines) >= 2:
-      msg = lines[0]
-      patchset = lines[1].strip()
-      patches = [x.split(" ", 1) for x in lines[2:]]
-    else:
-      msg = response_body
-  else:
-    msg = response_body
-  StatusUpdate(msg)
-  if not response_body.startswith("Issue created.") and \
-  not response_body.startswith("Issue updated."):
-    sys.exit(0)
-  issue = msg[msg.rfind("/")+1:]
-
-  if not uploaded_diff_file:
-    result = UploadSeparatePatches(issue, rpc_server, patchset, data, options)
-    if not options.download_base:
-      patches = result
-
-  if not options.download_base:
-    vcs.UploadBaseFiles(issue, rpc_server, patches, patchset, options, files)
-    if options.send_mail:
-      rpc_server.Send("/" + issue + "/mail", payload="")
-  return issue, patchset
-
-
-def main():
-  try:
-    RealMain(sys.argv)
-  except KeyboardInterrupt:
-    print
-    StatusUpdate("Interrupted.")
-    sys.exit(1)
-
-
-if __name__ == "__main__":
-  main()
diff --git a/third_party/googletest/googletest/scripts/upload_gtest.py b/third_party/googletest/googletest/scripts/upload_gtest.py
deleted file mode 100755
index be19ae8..0000000
--- a/third_party/googletest/googletest/scripts/upload_gtest.py
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""upload_gtest.py v0.1.0 -- uploads a Google Test patch for review.
-
-This simple wrapper passes all command line flags and
---cc=googletestframework@googlegroups.com to upload.py.
-
-USAGE: upload_gtest.py [options for upload.py]
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import sys
-
-CC_FLAG = '--cc='
-GTEST_GROUP = 'googletestframework@googlegroups.com'
-
-
-def main():
-  # Finds the path to upload.py, assuming it is in the same directory
-  # as this file.
-  my_dir = os.path.dirname(os.path.abspath(__file__))
-  upload_py_path = os.path.join(my_dir, 'upload.py')
-
-  # Adds Google Test discussion group to the cc line if it's not there
-  # already.
-  upload_py_argv = [upload_py_path]
-  found_cc_flag = False
-  for arg in sys.argv[1:]:
-    if arg.startswith(CC_FLAG):
-      found_cc_flag = True
-      cc_line = arg[len(CC_FLAG):]
-      cc_list = [addr for addr in cc_line.split(',') if addr]
-      if GTEST_GROUP not in cc_list:
-        cc_list.append(GTEST_GROUP)
-      upload_py_argv.append(CC_FLAG + ','.join(cc_list))
-    else:
-      upload_py_argv.append(arg)
-
-  if not found_cc_flag:
-    upload_py_argv.append(CC_FLAG + GTEST_GROUP)
-
-  # Invokes upload.py with the modified command line flags.
-  os.execv(upload_py_path, upload_py_argv)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/third_party/googletest/googletest/src/gtest-all.cc b/third_party/googletest/googletest/src/gtest-all.cc
deleted file mode 100644
index ad29290..0000000
--- a/third_party/googletest/googletest/src/gtest-all.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build Google Test by compiling a single file.
-// This file serves this purpose.
-
-// This line ensures that gtest.h can be compiled on its own, even
-// when it's fused.
-#include "gtest/gtest.h"
-
-// The following lines pull in the real gtest *.cc files.
-#include "src/gtest.cc"
-#include "src/gtest-death-test.cc"
-#include "src/gtest-filepath.cc"
-#include "src/gtest-matchers.cc"
-#include "src/gtest-port.cc"
-#include "src/gtest-printers.cc"
-#include "src/gtest-test-part.cc"
-#include "src/gtest-typed-test.cc"
diff --git a/third_party/googletest/googletest/src/gtest-death-test.cc b/third_party/googletest/googletest/src/gtest-death-test.cc
deleted file mode 100644
index d3d5feb..0000000
--- a/third_party/googletest/googletest/src/gtest-death-test.cc
+++ /dev/null
@@ -1,1644 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This file implements death tests.
-
-#include "gtest/gtest-death-test.h"
-
-#include <functional>
-#include <utility>
-
-#include "gtest/internal/gtest-port.h"
-#include "gtest/internal/custom/gtest.h"
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_MAC
-#  include <crt_externs.h>
-# endif  // GTEST_OS_MAC
-
-# include <errno.h>
-# include <fcntl.h>
-# include <limits.h>
-
-# if GTEST_OS_LINUX
-#  include <signal.h>
-# endif  // GTEST_OS_LINUX
-
-# include <stdarg.h>
-
-# if GTEST_OS_WINDOWS
-#  include <windows.h>
-# else
-#  include <sys/mman.h>
-#  include <sys/wait.h>
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_QNX
-#  include <spawn.h>
-# endif  // GTEST_OS_QNX
-
-# if GTEST_OS_FUCHSIA
-#  include <lib/fdio/fd.h>
-#  include <lib/fdio/io.h>
-#  include <lib/fdio/spawn.h>
-#  include <lib/zx/channel.h>
-#  include <lib/zx/port.h>
-#  include <lib/zx/process.h>
-#  include <lib/zx/socket.h>
-#  include <zircon/processargs.h>
-#  include <zircon/syscalls.h>
-#  include <zircon/syscalls/policy.h>
-#  include <zircon/syscalls/port.h>
-# endif  // GTEST_OS_FUCHSIA
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-string.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-// Constants.
-
-// The default death test style.
-//
-// This is defined in internal/gtest-port.h as "fast", but can be overridden by
-// a definition in internal/custom/gtest-port.h. The recommended value, which is
-// used internally at Google, is "threadsafe".
-static const char kDefaultDeathTestStyle[] = GTEST_DEFAULT_DEATH_TEST_STYLE;
-
-GTEST_DEFINE_string_(
-    death_test_style,
-    internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle),
-    "Indicates how to run a death test in a forked child process: "
-    "\"threadsafe\" (child process re-executes the test binary "
-    "from the beginning, running only the specific death test) or "
-    "\"fast\" (child process runs the death test immediately "
-    "after forking).");
-
-GTEST_DEFINE_bool_(
-    death_test_use_fork,
-    internal::BoolFromGTestEnv("death_test_use_fork", false),
-    "Instructs to use fork()/_exit() instead of clone() in death tests. "
-    "Ignored and always uses fork() on POSIX systems where clone() is not "
-    "implemented. Useful when running under valgrind or similar tools if "
-    "those do not support clone(). Valgrind 3.3.1 will just fail if "
-    "it sees an unsupported combination of clone() flags. "
-    "It is not recommended to use this flag w/o valgrind though it will "
-    "work in 99% of the cases. Once valgrind is fixed, this flag will "
-    "most likely be removed.");
-
-namespace internal {
-GTEST_DEFINE_string_(
-    internal_run_death_test, "",
-    "Indicates the file, line number, temporal index of "
-    "the single death test to run, and a file descriptor to "
-    "which a success code may be sent, all separated by "
-    "the '|' characters.  This flag is specified if and only if the "
-    "current process is a sub-process launched for running a thread-safe "
-    "death test.  FOR INTERNAL USE ONLY.");
-}  // namespace internal
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Valid only for fast death tests. Indicates the code is running in the
-// child process of a fast style death test.
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-static bool g_in_fast_death_test_child = false;
-# endif
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-bool InDeathTestChild() {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  // On Windows and Fuchsia, death tests are thread-safe regardless of the value
-  // of the death_test_style flag.
-  return !GTEST_FLAG(internal_run_death_test).empty();
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe")
-    return !GTEST_FLAG(internal_run_death_test).empty();
-  else
-    return g_in_fast_death_test_child;
-#endif
-}
-
-}  // namespace internal
-
-// ExitedWithCode constructor.
-ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
-}
-
-// ExitedWithCode function-call operator.
-bool ExitedWithCode::operator()(int exit_status) const {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return exit_status == exit_code_;
-
-# else
-
-  return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// KilledBySignal constructor.
-KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
-}
-
-// KilledBySignal function-call operator.
-bool KilledBySignal::operator()(int exit_status) const {
-#  if defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  {
-    bool result;
-    if (GTEST_KILLED_BY_SIGNAL_OVERRIDE_(signum_, exit_status, &result)) {
-      return result;
-    }
-  }
-#  endif  // defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-namespace internal {
-
-// Utilities needed for death tests.
-
-// Generates a textual description of a given exit code, in the format
-// specified by wait(2).
-static std::string ExitSummary(int exit_code) {
-  Message m;
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  m << "Exited with exit status " << exit_code;
-
-# else
-
-  if (WIFEXITED(exit_code)) {
-    m << "Exited with exit status " << WEXITSTATUS(exit_code);
-  } else if (WIFSIGNALED(exit_code)) {
-    m << "Terminated by signal " << WTERMSIG(exit_code);
-  }
-#  ifdef WCOREDUMP
-  if (WCOREDUMP(exit_code)) {
-    m << " (core dumped)";
-  }
-#  endif
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return m.GetString();
-}
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-bool ExitedUnsuccessfully(int exit_status) {
-  return !ExitedWithCode(0)(exit_status);
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Generates a textual failure message when a death test finds more than
-// one thread running, or cannot determine the number of threads, prior
-// to executing the given statement.  It is the responsibility of the
-// caller not to pass a thread_count of 1.
-static std::string DeathTestThreadWarning(size_t thread_count) {
-  Message msg;
-  msg << "Death tests use fork(), which is unsafe particularly"
-      << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
-  if (thread_count == 0) {
-    msg << "couldn't detect the number of threads.";
-  } else {
-    msg << "detected " << thread_count << " threads.";
-  }
-  msg << " See "
-         "https://github.com/google/googletest/blob/master/docs/"
-         "advanced.md#death-tests-and-threads"
-      << " for more explanation and suggested solutions, especially if"
-      << " this is the last message you see before your test times out.";
-  return msg.GetString();
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-// Flag characters for reporting a death test that did not die.
-static const char kDeathTestLived = 'L';
-static const char kDeathTestReturned = 'R';
-static const char kDeathTestThrew = 'T';
-static const char kDeathTestInternalError = 'I';
-
-#if GTEST_OS_FUCHSIA
-
-// File descriptor used for the pipe in the child process.
-static const int kFuchsiaReadPipeFd = 3;
-
-#endif
-
-// An enumeration describing all of the possible ways that a death test can
-// conclude.  DIED means that the process died while executing the test
-// code; LIVED means that process lived beyond the end of the test code;
-// RETURNED means that the test statement attempted to execute a return
-// statement, which is not allowed; THREW means that the test statement
-// returned control by throwing an exception.  IN_PROGRESS means the test
-// has not yet concluded.
-enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW };
-
-// Routine for aborting the program which is safe to call from an
-// exec-style death test child process, in which case the error
-// message is propagated back to the parent process.  Otherwise, the
-// message is simply printed to stderr.  In either case, the program
-// then exits with status 1.
-static void DeathTestAbort(const std::string& message) {
-  // On a POSIX system, this function may be called from a threadsafe-style
-  // death test child process, which operates on a very small stack.  Use
-  // the heap for any additional non-minuscule memory requirements.
-  const InternalRunDeathTestFlag* const flag =
-      GetUnitTestImpl()->internal_run_death_test_flag();
-  if (flag != nullptr) {
-    FILE* parent = posix::FDOpen(flag->write_fd(), "w");
-    fputc(kDeathTestInternalError, parent);
-    fprintf(parent, "%s", message.c_str());
-    fflush(parent);
-    _exit(1);
-  } else {
-    fprintf(stderr, "%s", message.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// A replacement for CHECK that calls DeathTestAbort if the assertion
-// fails.
-# define GTEST_DEATH_TEST_CHECK_(expression) \
-  do { \
-    if (!::testing::internal::IsTrue(expression)) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ +  ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for
-// evaluating any system call that fulfills two conditions: it must return
-// -1 on failure, and set errno to EINTR when it is interrupted and
-// should be tried again.  The macro expands to a loop that repeatedly
-// evaluates the expression as long as it evaluates to -1 and sets
-// errno to EINTR.  If the expression evaluates to -1 but errno is
-// something other than EINTR, DeathTestAbort is called.
-# define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
-  do { \
-    int gtest_retval; \
-    do { \
-      gtest_retval = (expression); \
-    } while (gtest_retval == -1 && errno == EINTR); \
-    if (gtest_retval == -1) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ + ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression + " != -1"); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// Returns the message describing the last system error in errno.
-std::string GetLastErrnoDescription() {
-    return errno == 0 ? "" : posix::StrError(errno);
-}
-
-// This is called from a death test parent process to read a failure
-// message from the death test child process and log it with the FATAL
-// severity. On Windows, the message is read from a pipe handle. On other
-// platforms, it is read from a file descriptor.
-static void FailFromInternalError(int fd) {
-  Message error;
-  char buffer[256];
-  int num_read;
-
-  do {
-    while ((num_read = posix::Read(fd, buffer, 255)) > 0) {
-      buffer[num_read] = '\0';
-      error << buffer;
-    }
-  } while (num_read == -1 && errno == EINTR);
-
-  if (num_read == 0) {
-    GTEST_LOG_(FATAL) << error.GetString();
-  } else {
-    const int last_error = errno;
-    GTEST_LOG_(FATAL) << "Error while reading death test internal: "
-                      << GetLastErrnoDescription() << " [" << last_error << "]";
-  }
-}
-
-// Death test constructor.  Increments the running death test count
-// for the current test.
-DeathTest::DeathTest() {
-  TestInfo* const info = GetUnitTestImpl()->current_test_info();
-  if (info == nullptr) {
-    DeathTestAbort("Cannot run a death test outside of a TEST or "
-                   "TEST_F construct");
-  }
-}
-
-// Creates and returns a death test by dispatching to the current
-// death test factory.
-bool DeathTest::Create(const char* statement,
-                       Matcher<const std::string&> matcher, const char* file,
-                       int line, DeathTest** test) {
-  return GetUnitTestImpl()->death_test_factory()->Create(
-      statement, std::move(matcher), file, line, test);
-}
-
-const char* DeathTest::LastMessage() {
-  return last_death_test_message_.c_str();
-}
-
-void DeathTest::set_last_death_test_message(const std::string& message) {
-  last_death_test_message_ = message;
-}
-
-std::string DeathTest::last_death_test_message_;
-
-// Provides cross platform implementation for some death functionality.
-class DeathTestImpl : public DeathTest {
- protected:
-  DeathTestImpl(const char* a_statement, Matcher<const std::string&> matcher)
-      : statement_(a_statement),
-        matcher_(std::move(matcher)),
-        spawned_(false),
-        status_(-1),
-        outcome_(IN_PROGRESS),
-        read_fd_(-1),
-        write_fd_(-1) {}
-
-  // read_fd_ is expected to be closed and cleared by a derived class.
-  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
-
-  void Abort(AbortReason reason) override;
-  bool Passed(bool status_ok) override;
-
-  const char* statement() const { return statement_; }
-  bool spawned() const { return spawned_; }
-  void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
-  int status() const { return status_; }
-  void set_status(int a_status) { status_ = a_status; }
-  DeathTestOutcome outcome() const { return outcome_; }
-  void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
-  int read_fd() const { return read_fd_; }
-  void set_read_fd(int fd) { read_fd_ = fd; }
-  int write_fd() const { return write_fd_; }
-  void set_write_fd(int fd) { write_fd_ = fd; }
-
-  // Called in the parent process only. Reads the result code of the death
-  // test child process via a pipe, interprets it to set the outcome_
-  // member, and closes read_fd_.  Outputs diagnostics and terminates in
-  // case of unexpected codes.
-  void ReadAndInterpretStatusByte();
-
-  // Returns stderr output from the child process.
-  virtual std::string GetErrorLogs();
-
- private:
-  // The textual content of the code this object is testing.  This class
-  // doesn't own this string and should not attempt to delete it.
-  const char* const statement_;
-  // A matcher that's expected to match the stderr output by the child process.
-  Matcher<const std::string&> matcher_;
-  // True if the death test child process has been successfully spawned.
-  bool spawned_;
-  // The exit status of the child process.
-  int status_;
-  // How the death test concluded.
-  DeathTestOutcome outcome_;
-  // Descriptor to the read end of the pipe to the child process.  It is
-  // always -1 in the child process.  The child keeps its write end of the
-  // pipe in write_fd_.
-  int read_fd_;
-  // Descriptor to the child's write end of the pipe to the parent process.
-  // It is always -1 in the parent process.  The parent keeps its end of the
-  // pipe in read_fd_.
-  int write_fd_;
-};
-
-// Called in the parent process only. Reads the result code of the death
-// test child process via a pipe, interprets it to set the outcome_
-// member, and closes read_fd_.  Outputs diagnostics and terminates in
-// case of unexpected codes.
-void DeathTestImpl::ReadAndInterpretStatusByte() {
-  char flag;
-  int bytes_read;
-
-  // The read() here blocks until data is available (signifying the
-  // failure of the death test) or until the pipe is closed (signifying
-  // its success), so it's okay to call this in the parent before
-  // the child process has exited.
-  do {
-    bytes_read = posix::Read(read_fd(), &flag, 1);
-  } while (bytes_read == -1 && errno == EINTR);
-
-  if (bytes_read == 0) {
-    set_outcome(DIED);
-  } else if (bytes_read == 1) {
-    switch (flag) {
-      case kDeathTestReturned:
-        set_outcome(RETURNED);
-        break;
-      case kDeathTestThrew:
-        set_outcome(THREW);
-        break;
-      case kDeathTestLived:
-        set_outcome(LIVED);
-        break;
-      case kDeathTestInternalError:
-        FailFromInternalError(read_fd());  // Does not return.
-        break;
-      default:
-        GTEST_LOG_(FATAL) << "Death test child process reported "
-                          << "unexpected status byte ("
-                          << static_cast<unsigned int>(flag) << ")";
-    }
-  } else {
-    GTEST_LOG_(FATAL) << "Read from death test child process failed: "
-                      << GetLastErrnoDescription();
-  }
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd()));
-  set_read_fd(-1);
-}
-
-std::string DeathTestImpl::GetErrorLogs() {
-  return GetCapturedStderr();
-}
-
-// Signals that the death test code which should have exited, didn't.
-// Should be called only in a death test child process.
-// Writes a status byte to the child's status file descriptor, then
-// calls _exit(1).
-void DeathTestImpl::Abort(AbortReason reason) {
-  // The parent process considers the death test to be a failure if
-  // it finds any data in our pipe.  So, here we write a single flag byte
-  // to the pipe, then exit.
-  const char status_ch =
-      reason == TEST_DID_NOT_DIE ? kDeathTestLived :
-      reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned;
-
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1));
-  // We are leaking the descriptor here because on some platforms (i.e.,
-  // when built as Windows DLL), destructors of global objects will still
-  // run after calling _exit(). On such systems, write_fd_ will be
-  // indirectly closed from the destructor of UnitTestImpl, causing double
-  // close if it is also closed here. On debug configurations, double close
-  // may assert. As there are no in-process buffers to flush here, we are
-  // relying on the OS to close the descriptor after the process terminates
-  // when the destructors are not run.
-  _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
-}
-
-// Returns an indented copy of stderr output for a death test.
-// This makes distinguishing death test output lines from regular log lines
-// much easier.
-static ::std::string FormatDeathTestOutput(const ::std::string& output) {
-  ::std::string ret;
-  for (size_t at = 0; ; ) {
-    const size_t line_end = output.find('\n', at);
-    ret += "[  DEATH   ] ";
-    if (line_end == ::std::string::npos) {
-      ret += output.substr(at);
-      break;
-    }
-    ret += output.substr(at, line_end + 1 - at);
-    at = line_end + 1;
-  }
-  return ret;
-}
-
-// Assesses the success or failure of a death test, using both private
-// members which have previously been set, and one argument:
-//
-// Private data members:
-//   outcome:  An enumeration describing how the death test
-//             concluded: DIED, LIVED, THREW, or RETURNED.  The death test
-//             fails in the latter three cases.
-//   status:   The exit status of the child process. On *nix, it is in the
-//             in the format specified by wait(2). On Windows, this is the
-//             value supplied to the ExitProcess() API or a numeric code
-//             of the exception that terminated the program.
-//   matcher_: A matcher that's expected to match the stderr output by the child
-//             process.
-//
-// Argument:
-//   status_ok: true if exit_status is acceptable in the context of
-//              this particular death test, which fails if it is false
-//
-// Returns true if and only if all of the above conditions are met.  Otherwise,
-// the first failing condition, in the order given above, is the one that is
-// reported. Also sets the last death test message string.
-bool DeathTestImpl::Passed(bool status_ok) {
-  if (!spawned())
-    return false;
-
-  const std::string error_message = GetErrorLogs();
-
-  bool success = false;
-  Message buffer;
-
-  buffer << "Death test: " << statement() << "\n";
-  switch (outcome()) {
-    case LIVED:
-      buffer << "    Result: failed to die.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case THREW:
-      buffer << "    Result: threw an exception.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case RETURNED:
-      buffer << "    Result: illegal return in test statement.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case DIED:
-      if (status_ok) {
-        if (matcher_.Matches(error_message)) {
-          success = true;
-        } else {
-          std::ostringstream stream;
-          matcher_.DescribeTo(&stream);
-          buffer << "    Result: died but not with expected error.\n"
-                 << "  Expected: " << stream.str() << "\n"
-                 << "Actual msg:\n"
-                 << FormatDeathTestOutput(error_message);
-        }
-      } else {
-        buffer << "    Result: died but not with expected exit code:\n"
-               << "            " << ExitSummary(status()) << "\n"
-               << "Actual msg:\n" << FormatDeathTestOutput(error_message);
-      }
-      break;
-    case IN_PROGRESS:
-    default:
-      GTEST_LOG_(FATAL)
-          << "DeathTest::Passed somehow called before conclusion of test";
-  }
-
-  DeathTest::set_last_death_test_message(buffer.GetString());
-  return success;
-}
-
-# if GTEST_OS_WINDOWS
-// WindowsDeathTest implements death tests on Windows. Due to the
-// specifics of starting new processes on Windows, death tests there are
-// always threadsafe, and Google Test considers the
-// --gtest_death_test_style=fast setting to be equivalent to
-// --gtest_death_test_style=threadsafe there.
-//
-// A few implementation notes:  Like the Linux version, the Windows
-// implementation uses pipes for child-to-parent communication. But due to
-// the specifics of pipes on Windows, some extra steps are required:
-//
-// 1. The parent creates a communication pipe and stores handles to both
-//    ends of it.
-// 2. The parent starts the child and provides it with the information
-//    necessary to acquire the handle to the write end of the pipe.
-// 3. The child acquires the write end of the pipe and signals the parent
-//    using a Windows event.
-// 4. Now the parent can release the write end of the pipe on its side. If
-//    this is done before step 3, the object's reference count goes down to
-//    0 and it is destroyed, preventing the child from acquiring it. The
-//    parent now has to release it, or read operations on the read end of
-//    the pipe will not return when the child terminates.
-// 5. The parent reads child's output through the pipe (outcome code and
-//    any possible error messages) from the pipe, and its stderr and then
-//    determines whether to fail the test.
-//
-// Note: to distinguish Win32 API calls from the local method and function
-// calls, the former are explicitly resolved in the global namespace.
-//
-class WindowsDeathTest : public DeathTestImpl {
- public:
-  WindowsDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  virtual int Wait();
-  virtual TestRole AssumeRole();
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // Handle to the write end of the pipe to the child process.
-  AutoHandle write_handle_;
-  // Child process handle.
-  AutoHandle child_handle_;
-  // Event the child process uses to signal the parent that it has
-  // acquired the handle to the write end of the pipe. After seeing this
-  // event the parent can release its own handles to make sure its
-  // ReadFile() calls return when the child terminates.
-  AutoHandle event_handle_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int WindowsDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  // Wait until the child either signals that it has acquired the write end
-  // of the pipe or it dies.
-  const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
-  switch (::WaitForMultipleObjects(2,
-                                   wait_handles,
-                                   FALSE,  // Waits for any of the handles.
-                                   INFINITE)) {
-    case WAIT_OBJECT_0:
-    case WAIT_OBJECT_0 + 1:
-      break;
-    default:
-      GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
-  }
-
-  // The child has acquired the write end of the pipe or exited.
-  // We release the handle on our side and continue.
-  write_handle_.Reset();
-  event_handle_.Reset();
-
-  ReadAndInterpretStatusByte();
-
-  // Waits for the child process to exit if it haven't already. This
-  // returns immediately if the child has already exited, regardless of
-  // whether previous calls to WaitForMultipleObjects synchronized on this
-  // handle or not.
-  GTEST_DEATH_TEST_CHECK_(
-      WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
-                                             INFINITE));
-  DWORD status_code;
-  GTEST_DEATH_TEST_CHECK_(
-      ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE);
-  child_handle_.Reset();
-  set_status(static_cast<int>(status_code));
-  return status();
-}
-
-// The AssumeRole process for a Windows death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole WindowsDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  // WindowsDeathTest uses an anonymous pipe to communicate results of
-  // a death test.
-  SECURITY_ATTRIBUTES handles_are_inheritable = {sizeof(SECURITY_ATTRIBUTES),
-                                                 nullptr, TRUE};
-  HANDLE read_handle, write_handle;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable,
-                   0)  // Default buffer size.
-      != FALSE);
-  set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle),
-                                O_RDONLY));
-  write_handle_.Reset(write_handle);
-  event_handle_.Reset(::CreateEvent(
-      &handles_are_inheritable,
-      TRUE,       // The event will automatically reset to non-signaled state.
-      FALSE,      // The initial state is non-signalled.
-      nullptr));  // The even is unnamed.
-  GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != nullptr);
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag +
-      "=" + file_ + "|" + StreamableToString(line_) + "|" +
-      StreamableToString(death_test_index) + "|" +
-      StreamableToString(static_cast<unsigned int>(::GetCurrentProcessId())) +
-      // size_t has the same width as pointers on both 32-bit and 64-bit
-      // Windows platforms.
-      // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
-      "|" + StreamableToString(reinterpret_cast<size_t>(write_handle)) +
-      "|" + StreamableToString(reinterpret_cast<size_t>(event_handle_.Get()));
-
-  char executable_path[_MAX_PATH + 1];  // NOLINT
-  GTEST_DEATH_TEST_CHECK_(_MAX_PATH + 1 != ::GetModuleFileNameA(nullptr,
-                                                                executable_path,
-                                                                _MAX_PATH));
-
-  std::string command_line =
-      std::string(::GetCommandLineA()) + " " + filter_flag + " \"" +
-      internal_flag + "\"";
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // The child process will share the standard handles with the parent.
-  STARTUPINFOA startup_info;
-  memset(&startup_info, 0, sizeof(STARTUPINFO));
-  startup_info.dwFlags = STARTF_USESTDHANDLES;
-  startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
-  startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
-  startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
-
-  PROCESS_INFORMATION process_info;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreateProcessA(
-          executable_path, const_cast<char*>(command_line.c_str()),
-          nullptr,  // Retuned process handle is not inheritable.
-          nullptr,  // Retuned thread handle is not inheritable.
-          TRUE,  // Child inherits all inheritable handles (for write_handle_).
-          0x0,   // Default creation flags.
-          nullptr,  // Inherit the parent's environment.
-          UnitTest::GetInstance()->original_working_dir(), &startup_info,
-          &process_info) != FALSE);
-  child_handle_.Reset(process_info.hProcess);
-  ::CloseHandle(process_info.hThread);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# elif GTEST_OS_FUCHSIA
-
-class FuchsiaDeathTest : public DeathTestImpl {
- public:
-  FuchsiaDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-  TestRole AssumeRole() override;
-  std::string GetErrorLogs() override;
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // The stderr data captured by the child process.
-  std::string captured_stderr_;
-
-  zx::process child_process_;
-  zx::channel exception_channel_;
-  zx::socket stderr_socket_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
-  int size() {
-    return static_cast<int>(args_.size()) - 1;
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int FuchsiaDeathTest::Wait() {
-  const int kProcessKey = 0;
-  const int kSocketKey = 1;
-  const int kExceptionKey = 2;
-
-  if (!spawned())
-    return 0;
-
-  // Create a port to wait for socket/task/exception events.
-  zx_status_t status_zx;
-  zx::port port;
-  status_zx = zx::port::create(0, &port);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the child process to terminate.
-  status_zx = child_process_.wait_async(
-      port, kProcessKey, ZX_PROCESS_TERMINATED, 0);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the socket to be readable or closed.
-  status_zx = stderr_socket_.wait_async(
-      port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED, 0);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for an exception.
-  status_zx = exception_channel_.wait_async(
-      port, kExceptionKey, ZX_CHANNEL_READABLE, 0);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  bool process_terminated = false;
-  bool socket_closed = false;
-  do {
-    zx_port_packet_t packet = {};
-    status_zx = port.wait(zx::time::infinite(), &packet);
-    GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-    if (packet.key == kExceptionKey) {
-      // Process encountered an exception. Kill it directly rather than
-      // letting other handlers process the event. We will get a kProcessKey
-      // event when the process actually terminates.
-      status_zx = child_process_.kill();
-      GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-    } else if (packet.key == kProcessKey) {
-      // Process terminated.
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_PROCESS_TERMINATED);
-      process_terminated = true;
-    } else if (packet.key == kSocketKey) {
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      if (packet.signal.observed & ZX_SOCKET_READABLE) {
-        // Read data from the socket.
-        constexpr size_t kBufferSize = 1024;
-        do {
-          size_t old_length = captured_stderr_.length();
-          size_t bytes_read = 0;
-          captured_stderr_.resize(old_length + kBufferSize);
-          status_zx = stderr_socket_.read(
-              0, &captured_stderr_.front() + old_length, kBufferSize,
-              &bytes_read);
-          captured_stderr_.resize(old_length + bytes_read);
-        } while (status_zx == ZX_OK);
-        if (status_zx == ZX_ERR_PEER_CLOSED) {
-          socket_closed = true;
-        } else {
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_ERR_SHOULD_WAIT);
-          status_zx = stderr_socket_.wait_async(
-              port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED, 0);
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-        }
-      } else {
-        GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_SOCKET_PEER_CLOSED);
-        socket_closed = true;
-      }
-    }
-  } while (!process_terminated && !socket_closed);
-
-  ReadAndInterpretStatusByte();
-
-  zx_info_process_v2_t buffer;
-  status_zx = child_process_.get_info(
-      ZX_INFO_PROCESS_V2, &buffer, sizeof(buffer), nullptr, nullptr);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  GTEST_DEATH_TEST_CHECK_(buffer.flags & ZX_INFO_PROCESS_FLAG_EXITED);
-  set_status(static_cast<int>(buffer.return_code));
-  return status();
-}
-
-// The AssumeRole process for a Fuchsia death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(kFuchsiaReadPipeFd);
-    return EXECUTE_TEST;
-  }
-
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // Build the child process command line.
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|"
-      + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index);
-  Arguments args;
-  args.AddArguments(GetInjectableArgvs());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  // Build the pipe for communication with the child.
-  zx_status_t status;
-  zx_handle_t child_pipe_handle;
-  int child_pipe_fd;
-  status = fdio_pipe_half(&child_pipe_fd, &child_pipe_handle);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  set_read_fd(child_pipe_fd);
-
-  // Set the pipe handle for the child.
-  fdio_spawn_action_t spawn_actions[2] = {};
-  fdio_spawn_action_t* add_handle_action = &spawn_actions[0];
-  add_handle_action->action = FDIO_SPAWN_ACTION_ADD_HANDLE;
-  add_handle_action->h.id = PA_HND(PA_FD, kFuchsiaReadPipeFd);
-  add_handle_action->h.handle = child_pipe_handle;
-
-  // Create a socket pair will be used to receive the child process' stderr.
-  zx::socket stderr_producer_socket;
-  status =
-      zx::socket::create(0, &stderr_producer_socket, &stderr_socket_);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-  int stderr_producer_fd = -1;
-  status =
-      fdio_fd_create(stderr_producer_socket.release(), &stderr_producer_fd);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-
-  // Make the stderr socket nonblocking.
-  GTEST_DEATH_TEST_CHECK_(fcntl(stderr_producer_fd, F_SETFL, 0) == 0);
-
-  fdio_spawn_action_t* add_stderr_action = &spawn_actions[1];
-  add_stderr_action->action = FDIO_SPAWN_ACTION_CLONE_FD;
-  add_stderr_action->fd.local_fd = stderr_producer_fd;
-  add_stderr_action->fd.target_fd = STDERR_FILENO;
-
-  // Create a child job.
-  zx_handle_t child_job = ZX_HANDLE_INVALID;
-  status = zx_job_create(zx_job_default(), 0, & child_job);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  zx_policy_basic_t policy;
-  policy.condition = ZX_POL_NEW_ANY;
-  policy.policy = ZX_POL_ACTION_ALLOW;
-  status = zx_job_set_policy(
-      child_job, ZX_JOB_POL_RELATIVE, ZX_JOB_POL_BASIC, &policy, 1);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Create an exception channel attached to the |child_job|, to allow
-  // us to suppress the system default exception handler from firing.
-  status =
-      zx_task_create_exception_channel(
-          child_job, 0, exception_channel_.reset_and_get_address());
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Spawn the child process.
-  status = fdio_spawn_etc(
-      child_job, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(), nullptr,
-      2, spawn_actions, child_process_.reset_and_get_address(), nullptr);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-std::string FuchsiaDeathTest::GetErrorLogs() {
-  return captured_stderr_;
-}
-
-#else  // We are neither on Windows, nor on Fuchsia.
-
-// ForkingDeathTest provides implementations for most of the abstract
-// methods of the DeathTest interface.  Only the AssumeRole method is
-// left undefined.
-class ForkingDeathTest : public DeathTestImpl {
- public:
-  ForkingDeathTest(const char* statement, Matcher<const std::string&> matcher);
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-
- protected:
-  void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
-
- private:
-  // PID of child process during death test; 0 in the child process itself.
-  pid_t child_pid_;
-};
-
-// Constructs a ForkingDeathTest.
-ForkingDeathTest::ForkingDeathTest(const char* a_statement,
-                                   Matcher<const std::string&> matcher)
-    : DeathTestImpl(a_statement, std::move(matcher)), child_pid_(-1) {}
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int ForkingDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  ReadAndInterpretStatusByte();
-
-  int status_value;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0));
-  set_status(status_value);
-  return status_value;
-}
-
-// A concrete death test class that forks, then immediately runs the test
-// in the child process.
-class NoExecDeathTest : public ForkingDeathTest {
- public:
-  NoExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher)
-      : ForkingDeathTest(a_statement, std::move(matcher)) {}
-  TestRole AssumeRole() override;
-};
-
-// The AssumeRole process for a fork-and-run death test.  It implements a
-// straightforward fork, with a simple pipe to transmit the status byte.
-DeathTest::TestRole NoExecDeathTest::AssumeRole() {
-  const size_t thread_count = GetThreadCount();
-  if (thread_count != 1) {
-    GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-
-  DeathTest::set_last_death_test_message("");
-  CaptureStderr();
-  // When we fork the process below, the log file buffers are copied, but the
-  // file descriptors are shared.  We flush all log files here so that closing
-  // the file descriptors in the child process doesn't throw off the
-  // synchronization between descriptors and buffers in the parent process.
-  // This is as close to the fork as possible to avoid a race condition in case
-  // there are multiple threads running before the death test, and another
-  // thread writes to the log file.
-  FlushInfoLog();
-
-  const pid_t child_pid = fork();
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  set_child_pid(child_pid);
-  if (child_pid == 0) {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0]));
-    set_write_fd(pipe_fd[1]);
-    // Redirects all logging to stderr in the child process to prevent
-    // concurrent writes to the log files.  We capture stderr in the parent
-    // process and append the child process' output to a log.
-    LogToStderr();
-    // Event forwarding to the listeners of event listener API mush be shut
-    // down in death test subprocesses.
-    GetUnitTestImpl()->listeners()->SuppressEventForwarding();
-    g_in_fast_death_test_child = true;
-    return EXECUTE_TEST;
-  } else {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-    set_read_fd(pipe_fd[0]);
-    set_spawned(true);
-    return OVERSEE_TEST;
-  }
-}
-
-// A concrete death test class that forks and re-executes the main
-// program from the beginning, with command-line flags set that cause
-// only this specific death test to be run.
-class ExecDeathTest : public ForkingDeathTest {
- public:
-  ExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                const char* file, int line)
-      : ForkingDeathTest(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-  TestRole AssumeRole() override;
-
- private:
-  static ::std::vector<std::string> GetArgvsForDeathTestChildProcess() {
-    ::std::vector<std::string> args = GetInjectableArgvs();
-#  if defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    ::std::vector<std::string> extra_args =
-        GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_();
-    args.insert(args.end(), extra_args.begin(), extra_args.end());
-#  endif  // defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    return args;
-  }
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// A struct that encompasses the arguments to the child process of a
-// threadsafe-style death test process.
-struct ExecDeathTestArgs {
-  char* const* argv;  // Command-line arguments for the child's call to exec
-  int close_fd;       // File descriptor to close; the read end of a pipe
-};
-
-#  if GTEST_OS_QNX
-extern "C" char** environ;
-#  else  // GTEST_OS_QNX
-// The main function for a threadsafe-style death test child process.
-// This function is called in a clone()-ed process and thus must avoid
-// any potentially unsafe operations like malloc or libc functions.
-static int ExecDeathTestChildMain(void* child_arg) {
-  ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd));
-
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  // We can safely call execv() as it's almost a direct system call. We
-  // cannot use execvp() as it's a libc function and thus potentially
-  // unsafe.  Since execv() doesn't search the PATH, the user must
-  // invoke the test program via a valid path that contains at least
-  // one path separator.
-  execv(args->argv[0], args->argv);
-  DeathTestAbort(std::string("execv(") + args->argv[0] + ", ...) in " +
-                 original_dir + " failed: " +
-                 GetLastErrnoDescription());
-  return EXIT_FAILURE;
-}
-#  endif  // GTEST_OS_QNX
-
-#  if GTEST_HAS_CLONE
-// Two utility routines that together determine the direction the stack
-// grows.
-// This could be accomplished more elegantly by a single recursive
-// function, but we want to guard against the unlikely possibility of
-// a smart compiler optimizing the recursion away.
-//
-// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
-// StackLowerThanAddress into StackGrowsDown, which then doesn't give
-// correct answer.
-static void StackLowerThanAddress(const void* ptr,
-                                  bool* result) GTEST_NO_INLINE_;
-// Make sure sanitizers do not tamper with the stack here.
-// Ideally, we want to use `__builtin_frame_address` instead of a local variable
-// address with sanitizer disabled, but it does not work when the
-// compiler optimizes the stack frame out, which happens on PowerPC targets.
-// HWAddressSanitizer add a random tag to the MSB of the local variable address,
-// making comparison result unpredictable.
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static void StackLowerThanAddress(const void* ptr, bool* result) {
-  int dummy = 0;
-  *result = std::less<const void*>()(&dummy, ptr);
-}
-
-// Make sure AddressSanitizer does not tamper with the stack here.
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static bool StackGrowsDown() {
-  int dummy = 0;
-  bool result;
-  StackLowerThanAddress(&dummy, &result);
-  return result;
-}
-#  endif  // GTEST_HAS_CLONE
-
-// Spawns a child process with the same executable as the current process in
-// a thread-safe manner and instructs it to run the death test.  The
-// implementation uses fork(2) + exec.  On systems where clone(2) is
-// available, it is used instead, being slightly more thread-safe.  On QNX,
-// fork supports only single-threaded environments, so this function uses
-// spawn(2) there instead.  The function dies with an error message if
-// anything goes wrong.
-static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) {
-  ExecDeathTestArgs args = { argv, close_fd };
-  pid_t child_pid = -1;
-
-#  if GTEST_OS_QNX
-  // Obtains the current directory and sets it to be closed in the child
-  // process.
-  const int cwd_fd = open(".", O_RDONLY);
-  GTEST_DEATH_TEST_CHECK_(cwd_fd != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(cwd_fd, F_SETFD, FD_CLOEXEC));
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  int fd_flags;
-  // Set close_fd to be closed after spawn.
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fd_flags = fcntl(close_fd, F_GETFD));
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(close_fd, F_SETFD,
-                                        fd_flags | FD_CLOEXEC));
-  struct inheritance inherit = {0};
-  // spawn is a system call.
-  child_pid = spawn(args.argv[0], 0, nullptr, &inherit, args.argv, environ);
-  // Restores the current working directory.
-  GTEST_DEATH_TEST_CHECK_(fchdir(cwd_fd) != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(cwd_fd));
-
-#  else   // GTEST_OS_QNX
-#   if GTEST_OS_LINUX
-  // When a SIGPROF signal is received while fork() or clone() are executing,
-  // the process may hang. To avoid this, we ignore SIGPROF here and re-enable
-  // it after the call to fork()/clone() is complete.
-  struct sigaction saved_sigprof_action;
-  struct sigaction ignore_sigprof_action;
-  memset(&ignore_sigprof_action, 0, sizeof(ignore_sigprof_action));
-  sigemptyset(&ignore_sigprof_action.sa_mask);
-  ignore_sigprof_action.sa_handler = SIG_IGN;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(sigaction(
-      SIGPROF, &ignore_sigprof_action, &saved_sigprof_action));
-#   endif  // GTEST_OS_LINUX
-
-#   if GTEST_HAS_CLONE
-  const bool use_fork = GTEST_FLAG(death_test_use_fork);
-
-  if (!use_fork) {
-    static const bool stack_grows_down = StackGrowsDown();
-    const auto stack_size = static_cast<size_t>(getpagesize() * 2);
-    // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
-    void* const stack = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE,
-                             MAP_ANON | MAP_PRIVATE, -1, 0);
-    GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
-
-    // Maximum stack alignment in bytes:  For a downward-growing stack, this
-    // amount is subtracted from size of the stack space to get an address
-    // that is within the stack space and is aligned on all systems we care
-    // about.  As far as I know there is no ABI with stack alignment greater
-    // than 64.  We assume stack and stack_size already have alignment of
-    // kMaxStackAlignment.
-    const size_t kMaxStackAlignment = 64;
-    void* const stack_top =
-        static_cast<char*>(stack) +
-            (stack_grows_down ? stack_size - kMaxStackAlignment : 0);
-    GTEST_DEATH_TEST_CHECK_(
-        static_cast<size_t>(stack_size) > kMaxStackAlignment &&
-        reinterpret_cast<uintptr_t>(stack_top) % kMaxStackAlignment == 0);
-
-    child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
-
-    GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
-  }
-#   else
-  const bool use_fork = true;
-#   endif  // GTEST_HAS_CLONE
-
-  if (use_fork && (child_pid = fork()) == 0) {
-      ExecDeathTestChildMain(&args);
-      _exit(0);
-  }
-#  endif  // GTEST_OS_QNX
-#  if GTEST_OS_LINUX
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(
-      sigaction(SIGPROF, &saved_sigprof_action, nullptr));
-#  endif  // GTEST_OS_LINUX
-
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  return child_pid;
-}
-
-// The AssumeRole process for a fork-and-exec death test.  It re-executes the
-// main program from the beginning, setting the --gtest_filter
-// and --gtest_internal_run_death_test flags to cause only the current
-// death test to be re-run.
-DeathTest::TestRole ExecDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-  // Clear the close-on-exec flag on the write end of the pipe, lest
-  // it be closed when the child process does an exec:
-  GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1);
-
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|" + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index) + "|"
-      + StreamableToString(pipe_fd[1]);
-  Arguments args;
-  args.AddArguments(GetArgvsForDeathTestChildProcess());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // See the comment in NoExecDeathTest::AssumeRole for why the next line
-  // is necessary.
-  FlushInfoLog();
-
-  const pid_t child_pid = ExecDeathTestSpawnChild(args.Argv(), pipe_fd[0]);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-  set_child_pid(child_pid);
-  set_read_fd(pipe_fd[0]);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# endif  // !GTEST_OS_WINDOWS
-
-// Creates a concrete DeathTest-derived class that depends on the
-// --gtest_death_test_style flag, and sets the pointer pointed to
-// by the "test" argument to its address.  If the test should be
-// skipped, sets that pointer to NULL.  Returns true, unless the
-// flag is set to an invalid value.
-bool DefaultDeathTestFactory::Create(const char* statement,
-                                     Matcher<const std::string&> matcher,
-                                     const char* file, int line,
-                                     DeathTest** test) {
-  UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const int death_test_index = impl->current_test_info()
-      ->increment_death_test_count();
-
-  if (flag != nullptr) {
-    if (death_test_index > flag->index()) {
-      DeathTest::set_last_death_test_message(
-          "Death test count (" + StreamableToString(death_test_index)
-          + ") somehow exceeded expected maximum ("
-          + StreamableToString(flag->index()) + ")");
-      return false;
-    }
-
-    if (!(flag->file() == file && flag->line() == line &&
-          flag->index() == death_test_index)) {
-      *test = nullptr;
-      return true;
-    }
-  }
-
-# if GTEST_OS_WINDOWS
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new WindowsDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# elif GTEST_OS_FUCHSIA
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new FuchsiaDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe") {
-    *test = new ExecDeathTest(statement, std::move(matcher), file, line);
-  } else if (GTEST_FLAG(death_test_style) == "fast") {
-    *test = new NoExecDeathTest(statement, std::move(matcher));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
-    DeathTest::set_last_death_test_message(
-        "Unknown death test style \"" + GTEST_FLAG(death_test_style)
-        + "\" encountered");
-    return false;
-  }
-
-  return true;
-}
-
-# if GTEST_OS_WINDOWS
-// Recreates the pipe and event handles from the provided parameters,
-// signals the event, and returns a file descriptor wrapped around the pipe
-// handle. This function is called in the child process only.
-static int GetStatusFileDescriptor(unsigned int parent_process_id,
-                            size_t write_handle_as_size_t,
-                            size_t event_handle_as_size_t) {
-  AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
-                                                   FALSE,  // Non-inheritable.
-                                                   parent_process_id));
-  if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
-    DeathTestAbort("Unable to open parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
-
-  const HANDLE write_handle =
-      reinterpret_cast<HANDLE>(write_handle_as_size_t);
-  HANDLE dup_write_handle;
-
-  // The newly initialized handle is accessible only in the parent
-  // process. To obtain one accessible within the child, we need to use
-  // DuplicateHandle.
-  if (!::DuplicateHandle(parent_process_handle.Get(), write_handle,
-                         ::GetCurrentProcess(), &dup_write_handle,
-                         0x0,    // Requested privileges ignored since
-                                 // DUPLICATE_SAME_ACCESS is used.
-                         FALSE,  // Request non-inheritable handler.
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
-  HANDLE dup_event_handle;
-
-  if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
-                         ::GetCurrentProcess(), &dup_event_handle,
-                         0x0,
-                         FALSE,
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the event handle " +
-                   StreamableToString(event_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const int write_fd =
-      ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND);
-  if (write_fd == -1) {
-    DeathTestAbort("Unable to convert pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " to a file descriptor");
-  }
-
-  // Signals the parent that the write end of the pipe has been acquired
-  // so the parent can release its own write end.
-  ::SetEvent(dup_event_handle);
-
-  return write_fd;
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
-  if (GTEST_FLAG(internal_run_death_test) == "") return nullptr;
-
-  // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
-  // can use it here.
-  int line = -1;
-  int index = -1;
-  ::std::vector< ::std::string> fields;
-  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
-  int write_fd = -1;
-
-# if GTEST_OS_WINDOWS
-
-  unsigned int parent_process_id = 0;
-  size_t write_handle_as_size_t = 0;
-  size_t event_handle_as_size_t = 0;
-
-  if (fields.size() != 6
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &parent_process_id)
-      || !ParseNaturalNumber(fields[4], &write_handle_as_size_t)
-      || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: " +
-                   GTEST_FLAG(internal_run_death_test));
-  }
-  write_fd = GetStatusFileDescriptor(parent_process_id,
-                                     write_handle_as_size_t,
-                                     event_handle_as_size_t);
-
-# elif GTEST_OS_FUCHSIA
-
-  if (fields.size() != 3
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# else
-
-  if (fields.size() != 4
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &write_fd)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  return new InternalRunDeathTestFlag(fields[0], line, index, write_fd);
-}
-
-}  // namespace internal
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest-filepath.cc b/third_party/googletest/googletest/src/gtest-filepath.cc
deleted file mode 100644
index 9504f0f..0000000
--- a/third_party/googletest/googletest/src/gtest-filepath.cc
+++ /dev/null
@@ -1,369 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gtest/internal/gtest-filepath.h"
-
-#include <stdlib.h>
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-message.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-# include <io.h>
-#else
-# include <limits.h>
-# include <climits>  // Some Linux distributions define PATH_MAX here.
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-#include "gtest/internal/gtest-string.h"
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_MAX_ _MAX_PATH
-#elif defined(PATH_MAX)
-# define GTEST_PATH_MAX_ PATH_MAX
-#elif defined(_XOPEN_PATH_MAX)
-# define GTEST_PATH_MAX_ _XOPEN_PATH_MAX
-#else
-# define GTEST_PATH_MAX_ _POSIX_PATH_MAX
-#endif  // GTEST_OS_WINDOWS
-
-namespace testing {
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-// On Windows, '\\' is the standard path separator, but many tools and the
-// Windows API also accept '/' as an alternate path separator. Unless otherwise
-// noted, a file path can contain either kind of path separators, or a mixture
-// of them.
-const char kPathSeparator = '\\';
-const char kAlternatePathSeparator = '/';
-const char kAlternatePathSeparatorString[] = "/";
-# if GTEST_OS_WINDOWS_MOBILE
-// Windows CE doesn't have a current directory. You should not use
-// the current directory in tests on Windows CE, but this at least
-// provides a reasonable fallback.
-const char kCurrentDirectoryString[] = "\\";
-// Windows CE doesn't define INVALID_FILE_ATTRIBUTES
-const DWORD kInvalidFileAttributes = 0xffffffff;
-# else
-const char kCurrentDirectoryString[] = ".\\";
-# endif  // GTEST_OS_WINDOWS_MOBILE
-#else
-const char kPathSeparator = '/';
-const char kCurrentDirectoryString[] = "./";
-#endif  // GTEST_OS_WINDOWS
-
-// Returns whether the given character is a valid path separator.
-static bool IsPathSeparator(char c) {
-#if GTEST_HAS_ALT_PATH_SEP_
-  return (c == kPathSeparator) || (c == kAlternatePathSeparator);
-#else
-  return c == kPathSeparator;
-#endif
-}
-
-// Returns the current working directory, or "" if unsuccessful.
-FilePath FilePath::GetCurrentDir() {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE ||         \
-    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_ESP32 || \
-    GTEST_OS_XTENSA
-  // These platforms do not have a current directory, so we just return
-  // something reasonable.
-  return FilePath(kCurrentDirectoryString);
-#elif GTEST_OS_WINDOWS
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
-#else
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  char* result = getcwd(cwd, sizeof(cwd));
-# if GTEST_OS_NACL
-  // getcwd will likely fail in NaCl due to the sandbox, so return something
-  // reasonable. The user may have provided a shim implementation for getcwd,
-  // however, so fallback only when failure is detected.
-  return FilePath(result == nullptr ? kCurrentDirectoryString : cwd);
-# endif  // GTEST_OS_NACL
-  return FilePath(result == nullptr ? "" : cwd);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns a copy of the FilePath with the case-insensitive extension removed.
-// Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-// FilePath("dir/file"). If a case-insensitive extension is not
-// found, returns a copy of the original FilePath.
-FilePath FilePath::RemoveExtension(const char* extension) const {
-  const std::string dot_extension = std::string(".") + extension;
-  if (String::EndsWithCaseInsensitive(pathname_, dot_extension)) {
-    return FilePath(pathname_.substr(
-        0, pathname_.length() - dot_extension.length()));
-  }
-  return *this;
-}
-
-// Returns a pointer to the last occurrence of a valid path separator in
-// the FilePath. On Windows, for example, both '/' and '\' are valid path
-// separators. Returns NULL if no path separator was found.
-const char* FilePath::FindLastPathSeparator() const {
-  const char* const last_sep = strrchr(c_str(), kPathSeparator);
-#if GTEST_HAS_ALT_PATH_SEP_
-  const char* const last_alt_sep = strrchr(c_str(), kAlternatePathSeparator);
-  // Comparing two pointers of which only one is NULL is undefined.
-  if (last_alt_sep != nullptr &&
-      (last_sep == nullptr || last_alt_sep > last_sep)) {
-    return last_alt_sep;
-  }
-#endif
-  return last_sep;
-}
-
-// Returns a copy of the FilePath with the directory part removed.
-// Example: FilePath("path/to/file").RemoveDirectoryName() returns
-// FilePath("file"). If there is no directory part ("just_a_file"), it returns
-// the FilePath unmodified. If there is no file part ("just_a_dir/") it
-// returns an empty FilePath ("").
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveDirectoryName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  return last_sep ? FilePath(last_sep + 1) : *this;
-}
-
-// RemoveFileName returns the directory path with the filename removed.
-// Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-// If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-// FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-// not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveFileName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  std::string dir;
-  if (last_sep) {
-    dir = std::string(c_str(), static_cast<size_t>(last_sep + 1 - c_str()));
-  } else {
-    dir = kCurrentDirectoryString;
-  }
-  return FilePath(dir);
-}
-
-// Helper functions for naming files in a directory for xml output.
-
-// Given directory = "dir", base_name = "test", number = 0,
-// extension = "xml", returns "dir/test.xml". If number is greater
-// than zero (e.g., 12), returns "dir/test_12.xml".
-// On Windows platform, uses \ as the separator rather than /.
-FilePath FilePath::MakeFileName(const FilePath& directory,
-                                const FilePath& base_name,
-                                int number,
-                                const char* extension) {
-  std::string file;
-  if (number == 0) {
-    file = base_name.string() + "." + extension;
-  } else {
-    file = base_name.string() + "_" + StreamableToString(number)
-        + "." + extension;
-  }
-  return ConcatPaths(directory, FilePath(file));
-}
-
-// Given directory = "dir", relative_path = "test.xml", returns "dir/test.xml".
-// On Windows, uses \ as the separator rather than /.
-FilePath FilePath::ConcatPaths(const FilePath& directory,
-                               const FilePath& relative_path) {
-  if (directory.IsEmpty())
-    return relative_path;
-  const FilePath dir(directory.RemoveTrailingPathSeparator());
-  return FilePath(dir.string() + kPathSeparator + relative_path.string());
-}
-
-// Returns true if pathname describes something findable in the file-system,
-// either a file, directory, or whatever.
-bool FilePath::FileOrDirectoryExists() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(pathname_.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  return attributes != kInvalidFileAttributes;
-#else
-  posix::StatStruct file_stat;
-  return posix::Stat(pathname_.c_str(), &file_stat) == 0;
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns true if pathname describes a directory in the file-system
-// that exists.
-bool FilePath::DirectoryExists() const {
-  bool result = false;
-#if GTEST_OS_WINDOWS
-  // Don't strip off trailing separator if path is a root directory on
-  // Windows (like "C:\\").
-  const FilePath& path(IsRootDirectory() ? *this :
-                                           RemoveTrailingPathSeparator());
-#else
-  const FilePath& path(*this);
-#endif
-
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(path.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  if ((attributes != kInvalidFileAttributes) &&
-      (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
-    result = true;
-  }
-#else
-  posix::StatStruct file_stat;
-  result = posix::Stat(path.c_str(), &file_stat) == 0 &&
-      posix::IsDir(file_stat);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  return result;
-}
-
-// Returns true if pathname describes a root directory. (Windows has one
-// root directory per disk drive.)
-bool FilePath::IsRootDirectory() const {
-#if GTEST_OS_WINDOWS
-  return pathname_.length() == 3 && IsAbsolutePath();
-#else
-  return pathname_.length() == 1 && IsPathSeparator(pathname_.c_str()[0]);
-#endif
-}
-
-// Returns true if pathname describes an absolute path.
-bool FilePath::IsAbsolutePath() const {
-  const char* const name = pathname_.c_str();
-#if GTEST_OS_WINDOWS
-  return pathname_.length() >= 3 &&
-     ((name[0] >= 'a' && name[0] <= 'z') ||
-      (name[0] >= 'A' && name[0] <= 'Z')) &&
-     name[1] == ':' &&
-     IsPathSeparator(name[2]);
-#else
-  return IsPathSeparator(name[0]);
-#endif
-}
-
-// Returns a pathname for a file that does not currently exist. The pathname
-// will be directory/base_name.extension or
-// directory/base_name_<number>.extension if directory/base_name.extension
-// already exists. The number will be incremented until a pathname is found
-// that does not already exist.
-// Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-// There could be a race condition if two or more processes are calling this
-// function at the same time -- they could both pick the same filename.
-FilePath FilePath::GenerateUniqueFileName(const FilePath& directory,
-                                          const FilePath& base_name,
-                                          const char* extension) {
-  FilePath full_pathname;
-  int number = 0;
-  do {
-    full_pathname.Set(MakeFileName(directory, base_name, number++, extension));
-  } while (full_pathname.FileOrDirectoryExists());
-  return full_pathname;
-}
-
-// Returns true if FilePath ends with a path separator, which indicates that
-// it is intended to represent a directory. Returns false otherwise.
-// This does NOT check that a directory (or file) actually exists.
-bool FilePath::IsDirectory() const {
-  return !pathname_.empty() &&
-         IsPathSeparator(pathname_.c_str()[pathname_.length() - 1]);
-}
-
-// Create directories so that path exists. Returns true if successful or if
-// the directories already exist; returns false if unable to create directories
-// for any reason.
-bool FilePath::CreateDirectoriesRecursively() const {
-  if (!this->IsDirectory()) {
-    return false;
-  }
-
-  if (pathname_.length() == 0 || this->DirectoryExists()) {
-    return true;
-  }
-
-  const FilePath parent(this->RemoveTrailingPathSeparator().RemoveFileName());
-  return parent.CreateDirectoriesRecursively() && this->CreateFolder();
-}
-
-// Create the directory so that path exists. Returns true if successful or
-// if the directory already exists; returns false if unable to create the
-// directory for any reason, including if the parent directory does not
-// exist. Not named "CreateDirectory" because that's a macro on Windows.
-bool FilePath::CreateFolder() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  FilePath removed_sep(this->RemoveTrailingPathSeparator());
-  LPCWSTR unicode = String::AnsiToUtf16(removed_sep.c_str());
-  int result = CreateDirectory(unicode, nullptr) ? 0 : -1;
-  delete [] unicode;
-#elif GTEST_OS_WINDOWS
-  int result = _mkdir(pathname_.c_str());
-#elif GTEST_OS_ESP8266 || GTEST_OS_XTENSA
-  // do nothing
-  int result = 0;
-#else
-  int result = mkdir(pathname_.c_str(), 0777);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  if (result == -1) {
-    return this->DirectoryExists();  // An error is OK if the directory exists.
-  }
-  return true;  // No error.
-}
-
-// If input name has a trailing separator character, remove it and return the
-// name, otherwise return the name string unmodified.
-// On Windows platform, uses \ as the separator, other platforms use /.
-FilePath FilePath::RemoveTrailingPathSeparator() const {
-  return IsDirectory()
-      ? FilePath(pathname_.substr(0, pathname_.length() - 1))
-      : *this;
-}
-
-// Removes any redundant separators that might be in the pathname.
-// For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-// redundancies that might be in a pathname involving "." or "..".
-void FilePath::Normalize() {
-  auto out = pathname_.begin();
-
-  for (const char character : pathname_) {
-    if (!IsPathSeparator(character)) {
-      *(out++) = character;
-    } else if (out == pathname_.begin() || *std::prev(out) != kPathSeparator) {
-      *(out++) = kPathSeparator;
-    } else {
-      continue;
-    }
-  }
-
-  pathname_.erase(out, pathname_.end());
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest-internal-inl.h b/third_party/googletest/googletest/src/gtest-internal-inl.h
deleted file mode 100644
index 6d8cecb..0000000
--- a/third_party/googletest/googletest/src/gtest-internal-inl.h
+++ /dev/null
@@ -1,1221 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Utility functions and classes used by the Google C++ testing framework.//
-// This file contains purely Google Test's internal implementation.  Please
-// DO NOT #INCLUDE IT IN A USER PROGRAM.
-
-#ifndef GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
-#define GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
-
-#ifndef _WIN32_WCE
-# include <errno.h>
-#endif  // !_WIN32_WCE
-#include <stddef.h>
-#include <stdlib.h>  // For strtoll/_strtoul64/malloc/free.
-#include <string.h>  // For memmove.
-
-#include <algorithm>
-#include <cstdint>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-#endif
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Declares the flags.
-//
-// We don't want the users to modify this flag in the code, but want
-// Google Test's own unit tests to be able to access it. Therefore we
-// declare it here as opposed to in gtest.h.
-GTEST_DECLARE_bool_(death_test_use_fork);
-
-namespace internal {
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-GTEST_API_ extern const TypeId kTestTypeIdInGoogleTest;
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
-const char kBreakOnFailureFlag[] = "break_on_failure";
-const char kCatchExceptionsFlag[] = "catch_exceptions";
-const char kColorFlag[] = "color";
-const char kFailFast[] = "fail_fast";
-const char kFilterFlag[] = "filter";
-const char kListTestsFlag[] = "list_tests";
-const char kOutputFlag[] = "output";
-const char kBriefFlag[] = "brief";
-const char kPrintTimeFlag[] = "print_time";
-const char kPrintUTF8Flag[] = "print_utf8";
-const char kRandomSeedFlag[] = "random_seed";
-const char kRepeatFlag[] = "repeat";
-const char kShuffleFlag[] = "shuffle";
-const char kStackTraceDepthFlag[] = "stack_trace_depth";
-const char kStreamResultToFlag[] = "stream_result_to";
-const char kThrowOnFailureFlag[] = "throw_on_failure";
-const char kFlagfileFlag[] = "flagfile";
-
-// A valid random seed must be in [1, kMaxRandomSeed].
-const int kMaxRandomSeed = 99999;
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-GTEST_API_ extern bool g_help_flag;
-
-// Returns the current time in milliseconds.
-GTEST_API_ TimeInMillis GetTimeInMillis();
-
-// Returns true if and only if Google Test should use colors in the output.
-GTEST_API_ bool ShouldUseColor(bool stdout_is_tty);
-
-// Formats the given time in milliseconds as seconds.
-GTEST_API_ std::string FormatTimeInMillisAsSeconds(TimeInMillis ms);
-
-// Converts the given time in milliseconds to a date string in the ISO 8601
-// format, without the timezone information.  N.B.: due to the use the
-// non-reentrant localtime() function, this function is not thread safe.  Do
-// not use it in any code that can be called from multiple threads.
-GTEST_API_ std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms);
-
-// Parses a string for an Int32 flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-GTEST_API_ bool ParseInt32Flag(
-    const char* str, const char* flag, int32_t* value);
-
-// Returns a random seed in range [1, kMaxRandomSeed] based on the
-// given --gtest_random_seed flag value.
-inline int GetRandomSeedFromFlag(int32_t random_seed_flag) {
-  const unsigned int raw_seed = (random_seed_flag == 0) ?
-      static_cast<unsigned int>(GetTimeInMillis()) :
-      static_cast<unsigned int>(random_seed_flag);
-
-  // Normalizes the actual seed to range [1, kMaxRandomSeed] such that
-  // it's easy to type.
-  const int normalized_seed =
-      static_cast<int>((raw_seed - 1U) %
-                       static_cast<unsigned int>(kMaxRandomSeed)) + 1;
-  return normalized_seed;
-}
-
-// Returns the first valid random seed after 'seed'.  The behavior is
-// undefined if 'seed' is invalid.  The seed after kMaxRandomSeed is
-// considered to be 1.
-inline int GetNextRandomSeed(int seed) {
-  GTEST_CHECK_(1 <= seed && seed <= kMaxRandomSeed)
-      << "Invalid random seed " << seed << " - must be in [1, "
-      << kMaxRandomSeed << "].";
-  const int next_seed = seed + 1;
-  return (next_seed > kMaxRandomSeed) ? 1 : next_seed;
-}
-
-// This class saves the values of all Google Test flags in its c'tor, and
-// restores them in its d'tor.
-class GTestFlagSaver {
- public:
-  // The c'tor.
-  GTestFlagSaver() {
-    also_run_disabled_tests_ = GTEST_FLAG(also_run_disabled_tests);
-    break_on_failure_ = GTEST_FLAG(break_on_failure);
-    catch_exceptions_ = GTEST_FLAG(catch_exceptions);
-    color_ = GTEST_FLAG(color);
-    death_test_style_ = GTEST_FLAG(death_test_style);
-    death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
-    fail_fast_ = GTEST_FLAG(fail_fast);
-    filter_ = GTEST_FLAG(filter);
-    internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
-    list_tests_ = GTEST_FLAG(list_tests);
-    output_ = GTEST_FLAG(output);
-    brief_ = GTEST_FLAG(brief);
-    print_time_ = GTEST_FLAG(print_time);
-    print_utf8_ = GTEST_FLAG(print_utf8);
-    random_seed_ = GTEST_FLAG(random_seed);
-    repeat_ = GTEST_FLAG(repeat);
-    shuffle_ = GTEST_FLAG(shuffle);
-    stack_trace_depth_ = GTEST_FLAG(stack_trace_depth);
-    stream_result_to_ = GTEST_FLAG(stream_result_to);
-    throw_on_failure_ = GTEST_FLAG(throw_on_failure);
-  }
-
-  // The d'tor is not virtual.  DO NOT INHERIT FROM THIS CLASS.
-  ~GTestFlagSaver() {
-    GTEST_FLAG(also_run_disabled_tests) = also_run_disabled_tests_;
-    GTEST_FLAG(break_on_failure) = break_on_failure_;
-    GTEST_FLAG(catch_exceptions) = catch_exceptions_;
-    GTEST_FLAG(color) = color_;
-    GTEST_FLAG(death_test_style) = death_test_style_;
-    GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
-    GTEST_FLAG(filter) = filter_;
-    GTEST_FLAG(fail_fast) = fail_fast_;
-    GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
-    GTEST_FLAG(list_tests) = list_tests_;
-    GTEST_FLAG(output) = output_;
-    GTEST_FLAG(brief) = brief_;
-    GTEST_FLAG(print_time) = print_time_;
-    GTEST_FLAG(print_utf8) = print_utf8_;
-    GTEST_FLAG(random_seed) = random_seed_;
-    GTEST_FLAG(repeat) = repeat_;
-    GTEST_FLAG(shuffle) = shuffle_;
-    GTEST_FLAG(stack_trace_depth) = stack_trace_depth_;
-    GTEST_FLAG(stream_result_to) = stream_result_to_;
-    GTEST_FLAG(throw_on_failure) = throw_on_failure_;
-  }
-
- private:
-  // Fields for saving the original values of flags.
-  bool also_run_disabled_tests_;
-  bool break_on_failure_;
-  bool catch_exceptions_;
-  std::string color_;
-  std::string death_test_style_;
-  bool death_test_use_fork_;
-  bool fail_fast_;
-  std::string filter_;
-  std::string internal_run_death_test_;
-  bool list_tests_;
-  std::string output_;
-  bool brief_;
-  bool print_time_;
-  bool print_utf8_;
-  int32_t random_seed_;
-  int32_t repeat_;
-  bool shuffle_;
-  int32_t stack_trace_depth_;
-  std::string stream_result_to_;
-  bool throw_on_failure_;
-} GTEST_ATTRIBUTE_UNUSED_;
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type UInt32 because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-GTEST_API_ std::string CodePointToUtf8(uint32_t code_point);
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-GTEST_API_ std::string WideStringToUtf8(const wchar_t* str, int num_chars);
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded();
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (e.g., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-GTEST_API_ bool ShouldShard(const char* total_shards_str,
-                            const char* shard_index_str,
-                            bool in_subprocess_for_death_test);
-
-// Parses the environment variable var as a 32-bit integer. If it is unset,
-// returns default_val. If it is not a 32-bit integer, prints an error and
-// and aborts.
-GTEST_API_ int32_t Int32FromEnvOrDie(const char* env_var, int32_t default_val);
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-GTEST_API_ bool ShouldRunTestOnShard(
-    int total_shards, int shard_index, int test_id);
-
-// STL container utilities.
-
-// Returns the number of elements in the given container that satisfy
-// the given predicate.
-template <class Container, typename Predicate>
-inline int CountIf(const Container& c, Predicate predicate) {
-  // Implemented as an explicit loop since std::count_if() in libCstd on
-  // Solaris has a non-standard signature.
-  int count = 0;
-  for (typename Container::const_iterator it = c.begin(); it != c.end(); ++it) {
-    if (predicate(*it))
-      ++count;
-  }
-  return count;
-}
-
-// Applies a function/functor to each element in the container.
-template <class Container, typename Functor>
-void ForEach(const Container& c, Functor functor) {
-  std::for_each(c.begin(), c.end(), functor);
-}
-
-// Returns the i-th element of the vector, or default_value if i is not
-// in range [0, v.size()).
-template <typename E>
-inline E GetElementOr(const std::vector<E>& v, int i, E default_value) {
-  return (i < 0 || i >= static_cast<int>(v.size())) ? default_value
-                                                    : v[static_cast<size_t>(i)];
-}
-
-// Performs an in-place shuffle of a range of the vector's elements.
-// 'begin' and 'end' are element indices as an STL-style range;
-// i.e. [begin, end) are shuffled, where 'end' == size() means to
-// shuffle to the end of the vector.
-template <typename E>
-void ShuffleRange(internal::Random* random, int begin, int end,
-                  std::vector<E>* v) {
-  const int size = static_cast<int>(v->size());
-  GTEST_CHECK_(0 <= begin && begin <= size)
-      << "Invalid shuffle range start " << begin << ": must be in range [0, "
-      << size << "].";
-  GTEST_CHECK_(begin <= end && end <= size)
-      << "Invalid shuffle range finish " << end << ": must be in range ["
-      << begin << ", " << size << "].";
-
-  // Fisher-Yates shuffle, from
-  // http://en.wikipedia.org/wiki/Fisher-Yates_shuffle
-  for (int range_width = end - begin; range_width >= 2; range_width--) {
-    const int last_in_range = begin + range_width - 1;
-    const int selected =
-        begin +
-        static_cast<int>(random->Generate(static_cast<uint32_t>(range_width)));
-    std::swap((*v)[static_cast<size_t>(selected)],
-              (*v)[static_cast<size_t>(last_in_range)]);
-  }
-}
-
-// Performs an in-place shuffle of the vector's elements.
-template <typename E>
-inline void Shuffle(internal::Random* random, std::vector<E>* v) {
-  ShuffleRange(random, 0, static_cast<int>(v->size()), v);
-}
-
-// A function for deleting an object.  Handy for being used as a
-// functor.
-template <typename T>
-static void Delete(T* x) {
-  delete x;
-}
-
-// A predicate that checks the key of a TestProperty against a known key.
-//
-// TestPropertyKeyIs is copyable.
-class TestPropertyKeyIs {
- public:
-  // Constructor.
-  //
-  // TestPropertyKeyIs has NO default constructor.
-  explicit TestPropertyKeyIs(const std::string& key) : key_(key) {}
-
-  // Returns true if and only if the test name of test property matches on key_.
-  bool operator()(const TestProperty& test_property) const {
-    return test_property.key() == key_;
-  }
-
- private:
-  std::string key_;
-};
-
-// Class UnitTestOptions.
-//
-// This class contains functions for processing options the user
-// specifies when running the tests.  It has only static members.
-//
-// In most cases, the user can specify an option using either an
-// environment variable or a command line flag.  E.g. you can set the
-// test filter using either GTEST_FILTER or --gtest_filter.  If both
-// the variable and the flag are present, the latter overrides the
-// former.
-class GTEST_API_ UnitTestOptions {
- public:
-  // Functions for processing the gtest_output flag.
-
-  // Returns the output format, or "" for normal printed output.
-  static std::string GetOutputFormat();
-
-  // Returns the absolute path of the requested output file, or the
-  // default (test_detail.xml in the original working directory) if
-  // none was explicitly specified.
-  static std::string GetAbsolutePathToOutputFile();
-
-  // Functions for processing the gtest_filter flag.
-
-  // Returns true if and only if the user-specified filter matches the test
-  // suite name and the test name.
-  static bool FilterMatchesTest(const std::string& test_suite_name,
-                                const std::string& test_name);
-
-#if GTEST_OS_WINDOWS
-  // Function for supporting the gtest_catch_exception flag.
-
-  // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-  // given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-  // This function is useful as an __except condition.
-  static int GTestShouldProcessSEH(DWORD exception_code);
-#endif  // GTEST_OS_WINDOWS
-
-  // Returns true if "name" matches the ':' separated list of glob-style
-  // filters in "filter".
-  static bool MatchesFilter(const std::string& name, const char* filter);
-};
-
-// Returns the current application's name, removing directory path if that
-// is present.  Used by UnitTestOptions::GetOutputFile.
-GTEST_API_ FilePath GetCurrentExecutableName();
-
-// The role interface for getting the OS stack trace as a string.
-class OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetterInterface() {}
-  virtual ~OsStackTraceGetterInterface() {}
-
-  // Returns the current OS stack trace as an std::string.  Parameters:
-  //
-  //   max_depth  - the maximum number of stack frames to be included
-  //                in the trace.
-  //   skip_count - the number of top frames to be skipped; doesn't count
-  //                against max_depth.
-  virtual std::string CurrentStackTrace(int max_depth, int skip_count) = 0;
-
-  // UponLeavingGTest() should be called immediately before Google Test calls
-  // user code. It saves some information about the current stack that
-  // CurrentStackTrace() will use to find and hide Google Test stack frames.
-  virtual void UponLeavingGTest() = 0;
-
-  // This string is inserted in place of stack frames that are part of
-  // Google Test's implementation.
-  static const char* const kElidedFramesMarker;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
-};
-
-// A working implementation of the OsStackTraceGetterInterface interface.
-class OsStackTraceGetter : public OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetter() {}
-
-  std::string CurrentStackTrace(int max_depth, int skip_count) override;
-  void UponLeavingGTest() override;
-
- private:
-#if GTEST_HAS_ABSL
-  Mutex mutex_;  // Protects all internal state.
-
-  // We save the stack frame below the frame that calls user code.
-  // We do this because the address of the frame immediately below
-  // the user code changes between the call to UponLeavingGTest()
-  // and any calls to the stack trace code from within the user code.
-  void* caller_frame_ = nullptr;
-#endif  // GTEST_HAS_ABSL
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetter);
-};
-
-// Information about a Google Test trace point.
-struct TraceInfo {
-  const char* file;
-  int line;
-  std::string message;
-};
-
-// This is the default global test part result reporter used in UnitTestImpl.
-// This class should only be used by UnitTestImpl.
-class DefaultGlobalTestPartResultReporter
-  : public TestPartResultReporterInterface {
- public:
-  explicit DefaultGlobalTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. Reports the test part
-  // result in the current test.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
-};
-
-// This is the default per thread test part result reporter used in
-// UnitTestImpl. This class should only be used by UnitTestImpl.
-class DefaultPerThreadTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  explicit DefaultPerThreadTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. The implementation just
-  // delegates to the current global test part result reporter of *unit_test_.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
-};
-
-// The private implementation of the UnitTest class.  We don't protect
-// the methods under a mutex, as this class is not accessible by a
-// user and the UnitTest class that delegates work to this class does
-// proper locking.
-class GTEST_API_ UnitTestImpl {
- public:
-  explicit UnitTestImpl(UnitTest* parent);
-  virtual ~UnitTestImpl();
-
-  // There are two different ways to register your own TestPartResultReporter.
-  // You can register your own repoter to listen either only for test results
-  // from the current thread or for results from all threads.
-  // By default, each per-thread test result repoter just passes a new
-  // TestPartResult to the global test result reporter, which registers the
-  // test part result for the currently running test.
-
-  // Returns the global test part result reporter.
-  TestPartResultReporterInterface* GetGlobalTestPartResultReporter();
-
-  // Sets the global test part result reporter.
-  void SetGlobalTestPartResultReporter(
-      TestPartResultReporterInterface* reporter);
-
-  // Returns the test part result reporter for the current thread.
-  TestPartResultReporterInterface* GetTestPartResultReporterForCurrentThread();
-
-  // Sets the test part result reporter for the current thread.
-  void SetTestPartResultReporterForCurrentThread(
-      TestPartResultReporterInterface* reporter);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const {
-    return failed_test_suite_count() > 0 || ad_hoc_test_result()->Failed();
-  }
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(i)];
-  }
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const { return GetTestSuite(i); }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableSuiteCase(int i) {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(index)];
-  }
-
-  // Provides access to the event listener list.
-  TestEventListeners* listeners() { return &listeners_; }
-
-  // Returns the TestResult for the test that's currently running, or
-  // the TestResult for the ad hoc test if no test is running.
-  TestResult* current_test_result();
-
-  // Returns the TestResult for the ad hoc test.
-  const TestResult* ad_hoc_test_result() const { return &ad_hoc_test_result_; }
-
-  // Sets the OS stack trace getter.
-  //
-  // Does nothing if the input and the current OS stack trace getter
-  // are the same; otherwise, deletes the old getter and makes the
-  // input the current getter.
-  void set_os_stack_trace_getter(OsStackTraceGetterInterface* getter);
-
-  // Returns the current OS stack trace getter if it is not NULL;
-  // otherwise, creates an OsStackTraceGetter, makes it the current
-  // getter, and returns it.
-  OsStackTraceGetterInterface* os_stack_trace_getter();
-
-  // Returns the current OS stack trace as an std::string.
-  //
-  // The maximum number of stack frames to be included is specified by
-  // the gtest_stack_trace_depth flag.  The skip_count parameter
-  // specifies the number of top frames to be skipped, which doesn't
-  // count against the number of frames to be included.
-  //
-  // For example, if Foo() calls Bar(), which in turn calls
-  // CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-  // trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-  std::string CurrentOsStackTraceExceptTop(int skip_count) GTEST_NO_INLINE_;
-
-  // Finds and returns a TestSuite with the given name.  If one doesn't
-  // exist, creates one and returns it.
-  //
-  // Arguments:
-  //
-  //   test_suite_name: name of the test suite
-  //   type_param:      the name of the test's type parameter, or NULL if
-  //                    this is not a typed or a type-parameterized test.
-  //   set_up_tc:       pointer to the function that sets up the test suite
-  //   tear_down_tc:    pointer to the function that tears down the test suite
-  TestSuite* GetTestSuite(const char* test_suite_name, const char* type_param,
-                          internal::SetUpTestSuiteFunc set_up_tc,
-                          internal::TearDownTestSuiteFunc tear_down_tc);
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  TestCase* GetTestCase(const char* test_case_name, const char* type_param,
-                        internal::SetUpTestSuiteFunc set_up_tc,
-                        internal::TearDownTestSuiteFunc tear_down_tc) {
-    return GetTestSuite(test_case_name, type_param, set_up_tc, tear_down_tc);
-  }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Adds a TestInfo to the unit test.
-  //
-  // Arguments:
-  //
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  //   test_info:    the TestInfo object
-  void AddTestInfo(internal::SetUpTestSuiteFunc set_up_tc,
-                   internal::TearDownTestSuiteFunc tear_down_tc,
-                   TestInfo* test_info) {
-#if GTEST_HAS_DEATH_TEST
-    // In order to support thread-safe death tests, we need to
-    // remember the original working directory when the test program
-    // was first invoked.  We cannot do this in RUN_ALL_TESTS(), as
-    // the user may have changed the current directory before calling
-    // RUN_ALL_TESTS().  Therefore we capture the current directory in
-    // AddTestInfo(), which is called to register a TEST or TEST_F
-    // before main() is reached.
-    if (original_working_dir_.IsEmpty()) {
-      original_working_dir_.Set(FilePath::GetCurrentDir());
-      GTEST_CHECK_(!original_working_dir_.IsEmpty())
-          << "Failed to get the current working directory.";
-    }
-#endif  // GTEST_HAS_DEATH_TEST
-
-    GetTestSuite(test_info->test_suite_name(), test_info->type_param(),
-                 set_up_tc, tear_down_tc)
-        ->AddTestInfo(test_info);
-  }
-
-  // Returns ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry() {
-    return parameterized_test_registry_;
-  }
-
-  std::set<std::string>* ignored_parameterized_test_suites() {
-    return &ignored_parameterized_test_suites_;
-  }
-
-  // Returns TypeParameterizedTestSuiteRegistry object used to keep track of
-  // type-parameterized tests and instantiations of them.
-  internal::TypeParameterizedTestSuiteRegistry&
-  type_parameterized_test_registry() {
-    return type_parameterized_test_registry_;
-  }
-
-  // Sets the TestSuite object for the test that's currently running.
-  void set_current_test_suite(TestSuite* a_current_test_suite) {
-    current_test_suite_ = a_current_test_suite;
-  }
-
-  // Sets the TestInfo object for the test that's currently running.  If
-  // current_test_info is NULL, the assertion results will be stored in
-  // ad_hoc_test_result_.
-  void set_current_test_info(TestInfo* a_current_test_info) {
-    current_test_info_ = a_current_test_info;
-  }
-
-  // Registers all parameterized tests defined using TEST_P and
-  // INSTANTIATE_TEST_SUITE_P, creating regular tests for each test/parameter
-  // combination. This method can be called more then once; it has guards
-  // protecting from registering the tests more then once.  If
-  // value-parameterized tests are disabled, RegisterParameterizedTests is
-  // present but does nothing.
-  void RegisterParameterizedTests();
-
-  // Runs all tests in this UnitTest object, prints the result, and
-  // returns true if all tests are successful.  If any exception is
-  // thrown during a test, this test is considered to be failed, but
-  // the rest of the tests will still be run.
-  bool RunAllTests();
-
-  // Clears the results of all tests, except the ad hoc tests.
-  void ClearNonAdHocTestResult() {
-    ForEach(test_suites_, TestSuite::ClearTestSuiteResult);
-  }
-
-  // Clears the results of ad-hoc test assertions.
-  void ClearAdHocTestResult() {
-    ad_hoc_test_result_.Clear();
-  }
-
-  // Adds a TestProperty to the current TestResult object when invoked in a
-  // context of a test or a test suite, or to the global property set. If the
-  // result already contains a property with the same key, the value will be
-  // updated.
-  void RecordProperty(const TestProperty& test_property);
-
-  enum ReactionToSharding {
-    HONOR_SHARDING_PROTOCOL,
-    IGNORE_SHARDING_PROTOCOL
-  };
-
-  // Matches the full name of each test against the user-specified
-  // filter to decide whether the test should run, then records the
-  // result in each TestSuite and TestInfo object.
-  // If shard_tests == HONOR_SHARDING_PROTOCOL, further filters tests
-  // based on sharding variables in the environment.
-  // Returns the number of tests that should run.
-  int FilterTests(ReactionToSharding shard_tests);
-
-  // Prints the names of the tests matching the user-specified filter flag.
-  void ListTestsMatchingFilter();
-
-  const TestSuite* current_test_suite() const { return current_test_suite_; }
-  TestInfo* current_test_info() { return current_test_info_; }
-  const TestInfo* current_test_info() const { return current_test_info_; }
-
-  // Returns the vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*>& environments() { return environments_; }
-
-  // Getters for the per-thread Google Test trace stack.
-  std::vector<TraceInfo>& gtest_trace_stack() {
-    return *(gtest_trace_stack_.pointer());
-  }
-  const std::vector<TraceInfo>& gtest_trace_stack() const {
-    return gtest_trace_stack_.get();
-  }
-
-#if GTEST_HAS_DEATH_TEST
-  void InitDeathTestSubprocessControlInfo() {
-    internal_run_death_test_flag_.reset(ParseInternalRunDeathTestFlag());
-  }
-  // Returns a pointer to the parsed --gtest_internal_run_death_test
-  // flag, or NULL if that flag was not specified.
-  // This information is useful only in a death test child process.
-  // Must not be called before a call to InitGoogleTest.
-  const InternalRunDeathTestFlag* internal_run_death_test_flag() const {
-    return internal_run_death_test_flag_.get();
-  }
-
-  // Returns a pointer to the current death test factory.
-  internal::DeathTestFactory* death_test_factory() {
-    return death_test_factory_.get();
-  }
-
-  void SuppressTestEventsIfInSubprocess();
-
-  friend class ReplaceDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // Initializes the event listener performing XML output as specified by
-  // UnitTestOptions. Must not be called before InitGoogleTest.
-  void ConfigureXmlOutput();
-
-#if GTEST_CAN_STREAM_RESULTS_
-  // Initializes the event listener for streaming test results to a socket.
-  // Must not be called before InitGoogleTest.
-  void ConfigureStreamingOutput();
-#endif
-
-  // Performs initialization dependent upon flag values obtained in
-  // ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-  // ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-  // this function is also called from RunAllTests.  Since this function can be
-  // called more than once, it has to be idempotent.
-  void PostFlagParsingInit();
-
-  // Gets the random seed used at the start of the current test iteration.
-  int random_seed() const { return random_seed_; }
-
-  // Gets the random number generator.
-  internal::Random* random() { return &random_; }
-
-  // Shuffles all test suites, and the tests within each test suite,
-  // making sure that death tests are still run first.
-  void ShuffleTests();
-
-  // Restores the test suites and tests to their order before the first shuffle.
-  void UnshuffleTests();
-
-  // Returns the value of GTEST_FLAG(catch_exceptions) at the moment
-  // UnitTest::Run() starts.
-  bool catch_exceptions() const { return catch_exceptions_; }
-
- private:
-  friend class ::testing::UnitTest;
-
-  // Used by UnitTest::Run() to capture the state of
-  // GTEST_FLAG(catch_exceptions) at the moment it starts.
-  void set_catch_exceptions(bool value) { catch_exceptions_ = value; }
-
-  // The UnitTest object that owns this implementation object.
-  UnitTest* const parent_;
-
-  // The working directory when the first TEST() or TEST_F() was
-  // executed.
-  internal::FilePath original_working_dir_;
-
-  // The default test part result reporters.
-  DefaultGlobalTestPartResultReporter default_global_test_part_result_reporter_;
-  DefaultPerThreadTestPartResultReporter
-      default_per_thread_test_part_result_reporter_;
-
-  // Points to (but doesn't own) the global test part result reporter.
-  TestPartResultReporterInterface* global_test_part_result_repoter_;
-
-  // Protects read and write access to global_test_part_result_reporter_.
-  internal::Mutex global_test_part_result_reporter_mutex_;
-
-  // Points to (but doesn't own) the per-thread test part result reporter.
-  internal::ThreadLocal<TestPartResultReporterInterface*>
-      per_thread_test_part_result_reporter_;
-
-  // The vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*> environments_;
-
-  // The vector of TestSuites in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestSuite*> test_suites_;
-
-  // Provides a level of indirection for the test suite list to allow
-  // easy shuffling and restoring the test suite order.  The i-th
-  // element of this vector is the index of the i-th test suite in the
-  // shuffled order.
-  std::vector<int> test_suite_indices_;
-
-  // ParameterizedTestRegistry object used to register value-parameterized
-  // tests.
-  internal::ParameterizedTestSuiteRegistry parameterized_test_registry_;
-  internal::TypeParameterizedTestSuiteRegistry
-      type_parameterized_test_registry_;
-
-  // The set holding the name of parameterized
-  // test suites that may go uninstantiated.
-  std::set<std::string> ignored_parameterized_test_suites_;
-
-  // Indicates whether RegisterParameterizedTests() has been called already.
-  bool parameterized_tests_registered_;
-
-  // Index of the last death test suite registered.  Initially -1.
-  int last_death_test_suite_;
-
-  // This points to the TestSuite for the currently running test.  It
-  // changes as Google Test goes through one test suite after another.
-  // When no test is running, this is set to NULL and Google Test
-  // stores assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestSuite* current_test_suite_;
-
-  // This points to the TestInfo for the currently running test.  It
-  // changes as Google Test goes through one test after another.  When
-  // no test is running, this is set to NULL and Google Test stores
-  // assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestInfo* current_test_info_;
-
-  // Normally, a user only writes assertions inside a TEST or TEST_F,
-  // or inside a function called by a TEST or TEST_F.  Since Google
-  // Test keeps track of which test is current running, it can
-  // associate such an assertion with the test it belongs to.
-  //
-  // If an assertion is encountered when no TEST or TEST_F is running,
-  // Google Test attributes the assertion result to an imaginary "ad hoc"
-  // test, and records the result in ad_hoc_test_result_.
-  TestResult ad_hoc_test_result_;
-
-  // The list of event listeners that can be used to track events inside
-  // Google Test.
-  TestEventListeners listeners_;
-
-  // The OS stack trace getter.  Will be deleted when the UnitTest
-  // object is destructed.  By default, an OsStackTraceGetter is used,
-  // but the user can set this field to use a custom getter if that is
-  // desired.
-  OsStackTraceGetterInterface* os_stack_trace_getter_;
-
-  // True if and only if PostFlagParsingInit() has been called.
-  bool post_flag_parse_init_performed_;
-
-  // The random number seed used at the beginning of the test run.
-  int random_seed_;
-
-  // Our random number generator.
-  internal::Random random_;
-
-  // The time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp_;
-
-  // How long the test took to run, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-#if GTEST_HAS_DEATH_TEST
-  // The decomposed components of the gtest_internal_run_death_test flag,
-  // parsed when RUN_ALL_TESTS is called.
-  std::unique_ptr<InternalRunDeathTestFlag> internal_run_death_test_flag_;
-  std::unique_ptr<internal::DeathTestFactory> death_test_factory_;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // A per-thread stack of traces created by the SCOPED_TRACE() macro.
-  internal::ThreadLocal<std::vector<TraceInfo> > gtest_trace_stack_;
-
-  // The value of GTEST_FLAG(catch_exceptions) at the moment RunAllTests()
-  // starts.
-  bool catch_exceptions_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTestImpl);
-};  // class UnitTestImpl
-
-// Convenience function for accessing the global UnitTest
-// implementation object.
-inline UnitTestImpl* GetUnitTestImpl() {
-  return UnitTest::GetInstance()->impl();
-}
-
-#if GTEST_USES_SIMPLE_RE
-
-// Internal helper functions for implementing the simple regular
-// expression matcher.
-GTEST_API_ bool IsInSet(char ch, const char* str);
-GTEST_API_ bool IsAsciiDigit(char ch);
-GTEST_API_ bool IsAsciiPunct(char ch);
-GTEST_API_ bool IsRepeat(char ch);
-GTEST_API_ bool IsAsciiWhiteSpace(char ch);
-GTEST_API_ bool IsAsciiWordChar(char ch);
-GTEST_API_ bool IsValidEscape(char ch);
-GTEST_API_ bool AtomMatchesChar(bool escaped, char pattern, char ch);
-GTEST_API_ bool ValidateRegex(const char* regex);
-GTEST_API_ bool MatchRegexAtHead(const char* regex, const char* str);
-GTEST_API_ bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char ch, char repeat, const char* regex, const char* str);
-GTEST_API_ bool MatchRegexAnywhere(const char* regex, const char* str);
-
-#endif  // GTEST_USES_SIMPLE_RE
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, char** argv);
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
-
-#if GTEST_HAS_DEATH_TEST
-
-// Returns the message describing the last system error, regardless of the
-// platform.
-GTEST_API_ std::string GetLastErrnoDescription();
-
-// Attempts to parse a string into a positive integer pointed to by the
-// number parameter.  Returns true if that is possible.
-// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can use
-// it here.
-template <typename Integer>
-bool ParseNaturalNumber(const ::std::string& str, Integer* number) {
-  // Fail fast if the given string does not begin with a digit;
-  // this bypasses strtoXXX's "optional leading whitespace and plus
-  // or minus sign" semantics, which are undesirable here.
-  if (str.empty() || !IsDigit(str[0])) {
-    return false;
-  }
-  errno = 0;
-
-  char* end;
-  // BiggestConvertible is the largest integer type that system-provided
-  // string-to-number conversion routines can return.
-  using BiggestConvertible = unsigned long long;  // NOLINT
-
-  const BiggestConvertible parsed = strtoull(str.c_str(), &end, 10);  // NOLINT
-  const bool parse_success = *end == '\0' && errno == 0;
-
-  GTEST_CHECK_(sizeof(Integer) <= sizeof(parsed));
-
-  const Integer result = static_cast<Integer>(parsed);
-  if (parse_success && static_cast<BiggestConvertible>(result) == parsed) {
-    *number = result;
-    return true;
-  }
-  return false;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// TestResult contains some private methods that should be hidden from
-// Google Test user but are required for testing. This class allow our tests
-// to access them.
-//
-// This class is supplied only for the purpose of testing Google Test's own
-// constructs. Do not use it in user tests, either directly or indirectly.
-class TestResultAccessor {
- public:
-  static void RecordProperty(TestResult* test_result,
-                             const std::string& xml_element,
-                             const TestProperty& property) {
-    test_result->RecordProperty(xml_element, property);
-  }
-
-  static void ClearTestPartResults(TestResult* test_result) {
-    test_result->ClearTestPartResults();
-  }
-
-  static const std::vector<testing::TestPartResult>& test_part_results(
-      const TestResult& test_result) {
-    return test_result.test_part_results();
-  }
-};
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Streams test results to the given port on the given host machine.
-class StreamingListener : public EmptyTestEventListener {
- public:
-  // Abstract base class for writing strings to a socket.
-  class AbstractSocketWriter {
-   public:
-    virtual ~AbstractSocketWriter() {}
-
-    // Sends a string to the socket.
-    virtual void Send(const std::string& message) = 0;
-
-    // Closes the socket.
-    virtual void CloseConnection() {}
-
-    // Sends a string and a newline to the socket.
-    void SendLn(const std::string& message) { Send(message + "\n"); }
-  };
-
-  // Concrete class for actually writing strings to a socket.
-  class SocketWriter : public AbstractSocketWriter {
-   public:
-    SocketWriter(const std::string& host, const std::string& port)
-        : sockfd_(-1), host_name_(host), port_num_(port) {
-      MakeConnection();
-    }
-
-    ~SocketWriter() override {
-      if (sockfd_ != -1)
-        CloseConnection();
-    }
-
-    // Sends a string to the socket.
-    void Send(const std::string& message) override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "Send() can be called only when there is a connection.";
-
-      const auto len = static_cast<size_t>(message.length());
-      if (write(sockfd_, message.c_str(), len) != static_cast<ssize_t>(len)) {
-        GTEST_LOG_(WARNING)
-            << "stream_result_to: failed to stream to "
-            << host_name_ << ":" << port_num_;
-      }
-    }
-
-   private:
-    // Creates a client socket and connects to the server.
-    void MakeConnection();
-
-    // Closes the socket.
-    void CloseConnection() override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "CloseConnection() can be called only when there is a connection.";
-
-      close(sockfd_);
-      sockfd_ = -1;
-    }
-
-    int sockfd_;  // socket file descriptor
-    const std::string host_name_;
-    const std::string port_num_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(SocketWriter);
-  };  // class SocketWriter
-
-  // Escapes '=', '&', '%', and '\n' characters in str as "%xx".
-  static std::string UrlEncode(const char* str);
-
-  StreamingListener(const std::string& host, const std::string& port)
-      : socket_writer_(new SocketWriter(host, port)) {
-    Start();
-  }
-
-  explicit StreamingListener(AbstractSocketWriter* socket_writer)
-      : socket_writer_(socket_writer) { Start(); }
-
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {
-    SendLn("event=TestProgramStart");
-  }
-
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    // Note that Google Test current only report elapsed time for each
-    // test iteration, not for the entire test program.
-    SendLn("event=TestProgramEnd&passed=" + FormatBool(unit_test.Passed()));
-
-    // Notify the streaming server to stop.
-    socket_writer_->CloseConnection();
-  }
-
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int iteration) override {
-    SendLn("event=TestIterationStart&iteration=" +
-           StreamableToString(iteration));
-  }
-
-  void OnTestIterationEnd(const UnitTest& unit_test,
-                          int /* iteration */) override {
-    SendLn("event=TestIterationEnd&passed=" +
-           FormatBool(unit_test.Passed()) + "&elapsed_time=" +
-           StreamableToString(unit_test.elapsed_time()) + "ms");
-  }
-
-  // Note that "event=TestCaseStart" is a wire format and has to remain
-  // "case" for compatibility
-  void OnTestCaseStart(const TestCase& test_case) override {
-    SendLn(std::string("event=TestCaseStart&name=") + test_case.name());
-  }
-
-  // Note that "event=TestCaseEnd" is a wire format and has to remain
-  // "case" for compatibility
-  void OnTestCaseEnd(const TestCase& test_case) override {
-    SendLn("event=TestCaseEnd&passed=" + FormatBool(test_case.Passed()) +
-           "&elapsed_time=" + StreamableToString(test_case.elapsed_time()) +
-           "ms");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    SendLn(std::string("event=TestStart&name=") + test_info.name());
-  }
-
-  void OnTestEnd(const TestInfo& test_info) override {
-    SendLn("event=TestEnd&passed=" +
-           FormatBool((test_info.result())->Passed()) +
-           "&elapsed_time=" +
-           StreamableToString((test_info.result())->elapsed_time()) + "ms");
-  }
-
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    const char* file_name = test_part_result.file_name();
-    if (file_name == nullptr) file_name = "";
-    SendLn("event=TestPartResult&file=" + UrlEncode(file_name) +
-           "&line=" + StreamableToString(test_part_result.line_number()) +
-           "&message=" + UrlEncode(test_part_result.message()));
-  }
-
- private:
-  // Sends the given message and a newline to the socket.
-  void SendLn(const std::string& message) { socket_writer_->SendLn(message); }
-
-  // Called at the start of streaming to notify the receiver what
-  // protocol we are using.
-  void Start() { SendLn("gtest_streaming_protocol_version=1.0"); }
-
-  std::string FormatBool(bool value) { return value ? "1" : "0"; }
-
-  const std::unique_ptr<AbstractSocketWriter> socket_writer_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamingListener);
-};  // class StreamingListener
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
diff --git a/third_party/googletest/googletest/src/gtest-matchers.cc b/third_party/googletest/googletest/src/gtest-matchers.cc
deleted file mode 100644
index 65104eb..0000000
--- a/third_party/googletest/googletest/src/gtest-matchers.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-matchers.h"
-
-#include <string>
-
-namespace testing {
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const char* s) { *this = Eq(std::string(s)); }
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// Constructs a matcher that matches a const StringView& whose value is
-// equal to s.
-Matcher<const internal::StringView&>::Matcher(const std::string& s) {
-  *this = Eq(s);
-}
-
-// Constructs a matcher that matches a const StringView& whose value is
-// equal to s.
-Matcher<const internal::StringView&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a const StringView& whose value is
-// equal to s.
-Matcher<const internal::StringView&>::Matcher(internal::StringView s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a StringView whose value is equal to
-// s.
-Matcher<internal::StringView>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a StringView whose value is equal to
-// s.
-Matcher<internal::StringView>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a StringView whose value is equal to
-// s.
-Matcher<internal::StringView>::Matcher(internal::StringView s) {
-  *this = Eq(std::string(s));
-}
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest-port.cc b/third_party/googletest/googletest/src/gtest-port.cc
deleted file mode 100644
index 26bc857..0000000
--- a/third_party/googletest/googletest/src/gtest-port.cc
+++ /dev/null
@@ -1,1414 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/internal/gtest-port.h"
-
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <cstdint>
-#include <fstream>
-#include <memory>
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <io.h>
-# include <sys/stat.h>
-# include <map>  // Used in ThreadLocal.
-# ifdef _MSC_VER
-#  include <crtdbg.h>
-# endif  // _MSC_VER
-#else
-# include <unistd.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-# include <mach/mach_init.h>
-# include <mach/task.h>
-# include <mach/vm_map.h>
-#endif  // GTEST_OS_MAC
-
-#if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# include <sys/sysctl.h>
-# if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#  include <sys/user.h>
-# endif
-#endif
-
-#if GTEST_OS_QNX
-# include <devctl.h>
-# include <fcntl.h>
-# include <sys/procfs.h>
-#endif  // GTEST_OS_QNX
-
-#if GTEST_OS_AIX
-# include <procinfo.h>
-# include <sys/types.h>
-#endif  // GTEST_OS_AIX
-
-#if GTEST_OS_FUCHSIA
-# include <zircon/process.h>
-# include <zircon/syscalls.h>
-#endif  // GTEST_OS_FUCHSIA
-
-#if GTEST_OS_IOS
-#import <Foundation/Foundation.h>
-#endif  // GTEST_OS_IOS
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-
-#if defined(_MSC_VER) || defined(__BORLANDC__)
-// MSVC and C++Builder do not provide a definition of STDERR_FILENO.
-const int kStdOutFileno = 1;
-const int kStdErrFileno = 2;
-#else
-const int kStdOutFileno = STDOUT_FILENO;
-const int kStdErrFileno = STDERR_FILENO;
-#endif  // _MSC_VER
-
-#if GTEST_OS_LINUX
-
-namespace {
-template <typename T>
-T ReadProcFileField(const std::string& filename, int field) {
-  std::string dummy;
-  std::ifstream file(filename.c_str());
-  while (field-- > 0) {
-    file >> dummy;
-  }
-  T output = 0;
-  file >> output;
-  return output;
-}
-}  // namespace
-
-// Returns the number of active threads, or 0 when there is an error.
-size_t GetThreadCount() {
-  const std::string filename =
-      (Message() << "/proc/" << getpid() << "/stat").GetString();
-  return ReadProcFileField<size_t>(filename, 19);
-}
-
-#elif GTEST_OS_MAC
-
-size_t GetThreadCount() {
-  const task_t task = mach_task_self();
-  mach_msg_type_number_t thread_count;
-  thread_act_array_t thread_list;
-  const kern_return_t status = task_threads(task, &thread_list, &thread_count);
-  if (status == KERN_SUCCESS) {
-    // task_threads allocates resources in thread_list and we need to free them
-    // to avoid leaks.
-    vm_deallocate(task,
-                  reinterpret_cast<vm_address_t>(thread_list),
-                  sizeof(thread_t) * thread_count);
-    return static_cast<size_t>(thread_count);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-      GTEST_OS_NETBSD
-
-#if GTEST_OS_NETBSD
-#undef KERN_PROC
-#define KERN_PROC KERN_PROC2
-#define kinfo_proc kinfo_proc2
-#endif
-
-#if GTEST_OS_DRAGONFLY
-#define KP_NLWP(kp) (kp.kp_nthreads)
-#elif GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#define KP_NLWP(kp) (kp.ki_numthreads)
-#elif GTEST_OS_NETBSD
-#define KP_NLWP(kp) (kp.p_nlwps)
-#endif
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID,
-    getpid(),
-#if GTEST_OS_NETBSD
-    sizeof(struct kinfo_proc),
-    1,
-#endif
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-  struct kinfo_proc info;
-  size_t size = sizeof(info);
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-  return static_cast<size_t>(KP_NLWP(info));
-}
-#elif GTEST_OS_OPENBSD
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID | KERN_PROC_SHOW_THREADS,
-    getpid(),
-    sizeof(struct kinfo_proc),
-    0,
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-
-  // get number of structs
-  size_t size;
-  if (sysctl(mib, miblen, NULL, &size, NULL, 0)) {
-    return 0;
-  }
-
-  mib[5] = static_cast<int>(size / static_cast<size_t>(mib[4]));
-
-  // populate array of structs
-  struct kinfo_proc info[mib[5]];
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-
-  // exclude empty members
-  size_t nthreads = 0;
-  for (size_t i = 0; i < size / static_cast<size_t>(mib[4]); i++) {
-    if (info[i].p_tid != -1)
-      nthreads++;
-  }
-  return nthreads;
-}
-
-#elif GTEST_OS_QNX
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  const int fd = open("/proc/self/as", O_RDONLY);
-  if (fd < 0) {
-    return 0;
-  }
-  procfs_info process_info;
-  const int status =
-      devctl(fd, DCMD_PROC_INFO, &process_info, sizeof(process_info), nullptr);
-  close(fd);
-  if (status == EOK) {
-    return static_cast<size_t>(process_info.num_threads);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_AIX
-
-size_t GetThreadCount() {
-  struct procentry64 entry;
-  pid_t pid = getpid();
-  int status = getprocs64(&entry, sizeof(entry), nullptr, 0, &pid, 1);
-  if (status == 1) {
-    return entry.pi_thcount;
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_FUCHSIA
-
-size_t GetThreadCount() {
-  int dummy_buffer;
-  size_t avail;
-  zx_status_t status = zx_object_get_info(
-      zx_process_self(),
-      ZX_INFO_PROCESS_THREADS,
-      &dummy_buffer,
-      0,
-      nullptr,
-      &avail);
-  if (status == ZX_OK) {
-    return avail;
-  } else {
-    return 0;
-  }
-}
-
-#else
-
-size_t GetThreadCount() {
-  // There's no portable way to detect the number of threads, so we just
-  // return 0 to indicate that we cannot detect it.
-  return 0;
-}
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-void SleepMilliseconds(int n) {
-  ::Sleep(static_cast<DWORD>(n));
-}
-
-AutoHandle::AutoHandle()
-    : handle_(INVALID_HANDLE_VALUE) {}
-
-AutoHandle::AutoHandle(Handle handle)
-    : handle_(handle) {}
-
-AutoHandle::~AutoHandle() {
-  Reset();
-}
-
-AutoHandle::Handle AutoHandle::Get() const {
-  return handle_;
-}
-
-void AutoHandle::Reset() {
-  Reset(INVALID_HANDLE_VALUE);
-}
-
-void AutoHandle::Reset(HANDLE handle) {
-  // Resetting with the same handle we already own is invalid.
-  if (handle_ != handle) {
-    if (IsCloseable()) {
-      ::CloseHandle(handle_);
-    }
-    handle_ = handle;
-  } else {
-    GTEST_CHECK_(!IsCloseable())
-        << "Resetting a valid handle to itself is likely a programmer error "
-            "and thus not allowed.";
-  }
-}
-
-bool AutoHandle::IsCloseable() const {
-  // Different Windows APIs may use either of these values to represent an
-  // invalid handle.
-  return handle_ != nullptr && handle_ != INVALID_HANDLE_VALUE;
-}
-
-Notification::Notification()
-    : event_(::CreateEvent(nullptr,     // Default security attributes.
-                           TRUE,        // Do not reset automatically.
-                           FALSE,       // Initially unset.
-                           nullptr)) {  // Anonymous event.
-  GTEST_CHECK_(event_.Get() != nullptr);
-}
-
-void Notification::Notify() {
-  GTEST_CHECK_(::SetEvent(event_.Get()) != FALSE);
-}
-
-void Notification::WaitForNotification() {
-  GTEST_CHECK_(
-      ::WaitForSingleObject(event_.Get(), INFINITE) == WAIT_OBJECT_0);
-}
-
-Mutex::Mutex()
-    : owner_thread_id_(0),
-      type_(kDynamic),
-      critical_section_init_phase_(0),
-      critical_section_(new CRITICAL_SECTION) {
-  ::InitializeCriticalSection(critical_section_);
-}
-
-Mutex::~Mutex() {
-  // Static mutexes are leaked intentionally. It is not thread-safe to try
-  // to clean them up.
-  if (type_ == kDynamic) {
-    ::DeleteCriticalSection(critical_section_);
-    delete critical_section_;
-    critical_section_ = nullptr;
-  }
-}
-
-void Mutex::Lock() {
-  ThreadSafeLazyInit();
-  ::EnterCriticalSection(critical_section_);
-  owner_thread_id_ = ::GetCurrentThreadId();
-}
-
-void Mutex::Unlock() {
-  ThreadSafeLazyInit();
-  // We don't protect writing to owner_thread_id_ here, as it's the
-  // caller's responsibility to ensure that the current thread holds the
-  // mutex when this is called.
-  owner_thread_id_ = 0;
-  ::LeaveCriticalSection(critical_section_);
-}
-
-// Does nothing if the current thread holds the mutex. Otherwise, crashes
-// with high probability.
-void Mutex::AssertHeld() {
-  ThreadSafeLazyInit();
-  GTEST_CHECK_(owner_thread_id_ == ::GetCurrentThreadId())
-      << "The current thread is not holding the mutex @" << this;
-}
-
-namespace {
-
-#ifdef _MSC_VER
-// Use the RAII idiom to flag mem allocs that are intentionally never
-// deallocated. The motivation is to silence the false positive mem leaks
-// that are reported by the debug version of MS's CRT which can only detect
-// if an alloc is missing a matching deallocation.
-// Example:
-//    MemoryIsNotDeallocated memory_is_not_deallocated;
-//    critical_section_ = new CRITICAL_SECTION;
-//
-class MemoryIsNotDeallocated
-{
- public:
-  MemoryIsNotDeallocated() : old_crtdbg_flag_(0) {
-    old_crtdbg_flag_ = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
-    // Set heap allocation block type to _IGNORE_BLOCK so that MS debug CRT
-    // doesn't report mem leak if there's no matching deallocation.
-    _CrtSetDbgFlag(old_crtdbg_flag_ & ~_CRTDBG_ALLOC_MEM_DF);
-  }
-
-  ~MemoryIsNotDeallocated() {
-    // Restore the original _CRTDBG_ALLOC_MEM_DF flag
-    _CrtSetDbgFlag(old_crtdbg_flag_);
-  }
-
- private:
-  int old_crtdbg_flag_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MemoryIsNotDeallocated);
-};
-#endif  // _MSC_VER
-
-}  // namespace
-
-// Initializes owner_thread_id_ and critical_section_ in static mutexes.
-void Mutex::ThreadSafeLazyInit() {
-  // Dynamic mutexes are initialized in the constructor.
-  if (type_ == kStatic) {
-    switch (
-        ::InterlockedCompareExchange(&critical_section_init_phase_, 1L, 0L)) {
-      case 0:
-        // If critical_section_init_phase_ was 0 before the exchange, we
-        // are the first to test it and need to perform the initialization.
-        owner_thread_id_ = 0;
-        {
-          // Use RAII to flag that following mem alloc is never deallocated.
-#ifdef _MSC_VER
-          MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-          critical_section_ = new CRITICAL_SECTION;
-        }
-        ::InitializeCriticalSection(critical_section_);
-        // Updates the critical_section_init_phase_ to 2 to signal
-        // initialization complete.
-        GTEST_CHECK_(::InterlockedCompareExchange(
-                          &critical_section_init_phase_, 2L, 1L) ==
-                      1L);
-        break;
-      case 1:
-        // Somebody else is already initializing the mutex; spin until they
-        // are done.
-        while (::InterlockedCompareExchange(&critical_section_init_phase_,
-                                            2L,
-                                            2L) != 2L) {
-          // Possibly yields the rest of the thread's time slice to other
-          // threads.
-          ::Sleep(0);
-        }
-        break;
-
-      case 2:
-        break;  // The mutex is already initialized and ready for use.
-
-      default:
-        GTEST_CHECK_(false)
-            << "Unexpected value of critical_section_init_phase_ "
-            << "while initializing a static mutex.";
-    }
-  }
-}
-
-namespace {
-
-class ThreadWithParamSupport : public ThreadWithParamBase {
- public:
-  static HANDLE CreateThread(Runnable* runnable,
-                             Notification* thread_can_start) {
-    ThreadMainParam* param = new ThreadMainParam(runnable, thread_can_start);
-    DWORD thread_id;
-    HANDLE thread_handle = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size.
-        &ThreadWithParamSupport::ThreadMain,
-        param,        // Parameter to ThreadMainStatic
-        0x0,          // Default creation flags.
-        &thread_id);  // Need a valid pointer for the call to work under Win98.
-    GTEST_CHECK_(thread_handle != nullptr)
-        << "CreateThread failed with error " << ::GetLastError() << ".";
-    if (thread_handle == nullptr) {
-      delete param;
-    }
-    return thread_handle;
-  }
-
- private:
-  struct ThreadMainParam {
-    ThreadMainParam(Runnable* runnable, Notification* thread_can_start)
-        : runnable_(runnable),
-          thread_can_start_(thread_can_start) {
-    }
-    std::unique_ptr<Runnable> runnable_;
-    // Does not own.
-    Notification* thread_can_start_;
-  };
-
-  static DWORD WINAPI ThreadMain(void* ptr) {
-    // Transfers ownership.
-    std::unique_ptr<ThreadMainParam> param(static_cast<ThreadMainParam*>(ptr));
-    if (param->thread_can_start_ != nullptr)
-      param->thread_can_start_->WaitForNotification();
-    param->runnable_->Run();
-    return 0;
-  }
-
-  // Prohibit instantiation.
-  ThreadWithParamSupport();
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParamSupport);
-};
-
-}  // namespace
-
-ThreadWithParamBase::ThreadWithParamBase(Runnable *runnable,
-                                         Notification* thread_can_start)
-      : thread_(ThreadWithParamSupport::CreateThread(runnable,
-                                                     thread_can_start)) {
-}
-
-ThreadWithParamBase::~ThreadWithParamBase() {
-  Join();
-}
-
-void ThreadWithParamBase::Join() {
-  GTEST_CHECK_(::WaitForSingleObject(thread_.Get(), INFINITE) == WAIT_OBJECT_0)
-      << "Failed to join the thread with error " << ::GetLastError() << ".";
-}
-
-// Maps a thread to a set of ThreadIdToThreadLocals that have values
-// instantiated on that thread and notifies them when the thread exits.  A
-// ThreadLocal instance is expected to persist until all threads it has
-// values on have terminated.
-class ThreadLocalRegistryImpl {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-#ifdef _MSC_VER
-    MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-    DWORD current_thread = ::GetCurrentThreadId();
-    MutexLock lock(&mutex_);
-    ThreadIdToThreadLocals* const thread_to_thread_locals =
-        GetThreadLocalsMapLocked();
-    ThreadIdToThreadLocals::iterator thread_local_pos =
-        thread_to_thread_locals->find(current_thread);
-    if (thread_local_pos == thread_to_thread_locals->end()) {
-      thread_local_pos = thread_to_thread_locals->insert(
-          std::make_pair(current_thread, ThreadLocalValues())).first;
-      StartWatcherThreadFor(current_thread);
-    }
-    ThreadLocalValues& thread_local_values = thread_local_pos->second;
-    ThreadLocalValues::iterator value_pos =
-        thread_local_values.find(thread_local_instance);
-    if (value_pos == thread_local_values.end()) {
-      value_pos =
-          thread_local_values
-              .insert(std::make_pair(
-                  thread_local_instance,
-                  std::shared_ptr<ThreadLocalValueHolderBase>(
-                      thread_local_instance->NewValueForCurrentThread())))
-              .first;
-    }
-    return value_pos->second.get();
-  }
-
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadLocalValues data structure while holding the lock, but
-    // defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      for (ThreadIdToThreadLocals::iterator it =
-          thread_to_thread_locals->begin();
-          it != thread_to_thread_locals->end();
-          ++it) {
-        ThreadLocalValues& thread_local_values = it->second;
-        ThreadLocalValues::iterator value_pos =
-            thread_local_values.find(thread_local_instance);
-        if (value_pos != thread_local_values.end()) {
-          value_holders.push_back(value_pos->second);
-          thread_local_values.erase(value_pos);
-          // This 'if' can only be successful at most once, so theoretically we
-          // could break out of the loop here, but we don't bother doing so.
-        }
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
-  static void OnThreadExit(DWORD thread_id) {
-    GTEST_CHECK_(thread_id != 0) << ::GetLastError();
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadIdToThreadLocals data structure while holding the
-    // lock, but defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      ThreadIdToThreadLocals::iterator thread_local_pos =
-          thread_to_thread_locals->find(thread_id);
-      if (thread_local_pos != thread_to_thread_locals->end()) {
-        ThreadLocalValues& thread_local_values = thread_local_pos->second;
-        for (ThreadLocalValues::iterator value_pos =
-            thread_local_values.begin();
-            value_pos != thread_local_values.end();
-            ++value_pos) {
-          value_holders.push_back(value_pos->second);
-        }
-        thread_to_thread_locals->erase(thread_local_pos);
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
- private:
-  // In a particular thread, maps a ThreadLocal object to its value.
-  typedef std::map<const ThreadLocalBase*,
-                   std::shared_ptr<ThreadLocalValueHolderBase> >
-      ThreadLocalValues;
-  // Stores all ThreadIdToThreadLocals having values in a thread, indexed by
-  // thread's ID.
-  typedef std::map<DWORD, ThreadLocalValues> ThreadIdToThreadLocals;
-
-  // Holds the thread id and thread handle that we pass from
-  // StartWatcherThreadFor to WatcherThreadFunc.
-  typedef std::pair<DWORD, HANDLE> ThreadIdAndHandle;
-
-  static void StartWatcherThreadFor(DWORD thread_id) {
-    // The returned handle will be kept in thread_map and closed by
-    // watcher_thread in WatcherThreadFunc.
-    HANDLE thread = ::OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION,
-                                 FALSE,
-                                 thread_id);
-    GTEST_CHECK_(thread != nullptr);
-    // We need to pass a valid thread ID pointer into CreateThread for it
-    // to work correctly under Win98.
-    DWORD watcher_thread_id;
-    HANDLE watcher_thread = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size
-        &ThreadLocalRegistryImpl::WatcherThreadFunc,
-        reinterpret_cast<LPVOID>(new ThreadIdAndHandle(thread_id, thread)),
-        CREATE_SUSPENDED, &watcher_thread_id);
-    GTEST_CHECK_(watcher_thread != nullptr);
-    // Give the watcher thread the same priority as ours to avoid being
-    // blocked by it.
-    ::SetThreadPriority(watcher_thread,
-                        ::GetThreadPriority(::GetCurrentThread()));
-    ::ResumeThread(watcher_thread);
-    ::CloseHandle(watcher_thread);
-  }
-
-  // Monitors exit from a given thread and notifies those
-  // ThreadIdToThreadLocals about thread termination.
-  static DWORD WINAPI WatcherThreadFunc(LPVOID param) {
-    const ThreadIdAndHandle* tah =
-        reinterpret_cast<const ThreadIdAndHandle*>(param);
-    GTEST_CHECK_(
-        ::WaitForSingleObject(tah->second, INFINITE) == WAIT_OBJECT_0);
-    OnThreadExit(tah->first);
-    ::CloseHandle(tah->second);
-    delete tah;
-    return 0;
-  }
-
-  // Returns map of thread local instances.
-  static ThreadIdToThreadLocals* GetThreadLocalsMapLocked() {
-    mutex_.AssertHeld();
-#ifdef _MSC_VER
-    MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-    static ThreadIdToThreadLocals* map = new ThreadIdToThreadLocals();
-    return map;
-  }
-
-  // Protects access to GetThreadLocalsMapLocked() and its return value.
-  static Mutex mutex_;
-  // Protects access to GetThreadMapLocked() and its return value.
-  static Mutex thread_map_mutex_;
-};
-
-Mutex ThreadLocalRegistryImpl::mutex_(Mutex::kStaticMutex);
-Mutex ThreadLocalRegistryImpl::thread_map_mutex_(Mutex::kStaticMutex);
-
-ThreadLocalValueHolderBase* ThreadLocalRegistry::GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-  return ThreadLocalRegistryImpl::GetValueOnCurrentThread(
-      thread_local_instance);
-}
-
-void ThreadLocalRegistry::OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-  ThreadLocalRegistryImpl::OnThreadLocalDestroyed(thread_local_instance);
-}
-
-#endif  // GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-#if GTEST_USES_POSIX_RE
-
-// Implements RE.  Currently only needed for death tests.
-
-RE::~RE() {
-  if (is_valid_) {
-    // regfree'ing an invalid regex might crash because the content
-    // of the regex is undefined. Since the regex's are essentially
-    // the same, one cannot be valid (or invalid) without the other
-    // being so too.
-    regfree(&partial_regex_);
-    regfree(&full_regex_);
-  }
-  free(const_cast<char*>(pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = posix::StrDup(regex);
-
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match.
-  const size_t full_regex_len = strlen(regex) + 10;
-  char* const full_pattern = new char[full_regex_len];
-
-  snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
-  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
-  // We want to call regcomp(&partial_regex_, ...) even if the
-  // previous expression returns false.  Otherwise partial_regex_ may
-  // not be properly initialized can may cause trouble when it's
-  // freed.
-  //
-  // Some implementation of POSIX regex (e.g. on at least some
-  // versions of Cygwin) doesn't accept the empty string as a valid
-  // regex.  We change it to an equivalent form "()" to be safe.
-  if (is_valid_) {
-    const char* const partial_regex = (*regex == '\0') ? "()" : regex;
-    is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
-  }
-  EXPECT_TRUE(is_valid_)
-      << "Regular expression \"" << regex
-      << "\" is not a valid POSIX Extended regular expression.";
-
-  delete[] full_pattern;
-}
-
-#elif GTEST_USES_SIMPLE_RE
-
-// Returns true if and only if ch appears anywhere in str (excluding the
-// terminating '\0' character).
-bool IsInSet(char ch, const char* str) {
-  return ch != '\0' && strchr(str, ch) != nullptr;
-}
-
-// Returns true if and only if ch belongs to the given classification.
-// Unlike similar functions in <ctype.h>, these aren't affected by the
-// current locale.
-bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
-bool IsAsciiPunct(char ch) {
-  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
-}
-bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
-bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
-bool IsAsciiWordChar(char ch) {
-  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
-      ('0' <= ch && ch <= '9') || ch == '_';
-}
-
-// Returns true if and only if "\\c" is a supported escape sequence.
-bool IsValidEscape(char c) {
-  return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
-}
-
-// Returns true if and only if the given atom (specified by escaped and
-// pattern) matches ch.  The result is undefined if the atom is invalid.
-bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
-  if (escaped) {  // "\\p" where p is pattern_char.
-    switch (pattern_char) {
-      case 'd': return IsAsciiDigit(ch);
-      case 'D': return !IsAsciiDigit(ch);
-      case 'f': return ch == '\f';
-      case 'n': return ch == '\n';
-      case 'r': return ch == '\r';
-      case 's': return IsAsciiWhiteSpace(ch);
-      case 'S': return !IsAsciiWhiteSpace(ch);
-      case 't': return ch == '\t';
-      case 'v': return ch == '\v';
-      case 'w': return IsAsciiWordChar(ch);
-      case 'W': return !IsAsciiWordChar(ch);
-    }
-    return IsAsciiPunct(pattern_char) && pattern_char == ch;
-  }
-
-  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
-}
-
-// Helper function used by ValidateRegex() to format error messages.
-static std::string FormatRegexSyntaxError(const char* regex, int index) {
-  return (Message() << "Syntax error at index " << index
-          << " in simple regular expression \"" << regex << "\": ").GetString();
-}
-
-// Generates non-fatal failures and returns false if regex is invalid;
-// otherwise returns true.
-bool ValidateRegex(const char* regex) {
-  if (regex == nullptr) {
-    ADD_FAILURE() << "NULL is not a valid simple regular expression.";
-    return false;
-  }
-
-  bool is_valid = true;
-
-  // True if and only if ?, *, or + can follow the previous atom.
-  bool prev_repeatable = false;
-  for (int i = 0; regex[i]; i++) {
-    if (regex[i] == '\\') {  // An escape sequence
-      i++;
-      if (regex[i] == '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "'\\' cannot appear at the end.";
-        return false;
-      }
-
-      if (!IsValidEscape(regex[i])) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "invalid escape sequence \"\\" << regex[i] << "\".";
-        is_valid = false;
-      }
-      prev_repeatable = true;
-    } else {  // Not an escape sequence.
-      const char ch = regex[i];
-
-      if (ch == '^' && i > 0) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'^' can only appear at the beginning.";
-        is_valid = false;
-      } else if (ch == '$' && regex[i + 1] != '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'$' can only appear at the end.";
-        is_valid = false;
-      } else if (IsInSet(ch, "()[]{}|")) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' is unsupported.";
-        is_valid = false;
-      } else if (IsRepeat(ch) && !prev_repeatable) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' can only follow a repeatable token.";
-        is_valid = false;
-      }
-
-      prev_repeatable = !IsInSet(ch, "^$?*+");
-    }
-  }
-
-  return is_valid;
-}
-
-// Matches a repeated regex atom followed by a valid simple regular
-// expression.  The regex atom is defined as c if escaped is false,
-// or \c otherwise.  repeat is the repetition meta character (?, *,
-// or +).  The behavior is undefined if str contains too many
-// characters to be indexable by size_t, in which case the test will
-// probably time out anyway.  We are fine with this limitation as
-// std::string has it too.
-bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char c, char repeat, const char* regex,
-    const char* str) {
-  const size_t min_count = (repeat == '+') ? 1 : 0;
-  const size_t max_count = (repeat == '?') ? 1 :
-      static_cast<size_t>(-1) - 1;
-  // We cannot call numeric_limits::max() as it conflicts with the
-  // max() macro on Windows.
-
-  for (size_t i = 0; i <= max_count; ++i) {
-    // We know that the atom matches each of the first i characters in str.
-    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
-      // We have enough matches at the head, and the tail matches too.
-      // Since we only care about *whether* the pattern matches str
-      // (as opposed to *how* it matches), there is no need to find a
-      // greedy match.
-      return true;
-    }
-    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
-      return false;
-  }
-  return false;
-}
-
-// Returns true if and only if regex matches a prefix of str. regex must
-// be a valid simple regular expression and not start with "^", or the
-// result is undefined.
-bool MatchRegexAtHead(const char* regex, const char* str) {
-  if (*regex == '\0')  // An empty regex matches a prefix of anything.
-    return true;
-
-  // "$" only matches the end of a string.  Note that regex being
-  // valid guarantees that there's nothing after "$" in it.
-  if (*regex == '$')
-    return *str == '\0';
-
-  // Is the first thing in regex an escape sequence?
-  const bool escaped = *regex == '\\';
-  if (escaped)
-    ++regex;
-  if (IsRepeat(regex[1])) {
-    // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
-    // here's an indirect recursion.  It terminates as the regex gets
-    // shorter in each recursion.
-    return MatchRepetitionAndRegexAtHead(
-        escaped, regex[0], regex[1], regex + 2, str);
-  } else {
-    // regex isn't empty, isn't "$", and doesn't start with a
-    // repetition.  We match the first atom of regex with the first
-    // character of str and recurse.
-    return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
-        MatchRegexAtHead(regex + 1, str + 1);
-  }
-}
-
-// Returns true if and only if regex matches any substring of str.  regex must
-// be a valid simple regular expression, or the result is undefined.
-//
-// The algorithm is recursive, but the recursion depth doesn't exceed
-// the regex length, so we won't need to worry about running out of
-// stack space normally.  In rare cases the time complexity can be
-// exponential with respect to the regex length + the string length,
-// but usually it's must faster (often close to linear).
-bool MatchRegexAnywhere(const char* regex, const char* str) {
-  if (regex == nullptr || str == nullptr) return false;
-
-  if (*regex == '^')
-    return MatchRegexAtHead(regex + 1, str);
-
-  // A successful match can be anywhere in str.
-  do {
-    if (MatchRegexAtHead(regex, str))
-      return true;
-  } while (*str++ != '\0');
-  return false;
-}
-
-// Implements the RE class.
-
-RE::~RE() {
-  free(const_cast<char*>(pattern_));
-  free(const_cast<char*>(full_pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = full_pattern_ = nullptr;
-  if (regex != nullptr) {
-    pattern_ = posix::StrDup(regex);
-  }
-
-  is_valid_ = ValidateRegex(regex);
-  if (!is_valid_) {
-    // No need to calculate the full pattern when the regex is invalid.
-    return;
-  }
-
-  const size_t len = strlen(regex);
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match: we need space to prepend a '^', append a '$', and
-  // terminate the string with '\0'.
-  char* buffer = static_cast<char*>(malloc(len + 3));
-  full_pattern_ = buffer;
-
-  if (*regex != '^')
-    *buffer++ = '^';  // Makes sure full_pattern_ starts with '^'.
-
-  // We don't use snprintf or strncpy, as they trigger a warning when
-  // compiled with VC++ 8.0.
-  memcpy(buffer, regex, len);
-  buffer += len;
-
-  if (len == 0 || regex[len - 1] != '$')
-    *buffer++ = '$';  // Makes sure full_pattern_ ends with '$'.
-
-  *buffer = '\0';
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-const char kUnknownFile[] = "unknown file";
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0) {
-    return file_name + ":";
-  }
-#ifdef _MSC_VER
-  return file_name + "(" + StreamableToString(line) + "):";
-#else
-  return file_name + ":" + StreamableToString(line) + ":";
-#endif  // _MSC_VER
-}
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-// Note that FormatCompilerIndependentFileLocation() does NOT append colon
-// to the file location it produces, unlike FormatFileLocation().
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
-    const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0)
-    return file_name;
-  else
-    return file_name + ":" + StreamableToString(line);
-}
-
-GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
-    : severity_(severity) {
-  const char* const marker =
-      severity == GTEST_INFO ?    "[  INFO ]" :
-      severity == GTEST_WARNING ? "[WARNING]" :
-      severity == GTEST_ERROR ?   "[ ERROR ]" : "[ FATAL ]";
-  GetStream() << ::std::endl << marker << " "
-              << FormatFileLocation(file, line).c_str() << ": ";
-}
-
-// Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-GTestLog::~GTestLog() {
-  GetStream() << ::std::endl;
-  if (severity_ == GTEST_FATAL) {
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// Disable Microsoft deprecation warnings for POSIX functions called from
-// this class (creat, dup, dup2, and close)
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Object that captures an output stream (stdout/stderr).
-class CapturedStream {
- public:
-  // The ctor redirects the stream to a temporary file.
-  explicit CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
-# if GTEST_OS_WINDOWS
-    char temp_dir_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-    char temp_file_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-
-    ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
-    const UINT success = ::GetTempFileNameA(temp_dir_path,
-                                            "gtest_redir",
-                                            0,  // Generate unique file name.
-                                            temp_file_path);
-    GTEST_CHECK_(success != 0)
-        << "Unable to create a temporary file in " << temp_dir_path;
-    const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
-    GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
-                                    << temp_file_path;
-    filename_ = temp_file_path;
-# else
-    // There's no guarantee that a test has write access to the current
-    // directory, so we create the temporary file in the /tmp directory
-    // instead. We use /tmp on most systems, and /sdcard on Android.
-    // That's because Android doesn't have /tmp.
-#  if GTEST_OS_LINUX_ANDROID
-    // Note: Android applications are expected to call the framework's
-    // Context.getExternalStorageDirectory() method through JNI to get
-    // the location of the world-writable SD Card directory. However,
-    // this requires a Context handle, which cannot be retrieved
-    // globally from native code. Doing so also precludes running the
-    // code as part of a regular standalone executable, which doesn't
-    // run in a Dalvik process (e.g. when running it through 'adb shell').
-    //
-    // The location /data/local/tmp is directly accessible from native code.
-    // '/sdcard' and other variants cannot be relied on, as they are not
-    // guaranteed to be mounted, or may have a delay in mounting.
-    char name_template[] = "/data/local/tmp/gtest_captured_stream.XXXXXX";
-#  elif GTEST_OS_IOS
-    NSString* temp_path = [NSTemporaryDirectory()
-        stringByAppendingPathComponent:@"gtest_captured_stream.XXXXXX"];
-
-    char name_template[PATH_MAX + 1];
-    strncpy(name_template, [temp_path UTF8String], PATH_MAX);
-#  else
-    char name_template[] = "/tmp/captured_stream.XXXXXX";
-#  endif
-    const int captured_fd = mkstemp(name_template);
-    if (captured_fd == -1) {
-      GTEST_LOG_(WARNING)
-          << "Failed to create tmp file " << name_template
-          << " for test; does the test have access to the /tmp directory?";
-    }
-    filename_ = name_template;
-# endif  // GTEST_OS_WINDOWS
-    fflush(nullptr);
-    dup2(captured_fd, fd_);
-    close(captured_fd);
-  }
-
-  ~CapturedStream() {
-    remove(filename_.c_str());
-  }
-
-  std::string GetCapturedString() {
-    if (uncaptured_fd_ != -1) {
-      // Restores the original stream.
-      fflush(nullptr);
-      dup2(uncaptured_fd_, fd_);
-      close(uncaptured_fd_);
-      uncaptured_fd_ = -1;
-    }
-
-    FILE* const file = posix::FOpen(filename_.c_str(), "r");
-    if (file == nullptr) {
-      GTEST_LOG_(FATAL) << "Failed to open tmp file " << filename_
-                        << " for capturing stream.";
-    }
-    const std::string content = ReadEntireFile(file);
-    posix::FClose(file);
-    return content;
-  }
-
- private:
-  const int fd_;  // A stream to capture.
-  int uncaptured_fd_;
-  // Name of the temporary file holding the stderr output.
-  ::std::string filename_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
-};
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-static CapturedStream* g_captured_stderr = nullptr;
-static CapturedStream* g_captured_stdout = nullptr;
-
-// Starts capturing an output stream (stdout/stderr).
-static void CaptureStream(int fd, const char* stream_name,
-                          CapturedStream** stream) {
-  if (*stream != nullptr) {
-    GTEST_LOG_(FATAL) << "Only one " << stream_name
-                      << " capturer can exist at a time.";
-  }
-  *stream = new CapturedStream(fd);
-}
-
-// Stops capturing the output stream and returns the captured string.
-static std::string GetCapturedStream(CapturedStream** captured_stream) {
-  const std::string content = (*captured_stream)->GetCapturedString();
-
-  delete *captured_stream;
-  *captured_stream = nullptr;
-
-  return content;
-}
-
-// Starts capturing stdout.
-void CaptureStdout() {
-  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
-}
-
-// Starts capturing stderr.
-void CaptureStderr() {
-  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
-}
-
-// Stops capturing stdout and returns the captured string.
-std::string GetCapturedStdout() {
-  return GetCapturedStream(&g_captured_stdout);
-}
-
-// Stops capturing stderr and returns the captured string.
-std::string GetCapturedStderr() {
-  return GetCapturedStream(&g_captured_stderr);
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-
-
-
-
-size_t GetFileSize(FILE* file) {
-  fseek(file, 0, SEEK_END);
-  return static_cast<size_t>(ftell(file));
-}
-
-std::string ReadEntireFile(FILE* file) {
-  const size_t file_size = GetFileSize(file);
-  char* const buffer = new char[file_size];
-
-  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
-  size_t bytes_read = 0;       // # of bytes read so far
-
-  fseek(file, 0, SEEK_SET);
-
-  // Keeps reading the file until we cannot read further or the
-  // pre-determined file size is reached.
-  do {
-    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
-    bytes_read += bytes_last_read;
-  } while (bytes_last_read > 0 && bytes_read < file_size);
-
-  const std::string content(buffer, bytes_read);
-  delete[] buffer;
-
-  return content;
-}
-
-#if GTEST_HAS_DEATH_TEST
-static const std::vector<std::string>* g_injected_test_argvs =
-    nullptr;  // Owned.
-
-std::vector<std::string> GetInjectableArgvs() {
-  if (g_injected_test_argvs != nullptr) {
-    return *g_injected_test_argvs;
-  }
-  return GetArgvs();
-}
-
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs) {
-  if (g_injected_test_argvs != new_argvs) delete g_injected_test_argvs;
-  g_injected_test_argvs = new_argvs;
-}
-
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs) {
-  SetInjectableArgvs(
-      new std::vector<std::string>(new_argvs.begin(), new_argvs.end()));
-}
-
-void ClearInjectableArgvs() {
-  delete g_injected_test_argvs;
-  g_injected_test_argvs = nullptr;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-#if GTEST_OS_WINDOWS_MOBILE
-namespace posix {
-void Abort() {
-  DebugBreak();
-  TerminateProcess(GetCurrentProcess(), 1);
-}
-}  // namespace posix
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "GTEST_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string full_flag =
-      (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
-
-  Message env_var;
-  for (size_t i = 0; i != full_flag.length(); i++) {
-    env_var << ToUpper(full_flag.c_str()[i]);
-  }
-
-  return env_var.GetString();
-}
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const Message& src_text, const char* str, int32_t* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value \"" << str << "\".\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  // Is the parsed value in the range of an int32_t?
-  const auto result = static_cast<int32_t>(long_value);
-  if (long_value == LONG_MAX || long_value == LONG_MIN ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an int32_t.
-      ) {
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value " << str << ", which overflows.\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true if and only if it's not "0".
-bool BoolFromGTestEnv(const char* flag, bool default_value) {
-#if defined(GTEST_GET_BOOL_FROM_ENV_)
-  return GTEST_GET_BOOL_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  return string_value == nullptr ? default_value
-                                 : strcmp(string_value, "0") != 0;
-#endif  // defined(GTEST_GET_BOOL_FROM_ENV_)
-}
-
-// Reads and returns a 32-bit integer stored in the environment
-// variable corresponding to the given flag; if it isn't set or
-// doesn't represent a valid 32-bit integer, returns default_value.
-int32_t Int32FromGTestEnv(const char* flag, int32_t default_value) {
-#if defined(GTEST_GET_INT32_FROM_ENV_)
-  return GTEST_GET_INT32_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  if (string_value == nullptr) {
-    // The environment variable is not set.
-    return default_value;
-  }
-
-  int32_t result = default_value;
-  if (!ParseInt32(Message() << "Environment variable " << env_var,
-                  string_value, &result)) {
-    printf("The default value %s is used.\n",
-           (Message() << default_value).GetString().c_str());
-    fflush(stdout);
-    return default_value;
-  }
-
-  return result;
-#endif  // defined(GTEST_GET_INT32_FROM_ENV_)
-}
-
-// As a special case for the 'output' flag, if GTEST_OUTPUT is not
-// set, we look for XML_OUTPUT_FILE, which is set by the Bazel build
-// system.  The value of XML_OUTPUT_FILE is a filename without the
-// "xml:" prefix of GTEST_OUTPUT.
-// Note that this is meant to be called at the call site so it does
-// not check that the flag is 'output'
-// In essence this checks an env variable called XML_OUTPUT_FILE
-// and if it is set we prepend "xml:" to its value, if it not set we return ""
-std::string OutputFlagAlsoCheckEnvVar(){
-  std::string default_value_for_output_flag = "";
-  const char* xml_output_file_env = posix::GetEnv("XML_OUTPUT_FILE");
-  if (nullptr != xml_output_file_env) {
-    default_value_for_output_flag = std::string("xml:") + xml_output_file_env;
-  }
-  return default_value_for_output_flag;
-}
-
-// Reads and returns the string environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-const char* StringFromGTestEnv(const char* flag, const char* default_value) {
-#if defined(GTEST_GET_STRING_FROM_ENV_)
-  return GTEST_GET_STRING_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = posix::GetEnv(env_var.c_str());
-  return value == nullptr ? default_value : value;
-#endif  // defined(GTEST_GET_STRING_FROM_ENV_)
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest-printers.cc b/third_party/googletest/googletest/src/gtest-printers.cc
deleted file mode 100644
index 1b68fcb..0000000
--- a/third_party/googletest/googletest/src/gtest-printers.cc
+++ /dev/null
@@ -1,533 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// It uses the << operator when possible, and prints the bytes in the
-// object otherwise.  A user can override its behavior for a class
-// type Foo by defining either operator<<(::std::ostream&, const Foo&)
-// or void PrintTo(const Foo&, ::std::ostream*) in the namespace that
-// defines Foo.
-
-#include "gtest/gtest-printers.h"
-
-#include <stdio.h>
-
-#include <cctype>
-#include <cstdint>
-#include <cwchar>
-#include <ostream>  // NOLINT
-#include <string>
-#include <type_traits>
-
-#include "gtest/internal/gtest-port.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-namespace {
-
-using ::std::ostream;
-
-// Prints a segment of bytes in the given object.
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
-                                size_t count, ostream* os) {
-  char text[5] = "";
-  for (size_t i = 0; i != count; i++) {
-    const size_t j = start + i;
-    if (i != 0) {
-      // Organizes the bytes into groups of 2 for easy parsing by
-      // human.
-      if ((j % 2) == 0)
-        *os << ' ';
-      else
-        *os << '-';
-    }
-    GTEST_SNPRINTF_(text, sizeof(text), "%02X", obj_bytes[j]);
-    *os << text;
-  }
-}
-
-// Prints the bytes in the given value to the given ostream.
-void PrintBytesInObjectToImpl(const unsigned char* obj_bytes, size_t count,
-                              ostream* os) {
-  // Tells the user how big the object is.
-  *os << count << "-byte object <";
-
-  const size_t kThreshold = 132;
-  const size_t kChunkSize = 64;
-  // If the object size is bigger than kThreshold, we'll have to omit
-  // some details by printing only the first and the last kChunkSize
-  // bytes.
-  if (count < kThreshold) {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, count, os);
-  } else {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, kChunkSize, os);
-    *os << " ... ";
-    // Rounds up to 2-byte boundary.
-    const size_t resume_pos = (count - kChunkSize + 1)/2*2;
-    PrintByteSegmentInObjectTo(obj_bytes, resume_pos, count - resume_pos, os);
-  }
-  *os << ">";
-}
-
-// Helpers for widening a character to char32_t. Since the standard does not
-// specify if char / wchar_t is signed or unsigned, it is important to first
-// convert it to the unsigned type of the same width before widening it to
-// char32_t.
-template <typename CharType>
-char32_t ToChar32(CharType in) {
-  return static_cast<char32_t>(
-      static_cast<typename std::make_unsigned<CharType>::type>(in));
-}
-
-}  // namespace
-
-namespace internal {
-
-// Delegates to PrintBytesInObjectToImpl() to print the bytes in the
-// given object.  The delegation simplifies the implementation, which
-// uses the << operator and thus is easier done outside of the
-// ::testing::internal namespace, which contains a << operator that
-// sometimes conflicts with the one in STL.
-void PrintBytesInObjectTo(const unsigned char* obj_bytes, size_t count,
-                          ostream* os) {
-  PrintBytesInObjectToImpl(obj_bytes, count, os);
-}
-
-// Depending on the value of a char (or wchar_t), we print it in one
-// of three formats:
-//   - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
-//   - as a hexadecimal escape sequence (e.g. '\x7F'), or
-//   - as a special escape sequence (e.g. '\r', '\n').
-enum CharFormat {
-  kAsIs,
-  kHexEscape,
-  kSpecialEscape
-};
-
-// Returns true if c is a printable ASCII character.  We test the
-// value of c directly instead of calling isprint(), which is buggy on
-// Windows Mobile.
-inline bool IsPrintableAscii(char32_t c) { return 0x20 <= c && c <= 0x7E; }
-
-// Prints c (of type char, char8_t, char16_t, char32_t, or wchar_t) as a
-// character literal without the quotes, escaping it when necessary; returns how
-// c was formatted.
-template <typename Char>
-static CharFormat PrintAsCharLiteralTo(Char c, ostream* os) {
-  const char32_t u_c = ToChar32(c);
-  switch (u_c) {
-    case L'\0':
-      *os << "\\0";
-      break;
-    case L'\'':
-      *os << "\\'";
-      break;
-    case L'\\':
-      *os << "\\\\";
-      break;
-    case L'\a':
-      *os << "\\a";
-      break;
-    case L'\b':
-      *os << "\\b";
-      break;
-    case L'\f':
-      *os << "\\f";
-      break;
-    case L'\n':
-      *os << "\\n";
-      break;
-    case L'\r':
-      *os << "\\r";
-      break;
-    case L'\t':
-      *os << "\\t";
-      break;
-    case L'\v':
-      *os << "\\v";
-      break;
-    default:
-      if (IsPrintableAscii(u_c)) {
-        *os << static_cast<char>(c);
-        return kAsIs;
-      } else {
-        ostream::fmtflags flags = os->flags();
-        *os << "\\x" << std::hex << std::uppercase << static_cast<int>(u_c);
-        os->flags(flags);
-        return kHexEscape;
-      }
-  }
-  return kSpecialEscape;
-}
-
-// Prints a char32_t c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char32_t c, ostream* os) {
-  switch (c) {
-    case L'\'':
-      *os << "'";
-      return kAsIs;
-    case L'"':
-      *os << "\\\"";
-      return kSpecialEscape;
-    default:
-      return PrintAsCharLiteralTo(c, os);
-  }
-}
-
-static const char* GetCharWidthPrefix(char) {
-  return "";
-}
-
-static const char* GetCharWidthPrefix(signed char) {
-  return "";
-}
-
-static const char* GetCharWidthPrefix(unsigned char) {
-  return "";
-}
-
-#ifdef __cpp_char8_t
-static const char* GetCharWidthPrefix(char8_t) {
-  return "u8";
-}
-#endif
-
-static const char* GetCharWidthPrefix(char16_t) {
-  return "u";
-}
-
-static const char* GetCharWidthPrefix(char32_t) {
-  return "U";
-}
-
-static const char* GetCharWidthPrefix(wchar_t) {
-  return "L";
-}
-
-// Prints a char c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-
-#ifdef __cpp_char8_t
-static CharFormat PrintAsStringLiteralTo(char8_t c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-#endif
-
-static CharFormat PrintAsStringLiteralTo(char16_t c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-
-static CharFormat PrintAsStringLiteralTo(wchar_t c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-
-// Prints a character c (of type char, char8_t, char16_t, char32_t, or wchar_t)
-// and its code. '\0' is printed as "'\\0'", other unprintable characters are
-// also properly escaped using the standard C++ escape sequence.
-template <typename Char>
-void PrintCharAndCodeTo(Char c, ostream* os) {
-  // First, print c as a literal in the most readable form we can find.
-  *os << GetCharWidthPrefix(c) << "'";
-  const CharFormat format = PrintAsCharLiteralTo(c, os);
-  *os << "'";
-
-  // To aid user debugging, we also print c's code in decimal, unless
-  // it's 0 (in which case c was printed as '\\0', making the code
-  // obvious).
-  if (c == 0)
-    return;
-  *os << " (" << static_cast<int>(c);
-
-  // For more convenience, we print c's code again in hexadecimal,
-  // unless c was already printed in the form '\x##' or the code is in
-  // [1, 9].
-  if (format == kHexEscape || (1 <= c && c <= 9)) {
-    // Do nothing.
-  } else {
-    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
-  }
-  *os << ")";
-}
-
-void PrintTo(unsigned char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
-void PrintTo(signed char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
-
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its code.  L'\0' is printed as "L'\\0'".
-void PrintTo(wchar_t wc, ostream* os) { PrintCharAndCodeTo(wc, os); }
-
-// TODO(dcheng): Consider making this delegate to PrintCharAndCodeTo() as well.
-void PrintTo(char32_t c, ::std::ostream* os) {
-  *os << std::hex << "U+" << std::uppercase << std::setfill('0') << std::setw(4)
-      << static_cast<uint32_t>(c);
-}
-
-// Prints the given array of characters to the ostream.  CharType must be either
-// char, char8_t, char16_t, char32_t, or wchar_t.
-// The array starts at begin, the length is len, it may include '\0' characters
-// and may not be NUL-terminated.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static CharFormat PrintCharsAsStringTo(
-    const CharType* begin, size_t len, ostream* os) {
-  const char* const quote_prefix = GetCharWidthPrefix(*begin);
-  *os << quote_prefix << "\"";
-  bool is_previous_hex = false;
-  CharFormat print_format = kAsIs;
-  for (size_t index = 0; index < len; ++index) {
-    const CharType cur = begin[index];
-    if (is_previous_hex && IsXDigit(cur)) {
-      // Previous character is of '\x..' form and this character can be
-      // interpreted as another hexadecimal digit in its number. Break string to
-      // disambiguate.
-      *os << "\" " << quote_prefix << "\"";
-    }
-    is_previous_hex = PrintAsStringLiteralTo(cur, os) == kHexEscape;
-    // Remember if any characters required hex escaping.
-    if (is_previous_hex) {
-      print_format = kHexEscape;
-    }
-  }
-  *os << "\"";
-  return print_format;
-}
-
-// Prints a (const) char/wchar_t array of 'len' elements, starting at address
-// 'begin'.  CharType must be either char or wchar_t.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static void UniversalPrintCharArray(
-    const CharType* begin, size_t len, ostream* os) {
-  // The code
-  //   const char kFoo[] = "foo";
-  // generates an array of 4, not 3, elements, with the last one being '\0'.
-  //
-  // Therefore when printing a char array, we don't print the last element if
-  // it's '\0', such that the output matches the string literal as it's
-  // written in the source code.
-  if (len > 0 && begin[len - 1] == '\0') {
-    PrintCharsAsStringTo(begin, len - 1, os);
-    return;
-  }
-
-  // If, however, the last element in the array is not '\0', e.g.
-  //    const char kFoo[] = { 'f', 'o', 'o' };
-  // we must print the entire array.  We also print a message to indicate
-  // that the array is not NUL-terminated.
-  PrintCharsAsStringTo(begin, len, os);
-  *os << " (no terminating NUL)";
-}
-
-// Prints a (const) char array of 'len' elements, starting at address 'begin'.
-void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-#ifdef __cpp_char8_t
-// Prints a (const) char8_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const char8_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-#endif
-
-// Prints a (const) char16_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const char16_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) char32_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const char32_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) wchar_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const wchar_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-namespace {
-
-// Prints a null-terminated C-style string to the ostream.
-template <typename Char>
-void PrintCStringTo(const Char* s, ostream* os) {
-  if (s == nullptr) {
-    *os << "NULL";
-  } else {
-    *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, std::char_traits<Char>::length(s), os);
-  }
-}
-
-}  // anonymous namespace
-
-void PrintTo(const char* s, ostream* os) { PrintCStringTo(s, os); }
-
-#ifdef __cpp_char8_t
-void PrintTo(const char8_t* s, ostream* os) { PrintCStringTo(s, os); }
-#endif
-
-void PrintTo(const char16_t* s, ostream* os) { PrintCStringTo(s, os); }
-
-void PrintTo(const char32_t* s, ostream* os) { PrintCStringTo(s, os); }
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Prints the given wide C string to the ostream.
-void PrintTo(const wchar_t* s, ostream* os) { PrintCStringTo(s, os); }
-#endif  // wchar_t is native
-
-namespace {
-
-bool ContainsUnprintableControlCodes(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length; i++) {
-    unsigned char ch = *s++;
-    if (std::iscntrl(ch)) {
-        switch (ch) {
-        case '\t':
-        case '\n':
-        case '\r':
-          break;
-        default:
-          return true;
-        }
-      }
-  }
-  return false;
-}
-
-bool IsUTF8TrailByte(unsigned char t) { return 0x80 <= t && t<= 0xbf; }
-
-bool IsValidUTF8(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length;) {
-    unsigned char lead = s[i++];
-
-    if (lead <= 0x7f) {
-      continue;  // single-byte character (ASCII) 0..7F
-    }
-    if (lead < 0xc2) {
-      return false;  // trail byte or non-shortest form
-    } else if (lead <= 0xdf && (i + 1) <= length && IsUTF8TrailByte(s[i])) {
-      ++i;  // 2-byte character
-    } else if (0xe0 <= lead && lead <= 0xef && (i + 2) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               // check for non-shortest form and surrogate
-               (lead != 0xe0 || s[i] >= 0xa0) &&
-               (lead != 0xed || s[i] < 0xa0)) {
-      i += 2;  // 3-byte character
-    } else if (0xf0 <= lead && lead <= 0xf4 && (i + 3) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               IsUTF8TrailByte(s[i + 2]) &&
-               // check for non-shortest form
-               (lead != 0xf0 || s[i] >= 0x90) &&
-               (lead != 0xf4 || s[i] < 0x90)) {
-      i += 3;  // 4-byte character
-    } else {
-      return false;
-    }
-  }
-  return true;
-}
-
-void ConditionalPrintAsText(const char* str, size_t length, ostream* os) {
-  if (!ContainsUnprintableControlCodes(str, length) &&
-      IsValidUTF8(str, length)) {
-    *os << "\n    As Text: \"" << str << "\"";
-  }
-}
-
-}  // anonymous namespace
-
-void PrintStringTo(const ::std::string& s, ostream* os) {
-  if (PrintCharsAsStringTo(s.data(), s.size(), os) == kHexEscape) {
-    if (GTEST_FLAG(print_utf8)) {
-      ConditionalPrintAsText(s.data(), s.size(), os);
-    }
-  }
-}
-
-#ifdef __cpp_char8_t
-void PrintU8StringTo(const ::std::u8string& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif
-
-void PrintU16StringTo(const ::std::u16string& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-
-void PrintU32StringTo(const ::std::u32string& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-
-#if GTEST_HAS_STD_WSTRING
-void PrintWideStringTo(const ::std::wstring& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-}  // namespace internal
-
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest-test-part.cc b/third_party/googletest/googletest/src/gtest-test-part.cc
deleted file mode 100644
index a938683..0000000
--- a/third_party/googletest/googletest/src/gtest-test-part.cc
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-#include "gtest/gtest-test-part.h"
-
-#include "gtest/internal/gtest-port.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-using internal::GetUnitTestImpl;
-
-// Gets the summary of the failure message by omitting the stack trace
-// in it.
-std::string TestPartResult::ExtractSummary(const char* message) {
-  const char* const stack_trace = strstr(message, internal::kStackTraceMarker);
-  return stack_trace == nullptr ? message : std::string(message, stack_trace);
-}
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result) {
-  return os << internal::FormatFileLocation(result.file_name(),
-                                            result.line_number())
-            << " "
-            << (result.type() == TestPartResult::kSuccess
-                    ? "Success"
-                    : result.type() == TestPartResult::kSkip
-                          ? "Skipped"
-                          : result.type() == TestPartResult::kFatalFailure
-                                ? "Fatal failure"
-                                : "Non-fatal failure")
-            << ":\n"
-            << result.message() << std::endl;
-}
-
-// Appends a TestPartResult to the array.
-void TestPartResultArray::Append(const TestPartResult& result) {
-  array_.push_back(result);
-}
-
-// Returns the TestPartResult at the given index (0-based).
-const TestPartResult& TestPartResultArray::GetTestPartResult(int index) const {
-  if (index < 0 || index >= size()) {
-    printf("\nInvalid index (%d) into TestPartResultArray.\n", index);
-    internal::posix::Abort();
-  }
-
-  return array_[static_cast<size_t>(index)];
-}
-
-// Returns the number of TestPartResult objects in the array.
-int TestPartResultArray::size() const {
-  return static_cast<int>(array_.size());
-}
-
-namespace internal {
-
-HasNewFatalFailureHelper::HasNewFatalFailureHelper()
-    : has_new_fatal_failure_(false),
-      original_reporter_(GetUnitTestImpl()->
-                         GetTestPartResultReporterForCurrentThread()) {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(this);
-}
-
-HasNewFatalFailureHelper::~HasNewFatalFailureHelper() {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(
-      original_reporter_);
-}
-
-void HasNewFatalFailureHelper::ReportTestPartResult(
-    const TestPartResult& result) {
-  if (result.fatally_failed())
-    has_new_fatal_failure_ = true;
-  original_reporter_->ReportTestPartResult(result);
-}
-
-}  // namespace internal
-
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest-typed-test.cc b/third_party/googletest/googletest/src/gtest-typed-test.cc
deleted file mode 100644
index c02c3df..0000000
--- a/third_party/googletest/googletest/src/gtest-typed-test.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest-typed-test.h"
-
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace internal {
-
-// Skips to the first non-space char in str. Returns an empty string if str
-// contains only whitespace characters.
-static const char* SkipSpaces(const char* str) {
-  while (IsSpace(*str))
-    str++;
-  return str;
-}
-
-static std::vector<std::string> SplitIntoTestNames(const char* src) {
-  std::vector<std::string> name_vec;
-  src = SkipSpaces(src);
-  for (; src != nullptr; src = SkipComma(src)) {
-    name_vec.push_back(StripTrailingSpaces(GetPrefixUntilComma(src)));
-  }
-  return name_vec;
-}
-
-// Verifies that registered_tests match the test names in
-// registered_tests_; returns registered_tests if successful, or
-// aborts the program otherwise.
-const char* TypedTestSuitePState::VerifyRegisteredTestNames(
-    const char* test_suite_name, const char* file, int line,
-    const char* registered_tests) {
-  RegisterTypeParameterizedTestSuite(test_suite_name, CodeLocation(file, line));
-
-  typedef RegisteredTestsMap::const_iterator RegisteredTestIter;
-  registered_ = true;
-
-  std::vector<std::string> name_vec = SplitIntoTestNames(registered_tests);
-
-  Message errors;
-
-  std::set<std::string> tests;
-  for (std::vector<std::string>::const_iterator name_it = name_vec.begin();
-       name_it != name_vec.end(); ++name_it) {
-    const std::string& name = *name_it;
-    if (tests.count(name) != 0) {
-      errors << "Test " << name << " is listed more than once.\n";
-      continue;
-    }
-
-    if (registered_tests_.count(name) != 0) {
-      tests.insert(name);
-    } else {
-      errors << "No test named " << name
-             << " can be found in this test suite.\n";
-    }
-  }
-
-  for (RegisteredTestIter it = registered_tests_.begin();
-       it != registered_tests_.end();
-       ++it) {
-    if (tests.count(it->first) == 0) {
-      errors << "You forgot to list test " << it->first << ".\n";
-    }
-  }
-
-  const std::string& errors_str = errors.GetString();
-  if (errors_str != "") {
-    fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
-            errors_str.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-
-  return registered_tests;
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest.cc b/third_party/googletest/googletest/src/gtest.cc
deleted file mode 100644
index 21c611a..0000000
--- a/third_party/googletest/googletest/src/gtest.cc
+++ /dev/null
@@ -1,6746 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-#include "gtest/gtest-spi.h"
-
-#include <ctype.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include <algorithm>
-#include <chrono>  // NOLINT
-#include <cmath>
-#include <cstdint>
-#include <iomanip>
-#include <limits>
-#include <list>
-#include <map>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <vector>
-
-#if GTEST_OS_LINUX
-
-# include <fcntl.h>  // NOLINT
-# include <limits.h>  // NOLINT
-# include <sched.h>  // NOLINT
-// Declares vsnprintf().  This header is not available on Windows.
-# include <strings.h>  // NOLINT
-# include <sys/mman.h>  // NOLINT
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-# include <string>
-
-#elif GTEST_OS_ZOS
-# include <sys/time.h>  // NOLINT
-
-// On z/OS we additionally need strings.h for strcasecmp.
-# include <strings.h>  // NOLINT
-
-#elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-#elif GTEST_OS_WINDOWS  // We are on Windows proper.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-#ifdef _MSC_VER
-# include <crtdbg.h>  // NOLINT
-#endif
-
-# include <io.h>  // NOLINT
-# include <sys/timeb.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-# include <sys/stat.h>  // NOLINT
-
-# if GTEST_OS_WINDOWS_MINGW
-#  include <sys/time.h>  // NOLINT
-# endif  // GTEST_OS_WINDOWS_MINGW
-
-#else
-
-// cpplint thinks that the header is already included, so we want to
-// silence it.
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-# include <sys/socket.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-#endif
-
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_OS_WINDOWS
-# define vsnprintf _vsnprintf
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-#include <crt_externs.h>
-#endif
-#endif
-
-#if GTEST_HAS_ABSL
-#include "absl/debugging/failure_signal_handler.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/strings/str_cat.h"
-#endif  // GTEST_HAS_ABSL
-
-namespace testing {
-
-using internal::CountIf;
-using internal::ForEach;
-using internal::GetElementOr;
-using internal::Shuffle;
-
-// Constants.
-
-// A test whose test suite name or test name matches this filter is
-// disabled and not run.
-static const char kDisableTestFilter[] = "DISABLED_*:*/DISABLED_*";
-
-// A test suite whose name matches this filter is considered a death
-// test suite and will be run before test suites whose name doesn't
-// match this filter.
-static const char kDeathTestSuiteFilter[] = "*DeathTest:*DeathTest/*";
-
-// A test filter that matches everything.
-static const char kUniversalFilter[] = "*";
-
-// The default output format.
-static const char kDefaultOutputFormat[] = "xml";
-// The default output file.
-static const char kDefaultOutputFile[] = "test_detail";
-
-// The environment variable name for the test shard index.
-static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
-// The environment variable name for the total number of test shards.
-static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
-// The environment variable name for the test shard status file.
-static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";
-
-namespace internal {
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-const char kStackTraceMarker[] = "\nStack trace:\n";
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-bool g_help_flag = false;
-
-// Utilty function to Open File for Writing
-static FILE* OpenFileForWriting(const std::string& output_file) {
-  FILE* fileout = nullptr;
-  FilePath output_file_path(output_file);
-  FilePath output_dir(output_file_path.RemoveFileName());
-
-  if (output_dir.CreateDirectoriesRecursively()) {
-    fileout = posix::FOpen(output_file.c_str(), "w");
-  }
-  if (fileout == nullptr) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << output_file << "\"";
-  }
-  return fileout;
-}
-
-}  // namespace internal
-
-// Bazel passes in the argument to '--test_filter' via the TESTBRIDGE_TEST_ONLY
-// environment variable.
-static const char* GetDefaultFilter() {
-  const char* const testbridge_test_only =
-      internal::posix::GetEnv("TESTBRIDGE_TEST_ONLY");
-  if (testbridge_test_only != nullptr) {
-    return testbridge_test_only;
-  }
-  return kUniversalFilter;
-}
-
-// Bazel passes in the argument to '--test_runner_fail_fast' via the
-// TESTBRIDGE_TEST_RUNNER_FAIL_FAST environment variable.
-static bool GetDefaultFailFast() {
-  const char* const testbridge_test_runner_fail_fast =
-      internal::posix::GetEnv("TESTBRIDGE_TEST_RUNNER_FAIL_FAST");
-  if (testbridge_test_runner_fail_fast != nullptr) {
-    return strcmp(testbridge_test_runner_fail_fast, "1") == 0;
-  }
-  return false;
-}
-
-GTEST_DEFINE_bool_(
-    fail_fast, internal::BoolFromGTestEnv("fail_fast", GetDefaultFailFast()),
-    "True if and only if a test failure should stop further test execution.");
-
-GTEST_DEFINE_bool_(
-    also_run_disabled_tests,
-    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
-    "Run disabled tests too, in addition to the tests normally being run.");
-
-GTEST_DEFINE_bool_(
-    break_on_failure, internal::BoolFromGTestEnv("break_on_failure", false),
-    "True if and only if a failed assertion should be a debugger "
-    "break-point.");
-
-GTEST_DEFINE_bool_(catch_exceptions,
-                   internal::BoolFromGTestEnv("catch_exceptions", true),
-                   "True if and only if " GTEST_NAME_
-                   " should catch exceptions and treat them as test failures.");
-
-GTEST_DEFINE_string_(
-    color,
-    internal::StringFromGTestEnv("color", "auto"),
-    "Whether to use colors in the output.  Valid values: yes, no, "
-    "and auto.  'auto' means to use colors if the output is "
-    "being sent to a terminal and the TERM environment variable "
-    "is set to a terminal type that supports colors.");
-
-GTEST_DEFINE_string_(
-    filter,
-    internal::StringFromGTestEnv("filter", GetDefaultFilter()),
-    "A colon-separated list of glob (not regex) patterns "
-    "for filtering the tests to run, optionally followed by a "
-    "'-' and a : separated list of negative patterns (tests to "
-    "exclude).  A test is run if it matches one of the positive "
-    "patterns and does not match any of the negative patterns.");
-
-GTEST_DEFINE_bool_(
-    install_failure_signal_handler,
-    internal::BoolFromGTestEnv("install_failure_signal_handler", false),
-    "If true and supported on the current platform, " GTEST_NAME_ " should "
-    "install a signal handler that dumps debugging information when fatal "
-    "signals are raised.");
-
-GTEST_DEFINE_bool_(list_tests, false,
-                   "List all tests without running them.");
-
-// The net priority order after flag processing is thus:
-//   --gtest_output command line flag
-//   GTEST_OUTPUT environment variable
-//   XML_OUTPUT_FILE environment variable
-//   ''
-GTEST_DEFINE_string_(
-    output,
-    internal::StringFromGTestEnv("output",
-      internal::OutputFlagAlsoCheckEnvVar().c_str()),
-    "A format (defaults to \"xml\" but can be specified to be \"json\"), "
-    "optionally followed by a colon and an output file name or directory. "
-    "A directory is indicated by a trailing pathname separator. "
-    "Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
-    "If a directory is specified, output files will be created "
-    "within that directory, with file-names based on the test "
-    "executable's name and, if necessary, made unique by adding "
-    "digits.");
-
-GTEST_DEFINE_bool_(
-    brief, internal::BoolFromGTestEnv("brief", false),
-    "True if only test failures should be displayed in text output.");
-
-GTEST_DEFINE_bool_(print_time, internal::BoolFromGTestEnv("print_time", true),
-                   "True if and only if " GTEST_NAME_
-                   " should display elapsed time in text output.");
-
-GTEST_DEFINE_bool_(print_utf8, internal::BoolFromGTestEnv("print_utf8", true),
-                   "True if and only if " GTEST_NAME_
-                   " prints UTF8 characters as text.");
-
-GTEST_DEFINE_int32_(
-    random_seed,
-    internal::Int32FromGTestEnv("random_seed", 0),
-    "Random number seed to use when shuffling test orders.  Must be in range "
-    "[1, 99999], or 0 to use a seed based on the current time.");
-
-GTEST_DEFINE_int32_(
-    repeat,
-    internal::Int32FromGTestEnv("repeat", 1),
-    "How many times to repeat each test.  Specify a negative number "
-    "for repeating forever.  Useful for shaking out flaky tests.");
-
-GTEST_DEFINE_bool_(show_internal_stack_frames, false,
-                   "True if and only if " GTEST_NAME_
-                   " should include internal stack frames when "
-                   "printing test failure stack traces.");
-
-GTEST_DEFINE_bool_(shuffle, internal::BoolFromGTestEnv("shuffle", false),
-                   "True if and only if " GTEST_NAME_
-                   " should randomize tests' order on every run.");
-
-GTEST_DEFINE_int32_(
-    stack_trace_depth,
-    internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
-    "The maximum number of stack frames to print when an "
-    "assertion fails.  The valid range is 0 through 100, inclusive.");
-
-GTEST_DEFINE_string_(
-    stream_result_to,
-    internal::StringFromGTestEnv("stream_result_to", ""),
-    "This flag specifies the host name and the port number on which to stream "
-    "test results. Example: \"localhost:555\". The flag is effective only on "
-    "Linux.");
-
-GTEST_DEFINE_bool_(
-    throw_on_failure,
-    internal::BoolFromGTestEnv("throw_on_failure", false),
-    "When this flag is specified, a failed assertion will throw an exception "
-    "if exceptions are enabled or exit the program with a non-zero code "
-    "otherwise. For use with an external test framework.");
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DEFINE_string_(
-    flagfile,
-    internal::StringFromGTestEnv("flagfile", ""),
-    "This flag specifies the flagfile to read command-line flags from.");
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-namespace internal {
-
-// Generates a random number from [0, range), using a Linear
-// Congruential Generator (LCG).  Crashes if 'range' is 0 or greater
-// than kMaxRange.
-uint32_t Random::Generate(uint32_t range) {
-  // These constants are the same as are used in glibc's rand(3).
-  // Use wider types than necessary to prevent unsigned overflow diagnostics.
-  state_ = static_cast<uint32_t>(1103515245ULL*state_ + 12345U) % kMaxRange;
-
-  GTEST_CHECK_(range > 0)
-      << "Cannot generate a number in the range [0, 0).";
-  GTEST_CHECK_(range <= kMaxRange)
-      << "Generation of a number in [0, " << range << ") was requested, "
-      << "but this can only generate numbers in [0, " << kMaxRange << ").";
-
-  // Converting via modulus introduces a bit of downward bias, but
-  // it's simple, and a linear congruential generator isn't too good
-  // to begin with.
-  return state_ % range;
-}
-
-// GTestIsInitialized() returns true if and only if the user has initialized
-// Google Test.  Useful for catching the user mistake of not initializing
-// Google Test before calling RUN_ALL_TESTS().
-static bool GTestIsInitialized() { return GetArgvs().size() > 0; }
-
-// Iterates over a vector of TestSuites, keeping a running sum of the
-// results of calling a given int-returning method on each.
-// Returns the sum.
-static int SumOverTestSuiteList(const std::vector<TestSuite*>& case_list,
-                                int (TestSuite::*method)() const) {
-  int sum = 0;
-  for (size_t i = 0; i < case_list.size(); i++) {
-    sum += (case_list[i]->*method)();
-  }
-  return sum;
-}
-
-// Returns true if and only if the test suite passed.
-static bool TestSuitePassed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Passed();
-}
-
-// Returns true if and only if the test suite failed.
-static bool TestSuiteFailed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Failed();
-}
-
-// Returns true if and only if test_suite contains at least one test that
-// should run.
-static bool ShouldRunTestSuite(const TestSuite* test_suite) {
-  return test_suite->should_run();
-}
-
-// AssertHelper constructor.
-AssertHelper::AssertHelper(TestPartResult::Type type,
-                           const char* file,
-                           int line,
-                           const char* message)
-    : data_(new AssertHelperData(type, file, line, message)) {
-}
-
-AssertHelper::~AssertHelper() {
-  delete data_;
-}
-
-// Message assignment, for assertion streaming support.
-void AssertHelper::operator=(const Message& message) const {
-  UnitTest::GetInstance()->
-    AddTestPartResult(data_->type, data_->file, data_->line,
-                      AppendUserMessage(data_->message, message),
-                      UnitTest::GetInstance()->impl()
-                      ->CurrentOsStackTraceExceptTop(1)
-                      // Skips the stack frame for this function itself.
-                      );  // NOLINT
-}
-
-namespace {
-
-// When TEST_P is found without a matching INSTANTIATE_TEST_SUITE_P
-// to creates test cases for it, a syntetic test case is
-// inserted to report ether an error or a log message.
-//
-// This configuration bit will likely be removed at some point.
-constexpr bool kErrorOnUninstantiatedParameterizedTest = true;
-constexpr bool kErrorOnUninstantiatedTypeParameterizedTest = true;
-
-// A test that fails at a given file/line location with a given message.
-class FailureTest : public Test {
- public:
-  explicit FailureTest(const CodeLocation& loc, std::string error_message,
-                       bool as_error)
-      : loc_(loc),
-        error_message_(std::move(error_message)),
-        as_error_(as_error) {}
-
-  void TestBody() override {
-    if (as_error_) {
-      AssertHelper(TestPartResult::kNonFatalFailure, loc_.file.c_str(),
-                   loc_.line, "") = Message() << error_message_;
-    } else {
-      std::cout << error_message_ << std::endl;
-    }
-  }
-
- private:
-  const CodeLocation loc_;
-  const std::string error_message_;
-  const bool as_error_;
-};
-
-
-}  // namespace
-
-std::set<std::string>* GetIgnoredParameterizedTestSuites() {
-  return UnitTest::GetInstance()->impl()->ignored_parameterized_test_suites();
-}
-
-// Add a given test_suit to the list of them allow to go un-instantiated.
-MarkAsIgnored::MarkAsIgnored(const char* test_suite) {
-  GetIgnoredParameterizedTestSuites()->insert(test_suite);
-}
-
-// If this parameterized test suite has no instantiations (and that
-// has not been marked as okay), emit a test case reporting that.
-void InsertSyntheticTestCase(const std::string& name, CodeLocation location,
-                             bool has_test_p) {
-  const auto& ignored = *GetIgnoredParameterizedTestSuites();
-  if (ignored.find(name) != ignored.end()) return;
-
-  const char kMissingInstantiation[] =  //
-      " is defined via TEST_P, but never instantiated. None of the test cases "
-      "will run. Either no INSTANTIATE_TEST_SUITE_P is provided or the only "
-      "ones provided expand to nothing."
-      "\n\n"
-      "Ideally, TEST_P definitions should only ever be included as part of "
-      "binaries that intend to use them. (As opposed to, for example, being "
-      "placed in a library that may be linked in to get other utilities.)";
-
-  const char kMissingTestCase[] =  //
-      " is instantiated via INSTANTIATE_TEST_SUITE_P, but no tests are "
-      "defined via TEST_P . No test cases will run."
-      "\n\n"
-      "Ideally, INSTANTIATE_TEST_SUITE_P should only ever be invoked from "
-      "code that always depend on code that provides TEST_P. Failing to do "
-      "so is often an indication of dead code, e.g. the last TEST_P was "
-      "removed but the rest got left behind.";
-
-  std::string message =
-      "Parameterized test suite " + name +
-      (has_test_p ? kMissingInstantiation : kMissingTestCase) +
-      "\n\n"
-      "To suppress this error for this test suite, insert the following line "
-      "(in a non-header) in the namespace it is defined in:"
-      "\n\n"
-      "GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(" + name + ");";
-
-  std::string full_name = "UninstantiatedParameterizedTestSuite<" + name + ">";
-  RegisterTest(  //
-      "GoogleTestVerification", full_name.c_str(),
-      nullptr,  // No type parameter.
-      nullptr,  // No value parameter.
-      location.file.c_str(), location.line, [message, location] {
-        return new FailureTest(location, message,
-                               kErrorOnUninstantiatedParameterizedTest);
-      });
-}
-
-void RegisterTypeParameterizedTestSuite(const char* test_suite_name,
-                                        CodeLocation code_location) {
-  GetUnitTestImpl()->type_parameterized_test_registry().RegisterTestSuite(
-      test_suite_name, code_location);
-}
-
-void RegisterTypeParameterizedTestSuiteInstantiation(const char* case_name) {
-  GetUnitTestImpl()
-      ->type_parameterized_test_registry()
-      .RegisterInstantiation(case_name);
-}
-
-void TypeParameterizedTestSuiteRegistry::RegisterTestSuite(
-    const char* test_suite_name, CodeLocation code_location) {
-  suites_.emplace(std::string(test_suite_name),
-                 TypeParameterizedTestSuiteInfo(code_location));
-}
-
-void TypeParameterizedTestSuiteRegistry::RegisterInstantiation(
-        const char* test_suite_name) {
-  auto it = suites_.find(std::string(test_suite_name));
-  if (it != suites_.end()) {
-    it->second.instantiated = true;
-  } else {
-    GTEST_LOG_(ERROR) << "Unknown type parameterized test suit '"
-                      << test_suite_name << "'";
-  }
-}
-
-void TypeParameterizedTestSuiteRegistry::CheckForInstantiations() {
-  const auto& ignored = *GetIgnoredParameterizedTestSuites();
-  for (const auto& testcase : suites_) {
-    if (testcase.second.instantiated) continue;
-    if (ignored.find(testcase.first) != ignored.end()) continue;
-
-    std::string message =
-        "Type parameterized test suite " + testcase.first +
-        " is defined via REGISTER_TYPED_TEST_SUITE_P, but never instantiated "
-        "via INSTANTIATE_TYPED_TEST_SUITE_P. None of the test cases will run."
-        "\n\n"
-        "Ideally, TYPED_TEST_P definitions should only ever be included as "
-        "part of binaries that intend to use them. (As opposed to, for "
-        "example, being placed in a library that may be linked in to get other "
-        "utilities.)"
-        "\n\n"
-        "To suppress this error for this test suite, insert the following line "
-        "(in a non-header) in the namespace it is defined in:"
-        "\n\n"
-        "GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(" +
-        testcase.first + ");";
-
-    std::string full_name =
-        "UninstantiatedTypeParameterizedTestSuite<" + testcase.first + ">";
-    RegisterTest(  //
-        "GoogleTestVerification", full_name.c_str(),
-        nullptr,  // No type parameter.
-        nullptr,  // No value parameter.
-        testcase.second.code_location.file.c_str(),
-        testcase.second.code_location.line, [message, testcase] {
-          return new FailureTest(testcase.second.code_location, message,
-                                 kErrorOnUninstantiatedTypeParameterizedTest);
-        });
-  }
-}
-
-// A copy of all command line arguments.  Set by InitGoogleTest().
-static ::std::vector<std::string> g_argvs;
-
-::std::vector<std::string> GetArgvs() {
-#if defined(GTEST_CUSTOM_GET_ARGVS_)
-  // GTEST_CUSTOM_GET_ARGVS_() may return a container of std::string or
-  // ::string. This code converts it to the appropriate type.
-  const auto& custom = GTEST_CUSTOM_GET_ARGVS_();
-  return ::std::vector<std::string>(custom.begin(), custom.end());
-#else   // defined(GTEST_CUSTOM_GET_ARGVS_)
-  return g_argvs;
-#endif  // defined(GTEST_CUSTOM_GET_ARGVS_)
-}
-
-// Returns the current application's name, removing directory path if that
-// is present.
-FilePath GetCurrentExecutableName() {
-  FilePath result;
-
-#if GTEST_OS_WINDOWS || GTEST_OS_OS2
-  result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
-#else
-  result.Set(FilePath(GetArgvs()[0]));
-#endif  // GTEST_OS_WINDOWS
-
-  return result.RemoveDirectoryName();
-}
-
-// Functions for processing the gtest_output flag.
-
-// Returns the output format, or "" for normal printed output.
-std::string UnitTestOptions::GetOutputFormat() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-  const char* const colon = strchr(gtest_output_flag, ':');
-  return (colon == nullptr)
-             ? std::string(gtest_output_flag)
-             : std::string(gtest_output_flag,
-                           static_cast<size_t>(colon - gtest_output_flag));
-}
-
-// Returns the name of the requested output file, or the default if none
-// was explicitly specified.
-std::string UnitTestOptions::GetAbsolutePathToOutputFile() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-
-  std::string format = GetOutputFormat();
-  if (format.empty())
-    format = std::string(kDefaultOutputFormat);
-
-  const char* const colon = strchr(gtest_output_flag, ':');
-  if (colon == nullptr)
-    return internal::FilePath::MakeFileName(
-        internal::FilePath(
-            UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(kDefaultOutputFile), 0,
-        format.c_str()).string();
-
-  internal::FilePath output_name(colon + 1);
-  if (!output_name.IsAbsolutePath())
-    output_name = internal::FilePath::ConcatPaths(
-        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(colon + 1));
-
-  if (!output_name.IsDirectory())
-    return output_name.string();
-
-  internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
-      output_name, internal::GetCurrentExecutableName(),
-      GetOutputFormat().c_str()));
-  return result.string();
-}
-
-// Returns true if and only if the wildcard pattern matches the string. Each
-// pattern consists of regular characters, single-character wildcards (?), and
-// multi-character wildcards (*).
-//
-// This function implements a linear-time string globbing algorithm based on
-// https://research.swtch.com/glob.
-static bool PatternMatchesString(const std::string& name_str,
-                                 const char* pattern, const char* pattern_end) {
-  const char* name = name_str.c_str();
-  const char* const name_begin = name;
-  const char* const name_end = name + name_str.size();
-
-  const char* pattern_next = pattern;
-  const char* name_next = name;
-
-  while (pattern < pattern_end || name < name_end) {
-    if (pattern < pattern_end) {
-      switch (*pattern) {
-        default:  // Match an ordinary character.
-          if (name < name_end && *name == *pattern) {
-            ++pattern;
-            ++name;
-            continue;
-          }
-          break;
-        case '?':  // Match any single character.
-          if (name < name_end) {
-            ++pattern;
-            ++name;
-            continue;
-          }
-          break;
-        case '*':
-          // Match zero or more characters. Start by skipping over the wildcard
-          // and matching zero characters from name. If that fails, restart and
-          // match one more character than the last attempt.
-          pattern_next = pattern;
-          name_next = name + 1;
-          ++pattern;
-          continue;
-      }
-    }
-    // Failed to match a character. Restart if possible.
-    if (name_begin < name_next && name_next <= name_end) {
-      pattern = pattern_next;
-      name = name_next;
-      continue;
-    }
-    return false;
-  }
-  return true;
-}
-
-bool UnitTestOptions::MatchesFilter(const std::string& name_str,
-                                    const char* filter) {
-  // The filter is a list of patterns separated by colons (:).
-  const char* pattern = filter;
-  while (true) {
-    // Find the bounds of this pattern.
-    const char* const next_sep = strchr(pattern, ':');
-    const char* const pattern_end =
-        next_sep != nullptr ? next_sep : pattern + strlen(pattern);
-
-    // Check if this pattern matches name_str.
-    if (PatternMatchesString(name_str, pattern, pattern_end)) {
-      return true;
-    }
-
-    // Give up on this pattern. However, if we found a pattern separator (:),
-    // advance to the next pattern (skipping over the separator) and restart.
-    if (next_sep == nullptr) {
-      return false;
-    }
-    pattern = next_sep + 1;
-  }
-  return true;
-}
-
-// Returns true if and only if the user-specified filter matches the test
-// suite name and the test name.
-bool UnitTestOptions::FilterMatchesTest(const std::string& test_suite_name,
-                                        const std::string& test_name) {
-  const std::string& full_name = test_suite_name + "." + test_name.c_str();
-
-  // Split --gtest_filter at '-', if there is one, to separate into
-  // positive filter and negative filter portions
-  const char* const p = GTEST_FLAG(filter).c_str();
-  const char* const dash = strchr(p, '-');
-  std::string positive;
-  std::string negative;
-  if (dash == nullptr) {
-    positive = GTEST_FLAG(filter).c_str();  // Whole string is a positive filter
-    negative = "";
-  } else {
-    positive = std::string(p, dash);   // Everything up to the dash
-    negative = std::string(dash + 1);  // Everything after the dash
-    if (positive.empty()) {
-      // Treat '-test1' as the same as '*-test1'
-      positive = kUniversalFilter;
-    }
-  }
-
-  // A filter is a colon-separated list of patterns.  It matches a
-  // test if any pattern in it matches the test.
-  return (MatchesFilter(full_name, positive.c_str()) &&
-          !MatchesFilter(full_name, negative.c_str()));
-}
-
-#if GTEST_HAS_SEH
-// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-// This function is useful as an __except condition.
-int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
-  // Google Test should handle a SEH exception if:
-  //   1. the user wants it to, AND
-  //   2. this is not a breakpoint exception, AND
-  //   3. this is not a C++ exception (VC++ implements them via SEH,
-  //      apparently).
-  //
-  // SEH exception code for C++ exceptions.
-  // (see http://support.microsoft.com/kb/185294 for more information).
-  const DWORD kCxxExceptionCode = 0xe06d7363;
-
-  bool should_handle = true;
-
-  if (!GTEST_FLAG(catch_exceptions))
-    should_handle = false;
-  else if (exception_code == EXCEPTION_BREAKPOINT)
-    should_handle = false;
-  else if (exception_code == kCxxExceptionCode)
-    should_handle = false;
-
-  return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
-}
-#endif  // GTEST_HAS_SEH
-
-}  // namespace internal
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results. Intercepts only failures from the current thread.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    TestPartResultArray* result)
-    : intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
-      result_(result) {
-  Init();
-}
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    InterceptMode intercept_mode, TestPartResultArray* result)
-    : intercept_mode_(intercept_mode),
-      result_(result) {
-  Init();
-}
-
-void ScopedFakeTestPartResultReporter::Init() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    old_reporter_ = impl->GetGlobalTestPartResultReporter();
-    impl->SetGlobalTestPartResultReporter(this);
-  } else {
-    old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
-    impl->SetTestPartResultReporterForCurrentThread(this);
-  }
-}
-
-// The d'tor restores the test part result reporter used by Google Test
-// before.
-ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    impl->SetGlobalTestPartResultReporter(old_reporter_);
-  } else {
-    impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
-  }
-}
-
-// Increments the test part result count and remembers the result.
-// This method is from the TestPartResultReporterInterface interface.
-void ScopedFakeTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  result_->Append(result);
-}
-
-namespace internal {
-
-// Returns the type ID of ::testing::Test.  We should always call this
-// instead of GetTypeId< ::testing::Test>() to get the type ID of
-// testing::Test.  This is to work around a suspected linker bug when
-// using Google Test as a framework on Mac OS X.  The bug causes
-// GetTypeId< ::testing::Test>() to return different values depending
-// on whether the call is from the Google Test framework itself or
-// from user test code.  GetTestTypeId() is guaranteed to always
-// return the same value, as it always calls GetTypeId<>() from the
-// gtest.cc, which is within the Google Test framework.
-TypeId GetTestTypeId() {
-  return GetTypeId<Test>();
-}
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();
-
-// This predicate-formatter checks that 'results' contains a test part
-// failure of the given type and that the failure message contains the
-// given substring.
-static AssertionResult HasOneFailure(const char* /* results_expr */,
-                                     const char* /* type_expr */,
-                                     const char* /* substr_expr */,
-                                     const TestPartResultArray& results,
-                                     TestPartResult::Type type,
-                                     const std::string& substr) {
-  const std::string expected(type == TestPartResult::kFatalFailure ?
-                        "1 fatal failure" :
-                        "1 non-fatal failure");
-  Message msg;
-  if (results.size() != 1) {
-    msg << "Expected: " << expected << "\n"
-        << "  Actual: " << results.size() << " failures";
-    for (int i = 0; i < results.size(); i++) {
-      msg << "\n" << results.GetTestPartResult(i);
-    }
-    return AssertionFailure() << msg;
-  }
-
-  const TestPartResult& r = results.GetTestPartResult(0);
-  if (r.type() != type) {
-    return AssertionFailure() << "Expected: " << expected << "\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  if (strstr(r.message(), substr.c_str()) == nullptr) {
-    return AssertionFailure() << "Expected: " << expected << " containing \""
-                              << substr << "\"\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  return AssertionSuccess();
-}
-
-// The constructor of SingleFailureChecker remembers where to look up
-// test part results, what type of failure we expect, and what
-// substring the failure message should contain.
-SingleFailureChecker::SingleFailureChecker(const TestPartResultArray* results,
-                                           TestPartResult::Type type,
-                                           const std::string& substr)
-    : results_(results), type_(type), substr_(substr) {}
-
-// The destructor of SingleFailureChecker verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-SingleFailureChecker::~SingleFailureChecker() {
-  EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
-}
-
-DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->current_test_result()->AddTestPartResult(result);
-  unit_test_->listeners()->repeater()->OnTestPartResult(result);
-}
-
-DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
-}
-
-// Returns the global test part result reporter.
-TestPartResultReporterInterface*
-UnitTestImpl::GetGlobalTestPartResultReporter() {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  return global_test_part_result_repoter_;
-}
-
-// Sets the global test part result reporter.
-void UnitTestImpl::SetGlobalTestPartResultReporter(
-    TestPartResultReporterInterface* reporter) {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  global_test_part_result_repoter_ = reporter;
-}
-
-// Returns the test part result reporter for the current thread.
-TestPartResultReporterInterface*
-UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
-  return per_thread_test_part_result_reporter_.get();
-}
-
-// Sets the test part result reporter for the current thread.
-void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
-    TestPartResultReporterInterface* reporter) {
-  per_thread_test_part_result_reporter_.set(reporter);
-}
-
-// Gets the number of successful test suites.
-int UnitTestImpl::successful_test_suite_count() const {
-  return CountIf(test_suites_, TestSuitePassed);
-}
-
-// Gets the number of failed test suites.
-int UnitTestImpl::failed_test_suite_count() const {
-  return CountIf(test_suites_, TestSuiteFailed);
-}
-
-// Gets the number of all test suites.
-int UnitTestImpl::total_test_suite_count() const {
-  return static_cast<int>(test_suites_.size());
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTestImpl::test_suite_to_run_count() const {
-  return CountIf(test_suites_, ShouldRunTestSuite);
-}
-
-// Gets the number of successful tests.
-int UnitTestImpl::successful_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::successful_test_count);
-}
-
-// Gets the number of skipped tests.
-int UnitTestImpl::skipped_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::skipped_test_count);
-}
-
-// Gets the number of failed tests.
-int UnitTestImpl::failed_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::failed_test_count);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTestImpl::reportable_disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_,
-                              &TestSuite::reportable_disabled_test_count);
-}
-
-// Gets the number of disabled tests.
-int UnitTestImpl::disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::disabled_test_count);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTestImpl::reportable_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::reportable_test_count);
-}
-
-// Gets the number of all tests.
-int UnitTestImpl::total_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::total_test_count);
-}
-
-// Gets the number of tests that should run.
-int UnitTestImpl::test_to_run_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::test_to_run_count);
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
-  return os_stack_trace_getter()->CurrentStackTrace(
-      static_cast<int>(GTEST_FLAG(stack_trace_depth)),
-      skip_count + 1
-      // Skips the user-specified number of frames plus this function
-      // itself.
-      );  // NOLINT
-}
-
-// A helper class for measuring elapsed times.
-class Timer {
- public:
-  Timer() : start_(std::chrono::steady_clock::now()) {}
-
-  // Return time elapsed in milliseconds since the timer was created.
-  TimeInMillis Elapsed() {
-    return std::chrono::duration_cast<std::chrono::milliseconds>(
-               std::chrono::steady_clock::now() - start_)
-        .count();
-  }
-
- private:
-  std::chrono::steady_clock::time_point start_;
-};
-
-// Returns a timestamp as milliseconds since the epoch. Note this time may jump
-// around subject to adjustments by the system, to measure elapsed time use
-// Timer instead.
-TimeInMillis GetTimeInMillis() {
-  return std::chrono::duration_cast<std::chrono::milliseconds>(
-             std::chrono::system_clock::now() -
-             std::chrono::system_clock::from_time_t(0))
-      .count();
-}
-
-// Utilities
-
-// class String.
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Creates a UTF-16 wide string from the given ANSI string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the wide string, or NULL if the
-// input is NULL.
-LPCWSTR String::AnsiToUtf16(const char* ansi) {
-  if (!ansi) return nullptr;
-  const int length = strlen(ansi);
-  const int unicode_length =
-      MultiByteToWideChar(CP_ACP, 0, ansi, length, nullptr, 0);
-  WCHAR* unicode = new WCHAR[unicode_length + 1];
-  MultiByteToWideChar(CP_ACP, 0, ansi, length,
-                      unicode, unicode_length);
-  unicode[unicode_length] = 0;
-  return unicode;
-}
-
-// Creates an ANSI string from the given wide string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the ANSI string, or NULL if the
-// input is NULL.
-const char* String::Utf16ToAnsi(LPCWSTR utf16_str)  {
-  if (!utf16_str) return nullptr;
-  const int ansi_length = WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, nullptr,
-                                              0, nullptr, nullptr);
-  char* ansi = new char[ansi_length + 1];
-  WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, ansi, ansi_length, nullptr,
-                      nullptr);
-  ansi[ansi_length] = 0;
-  return ansi;
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Compares two C strings.  Returns true if and only if they have the same
-// content.
-//
-// Unlike strcmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return strcmp(lhs, rhs) == 0;
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Converts an array of wide chars to a narrow string using the UTF-8
-// encoding, and streams the result to the given Message object.
-static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
-                                     Message* msg) {
-  for (size_t i = 0; i != length; ) {  // NOLINT
-    if (wstr[i] != L'\0') {
-      *msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
-      while (i != length && wstr[i] != L'\0')
-        i++;
-    } else {
-      *msg << '\0';
-      i++;
-    }
-  }
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest) {
-  ::std::vector< ::std::string> parsed;
-  ::std::string::size_type pos = 0;
-  while (::testing::internal::AlwaysTrue()) {
-    const ::std::string::size_type colon = str.find(delimiter, pos);
-    if (colon == ::std::string::npos) {
-      parsed.push_back(str.substr(pos));
-      break;
-    } else {
-      parsed.push_back(str.substr(pos, colon - pos));
-      pos = colon + 1;
-    }
-  }
-  dest->swap(parsed);
-}
-
-}  // namespace internal
-
-// Constructs an empty Message.
-// We allocate the stringstream separately because otherwise each use of
-// ASSERT/EXPECT in a procedure adds over 200 bytes to the procedure's
-// stack frame leading to huge stack frames in some cases; gcc does not reuse
-// the stack space.
-Message::Message() : ss_(new ::std::stringstream) {
-  // By default, we want there to be enough precision when printing
-  // a double to a Message.
-  *ss_ << std::setprecision(std::numeric_limits<double>::digits10 + 2);
-}
-
-// These two overloads allow streaming a wide C string to a Message
-// using the UTF-8 encoding.
-Message& Message::operator <<(const wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-Message& Message::operator <<(wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Converts the given wide string to a narrow string using the UTF-8
-// encoding, and streams the result to this Message object.
-Message& Message::operator <<(const ::std::wstring& wstr) {
-  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
-  return *this;
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Gets the text streamed to this object so far as an std::string.
-// Each '\0' character in the buffer is replaced with "\\0".
-std::string Message::GetString() const {
-  return internal::StringStreamToString(ss_.get());
-}
-
-// AssertionResult constructors.
-// Used in EXPECT_TRUE/FALSE(assertion_result).
-AssertionResult::AssertionResult(const AssertionResult& other)
-    : success_(other.success_),
-      message_(other.message_.get() != nullptr
-                   ? new ::std::string(*other.message_)
-                   : static_cast< ::std::string*>(nullptr)) {}
-
-// Swaps two AssertionResults.
-void AssertionResult::swap(AssertionResult& other) {
-  using std::swap;
-  swap(success_, other.success_);
-  swap(message_, other.message_);
-}
-
-// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-AssertionResult AssertionResult::operator!() const {
-  AssertionResult negation(!success_);
-  if (message_.get() != nullptr) negation << *message_;
-  return negation;
-}
-
-// Makes a successful assertion result.
-AssertionResult AssertionSuccess() {
-  return AssertionResult(true);
-}
-
-// Makes a failed assertion result.
-AssertionResult AssertionFailure() {
-  return AssertionResult(false);
-}
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << message.
-AssertionResult AssertionFailure(const Message& message) {
-  return AssertionFailure() << message;
-}
-
-namespace internal {
-
-namespace edit_distance {
-std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
-                                            const std::vector<size_t>& right) {
-  std::vector<std::vector<double> > costs(
-      left.size() + 1, std::vector<double>(right.size() + 1));
-  std::vector<std::vector<EditType> > best_move(
-      left.size() + 1, std::vector<EditType>(right.size() + 1));
-
-  // Populate for empty right.
-  for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
-    costs[l_i][0] = static_cast<double>(l_i);
-    best_move[l_i][0] = kRemove;
-  }
-  // Populate for empty left.
-  for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
-    costs[0][r_i] = static_cast<double>(r_i);
-    best_move[0][r_i] = kAdd;
-  }
-
-  for (size_t l_i = 0; l_i < left.size(); ++l_i) {
-    for (size_t r_i = 0; r_i < right.size(); ++r_i) {
-      if (left[l_i] == right[r_i]) {
-        // Found a match. Consume it.
-        costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
-        best_move[l_i + 1][r_i + 1] = kMatch;
-        continue;
-      }
-
-      const double add = costs[l_i + 1][r_i];
-      const double remove = costs[l_i][r_i + 1];
-      const double replace = costs[l_i][r_i];
-      if (add < remove && add < replace) {
-        costs[l_i + 1][r_i + 1] = add + 1;
-        best_move[l_i + 1][r_i + 1] = kAdd;
-      } else if (remove < add && remove < replace) {
-        costs[l_i + 1][r_i + 1] = remove + 1;
-        best_move[l_i + 1][r_i + 1] = kRemove;
-      } else {
-        // We make replace a little more expensive than add/remove to lower
-        // their priority.
-        costs[l_i + 1][r_i + 1] = replace + 1.00001;
-        best_move[l_i + 1][r_i + 1] = kReplace;
-      }
-    }
-  }
-
-  // Reconstruct the best path. We do it in reverse order.
-  std::vector<EditType> best_path;
-  for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 || r_i > 0;) {
-    EditType move = best_move[l_i][r_i];
-    best_path.push_back(move);
-    l_i -= move != kAdd;
-    r_i -= move != kRemove;
-  }
-  std::reverse(best_path.begin(), best_path.end());
-  return best_path;
-}
-
-namespace {
-
-// Helper class to convert string into ids with deduplication.
-class InternalStrings {
- public:
-  size_t GetId(const std::string& str) {
-    IdMap::iterator it = ids_.find(str);
-    if (it != ids_.end()) return it->second;
-    size_t id = ids_.size();
-    return ids_[str] = id;
-  }
-
- private:
-  typedef std::map<std::string, size_t> IdMap;
-  IdMap ids_;
-};
-
-}  // namespace
-
-std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right) {
-  std::vector<size_t> left_ids, right_ids;
-  {
-    InternalStrings intern_table;
-    for (size_t i = 0; i < left.size(); ++i) {
-      left_ids.push_back(intern_table.GetId(left[i]));
-    }
-    for (size_t i = 0; i < right.size(); ++i) {
-      right_ids.push_back(intern_table.GetId(right[i]));
-    }
-  }
-  return CalculateOptimalEdits(left_ids, right_ids);
-}
-
-namespace {
-
-// Helper class that holds the state for one hunk and prints it out to the
-// stream.
-// It reorders adds/removes when possible to group all removes before all
-// adds. It also adds the hunk header before printint into the stream.
-class Hunk {
- public:
-  Hunk(size_t left_start, size_t right_start)
-      : left_start_(left_start),
-        right_start_(right_start),
-        adds_(),
-        removes_(),
-        common_() {}
-
-  void PushLine(char edit, const char* line) {
-    switch (edit) {
-      case ' ':
-        ++common_;
-        FlushEdits();
-        hunk_.push_back(std::make_pair(' ', line));
-        break;
-      case '-':
-        ++removes_;
-        hunk_removes_.push_back(std::make_pair('-', line));
-        break;
-      case '+':
-        ++adds_;
-        hunk_adds_.push_back(std::make_pair('+', line));
-        break;
-    }
-  }
-
-  void PrintTo(std::ostream* os) {
-    PrintHeader(os);
-    FlushEdits();
-    for (std::list<std::pair<char, const char*> >::const_iterator it =
-             hunk_.begin();
-         it != hunk_.end(); ++it) {
-      *os << it->first << it->second << "\n";
-    }
-  }
-
-  bool has_edits() const { return adds_ || removes_; }
-
- private:
-  void FlushEdits() {
-    hunk_.splice(hunk_.end(), hunk_removes_);
-    hunk_.splice(hunk_.end(), hunk_adds_);
-  }
-
-  // Print a unified diff header for one hunk.
-  // The format is
-  //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
-  // where the left/right parts are omitted if unnecessary.
-  void PrintHeader(std::ostream* ss) const {
-    *ss << "@@ ";
-    if (removes_) {
-      *ss << "-" << left_start_ << "," << (removes_ + common_);
-    }
-    if (removes_ && adds_) {
-      *ss << " ";
-    }
-    if (adds_) {
-      *ss << "+" << right_start_ << "," << (adds_ + common_);
-    }
-    *ss << " @@\n";
-  }
-
-  size_t left_start_, right_start_;
-  size_t adds_, removes_, common_;
-  std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
-};
-
-}  // namespace
-
-// Create a list of diff hunks in Unified diff format.
-// Each hunk has a header generated by PrintHeader above plus a body with
-// lines prefixed with ' ' for no change, '-' for deletion and '+' for
-// addition.
-// 'context' represents the desired unchanged prefix/suffix around the diff.
-// If two hunks are close enough that their contexts overlap, then they are
-// joined into one hunk.
-std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                              const std::vector<std::string>& right,
-                              size_t context) {
-  const std::vector<EditType> edits = CalculateOptimalEdits(left, right);
-
-  size_t l_i = 0, r_i = 0, edit_i = 0;
-  std::stringstream ss;
-  while (edit_i < edits.size()) {
-    // Find first edit.
-    while (edit_i < edits.size() && edits[edit_i] == kMatch) {
-      ++l_i;
-      ++r_i;
-      ++edit_i;
-    }
-
-    // Find the first line to include in the hunk.
-    const size_t prefix_context = std::min(l_i, context);
-    Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
-    for (size_t i = prefix_context; i > 0; --i) {
-      hunk.PushLine(' ', left[l_i - i].c_str());
-    }
-
-    // Iterate the edits until we found enough suffix for the hunk or the input
-    // is over.
-    size_t n_suffix = 0;
-    for (; edit_i < edits.size(); ++edit_i) {
-      if (n_suffix >= context) {
-        // Continue only if the next hunk is very close.
-        auto it = edits.begin() + static_cast<int>(edit_i);
-        while (it != edits.end() && *it == kMatch) ++it;
-        if (it == edits.end() ||
-            static_cast<size_t>(it - edits.begin()) - edit_i >= context) {
-          // There is no next edit or it is too far away.
-          break;
-        }
-      }
-
-      EditType edit = edits[edit_i];
-      // Reset count when a non match is found.
-      n_suffix = edit == kMatch ? n_suffix + 1 : 0;
-
-      if (edit == kMatch || edit == kRemove || edit == kReplace) {
-        hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
-      }
-      if (edit == kAdd || edit == kReplace) {
-        hunk.PushLine('+', right[r_i].c_str());
-      }
-
-      // Advance indices, depending on edit type.
-      l_i += edit != kAdd;
-      r_i += edit != kRemove;
-    }
-
-    if (!hunk.has_edits()) {
-      // We are done. We don't want this hunk.
-      break;
-    }
-
-    hunk.PrintTo(&ss);
-  }
-  return ss.str();
-}
-
-}  // namespace edit_distance
-
-namespace {
-
-// The string representation of the values received in EqFailure() are already
-// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
-// characters the same.
-std::vector<std::string> SplitEscapedString(const std::string& str) {
-  std::vector<std::string> lines;
-  size_t start = 0, end = str.size();
-  if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
-    ++start;
-    --end;
-  }
-  bool escaped = false;
-  for (size_t i = start; i + 1 < end; ++i) {
-    if (escaped) {
-      escaped = false;
-      if (str[i] == 'n') {
-        lines.push_back(str.substr(start, i - start - 1));
-        start = i + 1;
-      }
-    } else {
-      escaped = str[i] == '\\';
-    }
-  }
-  lines.push_back(str.substr(start, end - start));
-  return lines;
-}
-
-}  // namespace
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   lhs_expression: "foo"
-//   rhs_expression: "bar"
-//   lhs_value:      "5"
-//   rhs_value:      "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string "Ignoring case" will
-// be inserted into the message.
-AssertionResult EqFailure(const char* lhs_expression,
-                          const char* rhs_expression,
-                          const std::string& lhs_value,
-                          const std::string& rhs_value,
-                          bool ignoring_case) {
-  Message msg;
-  msg << "Expected equality of these values:";
-  msg << "\n  " << lhs_expression;
-  if (lhs_value != lhs_expression) {
-    msg << "\n    Which is: " << lhs_value;
-  }
-  msg << "\n  " << rhs_expression;
-  if (rhs_value != rhs_expression) {
-    msg << "\n    Which is: " << rhs_value;
-  }
-
-  if (ignoring_case) {
-    msg << "\nIgnoring case";
-  }
-
-  if (!lhs_value.empty() && !rhs_value.empty()) {
-    const std::vector<std::string> lhs_lines =
-        SplitEscapedString(lhs_value);
-    const std::vector<std::string> rhs_lines =
-        SplitEscapedString(rhs_value);
-    if (lhs_lines.size() > 1 || rhs_lines.size() > 1) {
-      msg << "\nWith diff:\n"
-          << edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
-    }
-  }
-
-  return AssertionFailure() << msg;
-}
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value) {
-  const char* actual_message = assertion_result.message();
-  Message msg;
-  msg << "Value of: " << expression_text
-      << "\n  Actual: " << actual_predicate_value;
-  if (actual_message[0] != '\0')
-    msg << " (" << actual_message << ")";
-  msg << "\nExpected: " << expected_predicate_value;
-  return msg.GetString();
-}
-
-// Helper function for implementing ASSERT_NEAR.
-AssertionResult DoubleNearPredFormat(const char* expr1,
-                                     const char* expr2,
-                                     const char* abs_error_expr,
-                                     double val1,
-                                     double val2,
-                                     double abs_error) {
-  const double diff = fabs(val1 - val2);
-  if (diff <= abs_error) return AssertionSuccess();
-
-  // Find the value which is closest to zero.
-  const double min_abs = std::min(fabs(val1), fabs(val2));
-  // Find the distance to the next double from that value.
-  const double epsilon =
-      nextafter(min_abs, std::numeric_limits<double>::infinity()) - min_abs;
-  // Detect the case where abs_error is so small that EXPECT_NEAR is
-  // effectively the same as EXPECT_EQUAL, and give an informative error
-  // message so that the situation can be more easily understood without
-  // requiring exotic floating-point knowledge.
-  // Don't do an epsilon check if abs_error is zero because that implies
-  // that an equality check was actually intended.
-  if (!(std::isnan)(val1) && !(std::isnan)(val2) && abs_error > 0 &&
-      abs_error < epsilon) {
-    return AssertionFailure()
-           << "The difference between " << expr1 << " and " << expr2 << " is "
-           << diff << ", where\n"
-           << expr1 << " evaluates to " << val1 << ",\n"
-           << expr2 << " evaluates to " << val2 << ".\nThe abs_error parameter "
-           << abs_error_expr << " evaluates to " << abs_error
-           << " which is smaller than the minimum distance between doubles for "
-              "numbers of this magnitude which is "
-           << epsilon
-           << ", thus making this EXPECT_NEAR check equivalent to "
-              "EXPECT_EQUAL. Consider using EXPECT_DOUBLE_EQ instead.";
-  }
-  return AssertionFailure()
-      << "The difference between " << expr1 << " and " << expr2
-      << " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
-      << expr1 << " evaluates to " << val1 << ",\n"
-      << expr2 << " evaluates to " << val2 << ", and\n"
-      << abs_error_expr << " evaluates to " << abs_error << ".";
-}
-
-
-// Helper template for implementing FloatLE() and DoubleLE().
-template <typename RawType>
-AssertionResult FloatingPointLE(const char* expr1,
-                                const char* expr2,
-                                RawType val1,
-                                RawType val2) {
-  // Returns success if val1 is less than val2,
-  if (val1 < val2) {
-    return AssertionSuccess();
-  }
-
-  // or if val1 is almost equal to val2.
-  const FloatingPoint<RawType> lhs(val1), rhs(val2);
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  // Note that the above two checks will both fail if either val1 or
-  // val2 is NaN, as the IEEE floating-point standard requires that
-  // any predicate involving a NaN must return false.
-
-  ::std::stringstream val1_ss;
-  val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val1;
-
-  ::std::stringstream val2_ss;
-  val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val2;
-
-  return AssertionFailure()
-      << "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
-      << "  Actual: " << StringStreamToString(&val1_ss) << " vs "
-      << StringStreamToString(&val2_ss);
-}
-
-}  // namespace internal
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult FloatLE(const char* expr1, const char* expr2,
-                        float val1, float val2) {
-  return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
-}
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                         double val1, double val2) {
-  return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
-}
-
-namespace internal {
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const char* lhs,
-                               const char* rhs) {
-  if (String::CStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const char* lhs,
-                                   const char* rhs) {
-  if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   true);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const char* s1,
-                               const char* s2) {
-  if (!String::CStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                              << s2_expression << "), actual: \""
-                              << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                   const char* s2_expression,
-                                   const char* s1,
-                                   const char* s2) {
-  if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure()
-        << "Expected: (" << s1_expression << ") != ("
-        << s2_expression << ") (ignoring case), actual: \""
-        << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-}  // namespace internal
-
-namespace {
-
-// Helper functions for implementing IsSubString() and IsNotSubstring().
-
-// This group of overloaded functions return true if and only if needle
-// is a substring of haystack.  NULL is considered a substring of
-// itself only.
-
-bool IsSubstringPred(const char* needle, const char* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return strstr(haystack, needle) != nullptr;
-}
-
-bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return wcsstr(haystack, needle) != nullptr;
-}
-
-// StringType here can be either ::std::string or ::std::wstring.
-template <typename StringType>
-bool IsSubstringPred(const StringType& needle,
-                     const StringType& haystack) {
-  return haystack.find(needle) != StringType::npos;
-}
-
-// This function implements either IsSubstring() or IsNotSubstring(),
-// depending on the value of the expected_to_be_substring parameter.
-// StringType here can be const char*, const wchar_t*, ::std::string,
-// or ::std::wstring.
-template <typename StringType>
-AssertionResult IsSubstringImpl(
-    bool expected_to_be_substring,
-    const char* needle_expr, const char* haystack_expr,
-    const StringType& needle, const StringType& haystack) {
-  if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(needle[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << "Value of: " << needle_expr << "\n"
-      << "  Actual: " << begin_string_quote << needle << "\"\n"
-      << "Expected: " << (expected_to_be_substring ? "" : "not ")
-      << "a substring of " << haystack_expr << "\n"
-      << "Which is: " << begin_string_quote << haystack << "\"";
-}
-
-}  // namespace
-
-// IsSubstring() and IsNotSubstring() check whether needle is a
-// substring of haystack (NULL is considered a substring of itself
-// only), and return an appropriate error message when they fail.
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-#if GTEST_HAS_STD_WSTRING
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-
-namespace {
-
-// Helper function for IsHRESULT{SuccessFailure} predicates
-AssertionResult HRESULTFailureHelper(const char* expr,
-                                     const char* expected,
-                                     long hr) {  // NOLINT
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_TV_TITLE
-
-  // Windows CE doesn't support FormatMessage.
-  const char error_text[] = "";
-
-# else
-
-  // Looks up the human-readable system message for the HRESULT code
-  // and since we're not passing any params to FormatMessage, we don't
-  // want inserts expanded.
-  const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM |
-                       FORMAT_MESSAGE_IGNORE_INSERTS;
-  const DWORD kBufSize = 4096;
-  // Gets the system's human readable message string for this HRESULT.
-  char error_text[kBufSize] = { '\0' };
-  DWORD message_length = ::FormatMessageA(kFlags,
-                                          0,   // no source, we're asking system
-                                          static_cast<DWORD>(hr),  // the error
-                                          0,   // no line width restrictions
-                                          error_text,  // output buffer
-                                          kBufSize,    // buf size
-                                          nullptr);  // no arguments for inserts
-  // Trims tailing white space (FormatMessage leaves a trailing CR-LF)
-  for (; message_length && IsSpace(error_text[message_length - 1]);
-          --message_length) {
-    error_text[message_length - 1] = '\0';
-  }
-
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-  const std::string error_hex("0x" + String::FormatHexInt(hr));
-  return ::testing::AssertionFailure()
-      << "Expected: " << expr << " " << expected << ".\n"
-      << "  Actual: " << error_hex << " " << error_text << "\n";
-}
-
-}  // namespace
-
-AssertionResult IsHRESULTSuccess(const char* expr, long hr) {  // NOLINT
-  if (SUCCEEDED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "succeeds", hr);
-}
-
-AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
-  if (FAILED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "fails", hr);
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-// Utility functions for encoding Unicode text (wide strings) in
-// UTF-8.
-
-// A Unicode code-point can have up to 21 bits, and is encoded in UTF-8
-// like this:
-//
-// Code-point length   Encoding
-//   0 -  7 bits       0xxxxxxx
-//   8 - 11 bits       110xxxxx 10xxxxxx
-//  12 - 16 bits       1110xxxx 10xxxxxx 10xxxxxx
-//  17 - 21 bits       11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-
-// The maximum code-point a one-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint1 = (static_cast<uint32_t>(1) <<  7) - 1;
-
-// The maximum code-point a two-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint2 = (static_cast<uint32_t>(1) << (5 + 6)) - 1;
-
-// The maximum code-point a three-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint3 = (static_cast<uint32_t>(1) << (4 + 2*6)) - 1;
-
-// The maximum code-point a four-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint4 = (static_cast<uint32_t>(1) << (3 + 3*6)) - 1;
-
-// Chops off the n lowest bits from a bit pattern.  Returns the n
-// lowest bits.  As a side effect, the original bit pattern will be
-// shifted to the right by n bits.
-inline uint32_t ChopLowBits(uint32_t* bits, int n) {
-  const uint32_t low_bits = *bits & ((static_cast<uint32_t>(1) << n) - 1);
-  *bits >>= n;
-  return low_bits;
-}
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type uint32_t because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-std::string CodePointToUtf8(uint32_t code_point) {
-  if (code_point > kMaxCodePoint4) {
-    return "(Invalid Unicode 0x" + String::FormatHexUInt32(code_point) + ")";
-  }
-
-  char str[5];  // Big enough for the largest valid code point.
-  if (code_point <= kMaxCodePoint1) {
-    str[1] = '\0';
-    str[0] = static_cast<char>(code_point);                          // 0xxxxxxx
-  } else if (code_point <= kMaxCodePoint2) {
-    str[2] = '\0';
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xC0 | code_point);                   // 110xxxxx
-  } else if (code_point <= kMaxCodePoint3) {
-    str[3] = '\0';
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xE0 | code_point);                   // 1110xxxx
-  } else {  // code_point <= kMaxCodePoint4
-    str[4] = '\0';
-    str[3] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xF0 | code_point);                   // 11110xxx
-  }
-  return str;
-}
-
-// The following two functions only make sense if the system
-// uses UTF-16 for wide string encoding. All supported systems
-// with 16 bit wchar_t (Windows, Cygwin) do use UTF-16.
-
-// Determines if the arguments constitute UTF-16 surrogate pair
-// and thus should be combined into a single Unicode code point
-// using CreateCodePointFromUtf16SurrogatePair.
-inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
-  return sizeof(wchar_t) == 2 &&
-      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
-}
-
-// Creates a Unicode code point from UTF16 surrogate pair.
-inline uint32_t CreateCodePointFromUtf16SurrogatePair(wchar_t first,
-                                                      wchar_t second) {
-  const auto first_u = static_cast<uint32_t>(first);
-  const auto second_u = static_cast<uint32_t>(second);
-  const uint32_t mask = (1 << 10) - 1;
-  return (sizeof(wchar_t) == 2)
-             ? (((first_u & mask) << 10) | (second_u & mask)) + 0x10000
-             :
-             // This function should not be called when the condition is
-             // false, but we provide a sensible default in case it is.
-             first_u;
-}
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-std::string WideStringToUtf8(const wchar_t* str, int num_chars) {
-  if (num_chars == -1)
-    num_chars = static_cast<int>(wcslen(str));
-
-  ::std::stringstream stream;
-  for (int i = 0; i < num_chars; ++i) {
-    uint32_t unicode_code_point;
-
-    if (str[i] == L'\0') {
-      break;
-    } else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
-      unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
-                                                                 str[i + 1]);
-      i++;
-    } else {
-      unicode_code_point = static_cast<uint32_t>(str[i]);
-    }
-
-    stream << CodePointToUtf8(unicode_code_point);
-  }
-  return StringStreamToString(&stream);
-}
-
-// Converts a wide C string to an std::string using the UTF-8 encoding.
-// NULL will be converted to "(null)".
-std::string String::ShowWideCString(const wchar_t * wide_c_str) {
-  if (wide_c_str == nullptr) return "(null)";
-
-  return internal::WideStringToUtf8(wide_c_str, -1);
-}
-
-// Compares two wide C strings.  Returns true if and only if they have the
-// same content.
-//
-// Unlike wcscmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return wcscmp(lhs, rhs) == 0;
-}
-
-// Helper function for *_STREQ on wide strings.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const wchar_t* lhs,
-                               const wchar_t* rhs) {
-  if (String::WideCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// Helper function for *_STRNE on wide strings.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const wchar_t* s1,
-                               const wchar_t* s2) {
-  if (!String::WideCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  }
-
-  return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                            << s2_expression << "), actual: "
-                            << PrintToString(s1)
-                            << " vs " << PrintToString(s2);
-}
-
-// Compares two C strings, ignoring case.  Returns true if and only if they have
-// the same content.
-//
-// Unlike strcasecmp(), this function can handle NULL argument(s).  A
-// NULL C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-  if (rhs == nullptr) return false;
-  return posix::StrCaseCmp(lhs, rhs) == 0;
-}
-
-// Compares two wide C strings, ignoring case.  Returns true if and only if they
-// have the same content.
-//
-// Unlike wcscasecmp(), this function can handle NULL argument(s).
-// A NULL C string is considered different to any non-NULL wide C string,
-// including the empty string.
-// NB: The implementations on different platforms slightly differ.
-// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-// environment variable. On GNU platform this method uses wcscasecmp
-// which compares according to LC_CTYPE category of the current locale.
-// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-// current locale.
-bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                              const wchar_t* rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-#if GTEST_OS_WINDOWS
-  return _wcsicmp(lhs, rhs) == 0;
-#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
-  return wcscasecmp(lhs, rhs) == 0;
-#else
-  // Android, Mac OS X and Cygwin don't define wcscasecmp.
-  // Other unknown OSes may not define it either.
-  wint_t left, right;
-  do {
-    left = towlower(static_cast<wint_t>(*lhs++));
-    right = towlower(static_cast<wint_t>(*rhs++));
-  } while (left && left == right);
-  return left == right;
-#endif  // OS selector
-}
-
-// Returns true if and only if str ends with the given suffix, ignoring case.
-// Any string is considered to end with an empty suffix.
-bool String::EndsWithCaseInsensitive(
-    const std::string& str, const std::string& suffix) {
-  const size_t str_len = str.length();
-  const size_t suffix_len = suffix.length();
-  return (str_len >= suffix_len) &&
-         CaseInsensitiveCStringEquals(str.c_str() + str_len - suffix_len,
-                                      suffix.c_str());
-}
-
-// Formats an int value as "%02d".
-std::string String::FormatIntWidth2(int value) {
-  return FormatIntWidthN(value, 2);
-}
-
-// Formats an int value to given width with leading zeros.
-std::string String::FormatIntWidthN(int value, int width) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(width) << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexUInt32(uint32_t value) {
-  std::stringstream ss;
-  ss << std::hex << std::uppercase << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexInt(int value) {
-  return FormatHexUInt32(static_cast<uint32_t>(value));
-}
-
-// Formats a byte as "%02X".
-std::string String::FormatByte(unsigned char value) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(2) << std::hex << std::uppercase
-     << static_cast<unsigned int>(value);
-  return ss.str();
-}
-
-// Converts the buffer in a stringstream to an std::string, converting NUL
-// bytes to "\\0" along the way.
-std::string StringStreamToString(::std::stringstream* ss) {
-  const ::std::string& str = ss->str();
-  const char* const start = str.c_str();
-  const char* const end = start + str.length();
-
-  std::string result;
-  result.reserve(static_cast<size_t>(2 * (end - start)));
-  for (const char* ch = start; ch != end; ++ch) {
-    if (*ch == '\0') {
-      result += "\\0";  // Replaces NUL with "\\0";
-    } else {
-      result += *ch;
-    }
-  }
-
-  return result;
-}
-
-// Appends the user-supplied message to the Google-Test-generated message.
-std::string AppendUserMessage(const std::string& gtest_msg,
-                              const Message& user_msg) {
-  // Appends the user message if it's non-empty.
-  const std::string user_msg_string = user_msg.GetString();
-  if (user_msg_string.empty()) {
-    return gtest_msg;
-  }
-  if (gtest_msg.empty()) {
-    return user_msg_string;
-  }
-  return gtest_msg + "\n" + user_msg_string;
-}
-
-}  // namespace internal
-
-// class TestResult
-
-// Creates an empty TestResult.
-TestResult::TestResult()
-    : death_test_count_(0), start_timestamp_(0), elapsed_time_(0) {}
-
-// D'tor.
-TestResult::~TestResult() {
-}
-
-// Returns the i-th test part result among all the results. i can
-// range from 0 to total_part_count() - 1. If i is not in that range,
-// aborts the program.
-const TestPartResult& TestResult::GetTestPartResult(int i) const {
-  if (i < 0 || i >= total_part_count())
-    internal::posix::Abort();
-  return test_part_results_.at(static_cast<size_t>(i));
-}
-
-// Returns the i-th test property. i can range from 0 to
-// test_property_count() - 1. If i is not in that range, aborts the
-// program.
-const TestProperty& TestResult::GetTestProperty(int i) const {
-  if (i < 0 || i >= test_property_count())
-    internal::posix::Abort();
-  return test_properties_.at(static_cast<size_t>(i));
-}
-
-// Clears the test part results.
-void TestResult::ClearTestPartResults() {
-  test_part_results_.clear();
-}
-
-// Adds a test part result to the list.
-void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
-  test_part_results_.push_back(test_part_result);
-}
-
-// Adds a test property to the list. If a property with the same key as the
-// supplied property is already represented, the value of this test_property
-// replaces the old value for that key.
-void TestResult::RecordProperty(const std::string& xml_element,
-                                const TestProperty& test_property) {
-  if (!ValidateTestProperty(xml_element, test_property)) {
-    return;
-  }
-  internal::MutexLock lock(&test_properties_mutex_);
-  const std::vector<TestProperty>::iterator property_with_matching_key =
-      std::find_if(test_properties_.begin(), test_properties_.end(),
-                   internal::TestPropertyKeyIs(test_property.key()));
-  if (property_with_matching_key == test_properties_.end()) {
-    test_properties_.push_back(test_property);
-    return;
-  }
-  property_with_matching_key->SetValue(test_property.value());
-}
-
-// The list of reserved attributes used in the <testsuites> element of XML
-// output.
-static const char* const kReservedTestSuitesAttributes[] = {
-  "disabled",
-  "errors",
-  "failures",
-  "name",
-  "random_seed",
-  "tests",
-  "time",
-  "timestamp"
-};
-
-// The list of reserved attributes used in the <testsuite> element of XML
-// output.
-static const char* const kReservedTestSuiteAttributes[] = {
-    "disabled", "errors", "failures",  "name",
-    "tests",    "time",   "timestamp", "skipped"};
-
-// The list of reserved attributes used in the <testcase> element of XML output.
-static const char* const kReservedTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",  "type_param",
-    "value_param", "file", "line"};
-
-// Use a slightly different set for allowed output to ensure existing tests can
-// still RecordProperty("result") or "RecordProperty(timestamp")
-static const char* const kReservedOutputTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",   "type_param",
-    "value_param", "file", "line",   "result", "timestamp"};
-
-template <size_t kSize>
-std::vector<std::string> ArrayAsVector(const char* const (&array)[kSize]) {
-  return std::vector<std::string>(array, array + kSize);
-}
-
-static std::vector<std::string> GetReservedAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-// TODO(jdesprez): Merge the two getReserved attributes once skip is improved
-static std::vector<std::string> GetReservedOutputAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedOutputTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-static std::string FormatWordList(const std::vector<std::string>& words) {
-  Message word_list;
-  for (size_t i = 0; i < words.size(); ++i) {
-    if (i > 0 && words.size() > 2) {
-      word_list << ", ";
-    }
-    if (i == words.size() - 1) {
-      word_list << "and ";
-    }
-    word_list << "'" << words[i] << "'";
-  }
-  return word_list.GetString();
-}
-
-static bool ValidateTestPropertyName(
-    const std::string& property_name,
-    const std::vector<std::string>& reserved_names) {
-  if (std::find(reserved_names.begin(), reserved_names.end(), property_name) !=
-          reserved_names.end()) {
-    ADD_FAILURE() << "Reserved key used in RecordProperty(): " << property_name
-                  << " (" << FormatWordList(reserved_names)
-                  << " are reserved by " << GTEST_NAME_ << ")";
-    return false;
-  }
-  return true;
-}
-
-// Adds a failure if the key is a reserved attribute of the element named
-// xml_element.  Returns true if the property is valid.
-bool TestResult::ValidateTestProperty(const std::string& xml_element,
-                                      const TestProperty& test_property) {
-  return ValidateTestPropertyName(test_property.key(),
-                                  GetReservedAttributesForElement(xml_element));
-}
-
-// Clears the object.
-void TestResult::Clear() {
-  test_part_results_.clear();
-  test_properties_.clear();
-  death_test_count_ = 0;
-  elapsed_time_ = 0;
-}
-
-// Returns true off the test part was skipped.
-static bool TestPartSkipped(const TestPartResult& result) {
-  return result.skipped();
-}
-
-// Returns true if and only if the test was skipped.
-bool TestResult::Skipped() const {
-  return !Failed() && CountIf(test_part_results_, TestPartSkipped) > 0;
-}
-
-// Returns true if and only if the test failed.
-bool TestResult::Failed() const {
-  for (int i = 0; i < total_part_count(); ++i) {
-    if (GetTestPartResult(i).failed())
-      return true;
-  }
-  return false;
-}
-
-// Returns true if and only if the test part fatally failed.
-static bool TestPartFatallyFailed(const TestPartResult& result) {
-  return result.fatally_failed();
-}
-
-// Returns true if and only if the test fatally failed.
-bool TestResult::HasFatalFailure() const {
-  return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
-}
-
-// Returns true if and only if the test part non-fatally failed.
-static bool TestPartNonfatallyFailed(const TestPartResult& result) {
-  return result.nonfatally_failed();
-}
-
-// Returns true if and only if the test has a non-fatal failure.
-bool TestResult::HasNonfatalFailure() const {
-  return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
-}
-
-// Gets the number of all test parts.  This is the sum of the number
-// of successful test parts and the number of failed test parts.
-int TestResult::total_part_count() const {
-  return static_cast<int>(test_part_results_.size());
-}
-
-// Returns the number of the test properties.
-int TestResult::test_property_count() const {
-  return static_cast<int>(test_properties_.size());
-}
-
-// class Test
-
-// Creates a Test object.
-
-// The c'tor saves the states of all flags.
-Test::Test()
-    : gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
-}
-
-// The d'tor restores the states of all flags.  The actual work is
-// done by the d'tor of the gtest_flag_saver_ field, and thus not
-// visible here.
-Test::~Test() {
-}
-
-// Sets up the test fixture.
-//
-// A sub-class may override this.
-void Test::SetUp() {
-}
-
-// Tears down the test fixture.
-//
-// A sub-class may override this.
-void Test::TearDown() {
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, const std::string& value) {
-  UnitTest::GetInstance()->RecordProperty(key, value);
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, int value) {
-  Message value_message;
-  value_message << value;
-  RecordProperty(key, value_message.GetString().c_str());
-}
-
-namespace internal {
-
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message) {
-  // This function is a friend of UnitTest and as such has access to
-  // AddTestPartResult.
-  UnitTest::GetInstance()->AddTestPartResult(
-      result_type,
-      nullptr,  // No info about the source file where the exception occurred.
-      -1,       // We have no info on which line caused the exception.
-      message,
-      "");  // No stack trace, either.
-}
-
-}  // namespace internal
-
-// Google Test requires all tests in the same test suite to use the same test
-// fixture class.  This function checks if the current test has the
-// same fixture class as the first test in the current test suite.  If
-// yes, it returns true; otherwise it generates a Google Test failure and
-// returns false.
-bool Test::HasSameFixtureClass() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  const TestSuite* const test_suite = impl->current_test_suite();
-
-  // Info about the first test in the current test suite.
-  const TestInfo* const first_test_info = test_suite->test_info_list()[0];
-  const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
-  const char* const first_test_name = first_test_info->name();
-
-  // Info about the current test.
-  const TestInfo* const this_test_info = impl->current_test_info();
-  const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
-  const char* const this_test_name = this_test_info->name();
-
-  if (this_fixture_id != first_fixture_id) {
-    // Is the first test defined using TEST?
-    const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
-    // Is this test defined using TEST?
-    const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();
-
-    if (first_is_TEST || this_is_TEST) {
-      // Both TEST and TEST_F appear in same test suite, which is incorrect.
-      // Tell the user how to fix this.
-
-      // Gets the name of the TEST and the name of the TEST_F.  Note
-      // that first_is_TEST and this_is_TEST cannot both be true, as
-      // the fixture IDs are different for the two tests.
-      const char* const TEST_name =
-          first_is_TEST ? first_test_name : this_test_name;
-      const char* const TEST_F_name =
-          first_is_TEST ? this_test_name : first_test_name;
-
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class, so mixing TEST_F and TEST in the same test suite is\n"
-          << "illegal.  In test suite " << this_test_info->test_suite_name()
-          << ",\n"
-          << "test " << TEST_F_name << " is defined using TEST_F but\n"
-          << "test " << TEST_name << " is defined using TEST.  You probably\n"
-          << "want to change the TEST to TEST_F or move it to another test\n"
-          << "case.";
-    } else {
-      // Two fixture classes with the same name appear in two different
-      // namespaces, which is not allowed. Tell the user how to fix this.
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class.  However, in test suite "
-          << this_test_info->test_suite_name() << ",\n"
-          << "you defined test " << first_test_name << " and test "
-          << this_test_name << "\n"
-          << "using two different test fixture classes.  This can happen if\n"
-          << "the two classes are from different namespaces or translation\n"
-          << "units and have the same name.  You should probably rename one\n"
-          << "of the classes to put the tests into different test suites.";
-    }
-    return false;
-  }
-
-  return true;
-}
-
-#if GTEST_HAS_SEH
-
-// Adds an "exception thrown" fatal failure to the current test.  This
-// function returns its result via an output parameter pointer because VC++
-// prohibits creation of objects with destructors on stack in functions
-// using __try (see error C2712).
-static std::string* FormatSehExceptionMessage(DWORD exception_code,
-                                              const char* location) {
-  Message message;
-  message << "SEH exception with code 0x" << std::setbase(16) <<
-    exception_code << std::setbase(10) << " thrown in " << location << ".";
-
-  return new std::string(message.GetString());
-}
-
-#endif  // GTEST_HAS_SEH
-
-namespace internal {
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Adds an "exception thrown" fatal failure to the current test.
-static std::string FormatCxxExceptionMessage(const char* description,
-                                             const char* location) {
-  Message message;
-  if (description != nullptr) {
-    message << "C++ exception with description \"" << description << "\"";
-  } else {
-    message << "Unknown C++ exception";
-  }
-  message << " thrown in " << location << ".";
-
-  return message.GetString();
-}
-
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result);
-
-GoogleTestFailureException::GoogleTestFailureException(
-    const TestPartResult& failure)
-    : ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// We put these helper functions in the internal namespace as IBM's xlC
-// compiler rejects the code if they were declared static.
-
-// Runs the given method and handles SEH exceptions it throws, when
-// SEH is supported; returns the 0-value for type Result in case of an
-// SEH exception.  (Microsoft compilers cannot handle SEH and C++
-// exceptions in the same function.  Therefore, we provide a separate
-// wrapper function for handling SEH exceptions.)
-template <class T, typename Result>
-Result HandleSehExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-#if GTEST_HAS_SEH
-  __try {
-    return (object->*method)();
-  } __except (internal::UnitTestOptions::GTestShouldProcessSEH(  // NOLINT
-      GetExceptionCode())) {
-    // We create the exception message on the heap because VC++ prohibits
-    // creation of objects with destructors on stack in functions using __try
-    // (see error C2712).
-    std::string* exception_message = FormatSehExceptionMessage(
-        GetExceptionCode(), location);
-    internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
-                                             *exception_message);
-    delete exception_message;
-    return static_cast<Result>(0);
-  }
-#else
-  (void)location;
-  return (object->*method)();
-#endif  // GTEST_HAS_SEH
-}
-
-// Runs the given method and catches and reports C++ and/or SEH-style
-// exceptions, if they are supported; returns the 0-value for type
-// Result in case of an SEH exception.
-template <class T, typename Result>
-Result HandleExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-  // NOTE: The user code can affect the way in which Google Test handles
-  // exceptions by setting GTEST_FLAG(catch_exceptions), but only before
-  // RUN_ALL_TESTS() starts. It is technically possible to check the flag
-  // after the exception is caught and either report or re-throw the
-  // exception based on the flag's value:
-  //
-  // try {
-  //   // Perform the test method.
-  // } catch (...) {
-  //   if (GTEST_FLAG(catch_exceptions))
-  //     // Report the exception as failure.
-  //   else
-  //     throw;  // Re-throws the original exception.
-  // }
-  //
-  // However, the purpose of this flag is to allow the program to drop into
-  // the debugger when the exception is thrown. On most platforms, once the
-  // control enters the catch block, the exception origin information is
-  // lost and the debugger will stop the program at the point of the
-  // re-throw in this function -- instead of at the point of the original
-  // throw statement in the code under test.  For this reason, we perform
-  // the check early, sacrificing the ability to affect Google Test's
-  // exception handling in the method where the exception is thrown.
-  if (internal::GetUnitTestImpl()->catch_exceptions()) {
-#if GTEST_HAS_EXCEPTIONS
-    try {
-      return HandleSehExceptionsInMethodIfSupported(object, method, location);
-    } catch (const AssertionException&) {  // NOLINT
-      // This failure was reported already.
-    } catch (const internal::GoogleTestFailureException&) {  // NOLINT
-      // This exception type can only be thrown by a failed Google
-      // Test assertion with the intention of letting another testing
-      // framework catch it.  Therefore we just re-throw it.
-      throw;
-    } catch (const std::exception& e) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(e.what(), location));
-    } catch (...) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(nullptr, location));
-    }
-    return static_cast<Result>(0);
-#else
-    return HandleSehExceptionsInMethodIfSupported(object, method, location);
-#endif  // GTEST_HAS_EXCEPTIONS
-  } else {
-    return (object->*method)();
-  }
-}
-
-}  // namespace internal
-
-// Runs the test and updates the test result.
-void Test::Run() {
-  if (!HasSameFixtureClass()) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
-  // We will run the test only if SetUp() was successful and didn't call
-  // GTEST_SKIP().
-  if (!HasFatalFailure() && !IsSkipped()) {
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        this, &Test::TestBody, "the test body");
-  }
-
-  // However, we want to clean up as much as possible.  Hence we will
-  // always call TearDown(), even if SetUp() or the test body has
-  // failed.
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &Test::TearDown, "TearDown()");
-}
-
-// Returns true if and only if the current test has a fatal failure.
-bool Test::HasFatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
-}
-
-// Returns true if and only if the current test has a non-fatal failure.
-bool Test::HasNonfatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->
-      HasNonfatalFailure();
-}
-
-// Returns true if and only if the current test was skipped.
-bool Test::IsSkipped() {
-  return internal::GetUnitTestImpl()->current_test_result()->Skipped();
-}
-
-// class TestInfo
-
-// Constructs a TestInfo object. It assumes ownership of the test factory
-// object.
-TestInfo::TestInfo(const std::string& a_test_suite_name,
-                   const std::string& a_name, const char* a_type_param,
-                   const char* a_value_param,
-                   internal::CodeLocation a_code_location,
-                   internal::TypeId fixture_class_id,
-                   internal::TestFactoryBase* factory)
-    : test_suite_name_(a_test_suite_name),
-      name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      value_param_(a_value_param ? new std::string(a_value_param) : nullptr),
-      location_(a_code_location),
-      fixture_class_id_(fixture_class_id),
-      should_run_(false),
-      is_disabled_(false),
-      matches_filter_(false),
-      is_in_another_shard_(false),
-      factory_(factory),
-      result_() {}
-
-// Destructs a TestInfo object.
-TestInfo::~TestInfo() { delete factory_; }
-
-namespace internal {
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:  name of the test suite
-//   name:             name of the test
-//   type_param:       the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param:      text representation of the test's value parameter,
-//                     or NULL if this is not a value-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory) {
-  TestInfo* const test_info =
-      new TestInfo(test_suite_name, name, type_param, value_param,
-                   code_location, fixture_class_id, factory);
-  GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
-  return test_info;
-}
-
-void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                CodeLocation code_location) {
-  Message errors;
-  errors
-      << "Attempted redefinition of test suite " << test_suite_name << ".\n"
-      << "All tests in the same test suite must use the same test fixture\n"
-      << "class.  However, in test suite " << test_suite_name << ", you tried\n"
-      << "to define a test using a fixture class different from the one\n"
-      << "used earlier. This can happen if the two fixture classes are\n"
-      << "from different namespaces and have the same name. You should\n"
-      << "probably rename one of the classes to put the tests into different\n"
-      << "test suites.";
-
-  GTEST_LOG_(ERROR) << FormatFileLocation(code_location.file.c_str(),
-                                          code_location.line)
-                    << " " << errors.GetString();
-}
-}  // namespace internal
-
-namespace {
-
-// A predicate that checks the test name of a TestInfo against a known
-// value.
-//
-// This is used for implementation of the TestSuite class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestNameIs is copyable.
-class TestNameIs {
- public:
-  // Constructor.
-  //
-  // TestNameIs has NO default constructor.
-  explicit TestNameIs(const char* name)
-      : name_(name) {}
-
-  // Returns true if and only if the test name of test_info matches name_.
-  bool operator()(const TestInfo * test_info) const {
-    return test_info && test_info->name() == name_;
-  }
-
- private:
-  std::string name_;
-};
-
-}  // namespace
-
-namespace internal {
-
-// This method expands all parameterized tests registered with macros TEST_P
-// and INSTANTIATE_TEST_SUITE_P into regular tests and registers those.
-// This will be done just once during the program runtime.
-void UnitTestImpl::RegisterParameterizedTests() {
-  if (!parameterized_tests_registered_) {
-    parameterized_test_registry_.RegisterTests();
-    type_parameterized_test_registry_.CheckForInstantiations();
-    parameterized_tests_registered_ = true;
-  }
-}
-
-}  // namespace internal
-
-// Creates the test object, runs it, records its result, and then
-// deletes it.
-void TestInfo::Run() {
-  if (!should_run_) return;
-
-  // Tells UnitTest where to store test result.
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_info(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Notifies the unit test event listeners that a test is about to start.
-  repeater->OnTestStart(*this);
-
-  result_.set_start_timestamp(internal::GetTimeInMillis());
-  internal::Timer timer;
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-
-  // Creates the test object.
-  Test* const test = internal::HandleExceptionsInMethodIfSupported(
-      factory_, &internal::TestFactoryBase::CreateTest,
-      "the test fixture's constructor");
-
-  // Runs the test if the constructor didn't generate a fatal failure or invoke
-  // GTEST_SKIP().
-  // Note that the object will not be null
-  if (!Test::HasFatalFailure() && !Test::IsSkipped()) {
-    // This doesn't throw as all user code that can throw are wrapped into
-    // exception handling code.
-    test->Run();
-  }
-
-  if (test != nullptr) {
-    // Deletes the test object.
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        test, &Test::DeleteSelf_, "the test fixture's destructor");
-  }
-
-  result_.set_elapsed_time(timer.Elapsed());
-
-  // Notifies the unit test event listener that a test has just finished.
-  repeater->OnTestEnd(*this);
-
-  // Tells UnitTest to stop associating assertion results to this
-  // test.
-  impl->set_current_test_info(nullptr);
-}
-
-// Skip and records a skipped test result for this object.
-void TestInfo::Skip() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_info(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Notifies the unit test event listeners that a test is about to start.
-  repeater->OnTestStart(*this);
-
-  const TestPartResult test_part_result =
-      TestPartResult(TestPartResult::kSkip, this->file(), this->line(), "");
-  impl->GetTestPartResultReporterForCurrentThread()->ReportTestPartResult(
-      test_part_result);
-
-  // Notifies the unit test event listener that a test has just finished.
-  repeater->OnTestEnd(*this);
-  impl->set_current_test_info(nullptr);
-}
-
-// class TestSuite
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::successful_test_count() const {
-  return CountIf(test_info_list_, TestPassed);
-}
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::skipped_test_count() const {
-  return CountIf(test_info_list_, TestSkipped);
-}
-
-// Gets the number of failed tests in this test suite.
-int TestSuite::failed_test_count() const {
-  return CountIf(test_info_list_, TestFailed);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int TestSuite::reportable_disabled_test_count() const {
-  return CountIf(test_info_list_, TestReportableDisabled);
-}
-
-// Gets the number of disabled tests in this test suite.
-int TestSuite::disabled_test_count() const {
-  return CountIf(test_info_list_, TestDisabled);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int TestSuite::reportable_test_count() const {
-  return CountIf(test_info_list_, TestReportable);
-}
-
-// Get the number of tests in this test suite that should run.
-int TestSuite::test_to_run_count() const {
-  return CountIf(test_info_list_, ShouldRunTest);
-}
-
-// Gets the number of all tests.
-int TestSuite::total_test_count() const {
-  return static_cast<int>(test_info_list_.size());
-}
-
-// Creates a TestSuite with the given name.
-//
-// Arguments:
-//
-//   a_name:       name of the test suite
-//   a_type_param: the name of the test suite's type parameter, or NULL if
-//                 this is not a typed or a type-parameterized test suite.
-//   set_up_tc:    pointer to the function that sets up the test suite
-//   tear_down_tc: pointer to the function that tears down the test suite
-TestSuite::TestSuite(const char* a_name, const char* a_type_param,
-                     internal::SetUpTestSuiteFunc set_up_tc,
-                     internal::TearDownTestSuiteFunc tear_down_tc)
-    : name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      set_up_tc_(set_up_tc),
-      tear_down_tc_(tear_down_tc),
-      should_run_(false),
-      start_timestamp_(0),
-      elapsed_time_(0) {}
-
-// Destructor of TestSuite.
-TestSuite::~TestSuite() {
-  // Deletes every Test in the collection.
-  ForEach(test_info_list_, internal::Delete<TestInfo>);
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-const TestInfo* TestSuite::GetTestInfo(int i) const {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-TestInfo* TestSuite::GetMutableTestInfo(int i) {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Adds a test to this test suite.  Will delete the test upon
-// destruction of the TestSuite object.
-void TestSuite::AddTestInfo(TestInfo* test_info) {
-  test_info_list_.push_back(test_info);
-  test_indices_.push_back(static_cast<int>(test_indices_.size()));
-}
-
-// Runs every test in this TestSuite.
-void TestSuite::Run() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_suite(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteStart(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseStart(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunSetUpTestSuite, "SetUpTestSuite()");
-
-  start_timestamp_ = internal::GetTimeInMillis();
-  internal::Timer timer;
-  for (int i = 0; i < total_test_count(); i++) {
-    GetMutableTestInfo(i)->Run();
-    if (GTEST_FLAG(fail_fast) && GetMutableTestInfo(i)->result()->Failed()) {
-      for (int j = i + 1; j < total_test_count(); j++) {
-        GetMutableTestInfo(j)->Skip();
-      }
-      break;
-    }
-  }
-  elapsed_time_ = timer.Elapsed();
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunTearDownTestSuite, "TearDownTestSuite()");
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteEnd(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseEnd(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  impl->set_current_test_suite(nullptr);
-}
-
-// Skips all tests under this TestSuite.
-void TestSuite::Skip() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_suite(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteStart(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseStart(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  for (int i = 0; i < total_test_count(); i++) {
-    GetMutableTestInfo(i)->Skip();
-  }
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteEnd(*this);
-  // Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseEnd(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  impl->set_current_test_suite(nullptr);
-}
-
-// Clears the results of all tests in this test suite.
-void TestSuite::ClearResult() {
-  ad_hoc_test_result_.Clear();
-  ForEach(test_info_list_, TestInfo::ClearTestResult);
-}
-
-// Shuffles the tests in this test suite.
-void TestSuite::ShuffleTests(internal::Random* random) {
-  Shuffle(random, &test_indices_);
-}
-
-// Restores the test order to before the first shuffle.
-void TestSuite::UnshuffleTests() {
-  for (size_t i = 0; i < test_indices_.size(); i++) {
-    test_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Formats a countable noun.  Depending on its quantity, either the
-// singular form or the plural form is used. e.g.
-//
-// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
-// FormatCountableNoun(5, "book", "books") returns "5 books".
-static std::string FormatCountableNoun(int count,
-                                       const char * singular_form,
-                                       const char * plural_form) {
-  return internal::StreamableToString(count) + " " +
-      (count == 1 ? singular_form : plural_form);
-}
-
-// Formats the count of tests.
-static std::string FormatTestCount(int test_count) {
-  return FormatCountableNoun(test_count, "test", "tests");
-}
-
-// Formats the count of test suites.
-static std::string FormatTestSuiteCount(int test_suite_count) {
-  return FormatCountableNoun(test_suite_count, "test suite", "test suites");
-}
-
-// Converts a TestPartResult::Type enum to human-friendly string
-// representation.  Both kNonFatalFailure and kFatalFailure are translated
-// to "Failure", as the user usually doesn't care about the difference
-// between the two when viewing the test result.
-static const char * TestPartResultTypeToString(TestPartResult::Type type) {
-  switch (type) {
-    case TestPartResult::kSkip:
-      return "Skipped\n";
-    case TestPartResult::kSuccess:
-      return "Success";
-
-    case TestPartResult::kNonFatalFailure:
-    case TestPartResult::kFatalFailure:
-#ifdef _MSC_VER
-      return "error: ";
-#else
-      return "Failure\n";
-#endif
-    default:
-      return "Unknown result type";
-  }
-}
-
-namespace internal {
-namespace {
-enum class GTestColor { kDefault, kRed, kGreen, kYellow };
-}  // namespace
-
-// Prints a TestPartResult to an std::string.
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result) {
-  return (Message()
-          << internal::FormatFileLocation(test_part_result.file_name(),
-                                          test_part_result.line_number())
-          << " " << TestPartResultTypeToString(test_part_result.type())
-          << test_part_result.message()).GetString();
-}
-
-// Prints a TestPartResult.
-static void PrintTestPartResult(const TestPartResult& test_part_result) {
-  const std::string& result =
-      PrintTestPartResultToString(test_part_result);
-  printf("%s\n", result.c_str());
-  fflush(stdout);
-  // If the test program runs in Visual Studio or a debugger, the
-  // following statements add the test part result message to the Output
-  // window such that the user can double-click on it to jump to the
-  // corresponding source code location; otherwise they do nothing.
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  // We don't call OutputDebugString*() on Windows Mobile, as printing
-  // to stdout is done by OutputDebugString() there already - we don't
-  // want the same message printed twice.
-  ::OutputDebugStringA(result.c_str());
-  ::OutputDebugStringA("\n");
-#endif
-}
-
-// class PrettyUnitTestResultPrinter
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-
-// Returns the character attribute for the given color.
-static WORD GetColorAttribute(GTestColor color) {
-  switch (color) {
-    case GTestColor::kRed:
-      return FOREGROUND_RED;
-    case GTestColor::kGreen:
-      return FOREGROUND_GREEN;
-    case GTestColor::kYellow:
-      return FOREGROUND_RED | FOREGROUND_GREEN;
-    default:           return 0;
-  }
-}
-
-static int GetBitOffset(WORD color_mask) {
-  if (color_mask == 0) return 0;
-
-  int bitOffset = 0;
-  while ((color_mask & 1) == 0) {
-    color_mask >>= 1;
-    ++bitOffset;
-  }
-  return bitOffset;
-}
-
-static WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
-  // Let's reuse the BG
-  static const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
-                                      BACKGROUND_RED | BACKGROUND_INTENSITY;
-  static const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
-                                      FOREGROUND_RED | FOREGROUND_INTENSITY;
-  const WORD existing_bg = old_color_attrs & background_mask;
-
-  WORD new_color =
-      GetColorAttribute(color) | existing_bg | FOREGROUND_INTENSITY;
-  static const int bg_bitOffset = GetBitOffset(background_mask);
-  static const int fg_bitOffset = GetBitOffset(foreground_mask);
-
-  if (((new_color & background_mask) >> bg_bitOffset) ==
-      ((new_color & foreground_mask) >> fg_bitOffset)) {
-    new_color ^= FOREGROUND_INTENSITY;  // invert intensity
-  }
-  return new_color;
-}
-
-#else
-
-// Returns the ANSI color code for the given color. GTestColor::kDefault is
-// an invalid input.
-static const char* GetAnsiColorCode(GTestColor color) {
-  switch (color) {
-    case GTestColor::kRed:
-      return "1";
-    case GTestColor::kGreen:
-      return "2";
-    case GTestColor::kYellow:
-      return "3";
-    default:
-      return nullptr;
-  }
-}
-
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-
-// Returns true if and only if Google Test should use colors in the output.
-bool ShouldUseColor(bool stdout_is_tty) {
-  const char* const gtest_color = GTEST_FLAG(color).c_str();
-
-  if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-    // On Windows the TERM variable is usually not set, but the
-    // console there does support colors.
-    return stdout_is_tty;
-#else
-    // On non-Windows platforms, we rely on the TERM variable.
-    const char* const term = posix::GetEnv("TERM");
-    const bool term_supports_color =
-        String::CStringEquals(term, "xterm") ||
-        String::CStringEquals(term, "xterm-color") ||
-        String::CStringEquals(term, "xterm-256color") ||
-        String::CStringEquals(term, "screen") ||
-        String::CStringEquals(term, "screen-256color") ||
-        String::CStringEquals(term, "tmux") ||
-        String::CStringEquals(term, "tmux-256color") ||
-        String::CStringEquals(term, "rxvt-unicode") ||
-        String::CStringEquals(term, "rxvt-unicode-256color") ||
-        String::CStringEquals(term, "linux") ||
-        String::CStringEquals(term, "cygwin");
-    return stdout_is_tty && term_supports_color;
-#endif  // GTEST_OS_WINDOWS
-  }
-
-  return String::CaseInsensitiveCStringEquals(gtest_color, "yes") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "true") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "t") ||
-      String::CStringEquals(gtest_color, "1");
-  // We take "yes", "true", "t", and "1" as meaning "yes".  If the
-  // value is neither one of these nor "auto", we treat it as "no" to
-  // be conservative.
-}
-
-// Helpers for printing colored strings to stdout. Note that on Windows, we
-// cannot simply emit special characters and have the terminal change colors.
-// This routine must actually emit the characters rather than return a string
-// that would be colored when printed, as can be done on Linux.
-
-GTEST_ATTRIBUTE_PRINTF_(2, 3)
-static void ColoredPrintf(GTestColor color, const char *fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS || GTEST_OS_IOS || \
-    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT || defined(ESP_PLATFORM)
-  const bool use_color = AlwaysFalse();
-#else
-  static const bool in_color_mode =
-      ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
-  const bool use_color = in_color_mode && (color != GTestColor::kDefault);
-#endif  // GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS
-
-  if (!use_color) {
-    vprintf(fmt, args);
-    va_end(args);
-    return;
-  }
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-  const WORD new_color = GetNewColor(color, old_color_attrs);
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle, new_color);
-
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  printf("\033[0;3%sm", GetAnsiColorCode(color));
-  vprintf(fmt, args);
-  printf("\033[m");  // Resets the terminal to default.
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  va_end(args);
-}
-
-// Text printed in Google Test's text output and --gtest_list_tests
-// output to label the type parameter and value parameter for a test.
-static const char kTypeParamLabel[] = "TypeParam";
-static const char kValueParamLabel[] = "GetParam()";
-
-static void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
-  const char* const type_param = test_info.type_param();
-  const char* const value_param = test_info.value_param();
-
-  if (type_param != nullptr || value_param != nullptr) {
-    printf(", where ");
-    if (type_param != nullptr) {
-      printf("%s = %s", kTypeParamLabel, type_param);
-      if (value_param != nullptr) printf(" and ");
-    }
-    if (value_param != nullptr) {
-      printf("%s = %s", kValueParamLabel, value_param);
-    }
-  }
-}
-
-// This class implements the TestEventListener interface.
-//
-// Class PrettyUnitTestResultPrinter is copyable.
-class PrettyUnitTestResultPrinter : public TestEventListener {
- public:
-  PrettyUnitTestResultPrinter() {}
-  static void PrintTestName(const char* test_suite, const char* test) {
-    printf("%s.%s", test_suite, test);
-  }
-
-  // The following methods override what's in the TestEventListener class.
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& test_case) override;
-#else
-  void OnTestSuiteStart(const TestSuite& test_suite) override;
-#endif  // OnTestCaseStart
-
-  void OnTestStart(const TestInfo& test_info) override;
-
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& test_case) override;
-#else
-  void OnTestSuiteEnd(const TestSuite& test_suite) override;
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-
- private:
-  static void PrintFailedTests(const UnitTest& unit_test);
-  static void PrintFailedTestSuites(const UnitTest& unit_test);
-  static void PrintSkippedTests(const UnitTest& unit_test);
-};
-
-  // Fired before each iteration of tests starts.
-void PrettyUnitTestResultPrinter::OnTestIterationStart(
-    const UnitTest& unit_test, int iteration) {
-  if (GTEST_FLAG(repeat) != 1)
-    printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);
-
-  const char* const filter = GTEST_FLAG(filter).c_str();
-
-  // Prints the filter if it's not *.  This reminds the user that some
-  // tests may be skipped.
-  if (!String::CStringEquals(filter, kUniversalFilter)) {
-    ColoredPrintf(GTestColor::kYellow, "Note: %s filter = %s\n", GTEST_NAME_,
-                  filter);
-  }
-
-  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
-    const int32_t shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
-    ColoredPrintf(GTestColor::kYellow, "Note: This is test shard %d of %s.\n",
-                  static_cast<int>(shard_index) + 1,
-                  internal::posix::GetEnv(kTestTotalShards));
-  }
-
-  if (GTEST_FLAG(shuffle)) {
-    ColoredPrintf(GTestColor::kYellow,
-                  "Note: Randomizing tests' orders with a seed of %d .\n",
-                  unit_test.random_seed());
-  }
-
-  ColoredPrintf(GTestColor::kGreen, "[==========] ");
-  printf("Running %s from %s.\n",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  fflush(stdout);
-}
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("Global test environment set-up.\n");
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_case.name());
-  if (test_case.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_case.type_param());
-  }
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteStart(
-    const TestSuite& test_suite) {
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_suite.name());
-  if (test_suite.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_suite.type_param());
-  }
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
-  ColoredPrintf(GTestColor::kGreen, "[ RUN      ] ");
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  printf("\n");
-  fflush(stdout);
-}
-
-// Called after an assertion failure.
-void PrettyUnitTestResultPrinter::OnTestPartResult(
-    const TestPartResult& result) {
-  switch (result.type()) {
-    // If the test part succeeded, we don't need to do anything.
-    case TestPartResult::kSuccess:
-      return;
-    default:
-      // Print failure message from the assertion
-      // (e.g. expected this and got that).
-      PrintTestPartResult(result);
-      fflush(stdout);
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
-  if (test_info.result()->Passed()) {
-    ColoredPrintf(GTestColor::kGreen, "[       OK ] ");
-  } else if (test_info.result()->Skipped()) {
-    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-  } else {
-    ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-  }
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  if (test_info.result()->Failed())
-    PrintFullTestCommentIfPresent(test_info);
-
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms)\n", internal::StreamableToString(
-           test_info.result()->elapsed_time()).c_str());
-  } else {
-    printf("\n");
-  }
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_case.name(),
-         internal::StreamableToString(test_case.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteEnd(const TestSuite& test_suite) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_suite.name(),
-         internal::StreamableToString(test_suite.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("Global test environment tear-down\n");
-  fflush(stdout);
-}
-
-// Internal helper for printing the list of failed tests.
-void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
-  const int failed_test_count = unit_test.failed_test_count();
-  ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-  printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.failed_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Failed()) {
-        continue;
-      }
-      ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      PrintFullTestCommentIfPresent(test_info);
-      printf("\n");
-    }
-  }
-  printf("\n%2d FAILED %s\n", failed_test_count,
-         failed_test_count == 1 ? "TEST" : "TESTS");
-}
-
-// Internal helper for printing the list of test suite failures not covered by
-// PrintFailedTests.
-void PrettyUnitTestResultPrinter::PrintFailedTestSuites(
-    const UnitTest& unit_test) {
-  int suite_failure_count = 0;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run()) {
-      continue;
-    }
-    if (test_suite.ad_hoc_test_result().Failed()) {
-      ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-      printf("%s: SetUpTestSuite or TearDownTestSuite\n", test_suite.name());
-      ++suite_failure_count;
-    }
-  }
-  if (suite_failure_count > 0) {
-    printf("\n%2d FAILED TEST %s\n", suite_failure_count,
-           suite_failure_count == 1 ? "SUITE" : "SUITES");
-  }
-}
-
-// Internal helper for printing the list of skipped tests.
-void PrettyUnitTestResultPrinter::PrintSkippedTests(const UnitTest& unit_test) {
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count == 0) {
-    return;
-  }
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.skipped_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Skipped()) {
-        continue;
-      }
-      ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      printf("\n");
-    }
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                     int /*iteration*/) {
-  ColoredPrintf(GTestColor::kGreen, "[==========] ");
-  printf("%s from %s ran.",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms total)",
-           internal::StreamableToString(unit_test.elapsed_time()).c_str());
-  }
-  printf("\n");
-  ColoredPrintf(GTestColor::kGreen, "[  PASSED  ] ");
-  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
-
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count > 0) {
-    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-    printf("%s, listed below:\n", FormatTestCount(skipped_test_count).c_str());
-    PrintSkippedTests(unit_test);
-  }
-
-  if (!unit_test.Passed()) {
-    PrintFailedTests(unit_test);
-    PrintFailedTestSuites(unit_test);
-  }
-
-  int num_disabled = unit_test.reportable_disabled_test_count();
-  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
-    if (unit_test.Passed()) {
-      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
-    }
-    ColoredPrintf(GTestColor::kYellow, "  YOU HAVE %d DISABLED %s\n\n",
-                  num_disabled, num_disabled == 1 ? "TEST" : "TESTS");
-  }
-  // Ensure that Google Test output is printed before, e.g., heapchecker output.
-  fflush(stdout);
-}
-
-// End PrettyUnitTestResultPrinter
-
-// This class implements the TestEventListener interface.
-//
-// Class BriefUnitTestResultPrinter is copyable.
-class BriefUnitTestResultPrinter : public TestEventListener {
- public:
-  BriefUnitTestResultPrinter() {}
-  static void PrintTestName(const char* test_suite, const char* test) {
-    printf("%s.%s", test_suite, test);
-  }
-
-  // The following methods override what's in the TestEventListener class.
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {}
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
-#else
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
-#endif  // OnTestCaseStart
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {}
-
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
-#else
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-};
-
-// Called after an assertion failure.
-void BriefUnitTestResultPrinter::OnTestPartResult(
-    const TestPartResult& result) {
-  switch (result.type()) {
-    // If the test part succeeded, we don't need to do anything.
-    case TestPartResult::kSuccess:
-      return;
-    default:
-      // Print failure message from the assertion
-      // (e.g. expected this and got that).
-      PrintTestPartResult(result);
-      fflush(stdout);
-  }
-}
-
-void BriefUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
-  if (test_info.result()->Failed()) {
-    ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-    PrintTestName(test_info.test_suite_name(), test_info.name());
-    PrintFullTestCommentIfPresent(test_info);
-
-    if (GTEST_FLAG(print_time)) {
-      printf(" (%s ms)\n",
-             internal::StreamableToString(test_info.result()->elapsed_time())
-                 .c_str());
-    } else {
-      printf("\n");
-    }
-    fflush(stdout);
-  }
-}
-
-void BriefUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                    int /*iteration*/) {
-  ColoredPrintf(GTestColor::kGreen, "[==========] ");
-  printf("%s from %s ran.",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms total)",
-           internal::StreamableToString(unit_test.elapsed_time()).c_str());
-  }
-  printf("\n");
-  ColoredPrintf(GTestColor::kGreen, "[  PASSED  ] ");
-  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
-
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count > 0) {
-    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-    printf("%s.\n", FormatTestCount(skipped_test_count).c_str());
-  }
-
-  int num_disabled = unit_test.reportable_disabled_test_count();
-  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
-    if (unit_test.Passed()) {
-      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
-    }
-    ColoredPrintf(GTestColor::kYellow, "  YOU HAVE %d DISABLED %s\n\n",
-                  num_disabled, num_disabled == 1 ? "TEST" : "TESTS");
-  }
-  // Ensure that Google Test output is printed before, e.g., heapchecker output.
-  fflush(stdout);
-}
-
-// End BriefUnitTestResultPrinter
-
-// class TestEventRepeater
-//
-// This class forwards events to other event listeners.
-class TestEventRepeater : public TestEventListener {
- public:
-  TestEventRepeater() : forwarding_enabled_(true) {}
-  ~TestEventRepeater() override;
-  void Append(TestEventListener *listener);
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled() const { return forwarding_enabled_; }
-  void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }
-
-  void OnTestProgramStart(const UnitTest& unit_test) override;
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestSuite& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteStart(const TestSuite& parameter) override;
-  void OnTestStart(const TestInfo& test_info) override;
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteEnd(const TestSuite& parameter) override;
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) override;
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& unit_test) override;
-
- private:
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled_;
-  // The list of listeners that receive events.
-  std::vector<TestEventListener*> listeners_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
-};
-
-TestEventRepeater::~TestEventRepeater() {
-  ForEach(listeners_, Delete<TestEventListener>);
-}
-
-void TestEventRepeater::Append(TestEventListener *listener) {
-  listeners_.push_back(listener);
-}
-
-TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
-  for (size_t i = 0; i < listeners_.size(); ++i) {
-    if (listeners_[i] == listener) {
-      listeners_.erase(listeners_.begin() + static_cast<int>(i));
-      return listener;
-    }
-  }
-
-  return nullptr;
-}
-
-// Since most methods are very similar, use macros to reduce boilerplate.
-// This defines a member that forwards the call to all listeners.
-#define GTEST_REPEATER_METHOD_(Name, Type) \
-void TestEventRepeater::Name(const Type& parameter) { \
-  if (forwarding_enabled_) { \
-    for (size_t i = 0; i < listeners_.size(); i++) { \
-      listeners_[i]->Name(parameter); \
-    } \
-  } \
-}
-// This defines a member that forwards the call to all listeners in reverse
-// order.
-#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type)      \
-  void TestEventRepeater::Name(const Type& parameter) { \
-    if (forwarding_enabled_) {                          \
-      for (size_t i = listeners_.size(); i != 0; i--) { \
-        listeners_[i - 1]->Name(parameter);             \
-      }                                                 \
-    }                                                   \
-  }
-
-GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
-GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestCaseStart, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestSuiteStart, TestSuite)
-GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
-GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
-GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestSuiteEnd, TestSuite)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)
-
-#undef GTEST_REPEATER_METHOD_
-#undef GTEST_REVERSE_REPEATER_METHOD_
-
-void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
-                                             int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = 0; i < listeners_.size(); i++) {
-      listeners_[i]->OnTestIterationStart(unit_test, iteration);
-    }
-  }
-}
-
-void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
-                                           int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = listeners_.size(); i > 0; i--) {
-      listeners_[i - 1]->OnTestIterationEnd(unit_test, iteration);
-    }
-  }
-}
-
-// End TestEventRepeater
-
-// This class generates an XML output file.
-class XmlUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit XmlUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void ListTestsMatchingFilter(const std::vector<TestSuite*>& test_suites);
-
-  // Prints an XML summary of all unit tests.
-  static void PrintXmlTestsList(std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Is c a whitespace character that is normalized to a space character
-  // when it appears in an XML attribute value?
-  static bool IsNormalizableWhitespace(char c) {
-    return c == 0x9 || c == 0xA || c == 0xD;
-  }
-
-  // May c appear in a well-formed XML document?
-  static bool IsValidXmlCharacter(char c) {
-    return IsNormalizableWhitespace(c) || c >= 0x20;
-  }
-
-  // Returns an XML-escaped copy of the input string str.  If
-  // is_attribute is true, the text is meant to appear as an attribute
-  // value, and normalizable whitespace is preserved by replacing it
-  // with character references.
-  static std::string EscapeXml(const std::string& str, bool is_attribute);
-
-  // Returns the given string with all characters invalid in XML removed.
-  static std::string RemoveInvalidXmlCharacters(const std::string& str);
-
-  // Convenience wrapper around EscapeXml when str is an attribute value.
-  static std::string EscapeXmlAttribute(const std::string& str) {
-    return EscapeXml(str, true);
-  }
-
-  // Convenience wrapper around EscapeXml when str is not an attribute value.
-  static std::string EscapeXmlText(const char* str) {
-    return EscapeXml(str, false);
-  }
-
-  // Verifies that the given attribute belongs to the given element and
-  // streams the attribute as XML.
-  static void OutputXmlAttribute(std::ostream* stream,
-                                 const std::string& element_name,
-                                 const std::string& name,
-                                 const std::string& value);
-
-  // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-  static void OutputXmlCDataSection(::std::ostream* stream, const char* data);
-
-  // Streams a test suite XML stanza containing the given test result.
-  //
-  // Requires: result.Failed()
-  static void OutputXmlTestSuiteForTestResult(::std::ostream* stream,
-                                              const TestResult& result);
-
-  // Streams an XML representation of a TestResult object.
-  static void OutputXmlTestResult(::std::ostream* stream,
-                                  const TestResult& result);
-
-  // Streams an XML representation of a TestInfo object.
-  static void OutputXmlTestInfo(::std::ostream* stream,
-                                const char* test_suite_name,
-                                const TestInfo& test_info);
-
-  // Prints an XML representation of a TestSuite object
-  static void PrintXmlTestSuite(::std::ostream* stream,
-                                const TestSuite& test_suite);
-
-  // Prints an XML summary of unit_test to output stream out.
-  static void PrintXmlUnitTest(::std::ostream* stream,
-                               const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as space
-  // delimited XML attributes based on the property key="value" pairs.
-  // When the std::string is not empty, it includes a space at the beginning,
-  // to delimit this attribute from prior attributes.
-  static std::string TestPropertiesAsXmlAttributes(const TestResult& result);
-
-  // Streams an XML representation of the test properties of a TestResult
-  // object.
-  static void OutputXmlTestProperties(std::ostream* stream,
-                                      const TestResult& result);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
-};
-
-// Creates a new XmlUnitTestResultPrinter.
-XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "XML output file may not be null";
-  }
-}
-
-// Called after the unit test ends.
-void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlUnitTest(&stream, unit_test);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-void XmlUnitTestResultPrinter::ListTestsMatchingFilter(
-    const std::vector<TestSuite*>& test_suites) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlTestsList(&stream, test_suites);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-// Returns an XML-escaped copy of the input string str.  If is_attribute
-// is true, the text is meant to appear as an attribute value, and
-// normalizable whitespace is preserved by replacing it with character
-// references.
-//
-// Invalid XML characters in str, if any, are stripped from the output.
-// It is expected that most, if not all, of the text processed by this
-// module will consist of ordinary English text.
-// If this module is ever modified to produce version 1.1 XML output,
-// most invalid characters can be retained using character references.
-std::string XmlUnitTestResultPrinter::EscapeXml(
-    const std::string& str, bool is_attribute) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '<':
-        m << "&lt;";
-        break;
-      case '>':
-        m << "&gt;";
-        break;
-      case '&':
-        m << "&amp;";
-        break;
-      case '\'':
-        if (is_attribute)
-          m << "&apos;";
-        else
-          m << '\'';
-        break;
-      case '"':
-        if (is_attribute)
-          m << "&quot;";
-        else
-          m << '"';
-        break;
-      default:
-        if (IsValidXmlCharacter(ch)) {
-          if (is_attribute && IsNormalizableWhitespace(ch))
-            m << "&#x" << String::FormatByte(static_cast<unsigned char>(ch))
-              << ";";
-          else
-            m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// Returns the given string with all characters invalid in XML removed.
-// Currently invalid characters are dropped from the string. An
-// alternative is to replace them with certain characters such as . or ?.
-std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
-    const std::string& str) {
-  std::string output;
-  output.reserve(str.size());
-  for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
-    if (IsValidXmlCharacter(*it))
-      output.push_back(*it);
-
-  return output;
-}
-
-// The following routines generate an XML representation of a UnitTest
-// object.
-// GOOGLETEST_CM0009 DO NOT DELETE
-//
-// This is how Google Test concepts map to the DTD:
-//
-// <testsuites name="AllTests">        <-- corresponds to a UnitTest object
-//   <testsuite name="testcase-name">  <-- corresponds to a TestSuite object
-//     <testcase name="test-name">     <-- corresponds to a TestInfo object
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//                                     <-- individual assertion failures
-//     </testcase>
-//   </testsuite>
-// </testsuites>
-
-// Formats the given time in milliseconds as seconds.
-std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3);
-  return ss.str();
-}
-
-static bool PortableLocaltime(time_t seconds, struct tm* out) {
-#if defined(_MSC_VER)
-  return localtime_s(out, &seconds) == 0;
-#elif defined(__MINGW32__) || defined(__MINGW64__)
-  // MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
-  // Windows' localtime(), which has a thread-local tm buffer.
-  struct tm* tm_ptr = localtime(&seconds);  // NOLINT
-  if (tm_ptr == nullptr) return false;
-  *out = *tm_ptr;
-  return true;
-#elif defined(__STDC_LIB_EXT1__)
-  // Uses localtime_s when available as localtime_r is only available from
-  // C23 standard.
-  return localtime_s(&seconds, out) != nullptr;
-#else
-  return localtime_r(&seconds, out) != nullptr;
-#endif
-}
-
-// Converts the given epoch time in milliseconds to a date string in the ISO
-// 8601 format, without the timezone information.
-std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss.sss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec) + "." +
-      String::FormatIntWidthN(static_cast<int>(ms % 1000), 3);
-}
-
-// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
-                                                     const char* data) {
-  const char* segment = data;
-  *stream << "<![CDATA[";
-  for (;;) {
-    const char* const next_segment = strstr(segment, "]]>");
-    if (next_segment != nullptr) {
-      stream->write(
-          segment, static_cast<std::streamsize>(next_segment - segment));
-      *stream << "]]>]]&gt;<![CDATA[";
-      segment = next_segment + strlen("]]>");
-    } else {
-      *stream << segment;
-      break;
-    }
-  }
-  *stream << "]]>";
-}
-
-void XmlUnitTestResultPrinter::OutputXmlAttribute(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Attribute " << name << " is not allowed for element <" << element_name
-      << ">.";
-
-  *stream << " " << name << "=\"" << EscapeXmlAttribute(value) << "\"";
-}
-
-// Streams a test suite XML stanza containing the given test result.
-void XmlUnitTestResultPrinter::OutputXmlTestSuiteForTestResult(
-    ::std::ostream* stream, const TestResult& result) {
-  // Output the boilerplate for a minimal test suite with one test.
-  *stream << "  <testsuite";
-  OutputXmlAttribute(stream, "testsuite", "name", "NonTestSuiteFailure");
-  OutputXmlAttribute(stream, "testsuite", "tests", "1");
-  OutputXmlAttribute(stream, "testsuite", "failures", "1");
-  OutputXmlAttribute(stream, "testsuite", "disabled", "0");
-  OutputXmlAttribute(stream, "testsuite", "skipped", "0");
-  OutputXmlAttribute(stream, "testsuite", "errors", "0");
-  OutputXmlAttribute(stream, "testsuite", "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, "testsuite", "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-  *stream << ">";
-
-  // Output the boilerplate for a minimal test case with a single test.
-  *stream << "    <testcase";
-  OutputXmlAttribute(stream, "testcase", "name", "");
-  OutputXmlAttribute(stream, "testcase", "status", "run");
-  OutputXmlAttribute(stream, "testcase", "result", "completed");
-  OutputXmlAttribute(stream, "testcase", "classname", "");
-  OutputXmlAttribute(stream, "testcase", "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, "testcase", "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-
-  // Output the actual test result.
-  OutputXmlTestResult(stream, result);
-
-  // Complete the test suite.
-  *stream << "  </testsuite>\n";
-}
-
-// Prints an XML representation of a TestInfo object.
-void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
-                                                 const char* test_suite_name,
-                                                 const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-
-  if (test_info.is_in_another_shard()) {
-    return;
-  }
-
-  *stream << "    <testcase";
-  OutputXmlAttribute(stream, kTestsuite, "name", test_info.name());
-
-  if (test_info.value_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "value_param",
-                       test_info.value_param());
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "type_param",
-                       test_info.type_param());
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "file", test_info.file());
-    OutputXmlAttribute(stream, kTestsuite, "line",
-                       StreamableToString(test_info.line()));
-    *stream << " />\n";
-    return;
-  }
-
-  OutputXmlAttribute(stream, kTestsuite, "status",
-                     test_info.should_run() ? "run" : "notrun");
-  OutputXmlAttribute(stream, kTestsuite, "result",
-                     test_info.should_run()
-                         ? (result.Skipped() ? "skipped" : "completed")
-                         : "suppressed");
-  OutputXmlAttribute(stream, kTestsuite, "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuite, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-  OutputXmlAttribute(stream, kTestsuite, "classname", test_suite_name);
-
-  OutputXmlTestResult(stream, result);
-}
-
-void XmlUnitTestResultPrinter::OutputXmlTestResult(::std::ostream* stream,
-                                                   const TestResult& result) {
-  int failures = 0;
-  int skips = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      if (++failures == 1 && skips == 0) {
-        *stream << ">\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string summary = location + "\n" + part.summary();
-      *stream << "      <failure message=\""
-              << EscapeXmlAttribute(summary)
-              << "\" type=\"\">";
-      const std::string detail = location + "\n" + part.message();
-      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
-      *stream << "</failure>\n";
-    } else if (part.skipped()) {
-      if (++skips == 1 && failures == 0) {
-        *stream << ">\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string summary = location + "\n" + part.summary();
-      *stream << "      <skipped message=\""
-              << EscapeXmlAttribute(summary.c_str()) << "\">";
-      const std::string detail = location + "\n" + part.message();
-      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
-      *stream << "</skipped>\n";
-    }
-  }
-
-  if (failures == 0 && skips == 0 && result.test_property_count() == 0) {
-    *stream << " />\n";
-  } else {
-    if (failures == 0 && skips == 0) {
-      *stream << ">\n";
-    }
-    OutputXmlTestProperties(stream, result);
-    *stream << "    </testcase>\n";
-  }
-}
-
-// Prints an XML representation of a TestSuite object
-void XmlUnitTestResultPrinter::PrintXmlTestSuite(std::ostream* stream,
-                                                 const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  *stream << "  <" << kTestsuite;
-  OutputXmlAttribute(stream, kTestsuite, "name", test_suite.name());
-  OutputXmlAttribute(stream, kTestsuite, "tests",
-                     StreamableToString(test_suite.reportable_test_count()));
-  if (!GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "failures",
-                       StreamableToString(test_suite.failed_test_count()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "disabled",
-        StreamableToString(test_suite.reportable_disabled_test_count()));
-    OutputXmlAttribute(stream, kTestsuite, "skipped",
-                       StreamableToString(test_suite.skipped_test_count()));
-
-    OutputXmlAttribute(stream, kTestsuite, "errors", "0");
-
-    OutputXmlAttribute(stream, kTestsuite, "time",
-                       FormatTimeInMillisAsSeconds(test_suite.elapsed_time()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsIso8601(test_suite.start_timestamp()));
-    *stream << TestPropertiesAsXmlAttributes(test_suite.ad_hoc_test_result());
-  }
-  *stream << ">\n";
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable())
-      OutputXmlTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-  }
-  *stream << "  </" << kTestsuite << ">\n";
-}
-
-// Prints an XML summary of unit_test to output stream out.
-void XmlUnitTestResultPrinter::PrintXmlUnitTest(std::ostream* stream,
-                                                const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(unit_test.reportable_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "failures",
-                     StreamableToString(unit_test.failed_test_count()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "disabled",
-      StreamableToString(unit_test.reportable_disabled_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "errors", "0");
-  OutputXmlAttribute(stream, kTestsuites, "time",
-                     FormatTimeInMillisAsSeconds(unit_test.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(unit_test.start_timestamp()));
-
-  if (GTEST_FLAG(shuffle)) {
-    OutputXmlAttribute(stream, kTestsuites, "random_seed",
-                       StreamableToString(unit_test.random_seed()));
-  }
-  *stream << TestPropertiesAsXmlAttributes(unit_test.ad_hoc_test_result());
-
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0)
-      PrintXmlTestSuite(stream, *unit_test.GetTestSuite(i));
-  }
-
-  // If there was a test failure outside of one of the test suites (like in a
-  // test environment) include that in the output.
-  if (unit_test.ad_hoc_test_result().Failed()) {
-    OutputXmlTestSuiteForTestResult(stream, unit_test.ad_hoc_test_result());
-  }
-
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-void XmlUnitTestResultPrinter::PrintXmlTestsList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(total_tests));
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (auto test_suite : test_suites) {
-    PrintXmlTestSuite(stream, *test_suite);
-  }
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-// Produces a string representing the test properties in a result as space
-// delimited XML attributes based on the property key="value" pairs.
-std::string XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
-    const TestResult& result) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << " " << property.key() << "="
-        << "\"" << EscapeXmlAttribute(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-void XmlUnitTestResultPrinter::OutputXmlTestProperties(
-    std::ostream* stream, const TestResult& result) {
-  const std::string kProperties = "properties";
-  const std::string kProperty = "property";
-
-  if (result.test_property_count() <= 0) {
-    return;
-  }
-
-  *stream << "<" << kProperties << ">\n";
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    *stream << "<" << kProperty;
-    *stream << " name=\"" << EscapeXmlAttribute(property.key()) << "\"";
-    *stream << " value=\"" << EscapeXmlAttribute(property.value()) << "\"";
-    *stream << "/>\n";
-  }
-  *stream << "</" << kProperties << ">\n";
-}
-
-// End XmlUnitTestResultPrinter
-
-// This class generates an JSON output file.
-class JsonUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit JsonUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-
-  // Prints an JSON summary of all unit tests.
-  static void PrintJsonTestList(::std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Returns an JSON-escaped copy of the input string str.
-  static std::string EscapeJson(const std::string& str);
-
-  //// Verifies that the given attribute belongs to the given element and
-  //// streams the attribute as JSON.
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            const std::string& value,
-                            const std::string& indent,
-                            bool comma = true);
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            int value,
-                            const std::string& indent,
-                            bool comma = true);
-
-  // Streams a test suite JSON stanza containing the given test result.
-  //
-  // Requires: result.Failed()
-  static void OutputJsonTestSuiteForTestResult(::std::ostream* stream,
-                                               const TestResult& result);
-
-  // Streams a JSON representation of a TestResult object.
-  static void OutputJsonTestResult(::std::ostream* stream,
-                                   const TestResult& result);
-
-  // Streams a JSON representation of a TestInfo object.
-  static void OutputJsonTestInfo(::std::ostream* stream,
-                                 const char* test_suite_name,
-                                 const TestInfo& test_info);
-
-  // Prints a JSON representation of a TestSuite object
-  static void PrintJsonTestSuite(::std::ostream* stream,
-                                 const TestSuite& test_suite);
-
-  // Prints a JSON summary of unit_test to output stream out.
-  static void PrintJsonUnitTest(::std::ostream* stream,
-                                const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as
-  // a JSON dictionary.
-  static std::string TestPropertiesAsJson(const TestResult& result,
-                                          const std::string& indent);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(JsonUnitTestResultPrinter);
-};
-
-// Creates a new JsonUnitTestResultPrinter.
-JsonUnitTestResultPrinter::JsonUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "JSON output file may not be null";
-  }
-}
-
-void JsonUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* jsonout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintJsonUnitTest(&stream, unit_test);
-  fprintf(jsonout, "%s", StringStreamToString(&stream).c_str());
-  fclose(jsonout);
-}
-
-// Returns an JSON-escaped copy of the input string str.
-std::string JsonUnitTestResultPrinter::EscapeJson(const std::string& str) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '\\':
-      case '"':
-      case '/':
-        m << '\\' << ch;
-        break;
-      case '\b':
-        m << "\\b";
-        break;
-      case '\t':
-        m << "\\t";
-        break;
-      case '\n':
-        m << "\\n";
-        break;
-      case '\f':
-        m << "\\f";
-        break;
-      case '\r':
-        m << "\\r";
-        break;
-      default:
-        if (ch < ' ') {
-          m << "\\u00" << String::FormatByte(static_cast<unsigned char>(ch));
-        } else {
-          m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// The following routines generate an JSON representation of a UnitTest
-// object.
-
-// Formats the given time in milliseconds as seconds.
-static std::string FormatTimeInMillisAsDuration(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3) << "s";
-  return ss.str();
-}
-
-// Converts the given epoch time in milliseconds to a date string in the
-// RFC3339 format, without the timezone information.
-static std::string FormatEpochTimeInMillisAsRFC3339(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec) + "Z";
-}
-
-static inline std::string Indent(size_t width) {
-  return std::string(width, ' ');
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": \"" << EscapeJson(value) << "\"";
-  if (comma)
-    *stream << ",\n";
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    int value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": " << StreamableToString(value);
-  if (comma)
-    *stream << ",\n";
-}
-
-// Streams a test suite JSON stanza containing the given test result.
-void JsonUnitTestResultPrinter::OutputJsonTestSuiteForTestResult(
-    ::std::ostream* stream, const TestResult& result) {
-  // Output the boilerplate for a new test suite.
-  *stream << Indent(4) << "{\n";
-  OutputJsonKey(stream, "testsuite", "name", "NonTestSuiteFailure", Indent(6));
-  OutputJsonKey(stream, "testsuite", "tests", 1, Indent(6));
-  if (!GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, "testsuite", "failures", 1, Indent(6));
-    OutputJsonKey(stream, "testsuite", "disabled", 0, Indent(6));
-    OutputJsonKey(stream, "testsuite", "skipped", 0, Indent(6));
-    OutputJsonKey(stream, "testsuite", "errors", 0, Indent(6));
-    OutputJsonKey(stream, "testsuite", "time",
-                  FormatTimeInMillisAsDuration(result.elapsed_time()),
-                  Indent(6));
-    OutputJsonKey(stream, "testsuite", "timestamp",
-                  FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                  Indent(6));
-  }
-  *stream << Indent(6) << "\"testsuite\": [\n";
-
-  // Output the boilerplate for a new test case.
-  *stream << Indent(8) << "{\n";
-  OutputJsonKey(stream, "testcase", "name", "", Indent(10));
-  OutputJsonKey(stream, "testcase", "status", "RUN", Indent(10));
-  OutputJsonKey(stream, "testcase", "result", "COMPLETED", Indent(10));
-  OutputJsonKey(stream, "testcase", "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                Indent(10));
-  OutputJsonKey(stream, "testcase", "time",
-                FormatTimeInMillisAsDuration(result.elapsed_time()),
-                Indent(10));
-  OutputJsonKey(stream, "testcase", "classname", "", Indent(10), false);
-  *stream << TestPropertiesAsJson(result, Indent(10));
-
-  // Output the actual test result.
-  OutputJsonTestResult(stream, result);
-
-  // Finish the test suite.
-  *stream << "\n" << Indent(6) << "]\n" << Indent(4) << "}";
-}
-
-// Prints a JSON representation of a TestInfo object.
-void JsonUnitTestResultPrinter::OutputJsonTestInfo(::std::ostream* stream,
-                                                   const char* test_suite_name,
-                                                   const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-  const std::string kIndent = Indent(10);
-
-  *stream << Indent(8) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_info.name(), kIndent);
-
-  if (test_info.value_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "value_param", test_info.value_param(),
-                  kIndent);
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "type_param", test_info.type_param(),
-                  kIndent);
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "file", test_info.file(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "line", test_info.line(), kIndent, false);
-    *stream << "\n" << Indent(8) << "}";
-    return;
-  }
-
-  OutputJsonKey(stream, kTestsuite, "status",
-                test_info.should_run() ? "RUN" : "NOTRUN", kIndent);
-  OutputJsonKey(stream, kTestsuite, "result",
-                test_info.should_run()
-                    ? (result.Skipped() ? "SKIPPED" : "COMPLETED")
-                    : "SUPPRESSED",
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "time",
-                FormatTimeInMillisAsDuration(result.elapsed_time()), kIndent);
-  OutputJsonKey(stream, kTestsuite, "classname", test_suite_name, kIndent,
-                false);
-  *stream << TestPropertiesAsJson(result, kIndent);
-
-  OutputJsonTestResult(stream, result);
-}
-
-void JsonUnitTestResultPrinter::OutputJsonTestResult(::std::ostream* stream,
-                                                     const TestResult& result) {
-  const std::string kIndent = Indent(10);
-
-  int failures = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      *stream << ",\n";
-      if (++failures == 1) {
-        *stream << kIndent << "\"" << "failures" << "\": [\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string message = EscapeJson(location + "\n" + part.message());
-      *stream << kIndent << "  {\n"
-              << kIndent << "    \"failure\": \"" << message << "\",\n"
-              << kIndent << "    \"type\": \"\"\n"
-              << kIndent << "  }";
-    }
-  }
-
-  if (failures > 0)
-    *stream << "\n" << kIndent << "]";
-  *stream << "\n" << Indent(8) << "}";
-}
-
-// Prints an JSON representation of a TestSuite object
-void JsonUnitTestResultPrinter::PrintJsonTestSuite(
-    std::ostream* stream, const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  const std::string kIndent = Indent(6);
-
-  *stream << Indent(4) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_suite.name(), kIndent);
-  OutputJsonKey(stream, kTestsuite, "tests", test_suite.reportable_test_count(),
-                kIndent);
-  if (!GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "failures",
-                  test_suite.failed_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "disabled",
-                  test_suite.reportable_disabled_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "errors", 0, kIndent);
-    OutputJsonKey(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsRFC3339(test_suite.start_timestamp()),
-        kIndent);
-    OutputJsonKey(stream, kTestsuite, "time",
-                  FormatTimeInMillisAsDuration(test_suite.elapsed_time()),
-                  kIndent, false);
-    *stream << TestPropertiesAsJson(test_suite.ad_hoc_test_result(), kIndent)
-            << ",\n";
-  }
-
-  *stream << kIndent << "\"" << kTestsuite << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable()) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      OutputJsonTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-    }
-  }
-  *stream << "\n" << kIndent << "]\n" << Indent(4) << "}";
-}
-
-// Prints a JSON summary of unit_test to output stream out.
-void JsonUnitTestResultPrinter::PrintJsonUnitTest(std::ostream* stream,
-                                                  const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-
-  OutputJsonKey(stream, kTestsuites, "tests", unit_test.reportable_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "failures", unit_test.failed_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "disabled",
-                unit_test.reportable_disabled_test_count(), kIndent);
-  OutputJsonKey(stream, kTestsuites, "errors", 0, kIndent);
-  if (GTEST_FLAG(shuffle)) {
-    OutputJsonKey(stream, kTestsuites, "random_seed", unit_test.random_seed(),
-                  kIndent);
-  }
-  OutputJsonKey(stream, kTestsuites, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(unit_test.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "time",
-                FormatTimeInMillisAsDuration(unit_test.elapsed_time()), kIndent,
-                false);
-
-  *stream << TestPropertiesAsJson(unit_test.ad_hoc_test_result(), kIndent)
-          << ",\n";
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      PrintJsonTestSuite(stream, *unit_test.GetTestSuite(i));
-    }
-  }
-
-  // If there was a test failure outside of one of the test suites (like in a
-  // test environment) include that in the output.
-  if (unit_test.ad_hoc_test_result().Failed()) {
-    OutputJsonTestSuiteForTestResult(stream, unit_test.ad_hoc_test_result());
-  }
-
-  *stream << "\n" << kIndent << "]\n" << "}\n";
-}
-
-void JsonUnitTestResultPrinter::PrintJsonTestList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputJsonKey(stream, kTestsuites, "tests", total_tests, kIndent);
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  for (size_t i = 0; i < test_suites.size(); ++i) {
-    if (i != 0) {
-      *stream << ",\n";
-    }
-    PrintJsonTestSuite(stream, *test_suites[i]);
-  }
-
-  *stream << "\n"
-          << kIndent << "]\n"
-          << "}\n";
-}
-// Produces a string representing the test properties in a result as
-// a JSON dictionary.
-std::string JsonUnitTestResultPrinter::TestPropertiesAsJson(
-    const TestResult& result, const std::string& indent) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << ",\n" << indent << "\"" << property.key() << "\": "
-               << "\"" << EscapeJson(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-// End JsonUnitTestResultPrinter
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
-// replaces them by "%xx" where xx is their hexadecimal value. For
-// example, replaces "=" with "%3D".  This algorithm is O(strlen(str))
-// in both time and space -- important as the input str may contain an
-// arbitrarily long test failure message and stack trace.
-std::string StreamingListener::UrlEncode(const char* str) {
-  std::string result;
-  result.reserve(strlen(str) + 1);
-  for (char ch = *str; ch != '\0'; ch = *++str) {
-    switch (ch) {
-      case '%':
-      case '=':
-      case '&':
-      case '\n':
-        result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
-        break;
-      default:
-        result.push_back(ch);
-        break;
-    }
-  }
-  return result;
-}
-
-void StreamingListener::SocketWriter::MakeConnection() {
-  GTEST_CHECK_(sockfd_ == -1)
-      << "MakeConnection() can't be called when there is already a connection.";
-
-  addrinfo hints;
-  memset(&hints, 0, sizeof(hints));
-  hints.ai_family = AF_UNSPEC;    // To allow both IPv4 and IPv6 addresses.
-  hints.ai_socktype = SOCK_STREAM;
-  addrinfo* servinfo = nullptr;
-
-  // Use the getaddrinfo() to get a linked list of IP addresses for
-  // the given host name.
-  const int error_num = getaddrinfo(
-      host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
-  if (error_num != 0) {
-    GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
-                        << gai_strerror(error_num);
-  }
-
-  // Loop through all the results and connect to the first we can.
-  for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != nullptr;
-       cur_addr = cur_addr->ai_next) {
-    sockfd_ = socket(
-        cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
-    if (sockfd_ != -1) {
-      // Connect the client socket to the server socket.
-      if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
-        close(sockfd_);
-        sockfd_ = -1;
-      }
-    }
-  }
-
-  freeaddrinfo(servinfo);  // all done with this structure
-
-  if (sockfd_ == -1) {
-    GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
-                        << host_name_ << ":" << port_num_;
-  }
-}
-
-// End of class Streaming Listener
-#endif  // GTEST_CAN_STREAM_RESULTS__
-
-// class OsStackTraceGetter
-
-const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
-    "... " GTEST_NAME_ " internal frames ...";
-
-std::string OsStackTraceGetter::CurrentStackTrace(int max_depth, int skip_count)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  std::string result;
-
-  if (max_depth <= 0) {
-    return result;
-  }
-
-  max_depth = std::min(max_depth, kMaxStackTraceDepth);
-
-  std::vector<void*> raw_stack(max_depth);
-  // Skips the frames requested by the caller, plus this function.
-  const int raw_stack_size =
-      absl::GetStackTrace(&raw_stack[0], max_depth, skip_count + 1);
-
-  void* caller_frame = nullptr;
-  {
-    MutexLock lock(&mutex_);
-    caller_frame = caller_frame_;
-  }
-
-  for (int i = 0; i < raw_stack_size; ++i) {
-    if (raw_stack[i] == caller_frame &&
-        !GTEST_FLAG(show_internal_stack_frames)) {
-      // Add a marker to the trace and stop adding frames.
-      absl::StrAppend(&result, kElidedFramesMarker, "\n");
-      break;
-    }
-
-    char tmp[1024];
-    const char* symbol = "(unknown)";
-    if (absl::Symbolize(raw_stack[i], tmp, sizeof(tmp))) {
-      symbol = tmp;
-    }
-
-    char line[1024];
-    snprintf(line, sizeof(line), "  %p: %s\n", raw_stack[i], symbol);
-    result += line;
-  }
-
-  return result;
-
-#else  // !GTEST_HAS_ABSL
-  static_cast<void>(max_depth);
-  static_cast<void>(skip_count);
-  return "";
-#endif  // GTEST_HAS_ABSL
-}
-
-void OsStackTraceGetter::UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  void* caller_frame = nullptr;
-  if (absl::GetStackTrace(&caller_frame, 1, 3) <= 0) {
-    caller_frame = nullptr;
-  }
-
-  MutexLock lock(&mutex_);
-  caller_frame_ = caller_frame;
-#endif  // GTEST_HAS_ABSL
-}
-
-// A helper class that creates the premature-exit file in its
-// constructor and deletes the file in its destructor.
-class ScopedPrematureExitFile {
- public:
-  explicit ScopedPrematureExitFile(const char* premature_exit_filepath)
-      : premature_exit_filepath_(premature_exit_filepath ?
-                                 premature_exit_filepath : "") {
-    // If a path to the premature-exit file is specified...
-    if (!premature_exit_filepath_.empty()) {
-      // create the file with a single "0" character in it.  I/O
-      // errors are ignored as there's nothing better we can do and we
-      // don't want to fail the test because of this.
-      FILE* pfile = posix::FOpen(premature_exit_filepath, "w");
-      fwrite("0", 1, 1, pfile);
-      fclose(pfile);
-    }
-  }
-
-  ~ScopedPrematureExitFile() {
-#if !defined GTEST_OS_ESP8266
-    if (!premature_exit_filepath_.empty()) {
-      int retval = remove(premature_exit_filepath_.c_str());
-      if (retval) {
-        GTEST_LOG_(ERROR) << "Failed to remove premature exit filepath \""
-                          << premature_exit_filepath_ << "\" with error "
-                          << retval;
-      }
-    }
-#endif
-  }
-
- private:
-  const std::string premature_exit_filepath_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedPrematureExitFile);
-};
-
-}  // namespace internal
-
-// class TestEventListeners
-
-TestEventListeners::TestEventListeners()
-    : repeater_(new internal::TestEventRepeater()),
-      default_result_printer_(nullptr),
-      default_xml_generator_(nullptr) {}
-
-TestEventListeners::~TestEventListeners() { delete repeater_; }
-
-// Returns the standard listener responsible for the default console
-// output.  Can be removed from the listeners list to shut down default
-// console output.  Note that removing this object from the listener list
-// with Release transfers its ownership to the user.
-void TestEventListeners::Append(TestEventListener* listener) {
-  repeater_->Append(listener);
-}
-
-// Removes the given event listener from the list and returns it.  It then
-// becomes the caller's responsibility to delete the listener. Returns
-// NULL if the listener is not found in the list.
-TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
-  if (listener == default_result_printer_)
-    default_result_printer_ = nullptr;
-  else if (listener == default_xml_generator_)
-    default_xml_generator_ = nullptr;
-  return repeater_->Release(listener);
-}
-
-// Returns repeater that broadcasts the TestEventListener events to all
-// subscribers.
-TestEventListener* TestEventListeners::repeater() { return repeater_; }
-
-// Sets the default_result_printer attribute to the provided listener.
-// The listener is also added to the listener list and previous
-// default_result_printer is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
-  if (default_result_printer_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_result_printer_);
-    default_result_printer_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Sets the default_xml_generator attribute to the provided listener.  The
-// listener is also added to the listener list and previous
-// default_xml_generator is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
-  if (default_xml_generator_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_xml_generator_);
-    default_xml_generator_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Controls whether events will be forwarded by the repeater to the
-// listeners in the list.
-bool TestEventListeners::EventForwardingEnabled() const {
-  return repeater_->forwarding_enabled();
-}
-
-void TestEventListeners::SuppressEventForwarding() {
-  repeater_->set_forwarding_enabled(false);
-}
-
-// class UnitTest
-
-// Gets the singleton UnitTest object.  The first time this method is
-// called, a UnitTest object is constructed and returned.  Consecutive
-// calls will return the same object.
-//
-// We don't protect this under mutex_ as a user is not supposed to
-// call this before main() starts, from which point on the return
-// value will never change.
-UnitTest* UnitTest::GetInstance() {
-  // CodeGear C++Builder insists on a public destructor for the
-  // default implementation.  Use this implementation to keep good OO
-  // design with private destructor.
-
-#if defined(__BORLANDC__)
-  static UnitTest* const instance = new UnitTest;
-  return instance;
-#else
-  static UnitTest instance;
-  return &instance;
-#endif  // defined(__BORLANDC__)
-}
-
-// Gets the number of successful test suites.
-int UnitTest::successful_test_suite_count() const {
-  return impl()->successful_test_suite_count();
-}
-
-// Gets the number of failed test suites.
-int UnitTest::failed_test_suite_count() const {
-  return impl()->failed_test_suite_count();
-}
-
-// Gets the number of all test suites.
-int UnitTest::total_test_suite_count() const {
-  return impl()->total_test_suite_count();
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTest::test_suite_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-int UnitTest::successful_test_case_count() const {
-  return impl()->successful_test_suite_count();
-}
-int UnitTest::failed_test_case_count() const {
-  return impl()->failed_test_suite_count();
-}
-int UnitTest::total_test_case_count() const {
-  return impl()->total_test_suite_count();
-}
-int UnitTest::test_case_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Gets the number of successful tests.
-int UnitTest::successful_test_count() const {
-  return impl()->successful_test_count();
-}
-
-// Gets the number of skipped tests.
-int UnitTest::skipped_test_count() const {
-  return impl()->skipped_test_count();
-}
-
-// Gets the number of failed tests.
-int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTest::reportable_disabled_test_count() const {
-  return impl()->reportable_disabled_test_count();
-}
-
-// Gets the number of disabled tests.
-int UnitTest::disabled_test_count() const {
-  return impl()->disabled_test_count();
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTest::reportable_test_count() const {
-  return impl()->reportable_test_count();
-}
-
-// Gets the number of all tests.
-int UnitTest::total_test_count() const { return impl()->total_test_count(); }
-
-// Gets the number of tests that should run.
-int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }
-
-// Gets the time of the test program start, in ms from the start of the
-// UNIX epoch.
-internal::TimeInMillis UnitTest::start_timestamp() const {
-    return impl()->start_timestamp();
-}
-
-// Gets the elapsed time, in milliseconds.
-internal::TimeInMillis UnitTest::elapsed_time() const {
-  return impl()->elapsed_time();
-}
-
-// Returns true if and only if the unit test passed (i.e. all test suites
-// passed).
-bool UnitTest::Passed() const { return impl()->Passed(); }
-
-// Returns true if and only if the unit test failed (i.e. some test suite
-// failed or something outside of all tests failed).
-bool UnitTest::Failed() const { return impl()->Failed(); }
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-const TestSuite* UnitTest::GetTestSuite(int i) const {
-  return impl()->GetTestSuite(i);
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::GetTestCase(int i) const {
-  return impl()->GetTestCase(i);
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Returns the TestResult containing information on test failures and
-// properties logged outside of individual test suites.
-const TestResult& UnitTest::ad_hoc_test_result() const {
-  return *impl()->ad_hoc_test_result();
-}
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-TestSuite* UnitTest::GetMutableTestSuite(int i) {
-  return impl()->GetMutableSuiteCase(i);
-}
-
-// Returns the list of event listeners that can be used to track events
-// inside Google Test.
-TestEventListeners& UnitTest::listeners() {
-  return *impl()->listeners();
-}
-
-// Registers and returns a global test environment.  When a test
-// program is run, all global test environments will be set-up in the
-// order they were registered.  After all tests in the program have
-// finished, all global test environments will be torn-down in the
-// *reverse* order they were registered.
-//
-// The UnitTest object takes ownership of the given environment.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-Environment* UnitTest::AddEnvironment(Environment* env) {
-  if (env == nullptr) {
-    return nullptr;
-  }
-
-  impl_->environments().push_back(env);
-  return env;
-}
-
-// Adds a TestPartResult to the current TestResult object.  All Google Test
-// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
-// this to report their results.  The user code should use the
-// assertion macros instead of calling this directly.
-void UnitTest::AddTestPartResult(
-    TestPartResult::Type result_type,
-    const char* file_name,
-    int line_number,
-    const std::string& message,
-    const std::string& os_stack_trace) GTEST_LOCK_EXCLUDED_(mutex_) {
-  Message msg;
-  msg << message;
-
-  internal::MutexLock lock(&mutex_);
-  if (impl_->gtest_trace_stack().size() > 0) {
-    msg << "\n" << GTEST_NAME_ << " trace:";
-
-    for (size_t i = impl_->gtest_trace_stack().size(); i > 0; --i) {
-      const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
-      msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
-          << " " << trace.message;
-    }
-  }
-
-  if (os_stack_trace.c_str() != nullptr && !os_stack_trace.empty()) {
-    msg << internal::kStackTraceMarker << os_stack_trace;
-  }
-
-  const TestPartResult result = TestPartResult(
-      result_type, file_name, line_number, msg.GetString().c_str());
-  impl_->GetTestPartResultReporterForCurrentThread()->
-      ReportTestPartResult(result);
-
-  if (result_type != TestPartResult::kSuccess &&
-      result_type != TestPartResult::kSkip) {
-    // gtest_break_on_failure takes precedence over
-    // gtest_throw_on_failure.  This allows a user to set the latter
-    // in the code (perhaps in order to use Google Test assertions
-    // with another testing framework) and specify the former on the
-    // command line for debugging.
-    if (GTEST_FLAG(break_on_failure)) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-      // Using DebugBreak on Windows allows gtest to still break into a debugger
-      // when a failure happens and both the --gtest_break_on_failure and
-      // the --gtest_catch_exceptions flags are specified.
-      DebugBreak();
-#elif (!defined(__native_client__)) &&            \
-    ((defined(__clang__) || defined(__GNUC__)) && \
-     (defined(__x86_64__) || defined(__i386__)))
-      // with clang/gcc we can achieve the same effect on x86 by invoking int3
-      asm("int3");
-#else
-      // Dereference nullptr through a volatile pointer to prevent the compiler
-      // from removing. We use this rather than abort() or __builtin_trap() for
-      // portability: some debuggers don't correctly trap abort().
-      *static_cast<volatile int*>(nullptr) = 1;
-#endif  // GTEST_OS_WINDOWS
-    } else if (GTEST_FLAG(throw_on_failure)) {
-#if GTEST_HAS_EXCEPTIONS
-      throw internal::GoogleTestFailureException(result);
-#else
-      // We cannot call abort() as it generates a pop-up in debug mode
-      // that cannot be suppressed in VC 7.1 or below.
-      exit(1);
-#endif
-    }
-  }
-}
-
-// Adds a TestProperty to the current TestResult object when invoked from
-// inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-// from SetUpTestSuite or TearDownTestSuite, or to the global property set
-// when invoked elsewhere.  If the result already contains a property with
-// the same key, the value will be updated.
-void UnitTest::RecordProperty(const std::string& key,
-                              const std::string& value) {
-  impl_->RecordProperty(TestProperty(key, value));
-}
-
-// Runs all tests in this UnitTest object and prints the result.
-// Returns 0 if successful, or 1 otherwise.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-int UnitTest::Run() {
-  const bool in_death_test_child_process =
-      internal::GTEST_FLAG(internal_run_death_test).length() > 0;
-
-  // Google Test implements this protocol for catching that a test
-  // program exits before returning control to Google Test:
-  //
-  //   1. Upon start, Google Test creates a file whose absolute path
-  //      is specified by the environment variable
-  //      TEST_PREMATURE_EXIT_FILE.
-  //   2. When Google Test has finished its work, it deletes the file.
-  //
-  // This allows a test runner to set TEST_PREMATURE_EXIT_FILE before
-  // running a Google-Test-based test program and check the existence
-  // of the file at the end of the test execution to see if it has
-  // exited prematurely.
-
-  // If we are in the child process of a death test, don't
-  // create/delete the premature exit file, as doing so is unnecessary
-  // and will confuse the parent process.  Otherwise, create/delete
-  // the file upon entering/leaving this function.  If the program
-  // somehow exits before this function has a chance to return, the
-  // premature-exit file will be left undeleted, causing a test runner
-  // that understands the premature-exit-file protocol to report the
-  // test as having failed.
-  const internal::ScopedPrematureExitFile premature_exit_file(
-      in_death_test_child_process
-          ? nullptr
-          : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));
-
-  // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
-  // used for the duration of the program.
-  impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));
-
-#if GTEST_OS_WINDOWS
-  // Either the user wants Google Test to catch exceptions thrown by the
-  // tests or this is executing in the context of death test child
-  // process. In either case the user does not want to see pop-up dialogs
-  // about crashes - they are expected.
-  if (impl()->catch_exceptions() || in_death_test_child_process) {
-# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-    // SetErrorMode doesn't exist on CE.
-    SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
-                 SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-
-# if (defined(_MSC_VER) || GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
-    // Death test children can be terminated with _abort().  On Windows,
-    // _abort() can show a dialog with a warning message.  This forces the
-    // abort message to go to stderr instead.
-    _set_error_mode(_OUT_TO_STDERR);
-# endif
-
-# if defined(_MSC_VER) && !GTEST_OS_WINDOWS_MOBILE
-    // In the debug version, Visual Studio pops up a separate dialog
-    // offering a choice to debug the aborted program. We need to suppress
-    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
-    // executed. Google Test will notify the user of any unexpected
-    // failure via stderr.
-    if (!GTEST_FLAG(break_on_failure))
-      _set_abort_behavior(
-          0x0,                                    // Clear the following flags:
-          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
-
-    // In debug mode, the Windows CRT can crash with an assertion over invalid
-    // input (e.g. passing an invalid file descriptor).  The default handling
-    // for these assertions is to pop up a dialog and wait for user input.
-    // Instead ask the CRT to dump such assertions to stderr non-interactively.
-    if (!IsDebuggerPresent()) {
-      (void)_CrtSetReportMode(_CRT_ASSERT,
-                              _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-      (void)_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
-    }
-# endif
-  }
-#endif  // GTEST_OS_WINDOWS
-
-  return internal::HandleExceptionsInMethodIfSupported(
-      impl(),
-      &internal::UnitTestImpl::RunAllTests,
-      "auxiliary test code (environments or event listeners)") ? 0 : 1;
-}
-
-// Returns the working directory when the first TEST() or TEST_F() was
-// executed.
-const char* UnitTest::original_working_dir() const {
-  return impl_->original_working_dir_.c_str();
-}
-
-// Returns the TestSuite object for the test that's currently running,
-// or NULL if no test is running.
-const TestSuite* UnitTest::current_test_suite() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::current_test_case() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-#endif
-
-// Returns the TestInfo object for the test that's currently running,
-// or NULL if no test is running.
-const TestInfo* UnitTest::current_test_info() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_info();
-}
-
-// Returns the random seed used at the start of the current test run.
-int UnitTest::random_seed() const { return impl_->random_seed(); }
-
-// Returns ParameterizedTestSuiteRegistry object used to keep track of
-// value-parameterized tests and instantiate and register them.
-internal::ParameterizedTestSuiteRegistry&
-UnitTest::parameterized_test_registry() GTEST_LOCK_EXCLUDED_(mutex_) {
-  return impl_->parameterized_test_registry();
-}
-
-// Creates an empty UnitTest.
-UnitTest::UnitTest() {
-  impl_ = new internal::UnitTestImpl(this);
-}
-
-// Destructor of UnitTest.
-UnitTest::~UnitTest() {
-  delete impl_;
-}
-
-// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-// Google Test trace stack.
-void UnitTest::PushGTestTrace(const internal::TraceInfo& trace)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().push_back(trace);
-}
-
-// Pops a trace from the per-thread Google Test trace stack.
-void UnitTest::PopGTestTrace()
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().pop_back();
-}
-
-namespace internal {
-
-UnitTestImpl::UnitTestImpl(UnitTest* parent)
-    : parent_(parent),
-      GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
-          default_global_test_part_result_reporter_(this),
-      default_per_thread_test_part_result_reporter_(this),
-      GTEST_DISABLE_MSC_WARNINGS_POP_() global_test_part_result_repoter_(
-          &default_global_test_part_result_reporter_),
-      per_thread_test_part_result_reporter_(
-          &default_per_thread_test_part_result_reporter_),
-      parameterized_test_registry_(),
-      parameterized_tests_registered_(false),
-      last_death_test_suite_(-1),
-      current_test_suite_(nullptr),
-      current_test_info_(nullptr),
-      ad_hoc_test_result_(),
-      os_stack_trace_getter_(nullptr),
-      post_flag_parse_init_performed_(false),
-      random_seed_(0),  // Will be overridden by the flag before first use.
-      random_(0),       // Will be reseeded before first use.
-      start_timestamp_(0),
-      elapsed_time_(0),
-#if GTEST_HAS_DEATH_TEST
-      death_test_factory_(new DefaultDeathTestFactory),
-#endif
-      // Will be overridden by the flag before first use.
-      catch_exceptions_(false) {
-  listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
-}
-
-UnitTestImpl::~UnitTestImpl() {
-  // Deletes every TestSuite.
-  ForEach(test_suites_, internal::Delete<TestSuite>);
-
-  // Deletes every Environment.
-  ForEach(environments_, internal::Delete<Environment>);
-
-  delete os_stack_trace_getter_;
-}
-
-// Adds a TestProperty to the current TestResult object when invoked in a
-// context of a test, to current test suite's ad_hoc_test_result when invoke
-// from SetUpTestSuite/TearDownTestSuite, or to the global property set
-// otherwise.  If the result already contains a property with the same key,
-// the value will be updated.
-void UnitTestImpl::RecordProperty(const TestProperty& test_property) {
-  std::string xml_element;
-  TestResult* test_result;  // TestResult appropriate for property recording.
-
-  if (current_test_info_ != nullptr) {
-    xml_element = "testcase";
-    test_result = &(current_test_info_->result_);
-  } else if (current_test_suite_ != nullptr) {
-    xml_element = "testsuite";
-    test_result = &(current_test_suite_->ad_hoc_test_result_);
-  } else {
-    xml_element = "testsuites";
-    test_result = &ad_hoc_test_result_;
-  }
-  test_result->RecordProperty(xml_element, test_property);
-}
-
-#if GTEST_HAS_DEATH_TEST
-// Disables event forwarding if the control is currently in a death test
-// subprocess. Must not be called before InitGoogleTest.
-void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
-  if (internal_run_death_test_flag_.get() != nullptr)
-    listeners()->SuppressEventForwarding();
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Initializes event listeners performing XML output as specified by
-// UnitTestOptions. Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureXmlOutput() {
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml") {
-    listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format == "json") {
-    listeners()->SetDefaultXmlGenerator(new JsonUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format != "") {
-    GTEST_LOG_(WARNING) << "WARNING: unrecognized output format \""
-                        << output_format << "\" ignored.";
-  }
-}
-
-#if GTEST_CAN_STREAM_RESULTS_
-// Initializes event listeners for streaming test results in string form.
-// Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureStreamingOutput() {
-  const std::string& target = GTEST_FLAG(stream_result_to);
-  if (!target.empty()) {
-    const size_t pos = target.find(':');
-    if (pos != std::string::npos) {
-      listeners()->Append(new StreamingListener(target.substr(0, pos),
-                                                target.substr(pos+1)));
-    } else {
-      GTEST_LOG_(WARNING) << "unrecognized streaming target \"" << target
-                          << "\" ignored.";
-    }
-  }
-}
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Performs initialization dependent upon flag values obtained in
-// ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-// ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-// this function is also called from RunAllTests.  Since this function can be
-// called more than once, it has to be idempotent.
-void UnitTestImpl::PostFlagParsingInit() {
-  // Ensures that this function does not execute more than once.
-  if (!post_flag_parse_init_performed_) {
-    post_flag_parse_init_performed_ = true;
-
-#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-    // Register to send notifications about key process state changes.
-    listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
-#endif  // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-
-#if GTEST_HAS_DEATH_TEST
-    InitDeathTestSubprocessControlInfo();
-    SuppressTestEventsIfInSubprocess();
-#endif  // GTEST_HAS_DEATH_TEST
-
-    // Registers parameterized tests. This makes parameterized tests
-    // available to the UnitTest reflection API without running
-    // RUN_ALL_TESTS.
-    RegisterParameterizedTests();
-
-    // Configures listeners for XML output. This makes it possible for users
-    // to shut down the default XML output before invoking RUN_ALL_TESTS.
-    ConfigureXmlOutput();
-
-    if (GTEST_FLAG(brief)) {
-      listeners()->SetDefaultResultPrinter(new BriefUnitTestResultPrinter);
-    }
-
-#if GTEST_CAN_STREAM_RESULTS_
-    // Configures listeners for streaming test results to the specified server.
-    ConfigureStreamingOutput();
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-#if GTEST_HAS_ABSL
-    if (GTEST_FLAG(install_failure_signal_handler)) {
-      absl::FailureSignalHandlerOptions options;
-      absl::InstallFailureSignalHandler(options);
-    }
-#endif  // GTEST_HAS_ABSL
-  }
-}
-
-// A predicate that checks the name of a TestSuite against a known
-// value.
-//
-// This is used for implementation of the UnitTest class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestSuiteNameIs is copyable.
-class TestSuiteNameIs {
- public:
-  // Constructor.
-  explicit TestSuiteNameIs(const std::string& name) : name_(name) {}
-
-  // Returns true if and only if the name of test_suite matches name_.
-  bool operator()(const TestSuite* test_suite) const {
-    return test_suite != nullptr &&
-           strcmp(test_suite->name(), name_.c_str()) == 0;
-  }
-
- private:
-  std::string name_;
-};
-
-// Finds and returns a TestSuite with the given name.  If one doesn't
-// exist, creates one and returns it.  It's the CALLER'S
-// RESPONSIBILITY to ensure that this function is only called WHEN THE
-// TESTS ARE NOT SHUFFLED.
-//
-// Arguments:
-//
-//   test_suite_name: name of the test suite
-//   type_param:      the name of the test suite's type parameter, or NULL if
-//                    this is not a typed or a type-parameterized test suite.
-//   set_up_tc:       pointer to the function that sets up the test suite
-//   tear_down_tc:    pointer to the function that tears down the test suite
-TestSuite* UnitTestImpl::GetTestSuite(
-    const char* test_suite_name, const char* type_param,
-    internal::SetUpTestSuiteFunc set_up_tc,
-    internal::TearDownTestSuiteFunc tear_down_tc) {
-  // Can we find a TestSuite with the given name?
-  const auto test_suite =
-      std::find_if(test_suites_.rbegin(), test_suites_.rend(),
-                   TestSuiteNameIs(test_suite_name));
-
-  if (test_suite != test_suites_.rend()) return *test_suite;
-
-  // No.  Let's create one.
-  auto* const new_test_suite =
-      new TestSuite(test_suite_name, type_param, set_up_tc, tear_down_tc);
-
-  // Is this a death test suite?
-  if (internal::UnitTestOptions::MatchesFilter(test_suite_name,
-                                               kDeathTestSuiteFilter)) {
-    // Yes.  Inserts the test suite after the last death test suite
-    // defined so far.  This only works when the test suites haven't
-    // been shuffled.  Otherwise we may end up running a death test
-    // after a non-death test.
-    ++last_death_test_suite_;
-    test_suites_.insert(test_suites_.begin() + last_death_test_suite_,
-                        new_test_suite);
-  } else {
-    // No.  Appends to the end of the list.
-    test_suites_.push_back(new_test_suite);
-  }
-
-  test_suite_indices_.push_back(static_cast<int>(test_suite_indices_.size()));
-  return new_test_suite;
-}
-
-// Helpers for setting up / tearing down the given environment.  They
-// are for use in the ForEach() function.
-static void SetUpEnvironment(Environment* env) { env->SetUp(); }
-static void TearDownEnvironment(Environment* env) { env->TearDown(); }
-
-// Runs all tests in this UnitTest object, prints the result, and
-// returns true if all tests are successful.  If any exception is
-// thrown during a test, the test is considered to be failed, but the
-// rest of the tests will still be run.
-//
-// When parameterized tests are enabled, it expands and registers
-// parameterized tests first in RegisterParameterizedTests().
-// All other functions called from RunAllTests() may safely assume that
-// parameterized tests are ready to be counted and run.
-bool UnitTestImpl::RunAllTests() {
-  // True if and only if Google Test is initialized before RUN_ALL_TESTS() is
-  // called.
-  const bool gtest_is_initialized_before_run_all_tests = GTestIsInitialized();
-
-  // Do not run any test if the --help flag was specified.
-  if (g_help_flag)
-    return true;
-
-  // Repeats the call to the post-flag parsing initialization in case the
-  // user didn't call InitGoogleTest.
-  PostFlagParsingInit();
-
-  // Even if sharding is not on, test runners may want to use the
-  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
-  // protocol.
-  internal::WriteToShardStatusFileIfNeeded();
-
-  // True if and only if we are in a subprocess for running a thread-safe-style
-  // death test.
-  bool in_subprocess_for_death_test = false;
-
-#if GTEST_HAS_DEATH_TEST
-  in_subprocess_for_death_test =
-      (internal_run_death_test_flag_.get() != nullptr);
-# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-  if (in_subprocess_for_death_test) {
-    GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
-  }
-# endif  // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-#endif  // GTEST_HAS_DEATH_TEST
-
-  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
-                                        in_subprocess_for_death_test);
-
-  // Compares the full test names with the filter to decide which
-  // tests to run.
-  const bool has_tests_to_run = FilterTests(should_shard
-                                              ? HONOR_SHARDING_PROTOCOL
-                                              : IGNORE_SHARDING_PROTOCOL) > 0;
-
-  // Lists the tests and exits if the --gtest_list_tests flag was specified.
-  if (GTEST_FLAG(list_tests)) {
-    // This must be called *after* FilterTests() has been called.
-    ListTestsMatchingFilter();
-    return true;
-  }
-
-  random_seed_ = GTEST_FLAG(shuffle) ?
-      GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;
-
-  // True if and only if at least one test has failed.
-  bool failed = false;
-
-  TestEventListener* repeater = listeners()->repeater();
-
-  start_timestamp_ = GetTimeInMillis();
-  repeater->OnTestProgramStart(*parent_);
-
-  // How many times to repeat the tests?  We don't want to repeat them
-  // when we are inside the subprocess of a death test.
-  const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
-  // Repeats forever if the repeat count is negative.
-  const bool gtest_repeat_forever = repeat < 0;
-  for (int i = 0; gtest_repeat_forever || i != repeat; i++) {
-    // We want to preserve failures generated by ad-hoc test
-    // assertions executed before RUN_ALL_TESTS().
-    ClearNonAdHocTestResult();
-
-    Timer timer;
-
-    // Shuffles test suites and tests if requested.
-    if (has_tests_to_run && GTEST_FLAG(shuffle)) {
-      random()->Reseed(static_cast<uint32_t>(random_seed_));
-      // This should be done before calling OnTestIterationStart(),
-      // such that a test event listener can see the actual test order
-      // in the event.
-      ShuffleTests();
-    }
-
-    // Tells the unit test event listeners that the tests are about to start.
-    repeater->OnTestIterationStart(*parent_, i);
-
-    // Runs each test suite if there is at least one test to run.
-    if (has_tests_to_run) {
-      // Sets up all environments beforehand.
-      repeater->OnEnvironmentsSetUpStart(*parent_);
-      ForEach(environments_, SetUpEnvironment);
-      repeater->OnEnvironmentsSetUpEnd(*parent_);
-
-      // Runs the tests only if there was no fatal failure or skip triggered
-      // during global set-up.
-      if (Test::IsSkipped()) {
-        // Emit diagnostics when global set-up calls skip, as it will not be
-        // emitted by default.
-        TestResult& test_result =
-            *internal::GetUnitTestImpl()->current_test_result();
-        for (int j = 0; j < test_result.total_part_count(); ++j) {
-          const TestPartResult& test_part_result =
-              test_result.GetTestPartResult(j);
-          if (test_part_result.type() == TestPartResult::kSkip) {
-            const std::string& result = test_part_result.message();
-            printf("%s\n", result.c_str());
-          }
-        }
-        fflush(stdout);
-      } else if (!Test::HasFatalFailure()) {
-        for (int test_index = 0; test_index < total_test_suite_count();
-             test_index++) {
-          GetMutableSuiteCase(test_index)->Run();
-          if (GTEST_FLAG(fail_fast) &&
-              GetMutableSuiteCase(test_index)->Failed()) {
-            for (int j = test_index + 1; j < total_test_suite_count(); j++) {
-              GetMutableSuiteCase(j)->Skip();
-            }
-            break;
-          }
-        }
-      } else if (Test::HasFatalFailure()) {
-        // If there was a fatal failure during the global setup then we know we
-        // aren't going to run any tests. Explicitly mark all of the tests as
-        // skipped to make this obvious in the output.
-        for (int test_index = 0; test_index < total_test_suite_count();
-             test_index++) {
-          GetMutableSuiteCase(test_index)->Skip();
-        }
-      }
-
-      // Tears down all environments in reverse order afterwards.
-      repeater->OnEnvironmentsTearDownStart(*parent_);
-      std::for_each(environments_.rbegin(), environments_.rend(),
-                    TearDownEnvironment);
-      repeater->OnEnvironmentsTearDownEnd(*parent_);
-    }
-
-    elapsed_time_ = timer.Elapsed();
-
-    // Tells the unit test event listener that the tests have just finished.
-    repeater->OnTestIterationEnd(*parent_, i);
-
-    // Gets the result and clears it.
-    if (!Passed()) {
-      failed = true;
-    }
-
-    // Restores the original test order after the iteration.  This
-    // allows the user to quickly repro a failure that happens in the
-    // N-th iteration without repeating the first (N - 1) iterations.
-    // This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
-    // case the user somehow changes the value of the flag somewhere
-    // (it's always safe to unshuffle the tests).
-    UnshuffleTests();
-
-    if (GTEST_FLAG(shuffle)) {
-      // Picks a new random seed for each iteration.
-      random_seed_ = GetNextRandomSeed(random_seed_);
-    }
-  }
-
-  repeater->OnTestProgramEnd(*parent_);
-
-  if (!gtest_is_initialized_before_run_all_tests) {
-    ColoredPrintf(
-        GTestColor::kRed,
-        "\nIMPORTANT NOTICE - DO NOT IGNORE:\n"
-        "This test program did NOT call " GTEST_INIT_GOOGLE_TEST_NAME_
-        "() before calling RUN_ALL_TESTS(). This is INVALID. Soon " GTEST_NAME_
-        " will start to enforce the valid usage. "
-        "Please fix it ASAP, or IT WILL START TO FAIL.\n");  // NOLINT
-#if GTEST_FOR_GOOGLE_
-    ColoredPrintf(GTestColor::kRed,
-                  "For more details, see http://wiki/Main/ValidGUnitMain.\n");
-#endif  // GTEST_FOR_GOOGLE_
-  }
-
-  return !failed;
-}
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded() {
-  const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
-  if (test_shard_file != nullptr) {
-    FILE* const file = posix::FOpen(test_shard_file, "w");
-    if (file == nullptr) {
-      ColoredPrintf(GTestColor::kRed,
-                    "Could not write to the test shard status file \"%s\" "
-                    "specified by the %s environment variable.\n",
-                    test_shard_file, kTestShardStatusFile);
-      fflush(stdout);
-      exit(EXIT_FAILURE);
-    }
-    fclose(file);
-  }
-}
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (i.e., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-bool ShouldShard(const char* total_shards_env,
-                 const char* shard_index_env,
-                 bool in_subprocess_for_death_test) {
-  if (in_subprocess_for_death_test) {
-    return false;
-  }
-
-  const int32_t total_shards = Int32FromEnvOrDie(total_shards_env, -1);
-  const int32_t shard_index = Int32FromEnvOrDie(shard_index_env, -1);
-
-  if (total_shards == -1 && shard_index == -1) {
-    return false;
-  } else if (total_shards == -1 && shard_index != -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestShardIndex << " = " << shard_index
-      << ", but have left " << kTestTotalShards << " unset.\n";
-    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (total_shards != -1 && shard_index == -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestTotalShards << " = " << total_shards
-      << ", but have left " << kTestShardIndex << " unset.\n";
-    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (shard_index < 0 || shard_index >= total_shards) {
-    const Message msg = Message()
-      << "Invalid environment variables: we require 0 <= "
-      << kTestShardIndex << " < " << kTestTotalShards
-      << ", but you have " << kTestShardIndex << "=" << shard_index
-      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
-    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  }
-
-  return total_shards > 1;
-}
-
-// Parses the environment variable var as an Int32. If it is unset,
-// returns default_val. If it is not an Int32, prints an error
-// and aborts.
-int32_t Int32FromEnvOrDie(const char* var, int32_t default_val) {
-  const char* str_val = posix::GetEnv(var);
-  if (str_val == nullptr) {
-    return default_val;
-  }
-
-  int32_t result;
-  if (!ParseInt32(Message() << "The value of environment variable " << var,
-                  str_val, &result)) {
-    exit(EXIT_FAILURE);
-  }
-  return result;
-}
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
-  return (test_id % total_shards) == shard_index;
-}
-
-// Compares the name of each test with the user-specified filter to
-// decide whether the test should be run, then records the result in
-// each TestSuite and TestInfo object.
-// If shard_tests == true, further filters tests based on sharding
-// variables in the environment - see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md
-// . Returns the number of tests that should run.
-int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
-  const int32_t total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
-  const int32_t shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;
-
-  // num_runnable_tests are the number of tests that will
-  // run across all shards (i.e., match filter and are not disabled).
-  // num_selected_tests are the number of tests to be run on
-  // this shard.
-  int num_runnable_tests = 0;
-  int num_selected_tests = 0;
-  for (auto* test_suite : test_suites_) {
-    const std::string& test_suite_name = test_suite->name();
-    test_suite->set_should_run(false);
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      TestInfo* const test_info = test_suite->test_info_list()[j];
-      const std::string test_name(test_info->name());
-      // A test is disabled if test suite name or test name matches
-      // kDisableTestFilter.
-      const bool is_disabled = internal::UnitTestOptions::MatchesFilter(
-                                   test_suite_name, kDisableTestFilter) ||
-                               internal::UnitTestOptions::MatchesFilter(
-                                   test_name, kDisableTestFilter);
-      test_info->is_disabled_ = is_disabled;
-
-      const bool matches_filter = internal::UnitTestOptions::FilterMatchesTest(
-          test_suite_name, test_name);
-      test_info->matches_filter_ = matches_filter;
-
-      const bool is_runnable =
-          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
-          matches_filter;
-
-      const bool is_in_another_shard =
-          shard_tests != IGNORE_SHARDING_PROTOCOL &&
-          !ShouldRunTestOnShard(total_shards, shard_index, num_runnable_tests);
-      test_info->is_in_another_shard_ = is_in_another_shard;
-      const bool is_selected = is_runnable && !is_in_another_shard;
-
-      num_runnable_tests += is_runnable;
-      num_selected_tests += is_selected;
-
-      test_info->should_run_ = is_selected;
-      test_suite->set_should_run(test_suite->should_run() || is_selected);
-    }
-  }
-  return num_selected_tests;
-}
-
-// Prints the given C-string on a single line by replacing all '\n'
-// characters with string "\\n".  If the output takes more than
-// max_length characters, only prints the first max_length characters
-// and "...".
-static void PrintOnOneLine(const char* str, int max_length) {
-  if (str != nullptr) {
-    for (int i = 0; *str != '\0'; ++str) {
-      if (i >= max_length) {
-        printf("...");
-        break;
-      }
-      if (*str == '\n') {
-        printf("\\n");
-        i += 2;
-      } else {
-        printf("%c", *str);
-        ++i;
-      }
-    }
-  }
-}
-
-// Prints the names of the tests matching the user-specified filter flag.
-void UnitTestImpl::ListTestsMatchingFilter() {
-  // Print at most this many characters for each type/value parameter.
-  const int kMaxParamLength = 250;
-
-  for (auto* test_suite : test_suites_) {
-    bool printed_test_suite_name = false;
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      const TestInfo* const test_info = test_suite->test_info_list()[j];
-      if (test_info->matches_filter_) {
-        if (!printed_test_suite_name) {
-          printed_test_suite_name = true;
-          printf("%s.", test_suite->name());
-          if (test_suite->type_param() != nullptr) {
-            printf("  # %s = ", kTypeParamLabel);
-            // We print the type parameter on a single line to make
-            // the output easy to parse by a program.
-            PrintOnOneLine(test_suite->type_param(), kMaxParamLength);
-          }
-          printf("\n");
-        }
-        printf("  %s", test_info->name());
-        if (test_info->value_param() != nullptr) {
-          printf("  # %s = ", kValueParamLabel);
-          // We print the value parameter on a single line to make the
-          // output easy to parse by a program.
-          PrintOnOneLine(test_info->value_param(), kMaxParamLength);
-        }
-        printf("\n");
-      }
-    }
-  }
-  fflush(stdout);
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml" || output_format == "json") {
-    FILE* fileout = OpenFileForWriting(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str());
-    std::stringstream stream;
-    if (output_format == "xml") {
-      XmlUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintXmlTestsList(&stream, test_suites_);
-    } else if (output_format == "json") {
-      JsonUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintJsonTestList(&stream, test_suites_);
-    }
-    fprintf(fileout, "%s", StringStreamToString(&stream).c_str());
-    fclose(fileout);
-  }
-}
-
-// Sets the OS stack trace getter.
-//
-// Does nothing if the input and the current OS stack trace getter are
-// the same; otherwise, deletes the old getter and makes the input the
-// current getter.
-void UnitTestImpl::set_os_stack_trace_getter(
-    OsStackTraceGetterInterface* getter) {
-  if (os_stack_trace_getter_ != getter) {
-    delete os_stack_trace_getter_;
-    os_stack_trace_getter_ = getter;
-  }
-}
-
-// Returns the current OS stack trace getter if it is not NULL;
-// otherwise, creates an OsStackTraceGetter, makes it the current
-// getter, and returns it.
-OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
-  if (os_stack_trace_getter_ == nullptr) {
-#ifdef GTEST_OS_STACK_TRACE_GETTER_
-    os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
-#else
-    os_stack_trace_getter_ = new OsStackTraceGetter;
-#endif  // GTEST_OS_STACK_TRACE_GETTER_
-  }
-
-  return os_stack_trace_getter_;
-}
-
-// Returns the most specific TestResult currently running.
-TestResult* UnitTestImpl::current_test_result() {
-  if (current_test_info_ != nullptr) {
-    return &current_test_info_->result_;
-  }
-  if (current_test_suite_ != nullptr) {
-    return &current_test_suite_->ad_hoc_test_result_;
-  }
-  return &ad_hoc_test_result_;
-}
-
-// Shuffles all test suites, and the tests within each test suite,
-// making sure that death tests are still run first.
-void UnitTestImpl::ShuffleTests() {
-  // Shuffles the death test suites.
-  ShuffleRange(random(), 0, last_death_test_suite_ + 1, &test_suite_indices_);
-
-  // Shuffles the non-death test suites.
-  ShuffleRange(random(), last_death_test_suite_ + 1,
-               static_cast<int>(test_suites_.size()), &test_suite_indices_);
-
-  // Shuffles the tests inside each test suite.
-  for (auto& test_suite : test_suites_) {
-    test_suite->ShuffleTests(random());
-  }
-}
-
-// Restores the test suites and tests to their order before the first shuffle.
-void UnitTestImpl::UnshuffleTests() {
-  for (size_t i = 0; i < test_suites_.size(); i++) {
-    // Unshuffles the tests in each test suite.
-    test_suites_[i]->UnshuffleTests();
-    // Resets the index of each test suite.
-    test_suite_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-std::string GetCurrentOsStackTraceExceptTop(UnitTest* /*unit_test*/,
-                                            int skip_count) {
-  // We pass skip_count + 1 to skip this wrapper function in addition
-  // to what the user really wants to skip.
-  return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
-}
-
-// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
-// suppress unreachable code warnings.
-namespace {
-class ClassUniqueToAlwaysTrue {};
-}
-
-bool IsTrue(bool condition) { return condition; }
-
-bool AlwaysTrue() {
-#if GTEST_HAS_EXCEPTIONS
-  // This condition is always false so AlwaysTrue() never actually throws,
-  // but it makes the compiler think that it may throw.
-  if (IsTrue(false))
-    throw ClassUniqueToAlwaysTrue();
-#endif  // GTEST_HAS_EXCEPTIONS
-  return true;
-}
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-bool SkipPrefix(const char* prefix, const char** pstr) {
-  const size_t prefix_len = strlen(prefix);
-  if (strncmp(*pstr, prefix, prefix_len) == 0) {
-    *pstr += prefix_len;
-    return true;
-  }
-  return false;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or NULL if the parsing failed.
-static const char* ParseFlagValue(const char* str, const char* flag,
-                                  bool def_optional) {
-  // str and flag must not be NULL.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
-  const std::string flag_str = std::string("--") + GTEST_FLAG_PREFIX_ + flag;
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) {
-    return flag_end;
-  }
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true as long as it does
-// not start with '0', 'f', or 'F'.
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-static bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
-  return true;
-}
-
-// Parses a string for an int32_t flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(Message() << "The value of flag --" << flag,
-                    value_str, value);
-}
-
-// Parses a string for a string flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-template <typename String>
-static bool ParseStringFlag(const char* str, const char* flag, String* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  *value = value_str;
-  return true;
-}
-
-// Determines whether a string has a prefix that Google Test uses for its
-// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
-// If Google Test detects that a command line flag has its prefix but is not
-// recognized, it will print its help message. Flags starting with
-// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
-// internal flags and do not trigger the help message.
-static bool HasGoogleTestFlagPrefix(const char* str) {
-  return (SkipPrefix("--", &str) ||
-          SkipPrefix("-", &str) ||
-          SkipPrefix("/", &str)) &&
-         !SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
-         (SkipPrefix(GTEST_FLAG_PREFIX_, &str) ||
-          SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
-}
-
-// Prints a string containing code-encoded text.  The following escape
-// sequences can be used in the string to control the text color:
-//
-//   @@    prints a single '@' character.
-//   @R    changes the color to red.
-//   @G    changes the color to green.
-//   @Y    changes the color to yellow.
-//   @D    changes to the default terminal text color.
-//
-static void PrintColorEncoded(const char* str) {
-  GTestColor color = GTestColor::kDefault;  // The current color.
-
-  // Conceptually, we split the string into segments divided by escape
-  // sequences.  Then we print one segment at a time.  At the end of
-  // each iteration, the str pointer advances to the beginning of the
-  // next segment.
-  for (;;) {
-    const char* p = strchr(str, '@');
-    if (p == nullptr) {
-      ColoredPrintf(color, "%s", str);
-      return;
-    }
-
-    ColoredPrintf(color, "%s", std::string(str, p).c_str());
-
-    const char ch = p[1];
-    str = p + 2;
-    if (ch == '@') {
-      ColoredPrintf(color, "@");
-    } else if (ch == 'D') {
-      color = GTestColor::kDefault;
-    } else if (ch == 'R') {
-      color = GTestColor::kRed;
-    } else if (ch == 'G') {
-      color = GTestColor::kGreen;
-    } else if (ch == 'Y') {
-      color = GTestColor::kYellow;
-    } else {
-      --str;
-    }
-  }
-}
-
-static const char kColorEncodedHelpMessage[] =
-    "This program contains tests written using " GTEST_NAME_
-    ". You can use the\n"
-    "following command line flags to control its behavior:\n"
-    "\n"
-    "Test Selection:\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "list_tests@D\n"
-    "      List the names of all tests instead of running them. The name of\n"
-    "      TEST(Foo, Bar) is \"Foo.Bar\".\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "filter=@YPOSITIVE_PATTERNS"
-    "[@G-@YNEGATIVE_PATTERNS]@D\n"
-    "      Run only the tests whose name matches one of the positive patterns "
-    "but\n"
-    "      none of the negative patterns. '?' matches any single character; "
-    "'*'\n"
-    "      matches any substring; ':' separates two patterns.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "also_run_disabled_tests@D\n"
-    "      Run all disabled tests too.\n"
-    "\n"
-    "Test Execution:\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "repeat=@Y[COUNT]@D\n"
-    "      Run the tests repeatedly; use a negative count to repeat forever.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "shuffle@D\n"
-    "      Randomize tests' orders on every iteration.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "random_seed=@Y[NUMBER]@D\n"
-    "      Random number seed to use for shuffling test orders (between 1 and\n"
-    "      99999, or 0 to use a seed based on the current time).\n"
-    "\n"
-    "Test Output:\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
-    "      Enable/disable colored output. The default is @Gauto@D.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "brief=1@D\n"
-    "      Only print test failures.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "print_time=0@D\n"
-    "      Don't print the elapsed time of each test.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "output=@Y(@Gjson@Y|@Gxml@Y)[@G:@YDIRECTORY_PATH@G" GTEST_PATH_SEP_
-    "@Y|@G:@YFILE_PATH]@D\n"
-    "      Generate a JSON or XML report in the given directory or with the "
-    "given\n"
-    "      file name. @YFILE_PATH@D defaults to @Gtest_detail.xml@D.\n"
-# if GTEST_CAN_STREAM_RESULTS_
-    "  @G--" GTEST_FLAG_PREFIX_
-    "stream_result_to=@YHOST@G:@YPORT@D\n"
-    "      Stream test results to the given server.\n"
-# endif  // GTEST_CAN_STREAM_RESULTS_
-    "\n"
-    "Assertion Behavior:\n"
-# if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-    "  @G--" GTEST_FLAG_PREFIX_
-    "death_test_style=@Y(@Gfast@Y|@Gthreadsafe@Y)@D\n"
-    "      Set the default death test style.\n"
-# endif  // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-    "  @G--" GTEST_FLAG_PREFIX_
-    "break_on_failure@D\n"
-    "      Turn assertion failures into debugger break-points.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "throw_on_failure@D\n"
-    "      Turn assertion failures into C++ exceptions for use by an external\n"
-    "      test framework.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "catch_exceptions=0@D\n"
-    "      Do not report exceptions as test failures. Instead, allow them\n"
-    "      to crash the program or throw a pop-up (on Windows).\n"
-    "\n"
-    "Except for @G--" GTEST_FLAG_PREFIX_
-    "list_tests@D, you can alternatively set "
-    "the corresponding\n"
-    "environment variable of a flag (all letters in upper-case). For example, "
-    "to\n"
-    "disable colored text output, you can either specify "
-    "@G--" GTEST_FLAG_PREFIX_
-    "color=no@D or set\n"
-    "the @G" GTEST_FLAG_PREFIX_UPPER_
-    "COLOR@D environment variable to @Gno@D.\n"
-    "\n"
-    "For more information, please read the " GTEST_NAME_
-    " documentation at\n"
-    "@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_
-    "\n"
-    "(not one in your own code or tests), please report it to\n"
-    "@G<" GTEST_DEV_EMAIL_ ">@D.\n";
-
-static bool ParseGoogleTestFlag(const char* const arg) {
-  return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
-                       &GTEST_FLAG(also_run_disabled_tests)) ||
-         ParseBoolFlag(arg, kBreakOnFailureFlag,
-                       &GTEST_FLAG(break_on_failure)) ||
-         ParseBoolFlag(arg, kCatchExceptionsFlag,
-                       &GTEST_FLAG(catch_exceptions)) ||
-         ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
-         ParseStringFlag(arg, kDeathTestStyleFlag,
-                         &GTEST_FLAG(death_test_style)) ||
-         ParseBoolFlag(arg, kDeathTestUseFork,
-                       &GTEST_FLAG(death_test_use_fork)) ||
-         ParseBoolFlag(arg, kFailFast, &GTEST_FLAG(fail_fast)) ||
-         ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
-         ParseStringFlag(arg, kInternalRunDeathTestFlag,
-                         &GTEST_FLAG(internal_run_death_test)) ||
-         ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
-         ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
-         ParseBoolFlag(arg, kBriefFlag, &GTEST_FLAG(brief)) ||
-         ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
-         ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
-         ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
-         ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
-         ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
-         ParseInt32Flag(arg, kStackTraceDepthFlag,
-                        &GTEST_FLAG(stack_trace_depth)) ||
-         ParseStringFlag(arg, kStreamResultToFlag,
-                         &GTEST_FLAG(stream_result_to)) ||
-         ParseBoolFlag(arg, kThrowOnFailureFlag, &GTEST_FLAG(throw_on_failure));
-}
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-static void LoadFlagsFromFile(const std::string& path) {
-  FILE* flagfile = posix::FOpen(path.c_str(), "r");
-  if (!flagfile) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << GTEST_FLAG(flagfile)
-                      << "\"";
-  }
-  std::string contents(ReadEntireFile(flagfile));
-  posix::FClose(flagfile);
-  std::vector<std::string> lines;
-  SplitString(contents, '\n', &lines);
-  for (size_t i = 0; i < lines.size(); ++i) {
-    if (lines[i].empty())
-      continue;
-    if (!ParseGoogleTestFlag(lines[i].c_str()))
-      g_help_flag = true;
-  }
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.  The type parameter CharType can be
-// instantiated to either char or wchar_t.
-template <typename CharType>
-void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
-  for (int i = 1; i < *argc; i++) {
-    const std::string arg_string = StreamableToString(argv[i]);
-    const char* const arg = arg_string.c_str();
-
-    using internal::ParseBoolFlag;
-    using internal::ParseInt32Flag;
-    using internal::ParseStringFlag;
-
-    bool remove_flag = false;
-    if (ParseGoogleTestFlag(arg)) {
-      remove_flag = true;
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
-      LoadFlagsFromFile(GTEST_FLAG(flagfile));
-      remove_flag = true;
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (arg_string == "--help" || arg_string == "-h" ||
-               arg_string == "-?" || arg_string == "/?" ||
-               HasGoogleTestFlagPrefix(arg)) {
-      // Both help flag and unrecognized Google Test flags (excluding
-      // internal ones) trigger help display.
-      g_help_flag = true;
-    }
-
-    if (remove_flag) {
-      // Shift the remainder of the argv list left by one.  Note
-      // that argv has (*argc + 1) elements, the last one always being
-      // NULL.  The following loop moves the trailing NULL element as
-      // well.
-      for (int j = i; j != *argc; j++) {
-        argv[j] = argv[j + 1];
-      }
-
-      // Decrements the argument count.
-      (*argc)--;
-
-      // We also need to decrement the iterator as we just removed
-      // an element.
-      i--;
-    }
-  }
-
-  if (g_help_flag) {
-    // We print the help here instead of in RUN_ALL_TESTS(), as the
-    // latter may not be called at all if the user is using Google
-    // Test with another testing framework.
-    PrintColorEncoded(kColorEncodedHelpMessage);
-  }
-}
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-
-  // Fix the value of *_NSGetArgc() on macOS, but if and only if
-  // *_NSGetArgv() == argv
-  // Only applicable to char** version of argv
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-  if (*_NSGetArgv() == argv) {
-    *_NSGetArgc() = *argc;
-  }
-#endif
-#endif
-}
-void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-}
-
-// The internal implementation of InitGoogleTest().
-//
-// The type parameter CharType can be instantiated to either char or
-// wchar_t.
-template <typename CharType>
-void InitGoogleTestImpl(int* argc, CharType** argv) {
-  // We don't want to run the initialization code twice.
-  if (GTestIsInitialized()) return;
-
-  if (*argc <= 0) return;
-
-  g_argvs.clear();
-  for (int i = 0; i != *argc; i++) {
-    g_argvs.push_back(StreamableToString(argv[i]));
-  }
-
-#if GTEST_HAS_ABSL
-  absl::InitializeSymbolizer(g_argvs[0].c_str());
-#endif  // GTEST_HAS_ABSL
-
-  ParseGoogleTestFlagsOnly(argc, argv);
-  GetUnitTestImpl()->PostFlagParsingInit();
-}
-
-}  // namespace internal
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-void InitGoogleTest(int* argc, char** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-void InitGoogleTest(int* argc, wchar_t** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-void InitGoogleTest() {
-  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
-  int argc = 1;
-  const auto arg0 = "dummy";
-  char* argv0 = const_cast<char*>(arg0);
-  char** argv = &argv0;
-
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(&argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(&argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-std::string TempDir() {
-#if defined(GTEST_CUSTOM_TEMPDIR_FUNCTION_)
-  return GTEST_CUSTOM_TEMPDIR_FUNCTION_();
-#elif GTEST_OS_WINDOWS_MOBILE
-  return "\\temp\\";
-#elif GTEST_OS_WINDOWS
-  const char* temp_dir = internal::posix::GetEnv("TEMP");
-  if (temp_dir == nullptr || temp_dir[0] == '\0') {
-    return "\\temp\\";
-  } else if (temp_dir[strlen(temp_dir) - 1] == '\\') {
-    return temp_dir;
-  } else {
-    return std::string(temp_dir) + "\\";
-  }
-#elif GTEST_OS_LINUX_ANDROID
-  const char* temp_dir = internal::posix::GetEnv("TEST_TMPDIR");
-  if (temp_dir == nullptr || temp_dir[0] == '\0') {
-    return "/data/local/tmp/";
-  } else {
-    return temp_dir;
-  }
-#elif GTEST_OS_LINUX
-  const char* temp_dir = internal::posix::GetEnv("TEST_TMPDIR");
-  if (temp_dir == nullptr || temp_dir[0] == '\0') {
-    return "/tmp/";
-  } else {
-    return temp_dir;
-  }
-#else
-  return "/tmp/";
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Class ScopedTrace
-
-// Pushes the given source file location and message onto a per-thread
-// trace stack maintained by Google Test.
-void ScopedTrace::PushTrace(const char* file, int line, std::string message) {
-  internal::TraceInfo trace;
-  trace.file = file;
-  trace.line = line;
-  trace.message.swap(message);
-
-  UnitTest::GetInstance()->PushGTestTrace(trace);
-}
-
-// Pops the info pushed by the c'tor.
-ScopedTrace::~ScopedTrace()
-    GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
-  UnitTest::GetInstance()->PopGTestTrace();
-}
-
-}  // namespace testing
diff --git a/third_party/googletest/googletest/src/gtest_main.cc b/third_party/googletest/googletest/src/gtest_main.cc
deleted file mode 100644
index 46b27c3..0000000
--- a/third_party/googletest/googletest/src/gtest_main.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <cstdio>
-#include "gtest/gtest.h"
-
-#if GTEST_OS_ESP8266 || GTEST_OS_ESP32
-#if GTEST_OS_ESP8266
-extern "C" {
-#endif
-void setup() {
-  testing::InitGoogleTest();
-}
-
-void loop() { RUN_ALL_TESTS(); }
-
-#if GTEST_OS_ESP8266
-}
-#endif
-
-#else
-
-GTEST_API_ int main(int argc, char **argv) {
-  printf("Running main() from %s\n", __FILE__);
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif
diff --git a/third_party/googletest/googletest/test/BUILD.bazel b/third_party/googletest/googletest/test/BUILD.bazel
deleted file mode 100644
index 95a5fef..0000000
--- a/third_party/googletest/googletest/test/BUILD.bazel
+++ /dev/null
@@ -1,597 +0,0 @@
-# Copyright 2017 Google Inc.
-# All Rights Reserved.
-#
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Bazel BUILD for The Google C++ Testing Framework (Google Test)
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_test")
-load("@rules_python//python:defs.bzl", "py_library", "py_test")
-
-licenses(["notice"])
-
-package(default_visibility = ["//:__subpackages__"])
-
-#on windows exclude gtest-tuple.h
-cc_test(
-    name = "gtest_all_test",
-    size = "small",
-    srcs = glob(
-        include = [
-            "gtest-*.cc",
-            "googletest-*.cc",
-            "*.h",
-            "googletest/include/gtest/**/*.h",
-        ],
-        exclude = [
-            "gtest-unittest-api_test.cc",
-            "googletest/src/gtest-all.cc",
-            "gtest_all_test.cc",
-            "gtest-death-test_ex_test.cc",
-            "gtest-listener_test.cc",
-            "gtest-unittest-api_test.cc",
-            "googletest-param-test-test.cc",
-            "googletest-param-test2-test.cc",
-            "googletest-catch-exceptions-test_.cc",
-            "googletest-color-test_.cc",
-            "googletest-env-var-test_.cc",
-            "googletest-failfast-unittest_.cc",
-            "googletest-filter-unittest_.cc",
-            "googletest-global-environment-unittest_.cc",
-            "googletest-break-on-failure-unittest_.cc",
-            "googletest-listener-test.cc",
-            "googletest-output-test_.cc",
-            "googletest-list-tests-unittest_.cc",
-            "googletest-shuffle-test_.cc",
-            "googletest-setuptestsuite-test_.cc",
-            "googletest-uninitialized-test_.cc",
-            "googletest-death-test_ex_test.cc",
-            "googletest-param-test-test",
-            "googletest-throw-on-failure-test_.cc",
-            "googletest-param-test-invalid-name1-test_.cc",
-            "googletest-param-test-invalid-name2-test_.cc",
-        ],
-    ) + select({
-        "//:windows": [],
-        "//conditions:default": [],
-    }),
-    copts = select({
-        "//:windows": ["-DGTEST_USE_OWN_TR1_TUPLE=0"],
-        "//conditions:default": ["-DGTEST_USE_OWN_TR1_TUPLE=1"],
-    }) + select({
-        # Ensure MSVC treats source files as UTF-8 encoded.
-        "//:msvc_compiler": ["-utf-8"],
-        "//conditions:default": [],
-    }),
-    includes = [
-        "googletest",
-        "googletest/include",
-        "googletest/include/internal",
-        "googletest/test",
-    ],
-    linkopts = select({
-        "//:windows": [],
-        "//conditions:default": [],
-    }),
-    deps = ["//:gtest_main"],
-)
-
-# Tests death tests.
-cc_test(
-    name = "googletest-death-test-test",
-    size = "medium",
-    srcs = ["googletest-death-test-test.cc"],
-    copts = [
-        "-Wno-empty-body",
-        "-Wno-dangling-else",
-    ],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest_test_macro_stack_footprint_test",
-    size = "small",
-    srcs = ["gtest_test_macro_stack_footprint_test.cc"],
-    deps = ["//:gtest"],
-)
-
-#These googletest tests have their own main()
-cc_test(
-    name = "googletest-listener-test",
-    size = "small",
-    srcs = ["googletest-listener-test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest-unittest-api_test",
-    size = "small",
-    srcs = [
-        "gtest-unittest-api_test.cc",
-    ],
-    deps = [
-        "//:gtest",
-    ],
-)
-
-cc_test(
-    name = "googletest-param-test-test",
-    size = "small",
-    srcs = [
-        "googletest-param-test-test.cc",
-        "googletest-param-test-test.h",
-        "googletest-param-test2-test.cc",
-    ],
-    copts = [
-        "-Wno-unused-private-field",
-    ],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_unittest",
-    size = "small",
-    srcs = ["gtest_unittest.cc"],
-    shard_count = 2,
-    deps = ["//:gtest_main"],
-)
-
-#  Py tests
-
-py_library(
-    name = "gtest_test_utils",
-    testonly = 1,
-    srcs = ["gtest_test_utils.py"],
-    imports = ["."],
-)
-
-cc_binary(
-    name = "gtest_help_test_",
-    testonly = 1,
-    srcs = ["gtest_help_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_help_test",
-    size = "small",
-    srcs = ["gtest_help_test.py"],
-    data = [":gtest_help_test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-output-test_",
-    testonly = 1,
-    srcs = ["googletest-output-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-output-test",
-    size = "small",
-    srcs = ["googletest-output-test.py"],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        "googletest-output-test-golden-lin.txt",
-        ":googletest-output-test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-color-test_",
-    testonly = 1,
-    srcs = ["googletest-color-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-color-test",
-    size = "small",
-    srcs = ["googletest-color-test.py"],
-    data = [":googletest-color-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-env-var-test_",
-    testonly = 1,
-    srcs = ["googletest-env-var-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-env-var-test",
-    size = "medium",
-    srcs = ["googletest-env-var-test.py"],
-    data = [":googletest-env-var-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-failfast-unittest_",
-    testonly = 1,
-    srcs = ["googletest-failfast-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-failfast-unittest",
-    size = "medium",
-    srcs = ["googletest-failfast-unittest.py"],
-    data = [":googletest-failfast-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-filter-unittest_",
-    testonly = 1,
-    srcs = ["googletest-filter-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-filter-unittest",
-    size = "medium",
-    srcs = ["googletest-filter-unittest.py"],
-    data = [":googletest-filter-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-global-environment-unittest_",
-    testonly = 1,
-    srcs = ["googletest-global-environment-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-global-environment-unittest",
-    size = "medium",
-    srcs = ["googletest-global-environment-unittest.py"],
-    data = [":googletest-global-environment-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-break-on-failure-unittest_",
-    testonly = 1,
-    srcs = ["googletest-break-on-failure-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-break-on-failure-unittest",
-    size = "small",
-    srcs = ["googletest-break-on-failure-unittest.py"],
-    data = [":googletest-break-on-failure-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_test(
-    name = "gtest_assert_by_exception_test",
-    size = "small",
-    srcs = ["gtest_assert_by_exception_test.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-throw-on-failure-test_",
-    testonly = 1,
-    srcs = ["googletest-throw-on-failure-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-throw-on-failure-test",
-    size = "small",
-    srcs = ["googletest-throw-on-failure-test.py"],
-    data = [":googletest-throw-on-failure-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-list-tests-unittest_",
-    testonly = 1,
-    srcs = ["googletest-list-tests-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_skip_test",
-    size = "small",
-    srcs = ["gtest_skip_test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest_skip_in_environment_setup_test",
-    size = "small",
-    srcs = ["gtest_skip_in_environment_setup_test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_skip_check_output_test",
-    size = "small",
-    srcs = ["gtest_skip_check_output_test.py"],
-    data = [":gtest_skip_test"],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "gtest_skip_environment_check_output_test",
-    size = "small",
-    srcs = ["gtest_skip_environment_check_output_test.py"],
-    data = [
-        ":gtest_skip_in_environment_setup_test",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-list-tests-unittest",
-    size = "small",
-    srcs = ["googletest-list-tests-unittest.py"],
-    data = [":googletest-list-tests-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-shuffle-test_",
-    srcs = ["googletest-shuffle-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-shuffle-test",
-    size = "small",
-    srcs = ["googletest-shuffle-test.py"],
-    data = [":googletest-shuffle-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-catch-exceptions-no-ex-test_",
-    testonly = 1,
-    srcs = ["googletest-catch-exceptions-test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "googletest-catch-exceptions-ex-test_",
-    testonly = 1,
-    srcs = ["googletest-catch-exceptions-test_.cc"],
-    copts = ["-fexceptions"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "googletest-catch-exceptions-test",
-    size = "small",
-    srcs = ["googletest-catch-exceptions-test.py"],
-    data = [
-        ":googletest-catch-exceptions-ex-test_",
-        ":googletest-catch-exceptions-no-ex-test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_xml_output_unittest_",
-    testonly = 1,
-    srcs = ["gtest_xml_output_unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_no_test_unittest",
-    size = "small",
-    srcs = ["gtest_no_test_unittest.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "gtest_xml_output_unittest",
-    size = "small",
-    srcs = [
-        "gtest_xml_output_unittest.py",
-        "gtest_xml_test_utils.py",
-    ],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        # We invoke gtest_no_test_unittest to verify the XML output
-        # when the test program contains no test definition.
-        ":gtest_no_test_unittest",
-        ":gtest_xml_output_unittest_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_xml_outfile1_test_",
-    testonly = 1,
-    srcs = ["gtest_xml_outfile1_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "gtest_xml_outfile2_test_",
-    testonly = 1,
-    srcs = ["gtest_xml_outfile2_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_xml_outfiles_test",
-    size = "small",
-    srcs = [
-        "gtest_xml_outfiles_test.py",
-        "gtest_xml_test_utils.py",
-    ],
-    data = [
-        ":gtest_xml_outfile1_test_",
-        ":gtest_xml_outfile2_test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-setuptestsuite-test_",
-    testonly = 1,
-    srcs = ["googletest-setuptestsuite-test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "googletest-setuptestsuite-test",
-    size = "medium",
-    srcs = ["googletest-setuptestsuite-test.py"],
-    data = [":googletest-setuptestsuite-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-uninitialized-test_",
-    testonly = 1,
-    srcs = ["googletest-uninitialized-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-uninitialized-test",
-    size = "medium",
-    srcs = ["googletest-uninitialized-test.py"],
-    data = ["googletest-uninitialized-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_testbridge_test_",
-    testonly = 1,
-    srcs = ["gtest_testbridge_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-# Tests that filtering via testbridge works
-py_test(
-    name = "gtest_testbridge_test",
-    size = "small",
-    srcs = ["gtest_testbridge_test.py"],
-    data = [":gtest_testbridge_test_"],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-json-outfiles-test",
-    size = "small",
-    srcs = [
-        "googletest-json-outfiles-test.py",
-        "gtest_json_test_utils.py",
-    ],
-    data = [
-        ":gtest_xml_outfile1_test_",
-        ":gtest_xml_outfile2_test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-json-output-unittest",
-    size = "medium",
-    srcs = [
-        "googletest-json-output-unittest.py",
-        "gtest_json_test_utils.py",
-    ],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        # We invoke gtest_no_test_unittest to verify the JSON output
-        # when the test program contains no test definition.
-        ":gtest_no_test_unittest",
-        ":gtest_xml_output_unittest_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-# Verifies interaction of death tests and exceptions.
-cc_test(
-    name = "googletest-death-test_ex_catch_test",
-    size = "medium",
-    srcs = ["googletest-death-test_ex_test.cc"],
-    copts = ["-fexceptions"],
-    defines = ["GTEST_ENABLE_CATCH_EXCEPTIONS_=1"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-param-test-invalid-name1-test_",
-    testonly = 1,
-    srcs = ["googletest-param-test-invalid-name1-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-param-test-invalid-name2-test_",
-    testonly = 1,
-    srcs = ["googletest-param-test-invalid-name2-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-param-test-invalid-name1-test",
-    size = "small",
-    srcs = ["googletest-param-test-invalid-name1-test.py"],
-    data = [":googletest-param-test-invalid-name1-test_"],
-    tags = [
-        "no_test_msvc2015",
-        "no_test_msvc2017",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-param-test-invalid-name2-test",
-    size = "small",
-    srcs = ["googletest-param-test-invalid-name2-test.py"],
-    data = [":googletest-param-test-invalid-name2-test_"],
-    tags = [
-        "no_test_msvc2015",
-        "no_test_msvc2017",
-    ],
-    deps = [":gtest_test_utils"],
-)
diff --git a/third_party/googletest/googletest/test/googletest-break-on-failure-unittest.py b/third_party/googletest/googletest/test/googletest-break-on-failure-unittest.py
deleted file mode 100755
index a5dfbc6..0000000
--- a/third_party/googletest/googletest/test/googletest-break-on-failure-unittest.py
+++ /dev/null
@@ -1,208 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test's break-on-failure mode.
-
-A user can ask Google Test to seg-fault when an assertion fails, using
-either the GTEST_BREAK_ON_FAILURE environment variable or the
---gtest_break_on_failure flag.  This script tests such functionality
-by invoking googletest-break-on-failure-unittest_ (a program written with
-Google Test) with different environments and command line flags.
-"""
-
-import os
-import gtest_test_utils
-
-# Constants.
-
-IS_WINDOWS = os.name == 'nt'
-
-# The environment variable for enabling/disabling the break-on-failure mode.
-BREAK_ON_FAILURE_ENV_VAR = 'GTEST_BREAK_ON_FAILURE'
-
-# The command line flag for enabling/disabling the break-on-failure mode.
-BREAK_ON_FAILURE_FLAG = 'gtest_break_on_failure'
-
-# The environment variable for enabling/disabling the throw-on-failure mode.
-THROW_ON_FAILURE_ENV_VAR = 'GTEST_THROW_ON_FAILURE'
-
-# The environment variable for enabling/disabling the catch-exceptions mode.
-CATCH_EXCEPTIONS_ENV_VAR = 'GTEST_CATCH_EXCEPTIONS'
-
-# Path to the googletest-break-on-failure-unittest_ program.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-break-on-failure-unittest_')
-
-
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-
-def Run(command):
-  """Runs a command; returns 1 if it was killed by a signal, or 0 otherwise."""
-
-  p = gtest_test_utils.Subprocess(command, env=environ)
-  if p.terminated_by_signal:
-    return 1
-  else:
-    return 0
-
-
-# The tests.
-
-
-class GTestBreakOnFailureUnitTest(gtest_test_utils.TestCase):
-  """Tests using the GTEST_BREAK_ON_FAILURE environment variable or
-  the --gtest_break_on_failure flag to turn assertion failures into
-  segmentation faults.
-  """
-
-  def RunAndVerify(self, env_var_value, flag_value, expect_seg_fault):
-    """Runs googletest-break-on-failure-unittest_ and verifies that it does
-    (or does not) have a seg-fault.
-
-    Args:
-      env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
-                        variable; None if the variable should be unset.
-      flag_value:       value of the --gtest_break_on_failure flag;
-                        None if the flag should not be present.
-      expect_seg_fault: 1 if the program is expected to generate a seg-fault;
-                        0 otherwise.
-    """
-
-    SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, env_var_value)
-
-    if env_var_value is None:
-      env_var_value_msg = ' is not set'
-    else:
-      env_var_value_msg = '=' + env_var_value
-
-    if flag_value is None:
-      flag = ''
-    elif flag_value == '0':
-      flag = '--%s=0' % BREAK_ON_FAILURE_FLAG
-    else:
-      flag = '--%s' % BREAK_ON_FAILURE_FLAG
-
-    command = [EXE_PATH]
-    if flag:
-      command.append(flag)
-
-    if expect_seg_fault:
-      should_or_not = 'should'
-    else:
-      should_or_not = 'should not'
-
-    has_seg_fault = Run(command)
-
-    SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, None)
-
-    msg = ('when %s%s, an assertion failure in "%s" %s cause a seg-fault.' %
-           (BREAK_ON_FAILURE_ENV_VAR, env_var_value_msg, ' '.join(command),
-            should_or_not))
-    self.assert_(has_seg_fault == expect_seg_fault, msg)
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value=None,
-                      expect_seg_fault=0)
-
-  def testEnvVar(self):
-    """Tests using the GTEST_BREAK_ON_FAILURE environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value=None,
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value=None,
-                      expect_seg_fault=1)
-
-  def testFlag(self):
-    """Tests using the --gtest_break_on_failure flag."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='1',
-                      expect_seg_fault=1)
-
-  def testFlagOverridesEnvVar(self):
-    """Tests that the flag overrides the environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='1',
-                      expect_seg_fault=1)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='1',
-                      expect_seg_fault=1)
-
-  def testBreakOnFailureOverridesThrowOnFailure(self):
-    """Tests that gtest_break_on_failure overrides gtest_throw_on_failure."""
-
-    SetEnvVar(THROW_ON_FAILURE_ENV_VAR, '1')
-    try:
-      self.RunAndVerify(env_var_value=None,
-                        flag_value='1',
-                        expect_seg_fault=1)
-    finally:
-      SetEnvVar(THROW_ON_FAILURE_ENV_VAR, None)
-
-  if IS_WINDOWS:
-    def testCatchExceptionsDoesNotInterfere(self):
-      """Tests that gtest_catch_exceptions doesn't interfere."""
-
-      SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, '1')
-      try:
-        self.RunAndVerify(env_var_value='1',
-                          flag_value='1',
-                          expect_seg_fault=1)
-      finally:
-        SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, None)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-break-on-failure-unittest_.cc b/third_party/googletest/googletest/test/googletest-break-on-failure-unittest_.cc
deleted file mode 100644
index f84957a..0000000
--- a/third_party/googletest/googletest/test/googletest-break-on-failure-unittest_.cc
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test's break-on-failure mode.
-//
-// A user can ask Google Test to seg-fault when an assertion fails, using
-// either the GTEST_BREAK_ON_FAILURE environment variable or the
-// --gtest_break_on_failure flag.  This file is used for testing such
-// functionality.
-//
-// This program will be invoked from a Python unit test.  It is
-// expected to fail.  Don't run it directly.
-
-#include "gtest/gtest.h"
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <stdlib.h>
-#endif
-
-namespace {
-
-// A test that's expected to fail.
-TEST(Foo, Bar) {
-  EXPECT_EQ(2, 3);
-}
-
-#if GTEST_HAS_SEH && !GTEST_OS_WINDOWS_MOBILE
-// On Windows Mobile global exception handlers are not supported.
-LONG WINAPI ExitWithExceptionCode(
-    struct _EXCEPTION_POINTERS* exception_pointers) {
-  exit(exception_pointers->ExceptionRecord->ExceptionCode);
-}
-#endif
-
-}  // namespace
-
-int main(int argc, char **argv) {
-#if GTEST_OS_WINDOWS
-  // Suppresses display of the Windows error dialog upon encountering
-  // a general protection fault (segment violation).
-  SetErrorMode(SEM_NOGPFAULTERRORBOX | SEM_FAILCRITICALERRORS);
-
-# if GTEST_HAS_SEH && !GTEST_OS_WINDOWS_MOBILE
-
-  // The default unhandled exception filter does not always exit
-  // with the exception code as exit code - for example it exits with
-  // 0 for EXCEPTION_ACCESS_VIOLATION and 1 for EXCEPTION_BREAKPOINT
-  // if the application is compiled in debug mode. Thus we use our own
-  // filter which always exits with the exception code for unhandled
-  // exceptions.
-  SetUnhandledExceptionFilter(ExitWithExceptionCode);
-
-# endif
-#endif  // GTEST_OS_WINDOWS
-  testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-catch-exceptions-test.py b/third_party/googletest/googletest/test/googletest-catch-exceptions-test.py
deleted file mode 100755
index 94a5b33..0000000
--- a/third_party/googletest/googletest/test/googletest-catch-exceptions-test.py
+++ /dev/null
@@ -1,236 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2010 Google Inc.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests Google Test's exception catching behavior.
-
-This script invokes googletest-catch-exceptions-test_ and
-googletest-catch-exceptions-ex-test_ (programs written with
-Google Test) and verifies their output.
-"""
-
-import gtest_test_utils
-
-# Constants.
-FLAG_PREFIX = '--gtest_'
-LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
-NO_CATCH_EXCEPTIONS_FLAG = FLAG_PREFIX + 'catch_exceptions=0'
-FILTER_FLAG = FLAG_PREFIX + 'filter'
-
-# Path to the googletest-catch-exceptions-ex-test_ binary, compiled with
-# exceptions enabled.
-EX_EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-catch-exceptions-ex-test_')
-
-# Path to the googletest-catch-exceptions-test_ binary, compiled with
-# exceptions disabled.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-catch-exceptions-no-ex-test_')
-
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-TEST_LIST = gtest_test_utils.Subprocess(
-    [EXE_PATH, LIST_TESTS_FLAG], env=environ).output
-
-SUPPORTS_SEH_EXCEPTIONS = 'ThrowsSehException' in TEST_LIST
-
-if SUPPORTS_SEH_EXCEPTIONS:
-  BINARY_OUTPUT = gtest_test_utils.Subprocess([EXE_PATH], env=environ).output
-
-EX_BINARY_OUTPUT = gtest_test_utils.Subprocess(
-    [EX_EXE_PATH], env=environ).output
-
-
-# The tests.
-if SUPPORTS_SEH_EXCEPTIONS:
-  # pylint:disable-msg=C6302
-  class CatchSehExceptionsTest(gtest_test_utils.TestCase):
-    """Tests exception-catching behavior."""
-
-
-    def TestSehExceptions(self, test_output):
-      self.assert_('SEH exception with code 0x2a thrown '
-                   'in the test fixture\'s constructor'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown '
-                   'in the test fixture\'s destructor'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in SetUpTestSuite()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in TearDownTestSuite()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in SetUp()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in TearDown()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in the test body'
-                   in test_output)
-
-    def testCatchesSehExceptionsWithCxxExceptionsEnabled(self):
-      self.TestSehExceptions(EX_BINARY_OUTPUT)
-
-    def testCatchesSehExceptionsWithCxxExceptionsDisabled(self):
-      self.TestSehExceptions(BINARY_OUTPUT)
-
-
-class CatchCxxExceptionsTest(gtest_test_utils.TestCase):
-  """Tests C++ exception-catching behavior.
-
-     Tests in this test case verify that:
-     * C++ exceptions are caught and logged as C++ (not SEH) exceptions
-     * Exception thrown affect the remainder of the test work flow in the
-       expected manner.
-  """
-
-  def testCatchesCxxExceptionsInFixtureConstructor(self):
-    self.assertTrue(
-        'C++ exception with description '
-        '"Standard C++ exception" thrown '
-        'in the test fixture\'s constructor' in EX_BINARY_OUTPUT,
-        EX_BINARY_OUTPUT)
-    self.assert_('unexpected' not in EX_BINARY_OUTPUT,
-                 'This failure belongs in this test only if '
-                 '"CxxExceptionInConstructorTest" (no quotes) '
-                 'appears on the same line as words "called unexpectedly"')
-
-  if ('CxxExceptionInDestructorTest.ThrowsExceptionInDestructor' in
-      EX_BINARY_OUTPUT):
-
-    def testCatchesCxxExceptionsInFixtureDestructor(self):
-      self.assertTrue(
-          'C++ exception with description '
-          '"Standard C++ exception" thrown '
-          'in the test fixture\'s destructor' in EX_BINARY_OUTPUT,
-          EX_BINARY_OUTPUT)
-      self.assertTrue(
-          'CxxExceptionInDestructorTest::TearDownTestSuite() '
-          'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInSetUpTestCase(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in SetUpTestSuite()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInConstructorTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest constructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest::SetUp() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest test body '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInTearDownTestCase(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in TearDownTestSuite()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInSetUp(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in SetUp()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assert_('unexpected' not in EX_BINARY_OUTPUT,
-                 'This failure belongs in this test only if '
-                 '"CxxExceptionInSetUpTest" (no quotes) '
-                 'appears on the same line as words "called unexpectedly"')
-
-  def testCatchesCxxExceptionsInTearDown(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in TearDown()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTearDownTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTearDownTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInTestBody(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in the test body' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesNonStdCxxExceptions(self):
-    self.assertTrue(
-        'Unknown C++ exception thrown in the test body' in EX_BINARY_OUTPUT,
-        EX_BINARY_OUTPUT)
-
-  def testUnhandledCxxExceptionsAbortTheProgram(self):
-    # Filters out SEH exception tests on Windows. Unhandled SEH exceptions
-    # cause tests to show pop-up windows there.
-    FITLER_OUT_SEH_TESTS_FLAG = FILTER_FLAG + '=-*Seh*'
-    # By default, Google Test doesn't catch the exceptions.
-    uncaught_exceptions_ex_binary_output = gtest_test_utils.Subprocess(
-        [EX_EXE_PATH,
-         NO_CATCH_EXCEPTIONS_FLAG,
-         FITLER_OUT_SEH_TESTS_FLAG],
-        env=environ).output
-
-    self.assert_('Unhandled C++ exception terminating the program'
-                 in uncaught_exceptions_ex_binary_output)
-    self.assert_('unexpected' not in uncaught_exceptions_ex_binary_output)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-catch-exceptions-test_.cc b/third_party/googletest/googletest/test/googletest-catch-exceptions-test_.cc
deleted file mode 100644
index 8c127d4..0000000
--- a/third_party/googletest/googletest/test/googletest-catch-exceptions-test_.cc
+++ /dev/null
@@ -1,293 +0,0 @@
-// Copyright 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself. Tests in this file throw C++ or SEH
-// exceptions, and the output is verified by
-// googletest-catch-exceptions-test.py.
-
-#include <stdio.h>  // NOLINT
-#include <stdlib.h>  // For exit().
-
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_SEH
-# include <windows.h>
-#endif
-
-#if GTEST_HAS_EXCEPTIONS
-# include <exception>  // For set_terminate().
-# include <stdexcept>
-#endif
-
-using testing::Test;
-
-#if GTEST_HAS_SEH
-
-class SehExceptionInConstructorTest : public Test {
- public:
-  SehExceptionInConstructorTest() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInConstructorTest, ThrowsExceptionInConstructor) {}
-
-class SehExceptionInDestructorTest : public Test {
- public:
-  ~SehExceptionInDestructorTest() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInDestructorTest, ThrowsExceptionInDestructor) {}
-
-class SehExceptionInSetUpTestSuiteTest : public Test {
- public:
-  static void SetUpTestSuite() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInSetUpTestSuiteTest, ThrowsExceptionInSetUpTestSuite) {}
-
-class SehExceptionInTearDownTestSuiteTest : public Test {
- public:
-  static void TearDownTestSuite() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInTearDownTestSuiteTest,
-       ThrowsExceptionInTearDownTestSuite) {}
-
-class SehExceptionInSetUpTest : public Test {
- protected:
-  virtual void SetUp() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInSetUpTest, ThrowsExceptionInSetUp) {}
-
-class SehExceptionInTearDownTest : public Test {
- protected:
-  virtual void TearDown() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInTearDownTest, ThrowsExceptionInTearDown) {}
-
-TEST(SehExceptionTest, ThrowsSehException) {
-  RaiseException(42, 0, 0, NULL);
-}
-
-#endif  // GTEST_HAS_SEH
-
-#if GTEST_HAS_EXCEPTIONS
-
-class CxxExceptionInConstructorTest : public Test {
- public:
-  CxxExceptionInConstructorTest() {
-    // Without this macro VC++ complains about unreachable code at the end of
-    // the constructor.
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        throw std::runtime_error("Standard C++ exception"));
-  }
-
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInConstructorTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInConstructorTest() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest destructor "
-                  << "called unexpectedly.";
-  }
-
-  void SetUp() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest::SetUp() "
-                  << "called unexpectedly.";
-  }
-
-  void TearDown() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest::TearDown() "
-                  << "called unexpectedly.";
-  }
-};
-
-TEST_F(CxxExceptionInConstructorTest, ThrowsExceptionInConstructor) {
-  ADD_FAILURE() << "CxxExceptionInConstructorTest test body "
-                << "called unexpectedly.";
-}
-
-class CxxExceptionInSetUpTestSuiteTest : public Test {
- public:
-  CxxExceptionInSetUpTestSuiteTest() {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest constructor "
-           "called as expected.\n");
-  }
-
-  static void SetUpTestSuite() {
-    throw std::runtime_error("Standard C++ exception");
-  }
-
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInSetUpTestSuiteTest() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest destructor "
-           "called as expected.\n");
-  }
-
-  void SetUp() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::SetUp() "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInSetUpTestSuiteTest, ThrowsExceptionInSetUpTestSuite) {
-  printf("%s",
-         "CxxExceptionInSetUpTestSuiteTest test body "
-         "called as expected.\n");
-}
-
-class CxxExceptionInTearDownTestSuiteTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    throw std::runtime_error("Standard C++ exception");
-  }
-};
-
-TEST_F(CxxExceptionInTearDownTestSuiteTest,
-       ThrowsExceptionInTearDownTestSuite) {}
-
-class CxxExceptionInSetUpTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInSetUpTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInSetUpTest() override {
-    printf("%s",
-           "CxxExceptionInSetUpTest destructor "
-           "called as expected.\n");
-  }
-
-  void SetUp() override { throw std::runtime_error("Standard C++ exception"); }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInSetUpTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInSetUpTest, ThrowsExceptionInSetUp) {
-  ADD_FAILURE() << "CxxExceptionInSetUpTest test body "
-                << "called unexpectedly.";
-}
-
-class CxxExceptionInTearDownTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInTearDownTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInTearDownTest() override {
-    printf("%s",
-           "CxxExceptionInTearDownTest destructor "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    throw std::runtime_error("Standard C++ exception");
-  }
-};
-
-TEST_F(CxxExceptionInTearDownTest, ThrowsExceptionInTearDown) {}
-
-class CxxExceptionInTestBodyTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInTestBodyTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInTestBodyTest() override {
-    printf("%s",
-           "CxxExceptionInTestBodyTest destructor "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInTestBodyTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInTestBodyTest, ThrowsStdCxxException) {
-  throw std::runtime_error("Standard C++ exception");
-}
-
-TEST(CxxExceptionTest, ThrowsNonStdCxxException) {
-  throw "C-string";
-}
-
-// This terminate handler aborts the program using exit() rather than abort().
-// This avoids showing pop-ups on Windows systems and core dumps on Unix-like
-// ones.
-void TerminateHandler() {
-  fprintf(stderr, "%s\n", "Unhandled C++ exception terminating the program.");
-  fflush(nullptr);
-  exit(3);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-int main(int argc, char** argv) {
-#if GTEST_HAS_EXCEPTIONS
-  std::set_terminate(&TerminateHandler);
-#endif
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-color-test.py b/third_party/googletest/googletest/test/googletest-color-test.py
deleted file mode 100755
index f3b7c99..0000000
--- a/third_party/googletest/googletest/test/googletest-color-test.py
+++ /dev/null
@@ -1,127 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test correctly determines whether to use colors."""
-
-import os
-import gtest_test_utils
-
-IS_WINDOWS = os.name == 'nt'
-
-COLOR_ENV_VAR = 'GTEST_COLOR'
-COLOR_FLAG = 'gtest_color'
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-color-test_')
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    os.environ[env_var] = value
-  elif env_var in os.environ:
-    del os.environ[env_var]
-
-
-def UsesColor(term, color_env_var, color_flag):
-  """Runs googletest-color-test_ and returns its exit code."""
-
-  SetEnvVar('TERM', term)
-  SetEnvVar(COLOR_ENV_VAR, color_env_var)
-
-  if color_flag is None:
-    args = []
-  else:
-    args = ['--%s=%s' % (COLOR_FLAG, color_flag)]
-  p = gtest_test_utils.Subprocess([COMMAND] + args)
-  return not p.exited or p.exit_code
-
-
-class GTestColorTest(gtest_test_utils.TestCase):
-  def testNoEnvVarNoFlag(self):
-    """Tests the case when there's neither GTEST_COLOR nor --gtest_color."""
-
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('dumb', None, None))
-      self.assert_(not UsesColor('emacs', None, None))
-      self.assert_(not UsesColor('xterm-mono', None, None))
-      self.assert_(not UsesColor('unknown', None, None))
-      self.assert_(not UsesColor(None, None, None))
-    self.assert_(UsesColor('linux', None, None))
-    self.assert_(UsesColor('cygwin', None, None))
-    self.assert_(UsesColor('xterm', None, None))
-    self.assert_(UsesColor('xterm-color', None, None))
-    self.assert_(UsesColor('xterm-256color', None, None))
-
-  def testFlagOnly(self):
-    """Tests the case when there's --gtest_color but not GTEST_COLOR."""
-
-    self.assert_(not UsesColor('dumb', None, 'no'))
-    self.assert_(not UsesColor('xterm-color', None, 'no'))
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('emacs', None, 'auto'))
-    self.assert_(UsesColor('xterm', None, 'auto'))
-    self.assert_(UsesColor('dumb', None, 'yes'))
-    self.assert_(UsesColor('xterm', None, 'yes'))
-
-  def testEnvVarOnly(self):
-    """Tests the case when there's GTEST_COLOR but not --gtest_color."""
-
-    self.assert_(not UsesColor('dumb', 'no', None))
-    self.assert_(not UsesColor('xterm-color', 'no', None))
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('dumb', 'auto', None))
-    self.assert_(UsesColor('xterm-color', 'auto', None))
-    self.assert_(UsesColor('dumb', 'yes', None))
-    self.assert_(UsesColor('xterm-color', 'yes', None))
-
-  def testEnvVarAndFlag(self):
-    """Tests the case when there are both GTEST_COLOR and --gtest_color."""
-
-    self.assert_(not UsesColor('xterm-color', 'no', 'no'))
-    self.assert_(UsesColor('dumb', 'no', 'yes'))
-    self.assert_(UsesColor('xterm-color', 'no', 'auto'))
-
-  def testAliasesOfYesAndNo(self):
-    """Tests using aliases in specifying --gtest_color."""
-
-    self.assert_(UsesColor('dumb', None, 'true'))
-    self.assert_(UsesColor('dumb', None, 'YES'))
-    self.assert_(UsesColor('dumb', None, 'T'))
-    self.assert_(UsesColor('dumb', None, '1'))
-
-    self.assert_(not UsesColor('xterm', None, 'f'))
-    self.assert_(not UsesColor('xterm', None, 'false'))
-    self.assert_(not UsesColor('xterm', None, '0'))
-    self.assert_(not UsesColor('xterm', None, 'unknown'))
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-color-test_.cc b/third_party/googletest/googletest/test/googletest-color-test_.cc
deleted file mode 100644
index 220a3a0..0000000
--- a/third_party/googletest/googletest/test/googletest-color-test_.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// A helper program for testing how Google Test determines whether to use
-// colors in the output.  It prints "YES" and returns 1 if Google Test
-// decides to use colors, and prints "NO" and returns 0 otherwise.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-using testing::internal::ShouldUseColor;
-
-// The purpose of this is to ensure that the UnitTest singleton is
-// created before main() is entered, and thus that ShouldUseColor()
-// works the same way as in a real Google-Test-based test.  We don't actual
-// run the TEST itself.
-TEST(GTestColorTest, Dummy) {
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  if (ShouldUseColor(true)) {
-    // Google Test decides to use colors in the output (assuming it
-    // goes to a TTY).
-    printf("YES\n");
-    return 1;
-  } else {
-    // Google Test decides not to use colors in the output.
-    printf("NO\n");
-    return 0;
-  }
-}
diff --git a/third_party/googletest/googletest/test/googletest-death-test-test.cc b/third_party/googletest/googletest/test/googletest-death-test-test.cc
deleted file mode 100644
index c0b3d1f..0000000
--- a/third_party/googletest/googletest/test/googletest-death-test-test.cc
+++ /dev/null
@@ -1,1542 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for death tests.
-
-#include "gtest/gtest-death-test.h"
-
-#include "gtest/gtest.h"
-#include "gtest/internal/gtest-filepath.h"
-
-using testing::internal::AlwaysFalse;
-using testing::internal::AlwaysTrue;
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_WINDOWS
-#  include <fcntl.h>           // For O_BINARY
-#  include <direct.h>          // For chdir().
-#  include <io.h>
-# else
-#  include <unistd.h>
-#  include <sys/wait.h>        // For waitpid.
-# endif  // GTEST_OS_WINDOWS
-
-# include <limits.h>
-# include <signal.h>
-# include <stdio.h>
-
-# if GTEST_OS_LINUX
-#  include <sys/time.h>
-# endif  // GTEST_OS_LINUX
-
-# include "gtest/gtest-spi.h"
-# include "src/gtest-internal-inl.h"
-
-namespace posix = ::testing::internal::posix;
-
-using testing::ContainsRegex;
-using testing::Matcher;
-using testing::Message;
-using testing::internal::DeathTest;
-using testing::internal::DeathTestFactory;
-using testing::internal::FilePath;
-using testing::internal::GetLastErrnoDescription;
-using testing::internal::GetUnitTestImpl;
-using testing::internal::InDeathTestChild;
-using testing::internal::ParseNaturalNumber;
-
-namespace testing {
-namespace internal {
-
-// A helper class whose objects replace the death test factory for a
-// single UnitTest object during their lifetimes.
-class ReplaceDeathTestFactory {
- public:
-  explicit ReplaceDeathTestFactory(DeathTestFactory* new_factory)
-      : unit_test_impl_(GetUnitTestImpl()) {
-    old_factory_ = unit_test_impl_->death_test_factory_.release();
-    unit_test_impl_->death_test_factory_.reset(new_factory);
-  }
-
-  ~ReplaceDeathTestFactory() {
-    unit_test_impl_->death_test_factory_.release();
-    unit_test_impl_->death_test_factory_.reset(old_factory_);
-  }
- private:
-  // Prevents copying ReplaceDeathTestFactory objects.
-  ReplaceDeathTestFactory(const ReplaceDeathTestFactory&);
-  void operator=(const ReplaceDeathTestFactory&);
-
-  UnitTestImpl* unit_test_impl_;
-  DeathTestFactory* old_factory_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-namespace {
-
-void DieWithMessage(const ::std::string& message) {
-  fprintf(stderr, "%s", message.c_str());
-  fflush(stderr);  // Make sure the text is printed before the process exits.
-
-  // We call _exit() instead of exit(), as the former is a direct
-  // system call and thus safer in the presence of threads.  exit()
-  // will invoke user-defined exit-hooks, which may do dangerous
-  // things that conflict with death tests.
-  //
-  // Some compilers can recognize that _exit() never returns and issue the
-  // 'unreachable code' warning for code following this function, unless
-  // fooled by a fake condition.
-  if (AlwaysTrue())
-    _exit(1);
-}
-
-void DieInside(const ::std::string& function) {
-  DieWithMessage("death inside " + function + "().");
-}
-
-// Tests that death tests work.
-
-class TestForDeathTest : public testing::Test {
- protected:
-  TestForDeathTest() : original_dir_(FilePath::GetCurrentDir()) {}
-
-  ~TestForDeathTest() override { posix::ChDir(original_dir_.c_str()); }
-
-  // A static member function that's expected to die.
-  static void StaticMemberFunction() { DieInside("StaticMemberFunction"); }
-
-  // A method of the test fixture that may die.
-  void MemberFunction() {
-    if (should_die_)
-      DieInside("MemberFunction");
-  }
-
-  // True if and only if MemberFunction() should die.
-  bool should_die_;
-  const FilePath original_dir_;
-};
-
-// A class with a member function that may die.
-class MayDie {
- public:
-  explicit MayDie(bool should_die) : should_die_(should_die) {}
-
-  // A member function that may die.
-  void MemberFunction() const {
-    if (should_die_)
-      DieInside("MayDie::MemberFunction");
-  }
-
- private:
-  // True if and only if MemberFunction() should die.
-  bool should_die_;
-};
-
-// A global function that's expected to die.
-void GlobalFunction() { DieInside("GlobalFunction"); }
-
-// A non-void function that's expected to die.
-int NonVoidFunction() {
-  DieInside("NonVoidFunction");
-  return 1;
-}
-
-// A unary function that may die.
-void DieIf(bool should_die) {
-  if (should_die)
-    DieInside("DieIf");
-}
-
-// A binary function that may die.
-bool DieIfLessThan(int x, int y) {
-  if (x < y) {
-    DieInside("DieIfLessThan");
-  }
-  return true;
-}
-
-// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
-void DeathTestSubroutine() {
-  EXPECT_DEATH(GlobalFunction(), "death.*GlobalFunction");
-  ASSERT_DEATH(GlobalFunction(), "death.*GlobalFunction");
-}
-
-// Death in dbg, not opt.
-int DieInDebugElse12(int* sideeffect) {
-  if (sideeffect) *sideeffect = 12;
-
-# ifndef NDEBUG
-
-  DieInside("DieInDebugElse12");
-
-# endif  // NDEBUG
-
-  return 12;
-}
-
-# if GTEST_OS_WINDOWS
-
-// Death in dbg due to Windows CRT assertion failure, not opt.
-int DieInCRTDebugElse12(int* sideeffect) {
-  if (sideeffect) *sideeffect = 12;
-
-  // Create an invalid fd by closing a valid one
-  int fdpipe[2];
-  EXPECT_EQ(_pipe(fdpipe, 256, O_BINARY), 0);
-  EXPECT_EQ(_close(fdpipe[0]), 0);
-  EXPECT_EQ(_close(fdpipe[1]), 0);
-
-  // _dup() should crash in debug mode
-  EXPECT_EQ(_dup(fdpipe[0]), -1);
-
-  return 12;
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-// Tests the ExitedWithCode predicate.
-TEST(ExitStatusPredicateTest, ExitedWithCode) {
-  // On Windows, the process's exit code is the same as its exit status,
-  // so the predicate just compares the its input with its parameter.
-  EXPECT_TRUE(testing::ExitedWithCode(0)(0));
-  EXPECT_TRUE(testing::ExitedWithCode(1)(1));
-  EXPECT_TRUE(testing::ExitedWithCode(42)(42));
-  EXPECT_FALSE(testing::ExitedWithCode(0)(1));
-  EXPECT_FALSE(testing::ExitedWithCode(1)(0));
-}
-
-# else
-
-// Returns the exit status of a process that calls _exit(2) with a
-// given exit code.  This is a helper function for the
-// ExitStatusPredicateTest test suite.
-static int NormalExitStatus(int exit_code) {
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    _exit(exit_code);
-  }
-  int status;
-  waitpid(child_pid, &status, 0);
-  return status;
-}
-
-// Returns the exit status of a process that raises a given signal.
-// If the signal does not cause the process to die, then it returns
-// instead the exit status of a process that exits normally with exit
-// code 1.  This is a helper function for the ExitStatusPredicateTest
-// test suite.
-static int KilledExitStatus(int signum) {
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    raise(signum);
-    _exit(1);
-  }
-  int status;
-  waitpid(child_pid, &status, 0);
-  return status;
-}
-
-// Tests the ExitedWithCode predicate.
-TEST(ExitStatusPredicateTest, ExitedWithCode) {
-  const int status0  = NormalExitStatus(0);
-  const int status1  = NormalExitStatus(1);
-  const int status42 = NormalExitStatus(42);
-  const testing::ExitedWithCode pred0(0);
-  const testing::ExitedWithCode pred1(1);
-  const testing::ExitedWithCode pred42(42);
-  EXPECT_PRED1(pred0,  status0);
-  EXPECT_PRED1(pred1,  status1);
-  EXPECT_PRED1(pred42, status42);
-  EXPECT_FALSE(pred0(status1));
-  EXPECT_FALSE(pred42(status0));
-  EXPECT_FALSE(pred1(status42));
-}
-
-// Tests the KilledBySignal predicate.
-TEST(ExitStatusPredicateTest, KilledBySignal) {
-  const int status_segv = KilledExitStatus(SIGSEGV);
-  const int status_kill = KilledExitStatus(SIGKILL);
-  const testing::KilledBySignal pred_segv(SIGSEGV);
-  const testing::KilledBySignal pred_kill(SIGKILL);
-  EXPECT_PRED1(pred_segv, status_segv);
-  EXPECT_PRED1(pred_kill, status_kill);
-  EXPECT_FALSE(pred_segv(status_kill));
-  EXPECT_FALSE(pred_kill(status_segv));
-}
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-// The following code intentionally tests a suboptimal syntax.
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdangling-else"
-#pragma GCC diagnostic ignored "-Wempty-body"
-#pragma GCC diagnostic ignored "-Wpragmas"
-#endif
-// Tests that the death test macros expand to code which may or may not
-// be followed by operator<<, and that in either case the complete text
-// comprises only a single C++ statement.
-TEST_F(TestForDeathTest, SingleStatement) {
-  if (AlwaysFalse())
-    // This would fail if executed; this is a compilation test only
-    ASSERT_DEATH(return, "");
-
-  if (AlwaysTrue())
-    EXPECT_DEATH(_exit(1), "");
-  else
-    // This empty "else" branch is meant to ensure that EXPECT_DEATH
-    // doesn't expand into an "if" statement without an "else"
-    ;
-
-  if (AlwaysFalse())
-    ASSERT_DEATH(return, "") << "did not die";
-
-  if (AlwaysFalse())
-    ;
-  else
-    EXPECT_DEATH(_exit(1), "") << 1 << 2 << 3;
-}
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-# if GTEST_USES_PCRE
-
-void DieWithEmbeddedNul() {
-  fprintf(stderr, "Hello%cmy null world.\n", '\0');
-  fflush(stderr);
-  _exit(1);
-}
-
-// Tests that EXPECT_DEATH and ASSERT_DEATH work when the error
-// message has a NUL character in it.
-TEST_F(TestForDeathTest, EmbeddedNulInMessage) {
-  EXPECT_DEATH(DieWithEmbeddedNul(), "my null world");
-  ASSERT_DEATH(DieWithEmbeddedNul(), "my null world");
-}
-
-# endif  // GTEST_USES_PCRE
-
-// Tests that death test macros expand to code which interacts well with switch
-// statements.
-TEST_F(TestForDeathTest, SwitchStatement) {
-  // Microsoft compiler usually complains about switch statements without
-  // case labels. We suppress that warning for this test.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4065)
-
-  switch (0)
-    default:
-      ASSERT_DEATH(_exit(1), "") << "exit in default switch handler";
-
-  switch (0)
-    case 0:
-      EXPECT_DEATH(_exit(1), "") << "exit in switch case";
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-}
-
-// Tests that a static member function can be used in a "fast" style
-// death test.
-TEST_F(TestForDeathTest, StaticMemberFunctionFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
-}
-
-// Tests that a method of the test fixture can be used in a "fast"
-// style death test.
-TEST_F(TestForDeathTest, MemberFunctionFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  should_die_ = true;
-  EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
-}
-
-void ChangeToRootDir() { posix::ChDir(GTEST_PATH_SEP_); }
-
-// Tests that death tests work even if the current directory has been
-// changed.
-TEST_F(TestForDeathTest, FastDeathTestInChangedDir) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-
-  ChangeToRootDir();
-  EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
-
-  ChangeToRootDir();
-  ASSERT_DEATH(_exit(1), "");
-}
-
-# if GTEST_OS_LINUX
-void SigprofAction(int, siginfo_t*, void*) { /* no op */ }
-
-// Sets SIGPROF action and ITIMER_PROF timer (interval: 1ms).
-void SetSigprofActionAndTimer() {
-  struct sigaction signal_action;
-  memset(&signal_action, 0, sizeof(signal_action));
-  sigemptyset(&signal_action.sa_mask);
-  signal_action.sa_sigaction = SigprofAction;
-  signal_action.sa_flags = SA_RESTART | SA_SIGINFO;
-  ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, nullptr));
-  // timer comes second, to avoid SIGPROF premature delivery, as suggested at
-  // https://www.gnu.org/software/libc/manual/html_node/Setting-an-Alarm.html
-  struct itimerval timer;
-  timer.it_interval.tv_sec = 0;
-  timer.it_interval.tv_usec = 1;
-  timer.it_value = timer.it_interval;
-  ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, nullptr));
-}
-
-// Disables ITIMER_PROF timer and ignores SIGPROF signal.
-void DisableSigprofActionAndTimer(struct sigaction* old_signal_action) {
-  struct itimerval timer;
-  timer.it_interval.tv_sec = 0;
-  timer.it_interval.tv_usec = 0;
-  timer.it_value = timer.it_interval;
-  ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, nullptr));
-  struct sigaction signal_action;
-  memset(&signal_action, 0, sizeof(signal_action));
-  sigemptyset(&signal_action.sa_mask);
-  signal_action.sa_handler = SIG_IGN;
-  ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, old_signal_action));
-}
-
-// Tests that death tests work when SIGPROF handler and timer are set.
-TEST_F(TestForDeathTest, FastSigprofActionSet) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  SetSigprofActionAndTimer();
-  EXPECT_DEATH(_exit(1), "");
-  struct sigaction old_signal_action;
-  DisableSigprofActionAndTimer(&old_signal_action);
-  EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
-}
-
-TEST_F(TestForDeathTest, ThreadSafeSigprofActionSet) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  SetSigprofActionAndTimer();
-  EXPECT_DEATH(_exit(1), "");
-  struct sigaction old_signal_action;
-  DisableSigprofActionAndTimer(&old_signal_action);
-  EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
-}
-# endif  // GTEST_OS_LINUX
-
-// Repeats a representative sample of death tests in the "threadsafe" style:
-
-TEST_F(TestForDeathTest, StaticMemberFunctionThreadsafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
-}
-
-TEST_F(TestForDeathTest, MemberFunctionThreadsafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  should_die_ = true;
-  EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
-}
-
-TEST_F(TestForDeathTest, ThreadsafeDeathTestInLoop) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-
-  for (int i = 0; i < 3; ++i)
-    EXPECT_EXIT(_exit(i), testing::ExitedWithCode(i), "") << ": i = " << i;
-}
-
-TEST_F(TestForDeathTest, ThreadsafeDeathTestInChangedDir) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-
-  ChangeToRootDir();
-  EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
-
-  ChangeToRootDir();
-  ASSERT_DEATH(_exit(1), "");
-}
-
-TEST_F(TestForDeathTest, MixedStyles) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_DEATH(_exit(1), "");
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH(_exit(1), "");
-}
-
-# if GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
-
-bool pthread_flag;
-
-void SetPthreadFlag() {
-  pthread_flag = true;
-}
-
-TEST_F(TestForDeathTest, DoesNotExecuteAtforkHooks) {
-  if (!testing::GTEST_FLAG(death_test_use_fork)) {
-    testing::GTEST_FLAG(death_test_style) = "threadsafe";
-    pthread_flag = false;
-    ASSERT_EQ(0, pthread_atfork(&SetPthreadFlag, nullptr, nullptr));
-    ASSERT_DEATH(_exit(1), "");
-    ASSERT_FALSE(pthread_flag);
-  }
-}
-
-# endif  // GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
-
-// Tests that a method of another class can be used in a death test.
-TEST_F(TestForDeathTest, MethodOfAnotherClass) {
-  const MayDie x(true);
-  ASSERT_DEATH(x.MemberFunction(), "MayDie\\:\\:MemberFunction");
-}
-
-// Tests that a global function can be used in a death test.
-TEST_F(TestForDeathTest, GlobalFunction) {
-  EXPECT_DEATH(GlobalFunction(), "GlobalFunction");
-}
-
-// Tests that any value convertible to an RE works as a second
-// argument to EXPECT_DEATH.
-TEST_F(TestForDeathTest, AcceptsAnythingConvertibleToRE) {
-  static const char regex_c_str[] = "GlobalFunction";
-  EXPECT_DEATH(GlobalFunction(), regex_c_str);
-
-  const testing::internal::RE regex(regex_c_str);
-  EXPECT_DEATH(GlobalFunction(), regex);
-
-# if !GTEST_USES_PCRE
-
-  const ::std::string regex_std_str(regex_c_str);
-  EXPECT_DEATH(GlobalFunction(), regex_std_str);
-
-  // This one is tricky; a temporary pointer into another temporary.  Reference
-  // lifetime extension of the pointer is not sufficient.
-  EXPECT_DEATH(GlobalFunction(), ::std::string(regex_c_str).c_str());
-
-# endif  // !GTEST_USES_PCRE
-}
-
-// Tests that a non-void function can be used in a death test.
-TEST_F(TestForDeathTest, NonVoidFunction) {
-  ASSERT_DEATH(NonVoidFunction(), "NonVoidFunction");
-}
-
-// Tests that functions that take parameter(s) can be used in a death test.
-TEST_F(TestForDeathTest, FunctionWithParameter) {
-  EXPECT_DEATH(DieIf(true), "DieIf\\(\\)");
-  EXPECT_DEATH(DieIfLessThan(2, 3), "DieIfLessThan");
-}
-
-// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
-TEST_F(TestForDeathTest, OutsideFixture) {
-  DeathTestSubroutine();
-}
-
-// Tests that death tests can be done inside a loop.
-TEST_F(TestForDeathTest, InsideLoop) {
-  for (int i = 0; i < 5; i++) {
-    EXPECT_DEATH(DieIfLessThan(-1, i), "DieIfLessThan") << "where i == " << i;
-  }
-}
-
-// Tests that a compound statement can be used in a death test.
-TEST_F(TestForDeathTest, CompoundStatement) {
-  EXPECT_DEATH({  // NOLINT
-    const int x = 2;
-    const int y = x + 1;
-    DieIfLessThan(x, y);
-  },
-  "DieIfLessThan");
-}
-
-// Tests that code that doesn't die causes a death test to fail.
-TEST_F(TestForDeathTest, DoesNotDie) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(DieIf(false), "DieIf"),
-                          "failed to die");
-}
-
-// Tests that a death test fails when the error message isn't expected.
-TEST_F(TestForDeathTest, ErrorMessageMismatch) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(DieIf(true), "DieIfLessThan") << "End of death test message.";
-  }, "died but not with expected error");
-}
-
-// On exit, *aborted will be true if and only if the EXPECT_DEATH()
-// statement aborted the function.
-void ExpectDeathTestHelper(bool* aborted) {
-  *aborted = true;
-  EXPECT_DEATH(DieIf(false), "DieIf");  // This assertion should fail.
-  *aborted = false;
-}
-
-// Tests that EXPECT_DEATH doesn't abort the test on failure.
-TEST_F(TestForDeathTest, EXPECT_DEATH) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(ExpectDeathTestHelper(&aborted),
-                          "failed to die");
-  EXPECT_FALSE(aborted);
-}
-
-// Tests that ASSERT_DEATH does abort the test on failure.
-TEST_F(TestForDeathTest, ASSERT_DEATH) {
-  static bool aborted;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    aborted = true;
-    ASSERT_DEATH(DieIf(false), "DieIf");  // This assertion should fail.
-    aborted = false;
-  }, "failed to die");
-  EXPECT_TRUE(aborted);
-}
-
-// Tests that EXPECT_DEATH evaluates the arguments exactly once.
-TEST_F(TestForDeathTest, SingleEvaluation) {
-  int x = 3;
-  EXPECT_DEATH(DieIf((++x) == 4), "DieIf");
-
-  const char* regex = "DieIf";
-  const char* regex_save = regex;
-  EXPECT_DEATH(DieIfLessThan(3, 4), regex++);
-  EXPECT_EQ(regex_save + 1, regex);
-}
-
-// Tests that run-away death tests are reported as failures.
-TEST_F(TestForDeathTest, RunawayIsFailure) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(static_cast<void>(0), "Foo"),
-                          "failed to die.");
-}
-
-// Tests that death tests report executing 'return' in the statement as
-// failure.
-TEST_F(TestForDeathTest, ReturnIsFailure) {
-  EXPECT_FATAL_FAILURE(ASSERT_DEATH(return, "Bar"),
-                       "illegal return in test statement.");
-}
-
-// Tests that EXPECT_DEBUG_DEATH works as expected, that is, you can stream a
-// message to it, and in debug mode it:
-// 1. Asserts on death.
-// 2. Has no side effect.
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, TestExpectDebugDeath) {
-  int sideeffect = 0;
-
-  // Put the regex in a local variable to make sure we don't get an "unused"
-  // warning in opt mode.
-  const char* regex = "death.*DieInDebugElse12";
-
-  EXPECT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), regex)
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# if GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEBUG_DEATH works as expected when in debug mode
-// the Windows CRT crashes the process with an assertion failure.
-// 1. Asserts on death.
-// 2. Has no side effect (doesn't pop up a window or wait for user input).
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, CRTDebugDeath) {
-  int sideeffect = 0;
-
-  // Put the regex in a local variable to make sure we don't get an "unused"
-  // warning in opt mode.
-  const char* regex = "dup.* : Assertion failed";
-
-  EXPECT_DEBUG_DEATH(DieInCRTDebugElse12(&sideeffect), regex)
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# endif  // GTEST_OS_WINDOWS
-
-// Tests that ASSERT_DEBUG_DEATH works as expected, that is, you can stream a
-// message to it, and in debug mode it:
-// 1. Asserts on death.
-// 2. Has no side effect.
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, TestAssertDebugDeath) {
-  int sideeffect = 0;
-
-  ASSERT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), "death.*DieInDebugElse12")
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# ifndef NDEBUG
-
-void ExpectDebugDeathHelper(bool* aborted) {
-  *aborted = true;
-  EXPECT_DEBUG_DEATH(return, "") << "This is expected to fail.";
-  *aborted = false;
-}
-
-#  if GTEST_OS_WINDOWS
-TEST(PopUpDeathTest, DoesNotShowPopUpOnAbort) {
-  printf("This test should be considered failing if it shows "
-         "any pop-up dialogs.\n");
-  fflush(stdout);
-
-  EXPECT_DEATH({
-    testing::GTEST_FLAG(catch_exceptions) = false;
-    abort();
-  }, "");
-}
-#  endif  // GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEBUG_DEATH in debug mode does not abort
-// the function.
-TEST_F(TestForDeathTest, ExpectDebugDeathDoesNotAbort) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(ExpectDebugDeathHelper(&aborted), "");
-  EXPECT_FALSE(aborted);
-}
-
-void AssertDebugDeathHelper(bool* aborted) {
-  *aborted = true;
-  GTEST_LOG_(INFO) << "Before ASSERT_DEBUG_DEATH";
-  ASSERT_DEBUG_DEATH(GTEST_LOG_(INFO) << "In ASSERT_DEBUG_DEATH"; return, "")
-      << "This is expected to fail.";
-  GTEST_LOG_(INFO) << "After ASSERT_DEBUG_DEATH";
-  *aborted = false;
-}
-
-// Tests that ASSERT_DEBUG_DEATH in debug mode aborts the function on
-// failure.
-TEST_F(TestForDeathTest, AssertDebugDeathAborts) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts2) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts3) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts4) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts5) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts6) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts7) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts8) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts9) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts10) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-# endif  // _NDEBUG
-
-// Tests the *_EXIT family of macros, using a variety of predicates.
-static void TestExitMacros() {
-  EXPECT_EXIT(_exit(1),  testing::ExitedWithCode(1),  "");
-  ASSERT_EXIT(_exit(42), testing::ExitedWithCode(42), "");
-
-# if GTEST_OS_WINDOWS
-
-  // Of all signals effects on the process exit code, only those of SIGABRT
-  // are documented on Windows.
-  // See https://msdn.microsoft.com/en-us/query-bi/m/dwwzkt4c.
-  EXPECT_EXIT(raise(SIGABRT), testing::ExitedWithCode(3), "") << "b_ar";
-
-# elif !GTEST_OS_FUCHSIA
-
-  // Fuchsia has no unix signals.
-  EXPECT_EXIT(raise(SIGKILL), testing::KilledBySignal(SIGKILL), "") << "foo";
-  ASSERT_EXIT(raise(SIGUSR2), testing::KilledBySignal(SIGUSR2), "") << "bar";
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EXIT(_exit(0), testing::KilledBySignal(SIGSEGV), "")
-      << "This failure is expected, too.";
-  }, "This failure is expected, too.");
-
-# endif  // GTEST_OS_WINDOWS
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_EXIT(raise(SIGSEGV), testing::ExitedWithCode(0), "")
-      << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-TEST_F(TestForDeathTest, ExitMacros) {
-  TestExitMacros();
-}
-
-TEST_F(TestForDeathTest, ExitMacrosUsingFork) {
-  testing::GTEST_FLAG(death_test_use_fork) = true;
-  TestExitMacros();
-}
-
-TEST_F(TestForDeathTest, InvalidStyle) {
-  testing::GTEST_FLAG(death_test_style) = "rococo";
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(_exit(0), "") << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-TEST_F(TestForDeathTest, DeathTestFailedOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("death\n"),
-                   "expected message"),
-      "Actual msg:\n"
-      "[  DEATH   ] death\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestUnexpectedReturnOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH({
-          fprintf(stderr, "returning\n");
-          fflush(stderr);
-          return;
-        }, ""),
-      "    Result: illegal return in test statement.\n"
-      " Error msg:\n"
-      "[  DEATH   ] returning\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestBadExitCodeOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_EXIT(DieWithMessage("exiting with rc 1\n"),
-                  testing::ExitedWithCode(3),
-                  "expected message"),
-      "    Result: died but not with expected exit code:\n"
-      "            Exited with exit status 1\n"
-      "Actual msg:\n"
-      "[  DEATH   ] exiting with rc 1\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestMultiLineMatchFail) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
-                   "line 1\nxyz\nline 3\n"),
-      "Actual msg:\n"
-      "[  DEATH   ] line 1\n"
-      "[  DEATH   ] line 2\n"
-      "[  DEATH   ] line 3\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestMultiLineMatchPass) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
-               "line 1\nline 2\nline 3\n");
-}
-
-// A DeathTestFactory that returns MockDeathTests.
-class MockDeathTestFactory : public DeathTestFactory {
- public:
-  MockDeathTestFactory();
-  bool Create(const char* statement,
-              testing::Matcher<const std::string&> matcher, const char* file,
-              int line, DeathTest** test) override;
-
-  // Sets the parameters for subsequent calls to Create.
-  void SetParameters(bool create, DeathTest::TestRole role,
-                     int status, bool passed);
-
-  // Accessors.
-  int AssumeRoleCalls() const { return assume_role_calls_; }
-  int WaitCalls() const { return wait_calls_; }
-  size_t PassedCalls() const { return passed_args_.size(); }
-  bool PassedArgument(int n) const {
-    return passed_args_[static_cast<size_t>(n)];
-  }
-  size_t AbortCalls() const { return abort_args_.size(); }
-  DeathTest::AbortReason AbortArgument(int n) const {
-    return abort_args_[static_cast<size_t>(n)];
-  }
-  bool TestDeleted() const { return test_deleted_; }
-
- private:
-  friend class MockDeathTest;
-  // If true, Create will return a MockDeathTest; otherwise it returns
-  // NULL.
-  bool create_;
-  // The value a MockDeathTest will return from its AssumeRole method.
-  DeathTest::TestRole role_;
-  // The value a MockDeathTest will return from its Wait method.
-  int status_;
-  // The value a MockDeathTest will return from its Passed method.
-  bool passed_;
-
-  // Number of times AssumeRole was called.
-  int assume_role_calls_;
-  // Number of times Wait was called.
-  int wait_calls_;
-  // The arguments to the calls to Passed since the last call to
-  // SetParameters.
-  std::vector<bool> passed_args_;
-  // The arguments to the calls to Abort since the last call to
-  // SetParameters.
-  std::vector<DeathTest::AbortReason> abort_args_;
-  // True if the last MockDeathTest returned by Create has been
-  // deleted.
-  bool test_deleted_;
-};
-
-
-// A DeathTest implementation useful in testing.  It returns values set
-// at its creation from its various inherited DeathTest methods, and
-// reports calls to those methods to its parent MockDeathTestFactory
-// object.
-class MockDeathTest : public DeathTest {
- public:
-  MockDeathTest(MockDeathTestFactory *parent,
-                TestRole role, int status, bool passed) :
-      parent_(parent), role_(role), status_(status), passed_(passed) {
-  }
-  ~MockDeathTest() override { parent_->test_deleted_ = true; }
-  TestRole AssumeRole() override {
-    ++parent_->assume_role_calls_;
-    return role_;
-  }
-  int Wait() override {
-    ++parent_->wait_calls_;
-    return status_;
-  }
-  bool Passed(bool exit_status_ok) override {
-    parent_->passed_args_.push_back(exit_status_ok);
-    return passed_;
-  }
-  void Abort(AbortReason reason) override {
-    parent_->abort_args_.push_back(reason);
-  }
-
- private:
-  MockDeathTestFactory* const parent_;
-  const TestRole role_;
-  const int status_;
-  const bool passed_;
-};
-
-
-// MockDeathTestFactory constructor.
-MockDeathTestFactory::MockDeathTestFactory()
-    : create_(true),
-      role_(DeathTest::OVERSEE_TEST),
-      status_(0),
-      passed_(true),
-      assume_role_calls_(0),
-      wait_calls_(0),
-      passed_args_(),
-      abort_args_() {
-}
-
-
-// Sets the parameters for subsequent calls to Create.
-void MockDeathTestFactory::SetParameters(bool create,
-                                         DeathTest::TestRole role,
-                                         int status, bool passed) {
-  create_ = create;
-  role_ = role;
-  status_ = status;
-  passed_ = passed;
-
-  assume_role_calls_ = 0;
-  wait_calls_ = 0;
-  passed_args_.clear();
-  abort_args_.clear();
-}
-
-
-// Sets test to NULL (if create_ is false) or to the address of a new
-// MockDeathTest object with parameters taken from the last call
-// to SetParameters (if create_ is true).  Always returns true.
-bool MockDeathTestFactory::Create(
-    const char* /*statement*/, testing::Matcher<const std::string&> /*matcher*/,
-    const char* /*file*/, int /*line*/, DeathTest** test) {
-  test_deleted_ = false;
-  if (create_) {
-    *test = new MockDeathTest(this, role_, status_, passed_);
-  } else {
-    *test = nullptr;
-  }
-  return true;
-}
-
-// A test fixture for testing the logic of the GTEST_DEATH_TEST_ macro.
-// It installs a MockDeathTestFactory that is used for the duration
-// of the test case.
-class MacroLogicDeathTest : public testing::Test {
- protected:
-  static testing::internal::ReplaceDeathTestFactory* replacer_;
-  static MockDeathTestFactory* factory_;
-
-  static void SetUpTestSuite() {
-    factory_ = new MockDeathTestFactory;
-    replacer_ = new testing::internal::ReplaceDeathTestFactory(factory_);
-  }
-
-  static void TearDownTestSuite() {
-    delete replacer_;
-    replacer_ = nullptr;
-    delete factory_;
-    factory_ = nullptr;
-  }
-
-  // Runs a death test that breaks the rules by returning.  Such a death
-  // test cannot be run directly from a test routine that uses a
-  // MockDeathTest, or the remainder of the routine will not be executed.
-  static void RunReturningDeathTest(bool* flag) {
-    ASSERT_DEATH({  // NOLINT
-      *flag = true;
-      return;
-    }, "");
-  }
-};
-
-testing::internal::ReplaceDeathTestFactory* MacroLogicDeathTest::replacer_ =
-    nullptr;
-MockDeathTestFactory* MacroLogicDeathTest::factory_ = nullptr;
-
-// Test that nothing happens when the factory doesn't return a DeathTest:
-TEST_F(MacroLogicDeathTest, NothingHappens) {
-  bool flag = false;
-  factory_->SetParameters(false, DeathTest::OVERSEE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(0, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_FALSE(factory_->TestDeleted());
-}
-
-// Test that the parent process doesn't run the death test code,
-// and that the Passed method returns false when the (simulated)
-// child process exits with status 0:
-TEST_F(MacroLogicDeathTest, ChildExitsSuccessfully) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(1, factory_->WaitCalls());
-  ASSERT_EQ(1U, factory_->PassedCalls());
-  EXPECT_FALSE(factory_->PassedArgument(0));
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the Passed method was given the argument "true" when
-// the (simulated) child process exits with status 1:
-TEST_F(MacroLogicDeathTest, ChildExitsUnsuccessfully) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 1, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(1, factory_->WaitCalls());
-  ASSERT_EQ(1U, factory_->PassedCalls());
-  EXPECT_TRUE(factory_->PassedArgument(0));
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the (simulated) child process executes the death test
-// code, and is aborted with the correct AbortReason if it
-// executes a return statement.
-TEST_F(MacroLogicDeathTest, ChildPerformsReturn) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
-  RunReturningDeathTest(&flag);
-  EXPECT_TRUE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  EXPECT_EQ(1U, factory_->AbortCalls());
-  EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
-            factory_->AbortArgument(0));
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the (simulated) child process is aborted with the
-// correct AbortReason if it does not die.
-TEST_F(MacroLogicDeathTest, ChildDoesNotDie) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_TRUE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  // This time there are two calls to Abort: one since the test didn't
-  // die, and another from the ReturnSentinel when it's destroyed.  The
-  // sentinel normally isn't destroyed if a test doesn't die, since
-  // _exit(2) is called in that case by ForkingDeathTest, but not by
-  // our MockDeathTest.
-  ASSERT_EQ(2U, factory_->AbortCalls());
-  EXPECT_EQ(DeathTest::TEST_DID_NOT_DIE,
-            factory_->AbortArgument(0));
-  EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
-            factory_->AbortArgument(1));
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that a successful death test does not register a successful
-// test part.
-TEST(SuccessRegistrationDeathTest, NoSuccessPart) {
-  EXPECT_DEATH(_exit(1), "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-TEST(StreamingAssertionsDeathTest, DeathTest) {
-  EXPECT_DEATH(_exit(1), "") << "unexpected failure";
-  ASSERT_DEATH(_exit(1), "") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(_exit(0), "") << "expected failure";
-  }, "expected failure");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_DEATH(_exit(0), "") << "expected failure";
-  }, "expected failure");
-}
-
-// Tests that GetLastErrnoDescription returns an empty string when the
-// last error is 0 and non-empty string when it is non-zero.
-TEST(GetLastErrnoDescription, GetLastErrnoDescriptionWorks) {
-  errno = ENOENT;
-  EXPECT_STRNE("", GetLastErrnoDescription().c_str());
-  errno = 0;
-  EXPECT_STREQ("", GetLastErrnoDescription().c_str());
-}
-
-# if GTEST_OS_WINDOWS
-TEST(AutoHandleTest, AutoHandleWorks) {
-  HANDLE handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
-  ASSERT_NE(INVALID_HANDLE_VALUE, handle);
-
-  // Tests that the AutoHandle is correctly initialized with a handle.
-  testing::internal::AutoHandle auto_handle(handle);
-  EXPECT_EQ(handle, auto_handle.Get());
-
-  // Tests that Reset assigns INVALID_HANDLE_VALUE.
-  // Note that this cannot verify whether the original handle is closed.
-  auto_handle.Reset();
-  EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle.Get());
-
-  // Tests that Reset assigns the new handle.
-  // Note that this cannot verify whether the original handle is closed.
-  handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
-  ASSERT_NE(INVALID_HANDLE_VALUE, handle);
-  auto_handle.Reset(handle);
-  EXPECT_EQ(handle, auto_handle.Get());
-
-  // Tests that AutoHandle contains INVALID_HANDLE_VALUE by default.
-  testing::internal::AutoHandle auto_handle2;
-  EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle2.Get());
-}
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_WINDOWS
-typedef unsigned __int64 BiggestParsable;
-typedef signed __int64 BiggestSignedParsable;
-# else
-typedef unsigned long long BiggestParsable;
-typedef signed long long BiggestSignedParsable;
-# endif  // GTEST_OS_WINDOWS
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the
-// max() macro defined by <windows.h>.
-const BiggestParsable kBiggestParsableMax = ULLONG_MAX;
-const BiggestSignedParsable kBiggestSignedParsableMax = LLONG_MAX;
-
-TEST(ParseNaturalNumberTest, RejectsInvalidFormat) {
-  BiggestParsable result = 0;
-
-  // Rejects non-numbers.
-  EXPECT_FALSE(ParseNaturalNumber("non-number string", &result));
-
-  // Rejects numbers with whitespace prefix.
-  EXPECT_FALSE(ParseNaturalNumber(" 123", &result));
-
-  // Rejects negative numbers.
-  EXPECT_FALSE(ParseNaturalNumber("-123", &result));
-
-  // Rejects numbers starting with a plus sign.
-  EXPECT_FALSE(ParseNaturalNumber("+123", &result));
-  errno = 0;
-}
-
-TEST(ParseNaturalNumberTest, RejectsOverflownNumbers) {
-  BiggestParsable result = 0;
-
-  EXPECT_FALSE(ParseNaturalNumber("99999999999999999999999", &result));
-
-  signed char char_result = 0;
-  EXPECT_FALSE(ParseNaturalNumber("200", &char_result));
-  errno = 0;
-}
-
-TEST(ParseNaturalNumberTest, AcceptsValidNumbers) {
-  BiggestParsable result = 0;
-
-  result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &result));
-  EXPECT_EQ(123U, result);
-
-  // Check 0 as an edge case.
-  result = 1;
-  ASSERT_TRUE(ParseNaturalNumber("0", &result));
-  EXPECT_EQ(0U, result);
-
-  result = 1;
-  ASSERT_TRUE(ParseNaturalNumber("00000", &result));
-  EXPECT_EQ(0U, result);
-}
-
-TEST(ParseNaturalNumberTest, AcceptsTypeLimits) {
-  Message msg;
-  msg << kBiggestParsableMax;
-
-  BiggestParsable result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg.GetString(), &result));
-  EXPECT_EQ(kBiggestParsableMax, result);
-
-  Message msg2;
-  msg2 << kBiggestSignedParsableMax;
-
-  BiggestSignedParsable signed_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg2.GetString(), &signed_result));
-  EXPECT_EQ(kBiggestSignedParsableMax, signed_result);
-
-  Message msg3;
-  msg3 << INT_MAX;
-
-  int int_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg3.GetString(), &int_result));
-  EXPECT_EQ(INT_MAX, int_result);
-
-  Message msg4;
-  msg4 << UINT_MAX;
-
-  unsigned int uint_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg4.GetString(), &uint_result));
-  EXPECT_EQ(UINT_MAX, uint_result);
-}
-
-TEST(ParseNaturalNumberTest, WorksForShorterIntegers) {
-  short short_result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &short_result));
-  EXPECT_EQ(123, short_result);
-
-  signed char char_result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &char_result));
-  EXPECT_EQ(123, char_result);
-}
-
-# if GTEST_OS_WINDOWS
-TEST(EnvironmentTest, HandleFitsIntoSizeT) {
-  ASSERT_TRUE(sizeof(HANDLE) <= sizeof(size_t));
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED trigger
-// failures when death tests are available on the system.
-TEST(ConditionalDeathMacrosDeathTest, ExpectsDeathWhenDeathTestsAvailable) {
-  EXPECT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestExpectMacro"),
-                            "death inside CondDeathTestExpectMacro");
-  ASSERT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestAssertMacro"),
-                            "death inside CondDeathTestAssertMacro");
-
-  // Empty statement will not crash, which must trigger a failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH_IF_SUPPORTED(;, ""), "");
-  EXPECT_FATAL_FAILURE(ASSERT_DEATH_IF_SUPPORTED(;, ""), "");
-}
-
-TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_FALSE(InDeathTestChild());
-  EXPECT_DEATH({
-    fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
-    fflush(stderr);
-    _exit(1);
-  }, "Inside");
-}
-
-TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInThreadSafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_FALSE(InDeathTestChild());
-  EXPECT_DEATH({
-    fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
-    fflush(stderr);
-    _exit(1);
-  }, "Inside");
-}
-
-void DieWithMessage(const char* message) {
-  fputs(message, stderr);
-  fflush(stderr);  // Make sure the text is printed before the process exits.
-  _exit(1);
-}
-
-TEST(MatcherDeathTest, DoesNotBreakBareRegexMatching) {
-  // googletest tests this, of course; here we ensure that including googlemock
-  // has not broken it.
-#if GTEST_USES_POSIX_RE
-  EXPECT_DEATH(DieWithMessage("O, I die, Horatio."), "I d[aeiou]e");
-#else
-  EXPECT_DEATH(DieWithMessage("O, I die, Horatio."), "I di?e");
-#endif
-}
-
-TEST(MatcherDeathTest, MonomorphicMatcherMatches) {
-  EXPECT_DEATH(DieWithMessage("Behind O, I am slain!"),
-               Matcher<const std::string&>(ContainsRegex("I am slain")));
-}
-
-TEST(MatcherDeathTest, MonomorphicMatcherDoesNotMatch) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(
-          DieWithMessage("Behind O, I am slain!"),
-          Matcher<const std::string&>(ContainsRegex("Ow, I am slain"))),
-      "Expected: contains regular expression \"Ow, I am slain\"");
-}
-
-TEST(MatcherDeathTest, PolymorphicMatcherMatches) {
-  EXPECT_DEATH(DieWithMessage("The rest is silence."),
-               ContainsRegex("rest is silence"));
-}
-
-TEST(MatcherDeathTest, PolymorphicMatcherDoesNotMatch) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("The rest is silence."),
-                   ContainsRegex("rest is science")),
-      "Expected: contains regular expression \"rest is science\"");
-}
-
-}  // namespace
-
-#else  // !GTEST_HAS_DEATH_TEST follows
-
-namespace {
-
-using testing::internal::CaptureStderr;
-using testing::internal::GetCapturedStderr;
-
-// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED are still
-// defined but do not trigger failures when death tests are not available on
-// the system.
-TEST(ConditionalDeathMacrosTest, WarnsWhenDeathTestsNotAvailable) {
-  // Empty statement will not crash, but that should not trigger a failure
-  // when death tests are not supported.
-  CaptureStderr();
-  EXPECT_DEATH_IF_SUPPORTED(;, "");
-  std::string output = GetCapturedStderr();
-  ASSERT_TRUE(NULL != strstr(output.c_str(),
-                             "Death tests are not supported on this platform"));
-  ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
-
-  // The streamed message should not be printed as there is no test failure.
-  CaptureStderr();
-  EXPECT_DEATH_IF_SUPPORTED(;, "") << "streamed message";
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
-
-  CaptureStderr();
-  ASSERT_DEATH_IF_SUPPORTED(;, "");  // NOLINT
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL != strstr(output.c_str(),
-                             "Death tests are not supported on this platform"));
-  ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
-
-  CaptureStderr();
-  ASSERT_DEATH_IF_SUPPORTED(;, "") << "streamed message";  // NOLINT
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
-}
-
-void FuncWithAssert(int* n) {
-  ASSERT_DEATH_IF_SUPPORTED(return;, "");
-  (*n)++;
-}
-
-// Tests that ASSERT_DEATH_IF_SUPPORTED does not return from the current
-// function (as ASSERT_DEATH does) if death tests are not supported.
-TEST(ConditionalDeathMacrosTest, AssertDeatDoesNotReturnhIfUnsupported) {
-  int n = 0;
-  FuncWithAssert(&n);
-  EXPECT_EQ(1, n);
-}
-
-}  // namespace
-
-#endif  // !GTEST_HAS_DEATH_TEST
-
-namespace {
-
-// The following code intentionally tests a suboptimal syntax.
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdangling-else"
-#pragma GCC diagnostic ignored "-Wempty-body"
-#pragma GCC diagnostic ignored "-Wpragmas"
-#endif
-// Tests that the death test macros expand to code which may or may not
-// be followed by operator<<, and that in either case the complete text
-// comprises only a single C++ statement.
-//
-// The syntax should work whether death tests are available or not.
-TEST(ConditionalDeathMacrosSyntaxDeathTest, SingleStatement) {
-  if (AlwaysFalse())
-    // This would fail if executed; this is a compilation test only
-    ASSERT_DEATH_IF_SUPPORTED(return, "");
-
-  if (AlwaysTrue())
-    EXPECT_DEATH_IF_SUPPORTED(_exit(1), "");
-  else
-    // This empty "else" branch is meant to ensure that EXPECT_DEATH
-    // doesn't expand into an "if" statement without an "else"
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_DEATH_IF_SUPPORTED(return, "") << "did not die";
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << 1 << 2 << 3;
-}
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-// Tests that conditional death test macros expand to code which interacts
-// well with switch statements.
-TEST(ConditionalDeathMacrosSyntaxDeathTest, SwitchStatement) {
-  // Microsoft compiler usually complains about switch statements without
-  // case labels. We suppress that warning for this test.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4065)
-
-  switch (0)
-    default:
-      ASSERT_DEATH_IF_SUPPORTED(_exit(1), "")
-          << "exit in default switch handler";
-
-  switch (0)
-    case 0:
-      EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << "exit in switch case";
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-}
-
-// Tests that a test case whose name ends with "DeathTest" works fine
-// on Windows.
-TEST(NotADeathTest, Test) {
-  SUCCEED();
-}
-
-}  // namespace
diff --git a/third_party/googletest/googletest/test/googletest-death-test_ex_test.cc b/third_party/googletest/googletest/test/googletest-death-test_ex_test.cc
deleted file mode 100644
index 7219680..0000000
--- a/third_party/googletest/googletest/test/googletest-death-test_ex_test.cc
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests that verify interaction of exceptions and death tests.
-
-#include "gtest/gtest-death-test.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_HAS_SEH
-#  include <windows.h>          // For RaiseException().
-# endif
-
-# include "gtest/gtest-spi.h"
-
-# if GTEST_HAS_EXCEPTIONS
-
-#  include <exception>  // For std::exception.
-
-// Tests that death tests report thrown exceptions as failures and that the
-// exceptions do not escape death test macros.
-TEST(CxxExceptionDeathTest, ExceptionIsFailure) {
-  try {
-    EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw 1, ""), "threw an exception");
-  } catch (...) {  // NOLINT
-    FAIL() << "An exception escaped a death test macro invocation "
-           << "with catch_exceptions "
-           << (testing::GTEST_FLAG(catch_exceptions) ? "enabled" : "disabled");
-  }
-}
-
-class TestException : public std::exception {
- public:
-  const char* what() const noexcept override { return "exceptional message"; }
-};
-
-TEST(CxxExceptionDeathTest, PrintsMessageForStdExceptions) {
-  // Verifies that the exception message is quoted in the failure text.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw TestException(), ""),
-                          "exceptional message");
-  // Verifies that the location is mentioned in the failure text.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw TestException(), ""),
-                          __FILE__);
-}
-# endif  // GTEST_HAS_EXCEPTIONS
-
-# if GTEST_HAS_SEH
-// Tests that enabling interception of SEH exceptions with the
-// catch_exceptions flag does not interfere with SEH exceptions being
-// treated as death by death tests.
-TEST(SehExceptionDeasTest, CatchExceptionsDoesNotInterfere) {
-  EXPECT_DEATH(RaiseException(42, 0x0, 0, NULL), "")
-      << "with catch_exceptions "
-      << (testing::GTEST_FLAG(catch_exceptions) ? "enabled" : "disabled");
-}
-# endif
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::GTEST_FLAG(catch_exceptions) = GTEST_ENABLE_CATCH_EXCEPTIONS_ != 0;
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-env-var-test.py b/third_party/googletest/googletest/test/googletest-env-var-test.py
deleted file mode 100755
index 02c3655..0000000
--- a/third_party/googletest/googletest/test/googletest-env-var-test.py
+++ /dev/null
@@ -1,120 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test correctly parses environment variables."""
-
-import os
-import gtest_test_utils
-
-
-IS_WINDOWS = os.name == 'nt'
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-env-var-test_')
-
-environ = os.environ.copy()
-
-
-def AssertEq(expected, actual):
-  if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
-    raise AssertionError
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def GetFlag(flag):
-  """Runs googletest-env-var-test_ and returns its output."""
-
-  args = [COMMAND]
-  if flag is not None:
-    args += [flag]
-  return gtest_test_utils.Subprocess(args, env=environ).output
-
-
-def TestFlag(flag, test_val, default_val):
-  """Verifies that the given flag is affected by the corresponding env var."""
-
-  env_var = 'GTEST_' + flag.upper()
-  SetEnvVar(env_var, test_val)
-  AssertEq(test_val, GetFlag(flag))
-  SetEnvVar(env_var, None)
-  AssertEq(default_val, GetFlag(flag))
-
-
-class GTestEnvVarTest(gtest_test_utils.TestCase):
-
-  def testEnvVarAffectsFlag(self):
-    """Tests that environment variable should affect the corresponding flag."""
-
-    TestFlag('break_on_failure', '1', '0')
-    TestFlag('color', 'yes', 'auto')
-    SetEnvVar('TESTBRIDGE_TEST_RUNNER_FAIL_FAST', None)  # For 'fail_fast' test
-    TestFlag('fail_fast', '1', '0')
-    TestFlag('filter', 'FooTest.Bar', '*')
-    SetEnvVar('XML_OUTPUT_FILE', None)  # For 'output' test
-    TestFlag('output', 'xml:tmp/foo.xml', '')
-    TestFlag('brief', '1', '0')
-    TestFlag('print_time', '0', '1')
-    TestFlag('repeat', '999', '1')
-    TestFlag('throw_on_failure', '1', '0')
-    TestFlag('death_test_style', 'threadsafe', 'fast')
-    TestFlag('catch_exceptions', '0', '1')
-
-    if IS_LINUX:
-      TestFlag('death_test_use_fork', '1', '0')
-      TestFlag('stack_trace_depth', '0', '100')
-
-
-  def testXmlOutputFile(self):
-    """Tests that $XML_OUTPUT_FILE affects the output flag."""
-
-    SetEnvVar('GTEST_OUTPUT', None)
-    SetEnvVar('XML_OUTPUT_FILE', 'tmp/bar.xml')
-    AssertEq('xml:tmp/bar.xml', GetFlag('output'))
-
-  def testXmlOutputFileOverride(self):
-    """Tests that $XML_OUTPUT_FILE is overridden by $GTEST_OUTPUT."""
-
-    SetEnvVar('GTEST_OUTPUT', 'xml:tmp/foo.xml')
-    SetEnvVar('XML_OUTPUT_FILE', 'tmp/bar.xml')
-    AssertEq('xml:tmp/foo.xml', GetFlag('output'))
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-env-var-test_.cc b/third_party/googletest/googletest/test/googletest-env-var-test_.cc
deleted file mode 100644
index 52f9586..0000000
--- a/third_party/googletest/googletest/test/googletest-env-var-test_.cc
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// A helper program for testing that Google Test parses the environment
-// variables correctly.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-using ::std::cout;
-
-namespace testing {
-
-// The purpose of this is to make the test more realistic by ensuring
-// that the UnitTest singleton is created before main() is entered.
-// We don't actual run the TEST itself.
-TEST(GTestEnvVarTest, Dummy) {
-}
-
-void PrintFlag(const char* flag) {
-  if (strcmp(flag, "break_on_failure") == 0) {
-    cout << GTEST_FLAG(break_on_failure);
-    return;
-  }
-
-  if (strcmp(flag, "catch_exceptions") == 0) {
-    cout << GTEST_FLAG(catch_exceptions);
-    return;
-  }
-
-  if (strcmp(flag, "color") == 0) {
-    cout << GTEST_FLAG(color);
-    return;
-  }
-
-  if (strcmp(flag, "death_test_style") == 0) {
-    cout << GTEST_FLAG(death_test_style);
-    return;
-  }
-
-  if (strcmp(flag, "death_test_use_fork") == 0) {
-    cout << GTEST_FLAG(death_test_use_fork);
-    return;
-  }
-
-  if (strcmp(flag, "fail_fast") == 0) {
-    cout << GTEST_FLAG(fail_fast);
-    return;
-  }
-
-  if (strcmp(flag, "filter") == 0) {
-    cout << GTEST_FLAG(filter);
-    return;
-  }
-
-  if (strcmp(flag, "output") == 0) {
-    cout << GTEST_FLAG(output);
-    return;
-  }
-
-  if (strcmp(flag, "brief") == 0) {
-    cout << GTEST_FLAG(brief);
-    return;
-  }
-
-  if (strcmp(flag, "print_time") == 0) {
-    cout << GTEST_FLAG(print_time);
-    return;
-  }
-
-  if (strcmp(flag, "repeat") == 0) {
-    cout << GTEST_FLAG(repeat);
-    return;
-  }
-
-  if (strcmp(flag, "stack_trace_depth") == 0) {
-    cout << GTEST_FLAG(stack_trace_depth);
-    return;
-  }
-
-  if (strcmp(flag, "throw_on_failure") == 0) {
-    cout << GTEST_FLAG(throw_on_failure);
-    return;
-  }
-
-  cout << "Invalid flag name " << flag
-       << ".  Valid names are break_on_failure, color, filter, etc.\n";
-  exit(1);
-}
-
-}  // namespace testing
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  if (argc != 2) {
-    cout << "Usage: googletest-env-var-test_ NAME_OF_FLAG\n";
-    return 1;
-  }
-
-  testing::PrintFlag(argv[1]);
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/googletest-failfast-unittest.py b/third_party/googletest/googletest/test/googletest-failfast-unittest.py
deleted file mode 100755
index 3aeb2df..0000000
--- a/third_party/googletest/googletest/test/googletest-failfast-unittest.py
+++ /dev/null
@@ -1,410 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2020 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test fail_fast.
-
-A user can specify if a Google Test program should continue test execution
-after a test failure via the GTEST_FAIL_FAST environment variable or the
---gtest_fail_fast flag. The default value of the flag can also be changed
-by Bazel fail fast environment variable TESTBRIDGE_TEST_RUNNER_FAIL_FAST.
-
-This script tests such functionality by invoking googletest-failfast-unittest_
-(a program written with Google Test) with different environments and command
-line flags.
-"""
-
-import os
-import gtest_test_utils
-
-# Constants.
-
-# Bazel testbridge environment variable for fail fast
-BAZEL_FAIL_FAST_ENV_VAR = 'TESTBRIDGE_TEST_RUNNER_FAIL_FAST'
-
-# The environment variable for specifying fail fast.
-FAIL_FAST_ENV_VAR = 'GTEST_FAIL_FAST'
-
-# The command line flag for specifying fail fast.
-FAIL_FAST_FLAG = 'gtest_fail_fast'
-
-# The command line flag to run disabled tests.
-RUN_DISABLED_FLAG = 'gtest_also_run_disabled_tests'
-
-# The command line flag for specifying a filter.
-FILTER_FLAG = 'gtest_filter'
-
-# Command to run the googletest-failfast-unittest_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath(
-    'googletest-failfast-unittest_')
-
-# The command line flag to tell Google Test to output the list of tests it
-# will run.
-LIST_TESTS_FLAG = '--gtest_list_tests'
-
-# Indicates whether Google Test supports death tests.
-SUPPORTS_DEATH_TESTS = 'HasDeathTest' in gtest_test_utils.Subprocess(
-    [COMMAND, LIST_TESTS_FLAG]).output
-
-# Utilities.
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def RunAndReturnOutput(test_suite=None, fail_fast=None, run_disabled=False):
-  """Runs the test program and returns its output."""
-
-  args = []
-  xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                          '.GTestFailFastUnitTest.xml')
-  args += ['--gtest_output=xml:' + xml_path]
-  if fail_fast is not None:
-    if isinstance(fail_fast, str):
-      args += ['--%s=%s' % (FAIL_FAST_FLAG, fail_fast)]
-    elif fail_fast:
-      args += ['--%s' % FAIL_FAST_FLAG]
-    else:
-      args += ['--no%s' % FAIL_FAST_FLAG]
-  if test_suite:
-    args += ['--%s=%s.*' % (FILTER_FLAG, test_suite)]
-  if run_disabled:
-    args += ['--%s' % RUN_DISABLED_FLAG]
-  txt_out = gtest_test_utils.Subprocess([COMMAND] + args, env=environ).output
-  with open(xml_path) as xml_file:
-    return txt_out, xml_file.read()
-
-
-# The unit test.
-class GTestFailFastUnitTest(gtest_test_utils.TestCase):
-  """Tests the env variable or the command line flag for fail_fast."""
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of not specifying the fail_fast."""
-
-    txt, _ = RunAndReturnOutput()
-    self.assertIn('22 FAILED TEST', txt)
-
-  def testGoogletestFlag(self):
-    txt, _ = RunAndReturnOutput(test_suite='HasSimpleTest', fail_fast=True)
-    self.assertIn('1 FAILED TEST', txt)
-    self.assertIn('[  SKIPPED ] 3 tests', txt)
-
-    txt, _ = RunAndReturnOutput(test_suite='HasSimpleTest', fail_fast=False)
-    self.assertIn('4 FAILED TEST', txt)
-    self.assertNotIn('[  SKIPPED ]', txt)
-
-  def testGoogletestEnvVar(self):
-    """Tests the behavior of specifying fail_fast via Googletest env var."""
-
-    try:
-      SetEnvVar(FAIL_FAST_ENV_VAR, '1')
-      txt, _ = RunAndReturnOutput('HasSimpleTest')
-      self.assertIn('1 FAILED TEST', txt)
-      self.assertIn('[  SKIPPED ] 3 tests', txt)
-
-      SetEnvVar(FAIL_FAST_ENV_VAR, '0')
-      txt, _ = RunAndReturnOutput('HasSimpleTest')
-      self.assertIn('4 FAILED TEST', txt)
-      self.assertNotIn('[  SKIPPED ]', txt)
-    finally:
-      SetEnvVar(FAIL_FAST_ENV_VAR, None)
-
-  def testBazelEnvVar(self):
-    """Tests the behavior of specifying fail_fast via Bazel testbridge."""
-
-    try:
-      SetEnvVar(BAZEL_FAIL_FAST_ENV_VAR, '1')
-      txt, _ = RunAndReturnOutput('HasSimpleTest')
-      self.assertIn('1 FAILED TEST', txt)
-      self.assertIn('[  SKIPPED ] 3 tests', txt)
-
-      SetEnvVar(BAZEL_FAIL_FAST_ENV_VAR, '0')
-      txt, _ = RunAndReturnOutput('HasSimpleTest')
-      self.assertIn('4 FAILED TEST', txt)
-      self.assertNotIn('[  SKIPPED ]', txt)
-    finally:
-      SetEnvVar(BAZEL_FAIL_FAST_ENV_VAR, None)
-
-  def testFlagOverridesEnvVar(self):
-    """Tests precedence of flag over env var."""
-
-    try:
-      SetEnvVar(FAIL_FAST_ENV_VAR, '0')
-      txt, _ = RunAndReturnOutput('HasSimpleTest', True)
-      self.assertIn('1 FAILED TEST', txt)
-      self.assertIn('[  SKIPPED ] 3 tests', txt)
-    finally:
-      SetEnvVar(FAIL_FAST_ENV_VAR, None)
-
-  def testGoogletestEnvVarOverridesBazelEnvVar(self):
-    """Tests that the Googletest native env var over Bazel testbridge."""
-
-    try:
-      SetEnvVar(BAZEL_FAIL_FAST_ENV_VAR, '0')
-      SetEnvVar(FAIL_FAST_ENV_VAR, '1')
-      txt, _ = RunAndReturnOutput('HasSimpleTest')
-      self.assertIn('1 FAILED TEST', txt)
-      self.assertIn('[  SKIPPED ] 3 tests', txt)
-    finally:
-      SetEnvVar(FAIL_FAST_ENV_VAR, None)
-      SetEnvVar(BAZEL_FAIL_FAST_ENV_VAR, None)
-
-  def testEventListener(self):
-    txt, _ = RunAndReturnOutput(test_suite='HasSkipTest', fail_fast=True)
-    self.assertIn('1 FAILED TEST', txt)
-    self.assertIn('[  SKIPPED ] 3 tests', txt)
-    for expected_count, callback in [(1, 'OnTestSuiteStart'),
-                                     (5, 'OnTestStart'),
-                                     (5, 'OnTestEnd'),
-                                     (5, 'OnTestPartResult'),
-                                     (1, 'OnTestSuiteEnd')]:
-      self.assertEqual(
-          expected_count, txt.count(callback),
-          'Expected %d calls to callback %s match count on output: %s ' %
-          (expected_count, callback, txt))
-
-    txt, _ = RunAndReturnOutput(test_suite='HasSkipTest', fail_fast=False)
-    self.assertIn('3 FAILED TEST', txt)
-    self.assertIn('[  SKIPPED ] 1 test', txt)
-    for expected_count, callback in [(1, 'OnTestSuiteStart'),
-                                     (5, 'OnTestStart'),
-                                     (5, 'OnTestEnd'),
-                                     (5, 'OnTestPartResult'),
-                                     (1, 'OnTestSuiteEnd')]:
-      self.assertEqual(
-          expected_count, txt.count(callback),
-          'Expected %d calls to callback %s match count on output: %s ' %
-          (expected_count, callback, txt))
-
-  def assertXmlResultCount(self, result, count, xml):
-    self.assertEqual(
-        count, xml.count('result="%s"' % result),
-        'Expected \'result="%s"\' match count of %s: %s ' %
-        (result, count, xml))
-
-  def assertXmlStatusCount(self, status, count, xml):
-    self.assertEqual(
-        count, xml.count('status="%s"' % status),
-        'Expected \'status="%s"\' match count of %s: %s ' %
-        (status, count, xml))
-
-  def assertFailFastXmlAndTxtOutput(self,
-                                    fail_fast,
-                                    test_suite,
-                                    passed_count,
-                                    failure_count,
-                                    skipped_count,
-                                    suppressed_count,
-                                    run_disabled=False):
-    """Assert XML and text output of a test execution."""
-
-    txt, xml = RunAndReturnOutput(test_suite, fail_fast, run_disabled)
-    if failure_count > 0:
-      self.assertIn('%s FAILED TEST' % failure_count, txt)
-    if suppressed_count > 0:
-      self.assertIn('%s DISABLED TEST' % suppressed_count, txt)
-    if skipped_count > 0:
-      self.assertIn('[  SKIPPED ] %s tests' % skipped_count, txt)
-    self.assertXmlStatusCount('run',
-                              passed_count + failure_count + skipped_count, xml)
-    self.assertXmlStatusCount('notrun', suppressed_count, xml)
-    self.assertXmlResultCount('completed', passed_count + failure_count, xml)
-    self.assertXmlResultCount('skipped', skipped_count, xml)
-    self.assertXmlResultCount('suppressed', suppressed_count, xml)
-
-  def assertFailFastBehavior(self,
-                             test_suite,
-                             passed_count,
-                             failure_count,
-                             skipped_count,
-                             suppressed_count,
-                             run_disabled=False):
-    """Assert --fail_fast via flag."""
-
-    for fail_fast in ('true', '1', 't', True):
-      self.assertFailFastXmlAndTxtOutput(fail_fast, test_suite, passed_count,
-                                         failure_count, skipped_count,
-                                         suppressed_count, run_disabled)
-
-  def assertNotFailFastBehavior(self,
-                                test_suite,
-                                passed_count,
-                                failure_count,
-                                skipped_count,
-                                suppressed_count,
-                                run_disabled=False):
-    """Assert --nofail_fast via flag."""
-
-    for fail_fast in ('false', '0', 'f', False):
-      self.assertFailFastXmlAndTxtOutput(fail_fast, test_suite, passed_count,
-                                         failure_count, skipped_count,
-                                         suppressed_count, run_disabled)
-
-  def testFlag_HasFixtureTest(self):
-    """Tests the behavior of fail_fast and TEST_F."""
-    self.assertFailFastBehavior(
-        test_suite='HasFixtureTest',
-        passed_count=1,
-        failure_count=1,
-        skipped_count=3,
-        suppressed_count=0)
-    self.assertNotFailFastBehavior(
-        test_suite='HasFixtureTest',
-        passed_count=1,
-        failure_count=4,
-        skipped_count=0,
-        suppressed_count=0)
-
-  def testFlag_HasSimpleTest(self):
-    """Tests the behavior of fail_fast and TEST."""
-    self.assertFailFastBehavior(
-        test_suite='HasSimpleTest',
-        passed_count=1,
-        failure_count=1,
-        skipped_count=3,
-        suppressed_count=0)
-    self.assertNotFailFastBehavior(
-        test_suite='HasSimpleTest',
-        passed_count=1,
-        failure_count=4,
-        skipped_count=0,
-        suppressed_count=0)
-
-  def testFlag_HasParametersTest(self):
-    """Tests the behavior of fail_fast and TEST_P."""
-    self.assertFailFastBehavior(
-        test_suite='HasParametersSuite/HasParametersTest',
-        passed_count=0,
-        failure_count=1,
-        skipped_count=3,
-        suppressed_count=0)
-    self.assertNotFailFastBehavior(
-        test_suite='HasParametersSuite/HasParametersTest',
-        passed_count=0,
-        failure_count=4,
-        skipped_count=0,
-        suppressed_count=0)
-
-  def testFlag_HasDisabledTest(self):
-    """Tests the behavior of fail_fast and Disabled test cases."""
-    self.assertFailFastBehavior(
-        test_suite='HasDisabledTest',
-        passed_count=1,
-        failure_count=1,
-        skipped_count=2,
-        suppressed_count=1,
-        run_disabled=False)
-    self.assertNotFailFastBehavior(
-        test_suite='HasDisabledTest',
-        passed_count=1,
-        failure_count=3,
-        skipped_count=0,
-        suppressed_count=1,
-        run_disabled=False)
-
-  def testFlag_HasDisabledRunDisabledTest(self):
-    """Tests the behavior of fail_fast and Disabled test cases enabled."""
-    self.assertFailFastBehavior(
-        test_suite='HasDisabledTest',
-        passed_count=1,
-        failure_count=1,
-        skipped_count=3,
-        suppressed_count=0,
-        run_disabled=True)
-    self.assertNotFailFastBehavior(
-        test_suite='HasDisabledTest',
-        passed_count=1,
-        failure_count=4,
-        skipped_count=0,
-        suppressed_count=0,
-        run_disabled=True)
-
-  def testFlag_HasDisabledSuiteTest(self):
-    """Tests the behavior of fail_fast and Disabled test suites."""
-    self.assertFailFastBehavior(
-        test_suite='DISABLED_HasDisabledSuite',
-        passed_count=0,
-        failure_count=0,
-        skipped_count=0,
-        suppressed_count=5,
-        run_disabled=False)
-    self.assertNotFailFastBehavior(
-        test_suite='DISABLED_HasDisabledSuite',
-        passed_count=0,
-        failure_count=0,
-        skipped_count=0,
-        suppressed_count=5,
-        run_disabled=False)
-
-  def testFlag_HasDisabledSuiteRunDisabledTest(self):
-    """Tests the behavior of fail_fast and Disabled test suites enabled."""
-    self.assertFailFastBehavior(
-        test_suite='DISABLED_HasDisabledSuite',
-        passed_count=1,
-        failure_count=1,
-        skipped_count=3,
-        suppressed_count=0,
-        run_disabled=True)
-    self.assertNotFailFastBehavior(
-        test_suite='DISABLED_HasDisabledSuite',
-        passed_count=1,
-        failure_count=4,
-        skipped_count=0,
-        suppressed_count=0,
-        run_disabled=True)
-
-  if SUPPORTS_DEATH_TESTS:
-
-    def testFlag_HasDeathTest(self):
-      """Tests the behavior of fail_fast and death tests."""
-      self.assertFailFastBehavior(
-          test_suite='HasDeathTest',
-          passed_count=1,
-          failure_count=1,
-          skipped_count=3,
-          suppressed_count=0)
-      self.assertNotFailFastBehavior(
-          test_suite='HasDeathTest',
-          passed_count=1,
-          failure_count=4,
-          skipped_count=0,
-          suppressed_count=0)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-failfast-unittest_.cc b/third_party/googletest/googletest/test/googletest-failfast-unittest_.cc
deleted file mode 100644
index 0b2c951..0000000
--- a/third_party/googletest/googletest/test/googletest-failfast-unittest_.cc
+++ /dev/null
@@ -1,167 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test test filters.
-//
-// A user can specify which test(s) in a Google Test program to run via
-// either the GTEST_FILTER environment variable or the --gtest_filter
-// flag.  This is used for testing such functionality.
-//
-// The program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-// Test HasFixtureTest.
-
-class HasFixtureTest : public testing::Test {};
-
-TEST_F(HasFixtureTest, Test0) {}
-
-TEST_F(HasFixtureTest, Test1) { FAIL() << "Expected failure."; }
-
-TEST_F(HasFixtureTest, Test2) { FAIL() << "Expected failure."; }
-
-TEST_F(HasFixtureTest, Test3) { FAIL() << "Expected failure."; }
-
-TEST_F(HasFixtureTest, Test4) { FAIL() << "Expected failure."; }
-
-// Test HasSimpleTest.
-
-TEST(HasSimpleTest, Test0) {}
-
-TEST(HasSimpleTest, Test1) { FAIL() << "Expected failure."; }
-
-TEST(HasSimpleTest, Test2) { FAIL() << "Expected failure."; }
-
-TEST(HasSimpleTest, Test3) { FAIL() << "Expected failure."; }
-
-TEST(HasSimpleTest, Test4) { FAIL() << "Expected failure."; }
-
-// Test HasDisabledTest.
-
-TEST(HasDisabledTest, Test0) {}
-
-TEST(HasDisabledTest, DISABLED_Test1) { FAIL() << "Expected failure."; }
-
-TEST(HasDisabledTest, Test2) { FAIL() << "Expected failure."; }
-
-TEST(HasDisabledTest, Test3) { FAIL() << "Expected failure."; }
-
-TEST(HasDisabledTest, Test4) { FAIL() << "Expected failure."; }
-
-// Test HasDeathTest
-
-TEST(HasDeathTest, Test0) { EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*"); }
-
-TEST(HasDeathTest, Test1) {
-  EXPECT_DEATH_IF_SUPPORTED(FAIL() << "Expected failure.", ".*");
-}
-
-TEST(HasDeathTest, Test2) {
-  EXPECT_DEATH_IF_SUPPORTED(FAIL() << "Expected failure.", ".*");
-}
-
-TEST(HasDeathTest, Test3) {
-  EXPECT_DEATH_IF_SUPPORTED(FAIL() << "Expected failure.", ".*");
-}
-
-TEST(HasDeathTest, Test4) {
-  EXPECT_DEATH_IF_SUPPORTED(FAIL() << "Expected failure.", ".*");
-}
-
-// Test DISABLED_HasDisabledSuite
-
-TEST(DISABLED_HasDisabledSuite, Test0) {}
-
-TEST(DISABLED_HasDisabledSuite, Test1) { FAIL() << "Expected failure."; }
-
-TEST(DISABLED_HasDisabledSuite, Test2) { FAIL() << "Expected failure."; }
-
-TEST(DISABLED_HasDisabledSuite, Test3) { FAIL() << "Expected failure."; }
-
-TEST(DISABLED_HasDisabledSuite, Test4) { FAIL() << "Expected failure."; }
-
-// Test HasParametersTest
-
-class HasParametersTest : public testing::TestWithParam<int> {};
-
-TEST_P(HasParametersTest, Test1) { FAIL() << "Expected failure."; }
-
-TEST_P(HasParametersTest, Test2) { FAIL() << "Expected failure."; }
-
-INSTANTIATE_TEST_SUITE_P(HasParametersSuite, HasParametersTest,
-                         testing::Values(1, 2));
-
-class MyTestListener : public ::testing::EmptyTestEventListener {
-  void OnTestSuiteStart(const ::testing::TestSuite& test_suite) override {
-    printf("We are in OnTestSuiteStart of %s.\n", test_suite.name());
-  }
-
-  void OnTestStart(const ::testing::TestInfo& test_info) override {
-    printf("We are in OnTestStart of %s.%s.\n", test_info.test_suite_name(),
-           test_info.name());
-  }
-
-  void OnTestPartResult(
-      const ::testing::TestPartResult& test_part_result) override {
-    printf("We are in OnTestPartResult %s:%d.\n", test_part_result.file_name(),
-           test_part_result.line_number());
-  }
-
-  void OnTestEnd(const ::testing::TestInfo& test_info) override {
-    printf("We are in OnTestEnd of %s.%s.\n", test_info.test_suite_name(),
-           test_info.name());
-  }
-
-  void OnTestSuiteEnd(const ::testing::TestSuite& test_suite) override {
-    printf("We are in OnTestSuiteEnd of %s.\n", test_suite.name());
-  }
-};
-
-TEST(HasSkipTest, Test0) { SUCCEED() << "Expected success."; }
-
-TEST(HasSkipTest, Test1) { GTEST_SKIP() << "Expected skip."; }
-
-TEST(HasSkipTest, Test2) { FAIL() << "Expected failure."; }
-
-TEST(HasSkipTest, Test3) { FAIL() << "Expected failure."; }
-
-TEST(HasSkipTest, Test4) { FAIL() << "Expected failure."; }
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  ::testing::UnitTest::GetInstance()->listeners().Append(new MyTestListener());
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-filepath-test.cc b/third_party/googletest/googletest/test/googletest-filepath-test.cc
deleted file mode 100644
index aafad36..0000000
--- a/third_party/googletest/googletest/test/googletest-filepath-test.cc
+++ /dev/null
@@ -1,649 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This file tests classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included from gtest-internal.h.
-// Do not #include this file anywhere else!
-
-#include "gtest/internal/gtest-filepath.h"
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>  // NOLINT
-#elif GTEST_OS_WINDOWS
-# include <direct.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-namespace testing {
-namespace internal {
-namespace {
-
-#if GTEST_OS_WINDOWS_MOBILE
-
-// Windows CE doesn't have the remove C function.
-int remove(const char* path) {
-  LPCWSTR wpath = String::AnsiToUtf16(path);
-  int ret = DeleteFile(wpath) ? 0 : -1;
-  delete [] wpath;
-  return ret;
-}
-// Windows CE doesn't have the _rmdir C function.
-int _rmdir(const char* path) {
-  FilePath filepath(path);
-  LPCWSTR wpath = String::AnsiToUtf16(
-      filepath.RemoveTrailingPathSeparator().c_str());
-  int ret = RemoveDirectory(wpath) ? 0 : -1;
-  delete [] wpath;
-  return ret;
-}
-
-#else
-
-TEST(GetCurrentDirTest, ReturnsCurrentDir) {
-  const FilePath original_dir = FilePath::GetCurrentDir();
-  EXPECT_FALSE(original_dir.IsEmpty());
-
-  posix::ChDir(GTEST_PATH_SEP_);
-  const FilePath cwd = FilePath::GetCurrentDir();
-  posix::ChDir(original_dir.c_str());
-
-# if GTEST_OS_WINDOWS || GTEST_OS_OS2
-
-  // Skips the ":".
-  const char* const cwd_without_drive = strchr(cwd.c_str(), ':');
-  ASSERT_TRUE(cwd_without_drive != NULL);
-  EXPECT_STREQ(GTEST_PATH_SEP_, cwd_without_drive + 1);
-
-# else
-
-  EXPECT_EQ(GTEST_PATH_SEP_, cwd.string());
-
-# endif
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-TEST(IsEmptyTest, ReturnsTrueForEmptyPath) {
-  EXPECT_TRUE(FilePath("").IsEmpty());
-}
-
-TEST(IsEmptyTest, ReturnsFalseForNonEmptyPath) {
-  EXPECT_FALSE(FilePath("a").IsEmpty());
-  EXPECT_FALSE(FilePath(".").IsEmpty());
-  EXPECT_FALSE(FilePath("a/b").IsEmpty());
-  EXPECT_FALSE(FilePath("a\\b\\").IsEmpty());
-}
-
-// RemoveDirectoryName "" -> ""
-TEST(RemoveDirectoryNameTest, WhenEmptyName) {
-  EXPECT_EQ("", FilePath("").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ButNoDirectory) {
-  EXPECT_EQ("afile",
-      FilePath("afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, RootFileShouldGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath(GTEST_PATH_SEP_ "afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/" -> ""
-TEST(RemoveDirectoryNameTest, WhereThereIsNoFileName) {
-  EXPECT_EQ("",
-      FilePath("adir" GTEST_PATH_SEP_).RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath("adir" GTEST_PATH_SEP_ "afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/subdir/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldAlsoGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_ "afile")
-      .RemoveDirectoryName().string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that RemoveDirectoryName() works with the alternate separator
-// on Windows.
-
-// RemoveDirectoryName("/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, RootFileShouldGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile", FilePath("/afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/") -> ""
-TEST(RemoveDirectoryNameTest, WhereThereIsNoFileNameForAlternateSeparator) {
-  EXPECT_EQ("", FilePath("adir/").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile", FilePath("adir/afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/subdir/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldAlsoGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile",
-            FilePath("adir/subdir/afile").RemoveDirectoryName().string());
-}
-
-#endif
-
-// RemoveFileName "" -> "./"
-TEST(RemoveFileNameTest, EmptyName) {
-#if GTEST_OS_WINDOWS_MOBILE
-  // On Windows CE, we use the root as the current directory.
-  EXPECT_EQ(GTEST_PATH_SEP_, FilePath("").RemoveFileName().string());
-#else
-  EXPECT_EQ("." GTEST_PATH_SEP_, FilePath("").RemoveFileName().string());
-#endif
-}
-
-// RemoveFileName "adir/" -> "adir/"
-TEST(RemoveFileNameTest, ButNoFile) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-      FilePath("adir" GTEST_PATH_SEP_).RemoveFileName().string());
-}
-
-// RemoveFileName "adir/afile" -> "adir/"
-TEST(RemoveFileNameTest, GivesDirName) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir" GTEST_PATH_SEP_ "afile").RemoveFileName().string());
-}
-
-// RemoveFileName "adir/subdir/afile" -> "adir/subdir/"
-TEST(RemoveFileNameTest, GivesDirAndSubDirName) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_,
-      FilePath("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_ "afile")
-      .RemoveFileName().string());
-}
-
-// RemoveFileName "/afile" -> "/"
-TEST(RemoveFileNameTest, GivesRootDir) {
-  EXPECT_EQ(GTEST_PATH_SEP_,
-      FilePath(GTEST_PATH_SEP_ "afile").RemoveFileName().string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that RemoveFileName() works with the alternate separator on
-// Windows.
-
-// RemoveFileName("adir/") -> "adir/"
-TEST(RemoveFileNameTest, ButNoFileForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir/").RemoveFileName().string());
-}
-
-// RemoveFileName("adir/afile") -> "adir/"
-TEST(RemoveFileNameTest, GivesDirNameForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir/afile").RemoveFileName().string());
-}
-
-// RemoveFileName("adir/subdir/afile") -> "adir/subdir/"
-TEST(RemoveFileNameTest, GivesDirAndSubDirNameForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_,
-            FilePath("adir/subdir/afile").RemoveFileName().string());
-}
-
-// RemoveFileName("/afile") -> "\"
-TEST(RemoveFileNameTest, GivesRootDirForAlternateSeparator) {
-  EXPECT_EQ(GTEST_PATH_SEP_, FilePath("/afile").RemoveFileName().string());
-}
-
-#endif
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo"), FilePath("bar"),
-      0, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameNumberGtZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo"), FilePath("bar"),
-      12, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar_12.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameWithSlashNumberIsZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar"), 0, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameWithSlashNumberGtZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar"), 12, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar_12.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsZeroAndDirIsEmpty) {
-  FilePath actual = FilePath::MakeFileName(FilePath(""), FilePath("bar"),
-      0, "xml");
-  EXPECT_EQ("bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsNotZeroAndDirIsEmpty) {
-  FilePath actual = FilePath::MakeFileName(FilePath(""), FilePath("bar"),
-      14, "xml");
-  EXPECT_EQ("bar_14.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, WorksWhenDirDoesNotEndWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, WorksWhenPath1EndsWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo" GTEST_PATH_SEP_),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, Path1BeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath(""),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, Path2BeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"), FilePath(""));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_, actual.string());
-}
-
-TEST(ConcatPathsTest, BothPathBeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath(""),
-                                          FilePath(""));
-  EXPECT_EQ("", actual.string());
-}
-
-TEST(ConcatPathsTest, Path1ContainsPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo" GTEST_PATH_SEP_ "bar"),
-                                          FilePath("foobar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_ "foobar.xml",
-            actual.string());
-}
-
-TEST(ConcatPathsTest, Path2ContainsPathSep) {
-  FilePath actual = FilePath::ConcatPaths(
-      FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar" GTEST_PATH_SEP_ "bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_ "bar.xml",
-            actual.string());
-}
-
-TEST(ConcatPathsTest, Path2EndsWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"),
-                                          FilePath("bar" GTEST_PATH_SEP_));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_, actual.string());
-}
-
-// RemoveTrailingPathSeparator "" -> ""
-TEST(RemoveTrailingPathSeparatorTest, EmptyString) {
-  EXPECT_EQ("", FilePath("").RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo" -> "foo"
-TEST(RemoveTrailingPathSeparatorTest, FileNoSlashString) {
-  EXPECT_EQ("foo", FilePath("foo").RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo/" -> "foo"
-TEST(RemoveTrailingPathSeparatorTest, ShouldRemoveTrailingSeparator) {
-  EXPECT_EQ("foo",
-      FilePath("foo" GTEST_PATH_SEP_).RemoveTrailingPathSeparator().string());
-#if GTEST_HAS_ALT_PATH_SEP_
-  EXPECT_EQ("foo", FilePath("foo/").RemoveTrailingPathSeparator().string());
-#endif
-}
-
-// RemoveTrailingPathSeparator "foo/bar/" -> "foo/bar/"
-TEST(RemoveTrailingPathSeparatorTest, ShouldRemoveLastSeparator) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_)
-                .RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo/bar" -> "foo/bar"
-TEST(RemoveTrailingPathSeparatorTest, ShouldReturnUnmodified) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar")
-                .RemoveTrailingPathSeparator().string());
-}
-
-TEST(DirectoryTest, RootDirectoryExists) {
-#if GTEST_OS_WINDOWS  // We are on Windows.
-  char current_drive[_MAX_PATH];  // NOLINT
-  current_drive[0] = static_cast<char>(_getdrive() + 'A' - 1);
-  current_drive[1] = ':';
-  current_drive[2] = '\\';
-  current_drive[3] = '\0';
-  EXPECT_TRUE(FilePath(current_drive).DirectoryExists());
-#else
-  EXPECT_TRUE(FilePath("/").DirectoryExists());
-#endif  // GTEST_OS_WINDOWS
-}
-
-#if GTEST_OS_WINDOWS
-TEST(DirectoryTest, RootOfWrongDriveDoesNotExists) {
-  const int saved_drive_ = _getdrive();
-  // Find a drive that doesn't exist. Start with 'Z' to avoid common ones.
-  for (char drive = 'Z'; drive >= 'A'; drive--)
-    if (_chdrive(drive - 'A' + 1) == -1) {
-      char non_drive[_MAX_PATH];  // NOLINT
-      non_drive[0] = drive;
-      non_drive[1] = ':';
-      non_drive[2] = '\\';
-      non_drive[3] = '\0';
-      EXPECT_FALSE(FilePath(non_drive).DirectoryExists());
-      break;
-    }
-  _chdrive(saved_drive_);
-}
-#endif  // GTEST_OS_WINDOWS
-
-#if !GTEST_OS_WINDOWS_MOBILE
-// Windows CE _does_ consider an empty directory to exist.
-TEST(DirectoryTest, EmptyPathDirectoryDoesNotExist) {
-  EXPECT_FALSE(FilePath("").DirectoryExists());
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-TEST(DirectoryTest, CurrentDirectoryExists) {
-#if GTEST_OS_WINDOWS  // We are on Windows.
-# ifndef _WIN32_CE  // Windows CE doesn't have a current directory.
-
-  EXPECT_TRUE(FilePath(".").DirectoryExists());
-  EXPECT_TRUE(FilePath(".\\").DirectoryExists());
-
-# endif  // _WIN32_CE
-#else
-  EXPECT_TRUE(FilePath(".").DirectoryExists());
-  EXPECT_TRUE(FilePath("./").DirectoryExists());
-#endif  // GTEST_OS_WINDOWS
-}
-
-// "foo/bar" == foo//bar" == "foo///bar"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsInMidstring) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_
-                     GTEST_PATH_SEP_ "bar").string());
-}
-
-// "/bar" == //bar" == "///bar"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsAtStringStart) {
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-}
-
-// "foo/" == foo//" == "foo///"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsAtStringEnd) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_).string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_).string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_ GTEST_PATH_SEP_).string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that separators at the end of the string are normalized
-// regardless of their combination (e.g. "foo\" =="foo/\" ==
-// "foo\\/").
-TEST(NormalizeTest, MixAlternateSeparatorAtStringEnd) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo/").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo" GTEST_PATH_SEP_ "/").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo//" GTEST_PATH_SEP_).string());
-}
-
-#endif
-
-TEST(AssignmentOperatorTest, DefaultAssignedToNonDefault) {
-  FilePath default_path;
-  FilePath non_default_path("path");
-  non_default_path = default_path;
-  EXPECT_EQ("", non_default_path.string());
-  EXPECT_EQ("", default_path.string());  // RHS var is unchanged.
-}
-
-TEST(AssignmentOperatorTest, NonDefaultAssignedToDefault) {
-  FilePath non_default_path("path");
-  FilePath default_path;
-  default_path = non_default_path;
-  EXPECT_EQ("path", default_path.string());
-  EXPECT_EQ("path", non_default_path.string());  // RHS var is unchanged.
-}
-
-TEST(AssignmentOperatorTest, ConstAssignedToNonConst) {
-  const FilePath const_default_path("const_path");
-  FilePath non_default_path("path");
-  non_default_path = const_default_path;
-  EXPECT_EQ("const_path", non_default_path.string());
-}
-
-class DirectoryCreationTest : public Test {
- protected:
-  void SetUp() override {
-    testdata_path_.Set(FilePath(
-        TempDir() + GetCurrentExecutableName().string() +
-        "_directory_creation" GTEST_PATH_SEP_ "test" GTEST_PATH_SEP_));
-    testdata_file_.Set(testdata_path_.RemoveTrailingPathSeparator());
-
-    unique_file0_.Set(FilePath::MakeFileName(testdata_path_, FilePath("unique"),
-        0, "txt"));
-    unique_file1_.Set(FilePath::MakeFileName(testdata_path_, FilePath("unique"),
-        1, "txt"));
-
-    remove(testdata_file_.c_str());
-    remove(unique_file0_.c_str());
-    remove(unique_file1_.c_str());
-    posix::RmDir(testdata_path_.c_str());
-  }
-
-  void TearDown() override {
-    remove(testdata_file_.c_str());
-    remove(unique_file0_.c_str());
-    remove(unique_file1_.c_str());
-    posix::RmDir(testdata_path_.c_str());
-  }
-
-  void CreateTextFile(const char* filename) {
-    FILE* f = posix::FOpen(filename, "w");
-    fprintf(f, "text\n");
-    fclose(f);
-  }
-
-  // Strings representing a directory and a file, with identical paths
-  // except for the trailing separator character that distinquishes
-  // a directory named 'test' from a file named 'test'. Example names:
-  FilePath testdata_path_;  // "/tmp/directory_creation/test/"
-  FilePath testdata_file_;  // "/tmp/directory_creation/test"
-  FilePath unique_file0_;  // "/tmp/directory_creation/test/unique.txt"
-  FilePath unique_file1_;  // "/tmp/directory_creation/test/unique_1.txt"
-};
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesRecursively) {
-  EXPECT_FALSE(testdata_path_.DirectoryExists()) << testdata_path_.string();
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-  EXPECT_TRUE(testdata_path_.DirectoryExists());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesForAlreadyExistingPath) {
-  EXPECT_FALSE(testdata_path_.DirectoryExists()) << testdata_path_.string();
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-  // Call 'create' again... should still succeed.
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesAndUniqueFilename) {
-  FilePath file_path(FilePath::GenerateUniqueFileName(testdata_path_,
-      FilePath("unique"), "txt"));
-  EXPECT_EQ(unique_file0_.string(), file_path.string());
-  EXPECT_FALSE(file_path.FileOrDirectoryExists());  // file not there
-
-  testdata_path_.CreateDirectoriesRecursively();
-  EXPECT_FALSE(file_path.FileOrDirectoryExists());  // file still not there
-  CreateTextFile(file_path.c_str());
-  EXPECT_TRUE(file_path.FileOrDirectoryExists());
-
-  FilePath file_path2(FilePath::GenerateUniqueFileName(testdata_path_,
-      FilePath("unique"), "txt"));
-  EXPECT_EQ(unique_file1_.string(), file_path2.string());
-  EXPECT_FALSE(file_path2.FileOrDirectoryExists());  // file not there
-  CreateTextFile(file_path2.c_str());
-  EXPECT_TRUE(file_path2.FileOrDirectoryExists());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesFail) {
-  // force a failure by putting a file where we will try to create a directory.
-  CreateTextFile(testdata_file_.c_str());
-  EXPECT_TRUE(testdata_file_.FileOrDirectoryExists());
-  EXPECT_FALSE(testdata_file_.DirectoryExists());
-  EXPECT_FALSE(testdata_file_.CreateDirectoriesRecursively());
-}
-
-TEST(NoDirectoryCreationTest, CreateNoDirectoriesForDefaultXmlFile) {
-  const FilePath test_detail_xml("test_detail.xml");
-  EXPECT_FALSE(test_detail_xml.CreateDirectoriesRecursively());
-}
-
-TEST(FilePathTest, DefaultConstructor) {
-  FilePath fp;
-  EXPECT_EQ("", fp.string());
-}
-
-TEST(FilePathTest, CharAndCopyConstructors) {
-  const FilePath fp("spicy");
-  EXPECT_EQ("spicy", fp.string());
-
-  const FilePath fp_copy(fp);
-  EXPECT_EQ("spicy", fp_copy.string());
-}
-
-TEST(FilePathTest, StringConstructor) {
-  const FilePath fp(std::string("cider"));
-  EXPECT_EQ("cider", fp.string());
-}
-
-TEST(FilePathTest, Set) {
-  const FilePath apple("apple");
-  FilePath mac("mac");
-  mac.Set(apple);  // Implement Set() since overloading operator= is forbidden.
-  EXPECT_EQ("apple", mac.string());
-  EXPECT_EQ("apple", apple.string());
-}
-
-TEST(FilePathTest, ToString) {
-  const FilePath file("drink");
-  EXPECT_EQ("drink", file.string());
-}
-
-TEST(FilePathTest, RemoveExtension) {
-  EXPECT_EQ("app", FilePath("app.cc").RemoveExtension("cc").string());
-  EXPECT_EQ("app", FilePath("app.exe").RemoveExtension("exe").string());
-  EXPECT_EQ("APP", FilePath("APP.EXE").RemoveExtension("exe").string());
-}
-
-TEST(FilePathTest, RemoveExtensionWhenThereIsNoExtension) {
-  EXPECT_EQ("app", FilePath("app").RemoveExtension("exe").string());
-}
-
-TEST(FilePathTest, IsDirectory) {
-  EXPECT_FALSE(FilePath("cola").IsDirectory());
-  EXPECT_TRUE(FilePath("koala" GTEST_PATH_SEP_).IsDirectory());
-#if GTEST_HAS_ALT_PATH_SEP_
-  EXPECT_TRUE(FilePath("koala/").IsDirectory());
-#endif
-}
-
-TEST(FilePathTest, IsAbsolutePath) {
-  EXPECT_FALSE(FilePath("is" GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-  EXPECT_FALSE(FilePath("").IsAbsolutePath());
-#if GTEST_OS_WINDOWS
-  EXPECT_TRUE(FilePath("c:\\" GTEST_PATH_SEP_ "is_not"
-                       GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-  EXPECT_FALSE(FilePath("c:foo" GTEST_PATH_SEP_ "bar").IsAbsolutePath());
-  EXPECT_TRUE(FilePath("c:/" GTEST_PATH_SEP_ "is_not"
-                       GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-#else
-  EXPECT_TRUE(FilePath(GTEST_PATH_SEP_ "is_not" GTEST_PATH_SEP_ "relative")
-              .IsAbsolutePath());
-#endif  // GTEST_OS_WINDOWS
-}
-
-TEST(FilePathTest, IsRootDirectory) {
-#if GTEST_OS_WINDOWS
-  EXPECT_TRUE(FilePath("a:\\").IsRootDirectory());
-  EXPECT_TRUE(FilePath("Z:/").IsRootDirectory());
-  EXPECT_TRUE(FilePath("e://").IsRootDirectory());
-  EXPECT_FALSE(FilePath("").IsRootDirectory());
-  EXPECT_FALSE(FilePath("b:").IsRootDirectory());
-  EXPECT_FALSE(FilePath("b:a").IsRootDirectory());
-  EXPECT_FALSE(FilePath("8:/").IsRootDirectory());
-  EXPECT_FALSE(FilePath("c|/").IsRootDirectory());
-#else
-  EXPECT_TRUE(FilePath("/").IsRootDirectory());
-  EXPECT_TRUE(FilePath("//").IsRootDirectory());
-  EXPECT_FALSE(FilePath("").IsRootDirectory());
-  EXPECT_FALSE(FilePath("\\").IsRootDirectory());
-  EXPECT_FALSE(FilePath("/x").IsRootDirectory());
-#endif
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googletest/test/googletest-filter-unittest.py b/third_party/googletest/googletest/test/googletest-filter-unittest.py
deleted file mode 100755
index 6b32f2d..0000000
--- a/third_party/googletest/googletest/test/googletest-filter-unittest.py
+++ /dev/null
@@ -1,639 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test test filters.
-
-A user can specify which test(s) in a Google Test program to run via either
-the GTEST_FILTER environment variable or the --gtest_filter flag.
-This script tests such functionality by invoking
-googletest-filter-unittest_ (a program written with Google Test) with different
-environments and command line flags.
-
-Note that test sharding may also influence which tests are filtered. Therefore,
-we test that here also.
-"""
-
-import os
-import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
-import sys
-import gtest_test_utils
-
-# Constants.
-
-# Checks if this platform can pass empty environment variables to child
-# processes.  We set an env variable to an empty string and invoke a python
-# script in a subprocess to print whether the variable is STILL in
-# os.environ.  We then use 'eval' to parse the child's output so that an
-# exception is thrown if the input is anything other than 'True' nor 'False'.
-CAN_PASS_EMPTY_ENV = False
-if sys.executable:
-  os.environ['EMPTY_VAR'] = ''
-  child = gtest_test_utils.Subprocess(
-      [sys.executable, '-c', 'import os; print(\'EMPTY_VAR\' in os.environ)'])
-  CAN_PASS_EMPTY_ENV = eval(child.output)
-
-
-# Check if this platform can unset environment variables in child processes.
-# We set an env variable to a non-empty string, unset it, and invoke
-# a python script in a subprocess to print whether the variable
-# is NO LONGER in os.environ.
-# We use 'eval' to parse the child's output so that an exception
-# is thrown if the input is neither 'True' nor 'False'.
-CAN_UNSET_ENV = False
-if sys.executable:
-  os.environ['UNSET_VAR'] = 'X'
-  del os.environ['UNSET_VAR']
-  child = gtest_test_utils.Subprocess(
-      [sys.executable, '-c', 'import os; print(\'UNSET_VAR\' not in os.environ)'
-      ])
-  CAN_UNSET_ENV = eval(child.output)
-
-
-# Checks if we should test with an empty filter. This doesn't
-# make sense on platforms that cannot pass empty env variables (Win32)
-# and on platforms that cannot unset variables (since we cannot tell
-# the difference between "" and NULL -- Borland and Solaris < 5.10)
-CAN_TEST_EMPTY_FILTER = (CAN_PASS_EMPTY_ENV and CAN_UNSET_ENV)
-
-
-# The environment variable for specifying the test filters.
-FILTER_ENV_VAR = 'GTEST_FILTER'
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
-
-# The command line flag for specifying the test filters.
-FILTER_FLAG = 'gtest_filter'
-
-# The command line flag for including disabled tests.
-ALSO_RUN_DISABLED_TESTS_FLAG = 'gtest_also_run_disabled_tests'
-
-# Command to run the googletest-filter-unittest_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-filter-unittest_')
-
-# Regex for determining whether parameterized tests are enabled in the binary.
-PARAM_TEST_REGEX = re.compile(r'/ParamTest')
-
-# Regex for parsing test case names from Google Test's output.
-TEST_CASE_REGEX = re.compile(r'^\[\-+\] \d+ tests? from (\w+(/\w+)?)')
-
-# Regex for parsing test names from Google Test's output.
-TEST_REGEX = re.compile(r'^\[\s*RUN\s*\].*\.(\w+(/\w+)?)')
-
-# The command line flag to tell Google Test to output the list of tests it
-# will run.
-LIST_TESTS_FLAG = '--gtest_list_tests'
-
-# Indicates whether Google Test supports death tests.
-SUPPORTS_DEATH_TESTS = 'HasDeathTest' in gtest_test_utils.Subprocess(
-    [COMMAND, LIST_TESTS_FLAG]).output
-
-# Full names of all tests in googletest-filter-unittests_.
-PARAM_TESTS = [
-    'SeqP/ParamTest.TestX/0',
-    'SeqP/ParamTest.TestX/1',
-    'SeqP/ParamTest.TestY/0',
-    'SeqP/ParamTest.TestY/1',
-    'SeqQ/ParamTest.TestX/0',
-    'SeqQ/ParamTest.TestX/1',
-    'SeqQ/ParamTest.TestY/0',
-    'SeqQ/ParamTest.TestY/1',
-    ]
-
-DISABLED_TESTS = [
-    'BarTest.DISABLED_TestFour',
-    'BarTest.DISABLED_TestFive',
-    'BazTest.DISABLED_TestC',
-    'DISABLED_FoobarTest.Test1',
-    'DISABLED_FoobarTest.DISABLED_Test2',
-    'DISABLED_FoobarbazTest.TestA',
-    ]
-
-if SUPPORTS_DEATH_TESTS:
-  DEATH_TESTS = [
-    'HasDeathTest.Test1',
-    'HasDeathTest.Test2',
-    ]
-else:
-  DEATH_TESTS = []
-
-# All the non-disabled tests.
-ACTIVE_TESTS = [
-    'FooTest.Abc',
-    'FooTest.Xyz',
-
-    'BarTest.TestOne',
-    'BarTest.TestTwo',
-    'BarTest.TestThree',
-
-    'BazTest.TestOne',
-    'BazTest.TestA',
-    'BazTest.TestB',
-    ] + DEATH_TESTS + PARAM_TESTS
-
-param_tests_present = None
-
-# Utilities.
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def RunAndReturnOutput(args = None):
-  """Runs the test program and returns its output."""
-
-  return gtest_test_utils.Subprocess([COMMAND] + (args or []),
-                                     env=environ).output
-
-
-def RunAndExtractTestList(args = None):
-  """Runs the test program and returns its exit code and a list of tests run."""
-
-  p = gtest_test_utils.Subprocess([COMMAND] + (args or []), env=environ)
-  tests_run = []
-  test_case = ''
-  test = ''
-  for line in p.output.split('\n'):
-    match = TEST_CASE_REGEX.match(line)
-    if match is not None:
-      test_case = match.group(1)
-    else:
-      match = TEST_REGEX.match(line)
-      if match is not None:
-        test = match.group(1)
-        tests_run.append(test_case + '.' + test)
-  return (tests_run, p.exit_code)
-
-
-def InvokeWithModifiedEnv(extra_env, function, *args, **kwargs):
-  """Runs the given function and arguments in a modified environment."""
-  try:
-    original_env = environ.copy()
-    environ.update(extra_env)
-    return function(*args, **kwargs)
-  finally:
-    environ.clear()
-    environ.update(original_env)
-
-
-def RunWithSharding(total_shards, shard_index, command):
-  """Runs a test program shard and returns exit code and a list of tests run."""
-
-  extra_env = {SHARD_INDEX_ENV_VAR: str(shard_index),
-               TOTAL_SHARDS_ENV_VAR: str(total_shards)}
-  return InvokeWithModifiedEnv(extra_env, RunAndExtractTestList, command)
-
-# The unit test.
-
-
-class GTestFilterUnitTest(gtest_test_utils.TestCase):
-  """Tests the env variable or the command line flag to filter tests."""
-
-  # Utilities.
-
-  def AssertSetEqual(self, lhs, rhs):
-    """Asserts that two sets are equal."""
-
-    for elem in lhs:
-      self.assert_(elem in rhs, '%s in %s' % (elem, rhs))
-
-    for elem in rhs:
-      self.assert_(elem in lhs, '%s in %s' % (elem, lhs))
-
-  def AssertPartitionIsValid(self, set_var, list_of_sets):
-    """Asserts that list_of_sets is a valid partition of set_var."""
-
-    full_partition = []
-    for slice_var in list_of_sets:
-      full_partition.extend(slice_var)
-    self.assertEqual(len(set_var), len(full_partition))
-    self.assertEqual(set(set_var), set(full_partition))
-
-  def AdjustForParameterizedTests(self, tests_to_run):
-    """Adjust tests_to_run in case value parameterized tests are disabled."""
-
-    global param_tests_present
-    if not param_tests_present:
-      return list(set(tests_to_run) - set(PARAM_TESTS))
-    else:
-      return tests_to_run
-
-  def RunAndVerify(self, gtest_filter, tests_to_run):
-    """Checks that the binary runs correct set of tests for a given filter."""
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # First, tests using the environment variable.
-
-    # Windows removes empty variables from the environment when passing it
-    # to a new process.  This means it is impossible to pass an empty filter
-    # into a process using the environment variable.  However, we can still
-    # test the case when the variable is not supplied (i.e., gtest_filter is
-    # None).
-    # pylint: disable-msg=C6403
-    if CAN_TEST_EMPTY_FILTER or gtest_filter != '':
-      SetEnvVar(FILTER_ENV_VAR, gtest_filter)
-      tests_run = RunAndExtractTestList()[0]
-      SetEnvVar(FILTER_ENV_VAR, None)
-      self.AssertSetEqual(tests_run, tests_to_run)
-    # pylint: enable-msg=C6403
-
-    # Next, tests using the command line flag.
-
-    if gtest_filter is None:
-      args = []
-    else:
-      args = ['--%s=%s' % (FILTER_FLAG, gtest_filter)]
-
-    tests_run = RunAndExtractTestList(args)[0]
-    self.AssertSetEqual(tests_run, tests_to_run)
-
-  def RunAndVerifyWithSharding(self, gtest_filter, total_shards, tests_to_run,
-                               args=None, check_exit_0=False):
-    """Checks that binary runs correct tests for the given filter and shard.
-
-    Runs all shards of googletest-filter-unittest_ with the given filter, and
-    verifies that the right set of tests were run. The union of tests run
-    on each shard should be identical to tests_to_run, without duplicates.
-    If check_exit_0, .
-
-    Args:
-      gtest_filter: A filter to apply to the tests.
-      total_shards: A total number of shards to split test run into.
-      tests_to_run: A set of tests expected to run.
-      args   :      Arguments to pass to the to the test binary.
-      check_exit_0: When set to a true value, make sure that all shards
-                    return 0.
-    """
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # Windows removes empty variables from the environment when passing it
-    # to a new process.  This means it is impossible to pass an empty filter
-    # into a process using the environment variable.  However, we can still
-    # test the case when the variable is not supplied (i.e., gtest_filter is
-    # None).
-    # pylint: disable-msg=C6403
-    if CAN_TEST_EMPTY_FILTER or gtest_filter != '':
-      SetEnvVar(FILTER_ENV_VAR, gtest_filter)
-      partition = []
-      for i in range(0, total_shards):
-        (tests_run, exit_code) = RunWithSharding(total_shards, i, args)
-        if check_exit_0:
-          self.assertEqual(0, exit_code)
-        partition.append(tests_run)
-
-      self.AssertPartitionIsValid(tests_to_run, partition)
-      SetEnvVar(FILTER_ENV_VAR, None)
-    # pylint: enable-msg=C6403
-
-  def RunAndVerifyAllowingDisabled(self, gtest_filter, tests_to_run):
-    """Checks that the binary runs correct set of tests for the given filter.
-
-    Runs googletest-filter-unittest_ with the given filter, and enables
-    disabled tests. Verifies that the right set of tests were run.
-
-    Args:
-      gtest_filter: A filter to apply to the tests.
-      tests_to_run: A set of tests expected to run.
-    """
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # Construct the command line.
-    args = ['--%s' % ALSO_RUN_DISABLED_TESTS_FLAG]
-    if gtest_filter is not None:
-      args.append('--%s=%s' % (FILTER_FLAG, gtest_filter))
-
-    tests_run = RunAndExtractTestList(args)[0]
-    self.AssertSetEqual(tests_run, tests_to_run)
-
-  def setUp(self):
-    """Sets up test case.
-
-    Determines whether value-parameterized tests are enabled in the binary and
-    sets the flags accordingly.
-    """
-
-    global param_tests_present
-    if param_tests_present is None:
-      param_tests_present = PARAM_TEST_REGEX.search(
-          RunAndReturnOutput()) is not None
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of not specifying the filter."""
-
-    self.RunAndVerify(None, ACTIVE_TESTS)
-
-  def testDefaultBehaviorWithShards(self):
-    """Tests the behavior without the filter, with sharding enabled."""
-
-    self.RunAndVerifyWithSharding(None, 1, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, 2, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS) - 1, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS), ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS) + 1, ACTIVE_TESTS)
-
-  def testEmptyFilter(self):
-    """Tests an empty filter."""
-
-    self.RunAndVerify('', [])
-    self.RunAndVerifyWithSharding('', 1, [])
-    self.RunAndVerifyWithSharding('', 2, [])
-
-  def testBadFilter(self):
-    """Tests a filter that matches nothing."""
-
-    self.RunAndVerify('BadFilter', [])
-    self.RunAndVerifyAllowingDisabled('BadFilter', [])
-
-  def testFullName(self):
-    """Tests filtering by full name."""
-
-    self.RunAndVerify('FooTest.Xyz', ['FooTest.Xyz'])
-    self.RunAndVerifyAllowingDisabled('FooTest.Xyz', ['FooTest.Xyz'])
-    self.RunAndVerifyWithSharding('FooTest.Xyz', 5, ['FooTest.Xyz'])
-
-  def testUniversalFilters(self):
-    """Tests filters that match everything."""
-
-    self.RunAndVerify('*', ACTIVE_TESTS)
-    self.RunAndVerify('*.*', ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding('*.*', len(ACTIVE_TESTS) - 3, ACTIVE_TESTS)
-    self.RunAndVerifyAllowingDisabled('*', ACTIVE_TESTS + DISABLED_TESTS)
-    self.RunAndVerifyAllowingDisabled('*.*', ACTIVE_TESTS + DISABLED_TESTS)
-
-  def testFilterByTestCase(self):
-    """Tests filtering by test case name."""
-
-    self.RunAndVerify('FooTest.*', ['FooTest.Abc', 'FooTest.Xyz'])
-
-    BAZ_TESTS = ['BazTest.TestOne', 'BazTest.TestA', 'BazTest.TestB']
-    self.RunAndVerify('BazTest.*', BAZ_TESTS)
-    self.RunAndVerifyAllowingDisabled('BazTest.*',
-                                      BAZ_TESTS + ['BazTest.DISABLED_TestC'])
-
-  def testFilterByTest(self):
-    """Tests filtering by test name."""
-
-    self.RunAndVerify('*.TestOne', ['BarTest.TestOne', 'BazTest.TestOne'])
-
-  def testFilterDisabledTests(self):
-    """Select only the disabled tests to run."""
-
-    self.RunAndVerify('DISABLED_FoobarTest.Test1', [])
-    self.RunAndVerifyAllowingDisabled('DISABLED_FoobarTest.Test1',
-                                      ['DISABLED_FoobarTest.Test1'])
-
-    self.RunAndVerify('*DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('*DISABLED_*', DISABLED_TESTS)
-
-    self.RunAndVerify('*.DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('*.DISABLED_*', [
-        'BarTest.DISABLED_TestFour',
-        'BarTest.DISABLED_TestFive',
-        'BazTest.DISABLED_TestC',
-        'DISABLED_FoobarTest.DISABLED_Test2',
-        ])
-
-    self.RunAndVerify('DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('DISABLED_*', [
-        'DISABLED_FoobarTest.Test1',
-        'DISABLED_FoobarTest.DISABLED_Test2',
-        'DISABLED_FoobarbazTest.TestA',
-        ])
-
-  def testWildcardInTestCaseName(self):
-    """Tests using wildcard in the test case name."""
-
-    self.RunAndVerify('*a*.*', [
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        'BazTest.TestB', ] + DEATH_TESTS + PARAM_TESTS)
-
-  def testWildcardInTestName(self):
-    """Tests using wildcard in the test name."""
-
-    self.RunAndVerify('*.*A*', ['FooTest.Abc', 'BazTest.TestA'])
-
-  def testFilterWithoutDot(self):
-    """Tests a filter that has no '.' in it."""
-
-    self.RunAndVerify('*z*', [
-        'FooTest.Xyz',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        'BazTest.TestB',
-        ])
-
-  def testTwoPatterns(self):
-    """Tests filters that consist of two patterns."""
-
-    self.RunAndVerify('Foo*.*:*A*', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BazTest.TestA',
-        ])
-
-    # An empty pattern + a non-empty one
-    self.RunAndVerify(':*A*', ['FooTest.Abc', 'BazTest.TestA'])
-
-  def testThreePatterns(self):
-    """Tests filters that consist of three patterns."""
-
-    self.RunAndVerify('*oo*:*A*:*One', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        ])
-
-    # The 2nd pattern is empty.
-    self.RunAndVerify('*oo*::*One', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-
-        'BazTest.TestOne',
-        ])
-
-    # The last 2 patterns are empty.
-    self.RunAndVerify('*oo*::', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-        ])
-
-  def testNegativeFilters(self):
-    self.RunAndVerify('*-BazTest.TestOne', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-
-        'BazTest.TestA',
-        'BazTest.TestB',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    self.RunAndVerify('*-FooTest.Abc:BazTest.*', [
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    self.RunAndVerify('BarTest.*-BarTest.TestOne', [
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ])
-
-    # Tests without leading '*'.
-    self.RunAndVerify('-FooTest.Abc:FooTest.Xyz:BazTest.*', [
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    # Value parameterized tests.
-    self.RunAndVerify('*/*', PARAM_TESTS)
-
-    # Value parameterized tests filtering by the sequence name.
-    self.RunAndVerify('SeqP/*', [
-        'SeqP/ParamTest.TestX/0',
-        'SeqP/ParamTest.TestX/1',
-        'SeqP/ParamTest.TestY/0',
-        'SeqP/ParamTest.TestY/1',
-        ])
-
-    # Value parameterized tests filtering by the test name.
-    self.RunAndVerify('*/0', [
-        'SeqP/ParamTest.TestX/0',
-        'SeqP/ParamTest.TestY/0',
-        'SeqQ/ParamTest.TestX/0',
-        'SeqQ/ParamTest.TestY/0',
-        ])
-
-  def testFlagOverridesEnvVar(self):
-    """Tests that the filter flag overrides the filtering env. variable."""
-
-    SetEnvVar(FILTER_ENV_VAR, 'Foo*')
-    args = ['--%s=%s' % (FILTER_FLAG, '*One')]
-    tests_run = RunAndExtractTestList(args)[0]
-    SetEnvVar(FILTER_ENV_VAR, None)
-
-    self.AssertSetEqual(tests_run, ['BarTest.TestOne', 'BazTest.TestOne'])
-
-  def testShardStatusFileIsCreated(self):
-    """Tests that the shard file is created if specified in the environment."""
-
-    shard_status_file = os.path.join(gtest_test_utils.GetTempDir(),
-                                     'shard_status_file')
-    self.assert_(not os.path.exists(shard_status_file))
-
-    extra_env = {SHARD_STATUS_FILE_ENV_VAR: shard_status_file}
-    try:
-      InvokeWithModifiedEnv(extra_env, RunAndReturnOutput)
-    finally:
-      self.assert_(os.path.exists(shard_status_file))
-      os.remove(shard_status_file)
-
-  def testShardStatusFileIsCreatedWithListTests(self):
-    """Tests that the shard file is created with the "list_tests" flag."""
-
-    shard_status_file = os.path.join(gtest_test_utils.GetTempDir(),
-                                     'shard_status_file2')
-    self.assert_(not os.path.exists(shard_status_file))
-
-    extra_env = {SHARD_STATUS_FILE_ENV_VAR: shard_status_file}
-    try:
-      output = InvokeWithModifiedEnv(extra_env,
-                                     RunAndReturnOutput,
-                                     [LIST_TESTS_FLAG])
-    finally:
-      # This assertion ensures that Google Test enumerated the tests as
-      # opposed to running them.
-      self.assert_('[==========]' not in output,
-                   'Unexpected output during test enumeration.\n'
-                   'Please ensure that LIST_TESTS_FLAG is assigned the\n'
-                   'correct flag value for listing Google Test tests.')
-
-      self.assert_(os.path.exists(shard_status_file))
-      os.remove(shard_status_file)
-
-  if SUPPORTS_DEATH_TESTS:
-    def testShardingWorksWithDeathTests(self):
-      """Tests integration with death tests and sharding."""
-
-      gtest_filter = 'HasDeathTest.*:SeqP/*'
-      expected_tests = [
-          'HasDeathTest.Test1',
-          'HasDeathTest.Test2',
-
-          'SeqP/ParamTest.TestX/0',
-          'SeqP/ParamTest.TestX/1',
-          'SeqP/ParamTest.TestY/0',
-          'SeqP/ParamTest.TestY/1',
-          ]
-
-      for flag in ['--gtest_death_test_style=threadsafe',
-                   '--gtest_death_test_style=fast']:
-        self.RunAndVerifyWithSharding(gtest_filter, 3, expected_tests,
-                                      check_exit_0=True, args=[flag])
-        self.RunAndVerifyWithSharding(gtest_filter, 5, expected_tests,
-                                      check_exit_0=True, args=[flag])
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-filter-unittest_.cc b/third_party/googletest/googletest/test/googletest-filter-unittest_.cc
deleted file mode 100644
index d30ec9c..0000000
--- a/third_party/googletest/googletest/test/googletest-filter-unittest_.cc
+++ /dev/null
@@ -1,137 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test test filters.
-//
-// A user can specify which test(s) in a Google Test program to run via
-// either the GTEST_FILTER environment variable or the --gtest_filter
-// flag.  This is used for testing such functionality.
-//
-// The program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-// Test case FooTest.
-
-class FooTest : public testing::Test {
-};
-
-TEST_F(FooTest, Abc) {
-}
-
-TEST_F(FooTest, Xyz) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case BarTest.
-
-TEST(BarTest, TestOne) {
-}
-
-TEST(BarTest, TestTwo) {
-}
-
-TEST(BarTest, TestThree) {
-}
-
-TEST(BarTest, DISABLED_TestFour) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(BarTest, DISABLED_TestFive) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case BazTest.
-
-TEST(BazTest, TestOne) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(BazTest, TestA) {
-}
-
-TEST(BazTest, TestB) {
-}
-
-TEST(BazTest, DISABLED_TestC) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case HasDeathTest
-
-TEST(HasDeathTest, Test1) {
-  EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*");
-}
-
-// We need at least two death tests to make sure that the all death tests
-// aren't on the first shard.
-TEST(HasDeathTest, Test2) {
-  EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*");
-}
-
-// Test case FoobarTest
-
-TEST(DISABLED_FoobarTest, Test1) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(DISABLED_FoobarTest, DISABLED_Test2) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case FoobarbazTest
-
-TEST(DISABLED_FoobarbazTest, TestA) {
-  FAIL() << "Expected failure.";
-}
-
-class ParamTest : public testing::TestWithParam<int> {
-};
-
-TEST_P(ParamTest, TestX) {
-}
-
-TEST_P(ParamTest, TestY) {
-}
-
-INSTANTIATE_TEST_SUITE_P(SeqP, ParamTest, testing::Values(1, 2));
-INSTANTIATE_TEST_SUITE_P(SeqQ, ParamTest, testing::Values(5, 6));
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-global-environment-unittest.py b/third_party/googletest/googletest/test/googletest-global-environment-unittest.py
deleted file mode 100644
index 32ba628..0000000
--- a/third_party/googletest/googletest/test/googletest-global-environment-unittest.py
+++ /dev/null
@@ -1,72 +0,0 @@
-# Copyright 2021 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Unit test for Google Test's global test environment behavior.
-
-A user can specify a global test environment via
-testing::AddGlobalTestEnvironment. Failures in the global environment should
-result in all unit tests being skipped.
-
-This script tests such functionality by invoking
-googletest-global-environment-unittest_ (a program written with Google Test).
-"""
-
-import gtest_test_utils
-
-
-def RunAndReturnOutput():
-  """Runs the test program and returns its output."""
-
-  return gtest_test_utils.Subprocess([
-      gtest_test_utils.GetTestExecutablePath(
-          'googletest-global-environment-unittest_')
-  ]).output
-
-
-class GTestGlobalEnvironmentUnitTest(gtest_test_utils.TestCase):
-  """Tests global test environment failures."""
-
-  def testEnvironmentSetUpFails(self):
-    """Tests the behavior of not specifying the fail_fast."""
-
-    # Run the test.
-    txt = RunAndReturnOutput()
-
-    # We should see the text of the global environment setup error.
-    self.assertIn('Canned environment setup error', txt)
-
-    # Our test should have been skipped due to the error, and not treated as a
-    # pass.
-    self.assertIn('[  SKIPPED ] 1 test', txt)
-    self.assertIn('[  PASSED  ] 0 tests', txt)
-
-    # The test case shouldn't have been run.
-    self.assertNotIn('Unexpected call', txt)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-global-environment-unittest_.cc b/third_party/googletest/googletest/test/googletest-global-environment-unittest_.cc
deleted file mode 100644
index f401b2f..0000000
--- a/third_party/googletest/googletest/test/googletest-global-environment-unittest_.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Unit test for Google Test global test environments.
-//
-// The program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-// An environment that always fails in its SetUp method.
-class FailingEnvironment final : public ::testing::Environment {
- public:
-  void SetUp() override { FAIL() << "Canned environment setup error"; }
-};
-
-// Register the environment.
-auto* const g_environment_ =
-    ::testing::AddGlobalTestEnvironment(new FailingEnvironment);
-
-// A test that doesn't actually run.
-TEST(SomeTest, DoesFoo) { FAIL() << "Unexpected call"; }
-
-}  // namespace
-
-int main(int argc, char** argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-json-outfiles-test.py b/third_party/googletest/googletest/test/googletest-json-outfiles-test.py
deleted file mode 100644
index 8ef47b8..0000000
--- a/third_party/googletest/googletest/test/googletest-json-outfiles-test.py
+++ /dev/null
@@ -1,191 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_json_output module."""
-
-import json
-import os
-import gtest_json_test_utils
-import gtest_test_utils
-
-GTEST_OUTPUT_SUBDIR = 'json_outfiles'
-GTEST_OUTPUT_1_TEST = 'gtest_xml_outfile1_test_'
-GTEST_OUTPUT_2_TEST = 'gtest_xml_outfile2_test_'
-
-EXPECTED_1 = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'PropertyOne',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'TestSomeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyOne',
-            u'SetUpProp': u'1',
-            u'TestSomeProperty': u'1',
-            u'TearDownProp': u'1',
-        }],
-    }],
-}
-
-EXPECTED_2 = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'PropertyTwo',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'TestSomeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'timestamp': u'*',
-            u'time': u'*',
-            u'classname': u'PropertyTwo',
-            u'SetUpProp': u'2',
-            u'TestSomeProperty': u'2',
-            u'TearDownProp': u'2',
-        }],
-    }],
-}
-
-
-class GTestJsonOutFilesTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's JSON output functionality."""
-
-  def setUp(self):
-    # We want the trailing '/' that the last "" provides in os.path.join, for
-    # telling Google Test to create an output directory instead of a single file
-    # for xml output.
-    self.output_dir_ = os.path.join(gtest_test_utils.GetTempDir(),
-                                    GTEST_OUTPUT_SUBDIR, '')
-    self.DeleteFilesAndDir()
-
-  def tearDown(self):
-    self.DeleteFilesAndDir()
-
-  def DeleteFilesAndDir(self):
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_1_TEST + '.json'))
-    except os.error:
-      pass
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_2_TEST + '.json'))
-    except os.error:
-      pass
-    try:
-      os.rmdir(self.output_dir_)
-    except os.error:
-      pass
-
-  def testOutfile1(self):
-    self._TestOutFile(GTEST_OUTPUT_1_TEST, EXPECTED_1)
-
-  def testOutfile2(self):
-    self._TestOutFile(GTEST_OUTPUT_2_TEST, EXPECTED_2)
-
-  def _TestOutFile(self, test_name, expected):
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(test_name)
-    command = [gtest_prog_path, '--gtest_output=json:%s' % self.output_dir_]
-    p = gtest_test_utils.Subprocess(command,
-                                    working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-
-    output_file_name1 = test_name + '.json'
-    output_file1 = os.path.join(self.output_dir_, output_file_name1)
-    output_file_name2 = 'lt-' + output_file_name1
-    output_file2 = os.path.join(self.output_dir_, output_file_name2)
-    self.assert_(os.path.isfile(output_file1) or os.path.isfile(output_file2),
-                 output_file1)
-
-    if os.path.isfile(output_file1):
-      with open(output_file1) as f:
-        actual = json.load(f)
-    else:
-      with open(output_file2) as f:
-        actual = json.load(f)
-    self.assertEqual(expected, gtest_json_test_utils.normalize(actual))
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '0'
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-json-output-unittest.py b/third_party/googletest/googletest/test/googletest-json-output-unittest.py
deleted file mode 100644
index 41c8565..0000000
--- a/third_party/googletest/googletest/test/googletest-json-output-unittest.py
+++ /dev/null
@@ -1,848 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_json_output module."""
-
-import datetime
-import errno
-import json
-import os
-import re
-import sys
-
-import gtest_json_test_utils
-import gtest_test_utils
-
-GTEST_FILTER_FLAG = '--gtest_filter'
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.json'
-GTEST_PROGRAM_NAME = 'gtest_xml_output_unittest_'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-if SUPPORTS_STACK_TRACES:
-  STACK_TRACE_TEMPLATE = '\nStack trace:\n*'
-else:
-  STACK_TRACE_TEMPLATE = ''
-
-EXPECTED_NON_EMPTY = {
-    u'tests':
-        26,
-    u'failures':
-        5,
-    u'disabled':
-        2,
-    u'errors':
-        0,
-    u'timestamp':
-        u'*',
-    u'time':
-        u'*',
-    u'ad_hoc_property':
-        u'42',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'SuccessfulTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SuccessfulTest'
-        }]
-    }, {
-        u'name':
-            u'FailedTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'Fails',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'FailedTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'DisabledTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            1,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'DISABLED_test_not_run',
-            u'status': u'NOTRUN',
-            u'result': u'SUPPRESSED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'DisabledTest'
-        }]
-    }, {
-        u'name':
-            u'SkippedTest',
-        u'tests':
-            3,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Skipped',
-            u'status': u'RUN',
-            u'result': u'SKIPPED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SkippedTest'
-        }, {
-            u'name': u'SkippedWithMessage',
-            u'status': u'RUN',
-            u'result': u'SKIPPED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SkippedTest'
-        }, {
-            u'name':
-                u'SkippedAfterFailure',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'SkippedTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'MixedResultTest',
-        u'tests':
-            3,
-        u'failures':
-            1,
-        u'disabled':
-            1,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'MixedResultTest'
-        }, {
-            u'name':
-                u'Fails',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'MixedResultTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }, {
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  2\n  3' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }, {
-            u'name': u'DISABLED_test',
-            u'status': u'NOTRUN',
-            u'result': u'SUPPRESSED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'MixedResultTest'
-        }]
-    }, {
-        u'name':
-            u'XmlQuotingTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'OutputsCData',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'XmlQuotingTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Failed\nXML output: <?xml encoding="utf-8">'
-                            u'<top><![CDATA[cdata text]]></top>' +
-                            STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'InvalidCharactersTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'InvalidCharactersInMessage',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'InvalidCharactersTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Failed\nInvalid characters in brackets'
-                            u' [\x01\x02]' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'PropertyRecordingTest',
-        u'tests':
-            4,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'SetUpTestSuite':
-            u'yes',
-        u'TearDownTestSuite':
-            u'aye',
-        u'testsuite': [{
-            u'name': u'OneProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'1'
-        }, {
-            u'name': u'IntValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_int': u'1'
-        }, {
-            u'name': u'ThreeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'1',
-            u'key_2': u'2',
-            u'key_3': u'3'
-        }, {
-            u'name': u'TwoValuesForOneKeyUsesLastValue',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'2'
-        }]
-    }, {
-        u'name':
-            u'NoFixtureTest',
-        u'tests':
-            3,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'RecordProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key': u'1'
-        }, {
-            u'name': u'ExternalUtilityThatCallsRecordIntValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key_for_utility_int': u'1'
-        }, {
-            u'name': u'ExternalUtilityThatCallsRecordStringValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key_for_utility_string': u'1'
-        }]
-    }, {
-        u'name':
-            u'TypedTest/0',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'int',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'TypedTest/0'
-        }]
-    }, {
-        u'name':
-            u'TypedTest/1',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'long',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'TypedTest/1'
-        }]
-    }, {
-        u'name':
-            u'Single/TypeParameterizedTestSuite/0',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'int',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/TypeParameterizedTestSuite/0'
-        }]
-    }, {
-        u'name':
-            u'Single/TypeParameterizedTestSuite/1',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'long',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/TypeParameterizedTestSuite/1'
-        }]
-    }, {
-        u'name':
-            u'Single/ValueParamTest',
-        u'tests':
-            4,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasValueParamAttribute/0',
-            u'value_param': u'33',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'HasValueParamAttribute/1',
-            u'value_param': u'42',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'AnotherTestThatHasValueParamAttribute/0',
-            u'value_param': u'33',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'AnotherTestThatHasValueParamAttribute/1',
-            u'value_param': u'42',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }]
-    }]
-}
-
-EXPECTED_FILTERED = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'ad_hoc_property':
-        u'42',
-    u'testsuites': [{
-        u'name':
-            u'SuccessfulTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SuccessfulTest',
-        }]
-    }],
-}
-
-EXPECTED_NO_TEST = {
-    u'tests':
-        0,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'NonTestSuiteFailure',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'skipped':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'',
-            u'failures': [{
-                u'failure': u'gtest_no_test_unittest.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u'',
-            }]
-        }]
-    }],
-}
-
-GTEST_PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
-
-SUPPORTS_TYPED_TESTS = 'TypedTest' in gtest_test_utils.Subprocess(
-    [GTEST_PROGRAM_PATH, GTEST_LIST_TESTS_FLAG], capture_stderr=False).output
-
-
-class GTestJsonOutputUnitTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's JSON output functionality.
-  """
-
-  # This test currently breaks on platforms that do not support typed and
-  # type-parameterized tests, so we don't run it under them.
-  if SUPPORTS_TYPED_TESTS:
-
-    def testNonEmptyJsonOutput(self):
-      """Verifies JSON output for a Google Test binary with non-empty output.
-
-      Runs a test program that generates a non-empty JSON output, and
-      tests that the JSON output is expected.
-      """
-      self._TestJsonOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY, 1)
-
-  def testNoTestJsonOutput(self):
-    """Verifies JSON output for a Google Test binary without actual tests.
-
-    Runs a test program that generates an JSON output for a binary with no
-    tests, and tests that the JSON output is expected.
-    """
-
-    self._TestJsonOutput('gtest_no_test_unittest', EXPECTED_NO_TEST, 0)
-
-  def testTimestampValue(self):
-    """Checks whether the timestamp attribute in the JSON output is valid.
-
-    Runs a test program that generates an empty JSON output, and checks if
-    the timestamp attribute in the testsuites tag is valid.
-    """
-    actual = self._GetJsonOutput('gtest_no_test_unittest', [], 0)
-    date_time_str = actual['timestamp']
-    # datetime.strptime() is only available in Python 2.5+ so we have to
-    # parse the expected datetime manually.
-    match = re.match(r'(\d+)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)', date_time_str)
-    self.assertTrue(
-        re.match,
-        'JSON datettime string %s has incorrect format' % date_time_str)
-    date_time_from_json = datetime.datetime(
-        year=int(match.group(1)), month=int(match.group(2)),
-        day=int(match.group(3)), hour=int(match.group(4)),
-        minute=int(match.group(5)), second=int(match.group(6)))
-
-    time_delta = abs(datetime.datetime.now() - date_time_from_json)
-    # timestamp value should be near the current local time
-    self.assertTrue(time_delta < datetime.timedelta(seconds=600),
-                    'time_delta is %s' % time_delta)
-
-  def testDefaultOutputFile(self):
-    """Verifies the default output file name.
-
-    Confirms that Google Test produces an JSON output file with the expected
-    default name if no name is explicitly specified.
-    """
-    output_file = os.path.join(gtest_test_utils.GetTempDir(),
-                               GTEST_DEFAULT_OUTPUT_FILE)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_no_test_unittest')
-    try:
-      os.remove(output_file)
-    except OSError:
-      e = sys.exc_info()[1]
-      if e.errno != errno.ENOENT:
-        raise
-
-    p = gtest_test_utils.Subprocess(
-        [gtest_prog_path, '%s=json' % GTEST_OUTPUT_FLAG],
-        working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    self.assert_(os.path.isfile(output_file))
-
-  def testSuppressedJsonOutput(self):
-    """Verifies that no JSON output is generated.
-
-    Tests that no JSON file is generated if the default JSON listener is
-    shut down before RUN_ALL_TESTS is invoked.
-    """
-
-    json_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             GTEST_PROGRAM_NAME + 'out.json')
-    if os.path.isfile(json_path):
-      os.remove(json_path)
-
-    command = [GTEST_PROGRAM_PATH,
-               '%s=json:%s' % (GTEST_OUTPUT_FLAG, json_path),
-               '--shut_down_xml']
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      # p.signal is available only if p.terminated_by_signal is True.
-      self.assertFalse(
-          p.terminated_by_signal,
-          '%s was killed by signal %d' % (GTEST_PROGRAM_NAME, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(1, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, 1))
-
-    self.assert_(not os.path.isfile(json_path))
-
-  def testFilteredTestJsonOutput(self):
-    """Verifies JSON output when a filter is applied.
-
-    Runs a test program that executes only some tests and verifies that
-    non-selected tests do not show up in the JSON output.
-    """
-
-    self._TestJsonOutput(GTEST_PROGRAM_NAME, EXPECTED_FILTERED, 0,
-                         extra_args=['%s=SuccessfulTest.*' % GTEST_FILTER_FLAG])
-
-  def _GetJsonOutput(self, gtest_prog_name, extra_args, expected_exit_code):
-    """Returns the JSON output generated by running the program gtest_prog_name.
-
-    Furthermore, the program's exit code must be expected_exit_code.
-
-    Args:
-      gtest_prog_name: Google Test binary name.
-      extra_args: extra arguments to binary invocation.
-      expected_exit_code: program's exit code.
-    """
-    json_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             gtest_prog_name + 'out.json')
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(gtest_prog_name)
-
-    command = (
-        [gtest_prog_path, '%s=json:%s' % (GTEST_OUTPUT_FLAG, json_path)] +
-        extra_args
-    )
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      self.assert_(False,
-                   '%s was killed by signal %d' % (gtest_prog_name, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(expected_exit_code, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, expected_exit_code))
-    with open(json_path) as f:
-      actual = json.load(f)
-    return actual
-
-  def _TestJsonOutput(self, gtest_prog_name, expected,
-                      expected_exit_code, extra_args=None):
-    """Checks the JSON output generated by the Google Test binary.
-
-    Asserts that the JSON document generated by running the program
-    gtest_prog_name matches expected_json, a string containing another
-    JSON document.  Furthermore, the program's exit code must be
-    expected_exit_code.
-
-    Args:
-      gtest_prog_name: Google Test binary name.
-      expected: expected output.
-      expected_exit_code: program's exit code.
-      extra_args: extra arguments to binary invocation.
-    """
-
-    actual = self._GetJsonOutput(gtest_prog_name, extra_args or [],
-                                 expected_exit_code)
-    self.assertEqual(expected, gtest_json_test_utils.normalize(actual))
-
-
-if __name__ == '__main__':
-  if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
-    # unittest.main() can't handle unknown flags
-    sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-list-tests-unittest.py b/third_party/googletest/googletest/test/googletest-list-tests-unittest.py
deleted file mode 100755
index 81423a3..0000000
--- a/third_party/googletest/googletest/test/googletest-list-tests-unittest.py
+++ /dev/null
@@ -1,205 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test's --gtest_list_tests flag.
-
-A user can ask Google Test to list all tests by specifying the
---gtest_list_tests flag.  This script tests such functionality
-by invoking googletest-list-tests-unittest_ (a program written with
-Google Test) the command line flags.
-"""
-
-import re
-import gtest_test_utils
-
-# Constants.
-
-# The command line flag for enabling/disabling listing all tests.
-LIST_TESTS_FLAG = 'gtest_list_tests'
-
-# Path to the googletest-list-tests-unittest_ program.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath('googletest-list-tests-unittest_')
-
-# The expected output when running googletest-list-tests-unittest_ with
-# --gtest_list_tests
-EXPECTED_OUTPUT_NO_FILTER_RE = re.compile(r"""FooDeathTest\.
-  Test1
-Foo\.
-  Bar1
-  Bar2
-  DISABLED_Bar3
-Abc\.
-  Xyz
-  Def
-FooBar\.
-  Baz
-FooTest\.
-  Test1
-  DISABLED_Test2
-  Test3
-TypedTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
-  TestA
-  TestB
-TypedTest/1\.  # TypeParam = int\s*\*( __ptr64)?
-  TestA
-  TestB
-TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
-  TestA
-  TestB
-My/TypeParamTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
-  TestA
-  TestB
-My/TypeParamTest/1\.  # TypeParam = int\s*\*( __ptr64)?
-  TestA
-  TestB
-My/TypeParamTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
-  TestA
-  TestB
-MyInstantiation/ValueParamTest\.
-  TestA/0  # GetParam\(\) = one line
-  TestA/1  # GetParam\(\) = two\\nlines
-  TestA/2  # GetParam\(\) = a very\\nlo{241}\.\.\.
-  TestB/0  # GetParam\(\) = one line
-  TestB/1  # GetParam\(\) = two\\nlines
-  TestB/2  # GetParam\(\) = a very\\nlo{241}\.\.\.
-""")
-
-# The expected output when running googletest-list-tests-unittest_ with
-# --gtest_list_tests and --gtest_filter=Foo*.
-EXPECTED_OUTPUT_FILTER_FOO_RE = re.compile(r"""FooDeathTest\.
-  Test1
-Foo\.
-  Bar1
-  Bar2
-  DISABLED_Bar3
-FooBar\.
-  Baz
-FooTest\.
-  Test1
-  DISABLED_Test2
-  Test3
-""")
-
-# Utilities.
-
-
-def Run(args):
-  """Runs googletest-list-tests-unittest_ and returns the list of tests printed."""
-
-  return gtest_test_utils.Subprocess([EXE_PATH] + args,
-                                     capture_stderr=False).output
-
-
-# The unit test.
-
-
-class GTestListTestsUnitTest(gtest_test_utils.TestCase):
-  """Tests using the --gtest_list_tests flag to list all tests."""
-
-  def RunAndVerify(self, flag_value, expected_output_re, other_flag):
-    """Runs googletest-list-tests-unittest_ and verifies that it prints
-    the correct tests.
-
-    Args:
-      flag_value:         value of the --gtest_list_tests flag;
-                          None if the flag should not be present.
-      expected_output_re: regular expression that matches the expected
-                          output after running command;
-      other_flag:         a different flag to be passed to command
-                          along with gtest_list_tests;
-                          None if the flag should not be present.
-    """
-
-    if flag_value is None:
-      flag = ''
-      flag_expression = 'not set'
-    elif flag_value == '0':
-      flag = '--%s=0' % LIST_TESTS_FLAG
-      flag_expression = '0'
-    else:
-      flag = '--%s' % LIST_TESTS_FLAG
-      flag_expression = '1'
-
-    args = [flag]
-
-    if other_flag is not None:
-      args += [other_flag]
-
-    output = Run(args)
-
-    if expected_output_re:
-      self.assert_(
-          expected_output_re.match(output),
-          ('when %s is %s, the output of "%s" is "%s",\n'
-           'which does not match regex "%s"' %
-           (LIST_TESTS_FLAG, flag_expression, ' '.join(args), output,
-            expected_output_re.pattern)))
-    else:
-      self.assert_(
-          not EXPECTED_OUTPUT_NO_FILTER_RE.match(output),
-          ('when %s is %s, the output of "%s" is "%s"'%
-           (LIST_TESTS_FLAG, flag_expression, ' '.join(args), output)))
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(flag_value=None,
-                      expected_output_re=None,
-                      other_flag=None)
-
-  def testFlag(self):
-    """Tests using the --gtest_list_tests flag."""
-
-    self.RunAndVerify(flag_value='0',
-                      expected_output_re=None,
-                      other_flag=None)
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_NO_FILTER_RE,
-                      other_flag=None)
-
-  def testOverrideNonFilterFlags(self):
-    """Tests that --gtest_list_tests overrides the non-filter flags."""
-
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_NO_FILTER_RE,
-                      other_flag='--gtest_break_on_failure')
-
-  def testWithFilterFlags(self):
-    """Tests that --gtest_list_tests takes into account the
-    --gtest_filter flag."""
-
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_FILTER_FOO_RE,
-                      other_flag='--gtest_filter=Foo*')
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-list-tests-unittest_.cc b/third_party/googletest/googletest/test/googletest-list-tests-unittest_.cc
deleted file mode 100644
index 493c6f0..0000000
--- a/third_party/googletest/googletest/test/googletest-list-tests-unittest_.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test's --gtest_list_tests flag.
-//
-// A user can ask Google Test to list all tests that will run
-// so that when using a filter, a user will know what
-// tests to look for. The tests will not be run after listing.
-//
-// This program will be invoked from a Python unit test.
-// Don't run it directly.
-
-#include "gtest/gtest.h"
-
-// Several different test cases and tests that will be listed.
-TEST(Foo, Bar1) {
-}
-
-TEST(Foo, Bar2) {
-}
-
-TEST(Foo, DISABLED_Bar3) {
-}
-
-TEST(Abc, Xyz) {
-}
-
-TEST(Abc, Def) {
-}
-
-TEST(FooBar, Baz) {
-}
-
-class FooTest : public testing::Test {
-};
-
-TEST_F(FooTest, Test1) {
-}
-
-TEST_F(FooTest, DISABLED_Test2) {
-}
-
-TEST_F(FooTest, Test3) {
-}
-
-TEST(FooDeathTest, Test1) {
-}
-
-// A group of value-parameterized tests.
-
-class MyType {
- public:
-  explicit MyType(const std::string& a_value) : value_(a_value) {}
-
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-};
-
-// Teaches Google Test how to print a MyType.
-void PrintTo(const MyType& x, std::ostream* os) {
-  *os << x.value();
-}
-
-class ValueParamTest : public testing::TestWithParam<MyType> {
-};
-
-TEST_P(ValueParamTest, TestA) {
-}
-
-TEST_P(ValueParamTest, TestB) {
-}
-
-INSTANTIATE_TEST_SUITE_P(
-    MyInstantiation, ValueParamTest,
-    testing::Values(MyType("one line"),
-                    MyType("two\nlines"),
-                    MyType("a very\nloooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line")));  // NOLINT
-
-// A group of typed tests.
-
-// A deliberately long type name for testing the line-truncating
-// behavior when printing a type parameter.
-class VeryLoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogName {  // NOLINT
-};
-
-template <typename T>
-class TypedTest : public testing::Test {
-};
-
-template <typename T, int kSize>
-class MyArray {
-};
-
-typedef testing::Types<VeryLoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogName,  // NOLINT
-                       int*, MyArray<bool, 42> > MyTypes;
-
-TYPED_TEST_SUITE(TypedTest, MyTypes);
-
-TYPED_TEST(TypedTest, TestA) {
-}
-
-TYPED_TEST(TypedTest, TestB) {
-}
-
-// A group of type-parameterized tests.
-
-template <typename T>
-class TypeParamTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(TypeParamTest);
-
-TYPED_TEST_P(TypeParamTest, TestA) {
-}
-
-TYPED_TEST_P(TypeParamTest, TestB) {
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypeParamTest, TestA, TestB);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TypeParamTest, MyTypes);
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-listener-test.cc b/third_party/googletest/googletest/test/googletest-listener-test.cc
deleted file mode 100644
index 10457af..0000000
--- a/third_party/googletest/googletest/test/googletest-listener-test.cc
+++ /dev/null
@@ -1,518 +0,0 @@
-// Copyright 2009 Google Inc. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file verifies Google Test event listeners receive events at the
-// right times.
-
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-
-using ::testing::AddGlobalTestEnvironment;
-using ::testing::Environment;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestSuite;
-using ::testing::TestEventListener;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-
-// Used by tests to register their events.
-std::vector<std::string>* g_events = nullptr;
-
-namespace testing {
-namespace internal {
-
-class EventRecordingListener : public TestEventListener {
- public:
-  explicit EventRecordingListener(const char* name) : name_(name) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramStart"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationStart")
-            << "(" << iteration << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpStart"));
-  }
-
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpEnd"));
-  }
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {
-    g_events->push_back(GetFullMethodName("OnTestCaseStart"));
-  }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestStart"));
-  }
-
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {
-    g_events->push_back(GetFullMethodName("OnTestPartResult"));
-  }
-
-  void OnTestEnd(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestEnd"));
-  }
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {
-    g_events->push_back(GetFullMethodName("OnTestCaseEnd"));
-  }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownStart"));
-  }
-
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownEnd"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationEnd")
-            << "("  << iteration << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramEnd"));
-  }
-
- private:
-  std::string GetFullMethodName(const char* name) {
-    return name_ + "." + name;
-  }
-
-  std::string name_;
-};
-
-// This listener is using OnTestSuiteStart, OnTestSuiteEnd API
-class EventRecordingListener2 : public TestEventListener {
- public:
-  explicit EventRecordingListener2(const char* name) : name_(name) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramStart"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationStart") << "(" << iteration
-            << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpStart"));
-  }
-
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpEnd"));
-  }
-
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {
-    g_events->push_back(GetFullMethodName("OnTestSuiteStart"));
-  }
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestStart"));
-  }
-
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {
-    g_events->push_back(GetFullMethodName("OnTestPartResult"));
-  }
-
-  void OnTestEnd(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestEnd"));
-  }
-
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {
-    g_events->push_back(GetFullMethodName("OnTestSuiteEnd"));
-  }
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownStart"));
-  }
-
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownEnd"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationEnd") << "(" << iteration
-            << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramEnd"));
-  }
-
- private:
-  std::string GetFullMethodName(const char* name) { return name_ + "." + name; }
-
-  std::string name_;
-};
-
-class EnvironmentInvocationCatcher : public Environment {
- protected:
-  void SetUp() override { g_events->push_back("Environment::SetUp"); }
-
-  void TearDown() override { g_events->push_back("Environment::TearDown"); }
-};
-
-class ListenerTest : public Test {
- protected:
-  static void SetUpTestSuite() {
-    g_events->push_back("ListenerTest::SetUpTestSuite");
-  }
-
-  static void TearDownTestSuite() {
-    g_events->push_back("ListenerTest::TearDownTestSuite");
-  }
-
-  void SetUp() override { g_events->push_back("ListenerTest::SetUp"); }
-
-  void TearDown() override { g_events->push_back("ListenerTest::TearDown"); }
-};
-
-TEST_F(ListenerTest, DoesFoo) {
-  // Test execution order within a test case is not guaranteed so we are not
-  // recording the test name.
-  g_events->push_back("ListenerTest::* Test Body");
-  SUCCEED();  // Triggers OnTestPartResult.
-}
-
-TEST_F(ListenerTest, DoesBar) {
-  g_events->push_back("ListenerTest::* Test Body");
-  SUCCEED();  // Triggers OnTestPartResult.
-}
-
-}  // namespace internal
-
-}  // namespace testing
-
-using ::testing::internal::EnvironmentInvocationCatcher;
-using ::testing::internal::EventRecordingListener;
-using ::testing::internal::EventRecordingListener2;
-
-void VerifyResults(const std::vector<std::string>& data,
-                   const char* const* expected_data,
-                   size_t expected_data_size) {
-  const size_t actual_size = data.size();
-  // If the following assertion fails, a new entry will be appended to
-  // data.  Hence we save data.size() first.
-  EXPECT_EQ(expected_data_size, actual_size);
-
-  // Compares the common prefix.
-  const size_t shorter_size = expected_data_size <= actual_size ?
-      expected_data_size : actual_size;
-  size_t i = 0;
-  for (; i < shorter_size; ++i) {
-    ASSERT_STREQ(expected_data[i], data[i].c_str())
-        << "at position " << i;
-  }
-
-  // Prints extra elements in the actual data.
-  for (; i < actual_size; ++i) {
-    printf("  Actual event #%lu: %s\n",
-        static_cast<unsigned long>(i), data[i].c_str());
-  }
-}
-
-int main(int argc, char **argv) {
-  std::vector<std::string> events;
-  g_events = &events;
-  InitGoogleTest(&argc, argv);
-
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener("1st"));
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener("2nd"));
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener2("3rd"));
-
-  AddGlobalTestEnvironment(new EnvironmentInvocationCatcher);
-
-  GTEST_CHECK_(events.size() == 0)
-      << "AddGlobalTestEnvironment should not generate any events itself.";
-
-  ::testing::GTEST_FLAG(repeat) = 2;
-  int ret_val = RUN_ALL_TESTS();
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // The deprecated OnTestSuiteStart/OnTestCaseStart events are included
-  const char* const expected_events[] = {"1st.OnTestProgramStart",
-                                         "2nd.OnTestProgramStart",
-                                         "3rd.OnTestProgramStart",
-                                         "1st.OnTestIterationStart(0)",
-                                         "2nd.OnTestIterationStart(0)",
-                                         "3rd.OnTestIterationStart(0)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "1st.OnTestCaseStart",
-                                         "2nd.OnTestCaseStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "2nd.OnTestCaseEnd",
-                                         "1st.OnTestCaseEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(0)",
-                                         "2nd.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationStart(1)",
-                                         "2nd.OnTestIterationStart(1)",
-                                         "3rd.OnTestIterationStart(1)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "1st.OnTestCaseStart",
-                                         "2nd.OnTestCaseStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "2nd.OnTestCaseEnd",
-                                         "1st.OnTestCaseEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(1)",
-                                         "2nd.OnTestIterationEnd(1)",
-                                         "1st.OnTestIterationEnd(1)",
-                                         "3rd.OnTestProgramEnd",
-                                         "2nd.OnTestProgramEnd",
-                                         "1st.OnTestProgramEnd"};
-#else
-  const char* const expected_events[] = {"1st.OnTestProgramStart",
-                                         "2nd.OnTestProgramStart",
-                                         "3rd.OnTestProgramStart",
-                                         "1st.OnTestIterationStart(0)",
-                                         "2nd.OnTestIterationStart(0)",
-                                         "3rd.OnTestIterationStart(0)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(0)",
-                                         "2nd.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationStart(1)",
-                                         "2nd.OnTestIterationStart(1)",
-                                         "3rd.OnTestIterationStart(1)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(1)",
-                                         "2nd.OnTestIterationEnd(1)",
-                                         "1st.OnTestIterationEnd(1)",
-                                         "3rd.OnTestProgramEnd",
-                                         "2nd.OnTestProgramEnd",
-                                         "1st.OnTestProgramEnd"};
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  VerifyResults(events,
-                expected_events,
-                sizeof(expected_events)/sizeof(expected_events[0]));
-
-  // We need to check manually for ad hoc test failures that happen after
-  // RUN_ALL_TESTS finishes.
-  if (UnitTest::GetInstance()->Failed())
-    ret_val = 1;
-
-  return ret_val;
-}
diff --git a/third_party/googletest/googletest/test/googletest-message-test.cc b/third_party/googletest/googletest/test/googletest-message-test.cc
deleted file mode 100644
index 962d519..0000000
--- a/third_party/googletest/googletest/test/googletest-message-test.cc
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for the Message class.
-
-#include "gtest/gtest-message.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::Message;
-
-// Tests the testing::Message class
-
-// Tests the default constructor.
-TEST(MessageTest, DefaultConstructor) {
-  const Message msg;
-  EXPECT_EQ("", msg.GetString());
-}
-
-// Tests the copy constructor.
-TEST(MessageTest, CopyConstructor) {
-  const Message msg1("Hello");
-  const Message msg2(msg1);
-  EXPECT_EQ("Hello", msg2.GetString());
-}
-
-// Tests constructing a Message from a C-string.
-TEST(MessageTest, ConstructsFromCString) {
-  Message msg("Hello");
-  EXPECT_EQ("Hello", msg.GetString());
-}
-
-// Tests streaming a float.
-TEST(MessageTest, StreamsFloat) {
-  const std::string s = (Message() << 1.23456F << " " << 2.34567F).GetString();
-  // Both numbers should be printed with enough precision.
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1.234560", s.c_str());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 2.345669", s.c_str());
-}
-
-// Tests streaming a double.
-TEST(MessageTest, StreamsDouble) {
-  const std::string s = (Message() << 1260570880.4555497 << " "
-                                  << 1260572265.1954534).GetString();
-  // Both numbers should be printed with enough precision.
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1260570880.45", s.c_str());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 1260572265.19", s.c_str());
-}
-
-// Tests streaming a non-char pointer.
-TEST(MessageTest, StreamsPointer) {
-  int n = 0;
-  int* p = &n;
-  EXPECT_NE("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming a NULL non-char pointer.
-TEST(MessageTest, StreamsNullPointer) {
-  int* p = nullptr;
-  EXPECT_EQ("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming a C string.
-TEST(MessageTest, StreamsCString) {
-  EXPECT_EQ("Foo", (Message() << "Foo").GetString());
-}
-
-// Tests streaming a NULL C string.
-TEST(MessageTest, StreamsNullCString) {
-  char* p = nullptr;
-  EXPECT_EQ("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming std::string.
-TEST(MessageTest, StreamsString) {
-  const ::std::string str("Hello");
-  EXPECT_EQ("Hello", (Message() << str).GetString());
-}
-
-// Tests that we can output strings containing embedded NULs.
-TEST(MessageTest, StreamsStringWithEmbeddedNUL) {
-  const char char_array_with_nul[] =
-      "Here's a NUL\0 and some more string";
-  const ::std::string string_with_nul(char_array_with_nul,
-                                      sizeof(char_array_with_nul) - 1);
-  EXPECT_EQ("Here's a NUL\\0 and some more string",
-            (Message() << string_with_nul).GetString());
-}
-
-// Tests streaming a NUL char.
-TEST(MessageTest, StreamsNULChar) {
-  EXPECT_EQ("\\0", (Message() << '\0').GetString());
-}
-
-// Tests streaming int.
-TEST(MessageTest, StreamsInt) {
-  EXPECT_EQ("123", (Message() << 123).GetString());
-}
-
-// Tests that basic IO manipulators (endl, ends, and flush) can be
-// streamed to Message.
-TEST(MessageTest, StreamsBasicIoManip) {
-  EXPECT_EQ("Line 1.\nA NUL char \\0 in line 2.",
-               (Message() << "Line 1." << std::endl
-                         << "A NUL char " << std::ends << std::flush
-                         << " in line 2.").GetString());
-}
-
-// Tests Message::GetString()
-TEST(MessageTest, GetString) {
-  Message msg;
-  msg << 1 << " lamb";
-  EXPECT_EQ("1 lamb", msg.GetString());
-}
-
-// Tests streaming a Message object to an ostream.
-TEST(MessageTest, StreamsToOStream) {
-  Message msg("Hello");
-  ::std::stringstream ss;
-  ss << msg;
-  EXPECT_EQ("Hello", testing::internal::StringStreamToString(&ss));
-}
-
-// Tests that a Message object doesn't take up too much stack space.
-TEST(MessageTest, DoesNotTakeUpMuchStackSpace) {
-  EXPECT_LE(sizeof(Message), 16U);
-}
-
-}  // namespace
diff --git a/third_party/googletest/googletest/test/googletest-options-test.cc b/third_party/googletest/googletest/test/googletest-options-test.cc
deleted file mode 100644
index 11fb1f2..0000000
--- a/third_party/googletest/googletest/test/googletest-options-test.cc
+++ /dev/null
@@ -1,219 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test UnitTestOptions tests
-//
-// This file tests classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included from gtest.cc, to avoid changing build or
-// make-files on Windows and other platforms. Do not #include this file
-// anywhere else!
-
-#include "gtest/gtest.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-#elif GTEST_OS_OS2
-// For strcasecmp on OS/2
-#include <strings.h>
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-namespace {
-
-// Turns the given relative path into an absolute path.
-FilePath GetAbsolutePathOf(const FilePath& relative_path) {
-  return FilePath::ConcatPaths(FilePath::GetCurrentDir(), relative_path);
-}
-
-// Testing UnitTestOptions::GetOutputFormat/GetOutputFile.
-
-TEST(XmlOutputTest, GetOutputFormatDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_STREQ("", UnitTestOptions::GetOutputFormat().c_str());
-}
-
-TEST(XmlOutputTest, GetOutputFormat) {
-  GTEST_FLAG(output) = "xml:filename";
-  EXPECT_STREQ("xml", UnitTestOptions::GetOutputFormat().c_str());
-}
-
-TEST(XmlOutputTest, GetOutputFileDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_EQ(GetAbsolutePathOf(FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST(XmlOutputTest, GetOutputFileSingleFile) {
-  GTEST_FLAG(output) = "xml:filename.abc";
-  EXPECT_EQ(GetAbsolutePathOf(FilePath("filename.abc")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST(XmlOutputTest, GetOutputFileFromDirectoryPath) {
-  GTEST_FLAG(output) = "xml:path" GTEST_PATH_SEP_;
-  const std::string expected_output_file =
-      GetAbsolutePathOf(
-          FilePath(std::string("path") + GTEST_PATH_SEP_ +
-                   GetCurrentExecutableName().string() + ".xml")).string();
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-TEST(OutputFileHelpersTest, GetCurrentExecutableName) {
-  const std::string exe_str = GetCurrentExecutableName().string();
-#if GTEST_OS_WINDOWS
-  const bool success =
-      _strcmpi("googletest-options-test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest-options-ex_test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest_all_test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest_dll_test", exe_str.c_str()) == 0;
-#elif GTEST_OS_OS2
-  const bool success =
-      strcasecmp("googletest-options-test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest-options-ex_test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest_all_test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest_dll_test", exe_str.c_str()) == 0;
-#elif GTEST_OS_FUCHSIA
-  const bool success = exe_str == "app";
-#else
-  const bool success =
-      exe_str == "googletest-options-test" ||
-      exe_str == "gtest_all_test" ||
-      exe_str == "lt-gtest_all_test" ||
-      exe_str == "gtest_dll_test";
-#endif  // GTEST_OS_WINDOWS
-  if (!success)
-    FAIL() << "GetCurrentExecutableName() returns " << exe_str;
-}
-
-#if !GTEST_OS_FUCHSIA
-
-class XmlOutputChangeDirTest : public Test {
- protected:
-  void SetUp() override {
-    original_working_dir_ = FilePath::GetCurrentDir();
-    posix::ChDir("..");
-    // This will make the test fail if run from the root directory.
-    EXPECT_NE(original_working_dir_.string(),
-              FilePath::GetCurrentDir().string());
-  }
-
-  void TearDown() override {
-    posix::ChDir(original_working_dir_.string().c_str());
-  }
-
-  FilePath original_working_dir_;
-};
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithDefaultXML) {
-  GTEST_FLAG(output) = "xml";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithRelativeFile) {
-  GTEST_FLAG(output) = "xml:filename.abc";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("filename.abc")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithRelativePath) {
-  GTEST_FLAG(output) = "xml:path" GTEST_PATH_SEP_;
-  const std::string expected_output_file =
-      FilePath::ConcatPaths(
-          original_working_dir_,
-          FilePath(std::string("path") + GTEST_PATH_SEP_ +
-                   GetCurrentExecutableName().string() + ".xml")).string();
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithAbsoluteFile) {
-#if GTEST_OS_WINDOWS
-  GTEST_FLAG(output) = "xml:c:\\tmp\\filename.abc";
-  EXPECT_EQ(FilePath("c:\\tmp\\filename.abc").string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-#else
-  GTEST_FLAG(output) ="xml:/tmp/filename.abc";
-  EXPECT_EQ(FilePath("/tmp/filename.abc").string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-#endif
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithAbsolutePath) {
-#if GTEST_OS_WINDOWS
-  const std::string path = "c:\\tmp\\";
-#else
-  const std::string path = "/tmp/";
-#endif
-
-  GTEST_FLAG(output) = "xml:" + path;
-  const std::string expected_output_file =
-      path + GetCurrentExecutableName().string() + ".xml";
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-#endif  // !GTEST_OS_FUCHSIA
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googletest/test/googletest-output-test-golden-lin.txt b/third_party/googletest/googletest/test/googletest-output-test-golden-lin.txt
deleted file mode 100644
index 3fab3b9..0000000
--- a/third_party/googletest/googletest/test/googletest-output-test-golden-lin.txt
+++ /dev/null
@@ -1,1180 +0,0 @@
-The non-test part of the code is expected to have 2 failures.
-
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  3
-Stack trace: (omitted)
-
-[0;32m[==========] [mRunning 88 tests from 41 test suites.
-[0;32m[----------] [mGlobal test environment set-up.
-FooEnvironment::SetUp() called.
-BarEnvironment::SetUp() called.
-[0;32m[----------] [m1 test from ADeathTest
-[0;32m[ RUN      ] [mADeathTest.ShouldRunFirst
-[0;32m[       OK ] [mADeathTest.ShouldRunFirst
-[0;32m[----------] [m1 test from ATypedDeathTest/0, where TypeParam = int
-[0;32m[ RUN      ] [mATypedDeathTest/0.ShouldRunFirst
-[0;32m[       OK ] [mATypedDeathTest/0.ShouldRunFirst
-[0;32m[----------] [m1 test from ATypedDeathTest/1, where TypeParam = double
-[0;32m[ RUN      ] [mATypedDeathTest/1.ShouldRunFirst
-[0;32m[       OK ] [mATypedDeathTest/1.ShouldRunFirst
-[0;32m[----------] [m1 test from My/ATypeParamDeathTest/0, where TypeParam = int
-[0;32m[ RUN      ] [mMy/ATypeParamDeathTest/0.ShouldRunFirst
-[0;32m[       OK ] [mMy/ATypeParamDeathTest/0.ShouldRunFirst
-[0;32m[----------] [m1 test from My/ATypeParamDeathTest/1, where TypeParam = double
-[0;32m[ RUN      ] [mMy/ATypeParamDeathTest/1.ShouldRunFirst
-[0;32m[       OK ] [mMy/ATypeParamDeathTest/1.ShouldRunFirst
-[0;32m[----------] [m2 tests from PassingTest
-[0;32m[ RUN      ] [mPassingTest.PassingTest1
-[0;32m[       OK ] [mPassingTest.PassingTest1
-[0;32m[ RUN      ] [mPassingTest.PassingTest2
-[0;32m[       OK ] [mPassingTest.PassingTest2
-[0;32m[----------] [m2 tests from NonfatalFailureTest
-[0;32m[ RUN      ] [mNonfatalFailureTest.EscapesStringOperands
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  kGoldenString
-    Which is: "\"Line"
-  actual
-    Which is: "actual \"string\""
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  golden
-    Which is: "\"Line"
-  actual
-    Which is: "actual \"string\""
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mNonfatalFailureTest.EscapesStringOperands
-[0;32m[ RUN      ] [mNonfatalFailureTest.DiffForLongStrings
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  golden_str
-    Which is: "\"Line\0 1\"\nLine 2"
-  "Line 2"
-With diff:
-@@ -1,2 @@
--\"Line\0 1\"
- Line 2
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mNonfatalFailureTest.DiffForLongStrings
-[0;32m[----------] [m3 tests from FatalFailureTest
-[0;32m[ RUN      ] [mFatalFailureTest.FatalFailureInSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mFatalFailureTest.FatalFailureInSubroutine
-[0;32m[ RUN      ] [mFatalFailureTest.FatalFailureInNestedSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mFatalFailureTest.FatalFailureInNestedSubroutine
-[0;32m[ RUN      ] [mFatalFailureTest.NonfatalFailureInSubroutine
-(expecting a failure on false)
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mFatalFailureTest.NonfatalFailureInSubroutine
-[0;32m[----------] [m1 test from LoggingTest
-[0;32m[ RUN      ] [mLoggingTest.InterleavingLoggingAndAssertions
-(expecting 2 failures on (3) >= (a[i]))
-i == 0
-i == 1
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 9
-Stack trace: (omitted)
-
-i == 2
-i == 3
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 6
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mLoggingTest.InterleavingLoggingAndAssertions
-[0;32m[----------] [m7 tests from SCOPED_TRACETest
-[0;32m[ RUN      ] [mSCOPED_TRACETest.AcceptedValues
-googletest-output-test_.cc:#: Failure
-Failed
-Just checking that all these values work fine.
-Google Test trace:
-googletest-output-test_.cc:#: (null)
-googletest-output-test_.cc:#: 1337
-googletest-output-test_.cc:#: std::string
-googletest-output-test_.cc:#: literal string
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.AcceptedValues
-[0;32m[ RUN      ] [mSCOPED_TRACETest.ObeysScopes
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and shouldn't have a trace.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should have a trace.
-Google Test trace:
-googletest-output-test_.cc:#: Expected trace
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and shouldn't have a trace.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.ObeysScopes
-[0;32m[ RUN      ] [mSCOPED_TRACETest.WorksInLoop
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  n
-    Which is: 1
-Google Test trace:
-googletest-output-test_.cc:#: i = 1
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: i = 2
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.WorksInLoop
-[0;32m[ RUN      ] [mSCOPED_TRACETest.WorksInSubroutine
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  n
-    Which is: 1
-Google Test trace:
-googletest-output-test_.cc:#: n = 1
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: n = 2
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.WorksInSubroutine
-[0;32m[ RUN      ] [mSCOPED_TRACETest.CanBeNested
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: n = 2
-googletest-output-test_.cc:#: 
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.CanBeNested
-[0;32m[ RUN      ] [mSCOPED_TRACETest.CanBeRepeated
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A.
-Google Test trace:
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A and B.
-Google Test trace:
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A, B, and C.
-Google Test trace:
-googletest-output-test_.cc:#: C
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A, B, and D.
-Google Test trace:
-googletest-output-test_.cc:#: D
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.CanBeRepeated
-[0;32m[ RUN      ] [mSCOPED_TRACETest.WorksConcurrently
-(expecting 6 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1 (in thread B, only trace B alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace B
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2 (in thread A, trace A & B both alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3 (in thread B, trace A & B both alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace B
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4 (in thread B, only trace A alive).
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #5 (in thread A, only trace A alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #6 (in thread A, no trace alive).
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.WorksConcurrently
-[0;32m[----------] [m1 test from ScopedTraceTest
-[0;32m[ RUN      ] [mScopedTraceTest.WithExplicitFileAndLine
-googletest-output-test_.cc:#: Failure
-Failed
-Check that the trace is attached to a particular location.
-Google Test trace:
-explicit_file.cc:123: expected trace message
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mScopedTraceTest.WithExplicitFileAndLine
-[0;32m[----------] [m1 test from NonFatalFailureInFixtureConstructorTest
-[0;32m[ RUN      ] [mNonFatalFailureInFixtureConstructorTest.FailureInConstructor
-(expecting 5 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in the test fixture c'tor.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in the test body.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4, in TearDown.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #5, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mNonFatalFailureInFixtureConstructorTest.FailureInConstructor
-[0;32m[----------] [m1 test from FatalFailureInFixtureConstructorTest
-[0;32m[ RUN      ] [mFatalFailureInFixtureConstructorTest.FailureInConstructor
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in the test fixture c'tor.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mFatalFailureInFixtureConstructorTest.FailureInConstructor
-[0;32m[----------] [m1 test from NonFatalFailureInSetUpTest
-[0;32m[ RUN      ] [mNonFatalFailureInSetUpTest.FailureInSetUp
-(expecting 4 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in the test function.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in TearDown().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mNonFatalFailureInSetUpTest.FailureInSetUp
-[0;32m[----------] [m1 test from FatalFailureInSetUpTest
-[0;32m[ RUN      ] [mFatalFailureInSetUpTest.FailureInSetUp
-(expecting 3 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in TearDown().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mFatalFailureInSetUpTest.FailureInSetUp
-[0;32m[----------] [m1 test from AddFailureAtTest
-[0;32m[ RUN      ] [mAddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-foo.cc:42: Failure
-Failed
-Expected nonfatal failure in foo.cc
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mAddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-[0;32m[----------] [m1 test from GtestFailAtTest
-[0;32m[ RUN      ] [mGtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-foo.cc:42: Failure
-Failed
-Expected fatal failure in foo.cc
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mGtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-[0;32m[----------] [m4 tests from MixedUpTestSuiteTest
-[0;32m[ RUN      ] [mMixedUpTestSuiteTest.FirstTestFromNamespaceFoo
-[0;32m[       OK ] [mMixedUpTestSuiteTest.FirstTestFromNamespaceFoo
-[0;32m[ RUN      ] [mMixedUpTestSuiteTest.SecondTestFromNamespaceFoo
-[0;32m[       OK ] [mMixedUpTestSuiteTest.SecondTestFromNamespaceFoo
-[0;32m[ RUN      ] [mMixedUpTestSuiteTest.ThisShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteTest,
-you defined test FirstTestFromNamespaceFoo and test ThisShouldFail
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mMixedUpTestSuiteTest.ThisShouldFail
-[0;32m[ RUN      ] [mMixedUpTestSuiteTest.ThisShouldFailToo
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteTest,
-you defined test FirstTestFromNamespaceFoo and test ThisShouldFailToo
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mMixedUpTestSuiteTest.ThisShouldFailToo
-[0;32m[----------] [m2 tests from MixedUpTestSuiteWithSameTestNameTest
-[0;32m[ RUN      ] [mMixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[0;32m[       OK ] [mMixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[0;32m[ RUN      ] [mMixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteWithSameTestNameTest,
-you defined test TheSecondTestWithThisNameShouldFail and test TheSecondTestWithThisNameShouldFail
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mMixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[0;32m[----------] [m2 tests from TEST_F_before_TEST_in_same_test_case
-[0;32m[ RUN      ] [mTEST_F_before_TEST_in_same_test_case.DefinedUsingTEST_F
-[0;32m[       OK ] [mTEST_F_before_TEST_in_same_test_case.DefinedUsingTEST_F
-[0;32m[ RUN      ] [mTEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite TEST_F_before_TEST_in_same_test_case,
-test DefinedUsingTEST_F is defined using TEST_F but
-test DefinedUsingTESTAndShouldFail is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mTEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-[0;32m[----------] [m2 tests from TEST_before_TEST_F_in_same_test_case
-[0;32m[ RUN      ] [mTEST_before_TEST_F_in_same_test_case.DefinedUsingTEST
-[0;32m[       OK ] [mTEST_before_TEST_F_in_same_test_case.DefinedUsingTEST
-[0;32m[ RUN      ] [mTEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite TEST_before_TEST_F_in_same_test_case,
-test DefinedUsingTEST_FAndShouldFail is defined using TEST_F but
-test DefinedUsingTEST is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mTEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-[0;32m[----------] [m8 tests from ExpectNonfatalFailureTest
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.CanReferenceGlobalVariables
-[0;32m[       OK ] [mExpectNonfatalFailureTest.CanReferenceGlobalVariables
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.CanReferenceLocalVariables
-[0;32m[       OK ] [mExpectNonfatalFailureTest.CanReferenceLocalVariables
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.SucceedsWhenThereIsOneNonfatalFailure
-[0;32m[       OK ] [mExpectNonfatalFailureTest.SucceedsWhenThereIsOneNonfatalFailure
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 2 failures
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure 1.
-Stack trace: (omitted)
-
-
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure 2.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.FailsWhenStatementReturns
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenStatementReturns
-[0;32m[ RUN      ] [mExpectNonfatalFailureTest.FailsWhenStatementThrows
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenStatementThrows
-[0;32m[----------] [m8 tests from ExpectFatalFailureTest
-[0;32m[ RUN      ] [mExpectFatalFailureTest.CanReferenceGlobalVariables
-[0;32m[       OK ] [mExpectFatalFailureTest.CanReferenceGlobalVariables
-[0;32m[ RUN      ] [mExpectFatalFailureTest.CanReferenceLocalStaticVariables
-[0;32m[       OK ] [mExpectFatalFailureTest.CanReferenceLocalStaticVariables
-[0;32m[ RUN      ] [mExpectFatalFailureTest.SucceedsWhenThereIsOneFatalFailure
-[0;32m[       OK ] [mExpectFatalFailureTest.SucceedsWhenThereIsOneFatalFailure
-[0;32m[ RUN      ] [mExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-[0;32m[ RUN      ] [mExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 2 failures
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-[0;32m[ RUN      ] [mExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-[0;32m[ RUN      ] [mExpectFatalFailureTest.FailsWhenStatementReturns
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenStatementReturns
-[0;32m[ RUN      ] [mExpectFatalFailureTest.FailsWhenStatementThrows
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenStatementThrows
-[0;32m[----------] [m2 tests from TypedTest/0, where TypeParam = int
-[0;32m[ RUN      ] [mTypedTest/0.Success
-[0;32m[       OK ] [mTypedTest/0.Success
-[0;32m[ RUN      ] [mTypedTest/0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mTypedTest/0.Failure, where TypeParam = int
-[0;32m[----------] [m2 tests from TypedTestWithNames/char0, where TypeParam = char
-[0;32m[ RUN      ] [mTypedTestWithNames/char0.Success
-[0;32m[       OK ] [mTypedTestWithNames/char0.Success
-[0;32m[ RUN      ] [mTypedTestWithNames/char0.Failure
-googletest-output-test_.cc:#: Failure
-Failed
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mTypedTestWithNames/char0.Failure, where TypeParam = char
-[0;32m[----------] [m2 tests from TypedTestWithNames/int1, where TypeParam = int
-[0;32m[ RUN      ] [mTypedTestWithNames/int1.Success
-[0;32m[       OK ] [mTypedTestWithNames/int1.Success
-[0;32m[ RUN      ] [mTypedTestWithNames/int1.Failure
-googletest-output-test_.cc:#: Failure
-Failed
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mTypedTestWithNames/int1.Failure, where TypeParam = int
-[0;32m[----------] [m2 tests from Unsigned/TypedTestP/0, where TypeParam = unsigned char
-[0;32m[ RUN      ] [mUnsigned/TypedTestP/0.Success
-[0;32m[       OK ] [mUnsigned/TypedTestP/0.Success
-[0;32m[ RUN      ] [mUnsigned/TypedTestP/0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: '\0'
-Expected failure
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mUnsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
-[0;32m[----------] [m2 tests from Unsigned/TypedTestP/1, where TypeParam = unsigned int
-[0;32m[ RUN      ] [mUnsigned/TypedTestP/1.Success
-[0;32m[       OK ] [mUnsigned/TypedTestP/1.Success
-[0;32m[ RUN      ] [mUnsigned/TypedTestP/1.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mUnsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
-[0;32m[----------] [m2 tests from UnsignedCustomName/TypedTestP/unsignedChar0, where TypeParam = unsigned char
-[0;32m[ RUN      ] [mUnsignedCustomName/TypedTestP/unsignedChar0.Success
-[0;32m[       OK ] [mUnsignedCustomName/TypedTestP/unsignedChar0.Success
-[0;32m[ RUN      ] [mUnsignedCustomName/TypedTestP/unsignedChar0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: '\0'
-Expected failure
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mUnsignedCustomName/TypedTestP/unsignedChar0.Failure, where TypeParam = unsigned char
-[0;32m[----------] [m2 tests from UnsignedCustomName/TypedTestP/unsignedInt1, where TypeParam = unsigned int
-[0;32m[ RUN      ] [mUnsignedCustomName/TypedTestP/unsignedInt1.Success
-[0;32m[       OK ] [mUnsignedCustomName/TypedTestP/unsignedInt1.Success
-[0;32m[ RUN      ] [mUnsignedCustomName/TypedTestP/unsignedInt1.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mUnsignedCustomName/TypedTestP/unsignedInt1.Failure, where TypeParam = unsigned int
-[0;32m[----------] [m4 tests from ExpectFailureTest
-[0;32m[ RUN      ] [mExpectFailureTest.ExpectFatalFailure
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure containing "Some other fatal failure expected."
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectFatalFailure
-[0;32m[ RUN      ] [mExpectFailureTest.ExpectNonFatalFailure
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure containing "Some other non-fatal failure."
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectNonFatalFailure
-[0;32m[ RUN      ] [mExpectFailureTest.ExpectFatalFailureOnAllThreads
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure containing "Some other fatal failure expected."
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectFatalFailureOnAllThreads
-[0;32m[ RUN      ] [mExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure containing "Some other non-fatal failure."
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-[0;32m[----------] [m2 tests from ExpectFailureWithThreadsTest
-[0;32m[ RUN      ] [mExpectFailureWithThreadsTest.ExpectFatalFailure
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFailureWithThreadsTest.ExpectFatalFailure
-[0;32m[ RUN      ] [mExpectFailureWithThreadsTest.ExpectNonFatalFailure
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mExpectFailureWithThreadsTest.ExpectNonFatalFailure
-[0;32m[----------] [m1 test from ScopedFakeTestPartResultReporterTest
-[0;32m[ RUN      ] [mScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-[0;32m[----------] [m2 tests from DynamicFixture
-DynamicFixture::SetUpTestSuite
-[0;32m[ RUN      ] [mDynamicFixture.DynamicTestPass
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[0;32m[       OK ] [mDynamicFixture.DynamicTestPass
-[0;32m[ RUN      ] [mDynamicFixture.DynamicTestFail
-DynamicFixture()
-DynamicFixture::SetUp
-googletest-output-test_.cc:#: Failure
-Value of: Pass
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-DynamicFixture::TearDown
-~DynamicFixture()
-[0;31m[  FAILED  ] [mDynamicFixture.DynamicTestFail
-DynamicFixture::TearDownTestSuite
-[0;32m[----------] [m1 test from DynamicFixtureAnotherName
-DynamicFixture::SetUpTestSuite
-[0;32m[ RUN      ] [mDynamicFixtureAnotherName.DynamicTestPass
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[0;32m[       OK ] [mDynamicFixtureAnotherName.DynamicTestPass
-DynamicFixture::TearDownTestSuite
-[0;32m[----------] [m2 tests from BadDynamicFixture1
-DynamicFixture::SetUpTestSuite
-[0;32m[ RUN      ] [mBadDynamicFixture1.FixtureBase
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[0;32m[       OK ] [mBadDynamicFixture1.FixtureBase
-[0;32m[ RUN      ] [mBadDynamicFixture1.TestBase
-DynamicFixture()
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite BadDynamicFixture1,
-test FixtureBase is defined using TEST_F but
-test TestBase is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-~DynamicFixture()
-[0;31m[  FAILED  ] [mBadDynamicFixture1.TestBase
-DynamicFixture::TearDownTestSuite
-[0;32m[----------] [m2 tests from BadDynamicFixture2
-DynamicFixture::SetUpTestSuite
-[0;32m[ RUN      ] [mBadDynamicFixture2.FixtureBase
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[0;32m[       OK ] [mBadDynamicFixture2.FixtureBase
-[0;32m[ RUN      ] [mBadDynamicFixture2.Derived
-DynamicFixture()
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite BadDynamicFixture2,
-you defined test FixtureBase and test Derived
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-~DynamicFixture()
-[0;31m[  FAILED  ] [mBadDynamicFixture2.Derived
-DynamicFixture::TearDownTestSuite
-[0;32m[----------] [m1 test from PrintingFailingParams/FailingParamTest
-[0;32m[ RUN      ] [mPrintingFailingParams/FailingParamTest.Fails/0
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  GetParam()
-    Which is: 2
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mPrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
-[0;32m[----------] [m1 test from EmptyBasenameParamInst
-[0;32m[ RUN      ] [mEmptyBasenameParamInst.Passes/0
-[0;32m[       OK ] [mEmptyBasenameParamInst.Passes/0
-[0;32m[----------] [m2 tests from PrintingStrings/ParamTest
-[0;32m[ RUN      ] [mPrintingStrings/ParamTest.Success/a
-[0;32m[       OK ] [mPrintingStrings/ParamTest.Success/a
-[0;32m[ RUN      ] [mPrintingStrings/ParamTest.Failure/a
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  "b"
-  GetParam()
-    Which is: "a"
-Expected failure
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mPrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-[0;32m[----------] [m3 tests from GoogleTestVerification
-[0;32m[ RUN      ] [mGoogleTestVerification.UninstantiatedParameterizedTestSuite<NoTests>
-googletest-output-test_.cc:#: Failure
-Parameterized test suite NoTests is instantiated via INSTANTIATE_TEST_SUITE_P, but no tests are defined via TEST_P . No test cases will run.
-
-Ideally, INSTANTIATE_TEST_SUITE_P should only ever be invoked from code that always depend on code that provides TEST_P. Failing to do so is often an indication of dead code, e.g. the last TEST_P was removed but the rest got left behind.
-
-To suppress this error for this test suite, insert the following line (in a non-header) in the namespace it is defined in:
-
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(NoTests);
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mGoogleTestVerification.UninstantiatedParameterizedTestSuite<NoTests>
-[0;32m[ RUN      ] [mGoogleTestVerification.UninstantiatedParameterizedTestSuite<DetectNotInstantiatedTest>
-googletest-output-test_.cc:#: Failure
-Parameterized test suite DetectNotInstantiatedTest is defined via TEST_P, but never instantiated. None of the test cases will run. Either no INSTANTIATE_TEST_SUITE_P is provided or the only ones provided expand to nothing.
-
-Ideally, TEST_P definitions should only ever be included as part of binaries that intend to use them. (As opposed to, for example, being placed in a library that may be linked in to get other utilities.)
-
-To suppress this error for this test suite, insert the following line (in a non-header) in the namespace it is defined in:
-
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(DetectNotInstantiatedTest);
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mGoogleTestVerification.UninstantiatedParameterizedTestSuite<DetectNotInstantiatedTest>
-[0;32m[ RUN      ] [mGoogleTestVerification.UninstantiatedTypeParameterizedTestSuite<DetectNotInstantiatedTypesTest>
-googletest-output-test_.cc:#: Failure
-Type parameterized test suite DetectNotInstantiatedTypesTest is defined via REGISTER_TYPED_TEST_SUITE_P, but never instantiated via INSTANTIATE_TYPED_TEST_SUITE_P. None of the test cases will run.
-
-Ideally, TYPED_TEST_P definitions should only ever be included as part of binaries that intend to use them. (As opposed to, for example, being placed in a library that may be linked in to get other utilities.)
-
-To suppress this error for this test suite, insert the following line (in a non-header) in the namespace it is defined in:
-
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(DetectNotInstantiatedTypesTest);
-Stack trace: (omitted)
-
-[0;31m[  FAILED  ] [mGoogleTestVerification.UninstantiatedTypeParameterizedTestSuite<DetectNotInstantiatedTypesTest>
-[0;32m[----------] [mGlobal test environment tear-down
-BarEnvironment::TearDown() called.
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-FooEnvironment::TearDown() called.
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-[0;32m[==========] [m88 tests from 41 test suites ran.
-[0;32m[  PASSED  ] [m31 tests.
-[0;31m[  FAILED  ] [m57 tests, listed below:
-[0;31m[  FAILED  ] [mNonfatalFailureTest.EscapesStringOperands
-[0;31m[  FAILED  ] [mNonfatalFailureTest.DiffForLongStrings
-[0;31m[  FAILED  ] [mFatalFailureTest.FatalFailureInSubroutine
-[0;31m[  FAILED  ] [mFatalFailureTest.FatalFailureInNestedSubroutine
-[0;31m[  FAILED  ] [mFatalFailureTest.NonfatalFailureInSubroutine
-[0;31m[  FAILED  ] [mLoggingTest.InterleavingLoggingAndAssertions
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.AcceptedValues
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.ObeysScopes
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.WorksInLoop
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.WorksInSubroutine
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.CanBeNested
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.CanBeRepeated
-[0;31m[  FAILED  ] [mSCOPED_TRACETest.WorksConcurrently
-[0;31m[  FAILED  ] [mScopedTraceTest.WithExplicitFileAndLine
-[0;31m[  FAILED  ] [mNonFatalFailureInFixtureConstructorTest.FailureInConstructor
-[0;31m[  FAILED  ] [mFatalFailureInFixtureConstructorTest.FailureInConstructor
-[0;31m[  FAILED  ] [mNonFatalFailureInSetUpTest.FailureInSetUp
-[0;31m[  FAILED  ] [mFatalFailureInSetUpTest.FailureInSetUp
-[0;31m[  FAILED  ] [mAddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-[0;31m[  FAILED  ] [mGtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-[0;31m[  FAILED  ] [mMixedUpTestSuiteTest.ThisShouldFail
-[0;31m[  FAILED  ] [mMixedUpTestSuiteTest.ThisShouldFailToo
-[0;31m[  FAILED  ] [mMixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[0;31m[  FAILED  ] [mTEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-[0;31m[  FAILED  ] [mTEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenStatementReturns
-[0;31m[  FAILED  ] [mExpectNonfatalFailureTest.FailsWhenStatementThrows
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenStatementReturns
-[0;31m[  FAILED  ] [mExpectFatalFailureTest.FailsWhenStatementThrows
-[0;31m[  FAILED  ] [mTypedTest/0.Failure, where TypeParam = int
-[0;31m[  FAILED  ] [mTypedTestWithNames/char0.Failure, where TypeParam = char
-[0;31m[  FAILED  ] [mTypedTestWithNames/int1.Failure, where TypeParam = int
-[0;31m[  FAILED  ] [mUnsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
-[0;31m[  FAILED  ] [mUnsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
-[0;31m[  FAILED  ] [mUnsignedCustomName/TypedTestP/unsignedChar0.Failure, where TypeParam = unsigned char
-[0;31m[  FAILED  ] [mUnsignedCustomName/TypedTestP/unsignedInt1.Failure, where TypeParam = unsigned int
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectFatalFailure
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectNonFatalFailure
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectFatalFailureOnAllThreads
-[0;31m[  FAILED  ] [mExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-[0;31m[  FAILED  ] [mExpectFailureWithThreadsTest.ExpectFatalFailure
-[0;31m[  FAILED  ] [mExpectFailureWithThreadsTest.ExpectNonFatalFailure
-[0;31m[  FAILED  ] [mScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-[0;31m[  FAILED  ] [mDynamicFixture.DynamicTestFail
-[0;31m[  FAILED  ] [mBadDynamicFixture1.TestBase
-[0;31m[  FAILED  ] [mBadDynamicFixture2.Derived
-[0;31m[  FAILED  ] [mPrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
-[0;31m[  FAILED  ] [mPrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-[0;31m[  FAILED  ] [mGoogleTestVerification.UninstantiatedParameterizedTestSuite<NoTests>
-[0;31m[  FAILED  ] [mGoogleTestVerification.UninstantiatedParameterizedTestSuite<DetectNotInstantiatedTest>
-[0;31m[  FAILED  ] [mGoogleTestVerification.UninstantiatedTypeParameterizedTestSuite<DetectNotInstantiatedTypesTest>
-
-57 FAILED TESTS
-[0;33m  YOU HAVE 1 DISABLED TEST
-
-[mNote: Google Test filter = FatalFailureTest.*:LoggingTest.*
-[==========] Running 4 tests from 2 test suites.
-[----------] Global test environment set-up.
-[----------] 3 tests from FatalFailureTest
-[ RUN      ] FatalFailureTest.FatalFailureInSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine (? ms)
-[ RUN      ] FatalFailureTest.FatalFailureInNestedSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine (? ms)
-[ RUN      ] FatalFailureTest.NonfatalFailureInSubroutine
-(expecting a failure on false)
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine (? ms)
-[----------] 3 tests from FatalFailureTest (? ms total)
-
-[----------] 1 test from LoggingTest
-[ RUN      ] LoggingTest.InterleavingLoggingAndAssertions
-(expecting 2 failures on (3) >= (a[i]))
-i == 0
-i == 1
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 9
-Stack trace: (omitted)
-
-i == 2
-i == 3
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 6
-Stack trace: (omitted)
-
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions (? ms)
-[----------] 1 test from LoggingTest (? ms total)
-
-[----------] Global test environment tear-down
-[==========] 4 tests from 2 test suites ran. (? ms total)
-[  PASSED  ] 0 tests.
-[  FAILED  ] 4 tests, listed below:
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-
- 4 FAILED TESTS
-Note: Google Test filter = *DISABLED_*
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from DisabledTestsWarningTest
-[ RUN      ] DisabledTestsWarningTest.DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning
-[       OK ] DisabledTestsWarningTest.DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran.
-[  PASSED  ] 1 test.
-Note: Google Test filter = PassingTest.*
-Note: This is test shard 2 of 2.
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from PassingTest
-[ RUN      ] PassingTest.PassingTest2
-[       OK ] PassingTest.PassingTest2
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran.
-[  PASSED  ] 1 test.
diff --git a/third_party/googletest/googletest/test/googletest-output-test.py b/third_party/googletest/googletest/test/googletest-output-test.py
deleted file mode 100755
index 09028f6..0000000
--- a/third_party/googletest/googletest/test/googletest-output-test.py
+++ /dev/null
@@ -1,346 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-r"""Tests the text output of Google C++ Testing and Mocking Framework.
-
-To update the golden file:
-googletest_output_test.py --build_dir=BUILD/DIR --gengolden
-where BUILD/DIR contains the built googletest-output-test_ file.
-googletest_output_test.py --gengolden
-googletest_output_test.py
-"""
-
-import difflib
-import os
-import re
-import sys
-import gtest_test_utils
-
-
-# The flag for generating the golden file
-GENGOLDEN_FLAG = '--gengolden'
-CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-IS_WINDOWS = os.name == 'nt'
-
-GOLDEN_NAME = 'googletest-output-test-golden-lin.txt'
-
-PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('googletest-output-test_')
-
-# At least one command we exercise must not have the
-# 'internal_skip_environment_and_ad_hoc_tests' argument.
-COMMAND_LIST_TESTS = ({}, [PROGRAM_PATH, '--gtest_list_tests'])
-COMMAND_WITH_COLOR = ({}, [PROGRAM_PATH, '--gtest_color=yes'])
-COMMAND_WITH_TIME = ({}, [PROGRAM_PATH,
-                          '--gtest_print_time',
-                          'internal_skip_environment_and_ad_hoc_tests',
-                          '--gtest_filter=FatalFailureTest.*:LoggingTest.*'])
-COMMAND_WITH_DISABLED = (
-    {}, [PROGRAM_PATH,
-         '--gtest_also_run_disabled_tests',
-         'internal_skip_environment_and_ad_hoc_tests',
-         '--gtest_filter=*DISABLED_*'])
-COMMAND_WITH_SHARDING = (
-    {'GTEST_SHARD_INDEX': '1', 'GTEST_TOTAL_SHARDS': '2'},
-    [PROGRAM_PATH,
-     'internal_skip_environment_and_ad_hoc_tests',
-     '--gtest_filter=PassingTest.*'])
-
-GOLDEN_PATH = os.path.join(gtest_test_utils.GetSourceDir(), GOLDEN_NAME)
-
-
-def ToUnixLineEnding(s):
-  """Changes all Windows/Mac line endings in s to UNIX line endings."""
-
-  return s.replace('\r\n', '\n').replace('\r', '\n')
-
-
-def RemoveLocations(test_output):
-  """Removes all file location info from a Google Test program's output.
-
-  Args:
-       test_output:  the output of a Google Test program.
-
-  Returns:
-       output with all file location info (in the form of
-       'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
-       'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
-       'FILE_NAME:#: '.
-  """
-
-  return re.sub(r'.*[/\\]((googletest-output-test_|gtest).cc)(\:\d+|\(\d+\))\: ',
-                r'\1:#: ', test_output)
-
-
-def RemoveStackTraceDetails(output):
-  """Removes all stack traces from a Google Test program's output."""
-
-  # *? means "find the shortest string that matches".
-  return re.sub(r'Stack trace:(.|\n)*?\n\n',
-                'Stack trace: (omitted)\n\n', output)
-
-
-def RemoveStackTraces(output):
-  """Removes all traces of stack traces from a Google Test program's output."""
-
-  # *? means "find the shortest string that matches".
-  return re.sub(r'Stack trace:(.|\n)*?\n\n', '', output)
-
-
-def RemoveTime(output):
-  """Removes all time information from a Google Test program's output."""
-
-  return re.sub(r'\(\d+ ms', '(? ms', output)
-
-
-def RemoveTypeInfoDetails(test_output):
-  """Removes compiler-specific type info from Google Test program's output.
-
-  Args:
-       test_output:  the output of a Google Test program.
-
-  Returns:
-       output with type information normalized to canonical form.
-  """
-
-  # some compilers output the name of type 'unsigned int' as 'unsigned'
-  return re.sub(r'unsigned int', 'unsigned', test_output)
-
-
-def NormalizeToCurrentPlatform(test_output):
-  """Normalizes platform specific output details for easier comparison."""
-
-  if IS_WINDOWS:
-    # Removes the color information that is not present on Windows.
-    test_output = re.sub('\x1b\\[(0;3\d)?m', '', test_output)
-    # Changes failure message headers into the Windows format.
-    test_output = re.sub(r': Failure\n', r': error: ', test_output)
-    # Changes file(line_number) to file:line_number.
-    test_output = re.sub(r'((\w|\.)+)\((\d+)\):', r'\1:\3:', test_output)
-
-  return test_output
-
-
-def RemoveTestCounts(output):
-  """Removes test counts from a Google Test program's output."""
-
-  output = re.sub(r'\d+ tests?, listed below',
-                  '? tests, listed below', output)
-  output = re.sub(r'\d+ FAILED TESTS',
-                  '? FAILED TESTS', output)
-  output = re.sub(r'\d+ tests? from \d+ test cases?',
-                  '? tests from ? test cases', output)
-  output = re.sub(r'\d+ tests? from ([a-zA-Z_])',
-                  r'? tests from \1', output)
-  return re.sub(r'\d+ tests?\.', '? tests.', output)
-
-
-def RemoveMatchingTests(test_output, pattern):
-  """Removes output of specified tests from a Google Test program's output.
-
-  This function strips not only the beginning and the end of a test but also
-  all output in between.
-
-  Args:
-    test_output:       A string containing the test output.
-    pattern:           A regex string that matches names of test cases or
-                       tests to remove.
-
-  Returns:
-    Contents of test_output with tests whose names match pattern removed.
-  """
-
-  test_output = re.sub(
-      r'.*\[ RUN      \] .*%s(.|\n)*?\[(  FAILED  |       OK )\] .*%s.*\n' % (
-          pattern, pattern),
-      '',
-      test_output)
-  return re.sub(r'.*%s.*\n' % pattern, '', test_output)
-
-
-def NormalizeOutput(output):
-  """Normalizes output (the output of googletest-output-test_.exe)."""
-
-  output = ToUnixLineEnding(output)
-  output = RemoveLocations(output)
-  output = RemoveStackTraceDetails(output)
-  output = RemoveTime(output)
-  return output
-
-
-def GetShellCommandOutput(env_cmd):
-  """Runs a command in a sub-process, and returns its output in a string.
-
-  Args:
-    env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
-             environment variables to set, and element 1 is a string with
-             the command and any flags.
-
-  Returns:
-    A string with the command's combined standard and diagnostic output.
-  """
-
-  # Spawns cmd in a sub-process, and gets its standard I/O file objects.
-  # Set and save the environment properly.
-  environ = os.environ.copy()
-  environ.update(env_cmd[0])
-  p = gtest_test_utils.Subprocess(env_cmd[1], env=environ)
-
-  return p.output
-
-
-def GetCommandOutput(env_cmd):
-  """Runs a command and returns its output with all file location
-  info stripped off.
-
-  Args:
-    env_cmd:  The shell command. A 2-tuple where element 0 is a dict of extra
-              environment variables to set, and element 1 is a string with
-              the command and any flags.
-  """
-
-  # Disables exception pop-ups on Windows.
-  environ, cmdline = env_cmd
-  environ = dict(environ)  # Ensures we are modifying a copy.
-  environ[CATCH_EXCEPTIONS_ENV_VAR_NAME] = '1'
-  return NormalizeOutput(GetShellCommandOutput((environ, cmdline)))
-
-
-def GetOutputOfAllCommands():
-  """Returns concatenated output from several representative commands."""
-
-  return (GetCommandOutput(COMMAND_WITH_COLOR) +
-          GetCommandOutput(COMMAND_WITH_TIME) +
-          GetCommandOutput(COMMAND_WITH_DISABLED) +
-          GetCommandOutput(COMMAND_WITH_SHARDING))
-
-
-test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
-SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
-SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
-SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
-                            SUPPORTS_TYPED_TESTS and
-                            SUPPORTS_THREADS and
-                            SUPPORTS_STACK_TRACES)
-
-class GTestOutputTest(gtest_test_utils.TestCase):
-  def RemoveUnsupportedTests(self, test_output):
-    if not SUPPORTS_DEATH_TESTS:
-      test_output = RemoveMatchingTests(test_output, 'DeathTest')
-    if not SUPPORTS_TYPED_TESTS:
-      test_output = RemoveMatchingTests(test_output, 'TypedTest')
-      test_output = RemoveMatchingTests(test_output, 'TypedDeathTest')
-      test_output = RemoveMatchingTests(test_output, 'TypeParamDeathTest')
-    if not SUPPORTS_THREADS:
-      test_output = RemoveMatchingTests(test_output,
-                                        'ExpectFailureWithThreadsTest')
-      test_output = RemoveMatchingTests(test_output,
-                                        'ScopedFakeTestPartResultReporterTest')
-      test_output = RemoveMatchingTests(test_output,
-                                        'WorksConcurrently')
-    if not SUPPORTS_STACK_TRACES:
-      test_output = RemoveStackTraces(test_output)
-
-    return test_output
-
-  def testOutput(self):
-    output = GetOutputOfAllCommands()
-
-    golden_file = open(GOLDEN_PATH, 'rb')
-    # A mis-configured source control system can cause \r appear in EOL
-    # sequences when we read the golden file irrespective of an operating
-    # system used. Therefore, we need to strip those \r's from newlines
-    # unconditionally.
-    golden = ToUnixLineEnding(golden_file.read().decode())
-    golden_file.close()
-
-    # We want the test to pass regardless of certain features being
-    # supported or not.
-
-    # We still have to remove type name specifics in all cases.
-    normalized_actual = RemoveTypeInfoDetails(output)
-    normalized_golden = RemoveTypeInfoDetails(golden)
-
-    if CAN_GENERATE_GOLDEN_FILE:
-      self.assertEqual(normalized_golden, normalized_actual,
-                       '\n'.join(difflib.unified_diff(
-                           normalized_golden.split('\n'),
-                           normalized_actual.split('\n'),
-                           'golden', 'actual')))
-    else:
-      normalized_actual = NormalizeToCurrentPlatform(
-          RemoveTestCounts(normalized_actual))
-      normalized_golden = NormalizeToCurrentPlatform(
-          RemoveTestCounts(self.RemoveUnsupportedTests(normalized_golden)))
-
-      # This code is very handy when debugging golden file differences:
-      if os.getenv('DEBUG_GTEST_OUTPUT_TEST'):
-        open(os.path.join(
-            gtest_test_utils.GetSourceDir(),
-            '_googletest-output-test_normalized_actual.txt'), 'wb').write(
-                normalized_actual)
-        open(os.path.join(
-            gtest_test_utils.GetSourceDir(),
-            '_googletest-output-test_normalized_golden.txt'), 'wb').write(
-                normalized_golden)
-
-      self.assertEqual(normalized_golden, normalized_actual)
-
-
-if __name__ == '__main__':
-  if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
-    # unittest.main() can't handle unknown flags
-    sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-  if GENGOLDEN_FLAG in sys.argv:
-    if CAN_GENERATE_GOLDEN_FILE:
-      output = GetOutputOfAllCommands()
-      golden_file = open(GOLDEN_PATH, 'wb')
-      golden_file.write(output.encode())
-      golden_file.close()
-    else:
-      message = (
-          """Unable to write a golden file when compiled in an environment
-that does not support all the required features (death tests,
-typed tests, stack traces, and multiple threads).
-Please build this test and generate the golden file using Blaze on Linux.""")
-
-      sys.stderr.write(message)
-      sys.exit(1)
-  else:
-    gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-output-test_.cc b/third_party/googletest/googletest/test/googletest-output-test_.cc
deleted file mode 100644
index 074f64e..0000000
--- a/third_party/googletest/googletest/test/googletest-output-test_.cc
+++ /dev/null
@@ -1,1108 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The purpose of this file is to generate Google Test output under
-// various conditions.  The output will then be verified by
-// googletest-output-test.py to ensure that Google Test generates the
-// desired messages.  Therefore, most tests in this file are MEANT TO
-// FAIL.
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-#include <stdlib.h>
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127 /* conditional expression is constant */)
-#endif  //  _MSC_VER
-
-#if GTEST_IS_THREADSAFE
-using testing::ScopedFakeTestPartResultReporter;
-using testing::TestPartResultArray;
-
-using testing::internal::Notification;
-using testing::internal::ThreadWithParam;
-#endif
-
-namespace posix = ::testing::internal::posix;
-
-// Tests catching fatal failures.
-
-// A subroutine used by the following test.
-void TestEq1(int x) {
-  ASSERT_EQ(1, x);
-}
-
-// This function calls a test subroutine, catches the fatal failure it
-// generates, and then returns early.
-void TryTestSubroutine() {
-  // Calls a subrountine that yields a fatal failure.
-  TestEq1(2);
-
-  // Catches the fatal failure and aborts the test.
-  //
-  // The testing::Test:: prefix is necessary when calling
-  // HasFatalFailure() outside of a TEST, TEST_F, or test fixture.
-  if (testing::Test::HasFatalFailure()) return;
-
-  // If we get here, something is wrong.
-  FAIL() << "This should never be reached.";
-}
-
-TEST(PassingTest, PassingTest1) {
-}
-
-TEST(PassingTest, PassingTest2) {
-}
-
-// Tests that parameters of failing parameterized tests are printed in the
-// failing test summary.
-class FailingParamTest : public testing::TestWithParam<int> {};
-
-TEST_P(FailingParamTest, Fails) {
-  EXPECT_EQ(1, GetParam());
-}
-
-// This generates a test which will fail. Google Test is expected to print
-// its parameter when it outputs the list of all failed tests.
-INSTANTIATE_TEST_SUITE_P(PrintingFailingParams,
-                         FailingParamTest,
-                         testing::Values(2));
-
-// Tests that an empty value for the test suite basename yields just
-// the test name without any prior /
-class EmptyBasenameParamInst : public testing::TestWithParam<int> {};
-
-TEST_P(EmptyBasenameParamInst, Passes) { EXPECT_EQ(1, GetParam()); }
-
-INSTANTIATE_TEST_SUITE_P(, EmptyBasenameParamInst, testing::Values(1));
-
-static const char kGoldenString[] = "\"Line\0 1\"\nLine 2";
-
-TEST(NonfatalFailureTest, EscapesStringOperands) {
-  std::string actual = "actual \"string\"";
-  EXPECT_EQ(kGoldenString, actual);
-
-  const char* golden = kGoldenString;
-  EXPECT_EQ(golden, actual);
-}
-
-TEST(NonfatalFailureTest, DiffForLongStrings) {
-  std::string golden_str(kGoldenString, sizeof(kGoldenString) - 1);
-  EXPECT_EQ(golden_str, "Line 2");
-}
-
-// Tests catching a fatal failure in a subroutine.
-TEST(FatalFailureTest, FatalFailureInSubroutine) {
-  printf("(expecting a failure that x should be 1)\n");
-
-  TryTestSubroutine();
-}
-
-// Tests catching a fatal failure in a nested subroutine.
-TEST(FatalFailureTest, FatalFailureInNestedSubroutine) {
-  printf("(expecting a failure that x should be 1)\n");
-
-  // Calls a subrountine that yields a fatal failure.
-  TryTestSubroutine();
-
-  // Catches the fatal failure and aborts the test.
-  //
-  // When calling HasFatalFailure() inside a TEST, TEST_F, or test
-  // fixture, the testing::Test:: prefix is not needed.
-  if (HasFatalFailure()) return;
-
-  // If we get here, something is wrong.
-  FAIL() << "This should never be reached.";
-}
-
-// Tests HasFatalFailure() after a failed EXPECT check.
-TEST(FatalFailureTest, NonfatalFailureInSubroutine) {
-  printf("(expecting a failure on false)\n");
-  EXPECT_TRUE(false);  // Generates a nonfatal failure
-  ASSERT_FALSE(HasFatalFailure());  // This should succeed.
-}
-
-// Tests interleaving user logging and Google Test assertions.
-TEST(LoggingTest, InterleavingLoggingAndAssertions) {
-  static const int a[4] = {
-    3, 9, 2, 6
-  };
-
-  printf("(expecting 2 failures on (3) >= (a[i]))\n");
-  for (int i = 0; i < static_cast<int>(sizeof(a)/sizeof(*a)); i++) {
-    printf("i == %d\n", i);
-    EXPECT_GE(3, a[i]);
-  }
-}
-
-// Tests the SCOPED_TRACE macro.
-
-// A helper function for testing SCOPED_TRACE.
-void SubWithoutTrace(int n) {
-  EXPECT_EQ(1, n);
-  ASSERT_EQ(2, n);
-}
-
-// Another helper function for testing SCOPED_TRACE.
-void SubWithTrace(int n) {
-  SCOPED_TRACE(testing::Message() << "n = " << n);
-
-  SubWithoutTrace(n);
-}
-
-TEST(SCOPED_TRACETest, AcceptedValues) {
-  SCOPED_TRACE("literal string");
-  SCOPED_TRACE(std::string("std::string"));
-  SCOPED_TRACE(1337);  // streamable type
-  const char* null_value = nullptr;
-  SCOPED_TRACE(null_value);
-
-  ADD_FAILURE() << "Just checking that all these values work fine.";
-}
-
-// Tests that SCOPED_TRACE() obeys lexical scopes.
-TEST(SCOPED_TRACETest, ObeysScopes) {
-  printf("(expected to fail)\n");
-
-  // There should be no trace before SCOPED_TRACE() is invoked.
-  ADD_FAILURE() << "This failure is expected, and shouldn't have a trace.";
-
-  {
-    SCOPED_TRACE("Expected trace");
-    // After SCOPED_TRACE(), a failure in the current scope should contain
-    // the trace.
-    ADD_FAILURE() << "This failure is expected, and should have a trace.";
-  }
-
-  // Once the control leaves the scope of the SCOPED_TRACE(), there
-  // should be no trace again.
-  ADD_FAILURE() << "This failure is expected, and shouldn't have a trace.";
-}
-
-// Tests that SCOPED_TRACE works inside a loop.
-TEST(SCOPED_TRACETest, WorksInLoop) {
-  printf("(expected to fail)\n");
-
-  for (int i = 1; i <= 2; i++) {
-    SCOPED_TRACE(testing::Message() << "i = " << i);
-
-    SubWithoutTrace(i);
-  }
-}
-
-// Tests that SCOPED_TRACE works in a subroutine.
-TEST(SCOPED_TRACETest, WorksInSubroutine) {
-  printf("(expected to fail)\n");
-
-  SubWithTrace(1);
-  SubWithTrace(2);
-}
-
-// Tests that SCOPED_TRACE can be nested.
-TEST(SCOPED_TRACETest, CanBeNested) {
-  printf("(expected to fail)\n");
-
-  SCOPED_TRACE("");  // A trace without a message.
-
-  SubWithTrace(2);
-}
-
-// Tests that multiple SCOPED_TRACEs can be used in the same scope.
-TEST(SCOPED_TRACETest, CanBeRepeated) {
-  printf("(expected to fail)\n");
-
-  SCOPED_TRACE("A");
-  ADD_FAILURE()
-      << "This failure is expected, and should contain trace point A.";
-
-  SCOPED_TRACE("B");
-  ADD_FAILURE()
-      << "This failure is expected, and should contain trace point A and B.";
-
-  {
-    SCOPED_TRACE("C");
-    ADD_FAILURE() << "This failure is expected, and should "
-                  << "contain trace point A, B, and C.";
-  }
-
-  SCOPED_TRACE("D");
-  ADD_FAILURE() << "This failure is expected, and should "
-                << "contain trace point A, B, and D.";
-}
-
-#if GTEST_IS_THREADSAFE
-// Tests that SCOPED_TRACE()s can be used concurrently from multiple
-// threads.  Namely, an assertion should be affected by
-// SCOPED_TRACE()s in its own thread only.
-
-// Here's the sequence of actions that happen in the test:
-//
-//   Thread A (main)                | Thread B (spawned)
-//   ===============================|================================
-//   spawns thread B                |
-//   -------------------------------+--------------------------------
-//   waits for n1                   | SCOPED_TRACE("Trace B");
-//                                  | generates failure #1
-//                                  | notifies n1
-//   -------------------------------+--------------------------------
-//   SCOPED_TRACE("Trace A");       | waits for n2
-//   generates failure #2           |
-//   notifies n2                    |
-//   -------------------------------|--------------------------------
-//   waits for n3                   | generates failure #3
-//                                  | trace B dies
-//                                  | generates failure #4
-//                                  | notifies n3
-//   -------------------------------|--------------------------------
-//   generates failure #5           | finishes
-//   trace A dies                   |
-//   generates failure #6           |
-//   -------------------------------|--------------------------------
-//   waits for thread B to finish   |
-
-struct CheckPoints {
-  Notification n1;
-  Notification n2;
-  Notification n3;
-};
-
-static void ThreadWithScopedTrace(CheckPoints* check_points) {
-  {
-    SCOPED_TRACE("Trace B");
-    ADD_FAILURE()
-        << "Expected failure #1 (in thread B, only trace B alive).";
-    check_points->n1.Notify();
-    check_points->n2.WaitForNotification();
-
-    ADD_FAILURE()
-        << "Expected failure #3 (in thread B, trace A & B both alive).";
-  }  // Trace B dies here.
-  ADD_FAILURE()
-      << "Expected failure #4 (in thread B, only trace A alive).";
-  check_points->n3.Notify();
-}
-
-TEST(SCOPED_TRACETest, WorksConcurrently) {
-  printf("(expecting 6 failures)\n");
-
-  CheckPoints check_points;
-  ThreadWithParam<CheckPoints*> thread(&ThreadWithScopedTrace, &check_points,
-                                       nullptr);
-  check_points.n1.WaitForNotification();
-
-  {
-    SCOPED_TRACE("Trace A");
-    ADD_FAILURE()
-        << "Expected failure #2 (in thread A, trace A & B both alive).";
-    check_points.n2.Notify();
-    check_points.n3.WaitForNotification();
-
-    ADD_FAILURE()
-        << "Expected failure #5 (in thread A, only trace A alive).";
-  }  // Trace A dies here.
-  ADD_FAILURE()
-      << "Expected failure #6 (in thread A, no trace alive).";
-  thread.Join();
-}
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests basic functionality of the ScopedTrace utility (most of its features
-// are already tested in SCOPED_TRACETest).
-TEST(ScopedTraceTest, WithExplicitFileAndLine) {
-  testing::ScopedTrace trace("explicit_file.cc", 123, "expected trace message");
-  ADD_FAILURE() << "Check that the trace is attached to a particular location.";
-}
-
-TEST(DisabledTestsWarningTest,
-     DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning) {
-  // This test body is intentionally empty.  Its sole purpose is for
-  // verifying that the --gtest_also_run_disabled_tests flag
-  // suppresses the "YOU HAVE 12 DISABLED TESTS" warning at the end of
-  // the test output.
-}
-
-// Tests using assertions outside of TEST and TEST_F.
-//
-// This function creates two failures intentionally.
-void AdHocTest() {
-  printf("The non-test part of the code is expected to have 2 failures.\n\n");
-  EXPECT_TRUE(false);
-  EXPECT_EQ(2, 3);
-}
-
-// Runs all TESTs, all TEST_Fs, and the ad hoc test.
-int RunAllTests() {
-  AdHocTest();
-  return RUN_ALL_TESTS();
-}
-
-// Tests non-fatal failures in the fixture constructor.
-class NonFatalFailureInFixtureConstructorTest : public testing::Test {
- protected:
-  NonFatalFailureInFixtureConstructorTest() {
-    printf("(expecting 5 failures)\n");
-    ADD_FAILURE() << "Expected failure #1, in the test fixture c'tor.";
-  }
-
-  ~NonFatalFailureInFixtureConstructorTest() override {
-    ADD_FAILURE() << "Expected failure #5, in the test fixture d'tor.";
-  }
-
-  void SetUp() override { ADD_FAILURE() << "Expected failure #2, in SetUp()."; }
-
-  void TearDown() override {
-    ADD_FAILURE() << "Expected failure #4, in TearDown.";
-  }
-};
-
-TEST_F(NonFatalFailureInFixtureConstructorTest, FailureInConstructor) {
-  ADD_FAILURE() << "Expected failure #3, in the test body.";
-}
-
-// Tests fatal failures in the fixture constructor.
-class FatalFailureInFixtureConstructorTest : public testing::Test {
- protected:
-  FatalFailureInFixtureConstructorTest() {
-    printf("(expecting 2 failures)\n");
-    Init();
-  }
-
-  ~FatalFailureInFixtureConstructorTest() override {
-    ADD_FAILURE() << "Expected failure #2, in the test fixture d'tor.";
-  }
-
-  void SetUp() override {
-    ADD_FAILURE() << "UNEXPECTED failure in SetUp().  "
-                  << "We should never get here, as the test fixture c'tor "
-                  << "had a fatal failure.";
-  }
-
-  void TearDown() override {
-    ADD_FAILURE() << "UNEXPECTED failure in TearDown().  "
-                  << "We should never get here, as the test fixture c'tor "
-                  << "had a fatal failure.";
-  }
-
- private:
-  void Init() {
-    FAIL() << "Expected failure #1, in the test fixture c'tor.";
-  }
-};
-
-TEST_F(FatalFailureInFixtureConstructorTest, FailureInConstructor) {
-  ADD_FAILURE() << "UNEXPECTED failure in the test body.  "
-                << "We should never get here, as the test fixture c'tor "
-                << "had a fatal failure.";
-}
-
-// Tests non-fatal failures in SetUp().
-class NonFatalFailureInSetUpTest : public testing::Test {
- protected:
-  ~NonFatalFailureInSetUpTest() override { Deinit(); }
-
-  void SetUp() override {
-    printf("(expecting 4 failures)\n");
-    ADD_FAILURE() << "Expected failure #1, in SetUp().";
-  }
-
-  void TearDown() override { FAIL() << "Expected failure #3, in TearDown()."; }
-
- private:
-  void Deinit() {
-    FAIL() << "Expected failure #4, in the test fixture d'tor.";
-  }
-};
-
-TEST_F(NonFatalFailureInSetUpTest, FailureInSetUp) {
-  FAIL() << "Expected failure #2, in the test function.";
-}
-
-// Tests fatal failures in SetUp().
-class FatalFailureInSetUpTest : public testing::Test {
- protected:
-  ~FatalFailureInSetUpTest() override { Deinit(); }
-
-  void SetUp() override {
-    printf("(expecting 3 failures)\n");
-    FAIL() << "Expected failure #1, in SetUp().";
-  }
-
-  void TearDown() override { FAIL() << "Expected failure #2, in TearDown()."; }
-
- private:
-  void Deinit() {
-    FAIL() << "Expected failure #3, in the test fixture d'tor.";
-  }
-};
-
-TEST_F(FatalFailureInSetUpTest, FailureInSetUp) {
-  FAIL() << "UNEXPECTED failure in the test function.  "
-         << "We should never get here, as SetUp() failed.";
-}
-
-TEST(AddFailureAtTest, MessageContainsSpecifiedFileAndLineNumber) {
-  ADD_FAILURE_AT("foo.cc", 42) << "Expected nonfatal failure in foo.cc";
-}
-
-TEST(GtestFailAtTest, MessageContainsSpecifiedFileAndLineNumber) {
-  GTEST_FAIL_AT("foo.cc", 42) << "Expected fatal failure in foo.cc";
-}
-
-// The MixedUpTestSuiteTest test case verifies that Google Test will fail a
-// test if it uses a different fixture class than what other tests in
-// the same test case use.  It deliberately contains two fixture
-// classes with the same name but defined in different namespaces.
-
-// The MixedUpTestSuiteWithSameTestNameTest test case verifies that
-// when the user defines two tests with the same test case name AND
-// same test name (but in different namespaces), the second test will
-// fail.
-
-namespace foo {
-
-class MixedUpTestSuiteTest : public testing::Test {
-};
-
-TEST_F(MixedUpTestSuiteTest, FirstTestFromNamespaceFoo) {}
-TEST_F(MixedUpTestSuiteTest, SecondTestFromNamespaceFoo) {}
-
-class MixedUpTestSuiteWithSameTestNameTest : public testing::Test {
-};
-
-TEST_F(MixedUpTestSuiteWithSameTestNameTest,
-       TheSecondTestWithThisNameShouldFail) {}
-
-}  // namespace foo
-
-namespace bar {
-
-class MixedUpTestSuiteTest : public testing::Test {
-};
-
-// The following two tests are expected to fail.  We rely on the
-// golden file to check that Google Test generates the right error message.
-TEST_F(MixedUpTestSuiteTest, ThisShouldFail) {}
-TEST_F(MixedUpTestSuiteTest, ThisShouldFailToo) {}
-
-class MixedUpTestSuiteWithSameTestNameTest : public testing::Test {
-};
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST_F(MixedUpTestSuiteWithSameTestNameTest,
-       TheSecondTestWithThisNameShouldFail) {}
-
-}  // namespace bar
-
-// The following two test cases verify that Google Test catches the user
-// error of mixing TEST and TEST_F in the same test case.  The first
-// test case checks the scenario where TEST_F appears before TEST, and
-// the second one checks where TEST appears before TEST_F.
-
-class TEST_F_before_TEST_in_same_test_case : public testing::Test {
-};
-
-TEST_F(TEST_F_before_TEST_in_same_test_case, DefinedUsingTEST_F) {}
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST(TEST_F_before_TEST_in_same_test_case, DefinedUsingTESTAndShouldFail) {}
-
-class TEST_before_TEST_F_in_same_test_case : public testing::Test {
-};
-
-TEST(TEST_before_TEST_F_in_same_test_case, DefinedUsingTEST) {}
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST_F(TEST_before_TEST_F_in_same_test_case, DefinedUsingTEST_FAndShouldFail) {
-}
-
-// Used for testing EXPECT_NONFATAL_FAILURE() and EXPECT_FATAL_FAILURE().
-int global_integer = 0;
-
-// Tests that EXPECT_NONFATAL_FAILURE() can reference global variables.
-TEST(ExpectNonfatalFailureTest, CanReferenceGlobalVariables) {
-  global_integer = 0;
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_EQ(1, global_integer) << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() can reference local variables
-// (static or not).
-TEST(ExpectNonfatalFailureTest, CanReferenceLocalVariables) {
-  int m = 0;
-  static int n;
-  n = 1;
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_EQ(m, n) << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() succeeds when there is exactly
-// one non-fatal failure and no fatal failure.
-TEST(ExpectNonfatalFailureTest, SucceedsWhenThereIsOneNonfatalFailure) {
-  EXPECT_NONFATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there is no
-// non-fatal failure.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereIsNoNonfatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there are two
-// non-fatal failures.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereAreTwoNonfatalFailures) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure 1.";
-    ADD_FAILURE() << "Expected non-fatal failure 2.";
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there is one fatal
-// failure.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereIsOneFatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    FAIL() << "Expected fatal failure.";
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when the statement being
-// tested returns.
-TEST(ExpectNonfatalFailureTest, FailsWhenStatementReturns) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    return;
-  }, "");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when the statement being
-// tested throws.
-TEST(ExpectNonfatalFailureTest, FailsWhenStatementThrows) {
-  printf("(expecting a failure)\n");
-  try {
-    EXPECT_NONFATAL_FAILURE({
-      throw 0;
-    }, "");
-  } catch(int) {  // NOLINT
-  }
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_FATAL_FAILURE() can reference global variables.
-TEST(ExpectFatalFailureTest, CanReferenceGlobalVariables) {
-  global_integer = 0;
-  EXPECT_FATAL_FAILURE({
-    ASSERT_EQ(1, global_integer) << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() can reference local static
-// variables.
-TEST(ExpectFatalFailureTest, CanReferenceLocalStaticVariables) {
-  static int n;
-  n = 1;
-  EXPECT_FATAL_FAILURE({
-    ASSERT_EQ(0, n) << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() succeeds when there is exactly
-// one fatal failure and no non-fatal failure.
-TEST(ExpectFatalFailureTest, SucceedsWhenThereIsOneFatalFailure) {
-  EXPECT_FATAL_FAILURE({
-    FAIL() << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there is no fatal
-// failure.
-TEST(ExpectFatalFailureTest, FailsWhenThereIsNoFatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-  }, "");
-}
-
-// A helper for generating a fatal failure.
-void FatalFailure() {
-  FAIL() << "Expected fatal failure.";
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there are two
-// fatal failures.
-TEST(ExpectFatalFailureTest, FailsWhenThereAreTwoFatalFailures) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    FatalFailure();
-    FatalFailure();
-  }, "");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there is one non-fatal
-// failure.
-TEST(ExpectFatalFailureTest, FailsWhenThereIsOneNonfatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }, "");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when the statement being
-// tested returns.
-TEST(ExpectFatalFailureTest, FailsWhenStatementReturns) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    return;
-  }, "");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_FATAL_FAILURE() fails when the statement being
-// tested throws.
-TEST(ExpectFatalFailureTest, FailsWhenStatementThrows) {
-  printf("(expecting a failure)\n");
-  try {
-    EXPECT_FATAL_FAILURE({
-      throw 0;
-    }, "");
-  } catch(int) {  // NOLINT
-  }
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// This #ifdef block tests the output of value-parameterized tests.
-
-std::string ParamNameFunc(const testing::TestParamInfo<std::string>& info) {
-  return info.param;
-}
-
-class ParamTest : public testing::TestWithParam<std::string> {
-};
-
-TEST_P(ParamTest, Success) {
-  EXPECT_EQ("a", GetParam());
-}
-
-TEST_P(ParamTest, Failure) {
-  EXPECT_EQ("b", GetParam()) << "Expected failure";
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintingStrings,
-                         ParamTest,
-                         testing::Values(std::string("a")),
-                         ParamNameFunc);
-
-// The case where a suite has INSTANTIATE_TEST_SUITE_P but not TEST_P.
-using NoTests = ParamTest;
-INSTANTIATE_TEST_SUITE_P(ThisIsOdd, NoTests, ::testing::Values("Hello"));
-
-// fails under kErrorOnUninstantiatedParameterizedTest=true
-class DetectNotInstantiatedTest : public testing::TestWithParam<int> {};
-TEST_P(DetectNotInstantiatedTest, Used) { }
-
-// This would make the test failure from the above go away.
-// INSTANTIATE_TEST_SUITE_P(Fix, DetectNotInstantiatedTest, testing::Values(1));
-
-template <typename T>
-class TypedTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE(TypedTest, testing::Types<int>);
-
-TYPED_TEST(TypedTest, Success) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-TYPED_TEST(TypedTest, Failure) {
-  EXPECT_EQ(1, TypeParam()) << "Expected failure";
-}
-
-typedef testing::Types<char, int> TypesForTestWithNames;
-
-template <typename T>
-class TypedTestWithNames : public testing::Test {};
-
-class TypedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value)
-      return std::string("char") + ::testing::PrintToString(i);
-    if (std::is_same<T, int>::value)
-      return std::string("int") + ::testing::PrintToString(i);
-  }
-};
-
-TYPED_TEST_SUITE(TypedTestWithNames, TypesForTestWithNames, TypedTestNames);
-
-TYPED_TEST(TypedTestWithNames, Success) {}
-
-TYPED_TEST(TypedTestWithNames, Failure) { FAIL(); }
-
-template <typename T>
-class TypedTestP : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP);
-
-TYPED_TEST_P(TypedTestP, Success) {
-  EXPECT_EQ(0U, TypeParam());
-}
-
-TYPED_TEST_P(TypedTestP, Failure) {
-  EXPECT_EQ(1U, TypeParam()) << "Expected failure";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP, Success, Failure);
-
-typedef testing::Types<unsigned char, unsigned int> UnsignedTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(Unsigned, TypedTestP, UnsignedTypes);
-
-class TypedTestPNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, unsigned char>::value) {
-      return std::string("unsignedChar") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, unsigned int>::value) {
-      return std::string("unsignedInt") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-INSTANTIATE_TYPED_TEST_SUITE_P(UnsignedCustomName, TypedTestP, UnsignedTypes,
-                              TypedTestPNames);
-
-template <typename T>
-class DetectNotInstantiatedTypesTest : public testing::Test {};
-TYPED_TEST_SUITE_P(DetectNotInstantiatedTypesTest);
-TYPED_TEST_P(DetectNotInstantiatedTypesTest, Used) {
-  TypeParam instantiate;
-  (void)instantiate;
-}
-REGISTER_TYPED_TEST_SUITE_P(DetectNotInstantiatedTypesTest, Used);
-
-// kErrorOnUninstantiatedTypeParameterizedTest=true would make the above fail.
-// Adding the following would make that test failure go away.
-//
-// typedef ::testing::Types<char, int, unsigned int> MyTypes;
-// INSTANTIATE_TYPED_TEST_SUITE_P(All, DetectNotInstantiatedTypesTest, MyTypes);
-
-#if GTEST_HAS_DEATH_TEST
-
-// We rely on the golden file to verify that tests whose test case
-// name ends with DeathTest are run first.
-
-TEST(ADeathTest, ShouldRunFirst) {
-}
-
-// We rely on the golden file to verify that typed tests whose test
-// case name ends with DeathTest are run first.
-
-template <typename T>
-class ATypedDeathTest : public testing::Test {
-};
-
-typedef testing::Types<int, double> NumericTypes;
-TYPED_TEST_SUITE(ATypedDeathTest, NumericTypes);
-
-TYPED_TEST(ATypedDeathTest, ShouldRunFirst) {
-}
-
-
-// We rely on the golden file to verify that type-parameterized tests
-// whose test case name ends with DeathTest are run first.
-
-template <typename T>
-class ATypeParamDeathTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(ATypeParamDeathTest);
-
-TYPED_TEST_P(ATypeParamDeathTest, ShouldRunFirst) {
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ATypeParamDeathTest, ShouldRunFirst);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, ATypeParamDeathTest, NumericTypes);
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Tests various failure conditions of
-// EXPECT_{,NON}FATAL_FAILURE{,_ON_ALL_THREADS}.
-class ExpectFailureTest : public testing::Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  enum FailureMode {
-    FATAL_FAILURE,
-    NONFATAL_FAILURE
-  };
-  static void AddFailure(FailureMode failure) {
-    if (failure == FATAL_FAILURE) {
-      FAIL() << "Expected fatal failure.";
-    } else {
-      ADD_FAILURE() << "Expected non-fatal failure.";
-    }
-  }
-};
-
-TEST_F(ExpectFailureTest, ExpectFatalFailure) {
-  // Expected fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(SUCCEED(), "Expected fatal failure.");
-  // Expected fatal failure, but got a non-fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(AddFailure(NONFATAL_FAILURE), "Expected non-fatal "
-                       "failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(AddFailure(FATAL_FAILURE), "Some other fatal failure "
-                       "expected.");
-}
-
-TEST_F(ExpectFailureTest, ExpectNonFatalFailure) {
-  // Expected non-fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(SUCCEED(), "Expected non-fatal failure.");
-  // Expected non-fatal failure, but got a fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailure(FATAL_FAILURE), "Expected fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailure(NONFATAL_FAILURE), "Some other non-fatal "
-                          "failure.");
-}
-
-#if GTEST_IS_THREADSAFE
-
-class ExpectFailureWithThreadsTest : public ExpectFailureTest {
- protected:
-  static void AddFailureInOtherThread(FailureMode failure) {
-    ThreadWithParam<FailureMode> thread(&AddFailure, failure, nullptr);
-    thread.Join();
-  }
-};
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectFatalFailure) {
-  // We only intercept the current thread.
-  printf("(expecting 2 failures)\n");
-  EXPECT_FATAL_FAILURE(AddFailureInOtherThread(FATAL_FAILURE),
-                       "Expected fatal failure.");
-}
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectNonFatalFailure) {
-  // We only intercept the current thread.
-  printf("(expecting 2 failures)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailureInOtherThread(NONFATAL_FAILURE),
-                          "Expected non-fatal failure.");
-}
-
-typedef ExpectFailureWithThreadsTest ScopedFakeTestPartResultReporterTest;
-
-// Tests that the ScopedFakeTestPartResultReporter only catches failures from
-// the current thread if it is instantiated with INTERCEPT_ONLY_CURRENT_THREAD.
-TEST_F(ScopedFakeTestPartResultReporterTest, InterceptOnlyCurrentThread) {
-  printf("(expecting 2 failures)\n");
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ONLY_CURRENT_THREAD,
-        &results);
-    AddFailureInOtherThread(FATAL_FAILURE);
-    AddFailureInOtherThread(NONFATAL_FAILURE);
-  }
-  // The two failures should not have been intercepted.
-  EXPECT_EQ(0, results.size()) << "This shouldn't fail.";
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-TEST_F(ExpectFailureTest, ExpectFatalFailureOnAllThreads) {
-  // Expected fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(SUCCEED(), "Expected fatal failure.");
-  // Expected fatal failure, but got a non-fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailure(NONFATAL_FAILURE),
-                                      "Expected non-fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailure(FATAL_FAILURE),
-                                      "Some other fatal failure expected.");
-}
-
-TEST_F(ExpectFailureTest, ExpectNonFatalFailureOnAllThreads) {
-  // Expected non-fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(SUCCEED(), "Expected non-fatal "
-                                         "failure.");
-  // Expected non-fatal failure, but got a fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddFailure(FATAL_FAILURE),
-                                         "Expected fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddFailure(NONFATAL_FAILURE),
-                                         "Some other non-fatal failure.");
-}
-
-class DynamicFixture : public testing::Test {
- protected:
-  DynamicFixture() { printf("DynamicFixture()\n"); }
-  ~DynamicFixture() override { printf("~DynamicFixture()\n"); }
-  void SetUp() override { printf("DynamicFixture::SetUp\n"); }
-  void TearDown() override { printf("DynamicFixture::TearDown\n"); }
-
-  static void SetUpTestSuite() { printf("DynamicFixture::SetUpTestSuite\n"); }
-  static void TearDownTestSuite() {
-    printf("DynamicFixture::TearDownTestSuite\n");
-  }
-};
-
-template <bool Pass>
-class DynamicTest : public DynamicFixture {
- public:
-  void TestBody() override { EXPECT_TRUE(Pass); }
-};
-
-auto dynamic_test = (
-    // Register two tests with the same fixture correctly.
-    testing::RegisterTest(
-        "DynamicFixture", "DynamicTestPass", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest(
-        "DynamicFixture", "DynamicTestFail", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<false>; }),
-
-    // Register the same fixture with another name. That's fine.
-    testing::RegisterTest(
-        "DynamicFixtureAnotherName", "DynamicTestPass", nullptr, nullptr,
-        __FILE__, __LINE__,
-        []() -> DynamicFixture* { return new DynamicTest<true>; }),
-
-    // Register two tests with the same fixture incorrectly.
-    testing::RegisterTest(
-        "BadDynamicFixture1", "FixtureBase", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest(
-        "BadDynamicFixture1", "TestBase", nullptr, nullptr, __FILE__, __LINE__,
-        []() -> testing::Test* { return new DynamicTest<true>; }),
-
-    // Register two tests with the same fixture incorrectly by omitting the
-    // return type.
-    testing::RegisterTest(
-        "BadDynamicFixture2", "FixtureBase", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest("BadDynamicFixture2", "Derived", nullptr, nullptr,
-                          __FILE__, __LINE__,
-                          []() { return new DynamicTest<true>; }));
-
-// Two test environments for testing testing::AddGlobalTestEnvironment().
-
-class FooEnvironment : public testing::Environment {
- public:
-  void SetUp() override { printf("%s", "FooEnvironment::SetUp() called.\n"); }
-
-  void TearDown() override {
-    printf("%s", "FooEnvironment::TearDown() called.\n");
-    FAIL() << "Expected fatal failure.";
-  }
-};
-
-class BarEnvironment : public testing::Environment {
- public:
-  void SetUp() override { printf("%s", "BarEnvironment::SetUp() called.\n"); }
-
-  void TearDown() override {
-    printf("%s", "BarEnvironment::TearDown() called.\n");
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }
-};
-
-// The main function.
-//
-// The idea is to use Google Test to run all the tests we have defined (some
-// of them are intended to fail), and then compare the test results
-// with the "golden" file.
-int main(int argc, char **argv) {
-  testing::GTEST_FLAG(print_time) = false;
-
-  // We just run the tests, knowing some of them are intended to fail.
-  // We will use a separate Python script to compare the output of
-  // this program with the golden file.
-
-  // It's hard to test InitGoogleTest() directly, as it has many
-  // global side effects.  The following line serves as a sanity test
-  // for it.
-  testing::InitGoogleTest(&argc, argv);
-  bool internal_skip_environment_and_ad_hoc_tests =
-      std::count(argv, argv + argc,
-                 std::string("internal_skip_environment_and_ad_hoc_tests")) > 0;
-
-#if GTEST_HAS_DEATH_TEST
-  if (testing::internal::GTEST_FLAG(internal_run_death_test) != "") {
-    // Skip the usual output capturing if we're running as the child
-    // process of an threadsafe-style death test.
-# if GTEST_OS_WINDOWS
-    posix::FReopen("nul:", "w", stdout);
-# else
-    posix::FReopen("/dev/null", "w", stdout);
-# endif  // GTEST_OS_WINDOWS
-    return RUN_ALL_TESTS();
-  }
-#endif  // GTEST_HAS_DEATH_TEST
-
-  if (internal_skip_environment_and_ad_hoc_tests)
-    return RUN_ALL_TESTS();
-
-  // Registers two global test environments.
-  // The golden file verifies that they are set up in the order they
-  // are registered, and torn down in the reverse order.
-  testing::AddGlobalTestEnvironment(new FooEnvironment);
-  testing::AddGlobalTestEnvironment(new BarEnvironment);
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4127
-#endif  //  _MSC_VER
-  return RunAllTests();
-}
diff --git a/third_party/googletest/googletest/test/googletest-param-test-invalid-name1-test.py b/third_party/googletest/googletest/test/googletest-param-test-invalid-name1-test.py
deleted file mode 100644
index 2a08477..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test-invalid-name1-test.py
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2015 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-binary_name = 'googletest-param-test-invalid-name1-test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  err = ('Parameterized test name \'"InvalidWithQuotes"\' is invalid')
-
-  p = gtest_test_utils.Subprocess(command)
-  Assert(p.terminated_by_signal)
-
-  # Verify the output message contains appropriate output
-  Assert(err in p.output)
-
-
-class GTestParamTestInvalidName1Test(gtest_test_utils.TestCase):
-
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-param-test-invalid-name1-test_.cc b/third_party/googletest/googletest/test/googletest-param-test-invalid-name1-test_.cc
deleted file mode 100644
index 955d699..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test-invalid-name1-test_.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-namespace {
-class DummyTest : public ::testing::TestWithParam<const char *> {};
-
-TEST_P(DummyTest, Dummy) {
-}
-
-INSTANTIATE_TEST_SUITE_P(InvalidTestName,
-                         DummyTest,
-                         ::testing::Values("InvalidWithQuotes"),
-                         ::testing::PrintToStringParamName());
-
-}  // namespace
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-
diff --git a/third_party/googletest/googletest/test/googletest-param-test-invalid-name2-test.py b/third_party/googletest/googletest/test/googletest-param-test-invalid-name2-test.py
deleted file mode 100644
index ab838f4..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test-invalid-name2-test.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2015 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-binary_name = 'googletest-param-test-invalid-name2-test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  err = ('Duplicate parameterized test name \'a\'')
-
-  p = gtest_test_utils.Subprocess(command)
-  Assert(p.terminated_by_signal)
-
-  # Check for appropriate output
-  Assert(err in p.output)
-
-
-class GTestParamTestInvalidName2Test(gtest_test_utils.TestCase):
-
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-param-test-invalid-name2-test_.cc b/third_party/googletest/googletest/test/googletest-param-test-invalid-name2-test_.cc
deleted file mode 100644
index 76371df..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test-invalid-name2-test_.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-namespace {
-class DummyTest : public ::testing::TestWithParam<const char *> {};
-
-std::string StringParamTestSuffix(
-    const testing::TestParamInfo<const char*>& info) {
-  return std::string(info.param);
-}
-
-TEST_P(DummyTest, Dummy) {
-}
-
-INSTANTIATE_TEST_SUITE_P(DuplicateTestNames,
-                         DummyTest,
-                         ::testing::Values("a", "b", "a", "c"),
-                         StringParamTestSuffix);
-}  // namespace
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-
-
diff --git a/third_party/googletest/googletest/test/googletest-param-test-test.cc b/third_party/googletest/googletest/test/googletest-param-test-test.cc
deleted file mode 100644
index 023aa46..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test-test.cc
+++ /dev/null
@@ -1,1119 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself. This file verifies that the parameter
-// generators objects produce correct parameter sequences and that
-// Google Test runtime instantiates correct tests from those sequences.
-
-#include "gtest/gtest.h"
-
-# include <algorithm>
-# include <iostream>
-# include <list>
-# include <set>
-# include <sstream>
-# include <string>
-# include <vector>
-
-# include "src/gtest-internal-inl.h"  // for UnitTestOptions
-# include "test/googletest-param-test-test.h"
-
-using ::std::vector;
-using ::std::sort;
-
-using ::testing::AddGlobalTestEnvironment;
-using ::testing::Bool;
-using ::testing::Combine;
-using ::testing::Message;
-using ::testing::Range;
-using ::testing::TestWithParam;
-using ::testing::Values;
-using ::testing::ValuesIn;
-
-using ::testing::internal::ParamGenerator;
-using ::testing::internal::UnitTestOptions;
-
-// Prints a value to a string.
-//
-// FIXME: remove PrintValue() when we move matchers and
-// EXPECT_THAT() from Google Mock to Google Test.  At that time, we
-// can write EXPECT_THAT(x, Eq(y)) to compare two tuples x and y, as
-// EXPECT_THAT() and the matchers know how to print tuples.
-template <typename T>
-::std::string PrintValue(const T& value) {
-  return testing::PrintToString(value);
-}
-
-// Verifies that a sequence generated by the generator and accessed
-// via the iterator object matches the expected one using Google Test
-// assertions.
-template <typename T, size_t N>
-void VerifyGenerator(const ParamGenerator<T>& generator,
-                     const T (&expected_values)[N]) {
-  typename ParamGenerator<T>::iterator it = generator.begin();
-  for (size_t i = 0; i < N; ++i) {
-    ASSERT_FALSE(it == generator.end())
-        << "At element " << i << " when accessing via an iterator "
-        << "created with the copy constructor.\n";
-    // We cannot use EXPECT_EQ() here as the values may be tuples,
-    // which don't support <<.
-    EXPECT_TRUE(expected_values[i] == *it)
-        << "where i is " << i
-        << ", expected_values[i] is " << PrintValue(expected_values[i])
-        << ", *it is " << PrintValue(*it)
-        << ", and 'it' is an iterator created with the copy constructor.\n";
-    ++it;
-  }
-  EXPECT_TRUE(it == generator.end())
-        << "At the presumed end of sequence when accessing via an iterator "
-        << "created with the copy constructor.\n";
-
-  // Test the iterator assignment. The following lines verify that
-  // the sequence accessed via an iterator initialized via the
-  // assignment operator (as opposed to a copy constructor) matches
-  // just the same.
-  it = generator.begin();
-  for (size_t i = 0; i < N; ++i) {
-    ASSERT_FALSE(it == generator.end())
-        << "At element " << i << " when accessing via an iterator "
-        << "created with the assignment operator.\n";
-    EXPECT_TRUE(expected_values[i] == *it)
-        << "where i is " << i
-        << ", expected_values[i] is " << PrintValue(expected_values[i])
-        << ", *it is " << PrintValue(*it)
-        << ", and 'it' is an iterator created with the copy constructor.\n";
-    ++it;
-  }
-  EXPECT_TRUE(it == generator.end())
-        << "At the presumed end of sequence when accessing via an iterator "
-        << "created with the assignment operator.\n";
-}
-
-template <typename T>
-void VerifyGeneratorIsEmpty(const ParamGenerator<T>& generator) {
-  typename ParamGenerator<T>::iterator it = generator.begin();
-  EXPECT_TRUE(it == generator.end());
-
-  it = generator.begin();
-  EXPECT_TRUE(it == generator.end());
-}
-
-// Generator tests. They test that each of the provided generator functions
-// generates an expected sequence of values. The general test pattern
-// instantiates a generator using one of the generator functions,
-// checks the sequence produced by the generator using its iterator API,
-// and then resets the iterator back to the beginning of the sequence
-// and checks the sequence again.
-
-// Tests that iterators produced by generator functions conform to the
-// ForwardIterator concept.
-TEST(IteratorTest, ParamIteratorConformsToForwardIteratorConcept) {
-  const ParamGenerator<int> gen = Range(0, 10);
-  ParamGenerator<int>::iterator it = gen.begin();
-
-  // Verifies that iterator initialization works as expected.
-  ParamGenerator<int>::iterator it2 = it;
-  EXPECT_TRUE(*it == *it2) << "Initialized iterators must point to the "
-                           << "element same as its source points to";
-
-  // Verifies that iterator assignment works as expected.
-  ++it;
-  EXPECT_FALSE(*it == *it2);
-  it2 = it;
-  EXPECT_TRUE(*it == *it2) << "Assigned iterators must point to the "
-                           << "element same as its source points to";
-
-  // Verifies that prefix operator++() returns *this.
-  EXPECT_EQ(&it, &(++it)) << "Result of the prefix operator++ must be "
-                          << "refer to the original object";
-
-  // Verifies that the result of the postfix operator++ points to the value
-  // pointed to by the original iterator.
-  int original_value = *it;  // Have to compute it outside of macro call to be
-                             // unaffected by the parameter evaluation order.
-  EXPECT_EQ(original_value, *(it++));
-
-  // Verifies that prefix and postfix operator++() advance an iterator
-  // all the same.
-  it2 = it;
-  ++it;
-  ++it2;
-  EXPECT_TRUE(*it == *it2);
-}
-
-// Tests that Range() generates the expected sequence.
-TEST(RangeTest, IntRangeWithDefaultStep) {
-  const ParamGenerator<int> gen = Range(0, 3);
-  const int expected_values[] = {0, 1, 2};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that Range() generates the single element sequence
-// as expected when provided with range limits that are equal.
-TEST(RangeTest, IntRangeSingleValue) {
-  const ParamGenerator<int> gen = Range(0, 1);
-  const int expected_values[] = {0};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that Range() with generates empty sequence when
-// supplied with an empty range.
-TEST(RangeTest, IntRangeEmpty) {
-  const ParamGenerator<int> gen = Range(0, 0);
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that Range() with custom step (greater then one) generates
-// the expected sequence.
-TEST(RangeTest, IntRangeWithCustomStep) {
-  const ParamGenerator<int> gen = Range(0, 9, 3);
-  const int expected_values[] = {0, 3, 6};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Range() with custom step (greater then one) generates
-// the expected sequence when the last element does not fall on the
-// upper range limit. Sequences generated by Range() must not have
-// elements beyond the range limits.
-TEST(RangeTest, IntRangeWithCustomStepOverUpperBound) {
-  const ParamGenerator<int> gen = Range(0, 4, 3);
-  const int expected_values[] = {0, 3};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Verifies that Range works with user-defined types that define
-// copy constructor, operator=(), operator+(), and operator<().
-class DogAdder {
- public:
-  explicit DogAdder(const char* a_value) : value_(a_value) {}
-  DogAdder(const DogAdder& other) : value_(other.value_.c_str()) {}
-
-  DogAdder operator=(const DogAdder& other) {
-    if (this != &other)
-      value_ = other.value_;
-    return *this;
-  }
-  DogAdder operator+(const DogAdder& other) const {
-    Message msg;
-    msg << value_.c_str() << other.value_.c_str();
-    return DogAdder(msg.GetString().c_str());
-  }
-  bool operator<(const DogAdder& other) const {
-    return value_ < other.value_;
-  }
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-};
-
-TEST(RangeTest, WorksWithACustomType) {
-  const ParamGenerator<DogAdder> gen =
-      Range(DogAdder("cat"), DogAdder("catdogdog"), DogAdder("dog"));
-  ParamGenerator<DogAdder>::iterator it = gen.begin();
-
-  ASSERT_FALSE(it == gen.end());
-  EXPECT_STREQ("cat", it->value().c_str());
-
-  ASSERT_FALSE(++it == gen.end());
-  EXPECT_STREQ("catdog", it->value().c_str());
-
-  EXPECT_TRUE(++it == gen.end());
-}
-
-class IntWrapper {
- public:
-  explicit IntWrapper(int a_value) : value_(a_value) {}
-  IntWrapper(const IntWrapper& other) : value_(other.value_) {}
-
-  IntWrapper operator=(const IntWrapper& other) {
-    value_ = other.value_;
-    return *this;
-  }
-  // operator+() adds a different type.
-  IntWrapper operator+(int other) const { return IntWrapper(value_ + other); }
-  bool operator<(const IntWrapper& other) const {
-    return value_ < other.value_;
-  }
-  int value() const { return value_; }
-
- private:
-  int value_;
-};
-
-TEST(RangeTest, WorksWithACustomTypeWithDifferentIncrementType) {
-  const ParamGenerator<IntWrapper> gen = Range(IntWrapper(0), IntWrapper(2));
-  ParamGenerator<IntWrapper>::iterator it = gen.begin();
-
-  ASSERT_FALSE(it == gen.end());
-  EXPECT_EQ(0, it->value());
-
-  ASSERT_FALSE(++it == gen.end());
-  EXPECT_EQ(1, it->value());
-
-  EXPECT_TRUE(++it == gen.end());
-}
-
-// Tests that ValuesIn() with an array parameter generates
-// the expected sequence.
-TEST(ValuesInTest, ValuesInArray) {
-  int array[] = {3, 5, 8};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Tests that ValuesIn() with a const array parameter generates
-// the expected sequence.
-TEST(ValuesInTest, ValuesInConstArray) {
-  const int array[] = {3, 5, 8};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Edge case. Tests that ValuesIn() with an array parameter containing a
-// single element generates the single element sequence.
-TEST(ValuesInTest, ValuesInSingleElementArray) {
-  int array[] = {42};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Tests that ValuesIn() generates the expected sequence for an STL
-// container (vector).
-TEST(ValuesInTest, ValuesInVector) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(3);
-  values.push_back(5);
-  values.push_back(8);
-  const ParamGenerator<int> gen = ValuesIn(values);
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that ValuesIn() generates the expected sequence.
-TEST(ValuesInTest, ValuesInIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(3);
-  values.push_back(5);
-  values.push_back(8);
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that ValuesIn() provided with an iterator range specifying a
-// single value generates a single-element sequence.
-TEST(ValuesInTest, ValuesInSingleElementIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(42);
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  const int expected_values[] = {42};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that ValuesIn() provided with an empty iterator range
-// generates an empty sequence.
-TEST(ValuesInTest, ValuesInEmptyIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that the Values() generates the expected sequence.
-TEST(ValuesTest, ValuesWorks) {
-  const ParamGenerator<int> gen = Values(3, 5, 8);
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Values() generates the expected sequences from elements of
-// different types convertible to ParamGenerator's parameter type.
-TEST(ValuesTest, ValuesWorksForValuesOfCompatibleTypes) {
-  const ParamGenerator<double> gen = Values(3, 5.0f, 8.0);
-
-  const double expected_values[] = {3.0, 5.0, 8.0};
-  VerifyGenerator(gen, expected_values);
-}
-
-TEST(ValuesTest, ValuesWorksForMaxLengthList) {
-  const ParamGenerator<int> gen = Values(
-      10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
-      110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
-      210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
-      310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
-      410, 420, 430, 440, 450, 460, 470, 480, 490, 500);
-
-  const int expected_values[] = {
-      10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
-      110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
-      210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
-      310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
-      410, 420, 430, 440, 450, 460, 470, 480, 490, 500};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case test. Tests that single-parameter Values() generates the sequence
-// with the single value.
-TEST(ValuesTest, ValuesWithSingleParameter) {
-  const ParamGenerator<int> gen = Values(42);
-
-  const int expected_values[] = {42};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Bool() generates sequence (false, true).
-TEST(BoolTest, BoolWorks) {
-  const ParamGenerator<bool> gen = Bool();
-
-  const bool expected_values[] = {false, true};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Combine() with two parameters generates the expected sequence.
-TEST(CombineTest, CombineWithTwoParameters) {
-  const char* foo = "foo";
-  const char* bar = "bar";
-  const ParamGenerator<std::tuple<const char*, int> > gen =
-      Combine(Values(foo, bar), Values(3, 4));
-
-  std::tuple<const char*, int> expected_values[] = {
-      std::make_tuple(foo, 3), std::make_tuple(foo, 4), std::make_tuple(bar, 3),
-      std::make_tuple(bar, 4)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Combine() with three parameters generates the expected sequence.
-TEST(CombineTest, CombineWithThreeParameters) {
-  const ParamGenerator<std::tuple<int, int, int> > gen =
-      Combine(Values(0, 1), Values(3, 4), Values(5, 6));
-  std::tuple<int, int, int> expected_values[] = {
-      std::make_tuple(0, 3, 5), std::make_tuple(0, 3, 6),
-      std::make_tuple(0, 4, 5), std::make_tuple(0, 4, 6),
-      std::make_tuple(1, 3, 5), std::make_tuple(1, 3, 6),
-      std::make_tuple(1, 4, 5), std::make_tuple(1, 4, 6)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that the Combine() with the first parameter generating a single value
-// sequence generates a sequence with the number of elements equal to the
-// number of elements in the sequence generated by the second parameter.
-TEST(CombineTest, CombineWithFirstParameterSingleValue) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(42), Values(0, 1));
-
-  std::tuple<int, int> expected_values[] = {std::make_tuple(42, 0),
-                                            std::make_tuple(42, 1)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that the Combine() with the second parameter generating a single value
-// sequence generates a sequence with the number of elements equal to the
-// number of elements in the sequence generated by the first parameter.
-TEST(CombineTest, CombineWithSecondParameterSingleValue) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(0, 1), Values(42));
-
-  std::tuple<int, int> expected_values[] = {std::make_tuple(0, 42),
-                                            std::make_tuple(1, 42)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that when the first parameter produces an empty sequence,
-// Combine() produces an empty sequence, too.
-TEST(CombineTest, CombineWithFirstParameterEmptyRange) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Range(0, 0), Values(0, 1));
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that when the second parameter produces an empty sequence,
-// Combine() produces an empty sequence, too.
-TEST(CombineTest, CombineWithSecondParameterEmptyRange) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(0, 1), Range(1, 1));
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Edge case. Tests that combine works with the maximum number
-// of parameters supported by Google Test (currently 10).
-TEST(CombineTest, CombineWithMaxNumberOfParameters) {
-  const char* foo = "foo";
-  const char* bar = "bar";
-  const ParamGenerator<
-      std::tuple<const char*, int, int, int, int, int, int, int, int, int> >
-      gen =
-          Combine(Values(foo, bar), Values(1), Values(2), Values(3), Values(4),
-                  Values(5), Values(6), Values(7), Values(8), Values(9));
-
-  std::tuple<const char*, int, int, int, int, int, int, int, int, int>
-      expected_values[] = {std::make_tuple(foo, 1, 2, 3, 4, 5, 6, 7, 8, 9),
-                           std::make_tuple(bar, 1, 2, 3, 4, 5, 6, 7, 8, 9)};
-  VerifyGenerator(gen, expected_values);
-}
-
-class NonDefaultConstructAssignString {
- public:
-  NonDefaultConstructAssignString(const std::string& s) : str_(s) {}
-  NonDefaultConstructAssignString() = delete;
-  NonDefaultConstructAssignString(const NonDefaultConstructAssignString&) =
-      default;
-  NonDefaultConstructAssignString& operator=(
-      const NonDefaultConstructAssignString&) = delete;
-  ~NonDefaultConstructAssignString() = default;
-
-  const std::string& str() const { return str_; }
-
- private:
-  std::string str_;
-};
-
-TEST(CombineTest, NonDefaultConstructAssign) {
-  const ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> > gen =
-      Combine(Values(0, 1), Values(NonDefaultConstructAssignString("A"),
-                                   NonDefaultConstructAssignString("B")));
-
-  ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> >::iterator
-      it = gen.begin();
-
-  EXPECT_EQ(0, std::get<0>(*it));
-  EXPECT_EQ("A", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(0, std::get<0>(*it));
-  EXPECT_EQ("B", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(1, std::get<0>(*it));
-  EXPECT_EQ("A", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(1, std::get<0>(*it));
-  EXPECT_EQ("B", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_TRUE(it == gen.end());
-}
-
-
-// Tests that an generator produces correct sequence after being
-// assigned from another generator.
-TEST(ParamGeneratorTest, AssignmentWorks) {
-  ParamGenerator<int> gen = Values(1, 2);
-  const ParamGenerator<int> gen2 = Values(3, 4);
-  gen = gen2;
-
-  const int expected_values[] = {3, 4};
-  VerifyGenerator(gen, expected_values);
-}
-
-// This test verifies that the tests are expanded and run as specified:
-// one test per element from the sequence produced by the generator
-// specified in INSTANTIATE_TEST_SUITE_P. It also verifies that the test's
-// fixture constructor, SetUp(), and TearDown() have run and have been
-// supplied with the correct parameters.
-
-// The use of environment object allows detection of the case where no test
-// case functionality is run at all. In this case TearDownTestSuite will not
-// be able to detect missing tests, naturally.
-template <int kExpectedCalls>
-class TestGenerationEnvironment : public ::testing::Environment {
- public:
-  static TestGenerationEnvironment* Instance() {
-    static TestGenerationEnvironment* instance = new TestGenerationEnvironment;
-    return instance;
-  }
-
-  void FixtureConstructorExecuted() { fixture_constructor_count_++; }
-  void SetUpExecuted() { set_up_count_++; }
-  void TearDownExecuted() { tear_down_count_++; }
-  void TestBodyExecuted() { test_body_count_++; }
-
-  void TearDown() override {
-    // If all MultipleTestGenerationTest tests have been de-selected
-    // by the filter flag, the following checks make no sense.
-    bool perform_check = false;
-
-    for (int i = 0; i < kExpectedCalls; ++i) {
-      Message msg;
-      msg << "TestsExpandedAndRun/" << i;
-      if (UnitTestOptions::FilterMatchesTest(
-             "TestExpansionModule/MultipleTestGenerationTest",
-              msg.GetString().c_str())) {
-        perform_check = true;
-      }
-    }
-    if (perform_check) {
-      EXPECT_EQ(kExpectedCalls, fixture_constructor_count_)
-          << "Fixture constructor of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, set_up_count_)
-          << "Fixture SetUp method of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, tear_down_count_)
-          << "Fixture TearDown method of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, test_body_count_)
-          << "Test in ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-    }
-  }
-
- private:
-  TestGenerationEnvironment() : fixture_constructor_count_(0), set_up_count_(0),
-                                tear_down_count_(0), test_body_count_(0) {}
-
-  int fixture_constructor_count_;
-  int set_up_count_;
-  int tear_down_count_;
-  int test_body_count_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationEnvironment);
-};
-
-const int test_generation_params[] = {36, 42, 72};
-
-class TestGenerationTest : public TestWithParam<int> {
- public:
-  enum {
-    PARAMETER_COUNT =
-        sizeof(test_generation_params)/sizeof(test_generation_params[0])
-  };
-
-  typedef TestGenerationEnvironment<PARAMETER_COUNT> Environment;
-
-  TestGenerationTest() {
-    Environment::Instance()->FixtureConstructorExecuted();
-    current_parameter_ = GetParam();
-  }
-  void SetUp() override {
-    Environment::Instance()->SetUpExecuted();
-    EXPECT_EQ(current_parameter_, GetParam());
-  }
-  void TearDown() override {
-    Environment::Instance()->TearDownExecuted();
-    EXPECT_EQ(current_parameter_, GetParam());
-  }
-
-  static void SetUpTestSuite() {
-    bool all_tests_in_test_case_selected = true;
-
-    for (int i = 0; i < PARAMETER_COUNT; ++i) {
-      Message test_name;
-      test_name << "TestsExpandedAndRun/" << i;
-      if ( !UnitTestOptions::FilterMatchesTest(
-                "TestExpansionModule/MultipleTestGenerationTest",
-                test_name.GetString())) {
-        all_tests_in_test_case_selected = false;
-      }
-    }
-    EXPECT_TRUE(all_tests_in_test_case_selected)
-        << "When running the TestGenerationTest test case all of its tests\n"
-        << "must be selected by the filter flag for the test case to pass.\n"
-        << "If not all of them are enabled, we can't reliably conclude\n"
-        << "that the correct number of tests have been generated.";
-
-    collected_parameters_.clear();
-  }
-
-  static void TearDownTestSuite() {
-    vector<int> expected_values(test_generation_params,
-                                test_generation_params + PARAMETER_COUNT);
-    // Test execution order is not guaranteed by Google Test,
-    // so the order of values in collected_parameters_ can be
-    // different and we have to sort to compare.
-    sort(expected_values.begin(), expected_values.end());
-    sort(collected_parameters_.begin(), collected_parameters_.end());
-
-    EXPECT_TRUE(collected_parameters_ == expected_values);
-  }
-
- protected:
-  int current_parameter_;
-  static vector<int> collected_parameters_;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationTest);
-};
-vector<int> TestGenerationTest::collected_parameters_;
-
-TEST_P(TestGenerationTest, TestsExpandedAndRun) {
-  Environment::Instance()->TestBodyExecuted();
-  EXPECT_EQ(current_parameter_, GetParam());
-  collected_parameters_.push_back(GetParam());
-}
-INSTANTIATE_TEST_SUITE_P(TestExpansionModule, TestGenerationTest,
-                         ValuesIn(test_generation_params));
-
-// This test verifies that the element sequence (third parameter of
-// INSTANTIATE_TEST_SUITE_P) is evaluated in InitGoogleTest() and neither at
-// the call site of INSTANTIATE_TEST_SUITE_P nor in RUN_ALL_TESTS().  For
-// that, we declare param_value_ to be a static member of
-// GeneratorEvaluationTest and initialize it to 0.  We set it to 1 in
-// main(), just before invocation of InitGoogleTest().  After calling
-// InitGoogleTest(), we set the value to 2.  If the sequence is evaluated
-// before or after InitGoogleTest, INSTANTIATE_TEST_SUITE_P will create a
-// test with parameter other than 1, and the test body will fail the
-// assertion.
-class GeneratorEvaluationTest : public TestWithParam<int> {
- public:
-  static int param_value() { return param_value_; }
-  static void set_param_value(int param_value) { param_value_ = param_value; }
-
- private:
-  static int param_value_;
-};
-int GeneratorEvaluationTest::param_value_ = 0;
-
-TEST_P(GeneratorEvaluationTest, GeneratorsEvaluatedInMain) {
-  EXPECT_EQ(1, GetParam());
-}
-INSTANTIATE_TEST_SUITE_P(GenEvalModule, GeneratorEvaluationTest,
-                         Values(GeneratorEvaluationTest::param_value()));
-
-// Tests that generators defined in a different translation unit are
-// functional. Generator extern_gen is defined in gtest-param-test_test2.cc.
-extern ParamGenerator<int> extern_gen;
-class ExternalGeneratorTest : public TestWithParam<int> {};
-TEST_P(ExternalGeneratorTest, ExternalGenerator) {
-  // Sequence produced by extern_gen contains only a single value
-  // which we verify here.
-  EXPECT_EQ(GetParam(), 33);
-}
-INSTANTIATE_TEST_SUITE_P(ExternalGeneratorModule, ExternalGeneratorTest,
-                         extern_gen);
-
-// Tests that a parameterized test case can be defined in one translation
-// unit and instantiated in another. This test will be instantiated in
-// gtest-param-test_test2.cc. ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-TEST_P(ExternalInstantiationTest, IsMultipleOf33) {
-  EXPECT_EQ(0, GetParam() % 33);
-}
-
-// Tests that a parameterized test case can be instantiated with multiple
-// generators.
-class MultipleInstantiationTest : public TestWithParam<int> {};
-TEST_P(MultipleInstantiationTest, AllowsMultipleInstances) {
-}
-INSTANTIATE_TEST_SUITE_P(Sequence1, MultipleInstantiationTest, Values(1, 2));
-INSTANTIATE_TEST_SUITE_P(Sequence2, MultipleInstantiationTest, Range(3, 5));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. This test will be instantiated
-// here and in gtest-param-test_test2.cc.
-// InstantiationInMultipleTranslationUnitsTest fixture class
-// is defined in gtest-param-test_test.h.
-TEST_P(InstantiationInMultipleTranslationUnitsTest, IsMultipleOf42) {
-  EXPECT_EQ(0, GetParam() % 42);
-}
-INSTANTIATE_TEST_SUITE_P(Sequence1, InstantiationInMultipleTranslationUnitsTest,
-                         Values(42, 42 * 2));
-
-// Tests that each iteration of parameterized test runs in a separate test
-// object.
-class SeparateInstanceTest : public TestWithParam<int> {
- public:
-  SeparateInstanceTest() : count_(0) {}
-
-  static void TearDownTestSuite() {
-    EXPECT_GE(global_count_, 2)
-        << "If some (but not all) SeparateInstanceTest tests have been "
-        << "filtered out this test will fail. Make sure that all "
-        << "GeneratorEvaluationTest are selected or de-selected together "
-        << "by the test filter.";
-  }
-
- protected:
-  int count_;
-  static int global_count_;
-};
-int SeparateInstanceTest::global_count_ = 0;
-
-TEST_P(SeparateInstanceTest, TestsRunInSeparateInstances) {
-  EXPECT_EQ(0, count_++);
-  global_count_++;
-}
-INSTANTIATE_TEST_SUITE_P(FourElemSequence, SeparateInstanceTest, Range(1, 4));
-
-// Tests that all instantiations of a test have named appropriately. Test
-// defined with TEST_P(TestSuiteName, TestName) and instantiated with
-// INSTANTIATE_TEST_SUITE_P(SequenceName, TestSuiteName, generator) must be
-// named SequenceName/TestSuiteName.TestName/i, where i is the 0-based index of
-// the sequence element used to instantiate the test.
-class NamingTest : public TestWithParam<int> {};
-
-TEST_P(NamingTest, TestsReportCorrectNamesAndParameters) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("ZeroToFiveSequence/NamingTest", test_info->test_suite_name());
-
-  Message index_stream;
-  index_stream << "TestsReportCorrectNamesAndParameters/" << GetParam();
-  EXPECT_STREQ(index_stream.GetString().c_str(), test_info->name());
-
-  EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
-}
-
-INSTANTIATE_TEST_SUITE_P(ZeroToFiveSequence, NamingTest, Range(0, 5));
-
-// Tests that macros in test names are expanded correctly.
-class MacroNamingTest : public TestWithParam<int> {};
-
-#define PREFIX_WITH_FOO(test_name) Foo##test_name
-#define PREFIX_WITH_MACRO(test_name) Macro##test_name
-
-TEST_P(PREFIX_WITH_MACRO(NamingTest), PREFIX_WITH_FOO(SomeTestName)) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("FortyTwo/MacroNamingTest", test_info->test_suite_name());
-  EXPECT_STREQ("FooSomeTestName/0", test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(FortyTwo, MacroNamingTest, Values(42));
-
-// Tests the same thing for non-parametrized tests.
-class MacroNamingTestNonParametrized : public ::testing::Test {};
-
-TEST_F(PREFIX_WITH_MACRO(NamingTestNonParametrized),
-       PREFIX_WITH_FOO(SomeTestName)) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("MacroNamingTestNonParametrized", test_info->test_suite_name());
-  EXPECT_STREQ("FooSomeTestName", test_info->name());
-}
-
-TEST(MacroNameing, LookupNames) {
-  std::set<std::string> know_suite_names, know_test_names;
-
-  auto ins = testing::UnitTest::GetInstance();
-  int ts = 0;
-  while (const testing::TestSuite* suite = ins->GetTestSuite(ts++)) {
-    know_suite_names.insert(suite->name());
-
-    int ti = 0;
-    while (const testing::TestInfo* info = suite->GetTestInfo(ti++)) {
-      know_test_names.insert(std::string(suite->name()) + "." + info->name());
-    }
-  }
-
-  // Check that the expected form of the test suit name actually exists.
-  EXPECT_NE(  //
-      know_suite_names.find("FortyTwo/MacroNamingTest"),
-      know_suite_names.end());
-  EXPECT_NE(
-      know_suite_names.find("MacroNamingTestNonParametrized"),
-      know_suite_names.end());
-  // Check that the expected form of the test name actually exists.
-  EXPECT_NE(  //
-      know_test_names.find("FortyTwo/MacroNamingTest.FooSomeTestName/0"),
-      know_test_names.end());
-  EXPECT_NE(
-      know_test_names.find("MacroNamingTestNonParametrized.FooSomeTestName"),
-      know_test_names.end());
-}
-
-// Tests that user supplied custom parameter names are working correctly.
-// Runs the test with a builtin helper method which uses PrintToString,
-// as well as a custom function and custom functor to ensure all possible
-// uses work correctly.
-class CustomFunctorNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomFunctorNamingTest, CustomTestNames) {}
-
-struct CustomParamNameFunctor {
-  std::string operator()(const ::testing::TestParamInfo<std::string>& inf) {
-    return inf.param;
-  }
-};
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctor, CustomFunctorNamingTest,
-                         Values(std::string("FunctorName")),
-                         CustomParamNameFunctor());
-
-INSTANTIATE_TEST_SUITE_P(AllAllowedCharacters, CustomFunctorNamingTest,
-                         Values("abcdefghijklmnopqrstuvwxyz",
-                                "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "01234567890_"),
-                         CustomParamNameFunctor());
-
-inline std::string CustomParamNameFunction(
-    const ::testing::TestParamInfo<std::string>& inf) {
-  return inf.param;
-}
-
-class CustomFunctionNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomFunctionNamingTest, CustomTestNames) {}
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunction, CustomFunctionNamingTest,
-                         Values(std::string("FunctionName")),
-                         CustomParamNameFunction);
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctionP, CustomFunctionNamingTest,
-                         Values(std::string("FunctionNameP")),
-                         &CustomParamNameFunction);
-
-// Test custom naming with a lambda
-
-class CustomLambdaNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomLambdaNamingTest, CustomTestNames) {}
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameLambda, CustomLambdaNamingTest,
-                         Values(std::string("LambdaName")),
-                         [](const ::testing::TestParamInfo<std::string>& inf) {
-                           return inf.param;
-                         });
-
-TEST(CustomNamingTest, CheckNameRegistry) {
-  ::testing::UnitTest* unit_test = ::testing::UnitTest::GetInstance();
-  std::set<std::string> test_names;
-  for (int suite_num = 0; suite_num < unit_test->total_test_suite_count();
-       ++suite_num) {
-    const ::testing::TestSuite* test_suite = unit_test->GetTestSuite(suite_num);
-    for (int test_num = 0; test_num < test_suite->total_test_count();
-         ++test_num) {
-      const ::testing::TestInfo* test_info = test_suite->GetTestInfo(test_num);
-      test_names.insert(std::string(test_info->name()));
-    }
-  }
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctorName"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionName"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionNameP"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/LambdaName"));
-}
-
-// Test a numeric name to ensure PrintToStringParamName works correctly.
-
-class CustomIntegerNamingTest : public TestWithParam<int> {};
-
-TEST_P(CustomIntegerNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << GetParam();
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintToString, CustomIntegerNamingTest, Range(0, 5),
-                         ::testing::PrintToStringParamName());
-
-// Test a custom struct with PrintToString.
-
-struct CustomStruct {
-  explicit CustomStruct(int value) : x(value) {}
-  int x;
-};
-
-std::ostream& operator<<(std::ostream& stream, const CustomStruct& val) {
-  stream << val.x;
-  return stream;
-}
-
-class CustomStructNamingTest : public TestWithParam<CustomStruct> {};
-
-TEST_P(CustomStructNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << GetParam();
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintToString, CustomStructNamingTest,
-                         Values(CustomStruct(0), CustomStruct(1)),
-                         ::testing::PrintToStringParamName());
-
-// Test that using a stateful parameter naming function works as expected.
-
-struct StatefulNamingFunctor {
-  StatefulNamingFunctor() : sum(0) {}
-  std::string operator()(const ::testing::TestParamInfo<int>& info) {
-    int value = info.param + sum;
-    sum += info.param;
-    return ::testing::PrintToString(value);
-  }
-  int sum;
-};
-
-class StatefulNamingTest : public ::testing::TestWithParam<int> {
- protected:
-  StatefulNamingTest() : sum_(0) {}
-  int sum_;
-};
-
-TEST_P(StatefulNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  sum_ += GetParam();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << sum_;
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(StatefulNamingFunctor, StatefulNamingTest, Range(0, 5),
-                         StatefulNamingFunctor());
-
-// Class that cannot be streamed into an ostream.  It needs to be copyable
-// (and, in case of MSVC, also assignable) in order to be a test parameter
-// type.  Its default copy constructor and assignment operator do exactly
-// what we need.
-class Unstreamable {
- public:
-  explicit Unstreamable(int value) : value_(value) {}
-  // -Wunused-private-field: dummy accessor for `value_`.
-  const int& dummy_value() const { return value_; }
-
- private:
-  int value_;
-};
-
-class CommentTest : public TestWithParam<Unstreamable> {};
-
-TEST_P(CommentTest, TestsCorrectlyReportUnstreamableParams) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
-}
-
-INSTANTIATE_TEST_SUITE_P(InstantiationWithComments, CommentTest,
-                         Values(Unstreamable(1)));
-
-// Verify that we can create a hierarchy of test fixtures, where the base
-// class fixture is not parameterized and the derived class is. In this case
-// ParameterizedDerivedTest inherits from NonParameterizedBaseTest.  We
-// perform simple tests on both.
-class NonParameterizedBaseTest : public ::testing::Test {
- public:
-  NonParameterizedBaseTest() : n_(17) { }
- protected:
-  int n_;
-};
-
-class ParameterizedDerivedTest : public NonParameterizedBaseTest,
-                                 public ::testing::WithParamInterface<int> {
- protected:
-  ParameterizedDerivedTest() : count_(0) { }
-  int count_;
-  static int global_count_;
-};
-
-int ParameterizedDerivedTest::global_count_ = 0;
-
-TEST_F(NonParameterizedBaseTest, FixtureIsInitialized) {
-  EXPECT_EQ(17, n_);
-}
-
-TEST_P(ParameterizedDerivedTest, SeesSequence) {
-  EXPECT_EQ(17, n_);
-  EXPECT_EQ(0, count_++);
-  EXPECT_EQ(GetParam(), global_count_++);
-}
-
-class ParameterizedDeathTest : public ::testing::TestWithParam<int> { };
-
-TEST_F(ParameterizedDeathTest, GetParamDiesFromTestF) {
-  EXPECT_DEATH_IF_SUPPORTED(GetParam(),
-                            ".* value-parameterized test .*");
-}
-
-INSTANTIATE_TEST_SUITE_P(RangeZeroToFive, ParameterizedDerivedTest,
-                         Range(0, 5));
-
-// Tests param generator working with Enums
-enum MyEnums {
-  ENUM1 = 1,
-  ENUM2 = 3,
-  ENUM3 = 8,
-};
-
-class MyEnumTest : public testing::TestWithParam<MyEnums> {};
-
-TEST_P(MyEnumTest, ChecksParamMoreThanZero) { EXPECT_GE(10, GetParam()); }
-INSTANTIATE_TEST_SUITE_P(MyEnumTests, MyEnumTest,
-                         ::testing::Values(ENUM1, ENUM2, 0));
-
-namespace works_here {
-// Never used not instantiated, this should work.
-class NotUsedTest : public testing::TestWithParam<int> {};
-
-///////
-// Never used not instantiated, this should work.
-template <typename T>
-class NotUsedTypeTest : public testing::Test {};
-TYPED_TEST_SUITE_P(NotUsedTypeTest);
-
-// Used but not instantiated, this would fail. but...
-class NotInstantiatedTest : public testing::TestWithParam<int> {};
-// ... we mark is as allowed.
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(NotInstantiatedTest);
-
-TEST_P(NotInstantiatedTest, Used) { }
-
-using OtherName = NotInstantiatedTest;
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(OtherName);
-TEST_P(OtherName, Used) { }
-
-// Used but not instantiated, this would fail. but...
-template <typename T>
-class NotInstantiatedTypeTest : public testing::Test {};
-TYPED_TEST_SUITE_P(NotInstantiatedTypeTest);
-// ... we mark is as allowed.
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(NotInstantiatedTypeTest);
-
-TYPED_TEST_P(NotInstantiatedTypeTest, Used) { }
-REGISTER_TYPED_TEST_SUITE_P(NotInstantiatedTypeTest, Used);
-}  // namespace works_here
-
-int main(int argc, char **argv) {
-  // Used in TestGenerationTest test suite.
-  AddGlobalTestEnvironment(TestGenerationTest::Environment::Instance());
-  // Used in GeneratorEvaluationTest test suite. Tests that the updated value
-  // will be picked up for instantiating tests in GeneratorEvaluationTest.
-  GeneratorEvaluationTest::set_param_value(1);
-
-  ::testing::InitGoogleTest(&argc, argv);
-
-  // Used in GeneratorEvaluationTest test suite. Tests that value updated
-  // here will NOT be used for instantiating tests in
-  // GeneratorEvaluationTest.
-  GeneratorEvaluationTest::set_param_value(2);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-param-test-test.h b/third_party/googletest/googletest/test/googletest-param-test-test.h
deleted file mode 100644
index 8919375..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test-test.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file provides classes and functions used internally
-// for testing Google Test itself.
-
-#ifndef GOOGLETEST_TEST_GOOGLETEST_PARAM_TEST_TEST_H_
-#define GOOGLETEST_TEST_GOOGLETEST_PARAM_TEST_TEST_H_
-
-#include "gtest/gtest.h"
-
-// Test fixture for testing definition and instantiation of a test
-// in separate translation units.
-class ExternalInstantiationTest : public ::testing::TestWithParam<int> {
-};
-
-// Test fixture for testing instantiation of a test in multiple
-// translation units.
-class InstantiationInMultipleTranslationUnitsTest
-    : public ::testing::TestWithParam<int> {
-};
-
-#endif  // GOOGLETEST_TEST_GOOGLETEST_PARAM_TEST_TEST_H_
diff --git a/third_party/googletest/googletest/test/googletest-param-test2-test.cc b/third_party/googletest/googletest/test/googletest-param-test2-test.cc
deleted file mode 100644
index 2a29fb1..0000000
--- a/third_party/googletest/googletest/test/googletest-param-test2-test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-#include "test/googletest-param-test-test.h"
-
-using ::testing::Values;
-using ::testing::internal::ParamGenerator;
-
-// Tests that generators defined in a different translation unit
-// are functional. The test using extern_gen is defined
-// in googletest-param-test-test.cc.
-ParamGenerator<int> extern_gen = Values(33);
-
-// Tests that a parameterized test case can be defined in one translation unit
-// and instantiated in another. The test is defined in
-// googletest-param-test-test.cc and ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-INSTANTIATE_TEST_SUITE_P(MultiplesOf33,
-                         ExternalInstantiationTest,
-                         Values(33, 66));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. Another instantiation is defined
-// in googletest-param-test-test.cc and
-// InstantiationInMultipleTranslationUnitsTest fixture is defined in
-// gtest-param-test_test.h
-INSTANTIATE_TEST_SUITE_P(Sequence2,
-                         InstantiationInMultipleTranslationUnitsTest,
-                         Values(42*3, 42*4, 42*5));
-
diff --git a/third_party/googletest/googletest/test/googletest-port-test.cc b/third_party/googletest/googletest/test/googletest-port-test.cc
deleted file mode 100644
index 1e0c861..0000000
--- a/third_party/googletest/googletest/test/googletest-port-test.cc
+++ /dev/null
@@ -1,1276 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file tests the internal cross-platform support utilities.
-#include <stdio.h>
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_MAC
-# include <time.h>
-#endif  // GTEST_OS_MAC
-
-#include <list>
-#include <memory>
-#include <utility>  // For std::pair and std::make_pair.
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-#include "src/gtest-internal-inl.h"
-
-using std::make_pair;
-using std::pair;
-
-namespace testing {
-namespace internal {
-
-TEST(IsXDigitTest, WorksForNarrowAscii) {
-  EXPECT_TRUE(IsXDigit('0'));
-  EXPECT_TRUE(IsXDigit('9'));
-  EXPECT_TRUE(IsXDigit('A'));
-  EXPECT_TRUE(IsXDigit('F'));
-  EXPECT_TRUE(IsXDigit('a'));
-  EXPECT_TRUE(IsXDigit('f'));
-
-  EXPECT_FALSE(IsXDigit('-'));
-  EXPECT_FALSE(IsXDigit('g'));
-  EXPECT_FALSE(IsXDigit('G'));
-}
-
-TEST(IsXDigitTest, ReturnsFalseForNarrowNonAscii) {
-  EXPECT_FALSE(IsXDigit(static_cast<char>('\x80')));
-  EXPECT_FALSE(IsXDigit(static_cast<char>('0' | '\x80')));
-}
-
-TEST(IsXDigitTest, WorksForWideAscii) {
-  EXPECT_TRUE(IsXDigit(L'0'));
-  EXPECT_TRUE(IsXDigit(L'9'));
-  EXPECT_TRUE(IsXDigit(L'A'));
-  EXPECT_TRUE(IsXDigit(L'F'));
-  EXPECT_TRUE(IsXDigit(L'a'));
-  EXPECT_TRUE(IsXDigit(L'f'));
-
-  EXPECT_FALSE(IsXDigit(L'-'));
-  EXPECT_FALSE(IsXDigit(L'g'));
-  EXPECT_FALSE(IsXDigit(L'G'));
-}
-
-TEST(IsXDigitTest, ReturnsFalseForWideNonAscii) {
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(0x80)));
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x80)));
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x100)));
-}
-
-class Base {
- public:
-  Base() : member_(0) {}
-  explicit Base(int n) : member_(n) {}
-  Base(const Base&) = default;
-  Base& operator=(const Base&) = default;
-  virtual ~Base() {}
-  int member() { return member_; }
-
- private:
-  int member_;
-};
-
-class Derived : public Base {
- public:
-  explicit Derived(int n) : Base(n) {}
-};
-
-TEST(ImplicitCastTest, ConvertsPointers) {
-  Derived derived(0);
-  EXPECT_TRUE(&derived == ::testing::internal::ImplicitCast_<Base*>(&derived));
-}
-
-TEST(ImplicitCastTest, CanUseInheritance) {
-  Derived derived(1);
-  Base base = ::testing::internal::ImplicitCast_<Base>(derived);
-  EXPECT_EQ(derived.member(), base.member());
-}
-
-class Castable {
- public:
-  explicit Castable(bool* converted) : converted_(converted) {}
-  operator Base() {
-    *converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-};
-
-TEST(ImplicitCastTest, CanUseNonConstCastOperator) {
-  bool converted = false;
-  Castable castable(&converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(castable);
-  EXPECT_TRUE(converted);
-}
-
-class ConstCastable {
- public:
-  explicit ConstCastable(bool* converted) : converted_(converted) {}
-  operator Base() const {
-    *converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-};
-
-TEST(ImplicitCastTest, CanUseConstCastOperatorOnConstValues) {
-  bool converted = false;
-  const ConstCastable const_castable(&converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(const_castable);
-  EXPECT_TRUE(converted);
-}
-
-class ConstAndNonConstCastable {
- public:
-  ConstAndNonConstCastable(bool* converted, bool* const_converted)
-      : converted_(converted), const_converted_(const_converted) {}
-  operator Base() {
-    *converted_ = true;
-    return Base();
-  }
-  operator Base() const {
-    *const_converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-  bool* const_converted_;
-};
-
-TEST(ImplicitCastTest, CanSelectBetweenConstAndNonConstCasrAppropriately) {
-  bool converted = false;
-  bool const_converted = false;
-  ConstAndNonConstCastable castable(&converted, &const_converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(castable);
-  EXPECT_TRUE(converted);
-  EXPECT_FALSE(const_converted);
-
-  converted = false;
-  const_converted = false;
-  const ConstAndNonConstCastable const_castable(&converted, &const_converted);
-  base = ::testing::internal::ImplicitCast_<Base>(const_castable);
-  EXPECT_FALSE(converted);
-  EXPECT_TRUE(const_converted);
-}
-
-class To {
- public:
-  To(bool* converted) { *converted = true; }  // NOLINT
-};
-
-TEST(ImplicitCastTest, CanUseImplicitConstructor) {
-  bool converted = false;
-  To to = ::testing::internal::ImplicitCast_<To>(&converted);
-  (void)to;
-  EXPECT_TRUE(converted);
-}
-
-// The following code intentionally tests a suboptimal syntax.
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdangling-else"
-#pragma GCC diagnostic ignored "-Wempty-body"
-#pragma GCC diagnostic ignored "-Wpragmas"
-#endif
-TEST(GtestCheckSyntaxTest, BehavesLikeASingleStatement) {
-  if (AlwaysFalse())
-    GTEST_CHECK_(false) << "This should never be executed; "
-                           "It's a compilation test only.";
-
-  if (AlwaysTrue())
-    GTEST_CHECK_(true);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    GTEST_CHECK_(true) << "";
-}
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-TEST(GtestCheckSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      GTEST_CHECK_(true);
-  }
-
-  switch (0)
-    case 0:
-      GTEST_CHECK_(true) << "Check failed in switch case";
-}
-
-// Verifies behavior of FormatFileLocation.
-TEST(FormatFileLocationTest, FormatsFileLocation) {
-  EXPECT_PRED_FORMAT2(IsSubstring, "foo.cc", FormatFileLocation("foo.cc", 42));
-  EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation("foo.cc", 42));
-}
-
-TEST(FormatFileLocationTest, FormatsUnknownFile) {
-  EXPECT_PRED_FORMAT2(IsSubstring, "unknown file",
-                      FormatFileLocation(nullptr, 42));
-  EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation(nullptr, 42));
-}
-
-TEST(FormatFileLocationTest, FormatsUknownLine) {
-  EXPECT_EQ("foo.cc:", FormatFileLocation("foo.cc", -1));
-}
-
-TEST(FormatFileLocationTest, FormatsUknownFileAndLine) {
-  EXPECT_EQ("unknown file:", FormatFileLocation(nullptr, -1));
-}
-
-// Verifies behavior of FormatCompilerIndependentFileLocation.
-TEST(FormatCompilerIndependentFileLocationTest, FormatsFileLocation) {
-  EXPECT_EQ("foo.cc:42", FormatCompilerIndependentFileLocation("foo.cc", 42));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFile) {
-  EXPECT_EQ("unknown file:42",
-            FormatCompilerIndependentFileLocation(nullptr, 42));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownLine) {
-  EXPECT_EQ("foo.cc", FormatCompilerIndependentFileLocation("foo.cc", -1));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFileAndLine) {
-  EXPECT_EQ("unknown file", FormatCompilerIndependentFileLocation(nullptr, -1));
-}
-
-#if GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA || \
-    GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-void* ThreadFunc(void* data) {
-  internal::Mutex* mutex = static_cast<internal::Mutex*>(data);
-  mutex->Lock();
-  mutex->Unlock();
-  return nullptr;
-}
-
-TEST(GetThreadCountTest, ReturnsCorrectValue) {
-  const size_t starting_count = GetThreadCount();
-  pthread_t       thread_id;
-
-  internal::Mutex mutex;
-  {
-    internal::MutexLock lock(&mutex);
-    pthread_attr_t  attr;
-    ASSERT_EQ(0, pthread_attr_init(&attr));
-    ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE));
-
-    const int status = pthread_create(&thread_id, &attr, &ThreadFunc, &mutex);
-    ASSERT_EQ(0, pthread_attr_destroy(&attr));
-    ASSERT_EQ(0, status);
-    EXPECT_EQ(starting_count + 1, GetThreadCount());
-  }
-
-  void* dummy;
-  ASSERT_EQ(0, pthread_join(thread_id, &dummy));
-
-  // The OS may not immediately report the updated thread count after
-  // joining a thread, causing flakiness in this test. To counter that, we
-  // wait for up to .5 seconds for the OS to report the correct value.
-  for (int i = 0; i < 5; ++i) {
-    if (GetThreadCount() == starting_count)
-      break;
-
-    SleepMilliseconds(100);
-  }
-
-  EXPECT_EQ(starting_count, GetThreadCount());
-}
-#else
-TEST(GetThreadCountTest, ReturnsZeroWhenUnableToCountThreads) {
-  EXPECT_EQ(0U, GetThreadCount());
-}
-#endif  // GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA
-
-TEST(GtestCheckDeathTest, DiesWithCorrectOutputOnFailure) {
-  const bool a_false_condition = false;
-  const char regex[] =
-#ifdef _MSC_VER
-     "googletest-port-test\\.cc\\(\\d+\\):"
-#elif GTEST_USES_POSIX_RE
-     "googletest-port-test\\.cc:[0-9]+"
-#else
-     "googletest-port-test\\.cc:\\d+"
-#endif  // _MSC_VER
-     ".*a_false_condition.*Extra info.*";
-
-  EXPECT_DEATH_IF_SUPPORTED(GTEST_CHECK_(a_false_condition) << "Extra info",
-                            regex);
-}
-
-#if GTEST_HAS_DEATH_TEST
-
-TEST(GtestCheckDeathTest, LivesSilentlyOnSuccess) {
-  EXPECT_EXIT({
-      GTEST_CHECK_(true) << "Extra info";
-      ::std::cerr << "Success\n";
-      exit(0); },
-      ::testing::ExitedWithCode(0), "Success");
-}
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Verifies that Google Test choose regular expression engine appropriate to
-// the platform. The test will produce compiler errors in case of failure.
-// For simplicity, we only cover the most important platforms here.
-TEST(RegexEngineSelectionTest, SelectsCorrectRegexEngine) {
-#if !GTEST_USES_PCRE
-# if GTEST_HAS_POSIX_RE
-
-  EXPECT_TRUE(GTEST_USES_POSIX_RE);
-
-# else
-
-  EXPECT_TRUE(GTEST_USES_SIMPLE_RE);
-
-# endif
-#endif  // !GTEST_USES_PCRE
-}
-
-#if GTEST_USES_POSIX_RE
-
-template <typename Str>
-class RETest : public ::testing::Test {};
-
-// Defines StringTypes as the list of all string types that class RE
-// supports.
-typedef testing::Types< ::std::string, const char*> StringTypes;
-
-TYPED_TEST_SUITE(RETest, StringTypes);
-
-// Tests RE's implicit constructors.
-TYPED_TEST(RETest, ImplicitConstructorWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_STREQ("", empty.pattern());
-
-  const RE simple(TypeParam("hello"));
-  EXPECT_STREQ("hello", simple.pattern());
-
-  const RE normal(TypeParam(".*(\\w+)"));
-  EXPECT_STREQ(".*(\\w+)", normal.pattern());
-}
-
-// Tests that RE's constructors reject invalid regular expressions.
-TYPED_TEST(RETest, RejectsInvalidRegex) {
-  EXPECT_NONFATAL_FAILURE({
-    const RE invalid(TypeParam("?"));
-  }, "\"?\" is not a valid POSIX Extended regular expression.");
-}
-
-// Tests RE::FullMatch().
-TYPED_TEST(RETest, FullMatchWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_TRUE(RE::FullMatch(TypeParam(""), empty));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("a"), empty));
-
-  const RE re(TypeParam("a.*z"));
-  EXPECT_TRUE(RE::FullMatch(TypeParam("az"), re));
-  EXPECT_TRUE(RE::FullMatch(TypeParam("axyz"), re));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("baz"), re));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("azy"), re));
-}
-
-// Tests RE::PartialMatch().
-TYPED_TEST(RETest, PartialMatchWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam(""), empty));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("a"), empty));
-
-  const RE re(TypeParam("a.*z"));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("az"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("axyz"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("baz"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("azy"), re));
-  EXPECT_FALSE(RE::PartialMatch(TypeParam("zza"), re));
-}
-
-#elif GTEST_USES_SIMPLE_RE
-
-TEST(IsInSetTest, NulCharIsNotInAnySet) {
-  EXPECT_FALSE(IsInSet('\0', ""));
-  EXPECT_FALSE(IsInSet('\0', "\0"));
-  EXPECT_FALSE(IsInSet('\0', "a"));
-}
-
-TEST(IsInSetTest, WorksForNonNulChars) {
-  EXPECT_FALSE(IsInSet('a', "Ab"));
-  EXPECT_FALSE(IsInSet('c', ""));
-
-  EXPECT_TRUE(IsInSet('b', "bcd"));
-  EXPECT_TRUE(IsInSet('b', "ab"));
-}
-
-TEST(IsAsciiDigitTest, IsFalseForNonDigit) {
-  EXPECT_FALSE(IsAsciiDigit('\0'));
-  EXPECT_FALSE(IsAsciiDigit(' '));
-  EXPECT_FALSE(IsAsciiDigit('+'));
-  EXPECT_FALSE(IsAsciiDigit('-'));
-  EXPECT_FALSE(IsAsciiDigit('.'));
-  EXPECT_FALSE(IsAsciiDigit('a'));
-}
-
-TEST(IsAsciiDigitTest, IsTrueForDigit) {
-  EXPECT_TRUE(IsAsciiDigit('0'));
-  EXPECT_TRUE(IsAsciiDigit('1'));
-  EXPECT_TRUE(IsAsciiDigit('5'));
-  EXPECT_TRUE(IsAsciiDigit('9'));
-}
-
-TEST(IsAsciiPunctTest, IsFalseForNonPunct) {
-  EXPECT_FALSE(IsAsciiPunct('\0'));
-  EXPECT_FALSE(IsAsciiPunct(' '));
-  EXPECT_FALSE(IsAsciiPunct('\n'));
-  EXPECT_FALSE(IsAsciiPunct('a'));
-  EXPECT_FALSE(IsAsciiPunct('0'));
-}
-
-TEST(IsAsciiPunctTest, IsTrueForPunct) {
-  for (const char* p = "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~"; *p; p++) {
-    EXPECT_PRED1(IsAsciiPunct, *p);
-  }
-}
-
-TEST(IsRepeatTest, IsFalseForNonRepeatChar) {
-  EXPECT_FALSE(IsRepeat('\0'));
-  EXPECT_FALSE(IsRepeat(' '));
-  EXPECT_FALSE(IsRepeat('a'));
-  EXPECT_FALSE(IsRepeat('1'));
-  EXPECT_FALSE(IsRepeat('-'));
-}
-
-TEST(IsRepeatTest, IsTrueForRepeatChar) {
-  EXPECT_TRUE(IsRepeat('?'));
-  EXPECT_TRUE(IsRepeat('*'));
-  EXPECT_TRUE(IsRepeat('+'));
-}
-
-TEST(IsAsciiWhiteSpaceTest, IsFalseForNonWhiteSpace) {
-  EXPECT_FALSE(IsAsciiWhiteSpace('\0'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('a'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('1'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('+'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('_'));
-}
-
-TEST(IsAsciiWhiteSpaceTest, IsTrueForWhiteSpace) {
-  EXPECT_TRUE(IsAsciiWhiteSpace(' '));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\n'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\r'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\t'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\v'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\f'));
-}
-
-TEST(IsAsciiWordCharTest, IsFalseForNonWordChar) {
-  EXPECT_FALSE(IsAsciiWordChar('\0'));
-  EXPECT_FALSE(IsAsciiWordChar('+'));
-  EXPECT_FALSE(IsAsciiWordChar('.'));
-  EXPECT_FALSE(IsAsciiWordChar(' '));
-  EXPECT_FALSE(IsAsciiWordChar('\n'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForLetter) {
-  EXPECT_TRUE(IsAsciiWordChar('a'));
-  EXPECT_TRUE(IsAsciiWordChar('b'));
-  EXPECT_TRUE(IsAsciiWordChar('A'));
-  EXPECT_TRUE(IsAsciiWordChar('Z'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForDigit) {
-  EXPECT_TRUE(IsAsciiWordChar('0'));
-  EXPECT_TRUE(IsAsciiWordChar('1'));
-  EXPECT_TRUE(IsAsciiWordChar('7'));
-  EXPECT_TRUE(IsAsciiWordChar('9'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForUnderscore) {
-  EXPECT_TRUE(IsAsciiWordChar('_'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForNonPrintable) {
-  EXPECT_FALSE(IsValidEscape('\0'));
-  EXPECT_FALSE(IsValidEscape('\007'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForDigit) {
-  EXPECT_FALSE(IsValidEscape('0'));
-  EXPECT_FALSE(IsValidEscape('9'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForWhiteSpace) {
-  EXPECT_FALSE(IsValidEscape(' '));
-  EXPECT_FALSE(IsValidEscape('\n'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForSomeLetter) {
-  EXPECT_FALSE(IsValidEscape('a'));
-  EXPECT_FALSE(IsValidEscape('Z'));
-}
-
-TEST(IsValidEscapeTest, IsTrueForPunct) {
-  EXPECT_TRUE(IsValidEscape('.'));
-  EXPECT_TRUE(IsValidEscape('-'));
-  EXPECT_TRUE(IsValidEscape('^'));
-  EXPECT_TRUE(IsValidEscape('$'));
-  EXPECT_TRUE(IsValidEscape('('));
-  EXPECT_TRUE(IsValidEscape(']'));
-  EXPECT_TRUE(IsValidEscape('{'));
-  EXPECT_TRUE(IsValidEscape('|'));
-}
-
-TEST(IsValidEscapeTest, IsTrueForSomeLetter) {
-  EXPECT_TRUE(IsValidEscape('d'));
-  EXPECT_TRUE(IsValidEscape('D'));
-  EXPECT_TRUE(IsValidEscape('s'));
-  EXPECT_TRUE(IsValidEscape('S'));
-  EXPECT_TRUE(IsValidEscape('w'));
-  EXPECT_TRUE(IsValidEscape('W'));
-}
-
-TEST(AtomMatchesCharTest, EscapedPunct) {
-  EXPECT_FALSE(AtomMatchesChar(true, '\\', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, '\\', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, '_', '.'));
-  EXPECT_FALSE(AtomMatchesChar(true, '.', 'a'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, '\\', '\\'));
-  EXPECT_TRUE(AtomMatchesChar(true, '_', '_'));
-  EXPECT_TRUE(AtomMatchesChar(true, '+', '+'));
-  EXPECT_TRUE(AtomMatchesChar(true, '.', '.'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_d) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', '.'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'd', '0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'd', '9'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_D) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'D', '0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'D', '9'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', '-'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_s) {
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '.'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '9'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 's', ' '));
-  EXPECT_TRUE(AtomMatchesChar(true, 's', '\n'));
-  EXPECT_TRUE(AtomMatchesChar(true, 's', '\t'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_S) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'S', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, 'S', '\r'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', '9'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_w) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '+'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '\n'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', '0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', 'b'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', 'C'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', '_'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_W) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', 'A'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', 'b'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', '9'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', '_'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '*'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '\n'));
-}
-
-TEST(AtomMatchesCharTest, EscapedWhiteSpace) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'f', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'f', '\n'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'n', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'n', '\r'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'r', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'r', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 't', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 't', 't'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'v', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'v', '\f'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'f', '\f'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'n', '\n'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'r', '\r'));
-  EXPECT_TRUE(AtomMatchesChar(true, 't', '\t'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'v', '\v'));
-}
-
-TEST(AtomMatchesCharTest, UnescapedDot) {
-  EXPECT_FALSE(AtomMatchesChar(false, '.', '\n'));
-
-  EXPECT_TRUE(AtomMatchesChar(false, '.', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', '.'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', ' '));
-}
-
-TEST(AtomMatchesCharTest, UnescapedChar) {
-  EXPECT_FALSE(AtomMatchesChar(false, 'a', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(false, 'a', 'b'));
-  EXPECT_FALSE(AtomMatchesChar(false, '$', 'a'));
-
-  EXPECT_TRUE(AtomMatchesChar(false, '$', '$'));
-  EXPECT_TRUE(AtomMatchesChar(false, '5', '5'));
-  EXPECT_TRUE(AtomMatchesChar(false, 'Z', 'Z'));
-}
-
-TEST(ValidateRegexTest, GeneratesFailureAndReturnsFalseForInvalid) {
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(NULL)),
-                          "NULL is not a valid simple regular expression");
-  EXPECT_NONFATAL_FAILURE(
-      ASSERT_FALSE(ValidateRegex("a\\")),
-      "Syntax error at index 1 in simple regular expression \"a\\\": ");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a\\")),
-                          "'\\' cannot appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\n\\")),
-                          "'\\' cannot appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\s\\hb")),
-                          "invalid escape sequence \"\\h\"");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^^")),
-                          "'^' can only appear at the beginning");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(".*^b")),
-                          "'^' can only appear at the beginning");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("$$")),
-                          "'$' can only appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^$a")),
-                          "'$' can only appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a(b")),
-                          "'(' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("ab)")),
-                          "')' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("[ab")),
-                          "'[' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a{2")),
-                          "'{' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("?")),
-                          "'?' can only follow a repeatable token");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^*")),
-                          "'*' can only follow a repeatable token");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("5*+")),
-                          "'+' can only follow a repeatable token");
-}
-
-TEST(ValidateRegexTest, ReturnsTrueForValid) {
-  EXPECT_TRUE(ValidateRegex(""));
-  EXPECT_TRUE(ValidateRegex("a"));
-  EXPECT_TRUE(ValidateRegex(".*"));
-  EXPECT_TRUE(ValidateRegex("^a_+"));
-  EXPECT_TRUE(ValidateRegex("^a\\t\\&?"));
-  EXPECT_TRUE(ValidateRegex("09*$"));
-  EXPECT_TRUE(ValidateRegex("^Z$"));
-  EXPECT_TRUE(ValidateRegex("a\\^Z\\$\\(\\)\\|\\[\\]\\{\\}"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrOne) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "a", "ba"));
-  // Repeating more than once.
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "aab"));
-
-  // Repeating zero times.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ba"));
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ab"));
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '#', '?', ".", "##"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrMany) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '*', "a$", "baab"));
-
-  // Repeating zero times.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "bc"));
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "abc"));
-  // Repeating more than once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '*', "-", "ab_1-g"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForOneOrMany) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "a$", "baab"));
-  // Repeating zero times.
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "bc"));
-
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "abc"));
-  // Repeating more than once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '+', "-", "ab_1-g"));
-}
-
-TEST(MatchRegexAtHeadTest, ReturnsTrueForEmptyRegex) {
-  EXPECT_TRUE(MatchRegexAtHead("", ""));
-  EXPECT_TRUE(MatchRegexAtHead("", "ab"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenDollarIsInRegex) {
-  EXPECT_FALSE(MatchRegexAtHead("$", "a"));
-
-  EXPECT_TRUE(MatchRegexAtHead("$", ""));
-  EXPECT_TRUE(MatchRegexAtHead("a$", "a"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithEscapeSequence) {
-  EXPECT_FALSE(MatchRegexAtHead("\\w", "+"));
-  EXPECT_FALSE(MatchRegexAtHead("\\W", "ab"));
-
-  EXPECT_TRUE(MatchRegexAtHead("\\sa", "\nab"));
-  EXPECT_TRUE(MatchRegexAtHead("\\d", "1a"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithRepetition) {
-  EXPECT_FALSE(MatchRegexAtHead(".+a", "abc"));
-  EXPECT_FALSE(MatchRegexAtHead("a?b", "aab"));
-
-  EXPECT_TRUE(MatchRegexAtHead(".*a", "bc12-ab"));
-  EXPECT_TRUE(MatchRegexAtHead("a?b", "b"));
-  EXPECT_TRUE(MatchRegexAtHead("a?b", "ab"));
-}
-
-TEST(MatchRegexAtHeadTest,
-     WorksWhenRegexStartsWithRepetionOfEscapeSequence) {
-  EXPECT_FALSE(MatchRegexAtHead("\\.+a", "abc"));
-  EXPECT_FALSE(MatchRegexAtHead("\\s?b", "  b"));
-
-  EXPECT_TRUE(MatchRegexAtHead("\\(*a", "((((ab"));
-  EXPECT_TRUE(MatchRegexAtHead("\\^?b", "^b"));
-  EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "b"));
-  EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "\\b"));
-}
-
-TEST(MatchRegexAtHeadTest, MatchesSequentially) {
-  EXPECT_FALSE(MatchRegexAtHead("ab.*c", "acabc"));
-
-  EXPECT_TRUE(MatchRegexAtHead("ab.*c", "ab-fsc"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsFalseWhenStringIsNull) {
-  EXPECT_FALSE(MatchRegexAnywhere("", NULL));
-}
-
-TEST(MatchRegexAnywhereTest, WorksWhenRegexStartsWithCaret) {
-  EXPECT_FALSE(MatchRegexAnywhere("^a", "ba"));
-  EXPECT_FALSE(MatchRegexAnywhere("^$", "a"));
-
-  EXPECT_TRUE(MatchRegexAnywhere("^a", "ab"));
-  EXPECT_TRUE(MatchRegexAnywhere("^", "ab"));
-  EXPECT_TRUE(MatchRegexAnywhere("^$", ""));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsFalseWhenNoMatch) {
-  EXPECT_FALSE(MatchRegexAnywhere("a", "bcde123"));
-  EXPECT_FALSE(MatchRegexAnywhere("a.+a", "--aa88888888"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingPrefix) {
-  EXPECT_TRUE(MatchRegexAnywhere("\\w+", "ab1_ - 5"));
-  EXPECT_TRUE(MatchRegexAnywhere(".*=", "="));
-  EXPECT_TRUE(MatchRegexAnywhere("x.*ab?.*bc", "xaaabc"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingNonPrefix) {
-  EXPECT_TRUE(MatchRegexAnywhere("\\w+", "$$$ ab1_ - 5"));
-  EXPECT_TRUE(MatchRegexAnywhere("\\.+=", "=  ...="));
-}
-
-// Tests RE's implicit constructors.
-TEST(RETest, ImplicitConstructorWorks) {
-  const RE empty("");
-  EXPECT_STREQ("", empty.pattern());
-
-  const RE simple("hello");
-  EXPECT_STREQ("hello", simple.pattern());
-}
-
-// Tests that RE's constructors reject invalid regular expressions.
-TEST(RETest, RejectsInvalidRegex) {
-  EXPECT_NONFATAL_FAILURE({
-    const RE normal(NULL);
-  }, "NULL is not a valid simple regular expression");
-
-  EXPECT_NONFATAL_FAILURE({
-    const RE normal(".*(\\w+");
-  }, "'(' is unsupported");
-
-  EXPECT_NONFATAL_FAILURE({
-    const RE invalid("^?");
-  }, "'?' can only follow a repeatable token");
-}
-
-// Tests RE::FullMatch().
-TEST(RETest, FullMatchWorks) {
-  const RE empty("");
-  EXPECT_TRUE(RE::FullMatch("", empty));
-  EXPECT_FALSE(RE::FullMatch("a", empty));
-
-  const RE re1("a");
-  EXPECT_TRUE(RE::FullMatch("a", re1));
-
-  const RE re("a.*z");
-  EXPECT_TRUE(RE::FullMatch("az", re));
-  EXPECT_TRUE(RE::FullMatch("axyz", re));
-  EXPECT_FALSE(RE::FullMatch("baz", re));
-  EXPECT_FALSE(RE::FullMatch("azy", re));
-}
-
-// Tests RE::PartialMatch().
-TEST(RETest, PartialMatchWorks) {
-  const RE empty("");
-  EXPECT_TRUE(RE::PartialMatch("", empty));
-  EXPECT_TRUE(RE::PartialMatch("a", empty));
-
-  const RE re("a.*z");
-  EXPECT_TRUE(RE::PartialMatch("az", re));
-  EXPECT_TRUE(RE::PartialMatch("axyz", re));
-  EXPECT_TRUE(RE::PartialMatch("baz", re));
-  EXPECT_TRUE(RE::PartialMatch("azy", re));
-  EXPECT_FALSE(RE::PartialMatch("zza", re));
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-TEST(CaptureTest, CapturesStdout) {
-  CaptureStdout();
-  fprintf(stdout, "abc");
-  EXPECT_STREQ("abc", GetCapturedStdout().c_str());
-
-  CaptureStdout();
-  fprintf(stdout, "def%cghi", '\0');
-  EXPECT_EQ(::std::string("def\0ghi", 7), ::std::string(GetCapturedStdout()));
-}
-
-TEST(CaptureTest, CapturesStderr) {
-  CaptureStderr();
-  fprintf(stderr, "jkl");
-  EXPECT_STREQ("jkl", GetCapturedStderr().c_str());
-
-  CaptureStderr();
-  fprintf(stderr, "jkl%cmno", '\0');
-  EXPECT_EQ(::std::string("jkl\0mno", 7), ::std::string(GetCapturedStderr()));
-}
-
-// Tests that stdout and stderr capture don't interfere with each other.
-TEST(CaptureTest, CapturesStdoutAndStderr) {
-  CaptureStdout();
-  CaptureStderr();
-  fprintf(stdout, "pqr");
-  fprintf(stderr, "stu");
-  EXPECT_STREQ("pqr", GetCapturedStdout().c_str());
-  EXPECT_STREQ("stu", GetCapturedStderr().c_str());
-}
-
-TEST(CaptureDeathTest, CannotReenterStdoutCapture) {
-  CaptureStdout();
-  EXPECT_DEATH_IF_SUPPORTED(CaptureStdout(),
-                            "Only one stdout capturer can exist at a time");
-  GetCapturedStdout();
-
-  // We cannot test stderr capturing using death tests as they use it
-  // themselves.
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-TEST(ThreadLocalTest, DefaultConstructorInitializesToDefaultValues) {
-  ThreadLocal<int> t1;
-  EXPECT_EQ(0, t1.get());
-
-  ThreadLocal<void*> t2;
-  EXPECT_TRUE(t2.get() == nullptr);
-}
-
-TEST(ThreadLocalTest, SingleParamConstructorInitializesToParam) {
-  ThreadLocal<int> t1(123);
-  EXPECT_EQ(123, t1.get());
-
-  int i = 0;
-  ThreadLocal<int*> t2(&i);
-  EXPECT_EQ(&i, t2.get());
-}
-
-class NoDefaultContructor {
- public:
-  explicit NoDefaultContructor(const char*) {}
-  NoDefaultContructor(const NoDefaultContructor&) {}
-};
-
-TEST(ThreadLocalTest, ValueDefaultContructorIsNotRequiredForParamVersion) {
-  ThreadLocal<NoDefaultContructor> bar(NoDefaultContructor("foo"));
-  bar.pointer();
-}
-
-TEST(ThreadLocalTest, GetAndPointerReturnSameValue) {
-  ThreadLocal<std::string> thread_local_string;
-
-  EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
-
-  // Verifies the condition still holds after calling set.
-  thread_local_string.set("foo");
-  EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
-}
-
-TEST(ThreadLocalTest, PointerAndConstPointerReturnSameValue) {
-  ThreadLocal<std::string> thread_local_string;
-  const ThreadLocal<std::string>& const_thread_local_string =
-      thread_local_string;
-
-  EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
-
-  thread_local_string.set("foo");
-  EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
-}
-
-#if GTEST_IS_THREADSAFE
-
-void AddTwo(int* param) { *param += 2; }
-
-TEST(ThreadWithParamTest, ConstructorExecutesThreadFunc) {
-  int i = 40;
-  ThreadWithParam<int*> thread(&AddTwo, &i, nullptr);
-  thread.Join();
-  EXPECT_EQ(42, i);
-}
-
-TEST(MutexDeathTest, AssertHeldShouldAssertWhenNotLocked) {
-  // AssertHeld() is flaky only in the presence of multiple threads accessing
-  // the lock. In this case, the test is robust.
-  EXPECT_DEATH_IF_SUPPORTED({
-    Mutex m;
-    { MutexLock lock(&m); }
-    m.AssertHeld();
-  },
-  "thread .*hold");
-}
-
-TEST(MutexTest, AssertHeldShouldNotAssertWhenLocked) {
-  Mutex m;
-  MutexLock lock(&m);
-  m.AssertHeld();
-}
-
-class AtomicCounterWithMutex {
- public:
-  explicit AtomicCounterWithMutex(Mutex* mutex) :
-    value_(0), mutex_(mutex), random_(42) {}
-
-  void Increment() {
-    MutexLock lock(mutex_);
-    int temp = value_;
-    {
-      // We need to put up a memory barrier to prevent reads and writes to
-      // value_ rearranged with the call to SleepMilliseconds when observed
-      // from other threads.
-#if GTEST_HAS_PTHREAD
-      // On POSIX, locking a mutex puts up a memory barrier.  We cannot use
-      // Mutex and MutexLock here or rely on their memory barrier
-      // functionality as we are testing them here.
-      pthread_mutex_t memory_barrier_mutex;
-      GTEST_CHECK_POSIX_SUCCESS_(
-          pthread_mutex_init(&memory_barrier_mutex, nullptr));
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&memory_barrier_mutex));
-
-      SleepMilliseconds(static_cast<int>(random_.Generate(30)));
-
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&memory_barrier_mutex));
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&memory_barrier_mutex));
-#elif GTEST_OS_WINDOWS
-      // On Windows, performing an interlocked access puts up a memory barrier.
-      volatile LONG dummy = 0;
-      ::InterlockedIncrement(&dummy);
-      SleepMilliseconds(static_cast<int>(random_.Generate(30)));
-      ::InterlockedIncrement(&dummy);
-#else
-# error "Memory barrier not implemented on this platform."
-#endif  // GTEST_HAS_PTHREAD
-    }
-    value_ = temp + 1;
-  }
-  int value() const { return value_; }
-
- private:
-  volatile int value_;
-  Mutex* const mutex_;  // Protects value_.
-  Random       random_;
-};
-
-void CountingThreadFunc(pair<AtomicCounterWithMutex*, int> param) {
-  for (int i = 0; i < param.second; ++i)
-      param.first->Increment();
-}
-
-// Tests that the mutex only lets one thread at a time to lock it.
-TEST(MutexTest, OnlyOneThreadCanLockAtATime) {
-  Mutex mutex;
-  AtomicCounterWithMutex locked_counter(&mutex);
-
-  typedef ThreadWithParam<pair<AtomicCounterWithMutex*, int> > ThreadType;
-  const int kCycleCount = 20;
-  const int kThreadCount = 7;
-  std::unique_ptr<ThreadType> counting_threads[kThreadCount];
-  Notification threads_can_start;
-  // Creates and runs kThreadCount threads that increment locked_counter
-  // kCycleCount times each.
-  for (int i = 0; i < kThreadCount; ++i) {
-    counting_threads[i].reset(new ThreadType(&CountingThreadFunc,
-                                             make_pair(&locked_counter,
-                                                       kCycleCount),
-                                             &threads_can_start));
-  }
-  threads_can_start.Notify();
-  for (int i = 0; i < kThreadCount; ++i)
-    counting_threads[i]->Join();
-
-  // If the mutex lets more than one thread to increment the counter at a
-  // time, they are likely to encounter a race condition and have some
-  // increments overwritten, resulting in the lower then expected counter
-  // value.
-  EXPECT_EQ(kCycleCount * kThreadCount, locked_counter.value());
-}
-
-template <typename T>
-void RunFromThread(void (func)(T), T param) {
-  ThreadWithParam<T> thread(func, param, nullptr);
-  thread.Join();
-}
-
-void RetrieveThreadLocalValue(
-    pair<ThreadLocal<std::string>*, std::string*> param) {
-  *param.second = param.first->get();
-}
-
-TEST(ThreadLocalTest, ParameterizedConstructorSetsDefault) {
-  ThreadLocal<std::string> thread_local_string("foo");
-  EXPECT_STREQ("foo", thread_local_string.get().c_str());
-
-  thread_local_string.set("bar");
-  EXPECT_STREQ("bar", thread_local_string.get().c_str());
-
-  std::string result;
-  RunFromThread(&RetrieveThreadLocalValue,
-                make_pair(&thread_local_string, &result));
-  EXPECT_STREQ("foo", result.c_str());
-}
-
-// Keeps track of whether of destructors being called on instances of
-// DestructorTracker.  On Windows, waits for the destructor call reports.
-class DestructorCall {
- public:
-  DestructorCall() {
-    invoked_ = false;
-#if GTEST_OS_WINDOWS
-    wait_event_.Reset(::CreateEvent(NULL, TRUE, FALSE, NULL));
-    GTEST_CHECK_(wait_event_.Get() != NULL);
-#endif
-  }
-
-  bool CheckDestroyed() const {
-#if GTEST_OS_WINDOWS
-    if (::WaitForSingleObject(wait_event_.Get(), 1000) != WAIT_OBJECT_0)
-      return false;
-#endif
-    return invoked_;
-  }
-
-  void ReportDestroyed() {
-    invoked_ = true;
-#if GTEST_OS_WINDOWS
-    ::SetEvent(wait_event_.Get());
-#endif
-  }
-
-  static std::vector<DestructorCall*>& List() { return *list_; }
-
-  static void ResetList() {
-    for (size_t i = 0; i < list_->size(); ++i) {
-      delete list_->at(i);
-    }
-    list_->clear();
-  }
-
- private:
-  bool invoked_;
-#if GTEST_OS_WINDOWS
-  AutoHandle wait_event_;
-#endif
-  static std::vector<DestructorCall*>* const list_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DestructorCall);
-};
-
-std::vector<DestructorCall*>* const DestructorCall::list_ =
-    new std::vector<DestructorCall*>;
-
-// DestructorTracker keeps track of whether its instances have been
-// destroyed.
-class DestructorTracker {
- public:
-  DestructorTracker() : index_(GetNewIndex()) {}
-  DestructorTracker(const DestructorTracker& /* rhs */)
-      : index_(GetNewIndex()) {}
-  ~DestructorTracker() {
-    // We never access DestructorCall::List() concurrently, so we don't need
-    // to protect this access with a mutex.
-    DestructorCall::List()[index_]->ReportDestroyed();
-  }
-
- private:
-  static size_t GetNewIndex() {
-    DestructorCall::List().push_back(new DestructorCall);
-    return DestructorCall::List().size() - 1;
-  }
-  const size_t index_;
-};
-
-typedef ThreadLocal<DestructorTracker>* ThreadParam;
-
-void CallThreadLocalGet(ThreadParam thread_local_param) {
-  thread_local_param->get();
-}
-
-// Tests that when a ThreadLocal object dies in a thread, it destroys
-// the managed object for that thread.
-TEST(ThreadLocalTest, DestroysManagedObjectForOwnThreadWhenDying) {
-  DestructorCall::ResetList();
-
-  {
-    ThreadLocal<DestructorTracker> thread_local_tracker;
-    ASSERT_EQ(0U, DestructorCall::List().size());
-
-    // This creates another DestructorTracker object for the main thread.
-    thread_local_tracker.get();
-    ASSERT_EQ(1U, DestructorCall::List().size());
-    ASSERT_FALSE(DestructorCall::List()[0]->CheckDestroyed());
-  }
-
-  // Now thread_local_tracker has died.
-  ASSERT_EQ(1U, DestructorCall::List().size());
-  EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
-
-  DestructorCall::ResetList();
-}
-
-// Tests that when a thread exits, the thread-local object for that
-// thread is destroyed.
-TEST(ThreadLocalTest, DestroysManagedObjectAtThreadExit) {
-  DestructorCall::ResetList();
-
-  {
-    ThreadLocal<DestructorTracker> thread_local_tracker;
-    ASSERT_EQ(0U, DestructorCall::List().size());
-
-    // This creates another DestructorTracker object in the new thread.
-    ThreadWithParam<ThreadParam> thread(&CallThreadLocalGet,
-                                        &thread_local_tracker, nullptr);
-    thread.Join();
-
-    // The thread has exited, and we should have a DestroyedTracker
-    // instance created for it. But it may not have been destroyed yet.
-    ASSERT_EQ(1U, DestructorCall::List().size());
-  }
-
-  // The thread has exited and thread_local_tracker has died.
-  ASSERT_EQ(1U, DestructorCall::List().size());
-  EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
-
-  DestructorCall::ResetList();
-}
-
-TEST(ThreadLocalTest, ThreadLocalMutationsAffectOnlyCurrentThread) {
-  ThreadLocal<std::string> thread_local_string;
-  thread_local_string.set("Foo");
-  EXPECT_STREQ("Foo", thread_local_string.get().c_str());
-
-  std::string result;
-  RunFromThread(&RetrieveThreadLocalValue,
-                make_pair(&thread_local_string, &result));
-  EXPECT_TRUE(result.empty());
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-#if GTEST_OS_WINDOWS
-TEST(WindowsTypesTest, HANDLEIsVoidStar) {
-  StaticAssertTypeEq<HANDLE, void*>();
-}
-
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-TEST(WindowsTypesTest, _CRITICAL_SECTIONIs_CRITICAL_SECTION) {
-  StaticAssertTypeEq<CRITICAL_SECTION, _CRITICAL_SECTION>();
-}
-#else
-TEST(WindowsTypesTest, CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION) {
-  StaticAssertTypeEq<CRITICAL_SECTION, _RTL_CRITICAL_SECTION>();
-}
-#endif
-
-#endif  // GTEST_OS_WINDOWS
-
-}  // namespace internal
-}  // namespace testing
diff --git a/third_party/googletest/googletest/test/googletest-printers-test.cc b/third_party/googletest/googletest/test/googletest-printers-test.cc
deleted file mode 100644
index e1e8e1c..0000000
--- a/third_party/googletest/googletest/test/googletest-printers-test.cc
+++ /dev/null
@@ -1,1962 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file tests the universal value printer.
-
-#include <algorithm>
-#include <cctype>
-#include <cstdint>
-#include <cstring>
-#include <deque>
-#include <forward_list>
-#include <limits>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest.h"
-
-// Some user-defined types for testing the universal value printer.
-
-// An anonymous enum type.
-enum AnonymousEnum {
-  kAE1 = -1,
-  kAE2 = 1
-};
-
-// An enum without a user-defined printer.
-enum EnumWithoutPrinter {
-  kEWP1 = -2,
-  kEWP2 = 42
-};
-
-// An enum with a << operator.
-enum EnumWithStreaming {
-  kEWS1 = 10
-};
-
-std::ostream& operator<<(std::ostream& os, EnumWithStreaming e) {
-  return os << (e == kEWS1 ? "kEWS1" : "invalid");
-}
-
-// An enum with a PrintTo() function.
-enum EnumWithPrintTo {
-  kEWPT1 = 1
-};
-
-void PrintTo(EnumWithPrintTo e, std::ostream* os) {
-  *os << (e == kEWPT1 ? "kEWPT1" : "invalid");
-}
-
-// A class implicitly convertible to BiggestInt.
-class BiggestIntConvertible {
- public:
-  operator ::testing::internal::BiggestInt() const { return 42; }
-};
-
-// A parent class with two child classes. The parent and one of the kids have
-// stream operators.
-class ParentClass {};
-class ChildClassWithStreamOperator : public ParentClass {};
-class ChildClassWithoutStreamOperator : public ParentClass {};
-static void operator<<(std::ostream& os, const ParentClass&) {
-  os << "ParentClass";
-}
-static void operator<<(std::ostream& os, const ChildClassWithStreamOperator&) {
-  os << "ChildClassWithStreamOperator";
-}
-
-// A user-defined unprintable class template in the global namespace.
-template <typename T>
-class UnprintableTemplateInGlobal {
- public:
-  UnprintableTemplateInGlobal() : value_() {}
- private:
-  T value_;
-};
-
-// A user-defined streamable type in the global namespace.
-class StreamableInGlobal {
- public:
-  virtual ~StreamableInGlobal() {}
-};
-
-inline void operator<<(::std::ostream& os, const StreamableInGlobal& /* x */) {
-  os << "StreamableInGlobal";
-}
-
-void operator<<(::std::ostream& os, const StreamableInGlobal* /* x */) {
-  os << "StreamableInGlobal*";
-}
-
-namespace foo {
-
-// A user-defined unprintable type in a user namespace.
-class UnprintableInFoo {
- public:
-  UnprintableInFoo() : z_(0) { memcpy(xy_, "\xEF\x12\x0\x0\x34\xAB\x0\x0", 8); }
-  double z() const { return z_; }
- private:
-  char xy_[8];
-  double z_;
-};
-
-// A user-defined printable type in a user-chosen namespace.
-struct PrintableViaPrintTo {
-  PrintableViaPrintTo() : value() {}
-  int value;
-};
-
-void PrintTo(const PrintableViaPrintTo& x, ::std::ostream* os) {
-  *os << "PrintableViaPrintTo: " << x.value;
-}
-
-// A type with a user-defined << for printing its pointer.
-struct PointerPrintable {
-};
-
-::std::ostream& operator<<(::std::ostream& os,
-                           const PointerPrintable* /* x */) {
-  return os << "PointerPrintable*";
-}
-
-// A user-defined printable class template in a user-chosen namespace.
-template <typename T>
-class PrintableViaPrintToTemplate {
- public:
-  explicit PrintableViaPrintToTemplate(const T& a_value) : value_(a_value) {}
-
-  const T& value() const { return value_; }
- private:
-  T value_;
-};
-
-template <typename T>
-void PrintTo(const PrintableViaPrintToTemplate<T>& x, ::std::ostream* os) {
-  *os << "PrintableViaPrintToTemplate: " << x.value();
-}
-
-// A user-defined streamable class template in a user namespace.
-template <typename T>
-class StreamableTemplateInFoo {
- public:
-  StreamableTemplateInFoo() : value_() {}
-
-  const T& value() const { return value_; }
- private:
-  T value_;
-};
-
-template <typename T>
-inline ::std::ostream& operator<<(::std::ostream& os,
-                                  const StreamableTemplateInFoo<T>& x) {
-  return os << "StreamableTemplateInFoo: " << x.value();
-}
-
-// A user-defined streamable type in a user namespace whose operator<< is
-// templated on the type of the output stream.
-struct TemplatedStreamableInFoo {};
-
-template <typename OutputStream>
-OutputStream& operator<<(OutputStream& os,
-                         const TemplatedStreamableInFoo& /*ts*/) {
-  os << "TemplatedStreamableInFoo";
-  return os;
-}
-
-// A user-defined streamable but recursively-defined container type in
-// a user namespace, it mimics therefore std::filesystem::path or
-// boost::filesystem::path.
-class PathLike {
- public:
-  struct iterator {
-    typedef PathLike value_type;
-
-    iterator& operator++();
-    PathLike& operator*();
-  };
-
-  using value_type = char;
-  using const_iterator = iterator;
-
-  PathLike() {}
-
-  iterator begin() const { return iterator(); }
-  iterator end() const { return iterator(); }
-
-  friend ::std::ostream& operator<<(::std::ostream& os, const PathLike&) {
-    return os << "Streamable-PathLike";
-  }
-};
-
-}  // namespace foo
-
-namespace testing {
-namespace {
-template <typename T>
-class Wrapper {
- public:
-  explicit Wrapper(T&& value) : value_(std::forward<T>(value)) {}
-
-  const T& value() const { return value_; }
-
- private:
-  T value_;
-};
-
-}  // namespace
-
-namespace internal {
-template <typename T>
-class UniversalPrinter<Wrapper<T>> {
- public:
-  static void Print(const Wrapper<T>& w, ::std::ostream* os) {
-    *os << "Wrapper(";
-    UniversalPrint(w.value(), os);
-    *os << ')';
-  }
-};
-}  // namespace internal
-
-
-namespace gtest_printers_test {
-
-using ::std::deque;
-using ::std::list;
-using ::std::make_pair;
-using ::std::map;
-using ::std::multimap;
-using ::std::multiset;
-using ::std::pair;
-using ::std::set;
-using ::std::vector;
-using ::testing::PrintToString;
-using ::testing::internal::FormatForComparisonFailureMessage;
-using ::testing::internal::ImplicitCast_;
-using ::testing::internal::NativeArray;
-using ::testing::internal::RelationToSourceReference;
-using ::testing::internal::Strings;
-using ::testing::internal::UniversalPrint;
-using ::testing::internal::UniversalPrinter;
-using ::testing::internal::UniversalTersePrint;
-using ::testing::internal::UniversalTersePrintTupleFieldsToStrings;
-
-// Prints a value to a string using the universal value printer.  This
-// is a helper for testing UniversalPrinter<T>::Print() for various types.
-template <typename T>
-std::string Print(const T& value) {
-  ::std::stringstream ss;
-  UniversalPrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-// Prints a value passed by reference to a string, using the universal
-// value printer.  This is a helper for testing
-// UniversalPrinter<T&>::Print() for various types.
-template <typename T>
-std::string PrintByRef(const T& value) {
-  ::std::stringstream ss;
-  UniversalPrinter<T&>::Print(value, &ss);
-  return ss.str();
-}
-
-// Tests printing various enum types.
-
-TEST(PrintEnumTest, AnonymousEnum) {
-  EXPECT_EQ("-1", Print(kAE1));
-  EXPECT_EQ("1", Print(kAE2));
-}
-
-TEST(PrintEnumTest, EnumWithoutPrinter) {
-  EXPECT_EQ("-2", Print(kEWP1));
-  EXPECT_EQ("42", Print(kEWP2));
-}
-
-TEST(PrintEnumTest, EnumWithStreaming) {
-  EXPECT_EQ("kEWS1", Print(kEWS1));
-  EXPECT_EQ("invalid", Print(static_cast<EnumWithStreaming>(0)));
-}
-
-TEST(PrintEnumTest, EnumWithPrintTo) {
-  EXPECT_EQ("kEWPT1", Print(kEWPT1));
-  EXPECT_EQ("invalid", Print(static_cast<EnumWithPrintTo>(0)));
-}
-
-// Tests printing a class implicitly convertible to BiggestInt.
-
-TEST(PrintClassTest, BiggestIntConvertible) {
-  EXPECT_EQ("42", Print(BiggestIntConvertible()));
-}
-
-// Tests printing various char types.
-
-// char.
-TEST(PrintCharTest, PlainChar) {
-  EXPECT_EQ("'\\0'", Print('\0'));
-  EXPECT_EQ("'\\'' (39, 0x27)", Print('\''));
-  EXPECT_EQ("'\"' (34, 0x22)", Print('"'));
-  EXPECT_EQ("'?' (63, 0x3F)", Print('?'));
-  EXPECT_EQ("'\\\\' (92, 0x5C)", Print('\\'));
-  EXPECT_EQ("'\\a' (7)", Print('\a'));
-  EXPECT_EQ("'\\b' (8)", Print('\b'));
-  EXPECT_EQ("'\\f' (12, 0xC)", Print('\f'));
-  EXPECT_EQ("'\\n' (10, 0xA)", Print('\n'));
-  EXPECT_EQ("'\\r' (13, 0xD)", Print('\r'));
-  EXPECT_EQ("'\\t' (9)", Print('\t'));
-  EXPECT_EQ("'\\v' (11, 0xB)", Print('\v'));
-  EXPECT_EQ("'\\x7F' (127)", Print('\x7F'));
-  EXPECT_EQ("'\\xFF' (255)", Print('\xFF'));
-  EXPECT_EQ("' ' (32, 0x20)", Print(' '));
-  EXPECT_EQ("'a' (97, 0x61)", Print('a'));
-}
-
-// signed char.
-TEST(PrintCharTest, SignedChar) {
-  EXPECT_EQ("'\\0'", Print(static_cast<signed char>('\0')));
-  EXPECT_EQ("'\\xCE' (-50)",
-            Print(static_cast<signed char>(-50)));
-}
-
-// unsigned char.
-TEST(PrintCharTest, UnsignedChar) {
-  EXPECT_EQ("'\\0'", Print(static_cast<unsigned char>('\0')));
-  EXPECT_EQ("'b' (98, 0x62)",
-            Print(static_cast<unsigned char>('b')));
-}
-
-TEST(PrintCharTest, Char16) {
-  EXPECT_EQ("U+0041", Print(u'A'));
-}
-
-TEST(PrintCharTest, Char32) {
-  EXPECT_EQ("U+0041", Print(U'A'));
-}
-
-#ifdef __cpp_char8_t
-TEST(PrintCharTest, Char8) {
-  EXPECT_EQ("U+0041", Print(u8'A'));
-}
-#endif
-
-// Tests printing other simple, built-in types.
-
-// bool.
-TEST(PrintBuiltInTypeTest, Bool) {
-  EXPECT_EQ("false", Print(false));
-  EXPECT_EQ("true", Print(true));
-}
-
-// wchar_t.
-TEST(PrintBuiltInTypeTest, Wchar_t) {
-  EXPECT_EQ("L'\\0'", Print(L'\0'));
-  EXPECT_EQ("L'\\'' (39, 0x27)", Print(L'\''));
-  EXPECT_EQ("L'\"' (34, 0x22)", Print(L'"'));
-  EXPECT_EQ("L'?' (63, 0x3F)", Print(L'?'));
-  EXPECT_EQ("L'\\\\' (92, 0x5C)", Print(L'\\'));
-  EXPECT_EQ("L'\\a' (7)", Print(L'\a'));
-  EXPECT_EQ("L'\\b' (8)", Print(L'\b'));
-  EXPECT_EQ("L'\\f' (12, 0xC)", Print(L'\f'));
-  EXPECT_EQ("L'\\n' (10, 0xA)", Print(L'\n'));
-  EXPECT_EQ("L'\\r' (13, 0xD)", Print(L'\r'));
-  EXPECT_EQ("L'\\t' (9)", Print(L'\t'));
-  EXPECT_EQ("L'\\v' (11, 0xB)", Print(L'\v'));
-  EXPECT_EQ("L'\\x7F' (127)", Print(L'\x7F'));
-  EXPECT_EQ("L'\\xFF' (255)", Print(L'\xFF'));
-  EXPECT_EQ("L' ' (32, 0x20)", Print(L' '));
-  EXPECT_EQ("L'a' (97, 0x61)", Print(L'a'));
-  EXPECT_EQ("L'\\x576' (1398)", Print(static_cast<wchar_t>(0x576)));
-  EXPECT_EQ("L'\\xC74D' (51021)", Print(static_cast<wchar_t>(0xC74D)));
-}
-
-// Test that int64_t provides more storage than wchar_t.
-TEST(PrintTypeSizeTest, Wchar_t) {
-  EXPECT_LT(sizeof(wchar_t), sizeof(int64_t));
-}
-
-// Various integer types.
-TEST(PrintBuiltInTypeTest, Integer) {
-  EXPECT_EQ("'\\xFF' (255)", Print(static_cast<unsigned char>(255)));  // uint8
-  EXPECT_EQ("'\\x80' (-128)", Print(static_cast<signed char>(-128)));  // int8
-  EXPECT_EQ("65535", Print(std::numeric_limits<uint16_t>::max()));  // uint16
-  EXPECT_EQ("-32768", Print(std::numeric_limits<int16_t>::min()));  // int16
-  EXPECT_EQ("4294967295",
-            Print(std::numeric_limits<uint32_t>::max()));  // uint32
-  EXPECT_EQ("-2147483648",
-            Print(std::numeric_limits<int32_t>::min()));  // int32
-  EXPECT_EQ("18446744073709551615",
-            Print(std::numeric_limits<uint64_t>::max()));  // uint64
-  EXPECT_EQ("-9223372036854775808",
-            Print(std::numeric_limits<int64_t>::min()));  // int64
-#ifdef __cpp_char8_t
-  EXPECT_EQ("U+0000",
-            Print(std::numeric_limits<char8_t>::min()));  // char8_t
-  EXPECT_EQ("U+00FF",
-            Print(std::numeric_limits<char8_t>::max()));  // char8_t
-#endif
-  EXPECT_EQ("U+0000",
-            Print(std::numeric_limits<char16_t>::min()));  // char16_t
-  EXPECT_EQ("U+FFFF",
-            Print(std::numeric_limits<char16_t>::max()));  // char16_t
-  EXPECT_EQ("U+0000",
-            Print(std::numeric_limits<char32_t>::min()));  // char32_t
-  EXPECT_EQ("U+FFFFFFFF",
-            Print(std::numeric_limits<char32_t>::max()));  // char32_t
-}
-
-// Size types.
-TEST(PrintBuiltInTypeTest, Size_t) {
-  EXPECT_EQ("1", Print(sizeof('a')));  // size_t.
-#if !GTEST_OS_WINDOWS
-  // Windows has no ssize_t type.
-  EXPECT_EQ("-2", Print(static_cast<ssize_t>(-2)));  // ssize_t.
-#endif  // !GTEST_OS_WINDOWS
-}
-
-// Floating-points.
-TEST(PrintBuiltInTypeTest, FloatingPoints) {
-  EXPECT_EQ("1.5", Print(1.5f));   // float
-  EXPECT_EQ("-2.5", Print(-2.5));  // double
-}
-
-// Since ::std::stringstream::operator<<(const void *) formats the pointer
-// output differently with different compilers, we have to create the expected
-// output first and use it as our expectation.
-static std::string PrintPointer(const void* p) {
-  ::std::stringstream expected_result_stream;
-  expected_result_stream << p;
-  return expected_result_stream.str();
-}
-
-// Tests printing C strings.
-
-// const char*.
-TEST(PrintCStringTest, Const) {
-  const char* p = "World";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"World\"", Print(p));
-}
-
-// char*.
-TEST(PrintCStringTest, NonConst) {
-  char p[] = "Hi";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"Hi\"",
-            Print(static_cast<char*>(p)));
-}
-
-// NULL C string.
-TEST(PrintCStringTest, Null) {
-  const char* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that C strings are escaped properly.
-TEST(PrintCStringTest, EscapesProperly) {
-  const char* p = "'\"?\\\a\b\f\n\r\t\v\x7F\xFF a";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"'\\\"?\\\\\\a\\b\\f"
-            "\\n\\r\\t\\v\\x7F\\xFF a\"",
-            Print(p));
-}
-
-#ifdef __cpp_char8_t
-// const char8_t*.
-TEST(PrintU8StringTest, Const) {
-  const char8_t* p = u8"界";
-  EXPECT_EQ(PrintPointer(p) + " pointing to u8\"\\xE7\\x95\\x8C\"", Print(p));
-}
-
-// char8_t*.
-TEST(PrintU8StringTest, NonConst) {
-  char8_t p[] = u8"世";
-  EXPECT_EQ(PrintPointer(p) + " pointing to u8\"\\xE4\\xB8\\x96\"",
-            Print(static_cast<char8_t*>(p)));
-}
-
-// NULL u8 string.
-TEST(PrintU8StringTest, Null) {
-  const char8_t* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that u8 strings are escaped properly.
-TEST(PrintU8StringTest, EscapesProperly) {
-  const char8_t* p = u8"'\"?\\\a\b\f\n\r\t\v\x7F\xFF hello 世界";
-  EXPECT_EQ(PrintPointer(p) +
-                " pointing to u8\"'\\\"?\\\\\\a\\b\\f\\n\\r\\t\\v\\x7F\\xFF "
-                "hello \\xE4\\xB8\\x96\\xE7\\x95\\x8C\"",
-            Print(p));
-}
-#endif
-
-// const char16_t*.
-TEST(PrintU16StringTest, Const) {
-  const char16_t* p = u"界";
-  EXPECT_EQ(PrintPointer(p) + " pointing to u\"\\x754C\"", Print(p));
-}
-
-// char16_t*.
-TEST(PrintU16StringTest, NonConst) {
-  char16_t p[] = u"世";
-  EXPECT_EQ(PrintPointer(p) + " pointing to u\"\\x4E16\"",
-            Print(static_cast<char16_t*>(p)));
-}
-
-// NULL u16 string.
-TEST(PrintU16StringTest, Null) {
-  const char16_t* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that u16 strings are escaped properly.
-TEST(PrintU16StringTest, EscapesProperly) {
-  const char16_t* p = u"'\"?\\\a\b\f\n\r\t\v\x7F\xFF hello 世界";
-  EXPECT_EQ(PrintPointer(p) +
-                " pointing to u\"'\\\"?\\\\\\a\\b\\f\\n\\r\\t\\v\\x7F\\xFF "
-                "hello \\x4E16\\x754C\"",
-            Print(p));
-}
-
-// const char32_t*.
-TEST(PrintU32StringTest, Const) {
-  const char32_t* p = U"🗺️";
-  EXPECT_EQ(PrintPointer(p) + " pointing to U\"\\x1F5FA\\xFE0F\"", Print(p));
-}
-
-// char32_t*.
-TEST(PrintU32StringTest, NonConst) {
-  char32_t p[] = U"🌌";
-  EXPECT_EQ(PrintPointer(p) + " pointing to U\"\\x1F30C\"",
-            Print(static_cast<char32_t*>(p)));
-}
-
-// NULL u32 string.
-TEST(PrintU32StringTest, Null) {
-  const char32_t* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that u32 strings are escaped properly.
-TEST(PrintU32StringTest, EscapesProperly) {
-  const char32_t* p = U"'\"?\\\a\b\f\n\r\t\v\x7F\xFF hello 🗺️";
-  EXPECT_EQ(PrintPointer(p) +
-                " pointing to U\"'\\\"?\\\\\\a\\b\\f\\n\\r\\t\\v\\x7F\\xFF "
-                "hello \\x1F5FA\\xFE0F\"",
-            Print(p));
-}
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-
-// const wchar_t*.
-TEST(PrintWideCStringTest, Const) {
-  const wchar_t* p = L"World";
-  EXPECT_EQ(PrintPointer(p) + " pointing to L\"World\"", Print(p));
-}
-
-// wchar_t*.
-TEST(PrintWideCStringTest, NonConst) {
-  wchar_t p[] = L"Hi";
-  EXPECT_EQ(PrintPointer(p) + " pointing to L\"Hi\"",
-            Print(static_cast<wchar_t*>(p)));
-}
-
-// NULL wide C string.
-TEST(PrintWideCStringTest, Null) {
-  const wchar_t* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that wide C strings are escaped properly.
-TEST(PrintWideCStringTest, EscapesProperly) {
-  const wchar_t s[] = {'\'', '"', '?', '\\', '\a', '\b', '\f', '\n', '\r',
-                       '\t', '\v', 0xD3, 0x576, 0x8D3, 0xC74D, ' ', 'a', '\0'};
-  EXPECT_EQ(PrintPointer(s) + " pointing to L\"'\\\"?\\\\\\a\\b\\f"
-            "\\n\\r\\t\\v\\xD3\\x576\\x8D3\\xC74D a\"",
-            Print(static_cast<const wchar_t*>(s)));
-}
-#endif  // native wchar_t
-
-// Tests printing pointers to other char types.
-
-// signed char*.
-TEST(PrintCharPointerTest, SignedChar) {
-  signed char* p = reinterpret_cast<signed char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const signed char*.
-TEST(PrintCharPointerTest, ConstSignedChar) {
-  signed char* p = reinterpret_cast<signed char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// unsigned char*.
-TEST(PrintCharPointerTest, UnsignedChar) {
-  unsigned char* p = reinterpret_cast<unsigned char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const unsigned char*.
-TEST(PrintCharPointerTest, ConstUnsignedChar) {
-  const unsigned char* p = reinterpret_cast<const unsigned char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing pointers to simple, built-in types.
-
-// bool*.
-TEST(PrintPointerToBuiltInTypeTest, Bool) {
-  bool* p = reinterpret_cast<bool*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// void*.
-TEST(PrintPointerToBuiltInTypeTest, Void) {
-  void* p = reinterpret_cast<void*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const void*.
-TEST(PrintPointerToBuiltInTypeTest, ConstVoid) {
-  const void* p = reinterpret_cast<const void*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing pointers to pointers.
-TEST(PrintPointerToPointerTest, IntPointerPointer) {
-  int** p = reinterpret_cast<int**>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing (non-member) function pointers.
-
-void MyFunction(int /* n */) {}
-
-TEST(PrintPointerTest, NonMemberFunctionPointer) {
-  // We cannot directly cast &MyFunction to const void* because the
-  // standard disallows casting between pointers to functions and
-  // pointers to objects, and some compilers (e.g. GCC 3.4) enforce
-  // this limitation.
-  EXPECT_EQ(
-      PrintPointer(reinterpret_cast<const void*>(
-          reinterpret_cast<internal::BiggestInt>(&MyFunction))),
-      Print(&MyFunction));
-  int (*p)(bool) = NULL;  // NOLINT
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// An assertion predicate determining whether a one string is a prefix for
-// another.
-template <typename StringType>
-AssertionResult HasPrefix(const StringType& str, const StringType& prefix) {
-  if (str.find(prefix, 0) == 0)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(prefix[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << begin_string_quote << prefix << "\" is not a prefix of "
-      << begin_string_quote << str << "\"\n";
-}
-
-// Tests printing member variable pointers.  Although they are called
-// pointers, they don't point to a location in the address space.
-// Their representation is implementation-defined.  Thus they will be
-// printed as raw bytes.
-
-struct Foo {
- public:
-  virtual ~Foo() {}
-  int MyMethod(char x) { return x + 1; }
-  virtual char MyVirtualMethod(int /* n */) { return 'a'; }
-
-  int value;
-};
-
-TEST(PrintPointerTest, MemberVariablePointer) {
-  EXPECT_TRUE(HasPrefix(Print(&Foo::value),
-                        Print(sizeof(&Foo::value)) + "-byte object "));
-  int Foo::*p = NULL;  // NOLINT
-  EXPECT_TRUE(HasPrefix(Print(p),
-                        Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests printing member function pointers.  Although they are called
-// pointers, they don't point to a location in the address space.
-// Their representation is implementation-defined.  Thus they will be
-// printed as raw bytes.
-TEST(PrintPointerTest, MemberFunctionPointer) {
-  EXPECT_TRUE(HasPrefix(Print(&Foo::MyMethod),
-                        Print(sizeof(&Foo::MyMethod)) + "-byte object "));
-  EXPECT_TRUE(
-      HasPrefix(Print(&Foo::MyVirtualMethod),
-                Print(sizeof((&Foo::MyVirtualMethod))) + "-byte object "));
-  int (Foo::*p)(char) = NULL;  // NOLINT
-  EXPECT_TRUE(HasPrefix(Print(p),
-                        Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests printing C arrays.
-
-// The difference between this and Print() is that it ensures that the
-// argument is a reference to an array.
-template <typename T, size_t N>
-std::string PrintArrayHelper(T (&a)[N]) {
-  return Print(a);
-}
-
-// One-dimensional array.
-TEST(PrintArrayTest, OneDimensionalArray) {
-  int a[5] = { 1, 2, 3, 4, 5 };
-  EXPECT_EQ("{ 1, 2, 3, 4, 5 }", PrintArrayHelper(a));
-}
-
-// Two-dimensional array.
-TEST(PrintArrayTest, TwoDimensionalArray) {
-  int a[2][5] = {
-    { 1, 2, 3, 4, 5 },
-    { 6, 7, 8, 9, 0 }
-  };
-  EXPECT_EQ("{ { 1, 2, 3, 4, 5 }, { 6, 7, 8, 9, 0 } }", PrintArrayHelper(a));
-}
-
-// Array of const elements.
-TEST(PrintArrayTest, ConstArray) {
-  const bool a[1] = { false };
-  EXPECT_EQ("{ false }", PrintArrayHelper(a));
-}
-
-// char array without terminating NUL.
-TEST(PrintArrayTest, CharArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  char a[] = { 'H', '\0', 'i' };
-  EXPECT_EQ("\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// char array with terminating NUL.
-TEST(PrintArrayTest, CharArrayWithTerminatingNul) {
-  const char a[] = "\0Hi";
-  EXPECT_EQ("\"\\0Hi\"", PrintArrayHelper(a));
-}
-
-#ifdef __cpp_char8_t
-// char_t array without terminating NUL.
-TEST(PrintArrayTest, Char8ArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  const char8_t a[] = {u8'H', u8'\0', u8'i'};
-  EXPECT_EQ("u8\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// char8_t array with terminating NUL.
-TEST(PrintArrayTest, Char8ArrayWithTerminatingNul) {
-  const char8_t a[] = u8"\0世界";
-  EXPECT_EQ(
-      "u8\"\\0\\xE4\\xB8\\x96\\xE7\\x95\\x8C\"",
-      PrintArrayHelper(a));
-}
-#endif
-
-// const char16_t array without terminating NUL.
-TEST(PrintArrayTest, Char16ArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  const char16_t a[] = {u'こ', u'\0', u'ん', u'に', u'ち', u'は'};
-  EXPECT_EQ("u\"\\x3053\\0\\x3093\\x306B\\x3061\\x306F\" (no terminating NUL)",
-            PrintArrayHelper(a));
-}
-
-// char16_t array with terminating NUL.
-TEST(PrintArrayTest, Char16ArrayWithTerminatingNul) {
-  const char16_t a[] = u"\0こんにちは";
-  EXPECT_EQ("u\"\\0\\x3053\\x3093\\x306B\\x3061\\x306F\"", PrintArrayHelper(a));
-}
-
-// char32_t array without terminating NUL.
-TEST(PrintArrayTest, Char32ArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  const char32_t a[] = {U'👋', U'\0', U'🌌'};
-  EXPECT_EQ("U\"\\x1F44B\\0\\x1F30C\" (no terminating NUL)",
-            PrintArrayHelper(a));
-}
-
-// char32_t array with terminating NUL.
-TEST(PrintArrayTest, Char32ArrayWithTerminatingNul) {
-  const char32_t a[] = U"\0👋🌌";
-  EXPECT_EQ("U\"\\0\\x1F44B\\x1F30C\"", PrintArrayHelper(a));
-}
-
-// wchar_t array without terminating NUL.
-TEST(PrintArrayTest, WCharArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  const wchar_t a[] = {L'H', L'\0', L'i'};
-  EXPECT_EQ("L\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// wchar_t array with terminating NUL.
-TEST(PrintArrayTest, WCharArrayWithTerminatingNul) {
-  const wchar_t a[] = L"\0Hi";
-  EXPECT_EQ("L\"\\0Hi\"", PrintArrayHelper(a));
-}
-
-// Array of objects.
-TEST(PrintArrayTest, ObjectArray) {
-  std::string a[3] = {"Hi", "Hello", "Ni hao"};
-  EXPECT_EQ("{ \"Hi\", \"Hello\", \"Ni hao\" }", PrintArrayHelper(a));
-}
-
-// Array with many elements.
-TEST(PrintArrayTest, BigArray) {
-  int a[100] = { 1, 2, 3 };
-  EXPECT_EQ("{ 1, 2, 3, 0, 0, 0, 0, 0, ..., 0, 0, 0, 0, 0, 0, 0, 0 }",
-            PrintArrayHelper(a));
-}
-
-// Tests printing ::string and ::std::string.
-
-// ::std::string.
-TEST(PrintStringTest, StringInStdNamespace) {
-  const char s[] = "'\"?\\\a\b\f\n\0\r\t\v\x7F\xFF a";
-  const ::std::string str(s, sizeof(s));
-  EXPECT_EQ("\"'\\\"?\\\\\\a\\b\\f\\n\\0\\r\\t\\v\\x7F\\xFF a\\0\"",
-            Print(str));
-}
-
-TEST(PrintStringTest, StringAmbiguousHex) {
-  // "\x6BANANA" is ambiguous, it can be interpreted as starting with either of:
-  // '\x6', '\x6B', or '\x6BA'.
-
-  // a hex escaping sequence following by a decimal digit
-  EXPECT_EQ("\"0\\x12\" \"3\"", Print(::std::string("0\x12" "3")));
-  // a hex escaping sequence following by a hex digit (lower-case)
-  EXPECT_EQ("\"mm\\x6\" \"bananas\"", Print(::std::string("mm\x6" "bananas")));
-  // a hex escaping sequence following by a hex digit (upper-case)
-  EXPECT_EQ("\"NOM\\x6\" \"BANANA\"", Print(::std::string("NOM\x6" "BANANA")));
-  // a hex escaping sequence following by a non-xdigit
-  EXPECT_EQ("\"!\\x5-!\"", Print(::std::string("!\x5-!")));
-}
-
-// Tests printing ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-// ::std::wstring.
-TEST(PrintWideStringTest, StringInStdNamespace) {
-  const wchar_t s[] = L"'\"?\\\a\b\f\n\0\r\t\v\xD3\x576\x8D3\xC74D a";
-  const ::std::wstring str(s, sizeof(s)/sizeof(wchar_t));
-  EXPECT_EQ("L\"'\\\"?\\\\\\a\\b\\f\\n\\0\\r\\t\\v"
-            "\\xD3\\x576\\x8D3\\xC74D a\\0\"",
-            Print(str));
-}
-
-TEST(PrintWideStringTest, StringAmbiguousHex) {
-  // same for wide strings.
-  EXPECT_EQ("L\"0\\x12\" L\"3\"", Print(::std::wstring(L"0\x12" L"3")));
-  EXPECT_EQ("L\"mm\\x6\" L\"bananas\"",
-            Print(::std::wstring(L"mm\x6" L"bananas")));
-  EXPECT_EQ("L\"NOM\\x6\" L\"BANANA\"",
-            Print(::std::wstring(L"NOM\x6" L"BANANA")));
-  EXPECT_EQ("L\"!\\x5-!\"", Print(::std::wstring(L"!\x5-!")));
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-#ifdef __cpp_char8_t
-TEST(PrintStringTest, U8String) {
-  std::u8string str = u8"Hello, 世界";
-  EXPECT_EQ(str, str);  // Verify EXPECT_EQ compiles with this type.
-  EXPECT_EQ("u8\"Hello, \\xE4\\xB8\\x96\\xE7\\x95\\x8C\"", Print(str));
-}
-#endif
-
-TEST(PrintStringTest, U16String) {
-  std::u16string str = u"Hello, 世界";
-  EXPECT_EQ(str, str);  // Verify EXPECT_EQ compiles with this type.
-  EXPECT_EQ("u\"Hello, \\x4E16\\x754C\"", Print(str));
-}
-
-TEST(PrintStringTest, U32String) {
-  std::u32string str = U"Hello, 🗺️";
-  EXPECT_EQ(str, str);  // Verify EXPECT_EQ compiles with this type
-  EXPECT_EQ("U\"Hello, \\x1F5FA\\xFE0F\"", Print(str));
-}
-
-// Tests printing types that support generic streaming (i.e. streaming
-// to std::basic_ostream<Char, CharTraits> for any valid Char and
-// CharTraits types).
-
-// Tests printing a non-template type that supports generic streaming.
-
-class AllowsGenericStreaming {};
-
-template <typename Char, typename CharTraits>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreaming& /* a */) {
-  return os << "AllowsGenericStreaming";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, NonTemplateType) {
-  AllowsGenericStreaming a;
-  EXPECT_EQ("AllowsGenericStreaming", Print(a));
-}
-
-// Tests printing a template type that supports generic streaming.
-
-template <typename T>
-class AllowsGenericStreamingTemplate {};
-
-template <typename Char, typename CharTraits, typename T>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreamingTemplate<T>& /* a */) {
-  return os << "AllowsGenericStreamingTemplate";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, TemplateType) {
-  AllowsGenericStreamingTemplate<int> a;
-  EXPECT_EQ("AllowsGenericStreamingTemplate", Print(a));
-}
-
-// Tests printing a type that supports generic streaming and can be
-// implicitly converted to another printable type.
-
-template <typename T>
-class AllowsGenericStreamingAndImplicitConversionTemplate {
- public:
-  operator bool() const { return false; }
-};
-
-template <typename Char, typename CharTraits, typename T>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreamingAndImplicitConversionTemplate<T>& /* a */) {
-  return os << "AllowsGenericStreamingAndImplicitConversionTemplate";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, TypeImplicitlyConvertible) {
-  AllowsGenericStreamingAndImplicitConversionTemplate<int> a;
-  EXPECT_EQ("AllowsGenericStreamingAndImplicitConversionTemplate", Print(a));
-}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-
-// Tests printing internal::StringView.
-
-TEST(PrintStringViewTest, SimpleStringView) {
-  const internal::StringView sp = "Hello";
-  EXPECT_EQ("\"Hello\"", Print(sp));
-}
-
-TEST(PrintStringViewTest, UnprintableCharacters) {
-  const char str[] = "NUL (\0) and \r\t";
-  const internal::StringView sp(str, sizeof(str) - 1);
-  EXPECT_EQ("\"NUL (\\0) and \\r\\t\"", Print(sp));
-}
-
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-// Tests printing STL containers.
-
-TEST(PrintStlContainerTest, EmptyDeque) {
-  deque<char> empty;
-  EXPECT_EQ("{}", Print(empty));
-}
-
-TEST(PrintStlContainerTest, NonEmptyDeque) {
-  deque<int> non_empty;
-  non_empty.push_back(1);
-  non_empty.push_back(3);
-  EXPECT_EQ("{ 1, 3 }", Print(non_empty));
-}
-
-
-TEST(PrintStlContainerTest, OneElementHashMap) {
-  ::std::unordered_map<int, char> map1;
-  map1[1] = 'a';
-  EXPECT_EQ("{ (1, 'a' (97, 0x61)) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, HashMultiMap) {
-  ::std::unordered_multimap<int, bool> map1;
-  map1.insert(make_pair(5, true));
-  map1.insert(make_pair(5, false));
-
-  // Elements of hash_multimap can be printed in any order.
-  const std::string result = Print(map1);
-  EXPECT_TRUE(result == "{ (5, true), (5, false) }" ||
-              result == "{ (5, false), (5, true) }")
-                  << " where Print(map1) returns \"" << result << "\".";
-}
-
-
-
-TEST(PrintStlContainerTest, HashSet) {
-  ::std::unordered_set<int> set1;
-  set1.insert(1);
-  EXPECT_EQ("{ 1 }", Print(set1));
-}
-
-TEST(PrintStlContainerTest, HashMultiSet) {
-  const int kSize = 5;
-  int a[kSize] = { 1, 1, 2, 5, 1 };
-  ::std::unordered_multiset<int> set1(a, a + kSize);
-
-  // Elements of hash_multiset can be printed in any order.
-  const std::string result = Print(set1);
-  const std::string expected_pattern = "{ d, d, d, d, d }";  // d means a digit.
-
-  // Verifies the result matches the expected pattern; also extracts
-  // the numbers in the result.
-  ASSERT_EQ(expected_pattern.length(), result.length());
-  std::vector<int> numbers;
-  for (size_t i = 0; i != result.length(); i++) {
-    if (expected_pattern[i] == 'd') {
-      ASSERT_NE(isdigit(static_cast<unsigned char>(result[i])), 0);
-      numbers.push_back(result[i] - '0');
-    } else {
-      EXPECT_EQ(expected_pattern[i], result[i]) << " where result is "
-                                                << result;
-    }
-  }
-
-  // Makes sure the result contains the right numbers.
-  std::sort(numbers.begin(), numbers.end());
-  std::sort(a, a + kSize);
-  EXPECT_TRUE(std::equal(a, a + kSize, numbers.begin()));
-}
-
-
-TEST(PrintStlContainerTest, List) {
-  const std::string a[] = {"hello", "world"};
-  const list<std::string> strings(a, a + 2);
-  EXPECT_EQ("{ \"hello\", \"world\" }", Print(strings));
-}
-
-TEST(PrintStlContainerTest, Map) {
-  map<int, bool> map1;
-  map1[1] = true;
-  map1[5] = false;
-  map1[3] = true;
-  EXPECT_EQ("{ (1, true), (3, true), (5, false) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, MultiMap) {
-  multimap<bool, int> map1;
-  // The make_pair template function would deduce the type as
-  // pair<bool, int> here, and since the key part in a multimap has to
-  // be constant, without a templated ctor in the pair class (as in
-  // libCstd on Solaris), make_pair call would fail to compile as no
-  // implicit conversion is found.  Thus explicit typename is used
-  // here instead.
-  map1.insert(pair<const bool, int>(true, 0));
-  map1.insert(pair<const bool, int>(true, 1));
-  map1.insert(pair<const bool, int>(false, 2));
-  EXPECT_EQ("{ (false, 2), (true, 0), (true, 1) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, Set) {
-  const unsigned int a[] = { 3, 0, 5 };
-  set<unsigned int> set1(a, a + 3);
-  EXPECT_EQ("{ 0, 3, 5 }", Print(set1));
-}
-
-TEST(PrintStlContainerTest, MultiSet) {
-  const int a[] = { 1, 1, 2, 5, 1 };
-  multiset<int> set1(a, a + 5);
-  EXPECT_EQ("{ 1, 1, 1, 2, 5 }", Print(set1));
-}
-
-
-TEST(PrintStlContainerTest, SinglyLinkedList) {
-  int a[] = { 9, 2, 8 };
-  const std::forward_list<int> ints(a, a + 3);
-  EXPECT_EQ("{ 9, 2, 8 }", Print(ints));
-}
-
-TEST(PrintStlContainerTest, Pair) {
-  pair<const bool, int> p(true, 5);
-  EXPECT_EQ("(true, 5)", Print(p));
-}
-
-TEST(PrintStlContainerTest, Vector) {
-  vector<int> v;
-  v.push_back(1);
-  v.push_back(2);
-  EXPECT_EQ("{ 1, 2 }", Print(v));
-}
-
-TEST(PrintStlContainerTest, LongSequence) {
-  const int a[100] = { 1, 2, 3 };
-  const vector<int> v(a, a + 100);
-  EXPECT_EQ("{ 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "
-            "0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... }", Print(v));
-}
-
-TEST(PrintStlContainerTest, NestedContainer) {
-  const int a1[] = { 1, 2 };
-  const int a2[] = { 3, 4, 5 };
-  const list<int> l1(a1, a1 + 2);
-  const list<int> l2(a2, a2 + 3);
-
-  vector<list<int> > v;
-  v.push_back(l1);
-  v.push_back(l2);
-  EXPECT_EQ("{ { 1, 2 }, { 3, 4, 5 } }", Print(v));
-}
-
-TEST(PrintStlContainerTest, OneDimensionalNativeArray) {
-  const int a[3] = { 1, 2, 3 };
-  NativeArray<int> b(a, 3, RelationToSourceReference());
-  EXPECT_EQ("{ 1, 2, 3 }", Print(b));
-}
-
-TEST(PrintStlContainerTest, TwoDimensionalNativeArray) {
-  const int a[2][3] = { { 1, 2, 3 }, { 4, 5, 6 } };
-  NativeArray<int[3]> b(a, 2, RelationToSourceReference());
-  EXPECT_EQ("{ { 1, 2, 3 }, { 4, 5, 6 } }", Print(b));
-}
-
-// Tests that a class named iterator isn't treated as a container.
-
-struct iterator {
-  char x;
-};
-
-TEST(PrintStlContainerTest, Iterator) {
-  iterator it = {};
-  EXPECT_EQ("1-byte object <00>", Print(it));
-}
-
-// Tests that a class named const_iterator isn't treated as a container.
-
-struct const_iterator {
-  char x;
-};
-
-TEST(PrintStlContainerTest, ConstIterator) {
-  const_iterator it = {};
-  EXPECT_EQ("1-byte object <00>", Print(it));
-}
-
-// Tests printing ::std::tuples.
-
-// Tuples of various arities.
-TEST(PrintStdTupleTest, VariousSizes) {
-  ::std::tuple<> t0;
-  EXPECT_EQ("()", Print(t0));
-
-  ::std::tuple<int> t1(5);
-  EXPECT_EQ("(5)", Print(t1));
-
-  ::std::tuple<char, bool> t2('a', true);
-  EXPECT_EQ("('a' (97, 0x61), true)", Print(t2));
-
-  ::std::tuple<bool, int, int> t3(false, 2, 3);
-  EXPECT_EQ("(false, 2, 3)", Print(t3));
-
-  ::std::tuple<bool, int, int, int> t4(false, 2, 3, 4);
-  EXPECT_EQ("(false, 2, 3, 4)", Print(t4));
-
-  const char* const str = "8";
-  ::std::tuple<bool, char, short, int32_t, int64_t, float, double,  // NOLINT
-               const char*, void*, std::string>
-      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str,  // NOLINT
-          nullptr, "10");
-  EXPECT_EQ("(false, 'a' (97, 0x61), 3, 4, 5, 1.5, -2.5, " + PrintPointer(str) +
-            " pointing to \"8\", NULL, \"10\")",
-            Print(t10));
-}
-
-// Nested tuples.
-TEST(PrintStdTupleTest, NestedTuple) {
-  ::std::tuple< ::std::tuple<int, bool>, char> nested(
-      ::std::make_tuple(5, true), 'a');
-  EXPECT_EQ("((5, true), 'a' (97, 0x61))", Print(nested));
-}
-
-TEST(PrintNullptrT, Basic) {
-  EXPECT_EQ("(nullptr)", Print(nullptr));
-}
-
-TEST(PrintReferenceWrapper, Printable) {
-  int x = 5;
-  EXPECT_EQ("@" + PrintPointer(&x) + " 5", Print(std::ref(x)));
-  EXPECT_EQ("@" + PrintPointer(&x) + " 5", Print(std::cref(x)));
-}
-
-TEST(PrintReferenceWrapper, Unprintable) {
-  ::foo::UnprintableInFoo up;
-  EXPECT_EQ(
-      "@" + PrintPointer(&up) +
-          " 16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-      Print(std::ref(up)));
-  EXPECT_EQ(
-      "@" + PrintPointer(&up) +
-          " 16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-      Print(std::cref(up)));
-}
-
-// Tests printing user-defined unprintable types.
-
-// Unprintable types in the global namespace.
-TEST(PrintUnprintableTypeTest, InGlobalNamespace) {
-  EXPECT_EQ("1-byte object <00>",
-            Print(UnprintableTemplateInGlobal<char>()));
-}
-
-// Unprintable types in a user namespace.
-TEST(PrintUnprintableTypeTest, InUserNamespace) {
-  EXPECT_EQ("16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-            Print(::foo::UnprintableInFoo()));
-}
-
-// Unprintable types are that too big to be printed completely.
-
-struct Big {
-  Big() { memset(array, 0, sizeof(array)); }
-  char array[257];
-};
-
-TEST(PrintUnpritableTypeTest, BigObject) {
-  EXPECT_EQ("257-byte object <00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 ... 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00>",
-            Print(Big()));
-}
-
-// Tests printing user-defined streamable types.
-
-// Streamable types in the global namespace.
-TEST(PrintStreamableTypeTest, InGlobalNamespace) {
-  StreamableInGlobal x;
-  EXPECT_EQ("StreamableInGlobal", Print(x));
-  EXPECT_EQ("StreamableInGlobal*", Print(&x));
-}
-
-// Printable template types in a user namespace.
-TEST(PrintStreamableTypeTest, TemplateTypeInUserNamespace) {
-  EXPECT_EQ("StreamableTemplateInFoo: 0",
-            Print(::foo::StreamableTemplateInFoo<int>()));
-}
-
-TEST(PrintStreamableTypeTest, TypeInUserNamespaceWithTemplatedStreamOperator) {
-  EXPECT_EQ("TemplatedStreamableInFoo",
-            Print(::foo::TemplatedStreamableInFoo()));
-}
-
-TEST(PrintStreamableTypeTest, SubclassUsesSuperclassStreamOperator) {
-  ParentClass parent;
-  ChildClassWithStreamOperator child_stream;
-  ChildClassWithoutStreamOperator child_no_stream;
-  EXPECT_EQ("ParentClass", Print(parent));
-  EXPECT_EQ("ChildClassWithStreamOperator", Print(child_stream));
-  EXPECT_EQ("ParentClass", Print(child_no_stream));
-}
-
-// Tests printing a user-defined recursive container type that has a <<
-// operator.
-TEST(PrintStreamableTypeTest, PathLikeInUserNamespace) {
-  ::foo::PathLike x;
-  EXPECT_EQ("Streamable-PathLike", Print(x));
-  const ::foo::PathLike cx;
-  EXPECT_EQ("Streamable-PathLike", Print(cx));
-}
-
-// Tests printing user-defined types that have a PrintTo() function.
-TEST(PrintPrintableTypeTest, InUserNamespace) {
-  EXPECT_EQ("PrintableViaPrintTo: 0",
-            Print(::foo::PrintableViaPrintTo()));
-}
-
-// Tests printing a pointer to a user-defined type that has a <<
-// operator for its pointer.
-TEST(PrintPrintableTypeTest, PointerInUserNamespace) {
-  ::foo::PointerPrintable x;
-  EXPECT_EQ("PointerPrintable*", Print(&x));
-}
-
-// Tests printing user-defined class template that have a PrintTo() function.
-TEST(PrintPrintableTypeTest, TemplateInUserNamespace) {
-  EXPECT_EQ("PrintableViaPrintToTemplate: 5",
-            Print(::foo::PrintableViaPrintToTemplate<int>(5)));
-}
-
-// Tests that the universal printer prints both the address and the
-// value of a reference.
-TEST(PrintReferenceTest, PrintsAddressAndValue) {
-  int n = 5;
-  EXPECT_EQ("@" + PrintPointer(&n) + " 5", PrintByRef(n));
-
-  int a[2][3] = {
-    { 0, 1, 2 },
-    { 3, 4, 5 }
-  };
-  EXPECT_EQ("@" + PrintPointer(a) + " { { 0, 1, 2 }, { 3, 4, 5 } }",
-            PrintByRef(a));
-
-  const ::foo::UnprintableInFoo x;
-  EXPECT_EQ("@" + PrintPointer(&x) + " 16-byte object "
-            "<EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-            PrintByRef(x));
-}
-
-// Tests that the universal printer prints a function pointer passed by
-// reference.
-TEST(PrintReferenceTest, HandlesFunctionPointer) {
-  void (*fp)(int n) = &MyFunction;
-  const std::string fp_pointer_string =
-      PrintPointer(reinterpret_cast<const void*>(&fp));
-  // We cannot directly cast &MyFunction to const void* because the
-  // standard disallows casting between pointers to functions and
-  // pointers to objects, and some compilers (e.g. GCC 3.4) enforce
-  // this limitation.
-  const std::string fp_string = PrintPointer(reinterpret_cast<const void*>(
-      reinterpret_cast<internal::BiggestInt>(fp)));
-  EXPECT_EQ("@" + fp_pointer_string + " " + fp_string,
-            PrintByRef(fp));
-}
-
-// Tests that the universal printer prints a member function pointer
-// passed by reference.
-TEST(PrintReferenceTest, HandlesMemberFunctionPointer) {
-  int (Foo::*p)(char ch) = &Foo::MyMethod;
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p),
-      "@" + PrintPointer(reinterpret_cast<const void*>(&p)) + " " +
-          Print(sizeof(p)) + "-byte object "));
-
-  char (Foo::*p2)(int n) = &Foo::MyVirtualMethod;
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p2),
-      "@" + PrintPointer(reinterpret_cast<const void*>(&p2)) + " " +
-          Print(sizeof(p2)) + "-byte object "));
-}
-
-// Tests that the universal printer prints a member variable pointer
-// passed by reference.
-TEST(PrintReferenceTest, HandlesMemberVariablePointer) {
-  int Foo::*p = &Foo::value;  // NOLINT
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p),
-      "@" + PrintPointer(&p) + " " + Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests that FormatForComparisonFailureMessage(), which is used to print
-// an operand in a comparison assertion (e.g. ASSERT_EQ) when the assertion
-// fails, formats the operand in the desired way.
-
-// scalar
-TEST(FormatForComparisonFailureMessageTest, WorksForScalar) {
-  EXPECT_STREQ("123",
-               FormatForComparisonFailureMessage(123, 124).c_str());
-}
-
-// non-char pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForNonCharPointer) {
-  int n = 0;
-  EXPECT_EQ(PrintPointer(&n),
-            FormatForComparisonFailureMessage(&n, &n).c_str());
-}
-
-// non-char array
-TEST(FormatForComparisonFailureMessageTest, FormatsNonCharArrayAsPointer) {
-  // In expression 'array == x', 'array' is compared by pointer.
-  // Therefore we want to print an array operand as a pointer.
-  int n[] = { 1, 2, 3 };
-  EXPECT_EQ(PrintPointer(n),
-            FormatForComparisonFailureMessage(n, n).c_str());
-}
-
-// Tests formatting a char pointer when it's compared with another pointer.
-// In this case we want to print it as a raw pointer, as the comparison is by
-// pointer.
-
-// char pointer vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForCharPointerVsPointer) {
-  // In expression 'p == x', where 'p' and 'x' are (const or not) char
-  // pointers, the operands are compared by pointer.  Therefore we
-  // want to print 'p' as a pointer instead of a C string (we don't
-  // even know if it's supposed to point to a valid C string).
-
-  // const char*
-  const char* s = "hello";
-  EXPECT_EQ(PrintPointer(s),
-            FormatForComparisonFailureMessage(s, s).c_str());
-
-  // char*
-  char ch = 'a';
-  EXPECT_EQ(PrintPointer(&ch),
-            FormatForComparisonFailureMessage(&ch, &ch).c_str());
-}
-
-// wchar_t pointer vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharPointerVsPointer) {
-  // In expression 'p == x', where 'p' and 'x' are (const or not) char
-  // pointers, the operands are compared by pointer.  Therefore we
-  // want to print 'p' as a pointer instead of a wide C string (we don't
-  // even know if it's supposed to point to a valid wide C string).
-
-  // const wchar_t*
-  const wchar_t* s = L"hello";
-  EXPECT_EQ(PrintPointer(s),
-            FormatForComparisonFailureMessage(s, s).c_str());
-
-  // wchar_t*
-  wchar_t ch = L'a';
-  EXPECT_EQ(PrintPointer(&ch),
-            FormatForComparisonFailureMessage(&ch, &ch).c_str());
-}
-
-// Tests formatting a char pointer when it's compared to a string object.
-// In this case we want to print the char pointer as a C string.
-
-// char pointer vs std::string
-TEST(FormatForComparisonFailureMessageTest, WorksForCharPointerVsStdString) {
-  const char* s = "hello \"world";
-  EXPECT_STREQ("\"hello \\\"world\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(s, ::std::string()).c_str());
-
-  // char*
-  char str[] = "hi\1";
-  char* p = str;
-  EXPECT_STREQ("\"hi\\x1\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(p, ::std::string()).c_str());
-}
-
-#if GTEST_HAS_STD_WSTRING
-// wchar_t pointer vs std::wstring
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharPointerVsStdWString) {
-  const wchar_t* s = L"hi \"world";
-  EXPECT_STREQ("L\"hi \\\"world\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(s, ::std::wstring()).c_str());
-
-  // wchar_t*
-  wchar_t str[] = L"hi\1";
-  wchar_t* p = str;
-  EXPECT_STREQ("L\"hi\\x1\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(p, ::std::wstring()).c_str());
-}
-#endif
-
-// Tests formatting a char array when it's compared with a pointer or array.
-// In this case we want to print the array as a row pointer, as the comparison
-// is by pointer.
-
-// char array vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsPointer) {
-  char str[] = "hi \"world\"";
-  char* p = nullptr;
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, p).c_str());
-}
-
-// char array vs char array
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsCharArray) {
-  const char str[] = "hi \"world\"";
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, str).c_str());
-}
-
-// wchar_t array vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsPointer) {
-  wchar_t str[] = L"hi \"world\"";
-  wchar_t* p = nullptr;
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, p).c_str());
-}
-
-// wchar_t array vs wchar_t array
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsWCharArray) {
-  const wchar_t str[] = L"hi \"world\"";
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, str).c_str());
-}
-
-// Tests formatting a char array when it's compared with a string object.
-// In this case we want to print the array as a C string.
-
-// char array vs std::string
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsStdString) {
-  const char str[] = "hi \"world\"";
-  EXPECT_STREQ("\"hi \\\"world\\\"\"",  // The content should be escaped.
-               FormatForComparisonFailureMessage(str, ::std::string()).c_str());
-}
-
-#if GTEST_HAS_STD_WSTRING
-// wchar_t array vs std::wstring
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsStdWString) {
-  const wchar_t str[] = L"hi \"w\0rld\"";
-  EXPECT_STREQ(
-      "L\"hi \\\"w\"",  // The content should be escaped.
-                        // Embedded NUL terminates the string.
-      FormatForComparisonFailureMessage(str, ::std::wstring()).c_str());
-}
-#endif
-
-// Useful for testing PrintToString().  We cannot use EXPECT_EQ()
-// there as its implementation uses PrintToString().  The caller must
-// ensure that 'value' has no side effect.
-#define EXPECT_PRINT_TO_STRING_(value, expected_string)         \
-  EXPECT_TRUE(PrintToString(value) == (expected_string))        \
-      << " where " #value " prints as " << (PrintToString(value))
-
-TEST(PrintToStringTest, WorksForScalar) {
-  EXPECT_PRINT_TO_STRING_(123, "123");
-}
-
-TEST(PrintToStringTest, WorksForPointerToConstChar) {
-  const char* p = "hello";
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\"");
-}
-
-TEST(PrintToStringTest, WorksForPointerToNonConstChar) {
-  char s[] = "hello";
-  char* p = s;
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\"");
-}
-
-TEST(PrintToStringTest, EscapesForPointerToConstChar) {
-  const char* p = "hello\n";
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\\n\"");
-}
-
-TEST(PrintToStringTest, EscapesForPointerToNonConstChar) {
-  char s[] = "hello\1";
-  char* p = s;
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\\x1\"");
-}
-
-TEST(PrintToStringTest, WorksForArray) {
-  int n[3] = { 1, 2, 3 };
-  EXPECT_PRINT_TO_STRING_(n, "{ 1, 2, 3 }");
-}
-
-TEST(PrintToStringTest, WorksForCharArray) {
-  char s[] = "hello";
-  EXPECT_PRINT_TO_STRING_(s, "\"hello\"");
-}
-
-TEST(PrintToStringTest, WorksForCharArrayWithEmbeddedNul) {
-  const char str_with_nul[] = "hello\0 world";
-  EXPECT_PRINT_TO_STRING_(str_with_nul, "\"hello\\0 world\"");
-
-  char mutable_str_with_nul[] = "hello\0 world";
-  EXPECT_PRINT_TO_STRING_(mutable_str_with_nul, "\"hello\\0 world\"");
-}
-
-  TEST(PrintToStringTest, ContainsNonLatin) {
-  // Sanity test with valid UTF-8. Prints both in hex and as text.
-  std::string non_ascii_str = ::std::string("오전 4:30");
-  EXPECT_PRINT_TO_STRING_(non_ascii_str,
-                          "\"\\xEC\\x98\\xA4\\xEC\\xA0\\x84 4:30\"\n"
-                          "    As Text: \"오전 4:30\"");
-  non_ascii_str = ::std::string("From ä — ẑ");
-  EXPECT_PRINT_TO_STRING_(non_ascii_str,
-                          "\"From \\xC3\\xA4 \\xE2\\x80\\x94 \\xE1\\xBA\\x91\""
-                          "\n    As Text: \"From ä — ẑ\"");
-}
-
-TEST(IsValidUTF8Test, IllFormedUTF8) {
-  // The following test strings are ill-formed UTF-8 and are printed
-  // as hex only (or ASCII, in case of ASCII bytes) because IsValidUTF8() is
-  // expected to fail, thus output does not contain "As Text:".
-
-  static const char *const kTestdata[][2] = {
-    // 2-byte lead byte followed by a single-byte character.
-    {"\xC3\x74", "\"\\xC3t\""},
-    // Valid 2-byte character followed by an orphan trail byte.
-    {"\xC3\x84\xA4", "\"\\xC3\\x84\\xA4\""},
-    // Lead byte without trail byte.
-    {"abc\xC3", "\"abc\\xC3\""},
-    // 3-byte lead byte, single-byte character, orphan trail byte.
-    {"x\xE2\x70\x94", "\"x\\xE2p\\x94\""},
-    // Truncated 3-byte character.
-    {"\xE2\x80", "\"\\xE2\\x80\""},
-    // Truncated 3-byte character followed by valid 2-byte char.
-    {"\xE2\x80\xC3\x84", "\"\\xE2\\x80\\xC3\\x84\""},
-    // Truncated 3-byte character followed by a single-byte character.
-    {"\xE2\x80\x7A", "\"\\xE2\\x80z\""},
-    // 3-byte lead byte followed by valid 3-byte character.
-    {"\xE2\xE2\x80\x94", "\"\\xE2\\xE2\\x80\\x94\""},
-    // 4-byte lead byte followed by valid 3-byte character.
-    {"\xF0\xE2\x80\x94", "\"\\xF0\\xE2\\x80\\x94\""},
-    // Truncated 4-byte character.
-    {"\xF0\xE2\x80", "\"\\xF0\\xE2\\x80\""},
-     // Invalid UTF-8 byte sequences embedded in other chars.
-    {"abc\xE2\x80\x94\xC3\x74xyc", "\"abc\\xE2\\x80\\x94\\xC3txyc\""},
-    {"abc\xC3\x84\xE2\x80\xC3\x84xyz",
-     "\"abc\\xC3\\x84\\xE2\\x80\\xC3\\x84xyz\""},
-    // Non-shortest UTF-8 byte sequences are also ill-formed.
-    // The classics: xC0, xC1 lead byte.
-    {"\xC0\x80", "\"\\xC0\\x80\""},
-    {"\xC1\x81", "\"\\xC1\\x81\""},
-    // Non-shortest sequences.
-    {"\xE0\x80\x80", "\"\\xE0\\x80\\x80\""},
-    {"\xf0\x80\x80\x80", "\"\\xF0\\x80\\x80\\x80\""},
-    // Last valid code point before surrogate range, should be printed as text,
-    // too.
-    {"\xED\x9F\xBF", "\"\\xED\\x9F\\xBF\"\n    As Text: \"퟿\""},
-    // Start of surrogate lead. Surrogates are not printed as text.
-    {"\xED\xA0\x80", "\"\\xED\\xA0\\x80\""},
-    // Last non-private surrogate lead.
-    {"\xED\xAD\xBF", "\"\\xED\\xAD\\xBF\""},
-    // First private-use surrogate lead.
-    {"\xED\xAE\x80", "\"\\xED\\xAE\\x80\""},
-    // Last private-use surrogate lead.
-    {"\xED\xAF\xBF", "\"\\xED\\xAF\\xBF\""},
-    // Mid-point of surrogate trail.
-    {"\xED\xB3\xBF", "\"\\xED\\xB3\\xBF\""},
-    // First valid code point after surrogate range, should be printed as text,
-    // too.
-    {"\xEE\x80\x80", "\"\\xEE\\x80\\x80\"\n    As Text: \"\""}
-  };
-
-  for (int i = 0; i < int(sizeof(kTestdata)/sizeof(kTestdata[0])); ++i) {
-    EXPECT_PRINT_TO_STRING_(kTestdata[i][0], kTestdata[i][1]);
-  }
-}
-
-#undef EXPECT_PRINT_TO_STRING_
-
-TEST(UniversalTersePrintTest, WorksForNonReference) {
-  ::std::stringstream ss;
-  UniversalTersePrint(123, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalTersePrintTest, WorksForReference) {
-  const int& n = 123;
-  ::std::stringstream ss;
-  UniversalTersePrint(n, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalTersePrintTest, WorksForCString) {
-  const char* s1 = "abc";
-  ::std::stringstream ss1;
-  UniversalTersePrint(s1, &ss1);
-  EXPECT_EQ("\"abc\"", ss1.str());
-
-  char* s2 = const_cast<char*>(s1);
-  ::std::stringstream ss2;
-  UniversalTersePrint(s2, &ss2);
-  EXPECT_EQ("\"abc\"", ss2.str());
-
-  const char* s3 = nullptr;
-  ::std::stringstream ss3;
-  UniversalTersePrint(s3, &ss3);
-  EXPECT_EQ("NULL", ss3.str());
-}
-
-TEST(UniversalPrintTest, WorksForNonReference) {
-  ::std::stringstream ss;
-  UniversalPrint(123, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForReference) {
-  const int& n = 123;
-  ::std::stringstream ss;
-  UniversalPrint(n, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForPairWithConst) {
-  std::pair<const Wrapper<std::string>, int> p(Wrapper<std::string>("abc"), 1);
-  ::std::stringstream ss;
-  UniversalPrint(p, &ss);
-  EXPECT_EQ("(Wrapper(\"abc\"), 1)", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForCString) {
-  const char* s1 = "abc";
-  ::std::stringstream ss1;
-  UniversalPrint(s1, &ss1);
-  EXPECT_EQ(PrintPointer(s1) + " pointing to \"abc\"", std::string(ss1.str()));
-
-  char* s2 = const_cast<char*>(s1);
-  ::std::stringstream ss2;
-  UniversalPrint(s2, &ss2);
-  EXPECT_EQ(PrintPointer(s2) + " pointing to \"abc\"", std::string(ss2.str()));
-
-  const char* s3 = nullptr;
-  ::std::stringstream ss3;
-  UniversalPrint(s3, &ss3);
-  EXPECT_EQ("NULL", ss3.str());
-}
-
-TEST(UniversalPrintTest, WorksForCharArray) {
-  const char str[] = "\"Line\0 1\"\nLine 2";
-  ::std::stringstream ss1;
-  UniversalPrint(str, &ss1);
-  EXPECT_EQ("\"\\\"Line\\0 1\\\"\\nLine 2\"", ss1.str());
-
-  const char mutable_str[] = "\"Line\0 1\"\nLine 2";
-  ::std::stringstream ss2;
-  UniversalPrint(mutable_str, &ss2);
-  EXPECT_EQ("\"\\\"Line\\0 1\\\"\\nLine 2\"", ss2.str());
-}
-
-TEST(UniversalPrintTest, IncompleteType) {
-  struct Incomplete;
-  char some_object = 0;
-  EXPECT_EQ("(incomplete type)",
-            PrintToString(reinterpret_cast<Incomplete&>(some_object)));
-}
-
-TEST(UniversalPrintTest, SmartPointers) {
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<int>()));
-  std::unique_ptr<int> p(new int(17));
-  EXPECT_EQ("(ptr = " + PrintPointer(p.get()) + ", value = 17)",
-            PrintToString(p));
-  std::unique_ptr<int[]> p2(new int[2]);
-  EXPECT_EQ("(" + PrintPointer(p2.get()) + ")", PrintToString(p2));
-
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<int>()));
-  std::shared_ptr<int> p3(new int(1979));
-  EXPECT_EQ("(ptr = " + PrintPointer(p3.get()) + ", value = 1979)",
-            PrintToString(p3));
-#if __cpp_lib_shared_ptr_arrays >= 201611L
-  std::shared_ptr<int[]> p4(new int[2]);
-  EXPECT_EQ("(" + PrintPointer(p4.get()) + ")", PrintToString(p4));
-#endif
-
-  // modifiers
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<const int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<volatile int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<volatile const int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<int[]>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<const int[]>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<volatile int[]>()));
-  EXPECT_EQ("(nullptr)",
-            PrintToString(std::unique_ptr<volatile const int[]>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<const int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<volatile int>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<volatile const int>()));
-#if __cpp_lib_shared_ptr_arrays >= 201611L
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<int[]>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<const int[]>()));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<volatile int[]>()));
-  EXPECT_EQ("(nullptr)",
-            PrintToString(std::shared_ptr<volatile const int[]>()));
-#endif
-
-  // void
-  EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<void, void (*)(void*)>(
-                             nullptr, nullptr)));
-  EXPECT_EQ("(" + PrintPointer(p.get()) + ")",
-            PrintToString(
-                std::unique_ptr<void, void (*)(void*)>(p.get(), [](void*) {})));
-  EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<void>()));
-  EXPECT_EQ("(" + PrintPointer(p.get()) + ")",
-            PrintToString(std::shared_ptr<void>(p.get(), [](void*) {})));
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsEmptyTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(::std::make_tuple());
-  EXPECT_EQ(0u, result.size());
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsOneTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::make_tuple(1));
-  ASSERT_EQ(1u, result.size());
-  EXPECT_EQ("1", result[0]);
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsTwoTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::make_tuple(1, 'a'));
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("1", result[0]);
-  EXPECT_EQ("'a' (97, 0x61)", result[1]);
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsTersely) {
-  const int n = 1;
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::tuple<const int&, const char*>(n, "a"));
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("1", result[0]);
-  EXPECT_EQ("\"a\"", result[1]);
-}
-
-#if GTEST_INTERNAL_HAS_ANY
-class PrintAnyTest : public ::testing::Test {
- protected:
-  template <typename T>
-  static std::string ExpectedTypeName() {
-#if GTEST_HAS_RTTI
-    return internal::GetTypeName<T>();
-#else
-    return "<unknown_type>";
-#endif  // GTEST_HAS_RTTI
-  }
-};
-
-TEST_F(PrintAnyTest, Empty) {
-  internal::Any any;
-  EXPECT_EQ("no value", PrintToString(any));
-}
-
-TEST_F(PrintAnyTest, NonEmpty) {
-  internal::Any any;
-  constexpr int val1 = 10;
-  const std::string val2 = "content";
-
-  any = val1;
-  EXPECT_EQ("value of type " + ExpectedTypeName<int>(), PrintToString(any));
-
-  any = val2;
-  EXPECT_EQ("value of type " + ExpectedTypeName<std::string>(),
-            PrintToString(any));
-}
-#endif  // GTEST_INTERNAL_HAS_ANY
-
-#if GTEST_INTERNAL_HAS_OPTIONAL
-TEST(PrintOptionalTest, Basic) {
-  internal::Optional<int> value;
-  EXPECT_EQ("(nullopt)", PrintToString(value));
-  value = {7};
-  EXPECT_EQ("(7)", PrintToString(value));
-  EXPECT_EQ("(1.1)", PrintToString(internal::Optional<double>{1.1}));
-  EXPECT_EQ("(\"A\")", PrintToString(internal::Optional<std::string>{"A"}));
-}
-#endif  // GTEST_INTERNAL_HAS_OPTIONAL
-
-#if GTEST_INTERNAL_HAS_VARIANT
-struct NonPrintable {
-  unsigned char contents = 17;
-};
-
-TEST(PrintOneofTest, Basic) {
-  using Type = internal::Variant<int, StreamableInGlobal, NonPrintable>;
-  EXPECT_EQ("('int(index = 0)' with value 7)", PrintToString(Type(7)));
-  EXPECT_EQ("('StreamableInGlobal(index = 1)' with value StreamableInGlobal)",
-            PrintToString(Type(StreamableInGlobal{})));
-  EXPECT_EQ(
-      "('testing::gtest_printers_test::NonPrintable(index = 2)' with value "
-      "1-byte object <11>)",
-      PrintToString(Type(NonPrintable{})));
-}
-#endif  // GTEST_INTERNAL_HAS_VARIANT
-namespace {
-class string_ref;
-
-/**
- * This is a synthetic pointer to a fixed size string.
- */
-class string_ptr {
- public:
-  string_ptr(const char* data, size_t size) : data_(data), size_(size) {}
-
-  string_ptr& operator++() noexcept {
-    data_ += size_;
-    return *this;
-  }
-
-  string_ref operator*() const noexcept;
-
- private:
-  const char* data_;
-  size_t size_;
-};
-
-/**
- * This is a synthetic reference of a fixed size string.
- */
-class string_ref {
- public:
-  string_ref(const char* data, size_t size) : data_(data), size_(size) {}
-
-  string_ptr operator&() const noexcept { return {data_, size_}; }  // NOLINT
-
-  bool operator==(const char* s) const noexcept {
-    if (size_ > 0 && data_[size_ - 1] != 0) {
-      return std::string(data_, size_) == std::string(s);
-    } else {
-      return std::string(data_) == std::string(s);
-    }
-  }
-
- private:
-  const char* data_;
-  size_t size_;
-};
-
-string_ref string_ptr::operator*() const noexcept { return {data_, size_}; }
-
-TEST(string_ref, compare) {
-  const char* s = "alex\0davidjohn\0";
-  string_ptr ptr(s, 5);
-  EXPECT_EQ(*ptr, "alex");
-  EXPECT_TRUE(*ptr == "alex");
-  ++ptr;
-  EXPECT_EQ(*ptr, "david");
-  EXPECT_TRUE(*ptr == "david");
-  ++ptr;
-  EXPECT_EQ(*ptr, "john");
-}
-
-}  // namespace
-
-}  // namespace gtest_printers_test
-}  // namespace testing
diff --git a/third_party/googletest/googletest/test/googletest-setuptestsuite-test.py b/third_party/googletest/googletest/test/googletest-setuptestsuite-test.py
deleted file mode 100755
index c82162f..0000000
--- a/third_party/googletest/googletest/test/googletest-setuptestsuite-test.py
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2019, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that SetUpTestSuite and TearDownTestSuite errors are noticed."""
-
-import gtest_test_utils
-
-COMMAND = gtest_test_utils.GetTestExecutablePath(
-    'googletest-setuptestsuite-test_')
-
-
-class GTestSetUpTestSuiteTest(gtest_test_utils.TestCase):
-
-  def testSetupErrorAndTearDownError(self):
-    p = gtest_test_utils.Subprocess(COMMAND)
-    self.assertNotEqual(p.exit_code, 0, msg=p.output)
-
-    self.assertIn(
-        '[  FAILED  ] SetupFailTest: SetUpTestSuite or TearDownTestSuite\n'
-        '[  FAILED  ] TearDownFailTest: SetUpTestSuite or TearDownTestSuite\n'
-        '\n'
-        ' 2 FAILED TEST SUITES\n',
-        p.output)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-setuptestsuite-test_.cc b/third_party/googletest/googletest/test/googletest-setuptestsuite-test_.cc
deleted file mode 100644
index a4bc4ef..0000000
--- a/third_party/googletest/googletest/test/googletest-setuptestsuite-test_.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-class SetupFailTest : public ::testing::Test {
- protected:
-  static void SetUpTestSuite() {
-    ASSERT_EQ("", "SET_UP_FAIL");
-  }
-};
-
-TEST_F(SetupFailTest, NoopPassingTest) {}
-
-class TearDownFailTest : public ::testing::Test {
- protected:
-  static void TearDownTestSuite() {
-    ASSERT_EQ("", "TEAR_DOWN_FAIL");
-  }
-};
-
-TEST_F(TearDownFailTest, NoopPassingTest) {}
diff --git a/third_party/googletest/googletest/test/googletest-shuffle-test.py b/third_party/googletest/googletest/test/googletest-shuffle-test.py
deleted file mode 100755
index 573cc5e..0000000
--- a/third_party/googletest/googletest/test/googletest-shuffle-test.py
+++ /dev/null
@@ -1,323 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that test shuffling works."""
-
-import os
-import gtest_test_utils
-
-# Command to run the googletest-shuffle-test_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-shuffle-test_')
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-
-TEST_FILTER = 'A*.A:A*.B:C*'
-
-ALL_TESTS = []
-ACTIVE_TESTS = []
-FILTERED_TESTS = []
-SHARDED_TESTS = []
-
-SHUFFLED_ALL_TESTS = []
-SHUFFLED_ACTIVE_TESTS = []
-SHUFFLED_FILTERED_TESTS = []
-SHUFFLED_SHARDED_TESTS = []
-
-
-def AlsoRunDisabledTestsFlag():
-  return '--gtest_also_run_disabled_tests'
-
-
-def FilterFlag(test_filter):
-  return '--gtest_filter=%s' % (test_filter,)
-
-
-def RepeatFlag(n):
-  return '--gtest_repeat=%s' % (n,)
-
-
-def ShuffleFlag():
-  return '--gtest_shuffle'
-
-
-def RandomSeedFlag(n):
-  return '--gtest_random_seed=%s' % (n,)
-
-
-def RunAndReturnOutput(extra_env, args):
-  """Runs the test program and returns its output."""
-
-  environ_copy = os.environ.copy()
-  environ_copy.update(extra_env)
-
-  return gtest_test_utils.Subprocess([COMMAND] + args, env=environ_copy).output
-
-
-def GetTestsForAllIterations(extra_env, args):
-  """Runs the test program and returns a list of test lists.
-
-  Args:
-    extra_env: a map from environment variables to their values
-    args: command line flags to pass to googletest-shuffle-test_
-
-  Returns:
-    A list where the i-th element is the list of tests run in the i-th
-    test iteration.
-  """
-
-  test_iterations = []
-  for line in RunAndReturnOutput(extra_env, args).split('\n'):
-    if line.startswith('----'):
-      tests = []
-      test_iterations.append(tests)
-    elif line.strip():
-      tests.append(line.strip())  # 'TestCaseName.TestName'
-
-  return test_iterations
-
-
-def GetTestCases(tests):
-  """Returns a list of test cases in the given full test names.
-
-  Args:
-    tests: a list of full test names
-
-  Returns:
-    A list of test cases from 'tests', in their original order.
-    Consecutive duplicates are removed.
-  """
-
-  test_cases = []
-  for test in tests:
-    test_case = test.split('.')[0]
-    if not test_case in test_cases:
-      test_cases.append(test_case)
-
-  return test_cases
-
-
-def CalculateTestLists():
-  """Calculates the list of tests run under different flags."""
-
-  if not ALL_TESTS:
-    ALL_TESTS.extend(
-        GetTestsForAllIterations({}, [AlsoRunDisabledTestsFlag()])[0])
-
-  if not ACTIVE_TESTS:
-    ACTIVE_TESTS.extend(GetTestsForAllIterations({}, [])[0])
-
-  if not FILTERED_TESTS:
-    FILTERED_TESTS.extend(
-        GetTestsForAllIterations({}, [FilterFlag(TEST_FILTER)])[0])
-
-  if not SHARDED_TESTS:
-    SHARDED_TESTS.extend(
-        GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                  SHARD_INDEX_ENV_VAR: '1'},
-                                 [])[0])
-
-  if not SHUFFLED_ALL_TESTS:
-    SHUFFLED_ALL_TESTS.extend(GetTestsForAllIterations(
-        {}, [AlsoRunDisabledTestsFlag(), ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-  if not SHUFFLED_ACTIVE_TESTS:
-    SHUFFLED_ACTIVE_TESTS.extend(GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-  if not SHUFFLED_FILTERED_TESTS:
-    SHUFFLED_FILTERED_TESTS.extend(GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1), FilterFlag(TEST_FILTER)])[0])
-
-  if not SHUFFLED_SHARDED_TESTS:
-    SHUFFLED_SHARDED_TESTS.extend(
-        GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                  SHARD_INDEX_ENV_VAR: '1'},
-                                 [ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-
-class GTestShuffleUnitTest(gtest_test_utils.TestCase):
-  """Tests test shuffling."""
-
-  def setUp(self):
-    CalculateTestLists()
-
-  def testShufflePreservesNumberOfTests(self):
-    self.assertEqual(len(ALL_TESTS), len(SHUFFLED_ALL_TESTS))
-    self.assertEqual(len(ACTIVE_TESTS), len(SHUFFLED_ACTIVE_TESTS))
-    self.assertEqual(len(FILTERED_TESTS), len(SHUFFLED_FILTERED_TESTS))
-    self.assertEqual(len(SHARDED_TESTS), len(SHUFFLED_SHARDED_TESTS))
-
-  def testShuffleChangesTestOrder(self):
-    self.assert_(SHUFFLED_ALL_TESTS != ALL_TESTS, SHUFFLED_ALL_TESTS)
-    self.assert_(SHUFFLED_ACTIVE_TESTS != ACTIVE_TESTS, SHUFFLED_ACTIVE_TESTS)
-    self.assert_(SHUFFLED_FILTERED_TESTS != FILTERED_TESTS,
-                 SHUFFLED_FILTERED_TESTS)
-    self.assert_(SHUFFLED_SHARDED_TESTS != SHARDED_TESTS,
-                 SHUFFLED_SHARDED_TESTS)
-
-  def testShuffleChangesTestCaseOrder(self):
-    self.assert_(GetTestCases(SHUFFLED_ALL_TESTS) != GetTestCases(ALL_TESTS),
-                 GetTestCases(SHUFFLED_ALL_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_ACTIVE_TESTS) != GetTestCases(ACTIVE_TESTS),
-        GetTestCases(SHUFFLED_ACTIVE_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_FILTERED_TESTS) != GetTestCases(FILTERED_TESTS),
-        GetTestCases(SHUFFLED_FILTERED_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_SHARDED_TESTS) != GetTestCases(SHARDED_TESTS),
-        GetTestCases(SHUFFLED_SHARDED_TESTS))
-
-  def testShuffleDoesNotRepeatTest(self):
-    for test in SHUFFLED_ALL_TESTS:
-      self.assertEqual(1, SHUFFLED_ALL_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_ACTIVE_TESTS:
-      self.assertEqual(1, SHUFFLED_ACTIVE_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_FILTERED_TESTS:
-      self.assertEqual(1, SHUFFLED_FILTERED_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_SHARDED_TESTS:
-      self.assertEqual(1, SHUFFLED_SHARDED_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-
-  def testShuffleDoesNotCreateNewTest(self):
-    for test in SHUFFLED_ALL_TESTS:
-      self.assert_(test in ALL_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_ACTIVE_TESTS:
-      self.assert_(test in ACTIVE_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_FILTERED_TESTS:
-      self.assert_(test in FILTERED_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_SHARDED_TESTS:
-      self.assert_(test in SHARDED_TESTS, '%s is an invalid test' % (test,))
-
-  def testShuffleIncludesAllTests(self):
-    for test in ALL_TESTS:
-      self.assert_(test in SHUFFLED_ALL_TESTS, '%s is missing' % (test,))
-    for test in ACTIVE_TESTS:
-      self.assert_(test in SHUFFLED_ACTIVE_TESTS, '%s is missing' % (test,))
-    for test in FILTERED_TESTS:
-      self.assert_(test in SHUFFLED_FILTERED_TESTS, '%s is missing' % (test,))
-    for test in SHARDED_TESTS:
-      self.assert_(test in SHUFFLED_SHARDED_TESTS, '%s is missing' % (test,))
-
-  def testShuffleLeavesDeathTestsAtFront(self):
-    non_death_test_found = False
-    for test in SHUFFLED_ACTIVE_TESTS:
-      if 'DeathTest.' in test:
-        self.assert_(not non_death_test_found,
-                     '%s appears after a non-death test' % (test,))
-      else:
-        non_death_test_found = True
-
-  def _VerifyTestCasesDoNotInterleave(self, tests):
-    test_cases = []
-    for test in tests:
-      [test_case, _] = test.split('.')
-      if test_cases and test_cases[-1] != test_case:
-        test_cases.append(test_case)
-        self.assertEqual(1, test_cases.count(test_case),
-                         'Test case %s is not grouped together in %s' %
-                         (test_case, tests))
-
-  def testShuffleDoesNotInterleaveTestCases(self):
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_ALL_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_ACTIVE_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_FILTERED_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_SHARDED_TESTS)
-
-  def testShuffleRestoresOrderAfterEachIteration(self):
-    # Get the test lists in all 3 iterations, using random seed 1, 2,
-    # and 3 respectively.  Google Test picks a different seed in each
-    # iteration, and this test depends on the current implementation
-    # picking successive numbers.  This dependency is not ideal, but
-    # makes the test much easier to write.
-    [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
-        GetTestsForAllIterations(
-            {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
-
-    # Make sure running the tests with random seed 1 gets the same
-    # order as in iteration 1 above.
-    [tests_with_seed1] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1)])
-    self.assertEqual(tests_in_iteration1, tests_with_seed1)
-
-    # Make sure running the tests with random seed 2 gets the same
-    # order as in iteration 2 above.  Success means that Google Test
-    # correctly restores the test order before re-shuffling at the
-    # beginning of iteration 2.
-    [tests_with_seed2] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(2)])
-    self.assertEqual(tests_in_iteration2, tests_with_seed2)
-
-    # Make sure running the tests with random seed 3 gets the same
-    # order as in iteration 3 above.  Success means that Google Test
-    # correctly restores the test order before re-shuffling at the
-    # beginning of iteration 3.
-    [tests_with_seed3] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(3)])
-    self.assertEqual(tests_in_iteration3, tests_with_seed3)
-
-  def testShuffleGeneratesNewOrderInEachIteration(self):
-    [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
-        GetTestsForAllIterations(
-            {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
-
-    self.assert_(tests_in_iteration1 != tests_in_iteration2,
-                 tests_in_iteration1)
-    self.assert_(tests_in_iteration1 != tests_in_iteration3,
-                 tests_in_iteration1)
-    self.assert_(tests_in_iteration2 != tests_in_iteration3,
-                 tests_in_iteration2)
-
-  def testShuffleShardedTestsPreservesPartition(self):
-    # If we run M tests on N shards, the same M tests should be run in
-    # total, regardless of the random seeds used by the shards.
-    [tests1] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '0'},
-                                        [ShuffleFlag(), RandomSeedFlag(1)])
-    [tests2] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '1'},
-                                        [ShuffleFlag(), RandomSeedFlag(20)])
-    [tests3] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '2'},
-                                        [ShuffleFlag(), RandomSeedFlag(25)])
-    sorted_sharded_tests = tests1 + tests2 + tests3
-    sorted_sharded_tests.sort()
-    sorted_active_tests = []
-    sorted_active_tests.extend(ACTIVE_TESTS)
-    sorted_active_tests.sort()
-    self.assertEqual(sorted_active_tests, sorted_sharded_tests)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-shuffle-test_.cc b/third_party/googletest/googletest/test/googletest-shuffle-test_.cc
deleted file mode 100644
index 4505663..0000000
--- a/third_party/googletest/googletest/test/googletest-shuffle-test_.cc
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Verifies that test shuffling works.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Message;
-using ::testing::Test;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::UnitTest;
-
-// The test methods are empty, as the sole purpose of this program is
-// to print the test names before/after shuffling.
-
-class A : public Test {};
-TEST_F(A, A) {}
-TEST_F(A, B) {}
-
-TEST(ADeathTest, A) {}
-TEST(ADeathTest, B) {}
-TEST(ADeathTest, C) {}
-
-TEST(B, A) {}
-TEST(B, B) {}
-TEST(B, C) {}
-TEST(B, DISABLED_D) {}
-TEST(B, DISABLED_E) {}
-
-TEST(BDeathTest, A) {}
-TEST(BDeathTest, B) {}
-
-TEST(C, A) {}
-TEST(C, B) {}
-TEST(C, C) {}
-TEST(C, DISABLED_D) {}
-
-TEST(CDeathTest, A) {}
-
-TEST(DISABLED_D, A) {}
-TEST(DISABLED_D, DISABLED_B) {}
-
-// This printer prints the full test names only, starting each test
-// iteration with a "----" marker.
-class TestNamePrinter : public EmptyTestEventListener {
- public:
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int /* iteration */) override {
-    printf("----\n");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    printf("%s.%s\n", test_info.test_suite_name(), test_info.name());
-  }
-};
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  // Replaces the default printer with TestNamePrinter, which prints
-  // the test name only.
-  TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-  delete listeners.Release(listeners.default_result_printer());
-  listeners.Append(new TestNamePrinter);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/googletest-test-part-test.cc b/third_party/googletest/googletest/test/googletest-test-part-test.cc
deleted file mode 100644
index 44cf7ca..0000000
--- a/third_party/googletest/googletest/test/googletest-test-part-test.cc
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gtest/gtest-test-part.h"
-
-#include "gtest/gtest.h"
-
-using testing::Message;
-using testing::Test;
-using testing::TestPartResult;
-using testing::TestPartResultArray;
-
-namespace {
-
-// Tests the TestPartResult class.
-
-// The test fixture for testing TestPartResult.
-class TestPartResultTest : public Test {
- protected:
-  TestPartResultTest()
-      : r1_(TestPartResult::kSuccess, "foo/bar.cc", 10, "Success!"),
-        r2_(TestPartResult::kNonFatalFailure, "foo/bar.cc", -1, "Failure!"),
-        r3_(TestPartResult::kFatalFailure, nullptr, -1, "Failure!"),
-        r4_(TestPartResult::kSkip, "foo/bar.cc", 2, "Skipped!") {}
-
-  TestPartResult r1_, r2_, r3_, r4_;
-};
-
-
-TEST_F(TestPartResultTest, ConstructorWorks) {
-  Message message;
-  message << "something is terribly wrong";
-  message << static_cast<const char*>(testing::internal::kStackTraceMarker);
-  message << "some unimportant stack trace";
-
-  const TestPartResult result(TestPartResult::kNonFatalFailure,
-                              "some_file.cc",
-                              42,
-                              message.GetString().c_str());
-
-  EXPECT_EQ(TestPartResult::kNonFatalFailure, result.type());
-  EXPECT_STREQ("some_file.cc", result.file_name());
-  EXPECT_EQ(42, result.line_number());
-  EXPECT_STREQ(message.GetString().c_str(), result.message());
-  EXPECT_STREQ("something is terribly wrong", result.summary());
-}
-
-TEST_F(TestPartResultTest, ResultAccessorsWork) {
-  const TestPartResult success(TestPartResult::kSuccess,
-                               "file.cc",
-                               42,
-                               "message");
-  EXPECT_TRUE(success.passed());
-  EXPECT_FALSE(success.failed());
-  EXPECT_FALSE(success.nonfatally_failed());
-  EXPECT_FALSE(success.fatally_failed());
-  EXPECT_FALSE(success.skipped());
-
-  const TestPartResult nonfatal_failure(TestPartResult::kNonFatalFailure,
-                                        "file.cc",
-                                        42,
-                                        "message");
-  EXPECT_FALSE(nonfatal_failure.passed());
-  EXPECT_TRUE(nonfatal_failure.failed());
-  EXPECT_TRUE(nonfatal_failure.nonfatally_failed());
-  EXPECT_FALSE(nonfatal_failure.fatally_failed());
-  EXPECT_FALSE(nonfatal_failure.skipped());
-
-  const TestPartResult fatal_failure(TestPartResult::kFatalFailure,
-                                     "file.cc",
-                                     42,
-                                     "message");
-  EXPECT_FALSE(fatal_failure.passed());
-  EXPECT_TRUE(fatal_failure.failed());
-  EXPECT_FALSE(fatal_failure.nonfatally_failed());
-  EXPECT_TRUE(fatal_failure.fatally_failed());
-  EXPECT_FALSE(fatal_failure.skipped());
-
-  const TestPartResult skip(TestPartResult::kSkip, "file.cc", 42, "message");
-  EXPECT_FALSE(skip.passed());
-  EXPECT_FALSE(skip.failed());
-  EXPECT_FALSE(skip.nonfatally_failed());
-  EXPECT_FALSE(skip.fatally_failed());
-  EXPECT_TRUE(skip.skipped());
-}
-
-// Tests TestPartResult::type().
-TEST_F(TestPartResultTest, type) {
-  EXPECT_EQ(TestPartResult::kSuccess, r1_.type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure, r2_.type());
-  EXPECT_EQ(TestPartResult::kFatalFailure, r3_.type());
-  EXPECT_EQ(TestPartResult::kSkip, r4_.type());
-}
-
-// Tests TestPartResult::file_name().
-TEST_F(TestPartResultTest, file_name) {
-  EXPECT_STREQ("foo/bar.cc", r1_.file_name());
-  EXPECT_STREQ(nullptr, r3_.file_name());
-  EXPECT_STREQ("foo/bar.cc", r4_.file_name());
-}
-
-// Tests TestPartResult::line_number().
-TEST_F(TestPartResultTest, line_number) {
-  EXPECT_EQ(10, r1_.line_number());
-  EXPECT_EQ(-1, r2_.line_number());
-  EXPECT_EQ(2, r4_.line_number());
-}
-
-// Tests TestPartResult::message().
-TEST_F(TestPartResultTest, message) {
-  EXPECT_STREQ("Success!", r1_.message());
-  EXPECT_STREQ("Skipped!", r4_.message());
-}
-
-// Tests TestPartResult::passed().
-TEST_F(TestPartResultTest, Passed) {
-  EXPECT_TRUE(r1_.passed());
-  EXPECT_FALSE(r2_.passed());
-  EXPECT_FALSE(r3_.passed());
-  EXPECT_FALSE(r4_.passed());
-}
-
-// Tests TestPartResult::failed().
-TEST_F(TestPartResultTest, Failed) {
-  EXPECT_FALSE(r1_.failed());
-  EXPECT_TRUE(r2_.failed());
-  EXPECT_TRUE(r3_.failed());
-  EXPECT_FALSE(r4_.failed());
-}
-
-// Tests TestPartResult::failed().
-TEST_F(TestPartResultTest, Skipped) {
-  EXPECT_FALSE(r1_.skipped());
-  EXPECT_FALSE(r2_.skipped());
-  EXPECT_FALSE(r3_.skipped());
-  EXPECT_TRUE(r4_.skipped());
-}
-
-// Tests TestPartResult::fatally_failed().
-TEST_F(TestPartResultTest, FatallyFailed) {
-  EXPECT_FALSE(r1_.fatally_failed());
-  EXPECT_FALSE(r2_.fatally_failed());
-  EXPECT_TRUE(r3_.fatally_failed());
-  EXPECT_FALSE(r4_.fatally_failed());
-}
-
-// Tests TestPartResult::nonfatally_failed().
-TEST_F(TestPartResultTest, NonfatallyFailed) {
-  EXPECT_FALSE(r1_.nonfatally_failed());
-  EXPECT_TRUE(r2_.nonfatally_failed());
-  EXPECT_FALSE(r3_.nonfatally_failed());
-  EXPECT_FALSE(r4_.nonfatally_failed());
-}
-
-// Tests the TestPartResultArray class.
-
-class TestPartResultArrayTest : public Test {
- protected:
-  TestPartResultArrayTest()
-      : r1_(TestPartResult::kNonFatalFailure, "foo/bar.cc", -1, "Failure 1"),
-        r2_(TestPartResult::kFatalFailure, "foo/bar.cc", -1, "Failure 2") {}
-
-  const TestPartResult r1_, r2_;
-};
-
-// Tests that TestPartResultArray initially has size 0.
-TEST_F(TestPartResultArrayTest, InitialSizeIsZero) {
-  TestPartResultArray results;
-  EXPECT_EQ(0, results.size());
-}
-
-// Tests that TestPartResultArray contains the given TestPartResult
-// after one Append() operation.
-TEST_F(TestPartResultArrayTest, ContainsGivenResultAfterAppend) {
-  TestPartResultArray results;
-  results.Append(r1_);
-  EXPECT_EQ(1, results.size());
-  EXPECT_STREQ("Failure 1", results.GetTestPartResult(0).message());
-}
-
-// Tests that TestPartResultArray contains the given TestPartResults
-// after two Append() operations.
-TEST_F(TestPartResultArrayTest, ContainsGivenResultsAfterTwoAppends) {
-  TestPartResultArray results;
-  results.Append(r1_);
-  results.Append(r2_);
-  EXPECT_EQ(2, results.size());
-  EXPECT_STREQ("Failure 1", results.GetTestPartResult(0).message());
-  EXPECT_STREQ("Failure 2", results.GetTestPartResult(1).message());
-}
-
-typedef TestPartResultArrayTest TestPartResultArrayDeathTest;
-
-// Tests that the program dies when GetTestPartResult() is called with
-// an invalid index.
-TEST_F(TestPartResultArrayDeathTest, DiesWhenIndexIsOutOfBound) {
-  TestPartResultArray results;
-  results.Append(r1_);
-
-  EXPECT_DEATH_IF_SUPPORTED(results.GetTestPartResult(-1), "");
-  EXPECT_DEATH_IF_SUPPORTED(results.GetTestPartResult(1), "");
-}
-
-}  // namespace
diff --git a/third_party/googletest/googletest/test/googletest-throw-on-failure-test.py b/third_party/googletest/googletest/test/googletest-throw-on-failure-test.py
deleted file mode 100755
index ea627c4..0000000
--- a/third_party/googletest/googletest/test/googletest-throw-on-failure-test.py
+++ /dev/null
@@ -1,168 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests Google Test's throw-on-failure mode with exceptions disabled.
-
-This script invokes googletest-throw-on-failure-test_ (a program written with
-Google Test) with different environments and command line flags.
-"""
-
-import os
-import gtest_test_utils
-
-
-# Constants.
-
-# The command line flag for enabling/disabling the throw-on-failure mode.
-THROW_ON_FAILURE = 'gtest_throw_on_failure'
-
-# Path to the googletest-throw-on-failure-test_ program, compiled with
-# exceptions disabled.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-throw-on-failure-test_')
-
-
-# Utilities.
-
-
-def SetEnvVar(env_var, value):
-  """Sets an environment variable to a given value; unsets it when the
-  given value is None.
-  """
-
-  env_var = env_var.upper()
-  if value is not None:
-    os.environ[env_var] = value
-  elif env_var in os.environ:
-    del os.environ[env_var]
-
-
-def Run(command):
-  """Runs a command; returns True/False if its exit code is/isn't 0."""
-
-  print('Running "%s". . .' % ' '.join(command))
-  p = gtest_test_utils.Subprocess(command)
-  return p.exited and p.exit_code == 0
-
-
-# The tests.
-class ThrowOnFailureTest(gtest_test_utils.TestCase):
-  """Tests the throw-on-failure mode."""
-
-  def RunAndVerify(self, env_var_value, flag_value, should_fail):
-    """Runs googletest-throw-on-failure-test_ and verifies that it does
-    (or does not) exit with a non-zero code.
-
-    Args:
-      env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
-                        variable; None if the variable should be unset.
-      flag_value:       value of the --gtest_break_on_failure flag;
-                        None if the flag should not be present.
-      should_fail:      True if and only if the program is expected to fail.
-    """
-
-    SetEnvVar(THROW_ON_FAILURE, env_var_value)
-
-    if env_var_value is None:
-      env_var_value_msg = ' is not set'
-    else:
-      env_var_value_msg = '=' + env_var_value
-
-    if flag_value is None:
-      flag = ''
-    elif flag_value == '0':
-      flag = '--%s=0' % THROW_ON_FAILURE
-    else:
-      flag = '--%s' % THROW_ON_FAILURE
-
-    command = [EXE_PATH]
-    if flag:
-      command.append(flag)
-
-    if should_fail:
-      should_or_not = 'should'
-    else:
-      should_or_not = 'should not'
-
-    failed = not Run(command)
-
-    SetEnvVar(THROW_ON_FAILURE, None)
-
-    msg = ('when %s%s, an assertion failure in "%s" %s cause a non-zero '
-           'exit code.' %
-           (THROW_ON_FAILURE, env_var_value_msg, ' '.join(command),
-            should_or_not))
-    self.assert_(failed == should_fail, msg)
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(env_var_value=None, flag_value=None, should_fail=False)
-
-  def testThrowOnFailureEnvVar(self):
-    """Tests using the GTEST_THROW_ON_FAILURE environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value=None,
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value=None,
-                      should_fail=True)
-
-  def testThrowOnFailureFlag(self):
-    """Tests using the --gtest_throw_on_failure flag."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='1',
-                      should_fail=True)
-
-  def testThrowOnFailureFlagOverridesEnvVar(self):
-    """Tests that --gtest_throw_on_failure overrides GTEST_THROW_ON_FAILURE."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='1',
-                      should_fail=True)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='1',
-                      should_fail=True)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-throw-on-failure-test_.cc b/third_party/googletest/googletest/test/googletest-throw-on-failure-test_.cc
deleted file mode 100644
index 83bb914..0000000
--- a/third_party/googletest/googletest/test/googletest-throw-on-failure-test_.cc
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's throw-on-failure mode with exceptions disabled.
-//
-// This program must be compiled with exceptions disabled.  It will be
-// invoked by googletest-throw-on-failure-test.py, and is expected to exit
-// with non-zero in the throw-on-failure mode or 0 otherwise.
-
-#include "gtest/gtest.h"
-
-#include <stdio.h>                      // for fflush, fprintf, NULL, etc.
-#include <stdlib.h>                     // for exit
-#include <exception>                    // for set_terminate
-
-// This terminate handler aborts the program using exit() rather than abort().
-// This avoids showing pop-ups on Windows systems and core dumps on Unix-like
-// ones.
-void TerminateHandler() {
-  fprintf(stderr, "%s\n", "Unhandled C++ exception terminating the program.");
-  fflush(nullptr);
-  exit(1);
-}
-
-int main(int argc, char** argv) {
-#if GTEST_HAS_EXCEPTIONS
-  std::set_terminate(&TerminateHandler);
-#endif
-  testing::InitGoogleTest(&argc, argv);
-
-  // We want to ensure that people can use Google Test assertions in
-  // other testing frameworks, as long as they initialize Google Test
-  // properly and set the throw-on-failure mode.  Therefore, we don't
-  // use Google Test's constructs for defining and running tests
-  // (e.g. TEST and RUN_ALL_TESTS) here.
-
-  // In the throw-on-failure mode with exceptions disabled, this
-  // assertion will cause the program to exit with a non-zero code.
-  EXPECT_EQ(2, 3);
-
-  // When not in the throw-on-failure mode, the control will reach
-  // here.
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/googletest-uninitialized-test.py b/third_party/googletest/googletest/test/googletest-uninitialized-test.py
deleted file mode 100755
index 69595a0..0000000
--- a/third_party/googletest/googletest/test/googletest-uninitialized-test.py
+++ /dev/null
@@ -1,67 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-uninitialized-test_')
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def AssertEq(expected, actual):
-  if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  # Verifies that 'command' exits with code 1.
-  p = gtest_test_utils.Subprocess(command)
-  if p.exited and p.exit_code == 0:
-    Assert('IMPORTANT NOTICE' in p.output);
-  Assert('InitGoogleTest' in p.output)
-
-
-class GTestUninitializedTest(gtest_test_utils.TestCase):
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/googletest-uninitialized-test_.cc b/third_party/googletest/googletest/test/googletest-uninitialized-test_.cc
deleted file mode 100644
index b4434d5..0000000
--- a/third_party/googletest/googletest/test/googletest-uninitialized-test_.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-TEST(DummyTest, Dummy) {
-  // This test doesn't verify anything.  We just need it to create a
-  // realistic stage for testing the behavior of Google Test when
-  // RUN_ALL_TESTS() is called without
-  // testing::InitGoogleTest() being called first.
-}
-
-int main() {
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/gtest-typed-test2_test.cc b/third_party/googletest/googletest/test/gtest-typed-test2_test.cc
deleted file mode 100644
index e83ca2e..0000000
--- a/third_party/googletest/googletest/test/gtest-typed-test2_test.cc
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include <vector>
-
-#include "test/gtest-typed-test_test.h"
-#include "gtest/gtest.h"
-
-// Tests that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// (ContainerTest is also instantiated in gtest-typed-test_test.cc.)
-INSTANTIATE_TYPED_TEST_SUITE_P(Vector, ContainerTest,
-                               testing::Types<std::vector<int> >);
diff --git a/third_party/googletest/googletest/test/gtest-typed-test_test.cc b/third_party/googletest/googletest/test/gtest-typed-test_test.cc
deleted file mode 100644
index 5fc678c..0000000
--- a/third_party/googletest/googletest/test/gtest-typed-test_test.cc
+++ /dev/null
@@ -1,437 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "test/gtest-typed-test_test.h"
-
-#include <set>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127 /* conditional expression is constant */)
-#endif  //  _MSC_VER
-
-using testing::Test;
-
-// Used for testing that SetUpTestSuite()/TearDownTestSuite(), fixture
-// ctor/dtor, and SetUp()/TearDown() work correctly in typed tests and
-// type-parameterized test.
-template <typename T>
-class CommonTest : public Test {
-  // For some technical reason, SetUpTestSuite() and TearDownTestSuite()
-  // must be public.
- public:
-  static void SetUpTestSuite() {
-    shared_ = new T(5);
-  }
-
-  static void TearDownTestSuite() {
-    delete shared_;
-    shared_ = nullptr;
-  }
-
-  // This 'protected:' is optional.  There's no harm in making all
-  // members of this fixture class template public.
- protected:
-  // We used to use std::list here, but switched to std::vector since
-  // MSVC's <list> doesn't compile cleanly with /W4.
-  typedef std::vector<T> Vector;
-  typedef std::set<int> IntSet;
-
-  CommonTest() : value_(1) {}
-
-  ~CommonTest() override { EXPECT_EQ(3, value_); }
-
-  void SetUp() override {
-    EXPECT_EQ(1, value_);
-    value_++;
-  }
-
-  void TearDown() override {
-    EXPECT_EQ(2, value_);
-    value_++;
-  }
-
-  T value_;
-  static T* shared_;
-};
-
-template <typename T>
-T* CommonTest<T>::shared_ = nullptr;
-
-using testing::Types;
-
-// Tests that SetUpTestSuite()/TearDownTestSuite(), fixture ctor/dtor,
-// and SetUp()/TearDown() work correctly in typed tests
-
-typedef Types<char, int> TwoTypes;
-TYPED_TEST_SUITE(CommonTest, TwoTypes);
-
-TYPED_TEST(CommonTest, ValuesAreCorrect) {
-  // Static members of the fixture class template can be visited via
-  // the TestFixture:: prefix.
-  EXPECT_EQ(5, *TestFixture::shared_);
-
-  // Typedefs in the fixture class template can be visited via the
-  // "typename TestFixture::" prefix.
-  typename TestFixture::Vector empty;
-  EXPECT_EQ(0U, empty.size());
-
-  typename TestFixture::IntSet empty2;
-  EXPECT_EQ(0U, empty2.size());
-
-  // Non-static members of the fixture class must be visited via
-  // 'this', as required by C++ for class templates.
-  EXPECT_EQ(2, this->value_);
-}
-
-// The second test makes sure shared_ is not deleted after the first
-// test.
-TYPED_TEST(CommonTest, ValuesAreStillCorrect) {
-  // Static members of the fixture class template can also be visited
-  // via 'this'.
-  ASSERT_TRUE(this->shared_ != nullptr);
-  EXPECT_EQ(5, *this->shared_);
-
-  // TypeParam can be used to refer to the type parameter.
-  EXPECT_EQ(static_cast<TypeParam>(2), this->value_);
-}
-
-// Tests that multiple TYPED_TEST_SUITE's can be defined in the same
-// translation unit.
-
-template <typename T>
-class TypedTest1 : public Test {
-};
-
-// Verifies that the second argument of TYPED_TEST_SUITE can be a
-// single type.
-TYPED_TEST_SUITE(TypedTest1, int);
-TYPED_TEST(TypedTest1, A) {}
-
-template <typename T>
-class TypedTest2 : public Test {
-};
-
-// Verifies that the second argument of TYPED_TEST_SUITE can be a
-// Types<...> type list.
-TYPED_TEST_SUITE(TypedTest2, Types<int>);
-
-// This also verifies that tests from different typed test cases can
-// share the same name.
-TYPED_TEST(TypedTest2, A) {}
-
-// Tests that a typed test case can be defined in a namespace.
-
-namespace library1 {
-
-template <typename T>
-class NumericTest : public Test {
-};
-
-typedef Types<int, long> NumericTypes;
-TYPED_TEST_SUITE(NumericTest, NumericTypes);
-
-TYPED_TEST(NumericTest, DefaultIsZero) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-}  // namespace library1
-
-// Tests that custom names work.
-template <typename T>
-class TypedTestWithNames : public Test {};
-
-class TypedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value) {
-      return std::string("char") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, int>::value) {
-      return std::string("int") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-TYPED_TEST_SUITE(TypedTestWithNames, TwoTypes, TypedTestNames);
-
-TYPED_TEST(TypedTestWithNames, TestSuiteName) {
-  if (std::is_same<TypeParam, char>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_suite_name(),
-                 "TypedTestWithNames/char0");
-  }
-  if (std::is_same<TypeParam, int>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_suite_name(),
-                 "TypedTestWithNames/int1");
-  }
-}
-
-using testing::Types;
-using testing::internal::TypedTestSuitePState;
-
-// Tests TypedTestSuitePState.
-
-class TypedTestSuitePStateTest : public Test {
- protected:
-  void SetUp() override {
-    state_.AddTestName("foo.cc", 0, "FooTest", "A");
-    state_.AddTestName("foo.cc", 0, "FooTest", "B");
-    state_.AddTestName("foo.cc", 0, "FooTest", "C");
-  }
-
-  TypedTestSuitePState state_;
-};
-
-TEST_F(TypedTestSuitePStateTest, SucceedsForMatchingList) {
-  const char* tests = "A, B, C";
-  EXPECT_EQ(tests,
-            state_.VerifyRegisteredTestNames("Suite", "foo.cc", 1, tests));
-}
-
-// Makes sure that the order of the tests and spaces around the names
-// don't matter.
-TEST_F(TypedTestSuitePStateTest, IgnoresOrderAndSpaces) {
-  const char* tests = "A,C,   B";
-  EXPECT_EQ(tests,
-            state_.VerifyRegisteredTestNames("Suite", "foo.cc", 1, tests));
-}
-
-using TypedTestSuitePStateDeathTest = TypedTestSuitePStateTest;
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsDuplicates) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("Suite", "foo.cc", 1, "A, B, A, C"),
-      "foo\\.cc.1.?: Test A is listed more than once\\.");
-}
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsExtraTest) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("Suite", "foo.cc", 1, "A, B, C, D"),
-      "foo\\.cc.1.?: No test named D can be found in this test suite\\.");
-}
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsMissedTest) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("Suite", "foo.cc", 1, "A, C"),
-      "foo\\.cc.1.?: You forgot to list test B\\.");
-}
-
-// Tests that defining a test for a parameterized test case generates
-// a run-time error if the test case has been registered.
-TEST_F(TypedTestSuitePStateDeathTest, DetectsTestAfterRegistration) {
-  state_.VerifyRegisteredTestNames("Suite", "foo.cc", 1, "A, B, C");
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.AddTestName("foo.cc", 2, "FooTest", "D"),
-      "foo\\.cc.2.?: Test D must be defined before REGISTER_TYPED_TEST_SUITE_P"
-      "\\(FooTest, \\.\\.\\.\\)\\.");
-}
-
-// Tests that SetUpTestSuite()/TearDownTestSuite(), fixture ctor/dtor,
-// and SetUp()/TearDown() work correctly in type-parameterized tests.
-
-template <typename T>
-class DerivedTest : public CommonTest<T> {
-};
-
-TYPED_TEST_SUITE_P(DerivedTest);
-
-TYPED_TEST_P(DerivedTest, ValuesAreCorrect) {
-  // Static members of the fixture class template can be visited via
-  // the TestFixture:: prefix.
-  EXPECT_EQ(5, *TestFixture::shared_);
-
-  // Non-static members of the fixture class must be visited via
-  // 'this', as required by C++ for class templates.
-  EXPECT_EQ(2, this->value_);
-}
-
-// The second test makes sure shared_ is not deleted after the first
-// test.
-TYPED_TEST_P(DerivedTest, ValuesAreStillCorrect) {
-  // Static members of the fixture class template can also be visited
-  // via 'this'.
-  ASSERT_TRUE(this->shared_ != nullptr);
-  EXPECT_EQ(5, *this->shared_);
-  EXPECT_EQ(2, this->value_);
-}
-
-REGISTER_TYPED_TEST_SUITE_P(DerivedTest,
-                           ValuesAreCorrect, ValuesAreStillCorrect);
-
-typedef Types<short, long> MyTwoTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, DerivedTest, MyTwoTypes);
-
-// Tests that custom names work with type parametrized tests. We reuse the
-// TwoTypes from above here.
-template <typename T>
-class TypeParametrizedTestWithNames : public Test {};
-
-TYPED_TEST_SUITE_P(TypeParametrizedTestWithNames);
-
-TYPED_TEST_P(TypeParametrizedTestWithNames, TestSuiteName) {
-  if (std::is_same<TypeParam, char>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_suite_name(),
-                 "CustomName/TypeParametrizedTestWithNames/parChar0");
-  }
-  if (std::is_same<TypeParam, int>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_suite_name(),
-                 "CustomName/TypeParametrizedTestWithNames/parInt1");
-  }
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypeParametrizedTestWithNames, TestSuiteName);
-
-class TypeParametrizedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value) {
-      return std::string("parChar") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, int>::value) {
-      return std::string("parInt") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-INSTANTIATE_TYPED_TEST_SUITE_P(CustomName, TypeParametrizedTestWithNames,
-                              TwoTypes, TypeParametrizedTestNames);
-
-// Tests that multiple TYPED_TEST_SUITE_P's can be defined in the same
-// translation unit.
-
-template <typename T>
-class TypedTestP1 : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP1);
-
-// For testing that the code between TYPED_TEST_SUITE_P() and
-// TYPED_TEST_P() is not enclosed in a namespace.
-using IntAfterTypedTestSuiteP = int;
-
-TYPED_TEST_P(TypedTestP1, A) {}
-TYPED_TEST_P(TypedTestP1, B) {}
-
-// For testing that the code between TYPED_TEST_P() and
-// REGISTER_TYPED_TEST_SUITE_P() is not enclosed in a namespace.
-using IntBeforeRegisterTypedTestSuiteP = int;
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP1, A, B);
-
-template <typename T>
-class TypedTestP2 : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP2);
-
-// This also verifies that tests from different type-parameterized
-// test cases can share the same name.
-TYPED_TEST_P(TypedTestP2, A) {}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP2, A);
-
-// Verifies that the code between TYPED_TEST_SUITE_P() and
-// REGISTER_TYPED_TEST_SUITE_P() is not enclosed in a namespace.
-IntAfterTypedTestSuiteP after = 0;
-IntBeforeRegisterTypedTestSuiteP before = 0;
-
-// Verifies that the last argument of INSTANTIATE_TYPED_TEST_SUITE_P()
-// can be either a single type or a Types<...> type list.
-INSTANTIATE_TYPED_TEST_SUITE_P(Int, TypedTestP1, int);
-INSTANTIATE_TYPED_TEST_SUITE_P(Int, TypedTestP2, Types<int>);
-
-// Tests that the same type-parameterized test case can be
-// instantiated more than once in the same translation unit.
-INSTANTIATE_TYPED_TEST_SUITE_P(Double, TypedTestP2, Types<double>);
-
-// Tests that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// (ContainerTest is also instantiated in gtest-typed-test_test.cc.)
-typedef Types<std::vector<double>, std::set<char> > MyContainers;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, ContainerTest, MyContainers);
-
-// Tests that a type-parameterized test case can be defined and
-// instantiated in a namespace.
-
-namespace library2 {
-
-template <typename T>
-class NumericTest : public Test {
-};
-
-TYPED_TEST_SUITE_P(NumericTest);
-
-TYPED_TEST_P(NumericTest, DefaultIsZero) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-TYPED_TEST_P(NumericTest, ZeroIsLessThanOne) {
-  EXPECT_LT(TypeParam(0), TypeParam(1));
-}
-
-REGISTER_TYPED_TEST_SUITE_P(NumericTest,
-                           DefaultIsZero, ZeroIsLessThanOne);
-typedef Types<int, double> NumericTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, NumericTest, NumericTypes);
-
-static const char* GetTestName() {
-  return testing::UnitTest::GetInstance()->current_test_info()->name();
-}
-// Test the stripping of space from test names
-template <typename T> class TrimmedTest : public Test { };
-TYPED_TEST_SUITE_P(TrimmedTest);
-TYPED_TEST_P(TrimmedTest, Test1) { EXPECT_STREQ("Test1", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test2) { EXPECT_STREQ("Test2", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test3) { EXPECT_STREQ("Test3", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test4) { EXPECT_STREQ("Test4", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test5) { EXPECT_STREQ("Test5", GetTestName()); }
-REGISTER_TYPED_TEST_SUITE_P(
-    TrimmedTest,
-    Test1, Test2,Test3 , Test4 ,Test5 );  // NOLINT
-template <typename T1, typename T2> struct MyPair {};
-// Be sure to try a type with a comma in its name just in case it matters.
-typedef Types<int, double, MyPair<int, int> > TrimTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TrimmedTest, TrimTypes);
-
-}  // namespace library2
-
diff --git a/third_party/googletest/googletest/test/gtest-typed-test_test.h b/third_party/googletest/googletest/test/gtest-typed-test_test.h
deleted file mode 100644
index 8ce559c..0000000
--- a/third_party/googletest/googletest/test/gtest-typed-test_test.h
+++ /dev/null
@@ -1,60 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef GOOGLETEST_TEST_GTEST_TYPED_TEST_TEST_H_
-#define GOOGLETEST_TEST_GTEST_TYPED_TEST_TEST_H_
-
-#include "gtest/gtest.h"
-
-using testing::Test;
-
-// For testing that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// ContainerTest will be instantiated in both gtest-typed-test_test.cc
-// and gtest-typed-test2_test.cc.
-
-template <typename T>
-class ContainerTest : public Test {
-};
-
-TYPED_TEST_SUITE_P(ContainerTest);
-
-TYPED_TEST_P(ContainerTest, CanBeDefaultConstructed) {
-  TypeParam container;
-}
-
-TYPED_TEST_P(ContainerTest, InitialSizeIsZero) {
-  TypeParam container;
-  EXPECT_EQ(0U, container.size());
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ContainerTest,
-                            CanBeDefaultConstructed, InitialSizeIsZero);
-
-#endif  // GOOGLETEST_TEST_GTEST_TYPED_TEST_TEST_H_
diff --git a/third_party/googletest/googletest/test/gtest-unittest-api_test.cc b/third_party/googletest/googletest/test/gtest-unittest-api_test.cc
deleted file mode 100644
index 8ef5058..0000000
--- a/third_party/googletest/googletest/test/gtest-unittest-api_test.cc
+++ /dev/null
@@ -1,328 +0,0 @@
-// Copyright 2009 Google Inc.  All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file contains tests verifying correctness of data provided via
-// UnitTest's public methods.
-
-#include "gtest/gtest.h"
-
-#include <string.h>  // For strcmp.
-#include <algorithm>
-
-using ::testing::InitGoogleTest;
-
-namespace testing {
-namespace internal {
-
-template <typename T>
-struct LessByName {
-  bool operator()(const T* a, const T* b) {
-    return strcmp(a->name(), b->name()) < 0;
-  }
-};
-
-class UnitTestHelper {
- public:
-  // Returns the array of pointers to all test suites sorted by the test suite
-  // name.  The caller is responsible for deleting the array.
-  static TestSuite const** GetSortedTestSuites() {
-    UnitTest& unit_test = *UnitTest::GetInstance();
-    auto const** const test_suites = new const TestSuite*[static_cast<size_t>(
-      unit_test.total_test_suite_count())];
-
-    for (int i = 0; i < unit_test.total_test_suite_count(); ++i)
-      test_suites[i] = unit_test.GetTestSuite(i);
-
-    std::sort(test_suites,
-              test_suites + unit_test.total_test_suite_count(),
-              LessByName<TestSuite>());
-    return test_suites;
-  }
-
-  // Returns the test suite by its name.  The caller doesn't own the returned
-  // pointer.
-  static const TestSuite* FindTestSuite(const char* name) {
-    UnitTest& unit_test = *UnitTest::GetInstance();
-    for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-      const TestSuite* test_suite = unit_test.GetTestSuite(i);
-      if (0 == strcmp(test_suite->name(), name))
-        return test_suite;
-    }
-    return nullptr;
-  }
-
-  // Returns the array of pointers to all tests in a particular test suite
-  // sorted by the test name.  The caller is responsible for deleting the
-  // array.
-  static TestInfo const** GetSortedTests(const TestSuite* test_suite) {
-    TestInfo const** const tests = new const TestInfo*[static_cast<size_t>(
-      test_suite->total_test_count())];
-
-    for (int i = 0; i < test_suite->total_test_count(); ++i)
-      tests[i] = test_suite->GetTestInfo(i);
-
-    std::sort(tests, tests + test_suite->total_test_count(),
-              LessByName<TestInfo>());
-    return tests;
-  }
-};
-
-template <typename T> class TestSuiteWithCommentTest : public Test {};
-TYPED_TEST_SUITE(TestSuiteWithCommentTest, Types<int>);
-TYPED_TEST(TestSuiteWithCommentTest, Dummy) {}
-
-const int kTypedTestSuites = 1;
-const int kTypedTests = 1;
-
-// We can only test the accessors that do not change value while tests run.
-// Since tests can be run in any order, the values the accessors that track
-// test execution (such as failed_test_count) can not be predicted.
-TEST(ApiTest, UnitTestImmutableAccessorsWork) {
-  UnitTest* unit_test = UnitTest::GetInstance();
-
-  ASSERT_EQ(2 + kTypedTestSuites, unit_test->total_test_suite_count());
-  EXPECT_EQ(1 + kTypedTestSuites, unit_test->test_suite_to_run_count());
-  EXPECT_EQ(2, unit_test->disabled_test_count());
-  EXPECT_EQ(5 + kTypedTests, unit_test->total_test_count());
-  EXPECT_EQ(3 + kTypedTests, unit_test->test_to_run_count());
-
-  const TestSuite** const test_suites = UnitTestHelper::GetSortedTestSuites();
-
-  EXPECT_STREQ("ApiTest", test_suites[0]->name());
-  EXPECT_STREQ("DISABLED_Test", test_suites[1]->name());
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suites[2]->name());
-
-  delete[] test_suites;
-
-  // The following lines initiate actions to verify certain methods in
-  // FinalSuccessChecker::TearDown.
-
-  // Records a test property to verify TestResult::GetTestProperty().
-  RecordProperty("key", "value");
-}
-
-AssertionResult IsNull(const char* str) {
-  if (str != nullptr) {
-    return testing::AssertionFailure() << "argument is " << str;
-  }
-  return AssertionSuccess();
-}
-
-TEST(ApiTest, TestSuiteImmutableAccessorsWork) {
-  const TestSuite* test_suite = UnitTestHelper::FindTestSuite("ApiTest");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("ApiTest", test_suite->name());
-  EXPECT_TRUE(IsNull(test_suite->type_param()));
-  EXPECT_TRUE(test_suite->should_run());
-  EXPECT_EQ(1, test_suite->disabled_test_count());
-  EXPECT_EQ(3, test_suite->test_to_run_count());
-  ASSERT_EQ(4, test_suite->total_test_count());
-
-  const TestInfo** tests = UnitTestHelper::GetSortedTests(test_suite);
-
-  EXPECT_STREQ("DISABLED_Dummy1", tests[0]->name());
-  EXPECT_STREQ("ApiTest", tests[0]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[0]->value_param()));
-  EXPECT_TRUE(IsNull(tests[0]->type_param()));
-  EXPECT_FALSE(tests[0]->should_run());
-
-  EXPECT_STREQ("TestSuiteDisabledAccessorsWork", tests[1]->name());
-  EXPECT_STREQ("ApiTest", tests[1]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[1]->value_param()));
-  EXPECT_TRUE(IsNull(tests[1]->type_param()));
-  EXPECT_TRUE(tests[1]->should_run());
-
-  EXPECT_STREQ("TestSuiteImmutableAccessorsWork", tests[2]->name());
-  EXPECT_STREQ("ApiTest", tests[2]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[2]->value_param()));
-  EXPECT_TRUE(IsNull(tests[2]->type_param()));
-  EXPECT_TRUE(tests[2]->should_run());
-
-  EXPECT_STREQ("UnitTestImmutableAccessorsWork", tests[3]->name());
-  EXPECT_STREQ("ApiTest", tests[3]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[3]->value_param()));
-  EXPECT_TRUE(IsNull(tests[3]->type_param()));
-  EXPECT_TRUE(tests[3]->should_run());
-
-  delete[] tests;
-  tests = nullptr;
-
-  test_suite = UnitTestHelper::FindTestSuite("TestSuiteWithCommentTest/0");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suite->name());
-  EXPECT_STREQ(GetTypeName<Types<int>>().c_str(), test_suite->type_param());
-  EXPECT_TRUE(test_suite->should_run());
-  EXPECT_EQ(0, test_suite->disabled_test_count());
-  EXPECT_EQ(1, test_suite->test_to_run_count());
-  ASSERT_EQ(1, test_suite->total_test_count());
-
-  tests = UnitTestHelper::GetSortedTests(test_suite);
-
-  EXPECT_STREQ("Dummy", tests[0]->name());
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", tests[0]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[0]->value_param()));
-  EXPECT_STREQ(GetTypeName<Types<int>>().c_str(), tests[0]->type_param());
-  EXPECT_TRUE(tests[0]->should_run());
-
-  delete[] tests;
-}
-
-TEST(ApiTest, TestSuiteDisabledAccessorsWork) {
-  const TestSuite* test_suite = UnitTestHelper::FindTestSuite("DISABLED_Test");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("DISABLED_Test", test_suite->name());
-  EXPECT_TRUE(IsNull(test_suite->type_param()));
-  EXPECT_FALSE(test_suite->should_run());
-  EXPECT_EQ(1, test_suite->disabled_test_count());
-  EXPECT_EQ(0, test_suite->test_to_run_count());
-  ASSERT_EQ(1, test_suite->total_test_count());
-
-  const TestInfo* const test_info = test_suite->GetTestInfo(0);
-  EXPECT_STREQ("Dummy2", test_info->name());
-  EXPECT_STREQ("DISABLED_Test", test_info->test_suite_name());
-  EXPECT_TRUE(IsNull(test_info->value_param()));
-  EXPECT_TRUE(IsNull(test_info->type_param()));
-  EXPECT_FALSE(test_info->should_run());
-}
-
-// These two tests are here to provide support for testing
-// test_suite_to_run_count, disabled_test_count, and test_to_run_count.
-TEST(ApiTest, DISABLED_Dummy1) {}
-TEST(DISABLED_Test, Dummy2) {}
-
-class FinalSuccessChecker : public Environment {
- protected:
-  void TearDown() override {
-    UnitTest* unit_test = UnitTest::GetInstance();
-
-    EXPECT_EQ(1 + kTypedTestSuites, unit_test->successful_test_suite_count());
-    EXPECT_EQ(3 + kTypedTests, unit_test->successful_test_count());
-    EXPECT_EQ(0, unit_test->failed_test_suite_count());
-    EXPECT_EQ(0, unit_test->failed_test_count());
-    EXPECT_TRUE(unit_test->Passed());
-    EXPECT_FALSE(unit_test->Failed());
-    ASSERT_EQ(2 + kTypedTestSuites, unit_test->total_test_suite_count());
-
-    const TestSuite** const test_suites = UnitTestHelper::GetSortedTestSuites();
-
-    EXPECT_STREQ("ApiTest", test_suites[0]->name());
-    EXPECT_TRUE(IsNull(test_suites[0]->type_param()));
-    EXPECT_TRUE(test_suites[0]->should_run());
-    EXPECT_EQ(1, test_suites[0]->disabled_test_count());
-    ASSERT_EQ(4, test_suites[0]->total_test_count());
-    EXPECT_EQ(3, test_suites[0]->successful_test_count());
-    EXPECT_EQ(0, test_suites[0]->failed_test_count());
-    EXPECT_TRUE(test_suites[0]->Passed());
-    EXPECT_FALSE(test_suites[0]->Failed());
-
-    EXPECT_STREQ("DISABLED_Test", test_suites[1]->name());
-    EXPECT_TRUE(IsNull(test_suites[1]->type_param()));
-    EXPECT_FALSE(test_suites[1]->should_run());
-    EXPECT_EQ(1, test_suites[1]->disabled_test_count());
-    ASSERT_EQ(1, test_suites[1]->total_test_count());
-    EXPECT_EQ(0, test_suites[1]->successful_test_count());
-    EXPECT_EQ(0, test_suites[1]->failed_test_count());
-
-    EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suites[2]->name());
-    EXPECT_STREQ(GetTypeName<Types<int>>().c_str(),
-                 test_suites[2]->type_param());
-    EXPECT_TRUE(test_suites[2]->should_run());
-    EXPECT_EQ(0, test_suites[2]->disabled_test_count());
-    ASSERT_EQ(1, test_suites[2]->total_test_count());
-    EXPECT_EQ(1, test_suites[2]->successful_test_count());
-    EXPECT_EQ(0, test_suites[2]->failed_test_count());
-    EXPECT_TRUE(test_suites[2]->Passed());
-    EXPECT_FALSE(test_suites[2]->Failed());
-
-    const TestSuite* test_suite = UnitTestHelper::FindTestSuite("ApiTest");
-    const TestInfo** tests = UnitTestHelper::GetSortedTests(test_suite);
-    EXPECT_STREQ("DISABLED_Dummy1", tests[0]->name());
-    EXPECT_STREQ("ApiTest", tests[0]->test_suite_name());
-    EXPECT_FALSE(tests[0]->should_run());
-
-    EXPECT_STREQ("TestSuiteDisabledAccessorsWork", tests[1]->name());
-    EXPECT_STREQ("ApiTest", tests[1]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[1]->value_param()));
-    EXPECT_TRUE(IsNull(tests[1]->type_param()));
-    EXPECT_TRUE(tests[1]->should_run());
-    EXPECT_TRUE(tests[1]->result()->Passed());
-    EXPECT_EQ(0, tests[1]->result()->test_property_count());
-
-    EXPECT_STREQ("TestSuiteImmutableAccessorsWork", tests[2]->name());
-    EXPECT_STREQ("ApiTest", tests[2]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[2]->value_param()));
-    EXPECT_TRUE(IsNull(tests[2]->type_param()));
-    EXPECT_TRUE(tests[2]->should_run());
-    EXPECT_TRUE(tests[2]->result()->Passed());
-    EXPECT_EQ(0, tests[2]->result()->test_property_count());
-
-    EXPECT_STREQ("UnitTestImmutableAccessorsWork", tests[3]->name());
-    EXPECT_STREQ("ApiTest", tests[3]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[3]->value_param()));
-    EXPECT_TRUE(IsNull(tests[3]->type_param()));
-    EXPECT_TRUE(tests[3]->should_run());
-    EXPECT_TRUE(tests[3]->result()->Passed());
-    EXPECT_EQ(1, tests[3]->result()->test_property_count());
-    const TestProperty& property = tests[3]->result()->GetTestProperty(0);
-    EXPECT_STREQ("key", property.key());
-    EXPECT_STREQ("value", property.value());
-
-    delete[] tests;
-
-    test_suite = UnitTestHelper::FindTestSuite("TestSuiteWithCommentTest/0");
-    tests = UnitTestHelper::GetSortedTests(test_suite);
-
-    EXPECT_STREQ("Dummy", tests[0]->name());
-    EXPECT_STREQ("TestSuiteWithCommentTest/0", tests[0]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[0]->value_param()));
-    EXPECT_STREQ(GetTypeName<Types<int>>().c_str(), tests[0]->type_param());
-    EXPECT_TRUE(tests[0]->should_run());
-    EXPECT_TRUE(tests[0]->result()->Passed());
-    EXPECT_EQ(0, tests[0]->result()->test_property_count());
-
-    delete[] tests;
-    delete[] test_suites;
-  }
-};
-
-}  // namespace internal
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  AddGlobalTestEnvironment(new testing::internal::FinalSuccessChecker());
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/gtest_all_test.cc b/third_party/googletest/googletest/test/gtest_all_test.cc
deleted file mode 100644
index 615b29b..0000000
--- a/third_party/googletest/googletest/test/gtest_all_test.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build most of Google Test's own tests
-// by compiling a single file.  This file serves this purpose.
-#include "test/googletest-filepath-test.cc"
-#include "test/googletest-message-test.cc"
-#include "test/googletest-options-test.cc"
-#include "test/googletest-port-test.cc"
-#include "test/googletest-test-part-test.cc"
-#include "test/gtest-typed-test2_test.cc"
-#include "test/gtest-typed-test_test.cc"
-#include "test/gtest_pred_impl_unittest.cc"
-#include "test/gtest_prod_test.cc"
-#include "test/gtest_skip_test.cc"
-#include "test/gtest_unittest.cc"
-#include "test/production.cc"
diff --git a/third_party/googletest/googletest/test/gtest_assert_by_exception_test.cc b/third_party/googletest/googletest/test/gtest_assert_by_exception_test.cc
deleted file mode 100644
index ada4cb3..0000000
--- a/third_party/googletest/googletest/test/gtest_assert_by_exception_test.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's assert-by-exception mode with exceptions enabled.
-
-#include "gtest/gtest.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdexcept>
-
-class ThrowListener : public testing::EmptyTestEventListener {
-  void OnTestPartResult(const testing::TestPartResult& result) override {
-    if (result.type() == testing::TestPartResult::kFatalFailure) {
-      throw testing::AssertionException(result);
-    }
-  }
-};
-
-// Prints the given failure message and exits the program with
-// non-zero.  We use this instead of a Google Test assertion to
-// indicate a failure, as the latter is been tested and cannot be
-// relied on.
-void Fail(const char* msg) {
-  printf("FAILURE: %s\n", msg);
-  fflush(stdout);
-  exit(1);
-}
-
-static void AssertFalse() {
-  ASSERT_EQ(2, 3) << "Expected failure";
-}
-
-// Tests that an assertion failure throws a subclass of
-// std::runtime_error.
-TEST(Test, Test) {
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 3);
-  } catch(...) {
-    Fail("A successful assertion wrongfully threw.");
-  }
-
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 4);
-  } catch(...) {
-    Fail("A failed non-fatal assertion wrongfully threw.");
-  }
-
-  // A failed assertion should throw.
-  try {
-    AssertFalse();
-  } catch(const testing::AssertionException& e) {
-    if (strstr(e.what(), "Expected failure") != nullptr) throw;
-
-    printf("%s",
-           "A failed assertion did throw an exception of the right type, "
-           "but the message is incorrect.  Instead of containing \"Expected "
-           "failure\", it is:\n");
-    Fail(e.what());
-  } catch(...) {
-    Fail("A failed assertion threw the wrong type of exception.");
-  }
-  Fail("A failed assertion should've thrown but didn't.");
-}
-
-int kTestForContinuingTest = 0;
-
-TEST(Test, Test2) {
-  kTestForContinuingTest = 1;
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
-
-  int result = RUN_ALL_TESTS();
-  if (result == 0) {
-    printf("RUN_ALL_TESTS returned %d\n", result);
-    Fail("Expected failure instead.");
-  }
-
-  if (kTestForContinuingTest == 0) {
-    Fail("Should have continued with other tests, but did not.");
-  }
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/gtest_environment_test.cc b/third_party/googletest/googletest/test/gtest_environment_test.cc
deleted file mode 100644
index 064bfc5..0000000
--- a/third_party/googletest/googletest/test/gtest_environment_test.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests using global test environments.
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-GTEST_DECLARE_string_(filter);
-}
-
-namespace {
-
-enum FailureType {
-  NO_FAILURE, NON_FATAL_FAILURE, FATAL_FAILURE
-};
-
-// For testing using global test environments.
-class MyEnvironment : public testing::Environment {
- public:
-  MyEnvironment() { Reset(); }
-
-  // Depending on the value of failure_in_set_up_, SetUp() will
-  // generate a non-fatal failure, generate a fatal failure, or
-  // succeed.
-  void SetUp() override {
-    set_up_was_run_ = true;
-
-    switch (failure_in_set_up_) {
-      case NON_FATAL_FAILURE:
-        ADD_FAILURE() << "Expected non-fatal failure in global set-up.";
-        break;
-      case FATAL_FAILURE:
-        FAIL() << "Expected fatal failure in global set-up.";
-        break;
-      default:
-        break;
-    }
-  }
-
-  // Generates a non-fatal failure.
-  void TearDown() override {
-    tear_down_was_run_ = true;
-    ADD_FAILURE() << "Expected non-fatal failure in global tear-down.";
-  }
-
-  // Resets the state of the environment s.t. it can be reused.
-  void Reset() {
-    failure_in_set_up_ = NO_FAILURE;
-    set_up_was_run_ = false;
-    tear_down_was_run_ = false;
-  }
-
-  // We call this function to set the type of failure SetUp() should
-  // generate.
-  void set_failure_in_set_up(FailureType type) {
-    failure_in_set_up_ = type;
-  }
-
-  // Was SetUp() run?
-  bool set_up_was_run() const { return set_up_was_run_; }
-
-  // Was TearDown() run?
-  bool tear_down_was_run() const { return tear_down_was_run_; }
-
- private:
-  FailureType failure_in_set_up_;
-  bool set_up_was_run_;
-  bool tear_down_was_run_;
-};
-
-// Was the TEST run?
-bool test_was_run;
-
-// The sole purpose of this TEST is to enable us to check whether it
-// was run.
-TEST(FooTest, Bar) {
-  test_was_run = true;
-}
-
-// Prints the message and aborts the program if condition is false.
-void Check(bool condition, const char* msg) {
-  if (!condition) {
-    printf("FAILED: %s\n", msg);
-    testing::internal::posix::Abort();
-  }
-}
-
-// Runs the tests.  Return true if and only if successful.
-//
-// The 'failure' parameter specifies the type of failure that should
-// be generated by the global set-up.
-int RunAllTests(MyEnvironment* env, FailureType failure) {
-  env->Reset();
-  env->set_failure_in_set_up(failure);
-  test_was_run = false;
-  testing::internal::GetUnitTestImpl()->ClearAdHocTestResult();
-  return RUN_ALL_TESTS();
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // Registers a global test environment, and verifies that the
-  // registration function returns its argument.
-  MyEnvironment* const env = new MyEnvironment;
-  Check(testing::AddGlobalTestEnvironment(env) == env,
-        "AddGlobalTestEnvironment() should return its argument.");
-
-  // Verifies that RUN_ALL_TESTS() runs the tests when the global
-  // set-up is successful.
-  Check(RunAllTests(env, NO_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as the global tear-down "
-        "should generate a failure.");
-  Check(test_was_run,
-        "The tests should run, as the global set-up should generate no "
-        "failure");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() runs the tests when the global
-  // set-up generates no fatal failure.
-  Check(RunAllTests(env, NON_FATAL_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as both the global set-up "
-        "and the global tear-down should generate a non-fatal failure.");
-  Check(test_was_run,
-        "The tests should run, as the global set-up should generate no "
-        "fatal failure.");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() runs no test when the global set-up
-  // generates a fatal failure.
-  Check(RunAllTests(env, FATAL_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as the global set-up "
-        "should generate a fatal failure.");
-  Check(!test_was_run,
-        "The tests should not run, as the global set-up should generate "
-        "a fatal failure.");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() doesn't do global set-up or
-  // tear-down when there is no test to run.
-  testing::GTEST_FLAG(filter) = "-*";
-  Check(RunAllTests(env, NO_FAILURE) == 0,
-        "RUN_ALL_TESTS() should return zero, as there is no test to run.");
-  Check(!env->set_up_was_run(),
-        "The global set-up should not run, as there is no test to run.");
-  Check(!env->tear_down_was_run(),
-        "The global tear-down should not run, "
-        "as the global set-up was not run.");
-
-  printf("PASS\n");
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/gtest_help_test.py b/third_party/googletest/googletest/test/gtest_help_test.py
deleted file mode 100755
index 8d953bb..0000000
--- a/third_party/googletest/googletest/test/gtest_help_test.py
+++ /dev/null
@@ -1,172 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests the --help flag of Google C++ Testing and Mocking Framework.
-
-SYNOPSIS
-       gtest_help_test.py --build_dir=BUILD/DIR
-         # where BUILD/DIR contains the built gtest_help_test_ file.
-       gtest_help_test.py
-"""
-
-import os
-import re
-import gtest_test_utils
-
-
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-IS_GNUKFREEBSD = os.name == 'posix' and os.uname()[0] == 'GNU/kFreeBSD'
-IS_WINDOWS = os.name == 'nt'
-
-PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_help_test_')
-FLAG_PREFIX = '--gtest_'
-DEATH_TEST_STYLE_FLAG = FLAG_PREFIX + 'death_test_style'
-STREAM_RESULT_TO_FLAG = FLAG_PREFIX + 'stream_result_to'
-UNKNOWN_FLAG = FLAG_PREFIX + 'unknown_flag_for_testing'
-LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
-INCORRECT_FLAG_VARIANTS = [re.sub('^--', '-', LIST_TESTS_FLAG),
-                           re.sub('^--', '/', LIST_TESTS_FLAG),
-                           re.sub('_', '-', LIST_TESTS_FLAG)]
-INTERNAL_FLAG_FOR_TESTING = FLAG_PREFIX + 'internal_flag_for_testing'
-
-SUPPORTS_DEATH_TESTS = "DeathTest" in gtest_test_utils.Subprocess(
-    [PROGRAM_PATH, LIST_TESTS_FLAG]).output
-
-# The help message must match this regex.
-HELP_REGEX = re.compile(
-    FLAG_PREFIX + r'list_tests.*' +
-    FLAG_PREFIX + r'filter=.*' +
-    FLAG_PREFIX + r'also_run_disabled_tests.*' +
-    FLAG_PREFIX + r'repeat=.*' +
-    FLAG_PREFIX + r'shuffle.*' +
-    FLAG_PREFIX + r'random_seed=.*' +
-    FLAG_PREFIX + r'color=.*' +
-    FLAG_PREFIX + r'brief.*' +
-    FLAG_PREFIX + r'print_time.*' +
-    FLAG_PREFIX + r'output=.*' +
-    FLAG_PREFIX + r'break_on_failure.*' +
-    FLAG_PREFIX + r'throw_on_failure.*' +
-    FLAG_PREFIX + r'catch_exceptions=0.*',
-    re.DOTALL)
-
-
-def RunWithFlag(flag):
-  """Runs gtest_help_test_ with the given flag.
-
-  Returns:
-    the exit code and the text output as a tuple.
-  Args:
-    flag: the command-line flag to pass to gtest_help_test_, or None.
-  """
-
-  if flag is None:
-    command = [PROGRAM_PATH]
-  else:
-    command = [PROGRAM_PATH, flag]
-  child = gtest_test_utils.Subprocess(command)
-  return child.exit_code, child.output
-
-
-class GTestHelpTest(gtest_test_utils.TestCase):
-  """Tests the --help flag and its equivalent forms."""
-
-  def TestHelpFlag(self, flag):
-    """Verifies correct behavior when help flag is specified.
-
-    The right message must be printed and the tests must
-    skipped when the given flag is specified.
-
-    Args:
-      flag:  A flag to pass to the binary or None.
-    """
-
-    exit_code, output = RunWithFlag(flag)
-    self.assertEquals(0, exit_code)
-    self.assert_(HELP_REGEX.search(output), output)
-
-    if IS_LINUX or IS_GNUKFREEBSD:
-      self.assert_(STREAM_RESULT_TO_FLAG in output, output)
-    else:
-      self.assert_(STREAM_RESULT_TO_FLAG not in output, output)
-
-    if SUPPORTS_DEATH_TESTS and not IS_WINDOWS:
-      self.assert_(DEATH_TEST_STYLE_FLAG in output, output)
-    else:
-      self.assert_(DEATH_TEST_STYLE_FLAG not in output, output)
-
-  def TestNonHelpFlag(self, flag):
-    """Verifies correct behavior when no help flag is specified.
-
-    Verifies that when no help flag is specified, the tests are run
-    and the help message is not printed.
-
-    Args:
-      flag:  A flag to pass to the binary or None.
-    """
-
-    exit_code, output = RunWithFlag(flag)
-    self.assert_(exit_code != 0)
-    self.assert_(not HELP_REGEX.search(output), output)
-
-  def testPrintsHelpWithFullFlag(self):
-    self.TestHelpFlag('--help')
-
-  def testPrintsHelpWithShortFlag(self):
-    self.TestHelpFlag('-h')
-
-  def testPrintsHelpWithQuestionFlag(self):
-    self.TestHelpFlag('-?')
-
-  def testPrintsHelpWithWindowsStyleQuestionFlag(self):
-    self.TestHelpFlag('/?')
-
-  def testPrintsHelpWithUnrecognizedGoogleTestFlag(self):
-    self.TestHelpFlag(UNKNOWN_FLAG)
-
-  def testPrintsHelpWithIncorrectFlagStyle(self):
-    for incorrect_flag in INCORRECT_FLAG_VARIANTS:
-      self.TestHelpFlag(incorrect_flag)
-
-  def testRunsTestsWithoutHelpFlag(self):
-    """Verifies that when no help flag is specified, the tests are run
-    and the help message is not printed."""
-
-    self.TestNonHelpFlag(None)
-
-  def testRunsTestsWithGtestInternalFlag(self):
-    """Verifies that the tests are run and no help message is printed when
-    a flag starting with Google Test prefix and 'internal_' is supplied."""
-
-    self.TestNonHelpFlag(INTERNAL_FLAG_FOR_TESTING)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_help_test_.cc b/third_party/googletest/googletest/test/gtest_help_test_.cc
deleted file mode 100644
index 750ae6c..0000000
--- a/third_party/googletest/googletest/test/gtest_help_test_.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This program is meant to be run by gtest_help_test.py.  Do not run
-// it directly.
-
-#include "gtest/gtest.h"
-
-// When a help flag is specified, this program should skip the tests
-// and exit with 0; otherwise the following test will be executed,
-// causing this program to exit with a non-zero code.
-TEST(HelpFlagTest, ShouldNotBeRun) {
-  ASSERT_TRUE(false) << "Tests shouldn't be run when --help is specified.";
-}
-
-#if GTEST_HAS_DEATH_TEST
-TEST(DeathTest, UsedByPythonScriptToDetectSupportForDeathTestsInThisBinary) {}
-#endif
diff --git a/third_party/googletest/googletest/test/gtest_json_test_utils.py b/third_party/googletest/googletest/test/gtest_json_test_utils.py
deleted file mode 100644
index 62bbfc2..0000000
--- a/third_party/googletest/googletest/test/gtest_json_test_utils.py
+++ /dev/null
@@ -1,60 +0,0 @@
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for gtest_json_output."""
-
-import re
-
-
-def normalize(obj):
-  """Normalize output object.
-
-  Args:
-     obj: Google Test's JSON output object to normalize.
-
-  Returns:
-     Normalized output without any references to transient information that may
-     change from run to run.
-  """
-  def _normalize(key, value):
-    if key == 'time':
-      return re.sub(r'^\d+(\.\d+)?s$', '*', value)
-    elif key == 'timestamp':
-      return re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\dZ$', '*', value)
-    elif key == 'failure':
-      value = re.sub(r'^.*[/\\](.*:)\d+\n', '\\1*\n', value)
-      return re.sub(r'Stack trace:\n(.|\n)*', 'Stack trace:\n*', value)
-    else:
-      return normalize(value)
-  if isinstance(obj, dict):
-    return {k: _normalize(k, v) for k, v in obj.items()}
-  if isinstance(obj, list):
-    return [normalize(x) for x in obj]
-  else:
-    return obj
diff --git a/third_party/googletest/googletest/test/gtest_list_output_unittest.py b/third_party/googletest/googletest/test/gtest_list_output_unittest.py
deleted file mode 100644
index a442fc1..0000000
--- a/third_party/googletest/googletest/test/gtest_list_output_unittest.py
+++ /dev/null
@@ -1,286 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Unit test for Google Test's --gtest_list_tests flag.
-
-A user can ask Google Test to list all tests by specifying the
---gtest_list_tests flag. If output is requested, via --gtest_output=xml
-or --gtest_output=json, the tests are listed, with extra information in the
-output file.
-This script tests such functionality by invoking gtest_list_output_unittest_
- (a program written with Google Test) the command line flags.
-"""
-
-import os
-import re
-import gtest_test_utils
-
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-
-EXPECTED_XML = """<\?xml version="1.0" encoding="UTF-8"\?>
-<testsuites tests="16" name="AllTests">
-  <testsuite name="FooTest" tests="2">
-    <testcase name="Test1" file=".*gtest_list_output_unittest_.cc" line="43" />
-    <testcase name="Test2" file=".*gtest_list_output_unittest_.cc" line="45" />
-  </testsuite>
-  <testsuite name="FooTestFixture" tests="2">
-    <testcase name="Test3" file=".*gtest_list_output_unittest_.cc" line="48" />
-    <testcase name="Test4" file=".*gtest_list_output_unittest_.cc" line="49" />
-  </testsuite>
-  <testsuite name="TypedTest/0" tests="2">
-    <testcase name="Test7" type_param="int" file=".*gtest_list_output_unittest_.cc" line="60" />
-    <testcase name="Test8" type_param="int" file=".*gtest_list_output_unittest_.cc" line="61" />
-  </testsuite>
-  <testsuite name="TypedTest/1" tests="2">
-    <testcase name="Test7" type_param="bool" file=".*gtest_list_output_unittest_.cc" line="60" />
-    <testcase name="Test8" type_param="bool" file=".*gtest_list_output_unittest_.cc" line="61" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/0" tests="2">
-    <testcase name="Test9" type_param="int" file=".*gtest_list_output_unittest_.cc" line="66" />
-    <testcase name="Test10" type_param="int" file=".*gtest_list_output_unittest_.cc" line="67" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/1" tests="2">
-    <testcase name="Test9" type_param="bool" file=".*gtest_list_output_unittest_.cc" line="66" />
-    <testcase name="Test10" type_param="bool" file=".*gtest_list_output_unittest_.cc" line="67" />
-  </testsuite>
-  <testsuite name="ValueParam/ValueParamTest" tests="4">
-    <testcase name="Test5/0" value_param="33" file=".*gtest_list_output_unittest_.cc" line="52" />
-    <testcase name="Test5/1" value_param="42" file=".*gtest_list_output_unittest_.cc" line="52" />
-    <testcase name="Test6/0" value_param="33" file=".*gtest_list_output_unittest_.cc" line="53" />
-    <testcase name="Test6/1" value_param="42" file=".*gtest_list_output_unittest_.cc" line="53" />
-  </testsuite>
-</testsuites>
-"""
-
-EXPECTED_JSON = """{
-  "tests": 16,
-  "name": "AllTests",
-  "testsuites": \[
-    {
-      "name": "FooTest",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test1",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 43
-        },
-        {
-          "name": "Test2",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 45
-        }
-      \]
-    },
-    {
-      "name": "FooTestFixture",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test3",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 48
-        },
-        {
-          "name": "Test4",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 49
-        }
-      \]
-    },
-    {
-      "name": "TypedTest\\\\/0",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test7",
-          "type_param": "int",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 60
-        },
-        {
-          "name": "Test8",
-          "type_param": "int",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 61
-        }
-      \]
-    },
-    {
-      "name": "TypedTest\\\\/1",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test7",
-          "type_param": "bool",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 60
-        },
-        {
-          "name": "Test8",
-          "type_param": "bool",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 61
-        }
-      \]
-    },
-    {
-      "name": "Single\\\\/TypeParameterizedTestSuite\\\\/0",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test9",
-          "type_param": "int",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 66
-        },
-        {
-          "name": "Test10",
-          "type_param": "int",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 67
-        }
-      \]
-    },
-    {
-      "name": "Single\\\\/TypeParameterizedTestSuite\\\\/1",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test9",
-          "type_param": "bool",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 66
-        },
-        {
-          "name": "Test10",
-          "type_param": "bool",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 67
-        }
-      \]
-    },
-    {
-      "name": "ValueParam\\\\/ValueParamTest",
-      "tests": 4,
-      "testsuite": \[
-        {
-          "name": "Test5\\\\/0",
-          "value_param": "33",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 52
-        },
-        {
-          "name": "Test5\\\\/1",
-          "value_param": "42",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 52
-        },
-        {
-          "name": "Test6\\\\/0",
-          "value_param": "33",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 53
-        },
-        {
-          "name": "Test6\\\\/1",
-          "value_param": "42",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 53
-        }
-      \]
-    }
-  \]
-}
-"""
-
-
-class GTestListTestsOutputUnitTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's list tests with output to file functionality.
-  """
-
-  def testXml(self):
-    """Verifies XML output for listing tests in a Google Test binary.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-    self._TestOutput('xml', EXPECTED_XML)
-
-  def testJSON(self):
-    """Verifies XML output for listing tests in a Google Test binary.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-    self._TestOutput('json', EXPECTED_JSON)
-
-  def _GetOutput(self, out_format):
-    file_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             'test_out.' + out_format)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_list_output_unittest_')
-
-    command = ([
-        gtest_prog_path,
-        '%s=%s:%s' % (GTEST_OUTPUT_FLAG, out_format, file_path),
-        '--gtest_list_tests'
-    ])
-    environ_copy = os.environ.copy()
-    p = gtest_test_utils.Subprocess(
-        command, env=environ_copy, working_dir=gtest_test_utils.GetTempDir())
-
-    self.assertTrue(p.exited)
-    self.assertEqual(0, p.exit_code)
-    self.assertTrue(os.path.isfile(file_path))
-    with open(file_path) as f:
-      result = f.read()
-    return result
-
-  def _TestOutput(self, test_format, expected_output):
-    actual = self._GetOutput(test_format)
-    actual_lines = actual.splitlines()
-    expected_lines = expected_output.splitlines()
-    line_count = 0
-    for actual_line in actual_lines:
-      expected_line = expected_lines[line_count]
-      expected_line_re = re.compile(expected_line.strip())
-      self.assertTrue(
-          expected_line_re.match(actual_line.strip()),
-          ('actual output of "%s",\n'
-           'which does not match expected regex of "%s"\n'
-           'on line %d' % (actual, expected_output, line_count)))
-      line_count = line_count + 1
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_list_output_unittest_.cc b/third_party/googletest/googletest/test/gtest_list_output_unittest_.cc
deleted file mode 100644
index 92b9d4f..0000000
--- a/third_party/googletest/googletest/test/gtest_list_output_unittest_.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright 2018, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: david.schuldenfrei@gmail.com (David Schuldenfrei)
-
-// Unit test for Google Test's --gtest_list_tests and --gtest_output flag.
-//
-// A user can ask Google Test to list all tests that will run,
-// and have the output saved in a Json/Xml file.
-// The tests will not be run after listing.
-//
-// This program will be invoked from a Python unit test.
-// Don't run it directly.
-
-#include "gtest/gtest.h"
-
-TEST(FooTest, Test1) {}
-
-TEST(FooTest, Test2) {}
-
-class FooTestFixture : public ::testing::Test {};
-TEST_F(FooTestFixture, Test3) {}
-TEST_F(FooTestFixture, Test4) {}
-
-class ValueParamTest : public ::testing::TestWithParam<int> {};
-TEST_P(ValueParamTest, Test5) {}
-TEST_P(ValueParamTest, Test6) {}
-INSTANTIATE_TEST_SUITE_P(ValueParam, ValueParamTest, ::testing::Values(33, 42));
-
-template <typename T>
-class TypedTest : public ::testing::Test {};
-typedef testing::Types<int, bool> TypedTestTypes;
-TYPED_TEST_SUITE(TypedTest, TypedTestTypes);
-TYPED_TEST(TypedTest, Test7) {}
-TYPED_TEST(TypedTest, Test8) {}
-
-template <typename T>
-class TypeParameterizedTestSuite : public ::testing::Test {};
-TYPED_TEST_SUITE_P(TypeParameterizedTestSuite);
-TYPED_TEST_P(TypeParameterizedTestSuite, Test9) {}
-TYPED_TEST_P(TypeParameterizedTestSuite, Test10) {}
-REGISTER_TYPED_TEST_SUITE_P(TypeParameterizedTestSuite, Test9, Test10);
-typedef testing::Types<int, bool> TypeParameterizedTestSuiteTypes;  // NOLINT
-INSTANTIATE_TYPED_TEST_SUITE_P(Single, TypeParameterizedTestSuite,
-                               TypeParameterizedTestSuiteTypes);
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/gtest_main_unittest.cc b/third_party/googletest/googletest/test/gtest_main_unittest.cc
deleted file mode 100644
index eddedea..0000000
--- a/third_party/googletest/googletest/test/gtest_main_unittest.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-// Tests that we don't have to define main() when we link to
-// gtest_main instead of gtest.
-
-namespace {
-
-TEST(GTestMainTest, ShouldSucceed) {
-}
-
-}  // namespace
-
-// We are using the main() function defined in gtest_main.cc, so we
-// don't define it here.
diff --git a/third_party/googletest/googletest/test/gtest_no_test_unittest.cc b/third_party/googletest/googletest/test/gtest_no_test_unittest.cc
deleted file mode 100644
index d4f88db..0000000
--- a/third_party/googletest/googletest/test/gtest_no_test_unittest.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Tests that a Google Test program that has no test defined can run
-// successfully.
-
-#include "gtest/gtest.h"
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // An ad-hoc assertion outside of all tests.
-  //
-  // This serves three purposes:
-  //
-  // 1. It verifies that an ad-hoc assertion can be executed even if
-  //    no test is defined.
-  // 2. It verifies that a failed ad-hoc assertion causes the test
-  //    program to fail.
-  // 3. We had a bug where the XML output won't be generated if an
-  //    assertion is executed before RUN_ALL_TESTS() is called, even
-  //    though --gtest_output=xml is specified.  This makes sure the
-  //    bug is fixed and doesn't regress.
-  EXPECT_EQ(1, 2);
-
-  // The above EXPECT_EQ() should cause RUN_ALL_TESTS() to return non-zero.
-  return RUN_ALL_TESTS() ? 0 : 1;
-}
diff --git a/third_party/googletest/googletest/test/gtest_pred_impl_unittest.cc b/third_party/googletest/googletest/test/gtest_pred_impl_unittest.cc
deleted file mode 100644
index bbef994..0000000
--- a/third_party/googletest/googletest/test/gtest_pred_impl_unittest.cc
+++ /dev/null
@@ -1,2422 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 11/05/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-
-// Regression test for gtest_pred_impl.h
-//
-// This file is generated by a script and quite long.  If you intend to
-// learn how Google Test works by reading its unit tests, read
-// gtest_unittest.cc instead.
-//
-// This is intended as a regression test for the Google Test predicate
-// assertions.  We compile it as part of the gtest_unittest target
-// only to keep the implementation tidy and compact, as it is quite
-// involved to set up the stage for testing Google Test using Google
-// Test itself.
-//
-// Currently, gtest_unittest takes ~11 seconds to run in the testing
-// daemon.  In the future, if it grows too large and needs much more
-// time to finish, we should consider separating this file into a
-// stand-alone regression test.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-// A user-defined data type.
-struct Bool {
-  explicit Bool(int val) : value(val != 0) {}
-
-  bool operator>(int n) const { return value > Bool(n).value; }
-
-  Bool operator+(const Bool& rhs) const { return Bool(value + rhs.value); }
-
-  bool operator==(const Bool& rhs) const { return value == rhs.value; }
-
-  bool value;
-};
-
-// Enables Bool to be used in assertions.
-std::ostream& operator<<(std::ostream& os, const Bool& x) {
-  return os << (x.value ? "true" : "false");
-}
-
-// Sample functions/functors for testing unary predicate assertions.
-
-// A unary predicate function.
-template <typename T1>
-bool PredFunction1(T1 v1) {
-  return v1 > 0;
-}
-
-// The following two functions are needed because a compiler doesn't have
-// a context yet to know which template function must be instantiated.
-bool PredFunction1Int(int v1) {
-  return v1 > 0;
-}
-bool PredFunction1Bool(Bool v1) {
-  return v1 > 0;
-}
-
-// A unary predicate functor.
-struct PredFunctor1 {
-  template <typename T1>
-  bool operator()(const T1& v1) {
-    return v1 > 0;
-  }
-};
-
-// A unary predicate-formatter function.
-template <typename T1>
-testing::AssertionResult PredFormatFunction1(const char* e1,
-                                             const T1& v1) {
-  if (PredFunction1(v1))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1
-      << " is expected to be positive, but evaluates to "
-      << v1 << ".";
-}
-
-// A unary predicate-formatter functor.
-struct PredFormatFunctor1 {
-  template <typename T1>
-  testing::AssertionResult operator()(const char* e1,
-                                      const T1& v1) const {
-    return PredFormatFunction1(e1, v1);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT1.
-
-class Predicate1Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-};
-
-bool Predicate1Test::expected_to_finish_;
-bool Predicate1Test::finished_;
-int Predicate1Test::n1_;
-
-typedef Predicate1Test EXPECT_PRED_FORMAT1Test;
-typedef Predicate1Test ASSERT_PRED_FORMAT1Test;
-typedef Predicate1Test EXPECT_PRED1Test;
-typedef Predicate1Test ASSERT_PRED1Test;
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED1(PredFunction1Int,
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED1(PredFunction1Bool,
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED1(PredFunctor1(),
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED1(PredFunctor1(),
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunction1Int,
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunction1Bool,
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunctor1(),
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunctor1(),
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED1(PredFunction1Int,
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED1(PredFunction1Bool,
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED1(PredFunctor1(),
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED1(PredFunctor1(),
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunction1Int,
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunction1Bool,
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunctor1(),
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunctor1(),
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing binary predicate assertions.
-
-// A binary predicate function.
-template <typename T1, typename T2>
-bool PredFunction2(T1 v1, T2 v2) {
-  return v1 + v2 > 0;
-}
-
-// The following two functions are needed because a compiler doesn't have
-// a context yet to know which template function must be instantiated.
-bool PredFunction2Int(int v1, int v2) {
-  return v1 + v2 > 0;
-}
-bool PredFunction2Bool(Bool v1, Bool v2) {
-  return v1 + v2 > 0;
-}
-
-// A binary predicate functor.
-struct PredFunctor2 {
-  template <typename T1, typename T2>
-  bool operator()(const T1& v1,
-                  const T2& v2) {
-    return v1 + v2 > 0;
-  }
-};
-
-// A binary predicate-formatter function.
-template <typename T1, typename T2>
-testing::AssertionResult PredFormatFunction2(const char* e1,
-                                             const char* e2,
-                                             const T1& v1,
-                                             const T2& v2) {
-  if (PredFunction2(v1, v2))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 << ".";
-}
-
-// A binary predicate-formatter functor.
-struct PredFormatFunctor2 {
-  template <typename T1, typename T2>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const T1& v1,
-                                      const T2& v2) const {
-    return PredFormatFunction2(e1, e2, v1, v2);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT2.
-
-class Predicate2Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-};
-
-bool Predicate2Test::expected_to_finish_;
-bool Predicate2Test::finished_;
-int Predicate2Test::n1_;
-int Predicate2Test::n2_;
-
-typedef Predicate2Test EXPECT_PRED_FORMAT2Test;
-typedef Predicate2Test ASSERT_PRED_FORMAT2Test;
-typedef Predicate2Test EXPECT_PRED2Test;
-typedef Predicate2Test ASSERT_PRED2Test;
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED2(PredFunction2Int,
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED2(PredFunction2Bool,
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED2(PredFunctor2(),
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED2(PredFunctor2(),
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunction2Int,
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunction2Bool,
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunctor2(),
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunctor2(),
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED2(PredFunction2Int,
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED2(PredFunction2Bool,
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED2(PredFunctor2(),
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED2(PredFunctor2(),
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunction2Int,
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunction2Bool,
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunctor2(),
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunctor2(),
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing ternary predicate assertions.
-
-// A ternary predicate function.
-template <typename T1, typename T2, typename T3>
-bool PredFunction3(T1 v1, T2 v2, T3 v3) {
-  return v1 + v2 + v3 > 0;
-}
-
-// The following two functions are needed because a compiler doesn't have
-// a context yet to know which template function must be instantiated.
-bool PredFunction3Int(int v1, int v2, int v3) {
-  return v1 + v2 + v3 > 0;
-}
-bool PredFunction3Bool(Bool v1, Bool v2, Bool v3) {
-  return v1 + v2 + v3 > 0;
-}
-
-// A ternary predicate functor.
-struct PredFunctor3 {
-  template <typename T1, typename T2, typename T3>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3) {
-    return v1 + v2 + v3 > 0;
-  }
-};
-
-// A ternary predicate-formatter function.
-template <typename T1, typename T2, typename T3>
-testing::AssertionResult PredFormatFunction3(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3) {
-  if (PredFunction3(v1, v2, v3))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 << ".";
-}
-
-// A ternary predicate-formatter functor.
-struct PredFormatFunctor3 {
-  template <typename T1, typename T2, typename T3>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3) const {
-    return PredFormatFunction3(e1, e2, e3, v1, v2, v3);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT3.
-
-class Predicate3Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-};
-
-bool Predicate3Test::expected_to_finish_;
-bool Predicate3Test::finished_;
-int Predicate3Test::n1_;
-int Predicate3Test::n2_;
-int Predicate3Test::n3_;
-
-typedef Predicate3Test EXPECT_PRED_FORMAT3Test;
-typedef Predicate3Test ASSERT_PRED_FORMAT3Test;
-typedef Predicate3Test EXPECT_PRED3Test;
-typedef Predicate3Test ASSERT_PRED3Test;
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED3(PredFunction3Int,
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED3(PredFunction3Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED3(PredFunctor3(),
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED3(PredFunctor3(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunction3Int,
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunction3Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunctor3(),
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunctor3(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED3(PredFunction3Int,
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED3(PredFunction3Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED3(PredFunctor3(),
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED3(PredFunctor3(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunction3Int,
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunction3Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunctor3(),
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunctor3(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing 4-ary predicate assertions.
-
-// A 4-ary predicate function.
-template <typename T1, typename T2, typename T3, typename T4>
-bool PredFunction4(T1 v1, T2 v2, T3 v3, T4 v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-
-// The following two functions are needed because a compiler doesn't have
-// a context yet to know which template function must be instantiated.
-bool PredFunction4Int(int v1, int v2, int v3, int v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-bool PredFunction4Bool(Bool v1, Bool v2, Bool v3, Bool v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-
-// A 4-ary predicate functor.
-struct PredFunctor4 {
-  template <typename T1, typename T2, typename T3, typename T4>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3,
-                  const T4& v4) {
-    return v1 + v2 + v3 + v4 > 0;
-  }
-};
-
-// A 4-ary predicate-formatter function.
-template <typename T1, typename T2, typename T3, typename T4>
-testing::AssertionResult PredFormatFunction4(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const char* e4,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3,
-                                             const T4& v4) {
-  if (PredFunction4(v1, v2, v3, v4))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3 << " + " << e4
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 + v4 << ".";
-}
-
-// A 4-ary predicate-formatter functor.
-struct PredFormatFunctor4 {
-  template <typename T1, typename T2, typename T3, typename T4>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const char* e4,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3,
-                                      const T4& v4) const {
-    return PredFormatFunction4(e1, e2, e3, e4, v1, v2, v3, v4);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT4.
-
-class Predicate4Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = n4_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-    EXPECT_EQ(1, n4_) <<
-        "The predicate assertion didn't evaluate argument 5 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-  static int n4_;
-};
-
-bool Predicate4Test::expected_to_finish_;
-bool Predicate4Test::finished_;
-int Predicate4Test::n1_;
-int Predicate4Test::n2_;
-int Predicate4Test::n3_;
-int Predicate4Test::n4_;
-
-typedef Predicate4Test EXPECT_PRED_FORMAT4Test;
-typedef Predicate4Test ASSERT_PRED_FORMAT4Test;
-typedef Predicate4Test EXPECT_PRED4Test;
-typedef Predicate4Test ASSERT_PRED4Test;
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED4(PredFunction4Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED4(PredFunction4Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED4(PredFunctor4(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED4(PredFunctor4(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunction4Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunction4Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunctor4(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunctor4(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED4(PredFunction4Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED4(PredFunction4Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED4(PredFunctor4(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED4(PredFunctor4(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunction4Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunction4Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunctor4(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunctor4(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing 5-ary predicate assertions.
-
-// A 5-ary predicate function.
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-bool PredFunction5(T1 v1, T2 v2, T3 v3, T4 v4, T5 v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-
-// The following two functions are needed because a compiler doesn't have
-// a context yet to know which template function must be instantiated.
-bool PredFunction5Int(int v1, int v2, int v3, int v4, int v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-bool PredFunction5Bool(Bool v1, Bool v2, Bool v3, Bool v4, Bool v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-
-// A 5-ary predicate functor.
-struct PredFunctor5 {
-  template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3,
-                  const T4& v4,
-                  const T5& v5) {
-    return v1 + v2 + v3 + v4 + v5 > 0;
-  }
-};
-
-// A 5-ary predicate-formatter function.
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-testing::AssertionResult PredFormatFunction5(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const char* e4,
-                                             const char* e5,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3,
-                                             const T4& v4,
-                                             const T5& v5) {
-  if (PredFunction5(v1, v2, v3, v4, v5))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3 << " + " << e4 << " + " << e5
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 + v4 + v5 << ".";
-}
-
-// A 5-ary predicate-formatter functor.
-struct PredFormatFunctor5 {
-  template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const char* e4,
-                                      const char* e5,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3,
-                                      const T4& v4,
-                                      const T5& v5) const {
-    return PredFormatFunction5(e1, e2, e3, e4, e5, v1, v2, v3, v4, v5);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT5.
-
-class Predicate5Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = n4_ = n5_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-    EXPECT_EQ(1, n4_) <<
-        "The predicate assertion didn't evaluate argument 5 "
-        "exactly once.";
-    EXPECT_EQ(1, n5_) <<
-        "The predicate assertion didn't evaluate argument 6 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-  static int n4_;
-  static int n5_;
-};
-
-bool Predicate5Test::expected_to_finish_;
-bool Predicate5Test::finished_;
-int Predicate5Test::n1_;
-int Predicate5Test::n2_;
-int Predicate5Test::n3_;
-int Predicate5Test::n4_;
-int Predicate5Test::n5_;
-
-typedef Predicate5Test EXPECT_PRED_FORMAT5Test;
-typedef Predicate5Test ASSERT_PRED_FORMAT5Test;
-typedef Predicate5Test EXPECT_PRED5Test;
-typedef Predicate5Test ASSERT_PRED5Test;
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED5(PredFunction5Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED5(PredFunction5Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED5(PredFunctor5(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED5(PredFunctor5(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunction5Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunction5Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunctor5(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunctor5(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED5(PredFunction5Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED5(PredFunction5Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED5(PredFunctor5(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED5(PredFunctor5(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunction5Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunction5Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunctor5(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunctor5(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
diff --git a/third_party/googletest/googletest/test/gtest_premature_exit_test.cc b/third_party/googletest/googletest/test/gtest_premature_exit_test.cc
deleted file mode 100644
index 1d1187e..0000000
--- a/third_party/googletest/googletest/test/gtest_premature_exit_test.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests that Google Test manipulates the premature-exit-detection
-// file correctly.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::internal::posix::GetEnv;
-using ::testing::internal::posix::Stat;
-using ::testing::internal::posix::StatStruct;
-
-namespace {
-
-class PrematureExitTest : public Test {
- public:
-  // Returns true if and only if the given file exists.
-  static bool FileExists(const char* filepath) {
-    StatStruct stat;
-    return Stat(filepath, &stat) == 0;
-  }
-
- protected:
-  PrematureExitTest() {
-    premature_exit_file_path_ = GetEnv("TEST_PREMATURE_EXIT_FILE");
-
-    // Normalize NULL to "" for ease of handling.
-    if (premature_exit_file_path_ == nullptr) {
-      premature_exit_file_path_ = "";
-    }
-  }
-
-  // Returns true if and only if the premature-exit file exists.
-  bool PrematureExitFileExists() const {
-    return FileExists(premature_exit_file_path_);
-  }
-
-  const char* premature_exit_file_path_;
-};
-
-typedef PrematureExitTest PrematureExitDeathTest;
-
-// Tests that:
-//   - the premature-exit file exists during the execution of a
-//     death test (EXPECT_DEATH*), and
-//   - a death test doesn't interfere with the main test process's
-//     handling of the premature-exit file.
-TEST_F(PrematureExitDeathTest, FileExistsDuringExecutionOfDeathTest) {
-  if (*premature_exit_file_path_ == '\0') {
-    return;
-  }
-
-  EXPECT_DEATH_IF_SUPPORTED({
-      // If the file exists, crash the process such that the main test
-      // process will catch the (expected) crash and report a success;
-      // otherwise don't crash, which will cause the main test process
-      // to report that the death test has failed.
-      if (PrematureExitFileExists()) {
-        exit(1);
-      }
-    }, "");
-}
-
-// Tests that the premature-exit file exists during the execution of a
-// normal (non-death) test.
-TEST_F(PrematureExitTest, PrematureExitFileExistsDuringTestExecution) {
-  if (*premature_exit_file_path_ == '\0') {
-    return;
-  }
-
-  EXPECT_TRUE(PrematureExitFileExists())
-      << " file " << premature_exit_file_path_
-      << " should exist during test execution, but doesn't.";
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-  const int exit_code = RUN_ALL_TESTS();
-
-  // Test that the premature-exit file is deleted upon return from
-  // RUN_ALL_TESTS().
-  const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
-  if (filepath != nullptr && *filepath != '\0') {
-    if (PrematureExitTest::FileExists(filepath)) {
-      printf(
-          "File %s shouldn't exist after the test program finishes, but does.",
-          filepath);
-      return 1;
-    }
-  }
-
-  return exit_code;
-}
diff --git a/third_party/googletest/googletest/test/gtest_prod_test.cc b/third_party/googletest/googletest/test/gtest_prod_test.cc
deleted file mode 100644
index ede81a0..0000000
--- a/third_party/googletest/googletest/test/gtest_prod_test.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Unit test for gtest_prod.h.
-
-#include "production.h"
-#include "gtest/gtest.h"
-
-// Tests that private members can be accessed from a TEST declared as
-// a friend of the class.
-TEST(PrivateCodeTest, CanAccessPrivateMembers) {
-  PrivateCode a;
-  EXPECT_EQ(0, a.x_);
-
-  a.set_x(1);
-  EXPECT_EQ(1, a.x_);
-}
-
-typedef testing::Test PrivateCodeFixtureTest;
-
-// Tests that private members can be accessed from a TEST_F declared
-// as a friend of the class.
-TEST_F(PrivateCodeFixtureTest, CanAccessPrivateMembers) {
-  PrivateCode a;
-  EXPECT_EQ(0, a.x_);
-
-  a.set_x(2);
-  EXPECT_EQ(2, a.x_);
-}
diff --git a/third_party/googletest/googletest/test/gtest_repeat_test.cc b/third_party/googletest/googletest/test/gtest_repeat_test.cc
deleted file mode 100644
index 7da4a15..0000000
--- a/third_party/googletest/googletest/test/gtest_repeat_test.cc
+++ /dev/null
@@ -1,233 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests the --gtest_repeat=number flag.
-
-#include <stdlib.h>
-#include <iostream>
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-GTEST_DECLARE_string_(death_test_style);
-GTEST_DECLARE_string_(filter);
-GTEST_DECLARE_int32_(repeat);
-
-}  // namespace testing
-
-using testing::GTEST_FLAG(death_test_style);
-using testing::GTEST_FLAG(filter);
-using testing::GTEST_FLAG(repeat);
-
-namespace {
-
-// We need this when we are testing Google Test itself and therefore
-// cannot use Google Test assertions.
-#define GTEST_CHECK_INT_EQ_(expected, actual) \
-  do {\
-    const int expected_val = (expected);\
-    const int actual_val = (actual);\
-    if (::testing::internal::IsTrue(expected_val != actual_val)) {\
-      ::std::cout << "Value of: " #actual "\n"\
-                  << "  Actual: " << actual_val << "\n"\
-                  << "Expected: " #expected "\n"\
-                  << "Which is: " << expected_val << "\n";\
-      ::testing::internal::posix::Abort();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-
-// Used for verifying that global environment set-up and tear-down are
-// inside the --gtest_repeat loop.
-
-int g_environment_set_up_count = 0;
-int g_environment_tear_down_count = 0;
-
-class MyEnvironment : public testing::Environment {
- public:
-  MyEnvironment() {}
-  void SetUp() override { g_environment_set_up_count++; }
-  void TearDown() override { g_environment_tear_down_count++; }
-};
-
-// A test that should fail.
-
-int g_should_fail_count = 0;
-
-TEST(FooTest, ShouldFail) {
-  g_should_fail_count++;
-  EXPECT_EQ(0, 1) << "Expected failure.";
-}
-
-// A test that should pass.
-
-int g_should_pass_count = 0;
-
-TEST(FooTest, ShouldPass) {
-  g_should_pass_count++;
-}
-
-// A test that contains a thread-safe death test and a fast death
-// test.  It should pass.
-
-int g_death_test_count = 0;
-
-TEST(BarDeathTest, ThreadSafeAndFast) {
-  g_death_test_count++;
-
-  GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_DEATH_IF_SUPPORTED(::testing::internal::posix::Abort(), "");
-
-  GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH_IF_SUPPORTED(::testing::internal::posix::Abort(), "");
-}
-
-int g_param_test_count = 0;
-
-const int kNumberOfParamTests = 10;
-
-class MyParamTest : public testing::TestWithParam<int> {};
-
-TEST_P(MyParamTest, ShouldPass) {
-  GTEST_CHECK_INT_EQ_(g_param_test_count % kNumberOfParamTests, GetParam());
-  g_param_test_count++;
-}
-INSTANTIATE_TEST_SUITE_P(MyParamSequence,
-                         MyParamTest,
-                         testing::Range(0, kNumberOfParamTests));
-
-// Resets the count for each test.
-void ResetCounts() {
-  g_environment_set_up_count = 0;
-  g_environment_tear_down_count = 0;
-  g_should_fail_count = 0;
-  g_should_pass_count = 0;
-  g_death_test_count = 0;
-  g_param_test_count = 0;
-}
-
-// Checks that the count for each test is expected.
-void CheckCounts(int expected) {
-  GTEST_CHECK_INT_EQ_(expected, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(expected, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(expected, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(expected, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(expected, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(expected * kNumberOfParamTests, g_param_test_count);
-}
-
-// Tests the behavior of Google Test when --gtest_repeat is not specified.
-void TestRepeatUnspecified() {
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(1, RUN_ALL_TESTS());
-  CheckCounts(1);
-}
-
-// Tests the behavior of Google Test when --gtest_repeat has the given value.
-void TestRepeat(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(repeat > 0 ? 1 : 0, RUN_ALL_TESTS());
-  CheckCounts(repeat);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies an empty
-// set of tests.
-void TestRepeatWithEmptyFilter(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "None";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(0, RUN_ALL_TESTS());
-  CheckCounts(0);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies a set of
-// successful tests.
-void TestRepeatWithFilterForSuccessfulTests(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "*-*ShouldFail";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(0, RUN_ALL_TESTS());
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(0, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(repeat * kNumberOfParamTests, g_param_test_count);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies a set of
-// failed tests.
-void TestRepeatWithFilterForFailedTests(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "*ShouldFail";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(1, RUN_ALL_TESTS());
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(0, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(0, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(0, g_param_test_count);
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  testing::AddGlobalTestEnvironment(new MyEnvironment);
-
-  TestRepeatUnspecified();
-  TestRepeat(0);
-  TestRepeat(1);
-  TestRepeat(5);
-
-  TestRepeatWithEmptyFilter(2);
-  TestRepeatWithEmptyFilter(3);
-
-  TestRepeatWithFilterForSuccessfulTests(3);
-
-  TestRepeatWithFilterForFailedTests(4);
-
-  // It would be nice to verify that the tests indeed loop forever
-  // when GTEST_FLAG(repeat) is negative, but this test will be quite
-  // complicated to write.  Since this flag is for interactive
-  // debugging only and doesn't affect the normal test result, such a
-  // test would be an overkill.
-
-  printf("PASS\n");
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/gtest_skip_check_output_test.py b/third_party/googletest/googletest/test/gtest_skip_check_output_test.py
deleted file mode 100755
index 14e63ab..0000000
--- a/third_party/googletest/googletest/test/gtest_skip_check_output_test.py
+++ /dev/null
@@ -1,59 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2019 Google LLC.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Tests Google Test's gtest skip in environment setup  behavior.
-
-This script invokes gtest_skip_in_environment_setup_test_ and verifies its
-output.
-"""
-
-import re
-
-import gtest_test_utils
-
-# Path to the gtest_skip_in_environment_setup_test binary
-EXE_PATH = gtest_test_utils.GetTestExecutablePath('gtest_skip_test')
-
-OUTPUT = gtest_test_utils.Subprocess([EXE_PATH]).output
-
-
-# Test.
-class SkipEntireEnvironmentTest(gtest_test_utils.TestCase):
-
-  def testSkipEntireEnvironmentTest(self):
-    self.assertIn('Skipped\nskipping single test\n', OUTPUT)
-    skip_fixture = 'Skipped\nskipping all tests for this fixture\n'
-    self.assertIsNotNone(
-        re.search(skip_fixture + '.*' + skip_fixture, OUTPUT, flags=re.DOTALL),
-        repr(OUTPUT))
-    self.assertNotIn('FAILED', OUTPUT)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_skip_environment_check_output_test.py b/third_party/googletest/googletest/test/gtest_skip_environment_check_output_test.py
deleted file mode 100755
index 6e79155..0000000
--- a/third_party/googletest/googletest/test/gtest_skip_environment_check_output_test.py
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2019 Google LLC.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Tests Google Test's gtest skip in environment setup  behavior.
-
-This script invokes gtest_skip_in_environment_setup_test_ and verifies its
-output.
-"""
-
-import gtest_test_utils
-
-# Path to the gtest_skip_in_environment_setup_test binary
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'gtest_skip_in_environment_setup_test')
-
-OUTPUT = gtest_test_utils.Subprocess([EXE_PATH]).output
-
-
-# Test.
-class SkipEntireEnvironmentTest(gtest_test_utils.TestCase):
-
-  def testSkipEntireEnvironmentTest(self):
-    self.assertIn('Skipping the entire environment', OUTPUT)
-    self.assertNotIn('FAILED', OUTPUT)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_skip_in_environment_setup_test.cc b/third_party/googletest/googletest/test/gtest_skip_in_environment_setup_test.cc
deleted file mode 100644
index 9372310..0000000
--- a/third_party/googletest/googletest/test/gtest_skip_in_environment_setup_test.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2019, Google LLC.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google LLC. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This test verifies that skipping in the environment results in the
-// testcases being skipped.
-
-#include <iostream>
-#include "gtest/gtest.h"
-
-class SetupEnvironment : public testing::Environment {
- public:
-  void SetUp() override { GTEST_SKIP() << "Skipping the entire environment"; }
-};
-
-TEST(Test, AlwaysFails) { EXPECT_EQ(true, false); }
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  testing::AddGlobalTestEnvironment(new SetupEnvironment());
-
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/gtest_skip_test.cc b/third_party/googletest/googletest/test/gtest_skip_test.cc
deleted file mode 100644
index 4a23004..0000000
--- a/third_party/googletest/googletest/test/gtest_skip_test.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: arseny.aprelev@gmail.com (Arseny Aprelev)
-//
-
-#include "gtest/gtest.h"
-
-using ::testing::Test;
-
-TEST(SkipTest, DoesSkip) {
-  GTEST_SKIP() << "skipping single test";
-  EXPECT_EQ(0, 1);
-}
-
-class Fixture : public Test {
- protected:
-  void SetUp() override {
-    GTEST_SKIP() << "skipping all tests for this fixture";
-  }
-};
-
-TEST_F(Fixture, SkipsOneTest) {
-  EXPECT_EQ(5, 7);
-}
-
-TEST_F(Fixture, SkipsAnotherTest) {
-  EXPECT_EQ(99, 100);
-}
diff --git a/third_party/googletest/googletest/test/gtest_sole_header_test.cc b/third_party/googletest/googletest/test/gtest_sole_header_test.cc
deleted file mode 100644
index 1d94ac6..0000000
--- a/third_party/googletest/googletest/test/gtest_sole_header_test.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This test verifies that it's possible to use Google Test by including
-// the gtest.h header file alone.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-void Subroutine() {
-  EXPECT_EQ(42, 42);
-}
-
-TEST(NoFatalFailureTest, ExpectNoFatalFailure) {
-  EXPECT_NO_FATAL_FAILURE(;);
-  EXPECT_NO_FATAL_FAILURE(SUCCEED());
-  EXPECT_NO_FATAL_FAILURE(Subroutine());
-  EXPECT_NO_FATAL_FAILURE({ SUCCEED(); });
-}
-
-TEST(NoFatalFailureTest, AssertNoFatalFailure) {
-  ASSERT_NO_FATAL_FAILURE(;);
-  ASSERT_NO_FATAL_FAILURE(SUCCEED());
-  ASSERT_NO_FATAL_FAILURE(Subroutine());
-  ASSERT_NO_FATAL_FAILURE({ SUCCEED(); });
-}
-
-}  // namespace
diff --git a/third_party/googletest/googletest/test/gtest_stress_test.cc b/third_party/googletest/googletest/test/gtest_stress_test.cc
deleted file mode 100644
index 8434819..0000000
--- a/third_party/googletest/googletest/test/gtest_stress_test.cc
+++ /dev/null
@@ -1,248 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests that SCOPED_TRACE() and various Google Test assertions can be
-// used in a large number of threads concurrently.
-
-#include "gtest/gtest.h"
-
-#include <vector>
-
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_IS_THREADSAFE
-
-namespace testing {
-namespace {
-
-using internal::Notification;
-using internal::TestPropertyKeyIs;
-using internal::ThreadWithParam;
-
-// In order to run tests in this file, for platforms where Google Test is
-// thread safe, implement ThreadWithParam. See the description of its API
-// in gtest-port.h, where it is defined for already supported platforms.
-
-// How many threads to create?
-const int kThreadCount = 50;
-
-std::string IdToKey(int id, const char* suffix) {
-  Message key;
-  key << "key_" << id << "_" << suffix;
-  return key.GetString();
-}
-
-std::string IdToString(int id) {
-  Message id_message;
-  id_message << id;
-  return id_message.GetString();
-}
-
-void ExpectKeyAndValueWereRecordedForId(
-    const std::vector<TestProperty>& properties,
-    int id, const char* suffix) {
-  TestPropertyKeyIs matches_key(IdToKey(id, suffix).c_str());
-  const std::vector<TestProperty>::const_iterator property =
-      std::find_if(properties.begin(), properties.end(), matches_key);
-  ASSERT_TRUE(property != properties.end())
-      << "expecting " << suffix << " value for id " << id;
-  EXPECT_STREQ(IdToString(id).c_str(), property->value());
-}
-
-// Calls a large number of Google Test assertions, where exactly one of them
-// will fail.
-void ManyAsserts(int id) {
-  GTEST_LOG_(INFO) << "Thread #" << id << " running...";
-
-  SCOPED_TRACE(Message() << "Thread #" << id);
-
-  for (int i = 0; i < kThreadCount; i++) {
-    SCOPED_TRACE(Message() << "Iteration #" << i);
-
-    // A bunch of assertions that should succeed.
-    EXPECT_TRUE(true);
-    ASSERT_FALSE(false) << "This shouldn't fail.";
-    EXPECT_STREQ("a", "a");
-    ASSERT_LE(5, 6);
-    EXPECT_EQ(i, i) << "This shouldn't fail.";
-
-    // RecordProperty() should interact safely with other threads as well.
-    // The shared_key forces property updates.
-    Test::RecordProperty(IdToKey(id, "string").c_str(), IdToString(id).c_str());
-    Test::RecordProperty(IdToKey(id, "int").c_str(), id);
-    Test::RecordProperty("shared_key", IdToString(id).c_str());
-
-    // This assertion should fail kThreadCount times per thread.  It
-    // is for testing whether Google Test can handle failed assertions in a
-    // multi-threaded context.
-    EXPECT_LT(i, 0) << "This should always fail.";
-  }
-}
-
-void CheckTestFailureCount(int expected_failures) {
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult* const result = info->result();
-  GTEST_CHECK_(expected_failures == result->total_part_count())
-      << "Logged " << result->total_part_count() << " failures "
-      << " vs. " << expected_failures << " expected";
-}
-
-// Tests using SCOPED_TRACE() and Google Test assertions in many threads
-// concurrently.
-TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
-  {
-    std::unique_ptr<ThreadWithParam<int> > threads[kThreadCount];
-    Notification threads_can_start;
-    for (int i = 0; i != kThreadCount; i++)
-      threads[i].reset(new ThreadWithParam<int>(&ManyAsserts,
-                                                i,
-                                                &threads_can_start));
-
-    threads_can_start.Notify();
-
-    // Blocks until all the threads are done.
-    for (int i = 0; i != kThreadCount; i++)
-      threads[i]->Join();
-  }
-
-  // Ensures that kThreadCount*kThreadCount failures have been reported.
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult* const result = info->result();
-
-  std::vector<TestProperty> properties;
-  // We have no access to the TestResult's list of properties but we can
-  // copy them one by one.
-  for (int i = 0; i < result->test_property_count(); ++i)
-    properties.push_back(result->GetTestProperty(i));
-
-  EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
-      << "String and int values recorded on each thread, "
-      << "as well as one shared_key";
-  for (int i = 0; i < kThreadCount; ++i) {
-    ExpectKeyAndValueWereRecordedForId(properties, i, "string");
-    ExpectKeyAndValueWereRecordedForId(properties, i, "int");
-  }
-  CheckTestFailureCount(kThreadCount*kThreadCount);
-}
-
-void FailingThread(bool is_fatal) {
-  if (is_fatal)
-    FAIL() << "Fatal failure in some other thread. "
-           << "(This failure is expected.)";
-  else
-    ADD_FAILURE() << "Non-fatal failure in some other thread. "
-                  << "(This failure is expected.)";
-}
-
-void GenerateFatalFailureInAnotherThread(bool is_fatal) {
-  ThreadWithParam<bool> thread(&FailingThread, is_fatal, nullptr);
-  thread.Join();
-}
-
-TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
-  EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
-  // We should only have one failure (the one from
-  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
-  // should succeed.
-  CheckTestFailureCount(1);
-}
-
-void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
-  ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
-}
-TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
-  // Using a subroutine, to make sure, that the test continues.
-  AssertNoFatalFailureIgnoresFailuresInOtherThreads();
-  // We should only have one failure (the one from
-  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
-  // should succeed.
-  CheckTestFailureCount(1);
-}
-
-TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
-  // This statement should fail, since the current thread doesn't generate a
-  // fatal failure, only another one does.
-  EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
-  CheckTestFailureCount(2);
-}
-
-TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
-  // This statement should succeed, because failures in all threads are
-  // considered.
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
-      GenerateFatalFailureInAnotherThread(true), "expected");
-  CheckTestFailureCount(0);
-  // We need to add a failure, because main() checks that there are failures.
-  // But when only this test is run, we shouldn't have any failures.
-  ADD_FAILURE() << "This is an expected non-fatal failure.";
-}
-
-TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
-  // This statement should fail, since the current thread doesn't generate a
-  // fatal failure, only another one does.
-  EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
-                          "expected");
-  CheckTestFailureCount(2);
-}
-
-TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  // This statement should succeed, because failures in all threads are
-  // considered.
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
-      GenerateFatalFailureInAnotherThread(false), "expected");
-  CheckTestFailureCount(0);
-  // We need to add a failure, because main() checks that there are failures,
-  // But when only this test is run, we shouldn't have any failures.
-  ADD_FAILURE() << "This is an expected non-fatal failure.";
-}
-
-}  // namespace
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  const int result = RUN_ALL_TESTS();  // Expected to fail.
-  GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";
-
-  printf("\nPASS\n");
-  return 0;
-}
-
-#else
-TEST(StressTest,
-     DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
-}
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif  // GTEST_IS_THREADSAFE
diff --git a/third_party/googletest/googletest/test/gtest_test_macro_stack_footprint_test.cc b/third_party/googletest/googletest/test/gtest_test_macro_stack_footprint_test.cc
deleted file mode 100644
index a48db05..0000000
--- a/third_party/googletest/googletest/test/gtest_test_macro_stack_footprint_test.cc
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Each TEST() expands to some static registration logic.  GCC puts all
-// such static initialization logic for a translation unit in a common,
-// internal function.  Since Google's build system restricts how much
-// stack space a function can use, there's a limit on how many TEST()s
-// one can put in a single C++ test file.  This test ensures that a large
-// number of TEST()s can be defined in the same translation unit.
-
-#include "gtest/gtest.h"
-
-// This macro defines 10 dummy tests.
-#define TEN_TESTS_(test_case_name) \
-  TEST(test_case_name, T0) {} \
-  TEST(test_case_name, T1) {} \
-  TEST(test_case_name, T2) {} \
-  TEST(test_case_name, T3) {} \
-  TEST(test_case_name, T4) {} \
-  TEST(test_case_name, T5) {} \
-  TEST(test_case_name, T6) {} \
-  TEST(test_case_name, T7) {} \
-  TEST(test_case_name, T8) {} \
-  TEST(test_case_name, T9) {}
-
-// This macro defines 100 dummy tests.
-#define HUNDRED_TESTS_(test_case_name_prefix) \
-  TEN_TESTS_(test_case_name_prefix ## 0) \
-  TEN_TESTS_(test_case_name_prefix ## 1) \
-  TEN_TESTS_(test_case_name_prefix ## 2) \
-  TEN_TESTS_(test_case_name_prefix ## 3) \
-  TEN_TESTS_(test_case_name_prefix ## 4) \
-  TEN_TESTS_(test_case_name_prefix ## 5) \
-  TEN_TESTS_(test_case_name_prefix ## 6) \
-  TEN_TESTS_(test_case_name_prefix ## 7) \
-  TEN_TESTS_(test_case_name_prefix ## 8) \
-  TEN_TESTS_(test_case_name_prefix ## 9)
-
-// This macro defines 1000 dummy tests.
-#define THOUSAND_TESTS_(test_case_name_prefix) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 0) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 1) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 2) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 3) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 4) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 5) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 6) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 7) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 8) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 9)
-
-// Ensures that we can define 1000 TEST()s in the same translation
-// unit.
-THOUSAND_TESTS_(T)
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // We don't actually need to run the dummy tests - the purpose is to
-  // ensure that they compile.
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/gtest_test_utils.py b/third_party/googletest/googletest/test/gtest_test_utils.py
deleted file mode 100755
index d0c2446..0000000
--- a/third_party/googletest/googletest/test/gtest_test_utils.py
+++ /dev/null
@@ -1,312 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for Google C++ Testing and Mocking Framework."""
-# Suppresses the 'Import not at the top of the file' lint complaint.
-# pylint: disable-msg=C6204
-
-import os
-import sys
-
-IS_WINDOWS = os.name == 'nt'
-IS_CYGWIN = os.name == 'posix' and 'CYGWIN' in os.uname()[0]
-IS_OS2 = os.name == 'os2'
-
-import atexit
-import shutil
-import tempfile
-import unittest as _test_module
-
-try:
-  import subprocess
-  _SUBPROCESS_MODULE_AVAILABLE = True
-except:
-  import popen2
-  _SUBPROCESS_MODULE_AVAILABLE = False
-# pylint: enable-msg=C6204
-
-GTEST_OUTPUT_VAR_NAME = 'GTEST_OUTPUT'
-
-# The environment variable for specifying the path to the premature-exit file.
-PREMATURE_EXIT_FILE_ENV_VAR = 'TEST_PREMATURE_EXIT_FILE'
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets/unsets an environment variable to a given value."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-# Here we expose a class from a particular module, depending on the
-# environment. The comment suppresses the 'Invalid variable name' lint
-# complaint.
-TestCase = _test_module.TestCase  # pylint: disable=C6409
-
-# Initially maps a flag to its default value. After
-# _ParseAndStripGTestFlags() is called, maps a flag to its actual value.
-_flag_map = {'source_dir': os.path.dirname(sys.argv[0]),
-             'build_dir': os.path.dirname(sys.argv[0])}
-_gtest_flags_are_parsed = False
-
-
-def _ParseAndStripGTestFlags(argv):
-  """Parses and strips Google Test flags from argv.  This is idempotent."""
-
-  # Suppresses the lint complaint about a global variable since we need it
-  # here to maintain module-wide state.
-  global _gtest_flags_are_parsed  # pylint: disable=W0603
-  if _gtest_flags_are_parsed:
-    return
-
-  _gtest_flags_are_parsed = True
-  for flag in _flag_map:
-    # The environment variable overrides the default value.
-    if flag.upper() in os.environ:
-      _flag_map[flag] = os.environ[flag.upper()]
-
-    # The command line flag overrides the environment variable.
-    i = 1  # Skips the program name.
-    while i < len(argv):
-      prefix = '--' + flag + '='
-      if argv[i].startswith(prefix):
-        _flag_map[flag] = argv[i][len(prefix):]
-        del argv[i]
-        break
-      else:
-        # We don't increment i in case we just found a --gtest_* flag
-        # and removed it from argv.
-        i += 1
-
-
-def GetFlag(flag):
-  """Returns the value of the given flag."""
-
-  # In case GetFlag() is called before Main(), we always call
-  # _ParseAndStripGTestFlags() here to make sure the --gtest_* flags
-  # are parsed.
-  _ParseAndStripGTestFlags(sys.argv)
-
-  return _flag_map[flag]
-
-
-def GetSourceDir():
-  """Returns the absolute path of the directory where the .py files are."""
-
-  return os.path.abspath(GetFlag('source_dir'))
-
-
-def GetBuildDir():
-  """Returns the absolute path of the directory where the test binaries are."""
-
-  return os.path.abspath(GetFlag('build_dir'))
-
-
-_temp_dir = None
-
-def _RemoveTempDir():
-  if _temp_dir:
-    shutil.rmtree(_temp_dir, ignore_errors=True)
-
-atexit.register(_RemoveTempDir)
-
-
-def GetTempDir():
-  global _temp_dir
-  if not _temp_dir:
-    _temp_dir = tempfile.mkdtemp()
-  return _temp_dir
-
-
-def GetTestExecutablePath(executable_name, build_dir=None):
-  """Returns the absolute path of the test binary given its name.
-
-  The function will print a message and abort the program if the resulting file
-  doesn't exist.
-
-  Args:
-    executable_name: name of the test binary that the test script runs.
-    build_dir:       directory where to look for executables, by default
-                     the result of GetBuildDir().
-
-  Returns:
-    The absolute path of the test binary.
-  """
-
-  path = os.path.abspath(os.path.join(build_dir or GetBuildDir(),
-                                      executable_name))
-  if (IS_WINDOWS or IS_CYGWIN or IS_OS2) and not path.endswith('.exe'):
-    path += '.exe'
-
-  if not os.path.exists(path):
-    message = (
-        'Unable to find the test binary "%s". Please make sure to provide\n'
-        'a path to the binary via the --build_dir flag or the BUILD_DIR\n'
-        'environment variable.' % path)
-    print >> sys.stderr, message
-    sys.exit(1)
-
-  return path
-
-
-def GetExitStatus(exit_code):
-  """Returns the argument to exit(), or -1 if exit() wasn't called.
-
-  Args:
-    exit_code: the result value of os.system(command).
-  """
-
-  if os.name == 'nt':
-    # On Windows, os.WEXITSTATUS() doesn't work and os.system() returns
-    # the argument to exit() directly.
-    return exit_code
-  else:
-    # On Unix, os.WEXITSTATUS() must be used to extract the exit status
-    # from the result of os.system().
-    if os.WIFEXITED(exit_code):
-      return os.WEXITSTATUS(exit_code)
-    else:
-      return -1
-
-
-class Subprocess:
-  def __init__(self, command, working_dir=None, capture_stderr=True, env=None):
-    """Changes into a specified directory, if provided, and executes a command.
-
-    Restores the old directory afterwards.
-
-    Args:
-      command:        The command to run, in the form of sys.argv.
-      working_dir:    The directory to change into.
-      capture_stderr: Determines whether to capture stderr in the output member
-                      or to discard it.
-      env:            Dictionary with environment to pass to the subprocess.
-
-    Returns:
-      An object that represents outcome of the executed process. It has the
-      following attributes:
-        terminated_by_signal   True if and only if the child process has been
-                               terminated by a signal.
-        exited                 True if and only if the child process exited
-                               normally.
-        exit_code              The code with which the child process exited.
-        output                 Child process's stdout and stderr output
-                               combined in a string.
-    """
-
-    # The subprocess module is the preferrable way of running programs
-    # since it is available and behaves consistently on all platforms,
-    # including Windows. But it is only available starting in python 2.4.
-    # In earlier python versions, we revert to the popen2 module, which is
-    # available in python 2.0 and later but doesn't provide required
-    # functionality (Popen4) under Windows. This allows us to support Mac
-    # OS X 10.4 Tiger, which has python 2.3 installed.
-    if _SUBPROCESS_MODULE_AVAILABLE:
-      if capture_stderr:
-        stderr = subprocess.STDOUT
-      else:
-        stderr = subprocess.PIPE
-
-      p = subprocess.Popen(command,
-                           stdout=subprocess.PIPE, stderr=stderr,
-                           cwd=working_dir, universal_newlines=True, env=env)
-      # communicate returns a tuple with the file object for the child's
-      # output.
-      self.output = p.communicate()[0]
-      self._return_code = p.returncode
-    else:
-      old_dir = os.getcwd()
-
-      def _ReplaceEnvDict(dest, src):
-        # Changes made by os.environ.clear are not inheritable by child
-        # processes until Python 2.6. To produce inheritable changes we have
-        # to delete environment items with the del statement.
-        for key in dest.keys():
-          del dest[key]
-        dest.update(src)
-
-      # When 'env' is not None, backup the environment variables and replace
-      # them with the passed 'env'. When 'env' is None, we simply use the
-      # current 'os.environ' for compatibility with the subprocess.Popen
-      # semantics used above.
-      if env is not None:
-        old_environ = os.environ.copy()
-        _ReplaceEnvDict(os.environ, env)
-
-      try:
-        if working_dir is not None:
-          os.chdir(working_dir)
-        if capture_stderr:
-          p = popen2.Popen4(command)
-        else:
-          p = popen2.Popen3(command)
-        p.tochild.close()
-        self.output = p.fromchild.read()
-        ret_code = p.wait()
-      finally:
-        os.chdir(old_dir)
-
-        # Restore the old environment variables
-        # if they were replaced.
-        if env is not None:
-          _ReplaceEnvDict(os.environ, old_environ)
-
-      # Converts ret_code to match the semantics of
-      # subprocess.Popen.returncode.
-      if os.WIFSIGNALED(ret_code):
-        self._return_code = -os.WTERMSIG(ret_code)
-      else:  # os.WIFEXITED(ret_code) should return True here.
-        self._return_code = os.WEXITSTATUS(ret_code)
-
-    if bool(self._return_code & 0x80000000):
-      self.terminated_by_signal = True
-      self.exited = False
-    else:
-      self.terminated_by_signal = False
-      self.exited = True
-      self.exit_code = self._return_code
-
-
-def Main():
-  """Runs the unit test."""
-
-  # We must call _ParseAndStripGTestFlags() before calling
-  # unittest.main().  Otherwise the latter will be confused by the
-  # --gtest_* flags.
-  _ParseAndStripGTestFlags(sys.argv)
-  # The tested binaries should not be writing XML output files unless the
-  # script explicitly instructs them to.
-  if GTEST_OUTPUT_VAR_NAME in os.environ:
-    del os.environ[GTEST_OUTPUT_VAR_NAME]
-
-  _test_module.main()
diff --git a/third_party/googletest/googletest/test/gtest_testbridge_test.py b/third_party/googletest/googletest/test/gtest_testbridge_test.py
deleted file mode 100755
index 87ffad7..0000000
--- a/third_party/googletest/googletest/test/gtest_testbridge_test.py
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2018 Google LLC. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Verifies that Google Test uses filter provided via testbridge."""
-
-import os
-
-import gtest_test_utils
-
-binary_name = 'gtest_testbridge_test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-TESTBRIDGE_NAME = 'TESTBRIDGE_TEST_ONLY'
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-class GTestTestFilterTest(gtest_test_utils.TestCase):
-
-  def testTestExecutionIsFiltered(self):
-    """Tests that the test filter is picked up from the testbridge env var."""
-    subprocess_env = os.environ.copy()
-
-    subprocess_env[TESTBRIDGE_NAME] = '*.TestThatSucceeds'
-    p = gtest_test_utils.Subprocess(COMMAND, env=subprocess_env)
-
-    self.assertEquals(0, p.exit_code)
-
-    Assert('filter = *.TestThatSucceeds' in p.output)
-    Assert('[       OK ] TestFilterTest.TestThatSucceeds' in p.output)
-    Assert('[  PASSED  ] 1 test.' in p.output)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_testbridge_test_.cc b/third_party/googletest/googletest/test/gtest_testbridge_test_.cc
deleted file mode 100644
index 24617b2..0000000
--- a/third_party/googletest/googletest/test/gtest_testbridge_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2018, Google LLC.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This program is meant to be run by gtest_test_filter_test.py.  Do not run
-// it directly.
-
-#include "gtest/gtest.h"
-
-// These tests are used to detect if filtering is working. Only
-// 'TestThatSucceeds' should ever run.
-
-TEST(TestFilterTest, TestThatSucceeds) {}
-
-TEST(TestFilterTest, TestThatFails) {
-  ASSERT_TRUE(false) << "This test should never be run.";
-}
diff --git a/third_party/googletest/googletest/test/gtest_throw_on_failure_ex_test.cc b/third_party/googletest/googletest/test/gtest_throw_on_failure_ex_test.cc
deleted file mode 100644
index 1d95adb..0000000
--- a/third_party/googletest/googletest/test/gtest_throw_on_failure_ex_test.cc
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's throw-on-failure mode with exceptions enabled.
-
-#include "gtest/gtest.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdexcept>
-
-// Prints the given failure message and exits the program with
-// non-zero.  We use this instead of a Google Test assertion to
-// indicate a failure, as the latter is been tested and cannot be
-// relied on.
-void Fail(const char* msg) {
-  printf("FAILURE: %s\n", msg);
-  fflush(stdout);
-  exit(1);
-}
-
-// Tests that an assertion failure throws a subclass of
-// std::runtime_error.
-void TestFailureThrowsRuntimeError() {
-  testing::GTEST_FLAG(throw_on_failure) = true;
-
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 3);
-  } catch(...) {
-    Fail("A successful assertion wrongfully threw.");
-  }
-
-  // A failed assertion should throw a subclass of std::runtime_error.
-  try {
-    EXPECT_EQ(2, 3) << "Expected failure";
-  } catch(const std::runtime_error& e) {
-    if (strstr(e.what(), "Expected failure") != nullptr) return;
-
-    printf("%s",
-           "A failed assertion did throw an exception of the right type, "
-           "but the message is incorrect.  Instead of containing \"Expected "
-           "failure\", it is:\n");
-    Fail(e.what());
-  } catch(...) {
-    Fail("A failed assertion threw the wrong type of exception.");
-  }
-  Fail("A failed assertion should've thrown but didn't.");
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // We want to ensure that people can use Google Test assertions in
-  // other testing frameworks, as long as they initialize Google Test
-  // properly and set the thrown-on-failure mode.  Therefore, we don't
-  // use Google Test's constructs for defining and running tests
-  // (e.g. TEST and RUN_ALL_TESTS) here.
-
-  TestFailureThrowsRuntimeError();
-  return 0;
-}
diff --git a/third_party/googletest/googletest/test/gtest_unittest.cc b/third_party/googletest/googletest/test/gtest_unittest.cc
deleted file mode 100644
index 1730e8b..0000000
--- a/third_party/googletest/googletest/test/gtest_unittest.cc
+++ /dev/null
@@ -1,7784 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-
-// Verifies that the command line flag variables can be accessed in
-// code once "gtest.h" has been #included.
-// Do not move it after other gtest #includes.
-TEST(CommandLineFlagsTest, CanBeAccessedInCodeOnceGTestHIsIncluded) {
-  bool dummy = testing::GTEST_FLAG(also_run_disabled_tests) ||
-               testing::GTEST_FLAG(break_on_failure) ||
-               testing::GTEST_FLAG(catch_exceptions) ||
-               testing::GTEST_FLAG(color) != "unknown" ||
-               testing::GTEST_FLAG(fail_fast) ||
-               testing::GTEST_FLAG(filter) != "unknown" ||
-               testing::GTEST_FLAG(list_tests) ||
-               testing::GTEST_FLAG(output) != "unknown" ||
-               testing::GTEST_FLAG(brief) || testing::GTEST_FLAG(print_time) ||
-               testing::GTEST_FLAG(random_seed) ||
-               testing::GTEST_FLAG(repeat) > 0 ||
-               testing::GTEST_FLAG(show_internal_stack_frames) ||
-               testing::GTEST_FLAG(shuffle) ||
-               testing::GTEST_FLAG(stack_trace_depth) > 0 ||
-               testing::GTEST_FLAG(stream_result_to) != "unknown" ||
-               testing::GTEST_FLAG(throw_on_failure);
-  EXPECT_TRUE(dummy || !dummy);  // Suppresses warning that dummy is unused.
-}
-
-#include <limits.h>  // For INT_MAX.
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <cstdint>
-#include <map>
-#include <ostream>
-#include <string>
-#include <type_traits>
-#include <unordered_set>
-#include <vector>
-
-#include "gtest/gtest-spi.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-class StreamingListenerTest : public Test {
- public:
-  class FakeSocketWriter : public StreamingListener::AbstractSocketWriter {
-   public:
-    // Sends a string to the socket.
-    void Send(const std::string& message) override { output_ += message; }
-
-    std::string output_;
-  };
-
-  StreamingListenerTest()
-      : fake_sock_writer_(new FakeSocketWriter),
-        streamer_(fake_sock_writer_),
-        test_info_obj_("FooTest", "Bar", nullptr, nullptr,
-                       CodeLocation(__FILE__, __LINE__), nullptr, nullptr) {}
-
- protected:
-  std::string* output() { return &(fake_sock_writer_->output_); }
-
-  FakeSocketWriter* const fake_sock_writer_;
-  StreamingListener streamer_;
-  UnitTest unit_test_;
-  TestInfo test_info_obj_;  // The name test_info_ was taken by testing::Test.
-};
-
-TEST_F(StreamingListenerTest, OnTestProgramEnd) {
-  *output() = "";
-  streamer_.OnTestProgramEnd(unit_test_);
-  EXPECT_EQ("event=TestProgramEnd&passed=1\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestIterationEnd) {
-  *output() = "";
-  streamer_.OnTestIterationEnd(unit_test_, 42);
-  EXPECT_EQ("event=TestIterationEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestCaseStart) {
-  *output() = "";
-  streamer_.OnTestCaseStart(TestCase("FooTest", "Bar", nullptr, nullptr));
-  EXPECT_EQ("event=TestCaseStart&name=FooTest\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestCaseEnd) {
-  *output() = "";
-  streamer_.OnTestCaseEnd(TestCase("FooTest", "Bar", nullptr, nullptr));
-  EXPECT_EQ("event=TestCaseEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestStart) {
-  *output() = "";
-  streamer_.OnTestStart(test_info_obj_);
-  EXPECT_EQ("event=TestStart&name=Bar\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestEnd) {
-  *output() = "";
-  streamer_.OnTestEnd(test_info_obj_);
-  EXPECT_EQ("event=TestEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestPartResult) {
-  *output() = "";
-  streamer_.OnTestPartResult(TestPartResult(
-      TestPartResult::kFatalFailure, "foo.cc", 42, "failed=\n&%"));
-
-  // Meta characters in the failure message should be properly escaped.
-  EXPECT_EQ(
-      "event=TestPartResult&file=foo.cc&line=42&message=failed%3D%0A%26%25\n",
-      *output());
-}
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Provides access to otherwise private parts of the TestEventListeners class
-// that are needed to test it.
-class TestEventListenersAccessor {
- public:
-  static TestEventListener* GetRepeater(TestEventListeners* listeners) {
-    return listeners->repeater();
-  }
-
-  static void SetDefaultResultPrinter(TestEventListeners* listeners,
-                                      TestEventListener* listener) {
-    listeners->SetDefaultResultPrinter(listener);
-  }
-  static void SetDefaultXmlGenerator(TestEventListeners* listeners,
-                                     TestEventListener* listener) {
-    listeners->SetDefaultXmlGenerator(listener);
-  }
-
-  static bool EventForwardingEnabled(const TestEventListeners& listeners) {
-    return listeners.EventForwardingEnabled();
-  }
-
-  static void SuppressEventForwarding(TestEventListeners* listeners) {
-    listeners->SuppressEventForwarding();
-  }
-};
-
-class UnitTestRecordPropertyTestHelper : public Test {
- protected:
-  UnitTestRecordPropertyTestHelper() {}
-
-  // Forwards to UnitTest::RecordProperty() to bypass access controls.
-  void UnitTestRecordProperty(const char* key, const std::string& value) {
-    unit_test_.RecordProperty(key, value);
-  }
-
-  UnitTest unit_test_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-using testing::AssertionFailure;
-using testing::AssertionResult;
-using testing::AssertionSuccess;
-using testing::DoubleLE;
-using testing::EmptyTestEventListener;
-using testing::Environment;
-using testing::FloatLE;
-using testing::GTEST_FLAG(also_run_disabled_tests);
-using testing::GTEST_FLAG(break_on_failure);
-using testing::GTEST_FLAG(catch_exceptions);
-using testing::GTEST_FLAG(color);
-using testing::GTEST_FLAG(death_test_use_fork);
-using testing::GTEST_FLAG(fail_fast);
-using testing::GTEST_FLAG(filter);
-using testing::GTEST_FLAG(list_tests);
-using testing::GTEST_FLAG(output);
-using testing::GTEST_FLAG(brief);
-using testing::GTEST_FLAG(print_time);
-using testing::GTEST_FLAG(random_seed);
-using testing::GTEST_FLAG(repeat);
-using testing::GTEST_FLAG(show_internal_stack_frames);
-using testing::GTEST_FLAG(shuffle);
-using testing::GTEST_FLAG(stack_trace_depth);
-using testing::GTEST_FLAG(stream_result_to);
-using testing::GTEST_FLAG(throw_on_failure);
-using testing::IsNotSubstring;
-using testing::IsSubstring;
-using testing::kMaxStackTraceDepth;
-using testing::Message;
-using testing::ScopedFakeTestPartResultReporter;
-using testing::StaticAssertTypeEq;
-using testing::Test;
-using testing::TestEventListeners;
-using testing::TestInfo;
-using testing::TestPartResult;
-using testing::TestPartResultArray;
-using testing::TestProperty;
-using testing::TestResult;
-using testing::TestSuite;
-using testing::TimeInMillis;
-using testing::UnitTest;
-using testing::internal::AlwaysFalse;
-using testing::internal::AlwaysTrue;
-using testing::internal::AppendUserMessage;
-using testing::internal::ArrayAwareFind;
-using testing::internal::ArrayEq;
-using testing::internal::CodePointToUtf8;
-using testing::internal::CopyArray;
-using testing::internal::CountIf;
-using testing::internal::EqFailure;
-using testing::internal::FloatingPoint;
-using testing::internal::ForEach;
-using testing::internal::FormatEpochTimeInMillisAsIso8601;
-using testing::internal::FormatTimeInMillisAsSeconds;
-using testing::internal::GetCurrentOsStackTraceExceptTop;
-using testing::internal::GetElementOr;
-using testing::internal::GetNextRandomSeed;
-using testing::internal::GetRandomSeedFromFlag;
-using testing::internal::GetTestTypeId;
-using testing::internal::GetTimeInMillis;
-using testing::internal::GetTypeId;
-using testing::internal::GetUnitTestImpl;
-using testing::internal::GTestFlagSaver;
-using testing::internal::HasDebugStringAndShortDebugString;
-using testing::internal::Int32FromEnvOrDie;
-using testing::internal::IsContainer;
-using testing::internal::IsContainerTest;
-using testing::internal::IsNotContainer;
-using testing::internal::kMaxRandomSeed;
-using testing::internal::kTestTypeIdInGoogleTest;
-using testing::internal::NativeArray;
-using testing::internal::OsStackTraceGetter;
-using testing::internal::OsStackTraceGetterInterface;
-using testing::internal::ParseInt32Flag;
-using testing::internal::RelationToSourceCopy;
-using testing::internal::RelationToSourceReference;
-using testing::internal::ShouldRunTestOnShard;
-using testing::internal::ShouldShard;
-using testing::internal::ShouldUseColor;
-using testing::internal::Shuffle;
-using testing::internal::ShuffleRange;
-using testing::internal::SkipPrefix;
-using testing::internal::StreamableToString;
-using testing::internal::String;
-using testing::internal::TestEventListenersAccessor;
-using testing::internal::TestResultAccessor;
-using testing::internal::UnitTestImpl;
-using testing::internal::WideStringToUtf8;
-using testing::internal::edit_distance::CalculateOptimalEdits;
-using testing::internal::edit_distance::CreateUnifiedDiff;
-using testing::internal::edit_distance::EditType;
-
-#if GTEST_HAS_STREAM_REDIRECTION
-using testing::internal::CaptureStdout;
-using testing::internal::GetCapturedStdout;
-#endif
-
-#if GTEST_IS_THREADSAFE
-using testing::internal::ThreadWithParam;
-#endif
-
-class TestingVector : public std::vector<int> {
-};
-
-::std::ostream& operator<<(::std::ostream& os,
-                           const TestingVector& vector) {
-  os << "{ ";
-  for (size_t i = 0; i < vector.size(); i++) {
-    os << vector[i] << " ";
-  }
-  os << "}";
-  return os;
-}
-
-// This line tests that we can define tests in an unnamed namespace.
-namespace {
-
-TEST(GetRandomSeedFromFlagTest, HandlesZero) {
-  const int seed = GetRandomSeedFromFlag(0);
-  EXPECT_LE(1, seed);
-  EXPECT_LE(seed, static_cast<int>(kMaxRandomSeed));
-}
-
-TEST(GetRandomSeedFromFlagTest, PreservesValidSeed) {
-  EXPECT_EQ(1, GetRandomSeedFromFlag(1));
-  EXPECT_EQ(2, GetRandomSeedFromFlag(2));
-  EXPECT_EQ(kMaxRandomSeed - 1, GetRandomSeedFromFlag(kMaxRandomSeed - 1));
-  EXPECT_EQ(static_cast<int>(kMaxRandomSeed),
-            GetRandomSeedFromFlag(kMaxRandomSeed));
-}
-
-TEST(GetRandomSeedFromFlagTest, NormalizesInvalidSeed) {
-  const int seed1 = GetRandomSeedFromFlag(-1);
-  EXPECT_LE(1, seed1);
-  EXPECT_LE(seed1, static_cast<int>(kMaxRandomSeed));
-
-  const int seed2 = GetRandomSeedFromFlag(kMaxRandomSeed + 1);
-  EXPECT_LE(1, seed2);
-  EXPECT_LE(seed2, static_cast<int>(kMaxRandomSeed));
-}
-
-TEST(GetNextRandomSeedTest, WorksForValidInput) {
-  EXPECT_EQ(2, GetNextRandomSeed(1));
-  EXPECT_EQ(3, GetNextRandomSeed(2));
-  EXPECT_EQ(static_cast<int>(kMaxRandomSeed),
-            GetNextRandomSeed(kMaxRandomSeed - 1));
-  EXPECT_EQ(1, GetNextRandomSeed(kMaxRandomSeed));
-
-  // We deliberately don't test GetNextRandomSeed() with invalid
-  // inputs, as that requires death tests, which are expensive.  This
-  // is fine as GetNextRandomSeed() is internal and has a
-  // straightforward definition.
-}
-
-static void ClearCurrentTestPartResults() {
-  TestResultAccessor::ClearTestPartResults(
-      GetUnitTestImpl()->current_test_result());
-}
-
-// Tests GetTypeId.
-
-TEST(GetTypeIdTest, ReturnsSameValueForSameType) {
-  EXPECT_EQ(GetTypeId<int>(), GetTypeId<int>());
-  EXPECT_EQ(GetTypeId<Test>(), GetTypeId<Test>());
-}
-
-class SubClassOfTest : public Test {};
-class AnotherSubClassOfTest : public Test {};
-
-TEST(GetTypeIdTest, ReturnsDifferentValuesForDifferentTypes) {
-  EXPECT_NE(GetTypeId<int>(), GetTypeId<const int>());
-  EXPECT_NE(GetTypeId<int>(), GetTypeId<char>());
-  EXPECT_NE(GetTypeId<int>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<SubClassOfTest>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<AnotherSubClassOfTest>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<AnotherSubClassOfTest>(), GetTypeId<SubClassOfTest>());
-}
-
-// Verifies that GetTestTypeId() returns the same value, no matter it
-// is called from inside Google Test or outside of it.
-TEST(GetTestTypeIdTest, ReturnsTheSameValueInsideOrOutsideOfGoogleTest) {
-  EXPECT_EQ(kTestTypeIdInGoogleTest, GetTestTypeId());
-}
-
-// Tests CanonicalizeForStdLibVersioning.
-
-using ::testing::internal::CanonicalizeForStdLibVersioning;
-
-TEST(CanonicalizeForStdLibVersioning, LeavesUnversionedNamesUnchanged) {
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::_"));
-  EXPECT_EQ("std::__foo", CanonicalizeForStdLibVersioning("std::__foo"));
-  EXPECT_EQ("gtl::__1::x", CanonicalizeForStdLibVersioning("gtl::__1::x"));
-  EXPECT_EQ("__1::x", CanonicalizeForStdLibVersioning("__1::x"));
-  EXPECT_EQ("::__1::x", CanonicalizeForStdLibVersioning("::__1::x"));
-}
-
-TEST(CanonicalizeForStdLibVersioning, ElidesDoubleUnderNames) {
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::__1::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__1::_"));
-
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::__g::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__g::_"));
-
-  EXPECT_EQ("std::bind",
-            CanonicalizeForStdLibVersioning("std::__google::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__google::_"));
-}
-
-// Tests FormatTimeInMillisAsSeconds().
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsZero) {
-  EXPECT_EQ("0", FormatTimeInMillisAsSeconds(0));
-}
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsPositiveNumber) {
-  EXPECT_EQ("0.003", FormatTimeInMillisAsSeconds(3));
-  EXPECT_EQ("0.01", FormatTimeInMillisAsSeconds(10));
-  EXPECT_EQ("0.2", FormatTimeInMillisAsSeconds(200));
-  EXPECT_EQ("1.2", FormatTimeInMillisAsSeconds(1200));
-  EXPECT_EQ("3", FormatTimeInMillisAsSeconds(3000));
-}
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsNegativeNumber) {
-  EXPECT_EQ("-0.003", FormatTimeInMillisAsSeconds(-3));
-  EXPECT_EQ("-0.01", FormatTimeInMillisAsSeconds(-10));
-  EXPECT_EQ("-0.2", FormatTimeInMillisAsSeconds(-200));
-  EXPECT_EQ("-1.2", FormatTimeInMillisAsSeconds(-1200));
-  EXPECT_EQ("-3", FormatTimeInMillisAsSeconds(-3000));
-}
-
-// Tests FormatEpochTimeInMillisAsIso8601().  The correctness of conversion
-// for particular dates below was verified in Python using
-// datetime.datetime.fromutctimestamp(<timetamp>/1000).
-
-// FormatEpochTimeInMillisAsIso8601 depends on the current timezone, so we
-// have to set up a particular timezone to obtain predictable results.
-class FormatEpochTimeInMillisAsIso8601Test : public Test {
- public:
-  // On Cygwin, GCC doesn't allow unqualified integer literals to exceed
-  // 32 bits, even when 64-bit integer types are available.  We have to
-  // force the constants to have a 64-bit type here.
-  static const TimeInMillis kMillisPerSec = 1000;
-
- private:
-  void SetUp() override {
-    saved_tz_ = nullptr;
-
-    GTEST_DISABLE_MSC_DEPRECATED_PUSH_(/* getenv, strdup: deprecated */)
-    if (getenv("TZ"))
-      saved_tz_ = strdup(getenv("TZ"));
-    GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-    // Set up the time zone for FormatEpochTimeInMillisAsIso8601 to use.  We
-    // cannot use the local time zone because the function's output depends
-    // on the time zone.
-    SetTimeZone("UTC+00");
-  }
-
-  void TearDown() override {
-    SetTimeZone(saved_tz_);
-    free(const_cast<char*>(saved_tz_));
-    saved_tz_ = nullptr;
-  }
-
-  static void SetTimeZone(const char* time_zone) {
-    // tzset() distinguishes between the TZ variable being present and empty
-    // and not being present, so we have to consider the case of time_zone
-    // being NULL.
-#if _MSC_VER || GTEST_OS_WINDOWS_MINGW
-    // ...Unless it's MSVC, whose standard library's _putenv doesn't
-    // distinguish between an empty and a missing variable.
-    const std::string env_var =
-        std::string("TZ=") + (time_zone ? time_zone : "");
-    _putenv(env_var.c_str());
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996 /* deprecated function */)
-    tzset();
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#else
-    if (time_zone) {
-      setenv(("TZ"), time_zone, 1);
-    } else {
-      unsetenv("TZ");
-    }
-    tzset();
-#endif
-  }
-
-  const char* saved_tz_;
-};
-
-const TimeInMillis FormatEpochTimeInMillisAsIso8601Test::kMillisPerSec;
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsTwoDigitSegments) {
-  EXPECT_EQ("2011-10-31T18:52:42.000",
-            FormatEpochTimeInMillisAsIso8601(1320087162 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, IncludesMillisecondsAfterDot) {
-  EXPECT_EQ(
-      "2011-10-31T18:52:42.234",
-      FormatEpochTimeInMillisAsIso8601(1320087162 * kMillisPerSec + 234));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsLeadingZeroes) {
-  EXPECT_EQ("2011-09-03T05:07:02.000",
-            FormatEpochTimeInMillisAsIso8601(1315026422 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, Prints24HourTime) {
-  EXPECT_EQ("2011-09-28T17:08:22.000",
-            FormatEpochTimeInMillisAsIso8601(1317229702 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsEpochStart) {
-  EXPECT_EQ("1970-01-01T00:00:00.000", FormatEpochTimeInMillisAsIso8601(0));
-}
-
-# ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-#  pragma option push -w-ccc -w-rch
-# endif
-
-// Tests that the LHS of EXPECT_EQ or ASSERT_EQ can be used as a null literal
-// when the RHS is a pointer type.
-TEST(NullLiteralTest, LHSAllowsNullLiterals) {
-  EXPECT_EQ(0, static_cast<void*>(nullptr));     // NOLINT
-  ASSERT_EQ(0, static_cast<void*>(nullptr));     // NOLINT
-  EXPECT_EQ(NULL, static_cast<void*>(nullptr));  // NOLINT
-  ASSERT_EQ(NULL, static_cast<void*>(nullptr));  // NOLINT
-  EXPECT_EQ(nullptr, static_cast<void*>(nullptr));
-  ASSERT_EQ(nullptr, static_cast<void*>(nullptr));
-
-  const int* const p = nullptr;
-  EXPECT_EQ(0, p);     // NOLINT
-  ASSERT_EQ(0, p);     // NOLINT
-  EXPECT_EQ(NULL, p);  // NOLINT
-  ASSERT_EQ(NULL, p);  // NOLINT
-  EXPECT_EQ(nullptr, p);
-  ASSERT_EQ(nullptr, p);
-}
-
-struct ConvertToAll {
-  template <typename T>
-  operator T() const {  // NOLINT
-    return T();
-  }
-};
-
-struct ConvertToPointer {
-  template <class T>
-  operator T*() const {  // NOLINT
-    return nullptr;
-  }
-};
-
-struct ConvertToAllButNoPointers {
-  template <typename T,
-            typename std::enable_if<!std::is_pointer<T>::value, int>::type = 0>
-  operator T() const {  // NOLINT
-    return T();
-  }
-};
-
-struct MyType {};
-inline bool operator==(MyType const&, MyType const&) { return true; }
-
-TEST(NullLiteralTest, ImplicitConversion) {
-  EXPECT_EQ(ConvertToPointer{}, static_cast<void*>(nullptr));
-#if !defined(__GNUC__) || defined(__clang__)
-  // Disabled due to GCC bug gcc.gnu.org/PR89580
-  EXPECT_EQ(ConvertToAll{}, static_cast<void*>(nullptr));
-#endif
-  EXPECT_EQ(ConvertToAll{}, MyType{});
-  EXPECT_EQ(ConvertToAllButNoPointers{}, MyType{});
-}
-
-#ifdef __clang__
-#pragma clang diagnostic push
-#if __has_warning("-Wzero-as-null-pointer-constant")
-#pragma clang diagnostic error "-Wzero-as-null-pointer-constant"
-#endif
-#endif
-
-TEST(NullLiteralTest, NoConversionNoWarning) {
-  // Test that gtests detection and handling of null pointer constants
-  // doesn't trigger a warning when '0' isn't actually used as null.
-  EXPECT_EQ(0, 0);
-  ASSERT_EQ(0, 0);
-}
-
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-
-# ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them.
-#  pragma option pop
-# endif
-
-//
-// Tests CodePointToUtf8().
-
-// Tests that the NUL character L'\0' is encoded correctly.
-TEST(CodePointToUtf8Test, CanEncodeNul) {
-  EXPECT_EQ("", CodePointToUtf8(L'\0'));
-}
-
-// Tests that ASCII characters are encoded correctly.
-TEST(CodePointToUtf8Test, CanEncodeAscii) {
-  EXPECT_EQ("a", CodePointToUtf8(L'a'));
-  EXPECT_EQ("Z", CodePointToUtf8(L'Z'));
-  EXPECT_EQ("&", CodePointToUtf8(L'&'));
-  EXPECT_EQ("\x7F", CodePointToUtf8(L'\x7F'));
-}
-
-// Tests that Unicode code-points that have 8 to 11 bits are encoded
-// as 110xxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode8To11Bits) {
-  // 000 1101 0011 => 110-00011 10-010011
-  EXPECT_EQ("\xC3\x93", CodePointToUtf8(L'\xD3'));
-
-  // 101 0111 0110 => 110-10101 10-110110
-  // Some compilers (e.g., GCC on MinGW) cannot handle non-ASCII codepoints
-  // in wide strings and wide chars. In order to accommodate them, we have to
-  // introduce such character constants as integers.
-  EXPECT_EQ("\xD5\xB6",
-            CodePointToUtf8(static_cast<wchar_t>(0x576)));
-}
-
-// Tests that Unicode code-points that have 12 to 16 bits are encoded
-// as 1110xxxx 10xxxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode12To16Bits) {
-  // 0000 1000 1101 0011 => 1110-0000 10-100011 10-010011
-  EXPECT_EQ("\xE0\xA3\x93",
-            CodePointToUtf8(static_cast<wchar_t>(0x8D3)));
-
-  // 1100 0111 0100 1101 => 1110-1100 10-011101 10-001101
-  EXPECT_EQ("\xEC\x9D\x8D",
-            CodePointToUtf8(static_cast<wchar_t>(0xC74D)));
-}
-
-#if !GTEST_WIDE_STRING_USES_UTF16_
-// Tests in this group require a wchar_t to hold > 16 bits, and thus
-// are skipped on Windows, and Cygwin, where a wchar_t is
-// 16-bit wide. This code may not compile on those systems.
-
-// Tests that Unicode code-points that have 17 to 21 bits are encoded
-// as 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode17To21Bits) {
-  // 0 0001 0000 1000 1101 0011 => 11110-000 10-010000 10-100011 10-010011
-  EXPECT_EQ("\xF0\x90\xA3\x93", CodePointToUtf8(L'\x108D3'));
-
-  // 0 0001 0000 0100 0000 0000 => 11110-000 10-010000 10-010000 10-000000
-  EXPECT_EQ("\xF0\x90\x90\x80", CodePointToUtf8(L'\x10400'));
-
-  // 1 0000 1000 0110 0011 0100 => 11110-100 10-001000 10-011000 10-110100
-  EXPECT_EQ("\xF4\x88\x98\xB4", CodePointToUtf8(L'\x108634'));
-}
-
-// Tests that encoding an invalid code-point generates the expected result.
-TEST(CodePointToUtf8Test, CanEncodeInvalidCodePoint) {
-  EXPECT_EQ("(Invalid Unicode 0x1234ABCD)", CodePointToUtf8(L'\x1234ABCD'));
-}
-
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests WideStringToUtf8().
-
-// Tests that the NUL character L'\0' is encoded correctly.
-TEST(WideStringToUtf8Test, CanEncodeNul) {
-  EXPECT_STREQ("", WideStringToUtf8(L"", 0).c_str());
-  EXPECT_STREQ("", WideStringToUtf8(L"", -1).c_str());
-}
-
-// Tests that ASCII strings are encoded correctly.
-TEST(WideStringToUtf8Test, CanEncodeAscii) {
-  EXPECT_STREQ("a", WideStringToUtf8(L"a", 1).c_str());
-  EXPECT_STREQ("ab", WideStringToUtf8(L"ab", 2).c_str());
-  EXPECT_STREQ("a", WideStringToUtf8(L"a", -1).c_str());
-  EXPECT_STREQ("ab", WideStringToUtf8(L"ab", -1).c_str());
-}
-
-// Tests that Unicode code-points that have 8 to 11 bits are encoded
-// as 110xxxxx 10xxxxxx.
-TEST(WideStringToUtf8Test, CanEncode8To11Bits) {
-  // 000 1101 0011 => 110-00011 10-010011
-  EXPECT_STREQ("\xC3\x93", WideStringToUtf8(L"\xD3", 1).c_str());
-  EXPECT_STREQ("\xC3\x93", WideStringToUtf8(L"\xD3", -1).c_str());
-
-  // 101 0111 0110 => 110-10101 10-110110
-  const wchar_t s[] = { 0x576, '\0' };
-  EXPECT_STREQ("\xD5\xB6", WideStringToUtf8(s, 1).c_str());
-  EXPECT_STREQ("\xD5\xB6", WideStringToUtf8(s, -1).c_str());
-}
-
-// Tests that Unicode code-points that have 12 to 16 bits are encoded
-// as 1110xxxx 10xxxxxx 10xxxxxx.
-TEST(WideStringToUtf8Test, CanEncode12To16Bits) {
-  // 0000 1000 1101 0011 => 1110-0000 10-100011 10-010011
-  const wchar_t s1[] = { 0x8D3, '\0' };
-  EXPECT_STREQ("\xE0\xA3\x93", WideStringToUtf8(s1, 1).c_str());
-  EXPECT_STREQ("\xE0\xA3\x93", WideStringToUtf8(s1, -1).c_str());
-
-  // 1100 0111 0100 1101 => 1110-1100 10-011101 10-001101
-  const wchar_t s2[] = { 0xC74D, '\0' };
-  EXPECT_STREQ("\xEC\x9D\x8D", WideStringToUtf8(s2, 1).c_str());
-  EXPECT_STREQ("\xEC\x9D\x8D", WideStringToUtf8(s2, -1).c_str());
-}
-
-// Tests that the conversion stops when the function encounters \0 character.
-TEST(WideStringToUtf8Test, StopsOnNulCharacter) {
-  EXPECT_STREQ("ABC", WideStringToUtf8(L"ABC\0XYZ", 100).c_str());
-}
-
-// Tests that the conversion stops when the function reaches the limit
-// specified by the 'length' parameter.
-TEST(WideStringToUtf8Test, StopsWhenLengthLimitReached) {
-  EXPECT_STREQ("ABC", WideStringToUtf8(L"ABCDEF", 3).c_str());
-}
-
-#if !GTEST_WIDE_STRING_USES_UTF16_
-// Tests that Unicode code-points that have 17 to 21 bits are encoded
-// as 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx. This code may not compile
-// on the systems using UTF-16 encoding.
-TEST(WideStringToUtf8Test, CanEncode17To21Bits) {
-  // 0 0001 0000 1000 1101 0011 => 11110-000 10-010000 10-100011 10-010011
-  EXPECT_STREQ("\xF0\x90\xA3\x93", WideStringToUtf8(L"\x108D3", 1).c_str());
-  EXPECT_STREQ("\xF0\x90\xA3\x93", WideStringToUtf8(L"\x108D3", -1).c_str());
-
-  // 1 0000 1000 0110 0011 0100 => 11110-100 10-001000 10-011000 10-110100
-  EXPECT_STREQ("\xF4\x88\x98\xB4", WideStringToUtf8(L"\x108634", 1).c_str());
-  EXPECT_STREQ("\xF4\x88\x98\xB4", WideStringToUtf8(L"\x108634", -1).c_str());
-}
-
-// Tests that encoding an invalid code-point generates the expected result.
-TEST(WideStringToUtf8Test, CanEncodeInvalidCodePoint) {
-  EXPECT_STREQ("(Invalid Unicode 0xABCDFF)",
-               WideStringToUtf8(L"\xABCDFF", -1).c_str());
-}
-#else  // !GTEST_WIDE_STRING_USES_UTF16_
-// Tests that surrogate pairs are encoded correctly on the systems using
-// UTF-16 encoding in the wide strings.
-TEST(WideStringToUtf8Test, CanEncodeValidUtf16SUrrogatePairs) {
-  const wchar_t s[] = { 0xD801, 0xDC00, '\0' };
-  EXPECT_STREQ("\xF0\x90\x90\x80", WideStringToUtf8(s, -1).c_str());
-}
-
-// Tests that encoding an invalid UTF-16 surrogate pair
-// generates the expected result.
-TEST(WideStringToUtf8Test, CanEncodeInvalidUtf16SurrogatePair) {
-  // Leading surrogate is at the end of the string.
-  const wchar_t s1[] = { 0xD800, '\0' };
-  EXPECT_STREQ("\xED\xA0\x80", WideStringToUtf8(s1, -1).c_str());
-  // Leading surrogate is not followed by the trailing surrogate.
-  const wchar_t s2[] = { 0xD800, 'M', '\0' };
-  EXPECT_STREQ("\xED\xA0\x80M", WideStringToUtf8(s2, -1).c_str());
-  // Trailing surrogate appearas without a leading surrogate.
-  const wchar_t s3[] = { 0xDC00, 'P', 'Q', 'R', '\0' };
-  EXPECT_STREQ("\xED\xB0\x80PQR", WideStringToUtf8(s3, -1).c_str());
-}
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests that codepoint concatenation works correctly.
-#if !GTEST_WIDE_STRING_USES_UTF16_
-TEST(WideStringToUtf8Test, ConcatenatesCodepointsCorrectly) {
-  const wchar_t s[] = { 0x108634, 0xC74D, '\n', 0x576, 0x8D3, 0x108634, '\0'};
-  EXPECT_STREQ(
-      "\xF4\x88\x98\xB4"
-          "\xEC\x9D\x8D"
-          "\n"
-          "\xD5\xB6"
-          "\xE0\xA3\x93"
-          "\xF4\x88\x98\xB4",
-      WideStringToUtf8(s, -1).c_str());
-}
-#else
-TEST(WideStringToUtf8Test, ConcatenatesCodepointsCorrectly) {
-  const wchar_t s[] = { 0xC74D, '\n', 0x576, 0x8D3, '\0'};
-  EXPECT_STREQ(
-      "\xEC\x9D\x8D" "\n" "\xD5\xB6" "\xE0\xA3\x93",
-      WideStringToUtf8(s, -1).c_str());
-}
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests the Random class.
-
-TEST(RandomDeathTest, GeneratesCrashesOnInvalidRange) {
-  testing::internal::Random random(42);
-  EXPECT_DEATH_IF_SUPPORTED(
-      random.Generate(0),
-      "Cannot generate a number in the range \\[0, 0\\)");
-  EXPECT_DEATH_IF_SUPPORTED(
-      random.Generate(testing::internal::Random::kMaxRange + 1),
-      "Generation of a number in \\[0, 2147483649\\) was requested, "
-      "but this can only generate numbers in \\[0, 2147483648\\)");
-}
-
-TEST(RandomTest, GeneratesNumbersWithinRange) {
-  constexpr uint32_t kRange = 10000;
-  testing::internal::Random random(12345);
-  for (int i = 0; i < 10; i++) {
-    EXPECT_LT(random.Generate(kRange), kRange) << " for iteration " << i;
-  }
-
-  testing::internal::Random random2(testing::internal::Random::kMaxRange);
-  for (int i = 0; i < 10; i++) {
-    EXPECT_LT(random2.Generate(kRange), kRange) << " for iteration " << i;
-  }
-}
-
-TEST(RandomTest, RepeatsWhenReseeded) {
-  constexpr int kSeed = 123;
-  constexpr int kArraySize = 10;
-  constexpr uint32_t kRange = 10000;
-  uint32_t values[kArraySize];
-
-  testing::internal::Random random(kSeed);
-  for (int i = 0; i < kArraySize; i++) {
-    values[i] = random.Generate(kRange);
-  }
-
-  random.Reseed(kSeed);
-  for (int i = 0; i < kArraySize; i++) {
-    EXPECT_EQ(values[i], random.Generate(kRange)) << " for iteration " << i;
-  }
-}
-
-// Tests STL container utilities.
-
-// Tests CountIf().
-
-static bool IsPositive(int n) { return n > 0; }
-
-TEST(ContainerUtilityTest, CountIf) {
-  std::vector<int> v;
-  EXPECT_EQ(0, CountIf(v, IsPositive));  // Works for an empty container.
-
-  v.push_back(-1);
-  v.push_back(0);
-  EXPECT_EQ(0, CountIf(v, IsPositive));  // Works when no value satisfies.
-
-  v.push_back(2);
-  v.push_back(-10);
-  v.push_back(10);
-  EXPECT_EQ(2, CountIf(v, IsPositive));
-}
-
-// Tests ForEach().
-
-static int g_sum = 0;
-static void Accumulate(int n) { g_sum += n; }
-
-TEST(ContainerUtilityTest, ForEach) {
-  std::vector<int> v;
-  g_sum = 0;
-  ForEach(v, Accumulate);
-  EXPECT_EQ(0, g_sum);  // Works for an empty container;
-
-  g_sum = 0;
-  v.push_back(1);
-  ForEach(v, Accumulate);
-  EXPECT_EQ(1, g_sum);  // Works for a container with one element.
-
-  g_sum = 0;
-  v.push_back(20);
-  v.push_back(300);
-  ForEach(v, Accumulate);
-  EXPECT_EQ(321, g_sum);
-}
-
-// Tests GetElementOr().
-TEST(ContainerUtilityTest, GetElementOr) {
-  std::vector<char> a;
-  EXPECT_EQ('x', GetElementOr(a, 0, 'x'));
-
-  a.push_back('a');
-  a.push_back('b');
-  EXPECT_EQ('a', GetElementOr(a, 0, 'x'));
-  EXPECT_EQ('b', GetElementOr(a, 1, 'x'));
-  EXPECT_EQ('x', GetElementOr(a, -2, 'x'));
-  EXPECT_EQ('x', GetElementOr(a, 2, 'x'));
-}
-
-TEST(ContainerUtilityDeathTest, ShuffleRange) {
-  std::vector<int> a;
-  a.push_back(0);
-  a.push_back(1);
-  a.push_back(2);
-  testing::internal::Random random(1);
-
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, -1, 1, &a),
-      "Invalid shuffle range start -1: must be in range \\[0, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 4, 4, &a),
-      "Invalid shuffle range start 4: must be in range \\[0, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 3, 2, &a),
-      "Invalid shuffle range finish 2: must be in range \\[3, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 3, 4, &a),
-      "Invalid shuffle range finish 4: must be in range \\[3, 3\\]");
-}
-
-class VectorShuffleTest : public Test {
- protected:
-  static const size_t kVectorSize = 20;
-
-  VectorShuffleTest() : random_(1) {
-    for (int i = 0; i < static_cast<int>(kVectorSize); i++) {
-      vector_.push_back(i);
-    }
-  }
-
-  static bool VectorIsCorrupt(const TestingVector& vector) {
-    if (kVectorSize != vector.size()) {
-      return true;
-    }
-
-    bool found_in_vector[kVectorSize] = { false };
-    for (size_t i = 0; i < vector.size(); i++) {
-      const int e = vector[i];
-      if (e < 0 || e >= static_cast<int>(kVectorSize) || found_in_vector[e]) {
-        return true;
-      }
-      found_in_vector[e] = true;
-    }
-
-    // Vector size is correct, elements' range is correct, no
-    // duplicate elements.  Therefore no corruption has occurred.
-    return false;
-  }
-
-  static bool VectorIsNotCorrupt(const TestingVector& vector) {
-    return !VectorIsCorrupt(vector);
-  }
-
-  static bool RangeIsShuffled(const TestingVector& vector, int begin, int end) {
-    for (int i = begin; i < end; i++) {
-      if (i != vector[static_cast<size_t>(i)]) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  static bool RangeIsUnshuffled(
-      const TestingVector& vector, int begin, int end) {
-    return !RangeIsShuffled(vector, begin, end);
-  }
-
-  static bool VectorIsShuffled(const TestingVector& vector) {
-    return RangeIsShuffled(vector, 0, static_cast<int>(vector.size()));
-  }
-
-  static bool VectorIsUnshuffled(const TestingVector& vector) {
-    return !VectorIsShuffled(vector);
-  }
-
-  testing::internal::Random random_;
-  TestingVector vector_;
-};  // class VectorShuffleTest
-
-const size_t VectorShuffleTest::kVectorSize;
-
-TEST_F(VectorShuffleTest, HandlesEmptyRange) {
-  // Tests an empty range at the beginning...
-  ShuffleRange(&random_, 0, 0, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...in the middle...
-  ShuffleRange(&random_, kVectorSize/2, kVectorSize/2, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...at the end...
-  ShuffleRange(&random_, kVectorSize - 1, kVectorSize - 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...and past the end.
-  ShuffleRange(&random_, kVectorSize, kVectorSize, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-}
-
-TEST_F(VectorShuffleTest, HandlesRangeOfSizeOne) {
-  // Tests a size one range at the beginning...
-  ShuffleRange(&random_, 0, 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...in the middle...
-  ShuffleRange(&random_, kVectorSize/2, kVectorSize/2 + 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...and at the end.
-  ShuffleRange(&random_, kVectorSize - 1, kVectorSize, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-}
-
-// Because we use our own random number generator and a fixed seed,
-// we can guarantee that the following "random" tests will succeed.
-
-TEST_F(VectorShuffleTest, ShufflesEntireVector) {
-  Shuffle(&random_, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_FALSE(VectorIsUnshuffled(vector_)) << vector_;
-
-  // Tests the first and last elements in particular to ensure that
-  // there are no off-by-one problems in our shuffle algorithm.
-  EXPECT_NE(0, vector_[0]);
-  EXPECT_NE(static_cast<int>(kVectorSize - 1), vector_[kVectorSize - 1]);
-}
-
-TEST_F(VectorShuffleTest, ShufflesStartOfVector) {
-  const int kRangeSize = kVectorSize/2;
-
-  ShuffleRange(&random_, 0, kRangeSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsShuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesEndOfVector) {
-  const int kRangeSize = kVectorSize / 2;
-  ShuffleRange(&random_, kRangeSize, kVectorSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsShuffled, vector_, kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesMiddleOfVector) {
-  const int kRangeSize = static_cast<int>(kVectorSize) / 3;
-  ShuffleRange(&random_, kRangeSize, 2*kRangeSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsShuffled, vector_, kRangeSize, 2*kRangeSize);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 2 * kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesRepeatably) {
-  TestingVector vector2;
-  for (size_t i = 0; i < kVectorSize; i++) {
-    vector2.push_back(static_cast<int>(i));
-  }
-
-  random_.Reseed(1234);
-  Shuffle(&random_, &vector_);
-  random_.Reseed(1234);
-  Shuffle(&random_, &vector2);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector2);
-
-  for (size_t i = 0; i < kVectorSize; i++) {
-    EXPECT_EQ(vector_[i], vector2[i]) << " where i is " << i;
-  }
-}
-
-// Tests the size of the AssertHelper class.
-
-TEST(AssertHelperTest, AssertHelperIsSmall) {
-  // To avoid breaking clients that use lots of assertions in one
-  // function, we cannot grow the size of AssertHelper.
-  EXPECT_LE(sizeof(testing::internal::AssertHelper), sizeof(void*));
-}
-
-// Tests String::EndsWithCaseInsensitive().
-TEST(StringTest, EndsWithCaseInsensitive) {
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobar", "BAR"));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobaR", "bar"));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobar", ""));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("", ""));
-
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("Foobar", "foo"));
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("foobar", "Foo"));
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("", "foo"));
-}
-
-// C++Builder's preprocessor is buggy; it fails to expand macros that
-// appear in macro parameters after wide char literals.  Provide an alias
-// for NULL as a workaround.
-static const wchar_t* const kNull = nullptr;
-
-// Tests String::CaseInsensitiveWideCStringEquals
-TEST(StringTest, CaseInsensitiveWideCStringEquals) {
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(nullptr, nullptr));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(kNull, L""));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(L"", kNull));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(kNull, L"foobar"));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(L"foobar", kNull));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"foobar", L"foobar"));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"foobar", L"FOOBAR"));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"FOOBAR", L"foobar"));
-}
-
-#if GTEST_OS_WINDOWS
-
-// Tests String::ShowWideCString().
-TEST(StringTest, ShowWideCString) {
-  EXPECT_STREQ("(null)",
-               String::ShowWideCString(NULL).c_str());
-  EXPECT_STREQ("", String::ShowWideCString(L"").c_str());
-  EXPECT_STREQ("foo", String::ShowWideCString(L"foo").c_str());
-}
-
-# if GTEST_OS_WINDOWS_MOBILE
-TEST(StringTest, AnsiAndUtf16Null) {
-  EXPECT_EQ(NULL, String::AnsiToUtf16(NULL));
-  EXPECT_EQ(NULL, String::Utf16ToAnsi(NULL));
-}
-
-TEST(StringTest, AnsiAndUtf16ConvertBasic) {
-  const char* ansi = String::Utf16ToAnsi(L"str");
-  EXPECT_STREQ("str", ansi);
-  delete [] ansi;
-  const WCHAR* utf16 = String::AnsiToUtf16("str");
-  EXPECT_EQ(0, wcsncmp(L"str", utf16, 3));
-  delete [] utf16;
-}
-
-TEST(StringTest, AnsiAndUtf16ConvertPathChars) {
-  const char* ansi = String::Utf16ToAnsi(L".:\\ \"*?");
-  EXPECT_STREQ(".:\\ \"*?", ansi);
-  delete [] ansi;
-  const WCHAR* utf16 = String::AnsiToUtf16(".:\\ \"*?");
-  EXPECT_EQ(0, wcsncmp(L".:\\ \"*?", utf16, 3));
-  delete [] utf16;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#endif  // GTEST_OS_WINDOWS
-
-// Tests TestProperty construction.
-TEST(TestPropertyTest, StringValue) {
-  TestProperty property("key", "1");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("1", property.value());
-}
-
-// Tests TestProperty replacing a value.
-TEST(TestPropertyTest, ReplaceStringValue) {
-  TestProperty property("key", "1");
-  EXPECT_STREQ("1", property.value());
-  property.SetValue("2");
-  EXPECT_STREQ("2", property.value());
-}
-
-// AddFatalFailure() and AddNonfatalFailure() must be stand-alone
-// functions (i.e. their definitions cannot be inlined at the call
-// sites), or C++Builder won't compile the code.
-static void AddFatalFailure() {
-  FAIL() << "Expected fatal failure.";
-}
-
-static void AddNonfatalFailure() {
-  ADD_FAILURE() << "Expected non-fatal failure.";
-}
-
-class ScopedFakeTestPartResultReporterTest : public Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  enum FailureMode {
-    FATAL_FAILURE,
-    NONFATAL_FAILURE
-  };
-  static void AddFailure(FailureMode failure) {
-    if (failure == FATAL_FAILURE) {
-      AddFatalFailure();
-    } else {
-      AddNonfatalFailure();
-    }
-  }
-};
-
-// Tests that ScopedFakeTestPartResultReporter intercepts test
-// failures.
-TEST_F(ScopedFakeTestPartResultReporterTest, InterceptsTestFailures) {
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ONLY_CURRENT_THREAD,
-        &results);
-    AddFailure(NONFATAL_FAILURE);
-    AddFailure(FATAL_FAILURE);
-  }
-
-  EXPECT_EQ(2, results.size());
-  EXPECT_TRUE(results.GetTestPartResult(0).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(1).fatally_failed());
-}
-
-TEST_F(ScopedFakeTestPartResultReporterTest, DeprecatedConstructor) {
-  TestPartResultArray results;
-  {
-    // Tests, that the deprecated constructor still works.
-    ScopedFakeTestPartResultReporter reporter(&results);
-    AddFailure(NONFATAL_FAILURE);
-  }
-  EXPECT_EQ(1, results.size());
-}
-
-#if GTEST_IS_THREADSAFE
-
-class ScopedFakeTestPartResultReporterWithThreadsTest
-  : public ScopedFakeTestPartResultReporterTest {
- protected:
-  static void AddFailureInOtherThread(FailureMode failure) {
-    ThreadWithParam<FailureMode> thread(&AddFailure, failure, nullptr);
-    thread.Join();
-  }
-};
-
-TEST_F(ScopedFakeTestPartResultReporterWithThreadsTest,
-       InterceptsTestFailuresInAllThreads) {
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, &results);
-    AddFailure(NONFATAL_FAILURE);
-    AddFailure(FATAL_FAILURE);
-    AddFailureInOtherThread(NONFATAL_FAILURE);
-    AddFailureInOtherThread(FATAL_FAILURE);
-  }
-
-  EXPECT_EQ(4, results.size());
-  EXPECT_TRUE(results.GetTestPartResult(0).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(1).fatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(2).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(3).fatally_failed());
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests EXPECT_FATAL_FAILURE{,ON_ALL_THREADS}.  Makes sure that they
-// work even if the failure is generated in a called function rather than
-// the current context.
-
-typedef ScopedFakeTestPartResultReporterTest ExpectFatalFailureTest;
-
-TEST_F(ExpectFatalFailureTest, CatchesFatalFaliure) {
-  EXPECT_FATAL_FAILURE(AddFatalFailure(), "Expected fatal failure.");
-}
-
-TEST_F(ExpectFatalFailureTest, AcceptsStdStringObject) {
-  EXPECT_FATAL_FAILURE(AddFatalFailure(),
-                       ::std::string("Expected fatal failure."));
-}
-
-TEST_F(ExpectFatalFailureTest, CatchesFatalFailureOnAllThreads) {
-  // We have another test below to verify that the macro catches fatal
-  // failures generated on another thread.
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFatalFailure(),
-                                      "Expected fatal failure.");
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true"
-# pragma option push -w-ccc
-#endif
-
-// Tests that EXPECT_FATAL_FAILURE() can be used in a non-void
-// function even when the statement in it contains ASSERT_*.
-
-int NonVoidFunction() {
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false), "");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(FAIL(), "");
-  return 0;
-}
-
-TEST_F(ExpectFatalFailureTest, CanBeUsedInNonVoidFunction) {
-  NonVoidFunction();
-}
-
-// Tests that EXPECT_FATAL_FAILURE(statement, ...) doesn't abort the
-// current function even though 'statement' generates a fatal failure.
-
-void DoesNotAbortHelper(bool* aborted) {
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false), "");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(FAIL(), "");
-
-  *aborted = false;
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them.
-# pragma option pop
-#endif
-
-TEST_F(ExpectFatalFailureTest, DoesNotAbort) {
-  bool aborted = true;
-  DoesNotAbortHelper(&aborted);
-  EXPECT_FALSE(aborted);
-}
-
-// Tests that the EXPECT_FATAL_FAILURE{,_ON_ALL_THREADS} accepts a
-// statement that contains a macro which expands to code containing an
-// unprotected comma.
-
-static int global_var = 0;
-#define GTEST_USE_UNPROTECTED_COMMA_ global_var++, global_var++
-
-TEST_F(ExpectFatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddFatalFailure();
-  }, "");
-#endif
-
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddFatalFailure();
-  }, "");
-}
-
-// Tests EXPECT_NONFATAL_FAILURE{,ON_ALL_THREADS}.
-
-typedef ScopedFakeTestPartResultReporterTest ExpectNonfatalFailureTest;
-
-TEST_F(ExpectNonfatalFailureTest, CatchesNonfatalFailure) {
-  EXPECT_NONFATAL_FAILURE(AddNonfatalFailure(),
-                          "Expected non-fatal failure.");
-}
-
-TEST_F(ExpectNonfatalFailureTest, AcceptsStdStringObject) {
-  EXPECT_NONFATAL_FAILURE(AddNonfatalFailure(),
-                          ::std::string("Expected non-fatal failure."));
-}
-
-TEST_F(ExpectNonfatalFailureTest, CatchesNonfatalFailureOnAllThreads) {
-  // We have another test below to verify that the macro catches
-  // non-fatal failures generated on another thread.
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddNonfatalFailure(),
-                                         "Expected non-fatal failure.");
-}
-
-// Tests that the EXPECT_NONFATAL_FAILURE{,_ON_ALL_THREADS} accepts a
-// statement that contains a macro which expands to code containing an
-// unprotected comma.
-TEST_F(ExpectNonfatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-  EXPECT_NONFATAL_FAILURE({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddNonfatalFailure();
-  }, "");
-
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddNonfatalFailure();
-  }, "");
-}
-
-#if GTEST_IS_THREADSAFE
-
-typedef ScopedFakeTestPartResultReporterWithThreadsTest
-    ExpectFailureWithThreadsTest;
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectFatalFailureOnAllThreads) {
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailureInOtherThread(FATAL_FAILURE),
-                                      "Expected fatal failure.");
-}
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
-      AddFailureInOtherThread(NONFATAL_FAILURE), "Expected non-fatal failure.");
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests the TestProperty class.
-
-TEST(TestPropertyTest, ConstructorWorks) {
-  const TestProperty property("key", "value");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("value", property.value());
-}
-
-TEST(TestPropertyTest, SetValue) {
-  TestProperty property("key", "value_1");
-  EXPECT_STREQ("key", property.key());
-  property.SetValue("value_2");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("value_2", property.value());
-}
-
-// Tests the TestResult class
-
-// The test fixture for testing TestResult.
-class TestResultTest : public Test {
- protected:
-  typedef std::vector<TestPartResult> TPRVector;
-
-  // We make use of 2 TestPartResult objects,
-  TestPartResult * pr1, * pr2;
-
-  // ... and 3 TestResult objects.
-  TestResult * r0, * r1, * r2;
-
-  void SetUp() override {
-    // pr1 is for success.
-    pr1 = new TestPartResult(TestPartResult::kSuccess,
-                             "foo/bar.cc",
-                             10,
-                             "Success!");
-
-    // pr2 is for fatal failure.
-    pr2 = new TestPartResult(TestPartResult::kFatalFailure,
-                             "foo/bar.cc",
-                             -1,  // This line number means "unknown"
-                             "Failure!");
-
-    // Creates the TestResult objects.
-    r0 = new TestResult();
-    r1 = new TestResult();
-    r2 = new TestResult();
-
-    // In order to test TestResult, we need to modify its internal
-    // state, in particular the TestPartResult vector it holds.
-    // test_part_results() returns a const reference to this vector.
-    // We cast it to a non-const object s.t. it can be modified
-    TPRVector* results1 = const_cast<TPRVector*>(
-        &TestResultAccessor::test_part_results(*r1));
-    TPRVector* results2 = const_cast<TPRVector*>(
-        &TestResultAccessor::test_part_results(*r2));
-
-    // r0 is an empty TestResult.
-
-    // r1 contains a single SUCCESS TestPartResult.
-    results1->push_back(*pr1);
-
-    // r2 contains a SUCCESS, and a FAILURE.
-    results2->push_back(*pr1);
-    results2->push_back(*pr2);
-  }
-
-  void TearDown() override {
-    delete pr1;
-    delete pr2;
-
-    delete r0;
-    delete r1;
-    delete r2;
-  }
-
-  // Helper that compares two TestPartResults.
-  static void CompareTestPartResult(const TestPartResult& expected,
-                                    const TestPartResult& actual) {
-    EXPECT_EQ(expected.type(), actual.type());
-    EXPECT_STREQ(expected.file_name(), actual.file_name());
-    EXPECT_EQ(expected.line_number(), actual.line_number());
-    EXPECT_STREQ(expected.summary(), actual.summary());
-    EXPECT_STREQ(expected.message(), actual.message());
-    EXPECT_EQ(expected.passed(), actual.passed());
-    EXPECT_EQ(expected.failed(), actual.failed());
-    EXPECT_EQ(expected.nonfatally_failed(), actual.nonfatally_failed());
-    EXPECT_EQ(expected.fatally_failed(), actual.fatally_failed());
-  }
-};
-
-// Tests TestResult::total_part_count().
-TEST_F(TestResultTest, total_part_count) {
-  ASSERT_EQ(0, r0->total_part_count());
-  ASSERT_EQ(1, r1->total_part_count());
-  ASSERT_EQ(2, r2->total_part_count());
-}
-
-// Tests TestResult::Passed().
-TEST_F(TestResultTest, Passed) {
-  ASSERT_TRUE(r0->Passed());
-  ASSERT_TRUE(r1->Passed());
-  ASSERT_FALSE(r2->Passed());
-}
-
-// Tests TestResult::Failed().
-TEST_F(TestResultTest, Failed) {
-  ASSERT_FALSE(r0->Failed());
-  ASSERT_FALSE(r1->Failed());
-  ASSERT_TRUE(r2->Failed());
-}
-
-// Tests TestResult::GetTestPartResult().
-
-typedef TestResultTest TestResultDeathTest;
-
-TEST_F(TestResultDeathTest, GetTestPartResult) {
-  CompareTestPartResult(*pr1, r2->GetTestPartResult(0));
-  CompareTestPartResult(*pr2, r2->GetTestPartResult(1));
-  EXPECT_DEATH_IF_SUPPORTED(r2->GetTestPartResult(2), "");
-  EXPECT_DEATH_IF_SUPPORTED(r2->GetTestPartResult(-1), "");
-}
-
-// Tests TestResult has no properties when none are added.
-TEST(TestResultPropertyTest, NoPropertiesFoundWhenNoneAreAdded) {
-  TestResult test_result;
-  ASSERT_EQ(0, test_result.test_property_count());
-}
-
-// Tests TestResult has the expected property when added.
-TEST(TestResultPropertyTest, OnePropertyFoundWhenAdded) {
-  TestResult test_result;
-  TestProperty property("key_1", "1");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property);
-  ASSERT_EQ(1, test_result.test_property_count());
-  const TestProperty& actual_property = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property.key());
-  EXPECT_STREQ("1", actual_property.value());
-}
-
-// Tests TestResult has multiple properties when added.
-TEST(TestResultPropertyTest, MultiplePropertiesFoundWhenAdded) {
-  TestResult test_result;
-  TestProperty property_1("key_1", "1");
-  TestProperty property_2("key_2", "2");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2);
-  ASSERT_EQ(2, test_result.test_property_count());
-  const TestProperty& actual_property_1 = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property_1.key());
-  EXPECT_STREQ("1", actual_property_1.value());
-
-  const TestProperty& actual_property_2 = test_result.GetTestProperty(1);
-  EXPECT_STREQ("key_2", actual_property_2.key());
-  EXPECT_STREQ("2", actual_property_2.value());
-}
-
-// Tests TestResult::RecordProperty() overrides values for duplicate keys.
-TEST(TestResultPropertyTest, OverridesValuesForDuplicateKeys) {
-  TestResult test_result;
-  TestProperty property_1_1("key_1", "1");
-  TestProperty property_2_1("key_2", "2");
-  TestProperty property_1_2("key_1", "12");
-  TestProperty property_2_2("key_2", "22");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1_2);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2_2);
-
-  ASSERT_EQ(2, test_result.test_property_count());
-  const TestProperty& actual_property_1 = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property_1.key());
-  EXPECT_STREQ("12", actual_property_1.value());
-
-  const TestProperty& actual_property_2 = test_result.GetTestProperty(1);
-  EXPECT_STREQ("key_2", actual_property_2.key());
-  EXPECT_STREQ("22", actual_property_2.value());
-}
-
-// Tests TestResult::GetTestProperty().
-TEST(TestResultPropertyTest, GetTestProperty) {
-  TestResult test_result;
-  TestProperty property_1("key_1", "1");
-  TestProperty property_2("key_2", "2");
-  TestProperty property_3("key_3", "3");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_3);
-
-  const TestProperty& fetched_property_1 = test_result.GetTestProperty(0);
-  const TestProperty& fetched_property_2 = test_result.GetTestProperty(1);
-  const TestProperty& fetched_property_3 = test_result.GetTestProperty(2);
-
-  EXPECT_STREQ("key_1", fetched_property_1.key());
-  EXPECT_STREQ("1", fetched_property_1.value());
-
-  EXPECT_STREQ("key_2", fetched_property_2.key());
-  EXPECT_STREQ("2", fetched_property_2.value());
-
-  EXPECT_STREQ("key_3", fetched_property_3.key());
-  EXPECT_STREQ("3", fetched_property_3.value());
-
-  EXPECT_DEATH_IF_SUPPORTED(test_result.GetTestProperty(3), "");
-  EXPECT_DEATH_IF_SUPPORTED(test_result.GetTestProperty(-1), "");
-}
-
-// Tests the Test class.
-//
-// It's difficult to test every public method of this class (we are
-// already stretching the limit of Google Test by using it to test itself!).
-// Fortunately, we don't have to do that, as we are already testing
-// the functionalities of the Test class extensively by using Google Test
-// alone.
-//
-// Therefore, this section only contains one test.
-
-// Tests that GTestFlagSaver works on Windows and Mac.
-
-class GTestFlagSaverTest : public Test {
- protected:
-  // Saves the Google Test flags such that we can restore them later, and
-  // then sets them to their default values.  This will be called
-  // before the first test in this test case is run.
-  static void SetUpTestSuite() {
-    saver_ = new GTestFlagSaver;
-
-    GTEST_FLAG(also_run_disabled_tests) = false;
-    GTEST_FLAG(break_on_failure) = false;
-    GTEST_FLAG(catch_exceptions) = false;
-    GTEST_FLAG(death_test_use_fork) = false;
-    GTEST_FLAG(color) = "auto";
-    GTEST_FLAG(fail_fast) = false;
-    GTEST_FLAG(filter) = "";
-    GTEST_FLAG(list_tests) = false;
-    GTEST_FLAG(output) = "";
-    GTEST_FLAG(brief) = false;
-    GTEST_FLAG(print_time) = true;
-    GTEST_FLAG(random_seed) = 0;
-    GTEST_FLAG(repeat) = 1;
-    GTEST_FLAG(shuffle) = false;
-    GTEST_FLAG(stack_trace_depth) = kMaxStackTraceDepth;
-    GTEST_FLAG(stream_result_to) = "";
-    GTEST_FLAG(throw_on_failure) = false;
-  }
-
-  // Restores the Google Test flags that the tests have modified.  This will
-  // be called after the last test in this test case is run.
-  static void TearDownTestSuite() {
-    delete saver_;
-    saver_ = nullptr;
-  }
-
-  // Verifies that the Google Test flags have their default values, and then
-  // modifies each of them.
-  void VerifyAndModifyFlags() {
-    EXPECT_FALSE(GTEST_FLAG(also_run_disabled_tests));
-    EXPECT_FALSE(GTEST_FLAG(break_on_failure));
-    EXPECT_FALSE(GTEST_FLAG(catch_exceptions));
-    EXPECT_STREQ("auto", GTEST_FLAG(color).c_str());
-    EXPECT_FALSE(GTEST_FLAG(death_test_use_fork));
-    EXPECT_FALSE(GTEST_FLAG(fail_fast));
-    EXPECT_STREQ("", GTEST_FLAG(filter).c_str());
-    EXPECT_FALSE(GTEST_FLAG(list_tests));
-    EXPECT_STREQ("", GTEST_FLAG(output).c_str());
-    EXPECT_FALSE(GTEST_FLAG(brief));
-    EXPECT_TRUE(GTEST_FLAG(print_time));
-    EXPECT_EQ(0, GTEST_FLAG(random_seed));
-    EXPECT_EQ(1, GTEST_FLAG(repeat));
-    EXPECT_FALSE(GTEST_FLAG(shuffle));
-    EXPECT_EQ(kMaxStackTraceDepth, GTEST_FLAG(stack_trace_depth));
-    EXPECT_STREQ("", GTEST_FLAG(stream_result_to).c_str());
-    EXPECT_FALSE(GTEST_FLAG(throw_on_failure));
-
-    GTEST_FLAG(also_run_disabled_tests) = true;
-    GTEST_FLAG(break_on_failure) = true;
-    GTEST_FLAG(catch_exceptions) = true;
-    GTEST_FLAG(color) = "no";
-    GTEST_FLAG(death_test_use_fork) = true;
-    GTEST_FLAG(fail_fast) = true;
-    GTEST_FLAG(filter) = "abc";
-    GTEST_FLAG(list_tests) = true;
-    GTEST_FLAG(output) = "xml:foo.xml";
-    GTEST_FLAG(brief) = true;
-    GTEST_FLAG(print_time) = false;
-    GTEST_FLAG(random_seed) = 1;
-    GTEST_FLAG(repeat) = 100;
-    GTEST_FLAG(shuffle) = true;
-    GTEST_FLAG(stack_trace_depth) = 1;
-    GTEST_FLAG(stream_result_to) = "localhost:1234";
-    GTEST_FLAG(throw_on_failure) = true;
-  }
-
- private:
-  // For saving Google Test flags during this test case.
-  static GTestFlagSaver* saver_;
-};
-
-GTestFlagSaver* GTestFlagSaverTest::saver_ = nullptr;
-
-// Google Test doesn't guarantee the order of tests.  The following two
-// tests are designed to work regardless of their order.
-
-// Modifies the Google Test flags in the test body.
-TEST_F(GTestFlagSaverTest, ModifyGTestFlags) {
-  VerifyAndModifyFlags();
-}
-
-// Verifies that the Google Test flags in the body of the previous test were
-// restored to their original values.
-TEST_F(GTestFlagSaverTest, VerifyGTestFlags) {
-  VerifyAndModifyFlags();
-}
-
-// Sets an environment variable with the given name to the given
-// value.  If the value argument is "", unsets the environment
-// variable.  The caller must ensure that both arguments are not NULL.
-static void SetEnv(const char* name, const char* value) {
-#if GTEST_OS_WINDOWS_MOBILE
-  // Environment variables are not supported on Windows CE.
-  return;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // C++Builder's putenv only stores a pointer to its parameter; we have to
-  // ensure that the string remains valid as long as it might be needed.
-  // We use an std::map to do so.
-  static std::map<std::string, std::string*> added_env;
-
-  // Because putenv stores a pointer to the string buffer, we can't delete the
-  // previous string (if present) until after it's replaced.
-  std::string *prev_env = NULL;
-  if (added_env.find(name) != added_env.end()) {
-    prev_env = added_env[name];
-  }
-  added_env[name] = new std::string(
-      (Message() << name << "=" << value).GetString());
-
-  // The standard signature of putenv accepts a 'char*' argument. Other
-  // implementations, like C++Builder's, accept a 'const char*'.
-  // We cast away the 'const' since that would work for both variants.
-  putenv(const_cast<char*>(added_env[name]->c_str()));
-  delete prev_env;
-#elif GTEST_OS_WINDOWS  // If we are on Windows proper.
-  _putenv((Message() << name << "=" << value).GetString().c_str());
-#else
-  if (*value == '\0') {
-    unsetenv(name);
-  } else {
-    setenv(name, value, 1);
-  }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-// Environment variables are not supported on Windows CE.
-
-using testing::internal::Int32FromGTestEnv;
-
-// Tests Int32FromGTestEnv().
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable is not set.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenVariableIsNotSet) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "");
-  EXPECT_EQ(10, Int32FromGTestEnv("temp", 10));
-}
-
-# if !defined(GTEST_GET_INT32_FROM_ENV_)
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable overflows as an Int32.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenValueOverflows) {
-  printf("(expecting 2 warnings)\n");
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "12345678987654321");
-  EXPECT_EQ(20, Int32FromGTestEnv("temp", 20));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "-12345678987654321");
-  EXPECT_EQ(30, Int32FromGTestEnv("temp", 30));
-}
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable does not represent a valid decimal integer.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenValueIsInvalid) {
-  printf("(expecting 2 warnings)\n");
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "A1");
-  EXPECT_EQ(40, Int32FromGTestEnv("temp", 40));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "12X");
-  EXPECT_EQ(50, Int32FromGTestEnv("temp", 50));
-}
-
-# endif  // !defined(GTEST_GET_INT32_FROM_ENV_)
-
-// Tests that Int32FromGTestEnv() parses and returns the value of the
-// environment variable when it represents a valid decimal integer in
-// the range of an Int32.
-TEST(Int32FromGTestEnvTest, ParsesAndReturnsValidValue) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "123");
-  EXPECT_EQ(123, Int32FromGTestEnv("temp", 0));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "-321");
-  EXPECT_EQ(-321, Int32FromGTestEnv("temp", 0));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests ParseInt32Flag().
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag has wrong format
-TEST(ParseInt32FlagTest, ReturnsFalseForInvalidFlag) {
-  int32_t value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--a=100", "b", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("a=100", "a", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag overflows as an Int32.
-TEST(ParseInt32FlagTest, ReturnsDefaultWhenValueOverflows) {
-  printf("(expecting 2 warnings)\n");
-
-  int32_t value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--abc=12345678987654321", "abc", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("--abc=-12345678987654321", "abc", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag does not represent a valid decimal
-// integer.
-TEST(ParseInt32FlagTest, ReturnsDefaultWhenValueIsInvalid) {
-  printf("(expecting 2 warnings)\n");
-
-  int32_t value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--abc=A1", "abc", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("--abc=12X", "abc", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() parses the value of the flag and
-// returns true when the flag represents a valid decimal integer in
-// the range of an Int32.
-TEST(ParseInt32FlagTest, ParsesAndReturnsValidValue) {
-  int32_t value = 123;
-  EXPECT_TRUE(ParseInt32Flag("--" GTEST_FLAG_PREFIX_ "abc=456", "abc", &value));
-  EXPECT_EQ(456, value);
-
-  EXPECT_TRUE(ParseInt32Flag("--" GTEST_FLAG_PREFIX_ "abc=-789",
-                             "abc", &value));
-  EXPECT_EQ(-789, value);
-}
-
-// Tests that Int32FromEnvOrDie() parses the value of the var or
-// returns the correct default.
-// Environment variables are not supported on Windows CE.
-#if !GTEST_OS_WINDOWS_MOBILE
-TEST(Int32FromEnvOrDieTest, ParsesAndReturnsValidValue) {
-  EXPECT_EQ(333, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", "123");
-  EXPECT_EQ(123, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", "-123");
-  EXPECT_EQ(-123, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable is not an int32_t.
-TEST(Int32FromEnvOrDieDeathTest, AbortsOnFailure) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "xxx");
-  EXPECT_DEATH_IF_SUPPORTED(
-      Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "VAR", 123),
-      ".*");
-}
-
-// Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable cannot be represented by an int32_t.
-TEST(Int32FromEnvOrDieDeathTest, AbortsOnInt32Overflow) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "1234567891234567891234");
-  EXPECT_DEATH_IF_SUPPORTED(
-      Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "VAR", 123),
-      ".*");
-}
-
-// Tests that ShouldRunTestOnShard() selects all tests
-// where there is 1 shard.
-TEST(ShouldRunTestOnShardTest, IsPartitionWhenThereIsOneShard) {
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 0));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 1));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 2));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 3));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 4));
-}
-
-class ShouldShardTest : public testing::Test {
- protected:
-  void SetUp() override {
-    index_var_ = GTEST_FLAG_PREFIX_UPPER_ "INDEX";
-    total_var_ = GTEST_FLAG_PREFIX_UPPER_ "TOTAL";
-  }
-
-  void TearDown() override {
-    SetEnv(index_var_, "");
-    SetEnv(total_var_, "");
-  }
-
-  const char* index_var_;
-  const char* total_var_;
-};
-
-// Tests that sharding is disabled if neither of the environment variables
-// are set.
-TEST_F(ShouldShardTest, ReturnsFalseWhenNeitherEnvVarIsSet) {
-  SetEnv(index_var_, "");
-  SetEnv(total_var_, "");
-
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-
-// Tests that sharding is not enabled if total_shards  == 1.
-TEST_F(ShouldShardTest, ReturnsFalseWhenTotalShardIsOne) {
-  SetEnv(index_var_, "0");
-  SetEnv(total_var_, "1");
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-
-// Tests that sharding is enabled if total_shards > 1 and
-// we are not in a death test subprocess.
-// Environment variables are not supported on Windows CE.
-#if !GTEST_OS_WINDOWS_MOBILE
-TEST_F(ShouldShardTest, WorksWhenShardEnvVarsAreValid) {
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "22");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-
-  SetEnv(index_var_, "8");
-  SetEnv(total_var_, "9");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-
-  SetEnv(index_var_, "0");
-  SetEnv(total_var_, "9");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests that we exit in error if the sharding values are not valid.
-
-typedef ShouldShardTest ShouldShardDeathTest;
-
-TEST_F(ShouldShardDeathTest, AbortsWhenShardingEnvVarsAreInvalid) {
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "4");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "-2");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "5");
-  SetEnv(total_var_, "");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "");
-  SetEnv(total_var_, "5");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-}
-
-// Tests that ShouldRunTestOnShard is a partition when 5
-// shards are used.
-TEST(ShouldRunTestOnShardTest, IsPartitionWhenThereAreFiveShards) {
-  // Choose an arbitrary number of tests and shards.
-  const int num_tests = 17;
-  const int num_shards = 5;
-
-  // Check partitioning: each test should be on exactly 1 shard.
-  for (int test_id = 0; test_id < num_tests; test_id++) {
-    int prev_selected_shard_index = -1;
-    for (int shard_index = 0; shard_index < num_shards; shard_index++) {
-      if (ShouldRunTestOnShard(num_shards, shard_index, test_id)) {
-        if (prev_selected_shard_index < 0) {
-          prev_selected_shard_index = shard_index;
-        } else {
-          ADD_FAILURE() << "Shard " << prev_selected_shard_index << " and "
-            << shard_index << " are both selected to run test " << test_id;
-        }
-      }
-    }
-  }
-
-  // Check balance: This is not required by the sharding protocol, but is a
-  // desirable property for performance.
-  for (int shard_index = 0; shard_index < num_shards; shard_index++) {
-    int num_tests_on_shard = 0;
-    for (int test_id = 0; test_id < num_tests; test_id++) {
-      num_tests_on_shard +=
-        ShouldRunTestOnShard(num_shards, shard_index, test_id);
-    }
-    EXPECT_GE(num_tests_on_shard, num_tests / num_shards);
-  }
-}
-
-// For the same reason we are not explicitly testing everything in the
-// Test class, there are no separate tests for the following classes
-// (except for some trivial cases):
-//
-//   TestSuite, UnitTest, UnitTestResultPrinter.
-//
-// Similarly, there are no separate tests for the following macros:
-//
-//   TEST, TEST_F, RUN_ALL_TESTS
-
-TEST(UnitTestTest, CanGetOriginalWorkingDir) {
-  ASSERT_TRUE(UnitTest::GetInstance()->original_working_dir() != nullptr);
-  EXPECT_STRNE(UnitTest::GetInstance()->original_working_dir(), "");
-}
-
-TEST(UnitTestTest, ReturnsPlausibleTimestamp) {
-  EXPECT_LT(0, UnitTest::GetInstance()->start_timestamp());
-  EXPECT_LE(UnitTest::GetInstance()->start_timestamp(), GetTimeInMillis());
-}
-
-// When a property using a reserved key is supplied to this function, it
-// tests that a non-fatal failure is added, a fatal failure is not added,
-// and that the property is not recorded.
-void ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-    const TestResult& test_result, const char* key) {
-  EXPECT_NONFATAL_FAILURE(Test::RecordProperty(key, "1"), "Reserved key");
-  ASSERT_EQ(0, test_result.test_property_count()) << "Property for key '" << key
-                                                  << "' recorded unexpectedly.";
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-    const char* key) {
-  const TestInfo* test_info = UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(test_info != nullptr);
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(*test_info->result(),
-                                                        key);
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-    const char* key) {
-  const testing::TestSuite* test_suite =
-      UnitTest::GetInstance()->current_test_suite();
-  ASSERT_TRUE(test_suite != nullptr);
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-      test_suite->ad_hoc_test_result(), key);
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-    const char* key) {
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-      UnitTest::GetInstance()->ad_hoc_test_result(), key);
-}
-
-// Tests that property recording functions in UnitTest outside of tests
-// functions correcly.  Creating a separate instance of UnitTest ensures it
-// is in a state similar to the UnitTest's singleton's between tests.
-class UnitTestRecordPropertyTest :
-    public testing::internal::UnitTestRecordPropertyTestHelper {
- public:
-  static void SetUpTestSuite() {
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "disabled");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "errors");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "failures");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "name");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "tests");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "time");
-
-    Test::RecordProperty("test_case_key_1", "1");
-
-    const testing::TestSuite* test_suite =
-        UnitTest::GetInstance()->current_test_suite();
-
-    ASSERT_TRUE(test_suite != nullptr);
-
-    ASSERT_EQ(1, test_suite->ad_hoc_test_result().test_property_count());
-    EXPECT_STREQ("test_case_key_1",
-                 test_suite->ad_hoc_test_result().GetTestProperty(0).key());
-    EXPECT_STREQ("1",
-                 test_suite->ad_hoc_test_result().GetTestProperty(0).value());
-  }
-};
-
-// Tests TestResult has the expected property when added.
-TEST_F(UnitTestRecordPropertyTest, OnePropertyFoundWhenAdded) {
-  UnitTestRecordProperty("key_1", "1");
-
-  ASSERT_EQ(1, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-}
-
-// Tests TestResult has multiple properties when added.
-TEST_F(UnitTestRecordPropertyTest, MultiplePropertiesFoundWhenAdded) {
-  UnitTestRecordProperty("key_1", "1");
-  UnitTestRecordProperty("key_2", "2");
-
-  ASSERT_EQ(2, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("1", unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-
-  EXPECT_STREQ("key_2",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).key());
-  EXPECT_STREQ("2", unit_test_.ad_hoc_test_result().GetTestProperty(1).value());
-}
-
-// Tests TestResult::RecordProperty() overrides values for duplicate keys.
-TEST_F(UnitTestRecordPropertyTest, OverridesValuesForDuplicateKeys) {
-  UnitTestRecordProperty("key_1", "1");
-  UnitTestRecordProperty("key_2", "2");
-  UnitTestRecordProperty("key_1", "12");
-  UnitTestRecordProperty("key_2", "22");
-
-  ASSERT_EQ(2, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("12",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-
-  EXPECT_STREQ("key_2",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).key());
-  EXPECT_STREQ("22",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).value());
-}
-
-TEST_F(UnitTestRecordPropertyTest,
-       AddFailureInsideTestsWhenUsingTestSuiteReservedKeys) {
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "name");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "value_param");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "type_param");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "status");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "time");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "classname");
-}
-
-TEST_F(UnitTestRecordPropertyTest,
-       AddRecordWithReservedKeysGeneratesCorrectPropertyList) {
-  EXPECT_NONFATAL_FAILURE(
-      Test::RecordProperty("name", "1"),
-      "'classname', 'name', 'status', 'time', 'type_param', 'value_param',"
-      " 'file', and 'line' are reserved");
-}
-
-class UnitTestRecordPropertyTestEnvironment : public Environment {
- public:
-  void TearDown() override {
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "tests");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "failures");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "disabled");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "errors");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "name");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "timestamp");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "time");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "random_seed");
-  }
-};
-
-// This will test property recording outside of any test or test case.
-static Environment* record_property_env GTEST_ATTRIBUTE_UNUSED_ =
-    AddGlobalTestEnvironment(new UnitTestRecordPropertyTestEnvironment);
-
-// This group of tests is for predicate assertions (ASSERT_PRED*, etc)
-// of various arities.  They do not attempt to be exhaustive.  Rather,
-// view them as smoke tests that can be easily reviewed and verified.
-// A more complete set of tests for predicate assertions can be found
-// in gtest_pred_impl_unittest.cc.
-
-// First, some predicates and predicate-formatters needed by the tests.
-
-// Returns true if and only if the argument is an even number.
-bool IsEven(int n) {
-  return (n % 2) == 0;
-}
-
-// A functor that returns true if and only if the argument is an even number.
-struct IsEvenFunctor {
-  bool operator()(int n) { return IsEven(n); }
-};
-
-// A predicate-formatter function that asserts the argument is an even
-// number.
-AssertionResult AssertIsEven(const char* expr, int n) {
-  if (IsEven(n)) {
-    return AssertionSuccess();
-  }
-
-  Message msg;
-  msg << expr << " evaluates to " << n << ", which is not even.";
-  return AssertionFailure(msg);
-}
-
-// A predicate function that returns AssertionResult for use in
-// EXPECT/ASSERT_TRUE/FALSE.
-AssertionResult ResultIsEven(int n) {
-  if (IsEven(n))
-    return AssertionSuccess() << n << " is even";
-  else
-    return AssertionFailure() << n << " is odd";
-}
-
-// A predicate function that returns AssertionResult but gives no
-// explanation why it succeeds. Needed for testing that
-// EXPECT/ASSERT_FALSE handles such functions correctly.
-AssertionResult ResultIsEvenNoExplanation(int n) {
-  if (IsEven(n))
-    return AssertionSuccess();
-  else
-    return AssertionFailure() << n << " is odd";
-}
-
-// A predicate-formatter functor that asserts the argument is an even
-// number.
-struct AssertIsEvenFunctor {
-  AssertionResult operator()(const char* expr, int n) {
-    return AssertIsEven(expr, n);
-  }
-};
-
-// Returns true if and only if the sum of the arguments is an even number.
-bool SumIsEven2(int n1, int n2) {
-  return IsEven(n1 + n2);
-}
-
-// A functor that returns true if and only if the sum of the arguments is an
-// even number.
-struct SumIsEven3Functor {
-  bool operator()(int n1, int n2, int n3) {
-    return IsEven(n1 + n2 + n3);
-  }
-};
-
-// A predicate-formatter function that asserts the sum of the
-// arguments is an even number.
-AssertionResult AssertSumIsEven4(
-    const char* e1, const char* e2, const char* e3, const char* e4,
-    int n1, int n2, int n3, int n4) {
-  const int sum = n1 + n2 + n3 + n4;
-  if (IsEven(sum)) {
-    return AssertionSuccess();
-  }
-
-  Message msg;
-  msg << e1 << " + " << e2 << " + " << e3 << " + " << e4
-      << " (" << n1 << " + " << n2 << " + " << n3 << " + " << n4
-      << ") evaluates to " << sum << ", which is not even.";
-  return AssertionFailure(msg);
-}
-
-// A predicate-formatter functor that asserts the sum of the arguments
-// is an even number.
-struct AssertSumIsEven5Functor {
-  AssertionResult operator()(
-      const char* e1, const char* e2, const char* e3, const char* e4,
-      const char* e5, int n1, int n2, int n3, int n4, int n5) {
-    const int sum = n1 + n2 + n3 + n4 + n5;
-    if (IsEven(sum)) {
-      return AssertionSuccess();
-    }
-
-    Message msg;
-    msg << e1 << " + " << e2 << " + " << e3 << " + " << e4 << " + " << e5
-        << " ("
-        << n1 << " + " << n2 << " + " << n3 << " + " << n4 << " + " << n5
-        << ") evaluates to " << sum << ", which is not even.";
-    return AssertionFailure(msg);
-  }
-};
-
-
-// Tests unary predicate assertions.
-
-// Tests unary predicate assertions that don't use a custom formatter.
-TEST(Pred1Test, WithoutFormat) {
-  // Success cases.
-  EXPECT_PRED1(IsEvenFunctor(), 2) << "This failure is UNEXPECTED!";
-  ASSERT_PRED1(IsEven, 4);
-
-  // Failure cases.
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(IsEven, 5) << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE(ASSERT_PRED1(IsEvenFunctor(), 5),
-                       "evaluates to false");
-}
-
-// Tests unary predicate assertions that use a custom formatter.
-TEST(Pred1Test, WithFormat) {
-  // Success cases.
-  EXPECT_PRED_FORMAT1(AssertIsEven, 2);
-  ASSERT_PRED_FORMAT1(AssertIsEvenFunctor(), 4)
-    << "This failure is UNEXPECTED!";
-
-  // Failure cases.
-  const int n = 5;
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT1(AssertIsEvenFunctor(), n),
-                          "n evaluates to 5, which is not even.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(AssertIsEven, 5) << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-// Tests that unary predicate assertions evaluates their arguments
-// exactly once.
-TEST(Pred1Test, SingleEvaluationOnFailure) {
-  // A success case.
-  static int n = 0;
-  EXPECT_PRED1(IsEven, n++);
-  EXPECT_EQ(1, n) << "The argument is not evaluated exactly once.";
-
-  // A failure case.
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(AssertIsEvenFunctor(), n++)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_EQ(2, n) << "The argument is not evaluated exactly once.";
-}
-
-
-// Tests predicate assertions whose arity is >= 2.
-
-// Tests predicate assertions that don't use a custom formatter.
-TEST(PredTest, WithoutFormat) {
-  // Success cases.
-  ASSERT_PRED2(SumIsEven2, 2, 4) << "This failure is UNEXPECTED!";
-  EXPECT_PRED3(SumIsEven3Functor(), 4, 6, 8);
-
-  // Failure cases.
-  const int n1 = 1;
-  const int n2 = 2;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(SumIsEven2, n1, n2) << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(SumIsEven3Functor(), 1, 2, 4);
-  }, "evaluates to false");
-}
-
-// Tests predicate assertions that use a custom formatter.
-TEST(PredTest, WithFormat) {
-  // Success cases.
-  ASSERT_PRED_FORMAT4(AssertSumIsEven4, 4, 6, 8, 10) <<
-    "This failure is UNEXPECTED!";
-  EXPECT_PRED_FORMAT5(AssertSumIsEven5Functor(), 2, 4, 6, 8, 10);
-
-  // Failure cases.
-  const int n1 = 1;
-  const int n2 = 2;
-  const int n3 = 4;
-  const int n4 = 6;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(AssertSumIsEven4, n1, n2, n3, n4);
-  }, "evaluates to 13, which is not even.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(AssertSumIsEven5Functor(), 1, 2, 4, 6, 8)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-// Tests that predicate assertions evaluates their arguments
-// exactly once.
-TEST(PredTest, SingleEvaluationOnFailure) {
-  // A success case.
-  int n1 = 0;
-  int n2 = 0;
-  EXPECT_PRED2(SumIsEven2, n1++, n2++);
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-
-  // Another success case.
-  n1 = n2 = 0;
-  int n3 = 0;
-  int n4 = 0;
-  int n5 = 0;
-  ASSERT_PRED_FORMAT5(AssertSumIsEven5Functor(),
-                      n1++, n2++, n3++, n4++, n5++)
-                        << "This failure is UNEXPECTED!";
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-  EXPECT_EQ(1, n4) << "Argument 4 is not evaluated exactly once.";
-  EXPECT_EQ(1, n5) << "Argument 5 is not evaluated exactly once.";
-
-  // A failure case.
-  n1 = n2 = n3 = 0;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(SumIsEven3Functor(), ++n1, n2++, n3++)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-
-  // Another failure case.
-  n1 = n2 = n3 = n4 = 0;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(AssertSumIsEven4, ++n1, n2++, n3++, n4++);
-  }, "evaluates to 1, which is not even.");
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-  EXPECT_EQ(1, n4) << "Argument 4 is not evaluated exactly once.";
-}
-
-// Test predicate assertions for sets
-TEST(PredTest, ExpectPredEvalFailure) {
-  std::set<int> set_a = {2, 1, 3, 4, 5};
-  std::set<int> set_b = {0, 4, 8};
-  const auto compare_sets = [] (std::set<int>, std::set<int>) { return false; };
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_PRED2(compare_sets, set_a, set_b),
-      "compare_sets(set_a, set_b) evaluates to false, where\nset_a evaluates "
-      "to { 1, 2, 3, 4, 5 }\nset_b evaluates to { 0, 4, 8 }");
-}
-
-// Some helper functions for testing using overloaded/template
-// functions with ASSERT_PREDn and EXPECT_PREDn.
-
-bool IsPositive(double x) {
-  return x > 0;
-}
-
-template <typename T>
-bool IsNegative(T x) {
-  return x < 0;
-}
-
-template <typename T1, typename T2>
-bool GreaterThan(T1 x1, T2 x2) {
-  return x1 > x2;
-}
-
-// Tests that overloaded functions can be used in *_PRED* as long as
-// their types are explicitly specified.
-TEST(PredicateAssertionTest, AcceptsOverloadedFunction) {
-  // C++Builder requires C-style casts rather than static_cast.
-  EXPECT_PRED1((bool (*)(int))(IsPositive), 5);  // NOLINT
-  ASSERT_PRED1((bool (*)(double))(IsPositive), 6.0);  // NOLINT
-}
-
-// Tests that template functions can be used in *_PRED* as long as
-// their types are explicitly specified.
-TEST(PredicateAssertionTest, AcceptsTemplateFunction) {
-  EXPECT_PRED1(IsNegative<int>, -5);
-  // Makes sure that we can handle templates with more than one
-  // parameter.
-  ASSERT_PRED2((GreaterThan<int, int>), 5, 0);
-}
-
-
-// Some helper functions for testing using overloaded/template
-// functions with ASSERT_PRED_FORMATn and EXPECT_PRED_FORMATn.
-
-AssertionResult IsPositiveFormat(const char* /* expr */, int n) {
-  return n > 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-AssertionResult IsPositiveFormat(const char* /* expr */, double x) {
-  return x > 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-template <typename T>
-AssertionResult IsNegativeFormat(const char* /* expr */, T x) {
-  return x < 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-template <typename T1, typename T2>
-AssertionResult EqualsFormat(const char* /* expr1 */, const char* /* expr2 */,
-                             const T1& x1, const T2& x2) {
-  return x1 == x2 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-// Tests that overloaded functions can be used in *_PRED_FORMAT*
-// without explicitly specifying their types.
-TEST(PredicateFormatAssertionTest, AcceptsOverloadedFunction) {
-  EXPECT_PRED_FORMAT1(IsPositiveFormat, 5);
-  ASSERT_PRED_FORMAT1(IsPositiveFormat, 6.0);
-}
-
-// Tests that template functions can be used in *_PRED_FORMAT* without
-// explicitly specifying their types.
-TEST(PredicateFormatAssertionTest, AcceptsTemplateFunction) {
-  EXPECT_PRED_FORMAT1(IsNegativeFormat, -5);
-  ASSERT_PRED_FORMAT2(EqualsFormat, 3, 3);
-}
-
-
-// Tests string assertions.
-
-// Tests ASSERT_STREQ with non-NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ) {
-  const char * const p1 = "good";
-  ASSERT_STREQ(p1, p1);
-
-  // Let p2 have the same content as p1, but be at a different address.
-  const char p2[] = "good";
-  ASSERT_STREQ(p1, p2);
-
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("bad", "good"),
-                       "  \"bad\"\n  \"good\"");
-}
-
-// Tests ASSERT_STREQ with NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ_Null) {
-  ASSERT_STREQ(static_cast<const char*>(nullptr), nullptr);
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ(nullptr, "non-null"), "non-null");
-}
-
-// Tests ASSERT_STREQ with NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ_Null2) {
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("non-null", nullptr), "non-null");
-}
-
-// Tests ASSERT_STRNE.
-TEST(StringAssertionTest, ASSERT_STRNE) {
-  ASSERT_STRNE("hi", "Hi");
-  ASSERT_STRNE("Hi", nullptr);
-  ASSERT_STRNE(nullptr, "Hi");
-  ASSERT_STRNE("", nullptr);
-  ASSERT_STRNE(nullptr, "");
-  ASSERT_STRNE("", "Hi");
-  ASSERT_STRNE("Hi", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRNE("Hi", "Hi"),
-                       "\"Hi\" vs \"Hi\"");
-}
-
-// Tests ASSERT_STRCASEEQ.
-TEST(StringAssertionTest, ASSERT_STRCASEEQ) {
-  ASSERT_STRCASEEQ("hi", "Hi");
-  ASSERT_STRCASEEQ(static_cast<const char*>(nullptr), nullptr);
-
-  ASSERT_STRCASEEQ("", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASEEQ("Hi", "hi2"),
-                       "Ignoring case");
-}
-
-// Tests ASSERT_STRCASENE.
-TEST(StringAssertionTest, ASSERT_STRCASENE) {
-  ASSERT_STRCASENE("hi1", "Hi2");
-  ASSERT_STRCASENE("Hi", nullptr);
-  ASSERT_STRCASENE(nullptr, "Hi");
-  ASSERT_STRCASENE("", nullptr);
-  ASSERT_STRCASENE(nullptr, "");
-  ASSERT_STRCASENE("", "Hi");
-  ASSERT_STRCASENE("Hi", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("Hi", "hi"),
-                       "(ignoring case)");
-}
-
-// Tests *_STREQ on wide strings.
-TEST(StringAssertionTest, STREQ_Wide) {
-  // NULL strings.
-  ASSERT_STREQ(static_cast<const wchar_t*>(nullptr), nullptr);
-
-  // Empty strings.
-  ASSERT_STREQ(L"", L"");
-
-  // Non-null vs NULL.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"non-null", nullptr), "non-null");
-
-  // Equal strings.
-  EXPECT_STREQ(L"Hi", L"Hi");
-
-  // Unequal strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"abc", L"Abc"),
-                          "Abc");
-
-  // Strings containing wide characters.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"abc\x8119", L"abc\x8120"),
-                          "abc");
-
-  // The streaming variation.
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_STREQ(L"abc\x8119", L"abc\x8121") << "Expected failure";
-  }, "Expected failure");
-}
-
-// Tests *_STRNE on wide strings.
-TEST(StringAssertionTest, STRNE_Wide) {
-  // NULL strings.
-  EXPECT_NONFATAL_FAILURE(
-      {  // NOLINT
-        EXPECT_STRNE(static_cast<const wchar_t*>(nullptr), nullptr);
-      },
-      "");
-
-  // Empty strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"", L""),
-                          "L\"\"");
-
-  // Non-null vs NULL.
-  ASSERT_STRNE(L"non-null", nullptr);
-
-  // Equal strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"Hi", L"Hi"),
-                          "L\"Hi\"");
-
-  // Unequal strings.
-  EXPECT_STRNE(L"abc", L"Abc");
-
-  // Strings containing wide characters.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"abc\x8119", L"abc\x8119"),
-                          "abc");
-
-  // The streaming variation.
-  ASSERT_STRNE(L"abc\x8119", L"abc\x8120") << "This shouldn't happen";
-}
-
-// Tests for ::testing::IsSubstring().
-
-// Tests that IsSubstring() returns the correct result when the input
-// argument type is const char*.
-TEST(IsSubstringTest, ReturnsCorrectResultForCString) {
-  EXPECT_FALSE(IsSubstring("", "", nullptr, "a"));
-  EXPECT_FALSE(IsSubstring("", "", "b", nullptr));
-  EXPECT_FALSE(IsSubstring("", "", "needle", "haystack"));
-
-  EXPECT_TRUE(IsSubstring("", "", static_cast<const char*>(nullptr), nullptr));
-  EXPECT_TRUE(IsSubstring("", "", "needle", "two needles"));
-}
-
-// Tests that IsSubstring() returns the correct result when the input
-// argument type is const wchar_t*.
-TEST(IsSubstringTest, ReturnsCorrectResultForWideCString) {
-  EXPECT_FALSE(IsSubstring("", "", kNull, L"a"));
-  EXPECT_FALSE(IsSubstring("", "", L"b", kNull));
-  EXPECT_FALSE(IsSubstring("", "", L"needle", L"haystack"));
-
-  EXPECT_TRUE(
-      IsSubstring("", "", static_cast<const wchar_t*>(nullptr), nullptr));
-  EXPECT_TRUE(IsSubstring("", "", L"needle", L"two needles"));
-}
-
-// Tests that IsSubstring() generates the correct message when the input
-// argument type is const char*.
-TEST(IsSubstringTest, GeneratesCorrectMessageForCString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: \"needle\"\n"
-               "Expected: a substring of haystack_expr\n"
-               "Which is: \"haystack\"",
-               IsSubstring("needle_expr", "haystack_expr",
-                           "needle", "haystack").failure_message());
-}
-
-// Tests that IsSubstring returns the correct result when the input
-// argument type is ::std::string.
-TEST(IsSubstringTest, ReturnsCorrectResultsForStdString) {
-  EXPECT_TRUE(IsSubstring("", "", std::string("hello"), "ahellob"));
-  EXPECT_FALSE(IsSubstring("", "", "hello", std::string("world")));
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Tests that IsSubstring returns the correct result when the input
-// argument type is ::std::wstring.
-TEST(IsSubstringTest, ReturnsCorrectResultForStdWstring) {
-  EXPECT_TRUE(IsSubstring("", "", ::std::wstring(L"needle"), L"two needles"));
-  EXPECT_FALSE(IsSubstring("", "", L"needle", ::std::wstring(L"haystack")));
-}
-
-// Tests that IsSubstring() generates the correct message when the input
-// argument type is ::std::wstring.
-TEST(IsSubstringTest, GeneratesCorrectMessageForWstring) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: L\"needle\"\n"
-               "Expected: a substring of haystack_expr\n"
-               "Which is: L\"haystack\"",
-               IsSubstring(
-                   "needle_expr", "haystack_expr",
-                   ::std::wstring(L"needle"), L"haystack").failure_message());
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests for ::testing::IsNotSubstring().
-
-// Tests that IsNotSubstring() returns the correct result when the input
-// argument type is const char*.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForCString) {
-  EXPECT_TRUE(IsNotSubstring("", "", "needle", "haystack"));
-  EXPECT_FALSE(IsNotSubstring("", "", "needle", "two needles"));
-}
-
-// Tests that IsNotSubstring() returns the correct result when the input
-// argument type is const wchar_t*.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForWideCString) {
-  EXPECT_TRUE(IsNotSubstring("", "", L"needle", L"haystack"));
-  EXPECT_FALSE(IsNotSubstring("", "", L"needle", L"two needles"));
-}
-
-// Tests that IsNotSubstring() generates the correct message when the input
-// argument type is const wchar_t*.
-TEST(IsNotSubstringTest, GeneratesCorrectMessageForWideCString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: L\"needle\"\n"
-               "Expected: not a substring of haystack_expr\n"
-               "Which is: L\"two needles\"",
-               IsNotSubstring(
-                   "needle_expr", "haystack_expr",
-                   L"needle", L"two needles").failure_message());
-}
-
-// Tests that IsNotSubstring returns the correct result when the input
-// argument type is ::std::string.
-TEST(IsNotSubstringTest, ReturnsCorrectResultsForStdString) {
-  EXPECT_FALSE(IsNotSubstring("", "", std::string("hello"), "ahellob"));
-  EXPECT_TRUE(IsNotSubstring("", "", "hello", std::string("world")));
-}
-
-// Tests that IsNotSubstring() generates the correct message when the input
-// argument type is ::std::string.
-TEST(IsNotSubstringTest, GeneratesCorrectMessageForStdString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: \"needle\"\n"
-               "Expected: not a substring of haystack_expr\n"
-               "Which is: \"two needles\"",
-               IsNotSubstring(
-                   "needle_expr", "haystack_expr",
-                   ::std::string("needle"), "two needles").failure_message());
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Tests that IsNotSubstring returns the correct result when the input
-// argument type is ::std::wstring.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForStdWstring) {
-  EXPECT_FALSE(
-      IsNotSubstring("", "", ::std::wstring(L"needle"), L"two needles"));
-  EXPECT_TRUE(IsNotSubstring("", "", L"needle", ::std::wstring(L"haystack")));
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests floating-point assertions.
-
-template <typename RawType>
-class FloatingPointTest : public Test {
- protected:
-  // Pre-calculated numbers to be used by the tests.
-  struct TestValues {
-    RawType close_to_positive_zero;
-    RawType close_to_negative_zero;
-    RawType further_from_negative_zero;
-
-    RawType close_to_one;
-    RawType further_from_one;
-
-    RawType infinity;
-    RawType close_to_infinity;
-    RawType further_from_infinity;
-
-    RawType nan1;
-    RawType nan2;
-  };
-
-  typedef typename testing::internal::FloatingPoint<RawType> Floating;
-  typedef typename Floating::Bits Bits;
-
-  void SetUp() override {
-    const uint32_t max_ulps = Floating::kMaxUlps;
-
-    // The bits that represent 0.0.
-    const Bits zero_bits = Floating(0).bits();
-
-    // Makes some numbers close to 0.0.
-    values_.close_to_positive_zero = Floating::ReinterpretBits(
-        zero_bits + max_ulps/2);
-    values_.close_to_negative_zero = -Floating::ReinterpretBits(
-        zero_bits + max_ulps - max_ulps/2);
-    values_.further_from_negative_zero = -Floating::ReinterpretBits(
-        zero_bits + max_ulps + 1 - max_ulps/2);
-
-    // The bits that represent 1.0.
-    const Bits one_bits = Floating(1).bits();
-
-    // Makes some numbers close to 1.0.
-    values_.close_to_one = Floating::ReinterpretBits(one_bits + max_ulps);
-    values_.further_from_one = Floating::ReinterpretBits(
-        one_bits + max_ulps + 1);
-
-    // +infinity.
-    values_.infinity = Floating::Infinity();
-
-    // The bits that represent +infinity.
-    const Bits infinity_bits = Floating(values_.infinity).bits();
-
-    // Makes some numbers close to infinity.
-    values_.close_to_infinity = Floating::ReinterpretBits(
-        infinity_bits - max_ulps);
-    values_.further_from_infinity = Floating::ReinterpretBits(
-        infinity_bits - max_ulps - 1);
-
-    // Makes some NAN's.  Sets the most significant bit of the fraction so that
-    // our NaN's are quiet; trying to process a signaling NaN would raise an
-    // exception if our environment enables floating point exceptions.
-    values_.nan1 = Floating::ReinterpretBits(Floating::kExponentBitMask
-        | (static_cast<Bits>(1) << (Floating::kFractionBitCount - 1)) | 1);
-    values_.nan2 = Floating::ReinterpretBits(Floating::kExponentBitMask
-        | (static_cast<Bits>(1) << (Floating::kFractionBitCount - 1)) | 200);
-  }
-
-  void TestSize() {
-    EXPECT_EQ(sizeof(RawType), sizeof(Bits));
-  }
-
-  static TestValues values_;
-};
-
-template <typename RawType>
-typename FloatingPointTest<RawType>::TestValues
-    FloatingPointTest<RawType>::values_;
-
-// Instantiates FloatingPointTest for testing *_FLOAT_EQ.
-typedef FloatingPointTest<float> FloatTest;
-
-// Tests that the size of Float::Bits matches the size of float.
-TEST_F(FloatTest, Size) {
-  TestSize();
-}
-
-// Tests comparing with +0 and -0.
-TEST_F(FloatTest, Zeros) {
-  EXPECT_FLOAT_EQ(0.0, -0.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(-0.0, 1.0),
-                          "1.0");
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(0.0, 1.5),
-                       "1.5");
-}
-
-// Tests comparing numbers close to 0.
-//
-// This ensures that *_FLOAT_EQ handles the sign correctly and no
-// overflow occurs when comparing numbers whose absolute value is very
-// small.
-TEST_F(FloatTest, AlmostZeros) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const FloatTest::TestValues& v = this->values_;
-
-  EXPECT_FLOAT_EQ(0.0, v.close_to_positive_zero);
-  EXPECT_FLOAT_EQ(-0.0, v.close_to_negative_zero);
-  EXPECT_FLOAT_EQ(v.close_to_positive_zero, v.close_to_negative_zero);
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_FLOAT_EQ(v.close_to_positive_zero,
-                    v.further_from_negative_zero);
-  }, "v.further_from_negative_zero");
-}
-
-// Tests comparing numbers close to each other.
-TEST_F(FloatTest, SmallDiff) {
-  EXPECT_FLOAT_EQ(1.0, values_.close_to_one);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(1.0, values_.further_from_one),
-                          "values_.further_from_one");
-}
-
-// Tests comparing numbers far apart.
-TEST_F(FloatTest, LargeDiff) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(2.5, 3.0),
-                          "3.0");
-}
-
-// Tests comparing with infinity.
-//
-// This ensures that no overflow occurs when comparing numbers whose
-// absolute value is very large.
-TEST_F(FloatTest, Infinity) {
-  EXPECT_FLOAT_EQ(values_.infinity, values_.close_to_infinity);
-  EXPECT_FLOAT_EQ(-values_.infinity, -values_.close_to_infinity);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.infinity, -values_.infinity),
-                          "-values_.infinity");
-
-  // This is interesting as the representations of infinity and nan1
-  // are only 1 DLP apart.
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.infinity, values_.nan1),
-                          "values_.nan1");
-}
-
-// Tests that comparing with NAN always returns false.
-TEST_F(FloatTest, NaN) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const FloatTest::TestValues& v = this->values_;
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(v.nan1, v.nan1),
-                          "v.nan1");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(v.nan1, v.nan2),
-                          "v.nan2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(1.0, v.nan1),
-                          "v.nan1");
-
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(v.nan1, v.infinity),
-                       "v.infinity");
-}
-
-// Tests that *_FLOAT_EQ are reflexive.
-TEST_F(FloatTest, Reflexive) {
-  EXPECT_FLOAT_EQ(0.0, 0.0);
-  EXPECT_FLOAT_EQ(1.0, 1.0);
-  ASSERT_FLOAT_EQ(values_.infinity, values_.infinity);
-}
-
-// Tests that *_FLOAT_EQ are commutative.
-TEST_F(FloatTest, Commutative) {
-  // We already tested EXPECT_FLOAT_EQ(1.0, values_.close_to_one).
-  EXPECT_FLOAT_EQ(values_.close_to_one, 1.0);
-
-  // We already tested EXPECT_FLOAT_EQ(1.0, values_.further_from_one).
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.further_from_one, 1.0),
-                          "1.0");
-}
-
-// Tests EXPECT_NEAR.
-TEST_F(FloatTest, EXPECT_NEAR) {
-  EXPECT_NEAR(-1.0f, -1.1f, 0.2f);
-  EXPECT_NEAR(2.0f, 3.0f, 1.0f);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NEAR(1.0f, 1.5f, 0.25f),  // NOLINT
-                          "The difference between 1.0f and 1.5f is 0.5, "
-                          "which exceeds 0.25f");
-}
-
-// Tests ASSERT_NEAR.
-TEST_F(FloatTest, ASSERT_NEAR) {
-  ASSERT_NEAR(-1.0f, -1.1f, 0.2f);
-  ASSERT_NEAR(2.0f, 3.0f, 1.0f);
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1.0f, 1.5f, 0.25f),  // NOLINT
-                       "The difference between 1.0f and 1.5f is 0.5, "
-                       "which exceeds 0.25f");
-}
-
-// Tests the cases where FloatLE() should succeed.
-TEST_F(FloatTest, FloatLESucceeds) {
-  EXPECT_PRED_FORMAT2(FloatLE, 1.0f, 2.0f);  // When val1 < val2,
-  ASSERT_PRED_FORMAT2(FloatLE, 1.0f, 1.0f);  // val1 == val2,
-
-  // or when val1 is greater than, but almost equals to, val2.
-  EXPECT_PRED_FORMAT2(FloatLE, values_.close_to_positive_zero, 0.0f);
-}
-
-// Tests the cases where FloatLE() should fail.
-TEST_F(FloatTest, FloatLEFails) {
-  // When val1 is greater than val2 by a large margin,
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT2(FloatLE, 2.0f, 1.0f),
-                          "(2.0f) <= (1.0f)");
-
-  // or by a small yet non-negligible margin,
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, values_.further_from_one, 1.0f);
-  }, "(values_.further_from_one) <= (1.0f)");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, values_.nan1, values_.infinity);
-  }, "(values_.nan1) <= (values_.infinity)");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, -values_.infinity, values_.nan1);
-  }, "(-values_.infinity) <= (values_.nan1)");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(FloatLE, values_.nan1, values_.nan1);
-  }, "(values_.nan1) <= (values_.nan1)");
-}
-
-// Instantiates FloatingPointTest for testing *_DOUBLE_EQ.
-typedef FloatingPointTest<double> DoubleTest;
-
-// Tests that the size of Double::Bits matches the size of double.
-TEST_F(DoubleTest, Size) {
-  TestSize();
-}
-
-// Tests comparing with +0 and -0.
-TEST_F(DoubleTest, Zeros) {
-  EXPECT_DOUBLE_EQ(0.0, -0.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(-0.0, 1.0),
-                          "1.0");
-  EXPECT_FATAL_FAILURE(ASSERT_DOUBLE_EQ(0.0, 1.0),
-                       "1.0");
-}
-
-// Tests comparing numbers close to 0.
-//
-// This ensures that *_DOUBLE_EQ handles the sign correctly and no
-// overflow occurs when comparing numbers whose absolute value is very
-// small.
-TEST_F(DoubleTest, AlmostZeros) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const DoubleTest::TestValues& v = this->values_;
-
-  EXPECT_DOUBLE_EQ(0.0, v.close_to_positive_zero);
-  EXPECT_DOUBLE_EQ(-0.0, v.close_to_negative_zero);
-  EXPECT_DOUBLE_EQ(v.close_to_positive_zero, v.close_to_negative_zero);
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_DOUBLE_EQ(v.close_to_positive_zero,
-                     v.further_from_negative_zero);
-  }, "v.further_from_negative_zero");
-}
-
-// Tests comparing numbers close to each other.
-TEST_F(DoubleTest, SmallDiff) {
-  EXPECT_DOUBLE_EQ(1.0, values_.close_to_one);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1.0, values_.further_from_one),
-                          "values_.further_from_one");
-}
-
-// Tests comparing numbers far apart.
-TEST_F(DoubleTest, LargeDiff) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(2.0, 3.0),
-                          "3.0");
-}
-
-// Tests comparing with infinity.
-//
-// This ensures that no overflow occurs when comparing numbers whose
-// absolute value is very large.
-TEST_F(DoubleTest, Infinity) {
-  EXPECT_DOUBLE_EQ(values_.infinity, values_.close_to_infinity);
-  EXPECT_DOUBLE_EQ(-values_.infinity, -values_.close_to_infinity);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.infinity, -values_.infinity),
-                          "-values_.infinity");
-
-  // This is interesting as the representations of infinity_ and nan1_
-  // are only 1 DLP apart.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.infinity, values_.nan1),
-                          "values_.nan1");
-}
-
-// Tests that comparing with NAN always returns false.
-TEST_F(DoubleTest, NaN) {
-  static const DoubleTest::TestValues& v = this->values_;
-
-  // Nokia's STLport crashes if we try to output infinity or NaN.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(v.nan1, v.nan1),
-                          "v.nan1");
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(v.nan1, v.nan2), "v.nan2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1.0, v.nan1), "v.nan1");
-  EXPECT_FATAL_FAILURE(ASSERT_DOUBLE_EQ(v.nan1, v.infinity),
-                       "v.infinity");
-}
-
-// Tests that *_DOUBLE_EQ are reflexive.
-TEST_F(DoubleTest, Reflexive) {
-  EXPECT_DOUBLE_EQ(0.0, 0.0);
-  EXPECT_DOUBLE_EQ(1.0, 1.0);
-  ASSERT_DOUBLE_EQ(values_.infinity, values_.infinity);
-}
-
-// Tests that *_DOUBLE_EQ are commutative.
-TEST_F(DoubleTest, Commutative) {
-  // We already tested EXPECT_DOUBLE_EQ(1.0, values_.close_to_one).
-  EXPECT_DOUBLE_EQ(values_.close_to_one, 1.0);
-
-  // We already tested EXPECT_DOUBLE_EQ(1.0, values_.further_from_one).
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.further_from_one, 1.0),
-                          "1.0");
-}
-
-// Tests EXPECT_NEAR.
-TEST_F(DoubleTest, EXPECT_NEAR) {
-  EXPECT_NEAR(-1.0, -1.1, 0.2);
-  EXPECT_NEAR(2.0, 3.0, 1.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NEAR(1.0, 1.5, 0.25),  // NOLINT
-                          "The difference between 1.0 and 1.5 is 0.5, "
-                          "which exceeds 0.25");
-  // At this magnitude adjacent doubles are 512.0 apart, so this triggers a
-  // slightly different failure reporting path.
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_NEAR(4.2934311416234112e+18, 4.2934311416234107e+18, 1.0),
-      "The abs_error parameter 1.0 evaluates to 1 which is smaller than the "
-      "minimum distance between doubles for numbers of this magnitude which is "
-      "512");
-}
-
-// Tests ASSERT_NEAR.
-TEST_F(DoubleTest, ASSERT_NEAR) {
-  ASSERT_NEAR(-1.0, -1.1, 0.2);
-  ASSERT_NEAR(2.0, 3.0, 1.0);
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1.0, 1.5, 0.25),  // NOLINT
-                       "The difference between 1.0 and 1.5 is 0.5, "
-                       "which exceeds 0.25");
-}
-
-// Tests the cases where DoubleLE() should succeed.
-TEST_F(DoubleTest, DoubleLESucceeds) {
-  EXPECT_PRED_FORMAT2(DoubleLE, 1.0, 2.0);  // When val1 < val2,
-  ASSERT_PRED_FORMAT2(DoubleLE, 1.0, 1.0);  // val1 == val2,
-
-  // or when val1 is greater than, but almost equals to, val2.
-  EXPECT_PRED_FORMAT2(DoubleLE, values_.close_to_positive_zero, 0.0);
-}
-
-// Tests the cases where DoubleLE() should fail.
-TEST_F(DoubleTest, DoubleLEFails) {
-  // When val1 is greater than val2 by a large margin,
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT2(DoubleLE, 2.0, 1.0),
-                          "(2.0) <= (1.0)");
-
-  // or by a small yet non-negligible margin,
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, values_.further_from_one, 1.0);
-  }, "(values_.further_from_one) <= (1.0)");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, values_.nan1, values_.infinity);
-  }, "(values_.nan1) <= (values_.infinity)");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, -values_.infinity, values_.nan1);
-  }, " (-values_.infinity) <= (values_.nan1)");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(DoubleLE, values_.nan1, values_.nan1);
-  }, "(values_.nan1) <= (values_.nan1)");
-}
-
-
-// Verifies that a test or test case whose name starts with DISABLED_ is
-// not run.
-
-// A test whose name starts with DISABLED_.
-// Should not run.
-TEST(DisabledTest, DISABLED_TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-// A test whose name does not start with DISABLED_.
-// Should run.
-TEST(DisabledTest, NotDISABLED_TestShouldRun) {
-  EXPECT_EQ(1, 1);
-}
-
-// A test case whose name starts with DISABLED_.
-// Should not run.
-TEST(DISABLED_TestSuite, TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Test in disabled test case should not be run.";
-}
-
-// A test case and test whose names start with DISABLED_.
-// Should not run.
-TEST(DISABLED_TestSuite, DISABLED_TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Test in disabled test case should not be run.";
-}
-
-// Check that when all tests in a test case are disabled, SetUpTestSuite() and
-// TearDownTestSuite() are not called.
-class DisabledTestsTest : public Test {
- protected:
-  static void SetUpTestSuite() {
-    FAIL() << "Unexpected failure: All tests disabled in test case. "
-              "SetUpTestSuite() should not be called.";
-  }
-
-  static void TearDownTestSuite() {
-    FAIL() << "Unexpected failure: All tests disabled in test case. "
-              "TearDownTestSuite() should not be called.";
-  }
-};
-
-TEST_F(DisabledTestsTest, DISABLED_TestShouldNotRun_1) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-TEST_F(DisabledTestsTest, DISABLED_TestShouldNotRun_2) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-// Tests that disabled typed tests aren't run.
-
-template <typename T>
-class TypedTest : public Test {
-};
-
-typedef testing::Types<int, double> NumericTypes;
-TYPED_TEST_SUITE(TypedTest, NumericTypes);
-
-TYPED_TEST(TypedTest, DISABLED_ShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled typed test should not run.";
-}
-
-template <typename T>
-class DISABLED_TypedTest : public Test {
-};
-
-TYPED_TEST_SUITE(DISABLED_TypedTest, NumericTypes);
-
-TYPED_TEST(DISABLED_TypedTest, ShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled typed test should not run.";
-}
-
-// Tests that disabled type-parameterized tests aren't run.
-
-template <typename T>
-class TypedTestP : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP);
-
-TYPED_TEST_P(TypedTestP, DISABLED_ShouldNotRun) {
-  FAIL() << "Unexpected failure: "
-         << "Disabled type-parameterized test should not run.";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP, DISABLED_ShouldNotRun);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TypedTestP, NumericTypes);
-
-template <typename T>
-class DISABLED_TypedTestP : public Test {
-};
-
-TYPED_TEST_SUITE_P(DISABLED_TypedTestP);
-
-TYPED_TEST_P(DISABLED_TypedTestP, ShouldNotRun) {
-  FAIL() << "Unexpected failure: "
-         << "Disabled type-parameterized test should not run.";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(DISABLED_TypedTestP, ShouldNotRun);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, DISABLED_TypedTestP, NumericTypes);
-
-// Tests that assertion macros evaluate their arguments exactly once.
-
-class SingleEvaluationTest : public Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  // This helper function is needed by the FailedASSERT_STREQ test
-  // below.  It's public to work around C++Builder's bug with scoping local
-  // classes.
-  static void CompareAndIncrementCharPtrs() {
-    ASSERT_STREQ(p1_++, p2_++);
-  }
-
-  // This helper function is needed by the FailedASSERT_NE test below.  It's
-  // public to work around C++Builder's bug with scoping local classes.
-  static void CompareAndIncrementInts() {
-    ASSERT_NE(a_++, b_++);
-  }
-
- protected:
-  SingleEvaluationTest() {
-    p1_ = s1_;
-    p2_ = s2_;
-    a_ = 0;
-    b_ = 0;
-  }
-
-  static const char* const s1_;
-  static const char* const s2_;
-  static const char* p1_;
-  static const char* p2_;
-
-  static int a_;
-  static int b_;
-};
-
-const char* const SingleEvaluationTest::s1_ = "01234";
-const char* const SingleEvaluationTest::s2_ = "abcde";
-const char* SingleEvaluationTest::p1_;
-const char* SingleEvaluationTest::p2_;
-int SingleEvaluationTest::a_;
-int SingleEvaluationTest::b_;
-
-// Tests that when ASSERT_STREQ fails, it evaluates its arguments
-// exactly once.
-TEST_F(SingleEvaluationTest, FailedASSERT_STREQ) {
-  EXPECT_FATAL_FAILURE(SingleEvaluationTest::CompareAndIncrementCharPtrs(),
-                       "p2_++");
-  EXPECT_EQ(s1_ + 1, p1_);
-  EXPECT_EQ(s2_ + 1, p2_);
-}
-
-// Tests that string assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, ASSERT_STR) {
-  // successful EXPECT_STRNE
-  EXPECT_STRNE(p1_++, p2_++);
-  EXPECT_EQ(s1_ + 1, p1_);
-  EXPECT_EQ(s2_ + 1, p2_);
-
-  // failed EXPECT_STRCASEEQ
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASEEQ(p1_++, p2_++),
-                          "Ignoring case");
-  EXPECT_EQ(s1_ + 2, p1_);
-  EXPECT_EQ(s2_ + 2, p2_);
-}
-
-// Tests that when ASSERT_NE fails, it evaluates its arguments exactly
-// once.
-TEST_F(SingleEvaluationTest, FailedASSERT_NE) {
-  EXPECT_FATAL_FAILURE(SingleEvaluationTest::CompareAndIncrementInts(),
-                       "(a_++) != (b_++)");
-  EXPECT_EQ(1, a_);
-  EXPECT_EQ(1, b_);
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, OtherCases) {
-  // successful EXPECT_TRUE
-  EXPECT_TRUE(0 == a_++);  // NOLINT
-  EXPECT_EQ(1, a_);
-
-  // failed EXPECT_TRUE
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(-1 == a_++), "-1 == a_++");
-  EXPECT_EQ(2, a_);
-
-  // successful EXPECT_GT
-  EXPECT_GT(a_++, b_++);
-  EXPECT_EQ(3, a_);
-  EXPECT_EQ(1, b_);
-
-  // failed EXPECT_LT
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(a_++, b_++), "(a_++) < (b_++)");
-  EXPECT_EQ(4, a_);
-  EXPECT_EQ(2, b_);
-
-  // successful ASSERT_TRUE
-  ASSERT_TRUE(0 < a_++);  // NOLINT
-  EXPECT_EQ(5, a_);
-
-  // successful ASSERT_GT
-  ASSERT_GT(a_++, b_++);
-  EXPECT_EQ(6, a_);
-  EXPECT_EQ(3, b_);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-#if GTEST_HAS_RTTI
-
-#ifdef _MSC_VER
-#define ERROR_DESC "class std::runtime_error"
-#else
-#define ERROR_DESC "std::runtime_error"
-#endif
-
-#else  // GTEST_HAS_RTTI
-
-#define ERROR_DESC "an std::exception-derived error"
-
-#endif  // GTEST_HAS_RTTI
-
-void ThrowAnInteger() {
-  throw 1;
-}
-void ThrowRuntimeError(const char* what) {
-  throw std::runtime_error(what);
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, ExceptionTests) {
-  // successful EXPECT_THROW
-  EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }, int);
-  EXPECT_EQ(1, a_);
-
-  // failed EXPECT_THROW, throws different
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }, bool), "throws a different type");
-  EXPECT_EQ(2, a_);
-
-  // failed EXPECT_THROW, throws runtime error
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowRuntimeError("A description");
-  }, bool), "throws " ERROR_DESC " with description \"A description\"");
-  EXPECT_EQ(3, a_);
-
-  // failed EXPECT_THROW, throws nothing
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(a_++, bool), "throws nothing");
-  EXPECT_EQ(4, a_);
-
-  // successful EXPECT_NO_THROW
-  EXPECT_NO_THROW(a_++);
-  EXPECT_EQ(5, a_);
-
-  // failed EXPECT_NO_THROW
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }), "it throws");
-  EXPECT_EQ(6, a_);
-
-  // successful EXPECT_ANY_THROW
-  EXPECT_ANY_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  });
-  EXPECT_EQ(7, a_);
-
-  // failed EXPECT_ANY_THROW
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(a_++), "it doesn't");
-  EXPECT_EQ(8, a_);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests {ASSERT|EXPECT}_NO_FATAL_FAILURE.
-class NoFatalFailureTest : public Test {
- protected:
-  void Succeeds() {}
-  void FailsNonFatal() {
-    ADD_FAILURE() << "some non-fatal failure";
-  }
-  void Fails() {
-    FAIL() << "some fatal failure";
-  }
-
-  void DoAssertNoFatalFailureOnFails() {
-    ASSERT_NO_FATAL_FAILURE(Fails());
-    ADD_FAILURE() << "should not reach here.";
-  }
-
-  void DoExpectNoFatalFailureOnFails() {
-    EXPECT_NO_FATAL_FAILURE(Fails());
-    ADD_FAILURE() << "other failure";
-  }
-};
-
-TEST_F(NoFatalFailureTest, NoFailure) {
-  EXPECT_NO_FATAL_FAILURE(Succeeds());
-  ASSERT_NO_FATAL_FAILURE(Succeeds());
-}
-
-TEST_F(NoFatalFailureTest, NonFatalIsNoFailure) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_NO_FATAL_FAILURE(FailsNonFatal()),
-      "some non-fatal failure");
-  EXPECT_NONFATAL_FAILURE(
-      ASSERT_NO_FATAL_FAILURE(FailsNonFatal()),
-      "some non-fatal failure");
-}
-
-TEST_F(NoFatalFailureTest, AssertNoFatalFailureOnFatalFailure) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    DoAssertNoFatalFailureOnFails();
-  }
-  ASSERT_EQ(2, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "some fatal failure",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "it does",
-                      gtest_failures.GetTestPartResult(1).message());
-}
-
-TEST_F(NoFatalFailureTest, ExpectNoFatalFailureOnFatalFailure) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    DoExpectNoFatalFailureOnFails();
-  }
-  ASSERT_EQ(3, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(2).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "some fatal failure",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "it does",
-                      gtest_failures.GetTestPartResult(1).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "other failure",
-                      gtest_failures.GetTestPartResult(2).message());
-}
-
-TEST_F(NoFatalFailureTest, MessageIsStreamable) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    EXPECT_NO_FATAL_FAILURE(FAIL() << "foo") << "my message";
-  }
-  ASSERT_EQ(2, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "foo",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "my message",
-                      gtest_failures.GetTestPartResult(1).message());
-}
-
-// Tests non-string assertions.
-
-std::string EditsToString(const std::vector<EditType>& edits) {
-  std::string out;
-  for (size_t i = 0; i < edits.size(); ++i) {
-    static const char kEdits[] = " +-/";
-    out.append(1, kEdits[edits[i]]);
-  }
-  return out;
-}
-
-std::vector<size_t> CharsToIndices(const std::string& str) {
-  std::vector<size_t> out;
-  for (size_t i = 0; i < str.size(); ++i) {
-    out.push_back(static_cast<size_t>(str[i]));
-  }
-  return out;
-}
-
-std::vector<std::string> CharsToLines(const std::string& str) {
-  std::vector<std::string> out;
-  for (size_t i = 0; i < str.size(); ++i) {
-    out.push_back(str.substr(i, 1));
-  }
-  return out;
-}
-
-TEST(EditDistance, TestSuites) {
-  struct Case {
-    int line;
-    const char* left;
-    const char* right;
-    const char* expected_edits;
-    const char* expected_diff;
-  };
-  static const Case kCases[] = {
-      // No change.
-      {__LINE__, "A", "A", " ", ""},
-      {__LINE__, "ABCDE", "ABCDE", "     ", ""},
-      // Simple adds.
-      {__LINE__, "X", "XA", " +", "@@ +1,2 @@\n X\n+A\n"},
-      {__LINE__, "X", "XABCD", " ++++", "@@ +1,5 @@\n X\n+A\n+B\n+C\n+D\n"},
-      // Simple removes.
-      {__LINE__, "XA", "X", " -", "@@ -1,2 @@\n X\n-A\n"},
-      {__LINE__, "XABCD", "X", " ----", "@@ -1,5 @@\n X\n-A\n-B\n-C\n-D\n"},
-      // Simple replaces.
-      {__LINE__, "A", "a", "/", "@@ -1,1 +1,1 @@\n-A\n+a\n"},
-      {__LINE__, "ABCD", "abcd", "////",
-       "@@ -1,4 +1,4 @@\n-A\n-B\n-C\n-D\n+a\n+b\n+c\n+d\n"},
-      // Path finding.
-      {__LINE__, "ABCDEFGH", "ABXEGH1", "  -/ -  +",
-       "@@ -1,8 +1,7 @@\n A\n B\n-C\n-D\n+X\n E\n-F\n G\n H\n+1\n"},
-      {__LINE__, "AAAABCCCC", "ABABCDCDC", "- /   + / ",
-       "@@ -1,9 +1,9 @@\n-A\n A\n-A\n+B\n A\n B\n C\n+D\n C\n-C\n+D\n C\n"},
-      {__LINE__, "ABCDE", "BCDCD", "-   +/",
-       "@@ -1,5 +1,5 @@\n-A\n B\n C\n D\n-E\n+C\n+D\n"},
-      {__LINE__, "ABCDEFGHIJKL", "BCDCDEFGJKLJK", "- ++     --   ++",
-       "@@ -1,4 +1,5 @@\n-A\n B\n+C\n+D\n C\n D\n"
-       "@@ -6,7 +7,7 @@\n F\n G\n-H\n-I\n J\n K\n L\n+J\n+K\n"},
-      {}};
-  for (const Case* c = kCases; c->left; ++c) {
-    EXPECT_TRUE(c->expected_edits ==
-                EditsToString(CalculateOptimalEdits(CharsToIndices(c->left),
-                                                    CharsToIndices(c->right))))
-        << "Left <" << c->left << "> Right <" << c->right << "> Edits <"
-        << EditsToString(CalculateOptimalEdits(
-               CharsToIndices(c->left), CharsToIndices(c->right))) << ">";
-    EXPECT_TRUE(c->expected_diff == CreateUnifiedDiff(CharsToLines(c->left),
-                                                      CharsToLines(c->right)))
-        << "Left <" << c->left << "> Right <" << c->right << "> Diff <"
-        << CreateUnifiedDiff(CharsToLines(c->left), CharsToLines(c->right))
-        << ">";
-  }
-}
-
-// Tests EqFailure(), used for implementing *EQ* assertions.
-TEST(AssertionTest, EqFailure) {
-  const std::string foo_val("5"), bar_val("6");
-  const std::string msg1(
-      EqFailure("foo", "bar", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: 5\n"
-      "  bar\n"
-      "    Which is: 6",
-      msg1.c_str());
-
-  const std::string msg2(
-      EqFailure("foo", "6", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: 5\n"
-      "  6",
-      msg2.c_str());
-
-  const std::string msg3(
-      EqFailure("5", "bar", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  5\n"
-      "  bar\n"
-      "    Which is: 6",
-      msg3.c_str());
-
-  const std::string msg4(
-      EqFailure("5", "6", foo_val, bar_val, false).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  5\n"
-      "  6",
-      msg4.c_str());
-
-  const std::string msg5(
-      EqFailure("foo", "bar",
-                std::string("\"x\""), std::string("\"y\""),
-                true).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: \"x\"\n"
-      "  bar\n"
-      "    Which is: \"y\"\n"
-      "Ignoring case",
-      msg5.c_str());
-}
-
-TEST(AssertionTest, EqFailureWithDiff) {
-  const std::string left(
-      "1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15");
-  const std::string right(
-      "1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14");
-  const std::string msg1(
-      EqFailure("left", "right", left, right, false).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  left\n"
-      "    Which is: "
-      "1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15\n"
-      "  right\n"
-      "    Which is: 1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14\n"
-      "With diff:\n@@ -1,5 +1,6 @@\n 1\n-2XXX\n+2\n 3\n+4\n 5\n 6\n"
-      "@@ -7,8 +8,6 @@\n 8\n 9\n-10\n 11\n-12XXX\n+12\n 13\n 14\n-15\n",
-      msg1.c_str());
-}
-
-// Tests AppendUserMessage(), used for implementing the *EQ* macros.
-TEST(AssertionTest, AppendUserMessage) {
-  const std::string foo("foo");
-
-  Message msg;
-  EXPECT_STREQ("foo",
-               AppendUserMessage(foo, msg).c_str());
-
-  msg << "bar";
-  EXPECT_STREQ("foo\nbar",
-               AppendUserMessage(foo, msg).c_str());
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-// Tests ASSERT_TRUE.
-TEST(AssertionTest, ASSERT_TRUE) {
-  ASSERT_TRUE(2 > 1);  // NOLINT
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(2 < 1),
-                       "2 < 1");
-}
-
-// Tests ASSERT_TRUE(predicate) for predicates returning AssertionResult.
-TEST(AssertionTest, AssertTrueWithAssertionResult) {
-  ASSERT_TRUE(ResultIsEven(2));
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEven(3)),
-                       "Value of: ResultIsEven(3)\n"
-                       "  Actual: false (3 is odd)\n"
-                       "Expected: true");
-#endif
-  ASSERT_TRUE(ResultIsEvenNoExplanation(2));
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEvenNoExplanation(3)),
-                       "Value of: ResultIsEvenNoExplanation(3)\n"
-                       "  Actual: false (3 is odd)\n"
-                       "Expected: true");
-}
-
-// Tests ASSERT_FALSE.
-TEST(AssertionTest, ASSERT_FALSE) {
-  ASSERT_FALSE(2 < 1);  // NOLINT
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(2 > 1),
-                       "Value of: 2 > 1\n"
-                       "  Actual: true\n"
-                       "Expected: false");
-}
-
-// Tests ASSERT_FALSE(predicate) for predicates returning AssertionResult.
-TEST(AssertionTest, AssertFalseWithAssertionResult) {
-  ASSERT_FALSE(ResultIsEven(3));
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEven(2)),
-                       "Value of: ResultIsEven(2)\n"
-                       "  Actual: true (2 is even)\n"
-                       "Expected: false");
-#endif
-  ASSERT_FALSE(ResultIsEvenNoExplanation(3));
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEvenNoExplanation(2)),
-                       "Value of: ResultIsEvenNoExplanation(2)\n"
-                       "  Actual: true\n"
-                       "Expected: false");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-// Tests using ASSERT_EQ on double values.  The purpose is to make
-// sure that the specialization we did for integer and anonymous enums
-// isn't used for double arguments.
-TEST(ExpectTest, ASSERT_EQ_Double) {
-  // A success.
-  ASSERT_EQ(5.6, 5.6);
-
-  // A failure.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(5.1, 5.2),
-                       "5.1");
-}
-
-// Tests ASSERT_EQ.
-TEST(AssertionTest, ASSERT_EQ) {
-  ASSERT_EQ(5, 2 + 3);
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(5, 2*3),
-                       "Expected equality of these values:\n"
-                       "  5\n"
-                       "  2*3\n"
-                       "    Which is: 6");
-}
-
-// Tests ASSERT_EQ(NULL, pointer).
-TEST(AssertionTest, ASSERT_EQ_NULL) {
-  // A success.
-  const char* p = nullptr;
-  ASSERT_EQ(nullptr, p);
-
-  // A failure.
-  static int n = 0;
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(nullptr, &n), "  &n\n    Which is:");
-}
-
-// Tests ASSERT_EQ(0, non_pointer).  Since the literal 0 can be
-// treated as a null pointer by the compiler, we need to make sure
-// that ASSERT_EQ(0, non_pointer) isn't interpreted by Google Test as
-// ASSERT_EQ(static_cast<void*>(NULL), non_pointer).
-TEST(ExpectTest, ASSERT_EQ_0) {
-  int n = 0;
-
-  // A success.
-  ASSERT_EQ(0, n);
-
-  // A failure.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(0, 5.6),
-                       "  0\n  5.6");
-}
-
-// Tests ASSERT_NE.
-TEST(AssertionTest, ASSERT_NE) {
-  ASSERT_NE(6, 7);
-  EXPECT_FATAL_FAILURE(ASSERT_NE('a', 'a'),
-                       "Expected: ('a') != ('a'), "
-                       "actual: 'a' (97, 0x61) vs 'a' (97, 0x61)");
-}
-
-// Tests ASSERT_LE.
-TEST(AssertionTest, ASSERT_LE) {
-  ASSERT_LE(2, 3);
-  ASSERT_LE(2, 2);
-  EXPECT_FATAL_FAILURE(ASSERT_LE(2, 0),
-                       "Expected: (2) <= (0), actual: 2 vs 0");
-}
-
-// Tests ASSERT_LT.
-TEST(AssertionTest, ASSERT_LT) {
-  ASSERT_LT(2, 3);
-  EXPECT_FATAL_FAILURE(ASSERT_LT(2, 2),
-                       "Expected: (2) < (2), actual: 2 vs 2");
-}
-
-// Tests ASSERT_GE.
-TEST(AssertionTest, ASSERT_GE) {
-  ASSERT_GE(2, 1);
-  ASSERT_GE(2, 2);
-  EXPECT_FATAL_FAILURE(ASSERT_GE(2, 3),
-                       "Expected: (2) >= (3), actual: 2 vs 3");
-}
-
-// Tests ASSERT_GT.
-TEST(AssertionTest, ASSERT_GT) {
-  ASSERT_GT(2, 1);
-  EXPECT_FATAL_FAILURE(ASSERT_GT(2, 2),
-                       "Expected: (2) > (2), actual: 2 vs 2");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowNothing() {}
-
-// Tests ASSERT_THROW.
-TEST(AssertionTest, ASSERT_THROW) {
-  ASSERT_THROW(ThrowAnInteger(), int);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowAnInteger(), bool),
-      "Expected: ThrowAnInteger() throws an exception of type bool.\n"
-      "  Actual: it throws a different type.");
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowRuntimeError("A description"), std::logic_error),
-      "Expected: ThrowRuntimeError(\"A description\") "
-      "throws an exception of type std::logic_error.\n  "
-      "Actual: it throws " ERROR_DESC " "
-      "with description \"A description\".");
-# endif
-
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowNothing(), bool),
-      "Expected: ThrowNothing() throws an exception of type bool.\n"
-      "  Actual: it throws nothing.");
-}
-
-// Tests ASSERT_NO_THROW.
-TEST(AssertionTest, ASSERT_NO_THROW) {
-  ASSERT_NO_THROW(ThrowNothing());
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()),
-                       "Expected: ThrowAnInteger() doesn't throw an exception."
-                       "\n  Actual: it throws.");
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowRuntimeError("A description")),
-                       "Expected: ThrowRuntimeError(\"A description\") "
-                       "doesn't throw an exception.\n  "
-                       "Actual: it throws " ERROR_DESC " "
-                       "with description \"A description\".");
-}
-
-// Tests ASSERT_ANY_THROW.
-TEST(AssertionTest, ASSERT_ANY_THROW) {
-  ASSERT_ANY_THROW(ThrowAnInteger());
-  EXPECT_FATAL_FAILURE(
-      ASSERT_ANY_THROW(ThrowNothing()),
-      "Expected: ThrowNothing() throws an exception.\n"
-      "  Actual: it doesn't.");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Makes sure we deal with the precedence of <<.  This test should
-// compile.
-TEST(AssertionTest, AssertPrecedence) {
-  ASSERT_EQ(1 < 2, true);
-  bool false_value = false;
-  ASSERT_EQ(true && false_value, false);
-}
-
-// A subroutine used by the following test.
-void TestEq1(int x) {
-  ASSERT_EQ(1, x);
-}
-
-// Tests calling a test subroutine that's not part of a fixture.
-TEST(AssertionTest, NonFixtureSubroutine) {
-  EXPECT_FATAL_FAILURE(TestEq1(2),
-                       "  x\n    Which is: 2");
-}
-
-// An uncopyable class.
-class Uncopyable {
- public:
-  explicit Uncopyable(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
-  bool operator==(const Uncopyable& rhs) const {
-    return value() == rhs.value();
-  }
- private:
-  // This constructor deliberately has no implementation, as we don't
-  // want this class to be copyable.
-  Uncopyable(const Uncopyable&);  // NOLINT
-
-  int value_;
-};
-
-::std::ostream& operator<<(::std::ostream& os, const Uncopyable& value) {
-  return os << value.value();
-}
-
-
-bool IsPositiveUncopyable(const Uncopyable& x) {
-  return x.value() > 0;
-}
-
-// A subroutine used by the following test.
-void TestAssertNonPositive() {
-  Uncopyable y(-1);
-  ASSERT_PRED1(IsPositiveUncopyable, y);
-}
-// A subroutine used by the following test.
-void TestAssertEqualsUncopyable() {
-  Uncopyable x(5);
-  Uncopyable y(-1);
-  ASSERT_EQ(x, y);
-}
-
-// Tests that uncopyable objects can be used in assertions.
-TEST(AssertionTest, AssertWorksWithUncopyableObject) {
-  Uncopyable x(5);
-  ASSERT_PRED1(IsPositiveUncopyable, x);
-  ASSERT_EQ(x, x);
-  EXPECT_FATAL_FAILURE(TestAssertNonPositive(),
-    "IsPositiveUncopyable(y) evaluates to false, where\ny evaluates to -1");
-  EXPECT_FATAL_FAILURE(TestAssertEqualsUncopyable(),
-                       "Expected equality of these values:\n"
-                       "  x\n    Which is: 5\n  y\n    Which is: -1");
-}
-
-// Tests that uncopyable objects can be used in expects.
-TEST(AssertionTest, ExpectWorksWithUncopyableObject) {
-  Uncopyable x(5);
-  EXPECT_PRED1(IsPositiveUncopyable, x);
-  Uncopyable y(-1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED1(IsPositiveUncopyable, y),
-    "IsPositiveUncopyable(y) evaluates to false, where\ny evaluates to -1");
-  EXPECT_EQ(x, x);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y),
-                          "Expected equality of these values:\n"
-                          "  x\n    Which is: 5\n  y\n    Which is: -1");
-}
-
-enum NamedEnum {
-  kE1 = 0,
-  kE2 = 1
-};
-
-TEST(AssertionTest, NamedEnum) {
-  EXPECT_EQ(kE1, kE1);
-  EXPECT_LT(kE1, kE2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(kE1, kE2), "Which is: 0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(kE1, kE2), "Which is: 1");
-}
-
-// Sun Studio and HP aCC2reject this code.
-#if !defined(__SUNPRO_CC) && !defined(__HP_aCC)
-
-// Tests using assertions with anonymous enums.
-enum {
-  kCaseA = -1,
-
-# if GTEST_OS_LINUX
-
-  // We want to test the case where the size of the anonymous enum is
-  // larger than sizeof(int), to make sure our implementation of the
-  // assertions doesn't truncate the enums.  However, MSVC
-  // (incorrectly) doesn't allow an enum value to exceed the range of
-  // an int, so this has to be conditionally compiled.
-  //
-  // On Linux, kCaseB and kCaseA have the same value when truncated to
-  // int size.  We want to test whether this will confuse the
-  // assertions.
-  kCaseB = testing::internal::kMaxBiggestInt,
-
-# else
-
-  kCaseB = INT_MAX,
-
-# endif  // GTEST_OS_LINUX
-
-  kCaseC = 42
-};
-
-TEST(AssertionTest, AnonymousEnum) {
-# if GTEST_OS_LINUX
-
-  EXPECT_EQ(static_cast<int>(kCaseA), static_cast<int>(kCaseB));
-
-# endif  // GTEST_OS_LINUX
-
-  EXPECT_EQ(kCaseA, kCaseA);
-  EXPECT_NE(kCaseA, kCaseB);
-  EXPECT_LT(kCaseA, kCaseB);
-  EXPECT_LE(kCaseA, kCaseB);
-  EXPECT_GT(kCaseB, kCaseA);
-  EXPECT_GE(kCaseA, kCaseA);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(kCaseA, kCaseB),
-                          "(kCaseA) >= (kCaseB)");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(kCaseA, kCaseC),
-                          "-1 vs 42");
-
-  ASSERT_EQ(kCaseA, kCaseA);
-  ASSERT_NE(kCaseA, kCaseB);
-  ASSERT_LT(kCaseA, kCaseB);
-  ASSERT_LE(kCaseA, kCaseB);
-  ASSERT_GT(kCaseB, kCaseA);
-  ASSERT_GE(kCaseA, kCaseA);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseB),
-                       "  kCaseB\n    Which is: ");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
-                       "\n    Which is: 42");
-# endif
-
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
-                       "\n    Which is: -1");
-}
-
-#endif  // !GTEST_OS_MAC && !defined(__SUNPRO_CC)
-
-#if GTEST_OS_WINDOWS
-
-static HRESULT UnexpectedHRESULTFailure() {
-  return E_UNEXPECTED;
-}
-
-static HRESULT OkHRESULTSuccess() {
-  return S_OK;
-}
-
-static HRESULT FalseHRESULTSuccess() {
-  return S_FALSE;
-}
-
-// HRESULT assertion tests test both zero and non-zero
-// success codes as well as failure message for each.
-//
-// Windows CE doesn't support message texts.
-TEST(HRESULTAssertionTest, EXPECT_HRESULT_SUCCEEDED) {
-  EXPECT_HRESULT_SUCCEEDED(S_OK);
-  EXPECT_HRESULT_SUCCEEDED(S_FALSE);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_SUCCEEDED(UnexpectedHRESULTFailure()),
-    "Expected: (UnexpectedHRESULTFailure()) succeeds.\n"
-    "  Actual: 0x8000FFFF");
-}
-
-TEST(HRESULTAssertionTest, ASSERT_HRESULT_SUCCEEDED) {
-  ASSERT_HRESULT_SUCCEEDED(S_OK);
-  ASSERT_HRESULT_SUCCEEDED(S_FALSE);
-
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_SUCCEEDED(UnexpectedHRESULTFailure()),
-    "Expected: (UnexpectedHRESULTFailure()) succeeds.\n"
-    "  Actual: 0x8000FFFF");
-}
-
-TEST(HRESULTAssertionTest, EXPECT_HRESULT_FAILED) {
-  EXPECT_HRESULT_FAILED(E_UNEXPECTED);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_FAILED(OkHRESULTSuccess()),
-    "Expected: (OkHRESULTSuccess()) fails.\n"
-    "  Actual: 0x0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_FAILED(FalseHRESULTSuccess()),
-    "Expected: (FalseHRESULTSuccess()) fails.\n"
-    "  Actual: 0x1");
-}
-
-TEST(HRESULTAssertionTest, ASSERT_HRESULT_FAILED) {
-  ASSERT_HRESULT_FAILED(E_UNEXPECTED);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_FAILED(OkHRESULTSuccess()),
-    "Expected: (OkHRESULTSuccess()) fails.\n"
-    "  Actual: 0x0");
-# endif
-
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_FAILED(FalseHRESULTSuccess()),
-    "Expected: (FalseHRESULTSuccess()) fails.\n"
-    "  Actual: 0x1");
-}
-
-// Tests that streaming to the HRESULT macros works.
-TEST(HRESULTAssertionTest, Streaming) {
-  EXPECT_HRESULT_SUCCEEDED(S_OK) << "unexpected failure";
-  ASSERT_HRESULT_SUCCEEDED(S_OK) << "unexpected failure";
-  EXPECT_HRESULT_FAILED(E_UNEXPECTED) << "unexpected failure";
-  ASSERT_HRESULT_FAILED(E_UNEXPECTED) << "unexpected failure";
-
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_HRESULT_SUCCEEDED(E_UNEXPECTED) << "expected failure",
-      "expected failure");
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(
-      ASSERT_HRESULT_SUCCEEDED(E_UNEXPECTED) << "expected failure",
-      "expected failure");
-# endif
-
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_HRESULT_FAILED(S_OK) << "expected failure",
-      "expected failure");
-
-  EXPECT_FATAL_FAILURE(
-      ASSERT_HRESULT_FAILED(S_OK) << "expected failure",
-      "expected failure");
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-// The following code intentionally tests a suboptimal syntax.
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdangling-else"
-#pragma GCC diagnostic ignored "-Wempty-body"
-#pragma GCC diagnostic ignored "-Wpragmas"
-#endif
-// Tests that the assertion macros behave like single statements.
-TEST(AssertionSyntaxTest, BasicAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    ASSERT_TRUE(false) << "This should never be executed; "
-                          "It's a compilation test only.";
-
-  if (AlwaysTrue())
-    EXPECT_FALSE(false);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_LT(1, 3);
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    EXPECT_GT(3, 2) << "";
-}
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-#if GTEST_HAS_EXCEPTIONS
-// Tests that the compiler will not complain about unreachable code in the
-// EXPECT_THROW/EXPECT_ANY_THROW/EXPECT_NO_THROW macros.
-TEST(ExpectThrowTest, DoesNotGenerateUnreachableCodeWarning) {
-  int n = 0;
-
-  EXPECT_THROW(throw 1, int);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(n++, int), "");
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(throw 1, const char*), "");
-  EXPECT_NO_THROW(n++);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(throw 1), "");
-  EXPECT_ANY_THROW(throw 1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(n++), "");
-}
-
-TEST(ExpectThrowTest, DoesNotGenerateDuplicateCatchClauseWarning) {
-  EXPECT_THROW(throw std::exception(), std::exception);
-}
-
-// The following code intentionally tests a suboptimal syntax.
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdangling-else"
-#pragma GCC diagnostic ignored "-Wempty-body"
-#pragma GCC diagnostic ignored "-Wpragmas"
-#endif
-TEST(AssertionSyntaxTest, ExceptionAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    EXPECT_THROW(ThrowNothing(), bool);
-
-  if (AlwaysTrue())
-    EXPECT_THROW(ThrowAnInteger(), int);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    EXPECT_NO_THROW(ThrowAnInteger());
-
-  if (AlwaysTrue())
-    EXPECT_NO_THROW(ThrowNothing());
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    EXPECT_ANY_THROW(ThrowNothing());
-
-  if (AlwaysTrue())
-    EXPECT_ANY_THROW(ThrowAnInteger());
-  else
-    ;  // NOLINT
-}
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// The following code intentionally tests a suboptimal syntax.
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdangling-else"
-#pragma GCC diagnostic ignored "-Wempty-body"
-#pragma GCC diagnostic ignored "-Wpragmas"
-#endif
-TEST(AssertionSyntaxTest, NoFatalFailureAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    EXPECT_NO_FATAL_FAILURE(FAIL()) << "This should never be executed. "
-                                    << "It's a compilation test only.";
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_NO_FATAL_FAILURE(FAIL()) << "";
-  else
-    ;  // NOLINT
-
-  if (AlwaysTrue())
-    EXPECT_NO_FATAL_FAILURE(SUCCEED());
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    ASSERT_NO_FATAL_FAILURE(SUCCEED());
-}
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-// Tests that the assertion macros work well with switch statements.
-TEST(AssertionSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      ASSERT_TRUE(true);
-  }
-
-  switch (0)
-    case 0:
-      EXPECT_FALSE(false) << "EXPECT_FALSE failed in switch case";
-
-  // Binary assertions are implemented using a different code path
-  // than the Boolean assertions.  Hence we test them separately.
-  switch (0) {
-    case 1:
-    default:
-      ASSERT_EQ(1, 1) << "ASSERT_EQ failed in default switch handler";
-  }
-
-  switch (0)
-    case 0:
-      EXPECT_NE(1, 2);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowAString() {
-    throw "std::string";
-}
-
-// Test that the exception assertion macros compile and work with const
-// type qualifier.
-TEST(AssertionSyntaxTest, WorksWithConst) {
-    ASSERT_THROW(ThrowAString(), const char*);
-
-    EXPECT_THROW(ThrowAString(), const char*);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-}  // namespace
-
-namespace testing {
-
-// Tests that Google Test tracks SUCCEED*.
-TEST(SuccessfulAssertionTest, SUCCEED) {
-  SUCCEED();
-  SUCCEED() << "OK";
-  EXPECT_EQ(2, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful EXPECT_*.
-TEST(SuccessfulAssertionTest, EXPECT) {
-  EXPECT_TRUE(true);
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful EXPECT_STR*.
-TEST(SuccessfulAssertionTest, EXPECT_STR) {
-  EXPECT_STREQ("", "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful ASSERT_*.
-TEST(SuccessfulAssertionTest, ASSERT) {
-  ASSERT_TRUE(true);
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful ASSERT_STR*.
-TEST(SuccessfulAssertionTest, ASSERT_STR) {
-  ASSERT_STREQ("", "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-}  // namespace testing
-
-namespace {
-
-// Tests the message streaming variation of assertions.
-
-TEST(AssertionWithMessageTest, EXPECT) {
-  EXPECT_EQ(1, 1) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(1, 1) << "Expected failure #1.",
-                          "Expected failure #1");
-  EXPECT_LE(1, 2) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(1, 0) << "Expected failure #2.",
-                          "Expected failure #2.");
-  EXPECT_GE(1, 0) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(1, 2) << "Expected failure #3.",
-                          "Expected failure #3.");
-
-  EXPECT_STREQ("1", "1") << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE("1", "1") << "Expected failure #4.",
-                          "Expected failure #4.");
-  EXPECT_STRCASEEQ("a", "A") << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASENE("a", "A") << "Expected failure #5.",
-                          "Expected failure #5.");
-
-  EXPECT_FLOAT_EQ(1, 1) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1, 1.2) << "Expected failure #6.",
-                          "Expected failure #6.");
-  EXPECT_NEAR(1, 1.1, 0.2) << "This should succeed.";
-}
-
-TEST(AssertionWithMessageTest, ASSERT) {
-  ASSERT_EQ(1, 1) << "This should succeed.";
-  ASSERT_NE(1, 2) << "This should succeed.";
-  ASSERT_LE(1, 2) << "This should succeed.";
-  ASSERT_LT(1, 2) << "This should succeed.";
-  ASSERT_GE(1, 0) << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_GT(1, 2) << "Expected failure.",
-                       "Expected failure.");
-}
-
-TEST(AssertionWithMessageTest, ASSERT_STR) {
-  ASSERT_STREQ("1", "1") << "This should succeed.";
-  ASSERT_STRNE("1", "2") << "This should succeed.";
-  ASSERT_STRCASEEQ("a", "A") << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("a", "A") << "Expected failure.",
-                       "Expected failure.");
-}
-
-TEST(AssertionWithMessageTest, ASSERT_FLOATING) {
-  ASSERT_FLOAT_EQ(1, 1) << "This should succeed.";
-  ASSERT_DOUBLE_EQ(1, 1) << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1, 1.2, 0.1) << "Expect failure.",  // NOLINT
-                       "Expect failure.");
-}
-
-// Tests using ASSERT_FALSE with a streamed message.
-TEST(AssertionWithMessageTest, ASSERT_FALSE) {
-  ASSERT_FALSE(false) << "This shouldn't fail.";
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_FALSE(true) << "Expected failure: " << 2 << " > " << 1
-                       << " evaluates to " << true;
-  }, "Expected failure");
-}
-
-// Tests using FAIL with a streamed message.
-TEST(AssertionWithMessageTest, FAIL) {
-  EXPECT_FATAL_FAILURE(FAIL() << 0,
-                       "0");
-}
-
-// Tests using SUCCEED with a streamed message.
-TEST(AssertionWithMessageTest, SUCCEED) {
-  SUCCEED() << "Success == " << 1;
-}
-
-// Tests using ASSERT_TRUE with a streamed message.
-TEST(AssertionWithMessageTest, ASSERT_TRUE) {
-  ASSERT_TRUE(true) << "This should succeed.";
-  ASSERT_TRUE(true) << true;
-  EXPECT_FATAL_FAILURE(
-      {  // NOLINT
-        ASSERT_TRUE(false) << static_cast<const char*>(nullptr)
-                           << static_cast<char*>(nullptr);
-      },
-      "(null)(null)");
-}
-
-#if GTEST_OS_WINDOWS
-// Tests using wide strings in assertion messages.
-TEST(AssertionWithMessageTest, WideStringMessage) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_TRUE(false) << L"This failure is expected.\x8119";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EQ(1, 2) << "This failure is "
-                    << L"expected too.\x8120";
-  }, "This failure is expected too.");
-}
-#endif  // GTEST_OS_WINDOWS
-
-// Tests EXPECT_TRUE.
-TEST(ExpectTest, EXPECT_TRUE) {
-  EXPECT_TRUE(true) << "Intentional success";
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "Intentional failure #1.",
-                          "Intentional failure #1.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "Intentional failure #2.",
-                          "Intentional failure #2.");
-  EXPECT_TRUE(2 > 1);  // NOLINT
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(2 < 1),
-                          "Value of: 2 < 1\n"
-                          "  Actual: false\n"
-                          "Expected: true");
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(2 > 3),
-                          "2 > 3");
-}
-
-// Tests EXPECT_TRUE(predicate) for predicates returning AssertionResult.
-TEST(ExpectTest, ExpectTrueWithAssertionResult) {
-  EXPECT_TRUE(ResultIsEven(2));
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEven(3)),
-                          "Value of: ResultIsEven(3)\n"
-                          "  Actual: false (3 is odd)\n"
-                          "Expected: true");
-  EXPECT_TRUE(ResultIsEvenNoExplanation(2));
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEvenNoExplanation(3)),
-                          "Value of: ResultIsEvenNoExplanation(3)\n"
-                          "  Actual: false (3 is odd)\n"
-                          "Expected: true");
-}
-
-// Tests EXPECT_FALSE with a streamed message.
-TEST(ExpectTest, EXPECT_FALSE) {
-  EXPECT_FALSE(2 < 1);  // NOLINT
-  EXPECT_FALSE(false) << "Intentional success";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "Intentional failure #1.",
-                          "Intentional failure #1.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "Intentional failure #2.",
-                          "Intentional failure #2.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(2 > 1),
-                          "Value of: 2 > 1\n"
-                          "  Actual: true\n"
-                          "Expected: false");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(2 < 3),
-                          "2 < 3");
-}
-
-// Tests EXPECT_FALSE(predicate) for predicates returning AssertionResult.
-TEST(ExpectTest, ExpectFalseWithAssertionResult) {
-  EXPECT_FALSE(ResultIsEven(3));
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEven(2)),
-                          "Value of: ResultIsEven(2)\n"
-                          "  Actual: true (2 is even)\n"
-                          "Expected: false");
-  EXPECT_FALSE(ResultIsEvenNoExplanation(3));
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEvenNoExplanation(2)),
-                          "Value of: ResultIsEvenNoExplanation(2)\n"
-                          "  Actual: true\n"
-                          "Expected: false");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-// Tests EXPECT_EQ.
-TEST(ExpectTest, EXPECT_EQ) {
-  EXPECT_EQ(5, 2 + 3);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5, 2*3),
-                          "Expected equality of these values:\n"
-                          "  5\n"
-                          "  2*3\n"
-                          "    Which is: 6");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5, 2 - 3),
-                          "2 - 3");
-}
-
-// Tests using EXPECT_EQ on double values.  The purpose is to make
-// sure that the specialization we did for integer and anonymous enums
-// isn't used for double arguments.
-TEST(ExpectTest, EXPECT_EQ_Double) {
-  // A success.
-  EXPECT_EQ(5.6, 5.6);
-
-  // A failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5.1, 5.2),
-                          "5.1");
-}
-
-// Tests EXPECT_EQ(NULL, pointer).
-TEST(ExpectTest, EXPECT_EQ_NULL) {
-  // A success.
-  const char* p = nullptr;
-  EXPECT_EQ(nullptr, p);
-
-  // A failure.
-  int n = 0;
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(nullptr, &n), "  &n\n    Which is:");
-}
-
-// Tests EXPECT_EQ(0, non_pointer).  Since the literal 0 can be
-// treated as a null pointer by the compiler, we need to make sure
-// that EXPECT_EQ(0, non_pointer) isn't interpreted by Google Test as
-// EXPECT_EQ(static_cast<void*>(NULL), non_pointer).
-TEST(ExpectTest, EXPECT_EQ_0) {
-  int n = 0;
-
-  // A success.
-  EXPECT_EQ(0, n);
-
-  // A failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(0, 5.6),
-                          "  0\n  5.6");
-}
-
-// Tests EXPECT_NE.
-TEST(ExpectTest, EXPECT_NE) {
-  EXPECT_NE(6, 7);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE('a', 'a'),
-                          "Expected: ('a') != ('a'), "
-                          "actual: 'a' (97, 0x61) vs 'a' (97, 0x61)");
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(2, 2),
-                          "2");
-  char* const p0 = nullptr;
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(p0, p0),
-                          "p0");
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  char* const p1 = reinterpret_cast<char*>(pv1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(p1, p1),
-                          "p1");
-}
-
-// Tests EXPECT_LE.
-TEST(ExpectTest, EXPECT_LE) {
-  EXPECT_LE(2, 3);
-  EXPECT_LE(2, 2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_LE(2, 0),
-                          "Expected: (2) <= (0), actual: 2 vs 0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LE(1.1, 0.9),
-                          "(1.1) <= (0.9)");
-}
-
-// Tests EXPECT_LT.
-TEST(ExpectTest, EXPECT_LT) {
-  EXPECT_LT(2, 3);
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 2),
-                          "Expected: (2) < (2), actual: 2 vs 2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 1),
-                          "(2) < (1)");
-}
-
-// Tests EXPECT_GE.
-TEST(ExpectTest, EXPECT_GE) {
-  EXPECT_GE(2, 1);
-  EXPECT_GE(2, 2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(2, 3),
-                          "Expected: (2) >= (3), actual: 2 vs 3");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(0.9, 1.1),
-                          "(0.9) >= (1.1)");
-}
-
-// Tests EXPECT_GT.
-TEST(ExpectTest, EXPECT_GT) {
-  EXPECT_GT(2, 1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(2, 2),
-                          "Expected: (2) > (2), actual: 2 vs 2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(2, 3),
-                          "(2) > (3)");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests EXPECT_THROW.
-TEST(ExpectTest, EXPECT_THROW) {
-  EXPECT_THROW(ThrowAnInteger(), int);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool),
-                          "Expected: ThrowAnInteger() throws an exception of "
-                          "type bool.\n  Actual: it throws a different type.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowRuntimeError("A description"),
-                                       std::logic_error),
-                          "Expected: ThrowRuntimeError(\"A description\") "
-                          "throws an exception of type std::logic_error.\n  "
-                          "Actual: it throws " ERROR_DESC " "
-                          "with description \"A description\".");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW(ThrowNothing(), bool),
-      "Expected: ThrowNothing() throws an exception of type bool.\n"
-      "  Actual: it throws nothing.");
-}
-
-// Tests EXPECT_NO_THROW.
-TEST(ExpectTest, EXPECT_NO_THROW) {
-  EXPECT_NO_THROW(ThrowNothing());
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()),
-                          "Expected: ThrowAnInteger() doesn't throw an "
-                          "exception.\n  Actual: it throws.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowRuntimeError("A description")),
-                          "Expected: ThrowRuntimeError(\"A description\") "
-                          "doesn't throw an exception.\n  "
-                          "Actual: it throws " ERROR_DESC " "
-                          "with description \"A description\".");
-}
-
-// Tests EXPECT_ANY_THROW.
-TEST(ExpectTest, EXPECT_ANY_THROW) {
-  EXPECT_ANY_THROW(ThrowAnInteger());
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_ANY_THROW(ThrowNothing()),
-      "Expected: ThrowNothing() throws an exception.\n"
-      "  Actual: it doesn't.");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Make sure we deal with the precedence of <<.
-TEST(ExpectTest, ExpectPrecedence) {
-  EXPECT_EQ(1 < 2, true);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(true, true && false),
-                          "  true && false\n    Which is: false");
-}
-
-
-// Tests the StreamableToString() function.
-
-// Tests using StreamableToString() on a scalar.
-TEST(StreamableToStringTest, Scalar) {
-  EXPECT_STREQ("5", StreamableToString(5).c_str());
-}
-
-// Tests using StreamableToString() on a non-char pointer.
-TEST(StreamableToStringTest, Pointer) {
-  int n = 0;
-  int* p = &n;
-  EXPECT_STRNE("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using StreamableToString() on a NULL non-char pointer.
-TEST(StreamableToStringTest, NullPointer) {
-  int* p = nullptr;
-  EXPECT_STREQ("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using StreamableToString() on a C string.
-TEST(StreamableToStringTest, CString) {
-  EXPECT_STREQ("Foo", StreamableToString("Foo").c_str());
-}
-
-// Tests using StreamableToString() on a NULL C string.
-TEST(StreamableToStringTest, NullCString) {
-  char* p = nullptr;
-  EXPECT_STREQ("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using streamable values as assertion messages.
-
-// Tests using std::string as an assertion message.
-TEST(StreamableTest, string) {
-  static const std::string str(
-      "This failure message is a std::string, and is expected.");
-  EXPECT_FATAL_FAILURE(FAIL() << str,
-                       str.c_str());
-}
-
-// Tests that we can output strings containing embedded NULs.
-// Limited to Linux because we can only do this with std::string's.
-TEST(StreamableTest, stringWithEmbeddedNUL) {
-  static const char char_array_with_nul[] =
-      "Here's a NUL\0 and some more string";
-  static const std::string string_with_nul(char_array_with_nul,
-                                           sizeof(char_array_with_nul)
-                                           - 1);  // drops the trailing NUL
-  EXPECT_FATAL_FAILURE(FAIL() << string_with_nul,
-                       "Here's a NUL\\0 and some more string");
-}
-
-// Tests that we can output a NUL char.
-TEST(StreamableTest, NULChar) {
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    FAIL() << "A NUL" << '\0' << " and some more string";
-  }, "A NUL\\0 and some more string");
-}
-
-// Tests using int as an assertion message.
-TEST(StreamableTest, int) {
-  EXPECT_FATAL_FAILURE(FAIL() << 900913,
-                       "900913");
-}
-
-// Tests using NULL char pointer as an assertion message.
-//
-// In MSVC, streaming a NULL char * causes access violation.  Google Test
-// implemented a workaround (substituting "(null)" for NULL).  This
-// tests whether the workaround works.
-TEST(StreamableTest, NullCharPtr) {
-  EXPECT_FATAL_FAILURE(FAIL() << static_cast<const char*>(nullptr), "(null)");
-}
-
-// Tests that basic IO manipulators (endl, ends, and flush) can be
-// streamed to testing::Message.
-TEST(StreamableTest, BasicIoManip) {
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    FAIL() << "Line 1." << std::endl
-           << "A NUL char " << std::ends << std::flush << " in line 2.";
-  }, "Line 1.\nA NUL char \\0 in line 2.");
-}
-
-// Tests the macros that haven't been covered so far.
-
-void AddFailureHelper(bool* aborted) {
-  *aborted = true;
-  ADD_FAILURE() << "Intentional failure.";
-  *aborted = false;
-}
-
-// Tests ADD_FAILURE.
-TEST(MacroTest, ADD_FAILURE) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(AddFailureHelper(&aborted),
-                          "Intentional failure.");
-  EXPECT_FALSE(aborted);
-}
-
-// Tests ADD_FAILURE_AT.
-TEST(MacroTest, ADD_FAILURE_AT) {
-  // Verifies that ADD_FAILURE_AT does generate a nonfatal failure and
-  // the failure message contains the user-streamed part.
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE_AT("foo.cc", 42) << "Wrong!", "Wrong!");
-
-  // Verifies that the user-streamed part is optional.
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE_AT("foo.cc", 42), "Failed");
-
-  // Unfortunately, we cannot verify that the failure message contains
-  // the right file path and line number the same way, as
-  // EXPECT_NONFATAL_FAILURE() doesn't get to see the file path and
-  // line number.  Instead, we do that in googletest-output-test_.cc.
-}
-
-// Tests FAIL.
-TEST(MacroTest, FAIL) {
-  EXPECT_FATAL_FAILURE(FAIL(),
-                       "Failed");
-  EXPECT_FATAL_FAILURE(FAIL() << "Intentional failure.",
-                       "Intentional failure.");
-}
-
-// Tests GTEST_FAIL_AT.
-TEST(MacroTest, GTEST_FAIL_AT) {
-  // Verifies that GTEST_FAIL_AT does generate a fatal failure and
-  // the failure message contains the user-streamed part.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL_AT("foo.cc", 42) << "Wrong!", "Wrong!");
-
-  // Verifies that the user-streamed part is optional.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL_AT("foo.cc", 42), "Failed");
-
-  // See the ADD_FAIL_AT test above to see how we test that the failure message
-  // contains the right filename and line number -- the same applies here.
-}
-
-// Tests SUCCEED
-TEST(MacroTest, SUCCEED) {
-  SUCCEED();
-  SUCCEED() << "Explicit success.";
-}
-
-// Tests for EXPECT_EQ() and ASSERT_EQ().
-//
-// These tests fail *intentionally*, s.t. the failure messages can be
-// generated and tested.
-//
-// We have different tests for different argument types.
-
-// Tests using bool values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Bool) {
-  EXPECT_EQ(true,  true);
-  EXPECT_FATAL_FAILURE({
-      bool false_value = false;
-      ASSERT_EQ(false_value, true);
-    }, "  false_value\n    Which is: false\n  true");
-}
-
-// Tests using int values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Int) {
-  ASSERT_EQ(32, 32);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(32, 33),
-                          "  32\n  33");
-}
-
-// Tests using time_t values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Time_T) {
-  EXPECT_EQ(static_cast<time_t>(0),
-            static_cast<time_t>(0));
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<time_t>(0),
-                                 static_cast<time_t>(1234)),
-                       "1234");
-}
-
-// Tests using char values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Char) {
-  ASSERT_EQ('z', 'z');
-  const char ch = 'b';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ('\0', ch),
-                          "  ch\n    Which is: 'b'");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ('a', ch),
-                          "  ch\n    Which is: 'b'");
-}
-
-// Tests using wchar_t values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, WideChar) {
-  EXPECT_EQ(L'b', L'b');
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(L'\0', L'x'),
-                          "Expected equality of these values:\n"
-                          "  L'\0'\n"
-                          "    Which is: L'\0' (0, 0x0)\n"
-                          "  L'x'\n"
-                          "    Which is: L'x' (120, 0x78)");
-
-  static wchar_t wchar;
-  wchar = L'b';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(L'a', wchar),
-                          "wchar");
-  wchar = 0x8119;
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<wchar_t>(0x8120), wchar),
-                       "  wchar\n    Which is: L'");
-}
-
-// Tests using ::std::string values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, StdString) {
-  // Compares a const char* to an std::string that has identical
-  // content.
-  ASSERT_EQ("Test", ::std::string("Test"));
-
-  // Compares two identical std::strings.
-  static const ::std::string str1("A * in the middle");
-  static const ::std::string str2(str1);
-  EXPECT_EQ(str1, str2);
-
-  // Compares a const char* to an std::string that has different
-  // content
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ("Test", ::std::string("test")),
-                          "\"test\"");
-
-  // Compares an std::string to a char* that has different content.
-  char* const p1 = const_cast<char*>("foo");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(::std::string("bar"), p1),
-                          "p1");
-
-  // Compares two std::strings that have different contents, one of
-  // which having a NUL character in the middle.  This should fail.
-  static ::std::string str3(str1);
-  str3.at(2) = '\0';
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(str1, str3),
-                       "  str3\n    Which is: \"A \\0 in the middle\"");
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Tests using ::std::wstring values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, StdWideString) {
-  // Compares two identical std::wstrings.
-  const ::std::wstring wstr1(L"A * in the middle");
-  const ::std::wstring wstr2(wstr1);
-  ASSERT_EQ(wstr1, wstr2);
-
-  // Compares an std::wstring to a const wchar_t* that has identical
-  // content.
-  const wchar_t kTestX8119[] = { 'T', 'e', 's', 't', 0x8119, '\0' };
-  EXPECT_EQ(::std::wstring(kTestX8119), kTestX8119);
-
-  // Compares an std::wstring to a const wchar_t* that has different
-  // content.
-  const wchar_t kTestX8120[] = { 'T', 'e', 's', 't', 0x8120, '\0' };
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_EQ(::std::wstring(kTestX8119), kTestX8120);
-  }, "kTestX8120");
-
-  // Compares two std::wstrings that have different contents, one of
-  // which having a NUL character in the middle.
-  ::std::wstring wstr3(wstr1);
-  wstr3.at(2) = L'\0';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(wstr1, wstr3),
-                          "wstr3");
-
-  // Compares a wchar_t* to an std::wstring that has different
-  // content.
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EQ(const_cast<wchar_t*>(L"foo"), ::std::wstring(L"bar"));
-  }, "");
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests using char pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, CharPointer) {
-  char* const p0 = nullptr;
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  void* pv2 = (void*)0xABC0;  // NOLINT
-  char* const p1 = reinterpret_cast<char*>(pv1);
-  char* const p2 = reinterpret_cast<char*>(pv2);
-  ASSERT_EQ(p1, p1);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p0, p2),
-                          "  p2\n    Which is:");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p1, p2),
-                          "  p2\n    Which is:");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(reinterpret_cast<char*>(0x1234),
-                                 reinterpret_cast<char*>(0xABC0)),
-                       "ABC0");
-}
-
-// Tests using wchar_t pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, WideCharPointer) {
-  wchar_t* const p0 = nullptr;
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  void* pv2 = (void*)0xABC0;  // NOLINT
-  wchar_t* const p1 = reinterpret_cast<wchar_t*>(pv1);
-  wchar_t* const p2 = reinterpret_cast<wchar_t*>(pv2);
-  EXPECT_EQ(p0, p0);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p0, p2),
-                          "  p2\n    Which is:");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p1, p2),
-                          "  p2\n    Which is:");
-  void* pv3 = (void*)0x1234;  // NOLINT
-  void* pv4 = (void*)0xABC0;  // NOLINT
-  const wchar_t* p3 = reinterpret_cast<const wchar_t*>(pv3);
-  const wchar_t* p4 = reinterpret_cast<const wchar_t*>(pv4);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p3, p4),
-                          "p4");
-}
-
-// Tests using other types of pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, OtherPointer) {
-  ASSERT_EQ(static_cast<const int*>(nullptr), static_cast<const int*>(nullptr));
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<const int*>(nullptr),
-                                 reinterpret_cast<const int*>(0x1234)),
-                       "0x1234");
-}
-
-// A class that supports binary comparison operators but not streaming.
-class UnprintableChar {
- public:
-  explicit UnprintableChar(char ch) : char_(ch) {}
-
-  bool operator==(const UnprintableChar& rhs) const {
-    return char_ == rhs.char_;
-  }
-  bool operator!=(const UnprintableChar& rhs) const {
-    return char_ != rhs.char_;
-  }
-  bool operator<(const UnprintableChar& rhs) const {
-    return char_ < rhs.char_;
-  }
-  bool operator<=(const UnprintableChar& rhs) const {
-    return char_ <= rhs.char_;
-  }
-  bool operator>(const UnprintableChar& rhs) const {
-    return char_ > rhs.char_;
-  }
-  bool operator>=(const UnprintableChar& rhs) const {
-    return char_ >= rhs.char_;
-  }
-
- private:
-  char char_;
-};
-
-// Tests that ASSERT_EQ() and friends don't require the arguments to
-// be printable.
-TEST(ComparisonAssertionTest, AcceptsUnprintableArgs) {
-  const UnprintableChar x('x'), y('y');
-  ASSERT_EQ(x, x);
-  EXPECT_NE(x, y);
-  ASSERT_LT(x, y);
-  EXPECT_LE(x, y);
-  ASSERT_GT(y, x);
-  EXPECT_GE(x, x);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y), "1-byte object <78>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y), "1-byte object <79>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(y, y), "1-byte object <79>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(x, y), "1-byte object <78>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(x, y), "1-byte object <79>");
-
-  // Code tested by EXPECT_FATAL_FAILURE cannot reference local
-  // variables, so we have to write UnprintableChar('x') instead of x.
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_NE(UnprintableChar('x'), UnprintableChar('x')),
-                       "1-byte object <78>");
-  EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
-                       "1-byte object <78>");
-#endif
-  EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
-                       "1-byte object <79>");
-  EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
-                       "1-byte object <78>");
-  EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
-                       "1-byte object <79>");
-}
-
-// Tests the FRIEND_TEST macro.
-
-// This class has a private member we want to test.  We will test it
-// both in a TEST and in a TEST_F.
-class Foo {
- public:
-  Foo() {}
-
- private:
-  int Bar() const { return 1; }
-
-  // Declares the friend tests that can access the private member
-  // Bar().
-  FRIEND_TEST(FRIEND_TEST_Test, TEST);
-  FRIEND_TEST(FRIEND_TEST_Test2, TEST_F);
-};
-
-// Tests that the FRIEND_TEST declaration allows a TEST to access a
-// class's private members.  This should compile.
-TEST(FRIEND_TEST_Test, TEST) {
-  ASSERT_EQ(1, Foo().Bar());
-}
-
-// The fixture needed to test using FRIEND_TEST with TEST_F.
-class FRIEND_TEST_Test2 : public Test {
- protected:
-  Foo foo;
-};
-
-// Tests that the FRIEND_TEST declaration allows a TEST_F to access a
-// class's private members.  This should compile.
-TEST_F(FRIEND_TEST_Test2, TEST_F) {
-  ASSERT_EQ(1, foo.Bar());
-}
-
-// Tests the life cycle of Test objects.
-
-// The test fixture for testing the life cycle of Test objects.
-//
-// This class counts the number of live test objects that uses this
-// fixture.
-class TestLifeCycleTest : public Test {
- protected:
-  // Constructor.  Increments the number of test objects that uses
-  // this fixture.
-  TestLifeCycleTest() { count_++; }
-
-  // Destructor.  Decrements the number of test objects that uses this
-  // fixture.
-  ~TestLifeCycleTest() override { count_--; }
-
-  // Returns the number of live test objects that uses this fixture.
-  int count() const { return count_; }
-
- private:
-  static int count_;
-};
-
-int TestLifeCycleTest::count_ = 0;
-
-// Tests the life cycle of test objects.
-TEST_F(TestLifeCycleTest, Test1) {
-  // There should be only one test object in this test case that's
-  // currently alive.
-  ASSERT_EQ(1, count());
-}
-
-// Tests the life cycle of test objects.
-TEST_F(TestLifeCycleTest, Test2) {
-  // After Test1 is done and Test2 is started, there should still be
-  // only one live test object, as the object for Test1 should've been
-  // deleted.
-  ASSERT_EQ(1, count());
-}
-
-}  // namespace
-
-// Tests that the copy constructor works when it is NOT optimized away by
-// the compiler.
-TEST(AssertionResultTest, CopyConstructorWorksWhenNotOptimied) {
-  // Checks that the copy constructor doesn't try to dereference NULL pointers
-  // in the source object.
-  AssertionResult r1 = AssertionSuccess();
-  AssertionResult r2 = r1;
-  // The following line is added to prevent the compiler from optimizing
-  // away the constructor call.
-  r1 << "abc";
-
-  AssertionResult r3 = r1;
-  EXPECT_EQ(static_cast<bool>(r3), static_cast<bool>(r1));
-  EXPECT_STREQ("abc", r1.message());
-}
-
-// Tests that AssertionSuccess and AssertionFailure construct
-// AssertionResult objects as expected.
-TEST(AssertionResultTest, ConstructionWorks) {
-  AssertionResult r1 = AssertionSuccess();
-  EXPECT_TRUE(r1);
-  EXPECT_STREQ("", r1.message());
-
-  AssertionResult r2 = AssertionSuccess() << "abc";
-  EXPECT_TRUE(r2);
-  EXPECT_STREQ("abc", r2.message());
-
-  AssertionResult r3 = AssertionFailure();
-  EXPECT_FALSE(r3);
-  EXPECT_STREQ("", r3.message());
-
-  AssertionResult r4 = AssertionFailure() << "def";
-  EXPECT_FALSE(r4);
-  EXPECT_STREQ("def", r4.message());
-
-  AssertionResult r5 = AssertionFailure(Message() << "ghi");
-  EXPECT_FALSE(r5);
-  EXPECT_STREQ("ghi", r5.message());
-}
-
-// Tests that the negation flips the predicate result but keeps the message.
-TEST(AssertionResultTest, NegationWorks) {
-  AssertionResult r1 = AssertionSuccess() << "abc";
-  EXPECT_FALSE(!r1);
-  EXPECT_STREQ("abc", (!r1).message());
-
-  AssertionResult r2 = AssertionFailure() << "def";
-  EXPECT_TRUE(!r2);
-  EXPECT_STREQ("def", (!r2).message());
-}
-
-TEST(AssertionResultTest, StreamingWorks) {
-  AssertionResult r = AssertionSuccess();
-  r << "abc" << 'd' << 0 << true;
-  EXPECT_STREQ("abcd0true", r.message());
-}
-
-TEST(AssertionResultTest, CanStreamOstreamManipulators) {
-  AssertionResult r = AssertionSuccess();
-  r << "Data" << std::endl << std::flush << std::ends << "Will be visible";
-  EXPECT_STREQ("Data\n\\0Will be visible", r.message());
-}
-
-// The next test uses explicit conversion operators
-
-TEST(AssertionResultTest, ConstructibleFromContextuallyConvertibleToBool) {
-  struct ExplicitlyConvertibleToBool {
-    explicit operator bool() const { return value; }
-    bool value;
-  };
-  ExplicitlyConvertibleToBool v1 = {false};
-  ExplicitlyConvertibleToBool v2 = {true};
-  EXPECT_FALSE(v1);
-  EXPECT_TRUE(v2);
-}
-
-struct ConvertibleToAssertionResult {
-  operator AssertionResult() const { return AssertionResult(true); }
-};
-
-TEST(AssertionResultTest, ConstructibleFromImplicitlyConvertible) {
-  ConvertibleToAssertionResult obj;
-  EXPECT_TRUE(obj);
-}
-
-// Tests streaming a user type whose definition and operator << are
-// both in the global namespace.
-class Base {
- public:
-  explicit Base(int an_x) : x_(an_x) {}
-  int x() const { return x_; }
- private:
-  int x_;
-};
-std::ostream& operator<<(std::ostream& os,
-                         const Base& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const Base* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-
-TEST(MessageTest, CanStreamUserTypeInGlobalNameSpace) {
-  Message msg;
-  Base a(1);
-
-  msg << a << &a;  // Uses ::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition and operator<< are
-// both in an unnamed namespace.
-namespace {
-class MyTypeInUnnamedNameSpace : public Base {
- public:
-  explicit MyTypeInUnnamedNameSpace(int an_x): Base(an_x) {}
-};
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInUnnamedNameSpace& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInUnnamedNameSpace* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-}  // namespace
-
-TEST(MessageTest, CanStreamUserTypeInUnnamedNameSpace) {
-  Message msg;
-  MyTypeInUnnamedNameSpace a(1);
-
-  msg << a << &a;  // Uses <unnamed_namespace>::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition and operator<< are
-// both in a user namespace.
-namespace namespace1 {
-class MyTypeInNameSpace1 : public Base {
- public:
-  explicit MyTypeInNameSpace1(int an_x): Base(an_x) {}
-};
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInNameSpace1& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInNameSpace1* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-}  // namespace namespace1
-
-TEST(MessageTest, CanStreamUserTypeInUserNameSpace) {
-  Message msg;
-  namespace1::MyTypeInNameSpace1 a(1);
-
-  msg << a << &a;  // Uses namespace1::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition is in a user namespace
-// but whose operator<< is in the global namespace.
-namespace namespace2 {
-class MyTypeInNameSpace2 : public ::Base {
- public:
-  explicit MyTypeInNameSpace2(int an_x): Base(an_x) {}
-};
-}  // namespace namespace2
-std::ostream& operator<<(std::ostream& os,
-                         const namespace2::MyTypeInNameSpace2& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const namespace2::MyTypeInNameSpace2* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-
-TEST(MessageTest, CanStreamUserTypeInUserNameSpaceWithStreamOperatorInGlobal) {
-  Message msg;
-  namespace2::MyTypeInNameSpace2 a(1);
-
-  msg << a << &a;  // Uses ::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming NULL pointers to testing::Message.
-TEST(MessageTest, NullPointers) {
-  Message msg;
-  char* const p1 = nullptr;
-  unsigned char* const p2 = nullptr;
-  int* p3 = nullptr;
-  double* p4 = nullptr;
-  bool* p5 = nullptr;
-  Message* p6 = nullptr;
-
-  msg << p1 << p2 << p3 << p4 << p5 << p6;
-  ASSERT_STREQ("(null)(null)(null)(null)(null)(null)",
-               msg.GetString().c_str());
-}
-
-// Tests streaming wide strings to testing::Message.
-TEST(MessageTest, WideStrings) {
-  // Streams a NULL of type const wchar_t*.
-  const wchar_t* const_wstr = nullptr;
-  EXPECT_STREQ("(null)",
-               (Message() << const_wstr).GetString().c_str());
-
-  // Streams a NULL of type wchar_t*.
-  wchar_t* wstr = nullptr;
-  EXPECT_STREQ("(null)",
-               (Message() << wstr).GetString().c_str());
-
-  // Streams a non-NULL of type const wchar_t*.
-  const_wstr = L"abc\x8119";
-  EXPECT_STREQ("abc\xe8\x84\x99",
-               (Message() << const_wstr).GetString().c_str());
-
-  // Streams a non-NULL of type wchar_t*.
-  wstr = const_cast<wchar_t*>(const_wstr);
-  EXPECT_STREQ("abc\xe8\x84\x99",
-               (Message() << wstr).GetString().c_str());
-}
-
-
-// This line tests that we can define tests in the testing namespace.
-namespace testing {
-
-// Tests the TestInfo class.
-
-class TestInfoTest : public Test {
- protected:
-  static const TestInfo* GetTestInfo(const char* test_name) {
-    const TestSuite* const test_suite =
-        GetUnitTestImpl()->GetTestSuite("TestInfoTest", "", nullptr, nullptr);
-
-    for (int i = 0; i < test_suite->total_test_count(); ++i) {
-      const TestInfo* const test_info = test_suite->GetTestInfo(i);
-      if (strcmp(test_name, test_info->name()) == 0)
-        return test_info;
-    }
-    return nullptr;
-  }
-
-  static const TestResult* GetTestResult(
-      const TestInfo* test_info) {
-    return test_info->result();
-  }
-};
-
-// Tests TestInfo::test_case_name() and TestInfo::name().
-TEST_F(TestInfoTest, Names) {
-  const TestInfo* const test_info = GetTestInfo("Names");
-
-  ASSERT_STREQ("TestInfoTest", test_info->test_suite_name());
-  ASSERT_STREQ("Names", test_info->name());
-}
-
-// Tests TestInfo::result().
-TEST_F(TestInfoTest, result) {
-  const TestInfo* const test_info = GetTestInfo("result");
-
-  // Initially, there is no TestPartResult for this test.
-  ASSERT_EQ(0, GetTestResult(test_info)->total_part_count());
-
-  // After the previous assertion, there is still none.
-  ASSERT_EQ(0, GetTestResult(test_info)->total_part_count());
-}
-
-#define VERIFY_CODE_LOCATION \
-  const int expected_line = __LINE__ - 1; \
-  const TestInfo* const test_info = GetUnitTestImpl()->current_test_info(); \
-  ASSERT_TRUE(test_info); \
-  EXPECT_STREQ(__FILE__, test_info->file()); \
-  EXPECT_EQ(expected_line, test_info->line())
-
-TEST(CodeLocationForTEST, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-class CodeLocationForTESTF : public Test {
-};
-
-TEST_F(CodeLocationForTESTF, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-class CodeLocationForTESTP : public TestWithParam<int> {
-};
-
-TEST_P(CodeLocationForTESTP, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-INSTANTIATE_TEST_SUITE_P(, CodeLocationForTESTP, Values(0));
-
-template <typename T>
-class CodeLocationForTYPEDTEST : public Test {
-};
-
-TYPED_TEST_SUITE(CodeLocationForTYPEDTEST, int);
-
-TYPED_TEST(CodeLocationForTYPEDTEST, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-template <typename T>
-class CodeLocationForTYPEDTESTP : public Test {
-};
-
-TYPED_TEST_SUITE_P(CodeLocationForTYPEDTESTP);
-
-TYPED_TEST_P(CodeLocationForTYPEDTESTP, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-REGISTER_TYPED_TEST_SUITE_P(CodeLocationForTYPEDTESTP, Verify);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, CodeLocationForTYPEDTESTP, int);
-
-#undef VERIFY_CODE_LOCATION
-
-// Tests setting up and tearing down a test case.
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-class SetUpTestCaseTest : public Test {
- protected:
-  // This will be called once before the first test in this test case
-  // is run.
-  static void SetUpTestCase() {
-    printf("Setting up the test case . . .\n");
-
-    // Initializes some shared resource.  In this simple example, we
-    // just create a C string.  More complex stuff can be done if
-    // desired.
-    shared_resource_ = "123";
-
-    // Increments the number of test cases that have been set up.
-    counter_++;
-
-    // SetUpTestCase() should be called only once.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // This will be called once after the last test in this test case is
-  // run.
-  static void TearDownTestCase() {
-    printf("Tearing down the test case . . .\n");
-
-    // Decrements the number of test cases that have been set up.
-    counter_--;
-
-    // TearDownTestCase() should be called only once.
-    EXPECT_EQ(0, counter_);
-
-    // Cleans up the shared resource.
-    shared_resource_ = nullptr;
-  }
-
-  // This will be called before each test in this test case.
-  void SetUp() override {
-    // SetUpTestCase() should be called only once, so counter_ should
-    // always be 1.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // Number of test cases that have been set up.
-  static int counter_;
-
-  // Some resource to be shared by all tests in this test case.
-  static const char* shared_resource_;
-};
-
-int SetUpTestCaseTest::counter_ = 0;
-const char* SetUpTestCaseTest::shared_resource_ = nullptr;
-
-// A test that uses the shared resource.
-TEST_F(SetUpTestCaseTest, Test1) { EXPECT_STRNE(nullptr, shared_resource_); }
-
-// Another test that uses the shared resource.
-TEST_F(SetUpTestCaseTest, Test2) {
-  EXPECT_STREQ("123", shared_resource_);
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Tests SetupTestSuite/TearDown TestSuite
-class SetUpTestSuiteTest : public Test {
- protected:
-  // This will be called once before the first test in this test case
-  // is run.
-  static void SetUpTestSuite() {
-    printf("Setting up the test suite . . .\n");
-
-    // Initializes some shared resource.  In this simple example, we
-    // just create a C string.  More complex stuff can be done if
-    // desired.
-    shared_resource_ = "123";
-
-    // Increments the number of test cases that have been set up.
-    counter_++;
-
-    // SetUpTestSuite() should be called only once.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // This will be called once after the last test in this test case is
-  // run.
-  static void TearDownTestSuite() {
-    printf("Tearing down the test suite . . .\n");
-
-    // Decrements the number of test suites that have been set up.
-    counter_--;
-
-    // TearDownTestSuite() should be called only once.
-    EXPECT_EQ(0, counter_);
-
-    // Cleans up the shared resource.
-    shared_resource_ = nullptr;
-  }
-
-  // This will be called before each test in this test case.
-  void SetUp() override {
-    // SetUpTestSuite() should be called only once, so counter_ should
-    // always be 1.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // Number of test suites that have been set up.
-  static int counter_;
-
-  // Some resource to be shared by all tests in this test case.
-  static const char* shared_resource_;
-};
-
-int SetUpTestSuiteTest::counter_ = 0;
-const char* SetUpTestSuiteTest::shared_resource_ = nullptr;
-
-// A test that uses the shared resource.
-TEST_F(SetUpTestSuiteTest, TestSetupTestSuite1) {
-  EXPECT_STRNE(nullptr, shared_resource_);
-}
-
-// Another test that uses the shared resource.
-TEST_F(SetUpTestSuiteTest, TestSetupTestSuite2) {
-  EXPECT_STREQ("123", shared_resource_);
-}
-
-// The ParseFlagsTest test case tests ParseGoogleTestFlagsOnly.
-
-// The Flags struct stores a copy of all Google Test flags.
-struct Flags {
-  // Constructs a Flags struct where each flag has its default value.
-  Flags()
-      : also_run_disabled_tests(false),
-        break_on_failure(false),
-        catch_exceptions(false),
-        death_test_use_fork(false),
-        fail_fast(false),
-        filter(""),
-        list_tests(false),
-        output(""),
-        brief(false),
-        print_time(true),
-        random_seed(0),
-        repeat(1),
-        shuffle(false),
-        stack_trace_depth(kMaxStackTraceDepth),
-        stream_result_to(""),
-        throw_on_failure(false) {}
-
-  // Factory methods.
-
-  // Creates a Flags struct where the gtest_also_run_disabled_tests flag has
-  // the given value.
-  static Flags AlsoRunDisabledTests(bool also_run_disabled_tests) {
-    Flags flags;
-    flags.also_run_disabled_tests = also_run_disabled_tests;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_break_on_failure flag has
-  // the given value.
-  static Flags BreakOnFailure(bool break_on_failure) {
-    Flags flags;
-    flags.break_on_failure = break_on_failure;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_catch_exceptions flag has
-  // the given value.
-  static Flags CatchExceptions(bool catch_exceptions) {
-    Flags flags;
-    flags.catch_exceptions = catch_exceptions;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_death_test_use_fork flag has
-  // the given value.
-  static Flags DeathTestUseFork(bool death_test_use_fork) {
-    Flags flags;
-    flags.death_test_use_fork = death_test_use_fork;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_fail_fast flag has
-  // the given value.
-  static Flags FailFast(bool fail_fast) {
-    Flags flags;
-    flags.fail_fast = fail_fast;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_filter flag has the given
-  // value.
-  static Flags Filter(const char* filter) {
-    Flags flags;
-    flags.filter = filter;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_list_tests flag has the
-  // given value.
-  static Flags ListTests(bool list_tests) {
-    Flags flags;
-    flags.list_tests = list_tests;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_output flag has the given
-  // value.
-  static Flags Output(const char* output) {
-    Flags flags;
-    flags.output = output;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_brief flag has the given
-  // value.
-  static Flags Brief(bool brief) {
-    Flags flags;
-    flags.brief = brief;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_print_time flag has the given
-  // value.
-  static Flags PrintTime(bool print_time) {
-    Flags flags;
-    flags.print_time = print_time;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_random_seed flag has the given
-  // value.
-  static Flags RandomSeed(int32_t random_seed) {
-    Flags flags;
-    flags.random_seed = random_seed;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_repeat flag has the given
-  // value.
-  static Flags Repeat(int32_t repeat) {
-    Flags flags;
-    flags.repeat = repeat;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_shuffle flag has the given
-  // value.
-  static Flags Shuffle(bool shuffle) {
-    Flags flags;
-    flags.shuffle = shuffle;
-    return flags;
-  }
-
-  // Creates a Flags struct where the GTEST_FLAG(stack_trace_depth) flag has
-  // the given value.
-  static Flags StackTraceDepth(int32_t stack_trace_depth) {
-    Flags flags;
-    flags.stack_trace_depth = stack_trace_depth;
-    return flags;
-  }
-
-  // Creates a Flags struct where the GTEST_FLAG(stream_result_to) flag has
-  // the given value.
-  static Flags StreamResultTo(const char* stream_result_to) {
-    Flags flags;
-    flags.stream_result_to = stream_result_to;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_throw_on_failure flag has
-  // the given value.
-  static Flags ThrowOnFailure(bool throw_on_failure) {
-    Flags flags;
-    flags.throw_on_failure = throw_on_failure;
-    return flags;
-  }
-
-  // These fields store the flag values.
-  bool also_run_disabled_tests;
-  bool break_on_failure;
-  bool catch_exceptions;
-  bool death_test_use_fork;
-  bool fail_fast;
-  const char* filter;
-  bool list_tests;
-  const char* output;
-  bool brief;
-  bool print_time;
-  int32_t random_seed;
-  int32_t repeat;
-  bool shuffle;
-  int32_t stack_trace_depth;
-  const char* stream_result_to;
-  bool throw_on_failure;
-};
-
-// Fixture for testing ParseGoogleTestFlagsOnly().
-class ParseFlagsTest : public Test {
- protected:
-  // Clears the flags before each test.
-  void SetUp() override {
-    GTEST_FLAG(also_run_disabled_tests) = false;
-    GTEST_FLAG(break_on_failure) = false;
-    GTEST_FLAG(catch_exceptions) = false;
-    GTEST_FLAG(death_test_use_fork) = false;
-    GTEST_FLAG(fail_fast) = false;
-    GTEST_FLAG(filter) = "";
-    GTEST_FLAG(list_tests) = false;
-    GTEST_FLAG(output) = "";
-    GTEST_FLAG(brief) = false;
-    GTEST_FLAG(print_time) = true;
-    GTEST_FLAG(random_seed) = 0;
-    GTEST_FLAG(repeat) = 1;
-    GTEST_FLAG(shuffle) = false;
-    GTEST_FLAG(stack_trace_depth) = kMaxStackTraceDepth;
-    GTEST_FLAG(stream_result_to) = "";
-    GTEST_FLAG(throw_on_failure) = false;
-  }
-
-  // Asserts that two narrow or wide string arrays are equal.
-  template <typename CharType>
-  static void AssertStringArrayEq(int size1, CharType** array1, int size2,
-                                  CharType** array2) {
-    ASSERT_EQ(size1, size2) << " Array sizes different.";
-
-    for (int i = 0; i != size1; i++) {
-      ASSERT_STREQ(array1[i], array2[i]) << " where i == " << i;
-    }
-  }
-
-  // Verifies that the flag values match the expected values.
-  static void CheckFlags(const Flags& expected) {
-    EXPECT_EQ(expected.also_run_disabled_tests,
-              GTEST_FLAG(also_run_disabled_tests));
-    EXPECT_EQ(expected.break_on_failure, GTEST_FLAG(break_on_failure));
-    EXPECT_EQ(expected.catch_exceptions, GTEST_FLAG(catch_exceptions));
-    EXPECT_EQ(expected.death_test_use_fork, GTEST_FLAG(death_test_use_fork));
-    EXPECT_EQ(expected.fail_fast, GTEST_FLAG(fail_fast));
-    EXPECT_STREQ(expected.filter, GTEST_FLAG(filter).c_str());
-    EXPECT_EQ(expected.list_tests, GTEST_FLAG(list_tests));
-    EXPECT_STREQ(expected.output, GTEST_FLAG(output).c_str());
-    EXPECT_EQ(expected.brief, GTEST_FLAG(brief));
-    EXPECT_EQ(expected.print_time, GTEST_FLAG(print_time));
-    EXPECT_EQ(expected.random_seed, GTEST_FLAG(random_seed));
-    EXPECT_EQ(expected.repeat, GTEST_FLAG(repeat));
-    EXPECT_EQ(expected.shuffle, GTEST_FLAG(shuffle));
-    EXPECT_EQ(expected.stack_trace_depth, GTEST_FLAG(stack_trace_depth));
-    EXPECT_STREQ(expected.stream_result_to,
-                 GTEST_FLAG(stream_result_to).c_str());
-    EXPECT_EQ(expected.throw_on_failure, GTEST_FLAG(throw_on_failure));
-  }
-
-  // Parses a command line (specified by argc1 and argv1), then
-  // verifies that the flag values are expected and that the
-  // recognized flags are removed from the command line.
-  template <typename CharType>
-  static void TestParsingFlags(int argc1, const CharType** argv1,
-                               int argc2, const CharType** argv2,
-                               const Flags& expected, bool should_print_help) {
-    const bool saved_help_flag = ::testing::internal::g_help_flag;
-    ::testing::internal::g_help_flag = false;
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    CaptureStdout();
-# endif
-
-    // Parses the command line.
-    internal::ParseGoogleTestFlagsOnly(&argc1, const_cast<CharType**>(argv1));
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    const std::string captured_stdout = GetCapturedStdout();
-# endif
-
-    // Verifies the flag values.
-    CheckFlags(expected);
-
-    // Verifies that the recognized flags are removed from the command
-    // line.
-    AssertStringArrayEq(argc1 + 1, argv1, argc2 + 1, argv2);
-
-    // ParseGoogleTestFlagsOnly should neither set g_help_flag nor print the
-    // help message for the flags it recognizes.
-    EXPECT_EQ(should_print_help, ::testing::internal::g_help_flag);
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    const char* const expected_help_fragment =
-        "This program contains tests written using";
-    if (should_print_help) {
-      EXPECT_PRED_FORMAT2(IsSubstring, expected_help_fragment, captured_stdout);
-    } else {
-      EXPECT_PRED_FORMAT2(IsNotSubstring,
-                          expected_help_fragment, captured_stdout);
-    }
-# endif  // GTEST_HAS_STREAM_REDIRECTION
-
-    ::testing::internal::g_help_flag = saved_help_flag;
-  }
-
-  // This macro wraps TestParsingFlags s.t. the user doesn't need
-  // to specify the array sizes.
-
-# define GTEST_TEST_PARSING_FLAGS_(argv1, argv2, expected, should_print_help) \
-  TestParsingFlags(sizeof(argv1)/sizeof(*argv1) - 1, argv1, \
-                   sizeof(argv2)/sizeof(*argv2) - 1, argv2, \
-                   expected, should_print_help)
-};
-
-// Tests parsing an empty command line.
-TEST_F(ParseFlagsTest, Empty) {
-  const char* argv[] = {nullptr};
-
-  const char* argv2[] = {nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests parsing a command line that has no flag.
-TEST_F(ParseFlagsTest, NoFlag) {
-  const char* argv[] = {"foo.exe", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests parsing --gtest_fail_fast.
-TEST_F(ParseFlagsTest, FailFast) {
-  const char* argv[] = {"foo.exe", "--gtest_fail_fast", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::FailFast(true), false);
-}
-
-// Tests parsing a bad --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterBad) {
-  const char* argv[] = {"foo.exe", "--gtest_filter", nullptr};
-
-  const char* argv2[] = {"foo.exe", "--gtest_filter", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter(""), true);
-}
-
-// Tests parsing an empty --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter(""), false);
-}
-
-// Tests parsing a non-empty --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterNonEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=abc", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("abc"), false);
-}
-
-// Tests parsing --gtest_break_on_failure.
-TEST_F(ParseFlagsTest, BreakOnFailureWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(true), false);
-}
-
-// Tests parsing --gtest_break_on_failure=0.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing --gtest_break_on_failure=f.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing --gtest_break_on_failure=F.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing a --gtest_break_on_failure flag that has a "true"
-// definition.
-TEST_F(ParseFlagsTest, BreakOnFailureTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(true), false);
-}
-
-// Tests parsing --gtest_catch_exceptions.
-TEST_F(ParseFlagsTest, CatchExceptions) {
-  const char* argv[] = {"foo.exe", "--gtest_catch_exceptions", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::CatchExceptions(true), false);
-}
-
-// Tests parsing --gtest_death_test_use_fork.
-TEST_F(ParseFlagsTest, DeathTestUseFork) {
-  const char* argv[] = {"foo.exe", "--gtest_death_test_use_fork", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::DeathTestUseFork(true), false);
-}
-
-// Tests having the same flag twice with different values.  The
-// expected behavior is that the one coming last takes precedence.
-TEST_F(ParseFlagsTest, DuplicatedFlags) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=a", "--gtest_filter=b",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("b"), false);
-}
-
-// Tests having an unrecognized flag on the command line.
-TEST_F(ParseFlagsTest, UnrecognizedFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure",
-                        "bar",  // Unrecognized by Google Test.
-                        "--gtest_filter=b", nullptr};
-
-  const char* argv2[] = {"foo.exe", "bar", nullptr};
-
-  Flags flags;
-  flags.break_on_failure = true;
-  flags.filter = "b";
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, flags, false);
-}
-
-// Tests having a --gtest_list_tests flag
-TEST_F(ParseFlagsTest, ListTestsFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(true), false);
-}
-
-// Tests having a --gtest_list_tests flag with a "true" value
-TEST_F(ParseFlagsTest, ListTestsTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(true), false);
-}
-
-// Tests having a --gtest_list_tests flag with a "false" value
-TEST_F(ParseFlagsTest, ListTestsFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_list_tests=f.
-TEST_F(ParseFlagsTest, ListTestsFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_list_tests=F.
-TEST_F(ParseFlagsTest, ListTestsFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_output (invalid).
-TEST_F(ParseFlagsTest, OutputEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_output", nullptr};
-
-  const char* argv2[] = {"foo.exe", "--gtest_output", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), true);
-}
-
-// Tests parsing --gtest_output=xml
-TEST_F(ParseFlagsTest, OutputXml) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Output("xml"), false);
-}
-
-// Tests parsing --gtest_output=xml:file
-TEST_F(ParseFlagsTest, OutputXmlFile) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml:file", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Output("xml:file"), false);
-}
-
-// Tests parsing --gtest_output=xml:directory/path/
-TEST_F(ParseFlagsTest, OutputXmlDirectory) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml:directory/path/",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2,
-                            Flags::Output("xml:directory/path/"), false);
-}
-
-// Tests having a --gtest_brief flag
-TEST_F(ParseFlagsTest, BriefFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_brief", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Brief(true), false);
-}
-
-// Tests having a --gtest_brief flag with a "true" value
-TEST_F(ParseFlagsTest, BriefFlagTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_brief=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Brief(true), false);
-}
-
-// Tests having a --gtest_brief flag with a "false" value
-TEST_F(ParseFlagsTest, BriefFlagFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_brief=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Brief(false), false);
-}
-
-// Tests having a --gtest_print_time flag
-TEST_F(ParseFlagsTest, PrintTimeFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(true), false);
-}
-
-// Tests having a --gtest_print_time flag with a "true" value
-TEST_F(ParseFlagsTest, PrintTimeTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(true), false);
-}
-
-// Tests having a --gtest_print_time flag with a "false" value
-TEST_F(ParseFlagsTest, PrintTimeFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_print_time=f.
-TEST_F(ParseFlagsTest, PrintTimeFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_print_time=F.
-TEST_F(ParseFlagsTest, PrintTimeFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_random_seed=number
-TEST_F(ParseFlagsTest, RandomSeed) {
-  const char* argv[] = {"foo.exe", "--gtest_random_seed=1000", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::RandomSeed(1000), false);
-}
-
-// Tests parsing --gtest_repeat=number
-TEST_F(ParseFlagsTest, Repeat) {
-  const char* argv[] = {"foo.exe", "--gtest_repeat=1000", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Repeat(1000), false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(true),
-                            false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag with a "true" value
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests=1",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(true),
-                            false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag with a "false" value
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests=0",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(false),
-                            false);
-}
-
-// Tests parsing --gtest_shuffle.
-TEST_F(ParseFlagsTest, ShuffleWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(true), false);
-}
-
-// Tests parsing --gtest_shuffle=0.
-TEST_F(ParseFlagsTest, ShuffleFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(false), false);
-}
-
-// Tests parsing a --gtest_shuffle flag that has a "true" definition.
-TEST_F(ParseFlagsTest, ShuffleTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(true), false);
-}
-
-// Tests parsing --gtest_stack_trace_depth=number.
-TEST_F(ParseFlagsTest, StackTraceDepth) {
-  const char* argv[] = {"foo.exe", "--gtest_stack_trace_depth=5", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::StackTraceDepth(5), false);
-}
-
-TEST_F(ParseFlagsTest, StreamResultTo) {
-  const char* argv[] = {"foo.exe", "--gtest_stream_result_to=localhost:1234",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(
-      argv, argv2, Flags::StreamResultTo("localhost:1234"), false);
-}
-
-// Tests parsing --gtest_throw_on_failure.
-TEST_F(ParseFlagsTest, ThrowOnFailureWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(true), false);
-}
-
-// Tests parsing --gtest_throw_on_failure=0.
-TEST_F(ParseFlagsTest, ThrowOnFailureFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(false), false);
-}
-
-// Tests parsing a --gtest_throw_on_failure flag that has a "true"
-// definition.
-TEST_F(ParseFlagsTest, ThrowOnFailureTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(true), false);
-}
-
-# if GTEST_OS_WINDOWS
-// Tests parsing wide strings.
-TEST_F(ParseFlagsTest, WideStrings) {
-  const wchar_t* argv[] = {
-    L"foo.exe",
-    L"--gtest_filter=Foo*",
-    L"--gtest_list_tests=1",
-    L"--gtest_break_on_failure",
-    L"--non_gtest_flag",
-    NULL
-  };
-
-  const wchar_t* argv2[] = {
-    L"foo.exe",
-    L"--non_gtest_flag",
-    NULL
-  };
-
-  Flags expected_flags;
-  expected_flags.break_on_failure = true;
-  expected_flags.filter = "Foo*";
-  expected_flags.list_tests = true;
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, expected_flags, false);
-}
-# endif  // GTEST_OS_WINDOWS
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-class FlagfileTest : public ParseFlagsTest {
- public:
-  void SetUp() override {
-    ParseFlagsTest::SetUp();
-
-    testdata_path_.Set(internal::FilePath(
-        testing::TempDir() + internal::GetCurrentExecutableName().string() +
-        "_flagfile_test"));
-    testing::internal::posix::RmDir(testdata_path_.c_str());
-    EXPECT_TRUE(testdata_path_.CreateFolder());
-  }
-
-  void TearDown() override {
-    testing::internal::posix::RmDir(testdata_path_.c_str());
-    ParseFlagsTest::TearDown();
-  }
-
-  internal::FilePath CreateFlagfile(const char* contents) {
-    internal::FilePath file_path(internal::FilePath::GenerateUniqueFileName(
-        testdata_path_, internal::FilePath("unique"), "txt"));
-    FILE* f = testing::internal::posix::FOpen(file_path.c_str(), "w");
-    fprintf(f, "%s", contents);
-    fclose(f);
-    return file_path;
-  }
-
- private:
-  internal::FilePath testdata_path_;
-};
-
-// Tests an empty flagfile.
-TEST_F(FlagfileTest, Empty) {
-  internal::FilePath flagfile_path(CreateFlagfile(""));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests passing a non-empty --gtest_filter flag via --gtest_flagfile.
-TEST_F(FlagfileTest, FilterNonEmpty) {
-  internal::FilePath flagfile_path(CreateFlagfile(
-      "--"  GTEST_FLAG_PREFIX_  "filter=abc"));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("abc"), false);
-}
-
-// Tests passing several flags via --gtest_flagfile.
-TEST_F(FlagfileTest, SeveralFlags) {
-  internal::FilePath flagfile_path(CreateFlagfile(
-      "--"  GTEST_FLAG_PREFIX_  "filter=abc\n"
-      "--"  GTEST_FLAG_PREFIX_  "break_on_failure\n"
-      "--"  GTEST_FLAG_PREFIX_  "list_tests"));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  Flags expected_flags;
-  expected_flags.break_on_failure = true;
-  expected_flags.filter = "abc";
-  expected_flags.list_tests = true;
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, expected_flags, false);
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Tests current_test_info() in UnitTest.
-class CurrentTestInfoTest : public Test {
- protected:
-  // Tests that current_test_info() returns NULL before the first test in
-  // the test case is run.
-  static void SetUpTestSuite() {
-    // There should be no tests running at this point.
-    const TestInfo* test_info =
-      UnitTest::GetInstance()->current_test_info();
-    EXPECT_TRUE(test_info == nullptr)
-        << "There should be no tests running at this point.";
-  }
-
-  // Tests that current_test_info() returns NULL after the last test in
-  // the test case has run.
-  static void TearDownTestSuite() {
-    const TestInfo* test_info =
-      UnitTest::GetInstance()->current_test_info();
-    EXPECT_TRUE(test_info == nullptr)
-        << "There should be no tests running at this point.";
-  }
-};
-
-// Tests that current_test_info() returns TestInfo for currently running
-// test by checking the expected test name against the actual one.
-TEST_F(CurrentTestInfoTest, WorksForFirstTestInATestSuite) {
-  const TestInfo* test_info =
-    UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(nullptr != test_info)
-      << "There is a test running so we should have a valid TestInfo.";
-  EXPECT_STREQ("CurrentTestInfoTest", test_info->test_suite_name())
-      << "Expected the name of the currently running test suite.";
-  EXPECT_STREQ("WorksForFirstTestInATestSuite", test_info->name())
-      << "Expected the name of the currently running test.";
-}
-
-// Tests that current_test_info() returns TestInfo for currently running
-// test by checking the expected test name against the actual one.  We
-// use this test to see that the TestInfo object actually changed from
-// the previous invocation.
-TEST_F(CurrentTestInfoTest, WorksForSecondTestInATestSuite) {
-  const TestInfo* test_info =
-    UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(nullptr != test_info)
-      << "There is a test running so we should have a valid TestInfo.";
-  EXPECT_STREQ("CurrentTestInfoTest", test_info->test_suite_name())
-      << "Expected the name of the currently running test suite.";
-  EXPECT_STREQ("WorksForSecondTestInATestSuite", test_info->name())
-      << "Expected the name of the currently running test.";
-}
-
-}  // namespace testing
-
-
-// These two lines test that we can define tests in a namespace that
-// has the name "testing" and is nested in another namespace.
-namespace my_namespace {
-namespace testing {
-
-// Makes sure that TEST knows to use ::testing::Test instead of
-// ::my_namespace::testing::Test.
-class Test {};
-
-// Makes sure that an assertion knows to use ::testing::Message instead of
-// ::my_namespace::testing::Message.
-class Message {};
-
-// Makes sure that an assertion knows to use
-// ::testing::AssertionResult instead of
-// ::my_namespace::testing::AssertionResult.
-class AssertionResult {};
-
-// Tests that an assertion that should succeed works as expected.
-TEST(NestedTestingNamespaceTest, Success) {
-  EXPECT_EQ(1, 1) << "This shouldn't fail.";
-}
-
-// Tests that an assertion that should fail works as expected.
-TEST(NestedTestingNamespaceTest, Failure) {
-  EXPECT_FATAL_FAILURE(FAIL() << "This failure is expected.",
-                       "This failure is expected.");
-}
-
-}  // namespace testing
-}  // namespace my_namespace
-
-// Tests that one can call superclass SetUp and TearDown methods--
-// that is, that they are not private.
-// No tests are based on this fixture; the test "passes" if it compiles
-// successfully.
-class ProtectedFixtureMethodsTest : public Test {
- protected:
-  void SetUp() override { Test::SetUp(); }
-  void TearDown() override { Test::TearDown(); }
-};
-
-// StreamingAssertionsTest tests the streaming versions of a representative
-// sample of assertions.
-TEST(StreamingAssertionsTest, Unconditional) {
-  SUCCEED() << "expected success";
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE() << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(FAIL() << "expected failure",
-                       "expected failure");
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-TEST(StreamingAssertionsTest, Truth) {
-  EXPECT_TRUE(true) << "unexpected failure";
-  ASSERT_TRUE(true) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, Truth2) {
-  EXPECT_FALSE(false) << "unexpected failure";
-  ASSERT_FALSE(false) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(true) << "expected failure",
-                       "expected failure");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-TEST(StreamingAssertionsTest, IntegerEquals) {
-  EXPECT_EQ(1, 1) << "unexpected failure";
-  ASSERT_EQ(1, 1) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(1, 2) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(1, 2) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, IntegerLessThan) {
-  EXPECT_LT(1, 2) << "unexpected failure";
-  ASSERT_LT(1, 2) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 1) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_LT(2, 1) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsEqual) {
-  EXPECT_STREQ("foo", "foo") << "unexpected failure";
-  ASSERT_STREQ("foo", "foo") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ("foo", "bar") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("foo", "bar") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsNotEqual) {
-  EXPECT_STRNE("foo", "bar") << "unexpected failure";
-  ASSERT_STRNE("foo", "bar") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE("foo", "foo") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRNE("foo", "foo") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsEqualIgnoringCase) {
-  EXPECT_STRCASEEQ("foo", "FOO") << "unexpected failure";
-  ASSERT_STRCASEEQ("foo", "FOO") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASEEQ("foo", "bar") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASEEQ("foo", "bar") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringNotEqualIgnoringCase) {
-  EXPECT_STRCASENE("foo", "bar") << "unexpected failure";
-  ASSERT_STRCASENE("foo", "bar") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASENE("foo", "FOO") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("bar", "BAR") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, FloatingPointEquals) {
-  EXPECT_FLOAT_EQ(1.0, 1.0) << "unexpected failure";
-  ASSERT_FLOAT_EQ(1.0, 1.0) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(0.0, 1.0) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(0.0, 1.0) << "expected failure",
-                       "expected failure");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-TEST(StreamingAssertionsTest, Throw) {
-  EXPECT_THROW(ThrowAnInteger(), int) << "unexpected failure";
-  ASSERT_THROW(ThrowAnInteger(), int) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_THROW(ThrowAnInteger(), bool) <<
-                       "expected failure", "expected failure");
-}
-
-TEST(StreamingAssertionsTest, NoThrow) {
-  EXPECT_NO_THROW(ThrowNothing()) << "unexpected failure";
-  ASSERT_NO_THROW(ThrowNothing()) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()) <<
-                       "expected failure", "expected failure");
-}
-
-TEST(StreamingAssertionsTest, AnyThrow) {
-  EXPECT_ANY_THROW(ThrowAnInteger()) << "unexpected failure";
-  ASSERT_ANY_THROW(ThrowAnInteger()) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(ThrowNothing()) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_ANY_THROW(ThrowNothing()) <<
-                       "expected failure", "expected failure");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that Google Test correctly decides whether to use colors in the output.
-
-TEST(ColoredOutputTest, UsesColorsWhenGTestColorFlagIsYes) {
-  GTEST_FLAG(color) = "yes";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenGTestColorFlagIsAliasOfYes) {
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-
-  GTEST_FLAG(color) = "True";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  GTEST_FLAG(color) = "t";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  GTEST_FLAG(color) = "1";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesNoColorWhenGTestColorFlagIsNo) {
-  GTEST_FLAG(color) = "no";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesNoColorWhenGTestColorFlagIsInvalid) {
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-
-  GTEST_FLAG(color) = "F";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  GTEST_FLAG(color) = "0";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  GTEST_FLAG(color) = "unknown";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenStdoutIsTty) {
-  GTEST_FLAG(color) = "auto";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-  EXPECT_TRUE(ShouldUseColor(true));    // Stdout is a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenTermSupportsColors) {
-  GTEST_FLAG(color) = "auto";
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  // On Windows, we ignore the TERM variable as it's usually not set.
-
-  SetEnv("TERM", "dumb");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-#else
-  // On non-Windows platforms, we rely on TERM to determine if the
-  // terminal supports colors.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "emacs");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "vt100");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-mono");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "screen");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "screen-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "tmux");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "tmux-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "rxvt-unicode");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "rxvt-unicode-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "linux");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "cygwin");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-#endif  // GTEST_OS_WINDOWS
-}
-
-// Verifies that StaticAssertTypeEq works in a namespace scope.
-
-static bool dummy1 GTEST_ATTRIBUTE_UNUSED_ = StaticAssertTypeEq<bool, bool>();
-static bool dummy2 GTEST_ATTRIBUTE_UNUSED_ =
-    StaticAssertTypeEq<const int, const int>();
-
-// Verifies that StaticAssertTypeEq works in a class.
-
-template <typename T>
-class StaticAssertTypeEqTestHelper {
- public:
-  StaticAssertTypeEqTestHelper() { StaticAssertTypeEq<bool, T>(); }
-};
-
-TEST(StaticAssertTypeEqTest, WorksInClass) {
-  StaticAssertTypeEqTestHelper<bool>();
-}
-
-// Verifies that StaticAssertTypeEq works inside a function.
-
-typedef int IntAlias;
-
-TEST(StaticAssertTypeEqTest, CompilesForEqualTypes) {
-  StaticAssertTypeEq<int, IntAlias>();
-  StaticAssertTypeEq<int*, IntAlias*>();
-}
-
-TEST(HasNonfatalFailureTest, ReturnsFalseWhenThereIsNoFailure) {
-  EXPECT_FALSE(HasNonfatalFailure());
-}
-
-static void FailFatally() { FAIL(); }
-
-TEST(HasNonfatalFailureTest, ReturnsFalseWhenThereIsOnlyFatalFailure) {
-  FailFatally();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_FALSE(has_nonfatal_failure);
-}
-
-TEST(HasNonfatalFailureTest, ReturnsTrueWhenThereIsNonfatalFailure) {
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-TEST(HasNonfatalFailureTest, ReturnsTrueWhenThereAreFatalAndNonfatalFailures) {
-  FailFatally();
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-// A wrapper for calling HasNonfatalFailure outside of a test body.
-static bool HasNonfatalFailureHelper() {
-  return testing::Test::HasNonfatalFailure();
-}
-
-TEST(HasNonfatalFailureTest, WorksOutsideOfTestBody) {
-  EXPECT_FALSE(HasNonfatalFailureHelper());
-}
-
-TEST(HasNonfatalFailureTest, WorksOutsideOfTestBody2) {
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailureHelper();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-TEST(HasFailureTest, ReturnsFalseWhenThereIsNoFailure) {
-  EXPECT_FALSE(HasFailure());
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereIsFatalFailure) {
-  FailFatally();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereIsNonfatalFailure) {
-  ADD_FAILURE();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereAreFatalAndNonfatalFailures) {
-  FailFatally();
-  ADD_FAILURE();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-// A wrapper for calling HasFailure outside of a test body.
-static bool HasFailureHelper() { return testing::Test::HasFailure(); }
-
-TEST(HasFailureTest, WorksOutsideOfTestBody) {
-  EXPECT_FALSE(HasFailureHelper());
-}
-
-TEST(HasFailureTest, WorksOutsideOfTestBody2) {
-  ADD_FAILURE();
-  const bool has_failure = HasFailureHelper();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-class TestListener : public EmptyTestEventListener {
- public:
-  TestListener() : on_start_counter_(nullptr), is_destroyed_(nullptr) {}
-  TestListener(int* on_start_counter, bool* is_destroyed)
-      : on_start_counter_(on_start_counter),
-        is_destroyed_(is_destroyed) {}
-
-  ~TestListener() override {
-    if (is_destroyed_)
-      *is_destroyed_ = true;
-  }
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    if (on_start_counter_ != nullptr) (*on_start_counter_)++;
-  }
-
- private:
-  int* on_start_counter_;
-  bool* is_destroyed_;
-};
-
-// Tests the constructor.
-TEST(TestEventListenersTest, ConstructionWorks) {
-  TestEventListeners listeners;
-
-  EXPECT_TRUE(TestEventListenersAccessor::GetRepeater(&listeners) != nullptr);
-  EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-  EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-}
-
-// Tests that the TestEventListeners destructor deletes all the listeners it
-// owns.
-TEST(TestEventListenersTest, DestructionWorks) {
-  bool default_result_printer_is_destroyed = false;
-  bool default_xml_printer_is_destroyed = false;
-  bool extra_listener_is_destroyed = false;
-  TestListener* default_result_printer =
-      new TestListener(nullptr, &default_result_printer_is_destroyed);
-  TestListener* default_xml_printer =
-      new TestListener(nullptr, &default_xml_printer_is_destroyed);
-  TestListener* extra_listener =
-      new TestListener(nullptr, &extra_listener_is_destroyed);
-
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultResultPrinter(&listeners,
-                                                        default_result_printer);
-    TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners,
-                                                       default_xml_printer);
-    listeners.Append(extra_listener);
-  }
-  EXPECT_TRUE(default_result_printer_is_destroyed);
-  EXPECT_TRUE(default_xml_printer_is_destroyed);
-  EXPECT_TRUE(extra_listener_is_destroyed);
-}
-
-// Tests that a listener Append'ed to a TestEventListeners list starts
-// receiving events.
-TEST(TestEventListenersTest, Append) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    listeners.Append(listener);
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(1, on_start_counter);
-  }
-  EXPECT_TRUE(is_destroyed);
-}
-
-// Tests that listeners receive events in the order they were appended to
-// the list, except for *End requests, which must be received in the reverse
-// order.
-class SequenceTestingListener : public EmptyTestEventListener {
- public:
-  SequenceTestingListener(std::vector<std::string>* vector, const char* id)
-      : vector_(vector), id_(id) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    vector_->push_back(GetEventDescription("OnTestProgramStart"));
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    vector_->push_back(GetEventDescription("OnTestProgramEnd"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {
-    vector_->push_back(GetEventDescription("OnTestIterationStart"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {
-    vector_->push_back(GetEventDescription("OnTestIterationEnd"));
-  }
-
- private:
-  std::string GetEventDescription(const char* method) {
-    Message message;
-    message << id_ << "." << method;
-    return message.GetString();
-  }
-
-  std::vector<std::string>* vector_;
-  const char* const id_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SequenceTestingListener);
-};
-
-TEST(EventListenerTest, AppendKeepsOrder) {
-  std::vector<std::string> vec;
-  TestEventListeners listeners;
-  listeners.Append(new SequenceTestingListener(&vec, "1st"));
-  listeners.Append(new SequenceTestingListener(&vec, "2nd"));
-  listeners.Append(new SequenceTestingListener(&vec, "3rd"));
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("1st.OnTestProgramStart", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestProgramStart", vec[1].c_str());
-  EXPECT_STREQ("3rd.OnTestProgramStart", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramEnd(
-      *UnitTest::GetInstance());
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("3rd.OnTestProgramEnd", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestProgramEnd", vec[1].c_str());
-  EXPECT_STREQ("1st.OnTestProgramEnd", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestIterationStart(
-      *UnitTest::GetInstance(), 0);
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("1st.OnTestIterationStart", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestIterationStart", vec[1].c_str());
-  EXPECT_STREQ("3rd.OnTestIterationStart", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestIterationEnd(
-      *UnitTest::GetInstance(), 0);
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("3rd.OnTestIterationEnd", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestIterationEnd", vec[1].c_str());
-  EXPECT_STREQ("1st.OnTestIterationEnd", vec[2].c_str());
-}
-
-// Tests that a listener removed from a TestEventListeners list stops receiving
-// events and is not deleted when the list is destroyed.
-TEST(TestEventListenersTest, Release) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    listeners.Append(listener);
-    EXPECT_EQ(listener, listeners.Release(listener));
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_TRUE(listeners.Release(listener) == nullptr);
-  }
-  EXPECT_EQ(0, on_start_counter);
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Tests that no events are forwarded when event forwarding is disabled.
-TEST(EventListenerTest, SuppressEventForwarding) {
-  int on_start_counter = 0;
-  TestListener* listener = new TestListener(&on_start_counter, nullptr);
-
-  TestEventListeners listeners;
-  listeners.Append(listener);
-  ASSERT_TRUE(TestEventListenersAccessor::EventForwardingEnabled(listeners));
-  TestEventListenersAccessor::SuppressEventForwarding(&listeners);
-  ASSERT_FALSE(TestEventListenersAccessor::EventForwardingEnabled(listeners));
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(0, on_start_counter);
-}
-
-// Tests that events generated by Google Test are not forwarded in
-// death test subprocesses.
-TEST(EventListenerDeathTest, EventsNotForwardedInDeathTestSubprecesses) {
-  EXPECT_DEATH_IF_SUPPORTED({
-      GTEST_CHECK_(TestEventListenersAccessor::EventForwardingEnabled(
-          *GetUnitTestImpl()->listeners())) << "expected failure";},
-      "expected failure");
-}
-
-// Tests that a listener installed via SetDefaultResultPrinter() starts
-// receiving events and is returned via default_result_printer() and that
-// the previous default_result_printer is removed from the list and deleted.
-TEST(EventListenerTest, default_result_printer) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-
-  TestEventListeners listeners;
-  TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
-
-  EXPECT_EQ(listener, listeners.default_result_printer());
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-
-  EXPECT_EQ(1, on_start_counter);
-
-  // Replacing default_result_printer with something else should remove it
-  // from the list and destroy it.
-  TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, nullptr);
-
-  EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-  EXPECT_TRUE(is_destroyed);
-
-  // After broadcasting an event the counter is still the same, indicating
-  // the listener is not in the list anymore.
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(1, on_start_counter);
-}
-
-// Tests that the default_result_printer listener stops receiving events
-// when removed via Release and that is not owned by the list anymore.
-TEST(EventListenerTest, RemovingDefaultResultPrinterWorks) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
-
-    EXPECT_EQ(listener, listeners.Release(listener));
-    EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-    EXPECT_FALSE(is_destroyed);
-
-    // Broadcasting events now should not affect default_result_printer.
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(0, on_start_counter);
-  }
-  // Destroying the list should not affect the listener now, too.
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Tests that a listener installed via SetDefaultXmlGenerator() starts
-// receiving events and is returned via default_xml_generator() and that
-// the previous default_xml_generator is removed from the list and deleted.
-TEST(EventListenerTest, default_xml_generator) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-
-  TestEventListeners listeners;
-  TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
-
-  EXPECT_EQ(listener, listeners.default_xml_generator());
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-
-  EXPECT_EQ(1, on_start_counter);
-
-  // Replacing default_xml_generator with something else should remove it
-  // from the list and destroy it.
-  TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, nullptr);
-
-  EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-  EXPECT_TRUE(is_destroyed);
-
-  // After broadcasting an event the counter is still the same, indicating
-  // the listener is not in the list anymore.
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(1, on_start_counter);
-}
-
-// Tests that the default_xml_generator listener stops receiving events
-// when removed via Release and that is not owned by the list anymore.
-TEST(EventListenerTest, RemovingDefaultXmlGeneratorWorks) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
-
-    EXPECT_EQ(listener, listeners.Release(listener));
-    EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-    EXPECT_FALSE(is_destroyed);
-
-    // Broadcasting events now should not affect default_xml_generator.
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(0, on_start_counter);
-  }
-  // Destroying the list should not affect the listener now, too.
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Sanity tests to ensure that the alternative, verbose spellings of
-// some of the macros work.  We don't test them thoroughly as that
-// would be quite involved.  Since their implementations are
-// straightforward, and they are rarely used, we'll just rely on the
-// users to tell us when they are broken.
-GTEST_TEST(AlternativeNameTest, Works) {  // GTEST_TEST is the same as TEST.
-  GTEST_SUCCEED() << "OK";  // GTEST_SUCCEED is the same as SUCCEED.
-
-  // GTEST_FAIL is the same as FAIL.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL() << "An expected failure",
-                       "An expected failure");
-
-  // GTEST_ASSERT_XY is the same as ASSERT_XY.
-
-  GTEST_ASSERT_EQ(0, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_EQ(0, 1) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_EQ(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_NE(0, 1);
-  GTEST_ASSERT_NE(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_NE(0, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_LE(0, 0);
-  GTEST_ASSERT_LE(0, 1);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LE(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_LT(0, 1);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LT(0, 0) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LT(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_GE(0, 0);
-  GTEST_ASSERT_GE(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GE(0, 1) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_GT(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GT(0, 1) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GT(1, 1) << "An expected failure",
-                       "An expected failure");
-}
-
-// Tests for internal utilities necessary for implementation of the universal
-// printing.
-
-class ConversionHelperBase {};
-class ConversionHelperDerived : public ConversionHelperBase {};
-
-struct HasDebugStringMethods {
-  std::string DebugString() const { return ""; }
-  std::string ShortDebugString() const { return ""; }
-};
-
-struct InheritsDebugStringMethods : public HasDebugStringMethods {};
-
-struct WrongTypeDebugStringMethod {
-  std::string DebugString() const { return ""; }
-  int ShortDebugString() const { return 1; }
-};
-
-struct NotConstDebugStringMethod {
-  std::string DebugString() { return ""; }
-  std::string ShortDebugString() const { return ""; }
-};
-
-struct MissingDebugStringMethod {
-  std::string DebugString() { return ""; }
-};
-
-struct IncompleteType;
-
-// Tests that HasDebugStringAndShortDebugString<T>::value is a compile-time
-// constant.
-TEST(HasDebugStringAndShortDebugStringTest, ValueIsCompileTimeConstant) {
-  GTEST_COMPILE_ASSERT_(
-      HasDebugStringAndShortDebugString<HasDebugStringMethods>::value,
-      const_true);
-  GTEST_COMPILE_ASSERT_(
-      HasDebugStringAndShortDebugString<InheritsDebugStringMethods>::value,
-      const_true);
-  GTEST_COMPILE_ASSERT_(HasDebugStringAndShortDebugString<
-                            const InheritsDebugStringMethods>::value,
-                        const_true);
-  GTEST_COMPILE_ASSERT_(
-      !HasDebugStringAndShortDebugString<WrongTypeDebugStringMethod>::value,
-      const_false);
-  GTEST_COMPILE_ASSERT_(
-      !HasDebugStringAndShortDebugString<NotConstDebugStringMethod>::value,
-      const_false);
-  GTEST_COMPILE_ASSERT_(
-      !HasDebugStringAndShortDebugString<MissingDebugStringMethod>::value,
-      const_false);
-  GTEST_COMPILE_ASSERT_(
-      !HasDebugStringAndShortDebugString<IncompleteType>::value, const_false);
-  GTEST_COMPILE_ASSERT_(!HasDebugStringAndShortDebugString<int>::value,
-                        const_false);
-}
-
-// Tests that HasDebugStringAndShortDebugString<T>::value is true when T has
-// needed methods.
-TEST(HasDebugStringAndShortDebugStringTest,
-     ValueIsTrueWhenTypeHasDebugStringAndShortDebugString) {
-  EXPECT_TRUE(
-      HasDebugStringAndShortDebugString<InheritsDebugStringMethods>::value);
-}
-
-// Tests that HasDebugStringAndShortDebugString<T>::value is false when T
-// doesn't have needed methods.
-TEST(HasDebugStringAndShortDebugStringTest,
-     ValueIsFalseWhenTypeIsNotAProtocolMessage) {
-  EXPECT_FALSE(HasDebugStringAndShortDebugString<int>::value);
-  EXPECT_FALSE(
-      HasDebugStringAndShortDebugString<const ConversionHelperBase>::value);
-}
-
-// Tests GTEST_REMOVE_REFERENCE_AND_CONST_.
-
-template <typename T1, typename T2>
-void TestGTestRemoveReferenceAndConst() {
-  static_assert(std::is_same<T1, GTEST_REMOVE_REFERENCE_AND_CONST_(T2)>::value,
-                "GTEST_REMOVE_REFERENCE_AND_CONST_ failed.");
-}
-
-TEST(RemoveReferenceToConstTest, Works) {
-  TestGTestRemoveReferenceAndConst<int, int>();
-  TestGTestRemoveReferenceAndConst<double, double&>();
-  TestGTestRemoveReferenceAndConst<char, const char>();
-  TestGTestRemoveReferenceAndConst<char, const char&>();
-  TestGTestRemoveReferenceAndConst<const char*, const char*>();
-}
-
-// Tests GTEST_REFERENCE_TO_CONST_.
-
-template <typename T1, typename T2>
-void TestGTestReferenceToConst() {
-  static_assert(std::is_same<T1, GTEST_REFERENCE_TO_CONST_(T2)>::value,
-                "GTEST_REFERENCE_TO_CONST_ failed.");
-}
-
-TEST(GTestReferenceToConstTest, Works) {
-  TestGTestReferenceToConst<const char&, char>();
-  TestGTestReferenceToConst<const int&, const int>();
-  TestGTestReferenceToConst<const double&, double>();
-  TestGTestReferenceToConst<const std::string&, const std::string&>();
-}
-
-
-// Tests IsContainerTest.
-
-class NonContainer {};
-
-TEST(IsContainerTestTest, WorksForNonContainer) {
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<int>(0)));
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<char[5]>(0)));
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<NonContainer>(0)));
-}
-
-TEST(IsContainerTestTest, WorksForContainer) {
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<std::vector<bool> >(0)));
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<std::map<int, double> >(0)));
-}
-
-struct ConstOnlyContainerWithPointerIterator {
-  using const_iterator = int*;
-  const_iterator begin() const;
-  const_iterator end() const;
-};
-
-struct ConstOnlyContainerWithClassIterator {
-  struct const_iterator {
-    const int& operator*() const;
-    const_iterator& operator++(/* pre-increment */);
-  };
-  const_iterator begin() const;
-  const_iterator end() const;
-};
-
-TEST(IsContainerTestTest, ConstOnlyContainer) {
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<ConstOnlyContainerWithPointerIterator>(0)));
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<ConstOnlyContainerWithClassIterator>(0)));
-}
-
-// Tests IsHashTable.
-struct AHashTable {
-  typedef void hasher;
-};
-struct NotReallyAHashTable {
-  typedef void hasher;
-  typedef void reverse_iterator;
-};
-TEST(IsHashTable, Basic) {
-  EXPECT_TRUE(testing::internal::IsHashTable<AHashTable>::value);
-  EXPECT_FALSE(testing::internal::IsHashTable<NotReallyAHashTable>::value);
-  EXPECT_FALSE(testing::internal::IsHashTable<std::vector<int>>::value);
-  EXPECT_TRUE(testing::internal::IsHashTable<std::unordered_set<int>>::value);
-}
-
-// Tests ArrayEq().
-
-TEST(ArrayEqTest, WorksForDegeneratedArrays) {
-  EXPECT_TRUE(ArrayEq(5, 5L));
-  EXPECT_FALSE(ArrayEq('a', 0));
-}
-
-TEST(ArrayEqTest, WorksForOneDimensionalArrays) {
-  // Note that a and b are distinct but compatible types.
-  const int a[] = { 0, 1 };
-  long b[] = { 0, 1 };
-  EXPECT_TRUE(ArrayEq(a, b));
-  EXPECT_TRUE(ArrayEq(a, 2, b));
-
-  b[0] = 2;
-  EXPECT_FALSE(ArrayEq(a, b));
-  EXPECT_FALSE(ArrayEq(a, 1, b));
-}
-
-TEST(ArrayEqTest, WorksForTwoDimensionalArrays) {
-  const char a[][3] = { "hi", "lo" };
-  const char b[][3] = { "hi", "lo" };
-  const char c[][3] = { "hi", "li" };
-
-  EXPECT_TRUE(ArrayEq(a, b));
-  EXPECT_TRUE(ArrayEq(a, 2, b));
-
-  EXPECT_FALSE(ArrayEq(a, c));
-  EXPECT_FALSE(ArrayEq(a, 2, c));
-}
-
-// Tests ArrayAwareFind().
-
-TEST(ArrayAwareFindTest, WorksForOneDimensionalArray) {
-  const char a[] = "hello";
-  EXPECT_EQ(a + 4, ArrayAwareFind(a, a + 5, 'o'));
-  EXPECT_EQ(a + 5, ArrayAwareFind(a, a + 5, 'x'));
-}
-
-TEST(ArrayAwareFindTest, WorksForTwoDimensionalArray) {
-  int a[][2] = { { 0, 1 }, { 2, 3 }, { 4, 5 } };
-  const int b[2] = { 2, 3 };
-  EXPECT_EQ(a + 1, ArrayAwareFind(a, a + 3, b));
-
-  const int c[2] = { 6, 7 };
-  EXPECT_EQ(a + 3, ArrayAwareFind(a, a + 3, c));
-}
-
-// Tests CopyArray().
-
-TEST(CopyArrayTest, WorksForDegeneratedArrays) {
-  int n = 0;
-  CopyArray('a', &n);
-  EXPECT_EQ('a', n);
-}
-
-TEST(CopyArrayTest, WorksForOneDimensionalArrays) {
-  const char a[3] = "hi";
-  int b[3];
-#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
-  CopyArray(a, &b);
-  EXPECT_TRUE(ArrayEq(a, b));
-#endif
-
-  int c[3];
-  CopyArray(a, 3, c);
-  EXPECT_TRUE(ArrayEq(a, c));
-}
-
-TEST(CopyArrayTest, WorksForTwoDimensionalArrays) {
-  const int a[2][3] = { { 0, 1, 2 }, { 3, 4, 5 } };
-  int b[2][3];
-#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
-  CopyArray(a, &b);
-  EXPECT_TRUE(ArrayEq(a, b));
-#endif
-
-  int c[2][3];
-  CopyArray(a, 2, c);
-  EXPECT_TRUE(ArrayEq(a, c));
-}
-
-// Tests NativeArray.
-
-TEST(NativeArrayTest, ConstructorFromArrayWorks) {
-  const int a[3] = { 0, 1, 2 };
-  NativeArray<int> na(a, 3, RelationToSourceReference());
-  EXPECT_EQ(3U, na.size());
-  EXPECT_EQ(a, na.begin());
-}
-
-TEST(NativeArrayTest, CreatesAndDeletesCopyOfArrayWhenAskedTo) {
-  typedef int Array[2];
-  Array* a = new Array[1];
-  (*a)[0] = 0;
-  (*a)[1] = 1;
-  NativeArray<int> na(*a, 2, RelationToSourceCopy());
-  EXPECT_NE(*a, na.begin());
-  delete[] a;
-  EXPECT_EQ(0, na.begin()[0]);
-  EXPECT_EQ(1, na.begin()[1]);
-
-  // We rely on the heap checker to verify that na deletes the copy of
-  // array.
-}
-
-TEST(NativeArrayTest, TypeMembersAreCorrect) {
-  StaticAssertTypeEq<char, NativeArray<char>::value_type>();
-  StaticAssertTypeEq<int[2], NativeArray<int[2]>::value_type>();
-
-  StaticAssertTypeEq<const char*, NativeArray<char>::const_iterator>();
-  StaticAssertTypeEq<const bool(*)[2], NativeArray<bool[2]>::const_iterator>();
-}
-
-TEST(NativeArrayTest, MethodsWork) {
-  const int a[3] = { 0, 1, 2 };
-  NativeArray<int> na(a, 3, RelationToSourceCopy());
-  ASSERT_EQ(3U, na.size());
-  EXPECT_EQ(3, na.end() - na.begin());
-
-  NativeArray<int>::const_iterator it = na.begin();
-  EXPECT_EQ(0, *it);
-  ++it;
-  EXPECT_EQ(1, *it);
-  it++;
-  EXPECT_EQ(2, *it);
-  ++it;
-  EXPECT_EQ(na.end(), it);
-
-  EXPECT_TRUE(na == na);
-
-  NativeArray<int> na2(a, 3, RelationToSourceReference());
-  EXPECT_TRUE(na == na2);
-
-  const int b1[3] = { 0, 1, 1 };
-  const int b2[4] = { 0, 1, 2, 3 };
-  EXPECT_FALSE(na == NativeArray<int>(b1, 3, RelationToSourceReference()));
-  EXPECT_FALSE(na == NativeArray<int>(b2, 4, RelationToSourceCopy()));
-}
-
-TEST(NativeArrayTest, WorksForTwoDimensionalArray) {
-  const char a[2][3] = { "hi", "lo" };
-  NativeArray<char[3]> na(a, 2, RelationToSourceReference());
-  ASSERT_EQ(2U, na.size());
-  EXPECT_EQ(a, na.begin());
-}
-
-// IndexSequence
-TEST(IndexSequence, MakeIndexSequence) {
-  using testing::internal::IndexSequence;
-  using testing::internal::MakeIndexSequence;
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<>, MakeIndexSequence<0>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<0>, MakeIndexSequence<1>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<0, 1>, MakeIndexSequence<2>::type>::value));
-  EXPECT_TRUE((
-      std::is_same<IndexSequence<0, 1, 2>, MakeIndexSequence<3>::type>::value));
-  EXPECT_TRUE(
-      (std::is_base_of<IndexSequence<0, 1, 2>, MakeIndexSequence<3>>::value));
-}
-
-// ElemFromList
-TEST(ElemFromList, Basic) {
-  using testing::internal::ElemFromList;
-  EXPECT_TRUE(
-      (std::is_same<int, ElemFromList<0, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<double, ElemFromList<1, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<char, ElemFromList<2, int, double, char>::type>::value));
-  EXPECT_TRUE((
-      std::is_same<char, ElemFromList<7, int, int, int, int, int, int, int,
-                                      char, int, int, int, int>::type>::value));
-}
-
-// FlatTuple
-TEST(FlatTuple, Basic) {
-  using testing::internal::FlatTuple;
-
-  FlatTuple<int, double, const char*> tuple = {};
-  EXPECT_EQ(0, tuple.Get<0>());
-  EXPECT_EQ(0.0, tuple.Get<1>());
-  EXPECT_EQ(nullptr, tuple.Get<2>());
-
-  tuple = FlatTuple<int, double, const char*>(
-      testing::internal::FlatTupleConstructTag{}, 7, 3.2, "Foo");
-  EXPECT_EQ(7, tuple.Get<0>());
-  EXPECT_EQ(3.2, tuple.Get<1>());
-  EXPECT_EQ(std::string("Foo"), tuple.Get<2>());
-
-  tuple.Get<1>() = 5.1;
-  EXPECT_EQ(5.1, tuple.Get<1>());
-}
-
-namespace {
-std::string AddIntToString(int i, const std::string& s) {
-  return s + std::to_string(i);
-}
-}  // namespace
-
-TEST(FlatTuple, Apply) {
-  using testing::internal::FlatTuple;
-
-  FlatTuple<int, std::string> tuple{testing::internal::FlatTupleConstructTag{},
-                                    5, "Hello"};
-
-  // Lambda.
-  EXPECT_TRUE(tuple.Apply([](int i, const std::string& s) -> bool {
-    return i == static_cast<int>(s.size());
-  }));
-
-  // Function.
-  EXPECT_EQ(tuple.Apply(AddIntToString), "Hello5");
-
-  // Mutating operations.
-  tuple.Apply([](int& i, std::string& s) {
-    ++i;
-    s += s;
-  });
-  EXPECT_EQ(tuple.Get<0>(), 6);
-  EXPECT_EQ(tuple.Get<1>(), "HelloHello");
-}
-
-struct ConstructionCounting {
-  ConstructionCounting() { ++default_ctor_calls; }
-  ~ConstructionCounting() { ++dtor_calls; }
-  ConstructionCounting(const ConstructionCounting&) { ++copy_ctor_calls; }
-  ConstructionCounting(ConstructionCounting&&) noexcept { ++move_ctor_calls; }
-  ConstructionCounting& operator=(const ConstructionCounting&) {
-    ++copy_assignment_calls;
-    return *this;
-  }
-  ConstructionCounting& operator=(ConstructionCounting&&) noexcept {
-    ++move_assignment_calls;
-    return *this;
-  }
-
-  static void Reset() {
-    default_ctor_calls = 0;
-    dtor_calls = 0;
-    copy_ctor_calls = 0;
-    move_ctor_calls = 0;
-    copy_assignment_calls = 0;
-    move_assignment_calls = 0;
-  }
-
-  static int default_ctor_calls;
-  static int dtor_calls;
-  static int copy_ctor_calls;
-  static int move_ctor_calls;
-  static int copy_assignment_calls;
-  static int move_assignment_calls;
-};
-
-int ConstructionCounting::default_ctor_calls = 0;
-int ConstructionCounting::dtor_calls = 0;
-int ConstructionCounting::copy_ctor_calls = 0;
-int ConstructionCounting::move_ctor_calls = 0;
-int ConstructionCounting::copy_assignment_calls = 0;
-int ConstructionCounting::move_assignment_calls = 0;
-
-TEST(FlatTuple, ConstructorCalls) {
-  using testing::internal::FlatTuple;
-
-  // Default construction.
-  ConstructionCounting::Reset();
-  { FlatTuple<ConstructionCounting> tuple; }
-  EXPECT_EQ(ConstructionCounting::default_ctor_calls, 1);
-  EXPECT_EQ(ConstructionCounting::dtor_calls, 1);
-  EXPECT_EQ(ConstructionCounting::copy_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::copy_assignment_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_assignment_calls, 0);
-
-  // Copy construction.
-  ConstructionCounting::Reset();
-  {
-    ConstructionCounting elem;
-    FlatTuple<ConstructionCounting> tuple{
-        testing::internal::FlatTupleConstructTag{}, elem};
-  }
-  EXPECT_EQ(ConstructionCounting::default_ctor_calls, 1);
-  EXPECT_EQ(ConstructionCounting::dtor_calls, 2);
-  EXPECT_EQ(ConstructionCounting::copy_ctor_calls, 1);
-  EXPECT_EQ(ConstructionCounting::move_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::copy_assignment_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_assignment_calls, 0);
-
-  // Move construction.
-  ConstructionCounting::Reset();
-  {
-    FlatTuple<ConstructionCounting> tuple{
-        testing::internal::FlatTupleConstructTag{}, ConstructionCounting{}};
-  }
-  EXPECT_EQ(ConstructionCounting::default_ctor_calls, 1);
-  EXPECT_EQ(ConstructionCounting::dtor_calls, 2);
-  EXPECT_EQ(ConstructionCounting::copy_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_ctor_calls, 1);
-  EXPECT_EQ(ConstructionCounting::copy_assignment_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_assignment_calls, 0);
-
-  // Copy assignment.
-  // TODO(ofats): it should be testing assignment operator of FlatTuple, not its
-  // elements
-  ConstructionCounting::Reset();
-  {
-    FlatTuple<ConstructionCounting> tuple;
-    ConstructionCounting elem;
-    tuple.Get<0>() = elem;
-  }
-  EXPECT_EQ(ConstructionCounting::default_ctor_calls, 2);
-  EXPECT_EQ(ConstructionCounting::dtor_calls, 2);
-  EXPECT_EQ(ConstructionCounting::copy_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::copy_assignment_calls, 1);
-  EXPECT_EQ(ConstructionCounting::move_assignment_calls, 0);
-
-  // Move assignment.
-  // TODO(ofats): it should be testing assignment operator of FlatTuple, not its
-  // elements
-  ConstructionCounting::Reset();
-  {
-    FlatTuple<ConstructionCounting> tuple;
-    tuple.Get<0>() = ConstructionCounting{};
-  }
-  EXPECT_EQ(ConstructionCounting::default_ctor_calls, 2);
-  EXPECT_EQ(ConstructionCounting::dtor_calls, 2);
-  EXPECT_EQ(ConstructionCounting::copy_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_ctor_calls, 0);
-  EXPECT_EQ(ConstructionCounting::copy_assignment_calls, 0);
-  EXPECT_EQ(ConstructionCounting::move_assignment_calls, 1);
-
-  ConstructionCounting::Reset();
-}
-
-TEST(FlatTuple, ManyTypes) {
-  using testing::internal::FlatTuple;
-
-  // Instantiate FlatTuple with 257 ints.
-  // Tests show that we can do it with thousands of elements, but very long
-  // compile times makes it unusuitable for this test.
-#define GTEST_FLAT_TUPLE_INT8 int, int, int, int, int, int, int, int,
-#define GTEST_FLAT_TUPLE_INT16 GTEST_FLAT_TUPLE_INT8 GTEST_FLAT_TUPLE_INT8
-#define GTEST_FLAT_TUPLE_INT32 GTEST_FLAT_TUPLE_INT16 GTEST_FLAT_TUPLE_INT16
-#define GTEST_FLAT_TUPLE_INT64 GTEST_FLAT_TUPLE_INT32 GTEST_FLAT_TUPLE_INT32
-#define GTEST_FLAT_TUPLE_INT128 GTEST_FLAT_TUPLE_INT64 GTEST_FLAT_TUPLE_INT64
-#define GTEST_FLAT_TUPLE_INT256 GTEST_FLAT_TUPLE_INT128 GTEST_FLAT_TUPLE_INT128
-
-  // Let's make sure that we can have a very long list of types without blowing
-  // up the template instantiation depth.
-  FlatTuple<GTEST_FLAT_TUPLE_INT256 int> tuple;
-
-  tuple.Get<0>() = 7;
-  tuple.Get<99>() = 17;
-  tuple.Get<256>() = 1000;
-  EXPECT_EQ(7, tuple.Get<0>());
-  EXPECT_EQ(17, tuple.Get<99>());
-  EXPECT_EQ(1000, tuple.Get<256>());
-}
-
-// Tests SkipPrefix().
-
-TEST(SkipPrefixTest, SkipsWhenPrefixMatches) {
-  const char* const str = "hello";
-
-  const char* p = str;
-  EXPECT_TRUE(SkipPrefix("", &p));
-  EXPECT_EQ(str, p);
-
-  p = str;
-  EXPECT_TRUE(SkipPrefix("hell", &p));
-  EXPECT_EQ(str + 4, p);
-}
-
-TEST(SkipPrefixTest, DoesNotSkipWhenPrefixDoesNotMatch) {
-  const char* const str = "world";
-
-  const char* p = str;
-  EXPECT_FALSE(SkipPrefix("W", &p));
-  EXPECT_EQ(str, p);
-
-  p = str;
-  EXPECT_FALSE(SkipPrefix("world!", &p));
-  EXPECT_EQ(str, p);
-}
-
-// Tests ad_hoc_test_result().
-TEST(AdHocTestResultTest, AdHocTestResultForUnitTestDoesNotShowFailure) {
-  const testing::TestResult& test_result =
-      testing::UnitTest::GetInstance()->ad_hoc_test_result();
-  EXPECT_FALSE(test_result.Failed());
-}
-
-class DynamicUnitTestFixture : public testing::Test {};
-
-class DynamicTest : public DynamicUnitTestFixture {
-  void TestBody() override { EXPECT_TRUE(true); }
-};
-
-auto* dynamic_test = testing::RegisterTest(
-    "DynamicUnitTestFixture", "DynamicTest", "TYPE", "VALUE", __FILE__,
-    __LINE__, []() -> DynamicUnitTestFixture* { return new DynamicTest; });
-
-TEST(RegisterTest, WasRegistered) {
-  auto* unittest = testing::UnitTest::GetInstance();
-  for (int i = 0; i < unittest->total_test_suite_count(); ++i) {
-    auto* tests = unittest->GetTestSuite(i);
-    if (tests->name() != std::string("DynamicUnitTestFixture")) continue;
-    for (int j = 0; j < tests->total_test_count(); ++j) {
-      if (tests->GetTestInfo(j)->name() != std::string("DynamicTest")) continue;
-      // Found it.
-      EXPECT_STREQ(tests->GetTestInfo(j)->value_param(), "VALUE");
-      EXPECT_STREQ(tests->GetTestInfo(j)->type_param(), "TYPE");
-      return;
-    }
-  }
-
-  FAIL() << "Didn't find the test!";
-}
diff --git a/third_party/googletest/googletest/test/gtest_xml_outfile1_test_.cc b/third_party/googletest/googletest/test/gtest_xml_outfile1_test_.cc
deleted file mode 100644
index 19aa252..0000000
--- a/third_party/googletest/googletest/test/gtest_xml_outfile1_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// gtest_xml_outfile1_test_ writes some xml via TestProperty used by
-// gtest_xml_outfiles_test.py
-
-#include "gtest/gtest.h"
-
-class PropertyOne : public testing::Test {
- protected:
-  void SetUp() override { RecordProperty("SetUpProp", 1); }
-  void TearDown() override { RecordProperty("TearDownProp", 1); }
-};
-
-TEST_F(PropertyOne, TestSomeProperties) {
-  RecordProperty("TestSomeProperty", 1);
-}
diff --git a/third_party/googletest/googletest/test/gtest_xml_outfile2_test_.cc b/third_party/googletest/googletest/test/gtest_xml_outfile2_test_.cc
deleted file mode 100644
index f9a2a6e..0000000
--- a/third_party/googletest/googletest/test/gtest_xml_outfile2_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// gtest_xml_outfile2_test_ writes some xml via TestProperty used by
-// gtest_xml_outfiles_test.py
-
-#include "gtest/gtest.h"
-
-class PropertyTwo : public testing::Test {
- protected:
-  void SetUp() override { RecordProperty("SetUpProp", 2); }
-  void TearDown() override { RecordProperty("TearDownProp", 2); }
-};
-
-TEST_F(PropertyTwo, TestSomeProperties) {
-  RecordProperty("TestSomeProperty", 2);
-}
diff --git a/third_party/googletest/googletest/test/gtest_xml_outfiles_test.py b/third_party/googletest/googletest/test/gtest_xml_outfiles_test.py
deleted file mode 100755
index ac66feb..0000000
--- a/third_party/googletest/googletest/test/gtest_xml_outfiles_test.py
+++ /dev/null
@@ -1,135 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_xml_output module."""
-
-import os
-from xml.dom import minidom, Node
-import gtest_test_utils
-import gtest_xml_test_utils
-
-GTEST_OUTPUT_SUBDIR = "xml_outfiles"
-GTEST_OUTPUT_1_TEST = "gtest_xml_outfile1_test_"
-GTEST_OUTPUT_2_TEST = "gtest_xml_outfile2_test_"
-
-EXPECTED_XML_1 = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests">
-  <testsuite name="PropertyOne" tests="1" failures="0" skipped="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="TestSomeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyOne">
-      <properties>
-        <property name="SetUpProp" value="1"/>
-        <property name="TestSomeProperty" value="1"/>
-        <property name="TearDownProp" value="1"/>
-      </properties>
-    </testcase>
-  </testsuite>
-</testsuites>
-"""
-
-EXPECTED_XML_2 = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests">
-  <testsuite name="PropertyTwo" tests="1" failures="0" skipped="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="TestSomeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyTwo">
-      <properties>
-        <property name="SetUpProp" value="2"/>
-        <property name="TestSomeProperty" value="2"/>
-        <property name="TearDownProp" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-</testsuites>
-"""
-
-
-class GTestXMLOutFilesTest(gtest_xml_test_utils.GTestXMLTestCase):
-  """Unit test for Google Test's XML output functionality."""
-
-  def setUp(self):
-    # We want the trailing '/' that the last "" provides in os.path.join, for
-    # telling Google Test to create an output directory instead of a single file
-    # for xml output.
-    self.output_dir_ = os.path.join(gtest_test_utils.GetTempDir(),
-                                    GTEST_OUTPUT_SUBDIR, "")
-    self.DeleteFilesAndDir()
-
-  def tearDown(self):
-    self.DeleteFilesAndDir()
-
-  def DeleteFilesAndDir(self):
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_1_TEST + ".xml"))
-    except os.error:
-      pass
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_2_TEST + ".xml"))
-    except os.error:
-      pass
-    try:
-      os.rmdir(self.output_dir_)
-    except os.error:
-      pass
-
-  def testOutfile1(self):
-    self._TestOutFile(GTEST_OUTPUT_1_TEST, EXPECTED_XML_1)
-
-  def testOutfile2(self):
-    self._TestOutFile(GTEST_OUTPUT_2_TEST, EXPECTED_XML_2)
-
-  def _TestOutFile(self, test_name, expected_xml):
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(test_name)
-    command = [gtest_prog_path, "--gtest_output=xml:%s" % self.output_dir_]
-    p = gtest_test_utils.Subprocess(command,
-                                    working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-
-    output_file_name1 = test_name + ".xml"
-    output_file1 = os.path.join(self.output_dir_, output_file_name1)
-    output_file_name2 = 'lt-' + output_file_name1
-    output_file2 = os.path.join(self.output_dir_, output_file_name2)
-    self.assert_(os.path.isfile(output_file1) or os.path.isfile(output_file2),
-                 output_file1)
-
-    expected = minidom.parseString(expected_xml)
-    if os.path.isfile(output_file1):
-      actual = minidom.parse(output_file1)
-    else:
-      actual = minidom.parse(output_file2)
-    self.NormalizeXml(actual.documentElement)
-    self.AssertEquivalentNodes(expected.documentElement,
-                               actual.documentElement)
-    expected.unlink()
-    actual.unlink()
-
-
-if __name__ == "__main__":
-  os.environ["GTEST_STACK_TRACE_DEPTH"] = "0"
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_xml_output_unittest.py b/third_party/googletest/googletest/test/gtest_xml_output_unittest.py
deleted file mode 100755
index eade7aa..0000000
--- a/third_party/googletest/googletest/test/gtest_xml_output_unittest.py
+++ /dev/null
@@ -1,415 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_xml_output module"""
-
-import datetime
-import errno
-import os
-import re
-import sys
-from xml.dom import minidom, Node
-
-import gtest_test_utils
-import gtest_xml_test_utils
-
-GTEST_FILTER_FLAG = '--gtest_filter'
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
-GTEST_PROGRAM_NAME = 'gtest_xml_output_unittest_'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
-
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-if SUPPORTS_STACK_TRACES:
-  STACK_TRACE_TEMPLATE = '\nStack trace:\n*'
-else:
-  STACK_TRACE_TEMPLATE = ''
-  # unittest.main() can't handle unknown flags
-  sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-EXPECTED_NON_EMPTY_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="26" failures="5" disabled="2" errors="0" time="*" timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-  <testsuite name="FailedTest" tests="1" failures="1" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="Fails" status="run" result="completed" time="*" timestamp="*" classname="FailedTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="MixedResultTest" tests="3" failures="1" disabled="1" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="MixedResultTest"/>
-    <testcase name="Fails" status="run" result="completed" time="*" timestamp="*" classname="MixedResultTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  2&#x0A;  3" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  2
-  3%(stack)s]]></failure>
-    </testcase>
-    <testcase name="DISABLED_test" status="notrun" result="suppressed" time="*" timestamp="*" classname="MixedResultTest"/>
-  </testsuite>
-  <testsuite name="XmlQuotingTest" tests="1" failures="1" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="OutputsCData" status="run" result="completed" time="*" timestamp="*" classname="XmlQuotingTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Failed&#x0A;XML output: &lt;?xml encoding=&quot;utf-8&quot;&gt;&lt;top&gt;&lt;![CDATA[cdata text]]&gt;&lt;/top&gt;" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Failed
-XML output: <?xml encoding="utf-8"><top><![CDATA[cdata text]]>]]&gt;<![CDATA[</top>%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="InvalidCharactersTest" tests="1" failures="1" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="InvalidCharactersInMessage" status="run" result="completed" time="*" timestamp="*" classname="InvalidCharactersTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Failed&#x0A;Invalid characters in brackets []" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Failed
-Invalid characters in brackets []%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="DisabledTest" tests="1" failures="0" disabled="1" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="DISABLED_test_not_run" status="notrun" result="suppressed" time="*" timestamp="*" classname="DisabledTest"/>
-  </testsuite>
-  <testsuite name="SkippedTest" tests="3" failures="1" disabled="0" skipped="2" errors="0" time="*" timestamp="*">
-    <testcase name="Skipped" status="run" result="skipped" time="*" timestamp="*" classname="SkippedTest">
-      <skipped message="gtest_xml_output_unittest_.cc:*&#x0A;"><![CDATA[gtest_xml_output_unittest_.cc:*
-%(stack)s]]></skipped>
-    </testcase>
-    <testcase name="SkippedWithMessage" status="run" result="skipped" time="*" timestamp="*" classname="SkippedTest">
-      <skipped message="gtest_xml_output_unittest_.cc:*&#x0A;It is good practice to tell why you skip a test."><![CDATA[gtest_xml_output_unittest_.cc:*
-It is good practice to tell why you skip a test.%(stack)s]]></skipped>
-    </testcase>
-    <testcase name="SkippedAfterFailure" status="run" result="completed" time="*" timestamp="*" classname="SkippedTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-      <skipped message="gtest_xml_output_unittest_.cc:*&#x0A;It is good practice to tell why you skip a test."><![CDATA[gtest_xml_output_unittest_.cc:*
-It is good practice to tell why you skip a test.%(stack)s]]></skipped>
-    </testcase>
-
-  </testsuite>
-  <testsuite name="PropertyRecordingTest" tests="4" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*" SetUpTestSuite="yes" TearDownTestSuite="aye">
-    <testcase name="OneProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="1"/>
-      </properties>
-    </testcase>
-    <testcase name="IntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_int" value="1"/>
-      </properties>
-    </testcase>
-    <testcase name="ThreeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="1"/>
-        <property name="key_2" value="2"/>
-        <property name="key_3" value="3"/>
-      </properties>
-    </testcase>
-    <testcase name="TwoValuesForOneKeyUsesLastValue" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-  <testsuite name="NoFixtureTest" tests="3" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-     <testcase name="RecordProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key" value="1"/>
-       </properties>
-     </testcase>
-     <testcase name="ExternalUtilityThatCallsRecordIntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key_for_utility_int" value="1"/>
-       </properties>
-     </testcase>
-     <testcase name="ExternalUtilityThatCallsRecordStringValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key_for_utility_string" value="1"/>
-       </properties>
-     </testcase>
-  </testsuite>
-  <testsuite name="Single/ValueParamTest" tests="4" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="HasValueParamAttribute/1" value_param="42" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="AnotherTestThatHasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="AnotherTestThatHasValueParamAttribute/1" value_param="42" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-  </testsuite>
-  <testsuite name="TypedTest/0" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="TypedTest/0" />
-  </testsuite>
-  <testsuite name="TypedTest/1" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="TypedTest/1" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/0" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="Single/TypeParameterizedTestSuite/0" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/1" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="Single/TypeParameterizedTestSuite/1" />
-  </testsuite>
-</testsuites>""" % {
-    'stack': STACK_TRACE_TEMPLATE
-}
-
-EXPECTED_FILTERED_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*"
-            timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" skipped="0"
-             errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-</testsuites>"""
-
-EXPECTED_SHARDED_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="3" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-  <testsuite name="PropertyRecordingTest" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*" SetUpTestSuite="yes" TearDownTestSuite="aye">
-    <testcase name="IntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_int" value="1"/>
-      </properties>
-    </testcase>
-  </testsuite>
-  <testsuite name="Single/ValueParamTest" tests="1" failures="0" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-  </testsuite>
-</testsuites>"""
-
-EXPECTED_NO_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="0" failures="0" disabled="0" errors="0" time="*"
-            timestamp="*" name="AllTests">
-  <testsuite name="NonTestSuiteFailure" tests="1" failures="1" disabled="0" skipped="0" errors="0" time="*" timestamp="*">
-    <testcase name="" status="run" result="completed" time="*" timestamp="*" classname="">
-      <failure message="gtest_no_test_unittest.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_no_test_unittest.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-</testsuites>""" % {
-    'stack': STACK_TRACE_TEMPLATE
-}
-
-GTEST_PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
-
-SUPPORTS_TYPED_TESTS = 'TypedTest' in gtest_test_utils.Subprocess(
-    [GTEST_PROGRAM_PATH, GTEST_LIST_TESTS_FLAG], capture_stderr=False).output
-
-
-class GTestXMLOutputUnitTest(gtest_xml_test_utils.GTestXMLTestCase):
-  """
-  Unit test for Google Test's XML output functionality.
-  """
-
-  # This test currently breaks on platforms that do not support typed and
-  # type-parameterized tests, so we don't run it under them.
-  if SUPPORTS_TYPED_TESTS:
-    def testNonEmptyXmlOutput(self):
-      """
-      Runs a test program that generates a non-empty XML output, and
-      tests that the XML output is expected.
-      """
-      self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY_XML, 1)
-
-  def testNoTestXmlOutput(self):
-    """Verifies XML output for a Google Test binary without actual tests.
-
-    Runs a test program that generates an XML output for a binary without tests,
-    and tests that the XML output is expected.
-    """
-
-    self._TestXmlOutput('gtest_no_test_unittest', EXPECTED_NO_TEST_XML, 0)
-
-  def testTimestampValue(self):
-    """Checks whether the timestamp attribute in the XML output is valid.
-
-    Runs a test program that generates an empty XML output, and checks if
-    the timestamp attribute in the testsuites tag is valid.
-    """
-    actual = self._GetXmlOutput('gtest_no_test_unittest', [], {}, 0)
-    date_time_str = actual.documentElement.getAttributeNode('timestamp').value
-    # datetime.strptime() is only available in Python 2.5+ so we have to
-    # parse the expected datetime manually.
-    match = re.match(r'(\d+)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)', date_time_str)
-    self.assertTrue(
-        re.match,
-        'XML datettime string %s has incorrect format' % date_time_str)
-    date_time_from_xml = datetime.datetime(
-        year=int(match.group(1)), month=int(match.group(2)),
-        day=int(match.group(3)), hour=int(match.group(4)),
-        minute=int(match.group(5)), second=int(match.group(6)))
-
-    time_delta = abs(datetime.datetime.now() - date_time_from_xml)
-    # timestamp value should be near the current local time
-    self.assertTrue(time_delta < datetime.timedelta(seconds=600),
-                    'time_delta is %s' % time_delta)
-    actual.unlink()
-
-  def testDefaultOutputFile(self):
-    """
-    Confirms that Google Test produces an XML output file with the expected
-    default name if no name is explicitly specified.
-    """
-    output_file = os.path.join(gtest_test_utils.GetTempDir(),
-                               GTEST_DEFAULT_OUTPUT_FILE)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_no_test_unittest')
-    try:
-      os.remove(output_file)
-    except OSError:
-      e = sys.exc_info()[1]
-      if e.errno != errno.ENOENT:
-        raise
-
-    p = gtest_test_utils.Subprocess(
-        [gtest_prog_path, '%s=xml' % GTEST_OUTPUT_FLAG],
-        working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    self.assert_(os.path.isfile(output_file))
-
-  def testSuppressedXmlOutput(self):
-    """
-    Tests that no XML file is generated if the default XML listener is
-    shut down before RUN_ALL_TESTS is invoked.
-    """
-
-    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                            GTEST_PROGRAM_NAME + 'out.xml')
-    if os.path.isfile(xml_path):
-      os.remove(xml_path)
-
-    command = [GTEST_PROGRAM_PATH,
-               '%s=xml:%s' % (GTEST_OUTPUT_FLAG, xml_path),
-               '--shut_down_xml']
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      # p.signal is available only if p.terminated_by_signal is True.
-      self.assertFalse(
-          p.terminated_by_signal,
-          '%s was killed by signal %d' % (GTEST_PROGRAM_NAME, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(1, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, 1))
-
-    self.assert_(not os.path.isfile(xml_path))
-
-  def testFilteredTestXmlOutput(self):
-    """Verifies XML output when a filter is applied.
-
-    Runs a test program that executes only some tests and verifies that
-    non-selected tests do not show up in the XML output.
-    """
-
-    self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_FILTERED_TEST_XML, 0,
-                        extra_args=['%s=SuccessfulTest.*' % GTEST_FILTER_FLAG])
-
-  def testShardedTestXmlOutput(self):
-    """Verifies XML output when run using multiple shards.
-
-    Runs a test program that executes only one shard and verifies that tests
-    from other shards do not show up in the XML output.
-    """
-
-    self._TestXmlOutput(
-        GTEST_PROGRAM_NAME,
-        EXPECTED_SHARDED_TEST_XML,
-        0,
-        extra_env={SHARD_INDEX_ENV_VAR: '0',
-                   TOTAL_SHARDS_ENV_VAR: '10'})
-
-  def _GetXmlOutput(self, gtest_prog_name, extra_args, extra_env,
-                    expected_exit_code):
-    """
-    Returns the xml output generated by running the program gtest_prog_name.
-    Furthermore, the program's exit code must be expected_exit_code.
-    """
-    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                            gtest_prog_name + 'out.xml')
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(gtest_prog_name)
-
-    command = ([gtest_prog_path, '%s=xml:%s' % (GTEST_OUTPUT_FLAG, xml_path)] +
-               extra_args)
-    environ_copy = os.environ.copy()
-    if extra_env:
-      environ_copy.update(extra_env)
-    p = gtest_test_utils.Subprocess(command, env=environ_copy)
-
-    if p.terminated_by_signal:
-      self.assert_(False,
-                   '%s was killed by signal %d' % (gtest_prog_name, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(expected_exit_code, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, expected_exit_code))
-    actual = minidom.parse(xml_path)
-    return actual
-
-  def _TestXmlOutput(self, gtest_prog_name, expected_xml,
-                     expected_exit_code, extra_args=None, extra_env=None):
-    """
-    Asserts that the XML document generated by running the program
-    gtest_prog_name matches expected_xml, a string containing another
-    XML document.  Furthermore, the program's exit code must be
-    expected_exit_code.
-    """
-
-    actual = self._GetXmlOutput(gtest_prog_name, extra_args or [],
-                                extra_env or {}, expected_exit_code)
-    expected = minidom.parseString(expected_xml)
-    self.NormalizeXml(actual.documentElement)
-    self.AssertEquivalentNodes(expected.documentElement,
-                               actual.documentElement)
-    expected.unlink()
-    actual.unlink()
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/third_party/googletest/googletest/test/gtest_xml_output_unittest_.cc b/third_party/googletest/googletest/test/gtest_xml_output_unittest_.cc
deleted file mode 100644
index c0036aa..0000000
--- a/third_party/googletest/googletest/test/gtest_xml_output_unittest_.cc
+++ /dev/null
@@ -1,193 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Unit test for Google Test XML output.
-//
-// A user can specify XML output in a Google Test program to run via
-// either the GTEST_OUTPUT environment variable or the --gtest_output
-// flag.  This is used for testing such functionality.
-//
-// This program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-using ::testing::InitGoogleTest;
-using ::testing::TestEventListeners;
-using ::testing::TestWithParam;
-using ::testing::UnitTest;
-using ::testing::Test;
-using ::testing::Values;
-
-class SuccessfulTest : public Test {
-};
-
-TEST_F(SuccessfulTest, Succeeds) {
-  SUCCEED() << "This is a success.";
-  ASSERT_EQ(1, 1);
-}
-
-class FailedTest : public Test {
-};
-
-TEST_F(FailedTest, Fails) {
-  ASSERT_EQ(1, 2);
-}
-
-class DisabledTest : public Test {
-};
-
-TEST_F(DisabledTest, DISABLED_test_not_run) {
-  FAIL() << "Unexpected failure: Disabled test should not be run";
-}
-
-class SkippedTest : public Test {
-};
-
-TEST_F(SkippedTest, Skipped) {
-  GTEST_SKIP();
-}
-
-TEST_F(SkippedTest, SkippedWithMessage) {
-  GTEST_SKIP() << "It is good practice to tell why you skip a test.";
-}
-
-TEST_F(SkippedTest, SkippedAfterFailure) {
-  EXPECT_EQ(1, 2);
-  GTEST_SKIP() << "It is good practice to tell why you skip a test.";
-}
-
-TEST(MixedResultTest, Succeeds) {
-  EXPECT_EQ(1, 1);
-  ASSERT_EQ(1, 1);
-}
-
-TEST(MixedResultTest, Fails) {
-  EXPECT_EQ(1, 2);
-  ASSERT_EQ(2, 3);
-}
-
-TEST(MixedResultTest, DISABLED_test) {
-  FAIL() << "Unexpected failure: Disabled test should not be run";
-}
-
-TEST(XmlQuotingTest, OutputsCData) {
-  FAIL() << "XML output: "
-            "<?xml encoding=\"utf-8\"><top><![CDATA[cdata text]]></top>";
-}
-
-// Helps to test that invalid characters produced by test code do not make
-// it into the XML file.
-TEST(InvalidCharactersTest, InvalidCharactersInMessage) {
-  FAIL() << "Invalid characters in brackets [\x1\x2]";
-}
-
-class PropertyRecordingTest : public Test {
- public:
-  static void SetUpTestSuite() { RecordProperty("SetUpTestSuite", "yes"); }
-  static void TearDownTestSuite() {
-    RecordProperty("TearDownTestSuite", "aye");
-  }
-};
-
-TEST_F(PropertyRecordingTest, OneProperty) {
-  RecordProperty("key_1", "1");
-}
-
-TEST_F(PropertyRecordingTest, IntValuedProperty) {
-  RecordProperty("key_int", 1);
-}
-
-TEST_F(PropertyRecordingTest, ThreeProperties) {
-  RecordProperty("key_1", "1");
-  RecordProperty("key_2", "2");
-  RecordProperty("key_3", "3");
-}
-
-TEST_F(PropertyRecordingTest, TwoValuesForOneKeyUsesLastValue) {
-  RecordProperty("key_1", "1");
-  RecordProperty("key_1", "2");
-}
-
-TEST(NoFixtureTest, RecordProperty) {
-  RecordProperty("key", "1");
-}
-
-void ExternalUtilityThatCallsRecordProperty(const std::string& key, int value) {
-  testing::Test::RecordProperty(key, value);
-}
-
-void ExternalUtilityThatCallsRecordProperty(const std::string& key,
-                                            const std::string& value) {
-  testing::Test::RecordProperty(key, value);
-}
-
-TEST(NoFixtureTest, ExternalUtilityThatCallsRecordIntValuedProperty) {
-  ExternalUtilityThatCallsRecordProperty("key_for_utility_int", 1);
-}
-
-TEST(NoFixtureTest, ExternalUtilityThatCallsRecordStringValuedProperty) {
-  ExternalUtilityThatCallsRecordProperty("key_for_utility_string", "1");
-}
-
-// Verifies that the test parameter value is output in the 'value_param'
-// XML attribute for value-parameterized tests.
-class ValueParamTest : public TestWithParam<int> {};
-TEST_P(ValueParamTest, HasValueParamAttribute) {}
-TEST_P(ValueParamTest, AnotherTestThatHasValueParamAttribute) {}
-INSTANTIATE_TEST_SUITE_P(Single, ValueParamTest, Values(33, 42));
-
-// Verifies that the type parameter name is output in the 'type_param'
-// XML attribute for typed tests.
-template <typename T> class TypedTest : public Test {};
-typedef testing::Types<int, long> TypedTestTypes;
-TYPED_TEST_SUITE(TypedTest, TypedTestTypes);
-TYPED_TEST(TypedTest, HasTypeParamAttribute) {}
-
-// Verifies that the type parameter name is output in the 'type_param'
-// XML attribute for type-parameterized tests.
-template <typename T>
-class TypeParameterizedTestSuite : public Test {};
-TYPED_TEST_SUITE_P(TypeParameterizedTestSuite);
-TYPED_TEST_P(TypeParameterizedTestSuite, HasTypeParamAttribute) {}
-REGISTER_TYPED_TEST_SUITE_P(TypeParameterizedTestSuite, HasTypeParamAttribute);
-typedef testing::Types<int, long> TypeParameterizedTestSuiteTypes;  // NOLINT
-INSTANTIATE_TYPED_TEST_SUITE_P(Single, TypeParameterizedTestSuite,
-                               TypeParameterizedTestSuiteTypes);
-
-int main(int argc, char** argv) {
-  InitGoogleTest(&argc, argv);
-
-  if (argc > 1 && strcmp(argv[1], "--shut_down_xml") == 0) {
-    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-    delete listeners.Release(listeners.default_xml_generator());
-  }
-  testing::Test::RecordProperty("ad_hoc_property", "42");
-  return RUN_ALL_TESTS();
-}
diff --git a/third_party/googletest/googletest/test/gtest_xml_test_utils.py b/third_party/googletest/googletest/test/gtest_xml_test_utils.py
deleted file mode 100755
index ec42c62..0000000
--- a/third_party/googletest/googletest/test/gtest_xml_test_utils.py
+++ /dev/null
@@ -1,197 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for gtest_xml_output"""
-
-import re
-from xml.dom import minidom, Node
-import gtest_test_utils
-
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
-
-class GTestXMLTestCase(gtest_test_utils.TestCase):
-  """
-  Base class for tests of Google Test's XML output functionality.
-  """
-
-
-  def AssertEquivalentNodes(self, expected_node, actual_node):
-    """
-    Asserts that actual_node (a DOM node object) is equivalent to
-    expected_node (another DOM node object), in that either both of
-    them are CDATA nodes and have the same value, or both are DOM
-    elements and actual_node meets all of the following conditions:
-
-    *  It has the same tag name as expected_node.
-    *  It has the same set of attributes as expected_node, each with
-       the same value as the corresponding attribute of expected_node.
-       Exceptions are any attribute named "time", which needs only be
-       convertible to a floating-point number and any attribute named
-       "type_param" which only has to be non-empty.
-    *  It has an equivalent set of child nodes (including elements and
-       CDATA sections) as expected_node.  Note that we ignore the
-       order of the children as they are not guaranteed to be in any
-       particular order.
-    """
-
-    if expected_node.nodeType == Node.CDATA_SECTION_NODE:
-      self.assertEquals(Node.CDATA_SECTION_NODE, actual_node.nodeType)
-      self.assertEquals(expected_node.nodeValue, actual_node.nodeValue)
-      return
-
-    self.assertEquals(Node.ELEMENT_NODE, actual_node.nodeType)
-    self.assertEquals(Node.ELEMENT_NODE, expected_node.nodeType)
-    self.assertEquals(expected_node.tagName, actual_node.tagName)
-
-    expected_attributes = expected_node.attributes
-    actual_attributes = actual_node.attributes
-    self.assertEquals(
-        expected_attributes.length, actual_attributes.length,
-        'attribute numbers differ in element %s:\nExpected: %r\nActual: %r' % (
-            actual_node.tagName, expected_attributes.keys(),
-            actual_attributes.keys()))
-    for i in range(expected_attributes.length):
-      expected_attr = expected_attributes.item(i)
-      actual_attr = actual_attributes.get(expected_attr.name)
-      self.assert_(
-          actual_attr is not None,
-          'expected attribute %s not found in element %s' %
-          (expected_attr.name, actual_node.tagName))
-      self.assertEquals(
-          expected_attr.value, actual_attr.value,
-          ' values of attribute %s in element %s differ: %s vs %s' %
-          (expected_attr.name, actual_node.tagName,
-           expected_attr.value, actual_attr.value))
-
-    expected_children = self._GetChildren(expected_node)
-    actual_children = self._GetChildren(actual_node)
-    self.assertEquals(
-        len(expected_children), len(actual_children),
-        'number of child elements differ in element ' + actual_node.tagName)
-    for child_id, child in expected_children.items():
-      self.assert_(child_id in actual_children,
-                   '<%s> is not in <%s> (in element %s)' %
-                   (child_id, actual_children, actual_node.tagName))
-      self.AssertEquivalentNodes(child, actual_children[child_id])
-
-  identifying_attribute = {
-      'testsuites': 'name',
-      'testsuite': 'name',
-      'testcase': 'name',
-      'failure': 'message',
-      'skipped': 'message',
-      'property': 'name',
-  }
-
-  def _GetChildren(self, element):
-    """
-    Fetches all of the child nodes of element, a DOM Element object.
-    Returns them as the values of a dictionary keyed by the IDs of the
-    children.  For <testsuites>, <testsuite>, <testcase>, and <property>
-    elements, the ID is the value of their "name" attribute; for <failure>
-    elements, it is the value of the "message" attribute; for <properties>
-    elements, it is the value of their parent's "name" attribute plus the
-    literal string "properties"; CDATA sections and non-whitespace
-    text nodes are concatenated into a single CDATA section with ID
-    "detail".  An exception is raised if any element other than the above
-    four is encountered, if two child elements with the same identifying
-    attributes are encountered, or if any other type of node is encountered.
-    """
-
-    children = {}
-    for child in element.childNodes:
-      if child.nodeType == Node.ELEMENT_NODE:
-        if child.tagName == 'properties':
-          self.assert_(child.parentNode is not None,
-                       'Encountered <properties> element without a parent')
-          child_id = child.parentNode.getAttribute('name') + '-properties'
-        else:
-          self.assert_(child.tagName in self.identifying_attribute,
-                       'Encountered unknown element <%s>' % child.tagName)
-          child_id = child.getAttribute(
-              self.identifying_attribute[child.tagName])
-        self.assert_(child_id not in children)
-        children[child_id] = child
-      elif child.nodeType in [Node.TEXT_NODE, Node.CDATA_SECTION_NODE]:
-        if 'detail' not in children:
-          if (child.nodeType == Node.CDATA_SECTION_NODE or
-              not child.nodeValue.isspace()):
-            children['detail'] = child.ownerDocument.createCDATASection(
-                child.nodeValue)
-        else:
-          children['detail'].nodeValue += child.nodeValue
-      else:
-        self.fail('Encountered unexpected node type %d' % child.nodeType)
-    return children
-
-  def NormalizeXml(self, element):
-    """
-    Normalizes Google Test's XML output to eliminate references to transient
-    information that may change from run to run.
-
-    *  The "time" attribute of <testsuites>, <testsuite> and <testcase>
-       elements is replaced with a single asterisk, if it contains
-       only digit characters.
-    *  The "timestamp" attribute of <testsuites> elements is replaced with a
-       single asterisk, if it contains a valid ISO8601 datetime value.
-    *  The "type_param" attribute of <testcase> elements is replaced with a
-       single asterisk (if it sn non-empty) as it is the type name returned
-       by the compiler and is platform dependent.
-    *  The line info reported in the first line of the "message"
-       attribute and CDATA section of <failure> elements is replaced with the
-       file's basename and a single asterisk for the line number.
-    *  The directory names in file paths are removed.
-    *  The stack traces are removed.
-    """
-
-    if element.tagName in ('testsuites', 'testsuite', 'testcase'):
-      timestamp = element.getAttributeNode('timestamp')
-      timestamp.value = re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d$',
-                               '*', timestamp.value)
-    if element.tagName in ('testsuites', 'testsuite', 'testcase'):
-      time = element.getAttributeNode('time')
-      time.value = re.sub(r'^\d+(\.\d+)?$', '*', time.value)
-      type_param = element.getAttributeNode('type_param')
-      if type_param and type_param.value:
-        type_param.value = '*'
-    elif element.tagName == 'failure' or element.tagName == 'skipped':
-      source_line_pat = r'^.*[/\\](.*:)\d+\n'
-      # Replaces the source line information with a normalized form.
-      message = element.getAttributeNode('message')
-      message.value = re.sub(source_line_pat, '\\1*\n', message.value)
-      for child in element.childNodes:
-        if child.nodeType == Node.CDATA_SECTION_NODE:
-          # Replaces the source line information with a normalized form.
-          cdata = re.sub(source_line_pat, '\\1*\n', child.nodeValue)
-          # Removes the actual stack trace.
-          child.nodeValue = re.sub(r'Stack trace:\n(.|\n)*',
-                                   'Stack trace:\n*', cdata)
-    for child in element.childNodes:
-      if child.nodeType == Node.ELEMENT_NODE:
-        self.NormalizeXml(child)
diff --git a/third_party/googletest/googletest/test/production.cc b/third_party/googletest/googletest/test/production.cc
deleted file mode 100644
index 0f69f6d..0000000
--- a/third_party/googletest/googletest/test/production.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This is part of the unit test for gtest_prod.h.
-
-#include "production.h"
-
-PrivateCode::PrivateCode() : x_(0) {}
diff --git a/third_party/googletest/googletest/test/production.h b/third_party/googletest/googletest/test/production.h
deleted file mode 100644
index 41a5472..0000000
--- a/third_party/googletest/googletest/test/production.h
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This is part of the unit test for gtest_prod.h.
-
-#ifndef GOOGLETEST_TEST_PRODUCTION_H_
-#define GOOGLETEST_TEST_PRODUCTION_H_
-
-#include "gtest/gtest_prod.h"
-
-class PrivateCode {
- public:
-  // Declares a friend test that does not use a fixture.
-  FRIEND_TEST(PrivateCodeTest, CanAccessPrivateMembers);
-
-  // Declares a friend test that uses a fixture.
-  FRIEND_TEST(PrivateCodeFixtureTest, CanAccessPrivateMembers);
-
-  PrivateCode();
-
-  int x() const { return x_; }
- private:
-  void set_x(int an_x) { x_ = an_x; }
-  int x_;
-};
-
-#endif  // GOOGLETEST_TEST_PRODUCTION_H_
diff --git a/third_party/googletest/library.json b/third_party/googletest/library.json
deleted file mode 100644
index f61bf00..0000000
--- a/third_party/googletest/library.json
+++ /dev/null
@@ -1,62 +0,0 @@
-{
-  "name": "googletest",
-  "keywords": "unittest, unit, test, gtest, gmock",
-  "description": "googletest is a testing framework developed by the Testing Technology team with Google's specific requirements and constraints in mind. No matter whether you work on Linux, Windows, or a Mac, if you write C++ code, googletest can help you. And it supports any kind of tests, not just unit tests.",
-   "license": "BSD-3-Clause",
-  "homepage": "https://github.com/google/googletest/blob/master/README.md",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/google/googletest.git"
-  },
-  "version": "1.10.0",
-  "frameworks": "arduino",
-  "platforms": [
-        "espressif32",
-        "espressif8266"
-  ],
-  "export": {
-        "include": [
-            "googlemock/include/*",
-            "googlemock/src/*",
-            "googletest/include/*",
-            "googletest/src/*"
-        ],
-        "exclude": [
-            "ci",
-            "googlemock/cmake",
-            "googlemock/scripts",
-            "googlemock/test",
-            "googlemock/CMakeLists.txt",
-            "googletest/cmake",
-            "googletest/scripts",
-            "googletest/test",
-            "googletest/CMakeLists.txt"
-          ]
-  },
-  "build": {
-        "flags": [
-            "-Igooglemock/include",
-            "-Igooglemock",
-            "-Igoogletest/include",
-            "-Igoogletest"
-        ],
-        "srcFilter": [
-          "+<*>",
-          "-<.git/>",
-          "-<googlemock>",
-          "-<googlemock/test/>",
-          "-<googlemock/src>",
-          "+<googlemock/src/gmock-all.cc>",
-          "+<googletest/src/gtest-all.cc>",
-          "+<googlemock/src/gmock_main.cc>",
-          "-<googletest>",
-          "-<googletest/codegear/>",
-          "-<googletest/samples>",
-          "-<googletest/test/>",
-          "-<googletest/xcode>",
-          "-<googletest/src>",
-          "+<googletest/src/gtest-all.cc>",
-          "+<googletest/src/gtest_main.cc>"
-        ]
-  }
-}
diff --git a/third_party/websocketpp/websocketpp.patch b/third_party/websocketpp/websocketpp.patch
new file mode 100644
index 0000000..6c2292b
--- /dev/null
+++ b/third_party/websocketpp/websocketpp.patch
@@ -0,0 +1,236 @@
+diff --git a/websocketpp/endpoint.hpp b/websocketpp/endpoint.hpp
+index c124b1d..177bda6 100644
+--- a/websocketpp/endpoint.hpp
++++ b/websocketpp/endpoint.hpp
+@@ -109,26 +109,26 @@ public:
+ 
+ 
+     /// Destructor
+-    ~endpoint<connection,config>() {}
++    ~endpoint() {}
+ 
+     #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+         // no copy constructor because endpoints are not copyable
+         endpoint(endpoint &) = delete;
+-    
++
+         // no copy assignment operator because endpoints are not copyable
+         endpoint & operator=(endpoint const &) = delete;
+     #endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ 
+     #ifdef _WEBSOCKETPP_MOVE_SEMANTICS_
+         /// Move constructor
+-        endpoint(endpoint && o) 
++        endpoint(endpoint && o)
+          : config::transport_type(std::move(o))
+          , config::endpoint_base(std::move(o))
+          , m_alog(std::move(o.m_alog))
+          , m_elog(std::move(o.m_elog))
+          , m_user_agent(std::move(o.m_user_agent))
+          , m_open_handler(std::move(o.m_open_handler))
+-         
++
+          , m_close_handler(std::move(o.m_close_handler))
+          , m_fail_handler(std::move(o.m_fail_handler))
+          , m_ping_handler(std::move(o.m_ping_handler))
+@@ -146,7 +146,7 @@ public:
+          , m_max_http_body_size(o.m_max_http_body_size)
+ 
+          , m_rng(std::move(o.m_rng))
+-         , m_is_server(o.m_is_server)         
++         , m_is_server(o.m_is_server)
+         {}
+ 
+     #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+@@ -403,9 +403,9 @@ public:
+ 
+     /// Get default maximum message size
+     /**
+-     * Get the default maximum message size that will be used for new 
++     * Get the default maximum message size that will be used for new
+      * connections created by this endpoint. The maximum message size determines
+-     * the point at which the connection will fail a connection with the 
++     * the point at which the connection will fail a connection with the
+      * message_too_big protocol error.
+      *
+      * The default is set by the max_message_size value from the template config
+@@ -415,10 +415,10 @@ public:
+     size_t get_max_message_size() const {
+         return m_max_message_size;
+     }
+-    
++
+     /// Set default maximum message size
+     /**
+-     * Set the default maximum message size that will be used for new 
++     * Set the default maximum message size that will be used for new
+      * connections created by this endpoint. Maximum message size determines the
+      * point at which the connection will fail a connection with the
+      * message_too_big protocol error.
+@@ -449,7 +449,7 @@ public:
+     size_t get_max_http_body_size() const {
+         return m_max_http_body_size;
+     }
+-    
++
+     /// Set maximum HTTP message body size
+     /**
+      * Set maximum HTTP message body size. Maximum message body size determines
+@@ -484,32 +484,32 @@ public:
+ 
+     /// Pause reading of new data (exception free)
+     /**
+-     * Signals to the connection to halt reading of new data. While reading is 
++     * Signals to the connection to halt reading of new data. While reading is
+      * paused, the connection will stop reading from its associated socket. In
+      * turn this will result in TCP based flow control kicking in and slowing
+      * data flow from the remote endpoint.
+      *
+-     * This is useful for applications that push new requests to a queue to be 
++     * This is useful for applications that push new requests to a queue to be
+      * processed by another thread and need a way to signal when their request
+      * queue is full without blocking the network processing thread.
+      *
+      * Use `resume_reading()` to resume.
+      *
+      * If supported by the transport this is done asynchronously. As such
+-     * reading may not stop until the current read operation completes. 
++     * reading may not stop until the current read operation completes.
+      * Typically you can expect to receive no more bytes after initiating a read
+      * pause than the size of the read buffer.
+      *
+      * If reading is paused for this connection already nothing is changed.
+      */
+     void pause_reading(connection_hdl hdl, lib::error_code & ec);
+-    
++
+     /// Pause reading of new data
+     void pause_reading(connection_hdl hdl);
+ 
+     /// Resume reading of new data (exception free)
+     /**
+-     * Signals to the connection to resume reading of new data after it was 
++     * Signals to the connection to resume reading of new data after it was
+      * paused by `pause_reading()`.
+      *
+      * If reading is not paused for this connection already nothing is changed.
+@@ -533,7 +533,7 @@ public:
+      * @param ec A status code, zero on success, non-zero otherwise
+      */
+     void send_http_response(connection_hdl hdl, lib::error_code & ec);
+-        
++
+     /// Send deferred HTTP Response (exception free)
+     /**
+      * Sends an http response to an HTTP connection that was deferred. This will
+diff --git a/websocketpp/logger/basic.hpp b/websocketpp/logger/basic.hpp
+index 8451413..7dd8684 100644
+--- a/websocketpp/logger/basic.hpp
++++ b/websocketpp/logger/basic.hpp
+@@ -58,46 +58,46 @@ namespace log {
+ template <typename concurrency, typename names>
+ class basic {
+ public:
+-    basic<concurrency,names>(channel_type_hint::value h =
++    basic(channel_type_hint::value h =
+         channel_type_hint::access)
+       : m_static_channels(0xffffffff)
+       , m_dynamic_channels(0)
+       , m_out(h == channel_type_hint::error ? &std::cerr : &std::cout) {}
+ 
+-    basic<concurrency,names>(std::ostream * out)
++    basic(std::ostream * out)
+       : m_static_channels(0xffffffff)
+       , m_dynamic_channels(0)
+       , m_out(out) {}
+ 
+-    basic<concurrency,names>(level c, channel_type_hint::value h =
++    basic(level c, channel_type_hint::value h =
+         channel_type_hint::access)
+       : m_static_channels(c)
+       , m_dynamic_channels(0)
+       , m_out(h == channel_type_hint::error ? &std::cerr : &std::cout) {}
+ 
+-    basic<concurrency,names>(level c, std::ostream * out)
++    basic(level c, std::ostream * out)
+       : m_static_channels(c)
+       , m_dynamic_channels(0)
+       , m_out(out) {}
+ 
+     /// Destructor
+-    ~basic<concurrency,names>() {}
++    ~basic() {}
+ 
+     /// Copy constructor
+-    basic<concurrency,names>(basic<concurrency,names> const & other)
++    basic(basic<concurrency,names> const & other)
+      : m_static_channels(other.m_static_channels)
+      , m_dynamic_channels(other.m_dynamic_channels)
+      , m_out(other.m_out)
+     {}
+-    
++
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+     // no copy assignment operator because of const member variables
+-    basic<concurrency,names> & operator=(basic<concurrency,names> const &) = delete;
++    basic & operator=(basic<concurrency,names> const &) = delete;
+ #endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ 
+ #ifdef _WEBSOCKETPP_MOVE_SEMANTICS_
+     /// Move constructor
+-    basic<concurrency,names>(basic<concurrency,names> && other)
++    basic(basic<concurrency,names> && other)
+      : m_static_channels(other.m_static_channels)
+      , m_dynamic_channels(other.m_dynamic_channels)
+      , m_out(other.m_out)
+@@ -105,7 +105,7 @@ public:
+ 
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+     // no move assignment operator because of const member variables
+-    basic<concurrency,names> & operator=(basic<concurrency,names> &&) = delete;
++    basic & operator=(basic<concurrency,names> &&) = delete;
+ #endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ 
+ #endif // _WEBSOCKETPP_MOVE_SEMANTICS_
+diff --git a/websocketpp/roles/server_endpoint.hpp b/websocketpp/roles/server_endpoint.hpp
+index 9cc652f..a96471b 100644
+--- a/websocketpp/roles/server_endpoint.hpp
++++ b/websocketpp/roles/server_endpoint.hpp
+@@ -72,23 +72,23 @@ public:
+     }
+ 
+     /// Destructor
+-    ~server<config>() {}
++    ~server() {}
+ 
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+     // no copy constructor because endpoints are not copyable
+-    server<config>(server<config> &) = delete;
++    server(server<config> &) = delete;
+ 
+     // no copy assignment operator because endpoints are not copyable
+-    server<config> & operator=(server<config> const &) = delete;
++    server & operator=(server<config> const &) = delete;
+ #endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ 
+ #ifdef _WEBSOCKETPP_MOVE_SEMANTICS_
+     /// Move constructor
+-    server<config>(server<config> && o) : endpoint<connection<config>,config>(std::move(o)) {}
++    server(server<config> && o) : endpoint<connection<config>,config>(std::move(o)) {}
+ 
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+     // no move assignment operator because of const member variables
+-    server<config> & operator=(server<config> &&) = delete;
++    server & operator=(server<config> &&) = delete;
+ #endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ 
+ #endif // _WEBSOCKETPP_MOVE_SEMANTICS_
+@@ -123,7 +123,7 @@ public:
+             ec = error::make_error_code(error::async_accept_not_listening);
+             return;
+         }
+-        
++
+         ec = lib::error_code();
+         connection_ptr con = get_connection();
+